]>
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> | |
33cd149e LP |
30 | #include <linux/of.h> |
31 | #include <linux/property.h> | |
0395ffc1 FD |
32 | #include <linux/platform_device.h> |
33 | #include <linux/clk.h> | |
34 | #include <linux/gpio/consumer.h> | |
35 | #include <linux/tty.h> | |
6cc4396c | 36 | #include <linux/interrupt.h> |
5cebdfea | 37 | #include <linux/dmi.h> |
e88ab30d | 38 | #include <linux/pm_runtime.h> |
33cd149e | 39 | #include <linux/serdev.h> |
e9a2dd26 MH |
40 | |
41 | #include <net/bluetooth/bluetooth.h> | |
42 | #include <net/bluetooth/hci_core.h> | |
43 | ||
bdd8818e | 44 | #include "btbcm.h" |
e9a2dd26 | 45 | #include "hci_uart.h" |
bdd8818e | 46 | |
94c58132 MH |
47 | #define BCM_LM_DIAG_PKT 0x07 |
48 | #define BCM_LM_DIAG_SIZE 63 | |
49 | ||
e88ab30d FD |
50 | #define BCM_AUTOSUSPEND_DELAY 5000 /* default autosleep delay */ |
51 | ||
33cd149e | 52 | /* platform device driver resources */ |
0395ffc1 FD |
53 | struct bcm_device { |
54 | struct list_head list; | |
55 | ||
56 | struct platform_device *pdev; | |
57 | ||
58 | const char *name; | |
59 | struct gpio_desc *device_wakeup; | |
60 | struct gpio_desc *shutdown; | |
61 | ||
62 | struct clk *clk; | |
63 | bool clk_enabled; | |
ae056908 FD |
64 | |
65 | u32 init_speed; | |
74183a1c | 66 | u32 oper_speed; |
6cc4396c FD |
67 | int irq; |
68 | u8 irq_polarity; | |
118612fb | 69 | |
b7a622a2 | 70 | #ifdef CONFIG_PM |
118612fb FD |
71 | struct hci_uart *hu; |
72 | bool is_suspended; /* suspend/resume flag */ | |
73 | #endif | |
0395ffc1 FD |
74 | }; |
75 | ||
33cd149e LP |
76 | /* serdev driver resources */ |
77 | struct bcm_serdev { | |
78 | struct hci_uart hu; | |
79 | }; | |
80 | ||
81 | /* generic bcm uart resources */ | |
bdd8818e | 82 | struct bcm_data { |
0395ffc1 FD |
83 | struct sk_buff *rx_skb; |
84 | struct sk_buff_head txq; | |
85 | ||
86 | struct bcm_device *dev; | |
bdd8818e MH |
87 | }; |
88 | ||
0395ffc1 | 89 | /* List of BCM BT UART devices */ |
bb3ea16a | 90 | static DEFINE_MUTEX(bcm_device_lock); |
0395ffc1 FD |
91 | static LIST_HEAD(bcm_device_list); |
92 | ||
33cd149e LP |
93 | static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed) |
94 | { | |
95 | if (hu->serdev) | |
96 | serdev_device_set_baudrate(hu->serdev, speed); | |
97 | else | |
98 | hci_uart_set_baudrate(hu, speed); | |
99 | } | |
100 | ||
61b2fc2b FD |
101 | static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed) |
102 | { | |
103 | struct hci_dev *hdev = hu->hdev; | |
104 | struct sk_buff *skb; | |
105 | struct bcm_update_uart_baud_rate param; | |
106 | ||
107 | if (speed > 3000000) { | |
108 | struct bcm_write_uart_clock_setting clock; | |
109 | ||
110 | clock.type = BCM_UART_CLOCK_48MHZ; | |
111 | ||
65ad07c9 | 112 | bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type); |
61b2fc2b FD |
113 | |
114 | /* This Broadcom specific command changes the UART's controller | |
115 | * clock for baud rate > 3000000. | |
116 | */ | |
117 | skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT); | |
118 | if (IS_ERR(skb)) { | |
119 | int err = PTR_ERR(skb); | |
65ad07c9 FD |
120 | bt_dev_err(hdev, "BCM: failed to write clock (%d)", |
121 | err); | |
61b2fc2b FD |
122 | return err; |
123 | } | |
124 | ||
125 | kfree_skb(skb); | |
126 | } | |
127 | ||
65ad07c9 | 128 | bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed); |
61b2fc2b FD |
129 | |
130 | param.zero = cpu_to_le16(0); | |
131 | param.baud_rate = cpu_to_le32(speed); | |
132 | ||
133 | /* This Broadcom specific command changes the UART's controller baud | |
134 | * rate. | |
135 | */ | |
136 | skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), ¶m, | |
137 | HCI_INIT_TIMEOUT); | |
138 | if (IS_ERR(skb)) { | |
139 | int err = PTR_ERR(skb); | |
65ad07c9 FD |
140 | bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)", |
141 | err); | |
61b2fc2b FD |
142 | return err; |
143 | } | |
144 | ||
145 | kfree_skb(skb); | |
146 | ||
147 | return 0; | |
148 | } | |
149 | ||
917522aa | 150 | /* bcm_device_exists should be protected by bcm_device_lock */ |
0395ffc1 FD |
151 | static bool bcm_device_exists(struct bcm_device *device) |
152 | { | |
153 | struct list_head *p; | |
154 | ||
155 | list_for_each(p, &bcm_device_list) { | |
156 | struct bcm_device *dev = list_entry(p, struct bcm_device, list); | |
157 | ||
158 | if (device == dev) | |
159 | return true; | |
160 | } | |
161 | ||
162 | return false; | |
163 | } | |
164 | ||
165 | static int bcm_gpio_set_power(struct bcm_device *dev, bool powered) | |
166 | { | |
167 | if (powered && !IS_ERR(dev->clk) && !dev->clk_enabled) | |
730ce397 | 168 | clk_prepare_enable(dev->clk); |
0395ffc1 | 169 | |
2af0a709 LP |
170 | gpiod_set_value(dev->shutdown, powered); |
171 | gpiod_set_value(dev->device_wakeup, powered); | |
0395ffc1 FD |
172 | |
173 | if (!powered && !IS_ERR(dev->clk) && dev->clk_enabled) | |
730ce397 | 174 | clk_disable_unprepare(dev->clk); |
0395ffc1 FD |
175 | |
176 | dev->clk_enabled = powered; | |
177 | ||
178 | return 0; | |
179 | } | |
180 | ||
b7a622a2 | 181 | #ifdef CONFIG_PM |
6cc4396c FD |
182 | static irqreturn_t bcm_host_wake(int irq, void *data) |
183 | { | |
184 | struct bcm_device *bdev = data; | |
185 | ||
186 | bt_dev_dbg(bdev, "Host wake IRQ"); | |
187 | ||
e88ab30d FD |
188 | pm_runtime_get(&bdev->pdev->dev); |
189 | pm_runtime_mark_last_busy(&bdev->pdev->dev); | |
190 | pm_runtime_put_autosuspend(&bdev->pdev->dev); | |
191 | ||
6cc4396c FD |
192 | return IRQ_HANDLED; |
193 | } | |
194 | ||
195 | static int bcm_request_irq(struct bcm_data *bcm) | |
196 | { | |
197 | struct bcm_device *bdev = bcm->dev; | |
98dc77d5 | 198 | int err; |
6cc4396c FD |
199 | |
200 | /* If this is not a platform device, do not enable PM functionalities */ | |
201 | mutex_lock(&bcm_device_lock); | |
202 | if (!bcm_device_exists(bdev)) { | |
203 | err = -ENODEV; | |
204 | goto unlock; | |
205 | } | |
206 | ||
98dc77d5 LP |
207 | if (bdev->irq <= 0) { |
208 | err = -EOPNOTSUPP; | |
209 | goto unlock; | |
210 | } | |
6cc4396c | 211 | |
98dc77d5 LP |
212 | err = devm_request_irq(&bdev->pdev->dev, bdev->irq, bcm_host_wake, |
213 | IRQF_TRIGGER_RISING, "host_wake", bdev); | |
214 | if (err) | |
215 | goto unlock; | |
e88ab30d | 216 | |
98dc77d5 LP |
217 | device_init_wakeup(&bdev->pdev->dev, true); |
218 | ||
219 | pm_runtime_set_autosuspend_delay(&bdev->pdev->dev, | |
220 | BCM_AUTOSUSPEND_DELAY); | |
221 | pm_runtime_use_autosuspend(&bdev->pdev->dev); | |
222 | pm_runtime_set_active(&bdev->pdev->dev); | |
223 | pm_runtime_enable(&bdev->pdev->dev); | |
6cc4396c FD |
224 | |
225 | unlock: | |
226 | mutex_unlock(&bcm_device_lock); | |
227 | ||
228 | return err; | |
229 | } | |
230 | ||
231 | static const struct bcm_set_sleep_mode default_sleep_params = { | |
232 | .sleep_mode = 1, /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */ | |
233 | .idle_host = 2, /* idle threshold HOST, in 300ms */ | |
234 | .idle_dev = 2, /* idle threshold device, in 300ms */ | |
235 | .bt_wake_active = 1, /* BT_WAKE active mode: 1 = high, 0 = low */ | |
236 | .host_wake_active = 0, /* HOST_WAKE active mode: 1 = high, 0 = low */ | |
237 | .allow_host_sleep = 1, /* Allow host sleep in SCO flag */ | |
e88ab30d | 238 | .combine_modes = 1, /* Combine sleep and LPM flag */ |
6cc4396c FD |
239 | .tristate_control = 0, /* Allow tri-state control of UART tx flag */ |
240 | /* Irrelevant USB flags */ | |
241 | .usb_auto_sleep = 0, | |
242 | .usb_resume_timeout = 0, | |
243 | .pulsed_host_wake = 0, | |
244 | .break_to_host = 0 | |
245 | }; | |
246 | ||
247 | static int bcm_setup_sleep(struct hci_uart *hu) | |
248 | { | |
249 | struct bcm_data *bcm = hu->priv; | |
250 | struct sk_buff *skb; | |
251 | struct bcm_set_sleep_mode sleep_params = default_sleep_params; | |
252 | ||
253 | sleep_params.host_wake_active = !bcm->dev->irq_polarity; | |
254 | ||
255 | skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params), | |
256 | &sleep_params, HCI_INIT_TIMEOUT); | |
257 | if (IS_ERR(skb)) { | |
258 | int err = PTR_ERR(skb); | |
259 | bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err); | |
260 | return err; | |
261 | } | |
262 | kfree_skb(skb); | |
263 | ||
264 | bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded"); | |
265 | ||
266 | return 0; | |
267 | } | |
268 | #else | |
269 | static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; } | |
270 | static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; } | |
271 | #endif | |
272 | ||
075e1f5e MH |
273 | static int bcm_set_diag(struct hci_dev *hdev, bool enable) |
274 | { | |
275 | struct hci_uart *hu = hci_get_drvdata(hdev); | |
276 | struct bcm_data *bcm = hu->priv; | |
277 | struct sk_buff *skb; | |
278 | ||
279 | if (!test_bit(HCI_RUNNING, &hdev->flags)) | |
280 | return -ENETDOWN; | |
281 | ||
282 | skb = bt_skb_alloc(3, GFP_KERNEL); | |
a1857390 DC |
283 | if (!skb) |
284 | return -ENOMEM; | |
075e1f5e | 285 | |
634fef61 JB |
286 | skb_put_u8(skb, BCM_LM_DIAG_PKT); |
287 | skb_put_u8(skb, 0xf0); | |
288 | skb_put_u8(skb, enable); | |
075e1f5e MH |
289 | |
290 | skb_queue_tail(&bcm->txq, skb); | |
291 | hci_uart_tx_wakeup(hu); | |
292 | ||
293 | return 0; | |
294 | } | |
295 | ||
bdd8818e MH |
296 | static int bcm_open(struct hci_uart *hu) |
297 | { | |
298 | struct bcm_data *bcm; | |
0395ffc1 | 299 | struct list_head *p; |
bdd8818e | 300 | |
65ad07c9 | 301 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
bdd8818e MH |
302 | |
303 | bcm = kzalloc(sizeof(*bcm), GFP_KERNEL); | |
304 | if (!bcm) | |
305 | return -ENOMEM; | |
306 | ||
307 | skb_queue_head_init(&bcm->txq); | |
308 | ||
309 | hu->priv = bcm; | |
0395ffc1 | 310 | |
33cd149e LP |
311 | /* If this is a serdev defined device, then only use |
312 | * serdev open primitive and skip the rest. | |
313 | */ | |
314 | if (hu->serdev) { | |
315 | serdev_device_open(hu->serdev); | |
316 | goto out; | |
317 | } | |
318 | ||
95065a61 JH |
319 | if (!hu->tty->dev) |
320 | goto out; | |
321 | ||
bb3ea16a | 322 | mutex_lock(&bcm_device_lock); |
0395ffc1 FD |
323 | list_for_each(p, &bcm_device_list) { |
324 | struct bcm_device *dev = list_entry(p, struct bcm_device, list); | |
325 | ||
326 | /* Retrieve saved bcm_device based on parent of the | |
327 | * platform device (saved during device probe) and | |
328 | * parent of tty device used by hci_uart | |
329 | */ | |
330 | if (hu->tty->dev->parent == dev->pdev->dev.parent) { | |
331 | bcm->dev = dev; | |
ae056908 | 332 | hu->init_speed = dev->init_speed; |
74183a1c | 333 | hu->oper_speed = dev->oper_speed; |
b7a622a2 | 334 | #ifdef CONFIG_PM |
118612fb FD |
335 | dev->hu = hu; |
336 | #endif | |
6cc4396c | 337 | bcm_gpio_set_power(bcm->dev, true); |
0395ffc1 FD |
338 | break; |
339 | } | |
340 | } | |
341 | ||
bb3ea16a | 342 | mutex_unlock(&bcm_device_lock); |
95065a61 | 343 | out: |
bdd8818e MH |
344 | return 0; |
345 | } | |
346 | ||
347 | static int bcm_close(struct hci_uart *hu) | |
348 | { | |
349 | struct bcm_data *bcm = hu->priv; | |
6cc4396c | 350 | struct bcm_device *bdev = bcm->dev; |
bdd8818e | 351 | |
65ad07c9 | 352 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
bdd8818e | 353 | |
33cd149e LP |
354 | /* If this is a serdev defined device, only use serdev |
355 | * close primitive and then continue as usual. | |
356 | */ | |
357 | if (hu->serdev) | |
358 | serdev_device_close(hu->serdev); | |
359 | ||
0395ffc1 | 360 | /* Protect bcm->dev against removal of the device or driver */ |
bb3ea16a | 361 | mutex_lock(&bcm_device_lock); |
6cc4396c FD |
362 | if (bcm_device_exists(bdev)) { |
363 | bcm_gpio_set_power(bdev, false); | |
b7a622a2 | 364 | #ifdef CONFIG_PM |
e88ab30d FD |
365 | pm_runtime_disable(&bdev->pdev->dev); |
366 | pm_runtime_set_suspended(&bdev->pdev->dev); | |
367 | ||
6cc4396c FD |
368 | if (device_can_wakeup(&bdev->pdev->dev)) { |
369 | devm_free_irq(&bdev->pdev->dev, bdev->irq, bdev); | |
370 | device_init_wakeup(&bdev->pdev->dev, false); | |
371 | } | |
372 | ||
373 | bdev->hu = NULL; | |
118612fb FD |
374 | #endif |
375 | } | |
bb3ea16a | 376 | mutex_unlock(&bcm_device_lock); |
0395ffc1 | 377 | |
bdd8818e MH |
378 | skb_queue_purge(&bcm->txq); |
379 | kfree_skb(bcm->rx_skb); | |
380 | kfree(bcm); | |
381 | ||
382 | hu->priv = NULL; | |
383 | return 0; | |
384 | } | |
385 | ||
386 | static int bcm_flush(struct hci_uart *hu) | |
387 | { | |
388 | struct bcm_data *bcm = hu->priv; | |
389 | ||
65ad07c9 | 390 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
bdd8818e MH |
391 | |
392 | skb_queue_purge(&bcm->txq); | |
393 | ||
394 | return 0; | |
395 | } | |
396 | ||
397 | static int bcm_setup(struct hci_uart *hu) | |
398 | { | |
6cc4396c | 399 | struct bcm_data *bcm = hu->priv; |
6be09b48 FD |
400 | char fw_name[64]; |
401 | const struct firmware *fw; | |
960ef1d7 | 402 | unsigned int speed; |
6be09b48 FD |
403 | int err; |
404 | ||
65ad07c9 | 405 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
bdd8818e | 406 | |
075e1f5e | 407 | hu->hdev->set_diag = bcm_set_diag; |
bdd8818e MH |
408 | hu->hdev->set_bdaddr = btbcm_set_bdaddr; |
409 | ||
6be09b48 FD |
410 | err = btbcm_initialize(hu->hdev, fw_name, sizeof(fw_name)); |
411 | if (err) | |
412 | return err; | |
413 | ||
414 | err = request_firmware(&fw, fw_name, &hu->hdev->dev); | |
415 | if (err < 0) { | |
65ad07c9 | 416 | bt_dev_info(hu->hdev, "BCM: Patch %s not found", fw_name); |
6be09b48 FD |
417 | return 0; |
418 | } | |
419 | ||
420 | err = btbcm_patchram(hu->hdev, fw); | |
421 | if (err) { | |
65ad07c9 | 422 | bt_dev_info(hu->hdev, "BCM: Patch failed (%d)", err); |
6be09b48 FD |
423 | goto finalize; |
424 | } | |
425 | ||
960ef1d7 FD |
426 | /* Init speed if any */ |
427 | if (hu->init_speed) | |
428 | speed = hu->init_speed; | |
429 | else if (hu->proto->init_speed) | |
430 | speed = hu->proto->init_speed; | |
431 | else | |
432 | speed = 0; | |
433 | ||
434 | if (speed) | |
33cd149e | 435 | host_set_baudrate(hu, speed); |
960ef1d7 FD |
436 | |
437 | /* Operational speed if any */ | |
438 | if (hu->oper_speed) | |
439 | speed = hu->oper_speed; | |
440 | else if (hu->proto->oper_speed) | |
441 | speed = hu->proto->oper_speed; | |
442 | else | |
443 | speed = 0; | |
444 | ||
445 | if (speed) { | |
446 | err = bcm_set_baudrate(hu, speed); | |
61b2fc2b | 447 | if (!err) |
33cd149e | 448 | host_set_baudrate(hu, speed); |
61b2fc2b FD |
449 | } |
450 | ||
6be09b48 FD |
451 | finalize: |
452 | release_firmware(fw); | |
453 | ||
454 | err = btbcm_finalize(hu->hdev); | |
6cc4396c FD |
455 | if (err) |
456 | return err; | |
457 | ||
cdd24a20 | 458 | if (!bcm_request_irq(bcm)) |
6cc4396c | 459 | err = bcm_setup_sleep(hu); |
6be09b48 FD |
460 | |
461 | return err; | |
bdd8818e MH |
462 | } |
463 | ||
94c58132 MH |
464 | #define BCM_RECV_LM_DIAG \ |
465 | .type = BCM_LM_DIAG_PKT, \ | |
466 | .hlen = BCM_LM_DIAG_SIZE, \ | |
467 | .loff = 0, \ | |
468 | .lsize = 0, \ | |
469 | .maxlen = BCM_LM_DIAG_SIZE | |
470 | ||
79b8df93 | 471 | static const struct h4_recv_pkt bcm_recv_pkts[] = { |
94c58132 MH |
472 | { H4_RECV_ACL, .recv = hci_recv_frame }, |
473 | { H4_RECV_SCO, .recv = hci_recv_frame }, | |
474 | { H4_RECV_EVENT, .recv = hci_recv_frame }, | |
475 | { BCM_RECV_LM_DIAG, .recv = hci_recv_diag }, | |
79b8df93 MH |
476 | }; |
477 | ||
bdd8818e MH |
478 | static int bcm_recv(struct hci_uart *hu, const void *data, int count) |
479 | { | |
480 | struct bcm_data *bcm = hu->priv; | |
481 | ||
482 | if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) | |
483 | return -EUNATCH; | |
484 | ||
79b8df93 MH |
485 | bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count, |
486 | bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts)); | |
bdd8818e MH |
487 | if (IS_ERR(bcm->rx_skb)) { |
488 | int err = PTR_ERR(bcm->rx_skb); | |
65ad07c9 | 489 | bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err); |
37134167 | 490 | bcm->rx_skb = NULL; |
bdd8818e | 491 | return err; |
e88ab30d FD |
492 | } else if (!bcm->rx_skb) { |
493 | /* Delay auto-suspend when receiving completed packet */ | |
494 | mutex_lock(&bcm_device_lock); | |
495 | if (bcm->dev && bcm_device_exists(bcm->dev)) { | |
496 | pm_runtime_get(&bcm->dev->pdev->dev); | |
497 | pm_runtime_mark_last_busy(&bcm->dev->pdev->dev); | |
498 | pm_runtime_put_autosuspend(&bcm->dev->pdev->dev); | |
499 | } | |
500 | mutex_unlock(&bcm_device_lock); | |
bdd8818e MH |
501 | } |
502 | ||
503 | return count; | |
504 | } | |
505 | ||
506 | static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb) | |
507 | { | |
508 | struct bcm_data *bcm = hu->priv; | |
509 | ||
65ad07c9 | 510 | bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb); |
bdd8818e MH |
511 | |
512 | /* Prepend skb with frame type */ | |
618e8bc2 | 513 | memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); |
bdd8818e MH |
514 | skb_queue_tail(&bcm->txq, skb); |
515 | ||
516 | return 0; | |
517 | } | |
518 | ||
519 | static struct sk_buff *bcm_dequeue(struct hci_uart *hu) | |
520 | { | |
521 | struct bcm_data *bcm = hu->priv; | |
e88ab30d FD |
522 | struct sk_buff *skb = NULL; |
523 | struct bcm_device *bdev = NULL; | |
524 | ||
525 | mutex_lock(&bcm_device_lock); | |
526 | ||
527 | if (bcm_device_exists(bcm->dev)) { | |
528 | bdev = bcm->dev; | |
529 | pm_runtime_get_sync(&bdev->pdev->dev); | |
530 | /* Shall be resumed here */ | |
531 | } | |
532 | ||
533 | skb = skb_dequeue(&bcm->txq); | |
534 | ||
535 | if (bdev) { | |
536 | pm_runtime_mark_last_busy(&bdev->pdev->dev); | |
537 | pm_runtime_put_autosuspend(&bdev->pdev->dev); | |
538 | } | |
bdd8818e | 539 | |
e88ab30d FD |
540 | mutex_unlock(&bcm_device_lock); |
541 | ||
542 | return skb; | |
bdd8818e MH |
543 | } |
544 | ||
b7a622a2 FD |
545 | #ifdef CONFIG_PM |
546 | static int bcm_suspend_device(struct device *dev) | |
118612fb FD |
547 | { |
548 | struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev)); | |
549 | ||
b7a622a2 | 550 | bt_dev_dbg(bdev, ""); |
917522aa | 551 | |
b7a622a2 | 552 | if (!bdev->is_suspended && bdev->hu) { |
118612fb FD |
553 | hci_uart_set_flow_control(bdev->hu, true); |
554 | ||
b7a622a2 | 555 | /* Once this returns, driver suspends BT via GPIO */ |
118612fb FD |
556 | bdev->is_suspended = true; |
557 | } | |
558 | ||
559 | /* Suspend the device */ | |
560 | if (bdev->device_wakeup) { | |
561 | gpiod_set_value(bdev->device_wakeup, false); | |
65ad07c9 | 562 | bt_dev_dbg(bdev, "suspend, delaying 15 ms"); |
118612fb FD |
563 | mdelay(15); |
564 | } | |
565 | ||
b7a622a2 FD |
566 | return 0; |
567 | } | |
568 | ||
569 | static int bcm_resume_device(struct device *dev) | |
570 | { | |
571 | struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev)); | |
572 | ||
573 | bt_dev_dbg(bdev, ""); | |
574 | ||
575 | if (bdev->device_wakeup) { | |
576 | gpiod_set_value(bdev->device_wakeup, true); | |
577 | bt_dev_dbg(bdev, "resume, delaying 15 ms"); | |
578 | mdelay(15); | |
579 | } | |
580 | ||
581 | /* When this executes, the device has woken up already */ | |
582 | if (bdev->is_suspended && bdev->hu) { | |
583 | bdev->is_suspended = false; | |
584 | ||
585 | hci_uart_set_flow_control(bdev->hu, false); | |
586 | } | |
587 | ||
588 | return 0; | |
589 | } | |
590 | #endif | |
591 | ||
592 | #ifdef CONFIG_PM_SLEEP | |
593 | /* Platform suspend callback */ | |
594 | static int bcm_suspend(struct device *dev) | |
595 | { | |
596 | struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev)); | |
597 | int error; | |
598 | ||
599 | bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended); | |
600 | ||
601 | /* bcm_suspend can be called at any time as long as platform device is | |
602 | * bound, so it should use bcm_device_lock to protect access to hci_uart | |
603 | * and device_wake-up GPIO. | |
604 | */ | |
605 | mutex_lock(&bcm_device_lock); | |
606 | ||
607 | if (!bdev->hu) | |
608 | goto unlock; | |
609 | ||
e88ab30d FD |
610 | if (pm_runtime_active(dev)) |
611 | bcm_suspend_device(dev); | |
b7a622a2 | 612 | |
6cc4396c FD |
613 | if (device_may_wakeup(&bdev->pdev->dev)) { |
614 | error = enable_irq_wake(bdev->irq); | |
615 | if (!error) | |
616 | bt_dev_dbg(bdev, "BCM irq: enabled"); | |
617 | } | |
618 | ||
917522aa | 619 | unlock: |
bb3ea16a | 620 | mutex_unlock(&bcm_device_lock); |
917522aa | 621 | |
118612fb FD |
622 | return 0; |
623 | } | |
624 | ||
625 | /* Platform resume callback */ | |
626 | static int bcm_resume(struct device *dev) | |
627 | { | |
628 | struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev)); | |
629 | ||
65ad07c9 | 630 | bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended); |
118612fb | 631 | |
b7a622a2 FD |
632 | /* bcm_resume can be called at any time as long as platform device is |
633 | * bound, so it should use bcm_device_lock to protect access to hci_uart | |
634 | * and device_wake-up GPIO. | |
635 | */ | |
bb3ea16a | 636 | mutex_lock(&bcm_device_lock); |
917522aa FD |
637 | |
638 | if (!bdev->hu) | |
639 | goto unlock; | |
640 | ||
6cc4396c FD |
641 | if (device_may_wakeup(&bdev->pdev->dev)) { |
642 | disable_irq_wake(bdev->irq); | |
643 | bt_dev_dbg(bdev, "BCM irq: disabled"); | |
644 | } | |
645 | ||
b7a622a2 | 646 | bcm_resume_device(dev); |
118612fb | 647 | |
917522aa | 648 | unlock: |
bb3ea16a | 649 | mutex_unlock(&bcm_device_lock); |
917522aa | 650 | |
e88ab30d FD |
651 | pm_runtime_disable(dev); |
652 | pm_runtime_set_active(dev); | |
653 | pm_runtime_enable(dev); | |
654 | ||
118612fb FD |
655 | return 0; |
656 | } | |
657 | #endif | |
658 | ||
89ab37b4 DD |
659 | static const struct acpi_gpio_params int_last_device_wakeup_gpios = { 0, 0, false }; |
660 | static const struct acpi_gpio_params int_last_shutdown_gpios = { 1, 0, false }; | |
661 | static const struct acpi_gpio_params int_last_host_wakeup_gpios = { 2, 0, false }; | |
662 | ||
663 | static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = { | |
664 | { "device-wakeup-gpios", &int_last_device_wakeup_gpios, 1 }, | |
665 | { "shutdown-gpios", &int_last_shutdown_gpios, 1 }, | |
666 | { "host-wakeup-gpios", &int_last_host_wakeup_gpios, 1 }, | |
667 | { }, | |
668 | }; | |
669 | ||
670 | static const struct acpi_gpio_params int_first_host_wakeup_gpios = { 0, 0, false }; | |
671 | static const struct acpi_gpio_params int_first_device_wakeup_gpios = { 1, 0, false }; | |
672 | static const struct acpi_gpio_params int_first_shutdown_gpios = { 2, 0, false }; | |
673 | ||
674 | static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = { | |
675 | { "device-wakeup-gpios", &int_first_device_wakeup_gpios, 1 }, | |
676 | { "shutdown-gpios", &int_first_shutdown_gpios, 1 }, | |
677 | { "host-wakeup-gpios", &int_first_host_wakeup_gpios, 1 }, | |
0395ffc1 FD |
678 | { }, |
679 | }; | |
680 | ||
50d78bcf | 681 | #ifdef CONFIG_ACPI |
5cebdfea FD |
682 | static u8 acpi_active_low = ACPI_ACTIVE_LOW; |
683 | ||
684 | /* IRQ polarity of some chipsets are not defined correctly in ACPI table. */ | |
685 | static const struct dmi_system_id bcm_wrong_irq_dmi_table[] = { | |
686 | { | |
687 | .ident = "Asus T100TA", | |
688 | .matches = { | |
689 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, | |
690 | "ASUSTeK COMPUTER INC."), | |
691 | DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T100TA"), | |
692 | }, | |
693 | .driver_data = &acpi_active_low, | |
694 | }, | |
c4c285da HG |
695 | { |
696 | .ident = "Asus T100CHI", | |
697 | .matches = { | |
698 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, | |
699 | "ASUSTeK COMPUTER INC."), | |
700 | DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T100CHI"), | |
701 | }, | |
702 | .driver_data = &acpi_active_low, | |
703 | }, | |
5e2bd93b JB |
704 | { /* Handle ThinkPad 8 tablets with BCM2E55 chipset ACPI ID */ |
705 | .ident = "Lenovo ThinkPad 8", | |
706 | .matches = { | |
707 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
708 | DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "ThinkPad 8"), | |
709 | }, | |
710 | .driver_data = &acpi_active_low, | |
711 | }, | |
5cebdfea FD |
712 | { } |
713 | }; | |
714 | ||
ae056908 FD |
715 | static int bcm_resource(struct acpi_resource *ares, void *data) |
716 | { | |
717 | struct bcm_device *dev = data; | |
6cc4396c FD |
718 | struct acpi_resource_extended_irq *irq; |
719 | struct acpi_resource_gpio *gpio; | |
720 | struct acpi_resource_uart_serialbus *sb; | |
721 | ||
722 | switch (ares->type) { | |
723 | case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: | |
724 | irq = &ares->data.extended_irq; | |
725 | dev->irq_polarity = irq->polarity; | |
726 | break; | |
727 | ||
728 | case ACPI_RESOURCE_TYPE_GPIO: | |
729 | gpio = &ares->data.gpio; | |
730 | if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) | |
731 | dev->irq_polarity = gpio->polarity; | |
732 | break; | |
733 | ||
734 | case ACPI_RESOURCE_TYPE_SERIAL_BUS: | |
ae056908 | 735 | sb = &ares->data.uart_serial_bus; |
74183a1c | 736 | if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) { |
ae056908 | 737 | dev->init_speed = sb->default_baud_rate; |
74183a1c MH |
738 | dev->oper_speed = 4000000; |
739 | } | |
6cc4396c FD |
740 | break; |
741 | ||
742 | default: | |
743 | break; | |
ae056908 FD |
744 | } |
745 | ||
746 | /* Always tell the ACPI core to skip this resource */ | |
747 | return 1; | |
748 | } | |
212d7183 | 749 | #endif /* CONFIG_ACPI */ |
ae056908 | 750 | |
212d7183 | 751 | static int bcm_platform_probe(struct bcm_device *dev) |
0395ffc1 FD |
752 | { |
753 | struct platform_device *pdev = dev->pdev; | |
0395ffc1 | 754 | |
0395ffc1 | 755 | dev->name = dev_name(&pdev->dev); |
89ab37b4 | 756 | |
0395ffc1 FD |
757 | dev->clk = devm_clk_get(&pdev->dev, NULL); |
758 | ||
62aaefa7 UKK |
759 | dev->device_wakeup = devm_gpiod_get_optional(&pdev->dev, |
760 | "device-wakeup", | |
761 | GPIOD_OUT_LOW); | |
762 | if (IS_ERR(dev->device_wakeup)) | |
763 | return PTR_ERR(dev->device_wakeup); | |
0395ffc1 | 764 | |
62aaefa7 UKK |
765 | dev->shutdown = devm_gpiod_get_optional(&pdev->dev, "shutdown", |
766 | GPIOD_OUT_LOW); | |
767 | if (IS_ERR(dev->shutdown)) | |
768 | return PTR_ERR(dev->shutdown); | |
0395ffc1 | 769 | |
6cc4396c FD |
770 | /* IRQ can be declared in ACPI table as Interrupt or GpioInt */ |
771 | dev->irq = platform_get_irq(pdev, 0); | |
772 | if (dev->irq <= 0) { | |
773 | struct gpio_desc *gpio; | |
774 | ||
775 | gpio = devm_gpiod_get_optional(&pdev->dev, "host-wakeup", | |
776 | GPIOD_IN); | |
777 | if (IS_ERR(gpio)) | |
778 | return PTR_ERR(gpio); | |
779 | ||
780 | dev->irq = gpiod_to_irq(gpio); | |
781 | } | |
782 | ||
783 | dev_info(&pdev->dev, "BCM irq: %d\n", dev->irq); | |
784 | ||
0395ffc1 FD |
785 | /* Make sure at-least one of the GPIO is defined and that |
786 | * a name is specified for this instance | |
787 | */ | |
788 | if ((!dev->device_wakeup && !dev->shutdown) || !dev->name) { | |
789 | dev_err(&pdev->dev, "invalid platform data\n"); | |
790 | return -EINVAL; | |
791 | } | |
792 | ||
212d7183 AS |
793 | return 0; |
794 | } | |
795 | ||
796 | #ifdef CONFIG_ACPI | |
797 | static int bcm_acpi_probe(struct bcm_device *dev) | |
798 | { | |
799 | struct platform_device *pdev = dev->pdev; | |
800 | LIST_HEAD(resources); | |
801 | const struct dmi_system_id *dmi_id; | |
802 | const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios; | |
803 | const struct acpi_device_id *id; | |
804 | int ret; | |
805 | ||
806 | /* Retrieve GPIO data */ | |
807 | id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev); | |
808 | if (id) | |
809 | gpio_mapping = (const struct acpi_gpio_mapping *) id->driver_data; | |
810 | ||
fda7057f | 811 | ret = devm_acpi_dev_add_driver_gpios(&pdev->dev, gpio_mapping); |
212d7183 AS |
812 | if (ret) |
813 | return ret; | |
814 | ||
815 | ret = bcm_platform_probe(dev); | |
816 | if (ret) | |
817 | return ret; | |
818 | ||
ae056908 | 819 | /* Retrieve UART ACPI info */ |
e98d6d62 JN |
820 | ret = acpi_dev_get_resources(ACPI_COMPANION(&dev->pdev->dev), |
821 | &resources, bcm_resource, dev); | |
5be00284 JN |
822 | if (ret < 0) |
823 | return ret; | |
09dbf1b7 | 824 | acpi_dev_free_resource_list(&resources); |
ae056908 | 825 | |
5cebdfea FD |
826 | dmi_id = dmi_first_match(bcm_wrong_irq_dmi_table); |
827 | if (dmi_id) { | |
828 | bt_dev_warn(dev, "%s: Overwriting IRQ polarity to active low", | |
829 | dmi_id->ident); | |
830 | dev->irq_polarity = *(u8 *)dmi_id->driver_data; | |
831 | } | |
832 | ||
0395ffc1 FD |
833 | return 0; |
834 | } | |
50d78bcf FD |
835 | #else |
836 | static int bcm_acpi_probe(struct bcm_device *dev) | |
837 | { | |
838 | return -EINVAL; | |
839 | } | |
840 | #endif /* CONFIG_ACPI */ | |
0395ffc1 FD |
841 | |
842 | static int bcm_probe(struct platform_device *pdev) | |
843 | { | |
844 | struct bcm_device *dev; | |
0395ffc1 FD |
845 | int ret; |
846 | ||
847 | dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); | |
848 | if (!dev) | |
849 | return -ENOMEM; | |
850 | ||
851 | dev->pdev = pdev; | |
852 | ||
212d7183 AS |
853 | if (has_acpi_companion(&pdev->dev)) |
854 | ret = bcm_acpi_probe(dev); | |
855 | else | |
856 | ret = bcm_platform_probe(dev); | |
4d1c4558 JN |
857 | if (ret) |
858 | return ret; | |
0395ffc1 FD |
859 | |
860 | platform_set_drvdata(pdev, dev); | |
861 | ||
862 | dev_info(&pdev->dev, "%s device registered.\n", dev->name); | |
863 | ||
864 | /* Place this instance on the device list */ | |
bb3ea16a | 865 | mutex_lock(&bcm_device_lock); |
0395ffc1 | 866 | list_add_tail(&dev->list, &bcm_device_list); |
bb3ea16a | 867 | mutex_unlock(&bcm_device_lock); |
0395ffc1 FD |
868 | |
869 | bcm_gpio_set_power(dev, false); | |
870 | ||
871 | return 0; | |
872 | } | |
873 | ||
874 | static int bcm_remove(struct platform_device *pdev) | |
875 | { | |
876 | struct bcm_device *dev = platform_get_drvdata(pdev); | |
877 | ||
bb3ea16a | 878 | mutex_lock(&bcm_device_lock); |
0395ffc1 | 879 | list_del(&dev->list); |
bb3ea16a | 880 | mutex_unlock(&bcm_device_lock); |
0395ffc1 | 881 | |
0395ffc1 FD |
882 | dev_info(&pdev->dev, "%s device unregistered.\n", dev->name); |
883 | ||
884 | return 0; | |
885 | } | |
886 | ||
bdd8818e MH |
887 | static const struct hci_uart_proto bcm_proto = { |
888 | .id = HCI_UART_BCM, | |
143f0a28 | 889 | .name = "Broadcom", |
aee61f7a | 890 | .manufacturer = 15, |
61b2fc2b | 891 | .init_speed = 115200, |
bdd8818e MH |
892 | .open = bcm_open, |
893 | .close = bcm_close, | |
894 | .flush = bcm_flush, | |
895 | .setup = bcm_setup, | |
61b2fc2b | 896 | .set_baudrate = bcm_set_baudrate, |
bdd8818e MH |
897 | .recv = bcm_recv, |
898 | .enqueue = bcm_enqueue, | |
899 | .dequeue = bcm_dequeue, | |
900 | }; | |
901 | ||
0395ffc1 FD |
902 | #ifdef CONFIG_ACPI |
903 | static const struct acpi_device_id bcm_acpi_match[] = { | |
89ab37b4 DD |
904 | { "BCM2E1A", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, |
905 | { "BCM2E39", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
906 | { "BCM2E3A", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
907 | { "BCM2E3D", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
908 | { "BCM2E3F", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
909 | { "BCM2E40", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
910 | { "BCM2E54", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
911 | { "BCM2E55", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
912 | { "BCM2E64", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
913 | { "BCM2E65", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
914 | { "BCM2E67", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
915 | { "BCM2E71", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
916 | { "BCM2E7B", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
917 | { "BCM2E7C", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
918 | { "BCM2E95", (kernel_ulong_t)&acpi_bcm_int_first_gpios }, | |
919 | { "BCM2E96", (kernel_ulong_t)&acpi_bcm_int_first_gpios }, | |
0395ffc1 FD |
920 | { }, |
921 | }; | |
922 | MODULE_DEVICE_TABLE(acpi, bcm_acpi_match); | |
923 | #endif | |
924 | ||
118612fb | 925 | /* Platform suspend and resume callbacks */ |
e88ab30d FD |
926 | static const struct dev_pm_ops bcm_pm_ops = { |
927 | SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume) | |
928 | SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL) | |
929 | }; | |
118612fb | 930 | |
0395ffc1 FD |
931 | static struct platform_driver bcm_driver = { |
932 | .probe = bcm_probe, | |
933 | .remove = bcm_remove, | |
934 | .driver = { | |
935 | .name = "hci_bcm", | |
936 | .acpi_match_table = ACPI_PTR(bcm_acpi_match), | |
118612fb | 937 | .pm = &bcm_pm_ops, |
0395ffc1 FD |
938 | }, |
939 | }; | |
940 | ||
33cd149e LP |
941 | static int bcm_serdev_probe(struct serdev_device *serdev) |
942 | { | |
943 | struct bcm_serdev *bcmdev; | |
944 | u32 speed; | |
945 | int err; | |
946 | ||
947 | bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL); | |
948 | if (!bcmdev) | |
949 | return -ENOMEM; | |
950 | ||
951 | bcmdev->hu.serdev = serdev; | |
952 | serdev_device_set_drvdata(serdev, bcmdev); | |
953 | ||
954 | err = device_property_read_u32(&serdev->dev, "max-speed", &speed); | |
955 | if (!err) | |
956 | bcmdev->hu.oper_speed = speed; | |
957 | ||
958 | return hci_uart_register_device(&bcmdev->hu, &bcm_proto); | |
959 | } | |
960 | ||
961 | static void bcm_serdev_remove(struct serdev_device *serdev) | |
962 | { | |
963 | struct bcm_serdev *bcmdev = serdev_device_get_drvdata(serdev); | |
964 | ||
965 | hci_uart_unregister_device(&bcmdev->hu); | |
966 | } | |
967 | ||
968 | #ifdef CONFIG_OF | |
969 | static const struct of_device_id bcm_bluetooth_of_match[] = { | |
970 | { .compatible = "brcm,bcm43438-bt" }, | |
971 | { }, | |
972 | }; | |
973 | MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match); | |
974 | #endif | |
975 | ||
976 | static struct serdev_device_driver bcm_serdev_driver = { | |
977 | .probe = bcm_serdev_probe, | |
978 | .remove = bcm_serdev_remove, | |
979 | .driver = { | |
980 | .name = "hci_uart_bcm", | |
981 | .of_match_table = of_match_ptr(bcm_bluetooth_of_match), | |
982 | }, | |
983 | }; | |
984 | ||
bdd8818e MH |
985 | int __init bcm_init(void) |
986 | { | |
33cd149e LP |
987 | /* For now, we need to keep both platform device |
988 | * driver (ACPI generated) and serdev driver (DT). | |
989 | */ | |
0395ffc1 | 990 | platform_driver_register(&bcm_driver); |
33cd149e | 991 | serdev_device_driver_register(&bcm_serdev_driver); |
0395ffc1 | 992 | |
bdd8818e MH |
993 | return hci_uart_register_proto(&bcm_proto); |
994 | } | |
995 | ||
996 | int __exit bcm_deinit(void) | |
997 | { | |
0395ffc1 | 998 | platform_driver_unregister(&bcm_driver); |
33cd149e | 999 | serdev_device_driver_unregister(&bcm_serdev_driver); |
0395ffc1 | 1000 | |
bdd8818e MH |
1001 | return hci_uart_unregister_proto(&bcm_proto); |
1002 | } |