/*
* net/dsa/mv88e6131.c - Marvell 88e6131 switch chip support
* 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"
#include "mv88e6xxx.h"
static char *mv88e6131_probe(struct mii_bus *bus, int sw_addr)
{
int ret;
ret = __mv88e6xxx_reg_read(bus, sw_addr, REG_PORT(0), 0x03);
if (ret >= 0) {
ret &= 0xfff0;
if (ret == 0x1060)
return "Marvell 88E6131";
}
return NULL;
}
static int mv88e6131_switch_reset(struct dsa_switch *ds)
{
int i;
int ret;
/*
* Set all ports to the disabled state.
*/
for (i = 0; i < 8; 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, 0x04, 0xc400);
/*
* Wait up to one second for reset to complete.
*/
for (i = 0; i < 1000; i++) {
ret = REG_READ(REG_GLOBAL, 0x00);
if ((ret & 0xc800) == 0xc800)
break;
msleep(1);
}
if (i == 1000)
return -ETIMEDOUT;
return 0;
}
static int mv88e6131_setup_global(struct dsa_switch *ds)
{
int ret;
int i;
/*
* Enable the PHY polling unit, don't discard packets with
* excessive collisions, use a weighted fair queueing scheme
* to arbitrate between packet queues, set the maximum frame
* size to 1632, and mask all interrupt sources.
*/
REG_WRITE(REG_GLOBAL, 0x04, 0x4400);
/*
* Set the default address aging time to 5 minutes, and
* enable address learn messages to be sent to all message
* ports.
*/
REG_WRITE(REG_GLOBAL, 0x0a, 0x0148);
/*
* Configure the priority mapping registers.
*/
ret = mv88e6xxx_config_prio(ds);
if (ret < 0)
return ret;
/*
* Set the VLAN ethertype to 0x8100.
*/
REG_WRITE(REG_GLOBAL, 0x19, 0x8100);
/*
* Disable ARP mirroring, and configure the cpu port as the
* port to which ingress and egress monitor frames are to be
* sent.
*/
REG_WRITE(REG_GLOBAL, 0x1a, (ds->cpu_port * 0x1100) | 0x00f0);
/*
* Disable cascade port functionality, and set the switch's
* DSA device number to zero.
*/
REG_WRITE(REG_GLOBAL, 0x1c, 0xe000);
/*
* Send all frames with destination addresses matching
* 01:80:c2:00:00:0x to the CPU port.
*/
REG_WRITE(REG_GLOBAL2, 0x03, 0xffff);
/*
* Ignore removed tag data on doubly tagged packets, disable
* flow control messages, force flow control priority to the
* highest, and send all special multicast frames to the CPU
* port at the higest priority.
*/
REG_WRITE(REG_GLOBAL2, 0x05, 0x00ff);
/*
* Map all DSA device IDs to the CPU port.
*/
for (i = 0; i < 32; i++)
REG_WRITE(REG_GLOBAL2, 0x06, 0x8000 | (i << 8) | ds->cpu_port);
/*
* Clear all trunk masks.
*/
for (i = 0; i < 8; i++)
REG_WRITE(REG_GLOBAL2, 0x07, 0x8000 | (i << 12) | 0xff);
/*
* Clear all trunk mappings.
*/
for (i = 0; i < 16; i++)
REG_WRITE(REG_GLOBAL2, 0x08, 0x8000 | (i << 11));
/*
* Force the priority of IGMP/MLD snoop frames and ARP frames
* to the highest setting.
*/
REG_WRITE(REG_GLOBAL2, 0x0f, 0x00ff);
return 0;
}
static int mv88e6131_setup_port(struct dsa_switch *ds, int p)
{
int addr = REG_PORT(p);
/*
* MAC Forcing register: don't force link, speed, duplex
* or flow control state to any particular values.
*/
REG_WRITE(addr, 0x01, 0x0003);
/*
* Port Control: disable Core Tag, disable Drop-on-Lock,
* transmit frames unmodified, disable Header mode,
* enable IGMP/MLD snoop, disable DoubleTag, disable VLAN
* tunneling, determine priority by looking at 802.1p and
* IP priority fields (IP prio has precedence), and set STP
* state to Forwarding. Finally, if this is the CPU port,
* additionally enable DSA tagging and forwarding of unknown
* unicast addresses.
*/
REG_WRITE(addr, 0x04, (p == ds->cpu_port) ? 0x0537 : 0x0433);
/*
* Port Control 1: disable trunking. Also, if this is the
* CPU port, enable learn messages to be sent to this port.
*/
REG_WRITE(addr, 0x05, (p == ds->cpu_port) ? 0x8000 : 0x0000);
/*
* 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)));
/*
* Default VLAN ID and priority: don't set a default VLAN
* ID, and set the default packet priority to zero.
*/
REG_WRITE(addr, 0x07, 0x0000);
/*
* Port Control 2: don't force a good FCS, don't use
* VLAN-based, source address-based or destination
* address-based priority overrides, don't let the switch
* add or strip 802.1q tags, don't discard tagged or
* untagged frames on this port, do a destination address
* lookup on received packets as usual, don't send a copy
* of all transmitted/received frames on this port to the
* CPU, and configure the CPU port number. Also, if this
* is the CPU port, enable forwarding of unknown multicast
* addresses.
*/
REG_WRITE(addr, 0x08,
((p == ds->cpu_port) ? 0x00c0 : 0x0080) |
ds->cpu_port);
/*
* Rate Control: disable ingress rate limiting.
*/
REG_WRITE(addr, 0x09, 0x0000);
/*
* Rate Control 2: disable egress rate limiting.
*/
REG_WRITE(addr, 0x0a, 0x0000);
/*
* 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);
/*
* Tag Remap: use an identity 802.1p prio -> switch prio
* mapping.
*/
REG_WRITE(addr, 0x18, 0x3210);
/*
* Tag Remap 2: use an identity 802.1p prio -> switch prio
* mapping.
*/
REG_WRITE(addr, 0x19, 0x7654);
return 0;
}
static int mv88e6131_setup(struct dsa_switch *ds)
{
struct mv88e6xxx_priv_state *ps = (void *)(ds + 1);
int i;
int ret;
mutex_init(&ps->smi_mutex);
mv88e6xxx_ppu_state_init(ds);
mutex_init(&ps->stats_mutex);
ret = mv88e6131_switch_reset(ds);
if (ret < 0)
return ret;
/* @@@ initialise vtu and atu */
ret = mv88e6131_setup_global(ds);
if (ret < 0)
return ret;
for (i = 0; i < 6; i++) {
ret = mv88e6131_setup_port(ds, i);
if (ret < 0)
return ret;
}
return 0;
}
static int mv88e6131_port_to_phy_addr(int port)
{
if (port >= 0 && port != 3 && port <= 7)
return port;
return -1;
}
static int
mv88e6131_phy_read(struct dsa_switch *ds, int port, int regnum)
{
int addr = mv88e6131_port_to_phy_addr(port);
return mv88e6xxx_phy_read_ppu(ds, addr, regnum);
}
static int
mv88e6131_phy_write(struct dsa_switch *ds,
int port, int regnum, u16 val)
{
int addr = mv88e6131_port_to_phy_addr(port);
return mv88e6xxx_phy_write_ppu(ds, addr, regnum, val);
}
static struct mv88e6xxx_hw_stat mv88e6131_hw_stats[] = {
{ "in_good_octets", 8, 0x00, },
{ "in_bad_octets", 4, 0x02, },
{ "in_unicast", 4, 0x04, },
{ "in_broadcasts", 4, 0x06, },
{ "in_multicasts", 4, 0x07, },
{ "in_pause", 4, 0x16, },
{ "in_undersize", 4, 0x18, },
{ "in_fragments", 4, 0x19, },
{ "in_oversize", 4, 0x1a, },
{ "in_jabber", 4, 0x1b, },
{ "in_rx_error", 4, 0x1c, },
{ "in_fcs_error", 4, 0x1d, },
{ "out_octets", 8, 0x0e, },
{ "out_unicast", 4, 0x10, },
{ "out_broadcasts", 4, 0x13, },
{ "out_multicasts", 4, 0x12, },
{ "out_pause", 4, 0x15, },
{ "excessive", 4, 0x11, },
{ "collisions", 4, 0x1e, },
{ "deferred", 4, 0x05, },
{ "single", 4, 0x14, },
{ "multiple", 4, 0x17, },
{ "out_fcs_error", 4, 0x03, },
{ "late", 4, 0x1f, },
{ "hist_64bytes", 4, 0x08, },
{ "hist_65_127bytes", 4, 0x09, },
{ "hist_128_255bytes", 4, 0x0a, },
{ "hist_256_511bytes", 4, 0x0b, },
{ "hist_512_1023bytes", 4, 0x0c, },
{ "hist_1024_max_bytes", 4, 0x0d, },
};
static void
mv88e6131_get_strings(struct dsa_switch *ds, int port, uint8_t *data)
{
mv88e6xxx_get_strings(ds, ARRAY_SIZE(mv88e6131_hw_stats),
mv88e6131_hw_stats, port, data);
}
static void
mv88e6131_get_ethtool_stats(struct dsa_switch *ds,
int port, uint64_t *data)
{
mv88e6xxx_get_ethtool_stats(ds, ARRAY_SIZE(mv88e6131_hw_stats),
mv88e6131_hw_stats, port, data);
}
static int mv88e6131_get_sset_count(struct dsa_switch *ds)
{
return ARRAY_SIZE(mv88e6131_hw_stats);
}
static struct dsa_switch_driver mv88e6131_switch_driver = {
.tag_protocol = __constant_htons(ETH_P_DSA),
.priv_size = sizeof(struct mv88e6xxx_priv_state),
.probe = mv88e6131_probe,
.setup = mv88e6131_setup,
.set_addr = mv88e6xxx_set_addr_direct,
.phy_read = mv88e6131_phy_read,
.phy_write = mv88e6131_phy_write,
.poll_link = mv88e6xxx_poll_link,
.get_strings = mv88e6131_get_strings,
.get_ethtool_stats = mv88e6131_get_ethtool_stats,
.get_sset_count = mv88e6131_get_sset_count,
};
int __init mv88e6131_init(void)
{
register_switch_driver(&mv88e6131_switch_driver);
return 0;
}
module_init(mv88e6131_init);
void __exit mv88e6131_cleanup(void)
{
unregister_switch_driver(&mv88e6131_switch_driver);
}
module_exit(mv88e6131_cleanup);
