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cap_syslog: accept CAP_SYS_ADMIN for now
[wandboard.git] / drivers / net / zorro8390.c
blobb78a38d9172a52d8517faba9df5cb914d5215e1c
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 MODULE_DEVICE_TABLE(zorro, zorro8390_zorro_tbl);
106
107 static struct zorro_driver zorro8390_driver = {
108 .name = "zorro8390",
109 .id_table = zorro8390_zorro_tbl,
110 .probe = zorro8390_init_one,
111 .remove = __devexit_p(zorro8390_remove_one),
112 };
113
114 static int __devinit zorro8390_init_one(struct zorro_dev *z,
115 const struct zorro_device_id *ent)
116 {
117 struct net_device *dev;
118 unsigned long board, ioaddr;
119 int err, i;
120
121 for (i = ARRAY_SIZE(cards)-1; i >= 0; i--)
122 if (z->id == cards[i].id)
123 break;
124 if (i < 0)
125 return -ENODEV;
126
127 board = z->resource.start;
128 ioaddr = board+cards[i].offset;
129 dev = alloc_ei_netdev();
130 if (!dev)
131 return -ENOMEM;
132 if (!request_mem_region(ioaddr, NE_IO_EXTENT*2, DRV_NAME)) {
133 free_netdev(dev);
134 return -EBUSY;
135 }
136 if ((err = zorro8390_init(dev, board, cards[i].name,
137 ZTWO_VADDR(ioaddr)))) {
138 release_mem_region(ioaddr, NE_IO_EXTENT*2);
139 free_netdev(dev);
140 return err;
141 }
142 zorro_set_drvdata(z, dev);
143 return 0;
144 }
145
146 static const struct net_device_ops zorro8390_netdev_ops = {
147 .ndo_open = zorro8390_open,
148 .ndo_stop = zorro8390_close,
149 .ndo_start_xmit = ei_start_xmit,
150 .ndo_tx_timeout = ei_tx_timeout,
151 .ndo_get_stats = ei_get_stats,
152 .ndo_set_multicast_list = ei_set_multicast_list,
153 .ndo_validate_addr = eth_validate_addr,
154 .ndo_set_mac_address = eth_mac_addr,
155 .ndo_change_mtu = eth_change_mtu,
156 #ifdef CONFIG_NET_POLL_CONTROLLER
157 .ndo_poll_controller = ei_poll,
158 #endif
159 };
160
161 static int __devinit zorro8390_init(struct net_device *dev,
162 unsigned long board, const char *name,
163 unsigned long ioaddr)
164 {
165 int i;
166 int err;
167 unsigned char SA_prom[32];
168 int start_page, stop_page;
169 static u32 zorro8390_offsets[16] = {
170 0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e,
171 0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e,
172 };
173
174 /* Reset card. Who knows what dain-bramaged state it was left in. */
175 {
176 unsigned long reset_start_time = jiffies;
177
178 z_writeb(z_readb(ioaddr + NE_RESET), ioaddr + NE_RESET);
179
180 while ((z_readb(ioaddr + NE_EN0_ISR) & ENISR_RESET) == 0)
181 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
182 printk(KERN_WARNING " not found (no reset ack).\n");
183 return -ENODEV;
184 }
185
186 z_writeb(0xff, ioaddr + NE_EN0_ISR); /* Ack all intr. */
187 }
188
189 /* Read the 16 bytes of station address PROM.
190 We must first initialize registers, similar to NS8390_init(eifdev, 0).
191 We can't reliably read the SAPROM address without this.
192 (I learned the hard way!). */
193 {
194 struct {
195 u32 value;
196 u32 offset;
197 } program_seq[] = {
198 {E8390_NODMA+E8390_PAGE0+E8390_STOP, NE_CMD}, /* Select page 0*/
199 {0x48, NE_EN0_DCFG}, /* Set byte-wide (0x48) access. */
200 {0x00, NE_EN0_RCNTLO}, /* Clear the count regs. */
201 {0x00, NE_EN0_RCNTHI},
202 {0x00, NE_EN0_IMR}, /* Mask completion irq. */
203 {0xFF, NE_EN0_ISR},
204 {E8390_RXOFF, NE_EN0_RXCR}, /* 0x20 Set to monitor */
205 {E8390_TXOFF, NE_EN0_TXCR}, /* 0x02 and loopback mode. */
206 {32, NE_EN0_RCNTLO},
207 {0x00, NE_EN0_RCNTHI},
208 {0x00, NE_EN0_RSARLO}, /* DMA starting at 0x0000. */
209 {0x00, NE_EN0_RSARHI},
210 {E8390_RREAD+E8390_START, NE_CMD},
211 };
212 for (i = 0; i < ARRAY_SIZE(program_seq); i++) {
213 z_writeb(program_seq[i].value, ioaddr + program_seq[i].offset);
214 }
215 }
216 for (i = 0; i < 16; i++) {
217 SA_prom[i] = z_readb(ioaddr + NE_DATAPORT);
218 (void)z_readb(ioaddr + NE_DATAPORT);
219 }
220
221 /* We must set the 8390 for word mode. */
222 z_writeb(0x49, ioaddr + NE_EN0_DCFG);
223 start_page = NESM_START_PG;
224 stop_page = NESM_STOP_PG;
225
226 dev->base_addr = ioaddr;
227 dev->irq = IRQ_AMIGA_PORTS;
228
229 /* Install the Interrupt handler */
230 i = request_irq(IRQ_AMIGA_PORTS, __ei_interrupt, IRQF_SHARED, DRV_NAME, dev);
231 if (i) return i;
232
233 for(i = 0; i < ETHER_ADDR_LEN; i++)
234 dev->dev_addr[i] = SA_prom[i];
235
236 #ifdef DEBUG
237 printk("%pM", dev->dev_addr);
238 #endif
239
240 ei_status.name = name;
241 ei_status.tx_start_page = start_page;
242 ei_status.stop_page = stop_page;
243 ei_status.word16 = 1;
244
245 ei_status.rx_start_page = start_page + TX_PAGES;
246
247 ei_status.reset_8390 = &zorro8390_reset_8390;
248 ei_status.block_input = &zorro8390_block_input;
249 ei_status.block_output = &zorro8390_block_output;
250 ei_status.get_8390_hdr = &zorro8390_get_8390_hdr;
251 ei_status.reg_offset = zorro8390_offsets;
252
253 dev->netdev_ops = &zorro8390_netdev_ops;
254 __NS8390_init(dev, 0);
255 err = register_netdev(dev);
256 if (err) {
257 free_irq(IRQ_AMIGA_PORTS, dev);
258 return err;
259 }
260
261 printk(KERN_INFO "%s: %s at 0x%08lx, Ethernet Address %pM\n",
262 dev->name, name, board, dev->dev_addr);
263
264 return 0;
265 }
266
267 static int zorro8390_open(struct net_device *dev)
268 {
269 __ei_open(dev);
270 return 0;
271 }
272
273 static int zorro8390_close(struct net_device *dev)
274 {
275 if (ei_debug > 1)
276 printk(KERN_DEBUG "%s: Shutting down ethercard.\n", dev->name);
277 __ei_close(dev);
278 return 0;
279 }
280
281 /* Hard reset the card. This used to pause for the same period that a
282 8390 reset command required, but that shouldn't be necessary. */
283 static void zorro8390_reset_8390(struct net_device *dev)
284 {
285 unsigned long reset_start_time = jiffies;
286
287 if (ei_debug > 1)
288 printk(KERN_DEBUG "resetting the 8390 t=%ld...\n", jiffies);
289
290 z_writeb(z_readb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
291
292 ei_status.txing = 0;
293 ei_status.dmaing = 0;
294
295 /* This check _should_not_ be necessary, omit eventually. */
296 while ((z_readb(NE_BASE+NE_EN0_ISR) & ENISR_RESET) == 0)
297 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
298 printk(KERN_WARNING "%s: ne_reset_8390() did not complete.\n",
299 dev->name);
300 break;
301 }
302 z_writeb(ENISR_RESET, NE_BASE + NE_EN0_ISR); /* Ack intr. */
303 }
304
305 /* Grab the 8390 specific header. Similar to the block_input routine, but
306 we don't need to be concerned with ring wrap as the header will be at
307 the start of a page, so we optimize accordingly. */
308
309 static void zorro8390_get_8390_hdr(struct net_device *dev,
310 struct e8390_pkt_hdr *hdr, int ring_page)
311 {
312 int nic_base = dev->base_addr;
313 int cnt;
314 short *ptrs;
315
316 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
317 if (ei_status.dmaing) {
318 printk(KERN_ERR "%s: DMAing conflict in ne_get_8390_hdr "
319 "[DMAstat:%d][irqlock:%d].\n", dev->name, ei_status.dmaing,
320 ei_status.irqlock);
321 return;
322 }
323
324 ei_status.dmaing |= 0x01;
325 z_writeb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
326 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
327 z_writeb(sizeof(struct e8390_pkt_hdr), nic_base + NE_EN0_RCNTLO);
328 z_writeb(0, nic_base + NE_EN0_RCNTHI);
329 z_writeb(0, nic_base + NE_EN0_RSARLO); /* On page boundary */
330 z_writeb(ring_page, nic_base + NE_EN0_RSARHI);
331 z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
332
333 ptrs = (short*)hdr;
334 for (cnt = 0; cnt < (sizeof(struct e8390_pkt_hdr)>>1); cnt++)
335 *ptrs++ = z_readw(NE_BASE + NE_DATAPORT);
336
337 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
338
339 hdr->count = WORDSWAP(hdr->count);
340
341 ei_status.dmaing &= ~0x01;
342 }
343
344 /* Block input and output, similar to the Crynwr packet driver. If you
345 are porting to a new ethercard, look at the packet driver source for hints.
346 The NEx000 doesn't share the on-board packet memory -- you have to put
347 the packet out through the "remote DMA" dataport using z_writeb. */
348
349 static void zorro8390_block_input(struct net_device *dev, int count,
350 struct sk_buff *skb, int ring_offset)
351 {
352 int nic_base = dev->base_addr;
353 char *buf = skb->data;
354 short *ptrs;
355 int cnt;
356
357 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
358 if (ei_status.dmaing) {
359 printk(KERN_ERR "%s: DMAing conflict in ne_block_input "
360 "[DMAstat:%d][irqlock:%d].\n",
361 dev->name, ei_status.dmaing, ei_status.irqlock);
362 return;
363 }
364 ei_status.dmaing |= 0x01;
365 z_writeb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
366 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
367 z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
368 z_writeb(count >> 8, nic_base + NE_EN0_RCNTHI);
369 z_writeb(ring_offset & 0xff, nic_base + NE_EN0_RSARLO);
370 z_writeb(ring_offset >> 8, nic_base + NE_EN0_RSARHI);
371 z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
372 ptrs = (short*)buf;
373 for (cnt = 0; cnt < (count>>1); cnt++)
374 *ptrs++ = z_readw(NE_BASE + NE_DATAPORT);
375 if (count & 0x01)
376 buf[count-1] = z_readb(NE_BASE + NE_DATAPORT);
377
378 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
379 ei_status.dmaing &= ~0x01;
380 }
381
382 static void zorro8390_block_output(struct net_device *dev, int count,
383 const unsigned char *buf,
384 const int start_page)
385 {
386 int nic_base = NE_BASE;
387 unsigned long dma_start;
388 short *ptrs;
389 int cnt;
390
391 /* Round the count up for word writes. Do we need to do this?
392 What effect will an odd byte count have on the 8390?
393 I should check someday. */
394 if (count & 0x01)
395 count++;
396
397 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
398 if (ei_status.dmaing) {
399 printk(KERN_ERR "%s: DMAing conflict in ne_block_output."
400 "[DMAstat:%d][irqlock:%d]\n", dev->name, ei_status.dmaing,
401 ei_status.irqlock);
402 return;
403 }
404 ei_status.dmaing |= 0x01;
405 /* We should already be in page 0, but to be safe... */
406 z_writeb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
407
408 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
409
410 /* Now the normal output. */
411 z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
412 z_writeb(count >> 8, nic_base + NE_EN0_RCNTHI);
413 z_writeb(0x00, nic_base + NE_EN0_RSARLO);
414 z_writeb(start_page, nic_base + NE_EN0_RSARHI);
415
416 z_writeb(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
417 ptrs = (short*)buf;
418 for (cnt = 0; cnt < count>>1; cnt++)
419 z_writew(*ptrs++, NE_BASE+NE_DATAPORT);
420
421 dma_start = jiffies;
422
423 while ((z_readb(NE_BASE + NE_EN0_ISR) & ENISR_RDC) == 0)
424 if (time_after(jiffies, dma_start + 2*HZ/100)) { /* 20ms */
425 printk(KERN_ERR "%s: timeout waiting for Tx RDC.\n",
426 dev->name);
427 zorro8390_reset_8390(dev);
428 __NS8390_init(dev,1);
429 break;
430 }
431
432 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
433 ei_status.dmaing &= ~0x01;
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");
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