src/soc/intel/elkhartlake/bootblock/pch.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <commonlib/console/post_codes.h>
   4 #include <console/console.h>
   5 #include <device/device.h>
   6 #include <device/mmio.h>
   7 #include <device/pci_ops.h>
   8 #include <intelblocks/fast_spi.h>
   9 #include <intelblocks/gspi.h>
  10 #include <intelblocks/lpc_lib.h>
  11 #include <intelblocks/p2sb.h>
  12 #include <intelblocks/pcr.h>
  13 #include <intelblocks/pmclib.h>
  14 #include <intelblocks/rtc.h>
  15 #include <intelpch/espi.h>
  16 #include <soc/bootblock.h>
  17 #include <soc/iomap.h>
  18 #include <soc/p2sb.h>
  19 #include <soc/pch.h>
  20 #include <soc/pci_devs.h>
  21 #include <soc/pcr_ids.h>
  22 #include <soc/pm.h>
  23
  24 #define PCR_PSF3_TO_SHDW_PMC_REG_BASE   0x0C00
  25
  26 #define PCR_PSFX_TO_SHDW_BAR0   0
  27 #define PCR_PSFX_TO_SHDW_BAR1   0x4
  28 #define PCR_PSFX_TO_SHDW_BAR2   0x8
  29 #define PCR_PSFX_TO_SHDW_BAR3   0xC
  30 #define PCR_PSFX_TO_SHDW_BAR4   0x10
  31 #define PCR_PSFX_TO_SHDW_PCIEN_IOEN     0x01
  32 #define PCR_PSFX_T0_SHDW_PCIEN  0x1C
  33
  34 static void soc_config_pwrmbase(void)
  35 {
  36         /*
  37          * Assign Resources to PWRMBASE
  38          * Clear BIT 1-2 Command Register
  39          */
  40         pci_and_config16(PCH_DEV_PMC, PCI_COMMAND, ~(PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER));
  41
  42         /* Program PWRM Base */
  43         pci_write_config32(PCH_DEV_PMC, PWRMBASE, PCH_PWRM_BASE_ADDRESS);
  44
  45         /* Enable Bus Master and MMIO Space */
  46         pci_or_config16(PCH_DEV_PMC, PCI_COMMAND, (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER));
  47
  48         /* Enable PWRM in PMC */
  49         setbits32((void *)PCH_PWRM_BASE_ADDRESS + ACTL, PWRM_EN);
  50 }
  51
  52 void bootblock_pch_early_init(void)
  53 {
  54         /*
  55          * Perform P2SB configuration before any another controller initialization as the
  56          * controller might want to perform PCR settings.
  57          */
  58         p2sb_enable_bar();
  59         p2sb_configure_hpet();
  60
  61         fast_spi_early_init(SPI_BASE_ADDRESS);
  62         gspi_early_bar_init();
  63
  64         /*
  65          * Enabling PWRM Base for accessing
  66          * Global Reset Cause Register.
  67          */
  68         soc_config_pwrmbase();
  69 }
  70
  71 static void soc_config_acpibase(void)
  72 {
  73         uint32_t pmc_reg_value;
  74         const uint32_t pmc_base_reg = PCR_PSF3_TO_SHDW_PMC_REG_BASE;
  75
  76         pmc_reg_value = pcr_read32(PID_PSF3, pmc_base_reg + PCR_PSFX_TO_SHDW_BAR4);
  77
  78         if (pmc_reg_value != 0xffffffff) {
  79                 /* Disable IO Space before changing the address */
  80                 pcr_rmw32(PID_PSF3, pmc_base_reg + PCR_PSFX_T0_SHDW_PCIEN,
  81                                 ~PCR_PSFX_TO_SHDW_PCIEN_IOEN, 0);
  82                 /* Program ABASE in PSF3 PMC space BAR4*/
  83                 pcr_write32(PID_PSF3, pmc_base_reg + PCR_PSFX_TO_SHDW_BAR4,
  84                                 ACPI_BASE_ADDRESS);
  85                 /* Enable IO Space */
  86                 pcr_rmw32(PID_PSF3, pmc_base_reg + PCR_PSFX_T0_SHDW_PCIEN,
  87                                 0xffffffff, PCR_PSFX_TO_SHDW_PCIEN_IOEN);
  88         }
  89 }
  90
  91 void pch_early_iorange_init(void)
  92 {
  93         uint16_t io_enables = LPC_IOE_SUPERIO_2E_2F | LPC_IOE_KBC_60_64 |
  94                 LPC_IOE_EC_62_66 | LPC_IOE_LGE_200;
  95
  96         /* IO Decode Range */
  97         if (CONFIG(DRIVERS_UART_8250IO))
  98                 lpc_io_setup_comm_a_b();
  99
 100         /* IO Decode Enable */
 101         lpc_enable_fixed_io_ranges(io_enables);
 102
 103         /* Program generic IO Decode Range */
 104         pch_enable_lpc();
 105 }
 106
 107 void bootblock_pch_init(void)
 108 {
 109         /*
 110          * Enabling ABASE for accessing PM1_STS, PM1_EN, PM1_CNT,
 111          * GPE0_STS, GPE0_EN registers.
 112          */
 113         soc_config_acpibase();
 114
 115         /* Set up GPE configuration */
 116         pmc_gpe_init();
 117
 118         enable_rtc_upper_bank();
 119 }