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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> | |
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 */ | |
40 | struct 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 | */ | |
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); | |
55 | ||
56 | typedef void (*writerap_t)(void *, unsigned short); | |
57 | typedef void (*writerdp_t)(void *, unsigned short); | |
58 | typedef unsigned short (*readrdp_t)(void *); | |
59 | ||
60 | /* Initialise the one and only on-board 7990 */ | |
61 | struct 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 | ||
146 | static void m147lance_writerap(struct lance_private *lp, unsigned short value) | |
147 | { | |
148 | out_be16(lp->base + LANCE_RAP, value); | |
149 | } | |
150 | ||
151 | static void m147lance_writerdp(struct lance_private *lp, unsigned short value) | |
152 | { | |
153 | out_be16(lp->base + LANCE_RDP, value); | |
154 | } | |
155 | ||
156 | static unsigned short m147lance_readrdp(struct lance_private *lp) | |
157 | { | |
158 | return in_be16(lp->base + LANCE_RDP); | |
159 | } | |
160 | ||
161 | static 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 | ||
175 | static 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 | |
184 | MODULE_LICENSE("GPL"); | |
185 | ||
186 | static struct net_device *dev_mvme147_lance; | |
187 | int 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 | ||
195 | void 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 */ |