git.sur5r.net Git - u-boot/blob - drivers/usb/gadget/mv_udc.c

   1 /*
   2  * Copyright 2011, Marvell Semiconductor Inc.
   3  * Lei Wen <leiwen@marvell.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  *
   7  * Back ported to the 8xx platform (from the 8260 platform) by
   8  * Murray.Jensen@cmst.csiro.au, 27-Jan-01.
   9  */
  10
  11 #include <common.h>
  12 #include <command.h>
  13 #include <config.h>
  14 #include <net.h>
  15 #include <malloc.h>
  16 #include <asm/io.h>
  17 #include <linux/types.h>
  18 #include <usb/mv_udc.h>
  19
  20 #if CONFIG_USB_MAX_CONTROLLER_COUNT > 1
  21 #error This driver only supports one single controller.
  22 #endif
  23
  24 #ifndef DEBUG
  25 #define DBG(x...) do {} while (0)
  26 #else
  27 #define DBG(x...) printf(x)
  28 static const char *reqname(unsigned r)
  29 {
  30         switch (r) {
  31         case USB_REQ_GET_STATUS: return "GET_STATUS";
  32         case USB_REQ_CLEAR_FEATURE: return "CLEAR_FEATURE";
  33         case USB_REQ_SET_FEATURE: return "SET_FEATURE";
  34         case USB_REQ_SET_ADDRESS: return "SET_ADDRESS";
  35         case USB_REQ_GET_DESCRIPTOR: return "GET_DESCRIPTOR";
  36         case USB_REQ_SET_DESCRIPTOR: return "SET_DESCRIPTOR";
  37         case USB_REQ_GET_CONFIGURATION: return "GET_CONFIGURATION";
  38         case USB_REQ_SET_CONFIGURATION: return "SET_CONFIGURATION";
  39         case USB_REQ_GET_INTERFACE: return "GET_INTERFACE";
  40         case USB_REQ_SET_INTERFACE: return "SET_INTERFACE";
  41         default: return "*UNKNOWN*";
  42         }
  43 }
  44 #endif
  45
  46 #define PAGE_SIZE       4096
  47 #define QH_MAXNUM       32
  48 static struct usb_endpoint_descriptor ep0_out_desc = {
  49         .bLength = sizeof(struct usb_endpoint_descriptor),
  50         .bDescriptorType = USB_DT_ENDPOINT,
  51         .bEndpointAddress = 0,
  52         .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
  53 };
  54
  55 static struct usb_endpoint_descriptor ep0_in_desc = {
  56         .bLength = sizeof(struct usb_endpoint_descriptor),
  57         .bDescriptorType = USB_DT_ENDPOINT,
  58         .bEndpointAddress = USB_DIR_IN,
  59         .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
  60 };
  61
  62 struct ept_queue_head *epts;
  63 struct ept_queue_item *items[2 * NUM_ENDPOINTS];
  64 static int mv_pullup(struct usb_gadget *gadget, int is_on);
  65 static int mv_ep_enable(struct usb_ep *ep,
  66                 const struct usb_endpoint_descriptor *desc);
  67 static int mv_ep_disable(struct usb_ep *ep);
  68 static int mv_ep_queue(struct usb_ep *ep,
  69                 struct usb_request *req, gfp_t gfp_flags);
  70 static struct usb_request *
  71 mv_ep_alloc_request(struct usb_ep *ep, unsigned int gfp_flags);
  72 static void mv_ep_free_request(struct usb_ep *ep, struct usb_request *_req);
  73
  74 static struct usb_gadget_ops mv_udc_ops = {
  75         .pullup = mv_pullup,
  76 };
  77
  78 static struct usb_ep_ops mv_ep_ops = {
  79         .enable         = mv_ep_enable,
  80         .disable        = mv_ep_disable,
  81         .queue          = mv_ep_queue,
  82         .alloc_request  = mv_ep_alloc_request,
  83         .free_request   = mv_ep_free_request,
  84 };
  85
  86 /* Init values for USB endpoints. */
  87 static const struct usb_ep mv_ep_init[2] = {
  88         [0] = { /* EP 0 */
  89                 .maxpacket      = 64,
  90                 .name           = "ep0",
  91                 .ops            = &mv_ep_ops,
  92         },
  93         [1] = { /* EP 1..n */
  94                 .maxpacket      = 512,
  95                 .name           = "ep-",
  96                 .ops            = &mv_ep_ops,
  97         },
  98 };
  99
 100 static struct mv_drv controller = {
 101         .gadget = {
 102                 .name = "mv_udc",
 103         },
 104 };
 105
 106 static struct usb_request *
 107 mv_ep_alloc_request(struct usb_ep *ep, unsigned int gfp_flags)
 108 {
 109         struct mv_ep *mv_ep = container_of(ep, struct mv_ep, ep);
 110         return &mv_ep->req;
 111 }
 112
 113 static void mv_ep_free_request(struct usb_ep *ep, struct usb_request *_req)
 114 {
 115         return;
 116 }
 117
 118 static void ep_enable(int num, int in)
 119 {
 120         struct ept_queue_head *head;
 121         struct mv_udc *udc = controller.udc;
 122         unsigned n;
 123         head = epts + 2*num + in;
 124
 125         n = readl(&udc->epctrl[num]);
 126         if (in)
 127                 n |= (CTRL_TXE | CTRL_TXR | CTRL_TXT_BULK);
 128         else
 129                 n |= (CTRL_RXE | CTRL_RXR | CTRL_RXT_BULK);
 130
 131         if (num != 0)
 132                 head->config = CONFIG_MAX_PKT(EP_MAX_PACKET_SIZE) | CONFIG_ZLT;
 133         writel(n, &udc->epctrl[num]);
 134 }
 135
 136 static int mv_ep_enable(struct usb_ep *ep,
 137                 const struct usb_endpoint_descriptor *desc)
 138 {
 139         struct mv_ep *mv_ep = container_of(ep, struct mv_ep, ep);
 140         int num, in;
 141         num = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
 142         in = (desc->bEndpointAddress & USB_DIR_IN) != 0;
 143         ep_enable(num, in);
 144         mv_ep->desc = desc;
 145         return 0;
 146 }
 147
 148 static int mv_ep_disable(struct usb_ep *ep)
 149 {
 150         return 0;
 151 }
 152
 153 static int mv_ep_queue(struct usb_ep *ep,
 154                 struct usb_request *req, gfp_t gfp_flags)
 155 {
 156         struct mv_ep *mv_ep = container_of(ep, struct mv_ep, ep);
 157         struct mv_udc *udc = controller.udc;
 158         struct ept_queue_item *item;
 159         struct ept_queue_head *head;
 160         unsigned phys;
 161         int bit, num, len, in;
 162         num = mv_ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
 163         in = (mv_ep->desc->bEndpointAddress & USB_DIR_IN) != 0;
 164         item = items[2 * num + in];
 165         head = epts + 2 * num + in;
 166         phys = (unsigned)req->buf;
 167         len = req->length;
 168
 169         item->next = TERMINATE;
 170         item->info = INFO_BYTES(len) | INFO_IOC | INFO_ACTIVE;
 171         item->page0 = phys;
 172         item->page1 = (phys & 0xfffff000) + 0x1000;
 173
 174         head->next = (unsigned) item;
 175         head->info = 0;
 176
 177         DBG("ept%d %s queue len %x, buffer %x\n",
 178                         num, in ? "in" : "out", len, phys);
 179
 180         if (in)
 181                 bit = EPT_TX(num);
 182         else
 183                 bit = EPT_RX(num);
 184
 185         flush_cache(phys, len);
 186         flush_cache((unsigned long)item, sizeof(struct ept_queue_item));
 187         writel(bit, &udc->epprime);
 188
 189         return 0;
 190 }
 191
 192 static void handle_ep_complete(struct mv_ep *ep)
 193 {
 194         struct ept_queue_item *item;
 195         int num, in, len;
 196         num = ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
 197         in = (ep->desc->bEndpointAddress & USB_DIR_IN) != 0;
 198         if (num == 0)
 199                 ep->desc = &ep0_out_desc;
 200         item = items[2 * num + in];
 201
 202         if (item->info & 0xff)
 203                 printf("EP%d/%s FAIL nfo=%x pg0=%x\n",
 204                         num, in ? "in" : "out", item->info, item->page0);
 205
 206         len = (item->info >> 16) & 0x7fff;
 207         ep->req.length -= len;
 208         DBG("ept%d %s complete %x\n",
 209                         num, in ? "in" : "out", len);
 210         ep->req.complete(&ep->ep, &ep->req);
 211         if (num == 0) {
 212                 ep->req.length = 0;
 213                 usb_ep_queue(&ep->ep, &ep->req, 0);
 214                 ep->desc = &ep0_in_desc;
 215         }
 216 }
 217
 218 #define SETUP(type, request) (((type) << 8) | (request))
 219
 220 static void handle_setup(void)
 221 {
 222         struct usb_request *req = &controller.ep[0].req;
 223         struct mv_udc *udc = controller.udc;
 224         struct ept_queue_head *head;
 225         struct usb_ctrlrequest r;
 226         int status = 0;
 227         int num, in, _num, _in, i;
 228         char *buf;
 229         head = epts;
 230
 231         flush_cache((unsigned long)head, sizeof(struct ept_queue_head));
 232         memcpy(&r, head->setup_data, sizeof(struct usb_ctrlrequest));
 233         writel(EPT_RX(0), &udc->epstat);
 234         DBG("handle setup %s, %x, %x index %x value %x\n", reqname(r.bRequest),
 235             r.bRequestType, r.bRequest, r.wIndex, r.wValue);
 236
 237         switch (SETUP(r.bRequestType, r.bRequest)) {
 238         case SETUP(USB_RECIP_ENDPOINT, USB_REQ_CLEAR_FEATURE):
 239                 _num = r.wIndex & 15;
 240                 _in = !!(r.wIndex & 0x80);
 241
 242                 if ((r.wValue == 0) && (r.wLength == 0)) {
 243                         req->length = 0;
 244                         for (i = 0; i < NUM_ENDPOINTS; i++) {
 245                                 if (!controller.ep[i].desc)
 246                                         continue;
 247                                 num = controller.ep[i].desc->bEndpointAddress
 248                                                 & USB_ENDPOINT_NUMBER_MASK;
 249                                 in = (controller.ep[i].desc->bEndpointAddress
 250                                                 & USB_DIR_IN) != 0;
 251                                 if ((num == _num) && (in == _in)) {
 252                                         ep_enable(num, in);
 253                                         usb_ep_queue(controller.gadget.ep0,
 254                                                         req, 0);
 255                                         break;
 256                                 }
 257                         }
 258                 }
 259                 return;
 260
 261         case SETUP(USB_RECIP_DEVICE, USB_REQ_SET_ADDRESS):
 262                 /*
 263                  * write address delayed (will take effect
 264                  * after the next IN txn)
 265                  */
 266                 writel((r.wValue << 25) | (1 << 24), &udc->devaddr);
 267                 req->length = 0;
 268                 usb_ep_queue(controller.gadget.ep0, req, 0);
 269                 return;
 270
 271         case SETUP(USB_DIR_IN | USB_RECIP_DEVICE, USB_REQ_GET_STATUS):
 272                 req->length = 2;
 273                 buf = (char *)req->buf;
 274                 buf[0] = 1 << USB_DEVICE_SELF_POWERED;
 275                 buf[1] = 0;
 276                 usb_ep_queue(controller.gadget.ep0, req, 0);
 277                 return;
 278         }
 279         /* pass request up to the gadget driver */
 280         if (controller.driver)
 281                 status = controller.driver->setup(&controller.gadget, &r);
 282         else
 283                 status = -ENODEV;
 284
 285         if (!status)
 286                 return;
 287         DBG("STALL reqname %s type %x value %x, index %x\n",
 288             reqname(r.bRequest), r.bRequestType, r.wValue, r.wIndex);
 289         writel((1<<16) | (1 << 0), &udc->epctrl[0]);
 290 }
 291
 292 static void stop_activity(void)
 293 {
 294         int i, num, in;
 295         struct ept_queue_head *head;
 296         struct mv_udc *udc = controller.udc;
 297         writel(readl(&udc->epcomp), &udc->epcomp);
 298         writel(readl(&udc->epstat), &udc->epstat);
 299         writel(0xffffffff, &udc->epflush);
 300
 301         /* error out any pending reqs */
 302         for (i = 0; i < NUM_ENDPOINTS; i++) {
 303                 if (i != 0)
 304                         writel(0, &udc->epctrl[i]);
 305                 if (controller.ep[i].desc) {
 306                         num = controller.ep[i].desc->bEndpointAddress
 307                                 & USB_ENDPOINT_NUMBER_MASK;
 308                         in = (controller.ep[i].desc->bEndpointAddress
 309                                 & USB_DIR_IN) != 0;
 310                         head = epts + (num * 2) + (in);
 311                         head->info = INFO_ACTIVE;
 312                 }
 313         }
 314 }
 315
 316 void udc_irq(void)
 317 {
 318         struct mv_udc *udc = controller.udc;
 319         unsigned n = readl(&udc->usbsts);
 320         writel(n, &udc->usbsts);
 321         int bit, i, num, in;
 322
 323         n &= (STS_SLI | STS_URI | STS_PCI | STS_UI | STS_UEI);
 324         if (n == 0)
 325                 return;
 326
 327         if (n & STS_URI) {
 328                 DBG("-- reset --\n");
 329                 stop_activity();
 330         }
 331         if (n & STS_SLI)
 332                 DBG("-- suspend --\n");
 333
 334         if (n & STS_PCI) {
 335                 DBG("-- portchange --\n");
 336                 bit = (readl(&udc->portsc) >> 26) & 3;
 337                 if (bit == 2) {
 338                         controller.gadget.speed = USB_SPEED_HIGH;
 339                         for (i = 1; i < NUM_ENDPOINTS && n; i++)
 340                                 if (controller.ep[i].desc)
 341                                         controller.ep[i].ep.maxpacket = 512;
 342                 } else {
 343                         controller.gadget.speed = USB_SPEED_FULL;
 344                 }
 345         }
 346
 347         if (n & STS_UEI)
 348                 printf("<UEI %x>\n", readl(&udc->epcomp));
 349
 350         if ((n & STS_UI) || (n & STS_UEI)) {
 351                 n = readl(&udc->epstat);
 352                 if (n & EPT_RX(0))
 353                         handle_setup();
 354
 355                 n = readl(&udc->epcomp);
 356                 if (n != 0)
 357                         writel(n, &udc->epcomp);
 358
 359                 for (i = 0; i < NUM_ENDPOINTS && n; i++) {
 360                         if (controller.ep[i].desc) {
 361                                 num = controller.ep[i].desc->bEndpointAddress
 362                                         & USB_ENDPOINT_NUMBER_MASK;
 363                                 in = (controller.ep[i].desc->bEndpointAddress
 364                                                 & USB_DIR_IN) != 0;
 365                                 bit = (in) ? EPT_TX(num) : EPT_RX(num);
 366                                 if (n & bit)
 367                                         handle_ep_complete(&controller.ep[i]);
 368                         }
 369                 }
 370         }
 371 }
 372
 373 int usb_gadget_handle_interrupts(void)
 374 {
 375         u32 value;
 376         struct mv_udc *udc = controller.udc;
 377
 378         value = readl(&udc->usbsts);
 379         if (value)
 380                 udc_irq();
 381
 382         return value;
 383 }
 384
 385 static int mv_pullup(struct usb_gadget *gadget, int is_on)
 386 {
 387         struct mv_udc *udc = controller.udc;
 388         if (is_on) {
 389                 /* RESET */
 390                 writel(USBCMD_ITC(MICRO_8FRAME) | USBCMD_RST, &udc->usbcmd);
 391                 udelay(200);
 392
 393                 writel((unsigned) epts, &udc->epinitaddr);
 394
 395                 /* select DEVICE mode */
 396                 writel(USBMODE_DEVICE, &udc->usbmode);
 397
 398                 writel(0xffffffff, &udc->epflush);
 399
 400                 /* Turn on the USB connection by enabling the pullup resistor */
 401                 writel(USBCMD_ITC(MICRO_8FRAME) | USBCMD_RUN, &udc->usbcmd);
 402         } else {
 403                 stop_activity();
 404                 writel(USBCMD_FS2, &udc->usbcmd);
 405                 udelay(800);
 406                 if (controller.driver)
 407                         controller.driver->disconnect(gadget);
 408         }
 409
 410         return 0;
 411 }
 412
 413 void udc_disconnect(void)
 414 {
 415         struct mv_udc *udc = controller.udc;
 416         /* disable pullup */
 417         stop_activity();
 418         writel(USBCMD_FS2, &udc->usbcmd);
 419         udelay(800);
 420         if (controller.driver)
 421                 controller.driver->disconnect(&controller.gadget);
 422 }
 423
 424 static int mvudc_probe(void)
 425 {
 426         struct ept_queue_head *head;
 427         int i;
 428
 429         controller.gadget.ops = &mv_udc_ops;
 430         controller.udc = (struct mv_udc *)CONFIG_USB_REG_BASE;
 431         epts = memalign(PAGE_SIZE, QH_MAXNUM * sizeof(struct ept_queue_head));
 432         memset(epts, 0, QH_MAXNUM * sizeof(struct ept_queue_head));
 433         for (i = 0; i < 2 * NUM_ENDPOINTS; i++) {
 434                 /*
 435                  * For item0 and item1, they are served as ep0
 436                  * out&in seperately
 437                  */
 438                 head = epts + i;
 439                 if (i < 2)
 440                         head->config = CONFIG_MAX_PKT(EP0_MAX_PACKET_SIZE)
 441                                 | CONFIG_ZLT | CONFIG_IOS;
 442                 else
 443                         head->config = CONFIG_MAX_PKT(EP_MAX_PACKET_SIZE)
 444                                 | CONFIG_ZLT;
 445                 head->next = TERMINATE;
 446                 head->info = 0;
 447
 448                 items[i] = memalign(PAGE_SIZE, sizeof(struct ept_queue_item));
 449         }
 450
 451         INIT_LIST_HEAD(&controller.gadget.ep_list);
 452
 453         /* Init EP 0 */
 454         memcpy(&controller.ep[0].ep, &mv_ep_init[0], sizeof(*mv_ep_init));
 455         controller.ep[0].desc = &ep0_in_desc;
 456         controller.gadget.ep0 = &controller.ep[0].ep;
 457         INIT_LIST_HEAD(&controller.gadget.ep0->ep_list);
 458
 459         /* Init EP 1..n */
 460         for (i = 1; i < NUM_ENDPOINTS; i++) {
 461                 memcpy(&controller.ep[i].ep, &mv_ep_init[1],
 462                        sizeof(*mv_ep_init));
 463                 list_add_tail(&controller.ep[i].ep.ep_list,
 464                               &controller.gadget.ep_list);
 465         }
 466
 467         return 0;
 468 }
 469
 470 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 471 {
 472         struct mv_udc *udc = controller.udc;
 473         int             retval;
 474         void *ctrl;
 475
 476         if (!driver
 477                         || driver->speed < USB_SPEED_FULL
 478                         || !driver->bind
 479                         || !driver->setup) {
 480                 DBG("bad parameter.\n");
 481                 return -EINVAL;
 482         }
 483
 484         if (!mvudc_probe()) {
 485                 usb_lowlevel_init(0, &ctrl);
 486                 /* select ULPI phy */
 487                 writel(PTS(PTS_ENABLE) | PFSC, &udc->portsc);
 488         }
 489         retval = driver->bind(&controller.gadget);
 490         if (retval) {
 491                 DBG("driver->bind() returned %d\n", retval);
 492                 return retval;
 493         }
 494         controller.driver = driver;
 495
 496         return 0;
 497 }
 498
 499 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 500 {
 501         return 0;
 502 }