mvme147.c
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上传日期:2013-02-24
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- /* 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/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 <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;
- void *base;
- void *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...
- */
- int mvme147lance_probe(struct net_device *dev);
- static int m147lance_open(struct net_device *dev);
- static int m147lance_close(struct net_device *dev);
- static void m147lance_writerap(struct m147lance_private *lp, unsigned short value);
- static void m147lance_writerdp(struct m147lance_private *lp, unsigned short value);
- static unsigned short m147lance_readrdp(struct m147lance_private *lp);
- typedef void (*writerap_t)(void *, unsigned short);
- typedef void (*writerdp_t)(void *, unsigned short);
- typedef unsigned short (*readrdp_t)(void *);
- #ifdef MODULE
- static struct m147lance_private *root_m147lance_dev;
- #endif
- /* Initialise the one and only on-board 7990 */
- int __init mvme147lance_probe(struct net_device *dev)
- {
- static int called;
- static const char name[] = "MVME147 LANCE";
- struct m147lance_private *lp;
- u_long *addr;
- u_long address;
- if (!MACH_IS_MVME147 || called)
- return -ENODEV;
- called++;
- SET_MODULE_OWNER(dev);
- dev->priv = kmalloc(sizeof(struct m147lance_private), GFP_KERNEL);
- if (dev->priv == NULL)
- return -ENOMEM;
- memset(dev->priv, 0, sizeof(struct m147lance_private));
- /* Fill the dev fields */
- dev->base_addr = (unsigned long)MVME147_LANCE_BASE;
- dev->open = &m147lance_open;
- dev->stop = &m147lance_close;
- dev->hard_start_xmit = &lance_start_xmit;
- dev->get_stats = &lance_get_stats;
- dev->set_multicast_list = &lance_set_multicast;
- dev->tx_timeout = &lance_tx_timeout;
- 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 %02x:%02x:%02x:%02x:%02x:%02xn",
- dev->name, dev->base_addr, MVME147_LANCE_IRQ,
- dev->dev_addr[0],
- dev->dev_addr[1], dev->dev_addr[2],
- dev->dev_addr[3], dev->dev_addr[4],
- dev->dev_addr[5]);
- lp = (struct m147lance_private *)dev->priv;
- lp->ram = (void *)__get_dma_pages(GFP_ATOMIC, 3); /* 16K */
- if (!lp->ram)
- {
- printk("%s: No memory for LANCE buffersn", dev->name);
- return -ENODEV;
- }
- lp->lance.name = (char*)name; /* discards const, shut up gcc */
- lp->lance.ll = (struct lance_regs *)(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;
- ether_setup(dev);
- #ifdef MODULE
- dev->ifindex = dev_new_index();
- lp->next_module = root_m147lance_dev;
- root_m147lance_dev = lp;
- #endif /* MODULE */
- return 0;
- }
- static void m147lance_writerap(struct m147lance_private *lp, unsigned short value)
- {
- lp->lance.ll->rap = value;
- }
- static void m147lance_writerdp(struct m147lance_private *lp, unsigned short value)
- {
- lp->lance.ll->rdp = value;
- }
- static unsigned short m147lance_readrdp(struct m147lance_private *lp)
- {
- return lp->lance.ll->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");
- int init_module(void)
- {
- root_lance_dev = NULL;
- return mvme147lance_probe(NULL);
- }
- void cleanup_module(void)
- {
- /* Walk the chain of devices, unregistering them */
- struct m147lance_private *lp;
- while (root_m147lance_dev) {
- lp = root_m147lance_dev->next_module;
- unregister_netdev(root_lance_dev->dev);
- free_pages(lp->ram, 3);
- kfree(root_lance_dev->dev);
- root_lance_dev = lp;
- }
- }
- #endif /* MODULE */