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linux/drivers/video/fbdev/vt8623fb.c
Thomas Zimmermann 0ba2fa8cbd fbdev: Add support for the nomodeset kernel parameter 
Support the kernel's nomodeset parameter for all PCI-based fbdev
drivers that use aperture helpers to remove other, hardware-agnostic
graphics drivers.

The parameter is a simple way of using the firmware-provided scanout
buffer if the hardware's native driver is broken. The same effect
could be achieved with per-driver options, but the importance of the
graphics output for many users makes a single, unified approach
worthwhile.

With nomodeset specified, the fbdev driver module will not load. This
unifies behavior with similar DRM drivers. In DRM helpers, modules
first check the nomodeset parameter before registering the PCI
driver. As fbdev has no such module helpers, we have to modify each
driver individually.

The name 'nomodeset' is slightly misleading, but has been chosen for
historical reasons. Several drivers implemented it before it became a
general option for DRM. So keeping the existing name was preferred over
introducing a new one.

v2:
	* print a warning if a driver does not init (Helge)
	* wrap video_firmware_drivers_only() in helper

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221111133024.9897-3-tzimmermann@suse.de
2022-11-16 13:26:25 +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/aperture.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/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 console_lock() */
#include <video/vga.h>
struct vt8623fb_info {
char __iomem *mmio_base;
int wc_cookie;
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 const struct vga_regset vt8623_h_total_regs[] = {{0x00, 0, 7}, {0x36, 3, 3}, VGA_REGSET_END};
static const struct vga_regset vt8623_h_display_regs[] = {{0x01, 0, 7}, VGA_REGSET_END};
static const struct vga_regset vt8623_h_blank_start_regs[] = {{0x02, 0, 7}, VGA_REGSET_END};
static const struct vga_regset vt8623_h_blank_end_regs[] = {{0x03, 0, 4}, {0x05, 7, 7}, {0x33, 5, 5}, VGA_REGSET_END};
static const struct vga_regset vt8623_h_sync_start_regs[] = {{0x04, 0, 7}, {0x33, 4, 4}, VGA_REGSET_END};
static const struct vga_regset vt8623_h_sync_end_regs[] = {{0x05, 0, 4}, VGA_REGSET_END};
static const struct vga_regset vt8623_v_total_regs[] = {{0x06, 0, 7}, {0x07, 0, 0}, {0x07, 5, 5}, {0x35, 0, 0}, VGA_REGSET_END};
static const struct vga_regset vt8623_v_display_regs[] = {{0x12, 0, 7}, {0x07, 1, 1}, {0x07, 6, 6}, {0x35, 2, 2}, VGA_REGSET_END};
static const struct vga_regset vt8623_v_blank_start_regs[] = {{0x15, 0, 7}, {0x07, 3, 3}, {0x09, 5, 5}, {0x35, 3, 3}, VGA_REGSET_END};
static const struct vga_regset vt8623_v_blank_end_regs[] = {{0x16, 0, 7}, VGA_REGSET_END};
static const struct vga_regset vt8623_v_sync_start_regs[] = {{0x10, 0, 7}, {0x07, 2, 2}, {0x07, 7, 7}, {0x35, 1, 1}, VGA_REGSET_END};
static const struct vga_regset vt8623_v_sync_end_regs[] = {{0x11, 0, 3}, VGA_REGSET_END};
static const struct vga_regset vt8623_offset_regs[] = {{0x13, 0, 7}, {0x35, 5, 7}, VGA_REGSET_END};
static const 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 const struct vga_regset vt8623_fetch_count_regs[] = {{0x1C, 0, 7}, {0x1D, 0, 1}, VGA_REGSET_END};
static const struct vga_regset vt8623_start_address_regs[] = {{0x0d, 0, 7}, {0x0c, 0, 7}, {0x34, 0, 7}, {0x48, 0, 1}, VGA_REGSET_END};
static const 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";
static int mtrr = 1;
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)");
module_param(mtrr, int, 0444);
MODULE_PARM_DESC(mtrr, "Enable write-combining with MTRR (1=enable, 0=disable, default=1)");
/* ------------------------------------------------------------------------- */
static void vt8623fb_tilecursor(struct fb_info *info, struct fb_tilecursor *cursor)
{
struct vt8623fb_info *par = info->par;
svga_tilecursor(par->state.vgabase, info, cursor);
}
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 = vt8623fb_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)
{
struct vt8623fb_info *par = info->par;
u16 m, n, r;
u8 regval;
int rv;
rv = svga_compute_pll(&vt8623_pll, 1000000000 / pixclock, &m, &n, &r, info->node);
if (rv < 0) {
fb_err(info, "cannot set requested pixclock, keeping old value\n");
return;
}
/* Set VGA misc register */
regval = vga_r(par->state.vgabase, VGA_MIS_R);
vga_w(par->state.vgabase, VGA_MIS_W, regval | VGA_MIS_ENB_PLL_LOAD);
/* Set clock registers */
vga_wseq(par->state.vgabase, 0x46, (n | (r << 6)));
vga_wseq(par->state.vgabase, 0x47, m);
udelay(1000);
/* PLL reset */
svga_wseq_mask(par->state.vgabase, 0x40, 0x02, 0x02);
svga_wseq_mask(par->state.vgabase, 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) {
void __iomem *vgabase = par->state.vgabase;
memset(&(par->state), 0, sizeof(struct vgastate));
par->state.vgabase = vgabase;
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;
if (!var->pixclock)
return -EINVAL;
/* Find appropriate format */
rv = svga_match_format (vt8623fb_formats, var, NULL);
if (rv < 0)
{
fb_err(info, "unsupported mode requested\n");
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)
{
fb_err(info, "not enough framebuffer memory (%d kB requested, %d kB available)\n",
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)))
{
fb_err(info, "text framebuffer size too large (%d kB requested, 256 kB possible)\n",
mem >> 10);
return -EINVAL;
}
rv = svga_check_timings (&vt8623_timing_regs, var, info->node);
if (rv < 0)
{
fb_err(info, "invalid timings requested\n");
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;
struct vt8623fb_info *par = info->par;
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(par->state.vgabase, 0x10, 0x01, 0x01);
svga_wcrt_mask(par->state.vgabase, 0x11, 0x00, 0x80);
svga_wcrt_mask(par->state.vgabase, 0x47, 0x00, 0x01);
/* Device, screen and sync off */
svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
svga_wcrt_mask(par->state.vgabase, 0x36, 0x30, 0x30);
svga_wcrt_mask(par->state.vgabase, 0x17, 0x00, 0x80);
/* Set default values */
svga_set_default_gfx_regs(par->state.vgabase);
svga_set_default_atc_regs(par->state.vgabase);
svga_set_default_seq_regs(par->state.vgabase);
svga_set_default_crt_regs(par->state.vgabase);
svga_wcrt_multi(par->state.vgabase, vt8623_line_compare_regs, 0xFFFFFFFF);
svga_wcrt_multi(par->state.vgabase, vt8623_start_address_regs, 0);
svga_wcrt_multi(par->state.vgabase, vt8623_offset_regs, offset_value);
svga_wseq_multi(par->state.vgabase, vt8623_fetch_count_regs, fetch_value);
/* Clear H/V Skew */
svga_wcrt_mask(par->state.vgabase, 0x03, 0x00, 0x60);
svga_wcrt_mask(par->state.vgabase, 0x05, 0x00, 0x60);
if (info->var.vmode & FB_VMODE_DOUBLE)
svga_wcrt_mask(par->state.vgabase, 0x09, 0x80, 0x80);
else
svga_wcrt_mask(par->state.vgabase, 0x09, 0x00, 0x80);
svga_wseq_mask(par->state.vgabase, 0x1E, 0xF0, 0xF0); // DI/DVP bus
svga_wseq_mask(par->state.vgabase, 0x2A, 0x0F, 0x0F); // DI/DVP bus
svga_wseq_mask(par->state.vgabase, 0x16, 0x08, 0xBF); // FIFO read threshold
vga_wseq(par->state.vgabase, 0x17, 0x1F); // FIFO depth
vga_wseq(par->state.vgabase, 0x18, 0x4E);
svga_wseq_mask(par->state.vgabase, 0x1A, 0x08, 0x08); // enable MMIO ?
vga_wcrt(par->state.vgabase, 0x32, 0x00);
vga_wcrt(par->state.vgabase, 0x34, 0x00);
vga_wcrt(par->state.vgabase, 0x6A, 0x80);
vga_wcrt(par->state.vgabase, 0x6A, 0xC0);
vga_wgfx(par->state.vgabase, 0x20, 0x00);
vga_wgfx(par->state.vgabase, 0x21, 0x00);
vga_wgfx(par->state.vgabase, 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:
fb_dbg(info, "text mode\n");
svga_set_textmode_vga_regs(par->state.vgabase);
svga_wseq_mask(par->state.vgabase, 0x15, 0x00, 0xFE);
svga_wcrt_mask(par->state.vgabase, 0x11, 0x60, 0x70);
break;
case 1:
fb_dbg(info, "4 bit pseudocolor\n");
vga_wgfx(par->state.vgabase, VGA_GFX_MODE, 0x40);
svga_wseq_mask(par->state.vgabase, 0x15, 0x20, 0xFE);
svga_wcrt_mask(par->state.vgabase, 0x11, 0x00, 0x70);
break;
case 2:
fb_dbg(info, "4 bit pseudocolor, planar\n");
svga_wseq_mask(par->state.vgabase, 0x15, 0x00, 0xFE);
svga_wcrt_mask(par->state.vgabase, 0x11, 0x00, 0x70);
break;
case 3:
fb_dbg(info, "8 bit pseudocolor\n");
svga_wseq_mask(par->state.vgabase, 0x15, 0x22, 0xFE);
break;
case 4:
fb_dbg(info, "5/6/5 truecolor\n");
svga_wseq_mask(par->state.vgabase, 0x15, 0xB6, 0xFE);
break;
case 5:
fb_dbg(info, "8/8/8 truecolor\n");
svga_wseq_mask(par->state.vgabase, 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(par->state.vgabase, &vt8623_timing_regs, &(info->var), 1, 1,
(info->var.vmode & FB_VMODE_DOUBLE) ? 2 : 1, 1,
1, info->node);
if (screen_size > info->screen_size)
screen_size = info->screen_size;
memset_io(info->screen_base, 0x00, screen_size);
/* Device and screen back on */
svga_wcrt_mask(par->state.vgabase, 0x17, 0x80, 0x80);
svga_wcrt_mask(par->state.vgabase, 0x36, 0x00, 0x30);
svga_wseq_mask(par->state.vgabase, 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)
{
struct vt8623fb_info *par = info->par;
switch (blank_mode) {
case FB_BLANK_UNBLANK:
fb_dbg(info, "unblank\n");
svga_wcrt_mask(par->state.vgabase, 0x36, 0x00, 0x30);
svga_wseq_mask(par->state.vgabase, 0x01, 0x00, 0x20);
break;
case FB_BLANK_NORMAL:
fb_dbg(info, "blank\n");
svga_wcrt_mask(par->state.vgabase, 0x36, 0x00, 0x30);
svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
break;
case FB_BLANK_HSYNC_SUSPEND:
fb_dbg(info, "DPMS standby (hsync off)\n");
svga_wcrt_mask(par->state.vgabase, 0x36, 0x10, 0x30);
svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
break;
case FB_BLANK_VSYNC_SUSPEND:
fb_dbg(info, "DPMS suspend (vsync off)\n");
svga_wcrt_mask(par->state.vgabase, 0x36, 0x20, 0x30);
svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
break;
case FB_BLANK_POWERDOWN:
fb_dbg(info, "DPMS off (no sync)\n");
svga_wcrt_mask(par->state.vgabase, 0x36, 0x30, 0x30);
svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
break;
}
return 0;
}
static int vt8623fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
{
struct vt8623fb_info *par = info->par;
unsigned int offset;
/* Calculate the offset */
if (info->var.bits_per_pixel == 0) {
offset = (var->yoffset / 16) * info->var.xres_virtual
+ var->xoffset;
offset = offset >> 3;
} else {
offset = (var->yoffset * info->fix.line_length) +
(var->xoffset * info->var.bits_per_pixel / 8);
offset = offset >> ((info->var.bits_per_pixel == 4) ? 2 : 1);
}
/* Set the offset */
svga_wcrt_multi(par->state.vgabase, vt8623_start_address_regs, offset);
return 0;
}
/* ------------------------------------------------------------------------- */
/* Frame buffer operations */
static const 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 vt8623_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
{
struct pci_bus_region bus_reg;
struct resource vga_res;
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;
}
rc = aperture_remove_conflicting_pci_devices(dev, "vt8623fb");
if (rc)
return rc;
/* Allocate and fill driver data structure */
info = framebuffer_alloc(sizeof(struct vt8623fb_info), &(dev->dev));
if (!info)
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_wc(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;
}
bus_reg.start = 0;
bus_reg.end = 64 * 1024;
vga_res.flags = IORESOURCE_IO;
pcibios_bus_to_resource(dev->bus, &vga_res, &bus_reg);
par->state.vgabase = (void __iomem *) (unsigned long) vga_res.start;
/* Find how many physical memory there is on card */
memsize1 = (vga_rseq(par->state.vgabase, 0x34) + 1) >> 1;
memsize2 = vga_rseq(par->state.vgabase, 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 */
kernel_param_lock(THIS_MODULE);
rc = fb_find_mode(&(info->var), info, mode_option, NULL, 0, NULL, 8);
kernel_param_unlock(THIS_MODULE);
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 framebuffer\n");
goto err_reg_fb;
}
fb_info(info, "%s on %s, %d MB RAM\n",
info->fix.id, pci_name(dev), info->fix.smem_len >> 20);
/* Record a reference to the driver data */
pci_set_drvdata(dev, info);
if (mtrr)
par->wc_cookie = arch_phys_wc_add(info->fix.smem_start,
info->fix.smem_len);
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 vt8623_pci_remove(struct pci_dev *dev)
{
struct fb_info *info = pci_get_drvdata(dev);
if (info) {
struct vt8623fb_info *par = info->par;
arch_phys_wc_del(par->wc_cookie);
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); */
framebuffer_release(info);
}
}
/* PCI suspend */
static int __maybe_unused vt8623_pci_suspend(struct device *dev)
{
struct fb_info *info = dev_get_drvdata(dev);
struct vt8623fb_info *par = info->par;
dev_info(info->device, "suspend\n");
console_lock();
mutex_lock(&(par->open_lock));
if (par->ref_count == 0) {
mutex_unlock(&(par->open_lock));
console_unlock();
return 0;
}
fb_set_suspend(info, 1);
mutex_unlock(&(par->open_lock));
console_unlock();
return 0;
}
/* PCI resume */
static int __maybe_unused vt8623_pci_resume(struct device *dev)
{
struct fb_info *info = dev_get_drvdata(dev);
struct vt8623fb_info *par = info->par;
dev_info(info->device, "resume\n");
console_lock();
mutex_lock(&(par->open_lock));
if (par->ref_count == 0)
goto fail;
vt8623fb_set_par(info);
fb_set_suspend(info, 0);
fail:
mutex_unlock(&(par->open_lock));
console_unlock();
return 0;
}
static const struct dev_pm_ops vt8623_pci_pm_ops = {
#ifdef CONFIG_PM_SLEEP
.suspend = vt8623_pci_suspend,
.resume = vt8623_pci_resume,
.freeze = NULL,
.thaw = vt8623_pci_resume,
.poweroff = vt8623_pci_suspend,
.restore = vt8623_pci_resume,
#endif /* CONFIG_PM_SLEEP */
};
/* List of boards that we are trying to support */
static const struct pci_device_id vt8623_devices[] = {
{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 = vt8623_pci_remove,
.driver.pm = &vt8623_pci_pm_ops,
};
/* 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;
#endif
if (fb_modesetting_disabled("vt8623fb"))
return -ENODEV;
#ifndef MODULE
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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