atomic: use <linux/atomic.h>
[linux-2.6.git] / drivers / video / sh_mobile_lcdcfb.c
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 <video/sh_mobile_lcdc.h>
27 #include <linux/atomic.h>
28
29 #include "sh_mobile_lcdcfb.h"
30 #include "sh_mobile_meram.h"
31
32 #define SIDE_B_OFFSET 0x1000
33 #define MIRROR_OFFSET 0x2000
34
35 /* shared registers */
36 #define _LDDCKR 0x410
37 #define _LDDCKSTPR 0x414
38 #define _LDINTR 0x468
39 #define _LDSR 0x46c
40 #define _LDCNT1R 0x470
41 #define _LDCNT2R 0x474
42 #define _LDRCNTR 0x478
43 #define _LDDDSR 0x47c
44 #define _LDDWD0R 0x800
45 #define _LDDRDR 0x840
46 #define _LDDWAR 0x900
47 #define _LDDRAR 0x904
48
49 /* shared registers and their order for context save/restore */
50 static int lcdc_shared_regs[] = {
51         _LDDCKR,
52         _LDDCKSTPR,
53         _LDINTR,
54         _LDDDSR,
55         _LDCNT1R,
56         _LDCNT2R,
57 };
58 #define NR_SHARED_REGS ARRAY_SIZE(lcdc_shared_regs)
59
60 #define MAX_XRES 1920
61 #define MAX_YRES 1080
62
63 static unsigned long lcdc_offs_mainlcd[NR_CH_REGS] = {
64         [LDDCKPAT1R] = 0x400,
65         [LDDCKPAT2R] = 0x404,
66         [LDMT1R] = 0x418,
67         [LDMT2R] = 0x41c,
68         [LDMT3R] = 0x420,
69         [LDDFR] = 0x424,
70         [LDSM1R] = 0x428,
71         [LDSM2R] = 0x42c,
72         [LDSA1R] = 0x430,
73         [LDSA2R] = 0x434,
74         [LDMLSR] = 0x438,
75         [LDHCNR] = 0x448,
76         [LDHSYNR] = 0x44c,
77         [LDVLNR] = 0x450,
78         [LDVSYNR] = 0x454,
79         [LDPMR] = 0x460,
80         [LDHAJR] = 0x4a0,
81 };
82
83 static unsigned long lcdc_offs_sublcd[NR_CH_REGS] = {
84         [LDDCKPAT1R] = 0x408,
85         [LDDCKPAT2R] = 0x40c,
86         [LDMT1R] = 0x600,
87         [LDMT2R] = 0x604,
88         [LDMT3R] = 0x608,
89         [LDDFR] = 0x60c,
90         [LDSM1R] = 0x610,
91         [LDSM2R] = 0x614,
92         [LDSA1R] = 0x618,
93         [LDMLSR] = 0x620,
94         [LDHCNR] = 0x624,
95         [LDHSYNR] = 0x628,
96         [LDVLNR] = 0x62c,
97         [LDVSYNR] = 0x630,
98         [LDPMR] = 0x63c,
99 };
100
101 #define START_LCDC      0x00000001
102 #define LCDC_RESET      0x00000100
103 #define DISPLAY_BEU     0x00000008
104 #define LCDC_ENABLE     0x00000001
105 #define LDINTR_FE       0x00000400
106 #define LDINTR_VSE      0x00000200
107 #define LDINTR_VEE      0x00000100
108 #define LDINTR_FS       0x00000004
109 #define LDINTR_VSS      0x00000002
110 #define LDINTR_VES      0x00000001
111 #define LDRCNTR_SRS     0x00020000
112 #define LDRCNTR_SRC     0x00010000
113 #define LDRCNTR_MRS     0x00000002
114 #define LDRCNTR_MRC     0x00000001
115 #define LDSR_MRS        0x00000100
116
117 static const struct fb_videomode default_720p = {
118         .name = "HDMI 720p",
119         .xres = 1280,
120         .yres = 720,
121
122         .left_margin = 220,
123         .right_margin = 110,
124         .hsync_len = 40,
125
126         .upper_margin = 20,
127         .lower_margin = 5,
128         .vsync_len = 5,
129
130         .pixclock = 13468,
131         .refresh = 60,
132         .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT,
133 };
134
135 struct sh_mobile_lcdc_priv {
136         void __iomem *base;
137         int irq;
138         atomic_t hw_usecnt;
139         struct device *dev;
140         struct clk *dot_clk;
141         unsigned long lddckr;
142         struct sh_mobile_lcdc_chan ch[2];
143         struct notifier_block notifier;
144         unsigned long saved_shared_regs[NR_SHARED_REGS];
145         int started;
146         int forced_bpp; /* 2 channel LCDC must share bpp setting */
147         struct sh_mobile_meram_info *meram_dev;
148 };
149
150 static bool banked(int reg_nr)
151 {
152         switch (reg_nr) {
153         case LDMT1R:
154         case LDMT2R:
155         case LDMT3R:
156         case LDDFR:
157         case LDSM1R:
158         case LDSA1R:
159         case LDSA2R:
160         case LDMLSR:
161         case LDHCNR:
162         case LDHSYNR:
163         case LDVLNR:
164         case LDVSYNR:
165                 return true;
166         }
167         return false;
168 }
169
170 static void lcdc_write_chan(struct sh_mobile_lcdc_chan *chan,
171                             int reg_nr, unsigned long data)
172 {
173         iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr]);
174         if (banked(reg_nr))
175                 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
176                           SIDE_B_OFFSET);
177 }
178
179 static void lcdc_write_chan_mirror(struct sh_mobile_lcdc_chan *chan,
180                             int reg_nr, unsigned long data)
181 {
182         iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
183                   MIRROR_OFFSET);
184 }
185
186 static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan *chan,
187                                     int reg_nr)
188 {
189         return ioread32(chan->lcdc->base + chan->reg_offs[reg_nr]);
190 }
191
192 static void lcdc_write(struct sh_mobile_lcdc_priv *priv,
193                        unsigned long reg_offs, unsigned long data)
194 {
195         iowrite32(data, priv->base + reg_offs);
196 }
197
198 static unsigned long lcdc_read(struct sh_mobile_lcdc_priv *priv,
199                                unsigned long reg_offs)
200 {
201         return ioread32(priv->base + reg_offs);
202 }
203
204 static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv,
205                           unsigned long reg_offs,
206                           unsigned long mask, unsigned long until)
207 {
208         while ((lcdc_read(priv, reg_offs) & mask) != until)
209                 cpu_relax();
210 }
211
212 static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan)
213 {
214         return chan->cfg.chan == LCDC_CHAN_SUBLCD;
215 }
216
217 static void lcdc_sys_write_index(void *handle, unsigned long data)
218 {
219         struct sh_mobile_lcdc_chan *ch = handle;
220
221         lcdc_write(ch->lcdc, _LDDWD0R, data | 0x10000000);
222         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
223         lcdc_write(ch->lcdc, _LDDWAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
224         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
225 }
226
227 static void lcdc_sys_write_data(void *handle, unsigned long data)
228 {
229         struct sh_mobile_lcdc_chan *ch = handle;
230
231         lcdc_write(ch->lcdc, _LDDWD0R, data | 0x11000000);
232         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
233         lcdc_write(ch->lcdc, _LDDWAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
234         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
235 }
236
237 static unsigned long lcdc_sys_read_data(void *handle)
238 {
239         struct sh_mobile_lcdc_chan *ch = handle;
240
241         lcdc_write(ch->lcdc, _LDDRDR, 0x01000000);
242         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
243         lcdc_write(ch->lcdc, _LDDRAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
244         udelay(1);
245         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
246
247         return lcdc_read(ch->lcdc, _LDDRDR) & 0x3ffff;
248 }
249
250 struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = {
251         lcdc_sys_write_index,
252         lcdc_sys_write_data,
253         lcdc_sys_read_data,
254 };
255
256 static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv)
257 {
258         if (atomic_inc_and_test(&priv->hw_usecnt)) {
259                 pm_runtime_get_sync(priv->dev);
260                 if (priv->dot_clk)
261                         clk_enable(priv->dot_clk);
262         }
263 }
264
265 static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv)
266 {
267         if (atomic_sub_return(1, &priv->hw_usecnt) == -1) {
268                 if (priv->dot_clk)
269                         clk_disable(priv->dot_clk);
270                 pm_runtime_put(priv->dev);
271         }
272 }
273
274 static int sh_mobile_lcdc_sginit(struct fb_info *info,
275                                   struct list_head *pagelist)
276 {
277         struct sh_mobile_lcdc_chan *ch = info->par;
278         unsigned int nr_pages_max = info->fix.smem_len >> PAGE_SHIFT;
279         struct page *page;
280         int nr_pages = 0;
281
282         sg_init_table(ch->sglist, nr_pages_max);
283
284         list_for_each_entry(page, pagelist, lru)
285                 sg_set_page(&ch->sglist[nr_pages++], page, PAGE_SIZE, 0);
286
287         return nr_pages;
288 }
289
290 static void sh_mobile_lcdc_deferred_io(struct fb_info *info,
291                                        struct list_head *pagelist)
292 {
293         struct sh_mobile_lcdc_chan *ch = info->par;
294         struct sh_mobile_lcdc_board_cfg *bcfg = &ch->cfg.board_cfg;
295
296         /* enable clocks before accessing hardware */
297         sh_mobile_lcdc_clk_on(ch->lcdc);
298
299         /*
300          * It's possible to get here without anything on the pagelist via
301          * sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync()
302          * invocation. In the former case, the acceleration routines are
303          * stepped in to when using the framebuffer console causing the
304          * workqueue to be scheduled without any dirty pages on the list.
305          *
306          * Despite this, a panel update is still needed given that the
307          * acceleration routines have their own methods for writing in
308          * that still need to be updated.
309          *
310          * The fsync() and empty pagelist case could be optimized for,
311          * but we don't bother, as any application exhibiting such
312          * behaviour is fundamentally broken anyways.
313          */
314         if (!list_empty(pagelist)) {
315                 unsigned int nr_pages = sh_mobile_lcdc_sginit(info, pagelist);
316
317                 /* trigger panel update */
318                 dma_map_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
319                 if (bcfg->start_transfer)
320                         bcfg->start_transfer(bcfg->board_data, ch,
321                                              &sh_mobile_lcdc_sys_bus_ops);
322                 lcdc_write_chan(ch, LDSM2R, 1);
323                 dma_unmap_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
324         } else {
325                 if (bcfg->start_transfer)
326                         bcfg->start_transfer(bcfg->board_data, ch,
327                                              &sh_mobile_lcdc_sys_bus_ops);
328                 lcdc_write_chan(ch, LDSM2R, 1);
329         }
330 }
331
332 static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info)
333 {
334         struct fb_deferred_io *fbdefio = info->fbdefio;
335
336         if (fbdefio)
337                 schedule_delayed_work(&info->deferred_work, fbdefio->delay);
338 }
339
340 static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
341 {
342         struct sh_mobile_lcdc_priv *priv = data;
343         struct sh_mobile_lcdc_chan *ch;
344         unsigned long tmp;
345         unsigned long ldintr;
346         int is_sub;
347         int k;
348
349         /* acknowledge interrupt */
350         ldintr = tmp = lcdc_read(priv, _LDINTR);
351         /*
352          * disable further VSYNC End IRQs, preserve all other enabled IRQs,
353          * write 0 to bits 0-6 to ack all triggered IRQs.
354          */
355         tmp &= 0xffffff00 & ~LDINTR_VEE;
356         lcdc_write(priv, _LDINTR, tmp);
357
358         /* figure out if this interrupt is for main or sub lcd */
359         is_sub = (lcdc_read(priv, _LDSR) & (1 << 10)) ? 1 : 0;
360
361         /* wake up channel and disable clocks */
362         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
363                 ch = &priv->ch[k];
364
365                 if (!ch->enabled)
366                         continue;
367
368                 /* Frame Start */
369                 if (ldintr & LDINTR_FS) {
370                         if (is_sub == lcdc_chan_is_sublcd(ch)) {
371                                 ch->frame_end = 1;
372                                 wake_up(&ch->frame_end_wait);
373
374                                 sh_mobile_lcdc_clk_off(priv);
375                         }
376                 }
377
378                 /* VSYNC End */
379                 if (ldintr & LDINTR_VES)
380                         complete(&ch->vsync_completion);
381         }
382
383         return IRQ_HANDLED;
384 }
385
386 static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv,
387                                       int start)
388 {
389         unsigned long tmp = lcdc_read(priv, _LDCNT2R);
390         int k;
391
392         /* start or stop the lcdc */
393         if (start)
394                 lcdc_write(priv, _LDCNT2R, tmp | START_LCDC);
395         else
396                 lcdc_write(priv, _LDCNT2R, tmp & ~START_LCDC);
397
398         /* wait until power is applied/stopped on all channels */
399         for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
400                 if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled)
401                         while (1) {
402                                 tmp = lcdc_read_chan(&priv->ch[k], LDPMR) & 3;
403                                 if (start && tmp == 3)
404                                         break;
405                                 if (!start && tmp == 0)
406                                         break;
407                                 cpu_relax();
408                         }
409
410         if (!start)
411                 lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */
412 }
413
414 static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch)
415 {
416         struct fb_var_screeninfo *var = &ch->info->var, *display_var = &ch->display_var;
417         unsigned long h_total, hsync_pos, display_h_total;
418         u32 tmp;
419
420         tmp = ch->ldmt1r_value;
421         tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : 1 << 28;
422         tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : 1 << 27;
423         tmp |= (ch->cfg.flags & LCDC_FLAGS_DWPOL) ? 1 << 26 : 0;
424         tmp |= (ch->cfg.flags & LCDC_FLAGS_DIPOL) ? 1 << 25 : 0;
425         tmp |= (ch->cfg.flags & LCDC_FLAGS_DAPOL) ? 1 << 24 : 0;
426         tmp |= (ch->cfg.flags & LCDC_FLAGS_HSCNT) ? 1 << 17 : 0;
427         tmp |= (ch->cfg.flags & LCDC_FLAGS_DWCNT) ? 1 << 16 : 0;
428         lcdc_write_chan(ch, LDMT1R, tmp);
429
430         /* setup SYS bus */
431         lcdc_write_chan(ch, LDMT2R, ch->cfg.sys_bus_cfg.ldmt2r);
432         lcdc_write_chan(ch, LDMT3R, ch->cfg.sys_bus_cfg.ldmt3r);
433
434         /* horizontal configuration */
435         h_total = display_var->xres + display_var->hsync_len +
436                 display_var->left_margin + display_var->right_margin;
437         tmp = h_total / 8; /* HTCN */
438         tmp |= (min(display_var->xres, var->xres) / 8) << 16; /* HDCN */
439         lcdc_write_chan(ch, LDHCNR, tmp);
440
441         hsync_pos = display_var->xres + display_var->right_margin;
442         tmp = hsync_pos / 8; /* HSYNP */
443         tmp |= (display_var->hsync_len / 8) << 16; /* HSYNW */
444         lcdc_write_chan(ch, LDHSYNR, tmp);
445
446         /* vertical configuration */
447         tmp = display_var->yres + display_var->vsync_len +
448                 display_var->upper_margin + display_var->lower_margin; /* VTLN */
449         tmp |= min(display_var->yres, var->yres) << 16; /* VDLN */
450         lcdc_write_chan(ch, LDVLNR, tmp);
451
452         tmp = display_var->yres + display_var->lower_margin; /* VSYNP */
453         tmp |= display_var->vsync_len << 16; /* VSYNW */
454         lcdc_write_chan(ch, LDVSYNR, tmp);
455
456         /* Adjust horizontal synchronisation for HDMI */
457         display_h_total = display_var->xres + display_var->hsync_len +
458                 display_var->left_margin + display_var->right_margin;
459         tmp = ((display_var->xres & 7) << 24) |
460                 ((display_h_total & 7) << 16) |
461                 ((display_var->hsync_len & 7) << 8) |
462                 hsync_pos;
463         lcdc_write_chan(ch, LDHAJR, tmp);
464 }
465
466 static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
467 {
468         struct sh_mobile_lcdc_chan *ch;
469         struct sh_mobile_lcdc_board_cfg *board_cfg;
470         unsigned long tmp;
471         int bpp = 0;
472         unsigned long ldddsr;
473         int k, m, ret;
474
475         /* enable clocks before accessing the hardware */
476         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
477                 if (priv->ch[k].enabled) {
478                         sh_mobile_lcdc_clk_on(priv);
479                         if (!bpp)
480                                 bpp = priv->ch[k].info->var.bits_per_pixel;
481                 }
482         }
483
484         /* reset */
485         lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LCDC_RESET);
486         lcdc_wait_bit(priv, _LDCNT2R, LCDC_RESET, 0);
487
488         /* enable LCDC channels */
489         tmp = lcdc_read(priv, _LDCNT2R);
490         tmp |= priv->ch[0].enabled;
491         tmp |= priv->ch[1].enabled;
492         lcdc_write(priv, _LDCNT2R, tmp);
493
494         /* read data from external memory, avoid using the BEU for now */
495         lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) & ~DISPLAY_BEU);
496
497         /* stop the lcdc first */
498         sh_mobile_lcdc_start_stop(priv, 0);
499
500         /* configure clocks */
501         tmp = priv->lddckr;
502         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
503                 ch = &priv->ch[k];
504
505                 if (!priv->ch[k].enabled)
506                         continue;
507
508                 m = ch->cfg.clock_divider;
509                 if (!m)
510                         continue;
511
512                 if (m == 1)
513                         m = 1 << 6;
514                 tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
515
516                 /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider denominator */
517                 lcdc_write_chan(ch, LDDCKPAT1R, 0);
518                 lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1);
519         }
520
521         lcdc_write(priv, _LDDCKR, tmp);
522
523         /* start dotclock again */
524         lcdc_write(priv, _LDDCKSTPR, 0);
525         lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0);
526
527         /* interrupts are disabled to begin with */
528         lcdc_write(priv, _LDINTR, 0);
529
530         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
531                 ch = &priv->ch[k];
532
533                 if (!ch->enabled)
534                         continue;
535
536                 sh_mobile_lcdc_geometry(ch);
537
538                 /* power supply */
539                 lcdc_write_chan(ch, LDPMR, 0);
540
541                 board_cfg = &ch->cfg.board_cfg;
542                 if (board_cfg->setup_sys) {
543                         ret = board_cfg->setup_sys(board_cfg->board_data,
544                                                 ch, &sh_mobile_lcdc_sys_bus_ops);
545                         if (ret)
546                                 return ret;
547                 }
548         }
549
550         /* word and long word swap */
551         ldddsr = lcdc_read(priv, _LDDDSR);
552         if  (priv->ch[0].info->var.nonstd)
553                 lcdc_write(priv, _LDDDSR, ldddsr | 7);
554         else {
555                 switch (bpp) {
556                 case 16:
557                         lcdc_write(priv, _LDDDSR, ldddsr | 6);
558                         break;
559                 case 24:
560                         lcdc_write(priv, _LDDDSR, ldddsr | 7);
561                         break;
562                 case 32:
563                         lcdc_write(priv, _LDDDSR, ldddsr | 4);
564                         break;
565                 }
566         }
567
568         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
569                 unsigned long base_addr_y;
570                 unsigned long base_addr_c = 0;
571                 int pitch;
572                 ch = &priv->ch[k];
573
574                 if (!priv->ch[k].enabled)
575                         continue;
576
577                 /* set bpp format in PKF[4:0] */
578                 tmp = lcdc_read_chan(ch, LDDFR);
579                 tmp &= ~0x0003031f;
580                 if (ch->info->var.nonstd) {
581                         tmp |= (ch->info->var.nonstd << 16);
582                         switch (ch->info->var.bits_per_pixel) {
583                         case 12:
584                                 break;
585                         case 16:
586                                 tmp |= (0x1 << 8);
587                                 break;
588                         case 24:
589                                 tmp |= (0x2 << 8);
590                                 break;
591                         }
592                 } else {
593                         switch (ch->info->var.bits_per_pixel) {
594                         case 16:
595                                 tmp |= 0x03;
596                                 break;
597                         case 24:
598                                 tmp |= 0x0b;
599                                 break;
600                         case 32:
601                                 break;
602                         }
603                 }
604                 lcdc_write_chan(ch, LDDFR, tmp);
605
606                 base_addr_y = ch->info->fix.smem_start;
607                 base_addr_c = base_addr_y +
608                                 ch->info->var.xres *
609                                 ch->info->var.yres_virtual;
610                 pitch = ch->info->fix.line_length;
611
612                 /* test if we can enable meram */
613                 if (ch->cfg.meram_cfg && priv->meram_dev &&
614                                 priv->meram_dev->ops) {
615                         struct sh_mobile_meram_cfg *cfg;
616                         struct sh_mobile_meram_info *mdev;
617                         unsigned long icb_addr_y, icb_addr_c;
618                         int icb_pitch;
619                         int pf;
620
621                         cfg = ch->cfg.meram_cfg;
622                         mdev = priv->meram_dev;
623                         /* we need to de-init configured ICBs before we
624                          * we can re-initialize them.
625                          */
626                         if (ch->meram_enabled)
627                                 mdev->ops->meram_unregister(mdev, cfg);
628
629                         ch->meram_enabled = 0;
630
631                         if (ch->info->var.nonstd) {
632                                 if (ch->info->var.bits_per_pixel == 24)
633                                         pf = SH_MOBILE_MERAM_PF_NV24;
634                                 else
635                                         pf = SH_MOBILE_MERAM_PF_NV;
636                         } else {
637                                 pf = SH_MOBILE_MERAM_PF_RGB;
638                         }
639
640                         ret = mdev->ops->meram_register(mdev, cfg, pitch,
641                                                 ch->info->var.yres,
642                                                 pf,
643                                                 base_addr_y,
644                                                 base_addr_c,
645                                                 &icb_addr_y,
646                                                 &icb_addr_c,
647                                                 &icb_pitch);
648                         if (!ret)  {
649                                 /* set LDSA1R value */
650                                 base_addr_y = icb_addr_y;
651                                 pitch = icb_pitch;
652
653                                 /* set LDSA2R value if required */
654                                 if (base_addr_c)
655                                         base_addr_c = icb_addr_c;
656
657                                 ch->meram_enabled = 1;
658                         }
659                 }
660
661                 /* point out our frame buffer */
662                 lcdc_write_chan(ch, LDSA1R, base_addr_y);
663                 if (ch->info->var.nonstd)
664                         lcdc_write_chan(ch, LDSA2R, base_addr_c);
665
666                 /* set line size */
667                 lcdc_write_chan(ch, LDMLSR, pitch);
668
669                 /* setup deferred io if SYS bus */
670                 tmp = ch->cfg.sys_bus_cfg.deferred_io_msec;
671                 if (ch->ldmt1r_value & (1 << 12) && tmp) {
672                         ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
673                         ch->defio.delay = msecs_to_jiffies(tmp);
674                         ch->info->fbdefio = &ch->defio;
675                         fb_deferred_io_init(ch->info);
676
677                         /* one-shot mode */
678                         lcdc_write_chan(ch, LDSM1R, 1);
679
680                         /* enable "Frame End Interrupt Enable" bit */
681                         lcdc_write(priv, _LDINTR, LDINTR_FE);
682
683                 } else {
684                         /* continuous read mode */
685                         lcdc_write_chan(ch, LDSM1R, 0);
686                 }
687         }
688
689         /* display output */
690         lcdc_write(priv, _LDCNT1R, LCDC_ENABLE);
691
692         /* start the lcdc */
693         sh_mobile_lcdc_start_stop(priv, 1);
694         priv->started = 1;
695
696         /* tell the board code to enable the panel */
697         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
698                 ch = &priv->ch[k];
699                 if (!ch->enabled)
700                         continue;
701
702                 board_cfg = &ch->cfg.board_cfg;
703                 if (board_cfg->display_on && try_module_get(board_cfg->owner)) {
704                         board_cfg->display_on(board_cfg->board_data, ch->info);
705                         module_put(board_cfg->owner);
706                 }
707
708                 if (ch->bl) {
709                         ch->bl->props.power = FB_BLANK_UNBLANK;
710                         backlight_update_status(ch->bl);
711                 }
712         }
713
714         return 0;
715 }
716
717 static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
718 {
719         struct sh_mobile_lcdc_chan *ch;
720         struct sh_mobile_lcdc_board_cfg *board_cfg;
721         int k;
722
723         /* clean up deferred io and ask board code to disable panel */
724         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
725                 ch = &priv->ch[k];
726                 if (!ch->enabled)
727                         continue;
728
729                 /* deferred io mode:
730                  * flush frame, and wait for frame end interrupt
731                  * clean up deferred io and enable clock
732                  */
733                 if (ch->info && ch->info->fbdefio) {
734                         ch->frame_end = 0;
735                         schedule_delayed_work(&ch->info->deferred_work, 0);
736                         wait_event(ch->frame_end_wait, ch->frame_end);
737                         fb_deferred_io_cleanup(ch->info);
738                         ch->info->fbdefio = NULL;
739                         sh_mobile_lcdc_clk_on(priv);
740                 }
741
742                 if (ch->bl) {
743                         ch->bl->props.power = FB_BLANK_POWERDOWN;
744                         backlight_update_status(ch->bl);
745                 }
746
747                 board_cfg = &ch->cfg.board_cfg;
748                 if (board_cfg->display_off && try_module_get(board_cfg->owner)) {
749                         board_cfg->display_off(board_cfg->board_data);
750                         module_put(board_cfg->owner);
751                 }
752
753                 /* disable the meram */
754                 if (ch->meram_enabled) {
755                         struct sh_mobile_meram_cfg *cfg;
756                         struct sh_mobile_meram_info *mdev;
757                         cfg = ch->cfg.meram_cfg;
758                         mdev = priv->meram_dev;
759                         mdev->ops->meram_unregister(mdev, cfg);
760                         ch->meram_enabled = 0;
761                 }
762
763         }
764
765         /* stop the lcdc */
766         if (priv->started) {
767                 sh_mobile_lcdc_start_stop(priv, 0);
768                 priv->started = 0;
769         }
770
771         /* stop clocks */
772         for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
773                 if (priv->ch[k].enabled)
774                         sh_mobile_lcdc_clk_off(priv);
775 }
776
777 static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
778 {
779         int ifm, miftyp;
780
781         switch (ch->cfg.interface_type) {
782         case RGB8: ifm = 0; miftyp = 0; break;
783         case RGB9: ifm = 0; miftyp = 4; break;
784         case RGB12A: ifm = 0; miftyp = 5; break;
785         case RGB12B: ifm = 0; miftyp = 6; break;
786         case RGB16: ifm = 0; miftyp = 7; break;
787         case RGB18: ifm = 0; miftyp = 10; break;
788         case RGB24: ifm = 0; miftyp = 11; break;
789         case SYS8A: ifm = 1; miftyp = 0; break;
790         case SYS8B: ifm = 1; miftyp = 1; break;
791         case SYS8C: ifm = 1; miftyp = 2; break;
792         case SYS8D: ifm = 1; miftyp = 3; break;
793         case SYS9: ifm = 1; miftyp = 4; break;
794         case SYS12: ifm = 1; miftyp = 5; break;
795         case SYS16A: ifm = 1; miftyp = 7; break;
796         case SYS16B: ifm = 1; miftyp = 8; break;
797         case SYS16C: ifm = 1; miftyp = 9; break;
798         case SYS18: ifm = 1; miftyp = 10; break;
799         case SYS24: ifm = 1; miftyp = 11; break;
800         default: goto bad;
801         }
802
803         /* SUBLCD only supports SYS interface */
804         if (lcdc_chan_is_sublcd(ch)) {
805                 if (ifm == 0)
806                         goto bad;
807                 else
808                         ifm = 0;
809         }
810
811         ch->ldmt1r_value = (ifm << 12) | miftyp;
812         return 0;
813  bad:
814         return -EINVAL;
815 }
816
817 static int sh_mobile_lcdc_setup_clocks(struct platform_device *pdev,
818                                        int clock_source,
819                                        struct sh_mobile_lcdc_priv *priv)
820 {
821         char *str;
822         int icksel;
823
824         switch (clock_source) {
825         case LCDC_CLK_BUS: str = "bus_clk"; icksel = 0; break;
826         case LCDC_CLK_PERIPHERAL: str = "peripheral_clk"; icksel = 1; break;
827         case LCDC_CLK_EXTERNAL: str = NULL; icksel = 2; break;
828         default:
829                 return -EINVAL;
830         }
831
832         priv->lddckr = icksel << 16;
833
834         if (str) {
835                 priv->dot_clk = clk_get(&pdev->dev, str);
836                 if (IS_ERR(priv->dot_clk)) {
837                         dev_err(&pdev->dev, "cannot get dot clock %s\n", str);
838                         return PTR_ERR(priv->dot_clk);
839                 }
840         }
841
842         /* Runtime PM support involves two step for this driver:
843          * 1) Enable Runtime PM
844          * 2) Force Runtime PM Resume since hardware is accessed from probe()
845          */
846         priv->dev = &pdev->dev;
847         pm_runtime_enable(priv->dev);
848         pm_runtime_resume(priv->dev);
849         return 0;
850 }
851
852 static int sh_mobile_lcdc_setcolreg(u_int regno,
853                                     u_int red, u_int green, u_int blue,
854                                     u_int transp, struct fb_info *info)
855 {
856         u32 *palette = info->pseudo_palette;
857
858         if (regno >= PALETTE_NR)
859                 return -EINVAL;
860
861         /* only FB_VISUAL_TRUECOLOR supported */
862
863         red >>= 16 - info->var.red.length;
864         green >>= 16 - info->var.green.length;
865         blue >>= 16 - info->var.blue.length;
866         transp >>= 16 - info->var.transp.length;
867
868         palette[regno] = (red << info->var.red.offset) |
869           (green << info->var.green.offset) |
870           (blue << info->var.blue.offset) |
871           (transp << info->var.transp.offset);
872
873         return 0;
874 }
875
876 static struct fb_fix_screeninfo sh_mobile_lcdc_fix  = {
877         .id =           "SH Mobile LCDC",
878         .type =         FB_TYPE_PACKED_PIXELS,
879         .visual =       FB_VISUAL_TRUECOLOR,
880         .accel =        FB_ACCEL_NONE,
881         .xpanstep =     0,
882         .ypanstep =     1,
883         .ywrapstep =    0,
884 };
885
886 static void sh_mobile_lcdc_fillrect(struct fb_info *info,
887                                     const struct fb_fillrect *rect)
888 {
889         sys_fillrect(info, rect);
890         sh_mobile_lcdc_deferred_io_touch(info);
891 }
892
893 static void sh_mobile_lcdc_copyarea(struct fb_info *info,
894                                     const struct fb_copyarea *area)
895 {
896         sys_copyarea(info, area);
897         sh_mobile_lcdc_deferred_io_touch(info);
898 }
899
900 static void sh_mobile_lcdc_imageblit(struct fb_info *info,
901                                      const struct fb_image *image)
902 {
903         sys_imageblit(info, image);
904         sh_mobile_lcdc_deferred_io_touch(info);
905 }
906
907 static int sh_mobile_fb_pan_display(struct fb_var_screeninfo *var,
908                                      struct fb_info *info)
909 {
910         struct sh_mobile_lcdc_chan *ch = info->par;
911         struct sh_mobile_lcdc_priv *priv = ch->lcdc;
912         unsigned long ldrcntr;
913         unsigned long new_pan_offset;
914         unsigned long base_addr_y, base_addr_c;
915         unsigned long c_offset;
916
917         if (!var->nonstd)
918                 new_pan_offset = (var->yoffset * info->fix.line_length) +
919                         (var->xoffset * (info->var.bits_per_pixel / 8));
920         else
921                 new_pan_offset = (var->yoffset * info->fix.line_length) +
922                         (var->xoffset);
923
924         if (new_pan_offset == ch->pan_offset)
925                 return 0;       /* No change, do nothing */
926
927         ldrcntr = lcdc_read(priv, _LDRCNTR);
928
929         /* Set the source address for the next refresh */
930         base_addr_y = ch->dma_handle + new_pan_offset;
931         if (var->nonstd) {
932                 /* Set y offset */
933                 c_offset = (var->yoffset *
934                         info->fix.line_length *
935                         (info->var.bits_per_pixel - 8)) / 8;
936                 base_addr_c = ch->dma_handle + var->xres * var->yres_virtual +
937                         c_offset;
938                 /* Set x offset */
939                 if (info->var.bits_per_pixel == 24)
940                         base_addr_c += 2 * var->xoffset;
941                 else
942                         base_addr_c += var->xoffset;
943         } else
944                 base_addr_c = 0;
945
946         if (!ch->meram_enabled) {
947                 lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y);
948                 if (base_addr_c)
949                         lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c);
950         } else {
951                 struct sh_mobile_meram_cfg *cfg;
952                 struct sh_mobile_meram_info *mdev;
953                 unsigned long icb_addr_y, icb_addr_c;
954                 int ret;
955
956                 cfg = ch->cfg.meram_cfg;
957                 mdev = priv->meram_dev;
958                 ret = mdev->ops->meram_update(mdev, cfg,
959                                         base_addr_y, base_addr_c,
960                                         &icb_addr_y, &icb_addr_c);
961                 if (ret)
962                         return ret;
963
964                 lcdc_write_chan_mirror(ch, LDSA1R, icb_addr_y);
965                 if (icb_addr_c)
966                         lcdc_write_chan_mirror(ch, LDSA2R, icb_addr_c);
967
968         }
969
970         if (lcdc_chan_is_sublcd(ch))
971                 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
972         else
973                 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS);
974
975         ch->pan_offset = new_pan_offset;
976
977         sh_mobile_lcdc_deferred_io_touch(info);
978
979         return 0;
980 }
981
982 static int sh_mobile_wait_for_vsync(struct fb_info *info)
983 {
984         struct sh_mobile_lcdc_chan *ch = info->par;
985         unsigned long ldintr;
986         int ret;
987
988         /* Enable VSync End interrupt */
989         ldintr = lcdc_read(ch->lcdc, _LDINTR);
990         ldintr |= LDINTR_VEE;
991         lcdc_write(ch->lcdc, _LDINTR, ldintr);
992
993         ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion,
994                                                         msecs_to_jiffies(100));
995         if (!ret)
996                 return -ETIMEDOUT;
997
998         return 0;
999 }
1000
1001 static int sh_mobile_ioctl(struct fb_info *info, unsigned int cmd,
1002                        unsigned long arg)
1003 {
1004         int retval;
1005
1006         switch (cmd) {
1007         case FBIO_WAITFORVSYNC:
1008                 retval = sh_mobile_wait_for_vsync(info);
1009                 break;
1010
1011         default:
1012                 retval = -ENOIOCTLCMD;
1013                 break;
1014         }
1015         return retval;
1016 }
1017
1018 static void sh_mobile_fb_reconfig(struct fb_info *info)
1019 {
1020         struct sh_mobile_lcdc_chan *ch = info->par;
1021         struct fb_videomode mode1, mode2;
1022         struct fb_event event;
1023         int evnt = FB_EVENT_MODE_CHANGE_ALL;
1024
1025         if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par))
1026                 /* More framebuffer users are active */
1027                 return;
1028
1029         fb_var_to_videomode(&mode1, &ch->display_var);
1030         fb_var_to_videomode(&mode2, &info->var);
1031
1032         if (fb_mode_is_equal(&mode1, &mode2))
1033                 return;
1034
1035         /* Display has been re-plugged, framebuffer is free now, reconfigure */
1036         if (fb_set_var(info, &ch->display_var) < 0)
1037                 /* Couldn't reconfigure, hopefully, can continue as before */
1038                 return;
1039
1040         if (info->var.nonstd)
1041                 info->fix.line_length = mode1.xres;
1042         else
1043                 info->fix.line_length = mode1.xres * (ch->cfg.bpp / 8);
1044
1045         /*
1046          * fb_set_var() calls the notifier change internally, only if
1047          * FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a
1048          * user event, we have to call the chain ourselves.
1049          */
1050         event.info = info;
1051         event.data = &mode1;
1052         fb_notifier_call_chain(evnt, &event);
1053 }
1054
1055 /*
1056  * Locking: both .fb_release() and .fb_open() are called with info->lock held if
1057  * user == 1, or with console sem held, if user == 0.
1058  */
1059 static int sh_mobile_release(struct fb_info *info, int user)
1060 {
1061         struct sh_mobile_lcdc_chan *ch = info->par;
1062
1063         mutex_lock(&ch->open_lock);
1064         dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1065
1066         ch->use_count--;
1067
1068         /* Nothing to reconfigure, when called from fbcon */
1069         if (user) {
1070                 console_lock();
1071                 sh_mobile_fb_reconfig(info);
1072                 console_unlock();
1073         }
1074
1075         mutex_unlock(&ch->open_lock);
1076
1077         return 0;
1078 }
1079
1080 static int sh_mobile_open(struct fb_info *info, int user)
1081 {
1082         struct sh_mobile_lcdc_chan *ch = info->par;
1083
1084         mutex_lock(&ch->open_lock);
1085         ch->use_count++;
1086
1087         dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1088         mutex_unlock(&ch->open_lock);
1089
1090         return 0;
1091 }
1092
1093 static int sh_mobile_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
1094 {
1095         struct sh_mobile_lcdc_chan *ch = info->par;
1096         struct sh_mobile_lcdc_priv *p = ch->lcdc;
1097
1098         if (var->xres > MAX_XRES || var->yres > MAX_YRES ||
1099             var->xres * var->yres * (ch->cfg.bpp / 8) * 2 > info->fix.smem_len) {
1100                 dev_warn(info->dev, "Invalid info: %u-%u-%u-%u x %u-%u-%u-%u @ %lukHz!\n",
1101                          var->left_margin, var->xres, var->right_margin, var->hsync_len,
1102                          var->upper_margin, var->yres, var->lower_margin, var->vsync_len,
1103                          PICOS2KHZ(var->pixclock));
1104                 return -EINVAL;
1105         }
1106
1107         /* only accept the forced_bpp for dual channel configurations */
1108         if (p->forced_bpp && p->forced_bpp != var->bits_per_pixel)
1109                 return -EINVAL;
1110
1111         switch (var->bits_per_pixel) {
1112         case 16: /* PKF[4:0] = 00011 - RGB 565 */
1113         case 24: /* PKF[4:0] = 01011 - RGB 888 */
1114         case 32: /* PKF[4:0] = 00000 - RGBA 888 */
1115                 break;
1116         default:
1117                 return -EINVAL;
1118         }
1119
1120         return 0;
1121 }
1122
1123 /*
1124  * Screen blanking. Behavior is as follows:
1125  * FB_BLANK_UNBLANK: screen unblanked, clocks enabled
1126  * FB_BLANK_NORMAL: screen blanked, clocks enabled
1127  * FB_BLANK_VSYNC,
1128  * FB_BLANK_HSYNC,
1129  * FB_BLANK_POWEROFF: screen blanked, clocks disabled
1130  */
1131 static int sh_mobile_lcdc_blank(int blank, struct fb_info *info)
1132 {
1133         struct sh_mobile_lcdc_chan *ch = info->par;
1134         struct sh_mobile_lcdc_priv *p = ch->lcdc;
1135
1136         /* blank the screen? */
1137         if (blank > FB_BLANK_UNBLANK && ch->blank_status == FB_BLANK_UNBLANK) {
1138                 struct fb_fillrect rect = {
1139                         .width = info->var.xres,
1140                         .height = info->var.yres,
1141                 };
1142                 sh_mobile_lcdc_fillrect(info, &rect);
1143         }
1144         /* turn clocks on? */
1145         if (blank <= FB_BLANK_NORMAL && ch->blank_status > FB_BLANK_NORMAL) {
1146                 sh_mobile_lcdc_clk_on(p);
1147         }
1148         /* turn clocks off? */
1149         if (blank > FB_BLANK_NORMAL && ch->blank_status <= FB_BLANK_NORMAL) {
1150                 /* make sure the screen is updated with the black fill before
1151                  * switching the clocks off. one vsync is not enough since
1152                  * blanking may occur in the middle of a refresh. deferred io
1153                  * mode will reenable the clocks and update the screen in time,
1154                  * so it does not need this. */
1155                 if (!info->fbdefio) {
1156                         sh_mobile_wait_for_vsync(info);
1157                         sh_mobile_wait_for_vsync(info);
1158                 }
1159                 sh_mobile_lcdc_clk_off(p);
1160         }
1161
1162         ch->blank_status = blank;
1163         return 0;
1164 }
1165
1166 static struct fb_ops sh_mobile_lcdc_ops = {
1167         .owner          = THIS_MODULE,
1168         .fb_setcolreg   = sh_mobile_lcdc_setcolreg,
1169         .fb_read        = fb_sys_read,
1170         .fb_write       = fb_sys_write,
1171         .fb_fillrect    = sh_mobile_lcdc_fillrect,
1172         .fb_copyarea    = sh_mobile_lcdc_copyarea,
1173         .fb_imageblit   = sh_mobile_lcdc_imageblit,
1174         .fb_blank       = sh_mobile_lcdc_blank,
1175         .fb_pan_display = sh_mobile_fb_pan_display,
1176         .fb_ioctl       = sh_mobile_ioctl,
1177         .fb_open        = sh_mobile_open,
1178         .fb_release     = sh_mobile_release,
1179         .fb_check_var   = sh_mobile_check_var,
1180 };
1181
1182 static int sh_mobile_lcdc_update_bl(struct backlight_device *bdev)
1183 {
1184         struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
1185         struct sh_mobile_lcdc_board_cfg *cfg = &ch->cfg.board_cfg;
1186         int brightness = bdev->props.brightness;
1187
1188         if (bdev->props.power != FB_BLANK_UNBLANK ||
1189             bdev->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
1190                 brightness = 0;
1191
1192         return cfg->set_brightness(cfg->board_data, brightness);
1193 }
1194
1195 static int sh_mobile_lcdc_get_brightness(struct backlight_device *bdev)
1196 {
1197         struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
1198         struct sh_mobile_lcdc_board_cfg *cfg = &ch->cfg.board_cfg;
1199
1200         return cfg->get_brightness(cfg->board_data);
1201 }
1202
1203 static int sh_mobile_lcdc_check_fb(struct backlight_device *bdev,
1204                                    struct fb_info *info)
1205 {
1206         return (info->bl_dev == bdev);
1207 }
1208
1209 static struct backlight_ops sh_mobile_lcdc_bl_ops = {
1210         .options        = BL_CORE_SUSPENDRESUME,
1211         .update_status  = sh_mobile_lcdc_update_bl,
1212         .get_brightness = sh_mobile_lcdc_get_brightness,
1213         .check_fb       = sh_mobile_lcdc_check_fb,
1214 };
1215
1216 static struct backlight_device *sh_mobile_lcdc_bl_probe(struct device *parent,
1217                                                struct sh_mobile_lcdc_chan *ch)
1218 {
1219         struct backlight_device *bl;
1220
1221         bl = backlight_device_register(ch->cfg.bl_info.name, parent, ch,
1222                                        &sh_mobile_lcdc_bl_ops, NULL);
1223         if (IS_ERR(bl)) {
1224                 dev_err(parent, "unable to register backlight device: %ld\n",
1225                         PTR_ERR(bl));
1226                 return NULL;
1227         }
1228
1229         bl->props.max_brightness = ch->cfg.bl_info.max_brightness;
1230         bl->props.brightness = bl->props.max_brightness;
1231         backlight_update_status(bl);
1232
1233         return bl;
1234 }
1235
1236 static void sh_mobile_lcdc_bl_remove(struct backlight_device *bdev)
1237 {
1238         backlight_device_unregister(bdev);
1239 }
1240
1241 static int sh_mobile_lcdc_set_bpp(struct fb_var_screeninfo *var, int bpp,
1242                                    int nonstd)
1243 {
1244         if (nonstd) {
1245                 switch (bpp) {
1246                 case 12:
1247                 case 16:
1248                 case 24:
1249                         var->bits_per_pixel = bpp;
1250                         var->nonstd = nonstd;
1251                         return 0;
1252                 default:
1253                         return -EINVAL;
1254                 }
1255         }
1256
1257         switch (bpp) {
1258         case 16: /* PKF[4:0] = 00011 - RGB 565 */
1259                 var->red.offset = 11;
1260                 var->red.length = 5;
1261                 var->green.offset = 5;
1262                 var->green.length = 6;
1263                 var->blue.offset = 0;
1264                 var->blue.length = 5;
1265                 var->transp.offset = 0;
1266                 var->transp.length = 0;
1267                 break;
1268
1269         case 24: /* PKF[4:0] = 01011 - RGB 888 */
1270                 var->red.offset = 16;
1271                 var->red.length = 8;
1272                 var->green.offset = 8;
1273                 var->green.length = 8;
1274                 var->blue.offset = 0;
1275                 var->blue.length = 8;
1276                 var->transp.offset = 0;
1277                 var->transp.length = 0;
1278                 break;
1279
1280         case 32: /* PKF[4:0] = 00000 - RGBA 888 */
1281                 var->red.offset = 16;
1282                 var->red.length = 8;
1283                 var->green.offset = 8;
1284                 var->green.length = 8;
1285                 var->blue.offset = 0;
1286                 var->blue.length = 8;
1287                 var->transp.offset = 24;
1288                 var->transp.length = 8;
1289                 break;
1290         default:
1291                 return -EINVAL;
1292         }
1293         var->bits_per_pixel = bpp;
1294         var->red.msb_right = 0;
1295         var->green.msb_right = 0;
1296         var->blue.msb_right = 0;
1297         var->transp.msb_right = 0;
1298         return 0;
1299 }
1300
1301 static int sh_mobile_lcdc_suspend(struct device *dev)
1302 {
1303         struct platform_device *pdev = to_platform_device(dev);
1304
1305         sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
1306         return 0;
1307 }
1308
1309 static int sh_mobile_lcdc_resume(struct device *dev)
1310 {
1311         struct platform_device *pdev = to_platform_device(dev);
1312
1313         return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
1314 }
1315
1316 static int sh_mobile_lcdc_runtime_suspend(struct device *dev)
1317 {
1318         struct platform_device *pdev = to_platform_device(dev);
1319         struct sh_mobile_lcdc_priv *p = platform_get_drvdata(pdev);
1320         struct sh_mobile_lcdc_chan *ch;
1321         int k, n;
1322
1323         /* save per-channel registers */
1324         for (k = 0; k < ARRAY_SIZE(p->ch); k++) {
1325                 ch = &p->ch[k];
1326                 if (!ch->enabled)
1327                         continue;
1328                 for (n = 0; n < NR_CH_REGS; n++)
1329                         ch->saved_ch_regs[n] = lcdc_read_chan(ch, n);
1330         }
1331
1332         /* save shared registers */
1333         for (n = 0; n < NR_SHARED_REGS; n++)
1334                 p->saved_shared_regs[n] = lcdc_read(p, lcdc_shared_regs[n]);
1335
1336         /* turn off LCDC hardware */
1337         lcdc_write(p, _LDCNT1R, 0);
1338         return 0;
1339 }
1340
1341 static int sh_mobile_lcdc_runtime_resume(struct device *dev)
1342 {
1343         struct platform_device *pdev = to_platform_device(dev);
1344         struct sh_mobile_lcdc_priv *p = platform_get_drvdata(pdev);
1345         struct sh_mobile_lcdc_chan *ch;
1346         int k, n;
1347
1348         /* restore per-channel registers */
1349         for (k = 0; k < ARRAY_SIZE(p->ch); k++) {
1350                 ch = &p->ch[k];
1351                 if (!ch->enabled)
1352                         continue;
1353                 for (n = 0; n < NR_CH_REGS; n++)
1354                         lcdc_write_chan(ch, n, ch->saved_ch_regs[n]);
1355         }
1356
1357         /* restore shared registers */
1358         for (n = 0; n < NR_SHARED_REGS; n++)
1359                 lcdc_write(p, lcdc_shared_regs[n], p->saved_shared_regs[n]);
1360
1361         return 0;
1362 }
1363
1364 static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
1365         .suspend = sh_mobile_lcdc_suspend,
1366         .resume = sh_mobile_lcdc_resume,
1367         .runtime_suspend = sh_mobile_lcdc_runtime_suspend,
1368         .runtime_resume = sh_mobile_lcdc_runtime_resume,
1369 };
1370
1371 /* locking: called with info->lock held */
1372 static int sh_mobile_lcdc_notify(struct notifier_block *nb,
1373                                  unsigned long action, void *data)
1374 {
1375         struct fb_event *event = data;
1376         struct fb_info *info = event->info;
1377         struct sh_mobile_lcdc_chan *ch = info->par;
1378         struct sh_mobile_lcdc_board_cfg *board_cfg = &ch->cfg.board_cfg;
1379
1380         if (&ch->lcdc->notifier != nb)
1381                 return NOTIFY_DONE;
1382
1383         dev_dbg(info->dev, "%s(): action = %lu, data = %p\n",
1384                 __func__, action, event->data);
1385
1386         switch(action) {
1387         case FB_EVENT_SUSPEND:
1388                 if (board_cfg->display_off && try_module_get(board_cfg->owner)) {
1389                         board_cfg->display_off(board_cfg->board_data);
1390                         module_put(board_cfg->owner);
1391                 }
1392                 sh_mobile_lcdc_stop(ch->lcdc);
1393                 break;
1394         case FB_EVENT_RESUME:
1395                 mutex_lock(&ch->open_lock);
1396                 sh_mobile_fb_reconfig(info);
1397                 mutex_unlock(&ch->open_lock);
1398
1399                 /* HDMI must be enabled before LCDC configuration */
1400                 if (board_cfg->display_on && try_module_get(board_cfg->owner)) {
1401                         board_cfg->display_on(board_cfg->board_data, info);
1402                         module_put(board_cfg->owner);
1403                 }
1404
1405                 sh_mobile_lcdc_start(ch->lcdc);
1406         }
1407
1408         return NOTIFY_OK;
1409 }
1410
1411 static int sh_mobile_lcdc_remove(struct platform_device *pdev);
1412
1413 static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev)
1414 {
1415         struct fb_info *info;
1416         struct sh_mobile_lcdc_priv *priv;
1417         struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data;
1418         struct resource *res;
1419         int error;
1420         void *buf;
1421         int i, j;
1422
1423         if (!pdata) {
1424                 dev_err(&pdev->dev, "no platform data defined\n");
1425                 return -EINVAL;
1426         }
1427
1428         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1429         i = platform_get_irq(pdev, 0);
1430         if (!res || i < 0) {
1431                 dev_err(&pdev->dev, "cannot get platform resources\n");
1432                 return -ENOENT;
1433         }
1434
1435         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
1436         if (!priv) {
1437                 dev_err(&pdev->dev, "cannot allocate device data\n");
1438                 return -ENOMEM;
1439         }
1440
1441         platform_set_drvdata(pdev, priv);
1442
1443         error = request_irq(i, sh_mobile_lcdc_irq, IRQF_DISABLED,
1444                             dev_name(&pdev->dev), priv);
1445         if (error) {
1446                 dev_err(&pdev->dev, "unable to request irq\n");
1447                 goto err1;
1448         }
1449
1450         priv->irq = i;
1451         atomic_set(&priv->hw_usecnt, -1);
1452
1453         j = 0;
1454         for (i = 0; i < ARRAY_SIZE(pdata->ch); i++) {
1455                 struct sh_mobile_lcdc_chan *ch = priv->ch + j;
1456
1457                 ch->lcdc = priv;
1458                 memcpy(&ch->cfg, &pdata->ch[i], sizeof(pdata->ch[i]));
1459
1460                 error = sh_mobile_lcdc_check_interface(ch);
1461                 if (error) {
1462                         dev_err(&pdev->dev, "unsupported interface type\n");
1463                         goto err1;
1464                 }
1465                 init_waitqueue_head(&ch->frame_end_wait);
1466                 init_completion(&ch->vsync_completion);
1467                 ch->pan_offset = 0;
1468
1469                 /* probe the backlight is there is one defined */
1470                 if (ch->cfg.bl_info.max_brightness)
1471                         ch->bl = sh_mobile_lcdc_bl_probe(&pdev->dev, ch);
1472
1473                 switch (pdata->ch[i].chan) {
1474                 case LCDC_CHAN_MAINLCD:
1475                         ch->enabled = 1 << 1;
1476                         ch->reg_offs = lcdc_offs_mainlcd;
1477                         j++;
1478                         break;
1479                 case LCDC_CHAN_SUBLCD:
1480                         ch->enabled = 1 << 2;
1481                         ch->reg_offs = lcdc_offs_sublcd;
1482                         j++;
1483                         break;
1484                 }
1485         }
1486
1487         if (!j) {
1488                 dev_err(&pdev->dev, "no channels defined\n");
1489                 error = -EINVAL;
1490                 goto err1;
1491         }
1492
1493         /* for dual channel LCDC (MAIN + SUB) force shared bpp setting */
1494         if (j == 2)
1495                 priv->forced_bpp = pdata->ch[0].bpp;
1496
1497         priv->base = ioremap_nocache(res->start, resource_size(res));
1498         if (!priv->base)
1499                 goto err1;
1500
1501         error = sh_mobile_lcdc_setup_clocks(pdev, pdata->clock_source, priv);
1502         if (error) {
1503                 dev_err(&pdev->dev, "unable to setup clocks\n");
1504                 goto err1;
1505         }
1506
1507         priv->meram_dev = pdata->meram_dev;
1508
1509         for (i = 0; i < j; i++) {
1510                 struct fb_var_screeninfo *var;
1511                 const struct fb_videomode *lcd_cfg, *max_cfg = NULL;
1512                 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
1513                 struct sh_mobile_lcdc_chan_cfg *cfg = &ch->cfg;
1514                 const struct fb_videomode *mode = cfg->lcd_cfg;
1515                 unsigned long max_size = 0;
1516                 int k;
1517                 int num_cfg;
1518
1519                 ch->info = framebuffer_alloc(0, &pdev->dev);
1520                 if (!ch->info) {
1521                         dev_err(&pdev->dev, "unable to allocate fb_info\n");
1522                         error = -ENOMEM;
1523                         break;
1524                 }
1525
1526                 info = ch->info;
1527                 var = &info->var;
1528                 info->fbops = &sh_mobile_lcdc_ops;
1529                 info->par = ch;
1530
1531                 mutex_init(&ch->open_lock);
1532
1533                 for (k = 0, lcd_cfg = mode;
1534                      k < cfg->num_cfg && lcd_cfg;
1535                      k++, lcd_cfg++) {
1536                         unsigned long size = lcd_cfg->yres * lcd_cfg->xres;
1537                         /* NV12 buffers must have even number of lines */
1538                         if ((cfg->nonstd) && cfg->bpp == 12 &&
1539                                         (lcd_cfg->yres & 0x1)) {
1540                                 dev_err(&pdev->dev, "yres must be multiple of 2"
1541                                                 " for YCbCr420 mode.\n");
1542                                 error = -EINVAL;
1543                                 goto err1;
1544                         }
1545
1546                         if (size > max_size) {
1547                                 max_cfg = lcd_cfg;
1548                                 max_size = size;
1549                         }
1550                 }
1551
1552                 if (!mode)
1553                         max_size = MAX_XRES * MAX_YRES;
1554                 else if (max_cfg)
1555                         dev_dbg(&pdev->dev, "Found largest videomode %ux%u\n",
1556                                 max_cfg->xres, max_cfg->yres);
1557
1558                 info->fix = sh_mobile_lcdc_fix;
1559                 info->fix.smem_len = max_size * 2 * cfg->bpp / 8;
1560
1561                  /* Only pan in 2 line steps for NV12 */
1562                 if (cfg->nonstd && cfg->bpp == 12)
1563                         info->fix.ypanstep = 2;
1564
1565                 if (!mode) {
1566                         mode = &default_720p;
1567                         num_cfg = 1;
1568                 } else {
1569                         num_cfg = cfg->num_cfg;
1570                 }
1571
1572                 fb_videomode_to_modelist(mode, num_cfg, &info->modelist);
1573
1574                 fb_videomode_to_var(var, mode);
1575                 var->width = cfg->lcd_size_cfg.width;
1576                 var->height = cfg->lcd_size_cfg.height;
1577                 /* Default Y virtual resolution is 2x panel size */
1578                 var->yres_virtual = var->yres * 2;
1579                 var->activate = FB_ACTIVATE_NOW;
1580
1581                 error = sh_mobile_lcdc_set_bpp(var, cfg->bpp, cfg->nonstd);
1582                 if (error)
1583                         break;
1584
1585                 buf = dma_alloc_coherent(&pdev->dev, info->fix.smem_len,
1586                                          &ch->dma_handle, GFP_KERNEL);
1587                 if (!buf) {
1588                         dev_err(&pdev->dev, "unable to allocate buffer\n");
1589                         error = -ENOMEM;
1590                         break;
1591                 }
1592
1593                 info->pseudo_palette = &ch->pseudo_palette;
1594                 info->flags = FBINFO_FLAG_DEFAULT;
1595
1596                 error = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
1597                 if (error < 0) {
1598                         dev_err(&pdev->dev, "unable to allocate cmap\n");
1599                         dma_free_coherent(&pdev->dev, info->fix.smem_len,
1600                                           buf, ch->dma_handle);
1601                         break;
1602                 }
1603
1604                 info->fix.smem_start = ch->dma_handle;
1605                 if (var->nonstd)
1606                         info->fix.line_length = var->xres;
1607                 else
1608                         info->fix.line_length = var->xres * (cfg->bpp / 8);
1609
1610                 info->screen_base = buf;
1611                 info->device = &pdev->dev;
1612                 ch->display_var = *var;
1613         }
1614
1615         if (error)
1616                 goto err1;
1617
1618         error = sh_mobile_lcdc_start(priv);
1619         if (error) {
1620                 dev_err(&pdev->dev, "unable to start hardware\n");
1621                 goto err1;
1622         }
1623
1624         for (i = 0; i < j; i++) {
1625                 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
1626
1627                 info = ch->info;
1628
1629                 if (info->fbdefio) {
1630                         ch->sglist = vmalloc(sizeof(struct scatterlist) *
1631                                         info->fix.smem_len >> PAGE_SHIFT);
1632                         if (!ch->sglist) {
1633                                 dev_err(&pdev->dev, "cannot allocate sglist\n");
1634                                 goto err1;
1635                         }
1636                 }
1637
1638                 info->bl_dev = ch->bl;
1639
1640                 error = register_framebuffer(info);
1641                 if (error < 0)
1642                         goto err1;
1643
1644                 dev_info(info->dev,
1645                          "registered %s/%s as %dx%d %dbpp.\n",
1646                          pdev->name,
1647                          (ch->cfg.chan == LCDC_CHAN_MAINLCD) ?
1648                          "mainlcd" : "sublcd",
1649                          info->var.xres, info->var.yres,
1650                          ch->cfg.bpp);
1651
1652                 /* deferred io mode: disable clock to save power */
1653                 if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED)
1654                         sh_mobile_lcdc_clk_off(priv);
1655         }
1656
1657         /* Failure ignored */
1658         priv->notifier.notifier_call = sh_mobile_lcdc_notify;
1659         fb_register_client(&priv->notifier);
1660
1661         return 0;
1662 err1:
1663         sh_mobile_lcdc_remove(pdev);
1664
1665         return error;
1666 }
1667
1668 static int sh_mobile_lcdc_remove(struct platform_device *pdev)
1669 {
1670         struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
1671         struct fb_info *info;
1672         int i;
1673
1674         fb_unregister_client(&priv->notifier);
1675
1676         for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
1677                 if (priv->ch[i].info && priv->ch[i].info->dev)
1678                         unregister_framebuffer(priv->ch[i].info);
1679
1680         sh_mobile_lcdc_stop(priv);
1681
1682         for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
1683                 info = priv->ch[i].info;
1684
1685                 if (!info || !info->device)
1686                         continue;
1687
1688                 if (priv->ch[i].sglist)
1689                         vfree(priv->ch[i].sglist);
1690
1691                 if (info->screen_base)
1692                         dma_free_coherent(&pdev->dev, info->fix.smem_len,
1693                                           info->screen_base,
1694                                           priv->ch[i].dma_handle);
1695                 fb_dealloc_cmap(&info->cmap);
1696                 framebuffer_release(info);
1697         }
1698
1699         for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
1700                 if (priv->ch[i].bl)
1701                         sh_mobile_lcdc_bl_remove(priv->ch[i].bl);
1702         }
1703
1704         if (priv->dot_clk)
1705                 clk_put(priv->dot_clk);
1706
1707         if (priv->dev)
1708                 pm_runtime_disable(priv->dev);
1709
1710         if (priv->base)
1711                 iounmap(priv->base);
1712
1713         if (priv->irq)
1714                 free_irq(priv->irq, priv);
1715         kfree(priv);
1716         return 0;
1717 }
1718
1719 static struct platform_driver sh_mobile_lcdc_driver = {
1720         .driver         = {
1721                 .name           = "sh_mobile_lcdc_fb",
1722                 .owner          = THIS_MODULE,
1723                 .pm             = &sh_mobile_lcdc_dev_pm_ops,
1724         },
1725         .probe          = sh_mobile_lcdc_probe,
1726         .remove         = sh_mobile_lcdc_remove,
1727 };
1728
1729 static int __init sh_mobile_lcdc_init(void)
1730 {
1731         return platform_driver_register(&sh_mobile_lcdc_driver);
1732 }
1733
1734 static void __exit sh_mobile_lcdc_exit(void)
1735 {
1736         platform_driver_unregister(&sh_mobile_lcdc_driver);
1737 }
1738
1739 module_init(sh_mobile_lcdc_init);
1740 module_exit(sh_mobile_lcdc_exit);
1741
1742 MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
1743 MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
1744 MODULE_LICENSE("GPL v2");