1/**************************************************************************
2
3Copyright �� 2006 Dave Airlie
4
5All Rights Reserved.
6
7Permission is hereby granted, free of charge, to any person obtaining a
8copy of this software and associated documentation files (the
9"Software"), to deal in the Software without restriction, including
10without limitation the rights to use, copy, modify, merge, publish,
11distribute, sub license, and/or sell copies of the Software, and to
12permit persons to whom the Software is furnished to do so, subject to
13the following conditions:
14
15The above copyright notice and this permission notice (including the
16next paragraph) shall be included in all copies or substantial portions
17of the Software.
18
19THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
23ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26
27**************************************************************************/
28
29#include "intel_display_types.h"
30#include "intel_dvo_dev.h"
31
32#define SIL164_VID 0x0001
33#define SIL164_DID 0x0006
34
35#define SIL164_VID_LO 0x00
36#define SIL164_VID_HI 0x01
37#define SIL164_DID_LO 0x02
38#define SIL164_DID_HI 0x03
39#define SIL164_REV    0x04
40#define SIL164_RSVD   0x05
41#define SIL164_FREQ_LO 0x06
42#define SIL164_FREQ_HI 0x07
43
44#define SIL164_REG8 0x08
45#define SIL164_8_VEN (1<<5)
46#define SIL164_8_HEN (1<<4)
47#define SIL164_8_DSEL (1<<3)
48#define SIL164_8_BSEL (1<<2)
49#define SIL164_8_EDGE (1<<1)
50#define SIL164_8_PD   (1<<0)
51
52#define SIL164_REG9 0x09
53#define SIL164_9_VLOW (1<<7)
54#define SIL164_9_MSEL_MASK (0x7<<4)
55#define SIL164_9_TSEL (1<<3)
56#define SIL164_9_RSEN (1<<2)
57#define SIL164_9_HTPLG (1<<1)
58#define SIL164_9_MDI (1<<0)
59
60#define SIL164_REGC 0x0c
61#define SIL164_C_SCNT (1<<7)
62#define SIL164_C_PLLF_MASK (0xf<<1)
63#define SIL164_C_PLLF_REC (4<<1)
64#define SIL164_C_PFEN (1<<0)
65
66struct sil164_priv {
67	//I2CDevRec d;
68	bool quiet;
69};
70
71#define SILPTR(d) ((SIL164Ptr)(d->DriverPrivate.ptr))
72
73static bool sil164_readb(struct intel_dvo_device *dvo, int addr, u8 *ch)
74{
75	struct sil164_priv *sil = dvo->dev_priv;
76	struct i2c_adapter *adapter = dvo->i2c_bus;
77	u8 out_buf[2];
78	u8 in_buf[2];
79
80	struct i2c_msg msgs[] = {
81		{
82			.addr = dvo->slave_addr,
83			.flags = 0,
84			.len = 1,
85			.buf = out_buf,
86		},
87		{
88			.addr = dvo->slave_addr,
89			.flags = I2C_M_RD,
90			.len = 1,
91			.buf = in_buf,
92		}
93	};
94
95	out_buf[0] = addr;
96	out_buf[1] = 0;
97
98	if (i2c_transfer(adapter, msgs, 2) == 2) {
99		*ch = in_buf[0];
100		return true;
101	}
102
103	if (!sil->quiet) {
104		DRM_DEBUG_KMS("Unable to read register 0x%02x from %s:%02x.\n",
105			  addr, adapter->name, dvo->slave_addr);
106	}
107	return false;
108}
109
110static bool sil164_writeb(struct intel_dvo_device *dvo, int addr, u8 ch)
111{
112	struct sil164_priv *sil = dvo->dev_priv;
113	struct i2c_adapter *adapter = dvo->i2c_bus;
114	u8 out_buf[2];
115	struct i2c_msg msg = {
116		.addr = dvo->slave_addr,
117		.flags = 0,
118		.len = 2,
119		.buf = out_buf,
120	};
121
122	out_buf[0] = addr;
123	out_buf[1] = ch;
124
125	if (i2c_transfer(adapter, &msg, 1) == 1)
126		return true;
127
128	if (!sil->quiet) {
129		DRM_DEBUG_KMS("Unable to write register 0x%02x to %s:%d.\n",
130			  addr, adapter->name, dvo->slave_addr);
131	}
132
133	return false;
134}
135
136/* Silicon Image 164 driver for chip on i2c bus */
137static bool sil164_init(struct intel_dvo_device *dvo,
138			struct i2c_adapter *adapter)
139{
140	/* this will detect the SIL164 chip on the specified i2c bus */
141	struct sil164_priv *sil;
142	unsigned char ch;
143
144	sil = kzalloc(sizeof(*sil), GFP_KERNEL);
145	if (sil == NULL)
146		return false;
147
148	dvo->i2c_bus = adapter;
149	dvo->dev_priv = sil;
150	sil->quiet = true;
151
152	if (!sil164_readb(dvo, SIL164_VID_LO, &ch))
153		goto out;
154
155	if (ch != (SIL164_VID & 0xff)) {
156		DRM_DEBUG_KMS("sil164 not detected got %d: from %s Slave %d.\n",
157			  ch, adapter->name, dvo->slave_addr);
158		goto out;
159	}
160
161	if (!sil164_readb(dvo, SIL164_DID_LO, &ch))
162		goto out;
163
164	if (ch != (SIL164_DID & 0xff)) {
165		DRM_DEBUG_KMS("sil164 not detected got %d: from %s Slave %d.\n",
166			  ch, adapter->name, dvo->slave_addr);
167		goto out;
168	}
169	sil->quiet = false;
170
171	DRM_DEBUG_KMS("init sil164 dvo controller successfully!\n");
172	return true;
173
174out:
175	kfree(sil);
176	return false;
177}
178
179static enum drm_connector_status sil164_detect(struct intel_dvo_device *dvo)
180{
181	u8 reg9;
182
183	sil164_readb(dvo, SIL164_REG9, &reg9);
184
185	if (reg9 & SIL164_9_HTPLG)
186		return connector_status_connected;
187	else
188		return connector_status_disconnected;
189}
190
191static enum drm_mode_status sil164_mode_valid(struct intel_dvo_device *dvo,
192					      struct drm_display_mode *mode)
193{
194	return MODE_OK;
195}
196
197static void sil164_mode_set(struct intel_dvo_device *dvo,
198			    const struct drm_display_mode *mode,
199			    const struct drm_display_mode *adjusted_mode)
200{
201	/* As long as the basics are set up, since we don't have clock
202	 * dependencies in the mode setup, we can just leave the
203	 * registers alone and everything will work fine.
204	 */
205	/* recommended programming sequence from doc */
206	/*sil164_writeb(sil, 0x08, 0x30);
207	  sil164_writeb(sil, 0x09, 0x00);
208	  sil164_writeb(sil, 0x0a, 0x90);
209	  sil164_writeb(sil, 0x0c, 0x89);
210	  sil164_writeb(sil, 0x08, 0x31);*/
211	/* don't do much */
212
213	sil164_writeb(dvo, SIL164_REG8,
214		      SIL164_8_VEN | SIL164_8_HEN);
215	sil164_writeb(dvo, SIL164_REG9,
216		      SIL164_9_TSEL);
217	sil164_writeb(dvo, SIL164_REGC,
218		      SIL164_C_PLLF_REC | SIL164_C_PFEN);
219}
220
221/* set the SIL164 power state */
222static void sil164_dpms(struct intel_dvo_device *dvo, bool enable)
223{
224	int ret;
225	unsigned char ch;
226
227	ret = sil164_readb(dvo, SIL164_REG8, &ch);
228	if (ret == false)
229		return;
230
231	if (enable)
232		ch |= SIL164_8_PD;
233	else
234		ch &= ~SIL164_8_PD;
235
236	sil164_writeb(dvo, SIL164_REG8, ch);
237}
238
239static bool sil164_get_hw_state(struct intel_dvo_device *dvo)
240{
241	int ret;
242	unsigned char ch;
243
244	ret = sil164_readb(dvo, SIL164_REG8, &ch);
245	if (ret == false)
246		return false;
247
248	if (ch & SIL164_8_PD)
249		return true;
250	else
251		return false;
252}
253
254static void sil164_dump_regs(struct intel_dvo_device *dvo)
255{
256	u8 val;
257
258	sil164_readb(dvo, SIL164_FREQ_LO, &val);
259	DRM_DEBUG_KMS("SIL164_FREQ_LO: 0x%02x\n", val);
260	sil164_readb(dvo, SIL164_FREQ_HI, &val);
261	DRM_DEBUG_KMS("SIL164_FREQ_HI: 0x%02x\n", val);
262	sil164_readb(dvo, SIL164_REG8, &val);
263	DRM_DEBUG_KMS("SIL164_REG8: 0x%02x\n", val);
264	sil164_readb(dvo, SIL164_REG9, &val);
265	DRM_DEBUG_KMS("SIL164_REG9: 0x%02x\n", val);
266	sil164_readb(dvo, SIL164_REGC, &val);
267	DRM_DEBUG_KMS("SIL164_REGC: 0x%02x\n", val);
268}
269
270static void sil164_destroy(struct intel_dvo_device *dvo)
271{
272	struct sil164_priv *sil = dvo->dev_priv;
273
274	if (sil) {
275		kfree(sil);
276		dvo->dev_priv = NULL;
277	}
278}
279
280const struct intel_dvo_dev_ops sil164_ops = {
281	.init = sil164_init,
282	.detect = sil164_detect,
283	.mode_valid = sil164_mode_valid,
284	.mode_set = sil164_mode_set,
285	.dpms = sil164_dpms,
286	.get_hw_state = sil164_get_hw_state,
287	.dump_regs = sil164_dump_regs,
288	.destroy = sil164_destroy,
289};
290