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8#include <linux/clk-provider.h>
9#include <linux/clk.h>
10#include <linux/component.h>
11#include <linux/i2c.h>
12#include <linux/module.h>
13#include <linux/platform_device.h>
14#include <linux/regmap.h>
15#include <linux/regulator/consumer.h>
16#include <linux/spinlock.h>
17#include <linux/videodev2.h>
18
19#include <video/imx-ipu-v3.h>
20
21#include <drm/drm_atomic_helper.h>
22#include <drm/drm_fb_helper.h>
23#include <drm/drm_probe_helper.h>
24#include <drm/drm_simple_kms_helper.h>
25
26#include "imx-drm.h"
27
28#define TVE_COM_CONF_REG 0x00
29#define TVE_TVDAC0_CONT_REG 0x28
30#define TVE_TVDAC1_CONT_REG 0x2c
31#define TVE_TVDAC2_CONT_REG 0x30
32#define TVE_CD_CONT_REG 0x34
33#define TVE_INT_CONT_REG 0x64
34#define TVE_STAT_REG 0x68
35#define TVE_TST_MODE_REG 0x6c
36#define TVE_MV_CONT_REG 0xdc
37
38
39#define TVE_SYNC_CH_2_EN BIT(22)
40#define TVE_SYNC_CH_1_EN BIT(21)
41#define TVE_SYNC_CH_0_EN BIT(20)
42#define TVE_TV_OUT_MODE_MASK (0x7 << 12)
43#define TVE_TV_OUT_DISABLE (0x0 << 12)
44#define TVE_TV_OUT_CVBS_0 (0x1 << 12)
45#define TVE_TV_OUT_CVBS_2 (0x2 << 12)
46#define TVE_TV_OUT_CVBS_0_2 (0x3 << 12)
47#define TVE_TV_OUT_SVIDEO_0_1 (0x4 << 12)
48#define TVE_TV_OUT_SVIDEO_0_1_CVBS2_2 (0x5 << 12)
49#define TVE_TV_OUT_YPBPR (0x6 << 12)
50#define TVE_TV_OUT_RGB (0x7 << 12)
51#define TVE_TV_STAND_MASK (0xf << 8)
52#define TVE_TV_STAND_HD_1080P30 (0xc << 8)
53#define TVE_P2I_CONV_EN BIT(7)
54#define TVE_INP_VIDEO_FORM BIT(6)
55#define TVE_INP_YCBCR_422 (0x0 << 6)
56#define TVE_INP_YCBCR_444 (0x1 << 6)
57#define TVE_DATA_SOURCE_MASK (0x3 << 4)
58#define TVE_DATA_SOURCE_BUS1 (0x0 << 4)
59#define TVE_DATA_SOURCE_BUS2 (0x1 << 4)
60#define TVE_DATA_SOURCE_EXT (0x2 << 4)
61#define TVE_DATA_SOURCE_TESTGEN (0x3 << 4)
62#define TVE_IPU_CLK_EN_OFS 3
63#define TVE_IPU_CLK_EN BIT(3)
64#define TVE_DAC_SAMP_RATE_OFS 1
65#define TVE_DAC_SAMP_RATE_WIDTH 2
66#define TVE_DAC_SAMP_RATE_MASK (0x3 << 1)
67#define TVE_DAC_FULL_RATE (0x0 << 1)
68#define TVE_DAC_DIV2_RATE (0x1 << 1)
69#define TVE_DAC_DIV4_RATE (0x2 << 1)
70#define TVE_EN BIT(0)
71
72
73#define TVE_TVDAC_GAIN_MASK (0x3f << 0)
74
75
76#define TVE_CD_CH_2_SM_EN BIT(22)
77#define TVE_CD_CH_1_SM_EN BIT(21)
78#define TVE_CD_CH_0_SM_EN BIT(20)
79#define TVE_CD_CH_2_LM_EN BIT(18)
80#define TVE_CD_CH_1_LM_EN BIT(17)
81#define TVE_CD_CH_0_LM_EN BIT(16)
82#define TVE_CD_CH_2_REF_LVL BIT(10)
83#define TVE_CD_CH_1_REF_LVL BIT(9)
84#define TVE_CD_CH_0_REF_LVL BIT(8)
85#define TVE_CD_EN BIT(0)
86
87
88#define TVE_FRAME_END_IEN BIT(13)
89#define TVE_CD_MON_END_IEN BIT(2)
90#define TVE_CD_SM_IEN BIT(1)
91#define TVE_CD_LM_IEN BIT(0)
92
93
94#define TVE_TVDAC_TEST_MODE_MASK (0x7 << 0)
95
96#define IMX_TVE_DAC_VOLTAGE 2750000
97
98enum {
99 TVE_MODE_TVOUT,
100 TVE_MODE_VGA,
101};
102
103struct imx_tve {
104 struct drm_connector connector;
105 struct drm_encoder encoder;
106 struct device *dev;
107 spinlock_t lock;
108 bool enabled;
109 int mode;
110 int di_hsync_pin;
111 int di_vsync_pin;
112
113 struct regmap *regmap;
114 struct regulator *dac_reg;
115 struct i2c_adapter *ddc;
116 struct clk *clk;
117 struct clk *di_sel_clk;
118 struct clk_hw clk_hw_di;
119 struct clk *di_clk;
120};
121
122static inline struct imx_tve *con_to_tve(struct drm_connector *c)
123{
124 return container_of(c, struct imx_tve, connector);
125}
126
127static inline struct imx_tve *enc_to_tve(struct drm_encoder *e)
128{
129 return container_of(e, struct imx_tve, encoder);
130}
131
132static void tve_lock(void *__tve)
133__acquires(&tve->lock)
134{
135 struct imx_tve *tve = __tve;
136
137 spin_lock(&tve->lock);
138}
139
140static void tve_unlock(void *__tve)
141__releases(&tve->lock)
142{
143 struct imx_tve *tve = __tve;
144
145 spin_unlock(&tve->lock);
146}
147
148static void tve_enable(struct imx_tve *tve)
149{
150 if (!tve->enabled) {
151 tve->enabled = true;
152 clk_prepare_enable(tve->clk);
153 regmap_update_bits(tve->regmap, TVE_COM_CONF_REG,
154 TVE_EN, TVE_EN);
155 }
156
157
158 regmap_write(tve->regmap, TVE_STAT_REG, 0xffffffff);
159
160
161 if (tve->mode == TVE_MODE_VGA)
162 regmap_write(tve->regmap, TVE_INT_CONT_REG, 0);
163 else
164 regmap_write(tve->regmap, TVE_INT_CONT_REG,
165 TVE_CD_SM_IEN |
166 TVE_CD_LM_IEN |
167 TVE_CD_MON_END_IEN);
168}
169
170static void tve_disable(struct imx_tve *tve)
171{
172 if (tve->enabled) {
173 tve->enabled = false;
174 regmap_update_bits(tve->regmap, TVE_COM_CONF_REG, TVE_EN, 0);
175 clk_disable_unprepare(tve->clk);
176 }
177}
178
179static int tve_setup_tvout(struct imx_tve *tve)
180{
181 return -ENOTSUPP;
182}
183
184static int tve_setup_vga(struct imx_tve *tve)
185{
186 unsigned int mask;
187 unsigned int val;
188 int ret;
189
190
191 ret = regmap_update_bits(tve->regmap, TVE_TVDAC0_CONT_REG,
192 TVE_TVDAC_GAIN_MASK, 0x0a);
193 if (ret)
194 return ret;
195
196 ret = regmap_update_bits(tve->regmap, TVE_TVDAC1_CONT_REG,
197 TVE_TVDAC_GAIN_MASK, 0x0a);
198 if (ret)
199 return ret;
200
201 ret = regmap_update_bits(tve->regmap, TVE_TVDAC2_CONT_REG,
202 TVE_TVDAC_GAIN_MASK, 0x0a);
203 if (ret)
204 return ret;
205
206
207 mask = TVE_DATA_SOURCE_MASK | TVE_INP_VIDEO_FORM;
208 val = TVE_DATA_SOURCE_BUS2 | TVE_INP_YCBCR_444;
209 mask |= TVE_TV_STAND_MASK | TVE_P2I_CONV_EN;
210 val |= TVE_TV_STAND_HD_1080P30 | 0;
211 mask |= TVE_TV_OUT_MODE_MASK | TVE_SYNC_CH_0_EN;
212 val |= TVE_TV_OUT_RGB | TVE_SYNC_CH_0_EN;
213 ret = regmap_update_bits(tve->regmap, TVE_COM_CONF_REG, mask, val);
214 if (ret)
215 return ret;
216
217
218 return regmap_update_bits(tve->regmap, TVE_TST_MODE_REG,
219 TVE_TVDAC_TEST_MODE_MASK, 1);
220}
221
222static int imx_tve_connector_get_modes(struct drm_connector *connector)
223{
224 struct imx_tve *tve = con_to_tve(connector);
225 struct edid *edid;
226 int ret = 0;
227
228 if (!tve->ddc)
229 return 0;
230
231 edid = drm_get_edid(connector, tve->ddc);
232 if (edid) {
233 drm_connector_update_edid_property(connector, edid);
234 ret = drm_add_edid_modes(connector, edid);
235 kfree(edid);
236 }
237
238 return ret;
239}
240
241static int imx_tve_connector_mode_valid(struct drm_connector *connector,
242 struct drm_display_mode *mode)
243{
244 struct imx_tve *tve = con_to_tve(connector);
245 unsigned long rate;
246
247
248 rate = clk_round_rate(tve->clk, 2000UL * mode->clock) / 2000;
249 if (rate == mode->clock)
250 return MODE_OK;
251
252
253 rate = clk_round_rate(tve->clk, 1000UL * mode->clock) / 1000;
254 if (rate == mode->clock)
255 return MODE_OK;
256
257 dev_warn(tve->dev, "ignoring mode %dx%d\n",
258 mode->hdisplay, mode->vdisplay);
259
260 return MODE_BAD;
261}
262
263static void imx_tve_encoder_mode_set(struct drm_encoder *encoder,
264 struct drm_display_mode *orig_mode,
265 struct drm_display_mode *mode)
266{
267 struct imx_tve *tve = enc_to_tve(encoder);
268 unsigned long rounded_rate;
269 unsigned long rate;
270 int div = 1;
271 int ret;
272
273
274
275
276
277
278 rate = 2000UL * mode->clock;
279 clk_set_rate(tve->clk, rate);
280 rounded_rate = clk_get_rate(tve->clk);
281 if (rounded_rate >= rate)
282 div = 2;
283 clk_set_rate(tve->di_clk, rounded_rate / div);
284
285 ret = clk_set_parent(tve->di_sel_clk, tve->di_clk);
286 if (ret < 0) {
287 dev_err(tve->dev, "failed to set di_sel parent to tve_di: %d\n",
288 ret);
289 }
290
291 regmap_update_bits(tve->regmap, TVE_COM_CONF_REG,
292 TVE_IPU_CLK_EN, TVE_IPU_CLK_EN);
293
294 if (tve->mode == TVE_MODE_VGA)
295 ret = tve_setup_vga(tve);
296 else
297 ret = tve_setup_tvout(tve);
298 if (ret)
299 dev_err(tve->dev, "failed to set configuration: %d\n", ret);
300}
301
302static void imx_tve_encoder_enable(struct drm_encoder *encoder)
303{
304 struct imx_tve *tve = enc_to_tve(encoder);
305
306 tve_enable(tve);
307}
308
309static void imx_tve_encoder_disable(struct drm_encoder *encoder)
310{
311 struct imx_tve *tve = enc_to_tve(encoder);
312
313 tve_disable(tve);
314}
315
316static int imx_tve_atomic_check(struct drm_encoder *encoder,
317 struct drm_crtc_state *crtc_state,
318 struct drm_connector_state *conn_state)
319{
320 struct imx_crtc_state *imx_crtc_state = to_imx_crtc_state(crtc_state);
321 struct imx_tve *tve = enc_to_tve(encoder);
322
323 imx_crtc_state->bus_format = MEDIA_BUS_FMT_GBR888_1X24;
324 imx_crtc_state->di_hsync_pin = tve->di_hsync_pin;
325 imx_crtc_state->di_vsync_pin = tve->di_vsync_pin;
326
327 return 0;
328}
329
330static const struct drm_connector_funcs imx_tve_connector_funcs = {
331 .fill_modes = drm_helper_probe_single_connector_modes,
332 .destroy = imx_drm_connector_destroy,
333 .reset = drm_atomic_helper_connector_reset,
334 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
335 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
336};
337
338static const struct drm_connector_helper_funcs imx_tve_connector_helper_funcs = {
339 .get_modes = imx_tve_connector_get_modes,
340 .mode_valid = imx_tve_connector_mode_valid,
341};
342
343static const struct drm_encoder_helper_funcs imx_tve_encoder_helper_funcs = {
344 .mode_set = imx_tve_encoder_mode_set,
345 .enable = imx_tve_encoder_enable,
346 .disable = imx_tve_encoder_disable,
347 .atomic_check = imx_tve_atomic_check,
348};
349
350static irqreturn_t imx_tve_irq_handler(int irq, void *data)
351{
352 struct imx_tve *tve = data;
353 unsigned int val;
354
355 regmap_read(tve->regmap, TVE_STAT_REG, &val);
356
357
358 regmap_write(tve->regmap, TVE_STAT_REG, 0xffffffff);
359
360 return IRQ_HANDLED;
361}
362
363static unsigned long clk_tve_di_recalc_rate(struct clk_hw *hw,
364 unsigned long parent_rate)
365{
366 struct imx_tve *tve = container_of(hw, struct imx_tve, clk_hw_di);
367 unsigned int val;
368 int ret;
369
370 ret = regmap_read(tve->regmap, TVE_COM_CONF_REG, &val);
371 if (ret < 0)
372 return 0;
373
374 switch (val & TVE_DAC_SAMP_RATE_MASK) {
375 case TVE_DAC_DIV4_RATE:
376 return parent_rate / 4;
377 case TVE_DAC_DIV2_RATE:
378 return parent_rate / 2;
379 case TVE_DAC_FULL_RATE:
380 default:
381 return parent_rate;
382 }
383
384 return 0;
385}
386
387static long clk_tve_di_round_rate(struct clk_hw *hw, unsigned long rate,
388 unsigned long *prate)
389{
390 unsigned long div;
391
392 div = *prate / rate;
393 if (div >= 4)
394 return *prate / 4;
395 else if (div >= 2)
396 return *prate / 2;
397 return *prate;
398}
399
400static int clk_tve_di_set_rate(struct clk_hw *hw, unsigned long rate,
401 unsigned long parent_rate)
402{
403 struct imx_tve *tve = container_of(hw, struct imx_tve, clk_hw_di);
404 unsigned long div;
405 u32 val;
406 int ret;
407
408 div = parent_rate / rate;
409 if (div >= 4)
410 val = TVE_DAC_DIV4_RATE;
411 else if (div >= 2)
412 val = TVE_DAC_DIV2_RATE;
413 else
414 val = TVE_DAC_FULL_RATE;
415
416 ret = regmap_update_bits(tve->regmap, TVE_COM_CONF_REG,
417 TVE_DAC_SAMP_RATE_MASK, val);
418
419 if (ret < 0) {
420 dev_err(tve->dev, "failed to set divider: %d\n", ret);
421 return ret;
422 }
423
424 return 0;
425}
426
427static const struct clk_ops clk_tve_di_ops = {
428 .round_rate = clk_tve_di_round_rate,
429 .set_rate = clk_tve_di_set_rate,
430 .recalc_rate = clk_tve_di_recalc_rate,
431};
432
433static int tve_clk_init(struct imx_tve *tve, void __iomem *base)
434{
435 const char *tve_di_parent[1];
436 struct clk_init_data init = {
437 .name = "tve_di",
438 .ops = &clk_tve_di_ops,
439 .num_parents = 1,
440 .flags = 0,
441 };
442
443 tve_di_parent[0] = __clk_get_name(tve->clk);
444 init.parent_names = (const char **)&tve_di_parent;
445
446 tve->clk_hw_di.init = &init;
447 tve->di_clk = clk_register(tve->dev, &tve->clk_hw_di);
448 if (IS_ERR(tve->di_clk)) {
449 dev_err(tve->dev, "failed to register TVE output clock: %ld\n",
450 PTR_ERR(tve->di_clk));
451 return PTR_ERR(tve->di_clk);
452 }
453
454 return 0;
455}
456
457static int imx_tve_register(struct drm_device *drm, struct imx_tve *tve)
458{
459 int encoder_type;
460 int ret;
461
462 encoder_type = tve->mode == TVE_MODE_VGA ?
463 DRM_MODE_ENCODER_DAC : DRM_MODE_ENCODER_TVDAC;
464
465 ret = imx_drm_encoder_parse_of(drm, &tve->encoder, tve->dev->of_node);
466 if (ret)
467 return ret;
468
469 drm_encoder_helper_add(&tve->encoder, &imx_tve_encoder_helper_funcs);
470 drm_simple_encoder_init(drm, &tve->encoder, encoder_type);
471
472 drm_connector_helper_add(&tve->connector,
473 &imx_tve_connector_helper_funcs);
474 drm_connector_init_with_ddc(drm, &tve->connector,
475 &imx_tve_connector_funcs,
476 DRM_MODE_CONNECTOR_VGA,
477 tve->ddc);
478
479 drm_connector_attach_encoder(&tve->connector, &tve->encoder);
480
481 return 0;
482}
483
484static void imx_tve_disable_regulator(void *data)
485{
486 struct imx_tve *tve = data;
487
488 regulator_disable(tve->dac_reg);
489}
490
491static bool imx_tve_readable_reg(struct device *dev, unsigned int reg)
492{
493 return (reg % 4 == 0) && (reg <= 0xdc);
494}
495
496static struct regmap_config tve_regmap_config = {
497 .reg_bits = 32,
498 .val_bits = 32,
499 .reg_stride = 4,
500
501 .readable_reg = imx_tve_readable_reg,
502
503 .lock = tve_lock,
504 .unlock = tve_unlock,
505
506 .max_register = 0xdc,
507};
508
509static const char * const imx_tve_modes[] = {
510 [TVE_MODE_TVOUT] = "tvout",
511 [TVE_MODE_VGA] = "vga",
512};
513
514static const int of_get_tve_mode(struct device_node *np)
515{
516 const char *bm;
517 int ret, i;
518
519 ret = of_property_read_string(np, "fsl,tve-mode", &bm);
520 if (ret < 0)
521 return ret;
522
523 for (i = 0; i < ARRAY_SIZE(imx_tve_modes); i++)
524 if (!strcasecmp(bm, imx_tve_modes[i]))
525 return i;
526
527 return -EINVAL;
528}
529
530static int imx_tve_bind(struct device *dev, struct device *master, void *data)
531{
532 struct platform_device *pdev = to_platform_device(dev);
533 struct drm_device *drm = data;
534 struct device_node *np = dev->of_node;
535 struct device_node *ddc_node;
536 struct imx_tve *tve;
537 struct resource *res;
538 void __iomem *base;
539 unsigned int val;
540 int irq;
541 int ret;
542
543 tve = dev_get_drvdata(dev);
544 memset(tve, 0, sizeof(*tve));
545
546 tve->dev = dev;
547 spin_lock_init(&tve->lock);
548
549 ddc_node = of_parse_phandle(np, "ddc-i2c-bus", 0);
550 if (ddc_node) {
551 tve->ddc = of_find_i2c_adapter_by_node(ddc_node);
552 of_node_put(ddc_node);
553 }
554
555 tve->mode = of_get_tve_mode(np);
556 if (tve->mode != TVE_MODE_VGA) {
557 dev_err(dev, "only VGA mode supported, currently\n");
558 return -EINVAL;
559 }
560
561 if (tve->mode == TVE_MODE_VGA) {
562 ret = of_property_read_u32(np, "fsl,hsync-pin",
563 &tve->di_hsync_pin);
564
565 if (ret < 0) {
566 dev_err(dev, "failed to get hsync pin\n");
567 return ret;
568 }
569
570 ret = of_property_read_u32(np, "fsl,vsync-pin",
571 &tve->di_vsync_pin);
572
573 if (ret < 0) {
574 dev_err(dev, "failed to get vsync pin\n");
575 return ret;
576 }
577 }
578
579 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
580 base = devm_ioremap_resource(dev, res);
581 if (IS_ERR(base))
582 return PTR_ERR(base);
583
584 tve_regmap_config.lock_arg = tve;
585 tve->regmap = devm_regmap_init_mmio_clk(dev, "tve", base,
586 &tve_regmap_config);
587 if (IS_ERR(tve->regmap)) {
588 dev_err(dev, "failed to init regmap: %ld\n",
589 PTR_ERR(tve->regmap));
590 return PTR_ERR(tve->regmap);
591 }
592
593 irq = platform_get_irq(pdev, 0);
594 if (irq < 0)
595 return irq;
596
597 ret = devm_request_threaded_irq(dev, irq, NULL,
598 imx_tve_irq_handler, IRQF_ONESHOT,
599 "imx-tve", tve);
600 if (ret < 0) {
601 dev_err(dev, "failed to request irq: %d\n", ret);
602 return ret;
603 }
604
605 tve->dac_reg = devm_regulator_get(dev, "dac");
606 if (!IS_ERR(tve->dac_reg)) {
607 if (regulator_get_voltage(tve->dac_reg) != IMX_TVE_DAC_VOLTAGE)
608 dev_warn(dev, "dac voltage is not %d uV\n", IMX_TVE_DAC_VOLTAGE);
609 ret = regulator_enable(tve->dac_reg);
610 if (ret)
611 return ret;
612 ret = devm_add_action_or_reset(dev, imx_tve_disable_regulator, tve);
613 if (ret)
614 return ret;
615 }
616
617 tve->clk = devm_clk_get(dev, "tve");
618 if (IS_ERR(tve->clk)) {
619 dev_err(dev, "failed to get high speed tve clock: %ld\n",
620 PTR_ERR(tve->clk));
621 return PTR_ERR(tve->clk);
622 }
623
624
625 tve->di_sel_clk = devm_clk_get(dev, "di_sel");
626 if (IS_ERR(tve->di_sel_clk)) {
627 dev_err(dev, "failed to get ipu di mux clock: %ld\n",
628 PTR_ERR(tve->di_sel_clk));
629 return PTR_ERR(tve->di_sel_clk);
630 }
631
632 ret = tve_clk_init(tve, base);
633 if (ret < 0)
634 return ret;
635
636 ret = regmap_read(tve->regmap, TVE_COM_CONF_REG, &val);
637 if (ret < 0) {
638 dev_err(dev, "failed to read configuration register: %d\n",
639 ret);
640 return ret;
641 }
642 if (val != 0x00100000) {
643 dev_err(dev, "configuration register default value indicates this is not a TVEv2\n");
644 return -ENODEV;
645 }
646
647
648 ret = regmap_write(tve->regmap, TVE_CD_CONT_REG, 0);
649 if (ret)
650 return ret;
651
652 ret = imx_tve_register(drm, tve);
653 if (ret)
654 return ret;
655
656 return 0;
657}
658
659static const struct component_ops imx_tve_ops = {
660 .bind = imx_tve_bind,
661};
662
663static int imx_tve_probe(struct platform_device *pdev)
664{
665 struct imx_tve *tve;
666
667 tve = devm_kzalloc(&pdev->dev, sizeof(*tve), GFP_KERNEL);
668 if (!tve)
669 return -ENOMEM;
670
671 platform_set_drvdata(pdev, tve);
672
673 return component_add(&pdev->dev, &imx_tve_ops);
674}
675
676static int imx_tve_remove(struct platform_device *pdev)
677{
678 component_del(&pdev->dev, &imx_tve_ops);
679 return 0;
680}
681
682static const struct of_device_id imx_tve_dt_ids[] = {
683 { .compatible = "fsl,imx53-tve", },
684 { }
685};
686MODULE_DEVICE_TABLE(of, imx_tve_dt_ids);
687
688static struct platform_driver imx_tve_driver = {
689 .probe = imx_tve_probe,
690 .remove = imx_tve_remove,
691 .driver = {
692 .of_match_table = imx_tve_dt_ids,
693 .name = "imx-tve",
694 },
695};
696
697module_platform_driver(imx_tve_driver);
698
699MODULE_DESCRIPTION("i.MX Television Encoder driver");
700MODULE_AUTHOR("Philipp Zabel, Pengutronix");
701MODULE_LICENSE("GPL");
702MODULE_ALIAS("platform:imx-tve");
703
