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0187f221e9
The current driver is not setting the dev field in the private data structure, which can lead to an OOPS if the driver tries to report an error. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Cc: James Simmons <jsimmons@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1038 lines
26 KiB
C
1038 lines
26 KiB
C
/*
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* linux/drivers/video/s3c2410fb.c
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* Copyright (c) Arnaud Patard, Ben Dooks
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive for
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* more details.
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*
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* S3C2410 LCD Controller Frame Buffer Driver
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* based on skeletonfb.c, sa1100fb.c and others
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*
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* ChangeLog
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* 2005-04-07: Arnaud Patard <arnaud.patard@rtp-net.org>
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* - u32 state -> pm_message_t state
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* - S3C2410_{VA,SZ}_LCD -> S3C24XX
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*
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* 2005-03-15: Arnaud Patard <arnaud.patard@rtp-net.org>
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* - Removed the ioctl
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* - use readl/writel instead of __raw_writel/__raw_readl
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*
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* 2004-12-04: Arnaud Patard <arnaud.patard@rtp-net.org>
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* - Added the possibility to set on or off the
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* debugging mesaages
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* - Replaced 0 and 1 by on or off when reading the
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* /sys files
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*
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* 2005-03-23: Ben Dooks <ben-linux@fluff.org>
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* - added non 16bpp modes
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* - updated platform information for range of x/y/bpp
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* - add code to ensure palette is written correctly
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* - add pixel clock divisor control
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*
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* 2004-11-11: Arnaud Patard <arnaud.patard@rtp-net.org>
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* - Removed the use of currcon as it no more exist
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* - Added LCD power sysfs interface
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*
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* 2004-11-03: Ben Dooks <ben-linux@fluff.org>
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* - minor cleanups
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* - add suspend/resume support
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* - s3c2410fb_setcolreg() not valid in >8bpp modes
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* - removed last CONFIG_FB_S3C2410_FIXED
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* - ensure lcd controller stopped before cleanup
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* - added sysfs interface for backlight power
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* - added mask for gpio configuration
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* - ensured IRQs disabled during GPIO configuration
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* - disable TPAL before enabling video
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*
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* 2004-09-20: Arnaud Patard <arnaud.patard@rtp-net.org>
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* - Suppress command line options
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*
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* 2004-09-15: Arnaud Patard <arnaud.patard@rtp-net.org>
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* - code cleanup
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*
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* 2004-09-07: Arnaud Patard <arnaud.patard@rtp-net.org>
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* - Renamed from h1940fb.c to s3c2410fb.c
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* - Add support for different devices
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* - Backlight support
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*
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* 2004-09-05: Herbert P<>tzl <herbert@13thfloor.at>
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* - added clock (de-)allocation code
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* - added fixem fbmem option
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*
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* 2004-07-27: Arnaud Patard <arnaud.patard@rtp-net.org>
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* - code cleanup
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* - added a forgotten return in h1940fb_init
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*
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* 2004-07-19: Herbert P<>tzl <herbert@13thfloor.at>
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* - code cleanup and extended debugging
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*
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* 2004-07-15: Arnaud Patard <arnaud.patard@rtp-net.org>
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* - First version
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/fb.h>
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#include <linux/init.h>
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#include <linux/dma-mapping.h>
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#include <linux/interrupt.h>
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#include <linux/workqueue.h>
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#include <linux/wait.h>
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#include <linux/platform_device.h>
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#include <linux/clk.h>
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#include <asm/io.h>
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#include <asm/uaccess.h>
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#include <asm/div64.h>
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#include <asm/mach/map.h>
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#include <asm/arch/regs-lcd.h>
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#include <asm/arch/regs-gpio.h>
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#include <asm/arch/fb.h>
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#ifdef CONFIG_PM
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#include <linux/pm.h>
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#endif
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#include "s3c2410fb.h"
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static struct s3c2410fb_mach_info *mach_info;
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/* Debugging stuff */
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#ifdef CONFIG_FB_S3C2410_DEBUG
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static int debug = 1;
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#else
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static int debug = 0;
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#endif
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#define dprintk(msg...) if (debug) { printk(KERN_DEBUG "s3c2410fb: " msg); }
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/* useful functions */
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/* s3c2410fb_set_lcdaddr
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*
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* initialise lcd controller address pointers
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*/
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static void s3c2410fb_set_lcdaddr(struct s3c2410fb_info *fbi)
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{
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struct fb_var_screeninfo *var = &fbi->fb->var;
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unsigned long saddr1, saddr2, saddr3;
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saddr1 = fbi->fb->fix.smem_start >> 1;
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saddr2 = fbi->fb->fix.smem_start;
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saddr2 += (var->xres * var->yres * var->bits_per_pixel)/8;
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saddr2>>= 1;
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saddr3 = S3C2410_OFFSIZE(0) | S3C2410_PAGEWIDTH((var->xres * var->bits_per_pixel / 16) & 0x3ff);
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dprintk("LCDSADDR1 = 0x%08lx\n", saddr1);
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dprintk("LCDSADDR2 = 0x%08lx\n", saddr2);
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dprintk("LCDSADDR3 = 0x%08lx\n", saddr3);
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writel(saddr1, S3C2410_LCDSADDR1);
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writel(saddr2, S3C2410_LCDSADDR2);
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writel(saddr3, S3C2410_LCDSADDR3);
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}
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/* s3c2410fb_calc_pixclk()
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*
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* calculate divisor for clk->pixclk
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*/
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static unsigned int s3c2410fb_calc_pixclk(struct s3c2410fb_info *fbi,
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unsigned long pixclk)
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{
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unsigned long clk = clk_get_rate(fbi->clk);
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unsigned long long div;
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/* pixclk is in picoseoncds, our clock is in Hz
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*
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* Hz -> picoseconds is / 10^-12
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*/
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div = (unsigned long long)clk * pixclk;
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do_div(div,1000000UL);
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do_div(div,1000000UL);
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dprintk("pixclk %ld, divisor is %ld\n", pixclk, (long)div);
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return div;
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}
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/*
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* s3c2410fb_check_var():
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* Get the video params out of 'var'. If a value doesn't fit, round it up,
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* if it's too big, return -EINVAL.
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*
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*/
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static int s3c2410fb_check_var(struct fb_var_screeninfo *var,
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struct fb_info *info)
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{
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struct s3c2410fb_info *fbi = info->par;
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dprintk("check_var(var=%p, info=%p)\n", var, info);
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/* validate x/y resolution */
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if (var->yres > fbi->mach_info->yres.max)
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var->yres = fbi->mach_info->yres.max;
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else if (var->yres < fbi->mach_info->yres.min)
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var->yres = fbi->mach_info->yres.min;
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if (var->xres > fbi->mach_info->xres.max)
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var->yres = fbi->mach_info->xres.max;
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else if (var->xres < fbi->mach_info->xres.min)
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var->xres = fbi->mach_info->xres.min;
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/* validate bpp */
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if (var->bits_per_pixel > fbi->mach_info->bpp.max)
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var->bits_per_pixel = fbi->mach_info->bpp.max;
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else if (var->bits_per_pixel < fbi->mach_info->bpp.min)
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var->bits_per_pixel = fbi->mach_info->bpp.min;
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/* set r/g/b positions */
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switch (var->bits_per_pixel) {
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case 1:
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case 2:
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case 4:
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var->red.offset = 0;
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var->red.length = var->bits_per_pixel;
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var->green = var->red;
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var->blue = var->red;
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var->transp.offset = 0;
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var->transp.length = 0;
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break;
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case 8:
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if ( fbi->mach_info->type != S3C2410_LCDCON1_TFT ) {
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/* 8 bpp 332 */
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var->red.length = 3;
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var->red.offset = 5;
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var->green.length = 3;
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var->green.offset = 2;
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var->blue.length = 2;
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var->blue.offset = 0;
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var->transp.length = 0;
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} else {
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var->red.offset = 0;
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var->red.length = var->bits_per_pixel;
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var->green = var->red;
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var->blue = var->red;
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var->transp.offset = 0;
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var->transp.length = 0;
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}
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break;
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case 12:
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/* 12 bpp 444 */
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var->red.length = 4;
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var->red.offset = 8;
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var->green.length = 4;
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var->green.offset = 4;
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var->blue.length = 4;
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var->blue.offset = 0;
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var->transp.length = 0;
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break;
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default:
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case 16:
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if (fbi->regs.lcdcon5 & S3C2410_LCDCON5_FRM565 ) {
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/* 16 bpp, 565 format */
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var->red.offset = 11;
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var->green.offset = 5;
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var->blue.offset = 0;
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var->red.length = 5;
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var->green.length = 6;
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var->blue.length = 5;
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var->transp.length = 0;
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} else {
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/* 16 bpp, 5551 format */
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var->red.offset = 11;
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var->green.offset = 6;
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var->blue.offset = 1;
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var->red.length = 5;
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var->green.length = 5;
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var->blue.length = 5;
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var->transp.length = 0;
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}
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break;
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case 24:
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/* 24 bpp 888 */
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var->red.length = 8;
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var->red.offset = 16;
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var->green.length = 8;
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var->green.offset = 8;
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var->blue.length = 8;
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var->blue.offset = 0;
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var->transp.length = 0;
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break;
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}
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return 0;
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}
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/* s3c2410fb_activate_var
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*
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* activate (set) the controller from the given framebuffer
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* information
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*/
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static void s3c2410fb_activate_var(struct s3c2410fb_info *fbi,
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struct fb_var_screeninfo *var)
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{
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int hs;
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fbi->regs.lcdcon1 &= ~S3C2410_LCDCON1_MODEMASK;
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fbi->regs.lcdcon1 &= ~S3C2410_LCDCON1_TFT;
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dprintk("%s: var->xres = %d\n", __FUNCTION__, var->xres);
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dprintk("%s: var->yres = %d\n", __FUNCTION__, var->yres);
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dprintk("%s: var->bpp = %d\n", __FUNCTION__, var->bits_per_pixel);
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fbi->regs.lcdcon1 |= fbi->mach_info->type;
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if (fbi->mach_info->type == S3C2410_LCDCON1_TFT)
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switch (var->bits_per_pixel) {
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case 1:
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fbi->regs.lcdcon1 |= S3C2410_LCDCON1_TFT1BPP;
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break;
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case 2:
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fbi->regs.lcdcon1 |= S3C2410_LCDCON1_TFT2BPP;
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break;
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case 4:
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fbi->regs.lcdcon1 |= S3C2410_LCDCON1_TFT4BPP;
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break;
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case 8:
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fbi->regs.lcdcon1 |= S3C2410_LCDCON1_TFT8BPP;
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break;
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case 16:
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fbi->regs.lcdcon1 |= S3C2410_LCDCON1_TFT16BPP;
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break;
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default:
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/* invalid pixel depth */
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dev_err(fbi->dev, "invalid bpp %d\n", var->bits_per_pixel);
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}
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else
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switch (var->bits_per_pixel) {
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case 1:
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fbi->regs.lcdcon1 |= S3C2410_LCDCON1_STN1BPP;
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break;
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case 2:
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fbi->regs.lcdcon1 |= S3C2410_LCDCON1_STN2GREY;
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break;
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case 4:
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fbi->regs.lcdcon1 |= S3C2410_LCDCON1_STN4GREY;
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break;
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case 8:
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fbi->regs.lcdcon1 |= S3C2410_LCDCON1_STN8BPP;
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break;
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case 12:
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fbi->regs.lcdcon1 |= S3C2410_LCDCON1_STN12BPP;
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break;
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default:
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/* invalid pixel depth */
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dev_err(fbi->dev, "invalid bpp %d\n", var->bits_per_pixel);
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}
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/* check to see if we need to update sync/borders */
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if (!fbi->mach_info->fixed_syncs) {
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dprintk("setting vert: up=%d, low=%d, sync=%d\n",
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var->upper_margin, var->lower_margin,
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var->vsync_len);
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dprintk("setting horz: lft=%d, rt=%d, sync=%d\n",
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var->left_margin, var->right_margin,
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var->hsync_len);
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fbi->regs.lcdcon2 =
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S3C2410_LCDCON2_VBPD(var->upper_margin - 1) |
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S3C2410_LCDCON2_VFPD(var->lower_margin - 1) |
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S3C2410_LCDCON2_VSPW(var->vsync_len - 1);
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fbi->regs.lcdcon3 =
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S3C2410_LCDCON3_HBPD(var->right_margin - 1) |
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S3C2410_LCDCON3_HFPD(var->left_margin - 1);
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fbi->regs.lcdcon4 &= ~S3C2410_LCDCON4_HSPW(0xff);
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fbi->regs.lcdcon4 |= S3C2410_LCDCON4_HSPW(var->hsync_len - 1);
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}
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/* update X/Y info */
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fbi->regs.lcdcon2 &= ~S3C2410_LCDCON2_LINEVAL(0x3ff);
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fbi->regs.lcdcon2 |= S3C2410_LCDCON2_LINEVAL(var->yres - 1);
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switch(fbi->mach_info->type) {
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case S3C2410_LCDCON1_DSCAN4:
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case S3C2410_LCDCON1_STN8:
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hs = var->xres / 8;
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break;
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case S3C2410_LCDCON1_STN4:
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hs = var->xres / 4;
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break;
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default:
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case S3C2410_LCDCON1_TFT:
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hs = var->xres;
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break;
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}
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/* Special cases : STN color displays */
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if ( ((fbi->regs.lcdcon1 & S3C2410_LCDCON1_MODEMASK) == S3C2410_LCDCON1_STN8BPP) \
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|| ((fbi->regs.lcdcon1 & S3C2410_LCDCON1_MODEMASK) == S3C2410_LCDCON1_STN12BPP) ) {
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hs = hs * 3;
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}
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fbi->regs.lcdcon3 &= ~S3C2410_LCDCON3_HOZVAL(0x7ff);
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fbi->regs.lcdcon3 |= S3C2410_LCDCON3_HOZVAL(hs - 1);
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if (var->pixclock > 0) {
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int clkdiv = s3c2410fb_calc_pixclk(fbi, var->pixclock);
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if (fbi->mach_info->type == S3C2410_LCDCON1_TFT) {
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clkdiv = (clkdiv / 2) -1;
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if (clkdiv < 0)
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clkdiv = 0;
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}
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else {
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clkdiv = (clkdiv / 2);
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if (clkdiv < 2)
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clkdiv = 2;
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}
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fbi->regs.lcdcon1 &= ~S3C2410_LCDCON1_CLKVAL(0x3ff);
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fbi->regs.lcdcon1 |= S3C2410_LCDCON1_CLKVAL(clkdiv);
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}
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/* write new registers */
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dprintk("new register set:\n");
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dprintk("lcdcon[1] = 0x%08lx\n", fbi->regs.lcdcon1);
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dprintk("lcdcon[2] = 0x%08lx\n", fbi->regs.lcdcon2);
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dprintk("lcdcon[3] = 0x%08lx\n", fbi->regs.lcdcon3);
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dprintk("lcdcon[4] = 0x%08lx\n", fbi->regs.lcdcon4);
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dprintk("lcdcon[5] = 0x%08lx\n", fbi->regs.lcdcon5);
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writel(fbi->regs.lcdcon1 & ~S3C2410_LCDCON1_ENVID, S3C2410_LCDCON1);
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writel(fbi->regs.lcdcon2, S3C2410_LCDCON2);
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writel(fbi->regs.lcdcon3, S3C2410_LCDCON3);
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writel(fbi->regs.lcdcon4, S3C2410_LCDCON4);
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writel(fbi->regs.lcdcon5, S3C2410_LCDCON5);
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/* set lcd address pointers */
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s3c2410fb_set_lcdaddr(fbi);
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writel(fbi->regs.lcdcon1, S3C2410_LCDCON1);
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}
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/*
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* s3c2410fb_set_par - Optional function. Alters the hardware state.
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* @info: frame buffer structure that represents a single frame buffer
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*
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*/
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static int s3c2410fb_set_par(struct fb_info *info)
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{
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struct s3c2410fb_info *fbi = info->par;
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struct fb_var_screeninfo *var = &info->var;
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switch (var->bits_per_pixel)
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{
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case 16:
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fbi->fb->fix.visual = FB_VISUAL_TRUECOLOR;
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break;
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case 1:
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fbi->fb->fix.visual = FB_VISUAL_MONO01;
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break;
|
||
default:
|
||
fbi->fb->fix.visual = FB_VISUAL_PSEUDOCOLOR;
|
||
break;
|
||
}
|
||
|
||
fbi->fb->fix.line_length = (var->width*var->bits_per_pixel)/8;
|
||
|
||
/* activate this new configuration */
|
||
|
||
s3c2410fb_activate_var(fbi, var);
|
||
return 0;
|
||
}
|
||
|
||
static void schedule_palette_update(struct s3c2410fb_info *fbi,
|
||
unsigned int regno, unsigned int val)
|
||
{
|
||
unsigned long flags;
|
||
unsigned long irqen;
|
||
|
||
local_irq_save(flags);
|
||
|
||
fbi->palette_buffer[regno] = val;
|
||
|
||
if (!fbi->palette_ready) {
|
||
fbi->palette_ready = 1;
|
||
|
||
/* enable IRQ */
|
||
irqen = readl(S3C2410_LCDINTMSK);
|
||
irqen &= ~S3C2410_LCDINT_FRSYNC;
|
||
writel(irqen, S3C2410_LCDINTMSK);
|
||
}
|
||
|
||
local_irq_restore(flags);
|
||
}
|
||
|
||
/* from pxafb.c */
|
||
static inline unsigned int chan_to_field(unsigned int chan, struct fb_bitfield *bf)
|
||
{
|
||
chan &= 0xffff;
|
||
chan >>= 16 - bf->length;
|
||
return chan << bf->offset;
|
||
}
|
||
|
||
static int s3c2410fb_setcolreg(unsigned regno,
|
||
unsigned red, unsigned green, unsigned blue,
|
||
unsigned transp, struct fb_info *info)
|
||
{
|
||
struct s3c2410fb_info *fbi = info->par;
|
||
unsigned int val;
|
||
|
||
/* dprintk("setcol: regno=%d, rgb=%d,%d,%d\n", regno, red, green, blue); */
|
||
|
||
switch (fbi->fb->fix.visual) {
|
||
case FB_VISUAL_TRUECOLOR:
|
||
/* true-colour, use pseuo-palette */
|
||
|
||
if (regno < 16) {
|
||
u32 *pal = fbi->fb->pseudo_palette;
|
||
|
||
val = chan_to_field(red, &fbi->fb->var.red);
|
||
val |= chan_to_field(green, &fbi->fb->var.green);
|
||
val |= chan_to_field(blue, &fbi->fb->var.blue);
|
||
|
||
pal[regno] = val;
|
||
}
|
||
break;
|
||
|
||
case FB_VISUAL_PSEUDOCOLOR:
|
||
if (regno < 256) {
|
||
/* currently assume RGB 5-6-5 mode */
|
||
|
||
val = ((red >> 0) & 0xf800);
|
||
val |= ((green >> 5) & 0x07e0);
|
||
val |= ((blue >> 11) & 0x001f);
|
||
|
||
writel(val, S3C2410_TFTPAL(regno));
|
||
schedule_palette_update(fbi, regno, val);
|
||
}
|
||
|
||
break;
|
||
|
||
default:
|
||
return 1; /* unknown type */
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
/**
|
||
* s3c2410fb_blank
|
||
* @blank_mode: the blank mode we want.
|
||
* @info: frame buffer structure that represents a single frame buffer
|
||
*
|
||
* Blank the screen if blank_mode != 0, else unblank. Return 0 if
|
||
* 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.
|
||
*
|
||
*/
|
||
static int s3c2410fb_blank(int blank_mode, struct fb_info *info)
|
||
{
|
||
dprintk("blank(mode=%d, info=%p)\n", blank_mode, info);
|
||
|
||
if (mach_info == NULL)
|
||
return -EINVAL;
|
||
|
||
if (blank_mode == FB_BLANK_UNBLANK)
|
||
writel(0x0, S3C2410_TPAL);
|
||
else {
|
||
dprintk("setting TPAL to output 0x000000\n");
|
||
writel(S3C2410_TPAL_EN, S3C2410_TPAL);
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int s3c2410fb_debug_show(struct device *dev, struct device_attribute *attr, char *buf)
|
||
{
|
||
return snprintf(buf, PAGE_SIZE, "%s\n", debug ? "on" : "off");
|
||
}
|
||
static int s3c2410fb_debug_store(struct device *dev, struct device_attribute *attr,
|
||
const char *buf, size_t len)
|
||
{
|
||
if (mach_info == NULL)
|
||
return -EINVAL;
|
||
|
||
if (len < 1)
|
||
return -EINVAL;
|
||
|
||
if (strnicmp(buf, "on", 2) == 0 ||
|
||
strnicmp(buf, "1", 1) == 0) {
|
||
debug = 1;
|
||
printk(KERN_DEBUG "s3c2410fb: Debug On");
|
||
} else if (strnicmp(buf, "off", 3) == 0 ||
|
||
strnicmp(buf, "0", 1) == 0) {
|
||
debug = 0;
|
||
printk(KERN_DEBUG "s3c2410fb: Debug Off");
|
||
} else {
|
||
return -EINVAL;
|
||
}
|
||
|
||
return len;
|
||
}
|
||
|
||
|
||
static DEVICE_ATTR(debug, 0666,
|
||
s3c2410fb_debug_show,
|
||
s3c2410fb_debug_store);
|
||
|
||
static struct fb_ops s3c2410fb_ops = {
|
||
.owner = THIS_MODULE,
|
||
.fb_check_var = s3c2410fb_check_var,
|
||
.fb_set_par = s3c2410fb_set_par,
|
||
.fb_blank = s3c2410fb_blank,
|
||
.fb_setcolreg = s3c2410fb_setcolreg,
|
||
.fb_fillrect = cfb_fillrect,
|
||
.fb_copyarea = cfb_copyarea,
|
||
.fb_imageblit = cfb_imageblit,
|
||
};
|
||
|
||
|
||
/*
|
||
* s3c2410fb_map_video_memory():
|
||
* Allocates the DRAM memory for the frame buffer. This buffer is
|
||
* remapped into a non-cached, non-buffered, memory region to
|
||
* allow palette and pixel writes to occur without flushing the
|
||
* cache. Once this area is remapped, all virtual memory
|
||
* access to the video memory should occur at the new region.
|
||
*/
|
||
static int __init s3c2410fb_map_video_memory(struct s3c2410fb_info *fbi)
|
||
{
|
||
dprintk("map_video_memory(fbi=%p)\n", fbi);
|
||
|
||
fbi->map_size = PAGE_ALIGN(fbi->fb->fix.smem_len + PAGE_SIZE);
|
||
fbi->map_cpu = dma_alloc_writecombine(fbi->dev, fbi->map_size,
|
||
&fbi->map_dma, GFP_KERNEL);
|
||
|
||
fbi->map_size = fbi->fb->fix.smem_len;
|
||
|
||
if (fbi->map_cpu) {
|
||
/* prevent initial garbage on screen */
|
||
dprintk("map_video_memory: clear %p:%08x\n",
|
||
fbi->map_cpu, fbi->map_size);
|
||
memset(fbi->map_cpu, 0xf0, fbi->map_size);
|
||
|
||
fbi->screen_dma = fbi->map_dma;
|
||
fbi->fb->screen_base = fbi->map_cpu;
|
||
fbi->fb->fix.smem_start = fbi->screen_dma;
|
||
|
||
dprintk("map_video_memory: dma=%08x cpu=%p size=%08x\n",
|
||
fbi->map_dma, fbi->map_cpu, fbi->fb->fix.smem_len);
|
||
}
|
||
|
||
return fbi->map_cpu ? 0 : -ENOMEM;
|
||
}
|
||
|
||
static inline void s3c2410fb_unmap_video_memory(struct s3c2410fb_info *fbi)
|
||
{
|
||
dma_free_writecombine(fbi->dev,fbi->map_size,fbi->map_cpu, fbi->map_dma);
|
||
}
|
||
|
||
static inline void modify_gpio(void __iomem *reg,
|
||
unsigned long set, unsigned long mask)
|
||
{
|
||
unsigned long tmp;
|
||
|
||
tmp = readl(reg) & ~mask;
|
||
writel(tmp | set, reg);
|
||
}
|
||
|
||
|
||
/*
|
||
* s3c2410fb_init_registers - Initialise all LCD-related registers
|
||
*/
|
||
|
||
static int s3c2410fb_init_registers(struct s3c2410fb_info *fbi)
|
||
{
|
||
unsigned long flags;
|
||
|
||
/* Initialise LCD with values from haret */
|
||
|
||
local_irq_save(flags);
|
||
|
||
/* modify the gpio(s) with interrupts set (bjd) */
|
||
|
||
modify_gpio(S3C2410_GPCUP, mach_info->gpcup, mach_info->gpcup_mask);
|
||
modify_gpio(S3C2410_GPCCON, mach_info->gpccon, mach_info->gpccon_mask);
|
||
modify_gpio(S3C2410_GPDUP, mach_info->gpdup, mach_info->gpdup_mask);
|
||
modify_gpio(S3C2410_GPDCON, mach_info->gpdcon, mach_info->gpdcon_mask);
|
||
|
||
local_irq_restore(flags);
|
||
|
||
writel(fbi->regs.lcdcon1, S3C2410_LCDCON1);
|
||
writel(fbi->regs.lcdcon2, S3C2410_LCDCON2);
|
||
writel(fbi->regs.lcdcon3, S3C2410_LCDCON3);
|
||
writel(fbi->regs.lcdcon4, S3C2410_LCDCON4);
|
||
writel(fbi->regs.lcdcon5, S3C2410_LCDCON5);
|
||
|
||
s3c2410fb_set_lcdaddr(fbi);
|
||
|
||
dprintk("LPCSEL = 0x%08lx\n", mach_info->lpcsel);
|
||
writel(mach_info->lpcsel, S3C2410_LPCSEL);
|
||
|
||
dprintk("replacing TPAL %08x\n", readl(S3C2410_TPAL));
|
||
|
||
/* ensure temporary palette disabled */
|
||
writel(0x00, S3C2410_TPAL);
|
||
|
||
/* Enable video by setting the ENVID bit to 1 */
|
||
fbi->regs.lcdcon1 |= S3C2410_LCDCON1_ENVID;
|
||
writel(fbi->regs.lcdcon1, S3C2410_LCDCON1);
|
||
return 0;
|
||
}
|
||
|
||
static void s3c2410fb_write_palette(struct s3c2410fb_info *fbi)
|
||
{
|
||
unsigned int i;
|
||
unsigned long ent;
|
||
|
||
fbi->palette_ready = 0;
|
||
|
||
for (i = 0; i < 256; i++) {
|
||
if ((ent = fbi->palette_buffer[i]) == PALETTE_BUFF_CLEAR)
|
||
continue;
|
||
|
||
writel(ent, S3C2410_TFTPAL(i));
|
||
|
||
/* it seems the only way to know exactly
|
||
* if the palette wrote ok, is to check
|
||
* to see if the value verifies ok
|
||
*/
|
||
|
||
if (readw(S3C2410_TFTPAL(i)) == ent)
|
||
fbi->palette_buffer[i] = PALETTE_BUFF_CLEAR;
|
||
else
|
||
fbi->palette_ready = 1; /* retry */
|
||
}
|
||
}
|
||
|
||
static irqreturn_t s3c2410fb_irq(int irq, void *dev_id)
|
||
{
|
||
struct s3c2410fb_info *fbi = dev_id;
|
||
unsigned long lcdirq = readl(S3C2410_LCDINTPND);
|
||
|
||
if (lcdirq & S3C2410_LCDINT_FRSYNC) {
|
||
if (fbi->palette_ready)
|
||
s3c2410fb_write_palette(fbi);
|
||
|
||
writel(S3C2410_LCDINT_FRSYNC, S3C2410_LCDINTPND);
|
||
writel(S3C2410_LCDINT_FRSYNC, S3C2410_LCDSRCPND);
|
||
}
|
||
|
||
return IRQ_HANDLED;
|
||
}
|
||
|
||
static char driver_name[]="s3c2410fb";
|
||
|
||
static int __init s3c2410fb_probe(struct platform_device *pdev)
|
||
{
|
||
struct s3c2410fb_info *info;
|
||
struct fb_info *fbinfo;
|
||
struct s3c2410fb_hw *mregs;
|
||
int ret;
|
||
int irq;
|
||
int i;
|
||
u32 lcdcon1;
|
||
|
||
mach_info = pdev->dev.platform_data;
|
||
if (mach_info == NULL) {
|
||
dev_err(&pdev->dev,"no platform data for lcd, cannot attach\n");
|
||
return -EINVAL;
|
||
}
|
||
|
||
mregs = &mach_info->regs;
|
||
|
||
irq = platform_get_irq(pdev, 0);
|
||
if (irq < 0) {
|
||
dev_err(&pdev->dev, "no irq for device\n");
|
||
return -ENOENT;
|
||
}
|
||
|
||
fbinfo = framebuffer_alloc(sizeof(struct s3c2410fb_info), &pdev->dev);
|
||
if (!fbinfo) {
|
||
return -ENOMEM;
|
||
}
|
||
|
||
|
||
info = fbinfo->par;
|
||
info->fb = fbinfo;
|
||
info->dev = &pdev->dev;
|
||
|
||
platform_set_drvdata(pdev, fbinfo);
|
||
|
||
dprintk("devinit\n");
|
||
|
||
strcpy(fbinfo->fix.id, driver_name);
|
||
|
||
memcpy(&info->regs, &mach_info->regs, sizeof(info->regs));
|
||
|
||
/* Stop the video and unset ENVID if set */
|
||
info->regs.lcdcon1 &= ~S3C2410_LCDCON1_ENVID;
|
||
lcdcon1 = readl(S3C2410_LCDCON1);
|
||
writel(lcdcon1 & ~S3C2410_LCDCON1_ENVID, S3C2410_LCDCON1);
|
||
|
||
info->mach_info = pdev->dev.platform_data;
|
||
|
||
fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
|
||
fbinfo->fix.type_aux = 0;
|
||
fbinfo->fix.xpanstep = 0;
|
||
fbinfo->fix.ypanstep = 0;
|
||
fbinfo->fix.ywrapstep = 0;
|
||
fbinfo->fix.accel = FB_ACCEL_NONE;
|
||
|
||
fbinfo->var.nonstd = 0;
|
||
fbinfo->var.activate = FB_ACTIVATE_NOW;
|
||
fbinfo->var.height = mach_info->height;
|
||
fbinfo->var.width = mach_info->width;
|
||
fbinfo->var.accel_flags = 0;
|
||
fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
|
||
|
||
fbinfo->fbops = &s3c2410fb_ops;
|
||
fbinfo->flags = FBINFO_FLAG_DEFAULT;
|
||
fbinfo->pseudo_palette = &info->pseudo_pal;
|
||
|
||
fbinfo->var.xres = mach_info->xres.defval;
|
||
fbinfo->var.xres_virtual = mach_info->xres.defval;
|
||
fbinfo->var.yres = mach_info->yres.defval;
|
||
fbinfo->var.yres_virtual = mach_info->yres.defval;
|
||
fbinfo->var.bits_per_pixel = mach_info->bpp.defval;
|
||
|
||
fbinfo->var.upper_margin = S3C2410_LCDCON2_GET_VBPD(mregs->lcdcon2) + 1;
|
||
fbinfo->var.lower_margin = S3C2410_LCDCON2_GET_VFPD(mregs->lcdcon2) + 1;
|
||
fbinfo->var.vsync_len = S3C2410_LCDCON2_GET_VSPW(mregs->lcdcon2) + 1;
|
||
|
||
fbinfo->var.left_margin = S3C2410_LCDCON3_GET_HFPD(mregs->lcdcon3) + 1;
|
||
fbinfo->var.right_margin = S3C2410_LCDCON3_GET_HBPD(mregs->lcdcon3) + 1;
|
||
fbinfo->var.hsync_len = S3C2410_LCDCON4_GET_HSPW(mregs->lcdcon4) + 1;
|
||
|
||
fbinfo->var.red.offset = 11;
|
||
fbinfo->var.green.offset = 5;
|
||
fbinfo->var.blue.offset = 0;
|
||
fbinfo->var.transp.offset = 0;
|
||
fbinfo->var.red.length = 5;
|
||
fbinfo->var.green.length = 6;
|
||
fbinfo->var.blue.length = 5;
|
||
fbinfo->var.transp.length = 0;
|
||
fbinfo->fix.smem_len = mach_info->xres.max *
|
||
mach_info->yres.max *
|
||
mach_info->bpp.max / 8;
|
||
|
||
for (i = 0; i < 256; i++)
|
||
info->palette_buffer[i] = PALETTE_BUFF_CLEAR;
|
||
|
||
if (!request_mem_region((unsigned long)S3C24XX_VA_LCD, SZ_1M, "s3c2410-lcd")) {
|
||
ret = -EBUSY;
|
||
goto dealloc_fb;
|
||
}
|
||
|
||
|
||
dprintk("got LCD region\n");
|
||
|
||
ret = request_irq(irq, s3c2410fb_irq, IRQF_DISABLED, pdev->name, info);
|
||
if (ret) {
|
||
dev_err(&pdev->dev, "cannot get irq %d - err %d\n", irq, ret);
|
||
ret = -EBUSY;
|
||
goto release_mem;
|
||
}
|
||
|
||
info->clk = clk_get(NULL, "lcd");
|
||
if (!info->clk || IS_ERR(info->clk)) {
|
||
printk(KERN_ERR "failed to get lcd clock source\n");
|
||
ret = -ENOENT;
|
||
goto release_irq;
|
||
}
|
||
|
||
clk_enable(info->clk);
|
||
dprintk("got and enabled clock\n");
|
||
|
||
msleep(1);
|
||
|
||
/* Initialize video memory */
|
||
ret = s3c2410fb_map_video_memory(info);
|
||
if (ret) {
|
||
printk( KERN_ERR "Failed to allocate video RAM: %d\n", ret);
|
||
ret = -ENOMEM;
|
||
goto release_clock;
|
||
}
|
||
dprintk("got video memory\n");
|
||
|
||
ret = s3c2410fb_init_registers(info);
|
||
|
||
ret = s3c2410fb_check_var(&fbinfo->var, fbinfo);
|
||
|
||
ret = register_framebuffer(fbinfo);
|
||
if (ret < 0) {
|
||
printk(KERN_ERR "Failed to register framebuffer device: %d\n", ret);
|
||
goto free_video_memory;
|
||
}
|
||
|
||
/* create device files */
|
||
device_create_file(&pdev->dev, &dev_attr_debug);
|
||
|
||
printk(KERN_INFO "fb%d: %s frame buffer device\n",
|
||
fbinfo->node, fbinfo->fix.id);
|
||
|
||
return 0;
|
||
|
||
free_video_memory:
|
||
s3c2410fb_unmap_video_memory(info);
|
||
release_clock:
|
||
clk_disable(info->clk);
|
||
clk_put(info->clk);
|
||
release_irq:
|
||
free_irq(irq,info);
|
||
release_mem:
|
||
release_mem_region((unsigned long)S3C24XX_VA_LCD, S3C24XX_SZ_LCD);
|
||
dealloc_fb:
|
||
framebuffer_release(fbinfo);
|
||
return ret;
|
||
}
|
||
|
||
/* 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, S3C2410_LCDCON1);
|
||
|
||
local_irq_restore(flags);
|
||
}
|
||
|
||
/*
|
||
* Cleanup
|
||
*/
|
||
static int s3c2410fb_remove(struct platform_device *pdev)
|
||
{
|
||
struct fb_info *fbinfo = platform_get_drvdata(pdev);
|
||
struct s3c2410fb_info *info = fbinfo->par;
|
||
int irq;
|
||
|
||
s3c2410fb_stop_lcd(info);
|
||
msleep(1);
|
||
|
||
s3c2410fb_unmap_video_memory(info);
|
||
|
||
if (info->clk) {
|
||
clk_disable(info->clk);
|
||
clk_put(info->clk);
|
||
info->clk = NULL;
|
||
}
|
||
|
||
irq = platform_get_irq(pdev, 0);
|
||
free_irq(irq,info);
|
||
release_mem_region((unsigned long)S3C24XX_VA_LCD, S3C24XX_SZ_LCD);
|
||
unregister_framebuffer(fbinfo);
|
||
|
||
return 0;
|
||
}
|
||
|
||
#ifdef CONFIG_PM
|
||
|
||
/* suspend and resume support for the lcd controller */
|
||
|
||
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);
|
||
|
||
/* sleep before disabling the clock, we need to ensure
|
||
* the LCD DMA engine is not going to get back on the bus
|
||
* before the clock goes off again (bjd) */
|
||
|
||
msleep(1);
|
||
clk_disable(info->clk);
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int s3c2410fb_resume(struct platform_device *dev)
|
||
{
|
||
struct fb_info *fbinfo = platform_get_drvdata(dev);
|
||
struct s3c2410fb_info *info = fbinfo->par;
|
||
|
||
clk_enable(info->clk);
|
||
msleep(1);
|
||
|
||
s3c2410fb_init_registers(info);
|
||
|
||
return 0;
|
||
}
|
||
|
||
#else
|
||
#define s3c2410fb_suspend NULL
|
||
#define s3c2410fb_resume NULL
|
||
#endif
|
||
|
||
static struct platform_driver s3c2410fb_driver = {
|
||
.probe = s3c2410fb_probe,
|
||
.remove = s3c2410fb_remove,
|
||
.suspend = s3c2410fb_suspend,
|
||
.resume = s3c2410fb_resume,
|
||
.driver = {
|
||
.name = "s3c2410-lcd",
|
||
.owner = THIS_MODULE,
|
||
},
|
||
};
|
||
|
||
int __devinit s3c2410fb_init(void)
|
||
{
|
||
return platform_driver_register(&s3c2410fb_driver);
|
||
}
|
||
|
||
static void __exit s3c2410fb_cleanup(void)
|
||
{
|
||
platform_driver_unregister(&s3c2410fb_driver);
|
||
}
|
||
|
||
|
||
module_init(s3c2410fb_init);
|
||
module_exit(s3c2410fb_cleanup);
|
||
|
||
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");
|