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 */
rsi_usb_card_write(struct rsi_hw * adapter,u8 * buf,u16 len,u8 endpoint)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 */
rsi_write_multiple(struct rsi_hw * adapter,u8 endpoint,u8 * data,u32 count)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 */
rsi_find_bulk_in_and_out_endpoints(struct usb_interface * interface,struct rsi_hw * adapter)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 */
rsi_usb_reg_read(struct usb_device * usbdev,u32 reg,u16 * value,u16 len)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 */
rsi_usb_reg_write(struct usb_device * usbdev,u32 reg,u16 value,u16 len)215 static int rsi_usb_reg_write(struct usb_device *usbdev,
216 u32 reg,
217 u16 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] = (value & 0x00ff);
231 usb_reg_buf[1] = (value & 0xff00) >> 8;
232 usb_reg_buf[2] = 0x0;
233 usb_reg_buf[3] = 0x0;
234
235 status = usb_control_msg(usbdev,
236 usb_sndctrlpipe(usbdev, 0),
237 USB_VENDOR_REGISTER_WRITE,
238 RSI_USB_REQ_OUT,
239 ((reg & 0xffff0000) >> 16),
240 (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 recieve done.
257 * @urb: Received URB.
258 *
259 * Return: None.
260 */
rsi_rx_done_handler(struct urb * urb)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 goto out;
269
270 if (urb->actual_length <= 0 ||
271 urb->actual_length > rx_cb->rx_skb->len) {
272 rsi_dbg(INFO_ZONE, "%s: Invalid packet length = %d\n",
273 __func__, urb->actual_length);
274 goto out;
275 }
276 if (skb_queue_len(&dev->rx_q) >= RSI_MAX_RX_PKTS) {
277 rsi_dbg(INFO_ZONE, "Max RX packets reached\n");
278 goto out;
279 }
280 skb_trim(rx_cb->rx_skb, urb->actual_length);
281 skb_queue_tail(&dev->rx_q, rx_cb->rx_skb);
282
283 rsi_set_event(&dev->rx_thread.event);
284 status = 0;
285
286 out:
287 if (rsi_rx_urb_submit(dev->priv, rx_cb->ep_num, GFP_ATOMIC))
288 rsi_dbg(ERR_ZONE, "%s: Failed in urb submission", __func__);
289
290 if (status)
291 dev_kfree_skb(rx_cb->rx_skb);
292 }
293
rsi_rx_urb_kill(struct rsi_hw * adapter,u8 ep_num)294 static void rsi_rx_urb_kill(struct rsi_hw *adapter, u8 ep_num)
295 {
296 struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
297 struct rx_usb_ctrl_block *rx_cb = &dev->rx_cb[ep_num - 1];
298 struct urb *urb = rx_cb->rx_urb;
299
300 usb_kill_urb(urb);
301 }
302
303 /**
304 * rsi_rx_urb_submit() - This function submits the given URB to the USB stack.
305 * @adapter: Pointer to the adapter structure.
306 *
307 * Return: 0 on success, a negative error code on failure.
308 */
rsi_rx_urb_submit(struct rsi_hw * adapter,u8 ep_num,gfp_t mem_flags)309 static int rsi_rx_urb_submit(struct rsi_hw *adapter, u8 ep_num, gfp_t mem_flags)
310 {
311 struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
312 struct rx_usb_ctrl_block *rx_cb = &dev->rx_cb[ep_num - 1];
313 struct urb *urb = rx_cb->rx_urb;
314 int status;
315 struct sk_buff *skb;
316 u8 dword_align_bytes = 0;
317
318 #define RSI_MAX_RX_USB_PKT_SIZE 3000
319 skb = dev_alloc_skb(RSI_MAX_RX_USB_PKT_SIZE);
320 if (!skb)
321 return -ENOMEM;
322 skb_reserve(skb, MAX_DWORD_ALIGN_BYTES);
323 skb_put(skb, RSI_MAX_RX_USB_PKT_SIZE - MAX_DWORD_ALIGN_BYTES);
324 dword_align_bytes = (unsigned long)skb->data & 0x3f;
325 if (dword_align_bytes > 0)
326 skb_push(skb, dword_align_bytes);
327 urb->transfer_buffer = skb->data;
328 rx_cb->rx_skb = skb;
329
330 usb_fill_bulk_urb(urb,
331 dev->usbdev,
332 usb_rcvbulkpipe(dev->usbdev,
333 dev->bulkin_endpoint_addr[ep_num - 1]),
334 urb->transfer_buffer,
335 skb->len,
336 rsi_rx_done_handler,
337 rx_cb);
338
339 status = usb_submit_urb(urb, mem_flags);
340 if (status) {
341 rsi_dbg(ERR_ZONE, "%s: Failed in urb submission\n", __func__);
342 dev_kfree_skb(skb);
343 }
344
345 return status;
346 }
347
rsi_usb_read_register_multiple(struct rsi_hw * adapter,u32 addr,u8 * data,u16 count)348 static int rsi_usb_read_register_multiple(struct rsi_hw *adapter, u32 addr,
349 u8 *data, u16 count)
350 {
351 struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
352 u8 *buf;
353 u16 transfer;
354 int status;
355
356 if (!addr)
357 return -EINVAL;
358
359 buf = kzalloc(RSI_USB_BUF_SIZE, GFP_KERNEL);
360 if (!buf)
361 return -ENOMEM;
362
363 while (count) {
364 transfer = min_t(u16, count, RSI_USB_BUF_SIZE);
365 status = usb_control_msg(dev->usbdev,
366 usb_rcvctrlpipe(dev->usbdev, 0),
367 USB_VENDOR_REGISTER_READ,
368 RSI_USB_REQ_IN,
369 ((addr & 0xffff0000) >> 16),
370 (addr & 0xffff), (void *)buf,
371 transfer, USB_CTRL_GET_TIMEOUT);
372 if (status < 0) {
373 rsi_dbg(ERR_ZONE,
374 "Reg read failed with error code :%d\n",
375 status);
376 kfree(buf);
377 return status;
378 }
379 memcpy(data, buf, transfer);
380 count -= transfer;
381 data += transfer;
382 addr += transfer;
383 }
384 kfree(buf);
385 return 0;
386 }
387
388 /**
389 * rsi_usb_write_register_multiple() - This function writes multiple bytes of
390 * information to multiple registers.
391 * @adapter: Pointer to the adapter structure.
392 * @addr: Address of the register.
393 * @data: Pointer to the data that has to be written.
394 * @count: Number of multiple bytes to be written on to the registers.
395 *
396 * Return: status: 0 on success, a negative error code on failure.
397 */
rsi_usb_write_register_multiple(struct rsi_hw * adapter,u32 addr,u8 * data,u16 count)398 static int rsi_usb_write_register_multiple(struct rsi_hw *adapter, u32 addr,
399 u8 *data, u16 count)
400 {
401 struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
402 u8 *buf;
403 u16 transfer;
404 int status = 0;
405
406 buf = kzalloc(RSI_USB_BUF_SIZE, GFP_KERNEL);
407 if (!buf)
408 return -ENOMEM;
409
410 while (count) {
411 transfer = min_t(u16, count, RSI_USB_BUF_SIZE);
412 memcpy(buf, data, transfer);
413 status = usb_control_msg(dev->usbdev,
414 usb_sndctrlpipe(dev->usbdev, 0),
415 USB_VENDOR_REGISTER_WRITE,
416 RSI_USB_REQ_OUT,
417 ((addr & 0xffff0000) >> 16),
418 (addr & 0xffff),
419 (void *)buf,
420 transfer,
421 USB_CTRL_SET_TIMEOUT);
422 if (status < 0) {
423 rsi_dbg(ERR_ZONE,
424 "Reg write failed with error code :%d\n",
425 status);
426 kfree(buf);
427 return status;
428 }
429 count -= transfer;
430 data += transfer;
431 addr += transfer;
432 }
433
434 kfree(buf);
435 return 0;
436 }
437
438 /**
439 *rsi_usb_host_intf_write_pkt() - This function writes the packet to the
440 * USB card.
441 * @adapter: Pointer to the adapter structure.
442 * @pkt: Pointer to the data to be written on to the card.
443 * @len: Length of the data to be written on to the card.
444 *
445 * Return: 0 on success, a negative error code on failure.
446 */
rsi_usb_host_intf_write_pkt(struct rsi_hw * adapter,u8 * pkt,u32 len)447 static int rsi_usb_host_intf_write_pkt(struct rsi_hw *adapter,
448 u8 *pkt,
449 u32 len)
450 {
451 u32 queueno = ((pkt[1] >> 4) & 0x7);
452 u8 endpoint;
453
454 endpoint = ((queueno == RSI_WIFI_MGMT_Q || queueno == RSI_WIFI_DATA_Q ||
455 queueno == RSI_COEX_Q) ? WLAN_EP : BT_EP);
456
457 return rsi_write_multiple(adapter,
458 endpoint,
459 (u8 *)pkt,
460 len);
461 }
462
rsi_usb_master_reg_read(struct rsi_hw * adapter,u32 reg,u32 * value,u16 len)463 static int rsi_usb_master_reg_read(struct rsi_hw *adapter, u32 reg,
464 u32 *value, u16 len)
465 {
466 struct usb_device *usbdev =
467 ((struct rsi_91x_usbdev *)adapter->rsi_dev)->usbdev;
468 u16 temp;
469 int ret;
470
471 ret = rsi_usb_reg_read(usbdev, reg, &temp, len);
472 if (ret < 0)
473 return ret;
474 *value = temp;
475
476 return 0;
477 }
478
rsi_usb_master_reg_write(struct rsi_hw * adapter,unsigned long reg,unsigned long value,u16 len)479 static int rsi_usb_master_reg_write(struct rsi_hw *adapter,
480 unsigned long reg,
481 unsigned long value, u16 len)
482 {
483 struct usb_device *usbdev =
484 ((struct rsi_91x_usbdev *)adapter->rsi_dev)->usbdev;
485
486 return rsi_usb_reg_write(usbdev, reg, value, len);
487 }
488
rsi_usb_load_data_master_write(struct rsi_hw * adapter,u32 base_address,u32 instructions_sz,u16 block_size,u8 * ta_firmware)489 static int rsi_usb_load_data_master_write(struct rsi_hw *adapter,
490 u32 base_address,
491 u32 instructions_sz, u16 block_size,
492 u8 *ta_firmware)
493 {
494 u16 num_blocks;
495 u32 cur_indx, i;
496 u8 temp_buf[256];
497 int status;
498
499 num_blocks = instructions_sz / block_size;
500 rsi_dbg(INFO_ZONE, "num_blocks: %d\n", num_blocks);
501
502 for (cur_indx = 0, i = 0; i < num_blocks; i++, cur_indx += block_size) {
503 memcpy(temp_buf, ta_firmware + cur_indx, block_size);
504 status = rsi_usb_write_register_multiple(adapter, base_address,
505 (u8 *)(temp_buf),
506 block_size);
507 if (status < 0)
508 return status;
509
510 rsi_dbg(INFO_ZONE, "%s: loading block: %d\n", __func__, i);
511 base_address += block_size;
512 }
513
514 if (instructions_sz % block_size) {
515 memset(temp_buf, 0, block_size);
516 memcpy(temp_buf, ta_firmware + cur_indx,
517 instructions_sz % block_size);
518 status = rsi_usb_write_register_multiple
519 (adapter, base_address,
520 (u8 *)temp_buf,
521 instructions_sz % block_size);
522 if (status < 0)
523 return status;
524 rsi_dbg(INFO_ZONE,
525 "Written Last Block in Address 0x%x Successfully\n",
526 cur_indx);
527 }
528 return 0;
529 }
530
531 static struct rsi_host_intf_ops usb_host_intf_ops = {
532 .write_pkt = rsi_usb_host_intf_write_pkt,
533 .read_reg_multiple = rsi_usb_read_register_multiple,
534 .write_reg_multiple = rsi_usb_write_register_multiple,
535 .master_reg_read = rsi_usb_master_reg_read,
536 .master_reg_write = rsi_usb_master_reg_write,
537 .load_data_master_write = rsi_usb_load_data_master_write,
538 };
539
540 /**
541 * rsi_deinit_usb_interface() - This function deinitializes the usb interface.
542 * @adapter: Pointer to the adapter structure.
543 *
544 * Return: None.
545 */
rsi_deinit_usb_interface(struct rsi_hw * adapter)546 static void rsi_deinit_usb_interface(struct rsi_hw *adapter)
547 {
548 struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
549
550 rsi_kill_thread(&dev->rx_thread);
551
552 usb_free_urb(dev->rx_cb[0].rx_urb);
553 if (adapter->priv->coex_mode > 1)
554 usb_free_urb(dev->rx_cb[1].rx_urb);
555
556 kfree(dev->tx_buffer);
557 }
558
rsi_usb_init_rx(struct rsi_hw * adapter)559 static int rsi_usb_init_rx(struct rsi_hw *adapter)
560 {
561 struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
562 struct rx_usb_ctrl_block *rx_cb;
563 u8 idx, num_rx_cb;
564
565 num_rx_cb = (adapter->priv->coex_mode > 1 ? 2 : 1);
566
567 for (idx = 0; idx < num_rx_cb; idx++) {
568 rx_cb = &dev->rx_cb[idx];
569
570 rx_cb->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
571 if (!rx_cb->rx_urb) {
572 rsi_dbg(ERR_ZONE, "Failed alloc rx urb[%d]\n", idx);
573 goto err;
574 }
575 rx_cb->ep_num = idx + 1;
576 rx_cb->data = (void *)dev;
577 }
578 skb_queue_head_init(&dev->rx_q);
579 rsi_init_event(&dev->rx_thread.event);
580 if (rsi_create_kthread(adapter->priv, &dev->rx_thread,
581 rsi_usb_rx_thread, "RX-Thread")) {
582 rsi_dbg(ERR_ZONE, "%s: Unable to init rx thrd\n", __func__);
583 goto err;
584 }
585
586 return 0;
587
588 err:
589 usb_free_urb(dev->rx_cb[0].rx_urb);
590 if (adapter->priv->coex_mode > 1)
591 usb_free_urb(dev->rx_cb[1].rx_urb);
592
593 return -1;
594 }
595
596 /**
597 * rsi_init_usb_interface() - This function initializes the usb interface.
598 * @adapter: Pointer to the adapter structure.
599 * @pfunction: Pointer to USB interface structure.
600 *
601 * Return: 0 on success, a negative error code on failure.
602 */
rsi_init_usb_interface(struct rsi_hw * adapter,struct usb_interface * pfunction)603 static int rsi_init_usb_interface(struct rsi_hw *adapter,
604 struct usb_interface *pfunction)
605 {
606 struct rsi_91x_usbdev *rsi_dev;
607 int status;
608
609 rsi_dev = kzalloc(sizeof(*rsi_dev), GFP_KERNEL);
610 if (!rsi_dev)
611 return -ENOMEM;
612
613 adapter->rsi_dev = rsi_dev;
614 rsi_dev->usbdev = interface_to_usbdev(pfunction);
615 rsi_dev->priv = (void *)adapter;
616
617 if (rsi_find_bulk_in_and_out_endpoints(pfunction, adapter)) {
618 status = -EINVAL;
619 goto fail_eps;
620 }
621
622 adapter->device = &pfunction->dev;
623 usb_set_intfdata(pfunction, adapter);
624
625 rsi_dev->tx_buffer = kmalloc(2048, GFP_KERNEL);
626 if (!rsi_dev->tx_buffer) {
627 status = -ENOMEM;
628 goto fail_eps;
629 }
630
631 if (rsi_usb_init_rx(adapter)) {
632 rsi_dbg(ERR_ZONE, "Failed to init RX handle\n");
633 status = -ENOMEM;
634 goto fail_rx;
635 }
636
637 rsi_dev->tx_blk_size = 252;
638 adapter->block_size = rsi_dev->tx_blk_size;
639
640 /* Initializing function callbacks */
641 adapter->check_hw_queue_status = rsi_usb_check_queue_status;
642 adapter->determine_event_timeout = rsi_usb_event_timeout;
643 adapter->rsi_host_intf = RSI_HOST_INTF_USB;
644 adapter->host_intf_ops = &usb_host_intf_ops;
645
646 #ifdef CONFIG_RSI_DEBUGFS
647 /* In USB, one less than the MAX_DEBUGFS_ENTRIES entries is required */
648 adapter->num_debugfs_entries = (MAX_DEBUGFS_ENTRIES - 1);
649 #endif
650
651 rsi_dbg(INIT_ZONE, "%s: Enabled the interface\n", __func__);
652 return 0;
653
654 fail_rx:
655 kfree(rsi_dev->tx_buffer);
656
657 fail_eps:
658
659 return status;
660 }
661
usb_ulp_read_write(struct rsi_hw * adapter,u16 addr,u32 data,u16 len_in_bits)662 static int usb_ulp_read_write(struct rsi_hw *adapter, u16 addr, u32 data,
663 u16 len_in_bits)
664 {
665 int ret;
666
667 ret = rsi_usb_master_reg_write
668 (adapter, RSI_GSPI_DATA_REG1,
669 ((addr << 6) | ((data >> 16) & 0xffff)), 2);
670 if (ret < 0)
671 return ret;
672
673 ret = rsi_usb_master_reg_write(adapter, RSI_GSPI_DATA_REG0,
674 (data & 0xffff), 2);
675 if (ret < 0)
676 return ret;
677
678 /* Initializing GSPI for ULP read/writes */
679 rsi_usb_master_reg_write(adapter, RSI_GSPI_CTRL_REG0,
680 RSI_GSPI_CTRL_REG0_VALUE, 2);
681
682 ret = rsi_usb_master_reg_write(adapter, RSI_GSPI_CTRL_REG1,
683 ((len_in_bits - 1) | RSI_GSPI_TRIG), 2);
684 if (ret < 0)
685 return ret;
686
687 msleep(20);
688
689 return 0;
690 }
691
rsi_reset_card(struct rsi_hw * adapter)692 static int rsi_reset_card(struct rsi_hw *adapter)
693 {
694 int ret;
695
696 rsi_dbg(INFO_ZONE, "Resetting Card...\n");
697 rsi_usb_master_reg_write(adapter, RSI_TA_HOLD_REG, 0xE, 4);
698
699 /* This msleep will ensure Thread-Arch processor to go to hold
700 * and any pending dma transfers to rf in device to finish.
701 */
702 msleep(100);
703
704 ret = rsi_usb_master_reg_write(adapter, SWBL_REGOUT,
705 RSI_FW_WDT_DISABLE_REQ,
706 RSI_COMMON_REG_SIZE);
707 if (ret < 0) {
708 rsi_dbg(ERR_ZONE, "Disabling firmware watchdog timer failed\n");
709 goto fail;
710 }
711
712 ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_1,
713 RSI_ULP_WRITE_2, 32);
714 if (ret < 0)
715 goto fail;
716 ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_2,
717 RSI_ULP_WRITE_0, 32);
718 if (ret < 0)
719 goto fail;
720 ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_DELAY_TIMER_1,
721 RSI_ULP_WRITE_50, 32);
722 if (ret < 0)
723 goto fail;
724 ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_DELAY_TIMER_2,
725 RSI_ULP_WRITE_0, 32);
726 if (ret < 0)
727 goto fail;
728 ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_ENABLE,
729 RSI_ULP_TIMER_ENABLE, 32);
730 if (ret < 0)
731 goto fail;
732
733 rsi_dbg(INFO_ZONE, "Reset card done\n");
734 return ret;
735
736 fail:
737 rsi_dbg(ERR_ZONE, "Reset card failed\n");
738 return ret;
739 }
740
741 /**
742 * rsi_probe() - This function is called by kernel when the driver provided
743 * Vendor and device IDs are matched. All the initialization
744 * work is done here.
745 * @pfunction: Pointer to the USB interface structure.
746 * @id: Pointer to the usb_device_id structure.
747 *
748 * Return: 0 on success, a negative error code on failure.
749 */
rsi_probe(struct usb_interface * pfunction,const struct usb_device_id * id)750 static int rsi_probe(struct usb_interface *pfunction,
751 const struct usb_device_id *id)
752 {
753 struct rsi_hw *adapter;
754 struct rsi_91x_usbdev *dev;
755 u16 fw_status;
756 int status;
757
758 rsi_dbg(INIT_ZONE, "%s: Init function called\n", __func__);
759
760 adapter = rsi_91x_init(dev_oper_mode);
761 if (!adapter) {
762 rsi_dbg(ERR_ZONE, "%s: Failed to init os intf ops\n",
763 __func__);
764 return -ENOMEM;
765 }
766 adapter->rsi_host_intf = RSI_HOST_INTF_USB;
767
768 status = rsi_init_usb_interface(adapter, pfunction);
769 if (status) {
770 rsi_dbg(ERR_ZONE, "%s: Failed to init usb interface\n",
771 __func__);
772 goto err;
773 }
774
775 rsi_dbg(ERR_ZONE, "%s: Initialized os intf ops\n", __func__);
776
777 dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
778
779 status = rsi_usb_reg_read(dev->usbdev, FW_STATUS_REG, &fw_status, 2);
780 if (status < 0)
781 goto err1;
782 else
783 fw_status &= 1;
784
785 if (!fw_status) {
786 rsi_dbg(INIT_ZONE, "Loading firmware...\n");
787 status = rsi_hal_device_init(adapter);
788 if (status) {
789 rsi_dbg(ERR_ZONE, "%s: Failed in device init\n",
790 __func__);
791 goto err1;
792 }
793 rsi_dbg(INIT_ZONE, "%s: Device Init Done\n", __func__);
794 }
795
796 status = rsi_rx_urb_submit(adapter, WLAN_EP, GFP_KERNEL);
797 if (status)
798 goto err1;
799
800 if (adapter->priv->coex_mode > 1) {
801 status = rsi_rx_urb_submit(adapter, BT_EP, GFP_KERNEL);
802 if (status)
803 goto err_kill_wlan_urb;
804 }
805
806 return 0;
807
808 err_kill_wlan_urb:
809 rsi_rx_urb_kill(adapter, WLAN_EP);
810 err1:
811 rsi_deinit_usb_interface(adapter);
812 err:
813 rsi_91x_deinit(adapter);
814 rsi_dbg(ERR_ZONE, "%s: Failed in probe...Exiting\n", __func__);
815 return status;
816 }
817
818 /**
819 * rsi_disconnect() - This function performs the reverse of the probe function,
820 * it deinitialize the driver structure.
821 * @pfunction: Pointer to the USB interface structure.
822 *
823 * Return: None.
824 */
rsi_disconnect(struct usb_interface * pfunction)825 static void rsi_disconnect(struct usb_interface *pfunction)
826 {
827 struct rsi_hw *adapter = usb_get_intfdata(pfunction);
828
829 if (!adapter)
830 return;
831
832 rsi_mac80211_detach(adapter);
833
834 if (IS_ENABLED(CONFIG_RSI_COEX) && adapter->priv->coex_mode > 1 &&
835 adapter->priv->bt_adapter) {
836 rsi_bt_ops.detach(adapter->priv->bt_adapter);
837 adapter->priv->bt_adapter = NULL;
838 }
839
840 if (adapter->priv->coex_mode > 1)
841 rsi_rx_urb_kill(adapter, BT_EP);
842 rsi_rx_urb_kill(adapter, WLAN_EP);
843
844 rsi_reset_card(adapter);
845 rsi_deinit_usb_interface(adapter);
846 rsi_91x_deinit(adapter);
847
848 rsi_dbg(INFO_ZONE, "%s: Deinitialization completed\n", __func__);
849 }
850
851 #ifdef CONFIG_PM
rsi_suspend(struct usb_interface * intf,pm_message_t message)852 static int rsi_suspend(struct usb_interface *intf, pm_message_t message)
853 {
854 /* Not yet implemented */
855 return -ENOSYS;
856 }
857
rsi_resume(struct usb_interface * intf)858 static int rsi_resume(struct usb_interface *intf)
859 {
860 /* Not yet implemented */
861 return -ENOSYS;
862 }
863 #endif
864
865 static const struct usb_device_id rsi_dev_table[] = {
866 { USB_DEVICE(RSI_USB_VID_9113, RSI_USB_PID_9113) },
867 { /* Blank */},
868 };
869
870 static struct usb_driver rsi_driver = {
871 .name = "RSI-USB WLAN",
872 .probe = rsi_probe,
873 .disconnect = rsi_disconnect,
874 .id_table = rsi_dev_table,
875 #ifdef CONFIG_PM
876 .suspend = rsi_suspend,
877 .resume = rsi_resume,
878 #endif
879 };
880
881 module_usb_driver(rsi_driver);
882
883 MODULE_AUTHOR("Redpine Signals Inc");
884 MODULE_DESCRIPTION("Common USB layer for RSI drivers");
885 MODULE_SUPPORTED_DEVICE("RSI-91x");
886 MODULE_DEVICE_TABLE(usb, rsi_dev_table);
887 MODULE_FIRMWARE(FIRMWARE_RSI9113);
888 MODULE_VERSION("0.1");
889 MODULE_LICENSE("Dual BSD/GPL");
890