+++ /dev/null
-/*
- * Ethernet driver for Motorola MPC8260.
- * Copyright (c) 1999 Dan Malek (dmalek@jlc.net)
- * Copyright (c) 2000 MontaVista Software Inc. (source@mvista.com)
- * 2.3.99 Updates
- *
- * I copied this from the 8xx CPM Ethernet driver, so follow the
- * credits back through that.
- *
- * This version of the driver is somewhat selectable for the different
- * processor/board combinations. It works for the boards I know about
- * now, and should be easily modified to include others. Some of the
- * configuration information is contained in <asm/cpm1.h> and the
- * remainder is here.
- *
- * Buffer descriptors are kept in the CPM dual port RAM, and the frame
- * buffers are in the host memory.
- *
- * Right now, I am very watseful with the buffers. I allocate memory
- * pages and then divide them into 2K frame buffers. This way I know I
- * have buffers large enough to hold one frame within one buffer descriptor.
- * Once I get this working, I will use 64 or 128 byte CPM buffers, which
- * will be much more memory efficient and will easily handle lots of
- * small packets.
- *
- */
-#include <linux/kernel.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/init.h>
-#include <linux/delay.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/spinlock.h>
-#include <linux/bitops.h>
-
-#include <asm/immap_cpm2.h>
-#include <asm/pgtable.h>
-#include <asm/mpc8260.h>
-#include <asm/uaccess.h>
-#include <asm/cpm2.h>
-#include <asm/irq.h>
-
-/*
- * Theory of Operation
- *
- * The MPC8260 CPM performs the Ethernet processing on an SCC. It can use
- * an aribtrary number of buffers on byte boundaries, but must have at
- * least two receive buffers to prevent constant overrun conditions.
- *
- * The buffer descriptors are allocated from the CPM dual port memory
- * with the data buffers allocated from host memory, just like all other
- * serial communication protocols. The host memory buffers are allocated
- * from the free page pool, and then divided into smaller receive and
- * transmit buffers. The size of the buffers should be a power of two,
- * since that nicely divides the page. This creates a ring buffer
- * structure similar to the LANCE and other controllers.
- *
- * Like the LANCE driver:
- * The driver runs as two independent, single-threaded flows of control. One
- * is the send-packet routine, which enforces single-threaded use by the
- * cep->tx_busy flag. The other thread is the interrupt handler, which is
- * single threaded by the hardware and other software.
- */
-
-/* The transmitter timeout
- */
-#define TX_TIMEOUT (2*HZ)
-
-/* The number of Tx and Rx buffers. These are allocated from the page
- * pool. The code may assume these are power of two, so it is best
- * to keep them that size.
- * We don't need to allocate pages for the transmitter. We just use
- * the skbuffer directly.
- */
-#define CPM_ENET_RX_PAGES 4
-#define CPM_ENET_RX_FRSIZE 2048
-#define CPM_ENET_RX_FRPPG (PAGE_SIZE / CPM_ENET_RX_FRSIZE)
-#define RX_RING_SIZE (CPM_ENET_RX_FRPPG * CPM_ENET_RX_PAGES)
-#define TX_RING_SIZE 8 /* Must be power of two */
-#define TX_RING_MOD_MASK 7 /* for this to work */
-
-/* The CPM stores dest/src/type, data, and checksum for receive packets.
- */
-#define PKT_MAXBUF_SIZE 1518
-#define PKT_MINBUF_SIZE 64
-#define PKT_MAXBLR_SIZE 1520
-
-/* The CPM buffer descriptors track the ring buffers. The rx_bd_base and
- * tx_bd_base always point to the base of the buffer descriptors. The
- * cur_rx and cur_tx point to the currently available buffer.
- * The dirty_tx tracks the current buffer that is being sent by the
- * controller. The cur_tx and dirty_tx are equal under both completely
- * empty and completely full conditions. The empty/ready indicator in
- * the buffer descriptor determines the actual condition.
- */
-struct scc_enet_private {
- /* The saved address of a sent-in-place packet/buffer, for skfree(). */
- struct sk_buff* tx_skbuff[TX_RING_SIZE];
- ushort skb_cur;
- ushort skb_dirty;
-
- /* CPM dual port RAM relative addresses.
- */
- cbd_t *rx_bd_base; /* Address of Rx and Tx buffers. */
- cbd_t *tx_bd_base;
- cbd_t *cur_rx, *cur_tx; /* The next free ring entry */
- cbd_t *dirty_tx; /* The ring entries to be free()ed. */
- scc_t *sccp;
- struct net_device_stats stats;
- uint tx_full;
- spinlock_t lock;
-};
-
-static int scc_enet_open(struct net_device *dev);
-static int scc_enet_start_xmit(struct sk_buff *skb, struct net_device *dev);
-static int scc_enet_rx(struct net_device *dev);
-static irqreturn_t scc_enet_interrupt(int irq, void *dev_id);
-static int scc_enet_close(struct net_device *dev);
-static struct net_device_stats *scc_enet_get_stats(struct net_device *dev);
-static void set_multicast_list(struct net_device *dev);
-
-/* These will be configurable for the SCC choice.
-*/
-#define CPM_ENET_BLOCK CPM_CR_SCC1_SBLOCK
-#define CPM_ENET_PAGE CPM_CR_SCC1_PAGE
-#define PROFF_ENET PROFF_SCC1
-#define SCC_ENET 0
-#define SIU_INT_ENET SIU_INT_SCC1
-
-/* These are both board and SCC dependent....
-*/
-#define PD_ENET_RXD ((uint)0x00000001)
-#define PD_ENET_TXD ((uint)0x00000002)
-#define PD_ENET_TENA ((uint)0x00000004)
-#define PC_ENET_RENA ((uint)0x00020000)
-#define PC_ENET_CLSN ((uint)0x00000004)
-#define PC_ENET_TXCLK ((uint)0x00000800)
-#define PC_ENET_RXCLK ((uint)0x00000400)
-#define CMX_CLK_ROUTE ((uint)0x25000000)
-#define CMX_CLK_MASK ((uint)0xff000000)
-
-/* Specific to a board.
-*/
-#define PC_EST8260_ENET_LOOPBACK ((uint)0x80000000)
-#define PC_EST8260_ENET_SQE ((uint)0x40000000)
-#define PC_EST8260_ENET_NOTFD ((uint)0x20000000)
-
-static int
-scc_enet_open(struct net_device *dev)
-{
-
- /* I should reset the ring buffers here, but I don't yet know
- * a simple way to do that.
- */
- netif_start_queue(dev);
- return 0; /* Always succeed */
-}
-
-static int
-scc_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
-{
- struct scc_enet_private *cep = (struct scc_enet_private *)dev->priv;
- volatile cbd_t *bdp;
-
-
- /* Fill in a Tx ring entry */
- bdp = cep->cur_tx;
-
-#ifndef final_version
- if (bdp->cbd_sc & BD_ENET_TX_READY) {
- /* Ooops. All transmit buffers are full. Bail out.
- * This should not happen, since cep->tx_full should be set.
- */
- printk("%s: tx queue full!.\n", dev->name);
- return 1;
- }
-#endif
-
- /* Clear all of the status flags.
- */
- bdp->cbd_sc &= ~BD_ENET_TX_STATS;
-
- /* If the frame is short, tell CPM to pad it.
- */
- if (skb->len <= ETH_ZLEN)
- bdp->cbd_sc |= BD_ENET_TX_PAD;
- else
- bdp->cbd_sc &= ~BD_ENET_TX_PAD;
-
- /* Set buffer length and buffer pointer.
- */
- bdp->cbd_datlen = skb->len;
- bdp->cbd_bufaddr = __pa(skb->data);
-
- /* Save skb pointer.
- */
- cep->tx_skbuff[cep->skb_cur] = skb;
-
- cep->stats.tx_bytes += skb->len;
- cep->skb_cur = (cep->skb_cur+1) & TX_RING_MOD_MASK;
-
- spin_lock_irq(&cep->lock);
-
- /* Send it on its way. Tell CPM its ready, interrupt when done,
- * its the last BD of the frame, and to put the CRC on the end.
- */
- bdp->cbd_sc |= (BD_ENET_TX_READY | BD_ENET_TX_INTR | BD_ENET_TX_LAST | BD_ENET_TX_TC);
-
- dev->trans_start = jiffies;
-
- /* If this was the last BD in the ring, start at the beginning again.
- */
- if (bdp->cbd_sc & BD_ENET_TX_WRAP)
- bdp = cep->tx_bd_base;
- else
- bdp++;
-
- if (bdp->cbd_sc & BD_ENET_TX_READY) {
- netif_stop_queue(dev);
- cep->tx_full = 1;
- }
-
- cep->cur_tx = (cbd_t *)bdp;
-
- spin_unlock_irq(&cep->lock);
-
- return 0;
-}
-
-static void
-scc_enet_timeout(struct net_device *dev)
-{
- struct scc_enet_private *cep = (struct scc_enet_private *)dev->priv;
-
- printk("%s: transmit timed out.\n", dev->name);
- cep->stats.tx_errors++;
-#ifndef final_version
- {
- int i;
- cbd_t *bdp;
- printk(" Ring data dump: cur_tx %p%s cur_rx %p.\n",
- cep->cur_tx, cep->tx_full ? " (full)" : "",
- cep->cur_rx);
- bdp = cep->tx_bd_base;
- printk(" Tx @base %p :\n", bdp);
- for (i = 0 ; i < TX_RING_SIZE; i++, bdp++)
- printk("%04x %04x %08x\n",
- bdp->cbd_sc,
- bdp->cbd_datlen,
- bdp->cbd_bufaddr);
- bdp = cep->rx_bd_base;
- printk(" Rx @base %p :\n", bdp);
- for (i = 0 ; i < RX_RING_SIZE; i++, bdp++)
- printk("%04x %04x %08x\n",
- bdp->cbd_sc,
- bdp->cbd_datlen,
- bdp->cbd_bufaddr);
- }
-#endif
- if (!cep->tx_full)
- netif_wake_queue(dev);
-}
-
-/* The interrupt handler.
- * This is called from the CPM handler, not the MPC core interrupt.
- */
-static irqreturn_t
-scc_enet_interrupt(int irq, void *dev_id)
-{
- struct net_device *dev = dev_id;
- volatile struct scc_enet_private *cep;
- volatile cbd_t *bdp;
- ushort int_events;
- int must_restart;
-
- cep = dev->priv;
-
- /* Get the interrupt events that caused us to be here.
- */
- int_events = cep->sccp->scc_scce;
- cep->sccp->scc_scce = int_events;
- must_restart = 0;
-
- /* Handle receive event in its own function.
- */
- if (int_events & SCCE_ENET_RXF)
- scc_enet_rx(dev_id);
-
- /* Check for a transmit error. The manual is a little unclear
- * about this, so the debug code until I get it figured out. It
- * appears that if TXE is set, then TXB is not set. However,
- * if carrier sense is lost during frame transmission, the TXE
- * bit is set, "and continues the buffer transmission normally."
- * I don't know if "normally" implies TXB is set when the buffer
- * descriptor is closed.....trial and error :-).
- */
-
- /* Transmit OK, or non-fatal error. Update the buffer descriptors.
- */
- if (int_events & (SCCE_ENET_TXE | SCCE_ENET_TXB)) {
- spin_lock(&cep->lock);
- bdp = cep->dirty_tx;
- while ((bdp->cbd_sc&BD_ENET_TX_READY)==0) {
- if ((bdp==cep->cur_tx) && (cep->tx_full == 0))
- break;
-
- if (bdp->cbd_sc & BD_ENET_TX_HB) /* No heartbeat */
- cep->stats.tx_heartbeat_errors++;
- if (bdp->cbd_sc & BD_ENET_TX_LC) /* Late collision */
- cep->stats.tx_window_errors++;
- if (bdp->cbd_sc & BD_ENET_TX_RL) /* Retrans limit */
- cep->stats.tx_aborted_errors++;
- if (bdp->cbd_sc & BD_ENET_TX_UN) /* Underrun */
- cep->stats.tx_fifo_errors++;
- if (bdp->cbd_sc & BD_ENET_TX_CSL) /* Carrier lost */
- cep->stats.tx_carrier_errors++;
-
-
- /* No heartbeat or Lost carrier are not really bad errors.
- * The others require a restart transmit command.
- */
- if (bdp->cbd_sc &
- (BD_ENET_TX_LC | BD_ENET_TX_RL | BD_ENET_TX_UN)) {
- must_restart = 1;
- cep->stats.tx_errors++;
- }
-
- cep->stats.tx_packets++;
-
- /* Deferred means some collisions occurred during transmit,
- * but we eventually sent the packet OK.
- */
- if (bdp->cbd_sc & BD_ENET_TX_DEF)
- cep->stats.collisions++;
-
- /* Free the sk buffer associated with this last transmit.
- */
- dev_kfree_skb_irq(cep->tx_skbuff[cep->skb_dirty]);
- cep->skb_dirty = (cep->skb_dirty + 1) & TX_RING_MOD_MASK;
-
- /* Update pointer to next buffer descriptor to be transmitted.
- */
- if (bdp->cbd_sc & BD_ENET_TX_WRAP)
- bdp = cep->tx_bd_base;
- else
- bdp++;
-
- /* I don't know if we can be held off from processing these
- * interrupts for more than one frame time. I really hope
- * not. In such a case, we would now want to check the
- * currently available BD (cur_tx) and determine if any
- * buffers between the dirty_tx and cur_tx have also been
- * sent. We would want to process anything in between that
- * does not have BD_ENET_TX_READY set.
- */
-
- /* Since we have freed up a buffer, the ring is no longer
- * full.
- */
- if (cep->tx_full) {
- cep->tx_full = 0;
- if (netif_queue_stopped(dev)) {
- netif_wake_queue(dev);
- }
- }
-
- cep->dirty_tx = (cbd_t *)bdp;
- }
-
- if (must_restart) {
- volatile cpm_cpm2_t *cp;
-
- /* Some transmit errors cause the transmitter to shut
- * down. We now issue a restart transmit. Since the
- * errors close the BD and update the pointers, the restart
- * _should_ pick up without having to reset any of our
- * pointers either.
- */
-
- cp = cpmp;
- cp->cp_cpcr =
- mk_cr_cmd(CPM_ENET_PAGE, CPM_ENET_BLOCK, 0,
- CPM_CR_RESTART_TX) | CPM_CR_FLG;
- while (cp->cp_cpcr & CPM_CR_FLG);
- }
- spin_unlock(&cep->lock);
- }
-
- /* Check for receive busy, i.e. packets coming but no place to
- * put them. This "can't happen" because the receive interrupt
- * is tossing previous frames.
- */
- if (int_events & SCCE_ENET_BSY) {
- cep->stats.rx_dropped++;
- printk("SCC ENET: BSY can't happen.\n");
- }
-
- return IRQ_HANDLED;
-}
-
-/* During a receive, the cur_rx points to the current incoming buffer.
- * When we update through the ring, if the next incoming buffer has
- * not been given to the system, we just set the empty indicator,
- * effectively tossing the packet.
- */
-static int
-scc_enet_rx(struct net_device *dev)
-{
- struct scc_enet_private *cep;
- volatile cbd_t *bdp;
- struct sk_buff *skb;
- ushort pkt_len;
-
- cep = dev->priv;
-
- /* First, grab all of the stats for the incoming packet.
- * These get messed up if we get called due to a busy condition.
- */
- bdp = cep->cur_rx;
-
-for (;;) {
- if (bdp->cbd_sc & BD_ENET_RX_EMPTY)
- break;
-
-#ifndef final_version
- /* Since we have allocated space to hold a complete frame, both
- * the first and last indicators should be set.
- */
- if ((bdp->cbd_sc & (BD_ENET_RX_FIRST | BD_ENET_RX_LAST)) !=
- (BD_ENET_RX_FIRST | BD_ENET_RX_LAST))
- printk("CPM ENET: rcv is not first+last\n");
-#endif
-
- /* Frame too long or too short.
- */
- if (bdp->cbd_sc & (BD_ENET_RX_LG | BD_ENET_RX_SH))
- cep->stats.rx_length_errors++;
- if (bdp->cbd_sc & BD_ENET_RX_NO) /* Frame alignment */
- cep->stats.rx_frame_errors++;
- if (bdp->cbd_sc & BD_ENET_RX_CR) /* CRC Error */
- cep->stats.rx_crc_errors++;
- if (bdp->cbd_sc & BD_ENET_RX_OV) /* FIFO overrun */
- cep->stats.rx_crc_errors++;
-
- /* Report late collisions as a frame error.
- * On this error, the BD is closed, but we don't know what we
- * have in the buffer. So, just drop this frame on the floor.
- */
- if (bdp->cbd_sc & BD_ENET_RX_CL) {
- cep->stats.rx_frame_errors++;
- }
- else {
-
- /* Process the incoming frame.
- */
- cep->stats.rx_packets++;
- pkt_len = bdp->cbd_datlen;
- cep->stats.rx_bytes += pkt_len;
-
- /* This does 16 byte alignment, much more than we need.
- * The packet length includes FCS, but we don't want to
- * include that when passing upstream as it messes up
- * bridging applications.
- */
- skb = dev_alloc_skb(pkt_len-4);
-
- if (skb == NULL) {
- printk("%s: Memory squeeze, dropping packet.\n", dev->name);
- cep->stats.rx_dropped++;
- }
- else {
- skb_put(skb,pkt_len-4); /* Make room */
- skb_copy_to_linear_data(skb,
- (unsigned char *)__va(bdp->cbd_bufaddr),
- pkt_len-4);
- skb->protocol=eth_type_trans(skb,dev);
- netif_rx(skb);
- }
- }
-
- /* Clear the status flags for this buffer.
- */
- bdp->cbd_sc &= ~BD_ENET_RX_STATS;
-
- /* Mark the buffer empty.
- */
- bdp->cbd_sc |= BD_ENET_RX_EMPTY;
-
- /* Update BD pointer to next entry.
- */
- if (bdp->cbd_sc & BD_ENET_RX_WRAP)
- bdp = cep->rx_bd_base;
- else
- bdp++;
-
- }
- cep->cur_rx = (cbd_t *)bdp;
-
- return 0;
-}
-
-static int
-scc_enet_close(struct net_device *dev)
-{
- /* Don't know what to do yet.
- */
- netif_stop_queue(dev);
-
- return 0;
-}
-
-static struct net_device_stats *scc_enet_get_stats(struct net_device *dev)
-{
- struct scc_enet_private *cep = (struct scc_enet_private *)dev->priv;
-
- return &cep->stats;
-}
-
-/* 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 set_multicast_list(struct net_device *dev)
-{
- struct scc_enet_private *cep;
- struct dev_mc_list *dmi;
- u_char *mcptr, *tdptr;
- volatile scc_enet_t *ep;
- int i, j;
- cep = (struct scc_enet_private *)dev->priv;
-
- /* Get pointer to SCC area in parameter RAM.
- */
- ep = (scc_enet_t *)dev->base_addr;
-
- if (dev->flags&IFF_PROMISC) {
-
- /* Log any net taps. */
- printk("%s: Promiscuous mode enabled.\n", dev->name);
- cep->sccp->scc_psmr |= SCC_PSMR_PRO;
- } else {
-
- cep->sccp->scc_psmr &= ~SCC_PSMR_PRO;
-
- if (dev->flags & IFF_ALLMULTI) {
- /* Catch all multicast addresses, so set the
- * filter to all 1's.
- */
- ep->sen_gaddr1 = 0xffff;
- ep->sen_gaddr2 = 0xffff;
- ep->sen_gaddr3 = 0xffff;
- ep->sen_gaddr4 = 0xffff;
- }
- else {
- /* Clear filter and add the addresses in the list.
- */
- ep->sen_gaddr1 = 0;
- ep->sen_gaddr2 = 0;
- ep->sen_gaddr3 = 0;
- ep->sen_gaddr4 = 0;
-
- dmi = dev->mc_list;
-
- for (i=0; i<dev->mc_count; i++) {
-
- /* Only support group multicast for now.
- */
- if (!(dmi->dmi_addr[0] & 1))
- continue;
-
- /* The address in dmi_addr is LSB first,
- * and taddr is MSB first. We have to
- * copy bytes MSB first from dmi_addr.
- */
- mcptr = (u_char *)dmi->dmi_addr + 5;
- tdptr = (u_char *)&ep->sen_taddrh;
- for (j=0; j<6; j++)
- *tdptr++ = *mcptr--;
-
- /* Ask CPM to run CRC and set bit in
- * filter mask.
- */
- cpmp->cp_cpcr = mk_cr_cmd(CPM_ENET_PAGE,
- CPM_ENET_BLOCK, 0,
- CPM_CR_SET_GADDR) | CPM_CR_FLG;
- /* this delay is necessary here -- Cort */
- udelay(10);
- while (cpmp->cp_cpcr & CPM_CR_FLG);
- }
- }
- }
-}
-
-/* Initialize the CPM Ethernet on SCC.
- */
-static int __init scc_enet_init(void)
-{
- struct net_device *dev;
- struct scc_enet_private *cep;
- int i, j, err;
- uint dp_offset;
- unsigned char *eap;
- unsigned long mem_addr;
- bd_t *bd;
- volatile cbd_t *bdp;
- volatile cpm_cpm2_t *cp;
- volatile scc_t *sccp;
- volatile scc_enet_t *ep;
- volatile cpm2_map_t *immap;
- volatile iop_cpm2_t *io;
-
- cp = cpmp; /* Get pointer to Communication Processor */
-
- immap = (cpm2_map_t *)CPM_MAP_ADDR; /* and to internal registers */
- io = &immap->im_ioport;
-
- bd = (bd_t *)__res;
-
- /* Create an Ethernet device instance.
- */
- dev = alloc_etherdev(sizeof(*cep));
- if (!dev)
- return -ENOMEM;
-
- cep = dev->priv;
- spin_lock_init(&cep->lock);
-
- /* Get pointer to SCC area in parameter RAM.
- */
- ep = (scc_enet_t *)(&immap->im_dprambase[PROFF_ENET]);
-
- /* And another to the SCC register area.
- */
- sccp = (volatile scc_t *)(&immap->im_scc[SCC_ENET]);
- cep->sccp = (scc_t *)sccp; /* Keep the pointer handy */
-
- /* Disable receive and transmit in case someone left it running.
- */
- sccp->scc_gsmrl &= ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT);
-
- /* Configure port C and D pins for SCC Ethernet. This
- * won't work for all SCC possibilities....it will be
- * board/port specific.
- */
- io->iop_pparc |=
- (PC_ENET_RENA | PC_ENET_CLSN | PC_ENET_TXCLK | PC_ENET_RXCLK);
- io->iop_pdirc &=
- ~(PC_ENET_RENA | PC_ENET_CLSN | PC_ENET_TXCLK | PC_ENET_RXCLK);
- io->iop_psorc &=
- ~(PC_ENET_RENA | PC_ENET_TXCLK | PC_ENET_RXCLK);
- io->iop_psorc |= PC_ENET_CLSN;
-
- io->iop_ppard |= (PD_ENET_RXD | PD_ENET_TXD | PD_ENET_TENA);
- io->iop_pdird |= (PD_ENET_TXD | PD_ENET_TENA);
- io->iop_pdird &= ~PD_ENET_RXD;
- io->iop_psord |= PD_ENET_TXD;
- io->iop_psord &= ~(PD_ENET_RXD | PD_ENET_TENA);
-
- /* Configure Serial Interface clock routing.
- * First, clear all SCC bits to zero, then set the ones we want.
- */
- immap->im_cpmux.cmx_scr &= ~CMX_CLK_MASK;
- immap->im_cpmux.cmx_scr |= CMX_CLK_ROUTE;
-
- /* Allocate space for the buffer descriptors in the DP ram.
- * These are relative offsets in the DP ram address space.
- * Initialize base addresses for the buffer descriptors.
- */
- dp_offset = cpm_dpalloc(sizeof(cbd_t) * RX_RING_SIZE, 8);
- ep->sen_genscc.scc_rbase = dp_offset;
- cep->rx_bd_base = (cbd_t *)cpm_dpram_addr(dp_offset);
-
- dp_offset = cpm_dpalloc(sizeof(cbd_t) * TX_RING_SIZE, 8);
- ep->sen_genscc.scc_tbase = dp_offset;
- cep->tx_bd_base = (cbd_t *)cpm_dpram_addr(dp_offset);
-
- cep->dirty_tx = cep->cur_tx = cep->tx_bd_base;
- cep->cur_rx = cep->rx_bd_base;
-
- ep->sen_genscc.scc_rfcr = CPMFCR_GBL | CPMFCR_EB;
- ep->sen_genscc.scc_tfcr = CPMFCR_GBL | CPMFCR_EB;
-
- /* Set maximum bytes per receive buffer.
- * This appears to be an Ethernet frame size, not the buffer
- * fragment size. It must be a multiple of four.
- */
- ep->sen_genscc.scc_mrblr = PKT_MAXBLR_SIZE;
-
- /* Set CRC preset and mask.
- */
- ep->sen_cpres = 0xffffffff;
- ep->sen_cmask = 0xdebb20e3;
-
- ep->sen_crcec = 0; /* CRC Error counter */
- ep->sen_alec = 0; /* alignment error counter */
- ep->sen_disfc = 0; /* discard frame counter */
-
- ep->sen_pads = 0x8888; /* Tx short frame pad character */
- ep->sen_retlim = 15; /* Retry limit threshold */
-
- ep->sen_maxflr = PKT_MAXBUF_SIZE; /* maximum frame length register */
- ep->sen_minflr = PKT_MINBUF_SIZE; /* minimum frame length register */
-
- ep->sen_maxd1 = PKT_MAXBLR_SIZE; /* maximum DMA1 length */
- ep->sen_maxd2 = PKT_MAXBLR_SIZE; /* maximum DMA2 length */
-
- /* Clear hash tables.
- */
- ep->sen_gaddr1 = 0;
- ep->sen_gaddr2 = 0;
- ep->sen_gaddr3 = 0;
- ep->sen_gaddr4 = 0;
- ep->sen_iaddr1 = 0;
- ep->sen_iaddr2 = 0;
- ep->sen_iaddr3 = 0;
- ep->sen_iaddr4 = 0;
-
- /* Set Ethernet station address.
- *
- * This is supplied in the board information structure, so we
- * copy that into the controller.
- */
- eap = (unsigned char *)&(ep->sen_paddrh);
- for (i=5; i>=0; i--)
- *eap++ = dev->dev_addr[i] = bd->bi_enetaddr[i];
-
- ep->sen_pper = 0; /* 'cause the book says so */
- ep->sen_taddrl = 0; /* temp address (LSB) */
- ep->sen_taddrm = 0;
- ep->sen_taddrh = 0; /* temp address (MSB) */
-
- /* Now allocate the host memory pages and initialize the
- * buffer descriptors.
- */
- bdp = cep->tx_bd_base;
- for (i=0; i<TX_RING_SIZE; i++) {
-
- /* Initialize the BD for every fragment in the page.
- */
- bdp->cbd_sc = 0;
- bdp->cbd_bufaddr = 0;
- bdp++;
- }
-
- /* Set the last buffer to wrap.
- */
- bdp--;
- bdp->cbd_sc |= BD_SC_WRAP;
-
- bdp = cep->rx_bd_base;
- for (i=0; i<CPM_ENET_RX_PAGES; i++) {
-
- /* Allocate a page.
- */
- mem_addr = __get_free_page(GFP_KERNEL);
- /* BUG: no check for failure */
-
- /* Initialize the BD for every fragment in the page.
- */
- for (j=0; j<CPM_ENET_RX_FRPPG; j++) {
- bdp->cbd_sc = BD_ENET_RX_EMPTY | BD_ENET_RX_INTR;
- bdp->cbd_bufaddr = __pa(mem_addr);
- mem_addr += CPM_ENET_RX_FRSIZE;
- bdp++;
- }
- }
-
- /* Set the last buffer to wrap.
- */
- bdp--;
- bdp->cbd_sc |= BD_SC_WRAP;
-
- /* Let's re-initialize the channel now. We have to do it later
- * than the manual describes because we have just now finished
- * the BD initialization.
- */
- cpmp->cp_cpcr = mk_cr_cmd(CPM_ENET_PAGE, CPM_ENET_BLOCK, 0,
- CPM_CR_INIT_TRX) | CPM_CR_FLG;
- while (cp->cp_cpcr & CPM_CR_FLG);
-
- cep->skb_cur = cep->skb_dirty = 0;
-
- sccp->scc_scce = 0xffff; /* Clear any pending events */
-
- /* Enable interrupts for transmit error, complete frame
- * received, and any transmit buffer we have also set the
- * interrupt flag.
- */
- sccp->scc_sccm = (SCCE_ENET_TXE | SCCE_ENET_RXF | SCCE_ENET_TXB);
-
- /* Install our interrupt handler.
- */
- request_irq(SIU_INT_ENET, scc_enet_interrupt, 0, "enet", dev);
- /* BUG: no check for failure */
-
- /* Set GSMR_H to enable all normal operating modes.
- * Set GSMR_L to enable Ethernet to MC68160.
- */
- sccp->scc_gsmrh = 0;
- sccp->scc_gsmrl = (SCC_GSMRL_TCI | SCC_GSMRL_TPL_48 | SCC_GSMRL_TPP_10 | SCC_GSMRL_MODE_ENET);
-
- /* Set sync/delimiters.
- */
- sccp->scc_dsr = 0xd555;
-
- /* Set processing mode. Use Ethernet CRC, catch broadcast, and
- * start frame search 22 bit times after RENA.
- */
- sccp->scc_psmr = (SCC_PSMR_ENCRC | SCC_PSMR_NIB22);
-
- /* It is now OK to enable the Ethernet transmitter.
- * Unfortunately, there are board implementation differences here.
- */
- io->iop_pparc &= ~(PC_EST8260_ENET_LOOPBACK |
- PC_EST8260_ENET_SQE | PC_EST8260_ENET_NOTFD);
- io->iop_psorc &= ~(PC_EST8260_ENET_LOOPBACK |
- PC_EST8260_ENET_SQE | PC_EST8260_ENET_NOTFD);
- io->iop_pdirc |= (PC_EST8260_ENET_LOOPBACK |
- PC_EST8260_ENET_SQE | PC_EST8260_ENET_NOTFD);
- io->iop_pdatc &= ~(PC_EST8260_ENET_LOOPBACK | PC_EST8260_ENET_SQE);
- io->iop_pdatc |= PC_EST8260_ENET_NOTFD;
-
- dev->base_addr = (unsigned long)ep;
-
- /* The CPM Ethernet specific entries in the device structure. */
- dev->open = scc_enet_open;
- dev->hard_start_xmit = scc_enet_start_xmit;
- dev->tx_timeout = scc_enet_timeout;
- dev->watchdog_timeo = TX_TIMEOUT;
- dev->stop = scc_enet_close;
- dev->get_stats = scc_enet_get_stats;
- dev->set_multicast_list = set_multicast_list;
-
- /* And last, enable the transmit and receive processing.
- */
- sccp->scc_gsmrl |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT);
-
- err = register_netdev(dev);
- if (err) {
- free_netdev(dev);
- return err;
- }
-
- printk("%s: SCC ENET Version 0.1, ", dev->name);
- for (i=0; i<5; i++)
- printk("%02x:", dev->dev_addr[i]);
- printk("%02x\n", dev->dev_addr[5]);
-
- return 0;
-}
-
-module_init(scc_enet_init);
git.samba.org / sfrench / cifs-2.6.git / blobdiff