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/* cypress_firmware.c is part of the DVB USB library.
*
* Copyright (C) 2004-6 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.
*
*/
#include "dvb_usb.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);
}
int usbv2_cypress_load_firmware(struct usb_device *udev,
const struct firmware *fw, int type)
{
struct hexline hx;
u8 reset;
int ret, pos = 0;
/* stop the CPU */
reset = 1;
ret = usb_cypress_writemem(udev, cypress[type].cs_reg, &reset, 1);
if (ret != 1)
pr_err("%s: could not stop the USB controller CPU",
KBUILD_MODNAME);
while ((ret = dvb_usbv2_get_hexline(fw, &hx, &pos)) > 0) {
pr_debug("%s: writing to address %04x (buffer: %02x %02x)\n",
__func__, hx.addr, hx.len, hx.chk);
ret = usb_cypress_writemem(udev, hx.addr, hx.data, hx.len);
if (ret != hx.len) {
pr_err("%s: error while transferring firmware " \
"(transferred size=%d, block size=%d)",
KBUILD_MODNAME, ret, hx.len);
ret = -EINVAL;
break;
}
}
if (ret < 0) {
pr_err("%s: firmware download failed at %d with %d",
KBUILD_MODNAME, pos, ret);
return ret;
}
if (ret == 0) {
/* restart the CPU */
reset = 0;
if (ret || usb_cypress_writemem(
udev, cypress[type].cs_reg, &reset, 1) != 1) {
pr_err("%s: could not restart the USB controller CPU",
KBUILD_MODNAME);
ret = -EINVAL;
}
} else
ret = -EIO;
return ret;
}
EXPORT_SYMBOL(usbv2_cypress_load_firmware);
int dvb_usbv2_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);
/*
hx->len -= 2;
data_offs += 2;
*/
}
memcpy(hx->data, &b[data_offs], hx->len);
hx->chk = b[hx->len + data_offs];
*pos += hx->len + 5;
return *pos;
}
EXPORT_SYMBOL(dvb_usbv2_get_hexline);
MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
MODULE_DESCRIPTION("Cypress firmware download");
MODULE_LICENSE("GPL");
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