tuner-core.c

linux-2.6.15.6

/*
 *
 * i2c tv tuner chip device driver
 * core core, i.e. kernel interfaces, registering and so on
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/poll.h>
#include <linux/i2c.h>
#include <linux/types.h>
#include <linux/videodev.h>
#include <linux/init.h>

#include <media/tuner.h>
#include <media/audiochip.h>

#include "msp3400.h"

#define UNSET (-1U)

/* standard i2c insmod options */
static unsigned short normal_i2c[] = {
	0x42, 0x43, 0x4a, 0x4b,			/* tda8290 */
	0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
	0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
	I2C_CLIENT_END
};

I2C_CLIENT_INSMOD;

/* insmod options used at init time => read/only */
static unsigned int addr = 0;
module_param(addr, int, 0444);

static unsigned int no_autodetect = 0;
module_param(no_autodetect, int, 0444);

static unsigned int show_i2c = 0;
module_param(show_i2c, int, 0444);

/* insmod options used at runtime => read/write */
unsigned int tuner_debug = 0;
module_param(tuner_debug, int, 0644);

static unsigned int tv_range[2] = { 44, 958 };
static unsigned int radio_range[2] = { 65, 108 };

module_param_array(tv_range, int, NULL, 0644);
module_param_array(radio_range, int, NULL, 0644);

MODULE_DESCRIPTION("device driver for various TV and TV+FM radio tuners");
MODULE_AUTHOR("Ralph Metzler, Gerd Knorr, Gunther Mayer");
MODULE_LICENSE("GPL");

static struct i2c_driver driver;
static struct i2c_client client_template;

/* ---------------------------------------------------------------------- */

/* Set tuner frequency,  freq in Units of 62.5kHz = 1/16MHz */
static void set_tv_freq(struct i2c_client *c, unsigned int freq)
{
	struct tuner *t = i2c_get_clientdata(c);

	if (t->type == UNSET) {
		tuner_warn ("tuner type not set\n");
		return;
	}
	if (NULL == t->tv_freq) {
		tuner_warn ("Tuner has no way to set tv freq\n");
		return;
	}
	if (freq < tv_range[0] * 16 || freq > tv_range[1] * 16) {
		tuner_dbg ("TV freq (%d.%02d) out of range (%d-%d)\n",
			   freq / 16, freq % 16 * 100 / 16, tv_range[0],
			   tv_range[1]);
	}
	t->tv_freq(c, freq);
}

static void set_radio_freq(struct i2c_client *c, unsigned int freq)
{
	struct tuner *t = i2c_get_clientdata(c);

	if (t->type == UNSET) {
		tuner_warn ("tuner type not set\n");
		return;
	}
	if (NULL == t->radio_freq) {
		tuner_warn ("tuner has no way to set radio frequency\n");
		return;
	}
	if (freq <= radio_range[0] * 16000 || freq >= radio_range[1] * 16000) {
		tuner_dbg ("radio freq (%d.%02d) out of range (%d-%d)\n",
			   freq / 16000, freq % 16000 * 100 / 16000,
			   radio_range[0], radio_range[1]);
	}

	t->radio_freq(c, freq);
	return;
}

static void set_freq(struct i2c_client *c, unsigned long freq)
{
	struct tuner *t = i2c_get_clientdata(c);

	switch (t->mode) {
	case V4L2_TUNER_RADIO:
		tuner_dbg("radio freq set to %lu.%02lu\n",
			  freq / 16000, freq % 16000 * 100 / 16000);
		set_radio_freq(c, freq);
		break;
	case V4L2_TUNER_ANALOG_TV:
	case V4L2_TUNER_DIGITAL_TV:
		tuner_dbg("tv freq set to %lu.%02lu\n",
			  freq / 16, freq % 16 * 100 / 16);
		set_tv_freq(c, freq);
		break;
	}
	t->freq = freq;
}

static void set_type(struct i2c_client *c, unsigned int type,
		     unsigned int new_mode_mask)
{
	struct tuner *t = i2c_get_clientdata(c);
	unsigned char buffer[4];

	if (type == UNSET || type == TUNER_ABSENT) {
		tuner_dbg ("tuner 0x%02x: Tuner type absent\n",c->addr);
		return;
	}

	if (type >= tuner_count) {
		tuner_warn ("tuner 0x%02x: Tuner count greater than %d\n",c->addr,tuner_count);
		return;
	}

	/* This code detects calls by card attach_inform */
	if (NULL == t->i2c.dev.driver) {
		tuner_dbg ("tuner 0x%02x: called during i2c_client register by adapter's attach_inform\n", c->addr);

		t->type=type;
		return;
	}

	t->type = type;

	switch (t->type) {
	case TUNER_MT2032:
		microtune_init(c);
		break;
	case TUNER_PHILIPS_TDA8290:
		tda8290_init(c);
		break;
	case TUNER_TEA5767:
		if (tea5767_tuner_init(c) == EINVAL) {
			t->type = TUNER_ABSENT;
			t->mode_mask = T_UNINITIALIZED;
			return;
		}
		t->mode_mask = T_RADIO;
		break;
	case TUNER_PHILIPS_FMD1216ME_MK3:
		buffer[0] = 0x0b;
		buffer[1] = 0xdc;
		buffer[2] = 0x9c;
		buffer[3] = 0x60;
		i2c_master_send(c, buffer, 4);
		mdelay(1);
		buffer[2] = 0x86;
		buffer[3] = 0x54;
		i2c_master_send(c, buffer, 4);
		default_tuner_init(c);
		break;
	case TUNER_LG_TDVS_H062F:
		/* Set the Auxiliary Byte. */
		buffer[2] &= ~0x20;
		buffer[2] |= 0x18;
		buffer[3] = 0x20;
		i2c_master_send(c, buffer, 4);
		default_tuner_init(c);
		break;
	case TUNER_PHILIPS_TD1316:
		buffer[0] = 0x0b;
		buffer[1] = 0xdc;
		buffer[2] = 0x86;
		buffer[3] = 0xa4;
		i2c_master_send(c,buffer,4);
		default_tuner_init(c);
	default:
		default_tuner_init(c);
		break;
	}

	if (t->mode_mask == T_UNINITIALIZED)
		t->mode_mask = new_mode_mask;

	set_freq(c, t->freq);
	tuner_dbg("%s %s I2C addr 0x%02x with type %d used for 0x%02x\n",
		  c->adapter->name, c->driver->name, c->addr << 1, type,
		  t->mode_mask);
}

/*
 * This function apply tuner config to tuner specified
 * by tun_setup structure. I addr is unset, then admin status
 * and tun addr status is more precise then current status,
 * it's applied. Otherwise status and type are applied only to
 * tuner with exactly the same addr.
*/

static void set_addr(struct i2c_client *c, struct tuner_setup *tun_setup)
{
	struct tuner *t = i2c_get_clientdata(c);

	if ( t->type == UNSET && ((tun_setup->addr == ADDR_UNSET &&
		(t->mode_mask & tun_setup->mode_mask)) ||
		tun_setup->addr == c->addr)) {
			set_type(c, tun_setup->type, tun_setup->mode_mask);
	}
}

static inline int check_mode(struct tuner *t, char *cmd)
{
	if ((1 << t->mode & t->mode_mask) == 0) {
		return EINVAL;
	}

	switch (t->mode) {
	case V4L2_TUNER_RADIO:
		tuner_dbg("Cmd %s accepted for radio\n", cmd);
		break;
	case V4L2_TUNER_ANALOG_TV:
		tuner_dbg("Cmd %s accepted for analog TV\n", cmd);
		break;
	case V4L2_TUNER_DIGITAL_TV:
		tuner_dbg("Cmd %s accepted for digital TV\n", cmd);
		break;
	}
	return 0;
}

static char pal[] = "-";
module_param_string(pal, pal, sizeof(pal), 0644);
static char secam[] = "--";
module_param_string(secam, secam, sizeof(secam), 0644);

/* get more precise norm info from insmod option */
static int tuner_fixup_std(struct tuner *t)
{
	if ((t->std & V4L2_STD_PAL) == V4L2_STD_PAL) {
		switch (pal[0]) {
		case 'b':
		case 'B':
		case 'g':
		case 'G':
			tuner_dbg ("insmod fixup: PAL => PAL-BG\n");
			t->std = V4L2_STD_PAL_BG;
			break;
		case 'i':
		case 'I':
			tuner_dbg ("insmod fixup: PAL => PAL-I\n");
			t->std = V4L2_STD_PAL_I;
			break;
		case 'd':
		case 'D':
		case 'k':
		case 'K':
			tuner_dbg ("insmod fixup: PAL => PAL-DK\n");
			t->std = V4L2_STD_PAL_DK;
			break;
		case 'M':
		case 'm':
			tuner_dbg ("insmod fixup: PAL => PAL-M\n");
			t->std = V4L2_STD_PAL_M;
			break;
		case 'N':
		case 'n':
			tuner_dbg ("insmod fixup: PAL => PAL-N\n");
			t->std = V4L2_STD_PAL_N;
			break;
		case '-':
			/* default parameter, do nothing */
			break;
		default:
			tuner_warn ("pal= argument not recognised\n");
			break;
		}
	}
	if ((t->std & V4L2_STD_SECAM) == V4L2_STD_SECAM) {
		switch (secam[0]) {
		case 'd':
		case 'D':
		case 'k':
		case 'K':
			tuner_dbg ("insmod fixup: SECAM => SECAM-DK\n");
			t->std = V4L2_STD_SECAM_DK;
			break;
		case 'l':
		case 'L':
			if ((secam[1]=='C')||(secam[1]=='c')) {
				tuner_dbg ("insmod fixup: SECAM => SECAM-L'\n");
				t->std = V4L2_STD_SECAM_LC;
			} else {
				tuner_dbg ("insmod fixup: SECAM => SECAM-L\n");
				t->std = V4L2_STD_SECAM_L;
			}
			break;
		case '-':
			/* default parameter, do nothing */
			break;
		default:
			tuner_warn ("secam= argument not recognised\n");
			break;
		}
	}

	return 0;
}

/* ---------------------------------------------------------------------- */

/* static var Used only in tuner_attach and tuner_probe */
static unsigned default_mode_mask;

/* During client attach, set_type is called by adapter's attach_inform callback.
   set_type must then be completed by tuner_attach.
 */
static int tuner_attach(struct i2c_adapter *adap, int addr, int kind)
{
	struct tuner *t;

	client_template.adapter = adap;
	client_template.addr = addr;

	t = kmalloc(sizeof(struct tuner), GFP_KERNEL);
	if (NULL == t)
		return -ENOMEM;
	memset(t, 0, sizeof(struct tuner));
	memcpy(&t->i2c, &client_template, sizeof(struct i2c_client));
	i2c_set_clientdata(&t->i2c, t);
	t->type = UNSET;
	t->radio_if2 = 10700 * 1000;	/* 10.7MHz - FM radio */
	t->audmode = V4L2_TUNER_MODE_STEREO;
	t->mode_mask = T_UNINITIALIZED;

	if (show_i2c) {
		unsigned char buffer[16];
		int i,rc;

		memset(buffer, 0, sizeof(buffer));
		rc = i2c_master_recv(&t->i2c, buffer, sizeof(buffer));
		tuner_info("I2C RECV = ");
		for (i=0;i<rc;i++)
			printk("%02x ",buffer[i]);
		printk("\n");
	}
	/* TEA5767 autodetection code - only for addr = 0xc0 */
	if (!no_autodetect) {
		switch (addr) {
		case 0x42:
		case 0x43:
		case 0x4a:
		case 0x4b:
			/* If chip is not tda8290, don't register.
			   since it can be tda9887*/
			if (tda8290_probe(&t->i2c) != 0) {
				tuner_dbg("chip at addr %x is not a tda8290\n", addr);
				kfree(t);
				return 0;
			}
			break;
		case 0x60:
			if (tea5767_autodetection(&t->i2c) != EINVAL) {
				t->type = TUNER_TEA5767;
				t->mode_mask = T_RADIO;
				t->mode = T_STANDBY;
				t->freq = 87.5 * 16; /* Sets freq to FM range */
				default_mode_mask &= ~T_RADIO;

				goto register_client;
			}
			break;