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x86/amd-iommu: Add per IOMMU reference counting
[linux/fpc-iii.git] / drivers / net / zorro8390.c
blob81c753a617ab93ab793b724428c9c0c97646da84
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 if (i < 0)
124 return -ENODEV;
125
126 board = z->resource.start;
127 ioaddr = board+cards[i].offset;
128 dev = alloc_ei_netdev();
129 if (!dev)
130 return -ENOMEM;
131 if (!request_mem_region(ioaddr, NE_IO_EXTENT*2, DRV_NAME)) {
132 free_netdev(dev);
133 return -EBUSY;
134 }
135 if ((err = zorro8390_init(dev, board, cards[i].name,
136 ZTWO_VADDR(ioaddr)))) {
137 release_mem_region(ioaddr, NE_IO_EXTENT*2);
138 free_netdev(dev);
139 return err;
140 }
141 zorro_set_drvdata(z, dev);
142 return 0;
143 }
144
145 static const struct net_device_ops zorro8390_netdev_ops = {
146 .ndo_open = zorro8390_open,
147 .ndo_stop = zorro8390_close,
148 .ndo_start_xmit = ei_start_xmit,
149 .ndo_tx_timeout = ei_tx_timeout,
150 .ndo_get_stats = ei_get_stats,
151 .ndo_set_multicast_list = ei_set_multicast_list,
152 .ndo_validate_addr = eth_validate_addr,
153 .ndo_set_mac_address = eth_mac_addr,
154 .ndo_change_mtu = eth_change_mtu,
155 #ifdef CONFIG_NET_POLL_CONTROLLER
156 .ndo_poll_controller = ei_poll,
157 #endif
158 };
159
160 static int __devinit zorro8390_init(struct net_device *dev,
161 unsigned long board, const char *name,
162 unsigned long ioaddr)
163 {
164 int i;
165 int err;
166 unsigned char SA_prom[32];
167 int start_page, stop_page;
168 static u32 zorro8390_offsets[16] = {
169 0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e,
170 0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e,
171 };
172
173 /* Reset card. Who knows what dain-bramaged state it was left in. */
174 {
175 unsigned long reset_start_time = jiffies;
176
177 z_writeb(z_readb(ioaddr + NE_RESET), ioaddr + NE_RESET);
178
179 while ((z_readb(ioaddr + NE_EN0_ISR) & ENISR_RESET) == 0)
180 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
181 printk(KERN_WARNING " not found (no reset ack).\n");
182 return -ENODEV;
183 }
184
185 z_writeb(0xff, ioaddr + NE_EN0_ISR); /* Ack all intr. */
186 }
187
188 /* Read the 16 bytes of station address PROM.
189 We must first initialize registers, similar to NS8390_init(eifdev, 0).
190 We can't reliably read the SAPROM address without this.
191 (I learned the hard way!). */
192 {
193 struct {
194 u32 value;
195 u32 offset;
196 } program_seq[] = {
197 {E8390_NODMA+E8390_PAGE0+E8390_STOP, NE_CMD}, /* Select page 0*/
198 {0x48, NE_EN0_DCFG}, /* Set byte-wide (0x48) access. */
199 {0x00, NE_EN0_RCNTLO}, /* Clear the count regs. */
200 {0x00, NE_EN0_RCNTHI},
201 {0x00, NE_EN0_IMR}, /* Mask completion irq. */
202 {0xFF, NE_EN0_ISR},
203 {E8390_RXOFF, NE_EN0_RXCR}, /* 0x20 Set to monitor */
204 {E8390_TXOFF, NE_EN0_TXCR}, /* 0x02 and loopback mode. */
205 {32, NE_EN0_RCNTLO},
206 {0x00, NE_EN0_RCNTHI},
207 {0x00, NE_EN0_RSARLO}, /* DMA starting at 0x0000. */
208 {0x00, NE_EN0_RSARHI},
209 {E8390_RREAD+E8390_START, NE_CMD},
210 };
211 for (i = 0; i < ARRAY_SIZE(program_seq); i++) {
212 z_writeb(program_seq[i].value, ioaddr + program_seq[i].offset);
213 }
214 }
215 for (i = 0; i < 16; i++) {
216 SA_prom[i] = z_readb(ioaddr + NE_DATAPORT);
217 (void)z_readb(ioaddr + NE_DATAPORT);
218 }
219
220 /* We must set the 8390 for word mode. */
221 z_writeb(0x49, ioaddr + NE_EN0_DCFG);
222 start_page = NESM_START_PG;
223 stop_page = NESM_STOP_PG;
224
225 dev->base_addr = ioaddr;
226 dev->irq = IRQ_AMIGA_PORTS;
227
228 /* Install the Interrupt handler */
229 i = request_irq(IRQ_AMIGA_PORTS, __ei_interrupt, IRQF_SHARED, DRV_NAME, dev);
230 if (i) return i;
231
232 for(i = 0; i < ETHER_ADDR_LEN; i++)
233 dev->dev_addr[i] = SA_prom[i];
234
235 #ifdef DEBUG
236 printk("%pM", dev->dev_addr);
237 #endif
238
239 ei_status.name = name;
240 ei_status.tx_start_page = start_page;
241 ei_status.stop_page = stop_page;
242 ei_status.word16 = 1;
243
244 ei_status.rx_start_page = start_page + TX_PAGES;
245
246 ei_status.reset_8390 = &zorro8390_reset_8390;
247 ei_status.block_input = &zorro8390_block_input;
248 ei_status.block_output = &zorro8390_block_output;
249 ei_status.get_8390_hdr = &zorro8390_get_8390_hdr;
250 ei_status.reg_offset = zorro8390_offsets;
251
252 dev->netdev_ops = &zorro8390_netdev_ops;
253 __NS8390_init(dev, 0);
254 err = register_netdev(dev);
255 if (err) {
256 free_irq(IRQ_AMIGA_PORTS, dev);
257 return err;
258 }
259
260 printk(KERN_INFO "%s: %s at 0x%08lx, Ethernet Address %pM\n",
261 dev->name, name, board, dev->dev_addr);
262
263 return 0;
264 }
265
266 static int zorro8390_open(struct net_device *dev)
267 {
268 __ei_open(dev);
269 return 0;
270 }
271
272 static int zorro8390_close(struct net_device *dev)
273 {
274 if (ei_debug > 1)
275 printk(KERN_DEBUG "%s: Shutting down ethercard.\n", dev->name);
276 __ei_close(dev);
277 return 0;
278 }
279
280 /* Hard reset the card. This used to pause for the same period that a
281 8390 reset command required, but that shouldn't be necessary. */
282 static void zorro8390_reset_8390(struct net_device *dev)
283 {
284 unsigned long reset_start_time = jiffies;
285
286 if (ei_debug > 1)
287 printk(KERN_DEBUG "resetting the 8390 t=%ld...\n", jiffies);
288
289 z_writeb(z_readb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
290
291 ei_status.txing = 0;
292 ei_status.dmaing = 0;
293
294 /* This check _should_not_ be necessary, omit eventually. */
295 while ((z_readb(NE_BASE+NE_EN0_ISR) & ENISR_RESET) == 0)
296 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
297 printk(KERN_WARNING "%s: ne_reset_8390() did not complete.\n",
298 dev->name);
299 break;
300 }
301 z_writeb(ENISR_RESET, NE_BASE + NE_EN0_ISR); /* Ack intr. */
302 }
303
304 /* Grab the 8390 specific header. Similar to the block_input routine, but
305 we don't need to be concerned with ring wrap as the header will be at
306 the start of a page, so we optimize accordingly. */
307
308 static void zorro8390_get_8390_hdr(struct net_device *dev,
309 struct e8390_pkt_hdr *hdr, int ring_page)
310 {
311 int nic_base = dev->base_addr;
312 int cnt;
313 short *ptrs;
314
315 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
316 if (ei_status.dmaing) {
317 printk(KERN_ERR "%s: DMAing conflict in ne_get_8390_hdr "
318 "[DMAstat:%d][irqlock:%d].\n", dev->name, ei_status.dmaing,
319 ei_status.irqlock);
320 return;
321 }
322
323 ei_status.dmaing |= 0x01;
324 z_writeb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
325 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
326 z_writeb(sizeof(struct e8390_pkt_hdr), nic_base + NE_EN0_RCNTLO);
327 z_writeb(0, nic_base + NE_EN0_RCNTHI);
328 z_writeb(0, nic_base + NE_EN0_RSARLO); /* On page boundary */
329 z_writeb(ring_page, nic_base + NE_EN0_RSARHI);
330 z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
331
332 ptrs = (short*)hdr;
333 for (cnt = 0; cnt < (sizeof(struct e8390_pkt_hdr)>>1); cnt++)
334 *ptrs++ = z_readw(NE_BASE + NE_DATAPORT);
335
336 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
337
338 hdr->count = WORDSWAP(hdr->count);
339
340 ei_status.dmaing &= ~0x01;
341 }
342
343 /* Block input and output, similar to the Crynwr packet driver. If you
344 are porting to a new ethercard, look at the packet driver source for hints.
345 The NEx000 doesn't share the on-board packet memory -- you have to put
346 the packet out through the "remote DMA" dataport using z_writeb. */
347
348 static void zorro8390_block_input(struct net_device *dev, int count,
349 struct sk_buff *skb, int ring_offset)
350 {
351 int nic_base = dev->base_addr;
352 char *buf = skb->data;
353 short *ptrs;
354 int cnt;
355
356 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
357 if (ei_status.dmaing) {
358 printk(KERN_ERR "%s: DMAing conflict in ne_block_input "
359 "[DMAstat:%d][irqlock:%d].\n",
360 dev->name, ei_status.dmaing, ei_status.irqlock);
361 return;
362 }
363 ei_status.dmaing |= 0x01;
364 z_writeb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
365 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
366 z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
367 z_writeb(count >> 8, nic_base + NE_EN0_RCNTHI);
368 z_writeb(ring_offset & 0xff, nic_base + NE_EN0_RSARLO);
369 z_writeb(ring_offset >> 8, nic_base + NE_EN0_RSARHI);
370 z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
371 ptrs = (short*)buf;
372 for (cnt = 0; cnt < (count>>1); cnt++)
373 *ptrs++ = z_readw(NE_BASE + NE_DATAPORT);
374 if (count & 0x01)
375 buf[count-1] = z_readb(NE_BASE + NE_DATAPORT);
376
377 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
378 ei_status.dmaing &= ~0x01;
379 }
380
381 static void zorro8390_block_output(struct net_device *dev, int count,
382 const unsigned char *buf,
383 const int start_page)
384 {
385 int nic_base = NE_BASE;
386 unsigned long dma_start;
387 short *ptrs;
388 int cnt;
389
390 /* Round the count up for word writes. Do we need to do this?
391 What effect will an odd byte count have on the 8390?
392 I should check someday. */
393 if (count & 0x01)
394 count++;
395
396 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
397 if (ei_status.dmaing) {
398 printk(KERN_ERR "%s: DMAing conflict in ne_block_output."
399 "[DMAstat:%d][irqlock:%d]\n", dev->name, ei_status.dmaing,
400 ei_status.irqlock);
401 return;
402 }
403 ei_status.dmaing |= 0x01;
404 /* We should already be in page 0, but to be safe... */
405 z_writeb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
406
407 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
408
409 /* Now the normal output. */
410 z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
411 z_writeb(count >> 8, nic_base + NE_EN0_RCNTHI);
412 z_writeb(0x00, nic_base + NE_EN0_RSARLO);
413 z_writeb(start_page, nic_base + NE_EN0_RSARHI);
414
415 z_writeb(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
416 ptrs = (short*)buf;
417 for (cnt = 0; cnt < count>>1; cnt++)
418 z_writew(*ptrs++, NE_BASE+NE_DATAPORT);
419
420 dma_start = jiffies;
421
422 while ((z_readb(NE_BASE + NE_EN0_ISR) & ENISR_RDC) == 0)
423 if (time_after(jiffies, dma_start + 2*HZ/100)) { /* 20ms */
424 printk(KERN_ERR "%s: timeout waiting for Tx RDC.\n",
425 dev->name);
426 zorro8390_reset_8390(dev);
427 __NS8390_init(dev,1);
428 break;
429 }
430
431 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
432 ei_status.dmaing &= ~0x01;
433 return;
434 }
435
436 static void __devexit zorro8390_remove_one(struct zorro_dev *z)
437 {
438 struct net_device *dev = zorro_get_drvdata(z);
439
440 unregister_netdev(dev);
441 free_irq(IRQ_AMIGA_PORTS, dev);
442 release_mem_region(ZTWO_PADDR(dev->base_addr), NE_IO_EXTENT*2);
443 free_netdev(dev);
444 }
445
446 static int __init zorro8390_init_module(void)
447 {
448 return zorro_register_driver(&zorro8390_driver);
449 }
450
451 static void __exit zorro8390_cleanup_module(void)
452 {
453 zorro_unregister_driver(&zorro8390_driver);
454 }
455
456 module_init(zorro8390_init_module);
457 module_exit(zorro8390_cleanup_module);
458
459 MODULE_LICENSE("GPL");
Linux with added FPC-III support