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arkfb.c
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arkfb.c
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/*
* 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;
}