Back to home page

OSCL-LXR
 
 

     

0001 /*
0002  * Amiga Linux/68k A2065 Ethernet Driver
0003  *
0004  * (C) Copyright 1995-2003 by Geert Uytterhoeven <geert@linux-m68k.org>
0005  *
0006  * Fixes and tips by:
0007  *  - Janos Farkas (CHEXUM@sparta.banki.hu)
0008  *  - Jes Degn Soerensen (jds@kom.auc.dk)
0009  *  - Matt Domsch (Matt_Domsch@dell.com)
0010  *
0011  * ----------------------------------------------------------------------------
0012  *
0013  * This program is based on
0014  *
0015  *  ariadne.?:  Amiga Linux/68k Ariadne Ethernet Driver
0016  *          (C) Copyright 1995 by Geert Uytterhoeven,
0017  *                                            Peter De Schrijver
0018  *
0019  *  lance.c:    An AMD LANCE ethernet driver for linux.
0020  *          Written 1993-94 by Donald Becker.
0021  *
0022  *  Am79C960:   PCnet(tm)-ISA Single-Chip Ethernet Controller
0023  *          Advanced Micro Devices
0024  *          Publication #16907, Rev. B, Amendment/0, May 1994
0025  *
0026  * ----------------------------------------------------------------------------
0027  *
0028  * This file is subject to the terms and conditions of the GNU General Public
0029  * License.  See the file COPYING in the main directory of the Linux
0030  * distribution for more details.
0031  *
0032  * ----------------------------------------------------------------------------
0033  *
0034  * The A2065 is a Zorro-II board made by Commodore/Ameristar. It contains:
0035  *
0036  *  - an Am7990 Local Area Network Controller for Ethernet (LANCE) with
0037  *    both 10BASE-2 (thin coax) and AUI (DB-15) connectors
0038  */
0039 
0040 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
0041 
0042 /*#define DEBUG*/
0043 /*#define TEST_HITS*/
0044 
0045 #include <linux/errno.h>
0046 #include <linux/netdevice.h>
0047 #include <linux/etherdevice.h>
0048 #include <linux/module.h>
0049 #include <linux/stddef.h>
0050 #include <linux/kernel.h>
0051 #include <linux/interrupt.h>
0052 #include <linux/ioport.h>
0053 #include <linux/skbuff.h>
0054 #include <linux/string.h>
0055 #include <linux/init.h>
0056 #include <linux/crc32.h>
0057 #include <linux/zorro.h>
0058 #include <linux/bitops.h>
0059 
0060 #include <asm/byteorder.h>
0061 #include <asm/irq.h>
0062 #include <asm/amigaints.h>
0063 #include <asm/amigahw.h>
0064 
0065 #include "a2065.h"
0066 
0067 /* Transmit/Receive Ring Definitions */
0068 
0069 #define LANCE_LOG_TX_BUFFERS    (2)
0070 #define LANCE_LOG_RX_BUFFERS    (4)
0071 
0072 #define TX_RING_SIZE        (1 << LANCE_LOG_TX_BUFFERS)
0073 #define RX_RING_SIZE        (1 << LANCE_LOG_RX_BUFFERS)
0074 
0075 #define TX_RING_MOD_MASK    (TX_RING_SIZE - 1)
0076 #define RX_RING_MOD_MASK    (RX_RING_SIZE - 1)
0077 
0078 #define PKT_BUF_SIZE        (1544)
0079 #define RX_BUFF_SIZE            PKT_BUF_SIZE
0080 #define TX_BUFF_SIZE            PKT_BUF_SIZE
0081 
0082 /* Layout of the Lance's RAM Buffer */
0083 
0084 struct lance_init_block {
0085     unsigned short mode;        /* Pre-set mode (reg. 15) */
0086     unsigned char phys_addr[6];     /* Physical ethernet address */
0087     unsigned filter[2];     /* Multicast filter. */
0088 
0089     /* Receive and transmit ring base, along with extra bits. */
0090     unsigned short rx_ptr;      /* receive descriptor addr */
0091     unsigned short rx_len;      /* receive len and high addr */
0092     unsigned short tx_ptr;      /* transmit descriptor addr */
0093     unsigned short tx_len;      /* transmit len and high addr */
0094 
0095     /* The Tx and Rx ring entries must aligned on 8-byte boundaries. */
0096     struct lance_rx_desc brx_ring[RX_RING_SIZE];
0097     struct lance_tx_desc btx_ring[TX_RING_SIZE];
0098 
0099     char rx_buf[RX_RING_SIZE][RX_BUFF_SIZE];
0100     char tx_buf[TX_RING_SIZE][TX_BUFF_SIZE];
0101 };
0102 
0103 /* Private Device Data */
0104 
0105 struct lance_private {
0106     char *name;
0107     volatile struct lance_regs *ll;
0108     volatile struct lance_init_block *init_block;       /* Hosts view */
0109     volatile struct lance_init_block *lance_init_block; /* Lance view */
0110 
0111     int rx_new, tx_new;
0112     int rx_old, tx_old;
0113 
0114     int lance_log_rx_bufs, lance_log_tx_bufs;
0115     int rx_ring_mod_mask, tx_ring_mod_mask;
0116 
0117     int tpe;              /* cable-selection is TPE */
0118     int auto_select;          /* cable-selection by carrier */
0119     unsigned short busmaster_regval;
0120 
0121     struct timer_list         multicast_timer;
0122     struct net_device     *dev;
0123 };
0124 
0125 #define LANCE_ADDR(x) ((int)(x) & ~0xff000000)
0126 
0127 /* Load the CSR registers */
0128 static void load_csrs(struct lance_private *lp)
0129 {
0130     volatile struct lance_regs *ll = lp->ll;
0131     volatile struct lance_init_block *aib = lp->lance_init_block;
0132     int leptr = LANCE_ADDR(aib);
0133 
0134     ll->rap = LE_CSR1;
0135     ll->rdp = (leptr & 0xFFFF);
0136     ll->rap = LE_CSR2;
0137     ll->rdp = leptr >> 16;
0138     ll->rap = LE_CSR3;
0139     ll->rdp = lp->busmaster_regval;
0140 
0141     /* Point back to csr0 */
0142     ll->rap = LE_CSR0;
0143 }
0144 
0145 /* Setup the Lance Rx and Tx rings */
0146 static void lance_init_ring(struct net_device *dev)
0147 {
0148     struct lance_private *lp = netdev_priv(dev);
0149     volatile struct lance_init_block *ib = lp->init_block;
0150     volatile struct lance_init_block *aib = lp->lance_init_block;
0151                     /* for LANCE_ADDR computations */
0152     int leptr;
0153     int i;
0154 
0155     /* Lock out other processes while setting up hardware */
0156     netif_stop_queue(dev);
0157     lp->rx_new = lp->tx_new = 0;
0158     lp->rx_old = lp->tx_old = 0;
0159 
0160     ib->mode = 0;
0161 
0162     /* Copy the ethernet address to the lance init block
0163      * Note that on the sparc you need to swap the ethernet address.
0164      */
0165     ib->phys_addr[0] = dev->dev_addr[1];
0166     ib->phys_addr[1] = dev->dev_addr[0];
0167     ib->phys_addr[2] = dev->dev_addr[3];
0168     ib->phys_addr[3] = dev->dev_addr[2];
0169     ib->phys_addr[4] = dev->dev_addr[5];
0170     ib->phys_addr[5] = dev->dev_addr[4];
0171 
0172     /* Setup the Tx ring entries */
0173     netdev_dbg(dev, "TX rings:\n");
0174     for (i = 0; i <= 1 << lp->lance_log_tx_bufs; i++) {
0175         leptr = LANCE_ADDR(&aib->tx_buf[i][0]);
0176         ib->btx_ring[i].tmd0      = leptr;
0177         ib->btx_ring[i].tmd1_hadr = leptr >> 16;
0178         ib->btx_ring[i].tmd1_bits = 0;
0179         ib->btx_ring[i].length    = 0xf000; /* The ones required by tmd2 */
0180         ib->btx_ring[i].misc      = 0;
0181         if (i < 3)
0182             netdev_dbg(dev, "%d: 0x%08x\n", i, leptr);
0183     }
0184 
0185     /* Setup the Rx ring entries */
0186     netdev_dbg(dev, "RX rings:\n");
0187     for (i = 0; i < 1 << lp->lance_log_rx_bufs; i++) {
0188         leptr = LANCE_ADDR(&aib->rx_buf[i][0]);
0189 
0190         ib->brx_ring[i].rmd0      = leptr;
0191         ib->brx_ring[i].rmd1_hadr = leptr >> 16;
0192         ib->brx_ring[i].rmd1_bits = LE_R1_OWN;
0193         ib->brx_ring[i].length    = -RX_BUFF_SIZE | 0xf000;
0194         ib->brx_ring[i].mblength  = 0;
0195         if (i < 3)
0196             netdev_dbg(dev, "%d: 0x%08x\n", i, leptr);
0197     }
0198 
0199     /* Setup the initialization block */
0200 
0201     /* Setup rx descriptor pointer */
0202     leptr = LANCE_ADDR(&aib->brx_ring);
0203     ib->rx_len = (lp->lance_log_rx_bufs << 13) | (leptr >> 16);
0204     ib->rx_ptr = leptr;
0205     netdev_dbg(dev, "RX ptr: %08x\n", leptr);
0206 
0207     /* Setup tx descriptor pointer */
0208     leptr = LANCE_ADDR(&aib->btx_ring);
0209     ib->tx_len = (lp->lance_log_tx_bufs << 13) | (leptr >> 16);
0210     ib->tx_ptr = leptr;
0211     netdev_dbg(dev, "TX ptr: %08x\n", leptr);
0212 
0213     /* Clear the multicast filter */
0214     ib->filter[0] = 0;
0215     ib->filter[1] = 0;
0216 }
0217 
0218 static int init_restart_lance(struct lance_private *lp)
0219 {
0220     volatile struct lance_regs *ll = lp->ll;
0221     int i;
0222 
0223     ll->rap = LE_CSR0;
0224     ll->rdp = LE_C0_INIT;
0225 
0226     /* Wait for the lance to complete initialization */
0227     for (i = 0; (i < 100) && !(ll->rdp & (LE_C0_ERR | LE_C0_IDON)); i++)
0228         barrier();
0229     if ((i == 100) || (ll->rdp & LE_C0_ERR)) {
0230         pr_err("unopened after %d ticks, csr0=%04x\n", i, ll->rdp);
0231         return -EIO;
0232     }
0233 
0234     /* Clear IDON by writing a "1", enable interrupts and start lance */
0235     ll->rdp = LE_C0_IDON;
0236     ll->rdp = LE_C0_INEA | LE_C0_STRT;
0237 
0238     return 0;
0239 }
0240 
0241 static int lance_rx(struct net_device *dev)
0242 {
0243     struct lance_private *lp = netdev_priv(dev);
0244     volatile struct lance_init_block *ib = lp->init_block;
0245     volatile struct lance_regs *ll = lp->ll;
0246     volatile struct lance_rx_desc *rd;
0247     unsigned char bits;
0248 
0249 #ifdef TEST_HITS
0250     int i;
0251     char buf[RX_RING_SIZE + 1];
0252 
0253     for (i = 0; i < RX_RING_SIZE; i++) {
0254         char r1_own = ib->brx_ring[i].rmd1_bits & LE_R1_OWN;
0255         if (i == lp->rx_new)
0256             buf[i] = r1_own ? '_' : 'X';
0257         else
0258             buf[i] = r1_own ? '.' : '1';
0259     }
0260     buf[RX_RING_SIZE] = 0;
0261 
0262     pr_debug("RxRing TestHits: [%s]\n", buf);
0263 #endif
0264 
0265     ll->rdp = LE_C0_RINT | LE_C0_INEA;
0266     for (rd = &ib->brx_ring[lp->rx_new];
0267          !((bits = rd->rmd1_bits) & LE_R1_OWN);
0268          rd = &ib->brx_ring[lp->rx_new]) {
0269 
0270         /* We got an incomplete frame? */
0271         if ((bits & LE_R1_POK) != LE_R1_POK) {
0272             dev->stats.rx_over_errors++;
0273             dev->stats.rx_errors++;
0274             continue;
0275         } else if (bits & LE_R1_ERR) {
0276             /* Count only the end frame as a rx error,
0277              * not the beginning
0278              */
0279             if (bits & LE_R1_BUF)
0280                 dev->stats.rx_fifo_errors++;
0281             if (bits & LE_R1_CRC)
0282                 dev->stats.rx_crc_errors++;
0283             if (bits & LE_R1_OFL)
0284                 dev->stats.rx_over_errors++;
0285             if (bits & LE_R1_FRA)
0286                 dev->stats.rx_frame_errors++;
0287             if (bits & LE_R1_EOP)
0288                 dev->stats.rx_errors++;
0289         } else {
0290             int len = (rd->mblength & 0xfff) - 4;
0291             struct sk_buff *skb = netdev_alloc_skb(dev, len + 2);
0292 
0293             if (!skb) {
0294                 dev->stats.rx_dropped++;
0295                 rd->mblength = 0;
0296                 rd->rmd1_bits = LE_R1_OWN;
0297                 lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask;
0298                 return 0;
0299             }
0300 
0301             skb_reserve(skb, 2);        /* 16 byte align */
0302             skb_put(skb, len);      /* make room */
0303             skb_copy_to_linear_data(skb,
0304                  (unsigned char *)&ib->rx_buf[lp->rx_new][0],
0305                  len);
0306             skb->protocol = eth_type_trans(skb, dev);
0307             netif_rx(skb);
0308             dev->stats.rx_packets++;
0309             dev->stats.rx_bytes += len;
0310         }
0311 
0312         /* Return the packet to the pool */
0313         rd->mblength = 0;
0314         rd->rmd1_bits = LE_R1_OWN;
0315         lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask;
0316     }
0317     return 0;
0318 }
0319 
0320 static int lance_tx(struct net_device *dev)
0321 {
0322     struct lance_private *lp = netdev_priv(dev);
0323     volatile struct lance_init_block *ib = lp->init_block;
0324     volatile struct lance_regs *ll = lp->ll;
0325     volatile struct lance_tx_desc *td;
0326     int i, j;
0327     int status;
0328 
0329     /* csr0 is 2f3 */
0330     ll->rdp = LE_C0_TINT | LE_C0_INEA;
0331     /* csr0 is 73 */
0332 
0333     j = lp->tx_old;
0334     for (i = j; i != lp->tx_new; i = j) {
0335         td = &ib->btx_ring[i];
0336 
0337         /* If we hit a packet not owned by us, stop */
0338         if (td->tmd1_bits & LE_T1_OWN)
0339             break;
0340 
0341         if (td->tmd1_bits & LE_T1_ERR) {
0342             status = td->misc;
0343 
0344             dev->stats.tx_errors++;
0345             if (status & LE_T3_RTY)
0346                 dev->stats.tx_aborted_errors++;
0347             if (status & LE_T3_LCOL)
0348                 dev->stats.tx_window_errors++;
0349 
0350             if (status & LE_T3_CLOS) {
0351                 dev->stats.tx_carrier_errors++;
0352                 if (lp->auto_select) {
0353                     lp->tpe = 1 - lp->tpe;
0354                     netdev_err(dev, "Carrier Lost, trying %s\n",
0355                            lp->tpe ? "TPE" : "AUI");
0356                     /* Stop the lance */
0357                     ll->rap = LE_CSR0;
0358                     ll->rdp = LE_C0_STOP;
0359                     lance_init_ring(dev);
0360                     load_csrs(lp);
0361                     init_restart_lance(lp);
0362                     return 0;
0363                 }
0364             }
0365 
0366             /* buffer errors and underflows turn off
0367              * the transmitter, so restart the adapter
0368              */
0369             if (status & (LE_T3_BUF | LE_T3_UFL)) {
0370                 dev->stats.tx_fifo_errors++;
0371 
0372                 netdev_err(dev, "Tx: ERR_BUF|ERR_UFL, restarting\n");
0373                 /* Stop the lance */
0374                 ll->rap = LE_CSR0;
0375                 ll->rdp = LE_C0_STOP;
0376                 lance_init_ring(dev);
0377                 load_csrs(lp);
0378                 init_restart_lance(lp);
0379                 return 0;
0380             }
0381         } else if ((td->tmd1_bits & LE_T1_POK) == LE_T1_POK) {
0382             /* So we don't count the packet more than once. */
0383             td->tmd1_bits &= ~(LE_T1_POK);
0384 
0385             /* One collision before packet was sent. */
0386             if (td->tmd1_bits & LE_T1_EONE)
0387                 dev->stats.collisions++;
0388 
0389             /* More than one collision, be optimistic. */
0390             if (td->tmd1_bits & LE_T1_EMORE)
0391                 dev->stats.collisions += 2;
0392 
0393             dev->stats.tx_packets++;
0394         }
0395 
0396         j = (j + 1) & lp->tx_ring_mod_mask;
0397     }
0398     lp->tx_old = j;
0399     ll->rdp = LE_C0_TINT | LE_C0_INEA;
0400     return 0;
0401 }
0402 
0403 static int lance_tx_buffs_avail(struct lance_private *lp)
0404 {
0405     if (lp->tx_old <= lp->tx_new)
0406         return lp->tx_old + lp->tx_ring_mod_mask - lp->tx_new;
0407     return lp->tx_old - lp->tx_new - 1;
0408 }
0409 
0410 static irqreturn_t lance_interrupt(int irq, void *dev_id)
0411 {
0412     struct net_device *dev = dev_id;
0413     struct lance_private *lp = netdev_priv(dev);
0414     volatile struct lance_regs *ll = lp->ll;
0415     int csr0;
0416 
0417     ll->rap = LE_CSR0;      /* LANCE Controller Status */
0418     csr0 = ll->rdp;
0419 
0420     if (!(csr0 & LE_C0_INTR))   /* Check if any interrupt has */
0421         return IRQ_NONE;    /* been generated by the Lance. */
0422 
0423     /* Acknowledge all the interrupt sources ASAP */
0424     ll->rdp = csr0 & ~(LE_C0_INEA | LE_C0_TDMD | LE_C0_STOP | LE_C0_STRT |
0425                LE_C0_INIT);
0426 
0427     if (csr0 & LE_C0_ERR) {
0428         /* Clear the error condition */
0429         ll->rdp = LE_C0_BABL | LE_C0_ERR | LE_C0_MISS | LE_C0_INEA;
0430     }
0431 
0432     if (csr0 & LE_C0_RINT)
0433         lance_rx(dev);
0434 
0435     if (csr0 & LE_C0_TINT)
0436         lance_tx(dev);
0437 
0438     /* Log misc errors. */
0439     if (csr0 & LE_C0_BABL)
0440         dev->stats.tx_errors++;       /* Tx babble. */
0441     if (csr0 & LE_C0_MISS)
0442         dev->stats.rx_errors++;       /* Missed a Rx frame. */
0443     if (csr0 & LE_C0_MERR) {
0444         netdev_err(dev, "Bus master arbitration failure, status %04x\n",
0445                csr0);
0446         /* Restart the chip. */
0447         ll->rdp = LE_C0_STRT;
0448     }
0449 
0450     if (netif_queue_stopped(dev) && lance_tx_buffs_avail(lp) > 0)
0451         netif_wake_queue(dev);
0452 
0453     ll->rap = LE_CSR0;
0454     ll->rdp = (LE_C0_BABL | LE_C0_CERR | LE_C0_MISS | LE_C0_MERR |
0455            LE_C0_IDON | LE_C0_INEA);
0456     return IRQ_HANDLED;
0457 }
0458 
0459 static int lance_open(struct net_device *dev)
0460 {
0461     struct lance_private *lp = netdev_priv(dev);
0462     volatile struct lance_regs *ll = lp->ll;
0463     int ret;
0464 
0465     /* Stop the Lance */
0466     ll->rap = LE_CSR0;
0467     ll->rdp = LE_C0_STOP;
0468 
0469     /* Install the Interrupt handler */
0470     ret = request_irq(IRQ_AMIGA_PORTS, lance_interrupt, IRQF_SHARED,
0471               dev->name, dev);
0472     if (ret)
0473         return ret;
0474 
0475     load_csrs(lp);
0476     lance_init_ring(dev);
0477 
0478     netif_start_queue(dev);
0479 
0480     return init_restart_lance(lp);
0481 }
0482 
0483 static int lance_close(struct net_device *dev)
0484 {
0485     struct lance_private *lp = netdev_priv(dev);
0486     volatile struct lance_regs *ll = lp->ll;
0487 
0488     netif_stop_queue(dev);
0489     del_timer_sync(&lp->multicast_timer);
0490 
0491     /* Stop the card */
0492     ll->rap = LE_CSR0;
0493     ll->rdp = LE_C0_STOP;
0494 
0495     free_irq(IRQ_AMIGA_PORTS, dev);
0496     return 0;
0497 }
0498 
0499 static inline int lance_reset(struct net_device *dev)
0500 {
0501     struct lance_private *lp = netdev_priv(dev);
0502     volatile struct lance_regs *ll = lp->ll;
0503     int status;
0504 
0505     /* Stop the lance */
0506     ll->rap = LE_CSR0;
0507     ll->rdp = LE_C0_STOP;
0508 
0509     load_csrs(lp);
0510 
0511     lance_init_ring(dev);
0512     netif_trans_update(dev); /* prevent tx timeout */
0513     netif_start_queue(dev);
0514 
0515     status = init_restart_lance(lp);
0516     netdev_dbg(dev, "Lance restart=%d\n", status);
0517 
0518     return status;
0519 }
0520 
0521 static void lance_tx_timeout(struct net_device *dev, unsigned int txqueue)
0522 {
0523     struct lance_private *lp = netdev_priv(dev);
0524     volatile struct lance_regs *ll = lp->ll;
0525 
0526     netdev_err(dev, "transmit timed out, status %04x, reset\n", ll->rdp);
0527     lance_reset(dev);
0528     netif_wake_queue(dev);
0529 }
0530 
0531 static netdev_tx_t lance_start_xmit(struct sk_buff *skb,
0532                     struct net_device *dev)
0533 {
0534     struct lance_private *lp = netdev_priv(dev);
0535     volatile struct lance_regs *ll = lp->ll;
0536     volatile struct lance_init_block *ib = lp->init_block;
0537     int entry, skblen;
0538     int status = NETDEV_TX_OK;
0539     unsigned long flags;
0540 
0541     if (skb_padto(skb, ETH_ZLEN))
0542         return NETDEV_TX_OK;
0543     skblen = max_t(unsigned, skb->len, ETH_ZLEN);
0544 
0545     local_irq_save(flags);
0546 
0547     if (!lance_tx_buffs_avail(lp))
0548         goto out_free;
0549 
0550     /* dump the packet */
0551     print_hex_dump_debug("skb->data: ", DUMP_PREFIX_NONE, 16, 1, skb->data,
0552                  64, true);
0553 
0554     entry = lp->tx_new & lp->tx_ring_mod_mask;
0555     ib->btx_ring[entry].length = (-skblen) | 0xf000;
0556     ib->btx_ring[entry].misc = 0;
0557 
0558     skb_copy_from_linear_data(skb, (void *)&ib->tx_buf[entry][0], skblen);
0559 
0560     /* Now, give the packet to the lance */
0561     ib->btx_ring[entry].tmd1_bits = (LE_T1_POK | LE_T1_OWN);
0562     lp->tx_new = (lp->tx_new+1) & lp->tx_ring_mod_mask;
0563     dev->stats.tx_bytes += skblen;
0564 
0565     if (lance_tx_buffs_avail(lp) <= 0)
0566         netif_stop_queue(dev);
0567 
0568     /* Kick the lance: transmit now */
0569     ll->rdp = LE_C0_INEA | LE_C0_TDMD;
0570  out_free:
0571     dev_kfree_skb(skb);
0572 
0573     local_irq_restore(flags);
0574 
0575     return status;
0576 }
0577 
0578 /* taken from the depca driver */
0579 static void lance_load_multicast(struct net_device *dev)
0580 {
0581     struct lance_private *lp = netdev_priv(dev);
0582     volatile struct lance_init_block *ib = lp->init_block;
0583     volatile u16 *mcast_table = (u16 *)&ib->filter;
0584     struct netdev_hw_addr *ha;
0585     u32 crc;
0586 
0587     /* set all multicast bits */
0588     if (dev->flags & IFF_ALLMULTI) {
0589         ib->filter[0] = 0xffffffff;
0590         ib->filter[1] = 0xffffffff;
0591         return;
0592     }
0593     /* clear the multicast filter */
0594     ib->filter[0] = 0;
0595     ib->filter[1] = 0;
0596 
0597     /* Add addresses */
0598     netdev_for_each_mc_addr(ha, dev) {
0599         crc = ether_crc_le(6, ha->addr);
0600         crc = crc >> 26;
0601         mcast_table[crc >> 4] |= 1 << (crc & 0xf);
0602     }
0603 }
0604 
0605 static void lance_set_multicast(struct net_device *dev)
0606 {
0607     struct lance_private *lp = netdev_priv(dev);
0608     volatile struct lance_init_block *ib = lp->init_block;
0609     volatile struct lance_regs *ll = lp->ll;
0610 
0611     if (!netif_running(dev))
0612         return;
0613 
0614     if (lp->tx_old != lp->tx_new) {
0615         mod_timer(&lp->multicast_timer, jiffies + 4);
0616         netif_wake_queue(dev);
0617         return;
0618     }
0619 
0620     netif_stop_queue(dev);
0621 
0622     ll->rap = LE_CSR0;
0623     ll->rdp = LE_C0_STOP;
0624     lance_init_ring(dev);
0625 
0626     if (dev->flags & IFF_PROMISC) {
0627         ib->mode |= LE_MO_PROM;
0628     } else {
0629         ib->mode &= ~LE_MO_PROM;
0630         lance_load_multicast(dev);
0631     }
0632     load_csrs(lp);
0633     init_restart_lance(lp);
0634     netif_wake_queue(dev);
0635 }
0636 
0637 static void lance_set_multicast_retry(struct timer_list *t)
0638 {
0639     struct lance_private *lp = from_timer(lp, t, multicast_timer);
0640 
0641     lance_set_multicast(lp->dev);
0642 }
0643 
0644 static int a2065_init_one(struct zorro_dev *z,
0645               const struct zorro_device_id *ent);
0646 static void a2065_remove_one(struct zorro_dev *z);
0647 
0648 
0649 static const struct zorro_device_id a2065_zorro_tbl[] = {
0650     { ZORRO_PROD_CBM_A2065_1 },
0651     { ZORRO_PROD_CBM_A2065_2 },
0652     { ZORRO_PROD_AMERISTAR_A2065 },
0653     { 0 }
0654 };
0655 MODULE_DEVICE_TABLE(zorro, a2065_zorro_tbl);
0656 
0657 static struct zorro_driver a2065_driver = {
0658     .name       = "a2065",
0659     .id_table   = a2065_zorro_tbl,
0660     .probe      = a2065_init_one,
0661     .remove     = a2065_remove_one,
0662 };
0663 
0664 static const struct net_device_ops lance_netdev_ops = {
0665     .ndo_open       = lance_open,
0666     .ndo_stop       = lance_close,
0667     .ndo_start_xmit     = lance_start_xmit,
0668     .ndo_tx_timeout     = lance_tx_timeout,
0669     .ndo_set_rx_mode    = lance_set_multicast,
0670     .ndo_validate_addr  = eth_validate_addr,
0671     .ndo_set_mac_address    = eth_mac_addr,
0672 };
0673 
0674 static int a2065_init_one(struct zorro_dev *z,
0675               const struct zorro_device_id *ent)
0676 {
0677     struct net_device *dev;
0678     struct lance_private *priv;
0679     unsigned long board = z->resource.start;
0680     unsigned long base_addr = board + A2065_LANCE;
0681     unsigned long mem_start = board + A2065_RAM;
0682     struct resource *r1, *r2;
0683     u8 addr[ETH_ALEN];
0684     u32 serial;
0685     int err;
0686 
0687     r1 = request_mem_region(base_addr, sizeof(struct lance_regs),
0688                 "Am7990");
0689     if (!r1)
0690         return -EBUSY;
0691     r2 = request_mem_region(mem_start, A2065_RAM_SIZE, "RAM");
0692     if (!r2) {
0693         release_mem_region(base_addr, sizeof(struct lance_regs));
0694         return -EBUSY;
0695     }
0696 
0697     dev = alloc_etherdev(sizeof(struct lance_private));
0698     if (dev == NULL) {
0699         release_mem_region(base_addr, sizeof(struct lance_regs));
0700         release_mem_region(mem_start, A2065_RAM_SIZE);
0701         return -ENOMEM;
0702     }
0703 
0704     priv = netdev_priv(dev);
0705 
0706     r1->name = dev->name;
0707     r2->name = dev->name;
0708 
0709     serial = be32_to_cpu(z->rom.er_SerialNumber);
0710     addr[0] = 0x00;
0711     if (z->id != ZORRO_PROD_AMERISTAR_A2065) {  /* Commodore */
0712         addr[1] = 0x80;
0713         addr[2] = 0x10;
0714     } else {                    /* Ameristar */
0715         addr[1] = 0x00;
0716         addr[2] = 0x9f;
0717     }
0718     addr[3] = (serial >> 16) & 0xff;
0719     addr[4] = (serial >> 8) & 0xff;
0720     addr[5] = serial & 0xff;
0721     eth_hw_addr_set(dev, addr);
0722     dev->base_addr = (unsigned long)ZTWO_VADDR(base_addr);
0723     dev->mem_start = (unsigned long)ZTWO_VADDR(mem_start);
0724     dev->mem_end = dev->mem_start + A2065_RAM_SIZE;
0725 
0726     priv->ll = (volatile struct lance_regs *)dev->base_addr;
0727     priv->init_block = (struct lance_init_block *)dev->mem_start;
0728     priv->lance_init_block = (struct lance_init_block *)A2065_RAM;
0729     priv->auto_select = 0;
0730     priv->busmaster_regval = LE_C3_BSWP;
0731 
0732     priv->lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS;
0733     priv->lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS;
0734     priv->rx_ring_mod_mask = RX_RING_MOD_MASK;
0735     priv->tx_ring_mod_mask = TX_RING_MOD_MASK;
0736     priv->dev = dev;
0737 
0738     dev->netdev_ops = &lance_netdev_ops;
0739     dev->watchdog_timeo = 5*HZ;
0740     dev->dma = 0;
0741 
0742     timer_setup(&priv->multicast_timer, lance_set_multicast_retry, 0);
0743 
0744     err = register_netdev(dev);
0745     if (err) {
0746         release_mem_region(base_addr, sizeof(struct lance_regs));
0747         release_mem_region(mem_start, A2065_RAM_SIZE);
0748         free_netdev(dev);
0749         return err;
0750     }
0751     zorro_set_drvdata(z, dev);
0752 
0753     netdev_info(dev, "A2065 at 0x%08lx, Ethernet Address %pM\n",
0754             board, dev->dev_addr);
0755 
0756     return 0;
0757 }
0758 
0759 
0760 static void a2065_remove_one(struct zorro_dev *z)
0761 {
0762     struct net_device *dev = zorro_get_drvdata(z);
0763 
0764     unregister_netdev(dev);
0765     release_mem_region(ZTWO_PADDR(dev->base_addr),
0766                sizeof(struct lance_regs));
0767     release_mem_region(ZTWO_PADDR(dev->mem_start), A2065_RAM_SIZE);
0768     free_netdev(dev);
0769 }
0770 
0771 static int __init a2065_init_module(void)
0772 {
0773     return zorro_register_driver(&a2065_driver);
0774 }
0775 
0776 static void __exit a2065_cleanup_module(void)
0777 {
0778     zorro_unregister_driver(&a2065_driver);
0779 }
0780 
0781 module_init(a2065_init_module);
0782 module_exit(a2065_cleanup_module);
0783 
0784 MODULE_LICENSE("GPL");
[ Source navigation ] [ Diff markup ] [ Identifier search ] [ general search ]

This page was automatically generated by the 2.1.0 LXR engine.

The LXR team
Valid CSS 2.1! Valid HTML 4.01!