drivers/net/ethernet/amd/hplance.c

   1 /* hplance.c  : the  Linux/hp300/lance ethernet driver
   2  *
   3  * Copyright (C) 05/1998 Peter Maydell <pmaydell@chiark.greenend.org.uk>
   4  * Based on the Sun Lance driver and the NetBSD HP Lance driver
   5  * Uses the generic 7990.c LANCE code.
   6  */
   7
   8 #include <linux/module.h>
   9 #include <linux/kernel.h>
  10 #include <linux/types.h>
  11 #include <linux/interrupt.h>
  12 #include <linux/ioport.h>
  13 #include <linux/string.h>
  14 #include <linux/delay.h>
  15 #include <linux/init.h>
  16 #include <linux/errno.h>
  17 /* Used for the temporal inet entries and routing */
  18 #include <linux/socket.h>
  19 #include <linux/route.h>
  20 #include <linux/dio.h>
  21 #include <linux/netdevice.h>
  22 #include <linux/etherdevice.h>
  23 #include <linux/skbuff.h>
  24
  25 #include <asm/io.h>
  26 #include <asm/pgtable.h>
  27
  28 #include "hplance.h"
  29
  30 /* We have 16834 bytes of RAM for the init block and buffers. This places
  31  * an upper limit on the number of buffers we can use. NetBSD uses 8 Rx
  32  * buffers and 2 Tx buffers.
  33  */
  34 #define LANCE_LOG_TX_BUFFERS 1
  35 #define LANCE_LOG_RX_BUFFERS 3
  36
  37 #include "7990.h"                                 /* use generic LANCE code */
  38
  39 /* Our private data structure */
  40 struct hplance_private {
  41         struct lance_private lance;
  42 };
  43
  44 /* function prototypes... This is easy because all the grot is in the
  45  * generic LANCE support. All we have to support is probing for boards,
  46  * plus board-specific init, open and close actions.
  47  * Oh, and we need to tell the generic code how to read and write LANCE registers...
  48  */
  49 static int __devinit hplance_init_one(struct dio_dev *d,
  50                                 const struct dio_device_id *ent);
  51 static void __devinit hplance_init(struct net_device *dev,
  52                                 struct dio_dev *d);
  53 static void __devexit hplance_remove_one(struct dio_dev *d);
  54 static void hplance_writerap(void *priv, unsigned short value);
  55 static void hplance_writerdp(void *priv, unsigned short value);
  56 static unsigned short hplance_readrdp(void *priv);
  57 static int hplance_open(struct net_device *dev);
  58 static int hplance_close(struct net_device *dev);
  59
  60 static struct dio_device_id hplance_dio_tbl[] = {
  61         { DIO_ID_LAN },
  62         { 0 }
  63 };
  64
  65 static struct dio_driver hplance_driver = {
  66         .name      = "hplance",
  67         .id_table  = hplance_dio_tbl,
  68         .probe     = hplance_init_one,
  69         .remove    = __devexit_p(hplance_remove_one),
  70 };
  71
  72 static const struct net_device_ops hplance_netdev_ops = {
  73         .ndo_open               = hplance_open,
  74         .ndo_stop               = hplance_close,
  75         .ndo_start_xmit         = lance_start_xmit,
  76         .ndo_set_rx_mode        = lance_set_multicast,
  77         .ndo_change_mtu         = eth_change_mtu,
  78         .ndo_validate_addr      = eth_validate_addr,
  79         .ndo_set_mac_address    = eth_mac_addr,
  80 #ifdef CONFIG_NET_POLL_CONTROLLER
  81         .ndo_poll_controller    = lance_poll,
  82 #endif
  83 };
  84
  85 /* Find all the HP Lance boards and initialise them... */
  86 static int __devinit hplance_init_one(struct dio_dev *d,
  87                                 const struct dio_device_id *ent)
  88 {
  89         struct net_device *dev;
  90         int err = -ENOMEM;
  91
  92         dev = alloc_etherdev(sizeof(struct hplance_private));
  93         if (!dev)
  94                 goto out;
  95
  96         err = -EBUSY;
  97         if (!request_mem_region(dio_resource_start(d),
  98                                 dio_resource_len(d), d->name))
  99                 goto out_free_netdev;
 100
 101         hplance_init(dev, d);
 102         err = register_netdev(dev);
 103         if (err)
 104                 goto out_release_mem_region;
 105
 106         dio_set_drvdata(d, dev);
 107
 108         printk(KERN_INFO "%s: %s; select code %d, addr %pM, irq %d\n",
 109                dev->name, d->name, d->scode, dev->dev_addr, d->ipl);
 110
 111         return 0;
 112
 113  out_release_mem_region:
 114         release_mem_region(dio_resource_start(d), dio_resource_len(d));
 115  out_free_netdev:
 116         free_netdev(dev);
 117  out:
 118         return err;
 119 }
 120
 121 static void __devexit hplance_remove_one(struct dio_dev *d)
 122 {
 123         struct net_device *dev = dio_get_drvdata(d);
 124
 125         unregister_netdev(dev);
 126         release_mem_region(dio_resource_start(d), dio_resource_len(d));
 127         free_netdev(dev);
 128 }
 129
 130 /* Initialise a single lance board at the given DIO device */
 131 static void __devinit hplance_init(struct net_device *dev, struct dio_dev *d)
 132 {
 133         unsigned long va = (d->resource.start + DIO_VIRADDRBASE);
 134         struct hplance_private *lp;
 135         int i;
 136
 137         /* reset the board */
 138         out_8(va+DIO_IDOFF, 0xff);
 139         udelay(100);                              /* ariba! ariba! udelay! udelay! */
 140
 141         /* Fill the dev fields */
 142         dev->base_addr = va;
 143         dev->netdev_ops = &hplance_netdev_ops;
 144         dev->dma = 0;
 145
 146         for (i=0; i<6; i++) {
 147                 /* The NVRAM holds our ethernet address, one nibble per byte,
 148                  * at bytes NVRAMOFF+1,3,5,7,9...
 149                  */
 150                 dev->dev_addr[i] = ((in_8(va + HPLANCE_NVRAMOFF + i*4 + 1) & 0xF) << 4)
 151                         | (in_8(va + HPLANCE_NVRAMOFF + i*4 + 3) & 0xF);
 152         }
 153
 154         lp = netdev_priv(dev);
 155         lp->lance.name = (char*)d->name;                /* discards const, shut up gcc */
 156         lp->lance.base = va;
 157         lp->lance.init_block = (struct lance_init_block *)(va + HPLANCE_MEMOFF); /* CPU addr */
 158         lp->lance.lance_init_block = NULL;              /* LANCE addr of same RAM */
 159         lp->lance.busmaster_regval = LE_C3_BSWP;        /* we're bigendian */
 160         lp->lance.irq = d->ipl;
 161         lp->lance.writerap = hplance_writerap;
 162         lp->lance.writerdp = hplance_writerdp;
 163         lp->lance.readrdp = hplance_readrdp;
 164         lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS;
 165         lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS;
 166         lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK;
 167         lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK;
 168 }
 169
 170 /* This is disgusting. We have to check the DIO status register for ack every
 171  * time we read or write the LANCE registers.
 172  */
 173 static void hplance_writerap(void *priv, unsigned short value)
 174 {
 175         struct lance_private *lp = (struct lance_private *)priv;
 176         do {
 177                 out_be16(lp->base + HPLANCE_REGOFF + LANCE_RAP, value);
 178         } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
 179 }
 180
 181 static void hplance_writerdp(void *priv, unsigned short value)
 182 {
 183         struct lance_private *lp = (struct lance_private *)priv;
 184         do {
 185                 out_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP, value);
 186         } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
 187 }
 188
 189 static unsigned short hplance_readrdp(void *priv)
 190 {
 191         struct lance_private *lp = (struct lance_private *)priv;
 192         __u16 value;
 193         do {
 194                 value = in_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP);
 195         } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
 196         return value;
 197 }
 198
 199 static int hplance_open(struct net_device *dev)
 200 {
 201         int status;
 202         struct lance_private *lp = netdev_priv(dev);
 203
 204         status = lance_open(dev);                 /* call generic lance open code */
 205         if (status)
 206                 return status;
 207         /* enable interrupts at board level. */
 208         out_8(lp->base + HPLANCE_STATUS, LE_IE);
 209
 210         return 0;
 211 }
 212
 213 static int hplance_close(struct net_device *dev)
 214 {
 215         struct lance_private *lp = netdev_priv(dev);
 216
 217         out_8(lp->base + HPLANCE_STATUS, 0);    /* disable interrupts at boardlevel */
 218         lance_close(dev);
 219         return 0;
 220 }
 221
 222 static int __init hplance_init_module(void)
 223 {
 224         return dio_register_driver(&hplance_driver);
 225 }
 226
 227 static void __exit hplance_cleanup_module(void)
 228 {
 229         dio_unregister_driver(&hplance_driver);
 230 }
 231
 232 module_init(hplance_init_module);
 233 module_exit(hplance_cleanup_module);
 234
 235 MODULE_LICENSE("GPL");