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Diffstat (limited to 'drivers/net/mvme147.c')
-rw-r--r--drivers/net/mvme147.c203
1 files changed, 203 insertions, 0 deletions
diff --git a/drivers/net/mvme147.c b/drivers/net/mvme147.c
new file mode 100644
index 000000000000..56a82d8ee8f5
--- /dev/null
+++ b/drivers/net/mvme147.c
@@ -0,0 +1,203 @@
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
71 if (!MACH_IS_MVME147 || called)
72 return ERR_PTR(-ENODEV);
73 called++;
74
75 dev = alloc_etherdev(sizeof(struct m147lance_private));
76 if (!dev)
77 return ERR_PTR(-ENOMEM);
78
79 if (unit >= 0)
80 sprintf(dev->name, "eth%d", unit);
81
82 SET_MODULE_OWNER(dev);
83
84 /* Fill the dev fields */
85 dev->base_addr = (unsigned long)MVME147_LANCE_BASE;
86 dev->open = &m147lance_open;
87 dev->stop = &m147lance_close;
88 dev->hard_start_xmit = &lance_start_xmit;
89 dev->get_stats = &lance_get_stats;
90 dev->set_multicast_list = &lance_set_multicast;
91 dev->tx_timeout = &lance_tx_timeout;
92 dev->dma = 0;
93
94 addr=(u_long *)ETHERNET_ADDRESS;
95 address = *addr;
96 dev->dev_addr[0]=0x08;
97 dev->dev_addr[1]=0x00;
98 dev->dev_addr[2]=0x3e;
99 address=address>>8;
100 dev->dev_addr[5]=address&0xff;
101 address=address>>8;
102 dev->dev_addr[4]=address&0xff;
103 address=address>>8;
104 dev->dev_addr[3]=address&0xff;
105
106 printk("%s: MVME147 at 0x%08lx, irq %d, Hardware Address %02x:%02x:%02x:%02x:%02x:%02x\n",
107 dev->name, dev->base_addr, MVME147_LANCE_IRQ,
108 dev->dev_addr[0],
109 dev->dev_addr[1], dev->dev_addr[2],
110 dev->dev_addr[3], dev->dev_addr[4],
111 dev->dev_addr[5]);
112
113 lp = (struct m147lance_private *)dev->priv;
114 lp->ram = __get_dma_pages(GFP_ATOMIC, 3); /* 16K */
115 if (!lp->ram)
116 {
117 printk("%s: No memory for LANCE buffers\n", dev->name);
118 free_netdev(dev);
119 return ERR_PTR(-ENOMEM);
120 }
121
122 lp->lance.name = (char*)name; /* discards const, shut up gcc */
123 lp->lance.base = dev->base_addr;
124 lp->lance.init_block = (struct lance_init_block *)(lp->ram); /* CPU addr */
125 lp->lance.lance_init_block = (struct lance_init_block *)(lp->ram); /* LANCE addr of same RAM */
126 lp->lance.busmaster_regval = LE_C3_BSWP; /* we're bigendian */
127 lp->lance.irq = MVME147_LANCE_IRQ;
128 lp->lance.writerap = (writerap_t)m147lance_writerap;
129 lp->lance.writerdp = (writerdp_t)m147lance_writerdp;
130 lp->lance.readrdp = (readrdp_t)m147lance_readrdp;
131 lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS;
132 lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS;
133 lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK;
134 lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK;
135
136 err = register_netdev(dev);
137 if (err) {
138 free_pages(lp->ram, 3);
139 free_netdev(dev);
140 return ERR_PTR(err);
141 }
142
143 return dev;
144}
145
146static void m147lance_writerap(struct lance_private *lp, unsigned short value)
147{
148 out_be16(lp->base + LANCE_RAP, value);
149}
150
151static void m147lance_writerdp(struct lance_private *lp, unsigned short value)
152{
153 out_be16(lp->base + LANCE_RDP, value);
154}
155
156static unsigned short m147lance_readrdp(struct lance_private *lp)
157{
158 return in_be16(lp->base + LANCE_RDP);
159}
160
161static int m147lance_open(struct net_device *dev)
162{
163 int status;
164
165 status = lance_open(dev); /* call generic lance open code */
166 if (status)
167 return status;
168 /* enable interrupts at board level. */
169 m147_pcc->lan_cntrl=0; /* clear the interrupts (if any) */
170 m147_pcc->lan_cntrl=0x08 | 0x04; /* Enable irq 4 */
171
172 return 0;
173}
174
175static int m147lance_close(struct net_device *dev)
176{
177 /* disable interrupts at boardlevel */
178 m147_pcc->lan_cntrl=0x0; /* disable interrupts */
179 lance_close(dev);
180 return 0;
181}
182
183#ifdef MODULE
184MODULE_LICENSE("GPL");
185
186static struct net_device *dev_mvme147_lance;
187int init_module(void)
188{
189 dev_mvme147_lance = mvme147lance_probe(-1);
190 if (IS_ERR(dev_mvme147_lance))
191 return PTR_ERR(dev_mvme147_lance);
192 return 0;
193}
194
195void cleanup_module(void)
196{
197 struct m147lance_private *lp = dev_mvme147_lance->priv;
198 unregister_netdev(dev_mvme147_lance);
199 free_pages(lp->ram, 3);
200 free_netdev(dev_mvme147_lance);
201}
202
203#endif /* MODULE */
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