This improves the inband IR command handling for NXP BT chipsets.
When the IR vendor command is received, the driver injects a HW
error event, which causes a reset sequence in hci_error_reset().
The vendor IR command is sent to the controller while hci dev
is been closed, and FW is re-downloaded when nxp_setup() is
called during hci_dev_do_open().
The HCI_SETUP flag is set in nxp_hw_err() to make sure that
nxp_setup() is been called during hci_dev_do_open().
This also makes the nxp_setup() and power save functions more
generic.
Signed-off-by: Neeraj Sanjay Kale <[email protected]>
---
drivers/bluetooth/btnxpuart.c | 172 +++++++++++++++++++---------------
1 file changed, 96 insertions(+), 76 deletions(-)
diff --git a/drivers/bluetooth/btnxpuart.c b/drivers/bluetooth/btnxpuart.c
index ee6f6c872a34..de92fc0f08ad 100644
--- a/drivers/bluetooth/btnxpuart.c
+++ b/drivers/bluetooth/btnxpuart.c
@@ -28,6 +28,10 @@
#define BTNXPUART_FW_DOWNLOADING 2
#define BTNXPUART_CHECK_BOOT_SIGNATURE 3
#define BTNXPUART_SERDEV_OPEN 4
+#define BTNXPUART_IR_IN_PROGRESS 5
+
+/* NXP HW err codes */
+#define BTNXPUART_IR_HW_ERR 0xb0
#define FIRMWARE_W8987 "nxp/uartuart8987_bt.bin"
#define FIRMWARE_W8997 "nxp/uartuart8997_bt_v4.bin"
@@ -375,39 +379,13 @@ static void ps_timeout_func(struct timer_list *t)
}
}
-static int ps_init_work(struct hci_dev *hdev)
+static void ps_setup(struct hci_dev *hdev)
{
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
struct ps_data *psdata = &nxpdev->psdata;
- psdata->h2c_ps_interval = PS_DEFAULT_TIMEOUT_PERIOD_MS;
- psdata->ps_state = PS_STATE_AWAKE;
- psdata->target_ps_mode = DEFAULT_PS_MODE;
psdata->hdev = hdev;
- psdata->c2h_wakeupmode = BT_HOST_WAKEUP_METHOD_NONE;
- psdata->c2h_wakeup_gpio = 0xff;
-
- switch (DEFAULT_H2C_WAKEUP_MODE) {
- case WAKEUP_METHOD_DTR:
- psdata->h2c_wakeupmode = WAKEUP_METHOD_DTR;
- break;
- case WAKEUP_METHOD_BREAK:
- default:
- psdata->h2c_wakeupmode = WAKEUP_METHOD_BREAK;
- break;
- }
- psdata->cur_psmode = PS_MODE_DISABLE;
- psdata->cur_h2c_wakeupmode = WAKEUP_METHOD_INVALID;
INIT_WORK(&psdata->work, ps_work_func);
-
- return 0;
-}
-
-static void ps_init_timer(struct hci_dev *hdev)
-{
- struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
- struct ps_data *psdata = &nxpdev->psdata;
-
timer_setup(&psdata->ps_timer, ps_timeout_func, 0);
}
@@ -510,19 +488,31 @@ static void ps_init(struct hci_dev *hdev)
serdev_device_set_tiocm(nxpdev->serdev, TIOCM_RTS, 0);
usleep_range(5000, 10000);
- switch (psdata->h2c_wakeupmode) {
+ psdata->ps_state = PS_STATE_AWAKE;
+ psdata->c2h_wakeupmode = BT_HOST_WAKEUP_METHOD_NONE;
+ psdata->c2h_wakeup_gpio = 0xff;
+
+ psdata->cur_h2c_wakeupmode = WAKEUP_METHOD_INVALID;
+ psdata->h2c_ps_interval = PS_DEFAULT_TIMEOUT_PERIOD_MS;
+ switch (DEFAULT_H2C_WAKEUP_MODE) {
case WAKEUP_METHOD_DTR:
+ psdata->h2c_wakeupmode = WAKEUP_METHOD_DTR;
serdev_device_set_tiocm(nxpdev->serdev, 0, TIOCM_DTR);
serdev_device_set_tiocm(nxpdev->serdev, TIOCM_DTR, 0);
break;
case WAKEUP_METHOD_BREAK:
default:
+ psdata->h2c_wakeupmode = WAKEUP_METHOD_BREAK;
serdev_device_break_ctl(nxpdev->serdev, -1);
usleep_range(5000, 10000);
serdev_device_break_ctl(nxpdev->serdev, 0);
usleep_range(5000, 10000);
break;
}
+
+ psdata->cur_psmode = PS_MODE_DISABLE;
+ psdata->target_ps_mode = DEFAULT_PS_MODE;
+
if (psdata->cur_h2c_wakeupmode != psdata->h2c_wakeupmode)
hci_cmd_sync_queue(hdev, send_wakeup_method_cmd, NULL, NULL);
if (psdata->cur_psmode != psdata->target_ps_mode)
@@ -702,7 +692,7 @@ static int nxp_recv_chip_ver_v1(struct hci_dev *hdev, struct sk_buff *skb)
goto free_skb;
chip_id = le16_to_cpu(req->chip_id ^ req->chip_id_comp);
- if (chip_id == 0xffff) {
+ if (chip_id == 0xffff && nxpdev->fw_dnld_v1_offset) {
nxpdev->fw_dnld_v1_offset = 0;
nxpdev->fw_v1_sent_bytes = 0;
nxpdev->fw_v1_expected_len = HDR_LEN;
@@ -969,45 +959,13 @@ static int nxp_set_baudrate_cmd(struct hci_dev *hdev, void *data)
return 0;
}
-static int nxp_set_ind_reset(struct hci_dev *hdev, void *data)
-{
- struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
- struct sk_buff *skb;
- u8 *status;
- u8 pcmd = 0;
- int err = 0;
-
- skb = nxp_drv_send_cmd(hdev, HCI_NXP_IND_RESET, 1, &pcmd);
- if (IS_ERR(skb))
- return PTR_ERR(skb);
-
- status = skb_pull_data(skb, 1);
- if (!status || *status)
- goto free_skb;
-
- set_bit(BTNXPUART_FW_DOWNLOADING, &nxpdev->tx_state);
- err = nxp_download_firmware(hdev);
- if (err < 0)
- goto free_skb;
- serdev_device_set_baudrate(nxpdev->serdev, nxpdev->fw_init_baudrate);
- nxpdev->current_baudrate = nxpdev->fw_init_baudrate;
- if (nxpdev->current_baudrate != HCI_NXP_SEC_BAUDRATE) {
- nxpdev->new_baudrate = HCI_NXP_SEC_BAUDRATE;
- nxp_set_baudrate_cmd(hdev, NULL);
- }
- hci_cmd_sync_queue(hdev, send_wakeup_method_cmd, NULL, NULL);
- hci_cmd_sync_queue(hdev, send_ps_cmd, NULL, NULL);
-
-free_skb:
- kfree_skb(skb);
- return err;
-}
-
-/* NXP protocol */
static int nxp_check_boot_sign(struct btnxpuart_dev *nxpdev)
{
serdev_device_set_baudrate(nxpdev->serdev, HCI_NXP_PRI_BAUDRATE);
- serdev_device_set_flow_control(nxpdev->serdev, true);
+ if (test_bit(BTNXPUART_IR_IN_PROGRESS, &nxpdev->tx_state))
+ serdev_device_set_flow_control(nxpdev->serdev, false);
+ else
+ serdev_device_set_flow_control(nxpdev->serdev, true);
set_bit(BTNXPUART_CHECK_BOOT_SIGNATURE, &nxpdev->tx_state);
return wait_event_interruptible_timeout(nxpdev->check_boot_sign_wait_q,
@@ -1016,15 +974,29 @@ static int nxp_check_boot_sign(struct btnxpuart_dev *nxpdev)
msecs_to_jiffies(1000));
}
+static int nxp_set_ind_reset(struct hci_dev *hdev, void *data)
+{
+ static const u8 ir_hw_err[] = { HCI_EV_HARDWARE_ERROR,
+ 0x01, BTNXPUART_IR_HW_ERR };
+ struct sk_buff *skb;
+
+ skb = bt_skb_alloc(3, GFP_ATOMIC);
+ if (!skb)
+ return -ENOMEM;
+
+ hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
+ skb_put_data(skb, ir_hw_err, 3);
+
+ /* Inject Hardware Error to upper stack */
+ return hci_recv_frame(hdev, skb);
+}
+
+/* NXP protocol */
static int nxp_setup(struct hci_dev *hdev)
{
struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
int err = 0;
- set_bit(BTNXPUART_FW_DOWNLOADING, &nxpdev->tx_state);
- init_waitqueue_head(&nxpdev->fw_dnld_done_wait_q);
- init_waitqueue_head(&nxpdev->check_boot_sign_wait_q);
-
if (nxp_check_boot_sign(nxpdev)) {
bt_dev_dbg(hdev, "Need FW Download.");
err = nxp_download_firmware(hdev);
@@ -1035,10 +1007,6 @@ static int nxp_setup(struct hci_dev *hdev)
clear_bit(BTNXPUART_FW_DOWNLOADING, &nxpdev->tx_state);
}
- device_property_read_u32(&nxpdev->serdev->dev, "fw-init-baudrate",
- &nxpdev->fw_init_baudrate);
- if (!nxpdev->fw_init_baudrate)
- nxpdev->fw_init_baudrate = FW_INIT_BAUDRATE;
serdev_device_set_baudrate(nxpdev->serdev, nxpdev->fw_init_baudrate);
nxpdev->current_baudrate = nxpdev->fw_init_baudrate;
@@ -1049,6 +1017,46 @@ static int nxp_setup(struct hci_dev *hdev)
ps_init(hdev);
+ if (test_and_clear_bit(BTNXPUART_IR_IN_PROGRESS, &nxpdev->tx_state))
+ hci_dev_clear_flag(hdev, HCI_SETUP);
+
+ return 0;
+}
+
+static void nxp_hw_err(struct hci_dev *hdev, u8 code)
+{
+ struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
+
+ switch (code) {
+ case BTNXPUART_IR_HW_ERR:
+ set_bit(BTNXPUART_IR_IN_PROGRESS, &nxpdev->tx_state);
+ hci_dev_set_flag(hdev, HCI_SETUP);
+ break;
+ default:
+ break;
+ }
+}
+
+static int nxp_shutdown(struct hci_dev *hdev)
+{
+ struct btnxpuart_dev *nxpdev = hci_get_drvdata(hdev);
+ struct sk_buff *skb;
+ u8 *status;
+ u8 pcmd = 0;
+
+ if (test_bit(BTNXPUART_IR_IN_PROGRESS, &nxpdev->tx_state)) {
+ skb = nxp_drv_send_cmd(hdev, HCI_NXP_IND_RESET, 1, &pcmd);
+ if (IS_ERR(skb))
+ return PTR_ERR(skb);
+
+ status = skb_pull_data(skb, 1);
+ if (status) {
+ serdev_device_set_flow_control(nxpdev->serdev, false);
+ set_bit(BTNXPUART_FW_DOWNLOADING, &nxpdev->tx_state);
+ }
+ kfree_skb(skb);
+ }
+
return 0;
}
@@ -1256,7 +1264,8 @@ static int btnxpuart_receive_buf(struct serdev_device *serdev, const u8 *data,
nxpdev->rx_skb = NULL;
return err;
}
- nxpdev->hdev->stat.byte_rx += count;
+ if (!is_fw_downloading(nxpdev))
+ nxpdev->hdev->stat.byte_rx += count;
return count;
}
@@ -1289,6 +1298,16 @@ static int nxp_serdev_probe(struct serdev_device *serdev)
INIT_WORK(&nxpdev->tx_work, btnxpuart_tx_work);
skb_queue_head_init(&nxpdev->txq);
+ init_waitqueue_head(&nxpdev->fw_dnld_done_wait_q);
+ init_waitqueue_head(&nxpdev->check_boot_sign_wait_q);
+
+ device_property_read_u32(&nxpdev->serdev->dev, "fw-init-baudrate",
+ &nxpdev->fw_init_baudrate);
+ if (!nxpdev->fw_init_baudrate)
+ nxpdev->fw_init_baudrate = FW_INIT_BAUDRATE;
+
+ set_bit(BTNXPUART_FW_DOWNLOADING, &nxpdev->tx_state);
+
crc8_populate_msb(crc8_table, POLYNOMIAL8);
/* Initialize and register HCI device */
@@ -1309,6 +1328,8 @@ static int nxp_serdev_probe(struct serdev_device *serdev)
hdev->flush = btnxpuart_flush;
hdev->setup = nxp_setup;
hdev->send = nxp_enqueue;
+ hdev->hw_error = nxp_hw_err;
+ hdev->shutdown = nxp_shutdown;
SET_HCIDEV_DEV(hdev, &serdev->dev);
if (hci_register_dev(hdev) < 0) {
@@ -1317,8 +1338,7 @@ static int nxp_serdev_probe(struct serdev_device *serdev)
return -ENODEV;
}
- ps_init_work(hdev);
- ps_init_timer(hdev);
+ ps_setup(hdev);
return 0;
}
--
2.34.1