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 CH7xxx_REG_VID 0x4a
33 #define CH7xxx_REG_DID 0x4b
34
35 #define CH7011_VID 0x83 /* 7010 as well */
36 #define CH7010B_VID 0x05
37 #define CH7009A_VID 0x84
38 #define CH7009B_VID 0x85
39 #define CH7301_VID 0x95
40
41 #define CH7xxx_VID 0x84
42 #define CH7xxx_DID 0x17
43 #define CH7010_DID 0x16
44
45 #define CH7xxx_NUM_REGS 0x4c
46
47 #define CH7xxx_CM 0x1c
48 #define CH7xxx_CM_XCM (1<<0)
49 #define CH7xxx_CM_MCP (1<<2)
50 #define CH7xxx_INPUT_CLOCK 0x1d
51 #define CH7xxx_GPIO 0x1e
52 #define CH7xxx_GPIO_HPIR (1<<3)
53
54 #define CH7xxx_IDF 0x1f
55 #define CH7xxx_IDF_IBS (1<<7)
56 #define CH7xxx_IDF_DES (1<<6)
57 #define CH7xxx_IDF_HSP (1<<3)
58 #define CH7xxx_IDF_VSP (1<<4)
59
60 #define CH7xxx_CONNECTION_DETECT 0x20
61 #define CH7xxx_CDET_DVI (1<<5)
62
63 #define CH7xxx_DAC_CNTL 0x21
64 #define CH7xxx_SYNCO_MASK (3 << 3)
65 #define CH7xxx_SYNCO_VGA_HSYNC (1 << 3)
66
67 #define CH7xxx_CLOCK_OUTPUT 0x22
68 #define CH7xxx_BCOEN (1 << 4)
69 #define CH7xxx_BCOP (1 << 3)
70 #define CH7xxx_BCO_MASK (7 << 0)
71 #define CH7xxx_BCO_VGA_VSYNC (6 << 0)
72
73 #define CH7301_HOTPLUG 0x23
74 #define CH7xxx_TCTL 0x31
75 #define CH7xxx_TVCO 0x32
76 #define CH7xxx_TPCP 0x33
77 #define CH7xxx_TPD 0x34
78 #define CH7xxx_TPVT 0x35
79 #define CH7xxx_TLPF 0x36
80 #define CH7xxx_TCT 0x37
81 #define CH7301_TEST_PATTERN 0x48
82
83 #define CH7xxx_PM 0x49
84 #define CH7xxx_PM_FPD (1<<0)
85 #define CH7301_PM_DACPD0 (1<<1)
86 #define CH7301_PM_DACPD1 (1<<2)
87 #define CH7301_PM_DACPD2 (1<<3)
88 #define CH7xxx_PM_DVIL (1<<6)
89 #define CH7xxx_PM_DVIP (1<<7)
90
91 #define CH7301_SYNC_POLARITY 0x56
92 #define CH7301_SYNC_RGB_YUV (1<<0)
93 #define CH7301_SYNC_POL_DVI (1<<5)
94
95 /** @file
96 * driver for the Chrontel 7xxx DVI chip over DVO.
97 */
98
99 static struct ch7xxx_id_struct {
100 u8 vid;
101 char *name;
102 } ch7xxx_ids[] = {
103 { CH7011_VID, "CH7011" },
104 { CH7010B_VID, "CH7010B" },
105 { CH7009A_VID, "CH7009A" },
106 { CH7009B_VID, "CH7009B" },
107 { CH7301_VID, "CH7301" },
108 };
109
110 static struct ch7xxx_did_struct {
111 u8 did;
112 char *name;
113 } ch7xxx_dids[] = {
114 { CH7xxx_DID, "CH7XXX" },
115 { CH7010_DID, "CH7010B" },
116 };
117
118 struct ch7xxx_priv {
119 bool quiet;
120 };
121
ch7xxx_get_id(u8 vid)122 static char *ch7xxx_get_id(u8 vid)
123 {
124 int i;
125
126 for (i = 0; i < ARRAY_SIZE(ch7xxx_ids); i++) {
127 if (ch7xxx_ids[i].vid == vid)
128 return ch7xxx_ids[i].name;
129 }
130
131 return NULL;
132 }
133
ch7xxx_get_did(u8 did)134 static char *ch7xxx_get_did(u8 did)
135 {
136 int i;
137
138 for (i = 0; i < ARRAY_SIZE(ch7xxx_dids); i++) {
139 if (ch7xxx_dids[i].did == did)
140 return ch7xxx_dids[i].name;
141 }
142
143 return NULL;
144 }
145
146 /** Reads an 8 bit register */
ch7xxx_readb(struct intel_dvo_device * dvo,int addr,u8 * ch)147 static bool ch7xxx_readb(struct intel_dvo_device *dvo, int addr, u8 *ch)
148 {
149 struct ch7xxx_priv *ch7xxx = dvo->dev_priv;
150 struct i2c_adapter *adapter = dvo->i2c_bus;
151 u8 out_buf[2];
152 u8 in_buf[2];
153
154 struct i2c_msg msgs[] = {
155 {
156 .addr = dvo->slave_addr,
157 .flags = 0,
158 .len = 1,
159 .buf = out_buf,
160 },
161 {
162 .addr = dvo->slave_addr,
163 .flags = I2C_M_RD,
164 .len = 1,
165 .buf = in_buf,
166 }
167 };
168
169 out_buf[0] = addr;
170 out_buf[1] = 0;
171
172 if (i2c_transfer(adapter, msgs, 2) == 2) {
173 *ch = in_buf[0];
174 return true;
175 }
176
177 if (!ch7xxx->quiet) {
178 DRM_DEBUG_KMS("Unable to read register 0x%02x from %s:%02x.\n",
179 addr, adapter->name, dvo->slave_addr);
180 }
181 return false;
182 }
183
184 /** Writes an 8 bit register */
ch7xxx_writeb(struct intel_dvo_device * dvo,int addr,u8 ch)185 static bool ch7xxx_writeb(struct intel_dvo_device *dvo, int addr, u8 ch)
186 {
187 struct ch7xxx_priv *ch7xxx = dvo->dev_priv;
188 struct i2c_adapter *adapter = dvo->i2c_bus;
189 u8 out_buf[2];
190 struct i2c_msg msg = {
191 .addr = dvo->slave_addr,
192 .flags = 0,
193 .len = 2,
194 .buf = out_buf,
195 };
196
197 out_buf[0] = addr;
198 out_buf[1] = ch;
199
200 if (i2c_transfer(adapter, &msg, 1) == 1)
201 return true;
202
203 if (!ch7xxx->quiet) {
204 DRM_DEBUG_KMS("Unable to write register 0x%02x to %s:%d.\n",
205 addr, adapter->name, dvo->slave_addr);
206 }
207
208 return false;
209 }
210
ch7xxx_init(struct intel_dvo_device * dvo,struct i2c_adapter * adapter)211 static bool ch7xxx_init(struct intel_dvo_device *dvo,
212 struct i2c_adapter *adapter)
213 {
214 /* this will detect the CH7xxx chip on the specified i2c bus */
215 struct ch7xxx_priv *ch7xxx;
216 u8 vendor, device;
217 char *name, *devid;
218
219 ch7xxx = kzalloc(sizeof(struct ch7xxx_priv), GFP_KERNEL);
220 if (ch7xxx == NULL)
221 return false;
222
223 dvo->i2c_bus = adapter;
224 dvo->dev_priv = ch7xxx;
225 ch7xxx->quiet = true;
226
227 if (!ch7xxx_readb(dvo, CH7xxx_REG_VID, &vendor))
228 goto out;
229
230 name = ch7xxx_get_id(vendor);
231 if (!name) {
232 DRM_DEBUG_KMS("ch7xxx not detected; got VID 0x%02x from %s slave %d.\n",
233 vendor, adapter->name, dvo->slave_addr);
234 goto out;
235 }
236
237
238 if (!ch7xxx_readb(dvo, CH7xxx_REG_DID, &device))
239 goto out;
240
241 devid = ch7xxx_get_did(device);
242 if (!devid) {
243 DRM_DEBUG_KMS("ch7xxx not detected; got DID 0x%02x from %s slave %d.\n",
244 device, adapter->name, dvo->slave_addr);
245 goto out;
246 }
247
248 ch7xxx->quiet = false;
249 DRM_DEBUG_KMS("Detected %s chipset, vendor/device ID 0x%02x/0x%02x\n",
250 name, vendor, device);
251 return true;
252 out:
253 kfree(ch7xxx);
254 return false;
255 }
256
ch7xxx_detect(struct intel_dvo_device * dvo)257 static enum drm_connector_status ch7xxx_detect(struct intel_dvo_device *dvo)
258 {
259 u8 cdet, orig_pm, pm;
260
261 ch7xxx_readb(dvo, CH7xxx_PM, &orig_pm);
262
263 pm = orig_pm;
264 pm &= ~CH7xxx_PM_FPD;
265 pm |= CH7xxx_PM_DVIL | CH7xxx_PM_DVIP;
266
267 ch7xxx_writeb(dvo, CH7xxx_PM, pm);
268
269 ch7xxx_readb(dvo, CH7xxx_CONNECTION_DETECT, &cdet);
270
271 ch7xxx_writeb(dvo, CH7xxx_PM, orig_pm);
272
273 if (cdet & CH7xxx_CDET_DVI)
274 return connector_status_connected;
275 return connector_status_disconnected;
276 }
277
ch7xxx_mode_valid(struct intel_dvo_device * dvo,struct drm_display_mode * mode)278 static enum drm_mode_status ch7xxx_mode_valid(struct intel_dvo_device *dvo,
279 struct drm_display_mode *mode)
280 {
281 if (mode->clock > 165000)
282 return MODE_CLOCK_HIGH;
283
284 return MODE_OK;
285 }
286
ch7xxx_mode_set(struct intel_dvo_device * dvo,const struct drm_display_mode * mode,const struct drm_display_mode * adjusted_mode)287 static void ch7xxx_mode_set(struct intel_dvo_device *dvo,
288 const struct drm_display_mode *mode,
289 const struct drm_display_mode *adjusted_mode)
290 {
291 u8 tvco, tpcp, tpd, tlpf, idf;
292
293 if (mode->clock <= 65000) {
294 tvco = 0x23;
295 tpcp = 0x08;
296 tpd = 0x16;
297 tlpf = 0x60;
298 } else {
299 tvco = 0x2d;
300 tpcp = 0x06;
301 tpd = 0x26;
302 tlpf = 0xa0;
303 }
304
305 ch7xxx_writeb(dvo, CH7xxx_TCTL, 0x00);
306 ch7xxx_writeb(dvo, CH7xxx_TVCO, tvco);
307 ch7xxx_writeb(dvo, CH7xxx_TPCP, tpcp);
308 ch7xxx_writeb(dvo, CH7xxx_TPD, tpd);
309 ch7xxx_writeb(dvo, CH7xxx_TPVT, 0x30);
310 ch7xxx_writeb(dvo, CH7xxx_TLPF, tlpf);
311 ch7xxx_writeb(dvo, CH7xxx_TCT, 0x00);
312
313 ch7xxx_readb(dvo, CH7xxx_IDF, &idf);
314
315 idf |= CH7xxx_IDF_IBS;
316
317 idf &= ~(CH7xxx_IDF_HSP | CH7xxx_IDF_VSP);
318 if (mode->flags & DRM_MODE_FLAG_PHSYNC)
319 idf |= CH7xxx_IDF_HSP;
320
321 if (mode->flags & DRM_MODE_FLAG_PVSYNC)
322 idf |= CH7xxx_IDF_VSP;
323
324 ch7xxx_writeb(dvo, CH7xxx_IDF, idf);
325
326 ch7xxx_writeb(dvo, CH7xxx_DAC_CNTL,
327 CH7xxx_SYNCO_VGA_HSYNC);
328 ch7xxx_writeb(dvo, CH7xxx_CLOCK_OUTPUT,
329 CH7xxx_BCOEN | CH7xxx_BCO_VGA_VSYNC);
330 }
331
332 /* set the CH7xxx power state */
ch7xxx_dpms(struct intel_dvo_device * dvo,bool enable)333 static void ch7xxx_dpms(struct intel_dvo_device *dvo, bool enable)
334 {
335 if (enable)
336 ch7xxx_writeb(dvo, CH7xxx_PM, CH7xxx_PM_DVIL | CH7xxx_PM_DVIP);
337 else
338 ch7xxx_writeb(dvo, CH7xxx_PM, CH7xxx_PM_FPD);
339 }
340
ch7xxx_get_hw_state(struct intel_dvo_device * dvo)341 static bool ch7xxx_get_hw_state(struct intel_dvo_device *dvo)
342 {
343 u8 val;
344
345 ch7xxx_readb(dvo, CH7xxx_PM, &val);
346
347 if (val & (CH7xxx_PM_DVIL | CH7xxx_PM_DVIP))
348 return true;
349 else
350 return false;
351 }
352
ch7xxx_dump_regs(struct intel_dvo_device * dvo)353 static void ch7xxx_dump_regs(struct intel_dvo_device *dvo)
354 {
355 int i;
356
357 for (i = 0; i < CH7xxx_NUM_REGS; i++) {
358 u8 val;
359 if ((i % 8) == 0)
360 DRM_DEBUG_KMS("\n %02X: ", i);
361 ch7xxx_readb(dvo, i, &val);
362 DRM_DEBUG_KMS("%02X ", val);
363 }
364 }
365
ch7xxx_destroy(struct intel_dvo_device * dvo)366 static void ch7xxx_destroy(struct intel_dvo_device *dvo)
367 {
368 struct ch7xxx_priv *ch7xxx = dvo->dev_priv;
369
370 if (ch7xxx) {
371 kfree(ch7xxx);
372 dvo->dev_priv = NULL;
373 }
374 }
375
376 const struct intel_dvo_dev_ops ch7xxx_ops = {
377 .init = ch7xxx_init,
378 .detect = ch7xxx_detect,
379 .mode_valid = ch7xxx_mode_valid,
380 .mode_set = ch7xxx_mode_set,
381 .dpms = ch7xxx_dpms,
382 .get_hw_state = ch7xxx_get_hw_state,
383 .dump_regs = ch7xxx_dump_regs,
384 .destroy = ch7xxx_destroy,
385 };
386