matroxfb_base.c

一个2.4.21版本的嵌入式linux内核

	ACCESS_FBINFO(chip) = b->chip;
	ACCESS_FBINFO(capable.srcorg) = b->flags & DEVF_SRCORG;
	ACCESS_FBINFO(devflags.video64bits) = b->flags & DEVF_VIDEO64BIT;
	if (b->flags & DEVF_TEXT4B) {
		ACCESS_FBINFO(devflags.vgastep) = 4;
		ACCESS_FBINFO(devflags.textmode) = 4;
		ACCESS_FBINFO(devflags.text_type_aux) = FB_AUX_TEXT_MGA_STEP16;
	} else if (b->flags & DEVF_TEXT16B) {
		ACCESS_FBINFO(devflags.vgastep) = 16;
		ACCESS_FBINFO(devflags.textmode) = 1;
		ACCESS_FBINFO(devflags.text_type_aux) = FB_AUX_TEXT_MGA_STEP16;
	} else {
		ACCESS_FBINFO(devflags.vgastep) = 8;
		ACCESS_FBINFO(devflags.textmode) = 1;
		ACCESS_FBINFO(devflags.text_type_aux) = FB_AUX_TEXT_MGA_STEP8;
	}
#ifdef CONFIG_FB_MATROX_32MB
	ACCESS_FBINFO(devflags.support32MB) = (b->flags & DEVF_SUPPORT32MB) != 0;
#endif
	ACCESS_FBINFO(devflags.precise_width) = !(b->flags & DEVF_ANY_VXRES);
	ACCESS_FBINFO(devflags.crtc2) = (b->flags & DEVF_CRTC2) != 0;
	ACCESS_FBINFO(devflags.maven_capable) = (b->flags & DEVF_MAVEN_CAPABLE) != 0;
	ACCESS_FBINFO(devflags.dualhead) = (b->flags & DEVF_DUALHEAD) != 0;
	if (b->flags & DEVF_PANELLINK_CAPABLE) {
		ACCESS_FBINFO(outputs[2]).data = MINFO;
		ACCESS_FBINFO(outputs[2]).output = &panellink_output;
		if (dfp)
			ACCESS_FBINFO(outputs[2]).src = MATROXFB_SRC_CRTC1;
		else
			ACCESS_FBINFO(outputs[2]).src = MATROXFB_SRC_NONE;
		ACCESS_FBINFO(outputs[2]).mode = MATROXFB_OUTPUT_MODE_MONITOR;
		ACCESS_FBINFO(devflags.panellink) = 1;
	}
	ACCESS_FBINFO(devflags.dfp_type) = dfp_type;
	ACCESS_FBINFO(devflags.g450dac) = (b->flags & DEVF_G450DAC) != 0;
	ACCESS_FBINFO(devflags.textstep) = ACCESS_FBINFO(devflags.vgastep) * ACCESS_FBINFO(devflags.textmode);
	ACCESS_FBINFO(devflags.textvram) = 65536 / ACCESS_FBINFO(devflags.textmode);

	if (ACCESS_FBINFO(capable.cross4MB) < 0)
		ACCESS_FBINFO(capable.cross4MB) = b->flags & DEVF_CROSS4MB;
	if (b->flags & DEVF_SWAPS) {
		ctrlptr_phys = pci_resource_start(ACCESS_FBINFO(pcidev), 1);
		video_base_phys = pci_resource_start(ACCESS_FBINFO(pcidev), 0);
		ACCESS_FBINFO(devflags.fbResource) = PCI_BASE_ADDRESS_0;
	} else {
		ctrlptr_phys = pci_resource_start(ACCESS_FBINFO(pcidev), 0);
		video_base_phys = pci_resource_start(ACCESS_FBINFO(pcidev), 1);
		ACCESS_FBINFO(devflags.fbResource) = PCI_BASE_ADDRESS_1;
	}
	err = -EINVAL;
	if (!ctrlptr_phys) {
		printk(KERN_ERR "matroxfb: control registers are not available, matroxfb disabled\n");
		goto fail;
	}
	if (!video_base_phys) {
		printk(KERN_ERR "matroxfb: video RAM is not available in PCI address space, matroxfb disabled\n");
		goto fail;
	}
	memsize = b->base->maxvram;
	if (!request_mem_region(ctrlptr_phys, 16384, "matroxfb MMIO")) {
		goto fail;
	}
	if (!request_mem_region(video_base_phys, memsize, "matroxfb FB")) {
		goto failCtrlMR;
	}
	ACCESS_FBINFO(video.len_maximum) = memsize;
	/* convert mem (autodetect k, M) */
	if (mem < 1024) mem *= 1024;
	if (mem < 0x00100000) mem *= 1024;

	if (mem && (mem < memsize))
		memsize = mem;
	err = -ENOMEM;
	if (mga_ioremap(ctrlptr_phys, 16384, MGA_IOREMAP_MMIO, &ACCESS_FBINFO(mmio.vbase))) {
		printk(KERN_ERR "matroxfb: cannot ioremap(%lX, 16384), matroxfb disabled\n", ctrlptr_phys);
		goto failVideoMR;
	}
	ACCESS_FBINFO(mmio.base) = ctrlptr_phys;
	ACCESS_FBINFO(mmio.len) = 16384;
	ACCESS_FBINFO(video.base) = video_base_phys;
	if (mga_ioremap(video_base_phys, memsize, MGA_IOREMAP_FB, &ACCESS_FBINFO(video.vbase))) {
		printk(KERN_ERR "matroxfb: cannot ioremap(%lX, %d), matroxfb disabled\n",
			video_base_phys, memsize);
		goto failCtrlIO;
	}
	{
		u_int32_t cmd;
		u_int32_t mga_option;

		pci_read_config_dword(ACCESS_FBINFO(pcidev), PCI_OPTION_REG, &mga_option);
		pci_read_config_dword(ACCESS_FBINFO(pcidev), PCI_COMMAND, &cmd);
		mga_option &= 0x7FFFFFFF; /* clear BIG_ENDIAN */
		mga_option |= MX_OPTION_BSWAP;
                /* disable palette snooping */
                cmd &= ~PCI_COMMAND_VGA_PALETTE;
		if (pci_find_device(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82437, NULL)) {
			if (!(mga_option & 0x20000000) && !ACCESS_FBINFO(devflags.nopciretry)) {
				printk(KERN_WARNING "matroxfb: Disabling PCI retries due to i82437 present\n");
			}
			mga_option |= 0x20000000;
			ACCESS_FBINFO(devflags.nopciretry) = 1;
		}
		pci_write_config_dword(ACCESS_FBINFO(pcidev), PCI_COMMAND, cmd);
		pci_write_config_dword(ACCESS_FBINFO(pcidev), PCI_OPTION_REG, mga_option);
		ACCESS_FBINFO(hw).MXoptionReg = mga_option;

		/* select non-DMA memory for PCI_MGA_DATA, otherwise dump of PCI cfg space can lock PCI bus */
		/* maybe preinit() candidate, but it is same... for all devices... at this time... */
		pci_write_config_dword(ACCESS_FBINFO(pcidev), PCI_MGA_INDEX, 0x00003C00);
	}

	err = -ENXIO;
	matroxfb_read_pins(PMINFO2);
	if (ACCESS_FBINFO(hw_switch)->preinit(PMINFO2)) {
		goto failVideoIO;
	}

	err = -ENOMEM;
	if (!matroxfb_getmemory(PMINFO memsize, &ACCESS_FBINFO(video.len)) || !ACCESS_FBINFO(video.len)) {
		printk(KERN_ERR "matroxfb: cannot determine memory size\n");
		goto failVideoIO;
	}
	ACCESS_FBINFO(devflags.ydstorg) = 0;

	ACCESS_FBINFO(currcon) = -1;
	ACCESS_FBINFO(currcon_display) = d;
	ACCESS_FBINFO(video.base) = video_base_phys;
	ACCESS_FBINFO(video.len_usable) = ACCESS_FBINFO(video.len);
	if (ACCESS_FBINFO(video.len_usable) > b->base->maxdisplayable)
		ACCESS_FBINFO(video.len_usable) = b->base->maxdisplayable;
#ifdef CONFIG_MTRR
	if (mtrr) {
		ACCESS_FBINFO(mtrr.vram) = mtrr_add(video_base_phys, ACCESS_FBINFO(video.len), MTRR_TYPE_WRCOMB, 1);
		ACCESS_FBINFO(mtrr.vram_valid) = 1;
		printk(KERN_INFO "matroxfb: MTRR's turned on\n");
	}
#endif	/* CONFIG_MTRR */

	if (!ACCESS_FBINFO(devflags.novga))
		request_region(0x3C0, 32, "matrox");
	matroxfb_g450_connect(PMINFO2);
	ACCESS_FBINFO(hw_switch->reset(PMINFO2));

	ACCESS_FBINFO(fbcon.monspecs.hfmin) = 0;
	ACCESS_FBINFO(fbcon.monspecs.hfmax) = fh;
	ACCESS_FBINFO(fbcon.monspecs.vfmin) = 0;
	ACCESS_FBINFO(fbcon.monspecs.vfmax) = fv;
	ACCESS_FBINFO(fbcon.monspecs.dpms) = 0;	/* TBD */

	/* static settings */
	if ((depth == RSText8) && (!*ACCESS_FBINFO(fbcon.fontname))) {
		strcpy(ACCESS_FBINFO(fbcon.fontname), "VGA8x8");
	}
	vesafb_defined.red = colors[depth-1].red;
	vesafb_defined.green = colors[depth-1].green;
	vesafb_defined.blue = colors[depth-1].blue;
	vesafb_defined.bits_per_pixel = colors[depth-1].bits_per_pixel;
	vesafb_defined.grayscale = grayscale;
	vesafb_defined.vmode = 0;
	if (noaccel)
		vesafb_defined.accel_flags &= ~FB_ACCELF_TEXT;

	strcpy(ACCESS_FBINFO(fbcon.modename), "MATROX VGA");
	ACCESS_FBINFO(fbcon.changevar) = NULL;
	ACCESS_FBINFO(fbcon.node) = NODEV;
	ACCESS_FBINFO(fbcon.fbops) = &matroxfb_ops;
	ACCESS_FBINFO(fbcon.disp) = d;
	ACCESS_FBINFO(fbcon.switch_con) = &matroxfb_switch;
	ACCESS_FBINFO(fbcon.updatevar) = &matroxfb_updatevar;
	ACCESS_FBINFO(fbcon.blank) = &matroxfb_blank24;
	/* after __init time we are like module... no logo */
	ACCESS_FBINFO(fbcon.flags) = hotplug ? FBINFO_FLAG_MODULE : FBINFO_FLAG_DEFAULT;
	ACCESS_FBINFO(video.len_usable) &= PAGE_MASK;

#ifndef MODULE
	/* mode database is marked __init!!! */
	if (!hotplug) {
		fb_find_mode(&vesafb_defined, &ACCESS_FBINFO(fbcon), videomode[0]?videomode:NULL,
			NULL, 0, &defaultmode, vesafb_defined.bits_per_pixel);
	}
#endif /* !MODULE */

	/* mode modifiers */
	if (hslen)
		vesafb_defined.hsync_len = hslen;
	if (vslen)
		vesafb_defined.vsync_len = vslen;
	if (left != ~0)
		vesafb_defined.left_margin = left;
	if (right != ~0)
		vesafb_defined.right_margin = right;
	if (upper != ~0)
		vesafb_defined.upper_margin = upper;
	if (lower != ~0)
		vesafb_defined.lower_margin = lower;
	if (xres)
		vesafb_defined.xres = xres;
	if (yres)
		vesafb_defined.yres = yres;
	if (sync != -1)
		vesafb_defined.sync = sync;
	else if (vesafb_defined.sync == ~0) {
		vesafb_defined.sync = 0;
		if (yres < 400)
			vesafb_defined.sync |= FB_SYNC_HOR_HIGH_ACT;
		else if (yres < 480)
			vesafb_defined.sync |= FB_SYNC_VERT_HIGH_ACT;
	}

	/* fv, fh, maxclk limits was specified */
	{
		unsigned int tmp;

		if (fv) {
			tmp = fv * (vesafb_defined.upper_margin + vesafb_defined.yres
			          + vesafb_defined.lower_margin + vesafb_defined.vsync_len);
			if ((tmp < fh) || (fh == 0)) fh = tmp;
		}
		if (fh) {
			tmp = fh * (vesafb_defined.left_margin + vesafb_defined.xres
			          + vesafb_defined.right_margin + vesafb_defined.hsync_len);
			if ((tmp < maxclk) || (maxclk == 0)) maxclk = tmp;
		}
		tmp = (maxclk + 499) / 500;
		if (tmp) {
			tmp = (2000000000 + tmp) / tmp;
			if (tmp > pixclock) pixclock = tmp;
		}
	}
	if (pixclock) {
		if (pixclock < 2000)		/* > 500MHz */
			pixclock = 4000;	/* 250MHz */
		if (pixclock > 1000000)
			pixclock = 1000000;	/* 1MHz */
		vesafb_defined.pixclock = pixclock;
	}

	/* FIXME: Where to move this?! */
#if defined(CONFIG_ALL_PPC)
#if defined(CONFIG_FB_COMPAT_XPMAC)
	strcpy(ACCESS_FBINFO(matrox_name), "MTRX,");	/* OpenFirmware naming convension */
	strncat(ACCESS_FBINFO(matrox_name), b->name, 26);
	if (!console_fb_info)
		console_fb_info = &ACCESS_FBINFO(fbcon);
#endif
#ifndef MODULE
	if (_machine == _MACH_Pmac) {
		struct fb_var_screeninfo var;
		if (default_vmode <= 0 || default_vmode > VMODE_MAX)
			default_vmode = VMODE_640_480_60;
#ifdef CONFIG_NVRAM
		if (default_cmode == CMODE_NVRAM)
			default_cmode = nvram_read_byte(NV_CMODE);
#endif
		if (default_cmode < CMODE_8 || default_cmode > CMODE_32)
			default_cmode = CMODE_8;
		if (!mac_vmode_to_var(default_vmode, default_cmode, &var)) {
			var.accel_flags = vesafb_defined.accel_flags;
			var.xoffset = var.yoffset = 0;
			/* Note: mac_vmode_to_var() does not set all parameters */
			vesafb_defined = var;
		}
	}
#endif /* !MODULE */
#endif /* CONFIG_ALL_PPC */
	vesafb_defined.xres_virtual = vesafb_defined.xres;
	if (nopan) {
		vesafb_defined.yres_virtual = vesafb_defined.yres;
	} else {
		vesafb_defined.yres_virtual = 65536; /* large enough to be INF, but small enough
							to yres_virtual * xres_virtual < 2^32 */
	}
	err = -EINVAL;
	if (matroxfb_set_var(&vesafb_defined, -2, &ACCESS_FBINFO(fbcon))) {
		printk(KERN_ERR "matroxfb: cannot set required parameters\n");
		goto failVideoIO;
	}

	printk(KERN_INFO "matroxfb: %dx%dx%dbpp (virtual: %dx%d)\n",
		vesafb_defined.xres, vesafb_defined.yres, vesafb_defined.bits_per_pixel,
		vesafb_defined.xres_virtual, vesafb_defined.yres_virtual);
	printk(KERN_INFO "matroxfb: framebuffer at 0x%lX, mapped to 0x%p, size %d\n",
		ACCESS_FBINFO(video.base), vaddr_va(ACCESS_FBINFO(video.vbase)), ACCESS_FBINFO(video.len));

/* We do not have to set currcon to 0... register_framebuffer do it for us on first console
 * and we do not want currcon == 0 for subsequent framebuffers */

	if (register_framebuffer(&ACCESS_FBINFO(fbcon)) < 0) {
		goto failVideoIO;
	}
	printk("fb%d: %s frame buffer device\n",
	       GET_FB_IDX(ACCESS_FBINFO(fbcon.node)), ACCESS_FBINFO(fbcon.modename));
	if (ACCESS_FBINFO(currcon) < 0) {
		/* there is no console on this fb... but we have to initialize hardware
		 * until someone tells me what is proper thing to do */
		printk(KERN_INFO "fb%d: initializing hardware\n",
			GET_FB_IDX(ACCESS_FBINFO(fbcon.node)));
		matroxfb_set_var(&vesafb_defined, -1, &ACCESS_FBINFO(fbcon));
	}
	return 0;
failVideoIO:;
	matroxfb_g450_shutdown(PMINFO2);
	mga_iounmap(ACCESS_FBINFO(video.vbase));
failCtrlIO:;
	mga_iounmap(ACCESS_FBINFO(mmio.vbase));
failVideoMR:;
	release_mem_region(video_base_phys, ACCESS_FBINFO(video.len_maximum));
failCtrlMR:;
	release_mem_region(ctrlptr_phys, 16384);
fail:;
	return err;
}

LIST_HEAD(matroxfb_list);
LIST_HEAD(matroxfb_driver_list);

#define matroxfb_l(x) list_entry(x, struct matrox_fb_info, next_fb)
#define matroxfb_driver_l(x) list_entry(x, struct matroxfb_driver, node)
int matroxfb_register_driver(struct matroxfb_driver* drv) {
	struct matrox_fb_info* minfo;

	list_add(&drv->node, &matroxfb_driver_list);
	for (minfo = matroxfb_l(matroxfb_list.next);
	     minfo != matroxfb_l(&matroxfb_list);
	     minfo = matroxfb_l(minfo->next_fb.next)) {
		void* p;

		if (minfo->drivers_count == MATROXFB_MAX_FB_DRIVERS)
			continue;
		p = drv->probe(minfo);
		if (p) {
			minfo->drivers_data[minfo->drivers_count] = p;
			minfo->drivers[minfo->drivers_count++] = drv;
		}
	}
	return 0;
}

void matroxfb_unregister_driver(struct matroxfb_driver* drv) {
	struct matrox_fb_info* minfo;

	list_del(&drv->node);
	for (minfo = matroxfb_l(matroxfb_list.next);
	     minfo != matroxfb_l(&matroxfb_list);
	     minfo = matroxfb_l(minfo->next_fb.next)) {
		int i;

		for (i = 0; i < minfo->drivers_count; ) {
			if (minfo->drivers[i] == drv) {
				if (drv && drv->remove)
					drv->remove(minfo, minfo->drivers_data[i]);
				minfo->drivers[i] = minfo->drivers[--minfo->drivers_count];
				minfo->drivers_data[i] = minfo->drivers_data[minfo->drivers_count];
			} else
				i++;
		}
	}
}

static void matroxfb_register_device(struct matrox_fb_info* minfo) {
	struct matroxfb_driver* drv;
	int i = 0;
	list_add(&ACCESS_FBINFO(next_fb), &matroxfb_list);
	for (drv = matroxfb_driver_l(matroxfb_driver_list.next);
	     drv != matroxfb_driver_l(&matroxfb_driver_list);
	     drv = matroxfb_driver_l(drv->node.next)) {
		if (drv && drv->probe) {
			void *p = drv->probe(minfo);
			if (p) {
				minfo->drivers_data[i] = p;
				minfo->drivers[i++] = drv;
				if (i == MATROXFB_MAX_FB_DRIVERS)
					break;
			}
		}
	}
	minfo->drivers_count = i;
}

static void matroxfb_unregister_device(struct matrox_fb_info* minfo) {
	int i;

	list_del(&ACCESS_FBINFO(next_fb));
	for (i = 0; i < minfo->drivers_count; i++) {
		struct matroxfb_driver* drv = minfo->drivers[i];

		if (drv && drv->remove)
			drv->remove(minfo, minfo->drivers_data[i]);
	}
}

static int matroxfb_probe(struct pci_dev* pdev, const struct pci_device_id* dummy) {
	struct board* b;
	u_int8_t rev;
	u_int16_t svid;
	u_int16_t sid;
	struct matrox_fb_info* minfo;
	struct display* d;
	int err;
	u_int32_t cmd;
#ifndef CONFIG_FB_MATROX_MULTIHEAD
	static int registered = 0;
	static struct display global_disp;
#endif
	DBG("matroxfb_probe")

	pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
	svid = pdev->subsystem_vendor;
	sid = pdev->subsystem_device;
	for (b = dev_list; b->vendor; b++) {
		if ((b->vendor != pdev->vendor) || (b->device != pdev->device) || (b->rev < rev)) continue;
		if (b->svid)
			if ((b->svid != svid) || (b->sid != sid)) continue;
		break;
	}
	/* not match... */
	if (!b->vendor)
		return -1;
	if (dev > 0) {
		/* not requested one... */
		dev--;
		return -1;
	}
	pci_read_config_dword(pdev, PCI_COMMAND, &cmd);
	if (pci_enable_device(pdev)) {
		return -1;
	}

#ifdef CONFIG_FB_MATROX_MULTIHEAD
	minfo = (struct matrox_fb_info*)kmalloc(sizeof(*minfo), GFP_KERNEL);
	if (!minfo)
		return -1;
	d = (struct display*)kmalloc(size