These changes are the raw update to linux-4.4.6-rt14. Kernel sources
[kvmfornfv.git] / kernel / drivers / video / fbdev / omap2 / dss / rfbi.c
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 #include <linux/component.h>
40
41 #include <video/omapdss.h>
42 #include "dss.h"
43
44 struct rfbi_reg { u16 idx; };
45
46 #define RFBI_REG(idx)           ((const struct rfbi_reg) { idx })
47
48 #define RFBI_REVISION           RFBI_REG(0x0000)
49 #define RFBI_SYSCONFIG          RFBI_REG(0x0010)
50 #define RFBI_SYSSTATUS          RFBI_REG(0x0014)
51 #define RFBI_CONTROL            RFBI_REG(0x0040)
52 #define RFBI_PIXEL_CNT          RFBI_REG(0x0044)
53 #define RFBI_LINE_NUMBER        RFBI_REG(0x0048)
54 #define RFBI_CMD                RFBI_REG(0x004c)
55 #define RFBI_PARAM              RFBI_REG(0x0050)
56 #define RFBI_DATA               RFBI_REG(0x0054)
57 #define RFBI_READ               RFBI_REG(0x0058)
58 #define RFBI_STATUS             RFBI_REG(0x005c)
59
60 #define RFBI_CONFIG(n)          RFBI_REG(0x0060 + (n)*0x18)
61 #define RFBI_ONOFF_TIME(n)      RFBI_REG(0x0064 + (n)*0x18)
62 #define RFBI_CYCLE_TIME(n)      RFBI_REG(0x0068 + (n)*0x18)
63 #define RFBI_DATA_CYCLE1(n)     RFBI_REG(0x006c + (n)*0x18)
64 #define RFBI_DATA_CYCLE2(n)     RFBI_REG(0x0070 + (n)*0x18)
65 #define RFBI_DATA_CYCLE3(n)     RFBI_REG(0x0074 + (n)*0x18)
66
67 #define RFBI_VSYNC_WIDTH        RFBI_REG(0x0090)
68 #define RFBI_HSYNC_WIDTH        RFBI_REG(0x0094)
69
70 #define REG_FLD_MOD(idx, val, start, end) \
71         rfbi_write_reg(idx, FLD_MOD(rfbi_read_reg(idx), val, start, end))
72
73 enum omap_rfbi_cycleformat {
74         OMAP_DSS_RFBI_CYCLEFORMAT_1_1 = 0,
75         OMAP_DSS_RFBI_CYCLEFORMAT_2_1 = 1,
76         OMAP_DSS_RFBI_CYCLEFORMAT_3_1 = 2,
77         OMAP_DSS_RFBI_CYCLEFORMAT_3_2 = 3,
78 };
79
80 enum omap_rfbi_datatype {
81         OMAP_DSS_RFBI_DATATYPE_12 = 0,
82         OMAP_DSS_RFBI_DATATYPE_16 = 1,
83         OMAP_DSS_RFBI_DATATYPE_18 = 2,
84         OMAP_DSS_RFBI_DATATYPE_24 = 3,
85 };
86
87 enum omap_rfbi_parallelmode {
88         OMAP_DSS_RFBI_PARALLELMODE_8 = 0,
89         OMAP_DSS_RFBI_PARALLELMODE_9 = 1,
90         OMAP_DSS_RFBI_PARALLELMODE_12 = 2,
91         OMAP_DSS_RFBI_PARALLELMODE_16 = 3,
92 };
93
94 static int rfbi_convert_timings(struct rfbi_timings *t);
95 static void rfbi_get_clk_info(u32 *clk_period, u32 *max_clk_div);
96
97 static struct {
98         struct platform_device *pdev;
99         void __iomem    *base;
100
101         unsigned long   l4_khz;
102
103         enum omap_rfbi_datatype datatype;
104         enum omap_rfbi_parallelmode parallelmode;
105
106         enum omap_rfbi_te_mode te_mode;
107         int te_enabled;
108
109         void (*framedone_callback)(void *data);
110         void *framedone_callback_data;
111
112         struct omap_dss_device *dssdev[2];
113
114         struct semaphore bus_lock;
115
116         struct omap_video_timings timings;
117         int pixel_size;
118         int data_lines;
119         struct rfbi_timings intf_timings;
120
121         struct omap_dss_device output;
122 } rfbi;
123
124 static inline void rfbi_write_reg(const struct rfbi_reg idx, u32 val)
125 {
126         __raw_writel(val, rfbi.base + idx.idx);
127 }
128
129 static inline u32 rfbi_read_reg(const struct rfbi_reg idx)
130 {
131         return __raw_readl(rfbi.base + idx.idx);
132 }
133
134 static int rfbi_runtime_get(void)
135 {
136         int r;
137
138         DSSDBG("rfbi_runtime_get\n");
139
140         r = pm_runtime_get_sync(&rfbi.pdev->dev);
141         WARN_ON(r < 0);
142         return r < 0 ? r : 0;
143 }
144
145 static void rfbi_runtime_put(void)
146 {
147         int r;
148
149         DSSDBG("rfbi_runtime_put\n");
150
151         r = pm_runtime_put_sync(&rfbi.pdev->dev);
152         WARN_ON(r < 0 && r != -ENOSYS);
153 }
154
155 static void rfbi_bus_lock(void)
156 {
157         down(&rfbi.bus_lock);
158 }
159
160 static void rfbi_bus_unlock(void)
161 {
162         up(&rfbi.bus_lock);
163 }
164
165 static void rfbi_write_command(const void *buf, u32 len)
166 {
167         switch (rfbi.parallelmode) {
168         case OMAP_DSS_RFBI_PARALLELMODE_8:
169         {
170                 const u8 *b = buf;
171                 for (; len; len--)
172                         rfbi_write_reg(RFBI_CMD, *b++);
173                 break;
174         }
175
176         case OMAP_DSS_RFBI_PARALLELMODE_16:
177         {
178                 const u16 *w = buf;
179                 BUG_ON(len & 1);
180                 for (; len; len -= 2)
181                         rfbi_write_reg(RFBI_CMD, *w++);
182                 break;
183         }
184
185         case OMAP_DSS_RFBI_PARALLELMODE_9:
186         case OMAP_DSS_RFBI_PARALLELMODE_12:
187         default:
188                 BUG();
189         }
190 }
191
192 static void rfbi_read_data(void *buf, u32 len)
193 {
194         switch (rfbi.parallelmode) {
195         case OMAP_DSS_RFBI_PARALLELMODE_8:
196         {
197                 u8 *b = buf;
198                 for (; len; len--) {
199                         rfbi_write_reg(RFBI_READ, 0);
200                         *b++ = rfbi_read_reg(RFBI_READ);
201                 }
202                 break;
203         }
204
205         case OMAP_DSS_RFBI_PARALLELMODE_16:
206         {
207                 u16 *w = buf;
208                 BUG_ON(len & ~1);
209                 for (; len; len -= 2) {
210                         rfbi_write_reg(RFBI_READ, 0);
211                         *w++ = rfbi_read_reg(RFBI_READ);
212                 }
213                 break;
214         }
215
216         case OMAP_DSS_RFBI_PARALLELMODE_9:
217         case OMAP_DSS_RFBI_PARALLELMODE_12:
218         default:
219                 BUG();
220         }
221 }
222
223 static void rfbi_write_data(const void *buf, u32 len)
224 {
225         switch (rfbi.parallelmode) {
226         case OMAP_DSS_RFBI_PARALLELMODE_8:
227         {
228                 const u8 *b = buf;
229                 for (; len; len--)
230                         rfbi_write_reg(RFBI_PARAM, *b++);
231                 break;
232         }
233
234         case OMAP_DSS_RFBI_PARALLELMODE_16:
235         {
236                 const u16 *w = buf;
237                 BUG_ON(len & 1);
238                 for (; len; len -= 2)
239                         rfbi_write_reg(RFBI_PARAM, *w++);
240                 break;
241         }
242
243         case OMAP_DSS_RFBI_PARALLELMODE_9:
244         case OMAP_DSS_RFBI_PARALLELMODE_12:
245         default:
246                 BUG();
247
248         }
249 }
250
251 static void rfbi_write_pixels(const void __iomem *buf, int scr_width,
252                 u16 x, u16 y,
253                 u16 w, u16 h)
254 {
255         int start_offset = scr_width * y + x;
256         int horiz_offset = scr_width - w;
257         int i;
258
259         if (rfbi.datatype == OMAP_DSS_RFBI_DATATYPE_16 &&
260            rfbi.parallelmode == OMAP_DSS_RFBI_PARALLELMODE_8) {
261                 const u16 __iomem *pd = buf;
262                 pd += start_offset;
263
264                 for (; h; --h) {
265                         for (i = 0; i < w; ++i) {
266                                 const u8 __iomem *b = (const u8 __iomem *)pd;
267                                 rfbi_write_reg(RFBI_PARAM, __raw_readb(b+1));
268                                 rfbi_write_reg(RFBI_PARAM, __raw_readb(b+0));
269                                 ++pd;
270                         }
271                         pd += horiz_offset;
272                 }
273         } else if (rfbi.datatype == OMAP_DSS_RFBI_DATATYPE_24 &&
274            rfbi.parallelmode == OMAP_DSS_RFBI_PARALLELMODE_8) {
275                 const u32 __iomem *pd = buf;
276                 pd += start_offset;
277
278                 for (; h; --h) {
279                         for (i = 0; i < w; ++i) {
280                                 const u8 __iomem *b = (const u8 __iomem *)pd;
281                                 rfbi_write_reg(RFBI_PARAM, __raw_readb(b+2));
282                                 rfbi_write_reg(RFBI_PARAM, __raw_readb(b+1));
283                                 rfbi_write_reg(RFBI_PARAM, __raw_readb(b+0));
284                                 ++pd;
285                         }
286                         pd += horiz_offset;
287                 }
288         } else if (rfbi.datatype == OMAP_DSS_RFBI_DATATYPE_16 &&
289            rfbi.parallelmode == OMAP_DSS_RFBI_PARALLELMODE_16) {
290                 const u16 __iomem *pd = buf;
291                 pd += start_offset;
292
293                 for (; h; --h) {
294                         for (i = 0; i < w; ++i) {
295                                 rfbi_write_reg(RFBI_PARAM, __raw_readw(pd));
296                                 ++pd;
297                         }
298                         pd += horiz_offset;
299                 }
300         } else {
301                 BUG();
302         }
303 }
304
305 static int rfbi_transfer_area(struct omap_dss_device *dssdev,
306                 void (*callback)(void *data), void *data)
307 {
308         u32 l;
309         int r;
310         struct omap_overlay_manager *mgr = rfbi.output.manager;
311         u16 width = rfbi.timings.x_res;
312         u16 height = rfbi.timings.y_res;
313
314         /*BUG_ON(callback == 0);*/
315         BUG_ON(rfbi.framedone_callback != NULL);
316
317         DSSDBG("rfbi_transfer_area %dx%d\n", width, height);
318
319         dss_mgr_set_timings(mgr, &rfbi.timings);
320
321         r = dss_mgr_enable(mgr);
322         if (r)
323                 return r;
324
325         rfbi.framedone_callback = callback;
326         rfbi.framedone_callback_data = data;
327
328         rfbi_write_reg(RFBI_PIXEL_CNT, width * height);
329
330         l = rfbi_read_reg(RFBI_CONTROL);
331         l = FLD_MOD(l, 1, 0, 0); /* enable */
332         if (!rfbi.te_enabled)
333                 l = FLD_MOD(l, 1, 4, 4); /* ITE */
334
335         rfbi_write_reg(RFBI_CONTROL, l);
336
337         return 0;
338 }
339
340 static void framedone_callback(void *data)
341 {
342         void (*callback)(void *data);
343
344         DSSDBG("FRAMEDONE\n");
345
346         REG_FLD_MOD(RFBI_CONTROL, 0, 0, 0);
347
348         callback = rfbi.framedone_callback;
349         rfbi.framedone_callback = NULL;
350
351         if (callback != NULL)
352                 callback(rfbi.framedone_callback_data);
353 }
354
355 #if 1 /* VERBOSE */
356 static void rfbi_print_timings(void)
357 {
358         u32 l;
359         u32 time;
360
361         l = rfbi_read_reg(RFBI_CONFIG(0));
362         time = 1000000000 / rfbi.l4_khz;
363         if (l & (1 << 4))
364                 time *= 2;
365
366         DSSDBG("Tick time %u ps\n", time);
367         l = rfbi_read_reg(RFBI_ONOFF_TIME(0));
368         DSSDBG("CSONTIME %d, CSOFFTIME %d, WEONTIME %d, WEOFFTIME %d, "
369                 "REONTIME %d, REOFFTIME %d\n",
370                 l & 0x0f, (l >> 4) & 0x3f, (l >> 10) & 0x0f, (l >> 14) & 0x3f,
371                 (l >> 20) & 0x0f, (l >> 24) & 0x3f);
372
373         l = rfbi_read_reg(RFBI_CYCLE_TIME(0));
374         DSSDBG("WECYCLETIME %d, RECYCLETIME %d, CSPULSEWIDTH %d, "
375                 "ACCESSTIME %d\n",
376                 (l & 0x3f), (l >> 6) & 0x3f, (l >> 12) & 0x3f,
377                 (l >> 22) & 0x3f);
378 }
379 #else
380 static void rfbi_print_timings(void) {}
381 #endif
382
383
384
385
386 static u32 extif_clk_period;
387
388 static inline unsigned long round_to_extif_ticks(unsigned long ps, int div)
389 {
390         int bus_tick = extif_clk_period * div;
391         return (ps + bus_tick - 1) / bus_tick * bus_tick;
392 }
393
394 static int calc_reg_timing(struct rfbi_timings *t, int div)
395 {
396         t->clk_div = div;
397
398         t->cs_on_time = round_to_extif_ticks(t->cs_on_time, div);
399
400         t->we_on_time = round_to_extif_ticks(t->we_on_time, div);
401         t->we_off_time = round_to_extif_ticks(t->we_off_time, div);
402         t->we_cycle_time = round_to_extif_ticks(t->we_cycle_time, div);
403
404         t->re_on_time = round_to_extif_ticks(t->re_on_time, div);
405         t->re_off_time = round_to_extif_ticks(t->re_off_time, div);
406         t->re_cycle_time = round_to_extif_ticks(t->re_cycle_time, div);
407
408         t->access_time = round_to_extif_ticks(t->access_time, div);
409         t->cs_off_time = round_to_extif_ticks(t->cs_off_time, div);
410         t->cs_pulse_width = round_to_extif_ticks(t->cs_pulse_width, div);
411
412         DSSDBG("[reg]cson %d csoff %d reon %d reoff %d\n",
413                t->cs_on_time, t->cs_off_time, t->re_on_time, t->re_off_time);
414         DSSDBG("[reg]weon %d weoff %d recyc %d wecyc %d\n",
415                t->we_on_time, t->we_off_time, t->re_cycle_time,
416                t->we_cycle_time);
417         DSSDBG("[reg]rdaccess %d cspulse %d\n",
418                t->access_time, t->cs_pulse_width);
419
420         return rfbi_convert_timings(t);
421 }
422
423 static int calc_extif_timings(struct rfbi_timings *t)
424 {
425         u32 max_clk_div;
426         int div;
427
428         rfbi_get_clk_info(&extif_clk_period, &max_clk_div);
429         for (div = 1; div <= max_clk_div; div++) {
430                 if (calc_reg_timing(t, div) == 0)
431                         break;
432         }
433
434         if (div <= max_clk_div)
435                 return 0;
436
437         DSSERR("can't setup timings\n");
438         return -1;
439 }
440
441
442 static void rfbi_set_timings(int rfbi_module, struct rfbi_timings *t)
443 {
444         int r;
445
446         if (!t->converted) {
447                 r = calc_extif_timings(t);
448                 if (r < 0)
449                         DSSERR("Failed to calc timings\n");
450         }
451
452         BUG_ON(!t->converted);
453
454         rfbi_write_reg(RFBI_ONOFF_TIME(rfbi_module), t->tim[0]);
455         rfbi_write_reg(RFBI_CYCLE_TIME(rfbi_module), t->tim[1]);
456
457         /* TIMEGRANULARITY */
458         REG_FLD_MOD(RFBI_CONFIG(rfbi_module),
459                     (t->tim[2] ? 1 : 0), 4, 4);
460
461         rfbi_print_timings();
462 }
463
464 static int ps_to_rfbi_ticks(int time, int div)
465 {
466         unsigned long tick_ps;
467         int ret;
468
469         /* Calculate in picosecs to yield more exact results */
470         tick_ps = 1000000000 / (rfbi.l4_khz) * div;
471
472         ret = (time + tick_ps - 1) / tick_ps;
473
474         return ret;
475 }
476
477 static void rfbi_get_clk_info(u32 *clk_period, u32 *max_clk_div)
478 {
479         *clk_period = 1000000000 / rfbi.l4_khz;
480         *max_clk_div = 2;
481 }
482
483 static int rfbi_convert_timings(struct rfbi_timings *t)
484 {
485         u32 l;
486         int reon, reoff, weon, weoff, cson, csoff, cs_pulse;
487         int actim, recyc, wecyc;
488         int div = t->clk_div;
489
490         if (div <= 0 || div > 2)
491                 return -1;
492
493         /* Make sure that after conversion it still holds that:
494          * weoff > weon, reoff > reon, recyc >= reoff, wecyc >= weoff,
495          * csoff > cson, csoff >= max(weoff, reoff), actim > reon
496          */
497         weon = ps_to_rfbi_ticks(t->we_on_time, div);
498         weoff = ps_to_rfbi_ticks(t->we_off_time, div);
499         if (weoff <= weon)
500                 weoff = weon + 1;
501         if (weon > 0x0f)
502                 return -1;
503         if (weoff > 0x3f)
504                 return -1;
505
506         reon = ps_to_rfbi_ticks(t->re_on_time, div);
507         reoff = ps_to_rfbi_ticks(t->re_off_time, div);
508         if (reoff <= reon)
509                 reoff = reon + 1;
510         if (reon > 0x0f)
511                 return -1;
512         if (reoff > 0x3f)
513                 return -1;
514
515         cson = ps_to_rfbi_ticks(t->cs_on_time, div);
516         csoff = ps_to_rfbi_ticks(t->cs_off_time, div);
517         if (csoff <= cson)
518                 csoff = cson + 1;
519         if (csoff < max(weoff, reoff))
520                 csoff = max(weoff, reoff);
521         if (cson > 0x0f)
522                 return -1;
523         if (csoff > 0x3f)
524                 return -1;
525
526         l =  cson;
527         l |= csoff << 4;
528         l |= weon  << 10;
529         l |= weoff << 14;
530         l |= reon  << 20;
531         l |= reoff << 24;
532
533         t->tim[0] = l;
534
535         actim = ps_to_rfbi_ticks(t->access_time, div);
536         if (actim <= reon)
537                 actim = reon + 1;
538         if (actim > 0x3f)
539                 return -1;
540
541         wecyc = ps_to_rfbi_ticks(t->we_cycle_time, div);
542         if (wecyc < weoff)
543                 wecyc = weoff;
544         if (wecyc > 0x3f)
545                 return -1;
546
547         recyc = ps_to_rfbi_ticks(t->re_cycle_time, div);
548         if (recyc < reoff)
549                 recyc = reoff;
550         if (recyc > 0x3f)
551                 return -1;
552
553         cs_pulse = ps_to_rfbi_ticks(t->cs_pulse_width, div);
554         if (cs_pulse > 0x3f)
555                 return -1;
556
557         l =  wecyc;
558         l |= recyc    << 6;
559         l |= cs_pulse << 12;
560         l |= actim    << 22;
561
562         t->tim[1] = l;
563
564         t->tim[2] = div - 1;
565
566         t->converted = 1;
567
568         return 0;
569 }
570
571 /* xxx FIX module selection missing */
572 static int rfbi_setup_te(enum omap_rfbi_te_mode mode,
573                              unsigned hs_pulse_time, unsigned vs_pulse_time,
574                              int hs_pol_inv, int vs_pol_inv, int extif_div)
575 {
576         int hs, vs;
577         int min;
578         u32 l;
579
580         hs = ps_to_rfbi_ticks(hs_pulse_time, 1);
581         vs = ps_to_rfbi_ticks(vs_pulse_time, 1);
582         if (hs < 2)
583                 return -EDOM;
584         if (mode == OMAP_DSS_RFBI_TE_MODE_2)
585                 min = 2;
586         else /* OMAP_DSS_RFBI_TE_MODE_1 */
587                 min = 4;
588         if (vs < min)
589                 return -EDOM;
590         if (vs == hs)
591                 return -EINVAL;
592         rfbi.te_mode = mode;
593         DSSDBG("setup_te: mode %d hs %d vs %d hs_inv %d vs_inv %d\n",
594                 mode, hs, vs, hs_pol_inv, vs_pol_inv);
595
596         rfbi_write_reg(RFBI_HSYNC_WIDTH, hs);
597         rfbi_write_reg(RFBI_VSYNC_WIDTH, vs);
598
599         l = rfbi_read_reg(RFBI_CONFIG(0));
600         if (hs_pol_inv)
601                 l &= ~(1 << 21);
602         else
603                 l |= 1 << 21;
604         if (vs_pol_inv)
605                 l &= ~(1 << 20);
606         else
607                 l |= 1 << 20;
608
609         return 0;
610 }
611
612 /* xxx FIX module selection missing */
613 static int rfbi_enable_te(bool enable, unsigned line)
614 {
615         u32 l;
616
617         DSSDBG("te %d line %d mode %d\n", enable, line, rfbi.te_mode);
618         if (line > (1 << 11) - 1)
619                 return -EINVAL;
620
621         l = rfbi_read_reg(RFBI_CONFIG(0));
622         l &= ~(0x3 << 2);
623         if (enable) {
624                 rfbi.te_enabled = 1;
625                 l |= rfbi.te_mode << 2;
626         } else
627                 rfbi.te_enabled = 0;
628         rfbi_write_reg(RFBI_CONFIG(0), l);
629         rfbi_write_reg(RFBI_LINE_NUMBER, line);
630
631         return 0;
632 }
633
634 static int rfbi_configure_bus(int rfbi_module, int bpp, int lines)
635 {
636         u32 l;
637         int cycle1 = 0, cycle2 = 0, cycle3 = 0;
638         enum omap_rfbi_cycleformat cycleformat;
639         enum omap_rfbi_datatype datatype;
640         enum omap_rfbi_parallelmode parallelmode;
641
642         switch (bpp) {
643         case 12:
644                 datatype = OMAP_DSS_RFBI_DATATYPE_12;
645                 break;
646         case 16:
647                 datatype = OMAP_DSS_RFBI_DATATYPE_16;
648                 break;
649         case 18:
650                 datatype = OMAP_DSS_RFBI_DATATYPE_18;
651                 break;
652         case 24:
653                 datatype = OMAP_DSS_RFBI_DATATYPE_24;
654                 break;
655         default:
656                 BUG();
657                 return 1;
658         }
659         rfbi.datatype = datatype;
660
661         switch (lines) {
662         case 8:
663                 parallelmode = OMAP_DSS_RFBI_PARALLELMODE_8;
664                 break;
665         case 9:
666                 parallelmode = OMAP_DSS_RFBI_PARALLELMODE_9;
667                 break;
668         case 12:
669                 parallelmode = OMAP_DSS_RFBI_PARALLELMODE_12;
670                 break;
671         case 16:
672                 parallelmode = OMAP_DSS_RFBI_PARALLELMODE_16;
673                 break;
674         default:
675                 BUG();
676                 return 1;
677         }
678         rfbi.parallelmode = parallelmode;
679
680         if ((bpp % lines) == 0) {
681                 switch (bpp / lines) {
682                 case 1:
683                         cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_1_1;
684                         break;
685                 case 2:
686                         cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_2_1;
687                         break;
688                 case 3:
689                         cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_3_1;
690                         break;
691                 default:
692                         BUG();
693                         return 1;
694                 }
695         } else if ((2 * bpp % lines) == 0) {
696                 if ((2 * bpp / lines) == 3)
697                         cycleformat = OMAP_DSS_RFBI_CYCLEFORMAT_3_2;
698                 else {
699                         BUG();
700                         return 1;
701                 }
702         } else {
703                 BUG();
704                 return 1;
705         }
706
707         switch (cycleformat) {
708         case OMAP_DSS_RFBI_CYCLEFORMAT_1_1:
709                 cycle1 = lines;
710                 break;
711
712         case OMAP_DSS_RFBI_CYCLEFORMAT_2_1:
713                 cycle1 = lines;
714                 cycle2 = lines;
715                 break;
716
717         case OMAP_DSS_RFBI_CYCLEFORMAT_3_1:
718                 cycle1 = lines;
719                 cycle2 = lines;
720                 cycle3 = lines;
721                 break;
722
723         case OMAP_DSS_RFBI_CYCLEFORMAT_3_2:
724                 cycle1 = lines;
725                 cycle2 = (lines / 2) | ((lines / 2) << 16);
726                 cycle3 = (lines << 16);
727                 break;
728         }
729
730         REG_FLD_MOD(RFBI_CONTROL, 0, 3, 2); /* clear CS */
731
732         l = 0;
733         l |= FLD_VAL(parallelmode, 1, 0);
734         l |= FLD_VAL(0, 3, 2);          /* TRIGGERMODE: ITE */
735         l |= FLD_VAL(0, 4, 4);          /* TIMEGRANULARITY */
736         l |= FLD_VAL(datatype, 6, 5);
737         /* l |= FLD_VAL(2, 8, 7); */    /* L4FORMAT, 2pix/L4 */
738         l |= FLD_VAL(0, 8, 7);  /* L4FORMAT, 1pix/L4 */
739         l |= FLD_VAL(cycleformat, 10, 9);
740         l |= FLD_VAL(0, 12, 11);        /* UNUSEDBITS */
741         l |= FLD_VAL(0, 16, 16);        /* A0POLARITY */
742         l |= FLD_VAL(0, 17, 17);        /* REPOLARITY */
743         l |= FLD_VAL(0, 18, 18);        /* WEPOLARITY */
744         l |= FLD_VAL(0, 19, 19);        /* CSPOLARITY */
745         l |= FLD_VAL(1, 20, 20);        /* TE_VSYNC_POLARITY */
746         l |= FLD_VAL(1, 21, 21);        /* HSYNCPOLARITY */
747         rfbi_write_reg(RFBI_CONFIG(rfbi_module), l);
748
749         rfbi_write_reg(RFBI_DATA_CYCLE1(rfbi_module), cycle1);
750         rfbi_write_reg(RFBI_DATA_CYCLE2(rfbi_module), cycle2);
751         rfbi_write_reg(RFBI_DATA_CYCLE3(rfbi_module), cycle3);
752
753
754         l = rfbi_read_reg(RFBI_CONTROL);
755         l = FLD_MOD(l, rfbi_module+1, 3, 2); /* Select CSx */
756         l = FLD_MOD(l, 0, 1, 1); /* clear bypass */
757         rfbi_write_reg(RFBI_CONTROL, l);
758
759
760         DSSDBG("RFBI config: bpp %d, lines %d, cycles: 0x%x 0x%x 0x%x\n",
761                bpp, lines, cycle1, cycle2, cycle3);
762
763         return 0;
764 }
765
766 static int rfbi_configure(struct omap_dss_device *dssdev)
767 {
768         return rfbi_configure_bus(dssdev->phy.rfbi.channel, rfbi.pixel_size,
769                         rfbi.data_lines);
770 }
771
772 static int rfbi_update(struct omap_dss_device *dssdev, void (*callback)(void *),
773                 void *data)
774 {
775         return rfbi_transfer_area(dssdev, callback, data);
776 }
777
778 static void rfbi_set_size(struct omap_dss_device *dssdev, u16 w, u16 h)
779 {
780         rfbi.timings.x_res = w;
781         rfbi.timings.y_res = h;
782 }
783
784 static void rfbi_set_pixel_size(struct omap_dss_device *dssdev, int pixel_size)
785 {
786         rfbi.pixel_size = pixel_size;
787 }
788
789 static void rfbi_set_data_lines(struct omap_dss_device *dssdev, int data_lines)
790 {
791         rfbi.data_lines = data_lines;
792 }
793
794 static void rfbi_set_interface_timings(struct omap_dss_device *dssdev,
795                 struct rfbi_timings *timings)
796 {
797         rfbi.intf_timings = *timings;
798 }
799
800 static void rfbi_dump_regs(struct seq_file *s)
801 {
802 #define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, rfbi_read_reg(r))
803
804         if (rfbi_runtime_get())
805                 return;
806
807         DUMPREG(RFBI_REVISION);
808         DUMPREG(RFBI_SYSCONFIG);
809         DUMPREG(RFBI_SYSSTATUS);
810         DUMPREG(RFBI_CONTROL);
811         DUMPREG(RFBI_PIXEL_CNT);
812         DUMPREG(RFBI_LINE_NUMBER);
813         DUMPREG(RFBI_CMD);
814         DUMPREG(RFBI_PARAM);
815         DUMPREG(RFBI_DATA);
816         DUMPREG(RFBI_READ);
817         DUMPREG(RFBI_STATUS);
818
819         DUMPREG(RFBI_CONFIG(0));
820         DUMPREG(RFBI_ONOFF_TIME(0));
821         DUMPREG(RFBI_CYCLE_TIME(0));
822         DUMPREG(RFBI_DATA_CYCLE1(0));
823         DUMPREG(RFBI_DATA_CYCLE2(0));
824         DUMPREG(RFBI_DATA_CYCLE3(0));
825
826         DUMPREG(RFBI_CONFIG(1));
827         DUMPREG(RFBI_ONOFF_TIME(1));
828         DUMPREG(RFBI_CYCLE_TIME(1));
829         DUMPREG(RFBI_DATA_CYCLE1(1));
830         DUMPREG(RFBI_DATA_CYCLE2(1));
831         DUMPREG(RFBI_DATA_CYCLE3(1));
832
833         DUMPREG(RFBI_VSYNC_WIDTH);
834         DUMPREG(RFBI_HSYNC_WIDTH);
835
836         rfbi_runtime_put();
837 #undef DUMPREG
838 }
839
840 static void rfbi_config_lcd_manager(struct omap_dss_device *dssdev)
841 {
842         struct omap_overlay_manager *mgr = rfbi.output.manager;
843         struct dss_lcd_mgr_config mgr_config;
844
845         mgr_config.io_pad_mode = DSS_IO_PAD_MODE_RFBI;
846
847         mgr_config.stallmode = true;
848         /* Do we need fifohandcheck for RFBI? */
849         mgr_config.fifohandcheck = false;
850
851         mgr_config.video_port_width = rfbi.pixel_size;
852         mgr_config.lcden_sig_polarity = 0;
853
854         dss_mgr_set_lcd_config(mgr, &mgr_config);
855
856         /*
857          * Set rfbi.timings with default values, the x_res and y_res fields
858          * are expected to be already configured by the panel driver via
859          * omapdss_rfbi_set_size()
860          */
861         rfbi.timings.hsw = 1;
862         rfbi.timings.hfp = 1;
863         rfbi.timings.hbp = 1;
864         rfbi.timings.vsw = 1;
865         rfbi.timings.vfp = 0;
866         rfbi.timings.vbp = 0;
867
868         rfbi.timings.interlace = false;
869         rfbi.timings.hsync_level = OMAPDSS_SIG_ACTIVE_HIGH;
870         rfbi.timings.vsync_level = OMAPDSS_SIG_ACTIVE_HIGH;
871         rfbi.timings.data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
872         rfbi.timings.de_level = OMAPDSS_SIG_ACTIVE_HIGH;
873         rfbi.timings.sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE;
874
875         dss_mgr_set_timings(mgr, &rfbi.timings);
876 }
877
878 static int rfbi_display_enable(struct omap_dss_device *dssdev)
879 {
880         struct omap_dss_device *out = &rfbi.output;
881         int r;
882
883         if (out == NULL || out->manager == NULL) {
884                 DSSERR("failed to enable display: no output/manager\n");
885                 return -ENODEV;
886         }
887
888         r = rfbi_runtime_get();
889         if (r)
890                 return r;
891
892         r = dss_mgr_register_framedone_handler(out->manager,
893                         framedone_callback, NULL);
894         if (r) {
895                 DSSERR("can't get FRAMEDONE irq\n");
896                 goto err1;
897         }
898
899         rfbi_config_lcd_manager(dssdev);
900
901         rfbi_configure_bus(dssdev->phy.rfbi.channel, rfbi.pixel_size,
902                         rfbi.data_lines);
903
904         rfbi_set_timings(dssdev->phy.rfbi.channel, &rfbi.intf_timings);
905
906         return 0;
907 err1:
908         rfbi_runtime_put();
909         return r;
910 }
911
912 static void rfbi_display_disable(struct omap_dss_device *dssdev)
913 {
914         struct omap_dss_device *out = &rfbi.output;
915
916         dss_mgr_unregister_framedone_handler(out->manager,
917                         framedone_callback, NULL);
918
919         rfbi_runtime_put();
920 }
921
922 static int rfbi_init_display(struct omap_dss_device *dssdev)
923 {
924         rfbi.dssdev[dssdev->phy.rfbi.channel] = dssdev;
925         return 0;
926 }
927
928 static void rfbi_init_output(struct platform_device *pdev)
929 {
930         struct omap_dss_device *out = &rfbi.output;
931
932         out->dev = &pdev->dev;
933         out->id = OMAP_DSS_OUTPUT_DBI;
934         out->output_type = OMAP_DISPLAY_TYPE_DBI;
935         out->name = "rfbi.0";
936         out->dispc_channel = OMAP_DSS_CHANNEL_LCD;
937         out->owner = THIS_MODULE;
938
939         omapdss_register_output(out);
940 }
941
942 static void rfbi_uninit_output(struct platform_device *pdev)
943 {
944         struct omap_dss_device *out = &rfbi.output;
945
946         omapdss_unregister_output(out);
947 }
948
949 /* RFBI HW IP initialisation */
950 static int rfbi_bind(struct device *dev, struct device *master, void *data)
951 {
952         struct platform_device *pdev = to_platform_device(dev);
953         u32 rev;
954         struct resource *rfbi_mem;
955         struct clk *clk;
956         int r;
957
958         rfbi.pdev = pdev;
959
960         sema_init(&rfbi.bus_lock, 1);
961
962         rfbi_mem = platform_get_resource(rfbi.pdev, IORESOURCE_MEM, 0);
963         if (!rfbi_mem) {
964                 DSSERR("can't get IORESOURCE_MEM RFBI\n");
965                 return -EINVAL;
966         }
967
968         rfbi.base = devm_ioremap(&pdev->dev, rfbi_mem->start,
969                                  resource_size(rfbi_mem));
970         if (!rfbi.base) {
971                 DSSERR("can't ioremap RFBI\n");
972                 return -ENOMEM;
973         }
974
975         clk = clk_get(&pdev->dev, "ick");
976         if (IS_ERR(clk)) {
977                 DSSERR("can't get ick\n");
978                 return PTR_ERR(clk);
979         }
980
981         rfbi.l4_khz = clk_get_rate(clk) / 1000;
982
983         clk_put(clk);
984
985         pm_runtime_enable(&pdev->dev);
986
987         r = rfbi_runtime_get();
988         if (r)
989                 goto err_runtime_get;
990
991         msleep(10);
992
993         rev = rfbi_read_reg(RFBI_REVISION);
994         dev_dbg(&pdev->dev, "OMAP RFBI rev %d.%d\n",
995                FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
996
997         rfbi_runtime_put();
998
999         dss_debugfs_create_file("rfbi", rfbi_dump_regs);
1000
1001         rfbi_init_output(pdev);
1002
1003         return 0;
1004
1005 err_runtime_get:
1006         pm_runtime_disable(&pdev->dev);
1007         return r;
1008 }
1009
1010 static void rfbi_unbind(struct device *dev, struct device *master, void *data)
1011 {
1012         struct platform_device *pdev = to_platform_device(dev);
1013
1014         rfbi_uninit_output(pdev);
1015
1016         pm_runtime_disable(&pdev->dev);
1017
1018         return 0;
1019 }
1020
1021 static const struct component_ops rfbi_component_ops = {
1022         .bind   = rfbi_bind,
1023         .unbind = rfbi_unbind,
1024 };
1025
1026 static int rfbi_probe(struct platform_device *pdev)
1027 {
1028         return component_add(&pdev->dev, &rfbi_component_ops);
1029 }
1030
1031 static int rfbi_remove(struct platform_device *pdev)
1032 {
1033         component_del(&pdev->dev, &rfbi_component_ops);
1034         return 0;
1035 }
1036
1037 static int rfbi_runtime_suspend(struct device *dev)
1038 {
1039         dispc_runtime_put();
1040
1041         return 0;
1042 }
1043
1044 static int rfbi_runtime_resume(struct device *dev)
1045 {
1046         int r;
1047
1048         r = dispc_runtime_get();
1049         if (r < 0)
1050                 return r;
1051
1052         return 0;
1053 }
1054
1055 static const struct dev_pm_ops rfbi_pm_ops = {
1056         .runtime_suspend = rfbi_runtime_suspend,
1057         .runtime_resume = rfbi_runtime_resume,
1058 };
1059
1060 static struct platform_driver omap_rfbihw_driver = {
1061         .probe          = rfbi_probe,
1062         .remove         = rfbi_remove,
1063         .driver         = {
1064                 .name   = "omapdss_rfbi",
1065                 .pm     = &rfbi_pm_ops,
1066                 .suppress_bind_attrs = true,
1067         },
1068 };
1069
1070 int __init rfbi_init_platform_driver(void)
1071 {
1072         return platform_driver_register(&omap_rfbihw_driver);
1073 }
1074
1075 void rfbi_uninit_platform_driver(void)
1076 {
1077         platform_driver_unregister(&omap_rfbihw_driver);
1078 }