tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* mvme147.c : the Linux/mvme147/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/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#include <asm/mvme147hw.h>
29
30/* We have 16834 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.
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 m147lance_private {
41 struct lance_private lance;
42 unsigned long ram;
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 m147lance_open(struct net_device *dev);
51static int m147lance_close(struct net_device *dev);
52static void m147lance_writerap(struct lance_private *lp, unsigned short value);
53static void m147lance_writerdp(struct lance_private *lp, unsigned short value);
54static unsigned short m147lance_readrdp(struct lance_private *lp);
55
56typedef void (*writerap_t)(void *, unsigned short);
57typedef void (*writerdp_t)(void *, unsigned short);
58typedef unsigned short (*readrdp_t)(void *);
59
60/* Initialise the one and only on-board 7990 */
61struct net_device * __init mvme147lance_probe(int unit)
62{
63 struct net_device *dev;
64 static int called;
65 static const char name[] = "MVME147 LANCE";
66 struct m147lance_private *lp;
67 u_long *addr;
68 u_long address;
69 int err;
70 DECLARE_MAC_BUF(mac);
71
72 if (!MACH_IS_MVME147 || called)
73 return ERR_PTR(-ENODEV);
74 called++;
75
76 dev = alloc_etherdev(sizeof(struct m147lance_private));
77 if (!dev)
78 return ERR_PTR(-ENOMEM);
79
80 if (unit >= 0)
81 sprintf(dev->name, "eth%d", unit);
82
83 /* Fill the dev fields */
84 dev->base_addr = (unsigned long)MVME147_LANCE_BASE;
85 dev->open = &m147lance_open;
86 dev->stop = &m147lance_close;
87 dev->hard_start_xmit = &lance_start_xmit;
88 dev->set_multicast_list = &lance_set_multicast;
89 dev->tx_timeout = &lance_tx_timeout;
90 dev->dma = 0;
91
92 addr=(u_long *)ETHERNET_ADDRESS;
93 address = *addr;
94 dev->dev_addr[0]=0x08;
95 dev->dev_addr[1]=0x00;
96 dev->dev_addr[2]=0x3e;
97 address=address>>8;
98 dev->dev_addr[5]=address&0xff;
99 address=address>>8;
100 dev->dev_addr[4]=address&0xff;
101 address=address>>8;
102 dev->dev_addr[3]=address&0xff;
103
104 printk("%s: MVME147 at 0x%08lx, irq %d, "
105 "Hardware Address %s\n",
106 dev->name, dev->base_addr, MVME147_LANCE_IRQ,
107 print_mac(mac, dev->dev_addr));
108
109 lp = (struct m147lance_private *)dev->priv;
110 lp->ram = __get_dma_pages(GFP_ATOMIC, 3); /* 16K */
111 if (!lp->ram)
112 {
113 printk("%s: No memory for LANCE buffers\n", dev->name);
114 free_netdev(dev);
115 return ERR_PTR(-ENOMEM);
116 }
117
118 lp->lance.name = (char*)name; /* discards const, shut up gcc */
119 lp->lance.base = dev->base_addr;
120 lp->lance.init_block = (struct lance_init_block *)(lp->ram); /* CPU addr */
121 lp->lance.lance_init_block = (struct lance_init_block *)(lp->ram); /* LANCE addr of same RAM */
122 lp->lance.busmaster_regval = LE_C3_BSWP; /* we're bigendian */
123 lp->lance.irq = MVME147_LANCE_IRQ;
124 lp->lance.writerap = (writerap_t)m147lance_writerap;
125 lp->lance.writerdp = (writerdp_t)m147lance_writerdp;
126 lp->lance.readrdp = (readrdp_t)m147lance_readrdp;
127 lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS;
128 lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS;
129 lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK;
130 lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK;
131
132 err = register_netdev(dev);
133 if (err) {
134 free_pages(lp->ram, 3);
135 free_netdev(dev);
136 return ERR_PTR(err);
137 }
138
139 return dev;
140}
141
142static void m147lance_writerap(struct lance_private *lp, unsigned short value)
143{
144 out_be16(lp->base + LANCE_RAP, value);
145}
146
147static void m147lance_writerdp(struct lance_private *lp, unsigned short value)
148{
149 out_be16(lp->base + LANCE_RDP, value);
150}
151
152static unsigned short m147lance_readrdp(struct lance_private *lp)
153{
154 return in_be16(lp->base + LANCE_RDP);
155}
156
157static int m147lance_open(struct net_device *dev)
158{
159 int status;
160
161 status = lance_open(dev); /* call generic lance open code */
162 if (status)
163 return status;
164 /* enable interrupts at board level. */
165 m147_pcc->lan_cntrl=0; /* clear the interrupts (if any) */
166 m147_pcc->lan_cntrl=0x08 | 0x04; /* Enable irq 4 */
167
168 return 0;
169}
170
171static int m147lance_close(struct net_device *dev)
172{
173 /* disable interrupts at boardlevel */
174 m147_pcc->lan_cntrl=0x0; /* disable interrupts */
175 lance_close(dev);
176 return 0;
177}
178
179#ifdef MODULE
180MODULE_LICENSE("GPL");
181
182static struct net_device *dev_mvme147_lance;
183int __init init_module(void)
184{
185 dev_mvme147_lance = mvme147lance_probe(-1);
186 if (IS_ERR(dev_mvme147_lance))
187 return PTR_ERR(dev_mvme147_lance);
188 return 0;
189}
190
191void __exit cleanup_module(void)
192{
193 struct m147lance_private *lp = dev_mvme147_lance->priv;
194 unregister_netdev(dev_mvme147_lance);
195 free_pages(lp->ram, 3);
196 free_netdev(dev_mvme147_lance);
197}
198
199#endif /* MODULE */