200 lines
5.6 KiB
C
200 lines
5.6 KiB
C
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/* mvme147.c : the Linux/mvme147/lance ethernet driver
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*
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* Copyright (C) 05/1998 Peter Maydell <pmaydell@chiark.greenend.org.uk>
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* Based on the Sun Lance driver and the NetBSD HP Lance driver
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* Uses the generic 7990.c LANCE code.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/interrupt.h>
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#include <linux/ioport.h>
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#include <linux/string.h>
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/errno.h>
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#include <linux/gfp.h>
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/* Used for the temporal inet entries and routing */
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#include <linux/socket.h>
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#include <linux/route.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <asm/io.h>
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#include <asm/pgtable.h>
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#include <asm/mvme147hw.h>
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/* We have 32K of RAM for the init block and buffers. This places
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* an upper limit on the number of buffers we can use. NetBSD uses 8 Rx
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* buffers and 2 Tx buffers, it takes (8 + 2) * 1544 bytes.
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*/
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#define LANCE_LOG_TX_BUFFERS 1
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#define LANCE_LOG_RX_BUFFERS 3
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#include "7990.h" /* use generic LANCE code */
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/* Our private data structure */
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struct m147lance_private {
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struct lance_private lance;
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unsigned long ram;
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};
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/* function prototypes... This is easy because all the grot is in the
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* generic LANCE support. All we have to support is probing for boards,
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* plus board-specific init, open and close actions.
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* Oh, and we need to tell the generic code how to read and write LANCE registers...
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*/
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static int m147lance_open(struct net_device *dev);
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static int m147lance_close(struct net_device *dev);
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static void m147lance_writerap(struct lance_private *lp, unsigned short value);
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static void m147lance_writerdp(struct lance_private *lp, unsigned short value);
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static unsigned short m147lance_readrdp(struct lance_private *lp);
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typedef void (*writerap_t)(void *, unsigned short);
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typedef void (*writerdp_t)(void *, unsigned short);
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typedef unsigned short (*readrdp_t)(void *);
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static const struct net_device_ops lance_netdev_ops = {
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.ndo_open = m147lance_open,
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.ndo_stop = m147lance_close,
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.ndo_start_xmit = lance_start_xmit,
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.ndo_set_rx_mode = lance_set_multicast,
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.ndo_tx_timeout = lance_tx_timeout,
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.ndo_validate_addr = eth_validate_addr,
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.ndo_set_mac_address = eth_mac_addr,
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};
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/* Initialise the one and only on-board 7990 */
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struct net_device * __init mvme147lance_probe(int unit)
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{
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struct net_device *dev;
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static int called;
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static const char name[] = "MVME147 LANCE";
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struct m147lance_private *lp;
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u_long *addr;
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u_long address;
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int err;
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if (!MACH_IS_MVME147 || called)
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return ERR_PTR(-ENODEV);
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called++;
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dev = alloc_etherdev(sizeof(struct m147lance_private));
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if (!dev)
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return ERR_PTR(-ENOMEM);
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if (unit >= 0)
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sprintf(dev->name, "eth%d", unit);
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/* Fill the dev fields */
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dev->base_addr = (unsigned long)MVME147_LANCE_BASE;
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dev->netdev_ops = &lance_netdev_ops;
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dev->dma = 0;
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addr = (u_long *)ETHERNET_ADDRESS;
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address = *addr;
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dev->dev_addr[0] = 0x08;
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dev->dev_addr[1] = 0x00;
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dev->dev_addr[2] = 0x3e;
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address = address >> 8;
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dev->dev_addr[5] = address&0xff;
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address = address >> 8;
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dev->dev_addr[4] = address&0xff;
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address = address >> 8;
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dev->dev_addr[3] = address&0xff;
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printk("%s: MVME147 at 0x%08lx, irq %d, Hardware Address %pM\n",
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dev->name, dev->base_addr, MVME147_LANCE_IRQ,
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dev->dev_addr);
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lp = netdev_priv(dev);
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lp->ram = __get_dma_pages(GFP_ATOMIC, 3); /* 32K */
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if (!lp->ram) {
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printk("%s: No memory for LANCE buffers\n", dev->name);
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free_netdev(dev);
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return ERR_PTR(-ENOMEM);
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}
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lp->lance.name = name;
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lp->lance.base = dev->base_addr;
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lp->lance.init_block = (struct lance_init_block *)(lp->ram); /* CPU addr */
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lp->lance.lance_init_block = (struct lance_init_block *)(lp->ram); /* LANCE addr of same RAM */
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lp->lance.busmaster_regval = LE_C3_BSWP; /* we're bigendian */
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lp->lance.irq = MVME147_LANCE_IRQ;
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lp->lance.writerap = (writerap_t)m147lance_writerap;
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lp->lance.writerdp = (writerdp_t)m147lance_writerdp;
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lp->lance.readrdp = (readrdp_t)m147lance_readrdp;
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lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS;
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lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS;
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lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK;
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lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK;
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err = register_netdev(dev);
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if (err) {
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free_pages(lp->ram, 3);
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free_netdev(dev);
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return ERR_PTR(err);
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}
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return dev;
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}
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static void m147lance_writerap(struct lance_private *lp, unsigned short value)
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{
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out_be16(lp->base + LANCE_RAP, value);
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}
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static void m147lance_writerdp(struct lance_private *lp, unsigned short value)
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{
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out_be16(lp->base + LANCE_RDP, value);
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}
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static unsigned short m147lance_readrdp(struct lance_private *lp)
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{
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return in_be16(lp->base + LANCE_RDP);
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}
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static int m147lance_open(struct net_device *dev)
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{
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int status;
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status = lance_open(dev); /* call generic lance open code */
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if (status)
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return status;
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/* enable interrupts at board level. */
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m147_pcc->lan_cntrl = 0; /* clear the interrupts (if any) */
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m147_pcc->lan_cntrl = 0x08 | 0x04; /* Enable irq 4 */
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return 0;
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}
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static int m147lance_close(struct net_device *dev)
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{
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/* disable interrupts at boardlevel */
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m147_pcc->lan_cntrl = 0x0; /* disable interrupts */
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lance_close(dev);
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return 0;
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}
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#ifdef MODULE
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MODULE_LICENSE("GPL");
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static struct net_device *dev_mvme147_lance;
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int __init init_module(void)
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{
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dev_mvme147_lance = mvme147lance_probe(-1);
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return PTR_ERR_OR_ZERO(dev_mvme147_lance);
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}
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void __exit cleanup_module(void)
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{
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struct m147lance_private *lp = netdev_priv(dev_mvme147_lance);
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unregister_netdev(dev_mvme147_lance);
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free_pages(lp->ram, 3);
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free_netdev(dev_mvme147_lance);
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}
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#endif /* MODULE */
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