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authorIngo Molnar <mingo@elte.hu>2008-06-16 11:15:58 +0200
committerIngo Molnar <mingo@elte.hu>2008-06-16 11:15:58 +0200
commite765ee90da62535ac7d7a97f2464f9646539d683 (patch)
tree7a9cecce5aab958938e9a3bf46c2302d6af1958c /drivers/video/s3c2410fb.c
parenta4500b84c51645bbc86be3ca84f2252b7ada060f (diff)
parent066519068ad2fbe98c7f45552b1f592903a9c8c8 (diff)
Diffstat (limited to 'drivers/video/s3c2410fb.c')
-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 13b38cbbe4cf..f0598961c6b0 100644
--- a/drivers/video/s3c2410fb.c
+++ b/drivers/video/s3c2410fb.c
@@ -1,75 +1,15 @@
-/*
- * linux/drivers/video/s3c2410fb.c
- * Copyright (c) Arnaud Patard, Ben Dooks
+/* linux/drivers/video/s3c2410fb.c
+ * Copyright (c) 2004,2005 Arnaud Patard
+ * Copyright (c) 2004-2008 Ben Dooks
+ *
+ * S3C2410 LCD Framebuffer Driver
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive for
* more details.
*
- * S3C2410 LCD Controller Frame Buffer Driver
- * based on skeletonfb.c, sa1100fb.c and others
- *
- * ChangeLog
- * 2005-04-07: Arnaud Patard <arnaud.patard@rtp-net.org>
- * - u32 state -> pm_message_t state
- * - S3C2410_{VA,SZ}_LCD -> S3C24XX
- *
- * 2005-03-15: Arnaud Patard <arnaud.patard@rtp-net.org>
- * - Removed the ioctl
- * - use readl/writel instead of __raw_writel/__raw_readl
- *
- * 2004-12-04: Arnaud Patard <arnaud.patard@rtp-net.org>
- * - Added the possibility to set on or off the
- * debugging messages
- * - Replaced 0 and 1 by on or off when reading the
- * /sys files
- *
- * 2005-03-23: Ben Dooks <ben-linux@fluff.org>
- * - added non 16bpp modes
- * - updated platform information for range of x/y/bpp
- * - add code to ensure palette is written correctly
- * - add pixel clock divisor control
- *
- * 2004-11-11: Arnaud Patard <arnaud.patard@rtp-net.org>
- * - Removed the use of currcon as it no more exists
- * - Added LCD power sysfs interface
- *
- * 2004-11-03: Ben Dooks <ben-linux@fluff.org>
- * - minor cleanups
- * - add suspend/resume support
- * - s3c2410fb_setcolreg() not valid in >8bpp modes
- * - removed last CONFIG_FB_S3C2410_FIXED
- * - ensure lcd controller stopped before cleanup
- * - added sysfs interface for backlight power
- * - added mask for gpio configuration
- * - ensured IRQs disabled during GPIO configuration
- * - disable TPAL before enabling video
- *
- * 2004-09-20: Arnaud Patard <arnaud.patard@rtp-net.org>
- * - Suppress command line options
- *
- * 2004-09-15: Arnaud Patard <arnaud.patard@rtp-net.org>
- * - code cleanup
- *
- * 2004-09-07: Arnaud Patard <arnaud.patard@rtp-net.org>
- * - Renamed from h1940fb.c to s3c2410fb.c
- * - Add support for different devices
- * - Backlight support
- *
- * 2004-09-05: Herbert Pötzl <herbert@13thfloor.at>
- * - added clock (de-)allocation code
- * - added fixem fbmem option
- *
- * 2004-07-27: Arnaud Patard <arnaud.patard@rtp-net.org>
- * - code cleanup
- * - added a forgotten return in h1940fb_init
- *
- * 2004-07-19: Herbert Pötzl <herbert@13thfloor.at>
- * - code cleanup and extended debugging
- *
- * 2004-07-15: Arnaud Patard <arnaud.patard@rtp-net.org>
- * - First version
- */
+ * Driver based on skeletonfb.c, sa1100fb.c and others.
+*/
#include <linux/module.h>
#include <linux/kernel.h>
@@ -580,6 +520,27 @@ static int s3c2410fb_setcolreg(unsigned regno,
return 0;
}
+/* s3c2410fb_lcd_enable
+ *
+ * shutdown the lcd controller
+ */
+static void s3c2410fb_lcd_enable(struct s3c2410fb_info *fbi, int enable)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+
+ if (enable)
+ fbi->regs.lcdcon1 |= S3C2410_LCDCON1_ENVID;
+ else
+ fbi->regs.lcdcon1 &= ~S3C2410_LCDCON1_ENVID;
+
+ writel(fbi->regs.lcdcon1, fbi->io + S3C2410_LCDCON1);
+
+ local_irq_restore(flags);
+}
+
+
/*
* s3c2410fb_blank
* @blank_mode: the blank mode we want.
@@ -589,9 +550,6 @@ static int s3c2410fb_setcolreg(unsigned regno,
* blanking succeeded, != 0 if un-/blanking failed due to e.g. a
* video mode which doesn't support it. Implements VESA suspend
* and powerdown modes on hardware that supports disabling hsync/vsync:
- * blank_mode == 2: suspend vsync
- * blank_mode == 3: suspend hsync
- * blank_mode == 4: powerdown
*
* Returns negative errno on error, or zero on success.
*
@@ -605,6 +563,12 @@ static int s3c2410fb_blank(int blank_mode, struct fb_info *info)
tpal_reg += is_s3c2412(fbi) ? S3C2412_TPAL : S3C2410_TPAL;
+ if (blank_mode == FB_BLANK_POWERDOWN) {
+ s3c2410fb_lcd_enable(fbi, 0);
+ } else {
+ s3c2410fb_lcd_enable(fbi, 1);
+ }
+
if (blank_mode == FB_BLANK_UNBLANK)
writel(0x0, tpal_reg);
else {
@@ -948,7 +912,10 @@ static int __init s3c24xxfb_probe(struct platform_device *pdev,
}
/* create device files */
- device_create_file(&pdev->dev, &dev_attr_debug);
+ ret = device_create_file(&pdev->dev, &dev_attr_debug);
+ if (ret) {
+ printk(KERN_ERR "failed to add debug attribute\n");
+ }
printk(KERN_INFO "fb%d: %s frame buffer device\n",
fbinfo->node, fbinfo->fix.id);
@@ -983,21 +950,6 @@ static int __init s3c2412fb_probe(struct platform_device *pdev)
return s3c24xxfb_probe(pdev, DRV_S3C2412);
}
-/* s3c2410fb_stop_lcd
- *
- * shutdown the lcd controller
- */
-static void s3c2410fb_stop_lcd(struct s3c2410fb_info *fbi)
-{
- unsigned long flags;
-
- local_irq_save(flags);
-
- fbi->regs.lcdcon1 &= ~S3C2410_LCDCON1_ENVID;
- writel(fbi->regs.lcdcon1, fbi->io + S3C2410_LCDCON1);
-
- local_irq_restore(flags);
-}
/*
* Cleanup
@@ -1010,7 +962,7 @@ static int s3c2410fb_remove(struct platform_device *pdev)
unregister_framebuffer(fbinfo);
- s3c2410fb_stop_lcd(info);
+ s3c2410fb_lcd_enable(info, 0);
msleep(1);
s3c2410fb_unmap_video_memory(fbinfo);
@@ -1043,7 +995,7 @@ static int s3c2410fb_suspend(struct platform_device *dev, pm_message_t state)
struct fb_info *fbinfo = platform_get_drvdata(dev);
struct s3c2410fb_info *info = fbinfo->par;
- s3c2410fb_stop_lcd(info);
+ s3c2410fb_lcd_enable(info, 0);
/* sleep before disabling the clock, we need to ensure
* 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>, "
"Ben Dooks <ben-linux@fluff.org>");
MODULE_DESCRIPTION("Framebuffer driver for the s3c2410");
MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:s3c2410-lcd");
+MODULE_ALIAS("platform:s3c2412-lcd");