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authorKiran K <kiran.k@intel.com>2020-06-25 00:04:32 +0530
committerMarcel Holtmann <marcel@holtmann.org>2020-06-25 10:43:38 +0200
commit5ea7c81a4f34e4dbb9c7bfd0fe18e5fba8a7f8f9 (patch)
treec311b8136b40f7551fa1b35e8013ad21aaa46549 /drivers/bluetooth
parent3a0377d993d7c62cbff623bce13eac077490f560 (diff)
Bluetooth: btusb: Refactor of firmware download flow for Intel conrollers
Address the scalability to support new generation Intel controller with respect to readability and enhancement to new firmware download sequence Signed-off-by: Kiran K <kiran.k@intel.com> Reviewed-by: Chethan T N <chethan.tumkur.narayan@intel.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'drivers/bluetooth')
-rw-r--r--drivers/bluetooth/btusb.c145
1 files changed, 80 insertions, 65 deletions
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 1ac6fd7c4534..f8a71fdabb3d 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -511,7 +511,6 @@ struct btusb_data {
unsigned cmd_timeout_cnt;
};
-
static void btusb_intel_cmd_timeout(struct hci_dev *hdev)
{
struct btusb_data *data = hci_get_drvdata(hdev);
@@ -2278,46 +2277,25 @@ static bool btusb_setup_intel_new_get_fw_name(struct intel_version *ver,
return true;
}
-static int btusb_setup_intel_new(struct hci_dev *hdev)
+static int btusb_intel_download_firmware(struct hci_dev *hdev,
+ struct intel_version *ver,
+ struct intel_boot_params *params)
{
- struct btusb_data *data = hci_get_drvdata(hdev);
- struct intel_version ver;
- struct intel_boot_params params;
- struct intel_debug_features features;
const struct firmware *fw;
u32 boot_param;
char fwname[64];
- ktime_t calltime, delta, rettime;
- unsigned long long duration;
int err;
+ struct btusb_data *data = hci_get_drvdata(hdev);
- BT_DBG("%s", hdev->name);
-
- /* Set the default boot parameter to 0x0 and it is updated to
- * SKU specific boot parameter after reading Intel_Write_Boot_Params
- * command while downloading the firmware.
- */
- boot_param = 0x00000000;
-
- calltime = ktime_get();
-
- /* Read the Intel version information to determine if the device
- * is in bootloader mode or if it already has operational firmware
- * loaded.
- */
- err = btintel_read_version(hdev, &ver);
- if (err) {
- bt_dev_err(hdev, "Intel Read version failed (%d)", err);
- btintel_reset_to_bootloader(hdev);
- return err;
- }
+ if (!ver || !params)
+ return -EINVAL;
/* The hardware platform number has a fixed value of 0x37 and
* for now only accept this single value.
*/
- if (ver.hw_platform != 0x37) {
+ if (ver->hw_platform != 0x37) {
bt_dev_err(hdev, "Unsupported Intel hardware platform (%u)",
- ver.hw_platform);
+ ver->hw_platform);
return -EINVAL;
}
@@ -2327,7 +2305,7 @@ static int btusb_setup_intel_new(struct hci_dev *hdev)
* This check has been put in place to ensure correct forward
* compatibility options when newer hardware variants come along.
*/
- switch (ver.hw_variant) {
+ switch (ver->hw_variant) {
case 0x0b: /* SfP */
case 0x0c: /* WsP */
case 0x11: /* JfP */
@@ -2337,11 +2315,11 @@ static int btusb_setup_intel_new(struct hci_dev *hdev)
break;
default:
bt_dev_err(hdev, "Unsupported Intel hardware variant (%u)",
- ver.hw_variant);
+ ver->hw_variant);
return -EINVAL;
}
- btintel_version_info(hdev, &ver);
+ btintel_version_info(hdev, ver);
/* The firmware variant determines if the device is in bootloader
* mode or is running operational firmware. The value 0x06 identifies
@@ -2356,25 +2334,25 @@ static int btusb_setup_intel_new(struct hci_dev *hdev)
* It is not possible to use the Secure Boot Parameters in this
* case since that command is only available in bootloader mode.
*/
- if (ver.fw_variant == 0x23) {
+ if (ver->fw_variant == 0x23) {
clear_bit(BTUSB_BOOTLOADER, &data->flags);
btintel_check_bdaddr(hdev);
- goto finish;
+ return 0;
}
/* If the device is not in bootloader mode, then the only possible
* choice is to return an error and abort the device initialization.
*/
- if (ver.fw_variant != 0x06) {
+ if (ver->fw_variant != 0x06) {
bt_dev_err(hdev, "Unsupported Intel firmware variant (%u)",
- ver.fw_variant);
+ ver->fw_variant);
return -ENODEV;
}
/* Read the secure boot parameters to identify the operating
* details of the bootloader.
*/
- err = btintel_read_boot_params(hdev, &params);
+ err = btintel_read_boot_params(hdev, params);
if (err)
return err;
@@ -2382,16 +2360,16 @@ static int btusb_setup_intel_new(struct hci_dev *hdev)
* with a command complete event. If the boot parameters indicate
* that this bootloader does not send them, then abort the setup.
*/
- if (params.limited_cce != 0x00) {
+ if (params->limited_cce != 0x00) {
bt_dev_err(hdev, "Unsupported Intel firmware loading method (%u)",
- params.limited_cce);
+ params->limited_cce);
return -EINVAL;
}
/* If the OTP has no valid Bluetooth device address, then there will
* also be no valid address for the operational firmware.
*/
- if (!bacmp(&params.otp_bdaddr, BDADDR_ANY)) {
+ if (!bacmp(&params->otp_bdaddr, BDADDR_ANY)) {
bt_dev_info(hdev, "No device address configured");
set_bit(HCI_QUIRK_INVALID_BDADDR, &hdev->quirks);
}
@@ -2417,7 +2395,7 @@ static int btusb_setup_intel_new(struct hci_dev *hdev)
* ibt-<hw_variant>-<hw_revision>-<fw_revision>.sfi.
*
*/
- err = btusb_setup_intel_new_get_fw_name(&ver, &params, fwname,
+ err = btusb_setup_intel_new_get_fw_name(ver, params, fwname,
sizeof(fwname), "sfi");
if (!err) {
bt_dev_err(hdev, "Unsupported Intel firmware naming");
@@ -2432,16 +2410,6 @@ static int btusb_setup_intel_new(struct hci_dev *hdev)
bt_dev_info(hdev, "Found device firmware: %s", fwname);
- /* Save the DDC file name for later use to apply once the firmware
- * downloading is done.
- */
- err = btusb_setup_intel_new_get_fw_name(&ver, &params, fwname,
- sizeof(fwname), "ddc");
- if (!err) {
- bt_dev_err(hdev, "Unsupported Intel firmware naming");
- return -EINVAL;
- }
-
if (fw->size < 644) {
bt_dev_err(hdev, "Invalid size of firmware file (%zu)",
fw->size);
@@ -2496,18 +2464,58 @@ static int btusb_setup_intel_new(struct hci_dev *hdev)
goto done;
}
+done:
+ release_firmware(fw);
+ return err;
+}
+
+static int btusb_setup_intel_new(struct hci_dev *hdev)
+{
+ struct btusb_data *data = hci_get_drvdata(hdev);
+ struct intel_version ver;
+ struct intel_boot_params params;
+ u32 boot_param;
+ char ddcname[64];
+ ktime_t calltime, delta, rettime;
+ unsigned long long duration;
+ int err;
+ struct intel_debug_features features;
+
+ BT_DBG("%s", hdev->name);
+
+ /* Set the default boot parameter to 0x0 and it is updated to
+ * SKU specific boot parameter after reading Intel_Write_Boot_Params
+ * command while downloading the firmware.
+ */
+ boot_param = 0x00000000;
+
+ calltime = ktime_get();
+
+ /* Read the Intel version information to determine if the device
+ * is in bootloader mode or if it already has operational firmware
+ * loaded.
+ */
+ err = btintel_read_version(hdev, &ver);
+ if (err) {
+ bt_dev_err(hdev, "Intel Read version failed (%d)", err);
+ btintel_reset_to_bootloader(hdev);
+ return err;
+ }
+
+ err = btusb_intel_download_firmware(hdev, &ver, &params);
+ if (err)
+ return err;
+
+ /* controller is already having an operational firmware */
+ if (ver.fw_variant == 0x23)
+ goto finish;
+
rettime = ktime_get();
delta = ktime_sub(rettime, calltime);
duration = (unsigned long long) ktime_to_ns(delta) >> 10;
bt_dev_info(hdev, "Firmware loaded in %llu usecs", duration);
-done:
- release_firmware(fw);
-
- if (err < 0)
- return err;
-
calltime = ktime_get();
set_bit(BTUSB_BOOTING, &data->flags);
@@ -2551,13 +2559,20 @@ done:
clear_bit(BTUSB_BOOTLOADER, &data->flags);
- /* Once the device is running in operational mode, it needs to apply
- * the device configuration (DDC) parameters.
- *
- * The device can work without DDC parameters, so even if it fails
- * to load the file, no need to fail the setup.
- */
- btintel_load_ddc_config(hdev, fwname);
+ err = btusb_setup_intel_new_get_fw_name(&ver, &params, ddcname,
+ sizeof(ddcname), "ddc");
+
+ if (!err) {
+ bt_dev_err(hdev, "Unsupported Intel firmware naming");
+ } else {
+ /* Once the device is running in operational mode, it needs to
+ * apply the device configuration (DDC) parameters.
+ *
+ * The device can work without DDC parameters, so even if it
+ * fails to load the file, no need to fail the setup.
+ */
+ btintel_load_ddc_config(hdev, ddcname);
+ }
/* Read the Intel supported features and if new exception formats
* supported, need to load the additional DDC config to enable.