diff options
Diffstat (limited to 'drivers/net/wireless/zd1211rw/zd_usb.c')
| -rw-r--r-- | drivers/net/wireless/zd1211rw/zd_usb.c | 50 |
1 files changed, 43 insertions, 7 deletions
diff --git a/drivers/net/wireless/zd1211rw/zd_usb.c b/drivers/net/wireless/zd1211rw/zd_usb.c index 2e89c2e3a05..06f72cbaf0a 100644 --- a/drivers/net/wireless/zd1211rw/zd_usb.c +++ b/drivers/net/wireless/zd1211rw/zd_usb.c @@ -16,6 +16,7 @@ */ #include <asm/unaligned.h> +#include <linux/kernel.h> #include <linux/init.h> #include <linux/module.h> #include <linux/firmware.h> @@ -267,6 +268,39 @@ static char *get_fw_name(char *buffer, size_t size, u8 device_type, return buffer; } +static int handle_version_mismatch(struct usb_device *udev, u8 device_type, + const struct firmware *ub_fw) +{ + const struct firmware *ur_fw = NULL; + int offset; + int r = 0; + char fw_name[128]; + + r = request_fw_file(&ur_fw, + get_fw_name(fw_name, sizeof(fw_name), device_type, "ur"), + &udev->dev); + if (r) + goto error; + + r = upload_code(udev, ur_fw->data, ur_fw->size, FW_START_OFFSET, + REBOOT); + if (r) + goto error; + + offset = ((EEPROM_REGS_OFFSET + EEPROM_REGS_SIZE) * sizeof(u16)); + r = upload_code(udev, ub_fw->data + offset, ub_fw->size - offset, + E2P_BASE_OFFSET + EEPROM_REGS_SIZE, REBOOT); + + /* At this point, the vendor driver downloads the whole firmware + * image, hacks around with version IDs, and uploads it again, + * completely overwriting the boot code. We do not do this here as + * it is not required on any tested devices, and it is suspected to + * cause problems. */ +error: + release_firmware(ur_fw); + return r; +} + static int upload_firmware(struct usb_device *udev, u8 device_type) { int r; @@ -286,15 +320,17 @@ static int upload_firmware(struct usb_device *udev, u8 device_type) fw_bcdDevice = get_word(ub_fw->data, EEPROM_REGS_OFFSET); - /* FIXME: do we have any reason to perform the kludge that the vendor - * driver does when there is a version mismatch? (their driver uploads - * different firmwares and stuff) - */ if (fw_bcdDevice != bcdDevice) { dev_info(&udev->dev, - "firmware device id %#06x and actual device id " - "%#06x differ, continuing anyway\n", - fw_bcdDevice, bcdDevice); + "firmware version %#06x and device bootcode version " + "%#06x differ\n", fw_bcdDevice, bcdDevice); + if (bcdDevice <= 0x4313) + dev_warn(&udev->dev, "device has old bootcode, please " + "report success or failure\n"); + + r = handle_version_mismatch(udev, device_type, ub_fw); + if (r) + goto error; } else { dev_dbg_f(&udev->dev, "firmware device id %#06x is equal to the " |