[mirror_ubuntu-jammy-kernel.git] / drivers / media / video / bt8xx / bttv-i2c.c

/*

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

    bttv - Bt848 frame grabber driver

    Copyright (C) 1996,97,98 Ralph  Metzler (rjkm@thp.uni-koeln.de)
			   & Marcus Metzler (mocm@thp.uni-koeln.de)
    (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 <linux/delay.h>

#include "bttvp.h"
#include <media/v4l2-common.h>
#include <linux/jiffies.h>
#include <asm/io.h>

static int attach_inform(struct i2c_client *client);

static int i2c_debug;
static int i2c_hw;
static int i2c_scan;
module_param(i2c_debug, int, 0644);
MODULE_PARM_DESC(i2c_hw,"configure i2c debug level");
module_param(i2c_hw,    int, 0444);
MODULE_PARM_DESC(i2c_hw,"force use of hardware i2c support, "
			"instead of software bitbang");
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, 0444);
MODULE_PARM_DESC(i2c_udelay,"soft i2c delay at insmod time, in usecs "
		"(should be 5 or higher). Lower value means higher bus speed.");

/* ----------------------------------------------------------------------- */
/* I2C functions - bitbanging adapter (software i2c)                       */

static void bttv_bit_setscl(void *data, int state)
{
	struct bttv *btv = (struct bttv*)data;

	if (state)
		btv->i2c_state |= 0x02;
	else
		btv->i2c_state &= ~0x02;
	btwrite(btv->i2c_state, BT848_I2C);
	btread(BT848_I2C);
}

static void bttv_bit_setsda(void *data, int state)
{
	struct bttv *btv = (struct bttv*)data;

	if (state)
		btv->i2c_state |= 0x01;
	else
		btv->i2c_state &= ~0x01;
	btwrite(btv->i2c_state, BT848_I2C);
	btread(BT848_I2C);
}

static int bttv_bit_getscl(void *data)
{
	struct bttv *btv = (struct bttv*)data;
	int state;

	state = btread(BT848_I2C) & 0x02 ? 1 : 0;
	return state;
}

static int bttv_bit_getsda(void *data)
{
	struct bttv *btv = (struct bttv*)data;
	int state;

	state = btread(BT848_I2C) & 0x01;
	return state;
}

static struct i2c_algo_bit_data __devinitdata bttv_i2c_algo_bit_template = {
	.setsda  = bttv_bit_setsda,
	.setscl  = bttv_bit_setscl,
	.getsda  = bttv_bit_getsda,
	.getscl  = bttv_bit_getscl,
	.udelay  = 16,
	.timeout = 200,
};

/* ----------------------------------------------------------------------- */
/* I2C functions - hardware i2c                                            */

static u32 functionality(struct i2c_adapter *adap)
{
	return I2C_FUNC_SMBUS_EMUL;
}

static int
bttv_i2c_wait_done(struct bttv *btv)
{
	int rc = 0;

	/* timeout */
	if (wait_event_interruptible_timeout(btv->i2c_queue,
		btv->i2c_done, msecs_to_jiffies(85)) == -ERESTARTSYS)

	rc = -EIO;

	if (btv->i2c_done & BT848_INT_RACK)
		rc = 1;
	btv->i2c_done = 0;
	return rc;
}

#define I2C_HW (BT878_I2C_MODE  | BT848_I2C_SYNC |\
		BT848_I2C_SCL | BT848_I2C_SDA)

static int
bttv_i2c_sendbytes(struct bttv *btv, const struct i2c_msg *msg, int last)
{
	u32 xmit;
	int retval,cnt;

	/* sanity checks */
	if (0 == msg->len)
		return -EINVAL;

	/* start, address + first byte */
	xmit = (msg->addr << 25) | (msg->buf[0] << 16) | I2C_HW;
	if (msg->len > 1 || !last)
		xmit |= BT878_I2C_NOSTOP;
	btwrite(xmit, BT848_I2C);
	retval = bttv_i2c_wait_done(btv);
	if (retval < 0)
		goto err;
	if (retval == 0)
		goto eio;
	if (i2c_debug) {
		printk(" <W %02x %02x", msg->addr << 1, msg->buf[0]);
		if (!(xmit & BT878_I2C_NOSTOP))
			printk(" >\n");
	}

	for (cnt = 1; cnt < msg->len; cnt++ ) {
		/* following bytes */
		xmit = (msg->buf[cnt] << 24) | I2C_HW | BT878_I2C_NOSTART;
		if (cnt < msg->len-1 || !last)
			xmit |= BT878_I2C_NOSTOP;
		btwrite(xmit, BT848_I2C);
		retval = bttv_i2c_wait_done(btv);
		if (retval < 0)
			goto err;
		if (retval == 0)
			goto eio;
		if (i2c_debug) {
			printk(" %02x", msg->buf[cnt]);
			if (!(xmit & BT878_I2C_NOSTOP))
				printk(" >\n");
		}
	}
	return msg->len;

 eio:
	retval = -EIO;
 err:
	if (i2c_debug)
		printk(" ERR: %d\n",retval);
	return retval;
}

static int
bttv_i2c_readbytes(struct bttv *btv, const struct i2c_msg *msg, int last)
{
	u32 xmit;
	u32 cnt;
	int retval;

	for(cnt = 0; cnt < msg->len; cnt++) {
		xmit = (msg->addr << 25) | (1 << 24) | I2C_HW;
		if (cnt < msg->len-1)
			xmit |= BT848_I2C_W3B;
		if (cnt < msg->len-1 || !last)
			xmit |= BT878_I2C_NOSTOP;
		if (cnt)
			xmit |= BT878_I2C_NOSTART;
		btwrite(xmit, BT848_I2C);
		retval = bttv_i2c_wait_done(btv);
		if (retval < 0)
			goto err;
		if (retval == 0)
			goto eio;
		msg->buf[cnt] = ((u32)btread(BT848_I2C) >> 8) & 0xff;
		if (i2c_debug) {
			if (!(xmit & BT878_I2C_NOSTART))
				printk(" <R %02x", (msg->addr << 1) +1);
			printk(" =%02x", msg->buf[cnt]);
			if (!(xmit & BT878_I2C_NOSTOP))
				printk(" >\n");
		}
	}
	return msg->len;

 eio:
	retval = -EIO;
 err:
	if (i2c_debug)
		printk(" ERR: %d\n",retval);
	return retval;
}

static int bttv_i2c_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs, int num)
{
	struct bttv *btv = i2c_get_adapdata(i2c_adap);
	int retval = 0;
	int i;

	if (i2c_debug)
		printk("bt-i2c:");
	btwrite(BT848_INT_I2CDONE|BT848_INT_RACK, BT848_INT_STAT);
	for (i = 0 ; i < num; i++) {
		if (msgs[i].flags & I2C_M_RD) {
			/* read */
			retval = bttv_i2c_readbytes(btv, &msgs[i], i+1 == num);
			if (retval < 0)
				goto err;
		} else {
			/* write */
			retval = bttv_i2c_sendbytes(btv, &msgs[i], i+1 == num);
			if (retval < 0)
				goto err;
		}
	}
	return num;

 err:
	return retval;
}

static const struct i2c_algorithm bttv_algo = {
	.master_xfer   = bttv_i2c_xfer,
	.functionality = functionality,
};

/* ----------------------------------------------------------------------- */
/* I2C functions - common stuff                                            */

static int attach_inform(struct i2c_client *client)
{
	struct bttv *btv = i2c_get_adapdata(client->adapter);
	int addr=ADDR_UNSET;


	if (ADDR_UNSET != bttv_tvcards[btv->c.type].tuner_addr)
		addr = bttv_tvcards[btv->c.type].tuner_addr;


	if (bttv_debug)
		printk(KERN_DEBUG "bttv%d: %s i2c attach [addr=0x%x,client=%s]\n",
			btv->c.nr, client->driver->driver.name, client->addr,
			client->name);
	if (!client->driver->command)
		return 0;

	if (client->driver->id == I2C_DRIVERID_MSP3400)
		btv->i2c_msp34xx_client = client;
	if (client->driver->id == I2C_DRIVERID_TVAUDIO)
		btv->i2c_tvaudio_client = client;
	if (btv->tuner_type != TUNER_ABSENT) {
		struct tuner_setup tun_setup;

		if (addr == ADDR_UNSET || addr == client->addr) {
			tun_setup.mode_mask = T_ANALOG_TV | T_DIGITAL_TV | T_RADIO;
			tun_setup.type = btv->tuner_type;
			tun_setup.addr = addr;
			bttv_call_i2c_clients(btv, TUNER_SET_TYPE_ADDR, &tun_setup);
		}

	}

	return 0;
}

void bttv_call_i2c_clients(struct bttv *btv, unsigned int cmd, void *arg)
{
	if (0 != btv->i2c_rc)
		return;
	i2c_clients_command(&btv->c.i2c_adap, cmd, arg);
}


/* read I2C */
int bttv_I2CRead(struct bttv *btv, unsigned char addr, char *probe_for)
{
	unsigned char buffer = 0;

	if (0 != btv->i2c_rc)
		return -1;
	if (bttv_verbose && NULL != probe_for)
		printk(KERN_INFO "bttv%d: i2c: checking for %s @ 0x%02x... ",
		       btv->c.nr,probe_for,addr);
	btv->i2c_client.addr = addr >> 1;
	if (1 != i2c_master_recv(&btv->i2c_client, &buffer, 1)) {
		if (NULL != probe_for) {
			if (bttv_verbose)
				printk("not found\n");
		} else
			printk(KERN_WARNING "bttv%d: i2c read 0x%x: error\n",
			       btv->c.nr,addr);
		return -1;
	}
	if (bttv_verbose && NULL != probe_for)
		printk("found\n");
	return buffer;
}

/* write I2C */
int bttv_I2CWrite(struct bttv *btv, unsigned char addr, unsigned char b1,
		    unsigned char b2, int both)
{
	unsigned char buffer[2];
	int bytes = both ? 2 : 1;

	if (0 != btv->i2c_rc)
		return -1;
	btv->i2c_client.addr = addr >> 1;
	buffer[0] = b1;
	buffer[1] = b2;
	if (bytes != i2c_master_send(&btv->i2c_client, buffer, bytes))
		return -1;
	return 0;
}

/* read EEPROM content */
void __devinit bttv_readee(struct bttv *btv, unsigned char *eedata, int addr)
{
	memset(eedata, 0, 256);
	if (0 != btv->i2c_rc)
		return;
	btv->i2c_client.addr = addr >> 1;
	tveeprom_read(&btv->i2c_client, eedata, 256);
}

static char *i2c_devs[128] = {
	[ 0x1c >> 1 ] = "lgdt330x",
	[ 0x30 >> 1 ] = "IR (hauppauge)",
	[ 0x80 >> 1 ] = "msp34xx",
	[ 0x86 >> 1 ] = "tda9887",
	[ 0xa0 >> 1 ] = "eeprom",
	[ 0xc0 >> 1 ] = "tuner (analog)",
	[ 0xc2 >> 1 ] = "tuner (analog)",
};

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 __devinit init_bttv_i2c(struct bttv *btv)
{
	strlcpy(btv->i2c_client.name, "bttv internal", I2C_NAME_SIZE);

	if (i2c_hw)
		btv->use_i2c_hw = 1;
	if (btv->use_i2c_hw) {
		/* bt878 */
		strlcpy(btv->c.i2c_adap.name, "bt878",
			sizeof(btv->c.i2c_adap.name));
		btv->c.i2c_adap.id = I2C_HW_B_BT848;	/* FIXME */
		btv->c.i2c_adap.algo = &bttv_algo;
	} else {
		/* bt848 */
	/* Prevents usage of invalid delay values */
		if (i2c_udelay<5)
			i2c_udelay=5;

		strlcpy(btv->c.i2c_adap.name, "bttv",
			sizeof(btv->c.i2c_adap.name));
		btv->c.i2c_adap.id = I2C_HW_B_BT848;
		memcpy(&btv->i2c_algo, &bttv_i2c_algo_bit_template,
		       sizeof(bttv_i2c_algo_bit_template));
		btv->i2c_algo.udelay = i2c_udelay;
		btv->i2c_algo.data = btv;
		btv->c.i2c_adap.algo_data = &btv->i2c_algo;
	}
	btv->c.i2c_adap.owner = THIS_MODULE;
	btv->c.i2c_adap.class = I2C_CLASS_TV_ANALOG;
	btv->c.i2c_adap.client_register = attach_inform;

	btv->c.i2c_adap.dev.parent = &btv->c.pci->dev;
	snprintf(btv->c.i2c_adap.name, sizeof(btv->c.i2c_adap.name),
		 "bt%d #%d [%s]", btv->id, btv->c.nr,
		 btv->use_i2c_hw ? "hw" : "sw");

	i2c_set_adapdata(&btv->c.i2c_adap, btv);
	btv->i2c_client.adapter = &btv->c.i2c_adap;

	if (bttv_tvcards[btv->c.type].no_video)
		btv->c.i2c_adap.class &= ~I2C_CLASS_TV_ANALOG;
	if (bttv_tvcards[btv->c.type].has_dvb)
		btv->c.i2c_adap.class |= I2C_CLASS_TV_DIGITAL;

	if (btv->use_i2c_hw) {
		btv->i2c_rc = i2c_add_adapter(&btv->c.i2c_adap);
	} else {
		bttv_bit_setscl(btv,1);
		bttv_bit_setsda(btv,1);
		btv->i2c_rc = i2c_bit_add_bus(&btv->c.i2c_adap);
	}
	if (0 == btv->i2c_rc && i2c_scan)
		do_i2c_scan(btv->c.name,&btv->i2c_client);
	return btv->i2c_rc;
}

int __devexit fini_bttv_i2c(struct bttv *btv)
{
	if (0 != btv->i2c_rc)
		return 0;

	return i2c_del_adapter(&btv->c.i2c_adap);
}

/*
 * Local variables:
 * c-basic-offset: 8
 * End:
 */
Commit	Line	Data
1da177e4	1	/*
1da177e4 LT	2
	3	bttv-i2c.c -- all the i2c code is here
	4
	5	bttv - Bt848 frame grabber driver
	6
	7	Copyright (C) 1996,97,98 Ralph Metzler (rjkm@thp.uni-koeln.de)
4ac97914	8	& Marcus Metzler (mocm@thp.uni-koeln.de)
1da177e4 LT	9	(c) 1999-2003 Gerd Knorr <kraxel@bytesex.org>
1da177e4 LT	10
141276b5 MCC	11	(c) 2005 Mauro Carvalho Chehab <mchehab@infradead.org>
	12	- Multituner support and i2c address binding
	13
1da177e4 LT	14	This program is free software; you can redistribute it and/or modify
	15	it under the terms of the GNU General Public License as published by
	16	the Free Software Foundation; either version 2 of the License, or
	17	(at your option) any later version.
	18
	19	This program is distributed in the hope that it will be useful,
	20	but WITHOUT ANY WARRANTY; without even the implied warranty of
	21	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	22	GNU General Public License for more details.
	23
	24	You should have received a copy of the GNU General Public License
	25	along with this program; if not, write to the Free Software
	26	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	27
	28	*/
	29
	30	#include <linux/module.h>
1da177e4 LT	31	#include <linux/init.h>
1da177e4 LT	32	#include <linux/delay.h>
1da177e4 LT	33
1da177e4 LT	34	#include "bttvp.h"
5e453dc7	35	#include <media/v4l2-common.h>
b5b8ab8d MCC	36	#include <linux/jiffies.h>
b5b8ab8d MCC	37	#include <asm/io.h>
1da177e4	38
1da177e4 LT	39	static int attach_inform(struct i2c_client *client);
1da177e4 LT	40
a5ed425c MCC	41	static int i2c_debug;
	42	static int i2c_hw;
	43	static int i2c_scan;
1da177e4	44	module_param(i2c_debug, int, 0644);
141276b5	45	MODULE_PARM_DESC(i2c_hw,"configure i2c debug level");
1da177e4	46	module_param(i2c_hw, int, 0444);
141276b5 MCC	47	MODULE_PARM_DESC(i2c_hw,"force use of hardware i2c support, "
141276b5 MCC	48	"instead of software bitbang");
1da177e4 LT	49	module_param(i2c_scan, int, 0444);
	50	MODULE_PARM_DESC(i2c_scan,"scan i2c bus at insmod time");
	51
141276b5 MCC	52	static unsigned int i2c_udelay = 5;
	53	module_param(i2c_udelay, int, 0444);
	54	MODULE_PARM_DESC(i2c_udelay,"soft i2c delay at insmod time, in usecs "
	55	"(should be 5 or higher). Lower value means higher bus speed.");
	56
1da177e4 LT	57	/* ----------------------------------------------------------------------- */
	58	/* I2C functions - bitbanging adapter (software i2c) */
	59
	60	static void bttv_bit_setscl(void *data, int state)
	61	{
	62	struct bttv btv = (struct bttv)data;
	63
	64	if (state)
	65	btv->i2c_state \|= 0x02;
	66	else
	67	btv->i2c_state &= ~0x02;
	68	btwrite(btv->i2c_state, BT848_I2C);
	69	btread(BT848_I2C);
	70	}
	71
	72	static void bttv_bit_setsda(void *data, int state)
	73	{
	74	struct bttv btv = (struct bttv)data;
	75
	76	if (state)
	77	btv->i2c_state \|= 0x01;
	78	else
	79	btv->i2c_state &= ~0x01;
	80	btwrite(btv->i2c_state, BT848_I2C);
	81	btread(BT848_I2C);
	82	}
	83
	84	static int bttv_bit_getscl(void *data)
	85	{
	86	struct bttv btv = (struct bttv)data;
	87	int state;
	88
	89	state = btread(BT848_I2C) & 0x02 ? 1 : 0;
	90	return state;
	91	}
	92
	93	static int bttv_bit_getsda(void *data)
	94	{
	95	struct bttv btv = (struct bttv)data;
	96	int state;
	97
	98	state = btread(BT848_I2C) & 0x01;
	99	return state;
	100	}
	101
df9b5d4c	102	static struct i2c_algo_bit_data __devinitdata bttv_i2c_algo_bit_template = {
1da177e4 LT	103	.setsda = bttv_bit_setsda,
	104	.setscl = bttv_bit_setscl,
	105	.getsda = bttv_bit_getsda,
	106	.getscl = bttv_bit_getscl,
	107	.udelay = 16,
1da177e4 LT	108	.timeout = 200,
	109	};
	110
1da177e4 LT	111	/* ----------------------------------------------------------------------- */
	112	/* I2C functions - hardware i2c */
	113
1da177e4 LT	114	static u32 functionality(struct i2c_adapter *adap)
	115	{
	116	return I2C_FUNC_SMBUS_EMUL;
	117	}
	118
	119	static int
	120	bttv_i2c_wait_done(struct bttv *btv)
	121	{
1da177e4 LT	122	int rc = 0;
1da177e4 LT	123
fc9d53af MA	124	/* timeout */
	125	if (wait_event_interruptible_timeout(btv->i2c_queue,
	126	btv->i2c_done, msecs_to_jiffies(85)) == -ERESTARTSYS)
	127
	128	rc = -EIO;
1da177e4	129
1da177e4 LT	130	if (btv->i2c_done & BT848_INT_RACK)
	131	rc = 1;
	132	btv->i2c_done = 0;
	133	return rc;
	134	}
	135
	136	#define I2C_HW (BT878_I2C_MODE \| BT848_I2C_SYNC \|\
	137	BT848_I2C_SCL \| BT848_I2C_SDA)
	138
	139	static int
	140	bttv_i2c_sendbytes(struct bttv btv, const struct i2c_msg msg, int last)
	141	{
	142	u32 xmit;
	143	int retval,cnt;
	144
	145	/* sanity checks */
	146	if (0 == msg->len)
	147	return -EINVAL;
	148
	149	/* start, address + first byte */
	150	xmit = (msg->addr << 25) \| (msg->buf[0] << 16) \| I2C_HW;
	151	if (msg->len > 1 \|\| !last)
	152	xmit \|= BT878_I2C_NOSTOP;
	153	btwrite(xmit, BT848_I2C);
	154	retval = bttv_i2c_wait_done(btv);
	155	if (retval < 0)
	156	goto err;
	157	if (retval == 0)
	158	goto eio;
	159	if (i2c_debug) {
	160	printk(" <W %02x %02x", msg->addr << 1, msg->buf[0]);
	161	if (!(xmit & BT878_I2C_NOSTOP))
	162	printk(" >\n");
	163	}
	164
	165	for (cnt = 1; cnt < msg->len; cnt++ ) {
	166	/* following bytes */
	167	xmit = (msg->buf[cnt] << 24) \| I2C_HW \| BT878_I2C_NOSTART;
	168	if (cnt < msg->len-1 \|\| !last)
	169	xmit \|= BT878_I2C_NOSTOP;
	170	btwrite(xmit, BT848_I2C);
	171	retval = bttv_i2c_wait_done(btv);
	172	if (retval < 0)
	173	goto err;
	174	if (retval == 0)
	175	goto eio;
	176	if (i2c_debug) {
	177	printk(" %02x", msg->buf[cnt]);
	178	if (!(xmit & BT878_I2C_NOSTOP))
	179	printk(" >\n");
	180	}
	181	}
	182	return msg->len;
	183
	184	eio:
	185	retval = -EIO;
	186	err:
	187	if (i2c_debug)
	188	printk(" ERR: %d\n",retval);
	189	return retval;
	190	}
	191
	192	static int
	193	bttv_i2c_readbytes(struct bttv btv, const struct i2c_msg msg, int last)
194	{
195	u32 xmit;
196	u32 cnt;
197	int retval;
198
199	for(cnt = 0; cnt < msg->len; cnt++) {
200	xmit = (msg->addr << 25) \| (1 << 24) \| I2C_HW;
201	if (cnt < msg->len-1)
202	xmit \|= BT848_I2C_W3B;
203	if (cnt < msg->len-1 \|\| !last)
204	xmit \|= BT878_I2C_NOSTOP;
205	if (cnt)
206	xmit \|= BT878_I2C_NOSTART;
207	btwrite(xmit, BT848_I2C);
208	retval = bttv_i2c_wait_done(btv);
209	if (retval < 0)
210	goto err;
211	if (retval == 0)
212	goto eio;
213	msg->buf[cnt] = ((u32)btread(BT848_I2C) >> 8) & 0xff;
214	if (i2c_debug) {
215	if (!(xmit & BT878_I2C_NOSTART))
216	printk(" <R %02x", (msg->addr << 1) +1);
217	printk(" =%02x", msg->buf[cnt]);
218	if (!(xmit & BT878_I2C_NOSTOP))
219	printk(" >\n");
220	}
221	}
222	return msg->len;
223
224	eio:
225	retval = -EIO;
226	err:
227	if (i2c_debug)
228	printk(" ERR: %d\n",retval);
4ac97914	229	return retval;
1da177e4 LT	230	}
	231
	232	static int bttv_i2c_xfer(struct i2c_adapter i2c_adap, struct i2c_msg msgs, int num)
	233	{
	234	struct bttv *btv = i2c_get_adapdata(i2c_adap);
	235	int retval = 0;
	236	int i;
	237
	238	if (i2c_debug)
	239	printk("bt-i2c:");
	240	btwrite(BT848_INT_I2CDONE\|BT848_INT_RACK, BT848_INT_STAT);
	241	for (i = 0 ; i < num; i++) {
	242	if (msgs[i].flags & I2C_M_RD) {
	243	/* read */
	244	retval = bttv_i2c_readbytes(btv, &msgs[i], i+1 == num);
	245	if (retval < 0)
	246	goto err;
	247	} else {
	248	/* write */
	249	retval = bttv_i2c_sendbytes(btv, &msgs[i], i+1 == num);
	250	if (retval < 0)
	251	goto err;
	252	}
	253	}
	254	return num;
	255
	256	err:
	257	return retval;
	258	}
	259
df9b5d4c	260	static const struct i2c_algorithm bttv_algo = {
1da177e4	261	.master_xfer = bttv_i2c_xfer,
1da177e4 LT	262	.functionality = functionality,
	263	};
	264
1da177e4 LT	265	/* ----------------------------------------------------------------------- */
	266	/* I2C functions - common stuff */
	267
	268	static int attach_inform(struct i2c_client *client)
	269	{
4ac97914	270	struct bttv *btv = i2c_get_adapdata(client->adapter);
291d1d73 RC	271	int addr=ADDR_UNSET;
	272
	273
7418f346 LB	274	if (ADDR_UNSET != bttv_tvcards[btv->c.type].tuner_addr)
7418f346 LB	275	addr = bttv_tvcards[btv->c.type].tuner_addr;
aa8d5e72	276
1da177e4	277
fa9846a8 MCC	278	if (bttv_debug)
fa9846a8 MCC	279	printk(KERN_DEBUG "bttv%d: %s i2c attach [addr=0x%x,client=%s]\n",
604f28e2	280	btv->c.nr, client->driver->driver.name, client->addr,
fae91e72	281	client->name);
fa9846a8 MCC	282	if (!client->driver->command)
	283	return 0;
	284
8bf2f8e7 HV	285	if (client->driver->id == I2C_DRIVERID_MSP3400)
	286	btv->i2c_msp34xx_client = client;
	287	if (client->driver->id == I2C_DRIVERID_TVAUDIO)
	288	btv->i2c_tvaudio_client = client;
abb0362f	289	if (btv->tuner_type != TUNER_ABSENT) {
4ac97914	290	struct tuner_setup tun_setup;
fa9846a8	291
abb0362f	292	if (addr == ADDR_UNSET \|\| addr == client->addr) {
7418f346 LB	293	tun_setup.mode_mask = T_ANALOG_TV \| T_DIGITAL_TV \| T_RADIO;
7418f346 LB	294	tun_setup.type = btv->tuner_type;
291d1d73	295	tun_setup.addr = addr;
7418f346	296	bttv_call_i2c_clients(btv, TUNER_SET_TYPE_ADDR, &tun_setup);
85a2eb07	297	}
291d1d73	298
fa9846a8 MCC	299	}
fa9846a8 MCC	300
4ac97914	301	return 0;
1da177e4 LT	302	}
	303
	304	void bttv_call_i2c_clients(struct bttv btv, unsigned int cmd, void arg)
	305	{
	306	if (0 != btv->i2c_rc)
	307	return;
	308	i2c_clients_command(&btv->c.i2c_adap, cmd, arg);
	309	}
	310
1da177e4 LT	311
	312	/* read I2C */
	313	int bttv_I2CRead(struct bttv btv, unsigned char addr, char probe_for)
	314	{
4ac97914	315	unsigned char buffer = 0;
1da177e4 LT	316
	317	if (0 != btv->i2c_rc)
	318	return -1;
	319	if (bttv_verbose && NULL != probe_for)
	320	printk(KERN_INFO "bttv%d: i2c: checking for %s @ 0x%02x... ",
	321	btv->c.nr,probe_for,addr);
4ac97914 MCC	322	btv->i2c_client.addr = addr >> 1;
4ac97914 MCC	323	if (1 != i2c_master_recv(&btv->i2c_client, &buffer, 1)) {
1da177e4 LT	324	if (NULL != probe_for) {
	325	if (bttv_verbose)
	326	printk("not found\n");
	327	} else
	328	printk(KERN_WARNING "bttv%d: i2c read 0x%x: error\n",
	329	btv->c.nr,addr);
4ac97914	330	return -1;
1da177e4 LT	331	}
	332	if (bttv_verbose && NULL != probe_for)
	333	printk("found\n");
4ac97914	334	return buffer;
1da177e4 LT	335	}
	336
	337	/* write I2C */
	338	int bttv_I2CWrite(struct bttv *btv, unsigned char addr, unsigned char b1,
4ac97914	339	unsigned char b2, int both)
1da177e4	340	{
4ac97914 MCC	341	unsigned char buffer[2];
4ac97914 MCC	342	int bytes = both ? 2 : 1;
1da177e4 LT	343
	344	if (0 != btv->i2c_rc)
	345	return -1;
4ac97914 MCC	346	btv->i2c_client.addr = addr >> 1;
	347	buffer[0] = b1;
	348	buffer[1] = b2;
	349	if (bytes != i2c_master_send(&btv->i2c_client, buffer, bytes))
1da177e4	350	return -1;
4ac97914	351	return 0;
1da177e4 LT	352	}
	353
	354	/* read EEPROM content */
	355	void __devinit bttv_readee(struct bttv btv, unsigned char eedata, int addr)
	356	{
5daf05fb GK	357	memset(eedata, 0, 256);
	358	if (0 != btv->i2c_rc)
	359	return;
1da177e4 LT	360	btv->i2c_client.addr = addr >> 1;
	361	tveeprom_read(&btv->i2c_client, eedata, 256);
	362	}
	363
	364	static char *i2c_devs[128] = {
24a70fdc	365	[ 0x1c >> 1 ] = "lgdt330x",
1da177e4 LT	366	[ 0x30 >> 1 ] = "IR (hauppauge)",
	367	[ 0x80 >> 1 ] = "msp34xx",
	368	[ 0x86 >> 1 ] = "tda9887",
	369	[ 0xa0 >> 1 ] = "eeprom",
	370	[ 0xc0 >> 1 ] = "tuner (analog)",
	371	[ 0xc2 >> 1 ] = "tuner (analog)",
	372	};
	373
	374	static void do_i2c_scan(char name, struct i2c_client c)
	375	{
	376	unsigned char buf;
	377	int i,rc;
	378
53c4e955	379	for (i = 0; i < ARRAY_SIZE(i2c_devs); i++) {
1da177e4 LT	380	c->addr = i;
	381	rc = i2c_master_recv(c,&buf,0);
	382	if (rc < 0)
	383	continue;
	384	printk("%s: i2c scan: found device @ 0x%x [%s]\n",
	385	name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
	386	}
	387	}
	388
	389	/* init + register i2c algo-bit adapter */
	390	int __devinit init_bttv_i2c(struct bttv *btv)
	391	{
df9b5d4c	392	strlcpy(btv->i2c_client.name, "bttv internal", I2C_NAME_SIZE);
1da177e4 LT	393
	394	if (i2c_hw)
	395	btv->use_i2c_hw = 1;
	396	if (btv->use_i2c_hw) {
	397	/* bt878 */
df9b5d4c JD	398	strlcpy(btv->c.i2c_adap.name, "bt878",
	399	sizeof(btv->c.i2c_adap.name));
	400	btv->c.i2c_adap.id = I2C_HW_B_BT848; /* FIXME */
	401	btv->c.i2c_adap.algo = &bttv_algo;
1da177e4 LT	402	} else {
1da177e4 LT	403	/* bt848 */
141276b5 MCC	404	/* Prevents usage of invalid delay values */
	405	if (i2c_udelay<5)
	406	i2c_udelay=5;
141276b5	407
df9b5d4c JD	408	strlcpy(btv->c.i2c_adap.name, "bttv",
	409	sizeof(btv->c.i2c_adap.name));
	410	btv->c.i2c_adap.id = I2C_HW_B_BT848;
1da177e4 LT	411	memcpy(&btv->i2c_algo, &bttv_i2c_algo_bit_template,
1da177e4 LT	412	sizeof(bttv_i2c_algo_bit_template));
df9b5d4c	413	btv->i2c_algo.udelay = i2c_udelay;
1da177e4 LT	414	btv->i2c_algo.data = btv;
	415	btv->c.i2c_adap.algo_data = &btv->i2c_algo;
	416	}
df9b5d4c JD	417	btv->c.i2c_adap.owner = THIS_MODULE;
	418	btv->c.i2c_adap.class = I2C_CLASS_TV_ANALOG;
	419	btv->c.i2c_adap.client_register = attach_inform;
1da177e4 LT	420
	421	btv->c.i2c_adap.dev.parent = &btv->c.pci->dev;
	422	snprintf(btv->c.i2c_adap.name, sizeof(btv->c.i2c_adap.name),
	423	"bt%d #%d [%s]", btv->id, btv->c.nr,
	424	btv->use_i2c_hw ? "hw" : "sw");
	425
4ac97914 MCC	426	i2c_set_adapdata(&btv->c.i2c_adap, btv);
4ac97914 MCC	427	btv->i2c_client.adapter = &btv->c.i2c_adap;
1da177e4	428
1da177e4 LT	429	if (bttv_tvcards[btv->c.type].no_video)
	430	btv->c.i2c_adap.class &= ~I2C_CLASS_TV_ANALOG;
	431	if (bttv_tvcards[btv->c.type].has_dvb)
	432	btv->c.i2c_adap.class \|= I2C_CLASS_TV_DIGITAL;
1da177e4 LT	433
	434	if (btv->use_i2c_hw) {
	435	btv->i2c_rc = i2c_add_adapter(&btv->c.i2c_adap);
	436	} else {
	437	bttv_bit_setscl(btv,1);
	438	bttv_bit_setsda(btv,1);
	439	btv->i2c_rc = i2c_bit_add_bus(&btv->c.i2c_adap);
	440	}
	441	if (0 == btv->i2c_rc && i2c_scan)
	442	do_i2c_scan(btv->c.name,&btv->i2c_client);
	443	return btv->i2c_rc;
	444	}
	445
	446	int __devexit fini_bttv_i2c(struct bttv *btv)
	447	{
	448	if (0 != btv->i2c_rc)
	449	return 0;
	450
3269711b	451	return i2c_del_adapter(&btv->c.i2c_adap);
1da177e4 LT	452	}
	453
	454	/*
	455	* Local variables:
	456	* c-basic-offset: 8
	457	* End:
	458	*/