sd.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
 
#include "chip.h"
#include "hudson.h"
 
static void sd_init(struct device *dev)
{
        struct southbridge_amd_pi_hudson_config *sd_chip = dev->chip_info;
        u32 stepping = pci_read_config32(pcidev_on_root(0x18, 3), 0xFC);
        u8 sd_mode = 0;
 
        if (sd_chip)
                sd_mode = sd_chip->sd_mode;
 
        if (sd_mode == 3) {     /* SD 3.0 mode */
                pci_write_config32(dev, 0xA4, 0x31FEC8B2);
                pci_write_config32(dev, 0xA8, 0x00002503);
                pci_write_config32(dev, 0xB0, 0x02180C19);
                pci_write_config32(dev, 0xD0, 0x0000078B);
        }
        else {                          /* SD 2.0 mode */
                if ((stepping & 0x0000000F) == 0) {     /* Stepping A0 */
                        pci_write_config32(dev, 0xA4, 0x31DE32B2);
                        pci_write_config32(dev, 0xB0, 0x01180C19);
                        pci_write_config32(dev, 0xD0, 0x0000058B);
                }
                else {                                  /* Stepping >= A1 */
                        pci_write_config32(dev, 0xA4, 0x31FE32B2);
                        pci_write_config32(dev, 0xA8, 0x00000070);
                        pci_write_config32(dev, 0xB0, 0x01180C19);
                        pci_write_config32(dev, 0xD0, 0x0000078B);
                }
        }
}
 
static struct device_operations sd_ops = {
        .read_resources = pci_dev_read_resources,
        .set_resources = pci_dev_set_resources,
        .enable_resources = pci_dev_enable_resources,
        .init = sd_init,
};
 
static const struct pci_driver sd_driver __pci_driver = {
        .ops = &sd_ops,
        .vendor = PCI_VID_AMD,
        .device = PCI_DID_AMD_YANGTZE_SD,
};