ar71xx: add dsa driver for the 88e6063 chip

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@18892 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 294 insertions, 0 deletions

diff --git a/target/linux/ar71xx/files/net/dsa/mv88e6063.c b/target/linux/ar71xx/files/net/dsa/mv88e6063.c
new file mode 100644
index 0000000000..5638a9fe94
--- /dev/null
+++ b/target/linux/ar71xx/files/net/dsa/mv88e6063.c
@@ -0,0 +1,294 @@
+/*
+ * net/dsa/mv88e6063.c - Driver for Marvell 88e6063 switch chips
+ * Copyright (c) 2009 Gabor Juhos <juhosg@openwrt.org>
+ *
+ * This driver was base on: net/dsa/mv88e6060.c
+ *   net/dsa/mv88e6063.c - Driver for Marvell 88e6060 switch chips
+ *   Copyright (c) 2008-2009 Marvell Semiconductor
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/list.h>
+#include <linux/netdevice.h>
+#include <linux/phy.h>
+#include "dsa_priv.h"
+
+#define REG_BASE		0x10
+#define REG_PHY(p)		(REG_BASE + (p))
+#define REG_PORT(p)		(REG_BASE + 8 + (p))
+#define REG_GLOBAL		(REG_BASE + 0x0f)
+#define NUM_PORTS		7
+
+static int reg_read(struct dsa_switch *ds, int addr, int reg)
+{
+	return mdiobus_read(ds->master_mii_bus, addr, reg);
+}
+
+#define REG_READ(addr, reg)					\
+	({							\
+		int __ret;					\
+								\
+		__ret = reg_read(ds, addr, reg);		\
+		if (__ret < 0)					\
+			return __ret;				\
+		__ret;						\
+	})
+
+
+static int reg_write(struct dsa_switch *ds, int addr, int reg, u16 val)
+{
+	return mdiobus_write(ds->master_mii_bus, addr, reg, val);
+}
+
+#define REG_WRITE(addr, reg, val)				\
+	({							\
+		int __ret;					\
+								\
+		__ret = reg_write(ds, addr, reg, val);		\
+		if (__ret < 0)					\
+			return __ret;				\
+	})
+
+static char *mv88e6063_probe(struct mii_bus *bus, int sw_addr)
+{
+	int ret;
+
+	ret = mdiobus_read(bus, REG_PORT(0), 0x03);
+	if (ret >= 0) {
+		ret &= 0xfff0;
+		if (ret == 0x1530)
+			return "Marvell 88E6063";
+	}
+
+	return NULL;
+}
+
+static int mv88e6063_switch_reset(struct dsa_switch *ds)
+{
+	int i;
+	int ret;
+
+	/*
+	 * Set all ports to the disabled state.
+	 */
+	for (i = 0; i < NUM_PORTS; i++) {
+		ret = REG_READ(REG_PORT(i), 0x04);
+		REG_WRITE(REG_PORT(i), 0x04, ret & 0xfffc);
+	}
+
+	/*
+	 * Wait for transmit queues to drain.
+	 */
+	msleep(2);
+
+	/*
+	 * Reset the switch.
+	 */
+	REG_WRITE(REG_GLOBAL, 0x0a, 0xa130);
+
+	/*
+	 * Wait up to one second for reset to complete.
+	 */
+	for (i = 0; i < 1000; i++) {
+		ret = REG_READ(REG_GLOBAL, 0x00);
+		if ((ret & 0x8000) == 0x0000)
+			break;
+
+		msleep(1);
+	}
+	if (i == 1000)
+		return -ETIMEDOUT;
+
+	return 0;
+}
+
+static int mv88e6063_setup_global(struct dsa_switch *ds)
+{
+	/*
+	 * Disable discarding of frames with excessive collisions,
+	 * set the maximum frame size to 1536 bytes, and mask all
+	 * interrupt sources.
+	 */
+	REG_WRITE(REG_GLOBAL, 0x04, 0x0800);
+
+	/*
+	 * Enable automatic address learning, set the address
+	 * database size to 1024 entries, and set the default aging
+	 * time to 5 minutes.
+	 */
+	REG_WRITE(REG_GLOBAL, 0x0a, 0x2130);
+
+	return 0;
+}
+
+static int mv88e6063_setup_port(struct dsa_switch *ds, int p)
+{
+	int addr = REG_PORT(p);
+
+	/*
+	 * Do not force flow control, disable Ingress and Egress
+	 * Header tagging, disable VLAN tunneling, and set the port
+	 * state to Forwarding.  Additionally, if this is the CPU
+	 * port, enable Ingress and Egress Trailer tagging mode.
+	 */
+	REG_WRITE(addr, 0x04, dsa_is_cpu_port(ds, p) ?  0x4103 : 0x0003);
+
+	/*
+	 * Port based VLAN map: give each port its own address
+	 * database, allow the CPU port to talk to each of the 'real'
+	 * ports, and allow each of the 'real' ports to only talk to
+	 * the CPU port.
+	 */
+	REG_WRITE(addr, 0x06,
+			((p & 0xf) << 12) |
+			 (dsa_is_cpu_port(ds, p) ?
+				ds->phys_port_mask :
+				(1 << ds->dst->cpu_port)));
+
+	/*
+	 * Port Association Vector: when learning source addresses
+	 * of packets, add the address to the address database using
+	 * a port bitmap that has only the bit for this port set and
+	 * the other bits clear.
+	 */
+	REG_WRITE(addr, 0x0b, 1 << p);
+
+	return 0;
+}
+
+static int mv88e6063_setup(struct dsa_switch *ds)
+{
+	int i;
+	int ret;
+
+	ret = mv88e6063_switch_reset(ds);
+	if (ret < 0)
+		return ret;
+
+	/* @@@ initialise atu */
+
+	ret = mv88e6063_setup_global(ds);
+	if (ret < 0)
+		return ret;
+
+	for (i = 0; i < NUM_PORTS; i++) {
+		ret = mv88e6063_setup_port(ds, i);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int mv88e6063_set_addr(struct dsa_switch *ds, u8 *addr)
+{
+	REG_WRITE(REG_GLOBAL, 0x01, (addr[0] << 8) | addr[1]);
+	REG_WRITE(REG_GLOBAL, 0x02, (addr[2] << 8) | addr[3]);
+	REG_WRITE(REG_GLOBAL, 0x03, (addr[4] << 8) | addr[5]);
+
+	return 0;
+}
+
+static int mv88e6063_port_to_phy_addr(int port)
+{
+	if (port >= 0 && port <= NUM_PORTS)
+		return REG_PHY(port);
+	return -1;
+}
+
+static int mv88e6063_phy_read(struct dsa_switch *ds, int port, int regnum)
+{
+	int addr;
+
+	addr = mv88e6063_port_to_phy_addr(port);
+	if (addr == -1)
+		return 0xffff;
+
+	return reg_read(ds, addr, regnum);
+}
+
+static int
+mv88e6063_phy_write(struct dsa_switch *ds, int port, int regnum, u16 val)
+{
+	int addr;
+
+	addr = mv88e6063_port_to_phy_addr(port);
+	if (addr == -1)
+		return 0xffff;
+
+	return reg_write(ds, addr, regnum, val);
+}
+
+static void mv88e6063_poll_link(struct dsa_switch *ds)
+{
+	int i;
+
+	for (i = 0; i < DSA_MAX_PORTS; i++) {
+		struct net_device *dev;
+		int uninitialized_var(port_status);
+		int link;
+		int speed;
+		int duplex;
+		int fc;
+
+		dev = ds->ports[i];
+		if (dev == NULL)
+			continue;
+
+		link = 0;
+		if (dev->flags & IFF_UP) {
+			port_status = reg_read(ds, REG_PORT(i), 0x00);
+			if (port_status < 0)
+				continue;
+
+			link = !!(port_status & 0x1000);
+		}
+
+		if (!link) {
+			if (netif_carrier_ok(dev)) {
+				printk(KERN_INFO "%s: link down\n", dev->name);
+				netif_carrier_off(dev);
+			}
+			continue;
+		}
+
+		speed = (port_status & 0x0100) ? 100 : 10;
+		duplex = (port_status & 0x0200) ? 1 : 0;
+		fc = ((port_status & 0xc000) == 0xc000) ? 1 : 0;
+
+		if (!netif_carrier_ok(dev)) {
+			printk(KERN_INFO "%s: link up, %d Mb/s, %s duplex, "
+					 "flow control %sabled\n", dev->name,
+					 speed, duplex ? "full" : "half",
+					 fc ? "en" : "dis");
+			netif_carrier_on(dev);
+		}
+	}
+}
+
+static struct dsa_switch_driver mv88e6063_switch_driver = {
+	.tag_protocol	= htons(ETH_P_TRAILER),
+	.probe		= mv88e6063_probe,
+	.setup		= mv88e6063_setup,
+	.set_addr	= mv88e6063_set_addr,
+	.phy_read	= mv88e6063_phy_read,
+	.phy_write	= mv88e6063_phy_write,
+	.poll_link	= mv88e6063_poll_link,
+};
+
+static int __init mv88e6063_init(void)
+{
+	register_switch_driver(&mv88e6063_switch_driver);
+	return 0;
+}
+module_init(mv88e6063_init);
+
+static void __exit mv88e6063_cleanup(void)
+{
+	unregister_switch_driver(&mv88e6063_switch_driver);
+}
+module_exit(mv88e6063_cleanup);