diff options
Diffstat (limited to 'drivers/video/imxfb.c')
| -rw-r--r-- | drivers/video/imxfb.c | 982 |
1 files changed, 0 insertions, 982 deletions
diff --git a/drivers/video/imxfb.c b/drivers/video/imxfb.c deleted file mode 100644 index 5c363d026f6..00000000000 --- a/drivers/video/imxfb.c +++ /dev/null @@ -1,982 +0,0 @@ -/* - * 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) - -#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 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) - -#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_CW(w) (((w) & 0x1f) << 24) -#define LCWHB_CH(h) (((h) & 0x1f) << 16) -#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 - -#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 - -#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 -#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; - 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); - - writel(RMCR_LCDC_EN, 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 > 511) - 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: - clk_put(fbi->clk); -failed_getclock: - iounmap(fbi->regs); -failed_ioremap: - 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("Motorola i.MX framebuffer driver"); -MODULE_AUTHOR("Sascha Hauer, Pengutronix"); -MODULE_LICENSE("GPL"); |