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drivers/video/tx3912fb.c
8.21 KB
1da177e4c Linux-2.6.12-rc2 |
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/* * drivers/video/tx3912fb.c * * Copyright (C) 1999 Harald Koerfgen * Copyright (C) 2001 Steven Hill (sjhill@realitydiluted.com) * * 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. * * Framebuffer for LCD controller in TMPR3912/05 and PR31700 processors */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/errno.h> #include <linux/string.h> #include <linux/tty.h> #include <linux/delay.h> #include <linux/interrupt.h> #include <linux/init.h> #include <linux/pm.h> #include <linux/fb.h> #include <asm/io.h> #include <asm/bootinfo.h> #include <asm/uaccess.h> #include <asm/tx3912.h> #include <video/tx3912.h> /* * Frame buffer, palette and console structures */ static struct fb_info fb_info; static u32 cfb8[16]; static struct fb_fix_screeninfo tx3912fb_fix __initdata = { .id = "tx3912fb", .smem_len = ((240 * 320)/2), .type = FB_TYPE_PACKED_PIXELS, .visual = FB_VISUAL_TRUECOLOR, .xpanstep = 1, .ypanstep = 1, .ywrapstep = 1, .accel = FB_ACCEL_NONE, }; static struct fb_var_screeninfo tx3912fb_var = { .xres = 240, .yres = 320, .xres_virtual = 240, .yres_virtual = 320, .bits_per_pixel =4, .red = { 0, 4, 0 }, /* ??? */ .green = { 0, 4, 0 }, .blue = { 0, 4, 0 }, .activate = FB_ACTIVATE_NOW, .width = -1, .height = -1, .pixclock = 20000, .left_margin = 64, .right_margin = 64, .upper_margin = 32, .lower_margin = 32, .hsync_len = 64, .vsync_len = 2, .vmode = FB_VMODE_NONINTERLACED, }; /* * Interface used by the world */ int tx3912fb_init(void); static int tx3912fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, u_int transp, struct fb_info *info); /* * Macros */ #define get_line_length(xres_virtual, bpp) \ (u_long) (((int) xres_virtual * (int) bpp + 7) >> 3) /* * Frame buffer operations structure used by console driver */ static struct fb_ops tx3912fb_ops = { .owner = THIS_MODULE, .fb_setcolreg = tx3912fb_setcolreg, .fb_fillrect = cfb_fillrect, .fb_copyarea = cfb_copyarea, .fb_imageblit = cfb_imageblit, .fb_cursor = soft_cursor, }; static int tx3912fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) { /* * Memory limit */ line_length = get_line_length(var->xres_virtual, var->bits_per_pixel); if ((line_length * var->yres_virtual) > info->fix.smem_len) return -ENOMEM; return 0; } static int tx3912fb_set_par(struct fb_info *info) { u_long tx3912fb_paddr = 0; /* Disable the video logic */ outl(inl(TX3912_VIDEO_CTRL1) & ~(TX3912_VIDEO_CTRL1_ENVID | TX3912_VIDEO_CTRL1_DISPON), TX3912_VIDEO_CTRL1); udelay(200); /* Set start address for DMA transfer */ outl(tx3912fb_paddr, TX3912_VIDEO_CTRL3); /* Set end address for DMA transfer */ outl((tx3912fb_paddr + tx3912fb_fix.smem_len + 1), TX3912_VIDEO_CTRL4); /* Set the pixel depth */ switch (info->var.bits_per_pixel) { case 1: /* Monochrome */ outl(inl(TX3912_VIDEO_CTRL1) & ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1); info->fix.visual = FB_VISUAL_MONO10; break; case 4: /* 4-bit gray */ outl(inl(TX3912_VIDEO_CTRL1) & ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1); outl(inl(TX3912_VIDEO_CTRL1) | TX3912_VIDEO_CTRL1_BITSEL_4BIT_GRAY, TX3912_VIDEO_CTRL1); info->fix.visual = FB_VISUAL_TRUECOLOR; break; case 8: /* 8-bit color */ outl(inl(TX3912_VIDEO_CTRL1) & ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1); outl(inl(TX3912_VIDEO_CTRL1) | TX3912_VIDEO_CTRL1_BITSEL_8BIT_COLOR, TX3912_VIDEO_CTRL1); info->fix.visual = FB_VISUAL_TRUECOLOR; break; case 2: default: /* 2-bit gray */ outl(inl(TX3912_VIDEO_CTRL1) & ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1); outl(inl(TX3912_VIDEO_CTRL1) | TX3912_VIDEO_CTRL1_BITSEL_2BIT_GRAY, TX3912_VIDEO_CTRL1); info->fix.visual = FB_VISUAL_PSEUDOCOLOR; break; } /* Enable the video clock */ outl(inl(TX3912_CLK_CTRL) | TX3912_CLK_CTRL_ENVIDCLK, TX3912_CLK_CTRL); /* Unfreeze video logic and enable DF toggle */ outl(inl(TX3912_VIDEO_CTRL1) & ~(TX3912_VIDEO_CTRL1_ENFREEZEFRAME | TX3912_VIDEO_CTRL1_DFMODE) , TX3912_VIDEO_CTRL1); udelay(200); /* Enable the video logic */ outl(inl(TX3912_VIDEO_CTRL1) | (TX3912_VIDEO_CTRL1_ENVID | TX3912_VIDEO_CTRL1_DISPON), TX3912_VIDEO_CTRL1); info->fix.line_length = get_line_length(var->xres_virtual, var->bits_per_pixel); } /* * Set a single color register */ static int tx3912fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, u_int transp, struct fb_info *info) { if (regno > 255) return 1; if (regno < 16) ((u32 *)(info->pseudo_palette))[regno] = ((red & 0xe000) >> 8) | ((green & 0xe000) >> 11) | ((blue & 0xc000) >> 14); return 0; } int __init tx3912fb_setup(char *options); /* * Initialization of the framebuffer */ int __init tx3912fb_init(void) { u_long tx3912fb_paddr = 0; int size = (info->var.bits_per_pixel == 8) ? 256 : 16; char *option = NULL; if (fb_get_options("tx3912fb", &option)) return -ENODEV; tx3912fb_setup(option); /* Disable the video logic */ outl(inl(TX3912_VIDEO_CTRL1) & ~(TX3912_VIDEO_CTRL1_ENVID | TX3912_VIDEO_CTRL1_DISPON), TX3912_VIDEO_CTRL1); udelay(200); /* Set start address for DMA transfer */ outl(tx3912fb_paddr, TX3912_VIDEO_CTRL3); /* Set end address for DMA transfer */ outl((tx3912fb_paddr + tx3912fb_fix.smem_len + 1), TX3912_VIDEO_CTRL4); /* Set the pixel depth */ switch (tx3912fb_var.bits_per_pixel) { case 1: /* Monochrome */ outl(inl(TX3912_VIDEO_CTRL1) & ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1); tx3912fb_fix.visual = FB_VISUAL_MONO10; break; case 4: /* 4-bit gray */ outl(inl(TX3912_VIDEO_CTRL1) & ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1); outl(inl(TX3912_VIDEO_CTRL1) | TX3912_VIDEO_CTRL1_BITSEL_4BIT_GRAY, TX3912_VIDEO_CTRL1); tx3912fb_fix.visual = FB_VISUAL_TRUECOLOR; tx3912fb_fix.grayscale = 1; break; case 8: /* 8-bit color */ outl(inl(TX3912_VIDEO_CTRL1) & ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1); outl(inl(TX3912_VIDEO_CTRL1) | TX3912_VIDEO_CTRL1_BITSEL_8BIT_COLOR, TX3912_VIDEO_CTRL1); tx3912fb_fix.visual = FB_VISUAL_TRUECOLOR; break; case 2: default: /* 2-bit gray */ outl(inl(TX3912_VIDEO_CTRL1) & ~TX3912_VIDEO_CTRL1_BITSEL_MASK, TX3912_VIDEO_CTRL1); outl(inl(TX3912_VIDEO_CTRL1) | TX3912_VIDEO_CTRL1_BITSEL_2BIT_GRAY, TX3912_VIDEO_CTRL1); tx3912fb_fix.visual = FB_VISUAL_PSEUDOCOLOR; tx3912fb_fix.grayscale = 1; break; } /* Enable the video clock */ outl(inl(TX3912_CLK_CTRL) | TX3912_CLK_CTRL_ENVIDCLK, TX3912_CLK_CTRL); /* Unfreeze video logic and enable DF toggle */ outl(inl(TX3912_VIDEO_CTRL1) & ~(TX3912_VIDEO_CTRL1_ENFREEZEFRAME | TX3912_VIDEO_CTRL1_DFMODE), TX3912_VIDEO_CTRL1); udelay(200); /* Clear the framebuffer */ memset((void *) tx3912fb_fix.smem_start, 0xff, tx3912fb_fix.smem_len); udelay(200); /* Enable the video logic */ outl(inl(TX3912_VIDEO_CTRL1) | (TX3912_VIDEO_CTRL1_ENVID | TX3912_VIDEO_CTRL1_DISPON), TX3912_VIDEO_CTRL1); /* * Memory limit */ tx3912fb_fix.line_length = get_line_length(tx3912fb_var.xres_virtual, tx3912fb_var.bits_per_pixel); if ((tx3912fb_fix.line_length * tx3912fb_var.yres_virtual) > tx3912fb_fix.smem_len) return -ENOMEM; fb_info.fbops = &tx3912fb_ops; fb_info.var = tx3912fb_var; fb_info.fix = tx3912fb_fix; fb_info.pseudo_palette = pseudo_palette; fb_info.flags = FBINFO_DEFAULT; /* Clear the framebuffer */ memset((void *) fb_info.fix.smem_start, 0xff, fb_info.fix.smem_len); udelay(200); fb_alloc_cmap(&info->cmap, size, 0); if (register_framebuffer(&fb_info) < 0) return -1; printk(KERN_INFO "fb%d: TX3912 frame buffer using %uKB. ", fb_info.node, (u_int) (fb_info.fix.smem_len >> 10)); return 0; } int __init tx3912fb_setup(char *options) { char *this_opt; if (!options || !*options) return 0; while ((this_opt = strsep(&options, ","))) { if (!strncmp(options, "bpp:", 4)) tx3912fb_var.bits_per_pixel = simple_strtoul(options+4, NULL, 0); } return 0; } module_init(tx3912fb_init); MODULE_LICENSE("GPL"); |