forked from Minki/linux
328 lines
8.2 KiB
C
328 lines
8.2 KiB
C
|
/*
|
||
|
|
* 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,
|
||
|
|
};
|
||
|
|
|
||
|
|
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");
|