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-rw-r--r--src/southbridge/amd/sb700/sm.c45
1 files changed, 31 insertions, 14 deletions
diff --git a/src/southbridge/amd/sb700/sm.c b/src/southbridge/amd/sb700/sm.c
index 83a722bcb2..c15ec567e1 100644
--- a/src/southbridge/amd/sb700/sm.c
+++ b/src/southbridge/amd/sb700/sm.c
@@ -2,6 +2,7 @@
* This file is part of the coreboot project.
*
* Copyright (C) 2010 Advanced Micro Devices, Inc.
+ * Copyright (C) 2015 Timothy Pearson <tpearson@raptorengineeringinc.com>, Raptor Engineering
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -33,18 +34,27 @@
#define NMI_OFF 0
-#define MAINBOARD_POWER_OFF 0
-#define MAINBOARD_POWER_ON 1
-
-#ifndef CONFIG_MAINBOARD_POWER_ON_AFTER_POWER_FAIL
-#define CONFIG_MAINBOARD_POWER_ON_AFTER_POWER_FAIL MAINBOARD_POWER_ON
-#endif
-
#define PRIMARY_SMBUS_RESOURCE_NUMBER 0x90
#define AUXILIARY_SMBUS_RESOURCE_NUMBER 0x58
uint8_t amd_sb700_aux_smbus = 0;
+enum power_mode {
+ POWER_MODE_OFF = 0,
+ POWER_MODE_ON = 1,
+ POWER_MODE_LAST = 2,
+};
+
+#ifndef CONFIG_MAINBOARD_POWER_ON_AFTER_POWER_FAIL
+#define CONFIG_MAINBOARD_POWER_ON_AFTER_POWER_FAIL POWER_MODE_ON
+#endif
+
+static const char* power_mode_names[] = {
+ [POWER_MODE_OFF] = "off",
+ [POWER_MODE_ON] = "on",
+ [POWER_MODE_LAST] = "last",
+};
+
/*
* SB700 enables all USB controllers by default in SMBUS Control.
* SB700 enables SATA by default in SMBUS Control.
@@ -56,7 +66,7 @@ static void sm_init(device_t dev)
u8 rev;
u32 dword;
void *ioapic_base;
- u32 on;
+ uint32_t power_state;
u32 nmi_option;
printk(BIOS_INFO, "sm_init().\n");
@@ -126,16 +136,23 @@ static void sm_init(device_t dev)
pm_iowrite(0x53, byte);
/* power after power fail */
- on = CONFIG_MAINBOARD_POWER_ON_AFTER_POWER_FAIL;
- get_option(&on, "power_on_after_fail");
+ power_state = CONFIG_MAINBOARD_POWER_ON_AFTER_POWER_FAIL;
+ get_option(&power_state, "power_on_after_fail");
+ if (power_state > 2) {
+ printk(BIOS_WARNING, "Invalid power_on_after_fail setting, using default\n");
+ power_state = CONFIG_MAINBOARD_POWER_ON_AFTER_POWER_FAIL;
+ }
byte = pm_ioread(0x74);
byte &= ~0x03;
- if (on) {
- byte |= 2;
- }
+ if (power_state == POWER_MODE_OFF)
+ byte |= 0x0;
+ else if (power_state == POWER_MODE_ON)
+ byte |= 0x1;
+ else if (power_state == POWER_MODE_LAST)
+ byte |= 0x2;
byte |= 1 << 2;
pm_iowrite(0x74, byte);
- printk(BIOS_INFO, "set power %s after power fail\n", on ? "on" : "off");
+ printk(BIOS_INFO, "set power \"%s\" after power fail\n", power_mode_names[power_state]);
byte = pm_ioread(0x68);
byte &= ~(1 << 1);