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git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - drivers/net/mvme147.c
1 /* mvme147.c : the Linux/mvme147/lance ethernet driver
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.
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>
25 #include <asm/system.h>
27 #include <asm/pgtable.h>
28 #include <asm/mvme147hw.h>
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.
34 #define LANCE_LOG_TX_BUFFERS 1
35 #define LANCE_LOG_RX_BUFFERS 3
37 #include "7990.h" /* use generic LANCE code */
39 /* Our private data structure */
40 struct m147lance_private
{
41 struct lance_private lance
;
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...
50 static int m147lance_open(struct net_device
*dev
);
51 static int m147lance_close(struct net_device
*dev
);
52 static void m147lance_writerap(struct lance_private
*lp
, unsigned short value
);
53 static void m147lance_writerdp(struct lance_private
*lp
, unsigned short value
);
54 static unsigned short m147lance_readrdp(struct lance_private
*lp
);
56 typedef void (*writerap_t
)(void *, unsigned short);
57 typedef void (*writerdp_t
)(void *, unsigned short);
58 typedef unsigned short (*readrdp_t
)(void *);
60 /* Initialise the one and only on-board 7990 */
61 struct net_device
* __init
mvme147lance_probe(int unit
)
63 struct net_device
*dev
;
65 static const char name
[] = "MVME147 LANCE";
66 struct m147lance_private
*lp
;
71 if (!MACH_IS_MVME147
|| called
)
72 return ERR_PTR(-ENODEV
);
75 dev
= alloc_etherdev(sizeof(struct m147lance_private
));
77 return ERR_PTR(-ENOMEM
);
80 sprintf(dev
->name
, "eth%d", unit
);
82 SET_MODULE_OWNER(dev
);
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
;
94 addr
=(u_long
*)ETHERNET_ADDRESS
;
96 dev
->dev_addr
[0]=0x08;
97 dev
->dev_addr
[1]=0x00;
98 dev
->dev_addr
[2]=0x3e;
100 dev
->dev_addr
[5]=address
&0xff;
102 dev
->dev_addr
[4]=address
&0xff;
104 dev
->dev_addr
[3]=address
&0xff;
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
,
109 dev
->dev_addr
[1], dev
->dev_addr
[2],
110 dev
->dev_addr
[3], dev
->dev_addr
[4],
113 lp
= (struct m147lance_private
*)dev
->priv
;
114 lp
->ram
= __get_dma_pages(GFP_ATOMIC
, 3); /* 16K */
117 printk("%s: No memory for LANCE buffers\n", dev
->name
);
119 return ERR_PTR(-ENOMEM
);
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
;
136 err
= register_netdev(dev
);
138 free_pages(lp
->ram
, 3);
146 static void m147lance_writerap(struct lance_private
*lp
, unsigned short value
)
148 out_be16(lp
->base
+ LANCE_RAP
, value
);
151 static void m147lance_writerdp(struct lance_private
*lp
, unsigned short value
)
153 out_be16(lp
->base
+ LANCE_RDP
, value
);
156 static unsigned short m147lance_readrdp(struct lance_private
*lp
)
158 return in_be16(lp
->base
+ LANCE_RDP
);
161 static int m147lance_open(struct net_device
*dev
)
165 status
= lance_open(dev
); /* call generic lance open code */
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 */
175 static int m147lance_close(struct net_device
*dev
)
177 /* disable interrupts at boardlevel */
178 m147_pcc
->lan_cntrl
=0x0; /* disable interrupts */
184 MODULE_LICENSE("GPL");
186 static struct net_device
*dev_mvme147_lance
;
187 int init_module(void)
189 dev_mvme147_lance
= mvme147lance_probe(-1);
190 if (IS_ERR(dev_mvme147_lance
))
191 return PTR_ERR(dev_mvme147_lance
);
195 void cleanup_module(void)
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
);