2 * SuperH Mobile LCDC Framebuffer
4 * Copyright (c) 2008 Magnus Damm
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
11 #include <linux/kernel.h>
12 #include <linux/init.h>
13 #include <linux/delay.h>
16 #include <linux/clk.h>
17 #include <linux/pm_runtime.h>
18 #include <linux/platform_device.h>
19 #include <linux/dma-mapping.h>
20 #include <linux/interrupt.h>
21 #include <linux/vmalloc.h>
22 #include <linux/ioctl.h>
23 #include <linux/slab.h>
24 #include <video/sh_mobile_lcdc.h>
25 #include <asm/atomic.h>
28 #define SIDE_B_OFFSET 0x1000
29 #define MIRROR_OFFSET 0x2000
31 /* shared registers */
33 #define _LDDCKSTPR 0x414
36 #define _LDCNT1R 0x470
37 #define _LDCNT2R 0x474
38 #define _LDRCNTR 0x478
40 #define _LDDWD0R 0x800
45 /* shared registers and their order for context save/restore */
46 static int lcdc_shared_regs[] = {
54 #define NR_SHARED_REGS ARRAY_SIZE(lcdc_shared_regs)
56 /* per-channel registers */
57 enum { LDDCKPAT1R, LDDCKPAT2R, LDMT1R, LDMT2R, LDMT3R, LDDFR, LDSM1R,
58 LDSM2R, LDSA1R, LDMLSR, LDHCNR, LDHSYNR, LDVLNR, LDVSYNR, LDPMR,
62 static unsigned long lcdc_offs_mainlcd[NR_CH_REGS] = {
81 static unsigned long lcdc_offs_sublcd[NR_CH_REGS] = {
99 #define START_LCDC 0x00000001
100 #define LCDC_RESET 0x00000100
101 #define DISPLAY_BEU 0x00000008
102 #define LCDC_ENABLE 0x00000001
103 #define LDINTR_FE 0x00000400
104 #define LDINTR_VSE 0x00000200
105 #define LDINTR_VEE 0x00000100
106 #define LDINTR_FS 0x00000004
107 #define LDINTR_VSS 0x00000002
108 #define LDINTR_VES 0x00000001
109 #define LDRCNTR_SRS 0x00020000
110 #define LDRCNTR_SRC 0x00010000
111 #define LDRCNTR_MRS 0x00000002
112 #define LDRCNTR_MRC 0x00000001
113 #define LDSR_MRS 0x00000100
115 struct sh_mobile_lcdc_priv;
116 struct sh_mobile_lcdc_chan {
117 struct sh_mobile_lcdc_priv *lcdc;
118 unsigned long *reg_offs;
119 unsigned long ldmt1r_value;
120 unsigned long enabled; /* ME and SE in LDCNT2R */
121 struct sh_mobile_lcdc_chan_cfg cfg;
122 u32 pseudo_palette[PALETTE_NR];
123 unsigned long saved_ch_regs[NR_CH_REGS];
124 struct fb_info *info;
125 dma_addr_t dma_handle;
126 struct fb_deferred_io defio;
127 struct scatterlist *sglist;
128 unsigned long frame_end;
129 unsigned long pan_offset;
130 wait_queue_head_t frame_end_wait;
131 struct completion vsync_completion;
134 struct sh_mobile_lcdc_priv {
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];
147 static bool banked(int reg_nr)
166 static void lcdc_write_chan(struct sh_mobile_lcdc_chan *chan,
167 int reg_nr, unsigned long data)
169 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr]);
171 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
175 static void lcdc_write_chan_mirror(struct sh_mobile_lcdc_chan *chan,
176 int reg_nr, unsigned long data)
178 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
182 static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan *chan,
185 return ioread32(chan->lcdc->base + chan->reg_offs[reg_nr]);
188 static void lcdc_write(struct sh_mobile_lcdc_priv *priv,
189 unsigned long reg_offs, unsigned long data)
191 iowrite32(data, priv->base + reg_offs);
194 static unsigned long lcdc_read(struct sh_mobile_lcdc_priv *priv,
195 unsigned long reg_offs)
197 return ioread32(priv->base + reg_offs);
200 static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv,
201 unsigned long reg_offs,
202 unsigned long mask, unsigned long until)
204 while ((lcdc_read(priv, reg_offs) & mask) != until)
208 static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan)
210 return chan->cfg.chan == LCDC_CHAN_SUBLCD;
213 static void lcdc_sys_write_index(void *handle, unsigned long data)
215 struct sh_mobile_lcdc_chan *ch = handle;
217 lcdc_write(ch->lcdc, _LDDWD0R, data | 0x10000000);
218 lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
219 lcdc_write(ch->lcdc, _LDDWAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
220 lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
223 static void lcdc_sys_write_data(void *handle, unsigned long data)
225 struct sh_mobile_lcdc_chan *ch = handle;
227 lcdc_write(ch->lcdc, _LDDWD0R, data | 0x11000000);
228 lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
229 lcdc_write(ch->lcdc, _LDDWAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
230 lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
233 static unsigned long lcdc_sys_read_data(void *handle)
235 struct sh_mobile_lcdc_chan *ch = handle;
237 lcdc_write(ch->lcdc, _LDDRDR, 0x01000000);
238 lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
239 lcdc_write(ch->lcdc, _LDDRAR, 1 | (lcdc_chan_is_sublcd(ch) ? 2 : 0));
241 lcdc_wait_bit(ch->lcdc, _LDSR, 2, 0);
243 return lcdc_read(ch->lcdc, _LDDRDR) & 0x3ffff;
246 struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = {
247 lcdc_sys_write_index,
252 static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv)
254 if (atomic_inc_and_test(&priv->hw_usecnt)) {
255 pm_runtime_get_sync(priv->dev);
257 clk_enable(priv->dot_clk);
261 static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv)
263 if (atomic_sub_return(1, &priv->hw_usecnt) == -1) {
265 clk_disable(priv->dot_clk);
266 pm_runtime_put(priv->dev);
270 static int sh_mobile_lcdc_sginit(struct fb_info *info,
271 struct list_head *pagelist)
273 struct sh_mobile_lcdc_chan *ch = info->par;
274 unsigned int nr_pages_max = info->fix.smem_len >> PAGE_SHIFT;
278 sg_init_table(ch->sglist, nr_pages_max);
280 list_for_each_entry(page, pagelist, lru)
281 sg_set_page(&ch->sglist[nr_pages++], page, PAGE_SIZE, 0);
286 static void sh_mobile_lcdc_deferred_io(struct fb_info *info,
287 struct list_head *pagelist)
289 struct sh_mobile_lcdc_chan *ch = info->par;
290 struct sh_mobile_lcdc_board_cfg *bcfg = &ch->cfg.board_cfg;
292 /* enable clocks before accessing hardware */
293 sh_mobile_lcdc_clk_on(ch->lcdc);
296 * It's possible to get here without anything on the pagelist via
297 * sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync()
298 * invocation. In the former case, the acceleration routines are
299 * stepped in to when using the framebuffer console causing the
300 * workqueue to be scheduled without any dirty pages on the list.
302 * Despite this, a panel update is still needed given that the
303 * acceleration routines have their own methods for writing in
304 * that still need to be updated.
306 * The fsync() and empty pagelist case could be optimized for,
307 * but we don't bother, as any application exhibiting such
308 * behaviour is fundamentally broken anyways.
310 if (!list_empty(pagelist)) {
311 unsigned int nr_pages = sh_mobile_lcdc_sginit(info, pagelist);
313 /* trigger panel update */
314 dma_map_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
315 if (bcfg->start_transfer)
316 bcfg->start_transfer(bcfg->board_data, ch,
317 &sh_mobile_lcdc_sys_bus_ops);
318 lcdc_write_chan(ch, LDSM2R, 1);
319 dma_unmap_sg(info->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
321 if (bcfg->start_transfer)
322 bcfg->start_transfer(bcfg->board_data, ch,
323 &sh_mobile_lcdc_sys_bus_ops);
324 lcdc_write_chan(ch, LDSM2R, 1);
328 static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info)
330 struct fb_deferred_io *fbdefio = info->fbdefio;
333 schedule_delayed_work(&info->deferred_work, fbdefio->delay);
336 static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
338 struct sh_mobile_lcdc_priv *priv = data;
339 struct sh_mobile_lcdc_chan *ch;
341 unsigned long ldintr;
345 /* acknowledge interrupt */
346 ldintr = tmp = lcdc_read(priv, _LDINTR);
348 * disable further VSYNC End IRQs, preserve all other enabled IRQs,
349 * write 0 to bits 0-6 to ack all triggered IRQs.
351 tmp &= 0xffffff00 & ~LDINTR_VEE;
352 lcdc_write(priv, _LDINTR, tmp);
354 /* figure out if this interrupt is for main or sub lcd */
355 is_sub = (lcdc_read(priv, _LDSR) & (1 << 10)) ? 1 : 0;
357 /* wake up channel and disable clocks */
358 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
365 if (ldintr & LDINTR_FS) {
366 if (is_sub == lcdc_chan_is_sublcd(ch)) {
368 wake_up(&ch->frame_end_wait);
370 sh_mobile_lcdc_clk_off(priv);
375 if (ldintr & LDINTR_VES)
376 complete(&ch->vsync_completion);
382 static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv,
385 unsigned long tmp = lcdc_read(priv, _LDCNT2R);
388 /* start or stop the lcdc */
390 lcdc_write(priv, _LDCNT2R, tmp | START_LCDC);
392 lcdc_write(priv, _LDCNT2R, tmp & ~START_LCDC);
394 /* wait until power is applied/stopped on all channels */
395 for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
396 if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled)
398 tmp = lcdc_read_chan(&priv->ch[k], LDPMR) & 3;
399 if (start && tmp == 3)
401 if (!start && tmp == 0)
407 lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */
410 static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch)
412 struct fb_var_screeninfo *var = &ch->info->var;
413 unsigned long h_total, hsync_pos;
416 tmp = ch->ldmt1r_value;
417 tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : 1 << 28;
418 tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : 1 << 27;
419 tmp |= (ch->cfg.flags & LCDC_FLAGS_DWPOL) ? 1 << 26 : 0;
420 tmp |= (ch->cfg.flags & LCDC_FLAGS_DIPOL) ? 1 << 25 : 0;
421 tmp |= (ch->cfg.flags & LCDC_FLAGS_DAPOL) ? 1 << 24 : 0;
422 tmp |= (ch->cfg.flags & LCDC_FLAGS_HSCNT) ? 1 << 17 : 0;
423 tmp |= (ch->cfg.flags & LCDC_FLAGS_DWCNT) ? 1 << 16 : 0;
424 lcdc_write_chan(ch, LDMT1R, tmp);
427 lcdc_write_chan(ch, LDMT2R, ch->cfg.sys_bus_cfg.ldmt2r);
428 lcdc_write_chan(ch, LDMT3R, ch->cfg.sys_bus_cfg.ldmt3r);
430 /* horizontal configuration */
431 h_total = var->xres + var->hsync_len +
432 var->left_margin + var->right_margin;
433 tmp = h_total / 8; /* HTCN */
434 tmp |= (var->xres / 8) << 16; /* HDCN */
435 lcdc_write_chan(ch, LDHCNR, tmp);
437 hsync_pos = var->xres + var->right_margin;
438 tmp = hsync_pos / 8; /* HSYNP */
439 tmp |= (var->hsync_len / 8) << 16; /* HSYNW */
440 lcdc_write_chan(ch, LDHSYNR, tmp);
442 /* vertical configuration */
443 tmp = var->yres + var->vsync_len +
444 var->upper_margin + var->lower_margin; /* VTLN */
445 tmp |= var->yres << 16; /* VDLN */
446 lcdc_write_chan(ch, LDVLNR, tmp);
448 tmp = var->yres + var->lower_margin; /* VSYNP */
449 tmp |= var->vsync_len << 16; /* VSYNW */
450 lcdc_write_chan(ch, LDVSYNR, tmp);
452 /* Adjust horizontal synchronisation for HDMI */
453 tmp = ((var->xres & 7) << 24) |
454 ((h_total & 7) << 16) |
455 ((var->hsync_len & 7) << 8) |
457 lcdc_write_chan(ch, LDHAJR, tmp);
460 static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
462 struct sh_mobile_lcdc_chan *ch;
463 struct sh_mobile_lcdc_board_cfg *board_cfg;
468 /* enable clocks before accessing the hardware */
469 for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
470 if (priv->ch[k].enabled)
471 sh_mobile_lcdc_clk_on(priv);
474 lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LCDC_RESET);
475 lcdc_wait_bit(priv, _LDCNT2R, LCDC_RESET, 0);
477 /* enable LCDC channels */
478 tmp = lcdc_read(priv, _LDCNT2R);
479 tmp |= priv->ch[0].enabled;
480 tmp |= priv->ch[1].enabled;
481 lcdc_write(priv, _LDCNT2R, tmp);
483 /* read data from external memory, avoid using the BEU for now */
484 lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) & ~DISPLAY_BEU);
486 /* stop the lcdc first */
487 sh_mobile_lcdc_start_stop(priv, 0);
489 /* configure clocks */
491 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
494 if (!priv->ch[k].enabled)
497 m = ch->cfg.clock_divider;
503 tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
505 lcdc_write_chan(ch, LDDCKPAT1R, 0x00000000);
506 lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1);
509 lcdc_write(priv, _LDDCKR, tmp);
511 /* start dotclock again */
512 lcdc_write(priv, _LDDCKSTPR, 0);
513 lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0);
515 /* interrupts are disabled to begin with */
516 lcdc_write(priv, _LDINTR, 0);
518 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
524 sh_mobile_lcdc_geometry(ch);
527 lcdc_write_chan(ch, LDPMR, 0);
529 board_cfg = &ch->cfg.board_cfg;
530 if (board_cfg->setup_sys)
531 ret = board_cfg->setup_sys(board_cfg->board_data, ch,
532 &sh_mobile_lcdc_sys_bus_ops);
537 /* word and long word swap */
538 lcdc_write(priv, _LDDDSR, lcdc_read(priv, _LDDDSR) | 6);
540 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
543 if (!priv->ch[k].enabled)
546 /* set bpp format in PKF[4:0] */
547 tmp = lcdc_read_chan(ch, LDDFR);
548 tmp &= ~(0x0001001f);
549 tmp |= (ch->info->var.bits_per_pixel == 16) ? 3 : 0;
550 lcdc_write_chan(ch, LDDFR, tmp);
552 /* point out our frame buffer */
553 lcdc_write_chan(ch, LDSA1R, ch->info->fix.smem_start);
556 lcdc_write_chan(ch, LDMLSR, ch->info->fix.line_length);
558 /* setup deferred io if SYS bus */
559 tmp = ch->cfg.sys_bus_cfg.deferred_io_msec;
560 if (ch->ldmt1r_value & (1 << 12) && tmp) {
561 ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
562 ch->defio.delay = msecs_to_jiffies(tmp);
563 ch->info->fbdefio = &ch->defio;
564 fb_deferred_io_init(ch->info);
567 lcdc_write_chan(ch, LDSM1R, 1);
569 /* enable "Frame End Interrupt Enable" bit */
570 lcdc_write(priv, _LDINTR, LDINTR_FE);
573 /* continuous read mode */
574 lcdc_write_chan(ch, LDSM1R, 0);
579 lcdc_write(priv, _LDCNT1R, LCDC_ENABLE);
582 sh_mobile_lcdc_start_stop(priv, 1);
585 /* tell the board code to enable the panel */
586 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
591 board_cfg = &ch->cfg.board_cfg;
592 if (board_cfg->display_on)
593 board_cfg->display_on(board_cfg->board_data, ch->info);
599 static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
601 struct sh_mobile_lcdc_chan *ch;
602 struct sh_mobile_lcdc_board_cfg *board_cfg;
605 /* clean up deferred io and ask board code to disable panel */
606 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
612 * flush frame, and wait for frame end interrupt
613 * clean up deferred io and enable clock
615 if (ch->info && ch->info->fbdefio) {
617 schedule_delayed_work(&ch->info->deferred_work, 0);
618 wait_event(ch->frame_end_wait, ch->frame_end);
619 fb_deferred_io_cleanup(ch->info);
620 ch->info->fbdefio = NULL;
621 sh_mobile_lcdc_clk_on(priv);
624 board_cfg = &ch->cfg.board_cfg;
625 if (board_cfg->display_off)
626 board_cfg->display_off(board_cfg->board_data);
631 sh_mobile_lcdc_start_stop(priv, 0);
636 for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
637 if (priv->ch[k].enabled)
638 sh_mobile_lcdc_clk_off(priv);
641 static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
645 switch (ch->cfg.interface_type) {
646 case RGB8: ifm = 0; miftyp = 0; break;
647 case RGB9: ifm = 0; miftyp = 4; break;
648 case RGB12A: ifm = 0; miftyp = 5; break;
649 case RGB12B: ifm = 0; miftyp = 6; break;
650 case RGB16: ifm = 0; miftyp = 7; break;
651 case RGB18: ifm = 0; miftyp = 10; break;
652 case RGB24: ifm = 0; miftyp = 11; break;
653 case SYS8A: ifm = 1; miftyp = 0; break;
654 case SYS8B: ifm = 1; miftyp = 1; break;
655 case SYS8C: ifm = 1; miftyp = 2; break;
656 case SYS8D: ifm = 1; miftyp = 3; break;
657 case SYS9: ifm = 1; miftyp = 4; break;
658 case SYS12: ifm = 1; miftyp = 5; break;
659 case SYS16A: ifm = 1; miftyp = 7; break;
660 case SYS16B: ifm = 1; miftyp = 8; break;
661 case SYS16C: ifm = 1; miftyp = 9; break;
662 case SYS18: ifm = 1; miftyp = 10; break;
663 case SYS24: ifm = 1; miftyp = 11; break;
667 /* SUBLCD only supports SYS interface */
668 if (lcdc_chan_is_sublcd(ch)) {
675 ch->ldmt1r_value = (ifm << 12) | miftyp;
681 static int sh_mobile_lcdc_setup_clocks(struct platform_device *pdev,
683 struct sh_mobile_lcdc_priv *priv)
688 switch (clock_source) {
689 case LCDC_CLK_BUS: str = "bus_clk"; icksel = 0; break;
690 case LCDC_CLK_PERIPHERAL: str = "peripheral_clk"; icksel = 1; break;
691 case LCDC_CLK_EXTERNAL: str = NULL; icksel = 2; break;
696 priv->lddckr = icksel << 16;
699 priv->dot_clk = clk_get(&pdev->dev, str);
700 if (IS_ERR(priv->dot_clk)) {
701 dev_err(&pdev->dev, "cannot get dot clock %s\n", str);
702 return PTR_ERR(priv->dot_clk);
706 /* Runtime PM support involves two step for this driver:
707 * 1) Enable Runtime PM
708 * 2) Force Runtime PM Resume since hardware is accessed from probe()
710 priv->dev = &pdev->dev;
711 pm_runtime_enable(priv->dev);
712 pm_runtime_resume(priv->dev);
716 static int sh_mobile_lcdc_setcolreg(u_int regno,
717 u_int red, u_int green, u_int blue,
718 u_int transp, struct fb_info *info)
720 u32 *palette = info->pseudo_palette;
722 if (regno >= PALETTE_NR)
725 /* only FB_VISUAL_TRUECOLOR supported */
727 red >>= 16 - info->var.red.length;
728 green >>= 16 - info->var.green.length;
729 blue >>= 16 - info->var.blue.length;
730 transp >>= 16 - info->var.transp.length;
732 palette[regno] = (red << info->var.red.offset) |
733 (green << info->var.green.offset) |
734 (blue << info->var.blue.offset) |
735 (transp << info->var.transp.offset);
740 static struct fb_fix_screeninfo sh_mobile_lcdc_fix = {
741 .id = "SH Mobile LCDC",
742 .type = FB_TYPE_PACKED_PIXELS,
743 .visual = FB_VISUAL_TRUECOLOR,
744 .accel = FB_ACCEL_NONE,
750 static void sh_mobile_lcdc_fillrect(struct fb_info *info,
751 const struct fb_fillrect *rect)
753 sys_fillrect(info, rect);
754 sh_mobile_lcdc_deferred_io_touch(info);
757 static void sh_mobile_lcdc_copyarea(struct fb_info *info,
758 const struct fb_copyarea *area)
760 sys_copyarea(info, area);
761 sh_mobile_lcdc_deferred_io_touch(info);
764 static void sh_mobile_lcdc_imageblit(struct fb_info *info,
765 const struct fb_image *image)
767 sys_imageblit(info, image);
768 sh_mobile_lcdc_deferred_io_touch(info);
771 static int sh_mobile_fb_pan_display(struct fb_var_screeninfo *var,
772 struct fb_info *info)
774 struct sh_mobile_lcdc_chan *ch = info->par;
775 struct sh_mobile_lcdc_priv *priv = ch->lcdc;
776 unsigned long ldrcntr;
777 unsigned long new_pan_offset;
779 new_pan_offset = (var->yoffset * info->fix.line_length) +
780 (var->xoffset * (info->var.bits_per_pixel / 8));
782 if (new_pan_offset == ch->pan_offset)
783 return 0; /* No change, do nothing */
785 ldrcntr = lcdc_read(priv, _LDRCNTR);
787 /* Set the source address for the next refresh */
788 lcdc_write_chan_mirror(ch, LDSA1R, ch->dma_handle + new_pan_offset);
789 if (lcdc_chan_is_sublcd(ch))
790 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
792 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS);
794 ch->pan_offset = new_pan_offset;
796 sh_mobile_lcdc_deferred_io_touch(info);
801 static int sh_mobile_wait_for_vsync(struct fb_info *info)
803 struct sh_mobile_lcdc_chan *ch = info->par;
804 unsigned long ldintr;
807 /* Enable VSync End interrupt */
808 ldintr = lcdc_read(ch->lcdc, _LDINTR);
809 ldintr |= LDINTR_VEE;
810 lcdc_write(ch->lcdc, _LDINTR, ldintr);
812 ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion,
813 msecs_to_jiffies(100));
820 static int sh_mobile_ioctl(struct fb_info *info, unsigned int cmd,
826 case FBIO_WAITFORVSYNC:
827 retval = sh_mobile_wait_for_vsync(info);
831 retval = -ENOIOCTLCMD;
837 static struct fb_ops sh_mobile_lcdc_ops = {
838 .owner = THIS_MODULE,
839 .fb_setcolreg = sh_mobile_lcdc_setcolreg,
840 .fb_read = fb_sys_read,
841 .fb_write = fb_sys_write,
842 .fb_fillrect = sh_mobile_lcdc_fillrect,
843 .fb_copyarea = sh_mobile_lcdc_copyarea,
844 .fb_imageblit = sh_mobile_lcdc_imageblit,
845 .fb_pan_display = sh_mobile_fb_pan_display,
846 .fb_ioctl = sh_mobile_ioctl,
849 static int sh_mobile_lcdc_set_bpp(struct fb_var_screeninfo *var, int bpp)
852 case 16: /* PKF[4:0] = 00011 - RGB 565 */
853 var->red.offset = 11;
855 var->green.offset = 5;
856 var->green.length = 6;
857 var->blue.offset = 0;
858 var->blue.length = 5;
859 var->transp.offset = 0;
860 var->transp.length = 0;
863 case 32: /* PKF[4:0] = 00000 - RGB 888
864 * sh7722 pdf says 00RRGGBB but reality is GGBB00RR
865 * this may be because LDDDSR has word swap enabled..
869 var->green.offset = 24;
870 var->green.length = 8;
871 var->blue.offset = 16;
872 var->blue.length = 8;
873 var->transp.offset = 0;
874 var->transp.length = 0;
879 var->bits_per_pixel = bpp;
880 var->red.msb_right = 0;
881 var->green.msb_right = 0;
882 var->blue.msb_right = 0;
883 var->transp.msb_right = 0;
887 static int sh_mobile_lcdc_suspend(struct device *dev)
889 struct platform_device *pdev = to_platform_device(dev);
891 sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
895 static int sh_mobile_lcdc_resume(struct device *dev)
897 struct platform_device *pdev = to_platform_device(dev);
899 return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
902 static int sh_mobile_lcdc_runtime_suspend(struct device *dev)
904 struct platform_device *pdev = to_platform_device(dev);
905 struct sh_mobile_lcdc_priv *p = platform_get_drvdata(pdev);
906 struct sh_mobile_lcdc_chan *ch;
909 /* save per-channel registers */
910 for (k = 0; k < ARRAY_SIZE(p->ch); k++) {
914 for (n = 0; n < NR_CH_REGS; n++)
915 ch->saved_ch_regs[n] = lcdc_read_chan(ch, n);
918 /* save shared registers */
919 for (n = 0; n < NR_SHARED_REGS; n++)
920 p->saved_shared_regs[n] = lcdc_read(p, lcdc_shared_regs[n]);
922 /* turn off LCDC hardware */
923 lcdc_write(p, _LDCNT1R, 0);
927 static int sh_mobile_lcdc_runtime_resume(struct device *dev)
929 struct platform_device *pdev = to_platform_device(dev);
930 struct sh_mobile_lcdc_priv *p = platform_get_drvdata(pdev);
931 struct sh_mobile_lcdc_chan *ch;
934 /* restore per-channel registers */
935 for (k = 0; k < ARRAY_SIZE(p->ch); k++) {
939 for (n = 0; n < NR_CH_REGS; n++)
940 lcdc_write_chan(ch, n, ch->saved_ch_regs[n]);
943 /* restore shared registers */
944 for (n = 0; n < NR_SHARED_REGS; n++)
945 lcdc_write(p, lcdc_shared_regs[n], p->saved_shared_regs[n]);
950 static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
951 .suspend = sh_mobile_lcdc_suspend,
952 .resume = sh_mobile_lcdc_resume,
953 .runtime_suspend = sh_mobile_lcdc_runtime_suspend,
954 .runtime_resume = sh_mobile_lcdc_runtime_resume,
957 static int sh_mobile_lcdc_notify(struct notifier_block *nb,
958 unsigned long action, void *data)
960 struct fb_event *event = data;
961 struct fb_info *info = event->info;
962 struct sh_mobile_lcdc_chan *ch = info->par;
963 struct sh_mobile_lcdc_board_cfg *board_cfg = &ch->cfg.board_cfg;
964 struct fb_var_screeninfo *var;
966 if (&ch->lcdc->notifier != nb)
969 dev_dbg(info->dev, "%s(): action = %lu, data = %p\n",
970 __func__, action, event->data);
973 case FB_EVENT_SUSPEND:
974 if (board_cfg->display_off)
975 board_cfg->display_off(board_cfg->board_data);
976 pm_runtime_put(info->device);
978 case FB_EVENT_RESUME:
981 /* HDMI must be enabled before LCDC configuration */
982 if (board_cfg->display_on)
983 board_cfg->display_on(board_cfg->board_data, ch->info);
985 /* Check if the new display is not in our modelist */
986 if (ch->info->modelist.next &&
987 !fb_match_mode(var, &ch->info->modelist)) {
988 struct fb_videomode mode;
991 /* Can we handle this display? */
992 if (var->xres > ch->cfg.lcd_cfg.xres ||
993 var->yres > ch->cfg.lcd_cfg.yres)
996 /* Add to the modelist */
997 fb_var_to_videomode(&mode, var);
998 ret = fb_add_videomode(&mode, &ch->info->modelist);
1003 pm_runtime_get_sync(info->device);
1005 sh_mobile_lcdc_geometry(ch);
1013 static int sh_mobile_lcdc_remove(struct platform_device *pdev);
1015 static int __devinit sh_mobile_lcdc_probe(struct platform_device *pdev)
1017 struct fb_info *info;
1018 struct sh_mobile_lcdc_priv *priv;
1019 struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data;
1020 struct sh_mobile_lcdc_chan_cfg *cfg;
1021 struct resource *res;
1027 dev_err(&pdev->dev, "no platform data defined\n");
1031 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1032 i = platform_get_irq(pdev, 0);
1033 if (!res || i < 0) {
1034 dev_err(&pdev->dev, "cannot get platform resources\n");
1038 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
1040 dev_err(&pdev->dev, "cannot allocate device data\n");
1044 platform_set_drvdata(pdev, priv);
1046 error = request_irq(i, sh_mobile_lcdc_irq, IRQF_DISABLED,
1047 dev_name(&pdev->dev), priv);
1049 dev_err(&pdev->dev, "unable to request irq\n");
1054 atomic_set(&priv->hw_usecnt, -1);
1057 for (i = 0; i < ARRAY_SIZE(pdata->ch); i++) {
1058 struct sh_mobile_lcdc_chan *ch = priv->ch + j;
1061 memcpy(&ch->cfg, &pdata->ch[i], sizeof(pdata->ch[i]));
1063 error = sh_mobile_lcdc_check_interface(ch);
1065 dev_err(&pdev->dev, "unsupported interface type\n");
1068 init_waitqueue_head(&ch->frame_end_wait);
1069 init_completion(&ch->vsync_completion);
1072 switch (pdata->ch[i].chan) {
1073 case LCDC_CHAN_MAINLCD:
1074 ch->enabled = 1 << 1;
1075 ch->reg_offs = lcdc_offs_mainlcd;
1078 case LCDC_CHAN_SUBLCD:
1079 ch->enabled = 1 << 2;
1080 ch->reg_offs = lcdc_offs_sublcd;
1087 dev_err(&pdev->dev, "no channels defined\n");
1092 priv->base = ioremap_nocache(res->start, resource_size(res));
1096 error = sh_mobile_lcdc_setup_clocks(pdev, pdata->clock_source, priv);
1098 dev_err(&pdev->dev, "unable to setup clocks\n");
1102 for (i = 0; i < j; i++) {
1103 struct fb_var_screeninfo *var;
1104 const struct fb_videomode *lcd_cfg;
1105 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
1109 ch->info = framebuffer_alloc(0, &pdev->dev);
1111 dev_err(&pdev->dev, "unable to allocate fb_info\n");
1118 lcd_cfg = &cfg->lcd_cfg;
1119 info->fbops = &sh_mobile_lcdc_ops;
1120 fb_videomode_to_var(var, lcd_cfg);
1121 /* Default Y virtual resolution is 2x panel size */
1122 var->yres_virtual = var->yres * 2;
1124 error = sh_mobile_lcdc_set_bpp(var, cfg->bpp);
1128 info->fix = sh_mobile_lcdc_fix;
1129 info->fix.line_length = lcd_cfg->xres * (cfg->bpp / 8);
1130 info->fix.smem_len = info->fix.line_length *
1133 buf = dma_alloc_coherent(&pdev->dev, info->fix.smem_len,
1134 &ch->dma_handle, GFP_KERNEL);
1136 dev_err(&pdev->dev, "unable to allocate buffer\n");
1141 info->pseudo_palette = &ch->pseudo_palette;
1142 info->flags = FBINFO_FLAG_DEFAULT;
1144 error = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
1146 dev_err(&pdev->dev, "unable to allocate cmap\n");
1147 dma_free_coherent(&pdev->dev, info->fix.smem_len,
1148 buf, ch->dma_handle);
1152 info->fix.smem_start = ch->dma_handle;
1153 info->screen_base = buf;
1154 info->device = &pdev->dev;
1161 error = sh_mobile_lcdc_start(priv);
1163 dev_err(&pdev->dev, "unable to start hardware\n");
1167 for (i = 0; i < j; i++) {
1168 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
1172 if (info->fbdefio) {
1173 ch->sglist = vmalloc(sizeof(struct scatterlist) *
1174 info->fix.smem_len >> PAGE_SHIFT);
1176 dev_err(&pdev->dev, "cannot allocate sglist\n");
1181 error = register_framebuffer(info);
1186 "registered %s/%s as %dx%d %dbpp.\n",
1188 (ch->cfg.chan == LCDC_CHAN_MAINLCD) ?
1189 "mainlcd" : "sublcd",
1190 (int) ch->cfg.lcd_cfg.xres,
1191 (int) ch->cfg.lcd_cfg.yres,
1194 /* deferred io mode: disable clock to save power */
1195 if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED)
1196 sh_mobile_lcdc_clk_off(priv);
1199 /* Failure ignored */
1200 priv->notifier.notifier_call = sh_mobile_lcdc_notify;
1201 fb_register_client(&priv->notifier);
1205 sh_mobile_lcdc_remove(pdev);
1210 static int sh_mobile_lcdc_remove(struct platform_device *pdev)
1212 struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
1213 struct fb_info *info;
1216 fb_unregister_client(&priv->notifier);
1218 for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
1219 if (priv->ch[i].info && priv->ch[i].info->dev)
1220 unregister_framebuffer(priv->ch[i].info);
1222 sh_mobile_lcdc_stop(priv);
1224 for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
1225 info = priv->ch[i].info;
1227 if (!info || !info->device)
1230 if (priv->ch[i].sglist)
1231 vfree(priv->ch[i].sglist);
1233 dma_free_coherent(&pdev->dev, info->fix.smem_len,
1234 info->screen_base, priv->ch[i].dma_handle);
1235 fb_dealloc_cmap(&info->cmap);
1236 framebuffer_release(info);
1240 clk_put(priv->dot_clk);
1243 pm_runtime_disable(priv->dev);
1246 iounmap(priv->base);
1249 free_irq(priv->irq, priv);
1254 static struct platform_driver sh_mobile_lcdc_driver = {
1256 .name = "sh_mobile_lcdc_fb",
1257 .owner = THIS_MODULE,
1258 .pm = &sh_mobile_lcdc_dev_pm_ops,
1260 .probe = sh_mobile_lcdc_probe,
1261 .remove = sh_mobile_lcdc_remove,
1264 static int __init sh_mobile_lcdc_init(void)
1266 return platform_driver_register(&sh_mobile_lcdc_driver);
1269 static void __exit sh_mobile_lcdc_exit(void)
1271 platform_driver_unregister(&sh_mobile_lcdc_driver);
1274 module_init(sh_mobile_lcdc_init);
1275 module_exit(sh_mobile_lcdc_exit);
1277 MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
1278 MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
1279 MODULE_LICENSE("GPL v2");