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