diff options
| author | Furquan Shaikh <furquan@google.com> | 2020-05-11 16:43:37 -0700 |
|---|---|---|
| committer | Furquan Shaikh <furquan@google.com> | 2020-05-12 20:05:27 +0000 |
| commit | 470f627c2bbfda9ff7e42801fa93b5205e0ba654 (patch) | |
| tree | d7c6f212aeb6a79562c2d888025759bdcf45cb8e /src/include | |
| parent | f3ac812e022f70d54dfcb94510eafa3d14462627 (diff) | |
espi: Add some helper functions for espi capability check
This change adds helper functions that can be used to check support
for different slave capabilities.
BUG=b:153675913
Signed-off-by: Furquan Shaikh <furquan@google.com>
Change-Id: Ic66b06f9efcafd0eda4c6029fa67489de76bbed4
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41253
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/espi.h | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/src/include/espi.h b/src/include/espi.h index 171b1b8831..f0ae37383a 100644 --- a/src/include/espi.h +++ b/src/include/espi.h @@ -4,6 +4,8 @@ #ifndef __ESPI_H__ #define __ESPI_H__ +#include <stdint.h> + /* ESPI Slave Registers (Document # 327432-004 Revision 1.0 Chapter 7) */ #define ESPI_SLAVE_DEVICE_ID 0x04 @@ -226,4 +228,94 @@ #define ESPI_VW_VALUE(x, v) ((v) << (x)) #define ESPI_VW_SIGNAL_HIGH(x) (ESPI_VW_VALID(x) | ESPI_VW_VALUE(1, x)) #define ESPI_VW_SIGNAL_LOW(x) (ESPI_VW_VALID(x) | ESPI_VW_VALUE(0, x)) + +static inline bool espi_slave_supports_quad_io(uint32_t gen_caps) +{ + uint32_t mode = gen_caps & ESPI_SLAVE_IO_MODE_SUPP_MASK; + return (mode == ESPI_SLAVE_IO_MODE_SUPP_SINGLE_QUAD) || + (mode == ESPI_SLAVE_IO_MODE_SUPP_SINGLE_DUAL_QUAD); +} + +static inline bool espi_slave_supports_dual_io(uint32_t gen_caps) +{ + uint32_t mode = gen_caps & ESPI_SLAVE_IO_MODE_SUPP_MASK; + return (mode == ESPI_SLAVE_IO_MODE_SUPP_SINGLE_DUAL) || + (mode == ESPI_SLAVE_IO_MODE_SUPP_SINGLE_DUAL_QUAD); +} + +static inline bool espi_slave_supports_66_mhz(uint32_t gen_caps) +{ + uint32_t freq = gen_caps & ESPI_SLAVE_OP_FREQ_SUPP_MASK; + return freq == ESPI_SLAVE_OP_FREQ_SUPP_66_MHZ; +} + +static inline bool espi_slave_supports_50_mhz(uint32_t gen_caps) +{ + uint32_t freq = gen_caps & ESPI_SLAVE_OP_FREQ_SUPP_MASK; + return freq == ESPI_SLAVE_OP_FREQ_SUPP_50_MHZ; +} + +static inline bool espi_slave_supports_33_mhz(uint32_t gen_caps) +{ + uint32_t freq = gen_caps & ESPI_SLAVE_OP_FREQ_SUPP_MASK; + return freq == ESPI_SLAVE_OP_FREQ_SUPP_33_MHZ; +} + +static inline bool espi_slave_supports_25_mhz(uint32_t gen_caps) +{ + uint32_t freq = gen_caps & ESPI_SLAVE_OP_FREQ_SUPP_MASK; + return freq == ESPI_SLAVE_OP_FREQ_SUPP_25_MHZ; +} + +static inline bool espi_slave_supports_20_mhz(uint32_t gen_caps) +{ + uint32_t freq = gen_caps & ESPI_SLAVE_OP_FREQ_SUPP_MASK; + return freq == ESPI_SLAVE_OP_FREQ_SUPP_20_MHZ; +} + +static inline int espi_slave_max_speed_mhz_supported(uint32_t gen_caps) +{ + if (espi_slave_supports_66_mhz(gen_caps)) + return 66; + else if (espi_slave_supports_50_mhz(gen_caps)) + return 50; + else if (espi_slave_supports_33_mhz(gen_caps)) + return 33; + else if (espi_slave_supports_25_mhz(gen_caps)) + return 25; + else if (espi_slave_supports_20_mhz(gen_caps)) + return 20; + return 0; +} + +static inline bool espi_slave_supports_vw_channel(uint32_t gen_caps) +{ + return !!(gen_caps & ESPI_SLAVE_VW_CH_SUPP); +} + +static inline bool espi_slave_supports_periph_channel(uint32_t gen_caps) +{ + return !!(gen_caps & ESPI_SLAVE_PERIPH_CH_SUPP); +} + +static inline bool espi_slave_supports_oob_channel(uint32_t gen_caps) +{ + return !!(gen_caps & ESPI_SLAVE_OOB_CH_SUPP); +} + +static inline bool espi_slave_supports_flash_channel(uint32_t gen_caps) +{ + return !!(gen_caps & ESPI_SLAVE_FLASH_CH_SUPP); +} + +static inline bool espi_slave_is_channel_ready(uint32_t config) +{ + return !!(config & ESPI_SLAVE_CHANNEL_READY); +} + +static inline uint32_t espi_slave_get_vw_count_supp(uint32_t vw_caps) +{ + return (vw_caps & ESPI_SLAVE_VW_COUNT_SUPP_MASK) >> ESPI_SLAVE_VW_COUNT_SUPP_SHIFT; +} + #endif /* __ESPI_H__ */ |