src/soc/intel/baytrail/emmc.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <console/console.h>
   4 #include <device/device.h>
   5 #include <device/pci.h>
   6 #include <device/pci_ids.h>
   7 #include <reg_script.h>
   8
   9 #include <soc/device_nvs.h>
  10 #include <soc/iosf.h>
  11 #include <soc/pci_devs.h>
  12 #include <soc/ramstage.h>
  13 #include "chip.h"
  14
  15 static const struct reg_script emmc_ops[] = {
  16         /* Enable 2ms card stable feature. */
  17         REG_PCI_OR32(0xa8, (1 << 24)),
  18         /* Enable HS200 */
  19         REG_PCI_WRITE32(0xa0, 0x446cc801),
  20         REG_PCI_WRITE32(0xa4, 0x80000807),
  21         /* cfio_regs_score_special_bits.sdio1_dummy_loopback_en=1 */
  22         REG_IOSF_OR(IOSF_PORT_SCORE, 0x49c0, (1 << 3)),
  23         /* CLKGATE_EN_1 . cr_scc_mipihsi_clkgate_en  = 1 */
  24         REG_IOSF_RMW(IOSF_PORT_CCU, 0x1c, ~(3 << 26), (1 << 26)),
  25         /* Set slew for HS200 */
  26         REG_IOSF_RMW(IOSF_PORT_SCORE, 0x48c0, ~0x3c, 0x3c),
  27         REG_IOSF_RMW(IOSF_PORT_SCORE, 0x48c4, ~0x3c, 0x3c),
  28         /* Max timeout */
  29         REG_RES_WRITE8(PCI_BASE_ADDRESS_0, 0x002e, 0x0e),
  30         REG_SCRIPT_END,
  31 };
  32
  33 static void emmc_init(struct device *dev)
  34 {
  35         struct soc_intel_baytrail_config *config = config_of(dev);
  36
  37         printk(BIOS_DEBUG, "eMMC init\n");
  38         reg_script_run_on_dev(dev, emmc_ops);
  39
  40         if (config->scc_acpi_mode)
  41                 scc_enable_acpi_mode(dev, SCC_MMC_CTL, SCC_NVS_MMC);
  42 }
  43
  44 static struct device_operations device_ops = {
  45         .read_resources         = pci_dev_read_resources,
  46         .set_resources          = pci_dev_set_resources,
  47         .enable_resources       = pci_dev_enable_resources,
  48         .init                   = emmc_init,
  49         .ops_pci                = &soc_pci_ops,
  50 };
  51
  52 static const struct pci_driver southcluster __pci_driver = {
  53         .ops            = &device_ops,
  54         .vendor         = PCI_VID_INTEL,
  55         .device         = MMC45_DEVID,
  56 };