first and last commit

drivers/samsung/rosc/rosc.c

@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2009 Apple Inc. All rights reserved.
+ *
+ * This document is the property of Apple Inc.
+ * It is considered confidential and proprietary.
+ *
+ * This document may not be reproduced or transmitted in any form,
+ * in whole or in part, without the express written permission of
+ * Apple Inc.
+ */
+#include <debug.h>
+#include <sys/menu.h>
+#include <platform/clocks.h>
+#include <platform/soc/hwregbase.h>
+#include <platform/soc/hwclocks.h>
+
+#include "rosc.h"
+
+static void rosc_ops(int location, int type, int period);
+
+static void rosc_ops(int location, int type, int period)
+{
+	u_int32_t	coe = 0;
+
+#if ROSC_WITH_CLOCK
+	clock_gate(CLK_ROSC, true);
+#endif
+	coe = ROSC_PRESCALE * (clock_get_frequency(CLK_PCLK)/ROSC_INTERVAL);
+	/* NOP */
+	rROSC_CMD = ROSC_CMD_NOP;
+	while ((rROSC_CMD & ROSC_CMD_STOP) != 0);
+	/* Configure the ring osc */
+	rROSC_CFG = ROSC_CFG_INT_DURATION | (1<<(ROSC_VTH - type + 3)) | (location<<0);
+	if (!period) {
+		u_int32_t	res = 0;
+		/* one shot */
+		rROSC_CUR_STAT = 0;
+		rROSC_CMD = ROSC_CMD_RUN_ONCE;
+		spin(1 * 1000);
+		while ((rROSC_CMD & ROSC_CMD_STOP) != 0) {
+		}
+		res = rROSC_CUR_STAT;
+		printf(" current: %dMHz\n", ((res + 2) * coe)/ROSC_1MHZ);
+	} else {
+		u_int32_t	res1 = 0;
+		u_int32_t	res2 = 0;
+
+		/* Free run */
+		rROSC_MAX_STAT = 0;
+		rROSC_MIN_STAT = 0xFFF;
+		rROSC_CMD = ROSC_CMD_START;
+		spin(period * 1000);
+		rROSC_CMD = ROSC_CMD_STOP;
+
+		while ((rROSC_CMD & ROSC_CMD_STOP) != 0) {
+		}
+		res1 = rROSC_MAX_STAT;
+		res2 = rROSC_MIN_STAT;
+		printf(" maximum: %dMHz, minimum %dMHz\n", ((res1 + 2) * coe)/ROSC_1MHZ, ((res2 + 2) * coe)/ROSC_1MHZ);
+
+	}
+#if ROSC_WITH_CLOCK
+	clock_gate(CLK_ROSC, false);
+#endif
+	return;
+}
+
+#if defined(WITH_MENU) && WITH_MENU
+
+static int do_rosc(int argc, struct cmd_arg *args)
+{
+	int period;
+
+	if (!security_allow_modes(kSecurityModeHWAccess)) {
+		printf("Permission Denied\n");
+		return -1;
+	}
+	if (argc < 2)
+		period = 0;
+	else
+		period = args[1].u;
+
+	if (period) {
+		printf("Ring OSC clock test in free run mode for %d mili seconds\n", period);
+	} else {
+		printf("Ring OSC clock test in one shot mode\n");
+	}
+
+	for (int i = 0; i <  ROSC_NUM; i++) {
+		for (int j = 0; j < ROSC_VTH; j++) {
+			if ((1<<(i + j * 5)) & ROSC_MASK) {
+				switch (j) {
+					case 0:
+						printf("  HVT%d", i);
+						break;
+					case 1:
+						printf("  RVT%d", i);
+						break;
+					case 2:
+						printf("  LVT%d", i);
+						break;
+					default:
+						break;
+				}
+				rosc_ops(i, j, period);
+			}
+		}
+	}
+	return 0;
+}
+MENU_COMMAND_DEBUG(rosc, do_rosc, "Ring OSC reading", NULL);
+
+#endif

drivers/samsung/rosc/rosc.h

@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2009 Apple Inc. All rights reserved.
+ *
+ * This document is the property of Apple Inc.
+ * It is considered confidential and proprietary.
+ *
+ * This document may not be reproduced or transmitted in any form,
+ * in whole or in part, without the express written permission of
+ * Apple Inc.
+ */
+#ifndef __APPLE_ROSC_H
+#define __APPLE_ROSC_H
+
+#include <platform/soc/hwregbase.h>
+
+#define ROSC_INTERVAL		0x40000
+#define ROSC_PRESCALE		0x100
+#define ROSC_VTH		(3)
+#define ROSC_NUM		(5)
+
+#define rROSC_CMD		(*(volatile u_int32_t *)(ROSC_BASE_ADDR + 0x000000))
+#define rROSC_CFG		(*(volatile u_int32_t *)(ROSC_BASE_ADDR + 0x000004))
+#define rROSC_CUR_STAT		(*(volatile u_int32_t *)(ROSC_BASE_ADDR + 0x000008))
+#define rROSC_MAX_STAT		(*(volatile u_int32_t *)(ROSC_BASE_ADDR + 0x00000c))
+#define rROSC_MIN_STAT		(*(volatile u_int32_t *)(ROSC_BASE_ADDR + 0x000010))
+#define rROSC_VER		(*(volatile u_int32_t *)(ROSC_BASE_ADDR + 0x0000A0))
+
+#define ROSC_CMD_NOP		(0<<0)
+#define ROSC_CMD_RUN_ONCE	(1<<0)
+#define ROSC_CMD_START		(2<<0)
+#define ROSC_CMD_STOP		(3<<0)
+
+#define ROSC_CFG_INT_DURATION	((ROSC_INTERVAL-1)<<8)
+#define ROSC_1MHZ		1000000
+#endif /* ! __APPLE_ROSC_H */

drivers/samsung/rosc/rules.mk

@@ -0,0 +1,16 @@
+# Copyright (C) 2009 Apple Inc. All rights reserved.
+#
+# This document is the property of Apple Inc.
+# It is considered confidential and proprietary.
+#
+# This document may not be reproduced or transmitted in any form,
+# in whole or in part, without the express written permission of
+# Apple Inc.
+#
+LOCAL_DIR := $(GET_LOCAL_DIR)
+
+OPTIONS += \
+	WITH_HW_ROSC=1
+
+ALL_OBJS += \
+	$(LOCAL_DIR)/rosc.o