/* mvme147.c : the Linux/mvme147/lance ethernet driver * * Copyright (C) 05/1998 Peter Maydell <pmaydell@chiark.greenend.org.uk> * Based on the Sun Lance driver and the NetBSD HP Lance driver * Uses the generic 7990.c LANCE code. */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/types.h> #include <linux/interrupt.h> #include <linux/ioport.h> #include <linux/slab.h> #include <linux/string.h> #include <linux/delay.h> #include <linux/init.h> #include <linux/errno.h> /* Used for the temporal inet entries and routing */ #include <linux/socket.h> #include <linux/route.h> #include <linux/netdevice.h> #include <linux/etherdevice.h> #include <linux/skbuff.h> #include <asm/system.h> #include <asm/io.h> #include <asm/pgtable.h> #include <asm/mvme147hw.h> /* We have 16834 bytes of RAM for the init block and buffers. This places * an upper limit on the number of buffers we can use. NetBSD uses 8 Rx * buffers and 2 Tx buffers. */ #define LANCE_LOG_TX_BUFFERS 1 #define LANCE_LOG_RX_BUFFERS 3 #include "7990.h" /* use generic LANCE code */ /* Our private data structure */ struct m147lance_private { struct lance_private lance; unsigned long ram; }; /* function prototypes... This is easy because all the grot is in the * generic LANCE support. All we have to support is probing for boards, * plus board-specific init, open and close actions. * Oh, and we need to tell the generic code how to read and write LANCE registers... */ static int m147lance_open(struct net_device *dev); static int m147lance_close(struct net_device *dev); static void m147lance_writerap(struct lance_private *lp, unsigned short value); static void m147lance_writerdp(struct lance_private *lp, unsigned short value); static unsigned short m147lance_readrdp(struct lance_private *lp); typedef void (*writerap_t)(void *, unsigned short); typedef void (*writerdp_t)(void *, unsigned short); typedef unsigned short (*readrdp_t)(void *); static const struct net_device_ops lance_netdev_ops = { .ndo_open = m147lance_open, .ndo_stop = m147lance_close, .ndo_start_xmit = lance_start_xmit, .ndo_set_multicast_list = lance_set_multicast, .ndo_tx_timeout = lance_tx_timeout, .ndo_change_mtu = eth_change_mtu, .ndo_validate_addr = eth_validate_addr, .ndo_set_mac_address = eth_mac_addr, }; /* Initialise the one and only on-board 7990 */ struct net_device * __init mvme147lance_probe(int unit) { struct net_device *dev; static int called; static const char name[] = "MVME147 LANCE"; struct m147lance_private *lp; u_long *addr; u_long address; int err; if (!MACH_IS_MVME147 || called) return ERR_PTR(-ENODEV); called++; dev = alloc_etherdev(sizeof(struct m147lance_private)); if (!dev) return ERR_PTR(-ENOMEM); if (unit >= 0) sprintf(dev->name, "eth%d", unit); /* Fill the dev fields */ dev->base_addr = (unsigned long)MVME147_LANCE_BASE; dev->netdev_ops = &lance_netdev_ops; dev->dma = 0; addr=(u_long *)ETHERNET_ADDRESS; address = *addr; dev->dev_addr[0]=0x08; dev->dev_addr[1]=0x00; dev->dev_addr[2]=0x3e; address=address>>8; dev->dev_addr[5]=address&0xff; address=address>>8; dev->dev_addr[4]=address&0xff; address=address>>8; dev->dev_addr[3]=address&0xff; printk("%s: MVME147 at 0x%08lx, irq %d, " "Hardware Address %pM\n", dev->name, dev->base_addr, MVME147_LANCE_IRQ, dev->dev_addr); lp = netdev_priv(dev); lp->ram = __get_dma_pages(GFP_ATOMIC, 3); /* 16K */ if (!lp->ram) { printk("%s: No memory for LANCE buffers\n", dev->name); free_netdev(dev); return ERR_PTR(-ENOMEM); } lp->lance.name = (char*)name; /* discards const, shut up gcc */ lp->lance.base = dev->base_addr; lp->lance.init_block = (struct lance_init_block *)(lp->ram); /* CPU addr */ lp->lance.lance_init_block = (struct lance_init_block *)(lp->ram); /* LANCE addr of same RAM */ lp->lance.busmaster_regval = LE_C3_BSWP; /* we're bigendian */ lp->lance.irq = MVME147_LANCE_IRQ; lp->lance.writerap = (writerap_t)m147lance_writerap; lp->lance.writerdp = (writerdp_t)m147lance_writerdp; lp->lance.readrdp = (readrdp_t)m147lance_readrdp; lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS; lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS; lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK; lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK; err = register_netdev(dev); if (err) { free_pages(lp->ram, 3); free_netdev(dev); return ERR_PTR(err); } return dev; } static void m147lance_writerap(struct lance_private *lp, unsigned short value) { out_be16(lp->base + LANCE_RAP, value); } static void m147lance_writerdp(struct lance_private *lp, unsigned short value) { out_be16(lp->base + LANCE_RDP, value); } static unsigned short m147lance_readrdp(struct lance_private *lp) { return in_be16(lp->base + LANCE_RDP); } static int m147lance_open(struct net_device *dev) { int status; status = lance_open(dev); /* call generic lance open code */ if (status) return status; /* enable interrupts at board level. */ m147_pcc->lan_cntrl=0; /* clear the interrupts (if any) */ m147_pcc->lan_cntrl=0x08 | 0x04; /* Enable irq 4 */ return 0; } static int m147lance_close(struct net_device *dev) { /* disable interrupts at boardlevel */ m147_pcc->lan_cntrl=0x0; /* disable interrupts */ lance_close(dev); return 0; } #ifdef MODULE MODULE_LICENSE("GPL"); static struct net_device *dev_mvme147_lance; int __init init_module(void) { dev_mvme147_lance = mvme147lance_probe(-1); if (IS_ERR(dev_mvme147_lance)) return PTR_ERR(dev_mvme147_lance); return 0; } void __exit cleanup_module(void) { struct m147lance_private *lp = netdev_priv(dev_mvme147_lance); unregister_netdev(dev_mvme147_lance); free_pages(lp->ram, 3); free_netdev(dev_mvme147_lance); } #endif /* MODULE */