diff options
Diffstat (limited to 'drivers/video/s3c2410fb.c')
| -rw-r--r-- | drivers/video/s3c2410fb.c | 905 |
1 files changed, 0 insertions, 905 deletions
diff --git a/drivers/video/s3c2410fb.c b/drivers/video/s3c2410fb.c deleted file mode 100644 index d574dd3c9c8..00000000000 --- a/drivers/video/s3c2410fb.c +++ /dev/null @@ -1,905 +0,0 @@ -/* - * linux/drivers/video/s3c2410fb.c - * Copyright (c) Arnaud Patard, Ben Dooks - * - * 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 mesaages - * - 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 exist - * - 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 - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/string.h> -#include <linux/mm.h> -#include <linux/tty.h> -#include <linux/slab.h> -#include <linux/delay.h> -#include <linux/fb.h> -#include <linux/init.h> -#include <linux/dma-mapping.h> -#include <linux/string.h> -#include <linux/interrupt.h> -#include <linux/workqueue.h> -#include <linux/wait.h> -#include <linux/platform_device.h> -#include <linux/clk.h> - -#include <asm/io.h> -#include <asm/uaccess.h> -#include <asm/div64.h> - -#include <asm/mach/map.h> -#include <asm/arch/regs-lcd.h> -#include <asm/arch/regs-gpio.h> -#include <asm/arch/fb.h> - -#ifdef CONFIG_PM -#include <linux/pm.h> -#endif - -#include "s3c2410fb.h" - - -static struct s3c2410fb_mach_info *mach_info; - -/* Debugging stuff */ -#ifdef CONFIG_FB_S3C2410_DEBUG -static int debug = 1; -#else -static int debug = 0; -#endif - -#define dprintk(msg...) if (debug) { printk(KERN_DEBUG "s3c2410fb: " msg); } - -/* useful functions */ - -/* s3c2410fb_set_lcdaddr - * - * initialise lcd controller address pointers -*/ - -static void s3c2410fb_set_lcdaddr(struct s3c2410fb_info *fbi) -{ - struct fb_var_screeninfo *var = &fbi->fb->var; - unsigned long saddr1, saddr2, saddr3; - - saddr1 = fbi->fb->fix.smem_start >> 1; - saddr2 = fbi->fb->fix.smem_start; - saddr2 += (var->xres * var->yres * var->bits_per_pixel)/8; - saddr2>>= 1; - - saddr3 = S3C2410_OFFSIZE(0) | S3C2410_PAGEWIDTH(var->xres); - - dprintk("LCDSADDR1 = 0x%08lx\n", saddr1); - dprintk("LCDSADDR2 = 0x%08lx\n", saddr2); - dprintk("LCDSADDR3 = 0x%08lx\n", saddr3); - - writel(saddr1, S3C2410_LCDSADDR1); - writel(saddr2, S3C2410_LCDSADDR2); - writel(saddr3, S3C2410_LCDSADDR3); -} - -/* s3c2410fb_calc_pixclk() - * - * calculate divisor for clk->pixclk -*/ - -static unsigned int s3c2410fb_calc_pixclk(struct s3c2410fb_info *fbi, - unsigned long pixclk) -{ - unsigned long clk = clk_get_rate(fbi->clk); - unsigned long long div; - - /* pixclk is in picoseoncds, our clock is in Hz - * - * Hz -> picoseconds is / 10^-12 - */ - - div = (unsigned long long)clk * pixclk; - do_div(div,1000000UL); - do_div(div,1000000UL); - - dprintk("pixclk %ld, divisor is %ld\n", pixclk, (long)div); - return div; -} - -/* - * s3c2410fb_check_var(): - * Get the video params out of 'var'. If a value doesn't fit, round it up, - * if it's too big, return -EINVAL. - * - */ -static int s3c2410fb_check_var(struct fb_var_screeninfo *var, - struct fb_info *info) -{ - struct s3c2410fb_info *fbi = info->par; - - dprintk("check_var(var=%p, info=%p)\n", var, info); - - /* validate x/y resolution */ - - if (var->yres > fbi->mach_info->yres.max) - var->yres = fbi->mach_info->yres.max; - else if (var->yres < fbi->mach_info->yres.min) - var->yres = fbi->mach_info->yres.min; - - if (var->xres > fbi->mach_info->xres.max) - var->yres = fbi->mach_info->xres.max; - else if (var->xres < fbi->mach_info->xres.min) - var->xres = fbi->mach_info->xres.min; - - /* validate bpp */ - - if (var->bits_per_pixel > fbi->mach_info->bpp.max) - var->bits_per_pixel = fbi->mach_info->bpp.max; - else if (var->bits_per_pixel < fbi->mach_info->bpp.min) - var->bits_per_pixel = fbi->mach_info->bpp.min; - - /* set r/g/b positions */ - - if (var->bits_per_pixel == 16) { - var->red.offset = 11; - var->green.offset = 5; - var->blue.offset = 0; - var->red.length = 5; - var->green.length = 6; - var->blue.length = 5; - var->transp.length = 0; - } else { - var->red.length = var->bits_per_pixel; - var->red.offset = 0; - var->green.length = var->bits_per_pixel; - var->green.offset = 0; - var->blue.length = var->bits_per_pixel; - var->blue.offset = 0; - var->transp.length = 0; - } - - return 0; -} - -/* s3c2410fb_activate_var - * - * activate (set) the controller from the given framebuffer - * information -*/ - -static void s3c2410fb_activate_var(struct s3c2410fb_info *fbi, - struct fb_var_screeninfo *var) -{ - fbi->regs.lcdcon1 &= ~S3C2410_LCDCON1_MODEMASK; - - dprintk("%s: var->xres = %d\n", __FUNCTION__, var->xres); - dprintk("%s: var->yres = %d\n", __FUNCTION__, var->yres); - dprintk("%s: var->bpp = %d\n", __FUNCTION__, var->bits_per_pixel); - - switch (var->bits_per_pixel) { - case 1: - fbi->regs.lcdcon1 |= S3C2410_LCDCON1_TFT1BPP; - break; - case 2: - fbi->regs.lcdcon1 |= S3C2410_LCDCON1_TFT2BPP; - break; - case 4: - fbi->regs.lcdcon1 |= S3C2410_LCDCON1_TFT4BPP; - break; - case 8: - fbi->regs.lcdcon1 |= S3C2410_LCDCON1_TFT8BPP; - break; - case 16: - fbi->regs.lcdcon1 |= S3C2410_LCDCON1_TFT16BPP; - break; - } - - /* check to see if we need to update sync/borders */ - - if (!fbi->mach_info->fixed_syncs) { - dprintk("setting vert: up=%d, low=%d, sync=%d\n", - var->upper_margin, var->lower_margin, - var->vsync_len); - - dprintk("setting horz: lft=%d, rt=%d, sync=%d\n", - var->left_margin, var->right_margin, - var->hsync_len); - - fbi->regs.lcdcon2 = - S3C2410_LCDCON2_VBPD(var->upper_margin - 1) | - S3C2410_LCDCON2_VFPD(var->lower_margin - 1) | - S3C2410_LCDCON2_VSPW(var->vsync_len - 1); - - fbi->regs.lcdcon3 = - S3C2410_LCDCON3_HBPD(var->right_margin - 1) | - S3C2410_LCDCON3_HFPD(var->left_margin - 1); - - fbi->regs.lcdcon4 &= ~S3C2410_LCDCON4_HSPW(0xff); - fbi->regs.lcdcon4 |= S3C2410_LCDCON4_HSPW(var->hsync_len - 1); - } - - /* update X/Y info */ - - fbi->regs.lcdcon2 &= ~S3C2410_LCDCON2_LINEVAL(0x3ff); - fbi->regs.lcdcon2 |= S3C2410_LCDCON2_LINEVAL(var->yres - 1); - - fbi->regs.lcdcon3 &= ~S3C2410_LCDCON3_HOZVAL(0x7ff); - fbi->regs.lcdcon3 |= S3C2410_LCDCON3_HOZVAL(var->xres - 1); - - if (var->pixclock > 0) { - int clkdiv = s3c2410fb_calc_pixclk(fbi, var->pixclock); - - clkdiv = (clkdiv / 2) -1; - if (clkdiv < 0) - clkdiv = 0; - - fbi->regs.lcdcon1 &= ~S3C2410_LCDCON1_CLKVAL(0x3ff); - fbi->regs.lcdcon1 |= S3C2410_LCDCON1_CLKVAL(clkdiv); - } - - /* write new registers */ - - dprintk("new register set:\n"); - dprintk("lcdcon[1] = 0x%08lx\n", fbi->regs.lcdcon1); - dprintk("lcdcon[2] = 0x%08lx\n", fbi->regs.lcdcon2); - dprintk("lcdcon[3] = 0x%08lx\n", fbi->regs.lcdcon3); - dprintk("lcdcon[4] = 0x%08lx\n", fbi->regs.lcdcon4); - dprintk("lcdcon[5] = 0x%08lx\n", fbi->regs.lcdcon5); - - writel(fbi->regs.lcdcon1 & ~S3C2410_LCDCON1_ENVID, 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); - - /* set lcd address pointers */ - s3c2410fb_set_lcdaddr(fbi); - - writel(fbi->regs.lcdcon1, S3C2410_LCDCON1); -} - - -/* - * s3c2410fb_set_par - Optional function. Alters the hardware state. - * @info: frame buffer structure that represents a single frame buffer - * - */ -static int s3c2410fb_set_par(struct fb_info *info) -{ - struct s3c2410fb_info *fbi = info->par; - struct fb_var_screeninfo *var = &info->var; - - if (var->bits_per_pixel == 16) - fbi->fb->fix.visual = FB_VISUAL_TRUECOLOR; - else - fbi->fb->fix.visual = FB_VISUAL_PSEUDOCOLOR; - - 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 pt_regs *r) -{ - 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; - - 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; - platform_set_drvdata(pdev, fbinfo); - - dprintk("devinit\n"); - - strcpy(fbinfo->fix.id, driver_name); - - memcpy(&info->regs, &mach_info->regs, sizeof(info->regs)); - - 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, SA_INTERRUPT, 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(void) -{ - unsigned long flags; - unsigned long tmp; - - local_irq_save(flags); - - tmp = readl(S3C2410_LCDCON1); - writel(tmp & ~S3C2410_LCDCON1_ENVID, 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(); - 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(); - - /* 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"); |