drivers/usb/gadget/f_rockusb.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2017
   4  *
   5  * Eddie Cai <eddie.cai.linux@gmail.com>
   6  */
   7 #include <config.h>
   8 #include <common.h>
   9 #include <env.h>
  10 #include <errno.h>
  11 #include <malloc.h>
  12 #include <memalign.h>
  13 #include <linux/usb/ch9.h>
  14 #include <linux/usb/gadget.h>
  15 #include <linux/usb/composite.h>
  16 #include <linux/compiler.h>
  17 #include <version.h>
  18 #include <g_dnl.h>
  19 #include <asm/arch-rockchip/f_rockusb.h>
  20
  21 static inline struct f_rockusb *func_to_rockusb(struct usb_function *f)
  22 {
  23         return container_of(f, struct f_rockusb, usb_function);
  24 }
  25
  26 static struct usb_endpoint_descriptor fs_ep_in = {
  27         .bLength            = USB_DT_ENDPOINT_SIZE,
  28         .bDescriptorType    = USB_DT_ENDPOINT,
  29         .bEndpointAddress   = USB_DIR_IN,
  30         .bmAttributes       = USB_ENDPOINT_XFER_BULK,
  31         .wMaxPacketSize     = cpu_to_le16(64),
  32 };
  33
  34 static struct usb_endpoint_descriptor fs_ep_out = {
  35         .bLength                = USB_DT_ENDPOINT_SIZE,
  36         .bDescriptorType        = USB_DT_ENDPOINT,
  37         .bEndpointAddress       = USB_DIR_OUT,
  38         .bmAttributes           = USB_ENDPOINT_XFER_BULK,
  39         .wMaxPacketSize         = cpu_to_le16(64),
  40 };
  41
  42 static struct usb_endpoint_descriptor hs_ep_in = {
  43         .bLength                = USB_DT_ENDPOINT_SIZE,
  44         .bDescriptorType        = USB_DT_ENDPOINT,
  45         .bEndpointAddress       = USB_DIR_IN,
  46         .bmAttributes           = USB_ENDPOINT_XFER_BULK,
  47         .wMaxPacketSize         = cpu_to_le16(512),
  48 };
  49
  50 static struct usb_endpoint_descriptor hs_ep_out = {
  51         .bLength                = USB_DT_ENDPOINT_SIZE,
  52         .bDescriptorType        = USB_DT_ENDPOINT,
  53         .bEndpointAddress       = USB_DIR_OUT,
  54         .bmAttributes           = USB_ENDPOINT_XFER_BULK,
  55         .wMaxPacketSize         = cpu_to_le16(512),
  56 };
  57
  58 static struct usb_interface_descriptor interface_desc = {
  59         .bLength                = USB_DT_INTERFACE_SIZE,
  60         .bDescriptorType        = USB_DT_INTERFACE,
  61         .bInterfaceNumber       = 0x00,
  62         .bAlternateSetting      = 0x00,
  63         .bNumEndpoints          = 0x02,
  64         .bInterfaceClass        = ROCKUSB_INTERFACE_CLASS,
  65         .bInterfaceSubClass     = ROCKUSB_INTERFACE_SUB_CLASS,
  66         .bInterfaceProtocol     = ROCKUSB_INTERFACE_PROTOCOL,
  67 };
  68
  69 static struct usb_descriptor_header *rkusb_fs_function[] = {
  70         (struct usb_descriptor_header *)&interface_desc,
  71         (struct usb_descriptor_header *)&fs_ep_in,
  72         (struct usb_descriptor_header *)&fs_ep_out,
  73 };
  74
  75 static struct usb_descriptor_header *rkusb_hs_function[] = {
  76         (struct usb_descriptor_header *)&interface_desc,
  77         (struct usb_descriptor_header *)&hs_ep_in,
  78         (struct usb_descriptor_header *)&hs_ep_out,
  79         NULL,
  80 };
  81
  82 static const char rkusb_name[] = "Rockchip Rockusb";
  83
  84 static struct usb_string rkusb_string_defs[] = {
  85         [0].s = rkusb_name,
  86         {  }                    /* end of list */
  87 };
  88
  89 static struct usb_gadget_strings stringtab_rkusb = {
  90         .language       = 0x0409,       /* en-us */
  91         .strings        = rkusb_string_defs,
  92 };
  93
  94 static struct usb_gadget_strings *rkusb_strings[] = {
  95         &stringtab_rkusb,
  96         NULL,
  97 };
  98
  99 static struct f_rockusb *rockusb_func;
 100 static void rx_handler_command(struct usb_ep *ep, struct usb_request *req);
 101 static int rockusb_tx_write_csw(u32 tag, int residue, u8 status, int size);
 102
 103 struct f_rockusb *get_rkusb(void)
 104 {
 105         struct f_rockusb *f_rkusb = rockusb_func;
 106
 107         if (!f_rkusb) {
 108                 f_rkusb = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*f_rkusb));
 109                 if (!f_rkusb)
 110                         return 0;
 111
 112                 rockusb_func = f_rkusb;
 113                 memset(f_rkusb, 0, sizeof(*f_rkusb));
 114         }
 115
 116         if (!f_rkusb->buf_head) {
 117                 f_rkusb->buf_head = memalign(CONFIG_SYS_CACHELINE_SIZE,
 118                                              RKUSB_BUF_SIZE);
 119                 if (!f_rkusb->buf_head)
 120                         return 0;
 121
 122                 f_rkusb->buf = f_rkusb->buf_head;
 123                 memset(f_rkusb->buf_head, 0, RKUSB_BUF_SIZE);
 124         }
 125         return f_rkusb;
 126 }
 127
 128 static struct usb_endpoint_descriptor *rkusb_ep_desc(
 129 struct usb_gadget *g,
 130 struct usb_endpoint_descriptor *fs,
 131 struct usb_endpoint_descriptor *hs)
 132 {
 133         if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
 134                 return hs;
 135         return fs;
 136 }
 137
 138 static void rockusb_complete(struct usb_ep *ep, struct usb_request *req)
 139 {
 140         int status = req->status;
 141
 142         if (!status)
 143                 return;
 144         debug("status: %d ep '%s' trans: %d\n", status, ep->name, req->actual);
 145 }
 146
 147 /* config the rockusb device*/
 148 static int rockusb_bind(struct usb_configuration *c, struct usb_function *f)
 149 {
 150         int id;
 151         struct usb_gadget *gadget = c->cdev->gadget;
 152         struct f_rockusb *f_rkusb = func_to_rockusb(f);
 153         const char *s;
 154
 155         id = usb_interface_id(c, f);
 156         if (id < 0)
 157                 return id;
 158         interface_desc.bInterfaceNumber = id;
 159
 160         id = usb_string_id(c->cdev);
 161         if (id < 0)
 162                 return id;
 163
 164         rkusb_string_defs[0].id = id;
 165         interface_desc.iInterface = id;
 166
 167         f_rkusb->in_ep = usb_ep_autoconfig(gadget, &fs_ep_in);
 168         if (!f_rkusb->in_ep)
 169                 return -ENODEV;
 170         f_rkusb->in_ep->driver_data = c->cdev;
 171
 172         f_rkusb->out_ep = usb_ep_autoconfig(gadget, &fs_ep_out);
 173         if (!f_rkusb->out_ep)
 174                 return -ENODEV;
 175         f_rkusb->out_ep->driver_data = c->cdev;
 176
 177         f->descriptors = rkusb_fs_function;
 178
 179         if (gadget_is_dualspeed(gadget)) {
 180                 hs_ep_in.bEndpointAddress = fs_ep_in.bEndpointAddress;
 181                 hs_ep_out.bEndpointAddress = fs_ep_out.bEndpointAddress;
 182                 f->hs_descriptors = rkusb_hs_function;
 183         }
 184
 185         s = env_get("serial#");
 186         if (s)
 187                 g_dnl_set_serialnumber((char *)s);
 188
 189         return 0;
 190 }
 191
 192 static void rockusb_unbind(struct usb_configuration *c, struct usb_function *f)
 193 {
 194         /* clear the configuration*/
 195         memset(rockusb_func, 0, sizeof(*rockusb_func));
 196 }
 197
 198 static void rockusb_disable(struct usb_function *f)
 199 {
 200         struct f_rockusb *f_rkusb = func_to_rockusb(f);
 201
 202         usb_ep_disable(f_rkusb->out_ep);
 203         usb_ep_disable(f_rkusb->in_ep);
 204
 205         if (f_rkusb->out_req) {
 206                 free(f_rkusb->out_req->buf);
 207                 usb_ep_free_request(f_rkusb->out_ep, f_rkusb->out_req);
 208                 f_rkusb->out_req = NULL;
 209         }
 210         if (f_rkusb->in_req) {
 211                 free(f_rkusb->in_req->buf);
 212                 usb_ep_free_request(f_rkusb->in_ep, f_rkusb->in_req);
 213                 f_rkusb->in_req = NULL;
 214         }
 215         if (f_rkusb->buf_head) {
 216                 free(f_rkusb->buf_head);
 217                 f_rkusb->buf_head = NULL;
 218                 f_rkusb->buf = NULL;
 219         }
 220 }
 221
 222 static struct usb_request *rockusb_start_ep(struct usb_ep *ep)
 223 {
 224         struct usb_request *req;
 225
 226         req = usb_ep_alloc_request(ep, 0);
 227         if (!req)
 228                 return NULL;
 229
 230         req->length = EP_BUFFER_SIZE;
 231         req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE, EP_BUFFER_SIZE);
 232         if (!req->buf) {
 233                 usb_ep_free_request(ep, req);
 234                 return NULL;
 235         }
 236         memset(req->buf, 0, req->length);
 237
 238         return req;
 239 }
 240
 241 static int rockusb_set_alt(struct usb_function *f, unsigned int interface,
 242                            unsigned int alt)
 243 {
 244         int ret;
 245         struct usb_composite_dev *cdev = f->config->cdev;
 246         struct usb_gadget *gadget = cdev->gadget;
 247         struct f_rockusb *f_rkusb = func_to_rockusb(f);
 248         const struct usb_endpoint_descriptor *d;
 249
 250         debug("%s: func: %s intf: %d alt: %d\n",
 251               __func__, f->name, interface, alt);
 252
 253         d = rkusb_ep_desc(gadget, &fs_ep_out, &hs_ep_out);
 254         ret = usb_ep_enable(f_rkusb->out_ep, d);
 255         if (ret) {
 256                 printf("failed to enable out ep\n");
 257                 return ret;
 258         }
 259
 260         f_rkusb->out_req = rockusb_start_ep(f_rkusb->out_ep);
 261         if (!f_rkusb->out_req) {
 262                 printf("failed to alloc out req\n");
 263                 ret = -EINVAL;
 264                 goto err;
 265         }
 266         f_rkusb->out_req->complete = rx_handler_command;
 267
 268         d = rkusb_ep_desc(gadget, &fs_ep_in, &hs_ep_in);
 269         ret = usb_ep_enable(f_rkusb->in_ep, d);
 270         if (ret) {
 271                 printf("failed to enable in ep\n");
 272                 goto err;
 273         }
 274
 275         f_rkusb->in_req = rockusb_start_ep(f_rkusb->in_ep);
 276         if (!f_rkusb->in_req) {
 277                 printf("failed alloc req in\n");
 278                 ret = -EINVAL;
 279                 goto err;
 280         }
 281         f_rkusb->in_req->complete = rockusb_complete;
 282
 283         ret = usb_ep_queue(f_rkusb->out_ep, f_rkusb->out_req, 0);
 284         if (ret)
 285                 goto err;
 286
 287         return 0;
 288 err:
 289         rockusb_disable(f);
 290         return ret;
 291 }
 292
 293 static int rockusb_add(struct usb_configuration *c)
 294 {
 295         struct f_rockusb *f_rkusb = get_rkusb();
 296         int status;
 297
 298         debug("%s: cdev: 0x%p\n", __func__, c->cdev);
 299
 300         f_rkusb->usb_function.name = "f_rockusb";
 301         f_rkusb->usb_function.bind = rockusb_bind;
 302         f_rkusb->usb_function.unbind = rockusb_unbind;
 303         f_rkusb->usb_function.set_alt = rockusb_set_alt;
 304         f_rkusb->usb_function.disable = rockusb_disable;
 305         f_rkusb->usb_function.strings = rkusb_strings;
 306
 307         status = usb_add_function(c, &f_rkusb->usb_function);
 308         if (status) {
 309                 free(f_rkusb);
 310                 rockusb_func = f_rkusb;
 311         }
 312         return status;
 313 }
 314
 315 void rockusb_dev_init(char *dev_type, int dev_index)
 316 {
 317         struct f_rockusb *f_rkusb = get_rkusb();
 318
 319         f_rkusb->dev_type = dev_type;
 320         f_rkusb->dev_index = dev_index;
 321 }
 322
 323 DECLARE_GADGET_BIND_CALLBACK(usb_dnl_rockusb, rockusb_add);
 324
 325 static int rockusb_tx_write(const char *buffer, unsigned int buffer_size)
 326 {
 327         struct usb_request *in_req = rockusb_func->in_req;
 328         int ret;
 329
 330         memcpy(in_req->buf, buffer, buffer_size);
 331         in_req->length = buffer_size;
 332         debug("Transferring 0x%x bytes\n", buffer_size);
 333         usb_ep_dequeue(rockusb_func->in_ep, in_req);
 334         ret = usb_ep_queue(rockusb_func->in_ep, in_req, 0);
 335         if (ret)
 336                 printf("Error %d on queue\n", ret);
 337         return 0;
 338 }
 339
 340 static int rockusb_tx_write_str(const char *buffer)
 341 {
 342         return rockusb_tx_write(buffer, strlen(buffer));
 343 }
 344
 345 #ifdef DEBUG
 346 static void printcbw(char *buf)
 347 {
 348         ALLOC_CACHE_ALIGN_BUFFER(struct fsg_bulk_cb_wrap, cbw,
 349                                  sizeof(struct fsg_bulk_cb_wrap));
 350
 351         memcpy((char *)cbw, buf, USB_BULK_CB_WRAP_LEN);
 352
 353         debug("cbw: signature:%x\n", cbw->signature);
 354         debug("cbw: tag=%x\n", cbw->tag);
 355         debug("cbw: data_transfer_length=%d\n", cbw->data_transfer_length);
 356         debug("cbw: flags=%x\n", cbw->flags);
 357         debug("cbw: lun=%d\n", cbw->lun);
 358         debug("cbw: length=%d\n", cbw->length);
 359         debug("cbw: ucOperCode=%x\n", cbw->CDB[0]);
 360         debug("cbw: ucReserved=%x\n", cbw->CDB[1]);
 361         debug("cbw: dwAddress:%x %x %x %x\n", cbw->CDB[5], cbw->CDB[4],
 362               cbw->CDB[3], cbw->CDB[2]);
 363         debug("cbw: ucReserved2=%x\n", cbw->CDB[6]);
 364         debug("cbw: uslength:%x %x\n", cbw->CDB[8], cbw->CDB[7]);
 365 }
 366
 367 static void printcsw(char *buf)
 368 {
 369         ALLOC_CACHE_ALIGN_BUFFER(struct bulk_cs_wrap, csw,
 370                                  sizeof(struct bulk_cs_wrap));
 371         memcpy((char *)csw, buf, USB_BULK_CS_WRAP_LEN);
 372         debug("csw: signature:%x\n", csw->signature);
 373         debug("csw: tag:%x\n", csw->tag);
 374         debug("csw: residue:%x\n", csw->residue);
 375         debug("csw: status:%x\n", csw->status);
 376 }
 377 #endif
 378
 379 static int rockusb_tx_write_csw(u32 tag, int residue, u8 status, int size)
 380 {
 381         ALLOC_CACHE_ALIGN_BUFFER(struct bulk_cs_wrap, csw,
 382                                  sizeof(struct bulk_cs_wrap));
 383         csw->signature = cpu_to_le32(USB_BULK_CS_SIG);
 384         csw->tag = tag;
 385         csw->residue = cpu_to_be32(residue);
 386         csw->status = status;
 387 #ifdef DEBUG
 388         printcsw((char *)csw);
 389 #endif
 390         return rockusb_tx_write((char *)csw, size);
 391 }
 392
 393 static void tx_handler_send_csw(struct usb_ep *ep, struct usb_request *req)
 394 {
 395         struct f_rockusb *f_rkusb = get_rkusb();
 396         int status = req->status;
 397
 398         if (status)
 399                 debug("status: %d ep '%s' trans: %d\n",
 400                       status, ep->name, req->actual);
 401
 402         /* Return back to default in_req complete function after sending CSW */
 403         req->complete = rockusb_complete;
 404         rockusb_tx_write_csw(f_rkusb->tag, 0, CSW_GOOD, USB_BULK_CS_WRAP_LEN);
 405 }
 406
 407 static unsigned int rx_bytes_expected(struct usb_ep *ep)
 408 {
 409         struct f_rockusb *f_rkusb = get_rkusb();
 410         int rx_remain = f_rkusb->dl_size - f_rkusb->dl_bytes;
 411         unsigned int rem;
 412         unsigned int maxpacket = ep->maxpacket;
 413
 414         if (rx_remain <= 0)
 415                 return 0;
 416         else if (rx_remain > EP_BUFFER_SIZE)
 417                 return EP_BUFFER_SIZE;
 418
 419         rem = rx_remain % maxpacket;
 420         if (rem > 0)
 421                 rx_remain = rx_remain + (maxpacket - rem);
 422
 423         return rx_remain;
 424 }
 425
 426 /* usb_request complete call back to handle upload image */
 427 static void tx_handler_ul_image(struct usb_ep *ep, struct usb_request *req)
 428 {
 429         ALLOC_CACHE_ALIGN_BUFFER(char, rbuffer, RKBLOCK_BUF_SIZE);
 430         struct f_rockusb *f_rkusb = get_rkusb();
 431         struct usb_request *in_req = rockusb_func->in_req;
 432         int ret;
 433
 434         /* Print error status of previous transfer */
 435         if (req->status)
 436                 debug("status: %d ep '%s' trans: %d len %d\n", req->status,
 437                       ep->name, req->actual, req->length);
 438
 439         /* On transfer complete reset in_req and feedback host with CSW_GOOD */
 440         if (f_rkusb->ul_bytes >= f_rkusb->ul_size) {
 441                 in_req->length = 0;
 442                 in_req->complete = rockusb_complete;
 443
 444                 rockusb_tx_write_csw(f_rkusb->tag, 0, CSW_GOOD,
 445                                      USB_BULK_CS_WRAP_LEN);
 446                 return;
 447         }
 448
 449         /* Proceed with current chunk */
 450         unsigned int transfer_size = f_rkusb->ul_size - f_rkusb->ul_bytes;
 451
 452         if (transfer_size > RKBLOCK_BUF_SIZE)
 453                 transfer_size = RKBLOCK_BUF_SIZE;
 454         /* Read at least one block */
 455         unsigned int blkcount = (transfer_size + f_rkusb->desc->blksz - 1) /
 456                                 f_rkusb->desc->blksz;
 457
 458         debug("ul %x bytes, %x blks, read lba %x, ul_size:%x, ul_bytes:%x, ",
 459               transfer_size, blkcount, f_rkusb->lba,
 460               f_rkusb->ul_size, f_rkusb->ul_bytes);
 461
 462         int blks = blk_dread(f_rkusb->desc, f_rkusb->lba, blkcount, rbuffer);
 463
 464         if (blks != blkcount) {
 465                 printf("failed reading from device %s: %d\n",
 466                        f_rkusb->dev_type, f_rkusb->dev_index);
 467                 rockusb_tx_write_csw(f_rkusb->tag, 0, CSW_FAIL,
 468                                      USB_BULK_CS_WRAP_LEN);
 469                 return;
 470         }
 471         f_rkusb->lba += blkcount;
 472         f_rkusb->ul_bytes += transfer_size;
 473
 474         /* Proceed with USB request */
 475         memcpy(in_req->buf, rbuffer, transfer_size);
 476         in_req->length = transfer_size;
 477         in_req->complete = tx_handler_ul_image;
 478         debug("Uploading 0x%x bytes\n", transfer_size);
 479         usb_ep_dequeue(rockusb_func->in_ep, in_req);
 480         ret = usb_ep_queue(rockusb_func->in_ep, in_req, 0);
 481         if (ret)
 482                 printf("Error %d on queue\n", ret);
 483 }
 484
 485 /* usb_request complete call back to handle down load image */
 486 static void rx_handler_dl_image(struct usb_ep *ep, struct usb_request *req)
 487 {
 488         struct f_rockusb *f_rkusb = get_rkusb();
 489         unsigned int transfer_size = 0;
 490         const unsigned char *buffer = req->buf;
 491         unsigned int buffer_size = req->actual;
 492
 493         transfer_size = f_rkusb->dl_size - f_rkusb->dl_bytes;
 494
 495         if (req->status != 0) {
 496                 printf("Bad status: %d\n", req->status);
 497                 rockusb_tx_write_csw(f_rkusb->tag, 0, CSW_FAIL,
 498                                      USB_BULK_CS_WRAP_LEN);
 499                 return;
 500         }
 501
 502         if (buffer_size < transfer_size)
 503                 transfer_size = buffer_size;
 504
 505         memcpy((void *)f_rkusb->buf, buffer, transfer_size);
 506         f_rkusb->dl_bytes += transfer_size;
 507         int blks = 0, blkcnt = transfer_size  / f_rkusb->desc->blksz;
 508
 509         debug("dl %x bytes, %x blks, write lba %x, dl_size:%x, dl_bytes:%x, ",
 510               transfer_size, blkcnt, f_rkusb->lba, f_rkusb->dl_size,
 511               f_rkusb->dl_bytes);
 512         blks = blk_dwrite(f_rkusb->desc, f_rkusb->lba, blkcnt, f_rkusb->buf);
 513         if (blks != blkcnt) {
 514                 printf("failed writing to device %s: %d\n", f_rkusb->dev_type,
 515                        f_rkusb->dev_index);
 516                 rockusb_tx_write_csw(f_rkusb->tag, 0, CSW_FAIL,
 517                                      USB_BULK_CS_WRAP_LEN);
 518                 return;
 519         }
 520         f_rkusb->lba += blkcnt;
 521
 522         /* Check if transfer is done */
 523         if (f_rkusb->dl_bytes >= f_rkusb->dl_size) {
 524                 req->complete = rx_handler_command;
 525                 req->length = EP_BUFFER_SIZE;
 526                 f_rkusb->buf = f_rkusb->buf_head;
 527                 debug("transfer 0x%x bytes done\n", f_rkusb->dl_size);
 528                 f_rkusb->dl_size = 0;
 529                 rockusb_tx_write_csw(f_rkusb->tag, 0, CSW_GOOD,
 530                                      USB_BULK_CS_WRAP_LEN);
 531         } else {
 532                 req->length = rx_bytes_expected(ep);
 533                 if (f_rkusb->buf == f_rkusb->buf_head)
 534                         f_rkusb->buf = f_rkusb->buf_head + EP_BUFFER_SIZE;
 535                 else
 536                         f_rkusb->buf = f_rkusb->buf_head;
 537
 538                 debug("remain %x bytes, %lx sectors\n", req->length,
 539                       req->length / f_rkusb->desc->blksz);
 540         }
 541
 542         req->actual = 0;
 543         usb_ep_queue(ep, req, 0);
 544 }
 545
 546 static void cb_test_unit_ready(struct usb_ep *ep, struct usb_request *req)
 547 {
 548         ALLOC_CACHE_ALIGN_BUFFER(struct fsg_bulk_cb_wrap, cbw,
 549                                  sizeof(struct fsg_bulk_cb_wrap));
 550
 551         memcpy((char *)cbw, req->buf, USB_BULK_CB_WRAP_LEN);
 552
 553         rockusb_tx_write_csw(cbw->tag, cbw->data_transfer_length,
 554                              CSW_GOOD, USB_BULK_CS_WRAP_LEN);
 555 }
 556
 557 static void cb_read_storage_id(struct usb_ep *ep, struct usb_request *req)
 558 {
 559         ALLOC_CACHE_ALIGN_BUFFER(struct fsg_bulk_cb_wrap, cbw,
 560                                  sizeof(struct fsg_bulk_cb_wrap));
 561         struct f_rockusb *f_rkusb = get_rkusb();
 562         char emmc_id[] = "EMMC ";
 563
 564         printf("read storage id\n");
 565         memcpy((char *)cbw, req->buf, USB_BULK_CB_WRAP_LEN);
 566
 567         /* Prepare for sending subsequent CSW_GOOD */
 568         f_rkusb->tag = cbw->tag;
 569         f_rkusb->in_req->complete = tx_handler_send_csw;
 570
 571         rockusb_tx_write_str(emmc_id);
 572 }
 573
 574 int __weak rk_get_bootrom_chip_version(unsigned int *chip_info, int size)
 575 {
 576         return 0;
 577 }
 578
 579 static void cb_get_chip_version(struct usb_ep *ep, struct usb_request *req)
 580 {
 581         ALLOC_CACHE_ALIGN_BUFFER(struct fsg_bulk_cb_wrap, cbw,
 582                                  sizeof(struct fsg_bulk_cb_wrap));
 583         struct f_rockusb *f_rkusb = get_rkusb();
 584         unsigned int chip_info[4], i;
 585
 586         memset(chip_info, 0, sizeof(chip_info));
 587         rk_get_bootrom_chip_version(chip_info, 4);
 588
 589         /*
 590          * Chip Version is a string saved in BOOTROM address space Little Endian
 591          *
 592          * Ex for rk3288: 0x33323041 0x32303134 0x30383133 0x56323030
 593          * which brings:  320A20140813V200
 594          *
 595          * Note that memory version do invert MSB/LSB so printing the char
 596          * buffer will show: A02341023180002V
 597          */
 598         printf("read chip version: ");
 599         for (i = 0; i < 4; i++) {
 600                 printf("%c%c%c%c",
 601                        (chip_info[i] >> 24) & 0xFF,
 602                        (chip_info[i] >> 16) & 0xFF,
 603                        (chip_info[i] >>  8) & 0xFF,
 604                        (chip_info[i] >>  0) & 0xFF);
 605         }
 606         printf("\n");
 607         memcpy((char *)cbw, req->buf, USB_BULK_CB_WRAP_LEN);
 608
 609         /* Prepare for sending subsequent CSW_GOOD */
 610         f_rkusb->tag = cbw->tag;
 611         f_rkusb->in_req->complete = tx_handler_send_csw;
 612
 613         rockusb_tx_write((char *)chip_info, sizeof(chip_info));
 614 }
 615
 616 static void cb_read_lba(struct usb_ep *ep, struct usb_request *req)
 617 {
 618         ALLOC_CACHE_ALIGN_BUFFER(struct fsg_bulk_cb_wrap, cbw,
 619                                  sizeof(struct fsg_bulk_cb_wrap));
 620         struct f_rockusb *f_rkusb = get_rkusb();
 621         int sector_count;
 622
 623         memcpy((char *)cbw, req->buf, USB_BULK_CB_WRAP_LEN);
 624         sector_count = (int)get_unaligned_be16(&cbw->CDB[7]);
 625         f_rkusb->tag = cbw->tag;
 626
 627         if (!f_rkusb->desc) {
 628                 char *type = f_rkusb->dev_type;
 629                 int index = f_rkusb->dev_index;
 630
 631                 f_rkusb->desc = blk_get_dev(type, index);
 632                 if (!f_rkusb->desc ||
 633                     f_rkusb->desc->type == DEV_TYPE_UNKNOWN) {
 634                         printf("invalid device \"%s\", %d\n", type, index);
 635                         rockusb_tx_write_csw(f_rkusb->tag, 0, CSW_FAIL,
 636                                              USB_BULK_CS_WRAP_LEN);
 637                         return;
 638                 }
 639         }
 640
 641         f_rkusb->lba = get_unaligned_be32(&cbw->CDB[2]);
 642         f_rkusb->ul_size = sector_count * f_rkusb->desc->blksz;
 643         f_rkusb->ul_bytes = 0;
 644
 645         debug("require read %x bytes, %x sectors from lba %x\n",
 646               f_rkusb->ul_size, sector_count, f_rkusb->lba);
 647
 648         if (f_rkusb->ul_size == 0)  {
 649                 rockusb_tx_write_csw(cbw->tag, cbw->data_transfer_length,
 650                                      CSW_FAIL, USB_BULK_CS_WRAP_LEN);
 651                 return;
 652         }
 653
 654         /* Start right now sending first chunk */
 655         tx_handler_ul_image(ep, req);
 656 }
 657
 658 static void cb_write_lba(struct usb_ep *ep, struct usb_request *req)
 659 {
 660         ALLOC_CACHE_ALIGN_BUFFER(struct fsg_bulk_cb_wrap, cbw,
 661                                  sizeof(struct fsg_bulk_cb_wrap));
 662         struct f_rockusb *f_rkusb = get_rkusb();
 663         int sector_count;
 664
 665         memcpy((char *)cbw, req->buf, USB_BULK_CB_WRAP_LEN);
 666         sector_count = (int)get_unaligned_be16(&cbw->CDB[7]);
 667         f_rkusb->tag = cbw->tag;
 668
 669         if (!f_rkusb->desc) {
 670                 char *type = f_rkusb->dev_type;
 671                 int index = f_rkusb->dev_index;
 672
 673                 f_rkusb->desc = blk_get_dev(type, index);
 674                 if (!f_rkusb->desc ||
 675                     f_rkusb->desc->type == DEV_TYPE_UNKNOWN) {
 676                         printf("invalid device \"%s\", %d\n", type, index);
 677                         rockusb_tx_write_csw(f_rkusb->tag, 0, CSW_FAIL,
 678                                              USB_BULK_CS_WRAP_LEN);
 679                         return;
 680                 }
 681         }
 682
 683         f_rkusb->lba = get_unaligned_be32(&cbw->CDB[2]);
 684         f_rkusb->dl_size = sector_count * f_rkusb->desc->blksz;
 685         f_rkusb->dl_bytes = 0;
 686
 687         debug("require write %x bytes, %x sectors to lba %x\n",
 688               f_rkusb->dl_size, sector_count, f_rkusb->lba);
 689
 690         if (f_rkusb->dl_size == 0)  {
 691                 rockusb_tx_write_csw(cbw->tag, cbw->data_transfer_length,
 692                                      CSW_FAIL, USB_BULK_CS_WRAP_LEN);
 693         } else {
 694                 req->complete = rx_handler_dl_image;
 695                 req->length = rx_bytes_expected(ep);
 696         }
 697 }
 698
 699 static void cb_erase_lba(struct usb_ep *ep, struct usb_request *req)
 700 {
 701         ALLOC_CACHE_ALIGN_BUFFER(struct fsg_bulk_cb_wrap, cbw,
 702                                  sizeof(struct fsg_bulk_cb_wrap));
 703         struct f_rockusb *f_rkusb = get_rkusb();
 704         int sector_count, lba, blks;
 705
 706         memcpy((char *)cbw, req->buf, USB_BULK_CB_WRAP_LEN);
 707         sector_count = (int)get_unaligned_be16(&cbw->CDB[7]);
 708         f_rkusb->tag = cbw->tag;
 709
 710         if (!f_rkusb->desc) {
 711                 char *type = f_rkusb->dev_type;
 712                 int index = f_rkusb->dev_index;
 713
 714                 f_rkusb->desc = blk_get_dev(type, index);
 715                 if (!f_rkusb->desc ||
 716                     f_rkusb->desc->type == DEV_TYPE_UNKNOWN) {
 717                         printf("invalid device \"%s\", %d\n", type, index);
 718                         rockusb_tx_write_csw(f_rkusb->tag, 0, CSW_FAIL,
 719                                              USB_BULK_CS_WRAP_LEN);
 720                         return;
 721                 }
 722         }
 723
 724         lba = get_unaligned_be32(&cbw->CDB[2]);
 725
 726         debug("require erase %x sectors from lba %x\n",
 727               sector_count, lba);
 728
 729         blks = blk_derase(f_rkusb->desc, lba, sector_count);
 730         if (blks != sector_count) {
 731                 printf("failed erasing device %s: %d\n", f_rkusb->dev_type,
 732                        f_rkusb->dev_index);
 733                 rockusb_tx_write_csw(f_rkusb->tag,
 734                                      cbw->data_transfer_length, CSW_FAIL,
 735                                      USB_BULK_CS_WRAP_LEN);
 736                 return;
 737         }
 738
 739         rockusb_tx_write_csw(cbw->tag, cbw->data_transfer_length, CSW_GOOD,
 740                              USB_BULK_CS_WRAP_LEN);
 741 }
 742
 743 void __weak rkusb_set_reboot_flag(int flag)
 744 {
 745         struct f_rockusb *f_rkusb = get_rkusb();
 746
 747         printf("rockkusb set reboot flag: %d\n", f_rkusb->reboot_flag);
 748 }
 749
 750 static void compl_do_reset(struct usb_ep *ep, struct usb_request *req)
 751 {
 752         struct f_rockusb *f_rkusb = get_rkusb();
 753
 754         rkusb_set_reboot_flag(f_rkusb->reboot_flag);
 755         do_reset(NULL, 0, 0, NULL);
 756 }
 757
 758 static void cb_reboot(struct usb_ep *ep, struct usb_request *req)
 759 {
 760         ALLOC_CACHE_ALIGN_BUFFER(struct fsg_bulk_cb_wrap, cbw,
 761                                  sizeof(struct fsg_bulk_cb_wrap));
 762         struct f_rockusb *f_rkusb = get_rkusb();
 763
 764         memcpy((char *)cbw, req->buf, USB_BULK_CB_WRAP_LEN);
 765         f_rkusb->reboot_flag = cbw->CDB[1];
 766         rockusb_func->in_req->complete = compl_do_reset;
 767         rockusb_tx_write_csw(cbw->tag, cbw->data_transfer_length, CSW_GOOD,
 768                              USB_BULK_CS_WRAP_LEN);
 769 }
 770
 771 static void cb_not_support(struct usb_ep *ep, struct usb_request *req)
 772 {
 773         ALLOC_CACHE_ALIGN_BUFFER(struct fsg_bulk_cb_wrap, cbw,
 774                                  sizeof(struct fsg_bulk_cb_wrap));
 775
 776         memcpy((char *)cbw, req->buf, USB_BULK_CB_WRAP_LEN);
 777         printf("Rockusb command %x not support yet\n", cbw->CDB[0]);
 778         rockusb_tx_write_csw(cbw->tag, 0, CSW_FAIL, USB_BULK_CS_WRAP_LEN);
 779 }
 780
 781 static const struct cmd_dispatch_info cmd_dispatch_info[] = {
 782         {
 783                 .cmd = K_FW_TEST_UNIT_READY,
 784                 .cb = cb_test_unit_ready,
 785         },
 786         {
 787                 .cmd = K_FW_READ_FLASH_ID,
 788                 .cb = cb_read_storage_id,
 789         },
 790         {
 791                 .cmd = K_FW_SET_DEVICE_ID,
 792                 .cb = cb_not_support,
 793         },
 794         {
 795                 .cmd = K_FW_TEST_BAD_BLOCK,
 796                 .cb = cb_not_support,
 797         },
 798         {
 799                 .cmd = K_FW_READ_10,
 800                 .cb = cb_not_support,
 801         },
 802         {
 803                 .cmd = K_FW_WRITE_10,
 804                 .cb = cb_not_support,
 805         },
 806         {
 807                 .cmd = K_FW_ERASE_10,
 808                 .cb = cb_not_support,
 809         },
 810         {
 811                 .cmd = K_FW_WRITE_SPARE,
 812                 .cb = cb_not_support,
 813         },
 814         {
 815                 .cmd = K_FW_READ_SPARE,
 816                 .cb = cb_not_support,
 817         },
 818         {
 819                 .cmd = K_FW_ERASE_10_FORCE,
 820                 .cb = cb_not_support,
 821         },
 822         {
 823                 .cmd = K_FW_GET_VERSION,
 824                 .cb = cb_not_support,
 825         },
 826         {
 827                 .cmd = K_FW_LBA_READ_10,
 828                 .cb = cb_read_lba,
 829         },
 830         {
 831                 .cmd = K_FW_LBA_WRITE_10,
 832                 .cb = cb_write_lba,
 833         },
 834         {
 835                 .cmd = K_FW_ERASE_SYS_DISK,
 836                 .cb = cb_not_support,
 837         },
 838         {
 839                 .cmd = K_FW_SDRAM_READ_10,
 840                 .cb = cb_not_support,
 841         },
 842         {
 843                 .cmd = K_FW_SDRAM_WRITE_10,
 844                 .cb = cb_not_support,
 845         },
 846         {
 847                 .cmd = K_FW_SDRAM_EXECUTE,
 848                 .cb = cb_not_support,
 849         },
 850         {
 851                 .cmd = K_FW_READ_FLASH_INFO,
 852                 .cb = cb_not_support,
 853         },
 854         {
 855                 .cmd = K_FW_GET_CHIP_VER,
 856                 .cb = cb_get_chip_version,
 857         },
 858         {
 859                 .cmd = K_FW_LOW_FORMAT,
 860                 .cb = cb_not_support,
 861         },
 862         {
 863                 .cmd = K_FW_SET_RESET_FLAG,
 864                 .cb = cb_not_support,
 865         },
 866         {
 867                 .cmd = K_FW_SPI_READ_10,
 868                 .cb = cb_not_support,
 869         },
 870         {
 871                 .cmd = K_FW_SPI_WRITE_10,
 872                 .cb = cb_not_support,
 873         },
 874         {
 875                 .cmd = K_FW_LBA_ERASE_10,
 876                 .cb = cb_erase_lba,
 877         },
 878         {
 879                 .cmd = K_FW_SESSION,
 880                 .cb = cb_not_support,
 881         },
 882         {
 883                 .cmd = K_FW_RESET,
 884                 .cb = cb_reboot,
 885         },
 886 };
 887
 888 static void rx_handler_command(struct usb_ep *ep, struct usb_request *req)
 889 {
 890         void (*func_cb)(struct usb_ep *ep, struct usb_request *req) = NULL;
 891
 892         ALLOC_CACHE_ALIGN_BUFFER(struct fsg_bulk_cb_wrap, cbw,
 893                                  sizeof(struct fsg_bulk_cb_wrap));
 894         char *cmdbuf = req->buf;
 895         int i;
 896
 897         if (req->status || req->length == 0)
 898                 return;
 899
 900         memcpy((char *)cbw, req->buf, USB_BULK_CB_WRAP_LEN);
 901 #ifdef DEBUG
 902         printcbw(req->buf);
 903 #endif
 904
 905         for (i = 0; i < ARRAY_SIZE(cmd_dispatch_info); i++) {
 906                 if (cmd_dispatch_info[i].cmd == cbw->CDB[0]) {
 907                         func_cb = cmd_dispatch_info[i].cb;
 908                         break;
 909                 }
 910         }
 911
 912         if (!func_cb) {
 913                 printf("unknown command: %s\n", (char *)req->buf);
 914                 rockusb_tx_write_str("FAILunknown command");
 915         } else {
 916                 if (req->actual < req->length) {
 917                         u8 *buf = (u8 *)req->buf;
 918
 919                         buf[req->actual] = 0;
 920                         func_cb(ep, req);
 921                 } else {
 922                         puts("buffer overflow\n");
 923                         rockusb_tx_write_str("FAILbuffer overflow");
 924                 }
 925         }
 926
 927         *cmdbuf = '\0';
 928         req->actual = 0;
 929         usb_ep_queue(ep, req, 0);
 930 }