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ARM: LPC32xx: clock.c: jiffies wrapping
[linux-2.6.git] / drivers / video / sh_mobile_lcdcfb.c
blobaac5b369d73cb3acf8b33e9ab1acedebf14c45ac
1 /*
2 * SuperH Mobile LCDC Framebuffer
3 *
4 * Copyright (c) 2008 Magnus Damm
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file "COPYING" in the main directory of this archive
8 * for more details.
9 */
10
11 #include <linux/kernel.h>
12 #include <linux/init.h>
13 #include <linux/delay.h>
14 #include <linux/mm.h>
15 #include <linux/clk.h>
16 #include <linux/pm_runtime.h>
17 #include <linux/platform_device.h>
18 #include <linux/dma-mapping.h>
19 #include <linux/interrupt.h>
20 #include <linux/videodev2.h>
21 #include <linux/vmalloc.h>
22 #include <linux/ioctl.h>
23 #include <linux/slab.h>
24 #include <linux/console.h>
25 #include <linux/backlight.h>
26 #include <linux/gpio.h>
27 #include <linux/module.h>
28 #include <video/sh_mobile_lcdc.h>
29 #include <video/sh_mobile_meram.h>
30 #include <linux/atomic.h>
31
32 #include "sh_mobile_lcdcfb.h"
33
34 #define SIDE_B_OFFSET 0x1000
35 #define MIRROR_OFFSET 0x2000
36
37 #define MAX_XRES 1920
38 #define MAX_YRES 1080
39
40 static unsigned long lcdc_offs_mainlcd[NR_CH_REGS] = {
41 [LDDCKPAT1R] = 0x400,
42 [LDDCKPAT2R] = 0x404,
43 [LDMT1R] = 0x418,
44 [LDMT2R] = 0x41c,
45 [LDMT3R] = 0x420,
46 [LDDFR] = 0x424,
47 [LDSM1R] = 0x428,
48 [LDSM2R] = 0x42c,
49 [LDSA1R] = 0x430,
50 [LDSA2R] = 0x434,
51 [LDMLSR] = 0x438,
52 [LDHCNR] = 0x448,
53 [LDHSYNR] = 0x44c,
54 [LDVLNR] = 0x450,
55 [LDVSYNR] = 0x454,
56 [LDPMR] = 0x460,
57 [LDHAJR] = 0x4a0,
58 };
59
60 static unsigned long lcdc_offs_sublcd[NR_CH_REGS] = {
61 [LDDCKPAT1R] = 0x408,
62 [LDDCKPAT2R] = 0x40c,
63 [LDMT1R] = 0x600,
64 [LDMT2R] = 0x604,
65 [LDMT3R] = 0x608,
66 [LDDFR] = 0x60c,
67 [LDSM1R] = 0x610,
68 [LDSM2R] = 0x614,
69 [LDSA1R] = 0x618,
70 [LDMLSR] = 0x620,
71 [LDHCNR] = 0x624,
72 [LDHSYNR] = 0x628,
73 [LDVLNR] = 0x62c,
74 [LDVSYNR] = 0x630,
75 [LDPMR] = 0x63c,
76 };
77
78 static const struct fb_videomode default_720p = {
79 .name = "HDMI 720p",
80 .xres = 1280,
81 .yres = 720,
82
83 .left_margin = 220,
84 .right_margin = 110,
85 .hsync_len = 40,
86
87 .upper_margin = 20,
88 .lower_margin = 5,
89 .vsync_len = 5,
90
91 .pixclock = 13468,
92 .refresh = 60,
93 .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT,
94 };
95
96 struct sh_mobile_lcdc_priv {
97 void __iomem *base;
98 int irq;
99 atomic_t hw_usecnt;
100 struct device *dev;
101 struct clk *dot_clk;
102 unsigned long lddckr;
103 struct sh_mobile_lcdc_chan ch[2];
104 struct notifier_block notifier;
105 int started;
106 int forced_fourcc; /* 2 channel LCDC must share fourcc setting */
107 struct sh_mobile_meram_info *meram_dev;
108 };
109
110 static bool banked(int reg_nr)
111 {
112 switch (reg_nr) {
113 case LDMT1R:
114 case LDMT2R:
115 case LDMT3R:
116 case LDDFR:
117 case LDSM1R:
118 case LDSA1R:
119 case LDSA2R:
120 case LDMLSR:
121 case LDHCNR:
122 case LDHSYNR:
123 case LDVLNR:
124 case LDVSYNR:
125 return true;
126 }
127 return false;
128 }
129
130 static void lcdc_write_chan(struct sh_mobile_lcdc_chan *chan,
131 int reg_nr, unsigned long data)
132 {
133 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr]);
134 if (banked(reg_nr))
135 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
136 SIDE_B_OFFSET);
137 }
138
139 static void lcdc_write_chan_mirror(struct sh_mobile_lcdc_chan *chan,
140 int reg_nr, unsigned long data)
141 {
142 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
143 MIRROR_OFFSET);
144 }
145
146 static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan *chan,
147 int reg_nr)
148 {
149 return ioread32(chan->lcdc->base + chan->reg_offs[reg_nr]);
150 }
151
152 static void lcdc_write(struct sh_mobile_lcdc_priv *priv,
153 unsigned long reg_offs, unsigned long data)
154 {
155 iowrite32(data, priv->base + reg_offs);
156 }
157
158 static unsigned long lcdc_read(struct sh_mobile_lcdc_priv *priv,
159 unsigned long reg_offs)
160 {
161 return ioread32(priv->base + reg_offs);
162 }
163
164 static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv,
165 unsigned long reg_offs,
166 unsigned long mask, unsigned long until)
167 {
168 while ((lcdc_read(priv, reg_offs) & mask) != until)
169 cpu_relax();
170 }
171
172 static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan)
173 {
174 return chan->cfg.chan == LCDC_CHAN_SUBLCD;
175 }
176
177 static void lcdc_sys_write_index(void *handle, unsigned long data)
178 {
179 struct sh_mobile_lcdc_chan *ch = handle;
180
181 lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT);
182 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
183 lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
184 (lcdc_chan_is_sublcd(ch) ? 2 : 0));
185 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
186 }
187
188 static void lcdc_sys_write_data(void *handle, unsigned long data)
189 {
190 struct sh_mobile_lcdc_chan *ch = handle;
191
192 lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT | LDDWDxR_RSW);
193 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
194 lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
195 (lcdc_chan_is_sublcd(ch) ? 2 : 0));
196 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
197 }
198
199 static unsigned long lcdc_sys_read_data(void *handle)
200 {
201 struct sh_mobile_lcdc_chan *ch = handle;
202
203 lcdc_write(ch->lcdc, _LDDRDR, LDDRDR_RSR);
204 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
205 lcdc_write(ch->lcdc, _LDDRAR, LDDRAR_RA |
206 (lcdc_chan_is_sublcd(ch) ? 2 : 0));
207 udelay(1);
208 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
209
210 return lcdc_read(ch->lcdc, _LDDRDR) & LDDRDR_DRD_MASK;
211 }
212
213 struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = {
214 lcdc_sys_write_index,
215 lcdc_sys_write_data,
216 lcdc_sys_read_data,
217 };
218
219 static int sh_mobile_format_fourcc(const struct fb_var_screeninfo *var)
220 {
221 if (var->grayscale > 1)
222 return var->grayscale;
223
224 switch (var->bits_per_pixel) {
225 case 16:
226 return V4L2_PIX_FMT_RGB565;
227 case 24:
228 return V4L2_PIX_FMT_BGR24;
229 case 32:
230 return V4L2_PIX_FMT_BGR32;
231 default:
232 return 0;
233 }
234 }
235
236 static int sh_mobile_format_is_fourcc(const struct fb_var_screeninfo *var)
237 {
238 return var->grayscale > 1;
239 }
240
241 static bool sh_mobile_format_is_yuv(const struct fb_var_screeninfo *var)
242 {
243 if (var->grayscale <= 1)
244 return false;
245
246 switch (var->grayscale) {
247 case V4L2_PIX_FMT_NV12:
248 case V4L2_PIX_FMT_NV21:
249 case V4L2_PIX_FMT_NV16:
250 case V4L2_PIX_FMT_NV61:
251 case V4L2_PIX_FMT_NV24:
252 case V4L2_PIX_FMT_NV42:
253 return true;
254
255 default:
256 return false;
257 }
258 }
259
260 static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv)
261 {
262 if (atomic_inc_and_test(&priv->hw_usecnt)) {
263 if (priv->dot_clk)
264 clk_enable(priv->dot_clk);
265 pm_runtime_get_sync(priv->dev);
266 if (priv->meram_dev && priv->meram_dev->pdev)
267 pm_runtime_get_sync(&priv->meram_dev->pdev->dev);
268 }
269 }
270
271 static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv)
272 {
273 if (atomic_sub_return(1, &priv->hw_usecnt) == -1) {
274 if (priv->meram_dev && priv->meram_dev->pdev)
275 pm_runtime_put_sync(&priv->meram_dev->pdev->dev);
276 pm_runtime_put(priv->dev);
277 if (priv->dot_clk)
278 clk_disable(priv->dot_clk);
279 }
280 }
281
282 static int sh_mobile_lcdc_sginit(struct fb_info *info,
283 struct list_head *pagelist)
284 {
285 struct sh_mobile_lcdc_chan *ch = info->par;
286 unsigned int nr_pages_max = info->fix.smem_len >> PAGE_SHIFT;
287 struct page *page;
288 int nr_pages = 0;
289
290 sg_init_table(ch->sglist, nr_pages_max);
291
292 list_for_each_entry(page, pagelist, lru)
293 sg_set_page(&ch->sglist[nr_pages++], page, PAGE_SIZE, 0);
294
295 return nr_pages;
296 }
297
298 static void sh_mobile_lcdc_deferred_io(struct fb_info *info,
299 struct list_head *pagelist)
300 {
301 struct sh_mobile_lcdc_chan *ch = info->par;
302 struct sh_mobile_lcdc_board_cfg *bcfg = &ch->cfg.board_cfg;
303
304 /* enable clocks before accessing hardware */
305 sh_mobile_lcdc_clk_on(ch->lcdc);
306
307 /*
308 * It's possible to get here without anything on the pagelist via
309 * sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync()
310 * invocation. In the former case, the acceleration routines are
311 * stepped in to when using the framebuffer console causing the
312 * workqueue to be scheduled without any dirty pages on the list.
313 *
314 * Despite this, a panel update is still needed given that the
315 * acceleration routines have their own methods for writing in
316 * that still need to be updated.
317 *
318 * The fsync() and empty pagelist case could be optimized for,
319 * but we don't bother, as any application exhibiting such
320 * behaviour is fundamentally broken anyways.
321 */
322 if (!list_empty(pagelist)) {
323 unsigned int nr_pages = sh_mobile_lcdc_sginit(info, pagelist);
324
325 /* trigger panel update */
326 dma_map_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
327 if (bcfg->start_transfer)
328 bcfg->start_transfer(bcfg->board_data, ch,
329 &sh_mobile_lcdc_sys_bus_ops);
330 lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
331 dma_unmap_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
332 } else {
333 if (bcfg->start_transfer)
334 bcfg->start_transfer(bcfg->board_data, ch,
335 &sh_mobile_lcdc_sys_bus_ops);
336 lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
337 }
338 }
339
340 static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info)
341 {
342 struct fb_deferred_io *fbdefio = info->fbdefio;
343
344 if (fbdefio)
345 schedule_delayed_work(&info->deferred_work, fbdefio->delay);
346 }
347
348 static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
349 {
350 struct sh_mobile_lcdc_priv *priv = data;
351 struct sh_mobile_lcdc_chan *ch;
352 unsigned long ldintr;
353 int is_sub;
354 int k;
355
356 /* Acknowledge interrupts and disable further VSYNC End IRQs. */
357 ldintr = lcdc_read(priv, _LDINTR);
358 lcdc_write(priv, _LDINTR, (ldintr ^ LDINTR_STATUS_MASK) & ~LDINTR_VEE);
359
360 /* figure out if this interrupt is for main or sub lcd */
361 is_sub = (lcdc_read(priv, _LDSR) & LDSR_MSS) ? 1 : 0;
362
363 /* wake up channel and disable clocks */
364 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
365 ch = &priv->ch[k];
366
367 if (!ch->enabled)
368 continue;
369
370 /* Frame End */
371 if (ldintr & LDINTR_FS) {
372 if (is_sub == lcdc_chan_is_sublcd(ch)) {
373 ch->frame_end = 1;
374 wake_up(&ch->frame_end_wait);
375
376 sh_mobile_lcdc_clk_off(priv);
377 }
378 }
379
380 /* VSYNC End */
381 if (ldintr & LDINTR_VES)
382 complete(&ch->vsync_completion);
383 }
384
385 return IRQ_HANDLED;
386 }
387
388 static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv,
389 int start)
390 {
391 unsigned long tmp = lcdc_read(priv, _LDCNT2R);
392 int k;
393
394 /* start or stop the lcdc */
395 if (start)
396 lcdc_write(priv, _LDCNT2R, tmp | LDCNT2R_DO);
397 else
398 lcdc_write(priv, _LDCNT2R, tmp & ~LDCNT2R_DO);
399
400 /* wait until power is applied/stopped on all channels */
401 for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
402 if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled)
403 while (1) {
404 tmp = lcdc_read_chan(&priv->ch[k], LDPMR)
405 & LDPMR_LPS;
406 if (start && tmp == LDPMR_LPS)
407 break;
408 if (!start && tmp == 0)
409 break;
410 cpu_relax();
411 }
412
413 if (!start)
414 lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */
415 }
416
417 static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch)
418 {
419 struct fb_var_screeninfo *var = &ch->info->var, *display_var = &ch->display_var;
420 unsigned long h_total, hsync_pos, display_h_total;
421 u32 tmp;
422
423 tmp = ch->ldmt1r_value;
424 tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : LDMT1R_VPOL;
425 tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : LDMT1R_HPOL;
426 tmp |= (ch->cfg.flags & LCDC_FLAGS_DWPOL) ? LDMT1R_DWPOL : 0;
427 tmp |= (ch->cfg.flags & LCDC_FLAGS_DIPOL) ? LDMT1R_DIPOL : 0;
428 tmp |= (ch->cfg.flags & LCDC_FLAGS_DAPOL) ? LDMT1R_DAPOL : 0;
429 tmp |= (ch->cfg.flags & LCDC_FLAGS_HSCNT) ? LDMT1R_HSCNT : 0;
430 tmp |= (ch->cfg.flags & LCDC_FLAGS_DWCNT) ? LDMT1R_DWCNT : 0;
431 lcdc_write_chan(ch, LDMT1R, tmp);
432
433 /* setup SYS bus */
434 lcdc_write_chan(ch, LDMT2R, ch->cfg.sys_bus_cfg.ldmt2r);
435 lcdc_write_chan(ch, LDMT3R, ch->cfg.sys_bus_cfg.ldmt3r);
436
437 /* horizontal configuration */
438 h_total = display_var->xres + display_var->hsync_len +
439 display_var->left_margin + display_var->right_margin;
440 tmp = h_total / 8; /* HTCN */
441 tmp |= (min(display_var->xres, var->xres) / 8) << 16; /* HDCN */
442 lcdc_write_chan(ch, LDHCNR, tmp);
443
444 hsync_pos = display_var->xres + display_var->right_margin;
445 tmp = hsync_pos / 8; /* HSYNP */
446 tmp |= (display_var->hsync_len / 8) << 16; /* HSYNW */
447 lcdc_write_chan(ch, LDHSYNR, tmp);
448
449 /* vertical configuration */
450 tmp = display_var->yres + display_var->vsync_len +
451 display_var->upper_margin + display_var->lower_margin; /* VTLN */
452 tmp |= min(display_var->yres, var->yres) << 16; /* VDLN */
453 lcdc_write_chan(ch, LDVLNR, tmp);
454
455 tmp = display_var->yres + display_var->lower_margin; /* VSYNP */
456 tmp |= display_var->vsync_len << 16; /* VSYNW */
457 lcdc_write_chan(ch, LDVSYNR, tmp);
458
459 /* Adjust horizontal synchronisation for HDMI */
460 display_h_total = display_var->xres + display_var->hsync_len +
461 display_var->left_margin + display_var->right_margin;
462 tmp = ((display_var->xres & 7) << 24) |
463 ((display_h_total & 7) << 16) |
464 ((display_var->hsync_len & 7) << 8) |
465 (hsync_pos & 7);
466 lcdc_write_chan(ch, LDHAJR, tmp);
467 }
468
469 /*
470 * __sh_mobile_lcdc_start - Configure and tart the LCDC
471 * @priv: LCDC device
472 *
473 * Configure all enabled channels and start the LCDC device. All external
474 * devices (clocks, MERAM, panels, ...) are not touched by this function.
475 */
476 static void __sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
477 {
478 struct sh_mobile_lcdc_chan *ch;
479 unsigned long tmp;
480 int k, m;
481
482 /* Enable LCDC channels. Read data from external memory, avoid using the
483 * BEU for now.
484 */
485 lcdc_write(priv, _LDCNT2R, priv->ch[0].enabled | priv->ch[1].enabled);
486
487 /* Stop the LCDC first and disable all interrupts. */
488 sh_mobile_lcdc_start_stop(priv, 0);
489 lcdc_write(priv, _LDINTR, 0);
490
491 /* Configure power supply, dot clocks and start them. */
492 tmp = priv->lddckr;
493 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
494 ch = &priv->ch[k];
495 if (!ch->enabled)
496 continue;
497
498 /* Power supply */
499 lcdc_write_chan(ch, LDPMR, 0);
500
501 m = ch->cfg.clock_divider;
502 if (!m)
503 continue;
504
505 /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider
506 * denominator.
507 */
508 lcdc_write_chan(ch, LDDCKPAT1R, 0);
509 lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1);
510
511 if (m == 1)
512 m = LDDCKR_MOSEL;
513 tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
514 }
515
516 lcdc_write(priv, _LDDCKR, tmp);
517 lcdc_write(priv, _LDDCKSTPR, 0);
518 lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0);
519
520 /* Setup geometry, format, frame buffer memory and operation mode. */
521 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
522 ch = &priv->ch[k];
523 if (!ch->enabled)
524 continue;
525
526 sh_mobile_lcdc_geometry(ch);
527
528 switch (sh_mobile_format_fourcc(&ch->info->var)) {
529 case V4L2_PIX_FMT_RGB565:
530 tmp = LDDFR_PKF_RGB16;
531 break;
532 case V4L2_PIX_FMT_BGR24:
533 tmp = LDDFR_PKF_RGB24;
534 break;
535 case V4L2_PIX_FMT_BGR32:
536 tmp = LDDFR_PKF_ARGB32;
537 break;
538 case V4L2_PIX_FMT_NV12:
539 case V4L2_PIX_FMT_NV21:
540 tmp = LDDFR_CC | LDDFR_YF_420;
541 break;
542 case V4L2_PIX_FMT_NV16:
543 case V4L2_PIX_FMT_NV61:
544 tmp = LDDFR_CC | LDDFR_YF_422;
545 break;
546 case V4L2_PIX_FMT_NV24:
547 case V4L2_PIX_FMT_NV42:
548 tmp = LDDFR_CC | LDDFR_YF_444;
549 break;
550 }
551
552 if (sh_mobile_format_is_yuv(&ch->info->var)) {
553 switch (ch->info->var.colorspace) {
554 case V4L2_COLORSPACE_REC709:
555 tmp |= LDDFR_CF1;
556 break;
557 case V4L2_COLORSPACE_JPEG:
558 tmp |= LDDFR_CF0;
559 break;
560 }
561 }
562
563 lcdc_write_chan(ch, LDDFR, tmp);
564 lcdc_write_chan(ch, LDMLSR, ch->pitch);
565 lcdc_write_chan(ch, LDSA1R, ch->base_addr_y);
566 if (sh_mobile_format_is_yuv(&ch->info->var))
567 lcdc_write_chan(ch, LDSA2R, ch->base_addr_c);
568
569 /* When using deferred I/O mode, configure the LCDC for one-shot
570 * operation and enable the frame end interrupt. Otherwise use
571 * continuous read mode.
572 */
573 if (ch->ldmt1r_value & LDMT1R_IFM &&
574 ch->cfg.sys_bus_cfg.deferred_io_msec) {
575 lcdc_write_chan(ch, LDSM1R, LDSM1R_OS);
576 lcdc_write(priv, _LDINTR, LDINTR_FE);
577 } else {
578 lcdc_write_chan(ch, LDSM1R, 0);
579 }
580 }
581
582 /* Word and long word swap. */
583 switch (sh_mobile_format_fourcc(&priv->ch[0].info->var)) {
584 case V4L2_PIX_FMT_RGB565:
585 case V4L2_PIX_FMT_NV21:
586 case V4L2_PIX_FMT_NV61:
587 case V4L2_PIX_FMT_NV42:
588 tmp = LDDDSR_LS | LDDDSR_WS;
589 break;
590 case V4L2_PIX_FMT_BGR24:
591 case V4L2_PIX_FMT_NV12:
592 case V4L2_PIX_FMT_NV16:
593 case V4L2_PIX_FMT_NV24:
594 tmp = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
595 break;
596 case V4L2_PIX_FMT_BGR32:
597 default:
598 tmp = LDDDSR_LS;
599 break;
600 }
601 lcdc_write(priv, _LDDDSR, tmp);
602
603 /* Enable the display output. */
604 lcdc_write(priv, _LDCNT1R, LDCNT1R_DE);
605 sh_mobile_lcdc_start_stop(priv, 1);
606 priv->started = 1;
607 }
608
609 static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
610 {
611 struct sh_mobile_meram_info *mdev = priv->meram_dev;
612 struct sh_mobile_lcdc_board_cfg *board_cfg;
613 struct sh_mobile_lcdc_chan *ch;
614 unsigned long tmp;
615 int ret;
616 int k;
617
618 /* enable clocks before accessing the hardware */
619 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
620 if (priv->ch[k].enabled)
621 sh_mobile_lcdc_clk_on(priv);
622 }
623
624 /* reset */
625 lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LDCNT2R_BR);
626 lcdc_wait_bit(priv, _LDCNT2R, LDCNT2R_BR, 0);
627
628 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
629 ch = &priv->ch[k];
630
631 if (!ch->enabled)
632 continue;
633
634 board_cfg = &ch->cfg.board_cfg;
635 if (board_cfg->setup_sys) {
636 ret = board_cfg->setup_sys(board_cfg->board_data, ch,
637 &sh_mobile_lcdc_sys_bus_ops);
638 if (ret)
639 return ret;
640 }
641 }
642
643 /* Compute frame buffer base address and pitch for each channel. */
644 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
645 struct sh_mobile_meram_cfg *cfg;
646 int pixelformat;
647
648 ch = &priv->ch[k];
649 if (!ch->enabled)
650 continue;
651
652 ch->base_addr_y = ch->info->fix.smem_start;
653 ch->base_addr_c = ch->base_addr_y
654 + ch->info->var.xres
655 * ch->info->var.yres_virtual;
656 ch->pitch = ch->info->fix.line_length;
657
658 /* Enable MERAM if possible. */
659 cfg = ch->cfg.meram_cfg;
660 if (mdev == NULL || mdev->ops == NULL || cfg == NULL)
661 continue;
662
663 /* we need to de-init configured ICBs before we can
664 * re-initialize them.
665 */
666 if (ch->meram_enabled) {
667 mdev->ops->meram_unregister(mdev, cfg);
668 ch->meram_enabled = 0;
669 }
670
671 switch (sh_mobile_format_fourcc(&ch->info->var)) {
672 case V4L2_PIX_FMT_NV12:
673 case V4L2_PIX_FMT_NV21:
674 case V4L2_PIX_FMT_NV16:
675 case V4L2_PIX_FMT_NV61:
676 pixelformat = SH_MOBILE_MERAM_PF_NV;
677 break;
678 case V4L2_PIX_FMT_NV24:
679 case V4L2_PIX_FMT_NV42:
680 pixelformat = SH_MOBILE_MERAM_PF_NV24;
681 break;
682 case V4L2_PIX_FMT_RGB565:
683 case V4L2_PIX_FMT_BGR24:
684 case V4L2_PIX_FMT_BGR32:
685 default:
686 pixelformat = SH_MOBILE_MERAM_PF_RGB;
687 break;
688 }
689
690 ret = mdev->ops->meram_register(mdev, cfg, ch->pitch,
691 ch->info->var.yres, pixelformat,
692 ch->base_addr_y, ch->base_addr_c,
693 &ch->base_addr_y, &ch->base_addr_c,
694 &ch->pitch);
695 if (!ret)
696 ch->meram_enabled = 1;
697 }
698
699 /* Start the LCDC. */
700 __sh_mobile_lcdc_start(priv);
701
702 /* Setup deferred I/O, tell the board code to enable the panels, and
703 * turn backlight on.
704 */
705 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
706 ch = &priv->ch[k];
707 if (!ch->enabled)
708 continue;
709
710 tmp = ch->cfg.sys_bus_cfg.deferred_io_msec;
711 if (ch->ldmt1r_value & LDMT1R_IFM && tmp) {
712 ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
713 ch->defio.delay = msecs_to_jiffies(tmp);
714 ch->info->fbdefio = &ch->defio;
715 fb_deferred_io_init(ch->info);
716 }
717
718 board_cfg = &ch->cfg.board_cfg;
719 if (board_cfg->display_on && try_module_get(board_cfg->owner)) {
720 board_cfg->display_on(board_cfg->board_data, ch->info);
721 module_put(board_cfg->owner);
722 }
723
724 if (ch->bl) {
725 ch->bl->props.power = FB_BLANK_UNBLANK;
726 backlight_update_status(ch->bl);
727 }
728 }
729
730 return 0;
731 }
732
733 static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
734 {
735 struct sh_mobile_lcdc_chan *ch;
736 struct sh_mobile_lcdc_board_cfg *board_cfg;
737 int k;
738
739 /* clean up deferred io and ask board code to disable panel */
740 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
741 ch = &priv->ch[k];
742 if (!ch->enabled)
743 continue;
744
745 /* deferred io mode:
746 * flush frame, and wait for frame end interrupt
747 * clean up deferred io and enable clock
748 */
749 if (ch->info && ch->info->fbdefio) {
750 ch->frame_end = 0;
751 schedule_delayed_work(&ch->info->deferred_work, 0);
752 wait_event(ch->frame_end_wait, ch->frame_end);
753 fb_deferred_io_cleanup(ch->info);
754 ch->info->fbdefio = NULL;
755 sh_mobile_lcdc_clk_on(priv);
756 }
757
758 if (ch->bl) {
759 ch->bl->props.power = FB_BLANK_POWERDOWN;
760 backlight_update_status(ch->bl);
761 }
762
763 board_cfg = &ch->cfg.board_cfg;
764 if (board_cfg->display_off && try_module_get(board_cfg->owner)) {
765 board_cfg->display_off(board_cfg->board_data);
766 module_put(board_cfg->owner);
767 }
768
769 /* disable the meram */
770 if (ch->meram_enabled) {
771 struct sh_mobile_meram_cfg *cfg;
772 struct sh_mobile_meram_info *mdev;
773 cfg = ch->cfg.meram_cfg;
774 mdev = priv->meram_dev;
775 mdev->ops->meram_unregister(mdev, cfg);
776 ch->meram_enabled = 0;
777 }
778
779 }
780
781 /* stop the lcdc */
782 if (priv->started) {
783 sh_mobile_lcdc_start_stop(priv, 0);
784 priv->started = 0;
785 }
786
787 /* stop clocks */
788 for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
789 if (priv->ch[k].enabled)
790 sh_mobile_lcdc_clk_off(priv);
791 }
792
793 static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
794 {
795 int interface_type = ch->cfg.interface_type;
796
797 switch (interface_type) {
798 case RGB8:
799 case RGB9:
800 case RGB12A:
801 case RGB12B:
802 case RGB16:
803 case RGB18:
804 case RGB24:
805 case SYS8A:
806 case SYS8B:
807 case SYS8C:
808 case SYS8D:
809 case SYS9:
810 case SYS12:
811 case SYS16A:
812 case SYS16B:
813 case SYS16C:
814 case SYS18:
815 case SYS24:
816 break;
817 default:
818 return -EINVAL;
819 }
820
821 /* SUBLCD only supports SYS interface */
822 if (lcdc_chan_is_sublcd(ch)) {
823 if (!(interface_type & LDMT1R_IFM))
824 return -EINVAL;
825
826 interface_type &= ~LDMT1R_IFM;
827 }
828
829 ch->ldmt1r_value = interface_type;
830 return 0;
831 }
832
833 static int sh_mobile_lcdc_setup_clocks(struct platform_device *pdev,
834 int clock_source,
835 struct sh_mobile_lcdc_priv *priv)
836 {
837 char *str;
838
839 switch (clock_source) {
840 case LCDC_CLK_BUS:
841 str = "bus_clk";
842 priv->lddckr = LDDCKR_ICKSEL_BUS;
843 break;
844 case LCDC_CLK_PERIPHERAL:
845 str = "peripheral_clk";
846 priv->lddckr = LDDCKR_ICKSEL_MIPI;
847 break;
848 case LCDC_CLK_EXTERNAL:
849 str = NULL;
850 priv->lddckr = LDDCKR_ICKSEL_HDMI;
851 break;
852 default:
853 return -EINVAL;
854 }
855
856 if (str) {
857 priv->dot_clk = clk_get(&pdev->dev, str);
858 if (IS_ERR(priv->dot_clk)) {
859 dev_err(&pdev->dev, "cannot get dot clock %s\n", str);
860 return PTR_ERR(priv->dot_clk);
861 }
862 }
863
864 /* Runtime PM support involves two step for this driver:
865 * 1) Enable Runtime PM
866 * 2) Force Runtime PM Resume since hardware is accessed from probe()
867 */
868 priv->dev = &pdev->dev;
869 pm_runtime_enable(priv->dev);
870 pm_runtime_resume(priv->dev);
871 return 0;
872 }
873
874 static int sh_mobile_lcdc_setcolreg(u_int regno,
875 u_int red, u_int green, u_int blue,
876 u_int transp, struct fb_info *info)
877 {
878 u32 *palette = info->pseudo_palette;
879
880 if (regno >= PALETTE_NR)
881 return -EINVAL;
882
883 /* only FB_VISUAL_TRUECOLOR supported */
884
885 red >>= 16 - info->var.red.length;
886 green >>= 16 - info->var.green.length;
887 blue >>= 16 - info->var.blue.length;
888 transp >>= 16 - info->var.transp.length;
889
890 palette[regno] = (red << info->var.red.offset) |
891 (green << info->var.green.offset) |
892 (blue << info->var.blue.offset) |
893 (transp << info->var.transp.offset);
894
895 return 0;
896 }
897
898 static struct fb_fix_screeninfo sh_mobile_lcdc_fix = {
899 .id = "SH Mobile LCDC",
900 .type = FB_TYPE_PACKED_PIXELS,
901 .visual = FB_VISUAL_TRUECOLOR,
902 .accel = FB_ACCEL_NONE,
903 .xpanstep = 0,
904 .ypanstep = 1,
905 .ywrapstep = 0,
906 .capabilities = FB_CAP_FOURCC,
907 };
908
909 static void sh_mobile_lcdc_fillrect(struct fb_info *info,
910 const struct fb_fillrect *rect)
911 {
912 sys_fillrect(info, rect);
913 sh_mobile_lcdc_deferred_io_touch(info);
914 }
915
916 static void sh_mobile_lcdc_copyarea(struct fb_info *info,
917 const struct fb_copyarea *area)
918 {
919 sys_copyarea(info, area);
920 sh_mobile_lcdc_deferred_io_touch(info);
921 }
922
923 static void sh_mobile_lcdc_imageblit(struct fb_info *info,
924 const struct fb_image *image)
925 {
926 sys_imageblit(info, image);
927 sh_mobile_lcdc_deferred_io_touch(info);
928 }
929
930 static int sh_mobile_fb_pan_display(struct fb_var_screeninfo *var,
931 struct fb_info *info)
932 {
933 struct sh_mobile_lcdc_chan *ch = info->par;
934 struct sh_mobile_lcdc_priv *priv = ch->lcdc;
935 unsigned long ldrcntr;
936 unsigned long new_pan_offset;
937 unsigned long base_addr_y, base_addr_c;
938 unsigned long c_offset;
939 bool yuv = sh_mobile_format_is_yuv(&info->var);
940
941 if (!yuv)
942 new_pan_offset = var->yoffset * info->fix.line_length
943 + var->xoffset * (info->var.bits_per_pixel / 8);
944 else
945 new_pan_offset = var->yoffset * info->fix.line_length
946 + var->xoffset;
947
948 if (new_pan_offset == ch->pan_offset)
949 return 0; /* No change, do nothing */
950
951 ldrcntr = lcdc_read(priv, _LDRCNTR);
952
953 /* Set the source address for the next refresh */
954 base_addr_y = ch->dma_handle + new_pan_offset;
955 if (yuv) {
956 /* Set y offset */
957 c_offset = var->yoffset * info->fix.line_length
958 * (info->var.bits_per_pixel - 8) / 8;
959 base_addr_c = ch->dma_handle
960 + info->var.xres * info->var.yres_virtual
961 + c_offset;
962 /* Set x offset */
963 if (sh_mobile_format_fourcc(&info->var) == V4L2_PIX_FMT_NV24)
964 base_addr_c += 2 * var->xoffset;
965 else
966 base_addr_c += var->xoffset;
967 }
968
969 if (ch->meram_enabled) {
970 struct sh_mobile_meram_cfg *cfg;
971 struct sh_mobile_meram_info *mdev;
972 int ret;
973
974 cfg = ch->cfg.meram_cfg;
975 mdev = priv->meram_dev;
976 ret = mdev->ops->meram_update(mdev, cfg,
977 base_addr_y, base_addr_c,
978 &base_addr_y, &base_addr_c);
979 if (ret)
980 return ret;
981 }
982
983 ch->base_addr_y = base_addr_y;
984 ch->base_addr_c = base_addr_c;
985
986 lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y);
987 if (yuv)
988 lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c);
989
990 if (lcdc_chan_is_sublcd(ch))
991 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
992 else
993 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS);
994
995 ch->pan_offset = new_pan_offset;
996
997 sh_mobile_lcdc_deferred_io_touch(info);
998
999 return 0;
1000 }
1001
1002 static int sh_mobile_wait_for_vsync(struct fb_info *info)
1003 {
1004 struct sh_mobile_lcdc_chan *ch = info->par;
1005 unsigned long ldintr;
1006 int ret;
1007
1008 /* Enable VSync End interrupt and be careful not to acknowledge any
1009 * pending interrupt.
1010 */
1011 ldintr = lcdc_read(ch->lcdc, _LDINTR);
1012 ldintr |= LDINTR_VEE | LDINTR_STATUS_MASK;
1013 lcdc_write(ch->lcdc, _LDINTR, ldintr);
1014
1015 ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion,
1016 msecs_to_jiffies(100));
1017 if (!ret)
1018 return -ETIMEDOUT;
1019
1020 return 0;
1021 }
1022
1023 static int sh_mobile_ioctl(struct fb_info *info, unsigned int cmd,
1024 unsigned long arg)
1025 {
1026 int retval;
1027
1028 switch (cmd) {
1029 case FBIO_WAITFORVSYNC:
1030 retval = sh_mobile_wait_for_vsync(info);
1031 break;
1032
1033 default:
1034 retval = -ENOIOCTLCMD;
1035 break;
1036 }
1037 return retval;
1038 }
1039
1040 static void sh_mobile_fb_reconfig(struct fb_info *info)
1041 {
1042 struct sh_mobile_lcdc_chan *ch = info->par;
1043 struct fb_videomode mode1, mode2;
1044 struct fb_event event;
1045 int evnt = FB_EVENT_MODE_CHANGE_ALL;
1046
1047 if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par))
1048 /* More framebuffer users are active */
1049 return;
1050
1051 fb_var_to_videomode(&mode1, &ch->display_var);
1052 fb_var_to_videomode(&mode2, &info->var);
1053
1054 if (fb_mode_is_equal(&mode1, &mode2))
1055 return;
1056
1057 /* Display has been re-plugged, framebuffer is free now, reconfigure */
1058 if (fb_set_var(info, &ch->display_var) < 0)
1059 /* Couldn't reconfigure, hopefully, can continue as before */
1060 return;
1061
1062 /*
1063 * fb_set_var() calls the notifier change internally, only if
1064 * FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a
1065 * user event, we have to call the chain ourselves.
1066 */
1067 event.info = info;
1068 event.data = &mode1;
1069 fb_notifier_call_chain(evnt, &event);
1070 }
1071
1072 /*
1073 * Locking: both .fb_release() and .fb_open() are called with info->lock held if
1074 * user == 1, or with console sem held, if user == 0.
1075 */
1076 static int sh_mobile_release(struct fb_info *info, int user)
1077 {
1078 struct sh_mobile_lcdc_chan *ch = info->par;
1079
1080 mutex_lock(&ch->open_lock);
1081 dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1082
1083 ch->use_count--;
1084
1085 /* Nothing to reconfigure, when called from fbcon */
1086 if (user) {
1087 console_lock();
1088 sh_mobile_fb_reconfig(info);
1089 console_unlock();
1090 }
1091
1092 mutex_unlock(&ch->open_lock);
1093
1094 return 0;
1095 }
1096
1097 static int sh_mobile_open(struct fb_info *info, int user)
1098 {
1099 struct sh_mobile_lcdc_chan *ch = info->par;
1100
1101 mutex_lock(&ch->open_lock);
1102 ch->use_count++;
1103
1104 dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1105 mutex_unlock(&ch->open_lock);
1106
1107 return 0;
1108 }
1109
1110 static int sh_mobile_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
1111 {
1112 struct sh_mobile_lcdc_chan *ch = info->par;
1113 struct sh_mobile_lcdc_priv *p = ch->lcdc;
1114 unsigned int best_dist = (unsigned int)-1;
1115 unsigned int best_xres = 0;
1116 unsigned int best_yres = 0;
1117 unsigned int i;
1118
1119 if (var->xres > MAX_XRES || var->yres > MAX_YRES)
1120 return -EINVAL;
1121
1122 /* If board code provides us with a list of available modes, make sure
1123 * we use one of them. Find the mode closest to the requested one. The
1124 * distance between two modes is defined as the size of the
1125 * non-overlapping parts of the two rectangles.
1126 */
1127 for (i = 0; i < ch->cfg.num_cfg; ++i) {
1128 const struct fb_videomode *mode = &ch->cfg.lcd_cfg[i];
1129 unsigned int dist;
1130
1131 /* We can only round up. */
1132 if (var->xres > mode->xres || var->yres > mode->yres)
1133 continue;
1134
1135 dist = var->xres * var->yres + mode->xres * mode->yres
1136 - 2 * min(var->xres, mode->xres)
1137 * min(var->yres, mode->yres);
1138
1139 if (dist < best_dist) {
1140 best_xres = mode->xres;
1141 best_yres = mode->yres;
1142 best_dist = dist;
1143 }
1144 }
1145
1146 /* If no available mode can be used, return an error. */
1147 if (ch->cfg.num_cfg != 0) {
1148 if (best_dist == (unsigned int)-1)
1149 return -EINVAL;
1150
1151 var->xres = best_xres;
1152 var->yres = best_yres;
1153 }
1154
1155 /* Make sure the virtual resolution is at least as big as the visible
1156 * resolution.
1157 */
1158 if (var->xres_virtual < var->xres)
1159 var->xres_virtual = var->xres;
1160 if (var->yres_virtual < var->yres)
1161 var->yres_virtual = var->yres;
1162
1163 if (sh_mobile_format_is_fourcc(var)) {
1164 switch (var->grayscale) {
1165 case V4L2_PIX_FMT_NV12:
1166 case V4L2_PIX_FMT_NV21:
1167 var->bits_per_pixel = 12;
1168 break;
1169 case V4L2_PIX_FMT_RGB565:
1170 case V4L2_PIX_FMT_NV16:
1171 case V4L2_PIX_FMT_NV61:
1172 var->bits_per_pixel = 16;
1173 break;
1174 case V4L2_PIX_FMT_BGR24:
1175 case V4L2_PIX_FMT_NV24:
1176 case V4L2_PIX_FMT_NV42:
1177 var->bits_per_pixel = 24;
1178 break;
1179 case V4L2_PIX_FMT_BGR32:
1180 var->bits_per_pixel = 32;
1181 break;
1182 default:
1183 return -EINVAL;
1184 }
1185
1186 /* Default to RGB and JPEG color-spaces for RGB and YUV formats
1187 * respectively.
1188 */
1189 if (!sh_mobile_format_is_yuv(var))
1190 var->colorspace = V4L2_COLORSPACE_SRGB;
1191 else if (var->colorspace != V4L2_COLORSPACE_REC709)
1192 var->colorspace = V4L2_COLORSPACE_JPEG;
1193 } else {
1194 if (var->bits_per_pixel <= 16) { /* RGB 565 */
1195 var->bits_per_pixel = 16;
1196 var->red.offset = 11;
1197 var->red.length = 5;
1198 var->green.offset = 5;
1199 var->green.length = 6;
1200 var->blue.offset = 0;
1201 var->blue.length = 5;
1202 var->transp.offset = 0;
1203 var->transp.length = 0;
1204 } else if (var->bits_per_pixel <= 24) { /* RGB 888 */
1205 var->bits_per_pixel = 24;
1206 var->red.offset = 16;
1207 var->red.length = 8;
1208 var->green.offset = 8;
1209 var->green.length = 8;
1210 var->blue.offset = 0;
1211 var->blue.length = 8;
1212 var->transp.offset = 0;
1213 var->transp.length = 0;
1214 } else if (var->bits_per_pixel <= 32) { /* RGBA 888 */
1215 var->bits_per_pixel = 32;
1216 var->red.offset = 16;
1217 var->red.length = 8;
1218 var->green.offset = 8;
1219 var->green.length = 8;
1220 var->blue.offset = 0;
1221 var->blue.length = 8;
1222 var->transp.offset = 24;
1223 var->transp.length = 8;
1224 } else
1225 return -EINVAL;
1226
1227 var->red.msb_right = 0;
1228 var->green.msb_right = 0;
1229 var->blue.msb_right = 0;
1230 var->transp.msb_right = 0;
1231 }
1232
1233 /* Make sure we don't exceed our allocated memory. */
1234 if (var->xres_virtual * var->yres_virtual * var->bits_per_pixel / 8 >
1235 info->fix.smem_len)
1236 return -EINVAL;
1237
1238 /* only accept the forced_fourcc for dual channel configurations */
1239 if (p->forced_fourcc &&
1240 p->forced_fourcc != sh_mobile_format_fourcc(var))
1241 return -EINVAL;
1242
1243 return 0;
1244 }
1245
1246 static int sh_mobile_set_par(struct fb_info *info)
1247 {
1248 struct sh_mobile_lcdc_chan *ch = info->par;
1249 u32 line_length = info->fix.line_length;
1250 int ret;
1251
1252 sh_mobile_lcdc_stop(ch->lcdc);
1253
1254 if (sh_mobile_format_is_yuv(&info->var))
1255 info->fix.line_length = info->var.xres;
1256 else
1257 info->fix.line_length = info->var.xres
1258 * info->var.bits_per_pixel / 8;
1259
1260 ret = sh_mobile_lcdc_start(ch->lcdc);
1261 if (ret < 0) {
1262 dev_err(info->dev, "%s: unable to restart LCDC\n", __func__);
1263 info->fix.line_length = line_length;
1264 }
1265
1266 if (sh_mobile_format_is_fourcc(&info->var)) {
1267 info->fix.type = FB_TYPE_FOURCC;
1268 info->fix.visual = FB_VISUAL_FOURCC;
1269 } else {
1270 info->fix.type = FB_TYPE_PACKED_PIXELS;
1271 info->fix.visual = FB_VISUAL_TRUECOLOR;
1272 }
1273
1274 return ret;
1275 }
1276
1277 /*
1278 * Screen blanking. Behavior is as follows:
1279 * FB_BLANK_UNBLANK: screen unblanked, clocks enabled
1280 * FB_BLANK_NORMAL: screen blanked, clocks enabled
1281 * FB_BLANK_VSYNC,
1282 * FB_BLANK_HSYNC,
1283 * FB_BLANK_POWEROFF: screen blanked, clocks disabled
1284 */
1285 static int sh_mobile_lcdc_blank(int blank, struct fb_info *info)
1286 {
1287 struct sh_mobile_lcdc_chan *ch = info->par;
1288 struct sh_mobile_lcdc_priv *p = ch->lcdc;
1289
1290 /* blank the screen? */
1291 if (blank > FB_BLANK_UNBLANK && ch->blank_status == FB_BLANK_UNBLANK) {
1292 struct fb_fillrect rect = {
1293 .width = info->var.xres,
1294 .height = info->var.yres,
1295 };
1296 sh_mobile_lcdc_fillrect(info, &rect);
1297 }
1298 /* turn clocks on? */
1299 if (blank <= FB_BLANK_NORMAL && ch->blank_status > FB_BLANK_NORMAL) {
1300 sh_mobile_lcdc_clk_on(p);
1301 }
1302 /* turn clocks off? */
1303 if (blank > FB_BLANK_NORMAL && ch->blank_status <= FB_BLANK_NORMAL) {
1304 /* make sure the screen is updated with the black fill before
1305 * switching the clocks off. one vsync is not enough since
1306 * blanking may occur in the middle of a refresh. deferred io
1307 * mode will reenable the clocks and update the screen in time,
1308 * so it does not need this. */
1309 if (!info->fbdefio) {
1310 sh_mobile_wait_for_vsync(info);
1311 sh_mobile_wait_for_vsync(info);
1312 }
1313 sh_mobile_lcdc_clk_off(p);
1314 }
1315
1316 ch->blank_status = blank;
1317 return 0;
1318 }
1319
1320 static struct fb_ops sh_mobile_lcdc_ops = {
1321 .owner = THIS_MODULE,
1322 .fb_setcolreg = sh_mobile_lcdc_setcolreg,
1323 .fb_read = fb_sys_read,
1324 .fb_write = fb_sys_write,
1325 .fb_fillrect = sh_mobile_lcdc_fillrect,
1326 .fb_copyarea = sh_mobile_lcdc_copyarea,
1327 .fb_imageblit = sh_mobile_lcdc_imageblit,
1328 .fb_blank = sh_mobile_lcdc_blank,
1329 .fb_pan_display = sh_mobile_fb_pan_display,
1330 .fb_ioctl = sh_mobile_ioctl,
1331 .fb_open = sh_mobile_open,
1332 .fb_release = sh_mobile_release,
1333 .fb_check_var = sh_mobile_check_var,
1334 .fb_set_par = sh_mobile_set_par,
1335 };
1336
1337 static int sh_mobile_lcdc_update_bl(struct backlight_device *bdev)
1338 {
1339 struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
1340 struct sh_mobile_lcdc_board_cfg *cfg = &ch->cfg.board_cfg;
1341 int brightness = bdev->props.brightness;
1342
1343 if (bdev->props.power != FB_BLANK_UNBLANK ||
1344 bdev->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
1345 brightness = 0;
1346
1347 return cfg->set_brightness(cfg->board_data, brightness);
1348 }
1349
1350 static int sh_mobile_lcdc_get_brightness(struct backlight_device *bdev)
1351 {
1352 struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
1353 struct sh_mobile_lcdc_board_cfg *cfg = &ch->cfg.board_cfg;
1354
1355 return cfg->get_brightness(cfg->board_data);
1356 }
1357
1358 static int sh_mobile_lcdc_check_fb(struct backlight_device *bdev,
1359 struct fb_info *info)
1360 {
1361 return (info->bl_dev == bdev);
1362 }
1363
1364 static struct backlight_ops sh_mobile_lcdc_bl_ops = {
1365 .options = BL_CORE_SUSPENDRESUME,
1366 .update_status = sh_mobile_lcdc_update_bl,
1367 .get_brightness = sh_mobile_lcdc_get_brightness,
1368 .check_fb = sh_mobile_lcdc_check_fb,
1369 };
1370
1371 static struct backlight_device *sh_mobile_lcdc_bl_probe(struct device *parent,
1372 struct sh_mobile_lcdc_chan *ch)
1373 {
1374 struct backlight_device *bl;
1375
1376 bl = backlight_device_register(ch->cfg.bl_info.name, parent, ch,
1377 &sh_mobile_lcdc_bl_ops, NULL);
1378 if (IS_ERR(bl)) {
1379 dev_err(parent, "unable to register backlight device: %ld\n",
1380 PTR_ERR(bl));
1381 return NULL;
1382 }
1383
1384 bl->props.max_brightness = ch->cfg.bl_info.max_brightness;
1385 bl->props.brightness = bl->props.max_brightness;
1386 backlight_update_status(bl);
1387
1388 return bl;
1389 }
1390
1391 static void sh_mobile_lcdc_bl_remove(struct backlight_device *bdev)
1392 {
1393 backlight_device_unregister(bdev);
1394 }
1395
1396 static int sh_mobile_lcdc_suspend(struct device *dev)
1397 {
1398 struct platform_device *pdev = to_platform_device(dev);
1399
1400 sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
1401 return 0;
1402 }
1403
1404 static int sh_mobile_lcdc_resume(struct device *dev)
1405 {
1406 struct platform_device *pdev = to_platform_device(dev);
1407
1408 return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
1409 }
1410
1411 static int sh_mobile_lcdc_runtime_suspend(struct device *dev)
1412 {
1413 struct platform_device *pdev = to_platform_device(dev);
1414 struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
1415
1416 /* turn off LCDC hardware */
1417 lcdc_write(priv, _LDCNT1R, 0);
1418
1419 return 0;
1420 }
1421
1422 static int sh_mobile_lcdc_runtime_resume(struct device *dev)
1423 {
1424 struct platform_device *pdev = to_platform_device(dev);
1425 struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
1426
1427 __sh_mobile_lcdc_start(priv);
1428
1429 return 0;
1430 }
1431
1432 static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
1433 .suspend = sh_mobile_lcdc_suspend,
1434 .resume = sh_mobile_lcdc_resume,
1435 .runtime_suspend = sh_mobile_lcdc_runtime_suspend,
1436 .runtime_resume = sh_mobile_lcdc_runtime_resume,
1437 };
1438
1439 /* locking: called with info->lock held */
1440 static int sh_mobile_lcdc_notify(struct notifier_block *nb,
1441 unsigned long action, void *data)
1442 {
1443 struct fb_event *event = data;
1444 struct fb_info *info = event->info;
1445 struct sh_mobile_lcdc_chan *ch = info->par;
1446 struct sh_mobile_lcdc_board_cfg *board_cfg = &ch->cfg.board_cfg;
1447
1448 if (&ch->lcdc->notifier != nb)
1449 return NOTIFY_DONE;
1450
1451 dev_dbg(info->dev, "%s(): action = %lu, data = %p\n",
1452 __func__, action, event->data);
1453
1454 switch(action) {
1455 case FB_EVENT_SUSPEND:
1456 if (board_cfg->display_off && try_module_get(board_cfg->owner)) {
1457 board_cfg->display_off(board_cfg->board_data);
1458 module_put(board_cfg->owner);
1459 }
1460 sh_mobile_lcdc_stop(ch->lcdc);
1461 break;
1462 case FB_EVENT_RESUME:
1463 mutex_lock(&ch->open_lock);
1464 sh_mobile_fb_reconfig(info);
1465 mutex_unlock(&ch->open_lock);
1466
1467 /* HDMI must be enabled before LCDC configuration */
1468 if (board_cfg->display_on && try_module_get(board_cfg->owner)) {
1469 board_cfg->display_on(board_cfg->board_data, info);
1470 module_put(board_cfg->owner);
1471 }
1472
1473 sh_mobile_lcdc_start(ch->lcdc);
1474 }
1475
1476 return NOTIFY_OK;
1477 }
1478
1479 static int sh_mobile_lcdc_remove(struct platform_device *pdev)
1480 {
1481 struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
1482 struct fb_info *info;
1483 int i;
1484
1485 fb_unregister_client(&priv->notifier);
1486
1487 for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
1488 if (priv->ch[i].info && priv->ch[i].info->dev)
1489 unregister_framebuffer(priv->ch[i].info);
1490
1491 sh_mobile_lcdc_stop(priv);
1492
1493 for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
1494 info = priv->ch[i].info;
1495
1496 if (!info || !info->device)
1497 continue;
1498
1499 if (priv->ch[i].sglist)
1500 vfree(priv->ch[i].sglist);
1501
1502 if (info->screen_base)
1503 dma_free_coherent(&pdev->dev, info->fix.smem_len,
1504 info->screen_base,
1505 priv->ch[i].dma_handle);
1506 fb_dealloc_cmap(&info->cmap);
1507 framebuffer_release(info);
1508 }
1509
1510 for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
1511 if (priv->ch[i].bl)
1512 sh_mobile_lcdc_bl_remove(priv->ch[i].bl);
1513 }
1514
1515 if (priv->dot_clk)
1516 clk_put(priv->dot_clk);
1517
1518 if (priv->dev)
1519 pm_runtime_disable(priv->dev);
1520
1521 if (priv->base)
1522 iounmap(priv->base);
1523
1524 if (priv->irq)
1525 free_irq(priv->irq, priv);
1526 kfree(priv);
1527 return 0;
1528 }
1529
1530 static int __devinit sh_mobile_lcdc_channel_init(struct sh_mobile_lcdc_chan *ch,
1531 struct device *dev)
1532 {
1533 struct sh_mobile_lcdc_chan_cfg *cfg = &ch->cfg;
1534 const struct fb_videomode *max_mode;
1535 const struct fb_videomode *mode;
1536 struct fb_var_screeninfo *var;
1537 struct fb_info *info;
1538 unsigned int max_size;
1539 int num_cfg;
1540 void *buf;
1541 int ret;
1542 int i;
1543
1544 mutex_init(&ch->open_lock);
1545
1546 /* Allocate the frame buffer device. */
1547 ch->info = framebuffer_alloc(0, dev);
1548 if (!ch->info) {
1549 dev_err(dev, "unable to allocate fb_info\n");
1550 return -ENOMEM;
1551 }
1552
1553 info = ch->info;
1554 info->fbops = &sh_mobile_lcdc_ops;
1555 info->par = ch;
1556 info->pseudo_palette = &ch->pseudo_palette;
1557 info->flags = FBINFO_FLAG_DEFAULT;
1558
1559 /* Iterate through the modes to validate them and find the highest
1560 * resolution.
1561 */
1562 max_mode = NULL;
1563 max_size = 0;
1564
1565 for (i = 0, mode = cfg->lcd_cfg; i < cfg->num_cfg; i++, mode++) {
1566 unsigned int size = mode->yres * mode->xres;
1567
1568 /* NV12/NV21 buffers must have even number of lines */
1569 if ((cfg->fourcc == V4L2_PIX_FMT_NV12 ||
1570 cfg->fourcc == V4L2_PIX_FMT_NV21) && (mode->yres & 0x1)) {
1571 dev_err(dev, "yres must be multiple of 2 for YCbCr420 "
1572 "mode.\n");
1573 return -EINVAL;
1574 }
1575
1576 if (size > max_size) {
1577 max_mode = mode;
1578 max_size = size;
1579 }
1580 }
1581
1582 if (!max_size)
1583 max_size = MAX_XRES * MAX_YRES;
1584 else
1585 dev_dbg(dev, "Found largest videomode %ux%u\n",
1586 max_mode->xres, max_mode->yres);
1587
1588 /* Create the mode list. */
1589 if (cfg->lcd_cfg == NULL) {
1590 mode = &default_720p;
1591 num_cfg = 1;
1592 } else {
1593 mode = cfg->lcd_cfg;
1594 num_cfg = cfg->num_cfg;
1595 }
1596
1597 fb_videomode_to_modelist(mode, num_cfg, &info->modelist);
1598
1599 /* Initialize variable screen information using the first mode as
1600 * default. The default Y virtual resolution is twice the panel size to
1601 * allow for double-buffering.
1602 */
1603 var = &info->var;
1604 fb_videomode_to_var(var, mode);
1605 var->width = cfg->lcd_size_cfg.width;
1606 var->height = cfg->lcd_size_cfg.height;
1607 var->yres_virtual = var->yres * 2;
1608 var->activate = FB_ACTIVATE_NOW;
1609
1610 switch (cfg->fourcc) {
1611 case V4L2_PIX_FMT_RGB565:
1612 var->bits_per_pixel = 16;
1613 break;
1614 case V4L2_PIX_FMT_BGR24:
1615 var->bits_per_pixel = 24;
1616 break;
1617 case V4L2_PIX_FMT_BGR32:
1618 var->bits_per_pixel = 32;
1619 break;
1620 default:
1621 var->grayscale = cfg->fourcc;
1622 break;
1623 }
1624
1625 /* Make sure the memory size check won't fail. smem_len is initialized
1626 * later based on var.
1627 */
1628 info->fix.smem_len = UINT_MAX;
1629 ret = sh_mobile_check_var(var, info);
1630 if (ret)
1631 return ret;
1632
1633 max_size = max_size * var->bits_per_pixel / 8 * 2;
1634
1635 /* Allocate frame buffer memory and color map. */
1636 buf = dma_alloc_coherent(dev, max_size, &ch->dma_handle, GFP_KERNEL);
1637 if (!buf) {
1638 dev_err(dev, "unable to allocate buffer\n");
1639 return -ENOMEM;
1640 }
1641
1642 ret = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
1643 if (ret < 0) {
1644 dev_err(dev, "unable to allocate cmap\n");
1645 dma_free_coherent(dev, max_size, buf, ch->dma_handle);
1646 return ret;
1647 }
1648
1649 /* Initialize fixed screen information. Restrict pan to 2 lines steps
1650 * for NV12 and NV21.
1651 */
1652 info->fix = sh_mobile_lcdc_fix;
1653 info->fix.smem_start = ch->dma_handle;
1654 info->fix.smem_len = max_size;
1655 if (cfg->fourcc == V4L2_PIX_FMT_NV12 ||
1656 cfg->fourcc == V4L2_PIX_FMT_NV21)
1657 info->fix.ypanstep = 2;
1658
1659 if (sh_mobile_format_is_yuv(var)) {
1660 info->fix.line_length = var->xres;
1661 info->fix.visual = FB_VISUAL_FOURCC;
1662 } else {
1663 info->fix.line_length = var->xres * var->bits_per_pixel / 8;
1664 info->fix.visual = FB_VISUAL_TRUECOLOR;
1665 }
1666
1667 info->screen_base = buf;
1668 info->device = dev;
1669 ch->display_var = *var;
1670
1671 return 0;
1672 }
1673
1674 static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev)
1675 {
1676 struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data;
1677 struct sh_mobile_lcdc_priv *priv;
1678 struct resource *res;
1679 int num_channels;
1680 int error;
1681 int i;
1682
1683 if (!pdata) {
1684 dev_err(&pdev->dev, "no platform data defined\n");
1685 return -EINVAL;
1686 }
1687
1688 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1689 i = platform_get_irq(pdev, 0);
1690 if (!res || i < 0) {
1691 dev_err(&pdev->dev, "cannot get platform resources\n");
1692 return -ENOENT;
1693 }
1694
1695 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
1696 if (!priv) {
1697 dev_err(&pdev->dev, "cannot allocate device data\n");
1698 return -ENOMEM;
1699 }
1700
1701 platform_set_drvdata(pdev, priv);
1702
1703 error = request_irq(i, sh_mobile_lcdc_irq, 0,
1704 dev_name(&pdev->dev), priv);
1705 if (error) {
1706 dev_err(&pdev->dev, "unable to request irq\n");
1707 goto err1;
1708 }
1709
1710 priv->irq = i;
1711 atomic_set(&priv->hw_usecnt, -1);
1712
1713 for (i = 0, num_channels = 0; i < ARRAY_SIZE(pdata->ch); i++) {
1714 struct sh_mobile_lcdc_chan *ch = priv->ch + num_channels;
1715
1716 ch->lcdc = priv;
1717 memcpy(&ch->cfg, &pdata->ch[i], sizeof(pdata->ch[i]));
1718
1719 error = sh_mobile_lcdc_check_interface(ch);
1720 if (error) {
1721 dev_err(&pdev->dev, "unsupported interface type\n");
1722 goto err1;
1723 }
1724 init_waitqueue_head(&ch->frame_end_wait);
1725 init_completion(&ch->vsync_completion);
1726 ch->pan_offset = 0;
1727
1728 /* probe the backlight is there is one defined */
1729 if (ch->cfg.bl_info.max_brightness)
1730 ch->bl = sh_mobile_lcdc_bl_probe(&pdev->dev, ch);
1731
1732 switch (pdata->ch[i].chan) {
1733 case LCDC_CHAN_MAINLCD:
1734 ch->enabled = LDCNT2R_ME;
1735 ch->reg_offs = lcdc_offs_mainlcd;
1736 num_channels++;
1737 break;
1738 case LCDC_CHAN_SUBLCD:
1739 ch->enabled = LDCNT2R_SE;
1740 ch->reg_offs = lcdc_offs_sublcd;
1741 num_channels++;
1742 break;
1743 }
1744 }
1745
1746 if (!num_channels) {
1747 dev_err(&pdev->dev, "no channels defined\n");
1748 error = -EINVAL;
1749 goto err1;
1750 }
1751
1752 /* for dual channel LCDC (MAIN + SUB) force shared format setting */
1753 if (num_channels == 2)
1754 priv->forced_fourcc = pdata->ch[0].fourcc;
1755
1756 priv->base = ioremap_nocache(res->start, resource_size(res));
1757 if (!priv->base)
1758 goto err1;
1759
1760 error = sh_mobile_lcdc_setup_clocks(pdev, pdata->clock_source, priv);
1761 if (error) {
1762 dev_err(&pdev->dev, "unable to setup clocks\n");
1763 goto err1;
1764 }
1765
1766 priv->meram_dev = pdata->meram_dev;
1767
1768 for (i = 0; i < num_channels; i++) {
1769 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
1770
1771 error = sh_mobile_lcdc_channel_init(ch, &pdev->dev);
1772 if (error)
1773 goto err1;
1774 }
1775
1776 error = sh_mobile_lcdc_start(priv);
1777 if (error) {
1778 dev_err(&pdev->dev, "unable to start hardware\n");
1779 goto err1;
1780 }
1781
1782 for (i = 0; i < num_channels; i++) {
1783 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
1784 struct fb_info *info = ch->info;
1785
1786 if (info->fbdefio) {
1787 ch->sglist = vmalloc(sizeof(struct scatterlist) *
1788 info->fix.smem_len >> PAGE_SHIFT);
1789 if (!ch->sglist) {
1790 dev_err(&pdev->dev, "cannot allocate sglist\n");
1791 goto err1;
1792 }
1793 }
1794
1795 info->bl_dev = ch->bl;
1796
1797 error = register_framebuffer(info);
1798 if (error < 0)
1799 goto err1;
1800
1801 dev_info(info->dev, "registered %s/%s as %dx%d %dbpp.\n",
1802 pdev->name, (ch->cfg.chan == LCDC_CHAN_MAINLCD) ?
1803 "mainlcd" : "sublcd", info->var.xres, info->var.yres,
1804 info->var.bits_per_pixel);
1805
1806 /* deferred io mode: disable clock to save power */
1807 if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED)
1808 sh_mobile_lcdc_clk_off(priv);
1809 }
1810
1811 /* Failure ignored */
1812 priv->notifier.notifier_call = sh_mobile_lcdc_notify;
1813 fb_register_client(&priv->notifier);
1814
1815 return 0;
1816 err1:
1817 sh_mobile_lcdc_remove(pdev);
1818
1819 return error;
1820 }
1821
1822 static struct platform_driver sh_mobile_lcdc_driver = {
1823 .driver = {
1824 .name = "sh_mobile_lcdc_fb",
1825 .owner = THIS_MODULE,
1826 .pm = &sh_mobile_lcdc_dev_pm_ops,
1827 },
1828 .probe = sh_mobile_lcdc_probe,
1829 .remove = sh_mobile_lcdc_remove,
1830 };
1831
1832 module_platform_driver(sh_mobile_lcdc_driver);
1833
1834 MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
1835 MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
1836 MODULE_LICENSE("GPL v2");
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