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JBD: round commit timer up to avoid uncommitted transaction
[linux/fpc-iii.git] / drivers / video / sh_mobile_lcdcfb.c
blob07f22b625632872c10476c33ab5dab5e97792adc
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/fb.h>
16 #include <linux/clk.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 <video/sh_mobile_lcdc.h>
22 #include <asm/atomic.h>
23
24 #define PALETTE_NR 16
25
26 struct sh_mobile_lcdc_priv;
27 struct sh_mobile_lcdc_chan {
28 struct sh_mobile_lcdc_priv *lcdc;
29 unsigned long *reg_offs;
30 unsigned long ldmt1r_value;
31 unsigned long enabled; /* ME and SE in LDCNT2R */
32 struct sh_mobile_lcdc_chan_cfg cfg;
33 u32 pseudo_palette[PALETTE_NR];
34 struct fb_info *info;
35 dma_addr_t dma_handle;
36 struct fb_deferred_io defio;
37 struct scatterlist *sglist;
38 unsigned long frame_end;
39 wait_queue_head_t frame_end_wait;
40 };
41
42 struct sh_mobile_lcdc_priv {
43 void __iomem *base;
44 int irq;
45 #ifdef CONFIG_HAVE_CLK
46 atomic_t clk_usecnt;
47 struct clk *dot_clk;
48 struct clk *clk;
49 #endif
50 unsigned long lddckr;
51 struct sh_mobile_lcdc_chan ch[2];
52 int started;
53 };
54
55 /* shared registers */
56 #define _LDDCKR 0x410
57 #define _LDDCKSTPR 0x414
58 #define _LDINTR 0x468
59 #define _LDSR 0x46c
60 #define _LDCNT1R 0x470
61 #define _LDCNT2R 0x474
62 #define _LDDDSR 0x47c
63 #define _LDDWD0R 0x800
64 #define _LDDRDR 0x840
65 #define _LDDWAR 0x900
66 #define _LDDRAR 0x904
67
68 /* per-channel registers */
69 enum { LDDCKPAT1R, LDDCKPAT2R, LDMT1R, LDMT2R, LDMT3R, LDDFR, LDSM1R,
70 LDSM2R, LDSA1R, LDMLSR, LDHCNR, LDHSYNR, LDVLNR, LDVSYNR, LDPMR };
71
72 static unsigned long lcdc_offs_mainlcd[] = {
73 [LDDCKPAT1R] = 0x400,
74 [LDDCKPAT2R] = 0x404,
75 [LDMT1R] = 0x418,
76 [LDMT2R] = 0x41c,
77 [LDMT3R] = 0x420,
78 [LDDFR] = 0x424,
79 [LDSM1R] = 0x428,
80 [LDSM2R] = 0x42c,
81 [LDSA1R] = 0x430,
82 [LDMLSR] = 0x438,
83 [LDHCNR] = 0x448,
84 [LDHSYNR] = 0x44c,
85 [LDVLNR] = 0x450,
86 [LDVSYNR] = 0x454,
87 [LDPMR] = 0x460,
88 };
89
90 static unsigned long lcdc_offs_sublcd[] = {
91 [LDDCKPAT1R] = 0x408,
92 [LDDCKPAT2R] = 0x40c,
93 [LDMT1R] = 0x600,
94 [LDMT2R] = 0x604,
95 [LDMT3R] = 0x608,
96 [LDDFR] = 0x60c,
97 [LDSM1R] = 0x610,
98 [LDSM2R] = 0x614,
99 [LDSA1R] = 0x618,
100 [LDMLSR] = 0x620,
101 [LDHCNR] = 0x624,
102 [LDHSYNR] = 0x628,
103 [LDVLNR] = 0x62c,
104 [LDVSYNR] = 0x630,
105 [LDPMR] = 0x63c,
106 };
107
108 #define START_LCDC 0x00000001
109 #define LCDC_RESET 0x00000100
110 #define DISPLAY_BEU 0x00000008
111 #define LCDC_ENABLE 0x00000001
112 #define LDINTR_FE 0x00000400
113 #define LDINTR_FS 0x00000004
114
115 static void lcdc_write_chan(struct sh_mobile_lcdc_chan *chan,
116 int reg_nr, unsigned long data)
117 {
118 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr]);
119 }
120
121 static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan *chan,
122 int reg_nr)
123 {
124 return ioread32(chan->lcdc->base + chan->reg_offs[reg_nr]);
125 }
126
127 static void lcdc_write(struct sh_mobile_lcdc_priv *priv,
128 unsigned long reg_offs, unsigned long data)
129 {
130 iowrite32(data, priv->base + reg_offs);
131 }
132
133 static unsigned long lcdc_read(struct sh_mobile_lcdc_priv *priv,
134 unsigned long reg_offs)
135 {
136 return ioread32(priv->base + reg_offs);
137 }
138
139 static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv,
140 unsigned long reg_offs,
141 unsigned long mask, unsigned long until)
142 {
143 while ((lcdc_read(priv, reg_offs) & mask) != until)
144 cpu_relax();
145 }
146
147 static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan)
148 {
149 return chan->cfg.chan == LCDC_CHAN_SUBLCD;
150 }
151
152 static void lcdc_sys_write_index(void *handle, unsigned long data)
153 {
154 struct sh_mobile_lcdc_chan *ch = handle;
155
156 lcdc_write(ch->lcdc, _LDDWD0R, data | 0x10000000);
157 lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
158 lcdc_write(ch->lcdc, _LDDWAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
159 }
160
161 static void lcdc_sys_write_data(void *handle, unsigned long data)
162 {
163 struct sh_mobile_lcdc_chan *ch = handle;
164
165 lcdc_write(ch->lcdc, _LDDWD0R, data | 0x11000000);
166 lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
167 lcdc_write(ch->lcdc, _LDDWAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
168 }
169
170 static unsigned long lcdc_sys_read_data(void *handle)
171 {
172 struct sh_mobile_lcdc_chan *ch = handle;
173
174 lcdc_write(ch->lcdc, _LDDRDR, 0x01000000);
175 lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
176 lcdc_write(ch->lcdc, _LDDRAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
177 udelay(1);
178
179 return lcdc_read(ch->lcdc, _LDDRDR) & 0xffff;
180 }
181
182 struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = {
183 lcdc_sys_write_index,
184 lcdc_sys_write_data,
185 lcdc_sys_read_data,
186 };
187
188 #ifdef CONFIG_HAVE_CLK
189 static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv)
190 {
191 if (atomic_inc_and_test(&priv->clk_usecnt)) {
192 clk_enable(priv->clk);
193 if (priv->dot_clk)
194 clk_enable(priv->dot_clk);
195 }
196 }
197
198 static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv)
199 {
200 if (atomic_sub_return(1, &priv->clk_usecnt) == -1) {
201 if (priv->dot_clk)
202 clk_disable(priv->dot_clk);
203 clk_disable(priv->clk);
204 }
205 }
206 #else
207 static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv) {}
208 static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv) {}
209 #endif
210
211 static int sh_mobile_lcdc_sginit(struct fb_info *info,
212 struct list_head *pagelist)
213 {
214 struct sh_mobile_lcdc_chan *ch = info->par;
215 unsigned int nr_pages_max = info->fix.smem_len >> PAGE_SHIFT;
216 struct page *page;
217 int nr_pages = 0;
218
219 sg_init_table(ch->sglist, nr_pages_max);
220
221 list_for_each_entry(page, pagelist, lru)
222 sg_set_page(&ch->sglist[nr_pages++], page, PAGE_SIZE, 0);
223
224 return nr_pages;
225 }
226
227 static void sh_mobile_lcdc_deferred_io(struct fb_info *info,
228 struct list_head *pagelist)
229 {
230 struct sh_mobile_lcdc_chan *ch = info->par;
231 unsigned int nr_pages;
232
233 /* enable clocks before accessing hardware */
234 sh_mobile_lcdc_clk_on(ch->lcdc);
235
236 nr_pages = sh_mobile_lcdc_sginit(info, pagelist);
237 dma_map_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
238
239 /* trigger panel update */
240 lcdc_write_chan(ch, LDSM2R, 1);
241
242 dma_unmap_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
243 }
244
245 static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info)
246 {
247 struct fb_deferred_io *fbdefio = info->fbdefio;
248
249 if (fbdefio)
250 schedule_delayed_work(&info->deferred_work, fbdefio->delay);
251 }
252
253 static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
254 {
255 struct sh_mobile_lcdc_priv *priv = data;
256 struct sh_mobile_lcdc_chan *ch;
257 unsigned long tmp;
258 int is_sub;
259 int k;
260
261 /* acknowledge interrupt */
262 tmp = lcdc_read(priv, _LDINTR);
263 tmp &= 0xffffff00; /* mask in high 24 bits */
264 tmp |= 0x000000ff ^ LDINTR_FS; /* status in low 8 */
265 lcdc_write(priv, _LDINTR, tmp);
266
267 /* figure out if this interrupt is for main or sub lcd */
268 is_sub = (lcdc_read(priv, _LDSR) & (1 << 10)) ? 1 : 0;
269
270 /* wake up channel and disable clocks*/
271 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
272 ch = &priv->ch[k];
273
274 if (!ch->enabled)
275 continue;
276
277 if (is_sub == lcdc_chan_is_sublcd(ch)) {
278 ch->frame_end = 1;
279 wake_up(&ch->frame_end_wait);
280
281 sh_mobile_lcdc_clk_off(priv);
282 }
283 }
284
285 return IRQ_HANDLED;
286 }
287
288 static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv,
289 int start)
290 {
291 unsigned long tmp = lcdc_read(priv, _LDCNT2R);
292 int k;
293
294 /* start or stop the lcdc */
295 if (start)
296 lcdc_write(priv, _LDCNT2R, tmp | START_LCDC);
297 else
298 lcdc_write(priv, _LDCNT2R, tmp & ~START_LCDC);
299
300 /* wait until power is applied/stopped on all channels */
301 for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
302 if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled)
303 while (1) {
304 tmp = lcdc_read_chan(&priv->ch[k], LDPMR) & 3;
305 if (start && tmp == 3)
306 break;
307 if (!start && tmp == 0)
308 break;
309 cpu_relax();
310 }
311
312 if (!start)
313 lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */
314 }
315
316 static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
317 {
318 struct sh_mobile_lcdc_chan *ch;
319 struct fb_videomode *lcd_cfg;
320 struct sh_mobile_lcdc_board_cfg *board_cfg;
321 unsigned long tmp;
322 int k, m;
323 int ret = 0;
324
325 /* enable clocks before accessing the hardware */
326 for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
327 if (priv->ch[k].enabled)
328 sh_mobile_lcdc_clk_on(priv);
329
330 /* reset */
331 lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LCDC_RESET);
332 lcdc_wait_bit(priv, _LDCNT2R, LCDC_RESET, 0);
333
334 /* enable LCDC channels */
335 tmp = lcdc_read(priv, _LDCNT2R);
336 tmp |= priv->ch[0].enabled;
337 tmp |= priv->ch[1].enabled;
338 lcdc_write(priv, _LDCNT2R, tmp);
339
340 /* read data from external memory, avoid using the BEU for now */
341 lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) & ~DISPLAY_BEU);
342
343 /* stop the lcdc first */
344 sh_mobile_lcdc_start_stop(priv, 0);
345
346 /* configure clocks */
347 tmp = priv->lddckr;
348 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
349 ch = &priv->ch[k];
350
351 if (!priv->ch[k].enabled)
352 continue;
353
354 m = ch->cfg.clock_divider;
355 if (!m)
356 continue;
357
358 if (m == 1)
359 m = 1 << 6;
360 tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
361
362 lcdc_write_chan(ch, LDDCKPAT1R, 0x00000000);
363 lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1);
364 }
365
366 lcdc_write(priv, _LDDCKR, tmp);
367
368 /* start dotclock again */
369 lcdc_write(priv, _LDDCKSTPR, 0);
370 lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0);
371
372 /* interrupts are disabled to begin with */
373 lcdc_write(priv, _LDINTR, 0);
374
375 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
376 ch = &priv->ch[k];
377 lcd_cfg = &ch->cfg.lcd_cfg;
378
379 if (!ch->enabled)
380 continue;
381
382 tmp = ch->ldmt1r_value;
383 tmp |= (lcd_cfg->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : 1 << 28;
384 tmp |= (lcd_cfg->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : 1 << 27;
385 tmp |= (ch->cfg.flags & LCDC_FLAGS_DWPOL) ? 1 << 26 : 0;
386 tmp |= (ch->cfg.flags & LCDC_FLAGS_DIPOL) ? 1 << 25 : 0;
387 tmp |= (ch->cfg.flags & LCDC_FLAGS_DAPOL) ? 1 << 24 : 0;
388 tmp |= (ch->cfg.flags & LCDC_FLAGS_HSCNT) ? 1 << 17 : 0;
389 tmp |= (ch->cfg.flags & LCDC_FLAGS_DWCNT) ? 1 << 16 : 0;
390 lcdc_write_chan(ch, LDMT1R, tmp);
391
392 /* setup SYS bus */
393 lcdc_write_chan(ch, LDMT2R, ch->cfg.sys_bus_cfg.ldmt2r);
394 lcdc_write_chan(ch, LDMT3R, ch->cfg.sys_bus_cfg.ldmt3r);
395
396 /* horizontal configuration */
397 tmp = lcd_cfg->xres + lcd_cfg->hsync_len;
398 tmp += lcd_cfg->left_margin;
399 tmp += lcd_cfg->right_margin;
400 tmp /= 8; /* HTCN */
401 tmp |= (lcd_cfg->xres / 8) << 16; /* HDCN */
402 lcdc_write_chan(ch, LDHCNR, tmp);
403
404 tmp = lcd_cfg->xres;
405 tmp += lcd_cfg->right_margin;
406 tmp /= 8; /* HSYNP */
407 tmp |= (lcd_cfg->hsync_len / 8) << 16; /* HSYNW */
408 lcdc_write_chan(ch, LDHSYNR, tmp);
409
410 /* power supply */
411 lcdc_write_chan(ch, LDPMR, 0);
412
413 /* vertical configuration */
414 tmp = lcd_cfg->yres + lcd_cfg->vsync_len;
415 tmp += lcd_cfg->upper_margin;
416 tmp += lcd_cfg->lower_margin; /* VTLN */
417 tmp |= lcd_cfg->yres << 16; /* VDLN */
418 lcdc_write_chan(ch, LDVLNR, tmp);
419
420 tmp = lcd_cfg->yres;
421 tmp += lcd_cfg->lower_margin; /* VSYNP */
422 tmp |= lcd_cfg->vsync_len << 16; /* VSYNW */
423 lcdc_write_chan(ch, LDVSYNR, tmp);
424
425 board_cfg = &ch->cfg.board_cfg;
426 if (board_cfg->setup_sys)
427 ret = board_cfg->setup_sys(board_cfg->board_data, ch,
428 &sh_mobile_lcdc_sys_bus_ops);
429 if (ret)
430 return ret;
431 }
432
433 /* word and long word swap */
434 lcdc_write(priv, _LDDDSR, lcdc_read(priv, _LDDDSR) | 6);
435
436 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
437 ch = &priv->ch[k];
438
439 if (!priv->ch[k].enabled)
440 continue;
441
442 /* set bpp format in PKF[4:0] */
443 tmp = lcdc_read_chan(ch, LDDFR);
444 tmp &= ~(0x0001001f);
445 tmp |= (ch->info->var.bits_per_pixel == 16) ? 3 : 0;
446 lcdc_write_chan(ch, LDDFR, tmp);
447
448 /* point out our frame buffer */
449 lcdc_write_chan(ch, LDSA1R, ch->info->fix.smem_start);
450
451 /* set line size */
452 lcdc_write_chan(ch, LDMLSR, ch->info->fix.line_length);
453
454 /* setup deferred io if SYS bus */
455 tmp = ch->cfg.sys_bus_cfg.deferred_io_msec;
456 if (ch->ldmt1r_value & (1 << 12) && tmp) {
457 ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
458 ch->defio.delay = msecs_to_jiffies(tmp);
459 ch->info->fbdefio = &ch->defio;
460 fb_deferred_io_init(ch->info);
461
462 /* one-shot mode */
463 lcdc_write_chan(ch, LDSM1R, 1);
464
465 /* enable "Frame End Interrupt Enable" bit */
466 lcdc_write(priv, _LDINTR, LDINTR_FE);
467
468 } else {
469 /* continuous read mode */
470 lcdc_write_chan(ch, LDSM1R, 0);
471 }
472 }
473
474 /* display output */
475 lcdc_write(priv, _LDCNT1R, LCDC_ENABLE);
476
477 /* start the lcdc */
478 sh_mobile_lcdc_start_stop(priv, 1);
479 priv->started = 1;
480
481 /* tell the board code to enable the panel */
482 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
483 ch = &priv->ch[k];
484 if (!ch->enabled)
485 continue;
486
487 board_cfg = &ch->cfg.board_cfg;
488 if (board_cfg->display_on)
489 board_cfg->display_on(board_cfg->board_data);
490 }
491
492 return 0;
493 }
494
495 static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
496 {
497 struct sh_mobile_lcdc_chan *ch;
498 struct sh_mobile_lcdc_board_cfg *board_cfg;
499 int k;
500
501 /* clean up deferred io and ask board code to disable panel */
502 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
503 ch = &priv->ch[k];
504 if (!ch->enabled)
505 continue;
506
507 /* deferred io mode:
508 * flush frame, and wait for frame end interrupt
509 * clean up deferred io and enable clock
510 */
511 if (ch->info->fbdefio) {
512 ch->frame_end = 0;
513 schedule_delayed_work(&ch->info->deferred_work, 0);
514 wait_event(ch->frame_end_wait, ch->frame_end);
515 fb_deferred_io_cleanup(ch->info);
516 ch->info->fbdefio = NULL;
517 sh_mobile_lcdc_clk_on(priv);
518 }
519
520 board_cfg = &ch->cfg.board_cfg;
521 if (board_cfg->display_off)
522 board_cfg->display_off(board_cfg->board_data);
523
524 }
525
526 /* stop the lcdc */
527 if (priv->started) {
528 sh_mobile_lcdc_start_stop(priv, 0);
529 priv->started = 0;
530 }
531
532 /* stop clocks */
533 for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
534 if (priv->ch[k].enabled)
535 sh_mobile_lcdc_clk_off(priv);
536 }
537
538 static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
539 {
540 int ifm, miftyp;
541
542 switch (ch->cfg.interface_type) {
543 case RGB8: ifm = 0; miftyp = 0; break;
544 case RGB9: ifm = 0; miftyp = 4; break;
545 case RGB12A: ifm = 0; miftyp = 5; break;
546 case RGB12B: ifm = 0; miftyp = 6; break;
547 case RGB16: ifm = 0; miftyp = 7; break;
548 case RGB18: ifm = 0; miftyp = 10; break;
549 case RGB24: ifm = 0; miftyp = 11; break;
550 case SYS8A: ifm = 1; miftyp = 0; break;
551 case SYS8B: ifm = 1; miftyp = 1; break;
552 case SYS8C: ifm = 1; miftyp = 2; break;
553 case SYS8D: ifm = 1; miftyp = 3; break;
554 case SYS9: ifm = 1; miftyp = 4; break;
555 case SYS12: ifm = 1; miftyp = 5; break;
556 case SYS16A: ifm = 1; miftyp = 7; break;
557 case SYS16B: ifm = 1; miftyp = 8; break;
558 case SYS16C: ifm = 1; miftyp = 9; break;
559 case SYS18: ifm = 1; miftyp = 10; break;
560 case SYS24: ifm = 1; miftyp = 11; break;
561 default: goto bad;
562 }
563
564 /* SUBLCD only supports SYS interface */
565 if (lcdc_chan_is_sublcd(ch)) {
566 if (ifm == 0)
567 goto bad;
568 else
569 ifm = 0;
570 }
571
572 ch->ldmt1r_value = (ifm << 12) | miftyp;
573 return 0;
574 bad:
575 return -EINVAL;
576 }
577
578 static int sh_mobile_lcdc_setup_clocks(struct platform_device *pdev,
579 int clock_source,
580 struct sh_mobile_lcdc_priv *priv)
581 {
582 #ifdef CONFIG_HAVE_CLK
583 char clk_name[8];
584 #endif
585 char *str;
586 int icksel;
587
588 switch (clock_source) {
589 case LCDC_CLK_BUS: str = "bus_clk"; icksel = 0; break;
590 case LCDC_CLK_PERIPHERAL: str = "peripheral_clk"; icksel = 1; break;
591 case LCDC_CLK_EXTERNAL: str = NULL; icksel = 2; break;
592 default:
593 return -EINVAL;
594 }
595
596 priv->lddckr = icksel << 16;
597
598 #ifdef CONFIG_HAVE_CLK
599 atomic_set(&priv->clk_usecnt, -1);
600 snprintf(clk_name, sizeof(clk_name), "lcdc%d", pdev->id);
601 priv->clk = clk_get(&pdev->dev, clk_name);
602 if (IS_ERR(priv->clk)) {
603 dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
604 return PTR_ERR(priv->clk);
605 }
606
607 if (str) {
608 priv->dot_clk = clk_get(&pdev->dev, str);
609 if (IS_ERR(priv->dot_clk)) {
610 dev_err(&pdev->dev, "cannot get dot clock %s\n", str);
611 clk_put(priv->clk);
612 return PTR_ERR(priv->dot_clk);
613 }
614 }
615 #endif
616
617 return 0;
618 }
619
620 static int sh_mobile_lcdc_setcolreg(u_int regno,
621 u_int red, u_int green, u_int blue,
622 u_int transp, struct fb_info *info)
623 {
624 u32 *palette = info->pseudo_palette;
625
626 if (regno >= PALETTE_NR)
627 return -EINVAL;
628
629 /* only FB_VISUAL_TRUECOLOR supported */
630
631 red >>= 16 - info->var.red.length;
632 green >>= 16 - info->var.green.length;
633 blue >>= 16 - info->var.blue.length;
634 transp >>= 16 - info->var.transp.length;
635
636 palette[regno] = (red << info->var.red.offset) |
637 (green << info->var.green.offset) |
638 (blue << info->var.blue.offset) |
639 (transp << info->var.transp.offset);
640
641 return 0;
642 }
643
644 static struct fb_fix_screeninfo sh_mobile_lcdc_fix = {
645 .id = "SH Mobile LCDC",
646 .type = FB_TYPE_PACKED_PIXELS,
647 .visual = FB_VISUAL_TRUECOLOR,
648 .accel = FB_ACCEL_NONE,
649 };
650
651 static void sh_mobile_lcdc_fillrect(struct fb_info *info,
652 const struct fb_fillrect *rect)
653 {
654 sys_fillrect(info, rect);
655 sh_mobile_lcdc_deferred_io_touch(info);
656 }
657
658 static void sh_mobile_lcdc_copyarea(struct fb_info *info,
659 const struct fb_copyarea *area)
660 {
661 sys_copyarea(info, area);
662 sh_mobile_lcdc_deferred_io_touch(info);
663 }
664
665 static void sh_mobile_lcdc_imageblit(struct fb_info *info,
666 const struct fb_image *image)
667 {
668 sys_imageblit(info, image);
669 sh_mobile_lcdc_deferred_io_touch(info);
670 }
671
672 static struct fb_ops sh_mobile_lcdc_ops = {
673 .fb_setcolreg = sh_mobile_lcdc_setcolreg,
674 .fb_read = fb_sys_read,
675 .fb_write = fb_sys_write,
676 .fb_fillrect = sh_mobile_lcdc_fillrect,
677 .fb_copyarea = sh_mobile_lcdc_copyarea,
678 .fb_imageblit = sh_mobile_lcdc_imageblit,
679 };
680
681 static int sh_mobile_lcdc_set_bpp(struct fb_var_screeninfo *var, int bpp)
682 {
683 switch (bpp) {
684 case 16: /* PKF[4:0] = 00011 - RGB 565 */
685 var->red.offset = 11;
686 var->red.length = 5;
687 var->green.offset = 5;
688 var->green.length = 6;
689 var->blue.offset = 0;
690 var->blue.length = 5;
691 var->transp.offset = 0;
692 var->transp.length = 0;
693 break;
694
695 case 32: /* PKF[4:0] = 00000 - RGB 888
696 * sh7722 pdf says 00RRGGBB but reality is GGBB00RR
697 * this may be because LDDDSR has word swap enabled..
698 */
699 var->red.offset = 0;
700 var->red.length = 8;
701 var->green.offset = 24;
702 var->green.length = 8;
703 var->blue.offset = 16;
704 var->blue.length = 8;
705 var->transp.offset = 0;
706 var->transp.length = 0;
707 break;
708 default:
709 return -EINVAL;
710 }
711 var->bits_per_pixel = bpp;
712 var->red.msb_right = 0;
713 var->green.msb_right = 0;
714 var->blue.msb_right = 0;
715 var->transp.msb_right = 0;
716 return 0;
717 }
718
719 static int sh_mobile_lcdc_suspend(struct device *dev)
720 {
721 struct platform_device *pdev = to_platform_device(dev);
722
723 sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
724 return 0;
725 }
726
727 static int sh_mobile_lcdc_resume(struct device *dev)
728 {
729 struct platform_device *pdev = to_platform_device(dev);
730
731 return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
732 }
733
734 static struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
735 .suspend = sh_mobile_lcdc_suspend,
736 .resume = sh_mobile_lcdc_resume,
737 };
738
739 static int sh_mobile_lcdc_remove(struct platform_device *pdev);
740
741 static int __init sh_mobile_lcdc_probe(struct platform_device *pdev)
742 {
743 struct fb_info *info;
744 struct sh_mobile_lcdc_priv *priv;
745 struct sh_mobile_lcdc_info *pdata;
746 struct sh_mobile_lcdc_chan_cfg *cfg;
747 struct resource *res;
748 int error;
749 void *buf;
750 int i, j;
751
752 if (!pdev->dev.platform_data) {
753 dev_err(&pdev->dev, "no platform data defined\n");
754 error = -EINVAL;
755 goto err0;
756 }
757
758 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
759 i = platform_get_irq(pdev, 0);
760 if (!res || i < 0) {
761 dev_err(&pdev->dev, "cannot get platform resources\n");
762 error = -ENOENT;
763 goto err0;
764 }
765
766 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
767 if (!priv) {
768 dev_err(&pdev->dev, "cannot allocate device data\n");
769 error = -ENOMEM;
770 goto err0;
771 }
772
773 error = request_irq(i, sh_mobile_lcdc_irq, IRQF_DISABLED,
774 dev_name(&pdev->dev), priv);
775 if (error) {
776 dev_err(&pdev->dev, "unable to request irq\n");
777 goto err1;
778 }
779
780 priv->irq = i;
781 platform_set_drvdata(pdev, priv);
782 pdata = pdev->dev.platform_data;
783
784 j = 0;
785 for (i = 0; i < ARRAY_SIZE(pdata->ch); i++) {
786 priv->ch[j].lcdc = priv;
787 memcpy(&priv->ch[j].cfg, &pdata->ch[i], sizeof(pdata->ch[i]));
788
789 error = sh_mobile_lcdc_check_interface(&priv->ch[i]);
790 if (error) {
791 dev_err(&pdev->dev, "unsupported interface type\n");
792 goto err1;
793 }
794 init_waitqueue_head(&priv->ch[i].frame_end_wait);
795
796 switch (pdata->ch[i].chan) {
797 case LCDC_CHAN_MAINLCD:
798 priv->ch[j].enabled = 1 << 1;
799 priv->ch[j].reg_offs = lcdc_offs_mainlcd;
800 j++;
801 break;
802 case LCDC_CHAN_SUBLCD:
803 priv->ch[j].enabled = 1 << 2;
804 priv->ch[j].reg_offs = lcdc_offs_sublcd;
805 j++;
806 break;
807 }
808 }
809
810 if (!j) {
811 dev_err(&pdev->dev, "no channels defined\n");
812 error = -EINVAL;
813 goto err1;
814 }
815
816 error = sh_mobile_lcdc_setup_clocks(pdev, pdata->clock_source, priv);
817 if (error) {
818 dev_err(&pdev->dev, "unable to setup clocks\n");
819 goto err1;
820 }
821
822 priv->base = ioremap_nocache(res->start, (res->end - res->start) + 1);
823
824 for (i = 0; i < j; i++) {
825 cfg = &priv->ch[i].cfg;
826
827 priv->ch[i].info = framebuffer_alloc(0, &pdev->dev);
828 if (!priv->ch[i].info) {
829 dev_err(&pdev->dev, "unable to allocate fb_info\n");
830 error = -ENOMEM;
831 break;
832 }
833
834 info = priv->ch[i].info;
835 info->fbops = &sh_mobile_lcdc_ops;
836 info->var.xres = info->var.xres_virtual = cfg->lcd_cfg.xres;
837 info->var.yres = info->var.yres_virtual = cfg->lcd_cfg.yres;
838 info->var.width = cfg->lcd_size_cfg.width;
839 info->var.height = cfg->lcd_size_cfg.height;
840 info->var.activate = FB_ACTIVATE_NOW;
841 error = sh_mobile_lcdc_set_bpp(&info->var, cfg->bpp);
842 if (error)
843 break;
844
845 info->fix = sh_mobile_lcdc_fix;
846 info->fix.line_length = cfg->lcd_cfg.xres * (cfg->bpp / 8);
847 info->fix.smem_len = info->fix.line_length * cfg->lcd_cfg.yres;
848
849 buf = dma_alloc_coherent(&pdev->dev, info->fix.smem_len,
850 &priv->ch[i].dma_handle, GFP_KERNEL);
851 if (!buf) {
852 dev_err(&pdev->dev, "unable to allocate buffer\n");
853 error = -ENOMEM;
854 break;
855 }
856
857 info->pseudo_palette = &priv->ch[i].pseudo_palette;
858 info->flags = FBINFO_FLAG_DEFAULT;
859
860 error = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
861 if (error < 0) {
862 dev_err(&pdev->dev, "unable to allocate cmap\n");
863 dma_free_coherent(&pdev->dev, info->fix.smem_len,
864 buf, priv->ch[i].dma_handle);
865 break;
866 }
867
868 memset(buf, 0, info->fix.smem_len);
869 info->fix.smem_start = priv->ch[i].dma_handle;
870 info->screen_base = buf;
871 info->device = &pdev->dev;
872 info->par = &priv->ch[i];
873 }
874
875 if (error)
876 goto err1;
877
878 error = sh_mobile_lcdc_start(priv);
879 if (error) {
880 dev_err(&pdev->dev, "unable to start hardware\n");
881 goto err1;
882 }
883
884 for (i = 0; i < j; i++) {
885 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
886
887 info = ch->info;
888
889 if (info->fbdefio) {
890 priv->ch->sglist = vmalloc(sizeof(struct scatterlist) *
891 info->fix.smem_len >> PAGE_SHIFT);
892 if (!priv->ch->sglist) {
893 dev_err(&pdev->dev, "cannot allocate sglist\n");
894 goto err1;
895 }
896 }
897
898 error = register_framebuffer(info);
899 if (error < 0)
900 goto err1;
901
902 dev_info(info->dev,
903 "registered %s/%s as %dx%d %dbpp.\n",
904 pdev->name,
905 (ch->cfg.chan == LCDC_CHAN_MAINLCD) ?
906 "mainlcd" : "sublcd",
907 (int) ch->cfg.lcd_cfg.xres,
908 (int) ch->cfg.lcd_cfg.yres,
909 ch->cfg.bpp);
910
911 /* deferred io mode: disable clock to save power */
912 if (info->fbdefio)
913 sh_mobile_lcdc_clk_off(priv);
914 }
915
916 return 0;
917 err1:
918 sh_mobile_lcdc_remove(pdev);
919 err0:
920 return error;
921 }
922
923 static int sh_mobile_lcdc_remove(struct platform_device *pdev)
924 {
925 struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
926 struct fb_info *info;
927 int i;
928
929 for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
930 if (priv->ch[i].info->dev)
931 unregister_framebuffer(priv->ch[i].info);
932
933 sh_mobile_lcdc_stop(priv);
934
935 for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
936 info = priv->ch[i].info;
937
938 if (!info || !info->device)
939 continue;
940
941 if (priv->ch[i].sglist)
942 vfree(priv->ch[i].sglist);
943
944 dma_free_coherent(&pdev->dev, info->fix.smem_len,
945 info->screen_base, priv->ch[i].dma_handle);
946 fb_dealloc_cmap(&info->cmap);
947 framebuffer_release(info);
948 }
949
950 #ifdef CONFIG_HAVE_CLK
951 if (priv->dot_clk)
952 clk_put(priv->dot_clk);
953 clk_put(priv->clk);
954 #endif
955
956 if (priv->base)
957 iounmap(priv->base);
958
959 if (priv->irq)
960 free_irq(priv->irq, priv);
961 kfree(priv);
962 return 0;
963 }
964
965 static struct platform_driver sh_mobile_lcdc_driver = {
966 .driver = {
967 .name = "sh_mobile_lcdc_fb",
968 .owner = THIS_MODULE,
969 .pm = &sh_mobile_lcdc_dev_pm_ops,
970 },
971 .probe = sh_mobile_lcdc_probe,
972 .remove = sh_mobile_lcdc_remove,
973 };
974
975 static int __init sh_mobile_lcdc_init(void)
976 {
977 return platform_driver_register(&sh_mobile_lcdc_driver);
978 }
979
980 static void __exit sh_mobile_lcdc_exit(void)
981 {
982 platform_driver_unregister(&sh_mobile_lcdc_driver);
983 }
984
985 module_init(sh_mobile_lcdc_init);
986 module_exit(sh_mobile_lcdc_exit);
987
988 MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
989 MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
990 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support