96 lines
2 KiB
C
96 lines
2 KiB
C
|
/*
|
||
|
|
* linux/drivers/video/bt455.h
|
||
|
|
*
|
||
|
|
* Copyright 2003 Thiemo Seufer <seufer@csv.ica.uni-stuttgart.de>
|
||
|
|
*
|
||
|
|
* 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/types.h>
|
||
|
|
#include <asm/system.h>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Bt455 byte-wide registers, 32-bit aligned.
|
||
|
|
*/
|
||
|
|
struct bt455_regs {
|
||
|
|
volatile u8 addr_cmap;
|
||
|
|
u8 pad0[3];
|
||
|
|
volatile u8 addr_cmap_data;
|
||
|
|
u8 pad1[3];
|
||
|
|
volatile u8 addr_clr;
|
||
|
|
u8 pad2[3];
|
||
|
|
volatile u8 addr_ovly;
|
||
|
|
u8 pad3[3];
|
||
|
|
};
|
||
|
|
|
||
|
|
static inline void bt455_select_reg(struct bt455_regs *regs, int ir)
|
||
|
|
{
|
||
|
|
mb();
|
||
|
|
regs->addr_cmap = ir & 0x0f;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Read/write to a Bt455 color map register.
|
||
|
|
*/
|
||
|
|
static inline void bt455_read_cmap_entry(struct bt455_regs *regs, int cr,
|
||
|
|
u8* red, u8* green, u8* blue)
|
||
|
|
{
|
||
|
|
bt455_select_reg(regs, cr);
|
||
|
|
mb();
|
||
|
|
*red = regs->addr_cmap_data & 0x0f;
|
||
|
|
rmb();
|
||
|
|
*green = regs->addr_cmap_data & 0x0f;
|
||
|
|
rmb();
|
||
|
|
*blue = regs->addr_cmap_data & 0x0f;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void bt455_write_cmap_entry(struct bt455_regs *regs, int cr,
|
||
|
|
u8 red, u8 green, u8 blue)
|
||
|
|
{
|
||
|
|
bt455_select_reg(regs, cr);
|
||
|
|
wmb();
|
||
|
|
regs->addr_cmap_data = red & 0x0f;
|
||
|
|
wmb();
|
||
|
|
regs->addr_cmap_data = green & 0x0f;
|
||
|
|
wmb();
|
||
|
|
regs->addr_cmap_data = blue & 0x0f;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void bt455_write_ovly_entry(struct bt455_regs *regs, int cr,
|
||
|
|
u8 red, u8 green, u8 blue)
|
||
|
|
{
|
||
|
|
bt455_select_reg(regs, cr);
|
||
|
|
wmb();
|
||
|
|
regs->addr_ovly = red & 0x0f;
|
||
|
|
wmb();
|
||
|
|
regs->addr_ovly = green & 0x0f;
|
||
|
|
wmb();
|
||
|
|
regs->addr_ovly = blue & 0x0f;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void bt455_set_cursor(struct bt455_regs *regs)
|
||
|
|
{
|
||
|
|
mb();
|
||
|
|
regs->addr_ovly = 0x0f;
|
||
|
|
wmb();
|
||
|
|
regs->addr_ovly = 0x0f;
|
||
|
|
wmb();
|
||
|
|
regs->addr_ovly = 0x0f;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void bt455_erase_cursor(struct bt455_regs *regs)
|
||
|
|
{
|
||
|
|
/* bt455_write_cmap_entry(regs, 8, 0x00, 0x00, 0x00); */
|
||
|
|
/* bt455_write_cmap_entry(regs, 9, 0x00, 0x00, 0x00); */
|
||
|
|
bt455_write_ovly_entry(regs, 8, 0x03, 0x03, 0x03);
|
||
|
|
bt455_write_ovly_entry(regs, 9, 0x07, 0x07, 0x07);
|
||
|
|
|
||
|
|
wmb();
|
||
|
|
regs->addr_ovly = 0x09;
|
||
|
|
wmb();
|
||
|
|
regs->addr_ovly = 0x09;
|
||
|
|
wmb();
|
||
|
|
regs->addr_ovly = 0x09;
|
||
|
|
}
|