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linux/drivers/video/s3fb.c
Krzysztof Helt c3ca34f90b s3fb: do not allow incorrect pixclock settings 
This patch adds check if selected pixclock is valid (is in the PLL range).

Previously, if the pixclock could not be set, the new mode resolution was set
but pixclock was not set which led to incorrect timings sent to monitor.

[adaplas]
Fixed a few misplaced curly braces.

Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Antonino Daplas <adaplas@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16 09:43:23 -07:00

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/*
* linux/drivers/video/s3fb.c -- Frame buffer device driver for S3 Trio/Virge
*
* Copyright (c) 2006-2007 Ondrej Zajicek <santiago@crfreenet.org>
*
* 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.
*
* Code is based on David Boucher's viafb (http://davesdomain.org.uk/viafb/)
* which is based on the code of neofb.
*/
#include <linux/version.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/tty.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/fb.h>
#include <linux/svga.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/console.h> /* Why should fb driver call console functions? because acquire_console_sem() */
#include <video/vga.h>
#ifdef CONFIG_MTRR
#include <asm/mtrr.h>
#endif
struct s3fb_info {
int chip, rev, mclk_freq;
int mtrr_reg;
struct vgastate state;
struct mutex open_lock;
unsigned int ref_count;
u32 pseudo_palette[16];
};
/* ------------------------------------------------------------------------- */
static const struct svga_fb_format s3fb_formats[] = {
{ 0, {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0}, 0,
FB_TYPE_TEXT, FB_AUX_TEXT_SVGA_STEP4, FB_VISUAL_PSEUDOCOLOR, 8, 16},
{ 4, {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0}, 0,
FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_PSEUDOCOLOR, 8, 16},
{ 4, {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0}, 1,
FB_TYPE_INTERLEAVED_PLANES, 1, FB_VISUAL_PSEUDOCOLOR, 8, 16},
{ 8, {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0}, 0,
FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_PSEUDOCOLOR, 4, 8},
{16, {10, 5, 0}, {5, 5, 0}, {0, 5, 0}, {0, 0, 0}, 0,
FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_TRUECOLOR, 2, 4},
{16, {11, 5, 0}, {5, 6, 0}, {0, 5, 0}, {0, 0, 0}, 0,
FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_TRUECOLOR, 2, 4},
{24, {16, 8, 0}, {8, 8, 0}, {0, 8, 0}, {0, 0, 0}, 0,
FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_TRUECOLOR, 1, 2},
{32, {16, 8, 0}, {8, 8, 0}, {0, 8, 0}, {0, 0, 0}, 0,
FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_TRUECOLOR, 1, 2},
SVGA_FORMAT_END
};
static const struct svga_pll s3_pll = {3, 129, 3, 33, 0, 3,
35000, 240000, 14318};
static const int s3_memsizes[] = {4096, 0, 3072, 8192, 2048, 6144, 1024, 512};
static const char * const s3_names[] = {"S3 Unknown", "S3 Trio32", "S3 Trio64", "S3 Trio64V+",
"S3 Trio64UV+", "S3 Trio64V2/DX", "S3 Trio64V2/GX",
"S3 Plato/PX", "S3 Aurora64VP", "S3 Virge",
"S3 Virge/VX", "S3 Virge/DX", "S3 Virge/GX",
"S3 Virge/GX2", "S3 Virge/GX2P", "S3 Virge/GX2P"};
#define CHIP_UNKNOWN 0x00
#define CHIP_732_TRIO32 0x01
#define CHIP_764_TRIO64 0x02
#define CHIP_765_TRIO64VP 0x03
#define CHIP_767_TRIO64UVP 0x04
#define CHIP_775_TRIO64V2_DX 0x05
#define CHIP_785_TRIO64V2_GX 0x06
#define CHIP_551_PLATO_PX 0x07
#define CHIP_M65_AURORA64VP 0x08
#define CHIP_325_VIRGE 0x09
#define CHIP_988_VIRGE_VX 0x0A
#define CHIP_375_VIRGE_DX 0x0B
#define CHIP_385_VIRGE_GX 0x0C
#define CHIP_356_VIRGE_GX2 0x0D
#define CHIP_357_VIRGE_GX2P 0x0E
#define CHIP_359_VIRGE_GX2P 0x0F
#define CHIP_XXX_TRIO 0x80
#define CHIP_XXX_TRIO64V2_DXGX 0x81
#define CHIP_XXX_VIRGE_DXGX 0x82
#define CHIP_UNDECIDED_FLAG 0x80
#define CHIP_MASK 0xFF
/* CRT timing register sets */
static const struct vga_regset s3_h_total_regs[] = {{0x00, 0, 7}, {0x5D, 0, 0}, VGA_REGSET_END};
static const struct vga_regset s3_h_display_regs[] = {{0x01, 0, 7}, {0x5D, 1, 1}, VGA_REGSET_END};
static const struct vga_regset s3_h_blank_start_regs[] = {{0x02, 0, 7}, {0x5D, 2, 2}, VGA_REGSET_END};
static const struct vga_regset s3_h_blank_end_regs[] = {{0x03, 0, 4}, {0x05, 7, 7}, VGA_REGSET_END};
static const struct vga_regset s3_h_sync_start_regs[] = {{0x04, 0, 7}, {0x5D, 4, 4}, VGA_REGSET_END};
static const struct vga_regset s3_h_sync_end_regs[] = {{0x05, 0, 4}, VGA_REGSET_END};
static const struct vga_regset s3_v_total_regs[] = {{0x06, 0, 7}, {0x07, 0, 0}, {0x07, 5, 5}, {0x5E, 0, 0}, VGA_REGSET_END};
static const struct vga_regset s3_v_display_regs[] = {{0x12, 0, 7}, {0x07, 1, 1}, {0x07, 6, 6}, {0x5E, 1, 1}, VGA_REGSET_END};
static const struct vga_regset s3_v_blank_start_regs[] = {{0x15, 0, 7}, {0x07, 3, 3}, {0x09, 5, 5}, {0x5E, 2, 2}, VGA_REGSET_END};
static const struct vga_regset s3_v_blank_end_regs[] = {{0x16, 0, 7}, VGA_REGSET_END};
static const struct vga_regset s3_v_sync_start_regs[] = {{0x10, 0, 7}, {0x07, 2, 2}, {0x07, 7, 7}, {0x5E, 4, 4}, VGA_REGSET_END};
static const struct vga_regset s3_v_sync_end_regs[] = {{0x11, 0, 3}, VGA_REGSET_END};
static const struct vga_regset s3_line_compare_regs[] = {{0x18, 0, 7}, {0x07, 4, 4}, {0x09, 6, 6}, {0x5E, 6, 6}, VGA_REGSET_END};
static const struct vga_regset s3_start_address_regs[] = {{0x0d, 0, 7}, {0x0c, 0, 7}, {0x31, 4, 5}, {0x51, 0, 1}, VGA_REGSET_END};
static const struct vga_regset s3_offset_regs[] = {{0x13, 0, 7}, {0x51, 4, 5}, VGA_REGSET_END}; /* set 0x43 bit 2 to 0 */
static const struct svga_timing_regs s3_timing_regs = {
s3_h_total_regs, s3_h_display_regs, s3_h_blank_start_regs,
s3_h_blank_end_regs, s3_h_sync_start_regs, s3_h_sync_end_regs,
s3_v_total_regs, s3_v_display_regs, s3_v_blank_start_regs,
s3_v_blank_end_regs, s3_v_sync_start_regs, s3_v_sync_end_regs,
};
/* ------------------------------------------------------------------------- */
/* Module parameters */
static char *mode = "640x480-8@60";
#ifdef CONFIG_MTRR
static int mtrr = 1;
#endif
static int fasttext = 1;
MODULE_AUTHOR("(c) 2006-2007 Ondrej Zajicek <santiago@crfreenet.org>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("fbdev driver for S3 Trio/Virge");
module_param(mode, charp, 0444);
MODULE_PARM_DESC(mode, "Default video mode ('640x480-8@60', etc)");
#ifdef CONFIG_MTRR
module_param(mtrr, int, 0444);
MODULE_PARM_DESC(mtrr, "Enable write-combining with MTRR (1=enable, 0=disable, default=1)");
#endif
module_param(fasttext, int, 0644);
MODULE_PARM_DESC(fasttext, "Enable S3 fast text mode (1=enable, 0=disable, default=1)");
/* ------------------------------------------------------------------------- */
/* Set font in S3 fast text mode */
static void s3fb_settile_fast(struct fb_info *info, struct fb_tilemap *map)
{
const u8 *font = map->data;
u8 __iomem *fb = (u8 __iomem *) info->screen_base;
int i, c;
if ((map->width != 8) || (map->height != 16) ||
(map->depth != 1) || (map->length != 256)) {
printk(KERN_ERR "fb%d: unsupported font parameters: width %d, height %d, depth %d, length %d\n",
info->node, map->width, map->height, map->depth, map->length);
return;
}
fb += 2;
for (i = 0; i < map->height; i++) {
for (c = 0; c < map->length; c++) {
fb_writeb(font[c * map->height + i], fb + c * 4);
}
fb += 1024;
}
}
static struct fb_tile_ops s3fb_tile_ops = {
.fb_settile = svga_settile,
.fb_tilecopy = svga_tilecopy,
.fb_tilefill = svga_tilefill,
.fb_tileblit = svga_tileblit,
.fb_tilecursor = svga_tilecursor,
.fb_get_tilemax = svga_get_tilemax,
};
static struct fb_tile_ops s3fb_fast_tile_ops = {
.fb_settile = s3fb_settile_fast,
.fb_tilecopy = svga_tilecopy,
.fb_tilefill = svga_tilefill,
.fb_tileblit = svga_tileblit,
.fb_tilecursor = svga_tilecursor,
.fb_get_tilemax = svga_get_tilemax,
};
/* ------------------------------------------------------------------------- */
/* image data is MSB-first, fb structure is MSB-first too */
static inline u32 expand_color(u32 c)
{
return ((c & 1) | ((c & 2) << 7) | ((c & 4) << 14) | ((c & 8) << 21)) * 0xFF;
}
/* s3fb_iplan_imageblit silently assumes that almost everything is 8-pixel aligned */
static void s3fb_iplan_imageblit(struct fb_info *info, const struct fb_image *image)
{
u32 fg = expand_color(image->fg_color);
u32 bg = expand_color(image->bg_color);
const u8 *src1, *src;
u8 __iomem *dst1;
u32 __iomem *dst;
u32 val;
int x, y;
src1 = image->data;
dst1 = info->screen_base + (image->dy * info->fix.line_length)
+ ((image->dx / 8) * 4);
for (y = 0; y < image->height; y++) {
src = src1;
dst = (u32 __iomem *) dst1;
for (x = 0; x < image->width; x += 8) {
val = *(src++) * 0x01010101;
val = (val & fg) | (~val & bg);
fb_writel(val, dst++);
}
src1 += image->width / 8;
dst1 += info->fix.line_length;
}
}
/* s3fb_iplan_fillrect silently assumes that almost everything is 8-pixel aligned */
static void s3fb_iplan_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
{
u32 fg = expand_color(rect->color);
u8 __iomem *dst1;
u32 __iomem *dst;
int x, y;
dst1 = info->screen_base + (rect->dy * info->fix.line_length)
+ ((rect->dx / 8) * 4);
for (y = 0; y < rect->height; y++) {
dst = (u32 __iomem *) dst1;
for (x = 0; x < rect->width; x += 8) {
fb_writel(fg, dst++);
}
dst1 += info->fix.line_length;
}
}
/* image data is MSB-first, fb structure is high-nibble-in-low-byte-first */
static inline u32 expand_pixel(u32 c)
{
return (((c & 1) << 24) | ((c & 2) << 27) | ((c & 4) << 14) | ((c & 8) << 17) |
((c & 16) << 4) | ((c & 32) << 7) | ((c & 64) >> 6) | ((c & 128) >> 3)) * 0xF;
}
/* s3fb_cfb4_imageblit silently assumes that almost everything is 8-pixel aligned */
static void s3fb_cfb4_imageblit(struct fb_info *info, const struct fb_image *image)
{
u32 fg = image->fg_color * 0x11111111;
u32 bg = image->bg_color * 0x11111111;
const u8 *src1, *src;
u8 __iomem *dst1;
u32 __iomem *dst;
u32 val;
int x, y;
src1 = image->data;
dst1 = info->screen_base + (image->dy * info->fix.line_length)
+ ((image->dx / 8) * 4);
for (y = 0; y < image->height; y++) {
src = src1;
dst = (u32 __iomem *) dst1;
for (x = 0; x < image->width; x += 8) {
val = expand_pixel(*(src++));
val = (val & fg) | (~val & bg);
fb_writel(val, dst++);
}
src1 += image->width / 8;
dst1 += info->fix.line_length;
}
}
static void s3fb_imageblit(struct fb_info *info, const struct fb_image *image)
{
if ((info->var.bits_per_pixel == 4) && (image->depth == 1)
&& ((image->width % 8) == 0) && ((image->dx % 8) == 0)) {
if (info->fix.type == FB_TYPE_INTERLEAVED_PLANES)
s3fb_iplan_imageblit(info, image);
else
s3fb_cfb4_imageblit(info, image);
} else
cfb_imageblit(info, image);
}
static void s3fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
{
if ((info->var.bits_per_pixel == 4)
&& ((rect->width % 8) == 0) && ((rect->dx % 8) == 0)
&& (info->fix.type == FB_TYPE_INTERLEAVED_PLANES))
s3fb_iplan_fillrect(info, rect);
else
cfb_fillrect(info, rect);
}
/* ------------------------------------------------------------------------- */
static void s3_set_pixclock(struct fb_info *info, u32 pixclock)
{
u16 m, n, r;
u8 regval;
int rv;
rv = svga_compute_pll(&s3_pll, 1000000000 / pixclock, &m, &n, &r, info->node);
if (rv < 0) {
printk(KERN_ERR "fb%d: cannot set requested pixclock, keeping old value\n", info->node);
return;
}
/* Set VGA misc register */
regval = vga_r(NULL, VGA_MIS_R);
vga_w(NULL, VGA_MIS_W, regval | VGA_MIS_ENB_PLL_LOAD);
/* Set S3 clock registers */
vga_wseq(NULL, 0x12, ((n - 2) | (r << 5)));
vga_wseq(NULL, 0x13, m - 2);
udelay(1000);
/* Activate clock - write 0, 1, 0 to seq/15 bit 5 */
regval = vga_rseq (NULL, 0x15); /* | 0x80; */
vga_wseq(NULL, 0x15, regval & ~(1<<5));
vga_wseq(NULL, 0x15, regval | (1<<5));
vga_wseq(NULL, 0x15, regval & ~(1<<5));
}
/* Open framebuffer */
static int s3fb_open(struct fb_info *info, int user)
{
struct s3fb_info *par = info->par;
mutex_lock(&(par->open_lock));
if (par->ref_count == 0) {
memset(&(par->state), 0, sizeof(struct vgastate));
par->state.flags = VGA_SAVE_MODE | VGA_SAVE_FONTS | VGA_SAVE_CMAP;
par->state.num_crtc = 0x70;
par->state.num_seq = 0x20;
save_vga(&(par->state));
}
par->ref_count++;
mutex_unlock(&(par->open_lock));
return 0;
}
/* Close framebuffer */
static int s3fb_release(struct fb_info *info, int user)
{
struct s3fb_info *par = info->par;
mutex_lock(&(par->open_lock));
if (par->ref_count == 0) {
mutex_unlock(&(par->open_lock));
return -EINVAL;
}
if (par->ref_count == 1)
restore_vga(&(par->state));
par->ref_count--;
mutex_unlock(&(par->open_lock));
return 0;
}
/* Validate passed in var */
static int s3fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
struct s3fb_info *par = info->par;
int rv, mem, step;
u16 m, n, r;
/* Find appropriate format */
rv = svga_match_format (s3fb_formats, var, NULL);
/* 32bpp mode is not supported on VIRGE VX,
24bpp is not supported on others */
if ((par->chip == CHIP_988_VIRGE_VX) ? (rv == 7) : (rv == 6))
rv = -EINVAL;
if (rv < 0) {
printk(KERN_ERR "fb%d: unsupported mode requested\n", info->node);
return rv;
}
/* Do not allow to have real resoulution larger than virtual */
if (var->xres > var->xres_virtual)
var->xres_virtual = var->xres;
if (var->yres > var->yres_virtual)
var->yres_virtual = var->yres;
/* Round up xres_virtual to have proper alignment of lines */
step = s3fb_formats[rv].xresstep - 1;
var->xres_virtual = (var->xres_virtual+step) & ~step;
/* Check whether have enough memory */
mem = ((var->bits_per_pixel * var->xres_virtual) >> 3) * var->yres_virtual;
if (mem > info->screen_size) {
printk(KERN_ERR "fb%d: not enough framebuffer memory (%d kB requested , %d kB available)\n",
info->node, mem >> 10, (unsigned int) (info->screen_size >> 10));
return -EINVAL;
}
rv = svga_check_timings (&s3_timing_regs, var, info->node);
if (rv < 0) {
printk(KERN_ERR "fb%d: invalid timings requested\n", info->node);
return rv;
}
rv = svga_compute_pll(&s3_pll, PICOS2KHZ(var->pixclock), &m, &n, &r,
info->node);
if (rv < 0) {
printk(KERN_ERR "fb%d: invalid pixclock value requested\n",
info->node);
return rv;
}
return 0;
}
/* Set video mode from par */
static int s3fb_set_par(struct fb_info *info)
{
struct s3fb_info *par = info->par;
u32 value, mode, hmul, offset_value, screen_size, multiplex;
u32 bpp = info->var.bits_per_pixel;
if (bpp != 0) {
info->fix.ypanstep = 1;
info->fix.line_length = (info->var.xres_virtual * bpp) / 8;
info->flags &= ~FBINFO_MISC_TILEBLITTING;
info->tileops = NULL;
/* in 4bpp supports 8p wide tiles only, any tiles otherwise */
info->pixmap.blit_x = (bpp == 4) ? (1 << (8 - 1)) : (~(u32)0);
info->pixmap.blit_y = ~(u32)0;
offset_value = (info->var.xres_virtual * bpp) / 64;
screen_size = info->var.yres_virtual * info->fix.line_length;
} else {
info->fix.ypanstep = 16;
info->fix.line_length = 0;
info->flags |= FBINFO_MISC_TILEBLITTING;
info->tileops = fasttext ? &s3fb_fast_tile_ops : &s3fb_tile_ops;
/* supports 8x16 tiles only */
info->pixmap.blit_x = 1 << (8 - 1);
info->pixmap.blit_y = 1 << (16 - 1);
offset_value = info->var.xres_virtual / 16;
screen_size = (info->var.xres_virtual * info->var.yres_virtual) / 64;
}
info->var.xoffset = 0;
info->var.yoffset = 0;
info->var.activate = FB_ACTIVATE_NOW;
/* Unlock registers */
vga_wcrt(NULL, 0x38, 0x48);
vga_wcrt(NULL, 0x39, 0xA5);
vga_wseq(NULL, 0x08, 0x06);
svga_wcrt_mask(0x11, 0x00, 0x80);
/* Blank screen and turn off sync */
svga_wseq_mask(0x01, 0x20, 0x20);
svga_wcrt_mask(0x17, 0x00, 0x80);
/* Set default values */
svga_set_default_gfx_regs();
svga_set_default_atc_regs();
svga_set_default_seq_regs();
svga_set_default_crt_regs();
svga_wcrt_multi(s3_line_compare_regs, 0xFFFFFFFF);
svga_wcrt_multi(s3_start_address_regs, 0);
/* S3 specific initialization */
svga_wcrt_mask(0x58, 0x10, 0x10); /* enable linear framebuffer */
svga_wcrt_mask(0x31, 0x08, 0x08); /* enable sequencer access to framebuffer above 256 kB */
/* svga_wcrt_mask(0x33, 0x08, 0x08); */ /* DDR ? */
/* svga_wcrt_mask(0x43, 0x01, 0x01); */ /* DDR ? */
svga_wcrt_mask(0x33, 0x00, 0x08); /* no DDR ? */
svga_wcrt_mask(0x43, 0x00, 0x01); /* no DDR ? */
svga_wcrt_mask(0x5D, 0x00, 0x28); // Clear strange HSlen bits
/* svga_wcrt_mask(0x58, 0x03, 0x03); */
/* svga_wcrt_mask(0x53, 0x12, 0x13); */ /* enable MMIO */
/* svga_wcrt_mask(0x40, 0x08, 0x08); */ /* enable write buffer */
/* Set the offset register */
pr_debug("fb%d: offset register : %d\n", info->node, offset_value);
svga_wcrt_multi(s3_offset_regs, offset_value);
vga_wcrt(NULL, 0x54, 0x18); /* M parameter */
vga_wcrt(NULL, 0x60, 0xff); /* N parameter */
vga_wcrt(NULL, 0x61, 0xff); /* L parameter */
vga_wcrt(NULL, 0x62, 0xff); /* L parameter */
vga_wcrt(NULL, 0x3A, 0x35);
svga_wattr(0x33, 0x00);
if (info->var.vmode & FB_VMODE_DOUBLE)
svga_wcrt_mask(0x09, 0x80, 0x80);
else
svga_wcrt_mask(0x09, 0x00, 0x80);
if (info->var.vmode & FB_VMODE_INTERLACED)
svga_wcrt_mask(0x42, 0x20, 0x20);
else
svga_wcrt_mask(0x42, 0x00, 0x20);
/* Disable hardware graphics cursor */
svga_wcrt_mask(0x45, 0x00, 0x01);
/* Disable Streams engine */
svga_wcrt_mask(0x67, 0x00, 0x0C);
mode = svga_match_format(s3fb_formats, &(info->var), &(info->fix));
/* S3 virge DX hack */
if (par->chip == CHIP_375_VIRGE_DX) {
vga_wcrt(NULL, 0x86, 0x80);
vga_wcrt(NULL, 0x90, 0x00);
}
/* S3 virge VX hack */
if (par->chip == CHIP_988_VIRGE_VX) {
vga_wcrt(NULL, 0x50, 0x00);
vga_wcrt(NULL, 0x67, 0x50);
vga_wcrt(NULL, 0x63, (mode <= 2) ? 0x90 : 0x09);
vga_wcrt(NULL, 0x66, 0x90);
}
svga_wcrt_mask(0x31, 0x00, 0x40);
multiplex = 0;
hmul = 1;
/* Set mode-specific register values */
switch (mode) {
case 0:
pr_debug("fb%d: text mode\n", info->node);
svga_set_textmode_vga_regs();
/* Set additional registers like in 8-bit mode */
svga_wcrt_mask(0x50, 0x00, 0x30);
svga_wcrt_mask(0x67, 0x00, 0xF0);
/* Disable enhanced mode */
svga_wcrt_mask(0x3A, 0x00, 0x30);
if (fasttext) {
pr_debug("fb%d: high speed text mode set\n", info->node);
svga_wcrt_mask(0x31, 0x40, 0x40);
}
break;
case 1:
pr_debug("fb%d: 4 bit pseudocolor\n", info->node);
vga_wgfx(NULL, VGA_GFX_MODE, 0x40);
/* Set additional registers like in 8-bit mode */
svga_wcrt_mask(0x50, 0x00, 0x30);
svga_wcrt_mask(0x67, 0x00, 0xF0);
/* disable enhanced mode */
svga_wcrt_mask(0x3A, 0x00, 0x30);
break;
case 2:
pr_debug("fb%d: 4 bit pseudocolor, planar\n", info->node);
/* Set additional registers like in 8-bit mode */
svga_wcrt_mask(0x50, 0x00, 0x30);
svga_wcrt_mask(0x67, 0x00, 0xF0);
/* disable enhanced mode */
svga_wcrt_mask(0x3A, 0x00, 0x30);
break;
case 3:
pr_debug("fb%d: 8 bit pseudocolor\n", info->node);
if (info->var.pixclock > 20000) {
svga_wcrt_mask(0x50, 0x00, 0x30);
svga_wcrt_mask(0x67, 0x00, 0xF0);
} else {
svga_wcrt_mask(0x50, 0x00, 0x30);
svga_wcrt_mask(0x67, 0x10, 0xF0);
multiplex = 1;
}
break;
case 4:
pr_debug("fb%d: 5/5/5 truecolor\n", info->node);
if (par->chip == CHIP_988_VIRGE_VX) {
if (info->var.pixclock > 20000)
svga_wcrt_mask(0x67, 0x20, 0xF0);
else
svga_wcrt_mask(0x67, 0x30, 0xF0);
} else {
svga_wcrt_mask(0x50, 0x10, 0x30);
svga_wcrt_mask(0x67, 0x30, 0xF0);
hmul = 2;
}
break;
case 5:
pr_debug("fb%d: 5/6/5 truecolor\n", info->node);
if (par->chip == CHIP_988_VIRGE_VX) {
if (info->var.pixclock > 20000)
svga_wcrt_mask(0x67, 0x40, 0xF0);
else
svga_wcrt_mask(0x67, 0x50, 0xF0);
} else {
svga_wcrt_mask(0x50, 0x10, 0x30);
svga_wcrt_mask(0x67, 0x50, 0xF0);
hmul = 2;
}
break;
case 6:
/* VIRGE VX case */
pr_debug("fb%d: 8/8/8 truecolor\n", info->node);
svga_wcrt_mask(0x67, 0xD0, 0xF0);
break;
case 7:
pr_debug("fb%d: 8/8/8/8 truecolor\n", info->node);
svga_wcrt_mask(0x50, 0x30, 0x30);
svga_wcrt_mask(0x67, 0xD0, 0xF0);
break;
default:
printk(KERN_ERR "fb%d: unsupported mode - bug\n", info->node);
return -EINVAL;
}
if (par->chip != CHIP_988_VIRGE_VX) {
svga_wseq_mask(0x15, multiplex ? 0x10 : 0x00, 0x10);
svga_wseq_mask(0x18, multiplex ? 0x80 : 0x00, 0x80);
}
s3_set_pixclock(info, info->var.pixclock);
svga_set_timings(&s3_timing_regs, &(info->var), hmul, 1,
(info->var.vmode & FB_VMODE_DOUBLE) ? 2 : 1,
(info->var.vmode & FB_VMODE_INTERLACED) ? 2 : 1,
hmul, info->node);
/* Set interlaced mode start/end register */
value = info->var.xres + info->var.left_margin + info->var.right_margin + info->var.hsync_len;
value = ((value * hmul) / 8) - 5;
vga_wcrt(NULL, 0x3C, (value + 1) / 2);
memset_io(info->screen_base, 0x00, screen_size);
/* Device and screen back on */
svga_wcrt_mask(0x17, 0x80, 0x80);
svga_wseq_mask(0x01, 0x00, 0x20);
return 0;
}
/* Set a colour register */
static int s3fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
u_int transp, struct fb_info *fb)
{
switch (fb->var.bits_per_pixel) {
case 0:
case 4:
if (regno >= 16)
return -EINVAL;
if ((fb->var.bits_per_pixel == 4) &&
(fb->var.nonstd == 0)) {
outb(0xF0, VGA_PEL_MSK);
outb(regno*16, VGA_PEL_IW);
} else {
outb(0x0F, VGA_PEL_MSK);
outb(regno, VGA_PEL_IW);
}
outb(red >> 10, VGA_PEL_D);
outb(green >> 10, VGA_PEL_D);
outb(blue >> 10, VGA_PEL_D);
break;
case 8:
if (regno >= 256)
return -EINVAL;
outb(0xFF, VGA_PEL_MSK);
outb(regno, VGA_PEL_IW);
outb(red >> 10, VGA_PEL_D);
outb(green >> 10, VGA_PEL_D);
outb(blue >> 10, VGA_PEL_D);
break;
case 16:
if (regno >= 16)
return 0;
if (fb->var.green.length == 5)
((u32*)fb->pseudo_palette)[regno] = ((red & 0xF800) >> 1) |
((green & 0xF800) >> 6) | ((blue & 0xF800) >> 11);
else if (fb->var.green.length == 6)
((u32*)fb->pseudo_palette)[regno] = (red & 0xF800) |
((green & 0xFC00) >> 5) | ((blue & 0xF800) >> 11);
else return -EINVAL;
break;
case 24:
case 32:
if (regno >= 16)
return 0;
((u32*)fb->pseudo_palette)[regno] = ((red & 0xFF00) << 8) |
(green & 0xFF00) | ((blue & 0xFF00) >> 8);
break;
default:
return -EINVAL;
}
return 0;
}
/* Set the display blanking state */
static int s3fb_blank(int blank_mode, struct fb_info *info)
{
switch (blank_mode) {
case FB_BLANK_UNBLANK:
pr_debug("fb%d: unblank\n", info->node);
svga_wcrt_mask(0x56, 0x00, 0x06);
svga_wseq_mask(0x01, 0x00, 0x20);
break;
case FB_BLANK_NORMAL:
pr_debug("fb%d: blank\n", info->node);
svga_wcrt_mask(0x56, 0x00, 0x06);
svga_wseq_mask(0x01, 0x20, 0x20);
break;
case FB_BLANK_HSYNC_SUSPEND:
pr_debug("fb%d: hsync\n", info->node);
svga_wcrt_mask(0x56, 0x02, 0x06);
svga_wseq_mask(0x01, 0x20, 0x20);
break;
case FB_BLANK_VSYNC_SUSPEND:
pr_debug("fb%d: vsync\n", info->node);
svga_wcrt_mask(0x56, 0x04, 0x06);
svga_wseq_mask(0x01, 0x20, 0x20);
break;
case FB_BLANK_POWERDOWN:
pr_debug("fb%d: sync down\n", info->node);
svga_wcrt_mask(0x56, 0x06, 0x06);
svga_wseq_mask(0x01, 0x20, 0x20);
break;
}
return 0;
}
/* Pan the display */
static int s3fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info) {
unsigned int offset;
/* Calculate the offset */
if (var->bits_per_pixel == 0) {
offset = (var->yoffset / 16) * (var->xres_virtual / 2) + (var->xoffset / 2);
offset = offset >> 2;
} else {
offset = (var->yoffset * info->fix.line_length) +
(var->xoffset * var->bits_per_pixel / 8);
offset = offset >> 2;
}
/* Set the offset */
svga_wcrt_multi(s3_start_address_regs, offset);
return 0;
}
/* ------------------------------------------------------------------------- */
/* Frame buffer operations */
static struct fb_ops s3fb_ops = {
.owner = THIS_MODULE,
.fb_open = s3fb_open,
.fb_release = s3fb_release,
.fb_check_var = s3fb_check_var,
.fb_set_par = s3fb_set_par,
.fb_setcolreg = s3fb_setcolreg,
.fb_blank = s3fb_blank,
.fb_pan_display = s3fb_pan_display,
.fb_fillrect = s3fb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = s3fb_imageblit,
.fb_get_caps = svga_get_caps,
};
/* ------------------------------------------------------------------------- */
static int __devinit s3_identification(int chip)
{
if (chip == CHIP_XXX_TRIO) {
u8 cr30 = vga_rcrt(NULL, 0x30);
u8 cr2e = vga_rcrt(NULL, 0x2e);
u8 cr2f = vga_rcrt(NULL, 0x2f);
if ((cr30 == 0xE0) || (cr30 == 0xE1)) {
if (cr2e == 0x10)
return CHIP_732_TRIO32;
if (cr2e == 0x11) {
if (! (cr2f & 0x40))
return CHIP_764_TRIO64;
else
return CHIP_765_TRIO64VP;
}
}
}
if (chip == CHIP_XXX_TRIO64V2_DXGX) {
u8 cr6f = vga_rcrt(NULL, 0x6f);
if (! (cr6f & 0x01))
return CHIP_775_TRIO64V2_DX;
else
return CHIP_785_TRIO64V2_GX;
}
if (chip == CHIP_XXX_VIRGE_DXGX) {
u8 cr6f = vga_rcrt(NULL, 0x6f);
if (! (cr6f & 0x01))
return CHIP_375_VIRGE_DX;
else
return CHIP_385_VIRGE_GX;
}
return CHIP_UNKNOWN;
}
/* PCI probe */
static int __devinit s3_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
{
struct fb_info *info;
struct s3fb_info *par;
int rc;
u8 regval, cr38, cr39;
/* Ignore secondary VGA device because there is no VGA arbitration */
if (! svga_primary_device(dev)) {
dev_info(&(dev->dev), "ignoring secondary device\n");
return -ENODEV;
}
/* Allocate and fill driver data structure */
info = framebuffer_alloc(sizeof(struct s3fb_info), NULL);
if (!info) {
dev_err(&(dev->dev), "cannot allocate memory\n");
return -ENOMEM;
}
par = info->par;
mutex_init(&par->open_lock);
info->flags = FBINFO_PARTIAL_PAN_OK | FBINFO_HWACCEL_YPAN;
info->fbops = &s3fb_ops;
/* Prepare PCI device */
rc = pci_enable_device(dev);
if (rc < 0) {
dev_err(&(dev->dev), "cannot enable PCI device\n");
goto err_enable_device;
}
rc = pci_request_regions(dev, "s3fb");
if (rc < 0) {
dev_err(&(dev->dev), "cannot reserve framebuffer region\n");
goto err_request_regions;
}
info->fix.smem_start = pci_resource_start(dev, 0);
info->fix.smem_len = pci_resource_len(dev, 0);
/* Map physical IO memory address into kernel space */
info->screen_base = pci_iomap(dev, 0, 0);
if (! info->screen_base) {
rc = -ENOMEM;
dev_err(&(dev->dev), "iomap for framebuffer failed\n");
goto err_iomap;
}
/* Unlock regs */
cr38 = vga_rcrt(NULL, 0x38);
cr39 = vga_rcrt(NULL, 0x39);
vga_wseq(NULL, 0x08, 0x06);
vga_wcrt(NULL, 0x38, 0x48);
vga_wcrt(NULL, 0x39, 0xA5);
/* Find how many physical memory there is on card */
/* 0x36 register is accessible even if other registers are locked */
regval = vga_rcrt(NULL, 0x36);
info->screen_size = s3_memsizes[regval >> 5] << 10;
info->fix.smem_len = info->screen_size;
par->chip = id->driver_data & CHIP_MASK;
par->rev = vga_rcrt(NULL, 0x2f);
if (par->chip & CHIP_UNDECIDED_FLAG)
par->chip = s3_identification(par->chip);
/* Find MCLK frequency */
regval = vga_rseq(NULL, 0x10);
par->mclk_freq = ((vga_rseq(NULL, 0x11) + 2) * 14318) / ((regval & 0x1F) + 2);
par->mclk_freq = par->mclk_freq >> (regval >> 5);
/* Restore locks */
vga_wcrt(NULL, 0x38, cr38);
vga_wcrt(NULL, 0x39, cr39);
strcpy(info->fix.id, s3_names [par->chip]);
info->fix.mmio_start = 0;
info->fix.mmio_len = 0;
info->fix.type = FB_TYPE_PACKED_PIXELS;
info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
info->fix.ypanstep = 0;
info->fix.accel = FB_ACCEL_NONE;
info->pseudo_palette = (void*) (par->pseudo_palette);
/* Prepare startup mode */
rc = fb_find_mode(&(info->var), info, mode, NULL, 0, NULL, 8);
if (! ((rc == 1) || (rc == 2))) {
rc = -EINVAL;
dev_err(&(dev->dev), "mode %s not found\n", mode);
goto err_find_mode;
}
rc = fb_alloc_cmap(&info->cmap, 256, 0);
if (rc < 0) {
dev_err(&(dev->dev), "cannot allocate colormap\n");
goto err_alloc_cmap;
}
rc = register_framebuffer(info);
if (rc < 0) {
dev_err(&(dev->dev), "cannot register framebuffer\n");
goto err_reg_fb;
}
printk(KERN_INFO "fb%d: %s on %s, %d MB RAM, %d MHz MCLK\n", info->node, info->fix.id,
pci_name(dev), info->fix.smem_len >> 20, (par->mclk_freq + 500) / 1000);
if (par->chip == CHIP_UNKNOWN)
printk(KERN_INFO "fb%d: unknown chip, CR2D=%x, CR2E=%x, CRT2F=%x, CRT30=%x\n",
info->node, vga_rcrt(NULL, 0x2d), vga_rcrt(NULL, 0x2e),
vga_rcrt(NULL, 0x2f), vga_rcrt(NULL, 0x30));
/* Record a reference to the driver data */
pci_set_drvdata(dev, info);
#ifdef CONFIG_MTRR
if (mtrr) {
par->mtrr_reg = -1;
par->mtrr_reg = mtrr_add(info->fix.smem_start, info->fix.smem_len, MTRR_TYPE_WRCOMB, 1);
}
#endif
return 0;
/* Error handling */
err_reg_fb:
fb_dealloc_cmap(&info->cmap);
err_alloc_cmap:
err_find_mode:
pci_iounmap(dev, info->screen_base);
err_iomap:
pci_release_regions(dev);
err_request_regions:
/* pci_disable_device(dev); */
err_enable_device:
framebuffer_release(info);
return rc;
}
/* PCI remove */
static void __devexit s3_pci_remove(struct pci_dev *dev)
{
struct fb_info *info = pci_get_drvdata(dev);
if (info) {
#ifdef CONFIG_MTRR
struct s3fb_info *par = info->par;
if (par->mtrr_reg >= 0) {
mtrr_del(par->mtrr_reg, 0, 0);
par->mtrr_reg = -1;
}
#endif
unregister_framebuffer(info);
fb_dealloc_cmap(&info->cmap);
pci_iounmap(dev, info->screen_base);
pci_release_regions(dev);
/* pci_disable_device(dev); */
pci_set_drvdata(dev, NULL);
framebuffer_release(info);
}
}
/* PCI suspend */
static int s3_pci_suspend(struct pci_dev* dev, pm_message_t state)
{
struct fb_info *info = pci_get_drvdata(dev);
struct s3fb_info *par = info->par;
dev_info(&(dev->dev), "suspend\n");
acquire_console_sem();
mutex_lock(&(par->open_lock));
if ((state.event == PM_EVENT_FREEZE) || (par->ref_count == 0)) {
mutex_unlock(&(par->open_lock));
release_console_sem();
return 0;
}
fb_set_suspend(info, 1);
pci_save_state(dev);
pci_disable_device(dev);
pci_set_power_state(dev, pci_choose_state(dev, state));
mutex_unlock(&(par->open_lock));
release_console_sem();
return 0;
}
/* PCI resume */
static int s3_pci_resume(struct pci_dev* dev)
{
struct fb_info *info = pci_get_drvdata(dev);
struct s3fb_info *par = info->par;
int err;
dev_info(&(dev->dev), "resume\n");
acquire_console_sem();
mutex_lock(&(par->open_lock));
if (par->ref_count == 0) {
mutex_unlock(&(par->open_lock));
release_console_sem();
return 0;
}
pci_set_power_state(dev, PCI_D0);
pci_restore_state(dev);
err = pci_enable_device(dev);
if (err) {
mutex_unlock(&(par->open_lock));
release_console_sem();
dev_err(&(dev->dev), "error %d enabling device for resume\n", err);
return err;
}
pci_set_master(dev);
s3fb_set_par(info);
fb_set_suspend(info, 0);
mutex_unlock(&(par->open_lock));
release_console_sem();
return 0;
}
/* List of boards that we are trying to support */
static struct pci_device_id s3_devices[] __devinitdata = {
{PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8810), .driver_data = CHIP_XXX_TRIO},
{PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8811), .driver_data = CHIP_XXX_TRIO},
{PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8812), .driver_data = CHIP_M65_AURORA64VP},
{PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8814), .driver_data = CHIP_767_TRIO64UVP},
{PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8901), .driver_data = CHIP_XXX_TRIO64V2_DXGX},
{PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8902), .driver_data = CHIP_551_PLATO_PX},
{PCI_DEVICE(PCI_VENDOR_ID_S3, 0x5631), .driver_data = CHIP_325_VIRGE},
{PCI_DEVICE(PCI_VENDOR_ID_S3, 0x883D), .driver_data = CHIP_988_VIRGE_VX},
{PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8A01), .driver_data = CHIP_XXX_VIRGE_DXGX},
{PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8A10), .driver_data = CHIP_356_VIRGE_GX2},
{PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8A11), .driver_data = CHIP_357_VIRGE_GX2P},
{PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8A12), .driver_data = CHIP_359_VIRGE_GX2P},
{0, 0, 0, 0, 0, 0, 0}
};
MODULE_DEVICE_TABLE(pci, s3_devices);
static struct pci_driver s3fb_pci_driver = {
.name = "s3fb",
.id_table = s3_devices,
.probe = s3_pci_probe,
.remove = __devexit_p(s3_pci_remove),
.suspend = s3_pci_suspend,
.resume = s3_pci_resume,
};
/* Parse user speficied options */
#ifndef MODULE
static int __init s3fb_setup(char *options)
{
char *opt;
if (!options || !*options)
return 0;
while ((opt = strsep(&options, ",")) != NULL) {
if (!*opt)
continue;
#ifdef CONFIG_MTRR
else if (!strncmp(opt, "mtrr:", 5))
mtrr = simple_strtoul(opt + 5, NULL, 0);
#endif
else if (!strncmp(opt, "fasttext:", 9))
fasttext = simple_strtoul(opt + 9, NULL, 0);
else
mode = opt;
}
return 0;
}
#endif
/* Cleanup */
static void __exit s3fb_cleanup(void)
{
pr_debug("s3fb: cleaning up\n");
pci_unregister_driver(&s3fb_pci_driver);
}
/* Driver Initialisation */
static int __init s3fb_init(void)
{
#ifndef MODULE
char *option = NULL;
if (fb_get_options("s3fb", &option))
return -ENODEV;
s3fb_setup(option);
#endif
pr_debug("s3fb: initializing\n");
return pci_register_driver(&s3fb_pci_driver);
}
/* ------------------------------------------------------------------------- */
/* Modularization */
module_init(s3fb_init);
module_exit(s3fb_cleanup);
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