[mirror_ubuntu-zesty-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 struct i2c_algo_bit_data bttv_i2c_algo_bit_template;
static struct i2c_adapter bttv_i2c_adap_sw_template;
static struct i2c_adapter bttv_i2c_adap_hw_template;
static struct i2c_client bttv_i2c_client_template;

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 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,
};

static struct i2c_adapter bttv_i2c_adap_sw_template = {
	.owner             = THIS_MODULE,
	.class             = I2C_CLASS_TV_ANALOG,
	.name              = "bttv",
	.id                = I2C_HW_B_BT848,
	.client_register   = attach_inform,
};

/* ----------------------------------------------------------------------- */
/* 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 struct i2c_algorithm bttv_algo = {
	.master_xfer   = bttv_i2c_xfer,
	.functionality = functionality,
};

static struct i2c_adapter bttv_i2c_adap_hw_template = {
	.owner             = THIS_MODULE,
	.class         = I2C_CLASS_TV_ANALOG,
	.name          = "bt878",
	.id            = I2C_HW_B_BT848 /* FIXME */,
	.algo          = &bttv_algo,
	.client_register = attach_inform,
};

/* ----------------------------------------------------------------------- */
/* 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 != UNSET) {
		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);
}

static struct i2c_client bttv_i2c_client_template = {
	.name	= "bttv internal",
};


/* 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)
{
	memcpy(&btv->i2c_client, &bttv_i2c_client_template,
	       sizeof(bttv_i2c_client_template));

	if (i2c_hw)
		btv->use_i2c_hw = 1;
	if (btv->use_i2c_hw) {
		/* bt878 */
		memcpy(&btv->c.i2c_adap, &bttv_i2c_adap_hw_template,
		       sizeof(bttv_i2c_adap_hw_template));
	} else {
		/* bt848 */
	/* Prevents usage of invalid delay values */
		if (i2c_udelay<5)
			i2c_udelay=5;
		bttv_i2c_algo_bit_template.udelay=i2c_udelay;

		memcpy(&btv->c.i2c_adap, &bttv_i2c_adap_sw_template,
		       sizeof(bttv_i2c_adap_sw_template));
		memcpy(&btv->i2c_algo, &bttv_i2c_algo_bit_template,
		       sizeof(bttv_i2c_algo_bit_template));
		btv->i2c_algo.data = btv;
		btv->c.i2c_adap.algo_data = &btv->i2c_algo;
	}

	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 LT	38
	39	static struct i2c_algo_bit_data bttv_i2c_algo_bit_template;
	40	static struct i2c_adapter bttv_i2c_adap_sw_template;
	41	static struct i2c_adapter bttv_i2c_adap_hw_template;
	42	static struct i2c_client bttv_i2c_client_template;
	43
	44	static int attach_inform(struct i2c_client *client);
	45
a5ed425c MCC	46	static int i2c_debug;
	47	static int i2c_hw;
	48	static int i2c_scan;
1da177e4	49	module_param(i2c_debug, int, 0644);
141276b5	50	MODULE_PARM_DESC(i2c_hw,"configure i2c debug level");
1da177e4	51	module_param(i2c_hw, int, 0444);
141276b5 MCC	52	MODULE_PARM_DESC(i2c_hw,"force use of hardware i2c support, "
141276b5 MCC	53	"instead of software bitbang");
1da177e4 LT	54	module_param(i2c_scan, int, 0444);
	55	MODULE_PARM_DESC(i2c_scan,"scan i2c bus at insmod time");
	56
141276b5 MCC	57	static unsigned int i2c_udelay = 5;
	58	module_param(i2c_udelay, int, 0444);
	59	MODULE_PARM_DESC(i2c_udelay,"soft i2c delay at insmod time, in usecs "
	60	"(should be 5 or higher). Lower value means higher bus speed.");
	61
1da177e4 LT	62	/* ----------------------------------------------------------------------- */
	63	/* I2C functions - bitbanging adapter (software i2c) */
	64
	65	static void bttv_bit_setscl(void *data, int state)
	66	{
	67	struct bttv btv = (struct bttv)data;
	68
	69	if (state)
	70	btv->i2c_state \|= 0x02;
	71	else
	72	btv->i2c_state &= ~0x02;
	73	btwrite(btv->i2c_state, BT848_I2C);
	74	btread(BT848_I2C);
	75	}
	76
	77	static void bttv_bit_setsda(void *data, int state)
	78	{
	79	struct bttv btv = (struct bttv)data;
	80
	81	if (state)
	82	btv->i2c_state \|= 0x01;
	83	else
	84	btv->i2c_state &= ~0x01;
	85	btwrite(btv->i2c_state, BT848_I2C);
	86	btread(BT848_I2C);
	87	}
	88
	89	static int bttv_bit_getscl(void *data)
	90	{
	91	struct bttv btv = (struct bttv)data;
	92	int state;
	93
	94	state = btread(BT848_I2C) & 0x02 ? 1 : 0;
	95	return state;
	96	}
	97
	98	static int bttv_bit_getsda(void *data)
	99	{
	100	struct bttv btv = (struct bttv)data;
	101	int state;
	102
	103	state = btread(BT848_I2C) & 0x01;
	104	return state;
	105	}
	106
	107	static struct i2c_algo_bit_data bttv_i2c_algo_bit_template = {
	108	.setsda = bttv_bit_setsda,
	109	.setscl = bttv_bit_setscl,
	110	.getsda = bttv_bit_getsda,
	111	.getscl = bttv_bit_getscl,
	112	.udelay = 16,
1da177e4 LT	113	.timeout = 200,
	114	};
	115
	116	static struct i2c_adapter bttv_i2c_adap_sw_template = {
	117	.owner = THIS_MODULE,
1da177e4	118	.class = I2C_CLASS_TV_ANALOG,
cab462f7	119	.name = "bttv",
1da177e4 LT	120	.id = I2C_HW_B_BT848,
	121	.client_register = attach_inform,
	122	};
	123
	124	/* ----------------------------------------------------------------------- */
	125	/* I2C functions - hardware i2c */
	126
1da177e4 LT	127	static u32 functionality(struct i2c_adapter *adap)
	128	{
	129	return I2C_FUNC_SMBUS_EMUL;
	130	}
	131
	132	static int
	133	bttv_i2c_wait_done(struct bttv *btv)
	134	{
1da177e4 LT	135	int rc = 0;
1da177e4 LT	136
fc9d53af MA	137	/* timeout */
	138	if (wait_event_interruptible_timeout(btv->i2c_queue,
	139	btv->i2c_done, msecs_to_jiffies(85)) == -ERESTARTSYS)
	140
	141	rc = -EIO;
1da177e4	142
1da177e4 LT	143	if (btv->i2c_done & BT848_INT_RACK)
	144	rc = 1;
	145	btv->i2c_done = 0;
	146	return rc;
	147	}
	148
	149	#define I2C_HW (BT878_I2C_MODE \| BT848_I2C_SYNC \|\
	150	BT848_I2C_SCL \| BT848_I2C_SDA)
	151
	152	static int
	153	bttv_i2c_sendbytes(struct bttv btv, const struct i2c_msg msg, int last)
	154	{
	155	u32 xmit;
	156	int retval,cnt;
	157
	158	/* sanity checks */
	159	if (0 == msg->len)
	160	return -EINVAL;
	161
	162	/* start, address + first byte */
	163	xmit = (msg->addr << 25) \| (msg->buf[0] << 16) \| I2C_HW;
	164	if (msg->len > 1 \|\| !last)
	165	xmit \|= BT878_I2C_NOSTOP;
	166	btwrite(xmit, BT848_I2C);
	167	retval = bttv_i2c_wait_done(btv);
	168	if (retval < 0)
	169	goto err;
	170	if (retval == 0)
	171	goto eio;
	172	if (i2c_debug) {
	173	printk(" <W %02x %02x", msg->addr << 1, msg->buf[0]);
	174	if (!(xmit & BT878_I2C_NOSTOP))
	175	printk(" >\n");
	176	}
	177
	178	for (cnt = 1; cnt < msg->len; cnt++ ) {
	179	/* following bytes */
	180	xmit = (msg->buf[cnt] << 24) \| I2C_HW \| BT878_I2C_NOSTART;
	181	if (cnt < msg->len-1 \|\| !last)
	182	xmit \|= BT878_I2C_NOSTOP;
	183	btwrite(xmit, BT848_I2C);
	184	retval = bttv_i2c_wait_done(btv);
	185	if (retval < 0)
	186	goto err;
	187	if (retval == 0)
	188	goto eio;
	189	if (i2c_debug) {
	190	printk(" %02x", msg->buf[cnt]);
	191	if (!(xmit & BT878_I2C_NOSTOP))
	192	printk(" >\n");
	193	}
	194	}
	195	return msg->len;
	196
	197	eio:
	198	retval = -EIO;
	199	err:
	200	if (i2c_debug)
	201	printk(" ERR: %d\n",retval);
	202	return retval;
	203	}
	204
	205	static int
	206	bttv_i2c_readbytes(struct bttv btv, const struct i2c_msg msg, int last)
207	{
208	u32 xmit;
209	u32 cnt;
210	int retval;
211
212	for(cnt = 0; cnt < msg->len; cnt++) {
213	xmit = (msg->addr << 25) \| (1 << 24) \| I2C_HW;
214	if (cnt < msg->len-1)
215	xmit \|= BT848_I2C_W3B;
216	if (cnt < msg->len-1 \|\| !last)
217	xmit \|= BT878_I2C_NOSTOP;
218	if (cnt)
219	xmit \|= BT878_I2C_NOSTART;
220	btwrite(xmit, BT848_I2C);
221	retval = bttv_i2c_wait_done(btv);
222	if (retval < 0)
223	goto err;
224	if (retval == 0)
225	goto eio;
226	msg->buf[cnt] = ((u32)btread(BT848_I2C) >> 8) & 0xff;
227	if (i2c_debug) {
228	if (!(xmit & BT878_I2C_NOSTART))
229	printk(" <R %02x", (msg->addr << 1) +1);
230	printk(" =%02x", msg->buf[cnt]);
231	if (!(xmit & BT878_I2C_NOSTOP))
232	printk(" >\n");
233	}
234	}
235	return msg->len;
236
237	eio:
238	retval = -EIO;
239	err:
240	if (i2c_debug)
241	printk(" ERR: %d\n",retval);
4ac97914	242	return retval;
1da177e4 LT	243	}
	244
	245	static int bttv_i2c_xfer(struct i2c_adapter i2c_adap, struct i2c_msg msgs, int num)
	246	{
	247	struct bttv *btv = i2c_get_adapdata(i2c_adap);
	248	int retval = 0;
	249	int i;
	250
	251	if (i2c_debug)
	252	printk("bt-i2c:");
	253	btwrite(BT848_INT_I2CDONE\|BT848_INT_RACK, BT848_INT_STAT);
	254	for (i = 0 ; i < num; i++) {
	255	if (msgs[i].flags & I2C_M_RD) {
	256	/* read */
	257	retval = bttv_i2c_readbytes(btv, &msgs[i], i+1 == num);
	258	if (retval < 0)
	259	goto err;
	260	} else {
	261	/* write */
	262	retval = bttv_i2c_sendbytes(btv, &msgs[i], i+1 == num);
	263	if (retval < 0)
	264	goto err;
	265	}
	266	}
	267	return num;
	268
	269	err:
	270	return retval;
	271	}
	272
	273	static struct i2c_algorithm bttv_algo = {
1da177e4	274	.master_xfer = bttv_i2c_xfer,
1da177e4 LT	275	.functionality = functionality,
	276	};
	277
	278	static struct i2c_adapter bttv_i2c_adap_hw_template = {
cab462f7	279	.owner = THIS_MODULE,
1da177e4	280	.class = I2C_CLASS_TV_ANALOG,
fae91e72	281	.name = "bt878",
c7a46533	282	.id = I2C_HW_B_BT848 /* FIXME */,
1da177e4 LT	283	.algo = &bttv_algo,
	284	.client_register = attach_inform,
	285	};
	286
	287	/* ----------------------------------------------------------------------- */
	288	/* I2C functions - common stuff */
	289
	290	static int attach_inform(struct i2c_client *client)
	291	{
4ac97914	292	struct bttv *btv = i2c_get_adapdata(client->adapter);
291d1d73 RC	293	int addr=ADDR_UNSET;
	294
	295
7418f346 LB	296	if (ADDR_UNSET != bttv_tvcards[btv->c.type].tuner_addr)
7418f346 LB	297	addr = bttv_tvcards[btv->c.type].tuner_addr;
aa8d5e72	298
1da177e4	299
fa9846a8 MCC	300	if (bttv_debug)
fa9846a8 MCC	301	printk(KERN_DEBUG "bttv%d: %s i2c attach [addr=0x%x,client=%s]\n",
604f28e2	302	btv->c.nr, client->driver->driver.name, client->addr,
fae91e72	303	client->name);
fa9846a8 MCC	304	if (!client->driver->command)
	305	return 0;
	306
8bf2f8e7 HV	307	if (client->driver->id == I2C_DRIVERID_MSP3400)
	308	btv->i2c_msp34xx_client = client;
	309	if (client->driver->id == I2C_DRIVERID_TVAUDIO)
	310	btv->i2c_tvaudio_client = client;
fa9846a8	311	if (btv->tuner_type != UNSET) {
4ac97914	312	struct tuner_setup tun_setup;
fa9846a8	313
291d1d73 RC	314	if ((addr==ADDR_UNSET) \|\|
	315	(addr==client->addr)) {
	316
7418f346 LB	317	tun_setup.mode_mask = T_ANALOG_TV \| T_DIGITAL_TV \| T_RADIO;
7418f346 LB	318	tun_setup.type = btv->tuner_type;
291d1d73	319	tun_setup.addr = addr;
7418f346	320	bttv_call_i2c_clients(btv, TUNER_SET_TYPE_ADDR, &tun_setup);
85a2eb07	321	}
291d1d73	322
fa9846a8 MCC	323	}
fa9846a8 MCC	324
4ac97914	325	return 0;
1da177e4 LT	326	}
	327
	328	void bttv_call_i2c_clients(struct bttv btv, unsigned int cmd, void arg)
	329	{
	330	if (0 != btv->i2c_rc)
	331	return;
	332	i2c_clients_command(&btv->c.i2c_adap, cmd, arg);
	333	}
	334
	335	static struct i2c_client bttv_i2c_client_template = {
fae91e72	336	.name = "bttv internal",
1da177e4 LT	337	};
	338
	339
	340	/* read I2C */
	341	int bttv_I2CRead(struct bttv btv, unsigned char addr, char probe_for)
	342	{
4ac97914	343	unsigned char buffer = 0;
1da177e4 LT	344
	345	if (0 != btv->i2c_rc)
	346	return -1;
	347	if (bttv_verbose && NULL != probe_for)
	348	printk(KERN_INFO "bttv%d: i2c: checking for %s @ 0x%02x... ",
	349	btv->c.nr,probe_for,addr);
4ac97914 MCC	350	btv->i2c_client.addr = addr >> 1;
4ac97914 MCC	351	if (1 != i2c_master_recv(&btv->i2c_client, &buffer, 1)) {
1da177e4 LT	352	if (NULL != probe_for) {
	353	if (bttv_verbose)
	354	printk("not found\n");
	355	} else
	356	printk(KERN_WARNING "bttv%d: i2c read 0x%x: error\n",
	357	btv->c.nr,addr);
4ac97914	358	return -1;
1da177e4 LT	359	}
	360	if (bttv_verbose && NULL != probe_for)
	361	printk("found\n");
4ac97914	362	return buffer;
1da177e4 LT	363	}
	364
	365	/* write I2C */
	366	int bttv_I2CWrite(struct bttv *btv, unsigned char addr, unsigned char b1,
4ac97914	367	unsigned char b2, int both)
1da177e4	368	{
4ac97914 MCC	369	unsigned char buffer[2];
4ac97914 MCC	370	int bytes = both ? 2 : 1;
1da177e4 LT	371
	372	if (0 != btv->i2c_rc)
	373	return -1;
4ac97914 MCC	374	btv->i2c_client.addr = addr >> 1;
	375	buffer[0] = b1;
	376	buffer[1] = b2;
	377	if (bytes != i2c_master_send(&btv->i2c_client, buffer, bytes))
1da177e4	378	return -1;
4ac97914	379	return 0;
1da177e4 LT	380	}
	381
	382	/* read EEPROM content */
	383	void __devinit bttv_readee(struct bttv btv, unsigned char eedata, int addr)
	384	{
5daf05fb GK	385	memset(eedata, 0, 256);
	386	if (0 != btv->i2c_rc)
	387	return;
1da177e4 LT	388	btv->i2c_client.addr = addr >> 1;
	389	tveeprom_read(&btv->i2c_client, eedata, 256);
	390	}
	391
	392	static char *i2c_devs[128] = {
24a70fdc	393	[ 0x1c >> 1 ] = "lgdt330x",
1da177e4 LT	394	[ 0x30 >> 1 ] = "IR (hauppauge)",
	395	[ 0x80 >> 1 ] = "msp34xx",
	396	[ 0x86 >> 1 ] = "tda9887",
	397	[ 0xa0 >> 1 ] = "eeprom",
	398	[ 0xc0 >> 1 ] = "tuner (analog)",
	399	[ 0xc2 >> 1 ] = "tuner (analog)",
	400	};
	401
	402	static void do_i2c_scan(char name, struct i2c_client c)
	403	{
	404	unsigned char buf;
	405	int i,rc;
	406
53c4e955	407	for (i = 0; i < ARRAY_SIZE(i2c_devs); i++) {
1da177e4 LT	408	c->addr = i;
	409	rc = i2c_master_recv(c,&buf,0);
	410	if (rc < 0)
	411	continue;
	412	printk("%s: i2c scan: found device @ 0x%x [%s]\n",
	413	name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
	414	}
	415	}
	416
	417	/* init + register i2c algo-bit adapter */
	418	int __devinit init_bttv_i2c(struct bttv *btv)
	419	{
	420	memcpy(&btv->i2c_client, &bttv_i2c_client_template,
	421	sizeof(bttv_i2c_client_template));
	422
	423	if (i2c_hw)
	424	btv->use_i2c_hw = 1;
	425	if (btv->use_i2c_hw) {
	426	/* bt878 */
	427	memcpy(&btv->c.i2c_adap, &bttv_i2c_adap_hw_template,
	428	sizeof(bttv_i2c_adap_hw_template));
	429	} else {
	430	/* bt848 */
141276b5 MCC	431	/* Prevents usage of invalid delay values */
	432	if (i2c_udelay<5)
	433	i2c_udelay=5;
	434	bttv_i2c_algo_bit_template.udelay=i2c_udelay;
	435
1da177e4 LT	436	memcpy(&btv->c.i2c_adap, &bttv_i2c_adap_sw_template,
	437	sizeof(bttv_i2c_adap_sw_template));
	438	memcpy(&btv->i2c_algo, &bttv_i2c_algo_bit_template,
	439	sizeof(bttv_i2c_algo_bit_template));
	440	btv->i2c_algo.data = btv;
	441	btv->c.i2c_adap.algo_data = &btv->i2c_algo;
	442	}
	443
	444	btv->c.i2c_adap.dev.parent = &btv->c.pci->dev;
	445	snprintf(btv->c.i2c_adap.name, sizeof(btv->c.i2c_adap.name),
	446	"bt%d #%d [%s]", btv->id, btv->c.nr,
	447	btv->use_i2c_hw ? "hw" : "sw");
	448
4ac97914 MCC	449	i2c_set_adapdata(&btv->c.i2c_adap, btv);
4ac97914 MCC	450	btv->i2c_client.adapter = &btv->c.i2c_adap;
1da177e4	451
1da177e4 LT	452	if (bttv_tvcards[btv->c.type].no_video)
	453	btv->c.i2c_adap.class &= ~I2C_CLASS_TV_ANALOG;
	454	if (bttv_tvcards[btv->c.type].has_dvb)
	455	btv->c.i2c_adap.class \|= I2C_CLASS_TV_DIGITAL;
1da177e4 LT	456
	457	if (btv->use_i2c_hw) {
	458	btv->i2c_rc = i2c_add_adapter(&btv->c.i2c_adap);
	459	} else {
	460	bttv_bit_setscl(btv,1);
	461	bttv_bit_setsda(btv,1);
	462	btv->i2c_rc = i2c_bit_add_bus(&btv->c.i2c_adap);
	463	}
	464	if (0 == btv->i2c_rc && i2c_scan)
	465	do_i2c_scan(btv->c.name,&btv->i2c_client);
	466	return btv->i2c_rc;
	467	}
	468
	469	int __devexit fini_bttv_i2c(struct bttv *btv)
	470	{
	471	if (0 != btv->i2c_rc)
	472	return 0;
	473
3269711b	474	return i2c_del_adapter(&btv->c.i2c_adap);
1da177e4 LT	475	}
	476
	477	/*
	478	* Local variables:
	479	* c-basic-offset: 8
	480	* End:
	481	*/