[net-next-2.6.git] / drivers / media / video / cx23885 / cx23885-i2c.c

/*
 *  Driver for the Conexant CX23885 PCIe bridge
 *
 *  Copyright (c) 2006 Steven Toth <stoth@linuxtv.org>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <asm/io.h>

#include "cx23885.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");

#define dprintk(level, fmt, arg...)\
	do { if (i2c_debug >= level)\
		printk(KERN_DEBUG "%s/0: " fmt, dev->name, ## arg);\
	} while (0)

#define I2C_WAIT_DELAY 32
#define I2C_WAIT_RETRY 64

#define I2C_EXTEND  (1 << 3)
#define I2C_NOSTOP  (1 << 4)

static inline int i2c_slave_did_ack(struct i2c_adapter *i2c_adap)
{
	struct cx23885_i2c *bus = i2c_adap->algo_data;
	struct cx23885_dev *dev = bus->dev;
	return cx_read(bus->reg_stat) & 0x01;
}

static inline int i2c_is_busy(struct i2c_adapter *i2c_adap)
{
	struct cx23885_i2c *bus = i2c_adap->algo_data;
	struct cx23885_dev *dev = bus->dev;
	return cx_read(bus->reg_stat) & 0x02 ? 1 : 0;
}

static int i2c_wait_done(struct i2c_adapter *i2c_adap)
{
	int count;

	for (count = 0; count < I2C_WAIT_RETRY; count++) {
		if (!i2c_is_busy(i2c_adap))
			break;
		udelay(I2C_WAIT_DELAY);
	}

	if (I2C_WAIT_RETRY == count)
		return 0;

	return 1;
}

static int i2c_sendbytes(struct i2c_adapter *i2c_adap,
			 const struct i2c_msg *msg, int joined_rlen)
{
	struct cx23885_i2c *bus = i2c_adap->algo_data;
	struct cx23885_dev *dev = bus->dev;
	u32 wdata, addr, ctrl;
	int retval, cnt;

	if (joined_rlen)
		dprintk(1, "%s(msg->wlen=%d, nextmsg->rlen=%d)\n", __func__,
			msg->len, joined_rlen);
	else
		dprintk(1, "%s(msg->len=%d)\n", __func__, msg->len);

	/* Deal with i2c probe functions with zero payload */
	if (msg->len == 0) {
		cx_write(bus->reg_addr, msg->addr << 25);
		cx_write(bus->reg_ctrl, bus->i2c_period | (1 << 2));
		if (!i2c_wait_done(i2c_adap))
			return -EIO;
		if (!i2c_slave_did_ack(i2c_adap))
			return -EIO;

		dprintk(1, "%s() returns 0\n", __func__);
		return 0;
	}


	/* dev, reg + first byte */
	addr = (msg->addr << 25) | msg->buf[0];
	wdata = msg->buf[0];
	ctrl = bus->i2c_period | (1 << 12) | (1 << 2);

	if (msg->len > 1)
		ctrl |= I2C_NOSTOP | I2C_EXTEND;
	else if (joined_rlen)
		ctrl |= I2C_NOSTOP;

	cx_write(bus->reg_addr, addr);
	cx_write(bus->reg_wdata, wdata);
	cx_write(bus->reg_ctrl, ctrl);

	retval = i2c_wait_done(i2c_adap);
	if (retval < 0)
		goto err;
	if (retval == 0)
		goto eio;
	if (i2c_debug) {
		printk(" <W %02x %02x", msg->addr << 1, msg->buf[0]);
		if (!(ctrl & I2C_NOSTOP))
			printk(" >\n");
	}

	for (cnt = 1; cnt < msg->len; cnt++) {
		/* following bytes */
		wdata = msg->buf[cnt];
		ctrl = bus->i2c_period | (1 << 12) | (1 << 2);

		if (cnt < msg->len - 1)
			ctrl |= I2C_NOSTOP | I2C_EXTEND;
		else if (joined_rlen)
			ctrl |= I2C_NOSTOP;

		cx_write(bus->reg_addr, addr);
		cx_write(bus->reg_wdata, wdata);
		cx_write(bus->reg_ctrl, ctrl);

		retval = i2c_wait_done(i2c_adap);
		if (retval < 0)
			goto err;
		if (retval == 0)
			goto eio;
		if (i2c_debug) {
			dprintk(1, " %02x", msg->buf[cnt]);
			if (!(ctrl & I2C_NOSTOP))
				dprintk(1, " >\n");
		}
	}
	return msg->len;

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

static int i2c_readbytes(struct i2c_adapter *i2c_adap,
			 const struct i2c_msg *msg, int joined)
{
	struct cx23885_i2c *bus = i2c_adap->algo_data;
	struct cx23885_dev *dev = bus->dev;
	u32 ctrl, cnt;
	int retval;


	if (i2c_debug && !joined)
		dprintk(1, "%s(msg->len=%d)\n", __func__, msg->len);

	/* Deal with i2c probe functions with zero payload */
	if (msg->len == 0) {
		cx_write(bus->reg_addr, msg->addr << 25);
		cx_write(bus->reg_ctrl, bus->i2c_period | (1 << 2) | 1);
		if (!i2c_wait_done(i2c_adap))
			return -EIO;
		if (!i2c_slave_did_ack(i2c_adap))
			return -EIO;


		dprintk(1, "%s() returns 0\n", __func__);
		return 0;
	}

	if (i2c_debug) {
		if (joined)
			dprintk(1, " R");
		else
			dprintk(1, " <R %02x", (msg->addr << 1) + 1);
	}

	for (cnt = 0; cnt < msg->len; cnt++) {

		ctrl = bus->i2c_period | (1 << 12) | (1 << 2) | 1;

		if (cnt < msg->len - 1)
			ctrl |= I2C_NOSTOP | I2C_EXTEND;

		cx_write(bus->reg_addr, msg->addr << 25);
		cx_write(bus->reg_ctrl, ctrl);

		retval = i2c_wait_done(i2c_adap);
		if (retval < 0)
			goto err;
		if (retval == 0)
			goto eio;
		msg->buf[cnt] = cx_read(bus->reg_rdata) & 0xff;
		if (i2c_debug) {
			dprintk(1, " %02x", msg->buf[cnt]);
			if (!(ctrl & I2C_NOSTOP))
				dprintk(1, " >\n");
		}
	}
	return msg->len;

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

static int i2c_xfer(struct i2c_adapter *i2c_adap,
		    struct i2c_msg *msgs, int num)
{
	struct cx23885_i2c *bus = i2c_adap->algo_data;
	struct cx23885_dev *dev = bus->dev;
	int i, retval = 0;

	dprintk(1, "%s(num = %d)\n", __func__, num);

	for (i = 0 ; i < num; i++) {
		dprintk(1, "%s(num = %d) addr = 0x%02x  len = 0x%x\n",
			__func__, num, msgs[i].addr, msgs[i].len);
		if (msgs[i].flags & I2C_M_RD) {
			/* read */
			retval = i2c_readbytes(i2c_adap, &msgs[i], 0);
		} else if (i + 1 < num && (msgs[i + 1].flags & I2C_M_RD) &&
			   msgs[i].addr == msgs[i + 1].addr) {
			/* write then read from same address */
			retval = i2c_sendbytes(i2c_adap, &msgs[i],
					       msgs[i + 1].len);
			if (retval < 0)
				goto err;
			i++;
			retval = i2c_readbytes(i2c_adap, &msgs[i], 1);
		} else {
			/* write */
			retval = i2c_sendbytes(i2c_adap, &msgs[i], 0);
		}
		if (retval < 0)
			goto err;
	}
	return num;

 err:
	return retval;
}

static u32 cx23885_functionality(struct i2c_adapter *adap)
{
	return I2C_FUNC_SMBUS_EMUL | I2C_FUNC_I2C;
}

static struct i2c_algorithm cx23885_i2c_algo_template = {
	.master_xfer	= i2c_xfer,
	.functionality	= cx23885_functionality,
};

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

static struct i2c_adapter cx23885_i2c_adap_template = {
	.name              = "cx23885",
	.owner             = THIS_MODULE,
	.algo              = &cx23885_i2c_algo_template,
};

static struct i2c_client cx23885_i2c_client_template = {
	.name	= "cx23885 internal",
};

static char *i2c_devs[128] = {
	[0x10 >> 1] = "tda10048",
	[0x12 >> 1] = "dib7000pc",
	[0x1c >> 1] = "lgdt3303",
	[0x86 >> 1] = "tda9887",
	[0x32 >> 1] = "cx24227",
	[0x88 >> 1] = "cx25837",
	[0x84 >> 1] = "tda8295",
	[0xa0 >> 1] = "eeprom",
	[0xc0 >> 1] = "tuner/mt2131/tda8275",
	[0xc2 >> 1] = "tuner/mt2131/tda8275/xc5000/xc3028",
	[0xc8 >> 1] = "tuner/xc3028L",
};

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(KERN_INFO "%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 cx23885_i2c_register(struct cx23885_i2c *bus)
{
	struct cx23885_dev *dev = bus->dev;

	dprintk(1, "%s(bus = %d)\n", __func__, bus->nr);

	memcpy(&bus->i2c_adap, &cx23885_i2c_adap_template,
	       sizeof(bus->i2c_adap));
	memcpy(&bus->i2c_algo, &cx23885_i2c_algo_template,
	       sizeof(bus->i2c_algo));
	memcpy(&bus->i2c_client, &cx23885_i2c_client_template,
	       sizeof(bus->i2c_client));

	bus->i2c_adap.dev.parent = &dev->pci->dev;

	strlcpy(bus->i2c_adap.name, bus->dev->name,
		sizeof(bus->i2c_adap.name));

	bus->i2c_algo.data = bus;
	bus->i2c_adap.algo_data = bus;
	i2c_set_adapdata(&bus->i2c_adap, &dev->v4l2_dev);
	i2c_add_adapter(&bus->i2c_adap);

	bus->i2c_client.adapter = &bus->i2c_adap;

	if (0 == bus->i2c_rc) {
		dprintk(1, "%s: i2c bus %d registered\n", dev->name, bus->nr);
		if (i2c_scan) {
			printk(KERN_INFO "%s: scan bus %d:\n",
					dev->name, bus->nr);
			do_i2c_scan(dev->name, &bus->i2c_client);
		}
	} else
		printk(KERN_WARNING "%s: i2c bus %d register FAILED\n",
			dev->name, bus->nr);

	/* Instantiate the IR receiver device, if present */
	if (0 == bus->i2c_rc) {
		struct i2c_board_info info;
		const unsigned short addr_list[] = {
			0x6b, I2C_CLIENT_END
		};

		memset(&info, 0, sizeof(struct i2c_board_info));
		strlcpy(info.type, "ir_video", I2C_NAME_SIZE);
		/*
		 * We can't call i2c_new_probed_device() because it uses
		 * quick writes for probing and the IR receiver device only
		 * replies to reads.
		 */
		if (i2c_smbus_xfer(&bus->i2c_adap, addr_list[0], 0,
				   I2C_SMBUS_READ, 0, I2C_SMBUS_QUICK,
				   NULL) >= 0) {
			info.addr = addr_list[0];
			i2c_new_device(&bus->i2c_adap, &info);
		}
	}

	return bus->i2c_rc;
}

int cx23885_i2c_unregister(struct cx23885_i2c *bus)
{
	i2c_del_adapter(&bus->i2c_adap);
	return 0;
}

void cx23885_av_clk(struct cx23885_dev *dev, int enable)
{
	/* write 0 to bus 2 addr 0x144 via i2x_xfer() */
	char buffer[3];
	struct i2c_msg msg;
	dprintk(1, "%s(enabled = %d)\n", __func__, enable);

	/* Register 0x144 */
	buffer[0] = 0x01;
	buffer[1] = 0x44;
	if (enable == 1)
		buffer[2] = 0x05;
	else
		buffer[2] = 0x00;

	msg.addr = 0x44;
	msg.flags = I2C_M_TEN;
	msg.len = 3;
	msg.buf = buffer;

	i2c_xfer(&dev->i2c_bus[2].i2c_adap, &msg, 1);
}

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

/*
 * Local variables:
 * c-basic-offset: 8
 * End:
 */
Commit	Line	Data
d19770e5 ST	1	/*
	2	* Driver for the Conexant CX23885 PCIe bridge
	3	*
6d897616	4	* Copyright (c) 2006 Steven Toth <stoth@linuxtv.org>
d19770e5 ST	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	*
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	20	*/
	21
	22	#include <linux/module.h>
	23	#include <linux/moduleparam.h>
	24	#include <linux/init.h>
	25	#include <linux/delay.h>
	26	#include <asm/io.h>
	27
	28	#include "cx23885.h"
	29
	30	#include <media/v4l2-common.h>
	31
4513fc69	32	static unsigned int i2c_debug;
d19770e5	33	module_param(i2c_debug, int, 0644);
44a6481d	34	MODULE_PARM_DESC(i2c_debug, "enable debug messages [i2c]");
d19770e5	35
ff699e6b	36	static unsigned int i2c_scan;
d19770e5	37	module_param(i2c_scan, int, 0444);
44a6481d	38	MODULE_PARM_DESC(i2c_scan, "scan i2c bus at insmod time");
d19770e5	39
4513fc69 ST	40	#define dprintk(level, fmt, arg...)\
	41	do { if (i2c_debug >= level)\
	42	printk(KERN_DEBUG "%s/0: " fmt, dev->name, ## arg);\
5e3c5967	43	} while (0)
d19770e5 ST	44
	45	#define I2C_WAIT_DELAY 32
	46	#define I2C_WAIT_RETRY 64
	47
	48	#define I2C_EXTEND (1 << 3)
	49	#define I2C_NOSTOP (1 << 4)
	50
	51	static inline int i2c_slave_did_ack(struct i2c_adapter *i2c_adap)
	52	{
	53	struct cx23885_i2c *bus = i2c_adap->algo_data;
	54	struct cx23885_dev *dev = bus->dev;
	55	return cx_read(bus->reg_stat) & 0x01;
	56	}
	57
	58	static inline int i2c_is_busy(struct i2c_adapter *i2c_adap)
	59	{
	60	struct cx23885_i2c *bus = i2c_adap->algo_data;
	61	struct cx23885_dev *dev = bus->dev;
	62	return cx_read(bus->reg_stat) & 0x02 ? 1 : 0;
	63	}
	64
	65	static int i2c_wait_done(struct i2c_adapter *i2c_adap)
	66	{
	67	int count;
	68
	69	for (count = 0; count < I2C_WAIT_RETRY; count++) {
	70	if (!i2c_is_busy(i2c_adap))
	71	break;
	72	udelay(I2C_WAIT_DELAY);
	73	}
	74
	75	if (I2C_WAIT_RETRY == count)
	76	return 0;
	77
	78	return 1;
	79	}
	80
44a6481d	81	static int i2c_sendbytes(struct i2c_adapter *i2c_adap,
5e3c5967	82	const struct i2c_msg *msg, int joined_rlen)
d19770e5 ST	83	{
	84	struct cx23885_i2c *bus = i2c_adap->algo_data;
	85	struct cx23885_dev *dev = bus->dev;
	86	u32 wdata, addr, ctrl;
	87	int retval, cnt;
	88
5e3c5967	89	if (joined_rlen)
22b4e64f	90	dprintk(1, "%s(msg->wlen=%d, nextmsg->rlen=%d)\n", __func__,
5e3c5967 CP	91	msg->len, joined_rlen);
5e3c5967 CP	92	else
22b4e64f	93	dprintk(1, "%s(msg->len=%d)\n", __func__, msg->len);
e92adc2c	94
d19770e5 ST	95	/* Deal with i2c probe functions with zero payload */
	96	if (msg->len == 0) {
	97	cx_write(bus->reg_addr, msg->addr << 25);
	98	cx_write(bus->reg_ctrl, bus->i2c_period \| (1 << 2));
	99	if (!i2c_wait_done(i2c_adap))
	100	return -EIO;
	101	if (!i2c_slave_did_ack(i2c_adap))
	102	return -EIO;
	103
22b4e64f	104	dprintk(1, "%s() returns 0\n", __func__);
d19770e5 ST	105	return 0;
	106	}
	107
	108
	109	/* dev, reg + first byte */
	110	addr = (msg->addr << 25) \| msg->buf[0];
	111	wdata = msg->buf[0];
	112	ctrl = bus->i2c_period \| (1 << 12) \| (1 << 2);
	113
	114	if (msg->len > 1)
	115	ctrl \|= I2C_NOSTOP \| I2C_EXTEND;
5e3c5967 CP	116	else if (joined_rlen)
5e3c5967 CP	117	ctrl \|= I2C_NOSTOP;
d19770e5 ST	118
	119	cx_write(bus->reg_addr, addr);
	120	cx_write(bus->reg_wdata, wdata);
	121	cx_write(bus->reg_ctrl, ctrl);
	122
	123	retval = i2c_wait_done(i2c_adap);
	124	if (retval < 0)
	125	goto err;
	126	if (retval == 0)
	127	goto eio;
	128	if (i2c_debug) {
	129	printk(" <W %02x %02x", msg->addr << 1, msg->buf[0]);
	130	if (!(ctrl & I2C_NOSTOP))
	131	printk(" >\n");
	132	}
	133
9c8ced51	134	for (cnt = 1; cnt < msg->len; cnt++) {
d19770e5 ST	135	/* following bytes */
	136	wdata = msg->buf[cnt];
	137	ctrl = bus->i2c_period \| (1 << 12) \| (1 << 2);
	138
e92adc2c	139	if (cnt < msg->len - 1)
d19770e5	140	ctrl \|= I2C_NOSTOP \| I2C_EXTEND;
5e3c5967 CP	141	else if (joined_rlen)
5e3c5967 CP	142	ctrl \|= I2C_NOSTOP;
d19770e5	143
d19770e5 ST	144	cx_write(bus->reg_addr, addr);
	145	cx_write(bus->reg_wdata, wdata);
	146	cx_write(bus->reg_ctrl, ctrl);
	147
	148	retval = i2c_wait_done(i2c_adap);
	149	if (retval < 0)
	150	goto err;
	151	if (retval == 0)
	152	goto eio;
	153	if (i2c_debug) {
9c8ced51	154	dprintk(1, " %02x", msg->buf[cnt]);
d19770e5	155	if (!(ctrl & I2C_NOSTOP))
9c8ced51	156	dprintk(1, " >\n");
d19770e5 ST	157	}
	158	}
	159	return msg->len;
	160
	161	eio:
	162	retval = -EIO;
	163	err:
5e3c5967	164	if (i2c_debug)
9c8ced51	165	printk(KERN_ERR " ERR: %d\n", retval);
d19770e5 ST	166	return retval;
	167	}
	168
44a6481d	169	static int i2c_readbytes(struct i2c_adapter *i2c_adap,
5e3c5967	170	const struct i2c_msg *msg, int joined)
d19770e5 ST	171	{
	172	struct cx23885_i2c *bus = i2c_adap->algo_data;
	173	struct cx23885_dev *dev = bus->dev;
	174	u32 ctrl, cnt;
	175	int retval;
	176
5e3c5967 CP	177
5e3c5967 CP	178	if (i2c_debug && !joined)
22b4e64f	179	dprintk(1, "%s(msg->len=%d)\n", __func__, msg->len);
d19770e5 ST	180
	181	/* Deal with i2c probe functions with zero payload */
	182	if (msg->len == 0) {
	183	cx_write(bus->reg_addr, msg->addr << 25);
	184	cx_write(bus->reg_ctrl, bus->i2c_period \| (1 << 2) \| 1);
	185	if (!i2c_wait_done(i2c_adap))
	186	return -EIO;
	187	if (!i2c_slave_did_ack(i2c_adap))
	188	return -EIO;
	189
	190
22b4e64f	191	dprintk(1, "%s() returns 0\n", __func__);
d19770e5 ST	192	return 0;
	193	}
	194
5e3c5967 CP	195	if (i2c_debug) {
5e3c5967 CP	196	if (joined)
9c8ced51	197	dprintk(1, " R");
5e3c5967	198	else
9c8ced51	199	dprintk(1, " <R %02x", (msg->addr << 1) + 1);
5e3c5967	200	}
e92adc2c	201
9c8ced51	202	for (cnt = 0; cnt < msg->len; cnt++) {
d19770e5 ST	203
	204	ctrl = bus->i2c_period \| (1 << 12) \| (1 << 2) \| 1;
	205
e92adc2c	206	if (cnt < msg->len - 1)
d19770e5 ST	207	ctrl \|= I2C_NOSTOP \| I2C_EXTEND;
	208
	209	cx_write(bus->reg_addr, msg->addr << 25);
	210	cx_write(bus->reg_ctrl, ctrl);
	211
	212	retval = i2c_wait_done(i2c_adap);
	213	if (retval < 0)
	214	goto err;
	215	if (retval == 0)
	216	goto eio;
	217	msg->buf[cnt] = cx_read(bus->reg_rdata) & 0xff;
	218	if (i2c_debug) {
9c8ced51	219	dprintk(1, " %02x", msg->buf[cnt]);
d19770e5	220	if (!(ctrl & I2C_NOSTOP))
9c8ced51	221	dprintk(1, " >\n");
d19770e5 ST	222	}
	223	}
	224	return msg->len;
	225
	226	eio:
	227	retval = -EIO;
	228	err:
5e3c5967	229	if (i2c_debug)
9c8ced51	230	printk(KERN_ERR " ERR: %d\n", retval);
d19770e5 ST	231	return retval;
	232	}
	233
44a6481d MK	234	static int i2c_xfer(struct i2c_adapter *i2c_adap,
44a6481d MK	235	struct i2c_msg *msgs, int num)
d19770e5 ST	236	{
	237	struct cx23885_i2c *bus = i2c_adap->algo_data;
	238	struct cx23885_dev *dev = bus->dev;
	239	int i, retval = 0;
	240
22b4e64f	241	dprintk(1, "%s(num = %d)\n", __func__, num);
d19770e5 ST	242
d19770e5 ST	243	for (i = 0 ; i < num; i++) {
44a6481d	244	dprintk(1, "%s(num = %d) addr = 0x%02x len = 0x%x\n",
22b4e64f	245	__func__, num, msgs[i].addr, msgs[i].len);
d19770e5 ST	246	if (msgs[i].flags & I2C_M_RD) {
d19770e5 ST	247	/* read */
5e3c5967 CP	248	retval = i2c_readbytes(i2c_adap, &msgs[i], 0);
	249	} else if (i + 1 < num && (msgs[i + 1].flags & I2C_M_RD) &&
	250	msgs[i].addr == msgs[i + 1].addr) {
	251	/* write then read from same address */
	252	retval = i2c_sendbytes(i2c_adap, &msgs[i],
	253	msgs[i + 1].len);
d19770e5 ST	254	if (retval < 0)
d19770e5 ST	255	goto err;
5e3c5967 CP	256	i++;
5e3c5967 CP	257	retval = i2c_readbytes(i2c_adap, &msgs[i], 1);
d19770e5 ST	258	} else {
d19770e5 ST	259	/* write */
5e3c5967	260	retval = i2c_sendbytes(i2c_adap, &msgs[i], 0);
d19770e5	261	}
5e3c5967 CP	262	if (retval < 0)
5e3c5967 CP	263	goto err;
d19770e5 ST	264	}
	265	return num;
	266
	267	err:
	268	return retval;
	269	}
	270
d19770e5 ST	271	static u32 cx23885_functionality(struct i2c_adapter *adap)
d19770e5 ST	272	{
0fc0739b	273	return I2C_FUNC_SMBUS_EMUL \| I2C_FUNC_I2C;
d19770e5 ST	274	}
	275
	276	static struct i2c_algorithm cx23885_i2c_algo_template = {
	277	.master_xfer = i2c_xfer,
d19770e5 ST	278	.functionality = cx23885_functionality,
	279	};
	280
	281	/* ----------------------------------------------------------------------- */
	282
	283	static struct i2c_adapter cx23885_i2c_adap_template = {
	284	.name = "cx23885",
	285	.owner = THIS_MODULE,
d19770e5	286	.algo = &cx23885_i2c_algo_template,
d19770e5 ST	287	};
	288
	289	static struct i2c_client cx23885_i2c_client_template = {
	290	.name = "cx23885 internal",
	291	};
	292
	293	static char *i2c_devs[128] = {
9c8ced51 ST	294	[0x10 >> 1] = "tda10048",
	295	[0x12 >> 1] = "dib7000pc",
	296	[0x1c >> 1] = "lgdt3303",
	297	[0x86 >> 1] = "tda9887",
	298	[0x32 >> 1] = "cx24227",
	299	[0x88 >> 1] = "cx25837",
	300	[0x84 >> 1] = "tda8295",
	301	[0xa0 >> 1] = "eeprom",
	302	[0xc0 >> 1] = "tuner/mt2131/tda8275",
66762373	303	[0xc2 >> 1] = "tuner/mt2131/tda8275/xc5000/xc3028",
9c8ced51	304	[0xc8 >> 1] = "tuner/xc3028L",
d19770e5 ST	305	};
	306
	307	static void do_i2c_scan(char name, struct i2c_client c)
	308	{
	309	unsigned char buf;
44a6481d	310	int i, rc;
d19770e5 ST	311
	312	for (i = 0; i < 128; i++) {
	313	c->addr = i;
44a6481d	314	rc = i2c_master_recv(c, &buf, 0);
d19770e5 ST	315	if (rc < 0)
d19770e5 ST	316	continue;
9c8ced51	317	printk(KERN_INFO "%s: i2c scan: found device @ 0x%x [%s]\n",
d19770e5 ST	318	name, i << 1, i2c_devs[i] ? i2c_devs[i] : "???");
	319	}
	320	}
	321
	322	/* init + register i2c algo-bit adapter */
	323	int cx23885_i2c_register(struct cx23885_i2c *bus)
	324	{
	325	struct cx23885_dev *dev = bus->dev;
	326
22b4e64f	327	dprintk(1, "%s(bus = %d)\n", __func__, bus->nr);
d19770e5	328
44a6481d MK	329	memcpy(&bus->i2c_adap, &cx23885_i2c_adap_template,
	330	sizeof(bus->i2c_adap));
	331	memcpy(&bus->i2c_algo, &cx23885_i2c_algo_template,
	332	sizeof(bus->i2c_algo));
	333	memcpy(&bus->i2c_client, &cx23885_i2c_client_template,
	334	sizeof(bus->i2c_client));
d19770e5 ST	335
	336	bus->i2c_adap.dev.parent = &dev->pci->dev;
	337
44a6481d MK	338	strlcpy(bus->i2c_adap.name, bus->dev->name,
44a6481d MK	339	sizeof(bus->i2c_adap.name));
2e52f215	340
d19770e5 ST	341	bus->i2c_algo.data = bus;
d19770e5 ST	342	bus->i2c_adap.algo_data = bus;
c0714f6c	343	i2c_set_adapdata(&bus->i2c_adap, &dev->v4l2_dev);
d19770e5 ST	344	i2c_add_adapter(&bus->i2c_adap);
	345
	346	bus->i2c_client.adapter = &bus->i2c_adap;
	347
	348	if (0 == bus->i2c_rc) {
9c8ced51	349	dprintk(1, "%s: i2c bus %d registered\n", dev->name, bus->nr);
0d5a19f1 HV	350	if (i2c_scan) {
	351	printk(KERN_INFO "%s: scan bus %d:\n",
	352	dev->name, bus->nr);
d19770e5	353	do_i2c_scan(dev->name, &bus->i2c_client);
0d5a19f1	354	}
d19770e5	355	} else
9c8ced51 ST	356	printk(KERN_WARNING "%s: i2c bus %d register FAILED\n",
9c8ced51 ST	357	dev->name, bus->nr);
d19770e5	358
c668f32d JD	359	/* Instantiate the IR receiver device, if present */
	360	if (0 == bus->i2c_rc) {
	361	struct i2c_board_info info;
	362	const unsigned short addr_list[] = {
	363	0x6b, I2C_CLIENT_END
	364	};
	365
	366	memset(&info, 0, sizeof(struct i2c_board_info));
	367	strlcpy(info.type, "ir_video", I2C_NAME_SIZE);
806b07c2 JD	368	/*
	369	* We can't call i2c_new_probed_device() because it uses
	370	* quick writes for probing and the IR receiver device only
	371	* replies to reads.
	372	*/
	373	if (i2c_smbus_xfer(&bus->i2c_adap, addr_list[0], 0,
	374	I2C_SMBUS_READ, 0, I2C_SMBUS_QUICK,
	375	NULL) >= 0) {
	376	info.addr = addr_list[0];
	377	i2c_new_device(&bus->i2c_adap, &info);
	378	}
c668f32d JD	379	}
c668f32d JD	380
d19770e5 ST	381	return bus->i2c_rc;
	382	}
	383
	384	int cx23885_i2c_unregister(struct cx23885_i2c *bus)
	385	{
	386	i2c_del_adapter(&bus->i2c_adap);
	387	return 0;
	388	}
	389
a589b665 ST	390	void cx23885_av_clk(struct cx23885_dev *dev, int enable)
	391	{
	392	/* write 0 to bus 2 addr 0x144 via i2x_xfer() */
	393	char buffer[3];
	394	struct i2c_msg msg;
	395	dprintk(1, "%s(enabled = %d)\n", __func__, enable);
	396
	397	/* Register 0x144 */
	398	buffer[0] = 0x01;
	399	buffer[1] = 0x44;
	400	if (enable == 1)
	401	buffer[2] = 0x05;
	402	else
	403	buffer[2] = 0x00;
	404
	405	msg.addr = 0x44;
	406	msg.flags = I2C_M_TEN;
	407	msg.len = 3;
	408	msg.buf = buffer;
	409
	410	i2c_xfer(&dev->i2c_bus[2].i2c_adap, &msg, 1);
	411	}
	412
d19770e5 ST	413	/* ----------------------------------------------------------------------- */
d19770e5 ST	414
d19770e5 ST	415	/*
	416	* Local variables:
	417	* c-basic-offset: 8
	418	* End:
	419	*/