[net-next-2.6.git] / drivers / gpu / drm / i915 / dvo_sil164.c

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

Copyright © 2006 Dave Airlie

All Rights Reserved.

Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sub license, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice (including the
next paragraph) shall be included in all copies or substantial portions
of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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

#include "dvo.h"

#define SIL164_VID 0x0001
#define SIL164_DID 0x0006

#define SIL164_VID_LO 0x00
#define SIL164_VID_HI 0x01
#define SIL164_DID_LO 0x02
#define SIL164_DID_HI 0x03
#define SIL164_REV    0x04
#define SIL164_RSVD   0x05
#define SIL164_FREQ_LO 0x06
#define SIL164_FREQ_HI 0x07

#define SIL164_REG8 0x08
#define SIL164_8_VEN (1<<5)
#define SIL164_8_HEN (1<<4)
#define SIL164_8_DSEL (1<<3)
#define SIL164_8_BSEL (1<<2)
#define SIL164_8_EDGE (1<<1)
#define SIL164_8_PD   (1<<0)

#define SIL164_REG9 0x09
#define SIL164_9_VLOW (1<<7)
#define SIL164_9_MSEL_MASK (0x7<<4)
#define SIL164_9_TSEL (1<<3)
#define SIL164_9_RSEN (1<<2)
#define SIL164_9_HTPLG (1<<1)
#define SIL164_9_MDI (1<<0)

#define SIL164_REGC 0x0c

struct sil164_priv {
	//I2CDevRec d;
	bool quiet;
};

#define SILPTR(d) ((SIL164Ptr)(d->DriverPrivate.ptr))

static bool sil164_readb(struct intel_dvo_device *dvo, int addr, uint8_t *ch)
{
	struct sil164_priv *sil = dvo->dev_priv;
	struct i2c_adapter *adapter = dvo->i2c_bus;
	u8 out_buf[2];
	u8 in_buf[2];

	struct i2c_msg msgs[] = {
		{
			.addr = dvo->slave_addr,
			.flags = 0,
			.len = 1,
			.buf = out_buf,
		},
		{
			.addr = dvo->slave_addr,
			.flags = I2C_M_RD,
			.len = 1,
			.buf = in_buf,
		}
	};

	out_buf[0] = addr;
	out_buf[1] = 0;

	if (i2c_transfer(adapter, msgs, 2) == 2) {
		*ch = in_buf[0];
		return true;
	};

	if (!sil->quiet) {
		DRM_DEBUG_KMS("Unable to read register 0x%02x from %s:%02x.\n",
			  addr, adapter->name, dvo->slave_addr);
	}
	return false;
}

static bool sil164_writeb(struct intel_dvo_device *dvo, int addr, uint8_t ch)
{
	struct sil164_priv *sil= dvo->dev_priv;
	struct i2c_adapter *adapter = dvo->i2c_bus;
	uint8_t out_buf[2];
	struct i2c_msg msg = {
		.addr = dvo->slave_addr,
		.flags = 0,
		.len = 2,
		.buf = out_buf,
	};

	out_buf[0] = addr;
	out_buf[1] = ch;

	if (i2c_transfer(adapter, &msg, 1) == 1)
		return true;

	if (!sil->quiet) {
		DRM_DEBUG_KMS("Unable to write register 0x%02x to %s:%d.\n",
			  addr, adapter->name, dvo->slave_addr);
	}

	return false;
}

/* Silicon Image 164 driver for chip on i2c bus */
static bool sil164_init(struct intel_dvo_device *dvo,
			struct i2c_adapter *adapter)
{
	/* this will detect the SIL164 chip on the specified i2c bus */
	struct sil164_priv *sil;
	unsigned char ch;

	sil = kzalloc(sizeof(struct sil164_priv), GFP_KERNEL);
	if (sil == NULL)
		return false;

	dvo->i2c_bus = adapter;
	dvo->dev_priv = sil;
	sil->quiet = true;

	if (!sil164_readb(dvo, SIL164_VID_LO, &ch))
		goto out;

	if (ch != (SIL164_VID & 0xff)) {
		DRM_DEBUG_KMS("sil164 not detected got %d: from %s Slave %d.\n",
			  ch, adapter->name, dvo->slave_addr);
		goto out;
	}

	if (!sil164_readb(dvo, SIL164_DID_LO, &ch))
		goto out;

	if (ch != (SIL164_DID & 0xff)) {
		DRM_DEBUG_KMS("sil164 not detected got %d: from %s Slave %d.\n",
			  ch, adapter->name, dvo->slave_addr);
		goto out;
	}
	sil->quiet = false;

	DRM_DEBUG_KMS("init sil164 dvo controller successfully!\n");
	return true;

out:
	kfree(sil);
	return false;
}

static enum drm_connector_status sil164_detect(struct intel_dvo_device *dvo)
{
	uint8_t reg9;

	sil164_readb(dvo, SIL164_REG9, &reg9);

	if (reg9 & SIL164_9_HTPLG)
		return connector_status_connected;
	else
		return connector_status_disconnected;
}

static enum drm_mode_status sil164_mode_valid(struct intel_dvo_device *dvo,
					      struct drm_display_mode *mode)
{
	return MODE_OK;
}

static void sil164_mode_set(struct intel_dvo_device *dvo,
			    struct drm_display_mode *mode,
			    struct drm_display_mode *adjusted_mode)
{
	/* As long as the basics are set up, since we don't have clock
	 * dependencies in the mode setup, we can just leave the
	 * registers alone and everything will work fine.
	 */
	/* recommended programming sequence from doc */
	/*sil164_writeb(sil, 0x08, 0x30);
	  sil164_writeb(sil, 0x09, 0x00);
	  sil164_writeb(sil, 0x0a, 0x90);
	  sil164_writeb(sil, 0x0c, 0x89);
	  sil164_writeb(sil, 0x08, 0x31);*/
	/* don't do much */
	return;
}

/* set the SIL164 power state */
static void sil164_dpms(struct intel_dvo_device *dvo, int mode)
{
	int ret;
	unsigned char ch;

	ret = sil164_readb(dvo, SIL164_REG8, &ch);
	if (ret == false)
		return;

	if (mode == DRM_MODE_DPMS_ON)
		ch |= SIL164_8_PD;
	else
		ch &= ~SIL164_8_PD;

	sil164_writeb(dvo, SIL164_REG8, ch);
	return;
}

static void sil164_dump_regs(struct intel_dvo_device *dvo)
{
	uint8_t val;

	sil164_readb(dvo, SIL164_FREQ_LO, &val);
	DRM_LOG_KMS("SIL164_FREQ_LO: 0x%02x\n", val);
	sil164_readb(dvo, SIL164_FREQ_HI, &val);
	DRM_LOG_KMS("SIL164_FREQ_HI: 0x%02x\n", val);
	sil164_readb(dvo, SIL164_REG8, &val);
	DRM_LOG_KMS("SIL164_REG8: 0x%02x\n", val);
	sil164_readb(dvo, SIL164_REG9, &val);
	DRM_LOG_KMS("SIL164_REG9: 0x%02x\n", val);
	sil164_readb(dvo, SIL164_REGC, &val);
	DRM_LOG_KMS("SIL164_REGC: 0x%02x\n", val);
}

static void sil164_destroy(struct intel_dvo_device *dvo)
{
	struct sil164_priv *sil = dvo->dev_priv;

	if (sil) {
		kfree(sil);
		dvo->dev_priv = NULL;
	}
}

struct intel_dvo_dev_ops sil164_ops = {
	.init = sil164_init,
	.detect = sil164_detect,
	.mode_valid = sil164_mode_valid,
	.mode_set = sil164_mode_set,
	.dpms = sil164_dpms,
	.dump_regs = sil164_dump_regs,
	.destroy = sil164_destroy,
};
Commit	Line	Data
79e53945 JB	1	/**************************************************************************
	2
	3	Copyright © 2006 Dave Airlie
	4
	5	All Rights Reserved.
	6
	7	Permission is hereby granted, free of charge, to any person obtaining a
	8	copy of this software and associated documentation files (the
	9	"Software"), to deal in the Software without restriction, including
	10	without limitation the rights to use, copy, modify, merge, publish,
	11	distribute, sub license, and/or sell copies of the Software, and to
	12	permit persons to whom the Software is furnished to do so, subject to
	13	the following conditions:
	14
	15	The above copyright notice and this permission notice (including the
	16	next paragraph) shall be included in all copies or substantial portions
	17	of the Software.
	18
	19	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
	20	OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	21	MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
	22	IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	23	ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
	24	TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
	25	SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
	26
	27	**************************************************************************/
	28
	29	#include "dvo.h"
	30
	31	#define SIL164_VID 0x0001
	32	#define SIL164_DID 0x0006
	33
	34	#define SIL164_VID_LO 0x00
	35	#define SIL164_VID_HI 0x01
	36	#define SIL164_DID_LO 0x02
	37	#define SIL164_DID_HI 0x03
	38	#define SIL164_REV 0x04
	39	#define SIL164_RSVD 0x05
	40	#define SIL164_FREQ_LO 0x06
	41	#define SIL164_FREQ_HI 0x07
	42
	43	#define SIL164_REG8 0x08
	44	#define SIL164_8_VEN (1<<5)
	45	#define SIL164_8_HEN (1<<4)
	46	#define SIL164_8_DSEL (1<<3)
	47	#define SIL164_8_BSEL (1<<2)
	48	#define SIL164_8_EDGE (1<<1)
	49	#define SIL164_8_PD (1<<0)
	50
	51	#define SIL164_REG9 0x09
	52	#define SIL164_9_VLOW (1<<7)
	53	#define SIL164_9_MSEL_MASK (0x7<<4)
	54	#define SIL164_9_TSEL (1<<3)
	55	#define SIL164_9_RSEN (1<<2)
	56	#define SIL164_9_HTPLG (1<<1)
	57	#define SIL164_9_MDI (1<<0)
	58
	59	#define SIL164_REGC 0x0c
	60
79e53945 JB	61	struct sil164_priv {
	62	//I2CDevRec d;
	63	bool quiet;
79e53945 JB	64	};
	65
	66	#define SILPTR(d) ((SIL164Ptr)(d->DriverPrivate.ptr))
	67
	68	static bool sil164_readb(struct intel_dvo_device dvo, int addr, uint8_t ch)
	69	{
	70	struct sil164_priv *sil = dvo->dev_priv;
f9c10a9b	71	struct i2c_adapter *adapter = dvo->i2c_bus;
79e53945 JB	72	u8 out_buf[2];
	73	u8 in_buf[2];
	74
	75	struct i2c_msg msgs[] = {
	76	{
f9c10a9b	77	.addr = dvo->slave_addr,
79e53945 JB	78	.flags = 0,
	79	.len = 1,
	80	.buf = out_buf,
	81	},
	82	{
f9c10a9b	83	.addr = dvo->slave_addr,
79e53945 JB	84	.flags = I2C_M_RD,
	85	.len = 1,
	86	.buf = in_buf,
	87	}
	88	};
	89
	90	out_buf[0] = addr;
	91	out_buf[1] = 0;
	92
f899fc64	93	if (i2c_transfer(adapter, msgs, 2) == 2) {
79e53945 JB	94	*ch = in_buf[0];
	95	return true;
	96	};
	97
	98	if (!sil->quiet) {
d0c3b04a	99	DRM_DEBUG_KMS("Unable to read register 0x%02x from %s:%02x.\n",
f899fc64	100	addr, adapter->name, dvo->slave_addr);
79e53945 JB	101	}
	102	return false;
	103	}
	104
	105	static bool sil164_writeb(struct intel_dvo_device *dvo, int addr, uint8_t ch)
	106	{
	107	struct sil164_priv *sil= dvo->dev_priv;
f9c10a9b	108	struct i2c_adapter *adapter = dvo->i2c_bus;
79e53945 JB	109	uint8_t out_buf[2];
79e53945 JB	110	struct i2c_msg msg = {
f9c10a9b	111	.addr = dvo->slave_addr,
79e53945 JB	112	.flags = 0,
	113	.len = 2,
	114	.buf = out_buf,
	115	};
	116
	117	out_buf[0] = addr;
	118	out_buf[1] = ch;
	119
f899fc64	120	if (i2c_transfer(adapter, &msg, 1) == 1)
79e53945 JB	121	return true;
	122
	123	if (!sil->quiet) {
d0c3b04a	124	DRM_DEBUG_KMS("Unable to write register 0x%02x to %s:%d.\n",
f899fc64	125	addr, adapter->name, dvo->slave_addr);
79e53945 JB	126	}
	127
	128	return false;
	129	}
	130
	131	/* Silicon Image 164 driver for chip on i2c bus */
	132	static bool sil164_init(struct intel_dvo_device *dvo,
f9c10a9b	133	struct i2c_adapter *adapter)
79e53945 JB	134	{
	135	/* this will detect the SIL164 chip on the specified i2c bus */
	136	struct sil164_priv *sil;
	137	unsigned char ch;
	138
	139	sil = kzalloc(sizeof(struct sil164_priv), GFP_KERNEL);
	140	if (sil == NULL)
	141	return false;
	142
f9c10a9b	143	dvo->i2c_bus = adapter;
79e53945 JB	144	dvo->dev_priv = sil;
	145	sil->quiet = true;
	146
	147	if (!sil164_readb(dvo, SIL164_VID_LO, &ch))
	148	goto out;
	149
	150	if (ch != (SIL164_VID & 0xff)) {
d0c3b04a	151	DRM_DEBUG_KMS("sil164 not detected got %d: from %s Slave %d.\n",
f9c10a9b	152	ch, adapter->name, dvo->slave_addr);
79e53945 JB	153	goto out;
	154	}
	155
	156	if (!sil164_readb(dvo, SIL164_DID_LO, &ch))
	157	goto out;
	158
	159	if (ch != (SIL164_DID & 0xff)) {
d0c3b04a	160	DRM_DEBUG_KMS("sil164 not detected got %d: from %s Slave %d.\n",
f9c10a9b	161	ch, adapter->name, dvo->slave_addr);
79e53945 JB	162	goto out;
	163	}
	164	sil->quiet = false;
	165
d0c3b04a	166	DRM_DEBUG_KMS("init sil164 dvo controller successfully!\n");
79e53945 JB	167	return true;
	168
	169	out:
	170	kfree(sil);
	171	return false;
	172	}
	173
	174	static enum drm_connector_status sil164_detect(struct intel_dvo_device *dvo)
	175	{
	176	uint8_t reg9;
	177
	178	sil164_readb(dvo, SIL164_REG9, &reg9);
	179
	180	if (reg9 & SIL164_9_HTPLG)
	181	return connector_status_connected;
	182	else
	183	return connector_status_disconnected;
	184	}
	185
	186	static enum drm_mode_status sil164_mode_valid(struct intel_dvo_device *dvo,
	187	struct drm_display_mode *mode)
	188	{
	189	return MODE_OK;
	190	}
	191
	192	static void sil164_mode_set(struct intel_dvo_device *dvo,
	193	struct drm_display_mode *mode,
	194	struct drm_display_mode *adjusted_mode)
	195	{
	196	/* As long as the basics are set up, since we don't have clock
	197	* dependencies in the mode setup, we can just leave the
	198	* registers alone and everything will work fine.
	199	*/
	200	/* recommended programming sequence from doc */
	201	/*sil164_writeb(sil, 0x08, 0x30);
	202	sil164_writeb(sil, 0x09, 0x00);
	203	sil164_writeb(sil, 0x0a, 0x90);
	204	sil164_writeb(sil, 0x0c, 0x89);
	205	sil164_writeb(sil, 0x08, 0x31);*/
	206	/* don't do much */
	207	return;
	208	}
	209
	210	/* set the SIL164 power state */
	211	static void sil164_dpms(struct intel_dvo_device *dvo, int mode)
	212	{
	213	int ret;
	214	unsigned char ch;
	215
	216	ret = sil164_readb(dvo, SIL164_REG8, &ch);
	217	if (ret == false)
	218	return;
	219
	220	if (mode == DRM_MODE_DPMS_ON)
	221	ch \|= SIL164_8_PD;
	222	else
	223	ch &= ~SIL164_8_PD;
	224
	225	sil164_writeb(dvo, SIL164_REG8, ch);
	226	return;
	227	}
	228
	229	static void sil164_dump_regs(struct intel_dvo_device *dvo)
	230	{
231	uint8_t val;
232
233	sil164_readb(dvo, SIL164_FREQ_LO, &val);
d0c3b04a	234	DRM_LOG_KMS("SIL164_FREQ_LO: 0x%02x\n", val);
79e53945	235	sil164_readb(dvo, SIL164_FREQ_HI, &val);
d0c3b04a	236	DRM_LOG_KMS("SIL164_FREQ_HI: 0x%02x\n", val);
79e53945	237	sil164_readb(dvo, SIL164_REG8, &val);
d0c3b04a	238	DRM_LOG_KMS("SIL164_REG8: 0x%02x\n", val);
79e53945	239	sil164_readb(dvo, SIL164_REG9, &val);
d0c3b04a	240	DRM_LOG_KMS("SIL164_REG9: 0x%02x\n", val);
79e53945	241	sil164_readb(dvo, SIL164_REGC, &val);
d0c3b04a	242	DRM_LOG_KMS("SIL164_REGC: 0x%02x\n", val);
79e53945 JB	243	}
79e53945 JB	244
79e53945 JB	245	static void sil164_destroy(struct intel_dvo_device *dvo)
	246	{
	247	struct sil164_priv *sil = dvo->dev_priv;
	248
	249	if (sil) {
	250	kfree(sil);
	251	dvo->dev_priv = NULL;
	252	}
	253	}
	254
	255	struct intel_dvo_dev_ops sil164_ops = {
	256	.init = sil164_init,
	257	.detect = sil164_detect,
	258	.mode_valid = sil164_mode_valid,
	259	.mode_set = sil164_mode_set,
	260	.dpms = sil164_dpms,
	261	.dump_regs = sil164_dump_regs,
79e53945 JB	262	.destroy = sil164_destroy,
79e53945 JB	263	};