[PATCH v2 3/3] ARM: orion5x: Add D-Link DNS-323 based on Device Tree
From: Mauri Sandberg
Date: Thu Sep 22 2022 - 17:20:26 EST
Add D-Link DNS-323 that is based on Device Tree.
Signed-off-by: Mauri Sandberg <maukka@xxxxxxxxxxxx>
---
changes from v1
- split patches, this one modifies source code
- add DT based dns323 board file
- don't remove any existing code
---
arch/arm/mach-orion5x/Kconfig | 7 +
arch/arm/mach-orion5x/Makefile | 1 +
arch/arm/mach-orion5x/board-dns323.c | 208 +++++++++++++++++++++++++++
arch/arm/mach-orion5x/board-dt.c | 3 +
arch/arm/mach-orion5x/common.h | 6 +
5 files changed, 225 insertions(+)
create mode 100644 arch/arm/mach-orion5x/board-dns323.c
diff --git a/arch/arm/mach-orion5x/Kconfig b/arch/arm/mach-orion5x/Kconfig
index 0044b2823710..1ee0d7e06828 100644
--- a/arch/arm/mach-orion5x/Kconfig
+++ b/arch/arm/mach-orion5x/Kconfig
@@ -68,6 +68,13 @@ config MACH_DNS323
Say 'Y' here if you want your kernel to support the
D-Link DNS-323 platform.
+config MACH_DNS323_DT
+ bool "D-Link DNS-323 (Flattened Device Tree)"
+ select ARCH_ORION5X_DT
+ help
+ Say 'Y' here if you want your kernel to support the
+ D-Link DNS-323 platform.
+
config MACH_TS209
bool "QNAP TS-109/TS-209"
depends on ATAGS
diff --git a/arch/arm/mach-orion5x/Makefile b/arch/arm/mach-orion5x/Makefile
index 1a585a62d5e6..2ed6bafa7acb 100644
--- a/arch/arm/mach-orion5x/Makefile
+++ b/arch/arm/mach-orion5x/Makefile
@@ -22,5 +22,6 @@ obj-$(CONFIG_MACH_RD88F6183AP_GE) += rd88f6183ap-ge-setup.o
obj-$(CONFIG_ARCH_ORION5X_DT) += board-dt.o
obj-$(CONFIG_MACH_D2NET_DT) += board-d2net.o
+obj-$(CONFIG_MACH_DNS323_DT) += board-dns323.o
obj-$(CONFIG_MACH_MSS2_DT) += board-mss2.o
obj-$(CONFIG_MACH_RD88F5182_DT) += board-rd88f5182.o
diff --git a/arch/arm/mach-orion5x/board-dns323.c b/arch/arm/mach-orion5x/board-dns323.c
new file mode 100644
index 000000000000..72a1f3e228b3
--- /dev/null
+++ b/arch/arm/mach-orion5x/board-dns323.c
@@ -0,0 +1,208 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2022 Mauri Sandberg <maukka@xxxxxxxxxxxx>
+ *
+ * Flattened Device Tree board initialization
+ *
+ * This is adapted from existing mach files and most of the source code is
+ * originally written by:
+ * Copyright (C) 2007 Herbert Valerio Riedel <hvr@xxxxxxx>
+ * Copyright (C) 2010 Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
+ * Copyright 2012 (C), Jason Cooper <jason@xxxxxxxxxxxxxx>
+ */
+
+#include <linux/of.h>
+#include <linux/phy.h>
+#include <linux/marvell_phy.h>
+#include <linux/of_net.h>
+#include <linux/clk.h>
+#include "bridge-regs.h"
+
+/* Exposed to userspace, do not change */
+enum {
+ DNS323_REV_A1, /* 0 */
+ DNS323_REV_B1, /* 1 */
+ DNS323_REV_C1, /* 2 */
+};
+
+/****************************************************************************
+ * Fix-ups
+ */
+
+static int dns323c_phy_fixup(struct phy_device *phy)
+{
+ phy->dev_flags |= MARVELL_PHY_M1118_DNS323_LEDS;
+
+ return 0;
+}
+
+/****************************************************************************
+ * Ethernet
+ */
+
+/* dns323_parse_hex_*() taken from tsx09-common.c; should a common copy of these
+ * functions be kept somewhere?
+ */
+static int __init dns323_parse_hex_nibble(char n)
+{
+ if (n >= '0' && n <= '9')
+ return n - '0';
+
+ if (n >= 'A' && n <= 'F')
+ return n - 'A' + 10;
+
+ if (n >= 'a' && n <= 'f')
+ return n - 'a' + 10;
+
+ return -1;
+}
+
+static int __init dns323_parse_hex_byte(const char *b)
+{
+ int hi;
+ int lo;
+
+ hi = dns323_parse_hex_nibble(b[0]);
+ lo = dns323_parse_hex_nibble(b[1]);
+
+ if (hi < 0 || lo < 0)
+ return -1;
+
+ return (hi << 4) | lo;
+}
+
+#define DNS323_NOR_BOOT_BASE 0xf4000000
+
+static int __init dns323_read_mac_addr(u8 *addr)
+{
+ int i;
+ char *mac_page;
+
+ /* MAC address is stored as a regular ol' string in /dev/mtdblock4
+ * (0x007d0000-0x00800000) starting at offset 196480 (0x2ff80).
+ */
+ mac_page = ioremap(DNS323_NOR_BOOT_BASE + 0x7d0000 + 196480, 1024);
+ if (!mac_page)
+ return -ENOMEM;
+
+ /* Sanity check the string we're looking at */
+ for (i = 0; i < 5; i++) {
+ if (*(mac_page + (i * 3) + 2) != ':')
+ goto error_fail;
+ }
+
+ for (i = 0; i < ETH_ALEN; i++) {
+ int byte;
+
+ byte = dns323_parse_hex_byte(mac_page + (i * 3));
+ if (byte < 0)
+ goto error_fail;
+
+ addr[i] = byte;
+ }
+
+ iounmap(mac_page);
+
+ return 0;
+
+error_fail:
+ iounmap(mac_page);
+ return -EINVAL;
+}
+
+static void __init dns323_dt_eth_fixup(void)
+{
+ struct device_node *np;
+ u8 addr[ETH_ALEN];
+ int ret;
+
+ /*
+ * The ethernet interfaces forget the MAC address assigned by u-boot
+ * if the clocks are turned off. Usually, u-boot on orion boards
+ * has no DT support to properly set local-mac-address property.
+ * As a workaround, we get the MAC address that is stored in flash
+ * and update the port device node if no valid MAC address is set.
+ */
+ ret = dns323_read_mac_addr(addr);
+
+ if (ret) {
+ pr_warn("Unable to find MAC address in flash memory\n");
+ return;
+ }
+
+ np = of_find_compatible_node(NULL, NULL, "marvell,orion-eth-port");
+
+ if (!IS_ERR(np)) {
+ struct device_node *pnp = of_get_parent(np);
+ struct clk *clk;
+ struct property *pmac;
+ u8 tmpmac[ETH_ALEN];
+ u8 *macaddr;
+ int i;
+
+ if (!pnp)
+ return;
+
+ /* skip disabled nodes or nodes with valid MAC address*/
+ if (!of_device_is_available(pnp) ||
+ !of_get_mac_address(np, tmpmac))
+ goto eth_fixup_skip;
+
+ clk = of_clk_get(pnp, 0);
+ if (IS_ERR(clk))
+ goto eth_fixup_skip;
+
+ /* ensure port clock is not gated to not hang CPU */
+ clk_prepare_enable(clk);
+
+ /* store MAC address register contents in local-mac-address */
+ pmac = kzalloc(sizeof(*pmac) + 6, GFP_KERNEL);
+ if (!pmac)
+ goto eth_fixup_no_mem;
+
+ pmac->value = pmac + 1;
+ pmac->length = ETH_ALEN;
+ pmac->name = kstrdup("local-mac-address", GFP_KERNEL);
+ if (!pmac->name) {
+ kfree(pmac);
+ goto eth_fixup_no_mem;
+ }
+
+ macaddr = pmac->value;
+ for (i = 0; i < ETH_ALEN; i++)
+ macaddr[i] = addr[i];
+
+ of_update_property(np, pmac);
+
+eth_fixup_no_mem:
+ clk_disable_unprepare(clk);
+ clk_put(clk);
+eth_fixup_skip:
+ of_node_put(pnp);
+ }
+}
+
+void __init dns323_init_dt(void)
+{
+ if (of_machine_is_compatible("dlink,dns323a1")) {
+ writel(0, MPP_DEV_CTRL); /* DEV_D[31:16] */
+ } else if (of_machine_is_compatible("dlink,dns323c1") &&
+ IS_BUILTIN(CONFIG_PHYLIB)) {
+ /* Register fixup for the PHY LEDs */
+ phy_register_fixup_for_uid(MARVELL_PHY_ID_88E1118,
+ MARVELL_PHY_ID_MASK,
+ dns323c_phy_fixup);
+
+ /* Now, -this- should theorically be done by the sata_mv driver
+ * once I figure out what's going on there. Maybe the behaviour
+ * of the LEDs should be somewhat passed via the platform_data.
+ * for now, just whack the register and make the LEDs happy
+ *
+ * Note: AFAIK, rev B1 needs the same treatement but I'll let
+ * somebody else test it.
+ */
+ writel(0x5, ORION5X_SATA_VIRT_BASE + 0x2c);
+ }
+
+ dns323_dt_eth_fixup();
+}
diff --git a/arch/arm/mach-orion5x/board-dt.c b/arch/arm/mach-orion5x/board-dt.c
index e3736ffc8347..670bff5e53f6 100644
--- a/arch/arm/mach-orion5x/board-dt.c
+++ b/arch/arm/mach-orion5x/board-dt.c
@@ -57,6 +57,9 @@ static void __init orion5x_dt_init(void)
cpu_idle_poll_ctrl(true);
}
+ if (of_machine_is_compatible("dlink,dns323"))
+ dns323_init_dt();
+
if (of_machine_is_compatible("maxtor,shared-storage-2"))
mss2_init();
diff --git a/arch/arm/mach-orion5x/common.h b/arch/arm/mach-orion5x/common.h
index eb96009e21c4..7a21f7216c65 100644
--- a/arch/arm/mach-orion5x/common.h
+++ b/arch/arm/mach-orion5x/common.h
@@ -75,6 +75,12 @@ extern void mss2_init(void);
static inline void mss2_init(void) {}
#endif
+#ifdef CONFIG_MACH_DNS323_DT
+extern void dns323_init_dt(void);
+#else
+static inline void dns323_init_dt(void) {}
+#endif
+
/*****************************************************************************
* Helpers to access Orion registers
****************************************************************************/
--
2.25.1