hydra.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:7k
- /* New Hydra driver using generic 8390 core */
- /* Based on old hydra driver by Topi Kanerva (topi@susanna.oulu.fi) */
- /* This file is subject to the terms and conditions of the GNU General */
- /* Public License. See the file COPYING in the main directory of the */
- /* Linux distribution for more details. */
- /* Peter De Schrijver (p2@mind.be) */
- /* Oldenburg 2000 */
- /* The Amiganet is a Zorro-II board made by Hydra Systems. It contains a */
- /* NS8390 NIC (network interface controller) clone, 16 or 64K on-board RAM */
- /* and 10BASE-2 (thin coax) and AUI connectors. */
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <linux/string.h>
- #include <linux/ptrace.h>
- #include <linux/errno.h>
- #include <linux/ioport.h>
- #include <linux/slab.h>
- #include <linux/interrupt.h>
- #include <linux/netdevice.h>
- #include <linux/etherdevice.h>
- #include <linux/skbuff.h>
- #include <linux/init.h>
- #include <asm/bitops.h>
- #include <asm/io.h>
- #include <asm/irq.h>
- #include <asm/amigaints.h>
- #include <asm/amigahw.h>
- #include <linux/zorro.h>
- #include "8390.h"
- #define NE_BASE (dev->base_addr)
- #define NE_CMD (0x00*2)
- #define NE_EN0_ISR (0x07*2)
- #define NE_EN0_DCFG (0x0e*2)
- #define NE_EN0_RSARLO (0x08*2)
- #define NE_EN0_RSARHI (0x09*2)
- #define NE_EN0_RCNTLO (0x0a*2)
- #define NE_EN0_RXCR (0x0c*2)
- #define NE_EN0_TXCR (0x0d*2)
- #define NE_EN0_RCNTHI (0x0b*2)
- #define NE_EN0_IMR (0x0f*2)
- #define NESM_START_PG 0x0 /* First page of TX buffer */
- #define NESM_STOP_PG 0x40 /* Last page +1 of RX ring */
- #define HYDRA_NIC_BASE 0xffe1
- #define HYDRA_ADDRPROM 0xffc0
- #define HYDRA_VERSION "v3.0alpha"
- #define WORDSWAP(a) ((((a)>>8)&0xff) | ((a)<<8))
- #ifdef MODULE
- static struct net_device *root_hydra_dev;
- #endif
- static int __init hydra_probe(void);
- static int hydra_init(unsigned long board);
- static int hydra_open(struct net_device *dev);
- static int hydra_close(struct net_device *dev);
- static void hydra_reset_8390(struct net_device *dev);
- static void hydra_get_8390_hdr(struct net_device *dev,
- struct e8390_pkt_hdr *hdr, int ring_page);
- static void hydra_block_input(struct net_device *dev, int count,
- struct sk_buff *skb, int ring_offset);
- static void hydra_block_output(struct net_device *dev, int count,
- const unsigned char *buf, int start_page);
- static void __exit hydra_cleanup(void);
- static int __init hydra_probe(void)
- {
- struct zorro_dev *z = NULL;
- unsigned long board;
- int err = -ENODEV;
- while ((z = zorro_find_device(ZORRO_PROD_HYDRA_SYSTEMS_AMIGANET, z))) {
- board = z->resource.start;
- if (!request_mem_region(board, 0x10000, "Hydra"))
- continue;
- if ((err = hydra_init(ZTWO_VADDR(board)))) {
- release_mem_region(board, 0x10000);
- return err;
- }
- err = 0;
- }
- if (err == -ENODEV)
- printk("No Hydra ethernet card found.n");
- return err;
- }
- int __init hydra_init(unsigned long board)
- {
- struct net_device *dev;
- unsigned long ioaddr = board+HYDRA_NIC_BASE;
- const char *name = NULL;
- int start_page, stop_page;
- int j;
- static u32 hydra_offsets[16] = {
- 0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e,
- 0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e,
- };
- dev = init_etherdev(NULL, 0);
- if (!dev)
- return -ENOMEM;
- SET_MODULE_OWNER(dev);
- for(j = 0; j < ETHER_ADDR_LEN; j++)
- dev->dev_addr[j] = *((u8 *)(board + HYDRA_ADDRPROM + 2*j));
- /* We must set the 8390 for word mode. */
- z_writeb(0x4b, ioaddr + NE_EN0_DCFG);
- start_page = NESM_START_PG;
- stop_page = NESM_STOP_PG;
- dev->base_addr = ioaddr;
- dev->irq = IRQ_AMIGA_PORTS;
- /* Install the Interrupt handler */
- if (request_irq(IRQ_AMIGA_PORTS, ei_interrupt, SA_SHIRQ, "Hydra Ethernet",
- dev))
- return -EAGAIN;
- /* Allocate dev->priv and fill in 8390 specific dev fields. */
- if (ethdev_init(dev)) {
- printk("Unable to get memory for dev->priv.n");
- return -ENOMEM;
- }
- name = "NE2000";
- printk("%s: hydra at 0x%08lx, address %02x:%02x:%02x:%02x:%02x:%02x (hydra.c " HYDRA_VERSION ")n", dev->name, ZTWO_PADDR(board),
- dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
- dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
- ei_status.name = name;
- ei_status.tx_start_page = start_page;
- ei_status.stop_page = stop_page;
- ei_status.word16 = 1;
- ei_status.bigendian = 1;
- ei_status.rx_start_page = start_page + TX_PAGES;
- ei_status.reset_8390 = &hydra_reset_8390;
- ei_status.block_input = &hydra_block_input;
- ei_status.block_output = &hydra_block_output;
- ei_status.get_8390_hdr = &hydra_get_8390_hdr;
- ei_status.reg_offset = hydra_offsets;
- dev->open = &hydra_open;
- dev->stop = &hydra_close;
- #ifdef MODULE
- ei_status.priv = (unsigned long)root_hydra_dev;
- root_hydra_dev = dev;
- #endif
- NS8390_init(dev, 0);
- return 0;
- }
- static int hydra_open(struct net_device *dev)
- {
- ei_open(dev);
- return 0;
- }
- static int hydra_close(struct net_device *dev)
- {
- if (ei_debug > 1)
- printk("%s: Shutting down ethercard.n", dev->name);
- ei_close(dev);
- return 0;
- }
- static void hydra_reset_8390(struct net_device *dev)
- {
- printk("Hydra hw reset not theren");
- }
- static void hydra_get_8390_hdr(struct net_device *dev,
- struct e8390_pkt_hdr *hdr, int ring_page)
- {
- int nic_base = dev->base_addr;
- short *ptrs;
- unsigned long hdr_start= (nic_base-HYDRA_NIC_BASE) +
- ((ring_page - NESM_START_PG)<<8);
- ptrs = (short *)hdr;
- *(ptrs++) = z_readw(hdr_start);
- *((short *)hdr) = WORDSWAP(*((short *)hdr));
- hdr_start += 2;
- *(ptrs++) = z_readw(hdr_start);
- *((short *)hdr+1) = WORDSWAP(*((short *)hdr+1));
- }
- static void hydra_block_input(struct net_device *dev, int count,
- struct sk_buff *skb, int ring_offset)
- {
- unsigned long nic_base = dev->base_addr;
- unsigned long mem_base = nic_base - HYDRA_NIC_BASE;
- unsigned long xfer_start = mem_base + ring_offset - (NESM_START_PG<<8);
- if (count&1)
- count++;
- if (xfer_start+count > mem_base + (NESM_STOP_PG<<8)) {
- int semi_count = (mem_base + (NESM_STOP_PG<<8)) - xfer_start;
- z_memcpy_fromio(skb->data,xfer_start,semi_count);
- count -= semi_count;
- z_memcpy_fromio(skb->data+semi_count, mem_base, count);
- } else
- z_memcpy_fromio(skb->data, xfer_start,count);
- }
- static void hydra_block_output(struct net_device *dev, int count,
- const unsigned char *buf, int start_page)
- {
- unsigned long nic_base = dev->base_addr;
- unsigned long mem_base = nic_base - HYDRA_NIC_BASE;
- if (count&1)
- count++;
- z_memcpy_toio(mem_base+((start_page - NESM_START_PG)<<8), buf, count);
- }
- static void __exit hydra_cleanup(void)
- {
- #ifdef MODULE
- struct net_device *dev, *next;
- while ((dev = root_hydra_dev)) {
- next = (struct net_device *)(ei_status.priv);
- unregister_netdev(dev);
- free_irq(IRQ_AMIGA_PORTS, dev);
- release_mem_region(ZTWO_PADDR(dev->base_addr)-HYDRA_NIC_BASE, 0x10000);
- kfree(dev);
- root_hydra_dev = next;
- }
- #endif
- }
- module_init(hydra_probe);
- module_exit(hydra_cleanup);
- MODULE_LICENSE("GPL");