[deliverable/linux.git] / drivers / media / video / cx88 / cx88-i2c.c

/*

    cx88-i2c.c  --  all the i2c code is here

    Copyright (C) 1996,97,98 Ralph  Metzler (rjkm@thp.uni-koeln.de)
			   & Marcus Metzler (mocm@thp.uni-koeln.de)
    (c) 2002 Yurij Sysoev <yurij@naturesoft.net>
    (c) 1999-2003 Gerd Knorr <kraxel@bytesex.org>

    (c) 2005 Mauro Carvalho Chehab <mchehab@infradead.org>
	- Multituner support and i2c address binding

    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/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>

#include <asm/io.h>

#include "cx88.h"
#include <media/v4l2-common.h>

static unsigned int i2c_debug = 0;
module_param(i2c_debug, int, 0644);
MODULE_PARM_DESC(i2c_debug,"enable debug messages [i2c]");

static unsigned int i2c_scan = 0;
module_param(i2c_scan, int, 0444);
MODULE_PARM_DESC(i2c_scan,"scan i2c bus at insmod time");

static unsigned int i2c_udelay = 5;
module_param(i2c_udelay, int, 0644);
MODULE_PARM_DESC(i2c_udelay,"i2c delay at insmod time, in usecs "
		"(should be 5 or higher). Lower value means higher bus speed.");

#define dprintk(level,fmt, arg...)	if (i2c_debug >= level) \
	printk(KERN_DEBUG "%s: " fmt, core->name , ## arg)

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

static void cx8800_bit_setscl(void *data, int state)
{
	struct cx88_core *core = data;

	if (state)
		core->i2c_state |= 0x02;
	else
		core->i2c_state &= ~0x02;
	cx_write(MO_I2C, core->i2c_state);
	cx_read(MO_I2C);
}

static void cx8800_bit_setsda(void *data, int state)
{
	struct cx88_core *core = data;

	if (state)
		core->i2c_state |= 0x01;
	else
		core->i2c_state &= ~0x01;
	cx_write(MO_I2C, core->i2c_state);
	cx_read(MO_I2C);
}

static int cx8800_bit_getscl(void *data)
{
	struct cx88_core *core = data;
	u32 state;

	state = cx_read(MO_I2C);
	return state & 0x02 ? 1 : 0;
}

static int cx8800_bit_getsda(void *data)
{
	struct cx88_core *core = data;
	u32 state;

	state = cx_read(MO_I2C);
	return state & 0x01;
}

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

static int attach_inform(struct i2c_client *client)
{
	struct tuner_setup tun_setup;
	struct cx88_core *core = i2c_get_adapdata(client->adapter);

	dprintk(1, "%s i2c attach [addr=0x%x,client=%s]\n",
		client->driver->driver.name, client->addr, client->name);
	if (!client->driver->command)
		return 0;

	if (core->radio_type != UNSET) {
		if ((core->radio_addr==ADDR_UNSET)||(core->radio_addr==client->addr)) {
			tun_setup.mode_mask = T_RADIO;
			tun_setup.type = core->radio_type;
			tun_setup.addr = core->radio_addr;

			client->driver->command (client, TUNER_SET_TYPE_ADDR, &tun_setup);
		}
	}
	if (core->tuner_type != UNSET) {
		if ((core->tuner_addr==ADDR_UNSET)||(core->tuner_addr==client->addr)) {

			tun_setup.mode_mask = T_ANALOG_TV;
			tun_setup.type = core->tuner_type;
			tun_setup.addr = core->tuner_addr;

			client->driver->command (client,TUNER_SET_TYPE_ADDR, &tun_setup);
		}
	}

	if (core->tda9887_conf)
		client->driver->command(client, TDA9887_SET_CONFIG, &core->tda9887_conf);
	return 0;
}

static int detach_inform(struct i2c_client *client)
{
	struct cx88_core *core = i2c_get_adapdata(client->adapter);

	dprintk(1, "i2c detach [client=%s]\n", client->name);
	return 0;
}

void cx88_call_i2c_clients(struct cx88_core *core, unsigned int cmd, void *arg)
{
	if (0 != core->i2c_rc)
		return;

#if defined(CONFIG_VIDEO_BUF_DVB) || defined(CONFIG_VIDEO_BUF_DVB_MODULE)
	if ( (core->dvbdev) && (core->dvbdev->dvb.frontend) ) {
		if (core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl)
			core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl(core->dvbdev->dvb.frontend, 1);

		i2c_clients_command(&core->i2c_adap, cmd, arg);

		if (core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl)
			core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl(core->dvbdev->dvb.frontend, 0);
	} else
#endif
		i2c_clients_command(&core->i2c_adap, cmd, arg);
}

static struct i2c_algo_bit_data cx8800_i2c_algo_template = {
	.setsda  = cx8800_bit_setsda,
	.setscl  = cx8800_bit_setscl,
	.getsda  = cx8800_bit_getsda,
	.getscl  = cx8800_bit_getscl,
	.udelay  = 16,
	.timeout = 200,
};

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

static struct i2c_adapter cx8800_i2c_adap_template = {
	.name              = "cx2388x",
	.owner             = THIS_MODULE,
	.id                = I2C_HW_B_CX2388x,
	.client_register   = attach_inform,
	.client_unregister = detach_inform,
};

static struct i2c_client cx8800_i2c_client_template = {
	.name	= "cx88xx internal",
};

static char *i2c_devs[128] = {
	[ 0x1c >> 1 ] = "lgdt330x",
	[ 0x86 >> 1 ] = "tda9887/cx22702",
	[ 0xa0 >> 1 ] = "eeprom",
	[ 0xc0 >> 1 ] = "tuner (analog)",
	[ 0xc2 >> 1 ] = "tuner (analog/dvb)",
};

static void do_i2c_scan(char *name, struct i2c_client *c)
{
	unsigned char buf;
	int i,rc;

	for (i = 0; i < 128; i++) {
		c->addr = i;
		rc = i2c_master_recv(c,&buf,0);
		if (rc < 0)
			continue;
		printk("%s: i2c scan: found device @ 0x%x  [%s]\n",
		       name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
	}
}

/* init + register i2c algo-bit adapter */
int cx88_i2c_init(struct cx88_core *core, struct pci_dev *pci)
{
	/* Prevents usage of invalid delay values */
	if (i2c_udelay<5)
		i2c_udelay=5;
	cx8800_i2c_algo_template.udelay=i2c_udelay;

	memcpy(&core->i2c_adap, &cx8800_i2c_adap_template,
	       sizeof(core->i2c_adap));
	memcpy(&core->i2c_algo, &cx8800_i2c_algo_template,
	       sizeof(core->i2c_algo));
	memcpy(&core->i2c_client, &cx8800_i2c_client_template,
	       sizeof(core->i2c_client));

	if (core->tuner_type != TUNER_ABSENT)
		core->i2c_adap.class |= I2C_CLASS_TV_ANALOG;
	if (cx88_boards[core->board].mpeg & CX88_MPEG_DVB)
		core->i2c_adap.class |= I2C_CLASS_TV_DIGITAL;

	core->i2c_adap.dev.parent = &pci->dev;
	strlcpy(core->i2c_adap.name,core->name,sizeof(core->i2c_adap.name));
	core->i2c_algo.data = core;
	i2c_set_adapdata(&core->i2c_adap,core);
	core->i2c_adap.algo_data = &core->i2c_algo;
	core->i2c_client.adapter = &core->i2c_adap;

	cx8800_bit_setscl(core,1);
	cx8800_bit_setsda(core,1);

	core->i2c_rc = i2c_bit_add_bus(&core->i2c_adap);
	if (0 == core->i2c_rc) {
		dprintk(1, "i2c register ok\n");
		if (i2c_scan)
			do_i2c_scan(core->name,&core->i2c_client);
	} else
		printk("%s: i2c register FAILED\n", core->name);
	return core->i2c_rc;
}

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

EXPORT_SYMBOL(cx88_call_i2c_clients);

/*
 * Local variables:
 * c-basic-offset: 8
 * End:
 */
Commit	Line	Data
1da177e4	1	/*
1da177e4 LT	2
	3	cx88-i2c.c -- all the i2c code is here
	4
	5	Copyright (C) 1996,97,98 Ralph Metzler (rjkm@thp.uni-koeln.de)
4ac97914	6	& Marcus Metzler (mocm@thp.uni-koeln.de)
1da177e4 LT	7	(c) 2002 Yurij Sysoev <yurij@naturesoft.net>
	8	(c) 1999-2003 Gerd Knorr <kraxel@bytesex.org>
	9
3153d0d0 MCC	10	(c) 2005 Mauro Carvalho Chehab <mchehab@infradead.org>
	11	- Multituner support and i2c address binding
	12
1da177e4 LT	13	This program is free software; you can redistribute it and/or modify
	14	it under the terms of the GNU General Public License as published by
	15	the Free Software Foundation; either version 2 of the License, or
	16	(at your option) any later version.
	17
	18	This program is distributed in the hope that it will be useful,
	19	but WITHOUT ANY WARRANTY; without even the implied warranty of
	20	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	21	GNU General Public License for more details.
	22
	23	You should have received a copy of the GNU General Public License
	24	along with this program; if not, write to the Free Software
	25	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	26
	27	*/
	28
	29	#include <linux/module.h>
	30	#include <linux/moduleparam.h>
	31	#include <linux/init.h>
	32
	33	#include <asm/io.h>
	34
	35	#include "cx88.h"
5e453dc7	36	#include <media/v4l2-common.h>
1da177e4 LT	37
	38	static unsigned int i2c_debug = 0;
	39	module_param(i2c_debug, int, 0644);
	40	MODULE_PARM_DESC(i2c_debug,"enable debug messages [i2c]");
	41
	42	static unsigned int i2c_scan = 0;
	43	module_param(i2c_scan, int, 0444);
	44	MODULE_PARM_DESC(i2c_scan,"scan i2c bus at insmod time");
	45
141276b5 MCC	46	static unsigned int i2c_udelay = 5;
	47	module_param(i2c_udelay, int, 0644);
	48	MODULE_PARM_DESC(i2c_udelay,"i2c delay at insmod time, in usecs "
	49	"(should be 5 or higher). Lower value means higher bus speed.");
	50
1da177e4 LT	51	#define dprintk(level,fmt, arg...) if (i2c_debug >= level) \
	52	printk(KERN_DEBUG "%s: " fmt, core->name , ## arg)
	53
	54	/* ----------------------------------------------------------------------- */
	55
408b664a	56	static void cx8800_bit_setscl(void *data, int state)
1da177e4 LT	57	{
	58	struct cx88_core *core = data;
	59
	60	if (state)
	61	core->i2c_state \|= 0x02;
	62	else
	63	core->i2c_state &= ~0x02;
	64	cx_write(MO_I2C, core->i2c_state);
	65	cx_read(MO_I2C);
	66	}
	67
408b664a	68	static void cx8800_bit_setsda(void *data, int state)
1da177e4 LT	69	{
	70	struct cx88_core *core = data;
	71
	72	if (state)
	73	core->i2c_state \|= 0x01;
	74	else
	75	core->i2c_state &= ~0x01;
	76	cx_write(MO_I2C, core->i2c_state);
	77	cx_read(MO_I2C);
	78	}
	79
	80	static int cx8800_bit_getscl(void *data)
	81	{
	82	struct cx88_core *core = data;
	83	u32 state;
	84
	85	state = cx_read(MO_I2C);
	86	return state & 0x02 ? 1 : 0;
	87	}
	88
	89	static int cx8800_bit_getsda(void *data)
	90	{
	91	struct cx88_core *core = data;
	92	u32 state;
	93
	94	state = cx_read(MO_I2C);
	95	return state & 0x01;
	96	}
	97
	98	/* ----------------------------------------------------------------------- */
	99
	100	static int attach_inform(struct i2c_client *client)
	101	{
4ac97914	102	struct tuner_setup tun_setup;
1da177e4 LT	103	struct cx88_core *core = i2c_get_adapdata(client->adapter);
1da177e4 LT	104
41ef7c1e	105	dprintk(1, "%s i2c attach [addr=0x%x,client=%s]\n",
604f28e2	106	client->driver->driver.name, client->addr, client->name);
1da177e4 LT	107	if (!client->driver->command)
	108	return 0;
	109
4ac97914	110	if (core->radio_type != UNSET) {
41ef7c1e MCC	111	if ((core->radio_addr==ADDR_UNSET)\|\|(core->radio_addr==client->addr)) {
	112	tun_setup.mode_mask = T_RADIO;
	113	tun_setup.type = core->radio_type;
	114	tun_setup.addr = core->radio_addr;
	115
	116	client->driver->command (client, TUNER_SET_TYPE_ADDR, &tun_setup);
	117	}
4ac97914 MCC	118	}
4ac97914 MCC	119	if (core->tuner_type != UNSET) {
41ef7c1e MCC	120	if ((core->tuner_addr==ADDR_UNSET)\|\|(core->tuner_addr==client->addr)) {
	121
	122	tun_setup.mode_mask = T_ANALOG_TV;
	123	tun_setup.type = core->tuner_type;
	124	tun_setup.addr = core->tuner_addr;
	125
	126	client->driver->command (client,TUNER_SET_TYPE_ADDR, &tun_setup);
	127	}
4ac97914	128	}
b45009b0	129
1da177e4 LT	130	if (core->tda9887_conf)
	131	client->driver->command(client, TDA9887_SET_CONFIG, &core->tda9887_conf);
	132	return 0;
	133	}
	134
	135	static int detach_inform(struct i2c_client *client)
	136	{
	137	struct cx88_core *core = i2c_get_adapdata(client->adapter);
	138
fae91e72	139	dprintk(1, "i2c detach [client=%s]\n", client->name);
1da177e4 LT	140	return 0;
	141	}
	142
	143	void cx88_call_i2c_clients(struct cx88_core core, unsigned int cmd, void arg)
	144	{
	145	if (0 != core->i2c_rc)
	146	return;
611900c1	147
05ad3907	148	#if defined(CONFIG_VIDEO_BUF_DVB) \|\| defined(CONFIG_VIDEO_BUF_DVB_MODULE)
76ac5dd6	149	if ( (core->dvbdev) && (core->dvbdev->dvb.frontend) ) {
dea74869 PB	150	if (core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl)
dea74869 PB	151	core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl(core->dvbdev->dvb.frontend, 1);
611900c1 ST	152
	153	i2c_clients_command(&core->i2c_adap, cmd, arg);
	154
dea74869 PB	155	if (core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl)
dea74869 PB	156	core->dvbdev->dvb.frontend->ops.i2c_gate_ctrl(core->dvbdev->dvb.frontend, 0);
bcb17c42	157	} else
05ad3907	158	#endif
bcb17c42	159	i2c_clients_command(&core->i2c_adap, cmd, arg);
1da177e4 LT	160	}
	161
	162	static struct i2c_algo_bit_data cx8800_i2c_algo_template = {
	163	.setsda = cx8800_bit_setsda,
	164	.setscl = cx8800_bit_setscl,
	165	.getsda = cx8800_bit_getsda,
	166	.getscl = cx8800_bit_getscl,
	167	.udelay = 16,
1da177e4 LT	168	.timeout = 200,
	169	};
	170
	171	/* ----------------------------------------------------------------------- */
	172
	173	static struct i2c_adapter cx8800_i2c_adap_template = {
fae91e72	174	.name = "cx2388x",
1da177e4 LT	175	.owner = THIS_MODULE,
	176	.id = I2C_HW_B_CX2388x,
	177	.client_register = attach_inform,
	178	.client_unregister = detach_inform,
	179	};
	180
	181	static struct i2c_client cx8800_i2c_client_template = {
4ac97914	182	.name = "cx88xx internal",
1da177e4 LT	183	};
	184
	185	static char *i2c_devs[128] = {
6ddcc919	186	[ 0x1c >> 1 ] = "lgdt330x",
1da177e4 LT	187	[ 0x86 >> 1 ] = "tda9887/cx22702",
	188	[ 0xa0 >> 1 ] = "eeprom",
	189	[ 0xc0 >> 1 ] = "tuner (analog)",
	190	[ 0xc2 >> 1 ] = "tuner (analog/dvb)",
	191	};
	192
	193	static void do_i2c_scan(char name, struct i2c_client c)
	194	{
	195	unsigned char buf;
	196	int i,rc;
	197
	198	for (i = 0; i < 128; i++) {
	199	c->addr = i;
	200	rc = i2c_master_recv(c,&buf,0);
	201	if (rc < 0)
	202	continue;
	203	printk("%s: i2c scan: found device @ 0x%x [%s]\n",
	204	name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
	205	}
	206	}
	207
	208	/* init + register i2c algo-bit adapter */
	209	int cx88_i2c_init(struct cx88_core core, struct pci_dev pci)
	210	{
141276b5 MCC	211	/* Prevents usage of invalid delay values */
	212	if (i2c_udelay<5)
	213	i2c_udelay=5;
	214	cx8800_i2c_algo_template.udelay=i2c_udelay;
	215
1da177e4 LT	216	memcpy(&core->i2c_adap, &cx8800_i2c_adap_template,
	217	sizeof(core->i2c_adap));
	218	memcpy(&core->i2c_algo, &cx8800_i2c_algo_template,
	219	sizeof(core->i2c_algo));
	220	memcpy(&core->i2c_client, &cx8800_i2c_client_template,
	221	sizeof(core->i2c_client));
	222
	223	if (core->tuner_type != TUNER_ABSENT)
	224	core->i2c_adap.class \|= I2C_CLASS_TV_ANALOG;
48d5e803	225	if (cx88_boards[core->board].mpeg & CX88_MPEG_DVB)
1da177e4 LT	226	core->i2c_adap.class \|= I2C_CLASS_TV_DIGITAL;
	227
	228	core->i2c_adap.dev.parent = &pci->dev;
	229	strlcpy(core->i2c_adap.name,core->name,sizeof(core->i2c_adap.name));
4ac97914 MCC	230	core->i2c_algo.data = core;
	231	i2c_set_adapdata(&core->i2c_adap,core);
	232	core->i2c_adap.algo_data = &core->i2c_algo;
	233	core->i2c_client.adapter = &core->i2c_adap;
1da177e4 LT	234
	235	cx8800_bit_setscl(core,1);
	236	cx8800_bit_setsda(core,1);
	237
	238	core->i2c_rc = i2c_bit_add_bus(&core->i2c_adap);
	239	if (0 == core->i2c_rc) {
	240	dprintk(1, "i2c register ok\n");
	241	if (i2c_scan)
	242	do_i2c_scan(core->name,&core->i2c_client);
	243	} else
	244	printk("%s: i2c register FAILED\n", core->name);
	245	return core->i2c_rc;
	246	}
	247
	248	/* ----------------------------------------------------------------------- */
	249
	250	EXPORT_SYMBOL(cx88_call_i2c_clients);
1da177e4 LT	251
	252	/*
	253	* Local variables:
	254	* c-basic-offset: 8
	255	* End:
	256	*/