ARM: uniphier: show STM (SCP) status on boot and pinmon command
The SCP (System Control Processor) or what we call STM (Stand-by
MPU) is integrated in LD4, Pro4, sLD8, LD6b, LD11, and LD20.
For these SoCs, show the information if STM is enabled.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/arch/arm/mach-uniphier/boot-device/boot-device.c b/arch/arm/mach-uniphier/boot-device/boot-device.c
index 5ec0b5b..0080977 100644
--- a/arch/arm/mach-uniphier/boot-device/boot-device.c
+++ b/arch/arm/mach-uniphier/boot-device/boot-device.c
@@ -22,6 +22,7 @@
const unsigned int *boot_device_count;
int (*boot_device_is_usb)(u32 pinmon);
unsigned int (*boot_device_fixup)(unsigned int mode);
+ int have_internal_stm;
};
static const struct uniphier_boot_device_info uniphier_boot_device_info[] = {
@@ -31,6 +32,7 @@
.boot_device_sel_shift = 0,
.boot_device_table = uniphier_sld3_boot_device_table,
.boot_device_count = &uniphier_sld3_boot_device_count,
+ .have_internal_stm = 0,
},
#endif
#if defined(CONFIG_ARCH_UNIPHIER_LD4)
@@ -39,6 +41,7 @@
.boot_device_sel_shift = 1,
.boot_device_table = uniphier_ld4_boot_device_table,
.boot_device_count = &uniphier_ld4_boot_device_count,
+ .have_internal_stm = 1,
},
#endif
#if defined(CONFIG_ARCH_UNIPHIER_PRO4)
@@ -47,6 +50,7 @@
.boot_device_sel_shift = 1,
.boot_device_table = uniphier_ld4_boot_device_table,
.boot_device_count = &uniphier_ld4_boot_device_count,
+ .have_internal_stm = 0,
},
#endif
#if defined(CONFIG_ARCH_UNIPHIER_SLD8)
@@ -55,6 +59,7 @@
.boot_device_sel_shift = 1,
.boot_device_table = uniphier_ld4_boot_device_table,
.boot_device_count = &uniphier_ld4_boot_device_count,
+ .have_internal_stm = 1,
},
#endif
#if defined(CONFIG_ARCH_UNIPHIER_PRO5)
@@ -63,6 +68,7 @@
.boot_device_sel_shift = 1,
.boot_device_table = uniphier_pro5_boot_device_table,
.boot_device_count = &uniphier_pro5_boot_device_count,
+ .have_internal_stm = 0,
},
#endif
#if defined(CONFIG_ARCH_UNIPHIER_PXS2)
@@ -73,6 +79,7 @@
.boot_device_count = &uniphier_pxs2_boot_device_count,
.boot_device_is_usb = uniphier_pxs2_boot_device_is_usb,
.boot_device_fixup = uniphier_pxs2_boot_device_fixup,
+ .have_internal_stm = 0,
},
#endif
#if defined(CONFIG_ARCH_UNIPHIER_LD6B)
@@ -83,6 +90,7 @@
.boot_device_count = &uniphier_pxs2_boot_device_count,
.boot_device_is_usb = uniphier_pxs2_boot_device_is_usb,
.boot_device_fixup = uniphier_pxs2_boot_device_fixup,
+ .have_internal_stm = 1, /* STM on A-chip */
},
#endif
#if defined(CONFIG_ARCH_UNIPHIER_LD11)
@@ -93,6 +101,7 @@
.boot_device_count = &uniphier_ld11_boot_device_count,
.boot_device_is_usb = uniphier_ld11_boot_device_is_usb,
.boot_device_fixup = uniphier_ld11_boot_device_fixup,
+ .have_internal_stm = 1,
},
#endif
#if defined(CONFIG_ARCH_UNIPHIER_LD20)
@@ -103,6 +112,7 @@
.boot_device_count = &uniphier_ld11_boot_device_count,
.boot_device_is_usb = uniphier_ld20_boot_device_is_usb,
.boot_device_fixup = uniphier_ld11_boot_device_fixup,
+ .have_internal_stm = 1,
},
#endif
};
@@ -161,6 +171,24 @@
info->boot_device_fixup(raw_mode) : raw_mode;
}
+int uniphier_have_internal_stm(void)
+{
+ const struct uniphier_boot_device_info *info;
+
+ info = uniphier_get_boot_device_info();
+ if (!info) {
+ pr_err("unsupported SoC\n");
+ return -ENOTSUPP;
+ }
+
+ return info->have_internal_stm;
+}
+
+int uniphier_boot_from_backend(void)
+{
+ return !!(readl(SG_PINMON0) & BIT(27));
+}
+
#ifndef CONFIG_SPL_BUILD
static int do_pinmon(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
@@ -176,12 +204,16 @@
return CMD_RET_FAILURE;
}
- printf("Boot Swap: %s\n\n", boot_is_swapped() ? "ON" : "OFF");
+ if (uniphier_have_internal_stm())
+ printf("STB Micon: %s\n",
+ uniphier_boot_from_backend() ? "OFF" : "ON");
+
+ printf("Boot Swap: %s\n", boot_is_swapped() ? "ON" : "OFF");
pinmon = readl(SG_PINMON0);
if (info->boot_device_is_usb)
- printf("USB Boot: %s\n\n",
+ printf("USB Boot: %s\n",
info->boot_device_is_usb(pinmon) ? "ON" : "OFF");
boot_device_count = *info->boot_device_count;
@@ -189,7 +221,7 @@
boot_sel = pinmon >> info->boot_device_sel_shift;
boot_sel &= boot_device_count - 1;
- printf("Boot Mode Sel:\n");
+ printf("\nBoot Mode Sel:\n");
for (i = 0; i < boot_device_count; i++)
printf(" %c %02x %s\n", i == boot_sel ? '*' : ' ', i,
info->boot_device_table[i].desc);