227 lines
6 KiB
C
227 lines
6 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* ATI Mach64 CT/VT/GT/LT Cursor Support
|
|
*/
|
|
|
|
#include <linux/fb.h>
|
|
#include <linux/init.h>
|
|
#include <linux/string.h>
|
|
#include "../core/fb_draw.h"
|
|
|
|
#include <asm/io.h>
|
|
|
|
#ifdef __sparc__
|
|
#include <asm/fbio.h>
|
|
#endif
|
|
|
|
#include <video/mach64.h>
|
|
#include "atyfb.h"
|
|
|
|
/*
|
|
* The hardware cursor definition requires 2 bits per pixel. The
|
|
* Cursor size reguardless of the visible cursor size is 64 pixels
|
|
* by 64 lines. The total memory required to define the cursor is
|
|
* 16 bytes / line for 64 lines or 1024 bytes of data. The data
|
|
* must be in a contigiuos format. The 2 bit cursor code values are
|
|
* as follows:
|
|
*
|
|
* 00 - pixel colour = CURSOR_CLR_0
|
|
* 01 - pixel colour = CURSOR_CLR_1
|
|
* 10 - pixel colour = transparent (current display pixel)
|
|
* 11 - pixel colour = 1's complement of current display pixel
|
|
*
|
|
* Cursor Offset 64 pixels Actual Displayed Area
|
|
* \_________________________/
|
|
* | | | |
|
|
* |<--------------->| | |
|
|
* | CURS_HORZ_OFFSET| | |
|
|
* | |_______| | 64 Lines
|
|
* | ^ | |
|
|
* | | | |
|
|
* | CURS_VERT_OFFSET| |
|
|
* | | | |
|
|
* |____________________|____| |
|
|
*
|
|
*
|
|
* The Screen position of the top left corner of the displayed
|
|
* cursor is specificed by CURS_HORZ_VERT_POSN. Care must be taken
|
|
* when the cursor hot spot is not the top left corner and the
|
|
* physical cursor position becomes negative. It will be be displayed
|
|
* if either the horizontal or vertical cursor position is negative
|
|
*
|
|
* If x becomes negative the cursor manager must adjust the CURS_HORZ_OFFSET
|
|
* to a larger number and saturate CUR_HORZ_POSN to zero.
|
|
*
|
|
* if Y becomes negative, CUR_VERT_OFFSET must be adjusted to a larger number,
|
|
* CUR_OFFSET must be adjusted to a point to the appropriate line in the cursor
|
|
* definitation and CUR_VERT_POSN must be saturated to zero.
|
|
*/
|
|
|
|
/*
|
|
* Hardware Cursor support.
|
|
*/
|
|
static const u8 cursor_bits_lookup[16] = {
|
|
0x00, 0x40, 0x10, 0x50, 0x04, 0x44, 0x14, 0x54,
|
|
0x01, 0x41, 0x11, 0x51, 0x05, 0x45, 0x15, 0x55
|
|
};
|
|
|
|
static int atyfb_cursor(struct fb_info *info, struct fb_cursor *cursor)
|
|
{
|
|
struct atyfb_par *par = (struct atyfb_par *) info->par;
|
|
u16 xoff, yoff;
|
|
int x, y, h;
|
|
|
|
#ifdef __sparc__
|
|
if (par->mmaped)
|
|
return -EPERM;
|
|
#endif
|
|
if (par->asleep)
|
|
return -EPERM;
|
|
|
|
wait_for_fifo(1, par);
|
|
if (cursor->enable)
|
|
aty_st_le32(GEN_TEST_CNTL, aty_ld_le32(GEN_TEST_CNTL, par)
|
|
| HWCURSOR_ENABLE, par);
|
|
else
|
|
aty_st_le32(GEN_TEST_CNTL, aty_ld_le32(GEN_TEST_CNTL, par)
|
|
& ~HWCURSOR_ENABLE, par);
|
|
|
|
/* set position */
|
|
if (cursor->set & FB_CUR_SETPOS) {
|
|
x = cursor->image.dx - cursor->hot.x - info->var.xoffset;
|
|
if (x < 0) {
|
|
xoff = -x;
|
|
x = 0;
|
|
} else {
|
|
xoff = 0;
|
|
}
|
|
|
|
y = cursor->image.dy - cursor->hot.y - info->var.yoffset;
|
|
if (y < 0) {
|
|
yoff = -y;
|
|
y = 0;
|
|
} else {
|
|
yoff = 0;
|
|
}
|
|
|
|
h = cursor->image.height;
|
|
|
|
/*
|
|
* In doublescan mode, the cursor location
|
|
* and heigh also needs to be doubled.
|
|
*/
|
|
if (par->crtc.gen_cntl & CRTC_DBL_SCAN_EN) {
|
|
y<<=1;
|
|
h<<=1;
|
|
}
|
|
wait_for_fifo(3, par);
|
|
aty_st_le32(CUR_OFFSET, (info->fix.smem_len >> 3) + (yoff << 1), par);
|
|
aty_st_le32(CUR_HORZ_VERT_OFF,
|
|
((u32) (64 - h + yoff) << 16) | xoff, par);
|
|
aty_st_le32(CUR_HORZ_VERT_POSN, ((u32) y << 16) | x, par);
|
|
}
|
|
|
|
/* Set color map */
|
|
if (cursor->set & FB_CUR_SETCMAP) {
|
|
u32 fg_idx, bg_idx, fg, bg;
|
|
|
|
fg_idx = cursor->image.fg_color;
|
|
bg_idx = cursor->image.bg_color;
|
|
|
|
fg = ((info->cmap.red[fg_idx] & 0xff) << 24) |
|
|
((info->cmap.green[fg_idx] & 0xff) << 16) |
|
|
((info->cmap.blue[fg_idx] & 0xff) << 8) | 0xff;
|
|
|
|
bg = ((info->cmap.red[bg_idx] & 0xff) << 24) |
|
|
((info->cmap.green[bg_idx] & 0xff) << 16) |
|
|
((info->cmap.blue[bg_idx] & 0xff) << 8);
|
|
|
|
wait_for_fifo(2, par);
|
|
aty_st_le32(CUR_CLR0, bg, par);
|
|
aty_st_le32(CUR_CLR1, fg, par);
|
|
}
|
|
|
|
if (cursor->set & (FB_CUR_SETSHAPE | FB_CUR_SETIMAGE)) {
|
|
u8 *src = (u8 *)cursor->image.data;
|
|
u8 *msk = (u8 *)cursor->mask;
|
|
u8 __iomem *dst = (u8 __iomem *)info->sprite.addr;
|
|
unsigned int width = (cursor->image.width + 7) >> 3;
|
|
unsigned int height = cursor->image.height;
|
|
unsigned int align = info->sprite.scan_align;
|
|
|
|
unsigned int i, j, offset;
|
|
u8 m, b;
|
|
|
|
// Clear cursor image with 1010101010...
|
|
fb_memset(dst, 0xaa, 1024);
|
|
|
|
offset = align - width*2;
|
|
|
|
for (i = 0; i < height; i++) {
|
|
for (j = 0; j < width; j++) {
|
|
u16 l = 0xaaaa;
|
|
b = *src++;
|
|
m = *msk++;
|
|
switch (cursor->rop) {
|
|
case ROP_XOR:
|
|
// Upper 4 bits of mask data
|
|
l = cursor_bits_lookup[(b ^ m) >> 4] |
|
|
// Lower 4 bits of mask
|
|
(cursor_bits_lookup[(b ^ m) & 0x0f] << 8);
|
|
break;
|
|
case ROP_COPY:
|
|
// Upper 4 bits of mask data
|
|
l = cursor_bits_lookup[(b & m) >> 4] |
|
|
// Lower 4 bits of mask
|
|
(cursor_bits_lookup[(b & m) & 0x0f] << 8);
|
|
break;
|
|
}
|
|
/*
|
|
* If cursor size is not a multiple of 8 characters
|
|
* we must pad it with transparent pattern (0xaaaa).
|
|
*/
|
|
if ((j + 1) * 8 > cursor->image.width) {
|
|
l = comp(l, 0xaaaa,
|
|
(1 << ((cursor->image.width & 7) * 2)) - 1);
|
|
}
|
|
fb_writeb(l & 0xff, dst++);
|
|
fb_writeb(l >> 8, dst++);
|
|
}
|
|
dst += offset;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int aty_init_cursor(struct fb_info *info)
|
|
{
|
|
unsigned long addr;
|
|
|
|
info->fix.smem_len -= PAGE_SIZE;
|
|
|
|
#ifdef __sparc__
|
|
addr = (unsigned long) info->screen_base - 0x800000 + info->fix.smem_len;
|
|
info->sprite.addr = (u8 *) addr;
|
|
#else
|
|
#ifdef __BIG_ENDIAN
|
|
addr = info->fix.smem_start - 0x800000 + info->fix.smem_len;
|
|
info->sprite.addr = (u8 *) ioremap(addr, 1024);
|
|
#else
|
|
addr = (unsigned long) info->screen_base + info->fix.smem_len;
|
|
info->sprite.addr = (u8 *) addr;
|
|
#endif
|
|
#endif
|
|
if (!info->sprite.addr)
|
|
return -ENXIO;
|
|
info->sprite.size = PAGE_SIZE;
|
|
info->sprite.scan_align = 16; /* Scratch pad 64 bytes wide */
|
|
info->sprite.buf_align = 16; /* and 64 lines tall. */
|
|
info->sprite.flags = FB_PIXMAP_IO;
|
|
|
|
info->fbops->fb_cursor = atyfb_cursor;
|
|
|
|
return 0;
|
|
}
|
|
|