diff options
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/hif_usb.c | 154 | ||||
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/hif_usb.h | 3 |
2 files changed, 101 insertions, 56 deletions
diff --git a/drivers/net/wireless/ath/ath9k/hif_usb.c b/drivers/net/wireless/ath/ath9k/hif_usb.c index 77c8ded8de57..f317515d8bf3 100644 --- a/drivers/net/wireless/ath/ath9k/hif_usb.c +++ b/drivers/net/wireless/ath/ath9k/hif_usb.c @@ -968,8 +968,7 @@ static void ath9k_hif_usb_dealloc_urbs(struct hif_device_usb *hif_dev) ath9k_hif_usb_dealloc_rx_urbs(hif_dev); } -static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev, - u32 drv_info) +static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev) { int transfer, err; const void *data = hif_dev->firmware->data; @@ -1000,7 +999,7 @@ static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev, } kfree(buf); - if (IS_AR7010_DEVICE(drv_info)) + if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info)) firm_offset = AR7010_FIRMWARE_TEXT; else firm_offset = AR9271_FIRMWARE_TEXT; @@ -1021,28 +1020,18 @@ static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev, return 0; } -static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev, u32 drv_info) +static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev) { - int ret, idx; struct usb_host_interface *alt = &hif_dev->interface->altsetting[0]; struct usb_endpoint_descriptor *endp; + int ret, idx; - /* Request firmware */ - ret = request_firmware(&hif_dev->firmware, hif_dev->fw_name, - &hif_dev->udev->dev); - if (ret) { - dev_err(&hif_dev->udev->dev, - "ath9k_htc: Firmware - %s not found\n", hif_dev->fw_name); - goto err_fw_req; - } - - /* Download firmware */ - ret = ath9k_hif_usb_download_fw(hif_dev, drv_info); + ret = ath9k_hif_usb_download_fw(hif_dev); if (ret) { dev_err(&hif_dev->udev->dev, "ath9k_htc: Firmware - %s download failed\n", hif_dev->fw_name); - goto err_fw_download; + return ret; } /* On downloading the firmware to the target, the USB descriptor of EP4 @@ -1064,23 +1053,84 @@ static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev, u32 drv_info) if (ret) { dev_err(&hif_dev->udev->dev, "ath9k_htc: Unable to allocate URBs\n"); - goto err_fw_download; + return ret; } return 0; - -err_fw_download: - release_firmware(hif_dev->firmware); -err_fw_req: - hif_dev->firmware = NULL; - return ret; } static void ath9k_hif_usb_dev_deinit(struct hif_device_usb *hif_dev) { ath9k_hif_usb_dealloc_urbs(hif_dev); - if (hif_dev->firmware) - release_firmware(hif_dev->firmware); +} + +/* + * If initialization fails or the FW cannot be retrieved, + * detach the device. + */ +static void ath9k_hif_usb_firmware_fail(struct hif_device_usb *hif_dev) +{ + struct device *parent = hif_dev->udev->dev.parent; + + complete(&hif_dev->fw_done); + + if (parent) + device_lock(parent); + + device_release_driver(&hif_dev->udev->dev); + + if (parent) + device_unlock(parent); +} + +static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context) +{ + struct hif_device_usb *hif_dev = context; + int ret; + + if (!fw) { + dev_err(&hif_dev->udev->dev, + "ath9k_htc: Failed to get firmware %s\n", + hif_dev->fw_name); + goto err_fw; + } + + hif_dev->htc_handle = ath9k_htc_hw_alloc(hif_dev, &hif_usb, + &hif_dev->udev->dev); + if (hif_dev->htc_handle == NULL) { + goto err_fw; + } + + hif_dev->firmware = fw; + + /* Proceed with initialization */ + + ret = ath9k_hif_usb_dev_init(hif_dev); + if (ret) + goto err_dev_init; + + ret = ath9k_htc_hw_init(hif_dev->htc_handle, + &hif_dev->interface->dev, + hif_dev->usb_device_id->idProduct, + hif_dev->udev->product, + hif_dev->usb_device_id->driver_info); + if (ret) { + ret = -EINVAL; + goto err_htc_hw_init; + } + + complete(&hif_dev->fw_done); + + return; + +err_htc_hw_init: + ath9k_hif_usb_dev_deinit(hif_dev); +err_dev_init: + ath9k_htc_hw_free(hif_dev->htc_handle); + release_firmware(fw); + hif_dev->firmware = NULL; +err_fw: + ath9k_hif_usb_firmware_fail(hif_dev); } /* @@ -1155,20 +1205,16 @@ static int ath9k_hif_usb_probe(struct usb_interface *interface, } usb_get_dev(udev); + hif_dev->udev = udev; hif_dev->interface = interface; - hif_dev->device_id = id->idProduct; + hif_dev->usb_device_id = id; #ifdef CONFIG_PM udev->reset_resume = 1; #endif usb_set_intfdata(interface, hif_dev); - hif_dev->htc_handle = ath9k_htc_hw_alloc(hif_dev, &hif_usb, - &hif_dev->udev->dev); - if (hif_dev->htc_handle == NULL) { - ret = -ENOMEM; - goto err_htc_hw_alloc; - } + init_completion(&hif_dev->fw_done); /* Find out which firmware to load */ @@ -1177,29 +1223,22 @@ static int ath9k_hif_usb_probe(struct usb_interface *interface, else hif_dev->fw_name = FIRMWARE_AR9271; - ret = ath9k_hif_usb_dev_init(hif_dev, id->driver_info); - if (ret) { - ret = -EINVAL; - goto err_hif_init_usb; - } - - ret = ath9k_htc_hw_init(hif_dev->htc_handle, - &interface->dev, hif_dev->device_id, - hif_dev->udev->product, id->driver_info); + ret = request_firmware_nowait(THIS_MODULE, true, hif_dev->fw_name, + &hif_dev->udev->dev, GFP_KERNEL, + hif_dev, ath9k_hif_usb_firmware_cb); if (ret) { - ret = -EINVAL; - goto err_htc_hw_init; + dev_err(&hif_dev->udev->dev, + "ath9k_htc: Async request for firmware %s failed\n", + hif_dev->fw_name); + goto err_fw_req; } - dev_info(&hif_dev->udev->dev, "ath9k_htc: USB layer initialized\n"); + dev_info(&hif_dev->udev->dev, "ath9k_htc: Firmware %s requested\n", + hif_dev->fw_name); return 0; -err_htc_hw_init: - ath9k_hif_usb_dev_deinit(hif_dev); -err_hif_init_usb: - ath9k_htc_hw_free(hif_dev->htc_handle); -err_htc_hw_alloc: +err_fw_req: usb_set_intfdata(interface, NULL); kfree(hif_dev); usb_put_dev(udev); @@ -1234,9 +1273,15 @@ static void ath9k_hif_usb_disconnect(struct usb_interface *interface) if (!hif_dev) return; - ath9k_htc_hw_deinit(hif_dev->htc_handle, unplugged); - ath9k_htc_hw_free(hif_dev->htc_handle); - ath9k_hif_usb_dev_deinit(hif_dev); + wait_for_completion(&hif_dev->fw_done); + + if (hif_dev->firmware) { + ath9k_htc_hw_deinit(hif_dev->htc_handle, unplugged); + ath9k_htc_hw_free(hif_dev->htc_handle); + ath9k_hif_usb_dev_deinit(hif_dev); + release_firmware(hif_dev->firmware); + } + usb_set_intfdata(interface, NULL); if (!unplugged && (hif_dev->flags & HIF_USB_START)) @@ -1276,8 +1321,7 @@ static int ath9k_hif_usb_resume(struct usb_interface *interface) return ret; if (hif_dev->firmware) { - ret = ath9k_hif_usb_download_fw(hif_dev, - htc_handle->drv_priv->ah->hw_version.usbdev); + ret = ath9k_hif_usb_download_fw(hif_dev); if (ret) goto fail_resume; } else { diff --git a/drivers/net/wireless/ath/ath9k/hif_usb.h b/drivers/net/wireless/ath/ath9k/hif_usb.h index 794f63094e5d..487ff658b4c1 100644 --- a/drivers/net/wireless/ath/ath9k/hif_usb.h +++ b/drivers/net/wireless/ath/ath9k/hif_usb.h @@ -87,10 +87,11 @@ struct cmd_buf { #define HIF_USB_START BIT(0) struct hif_device_usb { - u16 device_id; struct usb_device *udev; struct usb_interface *interface; + const struct usb_device_id *usb_device_id; const struct firmware *firmware; + struct completion fw_done; struct htc_target *htc_handle; struct hif_usb_tx tx; struct usb_anchor regout_submitted; |