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/string.h>
14 #include <linux/delay.h>
15 #include <linux/init.h>
16 #include <linux/errno.h>
17 #include <linux/gfp.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/io.h>
26 #include <asm/pgtable.h>
27 #include <asm/mvme147hw.h>
28
29 /* We have 16834 bytes of RAM for the init block and buffers. This places
30 * an upper limit on the number of buffers we can use. NetBSD uses 8 Rx
31 * buffers and 2 Tx buffers.
32 */
33 #define LANCE_LOG_TX_BUFFERS 1
34 #define LANCE_LOG_RX_BUFFERS 3
35
36 #include "7990.h" /* use generic LANCE code */
37
38 /* Our private data structure */
39 struct m147lance_private {
40 struct lance_private lance;
41 unsigned long ram;
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 */
49 static int m147lance_open(struct net_device *dev);
50 static int m147lance_close(struct net_device *dev);
51 static void m147lance_writerap(struct lance_private *lp, unsigned short value);
52 static void m147lance_writerdp(struct lance_private *lp, unsigned short value);
53 static unsigned short m147lance_readrdp(struct lance_private *lp);
54
55 typedef void (*writerap_t)(void *, unsigned short);
56 typedef void (*writerdp_t)(void *, unsigned short);
57 typedef unsigned short (*readrdp_t)(void *);
58
59 static const struct net_device_ops lance_netdev_ops = {
60 .ndo_open = m147lance_open,
61 .ndo_stop = m147lance_close,
62 .ndo_start_xmit = lance_start_xmit,
63 .ndo_set_rx_mode = lance_set_multicast,
64 .ndo_tx_timeout = lance_tx_timeout,
65 .ndo_change_mtu = eth_change_mtu,
66 .ndo_validate_addr = eth_validate_addr,
67 .ndo_set_mac_address = eth_mac_addr,
68 };
69
70 /* Initialise the one and only on-board 7990 */
mvme147lance_probe(int unit)71 struct net_device * __init mvme147lance_probe(int unit)
72 {
73 struct net_device *dev;
74 static int called;
75 static const char name[] = "MVME147 LANCE";
76 struct m147lance_private *lp;
77 u_long *addr;
78 u_long address;
79 int err;
80
81 if (!MACH_IS_MVME147 || called)
82 return ERR_PTR(-ENODEV);
83 called++;
84
85 dev = alloc_etherdev(sizeof(struct m147lance_private));
86 if (!dev)
87 return ERR_PTR(-ENOMEM);
88
89 if (unit >= 0)
90 sprintf(dev->name, "eth%d", unit);
91
92 /* Fill the dev fields */
93 dev->base_addr = (unsigned long)MVME147_LANCE_BASE;
94 dev->netdev_ops = &lance_netdev_ops;
95 dev->dma = 0;
96
97 addr=(u_long *)ETHERNET_ADDRESS;
98 address = *addr;
99 dev->dev_addr[0]=0x08;
100 dev->dev_addr[1]=0x00;
101 dev->dev_addr[2]=0x3e;
102 address=address>>8;
103 dev->dev_addr[5]=address&0xff;
104 address=address>>8;
105 dev->dev_addr[4]=address&0xff;
106 address=address>>8;
107 dev->dev_addr[3]=address&0xff;
108
109 printk("%s: MVME147 at 0x%08lx, irq %d, "
110 "Hardware Address %pM\n",
111 dev->name, dev->base_addr, MVME147_LANCE_IRQ,
112 dev->dev_addr);
113
114 lp = netdev_priv(dev);
115 lp->ram = __get_dma_pages(GFP_ATOMIC, 3); /* 16K */
116 if (!lp->ram)
117 {
118 printk("%s: No memory for LANCE buffers\n", dev->name);
119 free_netdev(dev);
120 return ERR_PTR(-ENOMEM);
121 }
122
123 lp->lance.name = (char*)name; /* discards const, shut up gcc */
124 lp->lance.base = dev->base_addr;
125 lp->lance.init_block = (struct lance_init_block *)(lp->ram); /* CPU addr */
126 lp->lance.lance_init_block = (struct lance_init_block *)(lp->ram); /* LANCE addr of same RAM */
127 lp->lance.busmaster_regval = LE_C3_BSWP; /* we're bigendian */
128 lp->lance.irq = MVME147_LANCE_IRQ;
129 lp->lance.writerap = (writerap_t)m147lance_writerap;
130 lp->lance.writerdp = (writerdp_t)m147lance_writerdp;
131 lp->lance.readrdp = (readrdp_t)m147lance_readrdp;
132 lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS;
133 lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS;
134 lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK;
135 lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK;
136
137 err = register_netdev(dev);
138 if (err) {
139 free_pages(lp->ram, 3);
140 free_netdev(dev);
141 return ERR_PTR(err);
142 }
143
144 return dev;
145 }
146
m147lance_writerap(struct lance_private * lp,unsigned short value)147 static void m147lance_writerap(struct lance_private *lp, unsigned short value)
148 {
149 out_be16(lp->base + LANCE_RAP, value);
150 }
151
m147lance_writerdp(struct lance_private * lp,unsigned short value)152 static void m147lance_writerdp(struct lance_private *lp, unsigned short value)
153 {
154 out_be16(lp->base + LANCE_RDP, value);
155 }
156
m147lance_readrdp(struct lance_private * lp)157 static unsigned short m147lance_readrdp(struct lance_private *lp)
158 {
159 return in_be16(lp->base + LANCE_RDP);
160 }
161
m147lance_open(struct net_device * dev)162 static int m147lance_open(struct net_device *dev)
163 {
164 int status;
165
166 status = lance_open(dev); /* call generic lance open code */
167 if (status)
168 return status;
169 /* enable interrupts at board level. */
170 m147_pcc->lan_cntrl=0; /* clear the interrupts (if any) */
171 m147_pcc->lan_cntrl=0x08 | 0x04; /* Enable irq 4 */
172
173 return 0;
174 }
175
m147lance_close(struct net_device * dev)176 static int m147lance_close(struct net_device *dev)
177 {
178 /* disable interrupts at boardlevel */
179 m147_pcc->lan_cntrl=0x0; /* disable interrupts */
180 lance_close(dev);
181 return 0;
182 }
183
184 #ifdef MODULE
185 MODULE_LICENSE("GPL");
186
187 static struct net_device *dev_mvme147_lance;
init_module(void)188 int __init init_module(void)
189 {
190 dev_mvme147_lance = mvme147lance_probe(-1);
191 if (IS_ERR(dev_mvme147_lance))
192 return PTR_ERR(dev_mvme147_lance);
193 return 0;
194 }
195
cleanup_module(void)196 void __exit cleanup_module(void)
197 {
198 struct m147lance_private *lp = netdev_priv(dev_mvme147_lance);
199 unregister_netdev(dev_mvme147_lance);
200 free_pages(lp->ram, 3);
201 free_netdev(dev_mvme147_lance);
202 }
203
204 #endif /* MODULE */
205