diff options
Diffstat (limited to 'drivers/video/fbdev/s3c2410fb.c')
| -rw-r--r-- | drivers/video/fbdev/s3c2410fb.c | 1142 |
1 files changed, 0 insertions, 1142 deletions
diff --git a/drivers/video/fbdev/s3c2410fb.c b/drivers/video/fbdev/s3c2410fb.c deleted file mode 100644 index d8ae5258de46..000000000000 --- a/drivers/video/fbdev/s3c2410fb.c +++ /dev/null @@ -1,1142 +0,0 @@ -/* 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. - * - * Driver based on skeletonfb.c, sa1100fb.c and others. -*/ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/err.h> -#include <linux/errno.h> -#include <linux/string.h> -#include <linux/mm.h> -#include <linux/slab.h> -#include <linux/delay.h> -#include <linux/fb.h> -#include <linux/init.h> -#include <linux/dma-mapping.h> -#include <linux/interrupt.h> -#include <linux/platform_device.h> -#include <linux/clk.h> -#include <linux/cpufreq.h> -#include <linux/io.h> -#include <linux/platform_data/fb-s3c2410.h> - -#include <asm/div64.h> - -#include <asm/mach/map.h> - -#ifdef CONFIG_PM -#include <linux/pm.h> -#endif - -#include "s3c2410fb.h" -#include "s3c2410fb-regs-lcd.h" - -/* Debugging stuff */ -static int debug = IS_BUILTIN(CONFIG_FB_S3C2410_DEBUG); - -#define dprintk(msg...) \ -do { \ - if (debug) \ - pr_debug(msg); \ -} while (0) - -/* useful functions */ - -static int is_s3c2412(struct s3c2410fb_info *fbi) -{ - return (fbi->drv_type == DRV_S3C2412); -} - -/* s3c2410fb_set_lcdaddr - * - * initialise lcd controller address pointers - */ -static void s3c2410fb_set_lcdaddr(struct fb_info *info) -{ - unsigned long saddr1, saddr2, saddr3; - struct s3c2410fb_info *fbi = info->par; - void __iomem *regs = fbi->io; - - saddr1 = info->fix.smem_start >> 1; - saddr2 = info->fix.smem_start; - saddr2 += info->fix.line_length * info->var.yres; - saddr2 >>= 1; - - saddr3 = S3C2410_OFFSIZE(0) | - S3C2410_PAGEWIDTH((info->fix.line_length / 2) & 0x3ff); - - dprintk("LCDSADDR1 = 0x%08lx\n", saddr1); - dprintk("LCDSADDR2 = 0x%08lx\n", saddr2); - dprintk("LCDSADDR3 = 0x%08lx\n", saddr3); - - writel(saddr1, regs + S3C2410_LCDSADDR1); - writel(saddr2, regs + S3C2410_LCDSADDR2); - writel(saddr3, regs + 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 = fbi->clk_rate; - unsigned long long div; - - /* pixclk is in picoseconds, our clock is in Hz - * - * Hz -> picoseconds is / 10^-12 - */ - - div = (unsigned long long)clk * pixclk; - div >>= 12; /* div / 2^12 */ - do_div(div, 625 * 625UL * 625); /* div / 5^12 */ - - 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; - struct s3c2410fb_mach_info *mach_info = dev_get_platdata(fbi->dev); - struct s3c2410fb_display *display = NULL; - struct s3c2410fb_display *default_display = mach_info->displays + - mach_info->default_display; - int type = default_display->type; - unsigned i; - - dprintk("check_var(var=%p, info=%p)\n", var, info); - - /* validate x/y resolution */ - /* choose default mode if possible */ - if (var->yres == default_display->yres && - var->xres == default_display->xres && - var->bits_per_pixel == default_display->bpp) - display = default_display; - else - for (i = 0; i < mach_info->num_displays; i++) - if (type == mach_info->displays[i].type && - var->yres == mach_info->displays[i].yres && - var->xres == mach_info->displays[i].xres && - var->bits_per_pixel == mach_info->displays[i].bpp) { - display = mach_info->displays + i; - break; - } - - if (!display) { - dprintk("wrong resolution or depth %dx%d at %d bpp\n", - var->xres, var->yres, var->bits_per_pixel); - return -EINVAL; - } - - /* it is always the size as the display */ - var->xres_virtual = display->xres; - var->yres_virtual = display->yres; - var->height = display->height; - var->width = display->width; - - /* copy lcd settings */ - var->pixclock = display->pixclock; - var->left_margin = display->left_margin; - var->right_margin = display->right_margin; - var->upper_margin = display->upper_margin; - var->lower_margin = display->lower_margin; - var->vsync_len = display->vsync_len; - var->hsync_len = display->hsync_len; - - fbi->regs.lcdcon5 = display->lcdcon5; - /* set display type */ - fbi->regs.lcdcon1 = display->type; - - var->transp.offset = 0; - var->transp.length = 0; - /* set r/g/b positions */ - switch (var->bits_per_pixel) { - case 1: - case 2: - case 4: - var->red.offset = 0; - var->red.length = var->bits_per_pixel; - var->green = var->red; - var->blue = var->red; - break; - case 8: - if (display->type != S3C2410_LCDCON1_TFT) { - /* 8 bpp 332 */ - var->red.length = 3; - var->red.offset = 5; - var->green.length = 3; - var->green.offset = 2; - var->blue.length = 2; - var->blue.offset = 0; - } else { - var->red.offset = 0; - var->red.length = 8; - var->green = var->red; - var->blue = var->red; - } - break; - case 12: - /* 12 bpp 444 */ - var->red.length = 4; - var->red.offset = 8; - var->green.length = 4; - var->green.offset = 4; - var->blue.length = 4; - var->blue.offset = 0; - break; - - default: - case 16: - if (display->lcdcon5 & S3C2410_LCDCON5_FRM565) { - /* 16 bpp, 565 format */ - var->red.offset = 11; - var->green.offset = 5; - var->blue.offset = 0; - var->red.length = 5; - var->green.length = 6; - var->blue.length = 5; - } else { - /* 16 bpp, 5551 format */ - var->red.offset = 11; - var->green.offset = 6; - var->blue.offset = 1; - var->red.length = 5; - var->green.length = 5; - var->blue.length = 5; - } - break; - case 32: - /* 24 bpp 888 and 8 dummy */ - var->red.length = 8; - var->red.offset = 16; - var->green.length = 8; - var->green.offset = 8; - var->blue.length = 8; - var->blue.offset = 0; - break; - } - return 0; -} - -/* s3c2410fb_calculate_stn_lcd_regs - * - * calculate register values from var settings - */ -static void s3c2410fb_calculate_stn_lcd_regs(const struct fb_info *info, - struct s3c2410fb_hw *regs) -{ - const struct s3c2410fb_info *fbi = info->par; - const struct fb_var_screeninfo *var = &info->var; - int type = regs->lcdcon1 & ~S3C2410_LCDCON1_TFT; - int hs = var->xres >> 2; - unsigned wdly = (var->left_margin >> 4) - 1; - unsigned wlh = (var->hsync_len >> 4) - 1; - - if (type != S3C2410_LCDCON1_STN4) - hs >>= 1; - - switch (var->bits_per_pixel) { - case 1: - regs->lcdcon1 |= S3C2410_LCDCON1_STN1BPP; - break; - case 2: - regs->lcdcon1 |= S3C2410_LCDCON1_STN2GREY; - break; - case 4: - regs->lcdcon1 |= S3C2410_LCDCON1_STN4GREY; - break; - case 8: - regs->lcdcon1 |= S3C2410_LCDCON1_STN8BPP; - hs *= 3; - break; - case 12: - regs->lcdcon1 |= S3C2410_LCDCON1_STN12BPP; - hs *= 3; - break; - - default: - /* invalid pixel depth */ - dev_err(fbi->dev, "invalid bpp %d\n", - var->bits_per_pixel); - } - /* update X/Y info */ - dprintk("setting horz: lft=%d, rt=%d, sync=%d\n", - var->left_margin, var->right_margin, var->hsync_len); - - regs->lcdcon2 = S3C2410_LCDCON2_LINEVAL(var->yres - 1); - - if (wdly > 3) - wdly = 3; - - if (wlh > 3) - wlh = 3; - - regs->lcdcon3 = S3C2410_LCDCON3_WDLY(wdly) | - S3C2410_LCDCON3_LINEBLANK(var->right_margin / 8) | - S3C2410_LCDCON3_HOZVAL(hs - 1); - - regs->lcdcon4 = S3C2410_LCDCON4_WLH(wlh); -} - -/* s3c2410fb_calculate_tft_lcd_regs - * - * calculate register values from var settings - */ -static void s3c2410fb_calculate_tft_lcd_regs(const struct fb_info *info, - struct s3c2410fb_hw *regs) -{ - const struct s3c2410fb_info *fbi = info->par; - const struct fb_var_screeninfo *var = &info->var; - - switch (var->bits_per_pixel) { - case 1: - regs->lcdcon1 |= S3C2410_LCDCON1_TFT1BPP; - break; - case 2: - regs->lcdcon1 |= S3C2410_LCDCON1_TFT2BPP; - break; - case 4: - regs->lcdcon1 |= S3C2410_LCDCON1_TFT4BPP; - break; - case 8: - regs->lcdcon1 |= S3C2410_LCDCON1_TFT8BPP; - regs->lcdcon5 |= S3C2410_LCDCON5_BSWP | - S3C2410_LCDCON5_FRM565; - regs->lcdcon5 &= ~S3C2410_LCDCON5_HWSWP; - break; - case 16: - regs->lcdcon1 |= S3C2410_LCDCON1_TFT16BPP; - regs->lcdcon5 &= ~S3C2410_LCDCON5_BSWP; - regs->lcdcon5 |= S3C2410_LCDCON5_HWSWP; - break; - case 32: - regs->lcdcon1 |= S3C2410_LCDCON1_TFT24BPP; - regs->lcdcon5 &= ~(S3C2410_LCDCON5_BSWP | - S3C2410_LCDCON5_HWSWP | - S3C2410_LCDCON5_BPP24BL); - break; - default: - /* invalid pixel depth */ - dev_err(fbi->dev, "invalid bpp %d\n", - var->bits_per_pixel); - } - /* update X/Y info */ - 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); - - regs->lcdcon2 = S3C2410_LCDCON2_LINEVAL(var->yres - 1) | - S3C2410_LCDCON2_VBPD(var->upper_margin - 1) | - S3C2410_LCDCON2_VFPD(var->lower_margin - 1) | - S3C2410_LCDCON2_VSPW(var->vsync_len - 1); - - regs->lcdcon3 = S3C2410_LCDCON3_HBPD(var->right_margin - 1) | - S3C2410_LCDCON3_HFPD(var->left_margin - 1) | - S3C2410_LCDCON3_HOZVAL(var->xres - 1); - - regs->lcdcon4 = S3C2410_LCDCON4_HSPW(var->hsync_len - 1); -} - -/* s3c2410fb_activate_var - * - * activate (set) the controller from the given framebuffer - * information - */ -static void s3c2410fb_activate_var(struct fb_info *info) -{ - struct s3c2410fb_info *fbi = info->par; - void __iomem *regs = fbi->io; - int type = fbi->regs.lcdcon1 & S3C2410_LCDCON1_TFT; - struct fb_var_screeninfo *var = &info->var; - int clkdiv; - - clkdiv = DIV_ROUND_UP(s3c2410fb_calc_pixclk(fbi, var->pixclock), 2); - - dprintk("%s: var->xres = %d\n", __func__, var->xres); - dprintk("%s: var->yres = %d\n", __func__, var->yres); - dprintk("%s: var->bpp = %d\n", __func__, var->bits_per_pixel); - - if (type == S3C2410_LCDCON1_TFT) { - s3c2410fb_calculate_tft_lcd_regs(info, &fbi->regs); - --clkdiv; - if (clkdiv < 0) - clkdiv = 0; - } else { - s3c2410fb_calculate_stn_lcd_regs(info, &fbi->regs); - if (clkdiv < 2) - clkdiv = 2; - } - - 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, - regs + S3C2410_LCDCON1); - writel(fbi->regs.lcdcon2, regs + S3C2410_LCDCON2); - writel(fbi->regs.lcdcon3, regs + S3C2410_LCDCON3); - writel(fbi->regs.lcdcon4, regs + S3C2410_LCDCON4); - writel(fbi->regs.lcdcon5, regs + S3C2410_LCDCON5); - - /* set lcd address pointers */ - s3c2410fb_set_lcdaddr(info); - - fbi->regs.lcdcon1 |= S3C2410_LCDCON1_ENVID, - writel(fbi->regs.lcdcon1, regs + S3C2410_LCDCON1); -} - -/* - * s3c2410fb_set_par - Alters the hardware state. - * @info: frame buffer structure that represents a single frame buffer - * - */ -static int s3c2410fb_set_par(struct fb_info *info) -{ - struct fb_var_screeninfo *var = &info->var; - - switch (var->bits_per_pixel) { - case 32: - case 16: - case 12: - info->fix.visual = FB_VISUAL_TRUECOLOR; - break; - case 1: - info->fix.visual = FB_VISUAL_MONO01; - break; - default: - info->fix.visual = FB_VISUAL_PSEUDOCOLOR; - break; - } - - info->fix.line_length = (var->xres_virtual * var->bits_per_pixel) / 8; - - /* activate this new configuration */ - - s3c2410fb_activate_var(info); - return 0; -} - -static void schedule_palette_update(struct s3c2410fb_info *fbi, - unsigned int regno, unsigned int val) -{ - unsigned long flags; - unsigned long irqen; - void __iomem *irq_base = fbi->irq_base; - - local_irq_save(flags); - - fbi->palette_buffer[regno] = val; - - if (!fbi->palette_ready) { - fbi->palette_ready = 1; - - /* enable IRQ */ - irqen = readl(irq_base + S3C24XX_LCDINTMSK); - irqen &= ~S3C2410_LCDINT_FRSYNC; - writel(irqen, irq_base + S3C24XX_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; - void __iomem *regs = fbi->io; - unsigned int val; - - /* dprintk("setcol: regno=%d, rgb=%d,%d,%d\n", - regno, red, green, blue); */ - - switch (info->fix.visual) { - case FB_VISUAL_TRUECOLOR: - /* true-colour, use pseudo-palette */ - - if (regno < 16) { - u32 *pal = info->pseudo_palette; - - val = chan_to_field(red, &info->var.red); - val |= chan_to_field(green, &info->var.green); - val |= chan_to_field(blue, &info->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, regs + S3C2410_TFTPAL(regno)); - schedule_palette_update(fbi, regno, val); - } - - break; - - default: - return 1; /* unknown type */ - } - - 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. - * @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: - * - * Returns negative errno on error, or zero on success. - * - */ -static int s3c2410fb_blank(int blank_mode, struct fb_info *info) -{ - struct s3c2410fb_info *fbi = info->par; - void __iomem *tpal_reg = fbi->io; - - dprintk("blank(mode=%d, info=%p)\n", blank_mode, 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 { - dprintk("setting TPAL to output 0x000000\n"); - writel(S3C2410_TPAL_EN, tpal_reg); - } - - 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 (len < 1) - return -EINVAL; - - if (strncasecmp(buf, "on", 2) == 0 || - strncasecmp(buf, "1", 1) == 0) { - debug = 1; - dev_dbg(dev, "s3c2410fb: Debug On"); - } else if (strncasecmp(buf, "off", 3) == 0 || - strncasecmp(buf, "0", 1) == 0) { - debug = 0; - dev_dbg(dev, "s3c2410fb: Debug Off"); - } else { - return -EINVAL; - } - - return len; -} - -static DEVICE_ATTR(debug, 0664, s3c2410fb_debug_show, s3c2410fb_debug_store); - -static const 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 s3c2410fb_map_video_memory(struct fb_info *info) -{ - struct s3c2410fb_info *fbi = info->par; - dma_addr_t map_dma; - unsigned map_size = PAGE_ALIGN(info->fix.smem_len); - - dprintk("map_video_memory(fbi=%p) map_size %u\n", fbi, map_size); - - info->screen_base = dma_alloc_wc(fbi->dev, map_size, &map_dma, - GFP_KERNEL); - - if (info->screen_base) { - /* prevent initial garbage on screen */ - dprintk("map_video_memory: clear %p:%08x\n", - info->screen_base, map_size); - memset(info->screen_base, 0x00, map_size); - - info->fix.smem_start = map_dma; - - dprintk("map_video_memory: dma=%08lx cpu=%p size=%08x\n", - info->fix.smem_start, info->screen_base, map_size); - } - - return info->screen_base ? 0 : -ENOMEM; -} - -static inline void s3c2410fb_unmap_video_memory(struct fb_info *info) -{ - struct s3c2410fb_info *fbi = info->par; - - dma_free_wc(fbi->dev, PAGE_ALIGN(info->fix.smem_len), - info->screen_base, info->fix.smem_start); -} - -static inline void modify_gpio(void __iomem *reg, - unsigned long set, unsigned long mask) -{ - unsigned long tmp; - - if (!reg) - return; - - tmp = readl(reg) & ~mask; - writel(tmp | set, reg); -} - -/* - * s3c2410fb_init_registers - Initialise all LCD-related registers - */ -static int s3c2410fb_init_registers(struct fb_info *info) -{ - struct s3c2410fb_info *fbi = info->par; - struct s3c2410fb_mach_info *mach_info = dev_get_platdata(fbi->dev); - unsigned long flags; - void __iomem *regs = fbi->io; - void __iomem *tpal; - void __iomem *lpcsel; - - if (is_s3c2412(fbi)) { - tpal = regs + S3C2412_TPAL; - lpcsel = regs + S3C2412_TCONSEL; - } else { - tpal = regs + S3C2410_TPAL; - lpcsel = regs + S3C2410_LPCSEL; - } - - /* Initialise LCD with values from haret */ - - local_irq_save(flags); - - /* modify the gpio(s) with interrupts set (bjd) */ - - modify_gpio(mach_info->gpcup_reg, mach_info->gpcup, mach_info->gpcup_mask); - modify_gpio(mach_info->gpccon_reg, mach_info->gpccon, mach_info->gpccon_mask); - modify_gpio(mach_info->gpdup_reg, mach_info->gpdup, mach_info->gpdup_mask); - modify_gpio(mach_info->gpdcon_reg, mach_info->gpdcon, mach_info->gpdcon_mask); - - local_irq_restore(flags); - - dprintk("LPCSEL = 0x%08lx\n", mach_info->lpcsel); - writel(mach_info->lpcsel, lpcsel); - - dprintk("replacing TPAL %08x\n", readl(tpal)); - - /* ensure temporary palette disabled */ - writel(0x00, tpal); - - return 0; -} - -static void s3c2410fb_write_palette(struct s3c2410fb_info *fbi) -{ - unsigned int i; - void __iomem *regs = fbi->io; - - fbi->palette_ready = 0; - - for (i = 0; i < 256; i++) { - unsigned long ent = fbi->palette_buffer[i]; - if (ent == PALETTE_BUFF_CLEAR) - continue; - - writel(ent, regs + 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(regs + 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; - void __iomem *irq_base = fbi->irq_base; - unsigned long lcdirq = readl(irq_base + S3C24XX_LCDINTPND); - - if (lcdirq & S3C2410_LCDINT_FRSYNC) { - if (fbi->palette_ready) - s3c2410fb_write_palette(fbi); - - writel(S3C2410_LCDINT_FRSYNC, irq_base + S3C24XX_LCDINTPND); - writel(S3C2410_LCDINT_FRSYNC, irq_base + S3C24XX_LCDSRCPND); - } - - return IRQ_HANDLED; -} - -#ifdef CONFIG_ARM_S3C24XX_CPUFREQ - -static int s3c2410fb_cpufreq_transition(struct notifier_block *nb, - unsigned long val, void *data) -{ - struct s3c2410fb_info *info; - struct fb_info *fbinfo; - long delta_f; - - info = container_of(nb, struct s3c2410fb_info, freq_transition); - fbinfo = dev_get_drvdata(info->dev); - - /* work out change, <0 for speed-up */ - delta_f = info->clk_rate - clk_get_rate(info->clk); - - if ((val == CPUFREQ_POSTCHANGE && delta_f > 0) || - (val == CPUFREQ_PRECHANGE && delta_f < 0)) { - info->clk_rate = clk_get_rate(info->clk); - s3c2410fb_activate_var(fbinfo); - } - - return 0; -} - -static inline int s3c2410fb_cpufreq_register(struct s3c2410fb_info *info) -{ - info->freq_transition.notifier_call = s3c2410fb_cpufreq_transition; - - return cpufreq_register_notifier(&info->freq_transition, - CPUFREQ_TRANSITION_NOTIFIER); -} - -static inline void s3c2410fb_cpufreq_deregister(struct s3c2410fb_info *info) -{ - cpufreq_unregister_notifier(&info->freq_transition, - CPUFREQ_TRANSITION_NOTIFIER); -} - -#else -static inline int s3c2410fb_cpufreq_register(struct s3c2410fb_info *info) -{ - return 0; -} - -static inline void s3c2410fb_cpufreq_deregister(struct s3c2410fb_info *info) -{ -} -#endif - - -static const char driver_name[] = "s3c2410fb"; - -static int s3c24xxfb_probe(struct platform_device *pdev, - enum s3c_drv_type drv_type) -{ - struct s3c2410fb_info *info; - struct s3c2410fb_display *display; - struct fb_info *fbinfo; - struct s3c2410fb_mach_info *mach_info; - struct resource *res; - int ret; - int irq; - int i; - int size; - u32 lcdcon1; - - mach_info = dev_get_platdata(&pdev->dev); - if (mach_info == NULL) { - dev_err(&pdev->dev, - "no platform data for lcd, cannot attach\n"); - return -EINVAL; - } - - if (mach_info->default_display >= mach_info->num_displays) { - dev_err(&pdev->dev, "default is %d but only %d displays\n", - mach_info->default_display, mach_info->num_displays); - return -EINVAL; - } - - display = mach_info->displays + mach_info->default_display; - - 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; - - platform_set_drvdata(pdev, fbinfo); - - info = fbinfo->par; - info->dev = &pdev->dev; - info->drv_type = drv_type; - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (res == NULL) { - dev_err(&pdev->dev, "failed to get memory registers\n"); - ret = -ENXIO; - goto dealloc_fb; - } - - size = resource_size(res); - info->mem = request_mem_region(res->start, size, pdev->name); - if (info->mem == NULL) { - dev_err(&pdev->dev, "failed to get memory region\n"); - ret = -ENOENT; - goto dealloc_fb; - } - - info->io = ioremap(res->start, size); - if (info->io == NULL) { - dev_err(&pdev->dev, "ioremap() of registers failed\n"); - ret = -ENXIO; - goto release_mem; - } - - if (drv_type == DRV_S3C2412) - info->irq_base = info->io + S3C2412_LCDINTBASE; - else - info->irq_base = info->io + S3C2410_LCDINTBASE; - - dprintk("devinit\n"); - - strcpy(fbinfo->fix.id, driver_name); - - /* Stop the video */ - lcdcon1 = readl(info->io + S3C2410_LCDCON1); - writel(lcdcon1 & ~S3C2410_LCDCON1_ENVID, info->io + S3C2410_LCDCON1); - - 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.accel_flags = 0; - fbinfo->var.vmode = FB_VMODE_NONINTERLACED; - - fbinfo->fbops = &s3c2410fb_ops; - fbinfo->flags = FBINFO_FLAG_DEFAULT; - fbinfo->pseudo_palette = &info->pseudo_pal; - - for (i = 0; i < 256; i++) - info->palette_buffer[i] = PALETTE_BUFF_CLEAR; - - ret = request_irq(irq, s3c2410fb_irq, 0, pdev->name, info); - if (ret) { - dev_err(&pdev->dev, "cannot get irq %d - err %d\n", irq, ret); - ret = -EBUSY; - goto release_regs; - } - - info->clk = clk_get(NULL, "lcd"); - if (IS_ERR(info->clk)) { - dev_err(&pdev->dev, "failed to get lcd clock source\n"); - ret = PTR_ERR(info->clk); - goto release_irq; - } - - clk_prepare_enable(info->clk); - dprintk("got and enabled clock\n"); - - usleep_range(1000, 1100); - - info->clk_rate = clk_get_rate(info->clk); - - /* find maximum required memory size for display */ - for (i = 0; i < mach_info->num_displays; i++) { - unsigned long smem_len = mach_info->displays[i].xres; - - smem_len *= mach_info->displays[i].yres; - smem_len *= mach_info->displays[i].bpp; - smem_len >>= 3; - if (fbinfo->fix.smem_len < smem_len) - fbinfo->fix.smem_len = smem_len; - } - - /* Initialize video memory */ - ret = s3c2410fb_map_video_memory(fbinfo); - if (ret) { - dev_err(&pdev->dev, "Failed to allocate video RAM: %d\n", ret); - ret = -ENOMEM; - goto release_clock; - } - - dprintk("got video memory\n"); - - fbinfo->var.xres = display->xres; - fbinfo->var.yres = display->yres; - fbinfo->var.bits_per_pixel = display->bpp; - - s3c2410fb_init_registers(fbinfo); - - s3c2410fb_check_var(&fbinfo->var, fbinfo); - - ret = s3c2410fb_cpufreq_register(info); - if (ret < 0) { - dev_err(&pdev->dev, "Failed to register cpufreq\n"); - goto free_video_memory; - } - - ret = register_framebuffer(fbinfo); - if (ret < 0) { - dev_err(&pdev->dev, "Failed to register framebuffer device: %d\n", - ret); - goto free_cpufreq; - } - - /* create device files */ - ret = device_create_file(&pdev->dev, &dev_attr_debug); - if (ret) - dev_err(&pdev->dev, "failed to add debug attribute\n"); - - dev_info(&pdev->dev, "fb%d: %s frame buffer device\n", - fbinfo->node, fbinfo->fix.id); - - return 0; - - free_cpufreq: - s3c2410fb_cpufreq_deregister(info); -free_video_memory: - s3c2410fb_unmap_video_memory(fbinfo); -release_clock: - clk_disable_unprepare(info->clk); - clk_put(info->clk); -release_irq: - free_irq(irq, info); -release_regs: - iounmap(info->io); -release_mem: - release_mem_region(res->start, size); -dealloc_fb: - framebuffer_release(fbinfo); - return ret; -} - -static int s3c2410fb_probe(struct platform_device *pdev) -{ - return s3c24xxfb_probe(pdev, DRV_S3C2410); -} - -static int s3c2412fb_probe(struct platform_device *pdev) -{ - return s3c24xxfb_probe(pdev, DRV_S3C2412); -} - - -/* - * 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; - - unregister_framebuffer(fbinfo); - s3c2410fb_cpufreq_deregister(info); - - s3c2410fb_lcd_enable(info, 0); - usleep_range(1000, 1100); - - s3c2410fb_unmap_video_memory(fbinfo); - - if (info->clk) { - clk_disable_unprepare(info->clk); - clk_put(info->clk); - info->clk = NULL; - } - - irq = platform_get_irq(pdev, 0); - free_irq(irq, info); - - iounmap(info->io); - - release_mem_region(info->mem->start, resource_size(info->mem)); - - framebuffer_release(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_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 - * before the clock goes off again (bjd) */ - - usleep_range(1000, 1100); - clk_disable_unprepare(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_prepare_enable(info->clk); - usleep_range(1000, 1100); - - s3c2410fb_init_registers(fbinfo); - - /* re-activate our display after resume */ - s3c2410fb_activate_var(fbinfo); - s3c2410fb_blank(FB_BLANK_UNBLANK, fbinfo); - - 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", - }, -}; - -static struct platform_driver s3c2412fb_driver = { - .probe = s3c2412fb_probe, - .remove = s3c2410fb_remove, - .suspend = s3c2410fb_suspend, - .resume = s3c2410fb_resume, - .driver = { - .name = "s3c2412-lcd", - }, -}; - -int __init s3c2410fb_init(void) -{ - int ret = platform_driver_register(&s3c2410fb_driver); - - if (ret == 0) - ret = platform_driver_register(&s3c2412fb_driver); - - return ret; -} - -static void __exit s3c2410fb_cleanup(void) -{ - platform_driver_unregister(&s3c2410fb_driver); - platform_driver_unregister(&s3c2412fb_driver); -} - -module_init(s3c2410fb_init); -module_exit(s3c2410fb_cleanup); - -MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>"); -MODULE_AUTHOR("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"); |