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