diff options
| author | Furquan Shaikh <furquan@google.com> | 2020-04-28 18:45:20 -0700 |
|---|---|---|
| committer | Furquan Shaikh <furquan@google.com> | 2020-04-30 20:59:50 +0000 |
| commit | a0284db08df3e0150202fd1cfc8c2c675c19f4de (patch) | |
| tree | de6260608c26aac731c4519f874b7da1b6ea63d7 /src/soc/amd/picasso/include | |
| parent | 73716d0e924080ea32274a265a8de04e009c3676 (diff) | |
soc/amd/picasso: Introduce enums for SPI read mode and speed
This change adds enums for spi_read_mode and spi100_speed in
preparation for adding these to chip.h in follow-up CLs. This makes it
easier to reference what the mainboard is expected to set for these
SPI configs.
BUG=b:147758054,b:153675510
BRANCH=trembyle-bringup
TEST=Verified that SPI configuration is correct for trembyle.
Signed-off-by: Furquan Shaikh <furquan@google.com>
Change-Id: I7f9778b41bd059a50f20993415ebd8702a1ad58e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/40823
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/soc/amd/picasso/include')
| -rw-r--r-- | src/soc/amd/picasso/include/soc/southbridge.h | 54 |
1 files changed, 36 insertions, 18 deletions
diff --git a/src/soc/amd/picasso/include/soc/southbridge.h b/src/soc/amd/picasso/include/soc/southbridge.h index cf1d124744..1ce7019526 100644 --- a/src/soc/amd/picasso/include/soc/southbridge.h +++ b/src/soc/amd/picasso/include/soc/southbridge.h @@ -243,15 +243,25 @@ #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)) -/* Nominal is 16.7MHz on older devices, 33MHz on newer */ -#define SPI_READ_MODE_NOM 0x00000000 -#define SPI_READ_MODE_DUAL112 ( BIT(29) ) -#define SPI_READ_MODE_QUAD114 ( BIT(29) | BIT(18)) -#define SPI_READ_MODE_DUAL122 (BIT(30) ) -#define SPI_READ_MODE_QUAD144 (BIT(30) | BIT(18)) -#define SPI_READ_MODE_NORMAL66 (BIT(30) | BIT(29) ) -#define SPI_READ_MODE_FAST (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 SPI_FIFO_PTR_CLR BIT(20) #define SPI_ARB_ENABLE BIT(19) @@ -264,16 +274,24 @@ /* Use SPI_SPEED_16M-SPI_SPEED_66M below for the southbridge */ #define SPI100_SPEED_CONFIG 0x22 -#define SPI_SPEED_66M (0x0) -#define SPI_SPEED_33M ( BIT(0)) -#define SPI_SPEED_22M ( BIT(1) ) -#define SPI_SPEED_16M ( BIT(1) | BIT(0)) -#define SPI_SPEED_100M (BIT(2) ) -#define SPI_SPEED_800K (BIT(2) | BIT(0)) -#define SPI_NORM_SPEED_NEW_SH 12 -#define SPI_FAST_SPEED_NEW_SH 8 -#define SPI_ALT_SPEED_NEW_SH 4 -#define SPI_TPM_SPEED_NEW_SH 0 +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) |