diff options
Diffstat (limited to 'target/linux/generic-2.6/files-2.6.31/drivers/net/phy/ar8216.c')
-rw-r--r-- | target/linux/generic-2.6/files-2.6.31/drivers/net/phy/ar8216.c | 651 |
1 files changed, 651 insertions, 0 deletions
diff --git a/target/linux/generic-2.6/files-2.6.31/drivers/net/phy/ar8216.c b/target/linux/generic-2.6/files-2.6.31/drivers/net/phy/ar8216.c new file mode 100644 index 0000000..93e4b33 --- /dev/null +++ b/target/linux/generic-2.6/files-2.6.31/drivers/net/phy/ar8216.c @@ -0,0 +1,651 @@ +/* + * 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"); + |