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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>
This commit is contained in:
Furquan Shaikh 2020-04-28 18:45:20 -07:00
parent 73716d0e92
commit a0284db08d
2 changed files with 41 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

54
src/soc/amd/picasso/include/soc/southbridge.h
View File

@ -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)

13
src/soc/amd/picasso/southbridge.c
View File

@ -214,11 +214,8 @@ static uintptr_t sb_init_spi_base(void)
void sb_set_spi100(u16 norm, u16 fast, u16 alt, u16 tpm)
{
uintptr_t base = sb_init_spi_base();
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_SPEED_CONFIG), SPI_SPEED_CFG(norm, fast, alt, tpm));
write16((void *)(base + SPI100_ENABLE), SPI_USE_SPI100);
}
@ -233,9 +230,9 @@ void sb_disable_4dw_burst(void)
void sb_read_mode(u32 mode)
{
uintptr_t base = sb_init_spi_base();
write32((void *)(base + SPI_CNTRL0),
(read32((void *)(base + SPI_CNTRL0))
& ~SPI_READ_MODE_MASK) | mode);
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_smbus_init(void)