arm: kirkwood: Dockstar : Add DM Ethernet

The Dockstar board has the network chip Marvell 88E1116R. Convert to
Ethernet driver model, and use uclass mvgbe and the compatible driver
M88E1118R to bring up Ethernet.

- Add CONFIG_DM_ETH and associated configs.
- Add board_eth_init() to use uclass mvgbe to bring up the network.
And remove ad-hoc code.
- Add CONFIG_PHY_MARVELL to properly configure the network.
- Currently, CONFIG_RESET_PHY_R symbol is used in
arch/arm/mach-kirkwood/include/mach/config.h for all Kirkwood
boards with mv8831116 PHY, with each board defines the function
reset_phy(). Undefine it for this board.
- Miscellaneous changes: Move constants to .c file and remove
header file board/Seagate/dockstar/dockstar.h, use
CONFIG_SYS_THUMB_BUILD to keep u-boot image
under 512K, add CONFIG_HUSH_PARSER, use BIT macro, and cleanup comments.

- Note: This patch is a RESEND for a previous patch:
https://patchwork.ozlabs.org/project/uboot/patch/20210812051854.1340-2-mibodhi@gmail.com/

Signed-off-by: Tony Dinh <mibodhi@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>

4 files changed, 30 insertions, 84 deletions

diff --git a/board/Seagate/dockstar/dockstar.c b/board/Seagate/dockstar/dockstar.c
index fb69193..d72e3ef 100644
--- a/board/Seagate/dockstar/dockstar.c
+++ b/board/Seagate/dockstar/dockstar.c
@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0+
 /*
+ * Copyright (C) 2022 Tony Dinh <mibodhi@gmail.com>
  * Copyright (C) 2010  Eric C. Cooper <ecc@cmu.edu>
  *
  * Based on sheevaplug.c originally written by
@@ -11,18 +12,22 @@
 #include <common.h>
 #include <bootstage.h>
 #include <init.h>
-#include <miiphy.h>
-#include <net.h>
+#include <netdev.h>
 #include <asm/arch/soc.h>
 #include <asm/arch/mpp.h>
 #include <asm/arch/cpu.h>
 #include <asm/global_data.h>
 #include <asm/io.h>
 #include <asm/mach-types.h>
-#include "dockstar.h"
+#include <linux/bitops.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
+#define DOCKSTAR_OE_LOW		(~(0))
+#define DOCKSTAR_OE_HIGH	(~(0))
+#define DOCKSTAR_OE_VAL_LOW	BIT(29)	/* USB_PWEN low */
+#define DOCKSTAR_OE_VAL_HIGH	BIT(17)	/* LED pin high */
+
 int board_early_init_f(void)
 {
 	/*
@@ -92,6 +97,11 @@ int board_early_init_f(void)
 	return 0;
 }
 
+int board_eth_init(struct bd_info *bis)
+{
+	return cpu_eth_init(bis);
+}
+
 int board_init(void)
 {
 	/*
@@ -105,53 +115,21 @@ int board_init(void)
 	return 0;
 }
 
-#ifdef CONFIG_RESET_PHY_R
-/* Configure and enable MV88E1116 PHY */
-void reset_phy(void)
-{
-	u16 reg;
-	u16 devadr;
-	char *name = "egiga0";
-
-	if (miiphy_set_current_dev(name))
-		return;
-
-	/* command to read PHY dev address */
-	if (miiphy_read(name, 0xEE, 0xEE, (u16 *) &devadr)) {
-		printf("Err..%s could not read PHY dev address\n",
-			__FUNCTION__);
-		return;
-	}
-
-	/*
-	 * Enable RGMII delay on Tx and Rx for CPU port
-	 * Ref: sec 4.7.2 of chip datasheet
-	 */
-	miiphy_write(name, devadr, MV88E1116_PGADR_REG, 2);
-	miiphy_read(name, devadr, MV88E1116_MAC_CTRL_REG, &reg);
-	reg |= (MV88E1116_RGMII_RXTM_CTRL | MV88E1116_RGMII_TXTM_CTRL);
-	miiphy_write(name, devadr, MV88E1116_MAC_CTRL_REG, reg);
-	miiphy_write(name, devadr, MV88E1116_PGADR_REG, 0);
-
-	/* reset the phy */
-	miiphy_reset(name, devadr);
-
-	printf("88E1116 Initialized on %s\n", name);
-}
-#endif /* CONFIG_RESET_PHY_R */
-
 #if CONFIG_IS_ENABLED(BOOTSTAGE)
-#define GREEN_LED	(1 << 14)
-#define ORANGE_LED	(1 << 15)
+#define GREEN_LED	BIT(14)
+#define ORANGE_LED	BIT(15)
 #define BOTH_LEDS	(GREEN_LED | ORANGE_LED)
 #define NEITHER_LED	0
 
 static void set_leds(u32 leds, u32 blinking)
 {
 	struct kwgpio_registers *r = (struct kwgpio_registers *)MVEBU_GPIO1_BASE;
-	u32 oe = readl(&r->oe) | BOTH_LEDS;
+	u32 oe;
+	u32 bl;
+
+	oe = readl(&r->oe) | BOTH_LEDS;
 	writel(oe & ~leds, &r->oe);	/* active low */
-	u32 bl = readl(&r->blink_en) & ~BOTH_LEDS;
+	bl = readl(&r->blink_en) & ~BOTH_LEDS;
 	writel(bl | blinking, &r->blink_en);
 }
 
diff --git a/board/Seagate/dockstar/dockstar.h b/board/Seagate/dockstar/dockstar.h
deleted file mode 100644
index cbb1644..0000000
--- a/board/Seagate/dockstar/dockstar.h
+++ /dev/null
@@ -1,27 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0+ */
-/*
- * Copyright (C) 2010  Eric C. Cooper <ecc@cmu.edu>
- *
- * Based on sheevaplug.h originally written by
- * Prafulla Wadaskar <prafulla@marvell.com>
- * (C) Copyright 2009
- * Marvell Semiconductor <www.marvell.com>
- */
-
-#ifndef __DOCKSTAR_H
-#define __DOCKSTAR_H
-
-#define DOCKSTAR_OE_LOW		(~(0))
-#define DOCKSTAR_OE_HIGH		(~(0))
-#define DOCKSTAR_OE_VAL_LOW		(1 << 29)	/* USB_PWEN low */
-#define DOCKSTAR_OE_VAL_HIGH		(1 << 17)	/* LED pin high */
-
-/* PHY related */
-#define MV88E1116_LED_FCTRL_REG		10
-#define MV88E1116_CPRSP_CR3_REG		21
-#define MV88E1116_MAC_CTRL_REG		21
-#define MV88E1116_PGADR_REG		22
-#define MV88E1116_RGMII_TXTM_CTRL	(1 << 4)
-#define MV88E1116_RGMII_RXTM_CTRL	(1 << 5)
-
-#endif /* __DOCKSTAR_H */
diff --git a/configs/dockstar_defconfig b/configs/dockstar_defconfig
index 6c89a9a..cbc2bf6 100644
--- a/configs/dockstar_defconfig
+++ b/configs/dockstar_defconfig
@@ -2,6 +2,7 @@ CONFIG_ARM=y
 CONFIG_SKIP_LOWLEVEL_INIT=y
 CONFIG_SYS_DCACHE_OFF=y
 CONFIG_ARCH_CPU_INIT=y
+CONFIG_SYS_THUMB_BUILD=y
 CONFIG_ARCH_KIRKWOOD=y
 CONFIG_SYS_KWD_CONFIG="board/Seagate/dockstar/kwbimage.cfg"
 CONFIG_SYS_TEXT_BASE=0x600000
@@ -18,6 +19,7 @@ CONFIG_USE_BOOTCOMMAND=y
 CONFIG_BOOTCOMMAND="setenv bootargs ${console} ${mtdparts} ${bootargs_root}; ubi part root; ubifsmount ubi:root; ubifsload 0x800000 ${kernel}; ubifsload 0x1100000 ${initrd}; bootm 0x800000 0x1100000"
 CONFIG_USE_PREBOOT=y
 # CONFIG_DISPLAY_BOARDINFO is not set
+CONFIG_HUSH_PARSER=y
 CONFIG_SYS_PROMPT="DockStar> "
 # CONFIG_CMD_FLASH is not set
 CONFIG_CMD_NAND=y
@@ -36,11 +38,14 @@ CONFIG_ISO_PARTITION=y
 CONFIG_OF_CONTROL=y
 CONFIG_ENV_OVERWRITE=y
 CONFIG_ENV_IS_IN_NAND=y
+CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_NETCONSOLE=y
 CONFIG_DM=y
 # CONFIG_MMC is not set
 CONFIG_MTD=y
 CONFIG_MTD_RAW_NAND=y
+CONFIG_PHY_MARVELL=y
+CONFIG_DM_ETH=y
 CONFIG_MVGBE=y
 CONFIG_MII=y
 CONFIG_SYS_NS16550=y
diff --git a/include/configs/dockstar.h b/include/configs/dockstar.h
index 0ad04ee..736c724 100644
--- a/include/configs/dockstar.h
+++ b/include/configs/dockstar.h
@@ -1,5 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0+ */
 /*
+ * Copyright (C) 2022  Tony Dinh <mibodhi@gmail.com>
  * Copyright (C) 2010  Eric C. Cooper <ecc@cmu.edu>
  *
  * Based on sheevaplug.h originally written by
@@ -18,21 +19,13 @@
 #include "mv-common.h"
 
 /*
- *  Environment variables configurations
- */
-/*
- * max 4k env size is enough, but in case of nand
- * it has to be rounded to sector size
- */
-
-/*
  * Default environment variables
  */
 
 #define CONFIG_EXTRA_ENV_SETTINGS \
 	"console=console=ttyS0,115200\0" \
 	"mtdids=nand0=orion_nand\0" \
-	"mtdparts="CONFIG_MTDPARTS_DEFAULT \
+	"mtdparts=" CONFIG_MTDPARTS_DEFAULT \
 	"kernel=/boot/uImage\0" \
 	"initrd=/boot/uInitrd\0" \
 	"bootargs_root=ubi.mtd=1 root=ubi0:root rootfstype=ubifs ro\0"
@@ -40,13 +33,10 @@
 /*
  * Ethernet Driver configuration
  */
-#ifdef CONFIG_CMD_NET
 #define CONFIG_MVGBE_PORTS	{1, 0}	/* enable port 0 only */
 #define CONFIG_PHY_BASE_ADR	0
-#endif /* CONFIG_CMD_NET */
-
-/*
- * File system
- */
+#ifdef CONFIG_RESET_PHY_R
+#undef CONFIG_RESET_PHY_R	/* remove legacy reset_phy() */
+#endif
 
 #endif /* _CONFIG_DOCKSTAR_H */