[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/drivers/video/imxfb.c b/ap/os/linux/linux-3.4.x/drivers/video/imxfb.c
new file mode 100644
index 0000000..f135dbe
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/video/imxfb.c
@@ -0,0 +1,964 @@
+/*
+ * Freescale i.MX Frame Buffer device driver
+ *
+ * Copyright (C) 2004 Sascha Hauer, Pengutronix
+ * Based on acornfb.c Copyright (C) Russell King.
+ *
+ * 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.
+ *
+ * Please direct your questions and comments on this driver to the following
+ * email address:
+ *
+ * linux-arm-kernel@lists.arm.linux.org.uk
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/interrupt.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include <linux/fb.h>
+#include <linux/delay.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>
+#include <mach/hardware.h>
+
+/*
+ * Complain if VAR is out of range.
+ */
+#define DEBUG_VAR 1
+
+#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) || \
+ (defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE) && \
+ defined(CONFIG_FB_IMX_MODULE))
+#define PWMR_BACKLIGHT_AVAILABLE
+#endif
+
+#define DRIVER_NAME "imx-fb"
+
+#define LCDC_SSA 0x00
+
+#define LCDC_SIZE 0x04
+#define SIZE_XMAX(x) ((((x) >> 4) & 0x3f) << 20)
+
+#define YMAX_MASK (cpu_is_mx1() ? 0x1ff : 0x3ff)
+#define SIZE_YMAX(y) ((y) & YMAX_MASK)
+
+#define LCDC_VPW 0x08
+#define VPW_VPW(x) ((x) & 0x3ff)
+
+#define LCDC_CPOS 0x0C
+#define CPOS_CC1 (1<<31)
+#define CPOS_CC0 (1<<30)
+#define CPOS_OP (1<<28)
+#define CPOS_CXP(x) (((x) & 3ff) << 16)
+
+#define LCDC_LCWHB 0x10
+#define LCWHB_BK_EN (1<<31)
+#define LCWHB_CW(w) (((w) & 0x1f) << 24)
+#define LCWHB_CH(h) (((h) & 0x1f) << 16)
+#define LCWHB_BD(x) ((x) & 0xff)
+
+#define LCDC_LCHCC 0x14
+
+#define LCDC_PCR 0x18
+
+#define LCDC_HCR 0x1C
+#define HCR_H_WIDTH(x) (((x) & 0x3f) << 26)
+#define HCR_H_WAIT_1(x) (((x) & 0xff) << 8)
+#define HCR_H_WAIT_2(x) ((x) & 0xff)
+
+#define LCDC_VCR 0x20
+#define VCR_V_WIDTH(x) (((x) & 0x3f) << 26)
+#define VCR_V_WAIT_1(x) (((x) & 0xff) << 8)
+#define VCR_V_WAIT_2(x) ((x) & 0xff)
+
+#define LCDC_POS 0x24
+#define POS_POS(x) ((x) & 1f)
+
+#define LCDC_LSCR1 0x28
+/* bit fields in imxfb.h */
+
+#define LCDC_PWMR 0x2C
+/* bit fields in imxfb.h */
+
+#define LCDC_DMACR 0x30
+/* bit fields in imxfb.h */
+
+#define LCDC_RMCR 0x34
+
+#define RMCR_LCDC_EN_MX1 (1<<1)
+
+#define RMCR_SELF_REF (1<<0)
+
+#define LCDC_LCDICR 0x38
+#define LCDICR_INT_SYN (1<<2)
+#define LCDICR_INT_CON (1)
+
+#define LCDC_LCDISR 0x40
+#define LCDISR_UDR_ERR (1<<3)
+#define LCDISR_ERR_RES (1<<2)
+#define LCDISR_EOF (1<<1)
+#define LCDISR_BOF (1<<0)
+
+/* Used fb-mode. Can be set on kernel command line, therefore file-static. */
+static const char *fb_mode;
+
+
+/*
+ * These are the bitfields for each
+ * display depth that we support.
+ */
+struct imxfb_rgb {
+ struct fb_bitfield red;
+ struct fb_bitfield green;
+ struct fb_bitfield blue;
+ struct fb_bitfield transp;
+};
+
+struct imxfb_info {
+ struct platform_device *pdev;
+ void __iomem *regs;
+ struct clk *clk;
+
+ /*
+ * These are the addresses we mapped
+ * the framebuffer memory region to.
+ */
+ dma_addr_t map_dma;
+ u_char *map_cpu;
+ u_int map_size;
+
+ u_char *screen_cpu;
+ dma_addr_t screen_dma;
+ u_int palette_size;
+
+ dma_addr_t dbar1;
+ dma_addr_t dbar2;
+
+ u_int pcr;
+ u_int pwmr;
+ u_int lscr1;
+ u_int dmacr;
+ u_int cmap_inverse:1,
+ cmap_static:1,
+ unused:30;
+
+ struct imx_fb_videomode *mode;
+ int num_modes;
+#ifdef PWMR_BACKLIGHT_AVAILABLE
+ struct backlight_device *bl;
+#endif
+
+ void (*lcd_power)(int);
+ void (*backlight_power)(int);
+};
+
+#define IMX_NAME "IMX"
+
+/*
+ * Minimum X and Y resolutions
+ */
+#define MIN_XRES 64
+#define MIN_YRES 64
+
+/* 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,},
+ .transp = {.offset = 0, .length = 0,},
+};
+
+static struct imxfb_rgb def_rgb_8 = {
+ .red = {.offset = 0, .length = 8,},
+ .green = {.offset = 0, .length = 8,},
+ .blue = {.offset = 0, .length = 8,},
+ .transp = {.offset = 0, .length = 0,},
+};
+
+static int imxfb_activate_var(struct fb_var_screeninfo *var,
+ struct fb_info *info);
+
+static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
+{
+ chan &= 0xffff;
+ chan >>= 16 - bf->length;
+ return chan << bf->offset;
+}
+
+static int imxfb_setpalettereg(u_int regno, u_int red, u_int green, u_int blue,
+ u_int trans, struct fb_info *info)
+{
+ struct imxfb_info *fbi = info->par;
+ u_int val, ret = 1;
+
+#define CNVT_TOHW(val,width) ((((val)<<(width))+0x7FFF-(val))>>16)
+ if (regno < fbi->palette_size) {
+ val = (CNVT_TOHW(red, 4) << 8) |
+ (CNVT_TOHW(green,4) << 4) |
+ CNVT_TOHW(blue, 4);
+
+ writel(val, fbi->regs + 0x800 + (regno << 2));
+ ret = 0;
+ }
+ return ret;
+}
+
+static int imxfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
+ u_int trans, struct fb_info *info)
+{
+ struct imxfb_info *fbi = info->par;
+ unsigned int val;
+ int ret = 1;
+
+ /*
+ * If inverse mode was selected, invert all the colours
+ * rather than the register number. The register number
+ * is what you poke into the framebuffer to produce the
+ * colour you requested.
+ */
+ if (fbi->cmap_inverse) {
+ red = 0xffff - red;
+ green = 0xffff - green;
+ blue = 0xffff - blue;
+ }
+
+ /*
+ * If greyscale is true, then we convert the RGB value
+ * to greyscale no mater what visual we are using.
+ */
+ if (info->var.grayscale)
+ red = green = blue = (19595 * red + 38470 * green +
+ 7471 * blue) >> 16;
+
+ switch (info->fix.visual) {
+ case FB_VISUAL_TRUECOLOR:
+ /*
+ * 12 or 16-bit True Colour. We encode the RGB value
+ * according to the RGB bitfield information.
+ */
+ 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;
+ ret = 0;
+ }
+ break;
+
+ case FB_VISUAL_STATIC_PSEUDOCOLOR:
+ case FB_VISUAL_PSEUDOCOLOR:
+ ret = imxfb_setpalettereg(regno, red, green, blue, trans, info);
+ break;
+ }
+
+ return ret;
+}
+
+static const struct imx_fb_videomode *imxfb_find_mode(struct imxfb_info *fbi)
+{
+ struct imx_fb_videomode *m;
+ int i;
+
+ for (i = 0, m = &fbi->mode[0]; i < fbi->num_modes; i++, m++) {
+ if (!strcmp(m->mode.name, fb_mode))
+ return m;
+ }
+ return NULL;
+}
+
+/*
+ * imxfb_check_var():
+ * Round up in the following order: bits_per_pixel, xres,
+ * yres, xres_virtual, yres_virtual, xoffset, yoffset, grayscale,
+ * bitfields, horizontal timing, vertical timing.
+ */
+static int imxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+ struct imxfb_info *fbi = info->par;
+ struct imxfb_rgb *rgb;
+ const struct imx_fb_videomode *imxfb_mode;
+ unsigned long lcd_clk;
+ unsigned long long tmp;
+ u32 pcr = 0;
+
+ if (var->xres < MIN_XRES)
+ var->xres = MIN_XRES;
+ if (var->yres < MIN_YRES)
+ var->yres = MIN_YRES;
+
+ imxfb_mode = imxfb_find_mode(fbi);
+ if (!imxfb_mode)
+ return -EINVAL;
+
+ var->xres = imxfb_mode->mode.xres;
+ var->yres = imxfb_mode->mode.yres;
+ var->bits_per_pixel = imxfb_mode->bpp;
+ var->pixclock = imxfb_mode->mode.pixclock;
+ var->hsync_len = imxfb_mode->mode.hsync_len;
+ var->left_margin = imxfb_mode->mode.left_margin;
+ var->right_margin = imxfb_mode->mode.right_margin;
+ var->vsync_len = imxfb_mode->mode.vsync_len;
+ var->upper_margin = imxfb_mode->mode.upper_margin;
+ var->lower_margin = imxfb_mode->mode.lower_margin;
+ var->sync = imxfb_mode->mode.sync;
+ var->xres_virtual = max(var->xres_virtual, var->xres);
+ var->yres_virtual = max(var->yres_virtual, var->yres);
+
+ pr_debug("var->bits_per_pixel=%d\n", var->bits_per_pixel);
+
+ 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 %luHz\n",
+ lcd_clk / pcr);
+ }
+
+ switch (var->bits_per_pixel) {
+ case 32:
+ pcr |= PCR_BPIX_18;
+ rgb = &def_rgb_18;
+ break;
+ case 16:
+ default:
+ if (cpu_is_mx1())
+ pcr |= PCR_BPIX_12;
+ else
+ pcr |= PCR_BPIX_16;
+
+ if (imxfb_mode->pcr & PCR_TFT)
+ rgb = &def_rgb_16_tft;
+ else
+ rgb = &def_rgb_16_stn;
+ break;
+ case 8:
+ pcr |= PCR_BPIX_8;
+ rgb = &def_rgb_8;
+ break;
+ }
+
+ /* add sync polarities */
+ pcr |= imxfb_mode->pcr & ~(0x3f | (7 << 25));
+
+ fbi->pcr = pcr;
+
+ /*
+ * Copy the RGB parameters for this display
+ * from the machine specific parameters.
+ */
+ 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,
+ var->transp.length);
+
+ pr_debug("RGBT offset = %d:%d:%d:%d\n",
+ var->red.offset, var->green.offset, var->blue.offset,
+ var->transp.offset);
+
+ return 0;
+}
+
+/*
+ * imxfb_set_par():
+ * Set the user defined part of the display for the specified console
+ */
+static int imxfb_set_par(struct fb_info *info)
+{
+ struct imxfb_info *fbi = info->par;
+ struct fb_var_screeninfo *var = &info->var;
+
+ 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;
+ else {
+ /*
+ * Some people have weird ideas about wanting static
+ * pseudocolor maps. I suspect their user space
+ * applications are broken.
+ */
+ info->fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
+ }
+
+ info->fix.line_length = var->xres_virtual * var->bits_per_pixel / 8;
+ fbi->palette_size = var->bits_per_pixel == 8 ? 256 : 16;
+
+ imxfb_activate_var(var, info);
+
+ return 0;
+}
+
+#ifdef PWMR_BACKLIGHT_AVAILABLE
+static int imxfb_bl_get_brightness(struct backlight_device *bl)
+{
+ struct imxfb_info *fbi = bl_get_data(bl);
+
+ return readl(fbi->regs + LCDC_PWMR) & 0xFF;
+}
+
+static int imxfb_bl_update_status(struct backlight_device *bl)
+{
+ struct imxfb_info *fbi = bl_get_data(bl);
+ int brightness = bl->props.brightness;
+
+ if (bl->props.power != FB_BLANK_UNBLANK)
+ brightness = 0;
+ if (bl->props.fb_blank != FB_BLANK_UNBLANK)
+ brightness = 0;
+
+ fbi->pwmr = (fbi->pwmr & ~0xFF) | brightness;
+
+ if (bl->props.fb_blank != FB_BLANK_UNBLANK)
+ clk_enable(fbi->clk);
+ writel(fbi->pwmr, fbi->regs + LCDC_PWMR);
+ if (bl->props.fb_blank != FB_BLANK_UNBLANK)
+ clk_disable(fbi->clk);
+
+ return 0;
+}
+
+static const struct backlight_ops imxfb_lcdc_bl_ops = {
+ .update_status = imxfb_bl_update_status,
+ .get_brightness = imxfb_bl_get_brightness,
+};
+
+static void imxfb_init_backlight(struct imxfb_info *fbi)
+{
+ struct backlight_properties props;
+ struct backlight_device *bl;
+
+ if (fbi->bl)
+ return;
+
+ memset(&props, 0, sizeof(struct backlight_properties));
+ props.max_brightness = 0xff;
+ props.type = BACKLIGHT_RAW;
+ writel(fbi->pwmr, fbi->regs + LCDC_PWMR);
+
+ bl = backlight_device_register("imxfb-bl", &fbi->pdev->dev, fbi,
+ &imxfb_lcdc_bl_ops, &props);
+ if (IS_ERR(bl)) {
+ dev_err(&fbi->pdev->dev, "error %ld on backlight register\n",
+ PTR_ERR(bl));
+ return;
+ }
+
+ fbi->bl = bl;
+ bl->props.power = FB_BLANK_UNBLANK;
+ bl->props.fb_blank = FB_BLANK_UNBLANK;
+ bl->props.brightness = imxfb_bl_get_brightness(bl);
+}
+
+static void imxfb_exit_backlight(struct imxfb_info *fbi)
+{
+ if (fbi->bl)
+ backlight_device_unregister(fbi->bl);
+}
+#endif
+
+static void imxfb_enable_controller(struct imxfb_info *fbi)
+{
+ pr_debug("Enabling LCD controller\n");
+
+ writel(fbi->screen_dma, fbi->regs + LCDC_SSA);
+
+ /* panning offset 0 (0 pixel offset) */
+ writel(0x00000000, fbi->regs + LCDC_POS);
+
+ /* disable hardware cursor */
+ writel(readl(fbi->regs + LCDC_CPOS) & ~(CPOS_CC0 | CPOS_CC1),
+ fbi->regs + LCDC_CPOS);
+
+ /*
+ * RMCR_LCDC_EN_MX1 is present on i.MX1 only, but doesn't hurt
+ * on other SoCs
+ */
+ writel(RMCR_LCDC_EN_MX1, fbi->regs + LCDC_RMCR);
+
+ clk_enable(fbi->clk);
+
+ if (fbi->backlight_power)
+ fbi->backlight_power(1);
+ if (fbi->lcd_power)
+ fbi->lcd_power(1);
+}
+
+static void imxfb_disable_controller(struct imxfb_info *fbi)
+{
+ pr_debug("Disabling LCD controller\n");
+
+ if (fbi->backlight_power)
+ fbi->backlight_power(0);
+ if (fbi->lcd_power)
+ fbi->lcd_power(0);
+
+ clk_disable(fbi->clk);
+
+ writel(0, fbi->regs + LCDC_RMCR);
+}
+
+static int imxfb_blank(int blank, struct fb_info *info)
+{
+ struct imxfb_info *fbi = info->par;
+
+ pr_debug("imxfb_blank: blank=%d\n", blank);
+
+ switch (blank) {
+ case FB_BLANK_POWERDOWN:
+ case FB_BLANK_VSYNC_SUSPEND:
+ case FB_BLANK_HSYNC_SUSPEND:
+ case FB_BLANK_NORMAL:
+ imxfb_disable_controller(fbi);
+ break;
+
+ case FB_BLANK_UNBLANK:
+ imxfb_enable_controller(fbi);
+ break;
+ }
+ return 0;
+}
+
+static struct fb_ops imxfb_ops = {
+ .owner = THIS_MODULE,
+ .fb_check_var = imxfb_check_var,
+ .fb_set_par = imxfb_set_par,
+ .fb_setcolreg = imxfb_setcolreg,
+ .fb_fillrect = cfb_fillrect,
+ .fb_copyarea = cfb_copyarea,
+ .fb_imageblit = cfb_imageblit,
+ .fb_blank = imxfb_blank,
+};
+
+/*
+ * imxfb_activate_var():
+ * Configures LCD Controller based on entries in var parameter. Settings are
+ * only written to the controller if changes were made.
+ */
+static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *info)
+{
+ struct imxfb_info *fbi = info->par;
+
+ pr_debug("var: xres=%d hslen=%d lm=%d rm=%d\n",
+ var->xres, var->hsync_len,
+ var->left_margin, var->right_margin);
+ pr_debug("var: yres=%d vslen=%d um=%d bm=%d\n",
+ var->yres, var->vsync_len,
+ var->upper_margin, var->lower_margin);
+
+#if DEBUG_VAR
+ if (var->xres < 16 || var->xres > 1024)
+ printk(KERN_ERR "%s: invalid xres %d\n",
+ info->fix.id, var->xres);
+ if (var->hsync_len < 1 || var->hsync_len > 64)
+ printk(KERN_ERR "%s: invalid hsync_len %d\n",
+ info->fix.id, var->hsync_len);
+ if (var->left_margin > 255)
+ printk(KERN_ERR "%s: invalid left_margin %d\n",
+ info->fix.id, var->left_margin);
+ if (var->right_margin > 255)
+ printk(KERN_ERR "%s: invalid right_margin %d\n",
+ info->fix.id, var->right_margin);
+ if (var->yres < 1 || var->yres > YMAX_MASK)
+ printk(KERN_ERR "%s: invalid yres %d\n",
+ info->fix.id, var->yres);
+ if (var->vsync_len > 100)
+ printk(KERN_ERR "%s: invalid vsync_len %d\n",
+ info->fix.id, var->vsync_len);
+ if (var->upper_margin > 63)
+ printk(KERN_ERR "%s: invalid upper_margin %d\n",
+ info->fix.id, var->upper_margin);
+ if (var->lower_margin > 255)
+ printk(KERN_ERR "%s: invalid lower_margin %d\n",
+ info->fix.id, var->lower_margin);
+#endif
+
+ /* physical screen start address */
+ writel(VPW_VPW(var->xres * var->bits_per_pixel / 8 / 4),
+ fbi->regs + LCDC_VPW);
+
+ 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) |
+ VCR_V_WAIT_1(var->lower_margin) |
+ VCR_V_WAIT_2(var->upper_margin),
+ fbi->regs + LCDC_VCR);
+
+ writel(SIZE_XMAX(var->xres) | SIZE_YMAX(var->yres),
+ fbi->regs + LCDC_SIZE);
+
+ writel(fbi->pcr, fbi->regs + LCDC_PCR);
+#ifndef PWMR_BACKLIGHT_AVAILABLE
+ writel(fbi->pwmr, fbi->regs + LCDC_PWMR);
+#endif
+ writel(fbi->lscr1, fbi->regs + LCDC_LSCR1);
+ writel(fbi->dmacr, fbi->regs + LCDC_DMACR);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+/*
+ * Power management hooks. Note that we won't be called from IRQ context,
+ * unlike the blank functions above, so we may sleep.
+ */
+static int imxfb_suspend(struct platform_device *dev, pm_message_t state)
+{
+ struct fb_info *info = platform_get_drvdata(dev);
+ struct imxfb_info *fbi = info->par;
+
+ pr_debug("%s\n", __func__);
+
+ imxfb_disable_controller(fbi);
+ return 0;
+}
+
+static int imxfb_resume(struct platform_device *dev)
+{
+ struct fb_info *info = platform_get_drvdata(dev);
+ struct imxfb_info *fbi = info->par;
+
+ pr_debug("%s\n", __func__);
+
+ imxfb_enable_controller(fbi);
+ return 0;
+}
+#else
+#define imxfb_suspend NULL
+#define imxfb_resume NULL
+#endif
+
+static int __init imxfb_init_fbinfo(struct platform_device *pdev)
+{
+ struct imx_fb_platform_data *pdata = pdev->dev.platform_data;
+ struct fb_info *info = dev_get_drvdata(&pdev->dev);
+ struct imxfb_info *fbi = info->par;
+ struct imx_fb_videomode *m;
+ int i;
+
+ pr_debug("%s\n",__func__);
+
+ info->pseudo_palette = kmalloc(sizeof(u32) * 16, GFP_KERNEL);
+ if (!info->pseudo_palette)
+ return -ENOMEM;
+
+ memset(fbi, 0, sizeof(struct imxfb_info));
+
+ strlcpy(info->fix.id, IMX_NAME, sizeof(info->fix.id));
+
+ info->fix.type = FB_TYPE_PACKED_PIXELS;
+ info->fix.type_aux = 0;
+ info->fix.xpanstep = 0;
+ info->fix.ypanstep = 0;
+ info->fix.ywrapstep = 0;
+ info->fix.accel = FB_ACCEL_NONE;
+
+ info->var.nonstd = 0;
+ info->var.activate = FB_ACTIVATE_NOW;
+ info->var.height = -1;
+ info->var.width = -1;
+ info->var.accel_flags = 0;
+ info->var.vmode = FB_VMODE_NONINTERLACED;
+
+ info->fbops = &imxfb_ops;
+ info->flags = FBINFO_FLAG_DEFAULT |
+ FBINFO_READS_FAST;
+ info->var.grayscale = pdata->cmap_greyscale;
+ fbi->cmap_inverse = pdata->cmap_inverse;
+ fbi->cmap_static = pdata->cmap_static;
+ fbi->lscr1 = pdata->lscr1;
+ fbi->dmacr = pdata->dmacr;
+ fbi->pwmr = pdata->pwmr;
+ fbi->lcd_power = pdata->lcd_power;
+ fbi->backlight_power = pdata->backlight_power;
+
+ for (i = 0, m = &pdata->mode[0]; i < pdata->num_modes; i++, m++)
+ info->fix.smem_len = max_t(size_t, info->fix.smem_len,
+ m->mode.xres * m->mode.yres * m->bpp / 8);
+
+ return 0;
+}
+
+static int __init imxfb_probe(struct platform_device *pdev)
+{
+ struct imxfb_info *fbi;
+ struct fb_info *info;
+ struct imx_fb_platform_data *pdata;
+ struct resource *res;
+ int ret, i;
+
+ dev_info(&pdev->dev, "i.MX Framebuffer driver\n");
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -ENODEV;
+
+ pdata = pdev->dev.platform_data;
+ if (!pdata) {
+ dev_err(&pdev->dev,"No platform_data available\n");
+ return -ENOMEM;
+ }
+
+ info = framebuffer_alloc(sizeof(struct imxfb_info), &pdev->dev);
+ if (!info)
+ return -ENOMEM;
+
+ fbi = info->par;
+
+ if (!fb_mode)
+ fb_mode = pdata->mode[0].mode.name;
+
+ platform_set_drvdata(pdev, info);
+
+ ret = imxfb_init_fbinfo(pdev);
+ if (ret < 0)
+ goto failed_init;
+
+ res = request_mem_region(res->start, resource_size(res),
+ DRIVER_NAME);
+ if (!res) {
+ ret = -EBUSY;
+ 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) {
+ dev_err(&pdev->dev, "Cannot map frame buffer registers\n");
+ goto failed_ioremap;
+ }
+
+ if (!pdata->fixed_screen_cpu) {
+ fbi->map_size = PAGE_ALIGN(info->fix.smem_len);
+ fbi->map_cpu = dma_alloc_writecombine(&pdev->dev,
+ fbi->map_size, &fbi->map_dma, GFP_KERNEL);
+
+ if (!fbi->map_cpu) {
+ dev_err(&pdev->dev, "Failed to allocate video RAM: %d\n", ret);
+ ret = -ENOMEM;
+ goto failed_map;
+ }
+
+ info->screen_base = fbi->map_cpu;
+ fbi->screen_cpu = fbi->map_cpu;
+ fbi->screen_dma = fbi->map_dma;
+ info->fix.smem_start = fbi->screen_dma;
+ } else {
+ /* Fixed framebuffer mapping enables location of the screen in eSRAM */
+ fbi->map_cpu = pdata->fixed_screen_cpu;
+ fbi->map_dma = pdata->fixed_screen_dma;
+ info->screen_base = fbi->map_cpu;
+ fbi->screen_cpu = fbi->map_cpu;
+ fbi->screen_dma = fbi->map_dma;
+ info->fix.smem_start = fbi->screen_dma;
+ }
+
+ if (pdata->init) {
+ ret = pdata->init(fbi->pdev);
+ if (ret)
+ goto failed_platform_init;
+ }
+
+ fbi->mode = pdata->mode;
+ fbi->num_modes = pdata->num_modes;
+
+ INIT_LIST_HEAD(&info->modelist);
+ for (i = 0; i < pdata->num_modes; i++)
+ fb_add_videomode(&pdata->mode[i].mode, &info->modelist);
+
+ /*
+ * This makes sure that our colour bitfield
+ * descriptors are correctly initialised.
+ */
+ imxfb_check_var(&info->var, info);
+
+ ret = fb_alloc_cmap(&info->cmap, 1 << info->var.bits_per_pixel, 0);
+ if (ret < 0)
+ goto failed_cmap;
+
+ imxfb_set_par(info);
+ ret = register_framebuffer(info);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to register framebuffer\n");
+ goto failed_register;
+ }
+
+ imxfb_enable_controller(fbi);
+ fbi->pdev = pdev;
+#ifdef PWMR_BACKLIGHT_AVAILABLE
+ imxfb_init_backlight(fbi);
+#endif
+
+ return 0;
+
+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:
+ iounmap(fbi->regs);
+failed_ioremap:
+ clk_put(fbi->clk);
+failed_getclock:
+ release_mem_region(res->start, resource_size(res));
+failed_req:
+ kfree(info->pseudo_palette);
+failed_init:
+ platform_set_drvdata(pdev, NULL);
+ framebuffer_release(info);
+ return ret;
+}
+
+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;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+ imxfb_disable_controller(fbi);
+
+#ifdef PWMR_BACKLIGHT_AVAILABLE
+ imxfb_exit_backlight(fbi);
+#endif
+ 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, resource_size(res));
+ clk_disable(fbi->clk);
+ clk_put(fbi->clk);
+
+ platform_set_drvdata(pdev, NULL);
+
+ return 0;
+}
+
+void imxfb_shutdown(struct platform_device * dev)
+{
+ struct fb_info *info = platform_get_drvdata(dev);
+ struct imxfb_info *fbi = info->par;
+ imxfb_disable_controller(fbi);
+}
+
+static struct platform_driver imxfb_driver = {
+ .suspend = imxfb_suspend,
+ .resume = imxfb_resume,
+ .remove = __devexit_p(imxfb_remove),
+ .shutdown = imxfb_shutdown,
+ .driver = {
+ .name = DRIVER_NAME,
+ },
+};
+
+static int imxfb_setup(void)
+{
+#ifndef MODULE
+ char *opt, *options = NULL;
+
+ if (fb_get_options("imxfb", &options))
+ return -ENODEV;
+
+ if (!options || !*options)
+ return 0;
+
+ while ((opt = strsep(&options, ",")) != NULL) {
+ if (!*opt)
+ continue;
+ else
+ fb_mode = opt;
+ }
+#endif
+ return 0;
+}
+
+int __init imxfb_init(void)
+{
+ int ret = imxfb_setup();
+
+ if (ret < 0)
+ return ret;
+
+ return platform_driver_probe(&imxfb_driver, imxfb_probe);
+}
+
+static void __exit imxfb_cleanup(void)
+{
+ platform_driver_unregister(&imxfb_driver);
+}
+
+module_init(imxfb_init);
+module_exit(imxfb_cleanup);
+
+MODULE_DESCRIPTION("Freescale i.MX framebuffer driver");
+MODULE_AUTHOR("Sascha Hauer, Pengutronix");
+MODULE_LICENSE("GPL");