path: root/drivers/media/dvb/bt8xx/dst.c

/*
    Frontend-driver for TwinHan DST Frontend

    Copyright (C) 2003 Jamie Honan

    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.

*/

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/delay.h>
#include <asm/div64.h>

#include "dvb_frontend.h"
#include "dst_priv.h"
#include "dst.h"

struct dst_state {

	struct i2c_adapter* i2c;

	struct bt878* bt;

	struct dvb_frontend_ops ops;

	/* configuration settings */
	const struct dst_config* config;

	struct dvb_frontend frontend;

	/* private demodulator data */
	u8 tx_tuna[10];
	u8 rx_tuna[10];
	u8 rxbuffer[10];
	u8 diseq_flags;
	u8 dst_type;
	u32 type_flags;
	u32 frequency;		/* intermediate frequency in kHz for QPSK */
	fe_spectral_inversion_t inversion;
	u32 symbol_rate;	/* symbol rate in Symbols per second */
	fe_code_rate_t fec;
	fe_sec_voltage_t voltage;
	fe_sec_tone_mode_t tone;
	u32 decode_freq;
	u8 decode_lock;
	u16 decode_strength;
	u16 decode_snr;
	unsigned long cur_jiff;
	u8 k22;
	fe_bandwidth_t bandwidth;
};

static unsigned int dst_verbose = 0;
module_param(dst_verbose, int, 0644);
MODULE_PARM_DESC(dst_verbose, "verbose startup messages, default is 1 (yes)");
static unsigned int dst_debug = 0;
module_param(dst_debug, int, 0644);
MODULE_PARM_DESC(dst_debug, "debug messages, default is 0 (no)");

#define dprintk	if (dst_debug) printk

#define DST_TYPE_IS_SAT		0
#define DST_TYPE_IS_TERR	1
#define DST_TYPE_IS_CABLE	2

#define DST_TYPE_HAS_NEWTUNE	1
#define DST_TYPE_HAS_TS204	2
#define DST_TYPE_HAS_SYMDIV	4

#define HAS_LOCK	1
#define ATTEMPT_TUNE	2
#define HAS_POWER	4

static void dst_packsize(struct dst_state* state, int psize)
{
	union dst_gpio_packet bits;

	bits.psize = psize;
	bt878_device_control(state->bt, DST_IG_TS, &bits);
}

static int dst_gpio_outb(struct dst_state* state, u32 mask, u32 enbb, u32 outhigh)
{
	union dst_gpio_packet enb;
	union dst_gpio_packet bits;
	int err;

	enb.enb.mask = mask;
	enb.enb.enable = enbb;
	if ((err = bt878_device_control(state->bt, DST_IG_ENABLE, &enb)) < 0) {
		dprintk("%s: dst_gpio_enb error (err == %i, mask == 0x%02x, enb == 0x%02x)\n", __FUNCTION__, err, mask, enbb);
		return -EREMOTEIO;
	}

	/* because complete disabling means no output, no need to do output packet */
	if (enbb == 0)
		return 0;

	bits.outp.mask = enbb;
	bits.outp.highvals = outhigh;

	if ((err = bt878_device_control(state->bt, DST_IG_WRITE, &bits)) < 0) {
		dprintk("%s: dst_gpio_outb error (err == %i, enbb == 0x%02x, outhigh == 0x%02x)\n", __FUNCTION__, err, enbb, outhigh);
		return -EREMOTEIO;
	}
	return 0;
}

static int dst_gpio_inb(struct dst_state *state, u8 * result)
{
	union dst_gpio_packet rd_packet;
	int err;

	*result = 0;

	if ((err = bt878_device_control(state->bt, DST_IG_READ, &rd_packet)) < 0) {
		dprintk("%s: dst_gpio_inb error (err == %i)\n", __FUNCTION__, err);
		return -EREMOTEIO;
	}

	*result = (u8) rd_packet.rd.value;
	return 0;
}

#define DST_I2C_ENABLE	1
#define DST_8820	2

static int dst_reset8820(struct dst_state *state)
{
	int