- 根目录:
- drivers
- video
- hitfb.c
/*
* linux/drivers/video/hitfb.c -- Hitachi LCD frame buffer device
*
* (C) 1999 Mihai Spatar
* (C) 2000 YAEGASHI Takeshi
* (C) 2003, 2004 Paul Mundt
* (C) 2003, 2004, 2006 Andriy Skulysh
*
* 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.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/fb.h>
#include <asm/machvec.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
#include <asm/io.h>
#include <asm/hd64461.h>
#include <cpu/dac.h>
#define WIDTH 640
static struct fb_var_screeninfo hitfb_var = {
.activate = FB_ACTIVATE_NOW,
.height = -1,
.width = -1,
.vmode = FB_VMODE_NONINTERLACED,
};
static struct fb_fix_screeninfo hitfb_fix = {
.id = "Hitachi HD64461",
.type = FB_TYPE_PACKED_PIXELS,
.accel = FB_ACCEL_NONE,
};
static inline void hitfb_accel_wait(void)
{
while (fb_readw(HD64461_GRCFGR) & HD64461_GRCFGR_ACCSTATUS) ;
}
static inline void hitfb_accel_start(int truecolor)
{
if (truecolor) {
fb_writew(6, HD64461_GRCFGR);
} else {
fb_writew(7, HD64461_GRCFGR);
}
}
static inline void hitfb_accel_set_dest(int truecolor, u16 dx, u16 dy,
u16 width, u16 height)
{
u32 saddr = WIDTH * dy + dx;
if (truecolor)
saddr <<= 1;
fb_writew(width-1, HD64461_BBTDWR);
fb_writew(height-1, HD64461_BBTDHR);
fb_writew(saddr & 0xffff, HD64461_BBTDSARL);
fb_writew(saddr >> 16, HD64461_BBTDSARH);
}
static inline void hitfb_accel_bitblt(int truecolor, u16 sx, u16 sy, u16 dx,
u16 dy, u16 width, u16 height, u16 rop,
u32 mask_addr)
{
u32 saddr, daddr;
u32 maddr = 0;
height--;
width--;
fb_writew(rop, HD64461_BBTROPR);
if ((sy < dy) || ((sy == dy) && (sx <= dx))) {
saddr = WIDTH * (sy + height) + sx + width;
daddr = WIDTH * (dy + height) + dx + width;
if (mask_addr) {
if (truecolor)
maddr = ((width >> 3) + 1) * (height + 1) - 1;
else
maddr =
(((width >> 4) + 1) * (height + 1) - 1) * 2;
fb_writew((1 << 5) | 1, HD64461_BBTMDR);
} else
fb_writew(1, HD64461_BBTMDR);
} else {
saddr = WIDTH * sy + sx;
daddr = WIDTH * dy + dx;
if (mask_addr) {
fb_writew((1 << 5), HD64461_BBTMDR);
} else {
fb_writew(0, HD64461_BBTMDR);
}
}
if (truecolor) {
saddr <<= 1;
daddr <<= 1;
}
fb_writew(width, HD64461_BBTDWR);
fb_writew(height, HD64461_BBTDHR);
fb_writew(saddr & 0xffff, HD64461_BBTSSARL);
fb_writew(saddr >> 16, HD64461_BBTSSARH);
fb_writew(daddr & 0xffff, HD64461_BBTDSARL);
fb_writew(daddr >> 16, HD64461_BBTDSARH);
if (mask_addr) {
maddr += mask_addr;
fb_writew(maddr & 0xffff, HD64461_BBTMARL);
fb_writew(maddr >> 16, HD64461_BBTMARH);
}
hitfb_accel_start(truecolor);
}
static void hitfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect)
{
if (rect->rop != ROP_COPY)
cfb_fillrect(p, rect);
else {
hitfb_accel_wait();
fb_writew(0x00f0, HD64461_BBTROPR);
fb_writew(16, HD64461_BBTMDR);
if (p->var.bits_per_pixel == 16) {
fb_writew(((u32 *) (p->pseudo_palette))[rect->color],
HD64461_GRSCR);
hitfb_accel_set_dest(1, rect->dx, rect->dy, rect->width,
rect->height);
hitfb_accel_start(1);
} else {
fb_writew(rect->color, HD64461_GRSCR);
hitfb_accel_set_dest(0, rect->dx, rect->dy, rect->width,
rect->height);
hitfb_accel_start(0);
}
}
}
static void hitfb_copyarea(struct fb_info *p, const struct fb_copyarea *area)
{
hitfb_accel_wait();
hitfb_accel_bitblt(p->var.bits_per_pixel == 16, area->sx, area->sy,
area->dx, area->dy, area->width, area->height,
0x00cc, 0);
}
static int hitfb_pan_display(struct fb_var_screeninfo *var,
struct fb_info *info)
{
int xoffset = var->xoffset;
int yoffset = var->yoffset;
if (xoffset != 0)
return -EINVAL;
fb_writew((yoffset*info->fix.line_length)>>10, HD64461_LCDCBAR);
return 0;
}
int hitfb_blank(int blank_mode, struct fb_info *info)
{
unsigned short v;
if (blank_mode) {
v = fb_readw(HD64461_LDR1);
v &= ~HD64461_LDR1_DON;
fb_writew(v, HD64461_LDR1);
v = fb_readw(HD64461_LCDCCR);
v |= HD64461_LCDCCR_MOFF;
fb_writew(v, HD64461_LCDCCR);
v = fb_readw(HD64461_STBCR);
v |= HD64461_STBCR_SLCDST;
fb_writew(v, HD64461_STBCR);
} else {
v = fb_readw(HD64461_STBCR);
v &= ~HD64461_STBCR_SLCDST;
fb_writew(v, HD64461_STBCR);
v = fb_readw(HD64461_LCDCCR);
v &= ~(HD64461_LCDCCR_MOFF | HD64461_LCDCCR_STREQ);
fb_writew(v, HD64461_LCDCCR);
do {
v = fb_readw(HD64461_LCDCCR);
} while(v&HD64461_LCDCCR_STBACK);
v = fb_readw(HD64461_LDR1);
v |= HD64461_LDR1_DON;
fb_writew(v, HD64461_LDR1);
}
return 0;
}
static int hitfb_setcolreg(unsigned regno, unsigned red, unsigned green,
unsigned blue, unsigned transp, struct fb_info *info)
{
if (regno >= 256)
return 1;
switch (info->var.bits_per_pixel) {
case 8:
fb_writew(regno << 8, HD64461_CPTWAR);
fb_writew(red >> 10, HD64461_CPTWDR);
fb_writew(green >> 10, HD64461_CPTWDR);
fb_writew(blue >> 10, HD64461_CPTWDR);
break;
case 16:
if (regno >= 16)
return 1;
((u32 *) (info->pseudo_palette))[regno] =
((red & 0xf800)) |
((green & 0xfc00) >> 5) | ((blue & 0xf800) >> 11);
break;
}
return 0;
}
static int hitfb_sync(struct fb_info *info)
{
hitfb_accel_wait();
return 0;
}
static int hitfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
int maxy;
var->xres = info->var.xres;
var->xres_virtual = info->var.xres;
var->yres = info->var.yres;
if ((var->bits_per_pixel != 8) && (var->bits_per_pixel != 16))
var->bits_per_pixel = info->var.bits_per_pixel;
if (var->yres_virtual < var->yres)
var->yres_virtual = var->yres;
maxy = info->fix.smem_len / var->xres;
if (var->bits_per_pixel == 16)
maxy /= 2;
if (var->yres_virtual > maxy)
var->yres_virtual = maxy;
var->xoffset = 0;
var->yoffset = 0;
switch (var->bits_per_pixel) {
case 8:
var->red.offset = 0;
var->red.length = 8;
var->green.offset = 0;
var->green.length = 8;
var->blue.offset = 0;
var->blue.length = 8;
var->transp.offset = 0;
var->transp.length = 0;
break;
case 16: /* RGB 565 */
var->red.offset = 11;
var->red.length = 5;
var->green.offset = 5;
var->green.length = 6;
var->blue.offset = 0;
var->blue.length = 5;
var->transp.offset = 0;
var->transp.length = 0;
break;
}
return 0;
}
static int hitfb_set_par(struct fb_info *info)
{
unsigned short ldr3;
switch (info->var.bits_per_pixel) {
case 8:
info->fix.line_length = info->var.xres;
info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
info->fix.ypanstep = 16;
break;
case 16:
info->fix.line_length = info->var.xres*2;
info->fix.visual = FB_VISUAL_TRUECOLOR;
info->fix.ypanstep = 8;
break;
}
fb_writew(info->fix.line_length, HD64461_LCDCLOR);
ldr3 = fb_readw(HD64461_LDR3);
ldr3 &= ~15;
ldr3 |= (info->var.bits_per_pixel == 8) ? 4 : 8;
fb_writew(ldr3, HD64461_LDR3);
return 0;
}
static struct fb_ops hitfb_ops = {
.owner = THIS_MODULE,
.fb_check_var = hitfb_check_var,
.fb_set_par = hitfb_set_par,
.fb_setcolreg = hitfb_setcolreg,
.fb_blank = hitfb_blank,
.fb_sync = hitfb_sync,
.fb_pan_display = hitfb_pan_display,
.fb_fillrect = hitfb_fillrect,
.fb_copyarea = hitfb_copyarea,
.fb_imageblit = cfb_imageblit,
};
static int hitfb_probe(struct platform_device *dev)
{
unsigned short lcdclor, ldr3, ldvndr;
struct fb_info *info;
int ret;
if (fb_get_options("hitfb", NULL))
return -ENODEV;
hitfb_fix.mmio_start = HD64461_IO_OFFSET(0x1000);
hitfb_fix.mmio_len = 0x1000;
hitfb_fix.smem_start = HD64461_IO_OFFSET(0x02000000);
hitfb_fix.smem_len = 512 * 1024;
lcdclor = fb_readw(HD64461_LCDCLOR);
ldvndr = fb_readw(HD64461_LDVNDR);
ldr3 = fb_readw(HD64461_LDR3);
switch (ldr3 & 15) {
default:
case 4:
hitfb_var.bits_per_pixel = 8;
hitfb_var.xres = lcdclor;
break;
case 8:
hitfb_var.bits_per_pixel = 16;
hitfb_var.xres = lcdclor / 2;
break;
}
hitfb_fix.line_length = lcdclor;
hitfb_fix.visual = (hitfb_var.bits_per_pixel == 8) ?
FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
hitfb_var.yres = ldvndr + 1;
hitfb_var.xres_virtual = hitfb_var.xres;
hitfb_var.yres_virtual = hitfb_fix.smem_len / lcdclor;
switch (hitfb_var.bits_per_pixel) {
case 8:
hitfb_var.red.offset = 0;
hitfb_var.red.length = 8;
hitfb_var.green.offset = 0;
hitfb_var.green.length = 8;
hitfb_var.blue.offset = 0;
hitfb_var.blue.length = 8;
hitfb_var.transp.offset = 0;
hitfb_var.transp.length = 0;
break;
case 16: /* RGB 565 */
hitfb_var.red.offset = 11;
hitfb_var.red.length = 5;
hitfb_var.green.offset = 5;
hitfb_var.green.length = 6;
hitfb_var.blue.offset = 0;
hitfb_var.blue.length = 5;
hitfb_var.transp.offset = 0;
hitfb_var.transp.length = 0;
break;
}
info = framebuffer_alloc(sizeof(u32) * 16, &dev->dev);
if (unlikely(!info))
return -ENOMEM;
info->fbops = &hitfb_ops;
info->var = hitfb_var;
info->fix = hitfb_fix;
info->pseudo_palette = info->par;
info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN |
FBINFO_HWACCEL_FILLRECT | FBINFO_HWACCEL_COPYAREA;
info->screen_base = (void *)hitfb_fix.smem_start;
ret = fb_alloc_cmap(&info->cmap, 256, 0);
if (unlikely(ret < 0))
goto err_fb;
ret = register_framebuffer(info);
if (unlikely(ret < 0))
goto err;
platform_set_drvdata(dev, info);
fb_info(info, "%s frame buffer device\n", info->fix.id);
return 0;
err:
fb_dealloc_cmap(&info->cmap);
err_fb:
framebuffer_release(info);
return ret;
}
static int hitfb_remove(struct platform_device *dev)
{
struct fb_info *info = platform_get_drvdata(dev);
unregister_framebuffer(info);
fb_dealloc_cmap(&info->cmap);
framebuffer_release(info);
return 0;
}
static int hitfb_suspend(struct device *dev)
{
u16 v;
hitfb_blank(1,0);
v = fb_readw(HD64461_STBCR);
v |= HD64461_STBCR_SLCKE_IST;
fb_writew(v, HD64461_STBCR);
return 0;
}
static int hitfb_resume(struct device *dev)
{
u16 v;
v = fb_readw(HD64461_STBCR);
v &= ~HD64461_STBCR_SLCKE_OST;
msleep(100);
v = fb_readw(HD64461_STBCR);
v &= ~HD64461_STBCR_SLCKE_IST;
fb_writew(v, HD64461_STBCR);
hitfb_blank(0,0);
return 0;
}
static const struct dev_pm_ops hitfb_dev_pm_ops = {
.suspend = hitfb_suspend,
.resume = hitfb_resume,
};
static struct platform_driver hitfb_driver = {
.probe = hitfb_probe,
.remove = hitfb_remove,
.driver = {
.name = "hitfb",
.owner = THIS_MODULE,
.pm = &hitfb_dev_pm_ops,
},
};
static struct platform_device hitfb_device = {
.name = "hitfb",
.id = -1,
};
static int __init hitfb_init(void)
{
int ret;
ret = platform_driver_register(&hitfb_driver);
if (!ret) {
ret = platform_device_register(&hitfb_device);
if (ret)
platform_driver_unregister(&hitfb_driver);
}
return ret;
}
static void __exit hitfb_exit(void)
{
platform_device_unregister(&hitfb_device);
platform_driver_unregister(&hitfb_driver);
}
module_init(hitfb_init);
module_exit(hitfb_exit);
MODULE_LICENSE("GPL");