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Merge branch 'linus' into sched/core, to resolve conflicts
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1 /* stnic.c : A SH7750 specific part of driver for NS DP83902A ST-NIC.
2 *
3 * This file is subject to the terms and conditions of the GNU General Public
4 * License. See the file "COPYING" in the main directory of this archive
5 * for more details.
6 *
7 * Copyright (C) 1999 kaz Kojima
8 */
9
10 #include <linux/module.h>
11 #include <linux/kernel.h>
12 #include <linux/errno.h>
13 #include <linux/interrupt.h>
14 #include <linux/ioport.h>
15 #include <linux/netdevice.h>
16 #include <linux/etherdevice.h>
17 #include <linux/init.h>
18 #include <linux/delay.h>
19
20 #include <asm/io.h>
21 #include <mach-se/mach/se.h>
22 #include <asm/machvec.h>
23 #ifdef CONFIG_SH_STANDARD_BIOS
24 #include <asm/sh_bios.h>
25 #endif
26
27 #include "8390.h"
28
29 #define DRV_NAME "stnic"
30
31 #define byte unsigned char
32 #define half unsigned short
33 #define word unsigned int
34 #define vbyte volatile unsigned char
35 #define vhalf volatile unsigned short
36 #define vword volatile unsigned int
37
38 #define STNIC_RUN 0x01 /* 1 == Run, 0 == reset. */
39
40 #define START_PG 0 /* First page of TX buffer */
41 #define STOP_PG 128 /* Last page +1 of RX ring */
42
43 /* Alias */
44 #define STNIC_CR E8390_CMD
45 #define PG0_RSAR0 EN0_RSARLO
46 #define PG0_RSAR1 EN0_RSARHI
47 #define PG0_RBCR0 EN0_RCNTLO
48 #define PG0_RBCR1 EN0_RCNTHI
49
50 #define CR_RRD E8390_RREAD
51 #define CR_RWR E8390_RWRITE
52 #define CR_PG0 E8390_PAGE0
53 #define CR_STA E8390_START
54 #define CR_RDMA E8390_NODMA
55
56 /* FIXME! YOU MUST SET YOUR OWN ETHER ADDRESS. */
57 static byte stnic_eadr[6] =
58 {0x00, 0xc0, 0x6e, 0x00, 0x00, 0x07};
59
60 static struct net_device *stnic_dev;
61
62 static void stnic_reset (struct net_device *dev);
63 static void stnic_get_hdr (struct net_device *dev, struct e8390_pkt_hdr *hdr,
64 int ring_page);
65 static void stnic_block_input (struct net_device *dev, int count,
66 struct sk_buff *skb , int ring_offset);
67 static void stnic_block_output (struct net_device *dev, int count,
68 const unsigned char *buf, int start_page);
69
70 static void stnic_init (struct net_device *dev);
71
72 static u32 stnic_msg_enable;
73
74 module_param_named(msg_enable, stnic_msg_enable, uint, (S_IRUSR|S_IRGRP|S_IROTH));
75 MODULE_PARM_DESC(msg_enable, "Debug message level (see linux/netdevice.h for bitmap)");
76
77 /* SH7750 specific read/write io. */
78 static inline void
79 STNIC_DELAY (void)
80 {
81 vword trash;
82 trash = *(vword *) 0xa0000000;
83 trash = *(vword *) 0xa0000000;
84 trash = *(vword *) 0xa0000000;
85 }
86
87 static inline byte
88 STNIC_READ (int reg)
89 {
90 byte val;
91
92 val = (*(vhalf *) (PA_83902 + ((reg) << 1)) >> 8) & 0xff;
93 STNIC_DELAY ();
94 return val;
95 }
96
97 static inline void
98 STNIC_WRITE (int reg, byte val)
99 {
100 *(vhalf *) (PA_83902 + ((reg) << 1)) = ((half) (val) << 8);
101 STNIC_DELAY ();
102 }
103
104 static int __init stnic_probe(void)
105 {
106 struct net_device *dev;
107 int i, err;
108 struct ei_device *ei_local;
109
110 /* If we are not running on a SolutionEngine, give up now */
111 if (! MACH_SE)
112 return -ENODEV;
113
114 /* New style probing API */
115 dev = alloc_ei_netdev();
116 if (!dev)
117 return -ENOMEM;
118
119 #ifdef CONFIG_SH_STANDARD_BIOS
120 sh_bios_get_node_addr (stnic_eadr);
121 #endif
122 for (i = 0; i < ETH_ALEN; i++)
123 dev->dev_addr[i] = stnic_eadr[i];
124
125 /* Set the base address to point to the NIC, not the "real" base! */
126 dev->base_addr = 0x1000;
127 dev->irq = IRQ_STNIC;
128 dev->netdev_ops = &ei_netdev_ops;
129
130 /* Snarf the interrupt now. There's no point in waiting since we cannot
131 share and the board will usually be enabled. */
132 err = request_irq (dev->irq, ei_interrupt, 0, DRV_NAME, dev);
133 if (err) {
134 netdev_emerg(dev, " unable to get IRQ %d.\n", dev->irq);
135 free_netdev(dev);
136 return err;
137 }
138
139 ei_status.name = dev->name;
140 ei_status.word16 = 1;
141 #ifdef __LITTLE_ENDIAN__
142 ei_status.bigendian = 0;
143 #else
144 ei_status.bigendian = 1;
145 #endif
146 ei_status.tx_start_page = START_PG;
147 ei_status.rx_start_page = START_PG + TX_PAGES;
148 ei_status.stop_page = STOP_PG;
149
150 ei_status.reset_8390 = &stnic_reset;
151 ei_status.get_8390_hdr = &stnic_get_hdr;
152 ei_status.block_input = &stnic_block_input;
153 ei_status.block_output = &stnic_block_output;
154
155 stnic_init (dev);
156 ei_local = netdev_priv(dev);
157 ei_local->msg_enable = stnic_msg_enable;
158
159 err = register_netdev(dev);
160 if (err) {
161 free_irq(dev->irq, dev);
162 free_netdev(dev);
163 return err;
164 }
165 stnic_dev = dev;
166
167 netdev_info(dev, "NS ST-NIC 83902A\n");
168
169 return 0;
170 }
171
172 static void
173 stnic_reset (struct net_device *dev)
174 {
175 struct ei_device *ei_local = netdev_priv(dev);
176
177 *(vhalf *) PA_83902_RST = 0;
178 udelay (5);
179 netif_warn(ei_local, hw, dev, "8390 reset done (%ld).\n", jiffies);
180 *(vhalf *) PA_83902_RST = ~0;
181 udelay (5);
182 }
183
184 static void
185 stnic_get_hdr (struct net_device *dev, struct e8390_pkt_hdr *hdr,
186 int ring_page)
187 {
188 struct ei_device *ei_local = netdev_priv(dev);
189
190 half buf[2];
191
192 STNIC_WRITE (PG0_RSAR0, 0);
193 STNIC_WRITE (PG0_RSAR1, ring_page);
194 STNIC_WRITE (PG0_RBCR0, 4);
195 STNIC_WRITE (PG0_RBCR1, 0);
196 STNIC_WRITE (STNIC_CR, CR_RRD | CR_PG0 | CR_STA);
197
198 buf[0] = *(vhalf *) PA_83902_IF;
199 STNIC_DELAY ();
200 buf[1] = *(vhalf *) PA_83902_IF;
201 STNIC_DELAY ();
202 hdr->next = buf[0] >> 8;
203 hdr->status = buf[0] & 0xff;
204 #ifdef __LITTLE_ENDIAN__
205 hdr->count = buf[1];
206 #else
207 hdr->count = ((buf[1] >> 8) & 0xff) | (buf[1] << 8);
208 #endif
209
210 netif_dbg(ei_local, probe, dev, "ring %x status %02x next %02x count %04x.\n",
211 ring_page, hdr->status, hdr->next, hdr->count);
212
213 STNIC_WRITE (STNIC_CR, CR_RDMA | CR_PG0 | CR_STA);
214 }
215
216 /* Block input and output, similar to the Crynwr packet driver. If you are
217 porting to a new ethercard look at the packet driver source for hints.
218 The HP LAN doesn't use shared memory -- we put the packet
219 out through the "remote DMA" dataport. */
220
221 static void
222 stnic_block_input (struct net_device *dev, int length, struct sk_buff *skb,
223 int offset)
224 {
225 char *buf = skb->data;
226 half val;
227
228 STNIC_WRITE (PG0_RSAR0, offset & 0xff);
229 STNIC_WRITE (PG0_RSAR1, offset >> 8);
230 STNIC_WRITE (PG0_RBCR0, length & 0xff);
231 STNIC_WRITE (PG0_RBCR1, length >> 8);
232 STNIC_WRITE (STNIC_CR, CR_RRD | CR_PG0 | CR_STA);
233
234 if (length & 1)
235 length++;
236
237 while (length > 0)
238 {
239 val = *(vhalf *) PA_83902_IF;
240 #ifdef __LITTLE_ENDIAN__
241 *buf++ = val & 0xff;
242 *buf++ = val >> 8;
243 #else
244 *buf++ = val >> 8;
245 *buf++ = val & 0xff;
246 #endif
247 STNIC_DELAY ();
248 length -= sizeof (half);
249 }
250
251 STNIC_WRITE (STNIC_CR, CR_RDMA | CR_PG0 | CR_STA);
252 }
253
254 static void
255 stnic_block_output (struct net_device *dev, int length,
256 const unsigned char *buf, int output_page)
257 {
258 STNIC_WRITE (PG0_RBCR0, 1); /* Write non-zero value */
259 STNIC_WRITE (STNIC_CR, CR_RRD | CR_PG0 | CR_STA);
260 STNIC_DELAY ();
261
262 STNIC_WRITE (PG0_RBCR0, length & 0xff);
263 STNIC_WRITE (PG0_RBCR1, length >> 8);
264 STNIC_WRITE (PG0_RSAR0, 0);
265 STNIC_WRITE (PG0_RSAR1, output_page);
266 STNIC_WRITE (STNIC_CR, CR_RWR | CR_PG0 | CR_STA);
267
268 if (length & 1)
269 length++;
270
271 while (length > 0)
272 {
273 #ifdef __LITTLE_ENDIAN__
274 *(vhalf *) PA_83902_IF = ((half) buf[1] << 8) | buf[0];
275 #else
276 *(vhalf *) PA_83902_IF = ((half) buf[0] << 8) | buf[1];
277 #endif
278 STNIC_DELAY ();
279 buf += sizeof (half);
280 length -= sizeof (half);
281 }
282
283 STNIC_WRITE (STNIC_CR, CR_RDMA | CR_PG0 | CR_STA);
284 }
285
286 /* This function resets the STNIC if something screws up. */
287 static void
288 stnic_init (struct net_device *dev)
289 {
290 stnic_reset (dev);
291 NS8390_init (dev, 0);
292 }
293
294 static void __exit stnic_cleanup(void)
295 {
296 unregister_netdev(stnic_dev);
297 free_irq(stnic_dev->irq, stnic_dev);
298 free_netdev(stnic_dev);
299 }
300
301 module_init(stnic_probe);
302 module_exit(stnic_cleanup);
303 MODULE_LICENSE("GPL");