drivers/bcma/host_pci.c

Source file repositories/reference/linux-study-clean/drivers/bcma/host_pci.c

File Facts

System
Linux kernel
Corpus path
drivers/bcma/host_pci.c
Extension
.c
Size
9894 bytes
Lines
387
Domain
Driver Families
Bucket
drivers/bcma
Inferred role
Driver Families: operation-table or driver-model contract
Status
pattern implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

static struct pci_driver bcma_pci_bridge_driver = {
	.name = "bcma-pci-bridge",
	.id_table = bcma_pci_bridge_tbl,
	.probe = bcma_host_pci_probe,
	.remove = bcma_host_pci_remove,
	.driver.pm = BCMA_PM_OPS,
};

int __init bcma_host_pci_init(void)
{
	return pci_register_driver(&bcma_pci_bridge_driver);
}

void __exit bcma_host_pci_exit(void)
{
	pci_unregister_driver(&bcma_pci_bridge_driver);
}

/**************************************************
 * Runtime ops for drivers.
 **************************************************/

/* See also pcicore_up */
void bcma_host_pci_up(struct bcma_bus *bus)
{
	if (bus->hosttype != BCMA_HOSTTYPE_PCI)
		return;

	if (bus->host_is_pcie2)
		bcma_core_pcie2_up(&bus->drv_pcie2);
	else
		bcma_core_pci_up(&bus->drv_pci[0]);
}
EXPORT_SYMBOL_GPL(bcma_host_pci_up);

/* See also pcicore_down */
void bcma_host_pci_down(struct bcma_bus *bus)
{
	if (bus->hosttype != BCMA_HOSTTYPE_PCI)
		return;

	if (!bus->host_is_pcie2)
		bcma_core_pci_down(&bus->drv_pci[0]);
}
EXPORT_SYMBOL_GPL(bcma_host_pci_down);

/* See also si_pci_setup */
int bcma_host_pci_irq_ctl(struct bcma_bus *bus, struct bcma_device *core,
			  bool enable)
{
	struct pci_dev *pdev;
	u32 coremask, tmp;
	int err = 0;

	if (bus->hosttype != BCMA_HOSTTYPE_PCI) {
		/* This bcma device is not on a PCI host-bus. So the IRQs are
		 * not routed through the PCI core.
		 * So we must not enable routing through the PCI core. */
		goto out;
	}

	pdev = bus->host_pci;

	err = pci_read_config_dword(pdev, BCMA_PCI_IRQMASK, &tmp);
	if (err)
		goto out;

	coremask = BIT(core->core_index) << 8;
	if (enable)
		tmp |= coremask;
	else
		tmp &= ~coremask;

	err = pci_write_config_dword(pdev, BCMA_PCI_IRQMASK, tmp);

out:
	return err;
}
EXPORT_SYMBOL_GPL(bcma_host_pci_irq_ctl);

Annotation

Implementation Notes