Root/drivers/net/hydra.c

1/* New Hydra driver using generic 8390 core */
2/* Based on old hydra driver by Topi Kanerva (topi@susanna.oulu.fi) */
3
4/* This file is subject to the terms and conditions of the GNU General */
5/* Public License. See the file COPYING in the main directory of the */
6/* Linux distribution for more details. */
7
8/* Peter De Schrijver (p2@mind.be) */
9/* Oldenburg 2000 */
10
11/* The Amiganet is a Zorro-II board made by Hydra Systems. It contains a */
12/* NS8390 NIC (network interface controller) clone, 16 or 64K on-board RAM */
13/* and 10BASE-2 (thin coax) and AUI connectors. */
14
15#include <linux/module.h>
16#include <linux/kernel.h>
17#include <linux/string.h>
18#include <linux/errno.h>
19#include <linux/ioport.h>
20#include <linux/slab.h>
21#include <linux/interrupt.h>
22#include <linux/netdevice.h>
23#include <linux/etherdevice.h>
24#include <linux/skbuff.h>
25#include <linux/init.h>
26#include <linux/bitops.h>
27
28#include <asm/io.h>
29#include <asm/irq.h>
30#include <asm/amigaints.h>
31#include <asm/amigahw.h>
32#include <linux/zorro.h>
33
34#define EI_SHIFT(x) (ei_local->reg_offset[x])
35#define ei_inb(port) in_8(port)
36#define ei_outb(val,port) out_8(port,val)
37#define ei_inb_p(port) in_8(port)
38#define ei_outb_p(val,port) out_8(port,val)
39
40static const char version[] =
41    "8390.c:v1.10cvs 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
42
43#include "lib8390.c"
44
45#define NE_EN0_DCFG (0x0e*2)
46
47#define NESM_START_PG 0x0 /* First page of TX buffer */
48#define NESM_STOP_PG 0x40 /* Last page +1 of RX ring */
49
50#define HYDRA_NIC_BASE 0xffe1
51#define HYDRA_ADDRPROM 0xffc0
52#define HYDRA_VERSION "v3.0alpha"
53
54#define WORDSWAP(a) ((((a)>>8)&0xff) | ((a)<<8))
55
56
57static int __devinit hydra_init_one(struct zorro_dev *z,
58                    const struct zorro_device_id *ent);
59static int __devinit hydra_init(struct zorro_dev *z);
60static int hydra_open(struct net_device *dev);
61static int hydra_close(struct net_device *dev);
62static void hydra_reset_8390(struct net_device *dev);
63static void hydra_get_8390_hdr(struct net_device *dev,
64                   struct e8390_pkt_hdr *hdr, int ring_page);
65static void hydra_block_input(struct net_device *dev, int count,
66                  struct sk_buff *skb, int ring_offset);
67static void hydra_block_output(struct net_device *dev, int count,
68                   const unsigned char *buf, int start_page);
69static void __devexit hydra_remove_one(struct zorro_dev *z);
70
71static struct zorro_device_id hydra_zorro_tbl[] __devinitdata = {
72    { ZORRO_PROD_HYDRA_SYSTEMS_AMIGANET },
73    { 0 }
74};
75
76static struct zorro_driver hydra_driver = {
77    .name = "hydra",
78    .id_table = hydra_zorro_tbl,
79    .probe = hydra_init_one,
80    .remove = __devexit_p(hydra_remove_one),
81};
82
83static int __devinit hydra_init_one(struct zorro_dev *z,
84                    const struct zorro_device_id *ent)
85{
86    int err;
87
88    if (!request_mem_region(z->resource.start, 0x10000, "Hydra"))
89    return -EBUSY;
90    if ((err = hydra_init(z))) {
91    release_mem_region(z->resource.start, 0x10000);
92    return -EBUSY;
93    }
94    return 0;
95}
96
97static const struct net_device_ops hydra_netdev_ops = {
98    .ndo_open = hydra_open,
99    .ndo_stop = hydra_close,
100
101    .ndo_start_xmit = ei_start_xmit,
102    .ndo_tx_timeout = ei_tx_timeout,
103    .ndo_get_stats = ei_get_stats,
104    .ndo_set_multicast_list = ei_set_multicast_list,
105    .ndo_validate_addr = eth_validate_addr,
106    .ndo_set_mac_address = eth_mac_addr,
107    .ndo_change_mtu = eth_change_mtu,
108#ifdef CONFIG_NET_POLL_CONTROLLER
109    .ndo_poll_controller = ei_poll,
110#endif
111};
112
113static int __devinit hydra_init(struct zorro_dev *z)
114{
115    struct net_device *dev;
116    unsigned long board = ZTWO_VADDR(z->resource.start);
117    unsigned long ioaddr = board+HYDRA_NIC_BASE;
118    const char name[] = "NE2000";
119    int start_page, stop_page;
120    int j;
121    int err;
122
123    static u32 hydra_offsets[16] = {
124    0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e,
125    0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e,
126    };
127
128    dev = alloc_ei_netdev();
129    if (!dev)
130    return -ENOMEM;
131
132    for(j = 0; j < ETHER_ADDR_LEN; j++)
133    dev->dev_addr[j] = *((u8 *)(board + HYDRA_ADDRPROM + 2*j));
134
135    /* We must set the 8390 for word mode. */
136    z_writeb(0x4b, ioaddr + NE_EN0_DCFG);
137    start_page = NESM_START_PG;
138    stop_page = NESM_STOP_PG;
139
140    dev->base_addr = ioaddr;
141    dev->irq = IRQ_AMIGA_PORTS;
142
143    /* Install the Interrupt handler */
144    if (request_irq(IRQ_AMIGA_PORTS, __ei_interrupt, IRQF_SHARED, "Hydra Ethernet",
145            dev)) {
146    free_netdev(dev);
147    return -EAGAIN;
148    }
149
150    ei_status.name = name;
151    ei_status.tx_start_page = start_page;
152    ei_status.stop_page = stop_page;
153    ei_status.word16 = 1;
154    ei_status.bigendian = 1;
155
156    ei_status.rx_start_page = start_page + TX_PAGES;
157
158    ei_status.reset_8390 = &hydra_reset_8390;
159    ei_status.block_input = &hydra_block_input;
160    ei_status.block_output = &hydra_block_output;
161    ei_status.get_8390_hdr = &hydra_get_8390_hdr;
162    ei_status.reg_offset = hydra_offsets;
163
164    dev->netdev_ops = &hydra_netdev_ops;
165    __NS8390_init(dev, 0);
166
167    err = register_netdev(dev);
168    if (err) {
169    free_irq(IRQ_AMIGA_PORTS, dev);
170    free_netdev(dev);
171    return err;
172    }
173
174    zorro_set_drvdata(z, dev);
175
176    printk(KERN_INFO "%s: Hydra at 0x%08lx, address "
177       "%pM (hydra.c " HYDRA_VERSION ")\n",
178       dev->name, z->resource.start, dev->dev_addr);
179
180    return 0;
181}
182
183static int hydra_open(struct net_device *dev)
184{
185    __ei_open(dev);
186    return 0;
187}
188
189static int hydra_close(struct net_device *dev)
190{
191    if (ei_debug > 1)
192    printk(KERN_DEBUG "%s: Shutting down ethercard.\n", dev->name);
193    __ei_close(dev);
194    return 0;
195}
196
197static void hydra_reset_8390(struct net_device *dev)
198{
199    printk(KERN_INFO "Hydra hw reset not there\n");
200}
201
202static void hydra_get_8390_hdr(struct net_device *dev,
203                   struct e8390_pkt_hdr *hdr, int ring_page)
204{
205    int nic_base = dev->base_addr;
206    short *ptrs;
207    unsigned long hdr_start= (nic_base-HYDRA_NIC_BASE) +
208                 ((ring_page - NESM_START_PG)<<8);
209    ptrs = (short *)hdr;
210
211    *(ptrs++) = z_readw(hdr_start);
212    *((short *)hdr) = WORDSWAP(*((short *)hdr));
213    hdr_start += 2;
214    *(ptrs++) = z_readw(hdr_start);
215    *((short *)hdr+1) = WORDSWAP(*((short *)hdr+1));
216}
217
218static void hydra_block_input(struct net_device *dev, int count,
219                  struct sk_buff *skb, int ring_offset)
220{
221    unsigned long nic_base = dev->base_addr;
222    unsigned long mem_base = nic_base - HYDRA_NIC_BASE;
223    unsigned long xfer_start = mem_base + ring_offset - (NESM_START_PG<<8);
224
225    if (count&1)
226    count++;
227
228    if (xfer_start+count > mem_base + (NESM_STOP_PG<<8)) {
229    int semi_count = (mem_base + (NESM_STOP_PG<<8)) - xfer_start;
230
231    z_memcpy_fromio(skb->data,xfer_start,semi_count);
232    count -= semi_count;
233    z_memcpy_fromio(skb->data+semi_count, mem_base, count);
234    } else
235    z_memcpy_fromio(skb->data, xfer_start,count);
236
237}
238
239static void hydra_block_output(struct net_device *dev, int count,
240                   const unsigned char *buf, int start_page)
241{
242    unsigned long nic_base = dev->base_addr;
243    unsigned long mem_base = nic_base - HYDRA_NIC_BASE;
244
245    if (count&1)
246    count++;
247
248    z_memcpy_toio(mem_base+((start_page - NESM_START_PG)<<8), buf, count);
249}
250
251static void __devexit hydra_remove_one(struct zorro_dev *z)
252{
253    struct net_device *dev = zorro_get_drvdata(z);
254
255    unregister_netdev(dev);
256    free_irq(IRQ_AMIGA_PORTS, dev);
257    release_mem_region(ZTWO_PADDR(dev->base_addr)-HYDRA_NIC_BASE, 0x10000);
258    free_netdev(dev);
259}
260
261static int __init hydra_init_module(void)
262{
263    return zorro_register_driver(&hydra_driver);
264}
265
266static void __exit hydra_cleanup_module(void)
267{
268    zorro_unregister_driver(&hydra_driver);
269}
270
271module_init(hydra_init_module);
272module_exit(hydra_cleanup_module);
273
274MODULE_LICENSE("GPL");
275

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