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/* dvb-usb-firmware.c is part of the DVB USB library.
*
* Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@desy.de)
* see dvb-usb-init.c for copyright information.
*
* This file contains functions for downloading the firmware to Cypress FX 1 and 2 based devices.
*
* FIXME: This part does actually not belong to dvb-usb, but to the usb-subsystem.
*/
#include "dvb-usb-common.h"
#include <linux/firmware.h>
#include <linux/usb.h>
struct usb_cypress_controller {
int id;
const char *name; /* name of the usb controller */
u16 cpu_cs_register; /* needs to be restarted, when the firmware has been downloaded. */
};
static struct usb_cypress_controller cypress[] = {
{ .id = CYPRESS_AN2135, .name = "Cypress AN2135", .cpu_cs_register = 0x7f92 },
{ .id = CYPRESS_AN2235, .name = "Cypress AN2235", .cpu_cs_register = 0x7f92 },
{ .id = CYPRESS_FX2, .name = "Cypress FX2", .cpu_cs_register = 0xe600 },
};
/*
* load a firmware packet to the device
*/
static int usb_cypress_writemem(struct usb_device *udev,u16 addr,u8 *data, u8 len)
{
return usb_control_msg(udev, usb_sndctrlpipe(udev,0),
0xa0, USB_TYPE_VENDOR, addr, 0x00, data, len, 5*HZ);
}
int usb_cypress_load_firmware(struct usb_device *udev, const char *filename, int type)
{
const struct firmware *fw = NULL;
u16 addr;
u8 *b,*p;
int ret = 0,i;
if ((ret = request_firmware(&fw, filename, &udev->dev)) != 0) {
err("did not find the firmware file. (%s) "
"Please see linux/Documentation/dvb/ for more details on firmware-problems.",
filename);
return ret;
}
info("downloading firmware from file '%s' to the '%s'",filename,cypress[type].name);
p = kmalloc(fw->size,GFP_KERNEL);
if (p != NULL) {
u8 reset;
/*
* you cannot use the fw->data as buffer for
* usb_control_msg, a new buffer has to be
* created
*/
memcpy(p,fw->data,fw->size);
/* stop the CPU */
reset = 1;
if ((ret = usb_cypress_writemem(udev,cypress[type].cpu_cs_register,&reset,1)) != 1)
err("could not stop the USB controller CPU.");
for(i = 0; p[i+3] == 0 && i < fw->size; ) {
b = (u8 *) &p[i];
addr = *((u16 *) &b[1]);
ret = usb_cypress_writemem(udev,addr,&b[4],b[0]);
if (ret != b[0]) {
err("error while transferring firmware "
"(transferred size: %d, block size: %d)",
ret,b[0]);
ret = -EINVAL;
break;
}
i += 5 + b[0];
}
/* length in ret */
if (ret > 0)
ret = 0;
/* restart the CPU */
reset = 0;
if (ret || usb_cypress_writemem(udev,cypress[type].cpu_cs_register,&reset,1) != 1) {
err("could not restart the USB controller CPU.");
ret = -EINVAL;
}
kfree(p);
} else {
ret = -ENOMEM;
}
release_firmware(fw);
return ret;
}
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