ti_pci7xx1.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <stdint.h>
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ops.h>
#include <device/cardbus.h>
 
static void pci7xx1_enable(struct device *const dev)
{
        printk(BIOS_DEBUG, "%s: TI PCI7xx1 media controller\n", __func__);
        if (PCI_FUNC(dev->path.pci.devfn) == 0) {
                const unsigned int slot = PCI_SLOT(dev->path.pci.devfn);
 
                int fn;
 
                /* Hide functions based on devicetree info. */
                u16 gcr = pci_read_config16(dev, 0x86);
                for (fn = 5; fn > 0; --fn) {
                        const struct device *const d =
                                pcidev_path_behind(dev->bus, PCI_DEVFN(slot, fn));
                        if (!d || d->enabled) continue;
                        printk(BIOS_DEBUG,
                                "%s: Hiding function #%d.\n", __func__, fn);
                        switch (fn) {
                                case 1: gcr |= 1 << 4; break; /* CardBus B */
                                case 2: gcr |= 1 << 3; break; /* OHCI 1394 */
                                case 3: gcr |= 1 << 5; break; /* Flash media */
                                case 4: gcr |= 1 << 6; break; /* SD card */
                                case 5: gcr |= 1 << 7; break; /* Smart Card */
                        }
                }
                pci_write_config16(dev, 0x86, gcr);
        }
}
 
static struct device_operations device_ops = {
        .read_resources         = cardbus_read_resources,
        .set_resources          = pci_dev_set_resources,
        .enable_resources       = cardbus_enable_resources,
        .init                   = 0,
        .scan_bus               = pci_scan_bridge,
        .enable                 = pci7xx1_enable,
        .reset_bus              = pci_bus_reset,
};
 
static const struct pci_driver ti_pci7xx1 __pci_driver = {
        .ops    = &device_ops,
        .vendor = 0x104c,
        .device = 0x8031,
};