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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 */
26static u16 dev_oper_mode = DEV_OPMODE_STA_BT_DUAL;
27module_param(dev_oper_mode, ushort, 0444);
28MODULE_PARM_DESC(dev_oper_mode, DEV_OPMODE_PARAM_DESC);
29
30static 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 */
41static 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 = 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 */
81static 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 = 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 */
109static int rsi_find_bulk_in_and_out_endpoints(struct usb_interface *interface,
110 struct rsi_hw *adapter)
111{
112 struct rsi_91x_usbdev *dev = 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 */
175static 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 */
220static 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 */
266static 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
297out:
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
307static void rsi_rx_urb_kill(struct rsi_hw *adapter, u8 ep_num)
308{
309 struct rsi_91x_usbdev *dev = 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 */
324static int rsi_rx_urb_submit(struct rsi_hw *adapter, u8 ep_num, gfp_t mem_flags)
325{
326 struct rsi_91x_usbdev *dev = 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
362static int rsi_usb_read_register_multiple(struct rsi_hw *adapter, u32 addr,
363 u8 *data, u16 count)
364{
365 struct rsi_91x_usbdev *dev = 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 */
412static int rsi_usb_write_register_multiple(struct rsi_hw *adapter, u32 addr,
413 u8 *data, u16 count)
414{
415 struct rsi_91x_usbdev *dev = 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 */
461static 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
477static 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
493static 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
503static 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
545static 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 */
560static void rsi_deinit_usb_interface(struct rsi_hw *adapter)
561{
562 struct rsi_91x_usbdev *dev = 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
573static int rsi_usb_init_rx(struct rsi_hw *adapter)
574{
575 struct rsi_91x_usbdev *dev = 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
602err:
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 */
617static 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
668fail_rx:
669 kfree(rsi_dev->tx_buffer);
670
671fail_eps:
672
673 return status;
674}
675
676static 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
706static 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
771fail:
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 */
785static 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 = 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
856err_kill_wlan_urb:
857 rsi_rx_urb_kill(adapter, WLAN_EP);
858err1:
859 rsi_deinit_usb_interface(adapter);
860err:
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 */
873static 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
900static int rsi_suspend(struct usb_interface *intf, pm_message_t message)
901{
902 /* Not yet implemented */
903 return -ENOSYS;
904}
905
906static int rsi_resume(struct usb_interface *intf)
907{
908 /* Not yet implemented */
909 return -ENOSYS;
910}
911#endif
912
913static 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
919static 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
930module_usb_driver(rsi_driver);
931
932MODULE_AUTHOR("Redpine Signals Inc");
933MODULE_DESCRIPTION("Common USB layer for RSI drivers");
934MODULE_DEVICE_TABLE(usb, rsi_dev_table);
935MODULE_FIRMWARE(FIRMWARE_RSI9113);
936MODULE_VERSION("0.1");
937MODULE_LICENSE("Dual BSD/GPL");
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 */
26static u16 dev_oper_mode = DEV_OPMODE_STA_BT_DUAL;
27module_param(dev_oper_mode, ushort, 0444);
28MODULE_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
33static 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 */
44static 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 * @endpoint: Type of endpoint.
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 */
84static 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 */
112static 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] && dev->bulkout_endpoint_addr[0])) {
153 dev_err(&interface->dev, "missing wlan bulk endpoints\n");
154 return -EINVAL;
155 }
156
157 if (adapter->priv->coex_mode > 1) {
158 if (!dev->bulkin_endpoint_addr[1]) {
159 dev_err(&interface->dev, "missing bt bulk-in endpoint\n");
160 return -EINVAL;
161 }
162 }
163
164 return 0;
165}
166
167#define RSI_USB_REQ_OUT (USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE)
168#define RSI_USB_REQ_IN (USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE)
169
170/* rsi_usb_reg_read() - This function reads data from given register address.
171 * @usbdev: Pointer to the usb_device structure.
172 * @reg: Address of the register to be read.
173 * @value: Value to be read.
174 * @len: length of data to be read.
175 *
176 * Return: status: 0 on success, a negative error code on failure.
177 */
178static int rsi_usb_reg_read(struct usb_device *usbdev,
179 u32 reg,
180 u16 *value,
181 u16 len)
182{
183 u8 *buf;
184 int status = -ENOMEM;
185
186 if (len > RSI_USB_CTRL_BUF_SIZE)
187 return -EINVAL;
188
189 buf = kmalloc(RSI_USB_CTRL_BUF_SIZE, GFP_KERNEL);
190 if (!buf)
191 return status;
192
193 status = usb_control_msg(usbdev,
194 usb_rcvctrlpipe(usbdev, 0),
195 USB_VENDOR_REGISTER_READ,
196 RSI_USB_REQ_IN,
197 ((reg & 0xffff0000) >> 16), (reg & 0xffff),
198 (void *)buf,
199 len,
200 USB_CTRL_GET_TIMEOUT);
201
202 *value = (buf[0] | (buf[1] << 8));
203 if (status < 0) {
204 rsi_dbg(ERR_ZONE,
205 "%s: Reg read failed with error code :%d\n",
206 __func__, status);
207 }
208 kfree(buf);
209
210 return status;
211}
212
213/**
214 * rsi_usb_reg_write() - This function writes the given data into the given
215 * register address.
216 * @usbdev: Pointer to the usb_device structure.
217 * @reg: Address of the register.
218 * @value: Value to write.
219 * @len: Length of data to be written.
220 *
221 * Return: status: 0 on success, a negative error code on failure.
222 */
223static int rsi_usb_reg_write(struct usb_device *usbdev,
224 u32 reg,
225 u32 value,
226 u16 len)
227{
228 u8 *usb_reg_buf;
229 int status = -ENOMEM;
230
231 if (len > RSI_USB_CTRL_BUF_SIZE)
232 return -EINVAL;
233
234 usb_reg_buf = kmalloc(RSI_USB_CTRL_BUF_SIZE, GFP_KERNEL);
235 if (!usb_reg_buf)
236 return status;
237
238 usb_reg_buf[0] = (cpu_to_le32(value) & 0x00ff);
239 usb_reg_buf[1] = (cpu_to_le32(value) & 0xff00) >> 8;
240 usb_reg_buf[2] = (cpu_to_le32(value) & 0x00ff0000) >> 16;
241 usb_reg_buf[3] = (cpu_to_le32(value) & 0xff000000) >> 24;
242
243 status = usb_control_msg(usbdev,
244 usb_sndctrlpipe(usbdev, 0),
245 USB_VENDOR_REGISTER_WRITE,
246 RSI_USB_REQ_OUT,
247 ((cpu_to_le32(reg) & 0xffff0000) >> 16),
248 (cpu_to_le32(reg) & 0xffff),
249 (void *)usb_reg_buf,
250 len,
251 USB_CTRL_SET_TIMEOUT);
252 if (status < 0) {
253 rsi_dbg(ERR_ZONE,
254 "%s: Reg write failed with error code :%d\n",
255 __func__, status);
256 }
257 kfree(usb_reg_buf);
258
259 return status;
260}
261
262/**
263 * rsi_rx_done_handler() - This function is called when a packet is received
264 * from USB stack. This is callback to receive done.
265 * @urb: Received URB.
266 *
267 * Return: None.
268 */
269static void rsi_rx_done_handler(struct urb *urb)
270{
271 struct rx_usb_ctrl_block *rx_cb = urb->context;
272 struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)rx_cb->data;
273 int status = -EINVAL;
274
275 if (urb->status) {
276 dev_kfree_skb(rx_cb->rx_skb);
277 return;
278 }
279
280 if (urb->actual_length <= 0 ||
281 urb->actual_length > rx_cb->rx_skb->len) {
282 rsi_dbg(INFO_ZONE, "%s: Invalid packet length = %d\n",
283 __func__, urb->actual_length);
284 goto out;
285 }
286 if (skb_queue_len(&dev->rx_q) >= RSI_MAX_RX_PKTS) {
287 rsi_dbg(INFO_ZONE, "Max RX packets reached\n");
288 goto out;
289 }
290 skb_trim(rx_cb->rx_skb, urb->actual_length);
291 skb_queue_tail(&dev->rx_q, rx_cb->rx_skb);
292
293 rsi_set_event(&dev->rx_thread.event);
294 status = 0;
295
296out:
297 if (rsi_rx_urb_submit(dev->priv, rx_cb->ep_num, GFP_ATOMIC))
298 rsi_dbg(ERR_ZONE, "%s: Failed in urb submission", __func__);
299
300 if (status)
301 dev_kfree_skb(rx_cb->rx_skb);
302}
303
304static void rsi_rx_urb_kill(struct rsi_hw *adapter, u8 ep_num)
305{
306 struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
307 struct rx_usb_ctrl_block *rx_cb = &dev->rx_cb[ep_num - 1];
308 struct urb *urb = rx_cb->rx_urb;
309
310 usb_kill_urb(urb);
311}
312
313/**
314 * rsi_rx_urb_submit() - This function submits the given URB to the USB stack.
315 * @adapter: Pointer to the adapter structure.
316 * @ep_num: Endpoint number.
317 * @mem_flags: The type of memory to allocate.
318 *
319 * Return: 0 on success, a negative error code on failure.
320 */
321static int rsi_rx_urb_submit(struct rsi_hw *adapter, u8 ep_num, gfp_t mem_flags)
322{
323 struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
324 struct rx_usb_ctrl_block *rx_cb = &dev->rx_cb[ep_num - 1];
325 struct urb *urb = rx_cb->rx_urb;
326 int status;
327 struct sk_buff *skb;
328 u8 dword_align_bytes = 0;
329
330#define RSI_MAX_RX_USB_PKT_SIZE 3000
331 skb = dev_alloc_skb(RSI_MAX_RX_USB_PKT_SIZE);
332 if (!skb)
333 return -ENOMEM;
334 skb_reserve(skb, MAX_DWORD_ALIGN_BYTES);
335 skb_put(skb, RSI_MAX_RX_USB_PKT_SIZE - MAX_DWORD_ALIGN_BYTES);
336 dword_align_bytes = (unsigned long)skb->data & 0x3f;
337 if (dword_align_bytes > 0)
338 skb_push(skb, dword_align_bytes);
339 urb->transfer_buffer = skb->data;
340 rx_cb->rx_skb = skb;
341
342 usb_fill_bulk_urb(urb,
343 dev->usbdev,
344 usb_rcvbulkpipe(dev->usbdev,
345 dev->bulkin_endpoint_addr[ep_num - 1]),
346 urb->transfer_buffer,
347 skb->len,
348 rsi_rx_done_handler,
349 rx_cb);
350
351 status = usb_submit_urb(urb, mem_flags);
352 if (status) {
353 rsi_dbg(ERR_ZONE, "%s: Failed in urb submission\n", __func__);
354 dev_kfree_skb(skb);
355 }
356
357 return status;
358}
359
360static int rsi_usb_read_register_multiple(struct rsi_hw *adapter, u32 addr,
361 u8 *data, u16 count)
362{
363 struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
364 u8 *buf;
365 u16 transfer;
366 int status;
367
368 if (!addr)
369 return -EINVAL;
370
371 buf = kzalloc(RSI_USB_BUF_SIZE, GFP_KERNEL);
372 if (!buf)
373 return -ENOMEM;
374
375 while (count) {
376 transfer = min_t(u16, count, RSI_USB_BUF_SIZE);
377 status = usb_control_msg(dev->usbdev,
378 usb_rcvctrlpipe(dev->usbdev, 0),
379 USB_VENDOR_REGISTER_READ,
380 RSI_USB_REQ_IN,
381 ((addr & 0xffff0000) >> 16),
382 (addr & 0xffff), (void *)buf,
383 transfer, USB_CTRL_GET_TIMEOUT);
384 if (status < 0) {
385 rsi_dbg(ERR_ZONE,
386 "Reg read failed with error code :%d\n",
387 status);
388 kfree(buf);
389 return status;
390 }
391 memcpy(data, buf, transfer);
392 count -= transfer;
393 data += transfer;
394 addr += transfer;
395 }
396 kfree(buf);
397 return 0;
398}
399
400/**
401 * rsi_usb_write_register_multiple() - This function writes multiple bytes of
402 * information to multiple registers.
403 * @adapter: Pointer to the adapter structure.
404 * @addr: Address of the register.
405 * @data: Pointer to the data that has to be written.
406 * @count: Number of multiple bytes to be written on to the registers.
407 *
408 * Return: status: 0 on success, a negative error code on failure.
409 */
410static int rsi_usb_write_register_multiple(struct rsi_hw *adapter, u32 addr,
411 u8 *data, u16 count)
412{
413 struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
414 u8 *buf;
415 u16 transfer;
416 int status = 0;
417
418 buf = kzalloc(RSI_USB_BUF_SIZE, GFP_KERNEL);
419 if (!buf)
420 return -ENOMEM;
421
422 while (count) {
423 transfer = min_t(u16, count, RSI_USB_BUF_SIZE);
424 memcpy(buf, data, transfer);
425 status = usb_control_msg(dev->usbdev,
426 usb_sndctrlpipe(dev->usbdev, 0),
427 USB_VENDOR_REGISTER_WRITE,
428 RSI_USB_REQ_OUT,
429 ((addr & 0xffff0000) >> 16),
430 (addr & 0xffff),
431 (void *)buf,
432 transfer,
433 USB_CTRL_SET_TIMEOUT);
434 if (status < 0) {
435 rsi_dbg(ERR_ZONE,
436 "Reg write failed with error code :%d\n",
437 status);
438 kfree(buf);
439 return status;
440 }
441 count -= transfer;
442 data += transfer;
443 addr += transfer;
444 }
445
446 kfree(buf);
447 return 0;
448}
449
450/**
451 *rsi_usb_host_intf_write_pkt() - This function writes the packet to the
452 * USB card.
453 * @adapter: Pointer to the adapter structure.
454 * @pkt: Pointer to the data to be written on to the card.
455 * @len: Length of the data to be written on to the card.
456 *
457 * Return: 0 on success, a negative error code on failure.
458 */
459static int rsi_usb_host_intf_write_pkt(struct rsi_hw *adapter,
460 u8 *pkt,
461 u32 len)
462{
463 u32 queueno = ((pkt[1] >> 4) & 0x7);
464 u8 endpoint;
465
466 endpoint = ((queueno == RSI_WIFI_MGMT_Q || queueno == RSI_WIFI_DATA_Q ||
467 queueno == RSI_COEX_Q) ? WLAN_EP : BT_EP);
468
469 return rsi_write_multiple(adapter,
470 endpoint,
471 (u8 *)pkt,
472 len);
473}
474
475static int rsi_usb_master_reg_read(struct rsi_hw *adapter, u32 reg,
476 u32 *value, u16 len)
477{
478 struct usb_device *usbdev =
479 ((struct rsi_91x_usbdev *)adapter->rsi_dev)->usbdev;
480 u16 temp;
481 int ret;
482
483 ret = rsi_usb_reg_read(usbdev, reg, &temp, len);
484 if (ret < 0)
485 return ret;
486 *value = temp;
487
488 return 0;
489}
490
491static int rsi_usb_master_reg_write(struct rsi_hw *adapter,
492 unsigned long reg,
493 unsigned long value, u16 len)
494{
495 struct usb_device *usbdev =
496 ((struct rsi_91x_usbdev *)adapter->rsi_dev)->usbdev;
497
498 return rsi_usb_reg_write(usbdev, reg, value, len);
499}
500
501static int rsi_usb_load_data_master_write(struct rsi_hw *adapter,
502 u32 base_address,
503 u32 instructions_sz, u16 block_size,
504 u8 *ta_firmware)
505{
506 u16 num_blocks;
507 u32 cur_indx, i;
508 u8 temp_buf[256];
509 int status;
510
511 num_blocks = instructions_sz / block_size;
512 rsi_dbg(INFO_ZONE, "num_blocks: %d\n", num_blocks);
513
514 for (cur_indx = 0, i = 0; i < num_blocks; i++, cur_indx += block_size) {
515 memcpy(temp_buf, ta_firmware + cur_indx, block_size);
516 status = rsi_usb_write_register_multiple(adapter, base_address,
517 (u8 *)(temp_buf),
518 block_size);
519 if (status < 0)
520 return status;
521
522 rsi_dbg(INFO_ZONE, "%s: loading block: %d\n", __func__, i);
523 base_address += block_size;
524 }
525
526 if (instructions_sz % block_size) {
527 memset(temp_buf, 0, block_size);
528 memcpy(temp_buf, ta_firmware + cur_indx,
529 instructions_sz % block_size);
530 status = rsi_usb_write_register_multiple
531 (adapter, base_address,
532 (u8 *)temp_buf,
533 instructions_sz % block_size);
534 if (status < 0)
535 return status;
536 rsi_dbg(INFO_ZONE,
537 "Written Last Block in Address 0x%x Successfully\n",
538 cur_indx);
539 }
540 return 0;
541}
542
543static struct rsi_host_intf_ops usb_host_intf_ops = {
544 .write_pkt = rsi_usb_host_intf_write_pkt,
545 .read_reg_multiple = rsi_usb_read_register_multiple,
546 .write_reg_multiple = rsi_usb_write_register_multiple,
547 .master_reg_read = rsi_usb_master_reg_read,
548 .master_reg_write = rsi_usb_master_reg_write,
549 .load_data_master_write = rsi_usb_load_data_master_write,
550};
551
552/**
553 * rsi_deinit_usb_interface() - This function deinitializes the usb interface.
554 * @adapter: Pointer to the adapter structure.
555 *
556 * Return: None.
557 */
558static void rsi_deinit_usb_interface(struct rsi_hw *adapter)
559{
560 struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
561
562 rsi_kill_thread(&dev->rx_thread);
563
564 usb_free_urb(dev->rx_cb[0].rx_urb);
565 if (adapter->priv->coex_mode > 1)
566 usb_free_urb(dev->rx_cb[1].rx_urb);
567
568 kfree(dev->tx_buffer);
569}
570
571static int rsi_usb_init_rx(struct rsi_hw *adapter)
572{
573 struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
574 struct rx_usb_ctrl_block *rx_cb;
575 u8 idx, num_rx_cb;
576
577 num_rx_cb = (adapter->priv->coex_mode > 1 ? 2 : 1);
578
579 for (idx = 0; idx < num_rx_cb; idx++) {
580 rx_cb = &dev->rx_cb[idx];
581
582 rx_cb->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
583 if (!rx_cb->rx_urb) {
584 rsi_dbg(ERR_ZONE, "Failed alloc rx urb[%d]\n", idx);
585 goto err;
586 }
587 rx_cb->ep_num = idx + 1;
588 rx_cb->data = (void *)dev;
589 }
590 skb_queue_head_init(&dev->rx_q);
591 rsi_init_event(&dev->rx_thread.event);
592 if (rsi_create_kthread(adapter->priv, &dev->rx_thread,
593 rsi_usb_rx_thread, "RX-Thread")) {
594 rsi_dbg(ERR_ZONE, "%s: Unable to init rx thrd\n", __func__);
595 goto err;
596 }
597
598 return 0;
599
600err:
601 usb_free_urb(dev->rx_cb[0].rx_urb);
602 if (adapter->priv->coex_mode > 1)
603 usb_free_urb(dev->rx_cb[1].rx_urb);
604
605 return -1;
606}
607
608/**
609 * rsi_init_usb_interface() - This function initializes the usb interface.
610 * @adapter: Pointer to the adapter structure.
611 * @pfunction: Pointer to USB interface structure.
612 *
613 * Return: 0 on success, a negative error code on failure.
614 */
615static int rsi_init_usb_interface(struct rsi_hw *adapter,
616 struct usb_interface *pfunction)
617{
618 struct rsi_91x_usbdev *rsi_dev;
619 int status;
620
621 rsi_dev = kzalloc(sizeof(*rsi_dev), GFP_KERNEL);
622 if (!rsi_dev)
623 return -ENOMEM;
624
625 adapter->rsi_dev = rsi_dev;
626 rsi_dev->usbdev = interface_to_usbdev(pfunction);
627 rsi_dev->priv = (void *)adapter;
628
629 if (rsi_find_bulk_in_and_out_endpoints(pfunction, adapter)) {
630 status = -EINVAL;
631 goto fail_eps;
632 }
633
634 adapter->device = &pfunction->dev;
635 usb_set_intfdata(pfunction, adapter);
636
637 rsi_dev->tx_buffer = kmalloc(2048, GFP_KERNEL);
638 if (!rsi_dev->tx_buffer) {
639 status = -ENOMEM;
640 goto fail_eps;
641 }
642
643 if (rsi_usb_init_rx(adapter)) {
644 rsi_dbg(ERR_ZONE, "Failed to init RX handle\n");
645 status = -ENOMEM;
646 goto fail_rx;
647 }
648
649 rsi_dev->tx_blk_size = 252;
650 adapter->block_size = rsi_dev->tx_blk_size;
651
652 /* Initializing function callbacks */
653 adapter->check_hw_queue_status = rsi_usb_check_queue_status;
654 adapter->determine_event_timeout = rsi_usb_event_timeout;
655 adapter->rsi_host_intf = RSI_HOST_INTF_USB;
656 adapter->host_intf_ops = &usb_host_intf_ops;
657
658#ifdef CONFIG_RSI_DEBUGFS
659 /* In USB, one less than the MAX_DEBUGFS_ENTRIES entries is required */
660 adapter->num_debugfs_entries = (MAX_DEBUGFS_ENTRIES - 1);
661#endif
662
663 rsi_dbg(INIT_ZONE, "%s: Enabled the interface\n", __func__);
664 return 0;
665
666fail_rx:
667 kfree(rsi_dev->tx_buffer);
668
669fail_eps:
670
671 return status;
672}
673
674static int usb_ulp_read_write(struct rsi_hw *adapter, u16 addr, u32 data,
675 u16 len_in_bits)
676{
677 int ret;
678
679 ret = rsi_usb_master_reg_write
680 (adapter, RSI_GSPI_DATA_REG1,
681 ((addr << 6) | ((data >> 16) & 0xffff)), 2);
682 if (ret < 0)
683 return ret;
684
685 ret = rsi_usb_master_reg_write(adapter, RSI_GSPI_DATA_REG0,
686 (data & 0xffff), 2);
687 if (ret < 0)
688 return ret;
689
690 /* Initializing GSPI for ULP read/writes */
691 rsi_usb_master_reg_write(adapter, RSI_GSPI_CTRL_REG0,
692 RSI_GSPI_CTRL_REG0_VALUE, 2);
693
694 ret = rsi_usb_master_reg_write(adapter, RSI_GSPI_CTRL_REG1,
695 ((len_in_bits - 1) | RSI_GSPI_TRIG), 2);
696 if (ret < 0)
697 return ret;
698
699 msleep(20);
700
701 return 0;
702}
703
704static int rsi_reset_card(struct rsi_hw *adapter)
705{
706 int ret;
707
708 rsi_dbg(INFO_ZONE, "Resetting Card...\n");
709 rsi_usb_master_reg_write(adapter, RSI_TA_HOLD_REG, 0xE, 4);
710
711 /* This msleep will ensure Thread-Arch processor to go to hold
712 * and any pending dma transfers to rf in device to finish.
713 */
714 msleep(100);
715
716 ret = rsi_usb_master_reg_write(adapter, SWBL_REGOUT,
717 RSI_FW_WDT_DISABLE_REQ,
718 RSI_COMMON_REG_SIZE);
719 if (ret < 0) {
720 rsi_dbg(ERR_ZONE, "Disabling firmware watchdog timer failed\n");
721 goto fail;
722 }
723
724 if (adapter->device_model != RSI_DEV_9116) {
725 ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_1,
726 RSI_ULP_WRITE_2, 32);
727 if (ret < 0)
728 goto fail;
729 ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_2,
730 RSI_ULP_WRITE_0, 32);
731 if (ret < 0)
732 goto fail;
733 ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_DELAY_TIMER_1,
734 RSI_ULP_WRITE_50, 32);
735 if (ret < 0)
736 goto fail;
737 ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_DELAY_TIMER_2,
738 RSI_ULP_WRITE_0, 32);
739 if (ret < 0)
740 goto fail;
741 ret = usb_ulp_read_write(adapter, RSI_WATCH_DOG_TIMER_ENABLE,
742 RSI_ULP_TIMER_ENABLE, 32);
743 if (ret < 0)
744 goto fail;
745 } else {
746 ret = rsi_usb_master_reg_write(adapter,
747 NWP_WWD_INTERRUPT_TIMER,
748 NWP_WWD_INT_TIMER_CLKS,
749 RSI_9116_REG_SIZE);
750 if (ret < 0)
751 goto fail;
752 ret = rsi_usb_master_reg_write(adapter,
753 NWP_WWD_SYSTEM_RESET_TIMER,
754 NWP_WWD_SYS_RESET_TIMER_CLKS,
755 RSI_9116_REG_SIZE);
756 if (ret < 0)
757 goto fail;
758 ret = rsi_usb_master_reg_write(adapter,
759 NWP_WWD_MODE_AND_RSTART,
760 NWP_WWD_TIMER_DISABLE,
761 RSI_9116_REG_SIZE);
762 if (ret < 0)
763 goto fail;
764 }
765
766 rsi_dbg(INFO_ZONE, "Reset card done\n");
767 return ret;
768
769fail:
770 rsi_dbg(ERR_ZONE, "Reset card failed\n");
771 return ret;
772}
773
774/**
775 * rsi_probe() - This function is called by kernel when the driver provided
776 * Vendor and device IDs are matched. All the initialization
777 * work is done here.
778 * @pfunction: Pointer to the USB interface structure.
779 * @id: Pointer to the usb_device_id structure.
780 *
781 * Return: 0 on success, a negative error code on failure.
782 */
783static int rsi_probe(struct usb_interface *pfunction,
784 const struct usb_device_id *id)
785{
786 struct rsi_hw *adapter;
787 struct rsi_91x_usbdev *dev;
788 u16 fw_status;
789 int status;
790
791 rsi_dbg(INIT_ZONE, "%s: Init function called\n", __func__);
792
793 adapter = rsi_91x_init(dev_oper_mode);
794 if (!adapter) {
795 rsi_dbg(ERR_ZONE, "%s: Failed to init os intf ops\n",
796 __func__);
797 return -ENOMEM;
798 }
799 adapter->rsi_host_intf = RSI_HOST_INTF_USB;
800
801 status = rsi_init_usb_interface(adapter, pfunction);
802 if (status) {
803 rsi_dbg(ERR_ZONE, "%s: Failed to init usb interface\n",
804 __func__);
805 goto err;
806 }
807
808 rsi_dbg(ERR_ZONE, "%s: Initialized os intf ops\n", __func__);
809
810 if (id->idProduct == RSI_USB_PID_9113) {
811 rsi_dbg(INIT_ZONE, "%s: 9113 module detected\n", __func__);
812 adapter->device_model = RSI_DEV_9113;
813 } else if (id->idProduct == RSI_USB_PID_9116) {
814 rsi_dbg(INIT_ZONE, "%s: 9116 module detected\n", __func__);
815 adapter->device_model = RSI_DEV_9116;
816 } else {
817 rsi_dbg(ERR_ZONE, "%s: Unsupported RSI device id 0x%x\n",
818 __func__, id->idProduct);
819 status = -ENODEV;
820 goto err1;
821 }
822
823 dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
824
825 status = rsi_usb_reg_read(dev->usbdev, FW_STATUS_REG, &fw_status, 2);
826 if (status < 0)
827 goto err1;
828 else
829 fw_status &= 1;
830
831 if (!fw_status) {
832 rsi_dbg(INIT_ZONE, "Loading firmware...\n");
833 status = rsi_hal_device_init(adapter);
834 if (status) {
835 rsi_dbg(ERR_ZONE, "%s: Failed in device init\n",
836 __func__);
837 goto err1;
838 }
839 rsi_dbg(INIT_ZONE, "%s: Device Init Done\n", __func__);
840 }
841
842 status = rsi_rx_urb_submit(adapter, WLAN_EP, GFP_KERNEL);
843 if (status)
844 goto err1;
845
846 if (adapter->priv->coex_mode > 1) {
847 status = rsi_rx_urb_submit(adapter, BT_EP, GFP_KERNEL);
848 if (status)
849 goto err_kill_wlan_urb;
850 }
851
852 return 0;
853
854err_kill_wlan_urb:
855 rsi_rx_urb_kill(adapter, WLAN_EP);
856err1:
857 rsi_deinit_usb_interface(adapter);
858err:
859 rsi_91x_deinit(adapter);
860 rsi_dbg(ERR_ZONE, "%s: Failed in probe...Exiting\n", __func__);
861 return status;
862}
863
864/**
865 * rsi_disconnect() - This function performs the reverse of the probe function,
866 * it deinitialize the driver structure.
867 * @pfunction: Pointer to the USB interface structure.
868 *
869 * Return: None.
870 */
871static void rsi_disconnect(struct usb_interface *pfunction)
872{
873 struct rsi_hw *adapter = usb_get_intfdata(pfunction);
874
875 if (!adapter)
876 return;
877
878 rsi_mac80211_detach(adapter);
879
880 if (IS_ENABLED(CONFIG_RSI_COEX) && adapter->priv->coex_mode > 1 &&
881 adapter->priv->bt_adapter) {
882 rsi_bt_ops.detach(adapter->priv->bt_adapter);
883 adapter->priv->bt_adapter = NULL;
884 }
885
886 if (adapter->priv->coex_mode > 1)
887 rsi_rx_urb_kill(adapter, BT_EP);
888 rsi_rx_urb_kill(adapter, WLAN_EP);
889
890 rsi_reset_card(adapter);
891 rsi_deinit_usb_interface(adapter);
892 rsi_91x_deinit(adapter);
893
894 rsi_dbg(INFO_ZONE, "%s: Deinitialization completed\n", __func__);
895}
896
897#ifdef CONFIG_PM
898static int rsi_suspend(struct usb_interface *intf, pm_message_t message)
899{
900 /* Not yet implemented */
901 return -ENOSYS;
902}
903
904static int rsi_resume(struct usb_interface *intf)
905{
906 /* Not yet implemented */
907 return -ENOSYS;
908}
909#endif
910
911static const struct usb_device_id rsi_dev_table[] = {
912 { USB_DEVICE(RSI_USB_VENDOR_ID, RSI_USB_PID_9113) },
913 { USB_DEVICE(RSI_USB_VENDOR_ID, RSI_USB_PID_9116) },
914 { /* Blank */},
915};
916
917static struct usb_driver rsi_driver = {
918 .name = "RSI-USB WLAN",
919 .probe = rsi_probe,
920 .disconnect = rsi_disconnect,
921 .id_table = rsi_dev_table,
922#ifdef CONFIG_PM
923 .suspend = rsi_suspend,
924 .resume = rsi_resume,
925#endif
926};
927
928module_usb_driver(rsi_driver);
929
930MODULE_AUTHOR("Redpine Signals Inc");
931MODULE_DESCRIPTION("Common USB layer for RSI drivers");
932MODULE_DEVICE_TABLE(usb, rsi_dev_table);
933MODULE_FIRMWARE(FIRMWARE_RSI9113);
934MODULE_VERSION("0.1");
935MODULE_LICENSE("Dual BSD/GPL");