drivers/net/wireless/rsi/rsi_91x_usb.c

   1 /*
   2  * Copyright (c) 2014 Redpine Signals Inc.
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  *
  16  */
  17
  18 #include <linux/module.h>
  19 #include <linux/types.h>
  20 #include <net/rsi_91x.h>
  21 #include "rsi_usb.h"
  22 #include "rsi_hal.h"
  23 #include "rsi_coex.h"
  24
  25 /* Default operating mode is wlan STA + BT */
  26 static u16 dev_oper_mode = DEV_OPMODE_STA_BT_DUAL;
  27 module_param(dev_oper_mode, ushort, 0444);
  28 MODULE_PARM_DESC(dev_oper_mode, DEV_OPMODE_PARAM_DESC);
  29
  30 static int rsi_rx_urb_submit(struct rsi_hw *adapter, u8 ep_num, gfp_t flags);
  31
  32 /**
  33  * rsi_usb_card_write() - This function writes to the USB Card.
  34  * @adapter: Pointer to the adapter structure.
  35  * @buf: Pointer to the buffer from where the data has to be taken.
  36  * @len: Length to be written.
  37  * @endpoint: Type of endpoint.
  38  *
  39  * Return: status: 0 on success, a negative error code on failure.
  40  */
  41 static int rsi_usb_card_write(struct rsi_hw *adapter,
  42                               u8 *buf,
  43                               u16 len,
  44                               u8 endpoint)
  45 {
  46         struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
  47         int status;
  48         u8 *seg = dev->tx_buffer;
  49         int transfer;
  50         int ep = dev->bulkout_endpoint_addr[endpoint - 1];
  51
  52         memset(seg, 0, len + RSI_USB_TX_HEAD_ROOM);
  53         memcpy(seg + RSI_USB_TX_HEAD_ROOM, buf, len);
  54         len += RSI_USB_TX_HEAD_ROOM;
  55         transfer = len;
  56         status = usb_bulk_msg(dev->usbdev,
  57                               usb_sndbulkpipe(dev->usbdev, ep),
  58                               (void *)seg,
  59                               (int)len,
  60                               &transfer,
  61                               USB_CTRL_SET_TIMEOUT);
  62
  63         if (status < 0) {
  64                 rsi_dbg(ERR_ZONE,
  65                         "Card write failed with error code :%10d\n", status);
  66                 dev->write_fail = 1;
  67         }
  68         return status;
  69 }
  70
  71 /**
  72  * rsi_write_multiple() - This function writes multiple bytes of information
  73  *                        to the USB card.
  74  * @adapter: Pointer to the adapter structure.
  75  * @endpoint: Type of endpoint.
  76  * @data: Pointer to the data that has to be written.
  77  * @count: Number of multiple bytes to be written.
  78  *
  79  * Return: 0 on success, a negative error code on failure.
  80  */
  81 static int rsi_write_multiple(struct rsi_hw *adapter,
  82                               u8 endpoint,
  83                               u8 *data,
  84                               u32 count)
  85 {
  86         struct rsi_91x_usbdev *dev;
  87
  88         if (!adapter)
  89                 return -ENODEV;
  90
  91         if (endpoint == 0)
  92                 return -EINVAL;
  93
  94         dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
  95         if (dev->write_fail)
  96                 return -ENETDOWN;
  97
  98         return rsi_usb_card_write(adapter, data, count, endpoint);
  99 }
 100
 101 /**
 102  * rsi_find_bulk_in_and_out_endpoints() - This function initializes the bulk
 103  *                                        endpoints to the device.
 104  * @interface: Pointer to the USB interface structure.
 105  * @adapter: Pointer to the adapter structure.
 106  *
 107  * Return: ret_val: 0 on success, -ENOMEM on failure.
 108  */
 109 static int rsi_find_bulk_in_and_out_endpoints(struct usb_interface *interface,
 110                                               struct rsi_hw *adapter)
 111 {
 112         struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
 113         struct usb_host_interface *iface_desc;
 114         struct usb_endpoint_descriptor *endpoint;
 115         __le16 buffer_size;
 116         int ii, bin_found = 0, bout_found = 0;
 117
 118         iface_desc = interface->cur_altsetting;
 119
 120         for (ii = 0; ii < iface_desc->desc.bNumEndpoints; ++ii) {
 121                 endpoint = &(iface_desc->endpoint[ii].desc);
 122
 123                 if (!dev->bulkin_endpoint_addr[bin_found] &&
 124                     (endpoint->bEndpointAddress & USB_DIR_IN) &&
 125                     ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
 126                     USB_ENDPOINT_XFER_BULK)) {
 127                         buffer_size = endpoint->wMaxPacketSize;
 128                         dev->bulkin_size[bin_found] = buffer_size;
 129                         dev->bulkin_endpoint_addr[bin_found] =
 130                                 endpoint->bEndpointAddress;
 131                         bin_found++;
 132                 }
 133
 134                 if (!dev->bulkout_endpoint_addr[bout_found] &&
 135                     !(endpoint->bEndpointAddress & USB_DIR_IN) &&
 136                     ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
 137                     USB_ENDPOINT_XFER_BULK)) {
 138                         buffer_size = endpoint->wMaxPacketSize;
 139                         dev->bulkout_endpoint_addr[bout_found] =
 140                                 endpoint->bEndpointAddress;
 141                         dev->bulkout_size[bout_found] = buffer_size;
 142                         bout_found++;
 143                 }
 144
 145                 if (bin_found >= MAX_BULK_EP || bout_found >= MAX_BULK_EP)
 146                         break;
 147         }
 148
 149         if (!(dev->bulkin_endpoint_addr[0] && dev->bulkout_endpoint_addr[0])) {
 150                 dev_err(&interface->dev, "missing wlan bulk endpoints\n");
 151                 return -EINVAL;
 152         }
 153
 154         if (adapter->priv->coex_mode > 1) {
 155                 if (!dev->bulkin_endpoint_addr[1]) {
 156                         dev_err(&interface->dev, "missing bt bulk-in endpoint\n");
 157                         return -EINVAL;
 158                 }
 159         }
 160
 161         return 0;
 162 }
 163
 164 #define RSI_USB_REQ_OUT (USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE)
 165 #define RSI_USB_REQ_IN  (USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE)
 166
 167 /* rsi_usb_reg_read() - This function reads data from given register address.
 168  * @usbdev: Pointer to the usb_device structure.
 169  * @reg: Address of the register to be read.
 170  * @value: Value to be read.
 171  * @len: length of data to be read.
 172  *
 173  * Return: status: 0 on success, a negative error code on failure.
 174  */
 175 static int rsi_usb_reg_read(struct usb_device *usbdev,
 176                             u32 reg,
 177                             u16 *value,
 178                             u16 len)
 179 {
 180         u8 *buf;
 181         int status = -ENOMEM;
 182
 183         if (len > RSI_USB_CTRL_BUF_SIZE)
 184                 return -EINVAL;
 185
 186         buf  = kmalloc(RSI_USB_CTRL_BUF_SIZE, GFP_KERNEL);
 187         if (!buf)
 188                 return status;
 189
 190         status = usb_control_msg(usbdev,
 191                                  usb_rcvctrlpipe(usbdev, 0),
 192                                  USB_VENDOR_REGISTER_READ,
 193                                  RSI_USB_REQ_IN,
 194                                  ((reg & 0xffff0000) >> 16), (reg & 0xffff),
 195                                  (void *)buf,
 196                                  len,
 197                                  USB_CTRL_GET_TIMEOUT);
 198
 199         *value = (buf[0] | (buf[1] << 8));
 200         if (status < 0) {
 201                 rsi_dbg(ERR_ZONE,
 202                         "%s: Reg read failed with error code :%d\n",
 203                         __func__, status);
 204         }
 205         kfree(buf);
 206
 207         return status;
 208 }
 209
 210 /**
 211  * rsi_usb_reg_write() - This function writes the given data into the given
 212  *                       register address.
 213  * @usbdev: Pointer to the usb_device structure.
 214  * @reg: Address of the register.
 215  * @value: Value to write.
 216  * @len: Length of data to be written.
 217  *
 218  * Return: status: 0 on success, a negative error code on failure.
 219  */
 220 static int rsi_usb_reg_write(struct usb_device *usbdev,
 221                              u32 reg,
 222                              u32 value,
 223                              u16 len)
 224 {
 225         u8 *usb_reg_buf;
 226         int status = -ENOMEM;
 227
 228         if (len > RSI_USB_CTRL_BUF_SIZE)
 229                 return -EINVAL;
 230
 231         usb_reg_buf  = kmalloc(RSI_USB_CTRL_BUF_SIZE, GFP_KERNEL);
 232         if (!usb_reg_buf)
 233                 return status;
 234
 235         usb_reg_buf[0] = (cpu_to_le32(value) & 0x00ff);
 236         usb_reg_buf[1] = (cpu_to_le32(value) & 0xff00) >> 8;
 237         usb_reg_buf[2] = (cpu_to_le32(value) & 0x00ff0000) >> 16;
 238         usb_reg_buf[3] = (cpu_to_le32(value) & 0xff000000) >> 24;
 239
 240         status = usb_control_msg(usbdev,
 241                                  usb_sndctrlpipe(usbdev, 0),
 242                                  USB_VENDOR_REGISTER_WRITE,
 243                                  RSI_USB_REQ_OUT,
 244                                  ((cpu_to_le32(reg) & 0xffff0000) >> 16),
 245                                  (cpu_to_le32(reg) & 0xffff),
 246                                  (void *)usb_reg_buf,
 247                                  len,
 248                                  USB_CTRL_SET_TIMEOUT);
 249         if (status < 0) {
 250                 rsi_dbg(ERR_ZONE,
 251                         "%s: Reg write failed with error code :%d\n",
 252                         __func__, status);
 253         }
 254         kfree(usb_reg_buf);
 255
 256         return status;
 257 }
 258
 259 /**
 260  * rsi_rx_done_handler() - This function is called when a packet is received
 261  *                         from USB stack. This is callback to receive done.
 262  * @urb: Received URB.
 263  *
 264  * Return: None.
 265  */
 266 static void rsi_rx_done_handler(struct urb *urb)
 267 {
 268         struct rx_usb_ctrl_block *rx_cb = urb->context;
 269         struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)rx_cb->data;
 270         int status = -EINVAL;
 271
 272         if (!rx_cb->rx_skb)
 273                 return;
 274
 275         if (urb->status) {
 276                 dev_kfree_skb(rx_cb->rx_skb);
 277                 rx_cb->rx_skb = NULL;
 278                 return;
 279         }
 280
 281         if (urb->actual_length <= 0 ||
 282             urb->actual_length > rx_cb->rx_skb->len) {
 283                 rsi_dbg(INFO_ZONE, "%s: Invalid packet length = %d\n",
 284                         __func__, urb->actual_length);
 285                 goto out;
 286         }
 287         if (skb_queue_len(&dev->rx_q) >= RSI_MAX_RX_PKTS) {
 288                 rsi_dbg(INFO_ZONE, "Max RX packets reached\n");
 289                 goto out;
 290         }
 291         skb_trim(rx_cb->rx_skb, urb->actual_length);
 292         skb_queue_tail(&dev->rx_q, rx_cb->rx_skb);
 293
 294         rsi_set_event(&dev->rx_thread.event);
 295         status = 0;
 296
 297 out:
 298         if (rsi_rx_urb_submit(dev->priv, rx_cb->ep_num, GFP_ATOMIC))
 299                 rsi_dbg(ERR_ZONE, "%s: Failed in urb submission", __func__);
 300
 301         if (status) {
 302                 dev_kfree_skb(rx_cb->rx_skb);
 303                 rx_cb->rx_skb = NULL;
 304         }
 305 }
 306
 307 static void rsi_rx_urb_kill(struct rsi_hw *adapter, u8 ep_num)
 308 {
 309         struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
 310         struct rx_usb_ctrl_block *rx_cb = &dev->rx_cb[ep_num - 1];
 311         struct urb *urb = rx_cb->rx_urb;
 312
 313         usb_kill_urb(urb);
 314 }
 315
 316 /**
 317  * rsi_rx_urb_submit() - This function submits the given URB to the USB stack.
 318  * @adapter: Pointer to the adapter structure.
 319  * @ep_num: Endpoint number.
 320  * @mem_flags: The type of memory to allocate.
 321  *
 322  * Return: 0 on success, a negative error code on failure.
 323  */
 324 static int rsi_rx_urb_submit(struct rsi_hw *adapter, u8 ep_num, gfp_t mem_flags)
 325 {
 326         struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
 327         struct rx_usb_ctrl_block *rx_cb = &dev->rx_cb[ep_num - 1];
 328         struct urb *urb = rx_cb->rx_urb;
 329         int status;
 330         struct sk_buff *skb;
 331         u8 dword_align_bytes = 0;
 332
 333         skb = dev_alloc_skb(RSI_MAX_RX_USB_PKT_SIZE);
 334         if (!skb)
 335                 return -ENOMEM;
 336         skb_reserve(skb, MAX_DWORD_ALIGN_BYTES);
 337         skb_put(skb, RSI_MAX_RX_USB_PKT_SIZE - MAX_DWORD_ALIGN_BYTES);
 338         dword_align_bytes = (unsigned long)skb->data & 0x3f;
 339         if (dword_align_bytes > 0)
 340                 skb_push(skb, dword_align_bytes);
 341         urb->transfer_buffer = skb->data;
 342         rx_cb->rx_skb = skb;
 343
 344         usb_fill_bulk_urb(urb,
 345                           dev->usbdev,
 346                           usb_rcvbulkpipe(dev->usbdev,
 347                           dev->bulkin_endpoint_addr[ep_num - 1]),
 348                           urb->transfer_buffer,
 349                           skb->len,
 350                           rsi_rx_done_handler,
 351                           rx_cb);
 352
 353         status = usb_submit_urb(urb, mem_flags);
 354         if (status) {
 355                 rsi_dbg(ERR_ZONE, "%s: Failed in urb submission\n", __func__);
 356                 dev_kfree_skb(skb);
 357         }
 358
 359         return status;
 360 }
 361
 362 static int rsi_usb_read_register_multiple(struct rsi_hw *adapter, u32 addr,
 363                                           u8 *data, u16 count)
 364 {
 365         struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
 366         u8 *buf;
 367         u16 transfer;
 368         int status;
 369
 370         if (!addr)
 371                 return -EINVAL;
 372
 373         buf = kzalloc(RSI_USB_BUF_SIZE, GFP_KERNEL);
 374         if (!buf)
 375                 return -ENOMEM;
 376
 377         while (count) {
 378                 transfer = min_t(u16, count, RSI_USB_BUF_SIZE);
 379                 status = usb_control_msg(dev->usbdev,
 380                                          usb_rcvctrlpipe(dev->usbdev, 0),
 381                                          USB_VENDOR_REGISTER_READ,
 382                                          RSI_USB_REQ_IN,
 383                                          ((addr & 0xffff0000) >> 16),
 384                                          (addr & 0xffff), (void *)buf,
 385                                          transfer, USB_CTRL_GET_TIMEOUT);
 386                 if (status < 0) {
 387                         rsi_dbg(ERR_ZONE,
 388                                 "Reg read failed with error code :%d\n",
 389                                  status);
 390                         kfree(buf);
 391                         return status;
 392                 }
 393                 memcpy(data, buf, transfer);
 394                 count -= transfer;
 395                 data += transfer;
 396                 addr += transfer;
 397         }
 398         kfree(buf);
 399         return 0;
 400 }
 401
 402 /**
 403  * rsi_usb_write_register_multiple() - This function writes multiple bytes of
 404  *                                     information to multiple registers.
 405  * @adapter: Pointer to the adapter structure.
 406  * @addr: Address of the register.
 407  * @data: Pointer to the data that has to be written.
 408  * @count: Number of multiple bytes to be written on to the registers.
 409  *
 410  * Return: status: 0 on success, a negative error code on failure.
 411  */
 412 static int rsi_usb_write_register_multiple(struct rsi_hw *adapter, u32 addr,
 413                                            u8 *data, u16 count)
 414 {
 415         struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
 416         u8 *buf;
 417         u16 transfer;
 418         int status = 0;
 419
 420         buf = kzalloc(RSI_USB_BUF_SIZE, GFP_KERNEL);
 421         if (!buf)
 422                 return -ENOMEM;
 423
 424         while (count) {
 425                 transfer = min_t(u16, count, RSI_USB_BUF_SIZE);
 426                 memcpy(buf, data, transfer);
 427                 status = usb_control_msg(dev->usbdev,
 428                                          usb_sndctrlpipe(dev->usbdev, 0),
 429                                          USB_VENDOR_REGISTER_WRITE,
 430                                          RSI_USB_REQ_OUT,
 431                                          ((addr & 0xffff0000) >> 16),
 432                                          (addr & 0xffff),
 433                                          (void *)buf,
 434                                          transfer,
 435                                          USB_CTRL_SET_TIMEOUT);
 436                 if (status < 0) {
 437                         rsi_dbg(ERR_ZONE,
 438                                 "Reg write failed with error code :%d\n",
 439                                 status);
 440                         kfree(buf);
 441                         return status;
 442                 }
 443                 count -= transfer;
 444                 data += transfer;
 445                 addr += transfer;
 446         }
 447
 448         kfree(buf);
 449         return 0;
 450 }
 451
 452 /**
 453  *rsi_usb_host_intf_write_pkt() - This function writes the packet to the
 454  *                                 USB card.
 455  * @adapter: Pointer to the adapter structure.
 456  * @pkt: Pointer to the data to be written on to the card.
 457  * @len: Length of the data to be written on to the card.
 458  *
 459  * Return: 0 on success, a negative error code on failure.
 460  */
 461 static int rsi_usb_host_intf_write_pkt(struct rsi_hw *adapter,
 462                                        u8 *pkt,
 463                                        u32 len)
 464 {
 465         u32 queueno = ((pkt[1] >> 4) & 0x7);
 466         u8 endpoint;
 467
 468         endpoint = ((queueno == RSI_WIFI_MGMT_Q || queueno == RSI_WIFI_DATA_Q ||
 469                      queueno == RSI_COEX_Q) ? WLAN_EP : BT_EP);
 470
 471         return rsi_write_multiple(adapter,
 472                                   endpoint,
 473                                   (u8 *)pkt,
 474                                   len);
 475 }
 476
 477 static int rsi_usb_master_reg_read(struct rsi_hw *adapter, u32 reg,
 478                                    u32 *value, u16 len)
 479 {
 480         struct usb_device *usbdev =
 481                 ((struct rsi_91x_usbdev *)adapter->rsi_dev)->usbdev;
 482         u16 temp;
 483         int ret;
 484
 485         ret = rsi_usb_reg_read(usbdev, reg, &temp, len);
 486         if (ret < 0)
 487                 return ret;
 488         *value = temp;
 489
 490         return 0;
 491 }
 492
 493 static int rsi_usb_master_reg_write(struct rsi_hw *adapter,
 494                                     unsigned long reg,
 495                                     unsigned long value, u16 len)
 496 {
 497         struct usb_device *usbdev =
 498                 ((struct rsi_91x_usbdev *)adapter->rsi_dev)->usbdev;
 499
 500         return rsi_usb_reg_write(usbdev, reg, value, len);
 501 }
 502
 503 static int rsi_usb_load_data_master_write(struct rsi_hw *adapter,
 504                                           u32 base_address,
 505                                           u32 instructions_sz, u16 block_size,
 506                                           u8 *ta_firmware)
 507 {
 508         u16 num_blocks;
 509         u32 cur_indx, i;
 510         u8 temp_buf[256];
 511         int status;
 512
 513         num_blocks = instructions_sz / block_size;
 514         rsi_dbg(INFO_ZONE, "num_blocks: %d\n", num_blocks);
 515
 516         for (cur_indx = 0, i = 0; i < num_blocks; i++, cur_indx += block_size) {
 517                 memcpy(temp_buf, ta_firmware + cur_indx, block_size);
 518                 status = rsi_usb_write_register_multiple(adapter, base_address,
 519                                                          (u8 *)(temp_buf),
 520                                                          block_size);
 521                 if (status < 0)
 522                         return status;
 523
 524                 rsi_dbg(INFO_ZONE, "%s: loading block: %d\n", __func__, i);
 525                 base_address += block_size;
 526         }
 527
 528         if (instructions_sz % block_size) {
 529                 memset(temp_buf, 0, block_size);
 530                 memcpy(temp_buf, ta_firmware + cur_indx,
 531                        instructions_sz % block_size);
 532                 status = rsi_usb_write_register_multiple
 533                                                 (adapter, base_address,
 534                                                  (u8 *)temp_buf,
 535                                                  instructions_sz % block_size);
 536                 if (status < 0)
 537                         return status;
 538                 rsi_dbg(INFO_ZONE,
 539                         "Written Last Block in Address 0x%x Successfully\n",
 540                         cur_indx);
 541         }
 542         return 0;
 543 }
 544
 545 static struct rsi_host_intf_ops usb_host_intf_ops = {
 546         .write_pkt              = rsi_usb_host_intf_write_pkt,
 547         .read_reg_multiple      = rsi_usb_read_register_multiple,
 548         .write_reg_multiple     = rsi_usb_write_register_multiple,
 549         .master_reg_read        = rsi_usb_master_reg_read,
 550         .master_reg_write       = rsi_usb_master_reg_write,
 551         .load_data_master_write = rsi_usb_load_data_master_write,
 552 };
 553
 554 /**
 555  * rsi_deinit_usb_interface() - This function deinitializes the usb interface.
 556  * @adapter: Pointer to the adapter structure.
 557  *
 558  * Return: None.
 559  */
 560 static void rsi_deinit_usb_interface(struct rsi_hw *adapter)
 561 {
 562         struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
 563
 564         rsi_kill_thread(&dev->rx_thread);
 565
 566         usb_free_urb(dev->rx_cb[0].rx_urb);
 567         if (adapter->priv->coex_mode > 1)
 568                 usb_free_urb(dev->rx_cb[1].rx_urb);
 569
 570         kfree(dev->tx_buffer);
 571 }
 572
 573 static int rsi_usb_init_rx(struct rsi_hw *adapter)
 574 {
 575         struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
 576         struct rx_usb_ctrl_block *rx_cb;
 577         u8 idx, num_rx_cb;
 578
 579         num_rx_cb = (adapter->priv->coex_mode > 1 ? 2 : 1);
 580
 581         for (idx = 0; idx < num_rx_cb; idx++) {
 582                 rx_cb = &dev->rx_cb[idx];
 583
 584                 rx_cb->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 585                 if (!rx_cb->rx_urb) {
 586                         rsi_dbg(ERR_ZONE, "Failed alloc rx urb[%d]\n", idx);
 587                         goto err;
 588                 }
 589                 rx_cb->ep_num = idx + 1;
 590                 rx_cb->data = (void *)dev;
 591         }
 592         skb_queue_head_init(&dev->rx_q);
 593         rsi_init_event(&dev->rx_thread.event);
 594         if (rsi_create_kthread(adapter->priv, &dev->rx_thread,
 595                                rsi_usb_rx_thread, "RX-Thread")) {
 596                 rsi_dbg(ERR_ZONE, "%s: Unable to init rx thrd\n", __func__);
 597                 goto err;
 598         }
 599
 600         return 0;
 601
 602 err:
 603         usb_free_urb(dev->rx_cb[0].rx_urb);
 604         if (adapter->priv->coex_mode > 1)
 605                 usb_free_urb(dev->rx_cb[1].rx_urb);
 606
 607         return -1;
 608 }
 609
 610 /**
 611  * rsi_init_usb_interface() - This function initializes the usb interface.
 612  * @adapter: Pointer to the adapter structure.
 613  * @pfunction: Pointer to USB interface structure.
 614  *
 615  * Return: 0 on success, a negative error code on failure.
 616  */
 617 static int rsi_init_usb_interface(struct rsi_hw *adapter,
 618                                   struct usb_interface *pfunction)
 619 {
 620         struct rsi_91x_usbdev *rsi_dev;
 621         int status;
 622
 623         rsi_dev = kzalloc(sizeof(*rsi_dev), GFP_KERNEL);
 624         if (!rsi_dev)
 625                 return -ENOMEM;
 626
 627         adapter->rsi_dev = rsi_dev;
 628         rsi_dev->usbdev = interface_to_usbdev(pfunction);
 629         rsi_dev->priv = (void *)adapter;
 630
 631         if (rsi_find_bulk_in_and_out_endpoints(pfunction, adapter)) {
 632                 status = -EINVAL;
 633                 goto fail_eps;
 634         }
 635
 636         adapter->device = &pfunction->dev;
 637         usb_set_intfdata(pfunction, adapter);
 638
 639         rsi_dev->tx_buffer = kmalloc(2048, GFP_KERNEL);
 640         if (!rsi_dev->tx_buffer) {
 641                 status = -ENOMEM;
 642                 goto fail_eps;
 643         }
 644
 645         if (rsi_usb_init_rx(adapter)) {
 646                 rsi_dbg(ERR_ZONE, "Failed to init RX handle\n");
 647                 status = -ENOMEM;
 648                 goto fail_rx;
 649         }
 650
 651         rsi_dev->tx_blk_size = 252;
 652         adapter->block_size = rsi_dev->tx_blk_size;
 653
 654         /* Initializing function callbacks */
 655         adapter->check_hw_queue_status = rsi_usb_check_queue_status;
 656         adapter->determine_event_timeout = rsi_usb_event_timeout;
 657         adapter->rsi_host_intf = RSI_HOST_INTF_USB;
 658         adapter->host_intf_ops = &usb_host_intf_ops;
 659
 660 #ifdef CONFIG_RSI_DEBUGFS
 661         /* In USB, one less than the MAX_DEBUGFS_ENTRIES entries is required */
 662         adapter->num_debugfs_entries = (MAX_DEBUGFS_ENTRIES - 1);
 663 #endif
 664
 665         rsi_dbg(INIT_ZONE, "%s: Enabled the interface\n", __func__);
 666         return 0;
 667
 668 fail_rx:
 669         kfree(rsi_dev->tx_buffer);
 670
 671 fail_eps:
 672
 673         return status;
 674 }
 675
 676 static int usb_ulp_read_write(struct rsi_hw *adapter, u16 addr, u32 data,
 677                               u16 len_in_bits)
 678 {
 679         int ret;
 680
 681         ret = rsi_usb_master_reg_write
 682                         (adapter, RSI_GSPI_DATA_REG1,
 683                          ((addr << 6) | ((data >> 16) & 0xffff)), 2);
 684         if (ret < 0)
 685                 return ret;
 686
 687         ret = rsi_usb_master_reg_write(adapter, RSI_GSPI_DATA_REG0,
 688                                        (data & 0xffff), 2);
 689         if (ret < 0)
 690                 return ret;
 691
 692         /* Initializing GSPI for ULP read/writes */
 693         rsi_usb_master_reg_write(adapter, RSI_GSPI_CTRL_REG0,
 694                                  RSI_GSPI_CTRL_REG0_VALUE, 2);
 695
 696         ret = rsi_usb_master_reg_write(adapter, RSI_GSPI_CTRL_REG1,
 697                                        ((len_in_bits - 1) | RSI_GSPI_TRIG), 2);
 698         if (ret < 0)
 699                 return ret;
 700
 701         msleep(20);
 702
 703         return 0;
 704 }
 705
 706 static int rsi_reset_card(struct rsi_hw *adapter)
 707 {
 708         int ret;
 709
 710         rsi_dbg(INFO_ZONE, "Resetting Card...\n");
 711         rsi_usb_master_reg_write(adapter, RSI_TA_HOLD_REG, 0xE, 4);
 712
 713         /* This msleep will ensure Thread-Arch processor to go to hold
 714          * and any pending dma transfers to rf in device to finish.
 715          */
 716         msleep(100);
 717
 718         ret = rsi_usb_master_reg_write(adapter, SWBL_REGOUT,
 719                                        RSI_FW_WDT_DISABLE_REQ,
 720                                        RSI_COMMON_REG_SIZE);
 721         if (ret < 0) {
 722                 rsi_dbg(ERR_ZONE, "Disabling firmware watchdog timer failed\n");
 723                 goto fail;
 724         }
 725
 726         if (adapter->device_model != RSI_DEV_9116) {
 727                 ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_1,
 728                                          RSI_ULP_WRITE_2, 32);
 729                 if (ret < 0)
 730                         goto fail;
 731                 ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_2,
 732                                          RSI_ULP_WRITE_0, 32);
 733                 if (ret < 0)
 734                         goto fail;
 735                 ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_DELAY_TIMER_1,
 736                                          RSI_ULP_WRITE_50, 32);
 737                 if (ret < 0)
 738                         goto fail;
 739                 ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_DELAY_TIMER_2,
 740                                          RSI_ULP_WRITE_0, 32);
 741                 if (ret < 0)
 742                         goto fail;
 743                 ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_ENABLE,
 744                                          RSI_ULP_TIMER_ENABLE, 32);
 745                 if (ret < 0)
 746                         goto fail;
 747         } else {
 748                 ret = rsi_usb_master_reg_write(adapter,
 749                                                NWP_WWD_INTERRUPT_TIMER,
 750                                                NWP_WWD_INT_TIMER_CLKS,
 751                                                RSI_9116_REG_SIZE);
 752                 if (ret < 0)
 753                         goto fail;
 754                 ret = rsi_usb_master_reg_write(adapter,
 755                                                NWP_WWD_SYSTEM_RESET_TIMER,
 756                                                NWP_WWD_SYS_RESET_TIMER_CLKS,
 757                                                RSI_9116_REG_SIZE);
 758                 if (ret < 0)
 759                         goto fail;
 760                 ret = rsi_usb_master_reg_write(adapter,
 761                                                NWP_WWD_MODE_AND_RSTART,
 762                                                NWP_WWD_TIMER_DISABLE,
 763                                                RSI_9116_REG_SIZE);
 764                 if (ret < 0)
 765                         goto fail;
 766         }
 767
 768         rsi_dbg(INFO_ZONE, "Reset card done\n");
 769         return ret;
 770
 771 fail:
 772         rsi_dbg(ERR_ZONE, "Reset card failed\n");
 773         return ret;
 774 }
 775
 776 /**
 777  * rsi_probe() - This function is called by kernel when the driver provided
 778  *               Vendor and device IDs are matched. All the initialization
 779  *               work is done here.
 780  * @pfunction: Pointer to the USB interface structure.
 781  * @id: Pointer to the usb_device_id structure.
 782  *
 783  * Return: 0 on success, a negative error code on failure.
 784  */
 785 static int rsi_probe(struct usb_interface *pfunction,
 786                      const struct usb_device_id *id)
 787 {
 788         struct rsi_hw *adapter;
 789         struct rsi_91x_usbdev *dev;
 790         u16 fw_status;
 791         int status;
 792
 793         rsi_dbg(INIT_ZONE, "%s: Init function called\n", __func__);
 794
 795         adapter = rsi_91x_init(dev_oper_mode);
 796         if (!adapter) {
 797                 rsi_dbg(ERR_ZONE, "%s: Failed to init os intf ops\n",
 798                         __func__);
 799                 return -ENOMEM;
 800         }
 801         adapter->rsi_host_intf = RSI_HOST_INTF_USB;
 802
 803         status = rsi_init_usb_interface(adapter, pfunction);
 804         if (status) {
 805                 rsi_dbg(ERR_ZONE, "%s: Failed to init usb interface\n",
 806                         __func__);
 807                 goto err;
 808         }
 809
 810         rsi_dbg(ERR_ZONE, "%s: Initialized os intf ops\n", __func__);
 811
 812         if (id->idProduct == RSI_USB_PID_9113) {
 813                 rsi_dbg(INIT_ZONE, "%s: 9113 module detected\n", __func__);
 814                 adapter->device_model = RSI_DEV_9113;
 815         } else if (id->idProduct == RSI_USB_PID_9116) {
 816                 rsi_dbg(INIT_ZONE, "%s: 9116 module detected\n", __func__);
 817                 adapter->device_model = RSI_DEV_9116;
 818         } else {
 819                 rsi_dbg(ERR_ZONE, "%s: Unsupported RSI device id 0x%x\n",
 820                         __func__, id->idProduct);
 821                 status = -ENODEV;
 822                 goto err1;
 823         }
 824
 825         dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
 826
 827         status = rsi_usb_reg_read(dev->usbdev, FW_STATUS_REG, &fw_status, 2);
 828         if (status < 0)
 829                 goto err1;
 830         else
 831                 fw_status &= 1;
 832
 833         if (!fw_status) {
 834                 rsi_dbg(INIT_ZONE, "Loading firmware...\n");
 835                 status = rsi_hal_device_init(adapter);
 836                 if (status) {
 837                         rsi_dbg(ERR_ZONE, "%s: Failed in device init\n",
 838                                 __func__);
 839                         goto err1;
 840                 }
 841                 rsi_dbg(INIT_ZONE, "%s: Device Init Done\n", __func__);
 842         }
 843
 844         status = rsi_rx_urb_submit(adapter, WLAN_EP, GFP_KERNEL);
 845         if (status)
 846                 goto err1;
 847
 848         if (adapter->priv->coex_mode > 1) {
 849                 status = rsi_rx_urb_submit(adapter, BT_EP, GFP_KERNEL);
 850                 if (status)
 851                         goto err_kill_wlan_urb;
 852         }
 853
 854         return 0;
 855
 856 err_kill_wlan_urb:
 857         rsi_rx_urb_kill(adapter, WLAN_EP);
 858 err1:
 859         rsi_deinit_usb_interface(adapter);
 860 err:
 861         rsi_91x_deinit(adapter);
 862         rsi_dbg(ERR_ZONE, "%s: Failed in probe...Exiting\n", __func__);
 863         return status;
 864 }
 865
 866 /**
 867  * rsi_disconnect() - This function performs the reverse of the probe function,
 868  *                    it deinitialize the driver structure.
 869  * @pfunction: Pointer to the USB interface structure.
 870  *
 871  * Return: None.
 872  */
 873 static void rsi_disconnect(struct usb_interface *pfunction)
 874 {
 875         struct rsi_hw *adapter = usb_get_intfdata(pfunction);
 876
 877         if (!adapter)
 878                 return;
 879
 880         rsi_mac80211_detach(adapter);
 881
 882         if (IS_ENABLED(CONFIG_RSI_COEX) && adapter->priv->coex_mode > 1 &&
 883             adapter->priv->bt_adapter) {
 884                 rsi_bt_ops.detach(adapter->priv->bt_adapter);
 885                 adapter->priv->bt_adapter = NULL;
 886         }
 887
 888         if (adapter->priv->coex_mode > 1)
 889                 rsi_rx_urb_kill(adapter, BT_EP);
 890         rsi_rx_urb_kill(adapter, WLAN_EP);
 891
 892         rsi_reset_card(adapter);
 893         rsi_deinit_usb_interface(adapter);
 894         rsi_91x_deinit(adapter);
 895
 896         rsi_dbg(INFO_ZONE, "%s: Deinitialization completed\n", __func__);
 897 }
 898
 899 #ifdef CONFIG_PM
 900 static int rsi_suspend(struct usb_interface *intf, pm_message_t message)
 901 {
 902         /* Not yet implemented */
 903         return -ENOSYS;
 904 }
 905
 906 static int rsi_resume(struct usb_interface *intf)
 907 {
 908         /* Not yet implemented */
 909         return -ENOSYS;
 910 }
 911 #endif
 912
 913 static const struct usb_device_id rsi_dev_table[] = {
 914         { USB_DEVICE(RSI_USB_VENDOR_ID, RSI_USB_PID_9113) },
 915         { USB_DEVICE(RSI_USB_VENDOR_ID, RSI_USB_PID_9116) },
 916         { /* Blank */},
 917 };
 918
 919 static struct usb_driver rsi_driver = {
 920         .name       = "RSI-USB WLAN",
 921         .probe      = rsi_probe,
 922         .disconnect = rsi_disconnect,
 923         .id_table   = rsi_dev_table,
 924 #ifdef CONFIG_PM
 925         .suspend    = rsi_suspend,
 926         .resume     = rsi_resume,
 927 #endif
 928 };
 929
 930 module_usb_driver(rsi_driver);
 931
 932 MODULE_AUTHOR("Redpine Signals Inc");
 933 MODULE_DESCRIPTION("Common USB layer for RSI drivers");
 934 MODULE_DEVICE_TABLE(usb, rsi_dev_table);
 935 /*(DEBLOBBED)*/
 936 MODULE_VERSION("0.1");
 937 MODULE_LICENSE("Dual BSD/GPL");