xref: /openbmc/linux/drivers/net/ethernet/8390/hydra.c (revision c819e2cf)
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/interrupt.h>
21 #include <linux/netdevice.h>
22 #include <linux/etherdevice.h>
23 #include <linux/skbuff.h>
24 #include <linux/init.h>
25 #include <linux/bitops.h>
26 
27 #include <asm/io.h>
28 #include <asm/irq.h>
29 #include <asm/amigaints.h>
30 #include <asm/amigahw.h>
31 #include <linux/zorro.h>
32 
33 #define EI_SHIFT(x)	(ei_local->reg_offset[x])
34 #define ei_inb(port)   in_8(port)
35 #define ei_outb(val,port)  out_8(port,val)
36 #define ei_inb_p(port)   in_8(port)
37 #define ei_outb_p(val,port)  out_8(port,val)
38 
39 static const char version[] =
40     "8390.c:v1.10cvs 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
41 
42 #include "lib8390.c"
43 
44 #define NE_EN0_DCFG     (0x0e*2)
45 
46 #define NESM_START_PG   0x0    /* First page of TX buffer */
47 #define NESM_STOP_PG    0x40    /* Last page +1 of RX ring */
48 
49 #define HYDRA_NIC_BASE 0xffe1
50 #define HYDRA_ADDRPROM 0xffc0
51 #define HYDRA_VERSION "v3.0alpha"
52 
53 #define WORDSWAP(a)     ((((a)>>8)&0xff) | ((a)<<8))
54 
55 
56 static int hydra_init_one(struct zorro_dev *z,
57 				    const struct zorro_device_id *ent);
58 static int hydra_init(struct zorro_dev *z);
59 static int hydra_open(struct net_device *dev);
60 static int hydra_close(struct net_device *dev);
61 static void hydra_reset_8390(struct net_device *dev);
62 static void hydra_get_8390_hdr(struct net_device *dev,
63 			       struct e8390_pkt_hdr *hdr, int ring_page);
64 static void hydra_block_input(struct net_device *dev, int count,
65 			      struct sk_buff *skb, int ring_offset);
66 static void hydra_block_output(struct net_device *dev, int count,
67 			       const unsigned char *buf, int start_page);
68 static void hydra_remove_one(struct zorro_dev *z);
69 static u32 hydra_msg_enable;
70 
71 static struct zorro_device_id hydra_zorro_tbl[] = {
72     { ZORRO_PROD_HYDRA_SYSTEMS_AMIGANET },
73     { 0 }
74 };
75 MODULE_DEVICE_TABLE(zorro, hydra_zorro_tbl);
76 
77 static struct zorro_driver hydra_driver = {
78     .name	= "hydra",
79     .id_table	= hydra_zorro_tbl,
80     .probe	= hydra_init_one,
81     .remove	= hydra_remove_one,
82 };
83 
84 static int hydra_init_one(struct zorro_dev *z,
85 			  const struct zorro_device_id *ent)
86 {
87     int err;
88 
89     if (!request_mem_region(z->resource.start, 0x10000, "Hydra"))
90 	return -EBUSY;
91     if ((err = hydra_init(z))) {
92 	release_mem_region(z->resource.start, 0x10000);
93 	return -EBUSY;
94     }
95     return 0;
96 }
97 
98 static const struct net_device_ops hydra_netdev_ops = {
99 	.ndo_open		= hydra_open,
100 	.ndo_stop		= hydra_close,
101 
102 	.ndo_start_xmit		= __ei_start_xmit,
103 	.ndo_tx_timeout		= __ei_tx_timeout,
104 	.ndo_get_stats		= __ei_get_stats,
105 	.ndo_set_rx_mode	= __ei_set_multicast_list,
106 	.ndo_validate_addr	= eth_validate_addr,
107 	.ndo_set_mac_address	= eth_mac_addr,
108 	.ndo_change_mtu		= eth_change_mtu,
109 #ifdef CONFIG_NET_POLL_CONTROLLER
110 	.ndo_poll_controller	= __ei_poll,
111 #endif
112 };
113 
114 static int hydra_init(struct zorro_dev *z)
115 {
116     struct net_device *dev;
117     unsigned long board = (unsigned long)ZTWO_VADDR(z->resource.start);
118     unsigned long ioaddr = board+HYDRA_NIC_BASE;
119     const char name[] = "NE2000";
120     int start_page, stop_page;
121     int j;
122     int err;
123     struct ei_device *ei_local;
124 
125     static u32 hydra_offsets[16] = {
126 	0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e,
127 	0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e,
128     };
129 
130     dev = ____alloc_ei_netdev(0);
131     if (!dev)
132 	return -ENOMEM;
133 
134     for (j = 0; j < ETH_ALEN; j++)
135 	dev->dev_addr[j] = *((u8 *)(board + HYDRA_ADDRPROM + 2*j));
136 
137     /* We must set the 8390 for word mode. */
138     z_writeb(0x4b, ioaddr + NE_EN0_DCFG);
139     start_page = NESM_START_PG;
140     stop_page = NESM_STOP_PG;
141 
142     ei_local = netdev_priv(dev);
143     ei_local->msg_enable = hydra_msg_enable;
144     dev->base_addr = ioaddr;
145     dev->irq = IRQ_AMIGA_PORTS;
146 
147     /* Install the Interrupt handler */
148     if (request_irq(IRQ_AMIGA_PORTS, __ei_interrupt, IRQF_SHARED, "Hydra Ethernet",
149 		    dev)) {
150 	free_netdev(dev);
151 	return -EAGAIN;
152     }
153 
154     ei_status.name = name;
155     ei_status.tx_start_page = start_page;
156     ei_status.stop_page = stop_page;
157     ei_status.word16 = 1;
158     ei_status.bigendian = 1;
159 
160     ei_status.rx_start_page = start_page + TX_PAGES;
161 
162     ei_status.reset_8390 = hydra_reset_8390;
163     ei_status.block_input = hydra_block_input;
164     ei_status.block_output = hydra_block_output;
165     ei_status.get_8390_hdr = hydra_get_8390_hdr;
166     ei_status.reg_offset = hydra_offsets;
167 
168     dev->netdev_ops = &hydra_netdev_ops;
169     __NS8390_init(dev, 0);
170 
171     err = register_netdev(dev);
172     if (err) {
173 	free_irq(IRQ_AMIGA_PORTS, dev);
174 	free_netdev(dev);
175 	return err;
176     }
177 
178     zorro_set_drvdata(z, dev);
179 
180     pr_info("%s: Hydra at %pR, address %pM (hydra.c " HYDRA_VERSION ")\n",
181 	    dev->name, &z->resource, dev->dev_addr);
182 
183     return 0;
184 }
185 
186 static int hydra_open(struct net_device *dev)
187 {
188     __ei_open(dev);
189     return 0;
190 }
191 
192 static int hydra_close(struct net_device *dev)
193 {
194     struct ei_device *ei_local = netdev_priv(dev);
195 
196     netif_dbg(ei_local, ifdown, dev, "Shutting down ethercard.\n");
197     __ei_close(dev);
198     return 0;
199 }
200 
201 static void hydra_reset_8390(struct net_device *dev)
202 {
203     netdev_info(dev, "Hydra hw reset not there\n");
204 }
205 
206 static void hydra_get_8390_hdr(struct net_device *dev,
207 			       struct e8390_pkt_hdr *hdr, int ring_page)
208 {
209     int nic_base = dev->base_addr;
210     short *ptrs;
211     unsigned long hdr_start= (nic_base-HYDRA_NIC_BASE) +
212 			     ((ring_page - NESM_START_PG)<<8);
213     ptrs = (short *)hdr;
214 
215     *(ptrs++) = z_readw(hdr_start);
216     *((short *)hdr) = WORDSWAP(*((short *)hdr));
217     hdr_start += 2;
218     *(ptrs++) = z_readw(hdr_start);
219     *((short *)hdr+1) = WORDSWAP(*((short *)hdr+1));
220 }
221 
222 static void hydra_block_input(struct net_device *dev, int count,
223 			      struct sk_buff *skb, int ring_offset)
224 {
225     unsigned long nic_base = dev->base_addr;
226     unsigned long mem_base = nic_base - HYDRA_NIC_BASE;
227     unsigned long xfer_start = mem_base + ring_offset - (NESM_START_PG<<8);
228 
229     if (count&1)
230 	count++;
231 
232     if (xfer_start+count >  mem_base + (NESM_STOP_PG<<8)) {
233 	int semi_count = (mem_base + (NESM_STOP_PG<<8)) - xfer_start;
234 
235 	z_memcpy_fromio(skb->data,xfer_start,semi_count);
236 	count -= semi_count;
237 	z_memcpy_fromio(skb->data+semi_count, mem_base, count);
238     } else
239 	z_memcpy_fromio(skb->data, xfer_start,count);
240 
241 }
242 
243 static void hydra_block_output(struct net_device *dev, int count,
244 			       const unsigned char *buf, int start_page)
245 {
246     unsigned long nic_base = dev->base_addr;
247     unsigned long mem_base = nic_base - HYDRA_NIC_BASE;
248 
249     if (count&1)
250 	count++;
251 
252     z_memcpy_toio(mem_base+((start_page - NESM_START_PG)<<8), buf, count);
253 }
254 
255 static void hydra_remove_one(struct zorro_dev *z)
256 {
257     struct net_device *dev = zorro_get_drvdata(z);
258 
259     unregister_netdev(dev);
260     free_irq(IRQ_AMIGA_PORTS, dev);
261     release_mem_region(ZTWO_PADDR(dev->base_addr)-HYDRA_NIC_BASE, 0x10000);
262     free_netdev(dev);
263 }
264 
265 static int __init hydra_init_module(void)
266 {
267     return zorro_register_driver(&hydra_driver);
268 }
269 
270 static void __exit hydra_cleanup_module(void)
271 {
272     zorro_unregister_driver(&hydra_driver);
273 }
274 
275 module_init(hydra_init_module);
276 module_exit(hydra_cleanup_module);
277 
278 MODULE_LICENSE("GPL");
279