1 /*
2 * Copyright (C) 2009 Francisco Jerez.
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial
15 * portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 *
25 */
26
27 #include <linux/module.h>
28
29 #include "ch7006_priv.h"
30
31 /* DRM encoder functions */
32
ch7006_encoder_set_config(struct drm_encoder * encoder,void * params)33 static void ch7006_encoder_set_config(struct drm_encoder *encoder,
34 void *params)
35 {
36 struct ch7006_priv *priv = to_ch7006_priv(encoder);
37
38 priv->params = *(struct ch7006_encoder_params *)params;
39 }
40
ch7006_encoder_destroy(struct drm_encoder * encoder)41 static void ch7006_encoder_destroy(struct drm_encoder *encoder)
42 {
43 struct ch7006_priv *priv = to_ch7006_priv(encoder);
44
45 drm_property_destroy(encoder->dev, priv->scale_property);
46
47 kfree(priv);
48 to_encoder_slave(encoder)->slave_priv = NULL;
49
50 drm_i2c_encoder_destroy(encoder);
51 }
52
ch7006_encoder_dpms(struct drm_encoder * encoder,int mode)53 static void ch7006_encoder_dpms(struct drm_encoder *encoder, int mode)
54 {
55 struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
56 struct ch7006_priv *priv = to_ch7006_priv(encoder);
57 struct ch7006_state *state = &priv->state;
58
59 ch7006_dbg(client, "\n");
60
61 if (mode == priv->last_dpms)
62 return;
63 priv->last_dpms = mode;
64
65 ch7006_setup_power_state(encoder);
66
67 ch7006_load_reg(client, state, CH7006_POWER);
68 }
69
ch7006_encoder_save(struct drm_encoder * encoder)70 static void ch7006_encoder_save(struct drm_encoder *encoder)
71 {
72 struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
73 struct ch7006_priv *priv = to_ch7006_priv(encoder);
74
75 ch7006_dbg(client, "\n");
76
77 ch7006_state_save(client, &priv->saved_state);
78 }
79
ch7006_encoder_restore(struct drm_encoder * encoder)80 static void ch7006_encoder_restore(struct drm_encoder *encoder)
81 {
82 struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
83 struct ch7006_priv *priv = to_ch7006_priv(encoder);
84
85 ch7006_dbg(client, "\n");
86
87 ch7006_state_load(client, &priv->saved_state);
88 }
89
ch7006_encoder_mode_fixup(struct drm_encoder * encoder,struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)90 static bool ch7006_encoder_mode_fixup(struct drm_encoder *encoder,
91 struct drm_display_mode *mode,
92 struct drm_display_mode *adjusted_mode)
93 {
94 struct ch7006_priv *priv = to_ch7006_priv(encoder);
95
96 /* The ch7006 is painfully picky with the input timings so no
97 * custom modes for now... */
98
99 priv->mode = ch7006_lookup_mode(encoder, mode);
100
101 return !!priv->mode;
102 }
103
ch7006_encoder_mode_valid(struct drm_encoder * encoder,struct drm_display_mode * mode)104 static int ch7006_encoder_mode_valid(struct drm_encoder *encoder,
105 struct drm_display_mode *mode)
106 {
107 if (ch7006_lookup_mode(encoder, mode))
108 return MODE_OK;
109 else
110 return MODE_BAD;
111 }
112
ch7006_encoder_mode_set(struct drm_encoder * encoder,struct drm_display_mode * drm_mode,struct drm_display_mode * adjusted_mode)113 static void ch7006_encoder_mode_set(struct drm_encoder *encoder,
114 struct drm_display_mode *drm_mode,
115 struct drm_display_mode *adjusted_mode)
116 {
117 struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
118 struct ch7006_priv *priv = to_ch7006_priv(encoder);
119 struct ch7006_encoder_params *params = &priv->params;
120 struct ch7006_state *state = &priv->state;
121 uint8_t *regs = state->regs;
122 struct ch7006_mode *mode = priv->mode;
123 struct ch7006_tv_norm_info *norm = &ch7006_tv_norms[priv->norm];
124 int start_active;
125
126 ch7006_dbg(client, "\n");
127
128 regs[CH7006_DISPMODE] = norm->dispmode | mode->dispmode;
129 regs[CH7006_BWIDTH] = 0;
130 regs[CH7006_INPUT_FORMAT] = bitf(CH7006_INPUT_FORMAT_FORMAT,
131 params->input_format);
132
133 regs[CH7006_CLKMODE] = CH7006_CLKMODE_SUBC_LOCK
134 | bitf(CH7006_CLKMODE_XCM, params->xcm)
135 | bitf(CH7006_CLKMODE_PCM, params->pcm);
136 if (params->clock_mode)
137 regs[CH7006_CLKMODE] |= CH7006_CLKMODE_MASTER;
138 if (params->clock_edge)
139 regs[CH7006_CLKMODE] |= CH7006_CLKMODE_POS_EDGE;
140
141 start_active = (drm_mode->htotal & ~0x7) - (drm_mode->hsync_start & ~0x7);
142 regs[CH7006_POV] = bitf(CH7006_POV_START_ACTIVE_8, start_active);
143 regs[CH7006_START_ACTIVE] = bitf(CH7006_START_ACTIVE_0, start_active);
144
145 regs[CH7006_INPUT_SYNC] = 0;
146 if (params->sync_direction)
147 regs[CH7006_INPUT_SYNC] |= CH7006_INPUT_SYNC_OUTPUT;
148 if (params->sync_encoding)
149 regs[CH7006_INPUT_SYNC] |= CH7006_INPUT_SYNC_EMBEDDED;
150 if (drm_mode->flags & DRM_MODE_FLAG_PVSYNC)
151 regs[CH7006_INPUT_SYNC] |= CH7006_INPUT_SYNC_PVSYNC;
152 if (drm_mode->flags & DRM_MODE_FLAG_PHSYNC)
153 regs[CH7006_INPUT_SYNC] |= CH7006_INPUT_SYNC_PHSYNC;
154
155 regs[CH7006_DETECT] = 0;
156 regs[CH7006_BCLKOUT] = 0;
157
158 regs[CH7006_SUBC_INC3] = 0;
159 if (params->pout_level)
160 regs[CH7006_SUBC_INC3] |= CH7006_SUBC_INC3_POUT_3_3V;
161
162 regs[CH7006_SUBC_INC4] = 0;
163 if (params->active_detect)
164 regs[CH7006_SUBC_INC4] |= CH7006_SUBC_INC4_DS_INPUT;
165
166 regs[CH7006_PLL_CONTROL] = priv->saved_state.regs[CH7006_PLL_CONTROL];
167
168 ch7006_setup_levels(encoder);
169 ch7006_setup_subcarrier(encoder);
170 ch7006_setup_pll(encoder);
171 ch7006_setup_power_state(encoder);
172 ch7006_setup_properties(encoder);
173
174 ch7006_state_load(client, state);
175 }
176
ch7006_encoder_detect(struct drm_encoder * encoder,struct drm_connector * connector)177 static enum drm_connector_status ch7006_encoder_detect(struct drm_encoder *encoder,
178 struct drm_connector *connector)
179 {
180 struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
181 struct ch7006_priv *priv = to_ch7006_priv(encoder);
182 struct ch7006_state *state = &priv->state;
183 int det;
184
185 ch7006_dbg(client, "\n");
186
187 ch7006_save_reg(client, state, CH7006_DETECT);
188 ch7006_save_reg(client, state, CH7006_POWER);
189 ch7006_save_reg(client, state, CH7006_CLKMODE);
190
191 ch7006_write(client, CH7006_POWER, CH7006_POWER_RESET |
192 bitfs(CH7006_POWER_LEVEL, NORMAL));
193 ch7006_write(client, CH7006_CLKMODE, CH7006_CLKMODE_MASTER);
194
195 ch7006_write(client, CH7006_DETECT, CH7006_DETECT_SENSE);
196
197 ch7006_write(client, CH7006_DETECT, 0);
198
199 det = ch7006_read(client, CH7006_DETECT);
200
201 ch7006_load_reg(client, state, CH7006_CLKMODE);
202 ch7006_load_reg(client, state, CH7006_POWER);
203 ch7006_load_reg(client, state, CH7006_DETECT);
204
205 if ((det & (CH7006_DETECT_SVIDEO_Y_TEST|
206 CH7006_DETECT_SVIDEO_C_TEST|
207 CH7006_DETECT_CVBS_TEST)) == 0)
208 priv->subconnector = DRM_MODE_SUBCONNECTOR_SCART;
209 else if ((det & (CH7006_DETECT_SVIDEO_Y_TEST|
210 CH7006_DETECT_SVIDEO_C_TEST)) == 0)
211 priv->subconnector = DRM_MODE_SUBCONNECTOR_SVIDEO;
212 else if ((det & CH7006_DETECT_CVBS_TEST) == 0)
213 priv->subconnector = DRM_MODE_SUBCONNECTOR_Composite;
214 else
215 priv->subconnector = DRM_MODE_SUBCONNECTOR_Unknown;
216
217 drm_connector_property_set_value(connector,
218 encoder->dev->mode_config.tv_subconnector_property,
219 priv->subconnector);
220
221 return priv->subconnector ? connector_status_connected :
222 connector_status_disconnected;
223 }
224
ch7006_encoder_get_modes(struct drm_encoder * encoder,struct drm_connector * connector)225 static int ch7006_encoder_get_modes(struct drm_encoder *encoder,
226 struct drm_connector *connector)
227 {
228 struct ch7006_priv *priv = to_ch7006_priv(encoder);
229 struct ch7006_mode *mode;
230 int n = 0;
231
232 for (mode = ch7006_modes; mode->mode.clock; mode++) {
233 if (~mode->valid_scales & 1<<priv->scale ||
234 ~mode->valid_norms & 1<<priv->norm)
235 continue;
236
237 drm_mode_probed_add(connector,
238 drm_mode_duplicate(encoder->dev, &mode->mode));
239
240 n++;
241 }
242
243 return n;
244 }
245
ch7006_encoder_create_resources(struct drm_encoder * encoder,struct drm_connector * connector)246 static int ch7006_encoder_create_resources(struct drm_encoder *encoder,
247 struct drm_connector *connector)
248 {
249 struct ch7006_priv *priv = to_ch7006_priv(encoder);
250 struct drm_device *dev = encoder->dev;
251 struct drm_mode_config *conf = &dev->mode_config;
252
253 drm_mode_create_tv_properties(dev, NUM_TV_NORMS, ch7006_tv_norm_names);
254
255 priv->scale_property = drm_property_create(dev, DRM_MODE_PROP_RANGE,
256 "scale", 2);
257 priv->scale_property->values[0] = 0;
258 priv->scale_property->values[1] = 2;
259
260 drm_connector_attach_property(connector, conf->tv_select_subconnector_property,
261 priv->select_subconnector);
262 drm_connector_attach_property(connector, conf->tv_subconnector_property,
263 priv->subconnector);
264 drm_connector_attach_property(connector, conf->tv_left_margin_property,
265 priv->hmargin);
266 drm_connector_attach_property(connector, conf->tv_bottom_margin_property,
267 priv->vmargin);
268 drm_connector_attach_property(connector, conf->tv_mode_property,
269 priv->norm);
270 drm_connector_attach_property(connector, conf->tv_brightness_property,
271 priv->brightness);
272 drm_connector_attach_property(connector, conf->tv_contrast_property,
273 priv->contrast);
274 drm_connector_attach_property(connector, conf->tv_flicker_reduction_property,
275 priv->flicker);
276 drm_connector_attach_property(connector, priv->scale_property,
277 priv->scale);
278
279 return 0;
280 }
281
ch7006_encoder_set_property(struct drm_encoder * encoder,struct drm_connector * connector,struct drm_property * property,uint64_t val)282 static int ch7006_encoder_set_property(struct drm_encoder *encoder,
283 struct drm_connector *connector,
284 struct drm_property *property,
285 uint64_t val)
286 {
287 struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
288 struct ch7006_priv *priv = to_ch7006_priv(encoder);
289 struct ch7006_state *state = &priv->state;
290 struct drm_mode_config *conf = &encoder->dev->mode_config;
291 struct drm_crtc *crtc = encoder->crtc;
292 bool modes_changed = false;
293
294 ch7006_dbg(client, "\n");
295
296 if (property == conf->tv_select_subconnector_property) {
297 priv->select_subconnector = val;
298
299 ch7006_setup_power_state(encoder);
300
301 ch7006_load_reg(client, state, CH7006_POWER);
302
303 } else if (property == conf->tv_left_margin_property) {
304 priv->hmargin = val;
305
306 ch7006_setup_properties(encoder);
307
308 ch7006_load_reg(client, state, CH7006_POV);
309 ch7006_load_reg(client, state, CH7006_HPOS);
310
311 } else if (property == conf->tv_bottom_margin_property) {
312 priv->vmargin = val;
313
314 ch7006_setup_properties(encoder);
315
316 ch7006_load_reg(client, state, CH7006_POV);
317 ch7006_load_reg(client, state, CH7006_VPOS);
318
319 } else if (property == conf->tv_mode_property) {
320 if (connector->dpms != DRM_MODE_DPMS_OFF)
321 return -EINVAL;
322
323 priv->norm = val;
324
325 modes_changed = true;
326
327 } else if (property == conf->tv_brightness_property) {
328 priv->brightness = val;
329
330 ch7006_setup_levels(encoder);
331
332 ch7006_load_reg(client, state, CH7006_BLACK_LEVEL);
333
334 } else if (property == conf->tv_contrast_property) {
335 priv->contrast = val;
336
337 ch7006_setup_properties(encoder);
338
339 ch7006_load_reg(client, state, CH7006_CONTRAST);
340
341 } else if (property == conf->tv_flicker_reduction_property) {
342 priv->flicker = val;
343
344 ch7006_setup_properties(encoder);
345
346 ch7006_load_reg(client, state, CH7006_FFILTER);
347
348 } else if (property == priv->scale_property) {
349 if (connector->dpms != DRM_MODE_DPMS_OFF)
350 return -EINVAL;
351
352 priv->scale = val;
353
354 modes_changed = true;
355
356 } else {
357 return -EINVAL;
358 }
359
360 if (modes_changed) {
361 drm_helper_probe_single_connector_modes(connector, 0, 0);
362
363 /* Disable the crtc to ensure a full modeset is
364 * performed whenever it's turned on again. */
365 if (crtc) {
366 struct drm_mode_set modeset = {
367 .crtc = crtc,
368 };
369
370 crtc->funcs->set_config(&modeset);
371 }
372 }
373
374 return 0;
375 }
376
377 static struct drm_encoder_slave_funcs ch7006_encoder_funcs = {
378 .set_config = ch7006_encoder_set_config,
379 .destroy = ch7006_encoder_destroy,
380 .dpms = ch7006_encoder_dpms,
381 .save = ch7006_encoder_save,
382 .restore = ch7006_encoder_restore,
383 .mode_fixup = ch7006_encoder_mode_fixup,
384 .mode_valid = ch7006_encoder_mode_valid,
385 .mode_set = ch7006_encoder_mode_set,
386 .detect = ch7006_encoder_detect,
387 .get_modes = ch7006_encoder_get_modes,
388 .create_resources = ch7006_encoder_create_resources,
389 .set_property = ch7006_encoder_set_property,
390 };
391
392
393 /* I2C driver functions */
394
ch7006_probe(struct i2c_client * client,const struct i2c_device_id * id)395 static int ch7006_probe(struct i2c_client *client, const struct i2c_device_id *id)
396 {
397 uint8_t addr = CH7006_VERSION_ID;
398 uint8_t val;
399 int ret;
400
401 ch7006_dbg(client, "\n");
402
403 ret = i2c_master_send(client, &addr, sizeof(addr));
404 if (ret < 0)
405 goto fail;
406
407 ret = i2c_master_recv(client, &val, sizeof(val));
408 if (ret < 0)
409 goto fail;
410
411 ch7006_info(client, "Detected version ID: %x\n", val);
412
413 /* I don't know what this is for, but otherwise I get no
414 * signal.
415 */
416 ch7006_write(client, 0x3d, 0x0);
417
418 return 0;
419
420 fail:
421 ch7006_err(client, "Error %d reading version ID\n", ret);
422
423 return -ENODEV;
424 }
425
ch7006_remove(struct i2c_client * client)426 static int ch7006_remove(struct i2c_client *client)
427 {
428 ch7006_dbg(client, "\n");
429
430 return 0;
431 }
432
ch7006_suspend(struct i2c_client * client,pm_message_t mesg)433 static int ch7006_suspend(struct i2c_client *client, pm_message_t mesg)
434 {
435 ch7006_dbg(client, "\n");
436
437 return 0;
438 }
439
ch7006_resume(struct i2c_client * client)440 static int ch7006_resume(struct i2c_client *client)
441 {
442 ch7006_dbg(client, "\n");
443
444 ch7006_write(client, 0x3d, 0x0);
445
446 return 0;
447 }
448
ch7006_encoder_init(struct i2c_client * client,struct drm_device * dev,struct drm_encoder_slave * encoder)449 static int ch7006_encoder_init(struct i2c_client *client,
450 struct drm_device *dev,
451 struct drm_encoder_slave *encoder)
452 {
453 struct ch7006_priv *priv;
454 int i;
455
456 ch7006_dbg(client, "\n");
457
458 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
459 if (!priv)
460 return -ENOMEM;
461
462 encoder->slave_priv = priv;
463 encoder->slave_funcs = &ch7006_encoder_funcs;
464
465 priv->norm = TV_NORM_PAL;
466 priv->select_subconnector = DRM_MODE_SUBCONNECTOR_Automatic;
467 priv->subconnector = DRM_MODE_SUBCONNECTOR_Unknown;
468 priv->scale = 1;
469 priv->contrast = 50;
470 priv->brightness = 50;
471 priv->flicker = 50;
472 priv->hmargin = 50;
473 priv->vmargin = 50;
474 priv->last_dpms = -1;
475 priv->chip_version = ch7006_read(client, CH7006_VERSION_ID);
476
477 if (ch7006_tv_norm) {
478 for (i = 0; i < NUM_TV_NORMS; i++) {
479 if (!strcmp(ch7006_tv_norm_names[i], ch7006_tv_norm)) {
480 priv->norm = i;
481 break;
482 }
483 }
484
485 if (i == NUM_TV_NORMS)
486 ch7006_err(client, "Invalid TV norm setting \"%s\".\n",
487 ch7006_tv_norm);
488 }
489
490 if (ch7006_scale >= 0 && ch7006_scale <= 2)
491 priv->scale = ch7006_scale;
492 else
493 ch7006_err(client, "Invalid scale setting \"%d\".\n",
494 ch7006_scale);
495
496 return 0;
497 }
498
499 static struct i2c_device_id ch7006_ids[] = {
500 { "ch7006", 0 },
501 { }
502 };
503 MODULE_DEVICE_TABLE(i2c, ch7006_ids);
504
505 static struct drm_i2c_encoder_driver ch7006_driver = {
506 .i2c_driver = {
507 .probe = ch7006_probe,
508 .remove = ch7006_remove,
509 .suspend = ch7006_suspend,
510 .resume = ch7006_resume,
511
512 .driver = {
513 .name = "ch7006",
514 },
515
516 .id_table = ch7006_ids,
517 },
518
519 .encoder_init = ch7006_encoder_init,
520 };
521
522
523 /* Module initialization */
524
ch7006_init(void)525 static int __init ch7006_init(void)
526 {
527 return drm_i2c_encoder_register(THIS_MODULE, &ch7006_driver);
528 }
529
ch7006_exit(void)530 static void __exit ch7006_exit(void)
531 {
532 drm_i2c_encoder_unregister(&ch7006_driver);
533 }
534
535 int ch7006_debug;
536 module_param_named(debug, ch7006_debug, int, 0600);
537 MODULE_PARM_DESC(debug, "Enable debug output.");
538
539 char *ch7006_tv_norm;
540 module_param_named(tv_norm, ch7006_tv_norm, charp, 0600);
541 MODULE_PARM_DESC(tv_norm, "Default TV norm.\n"
542 "\t\tSupported: PAL, PAL-M, PAL-N, PAL-Nc, PAL-60, NTSC-M, NTSC-J.\n"
543 "\t\tDefault: PAL");
544
545 int ch7006_scale = 1;
546 module_param_named(scale, ch7006_scale, int, 0600);
547 MODULE_PARM_DESC(scale, "Default scale.\n"
548 "\t\tSupported: 0 -> Select video modes with a higher blanking ratio.\n"
549 "\t\t\t1 -> Select default video modes.\n"
550 "\t\t\t2 -> Select video modes with a lower blanking ratio.");
551
552 MODULE_AUTHOR("Francisco Jerez <currojerez@riseup.net>");
553 MODULE_DESCRIPTION("Chrontel ch7006 TV encoder driver");
554 MODULE_LICENSE("GPL and additional rights");
555
556 module_init(ch7006_init);
557 module_exit(ch7006_exit);
558