[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / video / 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/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(PMINFO 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(PMINFO DAC_XGENIOCTRL) & mask) | val;
	matroxfb_DAC_out(PMINFO DAC_XGENIOCTRL, v);
	/* We must reset GENIODATA very often... XFree plays with this register */
	matroxfb_DAC_out(PMINFO 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 struct i2c_adapter matrox_i2c_adapter_template =
{
	.owner =	THIS_MODULE,
	.id =		I2C_HW_B_G400,
};

static 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 err;

	b->minfo = minfo;
	b->mask.data = data;
	b->mask.clock = clock;
	b->adapter = matrox_i2c_adapter_template;
	snprintf(b->adapter.name, I2C_NAME_SIZE, name,
		minfo->fbcon.node);
	i2c_set_adapdata(&b->adapter, b);
	b->adapter.algo_data = &b->bac;
	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 = (struct matroxfb_dh_maven_info*)kmalloc(sizeof(*m2info), GFP_KERNEL);
	if (!m2info)
		return NULL;

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

	memset(m2info, 0, sizeof(*m2info));

	switch (ACCESS_FBINFO(chip)) {
		case MGA_2064:
		case MGA_2164:
			err = i2c_bus_reg(&m2info->ddc1, minfo, DDC1B_DATA, DDC1B_CLK, "DDC:fb%u #0");
			break;
		default:
			err = i2c_bus_reg(&m2info->ddc1, minfo, DDC1_DATA, DDC1_CLK, "DDC:fb%u #0");
			break;
	}
	if (err)
		goto fail_ddc1;
	if (ACCESS_FBINFO(devflags.dualhead)) {
		err = i2c_bus_reg(&m2info->ddc2, minfo, DDC2_DATA, DDC2_CLK, "DDC:fb%u #1");
		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");
		if (err)
			printk(KERN_INFO "i2c-matroxfb: Could not register Maven i2c bus. Continuing anyway.\n");
	}
	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>
	16	#include <linux/i2c-algo-bit.h>
	17
	18	/* MGA-TVO I2C for G200, G400 */
	19	#define MAT_CLK 0x20
	20	#define MAT_DATA 0x10
	21	/* primary head DDC for Mystique(?), G100, G200, G400 */
	22	#define DDC1_CLK 0x08
	23	#define DDC1_DATA 0x02
	24	/* primary head DDC for Millennium, Millennium II */
	25	#define DDC1B_CLK 0x10
	26	#define DDC1B_DATA 0x04
	27	/* secondary head DDC for G400 */
	28	#define DDC2_CLK 0x04
	29	#define DDC2_DATA 0x01
	30
	31	/******************************************************/
	32
	33	struct matroxfb_dh_maven_info {
	34	struct i2c_bit_adapter maven;
	35	struct i2c_bit_adapter ddc1;
	36	struct i2c_bit_adapter ddc2;
	37	};
	38
	39	static int matroxfb_read_gpio(struct matrox_fb_info* minfo) {
	40	unsigned long flags;
	41	int v;
	42
	43	matroxfb_DAC_lock_irqsave(flags);
	44	v = matroxfb_DAC_in(PMINFO DAC_XGENIODATA);
	45	matroxfb_DAC_unlock_irqrestore(flags);
	46	return v;
	47	}
	48
	49	static void matroxfb_set_gpio(struct matrox_fb_info* minfo, int mask, int val) {
	50	unsigned long flags;
	51	int v;
	52
	53	matroxfb_DAC_lock_irqsave(flags);
	54	v = (matroxfb_DAC_in(PMINFO DAC_XGENIOCTRL) & mask) \| val;
	55	matroxfb_DAC_out(PMINFO DAC_XGENIOCTRL, v);
	56	/* We must reset GENIODATA very often... XFree plays with this register */
	57	matroxfb_DAC_out(PMINFO DAC_XGENIODATA, 0x00);
	58	matroxfb_DAC_unlock_irqrestore(flags);
	59	}
	60
	61	/* software I2C functions */
	62	static inline void matroxfb_i2c_set(struct matrox_fb_info* minfo, int mask, int state) {
	63	if (state)
	64	state = 0;
65	else
66	state = mask;
67	matroxfb_set_gpio(minfo, ~mask, state);
68	}
69
70	static void matroxfb_gpio_setsda(void* data, int state) {
71	struct i2c_bit_adapter* b = data;
72	matroxfb_i2c_set(b->minfo, b->mask.data, state);
73	}
74
75	static void matroxfb_gpio_setscl(void* data, int state) {
76	struct i2c_bit_adapter* b = data;
77	matroxfb_i2c_set(b->minfo, b->mask.clock, state);
78	}
79
80	static int matroxfb_gpio_getsda(void* data) {
81	struct i2c_bit_adapter* b = data;
82	return (matroxfb_read_gpio(b->minfo) & b->mask.data) ? 1 : 0;
83	}
84
85	static int matroxfb_gpio_getscl(void* data) {
86	struct i2c_bit_adapter* b = data;
87	return (matroxfb_read_gpio(b->minfo) & b->mask.clock) ? 1 : 0;
88	}
89
90	static struct i2c_adapter matrox_i2c_adapter_template =
91	{
92	.owner = THIS_MODULE,
93	.id = I2C_HW_B_G400,
94	};
95
96	static struct i2c_algo_bit_data matrox_i2c_algo_template =
97	{
8241cb14 JD	98	.setsda = matroxfb_gpio_setsda,
	99	.setscl = matroxfb_gpio_setscl,
	100	.getsda = matroxfb_gpio_getsda,
	101	.getscl = matroxfb_gpio_getscl,
	102	.udelay = 10,
8241cb14	103	.timeout = 100,
1da177e4 LT	104	};
	105
	106	static int i2c_bus_reg(struct i2c_bit_adapter* b, struct matrox_fb_info* minfo,
	107	unsigned int data, unsigned int clock, const char* name) {
	108	int err;
	109
	110	b->minfo = minfo;
	111	b->mask.data = data;
	112	b->mask.clock = clock;
	113	b->adapter = matrox_i2c_adapter_template;
	114	snprintf(b->adapter.name, I2C_NAME_SIZE, name,
	115	minfo->fbcon.node);
	116	i2c_set_adapdata(&b->adapter, b);
	117	b->adapter.algo_data = &b->bac;
	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
	149	m2info = (struct matroxfb_dh_maven_info)kmalloc(sizeof(m2info), GFP_KERNEL);
	150	if (!m2info)
	151	return NULL;
	152
	153	matroxfb_DAC_lock_irqsave(flags);
	154	matroxfb_DAC_out(PMINFO DAC_XGENIODATA, 0xFF);
	155	matroxfb_DAC_out(PMINFO DAC_XGENIOCTRL, 0x00);
	156	matroxfb_DAC_unlock_irqrestore(flags);
	157
	158	memset(m2info, 0, sizeof(*m2info));
	159
	160	switch (ACCESS_FBINFO(chip)) {
	161	case MGA_2064:
	162	case MGA_2164:
	163	err = i2c_bus_reg(&m2info->ddc1, minfo, DDC1B_DATA, DDC1B_CLK, "DDC:fb%u #0");
	164	break;
	165	default:
	166	err = i2c_bus_reg(&m2info->ddc1, minfo, DDC1_DATA, DDC1_CLK, "DDC:fb%u #0");
	167	break;
	168	}
	169	if (err)
	170	goto fail_ddc1;
	171	if (ACCESS_FBINFO(devflags.dualhead)) {
	172	err = i2c_bus_reg(&m2info->ddc2, minfo, DDC2_DATA, DDC2_CLK, "DDC:fb%u #1");
	173	if (err == -ENODEV) {
	174	printk(KERN_INFO "i2c-matroxfb: VGA->TV plug detected, DDC unavailable.\n");
	175	} else if (err)
	176	printk(KERN_INFO "i2c-matroxfb: Could not register secondary output i2c bus. Continuing anyway.\n");
	177	/* Register maven bus even on G450/G550 */
	178	err = i2c_bus_reg(&m2info->maven, minfo, MAT_DATA, MAT_CLK, "MAVEN:fb%u");
	179	if (err)
	180	printk(KERN_INFO "i2c-matroxfb: Could not register Maven i2c bus. Continuing anyway.\n");
	181	}
	182	return m2info;
	183	fail_ddc1:;
	184	kfree(m2info);
	185	printk(KERN_ERR "i2c-matroxfb: Could not register primary adapter DDC bus.\n");
	186	return NULL;
	187	}
	188
	189	static void i2c_matroxfb_remove(struct matrox_fb_info* minfo, void* data) {
	190	struct matroxfb_dh_maven_info* m2info = data;
	191
192	i2c_maven_done(m2info);
193	i2c_ddc2_done(m2info);
194	i2c_ddc1_done(m2info);
195	kfree(m2info);
196	}
197
198	static struct matroxfb_driver i2c_matroxfb = {
199	.node = LIST_HEAD_INIT(i2c_matroxfb.node),
200	.name = "i2c-matroxfb",
201	.probe = i2c_matroxfb_probe,
202	.remove = i2c_matroxfb_remove,
203	};
204
205	static int __init i2c_matroxfb_init(void) {
206	if (matroxfb_register_driver(&i2c_matroxfb)) {
207	printk(KERN_ERR "i2c-matroxfb: failed to register driver\n");
208	return -ENXIO;
209	}
210	return 0;
211	}
212
213	static void __exit i2c_matroxfb_exit(void) {
214	matroxfb_unregister_driver(&i2c_matroxfb);
215	}
216
217	MODULE_AUTHOR("(c) 1999-2002 Petr Vandrovec <vandrove@vc.cvut.cz>");
218	MODULE_DESCRIPTION("Support module providing I2C buses present on Matrox videocards");
219
220	module_init(i2c_matroxfb_init);
221	module_exit(i2c_matroxfb_exit);
222	/* no __setup required */
223	MODULE_LICENSE("GPL");