| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <device/pci_ops.h> |
| #include <console/console.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <device/pci_ids.h> |
| #include <intelblocks/p2sb.h> |
| #include <soc/iomap.h> |
| #include <soc/p2sb.h> |
| #include <soc/pci_devs.h> |
| #include <string.h> |
| |
| #define PCH_P2SB_EPMASK(mask_number) (PCH_P2SB_EPMASK0 + ((mask_number) * 4)) |
| |
| #define HIDE_BIT (1 << 0) |
| |
| static bool p2sb_is_hidden(void) |
| { |
| const uint16_t pci_vid = pci_read_config16(PCH_DEV_P2SB, PCI_VENDOR_ID); |
| |
| if (pci_vid == 0xffff) |
| return true; |
| if (pci_vid == PCI_VENDOR_ID_INTEL) |
| return false; |
| printk(BIOS_ERR, "P2SB PCI_VENDOR_ID is invalid, unknown if hidden\n"); |
| return true; |
| } |
| |
| void p2sb_enable_bar(void) |
| { |
| /* Enable PCR Base address in PCH */ |
| pci_write_config32(PCH_DEV_P2SB, PCI_BASE_ADDRESS_0, P2SB_BAR); |
| pci_write_config32(PCH_DEV_P2SB, PCI_BASE_ADDRESS_1, 0); |
| |
| /* Enable P2SB MSE */ |
| pci_write_config16(PCH_DEV_P2SB, PCI_COMMAND, |
| PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY); |
| } |
| |
| /* |
| * Enable decoding for HPET range. |
| * This is needed for FspMemoryInit to store and retrieve a global data |
| * pointer. |
| */ |
| void p2sb_configure_hpet(void) |
| { |
| /* |
| * Enable decoding for HPET memory address range. |
| * HPTC_OFFSET(0x60) bit 7, when set the P2SB will decode |
| * the High Performance Timer memory address range |
| * selected by bits 1:0 |
| */ |
| pci_write_config8(PCH_DEV_P2SB, HPTC_OFFSET, HPTC_ADDR_ENABLE_BIT); |
| } |
| |
| union p2sb_bdf p2sb_get_hpet_bdf(void) |
| { |
| const bool was_hidden = p2sb_is_hidden(); |
| if (was_hidden) |
| p2sb_unhide(); |
| |
| union p2sb_bdf bdf = { .raw = pci_read_config16(PCH_DEV_P2SB, PCH_P2SB_HBDF) }; |
| |
| if (was_hidden) |
| p2sb_hide(); |
| |
| return bdf; |
| } |
| |
| void p2sb_set_hpet_bdf(union p2sb_bdf bdf) |
| { |
| pci_write_config16(PCH_DEV_P2SB, PCH_P2SB_HBDF, bdf.raw); |
| } |
| |
| static void p2sb_set_hide_bit(int hide) |
| { |
| const uint16_t reg = PCH_P2SB_E0 + 1; |
| const uint8_t mask = HIDE_BIT; |
| uint8_t val; |
| |
| val = pci_read_config8(PCH_DEV_P2SB, reg); |
| val &= ~mask; |
| if (hide) |
| val |= mask; |
| pci_write_config8(PCH_DEV_P2SB, reg, val); |
| } |
| |
| void p2sb_unhide(void) |
| { |
| p2sb_set_hide_bit(0); |
| |
| if (p2sb_is_hidden()) |
| die_with_post_code(POST_HW_INIT_FAILURE, |
| "Unable to unhide PCH_DEV_P2SB device !\n"); |
| } |
| |
| void p2sb_hide(void) |
| { |
| p2sb_set_hide_bit(1); |
| |
| if (!p2sb_is_hidden()) |
| die_with_post_code(POST_HW_INIT_FAILURE, |
| "Unable to hide PCH_DEV_P2SB device !\n"); |
| } |
| |
| static void p2sb_configure_endpoints(int epmask_id, uint32_t mask) |
| { |
| uint32_t reg32; |
| |
| reg32 = pci_read_config32(PCH_DEV_P2SB, PCH_P2SB_EPMASK(epmask_id)); |
| pci_write_config32(PCH_DEV_P2SB, PCH_P2SB_EPMASK(epmask_id), |
| reg32 | mask); |
| } |
| |
| static void p2sb_lock_endpoints(void) |
| { |
| uint8_t reg8; |
| |
| /* Set the "Endpoint Mask Lock!", P2SB PCI offset E2h bit[1] to 1. */ |
| reg8 = pci_read_config8(PCH_DEV_P2SB, PCH_P2SB_E0 + 2); |
| pci_write_config8(PCH_DEV_P2SB, PCH_P2SB_E0 + 2, |
| reg8 | P2SB_E0_MASKLOCK); |
| } |
| |
| void p2sb_disable_sideband_access(void) |
| { |
| uint32_t ep_mask[P2SB_EP_MASK_MAX_REG]; |
| int i; |
| |
| memset(ep_mask, 0, sizeof(ep_mask)); |
| |
| p2sb_soc_get_sb_mask(ep_mask, ARRAY_SIZE(ep_mask)); |
| |
| /* Remove the host accessing right to PSF register range. */ |
| for (i = 0; i < P2SB_EP_MASK_MAX_REG; i++) |
| p2sb_configure_endpoints(i, ep_mask[i]); |
| |
| p2sb_lock_endpoints(); |
| } |
| |
| static void read_resources(struct device *dev) |
| { |
| /* |
| * There's only one resource on the P2SB device. It's also already |
| * manually set to a fixed address in earlier boot stages. |
| * The following code makes sure that it doesn't change if the device |
| * is visible and the resource allocator is being run. |
| */ |
| mmio_resource(dev, PCI_BASE_ADDRESS_0, P2SB_BAR / KiB, P2SB_SIZE / KiB); |
| } |
| |
| static const struct device_operations device_ops = { |
| .read_resources = read_resources, |
| .set_resources = noop_set_resources, |
| .ops_pci = &pci_dev_ops_pci, |
| }; |
| |
| static const unsigned short pci_device_ids[] = { |
| PCI_DEVICE_ID_INTEL_APL_P2SB, |
| PCI_DEVICE_ID_INTEL_GLK_P2SB, |
| PCI_DEVICE_ID_INTEL_LWB_P2SB, |
| PCI_DEVICE_ID_INTEL_LWB_P2SB_SUPER, |
| PCI_DEVICE_ID_INTEL_SKL_LP_P2SB, |
| PCI_DEVICE_ID_INTEL_SKL_P2SB, |
| PCI_DEVICE_ID_INTEL_KBL_P2SB, |
| PCI_DEVICE_ID_INTEL_CNL_P2SB, |
| PCI_DEVICE_ID_INTEL_CNP_H_P2SB, |
| PCI_DEVICE_ID_INTEL_ICL_P2SB, |
| PCI_DEVICE_ID_INTEL_CMP_P2SB, |
| PCI_DEVICE_ID_INTEL_CMP_H_P2SB, |
| PCI_DEVICE_ID_INTEL_TGL_P2SB, |
| PCI_DEVICE_ID_INTEL_EHL_P2SB, |
| PCI_DEVICE_ID_INTEL_JSP_P2SB, |
| PCI_DEVICE_ID_INTEL_ADP_P_P2SB, |
| PCI_DEVICE_ID_INTEL_ADP_S_P2SB, |
| 0, |
| }; |
| |
| static const struct pci_driver pmc __pci_driver = { |
| .ops = &device_ops, |
| .vendor = PCI_VENDOR_ID_INTEL, |
| .devices = pci_device_ids, |
| }; |