--- /dev/null
+/*
+ * 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)
+{
+ return phydev->bus->read(phydev->bus, PHYADDR(reg));
+}
+
+static void psb6970_mii_write(struct phy_device *phydev, int reg, u16 val)
+{
+ phydev->bus->write(phydev->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 = "pvid",
+ .description = "VLAN ID",
+ .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->addr == 0)
+ printk(KERN_INFO "%s: psb6970 switch driver attached.\n",
+ pdev->attached_dev->name);
+
+ if (pdev->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->addr == 0)
+ unregister_switch(&priv->dev);
+ kfree(priv);
+}
+
+static int psb6970_fixup(struct phy_device *dev)
+{
+ struct mii_bus *bus = dev->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,
+ .driver = {.owner = THIS_MODULE},
+};
+
+int __init psb6970_init(void)
+{
+ phy_register_fixup_for_id(PHY_ANY_ID, psb6970_fixup);
+ return phy_driver_register(&psb6970_driver);
+}
+
+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");
projects / openwrt.git / commitdiff