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0b2c1d8b9a
ath25 requires a 88E6060 driver to support boards such as Fonera 2.0g (FON2202). The swconfig based mvswitch driver has not yet been ported to the 5.10 kernel as the only user is the ath25 target while all other targets have been switched to the upstream DSA implementation. Switching ath25 to the DSA implementation is a complex task, since we need either per-board platform data or DTS support. ath25 lacks both of them and builds only a single generic image. So we need to keep the swconfig driver implementation to easly and quickly port ath25 to the 5.10 kernel. Since porting the mvswitch driver to 5.10 as a generic driver is not an option, and since the ath25 is its only user, make mvswitch a target specific driver to be able to port it to the 5.10 kernel as part of the kernel version update of the target. This will allow us quickly migrate to the next kernel version and not delay the next firmware release. Suggested-by: Felix Fietkau <nbd@nbd.name> Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
447 lines
9.5 KiB
C
447 lines
9.5 KiB
C
/*
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* Marvell 88E6060 switch driver
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* Copyright (c) 2008 Felix Fietkau <nbd@nbd.name>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License v2 as published by the
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* Free Software Foundation
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*/
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/unistd.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/spinlock.h>
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#include <linux/mm.h>
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#include <linux/module.h>
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#include <linux/mii.h>
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#include <linux/ethtool.h>
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#include <linux/phy.h>
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#include <linux/if_vlan.h>
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#include <linux/version.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/uaccess.h>
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#include "mvswitch.h"
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/* Undefine this to use trailer mode instead.
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* I don't know if header mode works with all chips */
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#define HEADER_MODE 1
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MODULE_DESCRIPTION("Marvell 88E6060 Switch driver");
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MODULE_AUTHOR("Felix Fietkau");
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MODULE_LICENSE("GPL");
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#define MVSWITCH_MAGIC 0x88E6060
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struct mvswitch_priv {
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netdev_features_t orig_features;
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u8 vlans[16];
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};
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#define to_mvsw(_phy) ((struct mvswitch_priv *) (_phy)->priv)
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static inline u16
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r16(struct phy_device *phydev, int addr, int reg)
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{
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struct mii_bus *bus = phydev->mdio.bus;
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return bus->read(bus, addr, reg);
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}
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static inline void
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w16(struct phy_device *phydev, int addr, int reg, u16 val)
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{
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struct mii_bus *bus = phydev->mdio.bus;
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bus->write(bus, addr, reg, val);
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}
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static struct sk_buff *
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mvswitch_mangle_tx(struct net_device *dev, struct sk_buff *skb)
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{
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struct mvswitch_priv *priv;
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char *buf = NULL;
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u16 vid;
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priv = dev->phy_ptr;
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if (unlikely(!priv))
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goto error;
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if (unlikely(skb->len < 16))
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goto error;
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#ifdef HEADER_MODE
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if (__vlan_hwaccel_get_tag(skb, &vid))
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goto error;
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if (skb_cloned(skb) || (skb->len <= 62) || (skb_headroom(skb) < MV_HEADER_SIZE)) {
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if (pskb_expand_head(skb, MV_HEADER_SIZE, (skb->len < 62 ? 62 - skb->len : 0), GFP_ATOMIC))
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goto error_expand;
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if (skb->len < 62)
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skb->len = 62;
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}
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buf = skb_push(skb, MV_HEADER_SIZE);
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#else
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if (__vlan_get_tag(skb, &vid))
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goto error;
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if (unlikely((vid > 15 || !priv->vlans[vid])))
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goto error;
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if (skb->len <= 64) {
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if (pskb_expand_head(skb, 0, 64 + MV_TRAILER_SIZE - skb->len, GFP_ATOMIC))
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goto error_expand;
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buf = skb->data + 64;
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skb->len = 64 + MV_TRAILER_SIZE;
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} else {
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if (skb_cloned(skb) || unlikely(skb_tailroom(skb) < 4)) {
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if (pskb_expand_head(skb, 0, 4, GFP_ATOMIC))
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goto error_expand;
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}
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buf = skb_put(skb, 4);
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}
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/* move the ethernet header 4 bytes forward, overwriting the vlan tag */
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memmove(skb->data + 4, skb->data, 12);
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skb->data += 4;
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skb->len -= 4;
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skb->mac_header += 4;
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#endif
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if (!buf)
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goto error;
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#ifdef HEADER_MODE
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/* prepend the tag */
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*((__be16 *) buf) = cpu_to_be16(
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((vid << MV_HEADER_VLAN_S) & MV_HEADER_VLAN_M) |
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((priv->vlans[vid] << MV_HEADER_PORTS_S) & MV_HEADER_PORTS_M)
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);
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#else
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/* append the tag */
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*((__be32 *) buf) = cpu_to_be32((
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(MV_TRAILER_OVERRIDE << MV_TRAILER_FLAGS_S) |
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((priv->vlans[vid] & MV_TRAILER_PORTS_M) << MV_TRAILER_PORTS_S)
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));
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#endif
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return skb;
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error_expand:
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if (net_ratelimit())
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printk("%s: failed to expand/update skb for the switch\n", dev->name);
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error:
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/* any errors? drop the packet! */
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dev_kfree_skb_any(skb);
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return NULL;
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}
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static void
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mvswitch_mangle_rx(struct net_device *dev, struct sk_buff *skb)
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{
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struct mvswitch_priv *priv;
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unsigned char *buf;
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int vlan = -1;
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int i;
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priv = dev->phy_ptr;
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if (WARN_ON_ONCE(!priv))
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return;
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#ifdef HEADER_MODE
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buf = skb->data;
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skb_pull(skb, MV_HEADER_SIZE);
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#else
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buf = skb->data + skb->len - MV_TRAILER_SIZE;
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if (buf[0] != 0x80)
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return;
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#endif
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/* look for the vlan matching the incoming port */
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for (i = 0; i < ARRAY_SIZE(priv->vlans); i++) {
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if ((1 << buf[1]) & priv->vlans[i])
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vlan = i;
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}
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if (vlan == -1)
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return;
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__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan);
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}
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static int
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mvswitch_wait_mask(struct phy_device *pdev, int addr, int reg, u16 mask, u16 val)
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{
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int i = 100;
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u16 r;
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do {
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r = r16(pdev, addr, reg) & mask;
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if (r == val)
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return 0;
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} while(--i > 0);
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return -ETIMEDOUT;
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}
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static int
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mvswitch_config_init(struct phy_device *pdev)
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{
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struct mvswitch_priv *priv = to_mvsw(pdev);
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struct net_device *dev = pdev->attached_dev;
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u8 vlmap = 0;
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int i;
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if (!dev)
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return -EINVAL;
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printk("%s: Marvell 88E6060 PHY driver attached.\n", dev->name);
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linkmode_zero(pdev->supported);
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linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, pdev->supported);
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linkmode_copy(pdev->advertising, pdev->supported);
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dev->phy_ptr = priv;
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pdev->irq = PHY_POLL;
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#ifdef HEADER_MODE
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dev->flags |= IFF_PROMISC;
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#endif
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/* initialize default vlans */
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for (i = 0; i < MV_PORTS; i++)
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priv->vlans[(i == MV_WANPORT ? 2 : 1)] |= (1 << i);
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/* before entering reset, disable all ports */
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for (i = 0; i < MV_PORTS; i++)
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w16(pdev, MV_PORTREG(CONTROL, i), 0x00);
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msleep(2); /* wait for the status change to settle in */
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/* put the ATU in reset */
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w16(pdev, MV_SWITCHREG(ATU_CTRL), MV_ATUCTL_RESET);
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i = mvswitch_wait_mask(pdev, MV_SWITCHREG(ATU_CTRL), MV_ATUCTL_RESET, 0);
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if (i < 0) {
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printk("%s: Timeout waiting for the switch to reset.\n", dev->name);
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return i;
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}
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/* set the ATU flags */
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w16(pdev, MV_SWITCHREG(ATU_CTRL),
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MV_ATUCTL_NO_LEARN |
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MV_ATUCTL_ATU_1K |
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MV_ATUCTL_AGETIME(MV_ATUCTL_AGETIME_MIN) /* minimum without disabling ageing */
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);
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/* initialize the cpu port */
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w16(pdev, MV_PORTREG(CONTROL, MV_CPUPORT),
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#ifdef HEADER_MODE
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MV_PORTCTRL_HEADER |
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#else
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MV_PORTCTRL_RXTR |
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MV_PORTCTRL_TXTR |
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#endif
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MV_PORTCTRL_ENABLED
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);
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/* wait for the phy change to settle in */
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msleep(2);
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for (i = 0; i < MV_PORTS; i++) {
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u8 pvid = 0;
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int j;
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vlmap = 0;
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/* look for the matching vlan */
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for (j = 0; j < ARRAY_SIZE(priv->vlans); j++) {
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if (priv->vlans[j] & (1 << i)) {
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vlmap = priv->vlans[j];
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pvid = j;
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}
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}
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/* leave port unconfigured if it's not part of a vlan */
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if (!vlmap)
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continue;
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/* add the cpu port to the allowed destinations list */
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vlmap |= (1 << MV_CPUPORT);
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/* take port out of its own vlan destination map */
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vlmap &= ~(1 << i);
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/* apply vlan settings */
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w16(pdev, MV_PORTREG(VLANMAP, i),
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MV_PORTVLAN_PORTS(vlmap) |
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MV_PORTVLAN_ID(i)
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);
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/* re-enable port */
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w16(pdev, MV_PORTREG(CONTROL, i),
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MV_PORTCTRL_ENABLED
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);
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}
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w16(pdev, MV_PORTREG(VLANMAP, MV_CPUPORT),
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MV_PORTVLAN_ID(MV_CPUPORT)
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);
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/* set the port association vector */
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for (i = 0; i <= MV_PORTS; i++) {
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w16(pdev, MV_PORTREG(ASSOC, i),
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MV_PORTASSOC_PORTS(1 << i)
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);
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}
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/* init switch control */
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w16(pdev, MV_SWITCHREG(CTRL),
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MV_SWITCHCTL_MSIZE |
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MV_SWITCHCTL_DROP
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);
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dev->eth_mangle_rx = mvswitch_mangle_rx;
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dev->eth_mangle_tx = mvswitch_mangle_tx;
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priv->orig_features = dev->features;
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#ifdef HEADER_MODE
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dev->priv_flags |= IFF_NO_IP_ALIGN;
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dev->features |= NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_CTAG_TX;
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#else
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dev->features |= NETIF_F_HW_VLAN_CTAG_RX;
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#endif
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return 0;
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}
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static int
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mvswitch_read_status(struct phy_device *pdev)
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{
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pdev->speed = SPEED_100;
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pdev->duplex = DUPLEX_FULL;
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pdev->link = 1;
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/* XXX ugly workaround: we can't force the switch
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* to gracefully handle hosts moving from one port to another,
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* so we have to regularly clear the ATU database */
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/* wait for the ATU to become available */
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mvswitch_wait_mask(pdev, MV_SWITCHREG(ATU_OP), MV_ATUOP_INPROGRESS, 0);
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/* flush the ATU */
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w16(pdev, MV_SWITCHREG(ATU_OP),
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MV_ATUOP_INPROGRESS |
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MV_ATUOP_FLUSH_ALL
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);
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/* wait for operation to complete */
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mvswitch_wait_mask(pdev, MV_SWITCHREG(ATU_OP), MV_ATUOP_INPROGRESS, 0);
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return 0;
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}
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static int
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mvswitch_aneg_done(struct phy_device *phydev)
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{
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return 1; /* Return any positive value */
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}
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static int
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mvswitch_config_aneg(struct phy_device *phydev)
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{
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return 0;
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}
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static void
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mvswitch_detach(struct phy_device *pdev)
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{
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struct mvswitch_priv *priv = to_mvsw(pdev);
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struct net_device *dev = pdev->attached_dev;
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if (!dev)
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return;
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dev->phy_ptr = NULL;
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dev->eth_mangle_rx = NULL;
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dev->eth_mangle_tx = NULL;
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dev->features = priv->orig_features;
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dev->priv_flags &= ~IFF_NO_IP_ALIGN;
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}
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static void
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mvswitch_remove(struct phy_device *pdev)
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{
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struct mvswitch_priv *priv = to_mvsw(pdev);
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kfree(priv);
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}
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static int
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mvswitch_probe(struct phy_device *pdev)
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{
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struct mvswitch_priv *priv;
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priv = kzalloc(sizeof(struct mvswitch_priv), GFP_KERNEL);
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if (priv == NULL)
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return -ENOMEM;
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pdev->priv = priv;
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return 0;
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}
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static int
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mvswitch_fixup(struct phy_device *dev)
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{
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struct mii_bus *bus = dev->mdio.bus;
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u16 reg;
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if (dev->mdio.addr != 0x10)
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return 0;
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reg = bus->read(bus, MV_PORTREG(IDENT, 0)) & MV_IDENT_MASK;
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if (reg != MV_IDENT_VALUE)
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return 0;
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dev->phy_id = MVSWITCH_MAGIC;
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return 0;
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}
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static struct phy_driver mvswitch_driver = {
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.name = "Marvell 88E6060",
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.phy_id = MVSWITCH_MAGIC,
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.phy_id_mask = 0xffffffff,
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.features = PHY_BASIC_FEATURES,
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.probe = &mvswitch_probe,
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.remove = &mvswitch_remove,
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.detach = &mvswitch_detach,
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.config_init = &mvswitch_config_init,
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.config_aneg = &mvswitch_config_aneg,
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.aneg_done = &mvswitch_aneg_done,
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.read_status = &mvswitch_read_status,
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};
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static int __init
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mvswitch_init(void)
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{
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phy_register_fixup_for_id(PHY_ANY_ID, mvswitch_fixup);
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return phy_driver_register(&mvswitch_driver, THIS_MODULE);
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}
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static void __exit
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mvswitch_exit(void)
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{
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phy_driver_unregister(&mvswitch_driver);
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}
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module_init(mvswitch_init);
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module_exit(mvswitch_exit);
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