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,const struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)90 static bool ch7006_encoder_mode_fixup(struct drm_encoder *encoder,
91 const 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 const struct ch7006_mode *mode = priv->mode;
123 const 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_object_property_set_value(&connector->base,
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 const 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_range(dev, 0, "scale", 0, 2);
256 if (!priv->scale_property)
257 return -ENOMEM;
258
259 drm_object_attach_property(&connector->base, conf->tv_select_subconnector_property,
260 priv->select_subconnector);
261 drm_object_attach_property(&connector->base, conf->tv_subconnector_property,
262 priv->subconnector);
263 drm_object_attach_property(&connector->base, conf->tv_left_margin_property,
264 priv->hmargin);
265 drm_object_attach_property(&connector->base, conf->tv_bottom_margin_property,
266 priv->vmargin);
267 drm_object_attach_property(&connector->base, conf->tv_mode_property,
268 priv->norm);
269 drm_object_attach_property(&connector->base, conf->tv_brightness_property,
270 priv->brightness);
271 drm_object_attach_property(&connector->base, conf->tv_contrast_property,
272 priv->contrast);
273 drm_object_attach_property(&connector->base, conf->tv_flicker_reduction_property,
274 priv->flicker);
275 drm_object_attach_property(&connector->base, priv->scale_property,
276 priv->scale);
277
278 return 0;
279 }
280
ch7006_encoder_set_property(struct drm_encoder * encoder,struct drm_connector * connector,struct drm_property * property,uint64_t val)281 static int ch7006_encoder_set_property(struct drm_encoder *encoder,
282 struct drm_connector *connector,
283 struct drm_property *property,
284 uint64_t val)
285 {
286 struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
287 struct ch7006_priv *priv = to_ch7006_priv(encoder);
288 struct ch7006_state *state = &priv->state;
289 struct drm_mode_config *conf = &encoder->dev->mode_config;
290 struct drm_crtc *crtc = encoder->crtc;
291 bool modes_changed = false;
292
293 ch7006_dbg(client, "\n");
294
295 if (property == conf->tv_select_subconnector_property) {
296 priv->select_subconnector = val;
297
298 ch7006_setup_power_state(encoder);
299
300 ch7006_load_reg(client, state, CH7006_POWER);
301
302 } else if (property == conf->tv_left_margin_property) {
303 priv->hmargin = val;
304
305 ch7006_setup_properties(encoder);
306
307 ch7006_load_reg(client, state, CH7006_POV);
308 ch7006_load_reg(client, state, CH7006_HPOS);
309
310 } else if (property == conf->tv_bottom_margin_property) {
311 priv->vmargin = val;
312
313 ch7006_setup_properties(encoder);
314
315 ch7006_load_reg(client, state, CH7006_POV);
316 ch7006_load_reg(client, state, CH7006_VPOS);
317
318 } else if (property == conf->tv_mode_property) {
319 if (connector->dpms != DRM_MODE_DPMS_OFF)
320 return -EINVAL;
321
322 priv->norm = val;
323
324 modes_changed = true;
325
326 } else if (property == conf->tv_brightness_property) {
327 priv->brightness = val;
328
329 ch7006_setup_levels(encoder);
330
331 ch7006_load_reg(client, state, CH7006_BLACK_LEVEL);
332
333 } else if (property == conf->tv_contrast_property) {
334 priv->contrast = val;
335
336 ch7006_setup_properties(encoder);
337
338 ch7006_load_reg(client, state, CH7006_CONTRAST);
339
340 } else if (property == conf->tv_flicker_reduction_property) {
341 priv->flicker = val;
342
343 ch7006_setup_properties(encoder);
344
345 ch7006_load_reg(client, state, CH7006_FFILTER);
346
347 } else if (property == priv->scale_property) {
348 if (connector->dpms != DRM_MODE_DPMS_OFF)
349 return -EINVAL;
350
351 priv->scale = val;
352
353 modes_changed = true;
354
355 } else {
356 return -EINVAL;
357 }
358
359 if (modes_changed) {
360 drm_helper_probe_single_connector_modes(connector, 0, 0);
361
362 if (crtc)
363 drm_crtc_helper_set_mode(crtc, &crtc->mode,
364 crtc->x, crtc->y,
365 crtc->primary->fb);
366 }
367
368 return 0;
369 }
370
371 static const struct drm_encoder_slave_funcs ch7006_encoder_funcs = {
372 .set_config = ch7006_encoder_set_config,
373 .destroy = ch7006_encoder_destroy,
374 .dpms = ch7006_encoder_dpms,
375 .save = ch7006_encoder_save,
376 .restore = ch7006_encoder_restore,
377 .mode_fixup = ch7006_encoder_mode_fixup,
378 .mode_valid = ch7006_encoder_mode_valid,
379 .mode_set = ch7006_encoder_mode_set,
380 .detect = ch7006_encoder_detect,
381 .get_modes = ch7006_encoder_get_modes,
382 .create_resources = ch7006_encoder_create_resources,
383 .set_property = ch7006_encoder_set_property,
384 };
385
386
387 /* I2C driver functions */
388
ch7006_probe(struct i2c_client * client,const struct i2c_device_id * id)389 static int ch7006_probe(struct i2c_client *client, const struct i2c_device_id *id)
390 {
391 uint8_t addr = CH7006_VERSION_ID;
392 uint8_t val;
393 int ret;
394
395 ch7006_dbg(client, "\n");
396
397 ret = i2c_master_send(client, &addr, sizeof(addr));
398 if (ret < 0)
399 goto fail;
400
401 ret = i2c_master_recv(client, &val, sizeof(val));
402 if (ret < 0)
403 goto fail;
404
405 ch7006_info(client, "Detected version ID: %x\n", val);
406
407 /* I don't know what this is for, but otherwise I get no
408 * signal.
409 */
410 ch7006_write(client, 0x3d, 0x0);
411
412 return 0;
413
414 fail:
415 ch7006_err(client, "Error %d reading version ID\n", ret);
416
417 return -ENODEV;
418 }
419
ch7006_remove(struct i2c_client * client)420 static int ch7006_remove(struct i2c_client *client)
421 {
422 ch7006_dbg(client, "\n");
423
424 return 0;
425 }
426
ch7006_resume(struct device * dev)427 static int ch7006_resume(struct device *dev)
428 {
429 struct i2c_client *client = to_i2c_client(dev);
430
431 ch7006_dbg(client, "\n");
432
433 ch7006_write(client, 0x3d, 0x0);
434
435 return 0;
436 }
437
ch7006_encoder_init(struct i2c_client * client,struct drm_device * dev,struct drm_encoder_slave * encoder)438 static int ch7006_encoder_init(struct i2c_client *client,
439 struct drm_device *dev,
440 struct drm_encoder_slave *encoder)
441 {
442 struct ch7006_priv *priv;
443 int i;
444
445 ch7006_dbg(client, "\n");
446
447 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
448 if (!priv)
449 return -ENOMEM;
450
451 encoder->slave_priv = priv;
452 encoder->slave_funcs = &ch7006_encoder_funcs;
453
454 priv->norm = TV_NORM_PAL;
455 priv->select_subconnector = DRM_MODE_SUBCONNECTOR_Automatic;
456 priv->subconnector = DRM_MODE_SUBCONNECTOR_Unknown;
457 priv->scale = 1;
458 priv->contrast = 50;
459 priv->brightness = 50;
460 priv->flicker = 50;
461 priv->hmargin = 50;
462 priv->vmargin = 50;
463 priv->last_dpms = -1;
464 priv->chip_version = ch7006_read(client, CH7006_VERSION_ID);
465
466 if (ch7006_tv_norm) {
467 for (i = 0; i < NUM_TV_NORMS; i++) {
468 if (!strcmp(ch7006_tv_norm_names[i], ch7006_tv_norm)) {
469 priv->norm = i;
470 break;
471 }
472 }
473
474 if (i == NUM_TV_NORMS)
475 ch7006_err(client, "Invalid TV norm setting \"%s\".\n",
476 ch7006_tv_norm);
477 }
478
479 if (ch7006_scale >= 0 && ch7006_scale <= 2)
480 priv->scale = ch7006_scale;
481 else
482 ch7006_err(client, "Invalid scale setting \"%d\".\n",
483 ch7006_scale);
484
485 return 0;
486 }
487
488 static const struct i2c_device_id ch7006_ids[] = {
489 { "ch7006", 0 },
490 { }
491 };
492 MODULE_DEVICE_TABLE(i2c, ch7006_ids);
493
494 static const struct dev_pm_ops ch7006_pm_ops = {
495 .resume = ch7006_resume,
496 };
497
498 static struct drm_i2c_encoder_driver ch7006_driver = {
499 .i2c_driver = {
500 .probe = ch7006_probe,
501 .remove = ch7006_remove,
502
503 .driver = {
504 .name = "ch7006",
505 .pm = &ch7006_pm_ops,
506 },
507
508 .id_table = ch7006_ids,
509 },
510
511 .encoder_init = ch7006_encoder_init,
512 };
513
514
515 /* Module initialization */
516
ch7006_init(void)517 static int __init ch7006_init(void)
518 {
519 return drm_i2c_encoder_register(THIS_MODULE, &ch7006_driver);
520 }
521
ch7006_exit(void)522 static void __exit ch7006_exit(void)
523 {
524 drm_i2c_encoder_unregister(&ch7006_driver);
525 }
526
527 int ch7006_debug;
528 module_param_named(debug, ch7006_debug, int, 0600);
529 MODULE_PARM_DESC(debug, "Enable debug output.");
530
531 char *ch7006_tv_norm;
532 module_param_named(tv_norm, ch7006_tv_norm, charp, 0600);
533 MODULE_PARM_DESC(tv_norm, "Default TV norm.\n"
534 "\t\tSupported: PAL, PAL-M, PAL-N, PAL-Nc, PAL-60, NTSC-M, NTSC-J.\n"
535 "\t\tDefault: PAL");
536
537 int ch7006_scale = 1;
538 module_param_named(scale, ch7006_scale, int, 0600);
539 MODULE_PARM_DESC(scale, "Default scale.\n"
540 "\t\tSupported: 0 -> Select video modes with a higher blanking ratio.\n"
541 "\t\t\t1 -> Select default video modes.\n"
542 "\t\t\t2 -> Select video modes with a lower blanking ratio.");
543
544 MODULE_AUTHOR("Francisco Jerez <currojerez@riseup.net>");
545 MODULE_DESCRIPTION("Chrontel ch7006 TV encoder driver");
546 MODULE_LICENSE("GPL and additional rights");
547
548 module_init(ch7006_init);
549 module_exit(ch7006_exit);
550