first and last commit

platform/s5l8950x/amc/amc.c

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+/*
+ * Copyright (C) 2010-2014 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 <drivers/amc/amc.h>
+#include <drivers/amc/amc_phy.h>
+#include <drivers/amc/amc_regs.h>
+#include <drivers/dram.h>
+#include <drivers/miu.h>
+#include <sys.h>
+
+int mcu_initialize_dram (bool resume)
+{
+	return amc_init(resume);
+}
+
+void mcu_bypass_prep (int step)
+{
+	amc_phy_bypass_prep(step);
+}
+
+uint64_t mcu_get_memory_size (void)
+{
+	return amc_get_memory_size();
+}
+
+void amc_configure_address_decoding_and_mapping (void)
+{
+	amc_configure_default_address_decoding_and_mapping();
+}
+
+void amc_enable_slow_boot (bool enable)
+{
+	int slow_freqsel;
+	
+	if (enable) {
+		if ((amc_params.flags & FLAG_AMC_PARAM_SLOW_BOOT) == false) {
+			rAMC_FREQSEL = amc_params.freqsel;
+			return;
+		}
+
+		slow_freqsel = 3;
+		rAMC_BOOTCLK = (amc_params.bootclkdivsr << 8) | 1;
+		spin(1);
+		rAMC_FREQSEL = slow_freqsel;
+		amc_phy_scale_dll(slow_freqsel, amc_params.bootclkdivsr);		
+	} else {
+		if ((amc_params.flags & FLAG_AMC_PARAM_SLOW_BOOT) == false) {
+			return;
+		}
+		
+		rAMC_PWRMNGTPARAM = amc_params.pwrmngtparam_small;
+		spin(2);
+
+		rAMC_BOOTCLK &= ~1;
+		spin(1);
+		rAMC_FREQSEL = amc_params.freqsel;
+		amc_phy_scale_dll(amc_params.freqsel, 1);
+
+		rAMC_PWRMNGTPARAM = amc_params.pwrmngtparam_guided;
+	}
+}
+
+void amc_finalize (bool resume)
+{
+	uint8_t odts;
+
+#if SUPPORT_FPGA
+	rAMC_PWRMNGTEN |= 0x00000001;			// Sharing clocks between channels so do not enable clock stopping for PD or SR
+#else
+	rAMC_PWRMNGTEN |= 0x00011011;
+#endif
+
+	rAMC_AREFPARAM |= (0x00001000);			// Turn on freq change waiting for refresh and self-refresh exit
+
+	amc_mrcmd(MR_READ, AMC_NUM_CHANNELS, AMC_NUM_RANKS, 0x4, (uintptr_t)&odts);
+	rAMC_ODTS      = 0x00010320;			// [16] => TempDrtEn, [9:0] RdIntrvl XXX based on tREFI
+
+	if (!resume) {
+		amc_enable_autorefresh();
+	}
+
+#if SUPPORT_FPGA
+	rAMC_FREQSEL = amc_params.freqsel;
+#endif
+
+#if !SUPPORT_FPGA
+	// Turn of Fast Critical Word Forwarding feature and AIU CWF feature
+	// Disabled for NRT <rdar://problem/9416881>
+	rAMC_AIUPRT_RD_CWF     = 0x00161600;
+	rAMC_QBRPARAM          = 0x00810000;
+	rAMC_QBREN             = 0x00111001;
+#endif
+}
+
+void amc_dram_workarounds (bool resume)
+{
+	const struct amc_memory_device_info *dev_info;
+	
+	dev_info = amc_get_memory_device_info();
+	
+	switch (dev_info->vendor_id) {			
+		case JEDEC_MANUF_ID_HYNIX:
+			
+			if (dev_info->rev_id == 1 && dev_info->rev_id2 == 0) {
+				if (!resume) {
+					// TestMRS entry
+					amc_mrcmd(MR_WRITE, AMC_NUM_CHANNELS, AMC_NUM_RANKS, 0x9, 0xb0);
+					amc_mrcmd(MR_WRITE, AMC_NUM_CHANNELS, AMC_NUM_RANKS, 0x9, 0xe0);
+					amc_mrcmd(MR_WRITE, AMC_NUM_CHANNELS, AMC_NUM_RANKS, 0x9, 0x90);
+					
+					// <rdar://problem/10721112>					
+					// tRAS_min default
+					amc_mrcmd(MR_WRITE, AMC_NUM_CHANNELS, AMC_NUM_RANKS, 0x9, 0xee);
+					
+					// <rdar://problem/11216915>					
+					// LSAEN delay default
+					amc_mrcmd(MR_WRITE, AMC_NUM_CHANNELS, AMC_NUM_RANKS, 0x9, 0xef);
+				}
+			}
+			break;
+			
+		default:
+			break;
+	}
+	
+	return;
+}
+
+// Shift dq offset as needed.
+// In the future, it's possible the shift value changes based on SOC or DRAM vendor.
+// Thus, we need to have this function per SOC.
+void amc_dram_shift_dq_offset (int8_t *dq_offset, uint8_t num_bytes) {
+	int8_t shift_val;
+	uint8_t i;
+	const struct amc_memory_device_info *dev_info;
+	
+	dev_info = amc_get_memory_device_info();
+	
+	switch (dev_info->vendor_id) {			
+		case JEDEC_MANUF_ID_HYNIX:
+		case JEDEC_MANUF_ID_SAMSUNG:
+		case JEDEC_MANUF_ID_ELPIDA:
+			
+			// shift 2 steps
+			shift_val = -2;
+			break;
+			
+		default:
+			shift_val = 0;
+			break;
+	}
+	
+	for (i = 0; i < num_bytes; i++)
+		dq_offset[i] += shift_val;	
+}

platform/s5l8950x/amc/rules.mk

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+# 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_AMC=1
+
+ALL_OBJS += \
+	$(LOCAL_DIR)/amc.o