1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
88 lines
2.2 KiB
C
88 lines
2.2 KiB
C
/*
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* dvb-dibusb-firmware.c is part of the driver for mobile USB Budget DVB-T devices
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* based on reference design made by DiBcom (http://www.dibcom.fr/)
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*
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* Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@desy.de)
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*
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* see dvb-dibusb-core.c for more copyright details.
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*
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* This file contains functions for downloading the firmware to the device.
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*/
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#include "dvb-dibusb.h"
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#include <linux/firmware.h>
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#include <linux/usb.h>
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/*
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* load a firmware packet to the device
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*/
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static int dibusb_writemem(struct usb_device *udev,u16 addr,u8 *data, u8 len)
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{
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return usb_control_msg(udev, usb_sndctrlpipe(udev,0),
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0xa0, USB_TYPE_VENDOR, addr, 0x00, data, len, 5000);
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}
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int dibusb_loadfirmware(struct usb_device *udev, struct dibusb_usb_device *dibdev)
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{
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const struct firmware *fw = NULL;
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u16 addr;
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u8 *b,*p;
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int ret = 0,i;
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if ((ret = request_firmware(&fw, dibdev->dev_cl->firmware, &udev->dev)) != 0) {
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err("did not find the firmware file. (%s) "
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"Please see linux/Documentation/dvb/ for more details on firmware-problems.",
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dibdev->dev_cl->firmware);
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return ret;
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}
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info("downloading firmware from file '%s'.",dibdev->dev_cl->firmware);
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p = kmalloc(fw->size,GFP_KERNEL);
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if (p != NULL) {
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u8 reset;
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/*
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* you cannot use the fw->data as buffer for
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* usb_control_msg, a new buffer has to be
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* created
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*/
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memcpy(p,fw->data,fw->size);
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/* stop the CPU */
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reset = 1;
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if ((ret = dibusb_writemem(udev,dibdev->dev_cl->usb_ctrl->cpu_cs_register,&reset,1)) != 1)
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err("could not stop the USB controller CPU.");
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for(i = 0; p[i+3] == 0 && i < fw->size; ) {
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b = (u8 *) &p[i];
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addr = *((u16 *) &b[1]);
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ret = dibusb_writemem(udev,addr,&b[4],b[0]);
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if (ret != b[0]) {
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err("error while transferring firmware "
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"(transferred size: %d, block size: %d)",
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ret,b[0]);
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ret = -EINVAL;
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break;
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}
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i += 5 + b[0];
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}
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/* length in ret */
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if (ret > 0)
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ret = 0;
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/* restart the CPU */
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reset = 0;
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if (ret || dibusb_writemem(udev,dibdev->dev_cl->usb_ctrl->cpu_cs_register,&reset,1) != 1) {
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err("could not restart the USB controller CPU.");
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ret = -EINVAL;
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}
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kfree(p);
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} else {
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ret = -ENOMEM;
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}
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release_firmware(fw);
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return ret;
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}
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