Commit | Line | Data |
---|---|---|
e9a2dd26 MH |
1 | /* |
2 | * | |
3 | * Bluetooth HCI UART driver for Broadcom devices | |
4 | * | |
5 | * Copyright (C) 2015 Intel Corporation | |
6 | * | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | * | |
22 | */ | |
23 | ||
24 | #include <linux/kernel.h> | |
25 | #include <linux/errno.h> | |
26 | #include <linux/skbuff.h> | |
18aeb444 | 27 | #include <linux/firmware.h> |
0395ffc1 FD |
28 | #include <linux/module.h> |
29 | #include <linux/acpi.h> | |
30 | #include <linux/platform_device.h> | |
31 | #include <linux/clk.h> | |
32 | #include <linux/gpio/consumer.h> | |
33 | #include <linux/tty.h> | |
6cc4396c | 34 | #include <linux/interrupt.h> |
5cebdfea | 35 | #include <linux/dmi.h> |
e88ab30d | 36 | #include <linux/pm_runtime.h> |
e9a2dd26 MH |
37 | |
38 | #include <net/bluetooth/bluetooth.h> | |
39 | #include <net/bluetooth/hci_core.h> | |
40 | ||
bdd8818e | 41 | #include "btbcm.h" |
e9a2dd26 | 42 | #include "hci_uart.h" |
bdd8818e | 43 | |
94c58132 MH |
44 | #define BCM_LM_DIAG_PKT 0x07 |
45 | #define BCM_LM_DIAG_SIZE 63 | |
46 | ||
e88ab30d FD |
47 | #define BCM_AUTOSUSPEND_DELAY 5000 /* default autosleep delay */ |
48 | ||
0395ffc1 FD |
49 | struct bcm_device { |
50 | struct list_head list; | |
51 | ||
52 | struct platform_device *pdev; | |
53 | ||
54 | const char *name; | |
55 | struct gpio_desc *device_wakeup; | |
56 | struct gpio_desc *shutdown; | |
57 | ||
58 | struct clk *clk; | |
59 | bool clk_enabled; | |
ae056908 FD |
60 | |
61 | u32 init_speed; | |
6cc4396c FD |
62 | int irq; |
63 | u8 irq_polarity; | |
118612fb | 64 | |
b7a622a2 | 65 | #ifdef CONFIG_PM |
118612fb FD |
66 | struct hci_uart *hu; |
67 | bool is_suspended; /* suspend/resume flag */ | |
68 | #endif | |
0395ffc1 FD |
69 | }; |
70 | ||
bdd8818e | 71 | struct bcm_data { |
0395ffc1 FD |
72 | struct sk_buff *rx_skb; |
73 | struct sk_buff_head txq; | |
74 | ||
75 | struct bcm_device *dev; | |
bdd8818e MH |
76 | }; |
77 | ||
0395ffc1 | 78 | /* List of BCM BT UART devices */ |
bb3ea16a | 79 | static DEFINE_MUTEX(bcm_device_lock); |
0395ffc1 FD |
80 | static LIST_HEAD(bcm_device_list); |
81 | ||
61b2fc2b FD |
82 | static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed) |
83 | { | |
84 | struct hci_dev *hdev = hu->hdev; | |
85 | struct sk_buff *skb; | |
86 | struct bcm_update_uart_baud_rate param; | |
87 | ||
88 | if (speed > 3000000) { | |
89 | struct bcm_write_uart_clock_setting clock; | |
90 | ||
91 | clock.type = BCM_UART_CLOCK_48MHZ; | |
92 | ||
65ad07c9 | 93 | bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type); |
61b2fc2b FD |
94 | |
95 | /* This Broadcom specific command changes the UART's controller | |
96 | * clock for baud rate > 3000000. | |
97 | */ | |
98 | skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT); | |
99 | if (IS_ERR(skb)) { | |
100 | int err = PTR_ERR(skb); | |
65ad07c9 FD |
101 | bt_dev_err(hdev, "BCM: failed to write clock (%d)", |
102 | err); | |
61b2fc2b FD |
103 | return err; |
104 | } | |
105 | ||
106 | kfree_skb(skb); | |
107 | } | |
108 | ||
65ad07c9 | 109 | bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed); |
61b2fc2b FD |
110 | |
111 | param.zero = cpu_to_le16(0); | |
112 | param.baud_rate = cpu_to_le32(speed); | |
113 | ||
114 | /* This Broadcom specific command changes the UART's controller baud | |
115 | * rate. | |
116 | */ | |
117 | skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), ¶m, | |
118 | HCI_INIT_TIMEOUT); | |
119 | if (IS_ERR(skb)) { | |
120 | int err = PTR_ERR(skb); | |
65ad07c9 FD |
121 | bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)", |
122 | err); | |
61b2fc2b FD |
123 | return err; |
124 | } | |
125 | ||
126 | kfree_skb(skb); | |
127 | ||
128 | return 0; | |
129 | } | |
130 | ||
917522aa | 131 | /* bcm_device_exists should be protected by bcm_device_lock */ |
0395ffc1 FD |
132 | static bool bcm_device_exists(struct bcm_device *device) |
133 | { | |
134 | struct list_head *p; | |
135 | ||
136 | list_for_each(p, &bcm_device_list) { | |
137 | struct bcm_device *dev = list_entry(p, struct bcm_device, list); | |
138 | ||
139 | if (device == dev) | |
140 | return true; | |
141 | } | |
142 | ||
143 | return false; | |
144 | } | |
145 | ||
146 | static int bcm_gpio_set_power(struct bcm_device *dev, bool powered) | |
147 | { | |
148 | if (powered && !IS_ERR(dev->clk) && !dev->clk_enabled) | |
149 | clk_enable(dev->clk); | |
150 | ||
2af0a709 LP |
151 | gpiod_set_value(dev->shutdown, powered); |
152 | gpiod_set_value(dev->device_wakeup, powered); | |
0395ffc1 FD |
153 | |
154 | if (!powered && !IS_ERR(dev->clk) && dev->clk_enabled) | |
155 | clk_disable(dev->clk); | |
156 | ||
157 | dev->clk_enabled = powered; | |
158 | ||
159 | return 0; | |
160 | } | |
161 | ||
b7a622a2 | 162 | #ifdef CONFIG_PM |
6cc4396c FD |
163 | static irqreturn_t bcm_host_wake(int irq, void *data) |
164 | { | |
165 | struct bcm_device *bdev = data; | |
166 | ||
167 | bt_dev_dbg(bdev, "Host wake IRQ"); | |
168 | ||
e88ab30d FD |
169 | pm_runtime_get(&bdev->pdev->dev); |
170 | pm_runtime_mark_last_busy(&bdev->pdev->dev); | |
171 | pm_runtime_put_autosuspend(&bdev->pdev->dev); | |
172 | ||
6cc4396c FD |
173 | return IRQ_HANDLED; |
174 | } | |
175 | ||
176 | static int bcm_request_irq(struct bcm_data *bcm) | |
177 | { | |
178 | struct bcm_device *bdev = bcm->dev; | |
179 | int err = 0; | |
180 | ||
181 | /* If this is not a platform device, do not enable PM functionalities */ | |
182 | mutex_lock(&bcm_device_lock); | |
183 | if (!bcm_device_exists(bdev)) { | |
184 | err = -ENODEV; | |
185 | goto unlock; | |
186 | } | |
187 | ||
188 | if (bdev->irq > 0) { | |
189 | err = devm_request_irq(&bdev->pdev->dev, bdev->irq, | |
190 | bcm_host_wake, IRQF_TRIGGER_RISING, | |
191 | "host_wake", bdev); | |
192 | if (err) | |
193 | goto unlock; | |
194 | ||
195 | device_init_wakeup(&bdev->pdev->dev, true); | |
e88ab30d FD |
196 | |
197 | pm_runtime_set_autosuspend_delay(&bdev->pdev->dev, | |
198 | BCM_AUTOSUSPEND_DELAY); | |
199 | pm_runtime_use_autosuspend(&bdev->pdev->dev); | |
200 | pm_runtime_set_active(&bdev->pdev->dev); | |
201 | pm_runtime_enable(&bdev->pdev->dev); | |
6cc4396c FD |
202 | } |
203 | ||
204 | unlock: | |
205 | mutex_unlock(&bcm_device_lock); | |
206 | ||
207 | return err; | |
208 | } | |
209 | ||
210 | static const struct bcm_set_sleep_mode default_sleep_params = { | |
211 | .sleep_mode = 1, /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */ | |
212 | .idle_host = 2, /* idle threshold HOST, in 300ms */ | |
213 | .idle_dev = 2, /* idle threshold device, in 300ms */ | |
214 | .bt_wake_active = 1, /* BT_WAKE active mode: 1 = high, 0 = low */ | |
215 | .host_wake_active = 0, /* HOST_WAKE active mode: 1 = high, 0 = low */ | |
216 | .allow_host_sleep = 1, /* Allow host sleep in SCO flag */ | |
e88ab30d | 217 | .combine_modes = 1, /* Combine sleep and LPM flag */ |
6cc4396c FD |
218 | .tristate_control = 0, /* Allow tri-state control of UART tx flag */ |
219 | /* Irrelevant USB flags */ | |
220 | .usb_auto_sleep = 0, | |
221 | .usb_resume_timeout = 0, | |
222 | .pulsed_host_wake = 0, | |
223 | .break_to_host = 0 | |
224 | }; | |
225 | ||
226 | static int bcm_setup_sleep(struct hci_uart *hu) | |
227 | { | |
228 | struct bcm_data *bcm = hu->priv; | |
229 | struct sk_buff *skb; | |
230 | struct bcm_set_sleep_mode sleep_params = default_sleep_params; | |
231 | ||
232 | sleep_params.host_wake_active = !bcm->dev->irq_polarity; | |
233 | ||
234 | skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params), | |
235 | &sleep_params, HCI_INIT_TIMEOUT); | |
236 | if (IS_ERR(skb)) { | |
237 | int err = PTR_ERR(skb); | |
238 | bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err); | |
239 | return err; | |
240 | } | |
241 | kfree_skb(skb); | |
242 | ||
243 | bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded"); | |
244 | ||
245 | return 0; | |
246 | } | |
247 | #else | |
248 | static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; } | |
249 | static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; } | |
250 | #endif | |
251 | ||
075e1f5e MH |
252 | static int bcm_set_diag(struct hci_dev *hdev, bool enable) |
253 | { | |
254 | struct hci_uart *hu = hci_get_drvdata(hdev); | |
255 | struct bcm_data *bcm = hu->priv; | |
256 | struct sk_buff *skb; | |
257 | ||
258 | if (!test_bit(HCI_RUNNING, &hdev->flags)) | |
259 | return -ENETDOWN; | |
260 | ||
261 | skb = bt_skb_alloc(3, GFP_KERNEL); | |
a1857390 DC |
262 | if (!skb) |
263 | return -ENOMEM; | |
075e1f5e MH |
264 | |
265 | *skb_put(skb, 1) = BCM_LM_DIAG_PKT; | |
266 | *skb_put(skb, 1) = 0xf0; | |
267 | *skb_put(skb, 1) = enable; | |
268 | ||
269 | skb_queue_tail(&bcm->txq, skb); | |
270 | hci_uart_tx_wakeup(hu); | |
271 | ||
272 | return 0; | |
273 | } | |
274 | ||
bdd8818e MH |
275 | static int bcm_open(struct hci_uart *hu) |
276 | { | |
277 | struct bcm_data *bcm; | |
0395ffc1 | 278 | struct list_head *p; |
bdd8818e | 279 | |
65ad07c9 | 280 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
bdd8818e MH |
281 | |
282 | bcm = kzalloc(sizeof(*bcm), GFP_KERNEL); | |
283 | if (!bcm) | |
284 | return -ENOMEM; | |
285 | ||
286 | skb_queue_head_init(&bcm->txq); | |
287 | ||
288 | hu->priv = bcm; | |
0395ffc1 | 289 | |
bb3ea16a | 290 | mutex_lock(&bcm_device_lock); |
0395ffc1 FD |
291 | list_for_each(p, &bcm_device_list) { |
292 | struct bcm_device *dev = list_entry(p, struct bcm_device, list); | |
293 | ||
294 | /* Retrieve saved bcm_device based on parent of the | |
295 | * platform device (saved during device probe) and | |
296 | * parent of tty device used by hci_uart | |
297 | */ | |
298 | if (hu->tty->dev->parent == dev->pdev->dev.parent) { | |
299 | bcm->dev = dev; | |
ae056908 | 300 | hu->init_speed = dev->init_speed; |
b7a622a2 | 301 | #ifdef CONFIG_PM |
118612fb FD |
302 | dev->hu = hu; |
303 | #endif | |
6cc4396c | 304 | bcm_gpio_set_power(bcm->dev, true); |
0395ffc1 FD |
305 | break; |
306 | } | |
307 | } | |
308 | ||
bb3ea16a | 309 | mutex_unlock(&bcm_device_lock); |
0395ffc1 | 310 | |
bdd8818e MH |
311 | return 0; |
312 | } | |
313 | ||
314 | static int bcm_close(struct hci_uart *hu) | |
315 | { | |
316 | struct bcm_data *bcm = hu->priv; | |
6cc4396c | 317 | struct bcm_device *bdev = bcm->dev; |
bdd8818e | 318 | |
65ad07c9 | 319 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
bdd8818e | 320 | |
0395ffc1 | 321 | /* Protect bcm->dev against removal of the device or driver */ |
bb3ea16a | 322 | mutex_lock(&bcm_device_lock); |
6cc4396c FD |
323 | if (bcm_device_exists(bdev)) { |
324 | bcm_gpio_set_power(bdev, false); | |
b7a622a2 | 325 | #ifdef CONFIG_PM |
e88ab30d FD |
326 | pm_runtime_disable(&bdev->pdev->dev); |
327 | pm_runtime_set_suspended(&bdev->pdev->dev); | |
328 | ||
6cc4396c FD |
329 | if (device_can_wakeup(&bdev->pdev->dev)) { |
330 | devm_free_irq(&bdev->pdev->dev, bdev->irq, bdev); | |
331 | device_init_wakeup(&bdev->pdev->dev, false); | |
332 | } | |
333 | ||
334 | bdev->hu = NULL; | |
118612fb FD |
335 | #endif |
336 | } | |
bb3ea16a | 337 | mutex_unlock(&bcm_device_lock); |
0395ffc1 | 338 | |
bdd8818e MH |
339 | skb_queue_purge(&bcm->txq); |
340 | kfree_skb(bcm->rx_skb); | |
341 | kfree(bcm); | |
342 | ||
343 | hu->priv = NULL; | |
344 | return 0; | |
345 | } | |
346 | ||
347 | static int bcm_flush(struct hci_uart *hu) | |
348 | { | |
349 | struct bcm_data *bcm = hu->priv; | |
350 | ||
65ad07c9 | 351 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
bdd8818e MH |
352 | |
353 | skb_queue_purge(&bcm->txq); | |
354 | ||
355 | return 0; | |
356 | } | |
357 | ||
358 | static int bcm_setup(struct hci_uart *hu) | |
359 | { | |
6cc4396c | 360 | struct bcm_data *bcm = hu->priv; |
6be09b48 FD |
361 | char fw_name[64]; |
362 | const struct firmware *fw; | |
960ef1d7 | 363 | unsigned int speed; |
6be09b48 FD |
364 | int err; |
365 | ||
65ad07c9 | 366 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
bdd8818e | 367 | |
075e1f5e | 368 | hu->hdev->set_diag = bcm_set_diag; |
bdd8818e MH |
369 | hu->hdev->set_bdaddr = btbcm_set_bdaddr; |
370 | ||
6be09b48 FD |
371 | err = btbcm_initialize(hu->hdev, fw_name, sizeof(fw_name)); |
372 | if (err) | |
373 | return err; | |
374 | ||
375 | err = request_firmware(&fw, fw_name, &hu->hdev->dev); | |
376 | if (err < 0) { | |
65ad07c9 | 377 | bt_dev_info(hu->hdev, "BCM: Patch %s not found", fw_name); |
6be09b48 FD |
378 | return 0; |
379 | } | |
380 | ||
381 | err = btbcm_patchram(hu->hdev, fw); | |
382 | if (err) { | |
65ad07c9 | 383 | bt_dev_info(hu->hdev, "BCM: Patch failed (%d)", err); |
6be09b48 FD |
384 | goto finalize; |
385 | } | |
386 | ||
960ef1d7 FD |
387 | /* Init speed if any */ |
388 | if (hu->init_speed) | |
389 | speed = hu->init_speed; | |
390 | else if (hu->proto->init_speed) | |
391 | speed = hu->proto->init_speed; | |
392 | else | |
393 | speed = 0; | |
394 | ||
395 | if (speed) | |
396 | hci_uart_set_baudrate(hu, speed); | |
397 | ||
398 | /* Operational speed if any */ | |
399 | if (hu->oper_speed) | |
400 | speed = hu->oper_speed; | |
401 | else if (hu->proto->oper_speed) | |
402 | speed = hu->proto->oper_speed; | |
403 | else | |
404 | speed = 0; | |
405 | ||
406 | if (speed) { | |
407 | err = bcm_set_baudrate(hu, speed); | |
61b2fc2b | 408 | if (!err) |
960ef1d7 | 409 | hci_uart_set_baudrate(hu, speed); |
61b2fc2b FD |
410 | } |
411 | ||
6be09b48 FD |
412 | finalize: |
413 | release_firmware(fw); | |
414 | ||
415 | err = btbcm_finalize(hu->hdev); | |
6cc4396c FD |
416 | if (err) |
417 | return err; | |
418 | ||
419 | err = bcm_request_irq(bcm); | |
420 | if (!err) | |
421 | err = bcm_setup_sleep(hu); | |
6be09b48 FD |
422 | |
423 | return err; | |
bdd8818e MH |
424 | } |
425 | ||
94c58132 MH |
426 | #define BCM_RECV_LM_DIAG \ |
427 | .type = BCM_LM_DIAG_PKT, \ | |
428 | .hlen = BCM_LM_DIAG_SIZE, \ | |
429 | .loff = 0, \ | |
430 | .lsize = 0, \ | |
431 | .maxlen = BCM_LM_DIAG_SIZE | |
432 | ||
79b8df93 | 433 | static const struct h4_recv_pkt bcm_recv_pkts[] = { |
94c58132 MH |
434 | { H4_RECV_ACL, .recv = hci_recv_frame }, |
435 | { H4_RECV_SCO, .recv = hci_recv_frame }, | |
436 | { H4_RECV_EVENT, .recv = hci_recv_frame }, | |
437 | { BCM_RECV_LM_DIAG, .recv = hci_recv_diag }, | |
79b8df93 MH |
438 | }; |
439 | ||
bdd8818e MH |
440 | static int bcm_recv(struct hci_uart *hu, const void *data, int count) |
441 | { | |
442 | struct bcm_data *bcm = hu->priv; | |
443 | ||
444 | if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) | |
445 | return -EUNATCH; | |
446 | ||
79b8df93 MH |
447 | bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count, |
448 | bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts)); | |
bdd8818e MH |
449 | if (IS_ERR(bcm->rx_skb)) { |
450 | int err = PTR_ERR(bcm->rx_skb); | |
65ad07c9 | 451 | bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err); |
37134167 | 452 | bcm->rx_skb = NULL; |
bdd8818e | 453 | return err; |
e88ab30d FD |
454 | } else if (!bcm->rx_skb) { |
455 | /* Delay auto-suspend when receiving completed packet */ | |
456 | mutex_lock(&bcm_device_lock); | |
457 | if (bcm->dev && bcm_device_exists(bcm->dev)) { | |
458 | pm_runtime_get(&bcm->dev->pdev->dev); | |
459 | pm_runtime_mark_last_busy(&bcm->dev->pdev->dev); | |
460 | pm_runtime_put_autosuspend(&bcm->dev->pdev->dev); | |
461 | } | |
462 | mutex_unlock(&bcm_device_lock); | |
bdd8818e MH |
463 | } |
464 | ||
465 | return count; | |
466 | } | |
467 | ||
468 | static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb) | |
469 | { | |
470 | struct bcm_data *bcm = hu->priv; | |
471 | ||
65ad07c9 | 472 | bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb); |
bdd8818e MH |
473 | |
474 | /* Prepend skb with frame type */ | |
618e8bc2 | 475 | memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); |
bdd8818e MH |
476 | skb_queue_tail(&bcm->txq, skb); |
477 | ||
478 | return 0; | |
479 | } | |
480 | ||
481 | static struct sk_buff *bcm_dequeue(struct hci_uart *hu) | |
482 | { | |
483 | struct bcm_data *bcm = hu->priv; | |
e88ab30d FD |
484 | struct sk_buff *skb = NULL; |
485 | struct bcm_device *bdev = NULL; | |
486 | ||
487 | mutex_lock(&bcm_device_lock); | |
488 | ||
489 | if (bcm_device_exists(bcm->dev)) { | |
490 | bdev = bcm->dev; | |
491 | pm_runtime_get_sync(&bdev->pdev->dev); | |
492 | /* Shall be resumed here */ | |
493 | } | |
494 | ||
495 | skb = skb_dequeue(&bcm->txq); | |
496 | ||
497 | if (bdev) { | |
498 | pm_runtime_mark_last_busy(&bdev->pdev->dev); | |
499 | pm_runtime_put_autosuspend(&bdev->pdev->dev); | |
500 | } | |
bdd8818e | 501 | |
e88ab30d FD |
502 | mutex_unlock(&bcm_device_lock); |
503 | ||
504 | return skb; | |
bdd8818e MH |
505 | } |
506 | ||
b7a622a2 FD |
507 | #ifdef CONFIG_PM |
508 | static int bcm_suspend_device(struct device *dev) | |
118612fb FD |
509 | { |
510 | struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev)); | |
511 | ||
b7a622a2 | 512 | bt_dev_dbg(bdev, ""); |
917522aa | 513 | |
b7a622a2 | 514 | if (!bdev->is_suspended && bdev->hu) { |
118612fb FD |
515 | hci_uart_set_flow_control(bdev->hu, true); |
516 | ||
b7a622a2 | 517 | /* Once this returns, driver suspends BT via GPIO */ |
118612fb FD |
518 | bdev->is_suspended = true; |
519 | } | |
520 | ||
521 | /* Suspend the device */ | |
522 | if (bdev->device_wakeup) { | |
523 | gpiod_set_value(bdev->device_wakeup, false); | |
65ad07c9 | 524 | bt_dev_dbg(bdev, "suspend, delaying 15 ms"); |
118612fb FD |
525 | mdelay(15); |
526 | } | |
527 | ||
b7a622a2 FD |
528 | return 0; |
529 | } | |
530 | ||
531 | static int bcm_resume_device(struct device *dev) | |
532 | { | |
533 | struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev)); | |
534 | ||
535 | bt_dev_dbg(bdev, ""); | |
536 | ||
537 | if (bdev->device_wakeup) { | |
538 | gpiod_set_value(bdev->device_wakeup, true); | |
539 | bt_dev_dbg(bdev, "resume, delaying 15 ms"); | |
540 | mdelay(15); | |
541 | } | |
542 | ||
543 | /* When this executes, the device has woken up already */ | |
544 | if (bdev->is_suspended && bdev->hu) { | |
545 | bdev->is_suspended = false; | |
546 | ||
547 | hci_uart_set_flow_control(bdev->hu, false); | |
548 | } | |
549 | ||
550 | return 0; | |
551 | } | |
552 | #endif | |
553 | ||
554 | #ifdef CONFIG_PM_SLEEP | |
555 | /* Platform suspend callback */ | |
556 | static int bcm_suspend(struct device *dev) | |
557 | { | |
558 | struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev)); | |
559 | int error; | |
560 | ||
561 | bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended); | |
562 | ||
563 | /* bcm_suspend can be called at any time as long as platform device is | |
564 | * bound, so it should use bcm_device_lock to protect access to hci_uart | |
565 | * and device_wake-up GPIO. | |
566 | */ | |
567 | mutex_lock(&bcm_device_lock); | |
568 | ||
569 | if (!bdev->hu) | |
570 | goto unlock; | |
571 | ||
e88ab30d FD |
572 | if (pm_runtime_active(dev)) |
573 | bcm_suspend_device(dev); | |
b7a622a2 | 574 | |
6cc4396c FD |
575 | if (device_may_wakeup(&bdev->pdev->dev)) { |
576 | error = enable_irq_wake(bdev->irq); | |
577 | if (!error) | |
578 | bt_dev_dbg(bdev, "BCM irq: enabled"); | |
579 | } | |
580 | ||
917522aa | 581 | unlock: |
bb3ea16a | 582 | mutex_unlock(&bcm_device_lock); |
917522aa | 583 | |
118612fb FD |
584 | return 0; |
585 | } | |
586 | ||
587 | /* Platform resume callback */ | |
588 | static int bcm_resume(struct device *dev) | |
589 | { | |
590 | struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev)); | |
591 | ||
65ad07c9 | 592 | bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended); |
118612fb | 593 | |
b7a622a2 FD |
594 | /* bcm_resume can be called at any time as long as platform device is |
595 | * bound, so it should use bcm_device_lock to protect access to hci_uart | |
596 | * and device_wake-up GPIO. | |
597 | */ | |
bb3ea16a | 598 | mutex_lock(&bcm_device_lock); |
917522aa FD |
599 | |
600 | if (!bdev->hu) | |
601 | goto unlock; | |
602 | ||
6cc4396c FD |
603 | if (device_may_wakeup(&bdev->pdev->dev)) { |
604 | disable_irq_wake(bdev->irq); | |
605 | bt_dev_dbg(bdev, "BCM irq: disabled"); | |
606 | } | |
607 | ||
b7a622a2 | 608 | bcm_resume_device(dev); |
118612fb | 609 | |
917522aa | 610 | unlock: |
bb3ea16a | 611 | mutex_unlock(&bcm_device_lock); |
917522aa | 612 | |
e88ab30d FD |
613 | pm_runtime_disable(dev); |
614 | pm_runtime_set_active(dev); | |
615 | pm_runtime_enable(dev); | |
616 | ||
118612fb FD |
617 | return 0; |
618 | } | |
619 | #endif | |
620 | ||
0395ffc1 FD |
621 | static const struct acpi_gpio_params device_wakeup_gpios = { 0, 0, false }; |
622 | static const struct acpi_gpio_params shutdown_gpios = { 1, 0, false }; | |
6cc4396c | 623 | static const struct acpi_gpio_params host_wakeup_gpios = { 2, 0, false }; |
0395ffc1 FD |
624 | |
625 | static const struct acpi_gpio_mapping acpi_bcm_default_gpios[] = { | |
626 | { "device-wakeup-gpios", &device_wakeup_gpios, 1 }, | |
627 | { "shutdown-gpios", &shutdown_gpios, 1 }, | |
6cc4396c | 628 | { "host-wakeup-gpios", &host_wakeup_gpios, 1 }, |
0395ffc1 FD |
629 | { }, |
630 | }; | |
631 | ||
50d78bcf | 632 | #ifdef CONFIG_ACPI |
5cebdfea FD |
633 | static u8 acpi_active_low = ACPI_ACTIVE_LOW; |
634 | ||
635 | /* IRQ polarity of some chipsets are not defined correctly in ACPI table. */ | |
636 | static const struct dmi_system_id bcm_wrong_irq_dmi_table[] = { | |
637 | { | |
638 | .ident = "Asus T100TA", | |
639 | .matches = { | |
640 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, | |
641 | "ASUSTeK COMPUTER INC."), | |
642 | DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T100TA"), | |
643 | }, | |
644 | .driver_data = &acpi_active_low, | |
645 | }, | |
646 | { } | |
647 | }; | |
648 | ||
ae056908 FD |
649 | static int bcm_resource(struct acpi_resource *ares, void *data) |
650 | { | |
651 | struct bcm_device *dev = data; | |
6cc4396c FD |
652 | struct acpi_resource_extended_irq *irq; |
653 | struct acpi_resource_gpio *gpio; | |
654 | struct acpi_resource_uart_serialbus *sb; | |
655 | ||
656 | switch (ares->type) { | |
657 | case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: | |
658 | irq = &ares->data.extended_irq; | |
659 | dev->irq_polarity = irq->polarity; | |
660 | break; | |
661 | ||
662 | case ACPI_RESOURCE_TYPE_GPIO: | |
663 | gpio = &ares->data.gpio; | |
664 | if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) | |
665 | dev->irq_polarity = gpio->polarity; | |
666 | break; | |
667 | ||
668 | case ACPI_RESOURCE_TYPE_SERIAL_BUS: | |
ae056908 FD |
669 | sb = &ares->data.uart_serial_bus; |
670 | if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) | |
671 | dev->init_speed = sb->default_baud_rate; | |
6cc4396c FD |
672 | break; |
673 | ||
674 | default: | |
675 | break; | |
ae056908 FD |
676 | } |
677 | ||
678 | /* Always tell the ACPI core to skip this resource */ | |
679 | return 1; | |
680 | } | |
681 | ||
0395ffc1 FD |
682 | static int bcm_acpi_probe(struct bcm_device *dev) |
683 | { | |
684 | struct platform_device *pdev = dev->pdev; | |
ae056908 | 685 | LIST_HEAD(resources); |
5cebdfea | 686 | const struct dmi_system_id *dmi_id; |
0395ffc1 FD |
687 | int ret; |
688 | ||
0395ffc1 FD |
689 | /* Retrieve GPIO data */ |
690 | dev->name = dev_name(&pdev->dev); | |
691 | ret = acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev), | |
692 | acpi_bcm_default_gpios); | |
693 | if (ret) | |
694 | return ret; | |
695 | ||
696 | dev->clk = devm_clk_get(&pdev->dev, NULL); | |
697 | ||
62aaefa7 UKK |
698 | dev->device_wakeup = devm_gpiod_get_optional(&pdev->dev, |
699 | "device-wakeup", | |
700 | GPIOD_OUT_LOW); | |
701 | if (IS_ERR(dev->device_wakeup)) | |
702 | return PTR_ERR(dev->device_wakeup); | |
0395ffc1 | 703 | |
62aaefa7 UKK |
704 | dev->shutdown = devm_gpiod_get_optional(&pdev->dev, "shutdown", |
705 | GPIOD_OUT_LOW); | |
706 | if (IS_ERR(dev->shutdown)) | |
707 | return PTR_ERR(dev->shutdown); | |
0395ffc1 | 708 | |
6cc4396c FD |
709 | /* IRQ can be declared in ACPI table as Interrupt or GpioInt */ |
710 | dev->irq = platform_get_irq(pdev, 0); | |
711 | if (dev->irq <= 0) { | |
712 | struct gpio_desc *gpio; | |
713 | ||
714 | gpio = devm_gpiod_get_optional(&pdev->dev, "host-wakeup", | |
715 | GPIOD_IN); | |
716 | if (IS_ERR(gpio)) | |
717 | return PTR_ERR(gpio); | |
718 | ||
719 | dev->irq = gpiod_to_irq(gpio); | |
720 | } | |
721 | ||
722 | dev_info(&pdev->dev, "BCM irq: %d\n", dev->irq); | |
723 | ||
0395ffc1 FD |
724 | /* Make sure at-least one of the GPIO is defined and that |
725 | * a name is specified for this instance | |
726 | */ | |
727 | if ((!dev->device_wakeup && !dev->shutdown) || !dev->name) { | |
728 | dev_err(&pdev->dev, "invalid platform data\n"); | |
729 | return -EINVAL; | |
730 | } | |
731 | ||
ae056908 | 732 | /* Retrieve UART ACPI info */ |
e98d6d62 JN |
733 | ret = acpi_dev_get_resources(ACPI_COMPANION(&dev->pdev->dev), |
734 | &resources, bcm_resource, dev); | |
5be00284 JN |
735 | if (ret < 0) |
736 | return ret; | |
09dbf1b7 | 737 | acpi_dev_free_resource_list(&resources); |
ae056908 | 738 | |
5cebdfea FD |
739 | dmi_id = dmi_first_match(bcm_wrong_irq_dmi_table); |
740 | if (dmi_id) { | |
741 | bt_dev_warn(dev, "%s: Overwriting IRQ polarity to active low", | |
742 | dmi_id->ident); | |
743 | dev->irq_polarity = *(u8 *)dmi_id->driver_data; | |
744 | } | |
745 | ||
0395ffc1 FD |
746 | return 0; |
747 | } | |
50d78bcf FD |
748 | #else |
749 | static int bcm_acpi_probe(struct bcm_device *dev) | |
750 | { | |
751 | return -EINVAL; | |
752 | } | |
753 | #endif /* CONFIG_ACPI */ | |
0395ffc1 FD |
754 | |
755 | static int bcm_probe(struct platform_device *pdev) | |
756 | { | |
757 | struct bcm_device *dev; | |
0395ffc1 FD |
758 | int ret; |
759 | ||
760 | dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); | |
761 | if (!dev) | |
762 | return -ENOMEM; | |
763 | ||
764 | dev->pdev = pdev; | |
765 | ||
4d1c4558 JN |
766 | ret = bcm_acpi_probe(dev); |
767 | if (ret) | |
768 | return ret; | |
0395ffc1 FD |
769 | |
770 | platform_set_drvdata(pdev, dev); | |
771 | ||
772 | dev_info(&pdev->dev, "%s device registered.\n", dev->name); | |
773 | ||
774 | /* Place this instance on the device list */ | |
bb3ea16a | 775 | mutex_lock(&bcm_device_lock); |
0395ffc1 | 776 | list_add_tail(&dev->list, &bcm_device_list); |
bb3ea16a | 777 | mutex_unlock(&bcm_device_lock); |
0395ffc1 FD |
778 | |
779 | bcm_gpio_set_power(dev, false); | |
780 | ||
781 | return 0; | |
782 | } | |
783 | ||
784 | static int bcm_remove(struct platform_device *pdev) | |
785 | { | |
786 | struct bcm_device *dev = platform_get_drvdata(pdev); | |
787 | ||
bb3ea16a | 788 | mutex_lock(&bcm_device_lock); |
0395ffc1 | 789 | list_del(&dev->list); |
bb3ea16a | 790 | mutex_unlock(&bcm_device_lock); |
0395ffc1 FD |
791 | |
792 | acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pdev->dev)); | |
793 | ||
794 | dev_info(&pdev->dev, "%s device unregistered.\n", dev->name); | |
795 | ||
796 | return 0; | |
797 | } | |
798 | ||
bdd8818e MH |
799 | static const struct hci_uart_proto bcm_proto = { |
800 | .id = HCI_UART_BCM, | |
801 | .name = "BCM", | |
aee61f7a | 802 | .manufacturer = 15, |
61b2fc2b FD |
803 | .init_speed = 115200, |
804 | .oper_speed = 4000000, | |
bdd8818e MH |
805 | .open = bcm_open, |
806 | .close = bcm_close, | |
807 | .flush = bcm_flush, | |
808 | .setup = bcm_setup, | |
61b2fc2b | 809 | .set_baudrate = bcm_set_baudrate, |
bdd8818e MH |
810 | .recv = bcm_recv, |
811 | .enqueue = bcm_enqueue, | |
812 | .dequeue = bcm_dequeue, | |
813 | }; | |
814 | ||
0395ffc1 FD |
815 | #ifdef CONFIG_ACPI |
816 | static const struct acpi_device_id bcm_acpi_match[] = { | |
d3d20725 | 817 | { "BCM2E1A", 0 }, |
0395ffc1 | 818 | { "BCM2E39", 0 }, |
adbdeae5 | 819 | { "BCM2E3A", 0 }, |
d3d20725 | 820 | { "BCM2E3D", 0 }, |
adbdeae5 | 821 | { "BCM2E3F", 0 }, |
d3d20725 HK |
822 | { "BCM2E40", 0 }, |
823 | { "BCM2E64", 0 }, | |
806f50c7 | 824 | { "BCM2E65", 0 }, |
0395ffc1 | 825 | { "BCM2E67", 0 }, |
adbdeae5 | 826 | { "BCM2E7B", 0 }, |
0395ffc1 FD |
827 | { }, |
828 | }; | |
829 | MODULE_DEVICE_TABLE(acpi, bcm_acpi_match); | |
830 | #endif | |
831 | ||
118612fb | 832 | /* Platform suspend and resume callbacks */ |
e88ab30d FD |
833 | static const struct dev_pm_ops bcm_pm_ops = { |
834 | SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume) | |
835 | SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL) | |
836 | }; | |
118612fb | 837 | |
0395ffc1 FD |
838 | static struct platform_driver bcm_driver = { |
839 | .probe = bcm_probe, | |
840 | .remove = bcm_remove, | |
841 | .driver = { | |
842 | .name = "hci_bcm", | |
843 | .acpi_match_table = ACPI_PTR(bcm_acpi_match), | |
118612fb | 844 | .pm = &bcm_pm_ops, |
0395ffc1 FD |
845 | }, |
846 | }; | |
847 | ||
bdd8818e MH |
848 | int __init bcm_init(void) |
849 | { | |
0395ffc1 FD |
850 | platform_driver_register(&bcm_driver); |
851 | ||
bdd8818e MH |
852 | return hci_uart_register_proto(&bcm_proto); |
853 | } | |
854 | ||
855 | int __exit bcm_deinit(void) | |
856 | { | |
0395ffc1 FD |
857 | platform_driver_unregister(&bcm_driver); |
858 | ||
bdd8818e MH |
859 | return hci_uart_unregister_proto(&bcm_proto); |
860 | } |