first and last commit

drivers/samsung/dwi/dwi.c

@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2011 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 <platform.h>
+#include <platform/clocks.h>
+#include <platform/soc/hwclocks.h>
+
+#include "dwi.h"
+
+#ifndef TARGET_DWI_FREQUENCY
+#error TARGET_DWI_FREQUENCY not defined by the target
+#endif
+
+#ifndef TARGET_DWI_TRANSFER_GAP_US
+#error TARGET_DWI_TRANSFER_GAP_US not defined by the target
+#endif
+
+int dwi_init(void)
+{
+	u_int32_t dwi_divider, dwi_transfer_gap;
+
+	clock_gate(CLK_DWI, true);
+
+	dwi_divider = (clock_get_frequency(CLK_NCLK) + TARGET_DWI_FREQUENCY - 1) / TARGET_DWI_FREQUENCY;
+	dwi_transfer_gap = (clock_get_frequency(CLK_NCLK) * TARGET_DWI_TRANSFER_GAP_US) / 1000000;
+
+	rDWI_CLOCK_CONFIG = DWI_CLOCK_CONFIG_CLOCK_SCALER(dwi_divider) | DWI_CLOCK_CONFIG_TX_CPHA_1;
+	rDWI_TRANSFER_GAP = dwi_transfer_gap;
+
+	return 0;
+}
+
+int dwi_send_backlight_command(uint32_t backlight_command, uint32_t backlight_level)
+{
+	rDWI_ITR0_TX_DATA = (backlight_command << 28) | (backlight_level & 0x7FF);
+	rDWI_ITR0_CONTROL = DWI_TR_CTRL_BYTE_SWAP | DWI_TR_CTRL_BYTE_CNT(4) | DWI_TR_CTRL_TRAN_EN;
+
+	return 0;
+}

drivers/samsung/dwi/dwi.h

@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2011 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 __SAMSUNG_DWI_H
+#define __SAMSUNG_DWI_H
+
+#include <platform/soc/hwregbase.h>
+
+#define rDWI_CLOCK_CONFIG		(*(volatile u_int32_t *)(DWI_BASE_ADDR + 0x0000))
+#define  DWI_CLOCK_CONFIG_TX_CPHA_1	(1 << 0)
+#define  DWI_CLOCK_CONFIG_TX_CPHA_2	(0 << 0)
+#define  DWI_CLOCK_CONFIG_RX_CPHA_1	(1 << 1)
+#define  DWI_CLOCK_CONFIG_RX_CPHA_2	(0 << 1)
+#define  DWI_CLOCK_CONFIG_CPOL_LOW	(0 << 2)
+#define  DWI_CLOCK_CONFIG_CPOL_HIGH	(1 << 2)
+#define  DWI_CLOCK_CONFIG_CLOCK_SCALER(_x)	(((_x) - 1) << 16)
+#define rDWI_TRANSFER_GAP		(*(volatile u_int32_t *)(DWI_BASE_ADDR + 0x0004))
+#define rDWI_ITR0_CONTROL		(*(volatile u_int32_t *)(DWI_BASE_ADDR + 0x0010))
+#define  DWI_TR_CTRL_TRAN_EN		(1 << 0)
+#define  DWI_TR_CTRL_BYTE_CNT(_c)	(((_c) - 1) << 4)
+#define  DWI_TR_CTRL_BYTE_SWAP		(1 << 6)
+#define  DWI_TR_CTRL_BIT_ORDER		(1 << 7)
+#define  DWI_TR_CTRL_INT_EN		(1 << 8)
+#define rDWI_ITR0_TX_DATA		(*(volatile u_int32_t *)(DWI_BASE_ADDR + 0x0014))
+#define rDWI_ITR0_RX_DATA		(*(volatile u_int32_t *)(DWI_BASE_ADDR + 0x0018))
+#define rDWI_ITR0_INT_STATUS		(*(volatile u_int32_t *)(DWI_BASE_ADDR + 0x001C))
+#define rDWI_ITR1_CONTROL		(*(volatile u_int32_t *)(DWI_BASE_ADDR + 0x0020))
+#define rDWI_ITR1_TX_DATA		(*(volatile u_int32_t *)(DWI_BASE_ADDR + 0x0024))
+#define rDWI_ITR1_RX_DATA		(*(volatile u_int32_t *)(DWI_BASE_ADDR + 0x0028))
+#define rDWI_ITR1_INT_STATUS		(*(volatile u_int32_t *)(DWI_BASE_ADDR + 0x002C))
+#define rDWI_ITR1_RAMP_COUNT		(*(volatile u_int32_t *)(DWI_BASE_ADDR + 0x0030))
+#define rDWI_ITR1_DELTAV_ACTIVE		(*(volatile u_int32_t *)(DWI_BASE_ADDR + 0x0034))
+#define rDWI_STR_CONTROL		(*(volatile u_int32_t *)(DWI_BASE_ADDR + 0x0040))
+#define rDWI_STR_TX_DATA		(*(volatile u_int32_t *)(DWI_BASE_ADDR + 0x0044))
+#define rDWI_STR_RX_DATA		(*(volatile u_int32_t *)(DWI_BASE_ADDR + 0x0048))
+#define rDWI_STR_INT_STATUS		(*(volatile u_int32_t *)(DWI_BASE_ADDR + 0x004C))
+#define rDWI_STR_DELAY			(*(volatile u_int32_t *)(DWI_BASE_ADDR + 0x0050))
+#define rDWI_VERSION			(*(volatile u_int32_t *)(DWI_BASE_ADDR + 0x0070))
+
+#endif /* ! __SAMSUNG_DWI_H */

drivers/samsung/dwi/rules.mk

@@ -0,0 +1,15 @@
+# Copyright (C) 2011 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_DWI=1
+
+ALL_OBJS += $(LOCAL_DIR)/dwi.o