/* 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. */ #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 <asm/div64.h> #include <asm/mach/map.h> #include <mach/regs-lcd.h> #include <mach/regs-gpio.h> #include <mach/fb.h> #ifdef CONFIG_PM #include <linux/pm.h> #endif #include "s3c2410fb.h" /* Debugging stuff */ #ifdef CONFIG_FB_S3C2410_DEBUG static int debug = 1; #else static int debug; #endif #define dprintk(msg...) if (debug) printk(KERN_DEBUG "s3c2410fb: " msg); /* 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 = fbi->dev->platform_data; 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 (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 __devinit 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_writecombine(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_writecombine(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; 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 = fbi->dev->platform_data; 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(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); 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_CPU_FREQ 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 = platform_get_drvdata(to_platform_device(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 __devinit 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 = pdev->dev.platform_data; 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)) { printk(KERN_ERR "failed to get lcd clock source\n"); ret = PTR_ERR(info->clk); goto release_irq; } clk_enable(info->clk); dprintk("got and enabled clock\n"); usleep_range(1000, 1000); 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) { printk(KERN_ERR "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) { printk(KERN_ERR "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) printk(KERN_ERR "failed to add debug attribute\n"); printk(KERN_INFO "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(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: platform_set_drvdata(pdev, NULL); framebuffer_release(fbinfo); return ret; } static int __devinit s3c2410fb_probe(struct platform_device *pdev) { return s3c24xxfb_probe(pdev, DRV_S3C2410); } static int __devinit s3c2412fb_probe(struct platform_device *pdev) { return s3c24xxfb_probe(pdev, DRV_S3C2412); } /* * Cleanup */ static int __devexit 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, 1000); s3c2410fb_unmap_video_memory(fbinfo); if (info->clk) { clk_disable(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)); platform_set_drvdata(pdev, NULL); 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, 1000); 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); usleep_range(1000, 1000); 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 = __devexit_p(s3c2410fb_remove), .suspend = s3c2410fb_suspend, .resume = s3c2410fb_resume, .driver = { .name = "s3c2410-lcd", .owner = THIS_MODULE, }, }; static struct platform_driver s3c2412fb_driver = { .probe = s3c2412fb_probe, .remove = __devexit_p(s3c2410fb_remove), .suspend = s3c2410fb_suspend, .resume = s3c2410fb_resume, .driver = { .name = "s3c2412-lcd", .owner = THIS_MODULE, }, }; 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>, " "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");