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 "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 | |
66 | struct sil164_priv { |
67 | //I2CDevRec d; |
68 | bool quiet; |
69 | }; |
70 | |
71 | #define SILPTR(d) ((SIL164Ptr)(d->DriverPrivate.ptr)) |
72 | |
73 | static 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(adap: adapter, msgs, num: 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 | |
110 | static 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(adap: adapter, msgs: &msg, num: 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 */ |
137 | static 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(size: 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: &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: &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 | |
174 | out: |
175 | kfree(objp: sil); |
176 | return false; |
177 | } |
178 | |
179 | static enum drm_connector_status sil164_detect(struct intel_dvo_device *dvo) |
180 | { |
181 | u8 reg9; |
182 | |
183 | sil164_readb(dvo, SIL164_REG9, ch: ®9); |
184 | |
185 | if (reg9 & SIL164_9_HTPLG) |
186 | return connector_status_connected; |
187 | else |
188 | return connector_status_disconnected; |
189 | } |
190 | |
191 | static 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 | |
197 | static 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 */ |
222 | static 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: &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 | |
239 | static 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: &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 | |
254 | static void sil164_dump_regs(struct intel_dvo_device *dvo) |
255 | { |
256 | u8 val; |
257 | |
258 | sil164_readb(dvo, SIL164_FREQ_LO, ch: &val); |
259 | DRM_DEBUG_KMS("SIL164_FREQ_LO: 0x%02x\n" , val); |
260 | sil164_readb(dvo, SIL164_FREQ_HI, ch: &val); |
261 | DRM_DEBUG_KMS("SIL164_FREQ_HI: 0x%02x\n" , val); |
262 | sil164_readb(dvo, SIL164_REG8, ch: &val); |
263 | DRM_DEBUG_KMS("SIL164_REG8: 0x%02x\n" , val); |
264 | sil164_readb(dvo, SIL164_REG9, ch: &val); |
265 | DRM_DEBUG_KMS("SIL164_REG9: 0x%02x\n" , val); |
266 | sil164_readb(dvo, SIL164_REGC, ch: &val); |
267 | DRM_DEBUG_KMS("SIL164_REGC: 0x%02x\n" , val); |
268 | } |
269 | |
270 | static void sil164_destroy(struct intel_dvo_device *dvo) |
271 | { |
272 | struct sil164_priv *sil = dvo->dev_priv; |
273 | |
274 | if (sil) { |
275 | kfree(objp: sil); |
276 | dvo->dev_priv = NULL; |
277 | } |
278 | } |
279 | |
280 | const 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 | |