diff options
Diffstat (limited to 'drivers/bluetooth/hci_intel.c')
| -rw-r--r-- | drivers/bluetooth/hci_intel.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/drivers/bluetooth/hci_intel.c b/drivers/bluetooth/hci_intel.c index 21dfa89751df..da3192aee5e1 100644 --- a/drivers/bluetooth/hci_intel.c +++ b/drivers/bluetooth/hci_intel.c @@ -45,6 +45,38 @@ struct intel_data { unsigned long flags; }; +static u8 intel_convert_speed(unsigned int speed) +{ + switch (speed) { + case 9600: + return 0x00; + case 19200: + return 0x01; + case 38400: + return 0x02; + case 57600: + return 0x03; + case 115200: + return 0x04; + case 230400: + return 0x05; + case 460800: + return 0x06; + case 921600: + return 0x07; + case 1843200: + return 0x08; + case 3250000: + return 0x09; + case 2000000: + return 0x0a; + case 3000000: + return 0x0b; + default: + return 0xff; + } +} + static int intel_open(struct hci_uart *hu) { struct intel_data *intel; @@ -111,6 +143,56 @@ static int inject_cmd_complete(struct hci_dev *hdev, __u16 opcode) return hci_recv_frame(hdev, skb); } +static int intel_set_baudrate(struct hci_uart *hu, unsigned int speed) +{ + struct intel_data *intel = hu->priv; + struct hci_dev *hdev = hu->hdev; + u8 speed_cmd[] = { 0x06, 0xfc, 0x01, 0x00 }; + struct sk_buff *skb; + + BT_INFO("%s: Change controller speed to %d", hdev->name, speed); + + speed_cmd[3] = intel_convert_speed(speed); + if (speed_cmd[3] == 0xff) { + BT_ERR("%s: Unsupported speed", hdev->name); + return -EINVAL; + } + + /* Device will not accept speed change if Intel version has not been + * previously requested. + */ + skb = __hci_cmd_sync(hdev, 0xfc05, 0, NULL, HCI_INIT_TIMEOUT); + if (IS_ERR(skb)) { + BT_ERR("%s: Reading Intel version information failed (%ld)", + hdev->name, PTR_ERR(skb)); + return PTR_ERR(skb); + } + kfree_skb(skb); + + skb = bt_skb_alloc(sizeof(speed_cmd), GFP_KERNEL); + if (!skb) { + BT_ERR("%s: Failed to allocate memory for baudrate packet", + hdev->name); + return -ENOMEM; + } + + memcpy(skb_put(skb, sizeof(speed_cmd)), speed_cmd, sizeof(speed_cmd)); + bt_cb(skb)->pkt_type = HCI_COMMAND_PKT; + + hci_uart_set_flow_control(hu, true); + + skb_queue_tail(&intel->txq, skb); + hci_uart_tx_wakeup(hu); + + /* wait 100ms to change baudrate on controller side */ + msleep(100); + + hci_uart_set_baudrate(hu, speed); + hci_uart_set_flow_control(hu, false); + + return 0; +} + static int intel_setup(struct hci_uart *hu) { static const u8 reset_param[] = { 0x00, 0x01, 0x00, 0x01, @@ -126,6 +208,8 @@ static int intel_setup(struct hci_uart *hu) u32 frag_len; ktime_t calltime, delta, rettime; unsigned long long duration; + unsigned int init_speed, oper_speed; + int speed_change = 0; int err; BT_DBG("%s", hdev->name); @@ -134,6 +218,19 @@ static int intel_setup(struct hci_uart *hu) calltime = ktime_get(); + if (hu->init_speed) + init_speed = hu->init_speed; + else + init_speed = hu->proto->init_speed; + + if (hu->oper_speed) + oper_speed = hu->oper_speed; + else + oper_speed = hu->proto->oper_speed; + + if (oper_speed && init_speed && oper_speed != init_speed) + speed_change = 1; + set_bit(STATE_BOOTLOADER, &intel->flags); /* Read the Intel version information to determine if the device @@ -416,6 +513,13 @@ done: if (err < 0) return err; + /* We need to restore the default speed before Intel reset */ + if (speed_change) { + err = intel_set_baudrate(hu, init_speed); + if (err) + return err; + } + calltime = ktime_get(); set_bit(STATE_BOOTING, &intel->flags); @@ -456,6 +560,19 @@ done: BT_INFO("%s: Device booted in %llu usecs", hdev->name, duration); + skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_CMD_TIMEOUT); + if (IS_ERR(skb)) + return PTR_ERR(skb); + kfree_skb(skb); + + if (speed_change) { + err = intel_set_baudrate(hu, oper_speed); + if (err) + return err; + } + + BT_INFO("%s: Setup complete", hdev->name); + clear_bit(STATE_BOOTLOADER, &intel->flags); return 0; @@ -572,10 +689,12 @@ static const struct hci_uart_proto intel_proto = { .id = HCI_UART_INTEL, .name = "Intel", .init_speed = 115200, + .oper_speed = 3000000, .open = intel_open, .close = intel_close, .flush = intel_flush, .setup = intel_setup, + .set_baudrate = intel_set_baudrate, .recv = intel_recv, .enqueue = intel_enqueue, .dequeue = intel_dequeue, |