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* add p cc
[mascara-docs.git] / i386 / linux / linux-2.3.21 / drivers / net / ariadne2.c
blob10edf1e79cdf2dcd8832ae0691f9a401c3373b0c
1 /*
2 * Amiga Linux/m68k Ariadne II Ethernet Driver
3 *
4 * (C) Copyright 1998 by some Elitist 680x0 Users(TM)
5 *
6 * ---------------------------------------------------------------------------
7 *
8 * This program is based on all the other NE2000 drivers for Linux
9 *
10 * ---------------------------------------------------------------------------
11 *
12 * This file is subject to the terms and conditions of the GNU General Public
13 * License. See the file COPYING in the main directory of the Linux
14 * distribution for more details.
15 *
16 * ---------------------------------------------------------------------------
17 *
18 * The Ariadne II is a Zorro-II board made by Village Tronic. It contains a
19 * Realtek RTL8019AS Ethernet Controller.
20 */
21
22 #include <linux/module.h>
23 #include <linux/kernel.h>
24 #include <linux/sched.h>
25 #include <linux/errno.h>
26 #include <linux/init.h>
27 #include <linux/delay.h>
28 #include <linux/netdevice.h>
29 #include <linux/etherdevice.h>
30 #include <linux/zorro.h>
31
32 #include <asm/system.h>
33 #include <asm/io.h>
34 #include <asm/irq.h>
35 #include <asm/amigaints.h>
36 #include <asm/amigahw.h>
37
38 #include "8390.h"
39
40
41 #define ARIADNE2_BASE 0x0300
42 #define ARIADNE2_BOOTROM 0xc000
43
44
45 #define NE_BASE (dev->base_addr)
46 #define NE_CMD (0x00*2)
47 #define NE_DATAPORT (0x10*2) /* NatSemi-defined port window offset. */
48 #define NE_RESET (0x1f*2) /* Issue a read to reset, a write to clear. */
49 #define NE_IO_EXTENT (0x20*2)
50
51 #define NE_EN0_ISR (0x07*2)
52 #define NE_EN0_DCFG (0x0e*2)
53
54 #define NE_EN0_RSARLO (0x08*2)
55 #define NE_EN0_RSARHI (0x09*2)
56 #define NE_EN0_RCNTLO (0x0a*2)
57 #define NE_EN0_RXCR (0x0c*2)
58 #define NE_EN0_TXCR (0x0d*2)
59 #define NE_EN0_RCNTHI (0x0b*2)
60 #define NE_EN0_IMR (0x0f*2)
61
62 #define NESM_START_PG 0x40 /* First page of TX buffer */
63 #define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */
64
65
66 #define WORDSWAP(a) ((((a)>>8)&0xff) | ((a)<<8))
67
68 int ariadne2_probe(struct net_device *dev);
69 static int ariadne2_init(struct net_device *dev, unsigned int key,
70 unsigned long board);
71
72 static int ariadne2_open(struct net_device *dev);
73 static int ariadne2_close(struct net_device *dev);
74
75 static void ariadne2_reset_8390(struct net_device *dev);
76 static void ariadne2_get_8390_hdr(struct net_device *dev,
77 struct e8390_pkt_hdr *hdr, int ring_page);
78 static void ariadne2_block_input(struct net_device *dev, int count,
79 struct sk_buff *skb, int ring_offset);
80 static void ariadne2_block_output(struct net_device *dev, const int count,
81 const unsigned char *buf,
82 const int start_page);
83
84 int __init ariadne2_probe(struct net_device *dev)
85 {
86 unsigned int key;
87 const struct ConfigDev *cd;
88 u_long board;
89 int err;
90
91 if ((key = zorro_find(ZORRO_PROD_VILLAGE_TRONIC_ARIADNE2, 0, 0))) {
92 cd = zorro_get_board(key);
93 if ((board = (u_long)cd->cd_BoardAddr)) {
94 if ((err = ariadne2_init(dev, key, ZTWO_VADDR(board))))
95 return err;
96 zorro_config_board(key, 0);
97 return 0;
98 }
99 }
100 return -ENODEV;
101 }
102
103 static int __init ariadne2_init(struct net_device *dev, unsigned int key,
104 unsigned long board)
105 {
106 int i;
107 unsigned char SA_prom[32];
108 const char *name = NULL;
109 int start_page, stop_page;
110 static u32 ariadne2_offsets[16] = {
111 0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e,
112 0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e,
113 };
114 int ioaddr = board+ARIADNE2_BASE*2;
115
116 if (load_8390_module("ariadne2.c"))
117 return -ENOSYS;
118
119 /* We should have a "dev" from Space.c or the static module table. */
120 if (dev == NULL) {
121 printk(KERN_ERR "ariadne2.c: Passed a NULL device.\n");
122 dev = init_etherdev(0, 0);
123 }
124
125 /* Reset card. Who knows what dain-bramaged state it was left in. */
126 {
127 unsigned long reset_start_time = jiffies;
128
129 writeb(readb(ioaddr + NE_RESET), ioaddr + NE_RESET);
130
131 while ((readb(ioaddr + NE_EN0_ISR) & ENISR_RESET) == 0)
132 if (jiffies - reset_start_time > 2*HZ/100) {
133 printk(" not found (no reset ack).\n");
134 return -ENODEV;
135 }
136
137 writeb(0xff, ioaddr + NE_EN0_ISR); /* Ack all intr. */
138 }
139
140 /* Read the 16 bytes of station address PROM.
141 We must first initialize registers, similar to NS8390_init(eifdev, 0).
142 We can't reliably read the SAPROM address without this.
143 (I learned the hard way!). */
144 {
145 struct {
146 u32 value;
147 u32 offset;
148 } program_seq[] = {
149 {E8390_NODMA+E8390_PAGE0+E8390_STOP, NE_CMD}, /* Select page 0*/
150 {0x48, NE_EN0_DCFG}, /* Set byte-wide (0x48) access. */
151 {0x00, NE_EN0_RCNTLO}, /* Clear the count regs. */
152 {0x00, NE_EN0_RCNTHI},
153 {0x00, NE_EN0_IMR}, /* Mask completion irq. */
154 {0xFF, NE_EN0_ISR},
155 {E8390_RXOFF, NE_EN0_RXCR}, /* 0x20 Set to monitor */
156 {E8390_TXOFF, NE_EN0_TXCR}, /* 0x02 and loopback mode. */
157 {32, NE_EN0_RCNTLO},
158 {0x00, NE_EN0_RCNTHI},
159 {0x00, NE_EN0_RSARLO}, /* DMA starting at 0x0000. */
160 {0x00, NE_EN0_RSARHI},
161 {E8390_RREAD+E8390_START, NE_CMD},
162 };
163 for (i = 0; i < sizeof(program_seq)/sizeof(program_seq[0]); i++) {
164 writeb(program_seq[i].value, ioaddr + program_seq[i].offset);
165 }
166 }
167 for (i = 0; i < 16; i++) {
168 SA_prom[i] = readb(ioaddr + NE_DATAPORT);
169 (void)readb(ioaddr + NE_DATAPORT);
170 }
171
172 /* We must set the 8390 for word mode. */
173 writeb(0x49, ioaddr + NE_EN0_DCFG);
174 start_page = NESM_START_PG;
175 stop_page = NESM_STOP_PG;
176
177 name = "NE2000";
178
179 dev->base_addr = ioaddr;
180 dev->irq = IRQ_AMIGA_PORTS;
181
182 /* Install the Interrupt handler */
183 if (request_irq(IRQ_AMIGA_PORTS, ei_interrupt, SA_SHIRQ,
184 "AriadNE2 Ethernet", dev))
185 return -EAGAIN;
186
187 /* Allocate dev->priv and fill in 8390 specific dev fields. */
188 if (ethdev_init(dev)) {
189 printk("Unable to get memory for dev->priv.\n");
190 return -ENOMEM;
191 }
192 ((struct ei_device *)dev->priv)->priv = key;
193
194 for(i = 0; i < ETHER_ADDR_LEN; i++) {
195 #ifdef DEBUG
196 printk(" %2.2x", SA_prom[i]);
197 #endif
198 dev->dev_addr[i] = SA_prom[i];
199 }
200
201 printk("%s: AriadNE2 at 0x%08lx, Ethernet Address "
202 "%02x:%02x:%02x:%02x:%02x:%02x\n", dev->name, board,
203 dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
204 dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
205
206 ei_status.name = name;
207 ei_status.tx_start_page = start_page;
208 ei_status.stop_page = stop_page;
209 ei_status.word16 = 1;
210
211 ei_status.rx_start_page = start_page + TX_PAGES;
212
213 ei_status.reset_8390 = &ariadne2_reset_8390;
214 ei_status.block_input = &ariadne2_block_input;
215 ei_status.block_output = &ariadne2_block_output;
216 ei_status.get_8390_hdr = &ariadne2_get_8390_hdr;
217 ei_status.reg_offset = ariadne2_offsets;
218 dev->open = &ariadne2_open;
219 dev->stop = &ariadne2_close;
220 NS8390_init(dev, 0);
221 return 0;
222 }
223
224 static int ariadne2_open(struct net_device *dev)
225 {
226 ei_open(dev);
227 MOD_INC_USE_COUNT;
228 return 0;
229 }
230
231 static int ariadne2_close(struct net_device *dev)
232 {
233 if (ei_debug > 1)
234 printk("%s: Shutting down ethercard.\n", dev->name);
235 ei_close(dev);
236 MOD_DEC_USE_COUNT;
237 return 0;
238 }
239
240 /* Hard reset the card. This used to pause for the same period that a
241 8390 reset command required, but that shouldn't be necessary. */
242 static void ariadne2_reset_8390(struct net_device *dev)
243 {
244 unsigned long reset_start_time = jiffies;
245
246 if (ei_debug > 1)
247 printk("resetting the 8390 t=%ld...", jiffies);
248
249 writeb(readb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
250
251 ei_status.txing = 0;
252 ei_status.dmaing = 0;
253
254 /* This check _should_not_ be necessary, omit eventually. */
255 while ((readb(NE_BASE+NE_EN0_ISR) & ENISR_RESET) == 0)
256 if (jiffies - reset_start_time > 2*HZ/100) {
257 printk("%s: ne_reset_8390() did not complete.\n", dev->name);
258 break;
259 }
260 writeb(ENISR_RESET, NE_BASE + NE_EN0_ISR); /* Ack intr. */
261 }
262
263 /* Grab the 8390 specific header. Similar to the block_input routine, but
264 we don't need to be concerned with ring wrap as the header will be at
265 the start of a page, so we optimize accordingly. */
266
267 static void ariadne2_get_8390_hdr(struct net_device *dev,
268 struct e8390_pkt_hdr *hdr, int ring_page)
269 {
270 int nic_base = dev->base_addr;
271 int cnt;
272 short *ptrs;
273
274 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
275 if (ei_status.dmaing) {
276 printk("%s: DMAing conflict in ne_get_8390_hdr "
277 "[DMAstat:%d][irqlock:%d][intr:%ld].\n", dev->name, ei_status.dmaing,
278 ei_status.irqlock, dev->interrupt);
279 return;
280 }
281
282 ei_status.dmaing |= 0x01;
283 writeb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
284 writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
285 writeb(sizeof(struct e8390_pkt_hdr), nic_base + NE_EN0_RCNTLO);
286 writeb(0, nic_base + NE_EN0_RCNTHI);
287 writeb(0, nic_base + NE_EN0_RSARLO); /* On page boundary */
288 writeb(ring_page, nic_base + NE_EN0_RSARHI);
289 writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
290
291 ptrs = (short*)hdr;
292 for (cnt = 0; cnt < (sizeof(struct e8390_pkt_hdr)>>1); cnt++)
293 *ptrs++ = readw(NE_BASE + NE_DATAPORT);
294
295 writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
296
297 hdr->count = WORDSWAP(hdr->count);
298
299 ei_status.dmaing &= ~0x01;
300 }
301
302 /* Block input and output, similar to the Crynwr packet driver. If you
303 are porting to a new ethercard, look at the packet driver source for hints.
304 The NEx000 doesn't share the on-board packet memory -- you have to put
305 the packet out through the "remote DMA" dataport using writeb. */
306
307 static void ariadne2_block_input(struct net_device *dev, int count,
308 struct sk_buff *skb, int ring_offset)
309 {
310 int nic_base = dev->base_addr;
311 char *buf = skb->data;
312 short *ptrs;
313 int cnt;
314
315 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
316 if (ei_status.dmaing) {
317 printk("%s: DMAing conflict in ne_block_input "
318 "[DMAstat:%d][irqlock:%d][intr:%ld].\n",
319 dev->name, ei_status.dmaing, ei_status.irqlock,
320 dev->interrupt);
321 return;
322 }
323 ei_status.dmaing |= 0x01;
324 writeb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
325 writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
326 writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
327 writeb(count >> 8, nic_base + NE_EN0_RCNTHI);
328 writeb(ring_offset & 0xff, nic_base + NE_EN0_RSARLO);
329 writeb(ring_offset >> 8, nic_base + NE_EN0_RSARHI);
330 writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
331 ptrs = (short*)buf;
332 for (cnt = 0; cnt < (count>>1); cnt++)
333 *ptrs++ = readw(NE_BASE + NE_DATAPORT);
334 if (count & 0x01)
335 buf[count-1] = readb(NE_BASE + NE_DATAPORT);
336
337 writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
338 ei_status.dmaing &= ~0x01;
339 }
340
341 static void ariadne2_block_output(struct net_device *dev, int count,
342 const unsigned char *buf,
343 const int start_page)
344 {
345 int nic_base = NE_BASE;
346 unsigned long dma_start;
347 short *ptrs;
348 int cnt;
349
350 /* Round the count up for word writes. Do we need to do this?
351 What effect will an odd byte count have on the 8390?
352 I should check someday. */
353 if (count & 0x01)
354 count++;
355
356 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
357 if (ei_status.dmaing) {
358 printk("%s: DMAing conflict in ne_block_output."
359 "[DMAstat:%d][irqlock:%d][intr:%ld]\n", dev->name, ei_status.dmaing,
360 ei_status.irqlock, dev->interrupt);
361 return;
362 }
363 ei_status.dmaing |= 0x01;
364 /* We should already be in page 0, but to be safe... */
365 writeb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
366
367 writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
368
369 /* Now the normal output. */
370 writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
371 writeb(count >> 8, nic_base + NE_EN0_RCNTHI);
372 writeb(0x00, nic_base + NE_EN0_RSARLO);
373 writeb(start_page, nic_base + NE_EN0_RSARHI);
374
375 writeb(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
376 ptrs = (short*)buf;
377 for (cnt = 0; cnt < count>>1; cnt++)
378 writew(*ptrs++, NE_BASE+NE_DATAPORT);
379
380 dma_start = jiffies;
381
382 while ((readb(NE_BASE + NE_EN0_ISR) & ENISR_RDC) == 0)
383 if (jiffies - dma_start > 2*HZ/100) { /* 20ms */
384 printk("%s: timeout waiting for Tx RDC.\n", dev->name);
385 ariadne2_reset_8390(dev);
386 NS8390_init(dev,1);
387 break;
388 }
389
390 writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
391 ei_status.dmaing &= ~0x01;
392 return;
393 }
394
395 #ifdef MODULE
396 static char devicename[9] = { 0, };
397
398 static struct net_device ariadne2_dev =
399 {
400 devicename,
401 0, 0, 0, 0,
402 0, 0,
403 0, 0, 0, NULL, ariadne2_probe,
404 };
405
406 int init_module(void)
407 {
408 int err;
409 if ((err = register_netdev(&ariadne2_dev))) {
410 if (err == -EIO)
411 printk("No AriadNE2 ethernet card found.\n");
412 return err;
413 }
414 lock_8390_module();
415 return 0;
416 }
417
418 void cleanup_module(void)
419 {
420 unsigned int key = ((struct ei_device *)ariadne2_dev.priv)->priv;
421 free_irq(IRQ_AMIGA_PORTS, &ariadne2_dev);
422 unregister_netdev(&ariadne2_dev);
423 zorro_unconfig_board(key, 0);
424 unlock_8390_module();
425 }
426
427 #endif /* MODULE */