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91eef3e2 PM |
1 | /* |
2 | * This file is part of Nokia H4P bluetooth driver | |
3 | * | |
4 | * Copyright (C) 2005-2008 Nokia Corporation. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * version 2 as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
18 | * 02110-1301 USA | |
19 | * | |
20 | * Thanks to all the Nokia people that helped with this driver, | |
21 | * including Ville Tervo and Roger Quadros. | |
22 | * | |
23 | * Power saving functionality was removed from this driver to make | |
24 | * merging easier. | |
25 | */ | |
26 | ||
27 | #include <linux/module.h> | |
28 | #include <linux/kernel.h> | |
29 | #include <linux/init.h> | |
30 | #include <linux/errno.h> | |
31 | #include <linux/delay.h> | |
32 | #include <linux/spinlock.h> | |
33 | #include <linux/serial_reg.h> | |
34 | #include <linux/skbuff.h> | |
35 | #include <linux/device.h> | |
36 | #include <linux/platform_device.h> | |
37 | #include <linux/clk.h> | |
38 | #include <linux/interrupt.h> | |
39 | #include <linux/gpio.h> | |
40 | #include <linux/timer.h> | |
41 | #include <linux/kthread.h> | |
42 | #include <linux/io.h> | |
43 | #include <linux/completion.h> | |
44 | #include <linux/sizes.h> | |
45 | ||
46 | #include <net/bluetooth/bluetooth.h> | |
47 | #include <net/bluetooth/hci_core.h> | |
48 | #include <net/bluetooth/hci.h> | |
49 | ||
50 | #include <linux/platform_data/bt-nokia-h4p.h> | |
51 | ||
52 | #include "hci_h4p.h" | |
53 | ||
54 | /* This should be used in function that cannot release clocks */ | |
55 | static void hci_h4p_set_clk(struct hci_h4p_info *info, int *clock, int enable) | |
56 | { | |
57 | unsigned long flags; | |
58 | ||
59 | spin_lock_irqsave(&info->clocks_lock, flags); | |
60 | if (enable && !*clock) { | |
61 | BT_DBG("Enabling %p", clock); | |
62 | clk_prepare_enable(info->uart_fclk); | |
63 | clk_prepare_enable(info->uart_iclk); | |
64 | if (atomic_read(&info->clk_users) == 0) | |
65 | hci_h4p_restore_regs(info); | |
66 | atomic_inc(&info->clk_users); | |
67 | } | |
68 | ||
69 | if (!enable && *clock) { | |
70 | BT_DBG("Disabling %p", clock); | |
71 | if (atomic_dec_and_test(&info->clk_users)) | |
72 | hci_h4p_store_regs(info); | |
73 | clk_disable_unprepare(info->uart_fclk); | |
74 | clk_disable_unprepare(info->uart_iclk); | |
75 | } | |
76 | ||
77 | *clock = enable; | |
78 | spin_unlock_irqrestore(&info->clocks_lock, flags); | |
79 | } | |
80 | ||
81 | static void hci_h4p_lazy_clock_release(unsigned long data) | |
82 | { | |
83 | struct hci_h4p_info *info = (struct hci_h4p_info *)data; | |
84 | unsigned long flags; | |
85 | ||
86 | spin_lock_irqsave(&info->lock, flags); | |
87 | if (!info->tx_enabled) | |
88 | hci_h4p_set_clk(info, &info->tx_clocks_en, 0); | |
89 | spin_unlock_irqrestore(&info->lock, flags); | |
90 | } | |
91 | ||
92 | /* Power management functions */ | |
93 | void hci_h4p_smart_idle(struct hci_h4p_info *info, bool enable) | |
94 | { | |
95 | u8 v; | |
96 | ||
97 | v = hci_h4p_inb(info, UART_OMAP_SYSC); | |
98 | v &= ~(UART_OMAP_SYSC_IDLEMASK); | |
99 | ||
100 | if (enable) | |
101 | v |= UART_OMAP_SYSC_SMART_IDLE; | |
102 | else | |
103 | v |= UART_OMAP_SYSC_NO_IDLE; | |
104 | ||
105 | hci_h4p_outb(info, UART_OMAP_SYSC, v); | |
106 | } | |
107 | ||
108 | static inline void h4p_schedule_pm(struct hci_h4p_info *info) | |
109 | { | |
110 | } | |
111 | ||
112 | static void hci_h4p_disable_tx(struct hci_h4p_info *info) | |
113 | { | |
114 | if (!info->pm_enabled) | |
115 | return; | |
116 | ||
117 | /* Re-enable smart-idle */ | |
118 | hci_h4p_smart_idle(info, 1); | |
119 | ||
120 | gpio_set_value(info->bt_wakeup_gpio, 0); | |
121 | mod_timer(&info->lazy_release, jiffies + msecs_to_jiffies(100)); | |
122 | info->tx_enabled = 0; | |
123 | } | |
124 | ||
125 | void hci_h4p_enable_tx(struct hci_h4p_info *info) | |
126 | { | |
127 | unsigned long flags; | |
128 | ||
129 | if (!info->pm_enabled) | |
130 | return; | |
131 | ||
132 | h4p_schedule_pm(info); | |
133 | ||
134 | spin_lock_irqsave(&info->lock, flags); | |
135 | del_timer(&info->lazy_release); | |
136 | hci_h4p_set_clk(info, &info->tx_clocks_en, 1); | |
137 | info->tx_enabled = 1; | |
138 | gpio_set_value(info->bt_wakeup_gpio, 1); | |
139 | hci_h4p_outb(info, UART_IER, hci_h4p_inb(info, UART_IER) | | |
140 | UART_IER_THRI); | |
141 | /* | |
142 | * Disable smart-idle as UART TX interrupts | |
143 | * are not wake-up capable | |
144 | */ | |
145 | hci_h4p_smart_idle(info, 0); | |
146 | ||
147 | spin_unlock_irqrestore(&info->lock, flags); | |
148 | } | |
149 | ||
150 | static void hci_h4p_disable_rx(struct hci_h4p_info *info) | |
151 | { | |
152 | if (!info->pm_enabled) | |
153 | return; | |
154 | ||
155 | info->rx_enabled = 0; | |
156 | ||
157 | if (hci_h4p_inb(info, UART_LSR) & UART_LSR_DR) | |
158 | return; | |
159 | ||
160 | if (!(hci_h4p_inb(info, UART_LSR) & UART_LSR_TEMT)) | |
161 | return; | |
162 | ||
163 | __hci_h4p_set_auto_ctsrts(info, 0, UART_EFR_RTS); | |
164 | info->autorts = 0; | |
165 | hci_h4p_set_clk(info, &info->rx_clocks_en, 0); | |
166 | } | |
167 | ||
168 | static void hci_h4p_enable_rx(struct hci_h4p_info *info) | |
169 | { | |
170 | if (!info->pm_enabled) | |
171 | return; | |
172 | ||
173 | h4p_schedule_pm(info); | |
174 | ||
175 | hci_h4p_set_clk(info, &info->rx_clocks_en, 1); | |
176 | info->rx_enabled = 1; | |
177 | ||
178 | if (!(hci_h4p_inb(info, UART_LSR) & UART_LSR_TEMT)) | |
179 | return; | |
180 | ||
181 | __hci_h4p_set_auto_ctsrts(info, 1, UART_EFR_RTS); | |
182 | info->autorts = 1; | |
183 | } | |
184 | ||
185 | /* Negotiation functions */ | |
186 | int hci_h4p_send_alive_packet(struct hci_h4p_info *info) | |
187 | { | |
188 | struct hci_h4p_alive_hdr *hdr; | |
189 | struct hci_h4p_alive_pkt *pkt; | |
190 | struct sk_buff *skb; | |
191 | unsigned long flags; | |
192 | int len; | |
193 | ||
194 | BT_DBG("Sending alive packet"); | |
195 | ||
196 | len = H4_TYPE_SIZE + sizeof(*hdr) + sizeof(*pkt); | |
197 | skb = bt_skb_alloc(len, GFP_KERNEL); | |
198 | if (!skb) | |
199 | return -ENOMEM; | |
200 | ||
201 | memset(skb->data, 0x00, len); | |
202 | *skb_put(skb, 1) = H4_ALIVE_PKT; | |
203 | hdr = (struct hci_h4p_alive_hdr *)skb_put(skb, sizeof(*hdr)); | |
204 | hdr->dlen = sizeof(*pkt); | |
205 | pkt = (struct hci_h4p_alive_pkt *)skb_put(skb, sizeof(*pkt)); | |
206 | pkt->mid = H4P_ALIVE_REQ; | |
207 | ||
208 | skb_queue_tail(&info->txq, skb); | |
209 | spin_lock_irqsave(&info->lock, flags); | |
210 | hci_h4p_outb(info, UART_IER, hci_h4p_inb(info, UART_IER) | | |
211 | UART_IER_THRI); | |
212 | spin_unlock_irqrestore(&info->lock, flags); | |
213 | ||
214 | BT_DBG("Alive packet sent"); | |
215 | ||
216 | return 0; | |
217 | } | |
218 | ||
219 | static void hci_h4p_alive_packet(struct hci_h4p_info *info, | |
220 | struct sk_buff *skb) | |
221 | { | |
222 | struct hci_h4p_alive_hdr *hdr; | |
223 | struct hci_h4p_alive_pkt *pkt; | |
224 | ||
225 | BT_DBG("Received alive packet"); | |
226 | hdr = (struct hci_h4p_alive_hdr *)skb->data; | |
227 | if (hdr->dlen != sizeof(*pkt)) { | |
228 | dev_err(info->dev, "Corrupted alive message\n"); | |
229 | info->init_error = -EIO; | |
230 | goto finish_alive; | |
231 | } | |
232 | ||
233 | pkt = (struct hci_h4p_alive_pkt *)skb_pull(skb, sizeof(*hdr)); | |
234 | if (pkt->mid != H4P_ALIVE_RESP) { | |
235 | dev_err(info->dev, "Could not negotiate hci_h4p settings\n"); | |
236 | info->init_error = -EINVAL; | |
237 | } | |
238 | ||
239 | finish_alive: | |
240 | complete(&info->init_completion); | |
241 | kfree_skb(skb); | |
242 | } | |
243 | ||
244 | static int hci_h4p_send_negotiation(struct hci_h4p_info *info) | |
245 | { | |
246 | struct hci_h4p_neg_cmd *neg_cmd; | |
247 | struct hci_h4p_neg_hdr *neg_hdr; | |
248 | struct sk_buff *skb; | |
249 | unsigned long flags; | |
250 | int err, len; | |
251 | u16 sysclk; | |
252 | ||
253 | BT_DBG("Sending negotiation.."); | |
254 | ||
255 | switch (info->bt_sysclk) { | |
256 | case 1: | |
257 | sysclk = 12000; | |
258 | break; | |
259 | case 2: | |
260 | sysclk = 38400; | |
261 | break; | |
262 | default: | |
263 | return -EINVAL; | |
264 | } | |
265 | ||
266 | len = sizeof(*neg_cmd) + sizeof(*neg_hdr) + H4_TYPE_SIZE; | |
267 | skb = bt_skb_alloc(len, GFP_KERNEL); | |
268 | if (!skb) | |
269 | return -ENOMEM; | |
270 | ||
271 | memset(skb->data, 0x00, len); | |
272 | *skb_put(skb, 1) = H4_NEG_PKT; | |
273 | neg_hdr = (struct hci_h4p_neg_hdr *)skb_put(skb, sizeof(*neg_hdr)); | |
274 | neg_cmd = (struct hci_h4p_neg_cmd *)skb_put(skb, sizeof(*neg_cmd)); | |
275 | ||
276 | neg_hdr->dlen = sizeof(*neg_cmd); | |
277 | neg_cmd->ack = H4P_NEG_REQ; | |
278 | neg_cmd->baud = cpu_to_le16(BT_BAUDRATE_DIVIDER/MAX_BAUD_RATE); | |
279 | neg_cmd->proto = H4P_PROTO_BYTE; | |
280 | neg_cmd->sys_clk = cpu_to_le16(sysclk); | |
281 | ||
282 | hci_h4p_change_speed(info, INIT_SPEED); | |
283 | ||
284 | hci_h4p_set_rts(info, 1); | |
285 | info->init_error = 0; | |
286 | init_completion(&info->init_completion); | |
287 | skb_queue_tail(&info->txq, skb); | |
288 | spin_lock_irqsave(&info->lock, flags); | |
289 | hci_h4p_outb(info, UART_IER, hci_h4p_inb(info, UART_IER) | | |
290 | UART_IER_THRI); | |
291 | spin_unlock_irqrestore(&info->lock, flags); | |
292 | ||
293 | if (!wait_for_completion_interruptible_timeout(&info->init_completion, | |
294 | msecs_to_jiffies(1000))) | |
295 | return -ETIMEDOUT; | |
296 | ||
297 | if (info->init_error < 0) | |
298 | return info->init_error; | |
299 | ||
300 | /* Change to operational settings */ | |
301 | hci_h4p_set_auto_ctsrts(info, 0, UART_EFR_RTS); | |
302 | hci_h4p_set_rts(info, 0); | |
303 | hci_h4p_change_speed(info, MAX_BAUD_RATE); | |
304 | ||
305 | err = hci_h4p_wait_for_cts(info, 1, 100); | |
306 | if (err < 0) | |
307 | return err; | |
308 | ||
309 | hci_h4p_set_auto_ctsrts(info, 1, UART_EFR_RTS); | |
310 | init_completion(&info->init_completion); | |
311 | err = hci_h4p_send_alive_packet(info); | |
312 | ||
313 | if (err < 0) | |
314 | return err; | |
315 | ||
316 | if (!wait_for_completion_interruptible_timeout(&info->init_completion, | |
317 | msecs_to_jiffies(1000))) | |
318 | return -ETIMEDOUT; | |
319 | ||
320 | if (info->init_error < 0) | |
321 | return info->init_error; | |
322 | ||
323 | BT_DBG("Negotiation successful"); | |
324 | return 0; | |
325 | } | |
326 | ||
327 | static void hci_h4p_negotiation_packet(struct hci_h4p_info *info, | |
328 | struct sk_buff *skb) | |
329 | { | |
330 | struct hci_h4p_neg_hdr *hdr; | |
331 | struct hci_h4p_neg_evt *evt; | |
332 | ||
333 | hdr = (struct hci_h4p_neg_hdr *)skb->data; | |
334 | if (hdr->dlen != sizeof(*evt)) { | |
335 | info->init_error = -EIO; | |
336 | goto finish_neg; | |
337 | } | |
338 | ||
339 | evt = (struct hci_h4p_neg_evt *)skb_pull(skb, sizeof(*hdr)); | |
340 | ||
341 | if (evt->ack != H4P_NEG_ACK) { | |
342 | dev_err(info->dev, "Could not negotiate hci_h4p settings\n"); | |
343 | info->init_error = -EINVAL; | |
344 | } | |
345 | ||
346 | info->man_id = evt->man_id; | |
347 | info->ver_id = evt->ver_id; | |
348 | ||
349 | finish_neg: | |
350 | ||
351 | complete(&info->init_completion); | |
352 | kfree_skb(skb); | |
353 | } | |
354 | ||
355 | /* H4 packet handling functions */ | |
356 | static int hci_h4p_get_hdr_len(struct hci_h4p_info *info, u8 pkt_type) | |
357 | { | |
358 | long retval; | |
359 | ||
360 | switch (pkt_type) { | |
361 | case H4_EVT_PKT: | |
362 | retval = HCI_EVENT_HDR_SIZE; | |
363 | break; | |
364 | case H4_ACL_PKT: | |
365 | retval = HCI_ACL_HDR_SIZE; | |
366 | break; | |
367 | case H4_SCO_PKT: | |
368 | retval = HCI_SCO_HDR_SIZE; | |
369 | break; | |
370 | case H4_NEG_PKT: | |
371 | retval = H4P_NEG_HDR_SIZE; | |
372 | break; | |
373 | case H4_ALIVE_PKT: | |
374 | retval = H4P_ALIVE_HDR_SIZE; | |
375 | break; | |
376 | case H4_RADIO_PKT: | |
377 | retval = H4_RADIO_HDR_SIZE; | |
378 | break; | |
379 | default: | |
380 | dev_err(info->dev, "Unknown H4 packet type 0x%.2x\n", pkt_type); | |
381 | retval = -1; | |
382 | break; | |
383 | } | |
384 | ||
385 | return retval; | |
386 | } | |
387 | ||
388 | static unsigned int hci_h4p_get_data_len(struct hci_h4p_info *info, | |
389 | struct sk_buff *skb) | |
390 | { | |
391 | long retval = -1; | |
392 | struct hci_acl_hdr *acl_hdr; | |
393 | struct hci_sco_hdr *sco_hdr; | |
394 | struct hci_event_hdr *evt_hdr; | |
395 | struct hci_h4p_neg_hdr *neg_hdr; | |
396 | struct hci_h4p_alive_hdr *alive_hdr; | |
397 | struct hci_h4p_radio_hdr *radio_hdr; | |
398 | ||
399 | switch (bt_cb(skb)->pkt_type) { | |
400 | case H4_EVT_PKT: | |
401 | evt_hdr = (struct hci_event_hdr *)skb->data; | |
402 | retval = evt_hdr->plen; | |
403 | break; | |
404 | case H4_ACL_PKT: | |
405 | acl_hdr = (struct hci_acl_hdr *)skb->data; | |
406 | retval = le16_to_cpu(acl_hdr->dlen); | |
407 | break; | |
408 | case H4_SCO_PKT: | |
409 | sco_hdr = (struct hci_sco_hdr *)skb->data; | |
410 | retval = sco_hdr->dlen; | |
411 | break; | |
412 | case H4_RADIO_PKT: | |
413 | radio_hdr = (struct hci_h4p_radio_hdr *)skb->data; | |
414 | retval = radio_hdr->dlen; | |
415 | break; | |
416 | case H4_NEG_PKT: | |
417 | neg_hdr = (struct hci_h4p_neg_hdr *)skb->data; | |
418 | retval = neg_hdr->dlen; | |
419 | break; | |
420 | case H4_ALIVE_PKT: | |
421 | alive_hdr = (struct hci_h4p_alive_hdr *)skb->data; | |
422 | retval = alive_hdr->dlen; | |
423 | break; | |
424 | } | |
425 | ||
426 | return retval; | |
427 | } | |
428 | ||
429 | static inline void hci_h4p_recv_frame(struct hci_h4p_info *info, | |
430 | struct sk_buff *skb) | |
431 | { | |
432 | if (unlikely(!test_bit(HCI_RUNNING, &info->hdev->flags))) { | |
433 | switch (bt_cb(skb)->pkt_type) { | |
434 | case H4_NEG_PKT: | |
435 | hci_h4p_negotiation_packet(info, skb); | |
436 | info->rx_state = WAIT_FOR_PKT_TYPE; | |
437 | return; | |
438 | case H4_ALIVE_PKT: | |
439 | hci_h4p_alive_packet(info, skb); | |
440 | info->rx_state = WAIT_FOR_PKT_TYPE; | |
441 | return; | |
442 | } | |
443 | ||
444 | if (!test_bit(HCI_UP, &info->hdev->flags)) { | |
445 | BT_DBG("fw_event"); | |
446 | hci_h4p_parse_fw_event(info, skb); | |
447 | return; | |
448 | } | |
449 | } | |
450 | ||
451 | hci_recv_frame(info->hdev, skb); | |
452 | BT_DBG("Frame sent to upper layer"); | |
453 | } | |
454 | ||
455 | static inline void hci_h4p_handle_byte(struct hci_h4p_info *info, u8 byte) | |
456 | { | |
457 | switch (info->rx_state) { | |
458 | case WAIT_FOR_PKT_TYPE: | |
459 | bt_cb(info->rx_skb)->pkt_type = byte; | |
460 | info->rx_count = hci_h4p_get_hdr_len(info, byte); | |
461 | if (info->rx_count < 0) { | |
462 | info->hdev->stat.err_rx++; | |
463 | kfree_skb(info->rx_skb); | |
464 | info->rx_skb = NULL; | |
465 | } else { | |
466 | info->rx_state = WAIT_FOR_HEADER; | |
467 | } | |
468 | break; | |
469 | case WAIT_FOR_HEADER: | |
470 | info->rx_count--; | |
471 | *skb_put(info->rx_skb, 1) = byte; | |
472 | if (info->rx_count != 0) | |
473 | break; | |
474 | info->rx_count = hci_h4p_get_data_len(info, info->rx_skb); | |
475 | if (info->rx_count > skb_tailroom(info->rx_skb)) { | |
476 | dev_err(info->dev, "frame too long\n"); | |
477 | info->garbage_bytes = info->rx_count | |
478 | - skb_tailroom(info->rx_skb); | |
479 | kfree_skb(info->rx_skb); | |
480 | info->rx_skb = NULL; | |
481 | break; | |
482 | } | |
483 | info->rx_state = WAIT_FOR_DATA; | |
484 | break; | |
485 | case WAIT_FOR_DATA: | |
486 | info->rx_count--; | |
487 | *skb_put(info->rx_skb, 1) = byte; | |
488 | break; | |
489 | default: | |
490 | WARN_ON(1); | |
491 | break; | |
492 | } | |
493 | ||
494 | if (info->rx_count == 0) { | |
495 | /* H4+ devices should always send word aligned packets */ | |
496 | if (!(info->rx_skb->len % 2)) | |
497 | info->garbage_bytes++; | |
498 | hci_h4p_recv_frame(info, info->rx_skb); | |
499 | info->rx_skb = NULL; | |
500 | } | |
501 | } | |
502 | ||
503 | static void hci_h4p_rx_tasklet(unsigned long data) | |
504 | { | |
505 | u8 byte; | |
506 | struct hci_h4p_info *info = (struct hci_h4p_info *)data; | |
507 | ||
508 | BT_DBG("tasklet woke up"); | |
509 | BT_DBG("rx_tasklet woke up"); | |
510 | ||
511 | while (hci_h4p_inb(info, UART_LSR) & UART_LSR_DR) { | |
512 | byte = hci_h4p_inb(info, UART_RX); | |
513 | if (info->garbage_bytes) { | |
514 | info->garbage_bytes--; | |
515 | continue; | |
516 | } | |
517 | if (info->rx_skb == NULL) { | |
518 | info->rx_skb = bt_skb_alloc(HCI_MAX_FRAME_SIZE, | |
519 | GFP_ATOMIC | GFP_DMA); | |
520 | if (!info->rx_skb) { | |
521 | dev_err(info->dev, | |
522 | "No memory for new packet\n"); | |
523 | goto finish_rx; | |
524 | } | |
525 | info->rx_state = WAIT_FOR_PKT_TYPE; | |
526 | info->rx_skb->dev = (void *)info->hdev; | |
527 | } | |
528 | info->hdev->stat.byte_rx++; | |
529 | hci_h4p_handle_byte(info, byte); | |
530 | } | |
531 | ||
532 | if (!info->rx_enabled) { | |
533 | if (hci_h4p_inb(info, UART_LSR) & UART_LSR_TEMT && | |
534 | info->autorts) { | |
535 | __hci_h4p_set_auto_ctsrts(info, 0 , UART_EFR_RTS); | |
536 | info->autorts = 0; | |
537 | } | |
538 | /* Flush posted write to avoid spurious interrupts */ | |
539 | hci_h4p_inb(info, UART_OMAP_SCR); | |
540 | hci_h4p_set_clk(info, &info->rx_clocks_en, 0); | |
541 | } | |
542 | ||
543 | finish_rx: | |
544 | BT_DBG("rx_ended"); | |
545 | } | |
546 | ||
547 | static void hci_h4p_tx_tasklet(unsigned long data) | |
548 | { | |
549 | unsigned int sent = 0; | |
550 | struct sk_buff *skb; | |
551 | struct hci_h4p_info *info = (struct hci_h4p_info *)data; | |
552 | ||
553 | BT_DBG("tasklet woke up"); | |
554 | BT_DBG("tx_tasklet woke up"); | |
555 | ||
556 | if (info->autorts != info->rx_enabled) { | |
557 | if (hci_h4p_inb(info, UART_LSR) & UART_LSR_TEMT) { | |
558 | if (info->autorts && !info->rx_enabled) { | |
559 | __hci_h4p_set_auto_ctsrts(info, 0, | |
560 | UART_EFR_RTS); | |
561 | info->autorts = 0; | |
562 | } | |
563 | if (!info->autorts && info->rx_enabled) { | |
564 | __hci_h4p_set_auto_ctsrts(info, 1, | |
565 | UART_EFR_RTS); | |
566 | info->autorts = 1; | |
567 | } | |
568 | } else { | |
569 | hci_h4p_outb(info, UART_OMAP_SCR, | |
570 | hci_h4p_inb(info, UART_OMAP_SCR) | | |
571 | UART_OMAP_SCR_EMPTY_THR); | |
572 | goto finish_tx; | |
573 | } | |
574 | } | |
575 | ||
576 | skb = skb_dequeue(&info->txq); | |
577 | if (!skb) { | |
578 | /* No data in buffer */ | |
579 | BT_DBG("skb ready"); | |
580 | if (hci_h4p_inb(info, UART_LSR) & UART_LSR_TEMT) { | |
581 | hci_h4p_outb(info, UART_IER, | |
582 | hci_h4p_inb(info, UART_IER) & | |
583 | ~UART_IER_THRI); | |
584 | hci_h4p_inb(info, UART_OMAP_SCR); | |
585 | hci_h4p_disable_tx(info); | |
586 | return; | |
587 | } | |
588 | hci_h4p_outb(info, UART_OMAP_SCR, | |
589 | hci_h4p_inb(info, UART_OMAP_SCR) | | |
590 | UART_OMAP_SCR_EMPTY_THR); | |
591 | goto finish_tx; | |
592 | } | |
593 | ||
594 | /* Copy data to tx fifo */ | |
595 | while (!(hci_h4p_inb(info, UART_OMAP_SSR) & UART_OMAP_SSR_TXFULL) && | |
596 | (sent < skb->len)) { | |
597 | hci_h4p_outb(info, UART_TX, skb->data[sent]); | |
598 | sent++; | |
599 | } | |
600 | ||
601 | info->hdev->stat.byte_tx += sent; | |
602 | if (skb->len == sent) { | |
603 | kfree_skb(skb); | |
604 | } else { | |
605 | skb_pull(skb, sent); | |
606 | skb_queue_head(&info->txq, skb); | |
607 | } | |
608 | ||
609 | hci_h4p_outb(info, UART_OMAP_SCR, hci_h4p_inb(info, UART_OMAP_SCR) & | |
610 | ~UART_OMAP_SCR_EMPTY_THR); | |
611 | hci_h4p_outb(info, UART_IER, hci_h4p_inb(info, UART_IER) | | |
612 | UART_IER_THRI); | |
613 | ||
614 | finish_tx: | |
615 | /* Flush posted write to avoid spurious interrupts */ | |
616 | hci_h4p_inb(info, UART_OMAP_SCR); | |
617 | ||
618 | } | |
619 | ||
620 | static irqreturn_t hci_h4p_interrupt(int irq, void *data) | |
621 | { | |
622 | struct hci_h4p_info *info = (struct hci_h4p_info *)data; | |
623 | u8 iir, msr; | |
624 | int ret; | |
625 | ||
626 | ret = IRQ_NONE; | |
627 | ||
628 | iir = hci_h4p_inb(info, UART_IIR); | |
629 | if (iir & UART_IIR_NO_INT) | |
630 | return IRQ_HANDLED; | |
631 | ||
632 | BT_DBG("In interrupt handler iir 0x%.2x", iir); | |
633 | ||
634 | iir &= UART_IIR_ID; | |
635 | ||
636 | if (iir == UART_IIR_MSI) { | |
637 | msr = hci_h4p_inb(info, UART_MSR); | |
638 | ret = IRQ_HANDLED; | |
639 | } | |
640 | if (iir == UART_IIR_RLSI) { | |
641 | hci_h4p_inb(info, UART_RX); | |
642 | hci_h4p_inb(info, UART_LSR); | |
643 | ret = IRQ_HANDLED; | |
644 | } | |
645 | ||
646 | if (iir == UART_IIR_RDI) { | |
647 | hci_h4p_rx_tasklet((unsigned long)data); | |
648 | ret = IRQ_HANDLED; | |
649 | } | |
650 | ||
651 | if (iir == UART_IIR_THRI) { | |
652 | hci_h4p_tx_tasklet((unsigned long)data); | |
653 | ret = IRQ_HANDLED; | |
654 | } | |
655 | ||
656 | return ret; | |
657 | } | |
658 | ||
659 | static irqreturn_t hci_h4p_wakeup_interrupt(int irq, void *dev_inst) | |
660 | { | |
661 | struct hci_h4p_info *info = dev_inst; | |
662 | int should_wakeup; | |
663 | struct hci_dev *hdev; | |
664 | ||
665 | if (!info->hdev) | |
666 | return IRQ_HANDLED; | |
667 | ||
668 | should_wakeup = gpio_get_value(info->host_wakeup_gpio); | |
669 | hdev = info->hdev; | |
670 | ||
671 | if (!test_bit(HCI_RUNNING, &hdev->flags)) { | |
672 | if (should_wakeup == 1) | |
673 | complete_all(&info->test_completion); | |
674 | ||
675 | return IRQ_HANDLED; | |
676 | } | |
677 | ||
678 | BT_DBG("gpio interrupt %d", should_wakeup); | |
679 | ||
680 | /* Check if wee have missed some interrupts */ | |
681 | if (info->rx_enabled == should_wakeup) | |
682 | return IRQ_HANDLED; | |
683 | ||
684 | if (should_wakeup) | |
685 | hci_h4p_enable_rx(info); | |
686 | else | |
687 | hci_h4p_disable_rx(info); | |
688 | ||
689 | return IRQ_HANDLED; | |
690 | } | |
691 | ||
692 | static inline void hci_h4p_set_pm_limits(struct hci_h4p_info *info, bool set) | |
693 | { | |
694 | struct hci_h4p_platform_data *bt_plat_data = info->dev->platform_data; | |
695 | const char *sset = set ? "set" : "clear"; | |
696 | ||
697 | if (unlikely(!bt_plat_data || !bt_plat_data->set_pm_limits)) | |
698 | return; | |
699 | ||
700 | if (set != !!test_bit(H4P_ACTIVE_MODE, &info->pm_flags)) { | |
701 | bt_plat_data->set_pm_limits(info->dev, set); | |
702 | if (set) | |
703 | set_bit(H4P_ACTIVE_MODE, &info->pm_flags); | |
704 | else | |
705 | clear_bit(H4P_ACTIVE_MODE, &info->pm_flags); | |
706 | BT_DBG("Change pm constraints to: %s", sset); | |
707 | return; | |
708 | } | |
709 | ||
710 | BT_DBG("pm constraints remains: %s", sset); | |
711 | } | |
712 | ||
713 | static int hci_h4p_reset(struct hci_h4p_info *info) | |
714 | { | |
715 | int err; | |
716 | ||
717 | err = hci_h4p_reset_uart(info); | |
718 | if (err < 0) { | |
719 | dev_err(info->dev, "Uart reset failed\n"); | |
720 | return err; | |
721 | } | |
722 | hci_h4p_init_uart(info); | |
723 | hci_h4p_set_rts(info, 0); | |
724 | ||
725 | gpio_set_value(info->reset_gpio, 0); | |
726 | gpio_set_value(info->bt_wakeup_gpio, 1); | |
727 | msleep(10); | |
728 | ||
729 | if (gpio_get_value(info->host_wakeup_gpio) == 1) { | |
730 | dev_err(info->dev, "host_wakeup_gpio not low\n"); | |
731 | return -EPROTO; | |
732 | } | |
733 | ||
734 | init_completion(&info->test_completion); | |
735 | gpio_set_value(info->reset_gpio, 1); | |
736 | ||
737 | if (!wait_for_completion_interruptible_timeout(&info->test_completion, | |
738 | msecs_to_jiffies(100))) { | |
739 | dev_err(info->dev, "wakeup test timed out\n"); | |
740 | complete_all(&info->test_completion); | |
741 | return -EPROTO; | |
742 | } | |
743 | ||
744 | err = hci_h4p_wait_for_cts(info, 1, 100); | |
745 | if (err < 0) { | |
746 | dev_err(info->dev, "No cts from bt chip\n"); | |
747 | return err; | |
748 | } | |
749 | ||
750 | hci_h4p_set_rts(info, 1); | |
751 | ||
752 | return 0; | |
753 | } | |
754 | ||
755 | /* hci callback functions */ | |
756 | static int hci_h4p_hci_flush(struct hci_dev *hdev) | |
757 | { | |
758 | struct hci_h4p_info *info = hci_get_drvdata(hdev); | |
759 | skb_queue_purge(&info->txq); | |
760 | ||
761 | return 0; | |
762 | } | |
763 | ||
764 | static int hci_h4p_bt_wakeup_test(struct hci_h4p_info *info) | |
765 | { | |
766 | /* | |
767 | * Test Sequence: | |
768 | * Host de-asserts the BT_WAKE_UP line. | |
769 | * Host polls the UART_CTS line, waiting for it to be de-asserted. | |
770 | * Host asserts the BT_WAKE_UP line. | |
771 | * Host polls the UART_CTS line, waiting for it to be asserted. | |
772 | * Host de-asserts the BT_WAKE_UP line (allow the Bluetooth device to | |
773 | * sleep). | |
774 | * Host polls the UART_CTS line, waiting for it to be de-asserted. | |
775 | */ | |
776 | int err; | |
777 | int ret = -ECOMM; | |
778 | ||
779 | if (!info) | |
780 | return -EINVAL; | |
781 | ||
782 | /* Disable wakeup interrupts */ | |
783 | disable_irq(gpio_to_irq(info->host_wakeup_gpio)); | |
784 | ||
785 | gpio_set_value(info->bt_wakeup_gpio, 0); | |
786 | err = hci_h4p_wait_for_cts(info, 0, 100); | |
787 | if (err) { | |
4f7dcd61 GK |
788 | dev_warn(info->dev, |
789 | "bt_wakeup_test: fail: CTS low timed out: %d\n", | |
790 | err); | |
91eef3e2 PM |
791 | goto out; |
792 | } | |
793 | ||
794 | gpio_set_value(info->bt_wakeup_gpio, 1); | |
795 | err = hci_h4p_wait_for_cts(info, 1, 100); | |
796 | if (err) { | |
4f7dcd61 GK |
797 | dev_warn(info->dev, |
798 | "bt_wakeup_test: fail: CTS high timed out: %d\n", | |
799 | err); | |
91eef3e2 PM |
800 | goto out; |
801 | } | |
802 | ||
803 | gpio_set_value(info->bt_wakeup_gpio, 0); | |
804 | err = hci_h4p_wait_for_cts(info, 0, 100); | |
805 | if (err) { | |
4f7dcd61 GK |
806 | dev_warn(info->dev, |
807 | "bt_wakeup_test: fail: CTS re-low timed out: %d\n", | |
808 | err); | |
91eef3e2 PM |
809 | goto out; |
810 | } | |
811 | ||
812 | ret = 0; | |
813 | ||
814 | out: | |
815 | ||
816 | /* Re-enable wakeup interrupts */ | |
817 | enable_irq(gpio_to_irq(info->host_wakeup_gpio)); | |
818 | ||
819 | return ret; | |
820 | } | |
821 | ||
822 | static int hci_h4p_hci_open(struct hci_dev *hdev) | |
823 | { | |
824 | struct hci_h4p_info *info; | |
825 | int err, retries = 0; | |
826 | struct sk_buff_head fw_queue; | |
827 | unsigned long flags; | |
828 | ||
829 | info = hci_get_drvdata(hdev); | |
830 | ||
831 | if (test_bit(HCI_RUNNING, &hdev->flags)) | |
832 | return 0; | |
833 | ||
834 | /* TI1271 has HW bug and boot up might fail. Retry up to three times */ | |
835 | again: | |
836 | ||
837 | info->rx_enabled = 1; | |
838 | info->rx_state = WAIT_FOR_PKT_TYPE; | |
839 | info->rx_count = 0; | |
840 | info->garbage_bytes = 0; | |
841 | info->rx_skb = NULL; | |
842 | info->pm_enabled = 0; | |
843 | init_completion(&info->fw_completion); | |
844 | hci_h4p_set_clk(info, &info->tx_clocks_en, 1); | |
845 | hci_h4p_set_clk(info, &info->rx_clocks_en, 1); | |
846 | skb_queue_head_init(&fw_queue); | |
847 | ||
848 | err = hci_h4p_reset(info); | |
849 | if (err < 0) | |
850 | goto err_clean; | |
851 | ||
852 | hci_h4p_set_auto_ctsrts(info, 1, UART_EFR_CTS | UART_EFR_RTS); | |
853 | info->autorts = 1; | |
854 | ||
855 | err = hci_h4p_send_negotiation(info); | |
856 | ||
857 | err = hci_h4p_read_fw(info, &fw_queue); | |
858 | if (err < 0) { | |
859 | dev_err(info->dev, "Cannot read firmware\n"); | |
860 | goto err_clean; | |
861 | } | |
862 | ||
863 | err = hci_h4p_send_fw(info, &fw_queue); | |
864 | if (err < 0) { | |
865 | dev_err(info->dev, "Sending firmware failed.\n"); | |
866 | goto err_clean; | |
867 | } | |
868 | ||
869 | info->pm_enabled = 1; | |
870 | ||
871 | err = hci_h4p_bt_wakeup_test(info); | |
872 | if (err < 0) { | |
873 | dev_err(info->dev, "BT wakeup test failed.\n"); | |
874 | goto err_clean; | |
875 | } | |
876 | ||
877 | spin_lock_irqsave(&info->lock, flags); | |
878 | info->rx_enabled = gpio_get_value(info->host_wakeup_gpio); | |
879 | hci_h4p_set_clk(info, &info->rx_clocks_en, info->rx_enabled); | |
880 | spin_unlock_irqrestore(&info->lock, flags); | |
881 | ||
882 | hci_h4p_set_clk(info, &info->tx_clocks_en, 0); | |
883 | ||
884 | kfree_skb(info->alive_cmd_skb); | |
885 | info->alive_cmd_skb = NULL; | |
886 | set_bit(HCI_RUNNING, &hdev->flags); | |
887 | ||
888 | BT_DBG("hci up and running"); | |
889 | return 0; | |
890 | ||
891 | err_clean: | |
892 | hci_h4p_hci_flush(hdev); | |
893 | hci_h4p_reset_uart(info); | |
894 | del_timer_sync(&info->lazy_release); | |
895 | hci_h4p_set_clk(info, &info->tx_clocks_en, 0); | |
896 | hci_h4p_set_clk(info, &info->rx_clocks_en, 0); | |
897 | gpio_set_value(info->reset_gpio, 0); | |
898 | gpio_set_value(info->bt_wakeup_gpio, 0); | |
899 | skb_queue_purge(&fw_queue); | |
900 | kfree_skb(info->alive_cmd_skb); | |
901 | info->alive_cmd_skb = NULL; | |
902 | kfree_skb(info->rx_skb); | |
903 | info->rx_skb = NULL; | |
904 | ||
905 | if (retries++ < 3) { | |
906 | dev_err(info->dev, "FW loading try %d fail. Retry.\n", retries); | |
907 | goto again; | |
908 | } | |
909 | ||
910 | return err; | |
911 | } | |
912 | ||
913 | static int hci_h4p_hci_close(struct hci_dev *hdev) | |
914 | { | |
915 | struct hci_h4p_info *info = hci_get_drvdata(hdev); | |
916 | ||
917 | if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags)) | |
918 | return 0; | |
919 | ||
920 | hci_h4p_hci_flush(hdev); | |
921 | hci_h4p_set_clk(info, &info->tx_clocks_en, 1); | |
922 | hci_h4p_set_clk(info, &info->rx_clocks_en, 1); | |
923 | hci_h4p_reset_uart(info); | |
924 | del_timer_sync(&info->lazy_release); | |
925 | hci_h4p_set_clk(info, &info->tx_clocks_en, 0); | |
926 | hci_h4p_set_clk(info, &info->rx_clocks_en, 0); | |
927 | gpio_set_value(info->reset_gpio, 0); | |
928 | gpio_set_value(info->bt_wakeup_gpio, 0); | |
929 | kfree_skb(info->rx_skb); | |
930 | ||
931 | return 0; | |
932 | } | |
933 | ||
934 | static int hci_h4p_hci_send_frame(struct hci_dev *hdev, struct sk_buff *skb) | |
935 | { | |
936 | struct hci_h4p_info *info; | |
937 | int err = 0; | |
938 | ||
939 | BT_DBG("dev %p, skb %p", hdev, skb); | |
940 | ||
941 | info = hci_get_drvdata(hdev); | |
942 | ||
943 | if (!test_bit(HCI_RUNNING, &hdev->flags)) { | |
944 | dev_warn(info->dev, "Frame for non-running device\n"); | |
945 | return -EIO; | |
946 | } | |
947 | ||
948 | switch (bt_cb(skb)->pkt_type) { | |
949 | case HCI_COMMAND_PKT: | |
950 | hdev->stat.cmd_tx++; | |
951 | break; | |
952 | case HCI_ACLDATA_PKT: | |
953 | hdev->stat.acl_tx++; | |
954 | break; | |
955 | case HCI_SCODATA_PKT: | |
956 | hdev->stat.sco_tx++; | |
957 | break; | |
958 | } | |
959 | ||
960 | /* Push frame type to skb */ | |
961 | *skb_push(skb, 1) = (bt_cb(skb)->pkt_type); | |
962 | /* We should allways send word aligned data to h4+ devices */ | |
963 | if (skb->len % 2) { | |
964 | err = skb_pad(skb, 1); | |
965 | if (!err) | |
966 | *skb_put(skb, 1) = 0x00; | |
967 | } | |
968 | if (err) | |
969 | return err; | |
970 | ||
971 | skb_queue_tail(&info->txq, skb); | |
972 | hci_h4p_enable_tx(info); | |
973 | ||
974 | return 0; | |
975 | } | |
976 | ||
977 | static ssize_t hci_h4p_store_bdaddr(struct device *dev, | |
978 | struct device_attribute *attr, | |
979 | const char *buf, size_t count) | |
980 | { | |
981 | struct hci_h4p_info *info = dev_get_drvdata(dev); | |
982 | unsigned int bdaddr[6]; | |
983 | int ret, i; | |
984 | ||
985 | ret = sscanf(buf, "%2x:%2x:%2x:%2x:%2x:%2x\n", | |
986 | &bdaddr[0], &bdaddr[1], &bdaddr[2], | |
987 | &bdaddr[3], &bdaddr[4], &bdaddr[5]); | |
988 | ||
989 | if (ret != 6) | |
990 | return -EINVAL; | |
991 | ||
992 | for (i = 0; i < 6; i++) { | |
993 | if (bdaddr[i] > 0xff) | |
994 | return -EINVAL; | |
995 | info->bd_addr[i] = bdaddr[i] & 0xff; | |
996 | } | |
997 | ||
998 | return count; | |
999 | } | |
1000 | ||
1001 | static ssize_t hci_h4p_show_bdaddr(struct device *dev, | |
1002 | struct device_attribute *attr, char *buf) | |
1003 | { | |
1004 | struct hci_h4p_info *info = dev_get_drvdata(dev); | |
1005 | ||
1006 | return sprintf(buf, "%pMR\n", info->bd_addr); | |
1007 | } | |
1008 | ||
1009 | static DEVICE_ATTR(bdaddr, S_IRUGO | S_IWUSR, hci_h4p_show_bdaddr, | |
1010 | hci_h4p_store_bdaddr); | |
1011 | ||
1012 | static int hci_h4p_sysfs_create_files(struct device *dev) | |
1013 | { | |
1014 | return device_create_file(dev, &dev_attr_bdaddr); | |
1015 | } | |
1016 | ||
1017 | static void hci_h4p_sysfs_remove_files(struct device *dev) | |
1018 | { | |
1019 | device_remove_file(dev, &dev_attr_bdaddr); | |
1020 | } | |
1021 | ||
1022 | static int hci_h4p_register_hdev(struct hci_h4p_info *info) | |
1023 | { | |
1024 | struct hci_dev *hdev; | |
1025 | ||
1026 | /* Initialize and register HCI device */ | |
1027 | ||
1028 | hdev = hci_alloc_dev(); | |
1029 | if (!hdev) { | |
1030 | dev_err(info->dev, "Can't allocate memory for device\n"); | |
1031 | return -ENOMEM; | |
1032 | } | |
1033 | info->hdev = hdev; | |
1034 | ||
1035 | hdev->bus = HCI_UART; | |
1036 | hci_set_drvdata(hdev, info); | |
1037 | ||
1038 | hdev->open = hci_h4p_hci_open; | |
1039 | hdev->close = hci_h4p_hci_close; | |
1040 | hdev->flush = hci_h4p_hci_flush; | |
1041 | hdev->send = hci_h4p_hci_send_frame; | |
1042 | set_bit(HCI_QUIRK_RESET_ON_CLOSE, &hdev->quirks); | |
1043 | ||
1044 | SET_HCIDEV_DEV(hdev, info->dev); | |
1045 | ||
1046 | if (hci_h4p_sysfs_create_files(info->dev) < 0) { | |
1047 | dev_err(info->dev, "failed to create sysfs files\n"); | |
1048 | goto free; | |
1049 | } | |
1050 | ||
1051 | if (hci_register_dev(hdev) >= 0) | |
1052 | return 0; | |
1053 | ||
1054 | dev_err(info->dev, "hci_register failed %s.\n", hdev->name); | |
1055 | hci_h4p_sysfs_remove_files(info->dev); | |
1056 | free: | |
1057 | hci_free_dev(info->hdev); | |
1058 | return -ENODEV; | |
1059 | } | |
1060 | ||
1061 | static int hci_h4p_probe(struct platform_device *pdev) | |
1062 | { | |
1063 | struct hci_h4p_platform_data *bt_plat_data; | |
1064 | struct hci_h4p_info *info; | |
1065 | int err; | |
1066 | ||
1067 | dev_info(&pdev->dev, "Registering HCI H4P device\n"); | |
41250ea7 GK |
1068 | info = devm_kzalloc(&pdev->dev, sizeof(struct hci_h4p_info), |
1069 | GFP_KERNEL); | |
91eef3e2 PM |
1070 | if (!info) |
1071 | return -ENOMEM; | |
1072 | ||
1073 | info->dev = &pdev->dev; | |
1074 | info->tx_enabled = 1; | |
1075 | info->rx_enabled = 1; | |
1076 | spin_lock_init(&info->lock); | |
1077 | spin_lock_init(&info->clocks_lock); | |
1078 | skb_queue_head_init(&info->txq); | |
1079 | ||
1080 | if (pdev->dev.platform_data == NULL) { | |
1081 | dev_err(&pdev->dev, "Could not get Bluetooth config data\n"); | |
1082 | return -ENODATA; | |
1083 | } | |
1084 | ||
1085 | bt_plat_data = pdev->dev.platform_data; | |
1086 | info->chip_type = bt_plat_data->chip_type; | |
1087 | info->bt_wakeup_gpio = bt_plat_data->bt_wakeup_gpio; | |
1088 | info->host_wakeup_gpio = bt_plat_data->host_wakeup_gpio; | |
1089 | info->reset_gpio = bt_plat_data->reset_gpio; | |
1090 | info->reset_gpio_shared = bt_plat_data->reset_gpio_shared; | |
1091 | info->bt_sysclk = bt_plat_data->bt_sysclk; | |
1092 | ||
1093 | BT_DBG("RESET gpio: %d", info->reset_gpio); | |
1094 | BT_DBG("BTWU gpio: %d", info->bt_wakeup_gpio); | |
1095 | BT_DBG("HOSTWU gpio: %d", info->host_wakeup_gpio); | |
1096 | BT_DBG("sysclk: %d", info->bt_sysclk); | |
1097 | ||
1098 | init_completion(&info->test_completion); | |
1099 | complete_all(&info->test_completion); | |
1100 | ||
1101 | if (!info->reset_gpio_shared) { | |
1102 | err = devm_gpio_request_one(&pdev->dev, info->reset_gpio, | |
1103 | GPIOF_OUT_INIT_LOW, "bt_reset"); | |
1104 | if (err < 0) { | |
1105 | dev_err(&pdev->dev, "Cannot get GPIO line %d\n", | |
1106 | info->reset_gpio); | |
1107 | return err; | |
1108 | } | |
1109 | } | |
1110 | ||
1111 | err = devm_gpio_request_one(&pdev->dev, info->bt_wakeup_gpio, | |
1112 | GPIOF_OUT_INIT_LOW, "bt_wakeup"); | |
1113 | ||
1114 | if (err < 0) { | |
1115 | dev_err(info->dev, "Cannot get GPIO line 0x%d", | |
1116 | info->bt_wakeup_gpio); | |
1117 | return err; | |
1118 | } | |
1119 | ||
1120 | err = devm_gpio_request_one(&pdev->dev, info->host_wakeup_gpio, | |
1121 | GPIOF_DIR_IN, "host_wakeup"); | |
1122 | if (err < 0) { | |
1123 | dev_err(info->dev, "Cannot get GPIO line %d", | |
1124 | info->host_wakeup_gpio); | |
1125 | return err; | |
1126 | } | |
1127 | ||
1128 | info->irq = bt_plat_data->uart_irq; | |
41250ea7 GK |
1129 | info->uart_base = devm_ioremap(&pdev->dev, bt_plat_data->uart_base, |
1130 | SZ_2K); | |
91eef3e2 PM |
1131 | info->uart_iclk = devm_clk_get(&pdev->dev, bt_plat_data->uart_iclk); |
1132 | info->uart_fclk = devm_clk_get(&pdev->dev, bt_plat_data->uart_fclk); | |
1133 | ||
41250ea7 GK |
1134 | err = devm_request_irq(&pdev->dev, info->irq, hci_h4p_interrupt, |
1135 | IRQF_DISABLED, "hci_h4p", info); | |
91eef3e2 | 1136 | if (err < 0) { |
41250ea7 GK |
1137 | dev_err(info->dev, "hci_h4p: unable to get IRQ %d\n", |
1138 | info->irq); | |
91eef3e2 PM |
1139 | return err; |
1140 | } | |
1141 | ||
1142 | err = devm_request_irq(&pdev->dev, gpio_to_irq(info->host_wakeup_gpio), | |
1143 | hci_h4p_wakeup_interrupt, IRQF_TRIGGER_FALLING | | |
1144 | IRQF_TRIGGER_RISING | IRQF_DISABLED, | |
1145 | "hci_h4p_wkup", info); | |
1146 | if (err < 0) { | |
1147 | dev_err(info->dev, "hci_h4p: unable to get wakeup IRQ %d\n", | |
1148 | gpio_to_irq(info->host_wakeup_gpio)); | |
1149 | return err; | |
1150 | } | |
1151 | ||
1152 | err = irq_set_irq_wake(gpio_to_irq(info->host_wakeup_gpio), 1); | |
1153 | if (err < 0) { | |
1154 | dev_err(info->dev, "hci_h4p: unable to set wakeup for IRQ %d\n", | |
1155 | gpio_to_irq(info->host_wakeup_gpio)); | |
1156 | return err; | |
1157 | } | |
1158 | ||
1159 | init_timer_deferrable(&info->lazy_release); | |
1160 | info->lazy_release.function = hci_h4p_lazy_clock_release; | |
1161 | info->lazy_release.data = (unsigned long)info; | |
1162 | hci_h4p_set_clk(info, &info->tx_clocks_en, 1); | |
1163 | err = hci_h4p_reset_uart(info); | |
1164 | if (err < 0) | |
1165 | return err; | |
1166 | gpio_set_value(info->reset_gpio, 0); | |
1167 | hci_h4p_set_clk(info, &info->tx_clocks_en, 0); | |
1168 | ||
1169 | platform_set_drvdata(pdev, info); | |
1170 | ||
1171 | if (hci_h4p_register_hdev(info) < 0) { | |
1172 | dev_err(info->dev, "failed to register hci_h4p hci device\n"); | |
1173 | return -EINVAL; | |
1174 | } | |
1175 | ||
1176 | return 0; | |
1177 | } | |
1178 | ||
1179 | static int hci_h4p_remove(struct platform_device *pdev) | |
1180 | { | |
1181 | struct hci_h4p_info *info; | |
1182 | ||
1183 | info = platform_get_drvdata(pdev); | |
1184 | ||
1185 | hci_h4p_sysfs_remove_files(info->dev); | |
1186 | hci_h4p_hci_close(info->hdev); | |
1187 | hci_unregister_dev(info->hdev); | |
1188 | hci_free_dev(info->hdev); | |
1189 | ||
1190 | return 0; | |
1191 | } | |
1192 | ||
1193 | static struct platform_driver hci_h4p_driver = { | |
1194 | .probe = hci_h4p_probe, | |
1195 | .remove = hci_h4p_remove, | |
1196 | .driver = { | |
1197 | .name = "hci_h4p", | |
1198 | }, | |
1199 | }; | |
1200 | ||
1201 | module_platform_driver(hci_h4p_driver); | |
1202 | ||
1203 | MODULE_ALIAS("platform:hci_h4p"); | |
1204 | MODULE_DESCRIPTION("Bluetooth h4 driver with nokia extensions"); | |
1205 | MODULE_LICENSE("GPL"); | |
1206 | MODULE_AUTHOR("Ville Tervo"); | |
1207 | MODULE_FIRMWARE(FW_NAME_TI1271_PRELE); | |
1208 | MODULE_FIRMWARE(FW_NAME_TI1271_LE); | |
1209 | MODULE_FIRMWARE(FW_NAME_TI1271); | |
1210 | MODULE_FIRMWARE(FW_NAME_BCM2048); | |
1211 | MODULE_FIRMWARE(FW_NAME_CSR); |