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1da177e4 LT |
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> | |
1da177e4 LT |
13 | #include <linux/string.h> |
14 | #include <linux/delay.h> | |
15 | #include <linux/init.h> | |
16 | #include <linux/errno.h> | |
5a0e3ad6 | 17 | #include <linux/gfp.h> |
1da177e4 LT |
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 | ||
1da177e4 LT |
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 | ||
96cd55ea AB |
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, | |
afc4b13d | 63 | .ndo_set_rx_mode = lance_set_multicast, |
96cd55ea AB |
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 | ||
1da177e4 LT |
70 | /* Initialise the one and only on-board 7990 */ |
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 | ||
1da177e4 LT |
92 | /* Fill the dev fields */ |
93 | dev->base_addr = (unsigned long)MVME147_LANCE_BASE; | |
96cd55ea | 94 | dev->netdev_ops = &lance_netdev_ops; |
1da177e4 LT |
95 | dev->dma = 0; |
96 | ||
a8ab77a8 | 97 | addr = (u_long *)ETHERNET_ADDRESS; |
1da177e4 | 98 | address = *addr; |
a8ab77a8 GU |
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, Hardware Address %pM\n", | |
0795af57 | 110 | dev->name, dev->base_addr, MVME147_LANCE_IRQ, |
e174961c | 111 | dev->dev_addr); |
1da177e4 | 112 | |
4cf1653a | 113 | lp = netdev_priv(dev); |
1da177e4 | 114 | lp->ram = __get_dma_pages(GFP_ATOMIC, 3); /* 16K */ |
a8ab77a8 | 115 | if (!lp->ram) { |
1da177e4 LT |
116 | printk("%s: No memory for LANCE buffers\n", dev->name); |
117 | free_netdev(dev); | |
118 | return ERR_PTR(-ENOMEM); | |
119 | } | |
120 | ||
4ffa8fcd | 121 | lp->lance.name = name; |
1da177e4 LT |
122 | lp->lance.base = dev->base_addr; |
123 | lp->lance.init_block = (struct lance_init_block *)(lp->ram); /* CPU addr */ | |
124 | lp->lance.lance_init_block = (struct lance_init_block *)(lp->ram); /* LANCE addr of same RAM */ | |
125 | lp->lance.busmaster_regval = LE_C3_BSWP; /* we're bigendian */ | |
126 | lp->lance.irq = MVME147_LANCE_IRQ; | |
127 | lp->lance.writerap = (writerap_t)m147lance_writerap; | |
128 | lp->lance.writerdp = (writerdp_t)m147lance_writerdp; | |
129 | lp->lance.readrdp = (readrdp_t)m147lance_readrdp; | |
130 | lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS; | |
131 | lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS; | |
132 | lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK; | |
133 | lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK; | |
134 | ||
135 | err = register_netdev(dev); | |
136 | if (err) { | |
137 | free_pages(lp->ram, 3); | |
138 | free_netdev(dev); | |
139 | return ERR_PTR(err); | |
140 | } | |
141 | ||
142 | return dev; | |
143 | } | |
144 | ||
145 | static void m147lance_writerap(struct lance_private *lp, unsigned short value) | |
146 | { | |
147 | out_be16(lp->base + LANCE_RAP, value); | |
148 | } | |
149 | ||
150 | static void m147lance_writerdp(struct lance_private *lp, unsigned short value) | |
151 | { | |
152 | out_be16(lp->base + LANCE_RDP, value); | |
153 | } | |
154 | ||
155 | static unsigned short m147lance_readrdp(struct lance_private *lp) | |
156 | { | |
157 | return in_be16(lp->base + LANCE_RDP); | |
158 | } | |
159 | ||
160 | static int m147lance_open(struct net_device *dev) | |
161 | { | |
162 | int status; | |
163 | ||
164 | status = lance_open(dev); /* call generic lance open code */ | |
165 | if (status) | |
166 | return status; | |
167 | /* enable interrupts at board level. */ | |
a8ab77a8 GU |
168 | m147_pcc->lan_cntrl = 0; /* clear the interrupts (if any) */ |
169 | m147_pcc->lan_cntrl = 0x08 | 0x04; /* Enable irq 4 */ | |
1da177e4 LT |
170 | |
171 | return 0; | |
172 | } | |
173 | ||
174 | static int m147lance_close(struct net_device *dev) | |
175 | { | |
176 | /* disable interrupts at boardlevel */ | |
a8ab77a8 | 177 | m147_pcc->lan_cntrl = 0x0; /* disable interrupts */ |
1da177e4 LT |
178 | lance_close(dev); |
179 | return 0; | |
180 | } | |
181 | ||
182 | #ifdef MODULE | |
183 | MODULE_LICENSE("GPL"); | |
184 | ||
185 | static struct net_device *dev_mvme147_lance; | |
afc8eb46 | 186 | int __init init_module(void) |
1da177e4 LT |
187 | { |
188 | dev_mvme147_lance = mvme147lance_probe(-1); | |
8c6ffba0 | 189 | return PTR_ERR_OR_ZERO(dev_mvme147_lance); |
1da177e4 LT |
190 | } |
191 | ||
afc8eb46 | 192 | void __exit cleanup_module(void) |
1da177e4 | 193 | { |
4cf1653a | 194 | struct m147lance_private *lp = netdev_priv(dev_mvme147_lance); |
1da177e4 LT |
195 | unregister_netdev(dev_mvme147_lance); |
196 | free_pages(lp->ram, 3); | |
197 | free_netdev(dev_mvme147_lance); | |
198 | } | |
199 | ||
200 | #endif /* MODULE */ |