diff options
Diffstat (limited to 'src/soc/amd/common/block/include/amdblocks/espi.h')
| -rw-r--r-- | src/soc/amd/common/block/include/amdblocks/espi.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/src/soc/amd/common/block/include/amdblocks/espi.h b/src/soc/amd/common/block/include/amdblocks/espi.h index f47386bc5d..e882af0305 100644 --- a/src/soc/amd/common/block/include/amdblocks/espi.h +++ b/src/soc/amd/common/block/include/amdblocks/espi.h @@ -26,6 +26,46 @@ #define ESPI_GENERIC_MMIO_WIN_COUNT 4 #define ESPI_GENERIC_MMIO_MAX_WIN_SIZE 0x10000 +#define ESPI_SLAVE0_CONFIG 0x68 +#define ESPI_CRC_CHECKING_EN (1 << 31) +#define ESPI_ALERT_MODE (1 << 30) + +#define ESPI_IO_MODE_SHIFT 28 +#define ESPI_IO_MODE_MASK (0x3 << ESPI_IO_MODE_SHIFT) +#define ESPI_IO_MODE_VALUE(x) ((x) << ESPI_IO_MODE_SHIFT) + +#define ESPI_OP_FREQ_SHIFT 25 +#define ESPI_OP_FREQ_MASK (0x7 << ESPI_OP_FREQ_SHIFT) +#define ESPI_OP_FREQ_VALUE(x) ((x) << ESPI_OP_FREQ_SHIFT) + +#define ESPI_PERIPH_CH_EN (1 << 3) +#define ESPI_VW_CH_EN (1 << 2) +#define ESPI_OOB_CH_EN (1 << 1) +#define ESPI_FLASH_CH_EN (1 << 0) + +/* + * Virtual wire interrupt polarity. If the interrupt is active level high or active falling + * edge, then controller expects its bit to be cleared in ESPI_RXVW_POLARITY whereas if the + * interrupt is active level low or active rising edge, then its bit needs to be set in + * ESPI_RXVW_POLARITY. + */ +#define ESPI_VW_IRQ_LEVEL_HIGH(x) (0 << (x)) +#define ESPI_VW_IRQ_LEVEL_LOW(x) (1 << (x)) +#define ESPI_VW_IRQ_EDGE_HIGH(x) (1 << (x)) +#define ESPI_VW_IRQ_EDGE_LOW(x) (0 << (x)) + +enum espi_io_mode { + ESPI_IO_MODE_SINGLE = ESPI_IO_MODE_VALUE(0), + ESPI_IO_MODE_DUAL = ESPI_IO_MODE_VALUE(1), + ESPI_IO_MODE_QUAD = ESPI_IO_MODE_VALUE(2), +}; + +enum espi_op_freq { + ESPI_OP_FREQ_16_MHZ = ESPI_OP_FREQ_VALUE(0), + ESPI_OP_FREQ_33_MHZ = ESPI_OP_FREQ_VALUE(1), + ESPI_OP_FREQ_66_MHZ = ESPI_OP_FREQ_VALUE(2), +}; + struct espi_config { /* Bitmap for standard IO decodes. Use ESPI_DECODE_IO_* above. */ uint32_t std_io_decode_bitmap; @@ -34,6 +74,21 @@ struct espi_config { uint16_t base; size_t size; } generic_io_range[ESPI_GENERIC_IO_WIN_COUNT]; + + /* Slave configuration parameters */ + enum espi_io_mode io_mode; + enum espi_op_freq op_freq_mhz; + + uint32_t crc_check_enable:1; + uint32_t dedicated_alert_pin:1; + uint32_t periph_ch_en:1; + uint32_t vw_ch_en:1; + uint32_t oob_ch_en:1; + uint32_t flash_ch_en:1; + uint32_t subtractive_decode:1; + + /* Use ESPI_VW_IRQ_* above */ + uint32_t vw_irq_polarity; }; /* @@ -60,4 +115,10 @@ void espi_configure_decodes(void); */ void espi_update_static_bar(uintptr_t bar); +/* + * Perform eSPI connection setup to the slave. Currently, this supports slave0 only. + * Returns 0 on success and -1 on error. + */ +int espi_setup(void); + #endif /* __AMDBLOCKS_ESPI_H__ */ |