diff options
Diffstat (limited to 'src/soc/amd')
| -rw-r--r-- | src/soc/amd/common/block/include/amdblocks/chip.h | 12 | ||||
| -rw-r--r-- | src/soc/amd/common/block/include/amdblocks/spi.h | 97 | ||||
| -rw-r--r-- | src/soc/amd/common/block/spi/Makefile.inc | 9 | ||||
| -rw-r--r-- | src/soc/amd/common/block/spi/fch_spi.c | 86 | ||||
| -rw-r--r-- | src/soc/amd/common/block/spi/fch_spi_ctrl.c | 2 |
5 files changed, 205 insertions, 1 deletions
diff --git a/src/soc/amd/common/block/include/amdblocks/chip.h b/src/soc/amd/common/block/include/amdblocks/chip.h index 26ad26a6b1..6e3c973c97 100644 --- a/src/soc/amd/common/block/include/amdblocks/chip.h +++ b/src/soc/amd/common/block/include/amdblocks/chip.h @@ -4,7 +4,19 @@ #ifndef __AMDBLOCKS_CHIP_H__ #define __AMDBLOCKS_CHIP_H__ +#include <amdblocks/spi.h> + struct soc_amd_common_config { + /* + * SPI configuration + * Default values if not overridden by mainboard: + * Read mode - Normal 33MHz + * Normal speed - 66MHz + * Fast speed - 66MHz + * Alt speed - 66MHz + * TPM speed - 66MHz + */ + struct spi_config spi_config; }; /* diff --git a/src/soc/amd/common/block/include/amdblocks/spi.h b/src/soc/amd/common/block/include/amdblocks/spi.h new file mode 100644 index 0000000000..d901f7e020 --- /dev/null +++ b/src/soc/amd/common/block/include/amdblocks/spi.h @@ -0,0 +1,97 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* This file is part of the coreboot project. */ + +#ifndef __AMDBLOCKS_SPI_H__ +#define __AMDBLOCKS_SPI_H__ + +#define SPI_CNTRL0 0x00 +#define SPI_BUSY BIT(31) + +enum spi_read_mode { + SPI_READ_MODE_NORMAL33M = 0, + /* 1 is reserved. */ + SPI_READ_MODE_DUAL112 = 2, + SPI_READ_MODE_QUAD114 = 3, + SPI_READ_MODE_DUAL122 = 4, + SPI_READ_MODE_QUAD144 = 5, + SPI_READ_MODE_NORMAL66M = 6, + SPI_READ_MODE_FAST_READ = 7, +}; +/* + * SPI read mode is split into bits 18, 29, 30 such that [30:29:18] correspond to bits [2:0] for + * SpiReadMode. + */ +#define SPI_READ_MODE_MASK (BIT(30) | BIT(29) | BIT(18)) +#define SPI_READ_MODE_UPPER_BITS(x) ((((x) >> 1) & 0x3) << 29) +#define SPI_READ_MODE_LOWER_BITS(x) (((x) & 0x1) << 18) +#define SPI_READ_MODE(x) (SPI_READ_MODE_UPPER_BITS(x) | \ + SPI_READ_MODE_LOWER_BITS(x)) +#define SPI_ACCESS_MAC_ROM_EN BIT(22) + +#define SPI100_ENABLE 0x20 +#define SPI_USE_SPI100 BIT(0) + +/* Use SPI_SPEED_16M-SPI_SPEED_66M below for the southbridge */ +#define SPI100_SPEED_CONFIG 0x22 +enum spi100_speed { + SPI_SPEED_66M = 0, + SPI_SPEED_33M = 1, + SPI_SPEED_22M = 2, + SPI_SPEED_16M = 3, + SPI_SPEED_100M = 4, + SPI_SPEED_800K = 5, +}; + +#define SPI_SPEED_MASK 0xf +#define SPI_SPEED_MODE(x, shift) (((x) & SPI_SPEED_MASK) << shift) +#define SPI_NORM_SPEED(x) SPI_SPEED_MODE(x, 12) +#define SPI_FAST_SPEED(x) SPI_SPEED_MODE(x, 8) +#define SPI_ALT_SPEED(x) SPI_SPEED_MODE(x, 4) +#define SPI_TPM_SPEED(x) SPI_SPEED_MODE(x, 0) + +#define SPI_SPEED_CFG(n, f, a, t) (SPI_NORM_SPEED(n) | SPI_FAST_SPEED(f) | \ + SPI_ALT_SPEED(a) | SPI_TPM_SPEED(t)) + +#define SPI100_HOST_PREF_CONFIG 0x2c +#define SPI_RD4DW_EN_HOST BIT(15) + +#define SPI_FIFO 0x80 +#define SPI_FIFO_DEPTH (0xc7 - SPI_FIFO) + +struct spi_config { + /* + * Default values if not overridden by mainboard: + * Read mode - Normal 33MHz + * Normal speed - 66MHz + * Fast speed - 66MHz + * Alt speed - 66MHz + * TPM speed - 66MHz + */ + enum spi_read_mode read_mode; + enum spi100_speed normal_speed; + enum spi100_speed fast_speed; + enum spi100_speed altio_speed; + enum spi100_speed tpm_speed; +}; + +/* + * Perform early SPI initialization: + * 1. Sets SPI ROM base and enables SPI ROM + * 2. Enables SPI ROM prefetching + * 3. Disables 4dw burst + * 4. Configures SPI speed and read mode. + * + * This function expects SoC to include soc_amd_common_config in chip SoC config and uses + * settings from mainboard devicetree to configure speed and read mode. + */ +void fch_spi_early_init(void); + +/* + * Configure SPI speed and read mode. + * + * This function expects SoC to include soc_amd_common_config in chip SoC config and uses + * settings from mainboard devicetree to configure speed and read mode. + */ +void fch_spi_config_modes(void); + +#endif /* __AMDBLOCKS_SPI_H__ */ diff --git a/src/soc/amd/common/block/spi/Makefile.inc b/src/soc/amd/common/block/spi/Makefile.inc index 0e706ef3cb..3d541b7052 100644 --- a/src/soc/amd/common/block/spi/Makefile.inc +++ b/src/soc/amd/common/block/spi/Makefile.inc @@ -9,4 +9,13 @@ ifeq ($(CONFIG_SPI_FLASH_SMM),y) smm-y += fch_spi_ctrl.c endif +bootblock-y += fch_spi.c +romstage-y += fch_spi.c +postcar-y += fch_spi.c +ramstage-y += fch_spi.c +verstage-y += fch_spi.c +ifeq ($(CONFIG_SPI_FLASH_SMM),y) +smm-y += fch_spi.c +endif + endif diff --git a/src/soc/amd/common/block/spi/fch_spi.c b/src/soc/amd/common/block/spi/fch_spi.c new file mode 100644 index 0000000000..950eee2947 --- /dev/null +++ b/src/soc/amd/common/block/spi/fch_spi.c @@ -0,0 +1,86 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* This file is part of the coreboot project. */ + +#include <amdblocks/chip.h> +#include <amdblocks/lpc.h> +#include <amdblocks/spi.h> +#include <arch/mmio.h> +#include <console/console.h> +#include <soc/iomap.h> +#include <stdint.h> + +static uintptr_t fch_spi_base(void) +{ + uintptr_t base; + + base = lpc_get_spibase(); + + if (base) + return base; + + lpc_set_spibase(SPI_BASE_ADDRESS); + lpc_enable_spi_rom(SPI_ROM_ENABLE); + + return SPI_BASE_ADDRESS; +} + +static void fch_spi_set_spi100(int norm, int fast, int alt, int tpm) +{ + uintptr_t base = fch_spi_base(); + + write16((void *)(base + SPI100_SPEED_CONFIG), SPI_SPEED_CFG(norm, fast, alt, tpm)); + write16((void *)(base + SPI100_ENABLE), SPI_USE_SPI100); +} + +static void fch_spi_disable_4dw_burst(void) +{ + uintptr_t base = fch_spi_base(); + uint16_t val = read16((void *)(base + SPI100_HOST_PREF_CONFIG)); + + write16((void *)(base + SPI100_HOST_PREF_CONFIG), val & ~SPI_RD4DW_EN_HOST); +} + +static void fch_spi_set_read_mode(u32 mode) +{ + uintptr_t base = fch_spi_base(); + uint32_t val = read32((void *)(base + SPI_CNTRL0)) & ~SPI_READ_MODE_MASK; + + write32((void *)(base + SPI_CNTRL0), val | SPI_READ_MODE(mode)); +} + +static void fch_spi_config_mb_modes(void) +{ + const struct soc_amd_common_config *cfg = soc_get_common_config(); + + if (!cfg) + die("Common config structure is NULL!\n"); + + const struct spi_config *spi_cfg = &cfg->spi_config; + + fch_spi_set_read_mode(spi_cfg->read_mode); + fch_spi_set_spi100(spi_cfg->normal_speed, spi_cfg->fast_speed, + spi_cfg->altio_speed, spi_cfg->tpm_speed); +} + +static void fch_spi_config_em100_modes(void) +{ + fch_spi_set_read_mode(SPI_READ_MODE_NORMAL33M); + fch_spi_set_spi100(SPI_SPEED_16M, SPI_SPEED_16M, SPI_SPEED_16M, SPI_SPEED_16M); +} + +void fch_spi_config_modes(void) +{ + if (CONFIG(EM100)) + fch_spi_config_em100_modes(); + else + fch_spi_config_mb_modes(); +} + +void fch_spi_early_init(void) +{ + lpc_set_spibase(SPI_BASE_ADDRESS); + lpc_enable_spi_rom(SPI_ROM_ENABLE); + lpc_enable_spi_prefetch(); + fch_spi_disable_4dw_burst(); + fch_spi_config_modes(); +} diff --git a/src/soc/amd/common/block/spi/fch_spi_ctrl.c b/src/soc/amd/common/block/spi/fch_spi_ctrl.c index c0751a3f33..b048f1cbf7 100644 --- a/src/soc/amd/common/block/spi/fch_spi_ctrl.c +++ b/src/soc/amd/common/block/spi/fch_spi_ctrl.c @@ -2,9 +2,9 @@ #include <console/console.h> #include <spi_flash.h> -#include <soc/southbridge.h> #include <soc/pci_devs.h> #include <amdblocks/lpc.h> +#include <amdblocks/spi.h> #include <device/pci_ops.h> #include <lib.h> #include <timer.h> |