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Merge branch 'tracing/core' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic...
[linux-2.6-block.git] / drivers / video / omap2 / dss / rfbi.c
CommitLineData
5c18adb3
TV		 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/vmalloc.h>
28#include <linux/clk.h>
29#include <linux/io.h>
30#include <linux/delay.h>
31#include <linux/kfifo.h>
32#include <linux/ktime.h>
33#include <linux/hrtimer.h>
34#include <linux/seq_file.h>
35
36#include <plat/display.h>
37#include "dss.h"
38
39/*#define MEASURE_PERF*/
40
41#define RFBI_BASE 0x48050800
42
43struct 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 RFBI_CMD_FIFO_LEN_BYTES (16 * sizeof(struct update_param))
70
71#define REG_FLD_MOD(idx, val, start, end) \
72 rfbi_write_reg(idx, FLD_MOD(rfbi_read_reg(idx), val, start, end))
73
74/* To work around an RFBI transfer rate limitation */
75#define OMAP_RFBI_RATE_LIMIT 1
76
77enum omap_rfbi_cycleformat {
78 OMAP_DSS_RFBI_CYCLEFORMAT_1_1 = 0,
79 OMAP_DSS_RFBI_CYCLEFORMAT_2_1 = 1,
80 OMAP_DSS_RFBI_CYCLEFORMAT_3_1 = 2,
81 OMAP_DSS_RFBI_CYCLEFORMAT_3_2 = 3,
82};
83
84enum omap_rfbi_datatype {
85 OMAP_DSS_RFBI_DATATYPE_12 = 0,
86 OMAP_DSS_RFBI_DATATYPE_16 = 1,
87 OMAP_DSS_RFBI_DATATYPE_18 = 2,
88 OMAP_DSS_RFBI_DATATYPE_24 = 3,
89};
90
91enum omap_rfbi_parallelmode {
92 OMAP_DSS_RFBI_PARALLELMODE_8 = 0,
93 OMAP_DSS_RFBI_PARALLELMODE_9 = 1,
94 OMAP_DSS_RFBI_PARALLELMODE_12 = 2,
95 OMAP_DSS_RFBI_PARALLELMODE_16 = 3,
96};
97
98enum update_cmd {
99 RFBI_CMD_UPDATE = 0,
100 RFBI_CMD_SYNC = 1,
101};
102
103static int rfbi_convert_timings(struct rfbi_timings *t);
104static void rfbi_get_clk_info(u32 *clk_period, u32 *max_clk_div);
105static void process_cmd_fifo(void);
106
107static struct {
108 void __iomem *base;
109
110 unsigned long l4_khz;
111
112 enum omap_rfbi_datatype datatype;
113 enum omap_rfbi_parallelmode parallelmode;
114
115 enum omap_rfbi_te_mode te_mode;
116 int te_enabled;
117
118 void (*framedone_callback)(void *data);
119 void *framedone_callback_data;
120
121 struct omap_dss_device *dssdev[2];
122
fc248a49 123 struct kfifo cmd_fifo;
5c18adb3
TV		 124 spinlock_t cmd_lock;
125 struct completion cmd_done;
126 atomic_t cmd_fifo_full;
127 atomic_t cmd_pending;
128#ifdef MEASURE_PERF
129 unsigned perf_bytes;
130 ktime_t perf_setup_time;
131 ktime_t perf_start_time;
132#endif
133} rfbi;
134
135struct update_region {
136 u16 x;
137 u16 y;
138 u16 w;
139 u16 h;
140};
141
142struct update_param {
143 u8 rfbi_module;
144 u8 cmd;
145
146 union {
147 struct update_region r;
148 struct completion *sync;
149 } par;
150};
151
152static inline void rfbi_write_reg(const struct rfbi_reg idx, u32 val)
153{
154 __raw_writel(val, rfbi.base + idx.idx);
155}
156
157static inline u32 rfbi_read_reg(const struct rfbi_reg idx)
158{
159 return __raw_readl(rfbi.base + idx.idx);
160}
161
162static void rfbi_enable_clocks(bool enable)
163{
164 if (enable)
165 dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1);
166 else
167 dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);
168}
169
170void omap_rfbi_write_command(const void *buf, u32 len)
171{
172 rfbi_enable_clocks(1);
173 switch (rfbi.parallelmode) {
174 case OMAP_DSS_RFBI_PARALLELMODE_8:
175 {
176 const u8 *b = buf;
177 for (; len; len--)
178 rfbi_write_reg(RFBI_CMD, *b++);
179 break;
180 }
181
182 case OMAP_DSS_RFBI_PARALLELMODE_16:
183 {
184 const u16 *w = buf;
185 BUG_ON(len & 1);
186 for (; len; len -= 2)
187 rfbi_write_reg(RFBI_CMD, *w++);
188 break;
189 }
190
191 case OMAP_DSS_RFBI_PARALLELMODE_9:
192 case OMAP_DSS_RFBI_PARALLELMODE_12:
193 default:
194 BUG();
195 }
196 rfbi_enable_clocks(0);
197}
198EXPORT_SYMBOL(omap_rfbi_write_command);
199
200void omap_rfbi_read_data(void *buf, u32 len)
201{
202 rfbi_enable_clocks(1);
203 switch (rfbi.parallelmode) {
204 case OMAP_DSS_RFBI_PARALLELMODE_8:
205 {
206 u8 *b = buf;
207 for (; len; len--) {
208 rfbi_write_reg(RFBI_READ, 0);
209 *b++ = rfbi_read_reg(RFBI_READ);
210 }
211 break;
212 }
213
214 case OMAP_DSS_RFBI_PARALLELMODE_16:
215 {
216 u16 *w = buf;
217 BUG_ON(len & ~1);
218 for (; len; len -= 2) {
219 rfbi_write_reg(RFBI_READ, 0);
220 *w++ = rfbi_read_reg(RFBI_READ);
221 }
222 break;
223 }
224
225 case OMAP_DSS_RFBI_PARALLELMODE_9:
226 case OMAP_DSS_RFBI_PARALLELMODE_12:
227 default:
228 BUG();
229 }
230 rfbi_enable_clocks(0);
231}
232EXPORT_SYMBOL(omap_rfbi_read_data);
233
234void omap_rfbi_write_data(const void *buf, u32 len)
235{
236 rfbi_enable_clocks(1);
237 switch (rfbi.parallelmode) {
238 case OMAP_DSS_RFBI_PARALLELMODE_8:
239 {
240 const u8 *b = buf;
241 for (; len; len--)
242 rfbi_write_reg(RFBI_PARAM, *b++);
243 break;
244 }
245
246 case OMAP_DSS_RFBI_PARALLELMODE_16:
247 {
248 const u16 *w = buf;
249 BUG_ON(len & 1);
250 for (; len; len -= 2)
251 rfbi_write_reg(RFBI_PARAM, *w++);
252 break;
253 }
254
255 case OMAP_DSS_RFBI_PARALLELMODE_9:
256 case OMAP_DSS_RFBI_PARALLELMODE_12:
257 default:
258 BUG();
259
260 }
261 rfbi_enable_clocks(0);
262}
263EXPORT_SYMBOL(omap_rfbi_write_data);
264
265void omap_rfbi_write_pixels(const void __iomem *buf, int scr_width,
266 u16 x, u16 y,
267 u16 w, u16 h)
268{
269 int start_offset = scr_width * y + x;
270 int horiz_offset = scr_width - w;
271 int i;
272
273 rfbi_enable_clocks(1);
274
275 if (rfbi.datatype == OMAP_DSS_RFBI_DATATYPE_16 &&
276 rfbi.parallelmode == OMAP_DSS_RFBI_PARALLELMODE_8) {
277 const u16 __iomem *pd = buf;
278 pd += start_offset;
279
280 for (; h; --h) {
281 for (i = 0; i < w; ++i) {
282 const u8 __iomem *b = (const u8 __iomem *)pd;
283 rfbi_write_reg(RFBI_PARAM, __raw_readb(b+1));
284 rfbi_write_reg(RFBI_PARAM, __raw_readb(b+0));
285 ++pd;
286 }
287 pd += horiz_offset;
288 }
289 } else if (rfbi.datatype == OMAP_DSS_RFBI_DATATYPE_24 &&
290 rfbi.parallelmode == OMAP_DSS_RFBI_PARALLELMODE_8) {
291 const u32 __iomem *pd = buf;
292 pd += start_offset;
293
294 for (; h; --h) {
295 for (i = 0; i < w; ++i) {
296 const u8 __iomem *b = (const u8 __iomem *)pd;
297 rfbi_write_reg(RFBI_PARAM, __raw_readb(b+2));
298 rfbi_write_reg(RFBI_PARAM, __raw_readb(b+1));
299 rfbi_write_reg(RFBI_PARAM, __raw_readb(b+0));
300 ++pd;
301 }
302 pd += horiz_offset;
303 }
304 } else if (rfbi.datatype == OMAP_DSS_RFBI_DATATYPE_16 &&
305 rfbi.parallelmode == OMAP_DSS_RFBI_PARALLELMODE_16) {
306 const u16 __iomem *pd = buf;
307 pd += start_offset;
308
309 for (; h; --h) {
310 for (i = 0; i < w; ++i) {
311 rfbi_write_reg(RFBI_PARAM, __raw_readw(pd));
312 ++pd;
313 }
314 pd += horiz_offset;
315 }
316 } else {
317 BUG();
318 }
319
320 rfbi_enable_clocks(0);
321}
322EXPORT_SYMBOL(omap_rfbi_write_pixels);
323
324#ifdef MEASURE_PERF
325static void perf_mark_setup(void)
326{
327 rfbi.perf_setup_time = ktime_get();
328}
329
330static void perf_mark_start(void)
331{
332 rfbi.perf_start_time = ktime_get();
333}
334
335static void perf_show(const char *name)
336{
337 ktime_t t, setup_time, trans_time;
338 u32 total_bytes;
339 u32 setup_us, trans_us, total_us;
340
341 t = ktime_get();
342
343 setup_time = ktime_sub(rfbi.perf_start_time, rfbi.perf_setup_time);
344 setup_us = (u32)ktime_to_us(setup_time);
345 if (setup_us == 0)
346 setup_us = 1;
347
348 trans_time = ktime_sub(t, rfbi.perf_start_time);
349 trans_us = (u32)ktime_to_us(trans_time);
350 if (trans_us == 0)
351 trans_us = 1;
352
353 total_us = setup_us + trans_us;
354
355 total_bytes = rfbi.perf_bytes;
356
357 DSSINFO("%s update %u us + %u us = %u us (%uHz), %u bytes, "
358 "%u kbytes/sec\n",
359 name,
360 setup_us,
361 trans_us,
362 total_us,
363 1000*1000 / total_us,
364 total_bytes,
365 total_bytes * 1000 / total_us);
366}
367#else
368#define perf_mark_setup()
369#define perf_mark_start()
370#define perf_show(x)
371#endif
372
373void rfbi_transfer_area(u16 width, u16 height,
374 void (callback)(void *data), void *data)
375{
376 u32 l;
377
378 /*BUG_ON(callback == 0);*/
379 BUG_ON(rfbi.framedone_callback != NULL);
380
381 DSSDBG("rfbi_transfer_area %dx%d\n", width, height);
382
383 dispc_set_lcd_size(width, height);
384
385 dispc_enable_lcd_out(1);
386
387 rfbi.framedone_callback = callback;
388 rfbi.framedone_callback_data = data;
389
390 rfbi_enable_clocks(1);
391
392 rfbi_write_reg(RFBI_PIXEL_CNT, width * height);
393
394 l = rfbi_read_reg(RFBI_CONTROL);
395 l = FLD_MOD(l, 1, 0, 0); /* enable */
396 if (!rfbi.te_enabled)
397 l = FLD_MOD(l, 1, 4, 4); /* ITE */
398
399 perf_mark_start();
400
401 rfbi_write_reg(RFBI_CONTROL, l);
402}
403
404static void framedone_callback(void *data, u32 mask)
405{
406 void (*callback)(void *data);
407
408 DSSDBG("FRAMEDONE\n");
409
410 perf_show("DISPC");
411
412 REG_FLD_MOD(RFBI_CONTROL, 0, 0, 0);
413
414 rfbi_enable_clocks(0);
415
416 callback = rfbi.framedone_callback;
417 rfbi.framedone_callback = NULL;
418
419 /*callback(rfbi.framedone_callback_data);*/
420
421 atomic_set(&rfbi.cmd_pending, 0);
422
423 process_cmd_fifo();
424}
425
426#if 1 /* VERBOSE */
427static void rfbi_print_timings(void)
428{
429 u32 l;
430 u32 time;
431
432 l = rfbi_read_reg(RFBI_CONFIG(0));
433 time = 1000000000 / rfbi.l4_khz;
434 if (l & (1 << 4))
435 time *= 2;
436
437 DSSDBG("Tick time %u ps\n", time);
438 l = rfbi_read_reg(RFBI_ONOFF_TIME(0));
439 DSSDBG("CSONTIME %d, CSOFFTIME %d, WEONTIME %d, WEOFFTIME %d, "
440 "REONTIME %d, REOFFTIME %d\n",
441 l & 0x0f, (l >> 4) & 0x3f, (l >> 10) & 0x0f, (l >> 14) & 0x3f,
442 (l >> 20) & 0x0f, (l >> 24) & 0x3f);
443
444 l = rfbi_read_reg(RFBI_CYCLE_TIME(0));
445 DSSDBG("WECYCLETIME %d, RECYCLETIME %d, CSPULSEWIDTH %d, "
446 "ACCESSTIME %d\n",
447 (l & 0x3f), (l >> 6) & 0x3f, (l >> 12) & 0x3f,
448 (l >> 22) & 0x3f);
449}
450#else
451static void rfbi_print_timings(void) {}
452#endif
453
454
455
456
457static u32 extif_clk_period;
458
459static inline unsigned long round_to_extif_ticks(unsigned long ps, int div)
460{
461 int bus_tick = extif_clk_period * div;
462 return (ps + bus_tick - 1) / bus_tick * bus_tick;
463}
464
465static int calc_reg_timing(struct rfbi_timings *t, int div)
466{
467 t->clk_div = div;
468
469 t->cs_on_time = round_to_extif_ticks(t->cs_on_time, div);
470
471 t->we_on_time = round_to_extif_ticks(t->we_on_time, div);
472 t->we_off_time = round_to_extif_ticks(t->we_off_time, div);
473 t->we_cycle_time = round_to_extif_ticks(t->we_cycle_time, div);
474
475 t->re_on_time = round_to_extif_ticks(t->re_on_time, div);
476 t->re_off_time = round_to_extif_ticks(t->re_off_time, div);
477 t->re_cycle_time = round_to_extif_ticks(t->re_cycle_time, div);
478
479 t->access_time = round_to_extif_ticks(t->access_time, div);
480 t->cs_off_time = round_to_extif_ticks(t->cs_off_time, div);
481 t->cs_pulse_width = round_to_extif_ticks(t->cs_pulse_width, div);
482
483 DSSDBG("[reg]cson %d csoff %d reon %d reoff %d\n",
484 t->cs_on_time, t->cs_off_time, t->re_on_time, t->re_off_time);
485 DSSDBG("[reg]weon %d weoff %d recyc %d wecyc %d\n",
486 t->we_on_time, t->we_off_time, t->re_cycle_time,
487 t->we_cycle_time);
488 DSSDBG("[reg]rdaccess %d cspulse %d\n",
489 t->access_time, t->cs_pulse_width);
490
491 return rfbi_convert_timings(t);
492}
493
494static int calc_extif_timings(struct rfbi_timings *t)
495{
496 u32 max_clk_div;
497 int div;
498
499 rfbi_get_clk_info(&extif_clk_period, &max_clk_div);
500 for (div = 1; div <= max_clk_div; div++) {
501 if (calc_reg_timing(t, div) == 0)
502 break;
503 }
504
505 if (div <= max_clk_div)
506 return 0;
507
508 DSSERR("can't setup timings\n");
509 return -1;
510}
511
512
513void rfbi_set_timings(int rfbi_module, struct rfbi_timings *t)
514{
515 int r;
516
517 if (!t->converted) {
518 r = calc_extif_timings(t);
519 if (r < 0)
520 DSSERR("Failed to calc timings\n");
521 }
522
523 BUG_ON(!t->converted);
524
525 rfbi_enable_clocks(1);
526 rfbi_write_reg(RFBI_ONOFF_TIME(rfbi_module), t->tim[0]);
527 rfbi_write_reg(RFBI_CYCLE_TIME(rfbi_module), t->tim[1]);
528
529 /* TIMEGRANULARITY */
530 REG_FLD_MOD(RFBI_CONFIG(rfbi_module),
531 (t->tim[2] ? 1 : 0), 4, 4);
532
533 rfbi_print_timings();
534 rfbi_enable_clocks(0);
535}
536
537static int ps_to_rfbi_ticks(int time, int div)
538{
539 unsigned long tick_ps;
540 int ret;
541
542 /* Calculate in picosecs to yield more exact results */
543 tick_ps = 1000000000 / (rfbi.l4_khz) * div;
544
545 ret = (time + tick_ps - 1) / tick_ps;
546
547 return ret;
548}
549
550#ifdef OMAP_RFBI_RATE_LIMIT
551unsigned long rfbi_get_max_tx_rate(void)
552{
553 unsigned long l4_rate, dss1_rate;
554 int min_l4_ticks = 0;
555 int i;
556
557 /* According to TI this can't be calculated so make the
558 * adjustments for a couple of known frequencies and warn for
559 * others.
560 */
561 static const struct {
562 unsigned long l4_clk; /* HZ */
563 unsigned long dss1_clk; /* HZ */
564 unsigned long min_l4_ticks;
565 } ftab[] = {
566 { 55, 132, 7, }, /* 7.86 MPix/s */
567 { 110, 110, 12, }, /* 9.16 MPix/s */
568 { 110, 132, 10, }, /* 11 Mpix/s */
569 { 120, 120, 10, }, /* 12 Mpix/s */
570 { 133, 133, 10, }, /* 13.3 Mpix/s */
571 };
572
573 l4_rate = rfbi.l4_khz / 1000;
574 dss1_rate = dss_clk_get_rate(DSS_CLK_FCK1) / 1000000;
575
576 for (i = 0; i < ARRAY_SIZE(ftab); i++) {
577 /* Use a window instead of an exact match, to account
578 * for different DPLL multiplier / divider pairs.
579 */
580 if (abs(ftab[i].l4_clk - l4_rate) < 3 &&
581 abs(ftab[i].dss1_clk - dss1_rate) < 3) {
582 min_l4_ticks = ftab[i].min_l4_ticks;
583 break;
584 }
585 }
586 if (i == ARRAY_SIZE(ftab)) {
587 /* Can't be sure, return anyway the maximum not
588 * rate-limited. This might cause a problem only for the
589 * tearing synchronisation.
590 */
591 DSSERR("can't determine maximum RFBI transfer rate\n");
592 return rfbi.l4_khz * 1000;
593 }
594 return rfbi.l4_khz * 1000 / min_l4_ticks;
595}
596#else
597int rfbi_get_max_tx_rate(void)
598{
599 return rfbi.l4_khz * 1000;
600}
601#endif
602
603static void rfbi_get_clk_info(u32 *clk_period, u32 *max_clk_div)
604{
605 *clk_period = 1000000000 / rfbi.l4_khz;
606 *max_clk_div = 2;
607}
608
609static int rfbi_convert_timings(struct rfbi_timings *t)
610{
611 u32 l;
612 int reon, reoff, weon, weoff, cson, csoff, cs_pulse;
613 int actim, recyc, wecyc;
614 int div = t->clk_div;
615
616 if (div <= 0 || div > 2)
617 return -1;
618
619 /* Make sure that after conversion it still holds that:
620 * weoff > weon, reoff > reon, recyc >= reoff, wecyc >= weoff,
621 * csoff > cson, csoff >= max(weoff, reoff), actim > reon
622 */
623 weon = ps_to_rfbi_ticks(t->we_on_time, div);
624 weoff = ps_to_rfbi_ticks(t->we_off_time, div);
625 if (weoff <= weon)
626 weoff = weon + 1;
627 if (weon > 0x0f)
628 return -1;
629 if (weoff > 0x3f)
630 return -1;
631
632 reon = ps_to_rfbi_ticks(t->re_on_time, div);
633 reoff = ps_to_rfbi_ticks(t->re_off_time, div);
634 if (reoff <= reon)
635 reoff = reon + 1;
636 if (reon > 0x0f)
637 return -1;
638 if (reoff > 0x3f)
639 return -1;
640
641 cson = ps_to_rfbi_ticks(t->cs_on_time, div);
642 csoff = ps_to_rfbi_ticks(t->cs_off_time, div);
643 if (csoff <= cson)
644 csoff = cson + 1;
645 if (csoff < max(weoff, reoff))
646 csoff = max(weoff, reoff);
647 if (cson > 0x0f)
648 return -1;
649 if (csoff > 0x3f)
650 return -1;
651
652 l = cson;
653 l |= csoff << 4;
654 l |= weon << 10;
655 l |= weoff << 14;
656 l |= reon << 20;
657 l |= reoff << 24;
658
659 t->tim[0] = l;
660
661 actim = ps_to_rfbi_ticks(t->access_time, div);
662 if (actim <= reon)
663 actim = reon + 1;
664 if (actim > 0x3f)
665 return -1;
666
667 wecyc = ps_to_rfbi_ticks(t->we_cycle_time, div);
668 if (wecyc < weoff)
669 wecyc = weoff;
670 if (wecyc > 0x3f)
671 return -1;
672
673 recyc = ps_to_rfbi_ticks(t->re_cycle_time, div);
674 if (recyc < reoff)
675 recyc = reoff;
676 if (recyc > 0x3f)
677 return -1;
678
679 cs_pulse = ps_to_rfbi_ticks(t->cs_pulse_width, div);
680 if (cs_pulse > 0x3f)
681 return -1;
682
683 l = wecyc;
684 l |= recyc << 6;
685 l |= cs_pulse << 12;
686 l |= actim << 22;
687
688 t->tim[1] = l;
689
690 t->tim[2] = div - 1;
691
692 t->converted = 1;
693
694 return 0;
695}
696
697/* xxx FIX module selection missing */
698int omap_rfbi_setup_te(enum omap_rfbi_te_mode mode,
699 unsigned hs_pulse_time, unsigned vs_pulse_time,
700 int hs_pol_inv, int vs_pol_inv, int extif_div)
701{
702 int hs, vs;
703 int min;
704 u32 l;
705
706 hs = ps_to_rfbi_ticks(hs_pulse_time, 1);
707 vs = ps_to_rfbi_ticks(vs_pulse_time, 1);
708 if (hs < 2)
709 return -EDOM;
710 if (mode == OMAP_DSS_RFBI_TE_MODE_2)
711 min = 2;
712 else /* OMAP_DSS_RFBI_TE_MODE_1 */
713 min = 4;
714 if (vs < min)
715 return -EDOM;
716 if (vs == hs)
717 return -EINVAL;
718 rfbi.te_mode = mode;
719 DSSDBG("setup_te: mode %d hs %d vs %d hs_inv %d vs_inv %d\n",
720 mode, hs, vs, hs_pol_inv, vs_pol_inv);
721
722 rfbi_enable_clocks(1);
723 rfbi_write_reg(RFBI_HSYNC_WIDTH, hs);
724 rfbi_write_reg(RFBI_VSYNC_WIDTH, vs);
725
726 l = rfbi_read_reg(RFBI_CONFIG(0));
727 if (hs_pol_inv)
728 l &= ~(1 << 21);
729 else
730 l |= 1 << 21;
731 if (vs_pol_inv)
732 l &= ~(1 << 20);
733 else
734 l |= 1 << 20;
735 rfbi_enable_clocks(0);
736
737 return 0;
738}
739EXPORT_SYMBOL(omap_rfbi_setup_te);
740
741/* xxx FIX module selection missing */
742int omap_rfbi_enable_te(bool enable, unsigned line)
743{
744 u32 l;
745
746 DSSDBG("te %d line %d mode %d\n", enable, line, rfbi.te_mode);
747 if (line > (1 << 11) - 1)
748 return -EINVAL;
749
750 rfbi_enable_clocks(1);
751 l = rfbi_read_reg(RFBI_CONFIG(0));
752 l &= ~(0x3 << 2);
753 if (enable) {
754 rfbi.te_enabled = 1;
755 l |= rfbi.te_mode << 2;
756 } else
757 rfbi.te_enabled = 0;
758 rfbi_write_reg(RFBI_CONFIG(0), l);
759 rfbi_write_reg(RFBI_LINE_NUMBER, line);
760 rfbi_enable_clocks(0);
761
762 return 0;
763}
764EXPORT_SYMBOL(omap_rfbi_enable_te);
765
766#if 0
767static void rfbi_enable_config(int enable1, int enable2)
768{
769 u32 l;
770 int cs = 0;
771
772 if (enable1)
773 cs |= 1<<0;
774 if (enable2)
775 cs |= 1<<1;
776
777 rfbi_enable_clocks(1);
778
779 l = rfbi_read_reg(RFBI_CONTROL);
780
781 l = FLD_MOD(l, cs, 3, 2);
782 l = FLD_MOD(l, 0, 1, 1);
783
784 rfbi_write_reg(RFBI_CONTROL, l);
785
786
787 l = rfbi_read_reg(RFBI_CONFIG(0));
788 l = FLD_MOD(l, 0, 3, 2); /* TRIGGERMODE: ITE */
789 /*l |= FLD_VAL(2, 8, 7); */ /* L4FORMAT, 2pix/L4 */
790 /*l |= FLD_VAL(0, 8, 7); */ /* L4FORMAT, 1pix/L4 */
791
792 l = FLD_MOD(l, 0, 16, 16); /* A0POLARITY */
793 l = FLD_MOD(l, 1, 20, 20); /* TE_VSYNC_POLARITY */
794 l = FLD_MOD(l, 1, 21, 21); /* HSYNCPOLARITY */
795
796 l = FLD_MOD(l, OMAP_DSS_RFBI_PARALLELMODE_8, 1, 0);
797 rfbi_write_reg(RFBI_CONFIG(0), l);
798
799 rfbi_enable_clocks(0);
800}
801#endif
802
803int rfbi_configure(int rfbi_module, int bpp, int lines)
804{
805 u32 l;
806 int cycle1 = 0, cycle2 = 0, cycle3 = 0;
807 enum omap_rfbi_cycleformat cycleformat;
808 enum omap_rfbi_datatype datatype;
809 enum omap_rfbi_parallelmode parallelmode;
810
811 switch (bpp) {
812 case 12:
813 datatype = OMAP_DSS_RFBI_DATATYPE_12;
814 break;
815 case 16:
816 datatype = OMAP_DSS_RFBI_DATATYPE_16;
817 break;
818 case 18:
819 datatype = OMAP_DSS_RFBI_DATATYPE_18;
820 break;
821 case 24:
822 datatype = OMAP_DSS_RFBI_DATATYPE_24;
823 break;
824 default:
825 BUG();
826 return 1;
827 }
828 rfbi.datatype = datatype;
829
830 switch (lines) {
831 case 8:
832 parallelmode = OMAP_DSS_RFBI_PARALLELMODE_8;
833 break;
834 case 9:
835 parallelmode = OMAP_DSS_RFBI_PARALLELMODE_9;
836 break;
837 case 12:
838 parallelmode = OMAP_DSS_RFBI_PARALLELMODE_12;
839 break;
840 case 16:
841 parallelmode = OMAP_DSS_RFBI_PARALLELMODE_16;
842 break;
843 default:
844 BUG();
845 return 1;
846 }
847 rfbi.parallelmode = parallelmode;
848
849 if ((bpp % lines) == 0) {
850 switch (bpp / lines) {
851 case 1:
852 cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_1_1;
853 break;
854 case 2:
855 cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_2_1;
856 break;
857 case 3:
858 cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_3_1;
859 break;
860 default:
861 BUG();
862 return 1;
863 }
864 } else if ((2 * bpp % lines) == 0) {
865 if ((2 * bpp / lines) == 3)
866 cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_3_2;
867 else {
868 BUG();
869 return 1;
870 }
871 } else {
872 BUG();
873 return 1;
874 }
875
876 switch (cycleformat) {
877 case OMAP_DSS_RFBI_CYCLEFORMAT_1_1:
878 cycle1 = lines;
879 break;
880
881 case OMAP_DSS_RFBI_CYCLEFORMAT_2_1:
882 cycle1 = lines;
883 cycle2 = lines;
884 break;
885
886 case OMAP_DSS_RFBI_CYCLEFORMAT_3_1:
887 cycle1 = lines;
888 cycle2 = lines;
889 cycle3 = lines;
890 break;
891
892 case OMAP_DSS_RFBI_CYCLEFORMAT_3_2:
893 cycle1 = lines;
894 cycle2 = (lines / 2) | ((lines / 2) << 16);
895 cycle3 = (lines << 16);
896 break;
897 }
898
899 rfbi_enable_clocks(1);
900
901 REG_FLD_MOD(RFBI_CONTROL, 0, 3, 2); /* clear CS */
902
903 l = 0;
904 l |= FLD_VAL(parallelmode, 1, 0);
905 l |= FLD_VAL(0, 3, 2); /* TRIGGERMODE: ITE */
906 l |= FLD_VAL(0, 4, 4); /* TIMEGRANULARITY */
907 l |= FLD_VAL(datatype, 6, 5);
908 /* l |= FLD_VAL(2, 8, 7); */ /* L4FORMAT, 2pix/L4 */
909 l |= FLD_VAL(0, 8, 7); /* L4FORMAT, 1pix/L4 */
910 l |= FLD_VAL(cycleformat, 10, 9);
911 l |= FLD_VAL(0, 12, 11); /* UNUSEDBITS */
912 l |= FLD_VAL(0, 16, 16); /* A0POLARITY */
913 l |= FLD_VAL(0, 17, 17); /* REPOLARITY */
914 l |= FLD_VAL(0, 18, 18); /* WEPOLARITY */
915 l |= FLD_VAL(0, 19, 19); /* CSPOLARITY */
916 l |= FLD_VAL(1, 20, 20); /* TE_VSYNC_POLARITY */
917 l |= FLD_VAL(1, 21, 21); /* HSYNCPOLARITY */
918 rfbi_write_reg(RFBI_CONFIG(rfbi_module), l);
919
920 rfbi_write_reg(RFBI_DATA_CYCLE1(rfbi_module), cycle1);
921 rfbi_write_reg(RFBI_DATA_CYCLE2(rfbi_module), cycle2);
922 rfbi_write_reg(RFBI_DATA_CYCLE3(rfbi_module), cycle3);
923
924
925 l = rfbi_read_reg(RFBI_CONTROL);
926 l = FLD_MOD(l, rfbi_module+1, 3, 2); /* Select CSx */
927 l = FLD_MOD(l, 0, 1, 1); /* clear bypass */
928 rfbi_write_reg(RFBI_CONTROL, l);
929
930
931 DSSDBG("RFBI config: bpp %d, lines %d, cycles: 0x%x 0x%x 0x%x\n",
932 bpp, lines, cycle1, cycle2, cycle3);
933
934 rfbi_enable_clocks(0);
935
936 return 0;
937}
938EXPORT_SYMBOL(rfbi_configure);
939
940static int rfbi_find_display(struct omap_dss_device *dssdev)
941{
942 if (dssdev == rfbi.dssdev[0])
943 return 0;
944
945 if (dssdev == rfbi.dssdev[1])
946 return 1;
947
948 BUG();
949 return -1;
950}
951
952
953static void signal_fifo_waiters(void)
954{
955 if (atomic_read(&rfbi.cmd_fifo_full) > 0) {
956 /* DSSDBG("SIGNALING: Fifo not full for waiter!\n"); */
957 complete(&rfbi.cmd_done);
958 atomic_dec(&rfbi.cmd_fifo_full);
959 }
960}
961
962/* returns 1 for async op, and 0 for sync op */
963static int do_update(struct omap_dss_device *dssdev, struct update_region *upd)
964{
965 u16 x = upd->x;
966 u16 y = upd->y;
967 u16 w = upd->w;
968 u16 h = upd->h;
969
970 perf_mark_setup();
971
972 if (dssdev->manager->caps & OMAP_DSS_OVL_MGR_CAP_DISPC) {
973 /*dssdev->driver->enable_te(dssdev, 1); */
974 dss_setup_partial_planes(dssdev, &x, &y, &w, &h);
975 }
976
977#ifdef MEASURE_PERF
978 rfbi.perf_bytes = w * h * 2; /* XXX always 16bit */
979#endif
980
981 dssdev->driver->setup_update(dssdev, x, y, w, h);
982
983 if (dssdev->manager->caps & OMAP_DSS_OVL_MGR_CAP_DISPC) {
984 rfbi_transfer_area(w, h, NULL, NULL);
985 return 1;
986 } else {
987 struct omap_overlay *ovl;
988 void __iomem *addr;
989 int scr_width;
990
991 ovl = dssdev->manager->overlays[0];
992 scr_width = ovl->info.screen_width;
993 addr = ovl->info.vaddr;
994
995 omap_rfbi_write_pixels(addr, scr_width, x, y, w, h);
996
997 perf_show("L4");
998
999 return 0;
1000 }
1001}
1002
1003static void process_cmd_fifo(void)
1004{
1005 int len;
1006 struct update_param p;
1007 struct omap_dss_device *dssdev;
1008 unsigned long flags;
1009
1010 if (atomic_inc_return(&rfbi.cmd_pending) != 1)
1011 return;
1012
1013 while (true) {
fc248a49 1014 spin_lock_irqsave(&rfbi.cmd_lock, flags);
5c18adb3 1015
fc248a49 1016 len = kfifo_out(&rfbi.cmd_fifo, (unsigned char *)&p,
5c18adb3
TV		 1017 sizeof(struct update_param));
1018 if (len == 0) {
1019 DSSDBG("nothing more in fifo\n");
1020 atomic_set(&rfbi.cmd_pending, 0);
fc248a49 1021 spin_unlock_irqrestore(&rfbi.cmd_lock, flags);
5c18adb3
TV		 1022 break;
1023 }
1024
1025 /* DSSDBG("fifo full %d\n", rfbi.cmd_fifo_full.counter);*/
1026
fc248a49 1027 spin_unlock_irqrestore(&rfbi.cmd_lock, flags);
5c18adb3
TV		 1028
1029 BUG_ON(len != sizeof(struct update_param));
1030 BUG_ON(p.rfbi_module > 1);
1031
1032 dssdev = rfbi.dssdev[p.rfbi_module];
1033
1034 if (p.cmd == RFBI_CMD_UPDATE) {
1035 if (do_update(dssdev, &p.par.r))
1036 break; /* async op */
1037 } else if (p.cmd == RFBI_CMD_SYNC) {
1038 DSSDBG("Signaling SYNC done!\n");
1039 complete(p.par.sync);
1040 } else
1041 BUG();
1042 }
1043
1044 signal_fifo_waiters();
1045}
1046
1047static void rfbi_push_cmd(struct update_param *p)
1048{
1049 int ret;
1050
1051 while (1) {
1052 unsigned long flags;
1053 int available;
1054
fc248a49 1055 spin_lock_irqsave(&rfbi.cmd_lock, flags);
5c18adb3 1056 available = RFBI_CMD_FIFO_LEN_BYTES -
fc248a49 1057 kfifo_len(&rfbi.cmd_fifo);
5c18adb3
TV		 1058
1059/* DSSDBG("%d bytes left in fifo\n", available); */
1060 if (available < sizeof(struct update_param)) {
1061 DSSDBG("Going to wait because FIFO FULL..\n");
fc248a49 1062 spin_unlock_irqrestore(&rfbi.cmd_lock, flags);
5c18adb3
TV		 1063 atomic_inc(&rfbi.cmd_fifo_full);
1064 wait_for_completion(&rfbi.cmd_done);
1065 /*DSSDBG("Woke up because fifo not full anymore\n");*/
1066 continue;
1067 }
1068
fc248a49 1069 ret = kfifo_in(&rfbi.cmd_fifo, (unsigned char *)p,
5c18adb3
TV		 1070 sizeof(struct update_param));
1071/* DSSDBG("pushed %d bytes\n", ret);*/
1072
fc248a49 1073 spin_unlock_irqrestore(&rfbi.cmd_lock, flags);
5c18adb3
TV		 1074
1075 BUG_ON(ret != sizeof(struct update_param));
1076
1077 break;
1078 }
1079}
1080
1081static void rfbi_push_update(int rfbi_module, int x, int y, int w, int h)
1082{
1083 struct update_param p;
1084
1085 p.rfbi_module = rfbi_module;
1086 p.cmd = RFBI_CMD_UPDATE;
1087
1088 p.par.r.x = x;
1089 p.par.r.y = y;
1090 p.par.r.w = w;
1091 p.par.r.h = h;
1092
1093 DSSDBG("RFBI pushed %d,%d %dx%d\n", x, y, w, h);
1094
1095 rfbi_push_cmd(&p);
1096
1097 process_cmd_fifo();
1098}
1099
1100static void rfbi_push_sync(int rfbi_module, struct completion *sync_comp)
1101{
1102 struct update_param p;
1103
1104 p.rfbi_module = rfbi_module;
1105 p.cmd = RFBI_CMD_SYNC;
1106 p.par.sync = sync_comp;
1107
1108 rfbi_push_cmd(&p);
1109
1110 DSSDBG("RFBI sync pushed to cmd fifo\n");
1111
1112 process_cmd_fifo();
1113}
1114
1115void rfbi_dump_regs(struct seq_file *s)
1116{
1117#define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, rfbi_read_reg(r))
1118
1119 dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1);
1120
1121 DUMPREG(RFBI_REVISION);
1122 DUMPREG(RFBI_SYSCONFIG);
1123 DUMPREG(RFBI_SYSSTATUS);
1124 DUMPREG(RFBI_CONTROL);
1125 DUMPREG(RFBI_PIXEL_CNT);
1126 DUMPREG(RFBI_LINE_NUMBER);
1127 DUMPREG(RFBI_CMD);
1128 DUMPREG(RFBI_PARAM);
1129 DUMPREG(RFBI_DATA);
1130 DUMPREG(RFBI_READ);
1131 DUMPREG(RFBI_STATUS);
1132
1133 DUMPREG(RFBI_CONFIG(0));
1134 DUMPREG(RFBI_ONOFF_TIME(0));
1135 DUMPREG(RFBI_CYCLE_TIME(0));
1136 DUMPREG(RFBI_DATA_CYCLE1(0));
1137 DUMPREG(RFBI_DATA_CYCLE2(0));
1138 DUMPREG(RFBI_DATA_CYCLE3(0));
1139
1140 DUMPREG(RFBI_CONFIG(1));
1141 DUMPREG(RFBI_ONOFF_TIME(1));
1142 DUMPREG(RFBI_CYCLE_TIME(1));
1143 DUMPREG(RFBI_DATA_CYCLE1(1));
1144 DUMPREG(RFBI_DATA_CYCLE2(1));
1145 DUMPREG(RFBI_DATA_CYCLE3(1));
1146
1147 DUMPREG(RFBI_VSYNC_WIDTH);
1148 DUMPREG(RFBI_HSYNC_WIDTH);
1149
1150 dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1);
1151#undef DUMPREG
1152}
1153
1154int rfbi_init(void)
1155{
1156 u32 rev;
1157 u32 l;
fc248a49 1158 int r;
5c18adb3
TV		 1159
1160 spin_lock_init(&rfbi.cmd_lock);
fc248a49
TV		 1161 r = kfifo_alloc(&rfbi.cmd_fifo, RFBI_CMD_FIFO_LEN_BYTES, GFP_KERNEL);
1162 if (r)
1163 return r;
5c18adb3
TV		 1164
1165 init_completion(&rfbi.cmd_done);
1166 atomic_set(&rfbi.cmd_fifo_full, 0);
1167 atomic_set(&rfbi.cmd_pending, 0);
1168
1169 rfbi.base = ioremap(RFBI_BASE, SZ_256);
1170 if (!rfbi.base) {
1171 DSSERR("can't ioremap RFBI\n");
1172 return -ENOMEM;
1173 }
1174
1175 rfbi_enable_clocks(1);
1176
1177 msleep(10);
1178
1179 rfbi.l4_khz = dss_clk_get_rate(DSS_CLK_ICK) / 1000;
1180
1181 /* Enable autoidle and smart-idle */
1182 l = rfbi_read_reg(RFBI_SYSCONFIG);
1183 l |= (1 << 0) | (2 << 3);
1184 rfbi_write_reg(RFBI_SYSCONFIG, l);
1185
1186 rev = rfbi_read_reg(RFBI_REVISION);
1187 printk(KERN_INFO "OMAP RFBI rev %d.%d\n",
1188 FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
1189
1190 rfbi_enable_clocks(0);
1191
1192 return 0;
1193}
1194
1195void rfbi_exit(void)
1196{
1197 DSSDBG("rfbi_exit\n");
1198
fc248a49 1199 kfifo_free(&rfbi.cmd_fifo);
5c18adb3
TV		 1200
1201 iounmap(rfbi.base);
1202}
1203
1204/* struct omap_display support */
1205static int rfbi_display_update(struct omap_dss_device *dssdev,
1206 u16 x, u16 y, u16 w, u16 h)
1207{
1208 int rfbi_module;
1209
1210 if (w == 0 || h == 0)
1211 return 0;
1212
1213 rfbi_module = rfbi_find_display(dssdev);
1214
1215 rfbi_push_update(rfbi_module, x, y, w, h);
1216
1217 return 0;
1218}
1219
1220static int rfbi_display_sync(struct omap_dss_device *dssdev)
1221{
1222 struct completion sync_comp;
1223 int rfbi_module;
1224
1225 rfbi_module = rfbi_find_display(dssdev);
1226
1227 init_completion(&sync_comp);
1228 rfbi_push_sync(rfbi_module, &sync_comp);
1229 DSSDBG("Waiting for SYNC to happen...\n");
1230 wait_for_completion(&sync_comp);
1231 DSSDBG("Released from SYNC\n");
1232 return 0;
1233}
1234
1235static int rfbi_display_enable_te(struct omap_dss_device *dssdev, bool enable)
1236{
1237 dssdev->driver->enable_te(dssdev, enable);
1238 return 0;
1239}
1240
1241static int rfbi_display_enable(struct omap_dss_device *dssdev)
1242{
1243 int r;
1244
1245 r = omap_dss_start_device(dssdev);
1246 if (r) {
1247 DSSERR("failed to start device\n");
1248 goto err0;
1249 }
1250
1251 r = omap_dispc_register_isr(framedone_callback, NULL,
1252 DISPC_IRQ_FRAMEDONE);
1253 if (r) {
1254 DSSERR("can't get FRAMEDONE irq\n");
1255 goto err1;
1256 }
1257
1258 dispc_set_lcd_display_type(OMAP_DSS_LCD_DISPLAY_TFT);
1259
1260 dispc_set_parallel_interface_mode(OMAP_DSS_PARALLELMODE_RFBI);
1261
1262 dispc_set_tft_data_lines(dssdev->ctrl.pixel_size);
1263
1264 rfbi_configure(dssdev->phy.rfbi.channel,
1265 dssdev->ctrl.pixel_size,
1266 dssdev->phy.rfbi.data_lines);
1267
1268 rfbi_set_timings(dssdev->phy.rfbi.channel,
1269 &dssdev->ctrl.rfbi_timings);
1270
1271
1272 if (dssdev->driver->enable) {
1273 r = dssdev->driver->enable(dssdev);
1274 if (r)
1275 goto err2;
1276 }
1277
1278 return 0;
1279err2:
1280 omap_dispc_unregister_isr(framedone_callback, NULL,
1281 DISPC_IRQ_FRAMEDONE);
1282err1:
1283 omap_dss_stop_device(dssdev);
1284err0:
1285 return r;
1286}
1287
1288static void rfbi_display_disable(struct omap_dss_device *dssdev)
1289{
1290 dssdev->driver->disable(dssdev);
1291 omap_dispc_unregister_isr(framedone_callback, NULL,
1292 DISPC_IRQ_FRAMEDONE);
1293 omap_dss_stop_device(dssdev);
1294}
1295
1296int rfbi_init_display(struct omap_dss_device *dssdev)
1297{
1298 dssdev->enable = rfbi_display_enable;
1299 dssdev->disable = rfbi_display_disable;
1300 dssdev->update = rfbi_display_update;
1301 dssdev->sync = rfbi_display_sync;
1302 dssdev->enable_te = rfbi_display_enable_te;
1303
1304 rfbi.dssdev[dssdev->phy.rfbi.channel] = dssdev;
1305
1306 dssdev->caps = OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE;
1307
1308 return 0;
1309}
Linux 6.x block layer and io_uring tree(s)