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 <net/rsi_91x.h>
  20 #include "rsi_usb.h"
  21 #include "rsi_hal.h"
  22 #include "rsi_coex.h"
  23
  24 /* Default operating mode is wlan STA + BT */
  25 static u16 dev_oper_mode = DEV_OPMODE_STA_BT_DUAL;
  26 module_param(dev_oper_mode, ushort, 0444);
  27 MODULE_PARM_DESC(dev_oper_mode,
  28                  "1[Wi-Fi], 4[BT], 8[BT LE], 5[Wi-Fi STA + BT classic]\n"
  29                  "9[Wi-Fi STA + BT LE], 13[Wi-Fi STA + BT classic + BT LE]\n"
  30                  "6[AP + BT classic], 14[AP + BT classic + BT LE]");
  31
  32 static int rsi_rx_urb_submit(struct rsi_hw *adapter, u8 ep_num);
  33
  34 /**
  35  * rsi_usb_card_write() - This function writes to the USB Card.
  36  * @adapter: Pointer to the adapter structure.
  37  * @buf: Pointer to the buffer from where the data has to be taken.
  38  * @len: Length to be written.
  39  * @endpoint: Type of endpoint.
  40  *
  41  * Return: status: 0 on success, a negative error code on failure.
  42  */
  43 static int rsi_usb_card_write(struct rsi_hw *adapter,
  44                               u8 *buf,
  45                               u16 len,
  46                               u8 endpoint)
  47 {
  48         struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
  49         int status;
  50         u8 *seg = dev->tx_buffer;
  51         int transfer;
  52         int ep = dev->bulkout_endpoint_addr[endpoint - 1];
  53
  54         memset(seg, 0, len + RSI_USB_TX_HEAD_ROOM);
  55         memcpy(seg + RSI_USB_TX_HEAD_ROOM, buf, len);
  56         len += RSI_USB_TX_HEAD_ROOM;
  57         transfer = len;
  58         status = usb_bulk_msg(dev->usbdev,
  59                               usb_sndbulkpipe(dev->usbdev, ep),
  60                               (void *)seg,
  61                               (int)len,
  62                               &transfer,
  63                               HZ * 5);
  64
  65         if (status < 0) {
  66                 rsi_dbg(ERR_ZONE,
  67                         "Card write failed with error code :%10d\n", status);
  68                 dev->write_fail = 1;
  69         }
  70         return status;
  71 }
  72
  73 /**
  74  * rsi_write_multiple() - This function writes multiple bytes of information
  75  *                        to the USB card.
  76  * @adapter: Pointer to the adapter structure.
  77  * @addr: Address of the register.
  78  * @data: Pointer to the data that has to be written.
  79  * @count: Number of multiple bytes to be written.
  80  *
  81  * Return: 0 on success, a negative error code on failure.
  82  */
  83 static int rsi_write_multiple(struct rsi_hw *adapter,
  84                               u8 endpoint,
  85                               u8 *data,
  86                               u32 count)
  87 {
  88         struct rsi_91x_usbdev *dev;
  89
  90         if (!adapter)
  91                 return -ENODEV;
  92
  93         if (endpoint == 0)
  94                 return -EINVAL;
  95
  96         dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
  97         if (dev->write_fail)
  98                 return -ENETDOWN;
  99
 100         return rsi_usb_card_write(adapter, data, count, endpoint);
 101 }
 102
 103 /**
 104  * rsi_find_bulk_in_and_out_endpoints() - This function initializes the bulk
 105  *                                        endpoints to the device.
 106  * @interface: Pointer to the USB interface structure.
 107  * @adapter: Pointer to the adapter structure.
 108  *
 109  * Return: ret_val: 0 on success, -ENOMEM on failure.
 110  */
 111 static int rsi_find_bulk_in_and_out_endpoints(struct usb_interface *interface,
 112                                               struct rsi_hw *adapter)
 113 {
 114         struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
 115         struct usb_host_interface *iface_desc;
 116         struct usb_endpoint_descriptor *endpoint;
 117         __le16 buffer_size;
 118         int ii, bin_found = 0, bout_found = 0;
 119
 120         iface_desc = &(interface->altsetting[0]);
 121
 122         for (ii = 0; ii < iface_desc->desc.bNumEndpoints; ++ii) {
 123                 endpoint = &(iface_desc->endpoint[ii].desc);
 124
 125                 if (!dev->bulkin_endpoint_addr[bin_found] &&
 126                     (endpoint->bEndpointAddress & USB_DIR_IN) &&
 127                     ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
 128                     USB_ENDPOINT_XFER_BULK)) {
 129                         buffer_size = endpoint->wMaxPacketSize;
 130                         dev->bulkin_size[bin_found] = buffer_size;
 131                         dev->bulkin_endpoint_addr[bin_found] =
 132                                 endpoint->bEndpointAddress;
 133                         bin_found++;
 134                 }
 135
 136                 if (!dev->bulkout_endpoint_addr[bout_found] &&
 137                     !(endpoint->bEndpointAddress & USB_DIR_IN) &&
 138                     ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
 139                     USB_ENDPOINT_XFER_BULK)) {
 140                         buffer_size = endpoint->wMaxPacketSize;
 141                         dev->bulkout_endpoint_addr[bout_found] =
 142                                 endpoint->bEndpointAddress;
 143                         dev->bulkout_size[bout_found] = buffer_size;
 144                         bout_found++;
 145                 }
 146
 147                 if (bin_found >= MAX_BULK_EP || bout_found >= MAX_BULK_EP)
 148                         break;
 149         }
 150
 151         if (!(dev->bulkin_endpoint_addr[0]) &&
 152             dev->bulkout_endpoint_addr[0])
 153                 return -EINVAL;
 154
 155         return 0;
 156 }
 157
 158 #define RSI_USB_REQ_OUT (USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE)
 159 #define RSI_USB_REQ_IN  (USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE)
 160
 161 /* rsi_usb_reg_read() - This function reads data from given register address.
 162  * @usbdev: Pointer to the usb_device structure.
 163  * @reg: Address of the register to be read.
 164  * @value: Value to be read.
 165  * @len: length of data to be read.
 166  *
 167  * Return: status: 0 on success, a negative error code on failure.
 168  */
 169 static int rsi_usb_reg_read(struct usb_device *usbdev,
 170                             u32 reg,
 171                             u16 *value,
 172                             u16 len)
 173 {
 174         u8 *buf;
 175         int status = -ENOMEM;
 176
 177         if (len > RSI_USB_CTRL_BUF_SIZE)
 178                 return -EINVAL;
 179
 180         buf  = kmalloc(RSI_USB_CTRL_BUF_SIZE, GFP_KERNEL);
 181         if (!buf)
 182                 return status;
 183
 184         status = usb_control_msg(usbdev,
 185                                  usb_rcvctrlpipe(usbdev, 0),
 186                                  USB_VENDOR_REGISTER_READ,
 187                                  RSI_USB_REQ_IN,
 188                                  ((reg & 0xffff0000) >> 16), (reg & 0xffff),
 189                                  (void *)buf,
 190                                  len,
 191                                  USB_CTRL_GET_TIMEOUT);
 192
 193         *value = (buf[0] | (buf[1] << 8));
 194         if (status < 0) {
 195                 rsi_dbg(ERR_ZONE,
 196                         "%s: Reg read failed with error code :%d\n",
 197                         __func__, status);
 198         }
 199         kfree(buf);
 200
 201         return status;
 202 }
 203
 204 /**
 205  * rsi_usb_reg_write() - This function writes the given data into the given
 206  *                       register address.
 207  * @usbdev: Pointer to the usb_device structure.
 208  * @reg: Address of the register.
 209  * @value: Value to write.
 210  * @len: Length of data to be written.
 211  *
 212  * Return: status: 0 on success, a negative error code on failure.
 213  */
 214 static int rsi_usb_reg_write(struct usb_device *usbdev,
 215                              u32 reg,
 216                              u16 value,
 217                              u16 len)
 218 {
 219         u8 *usb_reg_buf;
 220         int status = -ENOMEM;
 221
 222         if (len > RSI_USB_CTRL_BUF_SIZE)
 223                 return -EINVAL;
 224
 225         usb_reg_buf  = kmalloc(RSI_USB_CTRL_BUF_SIZE, GFP_KERNEL);
 226         if (!usb_reg_buf)
 227                 return status;
 228
 229         usb_reg_buf[0] = (value & 0x00ff);
 230         usb_reg_buf[1] = (value & 0xff00) >> 8;
 231         usb_reg_buf[2] = 0x0;
 232         usb_reg_buf[3] = 0x0;
 233
 234         status = usb_control_msg(usbdev,
 235                                  usb_sndctrlpipe(usbdev, 0),
 236                                  USB_VENDOR_REGISTER_WRITE,
 237                                  RSI_USB_REQ_OUT,
 238                                  ((reg & 0xffff0000) >> 16),
 239                                  (reg & 0xffff),
 240                                  (void *)usb_reg_buf,
 241                                  len,
 242                                  USB_CTRL_SET_TIMEOUT);
 243         if (status < 0) {
 244                 rsi_dbg(ERR_ZONE,
 245                         "%s: Reg write failed with error code :%d\n",
 246                         __func__, status);
 247         }
 248         kfree(usb_reg_buf);
 249
 250         return status;
 251 }
 252
 253 /**
 254  * rsi_rx_done_handler() - This function is called when a packet is received
 255  *                         from USB stack. This is callback to recieve done.
 256  * @urb: Received URB.
 257  *
 258  * Return: None.
 259  */
 260 static void rsi_rx_done_handler(struct urb *urb)
 261 {
 262         struct rx_usb_ctrl_block *rx_cb = urb->context;
 263         struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)rx_cb->data;
 264         int status = -EINVAL;
 265
 266         if (urb->status)
 267                 goto out;
 268
 269         if (urb->actual_length <= 0) {
 270                 rsi_dbg(INFO_ZONE, "%s: Zero length packet\n", __func__);
 271                 goto out;
 272         }
 273         if (skb_queue_len(&dev->rx_q) >= RSI_MAX_RX_PKTS) {
 274                 rsi_dbg(INFO_ZONE, "Max RX packets reached\n");
 275                 goto out;
 276         }
 277         skb_put(rx_cb->rx_skb, urb->actual_length);
 278         skb_queue_tail(&dev->rx_q, rx_cb->rx_skb);
 279
 280         rsi_set_event(&dev->rx_thread.event);
 281         status = 0;
 282
 283 out:
 284         if (rsi_rx_urb_submit(dev->priv, rx_cb->ep_num))
 285                 rsi_dbg(ERR_ZONE, "%s: Failed in urb submission", __func__);
 286
 287         if (status)
 288                 dev_kfree_skb(rx_cb->rx_skb);
 289 }
 290
 291 /**
 292  * rsi_rx_urb_submit() - This function submits the given URB to the USB stack.
 293  * @adapter: Pointer to the adapter structure.
 294  *
 295  * Return: 0 on success, a negative error code on failure.
 296  */
 297 static int rsi_rx_urb_submit(struct rsi_hw *adapter, u8 ep_num)
 298 {
 299         struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
 300         struct rx_usb_ctrl_block *rx_cb = &dev->rx_cb[ep_num - 1];
 301         struct urb *urb = rx_cb->rx_urb;
 302         int status;
 303         struct sk_buff *skb;
 304         u8 dword_align_bytes = 0;
 305
 306 #define RSI_MAX_RX_USB_PKT_SIZE 3000
 307         skb = dev_alloc_skb(RSI_MAX_RX_USB_PKT_SIZE);
 308         if (!skb)
 309                 return -ENOMEM;
 310         skb_reserve(skb, MAX_DWORD_ALIGN_BYTES);
 311         dword_align_bytes = (unsigned long)skb->data & 0x3f;
 312         if (dword_align_bytes > 0)
 313                 skb_push(skb, dword_align_bytes);
 314         urb->transfer_buffer = skb->data;
 315         rx_cb->rx_skb = skb;
 316
 317         usb_fill_bulk_urb(urb,
 318                           dev->usbdev,
 319                           usb_rcvbulkpipe(dev->usbdev,
 320                           dev->bulkin_endpoint_addr[ep_num - 1]),
 321                           urb->transfer_buffer,
 322                           RSI_MAX_RX_USB_PKT_SIZE,
 323                           rsi_rx_done_handler,
 324                           rx_cb);
 325
 326         status = usb_submit_urb(urb, GFP_KERNEL);
 327         if (status)
 328                 rsi_dbg(ERR_ZONE, "%s: Failed in urb submission\n", __func__);
 329
 330         return status;
 331 }
 332
 333 static int rsi_usb_read_register_multiple(struct rsi_hw *adapter, u32 addr,
 334                                           u8 *data, u16 count)
 335 {
 336         struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
 337         u8 *buf;
 338         u16 transfer;
 339         int status;
 340
 341         if (!addr)
 342                 return -EINVAL;
 343
 344         buf = kzalloc(RSI_USB_BUF_SIZE, GFP_KERNEL);
 345         if (!buf)
 346                 return -ENOMEM;
 347
 348         while (count) {
 349                 transfer = min_t(u16, count, RSI_USB_BUF_SIZE);
 350                 status = usb_control_msg(dev->usbdev,
 351                                          usb_rcvctrlpipe(dev->usbdev, 0),
 352                                          USB_VENDOR_REGISTER_READ,
 353                                          RSI_USB_REQ_IN,
 354                                          ((addr & 0xffff0000) >> 16),
 355                                          (addr & 0xffff), (void *)buf,
 356                                          transfer, USB_CTRL_GET_TIMEOUT);
 357                 if (status < 0) {
 358                         rsi_dbg(ERR_ZONE,
 359                                 "Reg read failed with error code :%d\n",
 360                                  status);
 361                         kfree(buf);
 362                         return status;
 363                 }
 364                 memcpy(data, buf, transfer);
 365                 count -= transfer;
 366                 data += transfer;
 367                 addr += transfer;
 368         }
 369         kfree(buf);
 370         return 0;
 371 }
 372
 373 /**
 374  * rsi_usb_write_register_multiple() - This function writes multiple bytes of
 375  *                                     information to multiple registers.
 376  * @adapter: Pointer to the adapter structure.
 377  * @addr: Address of the register.
 378  * @data: Pointer to the data that has to be written.
 379  * @count: Number of multiple bytes to be written on to the registers.
 380  *
 381  * Return: status: 0 on success, a negative error code on failure.
 382  */
 383 static int rsi_usb_write_register_multiple(struct rsi_hw *adapter, u32 addr,
 384                                            u8 *data, u16 count)
 385 {
 386         struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
 387         u8 *buf;
 388         u16 transfer;
 389         int status = 0;
 390
 391         buf = kzalloc(RSI_USB_BUF_SIZE, GFP_KERNEL);
 392         if (!buf)
 393                 return -ENOMEM;
 394
 395         while (count) {
 396                 transfer = min_t(u16, count, RSI_USB_BUF_SIZE);
 397                 memcpy(buf, data, transfer);
 398                 status = usb_control_msg(dev->usbdev,
 399                                          usb_sndctrlpipe(dev->usbdev, 0),
 400                                          USB_VENDOR_REGISTER_WRITE,
 401                                          RSI_USB_REQ_OUT,
 402                                          ((addr & 0xffff0000) >> 16),
 403                                          (addr & 0xffff),
 404                                          (void *)buf,
 405                                          transfer,
 406                                          USB_CTRL_SET_TIMEOUT);
 407                 if (status < 0) {
 408                         rsi_dbg(ERR_ZONE,
 409                                 "Reg write failed with error code :%d\n",
 410                                 status);
 411                         kfree(buf);
 412                         return status;
 413                 }
 414                 count -= transfer;
 415                 data += transfer;
 416                 addr += transfer;
 417         }
 418
 419         kfree(buf);
 420         return 0;
 421 }
 422
 423 /**
 424  *rsi_usb_host_intf_write_pkt() - This function writes the packet to the
 425  *                                 USB card.
 426  * @adapter: Pointer to the adapter structure.
 427  * @pkt: Pointer to the data to be written on to the card.
 428  * @len: Length of the data to be written on to the card.
 429  *
 430  * Return: 0 on success, a negative error code on failure.
 431  */
 432 static int rsi_usb_host_intf_write_pkt(struct rsi_hw *adapter,
 433                                        u8 *pkt,
 434                                        u32 len)
 435 {
 436         u32 queueno = ((pkt[1] >> 4) & 0x7);
 437         u8 endpoint;
 438
 439         endpoint = ((queueno == RSI_WIFI_MGMT_Q || queueno == RSI_WIFI_DATA_Q ||
 440                      queueno == RSI_COEX_Q) ? WLAN_EP : BT_EP);
 441
 442         return rsi_write_multiple(adapter,
 443                                   endpoint,
 444                                   (u8 *)pkt,
 445                                   len);
 446 }
 447
 448 static int rsi_usb_master_reg_read(struct rsi_hw *adapter, u32 reg,
 449                                    u32 *value, u16 len)
 450 {
 451         struct usb_device *usbdev =
 452                 ((struct rsi_91x_usbdev *)adapter->rsi_dev)->usbdev;
 453         u16 temp;
 454         int ret;
 455
 456         ret = rsi_usb_reg_read(usbdev, reg, &temp, len);
 457         if (ret < 0)
 458                 return ret;
 459         *value = temp;
 460
 461         return 0;
 462 }
 463
 464 static int rsi_usb_master_reg_write(struct rsi_hw *adapter,
 465                                     unsigned long reg,
 466                                     unsigned long value, u16 len)
 467 {
 468         struct usb_device *usbdev =
 469                 ((struct rsi_91x_usbdev *)adapter->rsi_dev)->usbdev;
 470
 471         return rsi_usb_reg_write(usbdev, reg, value, len);
 472 }
 473
 474 static int rsi_usb_load_data_master_write(struct rsi_hw *adapter,
 475                                           u32 base_address,
 476                                           u32 instructions_sz, u16 block_size,
 477                                           u8 *ta_firmware)
 478 {
 479         u16 num_blocks;
 480         u32 cur_indx, i;
 481         u8 temp_buf[256];
 482         int status;
 483
 484         num_blocks = instructions_sz / block_size;
 485         rsi_dbg(INFO_ZONE, "num_blocks: %d\n", num_blocks);
 486
 487         for (cur_indx = 0, i = 0; i < num_blocks; i++, cur_indx += block_size) {
 488                 memcpy(temp_buf, ta_firmware + cur_indx, block_size);
 489                 status = rsi_usb_write_register_multiple(adapter, base_address,
 490                                                          (u8 *)(temp_buf),
 491                                                          block_size);
 492                 if (status < 0)
 493                         return status;
 494
 495                 rsi_dbg(INFO_ZONE, "%s: loading block: %d\n", __func__, i);
 496                 base_address += block_size;
 497         }
 498
 499         if (instructions_sz % block_size) {
 500                 memset(temp_buf, 0, block_size);
 501                 memcpy(temp_buf, ta_firmware + cur_indx,
 502                        instructions_sz % block_size);
 503                 status = rsi_usb_write_register_multiple
 504                                                 (adapter, base_address,
 505                                                  (u8 *)temp_buf,
 506                                                  instructions_sz % block_size);
 507                 if (status < 0)
 508                         return status;
 509                 rsi_dbg(INFO_ZONE,
 510                         "Written Last Block in Address 0x%x Successfully\n",
 511                         cur_indx);
 512         }
 513         return 0;
 514 }
 515
 516 static struct rsi_host_intf_ops usb_host_intf_ops = {
 517         .write_pkt              = rsi_usb_host_intf_write_pkt,
 518         .read_reg_multiple      = rsi_usb_read_register_multiple,
 519         .write_reg_multiple     = rsi_usb_write_register_multiple,
 520         .master_reg_read        = rsi_usb_master_reg_read,
 521         .master_reg_write       = rsi_usb_master_reg_write,
 522         .load_data_master_write = rsi_usb_load_data_master_write,
 523 };
 524
 525 /**
 526  * rsi_deinit_usb_interface() - This function deinitializes the usb interface.
 527  * @adapter: Pointer to the adapter structure.
 528  *
 529  * Return: None.
 530  */
 531 static void rsi_deinit_usb_interface(struct rsi_hw *adapter)
 532 {
 533         struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
 534
 535         rsi_kill_thread(&dev->rx_thread);
 536
 537         usb_free_urb(dev->rx_cb[0].rx_urb);
 538         if (adapter->priv->coex_mode > 1)
 539                 usb_free_urb(dev->rx_cb[1].rx_urb);
 540
 541         kfree(dev->tx_buffer);
 542 }
 543
 544 static int rsi_usb_init_rx(struct rsi_hw *adapter)
 545 {
 546         struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
 547         struct rx_usb_ctrl_block *rx_cb;
 548         u8 idx, num_rx_cb;
 549
 550         num_rx_cb = (adapter->priv->coex_mode > 1 ? 2 : 1);
 551
 552         for (idx = 0; idx < num_rx_cb; idx++) {
 553                 rx_cb = &dev->rx_cb[idx];
 554
 555                 rx_cb->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 556                 if (!rx_cb->rx_urb) {
 557                         rsi_dbg(ERR_ZONE, "Failed alloc rx urb[%d]\n", idx);
 558                         goto err;
 559                 }
 560                 rx_cb->ep_num = idx + 1;
 561                 rx_cb->data = (void *)dev;
 562         }
 563         skb_queue_head_init(&dev->rx_q);
 564         rsi_init_event(&dev->rx_thread.event);
 565         if (rsi_create_kthread(adapter->priv, &dev->rx_thread,
 566                                rsi_usb_rx_thread, "RX-Thread")) {
 567                 rsi_dbg(ERR_ZONE, "%s: Unable to init rx thrd\n", __func__);
 568                 goto err;
 569         }
 570
 571         return 0;
 572
 573 err:
 574         usb_free_urb(dev->rx_cb[0].rx_urb);
 575         if (adapter->priv->coex_mode > 1)
 576                 usb_free_urb(dev->rx_cb[1].rx_urb);
 577
 578         return -1;
 579 }
 580
 581 /**
 582  * rsi_init_usb_interface() - This function initializes the usb interface.
 583  * @adapter: Pointer to the adapter structure.
 584  * @pfunction: Pointer to USB interface structure.
 585  *
 586  * Return: 0 on success, a negative error code on failure.
 587  */
 588 static int rsi_init_usb_interface(struct rsi_hw *adapter,
 589                                   struct usb_interface *pfunction)
 590 {
 591         struct rsi_91x_usbdev *rsi_dev;
 592         int status;
 593
 594         rsi_dev = kzalloc(sizeof(*rsi_dev), GFP_KERNEL);
 595         if (!rsi_dev)
 596                 return -ENOMEM;
 597
 598         adapter->rsi_dev = rsi_dev;
 599         rsi_dev->usbdev = interface_to_usbdev(pfunction);
 600         rsi_dev->priv = (void *)adapter;
 601
 602         if (rsi_find_bulk_in_and_out_endpoints(pfunction, adapter)) {
 603                 status = -EINVAL;
 604                 goto fail_eps;
 605         }
 606
 607         adapter->device = &pfunction->dev;
 608         usb_set_intfdata(pfunction, adapter);
 609
 610         rsi_dev->tx_buffer = kmalloc(2048, GFP_KERNEL);
 611         if (!rsi_dev->tx_buffer) {
 612                 status = -ENOMEM;
 613                 goto fail_eps;
 614         }
 615
 616         if (rsi_usb_init_rx(adapter)) {
 617                 rsi_dbg(ERR_ZONE, "Failed to init RX handle\n");
 618                 status = -ENOMEM;
 619                 goto fail_rx;
 620         }
 621
 622         rsi_dev->tx_blk_size = 252;
 623         adapter->block_size = rsi_dev->tx_blk_size;
 624
 625         /* Initializing function callbacks */
 626         adapter->check_hw_queue_status = rsi_usb_check_queue_status;
 627         adapter->determine_event_timeout = rsi_usb_event_timeout;
 628         adapter->rsi_host_intf = RSI_HOST_INTF_USB;
 629         adapter->host_intf_ops = &usb_host_intf_ops;
 630
 631 #ifdef CONFIG_RSI_DEBUGFS
 632         /* In USB, one less than the MAX_DEBUGFS_ENTRIES entries is required */
 633         adapter->num_debugfs_entries = (MAX_DEBUGFS_ENTRIES - 1);
 634 #endif
 635
 636         rsi_dbg(INIT_ZONE, "%s: Enabled the interface\n", __func__);
 637         return 0;
 638
 639 fail_rx:
 640         kfree(rsi_dev->tx_buffer);
 641
 642 fail_eps:
 643         kfree(rsi_dev);
 644
 645         return status;
 646 }
 647
 648 static int usb_ulp_read_write(struct rsi_hw *adapter, u16 addr, u32 data,
 649                               u16 len_in_bits)
 650 {
 651         int ret;
 652
 653         ret = rsi_usb_master_reg_write
 654                         (adapter, RSI_GSPI_DATA_REG1,
 655                          ((addr << 6) | ((data >> 16) & 0xffff)), 2);
 656         if (ret < 0)
 657                 return ret;
 658
 659         ret = rsi_usb_master_reg_write(adapter, RSI_GSPI_DATA_REG0,
 660                                        (data & 0xffff), 2);
 661         if (ret < 0)
 662                 return ret;
 663
 664         /* Initializing GSPI for ULP read/writes */
 665         rsi_usb_master_reg_write(adapter, RSI_GSPI_CTRL_REG0,
 666                                  RSI_GSPI_CTRL_REG0_VALUE, 2);
 667
 668         ret = rsi_usb_master_reg_write(adapter, RSI_GSPI_CTRL_REG1,
 669                                        ((len_in_bits - 1) | RSI_GSPI_TRIG), 2);
 670         if (ret < 0)
 671                 return ret;
 672
 673         msleep(20);
 674
 675         return 0;
 676 }
 677
 678 static int rsi_reset_card(struct rsi_hw *adapter)
 679 {
 680         int ret;
 681
 682         rsi_dbg(INFO_ZONE, "Resetting Card...\n");
 683         rsi_usb_master_reg_write(adapter, RSI_TA_HOLD_REG, 0xE, 4);
 684
 685         /* This msleep will ensure Thread-Arch processor to go to hold
 686          * and any pending dma transfers to rf in device to finish.
 687          */
 688         msleep(100);
 689
 690         ret = rsi_usb_master_reg_write(adapter, SWBL_REGOUT,
 691                                        RSI_FW_WDT_DISABLE_REQ,
 692                                        RSI_COMMON_REG_SIZE);
 693         if (ret < 0) {
 694                 rsi_dbg(ERR_ZONE, "Disabling firmware watchdog timer failed\n");
 695                 goto fail;
 696         }
 697
 698         ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_1,
 699                                  RSI_ULP_WRITE_2, 32);
 700         if (ret < 0)
 701                 goto fail;
 702         ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_2,
 703                                  RSI_ULP_WRITE_0, 32);
 704         if (ret < 0)
 705                 goto fail;
 706         ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_DELAY_TIMER_1,
 707                                  RSI_ULP_WRITE_50, 32);
 708         if (ret < 0)
 709                 goto fail;
 710         ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_DELAY_TIMER_2,
 711                                  RSI_ULP_WRITE_0, 32);
 712         if (ret < 0)
 713                 goto fail;
 714         ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_ENABLE,
 715                                  RSI_ULP_TIMER_ENABLE, 32);
 716         if (ret < 0)
 717                 goto fail;
 718
 719         rsi_dbg(INFO_ZONE, "Reset card done\n");
 720         return ret;
 721
 722 fail:
 723         rsi_dbg(ERR_ZONE, "Reset card failed\n");
 724         return ret;
 725 }
 726
 727 /**
 728  * rsi_probe() - This function is called by kernel when the driver provided
 729  *               Vendor and device IDs are matched. All the initialization
 730  *               work is done here.
 731  * @pfunction: Pointer to the USB interface structure.
 732  * @id: Pointer to the usb_device_id structure.
 733  *
 734  * Return: 0 on success, a negative error code on failure.
 735  */
 736 static int rsi_probe(struct usb_interface *pfunction,
 737                      const struct usb_device_id *id)
 738 {
 739         struct rsi_hw *adapter;
 740         struct rsi_91x_usbdev *dev;
 741         u16 fw_status;
 742         int status;
 743
 744         rsi_dbg(INIT_ZONE, "%s: Init function called\n", __func__);
 745
 746         adapter = rsi_91x_init(dev_oper_mode);
 747         if (!adapter) {
 748                 rsi_dbg(ERR_ZONE, "%s: Failed to init os intf ops\n",
 749                         __func__);
 750                 return -ENOMEM;
 751         }
 752         adapter->rsi_host_intf = RSI_HOST_INTF_USB;
 753
 754         status = rsi_init_usb_interface(adapter, pfunction);
 755         if (status) {
 756                 rsi_dbg(ERR_ZONE, "%s: Failed to init usb interface\n",
 757                         __func__);
 758                 goto err;
 759         }
 760
 761         rsi_dbg(ERR_ZONE, "%s: Initialized os intf ops\n", __func__);
 762
 763         dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
 764
 765         status = rsi_usb_reg_read(dev->usbdev, FW_STATUS_REG, &fw_status, 2);
 766         if (status < 0)
 767                 goto err1;
 768         else
 769                 fw_status &= 1;
 770
 771         if (!fw_status) {
 772                 rsi_dbg(INIT_ZONE, "Loading firmware...\n");
 773                 status = rsi_hal_device_init(adapter);
 774                 if (status) {
 775                         rsi_dbg(ERR_ZONE, "%s: Failed in device init\n",
 776                                 __func__);
 777                         goto err1;
 778                 }
 779                 rsi_dbg(INIT_ZONE, "%s: Device Init Done\n", __func__);
 780         }
 781
 782         status = rsi_rx_urb_submit(adapter, WLAN_EP);
 783         if (status)
 784                 goto err1;
 785
 786         if (adapter->priv->coex_mode > 1) {
 787                 status = rsi_rx_urb_submit(adapter, BT_EP);
 788                 if (status)
 789                         goto err1;
 790         }
 791
 792         return 0;
 793 err1:
 794         rsi_deinit_usb_interface(adapter);
 795 err:
 796         rsi_91x_deinit(adapter);
 797         rsi_dbg(ERR_ZONE, "%s: Failed in probe...Exiting\n", __func__);
 798         return status;
 799 }
 800
 801 /**
 802  * rsi_disconnect() - This function performs the reverse of the probe function,
 803  *                    it deinitialize the driver structure.
 804  * @pfunction: Pointer to the USB interface structure.
 805  *
 806  * Return: None.
 807  */
 808 static void rsi_disconnect(struct usb_interface *pfunction)
 809 {
 810         struct rsi_hw *adapter = usb_get_intfdata(pfunction);
 811
 812         if (!adapter)
 813                 return;
 814
 815         rsi_mac80211_detach(adapter);
 816         rsi_reset_card(adapter);
 817         rsi_deinit_usb_interface(adapter);
 818         rsi_91x_deinit(adapter);
 819
 820         rsi_dbg(INFO_ZONE, "%s: Deinitialization completed\n", __func__);
 821 }
 822
 823 #ifdef CONFIG_PM
 824 static int rsi_suspend(struct usb_interface *intf, pm_message_t message)
 825 {
 826         /* Not yet implemented */
 827         return -ENOSYS;
 828 }
 829
 830 static int rsi_resume(struct usb_interface *intf)
 831 {
 832         /* Not yet implemented */
 833         return -ENOSYS;
 834 }
 835 #endif
 836
 837 static const struct usb_device_id rsi_dev_table[] = {
 838         { USB_DEVICE(0x0303, 0x0100) },
 839         { USB_DEVICE(0x041B, 0x0301) },
 840         { USB_DEVICE(0x041B, 0x0201) },
 841         { USB_DEVICE(0x041B, 0x9330) },
 842         { USB_DEVICE(0x1618, 0x9113) },
 843         { /* Blank */},
 844 };
 845
 846 static struct usb_driver rsi_driver = {
 847         .name       = "RSI-USB WLAN",
 848         .probe      = rsi_probe,
 849         .disconnect = rsi_disconnect,
 850         .id_table   = rsi_dev_table,
 851 #ifdef CONFIG_PM
 852         .suspend    = rsi_suspend,
 853         .resume     = rsi_resume,
 854 #endif
 855 };
 856
 857 module_usb_driver(rsi_driver);
 858
 859 MODULE_AUTHOR("Redpine Signals Inc");
 860 MODULE_DESCRIPTION("Common USB layer for RSI drivers");
 861 MODULE_SUPPORTED_DEVICE("RSI-91x");
 862 MODULE_DEVICE_TABLE(usb, rsi_dev_table);
 863 MODULE_FIRMWARE(FIRMWARE_RSI9113);
 864 MODULE_VERSION("0.1");
 865 MODULE_LICENSE("Dual BSD/GPL");