1 /* $NetBSD: ch7006_drv.c,v 1.3 2021/12/18 23:45:27 riastradh Exp $ */
2
3 /*
4 * Copyright (C) 2009 Francisco Jerez.
5 * All Rights Reserved.
6 *
7 * Permission is hereby granted, free of charge, to any person obtaining
8 * a 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, sublicense, 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
17 * portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
20 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
22 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
23 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
24 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
25 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 *
27 */
28
29 #include <sys/cdefs.h>
30 __KERNEL_RCSID(0, "$NetBSD: ch7006_drv.c,v 1.3 2021/12/18 23:45:27 riastradh Exp $");
31
32 #include <linux/module.h>
33
34 #include "ch7006_priv.h"
35
36 /* DRM encoder functions */
37
ch7006_encoder_set_config(struct drm_encoder * encoder,void * params)38 static void ch7006_encoder_set_config(struct drm_encoder *encoder,
39 void *params)
40 {
41 struct ch7006_priv *priv = to_ch7006_priv(encoder);
42
43 priv->params = *(struct ch7006_encoder_params *)params;
44 }
45
ch7006_encoder_destroy(struct drm_encoder * encoder)46 static void ch7006_encoder_destroy(struct drm_encoder *encoder)
47 {
48 struct ch7006_priv *priv = to_ch7006_priv(encoder);
49
50 drm_property_destroy(encoder->dev, priv->scale_property);
51
52 kfree(priv);
53 to_encoder_slave(encoder)->slave_priv = NULL;
54
55 drm_i2c_encoder_destroy(encoder);
56 }
57
ch7006_encoder_dpms(struct drm_encoder * encoder,int mode)58 static void ch7006_encoder_dpms(struct drm_encoder *encoder, int mode)
59 {
60 struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
61 struct ch7006_priv *priv = to_ch7006_priv(encoder);
62 struct ch7006_state *state = &priv->state;
63
64 ch7006_dbg(client, "\n");
65
66 if (mode == priv->last_dpms)
67 return;
68 priv->last_dpms = mode;
69
70 ch7006_setup_power_state(encoder);
71
72 ch7006_load_reg(client, state, CH7006_POWER);
73 }
74
ch7006_encoder_save(struct drm_encoder * encoder)75 static void ch7006_encoder_save(struct drm_encoder *encoder)
76 {
77 struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
78 struct ch7006_priv *priv = to_ch7006_priv(encoder);
79
80 ch7006_dbg(client, "\n");
81
82 ch7006_state_save(client, &priv->saved_state);
83 }
84
ch7006_encoder_restore(struct drm_encoder * encoder)85 static void ch7006_encoder_restore(struct drm_encoder *encoder)
86 {
87 struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
88 struct ch7006_priv *priv = to_ch7006_priv(encoder);
89
90 ch7006_dbg(client, "\n");
91
92 ch7006_state_load(client, &priv->saved_state);
93 }
94
ch7006_encoder_mode_fixup(struct drm_encoder * encoder,const struct drm_display_mode * mode,struct drm_display_mode * adjusted_mode)95 static bool ch7006_encoder_mode_fixup(struct drm_encoder *encoder,
96 const struct drm_display_mode *mode,
97 struct drm_display_mode *adjusted_mode)
98 {
99 struct ch7006_priv *priv = to_ch7006_priv(encoder);
100
101 /* The ch7006 is painfully picky with the input timings so no
102 * custom modes for now... */
103
104 priv->mode = ch7006_lookup_mode(encoder, mode);
105
106 return !!priv->mode;
107 }
108
ch7006_encoder_mode_valid(struct drm_encoder * encoder,struct drm_display_mode * mode)109 static int ch7006_encoder_mode_valid(struct drm_encoder *encoder,
110 struct drm_display_mode *mode)
111 {
112 if (ch7006_lookup_mode(encoder, mode))
113 return MODE_OK;
114 else
115 return MODE_BAD;
116 }
117
ch7006_encoder_mode_set(struct drm_encoder * encoder,struct drm_display_mode * drm_mode,struct drm_display_mode * adjusted_mode)118 static void ch7006_encoder_mode_set(struct drm_encoder *encoder,
119 struct drm_display_mode *drm_mode,
120 struct drm_display_mode *adjusted_mode)
121 {
122 struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
123 struct ch7006_priv *priv = to_ch7006_priv(encoder);
124 struct ch7006_encoder_params *params = &priv->params;
125 struct ch7006_state *state = &priv->state;
126 uint8_t *regs = state->regs;
127 const struct ch7006_mode *mode = priv->mode;
128 const struct ch7006_tv_norm_info *norm = &ch7006_tv_norms[priv->norm];
129 int start_active;
130
131 ch7006_dbg(client, "\n");
132
133 regs[CH7006_DISPMODE] = norm->dispmode | mode->dispmode;
134 regs[CH7006_BWIDTH] = 0;
135 regs[CH7006_INPUT_FORMAT] = bitf(CH7006_INPUT_FORMAT_FORMAT,
136 params->input_format);
137
138 regs[CH7006_CLKMODE] = CH7006_CLKMODE_SUBC_LOCK
139 | bitf(CH7006_CLKMODE_XCM, params->xcm)
140 | bitf(CH7006_CLKMODE_PCM, params->pcm);
141 if (params->clock_mode)
142 regs[CH7006_CLKMODE] |= CH7006_CLKMODE_MASTER;
143 if (params->clock_edge)
144 regs[CH7006_CLKMODE] |= CH7006_CLKMODE_POS_EDGE;
145
146 start_active = (drm_mode->htotal & ~0x7) - (drm_mode->hsync_start & ~0x7);
147 regs[CH7006_POV] = bitf(CH7006_POV_START_ACTIVE_8, start_active);
148 regs[CH7006_START_ACTIVE] = bitf(CH7006_START_ACTIVE_0, start_active);
149
150 regs[CH7006_INPUT_SYNC] = 0;
151 if (params->sync_direction)
152 regs[CH7006_INPUT_SYNC] |= CH7006_INPUT_SYNC_OUTPUT;
153 if (params->sync_encoding)
154 regs[CH7006_INPUT_SYNC] |= CH7006_INPUT_SYNC_EMBEDDED;
155 if (drm_mode->flags & DRM_MODE_FLAG_PVSYNC)
156 regs[CH7006_INPUT_SYNC] |= CH7006_INPUT_SYNC_PVSYNC;
157 if (drm_mode->flags & DRM_MODE_FLAG_PHSYNC)
158 regs[CH7006_INPUT_SYNC] |= CH7006_INPUT_SYNC_PHSYNC;
159
160 regs[CH7006_DETECT] = 0;
161 regs[CH7006_BCLKOUT] = 0;
162
163 regs[CH7006_SUBC_INC3] = 0;
164 if (params->pout_level)
165 regs[CH7006_SUBC_INC3] |= CH7006_SUBC_INC3_POUT_3_3V;
166
167 regs[CH7006_SUBC_INC4] = 0;
168 if (params->active_detect)
169 regs[CH7006_SUBC_INC4] |= CH7006_SUBC_INC4_DS_INPUT;
170
171 regs[CH7006_PLL_CONTROL] = priv->saved_state.regs[CH7006_PLL_CONTROL];
172
173 ch7006_setup_levels(encoder);
174 ch7006_setup_subcarrier(encoder);
175 ch7006_setup_pll(encoder);
176 ch7006_setup_power_state(encoder);
177 ch7006_setup_properties(encoder);
178
179 ch7006_state_load(client, state);
180 }
181
ch7006_encoder_detect(struct drm_encoder * encoder,struct drm_connector * connector)182 static enum drm_connector_status ch7006_encoder_detect(struct drm_encoder *encoder,
183 struct drm_connector *connector)
184 {
185 struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
186 struct ch7006_priv *priv = to_ch7006_priv(encoder);
187 struct ch7006_state *state = &priv->state;
188 int det;
189
190 ch7006_dbg(client, "\n");
191
192 ch7006_save_reg(client, state, CH7006_DETECT);
193 ch7006_save_reg(client, state, CH7006_POWER);
194 ch7006_save_reg(client, state, CH7006_CLKMODE);
195
196 ch7006_write(client, CH7006_POWER, CH7006_POWER_RESET |
197 bitfs(CH7006_POWER_LEVEL, NORMAL));
198 ch7006_write(client, CH7006_CLKMODE, CH7006_CLKMODE_MASTER);
199
200 ch7006_write(client, CH7006_DETECT, CH7006_DETECT_SENSE);
201
202 ch7006_write(client, CH7006_DETECT, 0);
203
204 det = ch7006_read(client, CH7006_DETECT);
205
206 ch7006_load_reg(client, state, CH7006_CLKMODE);
207 ch7006_load_reg(client, state, CH7006_POWER);
208 ch7006_load_reg(client, state, CH7006_DETECT);
209
210 if ((det & (CH7006_DETECT_SVIDEO_Y_TEST|
211 CH7006_DETECT_SVIDEO_C_TEST|
212 CH7006_DETECT_CVBS_TEST)) == 0)
213 priv->subconnector = DRM_MODE_SUBCONNECTOR_SCART;
214 else if ((det & (CH7006_DETECT_SVIDEO_Y_TEST|
215 CH7006_DETECT_SVIDEO_C_TEST)) == 0)
216 priv->subconnector = DRM_MODE_SUBCONNECTOR_SVIDEO;
217 else if ((det & CH7006_DETECT_CVBS_TEST) == 0)
218 priv->subconnector = DRM_MODE_SUBCONNECTOR_Composite;
219 else
220 priv->subconnector = DRM_MODE_SUBCONNECTOR_Unknown;
221
222 drm_object_property_set_value(&connector->base,
223 encoder->dev->mode_config.tv_subconnector_property,
224 priv->subconnector);
225
226 return priv->subconnector ? connector_status_connected :
227 connector_status_disconnected;
228 }
229
ch7006_encoder_get_modes(struct drm_encoder * encoder,struct drm_connector * connector)230 static int ch7006_encoder_get_modes(struct drm_encoder *encoder,
231 struct drm_connector *connector)
232 {
233 struct ch7006_priv *priv = to_ch7006_priv(encoder);
234 const struct ch7006_mode *mode;
235 int n = 0;
236
237 for (mode = ch7006_modes; mode->mode.clock; mode++) {
238 if (~mode->valid_scales & 1<<priv->scale ||
239 ~mode->valid_norms & 1<<priv->norm)
240 continue;
241
242 drm_mode_probed_add(connector,
243 drm_mode_duplicate(encoder->dev, &mode->mode));
244
245 n++;
246 }
247
248 return n;
249 }
250
ch7006_encoder_create_resources(struct drm_encoder * encoder,struct drm_connector * connector)251 static int ch7006_encoder_create_resources(struct drm_encoder *encoder,
252 struct drm_connector *connector)
253 {
254 struct ch7006_priv *priv = to_ch7006_priv(encoder);
255 struct drm_device *dev = encoder->dev;
256 struct drm_mode_config *conf = &dev->mode_config;
257
258 drm_mode_create_tv_properties(dev, NUM_TV_NORMS, ch7006_tv_norm_names);
259
260 priv->scale_property = drm_property_create_range(dev, 0, "scale", 0, 2);
261 if (!priv->scale_property)
262 return -ENOMEM;
263
264 drm_object_attach_property(&connector->base, conf->tv_select_subconnector_property,
265 priv->select_subconnector);
266 drm_object_attach_property(&connector->base, conf->tv_subconnector_property,
267 priv->subconnector);
268 drm_object_attach_property(&connector->base, conf->tv_left_margin_property,
269 priv->hmargin);
270 drm_object_attach_property(&connector->base, conf->tv_bottom_margin_property,
271 priv->vmargin);
272 drm_object_attach_property(&connector->base, conf->tv_mode_property,
273 priv->norm);
274 drm_object_attach_property(&connector->base, conf->tv_brightness_property,
275 priv->brightness);
276 drm_object_attach_property(&connector->base, conf->tv_contrast_property,
277 priv->contrast);
278 drm_object_attach_property(&connector->base, conf->tv_flicker_reduction_property,
279 priv->flicker);
280 drm_object_attach_property(&connector->base, priv->scale_property,
281 priv->scale);
282
283 return 0;
284 }
285
ch7006_encoder_set_property(struct drm_encoder * encoder,struct drm_connector * connector,struct drm_property * property,uint64_t val)286 static int ch7006_encoder_set_property(struct drm_encoder *encoder,
287 struct drm_connector *connector,
288 struct drm_property *property,
289 uint64_t val)
290 {
291 struct i2c_client *client = drm_i2c_encoder_get_client(encoder);
292 struct ch7006_priv *priv = to_ch7006_priv(encoder);
293 struct ch7006_state *state = &priv->state;
294 struct drm_mode_config *conf = &encoder->dev->mode_config;
295 struct drm_crtc *crtc = encoder->crtc;
296 bool modes_changed = false;
297
298 ch7006_dbg(client, "\n");
299
300 if (property == conf->tv_select_subconnector_property) {
301 priv->select_subconnector = val;
302
303 ch7006_setup_power_state(encoder);
304
305 ch7006_load_reg(client, state, CH7006_POWER);
306
307 } else if (property == conf->tv_left_margin_property) {
308 priv->hmargin = val;
309
310 ch7006_setup_properties(encoder);
311
312 ch7006_load_reg(client, state, CH7006_POV);
313 ch7006_load_reg(client, state, CH7006_HPOS);
314
315 } else if (property == conf->tv_bottom_margin_property) {
316 priv->vmargin = val;
317
318 ch7006_setup_properties(encoder);
319
320 ch7006_load_reg(client, state, CH7006_POV);
321 ch7006_load_reg(client, state, CH7006_VPOS);
322
323 } else if (property == conf->tv_mode_property) {
324 if (connector->dpms != DRM_MODE_DPMS_OFF)
325 return -EINVAL;
326
327 priv->norm = val;
328
329 modes_changed = true;
330
331 } else if (property == conf->tv_brightness_property) {
332 priv->brightness = val;
333
334 ch7006_setup_levels(encoder);
335
336 ch7006_load_reg(client, state, CH7006_BLACK_LEVEL);
337
338 } else if (property == conf->tv_contrast_property) {
339 priv->contrast = val;
340
341 ch7006_setup_properties(encoder);
342
343 ch7006_load_reg(client, state, CH7006_CONTRAST);
344
345 } else if (property == conf->tv_flicker_reduction_property) {
346 priv->flicker = val;
347
348 ch7006_setup_properties(encoder);
349
350 ch7006_load_reg(client, state, CH7006_FFILTER);
351
352 } else if (property == priv->scale_property) {
353 if (connector->dpms != DRM_MODE_DPMS_OFF)
354 return -EINVAL;
355
356 priv->scale = val;
357
358 modes_changed = true;
359
360 } else {
361 return -EINVAL;
362 }
363
364 if (modes_changed) {
365 drm_helper_probe_single_connector_modes(connector, 0, 0);
366
367 if (crtc)
368 drm_crtc_helper_set_mode(crtc, &crtc->mode,
369 crtc->x, crtc->y,
370 crtc->primary->fb);
371 }
372
373 return 0;
374 }
375
376 static const struct drm_encoder_slave_funcs ch7006_encoder_funcs = {
377 .set_config = ch7006_encoder_set_config,
378 .destroy = ch7006_encoder_destroy,
379 .dpms = ch7006_encoder_dpms,
380 .save = ch7006_encoder_save,
381 .restore = ch7006_encoder_restore,
382 .mode_fixup = ch7006_encoder_mode_fixup,
383 .mode_valid = ch7006_encoder_mode_valid,
384 .mode_set = ch7006_encoder_mode_set,
385 .detect = ch7006_encoder_detect,
386 .get_modes = ch7006_encoder_get_modes,
387 .create_resources = ch7006_encoder_create_resources,
388 .set_property = ch7006_encoder_set_property,
389 };
390
391
392 /* I2C driver functions */
393
ch7006_probe(struct i2c_client * client,const struct i2c_device_id * id)394 static int ch7006_probe(struct i2c_client *client, const struct i2c_device_id *id)
395 {
396 uint8_t addr = CH7006_VERSION_ID;
397 uint8_t val;
398 int ret;
399
400 ch7006_dbg(client, "\n");
401
402 ret = i2c_master_send(client, &addr, sizeof(addr));
403 if (ret < 0)
404 goto fail;
405
406 ret = i2c_master_recv(client, &val, sizeof(val));
407 if (ret < 0)
408 goto fail;
409
410 ch7006_info(client, "Detected version ID: %x\n", val);
411
412 /* I don't know what this is for, but otherwise I get no
413 * signal.
414 */
415 ch7006_write(client, 0x3d, 0x0);
416
417 return 0;
418
419 fail:
420 ch7006_err(client, "Error %d reading version ID\n", ret);
421
422 return -ENODEV;
423 }
424
ch7006_remove(struct i2c_client * client)425 static int ch7006_remove(struct i2c_client *client)
426 {
427 ch7006_dbg(client, "\n");
428
429 return 0;
430 }
431
ch7006_resume(struct device * dev)432 static int ch7006_resume(struct device *dev)
433 {
434 struct i2c_client *client = to_i2c_client(dev);
435
436 ch7006_dbg(client, "\n");
437
438 ch7006_write(client, 0x3d, 0x0);
439
440 return 0;
441 }
442
ch7006_encoder_init(struct i2c_client * client,struct drm_device * dev,struct drm_encoder_slave * encoder)443 static int ch7006_encoder_init(struct i2c_client *client,
444 struct drm_device *dev,
445 struct drm_encoder_slave *encoder)
446 {
447 struct ch7006_priv *priv;
448 int i;
449
450 ch7006_dbg(client, "\n");
451
452 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
453 if (!priv)
454 return -ENOMEM;
455
456 encoder->slave_priv = priv;
457 encoder->slave_funcs = &ch7006_encoder_funcs;
458
459 priv->norm = TV_NORM_PAL;
460 priv->select_subconnector = DRM_MODE_SUBCONNECTOR_Automatic;
461 priv->subconnector = DRM_MODE_SUBCONNECTOR_Unknown;
462 priv->scale = 1;
463 priv->contrast = 50;
464 priv->brightness = 50;
465 priv->flicker = 50;
466 priv->hmargin = 50;
467 priv->vmargin = 50;
468 priv->last_dpms = -1;
469 priv->chip_version = ch7006_read(client, CH7006_VERSION_ID);
470
471 if (ch7006_tv_norm) {
472 for (i = 0; i < NUM_TV_NORMS; i++) {
473 if (!strcmp(ch7006_tv_norm_names[i], ch7006_tv_norm)) {
474 priv->norm = i;
475 break;
476 }
477 }
478
479 if (i == NUM_TV_NORMS)
480 ch7006_err(client, "Invalid TV norm setting \"%s\".\n",
481 ch7006_tv_norm);
482 }
483
484 if (ch7006_scale >= 0 && ch7006_scale <= 2)
485 priv->scale = ch7006_scale;
486 else
487 ch7006_err(client, "Invalid scale setting \"%d\".\n",
488 ch7006_scale);
489
490 return 0;
491 }
492
493 static const struct i2c_device_id ch7006_ids[] = {
494 { "ch7006", 0 },
495 { }
496 };
497 MODULE_DEVICE_TABLE(i2c, ch7006_ids);
498
499 static const struct dev_pm_ops ch7006_pm_ops = {
500 .resume = ch7006_resume,
501 };
502
503 static struct drm_i2c_encoder_driver ch7006_driver = {
504 .i2c_driver = {
505 .probe = ch7006_probe,
506 .remove = ch7006_remove,
507
508 .driver = {
509 .name = "ch7006",
510 .pm = &ch7006_pm_ops,
511 },
512
513 .id_table = ch7006_ids,
514 },
515
516 .encoder_init = ch7006_encoder_init,
517 };
518
519
520 /* Module initialization */
521
ch7006_init(void)522 static int __init ch7006_init(void)
523 {
524 return drm_i2c_encoder_register(THIS_MODULE, &ch7006_driver);
525 }
526
ch7006_exit(void)527 static void __exit ch7006_exit(void)
528 {
529 drm_i2c_encoder_unregister(&ch7006_driver);
530 }
531
532 int ch7006_debug;
533 module_param_named(debug, ch7006_debug, int, 0600);
534 MODULE_PARM_DESC(debug, "Enable debug output.");
535
536 char *ch7006_tv_norm;
537 module_param_named(tv_norm, ch7006_tv_norm, charp, 0600);
538 MODULE_PARM_DESC(tv_norm, "Default TV norm.\n"
539 "\t\tSupported: PAL, PAL-M, PAL-N, PAL-Nc, PAL-60, NTSC-M, NTSC-J.\n"
540 "\t\tDefault: PAL");
541
542 int ch7006_scale = 1;
543 module_param_named(scale, ch7006_scale, int, 0600);
544 MODULE_PARM_DESC(scale, "Default scale.\n"
545 "\t\tSupported: 0 -> Select video modes with a higher blanking ratio.\n"
546 "\t\t\t1 -> Select default video modes.\n"
547 "\t\t\t2 -> Select video modes with a lower blanking ratio.");
548
549 MODULE_AUTHOR("Francisco Jerez <currojerez@riseup.net>");
550 MODULE_DESCRIPTION("Chrontel ch7006 TV encoder driver");
551 MODULE_LICENSE("GPL and additional rights");
552
553 module_init(ch7006_init);
554 module_exit(ch7006_exit);
555