linux/drivers/video/arkfb.c
Laurent Pinchart a35a9b79dd arkfb: use display information in info not in var for panning
We must not use any information in the passed var besides xoffset,
yoffset and vmode as otherwise applications might abuse it.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2011-08-19 10:29:44 +02:00

1232 lines
32 KiB
C

/*
* linux/drivers/video/arkfb.c -- Frame buffer device driver for ARK 2000PV
* with ICS 5342 dac (it is easy to add support for different dacs).
*
* Copyright (c) 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
*/
#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 console_lock() */
#include <video/vga.h>
#ifdef CONFIG_MTRR
#include <asm/mtrr.h>
#endif
struct arkfb_info {
int mclk_freq;
int mtrr_reg;
struct dac_info *dac;
struct vgastate state;
struct mutex open_lock;
unsigned int ref_count;
u32 pseudo_palette[16];
};
/* ------------------------------------------------------------------------- */
static const struct svga_fb_format arkfb_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, 8},
{ 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, 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},
{24, {16, 8, 0}, {8, 8, 0}, {0, 8, 0}, {0, 0, 0}, 0,
FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_TRUECOLOR, 8, 8},
{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
};
/* CRT timing register sets */
static const struct vga_regset ark_h_total_regs[] = {{0x00, 0, 7}, {0x41, 7, 7}, VGA_REGSET_END};
static const struct vga_regset ark_h_display_regs[] = {{0x01, 0, 7}, {0x41, 6, 6}, VGA_REGSET_END};
static const struct vga_regset ark_h_blank_start_regs[] = {{0x02, 0, 7}, {0x41, 5, 5}, VGA_REGSET_END};
static const struct vga_regset ark_h_blank_end_regs[] = {{0x03, 0, 4}, {0x05, 7, 7 }, VGA_REGSET_END};
static const struct vga_regset ark_h_sync_start_regs[] = {{0x04, 0, 7}, {0x41, 4, 4}, VGA_REGSET_END};
static const struct vga_regset ark_h_sync_end_regs[] = {{0x05, 0, 4}, VGA_REGSET_END};
static const struct vga_regset ark_v_total_regs[] = {{0x06, 0, 7}, {0x07, 0, 0}, {0x07, 5, 5}, {0x40, 7, 7}, VGA_REGSET_END};
static const struct vga_regset ark_v_display_regs[] = {{0x12, 0, 7}, {0x07, 1, 1}, {0x07, 6, 6}, {0x40, 6, 6}, VGA_REGSET_END};
static const struct vga_regset ark_v_blank_start_regs[] = {{0x15, 0, 7}, {0x07, 3, 3}, {0x09, 5, 5}, {0x40, 5, 5}, VGA_REGSET_END};
// const struct vga_regset ark_v_blank_end_regs[] = {{0x16, 0, 6}, VGA_REGSET_END};
static const struct vga_regset ark_v_blank_end_regs[] = {{0x16, 0, 7}, VGA_REGSET_END};
static const struct vga_regset ark_v_sync_start_regs[] = {{0x10, 0, 7}, {0x07, 2, 2}, {0x07, 7, 7}, {0x40, 4, 4}, VGA_REGSET_END};
static const struct vga_regset ark_v_sync_end_regs[] = {{0x11, 0, 3}, VGA_REGSET_END};
static const struct vga_regset ark_line_compare_regs[] = {{0x18, 0, 7}, {0x07, 4, 4}, {0x09, 6, 6}, VGA_REGSET_END};
static const struct vga_regset ark_start_address_regs[] = {{0x0d, 0, 7}, {0x0c, 0, 7}, {0x40, 0, 2}, VGA_REGSET_END};
static const struct vga_regset ark_offset_regs[] = {{0x13, 0, 7}, {0x41, 3, 3}, VGA_REGSET_END};
static const struct svga_timing_regs ark_timing_regs = {
ark_h_total_regs, ark_h_display_regs, ark_h_blank_start_regs,
ark_h_blank_end_regs, ark_h_sync_start_regs, ark_h_sync_end_regs,
ark_v_total_regs, ark_v_display_regs, ark_v_blank_start_regs,
ark_v_blank_end_regs, ark_v_sync_start_regs, ark_v_sync_end_regs,
};
/* ------------------------------------------------------------------------- */
/* Module parameters */
static char *mode_option __devinitdata = "640x480-8@60";
#ifdef CONFIG_MTRR
static int mtrr = 1;
#endif
MODULE_AUTHOR("(c) 2007 Ondrej Zajicek <santiago@crfreenet.org>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("fbdev driver for ARK 2000PV");
module_param(mode_option, charp, 0444);
MODULE_PARM_DESC(mode_option, "Default video mode ('640x480-8@60', etc)");
module_param_named(mode, mode_option, charp, 0444);
MODULE_PARM_DESC(mode, "Default video mode ('640x480-8@60', etc) (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 int threshold = 4;
module_param(threshold, int, 0644);
MODULE_PARM_DESC(threshold, "FIFO threshold");
/* ------------------------------------------------------------------------- */
static void arkfb_settile(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 (c = 0; c < map->length; c++) {
for (i = 0; i < map->height; i++) {
fb_writeb(font[i], &fb[i * 4]);
fb_writeb(font[i], &fb[i * 4 + (128 * 8)]);
}
fb += 128;
if ((c % 8) == 7)
fb += 128*8;
font += map->height;
}
}
static void arkfb_tilecursor(struct fb_info *info, struct fb_tilecursor *cursor)
{
struct arkfb_info *par = info->par;
svga_tilecursor(par->state.vgabase, info, cursor);
}
static struct fb_tile_ops arkfb_tile_ops = {
.fb_settile = arkfb_settile,
.fb_tilecopy = svga_tilecopy,
.fb_tilefill = svga_tilefill,
.fb_tileblit = svga_tileblit,
.fb_tilecursor = arkfb_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;
}
/* arkfb_iplan_imageblit silently assumes that almost everything is 8-pixel aligned */
static void arkfb_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;
}
}
/* arkfb_iplan_fillrect silently assumes that almost everything is 8-pixel aligned */
static void arkfb_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;
}
/* arkfb_cfb4_imageblit silently assumes that almost everything is 8-pixel aligned */
static void arkfb_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 arkfb_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)
arkfb_iplan_imageblit(info, image);
else
arkfb_cfb4_imageblit(info, image);
} else
cfb_imageblit(info, image);
}
static void arkfb_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))
arkfb_iplan_fillrect(info, rect);
else
cfb_fillrect(info, rect);
}
/* ------------------------------------------------------------------------- */
enum
{
DAC_PSEUDO8_8,
DAC_RGB1555_8,
DAC_RGB0565_8,
DAC_RGB0888_8,
DAC_RGB8888_8,
DAC_PSEUDO8_16,
DAC_RGB1555_16,
DAC_RGB0565_16,
DAC_RGB0888_16,
DAC_RGB8888_16,
DAC_MAX
};
struct dac_ops {
int (*dac_get_mode)(struct dac_info *info);
int (*dac_set_mode)(struct dac_info *info, int mode);
int (*dac_get_freq)(struct dac_info *info, int channel);
int (*dac_set_freq)(struct dac_info *info, int channel, u32 freq);
void (*dac_release)(struct dac_info *info);
};
typedef void (*dac_read_regs_t)(void *data, u8 *code, int count);
typedef void (*dac_write_regs_t)(void *data, u8 *code, int count);
struct dac_info
{
struct dac_ops *dacops;
dac_read_regs_t dac_read_regs;
dac_write_regs_t dac_write_regs;
void *data;
};
static inline u8 dac_read_reg(struct dac_info *info, u8 reg)
{
u8 code[2] = {reg, 0};
info->dac_read_regs(info->data, code, 1);
return code[1];
}
static inline void dac_read_regs(struct dac_info *info, u8 *code, int count)
{
info->dac_read_regs(info->data, code, count);
}
static inline void dac_write_reg(struct dac_info *info, u8 reg, u8 val)
{
u8 code[2] = {reg, val};
info->dac_write_regs(info->data, code, 1);
}
static inline void dac_write_regs(struct dac_info *info, u8 *code, int count)
{
info->dac_write_regs(info->data, code, count);
}
static inline int dac_set_mode(struct dac_info *info, int mode)
{
return info->dacops->dac_set_mode(info, mode);
}
static inline int dac_set_freq(struct dac_info *info, int channel, u32 freq)
{
return info->dacops->dac_set_freq(info, channel, freq);
}
static inline void dac_release(struct dac_info *info)
{
info->dacops->dac_release(info);
}
/* ------------------------------------------------------------------------- */
/* ICS5342 DAC */
struct ics5342_info
{
struct dac_info dac;
u8 mode;
};
#define DAC_PAR(info) ((struct ics5342_info *) info)
/* LSB is set to distinguish unused slots */
static const u8 ics5342_mode_table[DAC_MAX] = {
[DAC_PSEUDO8_8] = 0x01, [DAC_RGB1555_8] = 0x21, [DAC_RGB0565_8] = 0x61,
[DAC_RGB0888_8] = 0x41, [DAC_PSEUDO8_16] = 0x11, [DAC_RGB1555_16] = 0x31,
[DAC_RGB0565_16] = 0x51, [DAC_RGB0888_16] = 0x91, [DAC_RGB8888_16] = 0x71
};
static int ics5342_set_mode(struct dac_info *info, int mode)
{
u8 code;
if (mode >= DAC_MAX)
return -EINVAL;
code = ics5342_mode_table[mode];
if (! code)
return -EINVAL;
dac_write_reg(info, 6, code & 0xF0);
DAC_PAR(info)->mode = mode;
return 0;
}
static const struct svga_pll ics5342_pll = {3, 129, 3, 33, 0, 3,
60000, 250000, 14318};
/* pd4 - allow only posdivider 4 (r=2) */
static const struct svga_pll ics5342_pll_pd4 = {3, 129, 3, 33, 2, 2,
60000, 335000, 14318};
/* 270 MHz should be upper bound for VCO clock according to specs,
but that is too restrictive in pd4 case */
static int ics5342_set_freq(struct dac_info *info, int channel, u32 freq)
{
u16 m, n, r;
/* only postdivider 4 (r=2) is valid in mode DAC_PSEUDO8_16 */
int rv = svga_compute_pll((DAC_PAR(info)->mode == DAC_PSEUDO8_16)
? &ics5342_pll_pd4 : &ics5342_pll,
freq, &m, &n, &r, 0);
if (rv < 0) {
return -EINVAL;
} else {
u8 code[6] = {4, 3, 5, m-2, 5, (n-2) | (r << 5)};
dac_write_regs(info, code, 3);
return 0;
}
}
static void ics5342_release(struct dac_info *info)
{
ics5342_set_mode(info, DAC_PSEUDO8_8);
kfree(info);
}
static struct dac_ops ics5342_ops = {
.dac_set_mode = ics5342_set_mode,
.dac_set_freq = ics5342_set_freq,
.dac_release = ics5342_release
};
static struct dac_info * ics5342_init(dac_read_regs_t drr, dac_write_regs_t dwr, void *data)
{
struct dac_info *info = kzalloc(sizeof(struct ics5342_info), GFP_KERNEL);
if (! info)
return NULL;
info->dacops = &ics5342_ops;
info->dac_read_regs = drr;
info->dac_write_regs = dwr;
info->data = data;
DAC_PAR(info)->mode = DAC_PSEUDO8_8; /* estimation */
return info;
}
/* ------------------------------------------------------------------------- */
static unsigned short dac_regs[4] = {0x3c8, 0x3c9, 0x3c6, 0x3c7};
static void ark_dac_read_regs(void *data, u8 *code, int count)
{
struct fb_info *info = data;
struct arkfb_info *par;
u8 regval;
par = info->par;
regval = vga_rseq(par->state.vgabase, 0x1C);
while (count != 0)
{
vga_wseq(par->state.vgabase, 0x1C, regval | (code[0] & 4 ? 0x80 : 0));
code[1] = vga_r(par->state.vgabase, dac_regs[code[0] & 3]);
count--;
code += 2;
}
vga_wseq(par->state.vgabase, 0x1C, regval);
}
static void ark_dac_write_regs(void *data, u8 *code, int count)
{
struct fb_info *info = data;
struct arkfb_info *par;
u8 regval;
par = info->par;
regval = vga_rseq(par->state.vgabase, 0x1C);
while (count != 0)
{
vga_wseq(par->state.vgabase, 0x1C, regval | (code[0] & 4 ? 0x80 : 0));
vga_w(par->state.vgabase, dac_regs[code[0] & 3], code[1]);
count--;
code += 2;
}
vga_wseq(par->state.vgabase, 0x1C, regval);
}
static void ark_set_pixclock(struct fb_info *info, u32 pixclock)
{
struct arkfb_info *par = info->par;
u8 regval;
int rv = dac_set_freq(par->dac, 0, 1000000000 / pixclock);
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(par->state.vgabase, VGA_MIS_R);
vga_w(par->state.vgabase, VGA_MIS_W, regval | VGA_MIS_ENB_PLL_LOAD);
}
/* Open framebuffer */
static int arkfb_open(struct fb_info *info, int user)
{
struct arkfb_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 = 0x60;
par->state.num_seq = 0x30;
save_vga(&(par->state));
}
par->ref_count++;
mutex_unlock(&(par->open_lock));
return 0;
}
/* Close framebuffer */
static int arkfb_release(struct fb_info *info, int user)
{
struct arkfb_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));
dac_set_mode(par->dac, DAC_PSEUDO8_8);
}
par->ref_count--;
mutex_unlock(&(par->open_lock));
return 0;
}
/* Validate passed in var */
static int arkfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
int rv, mem, step;
/* Find appropriate format */
rv = svga_match_format (arkfb_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 = arkfb_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 (&ark_timing_regs, var, info->node);
if (rv < 0)
{
printk(KERN_ERR "fb%d: invalid timings requested\n", info->node);
return rv;
}
/* Interlaced mode is broken */
if (var->vmode & FB_VMODE_INTERLACED)
return -EINVAL;
return 0;
}
/* Set video mode from par */
static int arkfb_set_par(struct fb_info *info)
{
struct arkfb_info *par = info->par;
u32 value, mode, hmul, hdiv, offset_value, screen_size;
u32 bpp = info->var.bits_per_pixel;
u8 regval;
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 = &arkfb_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 */
svga_wcrt_mask(par->state.vgabase, 0x11, 0x00, 0x80);
/* Blank screen and turn off sync */
svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
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, ark_line_compare_regs, 0xFFFFFFFF);
svga_wcrt_multi(par->state.vgabase, ark_start_address_regs, 0);
/* ARK specific initialization */
svga_wseq_mask(par->state.vgabase, 0x10, 0x1F, 0x1F); /* enable linear framebuffer and full memory access */
svga_wseq_mask(par->state.vgabase, 0x12, 0x03, 0x03); /* 4 MB linear framebuffer size */
vga_wseq(par->state.vgabase, 0x13, info->fix.smem_start >> 16);
vga_wseq(par->state.vgabase, 0x14, info->fix.smem_start >> 24);
vga_wseq(par->state.vgabase, 0x15, 0);
vga_wseq(par->state.vgabase, 0x16, 0);
/* Set the FIFO threshold register */
/* It is fascinating way to store 5-bit value in 8-bit register */
regval = 0x10 | ((threshold & 0x0E) >> 1) | (threshold & 0x01) << 7 | (threshold & 0x10) << 1;
vga_wseq(par->state.vgabase, 0x18, regval);
/* Set the offset register */
pr_debug("fb%d: offset register : %d\n", info->node, offset_value);
svga_wcrt_multi(par->state.vgabase, ark_offset_regs, offset_value);
/* fix for hi-res textmode */
svga_wcrt_mask(par->state.vgabase, 0x40, 0x08, 0x08);
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);
if (info->var.vmode & FB_VMODE_INTERLACED)
svga_wcrt_mask(par->state.vgabase, 0x44, 0x04, 0x04);
else
svga_wcrt_mask(par->state.vgabase, 0x44, 0x00, 0x04);
hmul = 1;
hdiv = 1;
mode = svga_match_format(arkfb_formats, &(info->var), &(info->fix));
/* Set mode-specific register values */
switch (mode) {
case 0:
pr_debug("fb%d: text mode\n", info->node);
svga_set_textmode_vga_regs(par->state.vgabase);
vga_wseq(par->state.vgabase, 0x11, 0x10); /* basic VGA mode */
svga_wcrt_mask(par->state.vgabase, 0x46, 0x00, 0x04); /* 8bit pixel path */
dac_set_mode(par->dac, DAC_PSEUDO8_8);
break;
case 1:
pr_debug("fb%d: 4 bit pseudocolor\n", info->node);
vga_wgfx(par->state.vgabase, VGA_GFX_MODE, 0x40);
vga_wseq(par->state.vgabase, 0x11, 0x10); /* basic VGA mode */
svga_wcrt_mask(par->state.vgabase, 0x46, 0x00, 0x04); /* 8bit pixel path */
dac_set_mode(par->dac, DAC_PSEUDO8_8);
break;
case 2:
pr_debug("fb%d: 4 bit pseudocolor, planar\n", info->node);
vga_wseq(par->state.vgabase, 0x11, 0x10); /* basic VGA mode */
svga_wcrt_mask(par->state.vgabase, 0x46, 0x00, 0x04); /* 8bit pixel path */
dac_set_mode(par->dac, DAC_PSEUDO8_8);
break;
case 3:
pr_debug("fb%d: 8 bit pseudocolor\n", info->node);
vga_wseq(par->state.vgabase, 0x11, 0x16); /* 8bpp accel mode */
if (info->var.pixclock > 20000) {
pr_debug("fb%d: not using multiplex\n", info->node);
svga_wcrt_mask(par->state.vgabase, 0x46, 0x00, 0x04); /* 8bit pixel path */
dac_set_mode(par->dac, DAC_PSEUDO8_8);
} else {
pr_debug("fb%d: using multiplex\n", info->node);
svga_wcrt_mask(par->state.vgabase, 0x46, 0x04, 0x04); /* 16bit pixel path */
dac_set_mode(par->dac, DAC_PSEUDO8_16);
hdiv = 2;
}
break;
case 4:
pr_debug("fb%d: 5/5/5 truecolor\n", info->node);
vga_wseq(par->state.vgabase, 0x11, 0x1A); /* 16bpp accel mode */
svga_wcrt_mask(par->state.vgabase, 0x46, 0x04, 0x04); /* 16bit pixel path */
dac_set_mode(par->dac, DAC_RGB1555_16);
break;
case 5:
pr_debug("fb%d: 5/6/5 truecolor\n", info->node);
vga_wseq(par->state.vgabase, 0x11, 0x1A); /* 16bpp accel mode */
svga_wcrt_mask(par->state.vgabase, 0x46, 0x04, 0x04); /* 16bit pixel path */
dac_set_mode(par->dac, DAC_RGB0565_16);
break;
case 6:
pr_debug("fb%d: 8/8/8 truecolor\n", info->node);
vga_wseq(par->state.vgabase, 0x11, 0x16); /* 8bpp accel mode ??? */
svga_wcrt_mask(par->state.vgabase, 0x46, 0x04, 0x04); /* 16bit pixel path */
dac_set_mode(par->dac, DAC_RGB0888_16);
hmul = 3;
hdiv = 2;
break;
case 7:
pr_debug("fb%d: 8/8/8/8 truecolor\n", info->node);
vga_wseq(par->state.vgabase, 0x11, 0x1E); /* 32bpp accel mode */
svga_wcrt_mask(par->state.vgabase, 0x46, 0x04, 0x04); /* 16bit pixel path */
dac_set_mode(par->dac, DAC_RGB8888_16);
hmul = 2;
break;
default:
printk(KERN_ERR "fb%d: unsupported mode - bug\n", info->node);
return -EINVAL;
}
ark_set_pixclock(info, (hdiv * info->var.pixclock) / hmul);
svga_set_timings(par->state.vgabase, &ark_timing_regs, &(info->var), hmul, hdiv,
(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 / hdiv) / 8) - 5;
vga_wcrt(par->state.vgabase, 0x42, (value + 1) / 2);
memset_io(info->screen_base, 0x00, screen_size);
/* Device and screen back on */
svga_wcrt_mask(par->state.vgabase, 0x17, 0x80, 0x80);
svga_wseq_mask(par->state.vgabase, 0x01, 0x00, 0x20);
return 0;
}
/* Set a colour register */
static int arkfb_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 arkfb_blank(int blank_mode, struct fb_info *info)
{
struct arkfb_info *par = info->par;
switch (blank_mode) {
case FB_BLANK_UNBLANK:
pr_debug("fb%d: unblank\n", info->node);
svga_wseq_mask(par->state.vgabase, 0x01, 0x00, 0x20);
svga_wcrt_mask(par->state.vgabase, 0x17, 0x80, 0x80);
break;
case FB_BLANK_NORMAL:
pr_debug("fb%d: blank\n", info->node);
svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
svga_wcrt_mask(par->state.vgabase, 0x17, 0x80, 0x80);
break;
case FB_BLANK_POWERDOWN:
case FB_BLANK_HSYNC_SUSPEND:
case FB_BLANK_VSYNC_SUSPEND:
pr_debug("fb%d: sync down\n", info->node);
svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
svga_wcrt_mask(par->state.vgabase, 0x17, 0x00, 0x80);
break;
}
return 0;
}
/* Pan the display */
static int arkfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
{
struct arkfb_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 / 2)
+ (var->xoffset / 2);
offset = offset >> 2;
} 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 : 3);
}
/* Set the offset */
svga_wcrt_multi(par->state.vgabase, ark_start_address_regs, offset);
return 0;
}
/* ------------------------------------------------------------------------- */
/* Frame buffer operations */
static struct fb_ops arkfb_ops = {
.owner = THIS_MODULE,
.fb_open = arkfb_open,
.fb_release = arkfb_release,
.fb_check_var = arkfb_check_var,
.fb_set_par = arkfb_set_par,
.fb_setcolreg = arkfb_setcolreg,
.fb_blank = arkfb_blank,
.fb_pan_display = arkfb_pan_display,
.fb_fillrect = arkfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = arkfb_imageblit,
.fb_get_caps = svga_get_caps,
};
/* ------------------------------------------------------------------------- */
/* PCI probe */
static int __devinit ark_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 arkfb_info *par;
int rc;
u8 regval;
/* 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 arkfb_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 = &arkfb_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, "arkfb");
if (rc < 0) {
dev_err(info->device, "cannot reserve framebuffer region\n");
goto err_request_regions;
}
par->dac = ics5342_init(ark_dac_read_regs, ark_dac_write_regs, info);
if (! par->dac) {
rc = -ENOMEM;
dev_err(info->device, "RAMDAC initialization failed\n");
goto err_dac;
}
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(info->device, "iomap for framebuffer failed\n");
goto err_iomap;
}
bus_reg.start = 0;
bus_reg.end = 64 * 1024;
vga_res.flags = IORESOURCE_IO;
pcibios_bus_to_resource(dev, &vga_res, &bus_reg);
par->state.vgabase = (void __iomem *) vga_res.start;
/* FIXME get memsize */
regval = vga_rseq(par->state.vgabase, 0x10);
info->screen_size = (1 << (regval >> 6)) << 20;
info->fix.smem_len = info->screen_size;
strcpy(info->fix.id, "ARK 2000PV");
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_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, info->screen_base);
err_iomap:
dac_release(par->dac);
err_dac:
pci_release_regions(dev);
err_request_regions:
/* pci_disable_device(dev); */
err_enable_device:
framebuffer_release(info);
return rc;
}
/* PCI remove */
static void __devexit ark_pci_remove(struct pci_dev *dev)
{
struct fb_info *info = pci_get_drvdata(dev);
if (info) {
struct arkfb_info *par = info->par;
#ifdef CONFIG_MTRR
if (par->mtrr_reg >= 0) {
mtrr_del(par->mtrr_reg, 0, 0);
par->mtrr_reg = -1;
}
#endif
dac_release(par->dac);
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);
}
}
#ifdef CONFIG_PM
/* PCI suspend */
static int ark_pci_suspend (struct pci_dev* dev, pm_message_t state)
{
struct fb_info *info = pci_get_drvdata(dev);
struct arkfb_info *par = info->par;
dev_info(info->device, "suspend\n");
console_lock();
mutex_lock(&(par->open_lock));
if ((state.event == PM_EVENT_FREEZE) || (par->ref_count == 0)) {
mutex_unlock(&(par->open_lock));
console_unlock();
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));
console_unlock();
return 0;
}
/* PCI resume */
static int ark_pci_resume (struct pci_dev* dev)
{
struct fb_info *info = pci_get_drvdata(dev);
struct arkfb_info *par = info->par;
dev_info(info->device, "resume\n");
console_lock();
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);
arkfb_set_par(info);
fb_set_suspend(info, 0);
fail:
mutex_unlock(&(par->open_lock));
console_unlock();
return 0;
}
#else
#define ark_pci_suspend NULL
#define ark_pci_resume NULL
#endif /* CONFIG_PM */
/* List of boards that we are trying to support */
static struct pci_device_id ark_devices[] __devinitdata = {
{PCI_DEVICE(0xEDD8, 0xA099)},
{0, 0, 0, 0, 0, 0, 0}
};
MODULE_DEVICE_TABLE(pci, ark_devices);
static struct pci_driver arkfb_pci_driver = {
.name = "arkfb",
.id_table = ark_devices,
.probe = ark_pci_probe,
.remove = __devexit_p(ark_pci_remove),
.suspend = ark_pci_suspend,
.resume = ark_pci_resume,
};
/* Cleanup */
static void __exit arkfb_cleanup(void)
{
pr_debug("arkfb: cleaning up\n");
pci_unregister_driver(&arkfb_pci_driver);
}
/* Driver Initialisation */
static int __init arkfb_init(void)
{
#ifndef MODULE
char *option = NULL;
if (fb_get_options("arkfb", &option))
return -ENODEV;
if (option && *option)
mode_option = option;
#endif
pr_debug("arkfb: initializing\n");
return pci_register_driver(&arkfb_pci_driver);
}
module_init(arkfb_init);
module_exit(arkfb_cleanup);