diff options
| author | Subrata Banik <subratabanik@google.com> | 2023-01-16 17:04:09 +0530 |
|---|---|---|
| committer | Lean Sheng Tan <sheng.tan@9elements.com> | 2023-01-24 09:53:07 +0000 |
| commit | b53e27bc2495ca5b5ba6b84d3a6768d9ad380a93 (patch) | |
| tree | 72ba62bba9b9a9e658a8036464d121d4c3e3104d /src | |
| parent | 76d49a7c45b27e448327b8971d63ac1955d8d6a0 (diff) | |
soc/intel/alderlake: Implement API to disable UFS controllers
This patch implements a new API to make the UFS controller function
disabled. Additionally, perform a warm reset post disabling the UFS
controller to let PMC know about the state of the UFS controller
and disable the MPHY clock.
BUG=b:264838335
TEST=Able to build and boot Google/Marasov successfully.
From the AP log, I am able to confirm that UFS is function disabled
using PSF.
Signed-off-by: Subrata Banik <subratabanik@google.com>
Change-Id: I940a634f70f8c97ef1234866d4c5a1ff224c6e24
Reviewed-on: https://review.coreboot.org/c/coreboot/+/71989
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>
Diffstat (limited to 'src')
| -rw-r--r-- | src/soc/intel/alderlake/romstage/romstage.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/src/soc/intel/alderlake/romstage/romstage.c b/src/soc/intel/alderlake/romstage/romstage.c index e78f106f80..2ccadbca4a 100644 --- a/src/soc/intel/alderlake/romstage/romstage.c +++ b/src/soc/intel/alderlake/romstage/romstage.c @@ -2,11 +2,13 @@ #include <arch/romstage.h> #include <cbmem.h> +#include <cf9_reset.h> #include <console/console.h> #include <fsp/util.h> #include <intelblocks/cfg.h> #include <intelblocks/cse.h> #include <intelblocks/early_graphics.h> +#include <intelblocks/pcr.h> #include <intelblocks/pmclib.h> #include <intelblocks/smbus.h> #include <intelblocks/thermal.h> @@ -21,6 +23,23 @@ #include <timestamp.h> #include <string.h> #include <security/intel/txt/txt.h> +#include <soc/pcr_ids.h> + +#define PSF_UFS0_BASE_ADDRESS 0x280 +#define PSF_UFS1_BASE_ADDRESS 0x300 +#define PCR_PSFX_T0_SHDW_PCIEN 0x1C +#define PCR_PSFX_T0_SHDW_PCIEN_FUNDIS (1 << 8) + +static void disable_ufs(void) +{ + /* disable USF0 */ + pcr_or32(PID_PSF2, PSF_UFS0_BASE_ADDRESS + PCR_PSFX_T0_SHDW_PCIEN, + PCR_PSFX_T0_SHDW_PCIEN_FUNDIS); + + /* disable USF1 */ + pcr_or32(PID_PSF2, PSF_UFS1_BASE_ADDRESS + PCR_PSFX_T0_SHDW_PCIEN, + PCR_PSFX_T0_SHDW_PCIEN_FUNDIS); +} #include "ux.h" @@ -164,6 +183,17 @@ void mainboard_romstage_entry(void) timestamp_add_now(TS_CSE_FW_SYNC_END); } + /* Program to Disable UFS Controllers */ + if (!is_devfn_enabled(PCH_DEVFN_UFS) && + (CONFIG(USE_UNIFIED_AP_FIRMWARE_FOR_UFS_AND_NON_UFS))) { + printk(BIOS_INFO, "Disabling UFS controllers\n"); + disable_ufs(); + if (ps->prev_sleep_state == ACPI_S5) { + printk(BIOS_INFO, "Warm Reset after disabling UFS controllers\n"); + system_reset(); + } + } + /* Program MCHBAR, DMIBAR, GDXBAR and EDRAMBAR */ systemagent_early_init(); /* Program SMBus base address and enable it */ |