From 19d56e392f87341e7abb26639e9b257aa78d4c92 Mon Sep 17 00:00:00 2001
From: Michael Gernoth <michael@gernoth.net>
Date: Mon, 23 Aug 2010 12:19:05 +0200
Subject: [PATCH] start implementing power/reset handling as needed on PCs

---
 bmc/chassis.c | 66 +++++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 61 insertions(+), 5 deletions(-)

diff --git a/bmc/chassis.c b/bmc/chassis.c
index fd48866..1b6822e 100644
--- a/bmc/chassis.c
+++ b/bmc/chassis.c
@@ -3,10 +3,66 @@
 
 #include "chassis.h"
 
+#ifdef __AVR_ATmega16__
+#define CHASSISPORT B
+#define POWER_PIN 0
+#define RESET_PIN 1
+#define ACTIVE_LOW
+#else
+#error "Please add chassis power/reset-PIN information for this chip"
+#endif
+
+#define __CPORT(port) PORT##port
+#define _CPORT(port) __CPORT(port)
+#define CPORT _CPORT(CHASSISPORT)
+
+#define __CDDR(port) DDR##port
+#define _CDDR(port) __CDDR(port)
+#define CDDR _CDDR(CHASSISPORT)
+
+static void chassis_set_pins(uint8_t pins, uint8_t state);
+
 void chassis_init()
 {
-	DDRB = 0xff;
-	PORTB = 0xff;
+	chassis_set_pins((1<<POWER_PIN) | (1<<RESET_PIN), 0);
+	CDDR |= ((1<<POWER_PIN) | (1<<RESET_PIN));
+}
+
+static void chassis_set_pins(uint8_t pins, uint8_t state)
+{
+#ifdef ACTIVE_LOW
+	state = !state;
+#endif
+
+	if(state) {
+		CPORT |= pins;
+	} else {
+		CPORT &= ~pins;
+	}
+}
+
+static void chassis_power(int msec)
+{
+	volatile int i;
+
+	chassis_set_pins((1<<POWER_PIN), 1);
+
+	/* FIXME */
+	for(i = 0; i < (msec<<2); i++);
+
+	chassis_set_pins((1<<POWER_PIN), 0);
+}
+
+static void chassis_reset(int msec)
+{
+	volatile int i;
+
+	chassis_set_pins((1<<RESET_PIN), 1);
+
+	/* FIXME */
+	for(i = 0; i < (msec<<2); i++);
+
+	chassis_set_pins((1<<RESET_PIN), 0);
 }
 
 void chassis_control(unsigned char action)
@@ -17,15 +73,15 @@ void chassis_control(unsigned char action)
 
 	switch(action) {
 		case CHASSIS_ACTION_POWER_DOWN:
-			PORTB=0xff;
+			chassis_power(5000);
 			break;
 
 		case CHASSIS_ACTION_POWER_UP:
-			PORTB=0x00;
+			chassis_power(500);
 			break;
 
 		case CHASSIS_ACTION_HARD_RESET:
-			PORTB=0x55;
+			chassis_reset(500);
 			break;
 
 		default:
-- 
2.39.2