drivers/net/ethernet/amd/mvme147.c

   1 /* mvme147.c  : the  Linux/mvme147/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 #include <linux/gfp.h>
  18 /* Used for the temporal inet entries and routing */
  19 #include <linux/socket.h>
  20 #include <linux/route.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 #include <asm/mvme147hw.h>
  28
  29 /* We have 32K of RAM for the init block and buffers. This places
  30  * an upper limit on the number of buffers we can use. NetBSD uses 8 Rx
  31  * buffers and 2 Tx buffers, it takes (8 + 2) * 1544 bytes.
  32  */
  33 #define LANCE_LOG_TX_BUFFERS 1
  34 #define LANCE_LOG_RX_BUFFERS 3
  35
  36 #include "7990.h"                                 /* use generic LANCE code */
  37
  38 /* Our private data structure */
  39 struct m147lance_private {
  40         struct lance_private lance;
  41         unsigned long ram;
  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 m147lance_open(struct net_device *dev);
  50 static int m147lance_close(struct net_device *dev);
  51 static void m147lance_writerap(struct lance_private *lp, unsigned short value);
  52 static void m147lance_writerdp(struct lance_private *lp, unsigned short value);
  53 static unsigned short m147lance_readrdp(struct lance_private *lp);
  54
  55 typedef void (*writerap_t)(void *, unsigned short);
  56 typedef void (*writerdp_t)(void *, unsigned short);
  57 typedef unsigned short (*readrdp_t)(void *);
  58
  59 static const struct net_device_ops lance_netdev_ops = {
  60         .ndo_open               = m147lance_open,
  61         .ndo_stop               = m147lance_close,
  62         .ndo_start_xmit         = lance_start_xmit,
  63         .ndo_set_rx_mode        = lance_set_multicast,
  64         .ndo_tx_timeout         = lance_tx_timeout,
  65         .ndo_validate_addr      = eth_validate_addr,
  66         .ndo_set_mac_address    = eth_mac_addr,
  67 };
  68
  69 /* Initialise the one and only on-board 7990 */
  70 struct net_device * __init mvme147lance_probe(int unit)
  71 {
  72         struct net_device *dev;
  73         static int called;
  74         static const char name[] = "MVME147 LANCE";
  75         struct m147lance_private *lp;
  76         u_long *addr;
  77         u_long address;
  78         int err;
  79
  80         if (!MACH_IS_MVME147 || called)
  81                 return ERR_PTR(-ENODEV);
  82         called++;
  83
  84         dev = alloc_etherdev(sizeof(struct m147lance_private));
  85         if (!dev)
  86                 return ERR_PTR(-ENOMEM);
  87
  88         if (unit >= 0)
  89                 sprintf(dev->name, "eth%d", unit);
  90
  91         /* Fill the dev fields */
  92         dev->base_addr = (unsigned long)MVME147_LANCE_BASE;
  93         dev->netdev_ops = &lance_netdev_ops;
  94         dev->dma = 0;
  95
  96         addr = (u_long *)ETHERNET_ADDRESS;
  97         address = *addr;
  98         dev->dev_addr[0] = 0x08;
  99         dev->dev_addr[1] = 0x00;
 100         dev->dev_addr[2] = 0x3e;
 101         address = address >> 8;
 102         dev->dev_addr[5] = address&0xff;
 103         address = address >> 8;
 104         dev->dev_addr[4] = address&0xff;
 105         address = address >> 8;
 106         dev->dev_addr[3] = address&0xff;
 107
 108         printk("%s: MVME147 at 0x%08lx, irq %d, Hardware Address %pM\n",
 109                dev->name, dev->base_addr, MVME147_LANCE_IRQ,
 110                dev->dev_addr);
 111
 112         lp = netdev_priv(dev);
 113         lp->ram = __get_dma_pages(GFP_ATOMIC, 3);       /* 32K */
 114         if (!lp->ram) {
 115                 printk("%s: No memory for LANCE buffers\n", dev->name);
 116                 free_netdev(dev);
 117                 return ERR_PTR(-ENOMEM);
 118         }
 119
 120         lp->lance.name = name;
 121         lp->lance.base = dev->base_addr;
 122         lp->lance.init_block = (struct lance_init_block *)(lp->ram); /* CPU addr */
 123         lp->lance.lance_init_block = (struct lance_init_block *)(lp->ram);                 /* LANCE addr of same RAM */
 124         lp->lance.busmaster_regval = LE_C3_BSWP;        /* we're bigendian */
 125         lp->lance.irq = MVME147_LANCE_IRQ;
 126         lp->lance.writerap = (writerap_t)m147lance_writerap;
 127         lp->lance.writerdp = (writerdp_t)m147lance_writerdp;
 128         lp->lance.readrdp = (readrdp_t)m147lance_readrdp;
 129         lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS;
 130         lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS;
 131         lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK;
 132         lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK;
 133
 134         err = register_netdev(dev);
 135         if (err) {
 136                 free_pages(lp->ram, 3);
 137                 free_netdev(dev);
 138                 return ERR_PTR(err);
 139         }
 140
 141         return dev;
 142 }
 143
 144 static void m147lance_writerap(struct lance_private *lp, unsigned short value)
 145 {
 146         out_be16(lp->base + LANCE_RAP, value);
 147 }
 148
 149 static void m147lance_writerdp(struct lance_private *lp, unsigned short value)
 150 {
 151         out_be16(lp->base + LANCE_RDP, value);
 152 }
 153
 154 static unsigned short m147lance_readrdp(struct lance_private *lp)
 155 {
 156         return in_be16(lp->base + LANCE_RDP);
 157 }
 158
 159 static int m147lance_open(struct net_device *dev)
 160 {
 161         int status;
 162
 163         status = lance_open(dev);                 /* call generic lance open code */
 164         if (status)
 165                 return status;
 166         /* enable interrupts at board level. */
 167         m147_pcc->lan_cntrl = 0;       /* clear the interrupts (if any) */
 168         m147_pcc->lan_cntrl = 0x08 | 0x04;     /* Enable irq 4 */
 169
 170         return 0;
 171 }
 172
 173 static int m147lance_close(struct net_device *dev)
 174 {
 175         /* disable interrupts at boardlevel */
 176         m147_pcc->lan_cntrl = 0x0; /* disable interrupts */
 177         lance_close(dev);
 178         return 0;
 179 }
 180
 181 #ifdef MODULE
 182 MODULE_LICENSE("GPL");
 183
 184 static struct net_device *dev_mvme147_lance;
 185 int __init init_module(void)
 186 {
 187         dev_mvme147_lance = mvme147lance_probe(-1);
 188         return PTR_ERR_OR_ZERO(dev_mvme147_lance);
 189 }
 190
 191 void __exit cleanup_module(void)
 192 {
 193         struct m147lance_private *lp = netdev_priv(dev_mvme147_lance);
 194         unregister_netdev(dev_mvme147_lance);
 195         free_pages(lp->ram, 3);
 196         free_netdev(dev_mvme147_lance);
 197 }
 198
 199 #endif /* MODULE */