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>
15 #include <linux/clk.h>
16 #include <linux/pm_runtime.h>
17 #include <linux/platform_device.h>
18 #include <linux/dma-mapping.h>
19 #include <linux/interrupt.h>
20 #include <linux/vmalloc.h>
21 #include <linux/ioctl.h>
22 #include <linux/slab.h>
23 #include <linux/console.h>
24 #include <video/sh_mobile_lcdc.h>
25 #include <asm/atomic.h>
27 #include "sh_mobile_lcdcfb.h"
29 #define SIDE_B_OFFSET 0x1000
30 #define MIRROR_OFFSET 0x2000
32 /* shared registers */
34 #define _LDDCKSTPR 0x414
37 #define _LDCNT1R 0x470
38 #define _LDCNT2R 0x474
39 #define _LDRCNTR 0x478
41 #define _LDDWD0R 0x800
46 /* shared registers and their order for context save/restore */
47 static int lcdc_shared_regs
[] = {
55 #define NR_SHARED_REGS ARRAY_SIZE(lcdc_shared_regs)
60 static unsigned long lcdc_offs_mainlcd
[NR_CH_REGS
] = {
79 static unsigned long lcdc_offs_sublcd
[NR_CH_REGS
] = {
97 #define START_LCDC 0x00000001
98 #define LCDC_RESET 0x00000100
99 #define DISPLAY_BEU 0x00000008
100 #define LCDC_ENABLE 0x00000001
101 #define LDINTR_FE 0x00000400
102 #define LDINTR_VSE 0x00000200
103 #define LDINTR_VEE 0x00000100
104 #define LDINTR_FS 0x00000004
105 #define LDINTR_VSS 0x00000002
106 #define LDINTR_VES 0x00000001
107 #define LDRCNTR_SRS 0x00020000
108 #define LDRCNTR_SRC 0x00010000
109 #define LDRCNTR_MRS 0x00000002
110 #define LDRCNTR_MRC 0x00000001
111 #define LDSR_MRS 0x00000100
113 static const struct fb_videomode default_720p
= {
128 .sync
= FB_SYNC_VERT_HIGH_ACT
| FB_SYNC_HOR_HIGH_ACT
,
131 struct sh_mobile_lcdc_priv
{
137 unsigned long lddckr
;
138 struct sh_mobile_lcdc_chan ch
[2];
139 struct notifier_block notifier
;
140 unsigned long saved_shared_regs
[NR_SHARED_REGS
];
142 int forced_bpp
; /* 2 channel LCDC must share bpp setting */
145 static bool banked(int reg_nr
)
164 static void lcdc_write_chan(struct sh_mobile_lcdc_chan
*chan
,
165 int reg_nr
, unsigned long data
)
167 iowrite32(data
, chan
->lcdc
->base
+ chan
->reg_offs
[reg_nr
]);
169 iowrite32(data
, chan
->lcdc
->base
+ chan
->reg_offs
[reg_nr
] +
173 static void lcdc_write_chan_mirror(struct sh_mobile_lcdc_chan
*chan
,
174 int reg_nr
, unsigned long data
)
176 iowrite32(data
, chan
->lcdc
->base
+ chan
->reg_offs
[reg_nr
] +
180 static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan
*chan
,
183 return ioread32(chan
->lcdc
->base
+ chan
->reg_offs
[reg_nr
]);
186 static void lcdc_write(struct sh_mobile_lcdc_priv
*priv
,
187 unsigned long reg_offs
, unsigned long data
)
189 iowrite32(data
, priv
->base
+ reg_offs
);
192 static unsigned long lcdc_read(struct sh_mobile_lcdc_priv
*priv
,
193 unsigned long reg_offs
)
195 return ioread32(priv
->base
+ reg_offs
);
198 static void lcdc_wait_bit(struct sh_mobile_lcdc_priv
*priv
,
199 unsigned long reg_offs
,
200 unsigned long mask
, unsigned long until
)
202 while ((lcdc_read(priv
, reg_offs
) & mask
) != until
)
206 static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan
*chan
)
208 return chan
->cfg
.chan
== LCDC_CHAN_SUBLCD
;
211 static void lcdc_sys_write_index(void *handle
, unsigned long data
)
213 struct sh_mobile_lcdc_chan
*ch
= handle
;
215 lcdc_write(ch
->lcdc
, _LDDWD0R
, data
| 0x10000000);
216 lcdc_wait_bit(ch
->lcdc
, _LDSR
, 2, 0);
217 lcdc_write(ch
->lcdc
, _LDDWAR
, 1 | (lcdc_chan_is_sublcd(ch
) ? 2 : 0));
218 lcdc_wait_bit(ch
->lcdc
, _LDSR
, 2, 0);
221 static void lcdc_sys_write_data(void *handle
, unsigned long data
)
223 struct sh_mobile_lcdc_chan
*ch
= handle
;
225 lcdc_write(ch
->lcdc
, _LDDWD0R
, data
| 0x11000000);
226 lcdc_wait_bit(ch
->lcdc
, _LDSR
, 2, 0);
227 lcdc_write(ch
->lcdc
, _LDDWAR
, 1 | (lcdc_chan_is_sublcd(ch
) ? 2 : 0));
228 lcdc_wait_bit(ch
->lcdc
, _LDSR
, 2, 0);
231 static unsigned long lcdc_sys_read_data(void *handle
)
233 struct sh_mobile_lcdc_chan
*ch
= handle
;
235 lcdc_write(ch
->lcdc
, _LDDRDR
, 0x01000000);
236 lcdc_wait_bit(ch
->lcdc
, _LDSR
, 2, 0);
237 lcdc_write(ch
->lcdc
, _LDDRAR
, 1 | (lcdc_chan_is_sublcd(ch
) ? 2 : 0));
239 lcdc_wait_bit(ch
->lcdc
, _LDSR
, 2, 0);
241 return lcdc_read(ch
->lcdc
, _LDDRDR
) & 0x3ffff;
244 struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops
= {
245 lcdc_sys_write_index
,
250 static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv
*priv
)
252 if (atomic_inc_and_test(&priv
->hw_usecnt
)) {
253 pm_runtime_get_sync(priv
->dev
);
255 clk_enable(priv
->dot_clk
);
259 static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv
*priv
)
261 if (atomic_sub_return(1, &priv
->hw_usecnt
) == -1) {
263 clk_disable(priv
->dot_clk
);
264 pm_runtime_put(priv
->dev
);
268 static int sh_mobile_lcdc_sginit(struct fb_info
*info
,
269 struct list_head
*pagelist
)
271 struct sh_mobile_lcdc_chan
*ch
= info
->par
;
272 unsigned int nr_pages_max
= info
->fix
.smem_len
>> PAGE_SHIFT
;
276 sg_init_table(ch
->sglist
, nr_pages_max
);
278 list_for_each_entry(page
, pagelist
, lru
)
279 sg_set_page(&ch
->sglist
[nr_pages
++], page
, PAGE_SIZE
, 0);
284 static void sh_mobile_lcdc_deferred_io(struct fb_info
*info
,
285 struct list_head
*pagelist
)
287 struct sh_mobile_lcdc_chan
*ch
= info
->par
;
288 struct sh_mobile_lcdc_board_cfg
*bcfg
= &ch
->cfg
.board_cfg
;
290 /* enable clocks before accessing hardware */
291 sh_mobile_lcdc_clk_on(ch
->lcdc
);
294 * It's possible to get here without anything on the pagelist via
295 * sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync()
296 * invocation. In the former case, the acceleration routines are
297 * stepped in to when using the framebuffer console causing the
298 * workqueue to be scheduled without any dirty pages on the list.
300 * Despite this, a panel update is still needed given that the
301 * acceleration routines have their own methods for writing in
302 * that still need to be updated.
304 * The fsync() and empty pagelist case could be optimized for,
305 * but we don't bother, as any application exhibiting such
306 * behaviour is fundamentally broken anyways.
308 if (!list_empty(pagelist
)) {
309 unsigned int nr_pages
= sh_mobile_lcdc_sginit(info
, pagelist
);
311 /* trigger panel update */
312 dma_map_sg(info
->dev
, ch
->sglist
, nr_pages
, DMA_TO_DEVICE
);
313 if (bcfg
->start_transfer
)
314 bcfg
->start_transfer(bcfg
->board_data
, ch
,
315 &sh_mobile_lcdc_sys_bus_ops
);
316 lcdc_write_chan(ch
, LDSM2R
, 1);
317 dma_unmap_sg(info
->dev
, ch
->sglist
, nr_pages
, DMA_TO_DEVICE
);
319 if (bcfg
->start_transfer
)
320 bcfg
->start_transfer(bcfg
->board_data
, ch
,
321 &sh_mobile_lcdc_sys_bus_ops
);
322 lcdc_write_chan(ch
, LDSM2R
, 1);
326 static void sh_mobile_lcdc_deferred_io_touch(struct fb_info
*info
)
328 struct fb_deferred_io
*fbdefio
= info
->fbdefio
;
331 schedule_delayed_work(&info
->deferred_work
, fbdefio
->delay
);
334 static irqreturn_t
sh_mobile_lcdc_irq(int irq
, void *data
)
336 struct sh_mobile_lcdc_priv
*priv
= data
;
337 struct sh_mobile_lcdc_chan
*ch
;
339 unsigned long ldintr
;
343 /* acknowledge interrupt */
344 ldintr
= tmp
= lcdc_read(priv
, _LDINTR
);
346 * disable further VSYNC End IRQs, preserve all other enabled IRQs,
347 * write 0 to bits 0-6 to ack all triggered IRQs.
349 tmp
&= 0xffffff00 & ~LDINTR_VEE
;
350 lcdc_write(priv
, _LDINTR
, tmp
);
352 /* figure out if this interrupt is for main or sub lcd */
353 is_sub
= (lcdc_read(priv
, _LDSR
) & (1 << 10)) ? 1 : 0;
355 /* wake up channel and disable clocks */
356 for (k
= 0; k
< ARRAY_SIZE(priv
->ch
); k
++) {
363 if (ldintr
& LDINTR_FS
) {
364 if (is_sub
== lcdc_chan_is_sublcd(ch
)) {
366 wake_up(&ch
->frame_end_wait
);
368 sh_mobile_lcdc_clk_off(priv
);
373 if (ldintr
& LDINTR_VES
)
374 complete(&ch
->vsync_completion
);
380 static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv
*priv
,
383 unsigned long tmp
= lcdc_read(priv
, _LDCNT2R
);
386 /* start or stop the lcdc */
388 lcdc_write(priv
, _LDCNT2R
, tmp
| START_LCDC
);
390 lcdc_write(priv
, _LDCNT2R
, tmp
& ~START_LCDC
);
392 /* wait until power is applied/stopped on all channels */
393 for (k
= 0; k
< ARRAY_SIZE(priv
->ch
); k
++)
394 if (lcdc_read(priv
, _LDCNT2R
) & priv
->ch
[k
].enabled
)
396 tmp
= lcdc_read_chan(&priv
->ch
[k
], LDPMR
) & 3;
397 if (start
&& tmp
== 3)
399 if (!start
&& tmp
== 0)
405 lcdc_write(priv
, _LDDCKSTPR
, 1); /* stop dotclock */
408 static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan
*ch
)
410 struct fb_var_screeninfo
*var
= &ch
->info
->var
, *display_var
= &ch
->display_var
;
411 unsigned long h_total
, hsync_pos
, display_h_total
;
414 tmp
= ch
->ldmt1r_value
;
415 tmp
|= (var
->sync
& FB_SYNC_VERT_HIGH_ACT
) ? 0 : 1 << 28;
416 tmp
|= (var
->sync
& FB_SYNC_HOR_HIGH_ACT
) ? 0 : 1 << 27;
417 tmp
|= (ch
->cfg
.flags
& LCDC_FLAGS_DWPOL
) ? 1 << 26 : 0;
418 tmp
|= (ch
->cfg
.flags
& LCDC_FLAGS_DIPOL
) ? 1 << 25 : 0;
419 tmp
|= (ch
->cfg
.flags
& LCDC_FLAGS_DAPOL
) ? 1 << 24 : 0;
420 tmp
|= (ch
->cfg
.flags
& LCDC_FLAGS_HSCNT
) ? 1 << 17 : 0;
421 tmp
|= (ch
->cfg
.flags
& LCDC_FLAGS_DWCNT
) ? 1 << 16 : 0;
422 lcdc_write_chan(ch
, LDMT1R
, tmp
);
425 lcdc_write_chan(ch
, LDMT2R
, ch
->cfg
.sys_bus_cfg
.ldmt2r
);
426 lcdc_write_chan(ch
, LDMT3R
, ch
->cfg
.sys_bus_cfg
.ldmt3r
);
428 /* horizontal configuration */
429 h_total
= display_var
->xres
+ display_var
->hsync_len
+
430 display_var
->left_margin
+ display_var
->right_margin
;
431 tmp
= h_total
/ 8; /* HTCN */
432 tmp
|= (min(display_var
->xres
, var
->xres
) / 8) << 16; /* HDCN */
433 lcdc_write_chan(ch
, LDHCNR
, tmp
);
435 hsync_pos
= display_var
->xres
+ display_var
->right_margin
;
436 tmp
= hsync_pos
/ 8; /* HSYNP */
437 tmp
|= (display_var
->hsync_len
/ 8) << 16; /* HSYNW */
438 lcdc_write_chan(ch
, LDHSYNR
, tmp
);
440 /* vertical configuration */
441 tmp
= display_var
->yres
+ display_var
->vsync_len
+
442 display_var
->upper_margin
+ display_var
->lower_margin
; /* VTLN */
443 tmp
|= min(display_var
->yres
, var
->yres
) << 16; /* VDLN */
444 lcdc_write_chan(ch
, LDVLNR
, tmp
);
446 tmp
= display_var
->yres
+ display_var
->lower_margin
; /* VSYNP */
447 tmp
|= display_var
->vsync_len
<< 16; /* VSYNW */
448 lcdc_write_chan(ch
, LDVSYNR
, tmp
);
450 /* Adjust horizontal synchronisation for HDMI */
451 display_h_total
= display_var
->xres
+ display_var
->hsync_len
+
452 display_var
->left_margin
+ display_var
->right_margin
;
453 tmp
= ((display_var
->xres
& 7) << 24) |
454 ((display_h_total
& 7) << 16) |
455 ((display_var
->hsync_len
& 7) << 8) |
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
;
469 /* enable clocks before accessing the hardware */
470 for (k
= 0; k
< ARRAY_SIZE(priv
->ch
); k
++) {
471 if (priv
->ch
[k
].enabled
) {
472 sh_mobile_lcdc_clk_on(priv
);
474 bpp
= priv
->ch
[k
].info
->var
.bits_per_pixel
;
479 lcdc_write(priv
, _LDCNT2R
, lcdc_read(priv
, _LDCNT2R
) | LCDC_RESET
);
480 lcdc_wait_bit(priv
, _LDCNT2R
, LCDC_RESET
, 0);
482 /* enable LCDC channels */
483 tmp
= lcdc_read(priv
, _LDCNT2R
);
484 tmp
|= priv
->ch
[0].enabled
;
485 tmp
|= priv
->ch
[1].enabled
;
486 lcdc_write(priv
, _LDCNT2R
, tmp
);
488 /* read data from external memory, avoid using the BEU for now */
489 lcdc_write(priv
, _LDCNT2R
, lcdc_read(priv
, _LDCNT2R
) & ~DISPLAY_BEU
);
491 /* stop the lcdc first */
492 sh_mobile_lcdc_start_stop(priv
, 0);
494 /* configure clocks */
496 for (k
= 0; k
< ARRAY_SIZE(priv
->ch
); k
++) {
499 if (!priv
->ch
[k
].enabled
)
502 m
= ch
->cfg
.clock_divider
;
508 tmp
|= m
<< (lcdc_chan_is_sublcd(ch
) ? 8 : 0);
510 /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider denominator */
511 lcdc_write_chan(ch
, LDDCKPAT1R
, 0);
512 lcdc_write_chan(ch
, LDDCKPAT2R
, (1 << (m
/2)) - 1);
515 lcdc_write(priv
, _LDDCKR
, tmp
);
517 /* start dotclock again */
518 lcdc_write(priv
, _LDDCKSTPR
, 0);
519 lcdc_wait_bit(priv
, _LDDCKSTPR
, ~0, 0);
521 /* interrupts are disabled to begin with */
522 lcdc_write(priv
, _LDINTR
, 0);
524 for (k
= 0; k
< ARRAY_SIZE(priv
->ch
); k
++) {
530 sh_mobile_lcdc_geometry(ch
);
533 lcdc_write_chan(ch
, LDPMR
, 0);
535 board_cfg
= &ch
->cfg
.board_cfg
;
536 if (board_cfg
->setup_sys
)
537 ret
= board_cfg
->setup_sys(board_cfg
->board_data
, ch
,
538 &sh_mobile_lcdc_sys_bus_ops
);
543 /* word and long word swap */
546 lcdc_write(priv
, _LDDDSR
, lcdc_read(priv
, _LDDDSR
) | 6);
549 lcdc_write(priv
, _LDDDSR
, lcdc_read(priv
, _LDDDSR
) | 7);
552 lcdc_write(priv
, _LDDDSR
, lcdc_read(priv
, _LDDDSR
) | 4);
556 for (k
= 0; k
< ARRAY_SIZE(priv
->ch
); k
++) {
559 if (!priv
->ch
[k
].enabled
)
562 /* set bpp format in PKF[4:0] */
563 tmp
= lcdc_read_chan(ch
, LDDFR
);
565 switch (ch
->info
->var
.bits_per_pixel
) {
575 lcdc_write_chan(ch
, LDDFR
, tmp
);
577 /* point out our frame buffer */
578 lcdc_write_chan(ch
, LDSA1R
, ch
->info
->fix
.smem_start
);
581 lcdc_write_chan(ch
, LDMLSR
, ch
->info
->fix
.line_length
);
583 /* setup deferred io if SYS bus */
584 tmp
= ch
->cfg
.sys_bus_cfg
.deferred_io_msec
;
585 if (ch
->ldmt1r_value
& (1 << 12) && tmp
) {
586 ch
->defio
.deferred_io
= sh_mobile_lcdc_deferred_io
;
587 ch
->defio
.delay
= msecs_to_jiffies(tmp
);
588 ch
->info
->fbdefio
= &ch
->defio
;
589 fb_deferred_io_init(ch
->info
);
592 lcdc_write_chan(ch
, LDSM1R
, 1);
594 /* enable "Frame End Interrupt Enable" bit */
595 lcdc_write(priv
, _LDINTR
, LDINTR_FE
);
598 /* continuous read mode */
599 lcdc_write_chan(ch
, LDSM1R
, 0);
604 lcdc_write(priv
, _LDCNT1R
, LCDC_ENABLE
);
607 sh_mobile_lcdc_start_stop(priv
, 1);
610 /* tell the board code to enable the panel */
611 for (k
= 0; k
< ARRAY_SIZE(priv
->ch
); k
++) {
616 board_cfg
= &ch
->cfg
.board_cfg
;
617 if (try_module_get(board_cfg
->owner
) && board_cfg
->display_on
) {
618 board_cfg
->display_on(board_cfg
->board_data
, ch
->info
);
619 module_put(board_cfg
->owner
);
626 static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv
*priv
)
628 struct sh_mobile_lcdc_chan
*ch
;
629 struct sh_mobile_lcdc_board_cfg
*board_cfg
;
632 /* clean up deferred io and ask board code to disable panel */
633 for (k
= 0; k
< ARRAY_SIZE(priv
->ch
); k
++) {
639 * flush frame, and wait for frame end interrupt
640 * clean up deferred io and enable clock
642 if (ch
->info
&& ch
->info
->fbdefio
) {
644 schedule_delayed_work(&ch
->info
->deferred_work
, 0);
645 wait_event(ch
->frame_end_wait
, ch
->frame_end
);
646 fb_deferred_io_cleanup(ch
->info
);
647 ch
->info
->fbdefio
= NULL
;
648 sh_mobile_lcdc_clk_on(priv
);
651 board_cfg
= &ch
->cfg
.board_cfg
;
652 if (try_module_get(board_cfg
->owner
) && board_cfg
->display_off
) {
653 board_cfg
->display_off(board_cfg
->board_data
);
654 module_put(board_cfg
->owner
);
660 sh_mobile_lcdc_start_stop(priv
, 0);
665 for (k
= 0; k
< ARRAY_SIZE(priv
->ch
); k
++)
666 if (priv
->ch
[k
].enabled
)
667 sh_mobile_lcdc_clk_off(priv
);
670 static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan
*ch
)
674 switch (ch
->cfg
.interface_type
) {
675 case RGB8
: ifm
= 0; miftyp
= 0; break;
676 case RGB9
: ifm
= 0; miftyp
= 4; break;
677 case RGB12A
: ifm
= 0; miftyp
= 5; break;
678 case RGB12B
: ifm
= 0; miftyp
= 6; break;
679 case RGB16
: ifm
= 0; miftyp
= 7; break;
680 case RGB18
: ifm
= 0; miftyp
= 10; break;
681 case RGB24
: ifm
= 0; miftyp
= 11; break;
682 case SYS8A
: ifm
= 1; miftyp
= 0; break;
683 case SYS8B
: ifm
= 1; miftyp
= 1; break;
684 case SYS8C
: ifm
= 1; miftyp
= 2; break;
685 case SYS8D
: ifm
= 1; miftyp
= 3; break;
686 case SYS9
: ifm
= 1; miftyp
= 4; break;
687 case SYS12
: ifm
= 1; miftyp
= 5; break;
688 case SYS16A
: ifm
= 1; miftyp
= 7; break;
689 case SYS16B
: ifm
= 1; miftyp
= 8; break;
690 case SYS16C
: ifm
= 1; miftyp
= 9; break;
691 case SYS18
: ifm
= 1; miftyp
= 10; break;
692 case SYS24
: ifm
= 1; miftyp
= 11; break;
696 /* SUBLCD only supports SYS interface */
697 if (lcdc_chan_is_sublcd(ch
)) {
704 ch
->ldmt1r_value
= (ifm
<< 12) | miftyp
;
710 static int sh_mobile_lcdc_setup_clocks(struct platform_device
*pdev
,
712 struct sh_mobile_lcdc_priv
*priv
)
717 switch (clock_source
) {
718 case LCDC_CLK_BUS
: str
= "bus_clk"; icksel
= 0; break;
719 case LCDC_CLK_PERIPHERAL
: str
= "peripheral_clk"; icksel
= 1; break;
720 case LCDC_CLK_EXTERNAL
: str
= NULL
; icksel
= 2; break;
725 priv
->lddckr
= icksel
<< 16;
728 priv
->dot_clk
= clk_get(&pdev
->dev
, str
);
729 if (IS_ERR(priv
->dot_clk
)) {
730 dev_err(&pdev
->dev
, "cannot get dot clock %s\n", str
);
731 return PTR_ERR(priv
->dot_clk
);
735 /* Runtime PM support involves two step for this driver:
736 * 1) Enable Runtime PM
737 * 2) Force Runtime PM Resume since hardware is accessed from probe()
739 priv
->dev
= &pdev
->dev
;
740 pm_runtime_enable(priv
->dev
);
741 pm_runtime_resume(priv
->dev
);
745 static int sh_mobile_lcdc_setcolreg(u_int regno
,
746 u_int red
, u_int green
, u_int blue
,
747 u_int transp
, struct fb_info
*info
)
749 u32
*palette
= info
->pseudo_palette
;
751 if (regno
>= PALETTE_NR
)
754 /* only FB_VISUAL_TRUECOLOR supported */
756 red
>>= 16 - info
->var
.red
.length
;
757 green
>>= 16 - info
->var
.green
.length
;
758 blue
>>= 16 - info
->var
.blue
.length
;
759 transp
>>= 16 - info
->var
.transp
.length
;
761 palette
[regno
] = (red
<< info
->var
.red
.offset
) |
762 (green
<< info
->var
.green
.offset
) |
763 (blue
<< info
->var
.blue
.offset
) |
764 (transp
<< info
->var
.transp
.offset
);
769 static struct fb_fix_screeninfo sh_mobile_lcdc_fix
= {
770 .id
= "SH Mobile LCDC",
771 .type
= FB_TYPE_PACKED_PIXELS
,
772 .visual
= FB_VISUAL_TRUECOLOR
,
773 .accel
= FB_ACCEL_NONE
,
779 static void sh_mobile_lcdc_fillrect(struct fb_info
*info
,
780 const struct fb_fillrect
*rect
)
782 sys_fillrect(info
, rect
);
783 sh_mobile_lcdc_deferred_io_touch(info
);
786 static void sh_mobile_lcdc_copyarea(struct fb_info
*info
,
787 const struct fb_copyarea
*area
)
789 sys_copyarea(info
, area
);
790 sh_mobile_lcdc_deferred_io_touch(info
);
793 static void sh_mobile_lcdc_imageblit(struct fb_info
*info
,
794 const struct fb_image
*image
)
796 sys_imageblit(info
, image
);
797 sh_mobile_lcdc_deferred_io_touch(info
);
800 static int sh_mobile_fb_pan_display(struct fb_var_screeninfo
*var
,
801 struct fb_info
*info
)
803 struct sh_mobile_lcdc_chan
*ch
= info
->par
;
804 struct sh_mobile_lcdc_priv
*priv
= ch
->lcdc
;
805 unsigned long ldrcntr
;
806 unsigned long new_pan_offset
;
808 new_pan_offset
= (var
->yoffset
* info
->fix
.line_length
) +
809 (var
->xoffset
* (info
->var
.bits_per_pixel
/ 8));
811 if (new_pan_offset
== ch
->pan_offset
)
812 return 0; /* No change, do nothing */
814 ldrcntr
= lcdc_read(priv
, _LDRCNTR
);
816 /* Set the source address for the next refresh */
817 lcdc_write_chan_mirror(ch
, LDSA1R
, ch
->dma_handle
+ new_pan_offset
);
818 if (lcdc_chan_is_sublcd(ch
))
819 lcdc_write(ch
->lcdc
, _LDRCNTR
, ldrcntr
^ LDRCNTR_SRS
);
821 lcdc_write(ch
->lcdc
, _LDRCNTR
, ldrcntr
^ LDRCNTR_MRS
);
823 ch
->pan_offset
= new_pan_offset
;
825 sh_mobile_lcdc_deferred_io_touch(info
);
830 static int sh_mobile_wait_for_vsync(struct fb_info
*info
)
832 struct sh_mobile_lcdc_chan
*ch
= info
->par
;
833 unsigned long ldintr
;
836 /* Enable VSync End interrupt */
837 ldintr
= lcdc_read(ch
->lcdc
, _LDINTR
);
838 ldintr
|= LDINTR_VEE
;
839 lcdc_write(ch
->lcdc
, _LDINTR
, ldintr
);
841 ret
= wait_for_completion_interruptible_timeout(&ch
->vsync_completion
,
842 msecs_to_jiffies(100));
849 static int sh_mobile_ioctl(struct fb_info
*info
, unsigned int cmd
,
855 case FBIO_WAITFORVSYNC
:
856 retval
= sh_mobile_wait_for_vsync(info
);
860 retval
= -ENOIOCTLCMD
;
866 static void sh_mobile_fb_reconfig(struct fb_info
*info
)
868 struct sh_mobile_lcdc_chan
*ch
= info
->par
;
869 struct fb_videomode mode1
, mode2
;
870 struct fb_event event
;
871 int evnt
= FB_EVENT_MODE_CHANGE_ALL
;
873 if (ch
->use_count
> 1 || (ch
->use_count
== 1 && !info
->fbcon_par
))
874 /* More framebuffer users are active */
877 fb_var_to_videomode(&mode1
, &ch
->display_var
);
878 fb_var_to_videomode(&mode2
, &info
->var
);
880 if (fb_mode_is_equal(&mode1
, &mode2
))
883 /* Display has been re-plugged, framebuffer is free now, reconfigure */
884 if (fb_set_var(info
, &ch
->display_var
) < 0)
885 /* Couldn't reconfigure, hopefully, can continue as before */
888 info
->fix
.line_length
= mode1
.xres
* (ch
->cfg
.bpp
/ 8);
891 * fb_set_var() calls the notifier change internally, only if
892 * FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a
893 * user event, we have to call the chain ourselves.
897 fb_notifier_call_chain(evnt
, &event
);
901 * Locking: both .fb_release() and .fb_open() are called with info->lock held if
902 * user == 1, or with console sem held, if user == 0.
904 static int sh_mobile_release(struct fb_info
*info
, int user
)
906 struct sh_mobile_lcdc_chan
*ch
= info
->par
;
908 mutex_lock(&ch
->open_lock
);
909 dev_dbg(info
->dev
, "%s(): %d users\n", __func__
, ch
->use_count
);
913 /* Nothing to reconfigure, when called from fbcon */
915 acquire_console_sem();
916 sh_mobile_fb_reconfig(info
);
917 release_console_sem();
920 mutex_unlock(&ch
->open_lock
);
925 static int sh_mobile_open(struct fb_info
*info
, int user
)
927 struct sh_mobile_lcdc_chan
*ch
= info
->par
;
929 mutex_lock(&ch
->open_lock
);
932 dev_dbg(info
->dev
, "%s(): %d users\n", __func__
, ch
->use_count
);
933 mutex_unlock(&ch
->open_lock
);
938 static int sh_mobile_check_var(struct fb_var_screeninfo
*var
, struct fb_info
*info
)
940 struct sh_mobile_lcdc_chan
*ch
= info
->par
;
941 struct sh_mobile_lcdc_priv
*p
= ch
->lcdc
;
943 if (var
->xres
> MAX_XRES
|| var
->yres
> MAX_YRES
||
944 var
->xres
* var
->yres
* (ch
->cfg
.bpp
/ 8) * 2 > info
->fix
.smem_len
) {
945 dev_warn(info
->dev
, "Invalid info: %u-%u-%u-%u x %u-%u-%u-%u @ %lukHz!\n",
946 var
->left_margin
, var
->xres
, var
->right_margin
, var
->hsync_len
,
947 var
->upper_margin
, var
->yres
, var
->lower_margin
, var
->vsync_len
,
948 PICOS2KHZ(var
->pixclock
));
952 /* only accept the forced_bpp for dual channel configurations */
953 if (p
->forced_bpp
&& p
->forced_bpp
!= var
->bits_per_pixel
)
956 switch (var
->bits_per_pixel
) {
957 case 16: /* PKF[4:0] = 00011 - RGB 565 */
958 case 24: /* PKF[4:0] = 01011 - RGB 888 */
959 case 32: /* PKF[4:0] = 00000 - RGBA 888 */
968 static struct fb_ops sh_mobile_lcdc_ops
= {
969 .owner
= THIS_MODULE
,
970 .fb_setcolreg
= sh_mobile_lcdc_setcolreg
,
971 .fb_read
= fb_sys_read
,
972 .fb_write
= fb_sys_write
,
973 .fb_fillrect
= sh_mobile_lcdc_fillrect
,
974 .fb_copyarea
= sh_mobile_lcdc_copyarea
,
975 .fb_imageblit
= sh_mobile_lcdc_imageblit
,
976 .fb_pan_display
= sh_mobile_fb_pan_display
,
977 .fb_ioctl
= sh_mobile_ioctl
,
978 .fb_open
= sh_mobile_open
,
979 .fb_release
= sh_mobile_release
,
980 .fb_check_var
= sh_mobile_check_var
,
983 static int sh_mobile_lcdc_set_bpp(struct fb_var_screeninfo
*var
, int bpp
)
986 case 16: /* PKF[4:0] = 00011 - RGB 565 */
987 var
->red
.offset
= 11;
989 var
->green
.offset
= 5;
990 var
->green
.length
= 6;
991 var
->blue
.offset
= 0;
992 var
->blue
.length
= 5;
993 var
->transp
.offset
= 0;
994 var
->transp
.length
= 0;
997 case 24: /* PKF[4:0] = 01011 - RGB 888 */
998 var
->red
.offset
= 16;
1000 var
->green
.offset
= 8;
1001 var
->green
.length
= 8;
1002 var
->blue
.offset
= 0;
1003 var
->blue
.length
= 8;
1004 var
->transp
.offset
= 0;
1005 var
->transp
.length
= 0;
1008 case 32: /* PKF[4:0] = 00000 - RGBA 888 */
1009 var
->red
.offset
= 16;
1010 var
->red
.length
= 8;
1011 var
->green
.offset
= 8;
1012 var
->green
.length
= 8;
1013 var
->blue
.offset
= 0;
1014 var
->blue
.length
= 8;
1015 var
->transp
.offset
= 24;
1016 var
->transp
.length
= 8;
1021 var
->bits_per_pixel
= bpp
;
1022 var
->red
.msb_right
= 0;
1023 var
->green
.msb_right
= 0;
1024 var
->blue
.msb_right
= 0;
1025 var
->transp
.msb_right
= 0;
1029 static int sh_mobile_lcdc_suspend(struct device
*dev
)
1031 struct platform_device
*pdev
= to_platform_device(dev
);
1033 sh_mobile_lcdc_stop(platform_get_drvdata(pdev
));
1037 static int sh_mobile_lcdc_resume(struct device
*dev
)
1039 struct platform_device
*pdev
= to_platform_device(dev
);
1041 return sh_mobile_lcdc_start(platform_get_drvdata(pdev
));
1044 static int sh_mobile_lcdc_runtime_suspend(struct device
*dev
)
1046 struct platform_device
*pdev
= to_platform_device(dev
);
1047 struct sh_mobile_lcdc_priv
*p
= platform_get_drvdata(pdev
);
1048 struct sh_mobile_lcdc_chan
*ch
;
1051 /* save per-channel registers */
1052 for (k
= 0; k
< ARRAY_SIZE(p
->ch
); k
++) {
1056 for (n
= 0; n
< NR_CH_REGS
; n
++)
1057 ch
->saved_ch_regs
[n
] = lcdc_read_chan(ch
, n
);
1060 /* save shared registers */
1061 for (n
= 0; n
< NR_SHARED_REGS
; n
++)
1062 p
->saved_shared_regs
[n
] = lcdc_read(p
, lcdc_shared_regs
[n
]);
1064 /* turn off LCDC hardware */
1065 lcdc_write(p
, _LDCNT1R
, 0);
1069 static int sh_mobile_lcdc_runtime_resume(struct device
*dev
)
1071 struct platform_device
*pdev
= to_platform_device(dev
);
1072 struct sh_mobile_lcdc_priv
*p
= platform_get_drvdata(pdev
);
1073 struct sh_mobile_lcdc_chan
*ch
;
1076 /* restore per-channel registers */
1077 for (k
= 0; k
< ARRAY_SIZE(p
->ch
); k
++) {
1081 for (n
= 0; n
< NR_CH_REGS
; n
++)
1082 lcdc_write_chan(ch
, n
, ch
->saved_ch_regs
[n
]);
1085 /* restore shared registers */
1086 for (n
= 0; n
< NR_SHARED_REGS
; n
++)
1087 lcdc_write(p
, lcdc_shared_regs
[n
], p
->saved_shared_regs
[n
]);
1092 static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops
= {
1093 .suspend
= sh_mobile_lcdc_suspend
,
1094 .resume
= sh_mobile_lcdc_resume
,
1095 .runtime_suspend
= sh_mobile_lcdc_runtime_suspend
,
1096 .runtime_resume
= sh_mobile_lcdc_runtime_resume
,
1099 /* locking: called with info->lock held */
1100 static int sh_mobile_lcdc_notify(struct notifier_block
*nb
,
1101 unsigned long action
, void *data
)
1103 struct fb_event
*event
= data
;
1104 struct fb_info
*info
= event
->info
;
1105 struct sh_mobile_lcdc_chan
*ch
= info
->par
;
1106 struct sh_mobile_lcdc_board_cfg
*board_cfg
= &ch
->cfg
.board_cfg
;
1109 if (&ch
->lcdc
->notifier
!= nb
)
1112 dev_dbg(info
->dev
, "%s(): action = %lu, data = %p\n",
1113 __func__
, action
, event
->data
);
1116 case FB_EVENT_SUSPEND
:
1117 if (try_module_get(board_cfg
->owner
) && board_cfg
->display_off
) {
1118 board_cfg
->display_off(board_cfg
->board_data
);
1119 module_put(board_cfg
->owner
);
1121 pm_runtime_put(info
->device
);
1122 sh_mobile_lcdc_stop(ch
->lcdc
);
1124 case FB_EVENT_RESUME
:
1125 mutex_lock(&ch
->open_lock
);
1126 sh_mobile_fb_reconfig(info
);
1127 mutex_unlock(&ch
->open_lock
);
1129 /* HDMI must be enabled before LCDC configuration */
1130 if (try_module_get(board_cfg
->owner
) && board_cfg
->display_on
) {
1131 board_cfg
->display_on(board_cfg
->board_data
, info
);
1132 module_put(board_cfg
->owner
);
1135 ret
= sh_mobile_lcdc_start(ch
->lcdc
);
1137 pm_runtime_get_sync(info
->device
);
1143 static int sh_mobile_lcdc_remove(struct platform_device
*pdev
);
1145 static int __devinit
sh_mobile_lcdc_probe(struct platform_device
*pdev
)
1147 struct fb_info
*info
;
1148 struct sh_mobile_lcdc_priv
*priv
;
1149 struct sh_mobile_lcdc_info
*pdata
= pdev
->dev
.platform_data
;
1150 struct resource
*res
;
1156 dev_err(&pdev
->dev
, "no platform data defined\n");
1160 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
1161 i
= platform_get_irq(pdev
, 0);
1162 if (!res
|| i
< 0) {
1163 dev_err(&pdev
->dev
, "cannot get platform resources\n");
1167 priv
= kzalloc(sizeof(*priv
), GFP_KERNEL
);
1169 dev_err(&pdev
->dev
, "cannot allocate device data\n");
1173 platform_set_drvdata(pdev
, priv
);
1175 error
= request_irq(i
, sh_mobile_lcdc_irq
, IRQF_DISABLED
,
1176 dev_name(&pdev
->dev
), priv
);
1178 dev_err(&pdev
->dev
, "unable to request irq\n");
1183 atomic_set(&priv
->hw_usecnt
, -1);
1186 for (i
= 0; i
< ARRAY_SIZE(pdata
->ch
); i
++) {
1187 struct sh_mobile_lcdc_chan
*ch
= priv
->ch
+ j
;
1190 memcpy(&ch
->cfg
, &pdata
->ch
[i
], sizeof(pdata
->ch
[i
]));
1192 error
= sh_mobile_lcdc_check_interface(ch
);
1194 dev_err(&pdev
->dev
, "unsupported interface type\n");
1197 init_waitqueue_head(&ch
->frame_end_wait
);
1198 init_completion(&ch
->vsync_completion
);
1201 switch (pdata
->ch
[i
].chan
) {
1202 case LCDC_CHAN_MAINLCD
:
1203 ch
->enabled
= 1 << 1;
1204 ch
->reg_offs
= lcdc_offs_mainlcd
;
1207 case LCDC_CHAN_SUBLCD
:
1208 ch
->enabled
= 1 << 2;
1209 ch
->reg_offs
= lcdc_offs_sublcd
;
1216 dev_err(&pdev
->dev
, "no channels defined\n");
1221 /* for dual channel LCDC (MAIN + SUB) force shared bpp setting */
1223 priv
->forced_bpp
= pdata
->ch
[0].bpp
;
1225 priv
->base
= ioremap_nocache(res
->start
, resource_size(res
));
1229 error
= sh_mobile_lcdc_setup_clocks(pdev
, pdata
->clock_source
, priv
);
1231 dev_err(&pdev
->dev
, "unable to setup clocks\n");
1235 for (i
= 0; i
< j
; i
++) {
1236 struct fb_var_screeninfo
*var
;
1237 const struct fb_videomode
*lcd_cfg
, *max_cfg
= NULL
;
1238 struct sh_mobile_lcdc_chan
*ch
= priv
->ch
+ i
;
1239 struct sh_mobile_lcdc_chan_cfg
*cfg
= &ch
->cfg
;
1240 const struct fb_videomode
*mode
= cfg
->lcd_cfg
;
1241 unsigned long max_size
= 0;
1245 ch
->info
= framebuffer_alloc(0, &pdev
->dev
);
1247 dev_err(&pdev
->dev
, "unable to allocate fb_info\n");
1254 info
->fbops
= &sh_mobile_lcdc_ops
;
1257 mutex_init(&ch
->open_lock
);
1259 for (k
= 0, lcd_cfg
= mode
;
1260 k
< cfg
->num_cfg
&& lcd_cfg
;
1262 unsigned long size
= lcd_cfg
->yres
* lcd_cfg
->xres
;
1264 if (size
> max_size
) {
1271 max_size
= MAX_XRES
* MAX_YRES
;
1273 dev_dbg(&pdev
->dev
, "Found largest videomode %ux%u\n",
1274 max_cfg
->xres
, max_cfg
->yres
);
1276 info
->fix
= sh_mobile_lcdc_fix
;
1277 info
->fix
.smem_len
= max_size
* (cfg
->bpp
/ 8) * 2;
1280 mode
= &default_720p
;
1283 num_cfg
= cfg
->num_cfg
;
1286 fb_videomode_to_modelist(mode
, num_cfg
, &info
->modelist
);
1288 fb_videomode_to_var(var
, mode
);
1289 var
->width
= cfg
->lcd_size_cfg
.width
;
1290 var
->height
= cfg
->lcd_size_cfg
.height
;
1291 /* Default Y virtual resolution is 2x panel size */
1292 var
->yres_virtual
= var
->yres
* 2;
1293 var
->activate
= FB_ACTIVATE_NOW
;
1295 error
= sh_mobile_lcdc_set_bpp(var
, cfg
->bpp
);
1299 buf
= dma_alloc_coherent(&pdev
->dev
, info
->fix
.smem_len
,
1300 &ch
->dma_handle
, GFP_KERNEL
);
1302 dev_err(&pdev
->dev
, "unable to allocate buffer\n");
1307 info
->pseudo_palette
= &ch
->pseudo_palette
;
1308 info
->flags
= FBINFO_FLAG_DEFAULT
;
1310 error
= fb_alloc_cmap(&info
->cmap
, PALETTE_NR
, 0);
1312 dev_err(&pdev
->dev
, "unable to allocate cmap\n");
1313 dma_free_coherent(&pdev
->dev
, info
->fix
.smem_len
,
1314 buf
, ch
->dma_handle
);
1318 info
->fix
.smem_start
= ch
->dma_handle
;
1319 info
->fix
.line_length
= var
->xres
* (cfg
->bpp
/ 8);
1320 info
->screen_base
= buf
;
1321 info
->device
= &pdev
->dev
;
1322 ch
->display_var
= *var
;
1328 error
= sh_mobile_lcdc_start(priv
);
1330 dev_err(&pdev
->dev
, "unable to start hardware\n");
1334 for (i
= 0; i
< j
; i
++) {
1335 struct sh_mobile_lcdc_chan
*ch
= priv
->ch
+ i
;
1339 if (info
->fbdefio
) {
1340 ch
->sglist
= vmalloc(sizeof(struct scatterlist
) *
1341 info
->fix
.smem_len
>> PAGE_SHIFT
);
1343 dev_err(&pdev
->dev
, "cannot allocate sglist\n");
1348 error
= register_framebuffer(info
);
1353 "registered %s/%s as %dx%d %dbpp.\n",
1355 (ch
->cfg
.chan
== LCDC_CHAN_MAINLCD
) ?
1356 "mainlcd" : "sublcd",
1357 info
->var
.xres
, info
->var
.yres
,
1360 /* deferred io mode: disable clock to save power */
1361 if (info
->fbdefio
|| info
->state
== FBINFO_STATE_SUSPENDED
)
1362 sh_mobile_lcdc_clk_off(priv
);
1365 /* Failure ignored */
1366 priv
->notifier
.notifier_call
= sh_mobile_lcdc_notify
;
1367 fb_register_client(&priv
->notifier
);
1371 sh_mobile_lcdc_remove(pdev
);
1376 static int sh_mobile_lcdc_remove(struct platform_device
*pdev
)
1378 struct sh_mobile_lcdc_priv
*priv
= platform_get_drvdata(pdev
);
1379 struct fb_info
*info
;
1382 fb_unregister_client(&priv
->notifier
);
1384 for (i
= 0; i
< ARRAY_SIZE(priv
->ch
); i
++)
1385 if (priv
->ch
[i
].info
&& priv
->ch
[i
].info
->dev
)
1386 unregister_framebuffer(priv
->ch
[i
].info
);
1388 sh_mobile_lcdc_stop(priv
);
1390 for (i
= 0; i
< ARRAY_SIZE(priv
->ch
); i
++) {
1391 info
= priv
->ch
[i
].info
;
1393 if (!info
|| !info
->device
)
1396 if (priv
->ch
[i
].sglist
)
1397 vfree(priv
->ch
[i
].sglist
);
1399 if (info
->screen_base
)
1400 dma_free_coherent(&pdev
->dev
, info
->fix
.smem_len
,
1402 priv
->ch
[i
].dma_handle
);
1403 fb_dealloc_cmap(&info
->cmap
);
1404 framebuffer_release(info
);
1408 clk_put(priv
->dot_clk
);
1411 pm_runtime_disable(priv
->dev
);
1414 iounmap(priv
->base
);
1417 free_irq(priv
->irq
, priv
);
1422 static struct platform_driver sh_mobile_lcdc_driver
= {
1424 .name
= "sh_mobile_lcdc_fb",
1425 .owner
= THIS_MODULE
,
1426 .pm
= &sh_mobile_lcdc_dev_pm_ops
,
1428 .probe
= sh_mobile_lcdc_probe
,
1429 .remove
= sh_mobile_lcdc_remove
,
1432 static int __init
sh_mobile_lcdc_init(void)
1434 return platform_driver_register(&sh_mobile_lcdc_driver
);
1437 static void __exit
sh_mobile_lcdc_exit(void)
1439 platform_driver_unregister(&sh_mobile_lcdc_driver
);
1442 module_init(sh_mobile_lcdc_init
);
1443 module_exit(sh_mobile_lcdc_exit
);
1445 MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
1446 MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
1447 MODULE_LICENSE("GPL v2");