[mirror_ubuntu-hirsute-kernel.git] / drivers / video / fbdev / matrox / i2c-matroxfb.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 *
 * 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
09c434b8	1	// SPDX-License-Identifier: GPL-2.0-only
1da177e4 LT	2	/*
	3	*
	4	* Hardware accelerated Matrox Millennium I, II, Mystique, G100, G200, G400 and G450.
	5	*
	6	* (c) 1998-2002 Petr Vandrovec <vandrove@vc.cvut.cz>
	7	*
	8	* Version: 1.64 2002/06/10
	9	*
	10	* See matroxfb_base.c for contributors.
	11	*
	12	*/
	13
	14	#include "matroxfb_base.h"
	15	#include "matroxfb_maven.h"
	16	#include <linux/i2c.h>
5a0e3ad6	17	#include <linux/slab.h>
1da177e4 LT	18	#include <linux/i2c-algo-bit.h>
	19
	20	/* MGA-TVO I2C for G200, G400 */
	21	#define MAT_CLK 0x20
	22	#define MAT_DATA 0x10
	23	/* primary head DDC for Mystique(?), G100, G200, G400 */
	24	#define DDC1_CLK 0x08
	25	#define DDC1_DATA 0x02
	26	/* primary head DDC for Millennium, Millennium II */
	27	#define DDC1B_CLK 0x10
	28	#define DDC1B_DATA 0x04
	29	/* secondary head DDC for G400 */
	30	#define DDC2_CLK 0x04
	31	#define DDC2_DATA 0x01
	32
	33	/******************************************************/
	34
	35	struct matroxfb_dh_maven_info {
	36	struct i2c_bit_adapter maven;
	37	struct i2c_bit_adapter ddc1;
	38	struct i2c_bit_adapter ddc2;
	39	};
	40
	41	static int matroxfb_read_gpio(struct matrox_fb_info* minfo) {
	42	unsigned long flags;
	43	int v;
	44
	45	matroxfb_DAC_lock_irqsave(flags);
316b4d64	46	v = matroxfb_DAC_in(minfo, DAC_XGENIODATA);
1da177e4 LT	47	matroxfb_DAC_unlock_irqrestore(flags);
	48	return v;
	49	}
	50
	51	static void matroxfb_set_gpio(struct matrox_fb_info* minfo, int mask, int val) {
	52	unsigned long flags;
	53	int v;
	54
	55	matroxfb_DAC_lock_irqsave(flags);
316b4d64 JD	56	v = (matroxfb_DAC_in(minfo, DAC_XGENIOCTRL) & mask) \| val;
316b4d64 JD	57	matroxfb_DAC_out(minfo, DAC_XGENIOCTRL, v);
1da177e4	58	/* We must reset GENIODATA very often... XFree plays with this register */
316b4d64	59	matroxfb_DAC_out(minfo, DAC_XGENIODATA, 0x00);
1da177e4 LT	60	matroxfb_DAC_unlock_irqrestore(flags);
	61	}
	62
	63	/* software I2C functions */
	64	static inline void matroxfb_i2c_set(struct matrox_fb_info* minfo, int mask, int state) {
	65	if (state)
	66	state = 0;
	67	else
	68	state = mask;
	69	matroxfb_set_gpio(minfo, ~mask, state);
	70	}
	71
	72	static void matroxfb_gpio_setsda(void* data, int state) {
	73	struct i2c_bit_adapter* b = data;
	74	matroxfb_i2c_set(b->minfo, b->mask.data, state);
	75	}
	76
	77	static void matroxfb_gpio_setscl(void* data, int state) {
	78	struct i2c_bit_adapter* b = data;
	79	matroxfb_i2c_set(b->minfo, b->mask.clock, state);
	80	}
	81
	82	static int matroxfb_gpio_getsda(void* data) {
	83	struct i2c_bit_adapter* b = data;
	84	return (matroxfb_read_gpio(b->minfo) & b->mask.data) ? 1 : 0;
	85	}
	86
	87	static int matroxfb_gpio_getscl(void* data) {
	88	struct i2c_bit_adapter* b = data;
	89	return (matroxfb_read_gpio(b->minfo) & b->mask.clock) ? 1 : 0;
	90	}
	91
73b7d92f	92	static const struct i2c_algo_bit_data matrox_i2c_algo_template =
1da177e4	93	{
8241cb14 JD	94	.setsda = matroxfb_gpio_setsda,
	95	.setscl = matroxfb_gpio_setscl,
	96	.getsda = matroxfb_gpio_getsda,
	97	.getscl = matroxfb_gpio_getscl,
	98	.udelay = 10,
8241cb14	99	.timeout = 100,
1da177e4 LT	100	};
	101
	102	static int i2c_bus_reg(struct i2c_bit_adapter* b, struct matrox_fb_info* minfo,
c1b6b4f2 JD	103	unsigned int data, unsigned int clock, const char *name,
	104	int class)
	105	{
1da177e4 LT	106	int err;
	107
	108	b->minfo = minfo;
	109	b->mask.data = data;
	110	b->mask.clock = clock;
73b7d92f	111	b->adapter.owner = THIS_MODULE;
2096b956	112	snprintf(b->adapter.name, sizeof(b->adapter.name), name,
1da177e4 LT	113	minfo->fbcon.node);
1da177e4 LT	114	i2c_set_adapdata(&b->adapter, b);
c1b6b4f2	115	b->adapter.class = class;
1da177e4	116	b->adapter.algo_data = &b->bac;
fc2d10dd	117	b->adapter.dev.parent = &minfo->pcidev->dev;
1da177e4 LT	118	b->bac = matrox_i2c_algo_template;
	119	b->bac.data = b;
	120	err = i2c_bit_add_bus(&b->adapter);
	121	b->initialized = !err;
	122	return err;
	123	}
	124
	125	static void i2c_bit_bus_del(struct i2c_bit_adapter* b) {
	126	if (b->initialized) {
3269711b	127	i2c_del_adapter(&b->adapter);
1da177e4 LT	128	b->initialized = 0;
	129	}
	130	}
	131
	132	static inline void i2c_maven_done(struct matroxfb_dh_maven_info* minfo2) {
	133	i2c_bit_bus_del(&minfo2->maven);
	134	}
	135
	136	static inline void i2c_ddc1_done(struct matroxfb_dh_maven_info* minfo2) {
	137	i2c_bit_bus_del(&minfo2->ddc1);
	138	}
	139
	140	static inline void i2c_ddc2_done(struct matroxfb_dh_maven_info* minfo2) {
	141	i2c_bit_bus_del(&minfo2->ddc2);
	142	}
	143
	144	static void* i2c_matroxfb_probe(struct matrox_fb_info* minfo) {
	145	int err;
	146	unsigned long flags;
	147	struct matroxfb_dh_maven_info* m2info;
	148
2fdbe5cf	149	m2info = kzalloc(sizeof(*m2info), GFP_KERNEL);
1da177e4 LT	150	if (!m2info)
	151	return NULL;
	152
	153	matroxfb_DAC_lock_irqsave(flags);
316b4d64 JD	154	matroxfb_DAC_out(minfo, DAC_XGENIODATA, 0xFF);
316b4d64 JD	155	matroxfb_DAC_out(minfo, DAC_XGENIOCTRL, 0x00);
1da177e4 LT	156	matroxfb_DAC_unlock_irqrestore(flags);
1da177e4 LT	157
fc2d10dd	158	switch (minfo->chip) {
1da177e4 LT	159	case MGA_2064:
1da177e4 LT	160	case MGA_2164:
c1b6b4f2 JD	161	err = i2c_bus_reg(&m2info->ddc1, minfo,
	162	DDC1B_DATA, DDC1B_CLK,
	163	"DDC:fb%u #0", I2C_CLASS_DDC);
1da177e4 LT	164	break;
1da177e4 LT	165	default:
c1b6b4f2 JD	166	err = i2c_bus_reg(&m2info->ddc1, minfo,
	167	DDC1_DATA, DDC1_CLK,
	168	"DDC:fb%u #0", I2C_CLASS_DDC);
1da177e4 LT	169	break;
	170	}
	171	if (err)
	172	goto fail_ddc1;
fc2d10dd	173	if (minfo->devflags.dualhead) {
c1b6b4f2 JD	174	err = i2c_bus_reg(&m2info->ddc2, minfo,
	175	DDC2_DATA, DDC2_CLK,
	176	"DDC:fb%u #1", I2C_CLASS_DDC);
1da177e4 LT	177	if (err == -ENODEV) {
	178	printk(KERN_INFO "i2c-matroxfb: VGA->TV plug detected, DDC unavailable.\n");
	179	} else if (err)
	180	printk(KERN_INFO "i2c-matroxfb: Could not register secondary output i2c bus. Continuing anyway.\n");
	181	/* Register maven bus even on G450/G550 */
c1b6b4f2 JD	182	err = i2c_bus_reg(&m2info->maven, minfo,
c1b6b4f2 JD	183	MAT_DATA, MAT_CLK, "MAVEN:fb%u", 0);
1da177e4 LT	184	if (err)
1da177e4 LT	185	printk(KERN_INFO "i2c-matroxfb: Could not register Maven i2c bus. Continuing anyway.\n");
10546355 JD	186	else {
	187	struct i2c_board_info maven_info = {
	188	I2C_BOARD_INFO("maven", 0x1b),
	189	};
	190	unsigned short const addr_list[2] = {
	191	0x1b, I2C_CLIENT_END
	192	};
	193
	194	i2c_new_probed_device(&m2info->maven.adapter,
9a94241a	195	&maven_info, addr_list, NULL);
10546355	196	}
1da177e4 LT	197	}
	198	return m2info;
	199	fail_ddc1:;
	200	kfree(m2info);
	201	printk(KERN_ERR "i2c-matroxfb: Could not register primary adapter DDC bus.\n");
	202	return NULL;
	203	}
	204
	205	static void i2c_matroxfb_remove(struct matrox_fb_info* minfo, void* data) {
	206	struct matroxfb_dh_maven_info* m2info = data;
	207
	208	i2c_maven_done(m2info);
	209	i2c_ddc2_done(m2info);
	210	i2c_ddc1_done(m2info);
	211	kfree(m2info);
	212	}
	213
	214	static struct matroxfb_driver i2c_matroxfb = {
	215	.node = LIST_HEAD_INIT(i2c_matroxfb.node),
	216	.name = "i2c-matroxfb",
	217	.probe = i2c_matroxfb_probe,
	218	.remove = i2c_matroxfb_remove,
	219	};
	220
	221	static int __init i2c_matroxfb_init(void) {
	222	if (matroxfb_register_driver(&i2c_matroxfb)) {
	223	printk(KERN_ERR "i2c-matroxfb: failed to register driver\n");
	224	return -ENXIO;
	225	}
	226	return 0;
	227	}
	228
	229	static void __exit i2c_matroxfb_exit(void) {
	230	matroxfb_unregister_driver(&i2c_matroxfb);
	231	}
	232
	233	MODULE_AUTHOR("(c) 1999-2002 Petr Vandrovec <vandrove@vc.cvut.cz>");
	234	MODULE_DESCRIPTION("Support module providing I2C buses present on Matrox videocards");
	235
	236	module_init(i2c_matroxfb_init);
	237	module_exit(i2c_matroxfb_exit);
	238	/* no __setup required */
	239	MODULE_LICENSE("GPL");