[mirror_ubuntu-artful-kernel.git] / drivers / media / video / bt832.c

/* Driver for Bt832 CMOS Camera Video Processor
    i2c-addresses: 0x88 or 0x8a

  The BT832 interfaces to a Quartzsight Digital Camera (352x288, 25 or 30 fps)
  via a 9 pin connector ( 4-wire SDATA, 2-wire i2c, SCLK, VCC, GND).
  It outputs an 8-bit 4:2:2 YUV or YCrCb video signal which can be directly
  connected to bt848/bt878 GPIO pins on this purpose.
  (see: VLSI Vision Ltd. www.vvl.co.uk for camera datasheets)

  Supported Cards:
  -  Pixelview Rev.4E: 0x8a
		GPIO 0x400000 toggles Bt832 RESET, and the chip changes to i2c 0x88 !

  (c) Gunther Mayer, 2002

  STATUS:
  - detect chip and hexdump
  - reset chip and leave low power mode
  - detect camera present

  TODO:
  - make it work (find correct setup for Bt832 and Bt878)
*/

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/i2c.h>
#include <linux/types.h>
#include <linux/videodev.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/slab.h>

#include <media/audiochip.h>
#include "bttv.h"
#include "bt832.h"

MODULE_LICENSE("GPL");

/* Addresses to scan */
static unsigned short normal_i2c[] = { I2C_BT832_ALT1>>1, I2C_BT832_ALT2>>1,
				       I2C_CLIENT_END };
I2C_CLIENT_INSMOD;

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

#define dprintk     if (debug) printk

static int bt832_detach(struct i2c_client *client);


static struct i2c_driver driver;
static struct i2c_client client_template;

struct bt832 {
	struct i2c_client client;
};

int bt832_hexdump(struct i2c_client *i2c_client_s, unsigned char *buf)
{
	int i,rc;
	buf[0]=0x80; // start at register 0 with auto-increment
	if (1 != (rc = i2c_master_send(i2c_client_s,buf,1)))
		printk("bt832: i2c i/o error: rc == %d (should be 1)\n",rc);

	for(i=0;i<65;i++)
		buf[i]=0;
	if (65 != (rc=i2c_master_recv(i2c_client_s,buf,65)))
		printk("bt832: i2c i/o error: rc == %d (should be 65)\n",rc);

	// Note: On READ the first byte is the current index
	//  (e.g. 0x80, what we just wrote)

	if(1) {
		int i;
		printk("BT832 hexdump:\n");
		for(i=1;i<65;i++) {
			if(i!=1) {
			  if(((i-1)%8)==0) printk(" ");
			  if(((i-1)%16)==0) printk("\n");
			}
			printk(" %02x",buf[i]);
		}
		printk("\n");
	}
	return 0;
}

// Return: 1 (is a bt832), 0 (No bt832 here)
int bt832_init(struct i2c_client *i2c_client_s)
{
	unsigned char *buf;
	int rc;

	buf=kmalloc(65,GFP_KERNEL);
	bt832_hexdump(i2c_client_s,buf);

	if(buf[0x40] != 0x31) {
		printk("bt832: this i2c chip is no bt832 (id=%02x). Detaching.\n",buf[0x40]);
		kfree(buf);
		return 0;
	}

	printk("Write 0 tp VPSTATUS\n");
	buf[0]=BT832_VP_STATUS; // Reg.52
	buf[1]= 0x00;
	if (2 != (rc = i2c_master_send(i2c_client_s,buf,2)))
		printk("bt832: i2c i/o error VPS: rc == %d (should be 2)\n",rc);

	bt832_hexdump(i2c_client_s,buf);


	// Leave low power mode:
	printk("Bt832: leave low power mode.\n");
	buf[0]=BT832_CAM_SETUP0; //0x39 57
	buf[1]=0x08;
	if (2 != (rc = i2c_master_send(i2c_client_s,buf,2)))
		printk("bt832: i2c i/o error LLPM: rc == %d (should be 2)\n",rc);

	bt832_hexdump(i2c_client_s,buf);

	printk("Write 0 tp VPSTATUS\n");
	buf[0]=BT832_VP_STATUS; // Reg.52
	buf[1]= 0x00;
	if (2 != (rc = i2c_master_send(i2c_client_s,buf,2)))
		printk("bt832: i2c i/o error VPS: rc == %d (should be 2)\n",rc);

	bt832_hexdump(i2c_client_s,buf);


	// Enable Output
	printk("Enable Output\n");
	buf[0]=BT832_VP_CONTROL1; // Reg.40
	buf[1]= 0x27 & (~0x01); // Default | !skip
	if (2 != (rc = i2c_master_send(i2c_client_s,buf,2)))
		printk("bt832: i2c i/o error EO: rc == %d (should be 2)\n",rc);

	bt832_hexdump(i2c_client_s,buf);


	// for testing (even works when no camera attached)
	printk("bt832: *** Generate NTSC M Bars *****\n");
	buf[0]=BT832_VP_TESTCONTROL0; // Reg. 42
	buf[1]=3; // Generate NTSC System M bars, Generate Frame timing internally
	if (2 != (rc = i2c_master_send(i2c_client_s,buf,2)))
		printk("bt832: i2c i/o error MBAR: rc == %d (should be 2)\n",rc);

	printk("Bt832: Camera Present: %s\n",
		(buf[1+BT832_CAM_STATUS] & BT832_56_CAMERA_PRESENT) ? "yes":"no");

	bt832_hexdump(i2c_client_s,buf);
	kfree(buf);
	return 1;
}


static int bt832_attach(struct i2c_adapter *adap, int addr, int kind)
{
	struct bt832 *t;

	printk("bt832_attach\n");

	client_template.adapter = adap;
	client_template.addr    = addr;

	printk("bt832: chip found @ 0x%x\n", addr<<1);

	if (NULL == (t = kmalloc(sizeof(*t), GFP_KERNEL)))
		return -ENOMEM;
	memset(t,0,sizeof(*t));
	t->client = client_template;
	i2c_set_clientdata(&t->client, t);
	i2c_attach_client(&t->client);

	if(! bt832_init(&t->client)) {
		bt832_detach(&t->client);
		return -1;
	}

	return 0;
}

static int bt832_probe(struct i2c_adapter *adap)
{
#ifdef I2C_CLASS_TV_ANALOG
	if (adap->class & I2C_CLASS_TV_ANALOG)
		return i2c_probe(adap, &addr_data, bt832_attach);
#else
	if (adap->id == I2C_HW_B_BT848)
		return i2c_probe(adap, &addr_data, bt832_attach);
#endif
	return 0;
}

static int bt832_detach(struct i2c_client *client)
{
	struct bt832 *t = i2c_get_clientdata(client);

	printk("bt832: detach.\n");
	i2c_detach_client(client);
	kfree(t);
	return 0;
}

static int
bt832_command(struct i2c_client *client, unsigned int cmd, void *arg)
{
	struct bt832 *t = i2c_get_clientdata(client);

	printk("bt832: command %x\n",cmd);

	switch (cmd) {
		case BT832_HEXDUMP: {
			unsigned char *buf;
			buf=kmalloc(65,GFP_KERNEL);
			bt832_hexdump(&t->client,buf);
			kfree(buf);
		}
		break;
		case BT832_REATTACH:
			printk("bt832: re-attach\n");
			i2c_del_driver(&driver);
			i2c_add_driver(&driver);
		break;
	}
	return 0;
}

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

static struct i2c_driver driver = {
	.owner          = THIS_MODULE,
	.name           = "i2c bt832 driver",
	.id             = -1, /* FIXME */
	.flags          = I2C_DF_NOTIFY,
	.attach_adapter = bt832_probe,
	.detach_client  = bt832_detach,
	.command        = bt832_command,
};
static struct i2c_client client_template =
{
	.name       = "bt832",
	.flags      = I2C_CLIENT_ALLOW_USE,
	.driver     = &driver,
};


static int __init bt832_init_module(void)
{
	return i2c_add_driver(&driver);
}

static void __exit bt832_cleanup_module(void)
{
	i2c_del_driver(&driver);
}

module_init(bt832_init_module);
module_exit(bt832_cleanup_module);

/*
 * Overrides for Emacs so that we follow Linus's tabbing style.
 * ---------------------------------------------------------------------------
 * Local variables:
 * c-basic-offset: 8
 * End:
 */
Commit	Line	Data
1da177e4 LT	1	/* Driver for Bt832 CMOS Camera Video Processor
	2	i2c-addresses: 0x88 or 0x8a
	3
	4	The BT832 interfaces to a Quartzsight Digital Camera (352x288, 25 or 30 fps)
	5	via a 9 pin connector ( 4-wire SDATA, 2-wire i2c, SCLK, VCC, GND).
	6	It outputs an 8-bit 4:2:2 YUV or YCrCb video signal which can be directly
	7	connected to bt848/bt878 GPIO pins on this purpose.
	8	(see: VLSI Vision Ltd. www.vvl.co.uk for camera datasheets)
56fc08ca	9
1da177e4 LT	10	Supported Cards:
	11	- Pixelview Rev.4E: 0x8a
	12	GPIO 0x400000 toggles Bt832 RESET, and the chip changes to i2c 0x88 !
	13
	14	(c) Gunther Mayer, 2002
	15
	16	STATUS:
	17	- detect chip and hexdump
	18	- reset chip and leave low power mode
	19	- detect camera present
	20
	21	TODO:
	22	- make it work (find correct setup for Bt832 and Bt878)
	23	*/
	24
	25	#include <linux/module.h>
	26	#include <linux/kernel.h>
	27	#include <linux/i2c.h>
	28	#include <linux/types.h>
	29	#include <linux/videodev.h>
	30	#include <linux/init.h>
	31	#include <linux/errno.h>
	32	#include <linux/slab.h>
	33
56fc08ca	34	#include <media/audiochip.h>
1da177e4 LT	35	#include "bttv.h"
	36	#include "bt832.h"
	37
	38	MODULE_LICENSE("GPL");
	39
	40	/* Addresses to scan */
f5bec396 MCC	41	static unsigned short normal_i2c[] = { I2C_BT832_ALT1>>1, I2C_BT832_ALT2>>1,
f5bec396 MCC	42	I2C_CLIENT_END };
1da177e4 LT	43	I2C_CLIENT_INSMOD;
	44
	45	/* ---------------------------------------------------------------------- */
	46
	47	#define dprintk if (debug) printk
	48
	49	static int bt832_detach(struct i2c_client *client);
	50
	51
	52	static struct i2c_driver driver;
	53	static struct i2c_client client_template;
	54
	55	struct bt832 {
4ac97914	56	struct i2c_client client;
1da177e4 LT	57	};
	58
	59	int bt832_hexdump(struct i2c_client i2c_client_s, unsigned char buf)
	60	{
	61	int i,rc;
	62	buf[0]=0x80; // start at register 0 with auto-increment
4ac97914 MCC	63	if (1 != (rc = i2c_master_send(i2c_client_s,buf,1)))
4ac97914 MCC	64	printk("bt832: i2c i/o error: rc == %d (should be 1)\n",rc);
1da177e4	65
4ac97914 MCC	66	for(i=0;i<65;i++)
	67	buf[i]=0;
	68	if (65 != (rc=i2c_master_recv(i2c_client_s,buf,65)))
	69	printk("bt832: i2c i/o error: rc == %d (should be 65)\n",rc);
1da177e4	70
4ac97914 MCC	71	// Note: On READ the first byte is the current index
4ac97914 MCC	72	// (e.g. 0x80, what we just wrote)
1da177e4	73
4ac97914 MCC	74	if(1) {
	75	int i;
	76	printk("BT832 hexdump:\n");
	77	for(i=1;i<65;i++) {
1da177e4 LT	78	if(i!=1) {
1da177e4 LT	79	if(((i-1)%8)==0) printk(" ");
4ac97914	80	if(((i-1)%16)==0) printk("\n");
1da177e4	81	}
4ac97914 MCC	82	printk(" %02x",buf[i]);
	83	}
	84	printk("\n");
	85	}
1da177e4 LT	86	return 0;
	87	}
	88
	89	// Return: 1 (is a bt832), 0 (No bt832 here)
	90	int bt832_init(struct i2c_client *i2c_client_s)
	91	{
	92	unsigned char *buf;
	93	int rc;
	94
	95	buf=kmalloc(65,GFP_KERNEL);
	96	bt832_hexdump(i2c_client_s,buf);
56fc08ca	97
1da177e4 LT	98	if(buf[0x40] != 0x31) {
	99	printk("bt832: this i2c chip is no bt832 (id=%02x). Detaching.\n",buf[0x40]);
	100	kfree(buf);
	101	return 0;
	102	}
	103
4ac97914 MCC	104	printk("Write 0 tp VPSTATUS\n");
	105	buf[0]=BT832_VP_STATUS; // Reg.52
	106	buf[1]= 0x00;
	107	if (2 != (rc = i2c_master_send(i2c_client_s,buf,2)))
	108	printk("bt832: i2c i/o error VPS: rc == %d (should be 2)\n",rc);
1da177e4	109
4ac97914	110	bt832_hexdump(i2c_client_s,buf);
1da177e4 LT	111
	112
	113	// Leave low power mode:
	114	printk("Bt832: leave low power mode.\n");
	115	buf[0]=BT832_CAM_SETUP0; //0x39 57
	116	buf[1]=0x08;
	117	if (2 != (rc = i2c_master_send(i2c_client_s,buf,2)))
4ac97914	118	printk("bt832: i2c i/o error LLPM: rc == %d (should be 2)\n",rc);
1da177e4	119
4ac97914	120	bt832_hexdump(i2c_client_s,buf);
1da177e4 LT	121
1da177e4 LT	122	printk("Write 0 tp VPSTATUS\n");
4ac97914 MCC	123	buf[0]=BT832_VP_STATUS; // Reg.52
	124	buf[1]= 0x00;
	125	if (2 != (rc = i2c_master_send(i2c_client_s,buf,2)))
	126	printk("bt832: i2c i/o error VPS: rc == %d (should be 2)\n",rc);
1da177e4	127
4ac97914	128	bt832_hexdump(i2c_client_s,buf);
1da177e4 LT	129
	130
	131	// Enable Output
	132	printk("Enable Output\n");
	133	buf[0]=BT832_VP_CONTROL1; // Reg.40
	134	buf[1]= 0x27 & (~0x01); // Default \| !skip
	135	if (2 != (rc = i2c_master_send(i2c_client_s,buf,2)))
4ac97914	136	printk("bt832: i2c i/o error EO: rc == %d (should be 2)\n",rc);
56fc08ca	137
4ac97914	138	bt832_hexdump(i2c_client_s,buf);
1da177e4	139
1da177e4	140
1da177e4 LT	141	// for testing (even works when no camera attached)
	142	printk("bt832: * Generate NTSC M Bars ***\n");
	143	buf[0]=BT832_VP_TESTCONTROL0; // Reg. 42
	144	buf[1]=3; // Generate NTSC System M bars, Generate Frame timing internally
4ac97914 MCC	145	if (2 != (rc = i2c_master_send(i2c_client_s,buf,2)))
4ac97914 MCC	146	printk("bt832: i2c i/o error MBAR: rc == %d (should be 2)\n",rc);
1da177e4 LT	147
	148	printk("Bt832: Camera Present: %s\n",
	149	(buf[1+BT832_CAM_STATUS] & BT832_56_CAMERA_PRESENT) ? "yes":"no");
	150
4ac97914	151	bt832_hexdump(i2c_client_s,buf);
1da177e4 LT	152	kfree(buf);
	153	return 1;
	154	}
	155
	156
	157
56fc08ca	158	static int bt832_attach(struct i2c_adapter *adap, int addr, int kind)
1da177e4 LT	159	{
	160	struct bt832 *t;
	161
	162	printk("bt832_attach\n");
	163
4ac97914 MCC	164	client_template.adapter = adap;
4ac97914 MCC	165	client_template.addr = addr;
1da177e4	166
4ac97914	167	printk("bt832: chip found @ 0x%x\n", addr<<1);
1da177e4	168
4ac97914 MCC	169	if (NULL == (t = kmalloc(sizeof(*t), GFP_KERNEL)))
4ac97914 MCC	170	return -ENOMEM;
1da177e4 LT	171	memset(t,0,sizeof(*t));
1da177e4 LT	172	t->client = client_template;
4ac97914 MCC	173	i2c_set_clientdata(&t->client, t);
4ac97914 MCC	174	i2c_attach_client(&t->client);
1da177e4 LT	175
	176	if(! bt832_init(&t->client)) {
	177	bt832_detach(&t->client);
	178	return -1;
	179	}
56fc08ca	180
1da177e4 LT	181	return 0;
	182	}
	183
	184	static int bt832_probe(struct i2c_adapter *adap)
	185	{
56fc08ca	186	#ifdef I2C_CLASS_TV_ANALOG
1da177e4 LT	187	if (adap->class & I2C_CLASS_TV_ANALOG)
1da177e4 LT	188	return i2c_probe(adap, &addr_data, bt832_attach);
56fc08ca	189	#else
c7a46533	190	if (adap->id == I2C_HW_B_BT848)
56fc08ca MCC	191	return i2c_probe(adap, &addr_data, bt832_attach);
56fc08ca MCC	192	#endif
1da177e4 LT	193	return 0;
	194	}
	195
	196	static int bt832_detach(struct i2c_client *client)
	197	{
56fc08ca	198	struct bt832 *t = i2c_get_clientdata(client);
1da177e4 LT	199
	200	printk("bt832: detach.\n");
	201	i2c_detach_client(client);
	202	kfree(t);
	203	return 0;
	204	}
	205
	206	static int
	207	bt832_command(struct i2c_client client, unsigned int cmd, void arg)
	208	{
56fc08ca	209	struct bt832 *t = i2c_get_clientdata(client);
1da177e4 LT	210
	211	printk("bt832: command %x\n",cmd);
	212
4ac97914	213	switch (cmd) {
1da177e4 LT	214	case BT832_HEXDUMP: {
	215	unsigned char *buf;
	216	buf=kmalloc(65,GFP_KERNEL);
	217	bt832_hexdump(&t->client,buf);
	218	kfree(buf);
	219	}
	220	break;
	221	case BT832_REATTACH:
	222	printk("bt832: re-attach\n");
	223	i2c_del_driver(&driver);
	224	i2c_add_driver(&driver);
	225	break;
	226	}
	227	return 0;
	228	}
	229
	230	/* ----------------------------------------------------------------------- */
	231
	232	static struct i2c_driver driver = {
	233	.owner = THIS_MODULE,
afd1a0c9 MCC	234	.name = "i2c bt832 driver",
	235	.id = -1, /* FIXME */
	236	.flags = I2C_DF_NOTIFY,
	237	.attach_adapter = bt832_probe,
	238	.detach_client = bt832_detach,
	239	.command = bt832_command,
1da177e4 LT	240	};
	241	static struct i2c_client client_template =
	242	{
fae91e72	243	.name = "bt832",
56fc08ca	244	.flags = I2C_CLIENT_ALLOW_USE,
afd1a0c9	245	.driver = &driver,
1da177e4 LT	246	};
	247
	248
56fc08ca	249	static int __init bt832_init_module(void)
1da177e4	250	{
56fc08ca	251	return i2c_add_driver(&driver);
1da177e4 LT	252	}
1da177e4 LT	253
56fc08ca	254	static void __exit bt832_cleanup_module(void)
1da177e4 LT	255	{
	256	i2c_del_driver(&driver);
	257	}
	258
	259	module_init(bt832_init_module);
	260	module_exit(bt832_cleanup_module);
	261
56fc08ca MCC	262	/*
	263	* Overrides for Emacs so that we follow Linus's tabbing style.
	264	* ---------------------------------------------------------------------------
	265	* Local variables:
	266	* c-basic-offset: 8
	267	* End:
	268	*/