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 "rsi_usb.h" 20 21 /** 22 * rsi_usb_card_write() - This function writes to the USB Card. 23 * @adapter: Pointer to the adapter structure. 24 * @buf: Pointer to the buffer from where the data has to be taken. 25 * @len: Length to be written. 26 * @endpoint: Type of endpoint. 27 * 28 * Return: status: 0 on success, a negative error code on failure. 29 */ 30 static int rsi_usb_card_write(struct rsi_hw *adapter, 31 void *buf, 32 u16 len, 33 u8 endpoint) 34 { 35 struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev; 36 int status; 37 s32 transfer; 38 39 status = usb_bulk_msg(dev->usbdev, 40 usb_sndbulkpipe(dev->usbdev, 41 dev->bulkout_endpoint_addr[endpoint - 1]), 42 buf, 43 len, 44 &transfer, 45 HZ * 5); 46 47 if (status < 0) { 48 rsi_dbg(ERR_ZONE, 49 "Card write failed with error code :%10d\n", status); 50 dev->write_fail = 1; 51 } 52 return status; 53 } 54 55 /** 56 * rsi_write_multiple() - This function writes multiple bytes of information 57 * to the USB card. 58 * @adapter: Pointer to the adapter structure. 59 * @addr: Address of the register. 60 * @data: Pointer to the data that has to be written. 61 * @count: Number of multiple bytes to be written. 62 * 63 * Return: 0 on success, a negative error code on failure. 64 */ 65 static int rsi_write_multiple(struct rsi_hw *adapter, 66 u8 endpoint, 67 u8 *data, 68 u32 count) 69 { 70 struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev; 71 u8 *seg = dev->tx_buffer; 72 73 if (dev->write_fail) 74 return 0; 75 76 if (endpoint == MGMT_EP) { 77 memset(seg, 0, RSI_USB_TX_HEAD_ROOM); 78 memcpy(seg + RSI_USB_TX_HEAD_ROOM, data, count); 79 } else { 80 seg = ((u8 *)data - RSI_USB_TX_HEAD_ROOM); 81 } 82 83 return rsi_usb_card_write(adapter, 84 seg, 85 count + RSI_USB_TX_HEAD_ROOM, 86 endpoint); 87 } 88 89 /** 90 * rsi_find_bulk_in_and_out_endpoints() - This function initializes the bulk 91 * endpoints to the device. 92 * @interface: Pointer to the USB interface structure. 93 * @adapter: Pointer to the adapter structure. 94 * 95 * Return: ret_val: 0 on success, -ENOMEM on failure. 96 */ 97 static int rsi_find_bulk_in_and_out_endpoints(struct usb_interface *interface, 98 struct rsi_hw *adapter) 99 { 100 struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev; 101 struct usb_host_interface *iface_desc; 102 struct usb_endpoint_descriptor *endpoint; 103 __le16 buffer_size; 104 int ii, bep_found = 0; 105 106 iface_desc = &(interface->altsetting[0]); 107 108 for (ii = 0; ii < iface_desc->desc.bNumEndpoints; ++ii) { 109 endpoint = &(iface_desc->endpoint[ii].desc); 110 111 if ((!(dev->bulkin_endpoint_addr)) && 112 (endpoint->bEndpointAddress & USB_DIR_IN) && 113 ((endpoint->bmAttributes & 114 USB_ENDPOINT_XFERTYPE_MASK) == 115 USB_ENDPOINT_XFER_BULK)) { 116 buffer_size = endpoint->wMaxPacketSize; 117 dev->bulkin_size = buffer_size; 118 dev->bulkin_endpoint_addr = 119 endpoint->bEndpointAddress; 120 } 121 122 if (!dev->bulkout_endpoint_addr[bep_found] && 123 !(endpoint->bEndpointAddress & USB_DIR_IN) && 124 ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == 125 USB_ENDPOINT_XFER_BULK)) { 126 dev->bulkout_endpoint_addr[bep_found] = 127 endpoint->bEndpointAddress; 128 buffer_size = endpoint->wMaxPacketSize; 129 dev->bulkout_size[bep_found] = buffer_size; 130 bep_found++; 131 } 132 133 if (bep_found >= MAX_BULK_EP) 134 break; 135 } 136 137 if (!(dev->bulkin_endpoint_addr) && 138 (dev->bulkout_endpoint_addr[0])) 139 return -EINVAL; 140 141 return 0; 142 } 143 144 /* rsi_usb_reg_read() - This function reads data from given register address. 145 * @usbdev: Pointer to the usb_device structure. 146 * @reg: Address of the register to be read. 147 * @value: Value to be read. 148 * @len: length of data to be read. 149 * 150 * Return: status: 0 on success, a negative error code on failure. 151 */ 152 static int rsi_usb_reg_read(struct usb_device *usbdev, 153 u32 reg, 154 u16 *value, 155 u16 len) 156 { 157 u8 *buf; 158 int status = -ENOMEM; 159 160 buf = kmalloc(0x04, GFP_KERNEL); 161 if (!buf) 162 return status; 163 164 status = usb_control_msg(usbdev, 165 usb_rcvctrlpipe(usbdev, 0), 166 USB_VENDOR_REGISTER_READ, 167 USB_TYPE_VENDOR, 168 ((reg & 0xffff0000) >> 16), (reg & 0xffff), 169 (void *)buf, 170 len, 171 HZ * 5); 172 173 *value = (buf[0] | (buf[1] << 8)); 174 if (status < 0) { 175 rsi_dbg(ERR_ZONE, 176 "%s: Reg read failed with error code :%d\n", 177 __func__, status); 178 } 179 kfree(buf); 180 181 return status; 182 } 183 184 /** 185 * rsi_usb_reg_write() - This function writes the given data into the given 186 * register address. 187 * @usbdev: Pointer to the usb_device structure. 188 * @reg: Address of the register. 189 * @value: Value to write. 190 * @len: Length of data to be written. 191 * 192 * Return: status: 0 on success, a negative error code on failure. 193 */ 194 static int rsi_usb_reg_write(struct usb_device *usbdev, 195 u32 reg, 196 u16 value, 197 u16 len) 198 { 199 u8 *usb_reg_buf; 200 int status = -ENOMEM; 201 202 usb_reg_buf = kmalloc(0x04, GFP_KERNEL); 203 if (!usb_reg_buf) 204 return status; 205 206 usb_reg_buf[0] = (value & 0x00ff); 207 usb_reg_buf[1] = (value & 0xff00) >> 8; 208 usb_reg_buf[2] = 0x0; 209 usb_reg_buf[3] = 0x0; 210 211 status = usb_control_msg(usbdev, 212 usb_sndctrlpipe(usbdev, 0), 213 USB_VENDOR_REGISTER_WRITE, 214 USB_TYPE_VENDOR, 215 ((reg & 0xffff0000) >> 16), 216 (reg & 0xffff), 217 (void *)usb_reg_buf, 218 len, 219 HZ * 5); 220 if (status < 0) { 221 rsi_dbg(ERR_ZONE, 222 "%s: Reg write failed with error code :%d\n", 223 __func__, status); 224 } 225 kfree(usb_reg_buf); 226 227 return status; 228 } 229 230 /** 231 * rsi_rx_done_handler() - This function is called when a packet is received 232 * from USB stack. This is callback to recieve done. 233 * @urb: Received URB. 234 * 235 * Return: None. 236 */ 237 static void rsi_rx_done_handler(struct urb *urb) 238 { 239 struct rsi_hw *adapter = urb->context; 240 struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev; 241 242 if (urb->status) 243 return; 244 245 rsi_set_event(&dev->rx_thread.event); 246 } 247 248 /** 249 * rsi_rx_urb_submit() - This function submits the given URB to the USB stack. 250 * @adapter: Pointer to the adapter structure. 251 * 252 * Return: 0 on success, a negative error code on failure. 253 */ 254 static int rsi_rx_urb_submit(struct rsi_hw *adapter) 255 { 256 struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev; 257 struct urb *urb = dev->rx_usb_urb[0]; 258 int status; 259 260 usb_fill_bulk_urb(urb, 261 dev->usbdev, 262 usb_rcvbulkpipe(dev->usbdev, 263 dev->bulkin_endpoint_addr), 264 urb->transfer_buffer, 265 3000, 266 rsi_rx_done_handler, 267 adapter); 268 269 status = usb_submit_urb(urb, GFP_KERNEL); 270 if (status) 271 rsi_dbg(ERR_ZONE, "%s: Failed in urb submission\n", __func__); 272 273 return status; 274 } 275 276 /** 277 * rsi_usb_write_register_multiple() - This function writes multiple bytes of 278 * information to multiple registers. 279 * @adapter: Pointer to the adapter structure. 280 * @addr: Address of the register. 281 * @data: Pointer to the data that has to be written. 282 * @count: Number of multiple bytes to be written on to the registers. 283 * 284 * Return: status: 0 on success, a negative error code on failure. 285 */ 286 int rsi_usb_write_register_multiple(struct rsi_hw *adapter, 287 u32 addr, 288 u8 *data, 289 u32 count) 290 { 291 struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev; 292 u8 *buf; 293 u8 transfer; 294 int status = 0; 295 296 buf = kzalloc(4096, GFP_KERNEL); 297 if (!buf) 298 return -ENOMEM; 299 300 while (count) { 301 transfer = (u8)(min_t(u32, count, 4096)); 302 memcpy(buf, data, transfer); 303 status = usb_control_msg(dev->usbdev, 304 usb_sndctrlpipe(dev->usbdev, 0), 305 USB_VENDOR_REGISTER_WRITE, 306 USB_TYPE_VENDOR, 307 ((addr & 0xffff0000) >> 16), 308 (addr & 0xffff), 309 (void *)buf, 310 transfer, 311 HZ * 5); 312 if (status < 0) { 313 rsi_dbg(ERR_ZONE, 314 "Reg write failed with error code :%d\n", 315 status); 316 } else { 317 count -= transfer; 318 data += transfer; 319 addr += transfer; 320 } 321 } 322 323 kfree(buf); 324 return 0; 325 } 326 327 /** 328 *rsi_usb_host_intf_write_pkt() - This function writes the packet to the 329 * USB card. 330 * @adapter: Pointer to the adapter structure. 331 * @pkt: Pointer to the data to be written on to the card. 332 * @len: Length of the data to be written on to the card. 333 * 334 * Return: 0 on success, a negative error code on failure. 335 */ 336 static int rsi_usb_host_intf_write_pkt(struct rsi_hw *adapter, 337 u8 *pkt, 338 u32 len) 339 { 340 u32 queueno = ((pkt[1] >> 4) & 0xf); 341 u8 endpoint; 342 343 endpoint = ((queueno == RSI_WIFI_MGMT_Q) ? MGMT_EP : DATA_EP); 344 345 return rsi_write_multiple(adapter, 346 endpoint, 347 (u8 *)pkt, 348 len); 349 } 350 351 /** 352 * rsi_deinit_usb_interface() - This function deinitializes the usb interface. 353 * @adapter: Pointer to the adapter structure. 354 * 355 * Return: None. 356 */ 357 static void rsi_deinit_usb_interface(struct rsi_hw *adapter) 358 { 359 struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev; 360 361 rsi_kill_thread(&dev->rx_thread); 362 usb_free_urb(dev->rx_usb_urb[0]); 363 kfree(adapter->priv->rx_data_pkt); 364 kfree(dev->tx_buffer); 365 } 366 367 /** 368 * rsi_init_usb_interface() - This function initializes the usb interface. 369 * @adapter: Pointer to the adapter structure. 370 * @pfunction: Pointer to USB interface structure. 371 * 372 * Return: 0 on success, a negative error code on failure. 373 */ 374 static int rsi_init_usb_interface(struct rsi_hw *adapter, 375 struct usb_interface *pfunction) 376 { 377 struct rsi_91x_usbdev *rsi_dev; 378 struct rsi_common *common = adapter->priv; 379 int status; 380 381 rsi_dev = kzalloc(sizeof(*rsi_dev), GFP_KERNEL); 382 if (!rsi_dev) 383 return -ENOMEM; 384 385 adapter->rsi_dev = rsi_dev; 386 rsi_dev->usbdev = interface_to_usbdev(pfunction); 387 388 if (rsi_find_bulk_in_and_out_endpoints(pfunction, adapter)) 389 return -EINVAL; 390 391 adapter->device = &pfunction->dev; 392 usb_set_intfdata(pfunction, adapter); 393 394 common->rx_data_pkt = kmalloc(2048, GFP_KERNEL); 395 if (!common->rx_data_pkt) { 396 rsi_dbg(ERR_ZONE, "%s: Failed to allocate memory\n", 397 __func__); 398 return -ENOMEM; 399 } 400 401 rsi_dev->tx_buffer = kmalloc(2048, GFP_KERNEL); 402 if (!rsi_dev->tx_buffer) { 403 status = -ENOMEM; 404 goto fail_tx; 405 } 406 rsi_dev->rx_usb_urb[0] = usb_alloc_urb(0, GFP_KERNEL); 407 if (!rsi_dev->rx_usb_urb[0]) { 408 status = -ENOMEM; 409 goto fail_rx; 410 } 411 rsi_dev->rx_usb_urb[0]->transfer_buffer = adapter->priv->rx_data_pkt; 412 rsi_dev->tx_blk_size = 252; 413 414 /* Initializing function callbacks */ 415 adapter->rx_urb_submit = rsi_rx_urb_submit; 416 adapter->host_intf_write_pkt = rsi_usb_host_intf_write_pkt; 417 adapter->check_hw_queue_status = rsi_usb_check_queue_status; 418 adapter->determine_event_timeout = rsi_usb_event_timeout; 419 420 rsi_init_event(&rsi_dev->rx_thread.event); 421 status = rsi_create_kthread(common, &rsi_dev->rx_thread, 422 rsi_usb_rx_thread, "RX-Thread"); 423 if (status) { 424 rsi_dbg(ERR_ZONE, "%s: Unable to init rx thrd\n", __func__); 425 goto fail_thread; 426 } 427 428 #ifdef CONFIG_RSI_DEBUGFS 429 /* In USB, one less than the MAX_DEBUGFS_ENTRIES entries is required */ 430 adapter->num_debugfs_entries = (MAX_DEBUGFS_ENTRIES - 1); 431 #endif 432 433 rsi_dbg(INIT_ZONE, "%s: Enabled the interface\n", __func__); 434 return 0; 435 436 fail_thread: 437 usb_free_urb(rsi_dev->rx_usb_urb[0]); 438 fail_rx: 439 kfree(rsi_dev->tx_buffer); 440 fail_tx: 441 kfree(common->rx_data_pkt); 442 return status; 443 } 444 445 /** 446 * rsi_probe() - This function is called by kernel when the driver provided 447 * Vendor and device IDs are matched. All the initialization 448 * work is done here. 449 * @pfunction: Pointer to the USB interface structure. 450 * @id: Pointer to the usb_device_id structure. 451 * 452 * Return: 0 on success, a negative error code on failure. 453 */ 454 static int rsi_probe(struct usb_interface *pfunction, 455 const struct usb_device_id *id) 456 { 457 struct rsi_hw *adapter; 458 struct rsi_91x_usbdev *dev; 459 u16 fw_status; 460 int status; 461 462 rsi_dbg(INIT_ZONE, "%s: Init function called\n", __func__); 463 464 adapter = rsi_91x_init(); 465 if (!adapter) { 466 rsi_dbg(ERR_ZONE, "%s: Failed to init os intf ops\n", 467 __func__); 468 return -ENOMEM; 469 } 470 471 status = rsi_init_usb_interface(adapter, pfunction); 472 if (status) { 473 rsi_dbg(ERR_ZONE, "%s: Failed to init usb interface\n", 474 __func__); 475 goto err; 476 } 477 478 rsi_dbg(ERR_ZONE, "%s: Initialized os intf ops\n", __func__); 479 480 dev = (struct rsi_91x_usbdev *)adapter->rsi_dev; 481 482 status = rsi_usb_reg_read(dev->usbdev, FW_STATUS_REG, &fw_status, 2); 483 if (status) 484 goto err1; 485 else 486 fw_status &= 1; 487 488 if (!fw_status) { 489 status = rsi_usb_device_init(adapter->priv); 490 if (status) { 491 rsi_dbg(ERR_ZONE, "%s: Failed in device init\n", 492 __func__); 493 goto err1; 494 } 495 496 status = rsi_usb_reg_write(dev->usbdev, 497 USB_INTERNAL_REG_1, 498 RSI_USB_READY_MAGIC_NUM, 1); 499 if (status) 500 goto err1; 501 rsi_dbg(INIT_ZONE, "%s: Performed device init\n", __func__); 502 } 503 504 status = rsi_rx_urb_submit(adapter); 505 if (status) 506 goto err1; 507 508 return 0; 509 err1: 510 rsi_deinit_usb_interface(adapter); 511 err: 512 rsi_91x_deinit(adapter); 513 rsi_dbg(ERR_ZONE, "%s: Failed in probe...Exiting\n", __func__); 514 return status; 515 } 516 517 /** 518 * rsi_disconnect() - This function performs the reverse of the probe function, 519 * it deintialize the driver structure. 520 * @pfunction: Pointer to the USB interface structure. 521 * 522 * Return: None. 523 */ 524 static void rsi_disconnect(struct usb_interface *pfunction) 525 { 526 struct rsi_hw *adapter = usb_get_intfdata(pfunction); 527 528 if (!adapter) 529 return; 530 531 rsi_mac80211_detach(adapter); 532 rsi_deinit_usb_interface(adapter); 533 rsi_91x_deinit(adapter); 534 535 rsi_dbg(INFO_ZONE, "%s: Deinitialization completed\n", __func__); 536 } 537 538 #ifdef CONFIG_PM 539 static int rsi_suspend(struct usb_interface *intf, pm_message_t message) 540 { 541 /* Not yet implemented */ 542 return -ENOSYS; 543 } 544 545 static int rsi_resume(struct usb_interface *intf) 546 { 547 /* Not yet implemented */ 548 return -ENOSYS; 549 } 550 #endif 551 552 static const struct usb_device_id rsi_dev_table[] = { 553 { USB_DEVICE(0x0303, 0x0100) }, 554 { USB_DEVICE(0x041B, 0x0301) }, 555 { USB_DEVICE(0x041B, 0x0201) }, 556 { USB_DEVICE(0x041B, 0x9330) }, 557 { /* Blank */}, 558 }; 559 560 static struct usb_driver rsi_driver = { 561 .name = "RSI-USB WLAN", 562 .probe = rsi_probe, 563 .disconnect = rsi_disconnect, 564 .id_table = rsi_dev_table, 565 #ifdef CONFIG_PM 566 .suspend = rsi_suspend, 567 .resume = rsi_resume, 568 #endif 569 }; 570 571 module_usb_driver(rsi_driver); 572 573 MODULE_AUTHOR("Redpine Signals Inc"); 574 MODULE_DESCRIPTION("Common USB layer for RSI drivers"); 575 MODULE_SUPPORTED_DEVICE("RSI-91x"); 576 MODULE_DEVICE_TABLE(usb, rsi_dev_table); 577 MODULE_FIRMWARE(FIRMWARE_RSI9113); 578 MODULE_VERSION("0.1"); 579 MODULE_LICENSE("Dual BSD/GPL"); 580