dino.c

来自「Linux Kernel 2.6.9 for OMAP1710」· C语言 代码 · 共 1,078 行 · 第 1/3 页

	gsc_writel(0x00222222, dino_dev->hba.base_addr+DINO_PCIROR);
	gsc_writel(0x00222222, dino_dev->hba.base_addr+DINO_PCIWOR);

	gsc_writel(0x00000040, dino_dev->hba.base_addr+DINO_MLTIM);
	gsc_writel(0x00000080, dino_dev->hba.base_addr+DINO_IO_CONTROL);
	gsc_writel(0x0000008c, dino_dev->hba.base_addr+DINO_TLTIM);

	/* Disable PAMR before writing PAPR */
	gsc_writel(0x0000007e, dino_dev->hba.base_addr+DINO_PAMR);
	gsc_writel(0x0000007f, dino_dev->hba.base_addr+DINO_PAPR);
	gsc_writel(0x00000000, dino_dev->hba.base_addr+DINO_PAMR);

	/*
	** Dino ERS encourages enabling FBB (0x6f).
	** We can't until we know *all* devices below us can support it.
	** (Something in device configuration header tells us).
	*/
	gsc_writel(0x0000004f, dino_dev->hba.base_addr+DINO_PCICMD);

	/* Somewhere, the PCI spec says give devices 1 second
	** to recover from the #RESET being de-asserted.
	** Experience shows most devices only need 10ms.
	** This short-cut speeds up booting significantly.
	*/
	mdelay(pci_post_reset_delay);
}

static int __init
dino_bridge_init(struct dino_device *dino_dev, const char *name)
{
	unsigned long io_addr;
	int result, i, count=0;
	struct resource *res, *prevres = NULL;
	/*
	 * Decoding IO_ADDR_EN only works for Built-in Dino
	 * since PDC has already initialized this.
	 */

	io_addr = gsc_readl(dino_dev->hba.base_addr + DINO_IO_ADDR_EN);
	if (io_addr == 0) {
		printk(KERN_WARNING "%s: No PCI devices enabled.\n", name);
		return -ENODEV;
	}

	res = &dino_dev->hba.lmmio_space;
	for (i = 0; i < 32; i++) {
		unsigned long start, end;

		if((io_addr & (1 << i)) == 0)
			continue;

		start = (unsigned long)(signed int)(0xf0000000 | (i << 23));
		end = start + 8 * 1024 * 1024 - 1;

		DBG("DINO RANGE %d is at 0x%lx-0x%lx\n", count,
		    start, end);

		if(prevres && prevres->end + 1 == start) {
			prevres->end = end;
		} else {
			if(count >= DINO_MAX_LMMIO_RESOURCES) {
				printk(KERN_ERR "%s is out of resource windows for range %d (0x%lx-0x%lx)\n", name, count, start, end);
				break;
			}
			prevres = res;
			res->start = start;
			res->end = end;
			res->flags = IORESOURCE_MEM;
			res->name = kmalloc(64, GFP_KERNEL);
			if(res->name)
				snprintf((char *)res->name, 64, "%s LMMIO %d",
					 name, count);
			res++;
			count++;
		}
	}

	res = &dino_dev->hba.lmmio_space;

	for(i = 0; i < DINO_MAX_LMMIO_RESOURCES; i++) {
		if(res[i].flags == 0)
			break;

		result = ccio_request_resource(dino_dev->hba.dev, &res[i]);
		if (result < 0) {
			printk(KERN_ERR "%s: failed to claim PCI Bus address space %d (0x%lx-0x%lx)!\n", name, i, res[i].start, res[i].end);
			return result;
		}
	}
	return 0;
}

static int __init dino_common_init(struct parisc_device *dev,
		struct dino_device *dino_dev, const char *name)
{
	int status;
	u32 eim;
	struct gsc_irq gsc_irq;
	struct resource *res;

	pcibios_register_hba(&dino_dev->hba);

	pci_bios = &dino_bios_ops;   /* used by pci_scan_bus() */
	pci_port = &dino_port_ops;

	/*
	** Note: SMP systems can make use of IRR1/IAR1 registers
	**   But it won't buy much performance except in very
	**   specific applications/configurations. Note Dino
	**   still only has 11 IRQ input lines - just map some of them
	**   to a different processor.
	*/
	dino_dev->irq = gsc_alloc_irq(&gsc_irq);
	dino_dev->txn_addr = gsc_irq.txn_addr;
	dino_dev->txn_data = gsc_irq.txn_data;
	eim = ((u32) gsc_irq.txn_addr) | gsc_irq.txn_data;

	/* 
	** Dino needs a PA "IRQ" to get a processor's attention.
	** arch/parisc/kernel/irq.c returns an EIRR bit.
	*/
	if (dino_dev->irq < 0) {
		printk(KERN_WARNING "%s: gsc_alloc_irq() failed\n", name);
		return 1;
	}

	status = request_irq(dino_dev->irq, dino_isr, 0, name, dino_dev);
	if (status) {
		printk(KERN_WARNING "%s: request_irq() failed with %d\n", 
			name, status);
		return 1;
	}

	/*
	** Tell generic interrupt support we have 11 bits which need
	** be checked in the interrupt handler.
	*/
	dino_dev->dino_region = alloc_irq_region(DINO_IRQS, &dino_irq_ops,
						name, dino_dev);

	if (NULL == dino_dev->dino_region) {
		printk(KERN_WARNING "%s: alloc_irq_region() failed\n", name);
		return 1;
	}

	/* Support the serial port which is sometimes attached on built-in
	 * Dino / Cujo chips.
	 */

	fixup_child_irqs(dev, dino_dev->dino_region->data.irqbase,
			dino_choose_irq);

	/*
	** This enables DINO to generate interrupts when it sees
	** any of its inputs *change*. Just asserting an IRQ
	** before it's enabled (ie unmasked) isn't good enough.
	*/
	gsc_writel(eim, dino_dev->hba.base_addr+DINO_IAR0);

	/*
	** Some platforms don't clear Dino's IRR0 register at boot time.
	** Reading will clear it now.
	*/
	gsc_readl(dino_dev->hba.base_addr+DINO_IRR0);

	/* allocate I/O Port resource region */
	res = &dino_dev->hba.io_space;
	if (dev->id.hversion == 0x680 || is_card_dino(&dev->id)) {
		res->name = "Dino I/O Port";
	} else {
		res->name = "Cujo I/O Port";
	}
	res->start = HBA_PORT_BASE(dino_dev->hba.hba_num);
	res->end = res->start + (HBA_PORT_SPACE_SIZE - 1);
	res->flags = IORESOURCE_IO; /* do not mark it busy ! */
	if (request_resource(&ioport_resource, res) < 0) {
		printk(KERN_ERR "%s: request I/O Port region failed 0x%lx/%lx (hpa 0x%lx)\n",
				name, res->start, res->end, dino_dev->hba.base_addr);
		return 1;
	}

	return 0;
}

#define CUJO_RAVEN_ADDR		F_EXTEND(0xf1000000UL)
#define CUJO_FIREHAWK_ADDR	F_EXTEND(0xf1604000UL)
#define CUJO_RAVEN_BADPAGE	0x01003000UL
#define CUJO_FIREHAWK_BADPAGE	0x01607000UL

static const char *dino_vers[] = {
	"2.0",
	"2.1",
	"3.0",
	"3.1"
};

static const char *cujo_vers[] = {
	"1.0",
	"2.0"
};

void ccio_cujo20_fixup(struct parisc_device *dev, u32 iovp);

/*
** Determine if dino should claim this chip (return 0) or not (return 1).
** If so, initialize the chip appropriately (card-mode vs bridge mode).
** Much of the initialization is common though.
*/
static int __init
dino_driver_callback(struct parisc_device *dev)
{
	struct dino_device *dino_dev;	// Dino specific control struct
	const char *version = "unknown";
	const int name_len = 32;
	char hw_path[64];
	char *name;
	int is_cujo = 0;
	struct pci_bus *bus;
	
	name = kmalloc(name_len, GFP_KERNEL);
	if(name) {
		print_pa_hwpath(dev, hw_path);
		snprintf(name, name_len, "Dino [%s]", hw_path);
	} 
	else
		name = "Dino";

	if (is_card_dino(&dev->id)) {
		version = "3.x (card mode)";
	} else {
		if(dev->id.hversion == 0x680) {
			if (dev->id.hversion_rev < 4) {
				version = dino_vers[dev->id.hversion_rev];
			}
		} else {
			name = "Cujo";
			is_cujo = 1;
			if (dev->id.hversion_rev < 2) {
				version = cujo_vers[dev->id.hversion_rev];
			}
		}
	}

	printk("%s version %s found at 0x%lx\n", name, version, dev->hpa);

	if (!request_mem_region(dev->hpa, PAGE_SIZE, name)) {
		printk(KERN_ERR "DINO: Hey! Someone took my MMIO space (0x%ld)!\n",
			dev->hpa);
		return 1;
	}

	/* Check for bugs */
	if (is_cujo && dev->id.hversion_rev == 1) {
#ifdef CONFIG_IOMMU_CCIO
		printk(KERN_WARNING "Enabling Cujo 2.0 bug workaround\n");
		if (dev->hpa == (unsigned long)CUJO_RAVEN_ADDR) {
			ccio_cujo20_fixup(dev->parent, CUJO_RAVEN_BADPAGE);
		} else if (dev->hpa == (unsigned long)CUJO_FIREHAWK_ADDR) {
			ccio_cujo20_fixup(dev->parent, CUJO_FIREHAWK_BADPAGE);
		} else {
			printk("Don't recognise Cujo at address 0x%lx, not enabling workaround\n", dev->hpa);
		}
#endif
	} else if (!is_cujo && !is_card_dino(&dev->id) &&
			dev->id.hversion_rev < 3) {
		printk(KERN_WARNING
"The GSCtoPCI (Dino hrev %d) bus converter found may exhibit\n"
"data corruption.  See Service Note Numbers: A4190A-01, A4191A-01.\n"
"Systems shipped after Aug 20, 1997 will not exhibit this problem.\n"
"Models affected: C180, C160, C160L, B160L, and B132L workstations.\n\n",
			dev->id.hversion_rev);
/* REVISIT: why are C200/C240 listed in the README table but not
**   "Models affected"? Could be an omission in the original literature.
*/
	}

	dino_dev = kmalloc(sizeof(struct dino_device), GFP_KERNEL);
	if (!dino_dev) {
		printk("dino_init_chip - couldn't alloc dino_device\n");
		return 1;
	}

	memset(dino_dev, 0, sizeof(struct dino_device));

	dino_dev->hba.dev = dev;
	dino_dev->hba.base_addr = dev->hpa;  /* faster access */
	dino_dev->hba.lmmio_space_offset = 0;	/* CPU addrs == bus addrs */
	dino_dev->dinosaur_pen = SPIN_LOCK_UNLOCKED;
	dino_dev->hba.iommu = ccio_get_iommu(dev);

	if (is_card_dino(&dev->id)) {
		dino_card_init(dino_dev);
	} else {
		dino_bridge_init(dino_dev, name);
	}

	if (dino_common_init(dev, dino_dev, name))
		return 1;

	dev->dev.platform_data = dino_dev;

	/*
	** It's not used to avoid chicken/egg problems
	** with configuration accessor functions.
	*/
	bus = pci_scan_bus_parented(&dev->dev, dino_current_bus,
				    &dino_cfg_ops, NULL);
	if(bus) {
		/* This code *depends* on scanning being single threaded
		 * if it isn't, this global bus number count will fail
		 */
		dino_current_bus = bus->subordinate + 1;
		pci_bus_assign_resources(bus);
	} else {
		printk(KERN_ERR "ERROR: failed to scan PCI bus on %s (probably duplicate bus number %d)\n", dev->dev.bus_id, dino_current_bus);
		/* increment the bus number in case of duplicates */
		dino_current_bus++;
	}
	dino_dev->hba.hba_bus = bus;
	return 0;
}

/*
 * Normally, we would just test sversion.  But the Elroy PCI adapter has
 * the same sversion as Dino, so we have to check hversion as well.
 * Unfortunately, the J2240 PDC reports the wrong hversion for the first
 * Dino, so we have to test for Dino, Cujo and Dino-in-a-J2240.
 * For card-mode Dino, most machines report an sversion of 9D.  But 715
 * and 725 firmware misreport it as 0x08080 for no adequately explained
 * reason.
 */
static struct parisc_device_id dino_tbl[] = {
	{ HPHW_A_DMA, HVERSION_REV_ANY_ID, 0x004, 0x0009D },/* Card-mode Dino */
	{ HPHW_A_DMA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x08080 }, /* XXX */
	{ HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x680, 0xa }, /* Bridge-mode Dino */
	{ HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x682, 0xa }, /* Bridge-mode Cujo */
	{ HPHW_BRIDGE, HVERSION_REV_ANY_ID, 0x05d, 0xa }, /* Dino in a J2240 */
	{ 0, }
};

static struct parisc_driver dino_driver = {
	.name =		"Dino",
	.id_table =	dino_tbl,
	.probe =	dino_driver_callback,
};

/*
 * One time initialization to let the world know Dino is here.
 * This is the only routine which is NOT static.
 * Must be called exactly once before pci_init().
 */
int __init dino_init(void)
{
	register_parisc_driver(&dino_driver);
	return 0;
}