matroxfb_crtc2.c

linux-2.4.29操作系统的源码

		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, p);
		my_install_cmap(m2info);
	}
	return 0;
#undef m2info
}

static int matroxfb_dh_get_cmap(struct fb_cmap* cmap, int kspc, int con,
		struct fb_info* info) {
#define m2info (list_entry(info, struct matroxfb_dh_fb_info, fbcon))
	struct display* dsp;

	if (con < 0)
		dsp = m2info->fbcon.disp;
	else
		dsp = fb_display + con;
	if (con == m2info->currcon)
		return fb_get_cmap(cmap, kspc, matroxfb_dh_getcolreg, info);
	else if (dsp->cmap.len)
		fb_copy_cmap(&dsp->cmap, cmap, kspc ? 0 : 2);
	else
		fb_copy_cmap(fb_default_cmap(16), cmap, kspc ? 0 : 2);
	return 0;
#undef m2info
}

static int matroxfb_dh_set_cmap(struct fb_cmap* cmap, int kspc, int con,
		struct fb_info* info) {
#define m2info (list_entry(info, struct matroxfb_dh_fb_info, fbcon))
	struct display* dsp;

	if (con < 0)
		dsp = m2info->fbcon.disp;
	else
		dsp = fb_display + con;
	if (dsp->cmap.len != 16) {
		int err;

		err = fb_alloc_cmap(&dsp->cmap, 16, 0);
		if (err)
			return err;
	}
	if (con == m2info->currcon)
		return fb_set_cmap(cmap, kspc, matroxfb_dh_setcolreg, info);
	else
		fb_copy_cmap(cmap, &dsp->cmap, kspc ? 0 : 1);
	return 0;
#undef m2info
}

static int matroxfb_dh_pan_display(struct fb_var_screeninfo* var, int con,
		struct fb_info* info) {
#define m2info (list_entry(info, struct matroxfb_dh_fb_info, fbcon))
	struct display* dsp;

	if (con < 0)
		dsp = m2info->fbcon.disp;
	else
		dsp = fb_display + con;
	if (var->xoffset + dsp->var.xres > dsp->var.xres_virtual ||
	    var->yoffset + dsp->var.yres > dsp->var.yres_virtual)
		return -EINVAL;
	if (con == m2info->currcon)
		matroxfb_dh_pan_var(m2info, var);
	dsp->var.xoffset = var->xoffset;
	dsp->var.yoffset = var->yoffset;
	return 0;
#undef m2info
}

static int matroxfb_dh_switch(int con, struct fb_info* info);

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->currcon_display->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,
		int con,
		struct fb_info* info) {
#define m2info (list_entry(info, struct matroxfb_dh_fb_info, fbcon))
	MINFO_FROM(m2info->primary_dev);

	DBG("matroxfb_crtc2_ioctl")

	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, con, &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_switch(m2info->currcon, 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 -EINVAL;
#undef m2info
}

static int matroxfb_dh_blank(int blank, struct fb_info* info) {
#define m2info (list_entry(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 void matroxfb_dh_blank24(int blank, struct fb_info* info) {
	matroxfb_dh_blank(blank, info);
}

static struct fb_ops matroxfb_dh_ops = {
	owner:		THIS_MODULE,
	fb_open:	matroxfb_dh_open,
	fb_release:	matroxfb_dh_release,
	fb_get_fix:	matroxfb_dh_get_fix,
	fb_get_var:	matroxfb_dh_get_var,
	fb_set_var:	matroxfb_dh_set_var,
	fb_get_cmap:	matroxfb_dh_get_cmap,
	fb_set_cmap:	matroxfb_dh_set_cmap,
	fb_pan_display:	matroxfb_dh_pan_display,
	fb_ioctl:	matroxfb_dh_ioctl,
};

static int matroxfb_dh_switch(int con, struct fb_info* info) {
#define m2info (list_entry(info, struct matroxfb_dh_fb_info, fbcon))
	struct fb_cmap* cmap;
	struct display* p;

	if (m2info->currcon >= 0) {
		cmap = &m2info->currcon_display->cmap;
		if (cmap->len) {
			fb_get_cmap(cmap, 1, matroxfb_dh_getcolreg, info);
		}
	}
	m2info->currcon = con;
	if (con < 0)
		p = m2info->fbcon.disp;
	else
		p = fb_display + con;
	m2info->currcon_display = p;
	p->var.activate = FB_ACTIVATE_NOW;
	matroxfb_dh_set_var(&p->var, con, info);
	return 0;
#undef m2info
}

static int matroxfb_dh_updatevar(int con, struct fb_info* info) {
#define m2info (list_entry(info, struct matroxfb_dh_fb_info, fbcon))
	matroxfb_dh_pan_var(m2info, &fb_display[con].var);
	return 0;
#undef m2info
}

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)
	struct display* d;
	void* oldcrtc2;

	d = kmalloc(sizeof(*d), GFP_KERNEL);
	if (!d) {
		return -ENOMEM;
	}

	memset(d, 0, sizeof(*d));

	strcpy(m2info->fbcon.modename, "MATROX CRTC2");
	m2info->fbcon.changevar = NULL;
	m2info->fbcon.node = NODEV;
	m2info->fbcon.fbops = &matroxfb_dh_ops;
	m2info->fbcon.disp = d;
	m2info->fbcon.switch_con = &matroxfb_dh_switch;
	m2info->fbcon.updatevar = &matroxfb_dh_updatevar;
	m2info->fbcon.blank = &matroxfb_dh_blank24;
	m2info->fbcon.flags = FBINFO_FLAG_DEFAULT;
	m2info->currcon = -1;
	m2info->currcon_display = d;

	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) {
		kfree(d);
		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_set_var(&matroxfb_dh_defined, -2, &m2info->fbcon);
	if (register_framebuffer(&m2info->fbcon)) {
		kfree(d);
		return -ENXIO;
	}
	if (m2info->currcon < 0) {
		matroxfb_dh_set_var(&matroxfb_dh_defined, -1, &m2info->fbcon);
	}
	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",
		GET_FB_IDX(ACCESS_FBINFO(fbcon.node)), GET_FB_IDX(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 = GET_FB_IDX(m2info->fbcon.node);
		unregister_framebuffer(&m2info->fbcon);
		kfree(m2info->fbcon.disp);
		/* 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 <[e-mail]>");
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 */