drivers/usb/gadget/udc/renesas_usb3.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Renesas USB3.0 Peripheral driver (USB gadget)
   4  *
   5  * Copyright (C) 2015-2017  Renesas Electronics Corporation
   6  */
   7
   8 #include <linux/debugfs.h>
   9 #include <linux/delay.h>
  10 #include <linux/dma-mapping.h>
  11 #include <linux/err.h>
  12 #include <linux/extcon-provider.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/phy/phy.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/pm_runtime.h>
  20 #include <linux/sizes.h>
  21 #include <linux/slab.h>
  22 #include <linux/string.h>
  23 #include <linux/sys_soc.h>
  24 #include <linux/uaccess.h>
  25 #include <linux/usb/ch9.h>
  26 #include <linux/usb/gadget.h>
  27 #include <linux/usb/of.h>
  28 #include <linux/usb/role.h>
  29
  30 /* register definitions */
  31 #define USB3_AXI_INT_STA        0x008
  32 #define USB3_AXI_INT_ENA        0x00c
  33 #define USB3_DMA_INT_STA        0x010
  34 #define USB3_DMA_INT_ENA        0x014
  35 #define USB3_DMA_CH0_CON(n)     (0x030 + ((n) - 1) * 0x10) /* n = 1 to 4 */
  36 #define USB3_DMA_CH0_PRD_ADR(n) (0x034 + ((n) - 1) * 0x10) /* n = 1 to 4 */
  37 #define USB3_USB_COM_CON        0x200
  38 #define USB3_USB20_CON          0x204
  39 #define USB3_USB30_CON          0x208
  40 #define USB3_USB_STA            0x210
  41 #define USB3_DRD_CON            0x218
  42 #define USB3_USB_INT_STA_1      0x220
  43 #define USB3_USB_INT_STA_2      0x224
  44 #define USB3_USB_INT_ENA_1      0x228
  45 #define USB3_USB_INT_ENA_2      0x22c
  46 #define USB3_STUP_DAT_0         0x230
  47 #define USB3_STUP_DAT_1         0x234
  48 #define USB3_USB_OTG_STA        0x268
  49 #define USB3_USB_OTG_INT_STA    0x26c
  50 #define USB3_USB_OTG_INT_ENA    0x270
  51 #define USB3_P0_MOD             0x280
  52 #define USB3_P0_CON             0x288
  53 #define USB3_P0_STA             0x28c
  54 #define USB3_P0_INT_STA         0x290
  55 #define USB3_P0_INT_ENA         0x294
  56 #define USB3_P0_LNG             0x2a0
  57 #define USB3_P0_READ            0x2a4
  58 #define USB3_P0_WRITE           0x2a8
  59 #define USB3_PIPE_COM           0x2b0
  60 #define USB3_PN_MOD             0x2c0
  61 #define USB3_PN_RAMMAP          0x2c4
  62 #define USB3_PN_CON             0x2c8
  63 #define USB3_PN_STA             0x2cc
  64 #define USB3_PN_INT_STA         0x2d0
  65 #define USB3_PN_INT_ENA         0x2d4
  66 #define USB3_PN_LNG             0x2e0
  67 #define USB3_PN_READ            0x2e4
  68 #define USB3_PN_WRITE           0x2e8
  69 #define USB3_SSIFCMD            0x340
  70
  71 /* AXI_INT_ENA and AXI_INT_STA */
  72 #define AXI_INT_DMAINT          BIT(31)
  73 #define AXI_INT_EPCINT          BIT(30)
  74 /* PRD's n = from 1 to 4 */
  75 #define AXI_INT_PRDEN_CLR_STA_SHIFT(n)  (16 + (n) - 1)
  76 #define AXI_INT_PRDERR_STA_SHIFT(n)     (0 + (n) - 1)
  77 #define AXI_INT_PRDEN_CLR_STA(n)        (1 << AXI_INT_PRDEN_CLR_STA_SHIFT(n))
  78 #define AXI_INT_PRDERR_STA(n)           (1 << AXI_INT_PRDERR_STA_SHIFT(n))
  79
  80 /* DMA_INT_ENA and DMA_INT_STA */
  81 #define DMA_INT(n)              BIT(n)
  82
  83 /* DMA_CH0_CONn */
  84 #define DMA_CON_PIPE_DIR        BIT(15)         /* 1: In Transfer */
  85 #define DMA_CON_PIPE_NO_SHIFT   8
  86 #define DMA_CON_PIPE_NO_MASK    GENMASK(12, DMA_CON_PIPE_NO_SHIFT)
  87 #define DMA_COM_PIPE_NO(n)      (((n) << DMA_CON_PIPE_NO_SHIFT) & \
  88                                          DMA_CON_PIPE_NO_MASK)
  89 #define DMA_CON_PRD_EN          BIT(0)
  90
  91 /* LCLKSEL */
  92 #define LCLKSEL_LSEL            BIT(18)
  93
  94 /* USB_COM_CON */
  95 #define USB_COM_CON_CONF                BIT(24)
  96 #define USB_COM_CON_PN_WDATAIF_NL       BIT(23)
  97 #define USB_COM_CON_PN_RDATAIF_NL       BIT(22)
  98 #define USB_COM_CON_PN_LSTTR_PP         BIT(21)
  99 #define USB_COM_CON_SPD_MODE            BIT(17)
 100 #define USB_COM_CON_EP0_EN              BIT(16)
 101 #define USB_COM_CON_DEV_ADDR_SHIFT      8
 102 #define USB_COM_CON_DEV_ADDR_MASK       GENMASK(14, USB_COM_CON_DEV_ADDR_SHIFT)
 103 #define USB_COM_CON_DEV_ADDR(n)         (((n) << USB_COM_CON_DEV_ADDR_SHIFT) & \
 104                                          USB_COM_CON_DEV_ADDR_MASK)
 105 #define USB_COM_CON_RX_DETECTION        BIT(1)
 106 #define USB_COM_CON_PIPE_CLR            BIT(0)
 107
 108 /* USB20_CON */
 109 #define USB20_CON_B2_PUE                BIT(31)
 110 #define USB20_CON_B2_SUSPEND            BIT(24)
 111 #define USB20_CON_B2_CONNECT            BIT(17)
 112 #define USB20_CON_B2_TSTMOD_SHIFT       8
 113 #define USB20_CON_B2_TSTMOD_MASK        GENMASK(10, USB20_CON_B2_TSTMOD_SHIFT)
 114 #define USB20_CON_B2_TSTMOD(n)          (((n) << USB20_CON_B2_TSTMOD_SHIFT) & \
 115                                          USB20_CON_B2_TSTMOD_MASK)
 116 #define USB20_CON_B2_TSTMOD_EN          BIT(0)
 117
 118 /* USB30_CON */
 119 #define USB30_CON_POW_SEL_SHIFT         24
 120 #define USB30_CON_POW_SEL_MASK          GENMASK(26, USB30_CON_POW_SEL_SHIFT)
 121 #define USB30_CON_POW_SEL_IN_U3         BIT(26)
 122 #define USB30_CON_POW_SEL_IN_DISCON     0
 123 #define USB30_CON_POW_SEL_P2_TO_P0      BIT(25)
 124 #define USB30_CON_POW_SEL_P0_TO_P3      BIT(24)
 125 #define USB30_CON_POW_SEL_P0_TO_P2      0
 126 #define USB30_CON_B3_PLLWAKE            BIT(23)
 127 #define USB30_CON_B3_CONNECT            BIT(17)
 128 #define USB30_CON_B3_HOTRST_CMP         BIT(1)
 129
 130 /* USB_STA */
 131 #define USB_STA_SPEED_MASK      (BIT(2) | BIT(1))
 132 #define USB_STA_SPEED_HS        BIT(2)
 133 #define USB_STA_SPEED_FS        BIT(1)
 134 #define USB_STA_SPEED_SS        0
 135 #define USB_STA_VBUS_STA        BIT(0)
 136
 137 /* DRD_CON */
 138 #define DRD_CON_PERI_CON        BIT(24)
 139 #define DRD_CON_VBOUT           BIT(0)
 140
 141 /* USB_INT_ENA_1 and USB_INT_STA_1 */
 142 #define USB_INT_1_B3_PLLWKUP    BIT(31)
 143 #define USB_INT_1_B3_LUPSUCS    BIT(30)
 144 #define USB_INT_1_B3_DISABLE    BIT(27)
 145 #define USB_INT_1_B3_WRMRST     BIT(21)
 146 #define USB_INT_1_B3_HOTRST     BIT(20)
 147 #define USB_INT_1_B2_USBRST     BIT(12)
 148 #define USB_INT_1_B2_L1SPND     BIT(11)
 149 #define USB_INT_1_B2_SPND       BIT(9)
 150 #define USB_INT_1_B2_RSUM       BIT(8)
 151 #define USB_INT_1_SPEED         BIT(1)
 152 #define USB_INT_1_VBUS_CNG      BIT(0)
 153
 154 /* USB_INT_ENA_2 and USB_INT_STA_2 */
 155 #define USB_INT_2_PIPE(n)       BIT(n)
 156
 157 /* USB_OTG_STA, USB_OTG_INT_STA and USB_OTG_INT_ENA */
 158 #define USB_OTG_IDMON           BIT(4)
 159
 160 /* P0_MOD */
 161 #define P0_MOD_DIR              BIT(6)
 162
 163 /* P0_CON and PN_CON */
 164 #define PX_CON_BYTE_EN_MASK             (BIT(10) | BIT(9))
 165 #define PX_CON_BYTE_EN_SHIFT            9
 166 #define PX_CON_BYTE_EN_BYTES(n)         (((n) << PX_CON_BYTE_EN_SHIFT) & \
 167                                          PX_CON_BYTE_EN_MASK)
 168 #define PX_CON_SEND                     BIT(8)
 169
 170 /* P0_CON */
 171 #define P0_CON_ST_RES_MASK              (BIT(27) | BIT(26))
 172 #define P0_CON_ST_RES_FORCE_STALL       BIT(27)
 173 #define P0_CON_ST_RES_NORMAL            BIT(26)
 174 #define P0_CON_ST_RES_FORCE_NRDY        0
 175 #define P0_CON_OT_RES_MASK              (BIT(25) | BIT(24))
 176 #define P0_CON_OT_RES_FORCE_STALL       BIT(25)
 177 #define P0_CON_OT_RES_NORMAL            BIT(24)
 178 #define P0_CON_OT_RES_FORCE_NRDY        0
 179 #define P0_CON_IN_RES_MASK              (BIT(17) | BIT(16))
 180 #define P0_CON_IN_RES_FORCE_STALL       BIT(17)
 181 #define P0_CON_IN_RES_NORMAL            BIT(16)
 182 #define P0_CON_IN_RES_FORCE_NRDY        0
 183 #define P0_CON_RES_WEN                  BIT(7)
 184 #define P0_CON_BCLR                     BIT(1)
 185
 186 /* P0_STA and PN_STA */
 187 #define PX_STA_BUFSTS           BIT(0)
 188
 189 /* P0_INT_ENA and P0_INT_STA */
 190 #define P0_INT_STSED            BIT(18)
 191 #define P0_INT_STSST            BIT(17)
 192 #define P0_INT_SETUP            BIT(16)
 193 #define P0_INT_RCVNL            BIT(8)
 194 #define P0_INT_ERDY             BIT(7)
 195 #define P0_INT_FLOW             BIT(6)
 196 #define P0_INT_STALL            BIT(2)
 197 #define P0_INT_NRDY             BIT(1)
 198 #define P0_INT_BFRDY            BIT(0)
 199 #define P0_INT_ALL_BITS         (P0_INT_STSED | P0_INT_SETUP | P0_INT_BFRDY)
 200
 201 /* PN_MOD */
 202 #define PN_MOD_DIR              BIT(6)
 203 #define PN_MOD_TYPE_SHIFT       4
 204 #define PN_MOD_TYPE_MASK        GENMASK(5, PN_MOD_TYPE_SHIFT)
 205 #define PN_MOD_TYPE(n)          (((n) << PN_MOD_TYPE_SHIFT) & \
 206                                  PN_MOD_TYPE_MASK)
 207 #define PN_MOD_EPNUM_MASK       GENMASK(3, 0)
 208 #define PN_MOD_EPNUM(n)         ((n) & PN_MOD_EPNUM_MASK)
 209
 210 /* PN_RAMMAP */
 211 #define PN_RAMMAP_RAMAREA_SHIFT 29
 212 #define PN_RAMMAP_RAMAREA_MASK  GENMASK(31, PN_RAMMAP_RAMAREA_SHIFT)
 213 #define PN_RAMMAP_RAMAREA_16KB  BIT(31)
 214 #define PN_RAMMAP_RAMAREA_8KB   (BIT(30) | BIT(29))
 215 #define PN_RAMMAP_RAMAREA_4KB   BIT(30)
 216 #define PN_RAMMAP_RAMAREA_2KB   BIT(29)
 217 #define PN_RAMMAP_RAMAREA_1KB   0
 218 #define PN_RAMMAP_MPKT_SHIFT    16
 219 #define PN_RAMMAP_MPKT_MASK     GENMASK(26, PN_RAMMAP_MPKT_SHIFT)
 220 #define PN_RAMMAP_MPKT(n)       (((n) << PN_RAMMAP_MPKT_SHIFT) & \
 221                                  PN_RAMMAP_MPKT_MASK)
 222 #define PN_RAMMAP_RAMIF_SHIFT   14
 223 #define PN_RAMMAP_RAMIF_MASK    GENMASK(15, PN_RAMMAP_RAMIF_SHIFT)
 224 #define PN_RAMMAP_RAMIF(n)      (((n) << PN_RAMMAP_RAMIF_SHIFT) & \
 225                                  PN_RAMMAP_RAMIF_MASK)
 226 #define PN_RAMMAP_BASEAD_MASK   GENMASK(13, 0)
 227 #define PN_RAMMAP_BASEAD(offs)  (((offs) >> 3) & PN_RAMMAP_BASEAD_MASK)
 228 #define PN_RAMMAP_DATA(area, ramif, basead)     ((PN_RAMMAP_##area) | \
 229                                                  (PN_RAMMAP_RAMIF(ramif)) | \
 230                                                  (PN_RAMMAP_BASEAD(basead)))
 231
 232 /* PN_CON */
 233 #define PN_CON_EN               BIT(31)
 234 #define PN_CON_DATAIF_EN        BIT(30)
 235 #define PN_CON_RES_MASK         (BIT(17) | BIT(16))
 236 #define PN_CON_RES_FORCE_STALL  BIT(17)
 237 #define PN_CON_RES_NORMAL       BIT(16)
 238 #define PN_CON_RES_FORCE_NRDY   0
 239 #define PN_CON_LAST             BIT(11)
 240 #define PN_CON_RES_WEN          BIT(7)
 241 #define PN_CON_CLR              BIT(0)
 242
 243 /* PN_INT_STA and PN_INT_ENA */
 244 #define PN_INT_LSTTR    BIT(4)
 245 #define PN_INT_BFRDY    BIT(0)
 246
 247 /* USB3_SSIFCMD */
 248 #define SSIFCMD_URES_U2         BIT(9)
 249 #define SSIFCMD_URES_U1         BIT(8)
 250 #define SSIFCMD_UDIR_U2         BIT(7)
 251 #define SSIFCMD_UDIR_U1         BIT(6)
 252 #define SSIFCMD_UREQ_U2         BIT(5)
 253 #define SSIFCMD_UREQ_U1         BIT(4)
 254
 255 #define USB3_EP0_SS_MAX_PACKET_SIZE     512
 256 #define USB3_EP0_HSFS_MAX_PACKET_SIZE   64
 257 #define USB3_EP0_BUF_SIZE               8
 258 #define USB3_MAX_NUM_PIPES              6       /* This includes PIPE 0 */
 259 #define USB3_WAIT_US                    3
 260 #define USB3_DMA_NUM_SETTING_AREA       4
 261 /*
 262  * To avoid double-meaning of "0" (xferred 65536 bytes or received zlp if
 263  * buffer size is 65536), this driver uses the maximum size per a entry is
 264  * 32768 bytes.
 265  */
 266 #define USB3_DMA_MAX_XFER_SIZE          32768
 267 #define USB3_DMA_PRD_SIZE               4096
 268
 269 struct renesas_usb3;
 270
 271 /* Physical Region Descriptor Table */
 272 struct renesas_usb3_prd {
 273         u32 word1;
 274 #define USB3_PRD1_E             BIT(30)         /* the end of chain */
 275 #define USB3_PRD1_U             BIT(29)         /* completion of transfer */
 276 #define USB3_PRD1_D             BIT(28)         /* Error occurred */
 277 #define USB3_PRD1_INT           BIT(27)         /* Interrupt occurred */
 278 #define USB3_PRD1_LST           BIT(26)         /* Last Packet */
 279 #define USB3_PRD1_B_INC         BIT(24)
 280 #define USB3_PRD1_MPS_8         0
 281 #define USB3_PRD1_MPS_16        BIT(21)
 282 #define USB3_PRD1_MPS_32        BIT(22)
 283 #define USB3_PRD1_MPS_64        (BIT(22) | BIT(21))
 284 #define USB3_PRD1_MPS_512       BIT(23)
 285 #define USB3_PRD1_MPS_1024      (BIT(23) | BIT(21))
 286 #define USB3_PRD1_MPS_RESERVED  (BIT(23) | BIT(22) | BIT(21))
 287 #define USB3_PRD1_SIZE_MASK     GENMASK(15, 0)
 288
 289         u32 bap;
 290 };
 291 #define USB3_DMA_NUM_PRD_ENTRIES        (USB3_DMA_PRD_SIZE / \
 292                                           sizeof(struct renesas_usb3_prd))
 293 #define USB3_DMA_MAX_XFER_SIZE_ALL_PRDS (USB3_DMA_PRD_SIZE / \
 294                                          sizeof(struct renesas_usb3_prd) * \
 295                                          USB3_DMA_MAX_XFER_SIZE)
 296
 297 struct renesas_usb3_dma {
 298         struct renesas_usb3_prd *prd;
 299         dma_addr_t prd_dma;
 300         int num;        /* Setting area number (from 1 to 4) */
 301         bool used;
 302 };
 303
 304 struct renesas_usb3_request {
 305         struct usb_request      req;
 306         struct list_head        queue;
 307 };
 308
 309 #define USB3_EP_NAME_SIZE       8
 310 struct renesas_usb3_ep {
 311         struct usb_ep ep;
 312         struct renesas_usb3 *usb3;
 313         struct renesas_usb3_dma *dma;
 314         int num;
 315         char ep_name[USB3_EP_NAME_SIZE];
 316         struct list_head queue;
 317         u32 rammap_val;
 318         bool dir_in;
 319         bool halt;
 320         bool wedge;
 321         bool started;
 322 };
 323
 324 struct renesas_usb3_priv {
 325         int ramsize_per_ramif;          /* unit = bytes */
 326         int num_ramif;
 327         int ramsize_per_pipe;           /* unit = bytes */
 328         bool workaround_for_vbus;       /* if true, don't check vbus signal */
 329 };
 330
 331 struct renesas_usb3 {
 332         void __iomem *reg;
 333
 334         struct usb_gadget gadget;
 335         struct usb_gadget_driver *driver;
 336         struct extcon_dev *extcon;
 337         struct work_struct extcon_work;
 338         struct phy *phy;
 339         struct dentry *dentry;
 340
 341         struct usb_role_switch *role_sw;
 342         struct device *host_dev;
 343         struct work_struct role_work;
 344         enum usb_role role;
 345
 346         struct renesas_usb3_ep *usb3_ep;
 347         int num_usb3_eps;
 348
 349         struct renesas_usb3_dma dma[USB3_DMA_NUM_SETTING_AREA];
 350
 351         spinlock_t lock;
 352         int disabled_count;
 353
 354         struct usb_request *ep0_req;
 355
 356         enum usb_role connection_state;
 357         u16 test_mode;
 358         u8 ep0_buf[USB3_EP0_BUF_SIZE];
 359         bool softconnect;
 360         bool workaround_for_vbus;
 361         bool extcon_host;               /* check id and set EXTCON_USB_HOST */
 362         bool extcon_usb;                /* check vbus and set EXTCON_USB */
 363         bool forced_b_device;
 364         bool start_to_connect;
 365         bool role_sw_by_connector;
 366 };
 367
 368 #define gadget_to_renesas_usb3(_gadget) \
 369                 container_of(_gadget, struct renesas_usb3, gadget)
 370 #define renesas_usb3_to_gadget(renesas_usb3) (&renesas_usb3->gadget)
 371 #define usb3_to_dev(_usb3)      (_usb3->gadget.dev.parent)
 372
 373 #define usb_ep_to_usb3_ep(_ep) container_of(_ep, struct renesas_usb3_ep, ep)
 374 #define usb3_ep_to_usb3(_usb3_ep) (_usb3_ep->usb3)
 375 #define usb_req_to_usb3_req(_req) container_of(_req, \
 376                                             struct renesas_usb3_request, req)
 377
 378 #define usb3_get_ep(usb3, n) ((usb3)->usb3_ep + (n))
 379 #define usb3_for_each_ep(usb3_ep, usb3, i)                      \
 380                 for ((i) = 0, usb3_ep = usb3_get_ep(usb3, (i)); \
 381                      (i) < (usb3)->num_usb3_eps;                \
 382                      (i)++, usb3_ep = usb3_get_ep(usb3, (i)))
 383
 384 #define usb3_get_dma(usb3, i)   (&(usb3)->dma[i])
 385 #define usb3_for_each_dma(usb3, dma, i)                         \
 386                 for ((i) = 0, dma = usb3_get_dma((usb3), (i));  \
 387                      (i) < USB3_DMA_NUM_SETTING_AREA;           \
 388                      (i)++, dma = usb3_get_dma((usb3), (i)))
 389
 390 static const char udc_name[] = "renesas_usb3";
 391
 392 static bool use_dma = 1;
 393 module_param(use_dma, bool, 0644);
 394 MODULE_PARM_DESC(use_dma, "use dedicated DMAC");
 395
 396 static void usb3_write(struct renesas_usb3 *usb3, u32 data, u32 offs)
 397 {
 398         iowrite32(data, usb3->reg + offs);
 399 }
 400
 401 static u32 usb3_read(struct renesas_usb3 *usb3, u32 offs)
 402 {
 403         return ioread32(usb3->reg + offs);
 404 }
 405
 406 static void usb3_set_bit(struct renesas_usb3 *usb3, u32 bits, u32 offs)
 407 {
 408         u32 val = usb3_read(usb3, offs);
 409
 410         val |= bits;
 411         usb3_write(usb3, val, offs);
 412 }
 413
 414 static void usb3_clear_bit(struct renesas_usb3 *usb3, u32 bits, u32 offs)
 415 {
 416         u32 val = usb3_read(usb3, offs);
 417
 418         val &= ~bits;
 419         usb3_write(usb3, val, offs);
 420 }
 421
 422 static int usb3_wait(struct renesas_usb3 *usb3, u32 reg, u32 mask,
 423                      u32 expected)
 424 {
 425         int i;
 426
 427         for (i = 0; i < USB3_WAIT_US; i++) {
 428                 if ((usb3_read(usb3, reg) & mask) == expected)
 429                         return 0;
 430                 udelay(1);
 431         }
 432
 433         dev_dbg(usb3_to_dev(usb3), "%s: timed out (%8x, %08x, %08x)\n",
 434                 __func__, reg, mask, expected);
 435
 436         return -EBUSY;
 437 }
 438
 439 static void renesas_usb3_extcon_work(struct work_struct *work)
 440 {
 441         struct renesas_usb3 *usb3 = container_of(work, struct renesas_usb3,
 442                                                  extcon_work);
 443
 444         extcon_set_state_sync(usb3->extcon, EXTCON_USB_HOST, usb3->extcon_host);
 445         extcon_set_state_sync(usb3->extcon, EXTCON_USB, usb3->extcon_usb);
 446 }
 447
 448 static void usb3_enable_irq_1(struct renesas_usb3 *usb3, u32 bits)
 449 {
 450         usb3_set_bit(usb3, bits, USB3_USB_INT_ENA_1);
 451 }
 452
 453 static void usb3_disable_irq_1(struct renesas_usb3 *usb3, u32 bits)
 454 {
 455         usb3_clear_bit(usb3, bits, USB3_USB_INT_ENA_1);
 456 }
 457
 458 static void usb3_enable_pipe_irq(struct renesas_usb3 *usb3, int num)
 459 {
 460         usb3_set_bit(usb3, USB_INT_2_PIPE(num), USB3_USB_INT_ENA_2);
 461 }
 462
 463 static void usb3_disable_pipe_irq(struct renesas_usb3 *usb3, int num)
 464 {
 465         usb3_clear_bit(usb3, USB_INT_2_PIPE(num), USB3_USB_INT_ENA_2);
 466 }
 467
 468 static bool usb3_is_host(struct renesas_usb3 *usb3)
 469 {
 470         return !(usb3_read(usb3, USB3_DRD_CON) & DRD_CON_PERI_CON);
 471 }
 472
 473 static void usb3_init_axi_bridge(struct renesas_usb3 *usb3)
 474 {
 475         /* Set AXI_INT */
 476         usb3_write(usb3, ~0, USB3_DMA_INT_STA);
 477         usb3_write(usb3, 0, USB3_DMA_INT_ENA);
 478         usb3_set_bit(usb3, AXI_INT_DMAINT | AXI_INT_EPCINT, USB3_AXI_INT_ENA);
 479 }
 480
 481 static void usb3_init_epc_registers(struct renesas_usb3 *usb3)
 482 {
 483         usb3_write(usb3, ~0, USB3_USB_INT_STA_1);
 484         if (!usb3->workaround_for_vbus)
 485                 usb3_enable_irq_1(usb3, USB_INT_1_VBUS_CNG);
 486 }
 487
 488 static bool usb3_wakeup_usb2_phy(struct renesas_usb3 *usb3)
 489 {
 490         if (!(usb3_read(usb3, USB3_USB20_CON) & USB20_CON_B2_SUSPEND))
 491                 return true;    /* already waked it up */
 492
 493         usb3_clear_bit(usb3, USB20_CON_B2_SUSPEND, USB3_USB20_CON);
 494         usb3_enable_irq_1(usb3, USB_INT_1_B2_RSUM);
 495
 496         return false;
 497 }
 498
 499 static void usb3_usb2_pullup(struct renesas_usb3 *usb3, int pullup)
 500 {
 501         u32 bits = USB20_CON_B2_PUE | USB20_CON_B2_CONNECT;
 502
 503         if (usb3->softconnect && pullup)
 504                 usb3_set_bit(usb3, bits, USB3_USB20_CON);
 505         else
 506                 usb3_clear_bit(usb3, bits, USB3_USB20_CON);
 507 }
 508
 509 static void usb3_set_test_mode(struct renesas_usb3 *usb3)
 510 {
 511         u32 val = usb3_read(usb3, USB3_USB20_CON);
 512
 513         val &= ~USB20_CON_B2_TSTMOD_MASK;
 514         val |= USB20_CON_B2_TSTMOD(usb3->test_mode);
 515         usb3_write(usb3, val | USB20_CON_B2_TSTMOD_EN, USB3_USB20_CON);
 516         if (!usb3->test_mode)
 517                 usb3_clear_bit(usb3, USB20_CON_B2_TSTMOD_EN, USB3_USB20_CON);
 518 }
 519
 520 static void usb3_start_usb2_connection(struct renesas_usb3 *usb3)
 521 {
 522         usb3->disabled_count++;
 523         usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
 524         usb3_set_bit(usb3, USB_COM_CON_SPD_MODE, USB3_USB_COM_CON);
 525         usb3_usb2_pullup(usb3, 1);
 526 }
 527
 528 static int usb3_is_usb3_phy_in_u3(struct renesas_usb3 *usb3)
 529 {
 530         return usb3_read(usb3, USB3_USB30_CON) & USB30_CON_POW_SEL_IN_U3;
 531 }
 532
 533 static bool usb3_wakeup_usb3_phy(struct renesas_usb3 *usb3)
 534 {
 535         if (!usb3_is_usb3_phy_in_u3(usb3))
 536                 return true;    /* already waked it up */
 537
 538         usb3_set_bit(usb3, USB30_CON_B3_PLLWAKE, USB3_USB30_CON);
 539         usb3_enable_irq_1(usb3, USB_INT_1_B3_PLLWKUP);
 540
 541         return false;
 542 }
 543
 544 static u16 usb3_feature_get_un_enabled(struct renesas_usb3 *usb3)
 545 {
 546         u32 mask_u2 = SSIFCMD_UDIR_U2 | SSIFCMD_UREQ_U2;
 547         u32 mask_u1 = SSIFCMD_UDIR_U1 | SSIFCMD_UREQ_U1;
 548         u32 val = usb3_read(usb3, USB3_SSIFCMD);
 549         u16 ret = 0;
 550
 551         /* Enables {U2,U1} if the bits of UDIR and UREQ are set to 0 */
 552         if (!(val & mask_u2))
 553                 ret |= 1 << USB_DEV_STAT_U2_ENABLED;
 554         if (!(val & mask_u1))
 555                 ret |= 1 << USB_DEV_STAT_U1_ENABLED;
 556
 557         return ret;
 558 }
 559
 560 static void usb3_feature_u2_enable(struct renesas_usb3 *usb3, bool enable)
 561 {
 562         u32 bits = SSIFCMD_UDIR_U2 | SSIFCMD_UREQ_U2;
 563
 564         /* Enables U2 if the bits of UDIR and UREQ are set to 0 */
 565         if (enable)
 566                 usb3_clear_bit(usb3, bits, USB3_SSIFCMD);
 567         else
 568                 usb3_set_bit(usb3, bits, USB3_SSIFCMD);
 569 }
 570
 571 static void usb3_feature_u1_enable(struct renesas_usb3 *usb3, bool enable)
 572 {
 573         u32 bits = SSIFCMD_UDIR_U1 | SSIFCMD_UREQ_U1;
 574
 575         /* Enables U1 if the bits of UDIR and UREQ are set to 0 */
 576         if (enable)
 577                 usb3_clear_bit(usb3, bits, USB3_SSIFCMD);
 578         else
 579                 usb3_set_bit(usb3, bits, USB3_SSIFCMD);
 580 }
 581
 582 static void usb3_start_operation_for_usb3(struct renesas_usb3 *usb3)
 583 {
 584         usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
 585         usb3_clear_bit(usb3, USB_COM_CON_SPD_MODE, USB3_USB_COM_CON);
 586         usb3_set_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON);
 587 }
 588
 589 static void usb3_start_usb3_connection(struct renesas_usb3 *usb3)
 590 {
 591         usb3_start_operation_for_usb3(usb3);
 592         usb3_set_bit(usb3, USB_COM_CON_RX_DETECTION, USB3_USB_COM_CON);
 593
 594         usb3_enable_irq_1(usb3, USB_INT_1_B3_LUPSUCS | USB_INT_1_B3_DISABLE |
 595                           USB_INT_1_SPEED);
 596 }
 597
 598 static void usb3_stop_usb3_connection(struct renesas_usb3 *usb3)
 599 {
 600         usb3_clear_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON);
 601 }
 602
 603 static void usb3_transition_to_default_state(struct renesas_usb3 *usb3,
 604                                              bool is_usb3)
 605 {
 606         usb3_set_bit(usb3, USB_INT_2_PIPE(0), USB3_USB_INT_ENA_2);
 607         usb3_write(usb3, P0_INT_ALL_BITS, USB3_P0_INT_STA);
 608         usb3_set_bit(usb3, P0_INT_ALL_BITS, USB3_P0_INT_ENA);
 609
 610         if (is_usb3)
 611                 usb3_enable_irq_1(usb3, USB_INT_1_B3_WRMRST |
 612                                   USB_INT_1_B3_HOTRST);
 613         else
 614                 usb3_enable_irq_1(usb3, USB_INT_1_B2_SPND |
 615                                   USB_INT_1_B2_L1SPND | USB_INT_1_B2_USBRST);
 616 }
 617
 618 static void usb3_connect(struct renesas_usb3 *usb3)
 619 {
 620         if (usb3_wakeup_usb3_phy(usb3))
 621                 usb3_start_usb3_connection(usb3);
 622 }
 623
 624 static void usb3_reset_epc(struct renesas_usb3 *usb3)
 625 {
 626         usb3_clear_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON);
 627         usb3_clear_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
 628         usb3_set_bit(usb3, USB_COM_CON_PIPE_CLR, USB3_USB_COM_CON);
 629         usb3->test_mode = 0;
 630         usb3_set_test_mode(usb3);
 631 }
 632
 633 static void usb3_disconnect(struct renesas_usb3 *usb3)
 634 {
 635         usb3->disabled_count = 0;
 636         usb3_usb2_pullup(usb3, 0);
 637         usb3_clear_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON);
 638         usb3_reset_epc(usb3);
 639         usb3_disable_irq_1(usb3, USB_INT_1_B2_RSUM | USB_INT_1_B3_PLLWKUP |
 640                            USB_INT_1_B3_LUPSUCS | USB_INT_1_B3_DISABLE |
 641                            USB_INT_1_SPEED | USB_INT_1_B3_WRMRST |
 642                            USB_INT_1_B3_HOTRST | USB_INT_1_B2_SPND |
 643                            USB_INT_1_B2_L1SPND | USB_INT_1_B2_USBRST);
 644         usb3_clear_bit(usb3, USB_COM_CON_SPD_MODE, USB3_USB_COM_CON);
 645         usb3_init_epc_registers(usb3);
 646
 647         if (usb3->driver)
 648                 usb3->driver->disconnect(&usb3->gadget);
 649 }
 650
 651 static void usb3_check_vbus(struct renesas_usb3 *usb3)
 652 {
 653         if (usb3->workaround_for_vbus) {
 654                 usb3_connect(usb3);
 655         } else {
 656                 usb3->extcon_usb = !!(usb3_read(usb3, USB3_USB_STA) &
 657                                                         USB_STA_VBUS_STA);
 658                 if (usb3->extcon_usb)
 659                         usb3_connect(usb3);
 660                 else
 661                         usb3_disconnect(usb3);
 662
 663                 schedule_work(&usb3->extcon_work);
 664         }
 665 }
 666
 667 static void renesas_usb3_role_work(struct work_struct *work)
 668 {
 669         struct renesas_usb3 *usb3 =
 670                         container_of(work, struct renesas_usb3, role_work);
 671
 672         usb_role_switch_set_role(usb3->role_sw, usb3->role);
 673 }
 674
 675 static void usb3_set_mode(struct renesas_usb3 *usb3, bool host)
 676 {
 677         if (host)
 678                 usb3_clear_bit(usb3, DRD_CON_PERI_CON, USB3_DRD_CON);
 679         else
 680                 usb3_set_bit(usb3, DRD_CON_PERI_CON, USB3_DRD_CON);
 681 }
 682
 683 static void usb3_set_mode_by_role_sw(struct renesas_usb3 *usb3, bool host)
 684 {
 685         if (usb3->role_sw) {
 686                 usb3->role = host ? USB_ROLE_HOST : USB_ROLE_DEVICE;
 687                 schedule_work(&usb3->role_work);
 688         } else {
 689                 usb3_set_mode(usb3, host);
 690         }
 691 }
 692
 693 static void usb3_vbus_out(struct renesas_usb3 *usb3, bool enable)
 694 {
 695         if (enable)
 696                 usb3_set_bit(usb3, DRD_CON_VBOUT, USB3_DRD_CON);
 697         else
 698                 usb3_clear_bit(usb3, DRD_CON_VBOUT, USB3_DRD_CON);
 699 }
 700
 701 static void usb3_mode_config(struct renesas_usb3 *usb3, bool host, bool a_dev)
 702 {
 703         unsigned long flags;
 704
 705         spin_lock_irqsave(&usb3->lock, flags);
 706         if (!usb3->role_sw_by_connector ||
 707             usb3->connection_state != USB_ROLE_NONE) {
 708                 usb3_set_mode_by_role_sw(usb3, host);
 709                 usb3_vbus_out(usb3, a_dev);
 710         }
 711         /* for A-Peripheral or forced B-device mode */
 712         if ((!host && a_dev) || usb3->start_to_connect)
 713                 usb3_connect(usb3);
 714         spin_unlock_irqrestore(&usb3->lock, flags);
 715 }
 716
 717 static bool usb3_is_a_device(struct renesas_usb3 *usb3)
 718 {
 719         return !(usb3_read(usb3, USB3_USB_OTG_STA) & USB_OTG_IDMON);
 720 }
 721
 722 static void usb3_check_id(struct renesas_usb3 *usb3)
 723 {
 724         usb3->extcon_host = usb3_is_a_device(usb3);
 725
 726         if ((!usb3->role_sw_by_connector && usb3->extcon_host &&
 727              !usb3->forced_b_device) || usb3->connection_state == USB_ROLE_HOST)
 728                 usb3_mode_config(usb3, true, true);
 729         else
 730                 usb3_mode_config(usb3, false, false);
 731
 732         schedule_work(&usb3->extcon_work);
 733 }
 734
 735 static void renesas_usb3_init_controller(struct renesas_usb3 *usb3)
 736 {
 737         usb3_init_axi_bridge(usb3);
 738         usb3_init_epc_registers(usb3);
 739         usb3_set_bit(usb3, USB_COM_CON_PN_WDATAIF_NL |
 740                      USB_COM_CON_PN_RDATAIF_NL | USB_COM_CON_PN_LSTTR_PP,
 741                      USB3_USB_COM_CON);
 742         usb3_write(usb3, USB_OTG_IDMON, USB3_USB_OTG_INT_STA);
 743         usb3_write(usb3, USB_OTG_IDMON, USB3_USB_OTG_INT_ENA);
 744
 745         usb3_check_id(usb3);
 746         usb3_check_vbus(usb3);
 747 }
 748
 749 static void renesas_usb3_stop_controller(struct renesas_usb3 *usb3)
 750 {
 751         usb3_disconnect(usb3);
 752         usb3_write(usb3, 0, USB3_P0_INT_ENA);
 753         usb3_write(usb3, 0, USB3_USB_OTG_INT_ENA);
 754         usb3_write(usb3, 0, USB3_USB_INT_ENA_1);
 755         usb3_write(usb3, 0, USB3_USB_INT_ENA_2);
 756         usb3_write(usb3, 0, USB3_AXI_INT_ENA);
 757 }
 758
 759 static void usb3_irq_epc_int_1_pll_wakeup(struct renesas_usb3 *usb3)
 760 {
 761         usb3_disable_irq_1(usb3, USB_INT_1_B3_PLLWKUP);
 762         usb3_clear_bit(usb3, USB30_CON_B3_PLLWAKE, USB3_USB30_CON);
 763         usb3_start_usb3_connection(usb3);
 764 }
 765
 766 static void usb3_irq_epc_int_1_linkup_success(struct renesas_usb3 *usb3)
 767 {
 768         usb3_transition_to_default_state(usb3, true);
 769 }
 770
 771 static void usb3_irq_epc_int_1_resume(struct renesas_usb3 *usb3)
 772 {
 773         usb3_disable_irq_1(usb3, USB_INT_1_B2_RSUM);
 774         usb3_start_usb2_connection(usb3);
 775         usb3_transition_to_default_state(usb3, false);
 776 }
 777
 778 static void usb3_irq_epc_int_1_disable(struct renesas_usb3 *usb3)
 779 {
 780         usb3_stop_usb3_connection(usb3);
 781         if (usb3_wakeup_usb2_phy(usb3))
 782                 usb3_irq_epc_int_1_resume(usb3);
 783 }
 784
 785 static void usb3_irq_epc_int_1_bus_reset(struct renesas_usb3 *usb3)
 786 {
 787         usb3_reset_epc(usb3);
 788         if (usb3->disabled_count < 3)
 789                 usb3_start_usb3_connection(usb3);
 790         else
 791                 usb3_start_usb2_connection(usb3);
 792 }
 793
 794 static void usb3_irq_epc_int_1_vbus_change(struct renesas_usb3 *usb3)
 795 {
 796         usb3_check_vbus(usb3);
 797 }
 798
 799 static void usb3_irq_epc_int_1_hot_reset(struct renesas_usb3 *usb3)
 800 {
 801         usb3_reset_epc(usb3);
 802         usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
 803
 804         /* This bit shall be set within 12ms from the start of HotReset */
 805         usb3_set_bit(usb3, USB30_CON_B3_HOTRST_CMP, USB3_USB30_CON);
 806 }
 807
 808 static void usb3_irq_epc_int_1_warm_reset(struct renesas_usb3 *usb3)
 809 {
 810         usb3_reset_epc(usb3);
 811         usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
 812
 813         usb3_start_operation_for_usb3(usb3);
 814         usb3_enable_irq_1(usb3, USB_INT_1_SPEED);
 815 }
 816
 817 static void usb3_irq_epc_int_1_speed(struct renesas_usb3 *usb3)
 818 {
 819         u32 speed = usb3_read(usb3, USB3_USB_STA) & USB_STA_SPEED_MASK;
 820
 821         switch (speed) {
 822         case USB_STA_SPEED_SS:
 823                 usb3->gadget.speed = USB_SPEED_SUPER;
 824                 usb3->gadget.ep0->maxpacket = USB3_EP0_SS_MAX_PACKET_SIZE;
 825                 break;
 826         case USB_STA_SPEED_HS:
 827                 usb3->gadget.speed = USB_SPEED_HIGH;
 828                 usb3->gadget.ep0->maxpacket = USB3_EP0_HSFS_MAX_PACKET_SIZE;
 829                 break;
 830         case USB_STA_SPEED_FS:
 831                 usb3->gadget.speed = USB_SPEED_FULL;
 832                 usb3->gadget.ep0->maxpacket = USB3_EP0_HSFS_MAX_PACKET_SIZE;
 833                 break;
 834         default:
 835                 usb3->gadget.speed = USB_SPEED_UNKNOWN;
 836                 break;
 837         }
 838 }
 839
 840 static void usb3_irq_epc_int_1(struct renesas_usb3 *usb3, u32 int_sta_1)
 841 {
 842         if (int_sta_1 & USB_INT_1_B3_PLLWKUP)
 843                 usb3_irq_epc_int_1_pll_wakeup(usb3);
 844
 845         if (int_sta_1 & USB_INT_1_B3_LUPSUCS)
 846                 usb3_irq_epc_int_1_linkup_success(usb3);
 847
 848         if (int_sta_1 & USB_INT_1_B3_HOTRST)
 849                 usb3_irq_epc_int_1_hot_reset(usb3);
 850
 851         if (int_sta_1 & USB_INT_1_B3_WRMRST)
 852                 usb3_irq_epc_int_1_warm_reset(usb3);
 853
 854         if (int_sta_1 & USB_INT_1_B3_DISABLE)
 855                 usb3_irq_epc_int_1_disable(usb3);
 856
 857         if (int_sta_1 & USB_INT_1_B2_USBRST)
 858                 usb3_irq_epc_int_1_bus_reset(usb3);
 859
 860         if (int_sta_1 & USB_INT_1_B2_RSUM)
 861                 usb3_irq_epc_int_1_resume(usb3);
 862
 863         if (int_sta_1 & USB_INT_1_SPEED)
 864                 usb3_irq_epc_int_1_speed(usb3);
 865
 866         if (int_sta_1 & USB_INT_1_VBUS_CNG)
 867                 usb3_irq_epc_int_1_vbus_change(usb3);
 868 }
 869
 870 static struct renesas_usb3_request *__usb3_get_request(struct renesas_usb3_ep
 871                                                        *usb3_ep)
 872 {
 873         return list_first_entry_or_null(&usb3_ep->queue,
 874                                         struct renesas_usb3_request, queue);
 875 }
 876
 877 static struct renesas_usb3_request *usb3_get_request(struct renesas_usb3_ep
 878                                                      *usb3_ep)
 879 {
 880         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
 881         struct renesas_usb3_request *usb3_req;
 882         unsigned long flags;
 883
 884         spin_lock_irqsave(&usb3->lock, flags);
 885         usb3_req = __usb3_get_request(usb3_ep);
 886         spin_unlock_irqrestore(&usb3->lock, flags);
 887
 888         return usb3_req;
 889 }
 890
 891 static void __usb3_request_done(struct renesas_usb3_ep *usb3_ep,
 892                                 struct renesas_usb3_request *usb3_req,
 893                                 int status)
 894 {
 895         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
 896
 897         dev_dbg(usb3_to_dev(usb3), "giveback: ep%2d, %u, %u, %d\n",
 898                 usb3_ep->num, usb3_req->req.length, usb3_req->req.actual,
 899                 status);
 900         usb3_req->req.status = status;
 901         usb3_ep->started = false;
 902         list_del_init(&usb3_req->queue);
 903         spin_unlock(&usb3->lock);
 904         usb_gadget_giveback_request(&usb3_ep->ep, &usb3_req->req);
 905         spin_lock(&usb3->lock);
 906 }
 907
 908 static void usb3_request_done(struct renesas_usb3_ep *usb3_ep,
 909                               struct renesas_usb3_request *usb3_req, int status)
 910 {
 911         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
 912         unsigned long flags;
 913
 914         spin_lock_irqsave(&usb3->lock, flags);
 915         __usb3_request_done(usb3_ep, usb3_req, status);
 916         spin_unlock_irqrestore(&usb3->lock, flags);
 917 }
 918
 919 static void usb3_irq_epc_pipe0_status_end(struct renesas_usb3 *usb3)
 920 {
 921         struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
 922         struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
 923
 924         if (usb3_req)
 925                 usb3_request_done(usb3_ep, usb3_req, 0);
 926         if (usb3->test_mode)
 927                 usb3_set_test_mode(usb3);
 928 }
 929
 930 static void usb3_get_setup_data(struct renesas_usb3 *usb3,
 931                                 struct usb_ctrlrequest *ctrl)
 932 {
 933         struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
 934         u32 *data = (u32 *)ctrl;
 935
 936         *data++ = usb3_read(usb3, USB3_STUP_DAT_0);
 937         *data = usb3_read(usb3, USB3_STUP_DAT_1);
 938
 939         /* update this driver's flag */
 940         usb3_ep->dir_in = !!(ctrl->bRequestType & USB_DIR_IN);
 941 }
 942
 943 static void usb3_set_p0_con_update_res(struct renesas_usb3 *usb3, u32 res)
 944 {
 945         u32 val = usb3_read(usb3, USB3_P0_CON);
 946
 947         val &= ~(P0_CON_ST_RES_MASK | P0_CON_OT_RES_MASK | P0_CON_IN_RES_MASK);
 948         val |= res | P0_CON_RES_WEN;
 949         usb3_write(usb3, val, USB3_P0_CON);
 950 }
 951
 952 static void usb3_set_p0_con_for_ctrl_read_data(struct renesas_usb3 *usb3)
 953 {
 954         usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY |
 955                                    P0_CON_OT_RES_FORCE_STALL |
 956                                    P0_CON_IN_RES_NORMAL);
 957 }
 958
 959 static void usb3_set_p0_con_for_ctrl_read_status(struct renesas_usb3 *usb3)
 960 {
 961         usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL |
 962                                    P0_CON_OT_RES_FORCE_STALL |
 963                                    P0_CON_IN_RES_NORMAL);
 964 }
 965
 966 static void usb3_set_p0_con_for_ctrl_write_data(struct renesas_usb3 *usb3)
 967 {
 968         usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY |
 969                                    P0_CON_OT_RES_NORMAL |
 970                                    P0_CON_IN_RES_FORCE_STALL);
 971 }
 972
 973 static void usb3_set_p0_con_for_ctrl_write_status(struct renesas_usb3 *usb3)
 974 {
 975         usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL |
 976                                    P0_CON_OT_RES_NORMAL |
 977                                    P0_CON_IN_RES_FORCE_STALL);
 978 }
 979
 980 static void usb3_set_p0_con_for_no_data(struct renesas_usb3 *usb3)
 981 {
 982         usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL |
 983                                    P0_CON_OT_RES_FORCE_STALL |
 984                                    P0_CON_IN_RES_FORCE_STALL);
 985 }
 986
 987 static void usb3_set_p0_con_stall(struct renesas_usb3 *usb3)
 988 {
 989         usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_STALL |
 990                                    P0_CON_OT_RES_FORCE_STALL |
 991                                    P0_CON_IN_RES_FORCE_STALL);
 992 }
 993
 994 static void usb3_set_p0_con_stop(struct renesas_usb3 *usb3)
 995 {
 996         usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY |
 997                                    P0_CON_OT_RES_FORCE_NRDY |
 998                                    P0_CON_IN_RES_FORCE_NRDY);
 999 }
1000
1001 static int usb3_pn_change(struct renesas_usb3 *usb3, int num)
1002 {
1003         if (num == 0 || num > usb3->num_usb3_eps)
1004                 return -ENXIO;
1005
1006         usb3_write(usb3, num, USB3_PIPE_COM);
1007
1008         return 0;
1009 }
1010
1011 static void usb3_set_pn_con_update_res(struct renesas_usb3 *usb3, u32 res)
1012 {
1013         u32 val = usb3_read(usb3, USB3_PN_CON);
1014
1015         val &= ~PN_CON_RES_MASK;
1016         val |= res & PN_CON_RES_MASK;
1017         val |= PN_CON_RES_WEN;
1018         usb3_write(usb3, val, USB3_PN_CON);
1019 }
1020
1021 static void usb3_pn_start(struct renesas_usb3 *usb3)
1022 {
1023         usb3_set_pn_con_update_res(usb3, PN_CON_RES_NORMAL);
1024 }
1025
1026 static void usb3_pn_stop(struct renesas_usb3 *usb3)
1027 {
1028         usb3_set_pn_con_update_res(usb3, PN_CON_RES_FORCE_NRDY);
1029 }
1030
1031 static void usb3_pn_stall(struct renesas_usb3 *usb3)
1032 {
1033         usb3_set_pn_con_update_res(usb3, PN_CON_RES_FORCE_STALL);
1034 }
1035
1036 static int usb3_pn_con_clear(struct renesas_usb3 *usb3)
1037 {
1038         usb3_set_bit(usb3, PN_CON_CLR, USB3_PN_CON);
1039
1040         return usb3_wait(usb3, USB3_PN_CON, PN_CON_CLR, 0);
1041 }
1042
1043 static bool usb3_is_transfer_complete(struct renesas_usb3_ep *usb3_ep,
1044                                       struct renesas_usb3_request *usb3_req)
1045 {
1046         struct usb_request *req = &usb3_req->req;
1047
1048         if ((!req->zero && req->actual == req->length) ||
1049             (req->actual % usb3_ep->ep.maxpacket) || (req->length == 0))
1050                 return true;
1051         else
1052                 return false;
1053 }
1054
1055 static int usb3_wait_pipe_status(struct renesas_usb3_ep *usb3_ep, u32 mask)
1056 {
1057         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1058         u32 sta_reg = usb3_ep->num ? USB3_PN_STA : USB3_P0_STA;
1059
1060         return usb3_wait(usb3, sta_reg, mask, mask);
1061 }
1062
1063 static void usb3_set_px_con_send(struct renesas_usb3_ep *usb3_ep, int bytes,
1064                                  bool last)
1065 {
1066         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1067         u32 con_reg = usb3_ep->num ? USB3_PN_CON : USB3_P0_CON;
1068         u32 val = usb3_read(usb3, con_reg);
1069
1070         val |= PX_CON_SEND | PX_CON_BYTE_EN_BYTES(bytes);
1071         val |= (usb3_ep->num && last) ? PN_CON_LAST : 0;
1072         usb3_write(usb3, val, con_reg);
1073 }
1074
1075 static int usb3_write_pipe(struct renesas_usb3_ep *usb3_ep,
1076                            struct renesas_usb3_request *usb3_req,
1077                            u32 fifo_reg)
1078 {
1079         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1080         int i;
1081         int len = min_t(unsigned, usb3_req->req.length - usb3_req->req.actual,
1082                         usb3_ep->ep.maxpacket);
1083         u8 *buf = usb3_req->req.buf + usb3_req->req.actual;
1084         u32 tmp = 0;
1085         bool is_last = !len ? true : false;
1086
1087         if (usb3_wait_pipe_status(usb3_ep, PX_STA_BUFSTS) < 0)
1088                 return -EBUSY;
1089
1090         /* Update gadget driver parameter */
1091         usb3_req->req.actual += len;
1092
1093         /* Write data to the register */
1094         if (len >= 4) {
1095                 iowrite32_rep(usb3->reg + fifo_reg, buf, len / 4);
1096                 buf += (len / 4) * 4;
1097                 len %= 4;       /* update len to use usb3_set_pX_con_send() */
1098         }
1099
1100         if (len) {
1101                 for (i = 0; i < len; i++)
1102                         tmp |= buf[i] << (8 * i);
1103                 usb3_write(usb3, tmp, fifo_reg);
1104         }
1105
1106         if (!is_last)
1107                 is_last = usb3_is_transfer_complete(usb3_ep, usb3_req);
1108         /* Send the data */
1109         usb3_set_px_con_send(usb3_ep, len, is_last);
1110
1111         return is_last ? 0 : -EAGAIN;
1112 }
1113
1114 static u32 usb3_get_received_length(struct renesas_usb3_ep *usb3_ep)
1115 {
1116         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1117         u32 lng_reg = usb3_ep->num ? USB3_PN_LNG : USB3_P0_LNG;
1118
1119         return usb3_read(usb3, lng_reg);
1120 }
1121
1122 static int usb3_read_pipe(struct renesas_usb3_ep *usb3_ep,
1123                           struct renesas_usb3_request *usb3_req, u32 fifo_reg)
1124 {
1125         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1126         int i;
1127         int len = min_t(unsigned, usb3_req->req.length - usb3_req->req.actual,
1128                         usb3_get_received_length(usb3_ep));
1129         u8 *buf = usb3_req->req.buf + usb3_req->req.actual;
1130         u32 tmp = 0;
1131
1132         if (!len)
1133                 return 0;
1134
1135         /* Update gadget driver parameter */
1136         usb3_req->req.actual += len;
1137
1138         /* Read data from the register */
1139         if (len >= 4) {
1140                 ioread32_rep(usb3->reg + fifo_reg, buf, len / 4);
1141                 buf += (len / 4) * 4;
1142                 len %= 4;
1143         }
1144
1145         if (len) {
1146                 tmp = usb3_read(usb3, fifo_reg);
1147                 for (i = 0; i < len; i++)
1148                         buf[i] = (tmp >> (8 * i)) & 0xff;
1149         }
1150
1151         return usb3_is_transfer_complete(usb3_ep, usb3_req) ? 0 : -EAGAIN;
1152 }
1153
1154 static void usb3_set_status_stage(struct renesas_usb3_ep *usb3_ep,
1155                                   struct renesas_usb3_request *usb3_req)
1156 {
1157         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1158
1159         if (usb3_ep->dir_in) {
1160                 usb3_set_p0_con_for_ctrl_read_status(usb3);
1161         } else {
1162                 if (!usb3_req->req.length)
1163                         usb3_set_p0_con_for_no_data(usb3);
1164                 else
1165                         usb3_set_p0_con_for_ctrl_write_status(usb3);
1166         }
1167 }
1168
1169 static void usb3_p0_xfer(struct renesas_usb3_ep *usb3_ep,
1170                          struct renesas_usb3_request *usb3_req)
1171 {
1172         int ret;
1173
1174         if (usb3_ep->dir_in)
1175                 ret = usb3_write_pipe(usb3_ep, usb3_req, USB3_P0_WRITE);
1176         else
1177                 ret = usb3_read_pipe(usb3_ep, usb3_req, USB3_P0_READ);
1178
1179         if (!ret)
1180                 usb3_set_status_stage(usb3_ep, usb3_req);
1181 }
1182
1183 static void usb3_start_pipe0(struct renesas_usb3_ep *usb3_ep,
1184                              struct renesas_usb3_request *usb3_req)
1185 {
1186         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1187
1188         if (usb3_ep->started)
1189                 return;
1190
1191         usb3_ep->started = true;
1192
1193         if (usb3_ep->dir_in) {
1194                 usb3_set_bit(usb3, P0_MOD_DIR, USB3_P0_MOD);
1195                 usb3_set_p0_con_for_ctrl_read_data(usb3);
1196         } else {
1197                 usb3_clear_bit(usb3, P0_MOD_DIR, USB3_P0_MOD);
1198                 if (usb3_req->req.length)
1199                         usb3_set_p0_con_for_ctrl_write_data(usb3);
1200         }
1201
1202         usb3_p0_xfer(usb3_ep, usb3_req);
1203 }
1204
1205 static void usb3_enable_dma_pipen(struct renesas_usb3 *usb3)
1206 {
1207         usb3_set_bit(usb3, PN_CON_DATAIF_EN, USB3_PN_CON);
1208 }
1209
1210 static void usb3_disable_dma_pipen(struct renesas_usb3 *usb3)
1211 {
1212         usb3_clear_bit(usb3, PN_CON_DATAIF_EN, USB3_PN_CON);
1213 }
1214
1215 static void usb3_enable_dma_irq(struct renesas_usb3 *usb3, int num)
1216 {
1217         usb3_set_bit(usb3, DMA_INT(num), USB3_DMA_INT_ENA);
1218 }
1219
1220 static void usb3_disable_dma_irq(struct renesas_usb3 *usb3, int num)
1221 {
1222         usb3_clear_bit(usb3, DMA_INT(num), USB3_DMA_INT_ENA);
1223 }
1224
1225 static u32 usb3_dma_mps_to_prd_word1(struct renesas_usb3_ep *usb3_ep)
1226 {
1227         switch (usb3_ep->ep.maxpacket) {
1228         case 8:
1229                 return USB3_PRD1_MPS_8;
1230         case 16:
1231                 return USB3_PRD1_MPS_16;
1232         case 32:
1233                 return USB3_PRD1_MPS_32;
1234         case 64:
1235                 return USB3_PRD1_MPS_64;
1236         case 512:
1237                 return USB3_PRD1_MPS_512;
1238         case 1024:
1239                 return USB3_PRD1_MPS_1024;
1240         default:
1241                 return USB3_PRD1_MPS_RESERVED;
1242         }
1243 }
1244
1245 static bool usb3_dma_get_setting_area(struct renesas_usb3_ep *usb3_ep,
1246                                       struct renesas_usb3_request *usb3_req)
1247 {
1248         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1249         struct renesas_usb3_dma *dma;
1250         int i;
1251         bool ret = false;
1252
1253         if (usb3_req->req.length > USB3_DMA_MAX_XFER_SIZE_ALL_PRDS) {
1254                 dev_dbg(usb3_to_dev(usb3), "%s: the length is too big (%d)\n",
1255                         __func__, usb3_req->req.length);
1256                 return false;
1257         }
1258
1259         /* The driver doesn't handle zero-length packet via dmac */
1260         if (!usb3_req->req.length)
1261                 return false;
1262
1263         if (usb3_dma_mps_to_prd_word1(usb3_ep) == USB3_PRD1_MPS_RESERVED)
1264                 return false;
1265
1266         usb3_for_each_dma(usb3, dma, i) {
1267                 if (dma->used)
1268                         continue;
1269
1270                 if (usb_gadget_map_request(&usb3->gadget, &usb3_req->req,
1271                                            usb3_ep->dir_in) < 0)
1272                         break;
1273
1274                 dma->used = true;
1275                 usb3_ep->dma = dma;
1276                 ret = true;
1277                 break;
1278         }
1279
1280         return ret;
1281 }
1282
1283 static void usb3_dma_put_setting_area(struct renesas_usb3_ep *usb3_ep,
1284                                       struct renesas_usb3_request *usb3_req)
1285 {
1286         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1287         int i;
1288         struct renesas_usb3_dma *dma;
1289
1290         usb3_for_each_dma(usb3, dma, i) {
1291                 if (usb3_ep->dma == dma) {
1292                         usb_gadget_unmap_request(&usb3->gadget, &usb3_req->req,
1293                                                  usb3_ep->dir_in);
1294                         dma->used = false;
1295                         usb3_ep->dma = NULL;
1296                         break;
1297                 }
1298         }
1299 }
1300
1301 static void usb3_dma_fill_prd(struct renesas_usb3_ep *usb3_ep,
1302                               struct renesas_usb3_request *usb3_req)
1303 {
1304         struct renesas_usb3_prd *cur_prd = usb3_ep->dma->prd;
1305         u32 remain = usb3_req->req.length;
1306         u32 dma = usb3_req->req.dma;
1307         u32 len;
1308         int i = 0;
1309
1310         do {
1311                 len = min_t(u32, remain, USB3_DMA_MAX_XFER_SIZE) &
1312                             USB3_PRD1_SIZE_MASK;
1313                 cur_prd->word1 = usb3_dma_mps_to_prd_word1(usb3_ep) |
1314                                  USB3_PRD1_B_INC | len;
1315                 cur_prd->bap = dma;
1316                 remain -= len;
1317                 dma += len;
1318                 if (!remain || (i + 1) < USB3_DMA_NUM_PRD_ENTRIES)
1319                         break;
1320
1321                 cur_prd++;
1322                 i++;
1323         } while (1);
1324
1325         cur_prd->word1 |= USB3_PRD1_E | USB3_PRD1_INT;
1326         if (usb3_ep->dir_in)
1327                 cur_prd->word1 |= USB3_PRD1_LST;
1328 }
1329
1330 static void usb3_dma_kick_prd(struct renesas_usb3_ep *usb3_ep)
1331 {
1332         struct renesas_usb3_dma *dma = usb3_ep->dma;
1333         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1334         u32 dma_con = DMA_COM_PIPE_NO(usb3_ep->num) | DMA_CON_PRD_EN;
1335
1336         if (usb3_ep->dir_in)
1337                 dma_con |= DMA_CON_PIPE_DIR;
1338
1339         wmb();  /* prd entries should be in system memory here */
1340
1341         usb3_write(usb3, 1 << usb3_ep->num, USB3_DMA_INT_STA);
1342         usb3_write(usb3, AXI_INT_PRDEN_CLR_STA(dma->num) |
1343                    AXI_INT_PRDERR_STA(dma->num), USB3_AXI_INT_STA);
1344
1345         usb3_write(usb3, dma->prd_dma, USB3_DMA_CH0_PRD_ADR(dma->num));
1346         usb3_write(usb3, dma_con, USB3_DMA_CH0_CON(dma->num));
1347         usb3_enable_dma_irq(usb3, usb3_ep->num);
1348 }
1349
1350 static void usb3_dma_stop_prd(struct renesas_usb3_ep *usb3_ep)
1351 {
1352         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1353         struct renesas_usb3_dma *dma = usb3_ep->dma;
1354
1355         usb3_disable_dma_irq(usb3, usb3_ep->num);
1356         usb3_write(usb3, 0, USB3_DMA_CH0_CON(dma->num));
1357 }
1358
1359 static int usb3_dma_update_status(struct renesas_usb3_ep *usb3_ep,
1360                                   struct renesas_usb3_request *usb3_req)
1361 {
1362         struct renesas_usb3_prd *cur_prd = usb3_ep->dma->prd;
1363         struct usb_request *req = &usb3_req->req;
1364         u32 remain, len;
1365         int i = 0;
1366         int status = 0;
1367
1368         rmb();  /* The controller updated prd entries */
1369
1370         do {
1371                 if (cur_prd->word1 & USB3_PRD1_D)
1372                         status = -EIO;
1373                 if (cur_prd->word1 & USB3_PRD1_E)
1374                         len = req->length % USB3_DMA_MAX_XFER_SIZE;
1375                 else
1376                         len = USB3_DMA_MAX_XFER_SIZE;
1377                 remain = cur_prd->word1 & USB3_PRD1_SIZE_MASK;
1378                 req->actual += len - remain;
1379
1380                 if (cur_prd->word1 & USB3_PRD1_E ||
1381                     (i + 1) < USB3_DMA_NUM_PRD_ENTRIES)
1382                         break;
1383
1384                 cur_prd++;
1385                 i++;
1386         } while (1);
1387
1388         return status;
1389 }
1390
1391 static bool usb3_dma_try_start(struct renesas_usb3_ep *usb3_ep,
1392                                struct renesas_usb3_request *usb3_req)
1393 {
1394         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1395
1396         if (!use_dma)
1397                 return false;
1398
1399         if (usb3_dma_get_setting_area(usb3_ep, usb3_req)) {
1400                 usb3_pn_stop(usb3);
1401                 usb3_enable_dma_pipen(usb3);
1402                 usb3_dma_fill_prd(usb3_ep, usb3_req);
1403                 usb3_dma_kick_prd(usb3_ep);
1404                 usb3_pn_start(usb3);
1405                 return true;
1406         }
1407
1408         return false;
1409 }
1410
1411 static int usb3_dma_try_stop(struct renesas_usb3_ep *usb3_ep,
1412                              struct renesas_usb3_request *usb3_req)
1413 {
1414         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1415         unsigned long flags;
1416         int status = 0;
1417
1418         spin_lock_irqsave(&usb3->lock, flags);
1419         if (!usb3_ep->dma)
1420                 goto out;
1421
1422         if (!usb3_pn_change(usb3, usb3_ep->num))
1423                 usb3_disable_dma_pipen(usb3);
1424         usb3_dma_stop_prd(usb3_ep);
1425         status = usb3_dma_update_status(usb3_ep, usb3_req);
1426         usb3_dma_put_setting_area(usb3_ep, usb3_req);
1427
1428 out:
1429         spin_unlock_irqrestore(&usb3->lock, flags);
1430         return status;
1431 }
1432
1433 static int renesas_usb3_dma_free_prd(struct renesas_usb3 *usb3,
1434                                      struct device *dev)
1435 {
1436         int i;
1437         struct renesas_usb3_dma *dma;
1438
1439         usb3_for_each_dma(usb3, dma, i) {
1440                 if (dma->prd) {
1441                         dma_free_coherent(dev, USB3_DMA_PRD_SIZE,
1442                                           dma->prd, dma->prd_dma);
1443                         dma->prd = NULL;
1444                 }
1445         }
1446
1447         return 0;
1448 }
1449
1450 static int renesas_usb3_dma_alloc_prd(struct renesas_usb3 *usb3,
1451                                       struct device *dev)
1452 {
1453         int i;
1454         struct renesas_usb3_dma *dma;
1455
1456         if (!use_dma)
1457                 return 0;
1458
1459         usb3_for_each_dma(usb3, dma, i) {
1460                 dma->prd = dma_alloc_coherent(dev, USB3_DMA_PRD_SIZE,
1461                                               &dma->prd_dma, GFP_KERNEL);
1462                 if (!dma->prd) {
1463                         renesas_usb3_dma_free_prd(usb3, dev);
1464                         return -ENOMEM;
1465                 }
1466                 dma->num = i + 1;
1467         }
1468
1469         return 0;
1470 }
1471
1472 static void usb3_start_pipen(struct renesas_usb3_ep *usb3_ep,
1473                              struct renesas_usb3_request *usb3_req)
1474 {
1475         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1476         struct renesas_usb3_request *usb3_req_first = usb3_get_request(usb3_ep);
1477         unsigned long flags;
1478         int ret = -EAGAIN;
1479         u32 enable_bits = 0;
1480
1481         spin_lock_irqsave(&usb3->lock, flags);
1482         if (usb3_ep->halt || usb3_ep->started)
1483                 goto out;
1484         if (usb3_req != usb3_req_first)
1485                 goto out;
1486
1487         if (usb3_pn_change(usb3, usb3_ep->num) < 0)
1488                 goto out;
1489
1490         usb3_ep->started = true;
1491
1492         if (usb3_dma_try_start(usb3_ep, usb3_req))
1493                 goto out;
1494
1495         usb3_pn_start(usb3);
1496
1497         if (usb3_ep->dir_in) {
1498                 ret = usb3_write_pipe(usb3_ep, usb3_req, USB3_PN_WRITE);
1499                 enable_bits |= PN_INT_LSTTR;
1500         }
1501
1502         if (ret < 0)
1503                 enable_bits |= PN_INT_BFRDY;
1504
1505         if (enable_bits) {
1506                 usb3_set_bit(usb3, enable_bits, USB3_PN_INT_ENA);
1507                 usb3_enable_pipe_irq(usb3, usb3_ep->num);
1508         }
1509 out:
1510         spin_unlock_irqrestore(&usb3->lock, flags);
1511 }
1512
1513 static int renesas_usb3_ep_queue(struct usb_ep *_ep, struct usb_request *_req,
1514                                  gfp_t gfp_flags)
1515 {
1516         struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
1517         struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req);
1518         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1519         unsigned long flags;
1520
1521         dev_dbg(usb3_to_dev(usb3), "ep_queue: ep%2d, %u\n", usb3_ep->num,
1522                 _req->length);
1523
1524         _req->status = -EINPROGRESS;
1525         _req->actual = 0;
1526         spin_lock_irqsave(&usb3->lock, flags);
1527         list_add_tail(&usb3_req->queue, &usb3_ep->queue);
1528         spin_unlock_irqrestore(&usb3->lock, flags);
1529
1530         if (!usb3_ep->num)
1531                 usb3_start_pipe0(usb3_ep, usb3_req);
1532         else
1533                 usb3_start_pipen(usb3_ep, usb3_req);
1534
1535         return 0;
1536 }
1537
1538 static void usb3_set_device_address(struct renesas_usb3 *usb3, u16 addr)
1539 {
1540         /* DEV_ADDR bit field is cleared by WarmReset, HotReset and BusReset */
1541         usb3_set_bit(usb3, USB_COM_CON_DEV_ADDR(addr), USB3_USB_COM_CON);
1542 }
1543
1544 static bool usb3_std_req_set_address(struct renesas_usb3 *usb3,
1545                                      struct usb_ctrlrequest *ctrl)
1546 {
1547         if (ctrl->wValue >= 128)
1548                 return true;    /* stall */
1549
1550         usb3_set_device_address(usb3, ctrl->wValue);
1551         usb3_set_p0_con_for_no_data(usb3);
1552
1553         return false;
1554 }
1555
1556 static void usb3_pipe0_internal_xfer(struct renesas_usb3 *usb3,
1557                                      void *tx_data, size_t len,
1558                                      void (*complete)(struct usb_ep *ep,
1559                                                       struct usb_request *req))
1560 {
1561         struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
1562
1563         if (tx_data)
1564                 memcpy(usb3->ep0_buf, tx_data,
1565                        min_t(size_t, len, USB3_EP0_BUF_SIZE));
1566
1567         usb3->ep0_req->buf = &usb3->ep0_buf;
1568         usb3->ep0_req->length = len;
1569         usb3->ep0_req->complete = complete;
1570         renesas_usb3_ep_queue(&usb3_ep->ep, usb3->ep0_req, GFP_ATOMIC);
1571 }
1572
1573 static void usb3_pipe0_get_status_completion(struct usb_ep *ep,
1574                                              struct usb_request *req)
1575 {
1576 }
1577
1578 static bool usb3_std_req_get_status(struct renesas_usb3 *usb3,
1579                                     struct usb_ctrlrequest *ctrl)
1580 {
1581         bool stall = false;
1582         struct renesas_usb3_ep *usb3_ep;
1583         int num;
1584         u16 status = 0;
1585
1586         switch (ctrl->bRequestType & USB_RECIP_MASK) {
1587         case USB_RECIP_DEVICE:
1588                 if (usb3->gadget.is_selfpowered)
1589                         status |= 1 << USB_DEVICE_SELF_POWERED;
1590                 if (usb3->gadget.speed == USB_SPEED_SUPER)
1591                         status |= usb3_feature_get_un_enabled(usb3);
1592                 break;
1593         case USB_RECIP_INTERFACE:
1594                 break;
1595         case USB_RECIP_ENDPOINT:
1596                 num = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
1597                 usb3_ep = usb3_get_ep(usb3, num);
1598                 if (usb3_ep->halt)
1599                         status |= 1 << USB_ENDPOINT_HALT;
1600                 break;
1601         default:
1602                 stall = true;
1603                 break;
1604         }
1605
1606         if (!stall) {
1607                 status = cpu_to_le16(status);
1608                 dev_dbg(usb3_to_dev(usb3), "get_status: req = %p\n",
1609                         usb_req_to_usb3_req(usb3->ep0_req));
1610                 usb3_pipe0_internal_xfer(usb3, &status, sizeof(status),
1611                                          usb3_pipe0_get_status_completion);
1612         }
1613
1614         return stall;
1615 }
1616
1617 static bool usb3_std_req_feature_device(struct renesas_usb3 *usb3,
1618                                         struct usb_ctrlrequest *ctrl, bool set)
1619 {
1620         bool stall = true;
1621         u16 w_value = le16_to_cpu(ctrl->wValue);
1622
1623         switch (w_value) {
1624         case USB_DEVICE_TEST_MODE:
1625                 if (!set)
1626                         break;
1627                 usb3->test_mode = le16_to_cpu(ctrl->wIndex) >> 8;
1628                 stall = false;
1629                 break;
1630         case USB_DEVICE_U1_ENABLE:
1631         case USB_DEVICE_U2_ENABLE:
1632                 if (usb3->gadget.speed != USB_SPEED_SUPER)
1633                         break;
1634                 if (w_value == USB_DEVICE_U1_ENABLE)
1635                         usb3_feature_u1_enable(usb3, set);
1636                 if (w_value == USB_DEVICE_U2_ENABLE)
1637                         usb3_feature_u2_enable(usb3, set);
1638                 stall = false;
1639                 break;
1640         default:
1641                 break;
1642         }
1643
1644         return stall;
1645 }
1646
1647 static int usb3_set_halt_p0(struct renesas_usb3_ep *usb3_ep, bool halt)
1648 {
1649         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1650
1651         if (unlikely(usb3_ep->num))
1652                 return -EINVAL;
1653
1654         usb3_ep->halt = halt;
1655         if (halt)
1656                 usb3_set_p0_con_stall(usb3);
1657         else
1658                 usb3_set_p0_con_stop(usb3);
1659
1660         return 0;
1661 }
1662
1663 static int usb3_set_halt_pn(struct renesas_usb3_ep *usb3_ep, bool halt,
1664                             bool is_clear_feature)
1665 {
1666         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
1667         unsigned long flags;
1668
1669         spin_lock_irqsave(&usb3->lock, flags);
1670         if (!usb3_pn_change(usb3, usb3_ep->num)) {
1671                 usb3_ep->halt = halt;
1672                 if (halt) {
1673                         usb3_pn_stall(usb3);
1674                 } else if (!is_clear_feature || !usb3_ep->wedge) {
1675                         usb3_pn_con_clear(usb3);
1676                         usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON);
1677                         usb3_pn_stop(usb3);
1678                 }
1679         }
1680         spin_unlock_irqrestore(&usb3->lock, flags);
1681
1682         return 0;
1683 }
1684
1685 static int usb3_set_halt(struct renesas_usb3_ep *usb3_ep, bool halt,
1686                          bool is_clear_feature)
1687 {
1688         int ret = 0;
1689
1690         if (halt && usb3_ep->started)
1691                 return -EAGAIN;
1692
1693         if (usb3_ep->num)
1694                 ret = usb3_set_halt_pn(usb3_ep, halt, is_clear_feature);
1695         else
1696                 ret = usb3_set_halt_p0(usb3_ep, halt);
1697
1698         return ret;
1699 }
1700
1701 static bool usb3_std_req_feature_endpoint(struct renesas_usb3 *usb3,
1702                                           struct usb_ctrlrequest *ctrl,
1703                                           bool set)
1704 {
1705         int num = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
1706         struct renesas_usb3_ep *usb3_ep;
1707         struct renesas_usb3_request *usb3_req;
1708
1709         if (le16_to_cpu(ctrl->wValue) != USB_ENDPOINT_HALT)
1710                 return true;    /* stall */
1711
1712         usb3_ep = usb3_get_ep(usb3, num);
1713         usb3_set_halt(usb3_ep, set, true);
1714
1715         /* Restarts a queue if clear feature */
1716         if (!set) {
1717                 usb3_ep->started = false;
1718                 usb3_req = usb3_get_request(usb3_ep);
1719                 if (usb3_req)
1720                         usb3_start_pipen(usb3_ep, usb3_req);
1721         }
1722
1723         return false;
1724 }
1725
1726 static bool usb3_std_req_feature(struct renesas_usb3 *usb3,
1727                                  struct usb_ctrlrequest *ctrl, bool set)
1728 {
1729         bool stall = false;
1730
1731         switch (ctrl->bRequestType & USB_RECIP_MASK) {
1732         case USB_RECIP_DEVICE:
1733                 stall = usb3_std_req_feature_device(usb3, ctrl, set);
1734                 break;
1735         case USB_RECIP_INTERFACE:
1736                 break;
1737         case USB_RECIP_ENDPOINT:
1738                 stall = usb3_std_req_feature_endpoint(usb3, ctrl, set);
1739                 break;
1740         default:
1741                 stall = true;
1742                 break;
1743         }
1744
1745         if (!stall)
1746                 usb3_set_p0_con_for_no_data(usb3);
1747
1748         return stall;
1749 }
1750
1751 static void usb3_pipe0_set_sel_completion(struct usb_ep *ep,
1752                                           struct usb_request *req)
1753 {
1754         /* TODO */
1755 }
1756
1757 static bool usb3_std_req_set_sel(struct renesas_usb3 *usb3,
1758                                  struct usb_ctrlrequest *ctrl)
1759 {
1760         u16 w_length = le16_to_cpu(ctrl->wLength);
1761
1762         if (w_length != 6)
1763                 return true;    /* stall */
1764
1765         dev_dbg(usb3_to_dev(usb3), "set_sel: req = %p\n",
1766                 usb_req_to_usb3_req(usb3->ep0_req));
1767         usb3_pipe0_internal_xfer(usb3, NULL, 6, usb3_pipe0_set_sel_completion);
1768
1769         return false;
1770 }
1771
1772 static bool usb3_std_req_set_configuration(struct renesas_usb3 *usb3,
1773                                            struct usb_ctrlrequest *ctrl)
1774 {
1775         if (ctrl->wValue > 0)
1776                 usb3_set_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON);
1777         else
1778                 usb3_clear_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON);
1779
1780         return false;
1781 }
1782
1783 /**
1784  * usb3_handle_standard_request - handle some standard requests
1785  * @usb3: the renesas_usb3 pointer
1786  * @ctrl: a pointer of setup data
1787  *
1788  * Returns true if this function handled a standard request
1789  */
1790 static bool usb3_handle_standard_request(struct renesas_usb3 *usb3,
1791                                          struct usb_ctrlrequest *ctrl)
1792 {
1793         bool ret = false;
1794         bool stall = false;
1795
1796         if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
1797                 switch (ctrl->bRequest) {
1798                 case USB_REQ_SET_ADDRESS:
1799                         stall = usb3_std_req_set_address(usb3, ctrl);
1800                         ret = true;
1801                         break;
1802                 case USB_REQ_GET_STATUS:
1803                         stall = usb3_std_req_get_status(usb3, ctrl);
1804                         ret = true;
1805                         break;
1806                 case USB_REQ_CLEAR_FEATURE:
1807                         stall = usb3_std_req_feature(usb3, ctrl, false);
1808                         ret = true;
1809                         break;
1810                 case USB_REQ_SET_FEATURE:
1811                         stall = usb3_std_req_feature(usb3, ctrl, true);
1812                         ret = true;
1813                         break;
1814                 case USB_REQ_SET_SEL:
1815                         stall = usb3_std_req_set_sel(usb3, ctrl);
1816                         ret = true;
1817                         break;
1818                 case USB_REQ_SET_ISOCH_DELAY:
1819                         /* This hardware doesn't support Isochronous xfer */
1820                         stall = true;
1821                         ret = true;
1822                         break;
1823                 case USB_REQ_SET_CONFIGURATION:
1824                         usb3_std_req_set_configuration(usb3, ctrl);
1825                         break;
1826                 default:
1827                         break;
1828                 }
1829         }
1830
1831         if (stall)
1832                 usb3_set_p0_con_stall(usb3);
1833
1834         return ret;
1835 }
1836
1837 static int usb3_p0_con_clear_buffer(struct renesas_usb3 *usb3)
1838 {
1839         usb3_set_bit(usb3, P0_CON_BCLR, USB3_P0_CON);
1840
1841         return usb3_wait(usb3, USB3_P0_CON, P0_CON_BCLR, 0);
1842 }
1843
1844 static void usb3_irq_epc_pipe0_setup(struct renesas_usb3 *usb3)
1845 {
1846         struct usb_ctrlrequest ctrl;
1847         struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
1848
1849         /* Call giveback function if previous transfer is not completed */
1850         if (usb3_ep->started)
1851                 usb3_request_done(usb3_ep, usb3_get_request(usb3_ep),
1852                                   -ECONNRESET);
1853
1854         usb3_p0_con_clear_buffer(usb3);
1855         usb3_get_setup_data(usb3, &ctrl);
1856         if (!usb3_handle_standard_request(usb3, &ctrl))
1857                 if (usb3->driver->setup(&usb3->gadget, &ctrl) < 0)
1858                         usb3_set_p0_con_stall(usb3);
1859 }
1860
1861 static void usb3_irq_epc_pipe0_bfrdy(struct renesas_usb3 *usb3)
1862 {
1863         struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
1864         struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
1865
1866         if (!usb3_req)
1867                 return;
1868
1869         usb3_p0_xfer(usb3_ep, usb3_req);
1870 }
1871
1872 static void usb3_irq_epc_pipe0(struct renesas_usb3 *usb3)
1873 {
1874         u32 p0_int_sta = usb3_read(usb3, USB3_P0_INT_STA);
1875
1876         p0_int_sta &= usb3_read(usb3, USB3_P0_INT_ENA);
1877         usb3_write(usb3, p0_int_sta, USB3_P0_INT_STA);
1878         if (p0_int_sta & P0_INT_STSED)
1879                 usb3_irq_epc_pipe0_status_end(usb3);
1880         if (p0_int_sta & P0_INT_SETUP)
1881                 usb3_irq_epc_pipe0_setup(usb3);
1882         if (p0_int_sta & P0_INT_BFRDY)
1883                 usb3_irq_epc_pipe0_bfrdy(usb3);
1884 }
1885
1886 static void usb3_request_done_pipen(struct renesas_usb3 *usb3,
1887                                     struct renesas_usb3_ep *usb3_ep,
1888                                     struct renesas_usb3_request *usb3_req,
1889                                     int status)
1890 {
1891         unsigned long flags;
1892
1893         spin_lock_irqsave(&usb3->lock, flags);
1894         if (usb3_pn_change(usb3, usb3_ep->num))
1895                 usb3_pn_stop(usb3);
1896         spin_unlock_irqrestore(&usb3->lock, flags);
1897
1898         usb3_disable_pipe_irq(usb3, usb3_ep->num);
1899         usb3_request_done(usb3_ep, usb3_req, status);
1900
1901         /* get next usb3_req */
1902         usb3_req = usb3_get_request(usb3_ep);
1903         if (usb3_req)
1904                 usb3_start_pipen(usb3_ep, usb3_req);
1905 }
1906
1907 static void usb3_irq_epc_pipen_lsttr(struct renesas_usb3 *usb3, int num)
1908 {
1909         struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, num);
1910         struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
1911
1912         if (!usb3_req)
1913                 return;
1914
1915         if (usb3_ep->dir_in) {
1916                 dev_dbg(usb3_to_dev(usb3), "%s: len = %u, actual = %u\n",
1917                         __func__, usb3_req->req.length, usb3_req->req.actual);
1918                 usb3_request_done_pipen(usb3, usb3_ep, usb3_req, 0);
1919         }
1920 }
1921
1922 static void usb3_irq_epc_pipen_bfrdy(struct renesas_usb3 *usb3, int num)
1923 {
1924         struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, num);
1925         struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
1926         bool done = false;
1927
1928         if (!usb3_req)
1929                 return;
1930
1931         spin_lock(&usb3->lock);
1932         if (usb3_pn_change(usb3, num))
1933                 goto out;
1934
1935         if (usb3_ep->dir_in) {
1936                 /* Do not stop the IN pipe here to detect LSTTR interrupt */
1937                 if (!usb3_write_pipe(usb3_ep, usb3_req, USB3_PN_WRITE))
1938                         usb3_clear_bit(usb3, PN_INT_BFRDY, USB3_PN_INT_ENA);
1939         } else {
1940                 if (!usb3_read_pipe(usb3_ep, usb3_req, USB3_PN_READ))
1941                         done = true;
1942         }
1943
1944 out:
1945         /* need to unlock because usb3_request_done_pipen() locks it */
1946         spin_unlock(&usb3->lock);
1947
1948         if (done)
1949                 usb3_request_done_pipen(usb3, usb3_ep, usb3_req, 0);
1950 }
1951
1952 static void usb3_irq_epc_pipen(struct renesas_usb3 *usb3, int num)
1953 {
1954         u32 pn_int_sta;
1955
1956         spin_lock(&usb3->lock);
1957         if (usb3_pn_change(usb3, num) < 0) {
1958                 spin_unlock(&usb3->lock);
1959                 return;
1960         }
1961
1962         pn_int_sta = usb3_read(usb3, USB3_PN_INT_STA);
1963         pn_int_sta &= usb3_read(usb3, USB3_PN_INT_ENA);
1964         usb3_write(usb3, pn_int_sta, USB3_PN_INT_STA);
1965         spin_unlock(&usb3->lock);
1966         if (pn_int_sta & PN_INT_LSTTR)
1967                 usb3_irq_epc_pipen_lsttr(usb3, num);
1968         if (pn_int_sta & PN_INT_BFRDY)
1969                 usb3_irq_epc_pipen_bfrdy(usb3, num);
1970 }
1971
1972 static void usb3_irq_epc_int_2(struct renesas_usb3 *usb3, u32 int_sta_2)
1973 {
1974         int i;
1975
1976         for (i = 0; i < usb3->num_usb3_eps; i++) {
1977                 if (int_sta_2 & USB_INT_2_PIPE(i)) {
1978                         if (!i)
1979                                 usb3_irq_epc_pipe0(usb3);
1980                         else
1981                                 usb3_irq_epc_pipen(usb3, i);
1982                 }
1983         }
1984 }
1985
1986 static void usb3_irq_idmon_change(struct renesas_usb3 *usb3)
1987 {
1988         usb3_check_id(usb3);
1989 }
1990
1991 static void usb3_irq_otg_int(struct renesas_usb3 *usb3, u32 otg_int_sta)
1992 {
1993         if (otg_int_sta & USB_OTG_IDMON)
1994                 usb3_irq_idmon_change(usb3);
1995 }
1996
1997 static void usb3_irq_epc(struct renesas_usb3 *usb3)
1998 {
1999         u32 int_sta_1 = usb3_read(usb3, USB3_USB_INT_STA_1);
2000         u32 int_sta_2 = usb3_read(usb3, USB3_USB_INT_STA_2);
2001         u32 otg_int_sta = usb3_read(usb3, USB3_USB_OTG_INT_STA);
2002
2003         int_sta_1 &= usb3_read(usb3, USB3_USB_INT_ENA_1);
2004         if (int_sta_1) {
2005                 usb3_write(usb3, int_sta_1, USB3_USB_INT_STA_1);
2006                 usb3_irq_epc_int_1(usb3, int_sta_1);
2007         }
2008
2009         int_sta_2 &= usb3_read(usb3, USB3_USB_INT_ENA_2);
2010         if (int_sta_2)
2011                 usb3_irq_epc_int_2(usb3, int_sta_2);
2012
2013         otg_int_sta &= usb3_read(usb3, USB3_USB_OTG_INT_ENA);
2014         if (otg_int_sta) {
2015                 usb3_write(usb3, otg_int_sta, USB3_USB_OTG_INT_STA);
2016                 usb3_irq_otg_int(usb3, otg_int_sta);
2017         }
2018 }
2019
2020 static void usb3_irq_dma_int(struct renesas_usb3 *usb3, u32 dma_sta)
2021 {
2022         struct renesas_usb3_ep *usb3_ep;
2023         struct renesas_usb3_request *usb3_req;
2024         int i, status;
2025
2026         for (i = 0; i < usb3->num_usb3_eps; i++) {
2027                 if (!(dma_sta & DMA_INT(i)))
2028                         continue;
2029
2030                 usb3_ep = usb3_get_ep(usb3, i);
2031                 if (!(usb3_read(usb3, USB3_AXI_INT_STA) &
2032                     AXI_INT_PRDEN_CLR_STA(usb3_ep->dma->num)))
2033                         continue;
2034
2035                 usb3_req = usb3_get_request(usb3_ep);
2036                 status = usb3_dma_try_stop(usb3_ep, usb3_req);
2037                 usb3_request_done_pipen(usb3, usb3_ep, usb3_req, status);
2038         }
2039 }
2040
2041 static void usb3_irq_dma(struct renesas_usb3 *usb3)
2042 {
2043         u32 dma_sta = usb3_read(usb3, USB3_DMA_INT_STA);
2044
2045         dma_sta &= usb3_read(usb3, USB3_DMA_INT_ENA);
2046         if (dma_sta) {
2047                 usb3_write(usb3, dma_sta, USB3_DMA_INT_STA);
2048                 usb3_irq_dma_int(usb3, dma_sta);
2049         }
2050 }
2051
2052 static irqreturn_t renesas_usb3_irq(int irq, void *_usb3)
2053 {
2054         struct renesas_usb3 *usb3 = _usb3;
2055         irqreturn_t ret = IRQ_NONE;
2056         u32 axi_int_sta = usb3_read(usb3, USB3_AXI_INT_STA);
2057
2058         if (axi_int_sta & AXI_INT_DMAINT) {
2059                 usb3_irq_dma(usb3);
2060                 ret = IRQ_HANDLED;
2061         }
2062
2063         if (axi_int_sta & AXI_INT_EPCINT) {
2064                 usb3_irq_epc(usb3);
2065                 ret = IRQ_HANDLED;
2066         }
2067
2068         return ret;
2069 }
2070
2071 static void usb3_write_pn_mod(struct renesas_usb3_ep *usb3_ep,
2072                               const struct usb_endpoint_descriptor *desc)
2073 {
2074         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
2075         u32 val = 0;
2076
2077         val |= usb3_ep->dir_in ? PN_MOD_DIR : 0;
2078         val |= PN_MOD_TYPE(usb_endpoint_type(desc));
2079         val |= PN_MOD_EPNUM(usb_endpoint_num(desc));
2080         usb3_write(usb3, val, USB3_PN_MOD);
2081 }
2082
2083 static u32 usb3_calc_ramarea(int ram_size)
2084 {
2085         WARN_ON(ram_size > SZ_16K);
2086
2087         if (ram_size <= SZ_1K)
2088                 return PN_RAMMAP_RAMAREA_1KB;
2089         else if (ram_size <= SZ_2K)
2090                 return PN_RAMMAP_RAMAREA_2KB;
2091         else if (ram_size <= SZ_4K)
2092                 return PN_RAMMAP_RAMAREA_4KB;
2093         else if (ram_size <= SZ_8K)
2094                 return PN_RAMMAP_RAMAREA_8KB;
2095         else
2096                 return PN_RAMMAP_RAMAREA_16KB;
2097 }
2098
2099 static u32 usb3_calc_rammap_val(struct renesas_usb3_ep *usb3_ep,
2100                                 const struct usb_endpoint_descriptor *desc)
2101 {
2102         int i;
2103         static const u32 max_packet_array[] = {8, 16, 32, 64, 512};
2104         u32 mpkt = PN_RAMMAP_MPKT(1024);
2105
2106         for (i = 0; i < ARRAY_SIZE(max_packet_array); i++) {
2107                 if (usb_endpoint_maxp(desc) <= max_packet_array[i])
2108                         mpkt = PN_RAMMAP_MPKT(max_packet_array[i]);
2109         }
2110
2111         return usb3_ep->rammap_val | mpkt;
2112 }
2113
2114 static int usb3_enable_pipe_n(struct renesas_usb3_ep *usb3_ep,
2115                               const struct usb_endpoint_descriptor *desc)
2116 {
2117         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
2118         unsigned long flags;
2119
2120         usb3_ep->dir_in = usb_endpoint_dir_in(desc);
2121
2122         spin_lock_irqsave(&usb3->lock, flags);
2123         if (!usb3_pn_change(usb3, usb3_ep->num)) {
2124                 usb3_write_pn_mod(usb3_ep, desc);
2125                 usb3_write(usb3, usb3_calc_rammap_val(usb3_ep, desc),
2126                            USB3_PN_RAMMAP);
2127                 usb3_pn_con_clear(usb3);
2128                 usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON);
2129         }
2130         spin_unlock_irqrestore(&usb3->lock, flags);
2131
2132         return 0;
2133 }
2134
2135 static int usb3_disable_pipe_n(struct renesas_usb3_ep *usb3_ep)
2136 {
2137         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
2138         unsigned long flags;
2139
2140         usb3_ep->halt = false;
2141
2142         spin_lock_irqsave(&usb3->lock, flags);
2143         if (!usb3_pn_change(usb3, usb3_ep->num)) {
2144                 usb3_write(usb3, 0, USB3_PN_INT_ENA);
2145                 usb3_write(usb3, 0, USB3_PN_RAMMAP);
2146                 usb3_clear_bit(usb3, PN_CON_EN, USB3_PN_CON);
2147         }
2148         spin_unlock_irqrestore(&usb3->lock, flags);
2149
2150         return 0;
2151 }
2152
2153 /*------- usb_ep_ops -----------------------------------------------------*/
2154 static int renesas_usb3_ep_enable(struct usb_ep *_ep,
2155                                   const struct usb_endpoint_descriptor *desc)
2156 {
2157         struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
2158
2159         return usb3_enable_pipe_n(usb3_ep, desc);
2160 }
2161
2162 static int renesas_usb3_ep_disable(struct usb_ep *_ep)
2163 {
2164         struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
2165         struct renesas_usb3_request *usb3_req;
2166
2167         do {
2168                 usb3_req = usb3_get_request(usb3_ep);
2169                 if (!usb3_req)
2170                         break;
2171                 usb3_dma_try_stop(usb3_ep, usb3_req);
2172                 usb3_request_done(usb3_ep, usb3_req, -ESHUTDOWN);
2173         } while (1);
2174
2175         return usb3_disable_pipe_n(usb3_ep);
2176 }
2177
2178 static struct usb_request *__renesas_usb3_ep_alloc_request(gfp_t gfp_flags)
2179 {
2180         struct renesas_usb3_request *usb3_req;
2181
2182         usb3_req = kzalloc(sizeof(struct renesas_usb3_request), gfp_flags);
2183         if (!usb3_req)
2184                 return NULL;
2185
2186         INIT_LIST_HEAD(&usb3_req->queue);
2187
2188         return &usb3_req->req;
2189 }
2190
2191 static void __renesas_usb3_ep_free_request(struct usb_request *_req)
2192 {
2193         struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req);
2194
2195         kfree(usb3_req);
2196 }
2197
2198 static struct usb_request *renesas_usb3_ep_alloc_request(struct usb_ep *_ep,
2199                                                          gfp_t gfp_flags)
2200 {
2201         return __renesas_usb3_ep_alloc_request(gfp_flags);
2202 }
2203
2204 static void renesas_usb3_ep_free_request(struct usb_ep *_ep,
2205                                          struct usb_request *_req)
2206 {
2207         __renesas_usb3_ep_free_request(_req);
2208 }
2209
2210 static int renesas_usb3_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
2211 {
2212         struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
2213         struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req);
2214         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
2215
2216         dev_dbg(usb3_to_dev(usb3), "ep_dequeue: ep%2d, %u\n", usb3_ep->num,
2217                 _req->length);
2218
2219         usb3_dma_try_stop(usb3_ep, usb3_req);
2220         usb3_request_done_pipen(usb3, usb3_ep, usb3_req, -ECONNRESET);
2221
2222         return 0;
2223 }
2224
2225 static int renesas_usb3_ep_set_halt(struct usb_ep *_ep, int value)
2226 {
2227         return usb3_set_halt(usb_ep_to_usb3_ep(_ep), !!value, false);
2228 }
2229
2230 static int renesas_usb3_ep_set_wedge(struct usb_ep *_ep)
2231 {
2232         struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
2233
2234         usb3_ep->wedge = true;
2235         return usb3_set_halt(usb3_ep, true, false);
2236 }
2237
2238 static void renesas_usb3_ep_fifo_flush(struct usb_ep *_ep)
2239 {
2240         struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
2241         struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
2242         unsigned long flags;
2243
2244         if (usb3_ep->num) {
2245                 spin_lock_irqsave(&usb3->lock, flags);
2246                 if (!usb3_pn_change(usb3, usb3_ep->num)) {
2247                         usb3_pn_con_clear(usb3);
2248                         usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON);
2249                 }
2250                 spin_unlock_irqrestore(&usb3->lock, flags);
2251         } else {
2252                 usb3_p0_con_clear_buffer(usb3);
2253         }
2254 }
2255
2256 static const struct usb_ep_ops renesas_usb3_ep_ops = {
2257         .enable         = renesas_usb3_ep_enable,
2258         .disable        = renesas_usb3_ep_disable,
2259
2260         .alloc_request  = renesas_usb3_ep_alloc_request,
2261         .free_request   = renesas_usb3_ep_free_request,
2262
2263         .queue          = renesas_usb3_ep_queue,
2264         .dequeue        = renesas_usb3_ep_dequeue,
2265
2266         .set_halt       = renesas_usb3_ep_set_halt,
2267         .set_wedge      = renesas_usb3_ep_set_wedge,
2268         .fifo_flush     = renesas_usb3_ep_fifo_flush,
2269 };
2270
2271 /*------- usb_gadget_ops -------------------------------------------------*/
2272 static int renesas_usb3_start(struct usb_gadget *gadget,
2273                               struct usb_gadget_driver *driver)
2274 {
2275         struct renesas_usb3 *usb3;
2276
2277         if (!driver || driver->max_speed < USB_SPEED_FULL ||
2278             !driver->setup)
2279                 return -EINVAL;
2280
2281         usb3 = gadget_to_renesas_usb3(gadget);
2282
2283         /* hook up the driver */
2284         usb3->driver = driver;
2285
2286         if (usb3->phy)
2287                 phy_init(usb3->phy);
2288
2289         pm_runtime_get_sync(usb3_to_dev(usb3));
2290
2291         renesas_usb3_init_controller(usb3);
2292
2293         return 0;
2294 }
2295
2296 static int renesas_usb3_stop(struct usb_gadget *gadget)
2297 {
2298         struct renesas_usb3 *usb3 = gadget_to_renesas_usb3(gadget);
2299
2300         usb3->softconnect = false;
2301         usb3->gadget.speed = USB_SPEED_UNKNOWN;
2302         usb3->driver = NULL;
2303         renesas_usb3_stop_controller(usb3);
2304
2305         if (usb3->phy)
2306                 phy_exit(usb3->phy);
2307
2308         pm_runtime_put(usb3_to_dev(usb3));
2309
2310         return 0;
2311 }
2312
2313 static int renesas_usb3_get_frame(struct usb_gadget *_gadget)
2314 {
2315         return -EOPNOTSUPP;
2316 }
2317
2318 static int renesas_usb3_pullup(struct usb_gadget *gadget, int is_on)
2319 {
2320         struct renesas_usb3 *usb3 = gadget_to_renesas_usb3(gadget);
2321
2322         usb3->softconnect = !!is_on;
2323
2324         return 0;
2325 }
2326
2327 static int renesas_usb3_set_selfpowered(struct usb_gadget *gadget, int is_self)
2328 {
2329         gadget->is_selfpowered = !!is_self;
2330
2331         return 0;
2332 }
2333
2334 static const struct usb_gadget_ops renesas_usb3_gadget_ops = {
2335         .get_frame              = renesas_usb3_get_frame,
2336         .udc_start              = renesas_usb3_start,
2337         .udc_stop               = renesas_usb3_stop,
2338         .pullup                 = renesas_usb3_pullup,
2339         .set_selfpowered        = renesas_usb3_set_selfpowered,
2340 };
2341
2342 static enum usb_role renesas_usb3_role_switch_get(struct device *dev)
2343 {
2344         struct renesas_usb3 *usb3 = dev_get_drvdata(dev);
2345         enum usb_role cur_role;
2346
2347         pm_runtime_get_sync(dev);
2348         cur_role = usb3_is_host(usb3) ? USB_ROLE_HOST : USB_ROLE_DEVICE;
2349         pm_runtime_put(dev);
2350
2351         return cur_role;
2352 }
2353
2354 static void handle_ext_role_switch_states(struct device *dev,
2355                                             enum usb_role role)
2356 {
2357         struct renesas_usb3 *usb3 = dev_get_drvdata(dev);
2358         struct device *host = usb3->host_dev;
2359         enum usb_role cur_role = renesas_usb3_role_switch_get(dev);
2360
2361         switch (role) {
2362         case USB_ROLE_NONE:
2363                 usb3->connection_state = USB_ROLE_NONE;
2364                 if (usb3->driver)
2365                         usb3_disconnect(usb3);
2366                 usb3_vbus_out(usb3, false);
2367                 break;
2368         case USB_ROLE_DEVICE:
2369                 if (usb3->connection_state == USB_ROLE_NONE) {
2370                         usb3->connection_state = USB_ROLE_DEVICE;
2371                         usb3_set_mode(usb3, false);
2372                         if (usb3->driver)
2373                                 usb3_connect(usb3);
2374                 } else if (cur_role == USB_ROLE_HOST)  {
2375                         device_release_driver(host);
2376                         usb3_set_mode(usb3, false);
2377                         if (usb3->driver)
2378                                 usb3_connect(usb3);
2379                 }
2380                 usb3_vbus_out(usb3, false);
2381                 break;
2382         case USB_ROLE_HOST:
2383                 if (usb3->connection_state == USB_ROLE_NONE) {
2384                         if (usb3->driver)
2385                                 usb3_disconnect(usb3);
2386
2387                         usb3->connection_state = USB_ROLE_HOST;
2388                         usb3_set_mode(usb3, true);
2389                         usb3_vbus_out(usb3, true);
2390                         if (device_attach(host) < 0)
2391                                 dev_err(dev, "device_attach(host) failed\n");
2392                 } else if (cur_role == USB_ROLE_DEVICE) {
2393                         usb3_disconnect(usb3);
2394                         /* Must set the mode before device_attach of the host */
2395                         usb3_set_mode(usb3, true);
2396                         /* This device_attach() might sleep */
2397                         if (device_attach(host) < 0)
2398                                 dev_err(dev, "device_attach(host) failed\n");
2399                 }
2400                 break;
2401         default:
2402                 break;
2403         }
2404 }
2405
2406 static void handle_role_switch_states(struct device *dev,
2407                                             enum usb_role role)
2408 {
2409         struct renesas_usb3 *usb3 = dev_get_drvdata(dev);
2410         struct device *host = usb3->host_dev;
2411         enum usb_role cur_role = renesas_usb3_role_switch_get(dev);
2412
2413         if (cur_role == USB_ROLE_HOST && role == USB_ROLE_DEVICE) {
2414                 device_release_driver(host);
2415                 usb3_set_mode(usb3, false);
2416         } else if (cur_role == USB_ROLE_DEVICE && role == USB_ROLE_HOST) {
2417                 /* Must set the mode before device_attach of the host */
2418                 usb3_set_mode(usb3, true);
2419                 /* This device_attach() might sleep */
2420                 if (device_attach(host) < 0)
2421                         dev_err(dev, "device_attach(host) failed\n");
2422         }
2423 }
2424
2425 static int renesas_usb3_role_switch_set(struct device *dev,
2426                                         enum usb_role role)
2427 {
2428         struct renesas_usb3 *usb3 = dev_get_drvdata(dev);
2429
2430         pm_runtime_get_sync(dev);
2431
2432         if (usb3->role_sw_by_connector)
2433                 handle_ext_role_switch_states(dev, role);
2434         else
2435                 handle_role_switch_states(dev, role);
2436
2437         pm_runtime_put(dev);
2438
2439         return 0;
2440 }
2441
2442 static ssize_t role_store(struct device *dev, struct device_attribute *attr,
2443                           const char *buf, size_t count)
2444 {
2445         struct renesas_usb3 *usb3 = dev_get_drvdata(dev);
2446         bool new_mode_is_host;
2447
2448         if (!usb3->driver)
2449                 return -ENODEV;
2450
2451         if (usb3->forced_b_device)
2452                 return -EBUSY;
2453
2454         if (sysfs_streq(buf, "host"))
2455                 new_mode_is_host = true;
2456         else if (sysfs_streq(buf, "peripheral"))
2457                 new_mode_is_host = false;
2458         else
2459                 return -EINVAL;
2460
2461         if (new_mode_is_host == usb3_is_host(usb3))
2462                 return -EINVAL;
2463
2464         usb3_mode_config(usb3, new_mode_is_host, usb3_is_a_device(usb3));
2465
2466         return count;
2467 }
2468
2469 static ssize_t role_show(struct device *dev, struct device_attribute *attr,
2470                          char *buf)
2471 {
2472         struct renesas_usb3 *usb3 = dev_get_drvdata(dev);
2473
2474         if (!usb3->driver)
2475                 return -ENODEV;
2476
2477         return sprintf(buf, "%s\n", usb3_is_host(usb3) ? "host" : "peripheral");
2478 }
2479 static DEVICE_ATTR_RW(role);
2480
2481 static int renesas_usb3_b_device_show(struct seq_file *s, void *unused)
2482 {
2483         struct renesas_usb3 *usb3 = s->private;
2484
2485         seq_printf(s, "%d\n", usb3->forced_b_device);
2486
2487         return 0;
2488 }
2489
2490 static int renesas_usb3_b_device_open(struct inode *inode, struct file *file)
2491 {
2492         return single_open(file, renesas_usb3_b_device_show, inode->i_private);
2493 }
2494
2495 static ssize_t renesas_usb3_b_device_write(struct file *file,
2496                                            const char __user *ubuf,
2497                                            size_t count, loff_t *ppos)
2498 {
2499         struct seq_file *s = file->private_data;
2500         struct renesas_usb3 *usb3 = s->private;
2501         char buf[32];
2502
2503         if (!usb3->driver)
2504                 return -ENODEV;
2505
2506         if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
2507                 return -EFAULT;
2508
2509         usb3->start_to_connect = false;
2510         if (usb3->workaround_for_vbus && usb3->forced_b_device &&
2511             !strncmp(buf, "2", 1))
2512                 usb3->start_to_connect = true;
2513         else if (!strncmp(buf, "1", 1))
2514                 usb3->forced_b_device = true;
2515         else
2516                 usb3->forced_b_device = false;
2517
2518         if (usb3->workaround_for_vbus)
2519                 usb3_disconnect(usb3);
2520
2521         /* Let this driver call usb3_connect() if needed */
2522         usb3_check_id(usb3);
2523
2524         return count;
2525 }
2526
2527 static const struct file_operations renesas_usb3_b_device_fops = {
2528         .open = renesas_usb3_b_device_open,
2529         .write = renesas_usb3_b_device_write,
2530         .read = seq_read,
2531         .llseek = seq_lseek,
2532         .release = single_release,
2533 };
2534
2535 static void renesas_usb3_debugfs_init(struct renesas_usb3 *usb3,
2536                                       struct device *dev)
2537 {
2538         usb3->dentry = debugfs_create_dir(dev_name(dev), NULL);
2539
2540         debugfs_create_file("b_device", 0644, usb3->dentry, usb3,
2541                             &renesas_usb3_b_device_fops);
2542 }
2543
2544 /*------- platform_driver ------------------------------------------------*/
2545 static int renesas_usb3_remove(struct platform_device *pdev)
2546 {
2547         struct renesas_usb3 *usb3 = platform_get_drvdata(pdev);
2548
2549         debugfs_remove_recursive(usb3->dentry);
2550         device_remove_file(&pdev->dev, &dev_attr_role);
2551
2552         usb_role_switch_unregister(usb3->role_sw);
2553
2554         usb_del_gadget_udc(&usb3->gadget);
2555         renesas_usb3_dma_free_prd(usb3, &pdev->dev);
2556
2557         __renesas_usb3_ep_free_request(usb3->ep0_req);
2558         pm_runtime_disable(&pdev->dev);
2559
2560         return 0;
2561 }
2562
2563 static int renesas_usb3_init_ep(struct renesas_usb3 *usb3, struct device *dev,
2564                                 const struct renesas_usb3_priv *priv)
2565 {
2566         struct renesas_usb3_ep *usb3_ep;
2567         int i;
2568
2569         /* calculate num_usb3_eps from renesas_usb3_priv */
2570         usb3->num_usb3_eps = priv->ramsize_per_ramif * priv->num_ramif * 2 /
2571                              priv->ramsize_per_pipe + 1;
2572
2573         if (usb3->num_usb3_eps > USB3_MAX_NUM_PIPES)
2574                 usb3->num_usb3_eps = USB3_MAX_NUM_PIPES;
2575
2576         usb3->usb3_ep = devm_kcalloc(dev,
2577                                      usb3->num_usb3_eps, sizeof(*usb3_ep),
2578                                      GFP_KERNEL);
2579         if (!usb3->usb3_ep)
2580                 return -ENOMEM;
2581
2582         dev_dbg(dev, "%s: num_usb3_eps = %d\n", __func__, usb3->num_usb3_eps);
2583         /*
2584          * This driver prepares pipes as follows:
2585          *  - odd pipes = IN pipe
2586          *  - even pipes = OUT pipe (except pipe 0)
2587          */
2588         usb3_for_each_ep(usb3_ep, usb3, i) {
2589                 snprintf(usb3_ep->ep_name, sizeof(usb3_ep->ep_name), "ep%d", i);
2590                 usb3_ep->usb3 = usb3;
2591                 usb3_ep->num = i;
2592                 usb3_ep->ep.name = usb3_ep->ep_name;
2593                 usb3_ep->ep.ops = &renesas_usb3_ep_ops;
2594                 INIT_LIST_HEAD(&usb3_ep->queue);
2595                 INIT_LIST_HEAD(&usb3_ep->ep.ep_list);
2596                 if (!i) {
2597                         /* for control pipe */
2598                         usb3->gadget.ep0 = &usb3_ep->ep;
2599                         usb_ep_set_maxpacket_limit(&usb3_ep->ep,
2600                                                 USB3_EP0_SS_MAX_PACKET_SIZE);
2601                         usb3_ep->ep.caps.type_control = true;
2602                         usb3_ep->ep.caps.dir_in = true;
2603                         usb3_ep->ep.caps.dir_out = true;
2604                         continue;
2605                 }
2606
2607                 /* for bulk or interrupt pipe */
2608                 usb_ep_set_maxpacket_limit(&usb3_ep->ep, ~0);
2609                 list_add_tail(&usb3_ep->ep.ep_list, &usb3->gadget.ep_list);
2610                 usb3_ep->ep.caps.type_bulk = true;
2611                 usb3_ep->ep.caps.type_int = true;
2612                 if (i & 1)
2613                         usb3_ep->ep.caps.dir_in = true;
2614                 else
2615                         usb3_ep->ep.caps.dir_out = true;
2616         }
2617
2618         return 0;
2619 }
2620
2621 static void renesas_usb3_init_ram(struct renesas_usb3 *usb3, struct device *dev,
2622                                   const struct renesas_usb3_priv *priv)
2623 {
2624         struct renesas_usb3_ep *usb3_ep;
2625         int i;
2626         u32 ramif[2], basead[2];        /* index 0 = for IN pipes */
2627         u32 *cur_ramif, *cur_basead;
2628         u32 val;
2629
2630         memset(ramif, 0, sizeof(ramif));
2631         memset(basead, 0, sizeof(basead));
2632
2633         /*
2634          * This driver prepares pipes as follows:
2635          *  - all pipes = the same size as "ramsize_per_pipe"
2636          * Please refer to the "Method of Specifying RAM Mapping"
2637          */
2638         usb3_for_each_ep(usb3_ep, usb3, i) {
2639                 if (!i)
2640                         continue;       /* out of scope if ep num = 0 */
2641                 if (usb3_ep->ep.caps.dir_in) {
2642                         cur_ramif = &ramif[0];
2643                         cur_basead = &basead[0];
2644                 } else {
2645                         cur_ramif = &ramif[1];
2646                         cur_basead = &basead[1];
2647                 }
2648
2649                 if (*cur_basead > priv->ramsize_per_ramif)
2650                         continue;       /* out of memory for IN or OUT pipe */
2651
2652                 /* calculate rammap_val */
2653                 val = PN_RAMMAP_RAMIF(*cur_ramif);
2654                 val |= usb3_calc_ramarea(priv->ramsize_per_pipe);
2655                 val |= PN_RAMMAP_BASEAD(*cur_basead);
2656                 usb3_ep->rammap_val = val;
2657
2658                 dev_dbg(dev, "ep%2d: val = %08x, ramif = %d, base = %x\n",
2659                         i, val, *cur_ramif, *cur_basead);
2660
2661                 /* update current ramif */
2662                 if (*cur_ramif + 1 == priv->num_ramif) {
2663                         *cur_ramif = 0;
2664                         *cur_basead += priv->ramsize_per_pipe;
2665                 } else {
2666                         (*cur_ramif)++;
2667                 }
2668         }
2669 }
2670
2671 static const struct renesas_usb3_priv renesas_usb3_priv_r8a7795_es1 = {
2672         .ramsize_per_ramif = SZ_16K,
2673         .num_ramif = 2,
2674         .ramsize_per_pipe = SZ_4K,
2675         .workaround_for_vbus = true,
2676 };
2677
2678 static const struct renesas_usb3_priv renesas_usb3_priv_gen3 = {
2679         .ramsize_per_ramif = SZ_16K,
2680         .num_ramif = 4,
2681         .ramsize_per_pipe = SZ_4K,
2682 };
2683
2684 static const struct renesas_usb3_priv renesas_usb3_priv_r8a77990 = {
2685         .ramsize_per_ramif = SZ_16K,
2686         .num_ramif = 4,
2687         .ramsize_per_pipe = SZ_4K,
2688         .workaround_for_vbus = true,
2689 };
2690
2691 static const struct of_device_id usb3_of_match[] = {
2692         {
2693                 .compatible = "renesas,r8a7795-usb3-peri",
2694                 .data = &renesas_usb3_priv_gen3,
2695         },
2696         {
2697                 .compatible = "renesas,rcar-gen3-usb3-peri",
2698                 .data = &renesas_usb3_priv_gen3,
2699         },
2700         { },
2701 };
2702 MODULE_DEVICE_TABLE(of, usb3_of_match);
2703
2704 static const struct soc_device_attribute renesas_usb3_quirks_match[] = {
2705         {
2706                 .soc_id = "r8a774c0",
2707                 .data = &renesas_usb3_priv_r8a77990,
2708         },
2709         {
2710                 .soc_id = "r8a7795", .revision = "ES1.*",
2711                 .data = &renesas_usb3_priv_r8a7795_es1,
2712         },
2713         {
2714                 .soc_id = "r8a77990",
2715                 .data = &renesas_usb3_priv_r8a77990,
2716         },
2717         { /* sentinel */ },
2718 };
2719
2720 static const unsigned int renesas_usb3_cable[] = {
2721         EXTCON_USB,
2722         EXTCON_USB_HOST,
2723         EXTCON_NONE,
2724 };
2725
2726 static struct usb_role_switch_desc renesas_usb3_role_switch_desc = {
2727         .set = renesas_usb3_role_switch_set,
2728         .get = renesas_usb3_role_switch_get,
2729         .allow_userspace_control = true,
2730 };
2731
2732 static int renesas_usb3_probe(struct platform_device *pdev)
2733 {
2734         struct renesas_usb3 *usb3;
2735         struct resource *res;
2736         int irq, ret;
2737         const struct renesas_usb3_priv *priv;
2738         const struct soc_device_attribute *attr;
2739
2740         attr = soc_device_match(renesas_usb3_quirks_match);
2741         if (attr)
2742                 priv = attr->data;
2743         else
2744                 priv = of_device_get_match_data(&pdev->dev);
2745
2746         irq = platform_get_irq(pdev, 0);
2747         if (irq < 0) {
2748                 dev_err(&pdev->dev, "Failed to get IRQ: %d\n", irq);
2749                 return irq;
2750         }
2751
2752         usb3 = devm_kzalloc(&pdev->dev, sizeof(*usb3), GFP_KERNEL);
2753         if (!usb3)
2754                 return -ENOMEM;
2755
2756         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2757         usb3->reg = devm_ioremap_resource(&pdev->dev, res);
2758         if (IS_ERR(usb3->reg))
2759                 return PTR_ERR(usb3->reg);
2760
2761         platform_set_drvdata(pdev, usb3);
2762         spin_lock_init(&usb3->lock);
2763
2764         usb3->gadget.ops = &renesas_usb3_gadget_ops;
2765         usb3->gadget.name = udc_name;
2766         usb3->gadget.max_speed = USB_SPEED_SUPER;
2767         INIT_LIST_HEAD(&usb3->gadget.ep_list);
2768         ret = renesas_usb3_init_ep(usb3, &pdev->dev, priv);
2769         if (ret < 0)
2770                 return ret;
2771         renesas_usb3_init_ram(usb3, &pdev->dev, priv);
2772
2773         ret = devm_request_irq(&pdev->dev, irq, renesas_usb3_irq, 0,
2774                                dev_name(&pdev->dev), usb3);
2775         if (ret < 0)
2776                 return ret;
2777
2778         INIT_WORK(&usb3->extcon_work, renesas_usb3_extcon_work);
2779         usb3->extcon = devm_extcon_dev_allocate(&pdev->dev, renesas_usb3_cable);
2780         if (IS_ERR(usb3->extcon))
2781                 return PTR_ERR(usb3->extcon);
2782
2783         ret = devm_extcon_dev_register(&pdev->dev, usb3->extcon);
2784         if (ret < 0) {
2785                 dev_err(&pdev->dev, "Failed to register extcon\n");
2786                 return ret;
2787         }
2788
2789         /* for ep0 handling */
2790         usb3->ep0_req = __renesas_usb3_ep_alloc_request(GFP_KERNEL);
2791         if (!usb3->ep0_req)
2792                 return -ENOMEM;
2793
2794         ret = renesas_usb3_dma_alloc_prd(usb3, &pdev->dev);
2795         if (ret < 0)
2796                 goto err_alloc_prd;
2797
2798         /*
2799          * This is optional. So, if this driver cannot get a phy,
2800          * this driver will not handle a phy anymore.
2801          */
2802         usb3->phy = devm_phy_optional_get(&pdev->dev, "usb");
2803         if (IS_ERR(usb3->phy)) {
2804                 ret = PTR_ERR(usb3->phy);
2805                 goto err_add_udc;
2806         }
2807
2808         pm_runtime_enable(&pdev->dev);
2809         ret = usb_add_gadget_udc(&pdev->dev, &usb3->gadget);
2810         if (ret < 0)
2811                 goto err_add_udc;
2812
2813         ret = device_create_file(&pdev->dev, &dev_attr_role);
2814         if (ret < 0)
2815                 goto err_dev_create;
2816
2817         if (device_property_read_bool(&pdev->dev, "usb-role-switch")) {
2818                 usb3->role_sw_by_connector = true;
2819                 renesas_usb3_role_switch_desc.fwnode = dev_fwnode(&pdev->dev);
2820         }
2821
2822         INIT_WORK(&usb3->role_work, renesas_usb3_role_work);
2823         usb3->role_sw = usb_role_switch_register(&pdev->dev,
2824                                         &renesas_usb3_role_switch_desc);
2825         if (!IS_ERR(usb3->role_sw)) {
2826                 usb3->host_dev = usb_of_get_companion_dev(&pdev->dev);
2827                 if (!usb3->host_dev) {
2828                         /* If not found, this driver will not use a role sw */
2829                         usb_role_switch_unregister(usb3->role_sw);
2830                         usb3->role_sw = NULL;
2831                 }
2832         } else {
2833                 usb3->role_sw = NULL;
2834         }
2835
2836         usb3->workaround_for_vbus = priv->workaround_for_vbus;
2837
2838         renesas_usb3_debugfs_init(usb3, &pdev->dev);
2839
2840         dev_info(&pdev->dev, "probed%s\n", usb3->phy ? " with phy" : "");
2841
2842         return 0;
2843
2844 err_dev_create:
2845         usb_del_gadget_udc(&usb3->gadget);
2846
2847 err_add_udc:
2848         renesas_usb3_dma_free_prd(usb3, &pdev->dev);
2849
2850 err_alloc_prd:
2851         __renesas_usb3_ep_free_request(usb3->ep0_req);
2852
2853         return ret;
2854 }
2855
2856 #ifdef CONFIG_PM_SLEEP
2857 static int renesas_usb3_suspend(struct device *dev)
2858 {
2859         struct renesas_usb3 *usb3 = dev_get_drvdata(dev);
2860
2861         /* Not started */
2862         if (!usb3->driver)
2863                 return 0;
2864
2865         renesas_usb3_stop_controller(usb3);
2866         if (usb3->phy)
2867                 phy_exit(usb3->phy);
2868         pm_runtime_put(dev);
2869
2870         return 0;
2871 }
2872
2873 static int renesas_usb3_resume(struct device *dev)
2874 {
2875         struct renesas_usb3 *usb3 = dev_get_drvdata(dev);
2876
2877         /* Not started */
2878         if (!usb3->driver)
2879                 return 0;
2880
2881         if (usb3->phy)
2882                 phy_init(usb3->phy);
2883         pm_runtime_get_sync(dev);
2884         renesas_usb3_init_controller(usb3);
2885
2886         return 0;
2887 }
2888 #endif
2889
2890 static SIMPLE_DEV_PM_OPS(renesas_usb3_pm_ops, renesas_usb3_suspend,
2891                         renesas_usb3_resume);
2892
2893 static struct platform_driver renesas_usb3_driver = {
2894         .probe          = renesas_usb3_probe,
2895         .remove         = renesas_usb3_remove,
2896         .driver         = {
2897                 .name = (char *)udc_name,
2898                 .pm             = &renesas_usb3_pm_ops,
2899                 .of_match_table = of_match_ptr(usb3_of_match),
2900         },
2901 };
2902 module_platform_driver(renesas_usb3_driver);
2903
2904 MODULE_DESCRIPTION("Renesas USB3.0 Peripheral driver");
2905 MODULE_LICENSE("GPL v2");
2906 MODULE_AUTHOR("Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>");
2907 MODULE_ALIAS("platform:renesas_usb3");