548 lines
14 KiB
C
548 lines
14 KiB
C
/*
|
|
* Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
|
|
* Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
|
|
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public
|
|
* License as published by the Free Software Foundation;
|
|
* either version 2, or (at your option) any later version.
|
|
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTIES OR REPRESENTATIONS; without even
|
|
* the implied warranty of MERCHANTABILITY or FITNESS FOR
|
|
* A PARTICULAR PURPOSE.See the GNU General Public License
|
|
* for more details.
|
|
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc.,
|
|
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*/
|
|
#include <linux/via-core.h>
|
|
#include "global.h"
|
|
|
|
/*
|
|
* Figure out an appropriate bytes-per-pixel setting.
|
|
*/
|
|
static int viafb_set_bpp(void __iomem *engine, u8 bpp)
|
|
{
|
|
u32 gemode;
|
|
|
|
/* Preserve the reserved bits */
|
|
/* Lowest 2 bits to zero gives us no rotation */
|
|
gemode = readl(engine + VIA_REG_GEMODE) & 0xfffffcfc;
|
|
switch (bpp) {
|
|
case 8:
|
|
gemode |= VIA_GEM_8bpp;
|
|
break;
|
|
case 16:
|
|
gemode |= VIA_GEM_16bpp;
|
|
break;
|
|
case 32:
|
|
gemode |= VIA_GEM_32bpp;
|
|
break;
|
|
default:
|
|
printk(KERN_WARNING "viafb_set_bpp: Unsupported bpp %d\n", bpp);
|
|
return -EINVAL;
|
|
}
|
|
writel(gemode, engine + VIA_REG_GEMODE);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int hw_bitblt_1(void __iomem *engine, u8 op, u32 width, u32 height,
|
|
u8 dst_bpp, u32 dst_addr, u32 dst_pitch, u32 dst_x, u32 dst_y,
|
|
u32 *src_mem, u32 src_addr, u32 src_pitch, u32 src_x, u32 src_y,
|
|
u32 fg_color, u32 bg_color, u8 fill_rop)
|
|
{
|
|
u32 ge_cmd = 0, tmp, i;
|
|
int ret;
|
|
|
|
if (!op || op > 3) {
|
|
printk(KERN_WARNING "hw_bitblt_1: Invalid operation: %d\n", op);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (op != VIA_BITBLT_FILL && !src_mem && src_addr == dst_addr) {
|
|
if (src_x < dst_x) {
|
|
ge_cmd |= 0x00008000;
|
|
src_x += width - 1;
|
|
dst_x += width - 1;
|
|
}
|
|
if (src_y < dst_y) {
|
|
ge_cmd |= 0x00004000;
|
|
src_y += height - 1;
|
|
dst_y += height - 1;
|
|
}
|
|
}
|
|
|
|
if (op == VIA_BITBLT_FILL) {
|
|
switch (fill_rop) {
|
|
case 0x00: /* blackness */
|
|
case 0x5A: /* pattern inversion */
|
|
case 0xF0: /* pattern copy */
|
|
case 0xFF: /* whiteness */
|
|
break;
|
|
default:
|
|
printk(KERN_WARNING "hw_bitblt_1: Invalid fill rop: "
|
|
"%u\n", fill_rop);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
ret = viafb_set_bpp(engine, dst_bpp);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (op != VIA_BITBLT_FILL) {
|
|
if (src_x & (op == VIA_BITBLT_MONO ? 0xFFFF8000 : 0xFFFFF000)
|
|
|| src_y & 0xFFFFF000) {
|
|
printk(KERN_WARNING "hw_bitblt_1: Unsupported source "
|
|
"x/y %d %d\n", src_x, src_y);
|
|
return -EINVAL;
|
|
}
|
|
tmp = src_x | (src_y << 16);
|
|
writel(tmp, engine + 0x08);
|
|
}
|
|
|
|
if (dst_x & 0xFFFFF000 || dst_y & 0xFFFFF000) {
|
|
printk(KERN_WARNING "hw_bitblt_1: Unsupported destination x/y "
|
|
"%d %d\n", dst_x, dst_y);
|
|
return -EINVAL;
|
|
}
|
|
tmp = dst_x | (dst_y << 16);
|
|
writel(tmp, engine + 0x0C);
|
|
|
|
if ((width - 1) & 0xFFFFF000 || (height - 1) & 0xFFFFF000) {
|
|
printk(KERN_WARNING "hw_bitblt_1: Unsupported width/height "
|
|
"%d %d\n", width, height);
|
|
return -EINVAL;
|
|
}
|
|
tmp = (width - 1) | ((height - 1) << 16);
|
|
writel(tmp, engine + 0x10);
|
|
|
|
if (op != VIA_BITBLT_COLOR)
|
|
writel(fg_color, engine + 0x18);
|
|
|
|
if (op == VIA_BITBLT_MONO)
|
|
writel(bg_color, engine + 0x1C);
|
|
|
|
if (op != VIA_BITBLT_FILL) {
|
|
tmp = src_mem ? 0 : src_addr;
|
|
if (dst_addr & 0xE0000007) {
|
|
printk(KERN_WARNING "hw_bitblt_1: Unsupported source "
|
|
"address %X\n", tmp);
|
|
return -EINVAL;
|
|
}
|
|
tmp >>= 3;
|
|
writel(tmp, engine + 0x30);
|
|
}
|
|
|
|
if (dst_addr & 0xE0000007) {
|
|
printk(KERN_WARNING "hw_bitblt_1: Unsupported destination "
|
|
"address %X\n", dst_addr);
|
|
return -EINVAL;
|
|
}
|
|
tmp = dst_addr >> 3;
|
|
writel(tmp, engine + 0x34);
|
|
|
|
if (op == VIA_BITBLT_FILL)
|
|
tmp = 0;
|
|
else
|
|
tmp = src_pitch;
|
|
if (tmp & 0xFFFFC007 || dst_pitch & 0xFFFFC007) {
|
|
printk(KERN_WARNING "hw_bitblt_1: Unsupported pitch %X %X\n",
|
|
tmp, dst_pitch);
|
|
return -EINVAL;
|
|
}
|
|
tmp = VIA_PITCH_ENABLE | (tmp >> 3) | (dst_pitch << (16 - 3));
|
|
writel(tmp, engine + 0x38);
|
|
|
|
if (op == VIA_BITBLT_FILL)
|
|
ge_cmd |= fill_rop << 24 | 0x00002000 | 0x00000001;
|
|
else {
|
|
ge_cmd |= 0xCC000000; /* ROP=SRCCOPY */
|
|
if (src_mem)
|
|
ge_cmd |= 0x00000040;
|
|
if (op == VIA_BITBLT_MONO)
|
|
ge_cmd |= 0x00000002 | 0x00000100 | 0x00020000;
|
|
else
|
|
ge_cmd |= 0x00000001;
|
|
}
|
|
writel(ge_cmd, engine);
|
|
|
|
if (op == VIA_BITBLT_FILL || !src_mem)
|
|
return 0;
|
|
|
|
tmp = (width * height * (op == VIA_BITBLT_MONO ? 1 : (dst_bpp >> 3)) +
|
|
3) >> 2;
|
|
|
|
for (i = 0; i < tmp; i++)
|
|
writel(src_mem[i], engine + VIA_MMIO_BLTBASE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hw_bitblt_2(void __iomem *engine, u8 op, u32 width, u32 height,
|
|
u8 dst_bpp, u32 dst_addr, u32 dst_pitch, u32 dst_x, u32 dst_y,
|
|
u32 *src_mem, u32 src_addr, u32 src_pitch, u32 src_x, u32 src_y,
|
|
u32 fg_color, u32 bg_color, u8 fill_rop)
|
|
{
|
|
u32 ge_cmd = 0, tmp, i;
|
|
int ret;
|
|
|
|
if (!op || op > 3) {
|
|
printk(KERN_WARNING "hw_bitblt_2: Invalid operation: %d\n", op);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (op != VIA_BITBLT_FILL && !src_mem && src_addr == dst_addr) {
|
|
if (src_x < dst_x) {
|
|
ge_cmd |= 0x00008000;
|
|
src_x += width - 1;
|
|
dst_x += width - 1;
|
|
}
|
|
if (src_y < dst_y) {
|
|
ge_cmd |= 0x00004000;
|
|
src_y += height - 1;
|
|
dst_y += height - 1;
|
|
}
|
|
}
|
|
|
|
if (op == VIA_BITBLT_FILL) {
|
|
switch (fill_rop) {
|
|
case 0x00: /* blackness */
|
|
case 0x5A: /* pattern inversion */
|
|
case 0xF0: /* pattern copy */
|
|
case 0xFF: /* whiteness */
|
|
break;
|
|
default:
|
|
printk(KERN_WARNING "hw_bitblt_2: Invalid fill rop: "
|
|
"%u\n", fill_rop);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
ret = viafb_set_bpp(engine, dst_bpp);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (op == VIA_BITBLT_FILL)
|
|
tmp = 0;
|
|
else
|
|
tmp = src_pitch;
|
|
if (tmp & 0xFFFFC007 || dst_pitch & 0xFFFFC007) {
|
|
printk(KERN_WARNING "hw_bitblt_2: Unsupported pitch %X %X\n",
|
|
tmp, dst_pitch);
|
|
return -EINVAL;
|
|
}
|
|
tmp = (tmp >> 3) | (dst_pitch << (16 - 3));
|
|
writel(tmp, engine + 0x08);
|
|
|
|
if ((width - 1) & 0xFFFFF000 || (height - 1) & 0xFFFFF000) {
|
|
printk(KERN_WARNING "hw_bitblt_2: Unsupported width/height "
|
|
"%d %d\n", width, height);
|
|
return -EINVAL;
|
|
}
|
|
tmp = (width - 1) | ((height - 1) << 16);
|
|
writel(tmp, engine + 0x0C);
|
|
|
|
if (dst_x & 0xFFFFF000 || dst_y & 0xFFFFF000) {
|
|
printk(KERN_WARNING "hw_bitblt_2: Unsupported destination x/y "
|
|
"%d %d\n", dst_x, dst_y);
|
|
return -EINVAL;
|
|
}
|
|
tmp = dst_x | (dst_y << 16);
|
|
writel(tmp, engine + 0x10);
|
|
|
|
if (dst_addr & 0xE0000007) {
|
|
printk(KERN_WARNING "hw_bitblt_2: Unsupported destination "
|
|
"address %X\n", dst_addr);
|
|
return -EINVAL;
|
|
}
|
|
tmp = dst_addr >> 3;
|
|
writel(tmp, engine + 0x14);
|
|
|
|
if (op != VIA_BITBLT_FILL) {
|
|
if (src_x & (op == VIA_BITBLT_MONO ? 0xFFFF8000 : 0xFFFFF000)
|
|
|| src_y & 0xFFFFF000) {
|
|
printk(KERN_WARNING "hw_bitblt_2: Unsupported source "
|
|
"x/y %d %d\n", src_x, src_y);
|
|
return -EINVAL;
|
|
}
|
|
tmp = src_x | (src_y << 16);
|
|
writel(tmp, engine + 0x18);
|
|
|
|
tmp = src_mem ? 0 : src_addr;
|
|
if (dst_addr & 0xE0000007) {
|
|
printk(KERN_WARNING "hw_bitblt_2: Unsupported source "
|
|
"address %X\n", tmp);
|
|
return -EINVAL;
|
|
}
|
|
tmp >>= 3;
|
|
writel(tmp, engine + 0x1C);
|
|
}
|
|
|
|
if (op == VIA_BITBLT_FILL) {
|
|
writel(fg_color, engine + 0x58);
|
|
} else if (op == VIA_BITBLT_MONO) {
|
|
writel(fg_color, engine + 0x4C);
|
|
writel(bg_color, engine + 0x50);
|
|
}
|
|
|
|
if (op == VIA_BITBLT_FILL)
|
|
ge_cmd |= fill_rop << 24 | 0x00002000 | 0x00000001;
|
|
else {
|
|
ge_cmd |= 0xCC000000; /* ROP=SRCCOPY */
|
|
if (src_mem)
|
|
ge_cmd |= 0x00000040;
|
|
if (op == VIA_BITBLT_MONO)
|
|
ge_cmd |= 0x00000002 | 0x00000100 | 0x00020000;
|
|
else
|
|
ge_cmd |= 0x00000001;
|
|
}
|
|
writel(ge_cmd, engine);
|
|
|
|
if (op == VIA_BITBLT_FILL || !src_mem)
|
|
return 0;
|
|
|
|
tmp = (width * height * (op == VIA_BITBLT_MONO ? 1 : (dst_bpp >> 3)) +
|
|
3) >> 2;
|
|
|
|
for (i = 0; i < tmp; i++)
|
|
writel(src_mem[i], engine + VIA_MMIO_BLTBASE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int viafb_setup_engine(struct fb_info *info)
|
|
{
|
|
struct viafb_par *viapar = info->par;
|
|
void __iomem *engine;
|
|
u32 chip_name = viapar->shared->chip_info.gfx_chip_name;
|
|
|
|
engine = viapar->shared->vdev->engine_mmio;
|
|
if (!engine) {
|
|
printk(KERN_WARNING "viafb_init_accel: ioremap failed, "
|
|
"hardware acceleration disabled\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
switch (chip_name) {
|
|
case UNICHROME_CLE266:
|
|
case UNICHROME_K400:
|
|
case UNICHROME_K800:
|
|
case UNICHROME_PM800:
|
|
case UNICHROME_CN700:
|
|
case UNICHROME_CX700:
|
|
case UNICHROME_CN750:
|
|
case UNICHROME_K8M890:
|
|
case UNICHROME_P4M890:
|
|
case UNICHROME_P4M900:
|
|
viapar->shared->hw_bitblt = hw_bitblt_1;
|
|
break;
|
|
case UNICHROME_VX800:
|
|
case UNICHROME_VX855:
|
|
case UNICHROME_VX900:
|
|
viapar->shared->hw_bitblt = hw_bitblt_2;
|
|
break;
|
|
default:
|
|
viapar->shared->hw_bitblt = NULL;
|
|
}
|
|
|
|
viapar->fbmem_free -= CURSOR_SIZE;
|
|
viapar->shared->cursor_vram_addr = viapar->fbmem_free;
|
|
viapar->fbmem_used += CURSOR_SIZE;
|
|
|
|
viapar->fbmem_free -= VQ_SIZE;
|
|
viapar->shared->vq_vram_addr = viapar->fbmem_free;
|
|
viapar->fbmem_used += VQ_SIZE;
|
|
|
|
#if defined(CONFIG_VIDEO_VIA_CAMERA) || defined(CONFIG_VIDEO_VIA_CAMERA_MODULE)
|
|
/*
|
|
* Set aside a chunk of framebuffer memory for the camera
|
|
* driver. Someday this driver probably needs a proper allocator
|
|
* for fbmem; for now, we just have to do this before the
|
|
* framebuffer initializes itself.
|
|
*
|
|
* As for the size: the engine can handle three frames,
|
|
* 16 bits deep, up to VGA resolution.
|
|
*/
|
|
viapar->shared->vdev->camera_fbmem_size = 3*VGA_HEIGHT*VGA_WIDTH*2;
|
|
viapar->fbmem_free -= viapar->shared->vdev->camera_fbmem_size;
|
|
viapar->fbmem_used += viapar->shared->vdev->camera_fbmem_size;
|
|
viapar->shared->vdev->camera_fbmem_offset = viapar->fbmem_free;
|
|
#endif
|
|
|
|
viafb_reset_engine(viapar);
|
|
return 0;
|
|
}
|
|
|
|
void viafb_reset_engine(struct viafb_par *viapar)
|
|
{
|
|
void __iomem *engine = viapar->shared->vdev->engine_mmio;
|
|
int highest_reg, i;
|
|
u32 vq_start_addr, vq_end_addr, vq_start_low, vq_end_low, vq_high,
|
|
vq_len, chip_name = viapar->shared->chip_info.gfx_chip_name;
|
|
|
|
/* Initialize registers to reset the 2D engine */
|
|
switch (viapar->shared->chip_info.twod_engine) {
|
|
case VIA_2D_ENG_M1:
|
|
highest_reg = 0x5c;
|
|
break;
|
|
default:
|
|
highest_reg = 0x40;
|
|
break;
|
|
}
|
|
for (i = 0; i <= highest_reg; i += 4)
|
|
writel(0x0, engine + i);
|
|
|
|
/* Init AGP and VQ regs */
|
|
switch (chip_name) {
|
|
case UNICHROME_K8M890:
|
|
case UNICHROME_P4M900:
|
|
case UNICHROME_VX800:
|
|
case UNICHROME_VX855:
|
|
case UNICHROME_VX900:
|
|
writel(0x00100000, engine + VIA_REG_CR_TRANSET);
|
|
writel(0x680A0000, engine + VIA_REG_CR_TRANSPACE);
|
|
writel(0x02000000, engine + VIA_REG_CR_TRANSPACE);
|
|
break;
|
|
|
|
default:
|
|
writel(0x00100000, engine + VIA_REG_TRANSET);
|
|
writel(0x00000000, engine + VIA_REG_TRANSPACE);
|
|
writel(0x00333004, engine + VIA_REG_TRANSPACE);
|
|
writel(0x60000000, engine + VIA_REG_TRANSPACE);
|
|
writel(0x61000000, engine + VIA_REG_TRANSPACE);
|
|
writel(0x62000000, engine + VIA_REG_TRANSPACE);
|
|
writel(0x63000000, engine + VIA_REG_TRANSPACE);
|
|
writel(0x64000000, engine + VIA_REG_TRANSPACE);
|
|
writel(0x7D000000, engine + VIA_REG_TRANSPACE);
|
|
|
|
writel(0xFE020000, engine + VIA_REG_TRANSET);
|
|
writel(0x00000000, engine + VIA_REG_TRANSPACE);
|
|
break;
|
|
}
|
|
|
|
/* Enable VQ */
|
|
vq_start_addr = viapar->shared->vq_vram_addr;
|
|
vq_end_addr = viapar->shared->vq_vram_addr + VQ_SIZE - 1;
|
|
|
|
vq_start_low = 0x50000000 | (vq_start_addr & 0xFFFFFF);
|
|
vq_end_low = 0x51000000 | (vq_end_addr & 0xFFFFFF);
|
|
vq_high = 0x52000000 | ((vq_start_addr & 0xFF000000) >> 24) |
|
|
((vq_end_addr & 0xFF000000) >> 16);
|
|
vq_len = 0x53000000 | (VQ_SIZE >> 3);
|
|
|
|
switch (chip_name) {
|
|
case UNICHROME_K8M890:
|
|
case UNICHROME_P4M900:
|
|
case UNICHROME_VX800:
|
|
case UNICHROME_VX855:
|
|
case UNICHROME_VX900:
|
|
vq_start_low |= 0x20000000;
|
|
vq_end_low |= 0x20000000;
|
|
vq_high |= 0x20000000;
|
|
vq_len |= 0x20000000;
|
|
|
|
writel(0x00100000, engine + VIA_REG_CR_TRANSET);
|
|
writel(vq_high, engine + VIA_REG_CR_TRANSPACE);
|
|
writel(vq_start_low, engine + VIA_REG_CR_TRANSPACE);
|
|
writel(vq_end_low, engine + VIA_REG_CR_TRANSPACE);
|
|
writel(vq_len, engine + VIA_REG_CR_TRANSPACE);
|
|
writel(0x74301001, engine + VIA_REG_CR_TRANSPACE);
|
|
writel(0x00000000, engine + VIA_REG_CR_TRANSPACE);
|
|
break;
|
|
default:
|
|
writel(0x00FE0000, engine + VIA_REG_TRANSET);
|
|
writel(0x080003FE, engine + VIA_REG_TRANSPACE);
|
|
writel(0x0A00027C, engine + VIA_REG_TRANSPACE);
|
|
writel(0x0B000260, engine + VIA_REG_TRANSPACE);
|
|
writel(0x0C000274, engine + VIA_REG_TRANSPACE);
|
|
writel(0x0D000264, engine + VIA_REG_TRANSPACE);
|
|
writel(0x0E000000, engine + VIA_REG_TRANSPACE);
|
|
writel(0x0F000020, engine + VIA_REG_TRANSPACE);
|
|
writel(0x1000027E, engine + VIA_REG_TRANSPACE);
|
|
writel(0x110002FE, engine + VIA_REG_TRANSPACE);
|
|
writel(0x200F0060, engine + VIA_REG_TRANSPACE);
|
|
|
|
writel(0x00000006, engine + VIA_REG_TRANSPACE);
|
|
writel(0x40008C0F, engine + VIA_REG_TRANSPACE);
|
|
writel(0x44000000, engine + VIA_REG_TRANSPACE);
|
|
writel(0x45080C04, engine + VIA_REG_TRANSPACE);
|
|
writel(0x46800408, engine + VIA_REG_TRANSPACE);
|
|
|
|
writel(vq_high, engine + VIA_REG_TRANSPACE);
|
|
writel(vq_start_low, engine + VIA_REG_TRANSPACE);
|
|
writel(vq_end_low, engine + VIA_REG_TRANSPACE);
|
|
writel(vq_len, engine + VIA_REG_TRANSPACE);
|
|
break;
|
|
}
|
|
|
|
/* Set Cursor Image Base Address */
|
|
writel(viapar->shared->cursor_vram_addr, engine + VIA_REG_CURSOR_MODE);
|
|
writel(0x0, engine + VIA_REG_CURSOR_POS);
|
|
writel(0x0, engine + VIA_REG_CURSOR_ORG);
|
|
writel(0x0, engine + VIA_REG_CURSOR_BG);
|
|
writel(0x0, engine + VIA_REG_CURSOR_FG);
|
|
return;
|
|
}
|
|
|
|
void viafb_show_hw_cursor(struct fb_info *info, int Status)
|
|
{
|
|
struct viafb_par *viapar = info->par;
|
|
u32 temp, iga_path = viapar->iga_path;
|
|
|
|
temp = readl(viapar->shared->vdev->engine_mmio + VIA_REG_CURSOR_MODE);
|
|
switch (Status) {
|
|
case HW_Cursor_ON:
|
|
temp |= 0x1;
|
|
break;
|
|
case HW_Cursor_OFF:
|
|
temp &= 0xFFFFFFFE;
|
|
break;
|
|
}
|
|
switch (iga_path) {
|
|
case IGA2:
|
|
temp |= 0x80000000;
|
|
break;
|
|
case IGA1:
|
|
default:
|
|
temp &= 0x7FFFFFFF;
|
|
}
|
|
writel(temp, viapar->shared->vdev->engine_mmio + VIA_REG_CURSOR_MODE);
|
|
}
|
|
|
|
void viafb_wait_engine_idle(struct fb_info *info)
|
|
{
|
|
struct viafb_par *viapar = info->par;
|
|
int loop = 0;
|
|
u32 mask;
|
|
void __iomem *engine = viapar->shared->vdev->engine_mmio;
|
|
|
|
switch (viapar->shared->chip_info.twod_engine) {
|
|
case VIA_2D_ENG_H5:
|
|
case VIA_2D_ENG_M1:
|
|
mask = VIA_CMD_RGTR_BUSY_M1 | VIA_2D_ENG_BUSY_M1 |
|
|
VIA_3D_ENG_BUSY_M1;
|
|
break;
|
|
default:
|
|
while (!(readl(engine + VIA_REG_STATUS) &
|
|
VIA_VR_QUEUE_BUSY) && (loop < MAXLOOP)) {
|
|
loop++;
|
|
cpu_relax();
|
|
}
|
|
mask = VIA_CMD_RGTR_BUSY | VIA_2D_ENG_BUSY | VIA_3D_ENG_BUSY;
|
|
break;
|
|
}
|
|
|
|
while ((readl(engine + VIA_REG_STATUS) & mask) && (loop < MAXLOOP)) {
|
|
loop++;
|
|
cpu_relax();
|
|
}
|
|
|
|
if (loop >= MAXLOOP)
|
|
printk(KERN_ERR "viafb_wait_engine_idle: not syncing\n");
|
|
}
|