?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
thp: transparent hugepage vmstat
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / video / sh_mobile_lcdcfb.c
blobbd4840a8a6b772f84c13f4356705e92302e21a39
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 int forced_bpp; /* 2 channel LCDC must share bpp setting */
143 };
144
145 static bool banked(int reg_nr)
146 {
147 switch (reg_nr) {
148 case LDMT1R:
149 case LDMT2R:
150 case LDMT3R:
151 case LDDFR:
152 case LDSM1R:
153 case LDSA1R:
154 case LDMLSR:
155 case LDHCNR:
156 case LDHSYNR:
157 case LDVLNR:
158 case LDVSYNR:
159 return true;
160 }
161 return false;
162 }
163
164 static void lcdc_write_chan(struct sh_mobile_lcdc_chan *chan,
165 int reg_nr, unsigned long data)
166 {
167 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr]);
168 if (banked(reg_nr))
169 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
170 SIDE_B_OFFSET);
171 }
172
173 static void lcdc_write_chan_mirror(struct sh_mobile_lcdc_chan *chan,
174 int reg_nr, unsigned long data)
175 {
176 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
177 MIRROR_OFFSET);
178 }
179
180 static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan *chan,
181 int reg_nr)
182 {
183 return ioread32(chan->lcdc->base + chan->reg_offs[reg_nr]);
184 }
185
186 static void lcdc_write(struct sh_mobile_lcdc_priv *priv,
187 unsigned long reg_offs, unsigned long data)
188 {
189 iowrite32(data, priv->base + reg_offs);
190 }
191
192 static unsigned long lcdc_read(struct sh_mobile_lcdc_priv *priv,
193 unsigned long reg_offs)
194 {
195 return ioread32(priv->base + reg_offs);
196 }
197
198 static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv,
199 unsigned long reg_offs,
200 unsigned long mask, unsigned long until)
201 {
202 while ((lcdc_read(priv, reg_offs) & mask) != until)
203 cpu_relax();
204 }
205
206 static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan)
207 {
208 return chan->cfg.chan == LCDC_CHAN_SUBLCD;
209 }
210
211 static void lcdc_sys_write_index(void *handle, unsigned long data)
212 {
213 struct sh_mobile_lcdc_chan *ch = handle;
214
215 lcdc_write(ch->lcdc, _LDDWD0R, data | 0x10000000);
216 lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
217 lcdc_write(ch->lcdc, _LDDWAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
218 lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
219 }
220
221 static void lcdc_sys_write_data(void *handle, unsigned long data)
222 {
223 struct sh_mobile_lcdc_chan *ch = handle;
224
225 lcdc_write(ch->lcdc, _LDDWD0R, data | 0x11000000);
226 lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
227 lcdc_write(ch->lcdc, _LDDWAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
228 lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
229 }
230
231 static unsigned long lcdc_sys_read_data(void *handle)
232 {
233 struct sh_mobile_lcdc_chan *ch = handle;
234
235 lcdc_write(ch->lcdc, _LDDRDR, 0x01000000);
236 lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
237 lcdc_write(ch->lcdc, _LDDRAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
238 udelay(1);
239 lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
240
241 return lcdc_read(ch->lcdc, _LDDRDR) & 0x3ffff;
242 }
243
244 struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = {
245 lcdc_sys_write_index,
246 lcdc_sys_write_data,
247 lcdc_sys_read_data,
248 };
249
250 static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv)
251 {
252 if (atomic_inc_and_test(&priv->hw_usecnt)) {
253 pm_runtime_get_sync(priv->dev);
254 if (priv->dot_clk)
255 clk_enable(priv->dot_clk);
256 }
257 }
258
259 static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv)
260 {
261 if (atomic_sub_return(1, &priv->hw_usecnt) == -1) {
262 if (priv->dot_clk)
263 clk_disable(priv->dot_clk);
264 pm_runtime_put(priv->dev);
265 }
266 }
267
268 static int sh_mobile_lcdc_sginit(struct fb_info *info,
269 struct list_head *pagelist)
270 {
271 struct sh_mobile_lcdc_chan *ch = info->par;
272 unsigned int nr_pages_max = info->fix.smem_len >> PAGE_SHIFT;
273 struct page *page;
274 int nr_pages = 0;
275
276 sg_init_table(ch->sglist, nr_pages_max);
277
278 list_for_each_entry(page, pagelist, lru)
279 sg_set_page(&ch->sglist[nr_pages++], page, PAGE_SIZE, 0);
280
281 return nr_pages;
282 }
283
284 static void sh_mobile_lcdc_deferred_io(struct fb_info *info,
285 struct list_head *pagelist)
286 {
287 struct sh_mobile_lcdc_chan *ch = info->par;
288 struct sh_mobile_lcdc_board_cfg *bcfg = &ch->cfg.board_cfg;
289
290 /* enable clocks before accessing hardware */
291 sh_mobile_lcdc_clk_on(ch->lcdc);
292
293 /*
294 * It's possible to get here without anything on the pagelist via
295 * sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync()
296 * invocation. In the former case, the acceleration routines are
297 * stepped in to when using the framebuffer console causing the
298 * workqueue to be scheduled without any dirty pages on the list.
299 *
300 * Despite this, a panel update is still needed given that the
301 * acceleration routines have their own methods for writing in
302 * that still need to be updated.
303 *
304 * The fsync() and empty pagelist case could be optimized for,
305 * but we don't bother, as any application exhibiting such
306 * behaviour is fundamentally broken anyways.
307 */
308 if (!list_empty(pagelist)) {
309 unsigned int nr_pages = sh_mobile_lcdc_sginit(info, pagelist);
310
311 /* trigger panel update */
312 dma_map_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
313 if (bcfg->start_transfer)
314 bcfg->start_transfer(bcfg->board_data, ch,
315 &sh_mobile_lcdc_sys_bus_ops);
316 lcdc_write_chan(ch, LDSM2R, 1);
317 dma_unmap_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
318 } else {
319 if (bcfg->start_transfer)
320 bcfg->start_transfer(bcfg->board_data, ch,
321 &sh_mobile_lcdc_sys_bus_ops);
322 lcdc_write_chan(ch, LDSM2R, 1);
323 }
324 }
325
326 static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info)
327 {
328 struct fb_deferred_io *fbdefio = info->fbdefio;
329
330 if (fbdefio)
331 schedule_delayed_work(&info->deferred_work, fbdefio->delay);
332 }
333
334 static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
335 {
336 struct sh_mobile_lcdc_priv *priv = data;
337 struct sh_mobile_lcdc_chan *ch;
338 unsigned long tmp;
339 unsigned long ldintr;
340 int is_sub;
341 int k;
342
343 /* acknowledge interrupt */
344 ldintr = tmp = lcdc_read(priv, _LDINTR);
345 /*
346 * disable further VSYNC End IRQs, preserve all other enabled IRQs,
347 * write 0 to bits 0-6 to ack all triggered IRQs.
348 */
349 tmp &= 0xffffff00 & ~LDINTR_VEE;
350 lcdc_write(priv, _LDINTR, tmp);
351
352 /* figure out if this interrupt is for main or sub lcd */
353 is_sub = (lcdc_read(priv, _LDSR) & (1 << 10)) ? 1 : 0;
354
355 /* wake up channel and disable clocks */
356 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
357 ch = &priv->ch[k];
358
359 if (!ch->enabled)
360 continue;
361
362 /* Frame Start */
363 if (ldintr & LDINTR_FS) {
364 if (is_sub == lcdc_chan_is_sublcd(ch)) {
365 ch->frame_end = 1;
366 wake_up(&ch->frame_end_wait);
367
368 sh_mobile_lcdc_clk_off(priv);
369 }
370 }
371
372 /* VSYNC End */
373 if (ldintr & LDINTR_VES)
374 complete(&ch->vsync_completion);
375 }
376
377 return IRQ_HANDLED;
378 }
379
380 static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv,
381 int start)
382 {
383 unsigned long tmp = lcdc_read(priv, _LDCNT2R);
384 int k;
385
386 /* start or stop the lcdc */
387 if (start)
388 lcdc_write(priv, _LDCNT2R, tmp | START_LCDC);
389 else
390 lcdc_write(priv, _LDCNT2R, tmp & ~START_LCDC);
391
392 /* wait until power is applied/stopped on all channels */
393 for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
394 if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled)
395 while (1) {
396 tmp = lcdc_read_chan(&priv->ch[k], LDPMR) & 3;
397 if (start && tmp == 3)
398 break;
399 if (!start && tmp == 0)
400 break;
401 cpu_relax();
402 }
403
404 if (!start)
405 lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */
406 }
407
408 static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch)
409 {
410 struct fb_var_screeninfo *var = &ch->info->var, *display_var = &ch->display_var;
411 unsigned long h_total, hsync_pos, display_h_total;
412 u32 tmp;
413
414 tmp = ch->ldmt1r_value;
415 tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : 1 << 28;
416 tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : 1 << 27;
417 tmp |= (ch->cfg.flags & LCDC_FLAGS_DWPOL) ? 1 << 26 : 0;
418 tmp |= (ch->cfg.flags & LCDC_FLAGS_DIPOL) ? 1 << 25 : 0;
419 tmp |= (ch->cfg.flags & LCDC_FLAGS_DAPOL) ? 1 << 24 : 0;
420 tmp |= (ch->cfg.flags & LCDC_FLAGS_HSCNT) ? 1 << 17 : 0;
421 tmp |= (ch->cfg.flags & LCDC_FLAGS_DWCNT) ? 1 << 16 : 0;
422 lcdc_write_chan(ch, LDMT1R, tmp);
423
424 /* setup SYS bus */
425 lcdc_write_chan(ch, LDMT2R, ch->cfg.sys_bus_cfg.ldmt2r);
426 lcdc_write_chan(ch, LDMT3R, ch->cfg.sys_bus_cfg.ldmt3r);
427
428 /* horizontal configuration */
429 h_total = display_var->xres + display_var->hsync_len +
430 display_var->left_margin + display_var->right_margin;
431 tmp = h_total / 8; /* HTCN */
432 tmp |= (min(display_var->xres, var->xres) / 8) << 16; /* HDCN */
433 lcdc_write_chan(ch, LDHCNR, tmp);
434
435 hsync_pos = display_var->xres + display_var->right_margin;
436 tmp = hsync_pos / 8; /* HSYNP */
437 tmp |= (display_var->hsync_len / 8) << 16; /* HSYNW */
438 lcdc_write_chan(ch, LDHSYNR, tmp);
439
440 /* vertical configuration */
441 tmp = display_var->yres + display_var->vsync_len +
442 display_var->upper_margin + display_var->lower_margin; /* VTLN */
443 tmp |= min(display_var->yres, var->yres) << 16; /* VDLN */
444 lcdc_write_chan(ch, LDVLNR, tmp);
445
446 tmp = display_var->yres + display_var->lower_margin; /* VSYNP */
447 tmp |= display_var->vsync_len << 16; /* VSYNW */
448 lcdc_write_chan(ch, LDVSYNR, tmp);
449
450 /* Adjust horizontal synchronisation for HDMI */
451 display_h_total = display_var->xres + display_var->hsync_len +
452 display_var->left_margin + display_var->right_margin;
453 tmp = ((display_var->xres & 7) << 24) |
454 ((display_h_total & 7) << 16) |
455 ((display_var->hsync_len & 7) << 8) |
456 hsync_pos;
457 lcdc_write_chan(ch, LDHAJR, tmp);
458 }
459
460 static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
461 {
462 struct sh_mobile_lcdc_chan *ch;
463 struct sh_mobile_lcdc_board_cfg *board_cfg;
464 unsigned long tmp;
465 int bpp = 0;
466 int k, m;
467 int ret = 0;
468
469 /* enable clocks before accessing the hardware */
470 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
471 if (priv->ch[k].enabled) {
472 sh_mobile_lcdc_clk_on(priv);
473 if (!bpp)
474 bpp = priv->ch[k].info->var.bits_per_pixel;
475 }
476 }
477
478 /* reset */
479 lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LCDC_RESET);
480 lcdc_wait_bit(priv, _LDCNT2R, LCDC_RESET, 0);
481
482 /* enable LCDC channels */
483 tmp = lcdc_read(priv, _LDCNT2R);
484 tmp |= priv->ch[0].enabled;
485 tmp |= priv->ch[1].enabled;
486 lcdc_write(priv, _LDCNT2R, tmp);
487
488 /* read data from external memory, avoid using the BEU for now */
489 lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) & ~DISPLAY_BEU);
490
491 /* stop the lcdc first */
492 sh_mobile_lcdc_start_stop(priv, 0);
493
494 /* configure clocks */
495 tmp = priv->lddckr;
496 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
497 ch = &priv->ch[k];
498
499 if (!priv->ch[k].enabled)
500 continue;
501
502 m = ch->cfg.clock_divider;
503 if (!m)
504 continue;
505
506 if (m == 1)
507 m = 1 << 6;
508 tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
509
510 /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider denominator */
511 lcdc_write_chan(ch, LDDCKPAT1R, 0);
512 lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1);
513 }
514
515 lcdc_write(priv, _LDDCKR, tmp);
516
517 /* start dotclock again */
518 lcdc_write(priv, _LDDCKSTPR, 0);
519 lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0);
520
521 /* interrupts are disabled to begin with */
522 lcdc_write(priv, _LDINTR, 0);
523
524 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
525 ch = &priv->ch[k];
526
527 if (!ch->enabled)
528 continue;
529
530 sh_mobile_lcdc_geometry(ch);
531
532 /* power supply */
533 lcdc_write_chan(ch, LDPMR, 0);
534
535 board_cfg = &ch->cfg.board_cfg;
536 if (board_cfg->setup_sys)
537 ret = board_cfg->setup_sys(board_cfg->board_data, ch,
538 &sh_mobile_lcdc_sys_bus_ops);
539 if (ret)
540 return ret;
541 }
542
543 /* word and long word swap */
544 switch (bpp) {
545 case 16:
546 lcdc_write(priv, _LDDDSR, lcdc_read(priv, _LDDDSR) | 6);
547 break;
548 case 24:
549 lcdc_write(priv, _LDDDSR, lcdc_read(priv, _LDDDSR) | 7);
550 break;
551 case 32:
552 lcdc_write(priv, _LDDDSR, lcdc_read(priv, _LDDDSR) | 4);
553 break;
554 }
555
556 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
557 ch = &priv->ch[k];
558
559 if (!priv->ch[k].enabled)
560 continue;
561
562 /* set bpp format in PKF[4:0] */
563 tmp = lcdc_read_chan(ch, LDDFR);
564 tmp &= ~0x0001001f;
565 switch (ch->info->var.bits_per_pixel) {
566 case 16:
567 tmp |= 0x03;
568 break;
569 case 24:
570 tmp |= 0x0b;
571 break;
572 case 32:
573 break;
574 }
575 lcdc_write_chan(ch, LDDFR, tmp);
576
577 /* point out our frame buffer */
578 lcdc_write_chan(ch, LDSA1R, ch->info->fix.smem_start);
579
580 /* set line size */
581 lcdc_write_chan(ch, LDMLSR, ch->info->fix.line_length);
582
583 /* setup deferred io if SYS bus */
584 tmp = ch->cfg.sys_bus_cfg.deferred_io_msec;
585 if (ch->ldmt1r_value & (1 << 12) && tmp) {
586 ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
587 ch->defio.delay = msecs_to_jiffies(tmp);
588 ch->info->fbdefio = &ch->defio;
589 fb_deferred_io_init(ch->info);
590
591 /* one-shot mode */
592 lcdc_write_chan(ch, LDSM1R, 1);
593
594 /* enable "Frame End Interrupt Enable" bit */
595 lcdc_write(priv, _LDINTR, LDINTR_FE);
596
597 } else {
598 /* continuous read mode */
599 lcdc_write_chan(ch, LDSM1R, 0);
600 }
601 }
602
603 /* display output */
604 lcdc_write(priv, _LDCNT1R, LCDC_ENABLE);
605
606 /* start the lcdc */
607 sh_mobile_lcdc_start_stop(priv, 1);
608 priv->started = 1;
609
610 /* tell the board code to enable the panel */
611 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
612 ch = &priv->ch[k];
613 if (!ch->enabled)
614 continue;
615
616 board_cfg = &ch->cfg.board_cfg;
617 if (try_module_get(board_cfg->owner) && board_cfg->display_on) {
618 board_cfg->display_on(board_cfg->board_data, ch->info);
619 module_put(board_cfg->owner);
620 }
621 }
622
623 return 0;
624 }
625
626 static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
627 {
628 struct sh_mobile_lcdc_chan *ch;
629 struct sh_mobile_lcdc_board_cfg *board_cfg;
630 int k;
631
632 /* clean up deferred io and ask board code to disable panel */
633 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
634 ch = &priv->ch[k];
635 if (!ch->enabled)
636 continue;
637
638 /* deferred io mode:
639 * flush frame, and wait for frame end interrupt
640 * clean up deferred io and enable clock
641 */
642 if (ch->info && ch->info->fbdefio) {
643 ch->frame_end = 0;
644 schedule_delayed_work(&ch->info->deferred_work, 0);
645 wait_event(ch->frame_end_wait, ch->frame_end);
646 fb_deferred_io_cleanup(ch->info);
647 ch->info->fbdefio = NULL;
648 sh_mobile_lcdc_clk_on(priv);
649 }
650
651 board_cfg = &ch->cfg.board_cfg;
652 if (try_module_get(board_cfg->owner) && board_cfg->display_off) {
653 board_cfg->display_off(board_cfg->board_data);
654 module_put(board_cfg->owner);
655 }
656 }
657
658 /* stop the lcdc */
659 if (priv->started) {
660 sh_mobile_lcdc_start_stop(priv, 0);
661 priv->started = 0;
662 }
663
664 /* stop clocks */
665 for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
666 if (priv->ch[k].enabled)
667 sh_mobile_lcdc_clk_off(priv);
668 }
669
670 static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
671 {
672 int ifm, miftyp;
673
674 switch (ch->cfg.interface_type) {
675 case RGB8: ifm = 0; miftyp = 0; break;
676 case RGB9: ifm = 0; miftyp = 4; break;
677 case RGB12A: ifm = 0; miftyp = 5; break;
678 case RGB12B: ifm = 0; miftyp = 6; break;
679 case RGB16: ifm = 0; miftyp = 7; break;
680 case RGB18: ifm = 0; miftyp = 10; break;
681 case RGB24: ifm = 0; miftyp = 11; break;
682 case SYS8A: ifm = 1; miftyp = 0; break;
683 case SYS8B: ifm = 1; miftyp = 1; break;
684 case SYS8C: ifm = 1; miftyp = 2; break;
685 case SYS8D: ifm = 1; miftyp = 3; break;
686 case SYS9: ifm = 1; miftyp = 4; break;
687 case SYS12: ifm = 1; miftyp = 5; break;
688 case SYS16A: ifm = 1; miftyp = 7; break;
689 case SYS16B: ifm = 1; miftyp = 8; break;
690 case SYS16C: ifm = 1; miftyp = 9; break;
691 case SYS18: ifm = 1; miftyp = 10; break;
692 case SYS24: ifm = 1; miftyp = 11; break;
693 default: goto bad;
694 }
695
696 /* SUBLCD only supports SYS interface */
697 if (lcdc_chan_is_sublcd(ch)) {
698 if (ifm == 0)
699 goto bad;
700 else
701 ifm = 0;
702 }
703
704 ch->ldmt1r_value = (ifm << 12) | miftyp;
705 return 0;
706 bad:
707 return -EINVAL;
708 }
709
710 static int sh_mobile_lcdc_setup_clocks(struct platform_device *pdev,
711 int clock_source,
712 struct sh_mobile_lcdc_priv *priv)
713 {
714 char *str;
715 int icksel;
716
717 switch (clock_source) {
718 case LCDC_CLK_BUS: str = "bus_clk"; icksel = 0; break;
719 case LCDC_CLK_PERIPHERAL: str = "peripheral_clk"; icksel = 1; break;
720 case LCDC_CLK_EXTERNAL: str = NULL; icksel = 2; break;
721 default:
722 return -EINVAL;
723 }
724
725 priv->lddckr = icksel << 16;
726
727 if (str) {
728 priv->dot_clk = clk_get(&pdev->dev, str);
729 if (IS_ERR(priv->dot_clk)) {
730 dev_err(&pdev->dev, "cannot get dot clock %s\n", str);
731 return PTR_ERR(priv->dot_clk);
732 }
733 }
734
735 /* Runtime PM support involves two step for this driver:
736 * 1) Enable Runtime PM
737 * 2) Force Runtime PM Resume since hardware is accessed from probe()
738 */
739 priv->dev = &pdev->dev;
740 pm_runtime_enable(priv->dev);
741 pm_runtime_resume(priv->dev);
742 return 0;
743 }
744
745 static int sh_mobile_lcdc_setcolreg(u_int regno,
746 u_int red, u_int green, u_int blue,
747 u_int transp, struct fb_info *info)
748 {
749 u32 *palette = info->pseudo_palette;
750
751 if (regno >= PALETTE_NR)
752 return -EINVAL;
753
754 /* only FB_VISUAL_TRUECOLOR supported */
755
756 red >>= 16 - info->var.red.length;
757 green >>= 16 - info->var.green.length;
758 blue >>= 16 - info->var.blue.length;
759 transp >>= 16 - info->var.transp.length;
760
761 palette[regno] = (red << info->var.red.offset) |
762 (green << info->var.green.offset) |
763 (blue << info->var.blue.offset) |
764 (transp << info->var.transp.offset);
765
766 return 0;
767 }
768
769 static struct fb_fix_screeninfo sh_mobile_lcdc_fix = {
770 .id = "SH Mobile LCDC",
771 .type = FB_TYPE_PACKED_PIXELS,
772 .visual = FB_VISUAL_TRUECOLOR,
773 .accel = FB_ACCEL_NONE,
774 .xpanstep = 0,
775 .ypanstep = 1,
776 .ywrapstep = 0,
777 };
778
779 static void sh_mobile_lcdc_fillrect(struct fb_info *info,
780 const struct fb_fillrect *rect)
781 {
782 sys_fillrect(info, rect);
783 sh_mobile_lcdc_deferred_io_touch(info);
784 }
785
786 static void sh_mobile_lcdc_copyarea(struct fb_info *info,
787 const struct fb_copyarea *area)
788 {
789 sys_copyarea(info, area);
790 sh_mobile_lcdc_deferred_io_touch(info);
791 }
792
793 static void sh_mobile_lcdc_imageblit(struct fb_info *info,
794 const struct fb_image *image)
795 {
796 sys_imageblit(info, image);
797 sh_mobile_lcdc_deferred_io_touch(info);
798 }
799
800 static int sh_mobile_fb_pan_display(struct fb_var_screeninfo *var,
801 struct fb_info *info)
802 {
803 struct sh_mobile_lcdc_chan *ch = info->par;
804 struct sh_mobile_lcdc_priv *priv = ch->lcdc;
805 unsigned long ldrcntr;
806 unsigned long new_pan_offset;
807
808 new_pan_offset = (var->yoffset * info->fix.line_length) +
809 (var->xoffset * (info->var.bits_per_pixel / 8));
810
811 if (new_pan_offset == ch->pan_offset)
812 return 0; /* No change, do nothing */
813
814 ldrcntr = lcdc_read(priv, _LDRCNTR);
815
816 /* Set the source address for the next refresh */
817 lcdc_write_chan_mirror(ch, LDSA1R, ch->dma_handle + new_pan_offset);
818 if (lcdc_chan_is_sublcd(ch))
819 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
820 else
821 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS);
822
823 ch->pan_offset = new_pan_offset;
824
825 sh_mobile_lcdc_deferred_io_touch(info);
826
827 return 0;
828 }
829
830 static int sh_mobile_wait_for_vsync(struct fb_info *info)
831 {
832 struct sh_mobile_lcdc_chan *ch = info->par;
833 unsigned long ldintr;
834 int ret;
835
836 /* Enable VSync End interrupt */
837 ldintr = lcdc_read(ch->lcdc, _LDINTR);
838 ldintr |= LDINTR_VEE;
839 lcdc_write(ch->lcdc, _LDINTR, ldintr);
840
841 ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion,
842 msecs_to_jiffies(100));
843 if (!ret)
844 return -ETIMEDOUT;
845
846 return 0;
847 }
848
849 static int sh_mobile_ioctl(struct fb_info *info, unsigned int cmd,
850 unsigned long arg)
851 {
852 int retval;
853
854 switch (cmd) {
855 case FBIO_WAITFORVSYNC:
856 retval = sh_mobile_wait_for_vsync(info);
857 break;
858
859 default:
860 retval = -ENOIOCTLCMD;
861 break;
862 }
863 return retval;
864 }
865
866 static void sh_mobile_fb_reconfig(struct fb_info *info)
867 {
868 struct sh_mobile_lcdc_chan *ch = info->par;
869 struct fb_videomode mode1, mode2;
870 struct fb_event event;
871 int evnt = FB_EVENT_MODE_CHANGE_ALL;
872
873 if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par))
874 /* More framebuffer users are active */
875 return;
876
877 fb_var_to_videomode(&mode1, &ch->display_var);
878 fb_var_to_videomode(&mode2, &info->var);
879
880 if (fb_mode_is_equal(&mode1, &mode2))
881 return;
882
883 /* Display has been re-plugged, framebuffer is free now, reconfigure */
884 if (fb_set_var(info, &ch->display_var) < 0)
885 /* Couldn't reconfigure, hopefully, can continue as before */
886 return;
887
888 info->fix.line_length = mode1.xres * (ch->cfg.bpp / 8);
889
890 /*
891 * fb_set_var() calls the notifier change internally, only if
892 * FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a
893 * user event, we have to call the chain ourselves.
894 */
895 event.info = info;
896 event.data = &mode1;
897 fb_notifier_call_chain(evnt, &event);
898 }
899
900 /*
901 * Locking: both .fb_release() and .fb_open() are called with info->lock held if
902 * user == 1, or with console sem held, if user == 0.
903 */
904 static int sh_mobile_release(struct fb_info *info, int user)
905 {
906 struct sh_mobile_lcdc_chan *ch = info->par;
907
908 mutex_lock(&ch->open_lock);
909 dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
910
911 ch->use_count--;
912
913 /* Nothing to reconfigure, when called from fbcon */
914 if (user) {
915 acquire_console_sem();
916 sh_mobile_fb_reconfig(info);
917 release_console_sem();
918 }
919
920 mutex_unlock(&ch->open_lock);
921
922 return 0;
923 }
924
925 static int sh_mobile_open(struct fb_info *info, int user)
926 {
927 struct sh_mobile_lcdc_chan *ch = info->par;
928
929 mutex_lock(&ch->open_lock);
930 ch->use_count++;
931
932 dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
933 mutex_unlock(&ch->open_lock);
934
935 return 0;
936 }
937
938 static int sh_mobile_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
939 {
940 struct sh_mobile_lcdc_chan *ch = info->par;
941 struct sh_mobile_lcdc_priv *p = ch->lcdc;
942
943 if (var->xres > MAX_XRES || var->yres > MAX_YRES ||
944 var->xres * var->yres * (ch->cfg.bpp / 8) * 2 > info->fix.smem_len) {
945 dev_warn(info->dev, "Invalid info: %u-%u-%u-%u x %u-%u-%u-%u @ %lukHz!\n",
946 var->left_margin, var->xres, var->right_margin, var->hsync_len,
947 var->upper_margin, var->yres, var->lower_margin, var->vsync_len,
948 PICOS2KHZ(var->pixclock));
949 return -EINVAL;
950 }
951
952 /* only accept the forced_bpp for dual channel configurations */
953 if (p->forced_bpp && p->forced_bpp != var->bits_per_pixel)
954 return -EINVAL;
955
956 switch (var->bits_per_pixel) {
957 case 16: /* PKF[4:0] = 00011 - RGB 565 */
958 case 24: /* PKF[4:0] = 01011 - RGB 888 */
959 case 32: /* PKF[4:0] = 00000 - RGBA 888 */
960 break;
961 default:
962 return -EINVAL;
963 }
964
965 return 0;
966 }
967
968 static struct fb_ops sh_mobile_lcdc_ops = {
969 .owner = THIS_MODULE,
970 .fb_setcolreg = sh_mobile_lcdc_setcolreg,
971 .fb_read = fb_sys_read,
972 .fb_write = fb_sys_write,
973 .fb_fillrect = sh_mobile_lcdc_fillrect,
974 .fb_copyarea = sh_mobile_lcdc_copyarea,
975 .fb_imageblit = sh_mobile_lcdc_imageblit,
976 .fb_pan_display = sh_mobile_fb_pan_display,
977 .fb_ioctl = sh_mobile_ioctl,
978 .fb_open = sh_mobile_open,
979 .fb_release = sh_mobile_release,
980 .fb_check_var = sh_mobile_check_var,
981 };
982
983 static int sh_mobile_lcdc_set_bpp(struct fb_var_screeninfo *var, int bpp)
984 {
985 switch (bpp) {
986 case 16: /* PKF[4:0] = 00011 - RGB 565 */
987 var->red.offset = 11;
988 var->red.length = 5;
989 var->green.offset = 5;
990 var->green.length = 6;
991 var->blue.offset = 0;
992 var->blue.length = 5;
993 var->transp.offset = 0;
994 var->transp.length = 0;
995 break;
996
997 case 24: /* PKF[4:0] = 01011 - RGB 888 */
998 var->red.offset = 16;
999 var->red.length = 8;
1000 var->green.offset = 8;
1001 var->green.length = 8;
1002 var->blue.offset = 0;
1003 var->blue.length = 8;
1004 var->transp.offset = 0;
1005 var->transp.length = 0;
1006 break;
1007
1008 case 32: /* PKF[4:0] = 00000 - RGBA 888 */
1009 var->red.offset = 16;
1010 var->red.length = 8;
1011 var->green.offset = 8;
1012 var->green.length = 8;
1013 var->blue.offset = 0;
1014 var->blue.length = 8;
1015 var->transp.offset = 24;
1016 var->transp.length = 8;
1017 break;
1018 default:
1019 return -EINVAL;
1020 }
1021 var->bits_per_pixel = bpp;
1022 var->red.msb_right = 0;
1023 var->green.msb_right = 0;
1024 var->blue.msb_right = 0;
1025 var->transp.msb_right = 0;
1026 return 0;
1027 }
1028
1029 static int sh_mobile_lcdc_suspend(struct device *dev)
1030 {
1031 struct platform_device *pdev = to_platform_device(dev);
1032
1033 sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
1034 return 0;
1035 }
1036
1037 static int sh_mobile_lcdc_resume(struct device *dev)
1038 {
1039 struct platform_device *pdev = to_platform_device(dev);
1040
1041 return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
1042 }
1043
1044 static int sh_mobile_lcdc_runtime_suspend(struct device *dev)
1045 {
1046 struct platform_device *pdev = to_platform_device(dev);
1047 struct sh_mobile_lcdc_priv *p = platform_get_drvdata(pdev);
1048 struct sh_mobile_lcdc_chan *ch;
1049 int k, n;
1050
1051 /* save per-channel registers */
1052 for (k = 0; k < ARRAY_SIZE(p->ch); k++) {
1053 ch = &p->ch[k];
1054 if (!ch->enabled)
1055 continue;
1056 for (n = 0; n < NR_CH_REGS; n++)
1057 ch->saved_ch_regs[n] = lcdc_read_chan(ch, n);
1058 }
1059
1060 /* save shared registers */
1061 for (n = 0; n < NR_SHARED_REGS; n++)
1062 p->saved_shared_regs[n] = lcdc_read(p, lcdc_shared_regs[n]);
1063
1064 /* turn off LCDC hardware */
1065 lcdc_write(p, _LDCNT1R, 0);
1066 return 0;
1067 }
1068
1069 static int sh_mobile_lcdc_runtime_resume(struct device *dev)
1070 {
1071 struct platform_device *pdev = to_platform_device(dev);
1072 struct sh_mobile_lcdc_priv *p = platform_get_drvdata(pdev);
1073 struct sh_mobile_lcdc_chan *ch;
1074 int k, n;
1075
1076 /* restore per-channel registers */
1077 for (k = 0; k < ARRAY_SIZE(p->ch); k++) {
1078 ch = &p->ch[k];
1079 if (!ch->enabled)
1080 continue;
1081 for (n = 0; n < NR_CH_REGS; n++)
1082 lcdc_write_chan(ch, n, ch->saved_ch_regs[n]);
1083 }
1084
1085 /* restore shared registers */
1086 for (n = 0; n < NR_SHARED_REGS; n++)
1087 lcdc_write(p, lcdc_shared_regs[n], p->saved_shared_regs[n]);
1088
1089 return 0;
1090 }
1091
1092 static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
1093 .suspend = sh_mobile_lcdc_suspend,
1094 .resume = sh_mobile_lcdc_resume,
1095 .runtime_suspend = sh_mobile_lcdc_runtime_suspend,
1096 .runtime_resume = sh_mobile_lcdc_runtime_resume,
1097 };
1098
1099 /* locking: called with info->lock held */
1100 static int sh_mobile_lcdc_notify(struct notifier_block *nb,
1101 unsigned long action, void *data)
1102 {
1103 struct fb_event *event = data;
1104 struct fb_info *info = event->info;
1105 struct sh_mobile_lcdc_chan *ch = info->par;
1106 struct sh_mobile_lcdc_board_cfg *board_cfg = &ch->cfg.board_cfg;
1107 int ret;
1108
1109 if (&ch->lcdc->notifier != nb)
1110 return NOTIFY_DONE;
1111
1112 dev_dbg(info->dev, "%s(): action = %lu, data = %p\n",
1113 __func__, action, event->data);
1114
1115 switch(action) {
1116 case FB_EVENT_SUSPEND:
1117 if (try_module_get(board_cfg->owner) && board_cfg->display_off) {
1118 board_cfg->display_off(board_cfg->board_data);
1119 module_put(board_cfg->owner);
1120 }
1121 pm_runtime_put(info->device);
1122 sh_mobile_lcdc_stop(ch->lcdc);
1123 break;
1124 case FB_EVENT_RESUME:
1125 mutex_lock(&ch->open_lock);
1126 sh_mobile_fb_reconfig(info);
1127 mutex_unlock(&ch->open_lock);
1128
1129 /* HDMI must be enabled before LCDC configuration */
1130 if (try_module_get(board_cfg->owner) && board_cfg->display_on) {
1131 board_cfg->display_on(board_cfg->board_data, info);
1132 module_put(board_cfg->owner);
1133 }
1134
1135 ret = sh_mobile_lcdc_start(ch->lcdc);
1136 if (!ret)
1137 pm_runtime_get_sync(info->device);
1138 }
1139
1140 return NOTIFY_OK;
1141 }
1142
1143 static int sh_mobile_lcdc_remove(struct platform_device *pdev);
1144
1145 static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev)
1146 {
1147 struct fb_info *info;
1148 struct sh_mobile_lcdc_priv *priv;
1149 struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data;
1150 struct resource *res;
1151 int error;
1152 void *buf;
1153 int i, j;
1154
1155 if (!pdata) {
1156 dev_err(&pdev->dev, "no platform data defined\n");
1157 return -EINVAL;
1158 }
1159
1160 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1161 i = platform_get_irq(pdev, 0);
1162 if (!res || i < 0) {
1163 dev_err(&pdev->dev, "cannot get platform resources\n");
1164 return -ENOENT;
1165 }
1166
1167 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
1168 if (!priv) {
1169 dev_err(&pdev->dev, "cannot allocate device data\n");
1170 return -ENOMEM;
1171 }
1172
1173 platform_set_drvdata(pdev, priv);
1174
1175 error = request_irq(i, sh_mobile_lcdc_irq, IRQF_DISABLED,
1176 dev_name(&pdev->dev), priv);
1177 if (error) {
1178 dev_err(&pdev->dev, "unable to request irq\n");
1179 goto err1;
1180 }
1181
1182 priv->irq = i;
1183 atomic_set(&priv->hw_usecnt, -1);
1184
1185 j = 0;
1186 for (i = 0; i < ARRAY_SIZE(pdata->ch); i++) {
1187 struct sh_mobile_lcdc_chan *ch = priv->ch + j;
1188
1189 ch->lcdc = priv;
1190 memcpy(&ch->cfg, &pdata->ch[i], sizeof(pdata->ch[i]));
1191
1192 error = sh_mobile_lcdc_check_interface(ch);
1193 if (error) {
1194 dev_err(&pdev->dev, "unsupported interface type\n");
1195 goto err1;
1196 }
1197 init_waitqueue_head(&ch->frame_end_wait);
1198 init_completion(&ch->vsync_completion);
1199 ch->pan_offset = 0;
1200
1201 switch (pdata->ch[i].chan) {
1202 case LCDC_CHAN_MAINLCD:
1203 ch->enabled = 1 << 1;
1204 ch->reg_offs = lcdc_offs_mainlcd;
1205 j++;
1206 break;
1207 case LCDC_CHAN_SUBLCD:
1208 ch->enabled = 1 << 2;
1209 ch->reg_offs = lcdc_offs_sublcd;
1210 j++;
1211 break;
1212 }
1213 }
1214
1215 if (!j) {
1216 dev_err(&pdev->dev, "no channels defined\n");
1217 error = -EINVAL;
1218 goto err1;
1219 }
1220
1221 /* for dual channel LCDC (MAIN + SUB) force shared bpp setting */
1222 if (j == 2)
1223 priv->forced_bpp = pdata->ch[0].bpp;
1224
1225 priv->base = ioremap_nocache(res->start, resource_size(res));
1226 if (!priv->base)
1227 goto err1;
1228
1229 error = sh_mobile_lcdc_setup_clocks(pdev, pdata->clock_source, priv);
1230 if (error) {
1231 dev_err(&pdev->dev, "unable to setup clocks\n");
1232 goto err1;
1233 }
1234
1235 for (i = 0; i < j; i++) {
1236 struct fb_var_screeninfo *var;
1237 const struct fb_videomode *lcd_cfg, *max_cfg = NULL;
1238 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
1239 struct sh_mobile_lcdc_chan_cfg *cfg = &ch->cfg;
1240 const struct fb_videomode *mode = cfg->lcd_cfg;
1241 unsigned long max_size = 0;
1242 int k;
1243 int num_cfg;
1244
1245 ch->info = framebuffer_alloc(0, &pdev->dev);
1246 if (!ch->info) {
1247 dev_err(&pdev->dev, "unable to allocate fb_info\n");
1248 error = -ENOMEM;
1249 break;
1250 }
1251
1252 info = ch->info;
1253 var = &info->var;
1254 info->fbops = &sh_mobile_lcdc_ops;
1255 info->par = ch;
1256
1257 mutex_init(&ch->open_lock);
1258
1259 for (k = 0, lcd_cfg = mode;
1260 k < cfg->num_cfg && lcd_cfg;
1261 k++, lcd_cfg++) {
1262 unsigned long size = lcd_cfg->yres * lcd_cfg->xres;
1263
1264 if (size > max_size) {
1265 max_cfg = lcd_cfg;
1266 max_size = size;
1267 }
1268 }
1269
1270 if (!mode)
1271 max_size = MAX_XRES * MAX_YRES;
1272 else if (max_cfg)
1273 dev_dbg(&pdev->dev, "Found largest videomode %ux%u\n",
1274 max_cfg->xres, max_cfg->yres);
1275
1276 info->fix = sh_mobile_lcdc_fix;
1277 info->fix.smem_len = max_size * (cfg->bpp / 8) * 2;
1278
1279 if (!mode) {
1280 mode = &default_720p;
1281 num_cfg = 1;
1282 } else {
1283 num_cfg = cfg->num_cfg;
1284 }
1285
1286 fb_videomode_to_modelist(mode, num_cfg, &info->modelist);
1287
1288 fb_videomode_to_var(var, mode);
1289 var->width = cfg->lcd_size_cfg.width;
1290 var->height = cfg->lcd_size_cfg.height;
1291 /* Default Y virtual resolution is 2x panel size */
1292 var->yres_virtual = var->yres * 2;
1293 var->activate = FB_ACTIVATE_NOW;
1294
1295 error = sh_mobile_lcdc_set_bpp(var, cfg->bpp);
1296 if (error)
1297 break;
1298
1299 buf = dma_alloc_coherent(&pdev->dev, info->fix.smem_len,
1300 &ch->dma_handle, GFP_KERNEL);
1301 if (!buf) {
1302 dev_err(&pdev->dev, "unable to allocate buffer\n");
1303 error = -ENOMEM;
1304 break;
1305 }
1306
1307 info->pseudo_palette = &ch->pseudo_palette;
1308 info->flags = FBINFO_FLAG_DEFAULT;
1309
1310 error = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
1311 if (error < 0) {
1312 dev_err(&pdev->dev, "unable to allocate cmap\n");
1313 dma_free_coherent(&pdev->dev, info->fix.smem_len,
1314 buf, ch->dma_handle);
1315 break;
1316 }
1317
1318 info->fix.smem_start = ch->dma_handle;
1319 info->fix.line_length = var->xres * (cfg->bpp / 8);
1320 info->screen_base = buf;
1321 info->device = &pdev->dev;
1322 ch->display_var = *var;
1323 }
1324
1325 if (error)
1326 goto err1;
1327
1328 error = sh_mobile_lcdc_start(priv);
1329 if (error) {
1330 dev_err(&pdev->dev, "unable to start hardware\n");
1331 goto err1;
1332 }
1333
1334 for (i = 0; i < j; i++) {
1335 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
1336
1337 info = ch->info;
1338
1339 if (info->fbdefio) {
1340 ch->sglist = vmalloc(sizeof(struct scatterlist) *
1341 info->fix.smem_len >> PAGE_SHIFT);
1342 if (!ch->sglist) {
1343 dev_err(&pdev->dev, "cannot allocate sglist\n");
1344 goto err1;
1345 }
1346 }
1347
1348 error = register_framebuffer(info);
1349 if (error < 0)
1350 goto err1;
1351
1352 dev_info(info->dev,
1353 "registered %s/%s as %dx%d %dbpp.\n",
1354 pdev->name,
1355 (ch->cfg.chan == LCDC_CHAN_MAINLCD) ?
1356 "mainlcd" : "sublcd",
1357 info->var.xres, info->var.yres,
1358 ch->cfg.bpp);
1359
1360 /* deferred io mode: disable clock to save power */
1361 if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED)
1362 sh_mobile_lcdc_clk_off(priv);
1363 }
1364
1365 /* Failure ignored */
1366 priv->notifier.notifier_call = sh_mobile_lcdc_notify;
1367 fb_register_client(&priv->notifier);
1368
1369 return 0;
1370 err1:
1371 sh_mobile_lcdc_remove(pdev);
1372
1373 return error;
1374 }
1375
1376 static int sh_mobile_lcdc_remove(struct platform_device *pdev)
1377 {
1378 struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
1379 struct fb_info *info;
1380 int i;
1381
1382 fb_unregister_client(&priv->notifier);
1383
1384 for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
1385 if (priv->ch[i].info && priv->ch[i].info->dev)
1386 unregister_framebuffer(priv->ch[i].info);
1387
1388 sh_mobile_lcdc_stop(priv);
1389
1390 for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
1391 info = priv->ch[i].info;
1392
1393 if (!info || !info->device)
1394 continue;
1395
1396 if (priv->ch[i].sglist)
1397 vfree(priv->ch[i].sglist);
1398
1399 if (info->screen_base)
1400 dma_free_coherent(&pdev->dev, info->fix.smem_len,
1401 info->screen_base,
1402 priv->ch[i].dma_handle);
1403 fb_dealloc_cmap(&info->cmap);
1404 framebuffer_release(info);
1405 }
1406
1407 if (priv->dot_clk)
1408 clk_put(priv->dot_clk);
1409
1410 if (priv->dev)
1411 pm_runtime_disable(priv->dev);
1412
1413 if (priv->base)
1414 iounmap(priv->base);
1415
1416 if (priv->irq)
1417 free_irq(priv->irq, priv);
1418 kfree(priv);
1419 return 0;
1420 }
1421
1422 static struct platform_driver sh_mobile_lcdc_driver = {
1423 .driver = {
1424 .name = "sh_mobile_lcdc_fb",
1425 .owner = THIS_MODULE,
1426 .pm = &sh_mobile_lcdc_dev_pm_ops,
1427 },
1428 .probe = sh_mobile_lcdc_probe,
1429 .remove = sh_mobile_lcdc_remove,
1430 };
1431
1432 static int __init sh_mobile_lcdc_init(void)
1433 {
1434 return platform_driver_register(&sh_mobile_lcdc_driver);
1435 }
1436
1437 static void __exit sh_mobile_lcdc_exit(void)
1438 {
1439 platform_driver_unregister(&sh_mobile_lcdc_driver);
1440 }
1441
1442 module_init(sh_mobile_lcdc_init);
1443 module_exit(sh_mobile_lcdc_exit);
1444
1445 MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
1446 MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
1447 MODULE_LICENSE("GPL v2");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree