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79e53945 JB |
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 CH7xxx_REG_VID 0x4a | |
32 | #define CH7xxx_REG_DID 0x4b | |
33 | ||
34 | #define CH7011_VID 0x83 /* 7010 as well */ | |
35 | #define CH7009A_VID 0x84 | |
36 | #define CH7009B_VID 0x85 | |
37 | #define CH7301_VID 0x95 | |
38 | ||
39 | #define CH7xxx_VID 0x84 | |
40 | #define CH7xxx_DID 0x17 | |
41 | ||
42 | #define CH7xxx_NUM_REGS 0x4c | |
43 | ||
44 | #define CH7xxx_CM 0x1c | |
45 | #define CH7xxx_CM_XCM (1<<0) | |
46 | #define CH7xxx_CM_MCP (1<<2) | |
47 | #define CH7xxx_INPUT_CLOCK 0x1d | |
48 | #define CH7xxx_GPIO 0x1e | |
49 | #define CH7xxx_GPIO_HPIR (1<<3) | |
50 | #define CH7xxx_IDF 0x1f | |
51 | ||
52 | #define CH7xxx_IDF_HSP (1<<3) | |
53 | #define CH7xxx_IDF_VSP (1<<4) | |
54 | ||
55 | #define CH7xxx_CONNECTION_DETECT 0x20 | |
56 | #define CH7xxx_CDET_DVI (1<<5) | |
57 | ||
58 | #define CH7301_DAC_CNTL 0x21 | |
59 | #define CH7301_HOTPLUG 0x23 | |
60 | #define CH7xxx_TCTL 0x31 | |
61 | #define CH7xxx_TVCO 0x32 | |
62 | #define CH7xxx_TPCP 0x33 | |
63 | #define CH7xxx_TPD 0x34 | |
64 | #define CH7xxx_TPVT 0x35 | |
65 | #define CH7xxx_TLPF 0x36 | |
66 | #define CH7xxx_TCT 0x37 | |
67 | #define CH7301_TEST_PATTERN 0x48 | |
68 | ||
69 | #define CH7xxx_PM 0x49 | |
70 | #define CH7xxx_PM_FPD (1<<0) | |
71 | #define CH7301_PM_DACPD0 (1<<1) | |
72 | #define CH7301_PM_DACPD1 (1<<2) | |
73 | #define CH7301_PM_DACPD2 (1<<3) | |
74 | #define CH7xxx_PM_DVIL (1<<6) | |
75 | #define CH7xxx_PM_DVIP (1<<7) | |
76 | ||
77 | #define CH7301_SYNC_POLARITY 0x56 | |
78 | #define CH7301_SYNC_RGB_YUV (1<<0) | |
79 | #define CH7301_SYNC_POL_DVI (1<<5) | |
80 | ||
81 | /** @file | |
82 | * driver for the Chrontel 7xxx DVI chip over DVO. | |
83 | */ | |
84 | ||
85 | static struct ch7xxx_id_struct { | |
86 | uint8_t vid; | |
87 | char *name; | |
88 | } ch7xxx_ids[] = { | |
89 | { CH7011_VID, "CH7011" }, | |
90 | { CH7009A_VID, "CH7009A" }, | |
91 | { CH7009B_VID, "CH7009B" }, | |
92 | { CH7301_VID, "CH7301" }, | |
93 | }; | |
94 | ||
95 | struct ch7xxx_reg_state { | |
96 | uint8_t regs[CH7xxx_NUM_REGS]; | |
97 | }; | |
98 | ||
99 | struct ch7xxx_priv { | |
100 | bool quiet; | |
101 | ||
102 | struct ch7xxx_reg_state save_reg; | |
103 | struct ch7xxx_reg_state mode_reg; | |
104 | uint8_t save_TCTL, save_TPCP, save_TPD, save_TPVT; | |
105 | uint8_t save_TLPF, save_TCT, save_PM, save_IDF; | |
106 | }; | |
107 | ||
108 | static void ch7xxx_save(struct intel_dvo_device *dvo); | |
109 | ||
110 | static char *ch7xxx_get_id(uint8_t vid) | |
111 | { | |
112 | int i; | |
113 | ||
114 | for (i = 0; i < ARRAY_SIZE(ch7xxx_ids); i++) { | |
115 | if (ch7xxx_ids[i].vid == vid) | |
116 | return ch7xxx_ids[i].name; | |
117 | } | |
118 | ||
119 | return NULL; | |
120 | } | |
121 | ||
122 | /** Reads an 8 bit register */ | |
123 | static bool ch7xxx_readb(struct intel_dvo_device *dvo, int addr, uint8_t *ch) | |
124 | { | |
125 | struct ch7xxx_priv *ch7xxx= dvo->dev_priv; | |
f9c10a9b KP |
126 | struct i2c_adapter *adapter = dvo->i2c_bus; |
127 | struct intel_i2c_chan *i2cbus = container_of(adapter, struct intel_i2c_chan, adapter); | |
79e53945 JB |
128 | u8 out_buf[2]; |
129 | u8 in_buf[2]; | |
130 | ||
131 | struct i2c_msg msgs[] = { | |
132 | { | |
f9c10a9b | 133 | .addr = dvo->slave_addr, |
79e53945 JB |
134 | .flags = 0, |
135 | .len = 1, | |
136 | .buf = out_buf, | |
137 | }, | |
138 | { | |
f9c10a9b | 139 | .addr = dvo->slave_addr, |
79e53945 JB |
140 | .flags = I2C_M_RD, |
141 | .len = 1, | |
142 | .buf = in_buf, | |
143 | } | |
144 | }; | |
145 | ||
146 | out_buf[0] = addr; | |
147 | out_buf[1] = 0; | |
148 | ||
149 | if (i2c_transfer(&i2cbus->adapter, msgs, 2) == 2) { | |
150 | *ch = in_buf[0]; | |
151 | return true; | |
152 | }; | |
153 | ||
154 | if (!ch7xxx->quiet) { | |
155 | DRM_DEBUG("Unable to read register 0x%02x from %s:%02x.\n", | |
f9c10a9b | 156 | addr, i2cbus->adapter.name, dvo->slave_addr); |
79e53945 JB |
157 | } |
158 | return false; | |
159 | } | |
160 | ||
161 | /** Writes an 8 bit register */ | |
162 | static bool ch7xxx_writeb(struct intel_dvo_device *dvo, int addr, uint8_t ch) | |
163 | { | |
164 | struct ch7xxx_priv *ch7xxx = dvo->dev_priv; | |
f9c10a9b KP |
165 | struct i2c_adapter *adapter = dvo->i2c_bus; |
166 | struct intel_i2c_chan *i2cbus = container_of(adapter, struct intel_i2c_chan, adapter); | |
79e53945 JB |
167 | uint8_t out_buf[2]; |
168 | struct i2c_msg msg = { | |
f9c10a9b | 169 | .addr = dvo->slave_addr, |
79e53945 JB |
170 | .flags = 0, |
171 | .len = 2, | |
172 | .buf = out_buf, | |
173 | }; | |
174 | ||
175 | out_buf[0] = addr; | |
176 | out_buf[1] = ch; | |
177 | ||
178 | if (i2c_transfer(&i2cbus->adapter, &msg, 1) == 1) | |
179 | return true; | |
180 | ||
181 | if (!ch7xxx->quiet) { | |
182 | DRM_DEBUG("Unable to write register 0x%02x to %s:%d.\n", | |
f9c10a9b | 183 | addr, i2cbus->adapter.name, dvo->slave_addr); |
79e53945 JB |
184 | } |
185 | ||
186 | return false; | |
187 | } | |
188 | ||
189 | static bool ch7xxx_init(struct intel_dvo_device *dvo, | |
f9c10a9b | 190 | struct i2c_adapter *adapter) |
79e53945 JB |
191 | { |
192 | /* this will detect the CH7xxx chip on the specified i2c bus */ | |
193 | struct ch7xxx_priv *ch7xxx; | |
194 | uint8_t vendor, device; | |
195 | char *name; | |
196 | ||
197 | ch7xxx = kzalloc(sizeof(struct ch7xxx_priv), GFP_KERNEL); | |
198 | if (ch7xxx == NULL) | |
199 | return false; | |
200 | ||
f9c10a9b | 201 | dvo->i2c_bus = adapter; |
79e53945 JB |
202 | dvo->dev_priv = ch7xxx; |
203 | ch7xxx->quiet = true; | |
204 | ||
205 | if (!ch7xxx_readb(dvo, CH7xxx_REG_VID, &vendor)) | |
206 | goto out; | |
207 | ||
208 | name = ch7xxx_get_id(vendor); | |
209 | if (!name) { | |
210 | DRM_DEBUG("ch7xxx not detected; got 0x%02x from %s slave %d.\n", | |
f9c10a9b | 211 | vendor, adapter->name, dvo->slave_addr); |
79e53945 JB |
212 | goto out; |
213 | } | |
214 | ||
215 | ||
216 | if (!ch7xxx_readb(dvo, CH7xxx_REG_DID, &device)) | |
217 | goto out; | |
218 | ||
219 | if (device != CH7xxx_DID) { | |
220 | DRM_DEBUG("ch7xxx not detected; got 0x%02x from %s slave %d.\n", | |
f9c10a9b | 221 | vendor, adapter->name, dvo->slave_addr); |
79e53945 JB |
222 | goto out; |
223 | } | |
224 | ||
225 | ch7xxx->quiet = false; | |
226 | DRM_DEBUG("Detected %s chipset, vendor/device ID 0x%02x/0x%02x\n", | |
227 | name, vendor, device); | |
228 | return true; | |
229 | out: | |
230 | kfree(ch7xxx); | |
231 | return false; | |
232 | } | |
233 | ||
234 | static enum drm_connector_status ch7xxx_detect(struct intel_dvo_device *dvo) | |
235 | { | |
236 | uint8_t cdet, orig_pm, pm; | |
237 | ||
238 | ch7xxx_readb(dvo, CH7xxx_PM, &orig_pm); | |
239 | ||
240 | pm = orig_pm; | |
241 | pm &= ~CH7xxx_PM_FPD; | |
242 | pm |= CH7xxx_PM_DVIL | CH7xxx_PM_DVIP; | |
243 | ||
244 | ch7xxx_writeb(dvo, CH7xxx_PM, pm); | |
245 | ||
246 | ch7xxx_readb(dvo, CH7xxx_CONNECTION_DETECT, &cdet); | |
247 | ||
248 | ch7xxx_writeb(dvo, CH7xxx_PM, orig_pm); | |
249 | ||
250 | if (cdet & CH7xxx_CDET_DVI) | |
251 | return connector_status_connected; | |
252 | return connector_status_disconnected; | |
253 | } | |
254 | ||
255 | static enum drm_mode_status ch7xxx_mode_valid(struct intel_dvo_device *dvo, | |
256 | struct drm_display_mode *mode) | |
257 | { | |
258 | if (mode->clock > 165000) | |
259 | return MODE_CLOCK_HIGH; | |
260 | ||
261 | return MODE_OK; | |
262 | } | |
263 | ||
264 | static void ch7xxx_mode_set(struct intel_dvo_device *dvo, | |
265 | struct drm_display_mode *mode, | |
266 | struct drm_display_mode *adjusted_mode) | |
267 | { | |
268 | uint8_t tvco, tpcp, tpd, tlpf, idf; | |
269 | ||
270 | if (mode->clock <= 65000) { | |
271 | tvco = 0x23; | |
272 | tpcp = 0x08; | |
273 | tpd = 0x16; | |
274 | tlpf = 0x60; | |
275 | } else { | |
276 | tvco = 0x2d; | |
277 | tpcp = 0x06; | |
278 | tpd = 0x26; | |
279 | tlpf = 0xa0; | |
280 | } | |
281 | ||
282 | ch7xxx_writeb(dvo, CH7xxx_TCTL, 0x00); | |
283 | ch7xxx_writeb(dvo, CH7xxx_TVCO, tvco); | |
284 | ch7xxx_writeb(dvo, CH7xxx_TPCP, tpcp); | |
285 | ch7xxx_writeb(dvo, CH7xxx_TPD, tpd); | |
286 | ch7xxx_writeb(dvo, CH7xxx_TPVT, 0x30); | |
287 | ch7xxx_writeb(dvo, CH7xxx_TLPF, tlpf); | |
288 | ch7xxx_writeb(dvo, CH7xxx_TCT, 0x00); | |
289 | ||
290 | ch7xxx_readb(dvo, CH7xxx_IDF, &idf); | |
291 | ||
292 | idf &= ~(CH7xxx_IDF_HSP | CH7xxx_IDF_VSP); | |
293 | if (mode->flags & DRM_MODE_FLAG_PHSYNC) | |
294 | idf |= CH7xxx_IDF_HSP; | |
295 | ||
296 | if (mode->flags & DRM_MODE_FLAG_PVSYNC) | |
297 | idf |= CH7xxx_IDF_HSP; | |
298 | ||
299 | ch7xxx_writeb(dvo, CH7xxx_IDF, idf); | |
300 | } | |
301 | ||
302 | /* set the CH7xxx power state */ | |
303 | static void ch7xxx_dpms(struct intel_dvo_device *dvo, int mode) | |
304 | { | |
305 | if (mode == DRM_MODE_DPMS_ON) | |
306 | ch7xxx_writeb(dvo, CH7xxx_PM, CH7xxx_PM_DVIL | CH7xxx_PM_DVIP); | |
307 | else | |
308 | ch7xxx_writeb(dvo, CH7xxx_PM, CH7xxx_PM_FPD); | |
309 | } | |
310 | ||
311 | static void ch7xxx_dump_regs(struct intel_dvo_device *dvo) | |
312 | { | |
313 | struct ch7xxx_priv *ch7xxx = dvo->dev_priv; | |
314 | int i; | |
315 | ||
316 | for (i = 0; i < CH7xxx_NUM_REGS; i++) { | |
317 | if ((i % 8) == 0 ) | |
318 | DRM_DEBUG("\n %02X: ", i); | |
319 | DRM_DEBUG("%02X ", ch7xxx->mode_reg.regs[i]); | |
320 | } | |
321 | } | |
322 | ||
323 | static void ch7xxx_save(struct intel_dvo_device *dvo) | |
324 | { | |
325 | struct ch7xxx_priv *ch7xxx= dvo->dev_priv; | |
326 | ||
327 | ch7xxx_readb(dvo, CH7xxx_TCTL, &ch7xxx->save_TCTL); | |
328 | ch7xxx_readb(dvo, CH7xxx_TPCP, &ch7xxx->save_TPCP); | |
329 | ch7xxx_readb(dvo, CH7xxx_TPD, &ch7xxx->save_TPD); | |
330 | ch7xxx_readb(dvo, CH7xxx_TPVT, &ch7xxx->save_TPVT); | |
331 | ch7xxx_readb(dvo, CH7xxx_TLPF, &ch7xxx->save_TLPF); | |
332 | ch7xxx_readb(dvo, CH7xxx_PM, &ch7xxx->save_PM); | |
333 | ch7xxx_readb(dvo, CH7xxx_IDF, &ch7xxx->save_IDF); | |
334 | } | |
335 | ||
336 | static void ch7xxx_restore(struct intel_dvo_device *dvo) | |
337 | { | |
338 | struct ch7xxx_priv *ch7xxx = dvo->dev_priv; | |
339 | ||
340 | ch7xxx_writeb(dvo, CH7xxx_TCTL, ch7xxx->save_TCTL); | |
341 | ch7xxx_writeb(dvo, CH7xxx_TPCP, ch7xxx->save_TPCP); | |
342 | ch7xxx_writeb(dvo, CH7xxx_TPD, ch7xxx->save_TPD); | |
343 | ch7xxx_writeb(dvo, CH7xxx_TPVT, ch7xxx->save_TPVT); | |
344 | ch7xxx_writeb(dvo, CH7xxx_TLPF, ch7xxx->save_TLPF); | |
345 | ch7xxx_writeb(dvo, CH7xxx_IDF, ch7xxx->save_IDF); | |
346 | ch7xxx_writeb(dvo, CH7xxx_PM, ch7xxx->save_PM); | |
347 | } | |
348 | ||
349 | static void ch7xxx_destroy(struct intel_dvo_device *dvo) | |
350 | { | |
351 | struct ch7xxx_priv *ch7xxx = dvo->dev_priv; | |
352 | ||
353 | if (ch7xxx) { | |
354 | kfree(ch7xxx); | |
355 | dvo->dev_priv = NULL; | |
356 | } | |
357 | } | |
358 | ||
359 | struct intel_dvo_dev_ops ch7xxx_ops = { | |
360 | .init = ch7xxx_init, | |
361 | .detect = ch7xxx_detect, | |
362 | .mode_valid = ch7xxx_mode_valid, | |
363 | .mode_set = ch7xxx_mode_set, | |
364 | .dpms = ch7xxx_dpms, | |
365 | .dump_regs = ch7xxx_dump_regs, | |
366 | .save = ch7xxx_save, | |
367 | .restore = ch7xxx_restore, | |
368 | .destroy = ch7xxx_destroy, | |
369 | }; |