648 lines
14 KiB
C
648 lines
14 KiB
C
/*
|
|
* 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 {
|
|
int (*hardstart)(struct sk_buff *skb, struct net_device *dev);
|
|
|
|
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);
|
|
|
|
/* 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->hardstart(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 |
|
|
(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;
|
|
priv->hardstart = dev->hard_start_xmit;
|
|
pdev->netif_receive_skb = ar8216_netif_receive_skb;
|
|
pdev->netif_rx = ar8216_netif_rx;
|
|
dev->hard_start_xmit = ar8216_mangle_tx;
|
|
|
|
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->hardstart && dev)
|
|
dev->hard_start_xmit = priv->hardstart;
|
|
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");
|
|
|