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OMAPDSS: VENC: fix NULL pointer dereference in DSS2 VENC sysfs debug attr on OMAP4
[zen-stable.git] / drivers / video / omap2 / dss / rfbi.c
blob55f398014f33b31863e0718a6600c25c368bac8e
1 /*
2 * linux/drivers/video/omap2/dss/rfbi.c
3 *
4 * Copyright (C) 2009 Nokia Corporation
5 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
6 *
7 * Some code and ideas taken from drivers/video/omap/ driver
8 * by Imre Deak.
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License version 2 as published by
12 * the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful, but WITHOUT
15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
17 * more details.
18 *
19 * You should have received a copy of the GNU General Public License along with
20 * this program. If not, see <http://www.gnu.org/licenses/>.
21 */
22
23 #define DSS_SUBSYS_NAME "RFBI"
24
25 #include <linux/kernel.h>
26 #include <linux/dma-mapping.h>
27 #include <linux/export.h>
28 #include <linux/vmalloc.h>
29 #include <linux/clk.h>
30 #include <linux/io.h>
31 #include <linux/delay.h>
32 #include <linux/kfifo.h>
33 #include <linux/ktime.h>
34 #include <linux/hrtimer.h>
35 #include <linux/seq_file.h>
36 #include <linux/semaphore.h>
37 #include <linux/platform_device.h>
38 #include <linux/pm_runtime.h>
39
40 #include <video/omapdss.h>
41 #include "dss.h"
42
43 struct rfbi_reg { u16 idx; };
44
45 #define RFBI_REG(idx) ((const struct rfbi_reg) { idx })
46
47 #define RFBI_REVISION RFBI_REG(0x0000)
48 #define RFBI_SYSCONFIG RFBI_REG(0x0010)
49 #define RFBI_SYSSTATUS RFBI_REG(0x0014)
50 #define RFBI_CONTROL RFBI_REG(0x0040)
51 #define RFBI_PIXEL_CNT RFBI_REG(0x0044)
52 #define RFBI_LINE_NUMBER RFBI_REG(0x0048)
53 #define RFBI_CMD RFBI_REG(0x004c)
54 #define RFBI_PARAM RFBI_REG(0x0050)
55 #define RFBI_DATA RFBI_REG(0x0054)
56 #define RFBI_READ RFBI_REG(0x0058)
57 #define RFBI_STATUS RFBI_REG(0x005c)
58
59 #define RFBI_CONFIG(n) RFBI_REG(0x0060 + (n)*0x18)
60 #define RFBI_ONOFF_TIME(n) RFBI_REG(0x0064 + (n)*0x18)
61 #define RFBI_CYCLE_TIME(n) RFBI_REG(0x0068 + (n)*0x18)
62 #define RFBI_DATA_CYCLE1(n) RFBI_REG(0x006c + (n)*0x18)
63 #define RFBI_DATA_CYCLE2(n) RFBI_REG(0x0070 + (n)*0x18)
64 #define RFBI_DATA_CYCLE3(n) RFBI_REG(0x0074 + (n)*0x18)
65
66 #define RFBI_VSYNC_WIDTH RFBI_REG(0x0090)
67 #define RFBI_HSYNC_WIDTH RFBI_REG(0x0094)
68
69 #define REG_FLD_MOD(idx, val, start, end) \
70 rfbi_write_reg(idx, FLD_MOD(rfbi_read_reg(idx), val, start, end))
71
72 enum omap_rfbi_cycleformat {
73 OMAP_DSS_RFBI_CYCLEFORMAT_1_1 = 0,
74 OMAP_DSS_RFBI_CYCLEFORMAT_2_1 = 1,
75 OMAP_DSS_RFBI_CYCLEFORMAT_3_1 = 2,
76 OMAP_DSS_RFBI_CYCLEFORMAT_3_2 = 3,
77 };
78
79 enum omap_rfbi_datatype {
80 OMAP_DSS_RFBI_DATATYPE_12 = 0,
81 OMAP_DSS_RFBI_DATATYPE_16 = 1,
82 OMAP_DSS_RFBI_DATATYPE_18 = 2,
83 OMAP_DSS_RFBI_DATATYPE_24 = 3,
84 };
85
86 enum omap_rfbi_parallelmode {
87 OMAP_DSS_RFBI_PARALLELMODE_8 = 0,
88 OMAP_DSS_RFBI_PARALLELMODE_9 = 1,
89 OMAP_DSS_RFBI_PARALLELMODE_12 = 2,
90 OMAP_DSS_RFBI_PARALLELMODE_16 = 3,
91 };
92
93 static int rfbi_convert_timings(struct rfbi_timings *t);
94 static void rfbi_get_clk_info(u32 *clk_period, u32 *max_clk_div);
95
96 static struct {
97 struct platform_device *pdev;
98 void __iomem *base;
99
100 unsigned long l4_khz;
101
102 enum omap_rfbi_datatype datatype;
103 enum omap_rfbi_parallelmode parallelmode;
104
105 enum omap_rfbi_te_mode te_mode;
106 int te_enabled;
107
108 void (*framedone_callback)(void *data);
109 void *framedone_callback_data;
110
111 struct omap_dss_device *dssdev[2];
112
113 struct semaphore bus_lock;
114 } rfbi;
115
116 static inline void rfbi_write_reg(const struct rfbi_reg idx, u32 val)
117 {
118 __raw_writel(val, rfbi.base + idx.idx);
119 }
120
121 static inline u32 rfbi_read_reg(const struct rfbi_reg idx)
122 {
123 return __raw_readl(rfbi.base + idx.idx);
124 }
125
126 static int rfbi_runtime_get(void)
127 {
128 int r;
129
130 DSSDBG("rfbi_runtime_get\n");
131
132 r = pm_runtime_get_sync(&rfbi.pdev->dev);
133 WARN_ON(r < 0);
134 return r < 0 ? r : 0;
135 }
136
137 static void rfbi_runtime_put(void)
138 {
139 int r;
140
141 DSSDBG("rfbi_runtime_put\n");
142
143 r = pm_runtime_put_sync(&rfbi.pdev->dev);
144 WARN_ON(r < 0);
145 }
146
147 void rfbi_bus_lock(void)
148 {
149 down(&rfbi.bus_lock);
150 }
151 EXPORT_SYMBOL(rfbi_bus_lock);
152
153 void rfbi_bus_unlock(void)
154 {
155 up(&rfbi.bus_lock);
156 }
157 EXPORT_SYMBOL(rfbi_bus_unlock);
158
159 void omap_rfbi_write_command(const void *buf, u32 len)
160 {
161 switch (rfbi.parallelmode) {
162 case OMAP_DSS_RFBI_PARALLELMODE_8:
163 {
164 const u8 *b = buf;
165 for (; len; len--)
166 rfbi_write_reg(RFBI_CMD, *b++);
167 break;
168 }
169
170 case OMAP_DSS_RFBI_PARALLELMODE_16:
171 {
172 const u16 *w = buf;
173 BUG_ON(len & 1);
174 for (; len; len -= 2)
175 rfbi_write_reg(RFBI_CMD, *w++);
176 break;
177 }
178
179 case OMAP_DSS_RFBI_PARALLELMODE_9:
180 case OMAP_DSS_RFBI_PARALLELMODE_12:
181 default:
182 BUG();
183 }
184 }
185 EXPORT_SYMBOL(omap_rfbi_write_command);
186
187 void omap_rfbi_read_data(void *buf, u32 len)
188 {
189 switch (rfbi.parallelmode) {
190 case OMAP_DSS_RFBI_PARALLELMODE_8:
191 {
192 u8 *b = buf;
193 for (; len; len--) {
194 rfbi_write_reg(RFBI_READ, 0);
195 *b++ = rfbi_read_reg(RFBI_READ);
196 }
197 break;
198 }
199
200 case OMAP_DSS_RFBI_PARALLELMODE_16:
201 {
202 u16 *w = buf;
203 BUG_ON(len & ~1);
204 for (; len; len -= 2) {
205 rfbi_write_reg(RFBI_READ, 0);
206 *w++ = rfbi_read_reg(RFBI_READ);
207 }
208 break;
209 }
210
211 case OMAP_DSS_RFBI_PARALLELMODE_9:
212 case OMAP_DSS_RFBI_PARALLELMODE_12:
213 default:
214 BUG();
215 }
216 }
217 EXPORT_SYMBOL(omap_rfbi_read_data);
218
219 void omap_rfbi_write_data(const void *buf, u32 len)
220 {
221 switch (rfbi.parallelmode) {
222 case OMAP_DSS_RFBI_PARALLELMODE_8:
223 {
224 const u8 *b = buf;
225 for (; len; len--)
226 rfbi_write_reg(RFBI_PARAM, *b++);
227 break;
228 }
229
230 case OMAP_DSS_RFBI_PARALLELMODE_16:
231 {
232 const u16 *w = buf;
233 BUG_ON(len & 1);
234 for (; len; len -= 2)
235 rfbi_write_reg(RFBI_PARAM, *w++);
236 break;
237 }
238
239 case OMAP_DSS_RFBI_PARALLELMODE_9:
240 case OMAP_DSS_RFBI_PARALLELMODE_12:
241 default:
242 BUG();
243
244 }
245 }
246 EXPORT_SYMBOL(omap_rfbi_write_data);
247
248 void omap_rfbi_write_pixels(const void __iomem *buf, int scr_width,
249 u16 x, u16 y,
250 u16 w, u16 h)
251 {
252 int start_offset = scr_width * y + x;
253 int horiz_offset = scr_width - w;
254 int i;
255
256 if (rfbi.datatype == OMAP_DSS_RFBI_DATATYPE_16 &&
257 rfbi.parallelmode == OMAP_DSS_RFBI_PARALLELMODE_8) {
258 const u16 __iomem *pd = buf;
259 pd += start_offset;
260
261 for (; h; --h) {
262 for (i = 0; i < w; ++i) {
263 const u8 __iomem *b = (const u8 __iomem *)pd;
264 rfbi_write_reg(RFBI_PARAM, __raw_readb(b+1));
265 rfbi_write_reg(RFBI_PARAM, __raw_readb(b+0));
266 ++pd;
267 }
268 pd += horiz_offset;
269 }
270 } else if (rfbi.datatype == OMAP_DSS_RFBI_DATATYPE_24 &&
271 rfbi.parallelmode == OMAP_DSS_RFBI_PARALLELMODE_8) {
272 const u32 __iomem *pd = buf;
273 pd += start_offset;
274
275 for (; h; --h) {
276 for (i = 0; i < w; ++i) {
277 const u8 __iomem *b = (const u8 __iomem *)pd;
278 rfbi_write_reg(RFBI_PARAM, __raw_readb(b+2));
279 rfbi_write_reg(RFBI_PARAM, __raw_readb(b+1));
280 rfbi_write_reg(RFBI_PARAM, __raw_readb(b+0));
281 ++pd;
282 }
283 pd += horiz_offset;
284 }
285 } else if (rfbi.datatype == OMAP_DSS_RFBI_DATATYPE_16 &&
286 rfbi.parallelmode == OMAP_DSS_RFBI_PARALLELMODE_16) {
287 const u16 __iomem *pd = buf;
288 pd += start_offset;
289
290 for (; h; --h) {
291 for (i = 0; i < w; ++i) {
292 rfbi_write_reg(RFBI_PARAM, __raw_readw(pd));
293 ++pd;
294 }
295 pd += horiz_offset;
296 }
297 } else {
298 BUG();
299 }
300 }
301 EXPORT_SYMBOL(omap_rfbi_write_pixels);
302
303 static void rfbi_transfer_area(struct omap_dss_device *dssdev, u16 width,
304 u16 height, void (*callback)(void *data), void *data)
305 {
306 u32 l;
307
308 /*BUG_ON(callback == 0);*/
309 BUG_ON(rfbi.framedone_callback != NULL);
310
311 DSSDBG("rfbi_transfer_area %dx%d\n", width, height);
312
313 dispc_mgr_set_lcd_size(dssdev->manager->id, width, height);
314
315 dispc_mgr_enable(dssdev->manager->id, true);
316
317 rfbi.framedone_callback = callback;
318 rfbi.framedone_callback_data = data;
319
320 rfbi_write_reg(RFBI_PIXEL_CNT, width * height);
321
322 l = rfbi_read_reg(RFBI_CONTROL);
323 l = FLD_MOD(l, 1, 0, 0); /* enable */
324 if (!rfbi.te_enabled)
325 l = FLD_MOD(l, 1, 4, 4); /* ITE */
326
327 rfbi_write_reg(RFBI_CONTROL, l);
328 }
329
330 static void framedone_callback(void *data, u32 mask)
331 {
332 void (*callback)(void *data);
333
334 DSSDBG("FRAMEDONE\n");
335
336 REG_FLD_MOD(RFBI_CONTROL, 0, 0, 0);
337
338 callback = rfbi.framedone_callback;
339 rfbi.framedone_callback = NULL;
340
341 if (callback != NULL)
342 callback(rfbi.framedone_callback_data);
343 }
344
345 #if 1 /* VERBOSE */
346 static void rfbi_print_timings(void)
347 {
348 u32 l;
349 u32 time;
350
351 l = rfbi_read_reg(RFBI_CONFIG(0));
352 time = 1000000000 / rfbi.l4_khz;
353 if (l & (1 << 4))
354 time *= 2;
355
356 DSSDBG("Tick time %u ps\n", time);
357 l = rfbi_read_reg(RFBI_ONOFF_TIME(0));
358 DSSDBG("CSONTIME %d, CSOFFTIME %d, WEONTIME %d, WEOFFTIME %d, "
359 "REONTIME %d, REOFFTIME %d\n",
360 l & 0x0f, (l >> 4) & 0x3f, (l >> 10) & 0x0f, (l >> 14) & 0x3f,
361 (l >> 20) & 0x0f, (l >> 24) & 0x3f);
362
363 l = rfbi_read_reg(RFBI_CYCLE_TIME(0));
364 DSSDBG("WECYCLETIME %d, RECYCLETIME %d, CSPULSEWIDTH %d, "
365 "ACCESSTIME %d\n",
366 (l & 0x3f), (l >> 6) & 0x3f, (l >> 12) & 0x3f,
367 (l >> 22) & 0x3f);
368 }
369 #else
370 static void rfbi_print_timings(void) {}
371 #endif
372
373
374
375
376 static u32 extif_clk_period;
377
378 static inline unsigned long round_to_extif_ticks(unsigned long ps, int div)
379 {
380 int bus_tick = extif_clk_period * div;
381 return (ps + bus_tick - 1) / bus_tick * bus_tick;
382 }
383
384 static int calc_reg_timing(struct rfbi_timings *t, int div)
385 {
386 t->clk_div = div;
387
388 t->cs_on_time = round_to_extif_ticks(t->cs_on_time, div);
389
390 t->we_on_time = round_to_extif_ticks(t->we_on_time, div);
391 t->we_off_time = round_to_extif_ticks(t->we_off_time, div);
392 t->we_cycle_time = round_to_extif_ticks(t->we_cycle_time, div);
393
394 t->re_on_time = round_to_extif_ticks(t->re_on_time, div);
395 t->re_off_time = round_to_extif_ticks(t->re_off_time, div);
396 t->re_cycle_time = round_to_extif_ticks(t->re_cycle_time, div);
397
398 t->access_time = round_to_extif_ticks(t->access_time, div);
399 t->cs_off_time = round_to_extif_ticks(t->cs_off_time, div);
400 t->cs_pulse_width = round_to_extif_ticks(t->cs_pulse_width, div);
401
402 DSSDBG("[reg]cson %d csoff %d reon %d reoff %d\n",
403 t->cs_on_time, t->cs_off_time, t->re_on_time, t->re_off_time);
404 DSSDBG("[reg]weon %d weoff %d recyc %d wecyc %d\n",
405 t->we_on_time, t->we_off_time, t->re_cycle_time,
406 t->we_cycle_time);
407 DSSDBG("[reg]rdaccess %d cspulse %d\n",
408 t->access_time, t->cs_pulse_width);
409
410 return rfbi_convert_timings(t);
411 }
412
413 static int calc_extif_timings(struct rfbi_timings *t)
414 {
415 u32 max_clk_div;
416 int div;
417
418 rfbi_get_clk_info(&extif_clk_period, &max_clk_div);
419 for (div = 1; div <= max_clk_div; div++) {
420 if (calc_reg_timing(t, div) == 0)
421 break;
422 }
423
424 if (div <= max_clk_div)
425 return 0;
426
427 DSSERR("can't setup timings\n");
428 return -1;
429 }
430
431
432 static void rfbi_set_timings(int rfbi_module, struct rfbi_timings *t)
433 {
434 int r;
435
436 if (!t->converted) {
437 r = calc_extif_timings(t);
438 if (r < 0)
439 DSSERR("Failed to calc timings\n");
440 }
441
442 BUG_ON(!t->converted);
443
444 rfbi_write_reg(RFBI_ONOFF_TIME(rfbi_module), t->tim[0]);
445 rfbi_write_reg(RFBI_CYCLE_TIME(rfbi_module), t->tim[1]);
446
447 /* TIMEGRANULARITY */
448 REG_FLD_MOD(RFBI_CONFIG(rfbi_module),
449 (t->tim[2] ? 1 : 0), 4, 4);
450
451 rfbi_print_timings();
452 }
453
454 static int ps_to_rfbi_ticks(int time, int div)
455 {
456 unsigned long tick_ps;
457 int ret;
458
459 /* Calculate in picosecs to yield more exact results */
460 tick_ps = 1000000000 / (rfbi.l4_khz) * div;
461
462 ret = (time + tick_ps - 1) / tick_ps;
463
464 return ret;
465 }
466
467 static void rfbi_get_clk_info(u32 *clk_period, u32 *max_clk_div)
468 {
469 *clk_period = 1000000000 / rfbi.l4_khz;
470 *max_clk_div = 2;
471 }
472
473 static int rfbi_convert_timings(struct rfbi_timings *t)
474 {
475 u32 l;
476 int reon, reoff, weon, weoff, cson, csoff, cs_pulse;
477 int actim, recyc, wecyc;
478 int div = t->clk_div;
479
480 if (div <= 0 || div > 2)
481 return -1;
482
483 /* Make sure that after conversion it still holds that:
484 * weoff > weon, reoff > reon, recyc >= reoff, wecyc >= weoff,
485 * csoff > cson, csoff >= max(weoff, reoff), actim > reon
486 */
487 weon = ps_to_rfbi_ticks(t->we_on_time, div);
488 weoff = ps_to_rfbi_ticks(t->we_off_time, div);
489 if (weoff <= weon)
490 weoff = weon + 1;
491 if (weon > 0x0f)
492 return -1;
493 if (weoff > 0x3f)
494 return -1;
495
496 reon = ps_to_rfbi_ticks(t->re_on_time, div);
497 reoff = ps_to_rfbi_ticks(t->re_off_time, div);
498 if (reoff <= reon)
499 reoff = reon + 1;
500 if (reon > 0x0f)
501 return -1;
502 if (reoff > 0x3f)
503 return -1;
504
505 cson = ps_to_rfbi_ticks(t->cs_on_time, div);
506 csoff = ps_to_rfbi_ticks(t->cs_off_time, div);
507 if (csoff <= cson)
508 csoff = cson + 1;
509 if (csoff < max(weoff, reoff))
510 csoff = max(weoff, reoff);
511 if (cson > 0x0f)
512 return -1;
513 if (csoff > 0x3f)
514 return -1;
515
516 l = cson;
517 l |= csoff << 4;
518 l |= weon << 10;
519 l |= weoff << 14;
520 l |= reon << 20;
521 l |= reoff << 24;
522
523 t->tim[0] = l;
524
525 actim = ps_to_rfbi_ticks(t->access_time, div);
526 if (actim <= reon)
527 actim = reon + 1;
528 if (actim > 0x3f)
529 return -1;
530
531 wecyc = ps_to_rfbi_ticks(t->we_cycle_time, div);
532 if (wecyc < weoff)
533 wecyc = weoff;
534 if (wecyc > 0x3f)
535 return -1;
536
537 recyc = ps_to_rfbi_ticks(t->re_cycle_time, div);
538 if (recyc < reoff)
539 recyc = reoff;
540 if (recyc > 0x3f)
541 return -1;
542
543 cs_pulse = ps_to_rfbi_ticks(t->cs_pulse_width, div);
544 if (cs_pulse > 0x3f)
545 return -1;
546
547 l = wecyc;
548 l |= recyc << 6;
549 l |= cs_pulse << 12;
550 l |= actim << 22;
551
552 t->tim[1] = l;
553
554 t->tim[2] = div - 1;
555
556 t->converted = 1;
557
558 return 0;
559 }
560
561 /* xxx FIX module selection missing */
562 int omap_rfbi_setup_te(enum omap_rfbi_te_mode mode,
563 unsigned hs_pulse_time, unsigned vs_pulse_time,
564 int hs_pol_inv, int vs_pol_inv, int extif_div)
565 {
566 int hs, vs;
567 int min;
568 u32 l;
569
570 hs = ps_to_rfbi_ticks(hs_pulse_time, 1);
571 vs = ps_to_rfbi_ticks(vs_pulse_time, 1);
572 if (hs < 2)
573 return -EDOM;
574 if (mode == OMAP_DSS_RFBI_TE_MODE_2)
575 min = 2;
576 else /* OMAP_DSS_RFBI_TE_MODE_1 */
577 min = 4;
578 if (vs < min)
579 return -EDOM;
580 if (vs == hs)
581 return -EINVAL;
582 rfbi.te_mode = mode;
583 DSSDBG("setup_te: mode %d hs %d vs %d hs_inv %d vs_inv %d\n",
584 mode, hs, vs, hs_pol_inv, vs_pol_inv);
585
586 rfbi_write_reg(RFBI_HSYNC_WIDTH, hs);
587 rfbi_write_reg(RFBI_VSYNC_WIDTH, vs);
588
589 l = rfbi_read_reg(RFBI_CONFIG(0));
590 if (hs_pol_inv)
591 l &= ~(1 << 21);
592 else
593 l |= 1 << 21;
594 if (vs_pol_inv)
595 l &= ~(1 << 20);
596 else
597 l |= 1 << 20;
598
599 return 0;
600 }
601 EXPORT_SYMBOL(omap_rfbi_setup_te);
602
603 /* xxx FIX module selection missing */
604 int omap_rfbi_enable_te(bool enable, unsigned line)
605 {
606 u32 l;
607
608 DSSDBG("te %d line %d mode %d\n", enable, line, rfbi.te_mode);
609 if (line > (1 << 11) - 1)
610 return -EINVAL;
611
612 l = rfbi_read_reg(RFBI_CONFIG(0));
613 l &= ~(0x3 << 2);
614 if (enable) {
615 rfbi.te_enabled = 1;
616 l |= rfbi.te_mode << 2;
617 } else
618 rfbi.te_enabled = 0;
619 rfbi_write_reg(RFBI_CONFIG(0), l);
620 rfbi_write_reg(RFBI_LINE_NUMBER, line);
621
622 return 0;
623 }
624 EXPORT_SYMBOL(omap_rfbi_enable_te);
625
626 static int rfbi_configure(int rfbi_module, int bpp, int lines)
627 {
628 u32 l;
629 int cycle1 = 0, cycle2 = 0, cycle3 = 0;
630 enum omap_rfbi_cycleformat cycleformat;
631 enum omap_rfbi_datatype datatype;
632 enum omap_rfbi_parallelmode parallelmode;
633
634 switch (bpp) {
635 case 12:
636 datatype = OMAP_DSS_RFBI_DATATYPE_12;
637 break;
638 case 16:
639 datatype = OMAP_DSS_RFBI_DATATYPE_16;
640 break;
641 case 18:
642 datatype = OMAP_DSS_RFBI_DATATYPE_18;
643 break;
644 case 24:
645 datatype = OMAP_DSS_RFBI_DATATYPE_24;
646 break;
647 default:
648 BUG();
649 return 1;
650 }
651 rfbi.datatype = datatype;
652
653 switch (lines) {
654 case 8:
655 parallelmode = OMAP_DSS_RFBI_PARALLELMODE_8;
656 break;
657 case 9:
658 parallelmode = OMAP_DSS_RFBI_PARALLELMODE_9;
659 break;
660 case 12:
661 parallelmode = OMAP_DSS_RFBI_PARALLELMODE_12;
662 break;
663 case 16:
664 parallelmode = OMAP_DSS_RFBI_PARALLELMODE_16;
665 break;
666 default:
667 BUG();
668 return 1;
669 }
670 rfbi.parallelmode = parallelmode;
671
672 if ((bpp % lines) == 0) {
673 switch (bpp / lines) {
674 case 1:
675 cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_1_1;
676 break;
677 case 2:
678 cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_2_1;
679 break;
680 case 3:
681 cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_3_1;
682 break;
683 default:
684 BUG();
685 return 1;
686 }
687 } else if ((2 * bpp % lines) == 0) {
688 if ((2 * bpp / lines) == 3)
689 cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_3_2;
690 else {
691 BUG();
692 return 1;
693 }
694 } else {
695 BUG();
696 return 1;
697 }
698
699 switch (cycleformat) {
700 case OMAP_DSS_RFBI_CYCLEFORMAT_1_1:
701 cycle1 = lines;
702 break;
703
704 case OMAP_DSS_RFBI_CYCLEFORMAT_2_1:
705 cycle1 = lines;
706 cycle2 = lines;
707 break;
708
709 case OMAP_DSS_RFBI_CYCLEFORMAT_3_1:
710 cycle1 = lines;
711 cycle2 = lines;
712 cycle3 = lines;
713 break;
714
715 case OMAP_DSS_RFBI_CYCLEFORMAT_3_2:
716 cycle1 = lines;
717 cycle2 = (lines / 2) | ((lines / 2) << 16);
718 cycle3 = (lines << 16);
719 break;
720 }
721
722 REG_FLD_MOD(RFBI_CONTROL, 0, 3, 2); /* clear CS */
723
724 l = 0;
725 l |= FLD_VAL(parallelmode, 1, 0);
726 l |= FLD_VAL(0, 3, 2); /* TRIGGERMODE: ITE */
727 l |= FLD_VAL(0, 4, 4); /* TIMEGRANULARITY */
728 l |= FLD_VAL(datatype, 6, 5);
729 /* l |= FLD_VAL(2, 8, 7); */ /* L4FORMAT, 2pix/L4 */
730 l |= FLD_VAL(0, 8, 7); /* L4FORMAT, 1pix/L4 */
731 l |= FLD_VAL(cycleformat, 10, 9);
732 l |= FLD_VAL(0, 12, 11); /* UNUSEDBITS */
733 l |= FLD_VAL(0, 16, 16); /* A0POLARITY */
734 l |= FLD_VAL(0, 17, 17); /* REPOLARITY */
735 l |= FLD_VAL(0, 18, 18); /* WEPOLARITY */
736 l |= FLD_VAL(0, 19, 19); /* CSPOLARITY */
737 l |= FLD_VAL(1, 20, 20); /* TE_VSYNC_POLARITY */
738 l |= FLD_VAL(1, 21, 21); /* HSYNCPOLARITY */
739 rfbi_write_reg(RFBI_CONFIG(rfbi_module), l);
740
741 rfbi_write_reg(RFBI_DATA_CYCLE1(rfbi_module), cycle1);
742 rfbi_write_reg(RFBI_DATA_CYCLE2(rfbi_module), cycle2);
743 rfbi_write_reg(RFBI_DATA_CYCLE3(rfbi_module), cycle3);
744
745
746 l = rfbi_read_reg(RFBI_CONTROL);
747 l = FLD_MOD(l, rfbi_module+1, 3, 2); /* Select CSx */
748 l = FLD_MOD(l, 0, 1, 1); /* clear bypass */
749 rfbi_write_reg(RFBI_CONTROL, l);
750
751
752 DSSDBG("RFBI config: bpp %d, lines %d, cycles: 0x%x 0x%x 0x%x\n",
753 bpp, lines, cycle1, cycle2, cycle3);
754
755 return 0;
756 }
757
758 int omap_rfbi_configure(struct omap_dss_device *dssdev, int pixel_size,
759 int data_lines)
760 {
761 return rfbi_configure(dssdev->phy.rfbi.channel, pixel_size, data_lines);
762 }
763 EXPORT_SYMBOL(omap_rfbi_configure);
764
765 int omap_rfbi_prepare_update(struct omap_dss_device *dssdev,
766 u16 *x, u16 *y, u16 *w, u16 *h)
767 {
768 u16 dw, dh;
769
770 dssdev->driver->get_resolution(dssdev, &dw, &dh);
771
772 if (*x > dw || *y > dh)
773 return -EINVAL;
774
775 if (*x + *w > dw)
776 return -EINVAL;
777
778 if (*y + *h > dh)
779 return -EINVAL;
780
781 if (*w == 1)
782 return -EINVAL;
783
784 if (*w == 0 || *h == 0)
785 return -EINVAL;
786
787 dispc_mgr_set_lcd_size(dssdev->manager->id, *w, *h);
788
789 return 0;
790 }
791 EXPORT_SYMBOL(omap_rfbi_prepare_update);
792
793 int omap_rfbi_update(struct omap_dss_device *dssdev,
794 u16 x, u16 y, u16 w, u16 h,
795 void (*callback)(void *), void *data)
796 {
797 rfbi_transfer_area(dssdev, w, h, callback, data);
798 return 0;
799 }
800 EXPORT_SYMBOL(omap_rfbi_update);
801
802 void rfbi_dump_regs(struct seq_file *s)
803 {
804 #define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, rfbi_read_reg(r))
805
806 if (rfbi_runtime_get())
807 return;
808
809 DUMPREG(RFBI_REVISION);
810 DUMPREG(RFBI_SYSCONFIG);
811 DUMPREG(RFBI_SYSSTATUS);
812 DUMPREG(RFBI_CONTROL);
813 DUMPREG(RFBI_PIXEL_CNT);
814 DUMPREG(RFBI_LINE_NUMBER);
815 DUMPREG(RFBI_CMD);
816 DUMPREG(RFBI_PARAM);
817 DUMPREG(RFBI_DATA);
818 DUMPREG(RFBI_READ);
819 DUMPREG(RFBI_STATUS);
820
821 DUMPREG(RFBI_CONFIG(0));
822 DUMPREG(RFBI_ONOFF_TIME(0));
823 DUMPREG(RFBI_CYCLE_TIME(0));
824 DUMPREG(RFBI_DATA_CYCLE1(0));
825 DUMPREG(RFBI_DATA_CYCLE2(0));
826 DUMPREG(RFBI_DATA_CYCLE3(0));
827
828 DUMPREG(RFBI_CONFIG(1));
829 DUMPREG(RFBI_ONOFF_TIME(1));
830 DUMPREG(RFBI_CYCLE_TIME(1));
831 DUMPREG(RFBI_DATA_CYCLE1(1));
832 DUMPREG(RFBI_DATA_CYCLE2(1));
833 DUMPREG(RFBI_DATA_CYCLE3(1));
834
835 DUMPREG(RFBI_VSYNC_WIDTH);
836 DUMPREG(RFBI_HSYNC_WIDTH);
837
838 rfbi_runtime_put();
839 #undef DUMPREG
840 }
841
842 int omapdss_rfbi_display_enable(struct omap_dss_device *dssdev)
843 {
844 int r;
845
846 if (dssdev->manager == NULL) {
847 DSSERR("failed to enable display: no manager\n");
848 return -ENODEV;
849 }
850
851 r = rfbi_runtime_get();
852 if (r)
853 return r;
854
855 r = omap_dss_start_device(dssdev);
856 if (r) {
857 DSSERR("failed to start device\n");
858 goto err0;
859 }
860
861 r = omap_dispc_register_isr(framedone_callback, NULL,
862 DISPC_IRQ_FRAMEDONE);
863 if (r) {
864 DSSERR("can't get FRAMEDONE irq\n");
865 goto err1;
866 }
867
868 dispc_mgr_set_lcd_display_type(dssdev->manager->id,
869 OMAP_DSS_LCD_DISPLAY_TFT);
870
871 dispc_mgr_set_io_pad_mode(DSS_IO_PAD_MODE_RFBI);
872 dispc_mgr_enable_stallmode(dssdev->manager->id, true);
873
874 dispc_mgr_set_tft_data_lines(dssdev->manager->id, dssdev->ctrl.pixel_size);
875
876 rfbi_configure(dssdev->phy.rfbi.channel,
877 dssdev->ctrl.pixel_size,
878 dssdev->phy.rfbi.data_lines);
879
880 rfbi_set_timings(dssdev->phy.rfbi.channel,
881 &dssdev->ctrl.rfbi_timings);
882
883
884 return 0;
885 err1:
886 omap_dss_stop_device(dssdev);
887 err0:
888 rfbi_runtime_put();
889 return r;
890 }
891 EXPORT_SYMBOL(omapdss_rfbi_display_enable);
892
893 void omapdss_rfbi_display_disable(struct omap_dss_device *dssdev)
894 {
895 omap_dispc_unregister_isr(framedone_callback, NULL,
896 DISPC_IRQ_FRAMEDONE);
897 omap_dss_stop_device(dssdev);
898
899 rfbi_runtime_put();
900 }
901 EXPORT_SYMBOL(omapdss_rfbi_display_disable);
902
903 int rfbi_init_display(struct omap_dss_device *dssdev)
904 {
905 rfbi.dssdev[dssdev->phy.rfbi.channel] = dssdev;
906 dssdev->caps = OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE;
907 return 0;
908 }
909
910 /* RFBI HW IP initialisation */
911 static int omap_rfbihw_probe(struct platform_device *pdev)
912 {
913 u32 rev;
914 struct resource *rfbi_mem;
915 struct clk *clk;
916 int r;
917
918 rfbi.pdev = pdev;
919
920 sema_init(&rfbi.bus_lock, 1);
921
922 rfbi_mem = platform_get_resource(rfbi.pdev, IORESOURCE_MEM, 0);
923 if (!rfbi_mem) {
924 DSSERR("can't get IORESOURCE_MEM RFBI\n");
925 r = -EINVAL;
926 goto err_ioremap;
927 }
928 rfbi.base = ioremap(rfbi_mem->start, resource_size(rfbi_mem));
929 if (!rfbi.base) {
930 DSSERR("can't ioremap RFBI\n");
931 r = -ENOMEM;
932 goto err_ioremap;
933 }
934
935 pm_runtime_enable(&pdev->dev);
936
937 r = rfbi_runtime_get();
938 if (r)
939 goto err_get_rfbi;
940
941 msleep(10);
942
943 clk = clk_get(&pdev->dev, "ick");
944 if (IS_ERR(clk)) {
945 DSSERR("can't get ick\n");
946 r = PTR_ERR(clk);
947 goto err_get_ick;
948 }
949
950 rfbi.l4_khz = clk_get_rate(clk) / 1000;
951
952 clk_put(clk);
953
954 rev = rfbi_read_reg(RFBI_REVISION);
955 dev_dbg(&pdev->dev, "OMAP RFBI rev %d.%d\n",
956 FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
957
958 rfbi_runtime_put();
959
960 return 0;
961
962 err_get_ick:
963 rfbi_runtime_put();
964 err_get_rfbi:
965 pm_runtime_disable(&pdev->dev);
966 iounmap(rfbi.base);
967 err_ioremap:
968 return r;
969 }
970
971 static int omap_rfbihw_remove(struct platform_device *pdev)
972 {
973 pm_runtime_disable(&pdev->dev);
974 iounmap(rfbi.base);
975 return 0;
976 }
977
978 static int rfbi_runtime_suspend(struct device *dev)
979 {
980 dispc_runtime_put();
981 dss_runtime_put();
982
983 return 0;
984 }
985
986 static int rfbi_runtime_resume(struct device *dev)
987 {
988 int r;
989
990 r = dss_runtime_get();
991 if (r < 0)
992 goto err_get_dss;
993
994 r = dispc_runtime_get();
995 if (r < 0)
996 goto err_get_dispc;
997
998 return 0;
999
1000 err_get_dispc:
1001 dss_runtime_put();
1002 err_get_dss:
1003 return r;
1004 }
1005
1006 static const struct dev_pm_ops rfbi_pm_ops = {
1007 .runtime_suspend = rfbi_runtime_suspend,
1008 .runtime_resume = rfbi_runtime_resume,
1009 };
1010
1011 static struct platform_driver omap_rfbihw_driver = {
1012 .probe = omap_rfbihw_probe,
1013 .remove = omap_rfbihw_remove,
1014 .driver = {
1015 .name = "omapdss_rfbi",
1016 .owner = THIS_MODULE,
1017 .pm = &rfbi_pm_ops,
1018 },
1019 };
1020
1021 int rfbi_init_platform_driver(void)
1022 {
1023 return platform_driver_register(&omap_rfbihw_driver);
1024 }
1025
1026 void rfbi_uninit_platform_driver(void)
1027 {
1028 return platform_driver_unregister(&omap_rfbihw_driver);
1029 }