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-rw-r--r--src/mainboard/asus/kgpe-d16/romstage.c70
1 files changed, 70 insertions, 0 deletions
diff --git a/src/mainboard/asus/kgpe-d16/romstage.c b/src/mainboard/asus/kgpe-d16/romstage.c
index bfa40427e4..1b586fd369 100644
--- a/src/mainboard/asus/kgpe-d16/romstage.c
+++ b/src/mainboard/asus/kgpe-d16/romstage.c
@@ -87,6 +87,76 @@ static void switch_spd_mux(uint8_t channel)
byte &= ~0xc0; /* Enable SPD mux GPIO output drivers */
byte |= (channel << 2) & 0xc; /* Set SPD mux GPIOs */
pci_write_config8(PCI_DEV(0, 0x14, 0), 0x54, byte);
+
+ /* Temporary AST PCI mapping */
+ const uint32_t memory_base = 0xfc000000;
+ const uint32_t memory_limit = 0xfc800000;
+
+#define TEMP_PCI_BUS 0x2
+ /* Save S100 PCI bridge settings */
+ uint16_t prev_sec_cfg = pci_read_config16(PCI_DEV(0, 0x14, 4),
+ PCI_COMMAND);
+ uint8_t prev_sec_bus = pci_read_config8(PCI_DEV(0, 0x14, 4),
+ PCI_SECONDARY_BUS);
+ uint8_t prev_sec_sub_bus = pci_read_config8(PCI_DEV(0, 0x14, 4),
+ PCI_SUBORDINATE_BUS);
+ uint16_t prev_sec_mem_base = pci_read_config16(PCI_DEV(0, 0x14, 4),
+ PCI_MEMORY_BASE);
+ uint16_t prev_sec_mem_limit = pci_read_config16(PCI_DEV(0, 0x14, 4),
+ PCI_MEMORY_LIMIT);
+ /* Temporarily enable the SP5100 PCI bridge */
+ pci_write_config8(PCI_DEV(0, 0x14, 4), PCI_SECONDARY_BUS, TEMP_PCI_BUS);
+ pci_write_config8(PCI_DEV(0, 0x14, 4), PCI_SUBORDINATE_BUS, 0xff);
+ pci_write_config16(PCI_DEV(0, 0x14, 4), PCI_MEMORY_BASE,
+ (memory_base >> 20));
+ pci_write_config16(PCI_DEV(0, 0x14, 4), PCI_MEMORY_LIMIT,
+ (memory_limit >> 20));
+ pci_write_config16(PCI_DEV(0, 0x14, 4), PCI_COMMAND,
+ PCI_COMMAND_MEMORY);
+
+ /* Temporarily enable AST BAR1 */
+ uint16_t prev_ast_cmd = pci_read_config16(PCI_DEV(TEMP_PCI_BUS, 0x1, 0),
+ PCI_COMMAND);
+ uint16_t prev_ast_sts = pci_read_config16(PCI_DEV(TEMP_PCI_BUS, 0x1, 0),
+ PCI_STATUS);
+ uint32_t prev_ast_bar1 = pci_read_config32(
+ PCI_DEV(TEMP_PCI_BUS, 0x1, 0), PCI_BASE_ADDRESS_1);
+ pci_write_config32(PCI_DEV(TEMP_PCI_BUS, 0x1, 0), PCI_BASE_ADDRESS_1,
+ memory_base);
+ pci_write_config16(PCI_DEV(TEMP_PCI_BUS, 0x1, 0), PCI_COMMAND,
+ PCI_COMMAND_MEMORY);
+ pci_write_config16(PCI_DEV(TEMP_PCI_BUS, 0x1, 0), PCI_STATUS,
+ PCI_STATUS_CAP_LIST | PCI_STATUS_DEVSEL_MEDIUM);
+
+ /* Use the P2A bridge to set ASpeed SPD mux GPIOs to the same values as the SP5100 */
+ void* ast_bar1 = (void*)memory_base;
+ /* Enable access to GPIO controller */
+ write32(ast_bar1 + 0xf004, 0x1e780000);
+ write32(ast_bar1 + 0xf000, 0x1);
+ /* Enable SPD mux GPIO output drivers */
+ write32(ast_bar1 + 0x10024, read32(ast_bar1 + 0x10024) | 0x3000);
+ /* Set SPD mux GPIOs */
+ write32(ast_bar1 + 0x10020, (read32(ast_bar1 + 0x10020) & ~0x3000)
+ | ((channel & 0x3) << 12));
+ write32(ast_bar1 + 0xf000, 0x0);
+
+ /* Deconfigure AST BAR1 */
+ pci_write_config16(PCI_DEV(TEMP_PCI_BUS, 0x1, 0), PCI_COMMAND,
+ prev_ast_cmd);
+ pci_write_config16(PCI_DEV(TEMP_PCI_BUS, 0x1, 0), PCI_STATUS,
+ prev_ast_sts);
+ pci_write_config32(PCI_DEV(TEMP_PCI_BUS, 0x1, 0), PCI_BASE_ADDRESS_1,
+ prev_ast_bar1);
+
+ /* Deconfigure SP5100 PCI bridge */
+ pci_write_config16(PCI_DEV(0, 0x14, 4), PCI_COMMAND, prev_sec_cfg);
+ pci_write_config16(PCI_DEV(0, 0x14, 4), PCI_MEMORY_LIMIT,
+ prev_sec_mem_limit);
+ pci_write_config16(PCI_DEV(0, 0x14, 4), PCI_MEMORY_BASE,
+ prev_sec_mem_base);
+ pci_write_config8(PCI_DEV(0, 0x14, 4), PCI_SUBORDINATE_BUS,
+ prev_sec_sub_bus);
+ pci_write_config8(PCI_DEV(0, 0x14, 4), PCI_SECONDARY_BUS, prev_sec_bus);
}
static const uint8_t spd_addr_fam15[] = {