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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/io.h>
26#include <asm/pgtable.h>
27
28#include "hplance.h"
29
30/* We have 16392 bytes of RAM for the init block and buffers. This places
31 * an upper limit on the number of buffers we can use. NetBSD uses 8 Rx
32 * buffers and 2 Tx buffers, it takes (8 + 2) * 1544 bytes.
33 */
34#define LANCE_LOG_TX_BUFFERS 1
35#define LANCE_LOG_RX_BUFFERS 3
36
37#include "7990.h" /* use generic LANCE code */
38
39/* Our private data structure */
40struct hplance_private {
41 struct lance_private lance;
42};
43
44/* function prototypes... This is easy because all the grot is in the
45 * generic LANCE support. All we have to support is probing for boards,
46 * plus board-specific init, open and close actions.
47 * Oh, and we need to tell the generic code how to read and write LANCE registers...
48 */
49static int hplance_init_one(struct dio_dev *d, const struct dio_device_id *ent);
50static void hplance_init(struct net_device *dev, struct dio_dev *d);
51static void hplance_remove_one(struct dio_dev *d);
52static void hplance_writerap(void *priv, unsigned short value);
53static void hplance_writerdp(void *priv, unsigned short value);
54static unsigned short hplance_readrdp(void *priv);
55static int hplance_open(struct net_device *dev);
56static int hplance_close(struct net_device *dev);
57
58static struct dio_device_id hplance_dio_tbl[] = {
59 { DIO_ID_LAN },
60 { 0 }
61};
62
63static struct dio_driver hplance_driver = {
64 .name = "hplance",
65 .id_table = hplance_dio_tbl,
66 .probe = hplance_init_one,
67 .remove = hplance_remove_one,
68};
69
70static const struct net_device_ops hplance_netdev_ops = {
71 .ndo_open = hplance_open,
72 .ndo_stop = hplance_close,
73 .ndo_start_xmit = lance_start_xmit,
74 .ndo_set_rx_mode = lance_set_multicast,
75 .ndo_validate_addr = eth_validate_addr,
76 .ndo_set_mac_address = eth_mac_addr,
77#ifdef CONFIG_NET_POLL_CONTROLLER
78 .ndo_poll_controller = lance_poll,
79#endif
80};
81
82/* Find all the HP Lance boards and initialise them... */
83static int hplance_init_one(struct dio_dev *d, const struct dio_device_id *ent)
84{
85 struct net_device *dev;
86 int err = -ENOMEM;
87
88 dev = alloc_etherdev(sizeof(struct hplance_private));
89 if (!dev)
90 goto out;
91
92 err = -EBUSY;
93 if (!request_mem_region(dio_resource_start(d),
94 dio_resource_len(d), d->name))
95 goto out_free_netdev;
96
97 hplance_init(dev, d);
98 err = register_netdev(dev);
99 if (err)
100 goto out_release_mem_region;
101
102 dio_set_drvdata(d, dev);
103
104 printk(KERN_INFO "%s: %s; select code %d, addr %pM, irq %d\n",
105 dev->name, d->name, d->scode, dev->dev_addr, d->ipl);
106
107 return 0;
108
109 out_release_mem_region:
110 release_mem_region(dio_resource_start(d), dio_resource_len(d));
111 out_free_netdev:
112 free_netdev(dev);
113 out:
114 return err;
115}
116
117static void hplance_remove_one(struct dio_dev *d)
118{
119 struct net_device *dev = dio_get_drvdata(d);
120
121 unregister_netdev(dev);
122 release_mem_region(dio_resource_start(d), dio_resource_len(d));
123 free_netdev(dev);
124}
125
126/* Initialise a single lance board at the given DIO device */
127static void hplance_init(struct net_device *dev, struct dio_dev *d)
128{
129 unsigned long va = (d->resource.start + DIO_VIRADDRBASE);
130 struct hplance_private *lp;
131 int i;
132
133 /* reset the board */
134 out_8(va + DIO_IDOFF, 0xff);
135 udelay(100); /* ariba! ariba! udelay! udelay! */
136
137 /* Fill the dev fields */
138 dev->base_addr = va;
139 dev->netdev_ops = &hplance_netdev_ops;
140 dev->dma = 0;
141
142 for (i = 0; i < 6; i++) {
143 /* The NVRAM holds our ethernet address, one nibble per byte,
144 * at bytes NVRAMOFF+1,3,5,7,9...
145 */
146 dev->dev_addr[i] = ((in_8(va + HPLANCE_NVRAMOFF + i*4 + 1) & 0xF) << 4)
147 | (in_8(va + HPLANCE_NVRAMOFF + i*4 + 3) & 0xF);
148 }
149
150 lp = netdev_priv(dev);
151 lp->lance.name = d->name;
152 lp->lance.base = va;
153 lp->lance.init_block = (struct lance_init_block *)(va + HPLANCE_MEMOFF); /* CPU addr */
154 lp->lance.lance_init_block = NULL; /* LANCE addr of same RAM */
155 lp->lance.busmaster_regval = LE_C3_BSWP; /* we're bigendian */
156 lp->lance.irq = d->ipl;
157 lp->lance.writerap = hplance_writerap;
158 lp->lance.writerdp = hplance_writerdp;
159 lp->lance.readrdp = hplance_readrdp;
160 lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS;
161 lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS;
162 lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK;
163 lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK;
164}
165
166/* This is disgusting. We have to check the DIO status register for ack every
167 * time we read or write the LANCE registers.
168 */
169static void hplance_writerap(void *priv, unsigned short value)
170{
171 struct lance_private *lp = (struct lance_private *)priv;
172 do {
173 out_be16(lp->base + HPLANCE_REGOFF + LANCE_RAP, value);
174 } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
175}
176
177static void hplance_writerdp(void *priv, unsigned short value)
178{
179 struct lance_private *lp = (struct lance_private *)priv;
180 do {
181 out_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP, value);
182 } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
183}
184
185static unsigned short hplance_readrdp(void *priv)
186{
187 struct lance_private *lp = (struct lance_private *)priv;
188 __u16 value;
189 do {
190 value = in_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP);
191 } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0);
192 return value;
193}
194
195static int hplance_open(struct net_device *dev)
196{
197 int status;
198 struct lance_private *lp = netdev_priv(dev);
199
200 status = lance_open(dev); /* call generic lance open code */
201 if (status)
202 return status;
203 /* enable interrupts at board level. */
204 out_8(lp->base + HPLANCE_STATUS, LE_IE);
205
206 return 0;
207}
208
209static int hplance_close(struct net_device *dev)
210{
211 struct lance_private *lp = netdev_priv(dev);
212
213 out_8(lp->base + HPLANCE_STATUS, 0); /* disable interrupts at boardlevel */
214 lance_close(dev);
215 return 0;
216}
217
218static int __init hplance_init_module(void)
219{
220 return dio_register_driver(&hplance_driver);
221}
222
223static void __exit hplance_cleanup_module(void)
224{
225 dio_unregister_driver(&hplance_driver);
226}
227
228module_init(hplance_init_module);
229module_exit(hplance_cleanup_module);
230
231MODULE_LICENSE("GPL");