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drm/radeon/kms: improve aux error handling
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / video / sh_mobile_lcdcfb.c
blob9bcc61b4ef149a258e6159a9728ffebac2bd5daf
1 /*
2 * SuperH Mobile LCDC Framebuffer
3 *
4 * Copyright (c) 2008 Magnus Damm
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file "COPYING" in the main directory of this archive
8 * for more details.
9 */
10
11 #include <linux/kernel.h>
12 #include <linux/init.h>
13 #include <linux/delay.h>
14 #include <linux/mm.h>
15 #include <linux/clk.h>
16 #include <linux/pm_runtime.h>
17 #include <linux/platform_device.h>
18 #include <linux/dma-mapping.h>
19 #include <linux/interrupt.h>
20 #include <linux/vmalloc.h>
21 #include <linux/ioctl.h>
22 #include <linux/slab.h>
23 #include <linux/console.h>
24 #include <linux/backlight.h>
25 #include <linux/gpio.h>
26 #include <video/sh_mobile_lcdc.h>
27 #include <asm/atomic.h>
28
29 #include "sh_mobile_lcdcfb.h"
30
31 #define SIDE_B_OFFSET 0x1000
32 #define MIRROR_OFFSET 0x2000
33
34 /* shared registers */
35 #define _LDDCKR 0x410
36 #define _LDDCKSTPR 0x414
37 #define _LDINTR 0x468
38 #define _LDSR 0x46c
39 #define _LDCNT1R 0x470
40 #define _LDCNT2R 0x474
41 #define _LDRCNTR 0x478
42 #define _LDDDSR 0x47c
43 #define _LDDWD0R 0x800
44 #define _LDDRDR 0x840
45 #define _LDDWAR 0x900
46 #define _LDDRAR 0x904
47
48 /* shared registers and their order for context save/restore */
49 static int lcdc_shared_regs[] = {
50 _LDDCKR,
51 _LDDCKSTPR,
52 _LDINTR,
53 _LDDDSR,
54 _LDCNT1R,
55 _LDCNT2R,
56 };
57 #define NR_SHARED_REGS ARRAY_SIZE(lcdc_shared_regs)
58
59 #define MAX_XRES 1920
60 #define MAX_YRES 1080
61
62 static unsigned long lcdc_offs_mainlcd[NR_CH_REGS] = {
63 [LDDCKPAT1R] = 0x400,
64 [LDDCKPAT2R] = 0x404,
65 [LDMT1R] = 0x418,
66 [LDMT2R] = 0x41c,
67 [LDMT3R] = 0x420,
68 [LDDFR] = 0x424,
69 [LDSM1R] = 0x428,
70 [LDSM2R] = 0x42c,
71 [LDSA1R] = 0x430,
72 [LDSA2R] = 0x434,
73 [LDMLSR] = 0x438,
74 [LDHCNR] = 0x448,
75 [LDHSYNR] = 0x44c,
76 [LDVLNR] = 0x450,
77 [LDVSYNR] = 0x454,
78 [LDPMR] = 0x460,
79 [LDHAJR] = 0x4a0,
80 };
81
82 static unsigned long lcdc_offs_sublcd[NR_CH_REGS] = {
83 [LDDCKPAT1R] = 0x408,
84 [LDDCKPAT2R] = 0x40c,
85 [LDMT1R] = 0x600,
86 [LDMT2R] = 0x604,
87 [LDMT3R] = 0x608,
88 [LDDFR] = 0x60c,
89 [LDSM1R] = 0x610,
90 [LDSM2R] = 0x614,
91 [LDSA1R] = 0x618,
92 [LDMLSR] = 0x620,
93 [LDHCNR] = 0x624,
94 [LDHSYNR] = 0x628,
95 [LDVLNR] = 0x62c,
96 [LDVSYNR] = 0x630,
97 [LDPMR] = 0x63c,
98 };
99
100 #define START_LCDC 0x00000001
101 #define LCDC_RESET 0x00000100
102 #define DISPLAY_BEU 0x00000008
103 #define LCDC_ENABLE 0x00000001
104 #define LDINTR_FE 0x00000400
105 #define LDINTR_VSE 0x00000200
106 #define LDINTR_VEE 0x00000100
107 #define LDINTR_FS 0x00000004
108 #define LDINTR_VSS 0x00000002
109 #define LDINTR_VES 0x00000001
110 #define LDRCNTR_SRS 0x00020000
111 #define LDRCNTR_SRC 0x00010000
112 #define LDRCNTR_MRS 0x00000002
113 #define LDRCNTR_MRC 0x00000001
114 #define LDSR_MRS 0x00000100
115
116 static const struct fb_videomode default_720p = {
117 .name = "HDMI 720p",
118 .xres = 1280,
119 .yres = 720,
120
121 .left_margin = 220,
122 .right_margin = 110,
123 .hsync_len = 40,
124
125 .upper_margin = 20,
126 .lower_margin = 5,
127 .vsync_len = 5,
128
129 .pixclock = 13468,
130 .refresh = 60,
131 .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT,
132 };
133
134 struct sh_mobile_lcdc_priv {
135 void __iomem *base;
136 int irq;
137 atomic_t hw_usecnt;
138 struct device *dev;
139 struct clk *dot_clk;
140 unsigned long lddckr;
141 struct sh_mobile_lcdc_chan ch[2];
142 struct notifier_block notifier;
143 unsigned long saved_shared_regs[NR_SHARED_REGS];
144 int started;
145 int forced_bpp; /* 2 channel LCDC must share bpp setting */
146 };
147
148 static bool banked(int reg_nr)
149 {
150 switch (reg_nr) {
151 case LDMT1R:
152 case LDMT2R:
153 case LDMT3R:
154 case LDDFR:
155 case LDSM1R:
156 case LDSA1R:
157 case LDSA2R:
158 case LDMLSR:
159 case LDHCNR:
160 case LDHSYNR:
161 case LDVLNR:
162 case LDVSYNR:
163 return true;
164 }
165 return false;
166 }
167
168 static void lcdc_write_chan(struct sh_mobile_lcdc_chan *chan,
169 int reg_nr, unsigned long data)
170 {
171 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr]);
172 if (banked(reg_nr))
173 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
174 SIDE_B_OFFSET);
175 }
176
177 static void lcdc_write_chan_mirror(struct sh_mobile_lcdc_chan *chan,
178 int reg_nr, unsigned long data)
179 {
180 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
181 MIRROR_OFFSET);
182 }
183
184 static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan *chan,
185 int reg_nr)
186 {
187 return ioread32(chan->lcdc->base + chan->reg_offs[reg_nr]);
188 }
189
190 static void lcdc_write(struct sh_mobile_lcdc_priv *priv,
191 unsigned long reg_offs, unsigned long data)
192 {
193 iowrite32(data, priv->base + reg_offs);
194 }
195
196 static unsigned long lcdc_read(struct sh_mobile_lcdc_priv *priv,
197 unsigned long reg_offs)
198 {
199 return ioread32(priv->base + reg_offs);
200 }
201
202 static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv,
203 unsigned long reg_offs,
204 unsigned long mask, unsigned long until)
205 {
206 while ((lcdc_read(priv, reg_offs) & mask) != until)
207 cpu_relax();
208 }
209
210 static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan)
211 {
212 return chan->cfg.chan == LCDC_CHAN_SUBLCD;
213 }
214
215 static void lcdc_sys_write_index(void *handle, unsigned long data)
216 {
217 struct sh_mobile_lcdc_chan *ch = handle;
218
219 lcdc_write(ch->lcdc, _LDDWD0R, data | 0x10000000);
220 lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
221 lcdc_write(ch->lcdc, _LDDWAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
222 lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
223 }
224
225 static void lcdc_sys_write_data(void *handle, unsigned long data)
226 {
227 struct sh_mobile_lcdc_chan *ch = handle;
228
229 lcdc_write(ch->lcdc, _LDDWD0R, data | 0x11000000);
230 lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
231 lcdc_write(ch->lcdc, _LDDWAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
232 lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
233 }
234
235 static unsigned long lcdc_sys_read_data(void *handle)
236 {
237 struct sh_mobile_lcdc_chan *ch = handle;
238
239 lcdc_write(ch->lcdc, _LDDRDR, 0x01000000);
240 lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
241 lcdc_write(ch->lcdc, _LDDRAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
242 udelay(1);
243 lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
244
245 return lcdc_read(ch->lcdc, _LDDRDR) & 0x3ffff;
246 }
247
248 struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = {
249 lcdc_sys_write_index,
250 lcdc_sys_write_data,
251 lcdc_sys_read_data,
252 };
253
254 static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv)
255 {
256 if (atomic_inc_and_test(&priv->hw_usecnt)) {
257 pm_runtime_get_sync(priv->dev);
258 if (priv->dot_clk)
259 clk_enable(priv->dot_clk);
260 }
261 }
262
263 static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv)
264 {
265 if (atomic_sub_return(1, &priv->hw_usecnt) == -1) {
266 if (priv->dot_clk)
267 clk_disable(priv->dot_clk);
268 pm_runtime_put(priv->dev);
269 }
270 }
271
272 static int sh_mobile_lcdc_sginit(struct fb_info *info,
273 struct list_head *pagelist)
274 {
275 struct sh_mobile_lcdc_chan *ch = info->par;
276 unsigned int nr_pages_max = info->fix.smem_len >> PAGE_SHIFT;
277 struct page *page;
278 int nr_pages = 0;
279
280 sg_init_table(ch->sglist, nr_pages_max);
281
282 list_for_each_entry(page, pagelist, lru)
283 sg_set_page(&ch->sglist[nr_pages++], page, PAGE_SIZE, 0);
284
285 return nr_pages;
286 }
287
288 static void sh_mobile_lcdc_deferred_io(struct fb_info *info,
289 struct list_head *pagelist)
290 {
291 struct sh_mobile_lcdc_chan *ch = info->par;
292 struct sh_mobile_lcdc_board_cfg *bcfg = &ch->cfg.board_cfg;
293
294 /* enable clocks before accessing hardware */
295 sh_mobile_lcdc_clk_on(ch->lcdc);
296
297 /*
298 * It's possible to get here without anything on the pagelist via
299 * sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync()
300 * invocation. In the former case, the acceleration routines are
301 * stepped in to when using the framebuffer console causing the
302 * workqueue to be scheduled without any dirty pages on the list.
303 *
304 * Despite this, a panel update is still needed given that the
305 * acceleration routines have their own methods for writing in
306 * that still need to be updated.
307 *
308 * The fsync() and empty pagelist case could be optimized for,
309 * but we don't bother, as any application exhibiting such
310 * behaviour is fundamentally broken anyways.
311 */
312 if (!list_empty(pagelist)) {
313 unsigned int nr_pages = sh_mobile_lcdc_sginit(info, pagelist);
314
315 /* trigger panel update */
316 dma_map_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
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 dma_unmap_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
322 } else {
323 if (bcfg->start_transfer)
324 bcfg->start_transfer(bcfg->board_data, ch,
325 &sh_mobile_lcdc_sys_bus_ops);
326 lcdc_write_chan(ch, LDSM2R, 1);
327 }
328 }
329
330 static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info)
331 {
332 struct fb_deferred_io *fbdefio = info->fbdefio;
333
334 if (fbdefio)
335 schedule_delayed_work(&info->deferred_work, fbdefio->delay);
336 }
337
338 static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
339 {
340 struct sh_mobile_lcdc_priv *priv = data;
341 struct sh_mobile_lcdc_chan *ch;
342 unsigned long tmp;
343 unsigned long ldintr;
344 int is_sub;
345 int k;
346
347 /* acknowledge interrupt */
348 ldintr = tmp = lcdc_read(priv, _LDINTR);
349 /*
350 * disable further VSYNC End IRQs, preserve all other enabled IRQs,
351 * write 0 to bits 0-6 to ack all triggered IRQs.
352 */
353 tmp &= 0xffffff00 & ~LDINTR_VEE;
354 lcdc_write(priv, _LDINTR, tmp);
355
356 /* figure out if this interrupt is for main or sub lcd */
357 is_sub = (lcdc_read(priv, _LDSR) & (1 << 10)) ? 1 : 0;
358
359 /* wake up channel and disable clocks */
360 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
361 ch = &priv->ch[k];
362
363 if (!ch->enabled)
364 continue;
365
366 /* Frame Start */
367 if (ldintr & LDINTR_FS) {
368 if (is_sub == lcdc_chan_is_sublcd(ch)) {
369 ch->frame_end = 1;
370 wake_up(&ch->frame_end_wait);
371
372 sh_mobile_lcdc_clk_off(priv);
373 }
374 }
375
376 /* VSYNC End */
377 if (ldintr & LDINTR_VES)
378 complete(&ch->vsync_completion);
379 }
380
381 return IRQ_HANDLED;
382 }
383
384 static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv,
385 int start)
386 {
387 unsigned long tmp = lcdc_read(priv, _LDCNT2R);
388 int k;
389
390 /* start or stop the lcdc */
391 if (start)
392 lcdc_write(priv, _LDCNT2R, tmp | START_LCDC);
393 else
394 lcdc_write(priv, _LDCNT2R, tmp & ~START_LCDC);
395
396 /* wait until power is applied/stopped on all channels */
397 for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
398 if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled)
399 while (1) {
400 tmp = lcdc_read_chan(&priv->ch[k], LDPMR) & 3;
401 if (start && tmp == 3)
402 break;
403 if (!start && tmp == 0)
404 break;
405 cpu_relax();
406 }
407
408 if (!start)
409 lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */
410 }
411
412 static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch)
413 {
414 struct fb_var_screeninfo *var = &ch->info->var, *display_var = &ch->display_var;
415 unsigned long h_total, hsync_pos, display_h_total;
416 u32 tmp;
417
418 tmp = ch->ldmt1r_value;
419 tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : 1 << 28;
420 tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : 1 << 27;
421 tmp |= (ch->cfg.flags & LCDC_FLAGS_DWPOL) ? 1 << 26 : 0;
422 tmp |= (ch->cfg.flags & LCDC_FLAGS_DIPOL) ? 1 << 25 : 0;
423 tmp |= (ch->cfg.flags & LCDC_FLAGS_DAPOL) ? 1 << 24 : 0;
424 tmp |= (ch->cfg.flags & LCDC_FLAGS_HSCNT) ? 1 << 17 : 0;
425 tmp |= (ch->cfg.flags & LCDC_FLAGS_DWCNT) ? 1 << 16 : 0;
426 lcdc_write_chan(ch, LDMT1R, tmp);
427
428 /* setup SYS bus */
429 lcdc_write_chan(ch, LDMT2R, ch->cfg.sys_bus_cfg.ldmt2r);
430 lcdc_write_chan(ch, LDMT3R, ch->cfg.sys_bus_cfg.ldmt3r);
431
432 /* horizontal configuration */
433 h_total = display_var->xres + display_var->hsync_len +
434 display_var->left_margin + display_var->right_margin;
435 tmp = h_total / 8; /* HTCN */
436 tmp |= (min(display_var->xres, var->xres) / 8) << 16; /* HDCN */
437 lcdc_write_chan(ch, LDHCNR, tmp);
438
439 hsync_pos = display_var->xres + display_var->right_margin;
440 tmp = hsync_pos / 8; /* HSYNP */
441 tmp |= (display_var->hsync_len / 8) << 16; /* HSYNW */
442 lcdc_write_chan(ch, LDHSYNR, tmp);
443
444 /* vertical configuration */
445 tmp = display_var->yres + display_var->vsync_len +
446 display_var->upper_margin + display_var->lower_margin; /* VTLN */
447 tmp |= min(display_var->yres, var->yres) << 16; /* VDLN */
448 lcdc_write_chan(ch, LDVLNR, tmp);
449
450 tmp = display_var->yres + display_var->lower_margin; /* VSYNP */
451 tmp |= display_var->vsync_len << 16; /* VSYNW */
452 lcdc_write_chan(ch, LDVSYNR, tmp);
453
454 /* Adjust horizontal synchronisation for HDMI */
455 display_h_total = display_var->xres + display_var->hsync_len +
456 display_var->left_margin + display_var->right_margin;
457 tmp = ((display_var->xres & 7) << 24) |
458 ((display_h_total & 7) << 16) |
459 ((display_var->hsync_len & 7) << 8) |
460 hsync_pos;
461 lcdc_write_chan(ch, LDHAJR, tmp);
462 }
463
464 static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
465 {
466 struct sh_mobile_lcdc_chan *ch;
467 struct sh_mobile_lcdc_board_cfg *board_cfg;
468 unsigned long tmp;
469 int bpp = 0;
470 unsigned long ldddsr;
471 int k, m;
472 int ret = 0;
473
474 /* enable clocks before accessing the hardware */
475 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
476 if (priv->ch[k].enabled) {
477 sh_mobile_lcdc_clk_on(priv);
478 if (!bpp)
479 bpp = priv->ch[k].info->var.bits_per_pixel;
480 }
481 }
482
483 /* reset */
484 lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LCDC_RESET);
485 lcdc_wait_bit(priv, _LDCNT2R, LCDC_RESET, 0);
486
487 /* enable LCDC channels */
488 tmp = lcdc_read(priv, _LDCNT2R);
489 tmp |= priv->ch[0].enabled;
490 tmp |= priv->ch[1].enabled;
491 lcdc_write(priv, _LDCNT2R, tmp);
492
493 /* read data from external memory, avoid using the BEU for now */
494 lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) & ~DISPLAY_BEU);
495
496 /* stop the lcdc first */
497 sh_mobile_lcdc_start_stop(priv, 0);
498
499 /* configure clocks */
500 tmp = priv->lddckr;
501 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
502 ch = &priv->ch[k];
503
504 if (!priv->ch[k].enabled)
505 continue;
506
507 m = ch->cfg.clock_divider;
508 if (!m)
509 continue;
510
511 if (m == 1)
512 m = 1 << 6;
513 tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
514
515 /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider denominator */
516 lcdc_write_chan(ch, LDDCKPAT1R, 0);
517 lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1);
518 }
519
520 lcdc_write(priv, _LDDCKR, tmp);
521
522 /* start dotclock again */
523 lcdc_write(priv, _LDDCKSTPR, 0);
524 lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0);
525
526 /* interrupts are disabled to begin with */
527 lcdc_write(priv, _LDINTR, 0);
528
529 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
530 ch = &priv->ch[k];
531
532 if (!ch->enabled)
533 continue;
534
535 sh_mobile_lcdc_geometry(ch);
536
537 /* power supply */
538 lcdc_write_chan(ch, LDPMR, 0);
539
540 board_cfg = &ch->cfg.board_cfg;
541 if (board_cfg->setup_sys)
542 ret = board_cfg->setup_sys(board_cfg->board_data, ch,
543 &sh_mobile_lcdc_sys_bus_ops);
544 if (ret)
545 return ret;
546 }
547
548 /* word and long word swap */
549 ldddsr = lcdc_read(priv, _LDDDSR);
550 if (priv->ch[0].info->var.nonstd)
551 lcdc_write(priv, _LDDDSR, ldddsr | 7);
552 else {
553 switch (bpp) {
554 case 16:
555 lcdc_write(priv, _LDDDSR, ldddsr | 6);
556 break;
557 case 24:
558 lcdc_write(priv, _LDDDSR, ldddsr | 7);
559 break;
560 case 32:
561 lcdc_write(priv, _LDDDSR, ldddsr | 4);
562 break;
563 }
564 }
565
566 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
567 ch = &priv->ch[k];
568
569 if (!priv->ch[k].enabled)
570 continue;
571
572 /* set bpp format in PKF[4:0] */
573 tmp = lcdc_read_chan(ch, LDDFR);
574 tmp &= ~0x0003031f;
575 if (ch->info->var.nonstd) {
576 tmp |= (ch->info->var.nonstd << 16);
577 switch (ch->info->var.bits_per_pixel) {
578 case 12:
579 break;
580 case 16:
581 tmp |= (0x1 << 8);
582 break;
583 case 24:
584 tmp |= (0x2 << 8);
585 break;
586 }
587 } else {
588 switch (ch->info->var.bits_per_pixel) {
589 case 16:
590 tmp |= 0x03;
591 break;
592 case 24:
593 tmp |= 0x0b;
594 break;
595 case 32:
596 break;
597 }
598 }
599 lcdc_write_chan(ch, LDDFR, tmp);
600
601 /* point out our frame buffer */
602 lcdc_write_chan(ch, LDSA1R, ch->info->fix.smem_start);
603 if (ch->info->var.nonstd)
604 lcdc_write_chan(ch, LDSA2R,
605 ch->info->fix.smem_start +
606 ch->info->var.xres *
607 ch->info->var.yres_virtual);
608
609 /* set line size */
610 lcdc_write_chan(ch, LDMLSR, ch->info->fix.line_length);
611
612 /* setup deferred io if SYS bus */
613 tmp = ch->cfg.sys_bus_cfg.deferred_io_msec;
614 if (ch->ldmt1r_value & (1 << 12) && tmp) {
615 ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
616 ch->defio.delay = msecs_to_jiffies(tmp);
617 ch->info->fbdefio = &ch->defio;
618 fb_deferred_io_init(ch->info);
619
620 /* one-shot mode */
621 lcdc_write_chan(ch, LDSM1R, 1);
622
623 /* enable "Frame End Interrupt Enable" bit */
624 lcdc_write(priv, _LDINTR, LDINTR_FE);
625
626 } else {
627 /* continuous read mode */
628 lcdc_write_chan(ch, LDSM1R, 0);
629 }
630 }
631
632 /* display output */
633 lcdc_write(priv, _LDCNT1R, LCDC_ENABLE);
634
635 /* start the lcdc */
636 sh_mobile_lcdc_start_stop(priv, 1);
637 priv->started = 1;
638
639 /* tell the board code to enable the panel */
640 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
641 ch = &priv->ch[k];
642 if (!ch->enabled)
643 continue;
644
645 board_cfg = &ch->cfg.board_cfg;
646 if (board_cfg->display_on && try_module_get(board_cfg->owner)) {
647 board_cfg->display_on(board_cfg->board_data, ch->info);
648 module_put(board_cfg->owner);
649 }
650
651 if (ch->bl) {
652 ch->bl->props.power = FB_BLANK_UNBLANK;
653 backlight_update_status(ch->bl);
654 }
655 }
656
657 return 0;
658 }
659
660 static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
661 {
662 struct sh_mobile_lcdc_chan *ch;
663 struct sh_mobile_lcdc_board_cfg *board_cfg;
664 int k;
665
666 /* clean up deferred io and ask board code to disable panel */
667 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
668 ch = &priv->ch[k];
669 if (!ch->enabled)
670 continue;
671
672 /* deferred io mode:
673 * flush frame, and wait for frame end interrupt
674 * clean up deferred io and enable clock
675 */
676 if (ch->info && ch->info->fbdefio) {
677 ch->frame_end = 0;
678 schedule_delayed_work(&ch->info->deferred_work, 0);
679 wait_event(ch->frame_end_wait, ch->frame_end);
680 fb_deferred_io_cleanup(ch->info);
681 ch->info->fbdefio = NULL;
682 sh_mobile_lcdc_clk_on(priv);
683 }
684
685 if (ch->bl) {
686 ch->bl->props.power = FB_BLANK_POWERDOWN;
687 backlight_update_status(ch->bl);
688 }
689
690 board_cfg = &ch->cfg.board_cfg;
691 if (board_cfg->display_off && try_module_get(board_cfg->owner)) {
692 board_cfg->display_off(board_cfg->board_data);
693 module_put(board_cfg->owner);
694 }
695 }
696
697 /* stop the lcdc */
698 if (priv->started) {
699 sh_mobile_lcdc_start_stop(priv, 0);
700 priv->started = 0;
701 }
702
703 /* stop clocks */
704 for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
705 if (priv->ch[k].enabled)
706 sh_mobile_lcdc_clk_off(priv);
707 }
708
709 static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
710 {
711 int ifm, miftyp;
712
713 switch (ch->cfg.interface_type) {
714 case RGB8: ifm = 0; miftyp = 0; break;
715 case RGB9: ifm = 0; miftyp = 4; break;
716 case RGB12A: ifm = 0; miftyp = 5; break;
717 case RGB12B: ifm = 0; miftyp = 6; break;
718 case RGB16: ifm = 0; miftyp = 7; break;
719 case RGB18: ifm = 0; miftyp = 10; break;
720 case RGB24: ifm = 0; miftyp = 11; break;
721 case SYS8A: ifm = 1; miftyp = 0; break;
722 case SYS8B: ifm = 1; miftyp = 1; break;
723 case SYS8C: ifm = 1; miftyp = 2; break;
724 case SYS8D: ifm = 1; miftyp = 3; break;
725 case SYS9: ifm = 1; miftyp = 4; break;
726 case SYS12: ifm = 1; miftyp = 5; break;
727 case SYS16A: ifm = 1; miftyp = 7; break;
728 case SYS16B: ifm = 1; miftyp = 8; break;
729 case SYS16C: ifm = 1; miftyp = 9; break;
730 case SYS18: ifm = 1; miftyp = 10; break;
731 case SYS24: ifm = 1; miftyp = 11; break;
732 default: goto bad;
733 }
734
735 /* SUBLCD only supports SYS interface */
736 if (lcdc_chan_is_sublcd(ch)) {
737 if (ifm == 0)
738 goto bad;
739 else
740 ifm = 0;
741 }
742
743 ch->ldmt1r_value = (ifm << 12) | miftyp;
744 return 0;
745 bad:
746 return -EINVAL;
747 }
748
749 static int sh_mobile_lcdc_setup_clocks(struct platform_device *pdev,
750 int clock_source,
751 struct sh_mobile_lcdc_priv *priv)
752 {
753 char *str;
754 int icksel;
755
756 switch (clock_source) {
757 case LCDC_CLK_BUS: str = "bus_clk"; icksel = 0; break;
758 case LCDC_CLK_PERIPHERAL: str = "peripheral_clk"; icksel = 1; break;
759 case LCDC_CLK_EXTERNAL: str = NULL; icksel = 2; break;
760 default:
761 return -EINVAL;
762 }
763
764 priv->lddckr = icksel << 16;
765
766 if (str) {
767 priv->dot_clk = clk_get(&pdev->dev, str);
768 if (IS_ERR(priv->dot_clk)) {
769 dev_err(&pdev->dev, "cannot get dot clock %s\n", str);
770 return PTR_ERR(priv->dot_clk);
771 }
772 }
773
774 /* Runtime PM support involves two step for this driver:
775 * 1) Enable Runtime PM
776 * 2) Force Runtime PM Resume since hardware is accessed from probe()
777 */
778 priv->dev = &pdev->dev;
779 pm_runtime_enable(priv->dev);
780 pm_runtime_resume(priv->dev);
781 return 0;
782 }
783
784 static int sh_mobile_lcdc_setcolreg(u_int regno,
785 u_int red, u_int green, u_int blue,
786 u_int transp, struct fb_info *info)
787 {
788 u32 *palette = info->pseudo_palette;
789
790 if (regno >= PALETTE_NR)
791 return -EINVAL;
792
793 /* only FB_VISUAL_TRUECOLOR supported */
794
795 red >>= 16 - info->var.red.length;
796 green >>= 16 - info->var.green.length;
797 blue >>= 16 - info->var.blue.length;
798 transp >>= 16 - info->var.transp.length;
799
800 palette[regno] = (red << info->var.red.offset) |
801 (green << info->var.green.offset) |
802 (blue << info->var.blue.offset) |
803 (transp << info->var.transp.offset);
804
805 return 0;
806 }
807
808 static struct fb_fix_screeninfo sh_mobile_lcdc_fix = {
809 .id = "SH Mobile LCDC",
810 .type = FB_TYPE_PACKED_PIXELS,
811 .visual = FB_VISUAL_TRUECOLOR,
812 .accel = FB_ACCEL_NONE,
813 .xpanstep = 0,
814 .ypanstep = 1,
815 .ywrapstep = 0,
816 };
817
818 static void sh_mobile_lcdc_fillrect(struct fb_info *info,
819 const struct fb_fillrect *rect)
820 {
821 sys_fillrect(info, rect);
822 sh_mobile_lcdc_deferred_io_touch(info);
823 }
824
825 static void sh_mobile_lcdc_copyarea(struct fb_info *info,
826 const struct fb_copyarea *area)
827 {
828 sys_copyarea(info, area);
829 sh_mobile_lcdc_deferred_io_touch(info);
830 }
831
832 static void sh_mobile_lcdc_imageblit(struct fb_info *info,
833 const struct fb_image *image)
834 {
835 sys_imageblit(info, image);
836 sh_mobile_lcdc_deferred_io_touch(info);
837 }
838
839 static int sh_mobile_fb_pan_display(struct fb_var_screeninfo *var,
840 struct fb_info *info)
841 {
842 struct sh_mobile_lcdc_chan *ch = info->par;
843 struct sh_mobile_lcdc_priv *priv = ch->lcdc;
844 unsigned long ldrcntr;
845 unsigned long new_pan_offset;
846 unsigned long base_addr_y, base_addr_c;
847 unsigned long c_offset;
848
849 if (!var->nonstd)
850 new_pan_offset = (var->yoffset * info->fix.line_length) +
851 (var->xoffset * (info->var.bits_per_pixel / 8));
852 else
853 new_pan_offset = (var->yoffset * info->fix.line_length) +
854 (var->xoffset);
855
856 if (new_pan_offset == ch->pan_offset)
857 return 0; /* No change, do nothing */
858
859 ldrcntr = lcdc_read(priv, _LDRCNTR);
860
861 /* Set the source address for the next refresh */
862 base_addr_y = ch->dma_handle + new_pan_offset;
863 if (var->nonstd) {
864 /* Set y offset */
865 c_offset = (var->yoffset *
866 info->fix.line_length *
867 (info->var.bits_per_pixel - 8)) / 8;
868 base_addr_c = ch->dma_handle + var->xres * var->yres_virtual +
869 c_offset;
870 /* Set x offset */
871 if (info->var.bits_per_pixel == 24)
872 base_addr_c += 2 * var->xoffset;
873 else
874 base_addr_c += var->xoffset;
875 } else
876 base_addr_c = 0;
877
878 lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y);
879 if (base_addr_c)
880 lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c);
881
882 if (lcdc_chan_is_sublcd(ch))
883 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
884 else
885 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS);
886
887 ch->pan_offset = new_pan_offset;
888
889 sh_mobile_lcdc_deferred_io_touch(info);
890
891 return 0;
892 }
893
894 static int sh_mobile_wait_for_vsync(struct fb_info *info)
895 {
896 struct sh_mobile_lcdc_chan *ch = info->par;
897 unsigned long ldintr;
898 int ret;
899
900 /* Enable VSync End interrupt */
901 ldintr = lcdc_read(ch->lcdc, _LDINTR);
902 ldintr |= LDINTR_VEE;
903 lcdc_write(ch->lcdc, _LDINTR, ldintr);
904
905 ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion,
906 msecs_to_jiffies(100));
907 if (!ret)
908 return -ETIMEDOUT;
909
910 return 0;
911 }
912
913 static int sh_mobile_ioctl(struct fb_info *info, unsigned int cmd,
914 unsigned long arg)
915 {
916 int retval;
917
918 switch (cmd) {
919 case FBIO_WAITFORVSYNC:
920 retval = sh_mobile_wait_for_vsync(info);
921 break;
922
923 default:
924 retval = -ENOIOCTLCMD;
925 break;
926 }
927 return retval;
928 }
929
930 static void sh_mobile_fb_reconfig(struct fb_info *info)
931 {
932 struct sh_mobile_lcdc_chan *ch = info->par;
933 struct fb_videomode mode1, mode2;
934 struct fb_event event;
935 int evnt = FB_EVENT_MODE_CHANGE_ALL;
936
937 if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par))
938 /* More framebuffer users are active */
939 return;
940
941 fb_var_to_videomode(&mode1, &ch->display_var);
942 fb_var_to_videomode(&mode2, &info->var);
943
944 if (fb_mode_is_equal(&mode1, &mode2))
945 return;
946
947 /* Display has been re-plugged, framebuffer is free now, reconfigure */
948 if (fb_set_var(info, &ch->display_var) < 0)
949 /* Couldn't reconfigure, hopefully, can continue as before */
950 return;
951
952 if (info->var.nonstd)
953 info->fix.line_length = mode1.xres;
954 else
955 info->fix.line_length = mode1.xres * (ch->cfg.bpp / 8);
956
957 /*
958 * fb_set_var() calls the notifier change internally, only if
959 * FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a
960 * user event, we have to call the chain ourselves.
961 */
962 event.info = info;
963 event.data = &mode1;
964 fb_notifier_call_chain(evnt, &event);
965 }
966
967 /*
968 * Locking: both .fb_release() and .fb_open() are called with info->lock held if
969 * user == 1, or with console sem held, if user == 0.
970 */
971 static int sh_mobile_release(struct fb_info *info, int user)
972 {
973 struct sh_mobile_lcdc_chan *ch = info->par;
974
975 mutex_lock(&ch->open_lock);
976 dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
977
978 ch->use_count--;
979
980 /* Nothing to reconfigure, when called from fbcon */
981 if (user) {
982 console_lock();
983 sh_mobile_fb_reconfig(info);
984 console_unlock();
985 }
986
987 mutex_unlock(&ch->open_lock);
988
989 return 0;
990 }
991
992 static int sh_mobile_open(struct fb_info *info, int user)
993 {
994 struct sh_mobile_lcdc_chan *ch = info->par;
995
996 mutex_lock(&ch->open_lock);
997 ch->use_count++;
998
999 dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1000 mutex_unlock(&ch->open_lock);
1001
1002 return 0;
1003 }
1004
1005 static int sh_mobile_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
1006 {
1007 struct sh_mobile_lcdc_chan *ch = info->par;
1008 struct sh_mobile_lcdc_priv *p = ch->lcdc;
1009
1010 if (var->xres > MAX_XRES || var->yres > MAX_YRES ||
1011 var->xres * var->yres * (ch->cfg.bpp / 8) * 2 > info->fix.smem_len) {
1012 dev_warn(info->dev, "Invalid info: %u-%u-%u-%u x %u-%u-%u-%u @ %lukHz!\n",
1013 var->left_margin, var->xres, var->right_margin, var->hsync_len,
1014 var->upper_margin, var->yres, var->lower_margin, var->vsync_len,
1015 PICOS2KHZ(var->pixclock));
1016 return -EINVAL;
1017 }
1018
1019 /* only accept the forced_bpp for dual channel configurations */
1020 if (p->forced_bpp && p->forced_bpp != var->bits_per_pixel)
1021 return -EINVAL;
1022
1023 switch (var->bits_per_pixel) {
1024 case 16: /* PKF[4:0] = 00011 - RGB 565 */
1025 case 24: /* PKF[4:0] = 01011 - RGB 888 */
1026 case 32: /* PKF[4:0] = 00000 - RGBA 888 */
1027 break;
1028 default:
1029 return -EINVAL;
1030 }
1031
1032 return 0;
1033 }
1034
1035 /*
1036 * Screen blanking. Behavior is as follows:
1037 * FB_BLANK_UNBLANK: screen unblanked, clocks enabled
1038 * FB_BLANK_NORMAL: screen blanked, clocks enabled
1039 * FB_BLANK_VSYNC,
1040 * FB_BLANK_HSYNC,
1041 * FB_BLANK_POWEROFF: screen blanked, clocks disabled
1042 */
1043 static int sh_mobile_lcdc_blank(int blank, struct fb_info *info)
1044 {
1045 struct sh_mobile_lcdc_chan *ch = info->par;
1046 struct sh_mobile_lcdc_priv *p = ch->lcdc;
1047
1048 /* blank the screen? */
1049 if (blank > FB_BLANK_UNBLANK && ch->blank_status == FB_BLANK_UNBLANK) {
1050 struct fb_fillrect rect = {
1051 .width = info->var.xres,
1052 .height = info->var.yres,
1053 };
1054 sh_mobile_lcdc_fillrect(info, &rect);
1055 }
1056 /* turn clocks on? */
1057 if (blank <= FB_BLANK_NORMAL && ch->blank_status > FB_BLANK_NORMAL) {
1058 sh_mobile_lcdc_clk_on(p);
1059 }
1060 /* turn clocks off? */
1061 if (blank > FB_BLANK_NORMAL && ch->blank_status <= FB_BLANK_NORMAL) {
1062 /* make sure the screen is updated with the black fill before
1063 * switching the clocks off. one vsync is not enough since
1064 * blanking may occur in the middle of a refresh. deferred io
1065 * mode will reenable the clocks and update the screen in time,
1066 * so it does not need this. */
1067 if (!info->fbdefio) {
1068 sh_mobile_wait_for_vsync(info);
1069 sh_mobile_wait_for_vsync(info);
1070 }
1071 sh_mobile_lcdc_clk_off(p);
1072 }
1073
1074 ch->blank_status = blank;
1075 return 0;
1076 }
1077
1078 static struct fb_ops sh_mobile_lcdc_ops = {
1079 .owner = THIS_MODULE,
1080 .fb_setcolreg = sh_mobile_lcdc_setcolreg,
1081 .fb_read = fb_sys_read,
1082 .fb_write = fb_sys_write,
1083 .fb_fillrect = sh_mobile_lcdc_fillrect,
1084 .fb_copyarea = sh_mobile_lcdc_copyarea,
1085 .fb_imageblit = sh_mobile_lcdc_imageblit,
1086 .fb_blank = sh_mobile_lcdc_blank,
1087 .fb_pan_display = sh_mobile_fb_pan_display,
1088 .fb_ioctl = sh_mobile_ioctl,
1089 .fb_open = sh_mobile_open,
1090 .fb_release = sh_mobile_release,
1091 .fb_check_var = sh_mobile_check_var,
1092 };
1093
1094 static int sh_mobile_lcdc_update_bl(struct backlight_device *bdev)
1095 {
1096 struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
1097 struct sh_mobile_lcdc_board_cfg *cfg = &ch->cfg.board_cfg;
1098 int brightness = bdev->props.brightness;
1099
1100 if (bdev->props.power != FB_BLANK_UNBLANK ||
1101 bdev->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
1102 brightness = 0;
1103
1104 return cfg->set_brightness(cfg->board_data, brightness);
1105 }
1106
1107 static int sh_mobile_lcdc_get_brightness(struct backlight_device *bdev)
1108 {
1109 struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
1110 struct sh_mobile_lcdc_board_cfg *cfg = &ch->cfg.board_cfg;
1111
1112 return cfg->get_brightness(cfg->board_data);
1113 }
1114
1115 static int sh_mobile_lcdc_check_fb(struct backlight_device *bdev,
1116 struct fb_info *info)
1117 {
1118 return (info->bl_dev == bdev);
1119 }
1120
1121 static struct backlight_ops sh_mobile_lcdc_bl_ops = {
1122 .options = BL_CORE_SUSPENDRESUME,
1123 .update_status = sh_mobile_lcdc_update_bl,
1124 .get_brightness = sh_mobile_lcdc_get_brightness,
1125 .check_fb = sh_mobile_lcdc_check_fb,
1126 };
1127
1128 static struct backlight_device *sh_mobile_lcdc_bl_probe(struct device *parent,
1129 struct sh_mobile_lcdc_chan *ch)
1130 {
1131 struct backlight_device *bl;
1132
1133 bl = backlight_device_register(ch->cfg.bl_info.name, parent, ch,
1134 &sh_mobile_lcdc_bl_ops, NULL);
1135 if (IS_ERR(bl)) {
1136 dev_err(parent, "unable to register backlight device: %ld\n",
1137 PTR_ERR(bl));
1138 return NULL;
1139 }
1140
1141 bl->props.max_brightness = ch->cfg.bl_info.max_brightness;
1142 bl->props.brightness = bl->props.max_brightness;
1143 backlight_update_status(bl);
1144
1145 return bl;
1146 }
1147
1148 static void sh_mobile_lcdc_bl_remove(struct backlight_device *bdev)
1149 {
1150 backlight_device_unregister(bdev);
1151 }
1152
1153 static int sh_mobile_lcdc_set_bpp(struct fb_var_screeninfo *var, int bpp,
1154 int nonstd)
1155 {
1156 if (nonstd) {
1157 switch (bpp) {
1158 case 12:
1159 case 16:
1160 case 24:
1161 var->bits_per_pixel = bpp;
1162 var->nonstd = nonstd;
1163 return 0;
1164 default:
1165 return -EINVAL;
1166 }
1167 }
1168
1169 switch (bpp) {
1170 case 16: /* PKF[4:0] = 00011 - RGB 565 */
1171 var->red.offset = 11;
1172 var->red.length = 5;
1173 var->green.offset = 5;
1174 var->green.length = 6;
1175 var->blue.offset = 0;
1176 var->blue.length = 5;
1177 var->transp.offset = 0;
1178 var->transp.length = 0;
1179 break;
1180
1181 case 24: /* PKF[4:0] = 01011 - RGB 888 */
1182 var->red.offset = 16;
1183 var->red.length = 8;
1184 var->green.offset = 8;
1185 var->green.length = 8;
1186 var->blue.offset = 0;
1187 var->blue.length = 8;
1188 var->transp.offset = 0;
1189 var->transp.length = 0;
1190 break;
1191
1192 case 32: /* PKF[4:0] = 00000 - RGBA 888 */
1193 var->red.offset = 16;
1194 var->red.length = 8;
1195 var->green.offset = 8;
1196 var->green.length = 8;
1197 var->blue.offset = 0;
1198 var->blue.length = 8;
1199 var->transp.offset = 24;
1200 var->transp.length = 8;
1201 break;
1202 default:
1203 return -EINVAL;
1204 }
1205 var->bits_per_pixel = bpp;
1206 var->red.msb_right = 0;
1207 var->green.msb_right = 0;
1208 var->blue.msb_right = 0;
1209 var->transp.msb_right = 0;
1210 return 0;
1211 }
1212
1213 static int sh_mobile_lcdc_suspend(struct device *dev)
1214 {
1215 struct platform_device *pdev = to_platform_device(dev);
1216
1217 sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
1218 return 0;
1219 }
1220
1221 static int sh_mobile_lcdc_resume(struct device *dev)
1222 {
1223 struct platform_device *pdev = to_platform_device(dev);
1224
1225 return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
1226 }
1227
1228 static int sh_mobile_lcdc_runtime_suspend(struct device *dev)
1229 {
1230 struct platform_device *pdev = to_platform_device(dev);
1231 struct sh_mobile_lcdc_priv *p = platform_get_drvdata(pdev);
1232 struct sh_mobile_lcdc_chan *ch;
1233 int k, n;
1234
1235 /* save per-channel registers */
1236 for (k = 0; k < ARRAY_SIZE(p->ch); k++) {
1237 ch = &p->ch[k];
1238 if (!ch->enabled)
1239 continue;
1240 for (n = 0; n < NR_CH_REGS; n++)
1241 ch->saved_ch_regs[n] = lcdc_read_chan(ch, n);
1242 }
1243
1244 /* save shared registers */
1245 for (n = 0; n < NR_SHARED_REGS; n++)
1246 p->saved_shared_regs[n] = lcdc_read(p, lcdc_shared_regs[n]);
1247
1248 /* turn off LCDC hardware */
1249 lcdc_write(p, _LDCNT1R, 0);
1250 return 0;
1251 }
1252
1253 static int sh_mobile_lcdc_runtime_resume(struct device *dev)
1254 {
1255 struct platform_device *pdev = to_platform_device(dev);
1256 struct sh_mobile_lcdc_priv *p = platform_get_drvdata(pdev);
1257 struct sh_mobile_lcdc_chan *ch;
1258 int k, n;
1259
1260 /* restore per-channel registers */
1261 for (k = 0; k < ARRAY_SIZE(p->ch); k++) {
1262 ch = &p->ch[k];
1263 if (!ch->enabled)
1264 continue;
1265 for (n = 0; n < NR_CH_REGS; n++)
1266 lcdc_write_chan(ch, n, ch->saved_ch_regs[n]);
1267 }
1268
1269 /* restore shared registers */
1270 for (n = 0; n < NR_SHARED_REGS; n++)
1271 lcdc_write(p, lcdc_shared_regs[n], p->saved_shared_regs[n]);
1272
1273 return 0;
1274 }
1275
1276 static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
1277 .suspend = sh_mobile_lcdc_suspend,
1278 .resume = sh_mobile_lcdc_resume,
1279 .runtime_suspend = sh_mobile_lcdc_runtime_suspend,
1280 .runtime_resume = sh_mobile_lcdc_runtime_resume,
1281 };
1282
1283 /* locking: called with info->lock held */
1284 static int sh_mobile_lcdc_notify(struct notifier_block *nb,
1285 unsigned long action, void *data)
1286 {
1287 struct fb_event *event = data;
1288 struct fb_info *info = event->info;
1289 struct sh_mobile_lcdc_chan *ch = info->par;
1290 struct sh_mobile_lcdc_board_cfg *board_cfg = &ch->cfg.board_cfg;
1291 int ret;
1292
1293 if (&ch->lcdc->notifier != nb)
1294 return NOTIFY_DONE;
1295
1296 dev_dbg(info->dev, "%s(): action = %lu, data = %p\n",
1297 __func__, action, event->data);
1298
1299 switch(action) {
1300 case FB_EVENT_SUSPEND:
1301 if (board_cfg->display_off && try_module_get(board_cfg->owner)) {
1302 board_cfg->display_off(board_cfg->board_data);
1303 module_put(board_cfg->owner);
1304 }
1305 pm_runtime_put(info->device);
1306 sh_mobile_lcdc_stop(ch->lcdc);
1307 break;
1308 case FB_EVENT_RESUME:
1309 mutex_lock(&ch->open_lock);
1310 sh_mobile_fb_reconfig(info);
1311 mutex_unlock(&ch->open_lock);
1312
1313 /* HDMI must be enabled before LCDC configuration */
1314 if (board_cfg->display_on && try_module_get(board_cfg->owner)) {
1315 board_cfg->display_on(board_cfg->board_data, info);
1316 module_put(board_cfg->owner);
1317 }
1318
1319 ret = sh_mobile_lcdc_start(ch->lcdc);
1320 if (!ret)
1321 pm_runtime_get_sync(info->device);
1322 }
1323
1324 return NOTIFY_OK;
1325 }
1326
1327 static int sh_mobile_lcdc_remove(struct platform_device *pdev);
1328
1329 static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev)
1330 {
1331 struct fb_info *info;
1332 struct sh_mobile_lcdc_priv *priv;
1333 struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data;
1334 struct resource *res;
1335 int error;
1336 void *buf;
1337 int i, j;
1338
1339 if (!pdata) {
1340 dev_err(&pdev->dev, "no platform data defined\n");
1341 return -EINVAL;
1342 }
1343
1344 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1345 i = platform_get_irq(pdev, 0);
1346 if (!res || i < 0) {
1347 dev_err(&pdev->dev, "cannot get platform resources\n");
1348 return -ENOENT;
1349 }
1350
1351 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
1352 if (!priv) {
1353 dev_err(&pdev->dev, "cannot allocate device data\n");
1354 return -ENOMEM;
1355 }
1356
1357 platform_set_drvdata(pdev, priv);
1358
1359 error = request_irq(i, sh_mobile_lcdc_irq, IRQF_DISABLED,
1360 dev_name(&pdev->dev), priv);
1361 if (error) {
1362 dev_err(&pdev->dev, "unable to request irq\n");
1363 goto err1;
1364 }
1365
1366 priv->irq = i;
1367 atomic_set(&priv->hw_usecnt, -1);
1368
1369 j = 0;
1370 for (i = 0; i < ARRAY_SIZE(pdata->ch); i++) {
1371 struct sh_mobile_lcdc_chan *ch = priv->ch + j;
1372
1373 ch->lcdc = priv;
1374 memcpy(&ch->cfg, &pdata->ch[i], sizeof(pdata->ch[i]));
1375
1376 error = sh_mobile_lcdc_check_interface(ch);
1377 if (error) {
1378 dev_err(&pdev->dev, "unsupported interface type\n");
1379 goto err1;
1380 }
1381 init_waitqueue_head(&ch->frame_end_wait);
1382 init_completion(&ch->vsync_completion);
1383 ch->pan_offset = 0;
1384
1385 /* probe the backlight is there is one defined */
1386 if (ch->cfg.bl_info.max_brightness)
1387 ch->bl = sh_mobile_lcdc_bl_probe(&pdev->dev, ch);
1388
1389 switch (pdata->ch[i].chan) {
1390 case LCDC_CHAN_MAINLCD:
1391 ch->enabled = 1 << 1;
1392 ch->reg_offs = lcdc_offs_mainlcd;
1393 j++;
1394 break;
1395 case LCDC_CHAN_SUBLCD:
1396 ch->enabled = 1 << 2;
1397 ch->reg_offs = lcdc_offs_sublcd;
1398 j++;
1399 break;
1400 }
1401 }
1402
1403 if (!j) {
1404 dev_err(&pdev->dev, "no channels defined\n");
1405 error = -EINVAL;
1406 goto err1;
1407 }
1408
1409 /* for dual channel LCDC (MAIN + SUB) force shared bpp setting */
1410 if (j == 2)
1411 priv->forced_bpp = pdata->ch[0].bpp;
1412
1413 priv->base = ioremap_nocache(res->start, resource_size(res));
1414 if (!priv->base)
1415 goto err1;
1416
1417 error = sh_mobile_lcdc_setup_clocks(pdev, pdata->clock_source, priv);
1418 if (error) {
1419 dev_err(&pdev->dev, "unable to setup clocks\n");
1420 goto err1;
1421 }
1422
1423 for (i = 0; i < j; i++) {
1424 struct fb_var_screeninfo *var;
1425 const struct fb_videomode *lcd_cfg, *max_cfg = NULL;
1426 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
1427 struct sh_mobile_lcdc_chan_cfg *cfg = &ch->cfg;
1428 const struct fb_videomode *mode = cfg->lcd_cfg;
1429 unsigned long max_size = 0;
1430 int k;
1431 int num_cfg;
1432
1433 ch->info = framebuffer_alloc(0, &pdev->dev);
1434 if (!ch->info) {
1435 dev_err(&pdev->dev, "unable to allocate fb_info\n");
1436 error = -ENOMEM;
1437 break;
1438 }
1439
1440 info = ch->info;
1441 var = &info->var;
1442 info->fbops = &sh_mobile_lcdc_ops;
1443 info->par = ch;
1444
1445 mutex_init(&ch->open_lock);
1446
1447 for (k = 0, lcd_cfg = mode;
1448 k < cfg->num_cfg && lcd_cfg;
1449 k++, lcd_cfg++) {
1450 unsigned long size = lcd_cfg->yres * lcd_cfg->xres;
1451 /* NV12 buffers must have even number of lines */
1452 if ((cfg->nonstd) && cfg->bpp == 12 &&
1453 (lcd_cfg->yres & 0x1)) {
1454 dev_err(&pdev->dev, "yres must be multiple of 2"
1455 " for YCbCr420 mode.\n");
1456 error = -EINVAL;
1457 goto err1;
1458 }
1459
1460 if (size > max_size) {
1461 max_cfg = lcd_cfg;
1462 max_size = size;
1463 }
1464 }
1465
1466 if (!mode)
1467 max_size = MAX_XRES * MAX_YRES;
1468 else if (max_cfg)
1469 dev_dbg(&pdev->dev, "Found largest videomode %ux%u\n",
1470 max_cfg->xres, max_cfg->yres);
1471
1472 info->fix = sh_mobile_lcdc_fix;
1473 info->fix.smem_len = max_size * 2 * cfg->bpp / 8;
1474
1475 /* Only pan in 2 line steps for NV12 */
1476 if (cfg->nonstd && cfg->bpp == 12)
1477 info->fix.ypanstep = 2;
1478
1479 if (!mode) {
1480 mode = &default_720p;
1481 num_cfg = 1;
1482 } else {
1483 num_cfg = cfg->num_cfg;
1484 }
1485
1486 fb_videomode_to_modelist(mode, num_cfg, &info->modelist);
1487
1488 fb_videomode_to_var(var, mode);
1489 var->width = cfg->lcd_size_cfg.width;
1490 var->height = cfg->lcd_size_cfg.height;
1491 /* Default Y virtual resolution is 2x panel size */
1492 var->yres_virtual = var->yres * 2;
1493 var->activate = FB_ACTIVATE_NOW;
1494
1495 error = sh_mobile_lcdc_set_bpp(var, cfg->bpp, cfg->nonstd);
1496 if (error)
1497 break;
1498
1499 buf = dma_alloc_coherent(&pdev->dev, info->fix.smem_len,
1500 &ch->dma_handle, GFP_KERNEL);
1501 if (!buf) {
1502 dev_err(&pdev->dev, "unable to allocate buffer\n");
1503 error = -ENOMEM;
1504 break;
1505 }
1506
1507 info->pseudo_palette = &ch->pseudo_palette;
1508 info->flags = FBINFO_FLAG_DEFAULT;
1509
1510 error = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
1511 if (error < 0) {
1512 dev_err(&pdev->dev, "unable to allocate cmap\n");
1513 dma_free_coherent(&pdev->dev, info->fix.smem_len,
1514 buf, ch->dma_handle);
1515 break;
1516 }
1517
1518 info->fix.smem_start = ch->dma_handle;
1519 if (var->nonstd)
1520 info->fix.line_length = var->xres;
1521 else
1522 info->fix.line_length = var->xres * (cfg->bpp / 8);
1523
1524 info->screen_base = buf;
1525 info->device = &pdev->dev;
1526 ch->display_var = *var;
1527 }
1528
1529 if (error)
1530 goto err1;
1531
1532 error = sh_mobile_lcdc_start(priv);
1533 if (error) {
1534 dev_err(&pdev->dev, "unable to start hardware\n");
1535 goto err1;
1536 }
1537
1538 for (i = 0; i < j; i++) {
1539 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
1540
1541 info = ch->info;
1542
1543 if (info->fbdefio) {
1544 ch->sglist = vmalloc(sizeof(struct scatterlist) *
1545 info->fix.smem_len >> PAGE_SHIFT);
1546 if (!ch->sglist) {
1547 dev_err(&pdev->dev, "cannot allocate sglist\n");
1548 goto err1;
1549 }
1550 }
1551
1552 info->bl_dev = ch->bl;
1553
1554 error = register_framebuffer(info);
1555 if (error < 0)
1556 goto err1;
1557
1558 dev_info(info->dev,
1559 "registered %s/%s as %dx%d %dbpp.\n",
1560 pdev->name,
1561 (ch->cfg.chan == LCDC_CHAN_MAINLCD) ?
1562 "mainlcd" : "sublcd",
1563 info->var.xres, info->var.yres,
1564 ch->cfg.bpp);
1565
1566 /* deferred io mode: disable clock to save power */
1567 if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED)
1568 sh_mobile_lcdc_clk_off(priv);
1569 }
1570
1571 /* Failure ignored */
1572 priv->notifier.notifier_call = sh_mobile_lcdc_notify;
1573 fb_register_client(&priv->notifier);
1574
1575 return 0;
1576 err1:
1577 sh_mobile_lcdc_remove(pdev);
1578
1579 return error;
1580 }
1581
1582 static int sh_mobile_lcdc_remove(struct platform_device *pdev)
1583 {
1584 struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
1585 struct fb_info *info;
1586 int i;
1587
1588 fb_unregister_client(&priv->notifier);
1589
1590 for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
1591 if (priv->ch[i].info && priv->ch[i].info->dev)
1592 unregister_framebuffer(priv->ch[i].info);
1593
1594 sh_mobile_lcdc_stop(priv);
1595
1596 for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
1597 info = priv->ch[i].info;
1598
1599 if (!info || !info->device)
1600 continue;
1601
1602 if (priv->ch[i].sglist)
1603 vfree(priv->ch[i].sglist);
1604
1605 if (info->screen_base)
1606 dma_free_coherent(&pdev->dev, info->fix.smem_len,
1607 info->screen_base,
1608 priv->ch[i].dma_handle);
1609 fb_dealloc_cmap(&info->cmap);
1610 framebuffer_release(info);
1611 }
1612
1613 for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
1614 if (priv->ch[i].bl)
1615 sh_mobile_lcdc_bl_remove(priv->ch[i].bl);
1616 }
1617
1618 if (priv->dot_clk)
1619 clk_put(priv->dot_clk);
1620
1621 if (priv->dev)
1622 pm_runtime_disable(priv->dev);
1623
1624 if (priv->base)
1625 iounmap(priv->base);
1626
1627 if (priv->irq)
1628 free_irq(priv->irq, priv);
1629 kfree(priv);
1630 return 0;
1631 }
1632
1633 static struct platform_driver sh_mobile_lcdc_driver = {
1634 .driver = {
1635 .name = "sh_mobile_lcdc_fb",
1636 .owner = THIS_MODULE,
1637 .pm = &sh_mobile_lcdc_dev_pm_ops,
1638 },
1639 .probe = sh_mobile_lcdc_probe,
1640 .remove = sh_mobile_lcdc_remove,
1641 };
1642
1643 static int __init sh_mobile_lcdc_init(void)
1644 {
1645 return platform_driver_register(&sh_mobile_lcdc_driver);
1646 }
1647
1648 static void __exit sh_mobile_lcdc_exit(void)
1649 {
1650 platform_driver_unregister(&sh_mobile_lcdc_driver);
1651 }
1652
1653 module_init(sh_mobile_lcdc_init);
1654 module_exit(sh_mobile_lcdc_exit);
1655
1656 MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
1657 MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
1658 MODULE_LICENSE("GPL v2");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree