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                              u32 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] = (cpu_to_le32(value) & 0x00ff);
 230         usb_reg_buf[1] = (cpu_to_le32(value) & 0xff00) >> 8;
 231         usb_reg_buf[2] = (cpu_to_le32(value) & 0x00ff0000) >> 16;
 232         usb_reg_buf[3] = (cpu_to_le32(value) & 0xff000000) >> 24;
 233
 234         status = usb_control_msg(usbdev,
 235                                  usb_sndctrlpipe(usbdev, 0),
 236                                  USB_VENDOR_REGISTER_WRITE,
 237                                  RSI_USB_REQ_OUT,
 238                                  ((cpu_to_le32(reg) & 0xffff0000) >> 16),
 239                                  (cpu_to_le32(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 receive 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                 dev_kfree_skb(rx_cb->rx_skb);
 268                 return;
 269         }
 270
 271         if (urb->actual_length <= 0 ||
 272             urb->actual_length > rx_cb->rx_skb->len) {
 273                 rsi_dbg(INFO_ZONE, "%s: Invalid packet length = %d\n",
 274                         __func__, urb->actual_length);
 275                 goto out;
 276         }
 277         if (skb_queue_len(&dev->rx_q) >= RSI_MAX_RX_PKTS) {
 278                 rsi_dbg(INFO_ZONE, "Max RX packets reached\n");
 279                 goto out;
 280         }
 281         skb_trim(rx_cb->rx_skb, urb->actual_length);
 282         skb_queue_tail(&dev->rx_q, rx_cb->rx_skb);
 283
 284         rsi_set_event(&dev->rx_thread.event);
 285         status = 0;
 286
 287 out:
 288         if (rsi_rx_urb_submit(dev->priv, rx_cb->ep_num))
 289                 rsi_dbg(ERR_ZONE, "%s: Failed in urb submission", __func__);
 290
 291         if (status)
 292                 dev_kfree_skb(rx_cb->rx_skb);
 293 }
 294
 295 /**
 296  * rsi_rx_urb_submit() - This function submits the given URB to the USB stack.
 297  * @adapter: Pointer to the adapter structure.
 298  *
 299  * Return: 0 on success, a negative error code on failure.
 300  */
 301 static int rsi_rx_urb_submit(struct rsi_hw *adapter, u8 ep_num)
 302 {
 303         struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
 304         struct rx_usb_ctrl_block *rx_cb = &dev->rx_cb[ep_num - 1];
 305         struct urb *urb = rx_cb->rx_urb;
 306         int status;
 307         struct sk_buff *skb;
 308         u8 dword_align_bytes = 0;
 309
 310 #define RSI_MAX_RX_USB_PKT_SIZE 3000
 311         skb = dev_alloc_skb(RSI_MAX_RX_USB_PKT_SIZE);
 312         if (!skb)
 313                 return -ENOMEM;
 314         skb_reserve(skb, MAX_DWORD_ALIGN_BYTES);
 315         skb_put(skb, RSI_MAX_RX_USB_PKT_SIZE - MAX_DWORD_ALIGN_BYTES);
 316         dword_align_bytes = (unsigned long)skb->data & 0x3f;
 317         if (dword_align_bytes > 0)
 318                 skb_push(skb, dword_align_bytes);
 319         urb->transfer_buffer = skb->data;
 320         rx_cb->rx_skb = skb;
 321
 322         usb_fill_bulk_urb(urb,
 323                           dev->usbdev,
 324                           usb_rcvbulkpipe(dev->usbdev,
 325                           dev->bulkin_endpoint_addr[ep_num - 1]),
 326                           urb->transfer_buffer,
 327                           skb->len,
 328                           rsi_rx_done_handler,
 329                           rx_cb);
 330
 331         status = usb_submit_urb(urb, GFP_KERNEL);
 332         if (status)
 333                 rsi_dbg(ERR_ZONE, "%s: Failed in urb submission\n", __func__);
 334
 335         return status;
 336 }
 337
 338 static int rsi_usb_read_register_multiple(struct rsi_hw *adapter, u32 addr,
 339                                           u8 *data, u16 count)
 340 {
 341         struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
 342         u8 *buf;
 343         u16 transfer;
 344         int status;
 345
 346         if (!addr)
 347                 return -EINVAL;
 348
 349         buf = kzalloc(RSI_USB_BUF_SIZE, GFP_KERNEL);
 350         if (!buf)
 351                 return -ENOMEM;
 352
 353         while (count) {
 354                 transfer = min_t(u16, count, RSI_USB_BUF_SIZE);
 355                 status = usb_control_msg(dev->usbdev,
 356                                          usb_rcvctrlpipe(dev->usbdev, 0),
 357                                          USB_VENDOR_REGISTER_READ,
 358                                          RSI_USB_REQ_IN,
 359                                          ((addr & 0xffff0000) >> 16),
 360                                          (addr & 0xffff), (void *)buf,
 361                                          transfer, USB_CTRL_GET_TIMEOUT);
 362                 if (status < 0) {
 363                         rsi_dbg(ERR_ZONE,
 364                                 "Reg read failed with error code :%d\n",
 365                                  status);
 366                         kfree(buf);
 367                         return status;
 368                 }
 369                 memcpy(data, buf, transfer);
 370                 count -= transfer;
 371                 data += transfer;
 372                 addr += transfer;
 373         }
 374         kfree(buf);
 375         return 0;
 376 }
 377
 378 /**
 379  * rsi_usb_write_register_multiple() - This function writes multiple bytes of
 380  *                                     information to multiple registers.
 381  * @adapter: Pointer to the adapter structure.
 382  * @addr: Address of the register.
 383  * @data: Pointer to the data that has to be written.
 384  * @count: Number of multiple bytes to be written on to the registers.
 385  *
 386  * Return: status: 0 on success, a negative error code on failure.
 387  */
 388 static int rsi_usb_write_register_multiple(struct rsi_hw *adapter, u32 addr,
 389                                            u8 *data, u16 count)
 390 {
 391         struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
 392         u8 *buf;
 393         u16 transfer;
 394         int status = 0;
 395
 396         buf = kzalloc(RSI_USB_BUF_SIZE, GFP_KERNEL);
 397         if (!buf)
 398                 return -ENOMEM;
 399
 400         while (count) {
 401                 transfer = min_t(u16, count, RSI_USB_BUF_SIZE);
 402                 memcpy(buf, data, transfer);
 403                 status = usb_control_msg(dev->usbdev,
 404                                          usb_sndctrlpipe(dev->usbdev, 0),
 405                                          USB_VENDOR_REGISTER_WRITE,
 406                                          RSI_USB_REQ_OUT,
 407                                          ((addr & 0xffff0000) >> 16),
 408                                          (addr & 0xffff),
 409                                          (void *)buf,
 410                                          transfer,
 411                                          USB_CTRL_SET_TIMEOUT);
 412                 if (status < 0) {
 413                         rsi_dbg(ERR_ZONE,
 414                                 "Reg write failed with error code :%d\n",
 415                                 status);
 416                         kfree(buf);
 417                         return status;
 418                 }
 419                 count -= transfer;
 420                 data += transfer;
 421                 addr += transfer;
 422         }
 423
 424         kfree(buf);
 425         return 0;
 426 }
 427
 428 /**
 429  *rsi_usb_host_intf_write_pkt() - This function writes the packet to the
 430  *                                 USB card.
 431  * @adapter: Pointer to the adapter structure.
 432  * @pkt: Pointer to the data to be written on to the card.
 433  * @len: Length of the data to be written on to the card.
 434  *
 435  * Return: 0 on success, a negative error code on failure.
 436  */
 437 static int rsi_usb_host_intf_write_pkt(struct rsi_hw *adapter,
 438                                        u8 *pkt,
 439                                        u32 len)
 440 {
 441         u32 queueno = ((pkt[1] >> 4) & 0x7);
 442         u8 endpoint;
 443
 444         endpoint = ((queueno == RSI_WIFI_MGMT_Q || queueno == RSI_WIFI_DATA_Q ||
 445                      queueno == RSI_COEX_Q) ? WLAN_EP : BT_EP);
 446
 447         return rsi_write_multiple(adapter,
 448                                   endpoint,
 449                                   (u8 *)pkt,
 450                                   len);
 451 }
 452
 453 static int rsi_usb_master_reg_read(struct rsi_hw *adapter, u32 reg,
 454                                    u32 *value, u16 len)
 455 {
 456         struct usb_device *usbdev =
 457                 ((struct rsi_91x_usbdev *)adapter->rsi_dev)->usbdev;
 458         u16 temp;
 459         int ret;
 460
 461         ret = rsi_usb_reg_read(usbdev, reg, &temp, len);
 462         if (ret < 0)
 463                 return ret;
 464         *value = temp;
 465
 466         return 0;
 467 }
 468
 469 static int rsi_usb_master_reg_write(struct rsi_hw *adapter,
 470                                     unsigned long reg,
 471                                     unsigned long value, u16 len)
 472 {
 473         struct usb_device *usbdev =
 474                 ((struct rsi_91x_usbdev *)adapter->rsi_dev)->usbdev;
 475
 476         return rsi_usb_reg_write(usbdev, reg, value, len);
 477 }
 478
 479 static int rsi_usb_load_data_master_write(struct rsi_hw *adapter,
 480                                           u32 base_address,
 481                                           u32 instructions_sz, u16 block_size,
 482                                           u8 *ta_firmware)
 483 {
 484         u16 num_blocks;
 485         u32 cur_indx, i;
 486         u8 temp_buf[256];
 487         int status;
 488
 489         num_blocks = instructions_sz / block_size;
 490         rsi_dbg(INFO_ZONE, "num_blocks: %d\n", num_blocks);
 491
 492         for (cur_indx = 0, i = 0; i < num_blocks; i++, cur_indx += block_size) {
 493                 memcpy(temp_buf, ta_firmware + cur_indx, block_size);
 494                 status = rsi_usb_write_register_multiple(adapter, base_address,
 495                                                          (u8 *)(temp_buf),
 496                                                          block_size);
 497                 if (status < 0)
 498                         return status;
 499
 500                 rsi_dbg(INFO_ZONE, "%s: loading block: %d\n", __func__, i);
 501                 base_address += block_size;
 502         }
 503
 504         if (instructions_sz % block_size) {
 505                 memset(temp_buf, 0, block_size);
 506                 memcpy(temp_buf, ta_firmware + cur_indx,
 507                        instructions_sz % block_size);
 508                 status = rsi_usb_write_register_multiple
 509                                                 (adapter, base_address,
 510                                                  (u8 *)temp_buf,
 511                                                  instructions_sz % block_size);
 512                 if (status < 0)
 513                         return status;
 514                 rsi_dbg(INFO_ZONE,
 515                         "Written Last Block in Address 0x%x Successfully\n",
 516                         cur_indx);
 517         }
 518         return 0;
 519 }
 520
 521 static struct rsi_host_intf_ops usb_host_intf_ops = {
 522         .write_pkt              = rsi_usb_host_intf_write_pkt,
 523         .read_reg_multiple      = rsi_usb_read_register_multiple,
 524         .write_reg_multiple     = rsi_usb_write_register_multiple,
 525         .master_reg_read        = rsi_usb_master_reg_read,
 526         .master_reg_write       = rsi_usb_master_reg_write,
 527         .load_data_master_write = rsi_usb_load_data_master_write,
 528 };
 529
 530 /**
 531  * rsi_deinit_usb_interface() - This function deinitializes the usb interface.
 532  * @adapter: Pointer to the adapter structure.
 533  *
 534  * Return: None.
 535  */
 536 static void rsi_deinit_usb_interface(struct rsi_hw *adapter)
 537 {
 538         struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
 539
 540         rsi_kill_thread(&dev->rx_thread);
 541
 542         usb_free_urb(dev->rx_cb[0].rx_urb);
 543         if (adapter->priv->coex_mode > 1)
 544                 usb_free_urb(dev->rx_cb[1].rx_urb);
 545
 546         kfree(dev->tx_buffer);
 547 }
 548
 549 static int rsi_usb_init_rx(struct rsi_hw *adapter)
 550 {
 551         struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
 552         struct rx_usb_ctrl_block *rx_cb;
 553         u8 idx, num_rx_cb;
 554
 555         num_rx_cb = (adapter->priv->coex_mode > 1 ? 2 : 1);
 556
 557         for (idx = 0; idx < num_rx_cb; idx++) {
 558                 rx_cb = &dev->rx_cb[idx];
 559
 560                 rx_cb->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
 561                 if (!rx_cb->rx_urb) {
 562                         rsi_dbg(ERR_ZONE, "Failed alloc rx urb[%d]\n", idx);
 563                         goto err;
 564                 }
 565                 rx_cb->ep_num = idx + 1;
 566                 rx_cb->data = (void *)dev;
 567         }
 568         skb_queue_head_init(&dev->rx_q);
 569         rsi_init_event(&dev->rx_thread.event);
 570         if (rsi_create_kthread(adapter->priv, &dev->rx_thread,
 571                                rsi_usb_rx_thread, "RX-Thread")) {
 572                 rsi_dbg(ERR_ZONE, "%s: Unable to init rx thrd\n", __func__);
 573                 goto err;
 574         }
 575
 576         return 0;
 577
 578 err:
 579         usb_free_urb(dev->rx_cb[0].rx_urb);
 580         if (adapter->priv->coex_mode > 1)
 581                 usb_free_urb(dev->rx_cb[1].rx_urb);
 582
 583         return -1;
 584 }
 585
 586 /**
 587  * rsi_init_usb_interface() - This function initializes the usb interface.
 588  * @adapter: Pointer to the adapter structure.
 589  * @pfunction: Pointer to USB interface structure.
 590  *
 591  * Return: 0 on success, a negative error code on failure.
 592  */
 593 static int rsi_init_usb_interface(struct rsi_hw *adapter,
 594                                   struct usb_interface *pfunction)
 595 {
 596         struct rsi_91x_usbdev *rsi_dev;
 597         int status;
 598
 599         rsi_dev = kzalloc(sizeof(*rsi_dev), GFP_KERNEL);
 600         if (!rsi_dev)
 601                 return -ENOMEM;
 602
 603         adapter->rsi_dev = rsi_dev;
 604         rsi_dev->usbdev = interface_to_usbdev(pfunction);
 605         rsi_dev->priv = (void *)adapter;
 606
 607         if (rsi_find_bulk_in_and_out_endpoints(pfunction, adapter)) {
 608                 status = -EINVAL;
 609                 goto fail_eps;
 610         }
 611
 612         adapter->device = &pfunction->dev;
 613         usb_set_intfdata(pfunction, adapter);
 614
 615         rsi_dev->tx_buffer = kmalloc(2048, GFP_KERNEL);
 616         if (!rsi_dev->tx_buffer) {
 617                 status = -ENOMEM;
 618                 goto fail_eps;
 619         }
 620
 621         if (rsi_usb_init_rx(adapter)) {
 622                 rsi_dbg(ERR_ZONE, "Failed to init RX handle\n");
 623                 status = -ENOMEM;
 624                 goto fail_rx;
 625         }
 626
 627         rsi_dev->tx_blk_size = 252;
 628         adapter->block_size = rsi_dev->tx_blk_size;
 629
 630         /* Initializing function callbacks */
 631         adapter->check_hw_queue_status = rsi_usb_check_queue_status;
 632         adapter->determine_event_timeout = rsi_usb_event_timeout;
 633         adapter->rsi_host_intf = RSI_HOST_INTF_USB;
 634         adapter->host_intf_ops = &usb_host_intf_ops;
 635
 636 #ifdef CONFIG_RSI_DEBUGFS
 637         /* In USB, one less than the MAX_DEBUGFS_ENTRIES entries is required */
 638         adapter->num_debugfs_entries = (MAX_DEBUGFS_ENTRIES - 1);
 639 #endif
 640
 641         rsi_dbg(INIT_ZONE, "%s: Enabled the interface\n", __func__);
 642         return 0;
 643
 644 fail_rx:
 645         kfree(rsi_dev->tx_buffer);
 646
 647 fail_eps:
 648
 649         return status;
 650 }
 651
 652 static int usb_ulp_read_write(struct rsi_hw *adapter, u16 addr, u32 data,
 653                               u16 len_in_bits)
 654 {
 655         int ret;
 656
 657         ret = rsi_usb_master_reg_write
 658                         (adapter, RSI_GSPI_DATA_REG1,
 659                          ((addr << 6) | ((data >> 16) & 0xffff)), 2);
 660         if (ret < 0)
 661                 return ret;
 662
 663         ret = rsi_usb_master_reg_write(adapter, RSI_GSPI_DATA_REG0,
 664                                        (data & 0xffff), 2);
 665         if (ret < 0)
 666                 return ret;
 667
 668         /* Initializing GSPI for ULP read/writes */
 669         rsi_usb_master_reg_write(adapter, RSI_GSPI_CTRL_REG0,
 670                                  RSI_GSPI_CTRL_REG0_VALUE, 2);
 671
 672         ret = rsi_usb_master_reg_write(adapter, RSI_GSPI_CTRL_REG1,
 673                                        ((len_in_bits - 1) | RSI_GSPI_TRIG), 2);
 674         if (ret < 0)
 675                 return ret;
 676
 677         msleep(20);
 678
 679         return 0;
 680 }
 681
 682 static int rsi_reset_card(struct rsi_hw *adapter)
 683 {
 684         int ret;
 685
 686         rsi_dbg(INFO_ZONE, "Resetting Card...\n");
 687         rsi_usb_master_reg_write(adapter, RSI_TA_HOLD_REG, 0xE, 4);
 688
 689         /* This msleep will ensure Thread-Arch processor to go to hold
 690          * and any pending dma transfers to rf in device to finish.
 691          */
 692         msleep(100);
 693
 694         ret = rsi_usb_master_reg_write(adapter, SWBL_REGOUT,
 695                                        RSI_FW_WDT_DISABLE_REQ,
 696                                        RSI_COMMON_REG_SIZE);
 697         if (ret < 0) {
 698                 rsi_dbg(ERR_ZONE, "Disabling firmware watchdog timer failed\n");
 699                 goto fail;
 700         }
 701
 702         if (adapter->device_model != RSI_DEV_9116) {
 703                 ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_1,
 704                                          RSI_ULP_WRITE_2, 32);
 705                 if (ret < 0)
 706                         goto fail;
 707                 ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_2,
 708                                          RSI_ULP_WRITE_0, 32);
 709                 if (ret < 0)
 710                         goto fail;
 711                 ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_DELAY_TIMER_1,
 712                                          RSI_ULP_WRITE_50, 32);
 713                 if (ret < 0)
 714                         goto fail;
 715                 ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_DELAY_TIMER_2,
 716                                          RSI_ULP_WRITE_0, 32);
 717                 if (ret < 0)
 718                         goto fail;
 719                 ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_ENABLE,
 720                                          RSI_ULP_TIMER_ENABLE, 32);
 721                 if (ret < 0)
 722                         goto fail;
 723         } else {
 724                 if ((rsi_usb_master_reg_write(adapter,
 725                                               NWP_WWD_INTERRUPT_TIMER,
 726                                               NWP_WWD_INT_TIMER_CLKS,
 727                                               RSI_9116_REG_SIZE)) < 0) {
 728                         goto fail;
 729                 }
 730                 if ((rsi_usb_master_reg_write(adapter,
 731                                               NWP_WWD_SYSTEM_RESET_TIMER,
 732                                               NWP_WWD_SYS_RESET_TIMER_CLKS,
 733                                               RSI_9116_REG_SIZE)) < 0) {
 734                         goto fail;
 735                 }
 736                 if ((rsi_usb_master_reg_write(adapter,
 737                                               NWP_WWD_MODE_AND_RSTART,
 738                                               NWP_WWD_TIMER_DISABLE,
 739                                               RSI_9116_REG_SIZE)) < 0) {
 740                         goto fail;
 741                 }
 742         }
 743
 744         rsi_dbg(INFO_ZONE, "Reset card done\n");
 745         return ret;
 746
 747 fail:
 748         rsi_dbg(ERR_ZONE, "Reset card failed\n");
 749         return ret;
 750 }
 751
 752 /**
 753  * rsi_probe() - This function is called by kernel when the driver provided
 754  *               Vendor and device IDs are matched. All the initialization
 755  *               work is done here.
 756  * @pfunction: Pointer to the USB interface structure.
 757  * @id: Pointer to the usb_device_id structure.
 758  *
 759  * Return: 0 on success, a negative error code on failure.
 760  */
 761 static int rsi_probe(struct usb_interface *pfunction,
 762                      const struct usb_device_id *id)
 763 {
 764         struct rsi_hw *adapter;
 765         struct rsi_91x_usbdev *dev;
 766         u16 fw_status;
 767         int status;
 768
 769         rsi_dbg(INIT_ZONE, "%s: Init function called\n", __func__);
 770
 771         adapter = rsi_91x_init(dev_oper_mode);
 772         if (!adapter) {
 773                 rsi_dbg(ERR_ZONE, "%s: Failed to init os intf ops\n",
 774                         __func__);
 775                 return -ENOMEM;
 776         }
 777         adapter->rsi_host_intf = RSI_HOST_INTF_USB;
 778
 779         status = rsi_init_usb_interface(adapter, pfunction);
 780         if (status) {
 781                 rsi_dbg(ERR_ZONE, "%s: Failed to init usb interface\n",
 782                         __func__);
 783                 goto err;
 784         }
 785
 786         rsi_dbg(ERR_ZONE, "%s: Initialized os intf ops\n", __func__);
 787
 788         if (id && id->idProduct == RSI_USB_PID_9113) {
 789                 rsi_dbg(INIT_ZONE, "%s: 9113 module detected\n", __func__);
 790                 adapter->device_model = RSI_DEV_9113;
 791         } else if (id && id->idProduct == RSI_USB_PID_9116) {
 792                 rsi_dbg(INIT_ZONE, "%s: 9116 module detected\n", __func__);
 793                 adapter->device_model = RSI_DEV_9116;
 794         } else {
 795                 rsi_dbg(ERR_ZONE, "%s: Unsupported RSI device id 0x%x\n",
 796                         __func__, id ? id->idProduct : 0x0);
 797                 goto err1;
 798         }
 799
 800         dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
 801
 802         status = rsi_usb_reg_read(dev->usbdev, FW_STATUS_REG, &fw_status, 2);
 803         if (status < 0)
 804                 goto err1;
 805         else
 806                 fw_status &= 1;
 807
 808         if (!fw_status) {
 809                 rsi_dbg(INIT_ZONE, "Loading firmware...\n");
 810                 status = rsi_hal_device_init(adapter);
 811                 if (status) {
 812                         rsi_dbg(ERR_ZONE, "%s: Failed in device init\n",
 813                                 __func__);
 814                         goto err1;
 815                 }
 816                 rsi_dbg(INIT_ZONE, "%s: Device Init Done\n", __func__);
 817         }
 818
 819         status = rsi_rx_urb_submit(adapter, WLAN_EP);
 820         if (status)
 821                 goto err1;
 822
 823         if (adapter->priv->coex_mode > 1) {
 824                 status = rsi_rx_urb_submit(adapter, BT_EP);
 825                 if (status)
 826                         goto err1;
 827         }
 828
 829         return 0;
 830 err1:
 831         rsi_deinit_usb_interface(adapter);
 832 err:
 833         rsi_91x_deinit(adapter);
 834         rsi_dbg(ERR_ZONE, "%s: Failed in probe...Exiting\n", __func__);
 835         return status;
 836 }
 837
 838 /**
 839  * rsi_disconnect() - This function performs the reverse of the probe function,
 840  *                    it deinitialize the driver structure.
 841  * @pfunction: Pointer to the USB interface structure.
 842  *
 843  * Return: None.
 844  */
 845 static void rsi_disconnect(struct usb_interface *pfunction)
 846 {
 847         struct rsi_hw *adapter = usb_get_intfdata(pfunction);
 848
 849         if (!adapter)
 850                 return;
 851
 852         rsi_mac80211_detach(adapter);
 853
 854         if (IS_ENABLED(CONFIG_RSI_COEX) && adapter->priv->coex_mode > 1 &&
 855             adapter->priv->bt_adapter) {
 856                 rsi_bt_ops.detach(adapter->priv->bt_adapter);
 857                 adapter->priv->bt_adapter = NULL;
 858         }
 859
 860         rsi_reset_card(adapter);
 861         rsi_deinit_usb_interface(adapter);
 862         rsi_91x_deinit(adapter);
 863
 864         rsi_dbg(INFO_ZONE, "%s: Deinitialization completed\n", __func__);
 865 }
 866
 867 #ifdef CONFIG_PM
 868 static int rsi_suspend(struct usb_interface *intf, pm_message_t message)
 869 {
 870         /* Not yet implemented */
 871         return -ENOSYS;
 872 }
 873
 874 static int rsi_resume(struct usb_interface *intf)
 875 {
 876         /* Not yet implemented */
 877         return -ENOSYS;
 878 }
 879 #endif
 880
 881 static const struct usb_device_id rsi_dev_table[] = {
 882         { USB_DEVICE(RSI_USB_VENDOR_ID, RSI_USB_PID_9113) },
 883         { USB_DEVICE(RSI_USB_VENDOR_ID, RSI_USB_PID_9116) },
 884         { /* Blank */},
 885 };
 886
 887 static struct usb_driver rsi_driver = {
 888         .name       = "RSI-USB WLAN",
 889         .probe      = rsi_probe,
 890         .disconnect = rsi_disconnect,
 891         .id_table   = rsi_dev_table,
 892 #ifdef CONFIG_PM
 893         .suspend    = rsi_suspend,
 894         .resume     = rsi_resume,
 895 #endif
 896 };
 897
 898 module_usb_driver(rsi_driver);
 899
 900 MODULE_AUTHOR("Redpine Signals Inc");
 901 MODULE_DESCRIPTION("Common USB layer for RSI drivers");
 902 MODULE_SUPPORTED_DEVICE("RSI-91x");
 903 MODULE_DEVICE_TABLE(usb, rsi_dev_table);
 904 MODULE_FIRMWARE(FIRMWARE_RSI9113);
 905 MODULE_VERSION("0.1");
 906 MODULE_LICENSE("Dual BSD/GPL");