cyber2000fb.c

linux 内核源代码

	EXT_OVERSCAN_GREEN,	0,
	EXT_OVERSCAN_BLUE,	0,

	/* some of these are questionable when we have a BIOS */
	EXT_MEM_CTL0,		EXT_MEM_CTL0_7CLK |
				EXT_MEM_CTL0_RAS_1 |
				EXT_MEM_CTL0_MULTCAS,
	EXT_HIDDEN_CTL1,	0x30,
	EXT_FIFO_CTL,		0x0b,
	EXT_FIFO_CTL + 1,	0x17,
	0x76,			0x00,
	EXT_HIDDEN_CTL4,	0xc8
};

/*
 * Initialise the CyberPro hardware.  On the CyberPro5XXXX,
 * ensure that we're using the correct PLL (5XXX's may be
 * programmed to use an additional set of PLLs.)
 */
static void cyberpro_init_hw(struct cfb_info *cfb)
{
	int i;

	for (i = 0; i < sizeof(igs_regs); i += 2)
		cyber2000_grphw(igs_regs[i], igs_regs[i + 1], cfb);

	if (cfb->id == ID_CYBERPRO_5000) {
		unsigned char val;
		cyber2000fb_writeb(0xba, 0x3ce, cfb);
		val = cyber2000fb_readb(0x3cf, cfb) & 0x80;
		cyber2000fb_writeb(val, 0x3cf, cfb);
	}
}

static struct cfb_info __devinit *cyberpro_alloc_fb_info(unsigned int id,
							 char *name)
{
	struct cfb_info *cfb;

	cfb = kzalloc(sizeof(struct cfb_info), GFP_KERNEL);
	if (!cfb)
		return NULL;


	cfb->id			= id;

	if (id == ID_CYBERPRO_5000)
		cfb->ref_ps	= 40690; /* 24.576 MHz */
	else
		cfb->ref_ps	= 69842; /* 14.31818 MHz (69841?) */

	cfb->divisors[0]	= 1;
	cfb->divisors[1]	= 2;
	cfb->divisors[2]	= 4;

	if (id == ID_CYBERPRO_2000)
		cfb->divisors[3] = 8;
	else
		cfb->divisors[3] = 6;

	strcpy(cfb->fb.fix.id, name);

	cfb->fb.fix.type	= FB_TYPE_PACKED_PIXELS;
	cfb->fb.fix.type_aux	= 0;
	cfb->fb.fix.xpanstep	= 0;
	cfb->fb.fix.ypanstep	= 1;
	cfb->fb.fix.ywrapstep	= 0;

	switch (id) {
	case ID_IGA_1682:
		cfb->fb.fix.accel = 0;
		break;

	case ID_CYBERPRO_2000:
		cfb->fb.fix.accel = FB_ACCEL_IGS_CYBER2000;
		break;

	case ID_CYBERPRO_2010:
		cfb->fb.fix.accel = FB_ACCEL_IGS_CYBER2010;
		break;

	case ID_CYBERPRO_5000:
		cfb->fb.fix.accel = FB_ACCEL_IGS_CYBER5000;
		break;
	}

	cfb->fb.var.nonstd	= 0;
	cfb->fb.var.activate	= FB_ACTIVATE_NOW;
	cfb->fb.var.height	= -1;
	cfb->fb.var.width	= -1;
	cfb->fb.var.accel_flags	= FB_ACCELF_TEXT;

	cfb->fb.fbops		= &cyber2000fb_ops;
	cfb->fb.flags		= FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
	cfb->fb.pseudo_palette	= cfb->pseudo_palette;

	fb_alloc_cmap(&cfb->fb.cmap, NR_PALETTE, 0);

	return cfb;
}

static void cyberpro_free_fb_info(struct cfb_info *cfb)
{
	if (cfb) {
		/*
		 * Free the colourmap
		 */
		fb_alloc_cmap(&cfb->fb.cmap, 0, 0);

		kfree(cfb);
	}
}

/*
 * Parse Cyber2000fb options.  Usage:
 *  video=cyber2000:font:fontname
 */
#ifndef MODULE
static int cyber2000fb_setup(char *options)
{
	char *opt;

	if (!options || !*options)
		return 0;

	while ((opt = strsep(&options, ",")) != NULL) {
		if (!*opt)
			continue;

		if (strncmp(opt, "font:", 5) == 0) {
			static char default_font_storage[40];

			strlcpy(default_font_storage, opt + 5,
				sizeof(default_font_storage));
			default_font = default_font_storage;
			continue;
		}

		printk(KERN_ERR "CyberPro20x0: unknown parameter: %s\n", opt);
	}
	return 0;
}
#endif  /*  MODULE  */

/*
 * The CyberPro chips can be placed on many different bus types.
 * This probe function is common to all bus types.  The bus-specific
 * probe function is expected to have:
 *  - enabled access to the linear memory region
 *  - memory mapped access to the registers
 *  - initialised mem_ctl1 and mem_ctl2 appropriately.
 */
static int __devinit cyberpro_common_probe(struct cfb_info *cfb)
{
	u_long smem_size;
	u_int h_sync, v_sync;
	int err;

	cyberpro_init_hw(cfb);

	/*
	 * Get the video RAM size and width from the VGA register.
	 * This should have been already initialised by the BIOS,
	 * but if it's garbage, claim default 1MB VRAM (woody)
	 */
	cfb->mem_ctl1 = cyber2000_grphr(EXT_MEM_CTL1, cfb);
	cfb->mem_ctl2 = cyber2000_grphr(EXT_MEM_CTL2, cfb);

	/*
	 * Determine the size of the memory.
	 */
	switch (cfb->mem_ctl2 & MEM_CTL2_SIZE_MASK) {
	case MEM_CTL2_SIZE_4MB:
		smem_size = 0x00400000;
		break;
	case MEM_CTL2_SIZE_2MB:
		smem_size = 0x00200000;
		break;
	case MEM_CTL2_SIZE_1MB:
		smem_size = 0x00100000;
		break;
	default:
		smem_size = 0x00100000;
		break;
	}

	cfb->fb.fix.smem_len   = smem_size;
	cfb->fb.fix.mmio_len   = MMIO_SIZE;
	cfb->fb.screen_base    = cfb->region;

	err = -EINVAL;
	if (!fb_find_mode(&cfb->fb.var, &cfb->fb, NULL, NULL, 0,
			  &cyber2000fb_default_mode, 8)) {
		printk(KERN_ERR "%s: no valid mode found\n", cfb->fb.fix.id);
		goto failed;
	}

	cfb->fb.var.yres_virtual = cfb->fb.fix.smem_len * 8 /
			(cfb->fb.var.bits_per_pixel * cfb->fb.var.xres_virtual);

	if (cfb->fb.var.yres_virtual < cfb->fb.var.yres)
		cfb->fb.var.yres_virtual = cfb->fb.var.yres;

/*	fb_set_var(&cfb->fb.var, -1, &cfb->fb); */

	/*
	 * Calculate the hsync and vsync frequencies.  Note that
	 * we split the 1e12 constant up so that we can preserve
	 * the precision and fit the results into 32-bit registers.
	 *  (1953125000 * 512 = 1e12)
	 */
	h_sync = 1953125000 / cfb->fb.var.pixclock;
	h_sync = h_sync * 512 / (cfb->fb.var.xres + cfb->fb.var.left_margin +
		 cfb->fb.var.right_margin + cfb->fb.var.hsync_len);
	v_sync = h_sync / (cfb->fb.var.yres + cfb->fb.var.upper_margin +
		 cfb->fb.var.lower_margin + cfb->fb.var.vsync_len);

	printk(KERN_INFO "%s: %dKiB VRAM, using %dx%d, %d.%03dkHz, %dHz\n",
		cfb->fb.fix.id, cfb->fb.fix.smem_len >> 10,
		cfb->fb.var.xres, cfb->fb.var.yres,
		h_sync / 1000, h_sync % 1000, v_sync);

	if (cfb->dev)
		cfb->fb.device = &cfb->dev->dev;
	err = register_framebuffer(&cfb->fb);

failed:
	return err;
}

static void cyberpro_common_resume(struct cfb_info *cfb)
{
	cyberpro_init_hw(cfb);

	/*
	 * Reprogram the MEM_CTL1 and MEM_CTL2 registers
	 */
	cyber2000_grphw(EXT_MEM_CTL1, cfb->mem_ctl1, cfb);
	cyber2000_grphw(EXT_MEM_CTL2, cfb->mem_ctl2, cfb);

	/*
	 * Restore the old video mode and the palette.
	 * We also need to tell fbcon to redraw the console.
	 */
	cyber2000fb_set_par(&cfb->fb);
}

#ifdef CONFIG_ARCH_SHARK

#include <asm/arch/hardware.h>

static int __devinit cyberpro_vl_probe(void)
{
	struct cfb_info *cfb;
	int err = -ENOMEM;

	if (!request_mem_region(FB_START, FB_SIZE, "CyberPro2010"))
		return err;

	cfb = cyberpro_alloc_fb_info(ID_CYBERPRO_2010, "CyberPro2010");
	if (!cfb)
		goto failed_release;

	cfb->dev = NULL;
	cfb->region = ioremap(FB_START, FB_SIZE);
	if (!cfb->region)
		goto failed_ioremap;

	cfb->regs = cfb->region + MMIO_OFFSET;
	cfb->fb.fix.mmio_start = FB_START + MMIO_OFFSET;
	cfb->fb.fix.smem_start = FB_START;

	/*
	 * Bring up the hardware.  This is expected to enable access
	 * to the linear memory region, and allow access to the memory
	 * mapped registers.  Also, mem_ctl1 and mem_ctl2 must be
	 * initialised.
	 */
	cyber2000fb_writeb(0x18, 0x46e8, cfb);
	cyber2000fb_writeb(0x01, 0x102, cfb);
	cyber2000fb_writeb(0x08, 0x46e8, cfb);
	cyber2000fb_writeb(EXT_BIU_MISC, 0x3ce, cfb);
	cyber2000fb_writeb(EXT_BIU_MISC_LIN_ENABLE, 0x3cf, cfb);

	cfb->mclk_mult = 0xdb;
	cfb->mclk_div  = 0x54;

	err = cyberpro_common_probe(cfb);
	if (err)
		goto failed;

	if (int_cfb_info == NULL)
		int_cfb_info = cfb;

	return 0;

failed:
	iounmap(cfb->region);
failed_ioremap:
	cyberpro_free_fb_info(cfb);
failed_release:
	release_mem_region(FB_START, FB_SIZE);

	return err;
}
#endif /* CONFIG_ARCH_SHARK */

/*
 * PCI specific support.
 */
#ifdef CONFIG_PCI
/*
 * We need to wake up the CyberPro, and make sure its in linear memory
 * mode.  Unfortunately, this is specific to the platform and card that
 * we are running on.
 *
 * On x86 and ARM, should we be initialising the CyberPro first via the
 * IO registers, and then the MMIO registers to catch all cases?  Can we
 * end up in the situation where the chip is in MMIO mode, but not awake
 * on an x86 system?
 */
static int cyberpro_pci_enable_mmio(struct cfb_info *cfb)
{
	unsigned char val;

#if defined(__sparc_v9__)
#error "You lose, consult DaveM."
#elif defined(__sparc__)
	/*
	 * SPARC does not have an "outb" instruction, so we generate
	 * I/O cycles storing into a reserved memory space at
	 * physical address 0x3000000
	 */
	unsigned char __iomem *iop;

	iop = ioremap(0x3000000, 0x5000);
	if (iop == NULL) {
		prom_printf("iga5000: cannot map I/O\n");
		return -ENOMEM;
	}

	writeb(0x18, iop + 0x46e8);
	writeb(0x01, iop + 0x102);
	writeb(0x08, iop + 0x46e8);
	writeb(EXT_BIU_MISC, iop + 0x3ce);
	writeb(EXT_BIU_MISC_LIN_ENABLE, iop + 0x3cf);

	iounmap(iop);
#else
	/*
	 * Most other machine types are "normal", so
	 * we use the standard IO-based wakeup.
	 */
	outb(0x18, 0x46e8);
	outb(0x01, 0x102);
	outb(0x08, 0x46e8);
	outb(EXT_BIU_MISC, 0x3ce);
	outb(EXT_BIU_MISC_LIN_ENABLE, 0x3cf);
#endif

	/*
	 * Allow the CyberPro to accept PCI burst accesses
	 */
	if (cfb->id == ID_CYBERPRO_2010) {
		printk(KERN_INFO "%s: NOT enabling PCI bursts\n",
		       cfb->fb.fix.id);
	} else {
		val = cyber2000_grphr(EXT_BUS_CTL, cfb);
		if (!(val & EXT_BUS_CTL_PCIBURST_WRITE)) {
			printk(KERN_INFO "%s: enabling PCI bursts\n",
				cfb->fb.fix.id);

			val |= EXT_BUS_CTL_PCIBURST_WRITE;

			if (cfb->id == ID_CYBERPRO_5000)
				val |= EXT_BUS_CTL_PCIBURST_READ;

			cyber2000_grphw(EXT_BUS_CTL, val, cfb);
		}
	}

	return 0;
}

static int __devinit
cyberpro_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
{
	struct cfb_info *cfb;
	char name[16];
	int err;

	sprintf(name, "CyberPro%4X", id->device);

	err = pci_enable_device(dev);
	if (err)
		return err;

	err = pci_request_regions(dev, name);
	if (err)
		return err;

	err = -ENOMEM;
	cfb = cyberpro_alloc_fb_info(id->driver_data, name);
	if (!cfb)
		goto failed_release;

	cfb->dev = dev;
	cfb->region = ioremap(pci_resource_start(dev, 0),
			      pci_resource_len(dev, 0));
	if (!cfb->region)
		goto failed_ioremap;

	cfb->regs = cfb->region + MMIO_OFFSET;
	cfb->fb.fix.mmio_start = pci_resource_start(dev, 0) + MMIO_OFFSET;
	cfb->fb.fix.smem_start = pci_resource_start(dev, 0);

	/*
	 * Bring up the hardware.  This is expected to enable access
	 * to the linear memory region, and allow access to the memory
	 * mapped registers.  Also, mem_ctl1 and mem_ctl2 must be
	 * initialised.
	 */
	err = cyberpro_pci_enable_mmio(cfb);
	if (err)
		goto failed;

	/*
	 * Use MCLK from BIOS. FIXME: what about hotplug?
	 */
	cfb->mclk_mult = cyber2000_grphr(EXT_MCLK_MULT, cfb);
	cfb->mclk_div  = cyber2000_grphr(EXT_MCLK_DIV, cfb);

#ifdef __arm__
	/*
	 * MCLK on the NetWinder and the Shark is fixed at 75MHz
	 */
	if (machine_is_netwinder()) {
		cfb->mclk_mult = 0xdb;
		cfb->mclk_div  = 0x54;
	}
#endif

	err = cyberpro_common_probe(cfb);
	if (err)
		goto failed;

	/*
	 * Our driver data
	 */
	pci_set_drvdata(dev, cfb);
	if (int_cfb_info == NULL)
		int_cfb_info = cfb;

	return 0;

failed:
	iounmap(cfb->region);
failed_ioremap:
	cyberpro_free_fb_info(cfb);
failed_release:
	pci_release_regions(dev);

	return err;
}

static void __devexit cyberpro_pci_remove(struct pci_dev *dev)
{
	struct cfb_info *cfb = pci_get_drvdata(dev);

	if (cfb) {
		/*
		 * If unregister_framebuffer fails, then
		 * we will be leaving hooks that could cause
		 * oopsen laying around.
		 */
		if (unregister_framebuffer(&cfb->fb))
			printk(KERN_WARNING "%s: danger Will Robinson, "
				"danger danger!  Oopsen imminent!\n",
				cfb->fb.fix.id);
		iounmap(cfb->region);
		cyberpro_free_fb_info(cfb);

		/*
		 * Ensure that the driver data is no longer
		 * valid.
		 */
		pci_set_drvdata(dev, NULL);
		if (cfb == int_cfb_info)
			int_cfb_info = NULL;

		pci_release_regions(dev);
	}
}

static int cyberpro_pci_suspend(struct pci_dev *dev, pm_message_t state)
{
	return 0;
}

/*
 * Re-initialise the CyberPro hardware
 */
static int cyberpro_pci_resume(struct pci_dev *dev)
{
	struct cfb_info *cfb = pci_get_drvdata(dev);

	if (cfb) {
		cyberpro_pci_enable_mmio(cfb);
		cyberpro_common_resume(cfb);
	}

	return 0;
}

static struct pci_device_id cyberpro_pci_table[] = {
/*	Not yet
 *	{ PCI_VENDOR_ID_INTERG, PCI_DEVICE_ID_INTERG_1682,
 *		PCI_ANY_ID, PCI_ANY_ID, 0, 0, ID_IGA_1682 },
 */
	{ PCI_VENDOR_ID_INTERG, PCI_DEVICE_ID_INTERG_2000,
		PCI_ANY_ID, PCI_ANY_ID, 0, 0, ID_CYBERPRO_2000 },
	{ PCI_VENDOR_ID_INTERG, PCI_DEVICE_ID_INTERG_2010,
		PCI_ANY_ID, PCI_ANY_ID, 0, 0, ID_CYBERPRO_2010 },
	{ PCI_VENDOR_ID_INTERG, PCI_DEVICE_ID_INTERG_5000,
		PCI_ANY_ID, PCI_ANY_ID, 0, 0, ID_CYBERPRO_5000 },
	{ 0, }
};

MODULE_DEVICE_TABLE(pci, cyberpro_pci_table);

static struct pci_driver cyberpro_driver = {
	.name		= "CyberPro",
	.probe		= cyberpro_pci_probe,
	.remove		= __devexit_p(cyberpro_pci_remove),
	.suspend	= cyberpro_pci_suspend,
	.resume		= cyberpro_pci_resume,
	.id_table	= cyberpro_pci_table
};
#endif

/*
 * I don't think we can use the "module_init" stuff here because
 * the fbcon stuff may not be initialised yet.  Hence the #ifdef
 * around module_init.
 *
 * Tony: "module_init" is now required
 */
static int __init cyber2000fb_init(void)
{
	int ret = -1, err;

#ifndef MODULE
	char *option = NULL;

	if (fb_get_options("cyber2000fb", &option))
		return -ENODEV;
	cyber2000fb_setup(option);
#endif

#ifdef CONFIG_ARCH_SHARK
	err = cyberpro_vl_probe();
	if (!err) {
		ret = 0;
		__module_get(THIS_MODULE);
	}
#endif
#ifdef CONFIG_PCI
	err = pci_register_driver(&cyberpro_driver);
	if (!err)
		ret = 0;
#endif

	return ret ? err : 0;
}

static void __exit cyberpro_exit(void)
{
	pci_unregister_driver(&cyberpro_driver);
}

module_init(cyber2000fb_init);
module_exit(cyberpro_exit);

MODULE_AUTHOR("Russell King");
MODULE_DESCRIPTION("CyberPro 2000, 2010 and 5000 framebuffer driver");
MODULE_LICENSE("GPL");