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[linux.git] / drivers / net / hydra.c
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1da177e4
LT		 1/* New Hydra driver using generic 8390 core */
2/* Based on old hydra driver by Topi Kanerva ([email protected]) */
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 ([email protected]) */
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
8c6270f9
AV		 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 ([email protected])\n";
42
43#include "lib8390.c"
1da177e4
LT		 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 int __devinit hydra_init(struct zorro_dev *z)
98{
99 struct net_device *dev;
100 unsigned long board = ZTWO_VADDR(z->resource.start);
101 unsigned long ioaddr = board+HYDRA_NIC_BASE;
102 const char name[] = "NE2000";
103 int start_page, stop_page;
104 int j;
105 int err;
106
107 static u32 hydra_offsets[16] = {
108 0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e,
109 0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e,
110 };
111
8c6270f9 112 dev = ____alloc_ei_netdev(0);
1da177e4
LT		 113 if (!dev)
114 return -ENOMEM;
1da177e4
LT		 115
116 for(j = 0; j < ETHER_ADDR_LEN; j++)
117 dev->dev_addr[j] = *((u8 *)(board + HYDRA_ADDRPROM + 2*j));
118
119 /* We must set the 8390 for word mode. */
120 z_writeb(0x4b, ioaddr + NE_EN0_DCFG);
121 start_page = NESM_START_PG;
122 stop_page = NESM_STOP_PG;
123
124 dev->base_addr = ioaddr;
125 dev->irq = IRQ_AMIGA_PORTS;
126
127 /* Install the Interrupt handler */
8c6270f9 128 if (request_irq(IRQ_AMIGA_PORTS, __ei_interrupt, IRQF_SHARED, "Hydra Ethernet",
1da177e4
LT		 129 dev)) {
130 free_netdev(dev);
131 return -EAGAIN;
132 }
133
134 ei_status.name = name;
135 ei_status.tx_start_page = start_page;
136 ei_status.stop_page = stop_page;
137 ei_status.word16 = 1;
138 ei_status.bigendian = 1;
139
140 ei_status.rx_start_page = start_page + TX_PAGES;
141
142 ei_status.reset_8390 = &hydra_reset_8390;
143 ei_status.block_input = &hydra_block_input;
144 ei_status.block_output = &hydra_block_output;
145 ei_status.get_8390_hdr = &hydra_get_8390_hdr;
146 ei_status.reg_offset = hydra_offsets;
147 dev->open = &hydra_open;
148 dev->stop = &hydra_close;
149#ifdef CONFIG_NET_POLL_CONTROLLER
8c6270f9 150 dev->poll_controller = __ei_poll;
1da177e4
LT		 151#endif
152
8c6270f9 153 __NS8390_init(dev, 0);
1da177e4
LT		 154
155 err = register_netdev(dev);
156 if (err) {
157 free_irq(IRQ_AMIGA_PORTS, dev);
158 free_netdev(dev);
159 return err;
160 }
161
162 zorro_set_drvdata(z, dev);
163
164 printk(KERN_INFO "%s: Hydra at 0x%08lx, address "
165 "%02x:%02x:%02x:%02x:%02x:%02x (hydra.c " HYDRA_VERSION ")\n",
166 dev->name, z->resource.start, dev->dev_addr[0], dev->dev_addr[1],
167 dev->dev_addr[2], dev->dev_addr[3], dev->dev_addr[4],
168 dev->dev_addr[5]);
169
170 return 0;
171}
172
173static int hydra_open(struct net_device *dev)
174{
8c6270f9 175 __ei_open(dev);
1da177e4
LT		 176 return 0;
177}
178
179static int hydra_close(struct net_device *dev)
180{
181 if (ei_debug > 1)
182 printk(KERN_DEBUG "%s: Shutting down ethercard.\n", dev->name);
8c6270f9 183 __ei_close(dev);
1da177e4
LT		 184 return 0;
185}
186
187static void hydra_reset_8390(struct net_device *dev)
188{
189 printk(KERN_INFO "Hydra hw reset not there\n");
190}
191
192static void hydra_get_8390_hdr(struct net_device *dev,
193 struct e8390_pkt_hdr *hdr, int ring_page)
194{
195 int nic_base = dev->base_addr;
196 short *ptrs;
197 unsigned long hdr_start= (nic_base-HYDRA_NIC_BASE) +
198 ((ring_page - NESM_START_PG)<<8);
199 ptrs = (short *)hdr;
200
201 *(ptrs++) = z_readw(hdr_start);
202 *((short *)hdr) = WORDSWAP(*((short *)hdr));
203 hdr_start += 2;
204 *(ptrs++) = z_readw(hdr_start);
205 *((short *)hdr+1) = WORDSWAP(*((short *)hdr+1));
206}
207
208static void hydra_block_input(struct net_device *dev, int count,
209 struct sk_buff *skb, int ring_offset)
210{
211 unsigned long nic_base = dev->base_addr;
212 unsigned long mem_base = nic_base - HYDRA_NIC_BASE;
213 unsigned long xfer_start = mem_base + ring_offset - (NESM_START_PG<<8);
214
215 if (count&1)
216 count++;
217
218 if (xfer_start+count > mem_base + (NESM_STOP_PG<<8)) {
219 int semi_count = (mem_base + (NESM_STOP_PG<<8)) - xfer_start;
220
221 z_memcpy_fromio(skb->data,xfer_start,semi_count);
222 count -= semi_count;
223 z_memcpy_fromio(skb->data+semi_count, mem_base, count);
224 } else
225 z_memcpy_fromio(skb->data, xfer_start,count);
226
227}
228
229static void hydra_block_output(struct net_device *dev, int count,
230 const unsigned char *buf, int start_page)
231{
232 unsigned long nic_base = dev->base_addr;
233 unsigned long mem_base = nic_base - HYDRA_NIC_BASE;
234
235 if (count&1)
236 count++;
237
238 z_memcpy_toio(mem_base+((start_page - NESM_START_PG)<<8), buf, count);
239}
240
241static void __devexit hydra_remove_one(struct zorro_dev *z)
242{
243 struct net_device *dev = zorro_get_drvdata(z);
244
245 unregister_netdev(dev);
246 free_irq(IRQ_AMIGA_PORTS, dev);
247 release_mem_region(ZTWO_PADDR(dev->base_addr)-HYDRA_NIC_BASE, 0x10000);
248 free_netdev(dev);
249}
250
251static int __init hydra_init_module(void)
252{
33d8675e 253 return zorro_register_driver(&hydra_driver);
1da177e4
LT		 254}
255
256static void __exit hydra_cleanup_module(void)
257{
258 zorro_unregister_driver(&hydra_driver);
259}
260
261module_init(hydra_init_module);
262module_exit(hydra_cleanup_module);
263
264MODULE_LICENSE("GPL");
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