+/*
+ * ar8216.c: AR8216 switch driver
+ *
+ * Copyright (C) 2009 Felix Fietkau <nbd@openwrt.org>
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/if.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/if_ether.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/netlink.h>
+#include <linux/bitops.h>
+#include <net/genetlink.h>
+#include <linux/switch.h>
+#include <linux/delay.h>
+#include <linux/phy.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include "ar8216.h"
+
+
+struct ar8216_priv {
+ struct switch_dev dev;
+ struct phy_device *phy;
+ u32 (*read)(struct ar8216_priv *priv, int reg);
+ void (*write)(struct ar8216_priv *priv, int reg, u32 val);
+ const struct net_device_ops *ndo_old;
+ struct net_device_ops ndo;
+
+ /* all fields below are cleared on reset */
+ bool vlan;
+ u8 vlan_id[AR8216_NUM_VLANS];
+ u8 vlan_table[AR8216_NUM_VLANS];
+ u8 vlan_tagged;
+ u16 pvid[AR8216_NUM_PORTS];
+};
+static struct switch_dev athdev;
+
+#define to_ar8216(_dev) container_of(_dev, struct ar8216_priv, dev)
+
+static inline void
+split_addr(u32 regaddr, u16 *r1, u16 *r2, u16 *page)
+{
+ regaddr >>= 1;
+ *r1 = regaddr & 0x1e;
+
+ regaddr >>= 5;
+ *r2 = regaddr & 0x7;
+
+ regaddr >>= 3;
+ *page = regaddr & 0x1ff;
+}
+
+static u32
+ar8216_mii_read(struct ar8216_priv *priv, int reg)
+{
+ struct phy_device *phy = priv->phy;
+ u16 r1, r2, page;
+ u16 lo, hi;
+
+ split_addr((u32) reg, &r1, &r2, &page);
+ phy->bus->write(phy->bus, 0x18, 0, page);
+ msleep(1); /* wait for the page switch to propagate */
+ lo = phy->bus->read(phy->bus, 0x10 | r2, r1);
+ hi = phy->bus->read(phy->bus, 0x10 | r2, r1 + 1);
+
+ return (hi << 16) | lo;
+}
+
+static void
+ar8216_mii_write(struct ar8216_priv *priv, int reg, u32 val)
+{
+ struct phy_device *phy = priv->phy;
+ u16 r1, r2, r3;
+ u16 lo, hi;
+
+ split_addr((u32) reg, &r1, &r2, &r3);
+ phy->bus->write(phy->bus, 0x18, 0, r3);
+ msleep(1); /* wait for the page switch to propagate */
+
+ lo = val & 0xffff;
+ hi = (u16) (val >> 16);
+ phy->bus->write(phy->bus, 0x10 | r2, r1 + 1, hi);
+ phy->bus->write(phy->bus, 0x10 | r2, r1, lo);
+}
+
+static u32
+ar8216_rmw(struct ar8216_priv *priv, int reg, u32 mask, u32 val)
+{
+ u32 v;
+
+ v = priv->read(priv, reg);
+ v &= ~mask;
+ v |= val;
+ priv->write(priv, reg, v);
+
+ return v;
+}
+
+static int
+ar8216_set_vlan(struct switch_dev *dev, const struct switch_attr *attr,
+ struct switch_val *val)
+{
+ struct ar8216_priv *priv = to_ar8216(dev);
+ priv->vlan = !!val->value.i;
+ return 0;
+}
+
+static int
+ar8216_get_vlan(struct switch_dev *dev, const struct switch_attr *attr,
+ struct switch_val *val)
+{
+ struct ar8216_priv *priv = to_ar8216(dev);
+ val->value.i = priv->vlan;
+ return 0;
+}
+
+
+static int
+ar8216_set_pvid(struct switch_dev *dev, int port, int vlan)
+{
+ struct ar8216_priv *priv = to_ar8216(dev);
+ priv->pvid[port] = vlan;
+ return 0;
+}
+
+static int
+ar8216_get_pvid(struct switch_dev *dev, int port, int *vlan)
+{
+ struct ar8216_priv *priv = to_ar8216(dev);
+ *vlan = priv->pvid[port];
+ return 0;
+}
+
+static int
+ar8216_set_vid(struct switch_dev *dev, const struct switch_attr *attr,
+ struct switch_val *val)
+{
+ struct ar8216_priv *priv = to_ar8216(dev);
+ priv->vlan_id[val->port_vlan] = val->value.i;
+ return 0;
+}
+
+static int
+ar8216_get_vid(struct switch_dev *dev, const struct switch_attr *attr,
+ struct switch_val *val)
+{
+ struct ar8216_priv *priv = to_ar8216(dev);
+ val->value.i = priv->vlan_id[val->port_vlan];
+ return 0;
+}
+
+
+static int
+ar8216_mangle_tx(struct sk_buff *skb, struct net_device *dev)
+{
+ struct ar8216_priv *priv = dev->phy_ptr;
+ unsigned char *buf;
+
+ if (unlikely(!priv))
+ goto error;
+
+ if (!priv->vlan)
+ goto send;
+
+ if (unlikely(skb_headroom(skb) < 2)) {
+ if (pskb_expand_head(skb, 2, 0, GFP_ATOMIC) < 0)
+ goto error;
+ }
+
+ buf = skb_push(skb, 2);
+ buf[0] = 0x10;
+ buf[1] = 0x80;
+
+send:
+ return priv->ndo_old->ndo_start_xmit(skb, dev);
+
+error:
+ dev_kfree_skb_any(skb);
+ return 0;
+}
+
+static int
+ar8216_mangle_rx(struct sk_buff *skb, int napi)
+{
+ struct ar8216_priv *priv;
+ struct net_device *dev;
+ unsigned char *buf;
+ int port, vlan;
+
+ dev = skb->dev;
+ if (!dev)
+ goto error;
+
+ priv = dev->phy_ptr;
+ if (!priv)
+ goto error;
+
+ /* don't strip the header if vlan mode is disabled */
+ if (!priv->vlan)
+ goto recv;
+
+ /* strip header, get vlan id */
+ buf = skb->data;
+ skb_pull(skb, 2);
+
+ /* check for vlan header presence */
+ if ((buf[12 + 2] != 0x81) || (buf[13 + 2] != 0x00))
+ goto recv;
+
+ port = buf[0] & 0xf;
+
+ /* no need to fix up packets coming from a tagged source */
+ if (priv->vlan_tagged & (1 << port))
+ goto recv;
+
+ /* lookup port vid from local table, the switch passes an invalid vlan id */
+ vlan = priv->pvid[port];
+
+ buf[14 + 2] &= 0xf0;
+ buf[14 + 2] |= vlan >> 8;
+ buf[15 + 2] = vlan & 0xff;
+
+recv:
+ skb->protocol = eth_type_trans(skb, skb->dev);
+
+ if (napi)
+ return netif_receive_skb(skb);
+ else
+ return netif_rx(skb);
+
+error:
+ /* no vlan? eat the packet! */
+ dev_kfree_skb_any(skb);
+ return 0;
+}
+
+static int
+ar8216_netif_rx(struct sk_buff *skb)
+{
+ return ar8216_mangle_rx(skb, 0);
+}
+
+static int
+ar8216_netif_receive_skb(struct sk_buff *skb)
+{
+ return ar8216_mangle_rx(skb, 1);
+}
+
+
+static struct switch_attr ar8216_globals[] = {
+ {
+ .type = SWITCH_TYPE_INT,
+ .name = "enable_vlan",
+ .description = "Enable VLAN mode",
+ .set = ar8216_set_vlan,
+ .get = ar8216_get_vlan,
+ .max = 1
+ },
+};
+
+static struct switch_attr ar8216_port[] = {
+};
+
+static struct switch_attr ar8216_vlan[] = {
+ {
+ .type = SWITCH_TYPE_INT,
+ .name = "pvid",
+ .description = "VLAN ID",
+ .set = ar8216_set_vid,
+ .get = ar8216_get_vid,
+ .max = 4095,
+ },
+};
+
+
+static int
+ar8216_get_ports(struct switch_dev *dev, struct switch_val *val)
+{
+ struct ar8216_priv *priv = to_ar8216(dev);
+ u8 ports = priv->vlan_table[val->port_vlan];
+ int i;
+
+ val->len = 0;
+ for (i = 0; i < AR8216_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
+ar8216_set_ports(struct switch_dev *dev, struct switch_val *val)
+{
+ struct ar8216_priv *priv = to_ar8216(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 < AR8216_NUM_VLANS; j++) {
+ if (j == val->port_vlan)
+ continue;
+ priv->vlan_table[j] &= ~(1 << p->id);
+ }
+ }
+
+ *vt |= 1 << p->id;
+ }
+ return 0;
+}
+
+static int
+ar8216_wait_bit(struct ar8216_priv *priv, int reg, u32 mask, u32 val)
+{
+ int timeout = 20;
+
+ while ((priv->read(priv, reg) & mask) != val) {
+ if (timeout-- <= 0) {
+ printk(KERN_ERR "ar8216: timeout waiting for operation to complete\n");
+ return 1;
+ }
+ }
+ return 0;
+}
+
+static void
+ar8216_vtu_op(struct ar8216_priv *priv, u32 op, u32 val)
+{
+ if (ar8216_wait_bit(priv, AR8216_REG_VTU, AR8216_VTU_ACTIVE, 0))
+ return;
+ if ((op & AR8216_VTU_OP) == AR8216_VTU_OP_LOAD) {
+ val &= AR8216_VTUDATA_MEMBER;
+ val |= AR8216_VTUDATA_VALID;
+ priv->write(priv, AR8216_REG_VTU_DATA, val);
+ }
+ op |= AR8216_VTU_ACTIVE;
+ priv->write(priv, AR8216_REG_VTU, op);
+}
+
+static int
+ar8216_hw_apply(struct switch_dev *dev)
+{
+ struct ar8216_priv *priv = to_ar8216(dev);
+ u8 portmask[AR8216_NUM_PORTS];
+ int i, j;
+
+ /* flush all vlan translation unit entries */
+ ar8216_vtu_op(priv, AR8216_VTU_OP_FLUSH, 0);
+
+ memset(portmask, 0, sizeof(portmask));
+ if (priv->vlan) {
+ /* calculate the port destination masks and load vlans
+ * into the vlan translation unit */
+ for (j = 0; j < AR8216_NUM_VLANS; j++) {
+ u8 vp = priv->vlan_table[j];
+
+ if (!vp)
+ continue;
+
+ for (i = 0; i < AR8216_NUM_PORTS; i++) {
+ u8 mask = (1 << i);
+ if (vp & mask)
+ portmask[i] |= vp & ~mask;
+ }
+
+ if (!priv->vlan_table[j])
+ continue;
+
+ ar8216_vtu_op(priv,
+ AR8216_VTU_OP_LOAD |
+ (priv->vlan_id[j] << AR8216_VTU_VID_S),
+ priv->vlan_table[j]);
+ }
+ } else {
+ /* vlan disabled:
+ * isolate all ports, but connect them to the cpu port */
+ for (i = 0; i < AR8216_NUM_PORTS; i++) {
+ if (i == AR8216_PORT_CPU)
+ continue;
+
+ portmask[i] = 1 << AR8216_PORT_CPU;
+ portmask[AR8216_PORT_CPU] |= (1 << i);
+ }
+ }
+
+ /* update the port destination mask registers and tag settings */
+ for (i = 0; i < AR8216_NUM_PORTS; i++) {
+ int egress, ingress;
+ int pvid;
+
+ if (priv->vlan) {
+ pvid = priv->vlan_id[priv->pvid[i]];
+ } else {
+ pvid = i;
+ }
+
+ if (priv->vlan && (priv->vlan_tagged & (1 << i))) {
+ egress = AR8216_OUT_ADD_VLAN;
+ } else {
+ egress = AR8216_OUT_STRIP_VLAN;
+ }
+ ingress = AR8216_IN_SECURE;
+
+ ar8216_rmw(priv, AR8216_REG_PORT_CTRL(i),
+ AR8216_PORT_CTRL_LEARN | AR8216_PORT_CTRL_VLAN_MODE |
+ AR8216_PORT_CTRL_SINGLE_VLAN | AR8216_PORT_CTRL_STATE |
+ AR8216_PORT_CTRL_HEADER | AR8216_PORT_CTRL_LEARN_LOCK,
+ AR8216_PORT_CTRL_LEARN |
+ (priv->vlan && i == AR8216_PORT_CPU ?
+ AR8216_PORT_CTRL_HEADER : 0) |
+ (egress << AR8216_PORT_CTRL_VLAN_MODE_S) |
+ (AR8216_PORT_STATE_FORWARD << AR8216_PORT_CTRL_STATE_S));
+
+ ar8216_rmw(priv, AR8216_REG_PORT_VLAN(i),
+ AR8216_PORT_VLAN_DEST_PORTS | AR8216_PORT_VLAN_MODE |
+ AR8216_PORT_VLAN_DEFAULT_ID,
+ (portmask[i] << AR8216_PORT_VLAN_DEST_PORTS_S) |
+ (ingress << AR8216_PORT_VLAN_MODE_S) |
+ (pvid << AR8216_PORT_VLAN_DEFAULT_ID_S));
+ }
+
+ return 0;
+}
+
+static int
+ar8216_reset_switch(struct switch_dev *dev)
+{
+ struct ar8216_priv *priv = to_ar8216(dev);
+ int i;
+
+ memset(&priv->vlan, 0, sizeof(struct ar8216_priv) -
+ offsetof(struct ar8216_priv, vlan));
+ for (i = 0; i < AR8216_NUM_VLANS; i++) {
+ priv->vlan_id[i] = i;
+ }
+ for (i = 0; i < AR8216_NUM_PORTS; i++) {
+ /* Enable port learning and tx */
+ priv->write(priv, AR8216_REG_PORT_CTRL(i),
+ AR8216_PORT_CTRL_LEARN |
+ (4 << AR8216_PORT_CTRL_STATE_S));
+
+ priv->write(priv, AR8216_REG_PORT_VLAN(i), 0);
+
+ /* Configure all PHYs */
+ if (i == AR8216_PORT_CPU) {
+ priv->write(priv, AR8216_REG_PORT_STATUS(i),
+ AR8216_PORT_STATUS_LINK_UP |
+ AR8216_PORT_STATUS_SPEED |
+ AR8216_PORT_STATUS_TXMAC |
+ AR8216_PORT_STATUS_RXMAC |
+ AR8216_PORT_STATUS_DUPLEX);
+ } else {
+ priv->write(priv, AR8216_REG_PORT_STATUS(i),
+ AR8216_PORT_STATUS_LINK_AUTO);
+ }
+ }
+ /* XXX: undocumented magic from atheros, required! */
+ priv->write(priv, 0x38, 0xc000050e);
+
+ ar8216_rmw(priv, AR8216_REG_GLOBAL_CTRL,
+ AR8216_GCTRL_MTU, 1518 + 8 + 2);
+
+ return ar8216_hw_apply(dev);
+}
+
+static int
+ar8216_config_init(struct phy_device *pdev)
+{
+ struct ar8216_priv *priv;
+ struct net_device *dev = pdev->attached_dev;
+ int ret;
+
+ printk("%s: AR8216 PHY driver attached.\n", pdev->attached_dev->name);
+ pdev->supported = ADVERTISED_100baseT_Full;
+ pdev->advertising = ADVERTISED_100baseT_Full;
+
+ priv = kzalloc(sizeof(struct ar8216_priv), GFP_KERNEL);
+ if (priv == NULL)
+ return -ENOMEM;
+
+ priv->phy = pdev;
+ priv->read = ar8216_mii_read;
+ priv->write = ar8216_mii_write;
+ memcpy(&priv->dev, &athdev, sizeof(struct switch_dev));
+ pdev->priv = priv;
+ if ((ret = register_switch(&priv->dev, pdev->attached_dev)) < 0) {
+ kfree(priv);
+ goto done;
+ }
+
+ ret = ar8216_reset_switch(&priv->dev);
+ if (ret)
+ goto done;
+
+ dev->phy_ptr = priv;
+ pdev->pkt_align = 2;
+ pdev->netif_receive_skb = ar8216_netif_receive_skb;
+ pdev->netif_rx = ar8216_netif_rx;
+
+ priv->ndo_old = dev->netdev_ops;
+ memcpy(&priv->ndo, priv->ndo_old, sizeof(struct net_device_ops));
+ priv->ndo.ndo_start_xmit = ar8216_mangle_tx;
+ dev->netdev_ops = &priv->ndo;
+
+done:
+ return ret;
+}
+
+static int
+ar8216_read_status(struct phy_device *phydev)
+{
+ struct ar8216_priv *priv = phydev->priv;
+
+ phydev->speed = SPEED_100;
+ phydev->duplex = DUPLEX_FULL;
+ phydev->state = PHY_UP;
+
+ /* flush the address translation unit */
+ if (ar8216_wait_bit(priv, AR8216_REG_ATU, AR8216_ATU_ACTIVE, 0))
+ return -ETIMEDOUT;
+
+ priv->write(priv, AR8216_REG_ATU, AR8216_ATU_OP_FLUSH);
+
+ return 0;
+}
+
+static int
+ar8216_config_aneg(struct phy_device *phydev)
+{
+ return 0;
+}
+
+static int
+ar8216_probe(struct phy_device *pdev)
+{
+ struct ar8216_priv priv;
+
+ u8 id, rev;
+ u32 val;
+
+ priv.phy = pdev;
+ val = ar8216_mii_read(&priv, AR8216_REG_CTRL);
+ rev = val & 0xff;
+ id = (val >> 8) & 0xff;
+ if ((id != 1) || (rev != 1))
+ return -ENODEV;
+
+ return 0;
+}
+
+static void
+ar8216_remove(struct phy_device *pdev)
+{
+ struct ar8216_priv *priv = pdev->priv;
+ struct net_device *dev = pdev->attached_dev;
+
+ if (!priv)
+ return;
+
+ if (priv->ndo_old && dev)
+ dev->netdev_ops = priv->ndo_old;
+ unregister_switch(&priv->dev);
+ kfree(priv);
+}
+
+/* template */
+static struct switch_dev athdev = {
+ .name = "Atheros AR8216",
+ .cpu_port = AR8216_PORT_CPU,
+ .ports = AR8216_NUM_PORTS,
+ .vlans = AR8216_NUM_VLANS,
+ .attr_global = {
+ .attr = ar8216_globals,
+ .n_attr = ARRAY_SIZE(ar8216_globals),
+ },
+ .attr_port = {
+ .attr = ar8216_port,
+ .n_attr = ARRAY_SIZE(ar8216_port),
+ },
+ .attr_vlan = {
+ .attr = ar8216_vlan,
+ .n_attr = ARRAY_SIZE(ar8216_vlan),
+ },
+ .get_port_pvid = ar8216_get_pvid,
+ .set_port_pvid = ar8216_set_pvid,
+ .get_vlan_ports = ar8216_get_ports,
+ .set_vlan_ports = ar8216_set_ports,
+ .apply_config = ar8216_hw_apply,
+ .reset_switch = ar8216_reset_switch,
+};
+
+static struct phy_driver ar8216_driver = {
+ .name = "Atheros AR8216",
+ .features = PHY_BASIC_FEATURES,
+ .probe = ar8216_probe,
+ .remove = ar8216_remove,
+ .config_init = &ar8216_config_init,
+ .config_aneg = &ar8216_config_aneg,
+ .read_status = &ar8216_read_status,
+ .driver = { .owner = THIS_MODULE },
+};
+
+int __init
+ar8216_init(void)
+{
+ return phy_driver_register(&ar8216_driver);
+}
+
+void __exit
+ar8216_exit(void)
+{
+ phy_driver_unregister(&ar8216_driver);
+}
+
+module_init(ar8216_init);
+module_exit(ar8216_exit);
+MODULE_LICENSE("GPL");
+
projects / openwrt / openwrt.git / commitdiff