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/omapfb_dss.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
rfbi_write_reg(const struct rfbi_reg idx,u32 val)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
rfbi_read_reg(const struct rfbi_reg idx)129 static inline u32 rfbi_read_reg(const struct rfbi_reg idx)
130 {
131 return __raw_readl(rfbi.base + idx.idx);
132 }
133
rfbi_runtime_get(void)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
rfbi_runtime_put(void)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
rfbi_bus_lock(void)155 static void rfbi_bus_lock(void)
156 {
157 down(&rfbi.bus_lock);
158 }
159
rfbi_bus_unlock(void)160 static void rfbi_bus_unlock(void)
161 {
162 up(&rfbi.bus_lock);
163 }
164
rfbi_write_command(const void * buf,u32 len)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
rfbi_read_data(void * buf,u32 len)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
rfbi_write_data(const void * buf,u32 len)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
rfbi_write_pixels(const void __iomem * buf,int scr_width,u16 x,u16 y,u16 w,u16 h)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
rfbi_transfer_area(struct omap_dss_device * dssdev,void (* callback)(void * data),void * data)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
framedone_callback(void * data)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 */
rfbi_print_timings(void)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
rfbi_print_timings(void)380 static void rfbi_print_timings(void) {}
381 #endif
382
383
384
385
386 static u32 extif_clk_period;
387
round_to_extif_ticks(unsigned long ps,int div)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
calc_reg_timing(struct rfbi_timings * t,int div)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
calc_extif_timings(struct rfbi_timings * t)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
rfbi_set_timings(int rfbi_module,struct rfbi_timings * t)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
ps_to_rfbi_ticks(int time,int div)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
rfbi_get_clk_info(u32 * clk_period,u32 * max_clk_div)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
rfbi_convert_timings(struct rfbi_timings * t)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 */
rfbi_setup_te(enum omap_rfbi_te_mode mode,unsigned hs_pulse_time,unsigned vs_pulse_time,int hs_pol_inv,int vs_pol_inv,int extif_div)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 */
rfbi_enable_te(bool enable,unsigned line)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
rfbi_configure_bus(int rfbi_module,int bpp,int lines)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
rfbi_configure(struct omap_dss_device * dssdev)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
rfbi_update(struct omap_dss_device * dssdev,void (* callback)(void *),void * data)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
rfbi_set_size(struct omap_dss_device * dssdev,u16 w,u16 h)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
rfbi_set_pixel_size(struct omap_dss_device * dssdev,int pixel_size)784 static void rfbi_set_pixel_size(struct omap_dss_device *dssdev, int pixel_size)
785 {
786 rfbi.pixel_size = pixel_size;
787 }
788
rfbi_set_data_lines(struct omap_dss_device * dssdev,int data_lines)789 static void rfbi_set_data_lines(struct omap_dss_device *dssdev, int data_lines)
790 {
791 rfbi.data_lines = data_lines;
792 }
793
rfbi_set_interface_timings(struct omap_dss_device * dssdev,struct rfbi_timings * timings)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
rfbi_dump_regs(struct seq_file * s)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
rfbi_config_lcd_manager(struct omap_dss_device * dssdev)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
rfbi_display_enable(struct omap_dss_device * dssdev)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->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
rfbi_display_disable(struct omap_dss_device * dssdev)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
rfbi_init_display(struct omap_dss_device * dssdev)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
rfbi_init_output(struct platform_device * pdev)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
rfbi_uninit_output(struct platform_device * pdev)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 */
rfbi_bind(struct device * dev,struct device * master,void * data)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
rfbi_unbind(struct device * dev,struct device * master,void * data)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
rfbi_probe(struct platform_device * pdev)1026 static int rfbi_probe(struct platform_device *pdev)
1027 {
1028 return component_add(&pdev->dev, &rfbi_component_ops);
1029 }
1030
rfbi_remove(struct platform_device * pdev)1031 static int rfbi_remove(struct platform_device *pdev)
1032 {
1033 component_del(&pdev->dev, &rfbi_component_ops);
1034 return 0;
1035 }
1036
rfbi_runtime_suspend(struct device * dev)1037 static int rfbi_runtime_suspend(struct device *dev)
1038 {
1039 dispc_runtime_put();
1040
1041 return 0;
1042 }
1043
rfbi_runtime_resume(struct device * dev)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
rfbi_init_platform_driver(void)1070 int __init rfbi_init_platform_driver(void)
1071 {
1072 return platform_driver_register(&omap_rfbihw_driver);
1073 }
1074
rfbi_uninit_platform_driver(void)1075 void rfbi_uninit_platform_driver(void)
1076 {
1077 platform_driver_unregister(&omap_rfbihw_driver);
1078 }
1079
