Commit | Line | Data |
---|---|---|
1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
e9a2dd26 MH |
2 | /* |
3 | * | |
4 | * Bluetooth HCI UART driver for Broadcom devices | |
5 | * | |
6 | * Copyright (C) 2015 Intel Corporation | |
e9a2dd26 MH |
7 | */ |
8 | ||
9 | #include <linux/kernel.h> | |
10 | #include <linux/errno.h> | |
11 | #include <linux/skbuff.h> | |
18aeb444 | 12 | #include <linux/firmware.h> |
0395ffc1 FD |
13 | #include <linux/module.h> |
14 | #include <linux/acpi.h> | |
33cd149e LP |
15 | #include <linux/of.h> |
16 | #include <linux/property.h> | |
4c33162c | 17 | #include <linux/platform_data/x86/apple.h> |
0395ffc1 | 18 | #include <linux/platform_device.h> |
75d11676 | 19 | #include <linux/regulator/consumer.h> |
0395ffc1 FD |
20 | #include <linux/clk.h> |
21 | #include <linux/gpio/consumer.h> | |
22 | #include <linux/tty.h> | |
6cc4396c | 23 | #include <linux/interrupt.h> |
5cebdfea | 24 | #include <linux/dmi.h> |
e88ab30d | 25 | #include <linux/pm_runtime.h> |
33cd149e | 26 | #include <linux/serdev.h> |
e9a2dd26 MH |
27 | |
28 | #include <net/bluetooth/bluetooth.h> | |
29 | #include <net/bluetooth/hci_core.h> | |
30 | ||
bdd8818e | 31 | #include "btbcm.h" |
e9a2dd26 | 32 | #include "hci_uart.h" |
bdd8818e | 33 | |
01d5e44a MH |
34 | #define BCM_NULL_PKT 0x00 |
35 | #define BCM_NULL_SIZE 0 | |
36 | ||
94c58132 MH |
37 | #define BCM_LM_DIAG_PKT 0x07 |
38 | #define BCM_LM_DIAG_SIZE 63 | |
39 | ||
22bba805 JB |
40 | #define BCM_TYPE49_PKT 0x31 |
41 | #define BCM_TYPE49_SIZE 0 | |
42 | ||
43 | #define BCM_TYPE52_PKT 0x34 | |
44 | #define BCM_TYPE52_SIZE 0 | |
45 | ||
e88ab30d FD |
46 | #define BCM_AUTOSUSPEND_DELAY 5000 /* default autosleep delay */ |
47 | ||
75d11676 CYT |
48 | #define BCM_NUM_SUPPLIES 2 |
49 | ||
b7c2abac LW |
50 | /** |
51 | * struct bcm_device - device driver resources | |
52 | * @serdev_hu: HCI UART controller struct | |
53 | * @list: bcm_device_list node | |
54 | * @dev: physical UART slave | |
55 | * @name: device name logged by bt_dev_*() functions | |
56 | * @device_wakeup: BT_WAKE pin, | |
57 | * assert = Bluetooth device must wake up or remain awake, | |
58 | * deassert = Bluetooth device may sleep when sleep criteria are met | |
59 | * @shutdown: BT_REG_ON pin, | |
60 | * power up or power down Bluetooth device internal regulators | |
8353b4a6 | 61 | * @set_device_wakeup: callback to toggle BT_WAKE pin |
4c33162c | 62 | * either by accessing @device_wakeup or by calling @btlp |
8353b4a6 | 63 | * @set_shutdown: callback to toggle BT_REG_ON pin |
4c33162c LW |
64 | * either by accessing @shutdown or by calling @btpu/@btpd |
65 | * @btlp: Apple ACPI method to toggle BT_WAKE pin ("Bluetooth Low Power") | |
66 | * @btpu: Apple ACPI method to drive BT_REG_ON pin high ("Bluetooth Power Up") | |
67 | * @btpd: Apple ACPI method to drive BT_REG_ON pin low ("Bluetooth Power Down") | |
55dbfcd0 | 68 | * @txco_clk: external reference frequency clock used by Bluetooth device |
90bc07cc | 69 | * @lpo_clk: external LPO clock used by Bluetooth device |
75d11676 CYT |
70 | * @supplies: VBAT and VDDIO supplies used by Bluetooth device |
71 | * @res_enabled: whether clocks and supplies are prepared and enabled | |
b7c2abac LW |
72 | * @init_speed: default baudrate of Bluetooth device; |
73 | * the host UART is initially set to this baudrate so that | |
74 | * it can configure the Bluetooth device for @oper_speed | |
75 | * @oper_speed: preferred baudrate of Bluetooth device; | |
76 | * set to 0 if @init_speed is already the preferred baudrate | |
77 | * @irq: interrupt triggered by HOST_WAKE_BT pin | |
78 | * @irq_active_low: whether @irq is active low | |
79 | * @hu: pointer to HCI UART controller struct, | |
80 | * used to disable flow control during runtime suspend and system sleep | |
81 | * @is_suspended: whether flow control is currently disabled | |
82 | */ | |
0395ffc1 | 83 | struct bcm_device { |
8a920568 HG |
84 | /* Must be the first member, hci_serdev.c expects this. */ |
85 | struct hci_uart serdev_hu; | |
0395ffc1 FD |
86 | struct list_head list; |
87 | ||
c0d3ce58 | 88 | struct device *dev; |
0395ffc1 FD |
89 | |
90 | const char *name; | |
91 | struct gpio_desc *device_wakeup; | |
92 | struct gpio_desc *shutdown; | |
8353b4a6 LW |
93 | int (*set_device_wakeup)(struct bcm_device *, bool); |
94 | int (*set_shutdown)(struct bcm_device *, bool); | |
4c33162c LW |
95 | #ifdef CONFIG_ACPI |
96 | acpi_handle btlp, btpu, btpd; | |
a4de1567 HG |
97 | int gpio_count; |
98 | int gpio_int_idx; | |
4c33162c | 99 | #endif |
0395ffc1 | 100 | |
55dbfcd0 | 101 | struct clk *txco_clk; |
90bc07cc | 102 | struct clk *lpo_clk; |
75d11676 CYT |
103 | struct regulator_bulk_data supplies[BCM_NUM_SUPPLIES]; |
104 | bool res_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 | ||
e09070c5 HG |
129 | static int irq_polarity = -1; |
130 | module_param(irq_polarity, int, 0444); | |
131 | MODULE_PARM_DESC(irq_polarity, "IRQ polarity 0: active-high 1: active-low"); | |
132 | ||
33cd149e LP |
133 | static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed) |
134 | { | |
135 | if (hu->serdev) | |
136 | serdev_device_set_baudrate(hu->serdev, speed); | |
137 | else | |
138 | hci_uart_set_baudrate(hu, speed); | |
139 | } | |
140 | ||
61b2fc2b FD |
141 | static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed) |
142 | { | |
143 | struct hci_dev *hdev = hu->hdev; | |
144 | struct sk_buff *skb; | |
145 | struct bcm_update_uart_baud_rate param; | |
146 | ||
147 | if (speed > 3000000) { | |
148 | struct bcm_write_uart_clock_setting clock; | |
149 | ||
150 | clock.type = BCM_UART_CLOCK_48MHZ; | |
151 | ||
65ad07c9 | 152 | bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type); |
61b2fc2b FD |
153 | |
154 | /* This Broadcom specific command changes the UART's controller | |
155 | * clock for baud rate > 3000000. | |
156 | */ | |
157 | skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT); | |
158 | if (IS_ERR(skb)) { | |
159 | int err = PTR_ERR(skb); | |
65ad07c9 FD |
160 | bt_dev_err(hdev, "BCM: failed to write clock (%d)", |
161 | err); | |
61b2fc2b FD |
162 | return err; |
163 | } | |
164 | ||
165 | kfree_skb(skb); | |
166 | } | |
167 | ||
65ad07c9 | 168 | bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed); |
61b2fc2b FD |
169 | |
170 | param.zero = cpu_to_le16(0); | |
171 | param.baud_rate = cpu_to_le32(speed); | |
172 | ||
173 | /* This Broadcom specific command changes the UART's controller baud | |
174 | * rate. | |
175 | */ | |
176 | skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), ¶m, | |
177 | HCI_INIT_TIMEOUT); | |
178 | if (IS_ERR(skb)) { | |
179 | int err = PTR_ERR(skb); | |
65ad07c9 FD |
180 | bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)", |
181 | err); | |
61b2fc2b FD |
182 | return err; |
183 | } | |
184 | ||
185 | kfree_skb(skb); | |
186 | ||
187 | return 0; | |
188 | } | |
189 | ||
917522aa | 190 | /* bcm_device_exists should be protected by bcm_device_lock */ |
0395ffc1 FD |
191 | static bool bcm_device_exists(struct bcm_device *device) |
192 | { | |
193 | struct list_head *p; | |
194 | ||
81a19053 | 195 | #ifdef CONFIG_PM |
8a920568 HG |
196 | /* Devices using serdev always exist */ |
197 | if (device && device->hu && device->hu->serdev) | |
198 | return true; | |
81a19053 | 199 | #endif |
8a920568 | 200 | |
0395ffc1 FD |
201 | list_for_each(p, &bcm_device_list) { |
202 | struct bcm_device *dev = list_entry(p, struct bcm_device, list); | |
203 | ||
204 | if (device == dev) | |
205 | return true; | |
206 | } | |
207 | ||
208 | return false; | |
209 | } | |
210 | ||
211 | static int bcm_gpio_set_power(struct bcm_device *dev, bool powered) | |
212 | { | |
8bfa7e1e | 213 | int err; |
0395ffc1 | 214 | |
75d11676 | 215 | if (powered && !dev->res_enabled) { |
62611abc CYT |
216 | /* Intel Macs use bcm_apple_get_resources() and don't |
217 | * have regulator supplies configured. | |
218 | */ | |
219 | if (dev->supplies[0].supply) { | |
220 | err = regulator_bulk_enable(BCM_NUM_SUPPLIES, | |
221 | dev->supplies); | |
222 | if (err) | |
223 | return err; | |
224 | } | |
75d11676 | 225 | |
90bc07cc CYT |
226 | /* LPO clock needs to be 32.768 kHz */ |
227 | err = clk_set_rate(dev->lpo_clk, 32768); | |
228 | if (err) { | |
229 | dev_err(dev->dev, "Could not set LPO clock rate\n"); | |
75d11676 | 230 | goto err_regulator_disable; |
90bc07cc CYT |
231 | } |
232 | ||
233 | err = clk_prepare_enable(dev->lpo_clk); | |
8bfa7e1e | 234 | if (err) |
75d11676 | 235 | goto err_regulator_disable; |
90bc07cc CYT |
236 | |
237 | err = clk_prepare_enable(dev->txco_clk); | |
238 | if (err) | |
239 | goto err_lpo_clk_disable; | |
8bfa7e1e LW |
240 | } |
241 | ||
242 | err = dev->set_shutdown(dev, powered); | |
243 | if (err) | |
90bc07cc | 244 | goto err_txco_clk_disable; |
8bfa7e1e LW |
245 | |
246 | err = dev->set_device_wakeup(dev, powered); | |
247 | if (err) | |
248 | goto err_revert_shutdown; | |
0395ffc1 | 249 | |
75d11676 | 250 | if (!powered && dev->res_enabled) { |
55dbfcd0 | 251 | clk_disable_unprepare(dev->txco_clk); |
90bc07cc | 252 | clk_disable_unprepare(dev->lpo_clk); |
62611abc CYT |
253 | |
254 | /* Intel Macs use bcm_apple_get_resources() and don't | |
255 | * have regulator supplies configured. | |
256 | */ | |
257 | if (dev->supplies[0].supply) | |
258 | regulator_bulk_disable(BCM_NUM_SUPPLIES, | |
259 | dev->supplies); | |
90bc07cc | 260 | } |
0395ffc1 | 261 | |
91927a9b | 262 | /* wait for device to power on and come out of reset */ |
16946de5 | 263 | usleep_range(100000, 120000); |
91927a9b | 264 | |
75d11676 | 265 | dev->res_enabled = powered; |
0395ffc1 FD |
266 | |
267 | return 0; | |
8bfa7e1e LW |
268 | |
269 | err_revert_shutdown: | |
270 | dev->set_shutdown(dev, !powered); | |
90bc07cc | 271 | err_txco_clk_disable: |
75d11676 | 272 | if (powered && !dev->res_enabled) |
55dbfcd0 | 273 | clk_disable_unprepare(dev->txco_clk); |
90bc07cc | 274 | err_lpo_clk_disable: |
75d11676 | 275 | if (powered && !dev->res_enabled) |
90bc07cc | 276 | clk_disable_unprepare(dev->lpo_clk); |
75d11676 CYT |
277 | err_regulator_disable: |
278 | if (powered && !dev->res_enabled) | |
279 | regulator_bulk_disable(BCM_NUM_SUPPLIES, dev->supplies); | |
8bfa7e1e | 280 | return err; |
0395ffc1 FD |
281 | } |
282 | ||
b7a622a2 | 283 | #ifdef CONFIG_PM |
6cc4396c FD |
284 | static irqreturn_t bcm_host_wake(int irq, void *data) |
285 | { | |
286 | struct bcm_device *bdev = data; | |
287 | ||
288 | bt_dev_dbg(bdev, "Host wake IRQ"); | |
289 | ||
b09c6152 HG |
290 | pm_runtime_get(bdev->dev); |
291 | pm_runtime_mark_last_busy(bdev->dev); | |
292 | pm_runtime_put_autosuspend(bdev->dev); | |
e88ab30d | 293 | |
6cc4396c FD |
294 | return IRQ_HANDLED; |
295 | } | |
296 | ||
297 | static int bcm_request_irq(struct bcm_data *bcm) | |
298 | { | |
299 | struct bcm_device *bdev = bcm->dev; | |
98dc77d5 | 300 | int err; |
6cc4396c | 301 | |
6cc4396c FD |
302 | mutex_lock(&bcm_device_lock); |
303 | if (!bcm_device_exists(bdev)) { | |
304 | err = -ENODEV; | |
305 | goto unlock; | |
306 | } | |
307 | ||
98dc77d5 LP |
308 | if (bdev->irq <= 0) { |
309 | err = -EOPNOTSUPP; | |
310 | goto unlock; | |
311 | } | |
6cc4396c | 312 | |
c0d3ce58 | 313 | err = devm_request_irq(bdev->dev, bdev->irq, bcm_host_wake, |
227630cc HG |
314 | bdev->irq_active_low ? IRQF_TRIGGER_FALLING : |
315 | IRQF_TRIGGER_RISING, | |
316 | "host_wake", bdev); | |
4dc27330 LW |
317 | if (err) { |
318 | bdev->irq = err; | |
98dc77d5 | 319 | goto unlock; |
4dc27330 | 320 | } |
e88ab30d | 321 | |
c0d3ce58 | 322 | device_init_wakeup(bdev->dev, true); |
98dc77d5 | 323 | |
c0d3ce58 | 324 | pm_runtime_set_autosuspend_delay(bdev->dev, |
98dc77d5 | 325 | BCM_AUTOSUSPEND_DELAY); |
c0d3ce58 HG |
326 | pm_runtime_use_autosuspend(bdev->dev); |
327 | pm_runtime_set_active(bdev->dev); | |
328 | pm_runtime_enable(bdev->dev); | |
6cc4396c FD |
329 | |
330 | unlock: | |
331 | mutex_unlock(&bcm_device_lock); | |
332 | ||
333 | return err; | |
334 | } | |
335 | ||
336 | static const struct bcm_set_sleep_mode default_sleep_params = { | |
337 | .sleep_mode = 1, /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */ | |
338 | .idle_host = 2, /* idle threshold HOST, in 300ms */ | |
339 | .idle_dev = 2, /* idle threshold device, in 300ms */ | |
340 | .bt_wake_active = 1, /* BT_WAKE active mode: 1 = high, 0 = low */ | |
341 | .host_wake_active = 0, /* HOST_WAKE active mode: 1 = high, 0 = low */ | |
342 | .allow_host_sleep = 1, /* Allow host sleep in SCO flag */ | |
e88ab30d | 343 | .combine_modes = 1, /* Combine sleep and LPM flag */ |
6cc4396c FD |
344 | .tristate_control = 0, /* Allow tri-state control of UART tx flag */ |
345 | /* Irrelevant USB flags */ | |
346 | .usb_auto_sleep = 0, | |
347 | .usb_resume_timeout = 0, | |
ff875960 | 348 | .break_to_host = 0, |
e07c99b0 | 349 | .pulsed_host_wake = 1, |
6cc4396c FD |
350 | }; |
351 | ||
352 | static int bcm_setup_sleep(struct hci_uart *hu) | |
353 | { | |
354 | struct bcm_data *bcm = hu->priv; | |
355 | struct sk_buff *skb; | |
356 | struct bcm_set_sleep_mode sleep_params = default_sleep_params; | |
357 | ||
227630cc | 358 | sleep_params.host_wake_active = !bcm->dev->irq_active_low; |
6cc4396c FD |
359 | |
360 | skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params), | |
361 | &sleep_params, HCI_INIT_TIMEOUT); | |
362 | if (IS_ERR(skb)) { | |
363 | int err = PTR_ERR(skb); | |
364 | bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err); | |
365 | return err; | |
366 | } | |
367 | kfree_skb(skb); | |
368 | ||
369 | bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded"); | |
370 | ||
371 | return 0; | |
372 | } | |
373 | #else | |
374 | static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; } | |
375 | static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; } | |
376 | #endif | |
377 | ||
075e1f5e MH |
378 | static int bcm_set_diag(struct hci_dev *hdev, bool enable) |
379 | { | |
380 | struct hci_uart *hu = hci_get_drvdata(hdev); | |
381 | struct bcm_data *bcm = hu->priv; | |
382 | struct sk_buff *skb; | |
383 | ||
384 | if (!test_bit(HCI_RUNNING, &hdev->flags)) | |
385 | return -ENETDOWN; | |
386 | ||
387 | skb = bt_skb_alloc(3, GFP_KERNEL); | |
a1857390 DC |
388 | if (!skb) |
389 | return -ENOMEM; | |
075e1f5e | 390 | |
634fef61 JB |
391 | skb_put_u8(skb, BCM_LM_DIAG_PKT); |
392 | skb_put_u8(skb, 0xf0); | |
393 | skb_put_u8(skb, enable); | |
075e1f5e MH |
394 | |
395 | skb_queue_tail(&bcm->txq, skb); | |
396 | hci_uart_tx_wakeup(hu); | |
397 | ||
398 | return 0; | |
399 | } | |
400 | ||
bdd8818e MH |
401 | static int bcm_open(struct hci_uart *hu) |
402 | { | |
403 | struct bcm_data *bcm; | |
0395ffc1 | 404 | struct list_head *p; |
8bfa7e1e | 405 | int err; |
bdd8818e | 406 | |
65ad07c9 | 407 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
bdd8818e | 408 | |
b36a1552 VD |
409 | if (!hci_uart_has_flow_control(hu)) |
410 | return -EOPNOTSUPP; | |
411 | ||
bdd8818e MH |
412 | bcm = kzalloc(sizeof(*bcm), GFP_KERNEL); |
413 | if (!bcm) | |
414 | return -ENOMEM; | |
415 | ||
416 | skb_queue_head_init(&bcm->txq); | |
417 | ||
418 | hu->priv = bcm; | |
0395ffc1 | 419 | |
8a920568 HG |
420 | mutex_lock(&bcm_device_lock); |
421 | ||
33cd149e | 422 | if (hu->serdev) { |
8a920568 | 423 | bcm->dev = serdev_device_get_drvdata(hu->serdev); |
33cd149e LP |
424 | goto out; |
425 | } | |
426 | ||
95065a61 JH |
427 | if (!hu->tty->dev) |
428 | goto out; | |
429 | ||
0395ffc1 FD |
430 | list_for_each(p, &bcm_device_list) { |
431 | struct bcm_device *dev = list_entry(p, struct bcm_device, list); | |
432 | ||
433 | /* Retrieve saved bcm_device based on parent of the | |
434 | * platform device (saved during device probe) and | |
435 | * parent of tty device used by hci_uart | |
436 | */ | |
c0d3ce58 | 437 | if (hu->tty->dev->parent == dev->dev->parent) { |
0395ffc1 | 438 | bcm->dev = dev; |
b7a622a2 | 439 | #ifdef CONFIG_PM |
118612fb FD |
440 | dev->hu = hu; |
441 | #endif | |
0395ffc1 FD |
442 | break; |
443 | } | |
444 | } | |
445 | ||
95065a61 | 446 | out: |
8a920568 HG |
447 | if (bcm->dev) { |
448 | hu->init_speed = bcm->dev->init_speed; | |
449 | hu->oper_speed = bcm->dev->oper_speed; | |
8bfa7e1e LW |
450 | err = bcm_gpio_set_power(bcm->dev, true); |
451 | if (err) | |
452 | goto err_unset_hu; | |
8a920568 HG |
453 | } |
454 | ||
455 | mutex_unlock(&bcm_device_lock); | |
bdd8818e | 456 | return 0; |
8bfa7e1e LW |
457 | |
458 | err_unset_hu: | |
459 | #ifdef CONFIG_PM | |
e9ca0807 | 460 | if (!hu->serdev) |
8c6b8eda | 461 | bcm->dev->hu = NULL; |
8bfa7e1e | 462 | #endif |
8bfa7e1e LW |
463 | mutex_unlock(&bcm_device_lock); |
464 | hu->priv = NULL; | |
465 | kfree(bcm); | |
466 | return err; | |
bdd8818e MH |
467 | } |
468 | ||
469 | static int bcm_close(struct hci_uart *hu) | |
470 | { | |
471 | struct bcm_data *bcm = hu->priv; | |
8a920568 | 472 | struct bcm_device *bdev = NULL; |
8bfa7e1e | 473 | int err; |
bdd8818e | 474 | |
65ad07c9 | 475 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
bdd8818e | 476 | |
0395ffc1 | 477 | /* Protect bcm->dev against removal of the device or driver */ |
bb3ea16a | 478 | mutex_lock(&bcm_device_lock); |
8a920568 HG |
479 | |
480 | if (hu->serdev) { | |
8a920568 HG |
481 | bdev = serdev_device_get_drvdata(hu->serdev); |
482 | } else if (bcm_device_exists(bcm->dev)) { | |
483 | bdev = bcm->dev; | |
484 | #ifdef CONFIG_PM | |
485 | bdev->hu = NULL; | |
486 | #endif | |
487 | } | |
488 | ||
489 | if (bdev) { | |
6d83f1ee | 490 | if (IS_ENABLED(CONFIG_PM) && bdev->irq > 0) { |
c0d3ce58 HG |
491 | devm_free_irq(bdev->dev, bdev->irq, bdev); |
492 | device_init_wakeup(bdev->dev, false); | |
f4cf6b7e | 493 | pm_runtime_disable(bdev->dev); |
6cc4396c | 494 | } |
54ba69f9 | 495 | |
8bfa7e1e LW |
496 | err = bcm_gpio_set_power(bdev, false); |
497 | if (err) | |
498 | bt_dev_err(hu->hdev, "Failed to power down"); | |
499 | else | |
500 | pm_runtime_set_suspended(bdev->dev); | |
118612fb | 501 | } |
bb3ea16a | 502 | mutex_unlock(&bcm_device_lock); |
0395ffc1 | 503 | |
bdd8818e MH |
504 | skb_queue_purge(&bcm->txq); |
505 | kfree_skb(bcm->rx_skb); | |
506 | kfree(bcm); | |
507 | ||
508 | hu->priv = NULL; | |
509 | return 0; | |
510 | } | |
511 | ||
512 | static int bcm_flush(struct hci_uart *hu) | |
513 | { | |
514 | struct bcm_data *bcm = hu->priv; | |
515 | ||
65ad07c9 | 516 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
bdd8818e MH |
517 | |
518 | skb_queue_purge(&bcm->txq); | |
519 | ||
520 | return 0; | |
521 | } | |
522 | ||
523 | static int bcm_setup(struct hci_uart *hu) | |
524 | { | |
6cc4396c | 525 | struct bcm_data *bcm = hu->priv; |
6be09b48 FD |
526 | char fw_name[64]; |
527 | const struct firmware *fw; | |
960ef1d7 | 528 | unsigned int speed; |
6be09b48 FD |
529 | int err; |
530 | ||
65ad07c9 | 531 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
bdd8818e | 532 | |
075e1f5e | 533 | hu->hdev->set_diag = bcm_set_diag; |
bdd8818e MH |
534 | hu->hdev->set_bdaddr = btbcm_set_bdaddr; |
535 | ||
22ac1916 | 536 | err = btbcm_initialize(hu->hdev, fw_name, sizeof(fw_name), false); |
6be09b48 FD |
537 | if (err) |
538 | return err; | |
539 | ||
540 | err = request_firmware(&fw, fw_name, &hu->hdev->dev); | |
541 | if (err < 0) { | |
65ad07c9 | 542 | bt_dev_info(hu->hdev, "BCM: Patch %s not found", fw_name); |
6be09b48 FD |
543 | return 0; |
544 | } | |
545 | ||
546 | err = btbcm_patchram(hu->hdev, fw); | |
547 | if (err) { | |
65ad07c9 | 548 | bt_dev_info(hu->hdev, "BCM: Patch failed (%d)", err); |
6be09b48 FD |
549 | goto finalize; |
550 | } | |
551 | ||
960ef1d7 FD |
552 | /* Init speed if any */ |
553 | if (hu->init_speed) | |
554 | speed = hu->init_speed; | |
555 | else if (hu->proto->init_speed) | |
556 | speed = hu->proto->init_speed; | |
557 | else | |
558 | speed = 0; | |
559 | ||
560 | if (speed) | |
33cd149e | 561 | host_set_baudrate(hu, speed); |
960ef1d7 FD |
562 | |
563 | /* Operational speed if any */ | |
564 | if (hu->oper_speed) | |
565 | speed = hu->oper_speed; | |
566 | else if (hu->proto->oper_speed) | |
567 | speed = hu->proto->oper_speed; | |
568 | else | |
569 | speed = 0; | |
570 | ||
571 | if (speed) { | |
572 | err = bcm_set_baudrate(hu, speed); | |
61b2fc2b | 573 | if (!err) |
33cd149e | 574 | host_set_baudrate(hu, speed); |
61b2fc2b FD |
575 | } |
576 | ||
6be09b48 FD |
577 | finalize: |
578 | release_firmware(fw); | |
579 | ||
580 | err = btbcm_finalize(hu->hdev); | |
6cc4396c FD |
581 | if (err) |
582 | return err; | |
583 | ||
cdd24a20 | 584 | if (!bcm_request_irq(bcm)) |
6cc4396c | 585 | err = bcm_setup_sleep(hu); |
6be09b48 FD |
586 | |
587 | return err; | |
bdd8818e MH |
588 | } |
589 | ||
94c58132 MH |
590 | #define BCM_RECV_LM_DIAG \ |
591 | .type = BCM_LM_DIAG_PKT, \ | |
592 | .hlen = BCM_LM_DIAG_SIZE, \ | |
593 | .loff = 0, \ | |
594 | .lsize = 0, \ | |
595 | .maxlen = BCM_LM_DIAG_SIZE | |
596 | ||
01d5e44a MH |
597 | #define BCM_RECV_NULL \ |
598 | .type = BCM_NULL_PKT, \ | |
599 | .hlen = BCM_NULL_SIZE, \ | |
600 | .loff = 0, \ | |
601 | .lsize = 0, \ | |
602 | .maxlen = BCM_NULL_SIZE | |
603 | ||
22bba805 JB |
604 | #define BCM_RECV_TYPE49 \ |
605 | .type = BCM_TYPE49_PKT, \ | |
606 | .hlen = BCM_TYPE49_SIZE, \ | |
607 | .loff = 0, \ | |
608 | .lsize = 0, \ | |
609 | .maxlen = BCM_TYPE49_SIZE | |
610 | ||
611 | #define BCM_RECV_TYPE52 \ | |
612 | .type = BCM_TYPE52_PKT, \ | |
613 | .hlen = BCM_TYPE52_SIZE, \ | |
614 | .loff = 0, \ | |
615 | .lsize = 0, \ | |
616 | .maxlen = BCM_TYPE52_SIZE | |
617 | ||
79b8df93 | 618 | static const struct h4_recv_pkt bcm_recv_pkts[] = { |
94c58132 MH |
619 | { H4_RECV_ACL, .recv = hci_recv_frame }, |
620 | { H4_RECV_SCO, .recv = hci_recv_frame }, | |
621 | { H4_RECV_EVENT, .recv = hci_recv_frame }, | |
622 | { BCM_RECV_LM_DIAG, .recv = hci_recv_diag }, | |
01d5e44a | 623 | { BCM_RECV_NULL, .recv = hci_recv_diag }, |
22bba805 JB |
624 | { BCM_RECV_TYPE49, .recv = hci_recv_diag }, |
625 | { BCM_RECV_TYPE52, .recv = hci_recv_diag }, | |
79b8df93 MH |
626 | }; |
627 | ||
bdd8818e MH |
628 | static int bcm_recv(struct hci_uart *hu, const void *data, int count) |
629 | { | |
630 | struct bcm_data *bcm = hu->priv; | |
631 | ||
632 | if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) | |
633 | return -EUNATCH; | |
634 | ||
79b8df93 MH |
635 | bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count, |
636 | bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts)); | |
bdd8818e MH |
637 | if (IS_ERR(bcm->rx_skb)) { |
638 | int err = PTR_ERR(bcm->rx_skb); | |
65ad07c9 | 639 | bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err); |
37134167 | 640 | bcm->rx_skb = NULL; |
bdd8818e | 641 | return err; |
e88ab30d FD |
642 | } else if (!bcm->rx_skb) { |
643 | /* Delay auto-suspend when receiving completed packet */ | |
644 | mutex_lock(&bcm_device_lock); | |
b09c6152 HG |
645 | if (bcm->dev && bcm_device_exists(bcm->dev)) { |
646 | pm_runtime_get(bcm->dev->dev); | |
647 | pm_runtime_mark_last_busy(bcm->dev->dev); | |
648 | pm_runtime_put_autosuspend(bcm->dev->dev); | |
649 | } | |
e88ab30d | 650 | mutex_unlock(&bcm_device_lock); |
bdd8818e MH |
651 | } |
652 | ||
653 | return count; | |
654 | } | |
655 | ||
656 | static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb) | |
657 | { | |
658 | struct bcm_data *bcm = hu->priv; | |
659 | ||
65ad07c9 | 660 | bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb); |
bdd8818e MH |
661 | |
662 | /* Prepend skb with frame type */ | |
618e8bc2 | 663 | memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); |
bdd8818e MH |
664 | skb_queue_tail(&bcm->txq, skb); |
665 | ||
666 | return 0; | |
667 | } | |
668 | ||
669 | static struct sk_buff *bcm_dequeue(struct hci_uart *hu) | |
670 | { | |
671 | struct bcm_data *bcm = hu->priv; | |
e88ab30d FD |
672 | struct sk_buff *skb = NULL; |
673 | struct bcm_device *bdev = NULL; | |
674 | ||
675 | mutex_lock(&bcm_device_lock); | |
676 | ||
677 | if (bcm_device_exists(bcm->dev)) { | |
678 | bdev = bcm->dev; | |
c0d3ce58 | 679 | pm_runtime_get_sync(bdev->dev); |
e88ab30d FD |
680 | /* Shall be resumed here */ |
681 | } | |
682 | ||
683 | skb = skb_dequeue(&bcm->txq); | |
684 | ||
685 | if (bdev) { | |
c0d3ce58 HG |
686 | pm_runtime_mark_last_busy(bdev->dev); |
687 | pm_runtime_put_autosuspend(bdev->dev); | |
e88ab30d | 688 | } |
bdd8818e | 689 | |
e88ab30d FD |
690 | mutex_unlock(&bcm_device_lock); |
691 | ||
692 | return skb; | |
bdd8818e MH |
693 | } |
694 | ||
b7a622a2 FD |
695 | #ifdef CONFIG_PM |
696 | static int bcm_suspend_device(struct device *dev) | |
118612fb | 697 | { |
78277d73 | 698 | struct bcm_device *bdev = dev_get_drvdata(dev); |
8bfa7e1e | 699 | int err; |
118612fb | 700 | |
b7a622a2 | 701 | bt_dev_dbg(bdev, ""); |
917522aa | 702 | |
b7a622a2 | 703 | if (!bdev->is_suspended && bdev->hu) { |
118612fb FD |
704 | hci_uart_set_flow_control(bdev->hu, true); |
705 | ||
b7a622a2 | 706 | /* Once this returns, driver suspends BT via GPIO */ |
118612fb FD |
707 | bdev->is_suspended = true; |
708 | } | |
709 | ||
710 | /* Suspend the device */ | |
8bfa7e1e LW |
711 | err = bdev->set_device_wakeup(bdev, false); |
712 | if (err) { | |
713 | if (bdev->is_suspended && bdev->hu) { | |
714 | bdev->is_suspended = false; | |
715 | hci_uart_set_flow_control(bdev->hu, false); | |
716 | } | |
717 | return -EBUSY; | |
718 | } | |
719 | ||
3e81a4ca | 720 | bt_dev_dbg(bdev, "suspend, delaying 15 ms"); |
e4b9e5b8 | 721 | msleep(15); |
118612fb | 722 | |
b7a622a2 FD |
723 | return 0; |
724 | } | |
725 | ||
726 | static int bcm_resume_device(struct device *dev) | |
727 | { | |
78277d73 | 728 | struct bcm_device *bdev = dev_get_drvdata(dev); |
8bfa7e1e | 729 | int err; |
b7a622a2 FD |
730 | |
731 | bt_dev_dbg(bdev, ""); | |
732 | ||
8bfa7e1e LW |
733 | err = bdev->set_device_wakeup(bdev, true); |
734 | if (err) { | |
735 | dev_err(dev, "Failed to power up\n"); | |
736 | return err; | |
737 | } | |
738 | ||
3e81a4ca | 739 | bt_dev_dbg(bdev, "resume, delaying 15 ms"); |
e4b9e5b8 | 740 | msleep(15); |
b7a622a2 FD |
741 | |
742 | /* When this executes, the device has woken up already */ | |
743 | if (bdev->is_suspended && bdev->hu) { | |
744 | bdev->is_suspended = false; | |
745 | ||
746 | hci_uart_set_flow_control(bdev->hu, false); | |
747 | } | |
748 | ||
749 | return 0; | |
750 | } | |
751 | #endif | |
752 | ||
753 | #ifdef CONFIG_PM_SLEEP | |
8a920568 | 754 | /* suspend callback */ |
b7a622a2 FD |
755 | static int bcm_suspend(struct device *dev) |
756 | { | |
78277d73 | 757 | struct bcm_device *bdev = dev_get_drvdata(dev); |
b7a622a2 FD |
758 | int error; |
759 | ||
760 | bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended); | |
761 | ||
8a920568 HG |
762 | /* |
763 | * When used with a device instantiated as platform_device, bcm_suspend | |
764 | * can be called at any time as long as the platform device is bound, | |
765 | * so it should use bcm_device_lock to protect access to hci_uart | |
b7a622a2 FD |
766 | * and device_wake-up GPIO. |
767 | */ | |
768 | mutex_lock(&bcm_device_lock); | |
769 | ||
770 | if (!bdev->hu) | |
771 | goto unlock; | |
772 | ||
e88ab30d FD |
773 | if (pm_runtime_active(dev)) |
774 | bcm_suspend_device(dev); | |
b7a622a2 | 775 | |
4a59f1fa | 776 | if (device_may_wakeup(dev) && bdev->irq > 0) { |
6cc4396c FD |
777 | error = enable_irq_wake(bdev->irq); |
778 | if (!error) | |
779 | bt_dev_dbg(bdev, "BCM irq: enabled"); | |
780 | } | |
781 | ||
917522aa | 782 | unlock: |
bb3ea16a | 783 | mutex_unlock(&bcm_device_lock); |
917522aa | 784 | |
118612fb FD |
785 | return 0; |
786 | } | |
787 | ||
8a920568 | 788 | /* resume callback */ |
118612fb FD |
789 | static int bcm_resume(struct device *dev) |
790 | { | |
78277d73 | 791 | struct bcm_device *bdev = dev_get_drvdata(dev); |
8bfa7e1e | 792 | int err = 0; |
118612fb | 793 | |
65ad07c9 | 794 | bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended); |
118612fb | 795 | |
8a920568 HG |
796 | /* |
797 | * When used with a device instantiated as platform_device, bcm_resume | |
798 | * can be called at any time as long as platform device is bound, | |
799 | * so it should use bcm_device_lock to protect access to hci_uart | |
b7a622a2 FD |
800 | * and device_wake-up GPIO. |
801 | */ | |
bb3ea16a | 802 | mutex_lock(&bcm_device_lock); |
917522aa FD |
803 | |
804 | if (!bdev->hu) | |
805 | goto unlock; | |
806 | ||
4a59f1fa | 807 | if (device_may_wakeup(dev) && bdev->irq > 0) { |
6cc4396c FD |
808 | disable_irq_wake(bdev->irq); |
809 | bt_dev_dbg(bdev, "BCM irq: disabled"); | |
810 | } | |
811 | ||
8bfa7e1e | 812 | err = bcm_resume_device(dev); |
118612fb | 813 | |
917522aa | 814 | unlock: |
bb3ea16a | 815 | mutex_unlock(&bcm_device_lock); |
917522aa | 816 | |
8bfa7e1e LW |
817 | if (!err) { |
818 | pm_runtime_disable(dev); | |
819 | pm_runtime_set_active(dev); | |
820 | pm_runtime_enable(dev); | |
821 | } | |
e88ab30d | 822 | |
118612fb FD |
823 | return 0; |
824 | } | |
825 | #endif | |
826 | ||
ff7c8380 Y |
827 | /* Some firmware reports an IRQ which does not work (wrong pin in fw table?) */ |
828 | static const struct dmi_system_id bcm_broken_irq_dmi_table[] = { | |
829 | { | |
830 | .ident = "Meegopad T08", | |
831 | .matches = { | |
832 | DMI_EXACT_MATCH(DMI_BOARD_VENDOR, | |
833 | "To be filled by OEM."), | |
834 | DMI_EXACT_MATCH(DMI_BOARD_NAME, "T3 MRD"), | |
835 | DMI_EXACT_MATCH(DMI_BOARD_VERSION, "V1.1"), | |
836 | }, | |
837 | }, | |
838 | { } | |
839 | }; | |
840 | ||
841 | #ifdef CONFIG_ACPI | |
9644e6b9 HG |
842 | static const struct acpi_gpio_params first_gpio = { 0, 0, false }; |
843 | static const struct acpi_gpio_params second_gpio = { 1, 0, false }; | |
844 | static const struct acpi_gpio_params third_gpio = { 2, 0, false }; | |
89ab37b4 DD |
845 | |
846 | static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = { | |
9644e6b9 HG |
847 | { "device-wakeup-gpios", &first_gpio, 1 }, |
848 | { "shutdown-gpios", &second_gpio, 1 }, | |
849 | { "host-wakeup-gpios", &third_gpio, 1 }, | |
89ab37b4 DD |
850 | { }, |
851 | }; | |
852 | ||
89ab37b4 | 853 | static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = { |
9644e6b9 HG |
854 | { "host-wakeup-gpios", &first_gpio, 1 }, |
855 | { "device-wakeup-gpios", &second_gpio, 1 }, | |
856 | { "shutdown-gpios", &third_gpio, 1 }, | |
0395ffc1 FD |
857 | { }, |
858 | }; | |
859 | ||
ae056908 FD |
860 | static int bcm_resource(struct acpi_resource *ares, void *data) |
861 | { | |
862 | struct bcm_device *dev = data; | |
6cc4396c FD |
863 | struct acpi_resource_extended_irq *irq; |
864 | struct acpi_resource_gpio *gpio; | |
865 | struct acpi_resource_uart_serialbus *sb; | |
866 | ||
867 | switch (ares->type) { | |
868 | case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: | |
869 | irq = &ares->data.extended_irq; | |
bb5208b3 HG |
870 | if (irq->polarity != ACPI_ACTIVE_LOW) |
871 | dev_info(dev->dev, "ACPI Interrupt resource is active-high, this is usually wrong, treating the IRQ as active-low\n"); | |
872 | dev->irq_active_low = true; | |
6cc4396c FD |
873 | break; |
874 | ||
875 | case ACPI_RESOURCE_TYPE_GPIO: | |
876 | gpio = &ares->data.gpio; | |
a4de1567 HG |
877 | if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) { |
878 | dev->gpio_int_idx = dev->gpio_count; | |
227630cc | 879 | dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW; |
a4de1567 HG |
880 | } |
881 | dev->gpio_count++; | |
6cc4396c FD |
882 | break; |
883 | ||
884 | case ACPI_RESOURCE_TYPE_SERIAL_BUS: | |
ae056908 | 885 | sb = &ares->data.uart_serial_bus; |
74183a1c | 886 | if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) { |
ae056908 | 887 | dev->init_speed = sb->default_baud_rate; |
74183a1c MH |
888 | dev->oper_speed = 4000000; |
889 | } | |
6cc4396c FD |
890 | break; |
891 | ||
892 | default: | |
893 | break; | |
ae056908 FD |
894 | } |
895 | ||
9d54fd6a | 896 | return 0; |
ae056908 | 897 | } |
4c33162c LW |
898 | |
899 | static int bcm_apple_set_device_wakeup(struct bcm_device *dev, bool awake) | |
900 | { | |
901 | if (ACPI_FAILURE(acpi_execute_simple_method(dev->btlp, NULL, !awake))) | |
902 | return -EIO; | |
903 | ||
904 | return 0; | |
905 | } | |
906 | ||
907 | static int bcm_apple_set_shutdown(struct bcm_device *dev, bool powered) | |
908 | { | |
909 | if (ACPI_FAILURE(acpi_evaluate_object(powered ? dev->btpu : dev->btpd, | |
910 | NULL, NULL, NULL))) | |
911 | return -EIO; | |
912 | ||
913 | return 0; | |
914 | } | |
915 | ||
916 | static int bcm_apple_get_resources(struct bcm_device *dev) | |
917 | { | |
918 | struct acpi_device *adev = ACPI_COMPANION(dev->dev); | |
919 | const union acpi_object *obj; | |
920 | ||
921 | if (!adev || | |
922 | ACPI_FAILURE(acpi_get_handle(adev->handle, "BTLP", &dev->btlp)) || | |
923 | ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPU", &dev->btpu)) || | |
924 | ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPD", &dev->btpd))) | |
925 | return -ENODEV; | |
926 | ||
927 | if (!acpi_dev_get_property(adev, "baud", ACPI_TYPE_BUFFER, &obj) && | |
928 | obj->buffer.length == 8) | |
929 | dev->init_speed = *(u64 *)obj->buffer.pointer; | |
930 | ||
931 | dev->set_device_wakeup = bcm_apple_set_device_wakeup; | |
932 | dev->set_shutdown = bcm_apple_set_shutdown; | |
933 | ||
934 | return 0; | |
935 | } | |
936 | #else | |
937 | static inline int bcm_apple_get_resources(struct bcm_device *dev) | |
938 | { | |
939 | return -EOPNOTSUPP; | |
940 | } | |
212d7183 | 941 | #endif /* CONFIG_ACPI */ |
ae056908 | 942 | |
8353b4a6 LW |
943 | static int bcm_gpio_set_device_wakeup(struct bcm_device *dev, bool awake) |
944 | { | |
fb2d466b | 945 | gpiod_set_value_cansleep(dev->device_wakeup, awake); |
8353b4a6 LW |
946 | return 0; |
947 | } | |
948 | ||
949 | static int bcm_gpio_set_shutdown(struct bcm_device *dev, bool powered) | |
950 | { | |
fb2d466b | 951 | gpiod_set_value_cansleep(dev->shutdown, powered); |
8353b4a6 LW |
952 | return 0; |
953 | } | |
954 | ||
55dbfcd0 CYT |
955 | /* Try a bunch of names for TXCO */ |
956 | static struct clk *bcm_get_txco(struct device *dev) | |
957 | { | |
958 | struct clk *clk; | |
959 | ||
960 | /* New explicit name */ | |
961 | clk = devm_clk_get(dev, "txco"); | |
962 | if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER) | |
963 | return clk; | |
964 | ||
965 | /* Deprecated name */ | |
966 | clk = devm_clk_get(dev, "extclk"); | |
967 | if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER) | |
968 | return clk; | |
969 | ||
970 | /* Original code used no name at all */ | |
971 | return devm_clk_get(dev, NULL); | |
972 | } | |
973 | ||
42ef18f0 | 974 | static int bcm_get_resources(struct bcm_device *dev) |
0395ffc1 | 975 | { |
2b05393b | 976 | const struct dmi_system_id *dmi_id; |
75d11676 | 977 | int err; |
2b05393b | 978 | |
c0d3ce58 | 979 | dev->name = dev_name(dev->dev); |
0395ffc1 | 980 | |
4c33162c LW |
981 | if (x86_apple_machine && !bcm_apple_get_resources(dev)) |
982 | return 0; | |
983 | ||
55dbfcd0 | 984 | dev->txco_clk = bcm_get_txco(dev->dev); |
89ab37b4 | 985 | |
28ac03b9 | 986 | /* Handle deferred probing */ |
55dbfcd0 CYT |
987 | if (dev->txco_clk == ERR_PTR(-EPROBE_DEFER)) |
988 | return PTR_ERR(dev->txco_clk); | |
28ac03b9 | 989 | |
8c08947b | 990 | /* Ignore all other errors as before */ |
55dbfcd0 CYT |
991 | if (IS_ERR(dev->txco_clk)) |
992 | dev->txco_clk = NULL; | |
8c08947b | 993 | |
90bc07cc CYT |
994 | dev->lpo_clk = devm_clk_get(dev->dev, "lpo"); |
995 | if (dev->lpo_clk == ERR_PTR(-EPROBE_DEFER)) | |
996 | return PTR_ERR(dev->lpo_clk); | |
997 | ||
998 | if (IS_ERR(dev->lpo_clk)) | |
999 | dev->lpo_clk = NULL; | |
1000 | ||
1001 | /* Check if we accidentally fetched the lpo clock twice */ | |
1002 | if (dev->lpo_clk && clk_is_match(dev->lpo_clk, dev->txco_clk)) { | |
1003 | devm_clk_put(dev->dev, dev->txco_clk); | |
1004 | dev->txco_clk = NULL; | |
1005 | } | |
1006 | ||
ab2f336c SW |
1007 | dev->device_wakeup = devm_gpiod_get_optional(dev->dev, "device-wakeup", |
1008 | GPIOD_OUT_LOW); | |
62aaefa7 UKK |
1009 | if (IS_ERR(dev->device_wakeup)) |
1010 | return PTR_ERR(dev->device_wakeup); | |
0395ffc1 | 1011 | |
ab2f336c SW |
1012 | dev->shutdown = devm_gpiod_get_optional(dev->dev, "shutdown", |
1013 | GPIOD_OUT_LOW); | |
62aaefa7 UKK |
1014 | if (IS_ERR(dev->shutdown)) |
1015 | return PTR_ERR(dev->shutdown); | |
0395ffc1 | 1016 | |
8353b4a6 LW |
1017 | dev->set_device_wakeup = bcm_gpio_set_device_wakeup; |
1018 | dev->set_shutdown = bcm_gpio_set_shutdown; | |
1019 | ||
75d11676 CYT |
1020 | dev->supplies[0].supply = "vbat"; |
1021 | dev->supplies[1].supply = "vddio"; | |
1022 | err = devm_regulator_bulk_get(dev->dev, BCM_NUM_SUPPLIES, | |
1023 | dev->supplies); | |
1024 | if (err) | |
1025 | return err; | |
1026 | ||
6cc4396c | 1027 | /* IRQ can be declared in ACPI table as Interrupt or GpioInt */ |
6cc4396c FD |
1028 | if (dev->irq <= 0) { |
1029 | struct gpio_desc *gpio; | |
1030 | ||
c0d3ce58 | 1031 | gpio = devm_gpiod_get_optional(dev->dev, "host-wakeup", |
6cc4396c FD |
1032 | GPIOD_IN); |
1033 | if (IS_ERR(gpio)) | |
1034 | return PTR_ERR(gpio); | |
1035 | ||
1036 | dev->irq = gpiod_to_irq(gpio); | |
1037 | } | |
1038 | ||
2b05393b HG |
1039 | dmi_id = dmi_first_match(bcm_broken_irq_dmi_table); |
1040 | if (dmi_id) { | |
1041 | dev_info(dev->dev, "%s: Has a broken IRQ config, disabling IRQ support / runtime-pm\n", | |
1042 | dmi_id->ident); | |
1043 | dev->irq = 0; | |
1044 | } | |
1045 | ||
5954cdf1 | 1046 | dev_dbg(dev->dev, "BCM irq: %d\n", dev->irq); |
212d7183 AS |
1047 | return 0; |
1048 | } | |
1049 | ||
1050 | #ifdef CONFIG_ACPI | |
1051 | static int bcm_acpi_probe(struct bcm_device *dev) | |
1052 | { | |
212d7183 | 1053 | LIST_HEAD(resources); |
212d7183 | 1054 | const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios; |
9d54fd6a | 1055 | struct resource_entry *entry; |
212d7183 AS |
1056 | int ret; |
1057 | ||
ae056908 | 1058 | /* Retrieve UART ACPI info */ |
a4de1567 | 1059 | dev->gpio_int_idx = -1; |
c0d3ce58 | 1060 | ret = acpi_dev_get_resources(ACPI_COMPANION(dev->dev), |
e98d6d62 | 1061 | &resources, bcm_resource, dev); |
5be00284 JN |
1062 | if (ret < 0) |
1063 | return ret; | |
9d54fd6a HG |
1064 | |
1065 | resource_list_for_each_entry(entry, &resources) { | |
1066 | if (resource_type(entry->res) == IORESOURCE_IRQ) { | |
1067 | dev->irq = entry->res->start; | |
1068 | break; | |
1069 | } | |
1070 | } | |
09dbf1b7 | 1071 | acpi_dev_free_resource_list(&resources); |
ae056908 | 1072 | |
a4de1567 HG |
1073 | /* If the DSDT uses an Interrupt resource for the IRQ, then there are |
1074 | * only 2 GPIO resources, we use the irq-last mapping for this, since | |
1075 | * we already have an irq the 3th / last mapping will not be used. | |
1076 | */ | |
1077 | if (dev->irq) | |
1078 | gpio_mapping = acpi_bcm_int_last_gpios; | |
1079 | else if (dev->gpio_int_idx == 0) | |
1080 | gpio_mapping = acpi_bcm_int_first_gpios; | |
1081 | else if (dev->gpio_int_idx == 2) | |
1082 | gpio_mapping = acpi_bcm_int_last_gpios; | |
1083 | else | |
1084 | dev_warn(dev->dev, "Unexpected ACPI gpio_int_idx: %d\n", | |
1085 | dev->gpio_int_idx); | |
1086 | ||
1087 | /* Warn if our expectations are not met. */ | |
1088 | if (dev->gpio_count != (dev->irq ? 2 : 3)) | |
1089 | dev_warn(dev->dev, "Unexpected number of ACPI GPIOs: %d\n", | |
1090 | dev->gpio_count); | |
1091 | ||
1092 | ret = devm_acpi_dev_add_driver_gpios(dev->dev, gpio_mapping); | |
1093 | if (ret) | |
1094 | return ret; | |
1095 | ||
e09070c5 HG |
1096 | if (irq_polarity != -1) { |
1097 | dev->irq_active_low = irq_polarity; | |
1098 | dev_warn(dev->dev, "Overwriting IRQ polarity to active %s by module-param\n", | |
1099 | dev->irq_active_low ? "low" : "high"); | |
5cebdfea FD |
1100 | } |
1101 | ||
0395ffc1 FD |
1102 | return 0; |
1103 | } | |
50d78bcf FD |
1104 | #else |
1105 | static int bcm_acpi_probe(struct bcm_device *dev) | |
1106 | { | |
1107 | return -EINVAL; | |
1108 | } | |
1109 | #endif /* CONFIG_ACPI */ | |
0395ffc1 | 1110 | |
8a920568 HG |
1111 | static int bcm_of_probe(struct bcm_device *bdev) |
1112 | { | |
1113 | device_property_read_u32(bdev->dev, "max-speed", &bdev->oper_speed); | |
1114 | return 0; | |
1115 | } | |
1116 | ||
0395ffc1 FD |
1117 | static int bcm_probe(struct platform_device *pdev) |
1118 | { | |
1119 | struct bcm_device *dev; | |
0395ffc1 FD |
1120 | int ret; |
1121 | ||
1122 | dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); | |
1123 | if (!dev) | |
1124 | return -ENOMEM; | |
1125 | ||
c0d3ce58 | 1126 | dev->dev = &pdev->dev; |
4a56f891 | 1127 | dev->irq = platform_get_irq(pdev, 0); |
0395ffc1 | 1128 | |
201762e2 | 1129 | if (has_acpi_companion(&pdev->dev)) { |
212d7183 | 1130 | ret = bcm_acpi_probe(dev); |
201762e2 HG |
1131 | if (ret) |
1132 | return ret; | |
1133 | } | |
1134 | ||
42ef18f0 | 1135 | ret = bcm_get_resources(dev); |
4d1c4558 JN |
1136 | if (ret) |
1137 | return ret; | |
0395ffc1 FD |
1138 | |
1139 | platform_set_drvdata(pdev, dev); | |
1140 | ||
1141 | dev_info(&pdev->dev, "%s device registered.\n", dev->name); | |
1142 | ||
1143 | /* Place this instance on the device list */ | |
bb3ea16a | 1144 | mutex_lock(&bcm_device_lock); |
0395ffc1 | 1145 | list_add_tail(&dev->list, &bcm_device_list); |
bb3ea16a | 1146 | mutex_unlock(&bcm_device_lock); |
0395ffc1 | 1147 | |
8bfa7e1e LW |
1148 | ret = bcm_gpio_set_power(dev, false); |
1149 | if (ret) | |
1150 | dev_err(&pdev->dev, "Failed to power down\n"); | |
0395ffc1 FD |
1151 | |
1152 | return 0; | |
1153 | } | |
1154 | ||
1155 | static int bcm_remove(struct platform_device *pdev) | |
1156 | { | |
1157 | struct bcm_device *dev = platform_get_drvdata(pdev); | |
1158 | ||
bb3ea16a | 1159 | mutex_lock(&bcm_device_lock); |
0395ffc1 | 1160 | list_del(&dev->list); |
bb3ea16a | 1161 | mutex_unlock(&bcm_device_lock); |
0395ffc1 | 1162 | |
0395ffc1 FD |
1163 | dev_info(&pdev->dev, "%s device unregistered.\n", dev->name); |
1164 | ||
1165 | return 0; | |
1166 | } | |
1167 | ||
bdd8818e MH |
1168 | static const struct hci_uart_proto bcm_proto = { |
1169 | .id = HCI_UART_BCM, | |
143f0a28 | 1170 | .name = "Broadcom", |
aee61f7a | 1171 | .manufacturer = 15, |
61b2fc2b | 1172 | .init_speed = 115200, |
bdd8818e MH |
1173 | .open = bcm_open, |
1174 | .close = bcm_close, | |
1175 | .flush = bcm_flush, | |
1176 | .setup = bcm_setup, | |
61b2fc2b | 1177 | .set_baudrate = bcm_set_baudrate, |
bdd8818e MH |
1178 | .recv = bcm_recv, |
1179 | .enqueue = bcm_enqueue, | |
1180 | .dequeue = bcm_dequeue, | |
1181 | }; | |
1182 | ||
0395ffc1 FD |
1183 | #ifdef CONFIG_ACPI |
1184 | static const struct acpi_device_id bcm_acpi_match[] = { | |
61121502 HG |
1185 | { "BCM2E00" }, |
1186 | { "BCM2E01" }, | |
1187 | { "BCM2E02" }, | |
1188 | { "BCM2E03" }, | |
1189 | { "BCM2E04" }, | |
1190 | { "BCM2E05" }, | |
1191 | { "BCM2E06" }, | |
1192 | { "BCM2E07" }, | |
1193 | { "BCM2E08" }, | |
1194 | { "BCM2E09" }, | |
1195 | { "BCM2E0A" }, | |
1196 | { "BCM2E0B" }, | |
1197 | { "BCM2E0C" }, | |
1198 | { "BCM2E0D" }, | |
1199 | { "BCM2E0E" }, | |
1200 | { "BCM2E0F" }, | |
1201 | { "BCM2E10" }, | |
1202 | { "BCM2E11" }, | |
1203 | { "BCM2E12" }, | |
1204 | { "BCM2E13" }, | |
1205 | { "BCM2E14" }, | |
1206 | { "BCM2E15" }, | |
1207 | { "BCM2E16" }, | |
1208 | { "BCM2E17" }, | |
1209 | { "BCM2E18" }, | |
1210 | { "BCM2E19" }, | |
a4de1567 | 1211 | { "BCM2E1A" }, |
61121502 HG |
1212 | { "BCM2E1B" }, |
1213 | { "BCM2E1C" }, | |
1214 | { "BCM2E1D" }, | |
1215 | { "BCM2E1F" }, | |
1216 | { "BCM2E20" }, | |
1217 | { "BCM2E21" }, | |
1218 | { "BCM2E22" }, | |
1219 | { "BCM2E23" }, | |
1220 | { "BCM2E24" }, | |
1221 | { "BCM2E25" }, | |
1222 | { "BCM2E26" }, | |
1223 | { "BCM2E27" }, | |
1224 | { "BCM2E28" }, | |
1225 | { "BCM2E29" }, | |
1226 | { "BCM2E2A" }, | |
1227 | { "BCM2E2B" }, | |
1228 | { "BCM2E2C" }, | |
1229 | { "BCM2E2D" }, | |
1230 | { "BCM2E2E" }, | |
1231 | { "BCM2E2F" }, | |
1232 | { "BCM2E30" }, | |
1233 | { "BCM2E31" }, | |
1234 | { "BCM2E32" }, | |
1235 | { "BCM2E33" }, | |
1236 | { "BCM2E34" }, | |
1237 | { "BCM2E35" }, | |
1238 | { "BCM2E36" }, | |
1239 | { "BCM2E37" }, | |
a4de1567 HG |
1240 | { "BCM2E38" }, |
1241 | { "BCM2E39" }, | |
1242 | { "BCM2E3A" }, | |
61121502 HG |
1243 | { "BCM2E3B" }, |
1244 | { "BCM2E3C" }, | |
a4de1567 | 1245 | { "BCM2E3D" }, |
61121502 | 1246 | { "BCM2E3E" }, |
a4de1567 HG |
1247 | { "BCM2E3F" }, |
1248 | { "BCM2E40" }, | |
61121502 HG |
1249 | { "BCM2E41" }, |
1250 | { "BCM2E42" }, | |
1251 | { "BCM2E43" }, | |
1252 | { "BCM2E44" }, | |
1253 | { "BCM2E45" }, | |
1254 | { "BCM2E46" }, | |
1255 | { "BCM2E47" }, | |
1256 | { "BCM2E48" }, | |
1257 | { "BCM2E49" }, | |
1258 | { "BCM2E4A" }, | |
1259 | { "BCM2E4B" }, | |
1260 | { "BCM2E4C" }, | |
1261 | { "BCM2E4D" }, | |
1262 | { "BCM2E4E" }, | |
1263 | { "BCM2E4F" }, | |
1264 | { "BCM2E50" }, | |
1265 | { "BCM2E51" }, | |
1266 | { "BCM2E52" }, | |
1267 | { "BCM2E53" }, | |
a4de1567 HG |
1268 | { "BCM2E54" }, |
1269 | { "BCM2E55" }, | |
61121502 HG |
1270 | { "BCM2E56" }, |
1271 | { "BCM2E57" }, | |
1272 | { "BCM2E58" }, | |
1273 | { "BCM2E59" }, | |
1274 | { "BCM2E5A" }, | |
1275 | { "BCM2E5B" }, | |
1276 | { "BCM2E5C" }, | |
1277 | { "BCM2E5D" }, | |
1278 | { "BCM2E5E" }, | |
1279 | { "BCM2E5F" }, | |
1280 | { "BCM2E60" }, | |
1281 | { "BCM2E61" }, | |
1282 | { "BCM2E62" }, | |
1283 | { "BCM2E63" }, | |
a4de1567 HG |
1284 | { "BCM2E64" }, |
1285 | { "BCM2E65" }, | |
61121502 | 1286 | { "BCM2E66" }, |
a4de1567 | 1287 | { "BCM2E67" }, |
61121502 HG |
1288 | { "BCM2E68" }, |
1289 | { "BCM2E69" }, | |
1290 | { "BCM2E6B" }, | |
1291 | { "BCM2E6D" }, | |
1292 | { "BCM2E6E" }, | |
1293 | { "BCM2E6F" }, | |
1294 | { "BCM2E70" }, | |
a4de1567 HG |
1295 | { "BCM2E71" }, |
1296 | { "BCM2E72" }, | |
61121502 | 1297 | { "BCM2E73" }, |
a4de1567 | 1298 | { "BCM2E74" }, |
61121502 HG |
1299 | { "BCM2E75" }, |
1300 | { "BCM2E76" }, | |
1301 | { "BCM2E77" }, | |
1302 | { "BCM2E78" }, | |
1303 | { "BCM2E79" }, | |
1304 | { "BCM2E7A" }, | |
a4de1567 HG |
1305 | { "BCM2E7B" }, |
1306 | { "BCM2E7C" }, | |
61121502 | 1307 | { "BCM2E7D" }, |
a4de1567 | 1308 | { "BCM2E7E" }, |
61121502 HG |
1309 | { "BCM2E7F" }, |
1310 | { "BCM2E80" }, | |
1311 | { "BCM2E81" }, | |
1312 | { "BCM2E82" }, | |
a4de1567 HG |
1313 | { "BCM2E83" }, |
1314 | { "BCM2E84" }, | |
61121502 HG |
1315 | { "BCM2E85" }, |
1316 | { "BCM2E86" }, | |
1317 | { "BCM2E87" }, | |
1318 | { "BCM2E88" }, | |
1319 | { "BCM2E89" }, | |
1320 | { "BCM2E8A" }, | |
1321 | { "BCM2E8B" }, | |
1322 | { "BCM2E8C" }, | |
1323 | { "BCM2E8D" }, | |
1324 | { "BCM2E8E" }, | |
a4de1567 | 1325 | { "BCM2E90" }, |
61121502 HG |
1326 | { "BCM2E92" }, |
1327 | { "BCM2E93" }, | |
1328 | { "BCM2E94" }, | |
a4de1567 HG |
1329 | { "BCM2E95" }, |
1330 | { "BCM2E96" }, | |
61121502 HG |
1331 | { "BCM2E97" }, |
1332 | { "BCM2E98" }, | |
1333 | { "BCM2E99" }, | |
1334 | { "BCM2E9A" }, | |
1335 | { "BCM2E9B" }, | |
1336 | { "BCM2E9C" }, | |
1337 | { "BCM2E9D" }, | |
1338 | { "BCM2EA0" }, | |
1339 | { "BCM2EA1" }, | |
1340 | { "BCM2EA2" }, | |
1341 | { "BCM2EA3" }, | |
a4de1567 | 1342 | { "BCM2EA4" }, |
61121502 HG |
1343 | { "BCM2EA5" }, |
1344 | { "BCM2EA6" }, | |
1345 | { "BCM2EA7" }, | |
1346 | { "BCM2EA8" }, | |
1347 | { "BCM2EA9" }, | |
a4de1567 | 1348 | { "BCM2EAA" }, |
61121502 HG |
1349 | { "BCM2EAB" }, |
1350 | { "BCM2EAC" }, | |
0395ffc1 FD |
1351 | { }, |
1352 | }; | |
1353 | MODULE_DEVICE_TABLE(acpi, bcm_acpi_match); | |
1354 | #endif | |
1355 | ||
8a920568 | 1356 | /* suspend and resume callbacks */ |
e88ab30d FD |
1357 | static const struct dev_pm_ops bcm_pm_ops = { |
1358 | SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume) | |
1359 | SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL) | |
1360 | }; | |
118612fb | 1361 | |
0395ffc1 FD |
1362 | static struct platform_driver bcm_driver = { |
1363 | .probe = bcm_probe, | |
1364 | .remove = bcm_remove, | |
1365 | .driver = { | |
1366 | .name = "hci_bcm", | |
1367 | .acpi_match_table = ACPI_PTR(bcm_acpi_match), | |
118612fb | 1368 | .pm = &bcm_pm_ops, |
0395ffc1 FD |
1369 | }, |
1370 | }; | |
1371 | ||
33cd149e LP |
1372 | static int bcm_serdev_probe(struct serdev_device *serdev) |
1373 | { | |
8a920568 | 1374 | struct bcm_device *bcmdev; |
33cd149e LP |
1375 | int err; |
1376 | ||
1377 | bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL); | |
1378 | if (!bcmdev) | |
1379 | return -ENOMEM; | |
1380 | ||
8a920568 | 1381 | bcmdev->dev = &serdev->dev; |
81a19053 | 1382 | #ifdef CONFIG_PM |
8a920568 | 1383 | bcmdev->hu = &bcmdev->serdev_hu; |
81a19053 | 1384 | #endif |
8a920568 | 1385 | bcmdev->serdev_hu.serdev = serdev; |
33cd149e LP |
1386 | serdev_device_set_drvdata(serdev, bcmdev); |
1387 | ||
8a920568 HG |
1388 | if (has_acpi_companion(&serdev->dev)) |
1389 | err = bcm_acpi_probe(bcmdev); | |
1390 | else | |
1391 | err = bcm_of_probe(bcmdev); | |
1392 | if (err) | |
1393 | return err; | |
33cd149e | 1394 | |
8a920568 HG |
1395 | err = bcm_get_resources(bcmdev); |
1396 | if (err) | |
1397 | return err; | |
1398 | ||
f3863f1d MH |
1399 | if (!bcmdev->shutdown) { |
1400 | dev_warn(&serdev->dev, | |
1401 | "No reset resource, using default baud rate\n"); | |
1402 | bcmdev->oper_speed = bcmdev->init_speed; | |
1403 | } | |
1404 | ||
8bfa7e1e LW |
1405 | err = bcm_gpio_set_power(bcmdev, false); |
1406 | if (err) | |
1407 | dev_err(&serdev->dev, "Failed to power down\n"); | |
8a920568 HG |
1408 | |
1409 | return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto); | |
33cd149e LP |
1410 | } |
1411 | ||
1412 | static void bcm_serdev_remove(struct serdev_device *serdev) | |
1413 | { | |
8a920568 | 1414 | struct bcm_device *bcmdev = serdev_device_get_drvdata(serdev); |
33cd149e | 1415 | |
8a920568 | 1416 | hci_uart_unregister_device(&bcmdev->serdev_hu); |
33cd149e LP |
1417 | } |
1418 | ||
1419 | #ifdef CONFIG_OF | |
1420 | static const struct of_device_id bcm_bluetooth_of_match[] = { | |
92ffe0db | 1421 | { .compatible = "brcm,bcm20702a1" }, |
52c8c7a7 | 1422 | { .compatible = "brcm,bcm4345c5" }, |
66904555 | 1423 | { .compatible = "brcm,bcm4330-bt" }, |
33cd149e LP |
1424 | { .compatible = "brcm,bcm43438-bt" }, |
1425 | { }, | |
1426 | }; | |
1427 | MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match); | |
1428 | #endif | |
1429 | ||
1430 | static struct serdev_device_driver bcm_serdev_driver = { | |
1431 | .probe = bcm_serdev_probe, | |
1432 | .remove = bcm_serdev_remove, | |
1433 | .driver = { | |
1434 | .name = "hci_uart_bcm", | |
1435 | .of_match_table = of_match_ptr(bcm_bluetooth_of_match), | |
8a920568 HG |
1436 | .acpi_match_table = ACPI_PTR(bcm_acpi_match), |
1437 | .pm = &bcm_pm_ops, | |
33cd149e LP |
1438 | }, |
1439 | }; | |
1440 | ||
bdd8818e MH |
1441 | int __init bcm_init(void) |
1442 | { | |
33cd149e LP |
1443 | /* For now, we need to keep both platform device |
1444 | * driver (ACPI generated) and serdev driver (DT). | |
1445 | */ | |
0395ffc1 | 1446 | platform_driver_register(&bcm_driver); |
33cd149e | 1447 | serdev_device_driver_register(&bcm_serdev_driver); |
0395ffc1 | 1448 | |
bdd8818e MH |
1449 | return hci_uart_register_proto(&bcm_proto); |
1450 | } | |
1451 | ||
1452 | int __exit bcm_deinit(void) | |
1453 | { | |
0395ffc1 | 1454 | platform_driver_unregister(&bcm_driver); |
33cd149e | 1455 | serdev_device_driver_unregister(&bcm_serdev_driver); |
0395ffc1 | 1456 | |
bdd8818e MH |
1457 | return hci_uart_unregister_proto(&bcm_proto); |
1458 | } |