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Linux/drivers/net/ethernet/8390/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/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 

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