WebSVN - shark - Rev 489 - /shark/branches/xen/drivers/fb/matrox/matroxfb

/*
*
* Hardware accelerated Matrox Millennium I, II, Mystique, G100, G200, G400 and G450.
*
* (c) 1998-2002 Petr Vandrovec <vandrove@vc.cvut.cz>
*
* Portions Copyright (c) 2001 Matrox Graphics Inc.
*
* Version: 1.65 2002/08/14
*
*/

#include <linuxcomp.h>

#include "matroxfb_maven.h"
#include "matroxfb_crtc2.h"
#include "matroxfb_misc.h"
#include "matroxfb_DAC1064.h"
#include <linux/matroxfb.h>
#include <asm/uaccess.h>

/* **************************************************** */

static int mem = 8192;

MODULE_PARM(mem, "i");
MODULE_PARM_DESC(mem, "Memory size reserved for dualhead (default=8MB)");

/* **************************************************** */

static int matroxfb_dh_setcolreg(unsigned regno, unsigned red, unsigned green,
unsigned blue, unsigned transp, struct fb_info* info) {
u_int32_t col;
#define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))

if (regno >= 16)
return 1;
if (m2info->fbcon.var.grayscale) {
/* gray = 0.30*R + 0.59*G + 0.11*B */
red = green = blue = (red * 77 + green * 151 + blue * 28) >> 8;
}
red = CNVT_TOHW(red, m2info->fbcon.var.red.length);
green = CNVT_TOHW(green, m2info->fbcon.var.green.length);
blue = CNVT_TOHW(blue, m2info->fbcon.var.blue.length);
transp = CNVT_TOHW(transp, m2info->fbcon.var.transp.length);

col = (red << m2info->fbcon.var.red.offset) |
(green << m2info->fbcon.var.green.offset) |
(blue << m2info->fbcon.var.blue.offset) |
(transp << m2info->fbcon.var.transp.offset);

switch (m2info->fbcon.var.bits_per_pixel) {
case 16:
m2info->cmap[regno] = col | (col << 16);
break;
case 32:
m2info->cmap[regno] = col;
break;
}
return 0;
#undef m2info
}

static void matroxfb_dh_restore(struct matroxfb_dh_fb_info* m2info,
struct my_timming* mt,
int mode,
unsigned int pos) {
u_int32_t tmp;
u_int32_t datactl;
MINFO_FROM(m2info->primary_dev);

switch (mode) {
case 15:
tmp = 0x00200000;
break;
case 16:
tmp = 0x00400000;
break;
/* case 32: */
default:
tmp = 0x00800000;
break;
}
tmp |= 0x00000001; /* enable CRTC2 */
datactl = 0;
if (ACCESS_FBINFO(outputs[1]).src == MATROXFB_SRC_CRTC2) {
if (ACCESS_FBINFO(devflags.g450dac)) {
tmp |= 0x00000006; /* source from secondary pixel PLL */
/* no vidrst when in monitor mode */
if (ACCESS_FBINFO(outputs[1]).mode != MATROXFB_OUTPUT_MODE_MONITOR) {
tmp |= 0xC0001000; /* Enable H/V vidrst */
}
} else {
tmp |= 0x00000002; /* source from VDOCLK */
tmp |= 0xC0000000; /* enable vvidrst & hvidrst */
/* MGA TVO is our clock source */
}
} else if (ACCESS_FBINFO(outputs[0]).src == MATROXFB_SRC_CRTC2) {
tmp |= 0x00000004; /* source from pixclock */
/* PIXPLL is our clock source */
}
if (ACCESS_FBINFO(outputs[0]).src == MATROXFB_SRC_CRTC2) {
tmp |= 0x00100000; /* connect CRTC2 to DAC */
}
if (mt->interlaced) {
tmp |= 0x02000000; /* interlaced, second field is bigger, as G450 apparently ignores it */
mt->VDisplay >>= 1;
mt->VSyncStart >>= 1;
mt->VSyncEnd >>= 1;
mt->VTotal >>= 1;
}
if ((mt->HTotal & 7) == 2) {
datactl |= 0x00000010;
mt->HTotal &= ~7;
}
tmp |= 0x10000000; /* 0x10000000 is VIDRST polarity */
mga_outl(0x3C14, ((mt->HDisplay - 8) << 16) | (mt->HTotal - 8));
mga_outl(0x3C18, ((mt->HSyncEnd - 8) << 16) | (mt->HSyncStart - 8));
mga_outl(0x3C1C, ((mt->VDisplay - 1) << 16) | (mt->VTotal - 1));
mga_outl(0x3C20, ((mt->VSyncEnd - 1) << 16) | (mt->VSyncStart - 1));
mga_outl(0x3C24, ((mt->VSyncStart) << 16) | (mt->HSyncStart)); /* preload */
{
u_int32_t linelen = m2info->fbcon.var.xres_virtual * (m2info->fbcon.var.bits_per_pixel >> 3);
if (tmp & 0x02000000) {
/* field #0 is smaller, so... */
mga_outl(0x3C2C, pos); /* field #1 vmemory start */
mga_outl(0x3C28, pos + linelen); /* field #0 vmemory start */
linelen <<= 1;
m2info->interlaced = 1;
} else {
mga_outl(0x3C28, pos); /* vmemory start */
m2info->interlaced = 0;
}
mga_outl(0x3C40, linelen);
}
mga_outl(0x3C4C, datactl); /* data control */
if (tmp & 0x02000000) {
int i;

mga_outl(0x3C10, tmp & ~0x02000000);
for (i = 0; i < 2; i++) {
unsigned int nl;
unsigned int lastl = 0;

while ((nl = mga_inl(0x3C48) & 0xFFF) >= lastl) {
lastl = nl;
}
}
}
mga_outl(0x3C10, tmp);
ACCESS_FBINFO(hw).crtc2.ctl = tmp;

tmp = mt->VDisplay << 16; /* line compare */
if (mt->sync & FB_SYNC_HOR_HIGH_ACT)
tmp |= 0x00000100;
if (mt->sync & FB_SYNC_VERT_HIGH_ACT)
tmp |= 0x00000200;
mga_outl(0x3C44, tmp);
}

static void matroxfb_dh_disable(struct matroxfb_dh_fb_info* m2info) {
MINFO_FROM(m2info->primary_dev);

mga_outl(0x3C10, 0x00000004); /* disable CRTC2, CRTC1->DAC1, PLL as clock source */
ACCESS_FBINFO(hw).crtc2.ctl = 0x00000004;
}

static void matroxfb_dh_cfbX_init(struct matroxfb_dh_fb_info* m2info) {
/* no acceleration for secondary head... */
m2info->cmap[16] = 0xFFFFFFFF;
}

static void matroxfb_dh_pan_var(struct matroxfb_dh_fb_info* m2info,
struct fb_var_screeninfo* var) {
unsigned int pos;
unsigned int linelen;
unsigned int pixelsize;
MINFO_FROM(m2info->primary_dev);

m2info->fbcon.var.xoffset = var->xoffset;
m2info->fbcon.var.yoffset = var->yoffset;
pixelsize = m2info->fbcon.var.bits_per_pixel >> 3;
linelen = m2info->fbcon.var.xres_virtual * pixelsize;
pos = m2info->fbcon.var.yoffset * linelen + m2info->fbcon.var.xoffset * pixelsize;
pos += m2info->video.offbase;
if (m2info->interlaced) {
mga_outl(0x3C2C, pos);
mga_outl(0x3C28, pos + linelen);
} else {
mga_outl(0x3C28, pos);
}
}

static int matroxfb_dh_decode_var(struct matroxfb_dh_fb_info* m2info,
struct fb_var_screeninfo* var,
int *visual,
int *video_cmap_len,
int *mode) {
unsigned int mask;
unsigned int memlen;
unsigned int vramlen;

switch (var->bits_per_pixel) {
case 16: mask = 0x1F;
break;
case 32: mask = 0x0F;
break;
default: return -EINVAL;
}
vramlen = m2info->video.len_usable;
if (var->yres_virtual < var->yres)
var->yres_virtual = var->yres;
if (var->xres_virtual < var->xres)
var->xres_virtual = var->xres;
var->xres_virtual = (var->xres_virtual + mask) & ~mask;
if (var->yres_virtual > 32767)
return -EINVAL;
memlen = var->xres_virtual * var->yres_virtual * (var->bits_per_pixel >> 3);
if (memlen > vramlen)
return -EINVAL;
if (var->xoffset + var->xres > var->xres_virtual)
var->xoffset = var->xres_virtual - var->xres;
if (var->yoffset + var->yres > var->yres_virtual)
var->yoffset = var->yres_virtual - var->yres;

var->xres &= ~7;
var->left_margin &= ~7;
var->right_margin &= ~7;
var->hsync_len &= ~7;

*mode = var->bits_per_pixel;
if (var->bits_per_pixel == 16) {
if (var->green.length == 5) {
var->red.offset = 10;
var->red.length = 5;
var->green.offset = 5;
var->green.length = 5;
var->blue.offset = 0;
var->blue.length = 5;
var->transp.offset = 15;
var->transp.length = 1;
*mode = 15;
} else {
var->red.offset = 11;
var->red.length = 5;
var->green.offset = 5;
var->green.length = 6;
var->blue.offset = 0;
var->blue.length = 5;
var->transp.offset = 0;
var->transp.length = 0;
}
} else {
var->red.offset = 16;
var->red.length = 8;
var->green.offset = 8;
var->green.length = 8;
var->blue.offset = 0;
var->blue.length = 8;
var->transp.offset = 24;
var->transp.length = 8;
}
*visual = FB_VISUAL_TRUECOLOR;
*video_cmap_len = 16;
return 0;
}

static int matroxfb_dh_open(struct fb_info* info, int user) {
#define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
MINFO_FROM(m2info->primary_dev);

if (MINFO) {
int err;

if (ACCESS_FBINFO(dead)) {
return -ENXIO;
}
err = ACCESS_FBINFO(fbops).fb_open(&ACCESS_FBINFO(fbcon), user);
if (err) {
return err;
}
}
return 0;
#undef m2info
}

static int matroxfb_dh_release(struct fb_info* info, int user) {
#define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
int err = 0;
MINFO_FROM(m2info->primary_dev);

if (MINFO) {
err = ACCESS_FBINFO(fbops).fb_release(&ACCESS_FBINFO(fbcon), user);
}
return err;
#undef m2info
}

static void matroxfb_dh_init_fix(struct matroxfb_dh_fb_info *m2info) {
struct fb_fix_screeninfo *fix = &m2info->fbcon.fix;

strcpy(fix->id, "MATROX DH");

fix->smem_start = m2info->video.base;
fix->smem_len = m2info->video.len_usable;
fix->ypanstep = 1;
fix->ywrapstep = 0;
fix->xpanstep = 8; /* TBD */
fix->mmio_start = m2info->mmio.base;
fix->mmio_len = m2info->mmio.len;
fix->accel = 0; /* no accel... */
}

static int matroxfb_dh_check_var(struct fb_var_screeninfo* var, struct fb_info* info) {
#define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
int visual;
int cmap_len;
int mode;

return matroxfb_dh_decode_var(m2info, var, &visual, &cmap_len, &mode);
#undef m2info
}

static int matroxfb_dh_set_par(struct fb_info* info) {
#define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
int visual;
int cmap_len;
int mode;
int err;
struct fb_var_screeninfo* var = &info->var;
MINFO_FROM(m2info->primary_dev);

if ((err = matroxfb_dh_decode_var(m2info, var, &visual, &cmap_len, &mode)) != 0)
return err;
/* cmap */
{
m2info->fbcon.screen_base = vaddr_va(m2info->video.vbase);
m2info->fbcon.fix.visual = visual;
m2info->fbcon.fix.type = FB_TYPE_PACKED_PIXELS;
m2info->fbcon.fix.type_aux = 0;
m2info->fbcon.fix.line_length = (var->xres_virtual * var->bits_per_pixel) >> 3;
}
{
struct my_timming mt;
unsigned int pos;
int out;
int cnt;

matroxfb_var2my(&m2info->fbcon.var, &mt);
mt.crtc = MATROXFB_SRC_CRTC2;
/* CRTC2 delay */
mt.delay = 34;

pos = (m2info->fbcon.var.yoffset * m2info->fbcon.var.xres_virtual + m2info->fbcon.var.xoffset) * m2info->fbcon.var.bits_per_pixel >> 3;
pos += m2info->video.offbase;
cnt = 0;
down_read(&ACCESS_FBINFO(altout).lock);
for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
if (ACCESS_FBINFO(outputs[out]).src == MATROXFB_SRC_CRTC2) {
cnt++;
if (ACCESS_FBINFO(outputs[out]).output->compute) {
ACCESS_FBINFO(outputs[out]).output->compute(ACCESS_FBINFO(outputs[out]).data, &mt);
}
}
}
ACCESS_FBINFO(crtc2).pixclock = mt.pixclock;
ACCESS_FBINFO(crtc2).mnp = mt.mnp;
up_read(&ACCESS_FBINFO(altout).lock);
if (cnt) {
matroxfb_dh_restore(m2info, &mt, mode, pos);
} else {
matroxfb_dh_disable(m2info);
}
DAC1064_global_init(PMINFO2);
DAC1064_global_restore(PMINFO2);
down_read(&ACCESS_FBINFO(altout).lock);
for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
if (ACCESS_FBINFO(outputs[out]).src == MATROXFB_SRC_CRTC2 &&
ACCESS_FBINFO(outputs[out]).output->program) {
ACCESS_FBINFO(outputs[out]).output->program(ACCESS_FBINFO(outputs[out]).data);
}
}
for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
if (ACCESS_FBINFO(outputs[out]).src == MATROXFB_SRC_CRTC2 &&
ACCESS_FBINFO(outputs[out]).output->start) {
ACCESS_FBINFO(outputs[out]).output->start(ACCESS_FBINFO(outputs[out]).data);
}
}
up_read(&ACCESS_FBINFO(altout).lock);
matroxfb_dh_cfbX_init(m2info);
}
return 0;
#undef m2info
}

static int matroxfb_dh_pan_display(struct fb_var_screeninfo* var, struct fb_info* info) {
#define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
matroxfb_dh_pan_var(m2info, var);
return 0;
#undef m2info
}

static int matroxfb_dh_get_vblank(const struct matroxfb_dh_fb_info* m2info, struct fb_vblank* vblank) {
MINFO_FROM(m2info->primary_dev);

matroxfb_enable_irq(PMINFO 0);
memset(vblank, 0, sizeof(*vblank));
vblank->flags = FB_VBLANK_HAVE_VCOUNT | FB_VBLANK_HAVE_VBLANK;
/* mask out reserved bits + field number (odd/even) */
vblank->vcount = mga_inl(0x3C48) & 0x000007FF;
/* compatibility stuff */
if (vblank->vcount >= m2info->fbcon.var.yres)
vblank->flags |= FB_VBLANK_VBLANKING;
if (test_bit(0, &ACCESS_FBINFO(irq_flags))) {
vblank->flags |= FB_VBLANK_HAVE_COUNT;
/* Only one writer, aligned int value...
it should work without lock and without atomic_t */
vblank->count = ACCESS_FBINFO(crtc2).vsync.cnt;
}
return 0;
}

static int matroxfb_dh_ioctl(struct inode* inode,
struct file* file,
unsigned int cmd,
unsigned long arg,
struct fb_info* info) {
#define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
MINFO_FROM(m2info->primary_dev);

DBG(__FUNCTION__)

switch (cmd) {
case FBIOGET_VBLANK:
{
struct fb_vblank vblank;
int err;

err = matroxfb_dh_get_vblank(m2info, &vblank);
if (err)
return err;
if (copy_to_user((struct fb_vblank*)arg, &vblank, sizeof(vblank)))
return -EFAULT;
return 0;
}
case FBIO_WAITFORVSYNC:
{
u_int32_t crt;

if (get_user(crt, (u_int32_t *)arg))
return -EFAULT;

if (crt != 0)
return -ENODEV;
return matroxfb_wait_for_sync(PMINFO 1);
}
case MATROXFB_SET_OUTPUT_MODE:
case MATROXFB_GET_OUTPUT_MODE:
case MATROXFB_GET_ALL_OUTPUTS:
{
return ACCESS_FBINFO(fbcon.fbops)->fb_ioctl(inode, file, cmd, arg, &ACCESS_FBINFO(fbcon));
}
case MATROXFB_SET_OUTPUT_CONNECTION:
{
u_int32_t tmp;
int out;
int changes;

if (get_user(tmp, (u_int32_t*)arg))
return -EFAULT;
for (out = 0; out < 32; out++) {
if (tmp & (1 << out)) {
if (out >= MATROXFB_MAX_OUTPUTS)
return -ENXIO;
if (!ACCESS_FBINFO(outputs[out]).output)
return -ENXIO;
switch (ACCESS_FBINFO(outputs[out]).src) {
case MATROXFB_SRC_NONE:
case MATROXFB_SRC_CRTC2:
break;
default:
return -EBUSY;
}
}
}
if (ACCESS_FBINFO(devflags.panellink)) {
if (tmp & MATROXFB_OUTPUT_CONN_DFP)
return -EINVAL;
if ((ACCESS_FBINFO(outputs[2]).src == MATROXFB_SRC_CRTC1) && tmp)
return -EBUSY;
}
changes = 0;
for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
if (tmp & (1 << out)) {
if (ACCESS_FBINFO(outputs[out]).src != MATROXFB_SRC_CRTC2) {
changes = 1;
ACCESS_FBINFO(outputs[out]).src = MATROXFB_SRC_CRTC2;
}
} else if (ACCESS_FBINFO(outputs[out]).src == MATROXFB_SRC_CRTC2) {
changes = 1;
ACCESS_FBINFO(outputs[out]).src = MATROXFB_SRC_NONE;
}
}
if (!changes)
return 0;
matroxfb_dh_set_par(info);
return 0;
}
case MATROXFB_GET_OUTPUT_CONNECTION:
{
u_int32_t conn = 0;
int out;

for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
if (ACCESS_FBINFO(outputs[out]).src == MATROXFB_SRC_CRTC2) {
conn |= 1 << out;
}
}
if (put_user(conn, (u_int32_t*)arg))
return -EFAULT;
return 0;
}
case MATROXFB_GET_AVAILABLE_OUTPUTS:
{
u_int32_t tmp = 0;
int out;

for (out = 0; out < MATROXFB_MAX_OUTPUTS; out++) {
if (ACCESS_FBINFO(outputs[out]).output) {
switch (ACCESS_FBINFO(outputs[out]).src) {
case MATROXFB_SRC_NONE:
case MATROXFB_SRC_CRTC2:
tmp |= 1 << out;
break;
}
}
}
if (ACCESS_FBINFO(devflags.panellink)) {
tmp &= ~MATROXFB_OUTPUT_CONN_DFP;
if (ACCESS_FBINFO(outputs[2]).src == MATROXFB_SRC_CRTC1) {
tmp = 0;
}
}
if (put_user(tmp, (u_int32_t*)arg))
return -EFAULT;
return 0;
}
}
return -ENOTTY;
#undef m2info
}

static int matroxfb_dh_blank(int blank, struct fb_info* info) {
#define m2info (container_of(info, struct matroxfb_dh_fb_info, fbcon))
switch (blank) {
case 1:
case 2:
case 3:
case 4:
default:;
}
/* do something... */
return 0;
#undef m2info
}

static struct fb_ops matroxfb_dh_ops = {
.owner = THIS_MODULE,
.fb_open = matroxfb_dh_open,
.fb_release = matroxfb_dh_release,
.fb_check_var = matroxfb_dh_check_var,
.fb_set_par = matroxfb_dh_set_par,
.fb_setcolreg = matroxfb_dh_setcolreg,
.fb_pan_display =matroxfb_dh_pan_display,
.fb_blank = matroxfb_dh_blank,
.fb_ioctl = matroxfb_dh_ioctl,
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
.fb_cursor = soft_cursor,
};

static struct fb_var_screeninfo matroxfb_dh_defined = {
640,480,640,480,/* W,H, virtual W,H */
0,0, /* offset */
32, /* depth */
0, /* gray */
{0,0,0}, /* R */
{0,0,0}, /* G */
{0,0,0}, /* B */
{0,0,0}, /* alpha */
0, /* nonstd */
FB_ACTIVATE_NOW,
-1,-1, /* display size */
0, /* accel flags */
39721L,48L,16L,33L,10L,
96L,2,0, /* no sync info */
FB_VMODE_NONINTERLACED,
0, {0,0,0,0,0}
};

static int matroxfb_dh_regit(CPMINFO struct matroxfb_dh_fb_info* m2info) {
#define minfo (m2info->primary_dev)
void* oldcrtc2;

m2info->fbcon.fbops = &matroxfb_dh_ops;
m2info->fbcon.flags = FBINFO_FLAG_DEFAULT;
m2info->fbcon.currcon = -1;
m2info->fbcon.pseudo_palette = m2info->cmap;
fb_alloc_cmap(&m2info->fbcon.cmap, 256, 1);

if (mem < 64)
mem *= 1024;
if (mem < 64*1024)
mem *= 1024;
mem &= ~0x00000FFF; /* PAGE_MASK? */
if (ACCESS_FBINFO(video.len_usable) + mem <= ACCESS_FBINFO(video.len))
m2info->video.offbase = ACCESS_FBINFO(video.len) - mem;
else if (ACCESS_FBINFO(video.len) < mem) {
return -ENOMEM;
} else { /* check yres on first head... */
m2info->video.borrowed = mem;
ACCESS_FBINFO(video.len_usable) -= mem;
m2info->video.offbase = ACCESS_FBINFO(video.len_usable);
}
m2info->video.base = ACCESS_FBINFO(video.base) + m2info->video.offbase;
m2info->video.len = m2info->video.len_usable = m2info->video.len_maximum = mem;
m2info->video.vbase.vaddr = vaddr_va(ACCESS_FBINFO(video.vbase)) + m2info->video.offbase;
m2info->mmio.base = ACCESS_FBINFO(mmio.base);
m2info->mmio.vbase = ACCESS_FBINFO(mmio.vbase);
m2info->mmio.len = ACCESS_FBINFO(mmio.len);

/*
* If we have unused output, connect CRTC2 to it...
*/
if (ACCESS_FBINFO(outputs[1]).output &&
ACCESS_FBINFO(outputs[1]).src == MATROXFB_SRC_NONE &&
ACCESS_FBINFO(outputs[2]).src == MATROXFB_SRC_NONE) {
ACCESS_FBINFO(outputs[1]).src = MATROXFB_SRC_CRTC2;
}

matroxfb_dh_init_fix(m2info);
if (register_framebuffer(&m2info->fbcon)) {
return -ENXIO;
}
if (m2info->fbcon.currcon < 0) {
fb_set_var(&m2info->fbcon, &matroxfb_dh_defined);
}
down_write(&ACCESS_FBINFO(crtc2.lock));
oldcrtc2 = ACCESS_FBINFO(crtc2.info);
ACCESS_FBINFO(crtc2.info) = m2info;
up_write(&ACCESS_FBINFO(crtc2.lock));
if (oldcrtc2) {
printk(KERN_ERR "matroxfb_crtc2: Internal consistency check failed: crtc2 already present: %p\n",
oldcrtc2);
}
return 0;
#undef minfo
}

/* ************************** */

static int matroxfb_dh_registerfb(struct matroxfb_dh_fb_info* m2info) {
#define minfo (m2info->primary_dev)
if (matroxfb_dh_regit(PMINFO m2info)) {
printk(KERN_ERR "matroxfb_crtc2: secondary head failed to register\n");
return -1;
}
printk(KERN_INFO "matroxfb_crtc2: secondary head of fb%u was registered as fb%u\n",
ACCESS_FBINFO(fbcon.node), m2info->fbcon.node);
m2info->fbcon_registered = 1;
return 0;
#undef minfo
}

static void matroxfb_dh_deregisterfb(struct matroxfb_dh_fb_info* m2info) {
#define minfo (m2info->primary_dev)
if (m2info->fbcon_registered) {
int id;
struct matroxfb_dh_fb_info* crtc2;

down_write(&ACCESS_FBINFO(crtc2.lock));
crtc2 = ACCESS_FBINFO(crtc2.info);
if (crtc2 == m2info)
ACCESS_FBINFO(crtc2.info) = NULL;
up_write(&ACCESS_FBINFO(crtc2.lock));
if (crtc2 != m2info) {
printk(KERN_ERR "matroxfb_crtc2: Internal consistency check failed: crtc2 mismatch at unload: %p != %p\n",
crtc2, m2info);
printk(KERN_ERR "matroxfb_crtc2: Expect kernel crash after module unload.\n");
return;
}
id = m2info->fbcon.node;
unregister_framebuffer(&m2info->fbcon);
/* return memory back to primary head */
ACCESS_FBINFO(video.len_usable) += m2info->video.borrowed;
printk(KERN_INFO "matroxfb_crtc2: fb%u unregistered\n", id);
m2info->fbcon_registered = 0;
}
#undef minfo
}

static void* matroxfb_crtc2_probe(struct matrox_fb_info* minfo) {
struct matroxfb_dh_fb_info* m2info;

/* hardware is CRTC2 incapable... */
if (!ACCESS_FBINFO(devflags.crtc2))
return NULL;
m2info = (struct matroxfb_dh_fb_info*)kmalloc(sizeof(*m2info), GFP_KERNEL);
if (!m2info) {
printk(KERN_ERR "matroxfb_crtc2: Not enough memory for CRTC2 control structs\n");
return NULL;
}
memset(m2info, 0, sizeof(*m2info));
m2info->primary_dev = MINFO;
if (matroxfb_dh_registerfb(m2info)) {
kfree(m2info);
printk(KERN_ERR "matroxfb_crtc2: CRTC2 framebuffer failed to register\n");
return NULL;
}
return m2info;
}

static void matroxfb_crtc2_remove(struct matrox_fb_info* minfo, void* crtc2) {
matroxfb_dh_deregisterfb(crtc2);
kfree(crtc2);
}

static struct matroxfb_driver crtc2 = {
.name = "Matrox G400 CRTC2",
.probe = matroxfb_crtc2_probe,
.remove = matroxfb_crtc2_remove };

static int matroxfb_crtc2_init(void) {
matroxfb_register_driver(&crtc2);
return 0;
}

static void matroxfb_crtc2_exit(void) {
matroxfb_unregister_driver(&crtc2);
}

MODULE_AUTHOR("(c) 1999-2002 Petr Vandrovec <vandrove@vc.cvut.cz>");
MODULE_DESCRIPTION("Matrox G400 CRTC2 driver");
MODULE_LICENSE("GPL");
module_init(matroxfb_crtc2_init);
module_exit(matroxfb_crtc2_exit);
/* we do not have __setup() yet */

Subversion Repositories shark

(root)/shark/branches/xen/drivers/fb/matrox/matroxfb_crtc2.c - Rev 489