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,
  29                  "1[Wi-Fi], 4[BT], 8[BT LE], 5[Wi-Fi STA + BT classic]\n"
  30                  "9[Wi-Fi STA + BT LE], 13[Wi-Fi STA + BT classic + BT LE]\n"
  31                  "6[AP + BT classic], 14[AP + BT classic + BT LE]");
  32
  33 static int rsi_rx_urb_submit(struct rsi_hw *adapter, u8 ep_num, gfp_t flags);
  34
  35 /**
  36  * rsi_usb_card_write() - This function writes to the USB Card.
  37  * @adapter: Pointer to the adapter structure.
  38  * @buf: Pointer to the buffer from where the data has to be taken.
  39  * @len: Length to be written.
  40  * @endpoint: Type of endpoint.
  41  *
  42  * Return: status: 0 on success, a negative error code on failure.
  43  */
  44 static int rsi_usb_card_write(struct rsi_hw *adapter,
  45                               u8 *buf,
  46                               u16 len,
  47                               u8 endpoint)
  48 {
  49         struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
  50         int status;
  51         u8 *seg = dev->tx_buffer;
  52         int transfer;
  53         int ep = dev->bulkout_endpoint_addr[endpoint - 1];
  54
  55         memset(seg, 0, len + RSI_USB_TX_HEAD_ROOM);
  56         memcpy(seg + RSI_USB_TX_HEAD_ROOM, buf, len);
  57         len += RSI_USB_TX_HEAD_ROOM;
  58         transfer = len;
  59         status = usb_bulk_msg(dev->usbdev,
  60                               usb_sndbulkpipe(dev->usbdev, ep),
  61                               (void *)seg,
  62                               (int)len,
  63                               &transfer,
  64                               HZ * 5);
  65
  66         if (status < 0) {
  67                 rsi_dbg(ERR_ZONE,
  68                         "Card write failed with error code :%10d\n", status);
  69                 dev->write_fail = 1;
  70         }
  71         return status;
  72 }
  73
  74 /**
  75  * rsi_write_multiple() - This function writes multiple bytes of information
  76  *                        to the USB card.
  77  * @adapter: Pointer to the adapter structure.
  78  * @addr: Address of the register.
  79  * @data: Pointer to the data that has to be written.
  80  * @count: Number of multiple bytes to be written.
  81  *
  82  * Return: 0 on success, a negative error code on failure.
  83  */
  84 static int rsi_write_multiple(struct rsi_hw *adapter,
  85                               u8 endpoint,
  86                               u8 *data,
  87                               u32 count)
  88 {
  89         struct rsi_91x_usbdev *dev;
  90
  91         if (!adapter)
  92                 return -ENODEV;
  93
  94         if (endpoint == 0)
  95                 return -EINVAL;
  96
  97         dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
  98         if (dev->write_fail)
  99                 return -ENETDOWN;
 100
 101         return rsi_usb_card_write(adapter, data, count, endpoint);
 102 }
 103
 104 /**
 105  * rsi_find_bulk_in_and_out_endpoints() - This function initializes the bulk
 106  *                                        endpoints to the device.
 107  * @interface: Pointer to the USB interface structure.
 108  * @adapter: Pointer to the adapter structure.
 109  *
 110  * Return: ret_val: 0 on success, -ENOMEM on failure.
 111  */
 112 static int rsi_find_bulk_in_and_out_endpoints(struct usb_interface *interface,
 113                                               struct rsi_hw *adapter)
 114 {
 115         struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
 116         struct usb_host_interface *iface_desc;
 117         struct usb_endpoint_descriptor *endpoint;
 118         __le16 buffer_size;
 119         int ii, bin_found = 0, bout_found = 0;
 120
 121         iface_desc = interface->cur_altsetting;
 122
 123         for (ii = 0; ii < iface_desc->desc.bNumEndpoints; ++ii) {
 124                 endpoint = &(iface_desc->endpoint[ii].desc);
 125
 126                 if (!dev->bulkin_endpoint_addr[bin_found] &&
 127                     (endpoint->bEndpointAddress & USB_DIR_IN) &&
 128                     ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
 129                     USB_ENDPOINT_XFER_BULK)) {
 130                         buffer_size = endpoint->wMaxPacketSize;
 131                         dev->bulkin_size[bin_found] = buffer_size;
 132                         dev->bulkin_endpoint_addr[bin_found] =
 133                                 endpoint->bEndpointAddress;
 134                         bin_found++;
 135                 }
 136
 137                 if (!dev->bulkout_endpoint_addr[bout_found] &&
 138                     !(endpoint->bEndpointAddress & USB_DIR_IN) &&
 139                     ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
 140                     USB_ENDPOINT_XFER_BULK)) {
 141                         buffer_size = endpoint->wMaxPacketSize;
 142                         dev->bulkout_endpoint_addr[bout_found] =
 143                                 endpoint->bEndpointAddress;
 144                         dev->bulkout_size[bout_found] = buffer_size;
 145                         bout_found++;
 146                 }
 147
 148                 if (bin_found >= MAX_BULK_EP || bout_found >= MAX_BULK_EP)
 149                         break;
 150         }
 151
 152         if (!(dev->bulkin_endpoint_addr[0]) &&
 153             dev->bulkout_endpoint_addr[0])
 154                 return -EINVAL;
 155
 156         return 0;
 157 }
 158
 159 #define RSI_USB_REQ_OUT (USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE)
 160 #define RSI_USB_REQ_IN  (USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE)
 161
 162 /* rsi_usb_reg_read() - This function reads data from given register address.
 163  * @usbdev: Pointer to the usb_device structure.
 164  * @reg: Address of the register to be read.
 165  * @value: Value to be read.
 166  * @len: length of data to be read.
 167  *
 168  * Return: status: 0 on success, a negative error code on failure.
 169  */
 170 static int rsi_usb_reg_read(struct usb_device *usbdev,
 171                             u32 reg,
 172                             u16 *value,
 173                             u16 len)
 174 {
 175         u8 *buf;
 176         int status = -ENOMEM;
 177
 178         if (len > RSI_USB_CTRL_BUF_SIZE)
 179                 return -EINVAL;
 180
 181         buf  = kmalloc(RSI_USB_CTRL_BUF_SIZE, GFP_KERNEL);
 182         if (!buf)
 183                 return status;
 184
 185         status = usb_control_msg(usbdev,
 186                                  usb_rcvctrlpipe(usbdev, 0),
 187                                  USB_VENDOR_REGISTER_READ,
 188                                  RSI_USB_REQ_IN,
 189                                  ((reg & 0xffff0000) >> 16), (reg & 0xffff),
 190                                  (void *)buf,
 191                                  len,
 192                                  USB_CTRL_GET_TIMEOUT);
 193
 194         *value = (buf[0] | (buf[1] << 8));
 195         if (status < 0) {
 196                 rsi_dbg(ERR_ZONE,
 197                         "%s: Reg read failed with error code :%d\n",
 198                         __func__, status);
 199         }
 200         kfree(buf);
 201
 202         return status;
 203 }
 204
 205 /**
 206  * rsi_usb_reg_write() - This function writes the given data into the given
 207  *                       register address.
 208  * @usbdev: Pointer to the usb_device structure.
 209  * @reg: Address of the register.
 210  * @value: Value to write.
 211  * @len: Length of data to be written.
 212  *
 213  * Return: status: 0 on success, a negative error code on failure.
 214  */
 215 static int rsi_usb_reg_write(struct usb_device *usbdev,
 216                              u32 reg,
 217                              u32 value,
 218                              u16 len)
 219 {
 220         u8 *usb_reg_buf;
 221         int status = -ENOMEM;
 222
 223         if (len > RSI_USB_CTRL_BUF_SIZE)
 224                 return -EINVAL;
 225
 226         usb_reg_buf  = kmalloc(RSI_USB_CTRL_BUF_SIZE, GFP_KERNEL);
 227         if (!usb_reg_buf)
 228                 return status;
 229
 230         usb_reg_buf[0] = (cpu_to_le32(value) & 0x00ff);
 231         usb_reg_buf[1] = (cpu_to_le32(value) & 0xff00) >> 8;
 232         usb_reg_buf[2] = (cpu_to_le32(value) & 0x00ff0000) >> 16;
 233         usb_reg_buf[3] = (cpu_to_le32(value) & 0xff000000) >> 24;
 234
 235         status = usb_control_msg(usbdev,
 236                                  usb_sndctrlpipe(usbdev, 0),
 237                                  USB_VENDOR_REGISTER_WRITE,
 238                                  RSI_USB_REQ_OUT,
 239                                  ((cpu_to_le32(reg) & 0xffff0000) >> 16),
 240                                  (cpu_to_le32(reg) & 0xffff),
 241                                  (void *)usb_reg_buf,
 242                                  len,
 243                                  USB_CTRL_SET_TIMEOUT);
 244         if (status < 0) {
 245                 rsi_dbg(ERR_ZONE,
 246                         "%s: Reg write failed with error code :%d\n",
 247                         __func__, status);
 248         }
 249         kfree(usb_reg_buf);
 250
 251         return status;
 252 }
 253
 254 /**
 255  * rsi_rx_done_handler() - This function is called when a packet is received
 256  *                         from USB stack. This is callback to receive done.
 257  * @urb: Received URB.
 258  *
 259  * Return: None.
 260  */
 261 static void rsi_rx_done_handler(struct urb *urb)
 262 {
 263         struct rx_usb_ctrl_block *rx_cb = urb->context;
 264         struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)rx_cb->data;
 265         int status = -EINVAL;
 266
 267         if (urb->status) {
 268                 dev_kfree_skb(rx_cb->rx_skb);
 269                 return;
 270         }
 271
 272         if (urb->actual_length <= 0 ||
 273             urb->actual_length > rx_cb->rx_skb->len) {
 274                 rsi_dbg(INFO_ZONE, "%s: Invalid packet length = %d\n",
 275                         __func__, urb->actual_length);
 276                 goto out;
 277         }
 278         if (skb_queue_len(&dev->rx_q) >= RSI_MAX_RX_PKTS) {
 279                 rsi_dbg(INFO_ZONE, "Max RX packets reached\n");
 280                 goto out;
 281         }
 282         skb_trim(rx_cb->rx_skb, urb->actual_length);
 283         skb_queue_tail(&dev->rx_q, rx_cb->rx_skb);
 284
 285         rsi_set_event(&dev->rx_thread.event);
 286         status = 0;
 287
 288 out:
 289         if (rsi_rx_urb_submit(dev->priv, rx_cb->ep_num, GFP_ATOMIC))
 290                 rsi_dbg(ERR_ZONE, "%s: Failed in urb submission", __func__);
 291
 292         if (status)
 293                 dev_kfree_skb(rx_cb->rx_skb);
 294 }
 295
 296 static void rsi_rx_urb_kill(struct rsi_hw *adapter, u8 ep_num)
 297 {
 298         struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
 299         struct rx_usb_ctrl_block *rx_cb = &dev->rx_cb[ep_num - 1];
 300         struct urb *urb = rx_cb->rx_urb;
 301
 302         usb_kill_urb(urb);
 303 }
 304
 305 /**
 306  * rsi_rx_urb_submit() - This function submits the given URB to the USB stack.
 307  * @adapter: Pointer to the adapter structure.
 308  *
 309  * Return: 0 on success, a negative error code on failure.
 310  */
 311 static int rsi_rx_urb_submit(struct rsi_hw *adapter, u8 ep_num, gfp_t mem_flags)
 312 {
 313         struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
 314         struct rx_usb_ctrl_block *rx_cb = &dev->rx_cb[ep_num - 1];
 315         struct urb *urb = rx_cb->rx_urb;
 316         int status;
 317         struct sk_buff *skb;
 318         u8 dword_align_bytes = 0;
 319
 320 #define RSI_MAX_RX_USB_PKT_SIZE 3000
 321         skb = dev_alloc_skb(RSI_MAX_RX_USB_PKT_SIZE);
 322         if (!skb)
 323                 return -ENOMEM;
 324         skb_reserve(skb, MAX_DWORD_ALIGN_BYTES);
 325         skb_put(skb, RSI_MAX_RX_USB_PKT_SIZE - MAX_DWORD_ALIGN_BYTES);
 326         dword_align_bytes = (unsigned long)skb->data & 0x3f;
 327         if (dword_align_bytes > 0)
 328                 skb_push(skb, dword_align_bytes);
 329         urb->transfer_buffer = skb->data;
 330         rx_cb->rx_skb = skb;
 331
 332         usb_fill_bulk_urb(urb,
 333                           dev->usbdev,
 334                           usb_rcvbulkpipe(dev->usbdev,
 335                           dev->bulkin_endpoint_addr[ep_num - 1]),
 336                           urb->transfer_buffer,
 337                           skb->len,
 338                           rsi_rx_done_handler,
 339                           rx_cb);
 340
 341         status = usb_submit_urb(urb, mem_flags);
 342         if (status) {
 343                 rsi_dbg(ERR_ZONE, "%s: Failed in urb submission\n", __func__);
 344                 dev_kfree_skb(skb);
 345         }
 346
 347         return status;
 348 }
 349
 350 static int rsi_usb_read_register_multiple(struct rsi_hw *adapter, u32 addr,
 351                                           u8 *data, u16 count)
 352 {
 353         struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
 354         u8 *buf;
 355         u16 transfer;
 356         int status;
 357
 358         if (!addr)
 359                 return -EINVAL;
 360
 361         buf = kzalloc(RSI_USB_BUF_SIZE, GFP_KERNEL);
 362         if (!buf)
 363                 return -ENOMEM;
 364
 365         while (count) {
 366                 transfer = min_t(u16, count, RSI_USB_BUF_SIZE);
 367                 status = usb_control_msg(dev->usbdev,
 368                                          usb_rcvctrlpipe(dev->usbdev, 0),
 369                                          USB_VENDOR_REGISTER_READ,
 370                                          RSI_USB_REQ_IN,
 371                                          ((addr & 0xffff0000) >> 16),
 372                                          (addr & 0xffff), (void *)buf,
 373                                          transfer, USB_CTRL_GET_TIMEOUT);
 374                 if (status < 0) {
 375                         rsi_dbg(ERR_ZONE,
 376                                 "Reg read failed with error code :%d\n",
 377                                  status);
 378                         kfree(buf);
 379                         return status;
 380                 }
 381                 memcpy(data, buf, transfer);
 382                 count -= transfer;
 383                 data += transfer;
 384                 addr += transfer;
 385         }
 386         kfree(buf);
 387         return 0;
 388 }
 389
 390 /**
 391  * rsi_usb_write_register_multiple() - This function writes multiple bytes of
 392  *                                     information to multiple registers.
 393  * @adapter: Pointer to the adapter structure.
 394  * @addr: Address of the register.
 395  * @data: Pointer to the data that has to be written.
 396  * @count: Number of multiple bytes to be written on to the registers.
 397  *
 398  * Return: status: 0 on success, a negative error code on failure.
 399  */
 400 static int rsi_usb_write_register_multiple(struct rsi_hw *adapter, u32 addr,
 401                                            u8 *data, u16 count)
 402 {
 403         struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
 404         u8 *buf;
 405         u16 transfer;
 406         int status = 0;
 407
 408         buf = kzalloc(RSI_USB_BUF_SIZE, GFP_KERNEL);
 409         if (!buf)
 410                 return -ENOMEM;
 411
 412         while (count) {
 413                 transfer = min_t(u16, count, RSI_USB_BUF_SIZE);
 414                 memcpy(buf, data, transfer);
 415                 status = usb_control_msg(dev->usbdev,
 416                                          usb_sndctrlpipe(dev->usbdev, 0),
 417                                          USB_VENDOR_REGISTER_WRITE,
 418                                          RSI_USB_REQ_OUT,
 419                                          ((addr & 0xffff0000) >> 16),
 420                                          (addr & 0xffff),
 421                                          (void *)buf,
 422                                          transfer,
 423                                          USB_CTRL_SET_TIMEOUT);
 424                 if (status < 0) {
 425                         rsi_dbg(ERR_ZONE,
 426                                 "Reg write failed with error code :%d\n",
 427                                 status);
 428                         kfree(buf);
 429                         return status;
 430                 }
 431                 count -= transfer;
 432                 data += transfer;
 433                 addr += transfer;
 434         }
 435
 436         kfree(buf);
 437         return 0;
 438 }
 439
 440 /**
 441  *rsi_usb_host_intf_write_pkt() - This function writes the packet to the
 442  *                                 USB card.
 443  * @adapter: Pointer to the adapter structure.
 444  * @pkt: Pointer to the data to be written on to the card.
 445  * @len: Length of the data to be written on to the card.
 446  *
 447  * Return: 0 on success, a negative error code on failure.
 448  */
 449 static int rsi_usb_host_intf_write_pkt(struct rsi_hw *adapter,
 450                                        u8 *pkt,
 451                                        u32 len)
 452 {
 453         u32 queueno = ((pkt[1] >> 4) & 0x7);
 454         u8 endpoint;
 455
 456         endpoint = ((queueno == RSI_WIFI_MGMT_Q || queueno == RSI_WIFI_DATA_Q ||
 457                      queueno == RSI_COEX_Q) ? WLAN_EP : BT_EP);
 458
 459         return rsi_write_multiple(adapter,
 460                                   endpoint,
 461                                   (u8 *)pkt,
 462                                   len);
 463 }
 464
 465 static int rsi_usb_master_reg_read(struct rsi_hw *adapter, u32 reg,
 466                                    u32 *value, u16 len)
 467 {
 468         struct usb_device *usbdev =
 469                 ((struct rsi_91x_usbdev *)adapter->rsi_dev)->usbdev;
 470         u16 temp;
 471         int ret;
 472
 473         ret = rsi_usb_reg_read(usbdev, reg, &temp, len);
 474         if (ret < 0)
 475                 return ret;
 476         *value = temp;
 477
 478         return 0;
 479 }
 480
 481 static int rsi_usb_master_reg_write(struct rsi_hw *adapter,
 482                                     unsigned long reg,
 483                                     unsigned long value, u16 len)
 484 {
 485         struct usb_device *usbdev =
 486                 ((struct rsi_91x_usbdev *)adapter->rsi_dev)->usbdev;
 487
 488         return rsi_usb_reg_write(usbdev, reg, value, len);
 489 }
 490
 491 static int rsi_usb_load_data_master_write(struct rsi_hw *adapter,
 492                                           u32 base_address,
 493                                           u32 instructions_sz, u16 block_size,
 494                                           u8 *ta_firmware)
 495 {
 496         u16 num_blocks;
 497         u32 cur_indx, i;
 498         u8 temp_buf[256];
 499         int status;
 500
 501         num_blocks = instructions_sz / block_size;
 502         rsi_dbg(INFO_ZONE, "num_blocks: %d\n", num_blocks);
 503
 504         for (cur_indx = 0, i = 0; i < num_blocks; i++, cur_indx += block_size) {
 505                 memcpy(temp_buf, ta_firmware + cur_indx, block_size);
 506                 status = rsi_usb_write_register_multiple(adapter, base_address,
 507                                                          (u8 *)(temp_buf),
 508                                                          block_size);
 509                 if (status < 0)
 510                         return status;
 511
 512                 rsi_dbg(INFO_ZONE, "%s: loading block: %d\n", __func__, i);
 513                 base_address += block_size;
 514         }
 515
 516         if (instructions_sz % block_size) {
 517                 memset(temp_buf, 0, block_size);
 518                 memcpy(temp_buf, ta_firmware + cur_indx,
 519                        instructions_sz % block_size);
 520                 status = rsi_usb_write_register_multiple
 521                                                 (adapter, base_address,
 522                                                  (u8 *)temp_buf,
 523                                                  instructions_sz % block_size);
 524                 if (status < 0)
 525                         return status;
 526                 rsi_dbg(INFO_ZONE,
 527                         "Written Last Block in Address 0x%x Successfully\n",
 528                         cur_indx);
 529         }
 530         return 0;
 531 }
 532
 533 static struct rsi_host_intf_ops usb_host_intf_ops = {
 534         .write_pkt              = rsi_usb_host_intf_write_pkt,
 535         .read_reg_multiple      = rsi_usb_read_register_multiple,
 536         .write_reg_multiple     = rsi_usb_write_register_multiple,
 537         .master_reg_read        = rsi_usb_master_reg_read,
 538         .master_reg_write       = rsi_usb_master_reg_write,
 539         .load_data_master_write = rsi_usb_load_data_master_write,
 540 };
 541
 542 /**
 543  * rsi_deinit_usb_interface() - This function deinitializes the usb interface.
 544  * @adapter: Pointer to the adapter structure.
 545  *
 546  * Return: None.
 547  */
 548 static void rsi_deinit_usb_interface(struct rsi_hw *adapter)
 549 {
 550         struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
 551
 552         rsi_kill_thread(&dev->rx_thread);
 553
 554         usb_free_urb(dev->rx_cb[0].rx_urb);
 555         if (adapter->priv->coex_mode > 1)
 556                 usb_free_urb(dev->rx_cb[1].rx_urb);
 557
 558         kfree(dev->tx_buffer);
 559 }
 560
 561 static int rsi_usb_init_rx(struct rsi_hw *adapter)
 562 {
 563         struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
 564         struct rx_usb_ctrl_block *rx_cb;
 565         u8 idx, num_rx_cb;
 566
 567         num_rx_cb = (adapter->priv->coex_mode > 1 ? 2 : 1);
 568
 569         for (idx = 0; idx < num_rx_cb; idx++) {
 570                 rx_cb = &dev->rx_cb[idx];
 571
 572                 rx_cb->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 573                 if (!rx_cb->rx_urb) {
 574                         rsi_dbg(ERR_ZONE, "Failed alloc rx urb[%d]\n", idx);
 575                         goto err;
 576                 }
 577                 rx_cb->ep_num = idx + 1;
 578                 rx_cb->data = (void *)dev;
 579         }
 580         skb_queue_head_init(&dev->rx_q);
 581         rsi_init_event(&dev->rx_thread.event);
 582         if (rsi_create_kthread(adapter->priv, &dev->rx_thread,
 583                                rsi_usb_rx_thread, "RX-Thread")) {
 584                 rsi_dbg(ERR_ZONE, "%s: Unable to init rx thrd\n", __func__);
 585                 goto err;
 586         }
 587
 588         return 0;
 589
 590 err:
 591         usb_free_urb(dev->rx_cb[0].rx_urb);
 592         if (adapter->priv->coex_mode > 1)
 593                 usb_free_urb(dev->rx_cb[1].rx_urb);
 594
 595         return -1;
 596 }
 597
 598 /**
 599  * rsi_init_usb_interface() - This function initializes the usb interface.
 600  * @adapter: Pointer to the adapter structure.
 601  * @pfunction: Pointer to USB interface structure.
 602  *
 603  * Return: 0 on success, a negative error code on failure.
 604  */
 605 static int rsi_init_usb_interface(struct rsi_hw *adapter,
 606                                   struct usb_interface *pfunction)
 607 {
 608         struct rsi_91x_usbdev *rsi_dev;
 609         int status;
 610
 611         rsi_dev = kzalloc(sizeof(*rsi_dev), GFP_KERNEL);
 612         if (!rsi_dev)
 613                 return -ENOMEM;
 614
 615         adapter->rsi_dev = rsi_dev;
 616         rsi_dev->usbdev = interface_to_usbdev(pfunction);
 617         rsi_dev->priv = (void *)adapter;
 618
 619         if (rsi_find_bulk_in_and_out_endpoints(pfunction, adapter)) {
 620                 status = -EINVAL;
 621                 goto fail_eps;
 622         }
 623
 624         adapter->device = &pfunction->dev;
 625         usb_set_intfdata(pfunction, adapter);
 626
 627         rsi_dev->tx_buffer = kmalloc(2048, GFP_KERNEL);
 628         if (!rsi_dev->tx_buffer) {
 629                 status = -ENOMEM;
 630                 goto fail_eps;
 631         }
 632
 633         if (rsi_usb_init_rx(adapter)) {
 634                 rsi_dbg(ERR_ZONE, "Failed to init RX handle\n");
 635                 status = -ENOMEM;
 636                 goto fail_rx;
 637         }
 638
 639         rsi_dev->tx_blk_size = 252;
 640         adapter->block_size = rsi_dev->tx_blk_size;
 641
 642         /* Initializing function callbacks */
 643         adapter->check_hw_queue_status = rsi_usb_check_queue_status;
 644         adapter->determine_event_timeout = rsi_usb_event_timeout;
 645         adapter->rsi_host_intf = RSI_HOST_INTF_USB;
 646         adapter->host_intf_ops = &usb_host_intf_ops;
 647
 648 #ifdef CONFIG_RSI_DEBUGFS
 649         /* In USB, one less than the MAX_DEBUGFS_ENTRIES entries is required */
 650         adapter->num_debugfs_entries = (MAX_DEBUGFS_ENTRIES - 1);
 651 #endif
 652
 653         rsi_dbg(INIT_ZONE, "%s: Enabled the interface\n", __func__);
 654         return 0;
 655
 656 fail_rx:
 657         kfree(rsi_dev->tx_buffer);
 658
 659 fail_eps:
 660
 661         return status;
 662 }
 663
 664 static int usb_ulp_read_write(struct rsi_hw *adapter, u16 addr, u32 data,
 665                               u16 len_in_bits)
 666 {
 667         int ret;
 668
 669         ret = rsi_usb_master_reg_write
 670                         (adapter, RSI_GSPI_DATA_REG1,
 671                          ((addr << 6) | ((data >> 16) & 0xffff)), 2);
 672         if (ret < 0)
 673                 return ret;
 674
 675         ret = rsi_usb_master_reg_write(adapter, RSI_GSPI_DATA_REG0,
 676                                        (data & 0xffff), 2);
 677         if (ret < 0)
 678                 return ret;
 679
 680         /* Initializing GSPI for ULP read/writes */
 681         rsi_usb_master_reg_write(adapter, RSI_GSPI_CTRL_REG0,
 682                                  RSI_GSPI_CTRL_REG0_VALUE, 2);
 683
 684         ret = rsi_usb_master_reg_write(adapter, RSI_GSPI_CTRL_REG1,
 685                                        ((len_in_bits - 1) | RSI_GSPI_TRIG), 2);
 686         if (ret < 0)
 687                 return ret;
 688
 689         msleep(20);
 690
 691         return 0;
 692 }
 693
 694 static int rsi_reset_card(struct rsi_hw *adapter)
 695 {
 696         int ret;
 697
 698         rsi_dbg(INFO_ZONE, "Resetting Card...\n");
 699         rsi_usb_master_reg_write(adapter, RSI_TA_HOLD_REG, 0xE, 4);
 700
 701         /* This msleep will ensure Thread-Arch processor to go to hold
 702          * and any pending dma transfers to rf in device to finish.
 703          */
 704         msleep(100);
 705
 706         ret = rsi_usb_master_reg_write(adapter, SWBL_REGOUT,
 707                                        RSI_FW_WDT_DISABLE_REQ,
 708                                        RSI_COMMON_REG_SIZE);
 709         if (ret < 0) {
 710                 rsi_dbg(ERR_ZONE, "Disabling firmware watchdog timer failed\n");
 711                 goto fail;
 712         }
 713
 714         if (adapter->device_model != RSI_DEV_9116) {
 715                 ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_1,
 716                                          RSI_ULP_WRITE_2, 32);
 717                 if (ret < 0)
 718                         goto fail;
 719                 ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_2,
 720                                          RSI_ULP_WRITE_0, 32);
 721                 if (ret < 0)
 722                         goto fail;
 723                 ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_DELAY_TIMER_1,
 724                                          RSI_ULP_WRITE_50, 32);
 725                 if (ret < 0)
 726                         goto fail;
 727                 ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_DELAY_TIMER_2,
 728                                          RSI_ULP_WRITE_0, 32);
 729                 if (ret < 0)
 730                         goto fail;
 731                 ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_ENABLE,
 732                                          RSI_ULP_TIMER_ENABLE, 32);
 733                 if (ret < 0)
 734                         goto fail;
 735         } else {
 736                 if ((rsi_usb_master_reg_write(adapter,
 737                                               NWP_WWD_INTERRUPT_TIMER,
 738                                               NWP_WWD_INT_TIMER_CLKS,
 739                                               RSI_9116_REG_SIZE)) < 0) {
 740                         goto fail;
 741                 }
 742                 if ((rsi_usb_master_reg_write(adapter,
 743                                               NWP_WWD_SYSTEM_RESET_TIMER,
 744                                               NWP_WWD_SYS_RESET_TIMER_CLKS,
 745                                               RSI_9116_REG_SIZE)) < 0) {
 746                         goto fail;
 747                 }
 748                 if ((rsi_usb_master_reg_write(adapter,
 749                                               NWP_WWD_MODE_AND_RSTART,
 750                                               NWP_WWD_TIMER_DISABLE,
 751                                               RSI_9116_REG_SIZE)) < 0) {
 752                         goto fail;
 753                 }
 754         }
 755
 756         rsi_dbg(INFO_ZONE, "Reset card done\n");
 757         return ret;
 758
 759 fail:
 760         rsi_dbg(ERR_ZONE, "Reset card failed\n");
 761         return ret;
 762 }
 763
 764 /**
 765  * rsi_probe() - This function is called by kernel when the driver provided
 766  *               Vendor and device IDs are matched. All the initialization
 767  *               work is done here.
 768  * @pfunction: Pointer to the USB interface structure.
 769  * @id: Pointer to the usb_device_id structure.
 770  *
 771  * Return: 0 on success, a negative error code on failure.
 772  */
 773 static int rsi_probe(struct usb_interface *pfunction,
 774                      const struct usb_device_id *id)
 775 {
 776         struct rsi_hw *adapter;
 777         struct rsi_91x_usbdev *dev;
 778         u16 fw_status;
 779         int status;
 780
 781         rsi_dbg(INIT_ZONE, "%s: Init function called\n", __func__);
 782
 783         adapter = rsi_91x_init(dev_oper_mode);
 784         if (!adapter) {
 785                 rsi_dbg(ERR_ZONE, "%s: Failed to init os intf ops\n",
 786                         __func__);
 787                 return -ENOMEM;
 788         }
 789         adapter->rsi_host_intf = RSI_HOST_INTF_USB;
 790
 791         status = rsi_init_usb_interface(adapter, pfunction);
 792         if (status) {
 793                 rsi_dbg(ERR_ZONE, "%s: Failed to init usb interface\n",
 794                         __func__);
 795                 goto err;
 796         }
 797
 798         rsi_dbg(ERR_ZONE, "%s: Initialized os intf ops\n", __func__);
 799
 800         if (id && id->idProduct == RSI_USB_PID_9113) {
 801                 rsi_dbg(INIT_ZONE, "%s: 9113 module detected\n", __func__);
 802                 adapter->device_model = RSI_DEV_9113;
 803         } else if (id && id->idProduct == RSI_USB_PID_9116) {
 804                 rsi_dbg(INIT_ZONE, "%s: 9116 module detected\n", __func__);
 805                 adapter->device_model = RSI_DEV_9116;
 806         } else {
 807                 rsi_dbg(ERR_ZONE, "%s: Unsupported RSI device id 0x%x\n",
 808                         __func__, id->idProduct);
 809                 goto err1;
 810         }
 811
 812         dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
 813
 814         status = rsi_usb_reg_read(dev->usbdev, FW_STATUS_REG, &fw_status, 2);
 815         if (status < 0)
 816                 goto err1;
 817         else
 818                 fw_status &= 1;
 819
 820         if (!fw_status) {
 821                 rsi_dbg(INIT_ZONE, "Loading firmware...\n");
 822                 status = rsi_hal_device_init(adapter);
 823                 if (status) {
 824                         rsi_dbg(ERR_ZONE, "%s: Failed in device init\n",
 825                                 __func__);
 826                         goto err1;
 827                 }
 828                 rsi_dbg(INIT_ZONE, "%s: Device Init Done\n", __func__);
 829         }
 830
 831         status = rsi_rx_urb_submit(adapter, WLAN_EP, GFP_KERNEL);
 832         if (status)
 833                 goto err1;
 834
 835         if (adapter->priv->coex_mode > 1) {
 836                 status = rsi_rx_urb_submit(adapter, BT_EP, GFP_KERNEL);
 837                 if (status)
 838                         goto err_kill_wlan_urb;
 839         }
 840
 841         return 0;
 842
 843 err_kill_wlan_urb:
 844         rsi_rx_urb_kill(adapter, WLAN_EP);
 845 err1:
 846         rsi_deinit_usb_interface(adapter);
 847 err:
 848         rsi_91x_deinit(adapter);
 849         rsi_dbg(ERR_ZONE, "%s: Failed in probe...Exiting\n", __func__);
 850         return status;
 851 }
 852
 853 /**
 854  * rsi_disconnect() - This function performs the reverse of the probe function,
 855  *                    it deinitialize the driver structure.
 856  * @pfunction: Pointer to the USB interface structure.
 857  *
 858  * Return: None.
 859  */
 860 static void rsi_disconnect(struct usb_interface *pfunction)
 861 {
 862         struct rsi_hw *adapter = usb_get_intfdata(pfunction);
 863
 864         if (!adapter)
 865                 return;
 866
 867         rsi_mac80211_detach(adapter);
 868
 869         if (IS_ENABLED(CONFIG_RSI_COEX) && adapter->priv->coex_mode > 1 &&
 870             adapter->priv->bt_adapter) {
 871                 rsi_bt_ops.detach(adapter->priv->bt_adapter);
 872                 adapter->priv->bt_adapter = NULL;
 873         }
 874
 875         if (adapter->priv->coex_mode > 1)
 876                 rsi_rx_urb_kill(adapter, BT_EP);
 877         rsi_rx_urb_kill(adapter, WLAN_EP);
 878
 879         rsi_reset_card(adapter);
 880         rsi_deinit_usb_interface(adapter);
 881         rsi_91x_deinit(adapter);
 882
 883         rsi_dbg(INFO_ZONE, "%s: Deinitialization completed\n", __func__);
 884 }
 885
 886 #ifdef CONFIG_PM
 887 static int rsi_suspend(struct usb_interface *intf, pm_message_t message)
 888 {
 889         /* Not yet implemented */
 890         return -ENOSYS;
 891 }
 892
 893 static int rsi_resume(struct usb_interface *intf)
 894 {
 895         /* Not yet implemented */
 896         return -ENOSYS;
 897 }
 898 #endif
 899
 900 static const struct usb_device_id rsi_dev_table[] = {
 901         { USB_DEVICE(RSI_USB_VENDOR_ID, RSI_USB_PID_9113) },
 902         { USB_DEVICE(RSI_USB_VENDOR_ID, RSI_USB_PID_9116) },
 903         { /* Blank */},
 904 };
 905
 906 static struct usb_driver rsi_driver = {
 907         .name       = "RSI-USB WLAN",
 908         .probe      = rsi_probe,
 909         .disconnect = rsi_disconnect,
 910         .id_table   = rsi_dev_table,
 911 #ifdef CONFIG_PM
 912         .suspend    = rsi_suspend,
 913         .resume     = rsi_resume,
 914 #endif
 915 };
 916
 917 module_usb_driver(rsi_driver);
 918
 919 MODULE_AUTHOR("Redpine Signals Inc");
 920 MODULE_DESCRIPTION("Common USB layer for RSI drivers");
 921 MODULE_SUPPORTED_DEVICE("RSI-91x");
 922 MODULE_DEVICE_TABLE(usb, rsi_dev_table);
 923 /*(DEBLOBBED)*/
 924 MODULE_VERSION("0.1");
 925 MODULE_LICENSE("Dual BSD/GPL");