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 "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
61struct sil164_priv {
62	//I2CDevRec d;
63	bool quiet;
64};
65
66#define SILPTR(d) ((SIL164Ptr)(d->DriverPrivate.ptr))
67
68static bool sil164_readb(struct intel_dvo_device *dvo, int addr, uint8_t *ch)
69{
70	struct sil164_priv *sil = dvo->dev_priv;
71	struct i2c_adapter *adapter = dvo->i2c_bus;
72	u8 out_buf[2];
73	u8 in_buf[2];
74
75	struct i2c_msg msgs[] = {
76		{
77			.addr = dvo->slave_addr,
78			.flags = 0,
79			.len = 1,
80			.buf = out_buf,
81		},
82		{
83			.addr = dvo->slave_addr,
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
93	if (i2c_transfer(adapter, msgs, 2) == 2) {
94		*ch = in_buf[0];
95		return true;
96	}
97
98	if (!sil->quiet) {
99		DRM_DEBUG_KMS("Unable to read register 0x%02x from %s:%02x.\n",
100			  addr, adapter->name, dvo->slave_addr);
101	}
102	return false;
103}
104
105static bool sil164_writeb(struct intel_dvo_device *dvo, int addr, uint8_t ch)
106{
107	struct sil164_priv *sil = dvo->dev_priv;
108	struct i2c_adapter *adapter = dvo->i2c_bus;
109	uint8_t out_buf[2];
110	struct i2c_msg msg = {
111		.addr = dvo->slave_addr,
112		.flags = 0,
113		.len = 2,
114		.buf = out_buf,
115	};
116
117	out_buf[0] = addr;
118	out_buf[1] = ch;
119
120	if (i2c_transfer(adapter, &msg, 1) == 1)
121		return true;
122
123	if (!sil->quiet) {
124		DRM_DEBUG_KMS("Unable to write register 0x%02x to %s:%d.\n",
125			  addr, adapter->name, dvo->slave_addr);
126	}
127
128	return false;
129}
130
131/* Silicon Image 164 driver for chip on i2c bus */
132static bool sil164_init(struct intel_dvo_device *dvo,
133			struct i2c_adapter *adapter)
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
143	dvo->i2c_bus = adapter;
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)) {
151		DRM_DEBUG_KMS("sil164 not detected got %d: from %s Slave %d.\n",
152			  ch, adapter->name, dvo->slave_addr);
153		goto out;
154	}
155
156	if (!sil164_readb(dvo, SIL164_DID_LO, &ch))
157		goto out;
158
159	if (ch != (SIL164_DID & 0xff)) {
160		DRM_DEBUG_KMS("sil164 not detected got %d: from %s Slave %d.\n",
161			  ch, adapter->name, dvo->slave_addr);
162		goto out;
163	}
164	sil->quiet = false;
165
166	DRM_DEBUG_KMS("init sil164 dvo controller successfully!\n");
167	return true;
168
169out:
170	kfree(sil);
171	return false;
172}
173
174static 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
186static 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
192static 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 */
211static void sil164_dpms(struct intel_dvo_device *dvo, bool enable)
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 (enable)
221		ch |= SIL164_8_PD;
222	else
223		ch &= ~SIL164_8_PD;
224
225	sil164_writeb(dvo, SIL164_REG8, ch);
226	return;
227}
228
229static bool sil164_get_hw_state(struct intel_dvo_device *dvo)
230{
231	int ret;
232	unsigned char ch;
233
234	ret = sil164_readb(dvo, SIL164_REG8, &ch);
235	if (ret == false)
236		return false;
237
238	if (ch & SIL164_8_PD)
239		return true;
240	else
241		return false;
242}
243
244static void sil164_dump_regs(struct intel_dvo_device *dvo)
245{
246	uint8_t val;
247
248	sil164_readb(dvo, SIL164_FREQ_LO, &val);
249	DRM_DEBUG_KMS("SIL164_FREQ_LO: 0x%02x\n", val);
250	sil164_readb(dvo, SIL164_FREQ_HI, &val);
251	DRM_DEBUG_KMS("SIL164_FREQ_HI: 0x%02x\n", val);
252	sil164_readb(dvo, SIL164_REG8, &val);
253	DRM_DEBUG_KMS("SIL164_REG8: 0x%02x\n", val);
254	sil164_readb(dvo, SIL164_REG9, &val);
255	DRM_DEBUG_KMS("SIL164_REG9: 0x%02x\n", val);
256	sil164_readb(dvo, SIL164_REGC, &val);
257	DRM_DEBUG_KMS("SIL164_REGC: 0x%02x\n", val);
258}
259
260static void sil164_destroy(struct intel_dvo_device *dvo)
261{
262	struct sil164_priv *sil = dvo->dev_priv;
263
264	if (sil) {
265		kfree(sil);
266		dvo->dev_priv = NULL;
267	}
268}
269
270struct intel_dvo_dev_ops sil164_ops = {
271	.init = sil164_init,
272	.detect = sil164_detect,
273	.mode_valid = sil164_mode_valid,
274	.mode_set = sil164_mode_set,
275	.dpms = sil164_dpms,
276	.get_hw_state = sil164_get_hw_state,
277	.dump_regs = sil164_dump_regs,
278	.destroy = sil164_destroy,
279};
280