Marcel Holtmann | 16e3887 | 2015-04-04 16:13:02 -0700 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * Bluetooth HCI UART driver for Intel 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> |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 27 | #include <linux/firmware.h> |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 28 | #include <linux/module.h> |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 29 | #include <linux/wait.h> |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 30 | #include <linux/tty.h> |
| 31 | #include <linux/platform_device.h> |
| 32 | #include <linux/gpio/consumer.h> |
| 33 | #include <linux/acpi.h> |
Loic Poulain | 765ea3a | 2015-08-29 13:38:18 +0200 | [diff] [blame] | 34 | #include <linux/interrupt.h> |
Loic Poulain | 74cdad3 | 2015-09-02 12:04:13 +0200 | [diff] [blame] | 35 | #include <linux/pm_runtime.h> |
Marcel Holtmann | 16e3887 | 2015-04-04 16:13:02 -0700 | [diff] [blame] | 36 | |
| 37 | #include <net/bluetooth/bluetooth.h> |
| 38 | #include <net/bluetooth/hci_core.h> |
| 39 | |
| 40 | #include "hci_uart.h" |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 41 | #include "btintel.h" |
| 42 | |
| 43 | #define STATE_BOOTLOADER 0 |
| 44 | #define STATE_DOWNLOADING 1 |
| 45 | #define STATE_FIRMWARE_LOADED 2 |
| 46 | #define STATE_FIRMWARE_FAILED 3 |
| 47 | #define STATE_BOOTING 4 |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 48 | #define STATE_LPM_ENABLED 5 |
| 49 | #define STATE_TX_ACTIVE 6 |
Loic Poulain | 8943654 | 2015-09-02 12:04:11 +0200 | [diff] [blame] | 50 | #define STATE_SUSPENDED 7 |
| 51 | #define STATE_LPM_TRANSACTION 8 |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 52 | |
Loic Poulain | 8943654 | 2015-09-02 12:04:11 +0200 | [diff] [blame] | 53 | #define HCI_LPM_WAKE_PKT 0xf0 |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 54 | #define HCI_LPM_PKT 0xf1 |
| 55 | #define HCI_LPM_MAX_SIZE 10 |
| 56 | #define HCI_LPM_HDR_SIZE HCI_EVENT_HDR_SIZE |
| 57 | |
| 58 | #define LPM_OP_TX_NOTIFY 0x00 |
Loic Poulain | 8943654 | 2015-09-02 12:04:11 +0200 | [diff] [blame] | 59 | #define LPM_OP_SUSPEND_ACK 0x02 |
| 60 | #define LPM_OP_RESUME_ACK 0x03 |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 61 | |
Loic Poulain | 74cdad3 | 2015-09-02 12:04:13 +0200 | [diff] [blame] | 62 | #define LPM_SUSPEND_DELAY_MS 1000 |
| 63 | |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 64 | struct hci_lpm_pkt { |
| 65 | __u8 opcode; |
| 66 | __u8 dlen; |
| 67 | __u8 data[0]; |
| 68 | } __packed; |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 69 | |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 70 | struct intel_device { |
| 71 | struct list_head list; |
| 72 | struct platform_device *pdev; |
| 73 | struct gpio_desc *reset; |
Loic Poulain | aa6802d | 2015-09-02 12:04:12 +0200 | [diff] [blame] | 74 | struct hci_uart *hu; |
| 75 | struct mutex hu_lock; |
Loic Poulain | 765ea3a | 2015-08-29 13:38:18 +0200 | [diff] [blame] | 76 | int irq; |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 77 | }; |
| 78 | |
| 79 | static LIST_HEAD(intel_device_list); |
Loic Poulain | 67c8bde | 2015-08-31 18:34:31 +0200 | [diff] [blame] | 80 | static DEFINE_MUTEX(intel_device_list_lock); |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 81 | |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 82 | struct intel_data { |
| 83 | struct sk_buff *rx_skb; |
| 84 | struct sk_buff_head txq; |
Loic Poulain | 74cdad3 | 2015-09-02 12:04:13 +0200 | [diff] [blame] | 85 | struct work_struct busy_work; |
| 86 | struct hci_uart *hu; |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 87 | unsigned long flags; |
| 88 | }; |
| 89 | |
Loic Poulain | ff28955 | 2015-08-25 17:55:44 +0200 | [diff] [blame] | 90 | static u8 intel_convert_speed(unsigned int speed) |
| 91 | { |
| 92 | switch (speed) { |
| 93 | case 9600: |
| 94 | return 0x00; |
| 95 | case 19200: |
| 96 | return 0x01; |
| 97 | case 38400: |
| 98 | return 0x02; |
| 99 | case 57600: |
| 100 | return 0x03; |
| 101 | case 115200: |
| 102 | return 0x04; |
| 103 | case 230400: |
| 104 | return 0x05; |
| 105 | case 460800: |
| 106 | return 0x06; |
| 107 | case 921600: |
| 108 | return 0x07; |
| 109 | case 1843200: |
| 110 | return 0x08; |
| 111 | case 3250000: |
| 112 | return 0x09; |
| 113 | case 2000000: |
| 114 | return 0x0a; |
| 115 | case 3000000: |
| 116 | return 0x0b; |
| 117 | default: |
| 118 | return 0xff; |
| 119 | } |
| 120 | } |
| 121 | |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 122 | static int intel_wait_booting(struct hci_uart *hu) |
| 123 | { |
| 124 | struct intel_data *intel = hu->priv; |
| 125 | int err; |
| 126 | |
| 127 | err = wait_on_bit_timeout(&intel->flags, STATE_BOOTING, |
| 128 | TASK_INTERRUPTIBLE, |
| 129 | msecs_to_jiffies(1000)); |
| 130 | |
| 131 | if (err == 1) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 132 | bt_dev_err(hu->hdev, "Device boot interrupted"); |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 133 | return -EINTR; |
| 134 | } |
| 135 | |
| 136 | if (err) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 137 | bt_dev_err(hu->hdev, "Device boot timeout"); |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 138 | return -ETIMEDOUT; |
| 139 | } |
| 140 | |
| 141 | return err; |
| 142 | } |
| 143 | |
Loic Poulain | a9cb0fe | 2015-09-04 17:39:25 +0200 | [diff] [blame] | 144 | #ifdef CONFIG_PM |
Loic Poulain | 8943654 | 2015-09-02 12:04:11 +0200 | [diff] [blame] | 145 | static int intel_wait_lpm_transaction(struct hci_uart *hu) |
| 146 | { |
| 147 | struct intel_data *intel = hu->priv; |
| 148 | int err; |
| 149 | |
| 150 | err = wait_on_bit_timeout(&intel->flags, STATE_LPM_TRANSACTION, |
| 151 | TASK_INTERRUPTIBLE, |
| 152 | msecs_to_jiffies(1000)); |
| 153 | |
| 154 | if (err == 1) { |
| 155 | bt_dev_err(hu->hdev, "LPM transaction interrupted"); |
| 156 | return -EINTR; |
| 157 | } |
| 158 | |
| 159 | if (err) { |
| 160 | bt_dev_err(hu->hdev, "LPM transaction timeout"); |
| 161 | return -ETIMEDOUT; |
| 162 | } |
| 163 | |
| 164 | return err; |
| 165 | } |
| 166 | |
| 167 | static int intel_lpm_suspend(struct hci_uart *hu) |
| 168 | { |
| 169 | static const u8 suspend[] = { 0x01, 0x01, 0x01 }; |
| 170 | struct intel_data *intel = hu->priv; |
| 171 | struct sk_buff *skb; |
| 172 | |
| 173 | if (!test_bit(STATE_LPM_ENABLED, &intel->flags) || |
| 174 | test_bit(STATE_SUSPENDED, &intel->flags)) |
| 175 | return 0; |
| 176 | |
| 177 | if (test_bit(STATE_TX_ACTIVE, &intel->flags)) |
| 178 | return -EAGAIN; |
| 179 | |
| 180 | bt_dev_dbg(hu->hdev, "Suspending"); |
| 181 | |
| 182 | skb = bt_skb_alloc(sizeof(suspend), GFP_KERNEL); |
| 183 | if (!skb) { |
| 184 | bt_dev_err(hu->hdev, "Failed to alloc memory for LPM packet"); |
| 185 | return -ENOMEM; |
| 186 | } |
| 187 | |
| 188 | memcpy(skb_put(skb, sizeof(suspend)), suspend, sizeof(suspend)); |
| 189 | bt_cb(skb)->pkt_type = HCI_LPM_PKT; |
| 190 | |
| 191 | set_bit(STATE_LPM_TRANSACTION, &intel->flags); |
| 192 | |
Loic Poulain | 30e945f | 2015-09-09 19:08:02 +0200 | [diff] [blame] | 193 | /* LPM flow is a priority, enqueue packet at list head */ |
| 194 | skb_queue_head(&intel->txq, skb); |
Loic Poulain | 8943654 | 2015-09-02 12:04:11 +0200 | [diff] [blame] | 195 | hci_uart_tx_wakeup(hu); |
| 196 | |
| 197 | intel_wait_lpm_transaction(hu); |
| 198 | /* Even in case of failure, continue and test the suspended flag */ |
| 199 | |
| 200 | clear_bit(STATE_LPM_TRANSACTION, &intel->flags); |
| 201 | |
| 202 | if (!test_bit(STATE_SUSPENDED, &intel->flags)) { |
| 203 | bt_dev_err(hu->hdev, "Device suspend error"); |
| 204 | return -EINVAL; |
| 205 | } |
| 206 | |
| 207 | bt_dev_dbg(hu->hdev, "Suspended"); |
| 208 | |
| 209 | hci_uart_set_flow_control(hu, true); |
| 210 | |
| 211 | return 0; |
| 212 | } |
| 213 | |
| 214 | static int intel_lpm_resume(struct hci_uart *hu) |
| 215 | { |
| 216 | struct intel_data *intel = hu->priv; |
| 217 | struct sk_buff *skb; |
| 218 | |
| 219 | if (!test_bit(STATE_LPM_ENABLED, &intel->flags) || |
| 220 | !test_bit(STATE_SUSPENDED, &intel->flags)) |
| 221 | return 0; |
| 222 | |
| 223 | bt_dev_dbg(hu->hdev, "Resuming"); |
| 224 | |
| 225 | hci_uart_set_flow_control(hu, false); |
| 226 | |
| 227 | skb = bt_skb_alloc(0, GFP_KERNEL); |
| 228 | if (!skb) { |
| 229 | bt_dev_err(hu->hdev, "Failed to alloc memory for LPM packet"); |
| 230 | return -ENOMEM; |
| 231 | } |
| 232 | |
| 233 | bt_cb(skb)->pkt_type = HCI_LPM_WAKE_PKT; |
| 234 | |
| 235 | set_bit(STATE_LPM_TRANSACTION, &intel->flags); |
| 236 | |
Loic Poulain | 30e945f | 2015-09-09 19:08:02 +0200 | [diff] [blame] | 237 | /* LPM flow is a priority, enqueue packet at list head */ |
| 238 | skb_queue_head(&intel->txq, skb); |
Loic Poulain | 8943654 | 2015-09-02 12:04:11 +0200 | [diff] [blame] | 239 | hci_uart_tx_wakeup(hu); |
| 240 | |
| 241 | intel_wait_lpm_transaction(hu); |
| 242 | /* Even in case of failure, continue and test the suspended flag */ |
| 243 | |
| 244 | clear_bit(STATE_LPM_TRANSACTION, &intel->flags); |
| 245 | |
| 246 | if (test_bit(STATE_SUSPENDED, &intel->flags)) { |
| 247 | bt_dev_err(hu->hdev, "Device resume error"); |
| 248 | return -EINVAL; |
| 249 | } |
| 250 | |
| 251 | bt_dev_dbg(hu->hdev, "Resumed"); |
| 252 | |
| 253 | return 0; |
| 254 | } |
Loic Poulain | a9cb0fe | 2015-09-04 17:39:25 +0200 | [diff] [blame] | 255 | #endif /* CONFIG_PM */ |
Loic Poulain | 8943654 | 2015-09-02 12:04:11 +0200 | [diff] [blame] | 256 | |
| 257 | static int intel_lpm_host_wake(struct hci_uart *hu) |
| 258 | { |
| 259 | static const u8 lpm_resume_ack[] = { LPM_OP_RESUME_ACK, 0x00 }; |
| 260 | struct intel_data *intel = hu->priv; |
| 261 | struct sk_buff *skb; |
| 262 | |
| 263 | hci_uart_set_flow_control(hu, false); |
| 264 | |
| 265 | clear_bit(STATE_SUSPENDED, &intel->flags); |
| 266 | |
| 267 | skb = bt_skb_alloc(sizeof(lpm_resume_ack), GFP_KERNEL); |
| 268 | if (!skb) { |
| 269 | bt_dev_err(hu->hdev, "Failed to alloc memory for LPM packet"); |
| 270 | return -ENOMEM; |
| 271 | } |
| 272 | |
| 273 | memcpy(skb_put(skb, sizeof(lpm_resume_ack)), lpm_resume_ack, |
| 274 | sizeof(lpm_resume_ack)); |
| 275 | bt_cb(skb)->pkt_type = HCI_LPM_PKT; |
| 276 | |
Loic Poulain | 30e945f | 2015-09-09 19:08:02 +0200 | [diff] [blame] | 277 | /* LPM flow is a priority, enqueue packet at list head */ |
| 278 | skb_queue_head(&intel->txq, skb); |
Loic Poulain | 8943654 | 2015-09-02 12:04:11 +0200 | [diff] [blame] | 279 | hci_uart_tx_wakeup(hu); |
| 280 | |
| 281 | bt_dev_dbg(hu->hdev, "Resumed by controller"); |
| 282 | |
| 283 | return 0; |
| 284 | } |
| 285 | |
Loic Poulain | 765ea3a | 2015-08-29 13:38:18 +0200 | [diff] [blame] | 286 | static irqreturn_t intel_irq(int irq, void *dev_id) |
| 287 | { |
| 288 | struct intel_device *idev = dev_id; |
| 289 | |
| 290 | dev_info(&idev->pdev->dev, "hci_intel irq\n"); |
| 291 | |
Loic Poulain | aa6802d | 2015-09-02 12:04:12 +0200 | [diff] [blame] | 292 | mutex_lock(&idev->hu_lock); |
| 293 | if (idev->hu) |
| 294 | intel_lpm_host_wake(idev->hu); |
| 295 | mutex_unlock(&idev->hu_lock); |
| 296 | |
Loic Poulain | 74cdad3 | 2015-09-02 12:04:13 +0200 | [diff] [blame] | 297 | /* Host/Controller are now LPM resumed, trigger a new delayed suspend */ |
| 298 | pm_runtime_get(&idev->pdev->dev); |
| 299 | pm_runtime_mark_last_busy(&idev->pdev->dev); |
| 300 | pm_runtime_put_autosuspend(&idev->pdev->dev); |
| 301 | |
Loic Poulain | 765ea3a | 2015-08-29 13:38:18 +0200 | [diff] [blame] | 302 | return IRQ_HANDLED; |
| 303 | } |
| 304 | |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 305 | static int intel_set_power(struct hci_uart *hu, bool powered) |
| 306 | { |
| 307 | struct list_head *p; |
| 308 | int err = -ENODEV; |
| 309 | |
Loic Poulain | 67c8bde | 2015-08-31 18:34:31 +0200 | [diff] [blame] | 310 | mutex_lock(&intel_device_list_lock); |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 311 | |
| 312 | list_for_each(p, &intel_device_list) { |
| 313 | struct intel_device *idev = list_entry(p, struct intel_device, |
| 314 | list); |
| 315 | |
| 316 | /* tty device and pdev device should share the same parent |
| 317 | * which is the UART port. |
| 318 | */ |
| 319 | if (hu->tty->dev->parent != idev->pdev->dev.parent) |
| 320 | continue; |
| 321 | |
| 322 | if (!idev->reset) { |
| 323 | err = -ENOTSUPP; |
| 324 | break; |
| 325 | } |
| 326 | |
| 327 | BT_INFO("hu %p, Switching compatible pm device (%s) to %u", |
| 328 | hu, dev_name(&idev->pdev->dev), powered); |
| 329 | |
| 330 | gpiod_set_value(idev->reset, powered); |
Loic Poulain | 765ea3a | 2015-08-29 13:38:18 +0200 | [diff] [blame] | 331 | |
Loic Poulain | aa6802d | 2015-09-02 12:04:12 +0200 | [diff] [blame] | 332 | /* Provide to idev a hu reference which is used to run LPM |
| 333 | * transactions (lpm suspend/resume) from PM callbacks. |
| 334 | * hu needs to be protected against concurrent removing during |
| 335 | * these PM ops. |
| 336 | */ |
| 337 | mutex_lock(&idev->hu_lock); |
| 338 | idev->hu = powered ? hu : NULL; |
| 339 | mutex_unlock(&idev->hu_lock); |
| 340 | |
Loic Poulain | 765ea3a | 2015-08-29 13:38:18 +0200 | [diff] [blame] | 341 | if (idev->irq < 0) |
| 342 | break; |
| 343 | |
| 344 | if (powered && device_can_wakeup(&idev->pdev->dev)) { |
| 345 | err = devm_request_threaded_irq(&idev->pdev->dev, |
| 346 | idev->irq, NULL, |
| 347 | intel_irq, |
| 348 | IRQF_ONESHOT, |
| 349 | "bt-host-wake", idev); |
| 350 | if (err) { |
| 351 | BT_ERR("hu %p, unable to allocate irq-%d", |
| 352 | hu, idev->irq); |
| 353 | break; |
| 354 | } |
| 355 | |
| 356 | device_wakeup_enable(&idev->pdev->dev); |
Loic Poulain | 74cdad3 | 2015-09-02 12:04:13 +0200 | [diff] [blame] | 357 | |
| 358 | pm_runtime_set_active(&idev->pdev->dev); |
| 359 | pm_runtime_use_autosuspend(&idev->pdev->dev); |
| 360 | pm_runtime_set_autosuspend_delay(&idev->pdev->dev, |
| 361 | LPM_SUSPEND_DELAY_MS); |
| 362 | pm_runtime_enable(&idev->pdev->dev); |
Loic Poulain | 765ea3a | 2015-08-29 13:38:18 +0200 | [diff] [blame] | 363 | } else if (!powered && device_may_wakeup(&idev->pdev->dev)) { |
| 364 | devm_free_irq(&idev->pdev->dev, idev->irq, idev); |
| 365 | device_wakeup_disable(&idev->pdev->dev); |
Loic Poulain | 74cdad3 | 2015-09-02 12:04:13 +0200 | [diff] [blame] | 366 | |
| 367 | pm_runtime_disable(&idev->pdev->dev); |
Loic Poulain | 765ea3a | 2015-08-29 13:38:18 +0200 | [diff] [blame] | 368 | } |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 369 | } |
| 370 | |
Loic Poulain | 67c8bde | 2015-08-31 18:34:31 +0200 | [diff] [blame] | 371 | mutex_unlock(&intel_device_list_lock); |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 372 | |
| 373 | return err; |
| 374 | } |
| 375 | |
Loic Poulain | 74cdad3 | 2015-09-02 12:04:13 +0200 | [diff] [blame] | 376 | static void intel_busy_work(struct work_struct *work) |
| 377 | { |
| 378 | struct list_head *p; |
| 379 | struct intel_data *intel = container_of(work, struct intel_data, |
| 380 | busy_work); |
| 381 | |
| 382 | /* Link is busy, delay the suspend */ |
| 383 | mutex_lock(&intel_device_list_lock); |
| 384 | list_for_each(p, &intel_device_list) { |
| 385 | struct intel_device *idev = list_entry(p, struct intel_device, |
| 386 | list); |
| 387 | |
| 388 | if (intel->hu->tty->dev->parent == idev->pdev->dev.parent) { |
| 389 | pm_runtime_get(&idev->pdev->dev); |
| 390 | pm_runtime_mark_last_busy(&idev->pdev->dev); |
| 391 | pm_runtime_put_autosuspend(&idev->pdev->dev); |
| 392 | break; |
| 393 | } |
| 394 | } |
| 395 | mutex_unlock(&intel_device_list_lock); |
| 396 | } |
| 397 | |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 398 | static int intel_open(struct hci_uart *hu) |
| 399 | { |
| 400 | struct intel_data *intel; |
| 401 | |
| 402 | BT_DBG("hu %p", hu); |
| 403 | |
| 404 | intel = kzalloc(sizeof(*intel), GFP_KERNEL); |
| 405 | if (!intel) |
| 406 | return -ENOMEM; |
| 407 | |
| 408 | skb_queue_head_init(&intel->txq); |
Loic Poulain | 74cdad3 | 2015-09-02 12:04:13 +0200 | [diff] [blame] | 409 | INIT_WORK(&intel->busy_work, intel_busy_work); |
| 410 | |
| 411 | intel->hu = hu; |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 412 | |
| 413 | hu->priv = intel; |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 414 | |
| 415 | if (!intel_set_power(hu, true)) |
| 416 | set_bit(STATE_BOOTING, &intel->flags); |
| 417 | |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 418 | return 0; |
| 419 | } |
| 420 | |
| 421 | static int intel_close(struct hci_uart *hu) |
| 422 | { |
| 423 | struct intel_data *intel = hu->priv; |
| 424 | |
| 425 | BT_DBG("hu %p", hu); |
| 426 | |
Loic Poulain | 74cdad3 | 2015-09-02 12:04:13 +0200 | [diff] [blame] | 427 | cancel_work_sync(&intel->busy_work); |
| 428 | |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 429 | intel_set_power(hu, false); |
| 430 | |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 431 | skb_queue_purge(&intel->txq); |
| 432 | kfree_skb(intel->rx_skb); |
| 433 | kfree(intel); |
| 434 | |
| 435 | hu->priv = NULL; |
| 436 | return 0; |
| 437 | } |
| 438 | |
| 439 | static int intel_flush(struct hci_uart *hu) |
| 440 | { |
| 441 | struct intel_data *intel = hu->priv; |
| 442 | |
| 443 | BT_DBG("hu %p", hu); |
| 444 | |
| 445 | skb_queue_purge(&intel->txq); |
| 446 | |
| 447 | return 0; |
| 448 | } |
| 449 | |
| 450 | static int inject_cmd_complete(struct hci_dev *hdev, __u16 opcode) |
| 451 | { |
| 452 | struct sk_buff *skb; |
| 453 | struct hci_event_hdr *hdr; |
| 454 | struct hci_ev_cmd_complete *evt; |
| 455 | |
| 456 | skb = bt_skb_alloc(sizeof(*hdr) + sizeof(*evt) + 1, GFP_ATOMIC); |
| 457 | if (!skb) |
| 458 | return -ENOMEM; |
| 459 | |
| 460 | hdr = (struct hci_event_hdr *)skb_put(skb, sizeof(*hdr)); |
| 461 | hdr->evt = HCI_EV_CMD_COMPLETE; |
| 462 | hdr->plen = sizeof(*evt) + 1; |
| 463 | |
| 464 | evt = (struct hci_ev_cmd_complete *)skb_put(skb, sizeof(*evt)); |
| 465 | evt->ncmd = 0x01; |
| 466 | evt->opcode = cpu_to_le16(opcode); |
| 467 | |
| 468 | *skb_put(skb, 1) = 0x00; |
| 469 | |
| 470 | bt_cb(skb)->pkt_type = HCI_EVENT_PKT; |
| 471 | |
| 472 | return hci_recv_frame(hdev, skb); |
| 473 | } |
| 474 | |
Loic Poulain | ff28955 | 2015-08-25 17:55:44 +0200 | [diff] [blame] | 475 | static int intel_set_baudrate(struct hci_uart *hu, unsigned int speed) |
| 476 | { |
| 477 | struct intel_data *intel = hu->priv; |
| 478 | struct hci_dev *hdev = hu->hdev; |
| 479 | u8 speed_cmd[] = { 0x06, 0xfc, 0x01, 0x00 }; |
| 480 | struct sk_buff *skb; |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 481 | int err; |
| 482 | |
| 483 | /* This can be the first command sent to the chip, check |
| 484 | * that the controller is ready. |
| 485 | */ |
| 486 | err = intel_wait_booting(hu); |
| 487 | |
| 488 | clear_bit(STATE_BOOTING, &intel->flags); |
| 489 | |
| 490 | /* In case of timeout, try to continue anyway */ |
| 491 | if (err && err != ETIMEDOUT) |
| 492 | return err; |
Loic Poulain | ff28955 | 2015-08-25 17:55:44 +0200 | [diff] [blame] | 493 | |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 494 | bt_dev_info(hdev, "Change controller speed to %d", speed); |
Loic Poulain | ff28955 | 2015-08-25 17:55:44 +0200 | [diff] [blame] | 495 | |
| 496 | speed_cmd[3] = intel_convert_speed(speed); |
| 497 | if (speed_cmd[3] == 0xff) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 498 | bt_dev_err(hdev, "Unsupported speed"); |
Loic Poulain | ff28955 | 2015-08-25 17:55:44 +0200 | [diff] [blame] | 499 | return -EINVAL; |
| 500 | } |
| 501 | |
| 502 | /* Device will not accept speed change if Intel version has not been |
| 503 | * previously requested. |
| 504 | */ |
| 505 | skb = __hci_cmd_sync(hdev, 0xfc05, 0, NULL, HCI_INIT_TIMEOUT); |
| 506 | if (IS_ERR(skb)) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 507 | bt_dev_err(hdev, "Reading Intel version information failed (%ld)", |
| 508 | PTR_ERR(skb)); |
Loic Poulain | ff28955 | 2015-08-25 17:55:44 +0200 | [diff] [blame] | 509 | return PTR_ERR(skb); |
| 510 | } |
| 511 | kfree_skb(skb); |
| 512 | |
| 513 | skb = bt_skb_alloc(sizeof(speed_cmd), GFP_KERNEL); |
| 514 | if (!skb) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 515 | bt_dev_err(hdev, "Failed to alloc memory for baudrate packet"); |
Loic Poulain | ff28955 | 2015-08-25 17:55:44 +0200 | [diff] [blame] | 516 | return -ENOMEM; |
| 517 | } |
| 518 | |
| 519 | memcpy(skb_put(skb, sizeof(speed_cmd)), speed_cmd, sizeof(speed_cmd)); |
| 520 | bt_cb(skb)->pkt_type = HCI_COMMAND_PKT; |
| 521 | |
| 522 | hci_uart_set_flow_control(hu, true); |
| 523 | |
| 524 | skb_queue_tail(&intel->txq, skb); |
| 525 | hci_uart_tx_wakeup(hu); |
| 526 | |
| 527 | /* wait 100ms to change baudrate on controller side */ |
| 528 | msleep(100); |
| 529 | |
| 530 | hci_uart_set_baudrate(hu, speed); |
| 531 | hci_uart_set_flow_control(hu, false); |
| 532 | |
| 533 | return 0; |
| 534 | } |
| 535 | |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 536 | static int intel_setup(struct hci_uart *hu) |
| 537 | { |
| 538 | static const u8 reset_param[] = { 0x00, 0x01, 0x00, 0x01, |
| 539 | 0x00, 0x08, 0x04, 0x00 }; |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 540 | static const u8 lpm_param[] = { 0x03, 0x07, 0x01, 0x0b }; |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 541 | struct intel_data *intel = hu->priv; |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 542 | struct intel_device *idev = NULL; |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 543 | struct hci_dev *hdev = hu->hdev; |
| 544 | struct sk_buff *skb; |
| 545 | struct intel_version *ver; |
| 546 | struct intel_boot_params *params; |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 547 | struct list_head *p; |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 548 | const struct firmware *fw; |
| 549 | const u8 *fw_ptr; |
| 550 | char fwname[64]; |
| 551 | u32 frag_len; |
| 552 | ktime_t calltime, delta, rettime; |
| 553 | unsigned long long duration; |
Loic Poulain | ff28955 | 2015-08-25 17:55:44 +0200 | [diff] [blame] | 554 | unsigned int init_speed, oper_speed; |
| 555 | int speed_change = 0; |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 556 | int err; |
| 557 | |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 558 | bt_dev_dbg(hdev, "start intel_setup"); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 559 | |
Marcel Holtmann | 6d2e50d | 2015-10-09 14:42:08 +0200 | [diff] [blame] | 560 | hu->hdev->set_diag = btintel_set_diag; |
Marcel Holtmann | 35ab815 | 2015-07-05 14:37:40 +0200 | [diff] [blame] | 561 | hu->hdev->set_bdaddr = btintel_set_bdaddr; |
| 562 | |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 563 | calltime = ktime_get(); |
| 564 | |
Loic Poulain | ff28955 | 2015-08-25 17:55:44 +0200 | [diff] [blame] | 565 | if (hu->init_speed) |
| 566 | init_speed = hu->init_speed; |
| 567 | else |
| 568 | init_speed = hu->proto->init_speed; |
| 569 | |
| 570 | if (hu->oper_speed) |
| 571 | oper_speed = hu->oper_speed; |
| 572 | else |
| 573 | oper_speed = hu->proto->oper_speed; |
| 574 | |
| 575 | if (oper_speed && init_speed && oper_speed != init_speed) |
| 576 | speed_change = 1; |
| 577 | |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 578 | /* Check that the controller is ready */ |
| 579 | err = intel_wait_booting(hu); |
| 580 | |
| 581 | clear_bit(STATE_BOOTING, &intel->flags); |
| 582 | |
| 583 | /* In case of timeout, try to continue anyway */ |
| 584 | if (err && err != ETIMEDOUT) |
| 585 | return err; |
| 586 | |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 587 | set_bit(STATE_BOOTLOADER, &intel->flags); |
| 588 | |
| 589 | /* Read the Intel version information to determine if the device |
| 590 | * is in bootloader mode or if it already has operational firmware |
| 591 | * loaded. |
| 592 | */ |
| 593 | skb = __hci_cmd_sync(hdev, 0xfc05, 0, NULL, HCI_INIT_TIMEOUT); |
| 594 | if (IS_ERR(skb)) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 595 | bt_dev_err(hdev, "Reading Intel version information failed (%ld)", |
| 596 | PTR_ERR(skb)); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 597 | return PTR_ERR(skb); |
| 598 | } |
| 599 | |
| 600 | if (skb->len != sizeof(*ver)) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 601 | bt_dev_err(hdev, "Intel version event size mismatch"); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 602 | kfree_skb(skb); |
| 603 | return -EILSEQ; |
| 604 | } |
| 605 | |
| 606 | ver = (struct intel_version *)skb->data; |
| 607 | if (ver->status) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 608 | bt_dev_err(hdev, "Intel version command failure (%02x)", |
| 609 | ver->status); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 610 | err = -bt_to_errno(ver->status); |
| 611 | kfree_skb(skb); |
| 612 | return err; |
| 613 | } |
| 614 | |
| 615 | /* The hardware platform number has a fixed value of 0x37 and |
| 616 | * for now only accept this single value. |
| 617 | */ |
| 618 | if (ver->hw_platform != 0x37) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 619 | bt_dev_err(hdev, "Unsupported Intel hardware platform (%u)", |
| 620 | ver->hw_platform); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 621 | kfree_skb(skb); |
| 622 | return -EINVAL; |
| 623 | } |
| 624 | |
| 625 | /* At the moment only the hardware variant iBT 3.0 (LnP/SfP) is |
| 626 | * supported by this firmware loading method. This check has been |
| 627 | * put in place to ensure correct forward compatibility options |
| 628 | * when newer hardware variants come along. |
| 629 | */ |
| 630 | if (ver->hw_variant != 0x0b) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 631 | bt_dev_err(hdev, "Unsupported Intel hardware variant (%u)", |
| 632 | ver->hw_variant); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 633 | kfree_skb(skb); |
| 634 | return -EINVAL; |
| 635 | } |
| 636 | |
Marcel Holtmann | 7feb99e | 2015-07-05 15:02:07 +0200 | [diff] [blame] | 637 | btintel_version_info(hdev, ver); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 638 | |
| 639 | /* The firmware variant determines if the device is in bootloader |
| 640 | * mode or is running operational firmware. The value 0x06 identifies |
| 641 | * the bootloader and the value 0x23 identifies the operational |
| 642 | * firmware. |
| 643 | * |
| 644 | * When the operational firmware is already present, then only |
| 645 | * the check for valid Bluetooth device address is needed. This |
| 646 | * determines if the device will be added as configured or |
| 647 | * unconfigured controller. |
| 648 | * |
| 649 | * It is not possible to use the Secure Boot Parameters in this |
| 650 | * case since that command is only available in bootloader mode. |
| 651 | */ |
| 652 | if (ver->fw_variant == 0x23) { |
| 653 | kfree_skb(skb); |
| 654 | clear_bit(STATE_BOOTLOADER, &intel->flags); |
| 655 | btintel_check_bdaddr(hdev); |
| 656 | return 0; |
| 657 | } |
| 658 | |
| 659 | /* If the device is not in bootloader mode, then the only possible |
| 660 | * choice is to return an error and abort the device initialization. |
| 661 | */ |
| 662 | if (ver->fw_variant != 0x06) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 663 | bt_dev_err(hdev, "Unsupported Intel firmware variant (%u)", |
| 664 | ver->fw_variant); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 665 | kfree_skb(skb); |
| 666 | return -ENODEV; |
| 667 | } |
| 668 | |
| 669 | kfree_skb(skb); |
| 670 | |
| 671 | /* Read the secure boot parameters to identify the operating |
| 672 | * details of the bootloader. |
| 673 | */ |
| 674 | skb = __hci_cmd_sync(hdev, 0xfc0d, 0, NULL, HCI_INIT_TIMEOUT); |
| 675 | if (IS_ERR(skb)) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 676 | bt_dev_err(hdev, "Reading Intel boot parameters failed (%ld)", |
| 677 | PTR_ERR(skb)); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 678 | return PTR_ERR(skb); |
| 679 | } |
| 680 | |
| 681 | if (skb->len != sizeof(*params)) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 682 | bt_dev_err(hdev, "Intel boot parameters size mismatch"); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 683 | kfree_skb(skb); |
| 684 | return -EILSEQ; |
| 685 | } |
| 686 | |
| 687 | params = (struct intel_boot_params *)skb->data; |
| 688 | if (params->status) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 689 | bt_dev_err(hdev, "Intel boot parameters command failure (%02x)", |
| 690 | params->status); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 691 | err = -bt_to_errno(params->status); |
| 692 | kfree_skb(skb); |
| 693 | return err; |
| 694 | } |
| 695 | |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 696 | bt_dev_info(hdev, "Device revision is %u", |
| 697 | le16_to_cpu(params->dev_revid)); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 698 | |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 699 | bt_dev_info(hdev, "Secure boot is %s", |
| 700 | params->secure_boot ? "enabled" : "disabled"); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 701 | |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 702 | bt_dev_info(hdev, "Minimum firmware build %u week %u %u", |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 703 | params->min_fw_build_nn, params->min_fw_build_cw, |
| 704 | 2000 + params->min_fw_build_yy); |
| 705 | |
| 706 | /* It is required that every single firmware fragment is acknowledged |
| 707 | * with a command complete event. If the boot parameters indicate |
| 708 | * that this bootloader does not send them, then abort the setup. |
| 709 | */ |
| 710 | if (params->limited_cce != 0x00) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 711 | bt_dev_err(hdev, "Unsupported Intel firmware loading method (%u)", |
| 712 | params->limited_cce); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 713 | kfree_skb(skb); |
| 714 | return -EINVAL; |
| 715 | } |
| 716 | |
| 717 | /* If the OTP has no valid Bluetooth device address, then there will |
| 718 | * also be no valid address for the operational firmware. |
| 719 | */ |
| 720 | if (!bacmp(¶ms->otp_bdaddr, BDADDR_ANY)) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 721 | bt_dev_info(hdev, "No device address configured"); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 722 | set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks); |
| 723 | } |
| 724 | |
| 725 | /* With this Intel bootloader only the hardware variant and device |
| 726 | * revision information are used to select the right firmware. |
| 727 | * |
| 728 | * Currently this bootloader support is limited to hardware variant |
| 729 | * iBT 3.0 (LnP/SfP) which is identified by the value 11 (0x0b). |
| 730 | */ |
| 731 | snprintf(fwname, sizeof(fwname), "intel/ibt-11-%u.sfi", |
| 732 | le16_to_cpu(params->dev_revid)); |
| 733 | |
| 734 | err = request_firmware(&fw, fwname, &hdev->dev); |
| 735 | if (err < 0) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 736 | bt_dev_err(hdev, "Failed to load Intel firmware file (%d)", |
| 737 | err); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 738 | kfree_skb(skb); |
| 739 | return err; |
| 740 | } |
| 741 | |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 742 | bt_dev_info(hdev, "Found device firmware: %s", fwname); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 743 | |
Loic Poulain | 1cfbabd | 2015-09-04 17:54:35 +0200 | [diff] [blame] | 744 | /* Save the DDC file name for later */ |
| 745 | snprintf(fwname, sizeof(fwname), "intel/ibt-11-%u.ddc", |
| 746 | le16_to_cpu(params->dev_revid)); |
| 747 | |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 748 | kfree_skb(skb); |
| 749 | |
| 750 | if (fw->size < 644) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 751 | bt_dev_err(hdev, "Invalid size of firmware file (%zu)", |
| 752 | fw->size); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 753 | err = -EBADF; |
| 754 | goto done; |
| 755 | } |
| 756 | |
| 757 | set_bit(STATE_DOWNLOADING, &intel->flags); |
| 758 | |
| 759 | /* Start the firmware download transaction with the Init fragment |
| 760 | * represented by the 128 bytes of CSS header. |
| 761 | */ |
Marcel Holtmann | 09df123 | 2015-07-05 14:55:36 +0200 | [diff] [blame] | 762 | err = btintel_secure_send(hdev, 0x00, 128, fw->data); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 763 | if (err < 0) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 764 | bt_dev_err(hdev, "Failed to send firmware header (%d)", err); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 765 | goto done; |
| 766 | } |
| 767 | |
| 768 | /* Send the 256 bytes of public key information from the firmware |
| 769 | * as the PKey fragment. |
| 770 | */ |
Marcel Holtmann | 09df123 | 2015-07-05 14:55:36 +0200 | [diff] [blame] | 771 | err = btintel_secure_send(hdev, 0x03, 256, fw->data + 128); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 772 | if (err < 0) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 773 | bt_dev_err(hdev, "Failed to send firmware public key (%d)", |
| 774 | err); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 775 | goto done; |
| 776 | } |
| 777 | |
| 778 | /* Send the 256 bytes of signature information from the firmware |
| 779 | * as the Sign fragment. |
| 780 | */ |
Marcel Holtmann | 09df123 | 2015-07-05 14:55:36 +0200 | [diff] [blame] | 781 | err = btintel_secure_send(hdev, 0x02, 256, fw->data + 388); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 782 | if (err < 0) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 783 | bt_dev_err(hdev, "Failed to send firmware signature (%d)", |
| 784 | err); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 785 | goto done; |
| 786 | } |
| 787 | |
| 788 | fw_ptr = fw->data + 644; |
| 789 | frag_len = 0; |
| 790 | |
| 791 | while (fw_ptr - fw->data < fw->size) { |
| 792 | struct hci_command_hdr *cmd = (void *)(fw_ptr + frag_len); |
| 793 | |
| 794 | frag_len += sizeof(*cmd) + cmd->plen; |
| 795 | |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 796 | bt_dev_dbg(hdev, "Patching %td/%zu", (fw_ptr - fw->data), |
| 797 | fw->size); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 798 | |
| 799 | /* The parameter length of the secure send command requires |
| 800 | * a 4 byte alignment. It happens so that the firmware file |
| 801 | * contains proper Intel_NOP commands to align the fragments |
| 802 | * as needed. |
| 803 | * |
| 804 | * Send set of commands with 4 byte alignment from the |
| 805 | * firmware data buffer as a single Data fragement. |
| 806 | */ |
| 807 | if (frag_len % 4) |
| 808 | continue; |
| 809 | |
| 810 | /* Send each command from the firmware data buffer as |
| 811 | * a single Data fragment. |
| 812 | */ |
Marcel Holtmann | 09df123 | 2015-07-05 14:55:36 +0200 | [diff] [blame] | 813 | err = btintel_secure_send(hdev, 0x01, frag_len, fw_ptr); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 814 | if (err < 0) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 815 | bt_dev_err(hdev, "Failed to send firmware data (%d)", |
| 816 | err); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 817 | goto done; |
| 818 | } |
| 819 | |
| 820 | fw_ptr += frag_len; |
| 821 | frag_len = 0; |
| 822 | } |
| 823 | |
| 824 | set_bit(STATE_FIRMWARE_LOADED, &intel->flags); |
| 825 | |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 826 | bt_dev_info(hdev, "Waiting for firmware download to complete"); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 827 | |
| 828 | /* Before switching the device into operational mode and with that |
| 829 | * booting the loaded firmware, wait for the bootloader notification |
| 830 | * that all fragments have been successfully received. |
| 831 | * |
| 832 | * When the event processing receives the notification, then the |
| 833 | * STATE_DOWNLOADING flag will be cleared. |
| 834 | * |
| 835 | * The firmware loading should not take longer than 5 seconds |
| 836 | * and thus just timeout if that happens and fail the setup |
| 837 | * of this device. |
| 838 | */ |
| 839 | err = wait_on_bit_timeout(&intel->flags, STATE_DOWNLOADING, |
| 840 | TASK_INTERRUPTIBLE, |
| 841 | msecs_to_jiffies(5000)); |
| 842 | if (err == 1) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 843 | bt_dev_err(hdev, "Firmware loading interrupted"); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 844 | err = -EINTR; |
| 845 | goto done; |
| 846 | } |
| 847 | |
| 848 | if (err) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 849 | bt_dev_err(hdev, "Firmware loading timeout"); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 850 | err = -ETIMEDOUT; |
| 851 | goto done; |
| 852 | } |
| 853 | |
| 854 | if (test_bit(STATE_FIRMWARE_FAILED, &intel->flags)) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 855 | bt_dev_err(hdev, "Firmware loading failed"); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 856 | err = -ENOEXEC; |
| 857 | goto done; |
| 858 | } |
| 859 | |
| 860 | rettime = ktime_get(); |
| 861 | delta = ktime_sub(rettime, calltime); |
| 862 | duration = (unsigned long long) ktime_to_ns(delta) >> 10; |
| 863 | |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 864 | bt_dev_info(hdev, "Firmware loaded in %llu usecs", duration); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 865 | |
| 866 | done: |
| 867 | release_firmware(fw); |
| 868 | |
| 869 | if (err < 0) |
| 870 | return err; |
| 871 | |
Loic Poulain | ff28955 | 2015-08-25 17:55:44 +0200 | [diff] [blame] | 872 | /* We need to restore the default speed before Intel reset */ |
| 873 | if (speed_change) { |
| 874 | err = intel_set_baudrate(hu, init_speed); |
| 875 | if (err) |
| 876 | return err; |
| 877 | } |
| 878 | |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 879 | calltime = ktime_get(); |
| 880 | |
| 881 | set_bit(STATE_BOOTING, &intel->flags); |
| 882 | |
| 883 | skb = __hci_cmd_sync(hdev, 0xfc01, sizeof(reset_param), reset_param, |
| 884 | HCI_INIT_TIMEOUT); |
| 885 | if (IS_ERR(skb)) |
| 886 | return PTR_ERR(skb); |
| 887 | |
| 888 | kfree_skb(skb); |
| 889 | |
| 890 | /* The bootloader will not indicate when the device is ready. This |
| 891 | * is done by the operational firmware sending bootup notification. |
| 892 | * |
| 893 | * Booting into operational firmware should not take longer than |
| 894 | * 1 second. However if that happens, then just fail the setup |
| 895 | * since something went wrong. |
| 896 | */ |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 897 | bt_dev_info(hdev, "Waiting for device to boot"); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 898 | |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 899 | err = intel_wait_booting(hu); |
| 900 | if (err) |
| 901 | return err; |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 902 | |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 903 | clear_bit(STATE_BOOTING, &intel->flags); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 904 | |
| 905 | rettime = ktime_get(); |
| 906 | delta = ktime_sub(rettime, calltime); |
| 907 | duration = (unsigned long long) ktime_to_ns(delta) >> 10; |
| 908 | |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 909 | bt_dev_info(hdev, "Device booted in %llu usecs", duration); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 910 | |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 911 | /* Enable LPM if matching pdev with wakeup enabled */ |
Loic Poulain | 67c8bde | 2015-08-31 18:34:31 +0200 | [diff] [blame] | 912 | mutex_lock(&intel_device_list_lock); |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 913 | list_for_each(p, &intel_device_list) { |
| 914 | struct intel_device *dev = list_entry(p, struct intel_device, |
| 915 | list); |
| 916 | if (hu->tty->dev->parent == dev->pdev->dev.parent) { |
| 917 | if (device_may_wakeup(&dev->pdev->dev)) |
| 918 | idev = dev; |
| 919 | break; |
| 920 | } |
| 921 | } |
Loic Poulain | 67c8bde | 2015-08-31 18:34:31 +0200 | [diff] [blame] | 922 | mutex_unlock(&intel_device_list_lock); |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 923 | |
| 924 | if (!idev) |
| 925 | goto no_lpm; |
| 926 | |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 927 | bt_dev_info(hdev, "Enabling LPM"); |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 928 | |
| 929 | skb = __hci_cmd_sync(hdev, 0xfc8b, sizeof(lpm_param), lpm_param, |
| 930 | HCI_CMD_TIMEOUT); |
| 931 | if (IS_ERR(skb)) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 932 | bt_dev_err(hdev, "Failed to enable LPM"); |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 933 | goto no_lpm; |
| 934 | } |
| 935 | kfree_skb(skb); |
| 936 | |
| 937 | set_bit(STATE_LPM_ENABLED, &intel->flags); |
| 938 | |
| 939 | no_lpm: |
Loic Poulain | 1cfbabd | 2015-09-04 17:54:35 +0200 | [diff] [blame] | 940 | /* Ignore errors, device can work without DDC parameters */ |
| 941 | btintel_load_ddc_config(hdev, fwname); |
| 942 | |
Loic Poulain | ff28955 | 2015-08-25 17:55:44 +0200 | [diff] [blame] | 943 | skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_CMD_TIMEOUT); |
| 944 | if (IS_ERR(skb)) |
| 945 | return PTR_ERR(skb); |
| 946 | kfree_skb(skb); |
| 947 | |
| 948 | if (speed_change) { |
| 949 | err = intel_set_baudrate(hu, oper_speed); |
| 950 | if (err) |
| 951 | return err; |
| 952 | } |
| 953 | |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 954 | bt_dev_info(hdev, "Setup complete"); |
Loic Poulain | ff28955 | 2015-08-25 17:55:44 +0200 | [diff] [blame] | 955 | |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 956 | clear_bit(STATE_BOOTLOADER, &intel->flags); |
| 957 | |
| 958 | return 0; |
| 959 | } |
| 960 | |
| 961 | static int intel_recv_event(struct hci_dev *hdev, struct sk_buff *skb) |
| 962 | { |
| 963 | struct hci_uart *hu = hci_get_drvdata(hdev); |
| 964 | struct intel_data *intel = hu->priv; |
| 965 | struct hci_event_hdr *hdr; |
| 966 | |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 967 | if (!test_bit(STATE_BOOTLOADER, &intel->flags) && |
| 968 | !test_bit(STATE_BOOTING, &intel->flags)) |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 969 | goto recv; |
| 970 | |
| 971 | hdr = (void *)skb->data; |
| 972 | |
| 973 | /* When the firmware loading completes the device sends |
| 974 | * out a vendor specific event indicating the result of |
| 975 | * the firmware loading. |
| 976 | */ |
| 977 | if (skb->len == 7 && hdr->evt == 0xff && hdr->plen == 0x05 && |
| 978 | skb->data[2] == 0x06) { |
| 979 | if (skb->data[3] != 0x00) |
| 980 | set_bit(STATE_FIRMWARE_FAILED, &intel->flags); |
| 981 | |
| 982 | if (test_and_clear_bit(STATE_DOWNLOADING, &intel->flags) && |
| 983 | test_bit(STATE_FIRMWARE_LOADED, &intel->flags)) { |
| 984 | smp_mb__after_atomic(); |
| 985 | wake_up_bit(&intel->flags, STATE_DOWNLOADING); |
| 986 | } |
| 987 | |
| 988 | /* When switching to the operational firmware the device |
| 989 | * sends a vendor specific event indicating that the bootup |
| 990 | * completed. |
| 991 | */ |
| 992 | } else if (skb->len == 9 && hdr->evt == 0xff && hdr->plen == 0x07 && |
| 993 | skb->data[2] == 0x02) { |
| 994 | if (test_and_clear_bit(STATE_BOOTING, &intel->flags)) { |
| 995 | smp_mb__after_atomic(); |
| 996 | wake_up_bit(&intel->flags, STATE_BOOTING); |
| 997 | } |
| 998 | } |
| 999 | recv: |
| 1000 | return hci_recv_frame(hdev, skb); |
| 1001 | } |
| 1002 | |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 1003 | static void intel_recv_lpm_notify(struct hci_dev *hdev, int value) |
| 1004 | { |
| 1005 | struct hci_uart *hu = hci_get_drvdata(hdev); |
| 1006 | struct intel_data *intel = hu->priv; |
| 1007 | |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 1008 | bt_dev_dbg(hdev, "TX idle notification (%d)", value); |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 1009 | |
Loic Poulain | 74cdad3 | 2015-09-02 12:04:13 +0200 | [diff] [blame] | 1010 | if (value) { |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 1011 | set_bit(STATE_TX_ACTIVE, &intel->flags); |
Loic Poulain | 74cdad3 | 2015-09-02 12:04:13 +0200 | [diff] [blame] | 1012 | schedule_work(&intel->busy_work); |
| 1013 | } else { |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 1014 | clear_bit(STATE_TX_ACTIVE, &intel->flags); |
Loic Poulain | 74cdad3 | 2015-09-02 12:04:13 +0200 | [diff] [blame] | 1015 | } |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 1016 | } |
| 1017 | |
| 1018 | static int intel_recv_lpm(struct hci_dev *hdev, struct sk_buff *skb) |
| 1019 | { |
| 1020 | struct hci_lpm_pkt *lpm = (void *)skb->data; |
Loic Poulain | 8943654 | 2015-09-02 12:04:11 +0200 | [diff] [blame] | 1021 | struct hci_uart *hu = hci_get_drvdata(hdev); |
| 1022 | struct intel_data *intel = hu->priv; |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 1023 | |
| 1024 | switch (lpm->opcode) { |
| 1025 | case LPM_OP_TX_NOTIFY: |
Loic Poulain | 1b19757 | 2015-09-02 12:04:14 +0200 | [diff] [blame] | 1026 | if (lpm->dlen < 1) { |
| 1027 | bt_dev_err(hu->hdev, "Invalid LPM notification packet"); |
| 1028 | break; |
| 1029 | } |
| 1030 | intel_recv_lpm_notify(hdev, lpm->data[0]); |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 1031 | break; |
Loic Poulain | 8943654 | 2015-09-02 12:04:11 +0200 | [diff] [blame] | 1032 | case LPM_OP_SUSPEND_ACK: |
| 1033 | set_bit(STATE_SUSPENDED, &intel->flags); |
| 1034 | if (test_and_clear_bit(STATE_LPM_TRANSACTION, &intel->flags)) { |
| 1035 | smp_mb__after_atomic(); |
| 1036 | wake_up_bit(&intel->flags, STATE_LPM_TRANSACTION); |
| 1037 | } |
| 1038 | break; |
| 1039 | case LPM_OP_RESUME_ACK: |
| 1040 | clear_bit(STATE_SUSPENDED, &intel->flags); |
| 1041 | if (test_and_clear_bit(STATE_LPM_TRANSACTION, &intel->flags)) { |
| 1042 | smp_mb__after_atomic(); |
| 1043 | wake_up_bit(&intel->flags, STATE_LPM_TRANSACTION); |
| 1044 | } |
| 1045 | break; |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 1046 | default: |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 1047 | bt_dev_err(hdev, "Unknown LPM opcode (%02x)", lpm->opcode); |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 1048 | break; |
| 1049 | } |
| 1050 | |
| 1051 | kfree_skb(skb); |
| 1052 | |
| 1053 | return 0; |
| 1054 | } |
| 1055 | |
| 1056 | #define INTEL_RECV_LPM \ |
| 1057 | .type = HCI_LPM_PKT, \ |
| 1058 | .hlen = HCI_LPM_HDR_SIZE, \ |
| 1059 | .loff = 1, \ |
| 1060 | .lsize = 1, \ |
| 1061 | .maxlen = HCI_LPM_MAX_SIZE |
| 1062 | |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 1063 | static const struct h4_recv_pkt intel_recv_pkts[] = { |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 1064 | { H4_RECV_ACL, .recv = hci_recv_frame }, |
| 1065 | { H4_RECV_SCO, .recv = hci_recv_frame }, |
| 1066 | { H4_RECV_EVENT, .recv = intel_recv_event }, |
| 1067 | { INTEL_RECV_LPM, .recv = intel_recv_lpm }, |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 1068 | }; |
| 1069 | |
| 1070 | static int intel_recv(struct hci_uart *hu, const void *data, int count) |
| 1071 | { |
| 1072 | struct intel_data *intel = hu->priv; |
| 1073 | |
| 1074 | if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) |
| 1075 | return -EUNATCH; |
| 1076 | |
| 1077 | intel->rx_skb = h4_recv_buf(hu->hdev, intel->rx_skb, data, count, |
| 1078 | intel_recv_pkts, |
| 1079 | ARRAY_SIZE(intel_recv_pkts)); |
| 1080 | if (IS_ERR(intel->rx_skb)) { |
| 1081 | int err = PTR_ERR(intel->rx_skb); |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 1082 | bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 1083 | intel->rx_skb = NULL; |
| 1084 | return err; |
| 1085 | } |
| 1086 | |
| 1087 | return count; |
| 1088 | } |
| 1089 | |
| 1090 | static int intel_enqueue(struct hci_uart *hu, struct sk_buff *skb) |
| 1091 | { |
| 1092 | struct intel_data *intel = hu->priv; |
Loic Poulain | 74cdad3 | 2015-09-02 12:04:13 +0200 | [diff] [blame] | 1093 | struct list_head *p; |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 1094 | |
| 1095 | BT_DBG("hu %p skb %p", hu, skb); |
| 1096 | |
Loic Poulain | 74cdad3 | 2015-09-02 12:04:13 +0200 | [diff] [blame] | 1097 | /* Be sure our controller is resumed and potential LPM transaction |
| 1098 | * completed before enqueuing any packet. |
| 1099 | */ |
| 1100 | mutex_lock(&intel_device_list_lock); |
| 1101 | list_for_each(p, &intel_device_list) { |
| 1102 | struct intel_device *idev = list_entry(p, struct intel_device, |
| 1103 | list); |
| 1104 | |
| 1105 | if (hu->tty->dev->parent == idev->pdev->dev.parent) { |
| 1106 | pm_runtime_get_sync(&idev->pdev->dev); |
| 1107 | pm_runtime_mark_last_busy(&idev->pdev->dev); |
| 1108 | pm_runtime_put_autosuspend(&idev->pdev->dev); |
| 1109 | break; |
| 1110 | } |
| 1111 | } |
| 1112 | mutex_unlock(&intel_device_list_lock); |
| 1113 | |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 1114 | skb_queue_tail(&intel->txq, skb); |
| 1115 | |
| 1116 | return 0; |
| 1117 | } |
| 1118 | |
| 1119 | static struct sk_buff *intel_dequeue(struct hci_uart *hu) |
| 1120 | { |
| 1121 | struct intel_data *intel = hu->priv; |
| 1122 | struct sk_buff *skb; |
| 1123 | |
| 1124 | skb = skb_dequeue(&intel->txq); |
| 1125 | if (!skb) |
| 1126 | return skb; |
| 1127 | |
| 1128 | if (test_bit(STATE_BOOTLOADER, &intel->flags) && |
| 1129 | (bt_cb(skb)->pkt_type == HCI_COMMAND_PKT)) { |
| 1130 | struct hci_command_hdr *cmd = (void *)skb->data; |
| 1131 | __u16 opcode = le16_to_cpu(cmd->opcode); |
| 1132 | |
| 1133 | /* When the 0xfc01 command is issued to boot into |
| 1134 | * the operational firmware, it will actually not |
| 1135 | * send a command complete event. To keep the flow |
| 1136 | * control working inject that event here. |
| 1137 | */ |
| 1138 | if (opcode == 0xfc01) |
| 1139 | inject_cmd_complete(hu->hdev, opcode); |
| 1140 | } |
| 1141 | |
| 1142 | /* Prepend skb with frame type */ |
| 1143 | memcpy(skb_push(skb, 1), &bt_cb(skb)->pkt_type, 1); |
| 1144 | |
| 1145 | return skb; |
| 1146 | } |
| 1147 | |
| 1148 | static const struct hci_uart_proto intel_proto = { |
| 1149 | .id = HCI_UART_INTEL, |
| 1150 | .name = "Intel", |
Marcel Holtmann | aee61f7 | 2015-10-20 21:30:45 +0200 | [diff] [blame] | 1151 | .manufacturer = 2, |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 1152 | .init_speed = 115200, |
Loic Poulain | ff28955 | 2015-08-25 17:55:44 +0200 | [diff] [blame] | 1153 | .oper_speed = 3000000, |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 1154 | .open = intel_open, |
| 1155 | .close = intel_close, |
| 1156 | .flush = intel_flush, |
| 1157 | .setup = intel_setup, |
Loic Poulain | ff28955 | 2015-08-25 17:55:44 +0200 | [diff] [blame] | 1158 | .set_baudrate = intel_set_baudrate, |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 1159 | .recv = intel_recv, |
| 1160 | .enqueue = intel_enqueue, |
| 1161 | .dequeue = intel_dequeue, |
| 1162 | }; |
| 1163 | |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 1164 | #ifdef CONFIG_ACPI |
| 1165 | static const struct acpi_device_id intel_acpi_match[] = { |
| 1166 | { "INT33E1", 0 }, |
| 1167 | { }, |
| 1168 | }; |
| 1169 | MODULE_DEVICE_TABLE(acpi, intel_acpi_match); |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 1170 | #endif |
| 1171 | |
Loic Poulain | 74cdad3 | 2015-09-02 12:04:13 +0200 | [diff] [blame] | 1172 | #ifdef CONFIG_PM |
Loic Poulain | f755247 | 2015-09-09 21:04:15 +0200 | [diff] [blame] | 1173 | static int intel_suspend_device(struct device *dev) |
Loic Poulain | aa6802d | 2015-09-02 12:04:12 +0200 | [diff] [blame] | 1174 | { |
| 1175 | struct intel_device *idev = dev_get_drvdata(dev); |
| 1176 | |
Loic Poulain | aa6802d | 2015-09-02 12:04:12 +0200 | [diff] [blame] | 1177 | mutex_lock(&idev->hu_lock); |
| 1178 | if (idev->hu) |
| 1179 | intel_lpm_suspend(idev->hu); |
| 1180 | mutex_unlock(&idev->hu_lock); |
| 1181 | |
| 1182 | return 0; |
| 1183 | } |
| 1184 | |
Loic Poulain | f755247 | 2015-09-09 21:04:15 +0200 | [diff] [blame] | 1185 | static int intel_resume_device(struct device *dev) |
Loic Poulain | aa6802d | 2015-09-02 12:04:12 +0200 | [diff] [blame] | 1186 | { |
| 1187 | struct intel_device *idev = dev_get_drvdata(dev); |
| 1188 | |
Loic Poulain | aa6802d | 2015-09-02 12:04:12 +0200 | [diff] [blame] | 1189 | mutex_lock(&idev->hu_lock); |
| 1190 | if (idev->hu) |
| 1191 | intel_lpm_resume(idev->hu); |
| 1192 | mutex_unlock(&idev->hu_lock); |
| 1193 | |
| 1194 | return 0; |
| 1195 | } |
| 1196 | #endif |
| 1197 | |
Loic Poulain | f755247 | 2015-09-09 21:04:15 +0200 | [diff] [blame] | 1198 | #ifdef CONFIG_PM_SLEEP |
| 1199 | static int intel_suspend(struct device *dev) |
| 1200 | { |
| 1201 | struct intel_device *idev = dev_get_drvdata(dev); |
| 1202 | |
| 1203 | if (device_may_wakeup(dev)) |
| 1204 | enable_irq_wake(idev->irq); |
| 1205 | |
| 1206 | return intel_suspend_device(dev); |
| 1207 | } |
| 1208 | |
| 1209 | static int intel_resume(struct device *dev) |
| 1210 | { |
| 1211 | struct intel_device *idev = dev_get_drvdata(dev); |
| 1212 | |
| 1213 | if (device_may_wakeup(dev)) |
| 1214 | disable_irq_wake(idev->irq); |
| 1215 | |
| 1216 | return intel_resume_device(dev); |
| 1217 | } |
| 1218 | #endif |
| 1219 | |
Loic Poulain | aa6802d | 2015-09-02 12:04:12 +0200 | [diff] [blame] | 1220 | static const struct dev_pm_ops intel_pm_ops = { |
| 1221 | SET_SYSTEM_SLEEP_PM_OPS(intel_suspend, intel_resume) |
Loic Poulain | f755247 | 2015-09-09 21:04:15 +0200 | [diff] [blame] | 1222 | SET_RUNTIME_PM_OPS(intel_suspend_device, intel_resume_device, NULL) |
Loic Poulain | aa6802d | 2015-09-02 12:04:12 +0200 | [diff] [blame] | 1223 | }; |
| 1224 | |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 1225 | static int intel_probe(struct platform_device *pdev) |
| 1226 | { |
| 1227 | struct intel_device *idev; |
| 1228 | |
| 1229 | idev = devm_kzalloc(&pdev->dev, sizeof(*idev), GFP_KERNEL); |
| 1230 | if (!idev) |
| 1231 | return -ENOMEM; |
| 1232 | |
Loic Poulain | aa6802d | 2015-09-02 12:04:12 +0200 | [diff] [blame] | 1233 | mutex_init(&idev->hu_lock); |
| 1234 | |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 1235 | idev->pdev = pdev; |
| 1236 | |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 1237 | idev->reset = devm_gpiod_get_optional(&pdev->dev, "reset", |
| 1238 | GPIOD_OUT_LOW); |
| 1239 | if (IS_ERR(idev->reset)) { |
| 1240 | dev_err(&pdev->dev, "Unable to retrieve gpio\n"); |
| 1241 | return PTR_ERR(idev->reset); |
| 1242 | } |
| 1243 | |
Loic Poulain | 765ea3a | 2015-08-29 13:38:18 +0200 | [diff] [blame] | 1244 | idev->irq = platform_get_irq(pdev, 0); |
| 1245 | if (idev->irq < 0) { |
| 1246 | struct gpio_desc *host_wake; |
| 1247 | |
| 1248 | dev_err(&pdev->dev, "No IRQ, falling back to gpio-irq\n"); |
| 1249 | |
| 1250 | host_wake = devm_gpiod_get_optional(&pdev->dev, "host-wake", |
| 1251 | GPIOD_IN); |
| 1252 | if (IS_ERR(host_wake)) { |
| 1253 | dev_err(&pdev->dev, "Unable to retrieve IRQ\n"); |
| 1254 | goto no_irq; |
| 1255 | } |
| 1256 | |
| 1257 | idev->irq = gpiod_to_irq(host_wake); |
| 1258 | if (idev->irq < 0) { |
| 1259 | dev_err(&pdev->dev, "No corresponding irq for gpio\n"); |
| 1260 | goto no_irq; |
| 1261 | } |
| 1262 | } |
| 1263 | |
| 1264 | /* Only enable wake-up/irq when controller is powered */ |
| 1265 | device_set_wakeup_capable(&pdev->dev, true); |
| 1266 | device_wakeup_disable(&pdev->dev); |
| 1267 | |
| 1268 | no_irq: |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 1269 | platform_set_drvdata(pdev, idev); |
| 1270 | |
| 1271 | /* Place this instance on the device list */ |
Loic Poulain | 67c8bde | 2015-08-31 18:34:31 +0200 | [diff] [blame] | 1272 | mutex_lock(&intel_device_list_lock); |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 1273 | list_add_tail(&idev->list, &intel_device_list); |
Loic Poulain | 67c8bde | 2015-08-31 18:34:31 +0200 | [diff] [blame] | 1274 | mutex_unlock(&intel_device_list_lock); |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 1275 | |
Loic Poulain | 765ea3a | 2015-08-29 13:38:18 +0200 | [diff] [blame] | 1276 | dev_info(&pdev->dev, "registered, gpio(%d)/irq(%d).\n", |
| 1277 | desc_to_gpio(idev->reset), idev->irq); |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 1278 | |
| 1279 | return 0; |
| 1280 | } |
| 1281 | |
| 1282 | static int intel_remove(struct platform_device *pdev) |
| 1283 | { |
| 1284 | struct intel_device *idev = platform_get_drvdata(pdev); |
| 1285 | |
Loic Poulain | 765ea3a | 2015-08-29 13:38:18 +0200 | [diff] [blame] | 1286 | device_wakeup_disable(&pdev->dev); |
| 1287 | |
Loic Poulain | 67c8bde | 2015-08-31 18:34:31 +0200 | [diff] [blame] | 1288 | mutex_lock(&intel_device_list_lock); |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 1289 | list_del(&idev->list); |
Loic Poulain | 67c8bde | 2015-08-31 18:34:31 +0200 | [diff] [blame] | 1290 | mutex_unlock(&intel_device_list_lock); |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 1291 | |
| 1292 | dev_info(&pdev->dev, "unregistered.\n"); |
| 1293 | |
| 1294 | return 0; |
| 1295 | } |
| 1296 | |
| 1297 | static struct platform_driver intel_driver = { |
| 1298 | .probe = intel_probe, |
| 1299 | .remove = intel_remove, |
| 1300 | .driver = { |
| 1301 | .name = "hci_intel", |
| 1302 | .acpi_match_table = ACPI_PTR(intel_acpi_match), |
Loic Poulain | aa6802d | 2015-09-02 12:04:12 +0200 | [diff] [blame] | 1303 | .pm = &intel_pm_ops, |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 1304 | }, |
| 1305 | }; |
| 1306 | |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 1307 | int __init intel_init(void) |
| 1308 | { |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 1309 | platform_driver_register(&intel_driver); |
| 1310 | |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 1311 | return hci_uart_register_proto(&intel_proto); |
| 1312 | } |
| 1313 | |
| 1314 | int __exit intel_deinit(void) |
| 1315 | { |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 1316 | platform_driver_unregister(&intel_driver); |
| 1317 | |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 1318 | return hci_uart_unregister_proto(&intel_proto); |
| 1319 | } |