oxpcie.c

Go to the documentation of this file.

/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <device/device.h>
#include <device/pci_def.h>
#include <device/pci.h>
#include <console/console.h>
#include <console/uart.h>
#include <device/mmio.h>
#include <device/pci_ops.h>
 
static void oxford_oxpcie_enable(struct device *dev)
{
        printk(BIOS_DEBUG, "Initializing Oxford OXPCIe952\n");
 
        struct resource *res = probe_resource(dev, PCI_BASE_ADDRESS_0);
        if (!res) {
                printk(BIOS_WARNING, "OXPCIe952: No UART resource found.\n");
                return;
        }
        void *bar0 = res2mmio(res, 0, 0);
 
        printk(BIOS_DEBUG, "OXPCIe952: Class=%x Revision ID=%x\n",
                        (read32(bar0) >> 8), (read32(bar0) & 0xff));
        printk(BIOS_DEBUG, "OXPCIe952: %d UARTs detected.\n",
                        (read32(bar0 + 4) & 3));
        printk(BIOS_DEBUG, "OXPCIe952: UART BAR: 0x%x\n", (u32)res->base);
}
 
static void oxford_oxpcie_set_resources(struct device *dev)
{
        pci_dev_set_resources(dev);
 
        /* Re-initialize OXPCIe base address after set_resources */
        u32 mmio_base = pci_read_config32(dev, PCI_BASE_ADDRESS_0);
        oxford_remap(mmio_base & ~0xf);
}
 
static struct device_operations oxford_oxpcie_ops = {
        .read_resources   = pci_dev_read_resources,
        .set_resources    = oxford_oxpcie_set_resources,
        .enable_resources = pci_dev_enable_resources,
        .init             = oxford_oxpcie_enable,
};
 
static const struct pci_driver oxford_oxpcie_driver __pci_driver = {
        .ops    = &oxford_oxpcie_ops,
        .vendor = 0x1415,
        .device = 0xc158,
};
 
static const struct pci_driver oxford_oxpcie_driver_2 __pci_driver = {
        .ops    = &oxford_oxpcie_ops,
        .vendor = 0x1415,
        .device = 0xc11b,
};