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) | |
730ce397 | 149 | clk_prepare_enable(dev->clk); |
0395ffc1 | 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) | |
730ce397 | 155 | clk_disable_unprepare(dev->clk); |
0395ffc1 FD |
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 | 264 | |
634fef61 JB |
265 | skb_put_u8(skb, BCM_LM_DIAG_PKT); |
266 | skb_put_u8(skb, 0xf0); | |
267 | skb_put_u8(skb, enable); | |
075e1f5e MH |
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 | |
95065a61 JH |
290 | if (!hu->tty->dev) |
291 | goto out; | |
292 | ||
bb3ea16a | 293 | mutex_lock(&bcm_device_lock); |
0395ffc1 FD |
294 | list_for_each(p, &bcm_device_list) { |
295 | struct bcm_device *dev = list_entry(p, struct bcm_device, list); | |
296 | ||
297 | /* Retrieve saved bcm_device based on parent of the | |
298 | * platform device (saved during device probe) and | |
299 | * parent of tty device used by hci_uart | |
300 | */ | |
301 | if (hu->tty->dev->parent == dev->pdev->dev.parent) { | |
302 | bcm->dev = dev; | |
ae056908 | 303 | hu->init_speed = dev->init_speed; |
b7a622a2 | 304 | #ifdef CONFIG_PM |
118612fb FD |
305 | dev->hu = hu; |
306 | #endif | |
6cc4396c | 307 | bcm_gpio_set_power(bcm->dev, true); |
0395ffc1 FD |
308 | break; |
309 | } | |
310 | } | |
311 | ||
bb3ea16a | 312 | mutex_unlock(&bcm_device_lock); |
95065a61 | 313 | out: |
bdd8818e MH |
314 | return 0; |
315 | } | |
316 | ||
317 | static int bcm_close(struct hci_uart *hu) | |
318 | { | |
319 | struct bcm_data *bcm = hu->priv; | |
6cc4396c | 320 | struct bcm_device *bdev = bcm->dev; |
bdd8818e | 321 | |
65ad07c9 | 322 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
bdd8818e | 323 | |
0395ffc1 | 324 | /* Protect bcm->dev against removal of the device or driver */ |
bb3ea16a | 325 | mutex_lock(&bcm_device_lock); |
6cc4396c FD |
326 | if (bcm_device_exists(bdev)) { |
327 | bcm_gpio_set_power(bdev, false); | |
b7a622a2 | 328 | #ifdef CONFIG_PM |
e88ab30d FD |
329 | pm_runtime_disable(&bdev->pdev->dev); |
330 | pm_runtime_set_suspended(&bdev->pdev->dev); | |
331 | ||
6cc4396c FD |
332 | if (device_can_wakeup(&bdev->pdev->dev)) { |
333 | devm_free_irq(&bdev->pdev->dev, bdev->irq, bdev); | |
334 | device_init_wakeup(&bdev->pdev->dev, false); | |
335 | } | |
336 | ||
337 | bdev->hu = NULL; | |
118612fb FD |
338 | #endif |
339 | } | |
bb3ea16a | 340 | mutex_unlock(&bcm_device_lock); |
0395ffc1 | 341 | |
bdd8818e MH |
342 | skb_queue_purge(&bcm->txq); |
343 | kfree_skb(bcm->rx_skb); | |
344 | kfree(bcm); | |
345 | ||
346 | hu->priv = NULL; | |
347 | return 0; | |
348 | } | |
349 | ||
350 | static int bcm_flush(struct hci_uart *hu) | |
351 | { | |
352 | struct bcm_data *bcm = hu->priv; | |
353 | ||
65ad07c9 | 354 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
bdd8818e MH |
355 | |
356 | skb_queue_purge(&bcm->txq); | |
357 | ||
358 | return 0; | |
359 | } | |
360 | ||
361 | static int bcm_setup(struct hci_uart *hu) | |
362 | { | |
6cc4396c | 363 | struct bcm_data *bcm = hu->priv; |
6be09b48 FD |
364 | char fw_name[64]; |
365 | const struct firmware *fw; | |
960ef1d7 | 366 | unsigned int speed; |
6be09b48 FD |
367 | int err; |
368 | ||
65ad07c9 | 369 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
bdd8818e | 370 | |
075e1f5e | 371 | hu->hdev->set_diag = bcm_set_diag; |
bdd8818e MH |
372 | hu->hdev->set_bdaddr = btbcm_set_bdaddr; |
373 | ||
6be09b48 FD |
374 | err = btbcm_initialize(hu->hdev, fw_name, sizeof(fw_name)); |
375 | if (err) | |
376 | return err; | |
377 | ||
378 | err = request_firmware(&fw, fw_name, &hu->hdev->dev); | |
379 | if (err < 0) { | |
65ad07c9 | 380 | bt_dev_info(hu->hdev, "BCM: Patch %s not found", fw_name); |
6be09b48 FD |
381 | return 0; |
382 | } | |
383 | ||
384 | err = btbcm_patchram(hu->hdev, fw); | |
385 | if (err) { | |
65ad07c9 | 386 | bt_dev_info(hu->hdev, "BCM: Patch failed (%d)", err); |
6be09b48 FD |
387 | goto finalize; |
388 | } | |
389 | ||
960ef1d7 FD |
390 | /* Init speed if any */ |
391 | if (hu->init_speed) | |
392 | speed = hu->init_speed; | |
393 | else if (hu->proto->init_speed) | |
394 | speed = hu->proto->init_speed; | |
395 | else | |
396 | speed = 0; | |
397 | ||
398 | if (speed) | |
399 | hci_uart_set_baudrate(hu, speed); | |
400 | ||
401 | /* Operational speed if any */ | |
402 | if (hu->oper_speed) | |
403 | speed = hu->oper_speed; | |
404 | else if (hu->proto->oper_speed) | |
405 | speed = hu->proto->oper_speed; | |
406 | else | |
407 | speed = 0; | |
408 | ||
409 | if (speed) { | |
410 | err = bcm_set_baudrate(hu, speed); | |
61b2fc2b | 411 | if (!err) |
960ef1d7 | 412 | hci_uart_set_baudrate(hu, speed); |
61b2fc2b FD |
413 | } |
414 | ||
6be09b48 FD |
415 | finalize: |
416 | release_firmware(fw); | |
417 | ||
418 | err = btbcm_finalize(hu->hdev); | |
6cc4396c FD |
419 | if (err) |
420 | return err; | |
421 | ||
cdd24a20 | 422 | if (!bcm_request_irq(bcm)) |
6cc4396c | 423 | err = bcm_setup_sleep(hu); |
6be09b48 FD |
424 | |
425 | return err; | |
bdd8818e MH |
426 | } |
427 | ||
94c58132 MH |
428 | #define BCM_RECV_LM_DIAG \ |
429 | .type = BCM_LM_DIAG_PKT, \ | |
430 | .hlen = BCM_LM_DIAG_SIZE, \ | |
431 | .loff = 0, \ | |
432 | .lsize = 0, \ | |
433 | .maxlen = BCM_LM_DIAG_SIZE | |
434 | ||
79b8df93 | 435 | static const struct h4_recv_pkt bcm_recv_pkts[] = { |
94c58132 MH |
436 | { H4_RECV_ACL, .recv = hci_recv_frame }, |
437 | { H4_RECV_SCO, .recv = hci_recv_frame }, | |
438 | { H4_RECV_EVENT, .recv = hci_recv_frame }, | |
439 | { BCM_RECV_LM_DIAG, .recv = hci_recv_diag }, | |
79b8df93 MH |
440 | }; |
441 | ||
bdd8818e MH |
442 | static int bcm_recv(struct hci_uart *hu, const void *data, int count) |
443 | { | |
444 | struct bcm_data *bcm = hu->priv; | |
445 | ||
446 | if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) | |
447 | return -EUNATCH; | |
448 | ||
79b8df93 MH |
449 | bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count, |
450 | bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts)); | |
bdd8818e MH |
451 | if (IS_ERR(bcm->rx_skb)) { |
452 | int err = PTR_ERR(bcm->rx_skb); | |
65ad07c9 | 453 | bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err); |
37134167 | 454 | bcm->rx_skb = NULL; |
bdd8818e | 455 | return err; |
e88ab30d FD |
456 | } else if (!bcm->rx_skb) { |
457 | /* Delay auto-suspend when receiving completed packet */ | |
458 | mutex_lock(&bcm_device_lock); | |
459 | if (bcm->dev && bcm_device_exists(bcm->dev)) { | |
460 | pm_runtime_get(&bcm->dev->pdev->dev); | |
461 | pm_runtime_mark_last_busy(&bcm->dev->pdev->dev); | |
462 | pm_runtime_put_autosuspend(&bcm->dev->pdev->dev); | |
463 | } | |
464 | mutex_unlock(&bcm_device_lock); | |
bdd8818e MH |
465 | } |
466 | ||
467 | return count; | |
468 | } | |
469 | ||
470 | static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb) | |
471 | { | |
472 | struct bcm_data *bcm = hu->priv; | |
473 | ||
65ad07c9 | 474 | bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb); |
bdd8818e MH |
475 | |
476 | /* Prepend skb with frame type */ | |
618e8bc2 | 477 | memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); |
bdd8818e MH |
478 | skb_queue_tail(&bcm->txq, skb); |
479 | ||
480 | return 0; | |
481 | } | |
482 | ||
483 | static struct sk_buff *bcm_dequeue(struct hci_uart *hu) | |
484 | { | |
485 | struct bcm_data *bcm = hu->priv; | |
e88ab30d FD |
486 | struct sk_buff *skb = NULL; |
487 | struct bcm_device *bdev = NULL; | |
488 | ||
489 | mutex_lock(&bcm_device_lock); | |
490 | ||
491 | if (bcm_device_exists(bcm->dev)) { | |
492 | bdev = bcm->dev; | |
493 | pm_runtime_get_sync(&bdev->pdev->dev); | |
494 | /* Shall be resumed here */ | |
495 | } | |
496 | ||
497 | skb = skb_dequeue(&bcm->txq); | |
498 | ||
499 | if (bdev) { | |
500 | pm_runtime_mark_last_busy(&bdev->pdev->dev); | |
501 | pm_runtime_put_autosuspend(&bdev->pdev->dev); | |
502 | } | |
bdd8818e | 503 | |
e88ab30d FD |
504 | mutex_unlock(&bcm_device_lock); |
505 | ||
506 | return skb; | |
bdd8818e MH |
507 | } |
508 | ||
b7a622a2 FD |
509 | #ifdef CONFIG_PM |
510 | static int bcm_suspend_device(struct device *dev) | |
118612fb FD |
511 | { |
512 | struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev)); | |
513 | ||
b7a622a2 | 514 | bt_dev_dbg(bdev, ""); |
917522aa | 515 | |
b7a622a2 | 516 | if (!bdev->is_suspended && bdev->hu) { |
118612fb FD |
517 | hci_uart_set_flow_control(bdev->hu, true); |
518 | ||
b7a622a2 | 519 | /* Once this returns, driver suspends BT via GPIO */ |
118612fb FD |
520 | bdev->is_suspended = true; |
521 | } | |
522 | ||
523 | /* Suspend the device */ | |
524 | if (bdev->device_wakeup) { | |
525 | gpiod_set_value(bdev->device_wakeup, false); | |
65ad07c9 | 526 | bt_dev_dbg(bdev, "suspend, delaying 15 ms"); |
118612fb FD |
527 | mdelay(15); |
528 | } | |
529 | ||
b7a622a2 FD |
530 | return 0; |
531 | } | |
532 | ||
533 | static int bcm_resume_device(struct device *dev) | |
534 | { | |
535 | struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev)); | |
536 | ||
537 | bt_dev_dbg(bdev, ""); | |
538 | ||
539 | if (bdev->device_wakeup) { | |
540 | gpiod_set_value(bdev->device_wakeup, true); | |
541 | bt_dev_dbg(bdev, "resume, delaying 15 ms"); | |
542 | mdelay(15); | |
543 | } | |
544 | ||
545 | /* When this executes, the device has woken up already */ | |
546 | if (bdev->is_suspended && bdev->hu) { | |
547 | bdev->is_suspended = false; | |
548 | ||
549 | hci_uart_set_flow_control(bdev->hu, false); | |
550 | } | |
551 | ||
552 | return 0; | |
553 | } | |
554 | #endif | |
555 | ||
556 | #ifdef CONFIG_PM_SLEEP | |
557 | /* Platform suspend callback */ | |
558 | static int bcm_suspend(struct device *dev) | |
559 | { | |
560 | struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev)); | |
561 | int error; | |
562 | ||
563 | bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended); | |
564 | ||
565 | /* bcm_suspend can be called at any time as long as platform device is | |
566 | * bound, so it should use bcm_device_lock to protect access to hci_uart | |
567 | * and device_wake-up GPIO. | |
568 | */ | |
569 | mutex_lock(&bcm_device_lock); | |
570 | ||
571 | if (!bdev->hu) | |
572 | goto unlock; | |
573 | ||
e88ab30d FD |
574 | if (pm_runtime_active(dev)) |
575 | bcm_suspend_device(dev); | |
b7a622a2 | 576 | |
6cc4396c FD |
577 | if (device_may_wakeup(&bdev->pdev->dev)) { |
578 | error = enable_irq_wake(bdev->irq); | |
579 | if (!error) | |
580 | bt_dev_dbg(bdev, "BCM irq: enabled"); | |
581 | } | |
582 | ||
917522aa | 583 | unlock: |
bb3ea16a | 584 | mutex_unlock(&bcm_device_lock); |
917522aa | 585 | |
118612fb FD |
586 | return 0; |
587 | } | |
588 | ||
589 | /* Platform resume callback */ | |
590 | static int bcm_resume(struct device *dev) | |
591 | { | |
592 | struct bcm_device *bdev = platform_get_drvdata(to_platform_device(dev)); | |
593 | ||
65ad07c9 | 594 | bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended); |
118612fb | 595 | |
b7a622a2 FD |
596 | /* bcm_resume can be called at any time as long as platform device is |
597 | * bound, so it should use bcm_device_lock to protect access to hci_uart | |
598 | * and device_wake-up GPIO. | |
599 | */ | |
bb3ea16a | 600 | mutex_lock(&bcm_device_lock); |
917522aa FD |
601 | |
602 | if (!bdev->hu) | |
603 | goto unlock; | |
604 | ||
6cc4396c FD |
605 | if (device_may_wakeup(&bdev->pdev->dev)) { |
606 | disable_irq_wake(bdev->irq); | |
607 | bt_dev_dbg(bdev, "BCM irq: disabled"); | |
608 | } | |
609 | ||
b7a622a2 | 610 | bcm_resume_device(dev); |
118612fb | 611 | |
917522aa | 612 | unlock: |
bb3ea16a | 613 | mutex_unlock(&bcm_device_lock); |
917522aa | 614 | |
e88ab30d FD |
615 | pm_runtime_disable(dev); |
616 | pm_runtime_set_active(dev); | |
617 | pm_runtime_enable(dev); | |
618 | ||
118612fb FD |
619 | return 0; |
620 | } | |
621 | #endif | |
622 | ||
89ab37b4 DD |
623 | static const struct acpi_gpio_params int_last_device_wakeup_gpios = { 0, 0, false }; |
624 | static const struct acpi_gpio_params int_last_shutdown_gpios = { 1, 0, false }; | |
625 | static const struct acpi_gpio_params int_last_host_wakeup_gpios = { 2, 0, false }; | |
626 | ||
627 | static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = { | |
628 | { "device-wakeup-gpios", &int_last_device_wakeup_gpios, 1 }, | |
629 | { "shutdown-gpios", &int_last_shutdown_gpios, 1 }, | |
630 | { "host-wakeup-gpios", &int_last_host_wakeup_gpios, 1 }, | |
631 | { }, | |
632 | }; | |
633 | ||
634 | static const struct acpi_gpio_params int_first_host_wakeup_gpios = { 0, 0, false }; | |
635 | static const struct acpi_gpio_params int_first_device_wakeup_gpios = { 1, 0, false }; | |
636 | static const struct acpi_gpio_params int_first_shutdown_gpios = { 2, 0, false }; | |
637 | ||
638 | static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = { | |
639 | { "device-wakeup-gpios", &int_first_device_wakeup_gpios, 1 }, | |
640 | { "shutdown-gpios", &int_first_shutdown_gpios, 1 }, | |
641 | { "host-wakeup-gpios", &int_first_host_wakeup_gpios, 1 }, | |
0395ffc1 FD |
642 | { }, |
643 | }; | |
644 | ||
50d78bcf | 645 | #ifdef CONFIG_ACPI |
5cebdfea FD |
646 | static u8 acpi_active_low = ACPI_ACTIVE_LOW; |
647 | ||
648 | /* IRQ polarity of some chipsets are not defined correctly in ACPI table. */ | |
649 | static const struct dmi_system_id bcm_wrong_irq_dmi_table[] = { | |
650 | { | |
651 | .ident = "Asus T100TA", | |
652 | .matches = { | |
653 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, | |
654 | "ASUSTeK COMPUTER INC."), | |
655 | DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T100TA"), | |
656 | }, | |
657 | .driver_data = &acpi_active_low, | |
658 | }, | |
c4c285da HG |
659 | { |
660 | .ident = "Asus T100CHI", | |
661 | .matches = { | |
662 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, | |
663 | "ASUSTeK COMPUTER INC."), | |
664 | DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T100CHI"), | |
665 | }, | |
666 | .driver_data = &acpi_active_low, | |
667 | }, | |
5e2bd93b JB |
668 | { /* Handle ThinkPad 8 tablets with BCM2E55 chipset ACPI ID */ |
669 | .ident = "Lenovo ThinkPad 8", | |
670 | .matches = { | |
671 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
672 | DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "ThinkPad 8"), | |
673 | }, | |
674 | .driver_data = &acpi_active_low, | |
675 | }, | |
5cebdfea FD |
676 | { } |
677 | }; | |
678 | ||
ae056908 FD |
679 | static int bcm_resource(struct acpi_resource *ares, void *data) |
680 | { | |
681 | struct bcm_device *dev = data; | |
6cc4396c FD |
682 | struct acpi_resource_extended_irq *irq; |
683 | struct acpi_resource_gpio *gpio; | |
684 | struct acpi_resource_uart_serialbus *sb; | |
685 | ||
686 | switch (ares->type) { | |
687 | case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: | |
688 | irq = &ares->data.extended_irq; | |
689 | dev->irq_polarity = irq->polarity; | |
690 | break; | |
691 | ||
692 | case ACPI_RESOURCE_TYPE_GPIO: | |
693 | gpio = &ares->data.gpio; | |
694 | if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) | |
695 | dev->irq_polarity = gpio->polarity; | |
696 | break; | |
697 | ||
698 | case ACPI_RESOURCE_TYPE_SERIAL_BUS: | |
ae056908 FD |
699 | sb = &ares->data.uart_serial_bus; |
700 | if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) | |
701 | dev->init_speed = sb->default_baud_rate; | |
6cc4396c FD |
702 | break; |
703 | ||
704 | default: | |
705 | break; | |
ae056908 FD |
706 | } |
707 | ||
708 | /* Always tell the ACPI core to skip this resource */ | |
709 | return 1; | |
710 | } | |
212d7183 | 711 | #endif /* CONFIG_ACPI */ |
ae056908 | 712 | |
212d7183 | 713 | static int bcm_platform_probe(struct bcm_device *dev) |
0395ffc1 FD |
714 | { |
715 | struct platform_device *pdev = dev->pdev; | |
0395ffc1 | 716 | |
0395ffc1 | 717 | dev->name = dev_name(&pdev->dev); |
89ab37b4 | 718 | |
0395ffc1 FD |
719 | dev->clk = devm_clk_get(&pdev->dev, NULL); |
720 | ||
62aaefa7 UKK |
721 | dev->device_wakeup = devm_gpiod_get_optional(&pdev->dev, |
722 | "device-wakeup", | |
723 | GPIOD_OUT_LOW); | |
724 | if (IS_ERR(dev->device_wakeup)) | |
725 | return PTR_ERR(dev->device_wakeup); | |
0395ffc1 | 726 | |
62aaefa7 UKK |
727 | dev->shutdown = devm_gpiod_get_optional(&pdev->dev, "shutdown", |
728 | GPIOD_OUT_LOW); | |
729 | if (IS_ERR(dev->shutdown)) | |
730 | return PTR_ERR(dev->shutdown); | |
0395ffc1 | 731 | |
6cc4396c FD |
732 | /* IRQ can be declared in ACPI table as Interrupt or GpioInt */ |
733 | dev->irq = platform_get_irq(pdev, 0); | |
734 | if (dev->irq <= 0) { | |
735 | struct gpio_desc *gpio; | |
736 | ||
737 | gpio = devm_gpiod_get_optional(&pdev->dev, "host-wakeup", | |
738 | GPIOD_IN); | |
739 | if (IS_ERR(gpio)) | |
740 | return PTR_ERR(gpio); | |
741 | ||
742 | dev->irq = gpiod_to_irq(gpio); | |
743 | } | |
744 | ||
745 | dev_info(&pdev->dev, "BCM irq: %d\n", dev->irq); | |
746 | ||
0395ffc1 FD |
747 | /* Make sure at-least one of the GPIO is defined and that |
748 | * a name is specified for this instance | |
749 | */ | |
750 | if ((!dev->device_wakeup && !dev->shutdown) || !dev->name) { | |
751 | dev_err(&pdev->dev, "invalid platform data\n"); | |
752 | return -EINVAL; | |
753 | } | |
754 | ||
212d7183 AS |
755 | return 0; |
756 | } | |
757 | ||
758 | #ifdef CONFIG_ACPI | |
759 | static int bcm_acpi_probe(struct bcm_device *dev) | |
760 | { | |
761 | struct platform_device *pdev = dev->pdev; | |
762 | LIST_HEAD(resources); | |
763 | const struct dmi_system_id *dmi_id; | |
764 | const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios; | |
765 | const struct acpi_device_id *id; | |
766 | int ret; | |
767 | ||
768 | /* Retrieve GPIO data */ | |
769 | id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev); | |
770 | if (id) | |
771 | gpio_mapping = (const struct acpi_gpio_mapping *) id->driver_data; | |
772 | ||
fda7057f | 773 | ret = devm_acpi_dev_add_driver_gpios(&pdev->dev, gpio_mapping); |
212d7183 AS |
774 | if (ret) |
775 | return ret; | |
776 | ||
777 | ret = bcm_platform_probe(dev); | |
778 | if (ret) | |
779 | return ret; | |
780 | ||
ae056908 | 781 | /* Retrieve UART ACPI info */ |
e98d6d62 JN |
782 | ret = acpi_dev_get_resources(ACPI_COMPANION(&dev->pdev->dev), |
783 | &resources, bcm_resource, dev); | |
5be00284 JN |
784 | if (ret < 0) |
785 | return ret; | |
09dbf1b7 | 786 | acpi_dev_free_resource_list(&resources); |
ae056908 | 787 | |
5cebdfea FD |
788 | dmi_id = dmi_first_match(bcm_wrong_irq_dmi_table); |
789 | if (dmi_id) { | |
790 | bt_dev_warn(dev, "%s: Overwriting IRQ polarity to active low", | |
791 | dmi_id->ident); | |
792 | dev->irq_polarity = *(u8 *)dmi_id->driver_data; | |
793 | } | |
794 | ||
0395ffc1 FD |
795 | return 0; |
796 | } | |
50d78bcf FD |
797 | #else |
798 | static int bcm_acpi_probe(struct bcm_device *dev) | |
799 | { | |
800 | return -EINVAL; | |
801 | } | |
802 | #endif /* CONFIG_ACPI */ | |
0395ffc1 FD |
803 | |
804 | static int bcm_probe(struct platform_device *pdev) | |
805 | { | |
806 | struct bcm_device *dev; | |
0395ffc1 FD |
807 | int ret; |
808 | ||
809 | dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); | |
810 | if (!dev) | |
811 | return -ENOMEM; | |
812 | ||
813 | dev->pdev = pdev; | |
814 | ||
212d7183 AS |
815 | if (has_acpi_companion(&pdev->dev)) |
816 | ret = bcm_acpi_probe(dev); | |
817 | else | |
818 | ret = bcm_platform_probe(dev); | |
4d1c4558 JN |
819 | if (ret) |
820 | return ret; | |
0395ffc1 FD |
821 | |
822 | platform_set_drvdata(pdev, dev); | |
823 | ||
824 | dev_info(&pdev->dev, "%s device registered.\n", dev->name); | |
825 | ||
826 | /* Place this instance on the device list */ | |
bb3ea16a | 827 | mutex_lock(&bcm_device_lock); |
0395ffc1 | 828 | list_add_tail(&dev->list, &bcm_device_list); |
bb3ea16a | 829 | mutex_unlock(&bcm_device_lock); |
0395ffc1 FD |
830 | |
831 | bcm_gpio_set_power(dev, false); | |
832 | ||
833 | return 0; | |
834 | } | |
835 | ||
836 | static int bcm_remove(struct platform_device *pdev) | |
837 | { | |
838 | struct bcm_device *dev = platform_get_drvdata(pdev); | |
839 | ||
bb3ea16a | 840 | mutex_lock(&bcm_device_lock); |
0395ffc1 | 841 | list_del(&dev->list); |
bb3ea16a | 842 | mutex_unlock(&bcm_device_lock); |
0395ffc1 | 843 | |
0395ffc1 FD |
844 | dev_info(&pdev->dev, "%s device unregistered.\n", dev->name); |
845 | ||
846 | return 0; | |
847 | } | |
848 | ||
bdd8818e MH |
849 | static const struct hci_uart_proto bcm_proto = { |
850 | .id = HCI_UART_BCM, | |
143f0a28 | 851 | .name = "Broadcom", |
aee61f7a | 852 | .manufacturer = 15, |
61b2fc2b FD |
853 | .init_speed = 115200, |
854 | .oper_speed = 4000000, | |
bdd8818e MH |
855 | .open = bcm_open, |
856 | .close = bcm_close, | |
857 | .flush = bcm_flush, | |
858 | .setup = bcm_setup, | |
61b2fc2b | 859 | .set_baudrate = bcm_set_baudrate, |
bdd8818e MH |
860 | .recv = bcm_recv, |
861 | .enqueue = bcm_enqueue, | |
862 | .dequeue = bcm_dequeue, | |
863 | }; | |
864 | ||
0395ffc1 FD |
865 | #ifdef CONFIG_ACPI |
866 | static const struct acpi_device_id bcm_acpi_match[] = { | |
89ab37b4 DD |
867 | { "BCM2E1A", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, |
868 | { "BCM2E39", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
869 | { "BCM2E3A", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
870 | { "BCM2E3D", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
871 | { "BCM2E3F", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
872 | { "BCM2E40", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
873 | { "BCM2E54", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
874 | { "BCM2E55", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
875 | { "BCM2E64", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
876 | { "BCM2E65", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
877 | { "BCM2E67", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
878 | { "BCM2E71", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
879 | { "BCM2E7B", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
880 | { "BCM2E7C", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
881 | { "BCM2E95", (kernel_ulong_t)&acpi_bcm_int_first_gpios }, | |
882 | { "BCM2E96", (kernel_ulong_t)&acpi_bcm_int_first_gpios }, | |
0395ffc1 FD |
883 | { }, |
884 | }; | |
885 | MODULE_DEVICE_TABLE(acpi, bcm_acpi_match); | |
886 | #endif | |
887 | ||
118612fb | 888 | /* Platform suspend and resume callbacks */ |
e88ab30d FD |
889 | static const struct dev_pm_ops bcm_pm_ops = { |
890 | SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume) | |
891 | SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL) | |
892 | }; | |
118612fb | 893 | |
0395ffc1 FD |
894 | static struct platform_driver bcm_driver = { |
895 | .probe = bcm_probe, | |
896 | .remove = bcm_remove, | |
897 | .driver = { | |
898 | .name = "hci_bcm", | |
899 | .acpi_match_table = ACPI_PTR(bcm_acpi_match), | |
118612fb | 900 | .pm = &bcm_pm_ops, |
0395ffc1 FD |
901 | }, |
902 | }; | |
903 | ||
bdd8818e MH |
904 | int __init bcm_init(void) |
905 | { | |
0395ffc1 FD |
906 | platform_driver_register(&bcm_driver); |
907 | ||
bdd8818e MH |
908 | return hci_uart_register_proto(&bcm_proto); |
909 | } | |
910 | ||
911 | int __exit bcm_deinit(void) | |
912 | { | |
0395ffc1 FD |
913 | platform_driver_unregister(&bcm_driver); |
914 | ||
bdd8818e MH |
915 | return hci_uart_unregister_proto(&bcm_proto); |
916 | } |