--- /dev/null
+/*
+ * Fast Ethernet Controller (FEC) driver for Motorola MPC8xx.
+ *
+ * Copyright (c) 2003 Intracom S.A.
+ * by Pantelis Antoniou <panto@intracom.gr>
+ *
+ * Heavily based on original FEC driver by Dan Malek <dan@embeddededge.com>
+ * and modifications by Joakim Tjernlund <joakim.tjernlund@lumentis.se>
+ *
+ * Released under the GPL
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/ptrace.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/pci.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/mii.h>
+#include <linux/ethtool.h>
+
+#include <asm/8xx_immap.h>
+#include <asm/pgtable.h>
+#include <asm/mpc8xx.h>
+#include <asm/irq.h>
+#include <asm/bitops.h>
+#include <asm/uaccess.h>
+#include <asm/commproc.h>
+#include <asm/dma-mapping.h>
+
+#include "fec_8xx.h"
+
+/*************************************************/
+
+#define FEC_MAX_MULTICAST_ADDRS 64
+
+/*************************************************/
+
+static char version[] __devinitdata =
+ DRV_MODULE_NAME ".c:v" DRV_MODULE_VERSION " (" DRV_MODULE_RELDATE ")" "\n";
+
+MODULE_AUTHOR("Pantelis Antoniou <panto@intracom.gr>");
+MODULE_DESCRIPTION("Motorola 8xx FEC ethernet driver");
+MODULE_LICENSE("GPL");
+
+MODULE_PARM(fec_8xx_debug, "i");
+MODULE_PARM_DESC(fec_8xx_debug,
+ "FEC 8xx bitmapped debugging message enable value");
+
+int fec_8xx_debug = -1; /* -1 == use FEC_8XX_DEF_MSG_ENABLE as value */
+
+/*************************************************/
+
+/*
+ * Delay to wait for FEC reset command to complete (in us)
+ */
+#define FEC_RESET_DELAY 50
+
+/*****************************************************************************************/
+
+static void fec_whack_reset(fec_t * fecp)
+{
+ int i;
+
+ /*
+ * Whack a reset. We should wait for this.
+ */
+ FW(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_RESET);
+ for (i = 0;
+ (FR(fecp, ecntrl) & FEC_ECNTRL_RESET) != 0 && i < FEC_RESET_DELAY;
+ i++)
+ udelay(1);
+
+ if (i == FEC_RESET_DELAY)
+ printk(KERN_WARNING "FEC Reset timeout!\n");
+
+}
+
+/****************************************************************************/
+
+/*
+ * Transmitter timeout.
+ */
+#define TX_TIMEOUT (2*HZ)
+
+/****************************************************************************/
+
+/*
+ * Returns the CRC needed when filling in the hash table for
+ * multicast group filtering
+ * pAddr must point to a MAC address (6 bytes)
+ */
+static __u32 fec_mulicast_calc_crc(char *pAddr)
+{
+ u8 byte;
+ int byte_count;
+ int bit_count;
+ __u32 crc = 0xffffffff;
+ u8 msb;
+
+ for (byte_count = 0; byte_count < 6; byte_count++) {
+ byte = pAddr[byte_count];
+ for (bit_count = 0; bit_count < 8; bit_count++) {
+ msb = crc >> 31;
+ crc <<= 1;
+ if (msb ^ (byte & 0x1)) {
+ crc ^= FEC_CRC_POLY;
+ }
+ byte >>= 1;
+ }
+ }
+ return (crc);
+}
+
+/*
+ * Set or clear the multicast filter for this adaptor.
+ * Skeleton taken from sunlance driver.
+ * The CPM Ethernet implementation allows Multicast as well as individual
+ * MAC address filtering. Some of the drivers check to make sure it is
+ * a group multicast address, and discard those that are not. I guess I
+ * will do the same for now, but just remove the test if you want
+ * individual filtering as well (do the upper net layers want or support
+ * this kind of feature?).
+ */
+static void fec_set_multicast_list(struct net_device *dev)
+{
+ struct fec_enet_private *fep = netdev_priv(dev);
+ fec_t *fecp = fep->fecp;
+ struct dev_mc_list *pmc;
+ __u32 crc;
+ int temp;
+ __u32 csrVal;
+ int hash_index;
+ __u32 hthi, htlo;
+ unsigned long flags;
+
+
+ if ((dev->flags & IFF_PROMISC) != 0) {
+
+ spin_lock_irqsave(&fep->lock, flags);
+ FS(fecp, r_cntrl, FEC_RCNTRL_PROM);
+ spin_unlock_irqrestore(&fep->lock, flags);
+
+ /*
+ * Log any net taps.
+ */
+ printk(KERN_WARNING DRV_MODULE_NAME
+ ": %s: Promiscuous mode enabled.\n", dev->name);
+ return;
+
+ }
+
+ if ((dev->flags & IFF_ALLMULTI) != 0 ||
+ dev->mc_count > FEC_MAX_MULTICAST_ADDRS) {
+ /*
+ * Catch all multicast addresses, set the filter to all 1's.
+ */
+ hthi = 0xffffffffU;
+ htlo = 0xffffffffU;
+ } else {
+ hthi = 0;
+ htlo = 0;
+
+ /*
+ * Now populate the hash table
+ */
+ for (pmc = dev->mc_list; pmc != NULL; pmc = pmc->next) {
+ crc = fec_mulicast_calc_crc(pmc->dmi_addr);
+ temp = (crc & 0x3f) >> 1;
+ hash_index = ((temp & 0x01) << 4) |
+ ((temp & 0x02) << 2) |
+ ((temp & 0x04)) |
+ ((temp & 0x08) >> 2) |
+ ((temp & 0x10) >> 4);
+ csrVal = (1 << hash_index);
+ if (crc & 1)
+ hthi |= csrVal;
+ else
+ htlo |= csrVal;
+ }
+ }
+
+ spin_lock_irqsave(&fep->lock, flags);
+ FC(fecp, r_cntrl, FEC_RCNTRL_PROM);
+ FW(fecp, hash_table_high, hthi);
+ FW(fecp, hash_table_low, htlo);
+ spin_unlock_irqrestore(&fep->lock, flags);
+}
+
+static int fec_set_mac_address(struct net_device *dev, void *addr)
+{
+ struct sockaddr *mac = addr;
+ struct fec_enet_private *fep = netdev_priv(dev);
+ struct fec *fecp = fep->fecp;
+ int i;
+ __u32 addrhi, addrlo;
+ unsigned long flags;
+
+ /* Get pointer to SCC area in parameter RAM. */
+ for (i = 0; i < 6; i++)
+ dev->dev_addr[i] = mac->sa_data[i];
+
+ /*
+ * Set station address.
+ */
+ addrhi = ((__u32) dev->dev_addr[0] << 24) |
+ ((__u32) dev->dev_addr[1] << 16) |
+ ((__u32) dev->dev_addr[2] << 8) |
+ (__u32) dev->dev_addr[3];
+ addrlo = ((__u32) dev->dev_addr[4] << 24) |
+ ((__u32) dev->dev_addr[5] << 16);
+
+ spin_lock_irqsave(&fep->lock, flags);
+ FW(fecp, addr_low, addrhi);
+ FW(fecp, addr_high, addrlo);
+ spin_unlock_irqrestore(&fep->lock, flags);
+
+ return 0;
+}
+
+/*
+ * This function is called to start or restart the FEC during a link
+ * change. This only happens when switching between half and full
+ * duplex.
+ */
+void fec_restart(struct net_device *dev, int duplex, int speed)
+{
+#ifdef CONFIG_DUET
+ immap_t *immap = (immap_t *) IMAP_ADDR;
+ __u32 cptr;
+#endif
+ struct fec_enet_private *fep = netdev_priv(dev);
+ struct fec *fecp = fep->fecp;
+ const struct fec_platform_info *fpi = fep->fpi;
+ cbd_t *bdp;
+ struct sk_buff *skb;
+ int i;
+ __u32 addrhi, addrlo;
+
+ fec_whack_reset(fep->fecp);
+
+ /*
+ * Set station address.
+ */
+ addrhi = ((__u32) dev->dev_addr[0] << 24) |
+ ((__u32) dev->dev_addr[1] << 16) |
+ ((__u32) dev->dev_addr[2] << 8) |
+ (__u32) dev->dev_addr[3];
+ addrlo = ((__u32) dev->dev_addr[4] << 24) |
+ ((__u32) dev->dev_addr[5] << 16);
+ FW(fecp, addr_low, addrhi);
+ FW(fecp, addr_high, addrlo);
+
+ /*
+ * Reset all multicast.
+ */
+ FW(fecp, hash_table_high, 0);
+ FW(fecp, hash_table_low, 0);
+
+ /*
+ * Set maximum receive buffer size.
+ */
+ FW(fecp, r_buff_size, PKT_MAXBLR_SIZE);
+ FW(fecp, r_hash, PKT_MAXBUF_SIZE);
+
+ /*
+ * Set receive and transmit descriptor base.
+ */
+ FW(fecp, r_des_start, iopa((__u32) (fep->rx_bd_base)));
+ FW(fecp, x_des_start, iopa((__u32) (fep->tx_bd_base)));
+
+ fep->dirty_tx = fep->cur_tx = fep->tx_bd_base;
+ fep->tx_free = fep->tx_ring;
+ fep->cur_rx = fep->rx_bd_base;
+
+ /*
+ * Reset SKB receive buffers
+ */
+ for (i = 0; i < fep->rx_ring; i++) {
+ if ((skb = fep->rx_skbuff[i]) == NULL)
+ continue;
+ fep->rx_skbuff[i] = NULL;
+ dev_kfree_skb(skb);
+ }
+
+ /*
+ * Initialize the receive buffer descriptors.
+ */
+ for (i = 0, bdp = fep->rx_bd_base; i < fep->rx_ring; i++, bdp++) {
+ skb = dev_alloc_skb(ENET_RX_FRSIZE);
+ if (skb == NULL) {
+ printk(KERN_WARNING DRV_MODULE_NAME
+ ": %s Memory squeeze, unable to allocate skb\n",
+ dev->name);
+ fep->stats.rx_dropped++;
+ break;
+ }
+ fep->rx_skbuff[i] = skb;
+ skb->dev = dev;
+ CBDW_BUFADDR(bdp, dma_map_single(NULL, skb->data,
+ L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
+ DMA_FROM_DEVICE));
+ CBDW_DATLEN(bdp, 0); /* zero */
+ CBDW_SC(bdp, BD_ENET_RX_EMPTY |
+ ((i < fep->rx_ring - 1) ? 0 : BD_SC_WRAP));
+ }
+ /*
+ * if we failed, fillup remainder
+ */
+ for (; i < fep->rx_ring; i++, bdp++) {
+ fep->rx_skbuff[i] = NULL;
+ CBDW_SC(bdp, (i < fep->rx_ring - 1) ? 0 : BD_SC_WRAP);
+ }
+
+ /*
+ * Reset SKB transmit buffers.
+ */
+ for (i = 0; i < fep->tx_ring; i++) {
+ if ((skb = fep->tx_skbuff[i]) == NULL)
+ continue;
+ fep->tx_skbuff[i] = NULL;
+ dev_kfree_skb(skb);
+ }
+
+ /*
+ * ...and the same for transmit.
+ */
+ for (i = 0, bdp = fep->tx_bd_base; i < fep->tx_ring; i++, bdp++) {
+ fep->tx_skbuff[i] = NULL;
+ CBDW_BUFADDR(bdp, virt_to_bus(NULL));
+ CBDW_DATLEN(bdp, 0);
+ CBDW_SC(bdp, (i < fep->tx_ring - 1) ? 0 : BD_SC_WRAP);
+ }
+
+ /*
+ * Enable big endian and don't care about SDMA FC.
+ */
+ FW(fecp, fun_code, 0x78000000);
+
+ /*
+ * Set MII speed.
+ */
+ FW(fecp, mii_speed, fep->fec_phy_speed);
+
+ /*
+ * Clear any outstanding interrupt.
+ */
+ FW(fecp, ievent, 0xffc0);
+ FW(fecp, ivec, (fpi->fec_irq / 2) << 29);
+
+ /*
+ * adjust to speed (only for DUET & RMII)
+ */
+#ifdef CONFIG_DUET
+ cptr = in_be32(&immap->im_cpm.cp_cptr);
+ switch (fpi->fec_no) {
+ case 0:
+ /*
+ * check if in RMII mode
+ */
+ if ((cptr & 0x100) == 0)
+ break;
+
+ if (speed == 10)
+ cptr |= 0x0000010;
+ else if (speed == 100)
+ cptr &= ~0x0000010;
+ break;
+ case 1:
+ /*
+ * check if in RMII mode
+ */
+ if ((cptr & 0x80) == 0)
+ break;
+
+ if (speed == 10)
+ cptr |= 0x0000008;
+ else if (speed == 100)
+ cptr &= ~0x0000008;
+ break;
+ default:
+ break;
+ }
+ out_be32(&immap->im_cpm.cp_cptr, cptr);
+#endif
+
+ FW(fecp, r_cntrl, FEC_RCNTRL_MII_MODE); /* MII enable */
+ /*
+ * adjust to duplex mode
+ */
+ if (duplex) {
+ FC(fecp, r_cntrl, FEC_RCNTRL_DRT);
+ FS(fecp, x_cntrl, FEC_TCNTRL_FDEN); /* FD enable */
+ } else {
+ FS(fecp, r_cntrl, FEC_RCNTRL_DRT);
+ FC(fecp, x_cntrl, FEC_TCNTRL_FDEN); /* FD disable */
+ }
+
+ /*
+ * Enable interrupts we wish to service.
+ */
+ FW(fecp, imask, FEC_ENET_TXF | FEC_ENET_TXB |
+ FEC_ENET_RXF | FEC_ENET_RXB);
+
+ /*
+ * And last, enable the transmit and receive processing.
+ */
+ FW(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN);
+ FW(fecp, r_des_active, 0x01000000);
+}
+
+void fec_stop(struct net_device *dev)
+{
+ struct fec_enet_private *fep = netdev_priv(dev);
+ fec_t *fecp = fep->fecp;
+ struct sk_buff *skb;
+ int i;
+
+ if ((FR(fecp, ecntrl) & FEC_ECNTRL_ETHER_EN) == 0)
+ return; /* already down */
+
+ FW(fecp, x_cntrl, 0x01); /* Graceful transmit stop */
+ for (i = 0; ((FR(fecp, ievent) & 0x10000000) == 0) &&
+ i < FEC_RESET_DELAY; i++)
+ udelay(1);
+
+ if (i == FEC_RESET_DELAY)
+ printk(KERN_WARNING DRV_MODULE_NAME
+ ": %s FEC timeout on graceful transmit stop\n",
+ dev->name);
+ /*
+ * Disable FEC. Let only MII interrupts.
+ */
+ FW(fecp, imask, 0);
+ FW(fecp, ecntrl, ~FEC_ECNTRL_ETHER_EN);
+
+ /*
+ * Reset SKB transmit buffers.
+ */
+ for (i = 0; i < fep->tx_ring; i++) {
+ if ((skb = fep->tx_skbuff[i]) == NULL)
+ continue;
+ fep->tx_skbuff[i] = NULL;
+ dev_kfree_skb(skb);
+ }
+
+ /*
+ * Reset SKB receive buffers
+ */
+ for (i = 0; i < fep->rx_ring; i++) {
+ if ((skb = fep->rx_skbuff[i]) == NULL)
+ continue;
+ fep->rx_skbuff[i] = NULL;
+ dev_kfree_skb(skb);
+ }
+}
+
+/* common receive function */
+static int fec_enet_rx_common(struct net_device *dev, int *budget)
+{
+ struct fec_enet_private *fep = netdev_priv(dev);
+ fec_t *fecp = fep->fecp;
+ const struct fec_platform_info *fpi = fep->fpi;
+ cbd_t *bdp;
+ struct sk_buff *skb, *skbn, *skbt;
+ int received = 0;
+ __u16 pkt_len, sc;
+ int curidx;
+ int rx_work_limit;
+
+ if (fpi->use_napi) {
+ rx_work_limit = min(dev->quota, *budget);
+
+ if (!netif_running(dev))
+ return 0;
+ }
+
+ /*
+ * First, grab all of the stats for the incoming packet.
+ * These get messed up if we get called due to a busy condition.
+ */
+ bdp = fep->cur_rx;
+
+ /* clear RX status bits for napi*/
+ if (fpi->use_napi)
+ FW(fecp, ievent, FEC_ENET_RXF | FEC_ENET_RXB);
+
+ while (((sc = CBDR_SC(bdp)) & BD_ENET_RX_EMPTY) == 0) {
+
+ curidx = bdp - fep->rx_bd_base;
+
+ /*
+ * Since we have allocated space to hold a complete frame,
+ * the last indicator should be set.
+ */
+ if ((sc & BD_ENET_RX_LAST) == 0)
+ printk(KERN_WARNING DRV_MODULE_NAME
+ ": %s rcv is not +last\n",
+ dev->name);
+
+ /*
+ * Check for errors.
+ */
+ if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_CL |
+ BD_ENET_RX_NO | BD_ENET_RX_CR | BD_ENET_RX_OV)) {
+ fep->stats.rx_errors++;
+ /* Frame too long or too short. */
+ if (sc & (BD_ENET_RX_LG | BD_ENET_RX_SH))
+ fep->stats.rx_length_errors++;
+ /* Frame alignment */
+ if (sc & (BD_ENET_RX_NO | BD_ENET_RX_CL))
+ fep->stats.rx_frame_errors++;
+ /* CRC Error */
+ if (sc & BD_ENET_RX_CR)
+ fep->stats.rx_crc_errors++;
+ /* FIFO overrun */
+ if (sc & BD_ENET_RX_OV)
+ fep->stats.rx_crc_errors++;
+
+ skbn = fep->rx_skbuff[curidx];
+ BUG_ON(skbn == NULL);
+
+ } else {
+
+ /* napi, got packet but no quota */
+ if (fpi->use_napi && --rx_work_limit < 0)
+ break;
+
+ skb = fep->rx_skbuff[curidx];
+ BUG_ON(skb == NULL);
+
+ /*
+ * Process the incoming frame.
+ */
+ fep->stats.rx_packets++;
+ pkt_len = CBDR_DATLEN(bdp) - 4; /* remove CRC */
+ fep->stats.rx_bytes += pkt_len + 4;
+
+ if (pkt_len <= fpi->rx_copybreak) {
+ /* +2 to make IP header L1 cache aligned */
+ skbn = dev_alloc_skb(pkt_len + 2);
+ if (skbn != NULL) {
+ skb_reserve(skbn, 2); /* align IP header */
+ memcpy(skbn->data, skb->data, pkt_len);
+ /* swap */
+ skbt = skb;
+ skb = skbn;
+ skbn = skbt;
+ }
+ } else
+ skbn = dev_alloc_skb(ENET_RX_FRSIZE);
+
+ if (skbn != NULL) {
+ skb->dev = dev;
+ skb_put(skb, pkt_len); /* Make room */
+ skb->protocol = eth_type_trans(skb, dev);
+ received++;
+ if (!fpi->use_napi)
+ netif_rx(skb);
+ else
+ netif_receive_skb(skb);
+ } else {
+ printk(KERN_WARNING DRV_MODULE_NAME
+ ": %s Memory squeeze, dropping packet.\n",
+ dev->name);
+ fep->stats.rx_dropped++;
+ skbn = skb;
+ }
+ }
+
+ fep->rx_skbuff[curidx] = skbn;
+ CBDW_BUFADDR(bdp, dma_map_single(NULL, skbn->data,
+ L1_CACHE_ALIGN(PKT_MAXBUF_SIZE),
+ DMA_FROM_DEVICE));
+ CBDW_DATLEN(bdp, 0);
+ CBDW_SC(bdp, (sc & ~BD_ENET_RX_STATS) | BD_ENET_RX_EMPTY);
+
+ /*
+ * Update BD pointer to next entry.
+ */
+ if ((sc & BD_ENET_RX_WRAP) == 0)
+ bdp++;
+ else
+ bdp = fep->rx_bd_base;
+
+ /*
+ * Doing this here will keep the FEC running while we process
+ * incoming frames. On a heavily loaded network, we should be
+ * able to keep up at the expense of system resources.
+ */
+ FW(fecp, r_des_active, 0x01000000);
+ }
+
+ fep->cur_rx = bdp;
+
+ if (fpi->use_napi) {
+ dev->quota -= received;
+ *budget -= received;
+
+ if (rx_work_limit < 0)
+ return 1; /* not done */
+
+ /* done */
+ netif_rx_complete(dev);
+
+ /* enable RX interrupt bits */
+ FS(fecp, imask, FEC_ENET_RXF | FEC_ENET_RXB);
+ }
+
+ return 0;
+}
+
+static void fec_enet_tx(struct net_device *dev)
+{
+ struct fec_enet_private *fep = netdev_priv(dev);
+ cbd_t *bdp;
+ struct sk_buff *skb;
+ int dirtyidx, do_wake;
+ __u16 sc;
+
+ spin_lock(&fep->lock);
+ bdp = fep->dirty_tx;
+
+ do_wake = 0;
+ while (((sc = CBDR_SC(bdp)) & BD_ENET_TX_READY) == 0) {
+
+ dirtyidx = bdp - fep->tx_bd_base;
+
+ if (fep->tx_free == fep->tx_ring)
+ break;
+
+ skb = fep->tx_skbuff[dirtyidx];
+
+ /*
+ * Check for errors.
+ */
+ if (sc & (BD_ENET_TX_HB | BD_ENET_TX_LC |
+ BD_ENET_TX_RL | BD_ENET_TX_UN | BD_ENET_TX_CSL)) {
+ fep->stats.tx_errors++;
+ if (sc & BD_ENET_TX_HB) /* No heartbeat */
+ fep->stats.tx_heartbeat_errors++;
+ if (sc & BD_ENET_TX_LC) /* Late collision */
+ fep->stats.tx_window_errors++;
+ if (sc & BD_ENET_TX_RL) /* Retrans limit */
+ fep->stats.tx_aborted_errors++;
+ if (sc & BD_ENET_TX_UN) /* Underrun */
+ fep->stats.tx_fifo_errors++;
+ if (sc & BD_ENET_TX_CSL) /* Carrier lost */
+ fep->stats.tx_carrier_errors++;
+ } else
+ fep->stats.tx_packets++;
+
+ if (sc & BD_ENET_TX_READY)
+ printk(KERN_WARNING DRV_MODULE_NAME
+ ": %s HEY! Enet xmit interrupt and TX_READY.\n",
+ dev->name);
+
+ /*
+ * Deferred means some collisions occurred during transmit,
+ * but we eventually sent the packet OK.
+ */
+ if (sc & BD_ENET_TX_DEF)
+ fep->stats.collisions++;
+
+ /*
+ * Free the sk buffer associated with this last transmit.
+ */
+ dev_kfree_skb_irq(skb);
+ fep->tx_skbuff[dirtyidx] = NULL;
+
+ /*
+ * Update pointer to next buffer descriptor to be transmitted.
+ */
+ if ((sc & BD_ENET_TX_WRAP) == 0)
+ bdp++;
+ else
+ bdp = fep->tx_bd_base;
+
+ /*
+ * Since we have freed up a buffer, the ring is no longer
+ * full.
+ */
+ if (!fep->tx_free++)
+ do_wake = 1;
+ }
+
+ fep->dirty_tx = bdp;
+
+ spin_unlock(&fep->lock);
+
+ if (do_wake && netif_queue_stopped(dev))
+ netif_wake_queue(dev);
+}
+
+/*
+ * The interrupt handler.
+ * This is called from the MPC core interrupt.
+ */
+static irqreturn_t
+fec_enet_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct net_device *dev = dev_id;
+ struct fec_enet_private *fep;
+ const struct fec_platform_info *fpi;
+ fec_t *fecp;
+ __u32 int_events;
+ __u32 int_events_napi;
+
+ if (unlikely(dev == NULL))
+ return IRQ_NONE;
+
+ fep = netdev_priv(dev);
+ fecp = fep->fecp;
+ fpi = fep->fpi;
+
+ /*
+ * Get the interrupt events that caused us to be here.
+ */
+ while ((int_events = FR(fecp, ievent) & FR(fecp, imask)) != 0) {
+
+ if (!fpi->use_napi)
+ FW(fecp, ievent, int_events);
+ else {
+ int_events_napi = int_events & ~(FEC_ENET_RXF | FEC_ENET_RXB);
+ FW(fecp, ievent, int_events_napi);
+ }
+
+ if ((int_events & (FEC_ENET_HBERR | FEC_ENET_BABR |
+ FEC_ENET_BABT | FEC_ENET_EBERR)) != 0)
+ printk(KERN_WARNING DRV_MODULE_NAME
+ ": %s FEC ERROR(s) 0x%x\n",
+ dev->name, int_events);
+
+ if ((int_events & FEC_ENET_RXF) != 0) {
+ if (!fpi->use_napi)
+ fec_enet_rx_common(dev, NULL);
+ else {
+ if (netif_rx_schedule_prep(dev)) {
+ /* disable rx interrupts */
+ FC(fecp, imask, FEC_ENET_RXF | FEC_ENET_RXB);
+ __netif_rx_schedule(dev);
+ } else {
+ printk(KERN_ERR DRV_MODULE_NAME
+ ": %s driver bug! interrupt while in poll!\n",
+ dev->name);
+ FC(fecp, imask, FEC_ENET_RXF | FEC_ENET_RXB);
+ }
+ }
+ }
+
+ if ((int_events & FEC_ENET_TXF) != 0)
+ fec_enet_tx(dev);
+ }
+
+ return IRQ_HANDLED;
+}
+
+/* This interrupt occurs when the PHY detects a link change. */
+static irqreturn_t
+fec_mii_link_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct net_device *dev = dev_id;
+ struct fec_enet_private *fep;
+ const struct fec_platform_info *fpi;
+
+ if (unlikely(dev == NULL))
+ return IRQ_NONE;
+
+ fep = netdev_priv(dev);
+ fpi = fep->fpi;
+
+ if (!fpi->use_mdio)
+ return IRQ_NONE;
+
+ /*
+ * Acknowledge the interrupt if possible. If we have not
+ * found the PHY yet we can't process or acknowledge the
+ * interrupt now. Instead we ignore this interrupt for now,
+ * which we can do since it is edge triggered. It will be
+ * acknowledged later by fec_enet_open().
+ */
+ if (!fep->phy)
+ return IRQ_NONE;
+
+ fec_mii_ack_int(dev);
+ fec_mii_link_status_change_check(dev, 0);
+
+ return IRQ_HANDLED;
+}
+
+
+/**********************************************************************************/
+
+static int fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct fec_enet_private *fep = netdev_priv(dev);
+ fec_t *fecp = fep->fecp;
+ cbd_t *bdp;
+ int curidx;
+ unsigned long flags;
+
+ spin_lock_irqsave(&fep->tx_lock, flags);
+
+ /*
+ * Fill in a Tx ring entry
+ */
+ bdp = fep->cur_tx;
+
+ if (!fep->tx_free || (CBDR_SC(bdp) & BD_ENET_TX_READY)) {
+ netif_stop_queue(dev);
+ spin_unlock_irqrestore(&fep->tx_lock, flags);
+
+ /*
+ * Ooops. All transmit buffers are full. Bail out.
+ * This should not happen, since the tx queue should be stopped.
+ */
+ printk(KERN_WARNING DRV_MODULE_NAME
+ ": %s tx queue full!.\n", dev->name);
+ return 1;
+ }
+
+ curidx = bdp - fep->tx_bd_base;
+ /*
+ * Clear all of the status flags.
+ */
+ CBDC_SC(bdp, BD_ENET_TX_STATS);
+
+ /*
+ * Save skb pointer.
+ */
+ fep->tx_skbuff[curidx] = skb;
+
+ fep->stats.tx_bytes += skb->len;
+
+ /*
+ * Push the data cache so the CPM does not get stale memory data.
+ */
+ CBDW_BUFADDR(bdp, dma_map_single(NULL, skb->data,
+ skb->len, DMA_TO_DEVICE));
+ CBDW_DATLEN(bdp, skb->len);
+
+ dev->trans_start = jiffies;
+
+ /*
+ * If this was the last BD in the ring, start at the beginning again.
+ */
+ if ((CBDR_SC(bdp) & BD_ENET_TX_WRAP) == 0)
+ fep->cur_tx++;
+ else
+ fep->cur_tx = fep->tx_bd_base;
+
+ if (!--fep->tx_free)
+ netif_stop_queue(dev);
+
+ /*
+ * Trigger transmission start
+ */
+ CBDS_SC(bdp, BD_ENET_TX_READY | BD_ENET_TX_INTR |
+ BD_ENET_TX_LAST | BD_ENET_TX_TC);
+ FW(fecp, x_des_active, 0x01000000);
+
+ spin_unlock_irqrestore(&fep->tx_lock, flags);
+
+ return 0;
+}
+
+static void fec_timeout(struct net_device *dev)
+{
+ struct fec_enet_private *fep = netdev_priv(dev);
+
+ fep->stats.tx_errors++;
+
+ if (fep->tx_free)
+ netif_wake_queue(dev);
+
+ /* check link status again */
+ fec_mii_link_status_change_check(dev, 0);
+}
+
+static int fec_enet_open(struct net_device *dev)
+{
+ struct fec_enet_private *fep = netdev_priv(dev);
+ const struct fec_platform_info *fpi = fep->fpi;
+ unsigned long flags;
+
+ /* Install our interrupt handler. */
+ if (request_irq(fpi->fec_irq, fec_enet_interrupt, 0, "fec", dev) != 0) {
+ printk(KERN_ERR DRV_MODULE_NAME
+ ": %s Could not allocate FEC IRQ!", dev->name);
+ return -EINVAL;
+ }
+
+ /* Install our phy interrupt handler */
+ if (fpi->phy_irq != -1 &&
+ request_irq(fpi->phy_irq, fec_mii_link_interrupt, 0, "fec-phy",
+ dev) != 0) {
+ printk(KERN_ERR DRV_MODULE_NAME
+ ": %s Could not allocate PHY IRQ!", dev->name);
+ free_irq(fpi->fec_irq, dev);
+ return -EINVAL;
+ }
+
+ if (fpi->use_mdio) {
+ fec_mii_startup(dev);
+ netif_carrier_off(dev);
+ fec_mii_link_status_change_check(dev, 1);
+ } else {
+ spin_lock_irqsave(&fep->lock, flags);
+ fec_restart(dev, 1, 100); /* XXX this sucks */
+ spin_unlock_irqrestore(&fep->lock, flags);
+
+ netif_carrier_on(dev);
+ netif_start_queue(dev);
+ }
+ return 0;
+}
+
+static int fec_enet_close(struct net_device *dev)
+{
+ struct fec_enet_private *fep = netdev_priv(dev);
+ const struct fec_platform_info *fpi = fep->fpi;
+ unsigned long flags;
+
+ netif_stop_queue(dev);
+ netif_carrier_off(dev);
+
+ if (fpi->use_mdio)
+ fec_mii_shutdown(dev);
+
+ spin_lock_irqsave(&fep->lock, flags);
+ fec_stop(dev);
+ spin_unlock_irqrestore(&fep->lock, flags);
+
+ /* release any irqs */
+ if (fpi->phy_irq != -1)
+ free_irq(fpi->phy_irq, dev);
+ free_irq(fpi->fec_irq, dev);
+
+ return 0;
+}
+
+static struct net_device_stats *fec_enet_get_stats(struct net_device *dev)
+{
+ struct fec_enet_private *fep = netdev_priv(dev);
+ return &fep->stats;
+}
+
+static int fec_enet_poll(struct net_device *dev, int *budget)
+{
+ return fec_enet_rx_common(dev, budget);
+}
+
+/*************************************************************************/
+
+static void fec_get_drvinfo(struct net_device *dev,
+ struct ethtool_drvinfo *info)
+{
+ strcpy(info->driver, DRV_MODULE_NAME);
+ strcpy(info->version, DRV_MODULE_VERSION);
+}
+
+static int fec_get_regs_len(struct net_device *dev)
+{
+ return sizeof(fec_t);
+}
+
+static void fec_get_regs(struct net_device *dev, struct ethtool_regs *regs,
+ void *p)
+{
+ struct fec_enet_private *fep = netdev_priv(dev);
+ unsigned long flags;
+
+ if (regs->len < sizeof(fec_t))
+ return;
+
+ regs->version = 0;
+ spin_lock_irqsave(&fep->lock, flags);
+ memcpy_fromio(p, fep->fecp, sizeof(fec_t));
+ spin_unlock_irqrestore(&fep->lock, flags);
+}
+
+static int fec_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+ struct fec_enet_private *fep = netdev_priv(dev);
+ unsigned long flags;
+ int rc;
+
+ spin_lock_irqsave(&fep->lock, flags);
+ rc = mii_ethtool_gset(&fep->mii_if, cmd);
+ spin_unlock_irqrestore(&fep->lock, flags);
+
+ return rc;
+}
+
+static int fec_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+ struct fec_enet_private *fep = netdev_priv(dev);
+ unsigned long flags;
+ int rc;
+
+ spin_lock_irqsave(&fep->lock, flags);
+ rc = mii_ethtool_sset(&fep->mii_if, cmd);
+ spin_unlock_irqrestore(&fep->lock, flags);
+
+ return rc;
+}
+
+static int fec_nway_reset(struct net_device *dev)
+{
+ struct fec_enet_private *fep = netdev_priv(dev);
+ return mii_nway_restart(&fep->mii_if);
+}
+
+static __u32 fec_get_msglevel(struct net_device *dev)
+{
+ struct fec_enet_private *fep = netdev_priv(dev);
+ return fep->msg_enable;
+}
+
+static void fec_set_msglevel(struct net_device *dev, __u32 value)
+{
+ struct fec_enet_private *fep = netdev_priv(dev);
+ fep->msg_enable = value;
+}
+
+static struct ethtool_ops fec_ethtool_ops = {
+ .get_drvinfo = fec_get_drvinfo,
+ .get_regs_len = fec_get_regs_len,
+ .get_settings = fec_get_settings,
+ .set_settings = fec_set_settings,
+ .nway_reset = fec_nway_reset,
+ .get_link = ethtool_op_get_link,
+ .get_msglevel = fec_get_msglevel,
+ .set_msglevel = fec_set_msglevel,
+ .get_tx_csum = ethtool_op_get_tx_csum,
+ .set_tx_csum = ethtool_op_set_tx_csum, /* local! */
+ .get_sg = ethtool_op_get_sg,
+ .set_sg = ethtool_op_set_sg,
+ .get_regs = fec_get_regs,
+};
+
+static int fec_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+{
+ struct fec_enet_private *fep = netdev_priv(dev);
+ struct mii_ioctl_data *mii = (struct mii_ioctl_data *)&rq->ifr_data;
+ unsigned long flags;
+ int rc;
+
+ if (!netif_running(dev))
+ return -EINVAL;
+
+ spin_lock_irqsave(&fep->lock, flags);
+ rc = generic_mii_ioctl(&fep->mii_if, mii, cmd, NULL);
+ spin_unlock_irqrestore(&fep->lock, flags);
+ return rc;
+}
+
+int fec_8xx_init_one(const struct fec_platform_info *fpi,
+ struct net_device **devp)
+{
+ immap_t *immap = (immap_t *) IMAP_ADDR;
+ static int fec_8xx_version_printed = 0;
+ struct net_device *dev = NULL;
+ struct fec_enet_private *fep = NULL;
+ fec_t *fecp = NULL;
+ int i;
+ int err = 0;
+ int registered = 0;
+ __u32 siel;
+
+ *devp = NULL;
+
+ switch (fpi->fec_no) {
+ case 0:
+ fecp = &((immap_t *) IMAP_ADDR)->im_cpm.cp_fec;
+ break;
+#ifdef CONFIG_DUET
+ case 1:
+ fecp = &((immap_t *) IMAP_ADDR)->im_cpm.cp_fec2;
+ break;
+#endif
+ default:
+ return -EINVAL;
+ }
+
+ if (fec_8xx_version_printed++ == 0)
+ printk(KERN_INFO "%s", version);
+
+ i = sizeof(*fep) + (sizeof(struct sk_buff **) *
+ (fpi->rx_ring + fpi->tx_ring));
+
+ dev = alloc_etherdev(i);
+ if (!dev) {
+ err = -ENOMEM;
+ goto err;
+ }
+ SET_MODULE_OWNER(dev);
+
+ fep = netdev_priv(dev);
+
+ /* partial reset of FEC */
+ fec_whack_reset(fecp);
+
+ /* point rx_skbuff, tx_skbuff */
+ fep->rx_skbuff = (struct sk_buff **)&fep[1];
+ fep->tx_skbuff = fep->rx_skbuff + fpi->rx_ring;
+
+ fep->fecp = fecp;
+ fep->fpi = fpi;
+
+ /* init locks */
+ spin_lock_init(&fep->lock);
+ spin_lock_init(&fep->tx_lock);
+
+ /*
+ * Set the Ethernet address.
+ */
+ for (i = 0; i < 6; i++)
+ dev->dev_addr[i] = fpi->macaddr[i];
+
+ fep->ring_base = dma_alloc_coherent(NULL,
+ (fpi->tx_ring + fpi->rx_ring) *
+ sizeof(cbd_t), &fep->ring_mem_addr,
+ GFP_KERNEL);
+ if (fep->ring_base == NULL) {
+ printk(KERN_ERR DRV_MODULE_NAME
+ ": %s dma alloc failed.\n", dev->name);
+ err = -ENOMEM;
+ goto err;
+ }
+
+ /*
+ * Set receive and transmit descriptor base.
+ */
+ fep->rx_bd_base = fep->ring_base;
+ fep->tx_bd_base = fep->rx_bd_base + fpi->rx_ring;
+
+ /* initialize ring size variables */
+ fep->tx_ring = fpi->tx_ring;
+ fep->rx_ring = fpi->rx_ring;
+
+ /* SIU interrupt */
+ if (fpi->phy_irq != -1 &&
+ (fpi->phy_irq >= SIU_IRQ0 && fpi->phy_irq < SIU_LEVEL7)) {
+
+ siel = in_be32(&immap->im_siu_conf.sc_siel);
+ if ((fpi->phy_irq & 1) == 0)
+ siel |= (0x80000000 >> fpi->phy_irq);
+ else
+ siel &= ~(0x80000000 >> (fpi->phy_irq & ~1));
+ out_be32(&immap->im_siu_conf.sc_siel, siel);
+ }
+
+ /*
+ * The FEC Ethernet specific entries in the device structure.
+ */
+ dev->open = fec_enet_open;
+ dev->hard_start_xmit = fec_enet_start_xmit;
+ dev->tx_timeout = fec_timeout;
+ dev->watchdog_timeo = TX_TIMEOUT;
+ dev->stop = fec_enet_close;
+ dev->get_stats = fec_enet_get_stats;
+ dev->set_multicast_list = fec_set_multicast_list;
+ dev->set_mac_address = fec_set_mac_address;
+ if (fpi->use_napi) {
+ dev->poll = fec_enet_poll;
+ dev->weight = fpi->napi_weight;
+ }
+ dev->ethtool_ops = &fec_ethtool_ops;
+ dev->do_ioctl = fec_ioctl;
+
+ fep->fec_phy_speed =
+ ((((fpi->sys_clk + 4999999) / 2500000) / 2) & 0x3F) << 1;
+
+ init_timer(&fep->phy_timer_list);
+
+ /* partial reset of FEC so that only MII works */
+ FW(fecp, mii_speed, fep->fec_phy_speed);
+ FW(fecp, ievent, 0xffc0);
+ FW(fecp, ivec, (fpi->fec_irq / 2) << 29);
+ FW(fecp, imask, 0);
+ FW(fecp, r_cntrl, FEC_RCNTRL_MII_MODE); /* MII enable */
+ FW(fecp, ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN);
+
+ netif_carrier_off(dev);
+
+ err = register_netdev(dev);
+ if (err != 0)
+ goto err;
+ registered = 1;
+
+ if (fpi->use_mdio) {
+ fep->mii_if.dev = dev;
+ fep->mii_if.mdio_read = fec_mii_read;
+ fep->mii_if.mdio_write = fec_mii_write;
+ fep->mii_if.phy_id_mask = 0x1f;
+ fep->mii_if.reg_num_mask = 0x1f;
+ fep->mii_if.phy_id = fec_mii_phy_id_detect(dev);
+ }
+
+ *devp = dev;
+
+ return 0;
+
+ err:
+ if (dev != NULL) {
+ if (fecp != NULL)
+ fec_whack_reset(fecp);
+
+ if (registered)
+ unregister_netdev(dev);
+
+ if (fep != NULL) {
+ if (fep->ring_base)
+ dma_free_coherent(NULL,
+ (fpi->tx_ring +
+ fpi->rx_ring) *
+ sizeof(cbd_t), fep->ring_base,
+ fep->ring_mem_addr);
+ }
+ free_netdev(dev);
+ }
+ return err;
+}
+
+int fec_8xx_cleanup_one(struct net_device *dev)
+{
+ struct fec_enet_private *fep = netdev_priv(dev);
+ fec_t *fecp = fep->fecp;
+ const struct fec_platform_info *fpi = fep->fpi;
+
+ fec_whack_reset(fecp);
+
+ unregister_netdev(dev);
+
+ dma_free_coherent(NULL, (fpi->tx_ring + fpi->rx_ring) * sizeof(cbd_t),
+ fep->ring_base, fep->ring_mem_addr);
+
+ free_netdev(dev);
+
+ return 0;
+}
+
+/**************************************************************************************/
+/**************************************************************************************/
+/**************************************************************************************/
+
+static int __init fec_8xx_init(void)
+{
+ return fec_8xx_platform_init();
+}
+
+static void __exit fec_8xx_cleanup(void)
+{
+ fec_8xx_platform_cleanup();
+}
+
+/**************************************************************************************/
+/**************************************************************************************/
+/**************************************************************************************/
+
+module_init(fec_8xx_init);
+module_exit(fec_8xx_cleanup);
git://git.onelab.eu / linux-2.6.git / blobdiff