1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * |
4 | * Bluetooth HCI UART driver for Broadcom devices |
5 | * |
6 | * Copyright (C) 2015 Intel Corporation |
7 | */ |
8 | |
9 | #include <linux/kernel.h> |
10 | #include <linux/errno.h> |
11 | #include <linux/skbuff.h> |
12 | #include <linux/firmware.h> |
13 | #include <linux/module.h> |
14 | #include <linux/acpi.h> |
15 | #include <linux/of.h> |
16 | #include <linux/of_irq.h> |
17 | #include <linux/property.h> |
18 | #include <linux/platform_data/x86/apple.h> |
19 | #include <linux/platform_device.h> |
20 | #include <linux/regulator/consumer.h> |
21 | #include <linux/clk.h> |
22 | #include <linux/gpio/consumer.h> |
23 | #include <linux/gpio/machine.h> |
24 | #include <linux/tty.h> |
25 | #include <linux/interrupt.h> |
26 | #include <linux/dmi.h> |
27 | #include <linux/pm_runtime.h> |
28 | #include <linux/serdev.h> |
29 | |
30 | #include <net/bluetooth/bluetooth.h> |
31 | #include <net/bluetooth/hci_core.h> |
32 | |
33 | #include "btbcm.h" |
34 | #include "hci_uart.h" |
35 | |
36 | #define BCM_NULL_PKT 0x00 |
37 | #define BCM_NULL_SIZE 0 |
38 | |
39 | #define BCM_LM_DIAG_PKT 0x07 |
40 | #define BCM_LM_DIAG_SIZE 63 |
41 | |
42 | #define BCM_TYPE49_PKT 0x31 |
43 | #define BCM_TYPE49_SIZE 0 |
44 | |
45 | #define BCM_TYPE52_PKT 0x34 |
46 | #define BCM_TYPE52_SIZE 0 |
47 | |
48 | #define BCM_AUTOSUSPEND_DELAY 5000 /* default autosleep delay */ |
49 | |
50 | #define BCM_NUM_SUPPLIES 2 |
51 | |
52 | /** |
53 | * struct bcm_device_data - device specific data |
54 | * @no_early_set_baudrate: Disallow set baudrate before driver setup() |
55 | * @drive_rts_on_open: drive RTS signal on ->open() when platform requires it |
56 | * @no_uart_clock_set: UART clock set command for >3Mbps mode is unavailable |
57 | * @max_autobaud_speed: max baudrate supported by device in autobaud mode |
58 | * @max_speed: max baudrate supported |
59 | */ |
60 | struct bcm_device_data { |
61 | bool no_early_set_baudrate; |
62 | bool drive_rts_on_open; |
63 | bool no_uart_clock_set; |
64 | u32 max_autobaud_speed; |
65 | u32 max_speed; |
66 | }; |
67 | |
68 | /** |
69 | * struct bcm_device - device driver resources |
70 | * @serdev_hu: HCI UART controller struct |
71 | * @list: bcm_device_list node |
72 | * @dev: physical UART slave |
73 | * @name: device name logged by bt_dev_*() functions |
74 | * @device_wakeup: BT_WAKE pin, |
75 | * assert = Bluetooth device must wake up or remain awake, |
76 | * deassert = Bluetooth device may sleep when sleep criteria are met |
77 | * @shutdown: BT_REG_ON pin, |
78 | * power up or power down Bluetooth device internal regulators |
79 | * @reset: BT_RST_N pin, |
80 | * active low resets the Bluetooth logic core |
81 | * @set_device_wakeup: callback to toggle BT_WAKE pin |
82 | * either by accessing @device_wakeup or by calling @btlp |
83 | * @set_shutdown: callback to toggle BT_REG_ON pin |
84 | * either by accessing @shutdown or by calling @btpu/@btpd |
85 | * @btlp: Apple ACPI method to toggle BT_WAKE pin ("Bluetooth Low Power") |
86 | * @btpu: Apple ACPI method to drive BT_REG_ON pin high ("Bluetooth Power Up") |
87 | * @btpd: Apple ACPI method to drive BT_REG_ON pin low ("Bluetooth Power Down") |
88 | * @gpio_count: internal counter for GPIO resources associated with ACPI device |
89 | * @gpio_int_idx: index in _CRS for GpioInt() resource |
90 | * @txco_clk: external reference frequency clock used by Bluetooth device |
91 | * @lpo_clk: external LPO clock used by Bluetooth device |
92 | * @supplies: VBAT and VDDIO supplies used by Bluetooth device |
93 | * @res_enabled: whether clocks and supplies are prepared and enabled |
94 | * @init_speed: default baudrate of Bluetooth device; |
95 | * the host UART is initially set to this baudrate so that |
96 | * it can configure the Bluetooth device for @oper_speed |
97 | * @oper_speed: preferred baudrate of Bluetooth device; |
98 | * set to 0 if @init_speed is already the preferred baudrate |
99 | * @irq: interrupt triggered by HOST_WAKE_BT pin |
100 | * @irq_active_low: whether @irq is active low |
101 | * @irq_acquired: flag to show if IRQ handler has been assigned |
102 | * @hu: pointer to HCI UART controller struct, |
103 | * used to disable flow control during runtime suspend and system sleep |
104 | * @is_suspended: whether flow control is currently disabled |
105 | * @no_early_set_baudrate: don't set_baudrate before setup() |
106 | * @drive_rts_on_open: drive RTS signal on ->open() when platform requires it |
107 | * @no_uart_clock_set: UART clock set command for >3Mbps mode is unavailable |
108 | * @pcm_int_params: keep the initial PCM configuration |
109 | * @use_autobaud_mode: start Bluetooth device in autobaud mode |
110 | * @max_autobaud_speed: max baudrate supported by device in autobaud mode |
111 | */ |
112 | struct bcm_device { |
113 | /* Must be the first member, hci_serdev.c expects this. */ |
114 | struct hci_uart serdev_hu; |
115 | struct list_head list; |
116 | |
117 | struct device *dev; |
118 | |
119 | const char *name; |
120 | struct gpio_desc *device_wakeup; |
121 | struct gpio_desc *shutdown; |
122 | struct gpio_desc *reset; |
123 | int (*set_device_wakeup)(struct bcm_device *, bool); |
124 | int (*set_shutdown)(struct bcm_device *, bool); |
125 | #ifdef CONFIG_ACPI |
126 | acpi_handle btlp, btpu, btpd; |
127 | int gpio_count; |
128 | int gpio_int_idx; |
129 | #endif |
130 | |
131 | struct clk *txco_clk; |
132 | struct clk *lpo_clk; |
133 | struct regulator_bulk_data supplies[BCM_NUM_SUPPLIES]; |
134 | bool res_enabled; |
135 | |
136 | u32 init_speed; |
137 | u32 oper_speed; |
138 | int irq; |
139 | bool irq_active_low; |
140 | bool irq_acquired; |
141 | |
142 | #ifdef CONFIG_PM |
143 | struct hci_uart *hu; |
144 | bool is_suspended; |
145 | #endif |
146 | bool no_early_set_baudrate; |
147 | bool drive_rts_on_open; |
148 | bool no_uart_clock_set; |
149 | bool use_autobaud_mode; |
150 | u8 pcm_int_params[5]; |
151 | u32 max_autobaud_speed; |
152 | }; |
153 | |
154 | /* generic bcm uart resources */ |
155 | struct bcm_data { |
156 | struct sk_buff *rx_skb; |
157 | struct sk_buff_head txq; |
158 | |
159 | struct bcm_device *dev; |
160 | }; |
161 | |
162 | /* List of BCM BT UART devices */ |
163 | static DEFINE_MUTEX(bcm_device_lock); |
164 | static LIST_HEAD(bcm_device_list); |
165 | |
166 | static int irq_polarity = -1; |
167 | module_param(irq_polarity, int, 0444); |
168 | MODULE_PARM_DESC(irq_polarity, "IRQ polarity 0: active-high 1: active-low" ); |
169 | |
170 | static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed) |
171 | { |
172 | if (hu->serdev) |
173 | serdev_device_set_baudrate(hu->serdev, speed); |
174 | else |
175 | hci_uart_set_baudrate(hu, speed); |
176 | } |
177 | |
178 | static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed) |
179 | { |
180 | struct hci_dev *hdev = hu->hdev; |
181 | struct bcm_data *bcm = hu->priv; |
182 | struct sk_buff *skb; |
183 | struct bcm_update_uart_baud_rate param; |
184 | |
185 | if (speed > 3000000 && !bcm->dev->no_uart_clock_set) { |
186 | struct bcm_write_uart_clock_setting clock; |
187 | |
188 | clock.type = BCM_UART_CLOCK_48MHZ; |
189 | |
190 | bt_dev_dbg(hdev, "Set Controller clock (%d)" , clock.type); |
191 | |
192 | /* This Broadcom specific command changes the UART's controller |
193 | * clock for baud rate > 3000000. |
194 | */ |
195 | skb = __hci_cmd_sync(hdev, opcode: 0xfc45, plen: 1, param: &clock, HCI_INIT_TIMEOUT); |
196 | if (IS_ERR(ptr: skb)) { |
197 | int err = PTR_ERR(ptr: skb); |
198 | bt_dev_err(hdev, "BCM: failed to write clock (%d)" , |
199 | err); |
200 | return err; |
201 | } |
202 | |
203 | kfree_skb(skb); |
204 | } |
205 | |
206 | bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s" , speed); |
207 | |
208 | param.zero = cpu_to_le16(0); |
209 | param.baud_rate = cpu_to_le32(speed); |
210 | |
211 | /* This Broadcom specific command changes the UART's controller baud |
212 | * rate. |
213 | */ |
214 | skb = __hci_cmd_sync(hdev, opcode: 0xfc18, plen: sizeof(param), param: ¶m, |
215 | HCI_INIT_TIMEOUT); |
216 | if (IS_ERR(ptr: skb)) { |
217 | int err = PTR_ERR(ptr: skb); |
218 | bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)" , |
219 | err); |
220 | return err; |
221 | } |
222 | |
223 | kfree_skb(skb); |
224 | |
225 | return 0; |
226 | } |
227 | |
228 | /* bcm_device_exists should be protected by bcm_device_lock */ |
229 | static bool bcm_device_exists(struct bcm_device *device) |
230 | { |
231 | struct list_head *p; |
232 | |
233 | #ifdef CONFIG_PM |
234 | /* Devices using serdev always exist */ |
235 | if (device && device->hu && device->hu->serdev) |
236 | return true; |
237 | #endif |
238 | |
239 | list_for_each(p, &bcm_device_list) { |
240 | struct bcm_device *dev = list_entry(p, struct bcm_device, list); |
241 | |
242 | if (device == dev) |
243 | return true; |
244 | } |
245 | |
246 | return false; |
247 | } |
248 | |
249 | static int bcm_gpio_set_power(struct bcm_device *dev, bool powered) |
250 | { |
251 | int err; |
252 | |
253 | if (powered && !dev->res_enabled) { |
254 | /* Intel Macs use bcm_apple_get_resources() and don't |
255 | * have regulator supplies configured. |
256 | */ |
257 | if (dev->supplies[0].supply) { |
258 | err = regulator_bulk_enable(BCM_NUM_SUPPLIES, |
259 | consumers: dev->supplies); |
260 | if (err) |
261 | return err; |
262 | } |
263 | |
264 | /* LPO clock needs to be 32.768 kHz */ |
265 | err = clk_set_rate(clk: dev->lpo_clk, rate: 32768); |
266 | if (err) { |
267 | dev_err(dev->dev, "Could not set LPO clock rate\n" ); |
268 | goto err_regulator_disable; |
269 | } |
270 | |
271 | err = clk_prepare_enable(clk: dev->lpo_clk); |
272 | if (err) |
273 | goto err_regulator_disable; |
274 | |
275 | err = clk_prepare_enable(clk: dev->txco_clk); |
276 | if (err) |
277 | goto err_lpo_clk_disable; |
278 | } |
279 | |
280 | err = dev->set_shutdown(dev, powered); |
281 | if (err) |
282 | goto err_txco_clk_disable; |
283 | |
284 | err = dev->set_device_wakeup(dev, powered); |
285 | if (err) |
286 | goto err_revert_shutdown; |
287 | |
288 | if (!powered && dev->res_enabled) { |
289 | clk_disable_unprepare(clk: dev->txco_clk); |
290 | clk_disable_unprepare(clk: dev->lpo_clk); |
291 | |
292 | /* Intel Macs use bcm_apple_get_resources() and don't |
293 | * have regulator supplies configured. |
294 | */ |
295 | if (dev->supplies[0].supply) |
296 | regulator_bulk_disable(BCM_NUM_SUPPLIES, |
297 | consumers: dev->supplies); |
298 | } |
299 | |
300 | /* wait for device to power on and come out of reset */ |
301 | usleep_range(min: 100000, max: 120000); |
302 | |
303 | dev->res_enabled = powered; |
304 | |
305 | return 0; |
306 | |
307 | err_revert_shutdown: |
308 | dev->set_shutdown(dev, !powered); |
309 | err_txco_clk_disable: |
310 | if (powered && !dev->res_enabled) |
311 | clk_disable_unprepare(clk: dev->txco_clk); |
312 | err_lpo_clk_disable: |
313 | if (powered && !dev->res_enabled) |
314 | clk_disable_unprepare(clk: dev->lpo_clk); |
315 | err_regulator_disable: |
316 | if (powered && !dev->res_enabled) |
317 | regulator_bulk_disable(BCM_NUM_SUPPLIES, consumers: dev->supplies); |
318 | return err; |
319 | } |
320 | |
321 | #ifdef CONFIG_PM |
322 | static irqreturn_t bcm_host_wake(int irq, void *data) |
323 | { |
324 | struct bcm_device *bdev = data; |
325 | |
326 | bt_dev_dbg(bdev, "Host wake IRQ" ); |
327 | |
328 | pm_runtime_get(dev: bdev->dev); |
329 | pm_runtime_mark_last_busy(dev: bdev->dev); |
330 | pm_runtime_put_autosuspend(dev: bdev->dev); |
331 | |
332 | return IRQ_HANDLED; |
333 | } |
334 | |
335 | static int bcm_request_irq(struct bcm_data *bcm) |
336 | { |
337 | struct bcm_device *bdev = bcm->dev; |
338 | int err; |
339 | |
340 | mutex_lock(&bcm_device_lock); |
341 | if (!bcm_device_exists(device: bdev)) { |
342 | err = -ENODEV; |
343 | goto unlock; |
344 | } |
345 | |
346 | if (bdev->irq <= 0) { |
347 | err = -EOPNOTSUPP; |
348 | goto unlock; |
349 | } |
350 | |
351 | err = devm_request_irq(dev: bdev->dev, irq: bdev->irq, handler: bcm_host_wake, |
352 | irqflags: bdev->irq_active_low ? IRQF_TRIGGER_FALLING : |
353 | IRQF_TRIGGER_RISING, |
354 | devname: "host_wake" , dev_id: bdev); |
355 | if (err) { |
356 | bdev->irq = err; |
357 | goto unlock; |
358 | } |
359 | |
360 | bdev->irq_acquired = true; |
361 | |
362 | device_init_wakeup(dev: bdev->dev, enable: true); |
363 | |
364 | pm_runtime_set_autosuspend_delay(dev: bdev->dev, |
365 | BCM_AUTOSUSPEND_DELAY); |
366 | pm_runtime_use_autosuspend(dev: bdev->dev); |
367 | pm_runtime_set_active(dev: bdev->dev); |
368 | pm_runtime_enable(dev: bdev->dev); |
369 | |
370 | unlock: |
371 | mutex_unlock(lock: &bcm_device_lock); |
372 | |
373 | return err; |
374 | } |
375 | |
376 | static const struct bcm_set_sleep_mode default_sleep_params = { |
377 | .sleep_mode = 1, /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */ |
378 | .idle_host = 2, /* idle threshold HOST, in 300ms */ |
379 | .idle_dev = 2, /* idle threshold device, in 300ms */ |
380 | .bt_wake_active = 1, /* BT_WAKE active mode: 1 = high, 0 = low */ |
381 | .host_wake_active = 0, /* HOST_WAKE active mode: 1 = high, 0 = low */ |
382 | .allow_host_sleep = 1, /* Allow host sleep in SCO flag */ |
383 | .combine_modes = 1, /* Combine sleep and LPM flag */ |
384 | .tristate_control = 0, /* Allow tri-state control of UART tx flag */ |
385 | /* Irrelevant USB flags */ |
386 | .usb_auto_sleep = 0, |
387 | .usb_resume_timeout = 0, |
388 | .break_to_host = 0, |
389 | .pulsed_host_wake = 1, |
390 | }; |
391 | |
392 | static int bcm_setup_sleep(struct hci_uart *hu) |
393 | { |
394 | struct bcm_data *bcm = hu->priv; |
395 | struct sk_buff *skb; |
396 | struct bcm_set_sleep_mode sleep_params = default_sleep_params; |
397 | |
398 | sleep_params.host_wake_active = !bcm->dev->irq_active_low; |
399 | |
400 | skb = __hci_cmd_sync(hdev: hu->hdev, opcode: 0xfc27, plen: sizeof(sleep_params), |
401 | param: &sleep_params, HCI_INIT_TIMEOUT); |
402 | if (IS_ERR(ptr: skb)) { |
403 | int err = PTR_ERR(ptr: skb); |
404 | bt_dev_err(hu->hdev, "Sleep VSC failed (%d)" , err); |
405 | return err; |
406 | } |
407 | kfree_skb(skb); |
408 | |
409 | bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded" ); |
410 | |
411 | return 0; |
412 | } |
413 | #else |
414 | static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; } |
415 | static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; } |
416 | #endif |
417 | |
418 | static int bcm_set_diag(struct hci_dev *hdev, bool enable) |
419 | { |
420 | struct hci_uart *hu = hci_get_drvdata(hdev); |
421 | struct bcm_data *bcm = hu->priv; |
422 | struct sk_buff *skb; |
423 | |
424 | if (!test_bit(HCI_RUNNING, &hdev->flags)) |
425 | return -ENETDOWN; |
426 | |
427 | skb = bt_skb_alloc(len: 3, GFP_KERNEL); |
428 | if (!skb) |
429 | return -ENOMEM; |
430 | |
431 | skb_put_u8(skb, BCM_LM_DIAG_PKT); |
432 | skb_put_u8(skb, val: 0xf0); |
433 | skb_put_u8(skb, val: enable); |
434 | |
435 | skb_queue_tail(list: &bcm->txq, newsk: skb); |
436 | hci_uart_tx_wakeup(hu); |
437 | |
438 | return 0; |
439 | } |
440 | |
441 | static int bcm_open(struct hci_uart *hu) |
442 | { |
443 | struct bcm_data *bcm; |
444 | struct list_head *p; |
445 | int err; |
446 | |
447 | bt_dev_dbg(hu->hdev, "hu %p" , hu); |
448 | |
449 | if (!hci_uart_has_flow_control(hu)) |
450 | return -EOPNOTSUPP; |
451 | |
452 | bcm = kzalloc(size: sizeof(*bcm), GFP_KERNEL); |
453 | if (!bcm) |
454 | return -ENOMEM; |
455 | |
456 | skb_queue_head_init(list: &bcm->txq); |
457 | |
458 | hu->priv = bcm; |
459 | |
460 | mutex_lock(&bcm_device_lock); |
461 | |
462 | if (hu->serdev) { |
463 | bcm->dev = serdev_device_get_drvdata(serdev: hu->serdev); |
464 | goto out; |
465 | } |
466 | |
467 | if (!hu->tty->dev) |
468 | goto out; |
469 | |
470 | list_for_each(p, &bcm_device_list) { |
471 | struct bcm_device *dev = list_entry(p, struct bcm_device, list); |
472 | |
473 | /* Retrieve saved bcm_device based on parent of the |
474 | * platform device (saved during device probe) and |
475 | * parent of tty device used by hci_uart |
476 | */ |
477 | if (hu->tty->dev->parent == dev->dev->parent) { |
478 | bcm->dev = dev; |
479 | #ifdef CONFIG_PM |
480 | dev->hu = hu; |
481 | #endif |
482 | break; |
483 | } |
484 | } |
485 | |
486 | out: |
487 | if (bcm->dev) { |
488 | if (bcm->dev->use_autobaud_mode) |
489 | hci_uart_set_flow_control(hu, enable: false); /* Assert BT_UART_CTS_N */ |
490 | else if (bcm->dev->drive_rts_on_open) |
491 | hci_uart_set_flow_control(hu, enable: true); |
492 | |
493 | if (bcm->dev->use_autobaud_mode && bcm->dev->max_autobaud_speed) |
494 | hu->init_speed = min(bcm->dev->oper_speed, bcm->dev->max_autobaud_speed); |
495 | else |
496 | hu->init_speed = bcm->dev->init_speed; |
497 | |
498 | /* If oper_speed is set, ldisc/serdev will set the baudrate |
499 | * before calling setup() |
500 | */ |
501 | if (!bcm->dev->no_early_set_baudrate && !bcm->dev->use_autobaud_mode) |
502 | hu->oper_speed = bcm->dev->oper_speed; |
503 | |
504 | err = bcm_gpio_set_power(dev: bcm->dev, powered: true); |
505 | |
506 | if (bcm->dev->drive_rts_on_open) |
507 | hci_uart_set_flow_control(hu, enable: false); |
508 | |
509 | if (err) |
510 | goto err_unset_hu; |
511 | } |
512 | |
513 | mutex_unlock(lock: &bcm_device_lock); |
514 | return 0; |
515 | |
516 | err_unset_hu: |
517 | #ifdef CONFIG_PM |
518 | if (!hu->serdev) |
519 | bcm->dev->hu = NULL; |
520 | #endif |
521 | mutex_unlock(lock: &bcm_device_lock); |
522 | hu->priv = NULL; |
523 | kfree(objp: bcm); |
524 | return err; |
525 | } |
526 | |
527 | static int bcm_close(struct hci_uart *hu) |
528 | { |
529 | struct bcm_data *bcm = hu->priv; |
530 | struct bcm_device *bdev = NULL; |
531 | int err; |
532 | |
533 | bt_dev_dbg(hu->hdev, "hu %p" , hu); |
534 | |
535 | /* Protect bcm->dev against removal of the device or driver */ |
536 | mutex_lock(&bcm_device_lock); |
537 | |
538 | if (hu->serdev) { |
539 | bdev = serdev_device_get_drvdata(serdev: hu->serdev); |
540 | } else if (bcm_device_exists(device: bcm->dev)) { |
541 | bdev = bcm->dev; |
542 | #ifdef CONFIG_PM |
543 | bdev->hu = NULL; |
544 | #endif |
545 | } |
546 | |
547 | if (bdev) { |
548 | if (IS_ENABLED(CONFIG_PM) && bdev->irq_acquired) { |
549 | devm_free_irq(dev: bdev->dev, irq: bdev->irq, dev_id: bdev); |
550 | device_init_wakeup(dev: bdev->dev, enable: false); |
551 | pm_runtime_disable(dev: bdev->dev); |
552 | } |
553 | |
554 | err = bcm_gpio_set_power(dev: bdev, powered: false); |
555 | if (err) |
556 | bt_dev_err(hu->hdev, "Failed to power down" ); |
557 | else |
558 | pm_runtime_set_suspended(dev: bdev->dev); |
559 | } |
560 | mutex_unlock(lock: &bcm_device_lock); |
561 | |
562 | skb_queue_purge(list: &bcm->txq); |
563 | kfree_skb(skb: bcm->rx_skb); |
564 | kfree(objp: bcm); |
565 | |
566 | hu->priv = NULL; |
567 | return 0; |
568 | } |
569 | |
570 | static int bcm_flush(struct hci_uart *hu) |
571 | { |
572 | struct bcm_data *bcm = hu->priv; |
573 | |
574 | bt_dev_dbg(hu->hdev, "hu %p" , hu); |
575 | |
576 | skb_queue_purge(list: &bcm->txq); |
577 | |
578 | return 0; |
579 | } |
580 | |
581 | static int bcm_setup(struct hci_uart *hu) |
582 | { |
583 | struct bcm_data *bcm = hu->priv; |
584 | bool fw_load_done = false; |
585 | bool use_autobaud_mode = (bcm->dev ? bcm->dev->use_autobaud_mode : 0); |
586 | unsigned int speed; |
587 | int err; |
588 | |
589 | bt_dev_dbg(hu->hdev, "hu %p" , hu); |
590 | |
591 | hu->hdev->set_diag = bcm_set_diag; |
592 | hu->hdev->set_bdaddr = btbcm_set_bdaddr; |
593 | |
594 | err = btbcm_initialize(hdev: hu->hdev, fw_load_done: &fw_load_done, use_autobaud_mode); |
595 | if (err) |
596 | return err; |
597 | |
598 | if (!fw_load_done) |
599 | return 0; |
600 | |
601 | /* Init speed if any */ |
602 | if (bcm->dev && bcm->dev->init_speed) |
603 | speed = bcm->dev->init_speed; |
604 | else if (hu->proto->init_speed) |
605 | speed = hu->proto->init_speed; |
606 | else |
607 | speed = 0; |
608 | |
609 | if (speed) |
610 | host_set_baudrate(hu, speed); |
611 | |
612 | /* Operational speed if any */ |
613 | if (hu->oper_speed) |
614 | speed = hu->oper_speed; |
615 | else if (bcm->dev && bcm->dev->oper_speed) |
616 | speed = bcm->dev->oper_speed; |
617 | else if (hu->proto->oper_speed) |
618 | speed = hu->proto->oper_speed; |
619 | else |
620 | speed = 0; |
621 | |
622 | if (speed) { |
623 | err = bcm_set_baudrate(hu, speed); |
624 | if (!err) |
625 | host_set_baudrate(hu, speed); |
626 | } |
627 | |
628 | /* PCM parameters if provided */ |
629 | if (bcm->dev && bcm->dev->pcm_int_params[0] != 0xff) { |
630 | struct bcm_set_pcm_int_params params; |
631 | |
632 | btbcm_read_pcm_int_params(hdev: hu->hdev, params: ¶ms); |
633 | |
634 | memcpy(¶ms, bcm->dev->pcm_int_params, 5); |
635 | btbcm_write_pcm_int_params(hdev: hu->hdev, params: ¶ms); |
636 | } |
637 | |
638 | err = btbcm_finalize(hdev: hu->hdev, fw_load_done: &fw_load_done, use_autobaud_mode); |
639 | if (err) |
640 | return err; |
641 | |
642 | /* Some devices ship with the controller default address. |
643 | * Allow the bootloader to set a valid address through the |
644 | * device tree. |
645 | */ |
646 | if (test_bit(HCI_QUIRK_INVALID_BDADDR, &hu->hdev->quirks)) |
647 | set_bit(nr: HCI_QUIRK_USE_BDADDR_PROPERTY, addr: &hu->hdev->quirks); |
648 | |
649 | if (!bcm_request_irq(bcm)) |
650 | err = bcm_setup_sleep(hu); |
651 | |
652 | return err; |
653 | } |
654 | |
655 | #define BCM_RECV_LM_DIAG \ |
656 | .type = BCM_LM_DIAG_PKT, \ |
657 | .hlen = BCM_LM_DIAG_SIZE, \ |
658 | .loff = 0, \ |
659 | .lsize = 0, \ |
660 | .maxlen = BCM_LM_DIAG_SIZE |
661 | |
662 | #define BCM_RECV_NULL \ |
663 | .type = BCM_NULL_PKT, \ |
664 | .hlen = BCM_NULL_SIZE, \ |
665 | .loff = 0, \ |
666 | .lsize = 0, \ |
667 | .maxlen = BCM_NULL_SIZE |
668 | |
669 | #define BCM_RECV_TYPE49 \ |
670 | .type = BCM_TYPE49_PKT, \ |
671 | .hlen = BCM_TYPE49_SIZE, \ |
672 | .loff = 0, \ |
673 | .lsize = 0, \ |
674 | .maxlen = BCM_TYPE49_SIZE |
675 | |
676 | #define BCM_RECV_TYPE52 \ |
677 | .type = BCM_TYPE52_PKT, \ |
678 | .hlen = BCM_TYPE52_SIZE, \ |
679 | .loff = 0, \ |
680 | .lsize = 0, \ |
681 | .maxlen = BCM_TYPE52_SIZE |
682 | |
683 | static const struct h4_recv_pkt bcm_recv_pkts[] = { |
684 | { H4_RECV_ACL, .recv = hci_recv_frame }, |
685 | { H4_RECV_SCO, .recv = hci_recv_frame }, |
686 | { H4_RECV_EVENT, .recv = hci_recv_frame }, |
687 | { H4_RECV_ISO, .recv = hci_recv_frame }, |
688 | { BCM_RECV_LM_DIAG, .recv = hci_recv_diag }, |
689 | { BCM_RECV_NULL, .recv = hci_recv_diag }, |
690 | { BCM_RECV_TYPE49, .recv = hci_recv_diag }, |
691 | { BCM_RECV_TYPE52, .recv = hci_recv_diag }, |
692 | }; |
693 | |
694 | static int bcm_recv(struct hci_uart *hu, const void *data, int count) |
695 | { |
696 | struct bcm_data *bcm = hu->priv; |
697 | |
698 | if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) |
699 | return -EUNATCH; |
700 | |
701 | bcm->rx_skb = h4_recv_buf(hdev: hu->hdev, skb: bcm->rx_skb, buffer: data, count, |
702 | pkts: bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts)); |
703 | if (IS_ERR(ptr: bcm->rx_skb)) { |
704 | int err = PTR_ERR(ptr: bcm->rx_skb); |
705 | bt_dev_err(hu->hdev, "Frame reassembly failed (%d)" , err); |
706 | bcm->rx_skb = NULL; |
707 | return err; |
708 | } else if (!bcm->rx_skb) { |
709 | /* Delay auto-suspend when receiving completed packet */ |
710 | mutex_lock(&bcm_device_lock); |
711 | if (bcm->dev && bcm_device_exists(device: bcm->dev)) { |
712 | pm_runtime_get(dev: bcm->dev->dev); |
713 | pm_runtime_mark_last_busy(dev: bcm->dev->dev); |
714 | pm_runtime_put_autosuspend(dev: bcm->dev->dev); |
715 | } |
716 | mutex_unlock(lock: &bcm_device_lock); |
717 | } |
718 | |
719 | return count; |
720 | } |
721 | |
722 | static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb) |
723 | { |
724 | struct bcm_data *bcm = hu->priv; |
725 | |
726 | bt_dev_dbg(hu->hdev, "hu %p skb %p" , hu, skb); |
727 | |
728 | /* Prepend skb with frame type */ |
729 | memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); |
730 | skb_queue_tail(list: &bcm->txq, newsk: skb); |
731 | |
732 | return 0; |
733 | } |
734 | |
735 | static struct sk_buff *bcm_dequeue(struct hci_uart *hu) |
736 | { |
737 | struct bcm_data *bcm = hu->priv; |
738 | struct sk_buff *skb = NULL; |
739 | struct bcm_device *bdev = NULL; |
740 | |
741 | mutex_lock(&bcm_device_lock); |
742 | |
743 | if (bcm_device_exists(device: bcm->dev)) { |
744 | bdev = bcm->dev; |
745 | pm_runtime_get_sync(dev: bdev->dev); |
746 | /* Shall be resumed here */ |
747 | } |
748 | |
749 | skb = skb_dequeue(list: &bcm->txq); |
750 | |
751 | if (bdev) { |
752 | pm_runtime_mark_last_busy(dev: bdev->dev); |
753 | pm_runtime_put_autosuspend(dev: bdev->dev); |
754 | } |
755 | |
756 | mutex_unlock(lock: &bcm_device_lock); |
757 | |
758 | return skb; |
759 | } |
760 | |
761 | #ifdef CONFIG_PM |
762 | static int bcm_suspend_device(struct device *dev) |
763 | { |
764 | struct bcm_device *bdev = dev_get_drvdata(dev); |
765 | int err; |
766 | |
767 | bt_dev_dbg(bdev, "" ); |
768 | |
769 | if (!bdev->is_suspended && bdev->hu) { |
770 | hci_uart_set_flow_control(hu: bdev->hu, enable: true); |
771 | |
772 | /* Once this returns, driver suspends BT via GPIO */ |
773 | bdev->is_suspended = true; |
774 | } |
775 | |
776 | /* Suspend the device */ |
777 | err = bdev->set_device_wakeup(bdev, false); |
778 | if (err) { |
779 | if (bdev->is_suspended && bdev->hu) { |
780 | bdev->is_suspended = false; |
781 | hci_uart_set_flow_control(hu: bdev->hu, enable: false); |
782 | } |
783 | return -EBUSY; |
784 | } |
785 | |
786 | bt_dev_dbg(bdev, "suspend, delaying 15 ms" ); |
787 | msleep(msecs: 15); |
788 | |
789 | return 0; |
790 | } |
791 | |
792 | static int bcm_resume_device(struct device *dev) |
793 | { |
794 | struct bcm_device *bdev = dev_get_drvdata(dev); |
795 | int err; |
796 | |
797 | bt_dev_dbg(bdev, "" ); |
798 | |
799 | err = bdev->set_device_wakeup(bdev, true); |
800 | if (err) { |
801 | dev_err(dev, "Failed to power up\n" ); |
802 | return err; |
803 | } |
804 | |
805 | bt_dev_dbg(bdev, "resume, delaying 15 ms" ); |
806 | msleep(msecs: 15); |
807 | |
808 | /* When this executes, the device has woken up already */ |
809 | if (bdev->is_suspended && bdev->hu) { |
810 | bdev->is_suspended = false; |
811 | |
812 | hci_uart_set_flow_control(hu: bdev->hu, enable: false); |
813 | } |
814 | |
815 | return 0; |
816 | } |
817 | #endif |
818 | |
819 | #ifdef CONFIG_PM_SLEEP |
820 | /* suspend callback */ |
821 | static int bcm_suspend(struct device *dev) |
822 | { |
823 | struct bcm_device *bdev = dev_get_drvdata(dev); |
824 | int error; |
825 | |
826 | bt_dev_dbg(bdev, "suspend: is_suspended %d" , bdev->is_suspended); |
827 | |
828 | /* |
829 | * When used with a device instantiated as platform_device, bcm_suspend |
830 | * can be called at any time as long as the platform device is bound, |
831 | * so it should use bcm_device_lock to protect access to hci_uart |
832 | * and device_wake-up GPIO. |
833 | */ |
834 | mutex_lock(&bcm_device_lock); |
835 | |
836 | if (!bdev->hu) |
837 | goto unlock; |
838 | |
839 | if (pm_runtime_active(dev)) |
840 | bcm_suspend_device(dev); |
841 | |
842 | if (device_may_wakeup(dev) && bdev->irq > 0) { |
843 | error = enable_irq_wake(irq: bdev->irq); |
844 | if (!error) |
845 | bt_dev_dbg(bdev, "BCM irq: enabled" ); |
846 | } |
847 | |
848 | unlock: |
849 | mutex_unlock(lock: &bcm_device_lock); |
850 | |
851 | return 0; |
852 | } |
853 | |
854 | /* resume callback */ |
855 | static int bcm_resume(struct device *dev) |
856 | { |
857 | struct bcm_device *bdev = dev_get_drvdata(dev); |
858 | int err = 0; |
859 | |
860 | bt_dev_dbg(bdev, "resume: is_suspended %d" , bdev->is_suspended); |
861 | |
862 | /* |
863 | * When used with a device instantiated as platform_device, bcm_resume |
864 | * can be called at any time as long as platform device is bound, |
865 | * so it should use bcm_device_lock to protect access to hci_uart |
866 | * and device_wake-up GPIO. |
867 | */ |
868 | mutex_lock(&bcm_device_lock); |
869 | |
870 | if (!bdev->hu) |
871 | goto unlock; |
872 | |
873 | if (device_may_wakeup(dev) && bdev->irq > 0) { |
874 | disable_irq_wake(irq: bdev->irq); |
875 | bt_dev_dbg(bdev, "BCM irq: disabled" ); |
876 | } |
877 | |
878 | err = bcm_resume_device(dev); |
879 | |
880 | unlock: |
881 | mutex_unlock(lock: &bcm_device_lock); |
882 | |
883 | if (!err) { |
884 | pm_runtime_disable(dev); |
885 | pm_runtime_set_active(dev); |
886 | pm_runtime_enable(dev); |
887 | } |
888 | |
889 | return 0; |
890 | } |
891 | #endif |
892 | |
893 | /* Some firmware reports an IRQ which does not work (wrong pin in fw table?) */ |
894 | static struct gpiod_lookup_table irq_on_int33fc02_pin17_gpios = { |
895 | .dev_id = "serial0-0" , |
896 | .table = { |
897 | GPIO_LOOKUP("INT33FC:02" , 17, "host-wakeup-alt" , GPIO_ACTIVE_HIGH), |
898 | { } |
899 | }, |
900 | }; |
901 | |
902 | static const struct dmi_system_id bcm_broken_irq_dmi_table[] = { |
903 | { |
904 | .ident = "Acer Iconia One 7 B1-750" , |
905 | .matches = { |
906 | DMI_MATCH(DMI_SYS_VENDOR, "Insyde" ), |
907 | DMI_MATCH(DMI_PRODUCT_NAME, "VESPA2" ), |
908 | }, |
909 | .driver_data = &irq_on_int33fc02_pin17_gpios, |
910 | }, |
911 | { |
912 | .ident = "Asus TF103C" , |
913 | .matches = { |
914 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC." ), |
915 | DMI_MATCH(DMI_PRODUCT_NAME, "TF103C" ), |
916 | }, |
917 | .driver_data = &irq_on_int33fc02_pin17_gpios, |
918 | }, |
919 | { |
920 | .ident = "Lenovo Yoga Tablet 2 830F/L / 1050F/L" , |
921 | .matches = { |
922 | DMI_MATCH(DMI_SYS_VENDOR, "Intel Corp." ), |
923 | DMI_MATCH(DMI_PRODUCT_NAME, "VALLEYVIEW C0 PLATFORM" ), |
924 | DMI_MATCH(DMI_BOARD_NAME, "BYT-T FFD8" ), |
925 | /* Partial match on beginning of BIOS version */ |
926 | DMI_MATCH(DMI_BIOS_VERSION, "BLADE_21" ), |
927 | }, |
928 | .driver_data = &irq_on_int33fc02_pin17_gpios, |
929 | }, |
930 | { |
931 | .ident = "Meegopad T08" , |
932 | .matches = { |
933 | DMI_EXACT_MATCH(DMI_BOARD_VENDOR, |
934 | "To be filled by OEM." ), |
935 | DMI_EXACT_MATCH(DMI_BOARD_NAME, "T3 MRD" ), |
936 | DMI_EXACT_MATCH(DMI_BOARD_VERSION, "V1.1" ), |
937 | }, |
938 | }, |
939 | { } |
940 | }; |
941 | |
942 | #ifdef CONFIG_ACPI |
943 | static const struct acpi_gpio_params first_gpio = { 0, 0, false }; |
944 | static const struct acpi_gpio_params second_gpio = { 1, 0, false }; |
945 | static const struct acpi_gpio_params third_gpio = { 2, 0, false }; |
946 | |
947 | static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = { |
948 | { "device-wakeup-gpios" , &first_gpio, 1 }, |
949 | { "shutdown-gpios" , &second_gpio, 1 }, |
950 | { "host-wakeup-gpios" , &third_gpio, 1 }, |
951 | { }, |
952 | }; |
953 | |
954 | static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = { |
955 | { "host-wakeup-gpios" , &first_gpio, 1 }, |
956 | { "device-wakeup-gpios" , &second_gpio, 1 }, |
957 | { "shutdown-gpios" , &third_gpio, 1 }, |
958 | { }, |
959 | }; |
960 | |
961 | static int bcm_resource(struct acpi_resource *ares, void *data) |
962 | { |
963 | struct bcm_device *dev = data; |
964 | struct acpi_resource_extended_irq *irq; |
965 | struct acpi_resource_gpio *gpio; |
966 | struct acpi_resource_uart_serialbus *sb; |
967 | |
968 | switch (ares->type) { |
969 | case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: |
970 | irq = &ares->data.extended_irq; |
971 | if (irq->polarity != ACPI_ACTIVE_LOW) |
972 | dev_info(dev->dev, "ACPI Interrupt resource is active-high, this is usually wrong, treating the IRQ as active-low\n" ); |
973 | dev->irq_active_low = true; |
974 | break; |
975 | |
976 | case ACPI_RESOURCE_TYPE_GPIO: |
977 | gpio = &ares->data.gpio; |
978 | if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) { |
979 | dev->gpio_int_idx = dev->gpio_count; |
980 | dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW; |
981 | } |
982 | dev->gpio_count++; |
983 | break; |
984 | |
985 | case ACPI_RESOURCE_TYPE_SERIAL_BUS: |
986 | sb = &ares->data.uart_serial_bus; |
987 | if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) { |
988 | dev->init_speed = sb->default_baud_rate; |
989 | dev->oper_speed = 4000000; |
990 | } |
991 | break; |
992 | |
993 | default: |
994 | break; |
995 | } |
996 | |
997 | return 0; |
998 | } |
999 | |
1000 | static int bcm_apple_set_device_wakeup(struct bcm_device *dev, bool awake) |
1001 | { |
1002 | if (ACPI_FAILURE(acpi_execute_simple_method(dev->btlp, NULL, !awake))) |
1003 | return -EIO; |
1004 | |
1005 | return 0; |
1006 | } |
1007 | |
1008 | static int bcm_apple_set_shutdown(struct bcm_device *dev, bool powered) |
1009 | { |
1010 | if (ACPI_FAILURE(acpi_evaluate_object(powered ? dev->btpu : dev->btpd, |
1011 | NULL, NULL, NULL))) |
1012 | return -EIO; |
1013 | |
1014 | return 0; |
1015 | } |
1016 | |
1017 | static int bcm_apple_get_resources(struct bcm_device *dev) |
1018 | { |
1019 | struct acpi_device *adev = ACPI_COMPANION(dev->dev); |
1020 | const union acpi_object *obj; |
1021 | |
1022 | if (!adev || |
1023 | ACPI_FAILURE(acpi_get_handle(adev->handle, "BTLP" , &dev->btlp)) || |
1024 | ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPU" , &dev->btpu)) || |
1025 | ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPD" , &dev->btpd))) |
1026 | return -ENODEV; |
1027 | |
1028 | if (!acpi_dev_get_property(adev, name: "baud" , ACPI_TYPE_BUFFER, obj: &obj) && |
1029 | obj->buffer.length == 8) |
1030 | dev->init_speed = *(u64 *)obj->buffer.pointer; |
1031 | |
1032 | dev->set_device_wakeup = bcm_apple_set_device_wakeup; |
1033 | dev->set_shutdown = bcm_apple_set_shutdown; |
1034 | |
1035 | return 0; |
1036 | } |
1037 | #else |
1038 | static inline int bcm_apple_get_resources(struct bcm_device *dev) |
1039 | { |
1040 | return -EOPNOTSUPP; |
1041 | } |
1042 | #endif /* CONFIG_ACPI */ |
1043 | |
1044 | static int bcm_gpio_set_device_wakeup(struct bcm_device *dev, bool awake) |
1045 | { |
1046 | gpiod_set_value_cansleep(desc: dev->device_wakeup, value: awake); |
1047 | return 0; |
1048 | } |
1049 | |
1050 | static int bcm_gpio_set_shutdown(struct bcm_device *dev, bool powered) |
1051 | { |
1052 | gpiod_set_value_cansleep(desc: dev->shutdown, value: powered); |
1053 | if (dev->reset) |
1054 | /* |
1055 | * The reset line is asserted on powerdown and deasserted |
1056 | * on poweron so the inverse of powered is used. Notice |
1057 | * that the GPIO line BT_RST_N needs to be specified as |
1058 | * active low in the device tree or similar system |
1059 | * description. |
1060 | */ |
1061 | gpiod_set_value_cansleep(desc: dev->reset, value: !powered); |
1062 | return 0; |
1063 | } |
1064 | |
1065 | /* Try a bunch of names for TXCO */ |
1066 | static struct clk *bcm_get_txco(struct device *dev) |
1067 | { |
1068 | struct clk *clk; |
1069 | |
1070 | /* New explicit name */ |
1071 | clk = devm_clk_get(dev, id: "txco" ); |
1072 | if (!IS_ERR(ptr: clk) || PTR_ERR(ptr: clk) == -EPROBE_DEFER) |
1073 | return clk; |
1074 | |
1075 | /* Deprecated name */ |
1076 | clk = devm_clk_get(dev, id: "extclk" ); |
1077 | if (!IS_ERR(ptr: clk) || PTR_ERR(ptr: clk) == -EPROBE_DEFER) |
1078 | return clk; |
1079 | |
1080 | /* Original code used no name at all */ |
1081 | return devm_clk_get(dev, NULL); |
1082 | } |
1083 | |
1084 | static int bcm_get_resources(struct bcm_device *dev) |
1085 | { |
1086 | const struct dmi_system_id *broken_irq_dmi_id; |
1087 | const char *irq_con_id = "host-wakeup" ; |
1088 | int err; |
1089 | |
1090 | dev->name = dev_name(dev: dev->dev); |
1091 | |
1092 | if (x86_apple_machine && !bcm_apple_get_resources(dev)) |
1093 | return 0; |
1094 | |
1095 | dev->txco_clk = bcm_get_txco(dev: dev->dev); |
1096 | |
1097 | /* Handle deferred probing */ |
1098 | if (dev->txco_clk == ERR_PTR(error: -EPROBE_DEFER)) |
1099 | return PTR_ERR(ptr: dev->txco_clk); |
1100 | |
1101 | /* Ignore all other errors as before */ |
1102 | if (IS_ERR(ptr: dev->txco_clk)) |
1103 | dev->txco_clk = NULL; |
1104 | |
1105 | dev->lpo_clk = devm_clk_get(dev: dev->dev, id: "lpo" ); |
1106 | if (dev->lpo_clk == ERR_PTR(error: -EPROBE_DEFER)) |
1107 | return PTR_ERR(ptr: dev->lpo_clk); |
1108 | |
1109 | if (IS_ERR(ptr: dev->lpo_clk)) |
1110 | dev->lpo_clk = NULL; |
1111 | |
1112 | /* Check if we accidentally fetched the lpo clock twice */ |
1113 | if (dev->lpo_clk && clk_is_match(p: dev->lpo_clk, q: dev->txco_clk)) { |
1114 | devm_clk_put(dev: dev->dev, clk: dev->txco_clk); |
1115 | dev->txco_clk = NULL; |
1116 | } |
1117 | |
1118 | dev->device_wakeup = devm_gpiod_get_optional(dev: dev->dev, con_id: "device-wakeup" , |
1119 | flags: GPIOD_OUT_LOW); |
1120 | if (IS_ERR(ptr: dev->device_wakeup)) |
1121 | return PTR_ERR(ptr: dev->device_wakeup); |
1122 | |
1123 | dev->shutdown = devm_gpiod_get_optional(dev: dev->dev, con_id: "shutdown" , |
1124 | flags: GPIOD_OUT_LOW); |
1125 | if (IS_ERR(ptr: dev->shutdown)) |
1126 | return PTR_ERR(ptr: dev->shutdown); |
1127 | |
1128 | dev->reset = devm_gpiod_get_optional(dev: dev->dev, con_id: "reset" , |
1129 | flags: GPIOD_OUT_LOW); |
1130 | if (IS_ERR(ptr: dev->reset)) |
1131 | return PTR_ERR(ptr: dev->reset); |
1132 | |
1133 | dev->set_device_wakeup = bcm_gpio_set_device_wakeup; |
1134 | dev->set_shutdown = bcm_gpio_set_shutdown; |
1135 | |
1136 | dev->supplies[0].supply = "vbat" ; |
1137 | dev->supplies[1].supply = "vddio" ; |
1138 | err = devm_regulator_bulk_get(dev: dev->dev, BCM_NUM_SUPPLIES, |
1139 | consumers: dev->supplies); |
1140 | if (err) |
1141 | return err; |
1142 | |
1143 | broken_irq_dmi_id = dmi_first_match(list: bcm_broken_irq_dmi_table); |
1144 | if (broken_irq_dmi_id && broken_irq_dmi_id->driver_data) { |
1145 | gpiod_add_lookup_table(table: broken_irq_dmi_id->driver_data); |
1146 | irq_con_id = "host-wakeup-alt" ; |
1147 | dev->irq_active_low = false; |
1148 | dev->irq = 0; |
1149 | } |
1150 | |
1151 | /* IRQ can be declared in ACPI table as Interrupt or GpioInt */ |
1152 | if (dev->irq <= 0) { |
1153 | struct gpio_desc *gpio; |
1154 | |
1155 | gpio = devm_gpiod_get_optional(dev: dev->dev, con_id: irq_con_id, flags: GPIOD_IN); |
1156 | if (IS_ERR(ptr: gpio)) |
1157 | return PTR_ERR(ptr: gpio); |
1158 | |
1159 | dev->irq = gpiod_to_irq(desc: gpio); |
1160 | } |
1161 | |
1162 | if (broken_irq_dmi_id) { |
1163 | if (broken_irq_dmi_id->driver_data) { |
1164 | gpiod_remove_lookup_table(table: broken_irq_dmi_id->driver_data); |
1165 | } else { |
1166 | dev_info(dev->dev, "%s: Has a broken IRQ config, disabling IRQ support / runtime-pm\n" , |
1167 | broken_irq_dmi_id->ident); |
1168 | dev->irq = 0; |
1169 | } |
1170 | } |
1171 | |
1172 | dev_dbg(dev->dev, "BCM irq: %d\n" , dev->irq); |
1173 | return 0; |
1174 | } |
1175 | |
1176 | #ifdef CONFIG_ACPI |
1177 | static int bcm_acpi_probe(struct bcm_device *dev) |
1178 | { |
1179 | LIST_HEAD(resources); |
1180 | const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios; |
1181 | struct resource_entry *entry; |
1182 | int ret; |
1183 | |
1184 | /* Retrieve UART ACPI info */ |
1185 | dev->gpio_int_idx = -1; |
1186 | ret = acpi_dev_get_resources(ACPI_COMPANION(dev->dev), |
1187 | list: &resources, preproc: bcm_resource, preproc_data: dev); |
1188 | if (ret < 0) |
1189 | return ret; |
1190 | |
1191 | resource_list_for_each_entry(entry, &resources) { |
1192 | if (resource_type(res: entry->res) == IORESOURCE_IRQ) { |
1193 | dev->irq = entry->res->start; |
1194 | break; |
1195 | } |
1196 | } |
1197 | acpi_dev_free_resource_list(list: &resources); |
1198 | |
1199 | /* If the DSDT uses an Interrupt resource for the IRQ, then there are |
1200 | * only 2 GPIO resources, we use the irq-last mapping for this, since |
1201 | * we already have an irq the 3th / last mapping will not be used. |
1202 | */ |
1203 | if (dev->irq) |
1204 | gpio_mapping = acpi_bcm_int_last_gpios; |
1205 | else if (dev->gpio_int_idx == 0) |
1206 | gpio_mapping = acpi_bcm_int_first_gpios; |
1207 | else if (dev->gpio_int_idx == 2) |
1208 | gpio_mapping = acpi_bcm_int_last_gpios; |
1209 | else |
1210 | dev_warn(dev->dev, "Unexpected ACPI gpio_int_idx: %d\n" , |
1211 | dev->gpio_int_idx); |
1212 | |
1213 | /* Warn if our expectations are not met. */ |
1214 | if (dev->gpio_count != (dev->irq ? 2 : 3)) |
1215 | dev_warn(dev->dev, "Unexpected number of ACPI GPIOs: %d\n" , |
1216 | dev->gpio_count); |
1217 | |
1218 | ret = devm_acpi_dev_add_driver_gpios(dev: dev->dev, gpios: gpio_mapping); |
1219 | if (ret) |
1220 | return ret; |
1221 | |
1222 | if (irq_polarity != -1) { |
1223 | dev->irq_active_low = irq_polarity; |
1224 | dev_warn(dev->dev, "Overwriting IRQ polarity to active %s by module-param\n" , |
1225 | dev->irq_active_low ? "low" : "high" ); |
1226 | } |
1227 | |
1228 | return 0; |
1229 | } |
1230 | #else |
1231 | static int bcm_acpi_probe(struct bcm_device *dev) |
1232 | { |
1233 | return -EINVAL; |
1234 | } |
1235 | #endif /* CONFIG_ACPI */ |
1236 | |
1237 | static int bcm_of_probe(struct bcm_device *bdev) |
1238 | { |
1239 | bdev->use_autobaud_mode = device_property_read_bool(dev: bdev->dev, |
1240 | propname: "brcm,requires-autobaud-mode" ); |
1241 | device_property_read_u32(dev: bdev->dev, propname: "max-speed" , val: &bdev->oper_speed); |
1242 | device_property_read_u8_array(dev: bdev->dev, propname: "brcm,bt-pcm-int-params" , |
1243 | val: bdev->pcm_int_params, nval: 5); |
1244 | bdev->irq = of_irq_get_byname(dev: bdev->dev->of_node, name: "host-wakeup" ); |
1245 | bdev->irq_active_low = irq_get_trigger_type(irq: bdev->irq) |
1246 | & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW); |
1247 | return 0; |
1248 | } |
1249 | |
1250 | static int bcm_probe(struct platform_device *pdev) |
1251 | { |
1252 | struct bcm_device *dev; |
1253 | int ret; |
1254 | |
1255 | dev = devm_kzalloc(dev: &pdev->dev, size: sizeof(*dev), GFP_KERNEL); |
1256 | if (!dev) |
1257 | return -ENOMEM; |
1258 | |
1259 | dev->dev = &pdev->dev; |
1260 | |
1261 | ret = platform_get_irq(pdev, 0); |
1262 | if (ret < 0) |
1263 | return ret; |
1264 | |
1265 | dev->irq = ret; |
1266 | |
1267 | /* Initialize routing field to an unused value */ |
1268 | dev->pcm_int_params[0] = 0xff; |
1269 | |
1270 | if (has_acpi_companion(dev: &pdev->dev)) { |
1271 | ret = bcm_acpi_probe(dev); |
1272 | if (ret) |
1273 | return ret; |
1274 | } |
1275 | |
1276 | ret = bcm_get_resources(dev); |
1277 | if (ret) |
1278 | return ret; |
1279 | |
1280 | platform_set_drvdata(pdev, data: dev); |
1281 | |
1282 | dev_info(&pdev->dev, "%s device registered.\n" , dev->name); |
1283 | |
1284 | /* Place this instance on the device list */ |
1285 | mutex_lock(&bcm_device_lock); |
1286 | list_add_tail(new: &dev->list, head: &bcm_device_list); |
1287 | mutex_unlock(lock: &bcm_device_lock); |
1288 | |
1289 | ret = bcm_gpio_set_power(dev, powered: false); |
1290 | if (ret) |
1291 | dev_err(&pdev->dev, "Failed to power down\n" ); |
1292 | |
1293 | return 0; |
1294 | } |
1295 | |
1296 | static int bcm_remove(struct platform_device *pdev) |
1297 | { |
1298 | struct bcm_device *dev = platform_get_drvdata(pdev); |
1299 | |
1300 | mutex_lock(&bcm_device_lock); |
1301 | list_del(entry: &dev->list); |
1302 | mutex_unlock(lock: &bcm_device_lock); |
1303 | |
1304 | dev_info(&pdev->dev, "%s device unregistered.\n" , dev->name); |
1305 | |
1306 | return 0; |
1307 | } |
1308 | |
1309 | static const struct hci_uart_proto bcm_proto = { |
1310 | .id = HCI_UART_BCM, |
1311 | .name = "Broadcom" , |
1312 | .manufacturer = 15, |
1313 | .init_speed = 115200, |
1314 | .open = bcm_open, |
1315 | .close = bcm_close, |
1316 | .flush = bcm_flush, |
1317 | .setup = bcm_setup, |
1318 | .set_baudrate = bcm_set_baudrate, |
1319 | .recv = bcm_recv, |
1320 | .enqueue = bcm_enqueue, |
1321 | .dequeue = bcm_dequeue, |
1322 | }; |
1323 | |
1324 | #ifdef CONFIG_ACPI |
1325 | |
1326 | /* bcm43430a0/a1 BT does not support 48MHz UART clock, limit to 2000000 baud */ |
1327 | static struct bcm_device_data bcm43430_device_data = { |
1328 | .max_speed = 2000000, |
1329 | }; |
1330 | |
1331 | static const struct acpi_device_id bcm_acpi_match[] = { |
1332 | { "BCM2E00" }, |
1333 | { "BCM2E01" }, |
1334 | { "BCM2E02" }, |
1335 | { "BCM2E03" }, |
1336 | { "BCM2E04" }, |
1337 | { "BCM2E05" }, |
1338 | { "BCM2E06" }, |
1339 | { "BCM2E07" }, |
1340 | { "BCM2E08" }, |
1341 | { "BCM2E09" }, |
1342 | { "BCM2E0A" }, |
1343 | { "BCM2E0B" }, |
1344 | { "BCM2E0C" }, |
1345 | { "BCM2E0D" }, |
1346 | { "BCM2E0E" }, |
1347 | { "BCM2E0F" }, |
1348 | { "BCM2E10" }, |
1349 | { "BCM2E11" }, |
1350 | { "BCM2E12" }, |
1351 | { "BCM2E13" }, |
1352 | { "BCM2E14" }, |
1353 | { "BCM2E15" }, |
1354 | { "BCM2E16" }, |
1355 | { "BCM2E17" }, |
1356 | { "BCM2E18" }, |
1357 | { "BCM2E19" }, |
1358 | { "BCM2E1A" }, |
1359 | { "BCM2E1B" }, |
1360 | { "BCM2E1C" }, |
1361 | { "BCM2E1D" }, |
1362 | { "BCM2E1F" }, |
1363 | { "BCM2E20" }, |
1364 | { "BCM2E21" }, |
1365 | { "BCM2E22" }, |
1366 | { "BCM2E23" }, |
1367 | { "BCM2E24" }, |
1368 | { "BCM2E25" }, |
1369 | { "BCM2E26" }, |
1370 | { "BCM2E27" }, |
1371 | { "BCM2E28" }, |
1372 | { "BCM2E29" }, |
1373 | { "BCM2E2A" }, |
1374 | { "BCM2E2B" }, |
1375 | { "BCM2E2C" }, |
1376 | { "BCM2E2D" }, |
1377 | { "BCM2E2E" }, |
1378 | { "BCM2E2F" }, |
1379 | { "BCM2E30" }, |
1380 | { "BCM2E31" }, |
1381 | { "BCM2E32" }, |
1382 | { "BCM2E33" }, |
1383 | { "BCM2E34" }, |
1384 | { "BCM2E35" }, |
1385 | { "BCM2E36" }, |
1386 | { "BCM2E37" }, |
1387 | { "BCM2E38" }, |
1388 | { "BCM2E39" }, |
1389 | { "BCM2E3A" }, |
1390 | { "BCM2E3B" }, |
1391 | { "BCM2E3C" }, |
1392 | { "BCM2E3D" }, |
1393 | { "BCM2E3E" }, |
1394 | { "BCM2E3F" }, |
1395 | { "BCM2E40" }, |
1396 | { "BCM2E41" }, |
1397 | { "BCM2E42" }, |
1398 | { "BCM2E43" }, |
1399 | { "BCM2E44" }, |
1400 | { "BCM2E45" }, |
1401 | { "BCM2E46" }, |
1402 | { "BCM2E47" }, |
1403 | { "BCM2E48" }, |
1404 | { "BCM2E49" }, |
1405 | { "BCM2E4A" }, |
1406 | { "BCM2E4B" }, |
1407 | { "BCM2E4C" }, |
1408 | { "BCM2E4D" }, |
1409 | { "BCM2E4E" }, |
1410 | { "BCM2E4F" }, |
1411 | { "BCM2E50" }, |
1412 | { "BCM2E51" }, |
1413 | { "BCM2E52" }, |
1414 | { "BCM2E53" }, |
1415 | { "BCM2E54" }, |
1416 | { "BCM2E55" }, |
1417 | { "BCM2E56" }, |
1418 | { "BCM2E57" }, |
1419 | { "BCM2E58" }, |
1420 | { "BCM2E59" }, |
1421 | { "BCM2E5A" }, |
1422 | { "BCM2E5B" }, |
1423 | { "BCM2E5C" }, |
1424 | { "BCM2E5D" }, |
1425 | { "BCM2E5E" }, |
1426 | { "BCM2E5F" }, |
1427 | { "BCM2E60" }, |
1428 | { "BCM2E61" }, |
1429 | { "BCM2E62" }, |
1430 | { "BCM2E63" }, |
1431 | { "BCM2E64" }, |
1432 | { "BCM2E65" }, |
1433 | { "BCM2E66" }, |
1434 | { "BCM2E67" }, |
1435 | { "BCM2E68" }, |
1436 | { "BCM2E69" }, |
1437 | { "BCM2E6B" }, |
1438 | { "BCM2E6D" }, |
1439 | { "BCM2E6E" }, |
1440 | { "BCM2E6F" }, |
1441 | { "BCM2E70" }, |
1442 | { "BCM2E71" }, |
1443 | { "BCM2E72" }, |
1444 | { "BCM2E73" }, |
1445 | { "BCM2E74" , (long)&bcm43430_device_data }, |
1446 | { "BCM2E75" , (long)&bcm43430_device_data }, |
1447 | { "BCM2E76" }, |
1448 | { "BCM2E77" }, |
1449 | { "BCM2E78" }, |
1450 | { "BCM2E79" }, |
1451 | { "BCM2E7A" }, |
1452 | { "BCM2E7B" , (long)&bcm43430_device_data }, |
1453 | { "BCM2E7C" }, |
1454 | { "BCM2E7D" }, |
1455 | { "BCM2E7E" }, |
1456 | { "BCM2E7F" }, |
1457 | { "BCM2E80" , (long)&bcm43430_device_data }, |
1458 | { "BCM2E81" }, |
1459 | { "BCM2E82" }, |
1460 | { "BCM2E83" }, |
1461 | { "BCM2E84" }, |
1462 | { "BCM2E85" }, |
1463 | { "BCM2E86" }, |
1464 | { "BCM2E87" }, |
1465 | { "BCM2E88" }, |
1466 | { "BCM2E89" , (long)&bcm43430_device_data }, |
1467 | { "BCM2E8A" }, |
1468 | { "BCM2E8B" }, |
1469 | { "BCM2E8C" }, |
1470 | { "BCM2E8D" }, |
1471 | { "BCM2E8E" }, |
1472 | { "BCM2E90" }, |
1473 | { "BCM2E92" }, |
1474 | { "BCM2E93" }, |
1475 | { "BCM2E94" , (long)&bcm43430_device_data }, |
1476 | { "BCM2E95" }, |
1477 | { "BCM2E96" }, |
1478 | { "BCM2E97" }, |
1479 | { "BCM2E98" }, |
1480 | { "BCM2E99" , (long)&bcm43430_device_data }, |
1481 | { "BCM2E9A" }, |
1482 | { "BCM2E9B" , (long)&bcm43430_device_data }, |
1483 | { "BCM2E9C" }, |
1484 | { "BCM2E9D" }, |
1485 | { "BCM2E9F" , (long)&bcm43430_device_data }, |
1486 | { "BCM2EA0" }, |
1487 | { "BCM2EA1" }, |
1488 | { "BCM2EA2" , (long)&bcm43430_device_data }, |
1489 | { "BCM2EA3" , (long)&bcm43430_device_data }, |
1490 | { "BCM2EA4" }, |
1491 | { "BCM2EA5" }, |
1492 | { "BCM2EA6" }, |
1493 | { "BCM2EA7" }, |
1494 | { "BCM2EA8" }, |
1495 | { "BCM2EA9" }, |
1496 | { "BCM2EAA" , (long)&bcm43430_device_data }, |
1497 | { "BCM2EAB" , (long)&bcm43430_device_data }, |
1498 | { "BCM2EAC" , (long)&bcm43430_device_data }, |
1499 | { }, |
1500 | }; |
1501 | MODULE_DEVICE_TABLE(acpi, bcm_acpi_match); |
1502 | #endif |
1503 | |
1504 | /* suspend and resume callbacks */ |
1505 | static const struct dev_pm_ops bcm_pm_ops = { |
1506 | SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume) |
1507 | SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL) |
1508 | }; |
1509 | |
1510 | static struct platform_driver bcm_driver = { |
1511 | .probe = bcm_probe, |
1512 | .remove = bcm_remove, |
1513 | .driver = { |
1514 | .name = "hci_bcm" , |
1515 | .acpi_match_table = ACPI_PTR(bcm_acpi_match), |
1516 | .pm = &bcm_pm_ops, |
1517 | }, |
1518 | }; |
1519 | |
1520 | static int bcm_serdev_probe(struct serdev_device *serdev) |
1521 | { |
1522 | struct bcm_device *bcmdev; |
1523 | const struct bcm_device_data *data; |
1524 | int err; |
1525 | |
1526 | bcmdev = devm_kzalloc(dev: &serdev->dev, size: sizeof(*bcmdev), GFP_KERNEL); |
1527 | if (!bcmdev) |
1528 | return -ENOMEM; |
1529 | |
1530 | bcmdev->dev = &serdev->dev; |
1531 | #ifdef CONFIG_PM |
1532 | bcmdev->hu = &bcmdev->serdev_hu; |
1533 | #endif |
1534 | bcmdev->serdev_hu.serdev = serdev; |
1535 | serdev_device_set_drvdata(serdev, data: bcmdev); |
1536 | |
1537 | /* Initialize routing field to an unused value */ |
1538 | bcmdev->pcm_int_params[0] = 0xff; |
1539 | |
1540 | if (has_acpi_companion(dev: &serdev->dev)) |
1541 | err = bcm_acpi_probe(dev: bcmdev); |
1542 | else |
1543 | err = bcm_of_probe(bdev: bcmdev); |
1544 | if (err) |
1545 | return err; |
1546 | |
1547 | err = bcm_get_resources(dev: bcmdev); |
1548 | if (err) |
1549 | return err; |
1550 | |
1551 | if (!bcmdev->shutdown) { |
1552 | dev_warn(&serdev->dev, |
1553 | "No reset resource, using default baud rate\n" ); |
1554 | bcmdev->oper_speed = bcmdev->init_speed; |
1555 | } |
1556 | |
1557 | err = bcm_gpio_set_power(dev: bcmdev, powered: false); |
1558 | if (err) |
1559 | dev_err(&serdev->dev, "Failed to power down\n" ); |
1560 | |
1561 | data = device_get_match_data(dev: bcmdev->dev); |
1562 | if (data) { |
1563 | bcmdev->max_autobaud_speed = data->max_autobaud_speed; |
1564 | bcmdev->no_early_set_baudrate = data->no_early_set_baudrate; |
1565 | bcmdev->drive_rts_on_open = data->drive_rts_on_open; |
1566 | bcmdev->no_uart_clock_set = data->no_uart_clock_set; |
1567 | if (data->max_speed && bcmdev->oper_speed > data->max_speed) |
1568 | bcmdev->oper_speed = data->max_speed; |
1569 | } |
1570 | |
1571 | return hci_uart_register_device(hu: &bcmdev->serdev_hu, p: &bcm_proto); |
1572 | } |
1573 | |
1574 | static void bcm_serdev_remove(struct serdev_device *serdev) |
1575 | { |
1576 | struct bcm_device *bcmdev = serdev_device_get_drvdata(serdev); |
1577 | |
1578 | hci_uart_unregister_device(hu: &bcmdev->serdev_hu); |
1579 | } |
1580 | |
1581 | #ifdef CONFIG_OF |
1582 | static struct bcm_device_data bcm4354_device_data = { |
1583 | .no_early_set_baudrate = true, |
1584 | }; |
1585 | |
1586 | static struct bcm_device_data bcm43438_device_data = { |
1587 | .drive_rts_on_open = true, |
1588 | }; |
1589 | |
1590 | static struct bcm_device_data cyw4373a0_device_data = { |
1591 | .no_uart_clock_set = true, |
1592 | }; |
1593 | |
1594 | static struct bcm_device_data cyw55572_device_data = { |
1595 | .max_autobaud_speed = 921600, |
1596 | }; |
1597 | |
1598 | static const struct of_device_id bcm_bluetooth_of_match[] = { |
1599 | { .compatible = "brcm,bcm20702a1" }, |
1600 | { .compatible = "brcm,bcm4329-bt" }, |
1601 | { .compatible = "brcm,bcm4330-bt" }, |
1602 | { .compatible = "brcm,bcm4334-bt" }, |
1603 | { .compatible = "brcm,bcm4345c5" }, |
1604 | { .compatible = "brcm,bcm43430a0-bt" }, |
1605 | { .compatible = "brcm,bcm43430a1-bt" }, |
1606 | { .compatible = "brcm,bcm43438-bt" , .data = &bcm43438_device_data }, |
1607 | { .compatible = "brcm,bcm4349-bt" , .data = &bcm43438_device_data }, |
1608 | { .compatible = "brcm,bcm43540-bt" , .data = &bcm4354_device_data }, |
1609 | { .compatible = "brcm,bcm4335a0" }, |
1610 | { .compatible = "cypress,cyw4373a0-bt" , .data = &cyw4373a0_device_data }, |
1611 | { .compatible = "infineon,cyw55572-bt" , .data = &cyw55572_device_data }, |
1612 | { }, |
1613 | }; |
1614 | MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match); |
1615 | #endif |
1616 | |
1617 | static struct serdev_device_driver bcm_serdev_driver = { |
1618 | .probe = bcm_serdev_probe, |
1619 | .remove = bcm_serdev_remove, |
1620 | .driver = { |
1621 | .name = "hci_uart_bcm" , |
1622 | .of_match_table = of_match_ptr(bcm_bluetooth_of_match), |
1623 | .acpi_match_table = ACPI_PTR(bcm_acpi_match), |
1624 | .pm = &bcm_pm_ops, |
1625 | }, |
1626 | }; |
1627 | |
1628 | int __init bcm_init(void) |
1629 | { |
1630 | /* For now, we need to keep both platform device |
1631 | * driver (ACPI generated) and serdev driver (DT). |
1632 | */ |
1633 | platform_driver_register(&bcm_driver); |
1634 | serdev_device_driver_register(&bcm_serdev_driver); |
1635 | |
1636 | return hci_uart_register_proto(p: &bcm_proto); |
1637 | } |
1638 | |
1639 | int __exit bcm_deinit(void) |
1640 | { |
1641 | platform_driver_unregister(&bcm_driver); |
1642 | serdev_device_driver_unregister(sdrv: &bcm_serdev_driver); |
1643 | |
1644 | return hci_uart_unregister_proto(p: &bcm_proto); |
1645 | } |
1646 | |