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[deliverable/linux.git] / drivers / net / zorro8390.c
1 /*
2 * Amiga Linux/m68k and Linux/PPC Zorro NS8390 Ethernet Driver
3 *
4 * (C) Copyright 1998-2000 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 and X-Surf are Zorro-II boards containing Realtek RTL8019AS
19 * Ethernet Controllers.
20 */
21
22 #include <linux/module.h>
23 #include <linux/kernel.h>
24 #include <linux/errno.h>
25 #include <linux/init.h>
26 #include <linux/delay.h>
27 #include <linux/netdevice.h>
28 #include <linux/etherdevice.h>
29 #include <linux/zorro.h>
30 #include <linux/jiffies.h>
31
32 #include <asm/system.h>
33 #include <asm/irq.h>
34 #include <asm/amigaints.h>
35 #include <asm/amigahw.h>
36
37 #define EI_SHIFT(x) (ei_local->reg_offset[x])
38 #define ei_inb(port) in_8(port)
39 #define ei_outb(val,port) out_8(port,val)
40 #define ei_inb_p(port) in_8(port)
41 #define ei_outb_p(val,port) out_8(port,val)
42
43 static const char version[] =
44 "8390.c:v1.10cvs 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
45
46 #include "lib8390.c"
47
48 #define DRV_NAME "zorro8390"
49
50 #define NE_BASE (dev->base_addr)
51 #define NE_CMD (0x00*2)
52 #define NE_DATAPORT (0x10*2) /* NatSemi-defined port window offset. */
53 #define NE_RESET (0x1f*2) /* Issue a read to reset, a write to clear. */
54 #define NE_IO_EXTENT (0x20*2)
55
56 #define NE_EN0_ISR (0x07*2)
57 #define NE_EN0_DCFG (0x0e*2)
58
59 #define NE_EN0_RSARLO (0x08*2)
60 #define NE_EN0_RSARHI (0x09*2)
61 #define NE_EN0_RCNTLO (0x0a*2)
62 #define NE_EN0_RXCR (0x0c*2)
63 #define NE_EN0_TXCR (0x0d*2)
64 #define NE_EN0_RCNTHI (0x0b*2)
65 #define NE_EN0_IMR (0x0f*2)
66
67 #define NESM_START_PG 0x40 /* First page of TX buffer */
68 #define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */
69
70
71 #define WORDSWAP(a) ((((a)>>8)&0xff) | ((a)<<8))
72
73
74 static struct card_info {
75 zorro_id id;
76 const char *name;
77 unsigned int offset;
78 } cards[] __devinitdata = {
79 { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE2, "Ariadne II", 0x0600 },
80 { ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, "X-Surf", 0x8600 },
81 };
82
83 static int __devinit zorro8390_init_one(struct zorro_dev *z,
84 const struct zorro_device_id *ent);
85 static int __devinit zorro8390_init(struct net_device *dev,
86 unsigned long board, const char *name,
87 unsigned long ioaddr);
88 static int zorro8390_open(struct net_device *dev);
89 static int zorro8390_close(struct net_device *dev);
90 static void zorro8390_reset_8390(struct net_device *dev);
91 static void zorro8390_get_8390_hdr(struct net_device *dev,
92 struct e8390_pkt_hdr *hdr, int ring_page);
93 static void zorro8390_block_input(struct net_device *dev, int count,
94 struct sk_buff *skb, int ring_offset);
95 static void zorro8390_block_output(struct net_device *dev, const int count,
96 const unsigned char *buf,
97 const int start_page);
98 static void __devexit zorro8390_remove_one(struct zorro_dev *z);
99
100 static struct zorro_device_id zorro8390_zorro_tbl[] __devinitdata = {
101 { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE2, },
102 { ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, },
103 { 0 }
104 };
105
106 static struct zorro_driver zorro8390_driver = {
107 .name = "zorro8390",
108 .id_table = zorro8390_zorro_tbl,
109 .probe = zorro8390_init_one,
110 .remove = __devexit_p(zorro8390_remove_one),
111 };
112
113 static int __devinit zorro8390_init_one(struct zorro_dev *z,
114 const struct zorro_device_id *ent)
115 {
116 struct net_device *dev;
117 unsigned long board, ioaddr;
118 int err, i;
119
120 for (i = ARRAY_SIZE(cards)-1; i >= 0; i--)
121 if (z->id == cards[i].id)
122 break;
123 board = z->resource.start;
124 ioaddr = board+cards[i].offset;
125 dev = ____alloc_ei_netdev(0);
126 if (!dev)
127 return -ENOMEM;
128 if (!request_mem_region(ioaddr, NE_IO_EXTENT*2, DRV_NAME)) {
129 free_netdev(dev);
130 return -EBUSY;
131 }
132 if ((err = zorro8390_init(dev, board, cards[i].name,
133 ZTWO_VADDR(ioaddr)))) {
134 release_mem_region(ioaddr, NE_IO_EXTENT*2);
135 free_netdev(dev);
136 return err;
137 }
138 zorro_set_drvdata(z, dev);
139 return 0;
140 }
141
142 static int __devinit zorro8390_init(struct net_device *dev,
143 unsigned long board, const char *name,
144 unsigned long ioaddr)
145 {
146 int i;
147 int err;
148 unsigned char SA_prom[32];
149 int start_page, stop_page;
150 static u32 zorro8390_offsets[16] = {
151 0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e,
152 0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e,
153 };
154
155 /* Reset card. Who knows what dain-bramaged state it was left in. */
156 {
157 unsigned long reset_start_time = jiffies;
158
159 z_writeb(z_readb(ioaddr + NE_RESET), ioaddr + NE_RESET);
160
161 while ((z_readb(ioaddr + NE_EN0_ISR) & ENISR_RESET) == 0)
162 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
163 printk(KERN_WARNING " not found (no reset ack).\n");
164 return -ENODEV;
165 }
166
167 z_writeb(0xff, ioaddr + NE_EN0_ISR); /* Ack all intr. */
168 }
169
170 /* Read the 16 bytes of station address PROM.
171 We must first initialize registers, similar to NS8390_init(eifdev, 0).
172 We can't reliably read the SAPROM address without this.
173 (I learned the hard way!). */
174 {
175 struct {
176 u32 value;
177 u32 offset;
178 } program_seq[] = {
179 {E8390_NODMA+E8390_PAGE0+E8390_STOP, NE_CMD}, /* Select page 0*/
180 {0x48, NE_EN0_DCFG}, /* Set byte-wide (0x48) access. */
181 {0x00, NE_EN0_RCNTLO}, /* Clear the count regs. */
182 {0x00, NE_EN0_RCNTHI},
183 {0x00, NE_EN0_IMR}, /* Mask completion irq. */
184 {0xFF, NE_EN0_ISR},
185 {E8390_RXOFF, NE_EN0_RXCR}, /* 0x20 Set to monitor */
186 {E8390_TXOFF, NE_EN0_TXCR}, /* 0x02 and loopback mode. */
187 {32, NE_EN0_RCNTLO},
188 {0x00, NE_EN0_RCNTHI},
189 {0x00, NE_EN0_RSARLO}, /* DMA starting at 0x0000. */
190 {0x00, NE_EN0_RSARHI},
191 {E8390_RREAD+E8390_START, NE_CMD},
192 };
193 for (i = 0; i < ARRAY_SIZE(program_seq); i++) {
194 z_writeb(program_seq[i].value, ioaddr + program_seq[i].offset);
195 }
196 }
197 for (i = 0; i < 16; i++) {
198 SA_prom[i] = z_readb(ioaddr + NE_DATAPORT);
199 (void)z_readb(ioaddr + NE_DATAPORT);
200 }
201
202 /* We must set the 8390 for word mode. */
203 z_writeb(0x49, ioaddr + NE_EN0_DCFG);
204 start_page = NESM_START_PG;
205 stop_page = NESM_STOP_PG;
206
207 dev->base_addr = ioaddr;
208 dev->irq = IRQ_AMIGA_PORTS;
209
210 /* Install the Interrupt handler */
211 i = request_irq(IRQ_AMIGA_PORTS, __ei_interrupt, IRQF_SHARED, DRV_NAME, dev);
212 if (i) return i;
213
214 for(i = 0; i < ETHER_ADDR_LEN; i++)
215 dev->dev_addr[i] = SA_prom[i];
216
217 #ifdef DEBUG
218 printk("%pM", dev->dev_addr);
219 #endif
220
221 ei_status.name = name;
222 ei_status.tx_start_page = start_page;
223 ei_status.stop_page = stop_page;
224 ei_status.word16 = 1;
225
226 ei_status.rx_start_page = start_page + TX_PAGES;
227
228 ei_status.reset_8390 = &zorro8390_reset_8390;
229 ei_status.block_input = &zorro8390_block_input;
230 ei_status.block_output = &zorro8390_block_output;
231 ei_status.get_8390_hdr = &zorro8390_get_8390_hdr;
232 ei_status.reg_offset = zorro8390_offsets;
233 dev->open = &zorro8390_open;
234 dev->stop = &zorro8390_close;
235 #ifdef CONFIG_NET_POLL_CONTROLLER
236 dev->poll_controller = __ei_poll;
237 #endif
238
239 __NS8390_init(dev, 0);
240 err = register_netdev(dev);
241 if (err) {
242 free_irq(IRQ_AMIGA_PORTS, dev);
243 return err;
244 }
245
246 printk(KERN_INFO "%s: %s at 0x%08lx, Ethernet Address %pM\n",
247 dev->name, name, board, dev->dev_addr);
248
249 return 0;
250 }
251
252 static int zorro8390_open(struct net_device *dev)
253 {
254 __ei_open(dev);
255 return 0;
256 }
257
258 static int zorro8390_close(struct net_device *dev)
259 {
260 if (ei_debug > 1)
261 printk(KERN_DEBUG "%s: Shutting down ethercard.\n", dev->name);
262 __ei_close(dev);
263 return 0;
264 }
265
266 /* Hard reset the card. This used to pause for the same period that a
267 8390 reset command required, but that shouldn't be necessary. */
268 static void zorro8390_reset_8390(struct net_device *dev)
269 {
270 unsigned long reset_start_time = jiffies;
271
272 if (ei_debug > 1)
273 printk(KERN_DEBUG "resetting the 8390 t=%ld...\n", jiffies);
274
275 z_writeb(z_readb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
276
277 ei_status.txing = 0;
278 ei_status.dmaing = 0;
279
280 /* This check _should_not_ be necessary, omit eventually. */
281 while ((z_readb(NE_BASE+NE_EN0_ISR) & ENISR_RESET) == 0)
282 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
283 printk(KERN_WARNING "%s: ne_reset_8390() did not complete.\n",
284 dev->name);
285 break;
286 }
287 z_writeb(ENISR_RESET, NE_BASE + NE_EN0_ISR); /* Ack intr. */
288 }
289
290 /* Grab the 8390 specific header. Similar to the block_input routine, but
291 we don't need to be concerned with ring wrap as the header will be at
292 the start of a page, so we optimize accordingly. */
293
294 static void zorro8390_get_8390_hdr(struct net_device *dev,
295 struct e8390_pkt_hdr *hdr, int ring_page)
296 {
297 int nic_base = dev->base_addr;
298 int cnt;
299 short *ptrs;
300
301 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
302 if (ei_status.dmaing) {
303 printk(KERN_ERR "%s: DMAing conflict in ne_get_8390_hdr "
304 "[DMAstat:%d][irqlock:%d].\n", dev->name, ei_status.dmaing,
305 ei_status.irqlock);
306 return;
307 }
308
309 ei_status.dmaing |= 0x01;
310 z_writeb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
311 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
312 z_writeb(sizeof(struct e8390_pkt_hdr), nic_base + NE_EN0_RCNTLO);
313 z_writeb(0, nic_base + NE_EN0_RCNTHI);
314 z_writeb(0, nic_base + NE_EN0_RSARLO); /* On page boundary */
315 z_writeb(ring_page, nic_base + NE_EN0_RSARHI);
316 z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
317
318 ptrs = (short*)hdr;
319 for (cnt = 0; cnt < (sizeof(struct e8390_pkt_hdr)>>1); cnt++)
320 *ptrs++ = z_readw(NE_BASE + NE_DATAPORT);
321
322 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
323
324 hdr->count = WORDSWAP(hdr->count);
325
326 ei_status.dmaing &= ~0x01;
327 }
328
329 /* Block input and output, similar to the Crynwr packet driver. If you
330 are porting to a new ethercard, look at the packet driver source for hints.
331 The NEx000 doesn't share the on-board packet memory -- you have to put
332 the packet out through the "remote DMA" dataport using z_writeb. */
333
334 static void zorro8390_block_input(struct net_device *dev, int count,
335 struct sk_buff *skb, int ring_offset)
336 {
337 int nic_base = dev->base_addr;
338 char *buf = skb->data;
339 short *ptrs;
340 int cnt;
341
342 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
343 if (ei_status.dmaing) {
344 printk(KERN_ERR "%s: DMAing conflict in ne_block_input "
345 "[DMAstat:%d][irqlock:%d].\n",
346 dev->name, ei_status.dmaing, ei_status.irqlock);
347 return;
348 }
349 ei_status.dmaing |= 0x01;
350 z_writeb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
351 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
352 z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
353 z_writeb(count >> 8, nic_base + NE_EN0_RCNTHI);
354 z_writeb(ring_offset & 0xff, nic_base + NE_EN0_RSARLO);
355 z_writeb(ring_offset >> 8, nic_base + NE_EN0_RSARHI);
356 z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
357 ptrs = (short*)buf;
358 for (cnt = 0; cnt < (count>>1); cnt++)
359 *ptrs++ = z_readw(NE_BASE + NE_DATAPORT);
360 if (count & 0x01)
361 buf[count-1] = z_readb(NE_BASE + NE_DATAPORT);
362
363 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
364 ei_status.dmaing &= ~0x01;
365 }
366
367 static void zorro8390_block_output(struct net_device *dev, int count,
368 const unsigned char *buf,
369 const int start_page)
370 {
371 int nic_base = NE_BASE;
372 unsigned long dma_start;
373 short *ptrs;
374 int cnt;
375
376 /* Round the count up for word writes. Do we need to do this?
377 What effect will an odd byte count have on the 8390?
378 I should check someday. */
379 if (count & 0x01)
380 count++;
381
382 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
383 if (ei_status.dmaing) {
384 printk(KERN_ERR "%s: DMAing conflict in ne_block_output."
385 "[DMAstat:%d][irqlock:%d]\n", dev->name, ei_status.dmaing,
386 ei_status.irqlock);
387 return;
388 }
389 ei_status.dmaing |= 0x01;
390 /* We should already be in page 0, but to be safe... */
391 z_writeb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
392
393 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
394
395 /* Now the normal output. */
396 z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
397 z_writeb(count >> 8, nic_base + NE_EN0_RCNTHI);
398 z_writeb(0x00, nic_base + NE_EN0_RSARLO);
399 z_writeb(start_page, nic_base + NE_EN0_RSARHI);
400
401 z_writeb(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
402 ptrs = (short*)buf;
403 for (cnt = 0; cnt < count>>1; cnt++)
404 z_writew(*ptrs++, NE_BASE+NE_DATAPORT);
405
406 dma_start = jiffies;
407
408 while ((z_readb(NE_BASE + NE_EN0_ISR) & ENISR_RDC) == 0)
409 if (time_after(jiffies, dma_start + 2*HZ/100)) { /* 20ms */
410 printk(KERN_ERR "%s: timeout waiting for Tx RDC.\n",
411 dev->name);
412 zorro8390_reset_8390(dev);
413 __NS8390_init(dev,1);
414 break;
415 }
416
417 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
418 ei_status.dmaing &= ~0x01;
419 return;
420 }
421
422 static void __devexit zorro8390_remove_one(struct zorro_dev *z)
423 {
424 struct net_device *dev = zorro_get_drvdata(z);
425
426 unregister_netdev(dev);
427 free_irq(IRQ_AMIGA_PORTS, dev);
428 release_mem_region(ZTWO_PADDR(dev->base_addr), NE_IO_EXTENT*2);
429 free_netdev(dev);
430 }
431
432 static int __init zorro8390_init_module(void)
433 {
434 return zorro_register_driver(&zorro8390_driver);
435 }
436
437 static void __exit zorro8390_cleanup_module(void)
438 {
439 zorro_unregister_driver(&zorro8390_driver);
440 }
441
442 module_init(zorro8390_init_module);
443 module_exit(zorro8390_cleanup_module);
444
445 MODULE_LICENSE("GPL");
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