| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #ifndef _HUDSON_EARLY_SETUP_C_ |
| #define _HUDSON_EARLY_SETUP_C_ |
| |
| #include <assert.h> |
| #include <stdint.h> |
| #include <amdblocks/acpimmio.h> |
| #include <device/mmio.h> |
| #include <device/pci_ops.h> |
| |
| #include "hudson.h" |
| #include "pci_devs.h" |
| #include <Fch/Fch.h> |
| |
| void hudson_pci_port80(void) |
| { |
| u8 byte; |
| pci_devfn_t dev; |
| |
| /* P2P Bridge */ |
| dev = PCI_DEV(0, 0x14, 4); |
| |
| /* Chip Control: Enable subtractive decoding */ |
| byte = pci_read_config8(dev, 0x40); |
| byte |= 1 << 5; |
| pci_write_config8(dev, 0x40, byte); |
| |
| /* Misc Control: Enable subtractive decoding if 0x40 bit 5 is set */ |
| byte = pci_read_config8(dev, 0x4B); |
| byte |= 1 << 7; |
| pci_write_config8(dev, 0x4B, byte); |
| |
| /* The same IO Base and IO Limit here is meaningful because we set the |
| * bridge to be subtractive. During early setup stage, we have to make |
| * sure that data can go through port 0x80. |
| */ |
| /* IO Base: 0xf000 */ |
| byte = pci_read_config8(dev, 0x1C); |
| byte |= 0xF << 4; |
| pci_write_config8(dev, 0x1C, byte); |
| |
| /* IO Limit: 0xf000 */ |
| byte = pci_read_config8(dev, 0x1D); |
| byte |= 0xF << 4; |
| pci_write_config8(dev, 0x1D, byte); |
| |
| /* PCI Command: Enable IO response */ |
| byte = pci_read_config8(dev, 0x04); |
| byte |= 1 << 0; |
| pci_write_config8(dev, 0x04, byte); |
| |
| /* LPC controller */ |
| dev = PCI_DEV(0, 0x14, 3); |
| |
| byte = pci_read_config8(dev, 0x4A); |
| byte &= ~(1 << 5); /* disable lpc port 80 */ |
| pci_write_config8(dev, 0x4A, byte); |
| } |
| |
| void hudson_lpc_port80(void) |
| { |
| u8 byte; |
| |
| /* Enable port 80 LPC decode in pci function 3 configuration space. */ |
| const pci_devfn_t dev = PCI_DEV(0, 0x14, 3); |
| byte = pci_read_config8(dev, 0x4a); |
| byte |= 1 << 5; /* enable port 80 */ |
| pci_write_config8(dev, 0x4a, byte); |
| } |
| |
| void hudson_lpc_decode(void) |
| { |
| u32 tmp; |
| |
| /* Enable LPC controller */ |
| pm_write8(0xec, pm_read8(0xec) | 0x01); |
| |
| const pci_devfn_t dev = PCI_DEV(0, 0x14, 3); |
| /* Serial port enumeration on Hudson: |
| * PORT0 - 0x3f8 |
| * PORT1 - 0x2f8 |
| * PORT5 - 0x2e8 |
| * PORT7 - 0x3e8 |
| */ |
| tmp = DECODE_ENABLE_SERIAL_PORT0 | DECODE_ENABLE_SERIAL_PORT1 |
| | DECODE_ENABLE_SERIAL_PORT5 | DECODE_ENABLE_SERIAL_PORT7; |
| |
| pci_write_config32(dev, LPC_IO_PORT_DECODE_ENABLE, tmp); |
| } |
| |
| static void enable_wideio(uint8_t port, uint16_t size) |
| { |
| uint32_t wideio_enable[] = { |
| LPC_WIDEIO0_ENABLE, |
| LPC_WIDEIO1_ENABLE, |
| LPC_WIDEIO2_ENABLE |
| }; |
| uint32_t alt_wideio_enable[] = { |
| LPC_ALT_WIDEIO0_ENABLE, |
| LPC_ALT_WIDEIO1_ENABLE, |
| LPC_ALT_WIDEIO2_ENABLE |
| }; |
| const pci_devfn_t dev = PCI_DEV(0, PCU_DEV, LPC_FUNC); |
| uint32_t tmp; |
| |
| /* Only allow port 0-2 */ |
| assert(port <= ARRAY_SIZE(wideio_enable)); |
| |
| if (size == 16) { |
| tmp = pci_read_config32(dev, LPC_ALT_WIDEIO_RANGE_ENABLE); |
| tmp |= alt_wideio_enable[port]; |
| pci_write_config32(dev, LPC_ALT_WIDEIO_RANGE_ENABLE, tmp); |
| } else { /* 512 */ |
| tmp = pci_read_config32(dev, LPC_ALT_WIDEIO_RANGE_ENABLE); |
| tmp &= ~alt_wideio_enable[port]; |
| pci_write_config32(dev, LPC_ALT_WIDEIO_RANGE_ENABLE, tmp); |
| } |
| |
| /* Enable the range */ |
| tmp = pci_read_config32(dev, LPC_IO_OR_MEM_DECODE_ENABLE); |
| tmp |= wideio_enable[port]; |
| pci_write_config32(dev, LPC_IO_OR_MEM_DECODE_ENABLE, tmp); |
| } |
| |
| /* |
| * lpc_wideio_window() may be called any point in romstage, but take |
| * care that AGESA doesn't overwrite the range this function used. |
| * The function checks if there is an empty range and if all ranges are |
| * used the function throws an assert. The function doesn't check for a |
| * duplicate range, for ranges that can be merged into a single |
| * range, or ranges that overlap. |
| * |
| * The developer is expected to ensure that there are no conflicts. |
| */ |
| static void lpc_wideio_window(uint16_t base, uint16_t size) |
| { |
| const pci_devfn_t dev = PCI_DEV(0, PCU_DEV, LPC_FUNC); |
| u32 tmp; |
| |
| /* Support 512 or 16 bytes per range */ |
| assert(size == 512 || size == 16); |
| |
| /* Find and open Base Register and program it */ |
| tmp = pci_read_config32(dev, LPC_WIDEIO_GENERIC_PORT); |
| |
| if ((tmp & 0xFFFF) == 0) { /* WIDEIO0 */ |
| tmp |= base; |
| pci_write_config32(dev, LPC_WIDEIO_GENERIC_PORT, tmp); |
| enable_wideio(0, size); |
| } else if ((tmp & 0xFFFF0000) == 0) { /* WIDEIO1 */ |
| tmp |= (base << 16); |
| pci_write_config32(dev, LPC_WIDEIO_GENERIC_PORT, tmp); |
| enable_wideio(1, size); |
| } else { /* Check WIDEIO2 register */ |
| tmp = pci_read_config32(dev, LPC_WIDEIO2_GENERIC_PORT); |
| if ((tmp & 0xFFFF) == 0) { /* WIDEIO2 */ |
| tmp |= base; |
| pci_write_config32(dev, LPC_WIDEIO2_GENERIC_PORT, tmp); |
| enable_wideio(2, size); |
| } else { /* All WIDEIO locations used*/ |
| BUG(); |
| } |
| } |
| } |
| |
| void lpc_wideio_512_window(uint16_t base) |
| { |
| assert(IS_ALIGNED(base, 512)); |
| lpc_wideio_window(base, 512); |
| } |
| |
| void lpc_wideio_16_window(uint16_t base) |
| { |
| assert(IS_ALIGNED(base, 16)); |
| lpc_wideio_window(base, 16); |
| } |
| |
| void hudson_clk_output_48Mhz(void) |
| { |
| u32 ctrl; |
| |
| /* |
| * Enable the X14M_25M_48M_OSC pin and leaving it at it's default so |
| * 48Mhz will be on ball AP13 (FT3b package) |
| */ |
| ctrl = misc_read32(FCH_MISC_REG40); |
| |
| /* clear the OSCOUT1_ClkOutputEnb to enable the 48 Mhz clock */ |
| ctrl &= (u32)~(1 << 2); |
| misc_write32(FCH_MISC_REG40, ctrl); |
| } |
| |
| static uintptr_t hudson_spibase(void) |
| { |
| /* Make sure the base address is predictable */ |
| const pci_devfn_t dev = PCI_DEV(0, 0x14, 3); |
| |
| u32 base = pci_read_config32(dev, SPIROM_BASE_ADDRESS_REGISTER) |
| & 0xfffffff0; |
| if (!base) { |
| base = SPI_BASE_ADDRESS; |
| pci_write_config32(dev, SPIROM_BASE_ADDRESS_REGISTER, base |
| | SPI_ROM_ENABLE); |
| /* PCI_COMMAND_MEMORY is read-only and enabled. */ |
| } |
| return (uintptr_t)base; |
| } |
| |
| void hudson_set_spi100(u16 norm, u16 fast, u16 alt, u16 tpm) |
| { |
| uintptr_t base = hudson_spibase(); |
| write16((void *)(base + SPI100_SPEED_CONFIG), |
| (norm << SPI_NORM_SPEED_NEW_SH) | |
| (fast << SPI_FAST_SPEED_NEW_SH) | |
| (alt << SPI_ALT_SPEED_NEW_SH) | |
| (tpm << SPI_TPM_SPEED_NEW_SH)); |
| write16((void *)(base + SPI100_ENABLE), SPI_USE_SPI100 | |
| read16((void *)(base + SPI100_ENABLE))); |
| } |
| |
| void hudson_disable_4dw_burst(void) |
| { |
| uintptr_t base = hudson_spibase(); |
| write16((void *)(base + SPI100_HOST_PREF_CONFIG), |
| read16((void *)(base + SPI100_HOST_PREF_CONFIG)) |
| & ~SPI_RD4DW_EN_HOST); |
| } |
| |
| /* Hudson 1-3 only. For Hudson 1, call with fast=1 */ |
| void hudson_set_readspeed(u16 norm, u16 fast) |
| { |
| uintptr_t base = hudson_spibase(); |
| write16((void *)(base + SPI_CNTRL1), |
| (read16((void *)(base + SPI_CNTRL1)) |
| & ~SPI_CNTRL1_SPEED_MASK) |
| | (norm << SPI_NORM_SPEED_SH) |
| | (fast << SPI_FAST_SPEED_SH)); |
| } |
| |
| void hudson_read_mode(u32 mode) |
| { |
| uintptr_t base = hudson_spibase(); |
| write32((void *)(base + SPI_CNTRL0), |
| (read32((void *)(base + SPI_CNTRL0)) |
| & ~SPI_READ_MODE_MASK) | mode); |
| } |
| |
| void hudson_tpm_decode_spi(void) |
| { |
| const pci_devfn_t dev = PCI_DEV(0, 0x14, 3); /* LPC device */ |
| |
| u32 spibase = pci_read_config32(dev, SPIROM_BASE_ADDRESS_REGISTER); |
| pci_write_config32(dev, SPIROM_BASE_ADDRESS_REGISTER, spibase |
| | ROUTE_TPM_2_SPI); |
| } |
| |
| #endif |