diff options
Diffstat (limited to 'target/linux/generic/files/drivers/net/phy/mvswitch.c')
| -rw-r--r-- | target/linux/generic/files/drivers/net/phy/mvswitch.c | 422 |
1 files changed, 422 insertions, 0 deletions
diff --git a/target/linux/generic/files/drivers/net/phy/mvswitch.c b/target/linux/generic/files/drivers/net/phy/mvswitch.c new file mode 100644 index 000000000..d754951ac --- /dev/null +++ b/target/linux/generic/files/drivers/net/phy/mvswitch.c @@ -0,0 +1,422 @@ +/* + * Marvell 88E6060 switch driver + * Copyright (c) 2008 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 v2 as published by the + * Free Software Foundation + */ +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/errno.h> +#include <linux/unistd.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/init.h> +#include <linux/delay.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> +#include <linux/spinlock.h> +#include <linux/mm.h> +#include <linux/module.h> +#include <linux/mii.h> +#include <linux/ethtool.h> +#include <linux/phy.h> +#include <linux/if_vlan.h> + +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/uaccess.h> +#include "mvswitch.h" + +/* Undefine this to use trailer mode instead. + * I don't know if header mode works with all chips */ +#define HEADER_MODE 1 + +MODULE_DESCRIPTION("Marvell 88E6060 Switch driver"); +MODULE_AUTHOR("Felix Fietkau"); +MODULE_LICENSE("GPL"); + +#define MVSWITCH_MAGIC 0x88E6060 + +struct mvswitch_priv { + netdev_features_t orig_features; + u8 vlans[16]; +}; + +#define to_mvsw(_phy) ((struct mvswitch_priv *) (_phy)->priv) + +static inline u16 +r16(struct phy_device *phydev, int addr, int reg) +{ + return phydev->bus->read(phydev->bus, addr, reg); +} + +static inline void +w16(struct phy_device *phydev, int addr, int reg, u16 val) +{ + phydev->bus->write(phydev->bus, addr, reg, val); +} + + +static struct sk_buff * +mvswitch_mangle_tx(struct net_device *dev, struct sk_buff *skb) +{ + struct mvswitch_priv *priv; + char *buf = NULL; + u16 vid; + + priv = dev->phy_ptr; + if (unlikely(!priv)) + goto error; + + if (unlikely(skb->len < 16)) + goto error; + +#ifdef HEADER_MODE + if (__vlan_hwaccel_get_tag(skb, &vid)) + goto error; + + if (skb_cloned(skb) || (skb->len <= 62) || (skb_headroom(skb) < MV_HEADER_SIZE)) { + if (pskb_expand_head(skb, MV_HEADER_SIZE, (skb->len < 62 ? 62 - skb->len : 0), GFP_ATOMIC)) + goto error_expand; + if (skb->len < 62) + skb->len = 62; + } + buf = skb_push(skb, MV_HEADER_SIZE); +#else + if (__vlan_get_tag(skb, &vid)) + goto error; + + if (unlikely((vid > 15 || !priv->vlans[vid]))) + goto error; + + if (skb->len <= 64) { + if (pskb_expand_head(skb, 0, 64 + MV_TRAILER_SIZE - skb->len, GFP_ATOMIC)) + goto error_expand; + + buf = skb->data + 64; + skb->len = 64 + MV_TRAILER_SIZE; + } else { + if (skb_cloned(skb) || unlikely(skb_tailroom(skb) < 4)) { + if (pskb_expand_head(skb, 0, 4, GFP_ATOMIC)) + goto error_expand; + } + buf = skb_put(skb, 4); + } + + /* move the ethernet header 4 bytes forward, overwriting the vlan tag */ + memmove(skb->data + 4, skb->data, 12); + skb->data += 4; + skb->len -= 4; + skb->mac_header += 4; +#endif + + if (!buf) + goto error; + + +#ifdef HEADER_MODE + /* prepend the tag */ + *((__be16 *) buf) = cpu_to_be16( + ((vid << MV_HEADER_VLAN_S) & MV_HEADER_VLAN_M) | + ((priv->vlans[vid] << MV_HEADER_PORTS_S) & MV_HEADER_PORTS_M) + ); +#else + /* append the tag */ + *((__be32 *) buf) = cpu_to_be32(( + (MV_TRAILER_OVERRIDE << MV_TRAILER_FLAGS_S) | + ((priv->vlans[vid] & MV_TRAILER_PORTS_M) << MV_TRAILER_PORTS_S) + )); +#endif + + return skb; + +error_expand: + if (net_ratelimit()) + printk("%s: failed to expand/update skb for the switch\n", dev->name); + +error: + /* any errors? drop the packet! */ + dev_kfree_skb_any(skb); + return NULL; +} + +static void +mvswitch_mangle_rx(struct net_device *dev, struct sk_buff *skb) +{ + struct mvswitch_priv *priv; + unsigned char *buf; + int vlan = -1; + int i; + + priv = dev->phy_ptr; + if (WARN_ON_ONCE(!priv)) + return; + +#ifdef HEADER_MODE + buf = skb->data; + skb_pull(skb, MV_HEADER_SIZE); +#else + buf = skb->data + skb->len - MV_TRAILER_SIZE; + if (buf[0] != 0x80) + return; +#endif + + /* look for the vlan matching the incoming port */ + for (i = 0; i < ARRAY_SIZE(priv->vlans); i++) { + if ((1 << buf[1]) & priv->vlans[i]) + vlan = i; + } + + if (vlan == -1) + return; + + __vlan_hwaccel_put_tag(skb, vlan); +} + + +static int +mvswitch_wait_mask(struct phy_device *pdev, int addr, int reg, u16 mask, u16 val) +{ + int i = 100; + u16 r; + + do { + r = r16(pdev, addr, reg) & mask; + if (r == val) + return 0; + } while(--i > 0); + return -ETIMEDOUT; +} + +static int +mvswitch_config_init(struct phy_device *pdev) +{ + struct mvswitch_priv *priv = to_mvsw(pdev); + struct net_device *dev = pdev->attached_dev; + u8 vlmap = 0; + int i; + + if (!dev) + return -EINVAL; + + printk("%s: Marvell 88E6060 PHY driver attached.\n", dev->name); + pdev->supported = ADVERTISED_100baseT_Full; + pdev->advertising = ADVERTISED_100baseT_Full; + dev->phy_ptr = priv; + pdev->irq = PHY_POLL; +#ifdef HEADER_MODE + dev->flags |= IFF_PROMISC; +#endif + + /* initialize default vlans */ + for (i = 0; i < MV_PORTS; i++) + priv->vlans[(i == MV_WANPORT ? 2 : 1)] |= (1 << i); + + /* before entering reset, disable all ports */ + for (i = 0; i < MV_PORTS; i++) + w16(pdev, MV_PORTREG(CONTROL, i), 0x00); + + msleep(2); /* wait for the status change to settle in */ + + /* put the ATU in reset */ + w16(pdev, MV_SWITCHREG(ATU_CTRL), MV_ATUCTL_RESET); + + i = mvswitch_wait_mask(pdev, MV_SWITCHREG(ATU_CTRL), MV_ATUCTL_RESET, 0); + if (i < 0) { + printk("%s: Timeout waiting for the switch to reset.\n", dev->name); + return i; + } + + /* set the ATU flags */ + w16(pdev, MV_SWITCHREG(ATU_CTRL), + MV_ATUCTL_NO_LEARN | + MV_ATUCTL_ATU_1K | + MV_ATUCTL_AGETIME(MV_ATUCTL_AGETIME_MIN) /* minimum without disabling ageing */ + ); + + /* initialize the cpu port */ + w16(pdev, MV_PORTREG(CONTROL, MV_CPUPORT), +#ifdef HEADER_MODE + MV_PORTCTRL_HEADER | +#else + MV_PORTCTRL_RXTR | + MV_PORTCTRL_TXTR | +#endif + MV_PORTCTRL_ENABLED + ); + /* wait for the phy change to settle in */ + msleep(2); + for (i = 0; i < MV_PORTS; i++) { + u8 pvid = 0; + int j; + + vlmap = 0; + + /* look for the matching vlan */ + for (j = 0; j < ARRAY_SIZE(priv->vlans); j++) { + if (priv->vlans[j] & (1 << i)) { + vlmap = priv->vlans[j]; + pvid = j; + } + } + /* leave port unconfigured if it's not part of a vlan */ + if (!vlmap) + continue; + + /* add the cpu port to the allowed destinations list */ + vlmap |= (1 << MV_CPUPORT); + + /* take port out of its own vlan destination map */ + vlmap &= ~(1 << i); + + /* apply vlan settings */ + w16(pdev, MV_PORTREG(VLANMAP, i), + MV_PORTVLAN_PORTS(vlmap) | + MV_PORTVLAN_ID(i) + ); + + /* re-enable port */ + w16(pdev, MV_PORTREG(CONTROL, i), + MV_PORTCTRL_ENABLED + ); + } + + w16(pdev, MV_PORTREG(VLANMAP, MV_CPUPORT), + MV_PORTVLAN_ID(MV_CPUPORT) + ); + + /* set the port association vector */ + for (i = 0; i <= MV_PORTS; i++) { + w16(pdev, MV_PORTREG(ASSOC, i), + MV_PORTASSOC_PORTS(1 << i) + ); + } + + /* init switch control */ + w16(pdev, MV_SWITCHREG(CTRL), + MV_SWITCHCTL_MSIZE | + MV_SWITCHCTL_DROP + ); + + dev->eth_mangle_rx = mvswitch_mangle_rx; + dev->eth_mangle_tx = mvswitch_mangle_tx; + priv->orig_features = dev->features; + +#ifdef HEADER_MODE + dev->priv_flags |= IFF_NO_IP_ALIGN; + dev->features |= NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX; +#else + dev->features |= NETIF_F_HW_VLAN_RX; +#endif + + return 0; +} + +static int +mvswitch_read_status(struct phy_device *pdev) +{ + pdev->speed = SPEED_100; + pdev->duplex = DUPLEX_FULL; + pdev->link = 1; + + /* XXX ugly workaround: we can't force the switch + * to gracefully handle hosts moving from one port to another, + * so we have to regularly clear the ATU database */ + + /* wait for the ATU to become available */ + mvswitch_wait_mask(pdev, MV_SWITCHREG(ATU_OP), MV_ATUOP_INPROGRESS, 0); + + /* flush the ATU */ + w16(pdev, MV_SWITCHREG(ATU_OP), + MV_ATUOP_INPROGRESS | + MV_ATUOP_FLUSH_ALL + ); + + /* wait for operation to complete */ + mvswitch_wait_mask(pdev, MV_SWITCHREG(ATU_OP), MV_ATUOP_INPROGRESS, 0); + + return 0; +} + +static int +mvswitch_config_aneg(struct phy_device *phydev) +{ + return 0; +} + +static void +mvswitch_remove(struct phy_device *pdev) +{ + struct mvswitch_priv *priv = to_mvsw(pdev); + struct net_device *dev = pdev->attached_dev; + + dev->phy_ptr = NULL; + dev->eth_mangle_rx = NULL; + dev->eth_mangle_tx = NULL; + dev->features = priv->orig_features; + dev->priv_flags &= ~IFF_NO_IP_ALIGN; + kfree(priv); +} + +static int +mvswitch_probe(struct phy_device *pdev) +{ + struct mvswitch_priv *priv; + + priv = kzalloc(sizeof(struct mvswitch_priv), GFP_KERNEL); + if (priv == NULL) + return -ENOMEM; + + pdev->priv = priv; + + return 0; +} + +static int +mvswitch_fixup(struct phy_device *dev) +{ + u16 reg; + + if (dev->addr != 0x10) + return 0; + + reg = dev->bus->read(dev->bus, MV_PORTREG(IDENT, 0)) & MV_IDENT_MASK; + if (reg != MV_IDENT_VALUE) + return 0; + + dev->phy_id = MVSWITCH_MAGIC; + return 0; +} + + +static struct phy_driver mvswitch_driver = { + .name = "Marvell 88E6060", + .phy_id = MVSWITCH_MAGIC, + .phy_id_mask = 0xffffffff, + .features = PHY_BASIC_FEATURES, + .probe = &mvswitch_probe, + .remove = &mvswitch_remove, + .config_init = &mvswitch_config_init, + .config_aneg = &mvswitch_config_aneg, + .read_status = &mvswitch_read_status, + .driver = { .owner = THIS_MODULE,}, +}; + +static int __init +mvswitch_init(void) +{ + phy_register_fixup_for_id(PHY_ANY_ID, mvswitch_fixup); + return phy_driver_register(&mvswitch_driver); +} + +static void __exit +mvswitch_exit(void) +{ + phy_driver_unregister(&mvswitch_driver); +} + +module_init(mvswitch_init); +module_exit(mvswitch_exit); |