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 static struct mv_ep ep[2 * NUM_ENDPOINTS];
  87 static struct mv_drv controller = {
  88         .gadget = {
  89                 .ep0 = &ep[0].ep,
  90                 .name = "mv_udc",
  91         },
  92 };
  93
  94 static struct usb_request *
  95 mv_ep_alloc_request(struct usb_ep *ep, unsigned int gfp_flags)
  96 {
  97         struct mv_ep *mv_ep = container_of(ep, struct mv_ep, ep);
  98         return &mv_ep->req;
  99 }
 100
 101 static void mv_ep_free_request(struct usb_ep *ep, struct usb_request *_req)
 102 {
 103         return;
 104 }
 105
 106 static void ep_enable(int num, int in)
 107 {
 108         struct ept_queue_head *head;
 109         struct mv_udc *udc = controller.udc;
 110         unsigned n;
 111         head = epts + 2*num + in;
 112
 113         n = readl(&udc->epctrl[num]);
 114         if (in)
 115                 n |= (CTRL_TXE | CTRL_TXR | CTRL_TXT_BULK);
 116         else
 117                 n |= (CTRL_RXE | CTRL_RXR | CTRL_RXT_BULK);
 118
 119         if (num != 0)
 120                 head->config = CONFIG_MAX_PKT(EP_MAX_PACKET_SIZE) | CONFIG_ZLT;
 121         writel(n, &udc->epctrl[num]);
 122 }
 123
 124 static int mv_ep_enable(struct usb_ep *ep,
 125                 const struct usb_endpoint_descriptor *desc)
 126 {
 127         struct mv_ep *mv_ep = container_of(ep, struct mv_ep, ep);
 128         int num, in;
 129         num = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
 130         in = (desc->bEndpointAddress & USB_DIR_IN) != 0;
 131         ep_enable(num, in);
 132         mv_ep->desc = desc;
 133         return 0;
 134 }
 135
 136 static int mv_ep_disable(struct usb_ep *ep)
 137 {
 138         return 0;
 139 }
 140
 141 static int mv_ep_queue(struct usb_ep *ep,
 142                 struct usb_request *req, gfp_t gfp_flags)
 143 {
 144         struct mv_ep *mv_ep = container_of(ep, struct mv_ep, ep);
 145         struct mv_udc *udc = controller.udc;
 146         struct ept_queue_item *item;
 147         struct ept_queue_head *head;
 148         unsigned phys;
 149         int bit, num, len, in;
 150         num = mv_ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
 151         in = (mv_ep->desc->bEndpointAddress & USB_DIR_IN) != 0;
 152         item = items[2 * num + in];
 153         head = epts + 2 * num + in;
 154         phys = (unsigned)req->buf;
 155         len = req->length;
 156
 157         item->next = TERMINATE;
 158         item->info = INFO_BYTES(len) | INFO_IOC | INFO_ACTIVE;
 159         item->page0 = phys;
 160         item->page1 = (phys & 0xfffff000) + 0x1000;
 161
 162         head->next = (unsigned) item;
 163         head->info = 0;
 164
 165         DBG("ept%d %s queue len %x, buffer %x\n",
 166                         num, in ? "in" : "out", len, phys);
 167
 168         if (in)
 169                 bit = EPT_TX(num);
 170         else
 171                 bit = EPT_RX(num);
 172
 173         flush_cache(phys, len);
 174         flush_cache((unsigned long)item, sizeof(struct ept_queue_item));
 175         writel(bit, &udc->epprime);
 176
 177         return 0;
 178 }
 179
 180 static void handle_ep_complete(struct mv_ep *ep)
 181 {
 182         struct ept_queue_item *item;
 183         int num, in, len;
 184         num = ep->desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
 185         in = (ep->desc->bEndpointAddress & USB_DIR_IN) != 0;
 186         if (num == 0)
 187                 ep->desc = &ep0_out_desc;
 188         item = items[2 * num + in];
 189
 190         if (item->info & 0xff)
 191                 printf("EP%d/%s FAIL nfo=%x pg0=%x\n",
 192                         num, in ? "in" : "out", item->info, item->page0);
 193
 194         len = (item->info >> 16) & 0x7fff;
 195         ep->req.length -= len;
 196         DBG("ept%d %s complete %x\n",
 197                         num, in ? "in" : "out", len);
 198         ep->req.complete(&ep->ep, &ep->req);
 199         if (num == 0) {
 200                 ep->req.length = 0;
 201                 usb_ep_queue(&ep->ep, &ep->req, 0);
 202                 ep->desc = &ep0_in_desc;
 203         }
 204 }
 205
 206 #define SETUP(type, request) (((type) << 8) | (request))
 207
 208 static void handle_setup(void)
 209 {
 210         struct usb_request *req = &ep[0].req;
 211         struct mv_udc *udc = controller.udc;
 212         struct ept_queue_head *head;
 213         struct usb_ctrlrequest r;
 214         int status = 0;
 215         int num, in, _num, _in, i;
 216         char *buf;
 217         head = epts;
 218
 219         flush_cache((unsigned long)head, sizeof(struct ept_queue_head));
 220         memcpy(&r, head->setup_data, sizeof(struct usb_ctrlrequest));
 221         writel(EPT_RX(0), &udc->epstat);
 222         DBG("handle setup %s, %x, %x index %x value %x\n", reqname(r.bRequest),
 223             r.bRequestType, r.bRequest, r.wIndex, r.wValue);
 224
 225         switch (SETUP(r.bRequestType, r.bRequest)) {
 226         case SETUP(USB_RECIP_ENDPOINT, USB_REQ_CLEAR_FEATURE):
 227                 _num = r.wIndex & 15;
 228                 _in = !!(r.wIndex & 0x80);
 229
 230                 if ((r.wValue == 0) && (r.wLength == 0)) {
 231                         req->length = 0;
 232                         for (i = 0; i < NUM_ENDPOINTS; i++) {
 233                                 if (!ep[i].desc)
 234                                         continue;
 235                                 num = ep[i].desc->bEndpointAddress
 236                                         & USB_ENDPOINT_NUMBER_MASK;
 237                                 in = (ep[i].desc->bEndpointAddress
 238                                                 & USB_DIR_IN) != 0;
 239                                 if ((num == _num) && (in == _in)) {
 240                                         ep_enable(num, in);
 241                                         usb_ep_queue(controller.gadget.ep0,
 242                                                         req, 0);
 243                                         break;
 244                                 }
 245                         }
 246                 }
 247                 return;
 248
 249         case SETUP(USB_RECIP_DEVICE, USB_REQ_SET_ADDRESS):
 250                 /*
 251                  * write address delayed (will take effect
 252                  * after the next IN txn)
 253                  */
 254                 writel((r.wValue << 25) | (1 << 24), &udc->devaddr);
 255                 req->length = 0;
 256                 usb_ep_queue(controller.gadget.ep0, req, 0);
 257                 return;
 258
 259         case SETUP(USB_DIR_IN | USB_RECIP_DEVICE, USB_REQ_GET_STATUS):
 260                 req->length = 2;
 261                 buf = (char *)req->buf;
 262                 buf[0] = 1 << USB_DEVICE_SELF_POWERED;
 263                 buf[1] = 0;
 264                 usb_ep_queue(controller.gadget.ep0, req, 0);
 265                 return;
 266         }
 267         /* pass request up to the gadget driver */
 268         if (controller.driver)
 269                 status = controller.driver->setup(&controller.gadget, &r);
 270         else
 271                 status = -ENODEV;
 272
 273         if (!status)
 274                 return;
 275         DBG("STALL reqname %s type %x value %x, index %x\n",
 276             reqname(r.bRequest), r.bRequestType, r.wValue, r.wIndex);
 277         writel((1<<16) | (1 << 0), &udc->epctrl[0]);
 278 }
 279
 280 static void stop_activity(void)
 281 {
 282         int i, num, in;
 283         struct ept_queue_head *head;
 284         struct mv_udc *udc = controller.udc;
 285         writel(readl(&udc->epcomp), &udc->epcomp);
 286         writel(readl(&udc->epstat), &udc->epstat);
 287         writel(0xffffffff, &udc->epflush);
 288
 289         /* error out any pending reqs */
 290         for (i = 0; i < NUM_ENDPOINTS; i++) {
 291                 if (i != 0)
 292                         writel(0, &udc->epctrl[i]);
 293                 if (ep[i].desc) {
 294                         num = ep[i].desc->bEndpointAddress
 295                                 & USB_ENDPOINT_NUMBER_MASK;
 296                         in = (ep[i].desc->bEndpointAddress & USB_DIR_IN) != 0;
 297                         head = epts + (num * 2) + (in);
 298                         head->info = INFO_ACTIVE;
 299                 }
 300         }
 301 }
 302
 303 void udc_irq(void)
 304 {
 305         struct mv_udc *udc = controller.udc;
 306         unsigned n = readl(&udc->usbsts);
 307         writel(n, &udc->usbsts);
 308         int bit, i, num, in;
 309
 310         n &= (STS_SLI | STS_URI | STS_PCI | STS_UI | STS_UEI);
 311         if (n == 0)
 312                 return;
 313
 314         if (n & STS_URI) {
 315                 DBG("-- reset --\n");
 316                 stop_activity();
 317         }
 318         if (n & STS_SLI)
 319                 DBG("-- suspend --\n");
 320
 321         if (n & STS_PCI) {
 322                 DBG("-- portchange --\n");
 323                 bit = (readl(&udc->portsc) >> 26) & 3;
 324                 if (bit == 2) {
 325                         controller.gadget.speed = USB_SPEED_HIGH;
 326                         for (i = 1; i < NUM_ENDPOINTS && n; i++)
 327                                 if (ep[i].desc)
 328                                         ep[i].ep.maxpacket = 512;
 329                 } else {
 330                         controller.gadget.speed = USB_SPEED_FULL;
 331                 }
 332         }
 333
 334         if (n & STS_UEI)
 335                 printf("<UEI %x>\n", readl(&udc->epcomp));
 336
 337         if ((n & STS_UI) || (n & STS_UEI)) {
 338                 n = readl(&udc->epstat);
 339                 if (n & EPT_RX(0))
 340                         handle_setup();
 341
 342                 n = readl(&udc->epcomp);
 343                 if (n != 0)
 344                         writel(n, &udc->epcomp);
 345
 346                 for (i = 0; i < NUM_ENDPOINTS && n; i++) {
 347                         if (ep[i].desc) {
 348                                 num = ep[i].desc->bEndpointAddress
 349                                         & USB_ENDPOINT_NUMBER_MASK;
 350                                 in = (ep[i].desc->bEndpointAddress
 351                                                 & USB_DIR_IN) != 0;
 352                                 bit = (in) ? EPT_TX(num) : EPT_RX(num);
 353                                 if (n & bit)
 354                                         handle_ep_complete(&ep[i]);
 355                         }
 356                 }
 357         }
 358 }
 359
 360 int usb_gadget_handle_interrupts(void)
 361 {
 362         u32 value;
 363         struct mv_udc *udc = controller.udc;
 364
 365         value = readl(&udc->usbsts);
 366         if (value)
 367                 udc_irq();
 368
 369         return value;
 370 }
 371
 372 static int mv_pullup(struct usb_gadget *gadget, int is_on)
 373 {
 374         struct mv_udc *udc = controller.udc;
 375         if (is_on) {
 376                 /* RESET */
 377                 writel(USBCMD_ITC(MICRO_8FRAME) | USBCMD_RST, &udc->usbcmd);
 378                 udelay(200);
 379
 380                 writel((unsigned) epts, &udc->epinitaddr);
 381
 382                 /* select DEVICE mode */
 383                 writel(USBMODE_DEVICE, &udc->usbmode);
 384
 385                 writel(0xffffffff, &udc->epflush);
 386
 387                 /* Turn on the USB connection by enabling the pullup resistor */
 388                 writel(USBCMD_ITC(MICRO_8FRAME) | USBCMD_RUN, &udc->usbcmd);
 389         } else {
 390                 stop_activity();
 391                 writel(USBCMD_FS2, &udc->usbcmd);
 392                 udelay(800);
 393                 if (controller.driver)
 394                         controller.driver->disconnect(gadget);
 395         }
 396
 397         return 0;
 398 }
 399
 400 void udc_disconnect(void)
 401 {
 402         struct mv_udc *udc = controller.udc;
 403         /* disable pullup */
 404         stop_activity();
 405         writel(USBCMD_FS2, &udc->usbcmd);
 406         udelay(800);
 407         if (controller.driver)
 408                 controller.driver->disconnect(&controller.gadget);
 409 }
 410
 411 static int mvudc_probe(void)
 412 {
 413         struct ept_queue_head *head;
 414         int i;
 415
 416         controller.gadget.ops = &mv_udc_ops;
 417         controller.udc = (struct mv_udc *)CONFIG_USB_REG_BASE;
 418         epts = memalign(PAGE_SIZE, QH_MAXNUM * sizeof(struct ept_queue_head));
 419         memset(epts, 0, QH_MAXNUM * sizeof(struct ept_queue_head));
 420         for (i = 0; i < 2 * NUM_ENDPOINTS; i++) {
 421                 /*
 422                  * For item0 and item1, they are served as ep0
 423                  * out&in seperately
 424                  */
 425                 head = epts + i;
 426                 if (i < 2)
 427                         head->config = CONFIG_MAX_PKT(EP0_MAX_PACKET_SIZE)
 428                                 | CONFIG_ZLT | CONFIG_IOS;
 429                 else
 430                         head->config = CONFIG_MAX_PKT(EP_MAX_PACKET_SIZE)
 431                                 | CONFIG_ZLT;
 432                 head->next = TERMINATE;
 433                 head->info = 0;
 434
 435                 items[i] = memalign(PAGE_SIZE, sizeof(struct ept_queue_item));
 436         }
 437
 438         INIT_LIST_HEAD(&controller.gadget.ep_list);
 439         ep[0].ep.maxpacket = 64;
 440         ep[0].ep.name = "ep0";
 441         ep[0].desc = &ep0_in_desc;
 442         INIT_LIST_HEAD(&controller.gadget.ep0->ep_list);
 443         for (i = 0; i < 2 * NUM_ENDPOINTS; i++) {
 444                 if (i != 0) {
 445                         ep[i].ep.maxpacket = 512;
 446                         ep[i].ep.name = "ep-";
 447                         list_add_tail(&ep[i].ep.ep_list,
 448                                       &controller.gadget.ep_list);
 449                         ep[i].desc = NULL;
 450                 }
 451                 ep[i].ep.ops = &mv_ep_ops;
 452         }
 453         return 0;
 454 }
 455
 456 int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 457 {
 458         struct mv_udc *udc = controller.udc;
 459         int             retval;
 460         void *ctrl;
 461
 462         if (!driver
 463                         || driver->speed < USB_SPEED_FULL
 464                         || !driver->bind
 465                         || !driver->setup) {
 466                 DBG("bad parameter.\n");
 467                 return -EINVAL;
 468         }
 469
 470         if (!mvudc_probe()) {
 471                 usb_lowlevel_init(0, &ctrl);
 472                 /* select ULPI phy */
 473                 writel(PTS(PTS_ENABLE) | PFSC, &udc->portsc);
 474         }
 475         retval = driver->bind(&controller.gadget);
 476         if (retval) {
 477                 DBG("driver->bind() returned %d\n", retval);
 478                 return retval;
 479         }
 480         controller.driver = driver;
 481
 482         return 0;
 483 }
 484
 485 int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 486 {
 487         return 0;
 488 }