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jbd: Issue cache flush after checkpointing
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / video / sh_mobile_lcdcfb.c
blobfacffc2549766e3ebefd5b8a13e78721523946eb
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/vmalloc.h>
21 #include <linux/ioctl.h>
22 #include <linux/slab.h>
23 #include <linux/console.h>
24 #include <linux/backlight.h>
25 #include <linux/gpio.h>
26 #include <linux/module.h>
27 #include <video/sh_mobile_lcdc.h>
28 #include <video/sh_mobile_meram.h>
29 #include <linux/atomic.h>
30
31 #include "sh_mobile_lcdcfb.h"
32
33 #define SIDE_B_OFFSET 0x1000
34 #define MIRROR_OFFSET 0x2000
35
36 #define MAX_XRES 1920
37 #define MAX_YRES 1080
38
39 static unsigned long lcdc_offs_mainlcd[NR_CH_REGS] = {
40 [LDDCKPAT1R] = 0x400,
41 [LDDCKPAT2R] = 0x404,
42 [LDMT1R] = 0x418,
43 [LDMT2R] = 0x41c,
44 [LDMT3R] = 0x420,
45 [LDDFR] = 0x424,
46 [LDSM1R] = 0x428,
47 [LDSM2R] = 0x42c,
48 [LDSA1R] = 0x430,
49 [LDSA2R] = 0x434,
50 [LDMLSR] = 0x438,
51 [LDHCNR] = 0x448,
52 [LDHSYNR] = 0x44c,
53 [LDVLNR] = 0x450,
54 [LDVSYNR] = 0x454,
55 [LDPMR] = 0x460,
56 [LDHAJR] = 0x4a0,
57 };
58
59 static unsigned long lcdc_offs_sublcd[NR_CH_REGS] = {
60 [LDDCKPAT1R] = 0x408,
61 [LDDCKPAT2R] = 0x40c,
62 [LDMT1R] = 0x600,
63 [LDMT2R] = 0x604,
64 [LDMT3R] = 0x608,
65 [LDDFR] = 0x60c,
66 [LDSM1R] = 0x610,
67 [LDSM2R] = 0x614,
68 [LDSA1R] = 0x618,
69 [LDMLSR] = 0x620,
70 [LDHCNR] = 0x624,
71 [LDHSYNR] = 0x628,
72 [LDVLNR] = 0x62c,
73 [LDVSYNR] = 0x630,
74 [LDPMR] = 0x63c,
75 };
76
77 static const struct fb_videomode default_720p = {
78 .name = "HDMI 720p",
79 .xres = 1280,
80 .yres = 720,
81
82 .left_margin = 220,
83 .right_margin = 110,
84 .hsync_len = 40,
85
86 .upper_margin = 20,
87 .lower_margin = 5,
88 .vsync_len = 5,
89
90 .pixclock = 13468,
91 .refresh = 60,
92 .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT,
93 };
94
95 struct sh_mobile_lcdc_priv {
96 void __iomem *base;
97 int irq;
98 atomic_t hw_usecnt;
99 struct device *dev;
100 struct clk *dot_clk;
101 unsigned long lddckr;
102 struct sh_mobile_lcdc_chan ch[2];
103 struct notifier_block notifier;
104 int started;
105 int forced_bpp; /* 2 channel LCDC must share bpp setting */
106 struct sh_mobile_meram_info *meram_dev;
107 };
108
109 static bool banked(int reg_nr)
110 {
111 switch (reg_nr) {
112 case LDMT1R:
113 case LDMT2R:
114 case LDMT3R:
115 case LDDFR:
116 case LDSM1R:
117 case LDSA1R:
118 case LDSA2R:
119 case LDMLSR:
120 case LDHCNR:
121 case LDHSYNR:
122 case LDVLNR:
123 case LDVSYNR:
124 return true;
125 }
126 return false;
127 }
128
129 static void lcdc_write_chan(struct sh_mobile_lcdc_chan *chan,
130 int reg_nr, unsigned long data)
131 {
132 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr]);
133 if (banked(reg_nr))
134 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
135 SIDE_B_OFFSET);
136 }
137
138 static void lcdc_write_chan_mirror(struct sh_mobile_lcdc_chan *chan,
139 int reg_nr, unsigned long data)
140 {
141 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
142 MIRROR_OFFSET);
143 }
144
145 static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan *chan,
146 int reg_nr)
147 {
148 return ioread32(chan->lcdc->base + chan->reg_offs[reg_nr]);
149 }
150
151 static void lcdc_write(struct sh_mobile_lcdc_priv *priv,
152 unsigned long reg_offs, unsigned long data)
153 {
154 iowrite32(data, priv->base + reg_offs);
155 }
156
157 static unsigned long lcdc_read(struct sh_mobile_lcdc_priv *priv,
158 unsigned long reg_offs)
159 {
160 return ioread32(priv->base + reg_offs);
161 }
162
163 static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv,
164 unsigned long reg_offs,
165 unsigned long mask, unsigned long until)
166 {
167 while ((lcdc_read(priv, reg_offs) & mask) != until)
168 cpu_relax();
169 }
170
171 static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan)
172 {
173 return chan->cfg.chan == LCDC_CHAN_SUBLCD;
174 }
175
176 static void lcdc_sys_write_index(void *handle, unsigned long data)
177 {
178 struct sh_mobile_lcdc_chan *ch = handle;
179
180 lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT);
181 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
182 lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
183 (lcdc_chan_is_sublcd(ch) ? 2 : 0));
184 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
185 }
186
187 static void lcdc_sys_write_data(void *handle, unsigned long data)
188 {
189 struct sh_mobile_lcdc_chan *ch = handle;
190
191 lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT | LDDWDxR_RSW);
192 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
193 lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
194 (lcdc_chan_is_sublcd(ch) ? 2 : 0));
195 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
196 }
197
198 static unsigned long lcdc_sys_read_data(void *handle)
199 {
200 struct sh_mobile_lcdc_chan *ch = handle;
201
202 lcdc_write(ch->lcdc, _LDDRDR, LDDRDR_RSR);
203 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
204 lcdc_write(ch->lcdc, _LDDRAR, LDDRAR_RA |
205 (lcdc_chan_is_sublcd(ch) ? 2 : 0));
206 udelay(1);
207 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
208
209 return lcdc_read(ch->lcdc, _LDDRDR) & LDDRDR_DRD_MASK;
210 }
211
212 struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = {
213 lcdc_sys_write_index,
214 lcdc_sys_write_data,
215 lcdc_sys_read_data,
216 };
217
218 static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv)
219 {
220 if (atomic_inc_and_test(&priv->hw_usecnt)) {
221 if (priv->dot_clk)
222 clk_enable(priv->dot_clk);
223 pm_runtime_get_sync(priv->dev);
224 if (priv->meram_dev && priv->meram_dev->pdev)
225 pm_runtime_get_sync(&priv->meram_dev->pdev->dev);
226 }
227 }
228
229 static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv)
230 {
231 if (atomic_sub_return(1, &priv->hw_usecnt) == -1) {
232 if (priv->meram_dev && priv->meram_dev->pdev)
233 pm_runtime_put_sync(&priv->meram_dev->pdev->dev);
234 pm_runtime_put(priv->dev);
235 if (priv->dot_clk)
236 clk_disable(priv->dot_clk);
237 }
238 }
239
240 static int sh_mobile_lcdc_sginit(struct fb_info *info,
241 struct list_head *pagelist)
242 {
243 struct sh_mobile_lcdc_chan *ch = info->par;
244 unsigned int nr_pages_max = info->fix.smem_len >> PAGE_SHIFT;
245 struct page *page;
246 int nr_pages = 0;
247
248 sg_init_table(ch->sglist, nr_pages_max);
249
250 list_for_each_entry(page, pagelist, lru)
251 sg_set_page(&ch->sglist[nr_pages++], page, PAGE_SIZE, 0);
252
253 return nr_pages;
254 }
255
256 static void sh_mobile_lcdc_deferred_io(struct fb_info *info,
257 struct list_head *pagelist)
258 {
259 struct sh_mobile_lcdc_chan *ch = info->par;
260 struct sh_mobile_lcdc_board_cfg *bcfg = &ch->cfg.board_cfg;
261
262 /* enable clocks before accessing hardware */
263 sh_mobile_lcdc_clk_on(ch->lcdc);
264
265 /*
266 * It's possible to get here without anything on the pagelist via
267 * sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync()
268 * invocation. In the former case, the acceleration routines are
269 * stepped in to when using the framebuffer console causing the
270 * workqueue to be scheduled without any dirty pages on the list.
271 *
272 * Despite this, a panel update is still needed given that the
273 * acceleration routines have their own methods for writing in
274 * that still need to be updated.
275 *
276 * The fsync() and empty pagelist case could be optimized for,
277 * but we don't bother, as any application exhibiting such
278 * behaviour is fundamentally broken anyways.
279 */
280 if (!list_empty(pagelist)) {
281 unsigned int nr_pages = sh_mobile_lcdc_sginit(info, pagelist);
282
283 /* trigger panel update */
284 dma_map_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
285 if (bcfg->start_transfer)
286 bcfg->start_transfer(bcfg->board_data, ch,
287 &sh_mobile_lcdc_sys_bus_ops);
288 lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
289 dma_unmap_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
290 } else {
291 if (bcfg->start_transfer)
292 bcfg->start_transfer(bcfg->board_data, ch,
293 &sh_mobile_lcdc_sys_bus_ops);
294 lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
295 }
296 }
297
298 static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info)
299 {
300 struct fb_deferred_io *fbdefio = info->fbdefio;
301
302 if (fbdefio)
303 schedule_delayed_work(&info->deferred_work, fbdefio->delay);
304 }
305
306 static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
307 {
308 struct sh_mobile_lcdc_priv *priv = data;
309 struct sh_mobile_lcdc_chan *ch;
310 unsigned long ldintr;
311 int is_sub;
312 int k;
313
314 /* Acknowledge interrupts and disable further VSYNC End IRQs. */
315 ldintr = lcdc_read(priv, _LDINTR);
316 lcdc_write(priv, _LDINTR, (ldintr ^ LDINTR_STATUS_MASK) & ~LDINTR_VEE);
317
318 /* figure out if this interrupt is for main or sub lcd */
319 is_sub = (lcdc_read(priv, _LDSR) & LDSR_MSS) ? 1 : 0;
320
321 /* wake up channel and disable clocks */
322 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
323 ch = &priv->ch[k];
324
325 if (!ch->enabled)
326 continue;
327
328 /* Frame End */
329 if (ldintr & LDINTR_FS) {
330 if (is_sub == lcdc_chan_is_sublcd(ch)) {
331 ch->frame_end = 1;
332 wake_up(&ch->frame_end_wait);
333
334 sh_mobile_lcdc_clk_off(priv);
335 }
336 }
337
338 /* VSYNC End */
339 if (ldintr & LDINTR_VES)
340 complete(&ch->vsync_completion);
341 }
342
343 return IRQ_HANDLED;
344 }
345
346 static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv,
347 int start)
348 {
349 unsigned long tmp = lcdc_read(priv, _LDCNT2R);
350 int k;
351
352 /* start or stop the lcdc */
353 if (start)
354 lcdc_write(priv, _LDCNT2R, tmp | LDCNT2R_DO);
355 else
356 lcdc_write(priv, _LDCNT2R, tmp & ~LDCNT2R_DO);
357
358 /* wait until power is applied/stopped on all channels */
359 for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
360 if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled)
361 while (1) {
362 tmp = lcdc_read_chan(&priv->ch[k], LDPMR)
363 & LDPMR_LPS;
364 if (start && tmp == LDPMR_LPS)
365 break;
366 if (!start && tmp == 0)
367 break;
368 cpu_relax();
369 }
370
371 if (!start)
372 lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */
373 }
374
375 static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch)
376 {
377 struct fb_var_screeninfo *var = &ch->info->var, *display_var = &ch->display_var;
378 unsigned long h_total, hsync_pos, display_h_total;
379 u32 tmp;
380
381 tmp = ch->ldmt1r_value;
382 tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : LDMT1R_VPOL;
383 tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : LDMT1R_HPOL;
384 tmp |= (ch->cfg.flags & LCDC_FLAGS_DWPOL) ? LDMT1R_DWPOL : 0;
385 tmp |= (ch->cfg.flags & LCDC_FLAGS_DIPOL) ? LDMT1R_DIPOL : 0;
386 tmp |= (ch->cfg.flags & LCDC_FLAGS_DAPOL) ? LDMT1R_DAPOL : 0;
387 tmp |= (ch->cfg.flags & LCDC_FLAGS_HSCNT) ? LDMT1R_HSCNT : 0;
388 tmp |= (ch->cfg.flags & LCDC_FLAGS_DWCNT) ? LDMT1R_DWCNT : 0;
389 lcdc_write_chan(ch, LDMT1R, tmp);
390
391 /* setup SYS bus */
392 lcdc_write_chan(ch, LDMT2R, ch->cfg.sys_bus_cfg.ldmt2r);
393 lcdc_write_chan(ch, LDMT3R, ch->cfg.sys_bus_cfg.ldmt3r);
394
395 /* horizontal configuration */
396 h_total = display_var->xres + display_var->hsync_len +
397 display_var->left_margin + display_var->right_margin;
398 tmp = h_total / 8; /* HTCN */
399 tmp |= (min(display_var->xres, var->xres) / 8) << 16; /* HDCN */
400 lcdc_write_chan(ch, LDHCNR, tmp);
401
402 hsync_pos = display_var->xres + display_var->right_margin;
403 tmp = hsync_pos / 8; /* HSYNP */
404 tmp |= (display_var->hsync_len / 8) << 16; /* HSYNW */
405 lcdc_write_chan(ch, LDHSYNR, tmp);
406
407 /* vertical configuration */
408 tmp = display_var->yres + display_var->vsync_len +
409 display_var->upper_margin + display_var->lower_margin; /* VTLN */
410 tmp |= min(display_var->yres, var->yres) << 16; /* VDLN */
411 lcdc_write_chan(ch, LDVLNR, tmp);
412
413 tmp = display_var->yres + display_var->lower_margin; /* VSYNP */
414 tmp |= display_var->vsync_len << 16; /* VSYNW */
415 lcdc_write_chan(ch, LDVSYNR, tmp);
416
417 /* Adjust horizontal synchronisation for HDMI */
418 display_h_total = display_var->xres + display_var->hsync_len +
419 display_var->left_margin + display_var->right_margin;
420 tmp = ((display_var->xres & 7) << 24) |
421 ((display_h_total & 7) << 16) |
422 ((display_var->hsync_len & 7) << 8) |
423 hsync_pos;
424 lcdc_write_chan(ch, LDHAJR, tmp);
425 }
426
427 /*
428 * __sh_mobile_lcdc_start - Configure and tart the LCDC
429 * @priv: LCDC device
430 *
431 * Configure all enabled channels and start the LCDC device. All external
432 * devices (clocks, MERAM, panels, ...) are not touched by this function.
433 */
434 static void __sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
435 {
436 struct sh_mobile_lcdc_chan *ch;
437 unsigned long tmp;
438 int bpp = 0;
439 int k, m;
440
441 /* Enable LCDC channels. Read data from external memory, avoid using the
442 * BEU for now.
443 */
444 lcdc_write(priv, _LDCNT2R, priv->ch[0].enabled | priv->ch[1].enabled);
445
446 /* Stop the LCDC first and disable all interrupts. */
447 sh_mobile_lcdc_start_stop(priv, 0);
448 lcdc_write(priv, _LDINTR, 0);
449
450 /* Configure power supply, dot clocks and start them. */
451 tmp = priv->lddckr;
452 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
453 ch = &priv->ch[k];
454 if (!ch->enabled)
455 continue;
456
457 if (!bpp)
458 bpp = ch->info->var.bits_per_pixel;
459
460 /* Power supply */
461 lcdc_write_chan(ch, LDPMR, 0);
462
463 m = ch->cfg.clock_divider;
464 if (!m)
465 continue;
466
467 /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider
468 * denominator.
469 */
470 lcdc_write_chan(ch, LDDCKPAT1R, 0);
471 lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1);
472
473 if (m == 1)
474 m = LDDCKR_MOSEL;
475 tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
476 }
477
478 lcdc_write(priv, _LDDCKR, tmp);
479 lcdc_write(priv, _LDDCKSTPR, 0);
480 lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0);
481
482 /* Setup geometry, format, frame buffer memory and operation mode. */
483 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
484 ch = &priv->ch[k];
485 if (!ch->enabled)
486 continue;
487
488 sh_mobile_lcdc_geometry(ch);
489
490 if (ch->info->var.nonstd) {
491 tmp = (ch->info->var.nonstd << 16);
492 switch (ch->info->var.bits_per_pixel) {
493 case 12:
494 tmp |= LDDFR_YF_420;
495 break;
496 case 16:
497 tmp |= LDDFR_YF_422;
498 break;
499 case 24:
500 default:
501 tmp |= LDDFR_YF_444;
502 break;
503 }
504 } else {
505 switch (ch->info->var.bits_per_pixel) {
506 case 16:
507 tmp = LDDFR_PKF_RGB16;
508 break;
509 case 24:
510 tmp = LDDFR_PKF_RGB24;
511 break;
512 case 32:
513 default:
514 tmp = LDDFR_PKF_ARGB32;
515 break;
516 }
517 }
518
519 lcdc_write_chan(ch, LDDFR, tmp);
520 lcdc_write_chan(ch, LDMLSR, ch->pitch);
521 lcdc_write_chan(ch, LDSA1R, ch->base_addr_y);
522 if (ch->info->var.nonstd)
523 lcdc_write_chan(ch, LDSA2R, ch->base_addr_c);
524
525 /* When using deferred I/O mode, configure the LCDC for one-shot
526 * operation and enable the frame end interrupt. Otherwise use
527 * continuous read mode.
528 */
529 if (ch->ldmt1r_value & LDMT1R_IFM &&
530 ch->cfg.sys_bus_cfg.deferred_io_msec) {
531 lcdc_write_chan(ch, LDSM1R, LDSM1R_OS);
532 lcdc_write(priv, _LDINTR, LDINTR_FE);
533 } else {
534 lcdc_write_chan(ch, LDSM1R, 0);
535 }
536 }
537
538 /* Word and long word swap. */
539 if (priv->ch[0].info->var.nonstd)
540 tmp = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
541 else {
542 switch (bpp) {
543 case 16:
544 tmp = LDDDSR_LS | LDDDSR_WS;
545 break;
546 case 24:
547 tmp = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
548 break;
549 case 32:
550 default:
551 tmp = LDDDSR_LS;
552 break;
553 }
554 }
555 lcdc_write(priv, _LDDDSR, tmp);
556
557 /* Enable the display output. */
558 lcdc_write(priv, _LDCNT1R, LDCNT1R_DE);
559 sh_mobile_lcdc_start_stop(priv, 1);
560 priv->started = 1;
561 }
562
563 static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
564 {
565 struct sh_mobile_meram_info *mdev = priv->meram_dev;
566 struct sh_mobile_lcdc_board_cfg *board_cfg;
567 struct sh_mobile_lcdc_chan *ch;
568 unsigned long tmp;
569 int ret;
570 int k;
571
572 /* enable clocks before accessing the hardware */
573 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
574 if (priv->ch[k].enabled)
575 sh_mobile_lcdc_clk_on(priv);
576 }
577
578 /* reset */
579 lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LDCNT2R_BR);
580 lcdc_wait_bit(priv, _LDCNT2R, LDCNT2R_BR, 0);
581
582 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
583 ch = &priv->ch[k];
584
585 if (!ch->enabled)
586 continue;
587
588 board_cfg = &ch->cfg.board_cfg;
589 if (board_cfg->setup_sys) {
590 ret = board_cfg->setup_sys(board_cfg->board_data, ch,
591 &sh_mobile_lcdc_sys_bus_ops);
592 if (ret)
593 return ret;
594 }
595 }
596
597 /* Compute frame buffer base address and pitch for each channel. */
598 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
599 struct sh_mobile_meram_cfg *cfg;
600 int pixelformat;
601
602 ch = &priv->ch[k];
603 if (!ch->enabled)
604 continue;
605
606 ch->base_addr_y = ch->info->fix.smem_start;
607 ch->base_addr_c = ch->base_addr_y
608 + ch->info->var.xres
609 * ch->info->var.yres_virtual;
610 ch->pitch = ch->info->fix.line_length;
611
612 /* Enable MERAM if possible. */
613 cfg = ch->cfg.meram_cfg;
614 if (mdev == NULL || mdev->ops == NULL || cfg == NULL)
615 continue;
616
617 /* we need to de-init configured ICBs before we can
618 * re-initialize them.
619 */
620 if (ch->meram_enabled) {
621 mdev->ops->meram_unregister(mdev, cfg);
622 ch->meram_enabled = 0;
623 }
624
625 if (!ch->info->var.nonstd)
626 pixelformat = SH_MOBILE_MERAM_PF_RGB;
627 else if (ch->info->var.bits_per_pixel == 24)
628 pixelformat = SH_MOBILE_MERAM_PF_NV24;
629 else
630 pixelformat = SH_MOBILE_MERAM_PF_NV;
631
632 ret = mdev->ops->meram_register(mdev, cfg, ch->pitch,
633 ch->info->var.yres, pixelformat,
634 ch->base_addr_y, ch->base_addr_c,
635 &ch->base_addr_y, &ch->base_addr_c,
636 &ch->pitch);
637 if (!ret)
638 ch->meram_enabled = 1;
639 }
640
641 /* Start the LCDC. */
642 __sh_mobile_lcdc_start(priv);
643
644 /* Setup deferred I/O, tell the board code to enable the panels, and
645 * turn backlight on.
646 */
647 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
648 ch = &priv->ch[k];
649 if (!ch->enabled)
650 continue;
651
652 tmp = ch->cfg.sys_bus_cfg.deferred_io_msec;
653 if (ch->ldmt1r_value & LDMT1R_IFM && tmp) {
654 ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
655 ch->defio.delay = msecs_to_jiffies(tmp);
656 ch->info->fbdefio = &ch->defio;
657 fb_deferred_io_init(ch->info);
658 }
659
660 board_cfg = &ch->cfg.board_cfg;
661 if (board_cfg->display_on && try_module_get(board_cfg->owner)) {
662 board_cfg->display_on(board_cfg->board_data, ch->info);
663 module_put(board_cfg->owner);
664 }
665
666 if (ch->bl) {
667 ch->bl->props.power = FB_BLANK_UNBLANK;
668 backlight_update_status(ch->bl);
669 }
670 }
671
672 return 0;
673 }
674
675 static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
676 {
677 struct sh_mobile_lcdc_chan *ch;
678 struct sh_mobile_lcdc_board_cfg *board_cfg;
679 int k;
680
681 /* clean up deferred io and ask board code to disable panel */
682 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
683 ch = &priv->ch[k];
684 if (!ch->enabled)
685 continue;
686
687 /* deferred io mode:
688 * flush frame, and wait for frame end interrupt
689 * clean up deferred io and enable clock
690 */
691 if (ch->info && ch->info->fbdefio) {
692 ch->frame_end = 0;
693 schedule_delayed_work(&ch->info->deferred_work, 0);
694 wait_event(ch->frame_end_wait, ch->frame_end);
695 fb_deferred_io_cleanup(ch->info);
696 ch->info->fbdefio = NULL;
697 sh_mobile_lcdc_clk_on(priv);
698 }
699
700 if (ch->bl) {
701 ch->bl->props.power = FB_BLANK_POWERDOWN;
702 backlight_update_status(ch->bl);
703 }
704
705 board_cfg = &ch->cfg.board_cfg;
706 if (board_cfg->display_off && try_module_get(board_cfg->owner)) {
707 board_cfg->display_off(board_cfg->board_data);
708 module_put(board_cfg->owner);
709 }
710
711 /* disable the meram */
712 if (ch->meram_enabled) {
713 struct sh_mobile_meram_cfg *cfg;
714 struct sh_mobile_meram_info *mdev;
715 cfg = ch->cfg.meram_cfg;
716 mdev = priv->meram_dev;
717 mdev->ops->meram_unregister(mdev, cfg);
718 ch->meram_enabled = 0;
719 }
720
721 }
722
723 /* stop the lcdc */
724 if (priv->started) {
725 sh_mobile_lcdc_start_stop(priv, 0);
726 priv->started = 0;
727 }
728
729 /* stop clocks */
730 for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
731 if (priv->ch[k].enabled)
732 sh_mobile_lcdc_clk_off(priv);
733 }
734
735 static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
736 {
737 int interface_type = ch->cfg.interface_type;
738
739 switch (interface_type) {
740 case RGB8:
741 case RGB9:
742 case RGB12A:
743 case RGB12B:
744 case RGB16:
745 case RGB18:
746 case RGB24:
747 case SYS8A:
748 case SYS8B:
749 case SYS8C:
750 case SYS8D:
751 case SYS9:
752 case SYS12:
753 case SYS16A:
754 case SYS16B:
755 case SYS16C:
756 case SYS18:
757 case SYS24:
758 break;
759 default:
760 return -EINVAL;
761 }
762
763 /* SUBLCD only supports SYS interface */
764 if (lcdc_chan_is_sublcd(ch)) {
765 if (!(interface_type & LDMT1R_IFM))
766 return -EINVAL;
767
768 interface_type &= ~LDMT1R_IFM;
769 }
770
771 ch->ldmt1r_value = interface_type;
772 return 0;
773 }
774
775 static int sh_mobile_lcdc_setup_clocks(struct platform_device *pdev,
776 int clock_source,
777 struct sh_mobile_lcdc_priv *priv)
778 {
779 char *str;
780
781 switch (clock_source) {
782 case LCDC_CLK_BUS:
783 str = "bus_clk";
784 priv->lddckr = LDDCKR_ICKSEL_BUS;
785 break;
786 case LCDC_CLK_PERIPHERAL:
787 str = "peripheral_clk";
788 priv->lddckr = LDDCKR_ICKSEL_MIPI;
789 break;
790 case LCDC_CLK_EXTERNAL:
791 str = NULL;
792 priv->lddckr = LDDCKR_ICKSEL_HDMI;
793 break;
794 default:
795 return -EINVAL;
796 }
797
798 if (str) {
799 priv->dot_clk = clk_get(&pdev->dev, str);
800 if (IS_ERR(priv->dot_clk)) {
801 dev_err(&pdev->dev, "cannot get dot clock %s\n", str);
802 return PTR_ERR(priv->dot_clk);
803 }
804 }
805
806 /* Runtime PM support involves two step for this driver:
807 * 1) Enable Runtime PM
808 * 2) Force Runtime PM Resume since hardware is accessed from probe()
809 */
810 priv->dev = &pdev->dev;
811 pm_runtime_enable(priv->dev);
812 pm_runtime_resume(priv->dev);
813 return 0;
814 }
815
816 static int sh_mobile_lcdc_setcolreg(u_int regno,
817 u_int red, u_int green, u_int blue,
818 u_int transp, struct fb_info *info)
819 {
820 u32 *palette = info->pseudo_palette;
821
822 if (regno >= PALETTE_NR)
823 return -EINVAL;
824
825 /* only FB_VISUAL_TRUECOLOR supported */
826
827 red >>= 16 - info->var.red.length;
828 green >>= 16 - info->var.green.length;
829 blue >>= 16 - info->var.blue.length;
830 transp >>= 16 - info->var.transp.length;
831
832 palette[regno] = (red << info->var.red.offset) |
833 (green << info->var.green.offset) |
834 (blue << info->var.blue.offset) |
835 (transp << info->var.transp.offset);
836
837 return 0;
838 }
839
840 static struct fb_fix_screeninfo sh_mobile_lcdc_fix = {
841 .id = "SH Mobile LCDC",
842 .type = FB_TYPE_PACKED_PIXELS,
843 .visual = FB_VISUAL_TRUECOLOR,
844 .accel = FB_ACCEL_NONE,
845 .xpanstep = 0,
846 .ypanstep = 1,
847 .ywrapstep = 0,
848 };
849
850 static void sh_mobile_lcdc_fillrect(struct fb_info *info,
851 const struct fb_fillrect *rect)
852 {
853 sys_fillrect(info, rect);
854 sh_mobile_lcdc_deferred_io_touch(info);
855 }
856
857 static void sh_mobile_lcdc_copyarea(struct fb_info *info,
858 const struct fb_copyarea *area)
859 {
860 sys_copyarea(info, area);
861 sh_mobile_lcdc_deferred_io_touch(info);
862 }
863
864 static void sh_mobile_lcdc_imageblit(struct fb_info *info,
865 const struct fb_image *image)
866 {
867 sys_imageblit(info, image);
868 sh_mobile_lcdc_deferred_io_touch(info);
869 }
870
871 static int sh_mobile_fb_pan_display(struct fb_var_screeninfo *var,
872 struct fb_info *info)
873 {
874 struct sh_mobile_lcdc_chan *ch = info->par;
875 struct sh_mobile_lcdc_priv *priv = ch->lcdc;
876 unsigned long ldrcntr;
877 unsigned long new_pan_offset;
878 unsigned long base_addr_y, base_addr_c;
879 unsigned long c_offset;
880
881 if (!info->var.nonstd)
882 new_pan_offset = var->yoffset * info->fix.line_length
883 + var->xoffset * (info->var.bits_per_pixel / 8);
884 else
885 new_pan_offset = var->yoffset * info->fix.line_length
886 + var->xoffset;
887
888 if (new_pan_offset == ch->pan_offset)
889 return 0; /* No change, do nothing */
890
891 ldrcntr = lcdc_read(priv, _LDRCNTR);
892
893 /* Set the source address for the next refresh */
894 base_addr_y = ch->dma_handle + new_pan_offset;
895 if (info->var.nonstd) {
896 /* Set y offset */
897 c_offset = var->yoffset * info->fix.line_length
898 * (info->var.bits_per_pixel - 8) / 8;
899 base_addr_c = ch->dma_handle
900 + info->var.xres * info->var.yres_virtual
901 + c_offset;
902 /* Set x offset */
903 if (info->var.bits_per_pixel == 24)
904 base_addr_c += 2 * var->xoffset;
905 else
906 base_addr_c += var->xoffset;
907 }
908
909 if (ch->meram_enabled) {
910 struct sh_mobile_meram_cfg *cfg;
911 struct sh_mobile_meram_info *mdev;
912 int ret;
913
914 cfg = ch->cfg.meram_cfg;
915 mdev = priv->meram_dev;
916 ret = mdev->ops->meram_update(mdev, cfg,
917 base_addr_y, base_addr_c,
918 &base_addr_y, &base_addr_c);
919 if (ret)
920 return ret;
921 }
922
923 ch->base_addr_y = base_addr_y;
924 ch->base_addr_c = base_addr_c;
925
926 lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y);
927 if (info->var.nonstd)
928 lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c);
929
930 if (lcdc_chan_is_sublcd(ch))
931 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
932 else
933 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS);
934
935 ch->pan_offset = new_pan_offset;
936
937 sh_mobile_lcdc_deferred_io_touch(info);
938
939 return 0;
940 }
941
942 static int sh_mobile_wait_for_vsync(struct fb_info *info)
943 {
944 struct sh_mobile_lcdc_chan *ch = info->par;
945 unsigned long ldintr;
946 int ret;
947
948 /* Enable VSync End interrupt and be careful not to acknowledge any
949 * pending interrupt.
950 */
951 ldintr = lcdc_read(ch->lcdc, _LDINTR);
952 ldintr |= LDINTR_VEE | LDINTR_STATUS_MASK;
953 lcdc_write(ch->lcdc, _LDINTR, ldintr);
954
955 ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion,
956 msecs_to_jiffies(100));
957 if (!ret)
958 return -ETIMEDOUT;
959
960 return 0;
961 }
962
963 static int sh_mobile_ioctl(struct fb_info *info, unsigned int cmd,
964 unsigned long arg)
965 {
966 int retval;
967
968 switch (cmd) {
969 case FBIO_WAITFORVSYNC:
970 retval = sh_mobile_wait_for_vsync(info);
971 break;
972
973 default:
974 retval = -ENOIOCTLCMD;
975 break;
976 }
977 return retval;
978 }
979
980 static void sh_mobile_fb_reconfig(struct fb_info *info)
981 {
982 struct sh_mobile_lcdc_chan *ch = info->par;
983 struct fb_videomode mode1, mode2;
984 struct fb_event event;
985 int evnt = FB_EVENT_MODE_CHANGE_ALL;
986
987 if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par))
988 /* More framebuffer users are active */
989 return;
990
991 fb_var_to_videomode(&mode1, &ch->display_var);
992 fb_var_to_videomode(&mode2, &info->var);
993
994 if (fb_mode_is_equal(&mode1, &mode2))
995 return;
996
997 /* Display has been re-plugged, framebuffer is free now, reconfigure */
998 if (fb_set_var(info, &ch->display_var) < 0)
999 /* Couldn't reconfigure, hopefully, can continue as before */
1000 return;
1001
1002 /*
1003 * fb_set_var() calls the notifier change internally, only if
1004 * FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a
1005 * user event, we have to call the chain ourselves.
1006 */
1007 event.info = info;
1008 event.data = &mode1;
1009 fb_notifier_call_chain(evnt, &event);
1010 }
1011
1012 /*
1013 * Locking: both .fb_release() and .fb_open() are called with info->lock held if
1014 * user == 1, or with console sem held, if user == 0.
1015 */
1016 static int sh_mobile_release(struct fb_info *info, int user)
1017 {
1018 struct sh_mobile_lcdc_chan *ch = info->par;
1019
1020 mutex_lock(&ch->open_lock);
1021 dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1022
1023 ch->use_count--;
1024
1025 /* Nothing to reconfigure, when called from fbcon */
1026 if (user) {
1027 console_lock();
1028 sh_mobile_fb_reconfig(info);
1029 console_unlock();
1030 }
1031
1032 mutex_unlock(&ch->open_lock);
1033
1034 return 0;
1035 }
1036
1037 static int sh_mobile_open(struct fb_info *info, int user)
1038 {
1039 struct sh_mobile_lcdc_chan *ch = info->par;
1040
1041 mutex_lock(&ch->open_lock);
1042 ch->use_count++;
1043
1044 dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1045 mutex_unlock(&ch->open_lock);
1046
1047 return 0;
1048 }
1049
1050 static int sh_mobile_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
1051 {
1052 struct sh_mobile_lcdc_chan *ch = info->par;
1053 struct sh_mobile_lcdc_priv *p = ch->lcdc;
1054 unsigned int best_dist = (unsigned int)-1;
1055 unsigned int best_xres = 0;
1056 unsigned int best_yres = 0;
1057 unsigned int i;
1058
1059 if (var->xres > MAX_XRES || var->yres > MAX_YRES)
1060 return -EINVAL;
1061
1062 /* If board code provides us with a list of available modes, make sure
1063 * we use one of them. Find the mode closest to the requested one. The
1064 * distance between two modes is defined as the size of the
1065 * non-overlapping parts of the two rectangles.
1066 */
1067 for (i = 0; i < ch->cfg.num_cfg; ++i) {
1068 const struct fb_videomode *mode = &ch->cfg.lcd_cfg[i];
1069 unsigned int dist;
1070
1071 /* We can only round up. */
1072 if (var->xres > mode->xres || var->yres > mode->yres)
1073 continue;
1074
1075 dist = var->xres * var->yres + mode->xres * mode->yres
1076 - 2 * min(var->xres, mode->xres)
1077 * min(var->yres, mode->yres);
1078
1079 if (dist < best_dist) {
1080 best_xres = mode->xres;
1081 best_yres = mode->yres;
1082 best_dist = dist;
1083 }
1084 }
1085
1086 /* If no available mode can be used, return an error. */
1087 if (ch->cfg.num_cfg != 0) {
1088 if (best_dist == (unsigned int)-1)
1089 return -EINVAL;
1090
1091 var->xres = best_xres;
1092 var->yres = best_yres;
1093 }
1094
1095 /* Make sure the virtual resolution is at least as big as the visible
1096 * resolution.
1097 */
1098 if (var->xres_virtual < var->xres)
1099 var->xres_virtual = var->xres;
1100 if (var->yres_virtual < var->yres)
1101 var->yres_virtual = var->yres;
1102
1103 if (var->bits_per_pixel <= 16) { /* RGB 565 */
1104 var->bits_per_pixel = 16;
1105 var->red.offset = 11;
1106 var->red.length = 5;
1107 var->green.offset = 5;
1108 var->green.length = 6;
1109 var->blue.offset = 0;
1110 var->blue.length = 5;
1111 var->transp.offset = 0;
1112 var->transp.length = 0;
1113 } else if (var->bits_per_pixel <= 24) { /* RGB 888 */
1114 var->bits_per_pixel = 24;
1115 var->red.offset = 16;
1116 var->red.length = 8;
1117 var->green.offset = 8;
1118 var->green.length = 8;
1119 var->blue.offset = 0;
1120 var->blue.length = 8;
1121 var->transp.offset = 0;
1122 var->transp.length = 0;
1123 } else if (var->bits_per_pixel <= 32) { /* RGBA 888 */
1124 var->bits_per_pixel = 32;
1125 var->red.offset = 16;
1126 var->red.length = 8;
1127 var->green.offset = 8;
1128 var->green.length = 8;
1129 var->blue.offset = 0;
1130 var->blue.length = 8;
1131 var->transp.offset = 24;
1132 var->transp.length = 8;
1133 } else
1134 return -EINVAL;
1135
1136 var->red.msb_right = 0;
1137 var->green.msb_right = 0;
1138 var->blue.msb_right = 0;
1139 var->transp.msb_right = 0;
1140
1141 /* Make sure we don't exceed our allocated memory. */
1142 if (var->xres_virtual * var->yres_virtual * var->bits_per_pixel / 8 >
1143 info->fix.smem_len)
1144 return -EINVAL;
1145
1146 /* only accept the forced_bpp for dual channel configurations */
1147 if (p->forced_bpp && p->forced_bpp != var->bits_per_pixel)
1148 return -EINVAL;
1149
1150 return 0;
1151 }
1152
1153 static int sh_mobile_set_par(struct fb_info *info)
1154 {
1155 struct sh_mobile_lcdc_chan *ch = info->par;
1156 u32 line_length = info->fix.line_length;
1157 int ret;
1158
1159 sh_mobile_lcdc_stop(ch->lcdc);
1160
1161 if (info->var.nonstd)
1162 info->fix.line_length = info->var.xres;
1163 else
1164 info->fix.line_length = info->var.xres
1165 * info->var.bits_per_pixel / 8;
1166
1167 ret = sh_mobile_lcdc_start(ch->lcdc);
1168 if (ret < 0) {
1169 dev_err(info->dev, "%s: unable to restart LCDC\n", __func__);
1170 info->fix.line_length = line_length;
1171 }
1172
1173 return ret;
1174 }
1175
1176 /*
1177 * Screen blanking. Behavior is as follows:
1178 * FB_BLANK_UNBLANK: screen unblanked, clocks enabled
1179 * FB_BLANK_NORMAL: screen blanked, clocks enabled
1180 * FB_BLANK_VSYNC,
1181 * FB_BLANK_HSYNC,
1182 * FB_BLANK_POWEROFF: screen blanked, clocks disabled
1183 */
1184 static int sh_mobile_lcdc_blank(int blank, struct fb_info *info)
1185 {
1186 struct sh_mobile_lcdc_chan *ch = info->par;
1187 struct sh_mobile_lcdc_priv *p = ch->lcdc;
1188
1189 /* blank the screen? */
1190 if (blank > FB_BLANK_UNBLANK && ch->blank_status == FB_BLANK_UNBLANK) {
1191 struct fb_fillrect rect = {
1192 .width = info->var.xres,
1193 .height = info->var.yres,
1194 };
1195 sh_mobile_lcdc_fillrect(info, &rect);
1196 }
1197 /* turn clocks on? */
1198 if (blank <= FB_BLANK_NORMAL && ch->blank_status > FB_BLANK_NORMAL) {
1199 sh_mobile_lcdc_clk_on(p);
1200 }
1201 /* turn clocks off? */
1202 if (blank > FB_BLANK_NORMAL && ch->blank_status <= FB_BLANK_NORMAL) {
1203 /* make sure the screen is updated with the black fill before
1204 * switching the clocks off. one vsync is not enough since
1205 * blanking may occur in the middle of a refresh. deferred io
1206 * mode will reenable the clocks and update the screen in time,
1207 * so it does not need this. */
1208 if (!info->fbdefio) {
1209 sh_mobile_wait_for_vsync(info);
1210 sh_mobile_wait_for_vsync(info);
1211 }
1212 sh_mobile_lcdc_clk_off(p);
1213 }
1214
1215 ch->blank_status = blank;
1216 return 0;
1217 }
1218
1219 static struct fb_ops sh_mobile_lcdc_ops = {
1220 .owner = THIS_MODULE,
1221 .fb_setcolreg = sh_mobile_lcdc_setcolreg,
1222 .fb_read = fb_sys_read,
1223 .fb_write = fb_sys_write,
1224 .fb_fillrect = sh_mobile_lcdc_fillrect,
1225 .fb_copyarea = sh_mobile_lcdc_copyarea,
1226 .fb_imageblit = sh_mobile_lcdc_imageblit,
1227 .fb_blank = sh_mobile_lcdc_blank,
1228 .fb_pan_display = sh_mobile_fb_pan_display,
1229 .fb_ioctl = sh_mobile_ioctl,
1230 .fb_open = sh_mobile_open,
1231 .fb_release = sh_mobile_release,
1232 .fb_check_var = sh_mobile_check_var,
1233 .fb_set_par = sh_mobile_set_par,
1234 };
1235
1236 static int sh_mobile_lcdc_update_bl(struct backlight_device *bdev)
1237 {
1238 struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
1239 struct sh_mobile_lcdc_board_cfg *cfg = &ch->cfg.board_cfg;
1240 int brightness = bdev->props.brightness;
1241
1242 if (bdev->props.power != FB_BLANK_UNBLANK ||
1243 bdev->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
1244 brightness = 0;
1245
1246 return cfg->set_brightness(cfg->board_data, brightness);
1247 }
1248
1249 static int sh_mobile_lcdc_get_brightness(struct backlight_device *bdev)
1250 {
1251 struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
1252 struct sh_mobile_lcdc_board_cfg *cfg = &ch->cfg.board_cfg;
1253
1254 return cfg->get_brightness(cfg->board_data);
1255 }
1256
1257 static int sh_mobile_lcdc_check_fb(struct backlight_device *bdev,
1258 struct fb_info *info)
1259 {
1260 return (info->bl_dev == bdev);
1261 }
1262
1263 static struct backlight_ops sh_mobile_lcdc_bl_ops = {
1264 .options = BL_CORE_SUSPENDRESUME,
1265 .update_status = sh_mobile_lcdc_update_bl,
1266 .get_brightness = sh_mobile_lcdc_get_brightness,
1267 .check_fb = sh_mobile_lcdc_check_fb,
1268 };
1269
1270 static struct backlight_device *sh_mobile_lcdc_bl_probe(struct device *parent,
1271 struct sh_mobile_lcdc_chan *ch)
1272 {
1273 struct backlight_device *bl;
1274
1275 bl = backlight_device_register(ch->cfg.bl_info.name, parent, ch,
1276 &sh_mobile_lcdc_bl_ops, NULL);
1277 if (IS_ERR(bl)) {
1278 dev_err(parent, "unable to register backlight device: %ld\n",
1279 PTR_ERR(bl));
1280 return NULL;
1281 }
1282
1283 bl->props.max_brightness = ch->cfg.bl_info.max_brightness;
1284 bl->props.brightness = bl->props.max_brightness;
1285 backlight_update_status(bl);
1286
1287 return bl;
1288 }
1289
1290 static void sh_mobile_lcdc_bl_remove(struct backlight_device *bdev)
1291 {
1292 backlight_device_unregister(bdev);
1293 }
1294
1295 static int sh_mobile_lcdc_suspend(struct device *dev)
1296 {
1297 struct platform_device *pdev = to_platform_device(dev);
1298
1299 sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
1300 return 0;
1301 }
1302
1303 static int sh_mobile_lcdc_resume(struct device *dev)
1304 {
1305 struct platform_device *pdev = to_platform_device(dev);
1306
1307 return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
1308 }
1309
1310 static int sh_mobile_lcdc_runtime_suspend(struct device *dev)
1311 {
1312 struct platform_device *pdev = to_platform_device(dev);
1313 struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
1314
1315 /* turn off LCDC hardware */
1316 lcdc_write(priv, _LDCNT1R, 0);
1317
1318 return 0;
1319 }
1320
1321 static int sh_mobile_lcdc_runtime_resume(struct device *dev)
1322 {
1323 struct platform_device *pdev = to_platform_device(dev);
1324 struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
1325
1326 __sh_mobile_lcdc_start(priv);
1327
1328 return 0;
1329 }
1330
1331 static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
1332 .suspend = sh_mobile_lcdc_suspend,
1333 .resume = sh_mobile_lcdc_resume,
1334 .runtime_suspend = sh_mobile_lcdc_runtime_suspend,
1335 .runtime_resume = sh_mobile_lcdc_runtime_resume,
1336 };
1337
1338 /* locking: called with info->lock held */
1339 static int sh_mobile_lcdc_notify(struct notifier_block *nb,
1340 unsigned long action, void *data)
1341 {
1342 struct fb_event *event = data;
1343 struct fb_info *info = event->info;
1344 struct sh_mobile_lcdc_chan *ch = info->par;
1345 struct sh_mobile_lcdc_board_cfg *board_cfg = &ch->cfg.board_cfg;
1346
1347 if (&ch->lcdc->notifier != nb)
1348 return NOTIFY_DONE;
1349
1350 dev_dbg(info->dev, "%s(): action = %lu, data = %p\n",
1351 __func__, action, event->data);
1352
1353 switch(action) {
1354 case FB_EVENT_SUSPEND:
1355 if (board_cfg->display_off && try_module_get(board_cfg->owner)) {
1356 board_cfg->display_off(board_cfg->board_data);
1357 module_put(board_cfg->owner);
1358 }
1359 sh_mobile_lcdc_stop(ch->lcdc);
1360 break;
1361 case FB_EVENT_RESUME:
1362 mutex_lock(&ch->open_lock);
1363 sh_mobile_fb_reconfig(info);
1364 mutex_unlock(&ch->open_lock);
1365
1366 /* HDMI must be enabled before LCDC configuration */
1367 if (board_cfg->display_on && try_module_get(board_cfg->owner)) {
1368 board_cfg->display_on(board_cfg->board_data, info);
1369 module_put(board_cfg->owner);
1370 }
1371
1372 sh_mobile_lcdc_start(ch->lcdc);
1373 }
1374
1375 return NOTIFY_OK;
1376 }
1377
1378 static int sh_mobile_lcdc_remove(struct platform_device *pdev)
1379 {
1380 struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
1381 struct fb_info *info;
1382 int i;
1383
1384 fb_unregister_client(&priv->notifier);
1385
1386 for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
1387 if (priv->ch[i].info && priv->ch[i].info->dev)
1388 unregister_framebuffer(priv->ch[i].info);
1389
1390 sh_mobile_lcdc_stop(priv);
1391
1392 for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
1393 info = priv->ch[i].info;
1394
1395 if (!info || !info->device)
1396 continue;
1397
1398 if (priv->ch[i].sglist)
1399 vfree(priv->ch[i].sglist);
1400
1401 if (info->screen_base)
1402 dma_free_coherent(&pdev->dev, info->fix.smem_len,
1403 info->screen_base,
1404 priv->ch[i].dma_handle);
1405 fb_dealloc_cmap(&info->cmap);
1406 framebuffer_release(info);
1407 }
1408
1409 for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
1410 if (priv->ch[i].bl)
1411 sh_mobile_lcdc_bl_remove(priv->ch[i].bl);
1412 }
1413
1414 if (priv->dot_clk)
1415 clk_put(priv->dot_clk);
1416
1417 if (priv->dev)
1418 pm_runtime_disable(priv->dev);
1419
1420 if (priv->base)
1421 iounmap(priv->base);
1422
1423 if (priv->irq)
1424 free_irq(priv->irq, priv);
1425 kfree(priv);
1426 return 0;
1427 }
1428
1429 static int __devinit sh_mobile_lcdc_channel_init(struct sh_mobile_lcdc_chan *ch,
1430 struct device *dev)
1431 {
1432 struct sh_mobile_lcdc_chan_cfg *cfg = &ch->cfg;
1433 const struct fb_videomode *max_mode;
1434 const struct fb_videomode *mode;
1435 struct fb_var_screeninfo *var;
1436 struct fb_info *info;
1437 unsigned int max_size;
1438 int num_cfg;
1439 void *buf;
1440 int ret;
1441 int i;
1442
1443 mutex_init(&ch->open_lock);
1444
1445 /* Allocate the frame buffer device. */
1446 ch->info = framebuffer_alloc(0, dev);
1447 if (!ch->info) {
1448 dev_err(dev, "unable to allocate fb_info\n");
1449 return -ENOMEM;
1450 }
1451
1452 info = ch->info;
1453 info->fbops = &sh_mobile_lcdc_ops;
1454 info->par = ch;
1455 info->pseudo_palette = &ch->pseudo_palette;
1456 info->flags = FBINFO_FLAG_DEFAULT;
1457
1458 /* Iterate through the modes to validate them and find the highest
1459 * resolution.
1460 */
1461 max_mode = NULL;
1462 max_size = 0;
1463
1464 for (i = 0, mode = cfg->lcd_cfg; i < cfg->num_cfg; i++, mode++) {
1465 unsigned int size = mode->yres * mode->xres;
1466
1467 /* NV12 buffers must have even number of lines */
1468 if ((cfg->nonstd) && cfg->bpp == 12 &&
1469 (mode->yres & 0x1)) {
1470 dev_err(dev, "yres must be multiple of 2 for YCbCr420 "
1471 "mode.\n");
1472 return -EINVAL;
1473 }
1474
1475 if (size > max_size) {
1476 max_mode = mode;
1477 max_size = size;
1478 }
1479 }
1480
1481 if (!max_size)
1482 max_size = MAX_XRES * MAX_YRES;
1483 else
1484 dev_dbg(dev, "Found largest videomode %ux%u\n",
1485 max_mode->xres, max_mode->yres);
1486
1487 /* Initialize fixed screen information. Restrict pan to 2 lines steps
1488 * for NV12.
1489 */
1490 info->fix = sh_mobile_lcdc_fix;
1491 info->fix.smem_len = max_size * 2 * cfg->bpp / 8;
1492 if (cfg->nonstd && cfg->bpp == 12)
1493 info->fix.ypanstep = 2;
1494
1495 /* Create the mode list. */
1496 if (cfg->lcd_cfg == NULL) {
1497 mode = &default_720p;
1498 num_cfg = 1;
1499 } else {
1500 mode = cfg->lcd_cfg;
1501 num_cfg = cfg->num_cfg;
1502 }
1503
1504 fb_videomode_to_modelist(mode, num_cfg, &info->modelist);
1505
1506 /* Initialize variable screen information using the first mode as
1507 * default. The default Y virtual resolution is twice the panel size to
1508 * allow for double-buffering.
1509 */
1510 var = &info->var;
1511 fb_videomode_to_var(var, mode);
1512 var->bits_per_pixel = cfg->bpp;
1513 var->width = cfg->lcd_size_cfg.width;
1514 var->height = cfg->lcd_size_cfg.height;
1515 var->yres_virtual = var->yres * 2;
1516 var->activate = FB_ACTIVATE_NOW;
1517
1518 ret = sh_mobile_check_var(var, info);
1519 if (ret)
1520 return ret;
1521
1522 /* Allocate frame buffer memory and color map. */
1523 buf = dma_alloc_coherent(dev, info->fix.smem_len, &ch->dma_handle,
1524 GFP_KERNEL);
1525 if (!buf) {
1526 dev_err(dev, "unable to allocate buffer\n");
1527 return -ENOMEM;
1528 }
1529
1530 ret = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
1531 if (ret < 0) {
1532 dev_err(dev, "unable to allocate cmap\n");
1533 dma_free_coherent(dev, info->fix.smem_len,
1534 buf, ch->dma_handle);
1535 return ret;
1536 }
1537
1538 info->fix.smem_start = ch->dma_handle;
1539 if (var->nonstd)
1540 info->fix.line_length = var->xres;
1541 else
1542 info->fix.line_length = var->xres * (cfg->bpp / 8);
1543
1544 info->screen_base = buf;
1545 info->device = dev;
1546 ch->display_var = *var;
1547
1548 return 0;
1549 }
1550
1551 static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev)
1552 {
1553 struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data;
1554 struct sh_mobile_lcdc_priv *priv;
1555 struct resource *res;
1556 int num_channels;
1557 int error;
1558 int i;
1559
1560 if (!pdata) {
1561 dev_err(&pdev->dev, "no platform data defined\n");
1562 return -EINVAL;
1563 }
1564
1565 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1566 i = platform_get_irq(pdev, 0);
1567 if (!res || i < 0) {
1568 dev_err(&pdev->dev, "cannot get platform resources\n");
1569 return -ENOENT;
1570 }
1571
1572 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
1573 if (!priv) {
1574 dev_err(&pdev->dev, "cannot allocate device data\n");
1575 return -ENOMEM;
1576 }
1577
1578 platform_set_drvdata(pdev, priv);
1579
1580 error = request_irq(i, sh_mobile_lcdc_irq, 0,
1581 dev_name(&pdev->dev), priv);
1582 if (error) {
1583 dev_err(&pdev->dev, "unable to request irq\n");
1584 goto err1;
1585 }
1586
1587 priv->irq = i;
1588 atomic_set(&priv->hw_usecnt, -1);
1589
1590 for (i = 0, num_channels = 0; i < ARRAY_SIZE(pdata->ch); i++) {
1591 struct sh_mobile_lcdc_chan *ch = priv->ch + num_channels;
1592
1593 ch->lcdc = priv;
1594 memcpy(&ch->cfg, &pdata->ch[i], sizeof(pdata->ch[i]));
1595
1596 error = sh_mobile_lcdc_check_interface(ch);
1597 if (error) {
1598 dev_err(&pdev->dev, "unsupported interface type\n");
1599 goto err1;
1600 }
1601 init_waitqueue_head(&ch->frame_end_wait);
1602 init_completion(&ch->vsync_completion);
1603 ch->pan_offset = 0;
1604
1605 /* probe the backlight is there is one defined */
1606 if (ch->cfg.bl_info.max_brightness)
1607 ch->bl = sh_mobile_lcdc_bl_probe(&pdev->dev, ch);
1608
1609 switch (pdata->ch[i].chan) {
1610 case LCDC_CHAN_MAINLCD:
1611 ch->enabled = LDCNT2R_ME;
1612 ch->reg_offs = lcdc_offs_mainlcd;
1613 num_channels++;
1614 break;
1615 case LCDC_CHAN_SUBLCD:
1616 ch->enabled = LDCNT2R_SE;
1617 ch->reg_offs = lcdc_offs_sublcd;
1618 num_channels++;
1619 break;
1620 }
1621 }
1622
1623 if (!num_channels) {
1624 dev_err(&pdev->dev, "no channels defined\n");
1625 error = -EINVAL;
1626 goto err1;
1627 }
1628
1629 /* for dual channel LCDC (MAIN + SUB) force shared bpp setting */
1630 if (num_channels == 2)
1631 priv->forced_bpp = pdata->ch[0].bpp;
1632
1633 priv->base = ioremap_nocache(res->start, resource_size(res));
1634 if (!priv->base)
1635 goto err1;
1636
1637 error = sh_mobile_lcdc_setup_clocks(pdev, pdata->clock_source, priv);
1638 if (error) {
1639 dev_err(&pdev->dev, "unable to setup clocks\n");
1640 goto err1;
1641 }
1642
1643 priv->meram_dev = pdata->meram_dev;
1644
1645 for (i = 0; i < num_channels; i++) {
1646 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
1647
1648 error = sh_mobile_lcdc_channel_init(ch, &pdev->dev);
1649 if (error)
1650 goto err1;
1651 }
1652
1653 error = sh_mobile_lcdc_start(priv);
1654 if (error) {
1655 dev_err(&pdev->dev, "unable to start hardware\n");
1656 goto err1;
1657 }
1658
1659 for (i = 0; i < num_channels; i++) {
1660 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
1661 struct fb_info *info = ch->info;
1662
1663 if (info->fbdefio) {
1664 ch->sglist = vmalloc(sizeof(struct scatterlist) *
1665 info->fix.smem_len >> PAGE_SHIFT);
1666 if (!ch->sglist) {
1667 dev_err(&pdev->dev, "cannot allocate sglist\n");
1668 goto err1;
1669 }
1670 }
1671
1672 info->bl_dev = ch->bl;
1673
1674 error = register_framebuffer(info);
1675 if (error < 0)
1676 goto err1;
1677
1678 dev_info(info->dev,
1679 "registered %s/%s as %dx%d %dbpp.\n",
1680 pdev->name,
1681 (ch->cfg.chan == LCDC_CHAN_MAINLCD) ?
1682 "mainlcd" : "sublcd",
1683 info->var.xres, info->var.yres,
1684 ch->cfg.bpp);
1685
1686 /* deferred io mode: disable clock to save power */
1687 if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED)
1688 sh_mobile_lcdc_clk_off(priv);
1689 }
1690
1691 /* Failure ignored */
1692 priv->notifier.notifier_call = sh_mobile_lcdc_notify;
1693 fb_register_client(&priv->notifier);
1694
1695 return 0;
1696 err1:
1697 sh_mobile_lcdc_remove(pdev);
1698
1699 return error;
1700 }
1701
1702 static struct platform_driver sh_mobile_lcdc_driver = {
1703 .driver = {
1704 .name = "sh_mobile_lcdc_fb",
1705 .owner = THIS_MODULE,
1706 .pm = &sh_mobile_lcdc_dev_pm_ops,
1707 },
1708 .probe = sh_mobile_lcdc_probe,
1709 .remove = sh_mobile_lcdc_remove,
1710 };
1711
1712 static int __init sh_mobile_lcdc_init(void)
1713 {
1714 return platform_driver_register(&sh_mobile_lcdc_driver);
1715 }
1716
1717 static void __exit sh_mobile_lcdc_exit(void)
1718 {
1719 platform_driver_unregister(&sh_mobile_lcdc_driver);
1720 }
1721
1722 module_init(sh_mobile_lcdc_init);
1723 module_exit(sh_mobile_lcdc_exit);
1724
1725 MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
1726 MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
1727 MODULE_LICENSE("GPL v2");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree