+++ /dev/null
-/*
- * 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"
-
-#include <asm/mach-adm5120/adm5120_info.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;
- }
-}
-
-static irqreturn_t adm5120_sw_irq(int irq, void *dev_id)
-{
- 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_sw_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;
-
- adm5120_nrdevs = adm5120_board.iface_num;
- if (adm5120_nrdevs > 5 && !adm5120_has_gmii())
- adm5120_nrdevs = 5;
-
- 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);
projects / openwrt / svn-archive / openwrt.git / blobdiff