xref: /linux/drivers/net/ethernet/8390/hydra.c (revision 06d07429858317ded2db7986113a9e0129cd599b)
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