[deliverable/linux.git] / drivers / video / aty / radeon_i2c.c

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/fb.h>


#include <linux/i2c.h>
#include <linux/i2c-id.h>
#include <linux/i2c-algo-bit.h>

#include <asm/io.h>

#include <video/radeon.h>
#include "radeonfb.h"
#include "../edid.h"

static void radeon_gpio_setscl(void* data, int state)
{
	struct radeon_i2c_chan 	*chan = data;
	struct radeonfb_info	*rinfo = chan->rinfo;
	u32			val;
	
	val = INREG(chan->ddc_reg) & ~(VGA_DDC_CLK_OUT_EN);
	if (!state)
		val |= VGA_DDC_CLK_OUT_EN;

	OUTREG(chan->ddc_reg, val);
	(void)INREG(chan->ddc_reg);
}

static void radeon_gpio_setsda(void* data, int state)
{
	struct radeon_i2c_chan 	*chan = data;
	struct radeonfb_info	*rinfo = chan->rinfo;
	u32			val;
	
	val = INREG(chan->ddc_reg) & ~(VGA_DDC_DATA_OUT_EN);
	if (!state)
		val |= VGA_DDC_DATA_OUT_EN;

	OUTREG(chan->ddc_reg, val);
	(void)INREG(chan->ddc_reg);
}

static int radeon_gpio_getscl(void* data)
{
	struct radeon_i2c_chan 	*chan = data;
	struct radeonfb_info	*rinfo = chan->rinfo;
	u32			val;
	
	val = INREG(chan->ddc_reg);

	return (val & VGA_DDC_CLK_INPUT) ? 1 : 0;
}

static int radeon_gpio_getsda(void* data)
{
	struct radeon_i2c_chan 	*chan = data;
	struct radeonfb_info	*rinfo = chan->rinfo;
	u32			val;
	
	val = INREG(chan->ddc_reg);

	return (val & VGA_DDC_DATA_INPUT) ? 1 : 0;
}

static int radeon_setup_i2c_bus(struct radeon_i2c_chan *chan, const char *name)
{
	int rc;

	strcpy(chan->adapter.name, name);
	chan->adapter.owner		= THIS_MODULE;
	chan->adapter.id		= I2C_HW_B_RADEON;
	chan->adapter.algo_data		= &chan->algo;
	chan->adapter.dev.parent	= &chan->rinfo->pdev->dev;
	chan->algo.setsda		= radeon_gpio_setsda;
	chan->algo.setscl		= radeon_gpio_setscl;
	chan->algo.getsda		= radeon_gpio_getsda;
	chan->algo.getscl		= radeon_gpio_getscl;
	chan->algo.udelay		= 40;
	chan->algo.timeout		= 20;
	chan->algo.data 		= chan;	
	
	i2c_set_adapdata(&chan->adapter, chan);
	
	/* Raise SCL and SDA */
	radeon_gpio_setsda(chan, 1);
	radeon_gpio_setscl(chan, 1);
	udelay(20);

	rc = i2c_bit_add_bus(&chan->adapter);
	if (rc == 0)
		dev_dbg(&chan->rinfo->pdev->dev, "I2C bus %s registered.\n", name);
	else
		dev_warn(&chan->rinfo->pdev->dev, "Failed to register I2C bus %s.\n", name);
	return rc;
}

void radeon_create_i2c_busses(struct radeonfb_info *rinfo)
{
	rinfo->i2c[0].rinfo	= rinfo;
	rinfo->i2c[0].ddc_reg	= GPIO_MONID;
	radeon_setup_i2c_bus(&rinfo->i2c[0], "monid");

	rinfo->i2c[1].rinfo	= rinfo;
	rinfo->i2c[1].ddc_reg	= GPIO_DVI_DDC;
	radeon_setup_i2c_bus(&rinfo->i2c[1], "dvi");

	rinfo->i2c[2].rinfo	= rinfo;
	rinfo->i2c[2].ddc_reg	= GPIO_VGA_DDC;
	radeon_setup_i2c_bus(&rinfo->i2c[2], "vga");

	rinfo->i2c[3].rinfo	= rinfo;
	rinfo->i2c[3].ddc_reg	= GPIO_CRT2_DDC;
	radeon_setup_i2c_bus(&rinfo->i2c[3], "crt2");
}

void radeon_delete_i2c_busses(struct radeonfb_info *rinfo)
{
	if (rinfo->i2c[0].rinfo)
		i2c_bit_del_bus(&rinfo->i2c[0].adapter);
	rinfo->i2c[0].rinfo = NULL;

	if (rinfo->i2c[1].rinfo)
		i2c_bit_del_bus(&rinfo->i2c[1].adapter);
	rinfo->i2c[1].rinfo = NULL;

	if (rinfo->i2c[2].rinfo)
		i2c_bit_del_bus(&rinfo->i2c[2].adapter);
	rinfo->i2c[2].rinfo = NULL;

	if (rinfo->i2c[3].rinfo)
		i2c_bit_del_bus(&rinfo->i2c[3].adapter);
	rinfo->i2c[3].rinfo = NULL;
}

int radeon_probe_i2c_connector(struct radeonfb_info *rinfo, int conn,
			       u8 **out_edid)
{
	u32 reg = rinfo->i2c[conn-1].ddc_reg;
	u8 *edid;

	OUTREG(reg, INREG(reg) &
			~(VGA_DDC_DATA_OUTPUT | VGA_DDC_CLK_OUTPUT));

	edid = fb_ddc_read(&rinfo->i2c[conn-1].adapter);

	if (out_edid)
		*out_edid = edid;
	if (!edid) {
		RTRACE("radeonfb: I2C (port %d) ... not found\n", conn);
		return MT_NONE;
	}
	if (edid[0x14] & 0x80) {
		/* Fix detection using BIOS tables */
		if (rinfo->is_mobility /*&& conn == ddc_dvi*/ &&
		    (INREG(LVDS_GEN_CNTL) & LVDS_ON)) {
			RTRACE("radeonfb: I2C (port %d) ... found LVDS panel\n", conn);
			return MT_LCD;
		} else {
			RTRACE("radeonfb: I2C (port %d) ... found TMDS panel\n", conn);
			return MT_DFP;
		}
	}
       	RTRACE("radeonfb: I2C (port %d) ... found CRT display\n", conn);
	return MT_CRT;
}
Commit	Line	Data
1da177e4 LT	1	#include <linux/module.h>
	2	#include <linux/kernel.h>
	3	#include <linux/sched.h>
	4	#include <linux/delay.h>
	5	#include <linux/pci.h>
	6	#include <linux/fb.h>
	7
	8
	9	#include <linux/i2c.h>
	10	#include <linux/i2c-id.h>
	11	#include <linux/i2c-algo-bit.h>
	12
	13	#include <asm/io.h>
	14
	15	#include <video/radeon.h>
	16	#include "radeonfb.h"
	17	#include "../edid.h"
	18
1da177e4 LT	19	static void radeon_gpio_setscl(void* data, int state)
	20	{
	21	struct radeon_i2c_chan *chan = data;
	22	struct radeonfb_info *rinfo = chan->rinfo;
	23	u32 val;
	24
	25	val = INREG(chan->ddc_reg) & ~(VGA_DDC_CLK_OUT_EN);
	26	if (!state)
	27	val \|= VGA_DDC_CLK_OUT_EN;
	28
	29	OUTREG(chan->ddc_reg, val);
	30	(void)INREG(chan->ddc_reg);
	31	}
	32
	33	static void radeon_gpio_setsda(void* data, int state)
	34	{
	35	struct radeon_i2c_chan *chan = data;
	36	struct radeonfb_info *rinfo = chan->rinfo;
	37	u32 val;
	38
	39	val = INREG(chan->ddc_reg) & ~(VGA_DDC_DATA_OUT_EN);
	40	if (!state)
	41	val \|= VGA_DDC_DATA_OUT_EN;
	42
	43	OUTREG(chan->ddc_reg, val);
	44	(void)INREG(chan->ddc_reg);
	45	}
	46
	47	static int radeon_gpio_getscl(void* data)
	48	{
	49	struct radeon_i2c_chan *chan = data;
	50	struct radeonfb_info *rinfo = chan->rinfo;
	51	u32 val;
	52
	53	val = INREG(chan->ddc_reg);
	54
	55	return (val & VGA_DDC_CLK_INPUT) ? 1 : 0;
	56	}
	57
	58	static int radeon_gpio_getsda(void* data)
	59	{
	60	struct radeon_i2c_chan *chan = data;
	61	struct radeonfb_info *rinfo = chan->rinfo;
	62	u32 val;
	63
	64	val = INREG(chan->ddc_reg);
	65
	66	return (val & VGA_DDC_DATA_INPUT) ? 1 : 0;
	67	}
	68
	69	static int radeon_setup_i2c_bus(struct radeon_i2c_chan chan, const char name)
	70	{
	71	int rc;
	72
	73	strcpy(chan->adapter.name, name);
	74	chan->adapter.owner = THIS_MODULE;
1684a984	75	chan->adapter.id = I2C_HW_B_RADEON;
1da177e4 LT	76	chan->adapter.algo_data = &chan->algo;
	77	chan->adapter.dev.parent = &chan->rinfo->pdev->dev;
	78	chan->algo.setsda = radeon_gpio_setsda;
	79	chan->algo.setscl = radeon_gpio_setscl;
	80	chan->algo.getsda = radeon_gpio_getsda;
	81	chan->algo.getscl = radeon_gpio_getscl;
	82	chan->algo.udelay = 40;
	83	chan->algo.timeout = 20;
	84	chan->algo.data = chan;
	85
	86	i2c_set_adapdata(&chan->adapter, chan);
	87
	88	/* Raise SCL and SDA */
	89	radeon_gpio_setsda(chan, 1);
	90	radeon_gpio_setscl(chan, 1);
	91	udelay(20);
	92
	93	rc = i2c_bit_add_bus(&chan->adapter);
	94	if (rc == 0)
	95	dev_dbg(&chan->rinfo->pdev->dev, "I2C bus %s registered.\n", name);
	96	else
	97	dev_warn(&chan->rinfo->pdev->dev, "Failed to register I2C bus %s.\n", name);
	98	return rc;
	99	}
	100
	101	void radeon_create_i2c_busses(struct radeonfb_info *rinfo)
	102	{
	103	rinfo->i2c[0].rinfo = rinfo;
	104	rinfo->i2c[0].ddc_reg = GPIO_MONID;
	105	radeon_setup_i2c_bus(&rinfo->i2c[0], "monid");
	106
	107	rinfo->i2c[1].rinfo = rinfo;
	108	rinfo->i2c[1].ddc_reg = GPIO_DVI_DDC;
	109	radeon_setup_i2c_bus(&rinfo->i2c[1], "dvi");
	110
	111	rinfo->i2c[2].rinfo = rinfo;
	112	rinfo->i2c[2].ddc_reg = GPIO_VGA_DDC;
	113	radeon_setup_i2c_bus(&rinfo->i2c[2], "vga");
	114
	115	rinfo->i2c[3].rinfo = rinfo;
	116	rinfo->i2c[3].ddc_reg = GPIO_CRT2_DDC;
	117	radeon_setup_i2c_bus(&rinfo->i2c[3], "crt2");
	118	}
	119
	120	void radeon_delete_i2c_busses(struct radeonfb_info *rinfo)
	121	{
	122	if (rinfo->i2c[0].rinfo)
	123	i2c_bit_del_bus(&rinfo->i2c[0].adapter);
	124	rinfo->i2c[0].rinfo = NULL;
	125
	126	if (rinfo->i2c[1].rinfo)
	127	i2c_bit_del_bus(&rinfo->i2c[1].adapter);
	128	rinfo->i2c[1].rinfo = NULL;
	129
	130	if (rinfo->i2c[2].rinfo)
	131	i2c_bit_del_bus(&rinfo->i2c[2].adapter);
	132	rinfo->i2c[2].rinfo = NULL;
	133
	134	if (rinfo->i2c[3].rinfo)
	135	i2c_bit_del_bus(&rinfo->i2c[3].adapter);
	136	rinfo->i2c[3].rinfo = NULL;
	137	}
	138
7a45093b DM	139	int radeon_probe_i2c_connector(struct radeonfb_info *rinfo, int conn,
7a45093b DM	140	u8 **out_edid)
1da177e4	141	{
4f71c5de BH	142	u32 reg = rinfo->i2c[conn-1].ddc_reg;
	143	u8 *edid;
	144
	145	OUTREG(reg, INREG(reg) &
	146	~(VGA_DDC_DATA_OUTPUT \| VGA_DDC_CLK_OUTPUT));
	147
	148	edid = fb_ddc_read(&rinfo->i2c[conn-1].adapter);
1da177e4 LT	149
	150	if (out_edid)
	151	*out_edid = edid;
	152	if (!edid) {
	153	RTRACE("radeonfb: I2C (port %d) ... not found\n", conn);
	154	return MT_NONE;
	155	}
	156	if (edid[0x14] & 0x80) {
	157	/* Fix detection using BIOS tables */
	158	if (rinfo->is_mobility /&& conn == ddc_dvi/ &&
	159	(INREG(LVDS_GEN_CNTL) & LVDS_ON)) {
	160	RTRACE("radeonfb: I2C (port %d) ... found LVDS panel\n", conn);
	161	return MT_LCD;
	162	} else {
	163	RTRACE("radeonfb: I2C (port %d) ... found TMDS panel\n", conn);
	164	return MT_DFP;
	165	}
	166	}
	167	RTRACE("radeonfb: I2C (port %d) ... found CRT display\n", conn);
	168	return MT_CRT;
	169	}
	170