OpenWrt – Rev 4
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From 1a1d61a2faf0390033a3766559ce0e758e15894e Mon Sep 17 00:00:00 2001
From: Luka Perkov <openwrt@lukaperkov.net>
Date: Wed, 29 Aug 2012 22:08:16 +0200
Subject: net: switchlib: add driver for Atheros AR8216
Signed-off-by: Luka Perkov <openwrt@lukaperkov.net>
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
--- a/drivers/net/switch/Makefile
+++ b/drivers/net/switch/Makefile
@@ -12,6 +12,7 @@ LIB := $(obj)libswitch.o
COBJS-$(CONFIG_SWITCH_MULTI) += switch.o
COBJS-$(CONFIG_SWITCH_PSB697X) += psb697x.o
COBJS-$(CONFIG_SWITCH_ADM6996I) += adm6996i.o
+COBJS-$(CONFIG_SWITCH_AR8216) += ar8216.o
COBJS := $(COBJS-y)
SRCS := $(COBJS:.o=.c)
--- /dev/null
+++ b/drivers/net/switch/ar8216.c
@@ -0,0 +1,114 @@
+/*
+ * Copyright (C) 2012 Luka Perkov <luka@openwrt.org>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <miiphy.h>
+#include <switch.h>
+#include <netdev.h>
+
+#define BITS(_s, _n) (((1UL << (_n)) - 1) << _s)
+
+#define AR8216_REG_CTRL 0x0000
+#define AR8216_CTRL_REVISION BITS(0, 8)
+#define AR8216_CTRL_VERSION BITS(8, 8)
+
+#define AR8216_PROBE_RETRIES 10
+
+static void split_addr(u32 regaddr, u16 *r1, u16 *r2, u16 *page)
+{
+ regaddr >>= 1;
+ *r1 = regaddr & 0x1e;
+
+ regaddr >>= 5;
+ *r2 = regaddr & 0x7;
+
+ regaddr >>= 3;
+ *page = regaddr & 0x1ff;
+}
+
+static int ar8216_mii_read(struct mii_dev *bus, u32 reg)
+{
+ u16 r1, r2, page;
+ u16 lo, hi;
+
+ split_addr(reg, &r1, &r2, &page);
+
+ bus->write(bus, 0x18, MDIO_DEVAD_NONE, 0, page);
+ __udelay(1000);
+
+ lo = bus->read(bus, 0x10 | r2, MDIO_DEVAD_NONE, r1);
+ hi = bus->read(bus, 0x10 | r2, MDIO_DEVAD_NONE, r1 + 1);
+
+ return (hi << 16) | lo;
+}
+
+static void ar8216_mii_write(struct mii_dev *bus, u16 reg, u32 val)
+{
+ u16 r1, r2, r3;
+ u16 lo, hi;
+
+ split_addr((u32) reg, &r1, &r2, &r3);
+
+ bus->write(bus, 0x18, MDIO_DEVAD_NONE, 0, r3);
+ __udelay(1000);
+
+ lo = val & 0xffff;
+ hi = (u16) (val >> 16);
+ bus->write(bus, 0x10 | r2, MDIO_DEVAD_NONE, r1 + 1, hi);
+ bus->write(bus, 0x10 | r2, MDIO_DEVAD_NONE, r1, lo);
+}
+
+static int ar8216_probe(struct switch_device *dev)
+{
+ struct mii_dev *bus = dev->bus;
+ u32 val;
+ u16 id;
+
+ val = ar8216_mii_read(bus, AR8216_REG_CTRL);
+ if (val == ~0)
+ return 1;
+
+ id = val & (AR8216_CTRL_REVISION | AR8216_CTRL_VERSION);
+
+ switch (id) {
+ case 0x0101:
+ return 0;
+ default:
+ return 1;
+ }
+}
+
+static void ar8216_setup(struct switch_device *dev)
+{
+ struct mii_dev *bus = dev->bus;
+
+ ar8216_mii_write(bus, 0x200, 0x200);
+ ar8216_mii_write(bus, 0x300, 0x200);
+ ar8216_mii_write(bus, 0x400, 0x200);
+ ar8216_mii_write(bus, 0x500, 0x200);
+ ar8216_mii_write(bus, 0x600, 0x7d);
+ ar8216_mii_write(bus, 0x38, 0xc000050e);
+ ar8216_mii_write(bus, 0x104, 0x4004);
+ ar8216_mii_write(bus, 0x60, 0xffffffff);
+ ar8216_mii_write(bus, 0x64, 0xaaaaaaaa);
+ ar8216_mii_write(bus, 0x68, 0x55555555);
+ ar8216_mii_write(bus, 0x6c, 0x0);
+ ar8216_mii_write(bus, 0x70, 0x41af);
+}
+
+static struct switch_driver ar8216_drv = {
+ .name = "ar8216",
+};
+
+void switch_ar8216_init(void)
+{
+ /* for archs with manual relocation */
+ ar8216_drv.probe = ar8216_probe;
+ ar8216_drv.setup = ar8216_setup;
+
+ switch_driver_register(&ar8216_drv);
+}
--- a/drivers/net/switch/switch.c
+++ b/drivers/net/switch/switch.c
@@ -23,6 +23,9 @@ void switch_init(void)
#if defined(CONFIG_SWITCH_ADM6996I)
switch_adm6996i_init();
#endif
+#if defined(CONFIG_SWITCH_AR8216)
+ switch_ar8216_init();
+#endif
board_switch_init();
}
--- a/include/switch.h
+++ b/include/switch.h
@@ -99,6 +99,7 @@ static inline void switch_setup(struct s
/* Init functions for supported Switch drivers */
extern void switch_psb697x_init(void);
extern void switch_adm6996i_init(void);
+extern void switch_ar8216_init(void);
#endif /* __SWITCH_H */