Marcel Holtmann | e9a2dd2 | 2015-04-04 16:13:03 -0700 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * Bluetooth HCI UART driver for Broadcom devices |
| 4 | * |
| 5 | * Copyright (C) 2015 Intel Corporation |
| 6 | * |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 21 | * |
| 22 | */ |
| 23 | |
| 24 | #include <linux/kernel.h> |
| 25 | #include <linux/errno.h> |
| 26 | #include <linux/skbuff.h> |
Frederic Danis | 18aeb44 | 2015-05-28 11:25:01 +0200 | [diff] [blame] | 27 | #include <linux/firmware.h> |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 28 | #include <linux/module.h> |
| 29 | #include <linux/acpi.h> |
Loic Poulain | 33cd149 | 2017-08-17 19:59:51 +0200 | [diff] [blame] | 30 | #include <linux/of.h> |
| 31 | #include <linux/property.h> |
Lukas Wunner | 4c33162 | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 32 | #include <linux/platform_data/x86/apple.h> |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 33 | #include <linux/platform_device.h> |
| 34 | #include <linux/clk.h> |
| 35 | #include <linux/gpio/consumer.h> |
| 36 | #include <linux/tty.h> |
Frederic Danis | 6cc4396 | 2015-09-04 15:35:44 +0200 | [diff] [blame] | 37 | #include <linux/interrupt.h> |
Frederic Danis | 5cebdfe | 2015-09-23 18:18:08 +0200 | [diff] [blame] | 38 | #include <linux/dmi.h> |
Frederic Danis | e88ab30 | 2015-09-23 18:18:11 +0200 | [diff] [blame] | 39 | #include <linux/pm_runtime.h> |
Loic Poulain | 33cd149 | 2017-08-17 19:59:51 +0200 | [diff] [blame] | 40 | #include <linux/serdev.h> |
Marcel Holtmann | e9a2dd2 | 2015-04-04 16:13:03 -0700 | [diff] [blame] | 41 | |
| 42 | #include <net/bluetooth/bluetooth.h> |
| 43 | #include <net/bluetooth/hci_core.h> |
| 44 | |
Marcel Holtmann | bdd8818 | 2015-04-05 22:52:18 -0700 | [diff] [blame] | 45 | #include "btbcm.h" |
Marcel Holtmann | e9a2dd2 | 2015-04-04 16:13:03 -0700 | [diff] [blame] | 46 | #include "hci_uart.h" |
Marcel Holtmann | bdd8818 | 2015-04-05 22:52:18 -0700 | [diff] [blame] | 47 | |
Marcel Holtmann | 01d5e44 | 2017-08-17 21:41:09 +0200 | [diff] [blame] | 48 | #define BCM_NULL_PKT 0x00 |
| 49 | #define BCM_NULL_SIZE 0 |
| 50 | |
Marcel Holtmann | 94c5813 | 2015-10-07 19:12:54 +0200 | [diff] [blame] | 51 | #define BCM_LM_DIAG_PKT 0x07 |
| 52 | #define BCM_LM_DIAG_SIZE 63 |
| 53 | |
Frederic Danis | e88ab30 | 2015-09-23 18:18:11 +0200 | [diff] [blame] | 54 | #define BCM_AUTOSUSPEND_DELAY 5000 /* default autosleep delay */ |
| 55 | |
Lukas Wunner | b7c2aba | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 56 | /** |
| 57 | * struct bcm_device - device driver resources |
| 58 | * @serdev_hu: HCI UART controller struct |
| 59 | * @list: bcm_device_list node |
| 60 | * @dev: physical UART slave |
| 61 | * @name: device name logged by bt_dev_*() functions |
| 62 | * @device_wakeup: BT_WAKE pin, |
| 63 | * assert = Bluetooth device must wake up or remain awake, |
| 64 | * deassert = Bluetooth device may sleep when sleep criteria are met |
| 65 | * @shutdown: BT_REG_ON pin, |
| 66 | * power up or power down Bluetooth device internal regulators |
Lukas Wunner | 8353b4a | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 67 | * @set_device_wakeup: callback to toggle BT_WAKE pin |
Lukas Wunner | 4c33162 | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 68 | * either by accessing @device_wakeup or by calling @btlp |
Lukas Wunner | 8353b4a | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 69 | * @set_shutdown: callback to toggle BT_REG_ON pin |
Lukas Wunner | 4c33162 | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 70 | * either by accessing @shutdown or by calling @btpu/@btpd |
| 71 | * @btlp: Apple ACPI method to toggle BT_WAKE pin ("Bluetooth Low Power") |
| 72 | * @btpu: Apple ACPI method to drive BT_REG_ON pin high ("Bluetooth Power Up") |
| 73 | * @btpd: Apple ACPI method to drive BT_REG_ON pin low ("Bluetooth Power Down") |
Lukas Wunner | b7c2aba | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 74 | * @clk: clock used by Bluetooth device |
| 75 | * @clk_enabled: whether @clk is prepared and enabled |
| 76 | * @init_speed: default baudrate of Bluetooth device; |
| 77 | * the host UART is initially set to this baudrate so that |
| 78 | * it can configure the Bluetooth device for @oper_speed |
| 79 | * @oper_speed: preferred baudrate of Bluetooth device; |
| 80 | * set to 0 if @init_speed is already the preferred baudrate |
| 81 | * @irq: interrupt triggered by HOST_WAKE_BT pin |
| 82 | * @irq_active_low: whether @irq is active low |
| 83 | * @hu: pointer to HCI UART controller struct, |
| 84 | * used to disable flow control during runtime suspend and system sleep |
| 85 | * @is_suspended: whether flow control is currently disabled |
| 86 | */ |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 87 | struct bcm_device { |
Hans de Goede | 8a92056 | 2017-10-04 20:43:43 +0200 | [diff] [blame] | 88 | /* Must be the first member, hci_serdev.c expects this. */ |
| 89 | struct hci_uart serdev_hu; |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 90 | struct list_head list; |
| 91 | |
Hans de Goede | c0d3ce5 | 2017-10-04 20:43:39 +0200 | [diff] [blame] | 92 | struct device *dev; |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 93 | |
| 94 | const char *name; |
| 95 | struct gpio_desc *device_wakeup; |
| 96 | struct gpio_desc *shutdown; |
Lukas Wunner | 8353b4a | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 97 | int (*set_device_wakeup)(struct bcm_device *, bool); |
| 98 | int (*set_shutdown)(struct bcm_device *, bool); |
Lukas Wunner | 4c33162 | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 99 | #ifdef CONFIG_ACPI |
| 100 | acpi_handle btlp, btpu, btpd; |
| 101 | #endif |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 102 | |
| 103 | struct clk *clk; |
| 104 | bool clk_enabled; |
Frederic Danis | ae05690 | 2015-08-11 16:35:37 +0200 | [diff] [blame] | 105 | |
| 106 | u32 init_speed; |
Marcel Holtmann | 74183a1 | 2017-08-16 09:53:30 +0200 | [diff] [blame] | 107 | u32 oper_speed; |
Frederic Danis | 6cc4396 | 2015-09-04 15:35:44 +0200 | [diff] [blame] | 108 | int irq; |
Hans de Goede | 227630c | 2017-10-04 20:43:36 +0200 | [diff] [blame] | 109 | bool irq_active_low; |
Frederic Danis | 118612f | 2015-08-11 16:35:38 +0200 | [diff] [blame] | 110 | |
Frederic Danis | b7a622a | 2015-09-23 18:18:09 +0200 | [diff] [blame] | 111 | #ifdef CONFIG_PM |
Frederic Danis | 118612f | 2015-08-11 16:35:38 +0200 | [diff] [blame] | 112 | struct hci_uart *hu; |
Lukas Wunner | b7c2aba | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 113 | bool is_suspended; |
Frederic Danis | 118612f | 2015-08-11 16:35:38 +0200 | [diff] [blame] | 114 | #endif |
Marcel Holtmann | bdd8818 | 2015-04-05 22:52:18 -0700 | [diff] [blame] | 115 | }; |
| 116 | |
Loic Poulain | 33cd149 | 2017-08-17 19:59:51 +0200 | [diff] [blame] | 117 | /* generic bcm uart resources */ |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 118 | struct bcm_data { |
| 119 | struct sk_buff *rx_skb; |
| 120 | struct sk_buff_head txq; |
| 121 | |
| 122 | struct bcm_device *dev; |
| 123 | }; |
| 124 | |
| 125 | /* List of BCM BT UART devices */ |
Frederic Danis | bb3ea16 | 2015-09-01 12:13:35 +0200 | [diff] [blame] | 126 | static DEFINE_MUTEX(bcm_device_lock); |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 127 | static LIST_HEAD(bcm_device_list); |
| 128 | |
Loic Poulain | 33cd149 | 2017-08-17 19:59:51 +0200 | [diff] [blame] | 129 | static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed) |
| 130 | { |
| 131 | if (hu->serdev) |
| 132 | serdev_device_set_baudrate(hu->serdev, speed); |
| 133 | else |
| 134 | hci_uart_set_baudrate(hu, speed); |
| 135 | } |
| 136 | |
Frederic Danis | 61b2fc2 | 2015-06-09 16:15:37 +0200 | [diff] [blame] | 137 | static int bcm_set_baudrate(struct hci_uart *hu, unsigned int speed) |
| 138 | { |
| 139 | struct hci_dev *hdev = hu->hdev; |
| 140 | struct sk_buff *skb; |
| 141 | struct bcm_update_uart_baud_rate param; |
| 142 | |
| 143 | if (speed > 3000000) { |
| 144 | struct bcm_write_uart_clock_setting clock; |
| 145 | |
| 146 | clock.type = BCM_UART_CLOCK_48MHZ; |
| 147 | |
Frederic Danis | 65ad07c | 2015-09-01 12:13:36 +0200 | [diff] [blame] | 148 | bt_dev_dbg(hdev, "Set Controller clock (%d)", clock.type); |
Frederic Danis | 61b2fc2 | 2015-06-09 16:15:37 +0200 | [diff] [blame] | 149 | |
| 150 | /* This Broadcom specific command changes the UART's controller |
| 151 | * clock for baud rate > 3000000. |
| 152 | */ |
| 153 | skb = __hci_cmd_sync(hdev, 0xfc45, 1, &clock, HCI_INIT_TIMEOUT); |
| 154 | if (IS_ERR(skb)) { |
| 155 | int err = PTR_ERR(skb); |
Frederic Danis | 65ad07c | 2015-09-01 12:13:36 +0200 | [diff] [blame] | 156 | bt_dev_err(hdev, "BCM: failed to write clock (%d)", |
| 157 | err); |
Frederic Danis | 61b2fc2 | 2015-06-09 16:15:37 +0200 | [diff] [blame] | 158 | return err; |
| 159 | } |
| 160 | |
| 161 | kfree_skb(skb); |
| 162 | } |
| 163 | |
Frederic Danis | 65ad07c | 2015-09-01 12:13:36 +0200 | [diff] [blame] | 164 | bt_dev_dbg(hdev, "Set Controller UART speed to %d bit/s", speed); |
Frederic Danis | 61b2fc2 | 2015-06-09 16:15:37 +0200 | [diff] [blame] | 165 | |
| 166 | param.zero = cpu_to_le16(0); |
| 167 | param.baud_rate = cpu_to_le32(speed); |
| 168 | |
| 169 | /* This Broadcom specific command changes the UART's controller baud |
| 170 | * rate. |
| 171 | */ |
| 172 | skb = __hci_cmd_sync(hdev, 0xfc18, sizeof(param), ¶m, |
| 173 | HCI_INIT_TIMEOUT); |
| 174 | if (IS_ERR(skb)) { |
| 175 | int err = PTR_ERR(skb); |
Frederic Danis | 65ad07c | 2015-09-01 12:13:36 +0200 | [diff] [blame] | 176 | bt_dev_err(hdev, "BCM: failed to write update baudrate (%d)", |
| 177 | err); |
Frederic Danis | 61b2fc2 | 2015-06-09 16:15:37 +0200 | [diff] [blame] | 178 | return err; |
| 179 | } |
| 180 | |
| 181 | kfree_skb(skb); |
| 182 | |
| 183 | return 0; |
| 184 | } |
| 185 | |
Frederic Danis | 917522a | 2015-08-28 15:44:00 +0200 | [diff] [blame] | 186 | /* bcm_device_exists should be protected by bcm_device_lock */ |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 187 | static bool bcm_device_exists(struct bcm_device *device) |
| 188 | { |
| 189 | struct list_head *p; |
| 190 | |
Arnd Bergmann | 81a1905 | 2017-10-11 15:46:21 +0200 | [diff] [blame] | 191 | #ifdef CONFIG_PM |
Hans de Goede | 8a92056 | 2017-10-04 20:43:43 +0200 | [diff] [blame] | 192 | /* Devices using serdev always exist */ |
| 193 | if (device && device->hu && device->hu->serdev) |
| 194 | return true; |
Arnd Bergmann | 81a1905 | 2017-10-11 15:46:21 +0200 | [diff] [blame] | 195 | #endif |
Hans de Goede | 8a92056 | 2017-10-04 20:43:43 +0200 | [diff] [blame] | 196 | |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 197 | list_for_each(p, &bcm_device_list) { |
| 198 | struct bcm_device *dev = list_entry(p, struct bcm_device, list); |
| 199 | |
| 200 | if (device == dev) |
| 201 | return true; |
| 202 | } |
| 203 | |
| 204 | return false; |
| 205 | } |
| 206 | |
| 207 | static int bcm_gpio_set_power(struct bcm_device *dev, bool powered) |
| 208 | { |
Lukas Wunner | 8bfa7e1e | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 209 | int err; |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 210 | |
Lukas Wunner | 8bfa7e1e | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 211 | if (powered && !IS_ERR(dev->clk) && !dev->clk_enabled) { |
| 212 | err = clk_prepare_enable(dev->clk); |
| 213 | if (err) |
| 214 | return err; |
| 215 | } |
| 216 | |
| 217 | err = dev->set_shutdown(dev, powered); |
| 218 | if (err) |
| 219 | goto err_clk_disable; |
| 220 | |
| 221 | err = dev->set_device_wakeup(dev, powered); |
| 222 | if (err) |
| 223 | goto err_revert_shutdown; |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 224 | |
| 225 | if (!powered && !IS_ERR(dev->clk) && dev->clk_enabled) |
John Keeping | 730ce39 | 2017-03-15 12:20:05 +0000 | [diff] [blame] | 226 | clk_disable_unprepare(dev->clk); |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 227 | |
| 228 | dev->clk_enabled = powered; |
| 229 | |
| 230 | return 0; |
Lukas Wunner | 8bfa7e1e | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 231 | |
| 232 | err_revert_shutdown: |
| 233 | dev->set_shutdown(dev, !powered); |
| 234 | err_clk_disable: |
| 235 | if (powered && !IS_ERR(dev->clk) && !dev->clk_enabled) |
| 236 | clk_disable_unprepare(dev->clk); |
| 237 | return err; |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 238 | } |
| 239 | |
Frederic Danis | b7a622a | 2015-09-23 18:18:09 +0200 | [diff] [blame] | 240 | #ifdef CONFIG_PM |
Frederic Danis | 6cc4396 | 2015-09-04 15:35:44 +0200 | [diff] [blame] | 241 | static irqreturn_t bcm_host_wake(int irq, void *data) |
| 242 | { |
| 243 | struct bcm_device *bdev = data; |
| 244 | |
| 245 | bt_dev_dbg(bdev, "Host wake IRQ"); |
| 246 | |
Hans de Goede | b09c615 | 2018-03-14 23:06:02 +0100 | [diff] [blame] | 247 | pm_runtime_get(bdev->dev); |
| 248 | pm_runtime_mark_last_busy(bdev->dev); |
| 249 | pm_runtime_put_autosuspend(bdev->dev); |
Frederic Danis | e88ab30 | 2015-09-23 18:18:11 +0200 | [diff] [blame] | 250 | |
Frederic Danis | 6cc4396 | 2015-09-04 15:35:44 +0200 | [diff] [blame] | 251 | return IRQ_HANDLED; |
| 252 | } |
| 253 | |
| 254 | static int bcm_request_irq(struct bcm_data *bcm) |
| 255 | { |
| 256 | struct bcm_device *bdev = bcm->dev; |
Loic Poulain | 98dc77d | 2017-07-04 12:57:56 +0200 | [diff] [blame] | 257 | int err; |
Frederic Danis | 6cc4396 | 2015-09-04 15:35:44 +0200 | [diff] [blame] | 258 | |
Frederic Danis | 6cc4396 | 2015-09-04 15:35:44 +0200 | [diff] [blame] | 259 | mutex_lock(&bcm_device_lock); |
| 260 | if (!bcm_device_exists(bdev)) { |
| 261 | err = -ENODEV; |
| 262 | goto unlock; |
| 263 | } |
| 264 | |
Loic Poulain | 98dc77d | 2017-07-04 12:57:56 +0200 | [diff] [blame] | 265 | if (bdev->irq <= 0) { |
| 266 | err = -EOPNOTSUPP; |
| 267 | goto unlock; |
Frederic Danis | 6cc4396 | 2015-09-04 15:35:44 +0200 | [diff] [blame] | 268 | } |
| 269 | |
Hans de Goede | c0d3ce5 | 2017-10-04 20:43:39 +0200 | [diff] [blame] | 270 | err = devm_request_irq(bdev->dev, bdev->irq, bcm_host_wake, |
Hans de Goede | 227630c | 2017-10-04 20:43:36 +0200 | [diff] [blame] | 271 | bdev->irq_active_low ? IRQF_TRIGGER_FALLING : |
| 272 | IRQF_TRIGGER_RISING, |
| 273 | "host_wake", bdev); |
Lukas Wunner | 4dc2733 | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 274 | if (err) { |
| 275 | bdev->irq = err; |
Loic Poulain | 98dc77d | 2017-07-04 12:57:56 +0200 | [diff] [blame] | 276 | goto unlock; |
Lukas Wunner | 4dc2733 | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 277 | } |
Loic Poulain | 98dc77d | 2017-07-04 12:57:56 +0200 | [diff] [blame] | 278 | |
Hans de Goede | c0d3ce5 | 2017-10-04 20:43:39 +0200 | [diff] [blame] | 279 | device_init_wakeup(bdev->dev, true); |
Loic Poulain | 98dc77d | 2017-07-04 12:57:56 +0200 | [diff] [blame] | 280 | |
Hans de Goede | c0d3ce5 | 2017-10-04 20:43:39 +0200 | [diff] [blame] | 281 | pm_runtime_set_autosuspend_delay(bdev->dev, |
Loic Poulain | 98dc77d | 2017-07-04 12:57:56 +0200 | [diff] [blame] | 282 | BCM_AUTOSUSPEND_DELAY); |
Hans de Goede | c0d3ce5 | 2017-10-04 20:43:39 +0200 | [diff] [blame] | 283 | pm_runtime_use_autosuspend(bdev->dev); |
| 284 | pm_runtime_set_active(bdev->dev); |
| 285 | pm_runtime_enable(bdev->dev); |
Loic Poulain | 98dc77d | 2017-07-04 12:57:56 +0200 | [diff] [blame] | 286 | |
Frederic Danis | 6cc4396 | 2015-09-04 15:35:44 +0200 | [diff] [blame] | 287 | unlock: |
| 288 | mutex_unlock(&bcm_device_lock); |
| 289 | |
| 290 | return err; |
| 291 | } |
| 292 | |
| 293 | static const struct bcm_set_sleep_mode default_sleep_params = { |
| 294 | .sleep_mode = 1, /* 0=Disabled, 1=UART, 2=Reserved, 3=USB */ |
| 295 | .idle_host = 2, /* idle threshold HOST, in 300ms */ |
| 296 | .idle_dev = 2, /* idle threshold device, in 300ms */ |
| 297 | .bt_wake_active = 1, /* BT_WAKE active mode: 1 = high, 0 = low */ |
| 298 | .host_wake_active = 0, /* HOST_WAKE active mode: 1 = high, 0 = low */ |
| 299 | .allow_host_sleep = 1, /* Allow host sleep in SCO flag */ |
Frederic Danis | e88ab30 | 2015-09-23 18:18:11 +0200 | [diff] [blame] | 300 | .combine_modes = 1, /* Combine sleep and LPM flag */ |
Frederic Danis | 6cc4396 | 2015-09-04 15:35:44 +0200 | [diff] [blame] | 301 | .tristate_control = 0, /* Allow tri-state control of UART tx flag */ |
| 302 | /* Irrelevant USB flags */ |
| 303 | .usb_auto_sleep = 0, |
| 304 | .usb_resume_timeout = 0, |
Lukas Wunner | ff87596 | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 305 | .break_to_host = 0, |
Hans de Goede | e07c99b | 2018-03-14 23:06:03 +0100 | [diff] [blame] | 306 | .pulsed_host_wake = 1, |
Frederic Danis | 6cc4396 | 2015-09-04 15:35:44 +0200 | [diff] [blame] | 307 | }; |
| 308 | |
| 309 | static int bcm_setup_sleep(struct hci_uart *hu) |
| 310 | { |
| 311 | struct bcm_data *bcm = hu->priv; |
| 312 | struct sk_buff *skb; |
| 313 | struct bcm_set_sleep_mode sleep_params = default_sleep_params; |
| 314 | |
Hans de Goede | 227630c | 2017-10-04 20:43:36 +0200 | [diff] [blame] | 315 | sleep_params.host_wake_active = !bcm->dev->irq_active_low; |
Frederic Danis | 6cc4396 | 2015-09-04 15:35:44 +0200 | [diff] [blame] | 316 | |
| 317 | skb = __hci_cmd_sync(hu->hdev, 0xfc27, sizeof(sleep_params), |
| 318 | &sleep_params, HCI_INIT_TIMEOUT); |
| 319 | if (IS_ERR(skb)) { |
| 320 | int err = PTR_ERR(skb); |
| 321 | bt_dev_err(hu->hdev, "Sleep VSC failed (%d)", err); |
| 322 | return err; |
| 323 | } |
| 324 | kfree_skb(skb); |
| 325 | |
| 326 | bt_dev_dbg(hu->hdev, "Set Sleep Parameters VSC succeeded"); |
| 327 | |
| 328 | return 0; |
| 329 | } |
| 330 | #else |
| 331 | static inline int bcm_request_irq(struct bcm_data *bcm) { return 0; } |
| 332 | static inline int bcm_setup_sleep(struct hci_uart *hu) { return 0; } |
| 333 | #endif |
| 334 | |
Marcel Holtmann | 075e1f5 | 2015-10-07 20:08:26 +0200 | [diff] [blame] | 335 | static int bcm_set_diag(struct hci_dev *hdev, bool enable) |
| 336 | { |
| 337 | struct hci_uart *hu = hci_get_drvdata(hdev); |
| 338 | struct bcm_data *bcm = hu->priv; |
| 339 | struct sk_buff *skb; |
| 340 | |
| 341 | if (!test_bit(HCI_RUNNING, &hdev->flags)) |
| 342 | return -ENETDOWN; |
| 343 | |
| 344 | skb = bt_skb_alloc(3, GFP_KERNEL); |
Dan Carpenter | a185739 | 2015-10-22 12:06:09 +0300 | [diff] [blame] | 345 | if (!skb) |
| 346 | return -ENOMEM; |
Marcel Holtmann | 075e1f5 | 2015-10-07 20:08:26 +0200 | [diff] [blame] | 347 | |
Johannes Berg | 634fef6 | 2017-06-16 14:29:24 +0200 | [diff] [blame] | 348 | skb_put_u8(skb, BCM_LM_DIAG_PKT); |
| 349 | skb_put_u8(skb, 0xf0); |
| 350 | skb_put_u8(skb, enable); |
Marcel Holtmann | 075e1f5 | 2015-10-07 20:08:26 +0200 | [diff] [blame] | 351 | |
| 352 | skb_queue_tail(&bcm->txq, skb); |
| 353 | hci_uart_tx_wakeup(hu); |
| 354 | |
| 355 | return 0; |
| 356 | } |
| 357 | |
Marcel Holtmann | bdd8818 | 2015-04-05 22:52:18 -0700 | [diff] [blame] | 358 | static int bcm_open(struct hci_uart *hu) |
| 359 | { |
| 360 | struct bcm_data *bcm; |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 361 | struct list_head *p; |
Lukas Wunner | 8bfa7e1e | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 362 | int err; |
Marcel Holtmann | bdd8818 | 2015-04-05 22:52:18 -0700 | [diff] [blame] | 363 | |
Frederic Danis | 65ad07c | 2015-09-01 12:13:36 +0200 | [diff] [blame] | 364 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
Marcel Holtmann | bdd8818 | 2015-04-05 22:52:18 -0700 | [diff] [blame] | 365 | |
| 366 | bcm = kzalloc(sizeof(*bcm), GFP_KERNEL); |
| 367 | if (!bcm) |
| 368 | return -ENOMEM; |
| 369 | |
| 370 | skb_queue_head_init(&bcm->txq); |
| 371 | |
| 372 | hu->priv = bcm; |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 373 | |
Hans de Goede | 8a92056 | 2017-10-04 20:43:43 +0200 | [diff] [blame] | 374 | mutex_lock(&bcm_device_lock); |
| 375 | |
Loic Poulain | 33cd149 | 2017-08-17 19:59:51 +0200 | [diff] [blame] | 376 | if (hu->serdev) { |
Lukas Wunner | 8bfa7e1e | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 377 | err = serdev_device_open(hu->serdev); |
| 378 | if (err) |
| 379 | goto err_free; |
| 380 | |
Hans de Goede | 8a92056 | 2017-10-04 20:43:43 +0200 | [diff] [blame] | 381 | bcm->dev = serdev_device_get_drvdata(hu->serdev); |
Loic Poulain | 33cd149 | 2017-08-17 19:59:51 +0200 | [diff] [blame] | 382 | goto out; |
| 383 | } |
| 384 | |
Johan Hovold | 95065a6 | 2017-03-29 18:15:27 +0200 | [diff] [blame] | 385 | if (!hu->tty->dev) |
| 386 | goto out; |
| 387 | |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 388 | list_for_each(p, &bcm_device_list) { |
| 389 | struct bcm_device *dev = list_entry(p, struct bcm_device, list); |
| 390 | |
| 391 | /* Retrieve saved bcm_device based on parent of the |
| 392 | * platform device (saved during device probe) and |
| 393 | * parent of tty device used by hci_uart |
| 394 | */ |
Hans de Goede | c0d3ce5 | 2017-10-04 20:43:39 +0200 | [diff] [blame] | 395 | if (hu->tty->dev->parent == dev->dev->parent) { |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 396 | bcm->dev = dev; |
Frederic Danis | b7a622a | 2015-09-23 18:18:09 +0200 | [diff] [blame] | 397 | #ifdef CONFIG_PM |
Frederic Danis | 118612f | 2015-08-11 16:35:38 +0200 | [diff] [blame] | 398 | dev->hu = hu; |
| 399 | #endif |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 400 | break; |
| 401 | } |
| 402 | } |
| 403 | |
Johan Hovold | 95065a6 | 2017-03-29 18:15:27 +0200 | [diff] [blame] | 404 | out: |
Hans de Goede | 8a92056 | 2017-10-04 20:43:43 +0200 | [diff] [blame] | 405 | if (bcm->dev) { |
| 406 | hu->init_speed = bcm->dev->init_speed; |
| 407 | hu->oper_speed = bcm->dev->oper_speed; |
Lukas Wunner | 8bfa7e1e | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 408 | err = bcm_gpio_set_power(bcm->dev, true); |
| 409 | if (err) |
| 410 | goto err_unset_hu; |
Hans de Goede | 8a92056 | 2017-10-04 20:43:43 +0200 | [diff] [blame] | 411 | } |
| 412 | |
| 413 | mutex_unlock(&bcm_device_lock); |
Marcel Holtmann | bdd8818 | 2015-04-05 22:52:18 -0700 | [diff] [blame] | 414 | return 0; |
Lukas Wunner | 8bfa7e1e | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 415 | |
| 416 | err_unset_hu: |
Hans de Goede | 8c6b8ed | 2018-01-22 12:53:24 +0100 | [diff] [blame] | 417 | if (hu->serdev) |
| 418 | serdev_device_close(hu->serdev); |
Lukas Wunner | 8bfa7e1e | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 419 | #ifdef CONFIG_PM |
Hans de Goede | 8c6b8ed | 2018-01-22 12:53:24 +0100 | [diff] [blame] | 420 | else |
| 421 | bcm->dev->hu = NULL; |
Lukas Wunner | 8bfa7e1e | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 422 | #endif |
| 423 | err_free: |
| 424 | mutex_unlock(&bcm_device_lock); |
| 425 | hu->priv = NULL; |
| 426 | kfree(bcm); |
| 427 | return err; |
Marcel Holtmann | bdd8818 | 2015-04-05 22:52:18 -0700 | [diff] [blame] | 428 | } |
| 429 | |
| 430 | static int bcm_close(struct hci_uart *hu) |
| 431 | { |
| 432 | struct bcm_data *bcm = hu->priv; |
Hans de Goede | 8a92056 | 2017-10-04 20:43:43 +0200 | [diff] [blame] | 433 | struct bcm_device *bdev = NULL; |
Lukas Wunner | 8bfa7e1e | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 434 | int err; |
Marcel Holtmann | bdd8818 | 2015-04-05 22:52:18 -0700 | [diff] [blame] | 435 | |
Frederic Danis | 65ad07c | 2015-09-01 12:13:36 +0200 | [diff] [blame] | 436 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
Marcel Holtmann | bdd8818 | 2015-04-05 22:52:18 -0700 | [diff] [blame] | 437 | |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 438 | /* Protect bcm->dev against removal of the device or driver */ |
Frederic Danis | bb3ea16 | 2015-09-01 12:13:35 +0200 | [diff] [blame] | 439 | mutex_lock(&bcm_device_lock); |
Hans de Goede | 8a92056 | 2017-10-04 20:43:43 +0200 | [diff] [blame] | 440 | |
| 441 | if (hu->serdev) { |
| 442 | serdev_device_close(hu->serdev); |
| 443 | bdev = serdev_device_get_drvdata(hu->serdev); |
| 444 | } else if (bcm_device_exists(bcm->dev)) { |
| 445 | bdev = bcm->dev; |
| 446 | #ifdef CONFIG_PM |
| 447 | bdev->hu = NULL; |
| 448 | #endif |
| 449 | } |
| 450 | |
| 451 | if (bdev) { |
Lukas Wunner | 6d83f1e | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 452 | if (IS_ENABLED(CONFIG_PM) && bdev->irq > 0) { |
Hans de Goede | c0d3ce5 | 2017-10-04 20:43:39 +0200 | [diff] [blame] | 453 | devm_free_irq(bdev->dev, bdev->irq, bdev); |
| 454 | device_init_wakeup(bdev->dev, false); |
Lukas Wunner | f4cf6b7 | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 455 | pm_runtime_disable(bdev->dev); |
Frederic Danis | 6cc4396 | 2015-09-04 15:35:44 +0200 | [diff] [blame] | 456 | } |
Lukas Wunner | 54ba69f | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 457 | |
Lukas Wunner | 8bfa7e1e | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 458 | err = bcm_gpio_set_power(bdev, false); |
| 459 | if (err) |
| 460 | bt_dev_err(hu->hdev, "Failed to power down"); |
| 461 | else |
| 462 | pm_runtime_set_suspended(bdev->dev); |
Frederic Danis | 118612f | 2015-08-11 16:35:38 +0200 | [diff] [blame] | 463 | } |
Frederic Danis | bb3ea16 | 2015-09-01 12:13:35 +0200 | [diff] [blame] | 464 | mutex_unlock(&bcm_device_lock); |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 465 | |
Marcel Holtmann | bdd8818 | 2015-04-05 22:52:18 -0700 | [diff] [blame] | 466 | skb_queue_purge(&bcm->txq); |
| 467 | kfree_skb(bcm->rx_skb); |
| 468 | kfree(bcm); |
| 469 | |
| 470 | hu->priv = NULL; |
| 471 | return 0; |
| 472 | } |
| 473 | |
| 474 | static int bcm_flush(struct hci_uart *hu) |
| 475 | { |
| 476 | struct bcm_data *bcm = hu->priv; |
| 477 | |
Frederic Danis | 65ad07c | 2015-09-01 12:13:36 +0200 | [diff] [blame] | 478 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
Marcel Holtmann | bdd8818 | 2015-04-05 22:52:18 -0700 | [diff] [blame] | 479 | |
| 480 | skb_queue_purge(&bcm->txq); |
| 481 | |
| 482 | return 0; |
| 483 | } |
| 484 | |
| 485 | static int bcm_setup(struct hci_uart *hu) |
| 486 | { |
Frederic Danis | 6cc4396 | 2015-09-04 15:35:44 +0200 | [diff] [blame] | 487 | struct bcm_data *bcm = hu->priv; |
Frederic Danis | 6be09b4 | 2015-05-28 11:25:05 +0200 | [diff] [blame] | 488 | char fw_name[64]; |
| 489 | const struct firmware *fw; |
Frederic Danis | 960ef1d | 2015-06-18 12:43:27 +0200 | [diff] [blame] | 490 | unsigned int speed; |
Frederic Danis | 6be09b4 | 2015-05-28 11:25:05 +0200 | [diff] [blame] | 491 | int err; |
| 492 | |
Frederic Danis | 65ad07c | 2015-09-01 12:13:36 +0200 | [diff] [blame] | 493 | bt_dev_dbg(hu->hdev, "hu %p", hu); |
Marcel Holtmann | bdd8818 | 2015-04-05 22:52:18 -0700 | [diff] [blame] | 494 | |
Marcel Holtmann | 075e1f5 | 2015-10-07 20:08:26 +0200 | [diff] [blame] | 495 | hu->hdev->set_diag = bcm_set_diag; |
Marcel Holtmann | bdd8818 | 2015-04-05 22:52:18 -0700 | [diff] [blame] | 496 | hu->hdev->set_bdaddr = btbcm_set_bdaddr; |
| 497 | |
Frederic Danis | 6be09b4 | 2015-05-28 11:25:05 +0200 | [diff] [blame] | 498 | err = btbcm_initialize(hu->hdev, fw_name, sizeof(fw_name)); |
| 499 | if (err) |
| 500 | return err; |
| 501 | |
| 502 | err = request_firmware(&fw, fw_name, &hu->hdev->dev); |
| 503 | if (err < 0) { |
Frederic Danis | 65ad07c | 2015-09-01 12:13:36 +0200 | [diff] [blame] | 504 | bt_dev_info(hu->hdev, "BCM: Patch %s not found", fw_name); |
Frederic Danis | 6be09b4 | 2015-05-28 11:25:05 +0200 | [diff] [blame] | 505 | return 0; |
| 506 | } |
| 507 | |
| 508 | err = btbcm_patchram(hu->hdev, fw); |
| 509 | if (err) { |
Frederic Danis | 65ad07c | 2015-09-01 12:13:36 +0200 | [diff] [blame] | 510 | bt_dev_info(hu->hdev, "BCM: Patch failed (%d)", err); |
Frederic Danis | 6be09b4 | 2015-05-28 11:25:05 +0200 | [diff] [blame] | 511 | goto finalize; |
| 512 | } |
| 513 | |
Frederic Danis | 960ef1d | 2015-06-18 12:43:27 +0200 | [diff] [blame] | 514 | /* Init speed if any */ |
| 515 | if (hu->init_speed) |
| 516 | speed = hu->init_speed; |
| 517 | else if (hu->proto->init_speed) |
| 518 | speed = hu->proto->init_speed; |
| 519 | else |
| 520 | speed = 0; |
Frederic Danis | 6be09b4 | 2015-05-28 11:25:05 +0200 | [diff] [blame] | 521 | |
Frederic Danis | 960ef1d | 2015-06-18 12:43:27 +0200 | [diff] [blame] | 522 | if (speed) |
Loic Poulain | 33cd149 | 2017-08-17 19:59:51 +0200 | [diff] [blame] | 523 | host_set_baudrate(hu, speed); |
Frederic Danis | 960ef1d | 2015-06-18 12:43:27 +0200 | [diff] [blame] | 524 | |
| 525 | /* Operational speed if any */ |
| 526 | if (hu->oper_speed) |
| 527 | speed = hu->oper_speed; |
| 528 | else if (hu->proto->oper_speed) |
| 529 | speed = hu->proto->oper_speed; |
| 530 | else |
| 531 | speed = 0; |
| 532 | |
| 533 | if (speed) { |
| 534 | err = bcm_set_baudrate(hu, speed); |
Frederic Danis | 61b2fc2 | 2015-06-09 16:15:37 +0200 | [diff] [blame] | 535 | if (!err) |
Loic Poulain | 33cd149 | 2017-08-17 19:59:51 +0200 | [diff] [blame] | 536 | host_set_baudrate(hu, speed); |
Frederic Danis | 61b2fc2 | 2015-06-09 16:15:37 +0200 | [diff] [blame] | 537 | } |
| 538 | |
Frederic Danis | 6be09b4 | 2015-05-28 11:25:05 +0200 | [diff] [blame] | 539 | finalize: |
| 540 | release_firmware(fw); |
| 541 | |
| 542 | err = btbcm_finalize(hu->hdev); |
Frederic Danis | 6cc4396 | 2015-09-04 15:35:44 +0200 | [diff] [blame] | 543 | if (err) |
| 544 | return err; |
| 545 | |
Loic Poulain | cdd24a2 | 2017-06-27 19:15:07 +0200 | [diff] [blame] | 546 | if (!bcm_request_irq(bcm)) |
Frederic Danis | 6cc4396 | 2015-09-04 15:35:44 +0200 | [diff] [blame] | 547 | err = bcm_setup_sleep(hu); |
Frederic Danis | 6be09b4 | 2015-05-28 11:25:05 +0200 | [diff] [blame] | 548 | |
| 549 | return err; |
Marcel Holtmann | bdd8818 | 2015-04-05 22:52:18 -0700 | [diff] [blame] | 550 | } |
| 551 | |
Marcel Holtmann | 94c5813 | 2015-10-07 19:12:54 +0200 | [diff] [blame] | 552 | #define BCM_RECV_LM_DIAG \ |
| 553 | .type = BCM_LM_DIAG_PKT, \ |
| 554 | .hlen = BCM_LM_DIAG_SIZE, \ |
| 555 | .loff = 0, \ |
| 556 | .lsize = 0, \ |
| 557 | .maxlen = BCM_LM_DIAG_SIZE |
| 558 | |
Marcel Holtmann | 01d5e44 | 2017-08-17 21:41:09 +0200 | [diff] [blame] | 559 | #define BCM_RECV_NULL \ |
| 560 | .type = BCM_NULL_PKT, \ |
| 561 | .hlen = BCM_NULL_SIZE, \ |
| 562 | .loff = 0, \ |
| 563 | .lsize = 0, \ |
| 564 | .maxlen = BCM_NULL_SIZE |
| 565 | |
Marcel Holtmann | 79b8df9 | 2015-04-05 23:44:59 -0700 | [diff] [blame] | 566 | static const struct h4_recv_pkt bcm_recv_pkts[] = { |
Marcel Holtmann | 94c5813 | 2015-10-07 19:12:54 +0200 | [diff] [blame] | 567 | { H4_RECV_ACL, .recv = hci_recv_frame }, |
| 568 | { H4_RECV_SCO, .recv = hci_recv_frame }, |
| 569 | { H4_RECV_EVENT, .recv = hci_recv_frame }, |
| 570 | { BCM_RECV_LM_DIAG, .recv = hci_recv_diag }, |
Marcel Holtmann | 01d5e44 | 2017-08-17 21:41:09 +0200 | [diff] [blame] | 571 | { BCM_RECV_NULL, .recv = hci_recv_diag }, |
Marcel Holtmann | 79b8df9 | 2015-04-05 23:44:59 -0700 | [diff] [blame] | 572 | }; |
| 573 | |
Marcel Holtmann | bdd8818 | 2015-04-05 22:52:18 -0700 | [diff] [blame] | 574 | static int bcm_recv(struct hci_uart *hu, const void *data, int count) |
| 575 | { |
| 576 | struct bcm_data *bcm = hu->priv; |
| 577 | |
| 578 | if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) |
| 579 | return -EUNATCH; |
| 580 | |
Marcel Holtmann | 79b8df9 | 2015-04-05 23:44:59 -0700 | [diff] [blame] | 581 | bcm->rx_skb = h4_recv_buf(hu->hdev, bcm->rx_skb, data, count, |
| 582 | bcm_recv_pkts, ARRAY_SIZE(bcm_recv_pkts)); |
Marcel Holtmann | bdd8818 | 2015-04-05 22:52:18 -0700 | [diff] [blame] | 583 | if (IS_ERR(bcm->rx_skb)) { |
| 584 | int err = PTR_ERR(bcm->rx_skb); |
Frederic Danis | 65ad07c | 2015-09-01 12:13:36 +0200 | [diff] [blame] | 585 | bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err); |
Chan-yeol Park | 3713416 | 2015-06-17 21:10:39 +0900 | [diff] [blame] | 586 | bcm->rx_skb = NULL; |
Marcel Holtmann | bdd8818 | 2015-04-05 22:52:18 -0700 | [diff] [blame] | 587 | return err; |
Frederic Danis | e88ab30 | 2015-09-23 18:18:11 +0200 | [diff] [blame] | 588 | } else if (!bcm->rx_skb) { |
| 589 | /* Delay auto-suspend when receiving completed packet */ |
| 590 | mutex_lock(&bcm_device_lock); |
Hans de Goede | b09c615 | 2018-03-14 23:06:02 +0100 | [diff] [blame] | 591 | if (bcm->dev && bcm_device_exists(bcm->dev)) { |
| 592 | pm_runtime_get(bcm->dev->dev); |
| 593 | pm_runtime_mark_last_busy(bcm->dev->dev); |
| 594 | pm_runtime_put_autosuspend(bcm->dev->dev); |
| 595 | } |
Frederic Danis | e88ab30 | 2015-09-23 18:18:11 +0200 | [diff] [blame] | 596 | mutex_unlock(&bcm_device_lock); |
Marcel Holtmann | bdd8818 | 2015-04-05 22:52:18 -0700 | [diff] [blame] | 597 | } |
| 598 | |
| 599 | return count; |
| 600 | } |
| 601 | |
| 602 | static int bcm_enqueue(struct hci_uart *hu, struct sk_buff *skb) |
| 603 | { |
| 604 | struct bcm_data *bcm = hu->priv; |
| 605 | |
Frederic Danis | 65ad07c | 2015-09-01 12:13:36 +0200 | [diff] [blame] | 606 | bt_dev_dbg(hu->hdev, "hu %p skb %p", hu, skb); |
Marcel Holtmann | bdd8818 | 2015-04-05 22:52:18 -0700 | [diff] [blame] | 607 | |
| 608 | /* Prepend skb with frame type */ |
Marcel Holtmann | 618e8bc | 2015-11-05 07:33:56 +0100 | [diff] [blame] | 609 | memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); |
Marcel Holtmann | bdd8818 | 2015-04-05 22:52:18 -0700 | [diff] [blame] | 610 | skb_queue_tail(&bcm->txq, skb); |
| 611 | |
| 612 | return 0; |
| 613 | } |
| 614 | |
| 615 | static struct sk_buff *bcm_dequeue(struct hci_uart *hu) |
| 616 | { |
| 617 | struct bcm_data *bcm = hu->priv; |
Frederic Danis | e88ab30 | 2015-09-23 18:18:11 +0200 | [diff] [blame] | 618 | struct sk_buff *skb = NULL; |
| 619 | struct bcm_device *bdev = NULL; |
Marcel Holtmann | bdd8818 | 2015-04-05 22:52:18 -0700 | [diff] [blame] | 620 | |
Frederic Danis | e88ab30 | 2015-09-23 18:18:11 +0200 | [diff] [blame] | 621 | mutex_lock(&bcm_device_lock); |
| 622 | |
| 623 | if (bcm_device_exists(bcm->dev)) { |
| 624 | bdev = bcm->dev; |
Hans de Goede | c0d3ce5 | 2017-10-04 20:43:39 +0200 | [diff] [blame] | 625 | pm_runtime_get_sync(bdev->dev); |
Frederic Danis | e88ab30 | 2015-09-23 18:18:11 +0200 | [diff] [blame] | 626 | /* Shall be resumed here */ |
| 627 | } |
| 628 | |
| 629 | skb = skb_dequeue(&bcm->txq); |
| 630 | |
| 631 | if (bdev) { |
Hans de Goede | c0d3ce5 | 2017-10-04 20:43:39 +0200 | [diff] [blame] | 632 | pm_runtime_mark_last_busy(bdev->dev); |
| 633 | pm_runtime_put_autosuspend(bdev->dev); |
Frederic Danis | e88ab30 | 2015-09-23 18:18:11 +0200 | [diff] [blame] | 634 | } |
| 635 | |
| 636 | mutex_unlock(&bcm_device_lock); |
| 637 | |
| 638 | return skb; |
Marcel Holtmann | bdd8818 | 2015-04-05 22:52:18 -0700 | [diff] [blame] | 639 | } |
| 640 | |
Frederic Danis | b7a622a | 2015-09-23 18:18:09 +0200 | [diff] [blame] | 641 | #ifdef CONFIG_PM |
| 642 | static int bcm_suspend_device(struct device *dev) |
Frederic Danis | 118612f | 2015-08-11 16:35:38 +0200 | [diff] [blame] | 643 | { |
Hans de Goede | 78277d7 | 2017-10-04 20:43:42 +0200 | [diff] [blame] | 644 | struct bcm_device *bdev = dev_get_drvdata(dev); |
Lukas Wunner | 8bfa7e1e | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 645 | int err; |
Frederic Danis | 118612f | 2015-08-11 16:35:38 +0200 | [diff] [blame] | 646 | |
Frederic Danis | b7a622a | 2015-09-23 18:18:09 +0200 | [diff] [blame] | 647 | bt_dev_dbg(bdev, ""); |
Frederic Danis | 118612f | 2015-08-11 16:35:38 +0200 | [diff] [blame] | 648 | |
Frederic Danis | b7a622a | 2015-09-23 18:18:09 +0200 | [diff] [blame] | 649 | if (!bdev->is_suspended && bdev->hu) { |
Frederic Danis | 118612f | 2015-08-11 16:35:38 +0200 | [diff] [blame] | 650 | hci_uart_set_flow_control(bdev->hu, true); |
| 651 | |
Frederic Danis | b7a622a | 2015-09-23 18:18:09 +0200 | [diff] [blame] | 652 | /* Once this returns, driver suspends BT via GPIO */ |
Frederic Danis | 118612f | 2015-08-11 16:35:38 +0200 | [diff] [blame] | 653 | bdev->is_suspended = true; |
| 654 | } |
| 655 | |
| 656 | /* Suspend the device */ |
Lukas Wunner | 8bfa7e1e | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 657 | err = bdev->set_device_wakeup(bdev, false); |
| 658 | if (err) { |
| 659 | if (bdev->is_suspended && bdev->hu) { |
| 660 | bdev->is_suspended = false; |
| 661 | hci_uart_set_flow_control(bdev->hu, false); |
| 662 | } |
| 663 | return -EBUSY; |
| 664 | } |
| 665 | |
Lukas Wunner | 3e81a4c | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 666 | bt_dev_dbg(bdev, "suspend, delaying 15 ms"); |
Lukas Wunner | e4b9e5b | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 667 | msleep(15); |
Frederic Danis | 118612f | 2015-08-11 16:35:38 +0200 | [diff] [blame] | 668 | |
Frederic Danis | b7a622a | 2015-09-23 18:18:09 +0200 | [diff] [blame] | 669 | return 0; |
| 670 | } |
| 671 | |
| 672 | static int bcm_resume_device(struct device *dev) |
| 673 | { |
Hans de Goede | 78277d7 | 2017-10-04 20:43:42 +0200 | [diff] [blame] | 674 | struct bcm_device *bdev = dev_get_drvdata(dev); |
Lukas Wunner | 8bfa7e1e | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 675 | int err; |
Frederic Danis | b7a622a | 2015-09-23 18:18:09 +0200 | [diff] [blame] | 676 | |
| 677 | bt_dev_dbg(bdev, ""); |
| 678 | |
Lukas Wunner | 8bfa7e1e | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 679 | err = bdev->set_device_wakeup(bdev, true); |
| 680 | if (err) { |
| 681 | dev_err(dev, "Failed to power up\n"); |
| 682 | return err; |
| 683 | } |
| 684 | |
Lukas Wunner | 3e81a4c | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 685 | bt_dev_dbg(bdev, "resume, delaying 15 ms"); |
Lukas Wunner | e4b9e5b | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 686 | msleep(15); |
Frederic Danis | b7a622a | 2015-09-23 18:18:09 +0200 | [diff] [blame] | 687 | |
| 688 | /* When this executes, the device has woken up already */ |
| 689 | if (bdev->is_suspended && bdev->hu) { |
| 690 | bdev->is_suspended = false; |
| 691 | |
| 692 | hci_uart_set_flow_control(bdev->hu, false); |
| 693 | } |
| 694 | |
| 695 | return 0; |
| 696 | } |
| 697 | #endif |
| 698 | |
| 699 | #ifdef CONFIG_PM_SLEEP |
Hans de Goede | 8a92056 | 2017-10-04 20:43:43 +0200 | [diff] [blame] | 700 | /* suspend callback */ |
Frederic Danis | b7a622a | 2015-09-23 18:18:09 +0200 | [diff] [blame] | 701 | static int bcm_suspend(struct device *dev) |
| 702 | { |
Hans de Goede | 78277d7 | 2017-10-04 20:43:42 +0200 | [diff] [blame] | 703 | struct bcm_device *bdev = dev_get_drvdata(dev); |
Frederic Danis | b7a622a | 2015-09-23 18:18:09 +0200 | [diff] [blame] | 704 | int error; |
| 705 | |
| 706 | bt_dev_dbg(bdev, "suspend: is_suspended %d", bdev->is_suspended); |
| 707 | |
Hans de Goede | 8a92056 | 2017-10-04 20:43:43 +0200 | [diff] [blame] | 708 | /* |
| 709 | * When used with a device instantiated as platform_device, bcm_suspend |
| 710 | * can be called at any time as long as the platform device is bound, |
| 711 | * so it should use bcm_device_lock to protect access to hci_uart |
Frederic Danis | b7a622a | 2015-09-23 18:18:09 +0200 | [diff] [blame] | 712 | * and device_wake-up GPIO. |
| 713 | */ |
| 714 | mutex_lock(&bcm_device_lock); |
| 715 | |
| 716 | if (!bdev->hu) |
| 717 | goto unlock; |
| 718 | |
Frederic Danis | e88ab30 | 2015-09-23 18:18:11 +0200 | [diff] [blame] | 719 | if (pm_runtime_active(dev)) |
| 720 | bcm_suspend_device(dev); |
Frederic Danis | b7a622a | 2015-09-23 18:18:09 +0200 | [diff] [blame] | 721 | |
Ronald Tschalär | 4a59f1f | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 722 | if (device_may_wakeup(dev) && bdev->irq > 0) { |
Frederic Danis | 6cc4396 | 2015-09-04 15:35:44 +0200 | [diff] [blame] | 723 | error = enable_irq_wake(bdev->irq); |
| 724 | if (!error) |
| 725 | bt_dev_dbg(bdev, "BCM irq: enabled"); |
| 726 | } |
| 727 | |
Frederic Danis | 917522a | 2015-08-28 15:44:00 +0200 | [diff] [blame] | 728 | unlock: |
Frederic Danis | bb3ea16 | 2015-09-01 12:13:35 +0200 | [diff] [blame] | 729 | mutex_unlock(&bcm_device_lock); |
Frederic Danis | 917522a | 2015-08-28 15:44:00 +0200 | [diff] [blame] | 730 | |
Frederic Danis | 118612f | 2015-08-11 16:35:38 +0200 | [diff] [blame] | 731 | return 0; |
| 732 | } |
| 733 | |
Hans de Goede | 8a92056 | 2017-10-04 20:43:43 +0200 | [diff] [blame] | 734 | /* resume callback */ |
Frederic Danis | 118612f | 2015-08-11 16:35:38 +0200 | [diff] [blame] | 735 | static int bcm_resume(struct device *dev) |
| 736 | { |
Hans de Goede | 78277d7 | 2017-10-04 20:43:42 +0200 | [diff] [blame] | 737 | struct bcm_device *bdev = dev_get_drvdata(dev); |
Lukas Wunner | 8bfa7e1e | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 738 | int err = 0; |
Frederic Danis | 118612f | 2015-08-11 16:35:38 +0200 | [diff] [blame] | 739 | |
Frederic Danis | 65ad07c | 2015-09-01 12:13:36 +0200 | [diff] [blame] | 740 | bt_dev_dbg(bdev, "resume: is_suspended %d", bdev->is_suspended); |
Frederic Danis | 118612f | 2015-08-11 16:35:38 +0200 | [diff] [blame] | 741 | |
Hans de Goede | 8a92056 | 2017-10-04 20:43:43 +0200 | [diff] [blame] | 742 | /* |
| 743 | * When used with a device instantiated as platform_device, bcm_resume |
| 744 | * can be called at any time as long as platform device is bound, |
| 745 | * so it should use bcm_device_lock to protect access to hci_uart |
Frederic Danis | b7a622a | 2015-09-23 18:18:09 +0200 | [diff] [blame] | 746 | * and device_wake-up GPIO. |
| 747 | */ |
Frederic Danis | bb3ea16 | 2015-09-01 12:13:35 +0200 | [diff] [blame] | 748 | mutex_lock(&bcm_device_lock); |
Frederic Danis | 917522a | 2015-08-28 15:44:00 +0200 | [diff] [blame] | 749 | |
| 750 | if (!bdev->hu) |
| 751 | goto unlock; |
| 752 | |
Ronald Tschalär | 4a59f1f | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 753 | if (device_may_wakeup(dev) && bdev->irq > 0) { |
Frederic Danis | 6cc4396 | 2015-09-04 15:35:44 +0200 | [diff] [blame] | 754 | disable_irq_wake(bdev->irq); |
| 755 | bt_dev_dbg(bdev, "BCM irq: disabled"); |
| 756 | } |
| 757 | |
Lukas Wunner | 8bfa7e1e | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 758 | err = bcm_resume_device(dev); |
Frederic Danis | 118612f | 2015-08-11 16:35:38 +0200 | [diff] [blame] | 759 | |
Frederic Danis | 917522a | 2015-08-28 15:44:00 +0200 | [diff] [blame] | 760 | unlock: |
Frederic Danis | bb3ea16 | 2015-09-01 12:13:35 +0200 | [diff] [blame] | 761 | mutex_unlock(&bcm_device_lock); |
Frederic Danis | 917522a | 2015-08-28 15:44:00 +0200 | [diff] [blame] | 762 | |
Lukas Wunner | 8bfa7e1e | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 763 | if (!err) { |
| 764 | pm_runtime_disable(dev); |
| 765 | pm_runtime_set_active(dev); |
| 766 | pm_runtime_enable(dev); |
| 767 | } |
Frederic Danis | e88ab30 | 2015-09-23 18:18:11 +0200 | [diff] [blame] | 768 | |
Frederic Danis | 118612f | 2015-08-11 16:35:38 +0200 | [diff] [blame] | 769 | return 0; |
| 770 | } |
| 771 | #endif |
| 772 | |
Daniel Drake | 89ab37b | 2017-01-05 11:10:54 -0600 | [diff] [blame] | 773 | static const struct acpi_gpio_params int_last_device_wakeup_gpios = { 0, 0, false }; |
| 774 | static const struct acpi_gpio_params int_last_shutdown_gpios = { 1, 0, false }; |
| 775 | static const struct acpi_gpio_params int_last_host_wakeup_gpios = { 2, 0, false }; |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 776 | |
Daniel Drake | 89ab37b | 2017-01-05 11:10:54 -0600 | [diff] [blame] | 777 | static const struct acpi_gpio_mapping acpi_bcm_int_last_gpios[] = { |
| 778 | { "device-wakeup-gpios", &int_last_device_wakeup_gpios, 1 }, |
| 779 | { "shutdown-gpios", &int_last_shutdown_gpios, 1 }, |
| 780 | { "host-wakeup-gpios", &int_last_host_wakeup_gpios, 1 }, |
| 781 | { }, |
| 782 | }; |
| 783 | |
| 784 | static const struct acpi_gpio_params int_first_host_wakeup_gpios = { 0, 0, false }; |
| 785 | static const struct acpi_gpio_params int_first_device_wakeup_gpios = { 1, 0, false }; |
| 786 | static const struct acpi_gpio_params int_first_shutdown_gpios = { 2, 0, false }; |
| 787 | |
| 788 | static const struct acpi_gpio_mapping acpi_bcm_int_first_gpios[] = { |
| 789 | { "device-wakeup-gpios", &int_first_device_wakeup_gpios, 1 }, |
| 790 | { "shutdown-gpios", &int_first_shutdown_gpios, 1 }, |
| 791 | { "host-wakeup-gpios", &int_first_host_wakeup_gpios, 1 }, |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 792 | { }, |
| 793 | }; |
| 794 | |
Frederic Danis | 50d78bc | 2015-08-12 12:46:01 +0200 | [diff] [blame] | 795 | #ifdef CONFIG_ACPI |
Frederic Danis | 5cebdfe | 2015-09-23 18:18:08 +0200 | [diff] [blame] | 796 | /* IRQ polarity of some chipsets are not defined correctly in ACPI table. */ |
Hans de Goede | 227630c | 2017-10-04 20:43:36 +0200 | [diff] [blame] | 797 | static const struct dmi_system_id bcm_active_low_irq_dmi_table[] = { |
Frederic Danis | 5cebdfe | 2015-09-23 18:18:08 +0200 | [diff] [blame] | 798 | { |
| 799 | .ident = "Asus T100TA", |
| 800 | .matches = { |
| 801 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, |
| 802 | "ASUSTeK COMPUTER INC."), |
| 803 | DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T100TA"), |
| 804 | }, |
Frederic Danis | 5cebdfe | 2015-09-23 18:18:08 +0200 | [diff] [blame] | 805 | }, |
Hans de Goede | c4c285d | 2017-06-29 14:21:32 +0200 | [diff] [blame] | 806 | { |
| 807 | .ident = "Asus T100CHI", |
| 808 | .matches = { |
| 809 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, |
| 810 | "ASUSTeK COMPUTER INC."), |
| 811 | DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "T100CHI"), |
| 812 | }, |
Hans de Goede | c4c285d | 2017-06-29 14:21:32 +0200 | [diff] [blame] | 813 | }, |
Jérôme de Bretagne | 5e2bd93 | 2016-10-09 15:51:05 +0200 | [diff] [blame] | 814 | { /* Handle ThinkPad 8 tablets with BCM2E55 chipset ACPI ID */ |
| 815 | .ident = "Lenovo ThinkPad 8", |
| 816 | .matches = { |
| 817 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"), |
| 818 | DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "ThinkPad 8"), |
| 819 | }, |
Jérôme de Bretagne | 5e2bd93 | 2016-10-09 15:51:05 +0200 | [diff] [blame] | 820 | }, |
Ian W MORRISON | 1bdb68b | 2017-10-07 17:15:25 +1100 | [diff] [blame] | 821 | { |
| 822 | .ident = "MINIX Z83-4", |
| 823 | .matches = { |
| 824 | DMI_EXACT_MATCH(DMI_SYS_VENDOR, "MINIX"), |
| 825 | DMI_MATCH(DMI_PRODUCT_NAME, "Z83-4"), |
| 826 | }, |
| 827 | }, |
Frederic Danis | 5cebdfe | 2015-09-23 18:18:08 +0200 | [diff] [blame] | 828 | { } |
| 829 | }; |
| 830 | |
Frederic Danis | ae05690 | 2015-08-11 16:35:37 +0200 | [diff] [blame] | 831 | static int bcm_resource(struct acpi_resource *ares, void *data) |
| 832 | { |
| 833 | struct bcm_device *dev = data; |
Frederic Danis | 6cc4396 | 2015-09-04 15:35:44 +0200 | [diff] [blame] | 834 | struct acpi_resource_extended_irq *irq; |
| 835 | struct acpi_resource_gpio *gpio; |
| 836 | struct acpi_resource_uart_serialbus *sb; |
Frederic Danis | ae05690 | 2015-08-11 16:35:37 +0200 | [diff] [blame] | 837 | |
Frederic Danis | 6cc4396 | 2015-09-04 15:35:44 +0200 | [diff] [blame] | 838 | switch (ares->type) { |
| 839 | case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: |
| 840 | irq = &ares->data.extended_irq; |
Hans de Goede | 227630c | 2017-10-04 20:43:36 +0200 | [diff] [blame] | 841 | dev->irq_active_low = irq->polarity == ACPI_ACTIVE_LOW; |
Frederic Danis | 6cc4396 | 2015-09-04 15:35:44 +0200 | [diff] [blame] | 842 | break; |
Frederic Danis | ae05690 | 2015-08-11 16:35:37 +0200 | [diff] [blame] | 843 | |
Frederic Danis | 6cc4396 | 2015-09-04 15:35:44 +0200 | [diff] [blame] | 844 | case ACPI_RESOURCE_TYPE_GPIO: |
| 845 | gpio = &ares->data.gpio; |
| 846 | if (gpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) |
Hans de Goede | 227630c | 2017-10-04 20:43:36 +0200 | [diff] [blame] | 847 | dev->irq_active_low = gpio->polarity == ACPI_ACTIVE_LOW; |
Frederic Danis | 6cc4396 | 2015-09-04 15:35:44 +0200 | [diff] [blame] | 848 | break; |
| 849 | |
| 850 | case ACPI_RESOURCE_TYPE_SERIAL_BUS: |
Frederic Danis | ae05690 | 2015-08-11 16:35:37 +0200 | [diff] [blame] | 851 | sb = &ares->data.uart_serial_bus; |
Marcel Holtmann | 74183a1 | 2017-08-16 09:53:30 +0200 | [diff] [blame] | 852 | if (sb->type == ACPI_RESOURCE_SERIAL_TYPE_UART) { |
Frederic Danis | ae05690 | 2015-08-11 16:35:37 +0200 | [diff] [blame] | 853 | dev->init_speed = sb->default_baud_rate; |
Marcel Holtmann | 74183a1 | 2017-08-16 09:53:30 +0200 | [diff] [blame] | 854 | dev->oper_speed = 4000000; |
| 855 | } |
Frederic Danis | 6cc4396 | 2015-09-04 15:35:44 +0200 | [diff] [blame] | 856 | break; |
| 857 | |
| 858 | default: |
| 859 | break; |
Frederic Danis | ae05690 | 2015-08-11 16:35:37 +0200 | [diff] [blame] | 860 | } |
| 861 | |
Hans de Goede | 9d54fd6 | 2017-10-04 20:43:41 +0200 | [diff] [blame] | 862 | return 0; |
Frederic Danis | ae05690 | 2015-08-11 16:35:37 +0200 | [diff] [blame] | 863 | } |
Lukas Wunner | 4c33162 | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 864 | |
| 865 | static int bcm_apple_set_device_wakeup(struct bcm_device *dev, bool awake) |
| 866 | { |
| 867 | if (ACPI_FAILURE(acpi_execute_simple_method(dev->btlp, NULL, !awake))) |
| 868 | return -EIO; |
| 869 | |
| 870 | return 0; |
| 871 | } |
| 872 | |
| 873 | static int bcm_apple_set_shutdown(struct bcm_device *dev, bool powered) |
| 874 | { |
| 875 | if (ACPI_FAILURE(acpi_evaluate_object(powered ? dev->btpu : dev->btpd, |
| 876 | NULL, NULL, NULL))) |
| 877 | return -EIO; |
| 878 | |
| 879 | return 0; |
| 880 | } |
| 881 | |
| 882 | static int bcm_apple_get_resources(struct bcm_device *dev) |
| 883 | { |
| 884 | struct acpi_device *adev = ACPI_COMPANION(dev->dev); |
| 885 | const union acpi_object *obj; |
| 886 | |
| 887 | if (!adev || |
| 888 | ACPI_FAILURE(acpi_get_handle(adev->handle, "BTLP", &dev->btlp)) || |
| 889 | ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPU", &dev->btpu)) || |
| 890 | ACPI_FAILURE(acpi_get_handle(adev->handle, "BTPD", &dev->btpd))) |
| 891 | return -ENODEV; |
| 892 | |
| 893 | if (!acpi_dev_get_property(adev, "baud", ACPI_TYPE_BUFFER, &obj) && |
| 894 | obj->buffer.length == 8) |
| 895 | dev->init_speed = *(u64 *)obj->buffer.pointer; |
| 896 | |
| 897 | dev->set_device_wakeup = bcm_apple_set_device_wakeup; |
| 898 | dev->set_shutdown = bcm_apple_set_shutdown; |
| 899 | |
| 900 | return 0; |
| 901 | } |
| 902 | #else |
| 903 | static inline int bcm_apple_get_resources(struct bcm_device *dev) |
| 904 | { |
| 905 | return -EOPNOTSUPP; |
| 906 | } |
Andy Shevchenko | 212d7183 | 2017-03-10 14:28:20 +0200 | [diff] [blame] | 907 | #endif /* CONFIG_ACPI */ |
Frederic Danis | ae05690 | 2015-08-11 16:35:37 +0200 | [diff] [blame] | 908 | |
Lukas Wunner | 8353b4a | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 909 | static int bcm_gpio_set_device_wakeup(struct bcm_device *dev, bool awake) |
| 910 | { |
| 911 | gpiod_set_value(dev->device_wakeup, awake); |
| 912 | return 0; |
| 913 | } |
| 914 | |
| 915 | static int bcm_gpio_set_shutdown(struct bcm_device *dev, bool powered) |
| 916 | { |
| 917 | gpiod_set_value(dev->shutdown, powered); |
| 918 | return 0; |
| 919 | } |
| 920 | |
Hans de Goede | 42ef18f | 2017-10-04 20:43:40 +0200 | [diff] [blame] | 921 | static int bcm_get_resources(struct bcm_device *dev) |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 922 | { |
Hans de Goede | c0d3ce5 | 2017-10-04 20:43:39 +0200 | [diff] [blame] | 923 | dev->name = dev_name(dev->dev); |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 924 | |
Lukas Wunner | 4c33162 | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 925 | if (x86_apple_machine && !bcm_apple_get_resources(dev)) |
| 926 | return 0; |
| 927 | |
Hans de Goede | c0d3ce5 | 2017-10-04 20:43:39 +0200 | [diff] [blame] | 928 | dev->clk = devm_clk_get(dev->dev, NULL); |
Daniel Drake | 89ab37b | 2017-01-05 11:10:54 -0600 | [diff] [blame] | 929 | |
Stefan Wahren | ab2f336 | 2018-02-25 15:10:52 +0100 | [diff] [blame] | 930 | dev->device_wakeup = devm_gpiod_get_optional(dev->dev, "device-wakeup", |
| 931 | GPIOD_OUT_LOW); |
Uwe Kleine-König | 62aaefa | 2015-08-12 09:20:56 +0200 | [diff] [blame] | 932 | if (IS_ERR(dev->device_wakeup)) |
| 933 | return PTR_ERR(dev->device_wakeup); |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 934 | |
Stefan Wahren | ab2f336 | 2018-02-25 15:10:52 +0100 | [diff] [blame] | 935 | dev->shutdown = devm_gpiod_get_optional(dev->dev, "shutdown", |
| 936 | GPIOD_OUT_LOW); |
Uwe Kleine-König | 62aaefa | 2015-08-12 09:20:56 +0200 | [diff] [blame] | 937 | if (IS_ERR(dev->shutdown)) |
| 938 | return PTR_ERR(dev->shutdown); |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 939 | |
Lukas Wunner | 8353b4a | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 940 | dev->set_device_wakeup = bcm_gpio_set_device_wakeup; |
| 941 | dev->set_shutdown = bcm_gpio_set_shutdown; |
| 942 | |
Frederic Danis | 6cc4396 | 2015-09-04 15:35:44 +0200 | [diff] [blame] | 943 | /* IRQ can be declared in ACPI table as Interrupt or GpioInt */ |
Frederic Danis | 6cc4396 | 2015-09-04 15:35:44 +0200 | [diff] [blame] | 944 | if (dev->irq <= 0) { |
| 945 | struct gpio_desc *gpio; |
| 946 | |
Hans de Goede | c0d3ce5 | 2017-10-04 20:43:39 +0200 | [diff] [blame] | 947 | gpio = devm_gpiod_get_optional(dev->dev, "host-wakeup", |
Frederic Danis | 6cc4396 | 2015-09-04 15:35:44 +0200 | [diff] [blame] | 948 | GPIOD_IN); |
| 949 | if (IS_ERR(gpio)) |
| 950 | return PTR_ERR(gpio); |
| 951 | |
| 952 | dev->irq = gpiod_to_irq(gpio); |
| 953 | } |
| 954 | |
Lukas Wunner | 5954cdf | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 955 | dev_dbg(dev->dev, "BCM irq: %d\n", dev->irq); |
Andy Shevchenko | 212d7183 | 2017-03-10 14:28:20 +0200 | [diff] [blame] | 956 | return 0; |
| 957 | } |
| 958 | |
| 959 | #ifdef CONFIG_ACPI |
| 960 | static int bcm_acpi_probe(struct bcm_device *dev) |
| 961 | { |
Andy Shevchenko | 212d7183 | 2017-03-10 14:28:20 +0200 | [diff] [blame] | 962 | LIST_HEAD(resources); |
| 963 | const struct dmi_system_id *dmi_id; |
| 964 | const struct acpi_gpio_mapping *gpio_mapping = acpi_bcm_int_last_gpios; |
| 965 | const struct acpi_device_id *id; |
Hans de Goede | 9d54fd6 | 2017-10-04 20:43:41 +0200 | [diff] [blame] | 966 | struct resource_entry *entry; |
Andy Shevchenko | 212d7183 | 2017-03-10 14:28:20 +0200 | [diff] [blame] | 967 | int ret; |
| 968 | |
| 969 | /* Retrieve GPIO data */ |
Hans de Goede | c0d3ce5 | 2017-10-04 20:43:39 +0200 | [diff] [blame] | 970 | id = acpi_match_device(dev->dev->driver->acpi_match_table, dev->dev); |
Andy Shevchenko | 212d7183 | 2017-03-10 14:28:20 +0200 | [diff] [blame] | 971 | if (id) |
| 972 | gpio_mapping = (const struct acpi_gpio_mapping *) id->driver_data; |
| 973 | |
Hans de Goede | c0d3ce5 | 2017-10-04 20:43:39 +0200 | [diff] [blame] | 974 | ret = devm_acpi_dev_add_driver_gpios(dev->dev, gpio_mapping); |
Andy Shevchenko | 212d7183 | 2017-03-10 14:28:20 +0200 | [diff] [blame] | 975 | if (ret) |
| 976 | return ret; |
| 977 | |
Frederic Danis | ae05690 | 2015-08-11 16:35:37 +0200 | [diff] [blame] | 978 | /* Retrieve UART ACPI info */ |
Hans de Goede | c0d3ce5 | 2017-10-04 20:43:39 +0200 | [diff] [blame] | 979 | ret = acpi_dev_get_resources(ACPI_COMPANION(dev->dev), |
Jarkko Nikula | e98d6d6 | 2015-09-30 16:26:45 +0300 | [diff] [blame] | 980 | &resources, bcm_resource, dev); |
Jarkko Nikula | 5be0028 | 2015-09-30 16:26:42 +0300 | [diff] [blame] | 981 | if (ret < 0) |
| 982 | return ret; |
Hans de Goede | 9d54fd6 | 2017-10-04 20:43:41 +0200 | [diff] [blame] | 983 | |
| 984 | resource_list_for_each_entry(entry, &resources) { |
| 985 | if (resource_type(entry->res) == IORESOURCE_IRQ) { |
| 986 | dev->irq = entry->res->start; |
| 987 | break; |
| 988 | } |
| 989 | } |
Jarkko Nikula | 09dbf1b | 2015-09-30 16:26:41 +0300 | [diff] [blame] | 990 | acpi_dev_free_resource_list(&resources); |
Frederic Danis | ae05690 | 2015-08-11 16:35:37 +0200 | [diff] [blame] | 991 | |
Hans de Goede | 227630c | 2017-10-04 20:43:36 +0200 | [diff] [blame] | 992 | dmi_id = dmi_first_match(bcm_active_low_irq_dmi_table); |
Frederic Danis | 5cebdfe | 2015-09-23 18:18:08 +0200 | [diff] [blame] | 993 | if (dmi_id) { |
Ian W MORRISON | e8bfe86 | 2017-10-07 17:16:08 +1100 | [diff] [blame] | 994 | dev_warn(dev->dev, "%s: Overwriting IRQ polarity to active low", |
Frederic Danis | 5cebdfe | 2015-09-23 18:18:08 +0200 | [diff] [blame] | 995 | dmi_id->ident); |
Hans de Goede | 227630c | 2017-10-04 20:43:36 +0200 | [diff] [blame] | 996 | dev->irq_active_low = true; |
Frederic Danis | 5cebdfe | 2015-09-23 18:18:08 +0200 | [diff] [blame] | 997 | } |
| 998 | |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 999 | return 0; |
| 1000 | } |
Frederic Danis | 50d78bc | 2015-08-12 12:46:01 +0200 | [diff] [blame] | 1001 | #else |
| 1002 | static int bcm_acpi_probe(struct bcm_device *dev) |
| 1003 | { |
| 1004 | return -EINVAL; |
| 1005 | } |
| 1006 | #endif /* CONFIG_ACPI */ |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 1007 | |
Hans de Goede | 8a92056 | 2017-10-04 20:43:43 +0200 | [diff] [blame] | 1008 | static int bcm_of_probe(struct bcm_device *bdev) |
| 1009 | { |
| 1010 | device_property_read_u32(bdev->dev, "max-speed", &bdev->oper_speed); |
| 1011 | return 0; |
| 1012 | } |
| 1013 | |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 1014 | static int bcm_probe(struct platform_device *pdev) |
| 1015 | { |
| 1016 | struct bcm_device *dev; |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 1017 | int ret; |
| 1018 | |
| 1019 | dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); |
| 1020 | if (!dev) |
| 1021 | return -ENOMEM; |
| 1022 | |
Hans de Goede | c0d3ce5 | 2017-10-04 20:43:39 +0200 | [diff] [blame] | 1023 | dev->dev = &pdev->dev; |
Hans de Goede | 4a56f89 | 2017-10-04 20:43:38 +0200 | [diff] [blame] | 1024 | dev->irq = platform_get_irq(pdev, 0); |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 1025 | |
Hans de Goede | 201762e | 2017-10-04 20:43:37 +0200 | [diff] [blame] | 1026 | if (has_acpi_companion(&pdev->dev)) { |
Andy Shevchenko | 212d7183 | 2017-03-10 14:28:20 +0200 | [diff] [blame] | 1027 | ret = bcm_acpi_probe(dev); |
Hans de Goede | 201762e | 2017-10-04 20:43:37 +0200 | [diff] [blame] | 1028 | if (ret) |
| 1029 | return ret; |
| 1030 | } |
| 1031 | |
Hans de Goede | 42ef18f | 2017-10-04 20:43:40 +0200 | [diff] [blame] | 1032 | ret = bcm_get_resources(dev); |
Jarkko Nikula | 4d1c455 | 2015-09-30 16:26:44 +0300 | [diff] [blame] | 1033 | if (ret) |
| 1034 | return ret; |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 1035 | |
| 1036 | platform_set_drvdata(pdev, dev); |
| 1037 | |
| 1038 | dev_info(&pdev->dev, "%s device registered.\n", dev->name); |
| 1039 | |
| 1040 | /* Place this instance on the device list */ |
Frederic Danis | bb3ea16 | 2015-09-01 12:13:35 +0200 | [diff] [blame] | 1041 | mutex_lock(&bcm_device_lock); |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 1042 | list_add_tail(&dev->list, &bcm_device_list); |
Frederic Danis | bb3ea16 | 2015-09-01 12:13:35 +0200 | [diff] [blame] | 1043 | mutex_unlock(&bcm_device_lock); |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 1044 | |
Lukas Wunner | 8bfa7e1e | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 1045 | ret = bcm_gpio_set_power(dev, false); |
| 1046 | if (ret) |
| 1047 | dev_err(&pdev->dev, "Failed to power down\n"); |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 1048 | |
| 1049 | return 0; |
| 1050 | } |
| 1051 | |
| 1052 | static int bcm_remove(struct platform_device *pdev) |
| 1053 | { |
| 1054 | struct bcm_device *dev = platform_get_drvdata(pdev); |
| 1055 | |
Frederic Danis | bb3ea16 | 2015-09-01 12:13:35 +0200 | [diff] [blame] | 1056 | mutex_lock(&bcm_device_lock); |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 1057 | list_del(&dev->list); |
Frederic Danis | bb3ea16 | 2015-09-01 12:13:35 +0200 | [diff] [blame] | 1058 | mutex_unlock(&bcm_device_lock); |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 1059 | |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 1060 | dev_info(&pdev->dev, "%s device unregistered.\n", dev->name); |
| 1061 | |
| 1062 | return 0; |
| 1063 | } |
| 1064 | |
Marcel Holtmann | bdd8818 | 2015-04-05 22:52:18 -0700 | [diff] [blame] | 1065 | static const struct hci_uart_proto bcm_proto = { |
| 1066 | .id = HCI_UART_BCM, |
Loic Poulain | 143f0a2 | 2016-09-19 12:05:12 +0200 | [diff] [blame] | 1067 | .name = "Broadcom", |
Marcel Holtmann | aee61f7 | 2015-10-20 21:30:45 +0200 | [diff] [blame] | 1068 | .manufacturer = 15, |
Frederic Danis | 61b2fc2 | 2015-06-09 16:15:37 +0200 | [diff] [blame] | 1069 | .init_speed = 115200, |
Marcel Holtmann | bdd8818 | 2015-04-05 22:52:18 -0700 | [diff] [blame] | 1070 | .open = bcm_open, |
| 1071 | .close = bcm_close, |
| 1072 | .flush = bcm_flush, |
| 1073 | .setup = bcm_setup, |
Frederic Danis | 61b2fc2 | 2015-06-09 16:15:37 +0200 | [diff] [blame] | 1074 | .set_baudrate = bcm_set_baudrate, |
Marcel Holtmann | bdd8818 | 2015-04-05 22:52:18 -0700 | [diff] [blame] | 1075 | .recv = bcm_recv, |
| 1076 | .enqueue = bcm_enqueue, |
| 1077 | .dequeue = bcm_dequeue, |
| 1078 | }; |
| 1079 | |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 1080 | #ifdef CONFIG_ACPI |
| 1081 | static const struct acpi_device_id bcm_acpi_match[] = { |
Daniel Drake | 89ab37b | 2017-01-05 11:10:54 -0600 | [diff] [blame] | 1082 | { "BCM2E1A", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, |
| 1083 | { "BCM2E39", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, |
| 1084 | { "BCM2E3A", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, |
| 1085 | { "BCM2E3D", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, |
| 1086 | { "BCM2E3F", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, |
| 1087 | { "BCM2E40", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, |
| 1088 | { "BCM2E54", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, |
| 1089 | { "BCM2E55", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, |
| 1090 | { "BCM2E64", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, |
| 1091 | { "BCM2E65", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, |
| 1092 | { "BCM2E67", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, |
| 1093 | { "BCM2E71", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, |
Hans de Goede | c23fae1 | 2017-11-22 14:37:28 +0100 | [diff] [blame] | 1094 | { "BCM2E72", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, |
Daniel Drake | 89ab37b | 2017-01-05 11:10:54 -0600 | [diff] [blame] | 1095 | { "BCM2E7B", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, |
| 1096 | { "BCM2E7C", (kernel_ulong_t)&acpi_bcm_int_last_gpios }, |
Hans de Goede | 61d220a | 2017-10-13 17:54:02 +0200 | [diff] [blame] | 1097 | { "BCM2E7E", (kernel_ulong_t)&acpi_bcm_int_first_gpios }, |
Daniel Drake | 89ab37b | 2017-01-05 11:10:54 -0600 | [diff] [blame] | 1098 | { "BCM2E95", (kernel_ulong_t)&acpi_bcm_int_first_gpios }, |
| 1099 | { "BCM2E96", (kernel_ulong_t)&acpi_bcm_int_first_gpios }, |
Ian W MORRISON | 1bdb68b | 2017-10-07 17:15:25 +1100 | [diff] [blame] | 1100 | { "BCM2EA4", (kernel_ulong_t)&acpi_bcm_int_first_gpios }, |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 1101 | { }, |
| 1102 | }; |
| 1103 | MODULE_DEVICE_TABLE(acpi, bcm_acpi_match); |
| 1104 | #endif |
| 1105 | |
Hans de Goede | 8a92056 | 2017-10-04 20:43:43 +0200 | [diff] [blame] | 1106 | /* suspend and resume callbacks */ |
Frederic Danis | e88ab30 | 2015-09-23 18:18:11 +0200 | [diff] [blame] | 1107 | static const struct dev_pm_ops bcm_pm_ops = { |
| 1108 | SET_SYSTEM_SLEEP_PM_OPS(bcm_suspend, bcm_resume) |
| 1109 | SET_RUNTIME_PM_OPS(bcm_suspend_device, bcm_resume_device, NULL) |
| 1110 | }; |
Frederic Danis | 118612f | 2015-08-11 16:35:38 +0200 | [diff] [blame] | 1111 | |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 1112 | static struct platform_driver bcm_driver = { |
| 1113 | .probe = bcm_probe, |
| 1114 | .remove = bcm_remove, |
| 1115 | .driver = { |
| 1116 | .name = "hci_bcm", |
| 1117 | .acpi_match_table = ACPI_PTR(bcm_acpi_match), |
Frederic Danis | 118612f | 2015-08-11 16:35:38 +0200 | [diff] [blame] | 1118 | .pm = &bcm_pm_ops, |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 1119 | }, |
| 1120 | }; |
| 1121 | |
Loic Poulain | 33cd149 | 2017-08-17 19:59:51 +0200 | [diff] [blame] | 1122 | static int bcm_serdev_probe(struct serdev_device *serdev) |
| 1123 | { |
Hans de Goede | 8a92056 | 2017-10-04 20:43:43 +0200 | [diff] [blame] | 1124 | struct bcm_device *bcmdev; |
Loic Poulain | 33cd149 | 2017-08-17 19:59:51 +0200 | [diff] [blame] | 1125 | int err; |
| 1126 | |
| 1127 | bcmdev = devm_kzalloc(&serdev->dev, sizeof(*bcmdev), GFP_KERNEL); |
| 1128 | if (!bcmdev) |
| 1129 | return -ENOMEM; |
| 1130 | |
Hans de Goede | 8a92056 | 2017-10-04 20:43:43 +0200 | [diff] [blame] | 1131 | bcmdev->dev = &serdev->dev; |
Arnd Bergmann | 81a1905 | 2017-10-11 15:46:21 +0200 | [diff] [blame] | 1132 | #ifdef CONFIG_PM |
Hans de Goede | 8a92056 | 2017-10-04 20:43:43 +0200 | [diff] [blame] | 1133 | bcmdev->hu = &bcmdev->serdev_hu; |
Arnd Bergmann | 81a1905 | 2017-10-11 15:46:21 +0200 | [diff] [blame] | 1134 | #endif |
Hans de Goede | 8a92056 | 2017-10-04 20:43:43 +0200 | [diff] [blame] | 1135 | bcmdev->serdev_hu.serdev = serdev; |
Loic Poulain | 33cd149 | 2017-08-17 19:59:51 +0200 | [diff] [blame] | 1136 | serdev_device_set_drvdata(serdev, bcmdev); |
| 1137 | |
Hans de Goede | 8a92056 | 2017-10-04 20:43:43 +0200 | [diff] [blame] | 1138 | if (has_acpi_companion(&serdev->dev)) |
| 1139 | err = bcm_acpi_probe(bcmdev); |
| 1140 | else |
| 1141 | err = bcm_of_probe(bcmdev); |
| 1142 | if (err) |
| 1143 | return err; |
Loic Poulain | 33cd149 | 2017-08-17 19:59:51 +0200 | [diff] [blame] | 1144 | |
Hans de Goede | 8a92056 | 2017-10-04 20:43:43 +0200 | [diff] [blame] | 1145 | err = bcm_get_resources(bcmdev); |
| 1146 | if (err) |
| 1147 | return err; |
| 1148 | |
Lukas Wunner | 8bfa7e1e | 2018-01-10 16:32:10 +0100 | [diff] [blame] | 1149 | err = bcm_gpio_set_power(bcmdev, false); |
| 1150 | if (err) |
| 1151 | dev_err(&serdev->dev, "Failed to power down\n"); |
Hans de Goede | 8a92056 | 2017-10-04 20:43:43 +0200 | [diff] [blame] | 1152 | |
| 1153 | return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto); |
Loic Poulain | 33cd149 | 2017-08-17 19:59:51 +0200 | [diff] [blame] | 1154 | } |
| 1155 | |
| 1156 | static void bcm_serdev_remove(struct serdev_device *serdev) |
| 1157 | { |
Hans de Goede | 8a92056 | 2017-10-04 20:43:43 +0200 | [diff] [blame] | 1158 | struct bcm_device *bcmdev = serdev_device_get_drvdata(serdev); |
Loic Poulain | 33cd149 | 2017-08-17 19:59:51 +0200 | [diff] [blame] | 1159 | |
Hans de Goede | 8a92056 | 2017-10-04 20:43:43 +0200 | [diff] [blame] | 1160 | hci_uart_unregister_device(&bcmdev->serdev_hu); |
Loic Poulain | 33cd149 | 2017-08-17 19:59:51 +0200 | [diff] [blame] | 1161 | } |
| 1162 | |
| 1163 | #ifdef CONFIG_OF |
| 1164 | static const struct of_device_id bcm_bluetooth_of_match[] = { |
| 1165 | { .compatible = "brcm,bcm43438-bt" }, |
| 1166 | { }, |
| 1167 | }; |
| 1168 | MODULE_DEVICE_TABLE(of, bcm_bluetooth_of_match); |
| 1169 | #endif |
| 1170 | |
| 1171 | static struct serdev_device_driver bcm_serdev_driver = { |
| 1172 | .probe = bcm_serdev_probe, |
| 1173 | .remove = bcm_serdev_remove, |
| 1174 | .driver = { |
| 1175 | .name = "hci_uart_bcm", |
| 1176 | .of_match_table = of_match_ptr(bcm_bluetooth_of_match), |
Hans de Goede | 8a92056 | 2017-10-04 20:43:43 +0200 | [diff] [blame] | 1177 | .acpi_match_table = ACPI_PTR(bcm_acpi_match), |
| 1178 | .pm = &bcm_pm_ops, |
Loic Poulain | 33cd149 | 2017-08-17 19:59:51 +0200 | [diff] [blame] | 1179 | }, |
| 1180 | }; |
| 1181 | |
Marcel Holtmann | bdd8818 | 2015-04-05 22:52:18 -0700 | [diff] [blame] | 1182 | int __init bcm_init(void) |
| 1183 | { |
Loic Poulain | 33cd149 | 2017-08-17 19:59:51 +0200 | [diff] [blame] | 1184 | /* For now, we need to keep both platform device |
| 1185 | * driver (ACPI generated) and serdev driver (DT). |
| 1186 | */ |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 1187 | platform_driver_register(&bcm_driver); |
Loic Poulain | 33cd149 | 2017-08-17 19:59:51 +0200 | [diff] [blame] | 1188 | serdev_device_driver_register(&bcm_serdev_driver); |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 1189 | |
Marcel Holtmann | bdd8818 | 2015-04-05 22:52:18 -0700 | [diff] [blame] | 1190 | return hci_uart_register_proto(&bcm_proto); |
| 1191 | } |
| 1192 | |
| 1193 | int __exit bcm_deinit(void) |
| 1194 | { |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 1195 | platform_driver_unregister(&bcm_driver); |
Loic Poulain | 33cd149 | 2017-08-17 19:59:51 +0200 | [diff] [blame] | 1196 | serdev_device_driver_unregister(&bcm_serdev_driver); |
Frederic Danis | 0395ffc | 2015-08-11 16:35:35 +0200 | [diff] [blame] | 1197 | |
Marcel Holtmann | bdd8818 | 2015-04-05 22:52:18 -0700 | [diff] [blame] | 1198 | return hci_uart_unregister_proto(&bcm_proto); |
| 1199 | } |