1 // SPDX-License-Identifier: GPL-2.0-only
2
3 /* New Hydra driver using generic 8390 core */
4 /* Based on old hydra driver by Topi Kanerva (topi@susanna.oulu.fi) */
5
6 /* Peter De Schrijver (p2@mind.be) */
7 /* Oldenburg 2000 */
8
9 /* The Amiganet is a Zorro-II board made by Hydra Systems. It contains a */
10 /* NS8390 NIC (network interface controller) clone, 16 or 64K on-board RAM */
11 /* and 10BASE-2 (thin coax) and AUI connectors. */
12
13 #include <linux/module.h>
14 #include <linux/kernel.h>
15 #include <linux/string.h>
16 #include <linux/errno.h>
17 #include <linux/ioport.h>
18 #include <linux/interrupt.h>
19 #include <linux/netdevice.h>
20 #include <linux/etherdevice.h>
21 #include <linux/skbuff.h>
22 #include <linux/init.h>
23 #include <linux/bitops.h>
24
25 #include <asm/io.h>
26 #include <asm/irq.h>
27 #include <asm/amigaints.h>
28 #include <asm/amigahw.h>
29 #include <linux/zorro.h>
30
31 #define EI_SHIFT(x) (ei_local->reg_offset[x])
32 #define ei_inb(port) in_8(port)
33 #define ei_outb(val,port) out_8(port,val)
34 #define ei_inb_p(port) in_8(port)
35 #define ei_outb_p(val,port) out_8(port,val)
36
37 static const char version[] =
38 "8390.c:v1.10cvs 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
39
40 #include "lib8390.c"
41
42 #define NE_EN0_DCFG (0x0e*2)
43
44 #define NESM_START_PG 0x0 /* First page of TX buffer */
45 #define NESM_STOP_PG 0x40 /* Last page +1 of RX ring */
46
47 #define HYDRA_NIC_BASE 0xffe1
48 #define HYDRA_ADDRPROM 0xffc0
49 #define HYDRA_VERSION "v3.0alpha"
50
51 #define WORDSWAP(a) ((((a)>>8)&0xff) | ((a)<<8))
52
53
54 static int hydra_init_one(struct zorro_dev *z,
55 const struct zorro_device_id *ent);
56 static int hydra_init(struct zorro_dev *z);
57 static int hydra_open(struct net_device *dev);
58 static int hydra_close(struct net_device *dev);
59 static void hydra_reset_8390(struct net_device *dev);
60 static void hydra_get_8390_hdr(struct net_device *dev,
61 struct e8390_pkt_hdr *hdr, int ring_page);
62 static void hydra_block_input(struct net_device *dev, int count,
63 struct sk_buff *skb, int ring_offset);
64 static void hydra_block_output(struct net_device *dev, int count,
65 const unsigned char *buf, int start_page);
66 static void hydra_remove_one(struct zorro_dev *z);
67
68 static struct zorro_device_id hydra_zorro_tbl[] = {
69 { ZORRO_PROD_HYDRA_SYSTEMS_AMIGANET },
70 { 0 }
71 };
72 MODULE_DEVICE_TABLE(zorro, hydra_zorro_tbl);
73
74 static struct zorro_driver hydra_driver = {
75 .name = "hydra",
76 .id_table = hydra_zorro_tbl,
77 .probe = hydra_init_one,
78 .remove = hydra_remove_one,
79 };
80
hydra_init_one(struct zorro_dev * z,const struct zorro_device_id * ent)81 static int hydra_init_one(struct zorro_dev *z,
82 const struct zorro_device_id *ent)
83 {
84 int err;
85
86 if (!request_mem_region(z->resource.start, 0x10000, "Hydra"))
87 return -EBUSY;
88 if ((err = hydra_init(z))) {
89 release_mem_region(z->resource.start, 0x10000);
90 return -EBUSY;
91 }
92 return 0;
93 }
94
95 static const struct net_device_ops hydra_netdev_ops = {
96 .ndo_open = hydra_open,
97 .ndo_stop = hydra_close,
98
99 .ndo_start_xmit = __ei_start_xmit,
100 .ndo_tx_timeout = __ei_tx_timeout,
101 .ndo_get_stats = __ei_get_stats,
102 .ndo_set_rx_mode = __ei_set_multicast_list,
103 .ndo_validate_addr = eth_validate_addr,
104 .ndo_set_mac_address = eth_mac_addr,
105 #ifdef CONFIG_NET_POLL_CONTROLLER
106 .ndo_poll_controller = __ei_poll,
107 #endif
108 };
109
hydra_init(struct zorro_dev * z)110 static int hydra_init(struct zorro_dev *z)
111 {
112 struct net_device *dev;
113 unsigned long board = (unsigned long)ZTWO_VADDR(z->resource.start);
114 unsigned long ioaddr = board+HYDRA_NIC_BASE;
115 const char name[] = "NE2000";
116 int start_page, stop_page;
117 u8 macaddr[ETH_ALEN];
118 int j;
119 int err;
120
121 static u32 hydra_offsets[16] = {
122 0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e,
123 0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e,
124 };
125
126 dev = ____alloc_ei_netdev(0);
127 if (!dev)
128 return -ENOMEM;
129
130 for (j = 0; j < ETH_ALEN; j++)
131 macaddr[j] = *((u8 *)(board + HYDRA_ADDRPROM + 2*j));
132 eth_hw_addr_set(dev, macaddr);
133
134 /* We must set the 8390 for word mode. */
135 z_writeb(0x4b, ioaddr + NE_EN0_DCFG);
136 start_page = NESM_START_PG;
137 stop_page = NESM_STOP_PG;
138
139 dev->base_addr = ioaddr;
140 dev->irq = IRQ_AMIGA_PORTS;
141
142 /* Install the Interrupt handler */
143 if (request_irq(IRQ_AMIGA_PORTS, __ei_interrupt, IRQF_SHARED, "Hydra Ethernet",
144 dev)) {
145 free_netdev(dev);
146 return -EAGAIN;
147 }
148
149 ei_status.name = name;
150 ei_status.tx_start_page = start_page;
151 ei_status.stop_page = stop_page;
152 ei_status.word16 = 1;
153 ei_status.bigendian = 1;
154
155 ei_status.rx_start_page = start_page + TX_PAGES;
156
157 ei_status.reset_8390 = hydra_reset_8390;
158 ei_status.block_input = hydra_block_input;
159 ei_status.block_output = hydra_block_output;
160 ei_status.get_8390_hdr = hydra_get_8390_hdr;
161 ei_status.reg_offset = hydra_offsets;
162
163 dev->netdev_ops = &hydra_netdev_ops;
164 __NS8390_init(dev, 0);
165
166 err = register_netdev(dev);
167 if (err) {
168 free_irq(IRQ_AMIGA_PORTS, dev);
169 free_netdev(dev);
170 return err;
171 }
172
173 zorro_set_drvdata(z, dev);
174
175 pr_info("%s: Hydra at %pR, address %pM (hydra.c " HYDRA_VERSION ")\n",
176 dev->name, &z->resource, dev->dev_addr);
177
178 return 0;
179 }
180
hydra_open(struct net_device * dev)181 static int hydra_open(struct net_device *dev)
182 {
183 __ei_open(dev);
184 return 0;
185 }
186
hydra_close(struct net_device * dev)187 static int hydra_close(struct net_device *dev)
188 {
189 struct ei_device *ei_local = netdev_priv(dev);
190
191 netif_dbg(ei_local, ifdown, dev, "Shutting down ethercard.\n");
192 __ei_close(dev);
193 return 0;
194 }
195
hydra_reset_8390(struct net_device * dev)196 static void hydra_reset_8390(struct net_device *dev)
197 {
198 netdev_info(dev, "Hydra hw reset not there\n");
199 }
200
hydra_get_8390_hdr(struct net_device * dev,struct e8390_pkt_hdr * hdr,int ring_page)201 static void hydra_get_8390_hdr(struct net_device *dev,
202 struct e8390_pkt_hdr *hdr, int ring_page)
203 {
204 int nic_base = dev->base_addr;
205 short *ptrs;
206 unsigned long hdr_start= (nic_base-HYDRA_NIC_BASE) +
207 ((ring_page - NESM_START_PG)<<8);
208 ptrs = (short *)hdr;
209
210 *(ptrs++) = z_readw(hdr_start);
211 *((short *)hdr) = WORDSWAP(*((short *)hdr));
212 hdr_start += 2;
213 *(ptrs++) = z_readw(hdr_start);
214 *((short *)hdr+1) = WORDSWAP(*((short *)hdr+1));
215 }
216
hydra_block_input(struct net_device * dev,int count,struct sk_buff * skb,int ring_offset)217 static void hydra_block_input(struct net_device *dev, int count,
218 struct sk_buff *skb, int ring_offset)
219 {
220 unsigned long nic_base = dev->base_addr;
221 unsigned long mem_base = nic_base - HYDRA_NIC_BASE;
222 unsigned long xfer_start = mem_base + ring_offset - (NESM_START_PG<<8);
223
224 if (count&1)
225 count++;
226
227 if (xfer_start+count > mem_base + (NESM_STOP_PG<<8)) {
228 int semi_count = (mem_base + (NESM_STOP_PG<<8)) - xfer_start;
229
230 z_memcpy_fromio(skb->data,xfer_start,semi_count);
231 count -= semi_count;
232 z_memcpy_fromio(skb->data+semi_count, mem_base, count);
233 } else
234 z_memcpy_fromio(skb->data, xfer_start,count);
235
236 }
237
hydra_block_output(struct net_device * dev,int count,const unsigned char * buf,int start_page)238 static void hydra_block_output(struct net_device *dev, int count,
239 const unsigned char *buf, int start_page)
240 {
241 unsigned long nic_base = dev->base_addr;
242 unsigned long mem_base = nic_base - HYDRA_NIC_BASE;
243
244 if (count&1)
245 count++;
246
247 z_memcpy_toio(mem_base+((start_page - NESM_START_PG)<<8), buf, count);
248 }
249
hydra_remove_one(struct zorro_dev * z)250 static void hydra_remove_one(struct zorro_dev *z)
251 {
252 struct net_device *dev = zorro_get_drvdata(z);
253
254 unregister_netdev(dev);
255 free_irq(IRQ_AMIGA_PORTS, dev);
256 release_mem_region(ZTWO_PADDR(dev->base_addr)-HYDRA_NIC_BASE, 0x10000);
257 free_netdev(dev);
258 }
259
hydra_init_module(void)260 static int __init hydra_init_module(void)
261 {
262 return zorro_register_driver(&hydra_driver);
263 }
264
hydra_cleanup_module(void)265 static void __exit hydra_cleanup_module(void)
266 {
267 zorro_unregister_driver(&hydra_driver);
268 }
269
270 module_init(hydra_init_module);
271 module_exit(hydra_cleanup_module);
272
273 MODULE_DESCRIPTION("Zorro-II Hydra 8390 ethernet driver");
274 MODULE_LICENSE("GPL");
275