drivers/usb/host/isp1760-hcd.c

   1 /*
   2  * Driver for the NXP ISP1760 chip
   3  *
   4  * However, the code might contain some bugs. What doesn't work for sure is:
   5  * - ISO
   6  * - OTG
   7  e The interrupt line is configured as active low, level.
   8  *
   9  * (c) 2007 Sebastian Siewior <bigeasy@linutronix.de>
  10  *
  11  */
  12 #include <linux/module.h>
  13 #include <linux/kernel.h>
  14 #include <linux/slab.h>
  15 #include <linux/list.h>
  16 #include <linux/usb.h>
  17 #include <linux/debugfs.h>
  18 #include <linux/uaccess.h>
  19 #include <linux/io.h>
  20 #include <linux/mm.h>
  21 #include <asm/unaligned.h>
  22 #include <asm/cacheflush.h>
  23
  24 #include "../core/hcd.h"
  25 #include "isp1760-hcd.h"
  26
  27 static struct kmem_cache *qtd_cachep;
  28 static struct kmem_cache *qh_cachep;
  29
  30 struct isp1760_hcd {
  31         u32 hcs_params;
  32         spinlock_t              lock;
  33         struct inter_packet_info atl_ints[32];
  34         struct inter_packet_info int_ints[32];
  35         struct memory_chunk memory_pool[BLOCKS];
  36
  37         /* periodic schedule support */
  38 #define DEFAULT_I_TDPS          1024
  39         unsigned                periodic_size;
  40         unsigned                i_thresh;
  41         unsigned long           reset_done;
  42         unsigned long           next_statechange;
  43         unsigned int            devflags;
  44 };
  45
  46 static inline struct isp1760_hcd *hcd_to_priv(struct usb_hcd *hcd)
  47 {
  48         return (struct isp1760_hcd *) (hcd->hcd_priv);
  49 }
  50 static inline struct usb_hcd *priv_to_hcd(struct isp1760_hcd *priv)
  51 {
  52         return container_of((void *) priv, struct usb_hcd, hcd_priv);
  53 }
  54
  55 /* Section 2.2 Host Controller Capability Registers */
  56 #define HC_LENGTH(p)            (((p)>>00)&0x00ff)      /* bits 7:0 */
  57 #define HC_VERSION(p)           (((p)>>16)&0xffff)      /* bits 31:16 */
  58 #define HCS_INDICATOR(p)        ((p)&(1 << 16)) /* true: has port indicators */
  59 #define HCS_PPC(p)              ((p)&(1 << 4))  /* true: port power control */
  60 #define HCS_N_PORTS(p)          (((p)>>0)&0xf)  /* bits 3:0, ports on HC */
  61 #define HCC_ISOC_CACHE(p)       ((p)&(1 << 7))  /* true: can cache isoc frame */
  62 #define HCC_ISOC_THRES(p)       (((p)>>4)&0x7)  /* bits 6:4, uframes cached */
  63
  64 /* Section 2.3 Host Controller Operational Registers */
  65 #define CMD_LRESET      (1<<7)          /* partial reset (no ports, etc) */
  66 #define CMD_RESET       (1<<1)          /* reset HC not bus */
  67 #define CMD_RUN         (1<<0)          /* start/stop HC */
  68 #define STS_PCD         (1<<2)          /* port change detect */
  69 #define FLAG_CF         (1<<0)          /* true: we'll support "high speed" */
  70
  71 #define PORT_OWNER      (1<<13)         /* true: companion hc owns this port */
  72 #define PORT_POWER      (1<<12)         /* true: has power (see PPC) */
  73 #define PORT_USB11(x) (((x) & (3 << 10)) == (1 << 10))  /* USB 1.1 device */
  74 #define PORT_RESET      (1<<8)          /* reset port */
  75 #define PORT_SUSPEND    (1<<7)          /* suspend port */
  76 #define PORT_RESUME     (1<<6)          /* resume it */
  77 #define PORT_PE         (1<<2)          /* port enable */
  78 #define PORT_CSC        (1<<1)          /* connect status change */
  79 #define PORT_CONNECT    (1<<0)          /* device connected */
  80 #define PORT_RWC_BITS   (PORT_CSC)
  81
  82 struct isp1760_qtd {
  83         struct isp1760_qtd *hw_next;
  84         u8 packet_type;
  85         u8 toggle;
  86
  87         void *data_buffer;
  88         /* the rest is HCD-private */
  89         struct list_head qtd_list;
  90         struct urb *urb;
  91         size_t length;
  92
  93         /* isp special*/
  94         u32 status;
  95 #define URB_COMPLETE_NOTIFY     (1 << 0)
  96 #define URB_ENQUEUED            (1 << 1)
  97 #define URB_TYPE_ATL            (1 << 2)
  98 #define URB_TYPE_INT            (1 << 3)
  99 };
 100
 101 struct isp1760_qh {
 102         /* first part defined by EHCI spec */
 103         struct list_head qtd_list;
 104         struct isp1760_hcd *priv;
 105
 106         /* periodic schedule info */
 107         unsigned short period;          /* polling interval */
 108         struct usb_device *dev;
 109
 110         u32 toggle;
 111         u32 ping;
 112 };
 113
 114 #define ehci_port_speed(priv, portsc) (1 << USB_PORT_FEAT_HIGHSPEED)
 115
 116 static unsigned int isp1760_readl(__u32 __iomem *regs)
 117 {
 118         return readl(regs);
 119 }
 120
 121 static void isp1760_writel(const unsigned int val, __u32 __iomem *regs)
 122 {
 123         writel(val, regs);
 124 }
 125
 126 /*
 127  * The next two copy via MMIO data to/from the device. memcpy_{to|from}io()
 128  * doesn't quite work because some people have to enforce 32-bit access
 129  */
 130 static void priv_read_copy(struct isp1760_hcd *priv, u32 *src,
 131                 __u32 __iomem *dst, u32 len)
 132 {
 133         u32 val;
 134         u8 *buff8;
 135
 136         if (!src) {
 137                 printk(KERN_ERR "ERROR: buffer: %p len: %d\n", src, len);
 138                 return;
 139         }
 140
 141         while (len >= 4) {
 142                 *src = __raw_readl(dst);
 143                 len -= 4;
 144                 src++;
 145                 dst++;
 146         }
 147
 148         if (!len)
 149                 return;
 150
 151         /* in case we have 3, 2 or 1 by left. The dst buffer may not be fully
 152          * allocated.
 153          */
 154         val = isp1760_readl(dst);
 155
 156         buff8 = (u8 *)src;
 157         while (len) {
 158
 159                 *buff8 = val;
 160                 val >>= 8;
 161                 len--;
 162                 buff8++;
 163         }
 164 }
 165
 166 static void priv_write_copy(const struct isp1760_hcd *priv, const u32 *src,
 167                 __u32 __iomem *dst, u32 len)
 168 {
 169         while (len >= 4) {
 170                 __raw_writel(*src, dst);
 171                 len -= 4;
 172                 src++;
 173                 dst++;
 174         }
 175
 176         if (!len)
 177                 return;
 178         /* in case we have 3, 2 or 1 by left. The buffer is allocated and the
 179          * extra bytes should not be read by the HW
 180          */
 181
 182         __raw_writel(*src, dst);
 183 }
 184
 185 /* memory management of the 60kb on the chip from 0x1000 to 0xffff */
 186 static void init_memory(struct isp1760_hcd *priv)
 187 {
 188         int i;
 189         u32 payload;
 190
 191         payload = 0x1000;
 192         for (i = 0; i < BLOCK_1_NUM; i++) {
 193                 priv->memory_pool[i].start = payload;
 194                 priv->memory_pool[i].size = BLOCK_1_SIZE;
 195                 priv->memory_pool[i].free = 1;
 196                 payload += priv->memory_pool[i].size;
 197         }
 198
 199
 200         for (i = BLOCK_1_NUM; i < BLOCK_1_NUM + BLOCK_2_NUM; i++) {
 201                 priv->memory_pool[i].start = payload;
 202                 priv->memory_pool[i].size = BLOCK_2_SIZE;
 203                 priv->memory_pool[i].free = 1;
 204                 payload += priv->memory_pool[i].size;
 205         }
 206
 207
 208         for (i = BLOCK_1_NUM + BLOCK_2_NUM; i < BLOCKS; i++) {
 209                 priv->memory_pool[i].start = payload;
 210                 priv->memory_pool[i].size = BLOCK_3_SIZE;
 211                 priv->memory_pool[i].free = 1;
 212                 payload += priv->memory_pool[i].size;
 213         }
 214
 215         BUG_ON(payload - priv->memory_pool[i - 1].size > PAYLOAD_SIZE);
 216 }
 217
 218 static u32 alloc_mem(struct isp1760_hcd *priv, u32 size)
 219 {
 220         int i;
 221
 222         if (!size)
 223                 return ISP1760_NULL_POINTER;
 224
 225         for (i = 0; i < BLOCKS; i++) {
 226                 if (priv->memory_pool[i].size >= size &&
 227                                 priv->memory_pool[i].free) {
 228
 229                         priv->memory_pool[i].free = 0;
 230                         return priv->memory_pool[i].start;
 231                 }
 232         }
 233
 234         printk(KERN_ERR "ISP1760 MEM: can not allocate %d bytes of memory\n",
 235                         size);
 236         printk(KERN_ERR "Current memory map:\n");
 237         for (i = 0; i < BLOCKS; i++) {
 238                 printk(KERN_ERR "Pool %2d size %4d status: %d\n",
 239                                 i, priv->memory_pool[i].size,
 240                                 priv->memory_pool[i].free);
 241         }
 242         /* XXX maybe -ENOMEM could be possible */
 243         BUG();
 244         return 0;
 245 }
 246
 247 static void free_mem(struct isp1760_hcd *priv, u32 mem)
 248 {
 249         int i;
 250
 251         if (mem == ISP1760_NULL_POINTER)
 252                 return;
 253
 254         for (i = 0; i < BLOCKS; i++) {
 255                 if (priv->memory_pool[i].start == mem) {
 256
 257                         BUG_ON(priv->memory_pool[i].free);
 258
 259                         priv->memory_pool[i].free = 1;
 260                         return ;
 261                 }
 262         }
 263
 264         printk(KERN_ERR "Trying to free not-here-allocated memory :%08x\n",
 265                         mem);
 266         BUG();
 267 }
 268
 269 static void isp1760_init_regs(struct usb_hcd *hcd)
 270 {
 271         isp1760_writel(0, hcd->regs + HC_BUFFER_STATUS_REG);
 272         isp1760_writel(NO_TRANSFER_ACTIVE, hcd->regs +
 273                         HC_ATL_PTD_SKIPMAP_REG);
 274         isp1760_writel(NO_TRANSFER_ACTIVE, hcd->regs +
 275                         HC_INT_PTD_SKIPMAP_REG);
 276         isp1760_writel(NO_TRANSFER_ACTIVE, hcd->regs +
 277                         HC_ISO_PTD_SKIPMAP_REG);
 278
 279         isp1760_writel(~NO_TRANSFER_ACTIVE, hcd->regs +
 280                         HC_ATL_PTD_DONEMAP_REG);
 281         isp1760_writel(~NO_TRANSFER_ACTIVE, hcd->regs +
 282                         HC_INT_PTD_DONEMAP_REG);
 283         isp1760_writel(~NO_TRANSFER_ACTIVE, hcd->regs +
 284                         HC_ISO_PTD_DONEMAP_REG);
 285 }
 286
 287 static int handshake(struct isp1760_hcd *priv, void __iomem *ptr,
 288                       u32 mask, u32 done, int usec)
 289 {
 290         u32 result;
 291
 292         do {
 293                 result = isp1760_readl(ptr);
 294                 if (result == ~0)
 295                         return -ENODEV;
 296                 result &= mask;
 297                 if (result == done)
 298                         return 0;
 299                 udelay(1);
 300                 usec--;
 301         } while (usec > 0);
 302         return -ETIMEDOUT;
 303 }
 304
 305 /* reset a non-running (STS_HALT == 1) controller */
 306 static int ehci_reset(struct isp1760_hcd *priv)
 307 {
 308         int retval;
 309         struct usb_hcd *hcd = priv_to_hcd(priv);
 310         u32 command = isp1760_readl(hcd->regs + HC_USBCMD);
 311
 312         command |= CMD_RESET;
 313         isp1760_writel(command, hcd->regs + HC_USBCMD);
 314         hcd->state = HC_STATE_HALT;
 315         priv->next_statechange = jiffies;
 316         retval = handshake(priv, hcd->regs + HC_USBCMD,
 317                             CMD_RESET, 0, 250 * 1000);
 318         return retval;
 319 }
 320
 321 static void qh_destroy(struct isp1760_qh *qh)
 322 {
 323         BUG_ON(!list_empty(&qh->qtd_list));
 324         kmem_cache_free(qh_cachep, qh);
 325 }
 326
 327 static struct isp1760_qh *isp1760_qh_alloc(struct isp1760_hcd *priv,
 328                 gfp_t flags)
 329 {
 330         struct isp1760_qh *qh;
 331
 332         qh = kmem_cache_zalloc(qh_cachep, flags);
 333         if (!qh)
 334                 return qh;
 335
 336         INIT_LIST_HEAD(&qh->qtd_list);
 337         qh->priv = priv;
 338         return qh;
 339 }
 340
 341 /* magic numbers that can affect system performance */
 342 #define EHCI_TUNE_CERR          3       /* 0-3 qtd retries; 0 == don't stop */
 343 #define EHCI_TUNE_RL_HS         4       /* nak throttle; see 4.9 */
 344 #define EHCI_TUNE_RL_TT         0
 345 #define EHCI_TUNE_MULT_HS       1       /* 1-3 transactions/uframe; 4.10.3 */
 346 #define EHCI_TUNE_MULT_TT       1
 347 #define EHCI_TUNE_FLS           2       /* (small) 256 frame schedule */
 348
 349 /* one-time init, only for memory state */
 350 static int priv_init(struct usb_hcd *hcd)
 351 {
 352         struct isp1760_hcd              *priv = hcd_to_priv(hcd);
 353         u32                     hcc_params;
 354
 355         spin_lock_init(&priv->lock);
 356
 357         /*
 358          * hw default: 1K periodic list heads, one per frame.
 359          * periodic_size can shrink by USBCMD update if hcc_params allows.
 360          */
 361         priv->periodic_size = DEFAULT_I_TDPS;
 362
 363         /* controllers may cache some of the periodic schedule ... */
 364         hcc_params = isp1760_readl(hcd->regs + HC_HCCPARAMS);
 365         /* full frame cache */
 366         if (HCC_ISOC_CACHE(hcc_params))
 367                 priv->i_thresh = 8;
 368         else /* N microframes cached */
 369                 priv->i_thresh = 2 + HCC_ISOC_THRES(hcc_params);
 370
 371         return 0;
 372 }
 373
 374 static int isp1760_hc_setup(struct usb_hcd *hcd)
 375 {
 376         struct isp1760_hcd *priv = hcd_to_priv(hcd);
 377         int result;
 378         u32 scratch, hwmode;
 379
 380         /* Setup HW Mode Control: This assumes a level active-low interrupt */
 381         hwmode = HW_DATA_BUS_32BIT;
 382
 383         if (priv->devflags & ISP1760_FLAG_BUS_WIDTH_16)
 384                 hwmode &= ~HW_DATA_BUS_32BIT;
 385         if (priv->devflags & ISP1760_FLAG_ANALOG_OC)
 386                 hwmode |= HW_ANA_DIGI_OC;
 387         if (priv->devflags & ISP1760_FLAG_DACK_POL_HIGH)
 388                 hwmode |= HW_DACK_POL_HIGH;
 389         if (priv->devflags & ISP1760_FLAG_DREQ_POL_HIGH)
 390                 hwmode |= HW_DREQ_POL_HIGH;
 391         if (priv->devflags & ISP1760_FLAG_INTR_POL_HIGH)
 392                 hwmode |= HW_INTR_HIGH_ACT;
 393         if (priv->devflags & ISP1760_FLAG_INTR_EDGE_TRIG)
 394                 hwmode |= HW_INTR_EDGE_TRIG;
 395
 396         /*
 397          * We have to set this first in case we're in 16-bit mode.
 398          * Write it twice to ensure correct upper bits if switching
 399          * to 16-bit mode.
 400          */
 401         isp1760_writel(hwmode, hcd->regs + HC_HW_MODE_CTRL);
 402         isp1760_writel(hwmode, hcd->regs + HC_HW_MODE_CTRL);
 403
 404         isp1760_writel(0xdeadbabe, hcd->regs + HC_SCRATCH_REG);
 405         /* Change bus pattern */
 406         scratch = isp1760_readl(hcd->regs + HC_CHIP_ID_REG);
 407         scratch = isp1760_readl(hcd->regs + HC_SCRATCH_REG);
 408         if (scratch != 0xdeadbabe) {
 409                 printk(KERN_ERR "ISP1760: Scratch test failed.\n");
 410                 return -ENODEV;
 411         }
 412
 413         /* pre reset */
 414         isp1760_init_regs(hcd);
 415
 416         /* reset */
 417         isp1760_writel(SW_RESET_RESET_ALL, hcd->regs + HC_RESET_REG);
 418         mdelay(100);
 419
 420         isp1760_writel(SW_RESET_RESET_HC, hcd->regs + HC_RESET_REG);
 421         mdelay(100);
 422
 423         result = ehci_reset(priv);
 424         if (result)
 425                 return result;
 426
 427         /* Step 11 passed */
 428
 429         isp1760_info(priv, "bus width: %d, oc: %s\n",
 430                            (priv->devflags & ISP1760_FLAG_BUS_WIDTH_16) ?
 431                            16 : 32, (priv->devflags & ISP1760_FLAG_ANALOG_OC) ?
 432                            "analog" : "digital");
 433
 434         /* ATL reset */
 435         isp1760_writel(hwmode | ALL_ATX_RESET, hcd->regs + HC_HW_MODE_CTRL);
 436         mdelay(10);
 437         isp1760_writel(hwmode, hcd->regs + HC_HW_MODE_CTRL);
 438
 439         isp1760_writel(INTERRUPT_ENABLE_MASK, hcd->regs + HC_INTERRUPT_REG);
 440         isp1760_writel(INTERRUPT_ENABLE_MASK, hcd->regs + HC_INTERRUPT_ENABLE);
 441
 442         /*
 443          * PORT 1 Control register of the ISP1760 is the OTG control
 444          * register on ISP1761. Since there is no OTG or device controller
 445          * support in this driver, we use port 1 as a "normal" USB host port on
 446          * both chips.
 447          */
 448         isp1760_writel(PORT1_POWER | PORT1_INIT2,
 449                        hcd->regs + HC_PORT1_CTRL);
 450         mdelay(10);
 451
 452         priv->hcs_params = isp1760_readl(hcd->regs + HC_HCSPARAMS);
 453
 454         return priv_init(hcd);
 455 }
 456
 457 static void isp1760_init_maps(struct usb_hcd *hcd)
 458 {
 459         /*set last maps, for iso its only 1, else 32 tds bitmap*/
 460         isp1760_writel(0x80000000, hcd->regs + HC_ATL_PTD_LASTPTD_REG);
 461         isp1760_writel(0x80000000, hcd->regs + HC_INT_PTD_LASTPTD_REG);
 462         isp1760_writel(0x00000001, hcd->regs + HC_ISO_PTD_LASTPTD_REG);
 463 }
 464
 465 static void isp1760_enable_interrupts(struct usb_hcd *hcd)
 466 {
 467         isp1760_writel(0, hcd->regs + HC_ATL_IRQ_MASK_AND_REG);
 468         isp1760_writel(0, hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
 469         isp1760_writel(0, hcd->regs + HC_INT_IRQ_MASK_AND_REG);
 470         isp1760_writel(0, hcd->regs + HC_INT_IRQ_MASK_OR_REG);
 471         isp1760_writel(0, hcd->regs + HC_ISO_IRQ_MASK_AND_REG);
 472         isp1760_writel(0xffffffff, hcd->regs + HC_ISO_IRQ_MASK_OR_REG);
 473         /* step 23 passed */
 474 }
 475
 476 static int isp1760_run(struct usb_hcd *hcd)
 477 {
 478         struct isp1760_hcd *priv = hcd_to_priv(hcd);
 479         int retval;
 480         u32 temp;
 481         u32 command;
 482         u32 chipid;
 483
 484         hcd->uses_new_polling = 1;
 485         hcd->poll_rh = 0;
 486
 487         hcd->state = HC_STATE_RUNNING;
 488         isp1760_enable_interrupts(hcd);
 489         temp = isp1760_readl(hcd->regs + HC_HW_MODE_CTRL);
 490         isp1760_writel(temp | HW_GLOBAL_INTR_EN, hcd->regs + HC_HW_MODE_CTRL);
 491
 492         command = isp1760_readl(hcd->regs + HC_USBCMD);
 493         command &= ~(CMD_LRESET|CMD_RESET);
 494         command |= CMD_RUN;
 495         isp1760_writel(command, hcd->regs + HC_USBCMD);
 496
 497         retval = handshake(priv, hcd->regs + HC_USBCMD, CMD_RUN, CMD_RUN,
 498                         250 * 1000);
 499         if (retval)
 500                 return retval;
 501
 502         /*
 503          * XXX
 504          * Spec says to write FLAG_CF as last config action, priv code grabs
 505          * the semaphore while doing so.
 506          */
 507         down_write(&ehci_cf_port_reset_rwsem);
 508         isp1760_writel(FLAG_CF, hcd->regs + HC_CONFIGFLAG);
 509
 510         retval = handshake(priv, hcd->regs + HC_CONFIGFLAG, FLAG_CF, FLAG_CF,
 511                         250 * 1000);
 512         up_write(&ehci_cf_port_reset_rwsem);
 513         if (retval)
 514                 return retval;
 515
 516         chipid = isp1760_readl(hcd->regs + HC_CHIP_ID_REG);
 517         isp1760_info(priv, "USB ISP %04x HW rev. %d started\n", chipid & 0xffff,
 518                         chipid >> 16);
 519
 520         /* PTD Register Init Part 2, Step 28 */
 521         /* enable INTs */
 522         isp1760_init_maps(hcd);
 523
 524         /* GRR this is run-once init(), being done every time the HC starts.
 525          * So long as they're part of class devices, we can't do it init()
 526          * since the class device isn't created that early.
 527          */
 528         return 0;
 529 }
 530
 531 static u32 base_to_chip(u32 base)
 532 {
 533         return ((base - 0x400) >> 3);
 534 }
 535
 536 static void transform_into_atl(struct isp1760_hcd *priv, struct isp1760_qh *qh,
 537                         struct isp1760_qtd *qtd, struct urb *urb,
 538                         u32 payload, struct ptd *ptd)
 539 {
 540         u32 dw0;
 541         u32 dw1;
 542         u32 dw2;
 543         u32 dw3;
 544         u32 maxpacket;
 545         u32 multi;
 546         u32 pid_code;
 547         u32 rl = RL_COUNTER;
 548         u32 nak = NAK_COUNTER;
 549
 550         /* according to 3.6.2, max packet len can not be > 0x400 */
 551         maxpacket = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
 552         multi =  1 + ((maxpacket >> 11) & 0x3);
 553         maxpacket &= 0x7ff;
 554
 555         /* DW0 */
 556         dw0 = PTD_VALID;
 557         dw0 |= PTD_LENGTH(qtd->length);
 558         dw0 |= PTD_MAXPACKET(maxpacket);
 559         dw0 |= PTD_ENDPOINT(usb_pipeendpoint(urb->pipe));
 560         dw1 = usb_pipeendpoint(urb->pipe) >> 1;
 561
 562         /* DW1 */
 563         dw1 |= PTD_DEVICE_ADDR(usb_pipedevice(urb->pipe));
 564
 565         pid_code = qtd->packet_type;
 566         dw1 |= PTD_PID_TOKEN(pid_code);
 567
 568         if (usb_pipebulk(urb->pipe))
 569                 dw1 |= PTD_TRANS_BULK;
 570         else if  (usb_pipeint(urb->pipe))
 571                 dw1 |= PTD_TRANS_INT;
 572
 573         if (urb->dev->speed != USB_SPEED_HIGH) {
 574                 /* split transaction */
 575
 576                 dw1 |= PTD_TRANS_SPLIT;
 577                 if (urb->dev->speed == USB_SPEED_LOW)
 578                         dw1 |= PTD_SE_USB_LOSPEED;
 579
 580                 dw1 |= PTD_PORT_NUM(urb->dev->ttport);
 581                 dw1 |= PTD_HUB_NUM(urb->dev->tt->hub->devnum);
 582
 583                 /* SE bit for Split INT transfers */
 584                 if (usb_pipeint(urb->pipe) &&
 585                                 (urb->dev->speed == USB_SPEED_LOW))
 586                         dw1 |= 2 << 16;
 587
 588                 dw3 = 0;
 589                 rl = 0;
 590                 nak = 0;
 591         } else {
 592                 dw0 |= PTD_MULTI(multi);
 593                 if (usb_pipecontrol(urb->pipe) || usb_pipebulk(urb->pipe))
 594                         dw3 = qh->ping;
 595                 else
 596                         dw3 = 0;
 597         }
 598         /* DW2 */
 599         dw2 = 0;
 600         dw2 |= PTD_DATA_START_ADDR(base_to_chip(payload));
 601         dw2 |= PTD_RL_CNT(rl);
 602         dw3 |= PTD_NAC_CNT(nak);
 603
 604         /* DW3 */
 605         if (usb_pipecontrol(urb->pipe))
 606                 dw3 |= PTD_DATA_TOGGLE(qtd->toggle);
 607         else
 608                 dw3 |= qh->toggle;
 609
 610
 611         dw3 |= PTD_ACTIVE;
 612         /* Cerr */
 613         dw3 |= PTD_CERR(ERR_COUNTER);
 614
 615         memset(ptd, 0, sizeof(*ptd));
 616
 617         ptd->dw0 = cpu_to_le32(dw0);
 618         ptd->dw1 = cpu_to_le32(dw1);
 619         ptd->dw2 = cpu_to_le32(dw2);
 620         ptd->dw3 = cpu_to_le32(dw3);
 621 }
 622
 623 static void transform_add_int(struct isp1760_hcd *priv, struct isp1760_qh *qh,
 624                         struct isp1760_qtd *qtd, struct urb *urb,
 625                         u32 payload, struct ptd *ptd)
 626 {
 627         u32 maxpacket;
 628         u32 multi;
 629         u32 numberofusofs;
 630         u32 i;
 631         u32 usofmask, usof;
 632         u32 period;
 633
 634         maxpacket = usb_maxpacket(urb->dev, urb->pipe, usb_pipeout(urb->pipe));
 635         multi =  1 + ((maxpacket >> 11) & 0x3);
 636         maxpacket &= 0x7ff;
 637         /* length of the data per uframe */
 638         maxpacket = multi * maxpacket;
 639
 640         numberofusofs = urb->transfer_buffer_length / maxpacket;
 641         if (urb->transfer_buffer_length % maxpacket)
 642                 numberofusofs += 1;
 643
 644         usofmask = 1;
 645         usof = 0;
 646         for (i = 0; i < numberofusofs; i++) {
 647                 usof |= usofmask;
 648                 usofmask <<= 1;
 649         }
 650
 651         if (urb->dev->speed != USB_SPEED_HIGH) {
 652                 /* split */
 653                 ptd->dw5 = cpu_to_le32(0x1c);
 654
 655                 if (qh->period >= 32)
 656                         period = qh->period / 2;
 657                 else
 658                         period = qh->period;
 659
 660         } else {
 661
 662                 if (qh->period >= 8)
 663                         period = qh->period/8;
 664                 else
 665                         period = qh->period;
 666
 667                 if (period >= 32)
 668                         period  = 16;
 669
 670                 if (qh->period >= 8) {
 671                         /* millisecond period */
 672                         period = (period << 3);
 673                 } else {
 674                         /* usof based tranmsfers */
 675                         /* minimum 4 usofs */
 676                         usof = 0x11;
 677                 }
 678         }
 679
 680         ptd->dw2 |= cpu_to_le32(period);
 681         ptd->dw4 = cpu_to_le32(usof);
 682 }
 683
 684 static void transform_into_int(struct isp1760_hcd *priv, struct isp1760_qh *qh,
 685                         struct isp1760_qtd *qtd, struct urb *urb,
 686                         u32 payload, struct ptd *ptd)
 687 {
 688         transform_into_atl(priv, qh, qtd, urb, payload, ptd);
 689         transform_add_int(priv, qh, qtd, urb,  payload, ptd);
 690 }
 691
 692 static int qtd_fill(struct isp1760_qtd *qtd, void *databuffer, size_t len,
 693                 u32 token)
 694 {
 695         int count;
 696
 697         qtd->data_buffer = databuffer;
 698         qtd->packet_type = GET_QTD_TOKEN_TYPE(token);
 699         qtd->toggle = GET_DATA_TOGGLE(token);
 700
 701         if (len > HC_ATL_PL_SIZE)
 702                 count = HC_ATL_PL_SIZE;
 703         else
 704                 count = len;
 705
 706         qtd->length = count;
 707         return count;
 708 }
 709
 710 static int check_error(struct ptd *ptd)
 711 {
 712         int error = 0;
 713         u32 dw3;
 714
 715         dw3 = le32_to_cpu(ptd->dw3);
 716         if (dw3 & DW3_HALT_BIT)
 717                 error = -EPIPE;
 718
 719         if (dw3 & DW3_ERROR_BIT) {
 720                 printk(KERN_ERR "error bit is set in DW3\n");
 721                 error = -EPIPE;
 722         }
 723
 724         if (dw3 & DW3_QTD_ACTIVE) {
 725                 printk(KERN_ERR "transfer active bit is set DW3\n");
 726                 printk(KERN_ERR "nak counter: %d, rl: %d\n", (dw3 >> 19) & 0xf,
 727                                 (le32_to_cpu(ptd->dw2) >> 25) & 0xf);
 728         }
 729
 730         return error;
 731 }
 732
 733 static void check_int_err_status(u32 dw4)
 734 {
 735         u32 i;
 736
 737         dw4 >>= 8;
 738
 739         for (i = 0; i < 8; i++) {
 740                 switch (dw4 & 0x7) {
 741                 case INT_UNDERRUN:
 742                         printk(KERN_ERR "ERROR: under run , %d\n", i);
 743                         break;
 744
 745                 case INT_EXACT:
 746                         printk(KERN_ERR "ERROR: transaction error, %d\n", i);
 747                         break;
 748
 749                 case INT_BABBLE:
 750                         printk(KERN_ERR "ERROR: babble error, %d\n", i);
 751                         break;
 752                 }
 753                 dw4 >>= 3;
 754         }
 755 }
 756
 757 static void enqueue_one_qtd(struct isp1760_qtd *qtd, struct isp1760_hcd *priv,
 758                 u32 payload)
 759 {
 760         u32 token;
 761         struct usb_hcd *hcd = priv_to_hcd(priv);
 762
 763         token = qtd->packet_type;
 764
 765         if (qtd->length && (qtd->length <= HC_ATL_PL_SIZE)) {
 766                 switch (token) {
 767                 case IN_PID:
 768                         break;
 769                 case OUT_PID:
 770                 case SETUP_PID:
 771                         priv_write_copy(priv, qtd->data_buffer,
 772                                         hcd->regs + payload,
 773                                         qtd->length);
 774                 }
 775         }
 776 }
 777
 778 static void enqueue_one_atl_qtd(u32 atl_regs, u32 payload,
 779                 struct isp1760_hcd *priv, struct isp1760_qh *qh,
 780                 struct urb *urb, u32 slot, struct isp1760_qtd *qtd)
 781 {
 782         struct ptd ptd;
 783         struct usb_hcd *hcd = priv_to_hcd(priv);
 784
 785         transform_into_atl(priv, qh, qtd, urb, payload, &ptd);
 786         priv_write_copy(priv, (u32 *)&ptd, hcd->regs + atl_regs, sizeof(ptd));
 787         enqueue_one_qtd(qtd, priv, payload);
 788
 789         priv->atl_ints[slot].urb = urb;
 790         priv->atl_ints[slot].qh = qh;
 791         priv->atl_ints[slot].qtd = qtd;
 792         priv->atl_ints[slot].data_buffer = qtd->data_buffer;
 793         priv->atl_ints[slot].payload = payload;
 794         qtd->status |= URB_ENQUEUED | URB_TYPE_ATL;
 795         qtd->status |= slot << 16;
 796 }
 797
 798 static void enqueue_one_int_qtd(u32 int_regs, u32 payload,
 799                 struct isp1760_hcd *priv, struct isp1760_qh *qh,
 800                 struct urb *urb, u32 slot,  struct isp1760_qtd *qtd)
 801 {
 802         struct ptd ptd;
 803         struct usb_hcd *hcd = priv_to_hcd(priv);
 804
 805         transform_into_int(priv, qh, qtd, urb, payload, &ptd);
 806         priv_write_copy(priv, (u32 *)&ptd, hcd->regs + int_regs, sizeof(ptd));
 807         enqueue_one_qtd(qtd, priv, payload);
 808
 809         priv->int_ints[slot].urb = urb;
 810         priv->int_ints[slot].qh = qh;
 811         priv->int_ints[slot].qtd = qtd;
 812         priv->int_ints[slot].data_buffer = qtd->data_buffer;
 813         priv->int_ints[slot].payload = payload;
 814         qtd->status |= URB_ENQUEUED | URB_TYPE_INT;
 815         qtd->status |= slot << 16;
 816 }
 817
 818 static void enqueue_an_ATL_packet(struct usb_hcd *hcd, struct isp1760_qh *qh,
 819                                   struct isp1760_qtd *qtd)
 820 {
 821         struct isp1760_hcd *priv = hcd_to_priv(hcd);
 822         u32 skip_map, or_map;
 823         u32 queue_entry;
 824         u32 slot;
 825         u32 atl_regs, payload;
 826         u32 buffstatus;
 827
 828         /*
 829          * When this function is called from the interrupt handler to enqueue
 830          * a follow-up packet, the SKIP register gets written and read back
 831          * almost immediately. With ISP1761, this register requires a delay of
 832          * 195ns between a write and subsequent read (see section 15.1.1.3).
 833          */
 834         ndelay(195);
 835         skip_map = isp1760_readl(hcd->regs + HC_ATL_PTD_SKIPMAP_REG);
 836
 837         BUG_ON(!skip_map);
 838         slot = __ffs(skip_map);
 839         queue_entry = 1 << slot;
 840
 841         atl_regs = ATL_REGS_OFFSET + slot * sizeof(struct ptd);
 842
 843         payload = alloc_mem(priv, qtd->length);
 844
 845         enqueue_one_atl_qtd(atl_regs, payload, priv, qh, qtd->urb, slot, qtd);
 846
 847         or_map = isp1760_readl(hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
 848         or_map |= queue_entry;
 849         isp1760_writel(or_map, hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
 850
 851         skip_map &= ~queue_entry;
 852         isp1760_writel(skip_map, hcd->regs + HC_ATL_PTD_SKIPMAP_REG);
 853
 854         buffstatus = isp1760_readl(hcd->regs + HC_BUFFER_STATUS_REG);
 855         buffstatus |= ATL_BUFFER;
 856         isp1760_writel(buffstatus, hcd->regs + HC_BUFFER_STATUS_REG);
 857 }
 858
 859 static void enqueue_an_INT_packet(struct usb_hcd *hcd, struct isp1760_qh *qh,
 860                                   struct isp1760_qtd *qtd)
 861 {
 862         struct isp1760_hcd *priv = hcd_to_priv(hcd);
 863         u32 skip_map, or_map;
 864         u32 queue_entry;
 865         u32 slot;
 866         u32 int_regs, payload;
 867         u32 buffstatus;
 868
 869         /*
 870          * When this function is called from the interrupt handler to enqueue
 871          * a follow-up packet, the SKIP register gets written and read back
 872          * almost immediately. With ISP1761, this register requires a delay of
 873          * 195ns between a write and subsequent read (see section 15.1.1.3).
 874          */
 875         ndelay(195);
 876         skip_map = isp1760_readl(hcd->regs + HC_INT_PTD_SKIPMAP_REG);
 877
 878         BUG_ON(!skip_map);
 879         slot = __ffs(skip_map);
 880         queue_entry = 1 << slot;
 881
 882         int_regs = INT_REGS_OFFSET + slot * sizeof(struct ptd);
 883
 884         payload = alloc_mem(priv, qtd->length);
 885
 886         enqueue_one_int_qtd(int_regs, payload, priv, qh, qtd->urb, slot, qtd);
 887
 888         or_map = isp1760_readl(hcd->regs + HC_INT_IRQ_MASK_OR_REG);
 889         or_map |= queue_entry;
 890         isp1760_writel(or_map, hcd->regs + HC_INT_IRQ_MASK_OR_REG);
 891
 892         skip_map &= ~queue_entry;
 893         isp1760_writel(skip_map, hcd->regs + HC_INT_PTD_SKIPMAP_REG);
 894
 895         buffstatus = isp1760_readl(hcd->regs + HC_BUFFER_STATUS_REG);
 896         buffstatus |= INT_BUFFER;
 897         isp1760_writel(buffstatus, hcd->regs + HC_BUFFER_STATUS_REG);
 898 }
 899
 900 static void isp1760_urb_done(struct isp1760_hcd *priv, struct urb *urb, int status)
 901 __releases(priv->lock)
 902 __acquires(priv->lock)
 903 {
 904         if (!urb->unlinked) {
 905                 if (status == -EINPROGRESS)
 906                         status = 0;
 907         }
 908
 909         if (usb_pipein(urb->pipe) && usb_pipetype(urb->pipe) != PIPE_CONTROL) {
 910                 void *ptr;
 911                 for (ptr = urb->transfer_buffer;
 912                      ptr < urb->transfer_buffer + urb->transfer_buffer_length;
 913                      ptr += PAGE_SIZE)
 914                         flush_dcache_page(virt_to_page(ptr));
 915         }
 916
 917         /* complete() can reenter this HCD */
 918         usb_hcd_unlink_urb_from_ep(priv_to_hcd(priv), urb);
 919         spin_unlock(&priv->lock);
 920         usb_hcd_giveback_urb(priv_to_hcd(priv), urb, status);
 921         spin_lock(&priv->lock);
 922 }
 923
 924 static void isp1760_qtd_free(struct isp1760_qtd *qtd)
 925 {
 926         kmem_cache_free(qtd_cachep, qtd);
 927 }
 928
 929 static struct isp1760_qtd *clean_this_qtd(struct isp1760_qtd *qtd)
 930 {
 931         struct isp1760_qtd *tmp_qtd;
 932
 933         tmp_qtd = qtd->hw_next;
 934         list_del(&qtd->qtd_list);
 935         isp1760_qtd_free(qtd);
 936         return tmp_qtd;
 937 }
 938
 939 /*
 940  * Remove this QTD from the QH list and free its memory. If this QTD
 941  * isn't the last one than remove also his successor(s).
 942  * Returns the QTD which is part of an new URB and should be enqueued.
 943  */
 944 static struct isp1760_qtd *clean_up_qtdlist(struct isp1760_qtd *qtd)
 945 {
 946         struct isp1760_qtd *tmp_qtd;
 947         int last_one;
 948
 949         do {
 950                 tmp_qtd = qtd->hw_next;
 951                 last_one = qtd->status & URB_COMPLETE_NOTIFY;
 952                 list_del(&qtd->qtd_list);
 953                 isp1760_qtd_free(qtd);
 954                 qtd = tmp_qtd;
 955         } while (!last_one && qtd);
 956
 957         return qtd;
 958 }
 959
 960 static void do_atl_int(struct usb_hcd *usb_hcd)
 961 {
 962         struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
 963         u32 done_map, skip_map;
 964         struct ptd ptd;
 965         struct urb *urb = NULL;
 966         u32 atl_regs_base;
 967         u32 atl_regs;
 968         u32 queue_entry;
 969         u32 payload;
 970         u32 length;
 971         u32 or_map;
 972         u32 status = -EINVAL;
 973         int error;
 974         struct isp1760_qtd *qtd;
 975         struct isp1760_qh *qh;
 976         u32 rl;
 977         u32 nakcount;
 978
 979         done_map = isp1760_readl(usb_hcd->regs +
 980                         HC_ATL_PTD_DONEMAP_REG);
 981         skip_map = isp1760_readl(usb_hcd->regs +
 982                         HC_ATL_PTD_SKIPMAP_REG);
 983
 984         or_map = isp1760_readl(usb_hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
 985         or_map &= ~done_map;
 986         isp1760_writel(or_map, usb_hcd->regs + HC_ATL_IRQ_MASK_OR_REG);
 987
 988         atl_regs_base = ATL_REGS_OFFSET;
 989         while (done_map) {
 990                 u32 dw1;
 991                 u32 dw2;
 992                 u32 dw3;
 993
 994                 status = 0;
 995
 996                 queue_entry = __ffs(done_map);
 997                 done_map &= ~(1 << queue_entry);
 998                 skip_map |= 1 << queue_entry;
 999
1000                 atl_regs = atl_regs_base + queue_entry * sizeof(struct ptd);
1001
1002                 urb = priv->atl_ints[queue_entry].urb;
1003                 qtd = priv->atl_ints[queue_entry].qtd;
1004                 qh = priv->atl_ints[queue_entry].qh;
1005                 payload = priv->atl_ints[queue_entry].payload;
1006
1007                 if (!qh) {
1008                         printk(KERN_ERR "qh is 0\n");
1009                         continue;
1010                 }
1011                 isp1760_writel(atl_regs + ISP_BANK(0), usb_hcd->regs +
1012                                 HC_MEMORY_REG);
1013                 isp1760_writel(payload  + ISP_BANK(1), usb_hcd->regs +
1014                                 HC_MEMORY_REG);
1015                 /*
1016                  * write bank1 address twice to ensure the 90ns delay (time
1017                  * between BANK0 write and the priv_read_copy() call is at
1018                  * least 3*t_WHWL + 2*t_w11 = 3*25ns + 2*17ns = 109ns)
1019                  */
1020                 isp1760_writel(payload  + ISP_BANK(1), usb_hcd->regs +
1021                                 HC_MEMORY_REG);
1022
1023                 priv_read_copy(priv, (u32 *)&ptd, usb_hcd->regs + atl_regs +
1024                                 ISP_BANK(0), sizeof(ptd));
1025
1026                 dw1 = le32_to_cpu(ptd.dw1);
1027                 dw2 = le32_to_cpu(ptd.dw2);
1028                 dw3 = le32_to_cpu(ptd.dw3);
1029                 rl = (dw2 >> 25) & 0x0f;
1030                 nakcount = (dw3 >> 19) & 0xf;
1031
1032                 /* Transfer Error, *but* active and no HALT -> reload */
1033                 if ((dw3 & DW3_ERROR_BIT) && (dw3 & DW3_QTD_ACTIVE) &&
1034                                 !(dw3 & DW3_HALT_BIT)) {
1035
1036                         /* according to ppriv code, we have to
1037                          * reload this one if trasfered bytes != requested bytes
1038                          * else act like everything went smooth..
1039                          * XXX This just doesn't feel right and hasn't
1040                          * triggered so far.
1041                          */
1042
1043                         length = PTD_XFERRED_LENGTH(dw3);
1044                         printk(KERN_ERR "Should reload now.... transfered %d "
1045                                         "of %zu\n", length, qtd->length);
1046                         BUG();
1047                 }
1048
1049                 if (!nakcount && (dw3 & DW3_QTD_ACTIVE)) {
1050                         u32 buffstatus;
1051
1052                         /*
1053                          * NAKs are handled in HW by the chip. Usually if the
1054                          * device is not able to send data fast enough.
1055                          * This happens mostly on slower hardware.
1056                          */
1057                         printk(KERN_NOTICE "Reloading ptd %p/%p... qh %p read: "
1058                                         "%d of %zu done: %08x cur: %08x\n", qtd,
1059                                         urb, qh, PTD_XFERRED_LENGTH(dw3),
1060                                         qtd->length, done_map,
1061                                         (1 << queue_entry));
1062
1063                         /* RL counter = ERR counter */
1064                         dw3 &= ~(0xf << 19);
1065                         dw3 |= rl << 19;
1066                         dw3 &= ~(3 << (55 - 32));
1067                         dw3 |= ERR_COUNTER << (55 - 32);
1068
1069                         /*
1070                          * It is not needed to write skip map back because it
1071                          * is unchanged. Just make sure that this entry is
1072                          * unskipped once it gets written to the HW.
1073                          */
1074                         skip_map &= ~(1 << queue_entry);
1075                         or_map = isp1760_readl(usb_hcd->regs +
1076                                         HC_ATL_IRQ_MASK_OR_REG);
1077                         or_map |= 1 << queue_entry;
1078                         isp1760_writel(or_map, usb_hcd->regs +
1079                                         HC_ATL_IRQ_MASK_OR_REG);
1080
1081                         ptd.dw3 = cpu_to_le32(dw3);
1082                         priv_write_copy(priv, (u32 *)&ptd, usb_hcd->regs +
1083                                         atl_regs, sizeof(ptd));
1084
1085                         ptd.dw0 |= cpu_to_le32(PTD_VALID);
1086                         priv_write_copy(priv, (u32 *)&ptd, usb_hcd->regs +
1087                                         atl_regs, sizeof(ptd));
1088
1089                         buffstatus = isp1760_readl(usb_hcd->regs +
1090                                         HC_BUFFER_STATUS_REG);
1091                         buffstatus |= ATL_BUFFER;
1092                         isp1760_writel(buffstatus, usb_hcd->regs +
1093                                         HC_BUFFER_STATUS_REG);
1094                         continue;
1095                 }
1096
1097                 error = check_error(&ptd);
1098                 if (error) {
1099                         status = error;
1100                         priv->atl_ints[queue_entry].qh->toggle = 0;
1101                         priv->atl_ints[queue_entry].qh->ping = 0;
1102                         urb->status = -EPIPE;
1103
1104 #if 0
1105                         printk(KERN_ERR "Error in %s().\n", __func__);
1106                         printk(KERN_ERR "IN dw0: %08x dw1: %08x dw2: %08x "
1107                                         "dw3: %08x dw4: %08x dw5: %08x dw6: "
1108                                         "%08x dw7: %08x\n",
1109                                         ptd.dw0, ptd.dw1, ptd.dw2, ptd.dw3,
1110                                         ptd.dw4, ptd.dw5, ptd.dw6, ptd.dw7);
1111 #endif
1112                 } else {
1113                         if (usb_pipetype(urb->pipe) == PIPE_BULK) {
1114                                 priv->atl_ints[queue_entry].qh->toggle = dw3 &
1115                                         (1 << 25);
1116                                 priv->atl_ints[queue_entry].qh->ping = dw3 &
1117                                         (1 << 26);
1118                         }
1119                 }
1120
1121                 length = PTD_XFERRED_LENGTH(dw3);
1122                 if (length) {
1123                         switch (DW1_GET_PID(dw1)) {
1124                         case IN_PID:
1125                                 priv_read_copy(priv,
1126                                         priv->atl_ints[queue_entry].data_buffer,
1127                                         usb_hcd->regs + payload + ISP_BANK(1),
1128                                         length);
1129
1130                         case OUT_PID:
1131
1132                                 urb->actual_length += length;
1133
1134                         case SETUP_PID:
1135                                 break;
1136                         }
1137                 }
1138
1139                 priv->atl_ints[queue_entry].data_buffer = NULL;
1140                 priv->atl_ints[queue_entry].urb = NULL;
1141                 priv->atl_ints[queue_entry].qtd = NULL;
1142                 priv->atl_ints[queue_entry].qh = NULL;
1143
1144                 free_mem(priv, payload);
1145
1146                 isp1760_writel(skip_map, usb_hcd->regs +
1147                                 HC_ATL_PTD_SKIPMAP_REG);
1148
1149                 if (urb->status == -EPIPE) {
1150                         /* HALT was received */
1151
1152                         qtd = clean_up_qtdlist(qtd);
1153                         isp1760_urb_done(priv, urb, urb->status);
1154
1155                 } else if (usb_pipebulk(urb->pipe) && (length < qtd->length)) {
1156                         /* short BULK received */
1157
1158                         if (urb->transfer_flags & URB_SHORT_NOT_OK) {
1159                                 urb->status = -EREMOTEIO;
1160                                 isp1760_dbg(priv, "short bulk, %d instead %zu "
1161                                         "with URB_SHORT_NOT_OK flag.\n",
1162                                         length, qtd->length);
1163                         }
1164
1165                         if (urb->status == -EINPROGRESS)
1166                                 urb->status = 0;
1167
1168                         qtd = clean_up_qtdlist(qtd);
1169
1170                         isp1760_urb_done(priv, urb, urb->status);
1171
1172                 } else if (qtd->status & URB_COMPLETE_NOTIFY) {
1173                         /* that was the last qtd of that URB */
1174
1175                         if (urb->status == -EINPROGRESS)
1176                                 urb->status = 0;
1177
1178                         qtd = clean_this_qtd(qtd);
1179                         isp1760_urb_done(priv, urb, urb->status);
1180
1181                 } else {
1182                         /* next QTD of this URB */
1183
1184                         qtd = clean_this_qtd(qtd);
1185                         BUG_ON(!qtd);
1186                 }
1187
1188                 if (qtd)
1189                         enqueue_an_ATL_packet(usb_hcd, qh, qtd);
1190
1191                 skip_map = isp1760_readl(usb_hcd->regs +
1192                                 HC_ATL_PTD_SKIPMAP_REG);
1193         }
1194 }
1195
1196 static void do_intl_int(struct usb_hcd *usb_hcd)
1197 {
1198         struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
1199         u32 done_map, skip_map;
1200         struct ptd ptd;
1201         struct urb *urb = NULL;
1202         u32 int_regs;
1203         u32 int_regs_base;
1204         u32 payload;
1205         u32 length;
1206         u32 or_map;
1207         int error;
1208         u32 queue_entry;
1209         struct isp1760_qtd *qtd;
1210         struct isp1760_qh *qh;
1211
1212         done_map = isp1760_readl(usb_hcd->regs +
1213                         HC_INT_PTD_DONEMAP_REG);
1214         skip_map = isp1760_readl(usb_hcd->regs +
1215                         HC_INT_PTD_SKIPMAP_REG);
1216
1217         or_map = isp1760_readl(usb_hcd->regs + HC_INT_IRQ_MASK_OR_REG);
1218         or_map &= ~done_map;
1219         isp1760_writel(or_map, usb_hcd->regs + HC_INT_IRQ_MASK_OR_REG);
1220
1221         int_regs_base = INT_REGS_OFFSET;
1222
1223         while (done_map) {
1224                 u32 dw1;
1225                 u32 dw3;
1226
1227                 queue_entry = __ffs(done_map);
1228                 done_map &= ~(1 << queue_entry);
1229                 skip_map |= 1 << queue_entry;
1230
1231                 int_regs = int_regs_base + queue_entry * sizeof(struct ptd);
1232                 urb = priv->int_ints[queue_entry].urb;
1233                 qtd = priv->int_ints[queue_entry].qtd;
1234                 qh = priv->int_ints[queue_entry].qh;
1235                 payload = priv->int_ints[queue_entry].payload;
1236
1237                 if (!qh) {
1238                         printk(KERN_ERR "(INT) qh is 0\n");
1239                         continue;
1240                 }
1241
1242                 isp1760_writel(int_regs + ISP_BANK(0), usb_hcd->regs +
1243                                 HC_MEMORY_REG);
1244                 isp1760_writel(payload  + ISP_BANK(1), usb_hcd->regs +
1245                                 HC_MEMORY_REG);
1246                 /*
1247                  * write bank1 address twice to ensure the 90ns delay (time
1248                  * between BANK0 write and the priv_read_copy() call is at
1249                  * least 3*t_WHWL + 2*t_w11 = 3*25ns + 2*17ns = 92ns)
1250                  */
1251                 isp1760_writel(payload  + ISP_BANK(1), usb_hcd->regs +
1252                                 HC_MEMORY_REG);
1253
1254                 priv_read_copy(priv, (u32 *)&ptd, usb_hcd->regs + int_regs +
1255                                 ISP_BANK(0), sizeof(ptd));
1256                 dw1 = le32_to_cpu(ptd.dw1);
1257                 dw3 = le32_to_cpu(ptd.dw3);
1258                 check_int_err_status(le32_to_cpu(ptd.dw4));
1259
1260                 error = check_error(&ptd);
1261                 if (error) {
1262 #if 0
1263                         printk(KERN_ERR "Error in %s().\n", __func__);
1264                         printk(KERN_ERR "IN dw0: %08x dw1: %08x dw2: %08x "
1265                                         "dw3: %08x dw4: %08x dw5: %08x dw6: "
1266                                         "%08x dw7: %08x\n",
1267                                         ptd.dw0, ptd.dw1, ptd.dw2, ptd.dw3,
1268                                         ptd.dw4, ptd.dw5, ptd.dw6, ptd.dw7);
1269 #endif
1270                         urb->status = -EPIPE;
1271                         priv->int_ints[queue_entry].qh->toggle = 0;
1272                         priv->int_ints[queue_entry].qh->ping = 0;
1273
1274                 } else {
1275                         priv->int_ints[queue_entry].qh->toggle =
1276                                 dw3 & (1 << 25);
1277                         priv->int_ints[queue_entry].qh->ping = dw3 & (1 << 26);
1278                 }
1279
1280                 if (urb->dev->speed != USB_SPEED_HIGH)
1281                         length = PTD_XFERRED_LENGTH_LO(dw3);
1282                 else
1283                         length = PTD_XFERRED_LENGTH(dw3);
1284
1285                 if (length) {
1286                         switch (DW1_GET_PID(dw1)) {
1287                         case IN_PID:
1288                                 priv_read_copy(priv,
1289                                         priv->int_ints[queue_entry].data_buffer,
1290                                         usb_hcd->regs + payload + ISP_BANK(1),
1291                                         length);
1292                         case OUT_PID:
1293
1294                                 urb->actual_length += length;
1295
1296                         case SETUP_PID:
1297                                 break;
1298                         }
1299                 }
1300
1301                 priv->int_ints[queue_entry].data_buffer = NULL;
1302                 priv->int_ints[queue_entry].urb = NULL;
1303                 priv->int_ints[queue_entry].qtd = NULL;
1304                 priv->int_ints[queue_entry].qh = NULL;
1305
1306                 isp1760_writel(skip_map, usb_hcd->regs +
1307                                 HC_INT_PTD_SKIPMAP_REG);
1308                 free_mem(priv, payload);
1309
1310                 if (urb->status == -EPIPE) {
1311                         /* HALT received */
1312
1313                          qtd = clean_up_qtdlist(qtd);
1314                          isp1760_urb_done(priv, urb, urb->status);
1315
1316                 } else if (qtd->status & URB_COMPLETE_NOTIFY) {
1317
1318                         if (urb->status == -EINPROGRESS)
1319                                 urb->status = 0;
1320
1321                         qtd = clean_this_qtd(qtd);
1322                         isp1760_urb_done(priv, urb, urb->status);
1323
1324                 } else {
1325                         /* next QTD of this URB */
1326
1327                         qtd = clean_this_qtd(qtd);
1328                         BUG_ON(!qtd);
1329                 }
1330
1331                 if (qtd)
1332                         enqueue_an_INT_packet(usb_hcd, qh, qtd);
1333
1334                 skip_map = isp1760_readl(usb_hcd->regs +
1335                                 HC_INT_PTD_SKIPMAP_REG);
1336         }
1337 }
1338
1339 #define max_packet(wMaxPacketSize) ((wMaxPacketSize) & 0x07ff)
1340 static struct isp1760_qh *qh_make(struct isp1760_hcd *priv, struct urb *urb,
1341                 gfp_t flags)
1342 {
1343         struct isp1760_qh *qh;
1344         int is_input, type;
1345
1346         qh = isp1760_qh_alloc(priv, flags);
1347         if (!qh)
1348                 return qh;
1349
1350         /*
1351          * init endpoint/device data for this QH
1352          */
1353         is_input = usb_pipein(urb->pipe);
1354         type = usb_pipetype(urb->pipe);
1355
1356         if (type == PIPE_INTERRUPT) {
1357
1358                 if (urb->dev->speed == USB_SPEED_HIGH) {
1359
1360                         qh->period = urb->interval >> 3;
1361                         if (qh->period == 0 && urb->interval != 1) {
1362                                 /* NOTE interval 2 or 4 uframes could work.
1363                                  * But interval 1 scheduling is simpler, and
1364                                  * includes high bandwidth.
1365                                  */
1366                                 printk(KERN_ERR "intr period %d uframes, NYET!",
1367                                                 urb->interval);
1368                                 qh_destroy(qh);
1369                                 return NULL;
1370                         }
1371                 } else {
1372                         qh->period = urb->interval;
1373                 }
1374         }
1375
1376         /* support for tt scheduling, and access to toggles */
1377         qh->dev = urb->dev;
1378
1379         if (!usb_pipecontrol(urb->pipe))
1380                 usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe), !is_input,
1381                                 1);
1382         return qh;
1383 }
1384
1385 /*
1386  * For control/bulk/interrupt, return QH with these TDs appended.
1387  * Allocates and initializes the QH if necessary.
1388  * Returns null if it can't allocate a QH it needs to.
1389  * If the QH has TDs (urbs) already, that's great.
1390  */
1391 static struct isp1760_qh *qh_append_tds(struct isp1760_hcd *priv,
1392                 struct urb *urb, struct list_head *qtd_list, int epnum,
1393                 void **ptr)
1394 {
1395         struct isp1760_qh *qh;
1396         struct isp1760_qtd *qtd;
1397         struct isp1760_qtd *prev_qtd;
1398
1399         qh = (struct isp1760_qh *)*ptr;
1400         if (!qh) {
1401                 /* can't sleep here, we have priv->lock... */
1402                 qh = qh_make(priv, urb, GFP_ATOMIC);
1403                 if (!qh)
1404                         return qh;
1405                 *ptr = qh;
1406         }
1407
1408         qtd = list_entry(qtd_list->next, struct isp1760_qtd,
1409                         qtd_list);
1410         if (!list_empty(&qh->qtd_list))
1411                 prev_qtd = list_entry(qh->qtd_list.prev,
1412                                 struct isp1760_qtd, qtd_list);
1413         else
1414                 prev_qtd = NULL;
1415
1416         list_splice(qtd_list, qh->qtd_list.prev);
1417         if (prev_qtd) {
1418                 BUG_ON(prev_qtd->hw_next);
1419                 prev_qtd->hw_next = qtd;
1420         }
1421
1422         urb->hcpriv = qh;
1423         return qh;
1424 }
1425
1426 static void qtd_list_free(struct isp1760_hcd *priv, struct urb *urb,
1427                 struct list_head *qtd_list)
1428 {
1429         struct list_head *entry, *temp;
1430
1431         list_for_each_safe(entry, temp, qtd_list) {
1432                 struct isp1760_qtd      *qtd;
1433
1434                 qtd = list_entry(entry, struct isp1760_qtd, qtd_list);
1435                 list_del(&qtd->qtd_list);
1436                 isp1760_qtd_free(qtd);
1437         }
1438 }
1439
1440 static int isp1760_prepare_enqueue(struct isp1760_hcd *priv, struct urb *urb,
1441                 struct list_head *qtd_list, gfp_t mem_flags, packet_enqueue *p)
1442 {
1443         struct isp1760_qtd         *qtd;
1444         int                     epnum;
1445         unsigned long           flags;
1446         struct isp1760_qh          *qh = NULL;
1447         int                     rc;
1448         int qh_busy;
1449
1450         qtd = list_entry(qtd_list->next, struct isp1760_qtd, qtd_list);
1451         epnum = urb->ep->desc.bEndpointAddress;
1452
1453         spin_lock_irqsave(&priv->lock, flags);
1454         if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &priv_to_hcd(priv)->flags)) {
1455                 rc = -ESHUTDOWN;
1456                 goto done;
1457         }
1458         rc = usb_hcd_link_urb_to_ep(priv_to_hcd(priv), urb);
1459         if (rc)
1460                 goto done;
1461
1462         qh = urb->ep->hcpriv;
1463         if (qh)
1464                 qh_busy = !list_empty(&qh->qtd_list);
1465         else
1466                 qh_busy = 0;
1467
1468         qh = qh_append_tds(priv, urb, qtd_list, epnum, &urb->ep->hcpriv);
1469         if (!qh) {
1470                 usb_hcd_unlink_urb_from_ep(priv_to_hcd(priv), urb);
1471                 rc = -ENOMEM;
1472                 goto done;
1473         }
1474
1475         if (!qh_busy)
1476                 p(priv_to_hcd(priv), qh, qtd);
1477
1478 done:
1479         spin_unlock_irqrestore(&priv->lock, flags);
1480         if (!qh)
1481                 qtd_list_free(priv, urb, qtd_list);
1482         return rc;
1483 }
1484
1485 static struct isp1760_qtd *isp1760_qtd_alloc(struct isp1760_hcd *priv,
1486                 gfp_t flags)
1487 {
1488         struct isp1760_qtd *qtd;
1489
1490         qtd = kmem_cache_zalloc(qtd_cachep, flags);
1491         if (qtd)
1492                 INIT_LIST_HEAD(&qtd->qtd_list);
1493
1494         return qtd;
1495 }
1496
1497 /*
1498  * create a list of filled qtds for this URB; won't link into qh.
1499  */
1500 static struct list_head *qh_urb_transaction(struct isp1760_hcd *priv,
1501                 struct urb *urb, struct list_head *head, gfp_t flags)
1502 {
1503         struct isp1760_qtd *qtd, *qtd_prev;
1504         void *buf;
1505         int len, maxpacket;
1506         int is_input;
1507         u32 token;
1508
1509         /*
1510          * URBs map to sequences of QTDs:  one logical transaction
1511          */
1512         qtd = isp1760_qtd_alloc(priv, flags);
1513         if (!qtd)
1514                 return NULL;
1515
1516         list_add_tail(&qtd->qtd_list, head);
1517         qtd->urb = urb;
1518         urb->status = -EINPROGRESS;
1519
1520         token = 0;
1521         /* for split transactions, SplitXState initialized to zero */
1522
1523         len = urb->transfer_buffer_length;
1524         is_input = usb_pipein(urb->pipe);
1525         if (usb_pipecontrol(urb->pipe)) {
1526                 /* SETUP pid */
1527                 qtd_fill(qtd, urb->setup_packet,
1528                                 sizeof(struct usb_ctrlrequest),
1529                                 token | SETUP_PID);
1530
1531                 /* ... and always at least one more pid */
1532                 token ^= DATA_TOGGLE;
1533                 qtd_prev = qtd;
1534                 qtd = isp1760_qtd_alloc(priv, flags);
1535                 if (!qtd)
1536                         goto cleanup;
1537                 qtd->urb = urb;
1538                 qtd_prev->hw_next = qtd;
1539                 list_add_tail(&qtd->qtd_list, head);
1540
1541                 /* for zero length DATA stages, STATUS is always IN */
1542                 if (len == 0)
1543                         token |= IN_PID;
1544         }
1545
1546         /*
1547          * data transfer stage:  buffer setup
1548          */
1549         buf = urb->transfer_buffer;
1550
1551         if (is_input)
1552                 token |= IN_PID;
1553         else
1554                 token |= OUT_PID;
1555
1556         maxpacket = max_packet(usb_maxpacket(urb->dev, urb->pipe, !is_input));
1557
1558         /*
1559          * buffer gets wrapped in one or more qtds;
1560          * last one may be "short" (including zero len)
1561          * and may serve as a control status ack
1562          */
1563         for (;;) {
1564                 int this_qtd_len;
1565
1566                 if (!buf && len) {
1567                         /* XXX This looks like usb storage / SCSI bug */
1568                         printk(KERN_ERR "buf is null, dma is %08lx len is %d\n",
1569                                         (long unsigned)urb->transfer_dma, len);
1570                         WARN_ON(1);
1571                 }
1572
1573                 this_qtd_len = qtd_fill(qtd, buf, len, token);
1574                 len -= this_qtd_len;
1575                 buf += this_qtd_len;
1576
1577                 /* qh makes control packets use qtd toggle; maybe switch it */
1578                 if ((maxpacket & (this_qtd_len + (maxpacket - 1))) == 0)
1579                         token ^= DATA_TOGGLE;
1580
1581                 if (len <= 0)
1582                         break;
1583
1584                 qtd_prev = qtd;
1585                 qtd = isp1760_qtd_alloc(priv, flags);
1586                 if (!qtd)
1587                         goto cleanup;
1588                 qtd->urb = urb;
1589                 qtd_prev->hw_next = qtd;
1590                 list_add_tail(&qtd->qtd_list, head);
1591         }
1592
1593         /*
1594          * control requests may need a terminating data "status" ack;
1595          * bulk ones may need a terminating short packet (zero length).
1596          */
1597         if (urb->transfer_buffer_length != 0) {
1598                 int one_more = 0;
1599
1600                 if (usb_pipecontrol(urb->pipe)) {
1601                         one_more = 1;
1602                         /* "in" <--> "out"  */
1603                         token ^= IN_PID;
1604                         /* force DATA1 */
1605                         token |= DATA_TOGGLE;
1606                 } else if (usb_pipebulk(urb->pipe)
1607                                 && (urb->transfer_flags & URB_ZERO_PACKET)
1608                                 && !(urb->transfer_buffer_length % maxpacket)) {
1609                         one_more = 1;
1610                 }
1611                 if (one_more) {
1612                         qtd_prev = qtd;
1613                         qtd = isp1760_qtd_alloc(priv, flags);
1614                         if (!qtd)
1615                                 goto cleanup;
1616                         qtd->urb = urb;
1617                         qtd_prev->hw_next = qtd;
1618                         list_add_tail(&qtd->qtd_list, head);
1619
1620                         /* never any data in such packets */
1621                         qtd_fill(qtd, NULL, 0, token);
1622                 }
1623         }
1624
1625         qtd->status = URB_COMPLETE_NOTIFY;
1626         return head;
1627
1628 cleanup:
1629         qtd_list_free(priv, urb, head);
1630         return NULL;
1631 }
1632
1633 static int isp1760_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
1634                 gfp_t mem_flags)
1635 {
1636         struct isp1760_hcd *priv = hcd_to_priv(hcd);
1637         struct list_head qtd_list;
1638         packet_enqueue *pe;
1639
1640         INIT_LIST_HEAD(&qtd_list);
1641
1642         switch (usb_pipetype(urb->pipe)) {
1643         case PIPE_CONTROL:
1644         case PIPE_BULK:
1645
1646                 if (!qh_urb_transaction(priv, urb, &qtd_list, mem_flags))
1647                         return -ENOMEM;
1648                 pe =  enqueue_an_ATL_packet;
1649                 break;
1650
1651         case PIPE_INTERRUPT:
1652                 if (!qh_urb_transaction(priv, urb, &qtd_list, mem_flags))
1653                         return -ENOMEM;
1654                 pe = enqueue_an_INT_packet;
1655                 break;
1656
1657         case PIPE_ISOCHRONOUS:
1658                 printk(KERN_ERR "PIPE_ISOCHRONOUS ain't supported\n");
1659         default:
1660                 return -EPIPE;
1661         }
1662
1663         return isp1760_prepare_enqueue(priv, urb, &qtd_list, mem_flags, pe);
1664 }
1665
1666 static int isp1760_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
1667                 int status)
1668 {
1669         struct isp1760_hcd *priv = hcd_to_priv(hcd);
1670         struct inter_packet_info *ints;
1671         u32 i;
1672         u32 reg_base, or_reg, skip_reg;
1673         unsigned long flags;
1674         struct ptd ptd;
1675         packet_enqueue *pe;
1676
1677         switch (usb_pipetype(urb->pipe)) {
1678         case PIPE_ISOCHRONOUS:
1679                 return -EPIPE;
1680                 break;
1681
1682         case PIPE_INTERRUPT:
1683                 ints = priv->int_ints;
1684                 reg_base = INT_REGS_OFFSET;
1685                 or_reg = HC_INT_IRQ_MASK_OR_REG;
1686                 skip_reg = HC_INT_PTD_SKIPMAP_REG;
1687                 pe = enqueue_an_INT_packet;
1688                 break;
1689
1690         default:
1691                 ints = priv->atl_ints;
1692                 reg_base = ATL_REGS_OFFSET;
1693                 or_reg = HC_ATL_IRQ_MASK_OR_REG;
1694                 skip_reg = HC_ATL_PTD_SKIPMAP_REG;
1695                 pe =  enqueue_an_ATL_packet;
1696                 break;
1697         }
1698
1699         memset(&ptd, 0, sizeof(ptd));
1700         spin_lock_irqsave(&priv->lock, flags);
1701
1702         for (i = 0; i < 32; i++) {
1703                 if (ints->urb == urb) {
1704                         u32 skip_map;
1705                         u32 or_map;
1706                         struct isp1760_qtd *qtd;
1707                         struct isp1760_qh *qh = ints->qh;
1708
1709                         skip_map = isp1760_readl(hcd->regs + skip_reg);
1710                         skip_map |= 1 << i;
1711                         isp1760_writel(skip_map, hcd->regs + skip_reg);
1712
1713                         or_map = isp1760_readl(hcd->regs + or_reg);
1714                         or_map &= ~(1 << i);
1715                         isp1760_writel(or_map, hcd->regs + or_reg);
1716
1717                         priv_write_copy(priv, (u32 *)&ptd, hcd->regs + reg_base
1718                                         + i * sizeof(ptd), sizeof(ptd));
1719                         qtd = ints->qtd;
1720                         qtd = clean_up_qtdlist(qtd);
1721
1722                         free_mem(priv, ints->payload);
1723
1724                         ints->urb = NULL;
1725                         ints->qh = NULL;
1726                         ints->qtd = NULL;
1727                         ints->data_buffer = NULL;
1728                         ints->payload = 0;
1729
1730                         isp1760_urb_done(priv, urb, status);
1731                         if (qtd)
1732                                 pe(hcd, qh, qtd);
1733                         break;
1734
1735                 } else if (ints->qtd) {
1736                         struct isp1760_qtd *qtd, *prev_qtd = ints->qtd;
1737
1738                         for (qtd = ints->qtd->hw_next; qtd; qtd = qtd->hw_next) {
1739                                 if (qtd->urb == urb) {
1740                                         prev_qtd->hw_next = clean_up_qtdlist(qtd);
1741                                         isp1760_urb_done(priv, urb, status);
1742                                         break;
1743                                 }
1744                                 prev_qtd = qtd;
1745                         }
1746                         /* we found the urb before the end of the list */
1747                         if (qtd)
1748                                 break;
1749                 }
1750                 ints++;
1751         }
1752
1753         spin_unlock_irqrestore(&priv->lock, flags);
1754         return 0;
1755 }
1756
1757 static irqreturn_t isp1760_irq(struct usb_hcd *usb_hcd)
1758 {
1759         struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
1760         u32 imask;
1761         irqreturn_t irqret = IRQ_NONE;
1762
1763         spin_lock(&priv->lock);
1764
1765         if (!(usb_hcd->state & HC_STATE_RUNNING))
1766                 goto leave;
1767
1768         imask = isp1760_readl(usb_hcd->regs + HC_INTERRUPT_REG);
1769         if (unlikely(!imask))
1770                 goto leave;
1771
1772         isp1760_writel(imask, usb_hcd->regs + HC_INTERRUPT_REG);
1773         if (imask & HC_ATL_INT)
1774                 do_atl_int(usb_hcd);
1775
1776         if (imask & HC_INTL_INT)
1777                 do_intl_int(usb_hcd);
1778
1779         irqret = IRQ_HANDLED;
1780 leave:
1781         spin_unlock(&priv->lock);
1782         return irqret;
1783 }
1784
1785 static int isp1760_hub_status_data(struct usb_hcd *hcd, char *buf)
1786 {
1787         struct isp1760_hcd *priv = hcd_to_priv(hcd);
1788         u32 temp, status = 0;
1789         u32 mask;
1790         int retval = 1;
1791         unsigned long flags;
1792
1793         /* if !USB_SUSPEND, root hub timers won't get shut down ... */
1794         if (!HC_IS_RUNNING(hcd->state))
1795                 return 0;
1796
1797         /* init status to no-changes */
1798         buf[0] = 0;
1799         mask = PORT_CSC;
1800
1801         spin_lock_irqsave(&priv->lock, flags);
1802         temp = isp1760_readl(hcd->regs + HC_PORTSC1);
1803
1804         if (temp & PORT_OWNER) {
1805                 if (temp & PORT_CSC) {
1806                         temp &= ~PORT_CSC;
1807                         isp1760_writel(temp, hcd->regs + HC_PORTSC1);
1808                         goto done;
1809                 }
1810         }
1811
1812         /*
1813          * Return status information even for ports with OWNER set.
1814          * Otherwise khubd wouldn't see the disconnect event when a
1815          * high-speed device is switched over to the companion
1816          * controller by the user.
1817          */
1818
1819         if ((temp & mask) != 0
1820                         || ((temp & PORT_RESUME) != 0
1821                                 && time_after_eq(jiffies,
1822                                         priv->reset_done))) {
1823                 buf [0] |= 1 << (0 + 1);
1824                 status = STS_PCD;
1825         }
1826         /* FIXME autosuspend idle root hubs */
1827 done:
1828         spin_unlock_irqrestore(&priv->lock, flags);
1829         return status ? retval : 0;
1830 }
1831
1832 static void isp1760_hub_descriptor(struct isp1760_hcd *priv,
1833                 struct usb_hub_descriptor *desc)
1834 {
1835         int ports = HCS_N_PORTS(priv->hcs_params);
1836         u16 temp;
1837
1838         desc->bDescriptorType = 0x29;
1839         /* priv 1.0, 2.3.9 says 20ms max */
1840         desc->bPwrOn2PwrGood = 10;
1841         desc->bHubContrCurrent = 0;
1842
1843         desc->bNbrPorts = ports;
1844         temp = 1 + (ports / 8);
1845         desc->bDescLength = 7 + 2 * temp;
1846
1847         /* two bitmaps:  ports removable, and usb 1.0 legacy PortPwrCtrlMask */
1848         memset(&desc->bitmap[0], 0, temp);
1849         memset(&desc->bitmap[temp], 0xff, temp);
1850
1851         /* per-port overcurrent reporting */
1852         temp = 0x0008;
1853         if (HCS_PPC(priv->hcs_params))
1854                 /* per-port power control */
1855                 temp |= 0x0001;
1856         else
1857                 /* no power switching */
1858                 temp |= 0x0002;
1859         desc->wHubCharacteristics = cpu_to_le16(temp);
1860 }
1861
1862 #define PORT_WAKE_BITS  (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
1863
1864 static int check_reset_complete(struct isp1760_hcd *priv, int index,
1865                 u32 __iomem *status_reg, int port_status)
1866 {
1867         if (!(port_status & PORT_CONNECT))
1868                 return port_status;
1869
1870         /* if reset finished and it's still not enabled -- handoff */
1871         if (!(port_status & PORT_PE)) {
1872
1873                 printk(KERN_ERR "port %d full speed --> companion\n",
1874                         index + 1);
1875
1876                 port_status |= PORT_OWNER;
1877                 port_status &= ~PORT_RWC_BITS;
1878                 isp1760_writel(port_status, status_reg);
1879
1880         } else
1881                 printk(KERN_ERR "port %d high speed\n", index + 1);
1882
1883         return port_status;
1884 }
1885
1886 static int isp1760_hub_control(struct usb_hcd *hcd, u16 typeReq,
1887                 u16 wValue, u16 wIndex, char *buf, u16 wLength)
1888 {
1889         struct isp1760_hcd *priv = hcd_to_priv(hcd);
1890         int ports = HCS_N_PORTS(priv->hcs_params);
1891         u32 __iomem *status_reg = hcd->regs + HC_PORTSC1;
1892         u32 temp, status;
1893         unsigned long flags;
1894         int retval = 0;
1895         unsigned selector;
1896
1897         /*
1898          * FIXME:  support SetPortFeatures USB_PORT_FEAT_INDICATOR.
1899          * HCS_INDICATOR may say we can change LEDs to off/amber/green.
1900          * (track current state ourselves) ... blink for diagnostics,
1901          * power, "this is the one", etc.  EHCI spec supports this.
1902          */
1903
1904         spin_lock_irqsave(&priv->lock, flags);
1905         switch (typeReq) {
1906         case ClearHubFeature:
1907                 switch (wValue) {
1908                 case C_HUB_LOCAL_POWER:
1909                 case C_HUB_OVER_CURRENT:
1910                         /* no hub-wide feature/status flags */
1911                         break;
1912                 default:
1913                         goto error;
1914                 }
1915                 break;
1916         case ClearPortFeature:
1917                 if (!wIndex || wIndex > ports)
1918                         goto error;
1919                 wIndex--;
1920                 temp = isp1760_readl(status_reg);
1921
1922                 /*
1923                  * Even if OWNER is set, so the port is owned by the
1924                  * companion controller, khubd needs to be able to clear
1925                  * the port-change status bits (especially
1926                  * USB_PORT_FEAT_C_CONNECTION).
1927                  */
1928
1929                 switch (wValue) {
1930                 case USB_PORT_FEAT_ENABLE:
1931                         isp1760_writel(temp & ~PORT_PE, status_reg);
1932                         break;
1933                 case USB_PORT_FEAT_C_ENABLE:
1934                         /* XXX error? */
1935                         break;
1936                 case USB_PORT_FEAT_SUSPEND:
1937                         if (temp & PORT_RESET)
1938                                 goto error;
1939
1940                         if (temp & PORT_SUSPEND) {
1941                                 if ((temp & PORT_PE) == 0)
1942                                         goto error;
1943                                 /* resume signaling for 20 msec */
1944                                 temp &= ~(PORT_RWC_BITS);
1945                                 isp1760_writel(temp | PORT_RESUME,
1946                                                 status_reg);
1947                                 priv->reset_done = jiffies +
1948                                         msecs_to_jiffies(20);
1949                         }
1950                         break;
1951                 case USB_PORT_FEAT_C_SUSPEND:
1952                         /* we auto-clear this feature */
1953                         break;
1954                 case USB_PORT_FEAT_POWER:
1955                         if (HCS_PPC(priv->hcs_params))
1956                                 isp1760_writel(temp & ~PORT_POWER, status_reg);
1957                         break;
1958                 case USB_PORT_FEAT_C_CONNECTION:
1959                         isp1760_writel(temp | PORT_CSC,
1960                                         status_reg);
1961                         break;
1962                 case USB_PORT_FEAT_C_OVER_CURRENT:
1963                         /* XXX error ?*/
1964                         break;
1965                 case USB_PORT_FEAT_C_RESET:
1966                         /* GetPortStatus clears reset */
1967                         break;
1968                 default:
1969                         goto error;
1970                 }
1971                 isp1760_readl(hcd->regs + HC_USBCMD);
1972                 break;
1973         case GetHubDescriptor:
1974                 isp1760_hub_descriptor(priv, (struct usb_hub_descriptor *)
1975                         buf);
1976                 break;
1977         case GetHubStatus:
1978                 /* no hub-wide feature/status flags */
1979                 memset(buf, 0, 4);
1980                 break;
1981         case GetPortStatus:
1982                 if (!wIndex || wIndex > ports)
1983                         goto error;
1984                 wIndex--;
1985                 status = 0;
1986                 temp = isp1760_readl(status_reg);
1987
1988                 /* wPortChange bits */
1989                 if (temp & PORT_CSC)
1990                         status |= 1 << USB_PORT_FEAT_C_CONNECTION;
1991
1992
1993                 /* whoever resumes must GetPortStatus to complete it!! */
1994                 if (temp & PORT_RESUME) {
1995                         printk(KERN_ERR "Port resume should be skipped.\n");
1996
1997                         /* Remote Wakeup received? */
1998                         if (!priv->reset_done) {
1999                                 /* resume signaling for 20 msec */
2000                                 priv->reset_done = jiffies
2001                                                 + msecs_to_jiffies(20);
2002                                 /* check the port again */
2003                                 mod_timer(&priv_to_hcd(priv)->rh_timer,
2004                                                 priv->reset_done);
2005                         }
2006
2007                         /* resume completed? */
2008                         else if (time_after_eq(jiffies,
2009                                         priv->reset_done)) {
2010                                 status |= 1 << USB_PORT_FEAT_C_SUSPEND;
2011                                 priv->reset_done = 0;
2012
2013                                 /* stop resume signaling */
2014                                 temp = isp1760_readl(status_reg);
2015                                 isp1760_writel(
2016                                         temp & ~(PORT_RWC_BITS | PORT_RESUME),
2017                                         status_reg);
2018                                 retval = handshake(priv, status_reg,
2019                                            PORT_RESUME, 0, 2000 /* 2msec */);
2020                                 if (retval != 0) {
2021                                         isp1760_err(priv,
2022                                                 "port %d resume error %d\n",
2023                                                 wIndex + 1, retval);
2024                                         goto error;
2025                                 }
2026                                 temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10));
2027                         }
2028                 }
2029
2030                 /* whoever resets must GetPortStatus to complete it!! */
2031                 if ((temp & PORT_RESET)
2032                                 && time_after_eq(jiffies,
2033                                         priv->reset_done)) {
2034                         status |= 1 << USB_PORT_FEAT_C_RESET;
2035                         priv->reset_done = 0;
2036
2037                         /* force reset to complete */
2038                         isp1760_writel(temp & ~PORT_RESET,
2039                                         status_reg);
2040                         /* REVISIT:  some hardware needs 550+ usec to clear
2041                          * this bit; seems too long to spin routinely...
2042                          */
2043                         retval = handshake(priv, status_reg,
2044                                         PORT_RESET, 0, 750);
2045                         if (retval != 0) {
2046                                 isp1760_err(priv, "port %d reset error %d\n",
2047                                                 wIndex + 1, retval);
2048                                 goto error;
2049                         }
2050
2051                         /* see what we found out */
2052                         temp = check_reset_complete(priv, wIndex, status_reg,
2053                                         isp1760_readl(status_reg));
2054                 }
2055                 /*
2056                  * Even if OWNER is set, there's no harm letting khubd
2057                  * see the wPortStatus values (they should all be 0 except
2058                  * for PORT_POWER anyway).
2059                  */
2060
2061                 if (temp & PORT_OWNER)
2062                         printk(KERN_ERR "Warning: PORT_OWNER is set\n");
2063
2064                 if (temp & PORT_CONNECT) {
2065                         status |= 1 << USB_PORT_FEAT_CONNECTION;
2066                         /* status may be from integrated TT */
2067                         status |= ehci_port_speed(priv, temp);
2068                 }
2069                 if (temp & PORT_PE)
2070                         status |= 1 << USB_PORT_FEAT_ENABLE;
2071                 if (temp & (PORT_SUSPEND|PORT_RESUME))
2072                         status |= 1 << USB_PORT_FEAT_SUSPEND;
2073                 if (temp & PORT_RESET)
2074                         status |= 1 << USB_PORT_FEAT_RESET;
2075                 if (temp & PORT_POWER)
2076                         status |= 1 << USB_PORT_FEAT_POWER;
2077
2078                 put_unaligned(cpu_to_le32(status), (__le32 *) buf);
2079                 break;
2080         case SetHubFeature:
2081                 switch (wValue) {
2082                 case C_HUB_LOCAL_POWER:
2083                 case C_HUB_OVER_CURRENT:
2084                         /* no hub-wide feature/status flags */
2085                         break;
2086                 default:
2087                         goto error;
2088                 }
2089                 break;
2090         case SetPortFeature:
2091                 selector = wIndex >> 8;
2092                 wIndex &= 0xff;
2093                 if (!wIndex || wIndex > ports)
2094                         goto error;
2095                 wIndex--;
2096                 temp = isp1760_readl(status_reg);
2097                 if (temp & PORT_OWNER)
2098                         break;
2099
2100 /*              temp &= ~PORT_RWC_BITS; */
2101                 switch (wValue) {
2102                 case USB_PORT_FEAT_ENABLE:
2103                         isp1760_writel(temp | PORT_PE, status_reg);
2104                         break;
2105
2106                 case USB_PORT_FEAT_SUSPEND:
2107                         if ((temp & PORT_PE) == 0
2108                                         || (temp & PORT_RESET) != 0)
2109                                 goto error;
2110
2111                         isp1760_writel(temp | PORT_SUSPEND, status_reg);
2112                         break;
2113                 case USB_PORT_FEAT_POWER:
2114                         if (HCS_PPC(priv->hcs_params))
2115                                 isp1760_writel(temp | PORT_POWER,
2116                                                 status_reg);
2117                         break;
2118                 case USB_PORT_FEAT_RESET:
2119                         if (temp & PORT_RESUME)
2120                                 goto error;
2121                         /* line status bits may report this as low speed,
2122                          * which can be fine if this root hub has a
2123                          * transaction translator built in.
2124                          */
2125                         if ((temp & (PORT_PE|PORT_CONNECT)) == PORT_CONNECT
2126                                         && PORT_USB11(temp)) {
2127                                 temp |= PORT_OWNER;
2128                         } else {
2129                                 temp |= PORT_RESET;
2130                                 temp &= ~PORT_PE;
2131
2132                                 /*
2133                                  * caller must wait, then call GetPortStatus
2134                                  * usb 2.0 spec says 50 ms resets on root
2135                                  */
2136                                 priv->reset_done = jiffies +
2137                                         msecs_to_jiffies(50);
2138                         }
2139                         isp1760_writel(temp, status_reg);
2140                         break;
2141                 default:
2142                         goto error;
2143                 }
2144                 isp1760_readl(hcd->regs + HC_USBCMD);
2145                 break;
2146
2147         default:
2148 error:
2149                 /* "stall" on error */
2150                 retval = -EPIPE;
2151         }
2152         spin_unlock_irqrestore(&priv->lock, flags);
2153         return retval;
2154 }
2155
2156 static void isp1760_endpoint_disable(struct usb_hcd *usb_hcd,
2157                 struct usb_host_endpoint *ep)
2158 {
2159         struct isp1760_hcd *priv = hcd_to_priv(usb_hcd);
2160         struct isp1760_qh *qh;
2161         struct isp1760_qtd *qtd;
2162         unsigned long flags;
2163
2164         spin_lock_irqsave(&priv->lock, flags);
2165         qh = ep->hcpriv;
2166         if (!qh)
2167                 goto out;
2168
2169         ep->hcpriv = NULL;
2170         do {
2171                 /* more than entry might get removed */
2172                 if (list_empty(&qh->qtd_list))
2173                         break;
2174
2175                 qtd = list_first_entry(&qh->qtd_list, struct isp1760_qtd,
2176                                 qtd_list);
2177
2178                 if (qtd->status & URB_ENQUEUED) {
2179
2180                         spin_unlock_irqrestore(&priv->lock, flags);
2181                         isp1760_urb_dequeue(usb_hcd, qtd->urb, -ECONNRESET);
2182                         spin_lock_irqsave(&priv->lock, flags);
2183                 } else {
2184                         struct urb *urb;
2185
2186                         urb = qtd->urb;
2187                         clean_up_qtdlist(qtd);
2188                         isp1760_urb_done(priv, urb, -ECONNRESET);
2189                 }
2190         } while (1);
2191
2192         qh_destroy(qh);
2193         /* remove requests and leak them.
2194          * ATL are pretty fast done, INT could take a while...
2195          * The latter shoule be removed
2196          */
2197 out:
2198         spin_unlock_irqrestore(&priv->lock, flags);
2199 }
2200
2201 static int isp1760_get_frame(struct usb_hcd *hcd)
2202 {
2203         struct isp1760_hcd *priv = hcd_to_priv(hcd);
2204         u32 fr;
2205
2206         fr = isp1760_readl(hcd->regs + HC_FRINDEX);
2207         return (fr >> 3) % priv->periodic_size;
2208 }
2209
2210 static void isp1760_stop(struct usb_hcd *hcd)
2211 {
2212         struct isp1760_hcd *priv = hcd_to_priv(hcd);
2213         u32 temp;
2214
2215         isp1760_hub_control(hcd, ClearPortFeature, USB_PORT_FEAT_POWER, 1,
2216                         NULL, 0);
2217         mdelay(20);
2218
2219         spin_lock_irq(&priv->lock);
2220         ehci_reset(priv);
2221         /* Disable IRQ */
2222         temp = isp1760_readl(hcd->regs + HC_HW_MODE_CTRL);
2223         isp1760_writel(temp &= ~HW_GLOBAL_INTR_EN, hcd->regs + HC_HW_MODE_CTRL);
2224         spin_unlock_irq(&priv->lock);
2225
2226         isp1760_writel(0, hcd->regs + HC_CONFIGFLAG);
2227 }
2228
2229 static void isp1760_shutdown(struct usb_hcd *hcd)
2230 {
2231         u32 command, temp;
2232
2233         isp1760_stop(hcd);
2234         temp = isp1760_readl(hcd->regs + HC_HW_MODE_CTRL);
2235         isp1760_writel(temp &= ~HW_GLOBAL_INTR_EN, hcd->regs + HC_HW_MODE_CTRL);
2236
2237         command = isp1760_readl(hcd->regs + HC_USBCMD);
2238         command &= ~CMD_RUN;
2239         isp1760_writel(command, hcd->regs + HC_USBCMD);
2240 }
2241
2242 static const struct hc_driver isp1760_hc_driver = {
2243         .description            = "isp1760-hcd",
2244         .product_desc           = "NXP ISP1760 USB Host Controller",
2245         .hcd_priv_size          = sizeof(struct isp1760_hcd),
2246         .irq                    = isp1760_irq,
2247         .flags                  = HCD_MEMORY | HCD_USB2,
2248         .reset                  = isp1760_hc_setup,
2249         .start                  = isp1760_run,
2250         .stop                   = isp1760_stop,
2251         .shutdown               = isp1760_shutdown,
2252         .urb_enqueue            = isp1760_urb_enqueue,
2253         .urb_dequeue            = isp1760_urb_dequeue,
2254         .endpoint_disable       = isp1760_endpoint_disable,
2255         .get_frame_number       = isp1760_get_frame,
2256         .hub_status_data        = isp1760_hub_status_data,
2257         .hub_control            = isp1760_hub_control,
2258 };
2259
2260 int __init init_kmem_once(void)
2261 {
2262         qtd_cachep = kmem_cache_create("isp1760_qtd",
2263                         sizeof(struct isp1760_qtd), 0, SLAB_TEMPORARY |
2264                         SLAB_MEM_SPREAD, NULL);
2265
2266         if (!qtd_cachep)
2267                 return -ENOMEM;
2268
2269         qh_cachep = kmem_cache_create("isp1760_qh", sizeof(struct isp1760_qh),
2270                         0, SLAB_TEMPORARY | SLAB_MEM_SPREAD, NULL);
2271
2272         if (!qh_cachep) {
2273                 kmem_cache_destroy(qtd_cachep);
2274                 return -ENOMEM;
2275         }
2276
2277         return 0;
2278 }
2279
2280 void deinit_kmem_cache(void)
2281 {
2282         kmem_cache_destroy(qtd_cachep);
2283         kmem_cache_destroy(qh_cachep);
2284 }
2285
2286 struct usb_hcd *isp1760_register(phys_addr_t res_start, resource_size_t res_len,
2287                                  int irq, unsigned long irqflags,
2288                                  struct device *dev, const char *busname,
2289                                  unsigned int devflags)
2290 {
2291         struct usb_hcd *hcd;
2292         struct isp1760_hcd *priv;
2293         int ret;
2294
2295         if (usb_disabled())
2296                 return ERR_PTR(-ENODEV);
2297
2298         /* prevent usb-core allocating DMA pages */
2299         dev->dma_mask = NULL;
2300
2301         hcd = usb_create_hcd(&isp1760_hc_driver, dev, dev_name(dev));
2302         if (!hcd)
2303                 return ERR_PTR(-ENOMEM);
2304
2305         priv = hcd_to_priv(hcd);
2306         priv->devflags = devflags;
2307         init_memory(priv);
2308         hcd->regs = ioremap(res_start, res_len);
2309         if (!hcd->regs) {
2310                 ret = -EIO;
2311                 goto err_put;
2312         }
2313
2314         hcd->irq = irq;
2315         hcd->rsrc_start = res_start;
2316         hcd->rsrc_len = res_len;
2317
2318         ret = usb_add_hcd(hcd, irq, irqflags);
2319         if (ret)
2320                 goto err_unmap;
2321
2322         return hcd;
2323
2324 err_unmap:
2325          iounmap(hcd->regs);
2326
2327 err_put:
2328          usb_put_hcd(hcd);
2329
2330          return ERR_PTR(ret);
2331 }
2332
2333 MODULE_DESCRIPTION("Driver for the ISP1760 USB-controller from NXP");
2334 MODULE_AUTHOR("Sebastian Siewior <bigeasy@linuxtronix.de>");
2335 MODULE_LICENSE("GPL v2");