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