[GitHub/mt8127/android_kernel_alcatel_ttab.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/moduleparam.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 int algo_control(struct i2c_adapter *adapter,
			unsigned int cmd, unsigned long arg)
{
	return 0;
}

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,
	.algo_control  = algo_control,
	.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 < 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 __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>
	31	#include <linux/moduleparam.h>
	32	#include <linux/init.h>
	33	#include <linux/delay.h>
1da177e4 LT	34
1da177e4 LT	35	#include "bttvp.h"
5e453dc7	36	#include <media/v4l2-common.h>
b5b8ab8d MCC	37	#include <linux/jiffies.h>
b5b8ab8d MCC	38	#include <asm/io.h>
1da177e4 LT	39
	40	static struct i2c_algo_bit_data bttv_i2c_algo_bit_template;
	41	static struct i2c_adapter bttv_i2c_adap_sw_template;
	42	static struct i2c_adapter bttv_i2c_adap_hw_template;
	43	static struct i2c_client bttv_i2c_client_template;
	44
	45	static int attach_inform(struct i2c_client *client);
	46
a5ed425c MCC	47	static int i2c_debug;
	48	static int i2c_hw;
	49	static int i2c_scan;
1da177e4	50	module_param(i2c_debug, int, 0644);
141276b5	51	MODULE_PARM_DESC(i2c_hw,"configure i2c debug level");
1da177e4	52	module_param(i2c_hw, int, 0444);
141276b5 MCC	53	MODULE_PARM_DESC(i2c_hw,"force use of hardware i2c support, "
141276b5 MCC	54	"instead of software bitbang");
1da177e4 LT	55	module_param(i2c_scan, int, 0444);
	56	MODULE_PARM_DESC(i2c_scan,"scan i2c bus at insmod time");
	57
141276b5 MCC	58	static unsigned int i2c_udelay = 5;
	59	module_param(i2c_udelay, int, 0444);
	60	MODULE_PARM_DESC(i2c_udelay,"soft i2c delay at insmod time, in usecs "
	61	"(should be 5 or higher). Lower value means higher bus speed.");
	62
1da177e4 LT	63	/* ----------------------------------------------------------------------- */
	64	/* I2C functions - bitbanging adapter (software i2c) */
	65
	66	static void bttv_bit_setscl(void *data, int state)
	67	{
	68	struct bttv btv = (struct bttv)data;
	69
	70	if (state)
	71	btv->i2c_state \|= 0x02;
	72	else
	73	btv->i2c_state &= ~0x02;
	74	btwrite(btv->i2c_state, BT848_I2C);
	75	btread(BT848_I2C);
	76	}
	77
	78	static void bttv_bit_setsda(void *data, int state)
	79	{
	80	struct bttv btv = (struct bttv)data;
	81
	82	if (state)
	83	btv->i2c_state \|= 0x01;
	84	else
	85	btv->i2c_state &= ~0x01;
	86	btwrite(btv->i2c_state, BT848_I2C);
	87	btread(BT848_I2C);
	88	}
	89
	90	static int bttv_bit_getscl(void *data)
	91	{
	92	struct bttv btv = (struct bttv)data;
	93	int state;
	94
	95	state = btread(BT848_I2C) & 0x02 ? 1 : 0;
	96	return state;
	97	}
	98
	99	static int bttv_bit_getsda(void *data)
	100	{
	101	struct bttv btv = (struct bttv)data;
	102	int state;
	103
	104	state = btread(BT848_I2C) & 0x01;
	105	return state;
	106	}
	107
	108	static struct i2c_algo_bit_data bttv_i2c_algo_bit_template = {
	109	.setsda = bttv_bit_setsda,
	110	.setscl = bttv_bit_setscl,
	111	.getsda = bttv_bit_getsda,
	112	.getscl = bttv_bit_getscl,
	113	.udelay = 16,
1da177e4 LT	114	.timeout = 200,
	115	};
	116
	117	static struct i2c_adapter bttv_i2c_adap_sw_template = {
	118	.owner = THIS_MODULE,
1da177e4	119	.class = I2C_CLASS_TV_ANALOG,
cab462f7	120	.name = "bttv",
1da177e4 LT	121	.id = I2C_HW_B_BT848,
	122	.client_register = attach_inform,
	123	};
	124
	125	/* ----------------------------------------------------------------------- */
	126	/* I2C functions - hardware i2c */
	127
	128	static int algo_control(struct i2c_adapter *adapter,
	129	unsigned int cmd, unsigned long arg)
	130	{
	131	return 0;
	132	}
	133
	134	static u32 functionality(struct i2c_adapter *adap)
	135	{
	136	return I2C_FUNC_SMBUS_EMUL;
	137	}
	138
	139	static int
	140	bttv_i2c_wait_done(struct bttv *btv)
	141	{
1da177e4 LT	142	int rc = 0;
1da177e4 LT	143
fc9d53af MA	144	/* timeout */
	145	if (wait_event_interruptible_timeout(btv->i2c_queue,
	146	btv->i2c_done, msecs_to_jiffies(85)) == -ERESTARTSYS)
	147
	148	rc = -EIO;
1da177e4	149
1da177e4 LT	150	if (btv->i2c_done & BT848_INT_RACK)
	151	rc = 1;
	152	btv->i2c_done = 0;
	153	return rc;
	154	}
	155
	156	#define I2C_HW (BT878_I2C_MODE \| BT848_I2C_SYNC \|\
	157	BT848_I2C_SCL \| BT848_I2C_SDA)
	158
	159	static int
	160	bttv_i2c_sendbytes(struct bttv btv, const struct i2c_msg msg, int last)
	161	{
	162	u32 xmit;
	163	int retval,cnt;
	164
	165	/* sanity checks */
	166	if (0 == msg->len)
	167	return -EINVAL;
	168
	169	/* start, address + first byte */
	170	xmit = (msg->addr << 25) \| (msg->buf[0] << 16) \| I2C_HW;
	171	if (msg->len > 1 \|\| !last)
	172	xmit \|= BT878_I2C_NOSTOP;
	173	btwrite(xmit, BT848_I2C);
	174	retval = bttv_i2c_wait_done(btv);
	175	if (retval < 0)
	176	goto err;
	177	if (retval == 0)
	178	goto eio;
	179	if (i2c_debug) {
	180	printk(" <W %02x %02x", msg->addr << 1, msg->buf[0]);
	181	if (!(xmit & BT878_I2C_NOSTOP))
	182	printk(" >\n");
	183	}
	184
	185	for (cnt = 1; cnt < msg->len; cnt++ ) {
	186	/* following bytes */
	187	xmit = (msg->buf[cnt] << 24) \| I2C_HW \| BT878_I2C_NOSTART;
	188	if (cnt < msg->len-1 \|\| !last)
	189	xmit \|= BT878_I2C_NOSTOP;
	190	btwrite(xmit, BT848_I2C);
	191	retval = bttv_i2c_wait_done(btv);
	192	if (retval < 0)
	193	goto err;
	194	if (retval == 0)
	195	goto eio;
	196	if (i2c_debug) {
	197	printk(" %02x", msg->buf[cnt]);
	198	if (!(xmit & BT878_I2C_NOSTOP))
	199	printk(" >\n");
	200	}
	201	}
	202	return msg->len;
	203
	204	eio:
	205	retval = -EIO;
	206	err:
	207	if (i2c_debug)
	208	printk(" ERR: %d\n",retval);
	209	return retval;
	210	}
	211
	212	static int
	213	bttv_i2c_readbytes(struct bttv btv, const struct i2c_msg msg, int last)
214	{
215	u32 xmit;
216	u32 cnt;
217	int retval;
218
219	for(cnt = 0; cnt < msg->len; cnt++) {
220	xmit = (msg->addr << 25) \| (1 << 24) \| I2C_HW;
221	if (cnt < msg->len-1)
222	xmit \|= BT848_I2C_W3B;
223	if (cnt < msg->len-1 \|\| !last)
224	xmit \|= BT878_I2C_NOSTOP;
225	if (cnt)
226	xmit \|= BT878_I2C_NOSTART;
227	btwrite(xmit, BT848_I2C);
228	retval = bttv_i2c_wait_done(btv);
229	if (retval < 0)
230	goto err;
231	if (retval == 0)
232	goto eio;
233	msg->buf[cnt] = ((u32)btread(BT848_I2C) >> 8) & 0xff;
234	if (i2c_debug) {
235	if (!(xmit & BT878_I2C_NOSTART))
236	printk(" <R %02x", (msg->addr << 1) +1);
237	printk(" =%02x", msg->buf[cnt]);
238	if (!(xmit & BT878_I2C_NOSTOP))
239	printk(" >\n");
240	}
241	}
242	return msg->len;
243
244	eio:
245	retval = -EIO;
246	err:
247	if (i2c_debug)
248	printk(" ERR: %d\n",retval);
4ac97914	249	return retval;
1da177e4 LT	250	}
	251
	252	static int bttv_i2c_xfer(struct i2c_adapter i2c_adap, struct i2c_msg msgs, int num)
	253	{
	254	struct bttv *btv = i2c_get_adapdata(i2c_adap);
	255	int retval = 0;
	256	int i;
	257
	258	if (i2c_debug)
	259	printk("bt-i2c:");
	260	btwrite(BT848_INT_I2CDONE\|BT848_INT_RACK, BT848_INT_STAT);
	261	for (i = 0 ; i < num; i++) {
	262	if (msgs[i].flags & I2C_M_RD) {
	263	/* read */
	264	retval = bttv_i2c_readbytes(btv, &msgs[i], i+1 == num);
	265	if (retval < 0)
	266	goto err;
	267	} else {
	268	/* write */
	269	retval = bttv_i2c_sendbytes(btv, &msgs[i], i+1 == num);
	270	if (retval < 0)
	271	goto err;
	272	}
	273	}
	274	return num;
	275
	276	err:
	277	return retval;
	278	}
	279
	280	static struct i2c_algorithm bttv_algo = {
1da177e4 LT	281	.master_xfer = bttv_i2c_xfer,
	282	.algo_control = algo_control,
	283	.functionality = functionality,
	284	};
	285
	286	static struct i2c_adapter bttv_i2c_adap_hw_template = {
cab462f7	287	.owner = THIS_MODULE,
1da177e4	288	.class = I2C_CLASS_TV_ANALOG,
fae91e72	289	.name = "bt878",
c7a46533	290	.id = I2C_HW_B_BT848 /* FIXME */,
1da177e4 LT	291	.algo = &bttv_algo,
	292	.client_register = attach_inform,
	293	};
	294
	295	/* ----------------------------------------------------------------------- */
	296	/* I2C functions - common stuff */
	297
	298	static int attach_inform(struct i2c_client *client)
	299	{
4ac97914	300	struct bttv *btv = i2c_get_adapdata(client->adapter);
291d1d73 RC	301	int addr=ADDR_UNSET;
	302
	303
7418f346 LB	304	if (ADDR_UNSET != bttv_tvcards[btv->c.type].tuner_addr)
7418f346 LB	305	addr = bttv_tvcards[btv->c.type].tuner_addr;
aa8d5e72	306
1da177e4	307
fa9846a8 MCC	308	if (bttv_debug)
fa9846a8 MCC	309	printk(KERN_DEBUG "bttv%d: %s i2c attach [addr=0x%x,client=%s]\n",
604f28e2	310	btv->c.nr, client->driver->driver.name, client->addr,
fae91e72	311	client->name);
fa9846a8 MCC	312	if (!client->driver->command)
	313	return 0;
	314
8bf2f8e7 HV	315	if (client->driver->id == I2C_DRIVERID_MSP3400)
	316	btv->i2c_msp34xx_client = client;
	317	if (client->driver->id == I2C_DRIVERID_TVAUDIO)
	318	btv->i2c_tvaudio_client = client;
fa9846a8	319	if (btv->tuner_type != UNSET) {
4ac97914	320	struct tuner_setup tun_setup;
fa9846a8	321
291d1d73 RC	322	if ((addr==ADDR_UNSET) \|\|
	323	(addr==client->addr)) {
	324
7418f346 LB	325	tun_setup.mode_mask = T_ANALOG_TV \| T_DIGITAL_TV \| T_RADIO;
7418f346 LB	326	tun_setup.type = btv->tuner_type;
291d1d73	327	tun_setup.addr = addr;
7418f346	328	bttv_call_i2c_clients(btv, TUNER_SET_TYPE_ADDR, &tun_setup);
85a2eb07	329	}
291d1d73	330
fa9846a8 MCC	331	}
fa9846a8 MCC	332
4ac97914	333	return 0;
1da177e4 LT	334	}
	335
	336	void bttv_call_i2c_clients(struct bttv btv, unsigned int cmd, void arg)
	337	{
	338	if (0 != btv->i2c_rc)
	339	return;
	340	i2c_clients_command(&btv->c.i2c_adap, cmd, arg);
	341	}
	342
	343	static struct i2c_client bttv_i2c_client_template = {
fae91e72	344	.name = "bttv internal",
1da177e4 LT	345	};
	346
	347
	348	/* read I2C */
	349	int bttv_I2CRead(struct bttv btv, unsigned char addr, char probe_for)
	350	{
4ac97914	351	unsigned char buffer = 0;
1da177e4 LT	352
	353	if (0 != btv->i2c_rc)
	354	return -1;
	355	if (bttv_verbose && NULL != probe_for)
	356	printk(KERN_INFO "bttv%d: i2c: checking for %s @ 0x%02x... ",
	357	btv->c.nr,probe_for,addr);
4ac97914 MCC	358	btv->i2c_client.addr = addr >> 1;
4ac97914 MCC	359	if (1 != i2c_master_recv(&btv->i2c_client, &buffer, 1)) {
1da177e4 LT	360	if (NULL != probe_for) {
	361	if (bttv_verbose)
	362	printk("not found\n");
	363	} else
	364	printk(KERN_WARNING "bttv%d: i2c read 0x%x: error\n",
	365	btv->c.nr,addr);
4ac97914	366	return -1;
1da177e4 LT	367	}
	368	if (bttv_verbose && NULL != probe_for)
	369	printk("found\n");
4ac97914	370	return buffer;
1da177e4 LT	371	}
	372
	373	/* write I2C */
	374	int bttv_I2CWrite(struct bttv *btv, unsigned char addr, unsigned char b1,
4ac97914	375	unsigned char b2, int both)
1da177e4	376	{
4ac97914 MCC	377	unsigned char buffer[2];
4ac97914 MCC	378	int bytes = both ? 2 : 1;
1da177e4 LT	379
	380	if (0 != btv->i2c_rc)
	381	return -1;
4ac97914 MCC	382	btv->i2c_client.addr = addr >> 1;
	383	buffer[0] = b1;
	384	buffer[1] = b2;
	385	if (bytes != i2c_master_send(&btv->i2c_client, buffer, bytes))
1da177e4	386	return -1;
4ac97914	387	return 0;
1da177e4 LT	388	}
	389
	390	/* read EEPROM content */
	391	void __devinit bttv_readee(struct bttv btv, unsigned char eedata, int addr)
	392	{
5daf05fb GK	393	memset(eedata, 0, 256);
	394	if (0 != btv->i2c_rc)
	395	return;
1da177e4 LT	396	btv->i2c_client.addr = addr >> 1;
	397	tveeprom_read(&btv->i2c_client, eedata, 256);
	398	}
	399
	400	static char *i2c_devs[128] = {
24a70fdc	401	[ 0x1c >> 1 ] = "lgdt330x",
1da177e4 LT	402	[ 0x30 >> 1 ] = "IR (hauppauge)",
	403	[ 0x80 >> 1 ] = "msp34xx",
	404	[ 0x86 >> 1 ] = "tda9887",
	405	[ 0xa0 >> 1 ] = "eeprom",
	406	[ 0xc0 >> 1 ] = "tuner (analog)",
	407	[ 0xc2 >> 1 ] = "tuner (analog)",
	408	};
	409
	410	static void do_i2c_scan(char name, struct i2c_client c)
	411	{
	412	unsigned char buf;
	413	int i,rc;
	414
	415	for (i = 0; i < 128; i++) {
	416	c->addr = i;
	417	rc = i2c_master_recv(c,&buf,0);
	418	if (rc < 0)
	419	continue;
	420	printk("%s: i2c scan: found device @ 0x%x [%s]\n",
	421	name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
	422	}
	423	}
	424
	425	/* init + register i2c algo-bit adapter */
	426	int __devinit init_bttv_i2c(struct bttv *btv)
	427	{
	428	memcpy(&btv->i2c_client, &bttv_i2c_client_template,
	429	sizeof(bttv_i2c_client_template));
	430
	431	if (i2c_hw)
	432	btv->use_i2c_hw = 1;
	433	if (btv->use_i2c_hw) {
	434	/* bt878 */
	435	memcpy(&btv->c.i2c_adap, &bttv_i2c_adap_hw_template,
	436	sizeof(bttv_i2c_adap_hw_template));
	437	} else {
	438	/* bt848 */
141276b5 MCC	439	/* Prevents usage of invalid delay values */
	440	if (i2c_udelay<5)
	441	i2c_udelay=5;
	442	bttv_i2c_algo_bit_template.udelay=i2c_udelay;
	443
1da177e4 LT	444	memcpy(&btv->c.i2c_adap, &bttv_i2c_adap_sw_template,
	445	sizeof(bttv_i2c_adap_sw_template));
	446	memcpy(&btv->i2c_algo, &bttv_i2c_algo_bit_template,
	447	sizeof(bttv_i2c_algo_bit_template));
	448	btv->i2c_algo.data = btv;
	449	btv->c.i2c_adap.algo_data = &btv->i2c_algo;
	450	}
	451
	452	btv->c.i2c_adap.dev.parent = &btv->c.pci->dev;
	453	snprintf(btv->c.i2c_adap.name, sizeof(btv->c.i2c_adap.name),
	454	"bt%d #%d [%s]", btv->id, btv->c.nr,
	455	btv->use_i2c_hw ? "hw" : "sw");
	456
4ac97914 MCC	457	i2c_set_adapdata(&btv->c.i2c_adap, btv);
4ac97914 MCC	458	btv->i2c_client.adapter = &btv->c.i2c_adap;
1da177e4	459
1da177e4 LT	460	if (bttv_tvcards[btv->c.type].no_video)
	461	btv->c.i2c_adap.class &= ~I2C_CLASS_TV_ANALOG;
	462	if (bttv_tvcards[btv->c.type].has_dvb)
	463	btv->c.i2c_adap.class \|= I2C_CLASS_TV_DIGITAL;
1da177e4 LT	464
	465	if (btv->use_i2c_hw) {
	466	btv->i2c_rc = i2c_add_adapter(&btv->c.i2c_adap);
	467	} else {
	468	bttv_bit_setscl(btv,1);
	469	bttv_bit_setsda(btv,1);
	470	btv->i2c_rc = i2c_bit_add_bus(&btv->c.i2c_adap);
	471	}
	472	if (0 == btv->i2c_rc && i2c_scan)
	473	do_i2c_scan(btv->c.name,&btv->i2c_client);
	474	return btv->i2c_rc;
	475	}
	476
	477	int __devexit fini_bttv_i2c(struct bttv *btv)
	478	{
	479	if (0 != btv->i2c_rc)
	480	return 0;
	481
3269711b	482	return i2c_del_adapter(&btv->c.i2c_adap);
1da177e4 LT	483	}
	484
	485	/*
	486	* Local variables:
	487	* c-basic-offset: 8
	488	* End:
	489	*/