mirror of
https://github.com/torvalds/linux.git
synced 2024-12-23 03:11:46 +00:00
776338e121
Add generalized dvb-usb driver which supports a wide variety of devices. Signed-off-by: Patrick Boettcher <pb@linuxtv.org> Signed-off-by: Johannes Stezenbach <js@linuxtv.org> Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
101 lines
2.7 KiB
C
101 lines
2.7 KiB
C
/* 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 = cpu_to_le16( *((u16 *) &b[1]) );
|
|
|
|
deb_fw("writing to address 0x%04x (buffer: 0x%02x%02x)\n",addr,b[1],b[2]);
|
|
|
|
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;
|
|
}
|