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dvo_sil164.c
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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_priv {
62  //I2CDevRec d;
63  bool quiet;
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;
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 
105 static 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 */
132 static 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 
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)
182  else
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, 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 
229 static 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 
244 static 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_LOG_KMS("SIL164_FREQ_LO: 0x%02x\n", val);
250  sil164_readb(dvo, SIL164_FREQ_HI, &val);
251  DRM_LOG_KMS("SIL164_FREQ_HI: 0x%02x\n", val);
252  sil164_readb(dvo, SIL164_REG8, &val);
253  DRM_LOG_KMS("SIL164_REG8: 0x%02x\n", val);
254  sil164_readb(dvo, SIL164_REG9, &val);
255  DRM_LOG_KMS("SIL164_REG9: 0x%02x\n", val);
256  sil164_readb(dvo, SIL164_REGC, &val);
257  DRM_LOG_KMS("SIL164_REGC: 0x%02x\n", val);
258 }
259 
260 static 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 
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 };