mmc.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <device/pci.h>
#include <device/pci_ids.h>
#include <console/console.h>
#include <intelblocks/cfg.h>
#include <intelblocks/mmc.h>
 
static int mmc_write_dll_reg(void *bar, uint32_t reg, uint32_t val)
{
        int ret = 0;
        if (val) {
                write32(bar + reg, val);
                ret = 1;
        }
        return ret;
}
 
int set_mmc_dll(void *bar)
{
        const struct soc_intel_common_config *common_config;
        const struct mmc_dll_params *dll_params;
        int override = 0;
 
        common_config = chip_get_common_soc_structure();
        dll_params = &common_config->emmc_dll;
 
        override |= mmc_write_dll_reg(bar, EMMC_TX_CMD_CNTL_OFFSET,
                dll_params->emmc_tx_cmd_cntl);
 
        override |= mmc_write_dll_reg(bar, EMMC_TX_DATA_CNTL1_OFFSET,
                dll_params->emmc_tx_data_cntl1);
 
        override |= mmc_write_dll_reg(bar, EMMC_TX_DATA_CNTL2_OFFSET,
                dll_params->emmc_tx_data_cntl2);
 
        override |= mmc_write_dll_reg(bar, EMMC_RX_CMD_DATA_CNTL1_OFFSET,
                dll_params->emmc_rx_cmd_data_cntl1);
 
        override |= mmc_write_dll_reg(bar, EMMC_RX_STROBE_CNTL_OFFSET,
                dll_params->emmc_rx_strobe_cntl);
 
        override |= mmc_write_dll_reg(bar, EMMC_RX_CMD_DATA_CNTL2_OFFSET,
                dll_params->emmc_rx_cmd_data_cntl2);
 
        if (override == 0) {
                printk(BIOS_INFO, "Skip Emmc dll value programming\n");
                return -1;
        }
 
        return 0;
}
 
static void mmc_soc_init(struct device *dev)
{
        const struct resource *res;
 
        if (!CONFIG(SOC_INTEL_COMMON_MMC_OVERRIDE))
                return;
 
        res = find_resource(dev, PCI_BASE_ADDRESS_0);
        set_mmc_dll((void *)(uintptr_t)(res->base));
}
 
static struct device_operations dev_ops = {
        .read_resources                 = pci_dev_read_resources,
        .set_resources                  = pci_dev_set_resources,
        .enable_resources               = pci_dev_enable_resources,
        .init                           = mmc_soc_init,
        .ops_pci                        = &pci_dev_ops_pci,
};
 
static const unsigned short pci_device_ids[] = {
        PCI_DID_INTEL_CMP_EMMC,
        PCI_DID_INTEL_JSP_EMMC,
        PCI_DID_INTEL_ADP_EMMC,
        0
};
 
static const struct pci_driver pch_sd __pci_driver = {
        .ops            = &dev_ops,
        .vendor         = PCI_VID_INTEL,
        .devices        = pci_device_ids,
};