OpenWrt – Rev 2
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/*
* Lantiq PSB6970 (Tantos) Switch driver
*
* Copyright (c) 2009,2010 Team Embedded.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License v2 as published by the
* Free Software Foundation.
*
* The switch programming done in this driver follows the
* "Ethernet Traffic Separation using VLAN" Application Note as
* published by Lantiq.
*/
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/switch.h>
#include <linux/phy.h>
#define PSB6970_MAX_VLANS 16
#define PSB6970_NUM_PORTS 7
#define PSB6970_DEFAULT_PORT_CPU 6
#define PSB6970_IS_CPU_PORT(x) ((x) > 4)
#define PHYADDR(_reg) ((_reg >> 5) & 0xff), (_reg & 0x1f)
/* --- Identification --- */
#define PSB6970_CI0 0x0100
#define PSB6970_CI0_MASK 0x000f
#define PSB6970_CI1 0x0101
#define PSB6970_CI1_VAL 0x2599
#define PSB6970_CI1_MASK 0xffff
/* --- VLAN filter table --- */
#define PSB6970_VFxL(i) ((i)*2+0x10) /* VLAN Filter Low */
#define PSB6970_VFxL_VV (1 << 15) /* VLAN_Valid */
#define PSB6970_VFxH(i) ((i)*2+0x11) /* VLAN Filter High */
#define PSB6970_VFxH_TM_SHIFT 7 /* Tagged Member */
/* --- Port registers --- */
#define PSB6970_EC(p) ((p)*0x20+2) /* Extended Control */
#define PSB6970_EC_IFNTE (1 << 1) /* Input Force No Tag Enable */
#define PSB6970_PBVM(p) ((p)*0x20+3) /* Port Base VLAN Map */
#define PSB6970_PBVM_VMCE (1 << 8)
#define PSB6970_PBVM_AOVTP (1 << 9)
#define PSB6970_PBVM_VSD (1 << 10)
#define PSB6970_PBVM_VC (1 << 11) /* VID Check with VID table */
#define PSB6970_PBVM_TBVE (1 << 13) /* Tag-Based VLAN enable */
#define PSB6970_DVID(p) ((p)*0x20+4) /* Default VLAN ID & Priority */
struct psb6970_priv {
struct switch_dev dev;
struct phy_device *phy;
u16 (*read) (struct phy_device* phydev, int reg);
void (*write) (struct phy_device* phydev, int reg, u16 val);
struct mutex reg_mutex;
/* all fields below are cleared on reset */
bool vlan;
u16 vlan_id[PSB6970_MAX_VLANS];
u8 vlan_table[PSB6970_MAX_VLANS];
u8 vlan_tagged;
u16 pvid[PSB6970_NUM_PORTS];
};
#define to_psb6970(_dev) container_of(_dev, struct psb6970_priv, dev)
static u16 psb6970_mii_read(struct phy_device *phydev, int reg)
{
struct mii_bus *bus = phydev->mdio.bus;
return bus->read(bus, PHYADDR(reg));
}
static void psb6970_mii_write(struct phy_device *phydev, int reg, u16 val)
{
struct mii_bus *bus = phydev->mdio.bus;
bus->write(bus, PHYADDR(reg), val);
}
static int
psb6970_set_vlan(struct switch_dev *dev, const struct switch_attr *attr,
struct switch_val *val)
{
struct psb6970_priv *priv = to_psb6970(dev);
priv->vlan = !!val->value.i;
return 0;
}
static int
psb6970_get_vlan(struct switch_dev *dev, const struct switch_attr *attr,
struct switch_val *val)
{
struct psb6970_priv *priv = to_psb6970(dev);
val->value.i = priv->vlan;
return 0;
}
static int psb6970_set_pvid(struct switch_dev *dev, int port, int vlan)
{
struct psb6970_priv *priv = to_psb6970(dev);
/* make sure no invalid PVIDs get set */
if (vlan >= dev->vlans)
return -EINVAL;
priv->pvid[port] = vlan;
return 0;
}
static int psb6970_get_pvid(struct switch_dev *dev, int port, int *vlan)
{
struct psb6970_priv *priv = to_psb6970(dev);
*vlan = priv->pvid[port];
return 0;
}
static int
psb6970_set_vid(struct switch_dev *dev, const struct switch_attr *attr,
struct switch_val *val)
{
struct psb6970_priv *priv = to_psb6970(dev);
priv->vlan_id[val->port_vlan] = val->value.i;
return 0;
}
static int
psb6970_get_vid(struct switch_dev *dev, const struct switch_attr *attr,
struct switch_val *val)
{
struct psb6970_priv *priv = to_psb6970(dev);
val->value.i = priv->vlan_id[val->port_vlan];
return 0;
}
static struct switch_attr psb6970_globals[] = {
{
.type = SWITCH_TYPE_INT,
.name = "enable_vlan",
.description = "Enable VLAN mode",
.set = psb6970_set_vlan,
.get = psb6970_get_vlan,
.max = 1},
};
static struct switch_attr psb6970_port[] = {
};
static struct switch_attr psb6970_vlan[] = {
{
.type = SWITCH_TYPE_INT,
.name = "vid",
.description = "VLAN ID (0-4094)",
.set = psb6970_set_vid,
.get = psb6970_get_vid,
.max = 4094,
},
};
static int psb6970_get_ports(struct switch_dev *dev, struct switch_val *val)
{
struct psb6970_priv *priv = to_psb6970(dev);
u8 ports = priv->vlan_table[val->port_vlan];
int i;
val->len = 0;
for (i = 0; i < PSB6970_NUM_PORTS; i++) {
struct switch_port *p;
if (!(ports & (1 << i)))
continue;
p = &val->value.ports[val->len++];
p->id = i;
if (priv->vlan_tagged & (1 << i))
p->flags = (1 << SWITCH_PORT_FLAG_TAGGED);
else
p->flags = 0;
}
return 0;
}
static int psb6970_set_ports(struct switch_dev *dev, struct switch_val *val)
{
struct psb6970_priv *priv = to_psb6970(dev);
u8 *vt = &priv->vlan_table[val->port_vlan];
int i, j;
*vt = 0;
for (i = 0; i < val->len; i++) {
struct switch_port *p = &val->value.ports[i];
if (p->flags & (1 << SWITCH_PORT_FLAG_TAGGED))
priv->vlan_tagged |= (1 << p->id);
else {
priv->vlan_tagged &= ~(1 << p->id);
priv->pvid[p->id] = val->port_vlan;
/* make sure that an untagged port does not
* appear in other vlans */
for (j = 0; j < PSB6970_MAX_VLANS; j++) {
if (j == val->port_vlan)
continue;
priv->vlan_table[j] &= ~(1 << p->id);
}
}
*vt |= 1 << p->id;
}
return 0;
}
static int psb6970_hw_apply(struct switch_dev *dev)
{
struct psb6970_priv *priv = to_psb6970(dev);
int i, j;
mutex_lock(&priv->reg_mutex);
if (priv->vlan) {
/* into the vlan translation unit */
for (j = 0; j < PSB6970_MAX_VLANS; j++) {
u8 vp = priv->vlan_table[j];
if (vp) {
priv->write(priv->phy, PSB6970_VFxL(j),
PSB6970_VFxL_VV | priv->vlan_id[j]);
priv->write(priv->phy, PSB6970_VFxH(j),
((vp & priv->
vlan_tagged) <<
PSB6970_VFxH_TM_SHIFT) | vp);
} else /* clear VLAN Valid flag for unused vlans */
priv->write(priv->phy, PSB6970_VFxL(j), 0);
}
}
/* update the port destination mask registers and tag settings */
for (i = 0; i < PSB6970_NUM_PORTS; i++) {
int dvid = 1, pbvm = 0x7f | PSB6970_PBVM_VSD, ec = 0;
if (priv->vlan) {
ec = PSB6970_EC_IFNTE;
dvid = priv->vlan_id[priv->pvid[i]];
pbvm |= PSB6970_PBVM_TBVE | PSB6970_PBVM_VMCE;
if ((i << 1) & priv->vlan_tagged)
pbvm |= PSB6970_PBVM_AOVTP | PSB6970_PBVM_VC;
}
priv->write(priv->phy, PSB6970_PBVM(i), pbvm);
if (!PSB6970_IS_CPU_PORT(i)) {
priv->write(priv->phy, PSB6970_EC(i), ec);
priv->write(priv->phy, PSB6970_DVID(i), dvid);
}
}
mutex_unlock(&priv->reg_mutex);
return 0;
}
static int psb6970_reset_switch(struct switch_dev *dev)
{
struct psb6970_priv *priv = to_psb6970(dev);
int i;
mutex_lock(&priv->reg_mutex);
memset(&priv->vlan, 0, sizeof(struct psb6970_priv) -
offsetof(struct psb6970_priv, vlan));
for (i = 0; i < PSB6970_MAX_VLANS; i++)
priv->vlan_id[i] = i;
mutex_unlock(&priv->reg_mutex);
return psb6970_hw_apply(dev);
}
static const struct switch_dev_ops psb6970_ops = {
.attr_global = {
.attr = psb6970_globals,
.n_attr = ARRAY_SIZE(psb6970_globals),
},
.attr_port = {
.attr = psb6970_port,
.n_attr = ARRAY_SIZE(psb6970_port),
},
.attr_vlan = {
.attr = psb6970_vlan,
.n_attr = ARRAY_SIZE(psb6970_vlan),
},
.get_port_pvid = psb6970_get_pvid,
.set_port_pvid = psb6970_set_pvid,
.get_vlan_ports = psb6970_get_ports,
.set_vlan_ports = psb6970_set_ports,
.apply_config = psb6970_hw_apply,
.reset_switch = psb6970_reset_switch,
};
static int psb6970_config_init(struct phy_device *pdev)
{
struct psb6970_priv *priv;
struct net_device *dev = pdev->attached_dev;
struct switch_dev *swdev;
int ret;
priv = kzalloc(sizeof(struct psb6970_priv), GFP_KERNEL);
if (priv == NULL)
return -ENOMEM;
priv->phy = pdev;
if (pdev->mdio.addr == 0)
printk(KERN_INFO "%s: psb6970 switch driver attached.\n",
pdev->attached_dev->name);
if (pdev->mdio.addr != 0) {
kfree(priv);
return 0;
}
pdev->supported = pdev->advertising = SUPPORTED_100baseT_Full;
mutex_init(&priv->reg_mutex);
priv->read = psb6970_mii_read;
priv->write = psb6970_mii_write;
pdev->priv = priv;
swdev = &priv->dev;
swdev->cpu_port = PSB6970_DEFAULT_PORT_CPU;
swdev->ops = &psb6970_ops;
swdev->name = "Lantiq PSB6970";
swdev->vlans = PSB6970_MAX_VLANS;
swdev->ports = PSB6970_NUM_PORTS;
if ((ret = register_switch(&priv->dev, pdev->attached_dev)) < 0) {
kfree(priv);
goto done;
}
ret = psb6970_reset_switch(&priv->dev);
if (ret) {
kfree(priv);
goto done;
}
dev->phy_ptr = priv;
done:
return ret;
}
static int psb6970_read_status(struct phy_device *phydev)
{
phydev->speed = SPEED_100;
phydev->duplex = DUPLEX_FULL;
phydev->link = 1;
phydev->state = PHY_RUNNING;
netif_carrier_on(phydev->attached_dev);
phydev->adjust_link(phydev->attached_dev);
return 0;
}
static int psb6970_config_aneg(struct phy_device *phydev)
{
return 0;
}
static int psb6970_probe(struct phy_device *pdev)
{
return 0;
}
static void psb6970_remove(struct phy_device *pdev)
{
struct psb6970_priv *priv = pdev->priv;
if (!priv)
return;
if (pdev->mdio.addr == 0)
unregister_switch(&priv->dev);
kfree(priv);
}
static int psb6970_fixup(struct phy_device *dev)
{
struct mii_bus *bus = dev->mdio.bus;
u16 reg;
/* look for the switch on the bus */
reg = bus->read(bus, PHYADDR(PSB6970_CI1)) & PSB6970_CI1_MASK;
if (reg != PSB6970_CI1_VAL)
return 0;
dev->phy_id = (reg << 16);
dev->phy_id |= bus->read(bus, PHYADDR(PSB6970_CI0)) & PSB6970_CI0_MASK;
return 0;
}
static struct phy_driver psb6970_driver = {
.name = "Lantiq PSB6970",
.phy_id = PSB6970_CI1_VAL << 16,
.phy_id_mask = 0xffff0000,
.features = PHY_BASIC_FEATURES,
.probe = psb6970_probe,
.remove = psb6970_remove,
.config_init = &psb6970_config_init,
.config_aneg = &psb6970_config_aneg,
.read_status = &psb6970_read_status,
};
int __init psb6970_init(void)
{
phy_register_fixup_for_id(PHY_ANY_ID, psb6970_fixup);
return phy_driver_register(&psb6970_driver, THIS_MODULE);
}
module_init(psb6970_init);
void __exit psb6970_exit(void)
{
phy_driver_unregister(&psb6970_driver);
}
module_exit(psb6970_exit);
MODULE_DESCRIPTION("Lantiq PSB6970 Switch");
MODULE_AUTHOR("Ithamar R. Adema <ithamar.adema@team-embedded.nl>");
MODULE_LICENSE("GPL");