drivers/usb/gadget/udc/renesas_usb3.c

   1 /*
   2  * Renesas USB3.0 Peripheral driver (USB gadget)
   3  *
   4  * Copyright (C) 2015  Renesas Electronics Corporation
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; version 2 of the License.
   9  */
  10
  11 #include <linux/delay.h>
  12 #include <linux/err.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/io.h>
  15 #include <linux/module.h>
  16 #include <linux/of_device.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/pm_runtime.h>
  19 #include <linux/sizes.h>
  20 #include <linux/slab.h>
  21 #include <linux/usb/ch9.h>
  22 #include <linux/usb/gadget.h>
  23
  24 /* register definitions */
  25 #define USB3_AXI_INT_STA        0x008
  26 #define USB3_AXI_INT_ENA        0x00c
  27 #define USB3_DMA_INT_STA        0x010
  28 #define USB3_DMA_INT_ENA        0x014
  29 #define USB3_USB_COM_CON        0x200
  30 #define USB3_USB20_CON          0x204
  31 #define USB3_USB30_CON          0x208
  32 #define USB3_USB_STA            0x210
  33 #define USB3_DRD_CON            0x218
  34 #define USB3_USB_INT_STA_1      0x220
  35 #define USB3_USB_INT_STA_2      0x224
  36 #define USB3_USB_INT_ENA_1      0x228
  37 #define USB3_USB_INT_ENA_2      0x22c
  38 #define USB3_STUP_DAT_0         0x230
  39 #define USB3_STUP_DAT_1         0x234
  40 #define USB3_P0_MOD             0x280
  41 #define USB3_P0_CON             0x288
  42 #define USB3_P0_STA             0x28c
  43 #define USB3_P0_INT_STA         0x290
  44 #define USB3_P0_INT_ENA         0x294
  45 #define USB3_P0_LNG             0x2a0
  46 #define USB3_P0_READ            0x2a4
  47 #define USB3_P0_WRITE           0x2a8
  48 #define USB3_PIPE_COM           0x2b0
  49 #define USB3_PN_MOD             0x2c0
  50 #define USB3_PN_RAMMAP          0x2c4
  51 #define USB3_PN_CON             0x2c8
  52 #define USB3_PN_STA             0x2cc
  53 #define USB3_PN_INT_STA         0x2d0
  54 #define USB3_PN_INT_ENA         0x2d4
  55 #define USB3_PN_LNG             0x2e0
  56 #define USB3_PN_READ            0x2e4
  57 #define USB3_PN_WRITE           0x2e8
  58 #define USB3_SSIFCMD            0x340
  59
  60 /* AXI_INT_ENA and AXI_INT_STA */
  61 #define AXI_INT_DMAINT          BIT(31)
  62 #define AXI_INT_EPCINT          BIT(30)
  63
  64 /* LCLKSEL */
  65 #define LCLKSEL_LSEL            BIT(18)
  66
  67 /* USB_COM_CON */
  68 #define USB_COM_CON_CONF                BIT(24)
  69 #define USB_COM_CON_SPD_MODE            BIT(17)
  70 #define USB_COM_CON_EP0_EN              BIT(16)
  71 #define USB_COM_CON_DEV_ADDR_SHIFT      8
  72 #define USB_COM_CON_DEV_ADDR_MASK       GENMASK(14, USB_COM_CON_DEV_ADDR_SHIFT)
  73 #define USB_COM_CON_DEV_ADDR(n)         (((n) << USB_COM_CON_DEV_ADDR_SHIFT) & \
  74                                          USB_COM_CON_DEV_ADDR_MASK)
  75 #define USB_COM_CON_RX_DETECTION        BIT(1)
  76 #define USB_COM_CON_PIPE_CLR            BIT(0)
  77
  78 /* USB20_CON */
  79 #define USB20_CON_B2_PUE                BIT(31)
  80 #define USB20_CON_B2_SUSPEND            BIT(24)
  81 #define USB20_CON_B2_CONNECT            BIT(17)
  82 #define USB20_CON_B2_TSTMOD_SHIFT       8
  83 #define USB20_CON_B2_TSTMOD_MASK        GENMASK(10, USB20_CON_B2_TSTMOD_SHIFT)
  84 #define USB20_CON_B2_TSTMOD(n)          (((n) << USB20_CON_B2_TSTMOD_SHIFT) & \
  85                                          USB20_CON_B2_TSTMOD_MASK)
  86 #define USB20_CON_B2_TSTMOD_EN          BIT(0)
  87
  88 /* USB30_CON */
  89 #define USB30_CON_POW_SEL_SHIFT         24
  90 #define USB30_CON_POW_SEL_MASK          GENMASK(26, USB30_CON_POW_SEL_SHIFT)
  91 #define USB30_CON_POW_SEL_IN_U3         BIT(26)
  92 #define USB30_CON_POW_SEL_IN_DISCON     0
  93 #define USB30_CON_POW_SEL_P2_TO_P0      BIT(25)
  94 #define USB30_CON_POW_SEL_P0_TO_P3      BIT(24)
  95 #define USB30_CON_POW_SEL_P0_TO_P2      0
  96 #define USB30_CON_B3_PLLWAKE            BIT(23)
  97 #define USB30_CON_B3_CONNECT            BIT(17)
  98 #define USB30_CON_B3_HOTRST_CMP         BIT(1)
  99
 100 /* USB_STA */
 101 #define USB_STA_SPEED_MASK      (BIT(2) | BIT(1))
 102 #define USB_STA_SPEED_HS        BIT(2)
 103 #define USB_STA_SPEED_FS        BIT(1)
 104 #define USB_STA_SPEED_SS        0
 105 #define USB_STA_VBUS_STA        BIT(0)
 106
 107 /* DRD_CON */
 108 #define DRD_CON_PERI_CON        BIT(24)
 109 #define DRD_CON_VBOUT           BIT(0)
 110
 111 /* USB_INT_ENA_1 and USB_INT_STA_1 */
 112 #define USB_INT_1_B3_PLLWKUP    BIT(31)
 113 #define USB_INT_1_B3_LUPSUCS    BIT(30)
 114 #define USB_INT_1_B3_DISABLE    BIT(27)
 115 #define USB_INT_1_B3_WRMRST     BIT(21)
 116 #define USB_INT_1_B3_HOTRST     BIT(20)
 117 #define USB_INT_1_B2_USBRST     BIT(12)
 118 #define USB_INT_1_B2_L1SPND     BIT(11)
 119 #define USB_INT_1_B2_SPND       BIT(9)
 120 #define USB_INT_1_B2_RSUM       BIT(8)
 121 #define USB_INT_1_SPEED         BIT(1)
 122 #define USB_INT_1_VBUS_CNG      BIT(0)
 123
 124 /* USB_INT_ENA_2 and USB_INT_STA_2 */
 125 #define USB_INT_2_PIPE(n)       BIT(n)
 126
 127 /* P0_MOD */
 128 #define P0_MOD_DIR              BIT(6)
 129
 130 /* P0_CON and PN_CON */
 131 #define PX_CON_BYTE_EN_MASK             (BIT(10) | BIT(9))
 132 #define PX_CON_BYTE_EN_SHIFT            9
 133 #define PX_CON_BYTE_EN_BYTES(n)         (((n) << PX_CON_BYTE_EN_SHIFT) & \
 134                                          PX_CON_BYTE_EN_MASK)
 135 #define PX_CON_SEND                     BIT(8)
 136
 137 /* P0_CON */
 138 #define P0_CON_ST_RES_MASK              (BIT(27) | BIT(26))
 139 #define P0_CON_ST_RES_FORCE_STALL       BIT(27)
 140 #define P0_CON_ST_RES_NORMAL            BIT(26)
 141 #define P0_CON_ST_RES_FORCE_NRDY        0
 142 #define P0_CON_OT_RES_MASK              (BIT(25) | BIT(24))
 143 #define P0_CON_OT_RES_FORCE_STALL       BIT(25)
 144 #define P0_CON_OT_RES_NORMAL            BIT(24)
 145 #define P0_CON_OT_RES_FORCE_NRDY        0
 146 #define P0_CON_IN_RES_MASK              (BIT(17) | BIT(16))
 147 #define P0_CON_IN_RES_FORCE_STALL       BIT(17)
 148 #define P0_CON_IN_RES_NORMAL            BIT(16)
 149 #define P0_CON_IN_RES_FORCE_NRDY        0
 150 #define P0_CON_RES_WEN                  BIT(7)
 151 #define P0_CON_BCLR                     BIT(1)
 152
 153 /* P0_STA and PN_STA */
 154 #define PX_STA_BUFSTS           BIT(0)
 155
 156 /* P0_INT_ENA and P0_INT_STA */
 157 #define P0_INT_STSED            BIT(18)
 158 #define P0_INT_STSST            BIT(17)
 159 #define P0_INT_SETUP            BIT(16)
 160 #define P0_INT_RCVNL            BIT(8)
 161 #define P0_INT_ERDY             BIT(7)
 162 #define P0_INT_FLOW             BIT(6)
 163 #define P0_INT_STALL            BIT(2)
 164 #define P0_INT_NRDY             BIT(1)
 165 #define P0_INT_BFRDY            BIT(0)
 166 #define P0_INT_ALL_BITS         (P0_INT_STSED | P0_INT_SETUP | P0_INT_BFRDY)
 167
 168 /* PN_MOD */
 169 #define PN_MOD_DIR              BIT(6)
 170 #define PN_MOD_TYPE_SHIFT       4
 171 #define PN_MOD_TYPE_MASK        GENMASK(5, PN_MOD_TYPE_SHIFT)
 172 #define PN_MOD_TYPE(n)          (((n) << PN_MOD_TYPE_SHIFT) & \
 173                                  PN_MOD_TYPE_MASK)
 174 #define PN_MOD_EPNUM_MASK       GENMASK(3, 0)
 175 #define PN_MOD_EPNUM(n)         ((n) & PN_MOD_EPNUM_MASK)
 176
 177 /* PN_RAMMAP */
 178 #define PN_RAMMAP_RAMAREA_SHIFT 29
 179 #define PN_RAMMAP_RAMAREA_MASK  GENMASK(31, PN_RAMMAP_RAMAREA_SHIFT)
 180 #define PN_RAMMAP_RAMAREA_16KB  BIT(31)
 181 #define PN_RAMMAP_RAMAREA_8KB   (BIT(30) | BIT(29))
 182 #define PN_RAMMAP_RAMAREA_4KB   BIT(30)
 183 #define PN_RAMMAP_RAMAREA_2KB   BIT(29)
 184 #define PN_RAMMAP_RAMAREA_1KB   0
 185 #define PN_RAMMAP_MPKT_SHIFT    16
 186 #define PN_RAMMAP_MPKT_MASK     GENMASK(26, PN_RAMMAP_MPKT_SHIFT)
 187 #define PN_RAMMAP_MPKT(n)       (((n) << PN_RAMMAP_MPKT_SHIFT) & \
 188                                  PN_RAMMAP_MPKT_MASK)
 189 #define PN_RAMMAP_RAMIF_SHIFT   14
 190 #define PN_RAMMAP_RAMIF_MASK    GENMASK(15, PN_RAMMAP_RAMIF_SHIFT)
 191 #define PN_RAMMAP_RAMIF(n)      (((n) << PN_RAMMAP_RAMIF_SHIFT) & \
 192                                  PN_RAMMAP_RAMIF_MASK)
 193 #define PN_RAMMAP_BASEAD_MASK   GENMASK(13, 0)
 194 #define PN_RAMMAP_BASEAD(offs)  (((offs) >> 3) & PN_RAMMAP_BASEAD_MASK)
 195 #define PN_RAMMAP_DATA(area, ramif, basead)     ((PN_RAMMAP_##area) | \
 196                                                  (PN_RAMMAP_RAMIF(ramif)) | \
 197                                                  (PN_RAMMAP_BASEAD(basead)))
 198
 199 /* PN_CON */
 200 #define PN_CON_EN               BIT(31)
 201 #define PN_CON_DATAIF_EN        BIT(30)
 202 #define PN_CON_RES_MASK         (BIT(17) | BIT(16))
 203 #define PN_CON_RES_FORCE_STALL  BIT(17)
 204 #define PN_CON_RES_NORMAL       BIT(16)
 205 #define PN_CON_RES_FORCE_NRDY   0
 206 #define PN_CON_LAST             BIT(11)
 207 #define PN_CON_RES_WEN          BIT(7)
 208 #define PN_CON_CLR              BIT(0)
 209
 210 /* PN_INT_STA and PN_INT_ENA */
 211 #define PN_INT_LSTTR    BIT(4)
 212 #define PN_INT_BFRDY    BIT(0)
 213
 214 /* USB3_SSIFCMD */
 215 #define SSIFCMD_URES_U2         BIT(9)
 216 #define SSIFCMD_URES_U1         BIT(8)
 217 #define SSIFCMD_UDIR_U2         BIT(7)
 218 #define SSIFCMD_UDIR_U1         BIT(6)
 219 #define SSIFCMD_UREQ_U2         BIT(5)
 220 #define SSIFCMD_UREQ_U1         BIT(4)
 221
 222 #define USB3_EP0_SS_MAX_PACKET_SIZE     512
 223 #define USB3_EP0_HSFS_MAX_PACKET_SIZE   64
 224 #define USB3_EP0_BUF_SIZE               8
 225 #define USB3_MAX_NUM_PIPES              30
 226 #define USB3_WAIT_US                    3
 227
 228 struct renesas_usb3;
 229 struct renesas_usb3_request {
 230         struct usb_request      req;
 231         struct list_head        queue;
 232 };
 233
 234 #define USB3_EP_NAME_SIZE       8
 235 struct renesas_usb3_ep {
 236         struct usb_ep ep;
 237         struct renesas_usb3 *usb3;
 238         int num;
 239         char ep_name[USB3_EP_NAME_SIZE];
 240         struct list_head queue;
 241         u32 rammap_val;
 242         bool dir_in;
 243         bool halt;
 244         bool wedge;
 245         bool started;
 246 };
 247
 248 struct renesas_usb3_priv {
 249         int ramsize_per_ramif;          /* unit = bytes */
 250         int num_ramif;
 251         int ramsize_per_pipe;           /* unit = bytes */
 252         bool workaround_for_vbus;       /* if true, don't check vbus signal */
 253 };
 254
 255 struct renesas_usb3 {
 256         void __iomem *reg;
 257
 258         struct usb_gadget gadget;
 259         struct usb_gadget_driver *driver;
 260
 261         struct renesas_usb3_ep *usb3_ep;
 262         int num_usb3_eps;
 263
 264         spinlock_t lock;
 265         int disabled_count;
 266
 267         struct usb_request *ep0_req;
 268         u16 test_mode;
 269         u8 ep0_buf[USB3_EP0_BUF_SIZE];
 270         bool softconnect;
 271         bool workaround_for_vbus;
 272 };
 273
 274 #define gadget_to_renesas_usb3(_gadget) \
 275                 container_of(_gadget, struct renesas_usb3, gadget)
 276 #define renesas_usb3_to_gadget(renesas_usb3) (&renesas_usb3->gadget)
 277 #define usb3_to_dev(_usb3)      (_usb3->gadget.dev.parent)
 278
 279 #define usb_ep_to_usb3_ep(_ep) container_of(_ep, struct renesas_usb3_ep, ep)
 280 #define usb3_ep_to_usb3(_usb3_ep) (_usb3_ep->usb3)
 281 #define usb_req_to_usb3_req(_req) container_of(_req, \
 282                                             struct renesas_usb3_request, req)
 283
 284 #define usb3_get_ep(usb3, n) ((usb3)->usb3_ep + (n))
 285 #define usb3_for_each_ep(usb3_ep, usb3, i)                      \
 286                 for ((i) = 0, usb3_ep = usb3_get_ep(usb3, (i)); \
 287                      (i) < (usb3)->num_usb3_eps;                \
 288                      (i)++, usb3_ep = usb3_get_ep(usb3, (i)))
 289
 290 static const char udc_name[] = "renesas_usb3";
 291
 292 static void usb3_write(struct renesas_usb3 *usb3, u32 data, u32 offs)
 293 {
 294         iowrite32(data, usb3->reg + offs);
 295 }
 296
 297 static u32 usb3_read(struct renesas_usb3 *usb3, u32 offs)
 298 {
 299         return ioread32(usb3->reg + offs);
 300 }
 301
 302 static void usb3_set_bit(struct renesas_usb3 *usb3, u32 bits, u32 offs)
 303 {
 304         u32 val = usb3_read(usb3, offs);
 305
 306         val |= bits;
 307         usb3_write(usb3, val, offs);
 308 }
 309
 310 static void usb3_clear_bit(struct renesas_usb3 *usb3, u32 bits, u32 offs)
 311 {
 312         u32 val = usb3_read(usb3, offs);
 313
 314         val &= ~bits;
 315         usb3_write(usb3, val, offs);
 316 }
 317
 318 static int usb3_wait(struct renesas_usb3 *usb3, u32 reg, u32 mask,
 319                      u32 expected)
 320 {
 321         int i;
 322
 323         for (i = 0; i < USB3_WAIT_US; i++) {
 324                 if ((usb3_read(usb3, reg) & mask) == expected)
 325                         return 0;
 326                 udelay(1);
 327         }
 328
 329         dev_dbg(usb3_to_dev(usb3), "%s: timed out (%8x, %08x, %08x)\n",
 330                 __func__, reg, mask, expected);
 331
 332         return -EBUSY;
 333 }
 334
 335 static void usb3_enable_irq_1(struct renesas_usb3 *usb3, u32 bits)
 336 {
 337         usb3_set_bit(usb3, bits, USB3_USB_INT_ENA_1);
 338 }
 339
 340 static void usb3_disable_irq_1(struct renesas_usb3 *usb3, u32 bits)
 341 {
 342         usb3_clear_bit(usb3, bits, USB3_USB_INT_ENA_1);
 343 }
 344
 345 static void usb3_enable_pipe_irq(struct renesas_usb3 *usb3, int num)
 346 {
 347         usb3_set_bit(usb3, USB_INT_2_PIPE(num), USB3_USB_INT_ENA_2);
 348 }
 349
 350 static void usb3_disable_pipe_irq(struct renesas_usb3 *usb3, int num)
 351 {
 352         usb3_clear_bit(usb3, USB_INT_2_PIPE(num), USB3_USB_INT_ENA_2);
 353 }
 354
 355 static void usb3_init_axi_bridge(struct renesas_usb3 *usb3)
 356 {
 357         /* Set AXI_INT */
 358         usb3_write(usb3, ~0, USB3_DMA_INT_STA);
 359         usb3_write(usb3, 0, USB3_DMA_INT_ENA);
 360         usb3_set_bit(usb3, AXI_INT_DMAINT | AXI_INT_EPCINT, USB3_AXI_INT_ENA);
 361 }
 362
 363 static void usb3_init_epc_registers(struct renesas_usb3 *usb3)
 364 {
 365         /* FIXME: How to change host / peripheral mode as well? */
 366         usb3_set_bit(usb3, DRD_CON_PERI_CON, USB3_DRD_CON);
 367         usb3_clear_bit(usb3, DRD_CON_VBOUT, USB3_DRD_CON);
 368
 369         usb3_write(usb3, ~0, USB3_USB_INT_STA_1);
 370         usb3_enable_irq_1(usb3, USB_INT_1_VBUS_CNG);
 371 }
 372
 373 static bool usb3_wakeup_usb2_phy(struct renesas_usb3 *usb3)
 374 {
 375         if (!(usb3_read(usb3, USB3_USB20_CON) & USB20_CON_B2_SUSPEND))
 376                 return true;    /* already waked it up */
 377
 378         usb3_clear_bit(usb3, USB20_CON_B2_SUSPEND, USB3_USB20_CON);
 379         usb3_enable_irq_1(usb3, USB_INT_1_B2_RSUM);
 380
 381         return false;
 382 }
 383
 384 static void usb3_usb2_pullup(struct renesas_usb3 *usb3, int pullup)
 385 {
 386         u32 bits = USB20_CON_B2_PUE | USB20_CON_B2_CONNECT;
 387
 388         if (usb3->softconnect && pullup)
 389                 usb3_set_bit(usb3, bits, USB3_USB20_CON);
 390         else
 391                 usb3_clear_bit(usb3, bits, USB3_USB20_CON);
 392 }
 393
 394 static void usb3_set_test_mode(struct renesas_usb3 *usb3)
 395 {
 396         u32 val = usb3_read(usb3, USB3_USB20_CON);
 397
 398         val &= ~USB20_CON_B2_TSTMOD_MASK;
 399         val |= USB20_CON_B2_TSTMOD(usb3->test_mode);
 400         usb3_write(usb3, val | USB20_CON_B2_TSTMOD_EN, USB3_USB20_CON);
 401         if (!usb3->test_mode)
 402                 usb3_clear_bit(usb3, USB20_CON_B2_TSTMOD_EN, USB3_USB20_CON);
 403 }
 404
 405 static void usb3_start_usb2_connection(struct renesas_usb3 *usb3)
 406 {
 407         usb3->disabled_count++;
 408         usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
 409         usb3_set_bit(usb3, USB_COM_CON_SPD_MODE, USB3_USB_COM_CON);
 410         usb3_usb2_pullup(usb3, 1);
 411 }
 412
 413 static int usb3_is_usb3_phy_in_u3(struct renesas_usb3 *usb3)
 414 {
 415         return usb3_read(usb3, USB3_USB30_CON) & USB30_CON_POW_SEL_IN_U3;
 416 }
 417
 418 static bool usb3_wakeup_usb3_phy(struct renesas_usb3 *usb3)
 419 {
 420         if (!usb3_is_usb3_phy_in_u3(usb3))
 421                 return true;    /* already waked it up */
 422
 423         usb3_set_bit(usb3, USB30_CON_B3_PLLWAKE, USB3_USB30_CON);
 424         usb3_enable_irq_1(usb3, USB_INT_1_B3_PLLWKUP);
 425
 426         return false;
 427 }
 428
 429 static u16 usb3_feature_get_un_enabled(struct renesas_usb3 *usb3)
 430 {
 431         u32 mask_u2 = SSIFCMD_UDIR_U2 | SSIFCMD_UREQ_U2;
 432         u32 mask_u1 = SSIFCMD_UDIR_U1 | SSIFCMD_UREQ_U1;
 433         u32 val = usb3_read(usb3, USB3_SSIFCMD);
 434         u16 ret = 0;
 435
 436         /* Enables {U2,U1} if the bits of UDIR and UREQ are set to 0 */
 437         if (!(val & mask_u2))
 438                 ret |= 1 << USB_DEV_STAT_U2_ENABLED;
 439         if (!(val & mask_u1))
 440                 ret |= 1 << USB_DEV_STAT_U1_ENABLED;
 441
 442         return ret;
 443 }
 444
 445 static void usb3_feature_u2_enable(struct renesas_usb3 *usb3, bool enable)
 446 {
 447         u32 bits = SSIFCMD_UDIR_U2 | SSIFCMD_UREQ_U2;
 448
 449         /* Enables U2 if the bits of UDIR and UREQ are set to 0 */
 450         if (enable)
 451                 usb3_clear_bit(usb3, bits, USB3_SSIFCMD);
 452         else
 453                 usb3_set_bit(usb3, bits, USB3_SSIFCMD);
 454 }
 455
 456 static void usb3_feature_u1_enable(struct renesas_usb3 *usb3, bool enable)
 457 {
 458         u32 bits = SSIFCMD_UDIR_U1 | SSIFCMD_UREQ_U1;
 459
 460         /* Enables U1 if the bits of UDIR and UREQ are set to 0 */
 461         if (enable)
 462                 usb3_clear_bit(usb3, bits, USB3_SSIFCMD);
 463         else
 464                 usb3_set_bit(usb3, bits, USB3_SSIFCMD);
 465 }
 466
 467 static void usb3_start_operation_for_usb3(struct renesas_usb3 *usb3)
 468 {
 469         usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
 470         usb3_clear_bit(usb3, USB_COM_CON_SPD_MODE, USB3_USB_COM_CON);
 471         usb3_set_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON);
 472 }
 473
 474 static void usb3_start_usb3_connection(struct renesas_usb3 *usb3)
 475 {
 476         usb3_start_operation_for_usb3(usb3);
 477         usb3_set_bit(usb3, USB_COM_CON_RX_DETECTION, USB3_USB_COM_CON);
 478
 479         usb3_enable_irq_1(usb3, USB_INT_1_B3_LUPSUCS | USB_INT_1_B3_DISABLE |
 480                           USB_INT_1_SPEED);
 481 }
 482
 483 static void usb3_stop_usb3_connection(struct renesas_usb3 *usb3)
 484 {
 485         usb3_clear_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON);
 486 }
 487
 488 static void usb3_transition_to_default_state(struct renesas_usb3 *usb3,
 489                                              bool is_usb3)
 490 {
 491         usb3_set_bit(usb3, USB_INT_2_PIPE(0), USB3_USB_INT_ENA_2);
 492         usb3_write(usb3, P0_INT_ALL_BITS, USB3_P0_INT_STA);
 493         usb3_set_bit(usb3, P0_INT_ALL_BITS, USB3_P0_INT_ENA);
 494
 495         if (is_usb3)
 496                 usb3_enable_irq_1(usb3, USB_INT_1_B3_WRMRST |
 497                                   USB_INT_1_B3_HOTRST);
 498         else
 499                 usb3_enable_irq_1(usb3, USB_INT_1_B2_SPND |
 500                                   USB_INT_1_B2_L1SPND | USB_INT_1_B2_USBRST);
 501 }
 502
 503 static void usb3_connect(struct renesas_usb3 *usb3)
 504 {
 505         if (usb3_wakeup_usb3_phy(usb3))
 506                 usb3_start_usb3_connection(usb3);
 507 }
 508
 509 static void usb3_reset_epc(struct renesas_usb3 *usb3)
 510 {
 511         usb3_clear_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON);
 512         usb3_clear_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
 513         usb3_set_bit(usb3, USB_COM_CON_PIPE_CLR, USB3_USB_COM_CON);
 514         usb3->test_mode = 0;
 515         usb3_set_test_mode(usb3);
 516 }
 517
 518 static void usb3_disconnect(struct renesas_usb3 *usb3)
 519 {
 520         usb3->disabled_count = 0;
 521         usb3_usb2_pullup(usb3, 0);
 522         usb3_clear_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON);
 523         usb3_reset_epc(usb3);
 524
 525         if (usb3->driver)
 526                 usb3->driver->disconnect(&usb3->gadget);
 527 }
 528
 529 static void usb3_check_vbus(struct renesas_usb3 *usb3)
 530 {
 531         if (usb3->workaround_for_vbus) {
 532                 usb3_connect(usb3);
 533         } else {
 534                 if (usb3_read(usb3, USB3_USB_STA) & USB_STA_VBUS_STA)
 535                         usb3_connect(usb3);
 536                 else
 537                         usb3_disconnect(usb3);
 538         }
 539 }
 540
 541 static void renesas_usb3_init_controller(struct renesas_usb3 *usb3)
 542 {
 543         usb3_init_axi_bridge(usb3);
 544         usb3_init_epc_registers(usb3);
 545
 546         usb3_check_vbus(usb3);
 547 }
 548
 549 static void renesas_usb3_stop_controller(struct renesas_usb3 *usb3)
 550 {
 551         usb3_disconnect(usb3);
 552         usb3_write(usb3, 0, USB3_P0_INT_ENA);
 553         usb3_write(usb3, 0, USB3_PN_INT_ENA);
 554         usb3_write(usb3, 0, USB3_USB_INT_ENA_1);
 555         usb3_write(usb3, 0, USB3_USB_INT_ENA_2);
 556         usb3_write(usb3, 0, USB3_AXI_INT_ENA);
 557 }
 558
 559 static void usb3_irq_epc_int_1_pll_wakeup(struct renesas_usb3 *usb3)
 560 {
 561         usb3_disable_irq_1(usb3, USB_INT_1_B3_PLLWKUP);
 562         usb3_clear_bit(usb3, USB30_CON_B3_PLLWAKE, USB3_USB30_CON);
 563         usb3_start_usb3_connection(usb3);
 564 }
 565
 566 static void usb3_irq_epc_int_1_linkup_success(struct renesas_usb3 *usb3)
 567 {
 568         usb3_transition_to_default_state(usb3, true);
 569 }
 570
 571 static void usb3_irq_epc_int_1_resume(struct renesas_usb3 *usb3)
 572 {
 573         usb3_disable_irq_1(usb3, USB_INT_1_B2_RSUM);
 574         usb3_start_usb2_connection(usb3);
 575         usb3_transition_to_default_state(usb3, false);
 576 }
 577
 578 static void usb3_irq_epc_int_1_disable(struct renesas_usb3 *usb3)
 579 {
 580         usb3_stop_usb3_connection(usb3);
 581         if (usb3_wakeup_usb2_phy(usb3))
 582                 usb3_irq_epc_int_1_resume(usb3);
 583 }
 584
 585 static void usb3_irq_epc_int_1_bus_reset(struct renesas_usb3 *usb3)
 586 {
 587         usb3_reset_epc(usb3);
 588         if (usb3->disabled_count < 3)
 589                 usb3_start_usb3_connection(usb3);
 590         else
 591                 usb3_start_usb2_connection(usb3);
 592 }
 593
 594 static void usb3_irq_epc_int_1_vbus_change(struct renesas_usb3 *usb3)
 595 {
 596         usb3_check_vbus(usb3);
 597 }
 598
 599 static void usb3_irq_epc_int_1_hot_reset(struct renesas_usb3 *usb3)
 600 {
 601         usb3_reset_epc(usb3);
 602         usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
 603
 604         /* This bit shall be set within 12ms from the start of HotReset */
 605         usb3_set_bit(usb3, USB30_CON_B3_HOTRST_CMP, USB3_USB30_CON);
 606 }
 607
 608 static void usb3_irq_epc_int_1_warm_reset(struct renesas_usb3 *usb3)
 609 {
 610         usb3_reset_epc(usb3);
 611         usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
 612
 613         usb3_start_operation_for_usb3(usb3);
 614         usb3_enable_irq_1(usb3, USB_INT_1_SPEED);
 615 }
 616
 617 static void usb3_irq_epc_int_1_speed(struct renesas_usb3 *usb3)
 618 {
 619         u32 speed = usb3_read(usb3, USB3_USB_STA) & USB_STA_SPEED_MASK;
 620
 621         switch (speed) {
 622         case USB_STA_SPEED_SS:
 623                 usb3->gadget.speed = USB_SPEED_SUPER;
 624                 break;
 625         case USB_STA_SPEED_HS:
 626                 usb3->gadget.speed = USB_SPEED_HIGH;
 627                 break;
 628         case USB_STA_SPEED_FS:
 629                 usb3->gadget.speed = USB_SPEED_FULL;
 630                 break;
 631         default:
 632                 usb3->gadget.speed = USB_SPEED_UNKNOWN;
 633                 break;
 634         }
 635 }
 636
 637 static void usb3_irq_epc_int_1(struct renesas_usb3 *usb3, u32 int_sta_1)
 638 {
 639         if (int_sta_1 & USB_INT_1_B3_PLLWKUP)
 640                 usb3_irq_epc_int_1_pll_wakeup(usb3);
 641
 642         if (int_sta_1 & USB_INT_1_B3_LUPSUCS)
 643                 usb3_irq_epc_int_1_linkup_success(usb3);
 644
 645         if (int_sta_1 & USB_INT_1_B3_HOTRST)
 646                 usb3_irq_epc_int_1_hot_reset(usb3);
 647
 648         if (int_sta_1 & USB_INT_1_B3_WRMRST)
 649                 usb3_irq_epc_int_1_warm_reset(usb3);
 650
 651         if (int_sta_1 & USB_INT_1_B3_DISABLE)
 652                 usb3_irq_epc_int_1_disable(usb3);
 653
 654         if (int_sta_1 & USB_INT_1_B2_USBRST)
 655                 usb3_irq_epc_int_1_bus_reset(usb3);
 656
 657         if (int_sta_1 & USB_INT_1_B2_RSUM)
 658                 usb3_irq_epc_int_1_resume(usb3);
 659
 660         if (int_sta_1 & USB_INT_1_SPEED)
 661                 usb3_irq_epc_int_1_speed(usb3);
 662
 663         if (int_sta_1 & USB_INT_1_VBUS_CNG)
 664                 usb3_irq_epc_int_1_vbus_change(usb3);
 665 }
 666
 667 static struct renesas_usb3_request *__usb3_get_request(struct renesas_usb3_ep
 668                                                        *usb3_ep)
 669 {
 670         return list_first_entry_or_null(&usb3_ep->queue,
 671                                         struct renesas_usb3_request, queue);
 672 }
 673
 674 static struct renesas_usb3_request *usb3_get_request(struct renesas_usb3_ep
 675                                                      *usb3_ep)
 676 {
 677         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
 678         struct renesas_usb3_request *usb3_req;
 679         unsigned long flags;
 680
 681         spin_lock_irqsave(&usb3->lock, flags);
 682         usb3_req = __usb3_get_request(usb3_ep);
 683         spin_unlock_irqrestore(&usb3->lock, flags);
 684
 685         return usb3_req;
 686 }
 687
 688 static void usb3_request_done(struct renesas_usb3_ep *usb3_ep,
 689                               struct renesas_usb3_request *usb3_req, int status)
 690 {
 691         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
 692         unsigned long flags;
 693
 694         dev_dbg(usb3_to_dev(usb3), "giveback: ep%2d, %u, %u, %d\n",
 695                 usb3_ep->num, usb3_req->req.length, usb3_req->req.actual,
 696                 status);
 697         usb3_req->req.status = status;
 698         spin_lock_irqsave(&usb3->lock, flags);
 699         usb3_ep->started = false;
 700         list_del_init(&usb3_req->queue);
 701         spin_unlock_irqrestore(&usb3->lock, flags);
 702         usb_gadget_giveback_request(&usb3_ep->ep, &usb3_req->req);
 703 }
 704
 705 static void usb3_irq_epc_pipe0_status_end(struct renesas_usb3 *usb3)
 706 {
 707         struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
 708         struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
 709
 710         if (usb3_req)
 711                 usb3_request_done(usb3_ep, usb3_req, 0);
 712         if (usb3->test_mode)
 713                 usb3_set_test_mode(usb3);
 714 }
 715
 716 static void usb3_get_setup_data(struct renesas_usb3 *usb3,
 717                                 struct usb_ctrlrequest *ctrl)
 718 {
 719         struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
 720         u32 *data = (u32 *)ctrl;
 721
 722         *data++ = usb3_read(usb3, USB3_STUP_DAT_0);
 723         *data = usb3_read(usb3, USB3_STUP_DAT_1);
 724
 725         /* update this driver's flag */
 726         usb3_ep->dir_in = !!(ctrl->bRequestType & USB_DIR_IN);
 727 }
 728
 729 static void usb3_set_p0_con_update_res(struct renesas_usb3 *usb3, u32 res)
 730 {
 731         u32 val = usb3_read(usb3, USB3_P0_CON);
 732
 733         val &= ~(P0_CON_ST_RES_MASK | P0_CON_OT_RES_MASK | P0_CON_IN_RES_MASK);
 734         val |= res | P0_CON_RES_WEN;
 735         usb3_write(usb3, val, USB3_P0_CON);
 736 }
 737
 738 static void usb3_set_p0_con_for_ctrl_read_data(struct renesas_usb3 *usb3)
 739 {
 740         usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY |
 741                                    P0_CON_OT_RES_FORCE_STALL |
 742                                    P0_CON_IN_RES_NORMAL);
 743 }
 744
 745 static void usb3_set_p0_con_for_ctrl_read_status(struct renesas_usb3 *usb3)
 746 {
 747         usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL |
 748                                    P0_CON_OT_RES_FORCE_STALL |
 749                                    P0_CON_IN_RES_NORMAL);
 750 }
 751
 752 static void usb3_set_p0_con_for_ctrl_write_data(struct renesas_usb3 *usb3)
 753 {
 754         usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY |
 755                                    P0_CON_OT_RES_NORMAL |
 756                                    P0_CON_IN_RES_FORCE_STALL);
 757 }
 758
 759 static void usb3_set_p0_con_for_ctrl_write_status(struct renesas_usb3 *usb3)
 760 {
 761         usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL |
 762                                    P0_CON_OT_RES_NORMAL |
 763                                    P0_CON_IN_RES_FORCE_STALL);
 764 }
 765
 766 static void usb3_set_p0_con_for_no_data(struct renesas_usb3 *usb3)
 767 {
 768         usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL |
 769                                    P0_CON_OT_RES_FORCE_STALL |
 770                                    P0_CON_IN_RES_FORCE_STALL);
 771 }
 772
 773 static void usb3_set_p0_con_stall(struct renesas_usb3 *usb3)
 774 {
 775         usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_STALL |
 776                                    P0_CON_OT_RES_FORCE_STALL |
 777                                    P0_CON_IN_RES_FORCE_STALL);
 778 }
 779
 780 static void usb3_set_p0_con_stop(struct renesas_usb3 *usb3)
 781 {
 782         usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY |
 783                                    P0_CON_OT_RES_FORCE_NRDY |
 784                                    P0_CON_IN_RES_FORCE_NRDY);
 785 }
 786
 787 static int usb3_pn_change(struct renesas_usb3 *usb3, int num)
 788 {
 789         if (num == 0 || num > usb3->num_usb3_eps)
 790                 return -ENXIO;
 791
 792         usb3_write(usb3, num, USB3_PIPE_COM);
 793
 794         return 0;
 795 }
 796
 797 static void usb3_set_pn_con_update_res(struct renesas_usb3 *usb3, u32 res)
 798 {
 799         u32 val = usb3_read(usb3, USB3_PN_CON);
 800
 801         val &= ~PN_CON_RES_MASK;
 802         val |= res & PN_CON_RES_MASK;
 803         val |= PN_CON_RES_WEN;
 804         usb3_write(usb3, val, USB3_PN_CON);
 805 }
 806
 807 static void usb3_pn_start(struct renesas_usb3 *usb3)
 808 {
 809         usb3_set_pn_con_update_res(usb3, PN_CON_RES_NORMAL);
 810 }
 811
 812 static void usb3_pn_stop(struct renesas_usb3 *usb3)
 813 {
 814         usb3_set_pn_con_update_res(usb3, PN_CON_RES_FORCE_NRDY);
 815 }
 816
 817 static void usb3_pn_stall(struct renesas_usb3 *usb3)
 818 {
 819         usb3_set_pn_con_update_res(usb3, PN_CON_RES_FORCE_STALL);
 820 }
 821
 822 static int usb3_pn_con_clear(struct renesas_usb3 *usb3)
 823 {
 824         usb3_set_bit(usb3, PN_CON_CLR, USB3_PN_CON);
 825
 826         return usb3_wait(usb3, USB3_PN_CON, PN_CON_CLR, 0);
 827 }
 828
 829 static bool usb3_is_transfer_complete(struct renesas_usb3_ep *usb3_ep,
 830                                       struct renesas_usb3_request *usb3_req)
 831 {
 832         struct usb_request *req = &usb3_req->req;
 833
 834         if ((!req->zero && req->actual == req->length) ||
 835             (req->actual % usb3_ep->ep.maxpacket) || (req->length == 0))
 836                 return true;
 837         else
 838                 return false;
 839 }
 840
 841 static int usb3_wait_pipe_status(struct renesas_usb3_ep *usb3_ep, u32 mask)
 842 {
 843         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
 844         u32 sta_reg = usb3_ep->num ? USB3_PN_STA : USB3_P0_STA;
 845
 846         return usb3_wait(usb3, sta_reg, mask, mask);
 847 }
 848
 849 static void usb3_set_px_con_send(struct renesas_usb3_ep *usb3_ep, int bytes,
 850                                  bool last)
 851 {
 852         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
 853         u32 con_reg = usb3_ep->num ? USB3_PN_CON : USB3_P0_CON;
 854         u32 val = usb3_read(usb3, con_reg);
 855
 856         val |= PX_CON_SEND | PX_CON_BYTE_EN_BYTES(bytes);
 857         val |= (usb3_ep->num && last) ? PN_CON_LAST : 0;
 858         usb3_write(usb3, val, con_reg);
 859 }
 860
 861 static int usb3_write_pipe(struct renesas_usb3_ep *usb3_ep,
 862                            struct renesas_usb3_request *usb3_req,
 863                            u32 fifo_reg)
 864 {
 865         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
 866         int i;
 867         int len = min_t(unsigned, usb3_req->req.length - usb3_req->req.actual,
 868                         usb3_ep->ep.maxpacket);
 869         u8 *buf = usb3_req->req.buf + usb3_req->req.actual;
 870         u32 tmp = 0;
 871         bool is_last;
 872
 873         if (usb3_wait_pipe_status(usb3_ep, PX_STA_BUFSTS) < 0)
 874                 return -EBUSY;
 875
 876         /* Update gadget driver parameter */
 877         usb3_req->req.actual += len;
 878
 879         /* Write data to the register */
 880         if (len >= 4) {
 881                 iowrite32_rep(usb3->reg + fifo_reg, buf, len / 4);
 882                 buf += (len / 4) * 4;
 883                 len %= 4;       /* update len to use usb3_set_pX_con_send() */
 884         }
 885
 886         if (len) {
 887                 for (i = 0; i < len; i++)
 888                         tmp |= buf[i] << (8 * i);
 889                 usb3_write(usb3, tmp, fifo_reg);
 890         }
 891
 892         is_last = usb3_is_transfer_complete(usb3_ep, usb3_req);
 893         /* Send the data */
 894         usb3_set_px_con_send(usb3_ep, len, is_last);
 895
 896         return is_last ? 0 : -EAGAIN;
 897 }
 898
 899 static u32 usb3_get_received_length(struct renesas_usb3_ep *usb3_ep)
 900 {
 901         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
 902         u32 lng_reg = usb3_ep->num ? USB3_PN_LNG : USB3_P0_LNG;
 903
 904         return usb3_read(usb3, lng_reg);
 905 }
 906
 907 static int usb3_read_pipe(struct renesas_usb3_ep *usb3_ep,
 908                           struct renesas_usb3_request *usb3_req, u32 fifo_reg)
 909 {
 910         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
 911         int i;
 912         int len = min_t(unsigned, usb3_req->req.length - usb3_req->req.actual,
 913                         usb3_get_received_length(usb3_ep));
 914         u8 *buf = usb3_req->req.buf + usb3_req->req.actual;
 915         u32 tmp = 0;
 916
 917         if (!len)
 918                 return 0;
 919
 920         /* Update gadget driver parameter */
 921         usb3_req->req.actual += len;
 922
 923         /* Read data from the register */
 924         if (len >= 4) {
 925                 ioread32_rep(usb3->reg + fifo_reg, buf, len / 4);
 926                 buf += (len / 4) * 4;
 927                 len %= 4;
 928         }
 929
 930         if (len) {
 931                 tmp = usb3_read(usb3, fifo_reg);
 932                 for (i = 0; i < len; i++)
 933                         buf[i] = (tmp >> (8 * i)) & 0xff;
 934         }
 935
 936         return usb3_is_transfer_complete(usb3_ep, usb3_req) ? 0 : -EAGAIN;
 937 }
 938
 939 static void usb3_set_status_stage(struct renesas_usb3_ep *usb3_ep,
 940                                   struct renesas_usb3_request *usb3_req)
 941 {
 942         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
 943
 944         if (usb3_ep->dir_in) {
 945                 usb3_set_p0_con_for_ctrl_read_status(usb3);
 946         } else {
 947                 if (!usb3_req->req.length)
 948                         usb3_set_p0_con_for_no_data(usb3);
 949                 else
 950                         usb3_set_p0_con_for_ctrl_write_status(usb3);
 951         }
 952 }
 953
 954 static void usb3_p0_xfer(struct renesas_usb3_ep *usb3_ep,
 955                          struct renesas_usb3_request *usb3_req)
 956 {
 957         int ret = -EAGAIN;
 958
 959         if (usb3_ep->dir_in)
 960                 ret = usb3_write_pipe(usb3_ep, usb3_req, USB3_P0_WRITE);
 961         else
 962                 ret = usb3_read_pipe(usb3_ep, usb3_req, USB3_P0_READ);
 963
 964         if (!ret)
 965                 usb3_set_status_stage(usb3_ep, usb3_req);
 966 }
 967
 968 static void usb3_start_pipe0(struct renesas_usb3_ep *usb3_ep,
 969                              struct renesas_usb3_request *usb3_req)
 970 {
 971         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
 972
 973         if (usb3_ep->started)
 974                 return;
 975
 976         usb3_ep->started = true;
 977
 978         if (usb3_ep->dir_in) {
 979                 usb3_set_bit(usb3, P0_MOD_DIR, USB3_P0_MOD);
 980                 usb3_set_p0_con_for_ctrl_read_data(usb3);
 981         } else {
 982                 usb3_clear_bit(usb3, P0_MOD_DIR, USB3_P0_MOD);
 983                 usb3_set_p0_con_for_ctrl_write_data(usb3);
 984         }
 985
 986         usb3_p0_xfer(usb3_ep, usb3_req);
 987 }
 988
 989 static void usb3_start_pipen(struct renesas_usb3_ep *usb3_ep,
 990                              struct renesas_usb3_request *usb3_req)
 991 {
 992         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
 993         struct renesas_usb3_request *usb3_req_first = usb3_get_request(usb3_ep);
 994         unsigned long flags;
 995         int ret = -EAGAIN;
 996         u32 enable_bits = 0;
 997
 998         if (usb3_ep->halt || usb3_ep->started)
 999                 return;
1000         if (usb3_req != usb3_req_first)
1001                 return;
1002
1003         spin_lock_irqsave(&usb3->lock, flags);
1004         if (usb3_pn_change(usb3, usb3_ep->num) < 0)
1005                 goto out;
1006
1007         usb3_ep->started = true;
1008         usb3_pn_start(usb3);
1009
1010         if (usb3_ep->dir_in) {
1011                 ret = usb3_write_pipe(usb3_ep, usb3_req, USB3_PN_WRITE);
1012                 enable_bits |= PN_INT_LSTTR;
1013         }
1014
1015         if (ret < 0)
1016                 enable_bits |= PN_INT_BFRDY;
1017
1018         if (enable_bits) {
1019                 usb3_set_bit(usb3, enable_bits, USB3_PN_INT_ENA);
1020                 usb3_enable_pipe_irq(usb3, usb3_ep->num);
1021         }
1022 out:
1023         spin_unlock_irqrestore(&usb3->lock, flags);
1024 }
1025
1026 static int renesas_usb3_ep_queue(struct usb_ep *_ep, struct usb_request *_req,
1027                                  gfp_t gfp_flags)
1028 {
1029         struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
1030         struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req);
1031         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1032         unsigned long flags;
1033
1034         dev_dbg(usb3_to_dev(usb3), "ep_queue: ep%2d, %u\n", usb3_ep->num,
1035                 _req->length);
1036
1037         _req->status = -EINPROGRESS;
1038         _req->actual = 0;
1039         spin_lock_irqsave(&usb3->lock, flags);
1040         list_add_tail(&usb3_req->queue, &usb3_ep->queue);
1041         spin_unlock_irqrestore(&usb3->lock, flags);
1042
1043         if (!usb3_ep->num)
1044                 usb3_start_pipe0(usb3_ep, usb3_req);
1045         else
1046                 usb3_start_pipen(usb3_ep, usb3_req);
1047
1048         return 0;
1049 }
1050
1051 static void usb3_set_device_address(struct renesas_usb3 *usb3, u16 addr)
1052 {
1053         /* DEV_ADDR bit field is cleared by WarmReset, HotReset and BusReset */
1054         usb3_set_bit(usb3, USB_COM_CON_DEV_ADDR(addr), USB3_USB_COM_CON);
1055 }
1056
1057 static bool usb3_std_req_set_address(struct renesas_usb3 *usb3,
1058                                      struct usb_ctrlrequest *ctrl)
1059 {
1060         if (ctrl->wValue >= 128)
1061                 return true;    /* stall */
1062
1063         usb3_set_device_address(usb3, ctrl->wValue);
1064         usb3_set_p0_con_for_no_data(usb3);
1065
1066         return false;
1067 }
1068
1069 static void usb3_pipe0_internal_xfer(struct renesas_usb3 *usb3,
1070                                      void *tx_data, size_t len,
1071                                      void (*complete)(struct usb_ep *ep,
1072                                                       struct usb_request *req))
1073 {
1074         struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
1075
1076         if (tx_data)
1077                 memcpy(usb3->ep0_buf, tx_data,
1078                        min_t(size_t, len, USB3_EP0_BUF_SIZE));
1079
1080         usb3->ep0_req->buf = &usb3->ep0_buf;
1081         usb3->ep0_req->length = len;
1082         usb3->ep0_req->complete = complete;
1083         renesas_usb3_ep_queue(&usb3_ep->ep, usb3->ep0_req, GFP_ATOMIC);
1084 }
1085
1086 static void usb3_pipe0_get_status_completion(struct usb_ep *ep,
1087                                              struct usb_request *req)
1088 {
1089 }
1090
1091 static bool usb3_std_req_get_status(struct renesas_usb3 *usb3,
1092                                     struct usb_ctrlrequest *ctrl)
1093 {
1094         bool stall = false;
1095         struct renesas_usb3_ep *usb3_ep;
1096         int num;
1097         u16 status = 0;
1098
1099         switch (ctrl->bRequestType & USB_RECIP_MASK) {
1100         case USB_RECIP_DEVICE:
1101                 if (usb3->gadget.is_selfpowered)
1102                         status |= 1 << USB_DEVICE_SELF_POWERED;
1103                 if (usb3->gadget.speed == USB_SPEED_SUPER)
1104                         status |= usb3_feature_get_un_enabled(usb3);
1105                 break;
1106         case USB_RECIP_INTERFACE:
1107                 break;
1108         case USB_RECIP_ENDPOINT:
1109                 num = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
1110                 usb3_ep = usb3_get_ep(usb3, num);
1111                 if (usb3_ep->halt)
1112                         status |= 1 << USB_ENDPOINT_HALT;
1113                 break;
1114         default:
1115                 stall = true;
1116                 break;
1117         }
1118
1119         if (!stall) {
1120                 status = cpu_to_le16(status);
1121                 dev_dbg(usb3_to_dev(usb3), "get_status: req = %p\n",
1122                         usb_req_to_usb3_req(usb3->ep0_req));
1123                 usb3_pipe0_internal_xfer(usb3, &status, sizeof(status),
1124                                          usb3_pipe0_get_status_completion);
1125         }
1126
1127         return stall;
1128 }
1129
1130 static bool usb3_std_req_feature_device(struct renesas_usb3 *usb3,
1131                                         struct usb_ctrlrequest *ctrl, bool set)
1132 {
1133         bool stall = true;
1134         u16 w_value = le16_to_cpu(ctrl->wValue);
1135
1136         switch (w_value) {
1137         case USB_DEVICE_TEST_MODE:
1138                 if (!set)
1139                         break;
1140                 usb3->test_mode = le16_to_cpu(ctrl->wIndex) >> 8;
1141                 stall = false;
1142                 break;
1143         case USB_DEVICE_U1_ENABLE:
1144         case USB_DEVICE_U2_ENABLE:
1145                 if (usb3->gadget.speed != USB_SPEED_SUPER)
1146                         break;
1147                 if (w_value == USB_DEVICE_U1_ENABLE)
1148                         usb3_feature_u1_enable(usb3, set);
1149                 if (w_value == USB_DEVICE_U2_ENABLE)
1150                         usb3_feature_u2_enable(usb3, set);
1151                 stall = false;
1152                 break;
1153         default:
1154                 break;
1155         }
1156
1157         return stall;
1158 }
1159
1160 static int usb3_set_halt_p0(struct renesas_usb3_ep *usb3_ep, bool halt)
1161 {
1162         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1163
1164         if (unlikely(usb3_ep->num))
1165                 return -EINVAL;
1166
1167         usb3_ep->halt = halt;
1168         if (halt)
1169                 usb3_set_p0_con_stall(usb3);
1170         else
1171                 usb3_set_p0_con_stop(usb3);
1172
1173         return 0;
1174 }
1175
1176 static int usb3_set_halt_pn(struct renesas_usb3_ep *usb3_ep, bool halt,
1177                             bool is_clear_feature)
1178 {
1179         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1180         unsigned long flags;
1181
1182         spin_lock_irqsave(&usb3->lock, flags);
1183         if (!usb3_pn_change(usb3, usb3_ep->num)) {
1184                 usb3_ep->halt = halt;
1185                 if (halt) {
1186                         usb3_pn_stall(usb3);
1187                 } else if (!is_clear_feature || !usb3_ep->wedge) {
1188                         usb3_pn_con_clear(usb3);
1189                         usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON);
1190                         usb3_pn_stop(usb3);
1191                 }
1192         }
1193         spin_unlock_irqrestore(&usb3->lock, flags);
1194
1195         return 0;
1196 }
1197
1198 static int usb3_set_halt(struct renesas_usb3_ep *usb3_ep, bool halt,
1199                          bool is_clear_feature)
1200 {
1201         int ret = 0;
1202
1203         if (halt && usb3_ep->started)
1204                 return -EAGAIN;
1205
1206         if (usb3_ep->num)
1207                 ret = usb3_set_halt_pn(usb3_ep, halt, is_clear_feature);
1208         else
1209                 ret = usb3_set_halt_p0(usb3_ep, halt);
1210
1211         return ret;
1212 }
1213
1214 static bool usb3_std_req_feature_endpoint(struct renesas_usb3 *usb3,
1215                                           struct usb_ctrlrequest *ctrl,
1216                                           bool set)
1217 {
1218         int num = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
1219         struct renesas_usb3_ep *usb3_ep;
1220         struct renesas_usb3_request *usb3_req;
1221
1222         if (le16_to_cpu(ctrl->wValue) != USB_ENDPOINT_HALT)
1223                 return true;    /* stall */
1224
1225         usb3_ep = usb3_get_ep(usb3, num);
1226         usb3_set_halt(usb3_ep, set, true);
1227
1228         /* Restarts a queue if clear feature */
1229         if (!set) {
1230                 usb3_ep->started = false;
1231                 usb3_req = usb3_get_request(usb3_ep);
1232                 if (usb3_req)
1233                         usb3_start_pipen(usb3_ep, usb3_req);
1234         }
1235
1236         return false;
1237 }
1238
1239 static bool usb3_std_req_feature(struct renesas_usb3 *usb3,
1240                                  struct usb_ctrlrequest *ctrl, bool set)
1241 {
1242         bool stall = false;
1243
1244         switch (ctrl->bRequestType & USB_RECIP_MASK) {
1245         case USB_RECIP_DEVICE:
1246                 stall = usb3_std_req_feature_device(usb3, ctrl, set);
1247                 break;
1248         case USB_RECIP_INTERFACE:
1249                 break;
1250         case USB_RECIP_ENDPOINT:
1251                 stall = usb3_std_req_feature_endpoint(usb3, ctrl, set);
1252                 break;
1253         default:
1254                 stall = true;
1255                 break;
1256         }
1257
1258         if (!stall)
1259                 usb3_set_p0_con_for_no_data(usb3);
1260
1261         return stall;
1262 }
1263
1264 static void usb3_pipe0_set_sel_completion(struct usb_ep *ep,
1265                                           struct usb_request *req)
1266 {
1267         /* TODO */
1268 }
1269
1270 static bool usb3_std_req_set_sel(struct renesas_usb3 *usb3,
1271                                  struct usb_ctrlrequest *ctrl)
1272 {
1273         u16 w_length = le16_to_cpu(ctrl->wLength);
1274
1275         if (w_length != 6)
1276                 return true;    /* stall */
1277
1278         dev_dbg(usb3_to_dev(usb3), "set_sel: req = %p\n",
1279                 usb_req_to_usb3_req(usb3->ep0_req));
1280         usb3_pipe0_internal_xfer(usb3, NULL, 6, usb3_pipe0_set_sel_completion);
1281
1282         return false;
1283 }
1284
1285 static bool usb3_std_req_set_configuration(struct renesas_usb3 *usb3,
1286                                            struct usb_ctrlrequest *ctrl)
1287 {
1288         if (ctrl->wValue > 0)
1289                 usb3_set_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON);
1290         else
1291                 usb3_clear_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON);
1292
1293         return false;
1294 }
1295
1296 /**
1297  * usb3_handle_standard_request - handle some standard requests
1298  * @usb3: the renesas_usb3 pointer
1299  * @ctrl: a pointer of setup data
1300  *
1301  * Returns true if this function handled a standard request
1302  */
1303 static bool usb3_handle_standard_request(struct renesas_usb3 *usb3,
1304                                          struct usb_ctrlrequest *ctrl)
1305 {
1306         bool ret = false;
1307         bool stall = false;
1308
1309         if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
1310                 switch (ctrl->bRequest) {
1311                 case USB_REQ_SET_ADDRESS:
1312                         stall = usb3_std_req_set_address(usb3, ctrl);
1313                         ret = true;
1314                         break;
1315                 case USB_REQ_GET_STATUS:
1316                         stall = usb3_std_req_get_status(usb3, ctrl);
1317                         ret = true;
1318                         break;
1319                 case USB_REQ_CLEAR_FEATURE:
1320                         stall = usb3_std_req_feature(usb3, ctrl, false);
1321                         ret = true;
1322                         break;
1323                 case USB_REQ_SET_FEATURE:
1324                         stall = usb3_std_req_feature(usb3, ctrl, true);
1325                         ret = true;
1326                         break;
1327                 case USB_REQ_SET_SEL:
1328                         stall = usb3_std_req_set_sel(usb3, ctrl);
1329                         ret = true;
1330                         break;
1331                 case USB_REQ_SET_ISOCH_DELAY:
1332                         /* This hardware doesn't support Isochronous xfer */
1333                         stall = true;
1334                         ret = true;
1335                         break;
1336                 case USB_REQ_SET_CONFIGURATION:
1337                         usb3_std_req_set_configuration(usb3, ctrl);
1338                         break;
1339                 default:
1340                         break;
1341                 }
1342         }
1343
1344         if (stall)
1345                 usb3_set_p0_con_stall(usb3);
1346
1347         return ret;
1348 }
1349
1350 static int usb3_p0_con_clear_buffer(struct renesas_usb3 *usb3)
1351 {
1352         usb3_set_bit(usb3, P0_CON_BCLR, USB3_P0_CON);
1353
1354         return usb3_wait(usb3, USB3_P0_CON, P0_CON_BCLR, 0);
1355 }
1356
1357 static void usb3_irq_epc_pipe0_setup(struct renesas_usb3 *usb3)
1358 {
1359         struct usb_ctrlrequest ctrl;
1360         struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
1361
1362         /* Call giveback function if previous transfer is not completed */
1363         if (usb3_ep->started)
1364                 usb3_request_done(usb3_ep, usb3_get_request(usb3_ep),
1365                                   -ECONNRESET);
1366
1367         usb3_p0_con_clear_buffer(usb3);
1368         usb3_get_setup_data(usb3, &ctrl);
1369         if (!usb3_handle_standard_request(usb3, &ctrl))
1370                 if (usb3->driver->setup(&usb3->gadget, &ctrl) < 0)
1371                         usb3_set_p0_con_stall(usb3);
1372 }
1373
1374 static void usb3_irq_epc_pipe0_bfrdy(struct renesas_usb3 *usb3)
1375 {
1376         struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
1377         struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
1378
1379         if (!usb3_req)
1380                 return;
1381
1382         usb3_p0_xfer(usb3_ep, usb3_req);
1383 }
1384
1385 static void usb3_irq_epc_pipe0(struct renesas_usb3 *usb3)
1386 {
1387         u32 p0_int_sta = usb3_read(usb3, USB3_P0_INT_STA);
1388
1389         p0_int_sta &= usb3_read(usb3, USB3_P0_INT_ENA);
1390         usb3_write(usb3, p0_int_sta, USB3_P0_INT_STA);
1391         if (p0_int_sta & P0_INT_STSED)
1392                 usb3_irq_epc_pipe0_status_end(usb3);
1393         if (p0_int_sta & P0_INT_SETUP)
1394                 usb3_irq_epc_pipe0_setup(usb3);
1395         if (p0_int_sta & P0_INT_BFRDY)
1396                 usb3_irq_epc_pipe0_bfrdy(usb3);
1397 }
1398
1399 static void usb3_request_done_pipen(struct renesas_usb3 *usb3,
1400                                     struct renesas_usb3_ep *usb3_ep,
1401                                     struct renesas_usb3_request *usb3_req,
1402                                     int status)
1403 {
1404         usb3_pn_stop(usb3);
1405         usb3_disable_pipe_irq(usb3, usb3_ep->num);
1406         usb3_request_done(usb3_ep, usb3_req, status);
1407
1408         /* get next usb3_req */
1409         usb3_req = usb3_get_request(usb3_ep);
1410         if (usb3_req)
1411                 usb3_start_pipen(usb3_ep, usb3_req);
1412 }
1413
1414 static void usb3_irq_epc_pipen_lsttr(struct renesas_usb3 *usb3, int num)
1415 {
1416         struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, num);
1417         struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
1418
1419         if (!usb3_req)
1420                 return;
1421
1422         if (usb3_ep->dir_in) {
1423                 dev_dbg(usb3_to_dev(usb3), "%s: len = %u, actual = %u\n",
1424                         __func__, usb3_req->req.length, usb3_req->req.actual);
1425                 usb3_request_done_pipen(usb3, usb3_ep, usb3_req, 0);
1426         }
1427 }
1428
1429 static void usb3_irq_epc_pipen_bfrdy(struct renesas_usb3 *usb3, int num)
1430 {
1431         struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, num);
1432         struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
1433
1434         if (!usb3_req)
1435                 return;
1436
1437         if (usb3_ep->dir_in) {
1438                 /* Do not stop the IN pipe here to detect LSTTR interrupt */
1439                 if (!usb3_write_pipe(usb3_ep, usb3_req, USB3_PN_WRITE))
1440                         usb3_clear_bit(usb3, PN_INT_BFRDY, USB3_PN_INT_ENA);
1441         } else {
1442                 if (!usb3_read_pipe(usb3_ep, usb3_req, USB3_PN_READ))
1443                         usb3_request_done_pipen(usb3, usb3_ep, usb3_req, 0);
1444         }
1445 }
1446
1447 static void usb3_irq_epc_pipen(struct renesas_usb3 *usb3, int num)
1448 {
1449         u32 pn_int_sta;
1450
1451         if (usb3_pn_change(usb3, num) < 0)
1452                 return;
1453
1454         pn_int_sta = usb3_read(usb3, USB3_PN_INT_STA);
1455         pn_int_sta &= usb3_read(usb3, USB3_PN_INT_ENA);
1456         usb3_write(usb3, pn_int_sta, USB3_PN_INT_STA);
1457         if (pn_int_sta & PN_INT_LSTTR)
1458                 usb3_irq_epc_pipen_lsttr(usb3, num);
1459         if (pn_int_sta & PN_INT_BFRDY)
1460                 usb3_irq_epc_pipen_bfrdy(usb3, num);
1461 }
1462
1463 static void usb3_irq_epc_int_2(struct renesas_usb3 *usb3, u32 int_sta_2)
1464 {
1465         int i;
1466
1467         for (i = 0; i < usb3->num_usb3_eps; i++) {
1468                 if (int_sta_2 & USB_INT_2_PIPE(i)) {
1469                         if (!i)
1470                                 usb3_irq_epc_pipe0(usb3);
1471                         else
1472                                 usb3_irq_epc_pipen(usb3, i);
1473                 }
1474         }
1475 }
1476
1477 static void usb3_irq_epc(struct renesas_usb3 *usb3)
1478 {
1479         u32 int_sta_1 = usb3_read(usb3, USB3_USB_INT_STA_1);
1480         u32 int_sta_2 = usb3_read(usb3, USB3_USB_INT_STA_2);
1481
1482         int_sta_1 &= usb3_read(usb3, USB3_USB_INT_ENA_1);
1483         if (int_sta_1) {
1484                 usb3_write(usb3, int_sta_1, USB3_USB_INT_STA_1);
1485                 usb3_irq_epc_int_1(usb3, int_sta_1);
1486         }
1487
1488         int_sta_2 &= usb3_read(usb3, USB3_USB_INT_ENA_2);
1489         if (int_sta_2)
1490                 usb3_irq_epc_int_2(usb3, int_sta_2);
1491 }
1492
1493 static irqreturn_t renesas_usb3_irq(int irq, void *_usb3)
1494 {
1495         struct renesas_usb3 *usb3 = _usb3;
1496         irqreturn_t ret = IRQ_NONE;
1497         u32 axi_int_sta = usb3_read(usb3, USB3_AXI_INT_STA);
1498
1499         if (axi_int_sta & AXI_INT_EPCINT) {
1500                 usb3_irq_epc(usb3);
1501                 ret = IRQ_HANDLED;
1502         }
1503
1504         return ret;
1505 }
1506
1507 static void usb3_write_pn_mod(struct renesas_usb3_ep *usb3_ep,
1508                               const struct usb_endpoint_descriptor *desc)
1509 {
1510         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1511         u32 val = 0;
1512
1513         val |= usb3_ep->dir_in ? PN_MOD_DIR : 0;
1514         val |= PN_MOD_TYPE(usb_endpoint_type(desc));
1515         val |= PN_MOD_EPNUM(usb_endpoint_num(desc));
1516         usb3_write(usb3, val, USB3_PN_MOD);
1517 }
1518
1519 static u32 usb3_calc_ramarea(int ram_size)
1520 {
1521         WARN_ON(ram_size > SZ_16K);
1522
1523         if (ram_size <= SZ_1K)
1524                 return PN_RAMMAP_RAMAREA_1KB;
1525         else if (ram_size <= SZ_2K)
1526                 return PN_RAMMAP_RAMAREA_2KB;
1527         else if (ram_size <= SZ_4K)
1528                 return PN_RAMMAP_RAMAREA_4KB;
1529         else if (ram_size <= SZ_8K)
1530                 return PN_RAMMAP_RAMAREA_8KB;
1531         else
1532                 return PN_RAMMAP_RAMAREA_16KB;
1533 }
1534
1535 static u32 usb3_calc_rammap_val(struct renesas_usb3_ep *usb3_ep,
1536                                 const struct usb_endpoint_descriptor *desc)
1537 {
1538         return usb3_ep->rammap_val | PN_RAMMAP_MPKT(usb_endpoint_maxp(desc));
1539 }
1540
1541 static int usb3_enable_pipe_n(struct renesas_usb3_ep *usb3_ep,
1542                               const struct usb_endpoint_descriptor *desc)
1543 {
1544         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1545         unsigned long flags;
1546
1547         usb3_ep->dir_in = usb_endpoint_dir_in(desc);
1548
1549         spin_lock_irqsave(&usb3->lock, flags);
1550         if (!usb3_pn_change(usb3, usb3_ep->num)) {
1551                 usb3_write_pn_mod(usb3_ep, desc);
1552                 usb3_write(usb3, usb3_calc_rammap_val(usb3_ep, desc),
1553                            USB3_PN_RAMMAP);
1554                 usb3_pn_con_clear(usb3);
1555                 usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON);
1556         }
1557         spin_unlock_irqrestore(&usb3->lock, flags);
1558
1559         return 0;
1560 }
1561
1562 static int usb3_disable_pipe_n(struct renesas_usb3_ep *usb3_ep)
1563 {
1564         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1565         unsigned long flags;
1566
1567         usb3_ep->halt = false;
1568
1569         spin_lock_irqsave(&usb3->lock, flags);
1570         if (!usb3_pn_change(usb3, usb3_ep->num)) {
1571                 usb3_write(usb3, 0, USB3_PN_RAMMAP);
1572                 usb3_clear_bit(usb3, PN_CON_EN, USB3_PN_CON);
1573         }
1574         spin_unlock_irqrestore(&usb3->lock, flags);
1575
1576         return 0;
1577 }
1578
1579 /*------- usb_ep_ops -----------------------------------------------------*/
1580 static int renesas_usb3_ep_enable(struct usb_ep *_ep,
1581                                   const struct usb_endpoint_descriptor *desc)
1582 {
1583         struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
1584
1585         return usb3_enable_pipe_n(usb3_ep, desc);
1586 }
1587
1588 static int renesas_usb3_ep_disable(struct usb_ep *_ep)
1589 {
1590         struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
1591         struct renesas_usb3_request *usb3_req;
1592
1593         do {
1594                 usb3_req = usb3_get_request(usb3_ep);
1595                 if (!usb3_req)
1596                         break;
1597                 usb3_request_done(usb3_ep, usb3_req, -ESHUTDOWN);
1598         } while (1);
1599
1600         return usb3_disable_pipe_n(usb3_ep);
1601 }
1602
1603 static struct usb_request *__renesas_usb3_ep_alloc_request(gfp_t gfp_flags)
1604 {
1605         struct renesas_usb3_request *usb3_req;
1606
1607         usb3_req = kzalloc(sizeof(struct renesas_usb3_request), gfp_flags);
1608         if (!usb3_req)
1609                 return NULL;
1610
1611         INIT_LIST_HEAD(&usb3_req->queue);
1612
1613         return &usb3_req->req;
1614 }
1615
1616 static void __renesas_usb3_ep_free_request(struct usb_request *_req)
1617 {
1618         struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req);
1619
1620         kfree(usb3_req);
1621 }
1622
1623 static struct usb_request *renesas_usb3_ep_alloc_request(struct usb_ep *_ep,
1624                                                          gfp_t gfp_flags)
1625 {
1626         return __renesas_usb3_ep_alloc_request(gfp_flags);
1627 }
1628
1629 static void renesas_usb3_ep_free_request(struct usb_ep *_ep,
1630                                          struct usb_request *_req)
1631 {
1632         __renesas_usb3_ep_free_request(_req);
1633 }
1634
1635 static int renesas_usb3_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
1636 {
1637         struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
1638         struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req);
1639         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1640
1641         dev_dbg(usb3_to_dev(usb3), "ep_dequeue: ep%2d, %u\n", usb3_ep->num,
1642                 _req->length);
1643
1644         usb3_request_done_pipen(usb3, usb3_ep, usb3_req, -ECONNRESET);
1645
1646         return 0;
1647 }
1648
1649 static int renesas_usb3_ep_set_halt(struct usb_ep *_ep, int value)
1650 {
1651         return usb3_set_halt(usb_ep_to_usb3_ep(_ep), !!value, false);
1652 }
1653
1654 static int renesas_usb3_ep_set_wedge(struct usb_ep *_ep)
1655 {
1656         struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
1657
1658         usb3_ep->wedge = true;
1659         return usb3_set_halt(usb3_ep, true, false);
1660 }
1661
1662 static void renesas_usb3_ep_fifo_flush(struct usb_ep *_ep)
1663 {
1664         struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
1665         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1666         unsigned long flags;
1667
1668         if (usb3_ep->num) {
1669                 spin_lock_irqsave(&usb3->lock, flags);
1670                 if (!usb3_pn_change(usb3, usb3_ep->num)) {
1671                         usb3_pn_con_clear(usb3);
1672                         usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON);
1673                 }
1674                 spin_unlock_irqrestore(&usb3->lock, flags);
1675         } else {
1676                 usb3_p0_con_clear_buffer(usb3);
1677         }
1678 }
1679
1680 static struct usb_ep_ops renesas_usb3_ep_ops = {
1681         .enable         = renesas_usb3_ep_enable,
1682         .disable        = renesas_usb3_ep_disable,
1683
1684         .alloc_request  = renesas_usb3_ep_alloc_request,
1685         .free_request   = renesas_usb3_ep_free_request,
1686
1687         .queue          = renesas_usb3_ep_queue,
1688         .dequeue        = renesas_usb3_ep_dequeue,
1689
1690         .set_halt       = renesas_usb3_ep_set_halt,
1691         .set_wedge      = renesas_usb3_ep_set_wedge,
1692         .fifo_flush     = renesas_usb3_ep_fifo_flush,
1693 };
1694
1695 /*------- usb_gadget_ops -------------------------------------------------*/
1696 static int renesas_usb3_start(struct usb_gadget *gadget,
1697                               struct usb_gadget_driver *driver)
1698 {
1699         struct renesas_usb3 *usb3;
1700
1701         if (!driver || driver->max_speed < USB_SPEED_FULL ||
1702             !driver->setup)
1703                 return -EINVAL;
1704
1705         usb3 = gadget_to_renesas_usb3(gadget);
1706
1707         /* hook up the driver */
1708         usb3->driver = driver;
1709
1710         renesas_usb3_init_controller(usb3);
1711
1712         return 0;
1713 }
1714
1715 static int renesas_usb3_stop(struct usb_gadget *gadget)
1716 {
1717         struct renesas_usb3 *usb3 = gadget_to_renesas_usb3(gadget);
1718         unsigned long flags;
1719
1720         spin_lock_irqsave(&usb3->lock, flags);
1721         usb3->softconnect = false;
1722         usb3->gadget.speed = USB_SPEED_UNKNOWN;
1723         usb3->driver = NULL;
1724         renesas_usb3_stop_controller(usb3);
1725         spin_unlock_irqrestore(&usb3->lock, flags);
1726
1727         return 0;
1728 }
1729
1730 static int renesas_usb3_get_frame(struct usb_gadget *_gadget)
1731 {
1732         return -EOPNOTSUPP;
1733 }
1734
1735 static int renesas_usb3_pullup(struct usb_gadget *gadget, int is_on)
1736 {
1737         struct renesas_usb3 *usb3 = gadget_to_renesas_usb3(gadget);
1738
1739         usb3->softconnect = !!is_on;
1740
1741         return 0;
1742 }
1743
1744 static int renesas_usb3_set_selfpowered(struct usb_gadget *gadget, int is_self)
1745 {
1746         gadget->is_selfpowered = !!is_self;
1747
1748         return 0;
1749 }
1750
1751 static const struct usb_gadget_ops renesas_usb3_gadget_ops = {
1752         .get_frame              = renesas_usb3_get_frame,
1753         .udc_start              = renesas_usb3_start,
1754         .udc_stop               = renesas_usb3_stop,
1755         .pullup                 = renesas_usb3_pullup,
1756         .set_selfpowered        = renesas_usb3_set_selfpowered,
1757 };
1758
1759 /*------- platform_driver ------------------------------------------------*/
1760 static int renesas_usb3_remove(struct platform_device *pdev)
1761 {
1762         struct renesas_usb3 *usb3 = platform_get_drvdata(pdev);
1763
1764         pm_runtime_put(&pdev->dev);
1765         pm_runtime_disable(&pdev->dev);
1766
1767         usb_del_gadget_udc(&usb3->gadget);
1768
1769         __renesas_usb3_ep_free_request(usb3->ep0_req);
1770
1771         return 0;
1772 }
1773
1774 static int renesas_usb3_init_ep(struct renesas_usb3 *usb3, struct device *dev,
1775                                 const struct renesas_usb3_priv *priv)
1776 {
1777         struct renesas_usb3_ep *usb3_ep;
1778         int i;
1779
1780         /* calculate num_usb3_eps from renesas_usb3_priv */
1781         usb3->num_usb3_eps = priv->ramsize_per_ramif * priv->num_ramif * 2 /
1782                              priv->ramsize_per_pipe + 1;
1783
1784         if (usb3->num_usb3_eps > USB3_MAX_NUM_PIPES)
1785                 usb3->num_usb3_eps = USB3_MAX_NUM_PIPES;
1786
1787         usb3->usb3_ep = devm_kzalloc(dev, sizeof(*usb3_ep) * usb3->num_usb3_eps,
1788                                      GFP_KERNEL);
1789         if (!usb3->usb3_ep)
1790                 return -ENOMEM;
1791
1792         dev_dbg(dev, "%s: num_usb3_eps = %d\n", __func__, usb3->num_usb3_eps);
1793         /*
1794          * This driver prepares pipes as the followings:
1795          *  - odd pipes = IN pipe
1796          *  - even pipes = OUT pipe (except pipe 0)
1797          */
1798         usb3_for_each_ep(usb3_ep, usb3, i) {
1799                 snprintf(usb3_ep->ep_name, sizeof(usb3_ep->ep_name), "ep%d", i);
1800                 usb3_ep->usb3 = usb3;
1801                 usb3_ep->num = i;
1802                 usb3_ep->ep.name = usb3_ep->ep_name;
1803                 usb3_ep->ep.ops = &renesas_usb3_ep_ops;
1804                 INIT_LIST_HEAD(&usb3_ep->queue);
1805                 INIT_LIST_HEAD(&usb3_ep->ep.ep_list);
1806                 if (!i) {
1807                         /* for control pipe */
1808                         usb3->gadget.ep0 = &usb3_ep->ep;
1809                         usb_ep_set_maxpacket_limit(&usb3_ep->ep,
1810                                                 USB3_EP0_HSFS_MAX_PACKET_SIZE);
1811                         usb3_ep->ep.caps.type_control = true;
1812                         usb3_ep->ep.caps.dir_in = true;
1813                         usb3_ep->ep.caps.dir_out = true;
1814                         continue;
1815                 }
1816
1817                 /* for bulk or interrupt pipe */
1818                 usb_ep_set_maxpacket_limit(&usb3_ep->ep, ~0);
1819                 list_add_tail(&usb3_ep->ep.ep_list, &usb3->gadget.ep_list);
1820                 usb3_ep->ep.caps.type_bulk = true;
1821                 usb3_ep->ep.caps.type_int = true;
1822                 if (i & 1)
1823                         usb3_ep->ep.caps.dir_in = true;
1824                 else
1825                         usb3_ep->ep.caps.dir_out = true;
1826         }
1827
1828         return 0;
1829 }
1830
1831 static void renesas_usb3_init_ram(struct renesas_usb3 *usb3, struct device *dev,
1832                                   const struct renesas_usb3_priv *priv)
1833 {
1834         struct renesas_usb3_ep *usb3_ep;
1835         int i;
1836         u32 ramif[2], basead[2];        /* index 0 = for IN pipes */
1837         u32 *cur_ramif, *cur_basead;
1838         u32 val;
1839
1840         memset(ramif, 0, sizeof(ramif));
1841         memset(basead, 0, sizeof(basead));
1842
1843         /*
1844          * This driver prepares pipes as the followings:
1845          *  - all pipes = the same size as "ramsize_per_pipe"
1846          * Please refer to the "Method of Specifying RAM Mapping"
1847          */
1848         usb3_for_each_ep(usb3_ep, usb3, i) {
1849                 if (!i)
1850                         continue;       /* out of scope if ep num = 0 */
1851                 if (usb3_ep->ep.caps.dir_in) {
1852                         cur_ramif = &ramif[0];
1853                         cur_basead = &basead[0];
1854                 } else {
1855                         cur_ramif = &ramif[1];
1856                         cur_basead = &basead[1];
1857                 }
1858
1859                 if (*cur_basead > priv->ramsize_per_ramif)
1860                         continue;       /* out of memory for IN or OUT pipe */
1861
1862                 /* calculate rammap_val */
1863                 val = PN_RAMMAP_RAMIF(*cur_ramif);
1864                 val |= usb3_calc_ramarea(priv->ramsize_per_pipe);
1865                 val |= PN_RAMMAP_BASEAD(*cur_basead);
1866                 usb3_ep->rammap_val = val;
1867
1868                 dev_dbg(dev, "ep%2d: val = %08x, ramif = %d, base = %x\n",
1869                         i, val, *cur_ramif, *cur_basead);
1870
1871                 /* update current ramif */
1872                 if (*cur_ramif + 1 == priv->num_ramif) {
1873                         *cur_ramif = 0;
1874                         *cur_basead += priv->ramsize_per_pipe;
1875                 } else {
1876                         (*cur_ramif)++;
1877                 }
1878         }
1879 }
1880
1881 static const struct renesas_usb3_priv renesas_usb3_priv_r8a7795 = {
1882         .ramsize_per_ramif = SZ_16K,
1883         .num_ramif = 2,
1884         .ramsize_per_pipe = SZ_4K,
1885         .workaround_for_vbus = true,
1886 };
1887
1888 static const struct of_device_id usb3_of_match[] = {
1889         {
1890                 .compatible = "renesas,r8a7795-usb3-peri",
1891                 .data = &renesas_usb3_priv_r8a7795,
1892         },
1893         { },
1894 };
1895 MODULE_DEVICE_TABLE(of, usb3_of_match);
1896
1897 static int renesas_usb3_probe(struct platform_device *pdev)
1898 {
1899         struct renesas_usb3 *usb3;
1900         struct resource *res;
1901         const struct of_device_id *match;
1902         int irq, ret;
1903         const struct renesas_usb3_priv *priv;
1904
1905         match = of_match_node(usb3_of_match, pdev->dev.of_node);
1906         if (!match)
1907                 return -ENODEV;
1908         priv = match->data;
1909
1910         irq = platform_get_irq(pdev, 0);
1911         if (irq < 0)
1912                 return -ENODEV;
1913
1914         usb3 = devm_kzalloc(&pdev->dev, sizeof(*usb3), GFP_KERNEL);
1915         if (!usb3)
1916                 return -ENOMEM;
1917
1918         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1919         usb3->reg = devm_ioremap_resource(&pdev->dev, res);
1920         if (IS_ERR(usb3->reg))
1921                 return PTR_ERR(usb3->reg);
1922
1923         platform_set_drvdata(pdev, usb3);
1924         spin_lock_init(&usb3->lock);
1925
1926         usb3->gadget.ops = &renesas_usb3_gadget_ops;
1927         usb3->gadget.name = udc_name;
1928         usb3->gadget.max_speed = USB_SPEED_SUPER;
1929         INIT_LIST_HEAD(&usb3->gadget.ep_list);
1930         ret = renesas_usb3_init_ep(usb3, &pdev->dev, priv);
1931         if (ret < 0)
1932                 return ret;
1933         renesas_usb3_init_ram(usb3, &pdev->dev, priv);
1934
1935         ret = devm_request_irq(&pdev->dev, irq, renesas_usb3_irq, 0,
1936                                dev_name(&pdev->dev), usb3);
1937         if (ret < 0)
1938                 return ret;
1939
1940         /* for ep0 handling */
1941         usb3->ep0_req = __renesas_usb3_ep_alloc_request(GFP_KERNEL);
1942         if (!usb3->ep0_req)
1943                 return -ENOMEM;
1944
1945         ret = usb_add_gadget_udc(&pdev->dev, &usb3->gadget);
1946         if (ret < 0)
1947                 goto err_add_udc;
1948
1949         usb3->workaround_for_vbus = priv->workaround_for_vbus;
1950
1951         pm_runtime_enable(&pdev->dev);
1952         pm_runtime_get_sync(&pdev->dev);
1953
1954         dev_info(&pdev->dev, "probed\n");
1955
1956         return 0;
1957
1958 err_add_udc:
1959         __renesas_usb3_ep_free_request(usb3->ep0_req);
1960
1961         return ret;
1962 }
1963
1964 static struct platform_driver renesas_usb3_driver = {
1965         .probe          = renesas_usb3_probe,
1966         .remove         = renesas_usb3_remove,
1967         .driver         = {
1968                 .name = (char *)udc_name,
1969                 .of_match_table = of_match_ptr(usb3_of_match),
1970         },
1971 };
1972 module_platform_driver(renesas_usb3_driver);
1973
1974 MODULE_DESCRIPTION("Renesas USB3.0 Peripheral driver");
1975 MODULE_LICENSE("GPL v2");
1976 MODULE_AUTHOR("Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>");
1977 MODULE_ALIAS("platform:renesas_usb3");