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Commit | Line | Data |
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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 CYT |
262 | /* wait for device to power on and come out of reset */ |
263 | usleep_range(10000, 20000); | |
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 MH |
408 | |
409 | bcm = kzalloc(sizeof(*bcm), GFP_KERNEL); | |
410 | if (!bcm) | |
411 | return -ENOMEM; | |
412 | ||
413 | skb_queue_head_init(&bcm->txq); | |
414 | ||
415 | hu->priv = bcm; | |
0395ffc1 | 416 | |
8a920568 HG |
417 | mutex_lock(&bcm_device_lock); |
418 | ||
33cd149e | 419 | if (hu->serdev) { |
8a920568 | 420 | bcm->dev = serdev_device_get_drvdata(hu->serdev); |
33cd149e LP |
421 | goto out; |
422 | } | |
423 | ||
95065a61 JH |
424 | if (!hu->tty->dev) |
425 | goto out; | |
426 | ||
0395ffc1 FD |
427 | list_for_each(p, &bcm_device_list) { |
428 | struct bcm_device *dev = list_entry(p, struct bcm_device, list); | |
429 | ||
430 | /* Retrieve saved bcm_device based on parent of the | |
431 | * platform device (saved during device probe) and | |
432 | * parent of tty device used by hci_uart | |
433 | */ | |
c0d3ce58 | 434 | if (hu->tty->dev->parent == dev->dev->parent) { |
0395ffc1 | 435 | bcm->dev = dev; |
b7a622a2 | 436 | #ifdef CONFIG_PM |
118612fb FD |
437 | dev->hu = hu; |
438 | #endif | |
0395ffc1 FD |
439 | break; |
440 | } | |
441 | } | |
442 | ||
95065a61 | 443 | out: |
8a920568 HG |
444 | if (bcm->dev) { |
445 | hu->init_speed = bcm->dev->init_speed; | |
446 | hu->oper_speed = bcm->dev->oper_speed; | |
8bfa7e1e LW |
447 | err = bcm_gpio_set_power(bcm->dev, true); |
448 | if (err) | |
449 | goto err_unset_hu; | |
8a920568 HG |
450 | } |
451 | ||
452 | mutex_unlock(&bcm_device_lock); | |
bdd8818e | 453 | return 0; |
8bfa7e1e LW |
454 | |
455 | err_unset_hu: | |
456 | #ifdef CONFIG_PM | |
e9ca0807 | 457 | if (!hu->serdev) |
8c6b8eda | 458 | bcm->dev->hu = NULL; |
8bfa7e1e | 459 | #endif |
8bfa7e1e LW |
460 | mutex_unlock(&bcm_device_lock); |
461 | hu->priv = NULL; | |
462 | kfree(bcm); | |
463 | return err; | |
bdd8818e MH |
464 | } |
465 | ||
466 | static int bcm_close(struct hci_uart *hu) | |
467 | { | |
468 | struct bcm_data *bcm = hu->priv; | |
8a920568 | 469 | struct bcm_device *bdev = NULL; |
8bfa7e1e | 470 | int err; |
bdd8818e | 471 | |
65ad07c9 | 472 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
bdd8818e | 473 | |
0395ffc1 | 474 | /* Protect bcm->dev against removal of the device or driver */ |
bb3ea16a | 475 | mutex_lock(&bcm_device_lock); |
8a920568 HG |
476 | |
477 | if (hu->serdev) { | |
8a920568 HG |
478 | bdev = serdev_device_get_drvdata(hu->serdev); |
479 | } else if (bcm_device_exists(bcm->dev)) { | |
480 | bdev = bcm->dev; | |
481 | #ifdef CONFIG_PM | |
482 | bdev->hu = NULL; | |
483 | #endif | |
484 | } | |
485 | ||
486 | if (bdev) { | |
6d83f1ee | 487 | if (IS_ENABLED(CONFIG_PM) && bdev->irq > 0) { |
c0d3ce58 HG |
488 | devm_free_irq(bdev->dev, bdev->irq, bdev); |
489 | device_init_wakeup(bdev->dev, false); | |
f4cf6b7e | 490 | pm_runtime_disable(bdev->dev); |
6cc4396c | 491 | } |
54ba69f9 | 492 | |
8bfa7e1e LW |
493 | err = bcm_gpio_set_power(bdev, false); |
494 | if (err) | |
495 | bt_dev_err(hu->hdev, "Failed to power down"); | |
496 | else | |
497 | pm_runtime_set_suspended(bdev->dev); | |
118612fb | 498 | } |
bb3ea16a | 499 | mutex_unlock(&bcm_device_lock); |
0395ffc1 | 500 | |
bdd8818e MH |
501 | skb_queue_purge(&bcm->txq); |
502 | kfree_skb(bcm->rx_skb); | |
503 | kfree(bcm); | |
504 | ||
505 | hu->priv = NULL; | |
506 | return 0; | |
507 | } | |
508 | ||
509 | static int bcm_flush(struct hci_uart *hu) | |
510 | { | |
511 | struct bcm_data *bcm = hu->priv; | |
512 | ||
65ad07c9 | 513 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
bdd8818e MH |
514 | |
515 | skb_queue_purge(&bcm->txq); | |
516 | ||
517 | return 0; | |
518 | } | |
519 | ||
520 | static int bcm_setup(struct hci_uart *hu) | |
521 | { | |
6cc4396c | 522 | struct bcm_data *bcm = hu->priv; |
6be09b48 FD |
523 | char fw_name[64]; |
524 | const struct firmware *fw; | |
960ef1d7 | 525 | unsigned int speed; |
6be09b48 FD |
526 | int err; |
527 | ||
65ad07c9 | 528 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
bdd8818e | 529 | |
075e1f5e | 530 | hu->hdev->set_diag = bcm_set_diag; |
bdd8818e MH |
531 | hu->hdev->set_bdaddr = btbcm_set_bdaddr; |
532 | ||
22ac1916 | 533 | err = btbcm_initialize(hu->hdev, fw_name, sizeof(fw_name), false); |
6be09b48 FD |
534 | if (err) |
535 | return err; | |
536 | ||
537 | err = request_firmware(&fw, fw_name, &hu->hdev->dev); | |
538 | if (err < 0) { | |
65ad07c9 | 539 | bt_dev_info(hu->hdev, "BCM: Patch %s not found", fw_name); |
6be09b48 FD |
540 | return 0; |
541 | } | |
542 | ||
543 | err = btbcm_patchram(hu->hdev, fw); | |
544 | if (err) { | |
65ad07c9 | 545 | bt_dev_info(hu->hdev, "BCM: Patch failed (%d)", err); |
6be09b48 FD |
546 | goto finalize; |
547 | } | |
548 | ||
960ef1d7 FD |
549 | /* Init speed if any */ |
550 | if (hu->init_speed) | |
551 | speed = hu->init_speed; | |
552 | else if (hu->proto->init_speed) | |
553 | speed = hu->proto->init_speed; | |
554 | else | |
555 | speed = 0; | |
556 | ||
557 | if (speed) | |
33cd149e | 558 | host_set_baudrate(hu, speed); |
960ef1d7 FD |
559 | |
560 | /* Operational speed if any */ | |
561 | if (hu->oper_speed) | |
562 | speed = hu->oper_speed; | |
563 | else if (hu->proto->oper_speed) | |
564 | speed = hu->proto->oper_speed; | |
565 | else | |
566 | speed = 0; | |
567 | ||
568 | if (speed) { | |
569 | err = bcm_set_baudrate(hu, speed); | |
61b2fc2b | 570 | if (!err) |
33cd149e | 571 | host_set_baudrate(hu, speed); |
61b2fc2b FD |
572 | } |
573 | ||
6be09b48 FD |
574 | finalize: |
575 | release_firmware(fw); | |
576 | ||
577 | err = btbcm_finalize(hu->hdev); | |
6cc4396c FD |
578 | if (err) |
579 | return err; | |
580 | ||
cdd24a20 | 581 | if (!bcm_request_irq(bcm)) |
6cc4396c | 582 | err = bcm_setup_sleep(hu); |
6be09b48 FD |
583 | |
584 | return err; | |
bdd8818e MH |
585 | } |
586 | ||
94c58132 MH |
587 | #define BCM_RECV_LM_DIAG \ |
588 | .type = BCM_LM_DIAG_PKT, \ | |
589 | .hlen = BCM_LM_DIAG_SIZE, \ | |
590 | .loff = 0, \ | |
591 | .lsize = 0, \ | |
592 | .maxlen = BCM_LM_DIAG_SIZE | |
593 | ||
01d5e44a MH |
594 | #define BCM_RECV_NULL \ |
595 | .type = BCM_NULL_PKT, \ | |
596 | .hlen = BCM_NULL_SIZE, \ | |
597 | .loff = 0, \ | |
598 | .lsize = 0, \ | |
599 | .maxlen = BCM_NULL_SIZE | |
600 | ||
22bba805 JB |
601 | #define BCM_RECV_TYPE49 \ |
602 | .type = BCM_TYPE49_PKT, \ | |
603 | .hlen = BCM_TYPE49_SIZE, \ | |
604 | .loff = 0, \ | |
605 | .lsize = 0, \ | |
606 | .maxlen = BCM_TYPE49_SIZE | |
607 | ||
608 | #define BCM_RECV_TYPE52 \ | |
609 | .type = BCM_TYPE52_PKT, \ | |
610 | .hlen = BCM_TYPE52_SIZE, \ | |
611 | .loff = 0, \ | |
612 | .lsize = 0, \ | |
613 | .maxlen = BCM_TYPE52_SIZE | |
614 | ||
79b8df93 | 615 | static const struct h4_recv_pkt bcm_recv_pkts[] = { |
94c58132 MH |
616 | { H4_RECV_ACL, .recv = hci_recv_frame }, |
617 | { H4_RECV_SCO, .recv = hci_recv_frame }, | |
618 | { H4_RECV_EVENT, .recv = hci_recv_frame }, | |
619 | { BCM_RECV_LM_DIAG, .recv = hci_recv_diag }, | |
01d5e44a | 620 | { BCM_RECV_NULL, .recv = hci_recv_diag }, |
22bba805 JB |
621 | { BCM_RECV_TYPE49, .recv = hci_recv_diag }, |
622 | { BCM_RECV_TYPE52, .recv = hci_recv_diag }, | |
79b8df93 MH |
623 | }; |
624 | ||
bdd8818e MH |
625 | static int bcm_recv(struct hci_uart *hu, const void *data, int count) |
626 | { | |
627 | struct bcm_data *bcm = hu->priv; | |
628 | ||
629 | if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) | |
630 | return -EUNATCH; | |
631 | ||
79b8df93 MH |
632 | bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count, |
633 | bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts)); | |
bdd8818e MH |
634 | if (IS_ERR(bcm->rx_skb)) { |
635 | int err = PTR_ERR(bcm->rx_skb); | |
65ad07c9 | 636 | bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err); |
37134167 | 637 | bcm->rx_skb = NULL; |
bdd8818e | 638 | return err; |
e88ab30d FD |
639 | } else if (!bcm->rx_skb) { |
640 | /* Delay auto-suspend when receiving completed packet */ | |
641 | mutex_lock(&bcm_device_lock); | |
b09c6152 HG |
642 | if (bcm->dev && bcm_device_exists(bcm->dev)) { |
643 | pm_runtime_get(bcm->dev->dev); | |
644 | pm_runtime_mark_last_busy(bcm->dev->dev); | |
645 | pm_runtime_put_autosuspend(bcm->dev->dev); | |
646 | } | |
e88ab30d | 647 | mutex_unlock(&bcm_device_lock); |
bdd8818e MH |
648 | } |
649 | ||
650 | return count; | |
651 | } | |
652 | ||
653 | static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb) | |
654 | { | |
655 | struct bcm_data *bcm = hu->priv; | |
656 | ||
65ad07c9 | 657 | bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb); |
bdd8818e MH |
658 | |
659 | /* Prepend skb with frame type */ | |
618e8bc2 | 660 | memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); |
bdd8818e MH |
661 | skb_queue_tail(&bcm->txq, skb); |
662 | ||
663 | return 0; | |
664 | } | |
665 | ||
666 | static struct sk_buff *bcm_dequeue(struct hci_uart *hu) | |
667 | { | |
668 | struct bcm_data *bcm = hu->priv; | |
e88ab30d FD |
669 | struct sk_buff *skb = NULL; |
670 | struct bcm_device *bdev = NULL; | |
671 | ||
672 | mutex_lock(&bcm_device_lock); | |
673 | ||
674 | if (bcm_device_exists(bcm->dev)) { | |
675 | bdev = bcm->dev; | |
c0d3ce58 | 676 | pm_runtime_get_sync(bdev->dev); |
e88ab30d FD |
677 | /* Shall be resumed here */ |
678 | } | |
679 | ||
680 | skb = skb_dequeue(&bcm->txq); | |
681 | ||
682 | if (bdev) { | |
c0d3ce58 HG |
683 | pm_runtime_mark_last_busy(bdev->dev); |
684 | pm_runtime_put_autosuspend(bdev->dev); | |
e88ab30d | 685 | } |
bdd8818e | 686 | |
e88ab30d FD |
687 | mutex_unlock(&bcm_device_lock); |
688 | ||
689 | return skb; | |
bdd8818e MH |
690 | } |
691 | ||
b7a622a2 FD |
692 | #ifdef CONFIG_PM |
693 | static int bcm_suspend_device(struct device *dev) | |
118612fb | 694 | { |
78277d73 | 695 | struct bcm_device *bdev = dev_get_drvdata(dev); |
8bfa7e1e | 696 | int err; |
118612fb | 697 | |
b7a622a2 | 698 | bt_dev_dbg(bdev, ""); |
917522aa | 699 | |
b7a622a2 | 700 | if (!bdev->is_suspended && bdev->hu) { |
118612fb FD |
701 | hci_uart_set_flow_control(bdev->hu, true); |
702 | ||
b7a622a2 | 703 | /* Once this returns, driver suspends BT via GPIO */ |
118612fb FD |
704 | bdev->is_suspended = true; |
705 | } | |
706 | ||
707 | /* Suspend the device */ | |
8bfa7e1e LW |
708 | err = bdev->set_device_wakeup(bdev, false); |
709 | if (err) { | |
710 | if (bdev->is_suspended && bdev->hu) { | |
711 | bdev->is_suspended = false; | |
712 | hci_uart_set_flow_control(bdev->hu, false); | |
713 | } | |
714 | return -EBUSY; | |
715 | } | |
716 | ||
3e81a4ca | 717 | bt_dev_dbg(bdev, "suspend, delaying 15 ms"); |
e4b9e5b8 | 718 | msleep(15); |
118612fb | 719 | |
b7a622a2 FD |
720 | return 0; |
721 | } | |
722 | ||
723 | static int bcm_resume_device(struct device *dev) | |
724 | { | |
78277d73 | 725 | struct bcm_device *bdev = dev_get_drvdata(dev); |
8bfa7e1e | 726 | int err; |
b7a622a2 FD |
727 | |
728 | bt_dev_dbg(bdev, ""); | |
729 | ||
8bfa7e1e LW |
730 | err = bdev->set_device_wakeup(bdev, true); |
731 | if (err) { | |
732 | dev_err(dev, "Failed to power up\n"); | |
733 | return err; | |
734 | } | |
735 | ||
3e81a4ca | 736 | bt_dev_dbg(bdev, "resume, delaying 15 ms"); |
e4b9e5b8 | 737 | msleep(15); |
b7a622a2 FD |
738 | |
739 | /* When this executes, the device has woken up already */ | |
740 | if (bdev->is_suspended && bdev->hu) { | |
741 | bdev->is_suspended = false; | |
742 | ||
743 | hci_uart_set_flow_control(bdev->hu, false); | |
744 | } | |
745 | ||
746 | return 0; | |
747 | } | |
748 | #endif | |
749 | ||
750 | #ifdef CONFIG_PM_SLEEP | |
8a920568 | 751 | /* suspend callback */ |
b7a622a2 FD |
752 | static int bcm_suspend(struct device *dev) |
753 | { | |
78277d73 | 754 | struct bcm_device *bdev = dev_get_drvdata(dev); |
b7a622a2 FD |
755 | int error; |
756 | ||
757 | bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended); | |
758 | ||
8a920568 HG |
759 | /* |
760 | * When used with a device instantiated as platform_device, bcm_suspend | |
761 | * can be called at any time as long as the platform device is bound, | |
762 | * so it should use bcm_device_lock to protect access to hci_uart | |
b7a622a2 FD |
763 | * and device_wake-up GPIO. |
764 | */ | |
765 | mutex_lock(&bcm_device_lock); | |
766 | ||
767 | if (!bdev->hu) | |
768 | goto unlock; | |
769 | ||
e88ab30d FD |
770 | if (pm_runtime_active(dev)) |
771 | bcm_suspend_device(dev); | |
b7a622a2 | 772 | |
4a59f1fa | 773 | if (device_may_wakeup(dev) && bdev->irq > 0) { |
6cc4396c FD |
774 | error = enable_irq_wake(bdev->irq); |
775 | if (!error) | |
776 | bt_dev_dbg(bdev, "BCM irq: enabled"); | |
777 | } | |
778 | ||
917522aa | 779 | unlock: |
bb3ea16a | 780 | mutex_unlock(&bcm_device_lock); |
917522aa | 781 | |
118612fb FD |
782 | return 0; |
783 | } | |
784 | ||
8a920568 | 785 | /* resume callback */ |
118612fb FD |
786 | static int bcm_resume(struct device *dev) |
787 | { | |
78277d73 | 788 | struct bcm_device *bdev = dev_get_drvdata(dev); |
8bfa7e1e | 789 | int err = 0; |
118612fb | 790 | |
65ad07c9 | 791 | bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended); |
118612fb | 792 | |
8a920568 HG |
793 | /* |
794 | * When used with a device instantiated as platform_device, bcm_resume | |
795 | * can be called at any time as long as platform device is bound, | |
796 | * so it should use bcm_device_lock to protect access to hci_uart | |
b7a622a2 FD |
797 | * and device_wake-up GPIO. |
798 | */ | |
bb3ea16a | 799 | mutex_lock(&bcm_device_lock); |
917522aa FD |
800 | |
801 | if (!bdev->hu) | |
802 | goto unlock; | |
803 | ||
4a59f1fa | 804 | if (device_may_wakeup(dev) && bdev->irq > 0) { |
6cc4396c FD |
805 | disable_irq_wake(bdev->irq); |
806 | bt_dev_dbg(bdev, "BCM irq: disabled"); | |
807 | } | |
808 | ||
8bfa7e1e | 809 | err = bcm_resume_device(dev); |
118612fb | 810 | |
917522aa | 811 | unlock: |
bb3ea16a | 812 | mutex_unlock(&bcm_device_lock); |
917522aa | 813 | |
8bfa7e1e LW |
814 | if (!err) { |
815 | pm_runtime_disable(dev); | |
816 | pm_runtime_set_active(dev); | |
817 | pm_runtime_enable(dev); | |
818 | } | |
e88ab30d | 819 | |
118612fb FD |
820 | return 0; |
821 | } | |
822 | #endif | |
823 | ||
9644e6b9 HG |
824 | static const struct acpi_gpio_params first_gpio = { 0, 0, false }; |
825 | static const struct acpi_gpio_params second_gpio = { 1, 0, false }; | |
826 | static const struct acpi_gpio_params third_gpio = { 2, 0, false }; | |
89ab37b4 DD |
827 | |
828 | static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = { | |
9644e6b9 HG |
829 | { "device-wakeup-gpios", &first_gpio, 1 }, |
830 | { "shutdown-gpios", &second_gpio, 1 }, | |
831 | { "host-wakeup-gpios", &third_gpio, 1 }, | |
89ab37b4 DD |
832 | { }, |
833 | }; | |
834 | ||
89ab37b4 | 835 | static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = { |
9644e6b9 HG |
836 | { "host-wakeup-gpios", &first_gpio, 1 }, |
837 | { "device-wakeup-gpios", &second_gpio, 1 }, | |
838 | { "shutdown-gpios", &third_gpio, 1 }, | |
0395ffc1 FD |
839 | { }, |
840 | }; | |
841 | ||
2b05393b HG |
842 | /* Some firmware reports an IRQ which does not work (wrong pin in fw table?) */ |
843 | static const struct dmi_system_id bcm_broken_irq_dmi_table[] = { | |
844 | { | |
845 | .ident = "Meegopad T08", | |
846 | .matches = { | |
847 | DMI_EXACT_MATCH(DMI_BOARD_VENDOR, | |
848 | "To be filled by OEM."), | |
849 | DMI_EXACT_MATCH(DMI_BOARD_NAME, "T3 MRD"), | |
850 | DMI_EXACT_MATCH(DMI_BOARD_VERSION, "V1.1"), | |
851 | }, | |
852 | }, | |
853 | { } | |
854 | }; | |
855 | ||
50d78bcf | 856 | #ifdef CONFIG_ACPI |
ae056908 FD |
857 | static int bcm_resource(struct acpi_resource *ares, void *data) |
858 | { | |
859 | struct bcm_device *dev = data; | |
6cc4396c FD |
860 | struct acpi_resource_extended_irq *irq; |
861 | struct acpi_resource_gpio *gpio; | |
862 | struct acpi_resource_uart_serialbus *sb; | |
863 | ||
864 | switch (ares->type) { | |
865 | case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: | |
866 | irq = &ares->data.extended_irq; | |
bb5208b3 HG |
867 | if (irq->polarity != ACPI_ACTIVE_LOW) |
868 | dev_info(dev->dev, "ACPI Interrupt resource is active-high, this is usually wrong, treating the IRQ as active-low\n"); | |
869 | dev->irq_active_low = true; | |
6cc4396c FD |
870 | break; |
871 | ||
872 | case ACPI_RESOURCE_TYPE_GPIO: | |
873 | gpio = &ares->data.gpio; | |
a4de1567 HG |
874 | if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) { |
875 | dev->gpio_int_idx = dev->gpio_count; | |
227630cc | 876 | dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW; |
a4de1567 HG |
877 | } |
878 | dev->gpio_count++; | |
6cc4396c FD |
879 | break; |
880 | ||
881 | case ACPI_RESOURCE_TYPE_SERIAL_BUS: | |
ae056908 | 882 | sb = &ares->data.uart_serial_bus; |
74183a1c | 883 | if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) { |
ae056908 | 884 | dev->init_speed = sb->default_baud_rate; |
74183a1c MH |
885 | dev->oper_speed = 4000000; |
886 | } | |
6cc4396c FD |
887 | break; |
888 | ||
889 | default: | |
890 | break; | |
ae056908 FD |
891 | } |
892 | ||
9d54fd6a | 893 | return 0; |
ae056908 | 894 | } |
4c33162c LW |
895 | |
896 | static int bcm_apple_set_device_wakeup(struct bcm_device *dev, bool awake) | |
897 | { | |
898 | if (ACPI_FAILURE(acpi_execute_simple_method(dev->btlp, NULL, !awake))) | |
899 | return -EIO; | |
900 | ||
901 | return 0; | |
902 | } | |
903 | ||
904 | static int bcm_apple_set_shutdown(struct bcm_device *dev, bool powered) | |
905 | { | |
906 | if (ACPI_FAILURE(acpi_evaluate_object(powered ? dev->btpu : dev->btpd, | |
907 | NULL, NULL, NULL))) | |
908 | return -EIO; | |
909 | ||
910 | return 0; | |
911 | } | |
912 | ||
913 | static int bcm_apple_get_resources(struct bcm_device *dev) | |
914 | { | |
915 | struct acpi_device *adev = ACPI_COMPANION(dev->dev); | |
916 | const union acpi_object *obj; | |
917 | ||
918 | if (!adev || | |
919 | ACPI_FAILURE(acpi_get_handle(adev->handle, "BTLP", &dev->btlp)) || | |
920 | ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPU", &dev->btpu)) || | |
921 | ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPD", &dev->btpd))) | |
922 | return -ENODEV; | |
923 | ||
924 | if (!acpi_dev_get_property(adev, "baud", ACPI_TYPE_BUFFER, &obj) && | |
925 | obj->buffer.length == 8) | |
926 | dev->init_speed = *(u64 *)obj->buffer.pointer; | |
927 | ||
928 | dev->set_device_wakeup = bcm_apple_set_device_wakeup; | |
929 | dev->set_shutdown = bcm_apple_set_shutdown; | |
930 | ||
931 | return 0; | |
932 | } | |
933 | #else | |
934 | static inline int bcm_apple_get_resources(struct bcm_device *dev) | |
935 | { | |
936 | return -EOPNOTSUPP; | |
937 | } | |
212d7183 | 938 | #endif /* CONFIG_ACPI */ |
ae056908 | 939 | |
8353b4a6 LW |
940 | static int bcm_gpio_set_device_wakeup(struct bcm_device *dev, bool awake) |
941 | { | |
fb2d466b | 942 | gpiod_set_value_cansleep(dev->device_wakeup, awake); |
8353b4a6 LW |
943 | return 0; |
944 | } | |
945 | ||
946 | static int bcm_gpio_set_shutdown(struct bcm_device *dev, bool powered) | |
947 | { | |
fb2d466b | 948 | gpiod_set_value_cansleep(dev->shutdown, powered); |
8353b4a6 LW |
949 | return 0; |
950 | } | |
951 | ||
55dbfcd0 CYT |
952 | /* Try a bunch of names for TXCO */ |
953 | static struct clk *bcm_get_txco(struct device *dev) | |
954 | { | |
955 | struct clk *clk; | |
956 | ||
957 | /* New explicit name */ | |
958 | clk = devm_clk_get(dev, "txco"); | |
959 | if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER) | |
960 | return clk; | |
961 | ||
962 | /* Deprecated name */ | |
963 | clk = devm_clk_get(dev, "extclk"); | |
964 | if (!IS_ERR(clk) || PTR_ERR(clk) == -EPROBE_DEFER) | |
965 | return clk; | |
966 | ||
967 | /* Original code used no name at all */ | |
968 | return devm_clk_get(dev, NULL); | |
969 | } | |
970 | ||
42ef18f0 | 971 | static int bcm_get_resources(struct bcm_device *dev) |
0395ffc1 | 972 | { |
2b05393b | 973 | const struct dmi_system_id *dmi_id; |
75d11676 | 974 | int err; |
2b05393b | 975 | |
c0d3ce58 | 976 | dev->name = dev_name(dev->dev); |
0395ffc1 | 977 | |
4c33162c LW |
978 | if (x86_apple_machine && !bcm_apple_get_resources(dev)) |
979 | return 0; | |
980 | ||
55dbfcd0 | 981 | dev->txco_clk = bcm_get_txco(dev->dev); |
89ab37b4 | 982 | |
28ac03b9 | 983 | /* Handle deferred probing */ |
55dbfcd0 CYT |
984 | if (dev->txco_clk == ERR_PTR(-EPROBE_DEFER)) |
985 | return PTR_ERR(dev->txco_clk); | |
28ac03b9 | 986 | |
8c08947b | 987 | /* Ignore all other errors as before */ |
55dbfcd0 CYT |
988 | if (IS_ERR(dev->txco_clk)) |
989 | dev->txco_clk = NULL; | |
8c08947b | 990 | |
90bc07cc CYT |
991 | dev->lpo_clk = devm_clk_get(dev->dev, "lpo"); |
992 | if (dev->lpo_clk == ERR_PTR(-EPROBE_DEFER)) | |
993 | return PTR_ERR(dev->lpo_clk); | |
994 | ||
995 | if (IS_ERR(dev->lpo_clk)) | |
996 | dev->lpo_clk = NULL; | |
997 | ||
998 | /* Check if we accidentally fetched the lpo clock twice */ | |
999 | if (dev->lpo_clk && clk_is_match(dev->lpo_clk, dev->txco_clk)) { | |
1000 | devm_clk_put(dev->dev, dev->txco_clk); | |
1001 | dev->txco_clk = NULL; | |
1002 | } | |
1003 | ||
ab2f336c SW |
1004 | dev->device_wakeup = devm_gpiod_get_optional(dev->dev, "device-wakeup", |
1005 | GPIOD_OUT_LOW); | |
62aaefa7 UKK |
1006 | if (IS_ERR(dev->device_wakeup)) |
1007 | return PTR_ERR(dev->device_wakeup); | |
0395ffc1 | 1008 | |
ab2f336c SW |
1009 | dev->shutdown = devm_gpiod_get_optional(dev->dev, "shutdown", |
1010 | GPIOD_OUT_LOW); | |
62aaefa7 UKK |
1011 | if (IS_ERR(dev->shutdown)) |
1012 | return PTR_ERR(dev->shutdown); | |
0395ffc1 | 1013 | |
8353b4a6 LW |
1014 | dev->set_device_wakeup = bcm_gpio_set_device_wakeup; |
1015 | dev->set_shutdown = bcm_gpio_set_shutdown; | |
1016 | ||
75d11676 CYT |
1017 | dev->supplies[0].supply = "vbat"; |
1018 | dev->supplies[1].supply = "vddio"; | |
1019 | err = devm_regulator_bulk_get(dev->dev, BCM_NUM_SUPPLIES, | |
1020 | dev->supplies); | |
1021 | if (err) | |
1022 | return err; | |
1023 | ||
6cc4396c | 1024 | /* IRQ can be declared in ACPI table as Interrupt or GpioInt */ |
6cc4396c FD |
1025 | if (dev->irq <= 0) { |
1026 | struct gpio_desc *gpio; | |
1027 | ||
c0d3ce58 | 1028 | gpio = devm_gpiod_get_optional(dev->dev, "host-wakeup", |
6cc4396c FD |
1029 | GPIOD_IN); |
1030 | if (IS_ERR(gpio)) | |
1031 | return PTR_ERR(gpio); | |
1032 | ||
1033 | dev->irq = gpiod_to_irq(gpio); | |
1034 | } | |
1035 | ||
2b05393b HG |
1036 | dmi_id = dmi_first_match(bcm_broken_irq_dmi_table); |
1037 | if (dmi_id) { | |
1038 | dev_info(dev->dev, "%s: Has a broken IRQ config, disabling IRQ support / runtime-pm\n", | |
1039 | dmi_id->ident); | |
1040 | dev->irq = 0; | |
1041 | } | |
1042 | ||
5954cdf1 | 1043 | dev_dbg(dev->dev, "BCM irq: %d\n", dev->irq); |
212d7183 AS |
1044 | return 0; |
1045 | } | |
1046 | ||
1047 | #ifdef CONFIG_ACPI | |
1048 | static int bcm_acpi_probe(struct bcm_device *dev) | |
1049 | { | |
212d7183 | 1050 | LIST_HEAD(resources); |
212d7183 | 1051 | const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios; |
9d54fd6a | 1052 | struct resource_entry *entry; |
212d7183 AS |
1053 | int ret; |
1054 | ||
ae056908 | 1055 | /* Retrieve UART ACPI info */ |
a4de1567 | 1056 | dev->gpio_int_idx = -1; |
c0d3ce58 | 1057 | ret = acpi_dev_get_resources(ACPI_COMPANION(dev->dev), |
e98d6d62 | 1058 | &resources, bcm_resource, dev); |
5be00284 JN |
1059 | if (ret < 0) |
1060 | return ret; | |
9d54fd6a HG |
1061 | |
1062 | resource_list_for_each_entry(entry, &resources) { | |
1063 | if (resource_type(entry->res) == IORESOURCE_IRQ) { | |
1064 | dev->irq = entry->res->start; | |
1065 | break; | |
1066 | } | |
1067 | } | |
09dbf1b7 | 1068 | acpi_dev_free_resource_list(&resources); |
ae056908 | 1069 | |
a4de1567 HG |
1070 | /* If the DSDT uses an Interrupt resource for the IRQ, then there are |
1071 | * only 2 GPIO resources, we use the irq-last mapping for this, since | |
1072 | * we already have an irq the 3th / last mapping will not be used. | |
1073 | */ | |
1074 | if (dev->irq) | |
1075 | gpio_mapping = acpi_bcm_int_last_gpios; | |
1076 | else if (dev->gpio_int_idx == 0) | |
1077 | gpio_mapping = acpi_bcm_int_first_gpios; | |
1078 | else if (dev->gpio_int_idx == 2) | |
1079 | gpio_mapping = acpi_bcm_int_last_gpios; | |
1080 | else | |
1081 | dev_warn(dev->dev, "Unexpected ACPI gpio_int_idx: %d\n", | |
1082 | dev->gpio_int_idx); | |
1083 | ||
1084 | /* Warn if our expectations are not met. */ | |
1085 | if (dev->gpio_count != (dev->irq ? 2 : 3)) | |
1086 | dev_warn(dev->dev, "Unexpected number of ACPI GPIOs: %d\n", | |
1087 | dev->gpio_count); | |
1088 | ||
1089 | ret = devm_acpi_dev_add_driver_gpios(dev->dev, gpio_mapping); | |
1090 | if (ret) | |
1091 | return ret; | |
1092 | ||
e09070c5 HG |
1093 | if (irq_polarity != -1) { |
1094 | dev->irq_active_low = irq_polarity; | |
1095 | dev_warn(dev->dev, "Overwriting IRQ polarity to active %s by module-param\n", | |
1096 | dev->irq_active_low ? "low" : "high"); | |
5cebdfea FD |
1097 | } |
1098 | ||
0395ffc1 FD |
1099 | return 0; |
1100 | } | |
50d78bcf FD |
1101 | #else |
1102 | static int bcm_acpi_probe(struct bcm_device *dev) | |
1103 | { | |
1104 | return -EINVAL; | |
1105 | } | |
1106 | #endif /* CONFIG_ACPI */ | |
0395ffc1 | 1107 | |
8a920568 HG |
1108 | static int bcm_of_probe(struct bcm_device *bdev) |
1109 | { | |
1110 | device_property_read_u32(bdev->dev, "max-speed", &bdev->oper_speed); | |
1111 | return 0; | |
1112 | } | |
1113 | ||
0395ffc1 FD |
1114 | static int bcm_probe(struct platform_device *pdev) |
1115 | { | |
1116 | struct bcm_device *dev; | |
0395ffc1 FD |
1117 | int ret; |
1118 | ||
1119 | dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); | |
1120 | if (!dev) | |
1121 | return -ENOMEM; | |
1122 | ||
c0d3ce58 | 1123 | dev->dev = &pdev->dev; |
4a56f891 | 1124 | dev->irq = platform_get_irq(pdev, 0); |
0395ffc1 | 1125 | |
201762e2 | 1126 | if (has_acpi_companion(&pdev->dev)) { |
212d7183 | 1127 | ret = bcm_acpi_probe(dev); |
201762e2 HG |
1128 | if (ret) |
1129 | return ret; | |
1130 | } | |
1131 | ||
42ef18f0 | 1132 | ret = bcm_get_resources(dev); |
4d1c4558 JN |
1133 | if (ret) |
1134 | return ret; | |
0395ffc1 FD |
1135 | |
1136 | platform_set_drvdata(pdev, dev); | |
1137 | ||
1138 | dev_info(&pdev->dev, "%s device registered.\n", dev->name); | |
1139 | ||
1140 | /* Place this instance on the device list */ | |
bb3ea16a | 1141 | mutex_lock(&bcm_device_lock); |
0395ffc1 | 1142 | list_add_tail(&dev->list, &bcm_device_list); |
bb3ea16a | 1143 | mutex_unlock(&bcm_device_lock); |
0395ffc1 | 1144 | |
8bfa7e1e LW |
1145 | ret = bcm_gpio_set_power(dev, false); |
1146 | if (ret) | |
1147 | dev_err(&pdev->dev, "Failed to power down\n"); | |
0395ffc1 FD |
1148 | |
1149 | return 0; | |
1150 | } | |
1151 | ||
1152 | static int bcm_remove(struct platform_device *pdev) | |
1153 | { | |
1154 | struct bcm_device *dev = platform_get_drvdata(pdev); | |
1155 | ||
bb3ea16a | 1156 | mutex_lock(&bcm_device_lock); |
0395ffc1 | 1157 | list_del(&dev->list); |
bb3ea16a | 1158 | mutex_unlock(&bcm_device_lock); |
0395ffc1 | 1159 | |
0395ffc1 FD |
1160 | dev_info(&pdev->dev, "%s device unregistered.\n", dev->name); |
1161 | ||
1162 | return 0; | |
1163 | } | |
1164 | ||
bdd8818e MH |
1165 | static const struct hci_uart_proto bcm_proto = { |
1166 | .id = HCI_UART_BCM, | |
143f0a28 | 1167 | .name = "Broadcom", |
aee61f7a | 1168 | .manufacturer = 15, |
61b2fc2b | 1169 | .init_speed = 115200, |
bdd8818e MH |
1170 | .open = bcm_open, |
1171 | .close = bcm_close, | |
1172 | .flush = bcm_flush, | |
1173 | .setup = bcm_setup, | |
61b2fc2b | 1174 | .set_baudrate = bcm_set_baudrate, |
bdd8818e MH |
1175 | .recv = bcm_recv, |
1176 | .enqueue = bcm_enqueue, | |
1177 | .dequeue = bcm_dequeue, | |
1178 | }; | |
1179 | ||
0395ffc1 FD |
1180 | #ifdef CONFIG_ACPI |
1181 | static const struct acpi_device_id bcm_acpi_match[] = { | |
61121502 HG |
1182 | { "BCM2E00" }, |
1183 | { "BCM2E01" }, | |
1184 | { "BCM2E02" }, | |
1185 | { "BCM2E03" }, | |
1186 | { "BCM2E04" }, | |
1187 | { "BCM2E05" }, | |
1188 | { "BCM2E06" }, | |
1189 | { "BCM2E07" }, | |
1190 | { "BCM2E08" }, | |
1191 | { "BCM2E09" }, | |
1192 | { "BCM2E0A" }, | |
1193 | { "BCM2E0B" }, | |
1194 | { "BCM2E0C" }, | |
1195 | { "BCM2E0D" }, | |
1196 | { "BCM2E0E" }, | |
1197 | { "BCM2E0F" }, | |
1198 | { "BCM2E10" }, | |
1199 | { "BCM2E11" }, | |
1200 | { "BCM2E12" }, | |
1201 | { "BCM2E13" }, | |
1202 | { "BCM2E14" }, | |
1203 | { "BCM2E15" }, | |
1204 | { "BCM2E16" }, | |
1205 | { "BCM2E17" }, | |
1206 | { "BCM2E18" }, | |
1207 | { "BCM2E19" }, | |
a4de1567 | 1208 | { "BCM2E1A" }, |
61121502 HG |
1209 | { "BCM2E1B" }, |
1210 | { "BCM2E1C" }, | |
1211 | { "BCM2E1D" }, | |
1212 | { "BCM2E1F" }, | |
1213 | { "BCM2E20" }, | |
1214 | { "BCM2E21" }, | |
1215 | { "BCM2E22" }, | |
1216 | { "BCM2E23" }, | |
1217 | { "BCM2E24" }, | |
1218 | { "BCM2E25" }, | |
1219 | { "BCM2E26" }, | |
1220 | { "BCM2E27" }, | |
1221 | { "BCM2E28" }, | |
1222 | { "BCM2E29" }, | |
1223 | { "BCM2E2A" }, | |
1224 | { "BCM2E2B" }, | |
1225 | { "BCM2E2C" }, | |
1226 | { "BCM2E2D" }, | |
1227 | { "BCM2E2E" }, | |
1228 | { "BCM2E2F" }, | |
1229 | { "BCM2E30" }, | |
1230 | { "BCM2E31" }, | |
1231 | { "BCM2E32" }, | |
1232 | { "BCM2E33" }, | |
1233 | { "BCM2E34" }, | |
1234 | { "BCM2E35" }, | |
1235 | { "BCM2E36" }, | |
1236 | { "BCM2E37" }, | |
a4de1567 HG |
1237 | { "BCM2E38" }, |
1238 | { "BCM2E39" }, | |
1239 | { "BCM2E3A" }, | |
61121502 HG |
1240 | { "BCM2E3B" }, |
1241 | { "BCM2E3C" }, | |
a4de1567 | 1242 | { "BCM2E3D" }, |
61121502 | 1243 | { "BCM2E3E" }, |
a4de1567 HG |
1244 | { "BCM2E3F" }, |
1245 | { "BCM2E40" }, | |
61121502 HG |
1246 | { "BCM2E41" }, |
1247 | { "BCM2E42" }, | |
1248 | { "BCM2E43" }, | |
1249 | { "BCM2E44" }, | |
1250 | { "BCM2E45" }, | |
1251 | { "BCM2E46" }, | |
1252 | { "BCM2E47" }, | |
1253 | { "BCM2E48" }, | |
1254 | { "BCM2E49" }, | |
1255 | { "BCM2E4A" }, | |
1256 | { "BCM2E4B" }, | |
1257 | { "BCM2E4C" }, | |
1258 | { "BCM2E4D" }, | |
1259 | { "BCM2E4E" }, | |
1260 | { "BCM2E4F" }, | |
1261 | { "BCM2E50" }, | |
1262 | { "BCM2E51" }, | |
1263 | { "BCM2E52" }, | |
1264 | { "BCM2E53" }, | |
a4de1567 HG |
1265 | { "BCM2E54" }, |
1266 | { "BCM2E55" }, | |
61121502 HG |
1267 | { "BCM2E56" }, |
1268 | { "BCM2E57" }, | |
1269 | { "BCM2E58" }, | |
1270 | { "BCM2E59" }, | |
1271 | { "BCM2E5A" }, | |
1272 | { "BCM2E5B" }, | |
1273 | { "BCM2E5C" }, | |
1274 | { "BCM2E5D" }, | |
1275 | { "BCM2E5E" }, | |
1276 | { "BCM2E5F" }, | |
1277 | { "BCM2E60" }, | |
1278 | { "BCM2E61" }, | |
1279 | { "BCM2E62" }, | |
1280 | { "BCM2E63" }, | |
a4de1567 HG |
1281 | { "BCM2E64" }, |
1282 | { "BCM2E65" }, | |
61121502 | 1283 | { "BCM2E66" }, |
a4de1567 | 1284 | { "BCM2E67" }, |
61121502 HG |
1285 | { "BCM2E68" }, |
1286 | { "BCM2E69" }, | |
1287 | { "BCM2E6B" }, | |
1288 | { "BCM2E6D" }, | |
1289 | { "BCM2E6E" }, | |
1290 | { "BCM2E6F" }, | |
1291 | { "BCM2E70" }, | |
a4de1567 HG |
1292 | { "BCM2E71" }, |
1293 | { "BCM2E72" }, | |
61121502 | 1294 | { "BCM2E73" }, |
a4de1567 | 1295 | { "BCM2E74" }, |
61121502 HG |
1296 | { "BCM2E75" }, |
1297 | { "BCM2E76" }, | |
1298 | { "BCM2E77" }, | |
1299 | { "BCM2E78" }, | |
1300 | { "BCM2E79" }, | |
1301 | { "BCM2E7A" }, | |
a4de1567 HG |
1302 | { "BCM2E7B" }, |
1303 | { "BCM2E7C" }, | |
61121502 | 1304 | { "BCM2E7D" }, |
a4de1567 | 1305 | { "BCM2E7E" }, |
61121502 HG |
1306 | { "BCM2E7F" }, |
1307 | { "BCM2E80" }, | |
1308 | { "BCM2E81" }, | |
1309 | { "BCM2E82" }, | |
a4de1567 HG |
1310 | { "BCM2E83" }, |
1311 | { "BCM2E84" }, | |
61121502 HG |
1312 | { "BCM2E85" }, |
1313 | { "BCM2E86" }, | |
1314 | { "BCM2E87" }, | |
1315 | { "BCM2E88" }, | |
1316 | { "BCM2E89" }, | |
1317 | { "BCM2E8A" }, | |
1318 | { "BCM2E8B" }, | |
1319 | { "BCM2E8C" }, | |
1320 | { "BCM2E8D" }, | |
1321 | { "BCM2E8E" }, | |
a4de1567 | 1322 | { "BCM2E90" }, |
61121502 HG |
1323 | { "BCM2E92" }, |
1324 | { "BCM2E93" }, | |
1325 | { "BCM2E94" }, | |
a4de1567 HG |
1326 | { "BCM2E95" }, |
1327 | { "BCM2E96" }, | |
61121502 HG |
1328 | { "BCM2E97" }, |
1329 | { "BCM2E98" }, | |
1330 | { "BCM2E99" }, | |
1331 | { "BCM2E9A" }, | |
1332 | { "BCM2E9B" }, | |
1333 | { "BCM2E9C" }, | |
1334 | { "BCM2E9D" }, | |
1335 | { "BCM2EA0" }, | |
1336 | { "BCM2EA1" }, | |
1337 | { "BCM2EA2" }, | |
1338 | { "BCM2EA3" }, | |
a4de1567 | 1339 | { "BCM2EA4" }, |
61121502 HG |
1340 | { "BCM2EA5" }, |
1341 | { "BCM2EA6" }, | |
1342 | { "BCM2EA7" }, | |
1343 | { "BCM2EA8" }, | |
1344 | { "BCM2EA9" }, | |
a4de1567 | 1345 | { "BCM2EAA" }, |
61121502 HG |
1346 | { "BCM2EAB" }, |
1347 | { "BCM2EAC" }, | |
0395ffc1 FD |
1348 | { }, |
1349 | }; | |
1350 | MODULE_DEVICE_TABLE(acpi, bcm_acpi_match); | |
1351 | #endif | |
1352 | ||
8a920568 | 1353 | /* suspend and resume callbacks */ |
e88ab30d FD |
1354 | static const struct dev_pm_ops bcm_pm_ops = { |
1355 | SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume) | |
1356 | SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL) | |
1357 | }; | |
118612fb | 1358 | |
0395ffc1 FD |
1359 | static struct platform_driver bcm_driver = { |
1360 | .probe = bcm_probe, | |
1361 | .remove = bcm_remove, | |
1362 | .driver = { | |
1363 | .name = "hci_bcm", | |
1364 | .acpi_match_table = ACPI_PTR(bcm_acpi_match), | |
118612fb | 1365 | .pm = &bcm_pm_ops, |
0395ffc1 FD |
1366 | }, |
1367 | }; | |
1368 | ||
33cd149e LP |
1369 | static int bcm_serdev_probe(struct serdev_device *serdev) |
1370 | { | |
8a920568 | 1371 | struct bcm_device *bcmdev; |
33cd149e LP |
1372 | int err; |
1373 | ||
1374 | bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL); | |
1375 | if (!bcmdev) | |
1376 | return -ENOMEM; | |
1377 | ||
8a920568 | 1378 | bcmdev->dev = &serdev->dev; |
81a19053 | 1379 | #ifdef CONFIG_PM |
8a920568 | 1380 | bcmdev->hu = &bcmdev->serdev_hu; |
81a19053 | 1381 | #endif |
8a920568 | 1382 | bcmdev->serdev_hu.serdev = serdev; |
33cd149e LP |
1383 | serdev_device_set_drvdata(serdev, bcmdev); |
1384 | ||
8a920568 HG |
1385 | if (has_acpi_companion(&serdev->dev)) |
1386 | err = bcm_acpi_probe(bcmdev); | |
1387 | else | |
1388 | err = bcm_of_probe(bcmdev); | |
1389 | if (err) | |
1390 | return err; | |
33cd149e | 1391 | |
8a920568 HG |
1392 | err = bcm_get_resources(bcmdev); |
1393 | if (err) | |
1394 | return err; | |
1395 | ||
f3863f1d MH |
1396 | if (!bcmdev->shutdown) { |
1397 | dev_warn(&serdev->dev, | |
1398 | "No reset resource, using default baud rate\n"); | |
1399 | bcmdev->oper_speed = bcmdev->init_speed; | |
1400 | } | |
1401 | ||
8bfa7e1e LW |
1402 | err = bcm_gpio_set_power(bcmdev, false); |
1403 | if (err) | |
1404 | dev_err(&serdev->dev, "Failed to power down\n"); | |
8a920568 HG |
1405 | |
1406 | return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto); | |
33cd149e LP |
1407 | } |
1408 | ||
1409 | static void bcm_serdev_remove(struct serdev_device *serdev) | |
1410 | { | |
8a920568 | 1411 | struct bcm_device *bcmdev = serdev_device_get_drvdata(serdev); |
33cd149e | 1412 | |
8a920568 | 1413 | hci_uart_unregister_device(&bcmdev->serdev_hu); |
33cd149e LP |
1414 | } |
1415 | ||
1416 | #ifdef CONFIG_OF | |
1417 | static const struct of_device_id bcm_bluetooth_of_match[] = { | |
92ffe0db | 1418 | { .compatible = "brcm,bcm20702a1" }, |
66904555 | 1419 | { .compatible = "brcm,bcm4330-bt" }, |
33cd149e LP |
1420 | { .compatible = "brcm,bcm43438-bt" }, |
1421 | { }, | |
1422 | }; | |
1423 | MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match); | |
1424 | #endif | |
1425 | ||
1426 | static struct serdev_device_driver bcm_serdev_driver = { | |
1427 | .probe = bcm_serdev_probe, | |
1428 | .remove = bcm_serdev_remove, | |
1429 | .driver = { | |
1430 | .name = "hci_uart_bcm", | |
1431 | .of_match_table = of_match_ptr(bcm_bluetooth_of_match), | |
8a920568 HG |
1432 | .acpi_match_table = ACPI_PTR(bcm_acpi_match), |
1433 | .pm = &bcm_pm_ops, | |
33cd149e LP |
1434 | }, |
1435 | }; | |
1436 | ||
bdd8818e MH |
1437 | int __init bcm_init(void) |
1438 | { | |
33cd149e LP |
1439 | /* For now, we need to keep both platform device |
1440 | * driver (ACPI generated) and serdev driver (DT). | |
1441 | */ | |
0395ffc1 | 1442 | platform_driver_register(&bcm_driver); |
33cd149e | 1443 | serdev_device_driver_register(&bcm_serdev_driver); |
0395ffc1 | 1444 | |
bdd8818e MH |
1445 | return hci_uart_register_proto(&bcm_proto); |
1446 | } | |
1447 | ||
1448 | int __exit bcm_deinit(void) | |
1449 | { | |
0395ffc1 | 1450 | platform_driver_unregister(&bcm_driver); |
33cd149e | 1451 | serdev_device_driver_unregister(&bcm_serdev_driver); |
0395ffc1 | 1452 | |
bdd8818e MH |
1453 | return hci_uart_unregister_proto(&bcm_proto); |
1454 | } |