+++ /dev/null
-/* 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");
projects / platform / kernel / linux-rpi.git / commitdiff