131 lines
3 KiB
C
131 lines
3 KiB
C
/* cypress_firmware.c is part of the DVB USB library.
|
|
*
|
|
* Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@posteo.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.
|
|
*
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/usb.h>
|
|
#include <linux/firmware.h>
|
|
#include "cypress_firmware.h"
|
|
|
|
struct usb_cypress_controller {
|
|
u8 id;
|
|
const char *name; /* name of the usb controller */
|
|
u16 cs_reg; /* needs to be restarted,
|
|
* when the firmware has been downloaded */
|
|
};
|
|
|
|
static const struct usb_cypress_controller cypress[] = {
|
|
{ .id = CYPRESS_AN2135, .name = "Cypress AN2135", .cs_reg = 0x7f92 },
|
|
{ .id = CYPRESS_AN2235, .name = "Cypress AN2235", .cs_reg = 0x7f92 },
|
|
{ .id = CYPRESS_FX2, .name = "Cypress FX2", .cs_reg = 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, 5000);
|
|
}
|
|
|
|
static int cypress_get_hexline(const struct firmware *fw,
|
|
struct hexline *hx, int *pos)
|
|
{
|
|
u8 *b = (u8 *) &fw->data[*pos];
|
|
int data_offs = 4;
|
|
|
|
if (*pos >= fw->size)
|
|
return 0;
|
|
|
|
memset(hx, 0, sizeof(struct hexline));
|
|
hx->len = b[0];
|
|
|
|
if ((*pos + hx->len + 4) >= fw->size)
|
|
return -EINVAL;
|
|
|
|
hx->addr = b[1] | (b[2] << 8);
|
|
hx->type = b[3];
|
|
|
|
if (hx->type == 0x04) {
|
|
/* b[4] and b[5] are the Extended linear address record data
|
|
* field */
|
|
hx->addr |= (b[4] << 24) | (b[5] << 16);
|
|
}
|
|
|
|
memcpy(hx->data, &b[data_offs], hx->len);
|
|
hx->chk = b[hx->len + data_offs];
|
|
*pos += hx->len + 5;
|
|
|
|
return *pos;
|
|
}
|
|
|
|
int cypress_load_firmware(struct usb_device *udev,
|
|
const struct firmware *fw, int type)
|
|
{
|
|
struct hexline *hx;
|
|
int ret, pos = 0;
|
|
|
|
hx = kmalloc(sizeof(*hx), GFP_KERNEL);
|
|
if (!hx)
|
|
return -ENOMEM;
|
|
|
|
/* stop the CPU */
|
|
hx->data[0] = 1;
|
|
ret = usb_cypress_writemem(udev, cypress[type].cs_reg, hx->data, 1);
|
|
if (ret != 1) {
|
|
dev_err(&udev->dev, "%s: CPU stop failed=%d\n",
|
|
KBUILD_MODNAME, ret);
|
|
ret = -EIO;
|
|
goto err_kfree;
|
|
}
|
|
|
|
/* write firmware to memory */
|
|
for (;;) {
|
|
ret = cypress_get_hexline(fw, hx, &pos);
|
|
if (ret < 0)
|
|
goto err_kfree;
|
|
else if (ret == 0)
|
|
break;
|
|
|
|
ret = usb_cypress_writemem(udev, hx->addr, hx->data, hx->len);
|
|
if (ret < 0) {
|
|
goto err_kfree;
|
|
} else if (ret != hx->len) {
|
|
dev_err(&udev->dev,
|
|
"%s: error while transferring firmware (transferred size=%d, block size=%d)\n",
|
|
KBUILD_MODNAME, ret, hx->len);
|
|
ret = -EIO;
|
|
goto err_kfree;
|
|
}
|
|
}
|
|
|
|
/* start the CPU */
|
|
hx->data[0] = 0;
|
|
ret = usb_cypress_writemem(udev, cypress[type].cs_reg, hx->data, 1);
|
|
if (ret != 1) {
|
|
dev_err(&udev->dev, "%s: CPU start failed=%d\n",
|
|
KBUILD_MODNAME, ret);
|
|
ret = -EIO;
|
|
goto err_kfree;
|
|
}
|
|
|
|
ret = 0;
|
|
err_kfree:
|
|
kfree(hx);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(cypress_load_firmware);
|
|
|
|
MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
|
|
MODULE_DESCRIPTION("Cypress firmware download");
|
|
MODULE_LICENSE("GPL");
|