drivers/media/video/cx88/cx88-i2c.c - kernel/msm - Gitiles

 /*
     $Id: cx88-i2c.c,v 1.23 2005/06/12 04:19:19 mchehab Exp $

     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>

     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"

 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");

 #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_addr tun_addr;
 	struct cx88_core *core = i2c_get_adapdata(client->adapter);

 	dprintk(1, "i2c attach [addr=0x%x,client=%s]\n",
 		client->addr, i2c_clientname(client));
 	if (!client->driver->command)
 		return 0;

         if (core->radio_type != UNSET) {
                 tun_addr.v4l2_tuner = V4L2_TUNER_RADIO;
                 tun_addr.type = core->radio_type;
                 tun_addr.addr = core->radio_addr;
                 client->driver->command(client,TUNER_SET_TYPE_ADDR, &tun_addr);
         }
         if (core->tuner_type != UNSET) {
                 tun_addr.v4l2_tuner = V4L2_TUNER_ANALOG_TV;
                 tun_addr.type = core->tuner_type;
                 tun_addr.addr = core->tuner_addr;
                 client->driver->command(client,TUNER_SET_TYPE_ADDR, &tun_addr);
         }

 	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", i2c_clientname(client));
 	return 0;
 }

 void cx88_call_i2c_clients(struct cx88_core *core, unsigned int cmd, void *arg)
 {
 	if (0 != core->i2c_rc)
 		return;
 	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,
 	.mdelay  = 10,
 	.timeout = 200,
 };

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

 static struct i2c_adapter cx8800_i2c_adap_template = {
 	I2C_DEVNAME("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 = {
         I2C_DEVNAME("cx88xx internal"),
 };

 static char *i2c_devs[128] = {
 	[ 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)
 {
 	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].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);
 EXPORT_SYMBOL(cx88_i2c_init);

 /*
  * Local variables:
  * c-basic-offset: 8
  * End:
  */
	/*
	$Id: cx88-i2c.c,v 1.23 2005/06/12 04:19:19 mchehab Exp $

	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>

	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"

	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");

	#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_addr tun_addr;
	struct cx88_core *core = i2c_get_adapdata(client->adapter);

	dprintk(1, "i2c attach [addr=0x%x,client=%s]\n",
	client->addr, i2c_clientname(client));
	if (!client->driver->command)
	return 0;

	if (core->radio_type != UNSET) {
	tun_addr.v4l2_tuner = V4L2_TUNER_RADIO;
	tun_addr.type = core->radio_type;
	tun_addr.addr = core->radio_addr;
	client->driver->command(client,TUNER_SET_TYPE_ADDR, &tun_addr);
	}
	if (core->tuner_type != UNSET) {
	tun_addr.v4l2_tuner = V4L2_TUNER_ANALOG_TV;
	tun_addr.type = core->tuner_type;
	tun_addr.addr = core->tuner_addr;
	client->driver->command(client,TUNER_SET_TYPE_ADDR, &tun_addr);
	}

	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", i2c_clientname(client));
	return 0;
	}

	void cx88_call_i2c_clients(struct cx88_core core, unsigned int cmd, void arg)
	{
	if (0 != core->i2c_rc)
	return;
	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,
	.mdelay = 10,
	.timeout = 200,
	};

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

	static struct i2c_adapter cx8800_i2c_adap_template = {
	I2C_DEVNAME("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 = {
	I2C_DEVNAME("cx88xx internal"),
	};

	static char *i2c_devs[128] = {
	[ 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)
	{
	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].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);
	EXPORT_SYMBOL(cx88_i2c_init);

	/*
	* Local variables:
	* c-basic-offset: 8
	* End:
	*/