1 files changed, 287 insertions, 0 deletions

diff --git a/net/dsa/mv88e6060.c b/net/dsa/mv88e6060.c
new file mode 100644
index 000000000000..54068ef251e8
--- /dev/null
+++ b/net/dsa/mv88e6060.c
@@ -0,0 +1,287 @@
+/*
+ * net/dsa/mv88e6060.c - Driver for Marvell 88e6060 switch chips
+ * Copyright (c) 2008 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_PORT(p)             (8 + (p))
+#define REG_GLOBAL              0x0f
+
+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 *mv88e6060_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 == 0x0600)
+                        return "Marvell 88E6060";
+        }
+
+        return NULL;
+}
+
+static int mv88e6060_switch_reset(struct dsa_switch *ds)
+{
+        int i;
+        int ret;
+
+        /*
+         * Set all ports to the disabled state.
+         */
+        for (i = 0; i < 6; 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 mv88e6060_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 mv88e6060_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, (p == ds->cpu_port) ? 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) |
+                         ((p == ds->cpu_port) ?
+                                ds->valid_port_mask :
+                                (1 << ds->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 mv88e6060_setup(struct dsa_switch *ds)
+{
+        int i;
+        int ret;
+
+        ret = mv88e6060_switch_reset(ds);
+        if (ret < 0)
+                return ret;
+
+        /* @@@ initialise atu */
+
+        ret = mv88e6060_setup_global(ds);
+        if (ret < 0)
+                return ret;
+
+        for (i = 0; i < 6; i++) {
+                ret = mv88e6060_setup_port(ds, i);
+                if (ret < 0)
+                        return ret;
+        }
+
+        return 0;
+}
+
+static int mv88e6060_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 mv88e6060_port_to_phy_addr(int port)
+{
+        if (port >= 0 && port <= 5)
+                return port;
+        return -1;
+}
+
+static int mv88e6060_phy_read(struct dsa_switch *ds, int port, int regnum)
+{
+        int addr;
+
+        addr = mv88e6060_port_to_phy_addr(port);
+        if (addr == -1)
+                return 0xffff;
+
+        return reg_read(ds, addr, regnum);
+}
+
+static int
+mv88e6060_phy_write(struct dsa_switch *ds, int port, int regnum, u16 val)
+{
+        int addr;
+
+        addr = mv88e6060_port_to_phy_addr(port);
+        if (addr == -1)
+                return 0xffff;
+
+        return reg_write(ds, addr, regnum, val);
+}
+
+static void mv88e6060_poll_link(struct dsa_switch *ds)
+{
+        int i;
+
+        for (i = 0; i < DSA_MAX_PORTS; i++) {
+                struct net_device *dev;
+                int 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 mv88e6060_switch_driver = {
+        .tag_protocol   = htons(ETH_P_TRAILER),
+        .probe          = mv88e6060_probe,
+        .setup          = mv88e6060_setup,
+        .set_addr       = mv88e6060_set_addr,
+        .phy_read       = mv88e6060_phy_read,
+        .phy_write      = mv88e6060_phy_write,
+        .poll_link      = mv88e6060_poll_link,
+};
+
+int __init mv88e6060_init(void)
+{
+        register_switch_driver(&mv88e6060_switch_driver);
+        return 0;
+}
+module_init(mv88e6060_init);
+
+void __exit mv88e6060_cleanup(void)
+{
+        unregister_switch_driver(&mv88e6060_switch_driver);
+}
+module_exit(mv88e6060_cleanup);