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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [net/] [hplance.c] - Rev 1765
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/* hplance.c : the Linux/hp300/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/sched.h> #include <linux/types.h> #include <linux/interrupt.h> #include <linux/ptrace.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> #include <asm/system.h> #include <asm/io.h> #include <asm/pgtable.h> /* Used for the temporal inet entries and routing */ #include <linux/socket.h> #include <linux/route.h> #include <linux/dio.h> #include <linux/netdevice.h> #include <linux/etherdevice.h> #include <linux/skbuff.h> #include "hplance.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 hplance_private { struct lance_private lance; unsigned int scode; void *base; }; /* 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... */ int hplance_probe(struct net_device *dev); static int hplance_init(struct net_device *dev, int scode); static int hplance_open(struct net_device *dev); static int hplance_close(struct net_device *dev); static void hplance_writerap(void *priv, unsigned short value); static void hplance_writerdp(void *priv, unsigned short value); static unsigned short hplance_readrdp(void *priv); #ifdef MODULE static struct hplance_private *root_hplance_dev; #endif /* Find all the HP Lance boards and initialise them... */ int __init hplance_probe(struct net_device *dev) { int cards = 0, called = 0; if (!MACH_IS_HP300 || called) return(ENODEV); called++; /* Isn't DIO nice? */ for(;;) { int v, scode = dio_find(DIO_ID_LAN); if (!scode) break; if(cards) dev = NULL; /* don't trash previous device, make a new one */ cards++; v = hplance_init(dev, scode); if (v) /* error, abort immediately */ return v; } /* OK, return success, or ENODEV if we didn't find any cards */ if (!cards) return -ENODEV; return 0; } /* Initialise a single lance board at the given select code */ static int __init hplance_init(struct net_device *dev, int scode) { const char *name = dio_scodetoname(scode); void *va = dio_scodetoviraddr(scode); struct hplance_private *lp; int i; #ifdef MODULE dev = init_etherdev(0, sizeof(struct hplance_private)); if (!dev) return -ENOMEM; #else dev->priv = kmalloc(sizeof(struct hplance_private), GFP_KERNEL); if (dev->priv == NULL) return -ENOMEM; memset(dev->priv, 0, sizeof(struct hplance_private)); #endif SET_MODULE_OWNER(dev); printk("%s: %s; select code %d, addr", dev->name, name, scode); /* reset the board */ out_8(va+DIO_IDOFF, 0xff); udelay(100); /* ariba! ariba! udelay! udelay! */ /* Fill the dev fields */ dev->base_addr = (unsigned long)va; dev->open = &hplance_open; dev->stop = &hplance_close; dev->hard_start_xmit = &lance_start_xmit; dev->get_stats = &lance_get_stats; dev->set_multicast_list = &lance_set_multicast; dev->dma = 0; for (i=0; i<6; i++) { /* The NVRAM holds our ethernet address, one nibble per byte, * at bytes NVRAMOFF+1,3,5,7,9... */ dev->dev_addr[i] = ((in_8(va + HPLANCE_NVRAMOFF + i*4 + 1) & 0xF) << 4) | (in_8(va + HPLANCE_NVRAMOFF + i*4 + 3) & 0xF); printk("%c%2.2x", i == 0 ? ' ' : ':', dev->dev_addr[i]); } lp = (struct hplance_private *)dev->priv; lp->lance.name = (char*)name; /* discards const, shut up gcc */ lp->lance.ll = (struct lance_regs *)(va + HPLANCE_REGOFF); lp->lance.init_block = (struct lance_init_block *)(va + HPLANCE_MEMOFF); /* CPU addr */ lp->lance.lance_init_block = 0; /* LANCE addr of same RAM */ lp->lance.busmaster_regval = LE_C3_BSWP; /* we're bigendian */ lp->lance.irq = dio_scodetoipl(scode); lp->lance.writerap = hplance_writerap; lp->lance.writerdp = hplance_writerdp; lp->lance.readrdp = hplance_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; lp->scode = scode; lp->base = va; ether_setup(dev); printk(", irq %d\n", lp->lance.irq); #ifdef MODULE dev->ifindex = dev_new_index(); lp->next_module = root_hplance_dev; root_hplance_dev = lp; #endif /* MODULE */ dio_config_board(scode); /* tell bus scanning code this one's taken */ return 0; } /* This is disgusting. We have to check the DIO status register for ack every * time we read or write the LANCE registers. */ static void hplance_writerap(void *priv, unsigned short value) { struct hplance_private *lp = (struct hplance_private *)priv; struct hplance_reg *hpregs = (struct hplance_reg *)lp->base; do { lp->lance.ll->rap = value; } while ((hpregs->status & LE_ACK) == 0); } static void hplance_writerdp(void *priv, unsigned short value) { struct hplance_private *lp = (struct hplance_private *)priv; struct hplance_reg *hpregs = (struct hplance_reg *)lp->base; do { lp->lance.ll->rdp = value; } while ((hpregs->status & LE_ACK) == 0); } static unsigned short hplance_readrdp(void *priv) { unsigned short val; struct hplance_private *lp = (struct hplance_private *)priv; struct hplance_reg *hpregs = (struct hplance_reg *)lp->base; do { val = lp->lance.ll->rdp; } while ((hpregs->status & LE_ACK) == 0); return val; } static int hplance_open(struct net_device *dev) { int status; struct hplance_private *lp = (struct hplance_private *)dev->priv; struct hplance_reg *hpregs = (struct hplance_reg *)lp->base; status = lance_open(dev); /* call generic lance open code */ if (status) return status; /* enable interrupts at board level. */ out_8(&(hpregs->status), LE_IE); return 0; } static int hplance_close(struct net_device *dev) { struct hplance_private *lp = (struct hplance_private *)dev->priv; struct hplance_reg *hpregs = (struct hplance_reg *)lp->base; out_8(&(hpregs->status), 8); /* disable interrupts at boardlevel */ lance_close(dev); return 0; } #ifdef MODULE MODULE_LICENSE("GPL"); int init_module(void) { root_lance_dev = NULL; return hplance_probe(NULL); } void cleanup_module(void) { /* Walk the chain of devices, unregistering them */ struct hplance_private *lp; while (root_hplance_dev) { lp = root_hplance_dev->next_module; dio_unconfig_board(lp->scode); unregister_netdev(root_lance_dev->dev); kfree(root_lance_dev->dev); root_lance_dev = lp; } } #endif /* MODULE */