arch/powerpc/platforms/fsl_uli1575.c

Source file repositories/reference/linux-study-clean/arch/powerpc/platforms/fsl_uli1575.c

File Facts

System
Linux kernel
Corpus path
arch/powerpc/platforms/fsl_uli1575.c
Extension
.c
Size
9549 bytes
Lines
380
Domain
Architecture Layer
Bucket
arch/powerpc
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

if (res && res->flags & IORESOURCE_MEM) {
			if (res->end == end)
				dummy = ioremap(res->start, 0x4);
			else
				dummy = ioremap(res->end - 3, 0x4);
			if (dummy) {
				in_8(dummy);
				iounmap(dummy);
			}
			break;
		}
	}
}

DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_AL, 0x5249, early_uli5249);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x1575, quirk_uli1575);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x5288, quirk_uli5288);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AL, 0x5229, quirk_uli5229);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, 0x5249, quirk_final_uli5249);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AL, 0x1575, quirk_final_uli1575);
DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_AL, 0x5229, quirk_uli5229);

static void hpcd_quirk_uli1575(struct pci_dev *dev)
{
	u32 temp32;

	if (!machine_is(mpc86xx_hpcd))
		return;

	/* Disable INTx */
	pci_read_config_dword(dev, 0x48, &temp32);
	pci_write_config_dword(dev, 0x48, (temp32 | 1<<26));

	/* Enable sideband interrupt */
	pci_read_config_dword(dev, 0x90, &temp32);
	pci_write_config_dword(dev, 0x90, (temp32 | 1<<22));
}

static void hpcd_quirk_uli5288(struct pci_dev *dev)
{
	unsigned char c;

	if (!machine_is(mpc86xx_hpcd))
		return;

	pci_read_config_byte(dev, 0x83, &c);
	c |= 0x80;
	pci_write_config_byte(dev, 0x83, c);

	pci_write_config_byte(dev, PCI_CLASS_PROG, 0x01);
	pci_write_config_byte(dev, PCI_CLASS_DEVICE, 0x06);

	pci_read_config_byte(dev, 0x83, &c);
	c &= 0x7f;
	pci_write_config_byte(dev, 0x83, c);
}

/*
 * Since 8259PIC was disabled on the board, the IDE device can not
 * use the legacy IRQ, we need to let the IDE device work under
 * native mode and use the interrupt line like other PCI devices.
 * IRQ14 is a sideband interrupt from IDE device to CPU and we use this
 * as the interrupt for IDE device.
 */
static void hpcd_quirk_uli5229(struct pci_dev *dev)
{
	unsigned char c;

	if (!machine_is(mpc86xx_hpcd))
		return;

	pci_read_config_byte(dev, 0x4b, &c);
	c |= 0x10;
	pci_write_config_byte(dev, 0x4b, c);
}

/*
 * SATA interrupt pin bug fix
 * There's a chip bug for 5288, The interrupt pin should be 2,
 * not the read only value 1, So it use INTB#, not INTA# which
 * actually used by the IDE device 5229.
 * As of this bug, during the PCI initialization, 5288 read the
 * irq of IDE device from the device tree, this function fix this
 * bug by re-assigning a correct irq to 5288.
 *
 */
static void hpcd_final_uli5288(struct pci_dev *dev)
{
	struct pci_controller *hose = pci_bus_to_host(dev->bus);
	struct device_node *hosenode = hose ? hose->dn : NULL;

Annotation

Implementation Notes