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 #define CH7xxx_IDF 0x1f
54
55 #define CH7xxx_IDF_HSP (1<<3)
56 #define CH7xxx_IDF_VSP (1<<4)
57
58 #define CH7xxx_CONNECTION_DETECT 0x20
59 #define CH7xxx_CDET_DVI (1<<5)
60
61 #define CH7301_DAC_CNTL 0x21
62 #define CH7301_HOTPLUG 0x23
63 #define CH7xxx_TCTL 0x31
64 #define CH7xxx_TVCO 0x32
65 #define CH7xxx_TPCP 0x33
66 #define CH7xxx_TPD 0x34
67 #define CH7xxx_TPVT 0x35
68 #define CH7xxx_TLPF 0x36
69 #define CH7xxx_TCT 0x37
70 #define CH7301_TEST_PATTERN 0x48
71
72 #define CH7xxx_PM 0x49
73 #define CH7xxx_PM_FPD (1<<0)
74 #define CH7301_PM_DACPD0 (1<<1)
75 #define CH7301_PM_DACPD1 (1<<2)
76 #define CH7301_PM_DACPD2 (1<<3)
77 #define CH7xxx_PM_DVIL (1<<6)
78 #define CH7xxx_PM_DVIP (1<<7)
79
80 #define CH7301_SYNC_POLARITY 0x56
81 #define CH7301_SYNC_RGB_YUV (1<<0)
82 #define CH7301_SYNC_POL_DVI (1<<5)
83
84 /** @file
85 * driver for the Chrontel 7xxx DVI chip over DVO.
86 */
87
88 static struct ch7xxx_id_struct {
89 u8 vid;
90 char *name;
91 } ch7xxx_ids[] = {
92 { CH7011_VID, "CH7011" },
93 { CH7010B_VID, "CH7010B" },
94 { CH7009A_VID, "CH7009A" },
95 { CH7009B_VID, "CH7009B" },
96 { CH7301_VID, "CH7301" },
97 };
98
99 static struct ch7xxx_did_struct {
100 u8 did;
101 char *name;
102 } ch7xxx_dids[] = {
103 { CH7xxx_DID, "CH7XXX" },
104 { CH7010_DID, "CH7010B" },
105 };
106
107 struct ch7xxx_priv {
108 bool quiet;
109 };
110
ch7xxx_get_id(u8 vid)111 static char *ch7xxx_get_id(u8 vid)
112 {
113 int i;
114
115 for (i = 0; i < ARRAY_SIZE(ch7xxx_ids); i++) {
116 if (ch7xxx_ids[i].vid == vid)
117 return ch7xxx_ids[i].name;
118 }
119
120 return NULL;
121 }
122
ch7xxx_get_did(u8 did)123 static char *ch7xxx_get_did(u8 did)
124 {
125 int i;
126
127 for (i = 0; i < ARRAY_SIZE(ch7xxx_dids); i++) {
128 if (ch7xxx_dids[i].did == did)
129 return ch7xxx_dids[i].name;
130 }
131
132 return NULL;
133 }
134
135 /** Reads an 8 bit register */
ch7xxx_readb(struct intel_dvo_device * dvo,int addr,u8 * ch)136 static bool ch7xxx_readb(struct intel_dvo_device *dvo, int addr, u8 *ch)
137 {
138 struct ch7xxx_priv *ch7xxx = dvo->dev_priv;
139 struct i2c_adapter *adapter = dvo->i2c_bus;
140 u8 out_buf[2];
141 u8 in_buf[2];
142
143 struct i2c_msg msgs[] = {
144 {
145 .addr = dvo->slave_addr,
146 .flags = 0,
147 .len = 1,
148 .buf = out_buf,
149 },
150 {
151 .addr = dvo->slave_addr,
152 .flags = I2C_M_RD,
153 .len = 1,
154 .buf = in_buf,
155 }
156 };
157
158 out_buf[0] = addr;
159 out_buf[1] = 0;
160
161 if (i2c_transfer(adapter, msgs, 2) == 2) {
162 *ch = in_buf[0];
163 return true;
164 }
165
166 if (!ch7xxx->quiet) {
167 DRM_DEBUG_KMS("Unable to read register 0x%02x from %s:%02x.\n",
168 addr, adapter->name, dvo->slave_addr);
169 }
170 return false;
171 }
172
173 /** Writes an 8 bit register */
ch7xxx_writeb(struct intel_dvo_device * dvo,int addr,u8 ch)174 static bool ch7xxx_writeb(struct intel_dvo_device *dvo, int addr, u8 ch)
175 {
176 struct ch7xxx_priv *ch7xxx = dvo->dev_priv;
177 struct i2c_adapter *adapter = dvo->i2c_bus;
178 u8 out_buf[2];
179 struct i2c_msg msg = {
180 .addr = dvo->slave_addr,
181 .flags = 0,
182 .len = 2,
183 .buf = out_buf,
184 };
185
186 out_buf[0] = addr;
187 out_buf[1] = ch;
188
189 if (i2c_transfer(adapter, &msg, 1) == 1)
190 return true;
191
192 if (!ch7xxx->quiet) {
193 DRM_DEBUG_KMS("Unable to write register 0x%02x to %s:%d.\n",
194 addr, adapter->name, dvo->slave_addr);
195 }
196
197 return false;
198 }
199
ch7xxx_init(struct intel_dvo_device * dvo,struct i2c_adapter * adapter)200 static bool ch7xxx_init(struct intel_dvo_device *dvo,
201 struct i2c_adapter *adapter)
202 {
203 /* this will detect the CH7xxx chip on the specified i2c bus */
204 struct ch7xxx_priv *ch7xxx;
205 u8 vendor, device;
206 char *name, *devid;
207
208 ch7xxx = kzalloc(sizeof(struct ch7xxx_priv), GFP_KERNEL);
209 if (ch7xxx == NULL)
210 return false;
211
212 dvo->i2c_bus = adapter;
213 dvo->dev_priv = ch7xxx;
214 ch7xxx->quiet = true;
215
216 if (!ch7xxx_readb(dvo, CH7xxx_REG_VID, &vendor))
217 goto out;
218
219 name = ch7xxx_get_id(vendor);
220 if (!name) {
221 DRM_DEBUG_KMS("ch7xxx not detected; got VID 0x%02x from %s slave %d.\n",
222 vendor, adapter->name, dvo->slave_addr);
223 goto out;
224 }
225
226
227 if (!ch7xxx_readb(dvo, CH7xxx_REG_DID, &device))
228 goto out;
229
230 devid = ch7xxx_get_did(device);
231 if (!devid) {
232 DRM_DEBUG_KMS("ch7xxx not detected; got DID 0x%02x from %s slave %d.\n",
233 device, adapter->name, dvo->slave_addr);
234 goto out;
235 }
236
237 ch7xxx->quiet = false;
238 DRM_DEBUG_KMS("Detected %s chipset, vendor/device ID 0x%02x/0x%02x\n",
239 name, vendor, device);
240 return true;
241 out:
242 kfree(ch7xxx);
243 return false;
244 }
245
ch7xxx_detect(struct intel_dvo_device * dvo)246 static enum drm_connector_status ch7xxx_detect(struct intel_dvo_device *dvo)
247 {
248 u8 cdet, orig_pm, pm;
249
250 ch7xxx_readb(dvo, CH7xxx_PM, &orig_pm);
251
252 pm = orig_pm;
253 pm &= ~CH7xxx_PM_FPD;
254 pm |= CH7xxx_PM_DVIL | CH7xxx_PM_DVIP;
255
256 ch7xxx_writeb(dvo, CH7xxx_PM, pm);
257
258 ch7xxx_readb(dvo, CH7xxx_CONNECTION_DETECT, &cdet);
259
260 ch7xxx_writeb(dvo, CH7xxx_PM, orig_pm);
261
262 if (cdet & CH7xxx_CDET_DVI)
263 return connector_status_connected;
264 return connector_status_disconnected;
265 }
266
ch7xxx_mode_valid(struct intel_dvo_device * dvo,struct drm_display_mode * mode)267 static enum drm_mode_status ch7xxx_mode_valid(struct intel_dvo_device *dvo,
268 struct drm_display_mode *mode)
269 {
270 if (mode->clock > 165000)
271 return MODE_CLOCK_HIGH;
272
273 return MODE_OK;
274 }
275
ch7xxx_mode_set(struct intel_dvo_device * dvo,const struct drm_display_mode * mode,const struct drm_display_mode * adjusted_mode)276 static void ch7xxx_mode_set(struct intel_dvo_device *dvo,
277 const struct drm_display_mode *mode,
278 const struct drm_display_mode *adjusted_mode)
279 {
280 u8 tvco, tpcp, tpd, tlpf, idf;
281
282 if (mode->clock <= 65000) {
283 tvco = 0x23;
284 tpcp = 0x08;
285 tpd = 0x16;
286 tlpf = 0x60;
287 } else {
288 tvco = 0x2d;
289 tpcp = 0x06;
290 tpd = 0x26;
291 tlpf = 0xa0;
292 }
293
294 ch7xxx_writeb(dvo, CH7xxx_TCTL, 0x00);
295 ch7xxx_writeb(dvo, CH7xxx_TVCO, tvco);
296 ch7xxx_writeb(dvo, CH7xxx_TPCP, tpcp);
297 ch7xxx_writeb(dvo, CH7xxx_TPD, tpd);
298 ch7xxx_writeb(dvo, CH7xxx_TPVT, 0x30);
299 ch7xxx_writeb(dvo, CH7xxx_TLPF, tlpf);
300 ch7xxx_writeb(dvo, CH7xxx_TCT, 0x00);
301
302 ch7xxx_readb(dvo, CH7xxx_IDF, &idf);
303
304 idf &= ~(CH7xxx_IDF_HSP | CH7xxx_IDF_VSP);
305 if (mode->flags & DRM_MODE_FLAG_PHSYNC)
306 idf |= CH7xxx_IDF_HSP;
307
308 if (mode->flags & DRM_MODE_FLAG_PVSYNC)
309 idf |= CH7xxx_IDF_VSP;
310
311 ch7xxx_writeb(dvo, CH7xxx_IDF, idf);
312 }
313
314 /* set the CH7xxx power state */
ch7xxx_dpms(struct intel_dvo_device * dvo,bool enable)315 static void ch7xxx_dpms(struct intel_dvo_device *dvo, bool enable)
316 {
317 if (enable)
318 ch7xxx_writeb(dvo, CH7xxx_PM, CH7xxx_PM_DVIL | CH7xxx_PM_DVIP);
319 else
320 ch7xxx_writeb(dvo, CH7xxx_PM, CH7xxx_PM_FPD);
321 }
322
ch7xxx_get_hw_state(struct intel_dvo_device * dvo)323 static bool ch7xxx_get_hw_state(struct intel_dvo_device *dvo)
324 {
325 u8 val;
326
327 ch7xxx_readb(dvo, CH7xxx_PM, &val);
328
329 if (val & (CH7xxx_PM_DVIL | CH7xxx_PM_DVIP))
330 return true;
331 else
332 return false;
333 }
334
ch7xxx_dump_regs(struct intel_dvo_device * dvo)335 static void ch7xxx_dump_regs(struct intel_dvo_device *dvo)
336 {
337 int i;
338
339 for (i = 0; i < CH7xxx_NUM_REGS; i++) {
340 u8 val;
341 if ((i % 8) == 0)
342 DRM_DEBUG_KMS("\n %02X: ", i);
343 ch7xxx_readb(dvo, i, &val);
344 DRM_DEBUG_KMS("%02X ", val);
345 }
346 }
347
ch7xxx_destroy(struct intel_dvo_device * dvo)348 static void ch7xxx_destroy(struct intel_dvo_device *dvo)
349 {
350 struct ch7xxx_priv *ch7xxx = dvo->dev_priv;
351
352 if (ch7xxx) {
353 kfree(ch7xxx);
354 dvo->dev_priv = NULL;
355 }
356 }
357
358 const struct intel_dvo_dev_ops ch7xxx_ops = {
359 .init = ch7xxx_init,
360 .detect = ch7xxx_detect,
361 .mode_valid = ch7xxx_mode_valid,
362 .mode_set = ch7xxx_mode_set,
363 .dpms = ch7xxx_dpms,
364 .get_hw_state = ch7xxx_get_hw_state,
365 .dump_regs = ch7xxx_dump_regs,
366 .destroy = ch7xxx_destroy,
367 };
368
