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, ®9); |
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, 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_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 | |
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 | |
270 | struct 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 | |