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linux/drivers/video/vt8623fb.c
André Goddard Rosa af901ca181 tree-wide: fix assorted typos all over the place 
That is "success", "unknown", "through", "performance", "[re|un]mapping"
, "access", "default", "reasonable", "[con]currently", "temperature"
, "channel", "[un]used", "application", "example","hierarchy", "therefore"
, "[over|under]flow", "contiguous", "threshold", "enough" and others.

Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2009-12-04 15:39:55 +01:00

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/*
* linux/drivers/video/vt8623fb.c - fbdev driver for
* integrated graphic core in VIA VT8623 [CLE266] chipset
*
* 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 s3fb, some parts are from David Boucher's viafb
* (http://davesdomain.org.uk/viafb/)
*/
#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 vt8623fb_info {
char __iomem *mmio_base;
int mtrr_reg;
struct vgastate state;
struct mutex open_lock;
unsigned int ref_count;
u32 pseudo_palette[16];
};
/* ------------------------------------------------------------------------- */
static const struct svga_fb_format vt8623fb_formats[] = {
{ 0, {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0}, 0,
FB_TYPE_TEXT, FB_AUX_TEXT_SVGA_STEP8, FB_VISUAL_PSEUDOCOLOR, 16, 16},
{ 4, {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0}, 0,
FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_PSEUDOCOLOR, 16, 16},
{ 4, {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0}, 1,
FB_TYPE_INTERLEAVED_PLANES, 1, FB_VISUAL_PSEUDOCOLOR, 16, 16},
{ 8, {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0}, 0,
FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_PSEUDOCOLOR, 8, 8},
/* {16, {10, 5, 0}, {5, 5, 0}, {0, 5, 0}, {0, 0, 0}, 0,
FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_TRUECOLOR, 4, 4}, */
{16, {11, 5, 0}, {5, 6, 0}, {0, 5, 0}, {0, 0, 0}, 0,
FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_TRUECOLOR, 4, 4},
{32, {16, 8, 0}, {8, 8, 0}, {0, 8, 0}, {0, 0, 0}, 0,
FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_TRUECOLOR, 2, 2},
SVGA_FORMAT_END
};
static const struct svga_pll vt8623_pll = {2, 127, 2, 7, 0, 3,
60000, 300000, 14318};
/* CRT timing register sets */
static struct vga_regset vt8623_h_total_regs[] = {{0x00, 0, 7}, {0x36, 3, 3}, VGA_REGSET_END};
static struct vga_regset vt8623_h_display_regs[] = {{0x01, 0, 7}, VGA_REGSET_END};
static struct vga_regset vt8623_h_blank_start_regs[] = {{0x02, 0, 7}, VGA_REGSET_END};
static struct vga_regset vt8623_h_blank_end_regs[] = {{0x03, 0, 4}, {0x05, 7, 7}, {0x33, 5, 5}, VGA_REGSET_END};
static struct vga_regset vt8623_h_sync_start_regs[] = {{0x04, 0, 7}, {0x33, 4, 4}, VGA_REGSET_END};
static struct vga_regset vt8623_h_sync_end_regs[] = {{0x05, 0, 4}, VGA_REGSET_END};
static struct vga_regset vt8623_v_total_regs[] = {{0x06, 0, 7}, {0x07, 0, 0}, {0x07, 5, 5}, {0x35, 0, 0}, VGA_REGSET_END};
static struct vga_regset vt8623_v_display_regs[] = {{0x12, 0, 7}, {0x07, 1, 1}, {0x07, 6, 6}, {0x35, 2, 2}, VGA_REGSET_END};
static struct vga_regset vt8623_v_blank_start_regs[] = {{0x15, 0, 7}, {0x07, 3, 3}, {0x09, 5, 5}, {0x35, 3, 3}, VGA_REGSET_END};
static struct vga_regset vt8623_v_blank_end_regs[] = {{0x16, 0, 7}, VGA_REGSET_END};
static struct vga_regset vt8623_v_sync_start_regs[] = {{0x10, 0, 7}, {0x07, 2, 2}, {0x07, 7, 7}, {0x35, 1, 1}, VGA_REGSET_END};
static struct vga_regset vt8623_v_sync_end_regs[] = {{0x11, 0, 3}, VGA_REGSET_END};
static struct vga_regset vt8623_offset_regs[] = {{0x13, 0, 7}, {0x35, 5, 7}, VGA_REGSET_END};
static struct vga_regset vt8623_line_compare_regs[] = {{0x18, 0, 7}, {0x07, 4, 4}, {0x09, 6, 6}, {0x33, 0, 2}, {0x35, 4, 4}, VGA_REGSET_END};
static struct vga_regset vt8623_fetch_count_regs[] = {{0x1C, 0, 7}, {0x1D, 0, 1}, VGA_REGSET_END};
static struct vga_regset vt8623_start_address_regs[] = {{0x0d, 0, 7}, {0x0c, 0, 7}, {0x34, 0, 7}, {0x48, 0, 1}, VGA_REGSET_END};
static struct svga_timing_regs vt8623_timing_regs = {
vt8623_h_total_regs, vt8623_h_display_regs, vt8623_h_blank_start_regs,
vt8623_h_blank_end_regs, vt8623_h_sync_start_regs, vt8623_h_sync_end_regs,
vt8623_v_total_regs, vt8623_v_display_regs, vt8623_v_blank_start_regs,
vt8623_v_blank_end_regs, vt8623_v_sync_start_regs, vt8623_v_sync_end_regs,
};
/* ------------------------------------------------------------------------- */
/* Module parameters */
static char *mode_option = "640x480-8@60";
#ifdef CONFIG_MTRR
static int mtrr = 1;
#endif
MODULE_AUTHOR("(c) 2006 Ondrej Zajicek <santiago@crfreenet.org>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("fbdev driver for integrated graphics core in VIA VT8623 [CLE266]");
module_param(mode_option, charp, 0644);
MODULE_PARM_DESC(mode_option, "Default video mode ('640x480-8@60', etc)");
module_param_named(mode, mode_option, charp, 0);
MODULE_PARM_DESC(mode, "Default video mode e.g. '648x480-8@60' (deprecated)");
#ifdef CONFIG_MTRR
module_param(mtrr, int, 0444);
MODULE_PARM_DESC(mtrr, "Enable write-combining with MTRR (1=enable, 0=disable, default=1)");
#endif
/* ------------------------------------------------------------------------- */
static struct fb_tile_ops vt8623fb_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,
};
/* ------------------------------------------------------------------------- */
/* 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;
}
/* vt8623fb_iplan_imageblit silently assumes that almost everything is 8-pixel aligned */
static void vt8623fb_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;
}
}
/* vt8623fb_iplan_fillrect silently assumes that almost everything is 8-pixel aligned */
static void vt8623fb_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;
}
/* vt8623fb_cfb4_imageblit silently assumes that almost everything is 8-pixel aligned */
static void vt8623fb_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 vt8623fb_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)
vt8623fb_iplan_imageblit(info, image);
else
vt8623fb_cfb4_imageblit(info, image);
} else
cfb_imageblit(info, image);
}
static void vt8623fb_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))
vt8623fb_iplan_fillrect(info, rect);
else
cfb_fillrect(info, rect);
}
/* ------------------------------------------------------------------------- */
static void vt8623_set_pixclock(struct fb_info *info, u32 pixclock)
{
u16 m, n, r;
u8 regval;
int rv;
rv = svga_compute_pll(&vt8623_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 clock registers */
vga_wseq(NULL, 0x46, (n | (r << 6)));
vga_wseq(NULL, 0x47, m);
udelay(1000);
/* PLL reset */
svga_wseq_mask(0x40, 0x02, 0x02);
svga_wseq_mask(0x40, 0x00, 0x02);
}
static int vt8623fb_open(struct fb_info *info, int user)
{
struct vt8623fb_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 = 0xA2;
par->state.num_seq = 0x50;
save_vga(&(par->state));
}
par->ref_count++;
mutex_unlock(&(par->open_lock));
return 0;
}
static int vt8623fb_release(struct fb_info *info, int user)
{
struct vt8623fb_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;
}
static int vt8623fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
int rv, mem, step;
/* Find appropriate format */
rv = svga_match_format (vt8623fb_formats, var, NULL);
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 = vt8623fb_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;
}
/* Text mode is limited to 256 kB of memory */
if ((var->bits_per_pixel == 0) && (mem > (256*1024)))
{
printk(KERN_ERR "fb%d: text framebuffer size too large (%d kB requested, 256 kB possible)\n", info->node, mem >> 10);
return -EINVAL;
}
rv = svga_check_timings (&vt8623_timing_regs, var, info->node);
if (rv < 0)
{
printk(KERN_ERR "fb%d: invalid timings requested\n", info->node);
return rv;
}
/* Interlaced mode not supported */
if (var->vmode & FB_VMODE_INTERLACED)
return -EINVAL;
return 0;
}
static int vt8623fb_set_par(struct fb_info *info)
{
u32 mode, offset_value, fetch_value, screen_size;
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;
fetch_value = ((info->var.xres * bpp) / 128) + 4;
if (bpp == 4)
fetch_value = (info->var.xres / 8) + 8; /* + 0 is OK */
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 = &vt8623fb_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;
fetch_value = (info->var.xres / 8) + 8;
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 */
svga_wseq_mask(0x10, 0x01, 0x01);
svga_wcrt_mask(0x11, 0x00, 0x80);
svga_wcrt_mask(0x47, 0x00, 0x01);
/* Device, screen and sync off */
svga_wseq_mask(0x01, 0x20, 0x20);
svga_wcrt_mask(0x36, 0x30, 0x30);
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(vt8623_line_compare_regs, 0xFFFFFFFF);
svga_wcrt_multi(vt8623_start_address_regs, 0);
svga_wcrt_multi(vt8623_offset_regs, offset_value);
svga_wseq_multi(vt8623_fetch_count_regs, fetch_value);
/* Clear H/V Skew */
svga_wcrt_mask(0x03, 0x00, 0x60);
svga_wcrt_mask(0x05, 0x00, 0x60);
if (info->var.vmode & FB_VMODE_DOUBLE)
svga_wcrt_mask(0x09, 0x80, 0x80);
else
svga_wcrt_mask(0x09, 0x00, 0x80);
svga_wseq_mask(0x1E, 0xF0, 0xF0); // DI/DVP bus
svga_wseq_mask(0x2A, 0x0F, 0x0F); // DI/DVP bus
svga_wseq_mask(0x16, 0x08, 0xBF); // FIFO read threshold
vga_wseq(NULL, 0x17, 0x1F); // FIFO depth
vga_wseq(NULL, 0x18, 0x4E);
svga_wseq_mask(0x1A, 0x08, 0x08); // enable MMIO ?
vga_wcrt(NULL, 0x32, 0x00);
vga_wcrt(NULL, 0x34, 0x00);
vga_wcrt(NULL, 0x6A, 0x80);
vga_wcrt(NULL, 0x6A, 0xC0);
vga_wgfx(NULL, 0x20, 0x00);
vga_wgfx(NULL, 0x21, 0x00);
vga_wgfx(NULL, 0x22, 0x00);
/* Set SR15 according to number of bits per pixel */
mode = svga_match_format(vt8623fb_formats, &(info->var), &(info->fix));
switch (mode) {
case 0:
pr_debug("fb%d: text mode\n", info->node);
svga_set_textmode_vga_regs();
svga_wseq_mask(0x15, 0x00, 0xFE);
svga_wcrt_mask(0x11, 0x60, 0x70);
break;
case 1:
pr_debug("fb%d: 4 bit pseudocolor\n", info->node);
vga_wgfx(NULL, VGA_GFX_MODE, 0x40);
svga_wseq_mask(0x15, 0x20, 0xFE);
svga_wcrt_mask(0x11, 0x00, 0x70);
break;
case 2:
pr_debug("fb%d: 4 bit pseudocolor, planar\n", info->node);
svga_wseq_mask(0x15, 0x00, 0xFE);
svga_wcrt_mask(0x11, 0x00, 0x70);
break;
case 3:
pr_debug("fb%d: 8 bit pseudocolor\n", info->node);
svga_wseq_mask(0x15, 0x22, 0xFE);
break;
case 4:
pr_debug("fb%d: 5/6/5 truecolor\n", info->node);
svga_wseq_mask(0x15, 0xB6, 0xFE);
break;
case 5:
pr_debug("fb%d: 8/8/8 truecolor\n", info->node);
svga_wseq_mask(0x15, 0xAE, 0xFE);
break;
default:
printk(KERN_ERR "vt8623fb: unsupported mode - bug\n");
return (-EINVAL);
}
vt8623_set_pixclock(info, info->var.pixclock);
svga_set_timings(&vt8623_timing_regs, &(info->var), 1, 1,
(info->var.vmode & FB_VMODE_DOUBLE) ? 2 : 1, 1,
1, info->node);
memset_io(info->screen_base, 0x00, screen_size);
/* Device and screen back on */
svga_wcrt_mask(0x17, 0x80, 0x80);
svga_wcrt_mask(0x36, 0x00, 0x30);
svga_wseq_mask(0x01, 0x00, 0x20);
return 0;
}
static int vt8623fb_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;
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;
/* ((transp & 0xFF00) << 16) */
((u32*)fb->pseudo_palette)[regno] = ((red & 0xFF00) << 8) |
(green & 0xFF00) | ((blue & 0xFF00) >> 8);
break;
default:
return -EINVAL;
}
return 0;
}
static int vt8623fb_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(0x36, 0x00, 0x30);
svga_wseq_mask(0x01, 0x00, 0x20);
break;
case FB_BLANK_NORMAL:
pr_debug("fb%d: blank\n", info->node);
svga_wcrt_mask(0x36, 0x00, 0x30);
svga_wseq_mask(0x01, 0x20, 0x20);
break;
case FB_BLANK_HSYNC_SUSPEND:
pr_debug("fb%d: DPMS standby (hsync off)\n", info->node);
svga_wcrt_mask(0x36, 0x10, 0x30);
svga_wseq_mask(0x01, 0x20, 0x20);
break;
case FB_BLANK_VSYNC_SUSPEND:
pr_debug("fb%d: DPMS suspend (vsync off)\n", info->node);
svga_wcrt_mask(0x36, 0x20, 0x30);
svga_wseq_mask(0x01, 0x20, 0x20);
break;
case FB_BLANK_POWERDOWN:
pr_debug("fb%d: DPMS off (no sync)\n", info->node);
svga_wcrt_mask(0x36, 0x30, 0x30);
svga_wseq_mask(0x01, 0x20, 0x20);
break;
}
return 0;
}
static int vt8623fb_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 + var->xoffset;
offset = offset >> 3;
} else {
offset = (var->yoffset * info->fix.line_length) +
(var->xoffset * var->bits_per_pixel / 8);
offset = offset >> ((var->bits_per_pixel == 4) ? 2 : 1);
}
/* Set the offset */
svga_wcrt_multi(vt8623_start_address_regs, offset);
return 0;
}
/* ------------------------------------------------------------------------- */
/* Frame buffer operations */
static struct fb_ops vt8623fb_ops = {
.owner = THIS_MODULE,
.fb_open = vt8623fb_open,
.fb_release = vt8623fb_release,
.fb_check_var = vt8623fb_check_var,
.fb_set_par = vt8623fb_set_par,
.fb_setcolreg = vt8623fb_setcolreg,
.fb_blank = vt8623fb_blank,
.fb_pan_display = vt8623fb_pan_display,
.fb_fillrect = vt8623fb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = vt8623fb_imageblit,
.fb_get_caps = svga_get_caps,
};
/* PCI probe */
static int __devinit vt8623_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
{
struct fb_info *info;
struct vt8623fb_info *par;
unsigned int memsize1, memsize2;
int rc;
/* 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 vt8623fb_info), &(dev->dev));
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 = &vt8623fb_ops;
/* Prepare PCI device */
rc = pci_enable_device(dev);
if (rc < 0) {
dev_err(info->device, "cannot enable PCI device\n");
goto err_enable_device;
}
rc = pci_request_regions(dev, "vt8623fb");
if (rc < 0) {
dev_err(info->device, "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);
info->fix.mmio_start = pci_resource_start(dev, 1);
info->fix.mmio_len = pci_resource_len(dev, 1);
/* Map physical IO memory address into kernel space */
info->screen_base = pci_iomap(dev, 0, 0);
if (! info->screen_base) {
rc = -ENOMEM;
dev_err(info->device, "iomap for framebuffer failed\n");
goto err_iomap_1;
}
par->mmio_base = pci_iomap(dev, 1, 0);
if (! par->mmio_base) {
rc = -ENOMEM;
dev_err(info->device, "iomap for MMIO failed\n");
goto err_iomap_2;
}
/* Find how many physical memory there is on card */
memsize1 = (vga_rseq(NULL, 0x34) + 1) >> 1;
memsize2 = vga_rseq(NULL, 0x39) << 2;
if ((16 <= memsize1) && (memsize1 <= 64) && (memsize1 == memsize2))
info->screen_size = memsize1 << 20;
else {
dev_err(info->device, "memory size detection failed (%x %x), suppose 16 MB\n", memsize1, memsize2);
info->screen_size = 16 << 20;
}
info->fix.smem_len = info->screen_size;
strcpy(info->fix.id, "VIA VT8623");
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_option, NULL, 0, NULL, 8);
if (! ((rc == 1) || (rc == 2))) {
rc = -EINVAL;
dev_err(info->device, "mode %s not found\n", mode_option);
goto err_find_mode;
}
rc = fb_alloc_cmap(&info->cmap, 256, 0);
if (rc < 0) {
dev_err(info->device, "cannot allocate colormap\n");
goto err_alloc_cmap;
}
rc = register_framebuffer(info);
if (rc < 0) {
dev_err(info->device, "cannot register framebugger\n");
goto err_reg_fb;
}
printk(KERN_INFO "fb%d: %s on %s, %d MB RAM\n", info->node, info->fix.id,
pci_name(dev), info->fix.smem_len >> 20);
/* 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, par->mmio_base);
err_iomap_2:
pci_iounmap(dev, info->screen_base);
err_iomap_1:
pci_release_regions(dev);
err_request_regions:
/* pci_disable_device(dev); */
err_enable_device:
framebuffer_release(info);
return rc;
}
/* PCI remove */
static void __devexit vt8623_pci_remove(struct pci_dev *dev)
{
struct fb_info *info = pci_get_drvdata(dev);
if (info) {
struct vt8623fb_info *par = info->par;
#ifdef CONFIG_MTRR
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_iounmap(dev, par->mmio_base);
pci_release_regions(dev);
/* pci_disable_device(dev); */
pci_set_drvdata(dev, NULL);
framebuffer_release(info);
}
}
#ifdef CONFIG_PM
/* PCI suspend */
static int vt8623_pci_suspend(struct pci_dev* dev, pm_message_t state)
{
struct fb_info *info = pci_get_drvdata(dev);
struct vt8623fb_info *par = info->par;
dev_info(info->device, "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 vt8623_pci_resume(struct pci_dev* dev)
{
struct fb_info *info = pci_get_drvdata(dev);
struct vt8623fb_info *par = info->par;
dev_info(info->device, "resume\n");
acquire_console_sem();
mutex_lock(&(par->open_lock));
if (par->ref_count == 0)
goto fail;
pci_set_power_state(dev, PCI_D0);
pci_restore_state(dev);
if (pci_enable_device(dev))
goto fail;
pci_set_master(dev);
vt8623fb_set_par(info);
fb_set_suspend(info, 0);
fail:
mutex_unlock(&(par->open_lock));
release_console_sem();
return 0;
}
#else
#define vt8623_pci_suspend NULL
#define vt8623_pci_resume NULL
#endif /* CONFIG_PM */
/* List of boards that we are trying to support */
static struct pci_device_id vt8623_devices[] __devinitdata = {
{PCI_DEVICE(PCI_VENDOR_ID_VIA, 0x3122)},
{0, 0, 0, 0, 0, 0, 0}
};
MODULE_DEVICE_TABLE(pci, vt8623_devices);
static struct pci_driver vt8623fb_pci_driver = {
.name = "vt8623fb",
.id_table = vt8623_devices,
.probe = vt8623_pci_probe,
.remove = __devexit_p(vt8623_pci_remove),
.suspend = vt8623_pci_suspend,
.resume = vt8623_pci_resume,
};
/* Cleanup */
static void __exit vt8623fb_cleanup(void)
{
pr_debug("vt8623fb: cleaning up\n");
pci_unregister_driver(&vt8623fb_pci_driver);
}
/* Driver Initialisation */
static int __init vt8623fb_init(void)
{
#ifndef MODULE
char *option = NULL;
if (fb_get_options("vt8623fb", &option))
return -ENODEV;
if (option && *option)
mode_option = option;
#endif
pr_debug("vt8623fb: initializing\n");
return pci_register_driver(&vt8623fb_pci_driver);
}
/* ------------------------------------------------------------------------- */
/* Modularization */
module_init(vt8623fb_init);
module_exit(vt8623fb_cleanup);
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