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[TG3]: Set minimal hw interrupt mitigation.
[linux-2.6/verdex.git] / drivers / net / zorro8390.c
blob8ab6e12153baf40d9c2e82aaeec068c06ce7215e
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
31 #include <asm/system.h>
32 #include <asm/irq.h>
33 #include <asm/amigaints.h>
34 #include <asm/amigahw.h>
35
36 #include "8390.h"
37
38
39 #define DRV_NAME "zorro8390"
40
41 #define NE_BASE (dev->base_addr)
42 #define NE_CMD (0x00*2)
43 #define NE_DATAPORT (0x10*2) /* NatSemi-defined port window offset. */
44 #define NE_RESET (0x1f*2) /* Issue a read to reset, a write to clear. */
45 #define NE_IO_EXTENT (0x20*2)
46
47 #define NE_EN0_ISR (0x07*2)
48 #define NE_EN0_DCFG (0x0e*2)
49
50 #define NE_EN0_RSARLO (0x08*2)
51 #define NE_EN0_RSARHI (0x09*2)
52 #define NE_EN0_RCNTLO (0x0a*2)
53 #define NE_EN0_RXCR (0x0c*2)
54 #define NE_EN0_TXCR (0x0d*2)
55 #define NE_EN0_RCNTHI (0x0b*2)
56 #define NE_EN0_IMR (0x0f*2)
57
58 #define NESM_START_PG 0x40 /* First page of TX buffer */
59 #define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */
60
61
62 #define WORDSWAP(a) ((((a)>>8)&0xff) | ((a)<<8))
63
64
65 static struct card_info {
66 zorro_id id;
67 const char *name;
68 unsigned int offset;
69 } cards[] __devinitdata = {
70 { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE2, "Ariadne II", 0x0600 },
71 { ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, "X-Surf", 0x8600 },
72 };
73
74 static int __devinit zorro8390_init_one(struct zorro_dev *z,
75 const struct zorro_device_id *ent);
76 static int __devinit zorro8390_init(struct net_device *dev,
77 unsigned long board, const char *name,
78 unsigned long ioaddr);
79 static int zorro8390_open(struct net_device *dev);
80 static int zorro8390_close(struct net_device *dev);
81 static void zorro8390_reset_8390(struct net_device *dev);
82 static void zorro8390_get_8390_hdr(struct net_device *dev,
83 struct e8390_pkt_hdr *hdr, int ring_page);
84 static void zorro8390_block_input(struct net_device *dev, int count,
85 struct sk_buff *skb, int ring_offset);
86 static void zorro8390_block_output(struct net_device *dev, const int count,
87 const unsigned char *buf,
88 const int start_page);
89 static void __devexit zorro8390_remove_one(struct zorro_dev *z);
90
91 static struct zorro_device_id zorro8390_zorro_tbl[] __devinitdata = {
92 { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE2, },
93 { ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, },
94 { 0 }
95 };
96
97 static struct zorro_driver zorro8390_driver = {
98 .name = "zorro8390",
99 .id_table = zorro8390_zorro_tbl,
100 .probe = zorro8390_init_one,
101 .remove = __devexit_p(zorro8390_remove_one),
102 };
103
104 static int __devinit zorro8390_init_one(struct zorro_dev *z,
105 const struct zorro_device_id *ent)
106 {
107 struct net_device *dev;
108 unsigned long board, ioaddr;
109 int err, i;
110
111 for (i = ARRAY_SIZE(cards)-1; i >= 0; i--)
112 if (z->id == cards[i].id)
113 break;
114 board = z->resource.start;
115 ioaddr = board+cards[i].offset;
116 dev = alloc_ei_netdev();
117 if (!dev)
118 return -ENOMEM;
119 SET_MODULE_OWNER(dev);
120 if (!request_mem_region(ioaddr, NE_IO_EXTENT*2, DRV_NAME)) {
121 free_netdev(dev);
122 return -EBUSY;
123 }
124 if ((err = zorro8390_init(dev, board, cards[i].name,
125 ZTWO_VADDR(ioaddr)))) {
126 release_mem_region(ioaddr, NE_IO_EXTENT*2);
127 free_netdev(dev);
128 return err;
129 }
130 zorro_set_drvdata(z, dev);
131 return 0;
132 }
133
134 static int __devinit zorro8390_init(struct net_device *dev,
135 unsigned long board, const char *name,
136 unsigned long ioaddr)
137 {
138 int i;
139 int err;
140 unsigned char SA_prom[32];
141 int start_page, stop_page;
142 static u32 zorro8390_offsets[16] = {
143 0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e,
144 0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e,
145 };
146
147 /* Reset card. Who knows what dain-bramaged state it was left in. */
148 {
149 unsigned long reset_start_time = jiffies;
150
151 z_writeb(z_readb(ioaddr + NE_RESET), ioaddr + NE_RESET);
152
153 while ((z_readb(ioaddr + NE_EN0_ISR) & ENISR_RESET) == 0)
154 if (jiffies - reset_start_time > 2*HZ/100) {
155 printk(KERN_WARNING " not found (no reset ack).\n");
156 return -ENODEV;
157 }
158
159 z_writeb(0xff, ioaddr + NE_EN0_ISR); /* Ack all intr. */
160 }
161
162 /* Read the 16 bytes of station address PROM.
163 We must first initialize registers, similar to NS8390_init(eifdev, 0).
164 We can't reliably read the SAPROM address without this.
165 (I learned the hard way!). */
166 {
167 struct {
168 u32 value;
169 u32 offset;
170 } program_seq[] = {
171 {E8390_NODMA+E8390_PAGE0+E8390_STOP, NE_CMD}, /* Select page 0*/
172 {0x48, NE_EN0_DCFG}, /* Set byte-wide (0x48) access. */
173 {0x00, NE_EN0_RCNTLO}, /* Clear the count regs. */
174 {0x00, NE_EN0_RCNTHI},
175 {0x00, NE_EN0_IMR}, /* Mask completion irq. */
176 {0xFF, NE_EN0_ISR},
177 {E8390_RXOFF, NE_EN0_RXCR}, /* 0x20 Set to monitor */
178 {E8390_TXOFF, NE_EN0_TXCR}, /* 0x02 and loopback mode. */
179 {32, NE_EN0_RCNTLO},
180 {0x00, NE_EN0_RCNTHI},
181 {0x00, NE_EN0_RSARLO}, /* DMA starting at 0x0000. */
182 {0x00, NE_EN0_RSARHI},
183 {E8390_RREAD+E8390_START, NE_CMD},
184 };
185 for (i = 0; i < sizeof(program_seq)/sizeof(program_seq[0]); i++) {
186 z_writeb(program_seq[i].value, ioaddr + program_seq[i].offset);
187 }
188 }
189 for (i = 0; i < 16; i++) {
190 SA_prom[i] = z_readb(ioaddr + NE_DATAPORT);
191 (void)z_readb(ioaddr + NE_DATAPORT);
192 }
193
194 /* We must set the 8390 for word mode. */
195 z_writeb(0x49, ioaddr + NE_EN0_DCFG);
196 start_page = NESM_START_PG;
197 stop_page = NESM_STOP_PG;
198
199 dev->base_addr = ioaddr;
200 dev->irq = IRQ_AMIGA_PORTS;
201
202 /* Install the Interrupt handler */
203 i = request_irq(IRQ_AMIGA_PORTS, ei_interrupt, SA_SHIRQ, DRV_NAME, dev);
204 if (i) return i;
205
206 for(i = 0; i < ETHER_ADDR_LEN; i++) {
207 #ifdef DEBUG
208 printk(" %2.2x", SA_prom[i]);
209 #endif
210 dev->dev_addr[i] = SA_prom[i];
211 }
212
213 ei_status.name = name;
214 ei_status.tx_start_page = start_page;
215 ei_status.stop_page = stop_page;
216 ei_status.word16 = 1;
217
218 ei_status.rx_start_page = start_page + TX_PAGES;
219
220 ei_status.reset_8390 = &zorro8390_reset_8390;
221 ei_status.block_input = &zorro8390_block_input;
222 ei_status.block_output = &zorro8390_block_output;
223 ei_status.get_8390_hdr = &zorro8390_get_8390_hdr;
224 ei_status.reg_offset = zorro8390_offsets;
225 dev->open = &zorro8390_open;
226 dev->stop = &zorro8390_close;
227 #ifdef CONFIG_NET_POLL_CONTROLLER
228 dev->poll_controller = ei_poll;
229 #endif
230
231 NS8390_init(dev, 0);
232 err = register_netdev(dev);
233 if (err) {
234 free_irq(IRQ_AMIGA_PORTS, dev);
235 return err;
236 }
237
238 printk(KERN_INFO "%s: %s at 0x%08lx, Ethernet Address "
239 "%02x:%02x:%02x:%02x:%02x:%02x\n", dev->name, name, board,
240 dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
241 dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
242
243 return 0;
244 }
245
246 static int zorro8390_open(struct net_device *dev)
247 {
248 ei_open(dev);
249 return 0;
250 }
251
252 static int zorro8390_close(struct net_device *dev)
253 {
254 if (ei_debug > 1)
255 printk(KERN_DEBUG "%s: Shutting down ethercard.\n", dev->name);
256 ei_close(dev);
257 return 0;
258 }
259
260 /* Hard reset the card. This used to pause for the same period that a
261 8390 reset command required, but that shouldn't be necessary. */
262 static void zorro8390_reset_8390(struct net_device *dev)
263 {
264 unsigned long reset_start_time = jiffies;
265
266 if (ei_debug > 1)
267 printk(KERN_DEBUG "resetting the 8390 t=%ld...\n", jiffies);
268
269 z_writeb(z_readb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
270
271 ei_status.txing = 0;
272 ei_status.dmaing = 0;
273
274 /* This check _should_not_ be necessary, omit eventually. */
275 while ((z_readb(NE_BASE+NE_EN0_ISR) & ENISR_RESET) == 0)
276 if (jiffies - reset_start_time > 2*HZ/100) {
277 printk(KERN_WARNING "%s: ne_reset_8390() did not complete.\n",
278 dev->name);
279 break;
280 }
281 z_writeb(ENISR_RESET, NE_BASE + NE_EN0_ISR); /* Ack intr. */
282 }
283
284 /* Grab the 8390 specific header. Similar to the block_input routine, but
285 we don't need to be concerned with ring wrap as the header will be at
286 the start of a page, so we optimize accordingly. */
287
288 static void zorro8390_get_8390_hdr(struct net_device *dev,
289 struct e8390_pkt_hdr *hdr, int ring_page)
290 {
291 int nic_base = dev->base_addr;
292 int cnt;
293 short *ptrs;
294
295 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
296 if (ei_status.dmaing) {
297 printk(KERN_ERR "%s: DMAing conflict in ne_get_8390_hdr "
298 "[DMAstat:%d][irqlock:%d].\n", dev->name, ei_status.dmaing,
299 ei_status.irqlock);
300 return;
301 }
302
303 ei_status.dmaing |= 0x01;
304 z_writeb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
305 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
306 z_writeb(sizeof(struct e8390_pkt_hdr), nic_base + NE_EN0_RCNTLO);
307 z_writeb(0, nic_base + NE_EN0_RCNTHI);
308 z_writeb(0, nic_base + NE_EN0_RSARLO); /* On page boundary */
309 z_writeb(ring_page, nic_base + NE_EN0_RSARHI);
310 z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
311
312 ptrs = (short*)hdr;
313 for (cnt = 0; cnt < (sizeof(struct e8390_pkt_hdr)>>1); cnt++)
314 *ptrs++ = z_readw(NE_BASE + NE_DATAPORT);
315
316 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
317
318 hdr->count = WORDSWAP(hdr->count);
319
320 ei_status.dmaing &= ~0x01;
321 }
322
323 /* Block input and output, similar to the Crynwr packet driver. If you
324 are porting to a new ethercard, look at the packet driver source for hints.
325 The NEx000 doesn't share the on-board packet memory -- you have to put
326 the packet out through the "remote DMA" dataport using z_writeb. */
327
328 static void zorro8390_block_input(struct net_device *dev, int count,
329 struct sk_buff *skb, int ring_offset)
330 {
331 int nic_base = dev->base_addr;
332 char *buf = skb->data;
333 short *ptrs;
334 int cnt;
335
336 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
337 if (ei_status.dmaing) {
338 printk(KERN_ERR "%s: DMAing conflict in ne_block_input "
339 "[DMAstat:%d][irqlock:%d].\n",
340 dev->name, ei_status.dmaing, ei_status.irqlock);
341 return;
342 }
343 ei_status.dmaing |= 0x01;
344 z_writeb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
345 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
346 z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
347 z_writeb(count >> 8, nic_base + NE_EN0_RCNTHI);
348 z_writeb(ring_offset & 0xff, nic_base + NE_EN0_RSARLO);
349 z_writeb(ring_offset >> 8, nic_base + NE_EN0_RSARHI);
350 z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
351 ptrs = (short*)buf;
352 for (cnt = 0; cnt < (count>>1); cnt++)
353 *ptrs++ = z_readw(NE_BASE + NE_DATAPORT);
354 if (count & 0x01)
355 buf[count-1] = z_readb(NE_BASE + NE_DATAPORT);
356
357 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
358 ei_status.dmaing &= ~0x01;
359 }
360
361 static void zorro8390_block_output(struct net_device *dev, int count,
362 const unsigned char *buf,
363 const int start_page)
364 {
365 int nic_base = NE_BASE;
366 unsigned long dma_start;
367 short *ptrs;
368 int cnt;
369
370 /* Round the count up for word writes. Do we need to do this?
371 What effect will an odd byte count have on the 8390?
372 I should check someday. */
373 if (count & 0x01)
374 count++;
375
376 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
377 if (ei_status.dmaing) {
378 printk(KERN_ERR "%s: DMAing conflict in ne_block_output."
379 "[DMAstat:%d][irqlock:%d]\n", dev->name, ei_status.dmaing,
380 ei_status.irqlock);
381 return;
382 }
383 ei_status.dmaing |= 0x01;
384 /* We should already be in page 0, but to be safe... */
385 z_writeb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
386
387 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
388
389 /* Now the normal output. */
390 z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
391 z_writeb(count >> 8, nic_base + NE_EN0_RCNTHI);
392 z_writeb(0x00, nic_base + NE_EN0_RSARLO);
393 z_writeb(start_page, nic_base + NE_EN0_RSARHI);
394
395 z_writeb(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
396 ptrs = (short*)buf;
397 for (cnt = 0; cnt < count>>1; cnt++)
398 z_writew(*ptrs++, NE_BASE+NE_DATAPORT);
399
400 dma_start = jiffies;
401
402 while ((z_readb(NE_BASE + NE_EN0_ISR) & ENISR_RDC) == 0)
403 if (jiffies - dma_start > 2*HZ/100) { /* 20ms */
404 printk(KERN_ERR "%s: timeout waiting for Tx RDC.\n",
405 dev->name);
406 zorro8390_reset_8390(dev);
407 NS8390_init(dev,1);
408 break;
409 }
410
411 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
412 ei_status.dmaing &= ~0x01;
413 return;
414 }
415
416 static void __devexit zorro8390_remove_one(struct zorro_dev *z)
417 {
418 struct net_device *dev = zorro_get_drvdata(z);
419
420 unregister_netdev(dev);
421 free_irq(IRQ_AMIGA_PORTS, dev);
422 release_mem_region(ZTWO_PADDR(dev->base_addr), NE_IO_EXTENT*2);
423 free_netdev(dev);
424 }
425
426 static int __init zorro8390_init_module(void)
427 {
428 return zorro_module_init(&zorro8390_driver);
429 }
430
431 static void __exit zorro8390_cleanup_module(void)
432 {
433 zorro_unregister_driver(&zorro8390_driver);
434 }
435
436 module_init(zorro8390_init_module);
437 module_exit(zorro8390_cleanup_module);
438
439 MODULE_LICENSE("GPL");
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