avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/drivers/net/phy/mv88e6352.c

@@ -0,0 +1,302 @@
+/*
+ * (C) Copyright 2012
+ * Valentin Lontgchamp, Keymile AG, valentin.longchamp@keymile.com
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <miiphy.h>
+#include <asm/errno.h>
+#include <mv88e6352.h>
+
+#define SMI_HDR		((0x8 | 0x1) << 12)
+#define SMI_BUSY_MASK	(0x8000)
+#define SMIRD_OP	(0x2 << 10)
+#define SMIWR_OP	(0x1 << 10)
+#define SMI_MASK	0x1f
+#define PORT_SHIFT	5
+
+#define COMMAND_REG	0
+#define DATA_REG	1
+
+/* global registers */
+#define GLOBAL		0x1b
+
+#define GLOBAL_STATUS	0x00
+#define PPU_STATE	0x8000
+
+#define GLOBAL_CTRL	0x04
+#define SW_RESET	0x8000
+#define PPU_ENABLE	0x4000
+
+static int sw_wait_rdy(const char *devname, u8 phy_addr)
+{
+	u16 command;
+	u32 timeout = 100;
+	int ret;
+
+	/* wait till the SMI is not busy */
+	do {
+		/* read command register */
+		ret = miiphy_read(devname, phy_addr, COMMAND_REG, &command);
+		if (ret < 0) {
+			printf("%s: Error reading command register\n",
+				__func__);
+			return ret;
+		}
+		if (timeout-- == 0) {
+			printf("Err..(%s) SMI busy timeout\n", __func__);
+			return -EFAULT;
+		}
+	} while (command & SMI_BUSY_MASK);
+
+	return 0;
+}
+
+static int sw_reg_read(const char *devname, u8 phy_addr, u8 port,
+	u8 reg, u16 *data)
+{
+	int ret;
+	u16 command;
+
+	ret = sw_wait_rdy(devname, phy_addr);
+	if (ret)
+		return ret;
+
+	command = SMI_HDR | SMIRD_OP | ((port&SMI_MASK) << PORT_SHIFT) |
+			(reg & SMI_MASK);
+	debug("%s: write to command: %#x\n", __func__, command);
+	ret = miiphy_write(devname, phy_addr, COMMAND_REG, command);
+	if (ret)
+		return ret;
+
+	ret = sw_wait_rdy(devname, phy_addr);
+	if (ret)
+		return ret;
+
+	ret = miiphy_read(devname, phy_addr, DATA_REG, data);
+
+	return ret;
+}
+
+static int sw_reg_write(const char *devname, u8 phy_addr, u8 port,
+	u8 reg, u16 data)
+{
+	int ret;
+	u16 value;
+
+	ret = sw_wait_rdy(devname, phy_addr);
+	if (ret)
+		return ret;
+
+	debug("%s: write to data: %#x\n", __func__, data);
+	ret = miiphy_write(devname, phy_addr, DATA_REG, data);
+	if (ret)
+		return ret;
+
+	value = SMI_HDR | SMIWR_OP | ((port & SMI_MASK) << PORT_SHIFT) |
+			(reg & SMI_MASK);
+	debug("%s: write to command: %#x\n", __func__, value);
+	ret = miiphy_write(devname, phy_addr, COMMAND_REG, value);
+	if (ret)
+		return ret;
+
+	ret = sw_wait_rdy(devname, phy_addr);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int ppu_enable(const char *devname, u8 phy_addr)
+{
+	int i, ret = 0;
+	u16 reg;
+
+	ret = sw_reg_read(devname, phy_addr, GLOBAL, GLOBAL_CTRL, &reg);
+	if (ret) {
+		printf("%s: Error reading global ctrl reg\n", __func__);
+		return ret;
+	}
+
+	reg |= PPU_ENABLE;
+
+	ret = sw_reg_write(devname, phy_addr, GLOBAL, GLOBAL_CTRL, reg);
+	if (ret) {
+		printf("%s: Error writing global ctrl reg\n", __func__);
+		return ret;
+	}
+
+	for (i = 0; i < 1000; i++) {
+		sw_reg_read(devname, phy_addr, GLOBAL, GLOBAL_STATUS,
+			&reg);
+		if ((reg & 0xc000) == 0xc000)
+			return 0;
+		udelay(1000);
+	}
+
+	return -ETIMEDOUT;
+}
+
+static int ppu_disable(const char *devname, u8 phy_addr)
+{
+	int i, ret = 0;
+	u16 reg;
+
+	ret = sw_reg_read(devname, phy_addr, GLOBAL, GLOBAL_CTRL, &reg);
+	if (ret) {
+		printf("%s: Error reading global ctrl reg\n", __func__);
+		return ret;
+	}
+
+	reg &= ~PPU_ENABLE;
+
+	ret = sw_reg_write(devname, phy_addr, GLOBAL, GLOBAL_CTRL, reg);
+	if (ret) {
+		printf("%s: Error writing global ctrl reg\n", __func__);
+		return ret;
+	}
+
+	for (i = 0; i < 1000; i++) {
+		sw_reg_read(devname, phy_addr, GLOBAL, GLOBAL_STATUS,
+			&reg);
+		if ((reg & 0xc000) != 0xc000)
+			return 0;
+		udelay(1000);
+	}
+
+	return -ETIMEDOUT;
+}
+
+int mv88e_sw_program(const char *devname, u8 phy_addr,
+	struct mv88e_sw_reg *regs, int regs_nb)
+{
+	int i, ret = 0;
+
+	/* first we need to disable the PPU */
+	ret = ppu_disable(devname, phy_addr);
+	if (ret) {
+		printf("%s: Error disabling PPU\n", __func__);
+		return ret;
+	}
+
+	for (i = 0; i < regs_nb; i++) {
+		ret = sw_reg_write(devname, phy_addr, regs[i].port,
+			regs[i].reg, regs[i].value);
+		if (ret) {
+			printf("%s: Error configuring switch\n", __func__);
+			ppu_enable(devname, phy_addr);
+			return ret;
+		}
+	}
+
+	/* re-enable the PPU */
+	ret = ppu_enable(devname, phy_addr);
+	if (ret) {
+		printf("%s: Error enabling PPU\n", __func__);
+		return ret;
+	}
+
+	return 0;
+}
+
+int mv88e_sw_reset(const char *devname, u8 phy_addr)
+{
+	int i, ret = 0;
+	u16 reg;
+
+	ret = sw_reg_read(devname, phy_addr, GLOBAL, GLOBAL_CTRL, &reg);
+	if (ret) {
+		printf("%s: Error reading global ctrl reg\n", __func__);
+		return ret;
+	}
+
+	reg = SW_RESET | PPU_ENABLE | 0x0400;
+
+	ret = sw_reg_write(devname, phy_addr, GLOBAL, GLOBAL_CTRL, reg);
+	if (ret) {
+		printf("%s: Error writing global ctrl reg\n", __func__);
+		return ret;
+	}
+
+	for (i = 0; i < 1000; i++) {
+		sw_reg_read(devname, phy_addr, GLOBAL, GLOBAL_STATUS,
+			&reg);
+		if ((reg & 0xc800) != 0xc800)
+			return 0;
+		udelay(1000);
+	}
+
+	return -ETIMEDOUT;
+}
+
+int do_mvsw_reg_read(const char *name, int argc, char * const argv[])
+{
+	u16 value = 0, phyaddr, reg, port;
+	int ret;
+
+	phyaddr = simple_strtoul(argv[1], NULL, 10);
+	port = simple_strtoul(argv[2], NULL, 10);
+	reg = simple_strtoul(argv[3], NULL, 10);
+
+	ret = sw_reg_read(name, phyaddr, port, reg, &value);
+	printf("%#x\n", value);
+
+	return ret;
+}
+
+int do_mvsw_reg_write(const char *name, int argc, char * const argv[])
+{
+	u16 value = 0, phyaddr, reg, port;
+	int ret;
+
+	phyaddr = simple_strtoul(argv[1], NULL, 10);
+	port = simple_strtoul(argv[2], NULL, 10);
+	reg = simple_strtoul(argv[3], NULL, 10);
+	value = simple_strtoul(argv[4], NULL, 16);
+
+	ret = sw_reg_write(name, phyaddr, port, reg, value);
+
+	return ret;
+}
+
+
+int do_mvsw_reg(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+	int ret;
+	const char *cmd, *ethname;
+
+	if (argc < 2)
+		return cmd_usage(cmdtp);
+
+	cmd = argv[1];
+	--argc;
+	++argv;
+
+	if (strcmp(cmd, "read") == 0) {
+		if (argc < 5)
+			return cmd_usage(cmdtp);
+		ethname = argv[1];
+		--argc;
+		++argv;
+		ret = do_mvsw_reg_read(ethname, argc, argv);
+	} else if (strcmp(cmd, "write") == 0) {
+		if (argc < 6)
+			return cmd_usage(cmdtp);
+		ethname = argv[1];
+		--argc;
+		++argv;
+		ret = do_mvsw_reg_write(ethname, argc, argv);
+	} else
+		return cmd_usage(cmdtp);
+
+	return ret;
+}
+
+U_BOOT_CMD(
+	mvsw_reg,	7,	1,	do_mvsw_reg,
+	"marvell 88e6352 switch register access",
+	"write ethname phyaddr port reg value\n"
+	"mvsw_reg read  ethname phyaddr port reg\n"
+	);