tuner-core.c

trident tm5600的linux驱动

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

#include <linux/module.h>
#include <linux/kernel.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/init.h>
#include "compat.h"
#include <linux/videodev.h>
#include <media/tuner.h>
#include <media/tuner-types.h>
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-i2c-drv-legacy.h>
#include "mt20xx.h"
#include "tda8290.h"
#include "tea5761.h"
#include "tea5767.h"
#include "tuner-xc2028.h"
#include "tuner-simple.h"
#include "tda9887.h"
#include "xc5000.h"

#define UNSET (-1U)

#define PREFIX t->i2c->driver->driver.name

/** This macro allows us to probe dynamically, avoiding static links */
#ifdef CONFIG_MEDIA_ATTACH
#define tuner_symbol_probe(FUNCTION, ARGS...) ({ \
	int __r = -EINVAL; \
	typeof(&FUNCTION) __a = symbol_request(FUNCTION); \
	if (__a) { \
		__r = (int) __a(ARGS); \
		symbol_put(FUNCTION); \
	} else { \
		printk(KERN_ERR "TUNER: Unable to find " \
				"symbol "#FUNCTION"()\n"); \
	} \
	__r; \
})

static void tuner_detach(struct dvb_frontend *fe)
{
	if (fe->ops.tuner_ops.release) {
		fe->ops.tuner_ops.release(fe);
		symbol_put_addr(fe->ops.tuner_ops.release);
	}
	if (fe->ops.analog_ops.release) {
		fe->ops.analog_ops.release(fe);
		symbol_put_addr(fe->ops.analog_ops.release);
	}
}
#else
#define tuner_symbol_probe(FUNCTION, ARGS...) ({ \
	FUNCTION(ARGS); \
})

static void tuner_detach(struct dvb_frontend *fe)
{
	if (fe->ops.tuner_ops.release)
		fe->ops.tuner_ops.release(fe);
	if (fe->ops.analog_ops.release)
		fe->ops.analog_ops.release(fe);
}
#endif

struct tuner {
	/* device */
	struct dvb_frontend fe;
	struct i2c_client   *i2c;
	struct list_head    list;
	unsigned int        using_v4l2:1;

	/* keep track of the current settings */
	v4l2_std_id         std;
	unsigned int        tv_freq;
	unsigned int        radio_freq;
	unsigned int        audmode;

	unsigned int        mode;
	unsigned int        mode_mask; /* Combination of allowable modes */

	unsigned int        type; /* chip type id */
	unsigned int        config;
	const char          *name;
};

/* standard i2c insmod options */
static unsigned short normal_i2c[] = {
#if defined(CONFIG_MEDIA_TUNER_TEA5761) || (defined(CONFIG_MEDIA_TUNER_TEA5761_MODULE) && defined(MODULE))
	0x10,
#endif
	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;
static unsigned int no_autodetect;
static unsigned int show_i2c;

/* insmod options used at runtime => read/write */
static int tuner_debug;

#define tuner_warn(fmt, arg...) do {			\
	printk(KERN_WARNING "%s %d-%04x: " fmt, PREFIX, \
	       i2c_adapter_id(t->i2c->adapter),		\
	       t->i2c->addr, ##arg);			\
	 } while (0)

#define tuner_info(fmt, arg...) do {			\
	printk(KERN_INFO "%s %d-%04x: " fmt, PREFIX,	\
	       i2c_adapter_id(t->i2c->adapter),		\
	       t->i2c->addr, ##arg);			\
	 } while (0)

#define tuner_err(fmt, arg...) do {			\
	printk(KERN_ERR "%s %d-%04x: " fmt, PREFIX,	\
	       i2c_adapter_id(t->i2c->adapter),		\
	       t->i2c->addr, ##arg);			\
	 } while (0)

#define tuner_dbg(fmt, arg...) do {				\
	if (tuner_debug)					\
		printk(KERN_DEBUG "%s %d-%04x: " fmt, PREFIX,	\
		       i2c_adapter_id(t->i2c->adapter),		\
		       t->i2c->addr, ##arg);			\
	 } while (0)

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

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

static char pal[] = "--";
static char secam[] = "--";
static char ntsc[] = "-";


module_param(addr, int, 0444);
module_param(no_autodetect, int, 0444);
module_param(show_i2c, int, 0444);
module_param_named(debug,tuner_debug, int, 0644);
module_param_string(pal, pal, sizeof(pal), 0644);
module_param_string(secam, secam, sizeof(secam), 0644);
module_param_string(ntsc, ntsc, sizeof(ntsc), 0644);
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 void fe_set_params(struct dvb_frontend *fe,
			  struct analog_parameters *params)
{
	struct dvb_tuner_ops *fe_tuner_ops = &fe->ops.tuner_ops;
	struct tuner *t = fe->analog_demod_priv;

	if (NULL == fe_tuner_ops->set_analog_params) {
		tuner_warn("Tuner frontend module has no way to set freq\n");
		return;
	}
	fe_tuner_ops->set_analog_params(fe, params);
}

static void fe_standby(struct dvb_frontend *fe)
{
	struct dvb_tuner_ops *fe_tuner_ops = &fe->ops.tuner_ops;

	if (fe_tuner_ops->sleep)
		fe_tuner_ops->sleep(fe);
}

static int fe_has_signal(struct dvb_frontend *fe)
{
	u16 strength = 0;

	if (fe->ops.tuner_ops.get_rf_strength)
		fe->ops.tuner_ops.get_rf_strength(fe, &strength);

	return strength;
}

static int fe_set_config(struct dvb_frontend *fe, void *priv_cfg)
{
	struct dvb_tuner_ops *fe_tuner_ops = &fe->ops.tuner_ops;
	struct tuner *t = fe->analog_demod_priv;

	if (fe_tuner_ops->set_config)
		return fe_tuner_ops->set_config(fe, priv_cfg);

	tuner_warn("Tuner frontend module has no way to set config\n");

	return 0;
}

static void tuner_status(struct dvb_frontend *fe);

static struct analog_demod_ops tuner_core_ops = {
	.set_params     = fe_set_params,
	.standby        = fe_standby,
	.has_signal     = fe_has_signal,
	.set_config     = fe_set_config,
	.tuner_status   = tuner_status
};

/* 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);
	struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;

	struct analog_parameters params = {
		.mode      = t->mode,
		.audmode   = t->audmode,
		.std       = t->std
	};

	if (t->type == UNSET) {
		tuner_warn ("tuner type not set\n");
		return;
	}
	if (NULL == analog_ops->set_params) {
		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]);
		/* V4L2 spec: if the freq is not possible then the closest
		   possible value should be selected */
		if (freq < tv_range[0] * 16)
			freq = tv_range[0] * 16;
		else
			freq = tv_range[1] * 16;
	}
	params.frequency = freq;

	analog_ops->set_params(&t->fe, &params);
}

static void set_radio_freq(struct i2c_client *c, unsigned int freq)
{
	struct tuner *t = i2c_get_clientdata(c);
	struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;

	struct analog_parameters params = {
		.mode      = t->mode,
		.audmode   = t->audmode,
		.std       = t->std
	};

	if (t->type == UNSET) {
		tuner_warn ("tuner type not set\n");
		return;
	}
	if (NULL == analog_ops->set_params) {
		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]);
		/* V4L2 spec: if the freq is not possible then the closest
		   possible value should be selected */
		if (freq < radio_range[0] * 16000)
			freq = radio_range[0] * 16000;
		else
			freq = radio_range[1] * 16000;
	}
	params.frequency = freq;

	analog_ops->set_params(&t->fe, &params);
}

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);
		t->radio_freq = 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);
		t->tv_freq = freq;
		break;
	default:
		tuner_dbg("freq set: unknown mode: 0x%04x!\n",t->mode);
	}
}

static void tuner_i2c_address_check(struct tuner *t)
{
	if ((t->type == UNSET || t->type == TUNER_ABSENT) ||
	    ((t->i2c->addr < 0x64) || (t->i2c->addr > 0x6f)))
		return;

	/* We already know that the XC5000 can only be located at
	 * i2c address 0x61, 0x62, 0x63 or 0x64 */
	if ((t->type == TUNER_XC5000) &&
	    ((t->i2c->addr <= 0x64)) && (t->i2c->addr >= 0x61))
		return;

	tuner_warn("====================== WARNING! ======================\n");
	tuner_warn("Support for tuners in i2c address range 0x64 thru 0x6f\n");
	tuner_warn("will soon be dropped. This message indicates that your\n");
	tuner_warn("hardware has a %s tuner at i2c address 0x%02x.\n",
		   t->name, t->i2c->addr);
	tuner_warn("To ensure continued support for your device, please\n");
	tuner_warn("send a copy of this message, along with full dmesg\n");
	tuner_warn("output to [e-mail]\n");
	tuner_warn("Please use subject line: \"obsolete tuner i2c address.\"\n");
	tuner_warn("driver: %s, addr: 0x%02x, type: %d (%s)\n",
		   t->i2c->adapter->name, t->i2c->addr, t->type, t->name);
	tuner_warn("====================== WARNING! ======================\n");
}

static struct xc5000_config xc5000_cfg;

static void set_type(struct i2c_client *c, unsigned int type,
		     unsigned int new_mode_mask, unsigned int new_config,
		     int (*tuner_callback) (void *dev, int component, int cmd, int arg))
{
	struct tuner *t = i2c_get_clientdata(c);
	struct dvb_tuner_ops *fe_tuner_ops = &t->fe.ops.tuner_ops;
	struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
	unsigned char buffer[4];

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

	t->type = type;
	t->config = new_config;
	if (tuner_callback != NULL) {
		tuner_dbg("defining GPIO callback\n");
		t->fe.callback = tuner_callback;
	}

	if (t->mode == T_UNINITIALIZED) {
		tuner_dbg ("tuner 0x%02x: called during i2c_client register by adapter's attach_inform\n", c->addr);

		return;
	}

	/* discard private data, in case set_type() was previously called */
	tuner_detach(&t->fe);
	t->fe.analog_demod_priv = NULL;

	switch (t->type) {
	case TUNER_MT2032:
		if (!dvb_attach(microtune_attach,
			   &t->fe, t->i2c->adapter, t->i2c->addr))
			goto attach_failed;
		break;
	case TUNER_PHILIPS_TDA8290:
	{
		struct tda829x_config cfg = {
			.lna_cfg        = t->config,
		};
		if (!dvb_attach(tda829x_attach, &t->fe, t->i2c->adapter,
				t->i2c->addr, &cfg))
			goto attach_failed;
		break;
	}
	case TUNER_TEA5767:
		if (!dvb_attach(tea5767_attach, &t->fe,
				t->i2c->adapter, t->i2c->addr))
			goto attach_failed;
		t->mode_mask = T_RADIO;
		break;
	case TUNER_TEA5761:
		if (!dvb_attach(tea5761_attach, &t->fe,
				t->i2c->adapter, t->i2c->addr))
			goto attach_failed;
		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);
		if (!dvb_attach(simple_tuner_attach, &t->fe,
				t->i2c->adapter, t->i2c->addr, t->type))
			goto attach_failed;
		break;
	case TUNER_PHILIPS_TD1316:
		buffer[0] = 0x0b;
		buffer[1] = 0xdc;
		buffer[2] = 0x86;
		buffer[3] = 0xa4;
		i2c_master_send(c, buffer, 4);
		if (!dvb_attach(simple_tuner_attach, &t->fe,
				t->i2c->adapter, t->i2c->addr, t->type))
			goto attach_failed;
		break;
	case TUNER_XC2028:
	{
		struct xc2028_config cfg = {
			.i2c_adap  = t->i2c->adapter,
			.i2c_addr  = t->i2c->addr,
		};
		if (!dvb_attach(xc2028_attach, &t->fe, &cfg))
			goto attach_failed;
		break;
	}
	case TUNER_TDA9887: