1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (c) 2010 Sascha Hauer <s.hauer@pengutronix.de>
4 * Copyright (C) 2005-2009 Freescale Semiconductor, Inc.
5 */
6 #include <linux/module.h>
7 #include <linux/export.h>
8 #include <linux/types.h>
9 #include <linux/reset.h>
10 #include <linux/platform_device.h>
11 #include <linux/err.h>
12 #include <linux/spinlock.h>
13 #include <linux/delay.h>
14 #include <linux/interrupt.h>
15 #include <linux/io.h>
16 #include <linux/clk.h>
17 #include <linux/list.h>
18 #include <linux/irq.h>
19 #include <linux/irqchip/chained_irq.h>
20 #include <linux/irqdomain.h>
21 #include <linux/of.h>
22 #include <linux/of_graph.h>
23
24 #include <drm/drm_fourcc.h>
25
26 #include <video/imx-ipu-v3.h>
27 #include "ipu-prv.h"
28
ipu_cm_read(struct ipu_soc * ipu,unsigned offset)29 static inline u32 ipu_cm_read(struct ipu_soc *ipu, unsigned offset)
30 {
31 return readl(ipu->cm_reg + offset);
32 }
33
ipu_cm_write(struct ipu_soc * ipu,u32 value,unsigned offset)34 static inline void ipu_cm_write(struct ipu_soc *ipu, u32 value, unsigned offset)
35 {
36 writel(value, ipu->cm_reg + offset);
37 }
38
ipu_get_num(struct ipu_soc * ipu)39 int ipu_get_num(struct ipu_soc *ipu)
40 {
41 return ipu->id;
42 }
43 EXPORT_SYMBOL_GPL(ipu_get_num);
44
ipu_srm_dp_update(struct ipu_soc * ipu,bool sync)45 void ipu_srm_dp_update(struct ipu_soc *ipu, bool sync)
46 {
47 u32 val;
48
49 val = ipu_cm_read(ipu, IPU_SRM_PRI2);
50 val &= ~DP_S_SRM_MODE_MASK;
51 val |= sync ? DP_S_SRM_MODE_NEXT_FRAME :
52 DP_S_SRM_MODE_NOW;
53 ipu_cm_write(ipu, val, IPU_SRM_PRI2);
54 }
55 EXPORT_SYMBOL_GPL(ipu_srm_dp_update);
56
ipu_drm_fourcc_to_colorspace(u32 drm_fourcc)57 enum ipu_color_space ipu_drm_fourcc_to_colorspace(u32 drm_fourcc)
58 {
59 switch (drm_fourcc) {
60 case DRM_FORMAT_ARGB1555:
61 case DRM_FORMAT_ABGR1555:
62 case DRM_FORMAT_RGBA5551:
63 case DRM_FORMAT_BGRA5551:
64 case DRM_FORMAT_RGB565:
65 case DRM_FORMAT_BGR565:
66 case DRM_FORMAT_RGB888:
67 case DRM_FORMAT_BGR888:
68 case DRM_FORMAT_ARGB4444:
69 case DRM_FORMAT_XRGB8888:
70 case DRM_FORMAT_XBGR8888:
71 case DRM_FORMAT_RGBX8888:
72 case DRM_FORMAT_BGRX8888:
73 case DRM_FORMAT_ARGB8888:
74 case DRM_FORMAT_ABGR8888:
75 case DRM_FORMAT_RGBA8888:
76 case DRM_FORMAT_BGRA8888:
77 case DRM_FORMAT_RGB565_A8:
78 case DRM_FORMAT_BGR565_A8:
79 case DRM_FORMAT_RGB888_A8:
80 case DRM_FORMAT_BGR888_A8:
81 case DRM_FORMAT_RGBX8888_A8:
82 case DRM_FORMAT_BGRX8888_A8:
83 return IPUV3_COLORSPACE_RGB;
84 case DRM_FORMAT_YUYV:
85 case DRM_FORMAT_UYVY:
86 case DRM_FORMAT_YUV420:
87 case DRM_FORMAT_YVU420:
88 case DRM_FORMAT_YUV422:
89 case DRM_FORMAT_YVU422:
90 case DRM_FORMAT_YUV444:
91 case DRM_FORMAT_YVU444:
92 case DRM_FORMAT_NV12:
93 case DRM_FORMAT_NV21:
94 case DRM_FORMAT_NV16:
95 case DRM_FORMAT_NV61:
96 return IPUV3_COLORSPACE_YUV;
97 default:
98 return IPUV3_COLORSPACE_UNKNOWN;
99 }
100 }
101 EXPORT_SYMBOL_GPL(ipu_drm_fourcc_to_colorspace);
102
ipu_pixelformat_to_colorspace(u32 pixelformat)103 enum ipu_color_space ipu_pixelformat_to_colorspace(u32 pixelformat)
104 {
105 switch (pixelformat) {
106 case V4L2_PIX_FMT_YUV420:
107 case V4L2_PIX_FMT_YVU420:
108 case V4L2_PIX_FMT_YUV422P:
109 case V4L2_PIX_FMT_UYVY:
110 case V4L2_PIX_FMT_YUYV:
111 case V4L2_PIX_FMT_NV12:
112 case V4L2_PIX_FMT_NV21:
113 case V4L2_PIX_FMT_NV16:
114 case V4L2_PIX_FMT_NV61:
115 return IPUV3_COLORSPACE_YUV;
116 case V4L2_PIX_FMT_RGB565:
117 case V4L2_PIX_FMT_BGR24:
118 case V4L2_PIX_FMT_RGB24:
119 case V4L2_PIX_FMT_ABGR32:
120 case V4L2_PIX_FMT_XBGR32:
121 case V4L2_PIX_FMT_BGRA32:
122 case V4L2_PIX_FMT_BGRX32:
123 case V4L2_PIX_FMT_RGBA32:
124 case V4L2_PIX_FMT_RGBX32:
125 case V4L2_PIX_FMT_ARGB32:
126 case V4L2_PIX_FMT_XRGB32:
127 case V4L2_PIX_FMT_RGB32:
128 case V4L2_PIX_FMT_BGR32:
129 return IPUV3_COLORSPACE_RGB;
130 default:
131 return IPUV3_COLORSPACE_UNKNOWN;
132 }
133 }
134 EXPORT_SYMBOL_GPL(ipu_pixelformat_to_colorspace);
135
ipu_degrees_to_rot_mode(enum ipu_rotate_mode * mode,int degrees,bool hflip,bool vflip)136 int ipu_degrees_to_rot_mode(enum ipu_rotate_mode *mode, int degrees,
137 bool hflip, bool vflip)
138 {
139 u32 r90, vf, hf;
140
141 switch (degrees) {
142 case 0:
143 vf = hf = r90 = 0;
144 break;
145 case 90:
146 vf = hf = 0;
147 r90 = 1;
148 break;
149 case 180:
150 vf = hf = 1;
151 r90 = 0;
152 break;
153 case 270:
154 vf = hf = r90 = 1;
155 break;
156 default:
157 return -EINVAL;
158 }
159
160 hf ^= (u32)hflip;
161 vf ^= (u32)vflip;
162
163 *mode = (enum ipu_rotate_mode)((r90 << 2) | (hf << 1) | vf);
164 return 0;
165 }
166 EXPORT_SYMBOL_GPL(ipu_degrees_to_rot_mode);
167
ipu_rot_mode_to_degrees(int * degrees,enum ipu_rotate_mode mode,bool hflip,bool vflip)168 int ipu_rot_mode_to_degrees(int *degrees, enum ipu_rotate_mode mode,
169 bool hflip, bool vflip)
170 {
171 u32 r90, vf, hf;
172
173 r90 = ((u32)mode >> 2) & 0x1;
174 hf = ((u32)mode >> 1) & 0x1;
175 vf = ((u32)mode >> 0) & 0x1;
176 hf ^= (u32)hflip;
177 vf ^= (u32)vflip;
178
179 switch ((enum ipu_rotate_mode)((r90 << 2) | (hf << 1) | vf)) {
180 case IPU_ROTATE_NONE:
181 *degrees = 0;
182 break;
183 case IPU_ROTATE_90_RIGHT:
184 *degrees = 90;
185 break;
186 case IPU_ROTATE_180:
187 *degrees = 180;
188 break;
189 case IPU_ROTATE_90_LEFT:
190 *degrees = 270;
191 break;
192 default:
193 return -EINVAL;
194 }
195
196 return 0;
197 }
198 EXPORT_SYMBOL_GPL(ipu_rot_mode_to_degrees);
199
ipu_idmac_get(struct ipu_soc * ipu,unsigned num)200 struct ipuv3_channel *ipu_idmac_get(struct ipu_soc *ipu, unsigned num)
201 {
202 struct ipuv3_channel *channel;
203
204 dev_dbg(ipu->dev, "%s %d\n", __func__, num);
205
206 if (num > 63)
207 return ERR_PTR(-ENODEV);
208
209 mutex_lock(&ipu->channel_lock);
210
211 list_for_each_entry(channel, &ipu->channels, list) {
212 if (channel->num == num) {
213 channel = ERR_PTR(-EBUSY);
214 goto out;
215 }
216 }
217
218 channel = kzalloc(sizeof(*channel), GFP_KERNEL);
219 if (!channel) {
220 channel = ERR_PTR(-ENOMEM);
221 goto out;
222 }
223
224 channel->num = num;
225 channel->ipu = ipu;
226 list_add(&channel->list, &ipu->channels);
227
228 out:
229 mutex_unlock(&ipu->channel_lock);
230
231 return channel;
232 }
233 EXPORT_SYMBOL_GPL(ipu_idmac_get);
234
ipu_idmac_put(struct ipuv3_channel * channel)235 void ipu_idmac_put(struct ipuv3_channel *channel)
236 {
237 struct ipu_soc *ipu = channel->ipu;
238
239 dev_dbg(ipu->dev, "%s %d\n", __func__, channel->num);
240
241 mutex_lock(&ipu->channel_lock);
242
243 list_del(&channel->list);
244 kfree(channel);
245
246 mutex_unlock(&ipu->channel_lock);
247 }
248 EXPORT_SYMBOL_GPL(ipu_idmac_put);
249
250 #define idma_mask(ch) (1 << ((ch) & 0x1f))
251
252 /*
253 * This is an undocumented feature, a write one to a channel bit in
254 * IPU_CHA_CUR_BUF and IPU_CHA_TRIPLE_CUR_BUF will reset the channel's
255 * internal current buffer pointer so that transfers start from buffer
256 * 0 on the next channel enable (that's the theory anyway, the imx6 TRM
257 * only says these are read-only registers). This operation is required
258 * for channel linking to work correctly, for instance video capture
259 * pipelines that carry out image rotations will fail after the first
260 * streaming unless this function is called for each channel before
261 * re-enabling the channels.
262 */
__ipu_idmac_reset_current_buffer(struct ipuv3_channel * channel)263 static void __ipu_idmac_reset_current_buffer(struct ipuv3_channel *channel)
264 {
265 struct ipu_soc *ipu = channel->ipu;
266 unsigned int chno = channel->num;
267
268 ipu_cm_write(ipu, idma_mask(chno), IPU_CHA_CUR_BUF(chno));
269 }
270
ipu_idmac_set_double_buffer(struct ipuv3_channel * channel,bool doublebuffer)271 void ipu_idmac_set_double_buffer(struct ipuv3_channel *channel,
272 bool doublebuffer)
273 {
274 struct ipu_soc *ipu = channel->ipu;
275 unsigned long flags;
276 u32 reg;
277
278 spin_lock_irqsave(&ipu->lock, flags);
279
280 reg = ipu_cm_read(ipu, IPU_CHA_DB_MODE_SEL(channel->num));
281 if (doublebuffer)
282 reg |= idma_mask(channel->num);
283 else
284 reg &= ~idma_mask(channel->num);
285 ipu_cm_write(ipu, reg, IPU_CHA_DB_MODE_SEL(channel->num));
286
287 __ipu_idmac_reset_current_buffer(channel);
288
289 spin_unlock_irqrestore(&ipu->lock, flags);
290 }
291 EXPORT_SYMBOL_GPL(ipu_idmac_set_double_buffer);
292
293 static const struct {
294 int chnum;
295 u32 reg;
296 int shift;
297 } idmac_lock_en_info[] = {
298 { .chnum = 5, .reg = IDMAC_CH_LOCK_EN_1, .shift = 0, },
299 { .chnum = 11, .reg = IDMAC_CH_LOCK_EN_1, .shift = 2, },
300 { .chnum = 12, .reg = IDMAC_CH_LOCK_EN_1, .shift = 4, },
301 { .chnum = 14, .reg = IDMAC_CH_LOCK_EN_1, .shift = 6, },
302 { .chnum = 15, .reg = IDMAC_CH_LOCK_EN_1, .shift = 8, },
303 { .chnum = 20, .reg = IDMAC_CH_LOCK_EN_1, .shift = 10, },
304 { .chnum = 21, .reg = IDMAC_CH_LOCK_EN_1, .shift = 12, },
305 { .chnum = 22, .reg = IDMAC_CH_LOCK_EN_1, .shift = 14, },
306 { .chnum = 23, .reg = IDMAC_CH_LOCK_EN_1, .shift = 16, },
307 { .chnum = 27, .reg = IDMAC_CH_LOCK_EN_1, .shift = 18, },
308 { .chnum = 28, .reg = IDMAC_CH_LOCK_EN_1, .shift = 20, },
309 { .chnum = 45, .reg = IDMAC_CH_LOCK_EN_2, .shift = 0, },
310 { .chnum = 46, .reg = IDMAC_CH_LOCK_EN_2, .shift = 2, },
311 { .chnum = 47, .reg = IDMAC_CH_LOCK_EN_2, .shift = 4, },
312 { .chnum = 48, .reg = IDMAC_CH_LOCK_EN_2, .shift = 6, },
313 { .chnum = 49, .reg = IDMAC_CH_LOCK_EN_2, .shift = 8, },
314 { .chnum = 50, .reg = IDMAC_CH_LOCK_EN_2, .shift = 10, },
315 };
316
ipu_idmac_lock_enable(struct ipuv3_channel * channel,int num_bursts)317 int ipu_idmac_lock_enable(struct ipuv3_channel *channel, int num_bursts)
318 {
319 struct ipu_soc *ipu = channel->ipu;
320 unsigned long flags;
321 u32 bursts, regval;
322 int i;
323
324 switch (num_bursts) {
325 case 0:
326 case 1:
327 bursts = 0x00; /* locking disabled */
328 break;
329 case 2:
330 bursts = 0x01;
331 break;
332 case 4:
333 bursts = 0x02;
334 break;
335 case 8:
336 bursts = 0x03;
337 break;
338 default:
339 return -EINVAL;
340 }
341
342 /*
343 * IPUv3EX / i.MX51 has a different register layout, and on IPUv3M /
344 * i.MX53 channel arbitration locking doesn't seem to work properly.
345 * Allow enabling the lock feature on IPUv3H / i.MX6 only.
346 */
347 if (bursts && ipu->ipu_type != IPUV3H)
348 return -EINVAL;
349
350 for (i = 0; i < ARRAY_SIZE(idmac_lock_en_info); i++) {
351 if (channel->num == idmac_lock_en_info[i].chnum)
352 break;
353 }
354 if (i >= ARRAY_SIZE(idmac_lock_en_info))
355 return -EINVAL;
356
357 spin_lock_irqsave(&ipu->lock, flags);
358
359 regval = ipu_idmac_read(ipu, idmac_lock_en_info[i].reg);
360 regval &= ~(0x03 << idmac_lock_en_info[i].shift);
361 regval |= (bursts << idmac_lock_en_info[i].shift);
362 ipu_idmac_write(ipu, regval, idmac_lock_en_info[i].reg);
363
364 spin_unlock_irqrestore(&ipu->lock, flags);
365
366 return 0;
367 }
368 EXPORT_SYMBOL_GPL(ipu_idmac_lock_enable);
369
ipu_module_enable(struct ipu_soc * ipu,u32 mask)370 int ipu_module_enable(struct ipu_soc *ipu, u32 mask)
371 {
372 unsigned long lock_flags;
373 u32 val;
374
375 spin_lock_irqsave(&ipu->lock, lock_flags);
376
377 val = ipu_cm_read(ipu, IPU_DISP_GEN);
378
379 if (mask & IPU_CONF_DI0_EN)
380 val |= IPU_DI0_COUNTER_RELEASE;
381 if (mask & IPU_CONF_DI1_EN)
382 val |= IPU_DI1_COUNTER_RELEASE;
383
384 ipu_cm_write(ipu, val, IPU_DISP_GEN);
385
386 val = ipu_cm_read(ipu, IPU_CONF);
387 val |= mask;
388 ipu_cm_write(ipu, val, IPU_CONF);
389
390 spin_unlock_irqrestore(&ipu->lock, lock_flags);
391
392 return 0;
393 }
394 EXPORT_SYMBOL_GPL(ipu_module_enable);
395
ipu_module_disable(struct ipu_soc * ipu,u32 mask)396 int ipu_module_disable(struct ipu_soc *ipu, u32 mask)
397 {
398 unsigned long lock_flags;
399 u32 val;
400
401 spin_lock_irqsave(&ipu->lock, lock_flags);
402
403 val = ipu_cm_read(ipu, IPU_CONF);
404 val &= ~mask;
405 ipu_cm_write(ipu, val, IPU_CONF);
406
407 val = ipu_cm_read(ipu, IPU_DISP_GEN);
408
409 if (mask & IPU_CONF_DI0_EN)
410 val &= ~IPU_DI0_COUNTER_RELEASE;
411 if (mask & IPU_CONF_DI1_EN)
412 val &= ~IPU_DI1_COUNTER_RELEASE;
413
414 ipu_cm_write(ipu, val, IPU_DISP_GEN);
415
416 spin_unlock_irqrestore(&ipu->lock, lock_flags);
417
418 return 0;
419 }
420 EXPORT_SYMBOL_GPL(ipu_module_disable);
421
ipu_idmac_get_current_buffer(struct ipuv3_channel * channel)422 int ipu_idmac_get_current_buffer(struct ipuv3_channel *channel)
423 {
424 struct ipu_soc *ipu = channel->ipu;
425 unsigned int chno = channel->num;
426
427 return (ipu_cm_read(ipu, IPU_CHA_CUR_BUF(chno)) & idma_mask(chno)) ? 1 : 0;
428 }
429 EXPORT_SYMBOL_GPL(ipu_idmac_get_current_buffer);
430
ipu_idmac_buffer_is_ready(struct ipuv3_channel * channel,u32 buf_num)431 bool ipu_idmac_buffer_is_ready(struct ipuv3_channel *channel, u32 buf_num)
432 {
433 struct ipu_soc *ipu = channel->ipu;
434 unsigned long flags;
435 u32 reg = 0;
436
437 spin_lock_irqsave(&ipu->lock, flags);
438 switch (buf_num) {
439 case 0:
440 reg = ipu_cm_read(ipu, IPU_CHA_BUF0_RDY(channel->num));
441 break;
442 case 1:
443 reg = ipu_cm_read(ipu, IPU_CHA_BUF1_RDY(channel->num));
444 break;
445 case 2:
446 reg = ipu_cm_read(ipu, IPU_CHA_BUF2_RDY(channel->num));
447 break;
448 }
449 spin_unlock_irqrestore(&ipu->lock, flags);
450
451 return ((reg & idma_mask(channel->num)) != 0);
452 }
453 EXPORT_SYMBOL_GPL(ipu_idmac_buffer_is_ready);
454
ipu_idmac_select_buffer(struct ipuv3_channel * channel,u32 buf_num)455 void ipu_idmac_select_buffer(struct ipuv3_channel *channel, u32 buf_num)
456 {
457 struct ipu_soc *ipu = channel->ipu;
458 unsigned int chno = channel->num;
459 unsigned long flags;
460
461 spin_lock_irqsave(&ipu->lock, flags);
462
463 /* Mark buffer as ready. */
464 if (buf_num == 0)
465 ipu_cm_write(ipu, idma_mask(chno), IPU_CHA_BUF0_RDY(chno));
466 else
467 ipu_cm_write(ipu, idma_mask(chno), IPU_CHA_BUF1_RDY(chno));
468
469 spin_unlock_irqrestore(&ipu->lock, flags);
470 }
471 EXPORT_SYMBOL_GPL(ipu_idmac_select_buffer);
472
ipu_idmac_clear_buffer(struct ipuv3_channel * channel,u32 buf_num)473 void ipu_idmac_clear_buffer(struct ipuv3_channel *channel, u32 buf_num)
474 {
475 struct ipu_soc *ipu = channel->ipu;
476 unsigned int chno = channel->num;
477 unsigned long flags;
478
479 spin_lock_irqsave(&ipu->lock, flags);
480
481 ipu_cm_write(ipu, 0xF0300000, IPU_GPR); /* write one to clear */
482 switch (buf_num) {
483 case 0:
484 ipu_cm_write(ipu, idma_mask(chno), IPU_CHA_BUF0_RDY(chno));
485 break;
486 case 1:
487 ipu_cm_write(ipu, idma_mask(chno), IPU_CHA_BUF1_RDY(chno));
488 break;
489 case 2:
490 ipu_cm_write(ipu, idma_mask(chno), IPU_CHA_BUF2_RDY(chno));
491 break;
492 default:
493 break;
494 }
495 ipu_cm_write(ipu, 0x0, IPU_GPR); /* write one to set */
496
497 spin_unlock_irqrestore(&ipu->lock, flags);
498 }
499 EXPORT_SYMBOL_GPL(ipu_idmac_clear_buffer);
500
ipu_idmac_enable_channel(struct ipuv3_channel * channel)501 int ipu_idmac_enable_channel(struct ipuv3_channel *channel)
502 {
503 struct ipu_soc *ipu = channel->ipu;
504 u32 val;
505 unsigned long flags;
506
507 spin_lock_irqsave(&ipu->lock, flags);
508
509 val = ipu_idmac_read(ipu, IDMAC_CHA_EN(channel->num));
510 val |= idma_mask(channel->num);
511 ipu_idmac_write(ipu, val, IDMAC_CHA_EN(channel->num));
512
513 spin_unlock_irqrestore(&ipu->lock, flags);
514
515 return 0;
516 }
517 EXPORT_SYMBOL_GPL(ipu_idmac_enable_channel);
518
ipu_idmac_channel_busy(struct ipu_soc * ipu,unsigned int chno)519 bool ipu_idmac_channel_busy(struct ipu_soc *ipu, unsigned int chno)
520 {
521 return (ipu_idmac_read(ipu, IDMAC_CHA_BUSY(chno)) & idma_mask(chno));
522 }
523 EXPORT_SYMBOL_GPL(ipu_idmac_channel_busy);
524
ipu_idmac_wait_busy(struct ipuv3_channel * channel,int ms)525 int ipu_idmac_wait_busy(struct ipuv3_channel *channel, int ms)
526 {
527 struct ipu_soc *ipu = channel->ipu;
528 unsigned long timeout;
529
530 timeout = jiffies + msecs_to_jiffies(ms);
531 while (ipu_idmac_read(ipu, IDMAC_CHA_BUSY(channel->num)) &
532 idma_mask(channel->num)) {
533 if (time_after(jiffies, timeout))
534 return -ETIMEDOUT;
535 cpu_relax();
536 }
537
538 return 0;
539 }
540 EXPORT_SYMBOL_GPL(ipu_idmac_wait_busy);
541
ipu_idmac_disable_channel(struct ipuv3_channel * channel)542 int ipu_idmac_disable_channel(struct ipuv3_channel *channel)
543 {
544 struct ipu_soc *ipu = channel->ipu;
545 u32 val;
546 unsigned long flags;
547
548 spin_lock_irqsave(&ipu->lock, flags);
549
550 /* Disable DMA channel(s) */
551 val = ipu_idmac_read(ipu, IDMAC_CHA_EN(channel->num));
552 val &= ~idma_mask(channel->num);
553 ipu_idmac_write(ipu, val, IDMAC_CHA_EN(channel->num));
554
555 __ipu_idmac_reset_current_buffer(channel);
556
557 /* Set channel buffers NOT to be ready */
558 ipu_cm_write(ipu, 0xf0000000, IPU_GPR); /* write one to clear */
559
560 if (ipu_cm_read(ipu, IPU_CHA_BUF0_RDY(channel->num)) &
561 idma_mask(channel->num)) {
562 ipu_cm_write(ipu, idma_mask(channel->num),
563 IPU_CHA_BUF0_RDY(channel->num));
564 }
565
566 if (ipu_cm_read(ipu, IPU_CHA_BUF1_RDY(channel->num)) &
567 idma_mask(channel->num)) {
568 ipu_cm_write(ipu, idma_mask(channel->num),
569 IPU_CHA_BUF1_RDY(channel->num));
570 }
571
572 ipu_cm_write(ipu, 0x0, IPU_GPR); /* write one to set */
573
574 /* Reset the double buffer */
575 val = ipu_cm_read(ipu, IPU_CHA_DB_MODE_SEL(channel->num));
576 val &= ~idma_mask(channel->num);
577 ipu_cm_write(ipu, val, IPU_CHA_DB_MODE_SEL(channel->num));
578
579 spin_unlock_irqrestore(&ipu->lock, flags);
580
581 return 0;
582 }
583 EXPORT_SYMBOL_GPL(ipu_idmac_disable_channel);
584
585 /*
586 * The imx6 rev. D TRM says that enabling the WM feature will increase
587 * a channel's priority. Refer to Table 36-8 Calculated priority value.
588 * The sub-module that is the sink or source for the channel must enable
589 * watermark signal for this to take effect (SMFC_WM for instance).
590 */
ipu_idmac_enable_watermark(struct ipuv3_channel * channel,bool enable)591 void ipu_idmac_enable_watermark(struct ipuv3_channel *channel, bool enable)
592 {
593 struct ipu_soc *ipu = channel->ipu;
594 unsigned long flags;
595 u32 val;
596
597 spin_lock_irqsave(&ipu->lock, flags);
598
599 val = ipu_idmac_read(ipu, IDMAC_WM_EN(channel->num));
600 if (enable)
601 val |= 1 << (channel->num % 32);
602 else
603 val &= ~(1 << (channel->num % 32));
604 ipu_idmac_write(ipu, val, IDMAC_WM_EN(channel->num));
605
606 spin_unlock_irqrestore(&ipu->lock, flags);
607 }
608 EXPORT_SYMBOL_GPL(ipu_idmac_enable_watermark);
609
ipu_memory_reset(struct ipu_soc * ipu)610 static int ipu_memory_reset(struct ipu_soc *ipu)
611 {
612 unsigned long timeout;
613
614 ipu_cm_write(ipu, 0x807FFFFF, IPU_MEM_RST);
615
616 timeout = jiffies + msecs_to_jiffies(1000);
617 while (ipu_cm_read(ipu, IPU_MEM_RST) & 0x80000000) {
618 if (time_after(jiffies, timeout))
619 return -ETIME;
620 cpu_relax();
621 }
622
623 return 0;
624 }
625
626 /*
627 * Set the source mux for the given CSI. Selects either parallel or
628 * MIPI CSI2 sources.
629 */
ipu_set_csi_src_mux(struct ipu_soc * ipu,int csi_id,bool mipi_csi2)630 void ipu_set_csi_src_mux(struct ipu_soc *ipu, int csi_id, bool mipi_csi2)
631 {
632 unsigned long flags;
633 u32 val, mask;
634
635 mask = (csi_id == 1) ? IPU_CONF_CSI1_DATA_SOURCE :
636 IPU_CONF_CSI0_DATA_SOURCE;
637
638 spin_lock_irqsave(&ipu->lock, flags);
639
640 val = ipu_cm_read(ipu, IPU_CONF);
641 if (mipi_csi2)
642 val |= mask;
643 else
644 val &= ~mask;
645 ipu_cm_write(ipu, val, IPU_CONF);
646
647 spin_unlock_irqrestore(&ipu->lock, flags);
648 }
649 EXPORT_SYMBOL_GPL(ipu_set_csi_src_mux);
650
651 /*
652 * Set the source mux for the IC. Selects either CSI[01] or the VDI.
653 */
ipu_set_ic_src_mux(struct ipu_soc * ipu,int csi_id,bool vdi)654 void ipu_set_ic_src_mux(struct ipu_soc *ipu, int csi_id, bool vdi)
655 {
656 unsigned long flags;
657 u32 val;
658
659 spin_lock_irqsave(&ipu->lock, flags);
660
661 val = ipu_cm_read(ipu, IPU_CONF);
662 if (vdi)
663 val |= IPU_CONF_IC_INPUT;
664 else
665 val &= ~IPU_CONF_IC_INPUT;
666
667 if (csi_id == 1)
668 val |= IPU_CONF_CSI_SEL;
669 else
670 val &= ~IPU_CONF_CSI_SEL;
671
672 ipu_cm_write(ipu, val, IPU_CONF);
673
674 spin_unlock_irqrestore(&ipu->lock, flags);
675 }
676 EXPORT_SYMBOL_GPL(ipu_set_ic_src_mux);
677
678
679 /* Frame Synchronization Unit Channel Linking */
680
681 struct fsu_link_reg_info {
682 int chno;
683 u32 reg;
684 u32 mask;
685 u32 val;
686 };
687
688 struct fsu_link_info {
689 struct fsu_link_reg_info src;
690 struct fsu_link_reg_info sink;
691 };
692
693 static const struct fsu_link_info fsu_link_info[] = {
694 {
695 .src = { IPUV3_CHANNEL_IC_PRP_ENC_MEM, IPU_FS_PROC_FLOW2,
696 FS_PRP_ENC_DEST_SEL_MASK, FS_PRP_ENC_DEST_SEL_IRT_ENC },
697 .sink = { IPUV3_CHANNEL_MEM_ROT_ENC, IPU_FS_PROC_FLOW1,
698 FS_PRPENC_ROT_SRC_SEL_MASK, FS_PRPENC_ROT_SRC_SEL_ENC },
699 }, {
700 .src = { IPUV3_CHANNEL_IC_PRP_VF_MEM, IPU_FS_PROC_FLOW2,
701 FS_PRPVF_DEST_SEL_MASK, FS_PRPVF_DEST_SEL_IRT_VF },
702 .sink = { IPUV3_CHANNEL_MEM_ROT_VF, IPU_FS_PROC_FLOW1,
703 FS_PRPVF_ROT_SRC_SEL_MASK, FS_PRPVF_ROT_SRC_SEL_VF },
704 }, {
705 .src = { IPUV3_CHANNEL_IC_PP_MEM, IPU_FS_PROC_FLOW2,
706 FS_PP_DEST_SEL_MASK, FS_PP_DEST_SEL_IRT_PP },
707 .sink = { IPUV3_CHANNEL_MEM_ROT_PP, IPU_FS_PROC_FLOW1,
708 FS_PP_ROT_SRC_SEL_MASK, FS_PP_ROT_SRC_SEL_PP },
709 }, {
710 .src = { IPUV3_CHANNEL_CSI_DIRECT, 0 },
711 .sink = { IPUV3_CHANNEL_CSI_VDI_PREV, IPU_FS_PROC_FLOW1,
712 FS_VDI_SRC_SEL_MASK, FS_VDI_SRC_SEL_CSI_DIRECT },
713 },
714 };
715
find_fsu_link_info(int src,int sink)716 static const struct fsu_link_info *find_fsu_link_info(int src, int sink)
717 {
718 int i;
719
720 for (i = 0; i < ARRAY_SIZE(fsu_link_info); i++) {
721 if (src == fsu_link_info[i].src.chno &&
722 sink == fsu_link_info[i].sink.chno)
723 return &fsu_link_info[i];
724 }
725
726 return NULL;
727 }
728
729 /*
730 * Links a source channel to a sink channel in the FSU.
731 */
ipu_fsu_link(struct ipu_soc * ipu,int src_ch,int sink_ch)732 int ipu_fsu_link(struct ipu_soc *ipu, int src_ch, int sink_ch)
733 {
734 const struct fsu_link_info *link;
735 u32 src_reg, sink_reg;
736 unsigned long flags;
737
738 link = find_fsu_link_info(src_ch, sink_ch);
739 if (!link)
740 return -EINVAL;
741
742 spin_lock_irqsave(&ipu->lock, flags);
743
744 if (link->src.mask) {
745 src_reg = ipu_cm_read(ipu, link->src.reg);
746 src_reg &= ~link->src.mask;
747 src_reg |= link->src.val;
748 ipu_cm_write(ipu, src_reg, link->src.reg);
749 }
750
751 if (link->sink.mask) {
752 sink_reg = ipu_cm_read(ipu, link->sink.reg);
753 sink_reg &= ~link->sink.mask;
754 sink_reg |= link->sink.val;
755 ipu_cm_write(ipu, sink_reg, link->sink.reg);
756 }
757
758 spin_unlock_irqrestore(&ipu->lock, flags);
759 return 0;
760 }
761 EXPORT_SYMBOL_GPL(ipu_fsu_link);
762
763 /*
764 * Unlinks source and sink channels in the FSU.
765 */
ipu_fsu_unlink(struct ipu_soc * ipu,int src_ch,int sink_ch)766 int ipu_fsu_unlink(struct ipu_soc *ipu, int src_ch, int sink_ch)
767 {
768 const struct fsu_link_info *link;
769 u32 src_reg, sink_reg;
770 unsigned long flags;
771
772 link = find_fsu_link_info(src_ch, sink_ch);
773 if (!link)
774 return -EINVAL;
775
776 spin_lock_irqsave(&ipu->lock, flags);
777
778 if (link->src.mask) {
779 src_reg = ipu_cm_read(ipu, link->src.reg);
780 src_reg &= ~link->src.mask;
781 ipu_cm_write(ipu, src_reg, link->src.reg);
782 }
783
784 if (link->sink.mask) {
785 sink_reg = ipu_cm_read(ipu, link->sink.reg);
786 sink_reg &= ~link->sink.mask;
787 ipu_cm_write(ipu, sink_reg, link->sink.reg);
788 }
789
790 spin_unlock_irqrestore(&ipu->lock, flags);
791 return 0;
792 }
793 EXPORT_SYMBOL_GPL(ipu_fsu_unlink);
794
795 /* Link IDMAC channels in the FSU */
ipu_idmac_link(struct ipuv3_channel * src,struct ipuv3_channel * sink)796 int ipu_idmac_link(struct ipuv3_channel *src, struct ipuv3_channel *sink)
797 {
798 return ipu_fsu_link(src->ipu, src->num, sink->num);
799 }
800 EXPORT_SYMBOL_GPL(ipu_idmac_link);
801
802 /* Unlink IDMAC channels in the FSU */
ipu_idmac_unlink(struct ipuv3_channel * src,struct ipuv3_channel * sink)803 int ipu_idmac_unlink(struct ipuv3_channel *src, struct ipuv3_channel *sink)
804 {
805 return ipu_fsu_unlink(src->ipu, src->num, sink->num);
806 }
807 EXPORT_SYMBOL_GPL(ipu_idmac_unlink);
808
809 struct ipu_devtype {
810 const char *name;
811 unsigned long cm_ofs;
812 unsigned long cpmem_ofs;
813 unsigned long srm_ofs;
814 unsigned long tpm_ofs;
815 unsigned long csi0_ofs;
816 unsigned long csi1_ofs;
817 unsigned long ic_ofs;
818 unsigned long disp0_ofs;
819 unsigned long disp1_ofs;
820 unsigned long dc_tmpl_ofs;
821 unsigned long vdi_ofs;
822 enum ipuv3_type type;
823 };
824
825 static struct ipu_devtype ipu_type_imx51 = {
826 .name = "IPUv3EX",
827 .cm_ofs = 0x1e000000,
828 .cpmem_ofs = 0x1f000000,
829 .srm_ofs = 0x1f040000,
830 .tpm_ofs = 0x1f060000,
831 .csi0_ofs = 0x1e030000,
832 .csi1_ofs = 0x1e038000,
833 .ic_ofs = 0x1e020000,
834 .disp0_ofs = 0x1e040000,
835 .disp1_ofs = 0x1e048000,
836 .dc_tmpl_ofs = 0x1f080000,
837 .vdi_ofs = 0x1e068000,
838 .type = IPUV3EX,
839 };
840
841 static struct ipu_devtype ipu_type_imx53 = {
842 .name = "IPUv3M",
843 .cm_ofs = 0x06000000,
844 .cpmem_ofs = 0x07000000,
845 .srm_ofs = 0x07040000,
846 .tpm_ofs = 0x07060000,
847 .csi0_ofs = 0x06030000,
848 .csi1_ofs = 0x06038000,
849 .ic_ofs = 0x06020000,
850 .disp0_ofs = 0x06040000,
851 .disp1_ofs = 0x06048000,
852 .dc_tmpl_ofs = 0x07080000,
853 .vdi_ofs = 0x06068000,
854 .type = IPUV3M,
855 };
856
857 static struct ipu_devtype ipu_type_imx6q = {
858 .name = "IPUv3H",
859 .cm_ofs = 0x00200000,
860 .cpmem_ofs = 0x00300000,
861 .srm_ofs = 0x00340000,
862 .tpm_ofs = 0x00360000,
863 .csi0_ofs = 0x00230000,
864 .csi1_ofs = 0x00238000,
865 .ic_ofs = 0x00220000,
866 .disp0_ofs = 0x00240000,
867 .disp1_ofs = 0x00248000,
868 .dc_tmpl_ofs = 0x00380000,
869 .vdi_ofs = 0x00268000,
870 .type = IPUV3H,
871 };
872
873 static const struct of_device_id imx_ipu_dt_ids[] = {
874 { .compatible = "fsl,imx51-ipu", .data = &ipu_type_imx51, },
875 { .compatible = "fsl,imx53-ipu", .data = &ipu_type_imx53, },
876 { .compatible = "fsl,imx6q-ipu", .data = &ipu_type_imx6q, },
877 { .compatible = "fsl,imx6qp-ipu", .data = &ipu_type_imx6q, },
878 { /* sentinel */ }
879 };
880 MODULE_DEVICE_TABLE(of, imx_ipu_dt_ids);
881
ipu_submodules_init(struct ipu_soc * ipu,struct platform_device * pdev,unsigned long ipu_base,struct clk * ipu_clk)882 static int ipu_submodules_init(struct ipu_soc *ipu,
883 struct platform_device *pdev, unsigned long ipu_base,
884 struct clk *ipu_clk)
885 {
886 char *unit;
887 int ret;
888 struct device *dev = &pdev->dev;
889 const struct ipu_devtype *devtype = ipu->devtype;
890
891 ret = ipu_cpmem_init(ipu, dev, ipu_base + devtype->cpmem_ofs);
892 if (ret) {
893 unit = "cpmem";
894 goto err_cpmem;
895 }
896
897 ret = ipu_csi_init(ipu, dev, 0, ipu_base + devtype->csi0_ofs,
898 IPU_CONF_CSI0_EN, ipu_clk);
899 if (ret) {
900 unit = "csi0";
901 goto err_csi_0;
902 }
903
904 ret = ipu_csi_init(ipu, dev, 1, ipu_base + devtype->csi1_ofs,
905 IPU_CONF_CSI1_EN, ipu_clk);
906 if (ret) {
907 unit = "csi1";
908 goto err_csi_1;
909 }
910
911 ret = ipu_ic_init(ipu, dev,
912 ipu_base + devtype->ic_ofs,
913 ipu_base + devtype->tpm_ofs);
914 if (ret) {
915 unit = "ic";
916 goto err_ic;
917 }
918
919 ret = ipu_vdi_init(ipu, dev, ipu_base + devtype->vdi_ofs,
920 IPU_CONF_VDI_EN | IPU_CONF_ISP_EN |
921 IPU_CONF_IC_INPUT);
922 if (ret) {
923 unit = "vdi";
924 goto err_vdi;
925 }
926
927 ret = ipu_image_convert_init(ipu, dev);
928 if (ret) {
929 unit = "image_convert";
930 goto err_image_convert;
931 }
932
933 ret = ipu_di_init(ipu, dev, 0, ipu_base + devtype->disp0_ofs,
934 IPU_CONF_DI0_EN, ipu_clk);
935 if (ret) {
936 unit = "di0";
937 goto err_di_0;
938 }
939
940 ret = ipu_di_init(ipu, dev, 1, ipu_base + devtype->disp1_ofs,
941 IPU_CONF_DI1_EN, ipu_clk);
942 if (ret) {
943 unit = "di1";
944 goto err_di_1;
945 }
946
947 ret = ipu_dc_init(ipu, dev, ipu_base + devtype->cm_ofs +
948 IPU_CM_DC_REG_OFS, ipu_base + devtype->dc_tmpl_ofs);
949 if (ret) {
950 unit = "dc_template";
951 goto err_dc;
952 }
953
954 ret = ipu_dmfc_init(ipu, dev, ipu_base +
955 devtype->cm_ofs + IPU_CM_DMFC_REG_OFS, ipu_clk);
956 if (ret) {
957 unit = "dmfc";
958 goto err_dmfc;
959 }
960
961 ret = ipu_dp_init(ipu, dev, ipu_base + devtype->srm_ofs);
962 if (ret) {
963 unit = "dp";
964 goto err_dp;
965 }
966
967 ret = ipu_smfc_init(ipu, dev, ipu_base +
968 devtype->cm_ofs + IPU_CM_SMFC_REG_OFS);
969 if (ret) {
970 unit = "smfc";
971 goto err_smfc;
972 }
973
974 return 0;
975
976 err_smfc:
977 ipu_dp_exit(ipu);
978 err_dp:
979 ipu_dmfc_exit(ipu);
980 err_dmfc:
981 ipu_dc_exit(ipu);
982 err_dc:
983 ipu_di_exit(ipu, 1);
984 err_di_1:
985 ipu_di_exit(ipu, 0);
986 err_di_0:
987 ipu_image_convert_exit(ipu);
988 err_image_convert:
989 ipu_vdi_exit(ipu);
990 err_vdi:
991 ipu_ic_exit(ipu);
992 err_ic:
993 ipu_csi_exit(ipu, 1);
994 err_csi_1:
995 ipu_csi_exit(ipu, 0);
996 err_csi_0:
997 ipu_cpmem_exit(ipu);
998 err_cpmem:
999 dev_err(&pdev->dev, "init %s failed with %d\n", unit, ret);
1000 return ret;
1001 }
1002
ipu_irq_handle(struct ipu_soc * ipu,const int * regs,int num_regs)1003 static void ipu_irq_handle(struct ipu_soc *ipu, const int *regs, int num_regs)
1004 {
1005 unsigned long status;
1006 int i, bit;
1007
1008 for (i = 0; i < num_regs; i++) {
1009
1010 status = ipu_cm_read(ipu, IPU_INT_STAT(regs[i]));
1011 status &= ipu_cm_read(ipu, IPU_INT_CTRL(regs[i]));
1012
1013 for_each_set_bit(bit, &status, 32)
1014 generic_handle_domain_irq(ipu->domain,
1015 regs[i] * 32 + bit);
1016 }
1017 }
1018
ipu_irq_handler(struct irq_desc * desc)1019 static void ipu_irq_handler(struct irq_desc *desc)
1020 {
1021 struct ipu_soc *ipu = irq_desc_get_handler_data(desc);
1022 struct irq_chip *chip = irq_desc_get_chip(desc);
1023 static const int int_reg[] = { 0, 1, 2, 3, 10, 11, 12, 13, 14};
1024
1025 chained_irq_enter(chip, desc);
1026
1027 ipu_irq_handle(ipu, int_reg, ARRAY_SIZE(int_reg));
1028
1029 chained_irq_exit(chip, desc);
1030 }
1031
ipu_err_irq_handler(struct irq_desc * desc)1032 static void ipu_err_irq_handler(struct irq_desc *desc)
1033 {
1034 struct ipu_soc *ipu = irq_desc_get_handler_data(desc);
1035 struct irq_chip *chip = irq_desc_get_chip(desc);
1036 static const int int_reg[] = { 4, 5, 8, 9};
1037
1038 chained_irq_enter(chip, desc);
1039
1040 ipu_irq_handle(ipu, int_reg, ARRAY_SIZE(int_reg));
1041
1042 chained_irq_exit(chip, desc);
1043 }
1044
ipu_map_irq(struct ipu_soc * ipu,int irq)1045 int ipu_map_irq(struct ipu_soc *ipu, int irq)
1046 {
1047 int virq;
1048
1049 virq = irq_linear_revmap(ipu->domain, irq);
1050 if (!virq)
1051 virq = irq_create_mapping(ipu->domain, irq);
1052
1053 return virq;
1054 }
1055 EXPORT_SYMBOL_GPL(ipu_map_irq);
1056
ipu_idmac_channel_irq(struct ipu_soc * ipu,struct ipuv3_channel * channel,enum ipu_channel_irq irq_type)1057 int ipu_idmac_channel_irq(struct ipu_soc *ipu, struct ipuv3_channel *channel,
1058 enum ipu_channel_irq irq_type)
1059 {
1060 return ipu_map_irq(ipu, irq_type + channel->num);
1061 }
1062 EXPORT_SYMBOL_GPL(ipu_idmac_channel_irq);
1063
ipu_submodules_exit(struct ipu_soc * ipu)1064 static void ipu_submodules_exit(struct ipu_soc *ipu)
1065 {
1066 ipu_smfc_exit(ipu);
1067 ipu_dp_exit(ipu);
1068 ipu_dmfc_exit(ipu);
1069 ipu_dc_exit(ipu);
1070 ipu_di_exit(ipu, 1);
1071 ipu_di_exit(ipu, 0);
1072 ipu_image_convert_exit(ipu);
1073 ipu_vdi_exit(ipu);
1074 ipu_ic_exit(ipu);
1075 ipu_csi_exit(ipu, 1);
1076 ipu_csi_exit(ipu, 0);
1077 ipu_cpmem_exit(ipu);
1078 }
1079
platform_remove_devices_fn(struct device * dev,void * unused)1080 static int platform_remove_devices_fn(struct device *dev, void *unused)
1081 {
1082 struct platform_device *pdev = to_platform_device(dev);
1083
1084 platform_device_unregister(pdev);
1085
1086 return 0;
1087 }
1088
platform_device_unregister_children(struct platform_device * pdev)1089 static void platform_device_unregister_children(struct platform_device *pdev)
1090 {
1091 device_for_each_child(&pdev->dev, NULL, platform_remove_devices_fn);
1092 }
1093
1094 struct ipu_platform_reg {
1095 struct ipu_client_platformdata pdata;
1096 const char *name;
1097 };
1098
1099 /* These must be in the order of the corresponding device tree port nodes */
1100 static struct ipu_platform_reg client_reg[] = {
1101 {
1102 .pdata = {
1103 .csi = 0,
1104 .dma[0] = IPUV3_CHANNEL_CSI0,
1105 .dma[1] = -EINVAL,
1106 },
1107 .name = "imx-ipuv3-csi",
1108 }, {
1109 .pdata = {
1110 .csi = 1,
1111 .dma[0] = IPUV3_CHANNEL_CSI1,
1112 .dma[1] = -EINVAL,
1113 },
1114 .name = "imx-ipuv3-csi",
1115 }, {
1116 .pdata = {
1117 .di = 0,
1118 .dc = 5,
1119 .dp = IPU_DP_FLOW_SYNC_BG,
1120 .dma[0] = IPUV3_CHANNEL_MEM_BG_SYNC,
1121 .dma[1] = IPUV3_CHANNEL_MEM_FG_SYNC,
1122 },
1123 .name = "imx-ipuv3-crtc",
1124 }, {
1125 .pdata = {
1126 .di = 1,
1127 .dc = 1,
1128 .dp = -EINVAL,
1129 .dma[0] = IPUV3_CHANNEL_MEM_DC_SYNC,
1130 .dma[1] = -EINVAL,
1131 },
1132 .name = "imx-ipuv3-crtc",
1133 },
1134 };
1135
1136 static DEFINE_MUTEX(ipu_client_id_mutex);
1137 static int ipu_client_id;
1138
ipu_add_client_devices(struct ipu_soc * ipu,unsigned long ipu_base)1139 static int ipu_add_client_devices(struct ipu_soc *ipu, unsigned long ipu_base)
1140 {
1141 struct device *dev = ipu->dev;
1142 unsigned i;
1143 int id, ret;
1144
1145 mutex_lock(&ipu_client_id_mutex);
1146 id = ipu_client_id;
1147 ipu_client_id += ARRAY_SIZE(client_reg);
1148 mutex_unlock(&ipu_client_id_mutex);
1149
1150 for (i = 0; i < ARRAY_SIZE(client_reg); i++) {
1151 struct ipu_platform_reg *reg = &client_reg[i];
1152 struct platform_device *pdev;
1153 struct device_node *of_node;
1154
1155 /* Associate subdevice with the corresponding port node */
1156 of_node = of_graph_get_port_by_id(dev->of_node, i);
1157 if (!of_node) {
1158 dev_info(dev,
1159 "no port@%d node in %pOF, not using %s%d\n",
1160 i, dev->of_node,
1161 (i / 2) ? "DI" : "CSI", i % 2);
1162 continue;
1163 }
1164
1165 pdev = platform_device_alloc(reg->name, id++);
1166 if (!pdev) {
1167 ret = -ENOMEM;
1168 of_node_put(of_node);
1169 goto err_register;
1170 }
1171
1172 pdev->dev.parent = dev;
1173
1174 reg->pdata.of_node = of_node;
1175 ret = platform_device_add_data(pdev, ®->pdata,
1176 sizeof(reg->pdata));
1177 if (!ret)
1178 ret = platform_device_add(pdev);
1179 if (ret) {
1180 platform_device_put(pdev);
1181 goto err_register;
1182 }
1183 }
1184
1185 return 0;
1186
1187 err_register:
1188 platform_device_unregister_children(to_platform_device(dev));
1189
1190 return ret;
1191 }
1192
1193
ipu_irq_init(struct ipu_soc * ipu)1194 static int ipu_irq_init(struct ipu_soc *ipu)
1195 {
1196 struct irq_chip_generic *gc;
1197 struct irq_chip_type *ct;
1198 unsigned long unused[IPU_NUM_IRQS / 32] = {
1199 0x400100d0, 0xffe000fd,
1200 0x400100d0, 0xffe000fd,
1201 0x400100d0, 0xffe000fd,
1202 0x4077ffff, 0xffe7e1fd,
1203 0x23fffffe, 0x8880fff0,
1204 0xf98fe7d0, 0xfff81fff,
1205 0x400100d0, 0xffe000fd,
1206 0x00000000,
1207 };
1208 int ret, i;
1209
1210 ipu->domain = irq_domain_add_linear(ipu->dev->of_node, IPU_NUM_IRQS,
1211 &irq_generic_chip_ops, ipu);
1212 if (!ipu->domain) {
1213 dev_err(ipu->dev, "failed to add irq domain\n");
1214 return -ENODEV;
1215 }
1216
1217 ret = irq_alloc_domain_generic_chips(ipu->domain, 32, 1, "IPU",
1218 handle_level_irq, 0, 0, 0);
1219 if (ret < 0) {
1220 dev_err(ipu->dev, "failed to alloc generic irq chips\n");
1221 irq_domain_remove(ipu->domain);
1222 return ret;
1223 }
1224
1225 /* Mask and clear all interrupts */
1226 for (i = 0; i < IPU_NUM_IRQS; i += 32) {
1227 ipu_cm_write(ipu, 0, IPU_INT_CTRL(i / 32));
1228 ipu_cm_write(ipu, ~unused[i / 32], IPU_INT_STAT(i / 32));
1229 }
1230
1231 for (i = 0; i < IPU_NUM_IRQS; i += 32) {
1232 gc = irq_get_domain_generic_chip(ipu->domain, i);
1233 gc->reg_base = ipu->cm_reg;
1234 gc->unused = unused[i / 32];
1235 ct = gc->chip_types;
1236 ct->chip.irq_ack = irq_gc_ack_set_bit;
1237 ct->chip.irq_mask = irq_gc_mask_clr_bit;
1238 ct->chip.irq_unmask = irq_gc_mask_set_bit;
1239 ct->regs.ack = IPU_INT_STAT(i / 32);
1240 ct->regs.mask = IPU_INT_CTRL(i / 32);
1241 }
1242
1243 irq_set_chained_handler_and_data(ipu->irq_sync, ipu_irq_handler, ipu);
1244 irq_set_chained_handler_and_data(ipu->irq_err, ipu_err_irq_handler,
1245 ipu);
1246
1247 return 0;
1248 }
1249
ipu_irq_exit(struct ipu_soc * ipu)1250 static void ipu_irq_exit(struct ipu_soc *ipu)
1251 {
1252 int i, irq;
1253
1254 irq_set_chained_handler_and_data(ipu->irq_err, NULL, NULL);
1255 irq_set_chained_handler_and_data(ipu->irq_sync, NULL, NULL);
1256
1257 /* TODO: remove irq_domain_generic_chips */
1258
1259 for (i = 0; i < IPU_NUM_IRQS; i++) {
1260 irq = irq_linear_revmap(ipu->domain, i);
1261 if (irq)
1262 irq_dispose_mapping(irq);
1263 }
1264
1265 irq_domain_remove(ipu->domain);
1266 }
1267
ipu_dump(struct ipu_soc * ipu)1268 void ipu_dump(struct ipu_soc *ipu)
1269 {
1270 int i;
1271
1272 dev_dbg(ipu->dev, "IPU_CONF = \t0x%08X\n",
1273 ipu_cm_read(ipu, IPU_CONF));
1274 dev_dbg(ipu->dev, "IDMAC_CONF = \t0x%08X\n",
1275 ipu_idmac_read(ipu, IDMAC_CONF));
1276 dev_dbg(ipu->dev, "IDMAC_CHA_EN1 = \t0x%08X\n",
1277 ipu_idmac_read(ipu, IDMAC_CHA_EN(0)));
1278 dev_dbg(ipu->dev, "IDMAC_CHA_EN2 = \t0x%08X\n",
1279 ipu_idmac_read(ipu, IDMAC_CHA_EN(32)));
1280 dev_dbg(ipu->dev, "IDMAC_CHA_PRI1 = \t0x%08X\n",
1281 ipu_idmac_read(ipu, IDMAC_CHA_PRI(0)));
1282 dev_dbg(ipu->dev, "IDMAC_CHA_PRI2 = \t0x%08X\n",
1283 ipu_idmac_read(ipu, IDMAC_CHA_PRI(32)));
1284 dev_dbg(ipu->dev, "IDMAC_BAND_EN1 = \t0x%08X\n",
1285 ipu_idmac_read(ipu, IDMAC_BAND_EN(0)));
1286 dev_dbg(ipu->dev, "IDMAC_BAND_EN2 = \t0x%08X\n",
1287 ipu_idmac_read(ipu, IDMAC_BAND_EN(32)));
1288 dev_dbg(ipu->dev, "IPU_CHA_DB_MODE_SEL0 = \t0x%08X\n",
1289 ipu_cm_read(ipu, IPU_CHA_DB_MODE_SEL(0)));
1290 dev_dbg(ipu->dev, "IPU_CHA_DB_MODE_SEL1 = \t0x%08X\n",
1291 ipu_cm_read(ipu, IPU_CHA_DB_MODE_SEL(32)));
1292 dev_dbg(ipu->dev, "IPU_FS_PROC_FLOW1 = \t0x%08X\n",
1293 ipu_cm_read(ipu, IPU_FS_PROC_FLOW1));
1294 dev_dbg(ipu->dev, "IPU_FS_PROC_FLOW2 = \t0x%08X\n",
1295 ipu_cm_read(ipu, IPU_FS_PROC_FLOW2));
1296 dev_dbg(ipu->dev, "IPU_FS_PROC_FLOW3 = \t0x%08X\n",
1297 ipu_cm_read(ipu, IPU_FS_PROC_FLOW3));
1298 dev_dbg(ipu->dev, "IPU_FS_DISP_FLOW1 = \t0x%08X\n",
1299 ipu_cm_read(ipu, IPU_FS_DISP_FLOW1));
1300 for (i = 0; i < 15; i++)
1301 dev_dbg(ipu->dev, "IPU_INT_CTRL(%d) = \t%08X\n", i,
1302 ipu_cm_read(ipu, IPU_INT_CTRL(i)));
1303 }
1304 EXPORT_SYMBOL_GPL(ipu_dump);
1305
ipu_probe(struct platform_device * pdev)1306 static int ipu_probe(struct platform_device *pdev)
1307 {
1308 struct device_node *np = pdev->dev.of_node;
1309 struct ipu_soc *ipu;
1310 struct resource *res;
1311 unsigned long ipu_base;
1312 int ret, irq_sync, irq_err;
1313 const struct ipu_devtype *devtype;
1314
1315 devtype = of_device_get_match_data(&pdev->dev);
1316 if (!devtype)
1317 return -EINVAL;
1318
1319 irq_sync = platform_get_irq(pdev, 0);
1320 irq_err = platform_get_irq(pdev, 1);
1321 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1322
1323 dev_dbg(&pdev->dev, "irq_sync: %d irq_err: %d\n",
1324 irq_sync, irq_err);
1325
1326 if (!res || irq_sync < 0 || irq_err < 0)
1327 return -ENODEV;
1328
1329 ipu_base = res->start;
1330
1331 ipu = devm_kzalloc(&pdev->dev, sizeof(*ipu), GFP_KERNEL);
1332 if (!ipu)
1333 return -ENODEV;
1334
1335 ipu->id = of_alias_get_id(np, "ipu");
1336 if (ipu->id < 0)
1337 ipu->id = 0;
1338
1339 if (of_device_is_compatible(np, "fsl,imx6qp-ipu") &&
1340 IS_ENABLED(CONFIG_DRM)) {
1341 ipu->prg_priv = ipu_prg_lookup_by_phandle(&pdev->dev,
1342 "fsl,prg", ipu->id);
1343 if (!ipu->prg_priv)
1344 return -EPROBE_DEFER;
1345 }
1346
1347 ipu->devtype = devtype;
1348 ipu->ipu_type = devtype->type;
1349
1350 spin_lock_init(&ipu->lock);
1351 mutex_init(&ipu->channel_lock);
1352 INIT_LIST_HEAD(&ipu->channels);
1353
1354 dev_dbg(&pdev->dev, "cm_reg: 0x%08lx\n",
1355 ipu_base + devtype->cm_ofs);
1356 dev_dbg(&pdev->dev, "idmac: 0x%08lx\n",
1357 ipu_base + devtype->cm_ofs + IPU_CM_IDMAC_REG_OFS);
1358 dev_dbg(&pdev->dev, "cpmem: 0x%08lx\n",
1359 ipu_base + devtype->cpmem_ofs);
1360 dev_dbg(&pdev->dev, "csi0: 0x%08lx\n",
1361 ipu_base + devtype->csi0_ofs);
1362 dev_dbg(&pdev->dev, "csi1: 0x%08lx\n",
1363 ipu_base + devtype->csi1_ofs);
1364 dev_dbg(&pdev->dev, "ic: 0x%08lx\n",
1365 ipu_base + devtype->ic_ofs);
1366 dev_dbg(&pdev->dev, "disp0: 0x%08lx\n",
1367 ipu_base + devtype->disp0_ofs);
1368 dev_dbg(&pdev->dev, "disp1: 0x%08lx\n",
1369 ipu_base + devtype->disp1_ofs);
1370 dev_dbg(&pdev->dev, "srm: 0x%08lx\n",
1371 ipu_base + devtype->srm_ofs);
1372 dev_dbg(&pdev->dev, "tpm: 0x%08lx\n",
1373 ipu_base + devtype->tpm_ofs);
1374 dev_dbg(&pdev->dev, "dc: 0x%08lx\n",
1375 ipu_base + devtype->cm_ofs + IPU_CM_DC_REG_OFS);
1376 dev_dbg(&pdev->dev, "ic: 0x%08lx\n",
1377 ipu_base + devtype->cm_ofs + IPU_CM_IC_REG_OFS);
1378 dev_dbg(&pdev->dev, "dmfc: 0x%08lx\n",
1379 ipu_base + devtype->cm_ofs + IPU_CM_DMFC_REG_OFS);
1380 dev_dbg(&pdev->dev, "vdi: 0x%08lx\n",
1381 ipu_base + devtype->vdi_ofs);
1382
1383 ipu->cm_reg = devm_ioremap(&pdev->dev,
1384 ipu_base + devtype->cm_ofs, PAGE_SIZE);
1385 ipu->idmac_reg = devm_ioremap(&pdev->dev,
1386 ipu_base + devtype->cm_ofs + IPU_CM_IDMAC_REG_OFS,
1387 PAGE_SIZE);
1388
1389 if (!ipu->cm_reg || !ipu->idmac_reg)
1390 return -ENOMEM;
1391
1392 ipu->clk = devm_clk_get(&pdev->dev, "bus");
1393 if (IS_ERR(ipu->clk)) {
1394 ret = PTR_ERR(ipu->clk);
1395 dev_err(&pdev->dev, "clk_get failed with %d", ret);
1396 return ret;
1397 }
1398
1399 platform_set_drvdata(pdev, ipu);
1400
1401 ret = clk_prepare_enable(ipu->clk);
1402 if (ret) {
1403 dev_err(&pdev->dev, "clk_prepare_enable failed: %d\n", ret);
1404 return ret;
1405 }
1406
1407 ipu->dev = &pdev->dev;
1408 ipu->irq_sync = irq_sync;
1409 ipu->irq_err = irq_err;
1410
1411 ret = device_reset(&pdev->dev);
1412 if (ret) {
1413 dev_err(&pdev->dev, "failed to reset: %d\n", ret);
1414 goto out_failed_reset;
1415 }
1416 ret = ipu_memory_reset(ipu);
1417 if (ret)
1418 goto out_failed_reset;
1419
1420 ret = ipu_irq_init(ipu);
1421 if (ret)
1422 goto out_failed_irq;
1423
1424 /* Set MCU_T to divide MCU access window into 2 */
1425 ipu_cm_write(ipu, 0x00400000L | (IPU_MCU_T_DEFAULT << 18),
1426 IPU_DISP_GEN);
1427
1428 ret = ipu_submodules_init(ipu, pdev, ipu_base, ipu->clk);
1429 if (ret)
1430 goto failed_submodules_init;
1431
1432 ret = ipu_add_client_devices(ipu, ipu_base);
1433 if (ret) {
1434 dev_err(&pdev->dev, "adding client devices failed with %d\n",
1435 ret);
1436 goto failed_add_clients;
1437 }
1438
1439 dev_info(&pdev->dev, "%s probed\n", devtype->name);
1440
1441 return 0;
1442
1443 failed_add_clients:
1444 ipu_submodules_exit(ipu);
1445 failed_submodules_init:
1446 ipu_irq_exit(ipu);
1447 out_failed_irq:
1448 out_failed_reset:
1449 clk_disable_unprepare(ipu->clk);
1450 return ret;
1451 }
1452
ipu_remove(struct platform_device * pdev)1453 static int ipu_remove(struct platform_device *pdev)
1454 {
1455 struct ipu_soc *ipu = platform_get_drvdata(pdev);
1456
1457 platform_device_unregister_children(pdev);
1458 ipu_submodules_exit(ipu);
1459 ipu_irq_exit(ipu);
1460
1461 clk_disable_unprepare(ipu->clk);
1462
1463 return 0;
1464 }
1465
1466 static struct platform_driver imx_ipu_driver = {
1467 .driver = {
1468 .name = "imx-ipuv3",
1469 .of_match_table = imx_ipu_dt_ids,
1470 },
1471 .probe = ipu_probe,
1472 .remove = ipu_remove,
1473 };
1474
1475 static struct platform_driver * const drivers[] = {
1476 #if IS_ENABLED(CONFIG_DRM)
1477 &ipu_pre_drv,
1478 &ipu_prg_drv,
1479 #endif
1480 &imx_ipu_driver,
1481 };
1482
imx_ipu_init(void)1483 static int __init imx_ipu_init(void)
1484 {
1485 return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
1486 }
1487 module_init(imx_ipu_init);
1488
imx_ipu_exit(void)1489 static void __exit imx_ipu_exit(void)
1490 {
1491 platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
1492 }
1493 module_exit(imx_ipu_exit);
1494
1495 MODULE_ALIAS("platform:imx-ipuv3");
1496 MODULE_DESCRIPTION("i.MX IPU v3 driver");
1497 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
1498 MODULE_LICENSE("GPL");
1499