// SPDX-License-Identifier: GPL-2.0 /* dvb-usb-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. * * FIXME: This part does actually not belong to dvb-usb, but to the usb-subsystem.
*/ #include"dvb-usb-common.h"
#include <linux/usb.h>
struct usb_cypress_controller { int id; constchar *name; /* name of the usb controller */
u16 cpu_cs_register; /* needs to be restarted, when the firmware has been downloaded. */
};
/* stop the CPU */
buf[0] = 1; if (usb_cypress_writemem(udev, cpu_cs_register, buf, 1) != 1)
err("could not stop the USB controller CPU.");
while ((ret = dvb_usb_get_hexline(fw, hx, &pos)) > 0) {
deb_fw("writing to address 0x%04x (buffer: 0x%02x %02x)\n", hx->addr, hx->len, hx->chk);
ret = usb_cypress_writemem(udev, hx->addr, hx->data, hx->len);
if (ret != hx->len) {
err("error while transferring firmware (transferred size: %d, block size: %d)",
ret, hx->len);
ret = -EINVAL; break;
}
} if (ret < 0) {
err("firmware download failed at %d with %d",pos,ret);
kfree(buf); return ret;
}
if (ret == 0) { /* restart the CPU */
buf[0] = 0; if (usb_cypress_writemem(udev, cpu_cs_register, buf, 1) != 1) {
err("could not restart the USB controller CPU.");
ret = -EINVAL;
}
} else
ret = -EIO;
int dvb_usb_download_firmware(struct usb_device *udev, conststruct dvb_usb_device_properties *props)
{ int ret; conststruct firmware *fw = NULL;
if ((ret = request_firmware(&fw, props->firmware, &udev->dev)) != 0) {
err("did not find the firmware file '%s' (status %d). You can use /scripts/get_dvb_firmware to get the firmware",
props->firmware,ret); return ret;
}
info("downloading firmware from file '%s'",props->firmware);
switch (props->usb_ctrl) { case CYPRESS_AN2135: case CYPRESS_AN2235: case CYPRESS_FX2:
ret = usb_cypress_load_firmware(udev, fw, props->usb_ctrl); break; case DEVICE_SPECIFIC: if (props->download_firmware)
ret = props->download_firmware(udev,fw); else {
err("BUG: driver didn't specified a download_firmware-callback, although it claims to have a DEVICE_SPECIFIC one.");
ret = -EINVAL;
} break; default:
ret = -EINVAL; break;
}
release_firmware(fw); return ret;
}
int dvb_usb_get_hexline(conststruct 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];
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