diff options
Diffstat (limited to 'drivers/video/tx3912fb.c')
| -rw-r--r-- | drivers/video/tx3912fb.c | 328 |
1 files changed, 328 insertions, 0 deletions
diff --git a/drivers/video/tx3912fb.c b/drivers/video/tx3912fb.c new file mode 100644 index 0000000..39d9ca7 --- /dev/null +++ b/drivers/video/tx3912fb.c @@ -0,0 +1,328 @@ +/* + * 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.\n", + 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"); |
