* linux-arm-kernel@lists.arm.linux.org.uk
*/
-
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/cpufreq.h>
+#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#include <linux/io.h>
+#include <linux/math64.h>
#include <mach/imxfb.h>
#define LCDC_SIZE 0x04
#define SIZE_XMAX(x) ((((x) >> 4) & 0x3f) << 20)
+
+#ifdef CONFIG_ARCH_MX1
#define SIZE_YMAX(y) ((y) & 0x1ff)
+#else
+#define SIZE_YMAX(y) ((y) & 0x3ff)
+#endif
#define LCDC_VPW 0x08
#define VPW_VPW(x) ((x) & 0x3ff)
#define CPOS_CC0 (1<<30)
#define CPOS_OP (1<<28)
#define CPOS_CXP(x) (((x) & 3ff) << 16)
+
+#ifdef CONFIG_ARCH_MX1
#define CPOS_CYP(y) ((y) & 0x1ff)
+#else
+#define CPOS_CYP(y) ((y) & 0x3ff)
+#endif
#define LCDC_LCWHB 0x10
#define LCWHB_BK_EN (1<<31)
#define LCWHB_BD(x) ((x) & 0xff)
#define LCDC_LCHCC 0x14
+
+#ifdef CONFIG_ARCH_MX1
#define LCHCC_CUR_COL_R(r) (((r) & 0x1f) << 11)
#define LCHCC_CUR_COL_G(g) (((g) & 0x3f) << 5)
#define LCHCC_CUR_COL_B(b) ((b) & 0x1f)
+#else
+#define LCHCC_CUR_COL_R(r) (((r) & 0x3f) << 12)
+#define LCHCC_CUR_COL_G(g) (((g) & 0x3f) << 6)
+#define LCHCC_CUR_COL_B(b) ((b) & 0x3f)
+#endif
#define LCDC_PCR 0x18
/* bit fields in imxfb.h */
#define LCDC_RMCR 0x34
+
+#ifdef CONFIG_ARCH_MX1
#define RMCR_LCDC_EN (1<<1)
+#else
+#define RMCR_LCDC_EN 0
+#endif
+
#define RMCR_SELF_REF (1<<0)
#define LCDC_LCDICR 0x38
struct fb_bitfield transp;
};
-#define RGB_16 (0)
-#define RGB_8 (1)
-#define NR_RGB 2
-
struct imxfb_info {
struct platform_device *pdev;
void __iomem *regs;
-
- struct imxfb_rgb *rgb[NR_RGB];
+ struct clk *clk;
u_int max_bpp;
u_int max_xres;
#define MIN_XRES 64
#define MIN_YRES 64
-static struct imxfb_rgb def_rgb_16 = {
+/* Actually this really is 18bit support, the lowest 2 bits of each colour
+ * are unused in hardware. We claim to have 24bit support to make software
+ * like X work, which does not support 18bit.
+ */
+static struct imxfb_rgb def_rgb_18 = {
+ .red = {.offset = 16, .length = 8,},
+ .green = {.offset = 8, .length = 8,},
+ .blue = {.offset = 0, .length = 8,},
+ .transp = {.offset = 0, .length = 0,},
+};
+
+static struct imxfb_rgb def_rgb_16_tft = {
+ .red = {.offset = 11, .length = 5,},
+ .green = {.offset = 5, .length = 6,},
+ .blue = {.offset = 0, .length = 5,},
+ .transp = {.offset = 0, .length = 0,},
+};
+
+static struct imxfb_rgb def_rgb_16_stn = {
.red = {.offset = 8, .length = 4,},
.green = {.offset = 4, .length = 4,},
.blue = {.offset = 0, .length = 4,},
static int imxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
struct imxfb_info *fbi = info->par;
- int rgbidx;
+ struct imxfb_rgb *rgb;
if (var->xres < MIN_XRES)
var->xres = MIN_XRES;
pr_debug("var->bits_per_pixel=%d\n", var->bits_per_pixel);
switch (var->bits_per_pixel) {
+ case 32:
+ rgb = &def_rgb_18;
+ break;
case 16:
- rgbidx = RGB_16;
+ default:
+ if (fbi->pcr & PCR_TFT)
+ rgb = &def_rgb_16_tft;
+ else
+ rgb = &def_rgb_16_stn;
break;
case 8:
- rgbidx = RGB_8;
+ rgb = &def_rgb_8;
break;
- default:
- rgbidx = RGB_16;
}
/*
* Copy the RGB parameters for this display
* from the machine specific parameters.
*/
- var->red = fbi->rgb[rgbidx]->red;
- var->green = fbi->rgb[rgbidx]->green;
- var->blue = fbi->rgb[rgbidx]->blue;
- var->transp = fbi->rgb[rgbidx]->transp;
+ var->red = rgb->red;
+ var->green = rgb->green;
+ var->blue = rgb->blue;
+ var->transp = rgb->transp;
pr_debug("RGBT length = %d:%d:%d:%d\n",
var->red.length, var->green.length, var->blue.length,
struct imxfb_info *fbi = info->par;
struct fb_var_screeninfo *var = &info->var;
- pr_debug("set_par\n");
-
- if (var->bits_per_pixel == 16)
+ if (var->bits_per_pixel == 16 || var->bits_per_pixel == 32)
info->fix.visual = FB_VISUAL_TRUECOLOR;
else if (!fbi->cmap_static)
info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
{
pr_debug("Enabling LCD controller\n");
- /* initialize LCDC */
- writel(readl(fbi->regs + LCDC_RMCR) & ~RMCR_LCDC_EN,
- fbi->regs + LCDC_RMCR); /* just to be safe... */
-
writel(fbi->screen_dma, fbi->regs + LCDC_SSA);
/* physical screen start address */
writel(RMCR_LCDC_EN, fbi->regs + LCDC_RMCR);
+ clk_enable(fbi->clk);
+
if (fbi->backlight_power)
fbi->backlight_power(1);
if (fbi->lcd_power)
if (fbi->lcd_power)
fbi->lcd_power(0);
+ clk_disable(fbi->clk);
+
writel(0, fbi->regs + LCDC_RMCR);
}
static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
struct imxfb_info *fbi = info->par;
+ unsigned int pcr, lcd_clk;
+ unsigned long long tmp;
+
pr_debug("var: xres=%d hslen=%d lm=%d rm=%d\n",
var->xres, var->hsync_len,
var->left_margin, var->right_margin);
info->fix.id, var->lower_margin);
#endif
- writel(HCR_H_WIDTH(var->hsync_len) |
- HCR_H_WAIT_1(var->right_margin) |
- HCR_H_WAIT_2(var->left_margin),
+ writel(HCR_H_WIDTH(var->hsync_len - 1) |
+ HCR_H_WAIT_1(var->right_margin - 1) |
+ HCR_H_WAIT_2(var->left_margin - 3),
fbi->regs + LCDC_HCR);
writel(VCR_V_WIDTH(var->vsync_len) |
writel(SIZE_XMAX(var->xres) | SIZE_YMAX(var->yres),
fbi->regs + LCDC_SIZE);
- writel(fbi->pcr, fbi->regs + LCDC_PCR);
+
+ lcd_clk = clk_get_rate(fbi->clk);
+ tmp = var->pixclock * (unsigned long long)lcd_clk;
+ do_div(tmp, 1000000);
+ if (do_div(tmp, 1000000) > 500000)
+ tmp++;
+ pcr = (unsigned int)tmp;
+ if (--pcr > 0x3F) {
+ pcr = 0x3F;
+ printk(KERN_WARNING "Must limit pixel clock to %uHz\n",
+ lcd_clk / pcr);
+ }
+
+ /* add sync polarities */
+ pcr |= fbi->pcr & ~0x3F;
+
+ writel(pcr, fbi->regs + LCDC_PCR);
writel(fbi->pwmr, fbi->regs + LCDC_PWMR);
writel(fbi->lscr1, fbi->regs + LCDC_LSCR1);
writel(fbi->dmacr, fbi->regs + LCDC_DMACR);
info->flags = FBINFO_FLAG_DEFAULT |
FBINFO_READS_FAST;
- fbi->rgb[RGB_16] = &def_rgb_16;
- fbi->rgb[RGB_8] = &def_rgb_8;
-
fbi->max_xres = pdata->xres;
info->var.xres = pdata->xres;
info->var.xres_virtual = pdata->xres;
goto failed_req;
}
+ fbi->clk = clk_get(&pdev->dev, NULL);
+ if (IS_ERR(fbi->clk)) {
+ ret = PTR_ERR(fbi->clk);;
+ dev_err(&pdev->dev, "unable to get clock: %d\n", ret);
+ goto failed_getclock;
+ }
+
fbi->regs = ioremap(res->start, resource_size(res));
if (fbi->regs == NULL) {
printk(KERN_ERR"Cannot map frame buffer registers\n");
info->fix.smem_start = fbi->screen_dma;
}
+ if (pdata->init) {
+ ret = pdata->init(fbi->pdev);
+ if (ret)
+ goto failed_platform_init;
+ }
+
/*
* This makes sure that our colour bitfield
* descriptors are correctly initialised.
failed_register:
fb_dealloc_cmap(&info->cmap);
failed_cmap:
+ if (pdata->exit)
+ pdata->exit(fbi->pdev);
+failed_platform_init:
if (!pdata->fixed_screen_cpu)
dma_free_writecombine(&pdev->dev,fbi->map_size,fbi->map_cpu,
fbi->map_dma);
failed_map:
+ clk_put(fbi->clk);
+failed_getclock:
iounmap(fbi->regs);
failed_ioremap:
release_mem_region(res->start, res->end - res->start);
static int __devexit imxfb_remove(struct platform_device *pdev)
{
+ struct imx_fb_platform_data *pdata;
struct fb_info *info = platform_get_drvdata(pdev);
struct imxfb_info *fbi = info->par;
struct resource *res;
unregister_framebuffer(info);
+ pdata = pdev->dev.platform_data;
+ if (pdata->exit)
+ pdata->exit(fbi->pdev);
+
fb_dealloc_cmap(&info->cmap);
kfree(info->pseudo_palette);
framebuffer_release(info);
iounmap(fbi->regs);
release_mem_region(res->start, res->end - res->start + 1);
+ clk_disable(fbi->clk);
+ clk_put(fbi->clk);
+
platform_set_drvdata(pdev, NULL);
return 0;
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