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-rw-r--r--drivers/video/s3c2410fb.c130
1 files changed, 42 insertions, 88 deletions
diff --git a/drivers/video/s3c2410fb.c b/drivers/video/s3c2410fb.c
index 13b38cbbe4c..f0598961c6b 100644
--- a/drivers/video/s3c2410fb.c
+++ b/drivers/video/s3c2410fb.c
@@ -1,75 +1,15 @@
1/* 1/* linux/drivers/video/s3c2410fb.c
2 * linux/drivers/video/s3c2410fb.c 2 * Copyright (c) 2004,2005 Arnaud Patard
3 * Copyright (c) Arnaud Patard, Ben Dooks 3 * Copyright (c) 2004-2008 Ben Dooks
4 *
5 * S3C2410 LCD Framebuffer Driver
4 * 6 *
5 * This file is subject to the terms and conditions of the GNU General Public 7 * This file is subject to the terms and conditions of the GNU General Public
6 * License. See the file COPYING in the main directory of this archive for 8 * License. See the file COPYING in the main directory of this archive for
7 * more details. 9 * more details.
8 * 10 *
9 * S3C2410 LCD Controller Frame Buffer Driver 11 * Driver based on skeletonfb.c, sa1100fb.c and others.
10 * based on skeletonfb.c, sa1100fb.c and others 12*/
11 *
12 * ChangeLog
13 * 2005-04-07: Arnaud Patard <arnaud.patard@rtp-net.org>
14 * - u32 state -> pm_message_t state
15 * - S3C2410_{VA,SZ}_LCD -> S3C24XX
16 *
17 * 2005-03-15: Arnaud Patard <arnaud.patard@rtp-net.org>
18 * - Removed the ioctl
19 * - use readl/writel instead of __raw_writel/__raw_readl
20 *
21 * 2004-12-04: Arnaud Patard <arnaud.patard@rtp-net.org>
22 * - Added the possibility to set on or off the
23 * debugging messages
24 * - Replaced 0 and 1 by on or off when reading the
25 * /sys files
26 *
27 * 2005-03-23: Ben Dooks <ben-linux@fluff.org>
28 * - added non 16bpp modes
29 * - updated platform information for range of x/y/bpp
30 * - add code to ensure palette is written correctly
31 * - add pixel clock divisor control
32 *
33 * 2004-11-11: Arnaud Patard <arnaud.patard@rtp-net.org>
34 * - Removed the use of currcon as it no more exists
35 * - Added LCD power sysfs interface
36 *
37 * 2004-11-03: Ben Dooks <ben-linux@fluff.org>
38 * - minor cleanups
39 * - add suspend/resume support
40 * - s3c2410fb_setcolreg() not valid in >8bpp modes
41 * - removed last CONFIG_FB_S3C2410_FIXED
42 * - ensure lcd controller stopped before cleanup
43 * - added sysfs interface for backlight power
44 * - added mask for gpio configuration
45 * - ensured IRQs disabled during GPIO configuration
46 * - disable TPAL before enabling video
47 *
48 * 2004-09-20: Arnaud Patard <arnaud.patard@rtp-net.org>
49 * - Suppress command line options
50 *
51 * 2004-09-15: Arnaud Patard <arnaud.patard@rtp-net.org>
52 * - code cleanup
53 *
54 * 2004-09-07: Arnaud Patard <arnaud.patard@rtp-net.org>
55 * - Renamed from h1940fb.c to s3c2410fb.c
56 * - Add support for different devices
57 * - Backlight support
58 *
59 * 2004-09-05: Herbert Pötzl <herbert@13thfloor.at>
60 * - added clock (de-)allocation code
61 * - added fixem fbmem option
62 *
63 * 2004-07-27: Arnaud Patard <arnaud.patard@rtp-net.org>
64 * - code cleanup
65 * - added a forgotten return in h1940fb_init
66 *
67 * 2004-07-19: Herbert Pötzl <herbert@13thfloor.at>
68 * - code cleanup and extended debugging
69 *
70 * 2004-07-15: Arnaud Patard <arnaud.patard@rtp-net.org>
71 * - First version
72 */
73 13
74#include <linux/module.h> 14#include <linux/module.h>
75#include <linux/kernel.h> 15#include <linux/kernel.h>
@@ -580,6 +520,27 @@ static int s3c2410fb_setcolreg(unsigned regno,
580 return 0; 520 return 0;
581} 521}
582 522
523/* s3c2410fb_lcd_enable
524 *
525 * shutdown the lcd controller
526 */
527static void s3c2410fb_lcd_enable(struct s3c2410fb_info *fbi, int enable)
528{
529 unsigned long flags;
530
531 local_irq_save(flags);
532
533 if (enable)
534 fbi->regs.lcdcon1 |= S3C2410_LCDCON1_ENVID;
535 else
536 fbi->regs.lcdcon1 &= ~S3C2410_LCDCON1_ENVID;
537
538 writel(fbi->regs.lcdcon1, fbi->io + S3C2410_LCDCON1);
539
540 local_irq_restore(flags);
541}
542
543
583/* 544/*
584 * s3c2410fb_blank 545 * s3c2410fb_blank
585 * @blank_mode: the blank mode we want. 546 * @blank_mode: the blank mode we want.
@@ -589,9 +550,6 @@ static int s3c2410fb_setcolreg(unsigned regno,
589 * blanking succeeded, != 0 if un-/blanking failed due to e.g. a 550 * blanking succeeded, != 0 if un-/blanking failed due to e.g. a
590 * video mode which doesn't support it. Implements VESA suspend 551 * video mode which doesn't support it. Implements VESA suspend
591 * and powerdown modes on hardware that supports disabling hsync/vsync: 552 * and powerdown modes on hardware that supports disabling hsync/vsync:
592 * blank_mode == 2: suspend vsync
593 * blank_mode == 3: suspend hsync
594 * blank_mode == 4: powerdown
595 * 553 *
596 * Returns negative errno on error, or zero on success. 554 * Returns negative errno on error, or zero on success.
597 * 555 *
@@ -605,6 +563,12 @@ static int s3c2410fb_blank(int blank_mode, struct fb_info *info)
605 563
606 tpal_reg += is_s3c2412(fbi) ? S3C2412_TPAL : S3C2410_TPAL; 564 tpal_reg += is_s3c2412(fbi) ? S3C2412_TPAL : S3C2410_TPAL;
607 565
566 if (blank_mode == FB_BLANK_POWERDOWN) {
567 s3c2410fb_lcd_enable(fbi, 0);
568 } else {
569 s3c2410fb_lcd_enable(fbi, 1);
570 }
571
608 if (blank_mode == FB_BLANK_UNBLANK) 572 if (blank_mode == FB_BLANK_UNBLANK)
609 writel(0x0, tpal_reg); 573 writel(0x0, tpal_reg);
610 else { 574 else {
@@ -948,7 +912,10 @@ static int __init s3c24xxfb_probe(struct platform_device *pdev,
948 } 912 }
949 913
950 /* create device files */ 914 /* create device files */
951 device_create_file(&pdev->dev, &dev_attr_debug); 915 ret = device_create_file(&pdev->dev, &dev_attr_debug);
916 if (ret) {
917 printk(KERN_ERR "failed to add debug attribute\n");
918 }
952 919
953 printk(KERN_INFO "fb%d: %s frame buffer device\n", 920 printk(KERN_INFO "fb%d: %s frame buffer device\n",
954 fbinfo->node, fbinfo->fix.id); 921 fbinfo->node, fbinfo->fix.id);
@@ -983,21 +950,6 @@ static int __init s3c2412fb_probe(struct platform_device *pdev)
983 return s3c24xxfb_probe(pdev, DRV_S3C2412); 950 return s3c24xxfb_probe(pdev, DRV_S3C2412);
984} 951}
985 952
986/* s3c2410fb_stop_lcd
987 *
988 * shutdown the lcd controller
989 */
990static void s3c2410fb_stop_lcd(struct s3c2410fb_info *fbi)
991{
992 unsigned long flags;
993
994 local_irq_save(flags);
995
996 fbi->regs.lcdcon1 &= ~S3C2410_LCDCON1_ENVID;
997 writel(fbi->regs.lcdcon1, fbi->io + S3C2410_LCDCON1);
998
999 local_irq_restore(flags);
1000}
1001 953
1002/* 954/*
1003 * Cleanup 955 * Cleanup
@@ -1010,7 +962,7 @@ static int s3c2410fb_remove(struct platform_device *pdev)
1010 962
1011 unregister_framebuffer(fbinfo); 963 unregister_framebuffer(fbinfo);
1012 964
1013 s3c2410fb_stop_lcd(info); 965 s3c2410fb_lcd_enable(info, 0);
1014 msleep(1); 966 msleep(1);
1015 967
1016 s3c2410fb_unmap_video_memory(fbinfo); 968 s3c2410fb_unmap_video_memory(fbinfo);
@@ -1043,7 +995,7 @@ static int s3c2410fb_suspend(struct platform_device *dev, pm_message_t state)
1043 struct fb_info *fbinfo = platform_get_drvdata(dev); 995 struct fb_info *fbinfo = platform_get_drvdata(dev);
1044 struct s3c2410fb_info *info = fbinfo->par; 996 struct s3c2410fb_info *info = fbinfo->par;
1045 997
1046 s3c2410fb_stop_lcd(info); 998 s3c2410fb_lcd_enable(info, 0);
1047 999
1048 /* sleep before disabling the clock, we need to ensure 1000 /* sleep before disabling the clock, we need to ensure
1049 * the LCD DMA engine is not going to get back on the bus 1001 * the LCD DMA engine is not going to get back on the bus
@@ -1118,3 +1070,5 @@ MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>, "
1118 "Ben Dooks <ben-linux@fluff.org>"); 1070 "Ben Dooks <ben-linux@fluff.org>");
1119MODULE_DESCRIPTION("Framebuffer driver for the s3c2410"); 1071MODULE_DESCRIPTION("Framebuffer driver for the s3c2410");
1120MODULE_LICENSE("GPL"); 1072MODULE_LICENSE("GPL");
1073MODULE_ALIAS("platform:s3c2410-lcd");
1074MODULE_ALIAS("platform:s3c2412-lcd");