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1/* hplance.c : the Linux/hp300/lance ethernet driver
2 *
3 * Copyright (C) 05/1998 Peter Maydell <pmaydell@chiark.greenend.org.uk>
4 * Based on the Sun Lance driver and the NetBSD HP Lance driver
5 * Uses the generic 7990.c LANCE code.
6 */
7
8#include <linux/module.h>
9#include <linux/kernel.h>
10#include <linux/types.h>
11#include <linux/interrupt.h>
12#include <linux/ioport.h>
13#include <linux/string.h>
14#include <linux/delay.h>
15#include <linux/init.h>
16#include <linux/errno.h>
17/* Used for the temporal inet entries and routing */
18#include <linux/socket.h>
19#include <linux/route.h>
20#include <linux/dio.h>
21#include <linux/netdevice.h>
22#include <linux/etherdevice.h>
23#include <linux/skbuff.h>
24
25#include <asm/system.h>
26#include <asm/io.h>
27#include <asm/pgtable.h>
28
29#include "hplance.h"
30
31/* We have 16834 bytes of RAM for the init block and buffers. This places
32 * an upper limit on the number of buffers we can use. NetBSD uses 8 Rx
33 * buffers and 2 Tx buffers.
34 */
35#define LANCE_LOG_TX_BUFFERS 1
36#define LANCE_LOG_RX_BUFFERS 3
37
38#include "7990.h" /* use generic LANCE code */
39
40/* Our private data structure */
41struct hplance_private {
42 struct lance_private lance;
43};
44
45/* function prototypes... This is easy because all the grot is in the
46 * generic LANCE support. All we have to support is probing for boards,
47 * plus board-specific init, open and close actions.
48 * Oh, and we need to tell the generic code how to read and write LANCE registers...
49 */
50static int __devinit hplance_init_one(struct dio_dev *d,
51 const struct dio_device_id *ent);
52static void __devinit hplance_init(struct net_device *dev,
53 struct dio_dev *d);
54static void __devexit hplance_remove_one(struct dio_dev *d);
55static void hplance_writerap(void *priv, unsigned short value);
56static void hplance_writerdp(void *priv, unsigned short value);
57static unsigned short hplance_readrdp(void *priv);
58static int hplance_open(struct net_device *dev);
59static int hplance_close(struct net_device *dev);
60
61static struct dio_device_id hplance_dio_tbl[] = {
62 { DIO_ID_LAN },
63 { 0 }
64};
65
66static struct dio_driver hplance_driver = {
67 .name = "hplance",
68 .id_table = hplance_dio_tbl,
69 .probe = hplance_init_one,
70 .remove = __devexit_p(hplance_remove_one),
71};
72
73static const struct net_device_ops hplance_netdev_ops = {
74 .ndo_open = hplance_open,
75 .ndo_stop = hplance_close,
76 .ndo_start_xmit = lance_start_xmit,
77 .ndo_set_multicast_list = lance_set_multicast,
78 .ndo_change_mtu = eth_change_mtu,
79 .ndo_validate_addr = eth_validate_addr,
80 .ndo_set_mac_address = eth_mac_addr,
81#ifdef CONFIG_NET_POLL_CONTROLLER
82 .ndo_poll_controller = lance_poll,
83#endif
84};
85
86/* Find all the HP Lance boards and initialise them... */
87static int __devinit hplance_init_one(struct dio_dev *d,
88 const struct dio_device_id *ent)
89{
90 struct net_device *dev;
91 int err = -ENOMEM;
92 int i;
93
94 dev = alloc_etherdev(sizeof(struct hplance_private));
95 if (!dev)
96 goto out;
97
98 err = -EBUSY;
99 if (!request_mem_region(dio_resource_start(d),
100 dio_resource_len(d), d->name))
101 goto out_free_netdev;
102
103 hplance_init(dev, d);
104 err = register_netdev(dev);
105 if (err)
106 goto out_release_mem_region;
107
108 dio_set_drvdata(d, dev);
109
110 printk(KERN_INFO "%s: %s; select code %d, addr %2.2x", dev->name, d->name, d->scode, dev->dev_addr[0]);
111
112 for (i=1; i<6; i++) {
113 printk(":%2.2x", dev->dev_addr[i]);
114 }
115
116 printk(", irq %d\n", d->ipl);
117
118 return 0;
119
120 out_release_mem_region:
121 release_mem_region(dio_resource_start(d), dio_resource_len(d));
122 out_free_netdev:
123 free_netdev(dev);
124 out:
125 return err;
126}
127
128static void __devexit hplance_remove_one(struct dio_dev *d)
129{
130 struct net_device *dev = dio_get_drvdata(d);
131
132 unregister_netdev(dev);
133 release_mem_region(dio_resource_start(d), dio_resource_len(d));
134 free_netdev(dev);
135}
136
137/* Initialise a single lance board at the given DIO device */
138static void __devinit hplance_init(struct net_device *dev, struct dio_dev *d)
139{
140 unsigned long va = (d->resource.start + DIO_VIRADDRBASE);
141 struct hplance_private *lp;
142 int i;
143
144 /* reset the board */
145 out_8(va+DIO_IDOFF, 0xff);
146 udelay(100); /* ariba! ariba! udelay! udelay! */
147
148 /* Fill the dev fields */
149 dev->base_addr = va;
150 dev->netdev_ops = &hplance_netdev_ops;
151 dev->dma = 0;
152
153 for (i=0; i<6; i++) {
154 /* The NVRAM holds our ethernet address, one nibble per byte,
155 * at bytes NVRAMOFF+1,3,5,7,9...
156 */
157 dev->dev_addr[i] = ((in_8(va + HPLANCE_NVRAMOFF + i*4 + 1) & 0xF) << 4)
158 | (in_8(va + HPLANCE_NVRAMOFF + i*4 + 3) & 0xF);
159 }
160
161 lp = netdev_priv(dev);
162 lp->lance.name = (char*)d->name; /* discards const, shut up gcc */
163 lp->lance.base = va;
164 lp->lance.init_block = (struct lance_init_block *)(va + HPLANCE_MEMOFF); /* CPU addr */
165 lp->lance.lance_init_block = NULL; /* LANCE addr of same RAM */
166 lp->lance.busmaster_regval = LE_C3_BSWP; /* we're bigendian */
167 lp->lance.irq = d->ipl;
168 lp->lance.writerap = hplance_writerap;
169 lp->lance.writerdp = hplance_writerdp;
170 lp->lance.readrdp = hplance_readrdp;
171 lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS;
172 lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS;
173 lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK;
174 lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK;
175}
176
177/* This is disgusting. We have to check the DIO status register for ack every
178 * time we read or write the LANCE registers.
179 */
180static void hplance_writerap(void *priv, unsigned short value)
181{
182 struct lance_private *lp = (struct lance_private *)priv;
183 do {
184 out_be16(lp->base + HPLANCE_REGOFF + LANCE_RAP, value);
185 } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
186}
187
188static void hplance_writerdp(void *priv, unsigned short value)
189{
190 struct lance_private *lp = (struct lance_private *)priv;
191 do {
192 out_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP, value);
193 } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
194}
195
196static unsigned short hplance_readrdp(void *priv)
197{
198 struct lance_private *lp = (struct lance_private *)priv;
199 __u16 value;
200 do {
201 value = in_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP);
202 } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
203 return value;
204}
205
206static int hplance_open(struct net_device *dev)
207{
208 int status;
209 struct lance_private *lp = netdev_priv(dev);
210
211 status = lance_open(dev); /* call generic lance open code */
212 if (status)
213 return status;
214 /* enable interrupts at board level. */
215 out_8(lp->base + HPLANCE_STATUS, LE_IE);
216
217 return 0;
218}
219
220static int hplance_close(struct net_device *dev)
221{
222 struct lance_private *lp = netdev_priv(dev);
223
224 out_8(lp->base + HPLANCE_STATUS, 0); /* disable interrupts at boardlevel */
225 lance_close(dev);
226 return 0;
227}
228
229static int __init hplance_init_module(void)
230{
231 return dio_register_driver(&hplance_driver);
232}
233
234static void __exit hplance_cleanup_module(void)
235{
236 dio_unregister_driver(&hplance_driver);
237}
238
239module_init(hplance_init_module);
240module_exit(hplance_cleanup_module);
241
242MODULE_LICENSE("GPL");