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/*
* net/dsa/mv88e6131.c - Marvell 88e6095/6095f/6131 switch chip support
* 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 <net/dsa.h>
#include "mv88e6xxx.h"
/*
* Switch product IDs
*/
#define ID_6085 0x04a0
#define ID_6095 0x0950
#define ID_6131 0x1060
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 == ID_6085)
return "Marvell 88E6085";
if (ret == ID_6095)
return "Marvell 88E6095/88E6095F";
if (ret == ID_6131)
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 < 11; 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 upstream port as
* the port to which ingress and egress monitor frames are to
* be sent.
*/
REG_WRITE(REG_GLOBAL, 0x1a, (dsa_upstream_port(ds) * 0x1100) | 0x00f0);
/*
* Disable cascade port functionality unless this device
* is used in a cascade configuration, and set the switch's
* DSA device number.
*/
if (ds->dst->pd->nr_chips > 1)
REG_WRITE(REG_GLOBAL, 0x1c, 0xf000 | (ds->index & 0x1f));
else
REG_WRITE(REG_GLOBAL, 0x1c, 0xe000 | (ds->index & 0x1f));
/*
* 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 highest priority.
*/
REG_WRITE(REG_GLOBAL2, 0x05, 0x00ff);
/*
* Program the DSA routing table.
*/
for (i = 0; i < 32; i++) {
int nexthop;
nexthop = 0x1f;
if (i != ds->index && i < ds->dst->pd->nr_chips)
nexthop = ds->pd->rtable[i] & 0x1f;
REG_WRITE(REG_GLOBAL2, 0x06, 0x8000 | (i << 8) | nexthop);
}
/*
* Clear all trunk masks.
*/
for (i = 0; i < 8; i++)
REG_WRITE(REG_GLOBAL2, 0x07, 0x8000 | (i << 12) | 0x7ff);
/*
* 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)
{
struct mv88e6xxx_priv_state *ps = (void *)(ds + 1);
int addr = REG_PORT(p);
u16 val;
/*
* MAC Forcing register: don't force link, speed, duplex
* or flow control state to any particular values on physical
* ports, but force the CPU port and all DSA ports to 1000 Mb/s
* (100 Mb/s on 6085) full duplex.
*/
if (dsa_is_cpu_port(ds, p) || ds->dsa_port_mask & (1 << p))
if (ps->id == ID_6085)
REG_WRITE(addr, 0x01, 0x003d); /* 100 Mb/s */
else
REG_WRITE(addr, 0x01, 0x003e); /* 1000 Mb/s */
else
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.
*
* If this is the upstream port for this switch, enable
* forwarding of unknown unicasts, and enable DSA tagging
* mode.
*
* If this is the link to another switch, use DSA tagging
* mode, but do not enable forwarding of unknown unicasts.
*/
val = 0x0433;
if (p == dsa_upstream_port(ds)) {
val |= 0x0104;
/*
* On 6085, unknown multicast forward is controlled
* here rather than in Port Control 2 register.
*/
if (ps->id == ID_6085)
val |= 0x0008;
}
if (ds->dsa_port_mask & (1 << p))
val |= 0x0100;
REG_WRITE(addr, 0x04, val);
/*
* 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, dsa_is_cpu_port(ds, p) ? 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 upstream port.
*/
val = (p & 0xf) << 12;
if (dsa_is_cpu_port(ds, p))
val |= ds->phys_port_mask;
else
val |= 1 << dsa_upstream_port(ds);
REG_WRITE(addr, 0x06, val);
/*
* 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 upstream port number.
*
* If this is the upstream port for this switch, enable
* forwarding of unknown multicast addresses.
*/
if (ps->id == ID_6085)
/*
* on 6085, bits 3:0 are reserved, bit 6 control ARP
* mirroring, and multicast forward is handled in
* Port Control register.
*/
REG_WRITE(addr, 0x08, 0x0080);
else {
val = 0x0080 | dsa_upstream_port(ds);
if (p == dsa_upstream_port(ds))
val |= 0x0040;
REG_WRITE(addr, 0x08, val);
}
/*
* 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);
ps->id = REG_READ(REG_PORT(0), 0x03) & 0xfff0;
ret = mv88e6131_switch_reset(ds);
if (ret < 0)
return
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