src/soc/intel/common/block/scs/mmc.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <device/pci.h>
   4 #include <device/pci_ids.h>
   5 #include <console/console.h>
   6 #include <intelblocks/cfg.h>
   7 #include <intelblocks/mmc.h>
   8
   9 static int mmc_write_dll_reg(void *bar, uint32_t reg, uint32_t val)
  10 {
  11         int ret = 0;
  12         if (val) {
  13                 write32(bar + reg, val);
  14                 ret = 1;
  15         }
  16         return ret;
  17 }
  18
  19 int set_mmc_dll(void *bar)
  20 {
  21         const struct soc_intel_common_config *common_config;
  22         const struct mmc_dll_params *dll_params;
  23         int override = 0;
  24
  25         common_config = chip_get_common_soc_structure();
  26         dll_params = &common_config->emmc_dll;
  27
  28         override |= mmc_write_dll_reg(bar, EMMC_TX_CMD_CNTL_OFFSET,
  29                 dll_params->emmc_tx_cmd_cntl);
  30
  31         override |= mmc_write_dll_reg(bar, EMMC_TX_DATA_CNTL1_OFFSET,
  32                 dll_params->emmc_tx_data_cntl1);
  33
  34         override |= mmc_write_dll_reg(bar, EMMC_TX_DATA_CNTL2_OFFSET,
  35                 dll_params->emmc_tx_data_cntl2);
  36
  37         override |= mmc_write_dll_reg(bar, EMMC_RX_CMD_DATA_CNTL1_OFFSET,
  38                 dll_params->emmc_rx_cmd_data_cntl1);
  39
  40         override |= mmc_write_dll_reg(bar, EMMC_RX_STROBE_CNTL_OFFSET,
  41                 dll_params->emmc_rx_strobe_cntl);
  42
  43         override |= mmc_write_dll_reg(bar, EMMC_RX_CMD_DATA_CNTL2_OFFSET,
  44                 dll_params->emmc_rx_cmd_data_cntl2);
  45
  46         if (override == 0) {
  47                 printk(BIOS_INFO, "Skip Emmc dll value programming\n");
  48                 return -1;
  49         }
  50
  51         return 0;
  52 }
  53
  54 static void mmc_soc_init(struct device *dev)
  55 {
  56         const struct resource *res;
  57
  58         if (!CONFIG(SOC_INTEL_COMMON_MMC_OVERRIDE))
  59                 return;
  60
  61         res = find_resource(dev, PCI_BASE_ADDRESS_0);
  62         set_mmc_dll((void *)(uintptr_t)(res->base));
  63 }
  64
  65 static struct device_operations dev_ops = {
  66         .read_resources                 = pci_dev_read_resources,
  67         .set_resources                  = pci_dev_set_resources,
  68         .enable_resources               = pci_dev_enable_resources,
  69         .init                           = mmc_soc_init,
  70         .ops_pci                        = &pci_dev_ops_pci,
  71 };
  72
  73 static const unsigned short pci_device_ids[] = {
  74         PCI_DID_INTEL_CMP_EMMC,
  75         PCI_DID_INTEL_JSP_EMMC,
  76         PCI_DID_INTEL_ADP_EMMC,
  77         0
  78 };
  79
  80 static const struct pci_driver pch_sd __pci_driver = {
  81         .ops            = &dev_ops,
  82         .vendor         = PCI_VID_INTEL,
  83         .devices        = pci_device_ids,
  84 };