Merge master.kernel.org:/pub/scm/linux/kernel/git/lethal/genesis-2.6 into devel-stable
[pandora-kernel.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 DEFAULT_XRES 1280
58 #define DEFAULT_YRES 1024
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 = 200,
119         .right_margin = 88,
120         .hsync_len = 48,
121
122         .upper_margin = 20,
123         .lower_margin = 5,
124         .vsync_len = 5,
125
126         .pixclock = 13468,
127         .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT,
128 };
129
130 struct sh_mobile_lcdc_priv {
131         void __iomem *base;
132         int irq;
133         atomic_t hw_usecnt;
134         struct device *dev;
135         struct clk *dot_clk;
136         unsigned long lddckr;
137         struct sh_mobile_lcdc_chan ch[2];
138         struct notifier_block notifier;
139         unsigned long saved_shared_regs[NR_SHARED_REGS];
140         int started;
141 };
142
143 static bool banked(int reg_nr)
144 {
145         switch (reg_nr) {
146         case LDMT1R:
147         case LDMT2R:
148         case LDMT3R:
149         case LDDFR:
150         case LDSM1R:
151         case LDSA1R:
152         case LDMLSR:
153         case LDHCNR:
154         case LDHSYNR:
155         case LDVLNR:
156         case LDVSYNR:
157                 return true;
158         }
159         return false;
160 }
161
162 static void lcdc_write_chan(struct sh_mobile_lcdc_chan *chan,
163                             int reg_nr, unsigned long data)
164 {
165         iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr]);
166         if (banked(reg_nr))
167                 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
168                           SIDE_B_OFFSET);
169 }
170
171 static void lcdc_write_chan_mirror(struct sh_mobile_lcdc_chan *chan,
172                             int reg_nr, unsigned long data)
173 {
174         iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
175                   MIRROR_OFFSET);
176 }
177
178 static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan *chan,
179                                     int reg_nr)
180 {
181         return ioread32(chan->lcdc->base + chan->reg_offs[reg_nr]);
182 }
183
184 static void lcdc_write(struct sh_mobile_lcdc_priv *priv,
185                        unsigned long reg_offs, unsigned long data)
186 {
187         iowrite32(data, priv->base + reg_offs);
188 }
189
190 static unsigned long lcdc_read(struct sh_mobile_lcdc_priv *priv,
191                                unsigned long reg_offs)
192 {
193         return ioread32(priv->base + reg_offs);
194 }
195
196 static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv,
197                           unsigned long reg_offs,
198                           unsigned long mask, unsigned long until)
199 {
200         while ((lcdc_read(priv, reg_offs) & mask) != until)
201                 cpu_relax();
202 }
203
204 static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan)
205 {
206         return chan->cfg.chan == LCDC_CHAN_SUBLCD;
207 }
208
209 static void lcdc_sys_write_index(void *handle, unsigned long data)
210 {
211         struct sh_mobile_lcdc_chan *ch = handle;
212
213         lcdc_write(ch->lcdc, _LDDWD0R, data | 0x10000000);
214         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
215         lcdc_write(ch->lcdc, _LDDWAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
216         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
217 }
218
219 static void lcdc_sys_write_data(void *handle, unsigned long data)
220 {
221         struct sh_mobile_lcdc_chan *ch = handle;
222
223         lcdc_write(ch->lcdc, _LDDWD0R, data | 0x11000000);
224         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
225         lcdc_write(ch->lcdc, _LDDWAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
226         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
227 }
228
229 static unsigned long lcdc_sys_read_data(void *handle)
230 {
231         struct sh_mobile_lcdc_chan *ch = handle;
232
233         lcdc_write(ch->lcdc, _LDDRDR, 0x01000000);
234         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
235         lcdc_write(ch->lcdc, _LDDRAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
236         udelay(1);
237         lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
238
239         return lcdc_read(ch->lcdc, _LDDRDR) & 0x3ffff;
240 }
241
242 struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = {
243         lcdc_sys_write_index,
244         lcdc_sys_write_data,
245         lcdc_sys_read_data,
246 };
247
248 static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv)
249 {
250         if (atomic_inc_and_test(&priv->hw_usecnt)) {
251                 pm_runtime_get_sync(priv->dev);
252                 if (priv->dot_clk)
253                         clk_enable(priv->dot_clk);
254         }
255 }
256
257 static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv)
258 {
259         if (atomic_sub_return(1, &priv->hw_usecnt) == -1) {
260                 if (priv->dot_clk)
261                         clk_disable(priv->dot_clk);
262                 pm_runtime_put(priv->dev);
263         }
264 }
265
266 static int sh_mobile_lcdc_sginit(struct fb_info *info,
267                                   struct list_head *pagelist)
268 {
269         struct sh_mobile_lcdc_chan *ch = info->par;
270         unsigned int nr_pages_max = info->fix.smem_len >> PAGE_SHIFT;
271         struct page *page;
272         int nr_pages = 0;
273
274         sg_init_table(ch->sglist, nr_pages_max);
275
276         list_for_each_entry(page, pagelist, lru)
277                 sg_set_page(&ch->sglist[nr_pages++], page, PAGE_SIZE, 0);
278
279         return nr_pages;
280 }
281
282 static void sh_mobile_lcdc_deferred_io(struct fb_info *info,
283                                        struct list_head *pagelist)
284 {
285         struct sh_mobile_lcdc_chan *ch = info->par;
286         struct sh_mobile_lcdc_board_cfg *bcfg = &ch->cfg.board_cfg;
287
288         /* enable clocks before accessing hardware */
289         sh_mobile_lcdc_clk_on(ch->lcdc);
290
291         /*
292          * It's possible to get here without anything on the pagelist via
293          * sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync()
294          * invocation. In the former case, the acceleration routines are
295          * stepped in to when using the framebuffer console causing the
296          * workqueue to be scheduled without any dirty pages on the list.
297          *
298          * Despite this, a panel update is still needed given that the
299          * acceleration routines have their own methods for writing in
300          * that still need to be updated.
301          *
302          * The fsync() and empty pagelist case could be optimized for,
303          * but we don't bother, as any application exhibiting such
304          * behaviour is fundamentally broken anyways.
305          */
306         if (!list_empty(pagelist)) {
307                 unsigned int nr_pages = sh_mobile_lcdc_sginit(info, pagelist);
308
309                 /* trigger panel update */
310                 dma_map_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
311                 if (bcfg->start_transfer)
312                         bcfg->start_transfer(bcfg->board_data, ch,
313                                              &sh_mobile_lcdc_sys_bus_ops);
314                 lcdc_write_chan(ch, LDSM2R, 1);
315                 dma_unmap_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
316         } else {
317                 if (bcfg->start_transfer)
318                         bcfg->start_transfer(bcfg->board_data, ch,
319                                              &sh_mobile_lcdc_sys_bus_ops);
320                 lcdc_write_chan(ch, LDSM2R, 1);
321         }
322 }
323
324 static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info)
325 {
326         struct fb_deferred_io *fbdefio = info->fbdefio;
327
328         if (fbdefio)
329                 schedule_delayed_work(&info->deferred_work, fbdefio->delay);
330 }
331
332 static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
333 {
334         struct sh_mobile_lcdc_priv *priv = data;
335         struct sh_mobile_lcdc_chan *ch;
336         unsigned long tmp;
337         unsigned long ldintr;
338         int is_sub;
339         int k;
340
341         /* acknowledge interrupt */
342         ldintr = tmp = lcdc_read(priv, _LDINTR);
343         /*
344          * disable further VSYNC End IRQs, preserve all other enabled IRQs,
345          * write 0 to bits 0-6 to ack all triggered IRQs.
346          */
347         tmp &= 0xffffff00 & ~LDINTR_VEE;
348         lcdc_write(priv, _LDINTR, tmp);
349
350         /* figure out if this interrupt is for main or sub lcd */
351         is_sub = (lcdc_read(priv, _LDSR) & (1 << 10)) ? 1 : 0;
352
353         /* wake up channel and disable clocks */
354         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
355                 ch = &priv->ch[k];
356
357                 if (!ch->enabled)
358                         continue;
359
360                 /* Frame Start */
361                 if (ldintr & LDINTR_FS) {
362                         if (is_sub == lcdc_chan_is_sublcd(ch)) {
363                                 ch->frame_end = 1;
364                                 wake_up(&ch->frame_end_wait);
365
366                                 sh_mobile_lcdc_clk_off(priv);
367                         }
368                 }
369
370                 /* VSYNC End */
371                 if (ldintr & LDINTR_VES)
372                         complete(&ch->vsync_completion);
373         }
374
375         return IRQ_HANDLED;
376 }
377
378 static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv,
379                                       int start)
380 {
381         unsigned long tmp = lcdc_read(priv, _LDCNT2R);
382         int k;
383
384         /* start or stop the lcdc */
385         if (start)
386                 lcdc_write(priv, _LDCNT2R, tmp | START_LCDC);
387         else
388                 lcdc_write(priv, _LDCNT2R, tmp & ~START_LCDC);
389
390         /* wait until power is applied/stopped on all channels */
391         for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
392                 if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled)
393                         while (1) {
394                                 tmp = lcdc_read_chan(&priv->ch[k], LDPMR) & 3;
395                                 if (start && tmp == 3)
396                                         break;
397                                 if (!start && tmp == 0)
398                                         break;
399                                 cpu_relax();
400                         }
401
402         if (!start)
403                 lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */
404 }
405
406 static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch)
407 {
408         struct fb_var_screeninfo *var = &ch->info->var, *display_var = &ch->display_var;
409         unsigned long h_total, hsync_pos, display_h_total;
410         u32 tmp;
411
412         tmp = ch->ldmt1r_value;
413         tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : 1 << 28;
414         tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : 1 << 27;
415         tmp |= (ch->cfg.flags & LCDC_FLAGS_DWPOL) ? 1 << 26 : 0;
416         tmp |= (ch->cfg.flags & LCDC_FLAGS_DIPOL) ? 1 << 25 : 0;
417         tmp |= (ch->cfg.flags & LCDC_FLAGS_DAPOL) ? 1 << 24 : 0;
418         tmp |= (ch->cfg.flags & LCDC_FLAGS_HSCNT) ? 1 << 17 : 0;
419         tmp |= (ch->cfg.flags & LCDC_FLAGS_DWCNT) ? 1 << 16 : 0;
420         lcdc_write_chan(ch, LDMT1R, tmp);
421
422         /* setup SYS bus */
423         lcdc_write_chan(ch, LDMT2R, ch->cfg.sys_bus_cfg.ldmt2r);
424         lcdc_write_chan(ch, LDMT3R, ch->cfg.sys_bus_cfg.ldmt3r);
425
426         /* horizontal configuration */
427         h_total = display_var->xres + display_var->hsync_len +
428                 display_var->left_margin + display_var->right_margin;
429         tmp = h_total / 8; /* HTCN */
430         tmp |= (min(display_var->xres, var->xres) / 8) << 16; /* HDCN */
431         lcdc_write_chan(ch, LDHCNR, tmp);
432
433         hsync_pos = display_var->xres + display_var->right_margin;
434         tmp = hsync_pos / 8; /* HSYNP */
435         tmp |= (display_var->hsync_len / 8) << 16; /* HSYNW */
436         lcdc_write_chan(ch, LDHSYNR, tmp);
437
438         /* vertical configuration */
439         tmp = display_var->yres + display_var->vsync_len +
440                 display_var->upper_margin + display_var->lower_margin; /* VTLN */
441         tmp |= min(display_var->yres, var->yres) << 16; /* VDLN */
442         lcdc_write_chan(ch, LDVLNR, tmp);
443
444         tmp = display_var->yres + display_var->lower_margin; /* VSYNP */
445         tmp |= display_var->vsync_len << 16; /* VSYNW */
446         lcdc_write_chan(ch, LDVSYNR, tmp);
447
448         /* Adjust horizontal synchronisation for HDMI */
449         display_h_total = display_var->xres + display_var->hsync_len +
450                 display_var->left_margin + display_var->right_margin;
451         tmp = ((display_var->xres & 7) << 24) |
452                 ((display_h_total & 7) << 16) |
453                 ((display_var->hsync_len & 7) << 8) |
454                 hsync_pos;
455         lcdc_write_chan(ch, LDHAJR, tmp);
456 }
457
458 static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
459 {
460         struct sh_mobile_lcdc_chan *ch;
461         struct sh_mobile_lcdc_board_cfg *board_cfg;
462         unsigned long tmp;
463         int k, m;
464         int ret = 0;
465
466         /* enable clocks before accessing the hardware */
467         for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
468                 if (priv->ch[k].enabled)
469                         sh_mobile_lcdc_clk_on(priv);
470
471         /* reset */
472         lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LCDC_RESET);
473         lcdc_wait_bit(priv, _LDCNT2R, LCDC_RESET, 0);
474
475         /* enable LCDC channels */
476         tmp = lcdc_read(priv, _LDCNT2R);
477         tmp |= priv->ch[0].enabled;
478         tmp |= priv->ch[1].enabled;
479         lcdc_write(priv, _LDCNT2R, tmp);
480
481         /* read data from external memory, avoid using the BEU for now */
482         lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) & ~DISPLAY_BEU);
483
484         /* stop the lcdc first */
485         sh_mobile_lcdc_start_stop(priv, 0);
486
487         /* configure clocks */
488         tmp = priv->lddckr;
489         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
490                 ch = &priv->ch[k];
491
492                 if (!priv->ch[k].enabled)
493                         continue;
494
495                 m = ch->cfg.clock_divider;
496                 if (!m)
497                         continue;
498
499                 if (m == 1)
500                         m = 1 << 6;
501                 tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
502
503                 /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider denominator */
504                 lcdc_write_chan(ch, LDDCKPAT1R, 0);
505                 lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1);
506         }
507
508         lcdc_write(priv, _LDDCKR, tmp);
509
510         /* start dotclock again */
511         lcdc_write(priv, _LDDCKSTPR, 0);
512         lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0);
513
514         /* interrupts are disabled to begin with */
515         lcdc_write(priv, _LDINTR, 0);
516
517         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
518                 ch = &priv->ch[k];
519
520                 if (!ch->enabled)
521                         continue;
522
523                 sh_mobile_lcdc_geometry(ch);
524
525                 /* power supply */
526                 lcdc_write_chan(ch, LDPMR, 0);
527
528                 board_cfg = &ch->cfg.board_cfg;
529                 if (board_cfg->setup_sys)
530                         ret = board_cfg->setup_sys(board_cfg->board_data, ch,
531                                                    &sh_mobile_lcdc_sys_bus_ops);
532                 if (ret)
533                         return ret;
534         }
535
536         /* word and long word swap */
537         lcdc_write(priv, _LDDDSR, lcdc_read(priv, _LDDDSR) | 6);
538
539         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
540                 ch = &priv->ch[k];
541
542                 if (!priv->ch[k].enabled)
543                         continue;
544
545                 /* set bpp format in PKF[4:0] */
546                 tmp = lcdc_read_chan(ch, LDDFR);
547                 tmp &= ~0x0001001f;
548                 tmp |= (ch->info->var.bits_per_pixel == 16) ? 3 : 0;
549                 lcdc_write_chan(ch, LDDFR, tmp);
550
551                 /* point out our frame buffer */
552                 lcdc_write_chan(ch, LDSA1R, ch->info->fix.smem_start);
553
554                 /* set line size */
555                 lcdc_write_chan(ch, LDMLSR, ch->info->fix.line_length);
556
557                 /* setup deferred io if SYS bus */
558                 tmp = ch->cfg.sys_bus_cfg.deferred_io_msec;
559                 if (ch->ldmt1r_value & (1 << 12) && tmp) {
560                         ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
561                         ch->defio.delay = msecs_to_jiffies(tmp);
562                         ch->info->fbdefio = &ch->defio;
563                         fb_deferred_io_init(ch->info);
564
565                         /* one-shot mode */
566                         lcdc_write_chan(ch, LDSM1R, 1);
567
568                         /* enable "Frame End Interrupt Enable" bit */
569                         lcdc_write(priv, _LDINTR, LDINTR_FE);
570
571                 } else {
572                         /* continuous read mode */
573                         lcdc_write_chan(ch, LDSM1R, 0);
574                 }
575         }
576
577         /* display output */
578         lcdc_write(priv, _LDCNT1R, LCDC_ENABLE);
579
580         /* start the lcdc */
581         sh_mobile_lcdc_start_stop(priv, 1);
582         priv->started = 1;
583
584         /* tell the board code to enable the panel */
585         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
586                 ch = &priv->ch[k];
587                 if (!ch->enabled)
588                         continue;
589
590                 board_cfg = &ch->cfg.board_cfg;
591                 if (try_module_get(board_cfg->owner) && board_cfg->display_on) {
592                         board_cfg->display_on(board_cfg->board_data, ch->info);
593                         module_put(board_cfg->owner);
594                 }
595         }
596
597         return 0;
598 }
599
600 static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
601 {
602         struct sh_mobile_lcdc_chan *ch;
603         struct sh_mobile_lcdc_board_cfg *board_cfg;
604         int k;
605
606         /* clean up deferred io and ask board code to disable panel */
607         for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
608                 ch = &priv->ch[k];
609                 if (!ch->enabled)
610                         continue;
611
612                 /* deferred io mode:
613                  * flush frame, and wait for frame end interrupt
614                  * clean up deferred io and enable clock
615                  */
616                 if (ch->info && ch->info->fbdefio) {
617                         ch->frame_end = 0;
618                         schedule_delayed_work(&ch->info->deferred_work, 0);
619                         wait_event(ch->frame_end_wait, ch->frame_end);
620                         fb_deferred_io_cleanup(ch->info);
621                         ch->info->fbdefio = NULL;
622                         sh_mobile_lcdc_clk_on(priv);
623                 }
624
625                 board_cfg = &ch->cfg.board_cfg;
626                 if (try_module_get(board_cfg->owner) && board_cfg->display_off) {
627                         board_cfg->display_off(board_cfg->board_data);
628                         module_put(board_cfg->owner);
629                 }
630         }
631
632         /* stop the lcdc */
633         if (priv->started) {
634                 sh_mobile_lcdc_start_stop(priv, 0);
635                 priv->started = 0;
636         }
637
638         /* stop clocks */
639         for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
640                 if (priv->ch[k].enabled)
641                         sh_mobile_lcdc_clk_off(priv);
642 }
643
644 static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
645 {
646         int ifm, miftyp;
647
648         switch (ch->cfg.interface_type) {
649         case RGB8: ifm = 0; miftyp = 0; break;
650         case RGB9: ifm = 0; miftyp = 4; break;
651         case RGB12A: ifm = 0; miftyp = 5; break;
652         case RGB12B: ifm = 0; miftyp = 6; break;
653         case RGB16: ifm = 0; miftyp = 7; break;
654         case RGB18: ifm = 0; miftyp = 10; break;
655         case RGB24: ifm = 0; miftyp = 11; break;
656         case SYS8A: ifm = 1; miftyp = 0; break;
657         case SYS8B: ifm = 1; miftyp = 1; break;
658         case SYS8C: ifm = 1; miftyp = 2; break;
659         case SYS8D: ifm = 1; miftyp = 3; break;
660         case SYS9: ifm = 1; miftyp = 4; break;
661         case SYS12: ifm = 1; miftyp = 5; break;
662         case SYS16A: ifm = 1; miftyp = 7; break;
663         case SYS16B: ifm = 1; miftyp = 8; break;
664         case SYS16C: ifm = 1; miftyp = 9; break;
665         case SYS18: ifm = 1; miftyp = 10; break;
666         case SYS24: ifm = 1; miftyp = 11; break;
667         default: goto bad;
668         }
669
670         /* SUBLCD only supports SYS interface */
671         if (lcdc_chan_is_sublcd(ch)) {
672                 if (ifm == 0)
673                         goto bad;
674                 else
675                         ifm = 0;
676         }
677
678         ch->ldmt1r_value = (ifm << 12) | miftyp;
679         return 0;
680  bad:
681         return -EINVAL;
682 }
683
684 static int sh_mobile_lcdc_setup_clocks(struct platform_device *pdev,
685                                        int clock_source,
686                                        struct sh_mobile_lcdc_priv *priv)
687 {
688         char *str;
689         int icksel;
690
691         switch (clock_source) {
692         case LCDC_CLK_BUS: str = "bus_clk"; icksel = 0; break;
693         case LCDC_CLK_PERIPHERAL: str = "peripheral_clk"; icksel = 1; break;
694         case LCDC_CLK_EXTERNAL: str = NULL; icksel = 2; break;
695         default:
696                 return -EINVAL;
697         }
698
699         priv->lddckr = icksel << 16;
700
701         if (str) {
702                 priv->dot_clk = clk_get(&pdev->dev, str);
703                 if (IS_ERR(priv->dot_clk)) {
704                         dev_err(&pdev->dev, "cannot get dot clock %s\n", str);
705                         return PTR_ERR(priv->dot_clk);
706                 }
707         }
708
709         /* Runtime PM support involves two step for this driver:
710          * 1) Enable Runtime PM
711          * 2) Force Runtime PM Resume since hardware is accessed from probe()
712          */
713         priv->dev = &pdev->dev;
714         pm_runtime_enable(priv->dev);
715         pm_runtime_resume(priv->dev);
716         return 0;
717 }
718
719 static int sh_mobile_lcdc_setcolreg(u_int regno,
720                                     u_int red, u_int green, u_int blue,
721                                     u_int transp, struct fb_info *info)
722 {
723         u32 *palette = info->pseudo_palette;
724
725         if (regno >= PALETTE_NR)
726                 return -EINVAL;
727
728         /* only FB_VISUAL_TRUECOLOR supported */
729
730         red >>= 16 - info->var.red.length;
731         green >>= 16 - info->var.green.length;
732         blue >>= 16 - info->var.blue.length;
733         transp >>= 16 - info->var.transp.length;
734
735         palette[regno] = (red << info->var.red.offset) |
736           (green << info->var.green.offset) |
737           (blue << info->var.blue.offset) |
738           (transp << info->var.transp.offset);
739
740         return 0;
741 }
742
743 static struct fb_fix_screeninfo sh_mobile_lcdc_fix  = {
744         .id =           "SH Mobile LCDC",
745         .type =         FB_TYPE_PACKED_PIXELS,
746         .visual =       FB_VISUAL_TRUECOLOR,
747         .accel =        FB_ACCEL_NONE,
748         .xpanstep =     0,
749         .ypanstep =     1,
750         .ywrapstep =    0,
751 };
752
753 static void sh_mobile_lcdc_fillrect(struct fb_info *info,
754                                     const struct fb_fillrect *rect)
755 {
756         sys_fillrect(info, rect);
757         sh_mobile_lcdc_deferred_io_touch(info);
758 }
759
760 static void sh_mobile_lcdc_copyarea(struct fb_info *info,
761                                     const struct fb_copyarea *area)
762 {
763         sys_copyarea(info, area);
764         sh_mobile_lcdc_deferred_io_touch(info);
765 }
766
767 static void sh_mobile_lcdc_imageblit(struct fb_info *info,
768                                      const struct fb_image *image)
769 {
770         sys_imageblit(info, image);
771         sh_mobile_lcdc_deferred_io_touch(info);
772 }
773
774 static int sh_mobile_fb_pan_display(struct fb_var_screeninfo *var,
775                                      struct fb_info *info)
776 {
777         struct sh_mobile_lcdc_chan *ch = info->par;
778         struct sh_mobile_lcdc_priv *priv = ch->lcdc;
779         unsigned long ldrcntr;
780         unsigned long new_pan_offset;
781
782         new_pan_offset = (var->yoffset * info->fix.line_length) +
783                 (var->xoffset * (info->var.bits_per_pixel / 8));
784
785         if (new_pan_offset == ch->pan_offset)
786                 return 0;       /* No change, do nothing */
787
788         ldrcntr = lcdc_read(priv, _LDRCNTR);
789
790         /* Set the source address for the next refresh */
791         lcdc_write_chan_mirror(ch, LDSA1R, ch->dma_handle + new_pan_offset);
792         if (lcdc_chan_is_sublcd(ch))
793                 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
794         else
795                 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS);
796
797         ch->pan_offset = new_pan_offset;
798
799         sh_mobile_lcdc_deferred_io_touch(info);
800
801         return 0;
802 }
803
804 static int sh_mobile_wait_for_vsync(struct fb_info *info)
805 {
806         struct sh_mobile_lcdc_chan *ch = info->par;
807         unsigned long ldintr;
808         int ret;
809
810         /* Enable VSync End interrupt */
811         ldintr = lcdc_read(ch->lcdc, _LDINTR);
812         ldintr |= LDINTR_VEE;
813         lcdc_write(ch->lcdc, _LDINTR, ldintr);
814
815         ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion,
816                                                         msecs_to_jiffies(100));
817         if (!ret)
818                 return -ETIMEDOUT;
819
820         return 0;
821 }
822
823 static int sh_mobile_ioctl(struct fb_info *info, unsigned int cmd,
824                        unsigned long arg)
825 {
826         int retval;
827
828         switch (cmd) {
829         case FBIO_WAITFORVSYNC:
830                 retval = sh_mobile_wait_for_vsync(info);
831                 break;
832
833         default:
834                 retval = -ENOIOCTLCMD;
835                 break;
836         }
837         return retval;
838 }
839
840 static void sh_mobile_fb_reconfig(struct fb_info *info)
841 {
842         struct sh_mobile_lcdc_chan *ch = info->par;
843         struct fb_videomode mode1, mode2;
844         struct fb_event event;
845         int evnt = FB_EVENT_MODE_CHANGE_ALL;
846
847         if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par))
848                 /* More framebuffer users are active */
849                 return;
850
851         fb_var_to_videomode(&mode1, &ch->display_var);
852         fb_var_to_videomode(&mode2, &info->var);
853
854         if (fb_mode_is_equal(&mode1, &mode2))
855                 return;
856
857         /* Display has been re-plugged, framebuffer is free now, reconfigure */
858         if (fb_set_var(info, &ch->display_var) < 0)
859                 /* Couldn't reconfigure, hopefully, can continue as before */
860                 return;
861
862         info->fix.line_length = mode2.xres * (ch->cfg.bpp / 8);
863
864         /*
865          * fb_set_var() calls the notifier change internally, only if
866          * FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a
867          * user event, we have to call the chain ourselves.
868          */
869         event.info = info;
870         event.data = &mode2;
871         fb_notifier_call_chain(evnt, &event);
872 }
873
874 /*
875  * Locking: both .fb_release() and .fb_open() are called with info->lock held if
876  * user == 1, or with console sem held, if user == 0.
877  */
878 static int sh_mobile_release(struct fb_info *info, int user)
879 {
880         struct sh_mobile_lcdc_chan *ch = info->par;
881
882         mutex_lock(&ch->open_lock);
883         dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
884
885         ch->use_count--;
886
887         /* Nothing to reconfigure, when called from fbcon */
888         if (user) {
889                 acquire_console_sem();
890                 sh_mobile_fb_reconfig(info);
891                 release_console_sem();
892         }
893
894         mutex_unlock(&ch->open_lock);
895
896         return 0;
897 }
898
899 static int sh_mobile_open(struct fb_info *info, int user)
900 {
901         struct sh_mobile_lcdc_chan *ch = info->par;
902
903         mutex_lock(&ch->open_lock);
904         ch->use_count++;
905
906         dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
907         mutex_unlock(&ch->open_lock);
908
909         return 0;
910 }
911
912 static int sh_mobile_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
913 {
914         struct sh_mobile_lcdc_chan *ch = info->par;
915
916         if (var->xres < 160 || var->xres > 1920 ||
917             var->yres < 120 || var->yres > 1080 ||
918             var->left_margin < 32 || var->left_margin > 320 ||
919             var->right_margin < 12 || var->right_margin > 240 ||
920             var->upper_margin < 12 || var->upper_margin > 120 ||
921             var->lower_margin < 1 || var->lower_margin > 64 ||
922             var->hsync_len < 32 || var->hsync_len > 240 ||
923             var->vsync_len < 2 || var->vsync_len > 64 ||
924             var->pixclock < 6000 || var->pixclock > 40000 ||
925             var->xres * var->yres * (ch->cfg.bpp / 8) * 2 > info->fix.smem_len) {
926                 dev_warn(info->dev, "Invalid info: %u %u %u %u %u %u %u %u %u!\n",
927                          var->xres, var->yres,
928                          var->left_margin, var->right_margin,
929                          var->upper_margin, var->lower_margin,
930                          var->hsync_len, var->vsync_len,
931                          var->pixclock);
932                 return -EINVAL;
933         }
934         return 0;
935 }
936
937 static struct fb_ops sh_mobile_lcdc_ops = {
938         .owner          = THIS_MODULE,
939         .fb_setcolreg   = sh_mobile_lcdc_setcolreg,
940         .fb_read        = fb_sys_read,
941         .fb_write       = fb_sys_write,
942         .fb_fillrect    = sh_mobile_lcdc_fillrect,
943         .fb_copyarea    = sh_mobile_lcdc_copyarea,
944         .fb_imageblit   = sh_mobile_lcdc_imageblit,
945         .fb_pan_display = sh_mobile_fb_pan_display,
946         .fb_ioctl       = sh_mobile_ioctl,
947         .fb_open        = sh_mobile_open,
948         .fb_release     = sh_mobile_release,
949         .fb_check_var   = sh_mobile_check_var,
950 };
951
952 static int sh_mobile_lcdc_set_bpp(struct fb_var_screeninfo *var, int bpp)
953 {
954         switch (bpp) {
955         case 16: /* PKF[4:0] = 00011 - RGB 565 */
956                 var->red.offset = 11;
957                 var->red.length = 5;
958                 var->green.offset = 5;
959                 var->green.length = 6;
960                 var->blue.offset = 0;
961                 var->blue.length = 5;
962                 var->transp.offset = 0;
963                 var->transp.length = 0;
964                 break;
965
966         case 32: /* PKF[4:0] = 00000 - RGB 888
967                   * sh7722 pdf says 00RRGGBB but reality is GGBB00RR
968                   * this may be because LDDDSR has word swap enabled..
969                   */
970                 var->red.offset = 0;
971                 var->red.length = 8;
972                 var->green.offset = 24;
973                 var->green.length = 8;
974                 var->blue.offset = 16;
975                 var->blue.length = 8;
976                 var->transp.offset = 0;
977                 var->transp.length = 0;
978                 break;
979         default:
980                 return -EINVAL;
981         }
982         var->bits_per_pixel = bpp;
983         var->red.msb_right = 0;
984         var->green.msb_right = 0;
985         var->blue.msb_right = 0;
986         var->transp.msb_right = 0;
987         return 0;
988 }
989
990 static int sh_mobile_lcdc_suspend(struct device *dev)
991 {
992         struct platform_device *pdev = to_platform_device(dev);
993
994         sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
995         return 0;
996 }
997
998 static int sh_mobile_lcdc_resume(struct device *dev)
999 {
1000         struct platform_device *pdev = to_platform_device(dev);
1001
1002         return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
1003 }
1004
1005 static int sh_mobile_lcdc_runtime_suspend(struct device *dev)
1006 {
1007         struct platform_device *pdev = to_platform_device(dev);
1008         struct sh_mobile_lcdc_priv *p = platform_get_drvdata(pdev);
1009         struct sh_mobile_lcdc_chan *ch;
1010         int k, n;
1011
1012         /* save per-channel registers */
1013         for (k = 0; k < ARRAY_SIZE(p->ch); k++) {
1014                 ch = &p->ch[k];
1015                 if (!ch->enabled)
1016                         continue;
1017                 for (n = 0; n < NR_CH_REGS; n++)
1018                         ch->saved_ch_regs[n] = lcdc_read_chan(ch, n);
1019         }
1020
1021         /* save shared registers */
1022         for (n = 0; n < NR_SHARED_REGS; n++)
1023                 p->saved_shared_regs[n] = lcdc_read(p, lcdc_shared_regs[n]);
1024
1025         /* turn off LCDC hardware */
1026         lcdc_write(p, _LDCNT1R, 0);
1027         return 0;
1028 }
1029
1030 static int sh_mobile_lcdc_runtime_resume(struct device *dev)
1031 {
1032         struct platform_device *pdev = to_platform_device(dev);
1033         struct sh_mobile_lcdc_priv *p = platform_get_drvdata(pdev);
1034         struct sh_mobile_lcdc_chan *ch;
1035         int k, n;
1036
1037         /* restore per-channel registers */
1038         for (k = 0; k < ARRAY_SIZE(p->ch); k++) {
1039                 ch = &p->ch[k];
1040                 if (!ch->enabled)
1041                         continue;
1042                 for (n = 0; n < NR_CH_REGS; n++)
1043                         lcdc_write_chan(ch, n, ch->saved_ch_regs[n]);
1044         }
1045
1046         /* restore shared registers */
1047         for (n = 0; n < NR_SHARED_REGS; n++)
1048                 lcdc_write(p, lcdc_shared_regs[n], p->saved_shared_regs[n]);
1049
1050         return 0;
1051 }
1052
1053 static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
1054         .suspend = sh_mobile_lcdc_suspend,
1055         .resume = sh_mobile_lcdc_resume,
1056         .runtime_suspend = sh_mobile_lcdc_runtime_suspend,
1057         .runtime_resume = sh_mobile_lcdc_runtime_resume,
1058 };
1059
1060 /* locking: called with info->lock held */
1061 static int sh_mobile_lcdc_notify(struct notifier_block *nb,
1062                                  unsigned long action, void *data)
1063 {
1064         struct fb_event *event = data;
1065         struct fb_info *info = event->info;
1066         struct sh_mobile_lcdc_chan *ch = info->par;
1067         struct sh_mobile_lcdc_board_cfg *board_cfg = &ch->cfg.board_cfg;
1068         int ret;
1069
1070         if (&ch->lcdc->notifier != nb)
1071                 return NOTIFY_DONE;
1072
1073         dev_dbg(info->dev, "%s(): action = %lu, data = %p\n",
1074                 __func__, action, event->data);
1075
1076         switch(action) {
1077         case FB_EVENT_SUSPEND:
1078                 if (try_module_get(board_cfg->owner) && board_cfg->display_off) {
1079                         board_cfg->display_off(board_cfg->board_data);
1080                         module_put(board_cfg->owner);
1081                 }
1082                 pm_runtime_put(info->device);
1083                 sh_mobile_lcdc_stop(ch->lcdc);
1084                 break;
1085         case FB_EVENT_RESUME:
1086                 mutex_lock(&ch->open_lock);
1087                 sh_mobile_fb_reconfig(info);
1088                 mutex_unlock(&ch->open_lock);
1089
1090                 /* HDMI must be enabled before LCDC configuration */
1091                 if (try_module_get(board_cfg->owner) && board_cfg->display_on) {
1092                         board_cfg->display_on(board_cfg->board_data, info);
1093                         module_put(board_cfg->owner);
1094                 }
1095
1096                 ret = sh_mobile_lcdc_start(ch->lcdc);
1097                 if (!ret)
1098                         pm_runtime_get_sync(info->device);
1099         }
1100
1101         return NOTIFY_OK;
1102 }
1103
1104 static int sh_mobile_lcdc_remove(struct platform_device *pdev);
1105
1106 static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev)
1107 {
1108         struct fb_info *info;
1109         struct sh_mobile_lcdc_priv *priv;
1110         struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data;
1111         struct resource *res;
1112         int error;
1113         void *buf;
1114         int i, j;
1115
1116         if (!pdata) {
1117                 dev_err(&pdev->dev, "no platform data defined\n");
1118                 return -EINVAL;
1119         }
1120
1121         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1122         i = platform_get_irq(pdev, 0);
1123         if (!res || i < 0) {
1124                 dev_err(&pdev->dev, "cannot get platform resources\n");
1125                 return -ENOENT;
1126         }
1127
1128         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
1129         if (!priv) {
1130                 dev_err(&pdev->dev, "cannot allocate device data\n");
1131                 return -ENOMEM;
1132         }
1133
1134         platform_set_drvdata(pdev, priv);
1135
1136         error = request_irq(i, sh_mobile_lcdc_irq, IRQF_DISABLED,
1137                             dev_name(&pdev->dev), priv);
1138         if (error) {
1139                 dev_err(&pdev->dev, "unable to request irq\n");
1140                 goto err1;
1141         }
1142
1143         priv->irq = i;
1144         atomic_set(&priv->hw_usecnt, -1);
1145
1146         j = 0;
1147         for (i = 0; i < ARRAY_SIZE(pdata->ch); i++) {
1148                 struct sh_mobile_lcdc_chan *ch = priv->ch + j;
1149
1150                 ch->lcdc = priv;
1151                 memcpy(&ch->cfg, &pdata->ch[i], sizeof(pdata->ch[i]));
1152
1153                 error = sh_mobile_lcdc_check_interface(ch);
1154                 if (error) {
1155                         dev_err(&pdev->dev, "unsupported interface type\n");
1156                         goto err1;
1157                 }
1158                 init_waitqueue_head(&ch->frame_end_wait);
1159                 init_completion(&ch->vsync_completion);
1160                 ch->pan_offset = 0;
1161
1162                 switch (pdata->ch[i].chan) {
1163                 case LCDC_CHAN_MAINLCD:
1164                         ch->enabled = 1 << 1;
1165                         ch->reg_offs = lcdc_offs_mainlcd;
1166                         j++;
1167                         break;
1168                 case LCDC_CHAN_SUBLCD:
1169                         ch->enabled = 1 << 2;
1170                         ch->reg_offs = lcdc_offs_sublcd;
1171                         j++;
1172                         break;
1173                 }
1174         }
1175
1176         if (!j) {
1177                 dev_err(&pdev->dev, "no channels defined\n");
1178                 error = -EINVAL;
1179                 goto err1;
1180         }
1181
1182         priv->base = ioremap_nocache(res->start, resource_size(res));
1183         if (!priv->base)
1184                 goto err1;
1185
1186         error = sh_mobile_lcdc_setup_clocks(pdev, pdata->clock_source, priv);
1187         if (error) {
1188                 dev_err(&pdev->dev, "unable to setup clocks\n");
1189                 goto err1;
1190         }
1191
1192         for (i = 0; i < j; i++) {
1193                 struct fb_var_screeninfo *var;
1194                 const struct fb_videomode *lcd_cfg, *max_cfg = NULL;
1195                 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
1196                 struct sh_mobile_lcdc_chan_cfg *cfg = &ch->cfg;
1197                 const struct fb_videomode *mode = cfg->lcd_cfg;
1198                 unsigned long max_size = 0;
1199                 int k;
1200
1201                 ch->info = framebuffer_alloc(0, &pdev->dev);
1202                 if (!ch->info) {
1203                         dev_err(&pdev->dev, "unable to allocate fb_info\n");
1204                         error = -ENOMEM;
1205                         break;
1206                 }
1207
1208                 info = ch->info;
1209                 var = &info->var;
1210                 info->fbops = &sh_mobile_lcdc_ops;
1211                 info->par = ch;
1212
1213                 mutex_init(&ch->open_lock);
1214
1215                 for (k = 0, lcd_cfg = mode;
1216                      k < cfg->num_cfg && lcd_cfg;
1217                      k++, lcd_cfg++) {
1218                         unsigned long size = lcd_cfg->yres * lcd_cfg->xres;
1219
1220                         if (size > max_size) {
1221                                 max_cfg = lcd_cfg;
1222                                 max_size = size;
1223                         }
1224                 }
1225
1226                 if (!mode)
1227                         max_size = DEFAULT_XRES * DEFAULT_YRES;
1228                 else if (max_cfg)
1229                         dev_dbg(&pdev->dev, "Found largest videomode %ux%u\n",
1230                                 max_cfg->xres, max_cfg->yres);
1231
1232                 info->fix = sh_mobile_lcdc_fix;
1233                 info->fix.smem_len = max_size * (cfg->bpp / 8) * 2;
1234
1235                 if (!mode)
1236                         mode = &default_720p;
1237
1238                 fb_videomode_to_var(var, mode);
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                 const struct fb_videomode *mode = ch->cfg.lcd_cfg;
1285
1286                 if (!mode)
1287                         mode = &default_720p;
1288
1289                 info = ch->info;
1290
1291                 if (info->fbdefio) {
1292                         ch->sglist = vmalloc(sizeof(struct scatterlist) *
1293                                         info->fix.smem_len >> PAGE_SHIFT);
1294                         if (!ch->sglist) {
1295                                 dev_err(&pdev->dev, "cannot allocate sglist\n");
1296                                 goto err1;
1297                         }
1298                 }
1299
1300                 fb_videomode_to_modelist(mode, ch->cfg.num_cfg, &info->modelist);
1301                 error = register_framebuffer(info);
1302                 if (error < 0)
1303                         goto err1;
1304
1305                 dev_info(info->dev,
1306                          "registered %s/%s as %dx%d %dbpp.\n",
1307                          pdev->name,
1308                          (ch->cfg.chan == LCDC_CHAN_MAINLCD) ?
1309                          "mainlcd" : "sublcd",
1310                          info->var.xres, info->var.yres,
1311                          ch->cfg.bpp);
1312
1313                 /* deferred io mode: disable clock to save power */
1314                 if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED)
1315                         sh_mobile_lcdc_clk_off(priv);
1316         }
1317
1318         /* Failure ignored */
1319         priv->notifier.notifier_call = sh_mobile_lcdc_notify;
1320         fb_register_client(&priv->notifier);
1321
1322         return 0;
1323 err1:
1324         sh_mobile_lcdc_remove(pdev);
1325
1326         return error;
1327 }
1328
1329 static int sh_mobile_lcdc_remove(struct platform_device *pdev)
1330 {
1331         struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
1332         struct fb_info *info;
1333         int i;
1334
1335         fb_unregister_client(&priv->notifier);
1336
1337         for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
1338                 if (priv->ch[i].info && priv->ch[i].info->dev)
1339                         unregister_framebuffer(priv->ch[i].info);
1340
1341         sh_mobile_lcdc_stop(priv);
1342
1343         for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
1344                 info = priv->ch[i].info;
1345
1346                 if (!info || !info->device)
1347                         continue;
1348
1349                 if (priv->ch[i].sglist)
1350                         vfree(priv->ch[i].sglist);
1351
1352                 if (info->screen_base)
1353                         dma_free_coherent(&pdev->dev, info->fix.smem_len,
1354                                           info->screen_base,
1355                                           priv->ch[i].dma_handle);
1356                 fb_dealloc_cmap(&info->cmap);
1357                 framebuffer_release(info);
1358         }
1359
1360         if (priv->dot_clk)
1361                 clk_put(priv->dot_clk);
1362
1363         if (priv->dev)
1364                 pm_runtime_disable(priv->dev);
1365
1366         if (priv->base)
1367                 iounmap(priv->base);
1368
1369         if (priv->irq)
1370                 free_irq(priv->irq, priv);
1371         kfree(priv);
1372         return 0;
1373 }
1374
1375 static struct platform_driver sh_mobile_lcdc_driver = {
1376         .driver         = {
1377                 .name           = "sh_mobile_lcdc_fb",
1378                 .owner          = THIS_MODULE,
1379                 .pm             = &sh_mobile_lcdc_dev_pm_ops,
1380         },
1381         .probe          = sh_mobile_lcdc_probe,
1382         .remove         = sh_mobile_lcdc_remove,
1383 };
1384
1385 static int __init sh_mobile_lcdc_init(void)
1386 {
1387         return platform_driver_register(&sh_mobile_lcdc_driver);
1388 }
1389
1390 static void __exit sh_mobile_lcdc_exit(void)
1391 {
1392         platform_driver_unregister(&sh_mobile_lcdc_driver);
1393 }
1394
1395 module_init(sh_mobile_lcdc_init);
1396 module_exit(sh_mobile_lcdc_exit);
1397
1398 MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
1399 MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
1400 MODULE_LICENSE("GPL v2");