diff options
Diffstat (limited to 'drivers/video/imxfb.c')
| -rw-r--r-- | drivers/video/imxfb.c | 680 |
1 files changed, 0 insertions, 680 deletions
diff --git a/drivers/video/imxfb.c b/drivers/video/imxfb.c deleted file mode 100644 index 11609552a38..00000000000 --- a/drivers/video/imxfb.c +++ /dev/null @@ -1,680 +0,0 @@ -/* - * linux/drivers/video/imxfb.c - * - * 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 - */ - -//#define DEBUG 1 - -#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/fb.h> -#include <linux/delay.h> -#include <linux/init.h> -#include <linux/ioport.h> -#include <linux/cpufreq.h> -#include <linux/platform_device.h> -#include <linux/dma-mapping.h> - -#include <asm/hardware.h> -#include <asm/io.h> -#include <asm/arch/imxfb.h> - -/* - * Complain if VAR is out of range. - */ -#define DEBUG_VAR 1 - -#include "imxfb.h" - -static struct imxfb_rgb def_rgb_16 = { - .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; -} - -#define LCDC_PALETTE(x) __REG2(IMX_LCDC_BASE+0x800, (x)<<2) -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); - - LCDC_PALETTE(regno) = val; - 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; -} - -/* - * 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; - int rgbidx; - - if (var->xres < MIN_XRES) - var->xres = MIN_XRES; - if (var->yres < MIN_YRES) - var->yres = MIN_YRES; - if (var->xres > fbi->max_xres) - var->xres = fbi->max_xres; - if (var->yres > fbi->max_yres) - var->yres = fbi->max_yres; - 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); - switch (var->bits_per_pixel) { - case 16: - rgbidx = RGB_16; - break; - case 8: - rgbidx = 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; - - 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; - - pr_debug("set_par\n"); - - if (var->bits_per_pixel == 16) - 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; -} - -static void imxfb_enable_controller(struct imxfb_info *fbi) -{ - pr_debug("Enabling LCD controller\n"); - - /* initialize LCDC */ - LCDC_RMCR &= ~RMCR_LCDC_EN; /* just to be safe... */ - - LCDC_SSA = fbi->screen_dma; - /* physical screen start address */ - LCDC_VPW = VPW_VPW(fbi->max_xres * fbi->max_bpp / 8 / 4); - - LCDC_POS = 0x00000000; /* panning offset 0 (0 pixel offset) */ - - /* disable hardware cursor */ - LCDC_CPOS &= ~(CPOS_CC0 | CPOS_CC1); - - LCDC_RMCR = RMCR_LCDC_EN; - - 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); - - LCDC_RMCR = 0; -} - -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 - - LCDC_HCR = HCR_H_WIDTH(var->hsync_len) | - HCR_H_WAIT_1(var->left_margin) | - HCR_H_WAIT_2(var->right_margin); - - LCDC_VCR = VCR_V_WIDTH(var->vsync_len) | - VCR_V_WAIT_1(var->upper_margin) | - VCR_V_WAIT_2(var->lower_margin); - - LCDC_SIZE = SIZE_XMAX(var->xres) | SIZE_YMAX(var->yres); - LCDC_PCR = fbi->pcr; - LCDC_PWMR = fbi->pwmr; - LCDC_LSCR1 = fbi->lscr1; - LCDC_DMACR = fbi->dmacr; - - return 0; -} - -static void imxfb_setup_gpio(struct imxfb_info *fbi) -{ - int width; - - LCDC_RMCR &= ~(RMCR_LCDC_EN | RMCR_SELF_REF); - - if( fbi->pcr & PCR_TFT ) - width = 16; - else - width = 1 << ((fbi->pcr >> 28) & 0x3); - - switch(width) { - case 16: - imx_gpio_mode(PD30_PF_LD15); - imx_gpio_mode(PD29_PF_LD14); - imx_gpio_mode(PD28_PF_LD13); - imx_gpio_mode(PD27_PF_LD12); - imx_gpio_mode(PD26_PF_LD11); - imx_gpio_mode(PD25_PF_LD10); - imx_gpio_mode(PD24_PF_LD9); - imx_gpio_mode(PD23_PF_LD8); - case 8: - imx_gpio_mode(PD22_PF_LD7); - imx_gpio_mode(PD21_PF_LD6); - imx_gpio_mode(PD20_PF_LD5); - imx_gpio_mode(PD19_PF_LD4); - case 4: - imx_gpio_mode(PD18_PF_LD3); - imx_gpio_mode(PD17_PF_LD2); - case 2: - imx_gpio_mode(PD16_PF_LD1); - case 1: - imx_gpio_mode(PD15_PF_LD0); - } - - /* initialize GPIOs */ - imx_gpio_mode(PD6_PF_LSCLK); - imx_gpio_mode(PD11_PF_CONTRAST); - imx_gpio_mode(PD14_PF_FLM_VSYNC); - imx_gpio_mode(PD13_PF_LP_HSYNC); - imx_gpio_mode(PD12_PF_ACD_OE); - - /* These are only needed for Sharp HR TFT displays */ - if (fbi->pcr & PCR_SHARP) { - imx_gpio_mode(PD7_PF_REV); - imx_gpio_mode(PD8_PF_CLS); - imx_gpio_mode(PD9_PF_PS); - imx_gpio_mode(PD10_PF_SPL_SPR); - } -} - -#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 imxfb_info *fbi = platform_get_drvdata(dev); - pr_debug("%s\n",__FUNCTION__); - - imxfb_disable_controller(fbi); - return 0; -} - -static int imxfb_resume(struct platform_device *dev) -{ - struct imxfb_info *fbi = platform_get_drvdata(dev); - pr_debug("%s\n",__FUNCTION__); - - imxfb_enable_controller(fbi); - return 0; -} -#else -#define imxfb_suspend NULL -#define imxfb_resume NULL -#endif - -static int __init imxfb_init_fbinfo(struct device *dev) -{ - struct imxfb_mach_info *inf = dev->platform_data; - struct fb_info *info = dev_get_drvdata(dev); - struct imxfb_info *fbi = info->par; - - pr_debug("%s\n",__FUNCTION__); - - info->pseudo_palette = kmalloc( sizeof(u32) * 16, GFP_KERNEL); - if (!info->pseudo_palette) - return -ENOMEM; - - memset(fbi, 0, sizeof(struct imxfb_info)); - fbi->dev = dev; - - 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; - - fbi->rgb[RGB_16] = &def_rgb_16; - fbi->rgb[RGB_8] = &def_rgb_8; - - fbi->max_xres = inf->xres; - info->var.xres = inf->xres; - info->var.xres_virtual = inf->xres; - fbi->max_yres = inf->yres; - info->var.yres = inf->yres; - info->var.yres_virtual = inf->yres; - fbi->max_bpp = inf->bpp; - info->var.bits_per_pixel = inf->bpp; - info->var.nonstd = inf->nonstd; - info->var.pixclock = inf->pixclock; - info->var.hsync_len = inf->hsync_len; - info->var.left_margin = inf->left_margin; - info->var.right_margin = inf->right_margin; - info->var.vsync_len = inf->vsync_len; - info->var.upper_margin = inf->upper_margin; - info->var.lower_margin = inf->lower_margin; - info->var.sync = inf->sync; - info->var.grayscale = inf->cmap_greyscale; - fbi->cmap_inverse = inf->cmap_inverse; - fbi->cmap_static = inf->cmap_static; - fbi->pcr = inf->pcr; - fbi->lscr1 = inf->lscr1; - fbi->dmacr = inf->dmacr; - fbi->pwmr = inf->pwmr; - fbi->lcd_power = inf->lcd_power; - fbi->backlight_power = inf->backlight_power; - info->fix.smem_len = fbi->max_xres * fbi->max_yres * - fbi->max_bpp / 8; - - return 0; -} - -/* - * Allocates the DRAM memory for the frame buffer. This buffer is - * remapped into a non-cached, non-buffered, memory region to - * allow 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 __init imxfb_map_video_memory(struct fb_info *info) -{ - struct imxfb_info *fbi = info->par; - - fbi->map_size = PAGE_ALIGN(info->fix.smem_len); - fbi->map_cpu = dma_alloc_writecombine(fbi->dev, fbi->map_size, - &fbi->map_dma,GFP_KERNEL); - - if (fbi->map_cpu) { - 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; - } - - return fbi->map_cpu ? 0 : -ENOMEM; -} - -static int __init imxfb_probe(struct platform_device *pdev) -{ - struct imxfb_info *fbi; - struct fb_info *info; - struct imxfb_mach_info *inf; - struct resource *res; - int ret; - - printk("i.MX Framebuffer driver\n"); - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if(!res) - return -ENODEV; - - inf = pdev->dev.platform_data; - if(!inf) { - 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; - - platform_set_drvdata(pdev, info); - - ret = imxfb_init_fbinfo(&pdev->dev); - if( ret < 0 ) - goto failed_init; - - res = request_mem_region(res->start, res->end - res->start + 1, "IMXFB"); - if (!res) { - ret = -EBUSY; - goto failed_regs; - } - - if (!inf->fixed_screen_cpu) { - ret = imxfb_map_video_memory(info); - if (ret) { - dev_err(&pdev->dev, "Failed to allocate video RAM: %d\n", ret); - ret = -ENOMEM; - goto failed_map; - } - } else { - /* Fixed framebuffer mapping enables location of the screen in eSRAM */ - fbi->map_cpu = inf->fixed_screen_cpu; - fbi->map_dma = inf->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; - } - - /* - * 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_setup_gpio(fbi); - - 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); - - return 0; - -failed_register: - fb_dealloc_cmap(&info->cmap); -failed_cmap: - if (!inf->fixed_screen_cpu) - dma_free_writecombine(&pdev->dev,fbi->map_size,fbi->map_cpu, - fbi->map_dma); -failed_map: - kfree(info->pseudo_palette); -failed_regs: - release_mem_region(res->start, res->end - res->start); -failed_init: - platform_set_drvdata(pdev, NULL); - framebuffer_release(info); - return ret; -} - -static int imxfb_remove(struct platform_device *pdev) -{ - 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); - - unregister_framebuffer(info); - - fb_dealloc_cmap(&info->cmap); - kfree(info->pseudo_palette); - framebuffer_release(info); - - release_mem_region(res->start, res->end - res->start + 1); - 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 = { - .probe = imxfb_probe, - .suspend = imxfb_suspend, - .resume = imxfb_resume, - .remove = imxfb_remove, - .shutdown = imxfb_shutdown, - .driver = { - .name = "imx-fb", - }, -}; - -int __init imxfb_init(void) -{ - return platform_driver_register(&imxfb_driver); -} - -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"); |