[deliverable/linux.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_save_rec {
	uint8_t reg8;
	uint8_t reg9;
	uint8_t regc;
};

struct sil164_priv {
	//I2CDevRec d;
	bool quiet;
	struct sil164_save_rec save_regs;
	struct sil164_save_rec mode_regs;
};

#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 intel_i2c_chan *i2cbus = dvo->i2c_bus;
	u8 out_buf[2];
	u8 in_buf[2];

	struct i2c_msg msgs[] = {
		{
			.addr = i2cbus->slave_addr,
			.flags = 0,
			.len = 1,
			.buf = out_buf,
		},
		{
			.addr = i2cbus->slave_addr,
			.flags = I2C_M_RD,
			.len = 1,
			.buf = in_buf,
		}
	};

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

	if (i2c_transfer(&i2cbus->adapter, msgs, 2) == 2) {
		*ch = in_buf[0];
		return true;
	};

	if (!sil->quiet) {
		DRM_DEBUG("Unable to read register 0x%02x from %s:%02x.\n",
			  addr, i2cbus->adapter.name, i2cbus->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 intel_i2c_chan *i2cbus = dvo->i2c_bus;
	uint8_t out_buf[2];
	struct i2c_msg msg = {
		.addr = i2cbus->slave_addr,
		.flags = 0,
		.len = 2,
		.buf = out_buf,
	};

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

	if (i2c_transfer(&i2cbus->adapter, &msg, 1) == 1)
		return true;

	if (!sil->quiet) {
		DRM_DEBUG("Unable to write register 0x%02x to %s:%d.\n",
			  addr, i2cbus->adapter.name, i2cbus->slave_addr);
	}

	return false;
}

/* Silicon Image 164 driver for chip on i2c bus */
static bool sil164_init(struct intel_dvo_device *dvo,
			struct intel_i2c_chan *i2cbus)
{
	/* 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 = i2cbus;
	dvo->i2c_bus->slave_addr = dvo->slave_addr;
	dvo->dev_priv = sil;
	sil->quiet = true;

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

	if (ch != (SIL164_VID & 0xff)) {
		DRM_DEBUG("sil164 not detected got %d: from %s Slave %d.\n",
			  ch, i2cbus->adapter.name, i2cbus->slave_addr);
		goto out;
	}

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

	if (ch != (SIL164_DID & 0xff)) {
		DRM_DEBUG("sil164 not detected got %d: from %s Slave %d.\n",
			  ch, i2cbus->adapter.name, i2cbus->slave_addr);
		goto out;
	}
	sil->quiet = false;

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

static void sil164_save(struct intel_dvo_device *dvo)
{
	struct sil164_priv *sil= dvo->dev_priv;

	if (!sil164_readb(dvo, SIL164_REG8, &sil->save_regs.reg8))
		return;

	if (!sil164_readb(dvo, SIL164_REG9, &sil->save_regs.reg9))
		return;

	if (!sil164_readb(dvo, SIL164_REGC, &sil->save_regs.regc))
		return;

	return;
}

static void sil164_restore(struct intel_dvo_device *dvo)
{
	struct sil164_priv *sil = dvo->dev_priv;

	/* Restore it powered down initially */
	sil164_writeb(dvo, SIL164_REG8, sil->save_regs.reg8 & ~0x1);

	sil164_writeb(dvo, SIL164_REG9, sil->save_regs.reg9);
	sil164_writeb(dvo, SIL164_REGC, sil->save_regs.regc);
	sil164_writeb(dvo, SIL164_REG8, sil->save_regs.reg8);
}

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,
	.save = sil164_save,
	.restore = sil164_restore,
	.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
	61	struct sil164_save_rec {
	62	uint8_t reg8;
	63	uint8_t reg9;
	64	uint8_t regc;
65	};
66
67	struct sil164_priv {
68	//I2CDevRec d;
69	bool quiet;
70	struct sil164_save_rec save_regs;
71	struct sil164_save_rec mode_regs;
72	};
73
74	#define SILPTR(d) ((SIL164Ptr)(d->DriverPrivate.ptr))
75
76	static bool sil164_readb(struct intel_dvo_device dvo, int addr, uint8_t ch)
77	{
78	struct sil164_priv *sil = dvo->dev_priv;
79	struct intel_i2c_chan *i2cbus = dvo->i2c_bus;
80	u8 out_buf[2];
81	u8 in_buf[2];
82
83	struct i2c_msg msgs[] = {
84	{
85	.addr = i2cbus->slave_addr,
86	.flags = 0,
87	.len = 1,
88	.buf = out_buf,
89	},
90	{
91	.addr = i2cbus->slave_addr,
92	.flags = I2C_M_RD,
93	.len = 1,
94	.buf = in_buf,
95	}
96	};
97
98	out_buf[0] = addr;
99	out_buf[1] = 0;
100
101	if (i2c_transfer(&i2cbus->adapter, msgs, 2) == 2) {
102	*ch = in_buf[0];
103	return true;
104	};
105
106	if (!sil->quiet) {
107	DRM_DEBUG("Unable to read register 0x%02x from %s:%02x.\n",
108	addr, i2cbus->adapter.name, i2cbus->slave_addr);
109	}
110	return false;
111	}
112
113	static bool sil164_writeb(struct intel_dvo_device *dvo, int addr, uint8_t ch)
114	{
115	struct sil164_priv *sil= dvo->dev_priv;
116	struct intel_i2c_chan *i2cbus = dvo->i2c_bus;
117	uint8_t out_buf[2];
118	struct i2c_msg msg = {
119	.addr = i2cbus->slave_addr,
120	.flags = 0,
121	.len = 2,
122	.buf = out_buf,
123	};
124
125	out_buf[0] = addr;
126	out_buf[1] = ch;
127
128	if (i2c_transfer(&i2cbus->adapter, &msg, 1) == 1)
129	return true;
130
131	if (!sil->quiet) {
132	DRM_DEBUG("Unable to write register 0x%02x to %s:%d.\n",
133	addr, i2cbus->adapter.name, i2cbus->slave_addr);
134	}
135
136	return false;
137	}
138
139	/* Silicon Image 164 driver for chip on i2c bus */
140	static bool sil164_init(struct intel_dvo_device *dvo,
141	struct intel_i2c_chan *i2cbus)
142	{
143	/* this will detect the SIL164 chip on the specified i2c bus */
144	struct sil164_priv *sil;
145	unsigned char ch;
146
147	sil = kzalloc(sizeof(struct sil164_priv), GFP_KERNEL);
148	if (sil == NULL)
149	return false;
150
151	dvo->i2c_bus = i2cbus;
152	dvo->i2c_bus->slave_addr = dvo->slave_addr;
153	dvo->dev_priv = sil;
154	sil->quiet = true;
155
156	if (!sil164_readb(dvo, SIL164_VID_LO, &ch))
157	goto out;
158
159	if (ch != (SIL164_VID & 0xff)) {
160	DRM_DEBUG("sil164 not detected got %d: from %s Slave %d.\n",
161	ch, i2cbus->adapter.name, i2cbus->slave_addr);
162	goto out;
163	}
164
165	if (!sil164_readb(dvo, SIL164_DID_LO, &ch))
166	goto out;
167
168	if (ch != (SIL164_DID & 0xff)) {
169	DRM_DEBUG("sil164 not detected got %d: from %s Slave %d.\n",
170	ch, i2cbus->adapter.name, i2cbus->slave_addr);
171	goto out;
172	}
173	sil->quiet = false;
174
175	DRM_DEBUG("init sil164 dvo controller successfully!\n");
176	return true;
177
178	out:
179	kfree(sil);
180	return false;
181	}
182
183	static enum drm_connector_status sil164_detect(struct intel_dvo_device *dvo)
184	{
185	uint8_t reg9;
186
187	sil164_readb(dvo, SIL164_REG9, &reg9);
188
189	if (reg9 & SIL164_9_HTPLG)
190	return connector_status_connected;
191	else
192	return connector_status_disconnected;
193	}
194
195	static enum drm_mode_status sil164_mode_valid(struct intel_dvo_device *dvo,
196	struct drm_display_mode *mode)
197	{
198	return MODE_OK;
199	}
200
201	static void sil164_mode_set(struct intel_dvo_device *dvo,
202	struct drm_display_mode *mode,
203	struct drm_display_mode *adjusted_mode)
204	{
205	/* As long as the basics are set up, since we don't have clock
206	* dependencies in the mode setup, we can just leave the
207	* registers alone and everything will work fine.
208	*/
209	/* recommended programming sequence from doc */
210	/*sil164_writeb(sil, 0x08, 0x30);
211	sil164_writeb(sil, 0x09, 0x00);
212	sil164_writeb(sil, 0x0a, 0x90);
213	sil164_writeb(sil, 0x0c, 0x89);
214	sil164_writeb(sil, 0x08, 0x31);*/
215	/* don't do much */
216	return;
217	}
218
219	/* set the SIL164 power state */
220	static void sil164_dpms(struct intel_dvo_device *dvo, int mode)
221	{
222	int ret;
223	unsigned char ch;
224
225	ret = sil164_readb(dvo, SIL164_REG8, &ch);
226	if (ret == false)
227	return;
228
229	if (mode == DRM_MODE_DPMS_ON)
230	ch \|= SIL164_8_PD;
231	else
232	ch &= ~SIL164_8_PD;
233
234	sil164_writeb(dvo, SIL164_REG8, ch);
235	return;
236	}
237
238	static void sil164_dump_regs(struct intel_dvo_device *dvo)
239	{
240	uint8_t val;
241
242	sil164_readb(dvo, SIL164_FREQ_LO, &val);
243	DRM_DEBUG("SIL164_FREQ_LO: 0x%02x\n", val);
244	sil164_readb(dvo, SIL164_FREQ_HI, &val);
245	DRM_DEBUG("SIL164_FREQ_HI: 0x%02x\n", val);
246	sil164_readb(dvo, SIL164_REG8, &val);
247	DRM_DEBUG("SIL164_REG8: 0x%02x\n", val);
248	sil164_readb(dvo, SIL164_REG9, &val);
249	DRM_DEBUG("SIL164_REG9: 0x%02x\n", val);
250	sil164_readb(dvo, SIL164_REGC, &val);
251	DRM_DEBUG("SIL164_REGC: 0x%02x\n", val);
252	}
253
254	static void sil164_save(struct intel_dvo_device *dvo)
255	{
256	struct sil164_priv *sil= dvo->dev_priv;
257
258	if (!sil164_readb(dvo, SIL164_REG8, &sil->save_regs.reg8))
259	return;
260
261	if (!sil164_readb(dvo, SIL164_REG9, &sil->save_regs.reg9))
262	return;
263
264	if (!sil164_readb(dvo, SIL164_REGC, &sil->save_regs.regc))
265	return;
266
267	return;
268	}
269
270	static void sil164_restore(struct intel_dvo_device *dvo)
271	{
272	struct sil164_priv *sil = dvo->dev_priv;
273
274	/* Restore it powered down initially */
275	sil164_writeb(dvo, SIL164_REG8, sil->save_regs.reg8 & ~0x1);
276
277	sil164_writeb(dvo, SIL164_REG9, sil->save_regs.reg9);
278	sil164_writeb(dvo, SIL164_REGC, sil->save_regs.regc);
279	sil164_writeb(dvo, SIL164_REG8, sil->save_regs.reg8);
280	}
281
282	static void sil164_destroy(struct intel_dvo_device *dvo)
283	{
284	struct sil164_priv *sil = dvo->dev_priv;
285
286	if (sil) {
287	kfree(sil);
288	dvo->dev_priv = NULL;
289	}
290	}
291
292	struct intel_dvo_dev_ops sil164_ops = {
293	.init = sil164_init,
294	.detect = sil164_detect,
295	.mode_valid = sil164_mode_valid,
296	.mode_set = sil164_mode_set,
297	.dpms = sil164_dpms,
298	.dump_regs = sil164_dump_regs,
299	.save = sil164_save,
300	.restore = sil164_restore,
301	.destroy = sil164_destroy,
302	};