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