drivers/media/video/cx88/cx88-i2c.c - kernel/msm-4.19 - Gitiles


 /*

     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/init.h>

 #include <asm/io.h>

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

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

 static unsigned int i2c_scan;
 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 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);
 	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)
 {
 	struct videobuf_dvb_frontends *f = &core->dvbdev->frontends;
 	struct videobuf_dvb_frontend *fe = NULL;
 	if (0 != core->i2c_rc)
 		return;

 #if defined(CONFIG_VIDEO_CX88_DVB) || defined(CONFIG_VIDEO_CX88_DVB_MODULE)
 	if (core->dvbdev && f) {
 		if(f->gate <= 1) /* undefined or fe0 */
 			fe = videobuf_dvb_get_frontend(f, 1);
 		else
 			fe = videobuf_dvb_get_frontend(f, f->gate);

 		if (fe && fe->dvb.frontend && fe->dvb.frontend->ops.i2c_gate_ctrl)
 			fe->dvb.frontend->ops.i2c_gate_ctrl(fe->dvb.frontend, 1);

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

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

 static const 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 char *i2c_devs[128] = {
 	[ 0x1c >> 1 ] = "lgdt330x",
 	[ 0x86 >> 1 ] = "tda9887/cx22702",
 	[ 0xa0 >> 1 ] = "eeprom",
 	[ 0xc0 >> 1 ] = "tuner (analog)",
 	[ 0xc2 >> 1 ] = "tuner (analog/dvb)",
 	[ 0xc8 >> 1 ] = "xc5000",
 };

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

 	for (i = 0; i < ARRAY_SIZE(i2c_devs); 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;

 	memcpy(&core->i2c_algo, &cx8800_i2c_algo_template,
 	       sizeof(core->i2c_algo));

 	if (core->board.tuner_type != TUNER_ABSENT)
 		core->i2c_adap.class |= I2C_CLASS_TV_ANALOG;
 	if (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_adap.owner = THIS_MODULE;
 	core->i2c_adap.id = I2C_HW_B_CX2388x;
 	core->i2c_adap.client_register = attach_inform;
 	core->i2c_adap.client_unregister = detach_inform;
 	core->i2c_algo.udelay = i2c_udelay;
 	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;
 	strlcpy(core->i2c_client.name, "cx88xx internal", I2C_NAME_SIZE);

 	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) {
 		static u8 tuner_data[] =
 			{ 0x0b, 0xdc, 0x86, 0x52 };
 		static struct i2c_msg tuner_msg =
 			{ .flags = 0, .addr = 0xc2 >> 1, .buf = tuner_data, .len = 4 };

 		dprintk(1, "i2c register ok\n");
 		switch( core->boardnr ) {
 			case CX88_BOARD_HAUPPAUGE_HVR1300:
 			case CX88_BOARD_HAUPPAUGE_HVR3000:
 			case CX88_BOARD_HAUPPAUGE_HVR4000:
 				printk("%s: i2c init: enabling analog demod on HVR1300/3000/4000 tuner\n",
 					core->name);
 				i2c_transfer(core->i2c_client.adapter, &tuner_msg, 1);
 				break;
 			default:
 				break;
 		}
 		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:
  */

	/*

	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/init.h>

	#include <asm/io.h>

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

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

	static unsigned int i2c_scan;
	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 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);
	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)
	{
	struct videobuf_dvb_frontends *f = &core->dvbdev->frontends;
	struct videobuf_dvb_frontend *fe = NULL;
	if (0 != core->i2c_rc)
	return;

	#if defined(CONFIG_VIDEO_CX88_DVB) \|\| defined(CONFIG_VIDEO_CX88_DVB_MODULE)
	if (core->dvbdev && f) {
	if(f->gate <= 1) /* undefined or fe0 */
	fe = videobuf_dvb_get_frontend(f, 1);
	else
	fe = videobuf_dvb_get_frontend(f, f->gate);

	if (fe && fe->dvb.frontend && fe->dvb.frontend->ops.i2c_gate_ctrl)
	fe->dvb.frontend->ops.i2c_gate_ctrl(fe->dvb.frontend, 1);

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

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

	static const 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 char *i2c_devs[128] = {
	[ 0x1c >> 1 ] = "lgdt330x",
	[ 0x86 >> 1 ] = "tda9887/cx22702",
	[ 0xa0 >> 1 ] = "eeprom",
	[ 0xc0 >> 1 ] = "tuner (analog)",
	[ 0xc2 >> 1 ] = "tuner (analog/dvb)",
	[ 0xc8 >> 1 ] = "xc5000",
	};

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

	for (i = 0; i < ARRAY_SIZE(i2c_devs); 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;

	memcpy(&core->i2c_algo, &cx8800_i2c_algo_template,
	sizeof(core->i2c_algo));

	if (core->board.tuner_type != TUNER_ABSENT)
	core->i2c_adap.class \|= I2C_CLASS_TV_ANALOG;
	if (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_adap.owner = THIS_MODULE;
	core->i2c_adap.id = I2C_HW_B_CX2388x;
	core->i2c_adap.client_register = attach_inform;
	core->i2c_adap.client_unregister = detach_inform;
	core->i2c_algo.udelay = i2c_udelay;
	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;
	strlcpy(core->i2c_client.name, "cx88xx internal", I2C_NAME_SIZE);

	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) {
	static u8 tuner_data[] =
	{ 0x0b, 0xdc, 0x86, 0x52 };
	static struct i2c_msg tuner_msg =
	{ .flags = 0, .addr = 0xc2 >> 1, .buf = tuner_data, .len = 4 };

	dprintk(1, "i2c register ok\n");
	switch( core->boardnr ) {
	case CX88_BOARD_HAUPPAUGE_HVR1300:
	case CX88_BOARD_HAUPPAUGE_HVR3000:
	case CX88_BOARD_HAUPPAUGE_HVR4000:
	printk("%s: i2c init: enabling analog demod on HVR1300/3000/4000 tuner\n",
	core->name);
	i2c_transfer(core->i2c_client.adapter, &tuner_msg, 1);
	break;
	default:
	break;
	}
	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:
	*/