[linux-2.6-block.git] / drivers / video / fbdev / matrox / i2c-matroxfb.c

/*
 *
 * Hardware accelerated Matrox Millennium I, II, Mystique, G100, G200, G400 and G450.
 *
 * (c) 1998-2002 Petr Vandrovec <vandrove@vc.cvut.cz>
 *
 * Version: 1.64 2002/06/10
 *
 * See matroxfb_base.c for contributors.
 *
 */

#include "matroxfb_base.h"
#include "matroxfb_maven.h"
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/i2c-algo-bit.h>

/* MGA-TVO I2C for G200, G400 */
#define MAT_CLK		0x20
#define MAT_DATA	0x10
/* primary head DDC for Mystique(?), G100, G200, G400 */
#define DDC1_CLK	0x08
#define DDC1_DATA	0x02
/* primary head DDC for Millennium, Millennium II */
#define DDC1B_CLK	0x10
#define DDC1B_DATA	0x04
/* secondary head DDC for G400 */
#define DDC2_CLK	0x04
#define DDC2_DATA	0x01

/******************************************************/

struct matroxfb_dh_maven_info {
	struct i2c_bit_adapter	maven;
	struct i2c_bit_adapter	ddc1;
	struct i2c_bit_adapter	ddc2;
};

static int matroxfb_read_gpio(struct matrox_fb_info* minfo) {
	unsigned long flags;
	int v;

	matroxfb_DAC_lock_irqsave(flags);
	v = matroxfb_DAC_in(minfo, DAC_XGENIODATA);
	matroxfb_DAC_unlock_irqrestore(flags);
	return v;
}

static void matroxfb_set_gpio(struct matrox_fb_info* minfo, int mask, int val) {
	unsigned long flags;
	int v;

	matroxfb_DAC_lock_irqsave(flags);
	v = (matroxfb_DAC_in(minfo, DAC_XGENIOCTRL) & mask) | val;
	matroxfb_DAC_out(minfo, DAC_XGENIOCTRL, v);
	/* We must reset GENIODATA very often... XFree plays with this register */
	matroxfb_DAC_out(minfo, DAC_XGENIODATA, 0x00);
	matroxfb_DAC_unlock_irqrestore(flags);
}

/* software I2C functions */
static inline void matroxfb_i2c_set(struct matrox_fb_info* minfo, int mask, int state) {
	if (state)
		state = 0;
	else
		state = mask;
	matroxfb_set_gpio(minfo, ~mask, state);
}

static void matroxfb_gpio_setsda(void* data, int state) {
	struct i2c_bit_adapter* b = data;
	matroxfb_i2c_set(b->minfo, b->mask.data, state);
}

static void matroxfb_gpio_setscl(void* data, int state) {
	struct i2c_bit_adapter* b = data;
	matroxfb_i2c_set(b->minfo, b->mask.clock, state);
}

static int matroxfb_gpio_getsda(void* data) {
	struct i2c_bit_adapter* b = data;
	return (matroxfb_read_gpio(b->minfo) & b->mask.data) ? 1 : 0;
}

static int matroxfb_gpio_getscl(void* data) {
	struct i2c_bit_adapter* b = data;
	return (matroxfb_read_gpio(b->minfo) & b->mask.clock) ? 1 : 0;
}

static const struct i2c_algo_bit_data matrox_i2c_algo_template =
{
	.setsda		= matroxfb_gpio_setsda,
	.setscl		= matroxfb_gpio_setscl,
	.getsda		= matroxfb_gpio_getsda,
	.getscl		= matroxfb_gpio_getscl,
	.udelay		= 10,
	.timeout	= 100,
};

static int i2c_bus_reg(struct i2c_bit_adapter* b, struct matrox_fb_info* minfo, 
		unsigned int data, unsigned int clock, const char *name,
		int class)
{
	int err;

	b->minfo = minfo;
	b->mask.data = data;
	b->mask.clock = clock;
	b->adapter.owner = THIS_MODULE;
	snprintf(b->adapter.name, sizeof(b->adapter.name), name,
		minfo->fbcon.node);
	i2c_set_adapdata(&b->adapter, b);
	b->adapter.class = class;
	b->adapter.algo_data = &b->bac;
	b->adapter.dev.parent = &minfo->pcidev->dev;
	b->bac = matrox_i2c_algo_template;
	b->bac.data = b;
	err = i2c_bit_add_bus(&b->adapter);
	b->initialized = !err;
	return err;
}

static void i2c_bit_bus_del(struct i2c_bit_adapter* b) {
	if (b->initialized) {
		i2c_del_adapter(&b->adapter);
		b->initialized = 0;
	}
}

static inline void i2c_maven_done(struct matroxfb_dh_maven_info* minfo2) {
	i2c_bit_bus_del(&minfo2->maven);
}

static inline void i2c_ddc1_done(struct matroxfb_dh_maven_info* minfo2) {
	i2c_bit_bus_del(&minfo2->ddc1);
}

static inline void i2c_ddc2_done(struct matroxfb_dh_maven_info* minfo2) {
	i2c_bit_bus_del(&minfo2->ddc2);
}

static void* i2c_matroxfb_probe(struct matrox_fb_info* minfo) {
	int err;
	unsigned long flags;
	struct matroxfb_dh_maven_info* m2info;

	m2info = kzalloc(sizeof(*m2info), GFP_KERNEL);
	if (!m2info)
		return NULL;

	matroxfb_DAC_lock_irqsave(flags);
	matroxfb_DAC_out(minfo, DAC_XGENIODATA, 0xFF);
	matroxfb_DAC_out(minfo, DAC_XGENIOCTRL, 0x00);
	matroxfb_DAC_unlock_irqrestore(flags);

	switch (minfo->chip) {
		case MGA_2064:
		case MGA_2164:
			err = i2c_bus_reg(&m2info->ddc1, minfo,
					  DDC1B_DATA, DDC1B_CLK,
					  "DDC:fb%u #0", I2C_CLASS_DDC);
			break;
		default:
			err = i2c_bus_reg(&m2info->ddc1, minfo,
					  DDC1_DATA, DDC1_CLK,
					  "DDC:fb%u #0", I2C_CLASS_DDC);
			break;
	}
	if (err)
		goto fail_ddc1;
	if (minfo->devflags.dualhead) {
		err = i2c_bus_reg(&m2info->ddc2, minfo,
				  DDC2_DATA, DDC2_CLK,
				  "DDC:fb%u #1", I2C_CLASS_DDC);
		if (err == -ENODEV) {
			printk(KERN_INFO "i2c-matroxfb: VGA->TV plug detected, DDC unavailable.\n");
		} else if (err)
			printk(KERN_INFO "i2c-matroxfb: Could not register secondary output i2c bus. Continuing anyway.\n");
		/* Register maven bus even on G450/G550 */
		err = i2c_bus_reg(&m2info->maven, minfo,
				  MAT_DATA, MAT_CLK, "MAVEN:fb%u", 0);
		if (err)
			printk(KERN_INFO "i2c-matroxfb: Could not register Maven i2c bus. Continuing anyway.\n");
		else {
			struct i2c_board_info maven_info = {
				I2C_BOARD_INFO("maven", 0x1b),
			};
			unsigned short const addr_list[2] = {
				0x1b, I2C_CLIENT_END
			};

			i2c_new_probed_device(&m2info->maven.adapter,
					      &maven_info, addr_list, NULL);
		}
	}
	return m2info;
fail_ddc1:;
	kfree(m2info);
	printk(KERN_ERR "i2c-matroxfb: Could not register primary adapter DDC bus.\n");
	return NULL;
}

static void i2c_matroxfb_remove(struct matrox_fb_info* minfo, void* data) {
	struct matroxfb_dh_maven_info* m2info = data;

	i2c_maven_done(m2info);
	i2c_ddc2_done(m2info);
	i2c_ddc1_done(m2info);
	kfree(m2info);
}

static struct matroxfb_driver i2c_matroxfb = {
	.node =		LIST_HEAD_INIT(i2c_matroxfb.node),
	.name =		"i2c-matroxfb",
	.probe = 	i2c_matroxfb_probe,
	.remove =	i2c_matroxfb_remove,
};

static int __init i2c_matroxfb_init(void) {
	if (matroxfb_register_driver(&i2c_matroxfb)) {
		printk(KERN_ERR "i2c-matroxfb: failed to register driver\n");
		return -ENXIO;
	}
	return 0;
}

static void __exit i2c_matroxfb_exit(void) {
	matroxfb_unregister_driver(&i2c_matroxfb);
}

MODULE_AUTHOR("(c) 1999-2002 Petr Vandrovec <vandrove@vc.cvut.cz>");
MODULE_DESCRIPTION("Support module providing I2C buses present on Matrox videocards");

module_init(i2c_matroxfb_init);
module_exit(i2c_matroxfb_exit);
/* no __setup required */
MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4 LT	1	/*
	2	*
	3	* Hardware accelerated Matrox Millennium I, II, Mystique, G100, G200, G400 and G450.
	4	*
	5	* (c) 1998-2002 Petr Vandrovec <vandrove@vc.cvut.cz>
	6	*
	7	* Version: 1.64 2002/06/10
	8	*
	9	* See matroxfb_base.c for contributors.
	10	*
	11	*/
	12
	13	#include "matroxfb_base.h"
	14	#include "matroxfb_maven.h"
	15	#include <linux/i2c.h>
5a0e3ad6	16	#include <linux/slab.h>
1da177e4 LT	17	#include <linux/i2c-algo-bit.h>
	18
	19	/* MGA-TVO I2C for G200, G400 */
	20	#define MAT_CLK 0x20
	21	#define MAT_DATA 0x10
	22	/* primary head DDC for Mystique(?), G100, G200, G400 */
	23	#define DDC1_CLK 0x08
	24	#define DDC1_DATA 0x02
	25	/* primary head DDC for Millennium, Millennium II */
	26	#define DDC1B_CLK 0x10
	27	#define DDC1B_DATA 0x04
	28	/* secondary head DDC for G400 */
	29	#define DDC2_CLK 0x04
	30	#define DDC2_DATA 0x01
	31
	32	/******************************************************/
	33
	34	struct matroxfb_dh_maven_info {
	35	struct i2c_bit_adapter maven;
	36	struct i2c_bit_adapter ddc1;
	37	struct i2c_bit_adapter ddc2;
	38	};
	39
	40	static int matroxfb_read_gpio(struct matrox_fb_info* minfo) {
	41	unsigned long flags;
	42	int v;
	43
	44	matroxfb_DAC_lock_irqsave(flags);
316b4d64	45	v = matroxfb_DAC_in(minfo, DAC_XGENIODATA);
1da177e4 LT	46	matroxfb_DAC_unlock_irqrestore(flags);
	47	return v;
	48	}
	49
	50	static void matroxfb_set_gpio(struct matrox_fb_info* minfo, int mask, int val) {
	51	unsigned long flags;
	52	int v;
	53
	54	matroxfb_DAC_lock_irqsave(flags);
316b4d64 JD	55	v = (matroxfb_DAC_in(minfo, DAC_XGENIOCTRL) & mask) \| val;
316b4d64 JD	56	matroxfb_DAC_out(minfo, DAC_XGENIOCTRL, v);
1da177e4	57	/* We must reset GENIODATA very often... XFree plays with this register */
316b4d64	58	matroxfb_DAC_out(minfo, DAC_XGENIODATA, 0x00);
1da177e4 LT	59	matroxfb_DAC_unlock_irqrestore(flags);
	60	}
	61
	62	/* software I2C functions */
	63	static inline void matroxfb_i2c_set(struct matrox_fb_info* minfo, int mask, int state) {
	64	if (state)
	65	state = 0;
	66	else
	67	state = mask;
	68	matroxfb_set_gpio(minfo, ~mask, state);
	69	}
	70
	71	static void matroxfb_gpio_setsda(void* data, int state) {
	72	struct i2c_bit_adapter* b = data;
	73	matroxfb_i2c_set(b->minfo, b->mask.data, state);
	74	}
	75
	76	static void matroxfb_gpio_setscl(void* data, int state) {
	77	struct i2c_bit_adapter* b = data;
	78	matroxfb_i2c_set(b->minfo, b->mask.clock, state);
	79	}
	80
	81	static int matroxfb_gpio_getsda(void* data) {
	82	struct i2c_bit_adapter* b = data;
	83	return (matroxfb_read_gpio(b->minfo) & b->mask.data) ? 1 : 0;
	84	}
	85
	86	static int matroxfb_gpio_getscl(void* data) {
	87	struct i2c_bit_adapter* b = data;
	88	return (matroxfb_read_gpio(b->minfo) & b->mask.clock) ? 1 : 0;
	89	}
	90
73b7d92f	91	static const struct i2c_algo_bit_data matrox_i2c_algo_template =
1da177e4	92	{
8241cb14 JD	93	.setsda = matroxfb_gpio_setsda,
	94	.setscl = matroxfb_gpio_setscl,
	95	.getsda = matroxfb_gpio_getsda,
	96	.getscl = matroxfb_gpio_getscl,
	97	.udelay = 10,
8241cb14	98	.timeout = 100,
1da177e4 LT	99	};
	100
	101	static int i2c_bus_reg(struct i2c_bit_adapter* b, struct matrox_fb_info* minfo,
c1b6b4f2 JD	102	unsigned int data, unsigned int clock, const char *name,
	103	int class)
	104	{
1da177e4 LT	105	int err;
	106
	107	b->minfo = minfo;
	108	b->mask.data = data;
	109	b->mask.clock = clock;
73b7d92f	110	b->adapter.owner = THIS_MODULE;
2096b956	111	snprintf(b->adapter.name, sizeof(b->adapter.name), name,
1da177e4 LT	112	minfo->fbcon.node);
1da177e4 LT	113	i2c_set_adapdata(&b->adapter, b);
c1b6b4f2	114	b->adapter.class = class;
1da177e4	115	b->adapter.algo_data = &b->bac;
fc2d10dd	116	b->adapter.dev.parent = &minfo->pcidev->dev;
1da177e4 LT	117	b->bac = matrox_i2c_algo_template;
	118	b->bac.data = b;
	119	err = i2c_bit_add_bus(&b->adapter);
	120	b->initialized = !err;
	121	return err;
	122	}
	123
	124	static void i2c_bit_bus_del(struct i2c_bit_adapter* b) {
	125	if (b->initialized) {
3269711b	126	i2c_del_adapter(&b->adapter);
1da177e4 LT	127	b->initialized = 0;
	128	}
	129	}
	130
	131	static inline void i2c_maven_done(struct matroxfb_dh_maven_info* minfo2) {
	132	i2c_bit_bus_del(&minfo2->maven);
	133	}
	134
	135	static inline void i2c_ddc1_done(struct matroxfb_dh_maven_info* minfo2) {
	136	i2c_bit_bus_del(&minfo2->ddc1);
	137	}
	138
	139	static inline void i2c_ddc2_done(struct matroxfb_dh_maven_info* minfo2) {
	140	i2c_bit_bus_del(&minfo2->ddc2);
	141	}
	142
	143	static void* i2c_matroxfb_probe(struct matrox_fb_info* minfo) {
	144	int err;
	145	unsigned long flags;
	146	struct matroxfb_dh_maven_info* m2info;
	147
2fdbe5cf	148	m2info = kzalloc(sizeof(*m2info), GFP_KERNEL);
1da177e4 LT	149	if (!m2info)
	150	return NULL;
	151
	152	matroxfb_DAC_lock_irqsave(flags);
316b4d64 JD	153	matroxfb_DAC_out(minfo, DAC_XGENIODATA, 0xFF);
316b4d64 JD	154	matroxfb_DAC_out(minfo, DAC_XGENIOCTRL, 0x00);
1da177e4 LT	155	matroxfb_DAC_unlock_irqrestore(flags);
1da177e4 LT	156
fc2d10dd	157	switch (minfo->chip) {
1da177e4 LT	158	case MGA_2064:
1da177e4 LT	159	case MGA_2164:
c1b6b4f2 JD	160	err = i2c_bus_reg(&m2info->ddc1, minfo,
	161	DDC1B_DATA, DDC1B_CLK,
	162	"DDC:fb%u #0", I2C_CLASS_DDC);
1da177e4 LT	163	break;
1da177e4 LT	164	default:
c1b6b4f2 JD	165	err = i2c_bus_reg(&m2info->ddc1, minfo,
	166	DDC1_DATA, DDC1_CLK,
	167	"DDC:fb%u #0", I2C_CLASS_DDC);
1da177e4 LT	168	break;
	169	}
	170	if (err)
	171	goto fail_ddc1;
fc2d10dd	172	if (minfo->devflags.dualhead) {
c1b6b4f2 JD	173	err = i2c_bus_reg(&m2info->ddc2, minfo,
	174	DDC2_DATA, DDC2_CLK,
	175	"DDC:fb%u #1", I2C_CLASS_DDC);
1da177e4 LT	176	if (err == -ENODEV) {
	177	printk(KERN_INFO "i2c-matroxfb: VGA->TV plug detected, DDC unavailable.\n");
	178	} else if (err)
	179	printk(KERN_INFO "i2c-matroxfb: Could not register secondary output i2c bus. Continuing anyway.\n");
	180	/* Register maven bus even on G450/G550 */
c1b6b4f2 JD	181	err = i2c_bus_reg(&m2info->maven, minfo,
c1b6b4f2 JD	182	MAT_DATA, MAT_CLK, "MAVEN:fb%u", 0);
1da177e4 LT	183	if (err)
1da177e4 LT	184	printk(KERN_INFO "i2c-matroxfb: Could not register Maven i2c bus. Continuing anyway.\n");
10546355 JD	185	else {
	186	struct i2c_board_info maven_info = {
	187	I2C_BOARD_INFO("maven", 0x1b),
	188	};
	189	unsigned short const addr_list[2] = {
	190	0x1b, I2C_CLIENT_END
	191	};
	192
	193	i2c_new_probed_device(&m2info->maven.adapter,
9a94241a	194	&maven_info, addr_list, NULL);
10546355	195	}
1da177e4 LT	196	}
	197	return m2info;
	198	fail_ddc1:;
	199	kfree(m2info);
	200	printk(KERN_ERR "i2c-matroxfb: Could not register primary adapter DDC bus.\n");
	201	return NULL;
	202	}
	203
	204	static void i2c_matroxfb_remove(struct matrox_fb_info* minfo, void* data) {
	205	struct matroxfb_dh_maven_info* m2info = data;
	206
	207	i2c_maven_done(m2info);
	208	i2c_ddc2_done(m2info);
	209	i2c_ddc1_done(m2info);
	210	kfree(m2info);
	211	}
	212
	213	static struct matroxfb_driver i2c_matroxfb = {
	214	.node = LIST_HEAD_INIT(i2c_matroxfb.node),
	215	.name = "i2c-matroxfb",
	216	.probe = i2c_matroxfb_probe,
	217	.remove = i2c_matroxfb_remove,
	218	};
	219
	220	static int __init i2c_matroxfb_init(void) {
	221	if (matroxfb_register_driver(&i2c_matroxfb)) {
	222	printk(KERN_ERR "i2c-matroxfb: failed to register driver\n");
	223	return -ENXIO;
	224	}
	225	return 0;
	226	}
	227
	228	static void __exit i2c_matroxfb_exit(void) {
	229	matroxfb_unregister_driver(&i2c_matroxfb);
	230	}
	231
	232	MODULE_AUTHOR("(c) 1999-2002 Petr Vandrovec <vandrove@vc.cvut.cz>");
	233	MODULE_DESCRIPTION("Support module providing I2C buses present on Matrox videocards");
	234
	235	module_init(i2c_matroxfb_init);
	236	module_exit(i2c_matroxfb_exit);
	237	/* no __setup required */
	238	MODULE_LICENSE("GPL");