503 lines
14 KiB
C
503 lines
14 KiB
C
/*
|
|
* ADM5120 built in ethernet switch driver
|
|
*
|
|
* Copyright Jeroen Vreeken (pe1rxq@amsat.org), 2005
|
|
*
|
|
* Inspiration for this driver came from the original ADMtek 2.4
|
|
* driver, Copyright ADMtek Inc.
|
|
*/
|
|
#include <linux/autoconf.h>
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/etherdevice.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/ioport.h>
|
|
#include <asm/mipsregs.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/io.h>
|
|
#include "adm5120sw.h"
|
|
|
|
MODULE_AUTHOR("Jeroen Vreeken (pe1rxq@amsat.org)");
|
|
MODULE_DESCRIPTION("ADM5120 ethernet switch driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
/*
|
|
* The ADM5120 uses an internal matrix to determine which ports
|
|
* belong to which VLAN.
|
|
* The default generates a VLAN (and device) for each port
|
|
* (including MII port) and the CPU port is part of all of them.
|
|
*
|
|
* Another example, one big switch and everything mapped to eth0:
|
|
* 0x7f, 0x00, 0x00, 0x00, 0x00, 0x00
|
|
*/
|
|
static unsigned char vlan_matrix[SW_DEVS] = {
|
|
0x41, 0x42, 0x44, 0x48, 0x50, 0x60
|
|
};
|
|
|
|
static int adm5120_nrdevs;
|
|
|
|
static struct net_device *adm5120_devs[SW_DEVS];
|
|
static struct adm5120_dma
|
|
adm5120_dma_txh_v[ADM5120_DMA_TXH] __attribute__((aligned(16))),
|
|
adm5120_dma_txl_v[ADM5120_DMA_TXL] __attribute__((aligned(16))),
|
|
adm5120_dma_rxh_v[ADM5120_DMA_RXH] __attribute__((aligned(16))),
|
|
adm5120_dma_rxl_v[ADM5120_DMA_RXL] __attribute__((aligned(16))),
|
|
*adm5120_dma_txh,
|
|
*adm5120_dma_txl,
|
|
*adm5120_dma_rxh,
|
|
*adm5120_dma_rxl;
|
|
static struct sk_buff
|
|
*adm5120_skb_rxh[ADM5120_DMA_RXH],
|
|
*adm5120_skb_rxl[ADM5120_DMA_RXL],
|
|
*adm5120_skb_txh[ADM5120_DMA_TXH],
|
|
*adm5120_skb_txl[ADM5120_DMA_TXL];
|
|
static int adm5120_rxhi = 0;
|
|
static int adm5120_rxli = 0;
|
|
/* We don't use high priority tx for now */
|
|
/*static int adm5120_txhi = 0;*/
|
|
static int adm5120_txli = 0;
|
|
static int adm5120_txhit = 0;
|
|
static int adm5120_txlit = 0;
|
|
static int adm5120_if_open = 0;
|
|
|
|
static inline void adm5120_set_reg(unsigned int reg, unsigned long val)
|
|
{
|
|
*(volatile unsigned long*)(SW_BASE+reg) = val;
|
|
}
|
|
|
|
static inline unsigned long adm5120_get_reg(unsigned int reg)
|
|
{
|
|
return *(volatile unsigned long*)(SW_BASE+reg);
|
|
}
|
|
|
|
static inline void adm5120_rxfixup(struct adm5120_dma *dma,
|
|
struct sk_buff **skbl, int num)
|
|
{
|
|
int i;
|
|
|
|
/* Resubmit the entire ring */
|
|
for (i=0; i<num; i++) {
|
|
dma[i].status = 0;
|
|
dma[i].cntl = 0;
|
|
dma[i].len = ADM5120_DMA_RXSIZE;
|
|
dma[i].data = ADM5120_DMA_ADDR(skbl[i]->data) |
|
|
ADM5120_DMA_OWN | (i==num-1 ? ADM5120_DMA_RINGEND : 0);
|
|
}
|
|
}
|
|
|
|
static inline void adm5120_rx(struct adm5120_dma *dma, struct sk_buff **skbl,
|
|
int *index, int num)
|
|
{
|
|
struct sk_buff *skb, *skbn;
|
|
struct adm5120_sw *priv;
|
|
struct net_device *dev;
|
|
int port, vlan, len;
|
|
|
|
while (!(dma[*index].data & ADM5120_DMA_OWN)) {
|
|
port = (dma[*index].status & ADM5120_DMA_PORTID);
|
|
port >>= ADM5120_DMA_PORTSHIFT;
|
|
for (vlan = 0; vlan < adm5120_nrdevs; vlan++) {
|
|
if ((1<<port) & vlan_matrix[vlan])
|
|
break;
|
|
}
|
|
if (vlan == adm5120_nrdevs)
|
|
vlan = 0;
|
|
dev = adm5120_devs[vlan];
|
|
skb = skbl[*index];
|
|
len = (dma[*index].status & ADM5120_DMA_LEN);
|
|
len >>= ADM5120_DMA_LENSHIFT;
|
|
len -= ETH_FCS;
|
|
|
|
priv = netdev_priv(dev);
|
|
if (len <= 0 || len > ADM5120_DMA_RXSIZE ||
|
|
dma[*index].status & ADM5120_DMA_FCSERR) {
|
|
priv->stats.rx_errors++;
|
|
skbn = NULL;
|
|
} else {
|
|
skbn = dev_alloc_skb(ADM5120_DMA_RXSIZE+16);
|
|
if (skbn) {
|
|
skb_put(skb, len);
|
|
skb->dev = dev;
|
|
skb->protocol = eth_type_trans(skb, dev);
|
|
skb->ip_summed = CHECKSUM_UNNECESSARY;
|
|
dev->last_rx = jiffies;
|
|
priv->stats.rx_packets++;
|
|
priv->stats.rx_bytes+=len;
|
|
skb_reserve(skbn, 2);
|
|
skbl[*index] = skbn;
|
|
} else {
|
|
printk(KERN_INFO "%s recycling!\n", dev->name);
|
|
}
|
|
}
|
|
|
|
dma[*index].status = 0;
|
|
dma[*index].cntl = 0;
|
|
dma[*index].len = ADM5120_DMA_RXSIZE;
|
|
dma[*index].data = ADM5120_DMA_ADDR(skbl[*index]->data) |
|
|
ADM5120_DMA_OWN |
|
|
(num-1==*index ? ADM5120_DMA_RINGEND : 0);
|
|
if (num == ++*index)
|
|
*index = 0;
|
|
if (skbn)
|
|
netif_rx(skb);
|
|
}
|
|
}
|
|
|
|
static inline void adm5120_tx(struct adm5120_dma *dma, struct sk_buff **skbl,
|
|
int *index, int num)
|
|
{
|
|
while((dma[*index].data & ADM5120_DMA_OWN) == 0 && skbl[*index]) {
|
|
dev_kfree_skb_irq(skbl[*index]);
|
|
skbl[*index] = NULL;
|
|
if (++*index == num)
|
|
*index = 0;
|
|
}
|
|
}
|
|
|
|
irqreturn_t adm5120_sw_irq(int irq, void *dev_id, struct pt_regs *regs)
|
|
{
|
|
unsigned long intreg;
|
|
|
|
adm5120_set_reg(ADM5120_INT_MASK,
|
|
adm5120_get_reg(ADM5120_INT_MASK) | ADM5120_INTHANDLE);
|
|
|
|
intreg = adm5120_get_reg(ADM5120_INT_ST);
|
|
adm5120_set_reg(ADM5120_INT_ST, intreg);
|
|
|
|
if (intreg & ADM5120_INT_RXH)
|
|
adm5120_rx(adm5120_dma_rxh, adm5120_skb_rxh, &adm5120_rxhi,
|
|
ADM5120_DMA_RXH);
|
|
if (intreg & ADM5120_INT_HFULL)
|
|
adm5120_rxfixup(adm5120_dma_rxh, adm5120_skb_rxh,
|
|
ADM5120_DMA_RXH);
|
|
if (intreg & ADM5120_INT_RXL)
|
|
adm5120_rx(adm5120_dma_rxl, adm5120_skb_rxl, &adm5120_rxli,
|
|
ADM5120_DMA_RXL);
|
|
if (intreg & ADM5120_INT_LFULL)
|
|
adm5120_rxfixup(adm5120_dma_rxl, adm5120_skb_rxl,
|
|
ADM5120_DMA_RXL);
|
|
if (intreg & ADM5120_INT_TXH)
|
|
adm5120_tx(adm5120_dma_txh, adm5120_skb_txh, &adm5120_txhit,
|
|
ADM5120_DMA_TXH);
|
|
if (intreg & ADM5120_INT_TXL)
|
|
adm5120_tx(adm5120_dma_txl, adm5120_skb_txl, &adm5120_txlit,
|
|
ADM5120_DMA_TXL);
|
|
|
|
adm5120_set_reg(ADM5120_INT_MASK,
|
|
adm5120_get_reg(ADM5120_INT_MASK) & ~ADM5120_INTHANDLE);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static void adm5120_set_vlan(char *matrix)
|
|
{
|
|
unsigned long val;
|
|
|
|
val = matrix[0] + (matrix[1]<<8) + (matrix[2]<<16) + (matrix[3]<<24);
|
|
adm5120_set_reg(ADM5120_VLAN_GI, val);
|
|
val = matrix[4] + (matrix[5]<<8);
|
|
adm5120_set_reg(ADM5120_VLAN_GII, val);
|
|
}
|
|
|
|
static int adm5120_sw_open(struct net_device *dev)
|
|
{
|
|
if (!adm5120_if_open++)
|
|
adm5120_set_reg(ADM5120_INT_MASK,
|
|
adm5120_get_reg(ADM5120_INT_MASK) & ~ADM5120_INTHANDLE);
|
|
netif_start_queue(dev);
|
|
return 0;
|
|
}
|
|
|
|
static int adm5120_sw_stop(struct net_device *dev)
|
|
{
|
|
netif_stop_queue(dev);
|
|
if (!--adm5120_if_open)
|
|
adm5120_set_reg(ADM5120_INT_MASK,
|
|
adm5120_get_reg(ADM5120_INT_MASK) | ADM5120_INTMASKALL);
|
|
return 0;
|
|
}
|
|
|
|
static int adm5120_sw_tx(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct adm5120_dma *dma = adm5120_dma_txl;
|
|
struct sk_buff **skbl = adm5120_skb_txl;
|
|
struct adm5120_sw *priv = netdev_priv(dev);
|
|
int *index = &adm5120_txli;
|
|
int num = ADM5120_DMA_TXL;
|
|
int trigger = ADM5120_SEND_TRIG_L;
|
|
|
|
dev->trans_start = jiffies;
|
|
if (dma[*index].data & ADM5120_DMA_OWN) {
|
|
dev_kfree_skb(skb);
|
|
priv->stats.tx_dropped++;
|
|
return 0;
|
|
}
|
|
|
|
dma[*index].data = ADM5120_DMA_ADDR(skb->data) | ADM5120_DMA_OWN;
|
|
if (*index == num-1)
|
|
dma[*index].data |= ADM5120_DMA_RINGEND;
|
|
dma[*index].status =
|
|
((skb->len<ETH_ZLEN?ETH_ZLEN:skb->len) << ADM5120_DMA_LENSHIFT) |
|
|
(0x1 << priv->port);
|
|
dma[*index].len = skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len;
|
|
priv->stats.tx_packets++;
|
|
priv->stats.tx_bytes += skb->len;
|
|
skbl[*index]=skb;
|
|
|
|
if (++*index == num)
|
|
*index = 0;
|
|
adm5120_set_reg(ADM5120_SEND_TRIG, trigger);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void adm5120_tx_timeout(struct net_device *dev)
|
|
{
|
|
netif_wake_queue(dev);
|
|
}
|
|
|
|
static struct net_device_stats *adm5120_sw_stats(struct net_device *dev)
|
|
{
|
|
return &((struct adm5120_sw *)netdev_priv(dev))->stats;
|
|
}
|
|
|
|
static void adm5120_set_multicast_list(struct net_device *dev)
|
|
{
|
|
struct adm5120_sw *priv = netdev_priv(dev);
|
|
int portmask;
|
|
|
|
portmask = vlan_matrix[priv->port] & 0x3f;
|
|
|
|
if (dev->flags & IFF_PROMISC)
|
|
adm5120_set_reg(ADM5120_CPUP_CONF,
|
|
adm5120_get_reg(ADM5120_CPUP_CONF) &
|
|
~((portmask << ADM5120_DISUNSHIFT) & ADM5120_DISUNALL));
|
|
else
|
|
adm5120_set_reg(ADM5120_CPUP_CONF,
|
|
adm5120_get_reg(ADM5120_CPUP_CONF) |
|
|
(portmask << ADM5120_DISUNSHIFT));
|
|
|
|
if (dev->flags & IFF_PROMISC || dev->flags & IFF_ALLMULTI ||
|
|
dev->mc_count)
|
|
adm5120_set_reg(ADM5120_CPUP_CONF,
|
|
adm5120_get_reg(ADM5120_CPUP_CONF) &
|
|
~((portmask << ADM5120_DISMCSHIFT) & ADM5120_DISMCALL));
|
|
else
|
|
adm5120_set_reg(ADM5120_CPUP_CONF,
|
|
adm5120_get_reg(ADM5120_CPUP_CONF) |
|
|
(portmask << ADM5120_DISMCSHIFT));
|
|
}
|
|
|
|
static void adm5120_write_mac(struct net_device *dev)
|
|
{
|
|
struct adm5120_sw *priv = netdev_priv(dev);
|
|
unsigned char *mac = dev->dev_addr;
|
|
|
|
adm5120_set_reg(ADM5120_MAC_WT1,
|
|
mac[2] | (mac[3]<<8) | (mac[4]<<16) | (mac[5]<<24));
|
|
adm5120_set_reg(ADM5120_MAC_WT0, (priv->port<<3) |
|
|
(mac[0]<<16) | (mac[1]<<24) | ADM5120_MAC_WRITE | ADM5120_VLAN_EN);
|
|
|
|
while (!(adm5120_get_reg(ADM5120_MAC_WT0) & ADM5120_MAC_WRITE_DONE));
|
|
}
|
|
|
|
static int adm5120_sw_set_mac_address(struct net_device *dev, void *p)
|
|
{
|
|
struct sockaddr *addr = p;
|
|
|
|
memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);
|
|
adm5120_write_mac(dev);
|
|
return 0;
|
|
}
|
|
|
|
static int adm5120_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
|
|
{
|
|
int err;
|
|
struct adm5120_info info;
|
|
struct adm5120_sw *priv = netdev_priv(dev);
|
|
|
|
switch(cmd) {
|
|
case SIOCGADMINFO:
|
|
info.magic = 0x5120;
|
|
info.ports = adm5120_nrdevs;
|
|
info.vlan = priv->port;
|
|
err = copy_to_user(rq->ifr_data, &info, sizeof(info));
|
|
if (err)
|
|
return -EFAULT;
|
|
break;
|
|
case SIOCSMATRIX:
|
|
if (!capable(CAP_NET_ADMIN))
|
|
return -EPERM;
|
|
err = copy_from_user(vlan_matrix, rq->ifr_data,
|
|
sizeof(vlan_matrix));
|
|
if (err)
|
|
return -EFAULT;
|
|
adm5120_set_vlan(vlan_matrix);
|
|
break;
|
|
case SIOCGMATRIX:
|
|
err = copy_to_user(rq->ifr_data, vlan_matrix,
|
|
sizeof(vlan_matrix));
|
|
if (err)
|
|
return -EFAULT;
|
|
break;
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void adm5120_dma_tx_init(struct adm5120_dma *dma, struct sk_buff **skb,
|
|
int num)
|
|
{
|
|
memset(dma, 0, sizeof(struct adm5120_dma)*num);
|
|
dma[num-1].data |= ADM5120_DMA_RINGEND;
|
|
memset(skb, 0, sizeof(struct skb*)*num);
|
|
}
|
|
|
|
static void adm5120_dma_rx_init(struct adm5120_dma *dma, struct sk_buff **skb,
|
|
int num)
|
|
{
|
|
int i;
|
|
|
|
memset(dma, 0, sizeof(struct adm5120_dma)*num);
|
|
for (i=0; i<num; i++) {
|
|
skb[i] = dev_alloc_skb(ADM5120_DMA_RXSIZE+16);
|
|
if (!skb[i]) {
|
|
i=num;
|
|
break;
|
|
}
|
|
skb_reserve(skb[i], 2);
|
|
dma[i].data = ADM5120_DMA_ADDR(skb[i]->data) | ADM5120_DMA_OWN;
|
|
dma[i].cntl = 0;
|
|
dma[i].len = ADM5120_DMA_RXSIZE;
|
|
dma[i].status = 0;
|
|
}
|
|
dma[i-1].data |= ADM5120_DMA_RINGEND;
|
|
}
|
|
|
|
static int __init adm5120_sw_init(void)
|
|
{
|
|
int i, err;
|
|
struct net_device *dev;
|
|
|
|
err = request_irq(SW_IRQ, adm5120_sw_irq, 0, "ethernet switch", NULL);
|
|
if (err)
|
|
goto out;
|
|
|
|
/* MII port? */
|
|
if (adm5120_get_reg(ADM5120_CODE) & ADM5120_CODE_PQFP)
|
|
adm5120_nrdevs = 5;
|
|
else
|
|
adm5120_nrdevs = 6;
|
|
|
|
adm5120_set_reg(ADM5120_CPUP_CONF,
|
|
ADM5120_DISCCPUPORT | ADM5120_CRC_PADDING |
|
|
ADM5120_DISUNALL | ADM5120_DISMCALL);
|
|
adm5120_set_reg(ADM5120_PORT_CONF0, ADM5120_ENMC | ADM5120_ENBP);
|
|
|
|
adm5120_set_reg(ADM5120_PHY_CNTL2, adm5120_get_reg(ADM5120_PHY_CNTL2) |
|
|
ADM5120_AUTONEG | ADM5120_NORMAL | ADM5120_AUTOMDIX);
|
|
adm5120_set_reg(ADM5120_PHY_CNTL3, adm5120_get_reg(ADM5120_PHY_CNTL3) |
|
|
ADM5120_PHY_NTH);
|
|
|
|
adm5120_set_reg(ADM5120_INT_MASK, ADM5120_INTMASKALL);
|
|
adm5120_set_reg(ADM5120_INT_ST, ADM5120_INTMASKALL);
|
|
|
|
adm5120_dma_txh = (void *)KSEG1ADDR((u32)adm5120_dma_txh_v);
|
|
adm5120_dma_txl = (void *)KSEG1ADDR((u32)adm5120_dma_txl_v);
|
|
adm5120_dma_rxh = (void *)KSEG1ADDR((u32)adm5120_dma_rxh_v);
|
|
adm5120_dma_rxl = (void *)KSEG1ADDR((u32)adm5120_dma_rxl_v);
|
|
|
|
adm5120_dma_tx_init(adm5120_dma_txh, adm5120_skb_txh, ADM5120_DMA_TXH);
|
|
adm5120_dma_tx_init(adm5120_dma_txl, adm5120_skb_txl, ADM5120_DMA_TXL);
|
|
adm5120_dma_rx_init(adm5120_dma_rxh, adm5120_skb_rxh, ADM5120_DMA_RXH);
|
|
adm5120_dma_rx_init(adm5120_dma_rxl, adm5120_skb_rxl, ADM5120_DMA_RXL);
|
|
adm5120_set_reg(ADM5120_SEND_HBADDR, KSEG1ADDR(adm5120_dma_txh));
|
|
adm5120_set_reg(ADM5120_SEND_LBADDR, KSEG1ADDR(adm5120_dma_txl));
|
|
adm5120_set_reg(ADM5120_RECEIVE_HBADDR, KSEG1ADDR(adm5120_dma_rxh));
|
|
adm5120_set_reg(ADM5120_RECEIVE_LBADDR, KSEG1ADDR(adm5120_dma_rxl));
|
|
|
|
adm5120_set_vlan(vlan_matrix);
|
|
|
|
for (i=0; i<adm5120_nrdevs; i++) {
|
|
adm5120_devs[i] = alloc_etherdev(sizeof(struct adm5120_sw));
|
|
if (!adm5120_devs[i]) {
|
|
err = -ENOMEM;
|
|
goto out_int;
|
|
}
|
|
|
|
dev = adm5120_devs[i];
|
|
SET_MODULE_OWNER(dev);
|
|
memset(netdev_priv(dev), 0, sizeof(struct adm5120_sw));
|
|
((struct adm5120_sw*)netdev_priv(dev))->port = i;
|
|
dev->base_addr = SW_BASE;
|
|
dev->irq = SW_IRQ;
|
|
dev->open = adm5120_sw_open;
|
|
dev->hard_start_xmit = adm5120_sw_tx;
|
|
dev->stop = adm5120_sw_stop;
|
|
dev->get_stats = adm5120_sw_stats;
|
|
dev->set_multicast_list = adm5120_set_multicast_list;
|
|
dev->do_ioctl = adm5120_do_ioctl;
|
|
dev->tx_timeout = adm5120_tx_timeout;
|
|
dev->watchdog_timeo = ETH_TX_TIMEOUT;
|
|
dev->set_mac_address = adm5120_sw_set_mac_address;
|
|
/* HACK alert!!! In the original admtek driver it is asumed
|
|
that you can read the MAC addressess from flash, but edimax
|
|
decided to leave that space intentionally blank...
|
|
*/
|
|
memcpy(dev->dev_addr, "\x00\x50\xfc\x11\x22\x01", 6);
|
|
dev->dev_addr[5] += i;
|
|
adm5120_write_mac(dev);
|
|
|
|
if ((err = register_netdev(dev))) {
|
|
free_netdev(dev);
|
|
goto out_int;
|
|
}
|
|
printk(KERN_INFO "%s: ADM5120 switch port%d\n", dev->name, i);
|
|
}
|
|
adm5120_set_reg(ADM5120_CPUP_CONF,
|
|
ADM5120_CRC_PADDING | ADM5120_DISUNALL | ADM5120_DISMCALL);
|
|
|
|
return 0;
|
|
|
|
out_int:
|
|
/* Undo everything that did succeed */
|
|
for (; i; i--) {
|
|
unregister_netdev(adm5120_devs[i-1]);
|
|
free_netdev(adm5120_devs[i-1]);
|
|
}
|
|
free_irq(SW_IRQ, NULL);
|
|
out:
|
|
printk(KERN_ERR "ADM5120 Ethernet switch init failed\n");
|
|
return err;
|
|
}
|
|
|
|
static void __exit adm5120_sw_exit(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < adm5120_nrdevs; i++) {
|
|
unregister_netdev(adm5120_devs[i]);
|
|
free_netdev(adm5120_devs[i-1]);
|
|
}
|
|
|
|
free_irq(SW_IRQ, NULL);
|
|
|
|
for (i = 0; i < ADM5120_DMA_RXH; i++) {
|
|
if (!adm5120_skb_rxh[i])
|
|
break;
|
|
kfree_skb(adm5120_skb_rxh[i]);
|
|
}
|
|
for (i = 0; i < ADM5120_DMA_RXL; i++) {
|
|
if (!adm5120_skb_rxl[i])
|
|
break;
|
|
kfree_skb(adm5120_skb_rxl[i]);
|
|
}
|
|
}
|
|
|
|
module_init(adm5120_sw_init);
|
|
module_exit(adm5120_sw_exit);
|