From: H Hartley Sweeten Date: Mon, 20 May 2013 21:29:39 +0000 (-0700) Subject: staging: comedi: usbdux: consolidate the firmware upload X-Git-Tag: firefly_0821_release~176^2~5845^2~531 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=4bf6bfe3c8ae4d41c2bb3784981ba069c80ef55e;p=firefly-linux-kernel-4.4.55.git staging: comedi: usbdux: consolidate the firmware upload Absorb the usbdux_stop(), usbdux_upload(), and usbdux_start() functions into firmware_upload(). Each of them just do a usb_control_msg() to the device and output an error message if it fails. A similar message is also output by firmware_upload() so the extra messages are redundant. We can also share the malloc'ed local buffer needed for the usb_control_msg(). Signed-off-by: H Hartley Sweeten Cc Ian Abbott Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/comedi/drivers/usbdux.c b/drivers/staging/comedi/drivers/usbdux.c index cb63c77cc131..405a34514903 100644 --- a/drivers/staging/comedi/drivers/usbdux.c +++ b/drivers/staging/comedi/drivers/usbdux.c @@ -722,154 +722,80 @@ static void usbduxsub_ao_isoc_irq(struct urb *urb) } } -static int usbduxsub_start(struct usbduxsub *usbduxsub) -{ - int errcode = 0; - uint8_t *local_transfer_buffer; - - local_transfer_buffer = kmalloc(1, GFP_KERNEL); - if (!local_transfer_buffer) - return -ENOMEM; - - /* 7f92 to zero */ - *local_transfer_buffer = 0; - errcode = usb_control_msg(usbduxsub->usbdev, - /* create a pipe for a control transfer */ - usb_sndctrlpipe(usbduxsub->usbdev, 0), - /* bRequest, "Firmware" */ - USBDUXSUB_FIRMWARE, - /* bmRequestType */ - VENDOR_DIR_OUT, - /* Value */ - USBDUXSUB_CPUCS, - /* Index */ - 0x0000, - /* address of the transfer buffer */ - local_transfer_buffer, - /* Length */ - 1, - /* Timeout */ - BULK_TIMEOUT); - if (errcode < 0) - dev_err(&usbduxsub->interface->dev, - "comedi_: control msg failed (start)\n"); - - kfree(local_transfer_buffer); - return errcode; -} - -static int usbduxsub_stop(struct usbduxsub *usbduxsub) -{ - int errcode = 0; - uint8_t *local_transfer_buffer; - - local_transfer_buffer = kmalloc(1, GFP_KERNEL); - if (!local_transfer_buffer) - return -ENOMEM; - - /* 7f92 to one */ - *local_transfer_buffer = 1; - errcode = usb_control_msg(usbduxsub->usbdev, - usb_sndctrlpipe(usbduxsub->usbdev, 0), - /* bRequest, "Firmware" */ - USBDUXSUB_FIRMWARE, - /* bmRequestType */ - VENDOR_DIR_OUT, - /* Value */ - USBDUXSUB_CPUCS, - /* Index */ - 0x0000, local_transfer_buffer, - /* Length */ - 1, - /* Timeout */ - BULK_TIMEOUT); - if (errcode < 0) - dev_err(&usbduxsub->interface->dev, - "comedi_: control msg failed (stop)\n"); - - kfree(local_transfer_buffer); - return errcode; -} - -static int usbduxsub_upload(struct usbduxsub *usbduxsub, - uint8_t *local_transfer_buffer, - unsigned int start_addr, unsigned int len) -{ - int errcode; - - errcode = usb_control_msg(usbduxsub->usbdev, - usb_sndctrlpipe(usbduxsub->usbdev, 0), - /* brequest, firmware */ - USBDUXSUB_FIRMWARE, - /* bmRequestType */ - VENDOR_DIR_OUT, - /* value */ - start_addr, - /* index */ - 0x0000, - /* our local safe buffer */ - local_transfer_buffer, - /* length */ - len, - /* timeout */ - BULK_TIMEOUT); - dev_dbg(&usbduxsub->interface->dev, "comedi_: result=%d\n", errcode); - if (errcode < 0) { - dev_err(&usbduxsub->interface->dev, "comedi_: upload failed\n"); - return errcode; - } - return 0; -} - #define FIRMWARE_MAX_LEN 0x2000 static int firmware_upload(struct usbduxsub *usbduxsub, - const u8 *firmware_binary, int size_firmware) + const u8 *data, int size) { + struct usb_device *usb = usbduxsub->usbdev; + uint8_t *buf; + uint8_t *tmp; int ret; - uint8_t *fw_buf; - if (!firmware_binary) + if (!data) return 0; - if (size_firmware > FIRMWARE_MAX_LEN) { + if (size > FIRMWARE_MAX_LEN) { dev_err(&usbduxsub->interface->dev, "usbdux firmware binary it too large for FX2.\n"); return -ENOMEM; } /* we generate a local buffer for the firmware */ - fw_buf = kmemdup(firmware_binary, size_firmware, GFP_KERNEL); - if (!fw_buf) { - dev_err(&usbduxsub->interface->dev, - "comedi_: mem alloc for firmware failed\n"); + buf = kmemdup(data, size, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + /* we need a malloc'ed buffer for usb_control_msg() */ + tmp = kmalloc(1, GFP_KERNEL); + if (!tmp) { + kfree(buf); return -ENOMEM; } - ret = usbduxsub_stop(usbduxsub); + /* stop the current firmware on the device */ + *tmp = 1; /* 7f92 to one */ + ret = usb_control_msg(usb, usb_sndctrlpipe(usb, 0), + USBDUXSUB_FIRMWARE, + VENDOR_DIR_OUT, + USBDUXSUB_CPUCS, 0x0000, + tmp, 1, + BULK_TIMEOUT); if (ret < 0) { dev_err(&usbduxsub->interface->dev, "comedi_: can not stop firmware\n"); - kfree(fw_buf); - return ret; + goto done; } - ret = usbduxsub_upload(usbduxsub, fw_buf, 0, size_firmware); + /* upload the new firmware to the device */ + ret = usb_control_msg(usb, usb_sndctrlpipe(usb, 0), + USBDUXSUB_FIRMWARE, + VENDOR_DIR_OUT, + 0, 0x0000, + buf, size, + BULK_TIMEOUT); if (ret < 0) { dev_err(&usbduxsub->interface->dev, "comedi_: firmware upload failed\n"); - kfree(fw_buf); - return ret; + goto done; } - ret = usbduxsub_start(usbduxsub); - if (ret < 0) { + + /* start the new firmware on the device */ + *tmp = 0; /* 7f92 to zero */ + ret = usb_control_msg(usb, usb_sndctrlpipe(usb, 0), + USBDUXSUB_FIRMWARE, + VENDOR_DIR_OUT, + USBDUXSUB_CPUCS, 0x0000, + tmp, 1, + BULK_TIMEOUT); + if (ret < 0) dev_err(&usbduxsub->interface->dev, "comedi_: can not start firmware\n"); - kfree(fw_buf); - return ret; - } - kfree(fw_buf); - return 0; + +done: + kfree(tmp); + kfree(buf); + return ret; } static int usbduxsub_submit_inurbs(struct usbduxsub *usbduxsub)