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 | |
Bart Van Assche | f0a70a0 | 2016-08-11 16:02:44 -0700 | [diff] [blame] | 131 | if (err == -EINTR) { |
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 | |
Bart Van Assche | f0a70a0 | 2016-08-11 16:02:44 -0700 | [diff] [blame] | 154 | if (err == -EINTR) { |
Loic Poulain | 8943654 | 2015-09-02 12:04:11 +0200 | [diff] [blame] | 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)); |
Marcel Holtmann | 618e8bc | 2015-11-05 07:33:56 +0100 | [diff] [blame] | 189 | hci_skb_pkt_type(skb) = HCI_LPM_PKT; |
Loic Poulain | 8943654 | 2015-09-02 12:04:11 +0200 | [diff] [blame] | 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 | |
Marcel Holtmann | 618e8bc | 2015-11-05 07:33:56 +0100 | [diff] [blame] | 233 | hci_skb_pkt_type(skb) = HCI_LPM_WAKE_PKT; |
Loic Poulain | 8943654 | 2015-09-02 12:04:11 +0200 | [diff] [blame] | 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)); |
Marcel Holtmann | 618e8bc | 2015-11-05 07:33:56 +0100 | [diff] [blame] | 275 | hci_skb_pkt_type(skb) = HCI_LPM_PKT; |
Loic Poulain | 8943654 | 2015-09-02 12:04:11 +0200 | [diff] [blame] | 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 | |
Johan Hovold | 6e7de39 | 2017-03-29 18:15:28 +0200 | [diff] [blame] | 310 | if (!hu->tty->dev) |
| 311 | return err; |
| 312 | |
Loic Poulain | 67c8bde | 2015-08-31 18:34:31 +0200 | [diff] [blame] | 313 | mutex_lock(&intel_device_list_lock); |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 314 | |
| 315 | list_for_each(p, &intel_device_list) { |
| 316 | struct intel_device *idev = list_entry(p, struct intel_device, |
| 317 | list); |
| 318 | |
| 319 | /* tty device and pdev device should share the same parent |
| 320 | * which is the UART port. |
| 321 | */ |
| 322 | if (hu->tty->dev->parent != idev->pdev->dev.parent) |
| 323 | continue; |
| 324 | |
| 325 | if (!idev->reset) { |
| 326 | err = -ENOTSUPP; |
| 327 | break; |
| 328 | } |
| 329 | |
| 330 | BT_INFO("hu %p, Switching compatible pm device (%s) to %u", |
| 331 | hu, dev_name(&idev->pdev->dev), powered); |
| 332 | |
| 333 | gpiod_set_value(idev->reset, powered); |
Loic Poulain | 765ea3a | 2015-08-29 13:38:18 +0200 | [diff] [blame] | 334 | |
Loic Poulain | aa6802d | 2015-09-02 12:04:12 +0200 | [diff] [blame] | 335 | /* Provide to idev a hu reference which is used to run LPM |
| 336 | * transactions (lpm suspend/resume) from PM callbacks. |
| 337 | * hu needs to be protected against concurrent removing during |
| 338 | * these PM ops. |
| 339 | */ |
| 340 | mutex_lock(&idev->hu_lock); |
| 341 | idev->hu = powered ? hu : NULL; |
| 342 | mutex_unlock(&idev->hu_lock); |
| 343 | |
Loic Poulain | 765ea3a | 2015-08-29 13:38:18 +0200 | [diff] [blame] | 344 | if (idev->irq < 0) |
| 345 | break; |
| 346 | |
| 347 | if (powered && device_can_wakeup(&idev->pdev->dev)) { |
| 348 | err = devm_request_threaded_irq(&idev->pdev->dev, |
| 349 | idev->irq, NULL, |
| 350 | intel_irq, |
| 351 | IRQF_ONESHOT, |
| 352 | "bt-host-wake", idev); |
| 353 | if (err) { |
| 354 | BT_ERR("hu %p, unable to allocate irq-%d", |
| 355 | hu, idev->irq); |
| 356 | break; |
| 357 | } |
| 358 | |
| 359 | device_wakeup_enable(&idev->pdev->dev); |
Loic Poulain | 74cdad3 | 2015-09-02 12:04:13 +0200 | [diff] [blame] | 360 | |
| 361 | pm_runtime_set_active(&idev->pdev->dev); |
| 362 | pm_runtime_use_autosuspend(&idev->pdev->dev); |
| 363 | pm_runtime_set_autosuspend_delay(&idev->pdev->dev, |
| 364 | LPM_SUSPEND_DELAY_MS); |
| 365 | pm_runtime_enable(&idev->pdev->dev); |
Loic Poulain | 765ea3a | 2015-08-29 13:38:18 +0200 | [diff] [blame] | 366 | } else if (!powered && device_may_wakeup(&idev->pdev->dev)) { |
| 367 | devm_free_irq(&idev->pdev->dev, idev->irq, idev); |
| 368 | device_wakeup_disable(&idev->pdev->dev); |
Loic Poulain | 74cdad3 | 2015-09-02 12:04:13 +0200 | [diff] [blame] | 369 | |
| 370 | pm_runtime_disable(&idev->pdev->dev); |
Loic Poulain | 765ea3a | 2015-08-29 13:38:18 +0200 | [diff] [blame] | 371 | } |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 372 | } |
| 373 | |
Loic Poulain | 67c8bde | 2015-08-31 18:34:31 +0200 | [diff] [blame] | 374 | mutex_unlock(&intel_device_list_lock); |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 375 | |
| 376 | return err; |
| 377 | } |
| 378 | |
Loic Poulain | 74cdad3 | 2015-09-02 12:04:13 +0200 | [diff] [blame] | 379 | static void intel_busy_work(struct work_struct *work) |
| 380 | { |
| 381 | struct list_head *p; |
| 382 | struct intel_data *intel = container_of(work, struct intel_data, |
| 383 | busy_work); |
| 384 | |
Johan Hovold | 6e7de39 | 2017-03-29 18:15:28 +0200 | [diff] [blame] | 385 | if (!intel->hu->tty->dev) |
| 386 | return; |
| 387 | |
Loic Poulain | 74cdad3 | 2015-09-02 12:04:13 +0200 | [diff] [blame] | 388 | /* Link is busy, delay the suspend */ |
| 389 | mutex_lock(&intel_device_list_lock); |
| 390 | list_for_each(p, &intel_device_list) { |
| 391 | struct intel_device *idev = list_entry(p, struct intel_device, |
| 392 | list); |
| 393 | |
| 394 | if (intel->hu->tty->dev->parent == idev->pdev->dev.parent) { |
| 395 | pm_runtime_get(&idev->pdev->dev); |
| 396 | pm_runtime_mark_last_busy(&idev->pdev->dev); |
| 397 | pm_runtime_put_autosuspend(&idev->pdev->dev); |
| 398 | break; |
| 399 | } |
| 400 | } |
| 401 | mutex_unlock(&intel_device_list_lock); |
| 402 | } |
| 403 | |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 404 | static int intel_open(struct hci_uart *hu) |
| 405 | { |
| 406 | struct intel_data *intel; |
| 407 | |
| 408 | BT_DBG("hu %p", hu); |
| 409 | |
| 410 | intel = kzalloc(sizeof(*intel), GFP_KERNEL); |
| 411 | if (!intel) |
| 412 | return -ENOMEM; |
| 413 | |
| 414 | skb_queue_head_init(&intel->txq); |
Loic Poulain | 74cdad3 | 2015-09-02 12:04:13 +0200 | [diff] [blame] | 415 | INIT_WORK(&intel->busy_work, intel_busy_work); |
| 416 | |
| 417 | intel->hu = hu; |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 418 | |
| 419 | hu->priv = intel; |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 420 | |
| 421 | if (!intel_set_power(hu, true)) |
| 422 | set_bit(STATE_BOOTING, &intel->flags); |
| 423 | |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 424 | return 0; |
| 425 | } |
| 426 | |
| 427 | static int intel_close(struct hci_uart *hu) |
| 428 | { |
| 429 | struct intel_data *intel = hu->priv; |
| 430 | |
| 431 | BT_DBG("hu %p", hu); |
| 432 | |
Loic Poulain | 74cdad3 | 2015-09-02 12:04:13 +0200 | [diff] [blame] | 433 | cancel_work_sync(&intel->busy_work); |
| 434 | |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 435 | intel_set_power(hu, false); |
| 436 | |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 437 | skb_queue_purge(&intel->txq); |
| 438 | kfree_skb(intel->rx_skb); |
| 439 | kfree(intel); |
| 440 | |
| 441 | hu->priv = NULL; |
| 442 | return 0; |
| 443 | } |
| 444 | |
| 445 | static int intel_flush(struct hci_uart *hu) |
| 446 | { |
| 447 | struct intel_data *intel = hu->priv; |
| 448 | |
| 449 | BT_DBG("hu %p", hu); |
| 450 | |
| 451 | skb_queue_purge(&intel->txq); |
| 452 | |
| 453 | return 0; |
| 454 | } |
| 455 | |
| 456 | static int inject_cmd_complete(struct hci_dev *hdev, __u16 opcode) |
| 457 | { |
| 458 | struct sk_buff *skb; |
| 459 | struct hci_event_hdr *hdr; |
| 460 | struct hci_ev_cmd_complete *evt; |
| 461 | |
| 462 | skb = bt_skb_alloc(sizeof(*hdr) + sizeof(*evt) + 1, GFP_ATOMIC); |
| 463 | if (!skb) |
| 464 | return -ENOMEM; |
| 465 | |
| 466 | hdr = (struct hci_event_hdr *)skb_put(skb, sizeof(*hdr)); |
| 467 | hdr->evt = HCI_EV_CMD_COMPLETE; |
| 468 | hdr->plen = sizeof(*evt) + 1; |
| 469 | |
| 470 | evt = (struct hci_ev_cmd_complete *)skb_put(skb, sizeof(*evt)); |
| 471 | evt->ncmd = 0x01; |
| 472 | evt->opcode = cpu_to_le16(opcode); |
| 473 | |
| 474 | *skb_put(skb, 1) = 0x00; |
| 475 | |
Marcel Holtmann | 618e8bc | 2015-11-05 07:33:56 +0100 | [diff] [blame] | 476 | hci_skb_pkt_type(skb) = HCI_EVENT_PKT; |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 477 | |
| 478 | return hci_recv_frame(hdev, skb); |
| 479 | } |
| 480 | |
Loic Poulain | ff28955 | 2015-08-25 17:55:44 +0200 | [diff] [blame] | 481 | static int intel_set_baudrate(struct hci_uart *hu, unsigned int speed) |
| 482 | { |
| 483 | struct intel_data *intel = hu->priv; |
| 484 | struct hci_dev *hdev = hu->hdev; |
| 485 | u8 speed_cmd[] = { 0x06, 0xfc, 0x01, 0x00 }; |
| 486 | struct sk_buff *skb; |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 487 | int err; |
| 488 | |
| 489 | /* This can be the first command sent to the chip, check |
| 490 | * that the controller is ready. |
| 491 | */ |
| 492 | err = intel_wait_booting(hu); |
| 493 | |
| 494 | clear_bit(STATE_BOOTING, &intel->flags); |
| 495 | |
| 496 | /* In case of timeout, try to continue anyway */ |
Anton Protopopov | 2be1149 | 2016-02-10 12:22:54 -0500 | [diff] [blame] | 497 | if (err && err != -ETIMEDOUT) |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 498 | return err; |
Loic Poulain | ff28955 | 2015-08-25 17:55:44 +0200 | [diff] [blame] | 499 | |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 500 | bt_dev_info(hdev, "Change controller speed to %d", speed); |
Loic Poulain | ff28955 | 2015-08-25 17:55:44 +0200 | [diff] [blame] | 501 | |
| 502 | speed_cmd[3] = intel_convert_speed(speed); |
| 503 | if (speed_cmd[3] == 0xff) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 504 | bt_dev_err(hdev, "Unsupported speed"); |
Loic Poulain | ff28955 | 2015-08-25 17:55:44 +0200 | [diff] [blame] | 505 | return -EINVAL; |
| 506 | } |
| 507 | |
| 508 | /* Device will not accept speed change if Intel version has not been |
| 509 | * previously requested. |
| 510 | */ |
Loic Poulain | a0c3824 | 2015-11-27 19:55:59 +0100 | [diff] [blame] | 511 | skb = __hci_cmd_sync(hdev, 0xfc05, 0, NULL, HCI_CMD_TIMEOUT); |
Loic Poulain | ff28955 | 2015-08-25 17:55:44 +0200 | [diff] [blame] | 512 | if (IS_ERR(skb)) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 513 | bt_dev_err(hdev, "Reading Intel version information failed (%ld)", |
| 514 | PTR_ERR(skb)); |
Loic Poulain | ff28955 | 2015-08-25 17:55:44 +0200 | [diff] [blame] | 515 | return PTR_ERR(skb); |
| 516 | } |
| 517 | kfree_skb(skb); |
| 518 | |
| 519 | skb = bt_skb_alloc(sizeof(speed_cmd), GFP_KERNEL); |
| 520 | if (!skb) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 521 | bt_dev_err(hdev, "Failed to alloc memory for baudrate packet"); |
Loic Poulain | ff28955 | 2015-08-25 17:55:44 +0200 | [diff] [blame] | 522 | return -ENOMEM; |
| 523 | } |
| 524 | |
| 525 | memcpy(skb_put(skb, sizeof(speed_cmd)), speed_cmd, sizeof(speed_cmd)); |
Marcel Holtmann | 618e8bc | 2015-11-05 07:33:56 +0100 | [diff] [blame] | 526 | hci_skb_pkt_type(skb) = HCI_COMMAND_PKT; |
Loic Poulain | ff28955 | 2015-08-25 17:55:44 +0200 | [diff] [blame] | 527 | |
| 528 | hci_uart_set_flow_control(hu, true); |
| 529 | |
| 530 | skb_queue_tail(&intel->txq, skb); |
| 531 | hci_uart_tx_wakeup(hu); |
| 532 | |
| 533 | /* wait 100ms to change baudrate on controller side */ |
| 534 | msleep(100); |
| 535 | |
| 536 | hci_uart_set_baudrate(hu, speed); |
| 537 | hci_uart_set_flow_control(hu, false); |
| 538 | |
| 539 | return 0; |
| 540 | } |
| 541 | |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 542 | static int intel_setup(struct hci_uart *hu) |
| 543 | { |
| 544 | static const u8 reset_param[] = { 0x00, 0x01, 0x00, 0x01, |
| 545 | 0x00, 0x08, 0x04, 0x00 }; |
| 546 | struct intel_data *intel = hu->priv; |
| 547 | struct hci_dev *hdev = hu->hdev; |
| 548 | struct sk_buff *skb; |
Loic Poulain | 6c483de | 2015-12-06 16:18:34 +0100 | [diff] [blame] | 549 | struct intel_version ver; |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 550 | struct intel_boot_params *params; |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 551 | struct list_head *p; |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 552 | const struct firmware *fw; |
| 553 | const u8 *fw_ptr; |
| 554 | char fwname[64]; |
| 555 | u32 frag_len; |
| 556 | ktime_t calltime, delta, rettime; |
| 557 | unsigned long long duration; |
Loic Poulain | ff28955 | 2015-08-25 17:55:44 +0200 | [diff] [blame] | 558 | unsigned int init_speed, oper_speed; |
| 559 | int speed_change = 0; |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 560 | int err; |
| 561 | |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 562 | bt_dev_dbg(hdev, "start intel_setup"); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 563 | |
Marcel Holtmann | 6d2e50d | 2015-10-09 14:42:08 +0200 | [diff] [blame] | 564 | hu->hdev->set_diag = btintel_set_diag; |
Marcel Holtmann | 35ab815 | 2015-07-05 14:37:40 +0200 | [diff] [blame] | 565 | hu->hdev->set_bdaddr = btintel_set_bdaddr; |
| 566 | |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 567 | calltime = ktime_get(); |
| 568 | |
Loic Poulain | ff28955 | 2015-08-25 17:55:44 +0200 | [diff] [blame] | 569 | if (hu->init_speed) |
| 570 | init_speed = hu->init_speed; |
| 571 | else |
| 572 | init_speed = hu->proto->init_speed; |
| 573 | |
| 574 | if (hu->oper_speed) |
| 575 | oper_speed = hu->oper_speed; |
| 576 | else |
| 577 | oper_speed = hu->proto->oper_speed; |
| 578 | |
| 579 | if (oper_speed && init_speed && oper_speed != init_speed) |
| 580 | speed_change = 1; |
| 581 | |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 582 | /* Check that the controller is ready */ |
| 583 | err = intel_wait_booting(hu); |
| 584 | |
| 585 | clear_bit(STATE_BOOTING, &intel->flags); |
| 586 | |
| 587 | /* In case of timeout, try to continue anyway */ |
Anton Protopopov | 2be1149 | 2016-02-10 12:22:54 -0500 | [diff] [blame] | 588 | if (err && err != -ETIMEDOUT) |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 589 | return err; |
| 590 | |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 591 | set_bit(STATE_BOOTLOADER, &intel->flags); |
| 592 | |
| 593 | /* Read the Intel version information to determine if the device |
| 594 | * is in bootloader mode or if it already has operational firmware |
| 595 | * loaded. |
| 596 | */ |
Loic Poulain | 6c483de | 2015-12-06 16:18:34 +0100 | [diff] [blame] | 597 | err = btintel_read_version(hdev, &ver); |
| 598 | if (err) |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 599 | return err; |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 600 | |
| 601 | /* The hardware platform number has a fixed value of 0x37 and |
| 602 | * for now only accept this single value. |
| 603 | */ |
Loic Poulain | 6c483de | 2015-12-06 16:18:34 +0100 | [diff] [blame] | 604 | if (ver.hw_platform != 0x37) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 605 | bt_dev_err(hdev, "Unsupported Intel hardware platform (%u)", |
Loic Poulain | 6c483de | 2015-12-06 16:18:34 +0100 | [diff] [blame] | 606 | ver.hw_platform); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 607 | return -EINVAL; |
| 608 | } |
| 609 | |
| 610 | /* At the moment only the hardware variant iBT 3.0 (LnP/SfP) is |
| 611 | * supported by this firmware loading method. This check has been |
| 612 | * put in place to ensure correct forward compatibility options |
| 613 | * when newer hardware variants come along. |
| 614 | */ |
Loic Poulain | 6c483de | 2015-12-06 16:18:34 +0100 | [diff] [blame] | 615 | if (ver.hw_variant != 0x0b) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 616 | bt_dev_err(hdev, "Unsupported Intel hardware variant (%u)", |
Loic Poulain | 6c483de | 2015-12-06 16:18:34 +0100 | [diff] [blame] | 617 | ver.hw_variant); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 618 | return -EINVAL; |
| 619 | } |
| 620 | |
Loic Poulain | 6c483de | 2015-12-06 16:18:34 +0100 | [diff] [blame] | 621 | btintel_version_info(hdev, &ver); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 622 | |
| 623 | /* The firmware variant determines if the device is in bootloader |
| 624 | * mode or is running operational firmware. The value 0x06 identifies |
| 625 | * the bootloader and the value 0x23 identifies the operational |
| 626 | * firmware. |
| 627 | * |
| 628 | * When the operational firmware is already present, then only |
| 629 | * the check for valid Bluetooth device address is needed. This |
| 630 | * determines if the device will be added as configured or |
| 631 | * unconfigured controller. |
| 632 | * |
| 633 | * It is not possible to use the Secure Boot Parameters in this |
| 634 | * case since that command is only available in bootloader mode. |
| 635 | */ |
Loic Poulain | 6c483de | 2015-12-06 16:18:34 +0100 | [diff] [blame] | 636 | if (ver.fw_variant == 0x23) { |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 637 | clear_bit(STATE_BOOTLOADER, &intel->flags); |
| 638 | btintel_check_bdaddr(hdev); |
| 639 | return 0; |
| 640 | } |
| 641 | |
| 642 | /* If the device is not in bootloader mode, then the only possible |
| 643 | * choice is to return an error and abort the device initialization. |
| 644 | */ |
Loic Poulain | 6c483de | 2015-12-06 16:18:34 +0100 | [diff] [blame] | 645 | if (ver.fw_variant != 0x06) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 646 | bt_dev_err(hdev, "Unsupported Intel firmware variant (%u)", |
Loic Poulain | 6c483de | 2015-12-06 16:18:34 +0100 | [diff] [blame] | 647 | ver.fw_variant); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 648 | return -ENODEV; |
| 649 | } |
| 650 | |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 651 | /* Read the secure boot parameters to identify the operating |
| 652 | * details of the bootloader. |
| 653 | */ |
Loic Poulain | a0c3824 | 2015-11-27 19:55:59 +0100 | [diff] [blame] | 654 | skb = __hci_cmd_sync(hdev, 0xfc0d, 0, NULL, HCI_CMD_TIMEOUT); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 655 | if (IS_ERR(skb)) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 656 | bt_dev_err(hdev, "Reading Intel boot parameters failed (%ld)", |
| 657 | PTR_ERR(skb)); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 658 | return PTR_ERR(skb); |
| 659 | } |
| 660 | |
| 661 | if (skb->len != sizeof(*params)) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 662 | bt_dev_err(hdev, "Intel boot parameters size mismatch"); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 663 | kfree_skb(skb); |
| 664 | return -EILSEQ; |
| 665 | } |
| 666 | |
| 667 | params = (struct intel_boot_params *)skb->data; |
| 668 | if (params->status) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 669 | bt_dev_err(hdev, "Intel boot parameters command failure (%02x)", |
| 670 | params->status); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 671 | err = -bt_to_errno(params->status); |
| 672 | kfree_skb(skb); |
| 673 | return err; |
| 674 | } |
| 675 | |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 676 | bt_dev_info(hdev, "Device revision is %u", |
| 677 | le16_to_cpu(params->dev_revid)); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 678 | |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 679 | bt_dev_info(hdev, "Secure boot is %s", |
| 680 | params->secure_boot ? "enabled" : "disabled"); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 681 | |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 682 | bt_dev_info(hdev, "Minimum firmware build %u week %u %u", |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 683 | params->min_fw_build_nn, params->min_fw_build_cw, |
| 684 | 2000 + params->min_fw_build_yy); |
| 685 | |
| 686 | /* It is required that every single firmware fragment is acknowledged |
| 687 | * with a command complete event. If the boot parameters indicate |
| 688 | * that this bootloader does not send them, then abort the setup. |
| 689 | */ |
| 690 | if (params->limited_cce != 0x00) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 691 | bt_dev_err(hdev, "Unsupported Intel firmware loading method (%u)", |
| 692 | params->limited_cce); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 693 | kfree_skb(skb); |
| 694 | return -EINVAL; |
| 695 | } |
| 696 | |
| 697 | /* If the OTP has no valid Bluetooth device address, then there will |
| 698 | * also be no valid address for the operational firmware. |
| 699 | */ |
| 700 | if (!bacmp(¶ms->otp_bdaddr, BDADDR_ANY)) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 701 | bt_dev_info(hdev, "No device address configured"); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 702 | set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks); |
| 703 | } |
| 704 | |
| 705 | /* With this Intel bootloader only the hardware variant and device |
| 706 | * revision information are used to select the right firmware. |
| 707 | * |
| 708 | * Currently this bootloader support is limited to hardware variant |
| 709 | * iBT 3.0 (LnP/SfP) which is identified by the value 11 (0x0b). |
| 710 | */ |
| 711 | snprintf(fwname, sizeof(fwname), "intel/ibt-11-%u.sfi", |
| 712 | le16_to_cpu(params->dev_revid)); |
| 713 | |
| 714 | err = request_firmware(&fw, fwname, &hdev->dev); |
| 715 | if (err < 0) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 716 | bt_dev_err(hdev, "Failed to load Intel firmware file (%d)", |
| 717 | err); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 718 | kfree_skb(skb); |
| 719 | return err; |
| 720 | } |
| 721 | |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 722 | bt_dev_info(hdev, "Found device firmware: %s", fwname); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 723 | |
Loic Poulain | 1cfbabd | 2015-09-04 17:54:35 +0200 | [diff] [blame] | 724 | /* Save the DDC file name for later */ |
| 725 | snprintf(fwname, sizeof(fwname), "intel/ibt-11-%u.ddc", |
| 726 | le16_to_cpu(params->dev_revid)); |
| 727 | |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 728 | kfree_skb(skb); |
| 729 | |
| 730 | if (fw->size < 644) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 731 | bt_dev_err(hdev, "Invalid size of firmware file (%zu)", |
| 732 | fw->size); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 733 | err = -EBADF; |
| 734 | goto done; |
| 735 | } |
| 736 | |
| 737 | set_bit(STATE_DOWNLOADING, &intel->flags); |
| 738 | |
| 739 | /* Start the firmware download transaction with the Init fragment |
| 740 | * represented by the 128 bytes of CSS header. |
| 741 | */ |
Marcel Holtmann | 09df123 | 2015-07-05 14:55:36 +0200 | [diff] [blame] | 742 | err = btintel_secure_send(hdev, 0x00, 128, fw->data); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 743 | if (err < 0) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 744 | bt_dev_err(hdev, "Failed to send firmware header (%d)", err); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 745 | goto done; |
| 746 | } |
| 747 | |
| 748 | /* Send the 256 bytes of public key information from the firmware |
| 749 | * as the PKey fragment. |
| 750 | */ |
Marcel Holtmann | 09df123 | 2015-07-05 14:55:36 +0200 | [diff] [blame] | 751 | err = btintel_secure_send(hdev, 0x03, 256, fw->data + 128); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 752 | if (err < 0) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 753 | bt_dev_err(hdev, "Failed to send firmware public key (%d)", |
| 754 | err); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 755 | goto done; |
| 756 | } |
| 757 | |
| 758 | /* Send the 256 bytes of signature information from the firmware |
| 759 | * as the Sign fragment. |
| 760 | */ |
Marcel Holtmann | 09df123 | 2015-07-05 14:55:36 +0200 | [diff] [blame] | 761 | err = btintel_secure_send(hdev, 0x02, 256, fw->data + 388); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 762 | if (err < 0) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 763 | bt_dev_err(hdev, "Failed to send firmware signature (%d)", |
| 764 | err); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 765 | goto done; |
| 766 | } |
| 767 | |
| 768 | fw_ptr = fw->data + 644; |
| 769 | frag_len = 0; |
| 770 | |
| 771 | while (fw_ptr - fw->data < fw->size) { |
| 772 | struct hci_command_hdr *cmd = (void *)(fw_ptr + frag_len); |
| 773 | |
| 774 | frag_len += sizeof(*cmd) + cmd->plen; |
| 775 | |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 776 | bt_dev_dbg(hdev, "Patching %td/%zu", (fw_ptr - fw->data), |
| 777 | fw->size); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 778 | |
| 779 | /* The parameter length of the secure send command requires |
| 780 | * a 4 byte alignment. It happens so that the firmware file |
| 781 | * contains proper Intel_NOP commands to align the fragments |
| 782 | * as needed. |
| 783 | * |
| 784 | * Send set of commands with 4 byte alignment from the |
| 785 | * firmware data buffer as a single Data fragement. |
| 786 | */ |
| 787 | if (frag_len % 4) |
| 788 | continue; |
| 789 | |
| 790 | /* Send each command from the firmware data buffer as |
| 791 | * a single Data fragment. |
| 792 | */ |
Marcel Holtmann | 09df123 | 2015-07-05 14:55:36 +0200 | [diff] [blame] | 793 | err = btintel_secure_send(hdev, 0x01, frag_len, fw_ptr); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 794 | if (err < 0) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 795 | bt_dev_err(hdev, "Failed to send firmware data (%d)", |
| 796 | err); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 797 | goto done; |
| 798 | } |
| 799 | |
| 800 | fw_ptr += frag_len; |
| 801 | frag_len = 0; |
| 802 | } |
| 803 | |
| 804 | set_bit(STATE_FIRMWARE_LOADED, &intel->flags); |
| 805 | |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 806 | bt_dev_info(hdev, "Waiting for firmware download to complete"); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 807 | |
| 808 | /* Before switching the device into operational mode and with that |
| 809 | * booting the loaded firmware, wait for the bootloader notification |
| 810 | * that all fragments have been successfully received. |
| 811 | * |
| 812 | * When the event processing receives the notification, then the |
| 813 | * STATE_DOWNLOADING flag will be cleared. |
| 814 | * |
| 815 | * The firmware loading should not take longer than 5 seconds |
| 816 | * and thus just timeout if that happens and fail the setup |
| 817 | * of this device. |
| 818 | */ |
| 819 | err = wait_on_bit_timeout(&intel->flags, STATE_DOWNLOADING, |
| 820 | TASK_INTERRUPTIBLE, |
| 821 | msecs_to_jiffies(5000)); |
Bart Van Assche | f0a70a0 | 2016-08-11 16:02:44 -0700 | [diff] [blame] | 822 | if (err == -EINTR) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 823 | bt_dev_err(hdev, "Firmware loading interrupted"); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 824 | err = -EINTR; |
| 825 | goto done; |
| 826 | } |
| 827 | |
| 828 | if (err) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 829 | bt_dev_err(hdev, "Firmware loading timeout"); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 830 | err = -ETIMEDOUT; |
| 831 | goto done; |
| 832 | } |
| 833 | |
| 834 | if (test_bit(STATE_FIRMWARE_FAILED, &intel->flags)) { |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 835 | bt_dev_err(hdev, "Firmware loading failed"); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 836 | err = -ENOEXEC; |
| 837 | goto done; |
| 838 | } |
| 839 | |
| 840 | rettime = ktime_get(); |
| 841 | delta = ktime_sub(rettime, calltime); |
| 842 | duration = (unsigned long long) ktime_to_ns(delta) >> 10; |
| 843 | |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 844 | bt_dev_info(hdev, "Firmware loaded in %llu usecs", duration); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 845 | |
| 846 | done: |
| 847 | release_firmware(fw); |
| 848 | |
| 849 | if (err < 0) |
| 850 | return err; |
| 851 | |
Loic Poulain | ff28955 | 2015-08-25 17:55:44 +0200 | [diff] [blame] | 852 | /* We need to restore the default speed before Intel reset */ |
| 853 | if (speed_change) { |
| 854 | err = intel_set_baudrate(hu, init_speed); |
| 855 | if (err) |
| 856 | return err; |
| 857 | } |
| 858 | |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 859 | calltime = ktime_get(); |
| 860 | |
| 861 | set_bit(STATE_BOOTING, &intel->flags); |
| 862 | |
| 863 | skb = __hci_cmd_sync(hdev, 0xfc01, sizeof(reset_param), reset_param, |
Loic Poulain | a0c3824 | 2015-11-27 19:55:59 +0100 | [diff] [blame] | 864 | HCI_CMD_TIMEOUT); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 865 | if (IS_ERR(skb)) |
| 866 | return PTR_ERR(skb); |
| 867 | |
| 868 | kfree_skb(skb); |
| 869 | |
| 870 | /* The bootloader will not indicate when the device is ready. This |
| 871 | * is done by the operational firmware sending bootup notification. |
| 872 | * |
| 873 | * Booting into operational firmware should not take longer than |
| 874 | * 1 second. However if that happens, then just fail the setup |
| 875 | * since something went wrong. |
| 876 | */ |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 877 | bt_dev_info(hdev, "Waiting for device to boot"); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 878 | |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 879 | err = intel_wait_booting(hu); |
| 880 | if (err) |
| 881 | return err; |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 882 | |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 883 | clear_bit(STATE_BOOTING, &intel->flags); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 884 | |
| 885 | rettime = ktime_get(); |
| 886 | delta = ktime_sub(rettime, calltime); |
| 887 | duration = (unsigned long long) ktime_to_ns(delta) >> 10; |
| 888 | |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 889 | bt_dev_info(hdev, "Device booted in %llu usecs", duration); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 890 | |
Loic Poulain | 31eff26 | 2016-07-11 21:55:36 +0200 | [diff] [blame] | 891 | /* Enable LPM if matching pdev with wakeup enabled, set TX active |
| 892 | * until further LPM TX notification. |
| 893 | */ |
Loic Poulain | 67c8bde | 2015-08-31 18:34:31 +0200 | [diff] [blame] | 894 | mutex_lock(&intel_device_list_lock); |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 895 | list_for_each(p, &intel_device_list) { |
| 896 | struct intel_device *dev = list_entry(p, struct intel_device, |
| 897 | list); |
Johan Hovold | 6e7de39 | 2017-03-29 18:15:28 +0200 | [diff] [blame] | 898 | if (!hu->tty->dev) |
| 899 | break; |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 900 | if (hu->tty->dev->parent == dev->pdev->dev.parent) { |
Loic Poulain | 31eff26 | 2016-07-11 21:55:36 +0200 | [diff] [blame] | 901 | if (device_may_wakeup(&dev->pdev->dev)) { |
| 902 | set_bit(STATE_LPM_ENABLED, &intel->flags); |
| 903 | set_bit(STATE_TX_ACTIVE, &intel->flags); |
| 904 | } |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 905 | break; |
| 906 | } |
| 907 | } |
Loic Poulain | 67c8bde | 2015-08-31 18:34:31 +0200 | [diff] [blame] | 908 | mutex_unlock(&intel_device_list_lock); |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 909 | |
Loic Poulain | 1cfbabd | 2015-09-04 17:54:35 +0200 | [diff] [blame] | 910 | /* Ignore errors, device can work without DDC parameters */ |
| 911 | btintel_load_ddc_config(hdev, fwname); |
| 912 | |
Loic Poulain | ff28955 | 2015-08-25 17:55:44 +0200 | [diff] [blame] | 913 | skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_CMD_TIMEOUT); |
| 914 | if (IS_ERR(skb)) |
| 915 | return PTR_ERR(skb); |
| 916 | kfree_skb(skb); |
| 917 | |
| 918 | if (speed_change) { |
| 919 | err = intel_set_baudrate(hu, oper_speed); |
| 920 | if (err) |
| 921 | return err; |
| 922 | } |
| 923 | |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 924 | bt_dev_info(hdev, "Setup complete"); |
Loic Poulain | ff28955 | 2015-08-25 17:55:44 +0200 | [diff] [blame] | 925 | |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 926 | clear_bit(STATE_BOOTLOADER, &intel->flags); |
| 927 | |
| 928 | return 0; |
| 929 | } |
| 930 | |
| 931 | static int intel_recv_event(struct hci_dev *hdev, struct sk_buff *skb) |
| 932 | { |
| 933 | struct hci_uart *hu = hci_get_drvdata(hdev); |
| 934 | struct intel_data *intel = hu->priv; |
| 935 | struct hci_event_hdr *hdr; |
| 936 | |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 937 | if (!test_bit(STATE_BOOTLOADER, &intel->flags) && |
| 938 | !test_bit(STATE_BOOTING, &intel->flags)) |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 939 | goto recv; |
| 940 | |
| 941 | hdr = (void *)skb->data; |
| 942 | |
| 943 | /* When the firmware loading completes the device sends |
| 944 | * out a vendor specific event indicating the result of |
| 945 | * the firmware loading. |
| 946 | */ |
| 947 | if (skb->len == 7 && hdr->evt == 0xff && hdr->plen == 0x05 && |
| 948 | skb->data[2] == 0x06) { |
| 949 | if (skb->data[3] != 0x00) |
| 950 | set_bit(STATE_FIRMWARE_FAILED, &intel->flags); |
| 951 | |
| 952 | if (test_and_clear_bit(STATE_DOWNLOADING, &intel->flags) && |
| 953 | test_bit(STATE_FIRMWARE_LOADED, &intel->flags)) { |
| 954 | smp_mb__after_atomic(); |
| 955 | wake_up_bit(&intel->flags, STATE_DOWNLOADING); |
| 956 | } |
| 957 | |
| 958 | /* When switching to the operational firmware the device |
| 959 | * sends a vendor specific event indicating that the bootup |
| 960 | * completed. |
| 961 | */ |
| 962 | } else if (skb->len == 9 && hdr->evt == 0xff && hdr->plen == 0x07 && |
| 963 | skb->data[2] == 0x02) { |
| 964 | if (test_and_clear_bit(STATE_BOOTING, &intel->flags)) { |
| 965 | smp_mb__after_atomic(); |
| 966 | wake_up_bit(&intel->flags, STATE_BOOTING); |
| 967 | } |
| 968 | } |
| 969 | recv: |
| 970 | return hci_recv_frame(hdev, skb); |
| 971 | } |
| 972 | |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 973 | static void intel_recv_lpm_notify(struct hci_dev *hdev, int value) |
| 974 | { |
| 975 | struct hci_uart *hu = hci_get_drvdata(hdev); |
| 976 | struct intel_data *intel = hu->priv; |
| 977 | |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 978 | bt_dev_dbg(hdev, "TX idle notification (%d)", value); |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 979 | |
Loic Poulain | 74cdad3 | 2015-09-02 12:04:13 +0200 | [diff] [blame] | 980 | if (value) { |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 981 | set_bit(STATE_TX_ACTIVE, &intel->flags); |
Loic Poulain | 74cdad3 | 2015-09-02 12:04:13 +0200 | [diff] [blame] | 982 | schedule_work(&intel->busy_work); |
| 983 | } else { |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 984 | clear_bit(STATE_TX_ACTIVE, &intel->flags); |
Loic Poulain | 74cdad3 | 2015-09-02 12:04:13 +0200 | [diff] [blame] | 985 | } |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 986 | } |
| 987 | |
| 988 | static int intel_recv_lpm(struct hci_dev *hdev, struct sk_buff *skb) |
| 989 | { |
| 990 | struct hci_lpm_pkt *lpm = (void *)skb->data; |
Loic Poulain | 8943654 | 2015-09-02 12:04:11 +0200 | [diff] [blame] | 991 | struct hci_uart *hu = hci_get_drvdata(hdev); |
| 992 | struct intel_data *intel = hu->priv; |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 993 | |
| 994 | switch (lpm->opcode) { |
| 995 | case LPM_OP_TX_NOTIFY: |
Loic Poulain | 1b19757 | 2015-09-02 12:04:14 +0200 | [diff] [blame] | 996 | if (lpm->dlen < 1) { |
| 997 | bt_dev_err(hu->hdev, "Invalid LPM notification packet"); |
| 998 | break; |
| 999 | } |
| 1000 | intel_recv_lpm_notify(hdev, lpm->data[0]); |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 1001 | break; |
Loic Poulain | 8943654 | 2015-09-02 12:04:11 +0200 | [diff] [blame] | 1002 | case LPM_OP_SUSPEND_ACK: |
| 1003 | set_bit(STATE_SUSPENDED, &intel->flags); |
| 1004 | if (test_and_clear_bit(STATE_LPM_TRANSACTION, &intel->flags)) { |
| 1005 | smp_mb__after_atomic(); |
| 1006 | wake_up_bit(&intel->flags, STATE_LPM_TRANSACTION); |
| 1007 | } |
| 1008 | break; |
| 1009 | case LPM_OP_RESUME_ACK: |
| 1010 | clear_bit(STATE_SUSPENDED, &intel->flags); |
| 1011 | if (test_and_clear_bit(STATE_LPM_TRANSACTION, &intel->flags)) { |
| 1012 | smp_mb__after_atomic(); |
| 1013 | wake_up_bit(&intel->flags, STATE_LPM_TRANSACTION); |
| 1014 | } |
| 1015 | break; |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 1016 | default: |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 1017 | bt_dev_err(hdev, "Unknown LPM opcode (%02x)", lpm->opcode); |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 1018 | break; |
| 1019 | } |
| 1020 | |
| 1021 | kfree_skb(skb); |
| 1022 | |
| 1023 | return 0; |
| 1024 | } |
| 1025 | |
| 1026 | #define INTEL_RECV_LPM \ |
| 1027 | .type = HCI_LPM_PKT, \ |
| 1028 | .hlen = HCI_LPM_HDR_SIZE, \ |
| 1029 | .loff = 1, \ |
| 1030 | .lsize = 1, \ |
| 1031 | .maxlen = HCI_LPM_MAX_SIZE |
| 1032 | |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 1033 | static const struct h4_recv_pkt intel_recv_pkts[] = { |
Loic Poulain | b98469f | 2015-08-29 13:38:19 +0200 | [diff] [blame] | 1034 | { H4_RECV_ACL, .recv = hci_recv_frame }, |
| 1035 | { H4_RECV_SCO, .recv = hci_recv_frame }, |
| 1036 | { H4_RECV_EVENT, .recv = intel_recv_event }, |
| 1037 | { INTEL_RECV_LPM, .recv = intel_recv_lpm }, |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 1038 | }; |
| 1039 | |
| 1040 | static int intel_recv(struct hci_uart *hu, const void *data, int count) |
| 1041 | { |
| 1042 | struct intel_data *intel = hu->priv; |
| 1043 | |
| 1044 | if (!test_bit(HCI_UART_REGISTERED, &hu->flags)) |
| 1045 | return -EUNATCH; |
| 1046 | |
| 1047 | intel->rx_skb = h4_recv_buf(hu->hdev, intel->rx_skb, data, count, |
| 1048 | intel_recv_pkts, |
| 1049 | ARRAY_SIZE(intel_recv_pkts)); |
| 1050 | if (IS_ERR(intel->rx_skb)) { |
| 1051 | int err = PTR_ERR(intel->rx_skb); |
Loic Poulain | f44e78a | 2015-08-31 18:34:30 +0200 | [diff] [blame] | 1052 | bt_dev_err(hu->hdev, "Frame reassembly failed (%d)", err); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 1053 | intel->rx_skb = NULL; |
| 1054 | return err; |
| 1055 | } |
| 1056 | |
| 1057 | return count; |
| 1058 | } |
| 1059 | |
| 1060 | static int intel_enqueue(struct hci_uart *hu, struct sk_buff *skb) |
| 1061 | { |
| 1062 | struct intel_data *intel = hu->priv; |
Loic Poulain | 74cdad3 | 2015-09-02 12:04:13 +0200 | [diff] [blame] | 1063 | struct list_head *p; |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 1064 | |
| 1065 | BT_DBG("hu %p skb %p", hu, skb); |
| 1066 | |
Johan Hovold | 6e7de39 | 2017-03-29 18:15:28 +0200 | [diff] [blame] | 1067 | if (!hu->tty->dev) |
| 1068 | goto out_enqueue; |
| 1069 | |
Loic Poulain | 74cdad3 | 2015-09-02 12:04:13 +0200 | [diff] [blame] | 1070 | /* Be sure our controller is resumed and potential LPM transaction |
| 1071 | * completed before enqueuing any packet. |
| 1072 | */ |
| 1073 | mutex_lock(&intel_device_list_lock); |
| 1074 | list_for_each(p, &intel_device_list) { |
| 1075 | struct intel_device *idev = list_entry(p, struct intel_device, |
| 1076 | list); |
| 1077 | |
| 1078 | if (hu->tty->dev->parent == idev->pdev->dev.parent) { |
| 1079 | pm_runtime_get_sync(&idev->pdev->dev); |
| 1080 | pm_runtime_mark_last_busy(&idev->pdev->dev); |
| 1081 | pm_runtime_put_autosuspend(&idev->pdev->dev); |
| 1082 | break; |
| 1083 | } |
| 1084 | } |
| 1085 | mutex_unlock(&intel_device_list_lock); |
Johan Hovold | 6e7de39 | 2017-03-29 18:15:28 +0200 | [diff] [blame] | 1086 | out_enqueue: |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 1087 | skb_queue_tail(&intel->txq, skb); |
| 1088 | |
| 1089 | return 0; |
| 1090 | } |
| 1091 | |
| 1092 | static struct sk_buff *intel_dequeue(struct hci_uart *hu) |
| 1093 | { |
| 1094 | struct intel_data *intel = hu->priv; |
| 1095 | struct sk_buff *skb; |
| 1096 | |
| 1097 | skb = skb_dequeue(&intel->txq); |
| 1098 | if (!skb) |
| 1099 | return skb; |
| 1100 | |
| 1101 | if (test_bit(STATE_BOOTLOADER, &intel->flags) && |
Marcel Holtmann | 618e8bc | 2015-11-05 07:33:56 +0100 | [diff] [blame] | 1102 | (hci_skb_pkt_type(skb) == HCI_COMMAND_PKT)) { |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 1103 | struct hci_command_hdr *cmd = (void *)skb->data; |
| 1104 | __u16 opcode = le16_to_cpu(cmd->opcode); |
| 1105 | |
| 1106 | /* When the 0xfc01 command is issued to boot into |
| 1107 | * the operational firmware, it will actually not |
| 1108 | * send a command complete event. To keep the flow |
| 1109 | * control working inject that event here. |
| 1110 | */ |
| 1111 | if (opcode == 0xfc01) |
| 1112 | inject_cmd_complete(hu->hdev, opcode); |
| 1113 | } |
| 1114 | |
| 1115 | /* Prepend skb with frame type */ |
Marcel Holtmann | 618e8bc | 2015-11-05 07:33:56 +0100 | [diff] [blame] | 1116 | memcpy(skb_push(skb, 1), &hci_skb_pkt_type(skb), 1); |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 1117 | |
| 1118 | return skb; |
| 1119 | } |
| 1120 | |
| 1121 | static const struct hci_uart_proto intel_proto = { |
| 1122 | .id = HCI_UART_INTEL, |
| 1123 | .name = "Intel", |
Marcel Holtmann | aee61f7 | 2015-10-20 21:30:45 +0200 | [diff] [blame] | 1124 | .manufacturer = 2, |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 1125 | .init_speed = 115200, |
Loic Poulain | ff28955 | 2015-08-25 17:55:44 +0200 | [diff] [blame] | 1126 | .oper_speed = 3000000, |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 1127 | .open = intel_open, |
| 1128 | .close = intel_close, |
| 1129 | .flush = intel_flush, |
| 1130 | .setup = intel_setup, |
Loic Poulain | ff28955 | 2015-08-25 17:55:44 +0200 | [diff] [blame] | 1131 | .set_baudrate = intel_set_baudrate, |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 1132 | .recv = intel_recv, |
| 1133 | .enqueue = intel_enqueue, |
| 1134 | .dequeue = intel_dequeue, |
| 1135 | }; |
| 1136 | |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 1137 | #ifdef CONFIG_ACPI |
| 1138 | static const struct acpi_device_id intel_acpi_match[] = { |
| 1139 | { "INT33E1", 0 }, |
| 1140 | { }, |
| 1141 | }; |
| 1142 | MODULE_DEVICE_TABLE(acpi, intel_acpi_match); |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 1143 | #endif |
| 1144 | |
Loic Poulain | 74cdad3 | 2015-09-02 12:04:13 +0200 | [diff] [blame] | 1145 | #ifdef CONFIG_PM |
Loic Poulain | f755247 | 2015-09-09 21:04:15 +0200 | [diff] [blame] | 1146 | static int intel_suspend_device(struct device *dev) |
Loic Poulain | aa6802d | 2015-09-02 12:04:12 +0200 | [diff] [blame] | 1147 | { |
| 1148 | struct intel_device *idev = dev_get_drvdata(dev); |
| 1149 | |
Loic Poulain | aa6802d | 2015-09-02 12:04:12 +0200 | [diff] [blame] | 1150 | mutex_lock(&idev->hu_lock); |
| 1151 | if (idev->hu) |
| 1152 | intel_lpm_suspend(idev->hu); |
| 1153 | mutex_unlock(&idev->hu_lock); |
| 1154 | |
| 1155 | return 0; |
| 1156 | } |
| 1157 | |
Loic Poulain | f755247 | 2015-09-09 21:04:15 +0200 | [diff] [blame] | 1158 | static int intel_resume_device(struct device *dev) |
Loic Poulain | aa6802d | 2015-09-02 12:04:12 +0200 | [diff] [blame] | 1159 | { |
| 1160 | struct intel_device *idev = dev_get_drvdata(dev); |
| 1161 | |
Loic Poulain | aa6802d | 2015-09-02 12:04:12 +0200 | [diff] [blame] | 1162 | mutex_lock(&idev->hu_lock); |
| 1163 | if (idev->hu) |
| 1164 | intel_lpm_resume(idev->hu); |
| 1165 | mutex_unlock(&idev->hu_lock); |
| 1166 | |
| 1167 | return 0; |
| 1168 | } |
| 1169 | #endif |
| 1170 | |
Loic Poulain | f755247 | 2015-09-09 21:04:15 +0200 | [diff] [blame] | 1171 | #ifdef CONFIG_PM_SLEEP |
| 1172 | static int intel_suspend(struct device *dev) |
| 1173 | { |
| 1174 | struct intel_device *idev = dev_get_drvdata(dev); |
| 1175 | |
| 1176 | if (device_may_wakeup(dev)) |
| 1177 | enable_irq_wake(idev->irq); |
| 1178 | |
| 1179 | return intel_suspend_device(dev); |
| 1180 | } |
| 1181 | |
| 1182 | static int intel_resume(struct device *dev) |
| 1183 | { |
| 1184 | struct intel_device *idev = dev_get_drvdata(dev); |
| 1185 | |
| 1186 | if (device_may_wakeup(dev)) |
| 1187 | disable_irq_wake(idev->irq); |
| 1188 | |
| 1189 | return intel_resume_device(dev); |
| 1190 | } |
| 1191 | #endif |
| 1192 | |
Loic Poulain | aa6802d | 2015-09-02 12:04:12 +0200 | [diff] [blame] | 1193 | static const struct dev_pm_ops intel_pm_ops = { |
| 1194 | SET_SYSTEM_SLEEP_PM_OPS(intel_suspend, intel_resume) |
Loic Poulain | f755247 | 2015-09-09 21:04:15 +0200 | [diff] [blame] | 1195 | SET_RUNTIME_PM_OPS(intel_suspend_device, intel_resume_device, NULL) |
Loic Poulain | aa6802d | 2015-09-02 12:04:12 +0200 | [diff] [blame] | 1196 | }; |
| 1197 | |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 1198 | static int intel_probe(struct platform_device *pdev) |
| 1199 | { |
| 1200 | struct intel_device *idev; |
| 1201 | |
| 1202 | idev = devm_kzalloc(&pdev->dev, sizeof(*idev), GFP_KERNEL); |
| 1203 | if (!idev) |
| 1204 | return -ENOMEM; |
| 1205 | |
Loic Poulain | aa6802d | 2015-09-02 12:04:12 +0200 | [diff] [blame] | 1206 | mutex_init(&idev->hu_lock); |
| 1207 | |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 1208 | idev->pdev = pdev; |
| 1209 | |
Loic Poulain | 32b9ccb | 2016-04-28 18:48:25 +0200 | [diff] [blame] | 1210 | idev->reset = devm_gpiod_get(&pdev->dev, "reset", GPIOD_OUT_LOW); |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 1211 | if (IS_ERR(idev->reset)) { |
| 1212 | dev_err(&pdev->dev, "Unable to retrieve gpio\n"); |
| 1213 | return PTR_ERR(idev->reset); |
| 1214 | } |
| 1215 | |
Loic Poulain | 765ea3a | 2015-08-29 13:38:18 +0200 | [diff] [blame] | 1216 | idev->irq = platform_get_irq(pdev, 0); |
| 1217 | if (idev->irq < 0) { |
| 1218 | struct gpio_desc *host_wake; |
| 1219 | |
| 1220 | dev_err(&pdev->dev, "No IRQ, falling back to gpio-irq\n"); |
| 1221 | |
Loic Poulain | 32b9ccb | 2016-04-28 18:48:25 +0200 | [diff] [blame] | 1222 | host_wake = devm_gpiod_get(&pdev->dev, "host-wake", GPIOD_IN); |
Loic Poulain | 765ea3a | 2015-08-29 13:38:18 +0200 | [diff] [blame] | 1223 | if (IS_ERR(host_wake)) { |
| 1224 | dev_err(&pdev->dev, "Unable to retrieve IRQ\n"); |
| 1225 | goto no_irq; |
| 1226 | } |
| 1227 | |
| 1228 | idev->irq = gpiod_to_irq(host_wake); |
| 1229 | if (idev->irq < 0) { |
| 1230 | dev_err(&pdev->dev, "No corresponding irq for gpio\n"); |
| 1231 | goto no_irq; |
| 1232 | } |
| 1233 | } |
| 1234 | |
| 1235 | /* Only enable wake-up/irq when controller is powered */ |
| 1236 | device_set_wakeup_capable(&pdev->dev, true); |
| 1237 | device_wakeup_disable(&pdev->dev); |
| 1238 | |
| 1239 | no_irq: |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 1240 | platform_set_drvdata(pdev, idev); |
| 1241 | |
| 1242 | /* Place this instance on the device list */ |
Loic Poulain | 67c8bde | 2015-08-31 18:34:31 +0200 | [diff] [blame] | 1243 | mutex_lock(&intel_device_list_lock); |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 1244 | list_add_tail(&idev->list, &intel_device_list); |
Loic Poulain | 67c8bde | 2015-08-31 18:34:31 +0200 | [diff] [blame] | 1245 | mutex_unlock(&intel_device_list_lock); |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 1246 | |
Loic Poulain | 765ea3a | 2015-08-29 13:38:18 +0200 | [diff] [blame] | 1247 | dev_info(&pdev->dev, "registered, gpio(%d)/irq(%d).\n", |
| 1248 | desc_to_gpio(idev->reset), idev->irq); |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 1249 | |
| 1250 | return 0; |
| 1251 | } |
| 1252 | |
| 1253 | static int intel_remove(struct platform_device *pdev) |
| 1254 | { |
| 1255 | struct intel_device *idev = platform_get_drvdata(pdev); |
| 1256 | |
Loic Poulain | 765ea3a | 2015-08-29 13:38:18 +0200 | [diff] [blame] | 1257 | device_wakeup_disable(&pdev->dev); |
| 1258 | |
Loic Poulain | 67c8bde | 2015-08-31 18:34:31 +0200 | [diff] [blame] | 1259 | mutex_lock(&intel_device_list_lock); |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 1260 | list_del(&idev->list); |
Loic Poulain | 67c8bde | 2015-08-31 18:34:31 +0200 | [diff] [blame] | 1261 | mutex_unlock(&intel_device_list_lock); |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 1262 | |
| 1263 | dev_info(&pdev->dev, "unregistered.\n"); |
| 1264 | |
| 1265 | return 0; |
| 1266 | } |
| 1267 | |
| 1268 | static struct platform_driver intel_driver = { |
| 1269 | .probe = intel_probe, |
| 1270 | .remove = intel_remove, |
| 1271 | .driver = { |
| 1272 | .name = "hci_intel", |
| 1273 | .acpi_match_table = ACPI_PTR(intel_acpi_match), |
Loic Poulain | aa6802d | 2015-09-02 12:04:12 +0200 | [diff] [blame] | 1274 | .pm = &intel_pm_ops, |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 1275 | }, |
| 1276 | }; |
| 1277 | |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 1278 | int __init intel_init(void) |
| 1279 | { |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 1280 | platform_driver_register(&intel_driver); |
| 1281 | |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 1282 | return hci_uart_register_proto(&intel_proto); |
| 1283 | } |
| 1284 | |
| 1285 | int __exit intel_deinit(void) |
| 1286 | { |
Loic Poulain | 1ab1f23 | 2015-08-27 07:21:51 +0200 | [diff] [blame] | 1287 | platform_driver_unregister(&intel_driver); |
| 1288 | |
Loic Poulain | ca93cee | 2015-07-01 12:20:26 +0200 | [diff] [blame] | 1289 | return hci_uart_unregister_proto(&intel_proto); |
| 1290 | } |