From cfeb11cb866e1580574295cc07b39c39a696b6e7 Mon Sep 17 00:00:00 2001
From: Ondrej Jirman <megous@megous.com>
Date: Mon, 9 Jul 2018 08:03:38 +0200
Subject: [PATCH] cmd: Add mydbg command (A83T SoC debugging helpers)

This can be used to dump various registers and do other kinds of
mischief when developing drivers.

Signed-off-by: Ondrej Jirman <megous@megous.com>
---
 cmd/Kconfig  |   7 ++++
 cmd/Makefile |   1 +
 cmd/mydbg.c  | 108 +++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 116 insertions(+)
 create mode 100644 cmd/mydbg.c

diff --git a/cmd/Kconfig b/cmd/Kconfig
index d08c35979fd..71c6ce59a17 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -1181,6 +1181,13 @@ config CMD_MTD
 	help
 	  MTD commands support.
 
+config CMD_MYDBG
+	bool "mydbg - My custom debugging command"
+	depends on MACH_SUN8I_A83T
+	help
+	  Nothing to see here, just an easy to access temporary debugging
+	  command for development.
+
 config CMD_NAND
 	bool "nand"
 	default y if NAND_SUNXI
diff --git a/cmd/Makefile b/cmd/Makefile
index 8e34720033c..1530173ce35 100644
--- a/cmd/Makefile
+++ b/cmd/Makefile
@@ -103,6 +103,7 @@ obj-$(CONFIG_CMD_CLONE) += clone.o
 ifneq ($(CONFIG_CMD_NAND)$(CONFIG_CMD_SF),)
 obj-y += legacy-mtd-utils.o
 endif
+obj-$(CONFIG_CMD_MYDBG) += mydbg.o
 obj-$(CONFIG_CMD_NAND) += nand.o
 obj-$(CONFIG_CMD_NET) += net.o
 obj-$(CONFIG_CMD_NVEDIT_EFI) += nvedit_efi.o
diff --git a/cmd/mydbg.c b/cmd/mydbg.c
new file mode 100644
index 00000000000..d19fce01a52
--- /dev/null
+++ b/cmd/mydbg.c
@@ -0,0 +1,108 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018 Ondrej Jirman <megous@megous.com>
+ */
+#include <common.h>
+#include <command.h>
+#include <cli_hush.h>
+#include <axp_pmic.h>
+#include <asm/arch/pmic_bus.h>
+#include <asm/io.h>
+
+/* This is for A83T */
+
+#define PIO_BASE 0x01C20800
+#define TCON0_BASE 0x01c0C000
+#define CCU_BASE 0x01C20000
+#define DE2_BASE 0x01000000
+#define DE2_MUX0_BASE (DE2_BASE + 0x100000)
+#define DE2_MUX1_BASE (DE2_BASE + 0x200000)
+#define PIO(n, a) readl(PIO_BASE + ((n) * 0x24 + a))
+#define PWM_BASE 0x01C21400
+#define TWI0_BASE 0x01c2ac00
+#define MMC0_BASE 0x01c0f000
+#define MMC1_BASE 0x01c10000
+#define MMC2_BASE 0x01c11000
+
+static void dump_regs(void)
+{
+	int i;
+/*
+	printf("PWM:\n");
+	for (i = 0; i < 2; i++) {
+		printf("0x%08x : %08x\n", PWM_BASE + i*4, readl(PWM_BASE + i*4));
+	}
+
+	printf("TCON0:\n");
+	for (i = 0; i <= 0x100; i++) {
+		printf("0x%08x : %08x\n", TCON0_BASE + i*4, readl(TCON0_BASE + i*4));
+	}
+
+	printf("DE2:\n");
+	for (i = 0; i <= 0x100; i++) {
+		printf("0x%08x : %08x\n", DE2_BASE + i*4, readl(DE2_BASE + i*4));
+	}
+
+	printf("DE2 MIX:\n");
+	for (i = 0; i <= 0x100; i++) {
+		printf("0x%08x : %08x\n", DE2_BASE + 0x100000 + i*4, readl(DE2_BASE + 0x100000 + i*4));
+	}
+
+	printf("TWI0:\n");
+	for (i = 0; i <= 32; i++) {
+		printf("0x%08x : %08x\n", TWI0_BASE + i*4, readl(TWI0_BASE + i*4));
+	}
+*/
+	printf("CCU:\n");
+//	for (i = 0; i <= 0x100; i++) {
+	for (i = 34; i <= 36; i++) {
+		printf("0x%08x : %08x\n", CCU_BASE + i*4, readl(CCU_BASE + i*4));
+	}
+
+	printf("MMC0:\n");
+	for (i = 0; i <= 67; i++) {
+		printf("0x%08x : %08x\n", MMC0_BASE + i*4, readl(MMC0_BASE + i*4));
+	}
+
+	printf("MMC1:\n");
+	for (i = 0; i <= 67; i++) {
+		printf("0x%08x : %08x\n", MMC1_BASE + i*4, readl(MMC1_BASE + i*4));
+	}
+
+	printf("MMC2:\n");
+	for (i = 0; i <= 67; i++) {
+		printf("0x%08x : %08x\n", MMC2_BASE + i*4, readl(MMC2_BASE + i*4));
+	}
+
+/*
+	for (i = 1; i <= 7; i++) {
+		printf("P%c_CFG0 = %08x\n", 'A' + i, PIO(i, 0x00));
+		printf("P%c_CFG1 = %08x\n", 'A' + i, PIO(i, 0x04));
+		printf("P%c_CFG2 = %08x\n", 'A' + i, PIO(i, 0x08));
+		printf("P%c_CFG3 = %08x\n", 'A' + i, PIO(i, 0x0c));
+		printf("P%c_DAT  = %08x\n", 'A' + i, PIO(i, 0x10));
+		printf("P%c_DRV0 = %08x\n", 'A' + i, PIO(i, 0x14));
+		printf("P%c_DRV1 = %08x\n", 'A' + i, PIO(i, 0x18));
+		printf("P%c_PUL0 = %08x\n", 'A' + i, PIO(i, 0x1c));
+		printf("P%c_PUL1 = %08x\n", 'A' + i, PIO(i, 0x20));
+	}
+
+	printf("PMIC:\n");
+	for (i = 0; i < 256; i++) {
+		u8 val;
+
+		int ret = pmic_bus_read(i, &val);
+		if (!ret)
+			printf("%02x = %02x\n", i, (unsigned int)val);
+	}
+*/
+}
+
+static int do_mydbg(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
+{
+	dump_regs();
+
+	return CMD_RET_SUCCESS;
+}
+
+U_BOOT_CMD(mydbg, 3, 1, do_mydbg, "mydbg", "mydbg - show some debug values");