/* 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/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 = DEVICE_SPECIFIC, .name = "Device specific", .cpu_cs_register = 0 },	{ .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 },};static int dvb_usb_get_hexline(const struct firmware *fw, struct hexline *hx,			       int *pos);/* * 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 usb_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;	if ((ret = usb_cypress_writemem(udev,cypress[type].cpu_cs_register,&reset,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);		return ret;	}	if (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;		}	} else		ret = -EIO;	return ret;}EXPORT_SYMBOL(usb_cypress_load_firmware);int dvb_usb_download_firmware(struct usb_device *udev, struct dvb_usb_properties *props){	int ret;	const struct firmware *fw = NULL;	if ((ret = request_firmware(&fw, props->firmware, &udev->dev)) != 0) {		err("did not find the firmware file. (%s) "			"Please see linux/Documentation/dvb/ for more details on firmware-problems. (%d)",			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;}static int dvb_usb_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 = le16_to_cpu( *((u16 *) &b[1]) );	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;}