path: root/drivers/media/dvb/dvb-usb/af9005.c

/* DVB USB compliant Linux driver for the Afatech 9005
 * USB1.1 DVB-T receiver.
 *
 * Copyright (C) 2007 Luca Olivetti (luca@ventoso.org)
 *
 * Thanks to Afatech who kindly provided information.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * see Documentation/dvb/README.dvb-usb for more information
 */
#include "af9005.h"

/* debug */
int dvb_usb_af9005_debug;
module_param_named(debug, dvb_usb_af9005_debug, int, 0644);
MODULE_PARM_DESC(debug,
		 "set debugging level (1=info,xfer=2,rc=4,reg=8,i2c=16,fw=32 (or-able))."
		 DVB_USB_DEBUG_STATUS);
/* enable obnoxious led */
bool dvb_usb_af9005_led = 1;
module_param_named(led, dvb_usb_af9005_led, bool, 0644);
MODULE_PARM_DESC(led, "enable led (default: 1).");

/* eeprom dump */
static int dvb_usb_af9005_dump_eeprom;
module_param_named(dump_eeprom, dvb_usb_af9005_dump_eeprom, int, 0);
MODULE_PARM_DESC(dump_eeprom, "dump contents of the eeprom.");

DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

/* remote control decoder */
static int (*rc_decode) (struct dvb_usb_device *d, u8 *data, int len,
		u32 *event, int *state);
static void *rc_keys;
static int *rc_keys_size;

u8 regmask[8] = { 0x01, 0x03, 0x07, 0x0f, 0x1f, 0x3f, 0x7f, 0xff };

struct af9005_device_state {
	u8 sequence;
	int led_state;
};

static int af9005_generic_read_write(struct dvb_usb_device *d, u16 reg,
			      int readwrite, int type, u8 * values, int len)
{
	struct af9005_device_state *st = d->priv;
	u8 obuf[16] = { 0 };
	u8 ibuf[17] = { 0 };
	u8 command;
	int i;
	int ret;

	if (len < 1) {
		err("generic read/write, less than 1 byte. Makes no sense.");
		return -EINVAL;
	}
	if (len > 8) {
		err("generic read/write, more than 8 bytes. Not supported.");
		return -EINVAL;
	}

	obuf[0] = 14;		/* rest of buffer length low */
	obuf[1] = 0;		/* rest of buffer length high */

	obuf[2] = AF9005_REGISTER_RW;	/* register operation */
	obuf[3] = 12;		/* rest of buffer length */

	obuf[4] = st->sequence++;	/* sequence number */

	obuf[5] = (u8) (reg >> 8);	/* register address */
	obuf[6] = (u8) (reg & 0xff);

	if (type == AF9005_OFDM_REG) {
		command = AF9005_CMD_OFDM_REG;
	} else {
		command = AF9005_CMD_TUNER;
	}

	if (len > 1)
		command |=
		    AF9005_CMD_BURST | AF9005_CMD_AUTOINC | (len - 1) << 3;
	command |= readwrite;
	if (readwrite == AF9005_CMD_WRITE)
		for (i = 0; i < len; i++)
			obuf[8 + i] = values[i];
	else if (type == AF9005_TUNER_REG)
		/* read command for tuner, the first byte contains the i2c address */
		obuf[8] = values[0];
	obuf[7] = command;

	ret = dvb_usb_generic_rw(d, obuf, 16, ibuf, 17, 0);
	if (ret)
		return ret;

	/* sanity check */
	if (ibuf[2] != AF9005_REGISTER_RW_ACK) {
		err("generic read/write, wrong reply code.");
		return -EIO;
	}
	if (ibuf[3] != 0x0d) {
		err("generic read/write, wrong length in reply.");
		return -EIO;
	}
	if (ibuf[4] != obuf[4]) {
		err("generic read/write, wrong sequence in reply.");
		return -EIO;
	}
	/*
	   Windows driver doesn't check these fields, in fact sometimes
	   the register in the reply is different that what has been sent

	   if (ibuf[5] != obuf[5] || ibuf[6] != obuf[6]) {
	   err("generic read/write, wrong register in reply.");
	   return -EIO;
	   }
	   if (ibuf[7] != command) {
	   err("generic read/write wrong command in reply.");
	   return -EIO;
	   }
	 */
	if (ibuf[16] != 0x01) {
		err("generic read/write wrong status code in reply.");
		return -EIO;
	}
	if (readwrite == AF9005_CMD_READ)
		for (i = 0; i < len; i++)
			values[i] = ibuf[8 + i];

	return 0;

}

int af9005_read_ofdm_register(struct dvb_usb_device *d, u16 reg, u8 * value)
{
	int ret;
	deb_reg("read register %x ", reg);
	ret = af9005_generic_read_write(d, reg,
					AF9005_CMD_READ, AF9005_OFDM_REG,
					value, 1);
	if (ret)
		deb_reg("failed\n");
	else
		deb_reg("value %x\n", *value);
	return ret;
}

int af9005_read_ofdm_registers(struct dvb_usb_device *d, u16 reg,
			       u8 * values, int len)
{
	int ret;
	deb_reg("read %d registers %x ", len, reg);
	ret = af9005_generic_read_write(d, reg,
					AF9005_CMD_READ, AF9005_OFDM_REG,
					values, len);
	if (ret)
		deb_reg("failed\n");
	else
		debug_dump(values, len, deb_reg);
	return ret;
}

int af9005_write_ofdm_register(struct dvb_usb_device *d, u16 reg, u8 value)
{
	int ret;
	u8 temp = value;
	deb_reg("write register %x value %x ", reg, value);
	ret = af9005_generic_read_write(d, reg,
					AF9005_CMD_WRITE, AF9005_OFDM_REG,
					&temp, 1);
	if (ret)
		deb_reg("failed\n");
	else
		deb_reg("ok\n");
	return ret;
}

int af9005_write_ofdm_registers(struct dvb_usb_device *d, u16 reg,
				u8 * values, int len)
{
	int ret;
	deb_reg("write %d registers %x values ", len, reg);
	debug_dump(values, len, deb_reg);

	ret = af9005_generic_read_write(d, reg,
					AF9005_CMD_WRITE, AF9005_OFDM_REG,
					values, len);
	if (ret)
		deb_reg("failed