drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c

   1 /*
   2  * Copyright (c) 2010 Broadcom Corporation
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  11  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  13  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  14  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include <linux/types.h>
  18 #include <linux/kernel.h>
  19 #include <linux/kthread.h>
  20 #include <linux/printk.h>
  21 #include <linux/pci_ids.h>
  22 #include <linux/netdevice.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/sched.h>
  25 #include <linux/mmc/sdio.h>
  26 #include <linux/mmc/sdio_func.h>
  27 #include <linux/mmc/card.h>
  28 #include <linux/semaphore.h>
  29 #include <linux/firmware.h>
  30 #include <linux/module.h>
  31 #include <linux/bcma/bcma.h>
  32 #include <linux/debugfs.h>
  33 #include <linux/vmalloc.h>
  34 #include <linux/platform_data/brcmfmac-sdio.h>
  35 #include <asm/unaligned.h>
  36 #include <defs.h>
  37 #include <brcmu_wifi.h>
  38 #include <brcmu_utils.h>
  39 #include <brcm_hw_ids.h>
  40 #include <soc.h>
  41 #include "sdio_host.h"
  42 #include "sdio_chip.h"
  43
  44 #define DCMD_RESP_TIMEOUT  2000 /* In milli second */
  45
  46 #ifdef DEBUG
  47
  48 #define BRCMF_TRAP_INFO_SIZE    80
  49
  50 #define CBUF_LEN        (128)
  51
  52 /* Device console log buffer state */
  53 #define CONSOLE_BUFFER_MAX      2024
  54
  55 struct rte_log_le {
  56         __le32 buf;             /* Can't be pointer on (64-bit) hosts */
  57         __le32 buf_size;
  58         __le32 idx;
  59         char *_buf_compat;      /* Redundant pointer for backward compat. */
  60 };
  61
  62 struct rte_console {
  63         /* Virtual UART
  64          * When there is no UART (e.g. Quickturn),
  65          * the host should write a complete
  66          * input line directly into cbuf and then write
  67          * the length into vcons_in.
  68          * This may also be used when there is a real UART
  69          * (at risk of conflicting with
  70          * the real UART).  vcons_out is currently unused.
  71          */
  72         uint vcons_in;
  73         uint vcons_out;
  74
  75         /* Output (logging) buffer
  76          * Console output is written to a ring buffer log_buf at index log_idx.
  77          * The host may read the output when it sees log_idx advance.
  78          * Output will be lost if the output wraps around faster than the host
  79          * polls.
  80          */
  81         struct rte_log_le log_le;
  82
  83         /* Console input line buffer
  84          * Characters are read one at a time into cbuf
  85          * until <CR> is received, then
  86          * the buffer is processed as a command line.
  87          * Also used for virtual UART.
  88          */
  89         uint cbuf_idx;
  90         char cbuf[CBUF_LEN];
  91 };
  92
  93 #endif                          /* DEBUG */
  94 #include <chipcommon.h>
  95
  96 #include "dhd_bus.h"
  97 #include "dhd_dbg.h"
  98 #include "tracepoint.h"
  99
 100 #define TXQLEN          2048    /* bulk tx queue length */
 101 #define TXHI            (TXQLEN - 256)  /* turn on flow control above TXHI */
 102 #define TXLOW           (TXHI - 256)    /* turn off flow control below TXLOW */
 103 #define PRIOMASK        7
 104
 105 #define TXRETRIES       2       /* # of retries for tx frames */
 106
 107 #define BRCMF_RXBOUND   50      /* Default for max rx frames in
 108                                  one scheduling */
 109
 110 #define BRCMF_TXBOUND   20      /* Default for max tx frames in
 111                                  one scheduling */
 112
 113 #define BRCMF_TXMINMAX  1       /* Max tx frames if rx still pending */
 114
 115 #define MEMBLOCK        2048    /* Block size used for downloading
 116                                  of dongle image */
 117 #define MAX_DATA_BUF    (32 * 1024)     /* Must be large enough to hold
 118                                  biggest possible glom */
 119
 120 #define BRCMF_FIRSTREAD (1 << 6)
 121
 122
 123 /* SBSDIO_DEVICE_CTL */
 124
 125 /* 1: device will assert busy signal when receiving CMD53 */
 126 #define SBSDIO_DEVCTL_SETBUSY           0x01
 127 /* 1: assertion of sdio interrupt is synchronous to the sdio clock */
 128 #define SBSDIO_DEVCTL_SPI_INTR_SYNC     0x02
 129 /* 1: mask all interrupts to host except the chipActive (rev 8) */
 130 #define SBSDIO_DEVCTL_CA_INT_ONLY       0x04
 131 /* 1: isolate internal sdio signals, put external pads in tri-state; requires
 132  * sdio bus power cycle to clear (rev 9) */
 133 #define SBSDIO_DEVCTL_PADS_ISO          0x08
 134 /* Force SD->SB reset mapping (rev 11) */
 135 #define SBSDIO_DEVCTL_SB_RST_CTL        0x30
 136 /*   Determined by CoreControl bit */
 137 #define SBSDIO_DEVCTL_RST_CORECTL       0x00
 138 /*   Force backplane reset */
 139 #define SBSDIO_DEVCTL_RST_BPRESET       0x10
 140 /*   Force no backplane reset */
 141 #define SBSDIO_DEVCTL_RST_NOBPRESET     0x20
 142
 143 /* direct(mapped) cis space */
 144
 145 /* MAPPED common CIS address */
 146 #define SBSDIO_CIS_BASE_COMMON          0x1000
 147 /* maximum bytes in one CIS */
 148 #define SBSDIO_CIS_SIZE_LIMIT           0x200
 149 /* cis offset addr is < 17 bits */
 150 #define SBSDIO_CIS_OFT_ADDR_MASK        0x1FFFF
 151
 152 /* manfid tuple length, include tuple, link bytes */
 153 #define SBSDIO_CIS_MANFID_TUPLE_LEN     6
 154
 155 /* intstatus */
 156 #define I_SMB_SW0       (1 << 0)        /* To SB Mail S/W interrupt 0 */
 157 #define I_SMB_SW1       (1 << 1)        /* To SB Mail S/W interrupt 1 */
 158 #define I_SMB_SW2       (1 << 2)        /* To SB Mail S/W interrupt 2 */
 159 #define I_SMB_SW3       (1 << 3)        /* To SB Mail S/W interrupt 3 */
 160 #define I_SMB_SW_MASK   0x0000000f      /* To SB Mail S/W interrupts mask */
 161 #define I_SMB_SW_SHIFT  0       /* To SB Mail S/W interrupts shift */
 162 #define I_HMB_SW0       (1 << 4)        /* To Host Mail S/W interrupt 0 */
 163 #define I_HMB_SW1       (1 << 5)        /* To Host Mail S/W interrupt 1 */
 164 #define I_HMB_SW2       (1 << 6)        /* To Host Mail S/W interrupt 2 */
 165 #define I_HMB_SW3       (1 << 7)        /* To Host Mail S/W interrupt 3 */
 166 #define I_HMB_SW_MASK   0x000000f0      /* To Host Mail S/W interrupts mask */
 167 #define I_HMB_SW_SHIFT  4       /* To Host Mail S/W interrupts shift */
 168 #define I_WR_OOSYNC     (1 << 8)        /* Write Frame Out Of Sync */
 169 #define I_RD_OOSYNC     (1 << 9)        /* Read Frame Out Of Sync */
 170 #define I_PC            (1 << 10)       /* descriptor error */
 171 #define I_PD            (1 << 11)       /* data error */
 172 #define I_DE            (1 << 12)       /* Descriptor protocol Error */
 173 #define I_RU            (1 << 13)       /* Receive descriptor Underflow */
 174 #define I_RO            (1 << 14)       /* Receive fifo Overflow */
 175 #define I_XU            (1 << 15)       /* Transmit fifo Underflow */
 176 #define I_RI            (1 << 16)       /* Receive Interrupt */
 177 #define I_BUSPWR        (1 << 17)       /* SDIO Bus Power Change (rev 9) */
 178 #define I_XMTDATA_AVAIL (1 << 23)       /* bits in fifo */
 179 #define I_XI            (1 << 24)       /* Transmit Interrupt */
 180 #define I_RF_TERM       (1 << 25)       /* Read Frame Terminate */
 181 #define I_WF_TERM       (1 << 26)       /* Write Frame Terminate */
 182 #define I_PCMCIA_XU     (1 << 27)       /* PCMCIA Transmit FIFO Underflow */
 183 #define I_SBINT         (1 << 28)       /* sbintstatus Interrupt */
 184 #define I_CHIPACTIVE    (1 << 29)       /* chip from doze to active state */
 185 #define I_SRESET        (1 << 30)       /* CCCR RES interrupt */
 186 #define I_IOE2          (1U << 31)      /* CCCR IOE2 Bit Changed */
 187 #define I_ERRORS        (I_PC | I_PD | I_DE | I_RU | I_RO | I_XU)
 188 #define I_DMA           (I_RI | I_XI | I_ERRORS)
 189
 190 /* corecontrol */
 191 #define CC_CISRDY               (1 << 0)        /* CIS Ready */
 192 #define CC_BPRESEN              (1 << 1)        /* CCCR RES signal */
 193 #define CC_F2RDY                (1 << 2)        /* set CCCR IOR2 bit */
 194 #define CC_CLRPADSISO           (1 << 3)        /* clear SDIO pads isolation */
 195 #define CC_XMTDATAAVAIL_MODE    (1 << 4)
 196 #define CC_XMTDATAAVAIL_CTRL    (1 << 5)
 197
 198 /* SDA_FRAMECTRL */
 199 #define SFC_RF_TERM     (1 << 0)        /* Read Frame Terminate */
 200 #define SFC_WF_TERM     (1 << 1)        /* Write Frame Terminate */
 201 #define SFC_CRC4WOOS    (1 << 2)        /* CRC error for write out of sync */
 202 #define SFC_ABORTALL    (1 << 3)        /* Abort all in-progress frames */
 203
 204 /* HW frame tag */
 205 #define SDPCM_FRAMETAG_LEN      4       /* 2 bytes len, 2 bytes check val */
 206
 207 /* Total length of frame header for dongle protocol */
 208 #define SDPCM_HDRLEN    (SDPCM_FRAMETAG_LEN + SDPCM_SWHEADER_LEN)
 209 #define SDPCM_RESERVE   (SDPCM_HDRLEN + BRCMF_SDALIGN)
 210
 211 /*
 212  * Software allocation of To SB Mailbox resources
 213  */
 214
 215 /* tosbmailbox bits corresponding to intstatus bits */
 216 #define SMB_NAK         (1 << 0)        /* Frame NAK */
 217 #define SMB_INT_ACK     (1 << 1)        /* Host Interrupt ACK */
 218 #define SMB_USE_OOB     (1 << 2)        /* Use OOB Wakeup */
 219 #define SMB_DEV_INT     (1 << 3)        /* Miscellaneous Interrupt */
 220
 221 /* tosbmailboxdata */
 222 #define SMB_DATA_VERSION_SHIFT  16      /* host protocol version */
 223
 224 /*
 225  * Software allocation of To Host Mailbox resources
 226  */
 227
 228 /* intstatus bits */
 229 #define I_HMB_FC_STATE  I_HMB_SW0       /* Flow Control State */
 230 #define I_HMB_FC_CHANGE I_HMB_SW1       /* Flow Control State Changed */
 231 #define I_HMB_FRAME_IND I_HMB_SW2       /* Frame Indication */
 232 #define I_HMB_HOST_INT  I_HMB_SW3       /* Miscellaneous Interrupt */
 233
 234 /* tohostmailboxdata */
 235 #define HMB_DATA_NAKHANDLED     1       /* retransmit NAK'd frame */
 236 #define HMB_DATA_DEVREADY       2       /* talk to host after enable */
 237 #define HMB_DATA_FC             4       /* per prio flowcontrol update flag */
 238 #define HMB_DATA_FWREADY        8       /* fw ready for protocol activity */
 239
 240 #define HMB_DATA_FCDATA_MASK    0xff000000
 241 #define HMB_DATA_FCDATA_SHIFT   24
 242
 243 #define HMB_DATA_VERSION_MASK   0x00ff0000
 244 #define HMB_DATA_VERSION_SHIFT  16
 245
 246 /*
 247  * Software-defined protocol header
 248  */
 249
 250 /* Current protocol version */
 251 #define SDPCM_PROT_VERSION      4
 252
 253 /* SW frame header */
 254 #define SDPCM_PACKET_SEQUENCE(p)        (((u8 *)p)[0] & 0xff)
 255
 256 #define SDPCM_CHANNEL_MASK              0x00000f00
 257 #define SDPCM_CHANNEL_SHIFT             8
 258 #define SDPCM_PACKET_CHANNEL(p)         (((u8 *)p)[1] & 0x0f)
 259
 260 #define SDPCM_NEXTLEN_OFFSET            2
 261
 262 /* Data Offset from SOF (HW Tag, SW Tag, Pad) */
 263 #define SDPCM_DOFFSET_OFFSET            3       /* Data Offset */
 264 #define SDPCM_DOFFSET_VALUE(p)          (((u8 *)p)[SDPCM_DOFFSET_OFFSET] & 0xff)
 265 #define SDPCM_DOFFSET_MASK              0xff000000
 266 #define SDPCM_DOFFSET_SHIFT             24
 267 #define SDPCM_FCMASK_OFFSET             4       /* Flow control */
 268 #define SDPCM_FCMASK_VALUE(p)           (((u8 *)p)[SDPCM_FCMASK_OFFSET] & 0xff)
 269 #define SDPCM_WINDOW_OFFSET             5       /* Credit based fc */
 270 #define SDPCM_WINDOW_VALUE(p)           (((u8 *)p)[SDPCM_WINDOW_OFFSET] & 0xff)
 271
 272 #define SDPCM_SWHEADER_LEN      8       /* SW header is 64 bits */
 273
 274 /* logical channel numbers */
 275 #define SDPCM_CONTROL_CHANNEL   0       /* Control channel Id */
 276 #define SDPCM_EVENT_CHANNEL     1       /* Asyc Event Indication Channel Id */
 277 #define SDPCM_DATA_CHANNEL      2       /* Data Xmit/Recv Channel Id */
 278 #define SDPCM_GLOM_CHANNEL      3       /* For coalesced packets */
 279 #define SDPCM_TEST_CHANNEL      15      /* Reserved for test/debug packets */
 280
 281 #define SDPCM_SEQUENCE_WRAP     256     /* wrap-around val for 8bit frame seq */
 282
 283 #define SDPCM_GLOMDESC(p)       (((u8 *)p)[1] & 0x80)
 284
 285 /*
 286  * Shared structure between dongle and the host.
 287  * The structure contains pointers to trap or assert information.
 288  */
 289 #define SDPCM_SHARED_VERSION       0x0003
 290 #define SDPCM_SHARED_VERSION_MASK  0x00FF
 291 #define SDPCM_SHARED_ASSERT_BUILT  0x0100
 292 #define SDPCM_SHARED_ASSERT        0x0200
 293 #define SDPCM_SHARED_TRAP          0x0400
 294
 295 /* Space for header read, limit for data packets */
 296 #define MAX_HDR_READ    (1 << 6)
 297 #define MAX_RX_DATASZ   2048
 298
 299 /* Maximum milliseconds to wait for F2 to come up */
 300 #define BRCMF_WAIT_F2RDY        3000
 301
 302 /* Bump up limit on waiting for HT to account for first startup;
 303  * if the image is doing a CRC calculation before programming the PMU
 304  * for HT availability, it could take a couple hundred ms more, so
 305  * max out at a 1 second (1000000us).
 306  */
 307 #undef PMU_MAX_TRANSITION_DLY
 308 #define PMU_MAX_TRANSITION_DLY 1000000
 309
 310 /* Value for ChipClockCSR during initial setup */
 311 #define BRCMF_INIT_CLKCTL1      (SBSDIO_FORCE_HW_CLKREQ_OFF |   \
 312                                         SBSDIO_ALP_AVAIL_REQ)
 313
 314 /* Flags for SDH calls */
 315 #define F2SYNC  (SDIO_REQ_4BYTE | SDIO_REQ_FIXED)
 316
 317 #define BRCMF_SDIO_FW_NAME      "brcm/brcmfmac-sdio.bin"
 318 #define BRCMF_SDIO_NV_NAME      "brcm/brcmfmac-sdio.txt"
 319 MODULE_FIRMWARE(BRCMF_SDIO_FW_NAME);
 320 MODULE_FIRMWARE(BRCMF_SDIO_NV_NAME);
 321
 322 #define BRCMF_IDLE_IMMEDIATE    (-1)    /* Enter idle immediately */
 323 #define BRCMF_IDLE_ACTIVE       0       /* Do not request any SD clock change
 324                                          * when idle
 325                                          */
 326 #define BRCMF_IDLE_INTERVAL     1
 327
 328 #define KSO_WAIT_US 50
 329 #define MAX_KSO_ATTEMPTS (PMU_MAX_TRANSITION_DLY/KSO_WAIT_US)
 330
 331 /*
 332  * Conversion of 802.1D priority to precedence level
 333  */
 334 static uint prio2prec(u32 prio)
 335 {
 336         return (prio == PRIO_8021D_NONE || prio == PRIO_8021D_BE) ?
 337                (prio^2) : prio;
 338 }
 339
 340 #ifdef DEBUG
 341 /* Device console log buffer state */
 342 struct brcmf_console {
 343         uint count;             /* Poll interval msec counter */
 344         uint log_addr;          /* Log struct address (fixed) */
 345         struct rte_log_le log_le;       /* Log struct (host copy) */
 346         uint bufsize;           /* Size of log buffer */
 347         u8 *buf;                /* Log buffer (host copy) */
 348         uint last;              /* Last buffer read index */
 349 };
 350
 351 struct brcmf_trap_info {
 352         __le32          type;
 353         __le32          epc;
 354         __le32          cpsr;
 355         __le32          spsr;
 356         __le32          r0;     /* a1 */
 357         __le32          r1;     /* a2 */
 358         __le32          r2;     /* a3 */
 359         __le32          r3;     /* a4 */
 360         __le32          r4;     /* v1 */
 361         __le32          r5;     /* v2 */
 362         __le32          r6;     /* v3 */
 363         __le32          r7;     /* v4 */
 364         __le32          r8;     /* v5 */
 365         __le32          r9;     /* sb/v6 */
 366         __le32          r10;    /* sl/v7 */
 367         __le32          r11;    /* fp/v8 */
 368         __le32          r12;    /* ip */
 369         __le32          r13;    /* sp */
 370         __le32          r14;    /* lr */
 371         __le32          pc;     /* r15 */
 372 };
 373 #endif                          /* DEBUG */
 374
 375 struct sdpcm_shared {
 376         u32 flags;
 377         u32 trap_addr;
 378         u32 assert_exp_addr;
 379         u32 assert_file_addr;
 380         u32 assert_line;
 381         u32 console_addr;       /* Address of struct rte_console */
 382         u32 msgtrace_addr;
 383         u8 tag[32];
 384         u32 brpt_addr;
 385 };
 386
 387 struct sdpcm_shared_le {
 388         __le32 flags;
 389         __le32 trap_addr;
 390         __le32 assert_exp_addr;
 391         __le32 assert_file_addr;
 392         __le32 assert_line;
 393         __le32 console_addr;    /* Address of struct rte_console */
 394         __le32 msgtrace_addr;
 395         u8 tag[32];
 396         __le32 brpt_addr;
 397 };
 398
 399 /* SDIO read frame info */
 400 struct brcmf_sdio_read {
 401         u8 seq_num;
 402         u8 channel;
 403         u16 len;
 404         u16 len_left;
 405         u16 len_nxtfrm;
 406         u8 dat_offset;
 407 };
 408
 409 /* misc chip info needed by some of the routines */
 410 /* Private data for SDIO bus interaction */
 411 struct brcmf_sdio {
 412         struct brcmf_sdio_dev *sdiodev; /* sdio device handler */
 413         struct chip_info *ci;   /* Chip info struct */
 414         char *vars;             /* Variables (from CIS and/or other) */
 415         uint varsz;             /* Size of variables buffer */
 416
 417         u32 ramsize;            /* Size of RAM in SOCRAM (bytes) */
 418
 419         u32 hostintmask;        /* Copy of Host Interrupt Mask */
 420         atomic_t intstatus;     /* Intstatus bits (events) pending */
 421         atomic_t fcstate;       /* State of dongle flow-control */
 422
 423         uint blocksize;         /* Block size of SDIO transfers */
 424         uint roundup;           /* Max roundup limit */
 425
 426         struct pktq txq;        /* Queue length used for flow-control */
 427         u8 flowcontrol; /* per prio flow control bitmask */
 428         u8 tx_seq;              /* Transmit sequence number (next) */
 429         u8 tx_max;              /* Maximum transmit sequence allowed */
 430
 431         u8 hdrbuf[MAX_HDR_READ + BRCMF_SDALIGN];
 432         u8 *rxhdr;              /* Header of current rx frame (in hdrbuf) */
 433         u8 rx_seq;              /* Receive sequence number (expected) */
 434         struct brcmf_sdio_read cur_read;
 435                                 /* info of current read frame */
 436         bool rxskip;            /* Skip receive (awaiting NAK ACK) */
 437         bool rxpending;         /* Data frame pending in dongle */
 438
 439         uint rxbound;           /* Rx frames to read before resched */
 440         uint txbound;           /* Tx frames to send before resched */
 441         uint txminmax;
 442
 443         struct sk_buff *glomd;  /* Packet containing glomming descriptor */
 444         struct sk_buff_head glom; /* Packet list for glommed superframe */
 445         uint glomerr;           /* Glom packet read errors */
 446
 447         u8 *rxbuf;              /* Buffer for receiving control packets */
 448         uint rxblen;            /* Allocated length of rxbuf */
 449         u8 *rxctl;              /* Aligned pointer into rxbuf */
 450         u8 *rxctl_orig;         /* pointer for freeing rxctl */
 451         u8 *databuf;            /* Buffer for receiving big glom packet */
 452         u8 *dataptr;            /* Aligned pointer into databuf */
 453         uint rxlen;             /* Length of valid data in buffer */
 454         spinlock_t rxctl_lock;  /* protection lock for ctrl frame resources */
 455
 456         u8 sdpcm_ver;   /* Bus protocol reported by dongle */
 457
 458         bool intr;              /* Use interrupts */
 459         bool poll;              /* Use polling */
 460         atomic_t ipend;         /* Device interrupt is pending */
 461         uint spurious;          /* Count of spurious interrupts */
 462         uint pollrate;          /* Ticks between device polls */
 463         uint polltick;          /* Tick counter */
 464
 465 #ifdef DEBUG
 466         uint console_interval;
 467         struct brcmf_console console;   /* Console output polling support */
 468         uint console_addr;      /* Console address from shared struct */
 469 #endif                          /* DEBUG */
 470
 471         uint clkstate;          /* State of sd and backplane clock(s) */
 472         bool activity;          /* Activity flag for clock down */
 473         s32 idletime;           /* Control for activity timeout */
 474         s32 idlecount;  /* Activity timeout counter */
 475         s32 idleclock;  /* How to set bus driver when idle */
 476         s32 sd_rxchain;
 477         bool use_rxchain;       /* If brcmf should use PKT chains */
 478         bool rxflow_mode;       /* Rx flow control mode */
 479         bool rxflow;            /* Is rx flow control on */
 480         bool alp_only;          /* Don't use HT clock (ALP only) */
 481
 482         u8 *ctrl_frame_buf;
 483         u32 ctrl_frame_len;
 484         bool ctrl_frame_stat;
 485
 486         spinlock_t txqlock;
 487         wait_queue_head_t ctrl_wait;
 488         wait_queue_head_t dcmd_resp_wait;
 489
 490         struct timer_list timer;
 491         struct completion watchdog_wait;
 492         struct task_struct *watchdog_tsk;
 493         bool wd_timer_valid;
 494         uint save_ms;
 495
 496         struct workqueue_struct *brcmf_wq;
 497         struct work_struct datawork;
 498         struct list_head dpc_tsklst;
 499         spinlock_t dpc_tl_lock;
 500
 501         const struct firmware *firmware;
 502         u32 fw_ptr;
 503
 504         bool txoff;             /* Transmit flow-controlled */
 505         struct brcmf_sdio_count sdcnt;
 506         bool sr_enabled; /* SaveRestore enabled */
 507         bool sleeping; /* SDIO bus sleeping */
 508 };
 509
 510 /* clkstate */
 511 #define CLK_NONE        0
 512 #define CLK_SDONLY      1
 513 #define CLK_PENDING     2
 514 #define CLK_AVAIL       3
 515
 516 #ifdef DEBUG
 517 static int qcount[NUMPRIO];
 518 static int tx_packets[NUMPRIO];
 519 #endif                          /* DEBUG */
 520
 521 #define DEFAULT_SDIO_DRIVE_STRENGTH     6       /* in milliamps */
 522
 523 #define RETRYCHAN(chan) ((chan) == SDPCM_EVENT_CHANNEL)
 524
 525 /* Retry count for register access failures */
 526 static const uint retry_limit = 2;
 527
 528 /* Limit on rounding up frames */
 529 static const uint max_roundup = 512;
 530
 531 #define ALIGNMENT  4
 532
 533 enum brcmf_sdio_frmtype {
 534         BRCMF_SDIO_FT_NORMAL,
 535         BRCMF_SDIO_FT_SUPER,
 536         BRCMF_SDIO_FT_SUB,
 537 };
 538
 539 static void pkt_align(struct sk_buff *p, int len, int align)
 540 {
 541         uint datalign;
 542         datalign = (unsigned long)(p->data);
 543         datalign = roundup(datalign, (align)) - datalign;
 544         if (datalign)
 545                 skb_pull(p, datalign);
 546         __skb_trim(p, len);
 547 }
 548
 549 /* To check if there's window offered */
 550 static bool data_ok(struct brcmf_sdio *bus)
 551 {
 552         return (u8)(bus->tx_max - bus->tx_seq) != 0 &&
 553                ((u8)(bus->tx_max - bus->tx_seq) & 0x80) == 0;
 554 }
 555
 556 /*
 557  * Reads a register in the SDIO hardware block. This block occupies a series of
 558  * adresses on the 32 bit backplane bus.
 559  */
 560 static int
 561 r_sdreg32(struct brcmf_sdio *bus, u32 *regvar, u32 offset)
 562 {
 563         u8 idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
 564         int ret;
 565
 566         *regvar = brcmf_sdio_regrl(bus->sdiodev,
 567                                    bus->ci->c_inf[idx].base + offset, &ret);
 568
 569         return ret;
 570 }
 571
 572 static int
 573 w_sdreg32(struct brcmf_sdio *bus, u32 regval, u32 reg_offset)
 574 {
 575         u8 idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
 576         int ret;
 577
 578         brcmf_sdio_regwl(bus->sdiodev,
 579                          bus->ci->c_inf[idx].base + reg_offset,
 580                          regval, &ret);
 581
 582         return ret;
 583 }
 584
 585 static int
 586 brcmf_sdbrcm_kso_control(struct brcmf_sdio *bus, bool on)
 587 {
 588         u8 wr_val = 0, rd_val, cmp_val, bmask;
 589         int err = 0;
 590         int try_cnt = 0;
 591
 592         brcmf_dbg(TRACE, "Enter\n");
 593
 594         wr_val = (on << SBSDIO_FUNC1_SLEEPCSR_KSO_SHIFT);
 595         /* 1st KSO write goes to AOS wake up core if device is asleep  */
 596         brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR,
 597                          wr_val, &err);
 598         if (err) {
 599                 brcmf_err("SDIO_AOS KSO write error: %d\n", err);
 600                 return err;
 601         }
 602
 603         if (on) {
 604                 /* device WAKEUP through KSO:
 605                  * write bit 0 & read back until
 606                  * both bits 0 (kso bit) & 1 (dev on status) are set
 607                  */
 608                 cmp_val = SBSDIO_FUNC1_SLEEPCSR_KSO_MASK |
 609                           SBSDIO_FUNC1_SLEEPCSR_DEVON_MASK;
 610                 bmask = cmp_val;
 611                 usleep_range(2000, 3000);
 612         } else {
 613                 /* Put device to sleep, turn off KSO */
 614                 cmp_val = 0;
 615                 /* only check for bit0, bit1(dev on status) may not
 616                  * get cleared right away
 617                  */
 618                 bmask = SBSDIO_FUNC1_SLEEPCSR_KSO_MASK;
 619         }
 620
 621         do {
 622                 /* reliable KSO bit set/clr:
 623                  * the sdiod sleep write access is synced to PMU 32khz clk
 624                  * just one write attempt may fail,
 625                  * read it back until it matches written value
 626                  */
 627                 rd_val = brcmf_sdio_regrb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR,
 628                                           &err);
 629                 if (((rd_val & bmask) == cmp_val) && !err)
 630                         break;
 631                 brcmf_dbg(SDIO, "KSO wr/rd retry:%d (max: %d) ERR:%x\n",
 632                           try_cnt, MAX_KSO_ATTEMPTS, err);
 633                 udelay(KSO_WAIT_US);
 634                 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR,
 635                                  wr_val, &err);
 636         } while (try_cnt++ < MAX_KSO_ATTEMPTS);
 637
 638         return err;
 639 }
 640
 641 #define PKT_AVAILABLE()         (intstatus & I_HMB_FRAME_IND)
 642
 643 #define HOSTINTMASK             (I_HMB_SW_MASK | I_CHIPACTIVE)
 644
 645 /* Turn backplane clock on or off */
 646 static int brcmf_sdbrcm_htclk(struct brcmf_sdio *bus, bool on, bool pendok)
 647 {
 648         int err;
 649         u8 clkctl, clkreq, devctl;
 650         unsigned long timeout;
 651
 652         brcmf_dbg(SDIO, "Enter\n");
 653
 654         clkctl = 0;
 655
 656         if (bus->sr_enabled) {
 657                 bus->clkstate = (on ? CLK_AVAIL : CLK_SDONLY);
 658                 return 0;
 659         }
 660
 661         if (on) {
 662                 /* Request HT Avail */
 663                 clkreq =
 664                     bus->alp_only ? SBSDIO_ALP_AVAIL_REQ : SBSDIO_HT_AVAIL_REQ;
 665
 666                 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
 667                                  clkreq, &err);
 668                 if (err) {
 669                         brcmf_err("HT Avail request error: %d\n", err);
 670                         return -EBADE;
 671                 }
 672
 673                 /* Check current status */
 674                 clkctl = brcmf_sdio_regrb(bus->sdiodev,
 675                                           SBSDIO_FUNC1_CHIPCLKCSR, &err);
 676                 if (err) {
 677                         brcmf_err("HT Avail read error: %d\n", err);
 678                         return -EBADE;
 679                 }
 680
 681                 /* Go to pending and await interrupt if appropriate */
 682                 if (!SBSDIO_CLKAV(clkctl, bus->alp_only) && pendok) {
 683                         /* Allow only clock-available interrupt */
 684                         devctl = brcmf_sdio_regrb(bus->sdiodev,
 685                                                   SBSDIO_DEVICE_CTL, &err);
 686                         if (err) {
 687                                 brcmf_err("Devctl error setting CA: %d\n",
 688                                           err);
 689                                 return -EBADE;
 690                         }
 691
 692                         devctl |= SBSDIO_DEVCTL_CA_INT_ONLY;
 693                         brcmf_sdio_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
 694                                          devctl, &err);
 695                         brcmf_dbg(SDIO, "CLKCTL: set PENDING\n");
 696                         bus->clkstate = CLK_PENDING;
 697
 698                         return 0;
 699                 } else if (bus->clkstate == CLK_PENDING) {
 700                         /* Cancel CA-only interrupt filter */
 701                         devctl = brcmf_sdio_regrb(bus->sdiodev,
 702                                                   SBSDIO_DEVICE_CTL, &err);
 703                         devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY;
 704                         brcmf_sdio_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
 705                                          devctl, &err);
 706                 }
 707
 708                 /* Otherwise, wait here (polling) for HT Avail */
 709                 timeout = jiffies +
 710                           msecs_to_jiffies(PMU_MAX_TRANSITION_DLY/1000);
 711                 while (!SBSDIO_CLKAV(clkctl, bus->alp_only)) {
 712                         clkctl = brcmf_sdio_regrb(bus->sdiodev,
 713                                                   SBSDIO_FUNC1_CHIPCLKCSR,
 714                                                   &err);
 715                         if (time_after(jiffies, timeout))
 716                                 break;
 717                         else
 718                                 usleep_range(5000, 10000);
 719                 }
 720                 if (err) {
 721                         brcmf_err("HT Avail request error: %d\n", err);
 722                         return -EBADE;
 723                 }
 724                 if (!SBSDIO_CLKAV(clkctl, bus->alp_only)) {
 725                         brcmf_err("HT Avail timeout (%d): clkctl 0x%02x\n",
 726                                   PMU_MAX_TRANSITION_DLY, clkctl);
 727                         return -EBADE;
 728                 }
 729
 730                 /* Mark clock available */
 731                 bus->clkstate = CLK_AVAIL;
 732                 brcmf_dbg(SDIO, "CLKCTL: turned ON\n");
 733
 734 #if defined(DEBUG)
 735                 if (!bus->alp_only) {
 736                         if (SBSDIO_ALPONLY(clkctl))
 737                                 brcmf_err("HT Clock should be on\n");
 738                 }
 739 #endif                          /* defined (DEBUG) */
 740
 741                 bus->activity = true;
 742         } else {
 743                 clkreq = 0;
 744
 745                 if (bus->clkstate == CLK_PENDING) {
 746                         /* Cancel CA-only interrupt filter */
 747                         devctl = brcmf_sdio_regrb(bus->sdiodev,
 748                                                   SBSDIO_DEVICE_CTL, &err);
 749                         devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY;
 750                         brcmf_sdio_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
 751                                          devctl, &err);
 752                 }
 753
 754                 bus->clkstate = CLK_SDONLY;
 755                 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
 756                                  clkreq, &err);
 757                 brcmf_dbg(SDIO, "CLKCTL: turned OFF\n");
 758                 if (err) {
 759                         brcmf_err("Failed access turning clock off: %d\n",
 760                                   err);
 761                         return -EBADE;
 762                 }
 763         }
 764         return 0;
 765 }
 766
 767 /* Change idle/active SD state */
 768 static int brcmf_sdbrcm_sdclk(struct brcmf_sdio *bus, bool on)
 769 {
 770         brcmf_dbg(SDIO, "Enter\n");
 771
 772         if (on)
 773                 bus->clkstate = CLK_SDONLY;
 774         else
 775                 bus->clkstate = CLK_NONE;
 776
 777         return 0;
 778 }
 779
 780 /* Transition SD and backplane clock readiness */
 781 static int brcmf_sdbrcm_clkctl(struct brcmf_sdio *bus, uint target, bool pendok)
 782 {
 783 #ifdef DEBUG
 784         uint oldstate = bus->clkstate;
 785 #endif                          /* DEBUG */
 786
 787         brcmf_dbg(SDIO, "Enter\n");
 788
 789         /* Early exit if we're already there */
 790         if (bus->clkstate == target) {
 791                 if (target == CLK_AVAIL) {
 792                         brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS);
 793                         bus->activity = true;
 794                 }
 795                 return 0;
 796         }
 797
 798         switch (target) {
 799         case CLK_AVAIL:
 800                 /* Make sure SD clock is available */
 801                 if (bus->clkstate == CLK_NONE)
 802                         brcmf_sdbrcm_sdclk(bus, true);
 803                 /* Now request HT Avail on the backplane */
 804                 brcmf_sdbrcm_htclk(bus, true, pendok);
 805                 brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS);
 806                 bus->activity = true;
 807                 break;
 808
 809         case CLK_SDONLY:
 810                 /* Remove HT request, or bring up SD clock */
 811                 if (bus->clkstate == CLK_NONE)
 812                         brcmf_sdbrcm_sdclk(bus, true);
 813                 else if (bus->clkstate == CLK_AVAIL)
 814                         brcmf_sdbrcm_htclk(bus, false, false);
 815                 else
 816                         brcmf_err("request for %d -> %d\n",
 817                                   bus->clkstate, target);
 818                 brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS);
 819                 break;
 820
 821         case CLK_NONE:
 822                 /* Make sure to remove HT request */
 823                 if (bus->clkstate == CLK_AVAIL)
 824                         brcmf_sdbrcm_htclk(bus, false, false);
 825                 /* Now remove the SD clock */
 826                 brcmf_sdbrcm_sdclk(bus, false);
 827                 brcmf_sdbrcm_wd_timer(bus, 0);
 828                 break;
 829         }
 830 #ifdef DEBUG
 831         brcmf_dbg(SDIO, "%d -> %d\n", oldstate, bus->clkstate);
 832 #endif                          /* DEBUG */
 833
 834         return 0;
 835 }
 836
 837 static int
 838 brcmf_sdbrcm_bus_sleep(struct brcmf_sdio *bus, bool sleep, bool pendok)
 839 {
 840         int err = 0;
 841         brcmf_dbg(TRACE, "Enter\n");
 842         brcmf_dbg(SDIO, "request %s currently %s\n",
 843                   (sleep ? "SLEEP" : "WAKE"),
 844                   (bus->sleeping ? "SLEEP" : "WAKE"));
 845
 846         /* If SR is enabled control bus state with KSO */
 847         if (bus->sr_enabled) {
 848                 /* Done if we're already in the requested state */
 849                 if (sleep == bus->sleeping)
 850                         goto end;
 851
 852                 /* Going to sleep */
 853                 if (sleep) {
 854                         /* Don't sleep if something is pending */
 855                         if (atomic_read(&bus->intstatus) ||
 856                             atomic_read(&bus->ipend) > 0 ||
 857                             (!atomic_read(&bus->fcstate) &&
 858                             brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) &&
 859                             data_ok(bus)))
 860                                  return -EBUSY;
 861                         err = brcmf_sdbrcm_kso_control(bus, false);
 862                         /* disable watchdog */
 863                         if (!err)
 864                                 brcmf_sdbrcm_wd_timer(bus, 0);
 865                 } else {
 866                         bus->idlecount = 0;
 867                         err = brcmf_sdbrcm_kso_control(bus, true);
 868                 }
 869                 if (!err) {
 870                         /* Change state */
 871                         bus->sleeping = sleep;
 872                         brcmf_dbg(SDIO, "new state %s\n",
 873                                   (sleep ? "SLEEP" : "WAKE"));
 874                 } else {
 875                         brcmf_err("error while changing bus sleep state %d\n",
 876                                   err);
 877                         return err;
 878                 }
 879         }
 880
 881 end:
 882         /* control clocks */
 883         if (sleep) {
 884                 if (!bus->sr_enabled)
 885                         brcmf_sdbrcm_clkctl(bus, CLK_NONE, pendok);
 886         } else {
 887                 brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, pendok);
 888         }
 889
 890         return err;
 891
 892 }
 893
 894 static u32 brcmf_sdbrcm_hostmail(struct brcmf_sdio *bus)
 895 {
 896         u32 intstatus = 0;
 897         u32 hmb_data;
 898         u8 fcbits;
 899         int ret;
 900
 901         brcmf_dbg(SDIO, "Enter\n");
 902
 903         /* Read mailbox data and ack that we did so */
 904         ret = r_sdreg32(bus, &hmb_data,
 905                         offsetof(struct sdpcmd_regs, tohostmailboxdata));
 906
 907         if (ret == 0)
 908                 w_sdreg32(bus, SMB_INT_ACK,
 909                           offsetof(struct sdpcmd_regs, tosbmailbox));
 910         bus->sdcnt.f1regdata += 2;
 911
 912         /* Dongle recomposed rx frames, accept them again */
 913         if (hmb_data & HMB_DATA_NAKHANDLED) {
 914                 brcmf_dbg(SDIO, "Dongle reports NAK handled, expect rtx of %d\n",
 915                           bus->rx_seq);
 916                 if (!bus->rxskip)
 917                         brcmf_err("unexpected NAKHANDLED!\n");
 918
 919                 bus->rxskip = false;
 920                 intstatus |= I_HMB_FRAME_IND;
 921         }
 922
 923         /*
 924          * DEVREADY does not occur with gSPI.
 925          */
 926         if (hmb_data & (HMB_DATA_DEVREADY | HMB_DATA_FWREADY)) {
 927                 bus->sdpcm_ver =
 928                     (hmb_data & HMB_DATA_VERSION_MASK) >>
 929                     HMB_DATA_VERSION_SHIFT;
 930                 if (bus->sdpcm_ver != SDPCM_PROT_VERSION)
 931                         brcmf_err("Version mismatch, dongle reports %d, "
 932                                   "expecting %d\n",
 933                                   bus->sdpcm_ver, SDPCM_PROT_VERSION);
 934                 else
 935                         brcmf_dbg(SDIO, "Dongle ready, protocol version %d\n",
 936                                   bus->sdpcm_ver);
 937         }
 938
 939         /*
 940          * Flow Control has been moved into the RX headers and this out of band
 941          * method isn't used any more.
 942          * remaining backward compatible with older dongles.
 943          */
 944         if (hmb_data & HMB_DATA_FC) {
 945                 fcbits = (hmb_data & HMB_DATA_FCDATA_MASK) >>
 946                                                         HMB_DATA_FCDATA_SHIFT;
 947
 948                 if (fcbits & ~bus->flowcontrol)
 949                         bus->sdcnt.fc_xoff++;
 950
 951                 if (bus->flowcontrol & ~fcbits)
 952                         bus->sdcnt.fc_xon++;
 953
 954                 bus->sdcnt.fc_rcvd++;
 955                 bus->flowcontrol = fcbits;
 956         }
 957
 958         /* Shouldn't be any others */
 959         if (hmb_data & ~(HMB_DATA_DEVREADY |
 960                          HMB_DATA_NAKHANDLED |
 961                          HMB_DATA_FC |
 962                          HMB_DATA_FWREADY |
 963                          HMB_DATA_FCDATA_MASK | HMB_DATA_VERSION_MASK))
 964                 brcmf_err("Unknown mailbox data content: 0x%02x\n",
 965                           hmb_data);
 966
 967         return intstatus;
 968 }
 969
 970 static void brcmf_sdbrcm_rxfail(struct brcmf_sdio *bus, bool abort, bool rtx)
 971 {
 972         uint retries = 0;
 973         u16 lastrbc;
 974         u8 hi, lo;
 975         int err;
 976
 977         brcmf_err("%sterminate frame%s\n",
 978                   abort ? "abort command, " : "",
 979                   rtx ? ", send NAK" : "");
 980
 981         if (abort)
 982                 brcmf_sdcard_abort(bus->sdiodev, SDIO_FUNC_2);
 983
 984         brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_FRAMECTRL,
 985                          SFC_RF_TERM, &err);
 986         bus->sdcnt.f1regdata++;
 987
 988         /* Wait until the packet has been flushed (device/FIFO stable) */
 989         for (lastrbc = retries = 0xffff; retries > 0; retries--) {
 990                 hi = brcmf_sdio_regrb(bus->sdiodev,
 991                                       SBSDIO_FUNC1_RFRAMEBCHI, &err);
 992                 lo = brcmf_sdio_regrb(bus->sdiodev,
 993                                       SBSDIO_FUNC1_RFRAMEBCLO, &err);
 994                 bus->sdcnt.f1regdata += 2;
 995
 996                 if ((hi == 0) && (lo == 0))
 997                         break;
 998
 999                 if ((hi > (lastrbc >> 8)) && (lo > (lastrbc & 0x00ff))) {
1000                         brcmf_err("count growing: last 0x%04x now 0x%04x\n",
1001                                   lastrbc, (hi << 8) + lo);
1002                 }
1003                 lastrbc = (hi << 8) + lo;
1004         }
1005
1006         if (!retries)
1007                 brcmf_err("count never zeroed: last 0x%04x\n", lastrbc);
1008         else
1009                 brcmf_dbg(SDIO, "flush took %d iterations\n", 0xffff - retries);
1010
1011         if (rtx) {
1012                 bus->sdcnt.rxrtx++;
1013                 err = w_sdreg32(bus, SMB_NAK,
1014                                 offsetof(struct sdpcmd_regs, tosbmailbox));
1015
1016                 bus->sdcnt.f1regdata++;
1017                 if (err == 0)
1018                         bus->rxskip = true;
1019         }
1020
1021         /* Clear partial in any case */
1022         bus->cur_read.len = 0;
1023
1024         /* If we can't reach the device, signal failure */
1025         if (err)
1026                 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
1027 }
1028
1029 /* copy a buffer into a pkt buffer chain */
1030 static uint brcmf_sdbrcm_glom_from_buf(struct brcmf_sdio *bus, uint len)
1031 {
1032         uint n, ret = 0;
1033         struct sk_buff *p;
1034         u8 *buf;
1035
1036         buf = bus->dataptr;
1037
1038         /* copy the data */
1039         skb_queue_walk(&bus->glom, p) {
1040                 n = min_t(uint, p->len, len);
1041                 memcpy(p->data, buf, n);
1042                 buf += n;
1043                 len -= n;
1044                 ret += n;
1045                 if (!len)
1046                         break;
1047         }
1048
1049         return ret;
1050 }
1051
1052 /* return total length of buffer chain */
1053 static uint brcmf_sdbrcm_glom_len(struct brcmf_sdio *bus)
1054 {
1055         struct sk_buff *p;
1056         uint total;
1057
1058         total = 0;
1059         skb_queue_walk(&bus->glom, p)
1060                 total += p->len;
1061         return total;
1062 }
1063
1064 static void brcmf_sdbrcm_free_glom(struct brcmf_sdio *bus)
1065 {
1066         struct sk_buff *cur, *next;
1067
1068         skb_queue_walk_safe(&bus->glom, cur, next) {
1069                 skb_unlink(cur, &bus->glom);
1070                 brcmu_pkt_buf_free_skb(cur);
1071         }
1072 }
1073
1074 static int brcmf_sdio_hdparser(struct brcmf_sdio *bus, u8 *header,
1075                                struct brcmf_sdio_read *rd,
1076                                enum brcmf_sdio_frmtype type)
1077 {
1078         u16 len, checksum;
1079         u8 rx_seq, fc, tx_seq_max;
1080
1081         /*
1082          * 4 bytes hardware header (frame tag)
1083          * Byte 0~1: Frame length
1084          * Byte 2~3: Checksum, bit-wise inverse of frame length
1085          */
1086         len = get_unaligned_le16(header);
1087         checksum = get_unaligned_le16(header + sizeof(u16));
1088         /* All zero means no more to read */
1089         if (!(len | checksum)) {
1090                 bus->rxpending = false;
1091                 return -ENODATA;
1092         }
1093         if ((u16)(~(len ^ checksum))) {
1094                 brcmf_err("HW header checksum error\n");
1095                 bus->sdcnt.rx_badhdr++;
1096                 brcmf_sdbrcm_rxfail(bus, false, false);
1097                 return -EIO;
1098         }
1099         if (len < SDPCM_HDRLEN) {
1100                 brcmf_err("HW header length error\n");
1101                 return -EPROTO;
1102         }
1103         if (type == BRCMF_SDIO_FT_SUPER &&
1104             (roundup(len, bus->blocksize) != rd->len)) {
1105                 brcmf_err("HW superframe header length error\n");
1106                 return -EPROTO;
1107         }
1108         if (type == BRCMF_SDIO_FT_SUB && len > rd->len) {
1109                 brcmf_err("HW subframe header length error\n");
1110                 return -EPROTO;
1111         }
1112         rd->len = len;
1113
1114         /*
1115          * 8 bytes hardware header
1116          * Byte 0: Rx sequence number
1117          * Byte 1: 4 MSB Channel number, 4 LSB arbitrary flag
1118          * Byte 2: Length of next data frame
1119          * Byte 3: Data offset
1120          * Byte 4: Flow control bits
1121          * Byte 5: Maximum Sequence number allow for Tx
1122          * Byte 6~7: Reserved
1123          */
1124         if (type == BRCMF_SDIO_FT_SUPER &&
1125             SDPCM_GLOMDESC(&header[SDPCM_FRAMETAG_LEN])) {
1126                 brcmf_err("Glom descriptor found in superframe head\n");
1127                 rd->len = 0;
1128                 return -EINVAL;
1129         }
1130         rx_seq = SDPCM_PACKET_SEQUENCE(&header[SDPCM_FRAMETAG_LEN]);
1131         rd->channel = SDPCM_PACKET_CHANNEL(&header[SDPCM_FRAMETAG_LEN]);
1132         if (len > MAX_RX_DATASZ && rd->channel != SDPCM_CONTROL_CHANNEL &&
1133             type != BRCMF_SDIO_FT_SUPER) {
1134                 brcmf_err("HW header length too long\n");
1135                 bus->sdcnt.rx_toolong++;
1136                 brcmf_sdbrcm_rxfail(bus, false, false);
1137                 rd->len = 0;
1138                 return -EPROTO;
1139         }
1140         if (type == BRCMF_SDIO_FT_SUPER && rd->channel != SDPCM_GLOM_CHANNEL) {
1141                 brcmf_err("Wrong channel for superframe\n");
1142                 rd->len = 0;
1143                 return -EINVAL;
1144         }
1145         if (type == BRCMF_SDIO_FT_SUB && rd->channel != SDPCM_DATA_CHANNEL &&
1146             rd->channel != SDPCM_EVENT_CHANNEL) {
1147                 brcmf_err("Wrong channel for subframe\n");
1148                 rd->len = 0;
1149                 return -EINVAL;
1150         }
1151         rd->dat_offset = SDPCM_DOFFSET_VALUE(&header[SDPCM_FRAMETAG_LEN]);
1152         if (rd->dat_offset < SDPCM_HDRLEN || rd->dat_offset > rd->len) {
1153                 brcmf_err("seq %d: bad data offset\n", rx_seq);
1154                 bus->sdcnt.rx_badhdr++;
1155                 brcmf_sdbrcm_rxfail(bus, false, false);
1156                 rd->len = 0;
1157                 return -ENXIO;
1158         }
1159         if (rd->seq_num != rx_seq) {
1160                 brcmf_err("seq %d: sequence number error, expect %d\n",
1161                           rx_seq, rd->seq_num);
1162                 bus->sdcnt.rx_badseq++;
1163                 rd->seq_num = rx_seq;
1164         }
1165         /* no need to check the reset for subframe */
1166         if (type == BRCMF_SDIO_FT_SUB)
1167                 return 0;
1168         rd->len_nxtfrm = header[SDPCM_FRAMETAG_LEN + SDPCM_NEXTLEN_OFFSET];
1169         if (rd->len_nxtfrm << 4 > MAX_RX_DATASZ) {
1170                 /* only warm for NON glom packet */
1171                 if (rd->channel != SDPCM_GLOM_CHANNEL)
1172                         brcmf_err("seq %d: next length error\n", rx_seq);
1173                 rd->len_nxtfrm = 0;
1174         }
1175         fc = SDPCM_FCMASK_VALUE(&header[SDPCM_FRAMETAG_LEN]);
1176         if (bus->flowcontrol != fc) {
1177                 if (~bus->flowcontrol & fc)
1178                         bus->sdcnt.fc_xoff++;
1179                 if (bus->flowcontrol & ~fc)
1180                         bus->sdcnt.fc_xon++;
1181                 bus->sdcnt.fc_rcvd++;
1182                 bus->flowcontrol = fc;
1183         }
1184         tx_seq_max = SDPCM_WINDOW_VALUE(&header[SDPCM_FRAMETAG_LEN]);
1185         if ((u8)(tx_seq_max - bus->tx_seq) > 0x40) {
1186                 brcmf_err("seq %d: max tx seq number error\n", rx_seq);
1187                 tx_seq_max = bus->tx_seq + 2;
1188         }
1189         bus->tx_max = tx_seq_max;
1190
1191         return 0;
1192 }
1193
1194 static u8 brcmf_sdbrcm_rxglom(struct brcmf_sdio *bus, u8 rxseq)
1195 {
1196         u16 dlen, totlen;
1197         u8 *dptr, num = 0;
1198
1199         u16 sublen;
1200         struct sk_buff *pfirst, *pnext;
1201
1202         int errcode;
1203         u8 doff, sfdoff;
1204
1205         bool usechain = bus->use_rxchain;
1206
1207         struct brcmf_sdio_read rd_new;
1208
1209         /* If packets, issue read(s) and send up packet chain */
1210         /* Return sequence numbers consumed? */
1211
1212         brcmf_dbg(SDIO, "start: glomd %p glom %p\n",
1213                   bus->glomd, skb_peek(&bus->glom));
1214
1215         /* If there's a descriptor, generate the packet chain */
1216         if (bus->glomd) {
1217                 pfirst = pnext = NULL;
1218                 dlen = (u16) (bus->glomd->len);
1219                 dptr = bus->glomd->data;
1220                 if (!dlen || (dlen & 1)) {
1221                         brcmf_err("bad glomd len(%d), ignore descriptor\n",
1222                                   dlen);
1223                         dlen = 0;
1224                 }
1225
1226                 for (totlen = num = 0; dlen; num++) {
1227                         /* Get (and move past) next length */
1228                         sublen = get_unaligned_le16(dptr);
1229                         dlen -= sizeof(u16);
1230                         dptr += sizeof(u16);
1231                         if ((sublen < SDPCM_HDRLEN) ||
1232                             ((num == 0) && (sublen < (2 * SDPCM_HDRLEN)))) {
1233                                 brcmf_err("descriptor len %d bad: %d\n",
1234                                           num, sublen);
1235                                 pnext = NULL;
1236                                 break;
1237                         }
1238                         if (sublen % BRCMF_SDALIGN) {
1239                                 brcmf_err("sublen %d not multiple of %d\n",
1240                                           sublen, BRCMF_SDALIGN);
1241                                 usechain = false;
1242                         }
1243                         totlen += sublen;
1244
1245                         /* For last frame, adjust read len so total
1246                                  is a block multiple */
1247                         if (!dlen) {
1248                                 sublen +=
1249                                     (roundup(totlen, bus->blocksize) - totlen);
1250                                 totlen = roundup(totlen, bus->blocksize);
1251                         }
1252
1253                         /* Allocate/chain packet for next subframe */
1254                         pnext = brcmu_pkt_buf_get_skb(sublen + BRCMF_SDALIGN);
1255                         if (pnext == NULL) {
1256                                 brcmf_err("bcm_pkt_buf_get_skb failed, num %d len %d\n",
1257                                           num, sublen);
1258                                 break;
1259                         }
1260                         skb_queue_tail(&bus->glom, pnext);
1261
1262                         /* Adhere to start alignment requirements */
1263                         pkt_align(pnext, sublen, BRCMF_SDALIGN);
1264                 }
1265
1266                 /* If all allocations succeeded, save packet chain
1267                          in bus structure */
1268                 if (pnext) {
1269                         brcmf_dbg(GLOM, "allocated %d-byte packet chain for %d subframes\n",
1270                                   totlen, num);
1271                         if (BRCMF_GLOM_ON() && bus->cur_read.len &&
1272                             totlen != bus->cur_read.len) {
1273                                 brcmf_dbg(GLOM, "glomdesc mismatch: nextlen %d glomdesc %d rxseq %d\n",
1274                                           bus->cur_read.len, totlen, rxseq);
1275                         }
1276                         pfirst = pnext = NULL;
1277                 } else {
1278                         brcmf_sdbrcm_free_glom(bus);
1279                         num = 0;
1280                 }
1281
1282                 /* Done with descriptor packet */
1283                 brcmu_pkt_buf_free_skb(bus->glomd);
1284                 bus->glomd = NULL;
1285                 bus->cur_read.len = 0;
1286         }
1287
1288         /* Ok -- either we just generated a packet chain,
1289                  or had one from before */
1290         if (!skb_queue_empty(&bus->glom)) {
1291                 if (BRCMF_GLOM_ON()) {
1292                         brcmf_dbg(GLOM, "try superframe read, packet chain:\n");
1293                         skb_queue_walk(&bus->glom, pnext) {
1294                                 brcmf_dbg(GLOM, "    %p: %p len 0x%04x (%d)\n",
1295                                           pnext, (u8 *) (pnext->data),
1296                                           pnext->len, pnext->len);
1297                         }
1298                 }
1299
1300                 pfirst = skb_peek(&bus->glom);
1301                 dlen = (u16) brcmf_sdbrcm_glom_len(bus);
1302
1303                 /* Do an SDIO read for the superframe.  Configurable iovar to
1304                  * read directly into the chained packet, or allocate a large
1305                  * packet and and copy into the chain.
1306                  */
1307                 sdio_claim_host(bus->sdiodev->func[1]);
1308                 if (usechain) {
1309                         errcode = brcmf_sdcard_recv_chain(bus->sdiodev,
1310                                         bus->sdiodev->sbwad,
1311                                         SDIO_FUNC_2, F2SYNC, &bus->glom);
1312                 } else if (bus->dataptr) {
1313                         errcode = brcmf_sdcard_recv_buf(bus->sdiodev,
1314                                         bus->sdiodev->sbwad,
1315                                         SDIO_FUNC_2, F2SYNC,
1316                                         bus->dataptr, dlen);
1317                         sublen = (u16) brcmf_sdbrcm_glom_from_buf(bus, dlen);
1318                         if (sublen != dlen) {
1319                                 brcmf_err("FAILED TO COPY, dlen %d sublen %d\n",
1320                                           dlen, sublen);
1321                                 errcode = -1;
1322                         }
1323                         pnext = NULL;
1324                 } else {
1325                         brcmf_err("COULDN'T ALLOC %d-BYTE GLOM, FORCE FAILURE\n",
1326                                   dlen);
1327                         errcode = -1;
1328                 }
1329                 sdio_release_host(bus->sdiodev->func[1]);
1330                 bus->sdcnt.f2rxdata++;
1331
1332                 /* On failure, kill the superframe, allow a couple retries */
1333                 if (errcode < 0) {
1334                         brcmf_err("glom read of %d bytes failed: %d\n",
1335                                   dlen, errcode);
1336
1337                         sdio_claim_host(bus->sdiodev->func[1]);
1338                         if (bus->glomerr++ < 3) {
1339                                 brcmf_sdbrcm_rxfail(bus, true, true);
1340                         } else {
1341                                 bus->glomerr = 0;
1342                                 brcmf_sdbrcm_rxfail(bus, true, false);
1343                                 bus->sdcnt.rxglomfail++;
1344                                 brcmf_sdbrcm_free_glom(bus);
1345                         }
1346                         sdio_release_host(bus->sdiodev->func[1]);
1347                         return 0;
1348                 }
1349
1350                 brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1351                                    pfirst->data, min_t(int, pfirst->len, 48),
1352                                    "SUPERFRAME:\n");
1353
1354                 rd_new.seq_num = rxseq;
1355                 rd_new.len = dlen;
1356                 sdio_claim_host(bus->sdiodev->func[1]);
1357                 errcode = brcmf_sdio_hdparser(bus, pfirst->data, &rd_new,
1358                                               BRCMF_SDIO_FT_SUPER);
1359                 sdio_release_host(bus->sdiodev->func[1]);
1360                 bus->cur_read.len = rd_new.len_nxtfrm << 4;
1361
1362                 /* Remove superframe header, remember offset */
1363                 skb_pull(pfirst, rd_new.dat_offset);
1364                 sfdoff = rd_new.dat_offset;
1365                 num = 0;
1366
1367                 /* Validate all the subframe headers */
1368                 skb_queue_walk(&bus->glom, pnext) {
1369                         /* leave when invalid subframe is found */
1370                         if (errcode)
1371                                 break;
1372
1373                         rd_new.len = pnext->len;
1374                         rd_new.seq_num = rxseq++;
1375                         sdio_claim_host(bus->sdiodev->func[1]);
1376                         errcode = brcmf_sdio_hdparser(bus, pnext->data, &rd_new,
1377                                                       BRCMF_SDIO_FT_SUB);
1378                         sdio_release_host(bus->sdiodev->func[1]);
1379                         brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1380                                            pnext->data, 32, "subframe:\n");
1381
1382                         num++;
1383                 }
1384
1385                 if (errcode) {
1386                         /* Terminate frame on error, request
1387                                  a couple retries */
1388                         sdio_claim_host(bus->sdiodev->func[1]);
1389                         if (bus->glomerr++ < 3) {
1390                                 /* Restore superframe header space */
1391                                 skb_push(pfirst, sfdoff);
1392                                 brcmf_sdbrcm_rxfail(bus, true, true);
1393                         } else {
1394                                 bus->glomerr = 0;
1395                                 brcmf_sdbrcm_rxfail(bus, true, false);
1396                                 bus->sdcnt.rxglomfail++;
1397                                 brcmf_sdbrcm_free_glom(bus);
1398                         }
1399                         sdio_release_host(bus->sdiodev->func[1]);
1400                         bus->cur_read.len = 0;
1401                         return 0;
1402                 }
1403
1404                 /* Basic SD framing looks ok - process each packet (header) */
1405
1406                 skb_queue_walk_safe(&bus->glom, pfirst, pnext) {
1407                         dptr = (u8 *) (pfirst->data);
1408                         sublen = get_unaligned_le16(dptr);
1409                         doff = SDPCM_DOFFSET_VALUE(&dptr[SDPCM_FRAMETAG_LEN]);
1410
1411                         brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_DATA_ON(),
1412                                            dptr, pfirst->len,
1413                                            "Rx Subframe Data:\n");
1414
1415                         __skb_trim(pfirst, sublen);
1416                         skb_pull(pfirst, doff);
1417
1418                         if (pfirst->len == 0) {
1419                                 skb_unlink(pfirst, &bus->glom);
1420                                 brcmu_pkt_buf_free_skb(pfirst);
1421                                 continue;
1422                         }
1423
1424                         brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1425                                            pfirst->data,
1426                                            min_t(int, pfirst->len, 32),
1427                                            "subframe %d to stack, %p (%p/%d) nxt/lnk %p/%p\n",
1428                                            bus->glom.qlen, pfirst, pfirst->data,
1429                                            pfirst->len, pfirst->next,
1430                                            pfirst->prev);
1431                 }
1432                 /* sent any remaining packets up */
1433                 if (bus->glom.qlen)
1434                         brcmf_rx_frames(bus->sdiodev->dev, &bus->glom);
1435
1436                 bus->sdcnt.rxglomframes++;
1437                 bus->sdcnt.rxglompkts += bus->glom.qlen;
1438         }
1439         return num;
1440 }
1441
1442 static int brcmf_sdbrcm_dcmd_resp_wait(struct brcmf_sdio *bus, uint *condition,
1443                                         bool *pending)
1444 {
1445         DECLARE_WAITQUEUE(wait, current);
1446         int timeout = msecs_to_jiffies(DCMD_RESP_TIMEOUT);
1447
1448         /* Wait until control frame is available */
1449         add_wait_queue(&bus->dcmd_resp_wait, &wait);
1450         set_current_state(TASK_INTERRUPTIBLE);
1451
1452         while (!(*condition) && (!signal_pending(current) && timeout))
1453                 timeout = schedule_timeout(timeout);
1454
1455         if (signal_pending(current))
1456                 *pending = true;
1457
1458         set_current_state(TASK_RUNNING);
1459         remove_wait_queue(&bus->dcmd_resp_wait, &wait);
1460
1461         return timeout;
1462 }
1463
1464 static int brcmf_sdbrcm_dcmd_resp_wake(struct brcmf_sdio *bus)
1465 {
1466         if (waitqueue_active(&bus->dcmd_resp_wait))
1467                 wake_up_interruptible(&bus->dcmd_resp_wait);
1468
1469         return 0;
1470 }
1471 static void
1472 brcmf_sdbrcm_read_control(struct brcmf_sdio *bus, u8 *hdr, uint len, uint doff)
1473 {
1474         uint rdlen, pad;
1475         u8 *buf = NULL, *rbuf;
1476         int sdret;
1477
1478         brcmf_dbg(TRACE, "Enter\n");
1479
1480         if (bus->rxblen)
1481                 buf = vzalloc(bus->rxblen);
1482         if (!buf)
1483                 goto done;
1484
1485         rbuf = bus->rxbuf;
1486         pad = ((unsigned long)rbuf % BRCMF_SDALIGN);
1487         if (pad)
1488                 rbuf += (BRCMF_SDALIGN - pad);
1489
1490         /* Copy the already-read portion over */
1491         memcpy(buf, hdr, BRCMF_FIRSTREAD);
1492         if (len <= BRCMF_FIRSTREAD)
1493                 goto gotpkt;
1494
1495         /* Raise rdlen to next SDIO block to avoid tail command */
1496         rdlen = len - BRCMF_FIRSTREAD;
1497         if (bus->roundup && bus->blocksize && (rdlen > bus->blocksize)) {
1498                 pad = bus->blocksize - (rdlen % bus->blocksize);
1499                 if ((pad <= bus->roundup) && (pad < bus->blocksize) &&
1500                     ((len + pad) < bus->sdiodev->bus_if->maxctl))
1501                         rdlen += pad;
1502         } else if (rdlen % BRCMF_SDALIGN) {
1503                 rdlen += BRCMF_SDALIGN - (rdlen % BRCMF_SDALIGN);
1504         }
1505
1506         /* Satisfy length-alignment requirements */
1507         if (rdlen & (ALIGNMENT - 1))
1508                 rdlen = roundup(rdlen, ALIGNMENT);
1509
1510         /* Drop if the read is too big or it exceeds our maximum */
1511         if ((rdlen + BRCMF_FIRSTREAD) > bus->sdiodev->bus_if->maxctl) {
1512                 brcmf_err("%d-byte control read exceeds %d-byte buffer\n",
1513                           rdlen, bus->sdiodev->bus_if->maxctl);
1514                 brcmf_sdbrcm_rxfail(bus, false, false);
1515                 goto done;
1516         }
1517
1518         if ((len - doff) > bus->sdiodev->bus_if->maxctl) {
1519                 brcmf_err("%d-byte ctl frame (%d-byte ctl data) exceeds %d-byte limit\n",
1520                           len, len - doff, bus->sdiodev->bus_if->maxctl);
1521                 bus->sdcnt.rx_toolong++;
1522                 brcmf_sdbrcm_rxfail(bus, false, false);
1523                 goto done;
1524         }
1525
1526         /* Read remain of frame body */
1527         sdret = brcmf_sdcard_recv_buf(bus->sdiodev,
1528                                 bus->sdiodev->sbwad,
1529                                 SDIO_FUNC_2,
1530                                 F2SYNC, rbuf, rdlen);
1531         bus->sdcnt.f2rxdata++;
1532
1533         /* Control frame failures need retransmission */
1534         if (sdret < 0) {
1535                 brcmf_err("read %d control bytes failed: %d\n",
1536                           rdlen, sdret);
1537                 bus->sdcnt.rxc_errors++;
1538                 brcmf_sdbrcm_rxfail(bus, true, true);
1539                 goto done;
1540         } else
1541                 memcpy(buf + BRCMF_FIRSTREAD, rbuf, rdlen);
1542
1543 gotpkt:
1544
1545         brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_CTL_ON(),
1546                            buf, len, "RxCtrl:\n");
1547
1548         /* Point to valid data and indicate its length */
1549         spin_lock_bh(&bus->rxctl_lock);
1550         if (bus->rxctl) {
1551                 brcmf_err("last control frame is being processed.\n");
1552                 spin_unlock_bh(&bus->rxctl_lock);
1553                 vfree(buf);
1554                 goto done;
1555         }
1556         bus->rxctl = buf + doff;
1557         bus->rxctl_orig = buf;
1558         bus->rxlen = len - doff;
1559         spin_unlock_bh(&bus->rxctl_lock);
1560
1561 done:
1562         /* Awake any waiters */
1563         brcmf_sdbrcm_dcmd_resp_wake(bus);
1564 }
1565
1566 /* Pad read to blocksize for efficiency */
1567 static void brcmf_pad(struct brcmf_sdio *bus, u16 *pad, u16 *rdlen)
1568 {
1569         if (bus->roundup && bus->blocksize && *rdlen > bus->blocksize) {
1570                 *pad = bus->blocksize - (*rdlen % bus->blocksize);
1571                 if (*pad <= bus->roundup && *pad < bus->blocksize &&
1572                     *rdlen + *pad + BRCMF_FIRSTREAD < MAX_RX_DATASZ)
1573                         *rdlen += *pad;
1574         } else if (*rdlen % BRCMF_SDALIGN) {
1575                 *rdlen += BRCMF_SDALIGN - (*rdlen % BRCMF_SDALIGN);
1576         }
1577 }
1578
1579 static uint brcmf_sdio_readframes(struct brcmf_sdio *bus, uint maxframes)
1580 {
1581         struct sk_buff *pkt;            /* Packet for event or data frames */
1582         struct sk_buff_head pktlist;    /* needed for bus interface */
1583         u16 pad;                /* Number of pad bytes to read */
1584         uint rxleft = 0;        /* Remaining number of frames allowed */
1585         int ret;                /* Return code from calls */
1586         uint rxcount = 0;       /* Total frames read */
1587         struct brcmf_sdio_read *rd = &bus->cur_read, rd_new;
1588         u8 head_read = 0;
1589
1590         brcmf_dbg(TRACE, "Enter\n");
1591
1592         /* Not finished unless we encounter no more frames indication */
1593         bus->rxpending = true;
1594
1595         for (rd->seq_num = bus->rx_seq, rxleft = maxframes;
1596              !bus->rxskip && rxleft &&
1597              bus->sdiodev->bus_if->state != BRCMF_BUS_DOWN;
1598              rd->seq_num++, rxleft--) {
1599
1600                 /* Handle glomming separately */
1601                 if (bus->glomd || !skb_queue_empty(&bus->glom)) {
1602                         u8 cnt;
1603                         brcmf_dbg(GLOM, "calling rxglom: glomd %p, glom %p\n",
1604                                   bus->glomd, skb_peek(&bus->glom));
1605                         cnt = brcmf_sdbrcm_rxglom(bus, rd->seq_num);
1606                         brcmf_dbg(GLOM, "rxglom returned %d\n", cnt);
1607                         rd->seq_num += cnt - 1;
1608                         rxleft = (rxleft > cnt) ? (rxleft - cnt) : 1;
1609                         continue;
1610                 }
1611
1612                 rd->len_left = rd->len;
1613                 /* read header first for unknow frame length */
1614                 sdio_claim_host(bus->sdiodev->func[1]);
1615                 if (!rd->len) {
1616                         ret = brcmf_sdcard_recv_buf(bus->sdiodev,
1617                                                       bus->sdiodev->sbwad,
1618                                                       SDIO_FUNC_2, F2SYNC,
1619                                                       bus->rxhdr,
1620                                                       BRCMF_FIRSTREAD);
1621                         bus->sdcnt.f2rxhdrs++;
1622                         if (ret < 0) {
1623                                 brcmf_err("RXHEADER FAILED: %d\n",
1624                                           ret);
1625                                 bus->sdcnt.rx_hdrfail++;
1626                                 brcmf_sdbrcm_rxfail(bus, true, true);
1627                                 sdio_release_host(bus->sdiodev->func[1]);
1628                                 continue;
1629                         }
1630
1631                         brcmf_dbg_hex_dump(BRCMF_BYTES_ON() || BRCMF_HDRS_ON(),
1632                                            bus->rxhdr, SDPCM_HDRLEN,
1633                                            "RxHdr:\n");
1634
1635                         if (brcmf_sdio_hdparser(bus, bus->rxhdr, rd,
1636                                                 BRCMF_SDIO_FT_NORMAL)) {
1637                                 sdio_release_host(bus->sdiodev->func[1]);
1638                                 if (!bus->rxpending)
1639                                         break;
1640                                 else
1641                                         continue;
1642                         }
1643
1644                         if (rd->channel == SDPCM_CONTROL_CHANNEL) {
1645                                 brcmf_sdbrcm_read_control(bus, bus->rxhdr,
1646                                                           rd->len,
1647                                                           rd->dat_offset);
1648                                 /* prepare the descriptor for the next read */
1649                                 rd->len = rd->len_nxtfrm << 4;
1650                                 rd->len_nxtfrm = 0;
1651                                 /* treat all packet as event if we don't know */
1652                                 rd->channel = SDPCM_EVENT_CHANNEL;
1653                                 sdio_release_host(bus->sdiodev->func[1]);
1654                                 continue;
1655                         }
1656                         rd->len_left = rd->len > BRCMF_FIRSTREAD ?
1657                                        rd->len - BRCMF_FIRSTREAD : 0;
1658                         head_read = BRCMF_FIRSTREAD;
1659                 }
1660
1661                 brcmf_pad(bus, &pad, &rd->len_left);
1662
1663                 pkt = brcmu_pkt_buf_get_skb(rd->len_left + head_read +
1664                                             BRCMF_SDALIGN);
1665                 if (!pkt) {
1666                         /* Give up on data, request rtx of events */
1667                         brcmf_err("brcmu_pkt_buf_get_skb failed\n");
1668                         brcmf_sdbrcm_rxfail(bus, false,
1669                                             RETRYCHAN(rd->channel));
1670                         sdio_release_host(bus->sdiodev->func[1]);
1671                         continue;
1672                 }
1673                 skb_pull(pkt, head_read);
1674                 pkt_align(pkt, rd->len_left, BRCMF_SDALIGN);
1675
1676                 ret = brcmf_sdcard_recv_pkt(bus->sdiodev, bus->sdiodev->sbwad,
1677                                               SDIO_FUNC_2, F2SYNC, pkt);
1678                 bus->sdcnt.f2rxdata++;
1679                 sdio_release_host(bus->sdiodev->func[1]);
1680
1681                 if (ret < 0) {
1682                         brcmf_err("read %d bytes from channel %d failed: %d\n",
1683                                   rd->len, rd->channel, ret);
1684                         brcmu_pkt_buf_free_skb(pkt);
1685                         sdio_claim_host(bus->sdiodev->func[1]);
1686                         brcmf_sdbrcm_rxfail(bus, true,
1687                                             RETRYCHAN(rd->channel));
1688                         sdio_release_host(bus->sdiodev->func[1]);
1689                         continue;
1690                 }
1691
1692                 if (head_read) {
1693                         skb_push(pkt, head_read);
1694                         memcpy(pkt->data, bus->rxhdr, head_read);
1695                         head_read = 0;
1696                 } else {
1697                         memcpy(bus->rxhdr, pkt->data, SDPCM_HDRLEN);
1698                         rd_new.seq_num = rd->seq_num;
1699                         sdio_claim_host(bus->sdiodev->func[1]);
1700                         if (brcmf_sdio_hdparser(bus, bus->rxhdr, &rd_new,
1701                                                 BRCMF_SDIO_FT_NORMAL)) {
1702                                 rd->len = 0;
1703                                 brcmu_pkt_buf_free_skb(pkt);
1704                         }
1705                         bus->sdcnt.rx_readahead_cnt++;
1706                         if (rd->len != roundup(rd_new.len, 16)) {
1707                                 brcmf_err("frame length mismatch:read %d, should be %d\n",
1708                                           rd->len,
1709                                           roundup(rd_new.len, 16) >> 4);
1710                                 rd->len = 0;
1711                                 brcmf_sdbrcm_rxfail(bus, true, true);
1712                                 sdio_release_host(bus->sdiodev->func[1]);
1713                                 brcmu_pkt_buf_free_skb(pkt);
1714                                 continue;
1715                         }
1716                         sdio_release_host(bus->sdiodev->func[1]);
1717                         rd->len_nxtfrm = rd_new.len_nxtfrm;
1718                         rd->channel = rd_new.channel;
1719                         rd->dat_offset = rd_new.dat_offset;
1720
1721                         brcmf_dbg_hex_dump(!(BRCMF_BYTES_ON() &&
1722                                              BRCMF_DATA_ON()) &&
1723                                            BRCMF_HDRS_ON(),
1724                                            bus->rxhdr, SDPCM_HDRLEN,
1725                                            "RxHdr:\n");
1726
1727                         if (rd_new.channel == SDPCM_CONTROL_CHANNEL) {
1728                                 brcmf_err("readahead on control packet %d?\n",
1729                                           rd_new.seq_num);
1730                                 /* Force retry w/normal header read */
1731                                 rd->len = 0;
1732                                 sdio_claim_host(bus->sdiodev->func[1]);
1733                                 brcmf_sdbrcm_rxfail(bus, false, true);
1734                                 sdio_release_host(bus->sdiodev->func[1]);
1735                                 brcmu_pkt_buf_free_skb(pkt);
1736                                 continue;
1737                         }
1738                 }
1739
1740                 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_DATA_ON(),
1741                                    pkt->data, rd->len, "Rx Data:\n");
1742
1743                 /* Save superframe descriptor and allocate packet frame */
1744                 if (rd->channel == SDPCM_GLOM_CHANNEL) {
1745                         if (SDPCM_GLOMDESC(&bus->rxhdr[SDPCM_FRAMETAG_LEN])) {
1746                                 brcmf_dbg(GLOM, "glom descriptor, %d bytes:\n",
1747                                           rd->len);
1748                                 brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1749                                                    pkt->data, rd->len,
1750                                                    "Glom Data:\n");
1751                                 __skb_trim(pkt, rd->len);
1752                                 skb_pull(pkt, SDPCM_HDRLEN);
1753                                 bus->glomd = pkt;
1754                         } else {
1755                                 brcmf_err("%s: glom superframe w/o "
1756                                           "descriptor!\n", __func__);
1757                                 sdio_claim_host(bus->sdiodev->func[1]);
1758                                 brcmf_sdbrcm_rxfail(bus, false, false);
1759                                 sdio_release_host(bus->sdiodev->func[1]);
1760                         }
1761                         /* prepare the descriptor for the next read */
1762                         rd->len = rd->len_nxtfrm << 4;
1763                         rd->len_nxtfrm = 0;
1764                         /* treat all packet as event if we don't know */
1765                         rd->channel = SDPCM_EVENT_CHANNEL;
1766                         continue;
1767                 }
1768
1769                 /* Fill in packet len and prio, deliver upward */
1770                 __skb_trim(pkt, rd->len);
1771                 skb_pull(pkt, rd->dat_offset);
1772
1773                 /* prepare the descriptor for the next read */
1774                 rd->len = rd->len_nxtfrm << 4;
1775                 rd->len_nxtfrm = 0;
1776                 /* treat all packet as event if we don't know */
1777                 rd->channel = SDPCM_EVENT_CHANNEL;
1778
1779                 if (pkt->len == 0) {
1780                         brcmu_pkt_buf_free_skb(pkt);
1781                         continue;
1782                 }
1783
1784                 skb_queue_head_init(&pktlist);
1785                 skb_queue_tail(&pktlist, pkt);
1786                 brcmf_rx_frames(bus->sdiodev->dev, &pktlist);
1787         }
1788
1789         rxcount = maxframes - rxleft;
1790         /* Message if we hit the limit */
1791         if (!rxleft)
1792                 brcmf_dbg(DATA, "hit rx limit of %d frames\n", maxframes);
1793         else
1794                 brcmf_dbg(DATA, "processed %d frames\n", rxcount);
1795         /* Back off rxseq if awaiting rtx, update rx_seq */
1796         if (bus->rxskip)
1797                 rd->seq_num--;
1798         bus->rx_seq = rd->seq_num;
1799
1800         return rxcount;
1801 }
1802
1803 static void
1804 brcmf_sdbrcm_wait_event_wakeup(struct brcmf_sdio *bus)
1805 {
1806         if (waitqueue_active(&bus->ctrl_wait))
1807                 wake_up_interruptible(&bus->ctrl_wait);
1808         return;
1809 }
1810
1811 /* Writes a HW/SW header into the packet and sends it. */
1812 /* Assumes: (a) header space already there, (b) caller holds lock */
1813 static int brcmf_sdbrcm_txpkt(struct brcmf_sdio *bus, struct sk_buff *pkt,
1814                               uint chan)
1815 {
1816         int ret;
1817         u8 *frame;
1818         u16 len, pad = 0;
1819         u32 swheader;
1820         int i;
1821
1822         brcmf_dbg(TRACE, "Enter\n");
1823
1824         frame = (u8 *) (pkt->data);
1825
1826         /* Add alignment padding, allocate new packet if needed */
1827         pad = ((unsigned long)frame % BRCMF_SDALIGN);
1828         if (pad) {
1829                 if (skb_headroom(pkt) < pad) {
1830                         brcmf_dbg(INFO, "insufficient headroom %d for %d pad\n",
1831                                   skb_headroom(pkt), pad);
1832                         bus->sdiodev->bus_if->tx_realloc++;
1833                         ret = skb_cow(pkt, BRCMF_SDALIGN);
1834                         if (ret)
1835                                 goto done;
1836                         pad = ((unsigned long)frame % BRCMF_SDALIGN);
1837                 }
1838                 skb_push(pkt, pad);
1839                 frame = (u8 *) (pkt->data);
1840                 memset(frame, 0, pad + SDPCM_HDRLEN);
1841         }
1842         /* precondition: pad < BRCMF_SDALIGN */
1843
1844         /* Hardware tag: 2 byte len followed by 2 byte ~len check (all LE) */
1845         len = (u16) (pkt->len);
1846         *(__le16 *) frame = cpu_to_le16(len);
1847         *(((__le16 *) frame) + 1) = cpu_to_le16(~len);
1848
1849         /* Software tag: channel, sequence number, data offset */
1850         swheader =
1851             ((chan << SDPCM_CHANNEL_SHIFT) & SDPCM_CHANNEL_MASK) | bus->tx_seq |
1852             (((pad +
1853                SDPCM_HDRLEN) << SDPCM_DOFFSET_SHIFT) & SDPCM_DOFFSET_MASK);
1854
1855         *(((__le32 *) frame) + 1) = cpu_to_le32(swheader);
1856         *(((__le32 *) frame) + 2) = 0;
1857
1858 #ifdef DEBUG
1859         tx_packets[pkt->priority]++;
1860 #endif
1861
1862         brcmf_dbg_hex_dump(BRCMF_BYTES_ON() &&
1863                            ((BRCMF_CTL_ON() && chan == SDPCM_CONTROL_CHANNEL) ||
1864                             (BRCMF_DATA_ON() && chan != SDPCM_CONTROL_CHANNEL)),
1865                            frame, len, "Tx Frame:\n");
1866         brcmf_dbg_hex_dump(!(BRCMF_BYTES_ON() &&
1867                              ((BRCMF_CTL_ON() &&
1868                                chan == SDPCM_CONTROL_CHANNEL) ||
1869                               (BRCMF_DATA_ON() &&
1870                                chan != SDPCM_CONTROL_CHANNEL))) &&
1871                            BRCMF_HDRS_ON(),
1872                            frame, min_t(u16, len, 16), "TxHdr:\n");
1873
1874         /* Raise len to next SDIO block to eliminate tail command */
1875         if (bus->roundup && bus->blocksize && (len > bus->blocksize)) {
1876                 u16 pad = bus->blocksize - (len % bus->blocksize);
1877                 if ((pad <= bus->roundup) && (pad < bus->blocksize))
1878                                 len += pad;
1879         } else if (len % BRCMF_SDALIGN) {
1880                 len += BRCMF_SDALIGN - (len % BRCMF_SDALIGN);
1881         }
1882
1883         /* Some controllers have trouble with odd bytes -- round to even */
1884         if (len & (ALIGNMENT - 1))
1885                         len = roundup(len, ALIGNMENT);
1886
1887         sdio_claim_host(bus->sdiodev->func[1]);
1888         ret = brcmf_sdcard_send_pkt(bus->sdiodev, bus->sdiodev->sbwad,
1889                                     SDIO_FUNC_2, F2SYNC, pkt);
1890         bus->sdcnt.f2txdata++;
1891
1892         if (ret < 0) {
1893                 /* On failure, abort the command and terminate the frame */
1894                 brcmf_dbg(INFO, "sdio error %d, abort command and terminate frame\n",
1895                           ret);
1896                 bus->sdcnt.tx_sderrs++;
1897
1898                 brcmf_sdcard_abort(bus->sdiodev, SDIO_FUNC_2);
1899                 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_FRAMECTRL,
1900                                  SFC_WF_TERM, NULL);
1901                 bus->sdcnt.f1regdata++;
1902
1903                 for (i = 0; i < 3; i++) {
1904                         u8 hi, lo;
1905                         hi = brcmf_sdio_regrb(bus->sdiodev,
1906                                               SBSDIO_FUNC1_WFRAMEBCHI, NULL);
1907                         lo = brcmf_sdio_regrb(bus->sdiodev,
1908                                               SBSDIO_FUNC1_WFRAMEBCLO, NULL);
1909                         bus->sdcnt.f1regdata += 2;
1910                         if ((hi == 0) && (lo == 0))
1911                                 break;
1912                 }
1913
1914         }
1915         sdio_release_host(bus->sdiodev->func[1]);
1916         if (ret == 0)
1917                 bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQUENCE_WRAP;
1918
1919 done:
1920         /* restore pkt buffer pointer before calling tx complete routine */
1921         skb_pull(pkt, SDPCM_HDRLEN + pad);
1922         brcmf_txcomplete(bus->sdiodev->dev, pkt, ret == 0);
1923         return ret;
1924 }
1925
1926 static uint brcmf_sdbrcm_sendfromq(struct brcmf_sdio *bus, uint maxframes)
1927 {
1928         struct sk_buff *pkt;
1929         u32 intstatus = 0;
1930         int ret = 0, prec_out;
1931         uint cnt = 0;
1932         uint datalen;
1933         u8 tx_prec_map;
1934
1935         brcmf_dbg(TRACE, "Enter\n");
1936
1937         tx_prec_map = ~bus->flowcontrol;
1938
1939         /* Send frames until the limit or some other event */
1940         for (cnt = 0; (cnt < maxframes) && data_ok(bus); cnt++) {
1941                 spin_lock_bh(&bus->txqlock);
1942                 pkt = brcmu_pktq_mdeq(&bus->txq, tx_prec_map, &prec_out);
1943                 if (pkt == NULL) {
1944                         spin_unlock_bh(&bus->txqlock);
1945                         break;
1946                 }
1947                 spin_unlock_bh(&bus->txqlock);
1948                 datalen = pkt->len - SDPCM_HDRLEN;
1949
1950                 ret = brcmf_sdbrcm_txpkt(bus, pkt, SDPCM_DATA_CHANNEL);
1951
1952                 /* In poll mode, need to check for other events */
1953                 if (!bus->intr && cnt) {
1954                         /* Check device status, signal pending interrupt */
1955                         sdio_claim_host(bus->sdiodev->func[1]);
1956                         ret = r_sdreg32(bus, &intstatus,
1957                                         offsetof(struct sdpcmd_regs,
1958                                                  intstatus));
1959                         sdio_release_host(bus->sdiodev->func[1]);
1960                         bus->sdcnt.f2txdata++;
1961                         if (ret != 0)
1962                                 break;
1963                         if (intstatus & bus->hostintmask)
1964                                 atomic_set(&bus->ipend, 1);
1965                 }
1966         }
1967
1968         /* Deflow-control stack if needed */
1969         if ((bus->sdiodev->bus_if->state == BRCMF_BUS_DATA) &&
1970             bus->txoff && (pktq_len(&bus->txq) < TXLOW)) {
1971                 bus->txoff = false;
1972                 brcmf_txflowblock(bus->sdiodev->dev, false);
1973         }
1974
1975         return cnt;
1976 }
1977
1978 static void brcmf_sdbrcm_bus_stop(struct device *dev)
1979 {
1980         u32 local_hostintmask;
1981         u8 saveclk;
1982         int err;
1983         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
1984         struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
1985         struct brcmf_sdio *bus = sdiodev->bus;
1986
1987         brcmf_dbg(TRACE, "Enter\n");
1988
1989         if (bus->watchdog_tsk) {
1990                 send_sig(SIGTERM, bus->watchdog_tsk, 1);
1991                 kthread_stop(bus->watchdog_tsk);
1992                 bus->watchdog_tsk = NULL;
1993         }
1994
1995         sdio_claim_host(bus->sdiodev->func[1]);
1996
1997         /* Enable clock for device interrupts */
1998         brcmf_sdbrcm_bus_sleep(bus, false, false);
1999
2000         /* Disable and clear interrupts at the chip level also */
2001         w_sdreg32(bus, 0, offsetof(struct sdpcmd_regs, hostintmask));
2002         local_hostintmask = bus->hostintmask;
2003         bus->hostintmask = 0;
2004
2005         /* Change our idea of bus state */
2006         bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
2007
2008         /* Force clocks on backplane to be sure F2 interrupt propagates */
2009         saveclk = brcmf_sdio_regrb(bus->sdiodev,
2010                                    SBSDIO_FUNC1_CHIPCLKCSR, &err);
2011         if (!err) {
2012                 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
2013                                  (saveclk | SBSDIO_FORCE_HT), &err);
2014         }
2015         if (err)
2016                 brcmf_err("Failed to force clock for F2: err %d\n", err);
2017
2018         /* Turn off the bus (F2), free any pending packets */
2019         brcmf_dbg(INTR, "disable SDIO interrupts\n");
2020         brcmf_sdio_regwb(bus->sdiodev, SDIO_CCCR_IOEx, SDIO_FUNC_ENABLE_1,
2021                          NULL);
2022
2023         /* Clear any pending interrupts now that F2 is disabled */
2024         w_sdreg32(bus, local_hostintmask,
2025                   offsetof(struct sdpcmd_regs, intstatus));
2026
2027         /* Turn off the backplane clock (only) */
2028         brcmf_sdbrcm_clkctl(bus, CLK_SDONLY, false);
2029         sdio_release_host(bus->sdiodev->func[1]);
2030
2031         /* Clear the data packet queues */
2032         brcmu_pktq_flush(&bus->txq, true, NULL, NULL);
2033
2034         /* Clear any held glomming stuff */
2035         if (bus->glomd)
2036                 brcmu_pkt_buf_free_skb(bus->glomd);
2037         brcmf_sdbrcm_free_glom(bus);
2038
2039         /* Clear rx control and wake any waiters */
2040         spin_lock_bh(&bus->rxctl_lock);
2041         bus->rxlen = 0;
2042         spin_unlock_bh(&bus->rxctl_lock);
2043         brcmf_sdbrcm_dcmd_resp_wake(bus);
2044
2045         /* Reset some F2 state stuff */
2046         bus->rxskip = false;
2047         bus->tx_seq = bus->rx_seq = 0;
2048 }
2049
2050 static inline void brcmf_sdbrcm_clrintr(struct brcmf_sdio *bus)
2051 {
2052         unsigned long flags;
2053
2054         if (bus->sdiodev->oob_irq_requested) {
2055                 spin_lock_irqsave(&bus->sdiodev->irq_en_lock, flags);
2056                 if (!bus->sdiodev->irq_en && !atomic_read(&bus->ipend)) {
2057                         enable_irq(bus->sdiodev->pdata->oob_irq_nr);
2058                         bus->sdiodev->irq_en = true;
2059                 }
2060                 spin_unlock_irqrestore(&bus->sdiodev->irq_en_lock, flags);
2061         }
2062 }
2063
2064 static inline void brcmf_sdbrcm_adddpctsk(struct brcmf_sdio *bus)
2065 {
2066         struct list_head *new_hd;
2067         unsigned long flags;
2068
2069         if (in_interrupt())
2070                 new_hd = kzalloc(sizeof(struct list_head), GFP_ATOMIC);
2071         else
2072                 new_hd = kzalloc(sizeof(struct list_head), GFP_KERNEL);
2073         if (new_hd == NULL)
2074                 return;
2075
2076         spin_lock_irqsave(&bus->dpc_tl_lock, flags);
2077         list_add_tail(new_hd, &bus->dpc_tsklst);
2078         spin_unlock_irqrestore(&bus->dpc_tl_lock, flags);
2079 }
2080
2081 static int brcmf_sdio_intr_rstatus(struct brcmf_sdio *bus)
2082 {
2083         u8 idx;
2084         u32 addr;
2085         unsigned long val;
2086         int n, ret;
2087
2088         idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
2089         addr = bus->ci->c_inf[idx].base +
2090                offsetof(struct sdpcmd_regs, intstatus);
2091
2092         ret = brcmf_sdio_regrw_helper(bus->sdiodev, addr, &val, false);
2093         bus->sdcnt.f1regdata++;
2094         if (ret != 0)
2095                 val = 0;
2096
2097         val &= bus->hostintmask;
2098         atomic_set(&bus->fcstate, !!(val & I_HMB_FC_STATE));
2099
2100         /* Clear interrupts */
2101         if (val) {
2102                 ret = brcmf_sdio_regrw_helper(bus->sdiodev, addr, &val, true);
2103                 bus->sdcnt.f1regdata++;
2104         }
2105
2106         if (ret) {
2107                 atomic_set(&bus->intstatus, 0);
2108         } else if (val) {
2109                 for_each_set_bit(n, &val, 32)
2110                         set_bit(n, (unsigned long *)&bus->intstatus.counter);
2111         }
2112
2113         return ret;
2114 }
2115
2116 static void brcmf_sdbrcm_dpc(struct brcmf_sdio *bus)
2117 {
2118         u32 newstatus = 0;
2119         unsigned long intstatus;
2120         uint rxlimit = bus->rxbound;    /* Rx frames to read before resched */
2121         uint txlimit = bus->txbound;    /* Tx frames to send before resched */
2122         uint framecnt = 0;      /* Temporary counter of tx/rx frames */
2123         int err = 0, n;
2124
2125         brcmf_dbg(TRACE, "Enter\n");
2126
2127         sdio_claim_host(bus->sdiodev->func[1]);
2128
2129         /* If waiting for HTAVAIL, check status */
2130         if (!bus->sr_enabled && bus->clkstate == CLK_PENDING) {
2131                 u8 clkctl, devctl = 0;
2132
2133 #ifdef DEBUG
2134                 /* Check for inconsistent device control */
2135                 devctl = brcmf_sdio_regrb(bus->sdiodev,
2136                                           SBSDIO_DEVICE_CTL, &err);
2137                 if (err) {
2138                         brcmf_err("error reading DEVCTL: %d\n", err);
2139                         bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
2140                 }
2141 #endif                          /* DEBUG */
2142
2143                 /* Read CSR, if clock on switch to AVAIL, else ignore */
2144                 clkctl = brcmf_sdio_regrb(bus->sdiodev,
2145                                           SBSDIO_FUNC1_CHIPCLKCSR, &err);
2146                 if (err) {
2147                         brcmf_err("error reading CSR: %d\n",
2148                                   err);
2149                         bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
2150                 }
2151
2152                 brcmf_dbg(SDIO, "DPC: PENDING, devctl 0x%02x clkctl 0x%02x\n",
2153                           devctl, clkctl);
2154
2155                 if (SBSDIO_HTAV(clkctl)) {
2156                         devctl = brcmf_sdio_regrb(bus->sdiodev,
2157                                                   SBSDIO_DEVICE_CTL, &err);
2158                         if (err) {
2159                                 brcmf_err("error reading DEVCTL: %d\n",
2160                                           err);
2161                                 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
2162                         }
2163                         devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY;
2164                         brcmf_sdio_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
2165                                          devctl, &err);
2166                         if (err) {
2167                                 brcmf_err("error writing DEVCTL: %d\n",
2168                                           err);
2169                                 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
2170                         }
2171                         bus->clkstate = CLK_AVAIL;
2172                 }
2173         }
2174
2175         /* Make sure backplane clock is on */
2176         brcmf_sdbrcm_bus_sleep(bus, false, true);
2177
2178         /* Pending interrupt indicates new device status */
2179         if (atomic_read(&bus->ipend) > 0) {
2180                 atomic_set(&bus->ipend, 0);
2181                 err = brcmf_sdio_intr_rstatus(bus);
2182         }
2183
2184         /* Start with leftover status bits */
2185         intstatus = atomic_xchg(&bus->intstatus, 0);
2186
2187         /* Handle flow-control change: read new state in case our ack
2188          * crossed another change interrupt.  If change still set, assume
2189          * FC ON for safety, let next loop through do the debounce.
2190          */
2191         if (intstatus & I_HMB_FC_CHANGE) {
2192                 intstatus &= ~I_HMB_FC_CHANGE;
2193                 err = w_sdreg32(bus, I_HMB_FC_CHANGE,
2194                                 offsetof(struct sdpcmd_regs, intstatus));
2195
2196                 err = r_sdreg32(bus, &newstatus,
2197                                 offsetof(struct sdpcmd_regs, intstatus));
2198                 bus->sdcnt.f1regdata += 2;
2199                 atomic_set(&bus->fcstate,
2200                            !!(newstatus & (I_HMB_FC_STATE | I_HMB_FC_CHANGE)));
2201                 intstatus |= (newstatus & bus->hostintmask);
2202         }
2203
2204         /* Handle host mailbox indication */
2205         if (intstatus & I_HMB_HOST_INT) {
2206                 intstatus &= ~I_HMB_HOST_INT;
2207                 intstatus |= brcmf_sdbrcm_hostmail(bus);
2208         }
2209
2210         sdio_release_host(bus->sdiodev->func[1]);
2211
2212         /* Generally don't ask for these, can get CRC errors... */
2213         if (intstatus & I_WR_OOSYNC) {
2214                 brcmf_err("Dongle reports WR_OOSYNC\n");
2215                 intstatus &= ~I_WR_OOSYNC;
2216         }
2217
2218         if (intstatus & I_RD_OOSYNC) {
2219                 brcmf_err("Dongle reports RD_OOSYNC\n");
2220                 intstatus &= ~I_RD_OOSYNC;
2221         }
2222
2223         if (intstatus & I_SBINT) {
2224                 brcmf_err("Dongle reports SBINT\n");
2225                 intstatus &= ~I_SBINT;
2226         }
2227
2228         /* Would be active due to wake-wlan in gSPI */
2229         if (intstatus & I_CHIPACTIVE) {
2230                 brcmf_dbg(INFO, "Dongle reports CHIPACTIVE\n");
2231                 intstatus &= ~I_CHIPACTIVE;
2232         }
2233
2234         /* Ignore frame indications if rxskip is set */
2235         if (bus->rxskip)
2236                 intstatus &= ~I_HMB_FRAME_IND;
2237
2238         /* On frame indication, read available frames */
2239         if (PKT_AVAILABLE() && bus->clkstate == CLK_AVAIL) {
2240                 framecnt = brcmf_sdio_readframes(bus, rxlimit);
2241                 if (!bus->rxpending)
2242                         intstatus &= ~I_HMB_FRAME_IND;
2243                 rxlimit -= min(framecnt, rxlimit);
2244         }
2245
2246         /* Keep still-pending events for next scheduling */
2247         if (intstatus) {
2248                 for_each_set_bit(n, &intstatus, 32)
2249                         set_bit(n, (unsigned long *)&bus->intstatus.counter);
2250         }
2251
2252         brcmf_sdbrcm_clrintr(bus);
2253
2254         if (data_ok(bus) && bus->ctrl_frame_stat &&
2255                 (bus->clkstate == CLK_AVAIL)) {
2256                 int i;
2257
2258                 sdio_claim_host(bus->sdiodev->func[1]);
2259                 err = brcmf_sdcard_send_buf(bus->sdiodev, bus->sdiodev->sbwad,
2260                         SDIO_FUNC_2, F2SYNC, bus->ctrl_frame_buf,
2261                         (u32) bus->ctrl_frame_len);
2262
2263                 if (err < 0) {
2264                         /* On failure, abort the command and
2265                                 terminate the frame */
2266                         brcmf_dbg(INFO, "sdio error %d, abort command and terminate frame\n",
2267                                   err);
2268                         bus->sdcnt.tx_sderrs++;
2269
2270                         brcmf_sdcard_abort(bus->sdiodev, SDIO_FUNC_2);
2271
2272                         brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_FRAMECTRL,
2273                                          SFC_WF_TERM, &err);
2274                         bus->sdcnt.f1regdata++;
2275
2276                         for (i = 0; i < 3; i++) {
2277                                 u8 hi, lo;
2278                                 hi = brcmf_sdio_regrb(bus->sdiodev,
2279                                                       SBSDIO_FUNC1_WFRAMEBCHI,
2280                                                       &err);
2281                                 lo = brcmf_sdio_regrb(bus->sdiodev,
2282                                                       SBSDIO_FUNC1_WFRAMEBCLO,
2283                                                       &err);
2284                                 bus->sdcnt.f1regdata += 2;
2285                                 if ((hi == 0) && (lo == 0))
2286                                         break;
2287                         }
2288
2289                 } else {
2290                         bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQUENCE_WRAP;
2291                 }
2292                 sdio_release_host(bus->sdiodev->func[1]);
2293                 bus->ctrl_frame_stat = false;
2294                 brcmf_sdbrcm_wait_event_wakeup(bus);
2295         }
2296         /* Send queued frames (limit 1 if rx may still be pending) */
2297         else if ((bus->clkstate == CLK_AVAIL) && !atomic_read(&bus->fcstate) &&
2298                  brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) && txlimit
2299                  && data_ok(bus)) {
2300                 framecnt = bus->rxpending ? min(txlimit, bus->txminmax) :
2301                                             txlimit;
2302                 framecnt = brcmf_sdbrcm_sendfromq(bus, framecnt);
2303                 txlimit -= framecnt;
2304         }
2305
2306         if ((bus->sdiodev->bus_if->state == BRCMF_BUS_DOWN) || (err != 0)) {
2307                 brcmf_err("failed backplane access over SDIO, halting operation\n");
2308                 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
2309                 atomic_set(&bus->intstatus, 0);
2310         } else if (atomic_read(&bus->intstatus) ||
2311                    atomic_read(&bus->ipend) > 0 ||
2312                    (!atomic_read(&bus->fcstate) &&
2313                     brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) &&
2314                     data_ok(bus)) || PKT_AVAILABLE()) {
2315                 brcmf_sdbrcm_adddpctsk(bus);
2316         }
2317
2318         /* If we're done for now, turn off clock request. */
2319         if ((bus->clkstate != CLK_PENDING)
2320             && bus->idletime == BRCMF_IDLE_IMMEDIATE) {
2321                 bus->activity = false;
2322                 brcmf_dbg(SDIO, "idle state\n");
2323                 sdio_claim_host(bus->sdiodev->func[1]);
2324                 brcmf_sdbrcm_bus_sleep(bus, true, false);
2325                 sdio_release_host(bus->sdiodev->func[1]);
2326         }
2327 }
2328
2329 static struct pktq *brcmf_sdbrcm_bus_gettxq(struct device *dev)
2330 {
2331         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
2332         struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
2333         struct brcmf_sdio *bus = sdiodev->bus;
2334
2335         return &bus->txq;
2336 }
2337
2338 static int brcmf_sdbrcm_bus_txdata(struct device *dev, struct sk_buff *pkt)
2339 {
2340         int ret = -EBADE;
2341         uint datalen, prec;
2342         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
2343         struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
2344         struct brcmf_sdio *bus = sdiodev->bus;
2345         unsigned long flags;
2346
2347         brcmf_dbg(TRACE, "Enter\n");
2348
2349         datalen = pkt->len;
2350
2351         /* Add space for the header */
2352         skb_push(pkt, SDPCM_HDRLEN);
2353         /* precondition: IS_ALIGNED((unsigned long)(pkt->data), 2) */
2354
2355         prec = prio2prec((pkt->priority & PRIOMASK));
2356
2357         /* Check for existing queue, current flow-control,
2358                          pending event, or pending clock */
2359         brcmf_dbg(TRACE, "deferring pktq len %d\n", pktq_len(&bus->txq));
2360         bus->sdcnt.fcqueued++;
2361
2362         /* Priority based enq */
2363         spin_lock_bh(&bus->txqlock);
2364         if (!brcmf_c_prec_enq(bus->sdiodev->dev, &bus->txq, pkt, prec)) {
2365                 skb_pull(pkt, SDPCM_HDRLEN);
2366                 brcmf_txcomplete(bus->sdiodev->dev, pkt, false);
2367                 brcmf_err("out of bus->txq !!!\n");
2368                 ret = -ENOSR;
2369         } else {
2370                 ret = 0;
2371         }
2372         spin_unlock_bh(&bus->txqlock);
2373
2374         if (pktq_len(&bus->txq) >= TXHI) {
2375                 bus->txoff = true;
2376                 brcmf_txflowblock(bus->sdiodev->dev, true);
2377         }
2378
2379 #ifdef DEBUG
2380         if (pktq_plen(&bus->txq, prec) > qcount[prec])
2381                 qcount[prec] = pktq_plen(&bus->txq, prec);
2382 #endif
2383
2384         spin_lock_irqsave(&bus->dpc_tl_lock, flags);
2385         if (list_empty(&bus->dpc_tsklst)) {
2386                 spin_unlock_irqrestore(&bus->dpc_tl_lock, flags);
2387
2388                 brcmf_sdbrcm_adddpctsk(bus);
2389                 queue_work(bus->brcmf_wq, &bus->datawork);
2390         } else {
2391                 spin_unlock_irqrestore(&bus->dpc_tl_lock, flags);
2392         }
2393
2394         return ret;
2395 }
2396
2397 #ifdef DEBUG
2398 #define CONSOLE_LINE_MAX        192
2399
2400 static int brcmf_sdbrcm_readconsole(struct brcmf_sdio *bus)
2401 {
2402         struct brcmf_console *c = &bus->console;
2403         u8 line[CONSOLE_LINE_MAX], ch;
2404         u32 n, idx, addr;
2405         int rv;
2406
2407         /* Don't do anything until FWREADY updates console address */
2408         if (bus->console_addr == 0)
2409                 return 0;
2410
2411         /* Read console log struct */
2412         addr = bus->console_addr + offsetof(struct rte_console, log_le);
2413         rv = brcmf_sdio_ramrw(bus->sdiodev, false, addr, (u8 *)&c->log_le,
2414                               sizeof(c->log_le));
2415         if (rv < 0)
2416                 return rv;
2417
2418         /* Allocate console buffer (one time only) */
2419         if (c->buf == NULL) {
2420                 c->bufsize = le32_to_cpu(c->log_le.buf_size);
2421                 c->buf = kmalloc(c->bufsize, GFP_ATOMIC);
2422                 if (c->buf == NULL)
2423                         return -ENOMEM;
2424         }
2425
2426         idx = le32_to_cpu(c->log_le.idx);
2427
2428         /* Protect against corrupt value */
2429         if (idx > c->bufsize)
2430                 return -EBADE;
2431
2432         /* Skip reading the console buffer if the index pointer
2433          has not moved */
2434         if (idx == c->last)
2435                 return 0;
2436
2437         /* Read the console buffer */
2438         addr = le32_to_cpu(c->log_le.buf);
2439         rv = brcmf_sdio_ramrw(bus->sdiodev, false, addr, c->buf, c->bufsize);
2440         if (rv < 0)
2441                 return rv;
2442
2443         while (c->last != idx) {
2444                 for (n = 0; n < CONSOLE_LINE_MAX - 2; n++) {
2445                         if (c->last == idx) {
2446                                 /* This would output a partial line.
2447                                  * Instead, back up
2448                                  * the buffer pointer and output this
2449                                  * line next time around.
2450                                  */
2451                                 if (c->last >= n)
2452                                         c->last -= n;
2453                                 else
2454                                         c->last = c->bufsize - n;
2455                                 goto break2;
2456                         }
2457                         ch = c->buf[c->last];
2458                         c->last = (c->last + 1) % c->bufsize;
2459                         if (ch == '\n')
2460                                 break;
2461                         line[n] = ch;
2462                 }
2463
2464                 if (n > 0) {
2465                         if (line[n - 1] == '\r')
2466                                 n--;
2467                         line[n] = 0;
2468                         pr_debug("CONSOLE: %s\n", line);
2469                 }
2470         }
2471 break2:
2472
2473         return 0;
2474 }
2475 #endif                          /* DEBUG */
2476
2477 static int brcmf_tx_frame(struct brcmf_sdio *bus, u8 *frame, u16 len)
2478 {
2479         int i;
2480         int ret;
2481
2482         bus->ctrl_frame_stat = false;
2483         ret = brcmf_sdcard_send_buf(bus->sdiodev, bus->sdiodev->sbwad,
2484                                     SDIO_FUNC_2, F2SYNC, frame, len);
2485
2486         if (ret < 0) {
2487                 /* On failure, abort the command and terminate the frame */
2488                 brcmf_dbg(INFO, "sdio error %d, abort command and terminate frame\n",
2489                           ret);
2490                 bus->sdcnt.tx_sderrs++;
2491
2492                 brcmf_sdcard_abort(bus->sdiodev, SDIO_FUNC_2);
2493
2494                 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_FRAMECTRL,
2495                                  SFC_WF_TERM, NULL);
2496                 bus->sdcnt.f1regdata++;
2497
2498                 for (i = 0; i < 3; i++) {
2499                         u8 hi, lo;
2500                         hi = brcmf_sdio_regrb(bus->sdiodev,
2501                                               SBSDIO_FUNC1_WFRAMEBCHI, NULL);
2502                         lo = brcmf_sdio_regrb(bus->sdiodev,
2503                                               SBSDIO_FUNC1_WFRAMEBCLO, NULL);
2504                         bus->sdcnt.f1regdata += 2;
2505                         if (hi == 0 && lo == 0)
2506                                 break;
2507                 }
2508                 return ret;
2509         }
2510
2511         bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQUENCE_WRAP;
2512
2513         return ret;
2514 }
2515
2516 static int
2517 brcmf_sdbrcm_bus_txctl(struct device *dev, unsigned char *msg, uint msglen)
2518 {
2519         u8 *frame;
2520         u16 len;
2521         u32 swheader;
2522         uint retries = 0;
2523         u8 doff = 0;
2524         int ret = -1;
2525         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
2526         struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
2527         struct brcmf_sdio *bus = sdiodev->bus;
2528         unsigned long flags;
2529
2530         brcmf_dbg(TRACE, "Enter\n");
2531
2532         /* Back the pointer to make a room for bus header */
2533         frame = msg - SDPCM_HDRLEN;
2534         len = (msglen += SDPCM_HDRLEN);
2535
2536         /* Add alignment padding (optional for ctl frames) */
2537         doff = ((unsigned long)frame % BRCMF_SDALIGN);
2538         if (doff) {
2539                 frame -= doff;
2540                 len += doff;
2541                 msglen += doff;
2542                 memset(frame, 0, doff + SDPCM_HDRLEN);
2543         }
2544         /* precondition: doff < BRCMF_SDALIGN */
2545         doff += SDPCM_HDRLEN;
2546
2547         /* Round send length to next SDIO block */
2548         if (bus->roundup && bus->blocksize && (len > bus->blocksize)) {
2549                 u16 pad = bus->blocksize - (len % bus->blocksize);
2550                 if ((pad <= bus->roundup) && (pad < bus->blocksize))
2551                         len += pad;
2552         } else if (len % BRCMF_SDALIGN) {
2553                 len += BRCMF_SDALIGN - (len % BRCMF_SDALIGN);
2554         }
2555
2556         /* Satisfy length-alignment requirements */
2557         if (len & (ALIGNMENT - 1))
2558                 len = roundup(len, ALIGNMENT);
2559
2560         /* precondition: IS_ALIGNED((unsigned long)frame, 2) */
2561
2562         /* Make sure backplane clock is on */
2563         sdio_claim_host(bus->sdiodev->func[1]);
2564         brcmf_sdbrcm_bus_sleep(bus, false, false);
2565         sdio_release_host(bus->sdiodev->func[1]);
2566
2567         /* Hardware tag: 2 byte len followed by 2 byte ~len check (all LE) */
2568         *(__le16 *) frame = cpu_to_le16((u16) msglen);
2569         *(((__le16 *) frame) + 1) = cpu_to_le16(~msglen);
2570
2571         /* Software tag: channel, sequence number, data offset */
2572         swheader =
2573             ((SDPCM_CONTROL_CHANNEL << SDPCM_CHANNEL_SHIFT) &
2574              SDPCM_CHANNEL_MASK)
2575             | bus->tx_seq | ((doff << SDPCM_DOFFSET_SHIFT) &
2576                              SDPCM_DOFFSET_MASK);
2577         put_unaligned_le32(swheader, frame + SDPCM_FRAMETAG_LEN);
2578         put_unaligned_le32(0, frame + SDPCM_FRAMETAG_LEN + sizeof(swheader));
2579
2580         if (!data_ok(bus)) {
2581                 brcmf_dbg(INFO, "No bus credit bus->tx_max %d, bus->tx_seq %d\n",
2582                           bus->tx_max, bus->tx_seq);
2583                 bus->ctrl_frame_stat = true;
2584                 /* Send from dpc */
2585                 bus->ctrl_frame_buf = frame;
2586                 bus->ctrl_frame_len = len;
2587
2588                 wait_event_interruptible_timeout(bus->ctrl_wait,
2589                                                  !bus->ctrl_frame_stat,
2590                                                  msecs_to_jiffies(2000));
2591
2592                 if (!bus->ctrl_frame_stat) {
2593                         brcmf_dbg(SDIO, "ctrl_frame_stat == false\n");
2594                         ret = 0;
2595                 } else {
2596                         brcmf_dbg(SDIO, "ctrl_frame_stat == true\n");
2597                         ret = -1;
2598                 }
2599         }
2600
2601         if (ret == -1) {
2602                 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_CTL_ON(),
2603                                    frame, len, "Tx Frame:\n");
2604                 brcmf_dbg_hex_dump(!(BRCMF_BYTES_ON() && BRCMF_CTL_ON()) &&
2605                                    BRCMF_HDRS_ON(),
2606                                    frame, min_t(u16, len, 16), "TxHdr:\n");
2607
2608                 do {
2609                         sdio_claim_host(bus->sdiodev->func[1]);
2610                         ret = brcmf_tx_frame(bus, frame, len);
2611                         sdio_release_host(bus->sdiodev->func[1]);
2612                 } while (ret < 0 && retries++ < TXRETRIES);
2613         }
2614
2615         spin_lock_irqsave(&bus->dpc_tl_lock, flags);
2616         if ((bus->idletime == BRCMF_IDLE_IMMEDIATE) &&
2617             list_empty(&bus->dpc_tsklst)) {
2618                 spin_unlock_irqrestore(&bus->dpc_tl_lock, flags);
2619
2620                 bus->activity = false;
2621                 sdio_claim_host(bus->sdiodev->func[1]);
2622                 brcmf_dbg(INFO, "idle\n");
2623                 brcmf_sdbrcm_clkctl(bus, CLK_NONE, true);
2624                 sdio_release_host(bus->sdiodev->func[1]);
2625         } else {
2626                 spin_unlock_irqrestore(&bus->dpc_tl_lock, flags);
2627         }
2628
2629         if (ret)
2630                 bus->sdcnt.tx_ctlerrs++;
2631         else
2632                 bus->sdcnt.tx_ctlpkts++;
2633
2634         return ret ? -EIO : 0;
2635 }
2636
2637 #ifdef DEBUG
2638 static inline bool brcmf_sdio_valid_shared_address(u32 addr)
2639 {
2640         return !(addr == 0 || ((~addr >> 16) & 0xffff) == (addr & 0xffff));
2641 }
2642
2643 static int brcmf_sdio_readshared(struct brcmf_sdio *bus,
2644                                  struct sdpcm_shared *sh)
2645 {
2646         u32 addr;
2647         int rv;
2648         u32 shaddr = 0;
2649         struct sdpcm_shared_le sh_le;
2650         __le32 addr_le;
2651
2652         shaddr = bus->ci->rambase + bus->ramsize - 4;
2653
2654         /*
2655          * Read last word in socram to determine
2656          * address of sdpcm_shared structure
2657          */
2658         sdio_claim_host(bus->sdiodev->func[1]);
2659         brcmf_sdbrcm_bus_sleep(bus, false, false);
2660         rv = brcmf_sdio_ramrw(bus->sdiodev, false, shaddr, (u8 *)&addr_le, 4);
2661         sdio_release_host(bus->sdiodev->func[1]);
2662         if (rv < 0)
2663                 return rv;
2664
2665         addr = le32_to_cpu(addr_le);
2666
2667         brcmf_dbg(SDIO, "sdpcm_shared address 0x%08X\n", addr);
2668
2669         /*
2670          * Check if addr is valid.
2671          * NVRAM length at the end of memory should have been overwritten.
2672          */
2673         if (!brcmf_sdio_valid_shared_address(addr)) {
2674                         brcmf_err("invalid sdpcm_shared address 0x%08X\n",
2675                                   addr);
2676                         return -EINVAL;
2677         }
2678
2679         /* Read hndrte_shared structure */
2680         rv = brcmf_sdio_ramrw(bus->sdiodev, false, addr, (u8 *)&sh_le,
2681                               sizeof(struct sdpcm_shared_le));
2682         if (rv < 0)
2683                 return rv;
2684
2685         /* Endianness */
2686         sh->flags = le32_to_cpu(sh_le.flags);
2687         sh->trap_addr = le32_to_cpu(sh_le.trap_addr);
2688         sh->assert_exp_addr = le32_to_cpu(sh_le.assert_exp_addr);
2689         sh->assert_file_addr = le32_to_cpu(sh_le.assert_file_addr);
2690         sh->assert_line = le32_to_cpu(sh_le.assert_line);
2691         sh->console_addr = le32_to_cpu(sh_le.console_addr);
2692         sh->msgtrace_addr = le32_to_cpu(sh_le.msgtrace_addr);
2693
2694         if ((sh->flags & SDPCM_SHARED_VERSION_MASK) > SDPCM_SHARED_VERSION) {
2695                 brcmf_err("sdpcm shared version unsupported: dhd %d dongle %d\n",
2696                           SDPCM_SHARED_VERSION,
2697                           sh->flags & SDPCM_SHARED_VERSION_MASK);
2698                 return -EPROTO;
2699         }
2700
2701         return 0;
2702 }
2703
2704 static int brcmf_sdio_dump_console(struct brcmf_sdio *bus,
2705                                    struct sdpcm_shared *sh, char __user *data,
2706                                    size_t count)
2707 {
2708         u32 addr, console_ptr, console_size, console_index;
2709         char *conbuf = NULL;
2710         __le32 sh_val;
2711         int rv;
2712         loff_t pos = 0;
2713         int nbytes = 0;
2714
2715         /* obtain console information from device memory */
2716         addr = sh->console_addr + offsetof(struct rte_console, log_le);
2717         rv = brcmf_sdio_ramrw(bus->sdiodev, false, addr,
2718                               (u8 *)&sh_val, sizeof(u32));
2719         if (rv < 0)
2720                 return rv;
2721         console_ptr = le32_to_cpu(sh_val);
2722
2723         addr = sh->console_addr + offsetof(struct rte_console, log_le.buf_size);
2724         rv = brcmf_sdio_ramrw(bus->sdiodev, false, addr,
2725                               (u8 *)&sh_val, sizeof(u32));
2726         if (rv < 0)
2727                 return rv;
2728         console_size = le32_to_cpu(sh_val);
2729
2730         addr = sh->console_addr + offsetof(struct rte_console, log_le.idx);
2731         rv = brcmf_sdio_ramrw(bus->sdiodev, false, addr,
2732                               (u8 *)&sh_val, sizeof(u32));
2733         if (rv < 0)
2734                 return rv;
2735         console_index = le32_to_cpu(sh_val);
2736
2737         /* allocate buffer for console data */
2738         if (console_size <= CONSOLE_BUFFER_MAX)
2739                 conbuf = vzalloc(console_size+1);
2740
2741         if (!conbuf)
2742                 return -ENOMEM;
2743
2744         /* obtain the console data from device */
2745         conbuf[console_size] = '\0';
2746         rv = brcmf_sdio_ramrw(bus->sdiodev, false, console_ptr, (u8 *)conbuf,
2747                               console_size);
2748         if (rv < 0)
2749                 goto done;
2750
2751         rv = simple_read_from_buffer(data, count, &pos,
2752                                      conbuf + console_index,
2753                                      console_size - console_index);
2754         if (rv < 0)
2755                 goto done;
2756
2757         nbytes = rv;
2758         if (console_index > 0) {
2759                 pos = 0;
2760                 rv = simple_read_from_buffer(data+nbytes, count, &pos,
2761                                              conbuf, console_index - 1);
2762                 if (rv < 0)
2763                         goto done;
2764                 rv += nbytes;
2765         }
2766 done:
2767         vfree(conbuf);
2768         return rv;
2769 }
2770
2771 static int brcmf_sdio_trap_info(struct brcmf_sdio *bus, struct sdpcm_shared *sh,
2772                                 char __user *data, size_t count)
2773 {
2774         int error, res;
2775         char buf[350];
2776         struct brcmf_trap_info tr;
2777         loff_t pos = 0;
2778
2779         if ((sh->flags & SDPCM_SHARED_TRAP) == 0) {
2780                 brcmf_dbg(INFO, "no trap in firmware\n");
2781                 return 0;
2782         }
2783
2784         error = brcmf_sdio_ramrw(bus->sdiodev, false, sh->trap_addr, (u8 *)&tr,
2785                                  sizeof(struct brcmf_trap_info));
2786         if (error < 0)
2787                 return error;
2788
2789         res = scnprintf(buf, sizeof(buf),
2790                         "dongle trap info: type 0x%x @ epc 0x%08x\n"
2791                         "  cpsr 0x%08x spsr 0x%08x sp 0x%08x\n"
2792                         "  lr   0x%08x pc   0x%08x offset 0x%x\n"
2793                         "  r0   0x%08x r1   0x%08x r2 0x%08x r3 0x%08x\n"
2794                         "  r4   0x%08x r5   0x%08x r6 0x%08x r7 0x%08x\n",
2795                         le32_to_cpu(tr.type), le32_to_cpu(tr.epc),
2796                         le32_to_cpu(tr.cpsr), le32_to_cpu(tr.spsr),
2797                         le32_to_cpu(tr.r13), le32_to_cpu(tr.r14),
2798                         le32_to_cpu(tr.pc), sh->trap_addr,
2799                         le32_to_cpu(tr.r0), le32_to_cpu(tr.r1),
2800                         le32_to_cpu(tr.r2), le32_to_cpu(tr.r3),
2801                         le32_to_cpu(tr.r4), le32_to_cpu(tr.r5),
2802                         le32_to_cpu(tr.r6), le32_to_cpu(tr.r7));
2803
2804         return simple_read_from_buffer(data, count, &pos, buf, res);
2805 }
2806
2807 static int brcmf_sdio_assert_info(struct brcmf_sdio *bus,
2808                                   struct sdpcm_shared *sh, char __user *data,
2809                                   size_t count)
2810 {
2811         int error = 0;
2812         char buf[200];
2813         char file[80] = "?";
2814         char expr[80] = "<???>";
2815         int res;
2816         loff_t pos = 0;
2817
2818         if ((sh->flags & SDPCM_SHARED_ASSERT_BUILT) == 0) {
2819                 brcmf_dbg(INFO, "firmware not built with -assert\n");
2820                 return 0;
2821         } else if ((sh->flags & SDPCM_SHARED_ASSERT) == 0) {
2822                 brcmf_dbg(INFO, "no assert in dongle\n");
2823                 return 0;
2824         }
2825
2826         sdio_claim_host(bus->sdiodev->func[1]);
2827         if (sh->assert_file_addr != 0) {
2828                 error = brcmf_sdio_ramrw(bus->sdiodev, false,
2829                                          sh->assert_file_addr, (u8 *)file, 80);
2830                 if (error < 0)
2831                         return error;
2832         }
2833         if (sh->assert_exp_addr != 0) {
2834                 error = brcmf_sdio_ramrw(bus->sdiodev, false,
2835                                          sh->assert_exp_addr, (u8 *)expr, 80);
2836                 if (error < 0)
2837                         return error;
2838         }
2839         sdio_release_host(bus->sdiodev->func[1]);
2840
2841         res = scnprintf(buf, sizeof(buf),
2842                         "dongle assert: %s:%d: assert(%s)\n",
2843                         file, sh->assert_line, expr);
2844         return simple_read_from_buffer(data, count, &pos, buf, res);
2845 }
2846
2847 static int brcmf_sdbrcm_checkdied(struct brcmf_sdio *bus)
2848 {
2849         int error;
2850         struct sdpcm_shared sh;
2851
2852         error = brcmf_sdio_readshared(bus, &sh);
2853
2854         if (error < 0)
2855                 return error;
2856
2857         if ((sh.flags & SDPCM_SHARED_ASSERT_BUILT) == 0)
2858                 brcmf_dbg(INFO, "firmware not built with -assert\n");
2859         else if (sh.flags & SDPCM_SHARED_ASSERT)
2860                 brcmf_err("assertion in dongle\n");
2861
2862         if (sh.flags & SDPCM_SHARED_TRAP)
2863                 brcmf_err("firmware trap in dongle\n");
2864
2865         return 0;
2866 }
2867
2868 static int brcmf_sdbrcm_died_dump(struct brcmf_sdio *bus, char __user *data,
2869                                   size_t count, loff_t *ppos)
2870 {
2871         int error = 0;
2872         struct sdpcm_shared sh;
2873         int nbytes = 0;
2874         loff_t pos = *ppos;
2875
2876         if (pos != 0)
2877                 return 0;
2878
2879         error = brcmf_sdio_readshared(bus, &sh);
2880         if (error < 0)
2881                 goto done;
2882
2883         error = brcmf_sdio_assert_info(bus, &sh, data, count);
2884         if (error < 0)
2885                 goto done;
2886         nbytes = error;
2887
2888         error = brcmf_sdio_trap_info(bus, &sh, data+nbytes, count);
2889         if (error < 0)
2890                 goto done;
2891         nbytes += error;
2892
2893         error = brcmf_sdio_dump_console(bus, &sh, data+nbytes, count);
2894         if (error < 0)
2895                 goto done;
2896         nbytes += error;
2897
2898         error = nbytes;
2899         *ppos += nbytes;
2900 done:
2901         return error;
2902 }
2903
2904 static ssize_t brcmf_sdio_forensic_read(struct file *f, char __user *data,
2905                                         size_t count, loff_t *ppos)
2906 {
2907         struct brcmf_sdio *bus = f->private_data;
2908         int res;
2909
2910         res = brcmf_sdbrcm_died_dump(bus, data, count, ppos);
2911         if (res > 0)
2912                 *ppos += res;
2913         return (ssize_t)res;
2914 }
2915
2916 static const struct file_operations brcmf_sdio_forensic_ops = {
2917         .owner = THIS_MODULE,
2918         .open = simple_open,
2919         .read = brcmf_sdio_forensic_read
2920 };
2921
2922 static void brcmf_sdio_debugfs_create(struct brcmf_sdio *bus)
2923 {
2924         struct brcmf_pub *drvr = bus->sdiodev->bus_if->drvr;
2925         struct dentry *dentry = brcmf_debugfs_get_devdir(drvr);
2926
2927         if (IS_ERR_OR_NULL(dentry))
2928                 return;
2929
2930         debugfs_create_file("forensics", S_IRUGO, dentry, bus,
2931                             &brcmf_sdio_forensic_ops);
2932         brcmf_debugfs_create_sdio_count(drvr, &bus->sdcnt);
2933 }
2934 #else
2935 static int brcmf_sdbrcm_checkdied(struct brcmf_sdio *bus)
2936 {
2937         return 0;
2938 }
2939
2940 static void brcmf_sdio_debugfs_create(struct brcmf_sdio *bus)
2941 {
2942 }
2943 #endif /* DEBUG */
2944
2945 static int
2946 brcmf_sdbrcm_bus_rxctl(struct device *dev, unsigned char *msg, uint msglen)
2947 {
2948         int timeleft;
2949         uint rxlen = 0;
2950         bool pending;
2951         u8 *buf;
2952         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
2953         struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
2954         struct brcmf_sdio *bus = sdiodev->bus;
2955
2956         brcmf_dbg(TRACE, "Enter\n");
2957
2958         /* Wait until control frame is available */
2959         timeleft = brcmf_sdbrcm_dcmd_resp_wait(bus, &bus->rxlen, &pending);
2960
2961         spin_lock_bh(&bus->rxctl_lock);
2962         rxlen = bus->rxlen;
2963         memcpy(msg, bus->rxctl, min(msglen, rxlen));
2964         bus->rxctl = NULL;
2965         buf = bus->rxctl_orig;
2966         bus->rxctl_orig = NULL;
2967         bus->rxlen = 0;
2968         spin_unlock_bh(&bus->rxctl_lock);
2969         vfree(buf);
2970
2971         if (rxlen) {
2972                 brcmf_dbg(CTL, "resumed on rxctl frame, got %d expected %d\n",
2973                           rxlen, msglen);
2974         } else if (timeleft == 0) {
2975                 brcmf_err("resumed on timeout\n");
2976                 brcmf_sdbrcm_checkdied(bus);
2977         } else if (pending) {
2978                 brcmf_dbg(CTL, "cancelled\n");
2979                 return -ERESTARTSYS;
2980         } else {
2981                 brcmf_dbg(CTL, "resumed for unknown reason?\n");
2982                 brcmf_sdbrcm_checkdied(bus);
2983         }
2984
2985         if (rxlen)
2986                 bus->sdcnt.rx_ctlpkts++;
2987         else
2988                 bus->sdcnt.rx_ctlerrs++;
2989
2990         return rxlen ? (int)rxlen : -ETIMEDOUT;
2991 }
2992
2993 static bool brcmf_sdbrcm_download_state(struct brcmf_sdio *bus, bool enter)
2994 {
2995         struct chip_info *ci = bus->ci;
2996
2997         /* To enter download state, disable ARM and reset SOCRAM.
2998          * To exit download state, simply reset ARM (default is RAM boot).
2999          */
3000         if (enter) {
3001                 bus->alp_only = true;
3002
3003                 brcmf_sdio_chip_enter_download(bus->sdiodev, ci);
3004         } else {
3005                 if (!brcmf_sdio_chip_exit_download(bus->sdiodev, ci, bus->vars,
3006                                                    bus->varsz))
3007                         return false;
3008
3009                 /* Allow HT Clock now that the ARM is running. */
3010                 bus->alp_only = false;
3011
3012                 bus->sdiodev->bus_if->state = BRCMF_BUS_LOAD;
3013         }
3014
3015         return true;
3016 }
3017
3018 static int brcmf_sdbrcm_get_image(char *buf, int len, struct brcmf_sdio *bus)
3019 {
3020         if (bus->firmware->size < bus->fw_ptr + len)
3021                 len = bus->firmware->size - bus->fw_ptr;
3022
3023         memcpy(buf, &bus->firmware->data[bus->fw_ptr], len);
3024         bus->fw_ptr += len;
3025         return len;
3026 }
3027
3028 static int brcmf_sdbrcm_download_code_file(struct brcmf_sdio *bus)
3029 {
3030         int offset;
3031         uint len;
3032         u8 *memblock = NULL, *memptr;
3033         int ret;
3034         u8 idx;
3035
3036         brcmf_dbg(INFO, "Enter\n");
3037
3038         ret = request_firmware(&bus->firmware, BRCMF_SDIO_FW_NAME,
3039                                &bus->sdiodev->func[2]->dev);
3040         if (ret) {
3041                 brcmf_err("Fail to request firmware %d\n", ret);
3042                 return ret;
3043         }
3044         bus->fw_ptr = 0;
3045
3046         memptr = memblock = kmalloc(MEMBLOCK + BRCMF_SDALIGN, GFP_ATOMIC);
3047         if (memblock == NULL) {
3048                 ret = -ENOMEM;
3049                 goto err;
3050         }
3051         if ((u32)(unsigned long)memblock % BRCMF_SDALIGN)
3052                 memptr += (BRCMF_SDALIGN -
3053                            ((u32)(unsigned long)memblock % BRCMF_SDALIGN));
3054
3055         offset = bus->ci->rambase;
3056
3057         /* Download image */
3058         len = brcmf_sdbrcm_get_image((char *)memptr, MEMBLOCK, bus);
3059         idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_ARM_CR4);
3060         if (BRCMF_MAX_CORENUM != idx)
3061                 memcpy(&bus->ci->rst_vec, memptr, sizeof(bus->ci->rst_vec));
3062         while (len) {
3063                 ret = brcmf_sdio_ramrw(bus->sdiodev, true, offset, memptr, len);
3064                 if (ret) {
3065                         brcmf_err("error %d on writing %d membytes at 0x%08x\n",
3066                                   ret, MEMBLOCK, offset);
3067                         goto err;
3068                 }
3069
3070                 offset += MEMBLOCK;
3071                 len = brcmf_sdbrcm_get_image((char *)memptr, MEMBLOCK, bus);
3072         }
3073
3074 err:
3075         kfree(memblock);
3076
3077         release_firmware(bus->firmware);
3078         bus->fw_ptr = 0;
3079
3080         return ret;
3081 }
3082
3083 /*
3084  * ProcessVars:Takes a buffer of "<var>=<value>\n" lines read from a file
3085  * and ending in a NUL.
3086  * Removes carriage returns, empty lines, comment lines, and converts
3087  * newlines to NULs.
3088  * Shortens buffer as needed and pads with NULs.  End of buffer is marked
3089  * by two NULs.
3090 */
3091
3092 static int brcmf_process_nvram_vars(struct brcmf_sdio *bus)
3093 {
3094         char *varbuf;
3095         char *dp;
3096         bool findNewline;
3097         int column;
3098         int ret = 0;
3099         uint buf_len, n, len;
3100
3101         len = bus->firmware->size;
3102         varbuf = vmalloc(len);
3103         if (!varbuf)
3104                 return -ENOMEM;
3105
3106         memcpy(varbuf, bus->firmware->data, len);
3107         dp = varbuf;
3108
3109         findNewline = false;
3110         column = 0;
3111
3112         for (n = 0; n < len; n++) {
3113                 if (varbuf[n] == 0)
3114                         break;
3115                 if (varbuf[n] == '\r')
3116                         continue;
3117                 if (findNewline && varbuf[n] != '\n')
3118                         continue;
3119                 findNewline = false;
3120                 if (varbuf[n] == '#') {
3121                         findNewline = true;
3122                         continue;
3123                 }
3124                 if (varbuf[n] == '\n') {
3125                         if (column == 0)
3126                                 continue;
3127                         *dp++ = 0;
3128                         column = 0;
3129                         continue;
3130                 }
3131                 *dp++ = varbuf[n];
3132                 column++;
3133         }
3134         buf_len = dp - varbuf;
3135         while (dp < varbuf + n)
3136                 *dp++ = 0;
3137
3138         kfree(bus->vars);
3139         /* roundup needed for download to device */
3140         bus->varsz = roundup(buf_len + 1, 4);
3141         bus->vars = kmalloc(bus->varsz, GFP_KERNEL);
3142         if (bus->vars == NULL) {
3143                 bus->varsz = 0;
3144                 ret = -ENOMEM;
3145                 goto err;
3146         }
3147
3148         /* copy the processed variables and add null termination */
3149         memcpy(bus->vars, varbuf, buf_len);
3150         bus->vars[buf_len] = 0;
3151 err:
3152         vfree(varbuf);
3153         return ret;
3154 }
3155
3156 static int brcmf_sdbrcm_download_nvram(struct brcmf_sdio *bus)
3157 {
3158         int ret;
3159
3160         ret = request_firmware(&bus->firmware, BRCMF_SDIO_NV_NAME,
3161                                &bus->sdiodev->func[2]->dev);
3162         if (ret) {
3163                 brcmf_err("Fail to request nvram %d\n", ret);
3164                 return ret;
3165         }
3166
3167         ret = brcmf_process_nvram_vars(bus);
3168
3169         release_firmware(bus->firmware);
3170
3171         return ret;
3172 }
3173
3174 static int _brcmf_sdbrcm_download_firmware(struct brcmf_sdio *bus)
3175 {
3176         int bcmerror = -1;
3177
3178         /* Keep arm in reset */
3179         if (!brcmf_sdbrcm_download_state(bus, true)) {
3180                 brcmf_err("error placing ARM core in reset\n");
3181                 goto err;
3182         }
3183
3184         if (brcmf_sdbrcm_download_code_file(bus)) {
3185                 brcmf_err("dongle image file download failed\n");
3186                 goto err;
3187         }
3188
3189         if (brcmf_sdbrcm_download_nvram(bus)) {
3190                 brcmf_err("dongle nvram file download failed\n");
3191                 goto err;
3192         }
3193
3194         /* Take arm out of reset */
3195         if (!brcmf_sdbrcm_download_state(bus, false)) {
3196                 brcmf_err("error getting out of ARM core reset\n");
3197                 goto err;
3198         }
3199
3200         bcmerror = 0;
3201
3202 err:
3203         return bcmerror;
3204 }
3205
3206 static bool brcmf_sdbrcm_sr_capable(struct brcmf_sdio *bus)
3207 {
3208         u32 addr, reg;
3209
3210         brcmf_dbg(TRACE, "Enter\n");
3211
3212         /* old chips with PMU version less than 17 don't support save restore */
3213         if (bus->ci->pmurev < 17)
3214                 return false;
3215
3216         /* read PMU chipcontrol register 3*/
3217         addr = CORE_CC_REG(bus->ci->c_inf[0].base, chipcontrol_addr);
3218         brcmf_sdio_regwl(bus->sdiodev, addr, 3, NULL);
3219         addr = CORE_CC_REG(bus->ci->c_inf[0].base, chipcontrol_data);
3220         reg = brcmf_sdio_regrl(bus->sdiodev, addr, NULL);
3221
3222         return (bool)reg;
3223 }
3224
3225 static void brcmf_sdbrcm_sr_init(struct brcmf_sdio *bus)
3226 {
3227         int err = 0;
3228         u8 val;
3229
3230         brcmf_dbg(TRACE, "Enter\n");
3231
3232         val = brcmf_sdio_regrb(bus->sdiodev, SBSDIO_FUNC1_WAKEUPCTRL,
3233                                &err);
3234         if (err) {
3235                 brcmf_err("error reading SBSDIO_FUNC1_WAKEUPCTRL\n");
3236                 return;
3237         }
3238
3239         val |= 1 << SBSDIO_FUNC1_WCTRL_HTWAIT_SHIFT;
3240         brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_WAKEUPCTRL,
3241                          val, &err);
3242         if (err) {
3243                 brcmf_err("error writing SBSDIO_FUNC1_WAKEUPCTRL\n");
3244                 return;
3245         }
3246
3247         /* Add CMD14 Support */
3248         brcmf_sdio_regwb(bus->sdiodev, SDIO_CCCR_BRCM_CARDCAP,
3249                          (SDIO_CCCR_BRCM_CARDCAP_CMD14_SUPPORT |
3250                           SDIO_CCCR_BRCM_CARDCAP_CMD14_EXT),
3251                          &err);
3252         if (err) {
3253                 brcmf_err("error writing SDIO_CCCR_BRCM_CARDCAP\n");
3254                 return;
3255         }
3256
3257         brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
3258                          SBSDIO_FORCE_HT, &err);
3259         if (err) {
3260                 brcmf_err("error writing SBSDIO_FUNC1_CHIPCLKCSR\n");
3261                 return;
3262         }
3263
3264         /* set flag */
3265         bus->sr_enabled = true;
3266         brcmf_dbg(INFO, "SR enabled\n");
3267 }
3268
3269 /* enable KSO bit */
3270 static int brcmf_sdbrcm_kso_init(struct brcmf_sdio *bus)
3271 {
3272         u8 val;
3273         int err = 0;
3274
3275         brcmf_dbg(TRACE, "Enter\n");
3276
3277         /* KSO bit added in SDIO core rev 12 */
3278         if (bus->ci->c_inf[1].rev < 12)
3279                 return 0;
3280
3281         val = brcmf_sdio_regrb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR,
3282                                &err);
3283         if (err) {
3284                 brcmf_err("error reading SBSDIO_FUNC1_SLEEPCSR\n");
3285                 return err;
3286         }
3287
3288         if (!(val & SBSDIO_FUNC1_SLEEPCSR_KSO_MASK)) {
3289                 val |= (SBSDIO_FUNC1_SLEEPCSR_KSO_EN <<
3290                         SBSDIO_FUNC1_SLEEPCSR_KSO_SHIFT);
3291                 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_SLEEPCSR,
3292                                  val, &err);
3293                 if (err) {
3294                         brcmf_err("error writing SBSDIO_FUNC1_SLEEPCSR\n");
3295                         return err;
3296                 }
3297         }
3298
3299         return 0;
3300 }
3301
3302
3303 static bool
3304 brcmf_sdbrcm_download_firmware(struct brcmf_sdio *bus)
3305 {
3306         bool ret;
3307
3308         sdio_claim_host(bus->sdiodev->func[1]);
3309
3310         brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
3311
3312         ret = _brcmf_sdbrcm_download_firmware(bus) == 0;
3313
3314         brcmf_sdbrcm_clkctl(bus, CLK_SDONLY, false);
3315
3316         sdio_release_host(bus->sdiodev->func[1]);
3317
3318         return ret;
3319 }
3320
3321 static int brcmf_sdbrcm_bus_init(struct device *dev)
3322 {
3323         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
3324         struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
3325         struct brcmf_sdio *bus = sdiodev->bus;
3326         unsigned long timeout;
3327         u8 ready, enable;
3328         int err, ret = 0;
3329         u8 saveclk;
3330
3331         brcmf_dbg(TRACE, "Enter\n");
3332
3333         /* try to download image and nvram to the dongle */
3334         if (bus_if->state == BRCMF_BUS_DOWN) {
3335                 if (!(brcmf_sdbrcm_download_firmware(bus)))
3336                         return -1;
3337         }
3338
3339         if (!bus->sdiodev->bus_if->drvr)
3340                 return 0;
3341
3342         /* Start the watchdog timer */
3343         bus->sdcnt.tickcnt = 0;
3344         brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS);
3345
3346         sdio_claim_host(bus->sdiodev->func[1]);
3347
3348         /* Make sure backplane clock is on, needed to generate F2 interrupt */
3349         brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
3350         if (bus->clkstate != CLK_AVAIL)
3351                 goto exit;
3352
3353         /* Force clocks on backplane to be sure F2 interrupt propagates */
3354         saveclk = brcmf_sdio_regrb(bus->sdiodev,
3355                                    SBSDIO_FUNC1_CHIPCLKCSR, &err);
3356         if (!err) {
3357                 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
3358                                  (saveclk | SBSDIO_FORCE_HT), &err);
3359         }
3360         if (err) {
3361                 brcmf_err("Failed to force clock for F2: err %d\n", err);
3362                 goto exit;
3363         }
3364
3365         /* Enable function 2 (frame transfers) */
3366         w_sdreg32(bus, SDPCM_PROT_VERSION << SMB_DATA_VERSION_SHIFT,
3367                   offsetof(struct sdpcmd_regs, tosbmailboxdata));
3368         enable = (SDIO_FUNC_ENABLE_1 | SDIO_FUNC_ENABLE_2);
3369
3370         brcmf_sdio_regwb(bus->sdiodev, SDIO_CCCR_IOEx, enable, NULL);
3371
3372         timeout = jiffies + msecs_to_jiffies(BRCMF_WAIT_F2RDY);
3373         ready = 0;
3374         while (enable != ready) {
3375                 ready = brcmf_sdio_regrb(bus->sdiodev,
3376                                          SDIO_CCCR_IORx, NULL);
3377                 if (time_after(jiffies, timeout))
3378                         break;
3379                 else if (time_after(jiffies, timeout - BRCMF_WAIT_F2RDY + 50))
3380                         /* prevent busy waiting if it takes too long */
3381                         msleep_interruptible(20);
3382         }
3383
3384         brcmf_dbg(INFO, "enable 0x%02x, ready 0x%02x\n", enable, ready);
3385
3386         /* If F2 successfully enabled, set core and enable interrupts */
3387         if (ready == enable) {
3388                 /* Set up the interrupt mask and enable interrupts */
3389                 bus->hostintmask = HOSTINTMASK;
3390                 w_sdreg32(bus, bus->hostintmask,
3391                           offsetof(struct sdpcmd_regs, hostintmask));
3392
3393                 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_WATERMARK, 8, &err);
3394         } else {
3395                 /* Disable F2 again */
3396                 enable = SDIO_FUNC_ENABLE_1;
3397                 brcmf_sdio_regwb(bus->sdiodev, SDIO_CCCR_IOEx, enable, NULL);
3398                 ret = -ENODEV;
3399         }
3400
3401         if (brcmf_sdbrcm_sr_capable(bus)) {
3402                 brcmf_sdbrcm_sr_init(bus);
3403         } else {
3404                 /* Restore previous clock setting */
3405                 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
3406                                  saveclk, &err);
3407         }
3408
3409         if (ret == 0) {
3410                 ret = brcmf_sdio_intr_register(bus->sdiodev);
3411                 if (ret != 0)
3412                         brcmf_err("intr register failed:%d\n", ret);
3413         }
3414
3415         /* If we didn't come up, turn off backplane clock */
3416         if (bus_if->state != BRCMF_BUS_DATA)
3417                 brcmf_sdbrcm_clkctl(bus, CLK_NONE, false);
3418
3419 exit:
3420         sdio_release_host(bus->sdiodev->func[1]);
3421
3422         return ret;
3423 }
3424
3425 void brcmf_sdbrcm_isr(void *arg)
3426 {
3427         struct brcmf_sdio *bus = (struct brcmf_sdio *) arg;
3428
3429         brcmf_dbg(TRACE, "Enter\n");
3430
3431         if (!bus) {
3432                 brcmf_err("bus is null pointer, exiting\n");
3433                 return;
3434         }
3435
3436         if (bus->sdiodev->bus_if->state == BRCMF_BUS_DOWN) {
3437                 brcmf_err("bus is down. we have nothing to do\n");
3438                 return;
3439         }
3440         /* Count the interrupt call */
3441         bus->sdcnt.intrcount++;
3442         if (in_interrupt())
3443                 atomic_set(&bus->ipend, 1);
3444         else
3445                 if (brcmf_sdio_intr_rstatus(bus)) {
3446                         brcmf_err("failed backplane access\n");
3447                         bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
3448                 }
3449
3450         /* Disable additional interrupts (is this needed now)? */
3451         if (!bus->intr)
3452                 brcmf_err("isr w/o interrupt configured!\n");
3453
3454         brcmf_sdbrcm_adddpctsk(bus);
3455         queue_work(bus->brcmf_wq, &bus->datawork);
3456 }
3457
3458 static bool brcmf_sdbrcm_bus_watchdog(struct brcmf_sdio *bus)
3459 {
3460 #ifdef DEBUG
3461         struct brcmf_bus *bus_if = dev_get_drvdata(bus->sdiodev->dev);
3462 #endif  /* DEBUG */
3463         unsigned long flags;
3464
3465         brcmf_dbg(TIMER, "Enter\n");
3466
3467         /* Poll period: check device if appropriate. */
3468         if (!bus->sr_enabled &&
3469             bus->poll && (++bus->polltick >= bus->pollrate)) {
3470                 u32 intstatus = 0;
3471
3472                 /* Reset poll tick */
3473                 bus->polltick = 0;
3474
3475                 /* Check device if no interrupts */
3476                 if (!bus->intr ||
3477                     (bus->sdcnt.intrcount == bus->sdcnt.lastintrs)) {
3478
3479                         spin_lock_irqsave(&bus->dpc_tl_lock, flags);
3480                         if (list_empty(&bus->dpc_tsklst)) {
3481                                 u8 devpend;
3482                                 spin_unlock_irqrestore(&bus->dpc_tl_lock,
3483                                                        flags);
3484                                 sdio_claim_host(bus->sdiodev->func[1]);
3485                                 devpend = brcmf_sdio_regrb(bus->sdiodev,
3486                                                            SDIO_CCCR_INTx,
3487                                                            NULL);
3488                                 sdio_release_host(bus->sdiodev->func[1]);
3489                                 intstatus =
3490                                     devpend & (INTR_STATUS_FUNC1 |
3491                                                INTR_STATUS_FUNC2);
3492                         } else {
3493                                 spin_unlock_irqrestore(&bus->dpc_tl_lock,
3494                                                        flags);
3495                         }
3496
3497                         /* If there is something, make like the ISR and
3498                                  schedule the DPC */
3499                         if (intstatus) {
3500                                 bus->sdcnt.pollcnt++;
3501                                 atomic_set(&bus->ipend, 1);
3502
3503                                 brcmf_sdbrcm_adddpctsk(bus);
3504                                 queue_work(bus->brcmf_wq, &bus->datawork);
3505                         }
3506                 }
3507
3508                 /* Update interrupt tracking */
3509                 bus->sdcnt.lastintrs = bus->sdcnt.intrcount;
3510         }
3511 #ifdef DEBUG
3512         /* Poll for console output periodically */
3513         if (bus_if && bus_if->state == BRCMF_BUS_DATA &&
3514             bus->console_interval != 0) {
3515                 bus->console.count += BRCMF_WD_POLL_MS;
3516                 if (bus->console.count >= bus->console_interval) {
3517                         bus->console.count -= bus->console_interval;
3518                         sdio_claim_host(bus->sdiodev->func[1]);
3519                         /* Make sure backplane clock is on */
3520                         brcmf_sdbrcm_bus_sleep(bus, false, false);
3521                         if (brcmf_sdbrcm_readconsole(bus) < 0)
3522                                 /* stop on error */
3523                                 bus->console_interval = 0;
3524                         sdio_release_host(bus->sdiodev->func[1]);
3525                 }
3526         }
3527 #endif                          /* DEBUG */
3528
3529         /* On idle timeout clear activity flag and/or turn off clock */
3530         if ((bus->idletime > 0) && (bus->clkstate == CLK_AVAIL)) {
3531                 if (++bus->idlecount >= bus->idletime) {
3532                         bus->idlecount = 0;
3533                         if (bus->activity) {
3534                                 bus->activity = false;
3535                                 brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS);
3536                         } else {
3537                                 brcmf_dbg(SDIO, "idle\n");
3538                                 sdio_claim_host(bus->sdiodev->func[1]);
3539                                 brcmf_sdbrcm_bus_sleep(bus, true, false);
3540                                 sdio_release_host(bus->sdiodev->func[1]);
3541                         }
3542                 }
3543         }
3544
3545         return (atomic_read(&bus->ipend) > 0);
3546 }
3547
3548 static bool brcmf_sdbrcm_chipmatch(u16 chipid)
3549 {
3550         if (chipid == BCM43143_CHIP_ID)
3551                 return true;
3552         if (chipid == BCM43241_CHIP_ID)
3553                 return true;
3554         if (chipid == BCM4329_CHIP_ID)
3555                 return true;
3556         if (chipid == BCM4330_CHIP_ID)
3557                 return true;
3558         if (chipid == BCM4334_CHIP_ID)
3559                 return true;
3560         if (chipid == BCM4335_CHIP_ID)
3561                 return true;
3562         return false;
3563 }
3564
3565 static void brcmf_sdio_dataworker(struct work_struct *work)
3566 {
3567         struct brcmf_sdio *bus = container_of(work, struct brcmf_sdio,
3568                                               datawork);
3569         struct list_head *cur_hd, *tmp_hd;
3570         unsigned long flags;
3571
3572         spin_lock_irqsave(&bus->dpc_tl_lock, flags);
3573         list_for_each_safe(cur_hd, tmp_hd, &bus->dpc_tsklst) {
3574                 spin_unlock_irqrestore(&bus->dpc_tl_lock, flags);
3575
3576                 brcmf_sdbrcm_dpc(bus);
3577
3578                 spin_lock_irqsave(&bus->dpc_tl_lock, flags);
3579                 list_del(cur_hd);
3580                 kfree(cur_hd);
3581         }
3582         spin_unlock_irqrestore(&bus->dpc_tl_lock, flags);
3583 }
3584
3585 static void brcmf_sdbrcm_release_malloc(struct brcmf_sdio *bus)
3586 {
3587         brcmf_dbg(TRACE, "Enter\n");
3588
3589         kfree(bus->rxbuf);
3590         bus->rxctl = bus->rxbuf = NULL;
3591         bus->rxlen = 0;
3592
3593         kfree(bus->databuf);
3594         bus->databuf = NULL;
3595 }
3596
3597 static bool brcmf_sdbrcm_probe_malloc(struct brcmf_sdio *bus)
3598 {
3599         brcmf_dbg(TRACE, "Enter\n");
3600
3601         if (bus->sdiodev->bus_if->maxctl) {
3602                 bus->rxblen =
3603                     roundup((bus->sdiodev->bus_if->maxctl + SDPCM_HDRLEN),
3604                             ALIGNMENT) + BRCMF_SDALIGN;
3605                 bus->rxbuf = kmalloc(bus->rxblen, GFP_ATOMIC);
3606                 if (!(bus->rxbuf))
3607                         goto fail;
3608         }
3609
3610         /* Allocate buffer to receive glomed packet */
3611         bus->databuf = kmalloc(MAX_DATA_BUF, GFP_ATOMIC);
3612         if (!(bus->databuf)) {
3613                 /* release rxbuf which was already located as above */
3614                 if (!bus->rxblen)
3615                         kfree(bus->rxbuf);
3616                 goto fail;
3617         }
3618
3619         /* Align the buffer */
3620         if ((unsigned long)bus->databuf % BRCMF_SDALIGN)
3621                 bus->dataptr = bus->databuf + (BRCMF_SDALIGN -
3622                                ((unsigned long)bus->databuf % BRCMF_SDALIGN));
3623         else
3624                 bus->dataptr = bus->databuf;
3625
3626         return true;
3627
3628 fail:
3629         return false;
3630 }
3631
3632 static bool
3633 brcmf_sdbrcm_probe_attach(struct brcmf_sdio *bus, u32 regsva)
3634 {
3635         u8 clkctl = 0;
3636         int err = 0;
3637         int reg_addr;
3638         u32 reg_val;
3639         u32 drivestrength;
3640
3641         bus->alp_only = true;
3642
3643         sdio_claim_host(bus->sdiodev->func[1]);
3644
3645         pr_debug("F1 signature read @0x18000000=0x%4x\n",
3646                  brcmf_sdio_regrl(bus->sdiodev, SI_ENUM_BASE, NULL));
3647
3648         /*
3649          * Force PLL off until brcmf_sdio_chip_attach()
3650          * programs PLL control regs
3651          */
3652
3653         brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
3654                          BRCMF_INIT_CLKCTL1, &err);
3655         if (!err)
3656                 clkctl = brcmf_sdio_regrb(bus->sdiodev,
3657                                           SBSDIO_FUNC1_CHIPCLKCSR, &err);
3658
3659         if (err || ((clkctl & ~SBSDIO_AVBITS) != BRCMF_INIT_CLKCTL1)) {
3660                 brcmf_err("ChipClkCSR access: err %d wrote 0x%02x read 0x%02x\n",
3661                           err, BRCMF_INIT_CLKCTL1, clkctl);
3662                 goto fail;
3663         }
3664
3665         if (brcmf_sdio_chip_attach(bus->sdiodev, &bus->ci, regsva)) {
3666                 brcmf_err("brcmf_sdio_chip_attach failed!\n");
3667                 goto fail;
3668         }
3669
3670         if (!brcmf_sdbrcm_chipmatch((u16) bus->ci->chip)) {
3671                 brcmf_err("unsupported chip: 0x%04x\n", bus->ci->chip);
3672                 goto fail;
3673         }
3674
3675         if (brcmf_sdbrcm_kso_init(bus)) {
3676                 brcmf_err("error enabling KSO\n");
3677                 goto fail;
3678         }
3679
3680         if ((bus->sdiodev->pdata) && (bus->sdiodev->pdata->drive_strength))
3681                 drivestrength = bus->sdiodev->pdata->drive_strength;
3682         else
3683                 drivestrength = DEFAULT_SDIO_DRIVE_STRENGTH;
3684         brcmf_sdio_chip_drivestrengthinit(bus->sdiodev, bus->ci, drivestrength);
3685
3686         /* Get info on the SOCRAM cores... */
3687         bus->ramsize = bus->ci->ramsize;
3688         if (!(bus->ramsize)) {
3689                 brcmf_err("failed to find SOCRAM memory!\n");
3690                 goto fail;
3691         }
3692
3693         /* Set card control so an SDIO card reset does a WLAN backplane reset */
3694         reg_val = brcmf_sdio_regrb(bus->sdiodev,
3695                                    SDIO_CCCR_BRCM_CARDCTRL, &err);
3696         if (err)
3697                 goto fail;
3698
3699         reg_val |= SDIO_CCCR_BRCM_CARDCTRL_WLANRESET;
3700
3701         brcmf_sdio_regwb(bus->sdiodev,
3702                          SDIO_CCCR_BRCM_CARDCTRL, reg_val, &err);
3703         if (err)
3704                 goto fail;
3705
3706         /* set PMUControl so a backplane reset does PMU state reload */
3707         reg_addr = CORE_CC_REG(bus->ci->c_inf[0].base,
3708                                pmucontrol);
3709         reg_val = brcmf_sdio_regrl(bus->sdiodev,
3710                                    reg_addr,
3711                                    &err);
3712         if (err)
3713                 goto fail;
3714
3715         reg_val |= (BCMA_CC_PMU_CTL_RES_RELOAD << BCMA_CC_PMU_CTL_RES_SHIFT);
3716
3717         brcmf_sdio_regwl(bus->sdiodev,
3718                          reg_addr,
3719                          reg_val,
3720                          &err);
3721         if (err)
3722                 goto fail;
3723
3724
3725         sdio_release_host(bus->sdiodev->func[1]);
3726
3727         brcmu_pktq_init(&bus->txq, (PRIOMASK + 1), TXQLEN);
3728
3729         /* Locate an appropriately-aligned portion of hdrbuf */
3730         bus->rxhdr = (u8 *) roundup((unsigned long)&bus->hdrbuf[0],
3731                                     BRCMF_SDALIGN);
3732
3733         /* Set the poll and/or interrupt flags */
3734         bus->intr = true;
3735         bus->poll = false;
3736         if (bus->poll)
3737                 bus->pollrate = 1;
3738
3739         return true;
3740
3741 fail:
3742         sdio_release_host(bus->sdiodev->func[1]);
3743         return false;
3744 }
3745
3746 static bool brcmf_sdbrcm_probe_init(struct brcmf_sdio *bus)
3747 {
3748         brcmf_dbg(TRACE, "Enter\n");
3749
3750         sdio_claim_host(bus->sdiodev->func[1]);
3751
3752         /* Disable F2 to clear any intermediate frame state on the dongle */
3753         brcmf_sdio_regwb(bus->sdiodev, SDIO_CCCR_IOEx,
3754                          SDIO_FUNC_ENABLE_1, NULL);
3755
3756         bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
3757         bus->rxflow = false;
3758
3759         /* Done with backplane-dependent accesses, can drop clock... */
3760         brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, 0, NULL);
3761
3762         sdio_release_host(bus->sdiodev->func[1]);
3763
3764         /* ...and initialize clock/power states */
3765         bus->clkstate = CLK_SDONLY;
3766         bus->idletime = BRCMF_IDLE_INTERVAL;
3767         bus->idleclock = BRCMF_IDLE_ACTIVE;
3768
3769         /* Query the F2 block size, set roundup accordingly */
3770         bus->blocksize = bus->sdiodev->func[2]->cur_blksize;
3771         bus->roundup = min(max_roundup, bus->blocksize);
3772
3773         /* bus module does not support packet chaining */
3774         bus->use_rxchain = false;
3775         bus->sd_rxchain = false;
3776
3777         /* SR state */
3778         bus->sleeping = false;
3779         bus->sr_enabled = false;
3780
3781         return true;
3782 }
3783
3784 static int
3785 brcmf_sdbrcm_watchdog_thread(void *data)
3786 {
3787         struct brcmf_sdio *bus = (struct brcmf_sdio *)data;
3788
3789         allow_signal(SIGTERM);
3790         /* Run until signal received */
3791         while (1) {
3792                 if (kthread_should_stop())
3793                         break;
3794                 if (!wait_for_completion_interruptible(&bus->watchdog_wait)) {
3795                         brcmf_sdbrcm_bus_watchdog(bus);
3796                         /* Count the tick for reference */
3797                         bus->sdcnt.tickcnt++;
3798                 } else
3799                         break;
3800         }
3801         return 0;
3802 }
3803
3804 static void
3805 brcmf_sdbrcm_watchdog(unsigned long data)
3806 {
3807         struct brcmf_sdio *bus = (struct brcmf_sdio *)data;
3808
3809         if (bus->watchdog_tsk) {
3810                 complete(&bus->watchdog_wait);
3811                 /* Reschedule the watchdog */
3812                 if (bus->wd_timer_valid)
3813                         mod_timer(&bus->timer,
3814                                   jiffies + BRCMF_WD_POLL_MS * HZ / 1000);
3815         }
3816 }
3817
3818 static void brcmf_sdbrcm_release_dongle(struct brcmf_sdio *bus)
3819 {
3820         brcmf_dbg(TRACE, "Enter\n");
3821
3822         if (bus->ci) {
3823                 sdio_claim_host(bus->sdiodev->func[1]);
3824                 brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
3825                 brcmf_sdbrcm_clkctl(bus, CLK_NONE, false);
3826                 sdio_release_host(bus->sdiodev->func[1]);
3827                 brcmf_sdio_chip_detach(&bus->ci);
3828                 if (bus->vars && bus->varsz)
3829                         kfree(bus->vars);
3830                 bus->vars = NULL;
3831         }
3832
3833         brcmf_dbg(TRACE, "Disconnected\n");
3834 }
3835
3836 /* Detach and free everything */
3837 static void brcmf_sdbrcm_release(struct brcmf_sdio *bus)
3838 {
3839         brcmf_dbg(TRACE, "Enter\n");
3840
3841         if (bus) {
3842                 /* De-register interrupt handler */
3843                 brcmf_sdio_intr_unregister(bus->sdiodev);
3844
3845                 cancel_work_sync(&bus->datawork);
3846                 if (bus->brcmf_wq)
3847                         destroy_workqueue(bus->brcmf_wq);
3848
3849                 if (bus->sdiodev->bus_if->drvr) {
3850                         brcmf_detach(bus->sdiodev->dev);
3851                         brcmf_sdbrcm_release_dongle(bus);
3852                 }
3853
3854                 brcmf_sdbrcm_release_malloc(bus);
3855
3856                 kfree(bus);
3857         }
3858
3859         brcmf_dbg(TRACE, "Disconnected\n");
3860 }
3861
3862 static struct brcmf_bus_ops brcmf_sdio_bus_ops = {
3863         .stop = brcmf_sdbrcm_bus_stop,
3864         .init = brcmf_sdbrcm_bus_init,
3865         .txdata = brcmf_sdbrcm_bus_txdata,
3866         .txctl = brcmf_sdbrcm_bus_txctl,
3867         .rxctl = brcmf_sdbrcm_bus_rxctl,
3868         .gettxq = brcmf_sdbrcm_bus_gettxq,
3869 };
3870
3871 void *brcmf_sdbrcm_probe(u32 regsva, struct brcmf_sdio_dev *sdiodev)
3872 {
3873         int ret;
3874         struct brcmf_sdio *bus;
3875         struct brcmf_bus_dcmd *dlst;
3876         u32 dngl_txglom;
3877         u32 dngl_txglomalign;
3878         u8 idx;
3879
3880         brcmf_dbg(TRACE, "Enter\n");
3881
3882         /* We make an assumption about address window mappings:
3883          * regsva == SI_ENUM_BASE*/
3884
3885         /* Allocate private bus interface state */
3886         bus = kzalloc(sizeof(struct brcmf_sdio), GFP_ATOMIC);
3887         if (!bus)
3888                 goto fail;
3889
3890         bus->sdiodev = sdiodev;
3891         sdiodev->bus = bus;
3892         skb_queue_head_init(&bus->glom);
3893         bus->txbound = BRCMF_TXBOUND;
3894         bus->rxbound = BRCMF_RXBOUND;
3895         bus->txminmax = BRCMF_TXMINMAX;
3896         bus->tx_seq = SDPCM_SEQUENCE_WRAP - 1;
3897
3898         INIT_WORK(&bus->datawork, brcmf_sdio_dataworker);
3899         bus->brcmf_wq = create_singlethread_workqueue("brcmf_wq");
3900         if (bus->brcmf_wq == NULL) {
3901                 brcmf_err("insufficient memory to create txworkqueue\n");
3902                 goto fail;
3903         }
3904
3905         /* attempt to attach to the dongle */
3906         if (!(brcmf_sdbrcm_probe_attach(bus, regsva))) {
3907                 brcmf_err("brcmf_sdbrcm_probe_attach failed\n");
3908                 goto fail;
3909         }
3910
3911         spin_lock_init(&bus->rxctl_lock);
3912         spin_lock_init(&bus->txqlock);
3913         init_waitqueue_head(&bus->ctrl_wait);
3914         init_waitqueue_head(&bus->dcmd_resp_wait);
3915
3916         /* Set up the watchdog timer */
3917         init_timer(&bus->timer);
3918         bus->timer.data = (unsigned long)bus;
3919         bus->timer.function = brcmf_sdbrcm_watchdog;
3920
3921         /* Initialize watchdog thread */
3922         init_completion(&bus->watchdog_wait);
3923         bus->watchdog_tsk = kthread_run(brcmf_sdbrcm_watchdog_thread,
3924                                         bus, "brcmf_watchdog");
3925         if (IS_ERR(bus->watchdog_tsk)) {
3926                 pr_warn("brcmf_watchdog thread failed to start\n");
3927                 bus->watchdog_tsk = NULL;
3928         }
3929         /* Initialize DPC thread */
3930         INIT_LIST_HEAD(&bus->dpc_tsklst);
3931         spin_lock_init(&bus->dpc_tl_lock);
3932
3933         /* Assign bus interface call back */
3934         bus->sdiodev->bus_if->dev = bus->sdiodev->dev;
3935         bus->sdiodev->bus_if->ops = &brcmf_sdio_bus_ops;
3936         bus->sdiodev->bus_if->chip = bus->ci->chip;
3937         bus->sdiodev->bus_if->chiprev = bus->ci->chiprev;
3938
3939         /* Attach to the brcmf/OS/network interface */
3940         ret = brcmf_attach(SDPCM_RESERVE, bus->sdiodev->dev);
3941         if (ret != 0) {
3942                 brcmf_err("brcmf_attach failed\n");
3943                 goto fail;
3944         }
3945
3946         /* Allocate buffers */
3947         if (!(brcmf_sdbrcm_probe_malloc(bus))) {
3948                 brcmf_err("brcmf_sdbrcm_probe_malloc failed\n");
3949                 goto fail;
3950         }
3951
3952         if (!(brcmf_sdbrcm_probe_init(bus))) {
3953                 brcmf_err("brcmf_sdbrcm_probe_init failed\n");
3954                 goto fail;
3955         }
3956
3957         brcmf_sdio_debugfs_create(bus);
3958         brcmf_dbg(INFO, "completed!!\n");
3959
3960         /* sdio bus core specific dcmd */
3961         idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
3962         dlst = kzalloc(sizeof(struct brcmf_bus_dcmd), GFP_KERNEL);
3963         if (dlst) {
3964                 if (bus->ci->c_inf[idx].rev < 12) {
3965                         /* for sdio core rev < 12, disable txgloming */
3966                         dngl_txglom = 0;
3967                         dlst->name = "bus:txglom";
3968                         dlst->param = (char *)&dngl_txglom;
3969                         dlst->param_len = sizeof(u32);
3970                 } else {
3971                         /* otherwise, set txglomalign */
3972                         dngl_txglomalign = bus->sdiodev->bus_if->align;
3973                         dlst->name = "bus:txglomalign";
3974                         dlst->param = (char *)&dngl_txglomalign;
3975                         dlst->param_len = sizeof(u32);
3976                 }
3977                 list_add(&dlst->list, &bus->sdiodev->bus_if->dcmd_list);
3978         }
3979
3980         /* if firmware path present try to download and bring up bus */
3981         ret = brcmf_bus_start(bus->sdiodev->dev);
3982         if (ret != 0) {
3983                 brcmf_err("dongle is not responding\n");
3984                 goto fail;
3985         }
3986
3987         return bus;
3988
3989 fail:
3990         brcmf_sdbrcm_release(bus);
3991         return NULL;
3992 }
3993
3994 void brcmf_sdbrcm_disconnect(void *ptr)
3995 {
3996         struct brcmf_sdio *bus = (struct brcmf_sdio *)ptr;
3997
3998         brcmf_dbg(TRACE, "Enter\n");
3999
4000         if (bus)
4001                 brcmf_sdbrcm_release(bus);
4002
4003         brcmf_dbg(TRACE, "Disconnected\n");
4004 }
4005
4006 void
4007 brcmf_sdbrcm_wd_timer(struct brcmf_sdio *bus, uint wdtick)
4008 {
4009         /* Totally stop the timer */
4010         if (!wdtick && bus->wd_timer_valid) {
4011                 del_timer_sync(&bus->timer);
4012                 bus->wd_timer_valid = false;
4013                 bus->save_ms = wdtick;
4014                 return;
4015         }
4016
4017         /* don't start the wd until fw is loaded */
4018         if (bus->sdiodev->bus_if->state == BRCMF_BUS_DOWN)
4019                 return;
4020
4021         if (wdtick) {
4022                 if (bus->save_ms != BRCMF_WD_POLL_MS) {
4023                         if (bus->wd_timer_valid)
4024                                 /* Stop timer and restart at new value */
4025                                 del_timer_sync(&bus->timer);
4026
4027                         /* Create timer again when watchdog period is
4028                            dynamically changed or in the first instance
4029                          */
4030                         bus->timer.expires =
4031                                 jiffies + BRCMF_WD_POLL_MS * HZ / 1000;
4032                         add_timer(&bus->timer);
4033
4034                 } else {
4035                         /* Re arm the timer, at last watchdog period */
4036                         mod_timer(&bus->timer,
4037                                 jiffies + BRCMF_WD_POLL_MS * HZ / 1000);
4038                 }
4039
4040                 bus->wd_timer_valid = true;
4041                 bus->save_ms = wdtick;
4042         }
4043 }