1 /* 2 * Copyright (c) 2014 Redpine Signals Inc. 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 * 16 */ 17 18 #include <linux/module.h> 19 #include <linux/types.h> 20 #include <net/rsi_91x.h> 21 #include "rsi_usb.h" 22 #include "rsi_hal.h" 23 #include "rsi_coex.h" 24 25 /* Default operating mode is wlan STA + BT */ 26 static u16 dev_oper_mode = DEV_OPMODE_STA_BT_DUAL; 27 module_param(dev_oper_mode, ushort, 0444); 28 MODULE_PARM_DESC(dev_oper_mode, DEV_OPMODE_PARAM_DESC); 29 30 static int rsi_rx_urb_submit(struct rsi_hw *adapter, u8 ep_num, gfp_t flags); 31 32 /** 33 * rsi_usb_card_write() - This function writes to the USB Card. 34 * @adapter: Pointer to the adapter structure. 35 * @buf: Pointer to the buffer from where the data has to be taken. 36 * @len: Length to be written. 37 * @endpoint: Type of endpoint. 38 * 39 * Return: status: 0 on success, a negative error code on failure. 40 */ 41 static int rsi_usb_card_write(struct rsi_hw *adapter, 42 u8 *buf, 43 u16 len, 44 u8 endpoint) 45 { 46 struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev; 47 int status; 48 u8 *seg = dev->tx_buffer; 49 int transfer; 50 int ep = dev->bulkout_endpoint_addr[endpoint - 1]; 51 52 memset(seg, 0, len + RSI_USB_TX_HEAD_ROOM); 53 memcpy(seg + RSI_USB_TX_HEAD_ROOM, buf, len); 54 len += RSI_USB_TX_HEAD_ROOM; 55 transfer = len; 56 status = usb_bulk_msg(dev->usbdev, 57 usb_sndbulkpipe(dev->usbdev, ep), 58 (void *)seg, 59 (int)len, 60 &transfer, 61 USB_CTRL_SET_TIMEOUT); 62 63 if (status < 0) { 64 rsi_dbg(ERR_ZONE, 65 "Card write failed with error code :%10d\n", status); 66 dev->write_fail = 1; 67 } 68 return status; 69 } 70 71 /** 72 * rsi_write_multiple() - This function writes multiple bytes of information 73 * to the USB card. 74 * @adapter: Pointer to the adapter structure. 75 * @endpoint: Type of endpoint. 76 * @data: Pointer to the data that has to be written. 77 * @count: Number of multiple bytes to be written. 78 * 79 * Return: 0 on success, a negative error code on failure. 80 */ 81 static int rsi_write_multiple(struct rsi_hw *adapter, 82 u8 endpoint, 83 u8 *data, 84 u32 count) 85 { 86 struct rsi_91x_usbdev *dev; 87 88 if (!adapter) 89 return -ENODEV; 90 91 if (endpoint == 0) 92 return -EINVAL; 93 94 dev = (struct rsi_91x_usbdev *)adapter->rsi_dev; 95 if (dev->write_fail) 96 return -ENETDOWN; 97 98 return rsi_usb_card_write(adapter, data, count, endpoint); 99 } 100 101 /** 102 * rsi_find_bulk_in_and_out_endpoints() - This function initializes the bulk 103 * endpoints to the device. 104 * @interface: Pointer to the USB interface structure. 105 * @adapter: Pointer to the adapter structure. 106 * 107 * Return: ret_val: 0 on success, -ENOMEM on failure. 108 */ 109 static int rsi_find_bulk_in_and_out_endpoints(struct usb_interface *interface, 110 struct rsi_hw *adapter) 111 { 112 struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev; 113 struct usb_host_interface *iface_desc; 114 struct usb_endpoint_descriptor *endpoint; 115 __le16 buffer_size; 116 int ii, bin_found = 0, bout_found = 0; 117 118 iface_desc = interface->cur_altsetting; 119 120 for (ii = 0; ii < iface_desc->desc.bNumEndpoints; ++ii) { 121 endpoint = &(iface_desc->endpoint[ii].desc); 122 123 if (!dev->bulkin_endpoint_addr[bin_found] && 124 (endpoint->bEndpointAddress & USB_DIR_IN) && 125 ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == 126 USB_ENDPOINT_XFER_BULK)) { 127 buffer_size = endpoint->wMaxPacketSize; 128 dev->bulkin_size[bin_found] = buffer_size; 129 dev->bulkin_endpoint_addr[bin_found] = 130 endpoint->bEndpointAddress; 131 bin_found++; 132 } 133 134 if (!dev->bulkout_endpoint_addr[bout_found] && 135 !(endpoint->bEndpointAddress & USB_DIR_IN) && 136 ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == 137 USB_ENDPOINT_XFER_BULK)) { 138 buffer_size = endpoint->wMaxPacketSize; 139 dev->bulkout_endpoint_addr[bout_found] = 140 endpoint->bEndpointAddress; 141 dev->bulkout_size[bout_found] = buffer_size; 142 bout_found++; 143 } 144 145 if (bin_found >= MAX_BULK_EP || bout_found >= MAX_BULK_EP) 146 break; 147 } 148 149 if (!(dev->bulkin_endpoint_addr[0] && dev->bulkout_endpoint_addr[0])) { 150 dev_err(&interface->dev, "missing wlan bulk endpoints\n"); 151 return -EINVAL; 152 } 153 154 if (adapter->priv->coex_mode > 1) { 155 if (!dev->bulkin_endpoint_addr[1]) { 156 dev_err(&interface->dev, "missing bt bulk-in endpoint\n"); 157 return -EINVAL; 158 } 159 } 160 161 return 0; 162 } 163 164 #define RSI_USB_REQ_OUT (USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE) 165 #define RSI_USB_REQ_IN (USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE) 166 167 /* rsi_usb_reg_read() - This function reads data from given register address. 168 * @usbdev: Pointer to the usb_device structure. 169 * @reg: Address of the register to be read. 170 * @value: Value to be read. 171 * @len: length of data to be read. 172 * 173 * Return: status: 0 on success, a negative error code on failure. 174 */ 175 static int rsi_usb_reg_read(struct usb_device *usbdev, 176 u32 reg, 177 u16 *value, 178 u16 len) 179 { 180 u8 *buf; 181 int status = -ENOMEM; 182 183 if (len > RSI_USB_CTRL_BUF_SIZE) 184 return -EINVAL; 185 186 buf = kmalloc(RSI_USB_CTRL_BUF_SIZE, GFP_KERNEL); 187 if (!buf) 188 return status; 189 190 status = usb_control_msg(usbdev, 191 usb_rcvctrlpipe(usbdev, 0), 192 USB_VENDOR_REGISTER_READ, 193 RSI_USB_REQ_IN, 194 ((reg & 0xffff0000) >> 16), (reg & 0xffff), 195 (void *)buf, 196 len, 197 USB_CTRL_GET_TIMEOUT); 198 199 *value = (buf[0] | (buf[1] << 8)); 200 if (status < 0) { 201 rsi_dbg(ERR_ZONE, 202 "%s: Reg read failed with error code :%d\n", 203 __func__, status); 204 } 205 kfree(buf); 206 207 return status; 208 } 209 210 /** 211 * rsi_usb_reg_write() - This function writes the given data into the given 212 * register address. 213 * @usbdev: Pointer to the usb_device structure. 214 * @reg: Address of the register. 215 * @value: Value to write. 216 * @len: Length of data to be written. 217 * 218 * Return: status: 0 on success, a negative error code on failure. 219 */ 220 static int rsi_usb_reg_write(struct usb_device *usbdev, 221 u32 reg, 222 u32 value, 223 u16 len) 224 { 225 u8 *usb_reg_buf; 226 int status = -ENOMEM; 227 228 if (len > RSI_USB_CTRL_BUF_SIZE) 229 return -EINVAL; 230 231 usb_reg_buf = kmalloc(RSI_USB_CTRL_BUF_SIZE, GFP_KERNEL); 232 if (!usb_reg_buf) 233 return status; 234 235 usb_reg_buf[0] = (cpu_to_le32(value) & 0x00ff); 236 usb_reg_buf[1] = (cpu_to_le32(value) & 0xff00) >> 8; 237 usb_reg_buf[2] = (cpu_to_le32(value) & 0x00ff0000) >> 16; 238 usb_reg_buf[3] = (cpu_to_le32(value) & 0xff000000) >> 24; 239 240 status = usb_control_msg(usbdev, 241 usb_sndctrlpipe(usbdev, 0), 242 USB_VENDOR_REGISTER_WRITE, 243 RSI_USB_REQ_OUT, 244 ((cpu_to_le32(reg) & 0xffff0000) >> 16), 245 (cpu_to_le32(reg) & 0xffff), 246 (void *)usb_reg_buf, 247 len, 248 USB_CTRL_SET_TIMEOUT); 249 if (status < 0) { 250 rsi_dbg(ERR_ZONE, 251 "%s: Reg write failed with error code :%d\n", 252 __func__, status); 253 } 254 kfree(usb_reg_buf); 255 256 return status; 257 } 258 259 /** 260 * rsi_rx_done_handler() - This function is called when a packet is received 261 * from USB stack. This is callback to receive done. 262 * @urb: Received URB. 263 * 264 * Return: None. 265 */ 266 static void rsi_rx_done_handler(struct urb *urb) 267 { 268 struct rx_usb_ctrl_block *rx_cb = urb->context; 269 struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)rx_cb->data; 270 int status = -EINVAL; 271 272 if (!rx_cb->rx_skb) 273 return; 274 275 if (urb->status) { 276 dev_kfree_skb(rx_cb->rx_skb); 277 rx_cb->rx_skb = NULL; 278 return; 279 } 280 281 if (urb->actual_length <= 0 || 282 urb->actual_length > rx_cb->rx_skb->len) { 283 rsi_dbg(INFO_ZONE, "%s: Invalid packet length = %d\n", 284 __func__, urb->actual_length); 285 goto out; 286 } 287 if (skb_queue_len(&dev->rx_q) >= RSI_MAX_RX_PKTS) { 288 rsi_dbg(INFO_ZONE, "Max RX packets reached\n"); 289 goto out; 290 } 291 skb_trim(rx_cb->rx_skb, urb->actual_length); 292 skb_queue_tail(&dev->rx_q, rx_cb->rx_skb); 293 294 rsi_set_event(&dev->rx_thread.event); 295 status = 0; 296 297 out: 298 if (rsi_rx_urb_submit(dev->priv, rx_cb->ep_num, GFP_ATOMIC)) 299 rsi_dbg(ERR_ZONE, "%s: Failed in urb submission", __func__); 300 301 if (status) { 302 dev_kfree_skb(rx_cb->rx_skb); 303 rx_cb->rx_skb = NULL; 304 } 305 } 306 307 static void rsi_rx_urb_kill(struct rsi_hw *adapter, u8 ep_num) 308 { 309 struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev; 310 struct rx_usb_ctrl_block *rx_cb = &dev->rx_cb[ep_num - 1]; 311 struct urb *urb = rx_cb->rx_urb; 312 313 usb_kill_urb(urb); 314 } 315 316 /** 317 * rsi_rx_urb_submit() - This function submits the given URB to the USB stack. 318 * @adapter: Pointer to the adapter structure. 319 * @ep_num: Endpoint number. 320 * @mem_flags: The type of memory to allocate. 321 * 322 * Return: 0 on success, a negative error code on failure. 323 */ 324 static int rsi_rx_urb_submit(struct rsi_hw *adapter, u8 ep_num, gfp_t mem_flags) 325 { 326 struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev; 327 struct rx_usb_ctrl_block *rx_cb = &dev->rx_cb[ep_num - 1]; 328 struct urb *urb = rx_cb->rx_urb; 329 int status; 330 struct sk_buff *skb; 331 u8 dword_align_bytes = 0; 332 333 skb = dev_alloc_skb(RSI_MAX_RX_USB_PKT_SIZE); 334 if (!skb) 335 return -ENOMEM; 336 skb_reserve(skb, MAX_DWORD_ALIGN_BYTES); 337 skb_put(skb, RSI_MAX_RX_USB_PKT_SIZE - MAX_DWORD_ALIGN_BYTES); 338 dword_align_bytes = (unsigned long)skb->data & 0x3f; 339 if (dword_align_bytes > 0) 340 skb_push(skb, dword_align_bytes); 341 urb->transfer_buffer = skb->data; 342 rx_cb->rx_skb = skb; 343 344 usb_fill_bulk_urb(urb, 345 dev->usbdev, 346 usb_rcvbulkpipe(dev->usbdev, 347 dev->bulkin_endpoint_addr[ep_num - 1]), 348 urb->transfer_buffer, 349 skb->len, 350 rsi_rx_done_handler, 351 rx_cb); 352 353 status = usb_submit_urb(urb, mem_flags); 354 if (status) { 355 rsi_dbg(ERR_ZONE, "%s: Failed in urb submission\n", __func__); 356 dev_kfree_skb(skb); 357 } 358 359 return status; 360 } 361 362 static int rsi_usb_read_register_multiple(struct rsi_hw *adapter, u32 addr, 363 u8 *data, u16 count) 364 { 365 struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev; 366 u8 *buf; 367 u16 transfer; 368 int status; 369 370 if (!addr) 371 return -EINVAL; 372 373 buf = kzalloc(RSI_USB_BUF_SIZE, GFP_KERNEL); 374 if (!buf) 375 return -ENOMEM; 376 377 while (count) { 378 transfer = min_t(u16, count, RSI_USB_BUF_SIZE); 379 status = usb_control_msg(dev->usbdev, 380 usb_rcvctrlpipe(dev->usbdev, 0), 381 USB_VENDOR_REGISTER_READ, 382 RSI_USB_REQ_IN, 383 ((addr & 0xffff0000) >> 16), 384 (addr & 0xffff), (void *)buf, 385 transfer, USB_CTRL_GET_TIMEOUT); 386 if (status < 0) { 387 rsi_dbg(ERR_ZONE, 388 "Reg read failed with error code :%d\n", 389 status); 390 kfree(buf); 391 return status; 392 } 393 memcpy(data, buf, transfer); 394 count -= transfer; 395 data += transfer; 396 addr += transfer; 397 } 398 kfree(buf); 399 return 0; 400 } 401 402 /** 403 * rsi_usb_write_register_multiple() - This function writes multiple bytes of 404 * information to multiple registers. 405 * @adapter: Pointer to the adapter structure. 406 * @addr: Address of the register. 407 * @data: Pointer to the data that has to be written. 408 * @count: Number of multiple bytes to be written on to the registers. 409 * 410 * Return: status: 0 on success, a negative error code on failure. 411 */ 412 static int rsi_usb_write_register_multiple(struct rsi_hw *adapter, u32 addr, 413 u8 *data, u16 count) 414 { 415 struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev; 416 u8 *buf; 417 u16 transfer; 418 int status = 0; 419 420 buf = kzalloc(RSI_USB_BUF_SIZE, GFP_KERNEL); 421 if (!buf) 422 return -ENOMEM; 423 424 while (count) { 425 transfer = min_t(u16, count, RSI_USB_BUF_SIZE); 426 memcpy(buf, data, transfer); 427 status = usb_control_msg(dev->usbdev, 428 usb_sndctrlpipe(dev->usbdev, 0), 429 USB_VENDOR_REGISTER_WRITE, 430 RSI_USB_REQ_OUT, 431 ((addr & 0xffff0000) >> 16), 432 (addr & 0xffff), 433 (void *)buf, 434 transfer, 435 USB_CTRL_SET_TIMEOUT); 436 if (status < 0) { 437 rsi_dbg(ERR_ZONE, 438 "Reg write failed with error code :%d\n", 439 status); 440 kfree(buf); 441 return status; 442 } 443 count -= transfer; 444 data += transfer; 445 addr += transfer; 446 } 447 448 kfree(buf); 449 return 0; 450 } 451 452 /** 453 *rsi_usb_host_intf_write_pkt() - This function writes the packet to the 454 * USB card. 455 * @adapter: Pointer to the adapter structure. 456 * @pkt: Pointer to the data to be written on to the card. 457 * @len: Length of the data to be written on to the card. 458 * 459 * Return: 0 on success, a negative error code on failure. 460 */ 461 static int rsi_usb_host_intf_write_pkt(struct rsi_hw *adapter, 462 u8 *pkt, 463 u32 len) 464 { 465 u32 queueno = ((pkt[1] >> 4) & 0x7); 466 u8 endpoint; 467 468 endpoint = ((queueno == RSI_WIFI_MGMT_Q || queueno == RSI_WIFI_DATA_Q || 469 queueno == RSI_COEX_Q) ? WLAN_EP : BT_EP); 470 471 return rsi_write_multiple(adapter, 472 endpoint, 473 (u8 *)pkt, 474 len); 475 } 476 477 static int rsi_usb_master_reg_read(struct rsi_hw *adapter, u32 reg, 478 u32 *value, u16 len) 479 { 480 struct usb_device *usbdev = 481 ((struct rsi_91x_usbdev *)adapter->rsi_dev)->usbdev; 482 u16 temp; 483 int ret; 484 485 ret = rsi_usb_reg_read(usbdev, reg, &temp, len); 486 if (ret < 0) 487 return ret; 488 *value = temp; 489 490 return 0; 491 } 492 493 static int rsi_usb_master_reg_write(struct rsi_hw *adapter, 494 unsigned long reg, 495 unsigned long value, u16 len) 496 { 497 struct usb_device *usbdev = 498 ((struct rsi_91x_usbdev *)adapter->rsi_dev)->usbdev; 499 500 return rsi_usb_reg_write(usbdev, reg, value, len); 501 } 502 503 static int rsi_usb_load_data_master_write(struct rsi_hw *adapter, 504 u32 base_address, 505 u32 instructions_sz, u16 block_size, 506 u8 *ta_firmware) 507 { 508 u16 num_blocks; 509 u32 cur_indx, i; 510 u8 temp_buf[256]; 511 int status; 512 513 num_blocks = instructions_sz / block_size; 514 rsi_dbg(INFO_ZONE, "num_blocks: %d\n", num_blocks); 515 516 for (cur_indx = 0, i = 0; i < num_blocks; i++, cur_indx += block_size) { 517 memcpy(temp_buf, ta_firmware + cur_indx, block_size); 518 status = rsi_usb_write_register_multiple(adapter, base_address, 519 (u8 *)(temp_buf), 520 block_size); 521 if (status < 0) 522 return status; 523 524 rsi_dbg(INFO_ZONE, "%s: loading block: %d\n", __func__, i); 525 base_address += block_size; 526 } 527 528 if (instructions_sz % block_size) { 529 memset(temp_buf, 0, block_size); 530 memcpy(temp_buf, ta_firmware + cur_indx, 531 instructions_sz % block_size); 532 status = rsi_usb_write_register_multiple 533 (adapter, base_address, 534 (u8 *)temp_buf, 535 instructions_sz % block_size); 536 if (status < 0) 537 return status; 538 rsi_dbg(INFO_ZONE, 539 "Written Last Block in Address 0x%x Successfully\n", 540 cur_indx); 541 } 542 return 0; 543 } 544 545 static struct rsi_host_intf_ops usb_host_intf_ops = { 546 .write_pkt = rsi_usb_host_intf_write_pkt, 547 .read_reg_multiple = rsi_usb_read_register_multiple, 548 .write_reg_multiple = rsi_usb_write_register_multiple, 549 .master_reg_read = rsi_usb_master_reg_read, 550 .master_reg_write = rsi_usb_master_reg_write, 551 .load_data_master_write = rsi_usb_load_data_master_write, 552 }; 553 554 /** 555 * rsi_deinit_usb_interface() - This function deinitializes the usb interface. 556 * @adapter: Pointer to the adapter structure. 557 * 558 * Return: None. 559 */ 560 static void rsi_deinit_usb_interface(struct rsi_hw *adapter) 561 { 562 struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev; 563 564 rsi_kill_thread(&dev->rx_thread); 565 566 usb_free_urb(dev->rx_cb[0].rx_urb); 567 if (adapter->priv->coex_mode > 1) 568 usb_free_urb(dev->rx_cb[1].rx_urb); 569 570 kfree(dev->tx_buffer); 571 } 572 573 static int rsi_usb_init_rx(struct rsi_hw *adapter) 574 { 575 struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev; 576 struct rx_usb_ctrl_block *rx_cb; 577 u8 idx, num_rx_cb; 578 579 num_rx_cb = (adapter->priv->coex_mode > 1 ? 2 : 1); 580 581 for (idx = 0; idx < num_rx_cb; idx++) { 582 rx_cb = &dev->rx_cb[idx]; 583 584 rx_cb->rx_urb = usb_alloc_urb(0, GFP_KERNEL); 585 if (!rx_cb->rx_urb) { 586 rsi_dbg(ERR_ZONE, "Failed alloc rx urb[%d]\n", idx); 587 goto err; 588 } 589 rx_cb->ep_num = idx + 1; 590 rx_cb->data = (void *)dev; 591 } 592 skb_queue_head_init(&dev->rx_q); 593 rsi_init_event(&dev->rx_thread.event); 594 if (rsi_create_kthread(adapter->priv, &dev->rx_thread, 595 rsi_usb_rx_thread, "RX-Thread")) { 596 rsi_dbg(ERR_ZONE, "%s: Unable to init rx thrd\n", __func__); 597 goto err; 598 } 599 600 return 0; 601 602 err: 603 usb_free_urb(dev->rx_cb[0].rx_urb); 604 if (adapter->priv->coex_mode > 1) 605 usb_free_urb(dev->rx_cb[1].rx_urb); 606 607 return -1; 608 } 609 610 /** 611 * rsi_init_usb_interface() - This function initializes the usb interface. 612 * @adapter: Pointer to the adapter structure. 613 * @pfunction: Pointer to USB interface structure. 614 * 615 * Return: 0 on success, a negative error code on failure. 616 */ 617 static int rsi_init_usb_interface(struct rsi_hw *adapter, 618 struct usb_interface *pfunction) 619 { 620 struct rsi_91x_usbdev *rsi_dev; 621 int status; 622 623 rsi_dev = kzalloc(sizeof(*rsi_dev), GFP_KERNEL); 624 if (!rsi_dev) 625 return -ENOMEM; 626 627 adapter->rsi_dev = rsi_dev; 628 rsi_dev->usbdev = interface_to_usbdev(pfunction); 629 rsi_dev->priv = (void *)adapter; 630 631 if (rsi_find_bulk_in_and_out_endpoints(pfunction, adapter)) { 632 status = -EINVAL; 633 goto fail_eps; 634 } 635 636 adapter->device = &pfunction->dev; 637 usb_set_intfdata(pfunction, adapter); 638 639 rsi_dev->tx_buffer = kmalloc(2048, GFP_KERNEL); 640 if (!rsi_dev->tx_buffer) { 641 status = -ENOMEM; 642 goto fail_eps; 643 } 644 645 if (rsi_usb_init_rx(adapter)) { 646 rsi_dbg(ERR_ZONE, "Failed to init RX handle\n"); 647 status = -ENOMEM; 648 goto fail_rx; 649 } 650 651 rsi_dev->tx_blk_size = 252; 652 adapter->block_size = rsi_dev->tx_blk_size; 653 654 /* Initializing function callbacks */ 655 adapter->check_hw_queue_status = rsi_usb_check_queue_status; 656 adapter->determine_event_timeout = rsi_usb_event_timeout; 657 adapter->rsi_host_intf = RSI_HOST_INTF_USB; 658 adapter->host_intf_ops = &usb_host_intf_ops; 659 660 #ifdef CONFIG_RSI_DEBUGFS 661 /* In USB, one less than the MAX_DEBUGFS_ENTRIES entries is required */ 662 adapter->num_debugfs_entries = (MAX_DEBUGFS_ENTRIES - 1); 663 #endif 664 665 rsi_dbg(INIT_ZONE, "%s: Enabled the interface\n", __func__); 666 return 0; 667 668 fail_rx: 669 kfree(rsi_dev->tx_buffer); 670 671 fail_eps: 672 673 return status; 674 } 675 676 static int usb_ulp_read_write(struct rsi_hw *adapter, u16 addr, u32 data, 677 u16 len_in_bits) 678 { 679 int ret; 680 681 ret = rsi_usb_master_reg_write 682 (adapter, RSI_GSPI_DATA_REG1, 683 ((addr << 6) | ((data >> 16) & 0xffff)), 2); 684 if (ret < 0) 685 return ret; 686 687 ret = rsi_usb_master_reg_write(adapter, RSI_GSPI_DATA_REG0, 688 (data & 0xffff), 2); 689 if (ret < 0) 690 return ret; 691 692 /* Initializing GSPI for ULP read/writes */ 693 rsi_usb_master_reg_write(adapter, RSI_GSPI_CTRL_REG0, 694 RSI_GSPI_CTRL_REG0_VALUE, 2); 695 696 ret = rsi_usb_master_reg_write(adapter, RSI_GSPI_CTRL_REG1, 697 ((len_in_bits - 1) | RSI_GSPI_TRIG), 2); 698 if (ret < 0) 699 return ret; 700 701 msleep(20); 702 703 return 0; 704 } 705 706 static int rsi_reset_card(struct rsi_hw *adapter) 707 { 708 int ret; 709 710 rsi_dbg(INFO_ZONE, "Resetting Card...\n"); 711 rsi_usb_master_reg_write(adapter, RSI_TA_HOLD_REG, 0xE, 4); 712 713 /* This msleep will ensure Thread-Arch processor to go to hold 714 * and any pending dma transfers to rf in device to finish. 715 */ 716 msleep(100); 717 718 ret = rsi_usb_master_reg_write(adapter, SWBL_REGOUT, 719 RSI_FW_WDT_DISABLE_REQ, 720 RSI_COMMON_REG_SIZE); 721 if (ret < 0) { 722 rsi_dbg(ERR_ZONE, "Disabling firmware watchdog timer failed\n"); 723 goto fail; 724 } 725 726 if (adapter->device_model != RSI_DEV_9116) { 727 ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_1, 728 RSI_ULP_WRITE_2, 32); 729 if (ret < 0) 730 goto fail; 731 ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_2, 732 RSI_ULP_WRITE_0, 32); 733 if (ret < 0) 734 goto fail; 735 ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_DELAY_TIMER_1, 736 RSI_ULP_WRITE_50, 32); 737 if (ret < 0) 738 goto fail; 739 ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_DELAY_TIMER_2, 740 RSI_ULP_WRITE_0, 32); 741 if (ret < 0) 742 goto fail; 743 ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_ENABLE, 744 RSI_ULP_TIMER_ENABLE, 32); 745 if (ret < 0) 746 goto fail; 747 } else { 748 ret = rsi_usb_master_reg_write(adapter, 749 NWP_WWD_INTERRUPT_TIMER, 750 NWP_WWD_INT_TIMER_CLKS, 751 RSI_9116_REG_SIZE); 752 if (ret < 0) 753 goto fail; 754 ret = rsi_usb_master_reg_write(adapter, 755 NWP_WWD_SYSTEM_RESET_TIMER, 756 NWP_WWD_SYS_RESET_TIMER_CLKS, 757 RSI_9116_REG_SIZE); 758 if (ret < 0) 759 goto fail; 760 ret = rsi_usb_master_reg_write(adapter, 761 NWP_WWD_MODE_AND_RSTART, 762 NWP_WWD_TIMER_DISABLE, 763 RSI_9116_REG_SIZE); 764 if (ret < 0) 765 goto fail; 766 } 767 768 rsi_dbg(INFO_ZONE, "Reset card done\n"); 769 return ret; 770 771 fail: 772 rsi_dbg(ERR_ZONE, "Reset card failed\n"); 773 return ret; 774 } 775 776 /** 777 * rsi_probe() - This function is called by kernel when the driver provided 778 * Vendor and device IDs are matched. All the initialization 779 * work is done here. 780 * @pfunction: Pointer to the USB interface structure. 781 * @id: Pointer to the usb_device_id structure. 782 * 783 * Return: 0 on success, a negative error code on failure. 784 */ 785 static int rsi_probe(struct usb_interface *pfunction, 786 const struct usb_device_id *id) 787 { 788 struct rsi_hw *adapter; 789 struct rsi_91x_usbdev *dev; 790 u16 fw_status; 791 int status; 792 793 rsi_dbg(INIT_ZONE, "%s: Init function called\n", __func__); 794 795 adapter = rsi_91x_init(dev_oper_mode); 796 if (!adapter) { 797 rsi_dbg(ERR_ZONE, "%s: Failed to init os intf ops\n", 798 __func__); 799 return -ENOMEM; 800 } 801 adapter->rsi_host_intf = RSI_HOST_INTF_USB; 802 803 status = rsi_init_usb_interface(adapter, pfunction); 804 if (status) { 805 rsi_dbg(ERR_ZONE, "%s: Failed to init usb interface\n", 806 __func__); 807 goto err; 808 } 809 810 rsi_dbg(ERR_ZONE, "%s: Initialized os intf ops\n", __func__); 811 812 if (id->idProduct == RSI_USB_PID_9113) { 813 rsi_dbg(INIT_ZONE, "%s: 9113 module detected\n", __func__); 814 adapter->device_model = RSI_DEV_9113; 815 } else if (id->idProduct == RSI_USB_PID_9116) { 816 rsi_dbg(INIT_ZONE, "%s: 9116 module detected\n", __func__); 817 adapter->device_model = RSI_DEV_9116; 818 } else { 819 rsi_dbg(ERR_ZONE, "%s: Unsupported RSI device id 0x%x\n", 820 __func__, id->idProduct); 821 status = -ENODEV; 822 goto err1; 823 } 824 825 dev = (struct rsi_91x_usbdev *)adapter->rsi_dev; 826 827 status = rsi_usb_reg_read(dev->usbdev, FW_STATUS_REG, &fw_status, 2); 828 if (status < 0) 829 goto err1; 830 else 831 fw_status &= 1; 832 833 if (!fw_status) { 834 rsi_dbg(INIT_ZONE, "Loading firmware...\n"); 835 status = rsi_hal_device_init(adapter); 836 if (status) { 837 rsi_dbg(ERR_ZONE, "%s: Failed in device init\n", 838 __func__); 839 goto err1; 840 } 841 rsi_dbg(INIT_ZONE, "%s: Device Init Done\n", __func__); 842 } 843 844 status = rsi_rx_urb_submit(adapter, WLAN_EP, GFP_KERNEL); 845 if (status) 846 goto err1; 847 848 if (adapter->priv->coex_mode > 1) { 849 status = rsi_rx_urb_submit(adapter, BT_EP, GFP_KERNEL); 850 if (status) 851 goto err_kill_wlan_urb; 852 } 853 854 return 0; 855 856 err_kill_wlan_urb: 857 rsi_rx_urb_kill(adapter, WLAN_EP); 858 err1: 859 rsi_deinit_usb_interface(adapter); 860 err: 861 rsi_91x_deinit(adapter); 862 rsi_dbg(ERR_ZONE, "%s: Failed in probe...Exiting\n", __func__); 863 return status; 864 } 865 866 /** 867 * rsi_disconnect() - This function performs the reverse of the probe function, 868 * it deinitialize the driver structure. 869 * @pfunction: Pointer to the USB interface structure. 870 * 871 * Return: None. 872 */ 873 static void rsi_disconnect(struct usb_interface *pfunction) 874 { 875 struct rsi_hw *adapter = usb_get_intfdata(pfunction); 876 877 if (!adapter) 878 return; 879 880 rsi_mac80211_detach(adapter); 881 882 if (IS_ENABLED(CONFIG_RSI_COEX) && adapter->priv->coex_mode > 1 && 883 adapter->priv->bt_adapter) { 884 rsi_bt_ops.detach(adapter->priv->bt_adapter); 885 adapter->priv->bt_adapter = NULL; 886 } 887 888 if (adapter->priv->coex_mode > 1) 889 rsi_rx_urb_kill(adapter, BT_EP); 890 rsi_rx_urb_kill(adapter, WLAN_EP); 891 892 rsi_reset_card(adapter); 893 rsi_deinit_usb_interface(adapter); 894 rsi_91x_deinit(adapter); 895 896 rsi_dbg(INFO_ZONE, "%s: Deinitialization completed\n", __func__); 897 } 898 899 #ifdef CONFIG_PM 900 static int rsi_suspend(struct usb_interface *intf, pm_message_t message) 901 { 902 /* Not yet implemented */ 903 return -ENOSYS; 904 } 905 906 static int rsi_resume(struct usb_interface *intf) 907 { 908 /* Not yet implemented */ 909 return -ENOSYS; 910 } 911 #endif 912 913 static const struct usb_device_id rsi_dev_table[] = { 914 { USB_DEVICE(RSI_USB_VENDOR_ID, RSI_USB_PID_9113) }, 915 { USB_DEVICE(RSI_USB_VENDOR_ID, RSI_USB_PID_9116) }, 916 { /* Blank */}, 917 }; 918 919 static struct usb_driver rsi_driver = { 920 .name = "RSI-USB WLAN", 921 .probe = rsi_probe, 922 .disconnect = rsi_disconnect, 923 .id_table = rsi_dev_table, 924 #ifdef CONFIG_PM 925 .suspend = rsi_suspend, 926 .resume = rsi_resume, 927 #endif 928 }; 929 930 module_usb_driver(rsi_driver); 931 932 MODULE_AUTHOR("Redpine Signals Inc"); 933 MODULE_DESCRIPTION("Common USB layer for RSI drivers"); 934 MODULE_DEVICE_TABLE(usb, rsi_dev_table); 935 MODULE_FIRMWARE(FIRMWARE_RSI9113); 936 MODULE_VERSION("0.1"); 937 MODULE_LICENSE("Dual BSD/GPL"); 938