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> | |
4c33162c | 32 | #include <linux/platform_data/x86/apple.h> |
0395ffc1 FD |
33 | #include <linux/platform_device.h> |
34 | #include <linux/clk.h> | |
35 | #include <linux/gpio/consumer.h> | |
36 | #include <linux/tty.h> | |
6cc4396c | 37 | #include <linux/interrupt.h> |
5cebdfea | 38 | #include <linux/dmi.h> |
e88ab30d | 39 | #include <linux/pm_runtime.h> |
33cd149e | 40 | #include <linux/serdev.h> |
e9a2dd26 MH |
41 | |
42 | #include <net/bluetooth/bluetooth.h> | |
43 | #include <net/bluetooth/hci_core.h> | |
44 | ||
bdd8818e | 45 | #include "btbcm.h" |
e9a2dd26 | 46 | #include "hci_uart.h" |
bdd8818e | 47 | |
01d5e44a MH |
48 | #define BCM_NULL_PKT 0x00 |
49 | #define BCM_NULL_SIZE 0 | |
50 | ||
94c58132 MH |
51 | #define BCM_LM_DIAG_PKT 0x07 |
52 | #define BCM_LM_DIAG_SIZE 63 | |
53 | ||
e88ab30d FD |
54 | #define BCM_AUTOSUSPEND_DELAY 5000 /* default autosleep delay */ |
55 | ||
b7c2abac LW |
56 | /** |
57 | * struct bcm_device - device driver resources | |
58 | * @serdev_hu: HCI UART controller struct | |
59 | * @list: bcm_device_list node | |
60 | * @dev: physical UART slave | |
61 | * @name: device name logged by bt_dev_*() functions | |
62 | * @device_wakeup: BT_WAKE pin, | |
63 | * assert = Bluetooth device must wake up or remain awake, | |
64 | * deassert = Bluetooth device may sleep when sleep criteria are met | |
65 | * @shutdown: BT_REG_ON pin, | |
66 | * power up or power down Bluetooth device internal regulators | |
8353b4a6 | 67 | * @set_device_wakeup: callback to toggle BT_WAKE pin |
4c33162c | 68 | * either by accessing @device_wakeup or by calling @btlp |
8353b4a6 | 69 | * @set_shutdown: callback to toggle BT_REG_ON pin |
4c33162c LW |
70 | * either by accessing @shutdown or by calling @btpu/@btpd |
71 | * @btlp: Apple ACPI method to toggle BT_WAKE pin ("Bluetooth Low Power") | |
72 | * @btpu: Apple ACPI method to drive BT_REG_ON pin high ("Bluetooth Power Up") | |
73 | * @btpd: Apple ACPI method to drive BT_REG_ON pin low ("Bluetooth Power Down") | |
b7c2abac LW |
74 | * @clk: clock used by Bluetooth device |
75 | * @clk_enabled: whether @clk is prepared and enabled | |
76 | * @init_speed: default baudrate of Bluetooth device; | |
77 | * the host UART is initially set to this baudrate so that | |
78 | * it can configure the Bluetooth device for @oper_speed | |
79 | * @oper_speed: preferred baudrate of Bluetooth device; | |
80 | * set to 0 if @init_speed is already the preferred baudrate | |
81 | * @irq: interrupt triggered by HOST_WAKE_BT pin | |
82 | * @irq_active_low: whether @irq is active low | |
83 | * @hu: pointer to HCI UART controller struct, | |
84 | * used to disable flow control during runtime suspend and system sleep | |
85 | * @is_suspended: whether flow control is currently disabled | |
86 | */ | |
0395ffc1 | 87 | struct bcm_device { |
8a920568 HG |
88 | /* Must be the first member, hci_serdev.c expects this. */ |
89 | struct hci_uart serdev_hu; | |
0395ffc1 FD |
90 | struct list_head list; |
91 | ||
c0d3ce58 | 92 | struct device *dev; |
0395ffc1 FD |
93 | |
94 | const char *name; | |
95 | struct gpio_desc *device_wakeup; | |
96 | struct gpio_desc *shutdown; | |
8353b4a6 LW |
97 | int (*set_device_wakeup)(struct bcm_device *, bool); |
98 | int (*set_shutdown)(struct bcm_device *, bool); | |
4c33162c LW |
99 | #ifdef CONFIG_ACPI |
100 | acpi_handle btlp, btpu, btpd; | |
101 | #endif | |
0395ffc1 FD |
102 | |
103 | struct clk *clk; | |
104 | bool clk_enabled; | |
ae056908 FD |
105 | |
106 | u32 init_speed; | |
74183a1c | 107 | u32 oper_speed; |
6cc4396c | 108 | int irq; |
227630cc | 109 | bool irq_active_low; |
118612fb | 110 | |
b7a622a2 | 111 | #ifdef CONFIG_PM |
118612fb | 112 | struct hci_uart *hu; |
b7c2abac | 113 | bool is_suspended; |
118612fb | 114 | #endif |
0395ffc1 FD |
115 | }; |
116 | ||
33cd149e | 117 | /* generic bcm uart resources */ |
bdd8818e | 118 | struct bcm_data { |
0395ffc1 FD |
119 | struct sk_buff *rx_skb; |
120 | struct sk_buff_head txq; | |
121 | ||
122 | struct bcm_device *dev; | |
bdd8818e MH |
123 | }; |
124 | ||
0395ffc1 | 125 | /* List of BCM BT UART devices */ |
bb3ea16a | 126 | static DEFINE_MUTEX(bcm_device_lock); |
0395ffc1 FD |
127 | static LIST_HEAD(bcm_device_list); |
128 | ||
33cd149e LP |
129 | static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed) |
130 | { | |
131 | if (hu->serdev) | |
132 | serdev_device_set_baudrate(hu->serdev, speed); | |
133 | else | |
134 | hci_uart_set_baudrate(hu, speed); | |
135 | } | |
136 | ||
61b2fc2b FD |
137 | static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed) |
138 | { | |
139 | struct hci_dev *hdev = hu->hdev; | |
140 | struct sk_buff *skb; | |
141 | struct bcm_update_uart_baud_rate param; | |
142 | ||
143 | if (speed > 3000000) { | |
144 | struct bcm_write_uart_clock_setting clock; | |
145 | ||
146 | clock.type = BCM_UART_CLOCK_48MHZ; | |
147 | ||
65ad07c9 | 148 | bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type); |
61b2fc2b FD |
149 | |
150 | /* This Broadcom specific command changes the UART's controller | |
151 | * clock for baud rate > 3000000. | |
152 | */ | |
153 | skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT); | |
154 | if (IS_ERR(skb)) { | |
155 | int err = PTR_ERR(skb); | |
65ad07c9 FD |
156 | bt_dev_err(hdev, "BCM: failed to write clock (%d)", |
157 | err); | |
61b2fc2b FD |
158 | return err; |
159 | } | |
160 | ||
161 | kfree_skb(skb); | |
162 | } | |
163 | ||
65ad07c9 | 164 | bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed); |
61b2fc2b FD |
165 | |
166 | param.zero = cpu_to_le16(0); | |
167 | param.baud_rate = cpu_to_le32(speed); | |
168 | ||
169 | /* This Broadcom specific command changes the UART's controller baud | |
170 | * rate. | |
171 | */ | |
172 | skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), ¶m, | |
173 | HCI_INIT_TIMEOUT); | |
174 | if (IS_ERR(skb)) { | |
175 | int err = PTR_ERR(skb); | |
65ad07c9 FD |
176 | bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)", |
177 | err); | |
61b2fc2b FD |
178 | return err; |
179 | } | |
180 | ||
181 | kfree_skb(skb); | |
182 | ||
183 | return 0; | |
184 | } | |
185 | ||
917522aa | 186 | /* bcm_device_exists should be protected by bcm_device_lock */ |
0395ffc1 FD |
187 | static bool bcm_device_exists(struct bcm_device *device) |
188 | { | |
189 | struct list_head *p; | |
190 | ||
81a19053 | 191 | #ifdef CONFIG_PM |
8a920568 HG |
192 | /* Devices using serdev always exist */ |
193 | if (device && device->hu && device->hu->serdev) | |
194 | return true; | |
81a19053 | 195 | #endif |
8a920568 | 196 | |
0395ffc1 FD |
197 | list_for_each(p, &bcm_device_list) { |
198 | struct bcm_device *dev = list_entry(p, struct bcm_device, list); | |
199 | ||
200 | if (device == dev) | |
201 | return true; | |
202 | } | |
203 | ||
204 | return false; | |
205 | } | |
206 | ||
207 | static int bcm_gpio_set_power(struct bcm_device *dev, bool powered) | |
208 | { | |
8bfa7e1e | 209 | int err; |
0395ffc1 | 210 | |
8bfa7e1e LW |
211 | if (powered && !IS_ERR(dev->clk) && !dev->clk_enabled) { |
212 | err = clk_prepare_enable(dev->clk); | |
213 | if (err) | |
214 | return err; | |
215 | } | |
216 | ||
217 | err = dev->set_shutdown(dev, powered); | |
218 | if (err) | |
219 | goto err_clk_disable; | |
220 | ||
221 | err = dev->set_device_wakeup(dev, powered); | |
222 | if (err) | |
223 | goto err_revert_shutdown; | |
0395ffc1 FD |
224 | |
225 | if (!powered && !IS_ERR(dev->clk) && dev->clk_enabled) | |
730ce397 | 226 | clk_disable_unprepare(dev->clk); |
0395ffc1 FD |
227 | |
228 | dev->clk_enabled = powered; | |
229 | ||
230 | return 0; | |
8bfa7e1e LW |
231 | |
232 | err_revert_shutdown: | |
233 | dev->set_shutdown(dev, !powered); | |
234 | err_clk_disable: | |
235 | if (powered && !IS_ERR(dev->clk) && !dev->clk_enabled) | |
236 | clk_disable_unprepare(dev->clk); | |
237 | return err; | |
0395ffc1 FD |
238 | } |
239 | ||
b7a622a2 | 240 | #ifdef CONFIG_PM |
6cc4396c FD |
241 | static irqreturn_t bcm_host_wake(int irq, void *data) |
242 | { | |
243 | struct bcm_device *bdev = data; | |
244 | ||
245 | bt_dev_dbg(bdev, "Host wake IRQ"); | |
246 | ||
43fff768 | 247 | pm_request_resume(bdev->dev); |
e88ab30d | 248 | |
6cc4396c FD |
249 | return IRQ_HANDLED; |
250 | } | |
251 | ||
252 | static int bcm_request_irq(struct bcm_data *bcm) | |
253 | { | |
254 | struct bcm_device *bdev = bcm->dev; | |
98dc77d5 | 255 | int err; |
6cc4396c | 256 | |
6cc4396c FD |
257 | mutex_lock(&bcm_device_lock); |
258 | if (!bcm_device_exists(bdev)) { | |
259 | err = -ENODEV; | |
260 | goto unlock; | |
261 | } | |
262 | ||
98dc77d5 LP |
263 | if (bdev->irq <= 0) { |
264 | err = -EOPNOTSUPP; | |
265 | goto unlock; | |
266 | } | |
6cc4396c | 267 | |
c0d3ce58 | 268 | err = devm_request_irq(bdev->dev, bdev->irq, bcm_host_wake, |
227630cc HG |
269 | bdev->irq_active_low ? IRQF_TRIGGER_FALLING : |
270 | IRQF_TRIGGER_RISING, | |
271 | "host_wake", bdev); | |
4dc27330 LW |
272 | if (err) { |
273 | bdev->irq = err; | |
98dc77d5 | 274 | goto unlock; |
4dc27330 | 275 | } |
e88ab30d | 276 | |
c0d3ce58 | 277 | device_init_wakeup(bdev->dev, true); |
98dc77d5 | 278 | |
c0d3ce58 | 279 | pm_runtime_set_autosuspend_delay(bdev->dev, |
98dc77d5 | 280 | BCM_AUTOSUSPEND_DELAY); |
c0d3ce58 HG |
281 | pm_runtime_use_autosuspend(bdev->dev); |
282 | pm_runtime_set_active(bdev->dev); | |
283 | pm_runtime_enable(bdev->dev); | |
6cc4396c FD |
284 | |
285 | unlock: | |
286 | mutex_unlock(&bcm_device_lock); | |
287 | ||
288 | return err; | |
289 | } | |
290 | ||
291 | static const struct bcm_set_sleep_mode default_sleep_params = { | |
292 | .sleep_mode = 1, /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */ | |
293 | .idle_host = 2, /* idle threshold HOST, in 300ms */ | |
294 | .idle_dev = 2, /* idle threshold device, in 300ms */ | |
295 | .bt_wake_active = 1, /* BT_WAKE active mode: 1 = high, 0 = low */ | |
296 | .host_wake_active = 0, /* HOST_WAKE active mode: 1 = high, 0 = low */ | |
297 | .allow_host_sleep = 1, /* Allow host sleep in SCO flag */ | |
e88ab30d | 298 | .combine_modes = 1, /* Combine sleep and LPM flag */ |
6cc4396c FD |
299 | .tristate_control = 0, /* Allow tri-state control of UART tx flag */ |
300 | /* Irrelevant USB flags */ | |
301 | .usb_auto_sleep = 0, | |
302 | .usb_resume_timeout = 0, | |
303 | .pulsed_host_wake = 0, | |
304 | .break_to_host = 0 | |
305 | }; | |
306 | ||
307 | static int bcm_setup_sleep(struct hci_uart *hu) | |
308 | { | |
309 | struct bcm_data *bcm = hu->priv; | |
310 | struct sk_buff *skb; | |
311 | struct bcm_set_sleep_mode sleep_params = default_sleep_params; | |
312 | ||
227630cc | 313 | sleep_params.host_wake_active = !bcm->dev->irq_active_low; |
6cc4396c FD |
314 | |
315 | skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params), | |
316 | &sleep_params, HCI_INIT_TIMEOUT); | |
317 | if (IS_ERR(skb)) { | |
318 | int err = PTR_ERR(skb); | |
319 | bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err); | |
320 | return err; | |
321 | } | |
322 | kfree_skb(skb); | |
323 | ||
324 | bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded"); | |
325 | ||
326 | return 0; | |
327 | } | |
328 | #else | |
329 | static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; } | |
330 | static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; } | |
331 | #endif | |
332 | ||
075e1f5e MH |
333 | static int bcm_set_diag(struct hci_dev *hdev, bool enable) |
334 | { | |
335 | struct hci_uart *hu = hci_get_drvdata(hdev); | |
336 | struct bcm_data *bcm = hu->priv; | |
337 | struct sk_buff *skb; | |
338 | ||
339 | if (!test_bit(HCI_RUNNING, &hdev->flags)) | |
340 | return -ENETDOWN; | |
341 | ||
342 | skb = bt_skb_alloc(3, GFP_KERNEL); | |
a1857390 DC |
343 | if (!skb) |
344 | return -ENOMEM; | |
075e1f5e | 345 | |
634fef61 JB |
346 | skb_put_u8(skb, BCM_LM_DIAG_PKT); |
347 | skb_put_u8(skb, 0xf0); | |
348 | skb_put_u8(skb, enable); | |
075e1f5e MH |
349 | |
350 | skb_queue_tail(&bcm->txq, skb); | |
351 | hci_uart_tx_wakeup(hu); | |
352 | ||
353 | return 0; | |
354 | } | |
355 | ||
bdd8818e MH |
356 | static int bcm_open(struct hci_uart *hu) |
357 | { | |
358 | struct bcm_data *bcm; | |
0395ffc1 | 359 | struct list_head *p; |
8bfa7e1e | 360 | int err; |
bdd8818e | 361 | |
65ad07c9 | 362 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
bdd8818e MH |
363 | |
364 | bcm = kzalloc(sizeof(*bcm), GFP_KERNEL); | |
365 | if (!bcm) | |
366 | return -ENOMEM; | |
367 | ||
368 | skb_queue_head_init(&bcm->txq); | |
369 | ||
370 | hu->priv = bcm; | |
0395ffc1 | 371 | |
8a920568 HG |
372 | mutex_lock(&bcm_device_lock); |
373 | ||
33cd149e | 374 | if (hu->serdev) { |
8bfa7e1e LW |
375 | err = serdev_device_open(hu->serdev); |
376 | if (err) | |
377 | goto err_free; | |
378 | ||
8a920568 | 379 | bcm->dev = serdev_device_get_drvdata(hu->serdev); |
33cd149e LP |
380 | goto out; |
381 | } | |
382 | ||
95065a61 JH |
383 | if (!hu->tty->dev) |
384 | goto out; | |
385 | ||
0395ffc1 FD |
386 | list_for_each(p, &bcm_device_list) { |
387 | struct bcm_device *dev = list_entry(p, struct bcm_device, list); | |
388 | ||
389 | /* Retrieve saved bcm_device based on parent of the | |
390 | * platform device (saved during device probe) and | |
391 | * parent of tty device used by hci_uart | |
392 | */ | |
c0d3ce58 | 393 | if (hu->tty->dev->parent == dev->dev->parent) { |
0395ffc1 | 394 | bcm->dev = dev; |
b7a622a2 | 395 | #ifdef CONFIG_PM |
118612fb FD |
396 | dev->hu = hu; |
397 | #endif | |
0395ffc1 FD |
398 | break; |
399 | } | |
400 | } | |
401 | ||
95065a61 | 402 | out: |
8a920568 HG |
403 | if (bcm->dev) { |
404 | hu->init_speed = bcm->dev->init_speed; | |
405 | hu->oper_speed = bcm->dev->oper_speed; | |
8bfa7e1e LW |
406 | err = bcm_gpio_set_power(bcm->dev, true); |
407 | if (err) | |
408 | goto err_unset_hu; | |
8a920568 HG |
409 | } |
410 | ||
411 | mutex_unlock(&bcm_device_lock); | |
bdd8818e | 412 | return 0; |
8bfa7e1e LW |
413 | |
414 | err_unset_hu: | |
415 | #ifdef CONFIG_PM | |
416 | bcm->dev->hu = NULL; | |
417 | #endif | |
418 | err_free: | |
419 | mutex_unlock(&bcm_device_lock); | |
420 | hu->priv = NULL; | |
421 | kfree(bcm); | |
422 | return err; | |
bdd8818e MH |
423 | } |
424 | ||
425 | static int bcm_close(struct hci_uart *hu) | |
426 | { | |
427 | struct bcm_data *bcm = hu->priv; | |
8a920568 | 428 | struct bcm_device *bdev = NULL; |
8bfa7e1e | 429 | int err; |
bdd8818e | 430 | |
65ad07c9 | 431 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
bdd8818e | 432 | |
0395ffc1 | 433 | /* Protect bcm->dev against removal of the device or driver */ |
bb3ea16a | 434 | mutex_lock(&bcm_device_lock); |
8a920568 HG |
435 | |
436 | if (hu->serdev) { | |
437 | serdev_device_close(hu->serdev); | |
438 | bdev = serdev_device_get_drvdata(hu->serdev); | |
439 | } else if (bcm_device_exists(bcm->dev)) { | |
440 | bdev = bcm->dev; | |
441 | #ifdef CONFIG_PM | |
442 | bdev->hu = NULL; | |
443 | #endif | |
444 | } | |
445 | ||
446 | if (bdev) { | |
6d83f1ee | 447 | if (IS_ENABLED(CONFIG_PM) && bdev->irq > 0) { |
c0d3ce58 HG |
448 | devm_free_irq(bdev->dev, bdev->irq, bdev); |
449 | device_init_wakeup(bdev->dev, false); | |
f4cf6b7e | 450 | pm_runtime_disable(bdev->dev); |
6cc4396c | 451 | } |
54ba69f9 | 452 | |
8bfa7e1e LW |
453 | err = bcm_gpio_set_power(bdev, false); |
454 | if (err) | |
455 | bt_dev_err(hu->hdev, "Failed to power down"); | |
456 | else | |
457 | pm_runtime_set_suspended(bdev->dev); | |
118612fb | 458 | } |
bb3ea16a | 459 | mutex_unlock(&bcm_device_lock); |
0395ffc1 | 460 | |
bdd8818e MH |
461 | skb_queue_purge(&bcm->txq); |
462 | kfree_skb(bcm->rx_skb); | |
463 | kfree(bcm); | |
464 | ||
465 | hu->priv = NULL; | |
466 | return 0; | |
467 | } | |
468 | ||
469 | static int bcm_flush(struct hci_uart *hu) | |
470 | { | |
471 | struct bcm_data *bcm = hu->priv; | |
472 | ||
65ad07c9 | 473 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
bdd8818e MH |
474 | |
475 | skb_queue_purge(&bcm->txq); | |
476 | ||
477 | return 0; | |
478 | } | |
479 | ||
480 | static int bcm_setup(struct hci_uart *hu) | |
481 | { | |
6cc4396c | 482 | struct bcm_data *bcm = hu->priv; |
6be09b48 FD |
483 | char fw_name[64]; |
484 | const struct firmware *fw; | |
960ef1d7 | 485 | unsigned int speed; |
6be09b48 FD |
486 | int err; |
487 | ||
65ad07c9 | 488 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
bdd8818e | 489 | |
075e1f5e | 490 | hu->hdev->set_diag = bcm_set_diag; |
bdd8818e MH |
491 | hu->hdev->set_bdaddr = btbcm_set_bdaddr; |
492 | ||
6be09b48 FD |
493 | err = btbcm_initialize(hu->hdev, fw_name, sizeof(fw_name)); |
494 | if (err) | |
495 | return err; | |
496 | ||
497 | err = request_firmware(&fw, fw_name, &hu->hdev->dev); | |
498 | if (err < 0) { | |
65ad07c9 | 499 | bt_dev_info(hu->hdev, "BCM: Patch %s not found", fw_name); |
6be09b48 FD |
500 | return 0; |
501 | } | |
502 | ||
503 | err = btbcm_patchram(hu->hdev, fw); | |
504 | if (err) { | |
65ad07c9 | 505 | bt_dev_info(hu->hdev, "BCM: Patch failed (%d)", err); |
6be09b48 FD |
506 | goto finalize; |
507 | } | |
508 | ||
960ef1d7 FD |
509 | /* Init speed if any */ |
510 | if (hu->init_speed) | |
511 | speed = hu->init_speed; | |
512 | else if (hu->proto->init_speed) | |
513 | speed = hu->proto->init_speed; | |
514 | else | |
515 | speed = 0; | |
516 | ||
517 | if (speed) | |
33cd149e | 518 | host_set_baudrate(hu, speed); |
960ef1d7 FD |
519 | |
520 | /* Operational speed if any */ | |
521 | if (hu->oper_speed) | |
522 | speed = hu->oper_speed; | |
523 | else if (hu->proto->oper_speed) | |
524 | speed = hu->proto->oper_speed; | |
525 | else | |
526 | speed = 0; | |
527 | ||
528 | if (speed) { | |
529 | err = bcm_set_baudrate(hu, speed); | |
61b2fc2b | 530 | if (!err) |
33cd149e | 531 | host_set_baudrate(hu, speed); |
61b2fc2b FD |
532 | } |
533 | ||
6be09b48 FD |
534 | finalize: |
535 | release_firmware(fw); | |
536 | ||
537 | err = btbcm_finalize(hu->hdev); | |
6cc4396c FD |
538 | if (err) |
539 | return err; | |
540 | ||
cdd24a20 | 541 | if (!bcm_request_irq(bcm)) |
6cc4396c | 542 | err = bcm_setup_sleep(hu); |
6be09b48 FD |
543 | |
544 | return err; | |
bdd8818e MH |
545 | } |
546 | ||
94c58132 MH |
547 | #define BCM_RECV_LM_DIAG \ |
548 | .type = BCM_LM_DIAG_PKT, \ | |
549 | .hlen = BCM_LM_DIAG_SIZE, \ | |
550 | .loff = 0, \ | |
551 | .lsize = 0, \ | |
552 | .maxlen = BCM_LM_DIAG_SIZE | |
553 | ||
01d5e44a MH |
554 | #define BCM_RECV_NULL \ |
555 | .type = BCM_NULL_PKT, \ | |
556 | .hlen = BCM_NULL_SIZE, \ | |
557 | .loff = 0, \ | |
558 | .lsize = 0, \ | |
559 | .maxlen = BCM_NULL_SIZE | |
560 | ||
79b8df93 | 561 | static const struct h4_recv_pkt bcm_recv_pkts[] = { |
94c58132 MH |
562 | { H4_RECV_ACL, .recv = hci_recv_frame }, |
563 | { H4_RECV_SCO, .recv = hci_recv_frame }, | |
564 | { H4_RECV_EVENT, .recv = hci_recv_frame }, | |
565 | { BCM_RECV_LM_DIAG, .recv = hci_recv_diag }, | |
01d5e44a | 566 | { BCM_RECV_NULL, .recv = hci_recv_diag }, |
79b8df93 MH |
567 | }; |
568 | ||
bdd8818e MH |
569 | static int bcm_recv(struct hci_uart *hu, const void *data, int count) |
570 | { | |
571 | struct bcm_data *bcm = hu->priv; | |
572 | ||
573 | if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) | |
574 | return -EUNATCH; | |
575 | ||
79b8df93 MH |
576 | bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count, |
577 | bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts)); | |
bdd8818e MH |
578 | if (IS_ERR(bcm->rx_skb)) { |
579 | int err = PTR_ERR(bcm->rx_skb); | |
65ad07c9 | 580 | bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err); |
37134167 | 581 | bcm->rx_skb = NULL; |
bdd8818e | 582 | return err; |
e88ab30d FD |
583 | } else if (!bcm->rx_skb) { |
584 | /* Delay auto-suspend when receiving completed packet */ | |
585 | mutex_lock(&bcm_device_lock); | |
43fff768 LW |
586 | if (bcm->dev && bcm_device_exists(bcm->dev)) |
587 | pm_request_resume(bcm->dev->dev); | |
e88ab30d | 588 | mutex_unlock(&bcm_device_lock); |
bdd8818e MH |
589 | } |
590 | ||
591 | return count; | |
592 | } | |
593 | ||
594 | static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb) | |
595 | { | |
596 | struct bcm_data *bcm = hu->priv; | |
597 | ||
65ad07c9 | 598 | bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb); |
bdd8818e MH |
599 | |
600 | /* Prepend skb with frame type */ | |
618e8bc2 | 601 | memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); |
bdd8818e MH |
602 | skb_queue_tail(&bcm->txq, skb); |
603 | ||
604 | return 0; | |
605 | } | |
606 | ||
607 | static struct sk_buff *bcm_dequeue(struct hci_uart *hu) | |
608 | { | |
609 | struct bcm_data *bcm = hu->priv; | |
e88ab30d FD |
610 | struct sk_buff *skb = NULL; |
611 | struct bcm_device *bdev = NULL; | |
612 | ||
613 | mutex_lock(&bcm_device_lock); | |
614 | ||
615 | if (bcm_device_exists(bcm->dev)) { | |
616 | bdev = bcm->dev; | |
c0d3ce58 | 617 | pm_runtime_get_sync(bdev->dev); |
e88ab30d FD |
618 | /* Shall be resumed here */ |
619 | } | |
620 | ||
621 | skb = skb_dequeue(&bcm->txq); | |
622 | ||
623 | if (bdev) { | |
c0d3ce58 HG |
624 | pm_runtime_mark_last_busy(bdev->dev); |
625 | pm_runtime_put_autosuspend(bdev->dev); | |
e88ab30d | 626 | } |
bdd8818e | 627 | |
e88ab30d FD |
628 | mutex_unlock(&bcm_device_lock); |
629 | ||
630 | return skb; | |
bdd8818e MH |
631 | } |
632 | ||
b7a622a2 FD |
633 | #ifdef CONFIG_PM |
634 | static int bcm_suspend_device(struct device *dev) | |
118612fb | 635 | { |
78277d73 | 636 | struct bcm_device *bdev = dev_get_drvdata(dev); |
8bfa7e1e | 637 | int err; |
118612fb | 638 | |
b7a622a2 | 639 | bt_dev_dbg(bdev, ""); |
917522aa | 640 | |
b7a622a2 | 641 | if (!bdev->is_suspended && bdev->hu) { |
118612fb FD |
642 | hci_uart_set_flow_control(bdev->hu, true); |
643 | ||
b7a622a2 | 644 | /* Once this returns, driver suspends BT via GPIO */ |
118612fb FD |
645 | bdev->is_suspended = true; |
646 | } | |
647 | ||
648 | /* Suspend the device */ | |
8bfa7e1e LW |
649 | err = bdev->set_device_wakeup(bdev, false); |
650 | if (err) { | |
651 | if (bdev->is_suspended && bdev->hu) { | |
652 | bdev->is_suspended = false; | |
653 | hci_uart_set_flow_control(bdev->hu, false); | |
654 | } | |
655 | return -EBUSY; | |
656 | } | |
657 | ||
3e81a4ca LW |
658 | bt_dev_dbg(bdev, "suspend, delaying 15 ms"); |
659 | mdelay(15); | |
118612fb | 660 | |
b7a622a2 FD |
661 | return 0; |
662 | } | |
663 | ||
664 | static int bcm_resume_device(struct device *dev) | |
665 | { | |
78277d73 | 666 | struct bcm_device *bdev = dev_get_drvdata(dev); |
8bfa7e1e | 667 | int err; |
b7a622a2 FD |
668 | |
669 | bt_dev_dbg(bdev, ""); | |
670 | ||
8bfa7e1e LW |
671 | err = bdev->set_device_wakeup(bdev, true); |
672 | if (err) { | |
673 | dev_err(dev, "Failed to power up\n"); | |
674 | return err; | |
675 | } | |
676 | ||
3e81a4ca LW |
677 | bt_dev_dbg(bdev, "resume, delaying 15 ms"); |
678 | mdelay(15); | |
b7a622a2 FD |
679 | |
680 | /* When this executes, the device has woken up already */ | |
681 | if (bdev->is_suspended && bdev->hu) { | |
682 | bdev->is_suspended = false; | |
683 | ||
684 | hci_uart_set_flow_control(bdev->hu, false); | |
685 | } | |
686 | ||
687 | return 0; | |
688 | } | |
689 | #endif | |
690 | ||
691 | #ifdef CONFIG_PM_SLEEP | |
8a920568 | 692 | /* suspend callback */ |
b7a622a2 FD |
693 | static int bcm_suspend(struct device *dev) |
694 | { | |
78277d73 | 695 | struct bcm_device *bdev = dev_get_drvdata(dev); |
b7a622a2 FD |
696 | int error; |
697 | ||
698 | bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended); | |
699 | ||
8a920568 HG |
700 | /* |
701 | * When used with a device instantiated as platform_device, bcm_suspend | |
702 | * can be called at any time as long as the platform device is bound, | |
703 | * so it should use bcm_device_lock to protect access to hci_uart | |
b7a622a2 FD |
704 | * and device_wake-up GPIO. |
705 | */ | |
706 | mutex_lock(&bcm_device_lock); | |
707 | ||
708 | if (!bdev->hu) | |
709 | goto unlock; | |
710 | ||
e88ab30d FD |
711 | if (pm_runtime_active(dev)) |
712 | bcm_suspend_device(dev); | |
b7a622a2 | 713 | |
4a59f1fa | 714 | if (device_may_wakeup(dev) && bdev->irq > 0) { |
6cc4396c FD |
715 | error = enable_irq_wake(bdev->irq); |
716 | if (!error) | |
717 | bt_dev_dbg(bdev, "BCM irq: enabled"); | |
718 | } | |
719 | ||
917522aa | 720 | unlock: |
bb3ea16a | 721 | mutex_unlock(&bcm_device_lock); |
917522aa | 722 | |
118612fb FD |
723 | return 0; |
724 | } | |
725 | ||
8a920568 | 726 | /* resume callback */ |
118612fb FD |
727 | static int bcm_resume(struct device *dev) |
728 | { | |
78277d73 | 729 | struct bcm_device *bdev = dev_get_drvdata(dev); |
8bfa7e1e | 730 | int err = 0; |
118612fb | 731 | |
65ad07c9 | 732 | bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended); |
118612fb | 733 | |
8a920568 HG |
734 | /* |
735 | * When used with a device instantiated as platform_device, bcm_resume | |
736 | * can be called at any time as long as platform device is bound, | |
737 | * so it should use bcm_device_lock to protect access to hci_uart | |
b7a622a2 FD |
738 | * and device_wake-up GPIO. |
739 | */ | |
bb3ea16a | 740 | mutex_lock(&bcm_device_lock); |
917522aa FD |
741 | |
742 | if (!bdev->hu) | |
743 | goto unlock; | |
744 | ||
4a59f1fa | 745 | if (device_may_wakeup(dev) && bdev->irq > 0) { |
6cc4396c FD |
746 | disable_irq_wake(bdev->irq); |
747 | bt_dev_dbg(bdev, "BCM irq: disabled"); | |
748 | } | |
749 | ||
8bfa7e1e | 750 | err = bcm_resume_device(dev); |
118612fb | 751 | |
917522aa | 752 | unlock: |
bb3ea16a | 753 | mutex_unlock(&bcm_device_lock); |
917522aa | 754 | |
8bfa7e1e LW |
755 | if (!err) { |
756 | pm_runtime_disable(dev); | |
757 | pm_runtime_set_active(dev); | |
758 | pm_runtime_enable(dev); | |
759 | } | |
e88ab30d | 760 | |
118612fb FD |
761 | return 0; |
762 | } | |
763 | #endif | |
764 | ||
89ab37b4 DD |
765 | static const struct acpi_gpio_params int_last_device_wakeup_gpios = { 0, 0, false }; |
766 | static const struct acpi_gpio_params int_last_shutdown_gpios = { 1, 0, false }; | |
767 | static const struct acpi_gpio_params int_last_host_wakeup_gpios = { 2, 0, false }; | |
768 | ||
769 | static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = { | |
770 | { "device-wakeup-gpios", &int_last_device_wakeup_gpios, 1 }, | |
771 | { "shutdown-gpios", &int_last_shutdown_gpios, 1 }, | |
772 | { "host-wakeup-gpios", &int_last_host_wakeup_gpios, 1 }, | |
773 | { }, | |
774 | }; | |
775 | ||
776 | static const struct acpi_gpio_params int_first_host_wakeup_gpios = { 0, 0, false }; | |
777 | static const struct acpi_gpio_params int_first_device_wakeup_gpios = { 1, 0, false }; | |
778 | static const struct acpi_gpio_params int_first_shutdown_gpios = { 2, 0, false }; | |
779 | ||
780 | static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = { | |
781 | { "device-wakeup-gpios", &int_first_device_wakeup_gpios, 1 }, | |
782 | { "shutdown-gpios", &int_first_shutdown_gpios, 1 }, | |
783 | { "host-wakeup-gpios", &int_first_host_wakeup_gpios, 1 }, | |
0395ffc1 FD |
784 | { }, |
785 | }; | |
786 | ||
50d78bcf | 787 | #ifdef CONFIG_ACPI |
5cebdfea | 788 | /* IRQ polarity of some chipsets are not defined correctly in ACPI table. */ |
227630cc | 789 | static const struct dmi_system_id bcm_active_low_irq_dmi_table[] = { |
5cebdfea FD |
790 | { |
791 | .ident = "Asus T100TA", | |
792 | .matches = { | |
793 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, | |
794 | "ASUSTeK COMPUTER INC."), | |
795 | DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T100TA"), | |
796 | }, | |
5cebdfea | 797 | }, |
c4c285da HG |
798 | { |
799 | .ident = "Asus T100CHI", | |
800 | .matches = { | |
801 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, | |
802 | "ASUSTeK COMPUTER INC."), | |
803 | DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T100CHI"), | |
804 | }, | |
c4c285da | 805 | }, |
5e2bd93b JB |
806 | { /* Handle ThinkPad 8 tablets with BCM2E55 chipset ACPI ID */ |
807 | .ident = "Lenovo ThinkPad 8", | |
808 | .matches = { | |
809 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"), | |
810 | DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "ThinkPad 8"), | |
811 | }, | |
5e2bd93b | 812 | }, |
1bdb68b2 IM |
813 | { |
814 | .ident = "MINIX Z83-4", | |
815 | .matches = { | |
816 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, "MINIX"), | |
817 | DMI_MATCH(DMI_PRODUCT_NAME, "Z83-4"), | |
818 | }, | |
819 | }, | |
5cebdfea FD |
820 | { } |
821 | }; | |
822 | ||
ae056908 FD |
823 | static int bcm_resource(struct acpi_resource *ares, void *data) |
824 | { | |
825 | struct bcm_device *dev = data; | |
6cc4396c FD |
826 | struct acpi_resource_extended_irq *irq; |
827 | struct acpi_resource_gpio *gpio; | |
828 | struct acpi_resource_uart_serialbus *sb; | |
829 | ||
830 | switch (ares->type) { | |
831 | case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: | |
832 | irq = &ares->data.extended_irq; | |
227630cc | 833 | dev->irq_active_low = irq->polarity == ACPI_ACTIVE_LOW; |
6cc4396c FD |
834 | break; |
835 | ||
836 | case ACPI_RESOURCE_TYPE_GPIO: | |
837 | gpio = &ares->data.gpio; | |
838 | if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) | |
227630cc | 839 | dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW; |
6cc4396c FD |
840 | break; |
841 | ||
842 | case ACPI_RESOURCE_TYPE_SERIAL_BUS: | |
ae056908 | 843 | sb = &ares->data.uart_serial_bus; |
74183a1c | 844 | if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) { |
ae056908 | 845 | dev->init_speed = sb->default_baud_rate; |
74183a1c MH |
846 | dev->oper_speed = 4000000; |
847 | } | |
6cc4396c FD |
848 | break; |
849 | ||
850 | default: | |
851 | break; | |
ae056908 FD |
852 | } |
853 | ||
9d54fd6a | 854 | return 0; |
ae056908 | 855 | } |
4c33162c LW |
856 | |
857 | static int bcm_apple_set_device_wakeup(struct bcm_device *dev, bool awake) | |
858 | { | |
859 | if (ACPI_FAILURE(acpi_execute_simple_method(dev->btlp, NULL, !awake))) | |
860 | return -EIO; | |
861 | ||
862 | return 0; | |
863 | } | |
864 | ||
865 | static int bcm_apple_set_shutdown(struct bcm_device *dev, bool powered) | |
866 | { | |
867 | if (ACPI_FAILURE(acpi_evaluate_object(powered ? dev->btpu : dev->btpd, | |
868 | NULL, NULL, NULL))) | |
869 | return -EIO; | |
870 | ||
871 | return 0; | |
872 | } | |
873 | ||
874 | static int bcm_apple_get_resources(struct bcm_device *dev) | |
875 | { | |
876 | struct acpi_device *adev = ACPI_COMPANION(dev->dev); | |
877 | const union acpi_object *obj; | |
878 | ||
879 | if (!adev || | |
880 | ACPI_FAILURE(acpi_get_handle(adev->handle, "BTLP", &dev->btlp)) || | |
881 | ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPU", &dev->btpu)) || | |
882 | ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPD", &dev->btpd))) | |
883 | return -ENODEV; | |
884 | ||
885 | if (!acpi_dev_get_property(adev, "baud", ACPI_TYPE_BUFFER, &obj) && | |
886 | obj->buffer.length == 8) | |
887 | dev->init_speed = *(u64 *)obj->buffer.pointer; | |
888 | ||
889 | dev->set_device_wakeup = bcm_apple_set_device_wakeup; | |
890 | dev->set_shutdown = bcm_apple_set_shutdown; | |
891 | ||
892 | return 0; | |
893 | } | |
894 | #else | |
895 | static inline int bcm_apple_get_resources(struct bcm_device *dev) | |
896 | { | |
897 | return -EOPNOTSUPP; | |
898 | } | |
212d7183 | 899 | #endif /* CONFIG_ACPI */ |
ae056908 | 900 | |
8353b4a6 LW |
901 | static int bcm_gpio_set_device_wakeup(struct bcm_device *dev, bool awake) |
902 | { | |
903 | gpiod_set_value(dev->device_wakeup, awake); | |
904 | return 0; | |
905 | } | |
906 | ||
907 | static int bcm_gpio_set_shutdown(struct bcm_device *dev, bool powered) | |
908 | { | |
909 | gpiod_set_value(dev->shutdown, powered); | |
910 | return 0; | |
911 | } | |
912 | ||
42ef18f0 | 913 | static int bcm_get_resources(struct bcm_device *dev) |
0395ffc1 | 914 | { |
c0d3ce58 | 915 | dev->name = dev_name(dev->dev); |
0395ffc1 | 916 | |
4c33162c LW |
917 | if (x86_apple_machine && !bcm_apple_get_resources(dev)) |
918 | return 0; | |
919 | ||
c0d3ce58 | 920 | dev->clk = devm_clk_get(dev->dev, NULL); |
89ab37b4 | 921 | |
3e81a4ca LW |
922 | dev->device_wakeup = devm_gpiod_get(dev->dev, "device-wakeup", |
923 | GPIOD_OUT_LOW); | |
62aaefa7 UKK |
924 | if (IS_ERR(dev->device_wakeup)) |
925 | return PTR_ERR(dev->device_wakeup); | |
0395ffc1 | 926 | |
3e81a4ca | 927 | dev->shutdown = devm_gpiod_get(dev->dev, "shutdown", GPIOD_OUT_LOW); |
62aaefa7 UKK |
928 | if (IS_ERR(dev->shutdown)) |
929 | return PTR_ERR(dev->shutdown); | |
0395ffc1 | 930 | |
8353b4a6 LW |
931 | dev->set_device_wakeup = bcm_gpio_set_device_wakeup; |
932 | dev->set_shutdown = bcm_gpio_set_shutdown; | |
933 | ||
6cc4396c | 934 | /* IRQ can be declared in ACPI table as Interrupt or GpioInt */ |
6cc4396c FD |
935 | if (dev->irq <= 0) { |
936 | struct gpio_desc *gpio; | |
937 | ||
c0d3ce58 | 938 | gpio = devm_gpiod_get_optional(dev->dev, "host-wakeup", |
6cc4396c FD |
939 | GPIOD_IN); |
940 | if (IS_ERR(gpio)) | |
941 | return PTR_ERR(gpio); | |
942 | ||
943 | dev->irq = gpiod_to_irq(gpio); | |
944 | } | |
945 | ||
c0d3ce58 | 946 | dev_info(dev->dev, "BCM irq: %d\n", dev->irq); |
212d7183 AS |
947 | return 0; |
948 | } | |
949 | ||
950 | #ifdef CONFIG_ACPI | |
951 | static int bcm_acpi_probe(struct bcm_device *dev) | |
952 | { | |
212d7183 AS |
953 | LIST_HEAD(resources); |
954 | const struct dmi_system_id *dmi_id; | |
955 | const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios; | |
956 | const struct acpi_device_id *id; | |
9d54fd6a | 957 | struct resource_entry *entry; |
212d7183 AS |
958 | int ret; |
959 | ||
960 | /* Retrieve GPIO data */ | |
c0d3ce58 | 961 | id = acpi_match_device(dev->dev->driver->acpi_match_table, dev->dev); |
212d7183 AS |
962 | if (id) |
963 | gpio_mapping = (const struct acpi_gpio_mapping *) id->driver_data; | |
964 | ||
c0d3ce58 | 965 | ret = devm_acpi_dev_add_driver_gpios(dev->dev, gpio_mapping); |
212d7183 AS |
966 | if (ret) |
967 | return ret; | |
968 | ||
ae056908 | 969 | /* Retrieve UART ACPI info */ |
c0d3ce58 | 970 | ret = acpi_dev_get_resources(ACPI_COMPANION(dev->dev), |
e98d6d62 | 971 | &resources, bcm_resource, dev); |
5be00284 JN |
972 | if (ret < 0) |
973 | return ret; | |
9d54fd6a HG |
974 | |
975 | resource_list_for_each_entry(entry, &resources) { | |
976 | if (resource_type(entry->res) == IORESOURCE_IRQ) { | |
977 | dev->irq = entry->res->start; | |
978 | break; | |
979 | } | |
980 | } | |
09dbf1b7 | 981 | acpi_dev_free_resource_list(&resources); |
ae056908 | 982 | |
227630cc | 983 | dmi_id = dmi_first_match(bcm_active_low_irq_dmi_table); |
5cebdfea | 984 | if (dmi_id) { |
e8bfe868 | 985 | dev_warn(dev->dev, "%s: Overwriting IRQ polarity to active low", |
5cebdfea | 986 | dmi_id->ident); |
227630cc | 987 | dev->irq_active_low = true; |
5cebdfea FD |
988 | } |
989 | ||
0395ffc1 FD |
990 | return 0; |
991 | } | |
50d78bcf FD |
992 | #else |
993 | static int bcm_acpi_probe(struct bcm_device *dev) | |
994 | { | |
995 | return -EINVAL; | |
996 | } | |
997 | #endif /* CONFIG_ACPI */ | |
0395ffc1 | 998 | |
8a920568 HG |
999 | static int bcm_of_probe(struct bcm_device *bdev) |
1000 | { | |
1001 | device_property_read_u32(bdev->dev, "max-speed", &bdev->oper_speed); | |
1002 | return 0; | |
1003 | } | |
1004 | ||
0395ffc1 FD |
1005 | static int bcm_probe(struct platform_device *pdev) |
1006 | { | |
1007 | struct bcm_device *dev; | |
0395ffc1 FD |
1008 | int ret; |
1009 | ||
1010 | dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); | |
1011 | if (!dev) | |
1012 | return -ENOMEM; | |
1013 | ||
c0d3ce58 | 1014 | dev->dev = &pdev->dev; |
4a56f891 | 1015 | dev->irq = platform_get_irq(pdev, 0); |
0395ffc1 | 1016 | |
201762e2 | 1017 | if (has_acpi_companion(&pdev->dev)) { |
212d7183 | 1018 | ret = bcm_acpi_probe(dev); |
201762e2 HG |
1019 | if (ret) |
1020 | return ret; | |
1021 | } | |
1022 | ||
42ef18f0 | 1023 | ret = bcm_get_resources(dev); |
4d1c4558 JN |
1024 | if (ret) |
1025 | return ret; | |
0395ffc1 FD |
1026 | |
1027 | platform_set_drvdata(pdev, dev); | |
1028 | ||
1029 | dev_info(&pdev->dev, "%s device registered.\n", dev->name); | |
1030 | ||
1031 | /* Place this instance on the device list */ | |
bb3ea16a | 1032 | mutex_lock(&bcm_device_lock); |
0395ffc1 | 1033 | list_add_tail(&dev->list, &bcm_device_list); |
bb3ea16a | 1034 | mutex_unlock(&bcm_device_lock); |
0395ffc1 | 1035 | |
8bfa7e1e LW |
1036 | ret = bcm_gpio_set_power(dev, false); |
1037 | if (ret) | |
1038 | dev_err(&pdev->dev, "Failed to power down\n"); | |
0395ffc1 FD |
1039 | |
1040 | return 0; | |
1041 | } | |
1042 | ||
1043 | static int bcm_remove(struct platform_device *pdev) | |
1044 | { | |
1045 | struct bcm_device *dev = platform_get_drvdata(pdev); | |
1046 | ||
bb3ea16a | 1047 | mutex_lock(&bcm_device_lock); |
0395ffc1 | 1048 | list_del(&dev->list); |
bb3ea16a | 1049 | mutex_unlock(&bcm_device_lock); |
0395ffc1 | 1050 | |
0395ffc1 FD |
1051 | dev_info(&pdev->dev, "%s device unregistered.\n", dev->name); |
1052 | ||
1053 | return 0; | |
1054 | } | |
1055 | ||
bdd8818e MH |
1056 | static const struct hci_uart_proto bcm_proto = { |
1057 | .id = HCI_UART_BCM, | |
143f0a28 | 1058 | .name = "Broadcom", |
aee61f7a | 1059 | .manufacturer = 15, |
61b2fc2b | 1060 | .init_speed = 115200, |
bdd8818e MH |
1061 | .open = bcm_open, |
1062 | .close = bcm_close, | |
1063 | .flush = bcm_flush, | |
1064 | .setup = bcm_setup, | |
61b2fc2b | 1065 | .set_baudrate = bcm_set_baudrate, |
bdd8818e MH |
1066 | .recv = bcm_recv, |
1067 | .enqueue = bcm_enqueue, | |
1068 | .dequeue = bcm_dequeue, | |
1069 | }; | |
1070 | ||
0395ffc1 FD |
1071 | #ifdef CONFIG_ACPI |
1072 | static const struct acpi_device_id bcm_acpi_match[] = { | |
89ab37b4 DD |
1073 | { "BCM2E1A", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, |
1074 | { "BCM2E39", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
1075 | { "BCM2E3A", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
1076 | { "BCM2E3D", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
1077 | { "BCM2E3F", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
1078 | { "BCM2E40", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
1079 | { "BCM2E54", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
1080 | { "BCM2E55", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
1081 | { "BCM2E64", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
1082 | { "BCM2E65", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
1083 | { "BCM2E67", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
1084 | { "BCM2E71", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
c23fae11 | 1085 | { "BCM2E72", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, |
89ab37b4 DD |
1086 | { "BCM2E7B", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, |
1087 | { "BCM2E7C", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, | |
61d220a6 | 1088 | { "BCM2E7E", (kernel_ulong_t)&acpi_bcm_int_first_gpios }, |
89ab37b4 DD |
1089 | { "BCM2E95", (kernel_ulong_t)&acpi_bcm_int_first_gpios }, |
1090 | { "BCM2E96", (kernel_ulong_t)&acpi_bcm_int_first_gpios }, | |
1bdb68b2 | 1091 | { "BCM2EA4", (kernel_ulong_t)&acpi_bcm_int_first_gpios }, |
0395ffc1 FD |
1092 | { }, |
1093 | }; | |
1094 | MODULE_DEVICE_TABLE(acpi, bcm_acpi_match); | |
1095 | #endif | |
1096 | ||
8a920568 | 1097 | /* suspend and resume callbacks */ |
e88ab30d FD |
1098 | static const struct dev_pm_ops bcm_pm_ops = { |
1099 | SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume) | |
1100 | SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL) | |
1101 | }; | |
118612fb | 1102 | |
0395ffc1 FD |
1103 | static struct platform_driver bcm_driver = { |
1104 | .probe = bcm_probe, | |
1105 | .remove = bcm_remove, | |
1106 | .driver = { | |
1107 | .name = "hci_bcm", | |
1108 | .acpi_match_table = ACPI_PTR(bcm_acpi_match), | |
118612fb | 1109 | .pm = &bcm_pm_ops, |
0395ffc1 FD |
1110 | }, |
1111 | }; | |
1112 | ||
33cd149e LP |
1113 | static int bcm_serdev_probe(struct serdev_device *serdev) |
1114 | { | |
8a920568 | 1115 | struct bcm_device *bcmdev; |
33cd149e LP |
1116 | int err; |
1117 | ||
1118 | bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL); | |
1119 | if (!bcmdev) | |
1120 | return -ENOMEM; | |
1121 | ||
8a920568 | 1122 | bcmdev->dev = &serdev->dev; |
81a19053 | 1123 | #ifdef CONFIG_PM |
8a920568 | 1124 | bcmdev->hu = &bcmdev->serdev_hu; |
81a19053 | 1125 | #endif |
8a920568 | 1126 | bcmdev->serdev_hu.serdev = serdev; |
33cd149e LP |
1127 | serdev_device_set_drvdata(serdev, bcmdev); |
1128 | ||
8a920568 HG |
1129 | if (has_acpi_companion(&serdev->dev)) |
1130 | err = bcm_acpi_probe(bcmdev); | |
1131 | else | |
1132 | err = bcm_of_probe(bcmdev); | |
1133 | if (err) | |
1134 | return err; | |
33cd149e | 1135 | |
8a920568 HG |
1136 | err = bcm_get_resources(bcmdev); |
1137 | if (err) | |
1138 | return err; | |
1139 | ||
8bfa7e1e LW |
1140 | err = bcm_gpio_set_power(bcmdev, false); |
1141 | if (err) | |
1142 | dev_err(&serdev->dev, "Failed to power down\n"); | |
8a920568 HG |
1143 | |
1144 | return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto); | |
33cd149e LP |
1145 | } |
1146 | ||
1147 | static void bcm_serdev_remove(struct serdev_device *serdev) | |
1148 | { | |
8a920568 | 1149 | struct bcm_device *bcmdev = serdev_device_get_drvdata(serdev); |
33cd149e | 1150 | |
8a920568 | 1151 | hci_uart_unregister_device(&bcmdev->serdev_hu); |
33cd149e LP |
1152 | } |
1153 | ||
1154 | #ifdef CONFIG_OF | |
1155 | static const struct of_device_id bcm_bluetooth_of_match[] = { | |
1156 | { .compatible = "brcm,bcm43438-bt" }, | |
1157 | { }, | |
1158 | }; | |
1159 | MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match); | |
1160 | #endif | |
1161 | ||
1162 | static struct serdev_device_driver bcm_serdev_driver = { | |
1163 | .probe = bcm_serdev_probe, | |
1164 | .remove = bcm_serdev_remove, | |
1165 | .driver = { | |
1166 | .name = "hci_uart_bcm", | |
1167 | .of_match_table = of_match_ptr(bcm_bluetooth_of_match), | |
8a920568 HG |
1168 | .acpi_match_table = ACPI_PTR(bcm_acpi_match), |
1169 | .pm = &bcm_pm_ops, | |
33cd149e LP |
1170 | }, |
1171 | }; | |
1172 | ||
bdd8818e MH |
1173 | int __init bcm_init(void) |
1174 | { | |
33cd149e LP |
1175 | /* For now, we need to keep both platform device |
1176 | * driver (ACPI generated) and serdev driver (DT). | |
1177 | */ | |
0395ffc1 | 1178 | platform_driver_register(&bcm_driver); |
33cd149e | 1179 | serdev_device_driver_register(&bcm_serdev_driver); |
0395ffc1 | 1180 | |
bdd8818e MH |
1181 | return hci_uart_register_proto(&bcm_proto); |
1182 | } | |
1183 | ||
1184 | int __exit bcm_deinit(void) | |
1185 | { | |
0395ffc1 | 1186 | platform_driver_unregister(&bcm_driver); |
33cd149e | 1187 | serdev_device_driver_unregister(&bcm_serdev_driver); |
0395ffc1 | 1188 | |
bdd8818e MH |
1189 | return hci_uart_unregister_proto(&bcm_proto); |
1190 | } |