Commit f79753c3 authored by Tero Kristo's avatar Tero Kristo Committed by Lokesh Vutla
Browse files

cmd: ti: pd: Add debug command for K3 power domains



Add support command for debugging K3 power domains. This is useful with
the HSM rearch setup, where power domains are directly controlled by SPL
instead of going through the TI SCI layer. The debugging support is only
available in the u-boot codebase though, so the raw register access
power domain layer must be enabled on u-boot side for this to work. By
default, u-boot side uses the TI SCI layer, and R5 SPL only uses the
direct access methods.
Signed-off-by: default avatarTero Kristo <t-kristo@ti.com>
Signed-off-by: default avatarTero Kristo <kristo@kernel.org>
Reviewed-by: Jaehoon Chung's avatarJaehoon Chung <jh80.chung@samsung.com>
parent 144464bd
......@@ -7,4 +7,12 @@ config CMD_DDR3
supports memory verification, memory comapre and ecc
verification if supported.
config CMD_PD
bool "command for verifying power domains"
depends on TI_POWER_DOMAIN
help
Debug command for K3 power domains. For this to work, the
K3 power domain driver must be enabled for the u-boot; by
default it is only enabled for SPL.
endmenu
......@@ -5,4 +5,5 @@ obj- += dummy.o
ifndef CONFIG_SPL_BUILD
obj-$(CONFIG_CMD_DDR3) += ddr3.o
obj-$(CONFIG_CMD_PD) += pd.o
endif
// SPDX-License-Identifier: GPL-2.0+
/*
* Power Domain test commands
*
* Copyright (C) 2020 Texas Instruments Incorporated, <www.ti.com>
*/
#include <common.h>
#include <command.h>
#include <dm.h>
#include <k3-dev.h>
static const struct udevice_id ti_pd_of_match[] = {
{ .compatible = "ti,sci-pm-domain" },
{ /* sentinel */ }
};
static struct ti_k3_pd_platdata *ti_pd_find_data(void)
{
struct udevice *dev;
int i = 0;
while (1) {
uclass_get_device(UCLASS_POWER_DOMAIN, i++, &dev);
if (!dev)
return NULL;
if (device_is_compatible(dev,
ti_pd_of_match[0].compatible))
return dev_get_priv(dev);
}
return NULL;
}
static void dump_lpsc(struct ti_k3_pd_platdata *data, struct ti_pd *pd)
{
int i;
struct ti_lpsc *lpsc;
u8 state;
static const char * const lpsc_states[] = {
"swrstdis", "syncrst", "disable", "enable", "autosleep",
"autowake", "unknown",
};
for (i = 0; i < data->num_lpsc; i++) {
lpsc = &data->lpsc[i];
if (lpsc->pd != pd)
continue;
state = lpsc_get_state(lpsc);
if (state > ARRAY_SIZE(lpsc_states))
state = ARRAY_SIZE(lpsc_states) - 1;
printf(" LPSC%d: state=%s, usecount=%d\n",
lpsc->id, lpsc_states[state], lpsc->usecount);
}
}
static void dump_pd(struct ti_k3_pd_platdata *data, struct ti_psc *psc)
{
int i;
struct ti_pd *pd;
u8 state;
static const char * const pd_states[] = {
"off", "on", "unknown"
};
for (i = 0; i < data->num_pd; i++) {
pd = &data->pd[i];
if (pd->psc != psc)
continue;
state = ti_pd_state(pd);
if (state > ARRAY_SIZE(pd_states))
state = ARRAY_SIZE(pd_states) - 1;
printf(" PD%d: state=%s, usecount=%d:\n",
pd->id, pd_states[state], pd->usecount);
dump_lpsc(data, pd);
}
}
static void dump_psc(struct ti_k3_pd_platdata *data)
{
int i;
struct ti_psc *psc;
for (i = 0; i < data->num_psc; i++) {
psc = &data->psc[i];
printf("PSC%d [%p]:\n", psc->id, psc->base);
dump_pd(data, psc);
}
}
static int do_pd_dump(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
struct ti_k3_pd_platdata *data;
data = ti_pd_find_data();
if (!data)
return CMD_RET_FAILURE;
dump_psc(data);
return 0;
}
static int do_pd_endis(int argc, char *const argv[], u8 state)
{
u32 psc_id;
u32 lpsc_id;
int i;
struct ti_k3_pd_platdata *data;
struct ti_lpsc *lpsc;
int ret;
if (argc < 3)
return CMD_RET_FAILURE;
data = ti_pd_find_data();
if (!data)
return CMD_RET_FAILURE;
psc_id = simple_strtoul(argv[1], NULL, 10);
lpsc_id = simple_strtoul(argv[2], NULL, 10);
for (i = 0; i < data->num_lpsc; i++) {
lpsc = &data->lpsc[i];
if (lpsc->pd->psc->id != psc_id)
continue;
if (lpsc->id != lpsc_id)
continue;
printf("%s pd [PSC:%d,LPSC:%d]...\n",
state == MDSTAT_STATE_ENABLE ? "Enabling" : "Disabling",
psc_id, lpsc_id);
ret = ti_lpsc_transition(lpsc, state);
if (ret)
return CMD_RET_FAILURE;
else
return 0;
}
printf("No matching psc/lpsc found.\n");
return CMD_RET_FAILURE;
}
static int do_pd_enable(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
return do_pd_endis(argc, argv, MDSTAT_STATE_ENABLE);
}
static int do_pd_disable(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
return do_pd_endis(argc, argv, MDSTAT_STATE_SWRSTDISABLE);
}
static struct cmd_tbl cmd_pd[] = {
U_BOOT_CMD_MKENT(dump, 1, 0, do_pd_dump, "", ""),
U_BOOT_CMD_MKENT(enable, 3, 0, do_pd_enable, "", ""),
U_BOOT_CMD_MKENT(disable, 3, 0, do_pd_disable, "", ""),
};
static int ti_do_pd(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[])
{
struct cmd_tbl *c;
argc--;
argv++;
c = find_cmd_tbl(argv[0], cmd_pd, ARRAY_SIZE(cmd_pd));
if (c)
return c->cmd(cmdtp, flag, argc, argv);
else
return CMD_RET_USAGE;
}
U_BOOT_CMD(pd, 4, 1, ti_do_pd,
"TI power domain control",
#if CONFIG_IS_ENABLED(SYS_LONGHELP)
"dump - show power domain status\n"
"enable [psc] [lpsc] - enable power domain\n"
"disable [psc] [lpsc] - disable power domain\n"
#endif
);
......@@ -132,7 +132,7 @@ static void ti_pd_transition(struct ti_pd *pd)
psc_write(BIT(pd->id), pd->psc, PSC_PTCMD);
}
static u8 ti_pd_state(struct ti_pd *pd)
u8 ti_pd_state(struct ti_pd *pd)
{
return pd_read(pd, PSC_PDCTL) & PDCTL_STATE_MASK;
}
......@@ -227,12 +227,12 @@ static int ti_lpsc_wait(struct ti_lpsc *lpsc)
return ret;
}
static u8 lpsc_get_state(struct ti_lpsc *lpsc)
u8 lpsc_get_state(struct ti_lpsc *lpsc)
{
return lpsc_read(lpsc, PSC_MDCTL) & MDSTAT_STATE_MASK;
}
static int ti_lpsc_transition(struct ti_lpsc *lpsc, u8 state)
int ti_lpsc_transition(struct ti_lpsc *lpsc, u8 state)
{
struct ti_pd *psc_pd;
int ret;
......
......@@ -22,6 +22,11 @@
#define PSC_PD_ALWAYSON BIT(1)
#define PSC_PD_DEPENDS BIT(2)
#define MDSTAT_STATE_MASK 0x3f
#define MDSTAT_BUSY_MASK 0x30
#define MDSTAT_STATE_SWRSTDISABLE 0x0
#define MDSTAT_STATE_ENABLE 0x3
struct ti_psc {
int id;
void __iomem *base;
......@@ -73,4 +78,8 @@ struct ti_k3_pd_platdata {
extern const struct ti_k3_pd_platdata j721e_pd_platdata;
extern const struct ti_k3_pd_platdata j7200_pd_platdata;
u8 ti_pd_state(struct ti_pd *pd);
u8 lpsc_get_state(struct ti_lpsc *lpsc);
int ti_lpsc_transition(struct ti_lpsc *lpsc, u8 state);
#endif
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