1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* mvme147.c : the Linux/mvme147/lance ethernet driver |
3 | * |
4 | * Copyright (C) 05/1998 Peter Maydell <pmaydell@chiark.greenend.org.uk> |
5 | * Based on the Sun Lance driver and the NetBSD HP Lance driver |
6 | * Uses the generic 7990.c LANCE code. |
7 | */ |
8 | |
9 | #include <linux/module.h> |
10 | #include <linux/kernel.h> |
11 | #include <linux/types.h> |
12 | #include <linux/interrupt.h> |
13 | #include <linux/ioport.h> |
14 | #include <linux/string.h> |
15 | #include <linux/delay.h> |
16 | #include <linux/init.h> |
17 | #include <linux/errno.h> |
18 | #include <linux/gfp.h> |
19 | #include <linux/pgtable.h> |
20 | /* Used for the temporal inet entries and routing */ |
21 | #include <linux/socket.h> |
22 | #include <linux/route.h> |
23 | #include <linux/netdevice.h> |
24 | #include <linux/etherdevice.h> |
25 | #include <linux/skbuff.h> |
26 | |
27 | #include <asm/io.h> |
28 | #include <asm/mvme147hw.h> |
29 | |
30 | /* We have 32K 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, it takes (8 + 2) * 1544 bytes. |
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 | static const struct net_device_ops lance_netdev_ops = { |
61 | .ndo_open = m147lance_open, |
62 | .ndo_stop = m147lance_close, |
63 | .ndo_start_xmit = lance_start_xmit, |
64 | .ndo_set_rx_mode = lance_set_multicast, |
65 | .ndo_tx_timeout = lance_tx_timeout, |
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 */ |
71 | static struct net_device * __init mvme147lance_probe(void) |
72 | { |
73 | struct net_device *dev; |
74 | static int called; |
75 | static const char name[] = "MVME147 LANCE" ; |
76 | struct m147lance_private *lp; |
77 | u8 macaddr[ETH_ALEN]; |
78 | u_long *addr; |
79 | u_long address; |
80 | int err; |
81 | |
82 | if (!MACH_IS_MVME147 || called) |
83 | return ERR_PTR(error: -ENODEV); |
84 | called++; |
85 | |
86 | dev = alloc_etherdev(sizeof(struct m147lance_private)); |
87 | if (!dev) |
88 | return ERR_PTR(error: -ENOMEM); |
89 | |
90 | /* Fill the dev fields */ |
91 | dev->base_addr = (unsigned long)MVME147_LANCE_BASE; |
92 | dev->netdev_ops = &lance_netdev_ops; |
93 | dev->dma = 0; |
94 | |
95 | addr = (u_long *)ETHERNET_ADDRESS; |
96 | address = *addr; |
97 | macaddr[0] = 0x08; |
98 | macaddr[1] = 0x00; |
99 | macaddr[2] = 0x3e; |
100 | address = address >> 8; |
101 | macaddr[5] = address&0xff; |
102 | address = address >> 8; |
103 | macaddr[4] = address&0xff; |
104 | address = address >> 8; |
105 | macaddr[3] = address&0xff; |
106 | eth_hw_addr_set(dev, addr: macaddr); |
107 | |
108 | printk("%s: MVME147 at 0x%08lx, irq %d, Hardware Address %pM\n" , |
109 | dev->name, dev->base_addr, MVME147_LANCE_IRQ, |
110 | dev->dev_addr); |
111 | |
112 | lp = netdev_priv(dev); |
113 | lp->ram = __get_dma_pages(GFP_ATOMIC, 3); /* 32K */ |
114 | if (!lp->ram) { |
115 | printk("%s: No memory for LANCE buffers\n" , dev->name); |
116 | free_netdev(dev); |
117 | return ERR_PTR(error: -ENOMEM); |
118 | } |
119 | |
120 | lp->lance.name = name; |
121 | lp->lance.base = dev->base_addr; |
122 | lp->lance.init_block = (struct lance_init_block *)(lp->ram); /* CPU addr */ |
123 | lp->lance.lance_init_block = (struct lance_init_block *)(lp->ram); /* LANCE addr of same RAM */ |
124 | lp->lance.busmaster_regval = LE_C3_BSWP; /* we're bigendian */ |
125 | lp->lance.irq = MVME147_LANCE_IRQ; |
126 | lp->lance.writerap = (writerap_t)m147lance_writerap; |
127 | lp->lance.writerdp = (writerdp_t)m147lance_writerdp; |
128 | lp->lance.readrdp = (readrdp_t)m147lance_readrdp; |
129 | lp->lance.lance_log_rx_bufs = LANCE_LOG_RX_BUFFERS; |
130 | lp->lance.lance_log_tx_bufs = LANCE_LOG_TX_BUFFERS; |
131 | lp->lance.rx_ring_mod_mask = RX_RING_MOD_MASK; |
132 | lp->lance.tx_ring_mod_mask = TX_RING_MOD_MASK; |
133 | |
134 | err = register_netdev(dev); |
135 | if (err) { |
136 | free_pages(addr: lp->ram, order: 3); |
137 | free_netdev(dev); |
138 | return ERR_PTR(error: err); |
139 | } |
140 | |
141 | return dev; |
142 | } |
143 | |
144 | static void m147lance_writerap(struct lance_private *lp, unsigned short value) |
145 | { |
146 | out_be16(lp->base + LANCE_RAP, value); |
147 | } |
148 | |
149 | static void m147lance_writerdp(struct lance_private *lp, unsigned short value) |
150 | { |
151 | out_be16(lp->base + LANCE_RDP, value); |
152 | } |
153 | |
154 | static unsigned short m147lance_readrdp(struct lance_private *lp) |
155 | { |
156 | return in_be16(lp->base + LANCE_RDP); |
157 | } |
158 | |
159 | static int m147lance_open(struct net_device *dev) |
160 | { |
161 | int status; |
162 | |
163 | status = lance_open(dev); /* call generic lance open code */ |
164 | if (status) |
165 | return status; |
166 | /* enable interrupts at board level. */ |
167 | m147_pcc->lan_cntrl = 0; /* clear the interrupts (if any) */ |
168 | m147_pcc->lan_cntrl = 0x08 | 0x04; /* Enable irq 4 */ |
169 | |
170 | return 0; |
171 | } |
172 | |
173 | static int m147lance_close(struct net_device *dev) |
174 | { |
175 | /* disable interrupts at boardlevel */ |
176 | m147_pcc->lan_cntrl = 0x0; /* disable interrupts */ |
177 | lance_close(dev); |
178 | return 0; |
179 | } |
180 | |
181 | MODULE_LICENSE("GPL" ); |
182 | |
183 | static struct net_device *dev_mvme147_lance; |
184 | static int __init m147lance_init(void) |
185 | { |
186 | dev_mvme147_lance = mvme147lance_probe(); |
187 | return PTR_ERR_OR_ZERO(ptr: dev_mvme147_lance); |
188 | } |
189 | module_init(m147lance_init); |
190 | |
191 | static void __exit m147lance_exit(void) |
192 | { |
193 | struct m147lance_private *lp = netdev_priv(dev: dev_mvme147_lance); |
194 | unregister_netdev(dev: dev_mvme147_lance); |
195 | free_pages(addr: lp->ram, order: 3); |
196 | free_netdev(dev: dev_mvme147_lance); |
197 | } |
198 | module_exit(m147lance_exit); |
199 | |