ARM: UniPhier: add DDR PHY training code

This training code provides run-time adjustment of DDR PHY parameters
for stable DDR operation.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>

1 files changed, 172 insertions, 0 deletions

diff --git a/arch/arm/include/asm/arch-uniphier/ddrphy-regs.h b/arch/arm/include/asm/arch-uniphier/ddrphy-regs.h
new file mode 100644
index 0000000..484559c
--- /dev/null
+++ b/arch/arm/include/asm/arch-uniphier/ddrphy-regs.h
@@ -0,0 +1,172 @@
+/*
+ * UniPhier DDR PHY registers
+ *
+ * Copyright (C) 2014 Panasonic Corporation
+ *   Author: Masahiro Yamada <yamada.m@jp.panasonic.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef ARCH_DDRPHY_REGS_H
+#define ARCH_DDRPHY_REGS_H
+
+#include <linux/compiler.h>
+
+#ifndef __ASSEMBLY__
+
+struct ddrphy {
+	u32 ridr;		/* Revision Identification Register */
+	u32 pir;		/* PHY Initialixation Register */
+	u32 pgcr[2];		/* PHY General Configuration Register */
+	u32 pgsr[2];		/* PHY General Status Register */
+	u32 pllcr;		/* PLL Control Register */
+	u32 ptr[5];		/* PHY Timing Register */
+	u32 acmdlr;		/* AC Master Delay Line Register */
+	u32 acbdlr;		/* AC Bit Delay Line Register */
+	u32 aciocr;		/* AC I/O Configuration Register */
+	u32 dxccr;		/* DATX8 Common Configuration Register */
+	u32 dsgcr;		/* DDR System General Configuration Register */
+	u32 dcr;		/* DRAM Configuration Register */
+	u32 dtpr[3];		/* DRAM Timing Parameters Register */
+	u32 mr0;		/* Mode Register 0 */
+	u32 mr1;		/* Mode Register 1 */
+	u32 mr2;		/* Mode Register 2 */
+	u32 mr3;		/* Mode Register 3 */
+	u32 odtcr;		/* ODT Configuration Register */
+	u32 dtcr;		/* Data Training Configuration Register */
+	u32 dtar[4];		/* Data Training Address Register */
+	u32 dtdr[2];		/* Data Training Data Register */
+	u32 dtedr[2];		/* Data Training Eye Data Register */
+	u32 rsv0[13];		/* Reserved */
+	u32 dcuar;		/* DCU Address Register */
+	u32 dcudr;		/* DCU Data Register */
+	u32 dcurr;		/* DCU Run Register */
+	u32 dculr;		/* DCU Loop Register */
+	u32 dcugcr;		/* DCU General Configuration Register */
+	u32 dcutpr;		/* DCU Timing Parameters Register */
+	u32 dcusr[2];		/* DCU Status Register */
+	u32 rsv1[8];		/* Reserved */
+	u32 bistrr;		/* BIST Run Register */
+	u32 bistwcr;		/* BIST Word Count Register */
+	u32 bistmskr[3];	/* BIST Mask Register */
+	u32 bistlsr;		/* BIST LFSR Sed Register */
+	u32 bistar[3];		/* BIST Address Register */
+	u32 bistudpr;		/* BIST User Data Pattern Register */
+	u32 bistgsr;		/* BIST General Status Register */
+	u32 bistwer;		/* BIST Word Error Register */
+	u32 bistber[4];		/* BIST Bit Error Register */
+	u32 bistwcsr;		/* BIST Word Count Status Register */
+	u32 bistfwr[3];		/* BIST Fail Word Register */
+	u32 rsv2[10];		/* Reserved */
+	u32 gpr[2];		/* General Purpose Register */
+	struct ddrphy_zq {	/* ZQ */
+		u32 cr[2];	/* Impedance Control Register */
+		u32 sr[2];	/* Impedance Status Register */
+	} zq[4];
+	struct ddrphy_datx8 {	/* DATX8 */
+		u32 gcr;	/* General Configuration Register */
+		u32 gsr[2];	/* General Status Register */
+		u32 bdlr[5];	/* Bit Delay Line Register */
+		u32 lcdlr[3];	/* Local Calibrated Delay Line Register */
+		u32 mdlr;	/* Master Delay Line Register */
+		u32 gtr;	/* General Timing Register */
+		u32 rsv[3];	/* Reserved */
+	} dx[9];
+} __packed;
+
+#endif /* __ASSEMBLY__ */
+
+#define PIR_INIT		(1 <<  0)	/* Initialization Trigger */
+#define PIR_ZCAL		(1 <<  1)	/* Impedance Calibration */
+#define PIR_PLLINIT		(1 <<  4)	/* PLL Initialization */
+#define PIR_DCAL		(1 <<  5)	/* DDL Calibration */
+#define PIR_PHYRST		(1 <<  6)	/* PHY Reset */
+#define PIR_DRAMRST		(1 <<  7)	/* DRAM Reset */
+#define PIR_DRAMINIT		(1 <<  8)	/* DRAM Initialization */
+#define PIR_WL			(1 <<  9)	/* Write Leveling */
+#define PIR_QSGATE		(1 << 10)	/* Read DQS Gate Training */
+#define PIR_WLADJ		(1 << 11)	/* Write Leveling Adjust */
+#define PIR_RDDSKW		(1 << 12)	/* Read Data Bit Deskew */
+#define PIR_WRDSKW		(1 << 13)	/* Write Data Bit Deskew */
+#define PIR_RDEYE		(1 << 14)	/* Read Data Eye Training */
+#define PIR_WREYE		(1 << 15)	/* Write Data Eye Training */
+#define PIR_LOCKBYP		(1 << 28)	/* PLL Lock Bypass */
+#define PIR_DCALBYP		(1 << 29)	/* DDL Calibration Bypass */
+#define PIR_ZCALBYP		(1 << 30)	/* Impedance Calib Bypass */
+#define PIR_INITBYP		(1 << 31)	/* Initialization Bypass */
+
+#define PGSR0_IDONE		(1 <<  0)	/* Initialization Done */
+#define PGSR0_PLDONE		(1 <<  1)	/* PLL Lock Done */
+#define PGSR0_DCDONE		(1 <<  2)	/* DDL Calibration Done */
+#define PGSR0_ZCDONE		(1 <<  3)	/* Impedance Calibration Done */
+#define PGSR0_DIDONE		(1 <<  4)	/* DRAM Initialization Done */
+#define PGSR0_WLDONE		(1 <<  5)	/* Write Leveling Done */
+#define PGSR0_QSGDONE		(1 <<  6)	/* DQS Gate Training Done */
+#define PGSR0_WLADONE		(1 <<  7)	/* Write Leveling Adjust Done */
+#define PGSR0_RDDONE		(1 <<  8)	/* Read Bit Deskew Done */
+#define PGSR0_WDDONE		(1 <<  9)	/* Write Bit Deskew Done */
+#define PGSR0_REDONE		(1 << 10)	/* Read Eye Training Done */
+#define PGSR0_WEDONE		(1 << 11)	/* Write Eye Training Done */
+#define PGSR0_IERR		(1 << 16)	/* Initialization Error */
+#define PGSR0_PLERR		(1 << 17)	/* PLL Lock Error */
+#define PGSR0_DCERR		(1 << 18)	/* DDL Calibration Error */
+#define PGSR0_ZCERR		(1 << 19)	/* Impedance Calib Error */
+#define PGSR0_DIERR		(1 << 20)	/* DRAM Initialization Error */
+#define PGSR0_WLERR		(1 << 21)	/* Write Leveling Error */
+#define PGSR0_QSGERR		(1 << 22)	/* DQS Gate Training Error */
+#define PGSR0_WLAERR		(1 << 23)	/* Write Leveling Adj Error */
+#define PGSR0_RDERR		(1 << 24)	/* Read Bit Deskew Error */
+#define PGSR0_WDERR		(1 << 25)	/* Write Bit Deskew Error */
+#define PGSR0_REERR		(1 << 26)	/* Read Eye Training Error */
+#define PGSR0_WEERR		(1 << 27)	/* Write Eye Training Error */
+#define PGSR0_DTERR_SHIFT	28		/* Data Training Error Status*/
+#define PGSR0_DTERR		(7 << (PGSR0_DTERR_SHIFT))
+#define PGSR0_APLOCK		(1 << 31)	/* AC PLL Lock */
+
+#define DXCCR_DQSRES_OPEN	(0 << 5)
+#define DXCCR_DQSRES_688_OHM	(1 << 5)
+#define DXCCR_DQSRES_611_OHM	(2 << 5)
+#define DXCCR_DQSRES_550_OHM	(3 << 5)
+#define DXCCR_DQSRES_500_OHM	(4 << 5)
+#define DXCCR_DQSRES_458_OHM	(5 << 5)
+#define DXCCR_DQSRES_393_OHM	(6 << 5)
+#define DXCCR_DQSRES_344_OHM	(7 << 5)
+
+#define DXCCR_DQSNRES_OPEN	(0 << 9)
+#define DXCCR_DQSNRES_688_OHM	(1 << 9)
+#define DXCCR_DQSNRES_611_OHM	(2 << 9)
+#define DXCCR_DQSNRES_550_OHM	(3 << 9)
+#define DXCCR_DQSNRES_500_OHM	(4 << 9)
+#define DXCCR_DQSNRES_458_OHM	(5 << 9)
+#define DXCCR_DQSNRES_393_OHM	(6 << 9)
+#define DXCCR_DQSNRES_344_OHM	(7 << 9)
+
+#define DTCR_DTRANK_SHIFT	4		/* Data Training Rank */
+#define DTCR_DTRANK_MASK	(0x3 << (DTCR_DTRANK_SHIFT))
+#define DTCR_DTMPR		(1 << 6)	/* Data Training using MPR */
+#define DTCR_RNKEN_SHIFT	24		/* Rank Enable */
+#define DTCR_RNKEN_MASK		(0xf << (DTCR_RNKEN_SHIFT))
+
+#define DXGCR_WLRKEN_SHIFT	26		/* Write Level Rank Enable */
+#define DXGCR_WLRKEN_MASK	(0xf << (DXGCR_WLRKEN_SHIFT))
+
+/* SoC-specific parameters */
+#define NR_DATX8_PER_DDRPHY	2
+
+#if defined(CONFIG_MACH_PH1_LD4) || defined(CONFIG_MACH_PH1_SLD8)
+#define NR_DDRPHY_PER_CH		1
+#else
+#define NR_DDRPHY_PER_CH		2
+#endif
+
+#define NR_DDRCH		2
+
+#define DDRPHY_BASE(ch, phy)	(0x5bc01000 + 0x200000 * (ch) + 0x1000 * (phy))
+
+#ifndef __ASSEMBLY__
+void ddrphy_init(struct ddrphy __iomem *phy, int freq, int size);
+void ddrphy_prepare_training(struct ddrphy __iomem *phy, int rank);
+int ddrphy_training(struct ddrphy __iomem *phy);
+#endif
+
+#endif /* ARCH_DDRPHY_REGS_H */