fbdev: sh_mobile_lcdc: increase maximum framebuffer size to support 1080p
[~shefty/rdma-dev.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 <video/sh_mobile_lcdc.h>
25 #include <asm/atomic.h>
26
27 #include "sh_mobile_lcdcfb.h"
28
29 #define SIDE_B_OFFSET 0x1000
30 #define MIRROR_OFFSET 0x2000
31
32 /* shared registers */
33 #define _LDDCKR 0x410
34 #define _LDDCKSTPR 0x414
35 #define _LDINTR 0x468
36 #define _LDSR 0x46c
37 #define _LDCNT1R 0x470
38 #define _LDCNT2R 0x474
39 #define _LDRCNTR 0x478
40 #define _LDDDSR 0x47c
41 #define _LDDWD0R 0x800
42 #define _LDDRDR 0x840
43 #define _LDDWAR 0x900
44 #define _LDDRAR 0x904
45
46 /* shared registers and their order for context save/restore */
47 static int lcdc_shared_regs[] = {
48         _LDDCKR,
49         _LDDCKSTPR,
50         _LDINTR,
51         _LDDDSR,
52         _LDCNT1R,
53         _LDCNT2R,
54 };
55 #define NR_SHARED_REGS ARRAY_SIZE(lcdc_shared_regs)
56
57 #define MAX_XRES 1920
58 #define MAX_YRES 1080
59
60 static unsigned long lcdc_offs_mainlcd[NR_CH_REGS] = {
61         [LDDCKPAT1R] = 0x400,
62         [LDDCKPAT2R] = 0x404,
63         [LDMT1R] = 0x418,
64         [LDMT2R] = 0x41c,
65         [LDMT3R] = 0x420,
66         [LDDFR] = 0x424,
67         [LDSM1R] = 0x428,
68         [LDSM2R] = 0x42c,
69         [LDSA1R] = 0x430,
70         [LDMLSR] = 0x438,
71         [LDHCNR] = 0x448,
72         [LDHSYNR] = 0x44c,
73         [LDVLNR] = 0x450,
74         [LDVSYNR] = 0x454,
75         [LDPMR] = 0x460,
76         [LDHAJR] = 0x4a0,
77 };
78
79 static unsigned long lcdc_offs_sublcd[NR_CH_REGS] = {
80         [LDDCKPAT1R] = 0x408,
81         [LDDCKPAT2R] = 0x40c,
82         [LDMT1R] = 0x600,
83         [LDMT2R] = 0x604,
84         [LDMT3R] = 0x608,
85         [LDDFR] = 0x60c,
86         [LDSM1R] = 0x610,
87         [LDSM2R] = 0x614,
88         [LDSA1R] = 0x618,
89         [LDMLSR] = 0x620,
90         [LDHCNR] = 0x624,
91         [LDHSYNR] = 0x628,
92         [LDVLNR] = 0x62c,
93         [LDVSYNR] = 0x630,
94         [LDPMR] = 0x63c,
95 };
96
97 #define START_LCDC      0x00000001
98 #define LCDC_RESET      0x00000100
99 #define DISPLAY_BEU     0x00000008
100 #define LCDC_ENABLE     0x00000001
101 #define LDINTR_FE       0x00000400
102 #define LDINTR_VSE      0x00000200
103 #define LDINTR_VEE      0x00000100
104 #define LDINTR_FS       0x00000004
105 #define LDINTR_VSS      0x00000002
106 #define LDINTR_VES      0x00000001
107 #define LDRCNTR_SRS     0x00020000
108 #define LDRCNTR_SRC     0x00010000
109 #define LDRCNTR_MRS     0x00000002
110 #define LDRCNTR_MRC     0x00000001
111 #define LDSR_MRS        0x00000100
112
113 static const struct fb_videomode default_720p = {
114         .name = "HDMI 720p",
115         .xres = 1280,
116         .yres = 720,
117
118         .left_margin = 220,
119         .right_margin = 110,
120         .hsync_len = 40,
121
122         .upper_margin = 20,
123         .lower_margin = 5,
124         .vsync_len = 5,
125
126         .pixclock = 13468,
127         .refresh = 60,
128         .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT,
129 };
130
131 struct sh_mobile_lcdc_priv {
132         void __iomem *base;
133         int irq;
134         atomic_t hw_usecnt;
135         struct device *dev;
136         struct clk *dot_clk;
137         unsigned long lddckr;
138         struct sh_mobile_lcdc_chan ch[2];
139         struct notifier_block notifier;
140         unsigned long saved_shared_regs[NR_SHARED_REGS];
141         int started;
142 };
143
144 static bool banked(int reg_nr)
145 {
146         switch (reg_nr) {
147         case LDMT1R:
148         case LDMT2R:
149         case LDMT3R:
150         case LDDFR:
151         case LDSM1R:
152         case LDSA1R:
153         case LDMLSR:
154         case LDHCNR:
155         case LDHSYNR:
156         case LDVLNR:
157         case LDVSYNR:
158                 return true;
159         }
160         return false;
161 }
162
163 static void lcdc_write_chan(struct sh_mobile_lcdc_chan *chan,
164                             int reg_nr, unsigned long data)
165 {
166         iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr]);
167         if (banked(reg_nr))
168                 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
169                           SIDE_B_OFFSET);
170 }
171
172 static void lcdc_write_chan_mirror(struct sh_mobile_lcdc_chan *chan,
173                             int reg_nr, unsigned long data)
174 {
175         iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
176                   MIRROR_OFFSET);
177 }
178
179 static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan *chan,
180                                     int reg_nr)
181 {
182         return ioread32(chan->lcdc->base + chan->reg_offs[reg_nr]);
183 }
184
185 static void lcdc_write(struct sh_mobile_lcdc_priv *priv,
186                        unsigned long reg_offs, unsigned long data)
187 {
188         iowrite32(data, priv->base + reg_offs);
189 }
190
191 static unsigned long lcdc_read(struct sh_mobile_lcdc_priv *priv,
192                                unsigned long reg_offs)
193 {
194         return ioread32(priv->base + reg_offs);
195 }
196
197 static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv,
198                           unsigned long reg_offs,
199                           unsigned long mask, unsigned long until)
200 {
201         while ((lcdc_read(priv, reg_offs) & mask) != until)
202                 cpu_relax();
203 }
204
205 static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan)
206 {
207         return chan->cfg.chan == LCDC_CHAN_SUBLCD;
208 }
209
210 static void lcdc_sys_write_index(void *handle, unsigned long data)
211 {
212         struct sh_mobile_lcdc_chan *ch = handle;
213
214         lcdc_write(ch->lcdc, _LDDWD0R, data | 0x10000000);
215         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
216         lcdc_write(ch->lcdc, _LDDWAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
217         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
218 }
219
220 static void lcdc_sys_write_data(void *handle, unsigned long data)
221 {
222         struct sh_mobile_lcdc_chan *ch = handle;
223
224         lcdc_write(ch->lcdc, _LDDWD0R, data | 0x11000000);
225         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
226         lcdc_write(ch->lcdc, _LDDWAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
227         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
228 }
229
230 static unsigned long lcdc_sys_read_data(void *handle)
231 {
232         struct sh_mobile_lcdc_chan *ch = handle;
233
234         lcdc_write(ch->lcdc, _LDDRDR, 0x01000000);
235         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
236         lcdc_write(ch->lcdc, _LDDRAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
237         udelay(1);
238         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
239
240         return lcdc_read(ch->lcdc, _LDDRDR) & 0x3ffff;
241 }
242
243 struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = {
244         lcdc_sys_write_index,
245         lcdc_sys_write_data,
246         lcdc_sys_read_data,
247 };
248
249 static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv)
250 {
251         if (atomic_inc_and_test(&priv->hw_usecnt)) {
252                 pm_runtime_get_sync(priv->dev);
253                 if (priv->dot_clk)
254                         clk_enable(priv->dot_clk);
255         }
256 }
257
258 static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv)
259 {
260         if (atomic_sub_return(1, &priv->hw_usecnt) == -1) {
261                 if (priv->dot_clk)
262                         clk_disable(priv->dot_clk);
263                 pm_runtime_put(priv->dev);
264         }
265 }
266
267 static int sh_mobile_lcdc_sginit(struct fb_info *info,
268                                   struct list_head *pagelist)
269 {
270         struct sh_mobile_lcdc_chan *ch = info->par;
271         unsigned int nr_pages_max = info->fix.smem_len >> PAGE_SHIFT;
272         struct page *page;
273         int nr_pages = 0;
274
275         sg_init_table(ch->sglist, nr_pages_max);
276
277         list_for_each_entry(page, pagelist, lru)
278                 sg_set_page(&ch->sglist[nr_pages++], page, PAGE_SIZE, 0);
279
280         return nr_pages;
281 }
282
283 static void sh_mobile_lcdc_deferred_io(struct fb_info *info,
284                                        struct list_head *pagelist)
285 {
286         struct sh_mobile_lcdc_chan *ch = info->par;
287         struct sh_mobile_lcdc_board_cfg *bcfg = &ch->cfg.board_cfg;
288
289         /* enable clocks before accessing hardware */
290         sh_mobile_lcdc_clk_on(ch->lcdc);
291
292         /*
293          * It's possible to get here without anything on the pagelist via
294          * sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync()
295          * invocation. In the former case, the acceleration routines are
296          * stepped in to when using the framebuffer console causing the
297          * workqueue to be scheduled without any dirty pages on the list.
298          *
299          * Despite this, a panel update is still needed given that the
300          * acceleration routines have their own methods for writing in
301          * that still need to be updated.
302          *
303          * The fsync() and empty pagelist case could be optimized for,
304          * but we don't bother, as any application exhibiting such
305          * behaviour is fundamentally broken anyways.
306          */
307         if (!list_empty(pagelist)) {
308                 unsigned int nr_pages = sh_mobile_lcdc_sginit(info, pagelist);
309
310                 /* trigger panel update */
311                 dma_map_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
312                 if (bcfg->start_transfer)
313                         bcfg->start_transfer(bcfg->board_data, ch,
314                                              &sh_mobile_lcdc_sys_bus_ops);
315                 lcdc_write_chan(ch, LDSM2R, 1);
316                 dma_unmap_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
317         } else {
318                 if (bcfg->start_transfer)
319                         bcfg->start_transfer(bcfg->board_data, ch,
320                                              &sh_mobile_lcdc_sys_bus_ops);
321                 lcdc_write_chan(ch, LDSM2R, 1);
322         }
323 }
324
325 static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info)
326 {
327         struct fb_deferred_io *fbdefio = info->fbdefio;
328
329         if (fbdefio)
330                 schedule_delayed_work(&info->deferred_work, fbdefio->delay);
331 }
332
333 static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
334 {
335         struct sh_mobile_lcdc_priv *priv = data;
336         struct sh_mobile_lcdc_chan *ch;
337         unsigned long tmp;
338         unsigned long ldintr;
339         int is_sub;
340         int k;
341
342         /* acknowledge interrupt */
343         ldintr = tmp = lcdc_read(priv, _LDINTR);
344         /*
345          * disable further VSYNC End IRQs, preserve all other enabled IRQs,
346          * write 0 to bits 0-6 to ack all triggered IRQs.
347          */
348         tmp &= 0xffffff00 & ~LDINTR_VEE;
349         lcdc_write(priv, _LDINTR, tmp);
350
351         /* figure out if this interrupt is for main or sub lcd */
352         is_sub = (lcdc_read(priv, _LDSR) & (1 << 10)) ? 1 : 0;
353
354         /* wake up channel and disable clocks */
355         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
356                 ch = &priv->ch[k];
357
358                 if (!ch->enabled)
359                         continue;
360
361                 /* Frame Start */
362                 if (ldintr & LDINTR_FS) {
363                         if (is_sub == lcdc_chan_is_sublcd(ch)) {
364                                 ch->frame_end = 1;
365                                 wake_up(&ch->frame_end_wait);
366
367                                 sh_mobile_lcdc_clk_off(priv);
368                         }
369                 }
370
371                 /* VSYNC End */
372                 if (ldintr & LDINTR_VES)
373                         complete(&ch->vsync_completion);
374         }
375
376         return IRQ_HANDLED;
377 }
378
379 static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv,
380                                       int start)
381 {
382         unsigned long tmp = lcdc_read(priv, _LDCNT2R);
383         int k;
384
385         /* start or stop the lcdc */
386         if (start)
387                 lcdc_write(priv, _LDCNT2R, tmp | START_LCDC);
388         else
389                 lcdc_write(priv, _LDCNT2R, tmp & ~START_LCDC);
390
391         /* wait until power is applied/stopped on all channels */
392         for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
393                 if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled)
394                         while (1) {
395                                 tmp = lcdc_read_chan(&priv->ch[k], LDPMR) & 3;
396                                 if (start && tmp == 3)
397                                         break;
398                                 if (!start && tmp == 0)
399                                         break;
400                                 cpu_relax();
401                         }
402
403         if (!start)
404                 lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */
405 }
406
407 static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch)
408 {
409         struct fb_var_screeninfo *var = &ch->info->var, *display_var = &ch->display_var;
410         unsigned long h_total, hsync_pos, display_h_total;
411         u32 tmp;
412
413         tmp = ch->ldmt1r_value;
414         tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : 1 << 28;
415         tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : 1 << 27;
416         tmp |= (ch->cfg.flags & LCDC_FLAGS_DWPOL) ? 1 << 26 : 0;
417         tmp |= (ch->cfg.flags & LCDC_FLAGS_DIPOL) ? 1 << 25 : 0;
418         tmp |= (ch->cfg.flags & LCDC_FLAGS_DAPOL) ? 1 << 24 : 0;
419         tmp |= (ch->cfg.flags & LCDC_FLAGS_HSCNT) ? 1 << 17 : 0;
420         tmp |= (ch->cfg.flags & LCDC_FLAGS_DWCNT) ? 1 << 16 : 0;
421         lcdc_write_chan(ch, LDMT1R, tmp);
422
423         /* setup SYS bus */
424         lcdc_write_chan(ch, LDMT2R, ch->cfg.sys_bus_cfg.ldmt2r);
425         lcdc_write_chan(ch, LDMT3R, ch->cfg.sys_bus_cfg.ldmt3r);
426
427         /* horizontal configuration */
428         h_total = display_var->xres + display_var->hsync_len +
429                 display_var->left_margin + display_var->right_margin;
430         tmp = h_total / 8; /* HTCN */
431         tmp |= (min(display_var->xres, var->xres) / 8) << 16; /* HDCN */
432         lcdc_write_chan(ch, LDHCNR, tmp);
433
434         hsync_pos = display_var->xres + display_var->right_margin;
435         tmp = hsync_pos / 8; /* HSYNP */
436         tmp |= (display_var->hsync_len / 8) << 16; /* HSYNW */
437         lcdc_write_chan(ch, LDHSYNR, tmp);
438
439         /* vertical configuration */
440         tmp = display_var->yres + display_var->vsync_len +
441                 display_var->upper_margin + display_var->lower_margin; /* VTLN */
442         tmp |= min(display_var->yres, var->yres) << 16; /* VDLN */
443         lcdc_write_chan(ch, LDVLNR, tmp);
444
445         tmp = display_var->yres + display_var->lower_margin; /* VSYNP */
446         tmp |= display_var->vsync_len << 16; /* VSYNW */
447         lcdc_write_chan(ch, LDVSYNR, tmp);
448
449         /* Adjust horizontal synchronisation for HDMI */
450         display_h_total = display_var->xres + display_var->hsync_len +
451                 display_var->left_margin + display_var->right_margin;
452         tmp = ((display_var->xres & 7) << 24) |
453                 ((display_h_total & 7) << 16) |
454                 ((display_var->hsync_len & 7) << 8) |
455                 hsync_pos;
456         lcdc_write_chan(ch, LDHAJR, tmp);
457 }
458
459 static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
460 {
461         struct sh_mobile_lcdc_chan *ch;
462         struct sh_mobile_lcdc_board_cfg *board_cfg;
463         unsigned long tmp;
464         int k, m;
465         int ret = 0;
466
467         /* enable clocks before accessing the hardware */
468         for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
469                 if (priv->ch[k].enabled)
470                         sh_mobile_lcdc_clk_on(priv);
471
472         /* reset */
473         lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LCDC_RESET);
474         lcdc_wait_bit(priv, _LDCNT2R, LCDC_RESET, 0);
475
476         /* enable LCDC channels */
477         tmp = lcdc_read(priv, _LDCNT2R);
478         tmp |= priv->ch[0].enabled;
479         tmp |= priv->ch[1].enabled;
480         lcdc_write(priv, _LDCNT2R, tmp);
481
482         /* read data from external memory, avoid using the BEU for now */
483         lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) & ~DISPLAY_BEU);
484
485         /* stop the lcdc first */
486         sh_mobile_lcdc_start_stop(priv, 0);
487
488         /* configure clocks */
489         tmp = priv->lddckr;
490         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
491                 ch = &priv->ch[k];
492
493                 if (!priv->ch[k].enabled)
494                         continue;
495
496                 m = ch->cfg.clock_divider;
497                 if (!m)
498                         continue;
499
500                 if (m == 1)
501                         m = 1 << 6;
502                 tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
503
504                 /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider denominator */
505                 lcdc_write_chan(ch, LDDCKPAT1R, 0);
506                 lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1);
507         }
508
509         lcdc_write(priv, _LDDCKR, tmp);
510
511         /* start dotclock again */
512         lcdc_write(priv, _LDDCKSTPR, 0);
513         lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0);
514
515         /* interrupts are disabled to begin with */
516         lcdc_write(priv, _LDINTR, 0);
517
518         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
519                 ch = &priv->ch[k];
520
521                 if (!ch->enabled)
522                         continue;
523
524                 sh_mobile_lcdc_geometry(ch);
525
526                 /* power supply */
527                 lcdc_write_chan(ch, LDPMR, 0);
528
529                 board_cfg = &ch->cfg.board_cfg;
530                 if (board_cfg->setup_sys)
531                         ret = board_cfg->setup_sys(board_cfg->board_data, ch,
532                                                    &sh_mobile_lcdc_sys_bus_ops);
533                 if (ret)
534                         return ret;
535         }
536
537         /* word and long word swap */
538         lcdc_write(priv, _LDDDSR, lcdc_read(priv, _LDDDSR) | 6);
539
540         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
541                 ch = &priv->ch[k];
542
543                 if (!priv->ch[k].enabled)
544                         continue;
545
546                 /* set bpp format in PKF[4:0] */
547                 tmp = lcdc_read_chan(ch, LDDFR);
548                 tmp &= ~0x0001001f;
549                 tmp |= (ch->info->var.bits_per_pixel == 16) ? 3 : 0;
550                 lcdc_write_chan(ch, LDDFR, tmp);
551
552                 /* point out our frame buffer */
553                 lcdc_write_chan(ch, LDSA1R, ch->info->fix.smem_start);
554
555                 /* set line size */
556                 lcdc_write_chan(ch, LDMLSR, ch->info->fix.line_length);
557
558                 /* setup deferred io if SYS bus */
559                 tmp = ch->cfg.sys_bus_cfg.deferred_io_msec;
560                 if (ch->ldmt1r_value & (1 << 12) && tmp) {
561                         ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
562                         ch->defio.delay = msecs_to_jiffies(tmp);
563                         ch->info->fbdefio = &ch->defio;
564                         fb_deferred_io_init(ch->info);
565
566                         /* one-shot mode */
567                         lcdc_write_chan(ch, LDSM1R, 1);
568
569                         /* enable "Frame End Interrupt Enable" bit */
570                         lcdc_write(priv, _LDINTR, LDINTR_FE);
571
572                 } else {
573                         /* continuous read mode */
574                         lcdc_write_chan(ch, LDSM1R, 0);
575                 }
576         }
577
578         /* display output */
579         lcdc_write(priv, _LDCNT1R, LCDC_ENABLE);
580
581         /* start the lcdc */
582         sh_mobile_lcdc_start_stop(priv, 1);
583         priv->started = 1;
584
585         /* tell the board code to enable the panel */
586         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
587                 ch = &priv->ch[k];
588                 if (!ch->enabled)
589                         continue;
590
591                 board_cfg = &ch->cfg.board_cfg;
592                 if (try_module_get(board_cfg->owner) && board_cfg->display_on) {
593                         board_cfg->display_on(board_cfg->board_data, ch->info);
594                         module_put(board_cfg->owner);
595                 }
596         }
597
598         return 0;
599 }
600
601 static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
602 {
603         struct sh_mobile_lcdc_chan *ch;
604         struct sh_mobile_lcdc_board_cfg *board_cfg;
605         int k;
606
607         /* clean up deferred io and ask board code to disable panel */
608         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
609                 ch = &priv->ch[k];
610                 if (!ch->enabled)
611                         continue;
612
613                 /* deferred io mode:
614                  * flush frame, and wait for frame end interrupt
615                  * clean up deferred io and enable clock
616                  */
617                 if (ch->info && ch->info->fbdefio) {
618                         ch->frame_end = 0;
619                         schedule_delayed_work(&ch->info->deferred_work, 0);
620                         wait_event(ch->frame_end_wait, ch->frame_end);
621                         fb_deferred_io_cleanup(ch->info);
622                         ch->info->fbdefio = NULL;
623                         sh_mobile_lcdc_clk_on(priv);
624                 }
625
626                 board_cfg = &ch->cfg.board_cfg;
627                 if (try_module_get(board_cfg->owner) && board_cfg->display_off) {
628                         board_cfg->display_off(board_cfg->board_data);
629                         module_put(board_cfg->owner);
630                 }
631         }
632
633         /* stop the lcdc */
634         if (priv->started) {
635                 sh_mobile_lcdc_start_stop(priv, 0);
636                 priv->started = 0;
637         }
638
639         /* stop clocks */
640         for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
641                 if (priv->ch[k].enabled)
642                         sh_mobile_lcdc_clk_off(priv);
643 }
644
645 static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
646 {
647         int ifm, miftyp;
648
649         switch (ch->cfg.interface_type) {
650         case RGB8: ifm = 0; miftyp = 0; break;
651         case RGB9: ifm = 0; miftyp = 4; break;
652         case RGB12A: ifm = 0; miftyp = 5; break;
653         case RGB12B: ifm = 0; miftyp = 6; break;
654         case RGB16: ifm = 0; miftyp = 7; break;
655         case RGB18: ifm = 0; miftyp = 10; break;
656         case RGB24: ifm = 0; miftyp = 11; break;
657         case SYS8A: ifm = 1; miftyp = 0; break;
658         case SYS8B: ifm = 1; miftyp = 1; break;
659         case SYS8C: ifm = 1; miftyp = 2; break;
660         case SYS8D: ifm = 1; miftyp = 3; break;
661         case SYS9: ifm = 1; miftyp = 4; break;
662         case SYS12: ifm = 1; miftyp = 5; break;
663         case SYS16A: ifm = 1; miftyp = 7; break;
664         case SYS16B: ifm = 1; miftyp = 8; break;
665         case SYS16C: ifm = 1; miftyp = 9; break;
666         case SYS18: ifm = 1; miftyp = 10; break;
667         case SYS24: ifm = 1; miftyp = 11; break;
668         default: goto bad;
669         }
670
671         /* SUBLCD only supports SYS interface */
672         if (lcdc_chan_is_sublcd(ch)) {
673                 if (ifm == 0)
674                         goto bad;
675                 else
676                         ifm = 0;
677         }
678
679         ch->ldmt1r_value = (ifm << 12) | miftyp;
680         return 0;
681  bad:
682         return -EINVAL;
683 }
684
685 static int sh_mobile_lcdc_setup_clocks(struct platform_device *pdev,
686                                        int clock_source,
687                                        struct sh_mobile_lcdc_priv *priv)
688 {
689         char *str;
690         int icksel;
691
692         switch (clock_source) {
693         case LCDC_CLK_BUS: str = "bus_clk"; icksel = 0; break;
694         case LCDC_CLK_PERIPHERAL: str = "peripheral_clk"; icksel = 1; break;
695         case LCDC_CLK_EXTERNAL: str = NULL; icksel = 2; break;
696         default:
697                 return -EINVAL;
698         }
699
700         priv->lddckr = icksel << 16;
701
702         if (str) {
703                 priv->dot_clk = clk_get(&pdev->dev, str);
704                 if (IS_ERR(priv->dot_clk)) {
705                         dev_err(&pdev->dev, "cannot get dot clock %s\n", str);
706                         return PTR_ERR(priv->dot_clk);
707                 }
708         }
709
710         /* Runtime PM support involves two step for this driver:
711          * 1) Enable Runtime PM
712          * 2) Force Runtime PM Resume since hardware is accessed from probe()
713          */
714         priv->dev = &pdev->dev;
715         pm_runtime_enable(priv->dev);
716         pm_runtime_resume(priv->dev);
717         return 0;
718 }
719
720 static int sh_mobile_lcdc_setcolreg(u_int regno,
721                                     u_int red, u_int green, u_int blue,
722                                     u_int transp, struct fb_info *info)
723 {
724         u32 *palette = info->pseudo_palette;
725
726         if (regno >= PALETTE_NR)
727                 return -EINVAL;
728
729         /* only FB_VISUAL_TRUECOLOR supported */
730
731         red >>= 16 - info->var.red.length;
732         green >>= 16 - info->var.green.length;
733         blue >>= 16 - info->var.blue.length;
734         transp >>= 16 - info->var.transp.length;
735
736         palette[regno] = (red << info->var.red.offset) |
737           (green << info->var.green.offset) |
738           (blue << info->var.blue.offset) |
739           (transp << info->var.transp.offset);
740
741         return 0;
742 }
743
744 static struct fb_fix_screeninfo sh_mobile_lcdc_fix  = {
745         .id =           "SH Mobile LCDC",
746         .type =         FB_TYPE_PACKED_PIXELS,
747         .visual =       FB_VISUAL_TRUECOLOR,
748         .accel =        FB_ACCEL_NONE,
749         .xpanstep =     0,
750         .ypanstep =     1,
751         .ywrapstep =    0,
752 };
753
754 static void sh_mobile_lcdc_fillrect(struct fb_info *info,
755                                     const struct fb_fillrect *rect)
756 {
757         sys_fillrect(info, rect);
758         sh_mobile_lcdc_deferred_io_touch(info);
759 }
760
761 static void sh_mobile_lcdc_copyarea(struct fb_info *info,
762                                     const struct fb_copyarea *area)
763 {
764         sys_copyarea(info, area);
765         sh_mobile_lcdc_deferred_io_touch(info);
766 }
767
768 static void sh_mobile_lcdc_imageblit(struct fb_info *info,
769                                      const struct fb_image *image)
770 {
771         sys_imageblit(info, image);
772         sh_mobile_lcdc_deferred_io_touch(info);
773 }
774
775 static int sh_mobile_fb_pan_display(struct fb_var_screeninfo *var,
776                                      struct fb_info *info)
777 {
778         struct sh_mobile_lcdc_chan *ch = info->par;
779         struct sh_mobile_lcdc_priv *priv = ch->lcdc;
780         unsigned long ldrcntr;
781         unsigned long new_pan_offset;
782
783         new_pan_offset = (var->yoffset * info->fix.line_length) +
784                 (var->xoffset * (info->var.bits_per_pixel / 8));
785
786         if (new_pan_offset == ch->pan_offset)
787                 return 0;       /* No change, do nothing */
788
789         ldrcntr = lcdc_read(priv, _LDRCNTR);
790
791         /* Set the source address for the next refresh */
792         lcdc_write_chan_mirror(ch, LDSA1R, ch->dma_handle + new_pan_offset);
793         if (lcdc_chan_is_sublcd(ch))
794                 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
795         else
796                 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS);
797
798         ch->pan_offset = new_pan_offset;
799
800         sh_mobile_lcdc_deferred_io_touch(info);
801
802         return 0;
803 }
804
805 static int sh_mobile_wait_for_vsync(struct fb_info *info)
806 {
807         struct sh_mobile_lcdc_chan *ch = info->par;
808         unsigned long ldintr;
809         int ret;
810
811         /* Enable VSync End interrupt */
812         ldintr = lcdc_read(ch->lcdc, _LDINTR);
813         ldintr |= LDINTR_VEE;
814         lcdc_write(ch->lcdc, _LDINTR, ldintr);
815
816         ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion,
817                                                         msecs_to_jiffies(100));
818         if (!ret)
819                 return -ETIMEDOUT;
820
821         return 0;
822 }
823
824 static int sh_mobile_ioctl(struct fb_info *info, unsigned int cmd,
825                        unsigned long arg)
826 {
827         int retval;
828
829         switch (cmd) {
830         case FBIO_WAITFORVSYNC:
831                 retval = sh_mobile_wait_for_vsync(info);
832                 break;
833
834         default:
835                 retval = -ENOIOCTLCMD;
836                 break;
837         }
838         return retval;
839 }
840
841 static void sh_mobile_fb_reconfig(struct fb_info *info)
842 {
843         struct sh_mobile_lcdc_chan *ch = info->par;
844         struct fb_videomode mode1, mode2;
845         struct fb_event event;
846         int evnt = FB_EVENT_MODE_CHANGE_ALL;
847
848         if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par))
849                 /* More framebuffer users are active */
850                 return;
851
852         fb_var_to_videomode(&mode1, &ch->display_var);
853         fb_var_to_videomode(&mode2, &info->var);
854
855         if (fb_mode_is_equal(&mode1, &mode2))
856                 return;
857
858         /* Display has been re-plugged, framebuffer is free now, reconfigure */
859         if (fb_set_var(info, &ch->display_var) < 0)
860                 /* Couldn't reconfigure, hopefully, can continue as before */
861                 return;
862
863         info->fix.line_length = mode1.xres * (ch->cfg.bpp / 8);
864
865         /*
866          * fb_set_var() calls the notifier change internally, only if
867          * FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a
868          * user event, we have to call the chain ourselves.
869          */
870         event.info = info;
871         event.data = &mode1;
872         fb_notifier_call_chain(evnt, &event);
873 }
874
875 /*
876  * Locking: both .fb_release() and .fb_open() are called with info->lock held if
877  * user == 1, or with console sem held, if user == 0.
878  */
879 static int sh_mobile_release(struct fb_info *info, int user)
880 {
881         struct sh_mobile_lcdc_chan *ch = info->par;
882
883         mutex_lock(&ch->open_lock);
884         dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
885
886         ch->use_count--;
887
888         /* Nothing to reconfigure, when called from fbcon */
889         if (user) {
890                 acquire_console_sem();
891                 sh_mobile_fb_reconfig(info);
892                 release_console_sem();
893         }
894
895         mutex_unlock(&ch->open_lock);
896
897         return 0;
898 }
899
900 static int sh_mobile_open(struct fb_info *info, int user)
901 {
902         struct sh_mobile_lcdc_chan *ch = info->par;
903
904         mutex_lock(&ch->open_lock);
905         ch->use_count++;
906
907         dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
908         mutex_unlock(&ch->open_lock);
909
910         return 0;
911 }
912
913 static int sh_mobile_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
914 {
915         struct sh_mobile_lcdc_chan *ch = info->par;
916
917         if (var->xres > MAX_XRES || var->yres > MAX_YRES ||
918             var->xres * var->yres * (ch->cfg.bpp / 8) * 2 > info->fix.smem_len) {
919                 dev_warn(info->dev, "Invalid info: %u-%u-%u-%u x %u-%u-%u-%u @ %ukHz!\n",
920                          var->left_margin, var->xres, var->right_margin, var->hsync_len,
921                          var->upper_margin, var->yres, var->lower_margin, var->vsync_len,
922                          PICOS2KHZ(var->pixclock));
923                 return -EINVAL;
924         }
925         return 0;
926 }
927
928 static struct fb_ops sh_mobile_lcdc_ops = {
929         .owner          = THIS_MODULE,
930         .fb_setcolreg   = sh_mobile_lcdc_setcolreg,
931         .fb_read        = fb_sys_read,
932         .fb_write       = fb_sys_write,
933         .fb_fillrect    = sh_mobile_lcdc_fillrect,
934         .fb_copyarea    = sh_mobile_lcdc_copyarea,
935         .fb_imageblit   = sh_mobile_lcdc_imageblit,
936         .fb_pan_display = sh_mobile_fb_pan_display,
937         .fb_ioctl       = sh_mobile_ioctl,
938         .fb_open        = sh_mobile_open,
939         .fb_release     = sh_mobile_release,
940         .fb_check_var   = sh_mobile_check_var,
941 };
942
943 static int sh_mobile_lcdc_set_bpp(struct fb_var_screeninfo *var, int bpp)
944 {
945         switch (bpp) {
946         case 16: /* PKF[4:0] = 00011 - RGB 565 */
947                 var->red.offset = 11;
948                 var->red.length = 5;
949                 var->green.offset = 5;
950                 var->green.length = 6;
951                 var->blue.offset = 0;
952                 var->blue.length = 5;
953                 var->transp.offset = 0;
954                 var->transp.length = 0;
955                 break;
956
957         case 32: /* PKF[4:0] = 00000 - RGB 888
958                   * sh7722 pdf says 00RRGGBB but reality is GGBB00RR
959                   * this may be because LDDDSR has word swap enabled..
960                   */
961                 var->red.offset = 0;
962                 var->red.length = 8;
963                 var->green.offset = 24;
964                 var->green.length = 8;
965                 var->blue.offset = 16;
966                 var->blue.length = 8;
967                 var->transp.offset = 0;
968                 var->transp.length = 0;
969                 break;
970         default:
971                 return -EINVAL;
972         }
973         var->bits_per_pixel = bpp;
974         var->red.msb_right = 0;
975         var->green.msb_right = 0;
976         var->blue.msb_right = 0;
977         var->transp.msb_right = 0;
978         return 0;
979 }
980
981 static int sh_mobile_lcdc_suspend(struct device *dev)
982 {
983         struct platform_device *pdev = to_platform_device(dev);
984
985         sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
986         return 0;
987 }
988
989 static int sh_mobile_lcdc_resume(struct device *dev)
990 {
991         struct platform_device *pdev = to_platform_device(dev);
992
993         return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
994 }
995
996 static int sh_mobile_lcdc_runtime_suspend(struct device *dev)
997 {
998         struct platform_device *pdev = to_platform_device(dev);
999         struct sh_mobile_lcdc_priv *p = platform_get_drvdata(pdev);
1000         struct sh_mobile_lcdc_chan *ch;
1001         int k, n;
1002
1003         /* save per-channel registers */
1004         for (k = 0; k < ARRAY_SIZE(p->ch); k++) {
1005                 ch = &p->ch[k];
1006                 if (!ch->enabled)
1007                         continue;
1008                 for (n = 0; n < NR_CH_REGS; n++)
1009                         ch->saved_ch_regs[n] = lcdc_read_chan(ch, n);
1010         }
1011
1012         /* save shared registers */
1013         for (n = 0; n < NR_SHARED_REGS; n++)
1014                 p->saved_shared_regs[n] = lcdc_read(p, lcdc_shared_regs[n]);
1015
1016         /* turn off LCDC hardware */
1017         lcdc_write(p, _LDCNT1R, 0);
1018         return 0;
1019 }
1020
1021 static int sh_mobile_lcdc_runtime_resume(struct device *dev)
1022 {
1023         struct platform_device *pdev = to_platform_device(dev);
1024         struct sh_mobile_lcdc_priv *p = platform_get_drvdata(pdev);
1025         struct sh_mobile_lcdc_chan *ch;
1026         int k, n;
1027
1028         /* restore per-channel registers */
1029         for (k = 0; k < ARRAY_SIZE(p->ch); k++) {
1030                 ch = &p->ch[k];
1031                 if (!ch->enabled)
1032                         continue;
1033                 for (n = 0; n < NR_CH_REGS; n++)
1034                         lcdc_write_chan(ch, n, ch->saved_ch_regs[n]);
1035         }
1036
1037         /* restore shared registers */
1038         for (n = 0; n < NR_SHARED_REGS; n++)
1039                 lcdc_write(p, lcdc_shared_regs[n], p->saved_shared_regs[n]);
1040
1041         return 0;
1042 }
1043
1044 static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
1045         .suspend = sh_mobile_lcdc_suspend,
1046         .resume = sh_mobile_lcdc_resume,
1047         .runtime_suspend = sh_mobile_lcdc_runtime_suspend,
1048         .runtime_resume = sh_mobile_lcdc_runtime_resume,
1049 };
1050
1051 /* locking: called with info->lock held */
1052 static int sh_mobile_lcdc_notify(struct notifier_block *nb,
1053                                  unsigned long action, void *data)
1054 {
1055         struct fb_event *event = data;
1056         struct fb_info *info = event->info;
1057         struct sh_mobile_lcdc_chan *ch = info->par;
1058         struct sh_mobile_lcdc_board_cfg *board_cfg = &ch->cfg.board_cfg;
1059         int ret;
1060
1061         if (&ch->lcdc->notifier != nb)
1062                 return NOTIFY_DONE;
1063
1064         dev_dbg(info->dev, "%s(): action = %lu, data = %p\n",
1065                 __func__, action, event->data);
1066
1067         switch(action) {
1068         case FB_EVENT_SUSPEND:
1069                 if (try_module_get(board_cfg->owner) && board_cfg->display_off) {
1070                         board_cfg->display_off(board_cfg->board_data);
1071                         module_put(board_cfg->owner);
1072                 }
1073                 pm_runtime_put(info->device);
1074                 sh_mobile_lcdc_stop(ch->lcdc);
1075                 break;
1076         case FB_EVENT_RESUME:
1077                 mutex_lock(&ch->open_lock);
1078                 sh_mobile_fb_reconfig(info);
1079                 mutex_unlock(&ch->open_lock);
1080
1081                 /* HDMI must be enabled before LCDC configuration */
1082                 if (try_module_get(board_cfg->owner) && board_cfg->display_on) {
1083                         board_cfg->display_on(board_cfg->board_data, info);
1084                         module_put(board_cfg->owner);
1085                 }
1086
1087                 ret = sh_mobile_lcdc_start(ch->lcdc);
1088                 if (!ret)
1089                         pm_runtime_get_sync(info->device);
1090         }
1091
1092         return NOTIFY_OK;
1093 }
1094
1095 static int sh_mobile_lcdc_remove(struct platform_device *pdev);
1096
1097 static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev)
1098 {
1099         struct fb_info *info;
1100         struct sh_mobile_lcdc_priv *priv;
1101         struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data;
1102         struct resource *res;
1103         int error;
1104         void *buf;
1105         int i, j;
1106
1107         if (!pdata) {
1108                 dev_err(&pdev->dev, "no platform data defined\n");
1109                 return -EINVAL;
1110         }
1111
1112         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1113         i = platform_get_irq(pdev, 0);
1114         if (!res || i < 0) {
1115                 dev_err(&pdev->dev, "cannot get platform resources\n");
1116                 return -ENOENT;
1117         }
1118
1119         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
1120         if (!priv) {
1121                 dev_err(&pdev->dev, "cannot allocate device data\n");
1122                 return -ENOMEM;
1123         }
1124
1125         platform_set_drvdata(pdev, priv);
1126
1127         error = request_irq(i, sh_mobile_lcdc_irq, IRQF_DISABLED,
1128                             dev_name(&pdev->dev), priv);
1129         if (error) {
1130                 dev_err(&pdev->dev, "unable to request irq\n");
1131                 goto err1;
1132         }
1133
1134         priv->irq = i;
1135         atomic_set(&priv->hw_usecnt, -1);
1136
1137         j = 0;
1138         for (i = 0; i < ARRAY_SIZE(pdata->ch); i++) {
1139                 struct sh_mobile_lcdc_chan *ch = priv->ch + j;
1140
1141                 ch->lcdc = priv;
1142                 memcpy(&ch->cfg, &pdata->ch[i], sizeof(pdata->ch[i]));
1143
1144                 error = sh_mobile_lcdc_check_interface(ch);
1145                 if (error) {
1146                         dev_err(&pdev->dev, "unsupported interface type\n");
1147                         goto err1;
1148                 }
1149                 init_waitqueue_head(&ch->frame_end_wait);
1150                 init_completion(&ch->vsync_completion);
1151                 ch->pan_offset = 0;
1152
1153                 switch (pdata->ch[i].chan) {
1154                 case LCDC_CHAN_MAINLCD:
1155                         ch->enabled = 1 << 1;
1156                         ch->reg_offs = lcdc_offs_mainlcd;
1157                         j++;
1158                         break;
1159                 case LCDC_CHAN_SUBLCD:
1160                         ch->enabled = 1 << 2;
1161                         ch->reg_offs = lcdc_offs_sublcd;
1162                         j++;
1163                         break;
1164                 }
1165         }
1166
1167         if (!j) {
1168                 dev_err(&pdev->dev, "no channels defined\n");
1169                 error = -EINVAL;
1170                 goto err1;
1171         }
1172
1173         priv->base = ioremap_nocache(res->start, resource_size(res));
1174         if (!priv->base)
1175                 goto err1;
1176
1177         error = sh_mobile_lcdc_setup_clocks(pdev, pdata->clock_source, priv);
1178         if (error) {
1179                 dev_err(&pdev->dev, "unable to setup clocks\n");
1180                 goto err1;
1181         }
1182
1183         for (i = 0; i < j; i++) {
1184                 struct fb_var_screeninfo *var;
1185                 const struct fb_videomode *lcd_cfg, *max_cfg = NULL;
1186                 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
1187                 struct sh_mobile_lcdc_chan_cfg *cfg = &ch->cfg;
1188                 const struct fb_videomode *mode = cfg->lcd_cfg;
1189                 unsigned long max_size = 0;
1190                 int k;
1191                 int num_cfg;
1192
1193                 ch->info = framebuffer_alloc(0, &pdev->dev);
1194                 if (!ch->info) {
1195                         dev_err(&pdev->dev, "unable to allocate fb_info\n");
1196                         error = -ENOMEM;
1197                         break;
1198                 }
1199
1200                 info = ch->info;
1201                 var = &info->var;
1202                 info->fbops = &sh_mobile_lcdc_ops;
1203                 info->par = ch;
1204
1205                 mutex_init(&ch->open_lock);
1206
1207                 for (k = 0, lcd_cfg = mode;
1208                      k < cfg->num_cfg && lcd_cfg;
1209                      k++, lcd_cfg++) {
1210                         unsigned long size = lcd_cfg->yres * lcd_cfg->xres;
1211
1212                         if (size > max_size) {
1213                                 max_cfg = lcd_cfg;
1214                                 max_size = size;
1215                         }
1216                 }
1217
1218                 if (!mode)
1219                         max_size = MAX_XRES * MAX_YRES;
1220                 else if (max_cfg)
1221                         dev_dbg(&pdev->dev, "Found largest videomode %ux%u\n",
1222                                 max_cfg->xres, max_cfg->yres);
1223
1224                 info->fix = sh_mobile_lcdc_fix;
1225                 info->fix.smem_len = max_size * (cfg->bpp / 8) * 2;
1226
1227                 if (!mode) {
1228                         mode = &default_720p;
1229                         num_cfg = 1;
1230                 } else {
1231                         num_cfg = cfg->num_cfg;
1232                 }
1233
1234                 fb_videomode_to_modelist(mode, num_cfg, &info->modelist);
1235
1236                 fb_videomode_to_var(var, mode);
1237                 var->width = cfg->lcd_size_cfg.width;
1238                 var->height = cfg->lcd_size_cfg.height;
1239                 /* Default Y virtual resolution is 2x panel size */
1240                 var->yres_virtual = var->yres * 2;
1241                 var->activate = FB_ACTIVATE_NOW;
1242
1243                 error = sh_mobile_lcdc_set_bpp(var, cfg->bpp);
1244                 if (error)
1245                         break;
1246
1247                 buf = dma_alloc_coherent(&pdev->dev, info->fix.smem_len,
1248                                          &ch->dma_handle, GFP_KERNEL);
1249                 if (!buf) {
1250                         dev_err(&pdev->dev, "unable to allocate buffer\n");
1251                         error = -ENOMEM;
1252                         break;
1253                 }
1254
1255                 info->pseudo_palette = &ch->pseudo_palette;
1256                 info->flags = FBINFO_FLAG_DEFAULT;
1257
1258                 error = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
1259                 if (error < 0) {
1260                         dev_err(&pdev->dev, "unable to allocate cmap\n");
1261                         dma_free_coherent(&pdev->dev, info->fix.smem_len,
1262                                           buf, ch->dma_handle);
1263                         break;
1264                 }
1265
1266                 info->fix.smem_start = ch->dma_handle;
1267                 info->fix.line_length = var->xres * (cfg->bpp / 8);
1268                 info->screen_base = buf;
1269                 info->device = &pdev->dev;
1270                 ch->display_var = *var;
1271         }
1272
1273         if (error)
1274                 goto err1;
1275
1276         error = sh_mobile_lcdc_start(priv);
1277         if (error) {
1278                 dev_err(&pdev->dev, "unable to start hardware\n");
1279                 goto err1;
1280         }
1281
1282         for (i = 0; i < j; i++) {
1283                 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
1284
1285                 info = ch->info;
1286
1287                 if (info->fbdefio) {
1288                         ch->sglist = vmalloc(sizeof(struct scatterlist) *
1289                                         info->fix.smem_len >> PAGE_SHIFT);
1290                         if (!ch->sglist) {
1291                                 dev_err(&pdev->dev, "cannot allocate sglist\n");
1292                                 goto err1;
1293                         }
1294                 }
1295
1296                 error = register_framebuffer(info);
1297                 if (error < 0)
1298                         goto err1;
1299
1300                 dev_info(info->dev,
1301                          "registered %s/%s as %dx%d %dbpp.\n",
1302                          pdev->name,
1303                          (ch->cfg.chan == LCDC_CHAN_MAINLCD) ?
1304                          "mainlcd" : "sublcd",
1305                          info->var.xres, info->var.yres,
1306                          ch->cfg.bpp);
1307
1308                 /* deferred io mode: disable clock to save power */
1309                 if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED)
1310                         sh_mobile_lcdc_clk_off(priv);
1311         }
1312
1313         /* Failure ignored */
1314         priv->notifier.notifier_call = sh_mobile_lcdc_notify;
1315         fb_register_client(&priv->notifier);
1316
1317         return 0;
1318 err1:
1319         sh_mobile_lcdc_remove(pdev);
1320
1321         return error;
1322 }
1323
1324 static int sh_mobile_lcdc_remove(struct platform_device *pdev)
1325 {
1326         struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
1327         struct fb_info *info;
1328         int i;
1329
1330         fb_unregister_client(&priv->notifier);
1331
1332         for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
1333                 if (priv->ch[i].info && priv->ch[i].info->dev)
1334                         unregister_framebuffer(priv->ch[i].info);
1335
1336         sh_mobile_lcdc_stop(priv);
1337
1338         for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
1339                 info = priv->ch[i].info;
1340
1341                 if (!info || !info->device)
1342                         continue;
1343
1344                 if (priv->ch[i].sglist)
1345                         vfree(priv->ch[i].sglist);
1346
1347                 if (info->screen_base)
1348                         dma_free_coherent(&pdev->dev, info->fix.smem_len,
1349                                           info->screen_base,
1350                                           priv->ch[i].dma_handle);
1351                 fb_dealloc_cmap(&info->cmap);
1352                 framebuffer_release(info);
1353         }
1354
1355         if (priv->dot_clk)
1356                 clk_put(priv->dot_clk);
1357
1358         if (priv->dev)
1359                 pm_runtime_disable(priv->dev);
1360
1361         if (priv->base)
1362                 iounmap(priv->base);
1363
1364         if (priv->irq)
1365                 free_irq(priv->irq, priv);
1366         kfree(priv);
1367         return 0;
1368 }
1369
1370 static struct platform_driver sh_mobile_lcdc_driver = {
1371         .driver         = {
1372                 .name           = "sh_mobile_lcdc_fb",
1373                 .owner          = THIS_MODULE,
1374                 .pm             = &sh_mobile_lcdc_dev_pm_ops,
1375         },
1376         .probe          = sh_mobile_lcdc_probe,
1377         .remove         = sh_mobile_lcdc_remove,
1378 };
1379
1380 static int __init sh_mobile_lcdc_init(void)
1381 {
1382         return platform_driver_register(&sh_mobile_lcdc_driver);
1383 }
1384
1385 static void __exit sh_mobile_lcdc_exit(void)
1386 {
1387         platform_driver_unregister(&sh_mobile_lcdc_driver);
1388 }
1389
1390 module_init(sh_mobile_lcdc_init);
1391 module_exit(sh_mobile_lcdc_exit);
1392
1393 MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
1394 MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
1395 MODULE_LICENSE("GPL v2");