path: root/arch/arm/mach-uniphier/dram/cmd_ddrphy.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2014      Panasonic Corporation
 * Copyright (C) 2015-2017 Socionext Inc.
 *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
 */

#include <command.h>
#include <stdio.h>
#include <linux/io.h>
#include <linux/printk.h>
#include <linux/sizes.h>

#include "../soc-info.h"
#include "ddrphy-regs.h"

/* Select either decimal or hexadecimal */
#if 1
#define PRINTF_FORMAT "%2d"
#else
#define PRINTF_FORMAT "%02x"
#endif
/* field separator */
#define FS "   "

#define ptr_to_uint(p)	((unsigned int)(unsigned long)(p))

#define UNIPHIER_MAX_NR_DDRPHY		4

struct uniphier_ddrphy_param {
	unsigned int soc_id;
	unsigned int nr_phy;
	struct {
		resource_size_t base;
		unsigned int nr_dx;
	} phy[UNIPHIER_MAX_NR_DDRPHY];
};

static const struct uniphier_ddrphy_param uniphier_ddrphy_param[] = {
	{
		.soc_id = UNIPHIER_LD4_ID,
		.nr_phy = 2,
		.phy = {
			{ .base = 0x5bc01000, .nr_dx = 2, },
			{ .base = 0x5be01000, .nr_dx = 2, },
		},
	},
	{
		.soc_id = UNIPHIER_PRO4_ID,
		.nr_phy = 4,
		.phy = {
			{ .base = 0x5bc01000, .nr_dx = 2, },
			{ .base = 0x5bc02000, .nr_dx = 2, },
			{ .base = 0x5be01000, .nr_dx = 2, },
			{ .base = 0x5be02000, .nr_dx = 2, },
		},
	},
	{
		.soc_id = UNIPHIER_SLD8_ID,
		.nr_phy = 2,
		.phy = {
			{ .base = 0x5bc01000, .nr_dx = 2, },
			{ .base = 0x5be01000, .nr_dx = 2, },
		},
	},
	{
		.soc_id = UNIPHIER_LD11_ID,
		.nr_phy = 1,
		.phy = {
			{ .base = 0x5bc01000, .nr_dx = 4, },
		},
	},
};
UNIPHIER_DEFINE_SOCDATA_FUNC(uniphier_get_ddrphy_param, uniphier_ddrphy_param)

static void print_bdl(void __iomem *reg, int n)
{
	u32 val = readl(reg);
	int i;

	for (i = 0; i < n; i++)
		printf(FS PRINTF_FORMAT, (val >> i * 6) & 0x3f);
}

static void dump_loop(const struct uniphier_ddrphy_param *param,
		      void (*callback)(void __iomem *))
{
	void __iomem *phy_base, *dx_base;
	int phy, dx;

	for (phy = 0; phy < param->nr_phy; phy++) {
		phy_base = ioremap(param->phy[phy].base, SZ_4K);
		dx_base = phy_base + PHY_DX_BASE;

		for (dx = 0; dx < param->phy[phy].nr_dx; dx++) {
			printf("PHY%dDX%d:", phy, dx);
			(*callback)(dx_base);
			dx_base += PHY_DX_STRIDE;
			printf("\n");
		}

		iounmap(phy_base);
	}
}

static void __wbdl_dump(void __iomem *dx_base)
{
	print_bdl(dx_base + PHY_DX_BDLR0, 5);
	print_bdl(dx_base + PHY_DX_BDLR1, 5);

	printf(FS "(+" PRINTF_FORMAT ")",
	       readl(dx_base + PHY_DX_LCDLR1) & 0xff);
}

static void wbdl_dump(const struct uniphier_ddrphy_param *param)
{
	printf("\n--- Write Bit Delay Line ---\n");
	printf("           DQ0  DQ1  DQ2  DQ3  DQ4  DQ5  DQ6  DQ7   DM  DQS  (WDQD)\n");

	dump_loop(param, &__wbdl_dump);
}

static void __rbdl_dump(void __iomem *dx_base)
{
	print_bdl(dx_base + PHY_DX_BDLR3, 5);
	print_bdl(dx_base + PHY_DX_BDLR4, 4);

	printf(FS "(+" PRINTF_FORMAT ")",
	       (readl(dx_base + PHY_DX_LCDLR1) >> 8) & 0xff);
}

static void rbdl_dump(const struct uniphier_ddrphy_param *param)
{
	printf("\n--- Read Bit Delay Line ---\n");
	printf("           DQ0  DQ1  DQ2  DQ3  DQ4  DQ5  DQ6  DQ7   DM  (RDQSD)\n");

	dump_loop(param, &__rbdl_dump);
}

static void __wld_dump(void __iomem *dx_base)
{
	int rank;
	u32 lcdlr0 = readl(dx_base + PHY_DX_LCDLR0);
	u32 gtr = readl(dx_base + PHY_DX_GTR);

	for (rank = 0; rank < 4; rank++) {
		u32 wld = (lcdlr0 >> (8 * rank)) & 0xff; /* Delay */
		u32 wlsl = (gtr >> (12 + 2 * rank)) & 0x3; /* System Latency */

		printf(FS PRINTF_FORMAT "%sT", wld,
		       wlsl == 0 ? "-1" : wlsl == 1 ? "+0" : "+1");
	}
}

static void wld_dump(const struct uniphier_ddrphy_param *param)
{
	printf("\n--- Write Leveling Delay ---\n");
	printf("           Rank0   Rank1   Rank2   Rank3\n");

	dump_loop(param, &__wld_dump);
}

static void __dqsgd_dump(void __iomem *dx_base)
{
	int rank;
	u32 lcdlr2 = readl(dx_base + PHY_DX_LCDLR2);
	u32 gtr = readl(dx_base + PHY_DX_GTR);

	for (rank = 0; rank < 4; rank++) {
		u32 dqsgd = (lcdlr2 >> (8 * rank)) & 0xff; /* Delay */
		u32 dgsl = (gtr >> (3 * rank)) & 0x7; /* System Latency */

		printf(FS PRINTF_FORMAT "+%dT", dqsgd, dgsl);
	}
}

static void dqsgd_dump(const struct uniphier_ddrphy_param *param)
{
	printf("\n--- DQS Gating Delay ---\n");
	printf("           Rank0   Rank1   Rank2   Rank3\n");

	dump_loop(param, &__dqsgd_dump);
}

static void __mdl_dump(void __iomem *dx_base)
{
	int i;
	u32 mdl = readl(dx_base + PHY_DX_MDLR);

	for (i = 0; i < 3; i++)
		printf(FS PRINTF_FORMAT, (mdl >> (8 * i)) & 0xff);
}

static void mdl_dump(const struct uniphier_ddrphy_param *param)
{
	printf("\n--- Master Delay Line ---\n");
	printf("          IPRD TPRD MDLD\n");

	dump_loop(param, &__mdl_dump);
}

#define REG_DUMP(x)							\
	{ int ofst = PHY_ ## x; void __iomem *reg = phy_base + ofst;	\
		printf("%3d: %-10s: %08x : %08x\n",			\
		       ofst >> PHY_REG_SHIFT, #x,			\
		       ptr_to_uint(reg), readl(reg)); }

#define DX_REG_DUMP(dx, x)						\
	{ int ofst = PHY_DX_BASE + PHY_DX_STRIDE * (dx) +		\
			PHY_DX_## x;					\
		void __iomem *reg = phy_base + ofst;			\
		printf("%3d: DX%d%-7s: %08x : %08x\n",			\
		       ofst >> PHY_REG_SHIFT, (dx), #x,			\
		       ptr_to_uint(reg), readl(reg)); }

static void reg_dump(const struct uniphier_ddrphy_param *param)
{
	void __iomem *phy_base;
	int phy, dx;

	printf("\n--- DDR PHY registers ---\n");

	for (phy = 0; phy < param->nr_phy; phy++) {
		phy_base = ioremap(param->phy[phy].base, SZ_4K);

		printf("== PHY%d (base: %08x) ==\n",
		       phy, ptr_to_uint(phy_base));
		printf(" No: Name      : Address  : Data\n");

		REG_DUMP(RIDR);
		REG_DUMP(PIR);
		REG_DUMP(PGCR0);
		REG_DUMP(PGCR1);
		REG_DUMP(PGSR0);
		REG_DUMP(PGSR1);
		REG_DUMP(PLLCR);
		REG_DUMP(PTR0);
		REG_DUMP(PTR1);
		REG_DUMP(PTR2);
		REG_DUMP(PTR3);
		REG_DUMP(PTR4);
		REG_DUMP(ACMDLR);
		REG_DUMP(ACBDLR);
		REG_DUMP(DXCCR);
		REG_DUMP(DSGCR);
		REG_DUMP(DCR);
		REG_DUMP(DTPR0);
		REG_DUMP(DTPR1);
		REG_DUMP(DTPR2);
		REG_DUMP(MR0);
		REG_DUMP(MR1);
		REG_DUMP(MR2);
		REG_DUMP(MR3);

		for (dx = 0; dx < param->phy[phy].nr_dx; dx++) {
			DX_REG_DUMP(dx, GCR);
			DX_REG_DUMP(dx, GTR);
		}

		iounmap(phy_base);
	}
}

static int do_ddr(struct cmd_tbl *cmdtp, int flag, int argc,
		  char *const argv[])
{
	const struct uniphier_ddrphy_param *param;
	char *cmd;

	param = uniphier_get_ddrphy_param();
	if (!param) {
		pr_err("unsupported SoC\n");
		return CMD_RET_FAILURE;
	}

	if (argc == 1)
		cmd = "all";
	else
		cmd = argv[1];

	if (!strcmp(cmd, "wbdl") || !strcmp(cmd, "all"))
		wbdl_dump(param);

	if (!strcmp(cmd, "rbdl") || !strcmp(cmd, "all"))
		rbdl_dump(param);

	if (!strcmp(cmd, "wld") || !strcmp(cmd, "all"))
		wld_dump(param);

	if (!strcmp(cmd, "dqsgd") || !strcmp(cmd, "all"))
		dqsgd_dump(param);

	if (!strcmp(cmd, "mdl") || !strcmp(cmd, "all"))
		mdl_dump(param);

	if (!strcmp(cmd, "reg") || !strcmp(cmd, "all"))
		reg_dump(param);

	return CMD_RET_SUCCESS;
}

U_BOOT_CMD(
	ddr,	2,	1,	do_ddr,
	"UniPhier DDR PHY parameters dumper",
	"- dump all of the following\n"
	"ddr wbdl - dump Write Bit Delay\n"
	"ddr rbdl - dump Read Bit Delay\n"
	"ddr wld - dump Write Leveling\n"
	"ddr dqsgd - dump DQS Gating Delay\n"
	"ddr mdl - dump Master Delay Line\n"
	"ddr reg - dump registers\n"
);