tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
43static 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
74static 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
83static int __devinit zorro8390_init_one(struct zorro_dev *z,
84 const struct zorro_device_id *ent);
85static int __devinit zorro8390_init(struct net_device *dev,
86 unsigned long board, const char *name,
87 unsigned long ioaddr);
88static int zorro8390_open(struct net_device *dev);
89static int zorro8390_close(struct net_device *dev);
90static void zorro8390_reset_8390(struct net_device *dev);
91static void zorro8390_get_8390_hdr(struct net_device *dev,
92 struct e8390_pkt_hdr *hdr, int ring_page);
93static void zorro8390_block_input(struct net_device *dev, int count,
94 struct sk_buff *skb, int ring_offset);
95static void zorro8390_block_output(struct net_device *dev, const int count,
96 const unsigned char *buf,
97 const int start_page);
98static void __devexit zorro8390_remove_one(struct zorro_dev *z);
99
100static 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
106static 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
113static 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
142static 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 DECLARE_MAC_BUF(mac);
155
156 /* Reset card. Who knows what dain-bramaged state it was left in. */
157 {
158 unsigned long reset_start_time = jiffies;
159
160 z_writeb(z_readb(ioaddr + NE_RESET), ioaddr + NE_RESET);
161
162 while ((z_readb(ioaddr + NE_EN0_ISR) & ENISR_RESET) == 0)
163 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
164 printk(KERN_WARNING " not found (no reset ack).\n");
165 return -ENODEV;
166 }
167
168 z_writeb(0xff, ioaddr + NE_EN0_ISR); /* Ack all intr. */
169 }
170
171 /* Read the 16 bytes of station address PROM.
172 We must first initialize registers, similar to NS8390_init(eifdev, 0).
173 We can't reliably read the SAPROM address without this.
174 (I learned the hard way!). */
175 {
176 struct {
177 u32 value;
178 u32 offset;
179 } program_seq[] = {
180 {E8390_NODMA+E8390_PAGE0+E8390_STOP, NE_CMD}, /* Select page 0*/
181 {0x48, NE_EN0_DCFG}, /* Set byte-wide (0x48) access. */
182 {0x00, NE_EN0_RCNTLO}, /* Clear the count regs. */
183 {0x00, NE_EN0_RCNTHI},
184 {0x00, NE_EN0_IMR}, /* Mask completion irq. */
185 {0xFF, NE_EN0_ISR},
186 {E8390_RXOFF, NE_EN0_RXCR}, /* 0x20 Set to monitor */
187 {E8390_TXOFF, NE_EN0_TXCR}, /* 0x02 and loopback mode. */
188 {32, NE_EN0_RCNTLO},
189 {0x00, NE_EN0_RCNTHI},
190 {0x00, NE_EN0_RSARLO}, /* DMA starting at 0x0000. */
191 {0x00, NE_EN0_RSARHI},
192 {E8390_RREAD+E8390_START, NE_CMD},
193 };
194 for (i = 0; i < ARRAY_SIZE(program_seq); i++) {
195 z_writeb(program_seq[i].value, ioaddr + program_seq[i].offset);
196 }
197 }
198 for (i = 0; i < 16; i++) {
199 SA_prom[i] = z_readb(ioaddr + NE_DATAPORT);
200 (void)z_readb(ioaddr + NE_DATAPORT);
201 }
202
203 /* We must set the 8390 for word mode. */
204 z_writeb(0x49, ioaddr + NE_EN0_DCFG);
205 start_page = NESM_START_PG;
206 stop_page = NESM_STOP_PG;
207
208 dev->base_addr = ioaddr;
209 dev->irq = IRQ_AMIGA_PORTS;
210
211 /* Install the Interrupt handler */
212 i = request_irq(IRQ_AMIGA_PORTS, __ei_interrupt, IRQF_SHARED, DRV_NAME, dev);
213 if (i) return i;
214
215 for(i = 0; i < ETHER_ADDR_LEN; i++)
216 dev->dev_addr[i] = SA_prom[i];
217
218#ifdef DEBUG
219 printk("%s", print_mac(mac, dev->dev_addr));
220#endif
221
222 ei_status.name = name;
223 ei_status.tx_start_page = start_page;
224 ei_status.stop_page = stop_page;
225 ei_status.word16 = 1;
226
227 ei_status.rx_start_page = start_page + TX_PAGES;
228
229 ei_status.reset_8390 = &zorro8390_reset_8390;
230 ei_status.block_input = &zorro8390_block_input;
231 ei_status.block_output = &zorro8390_block_output;
232 ei_status.get_8390_hdr = &zorro8390_get_8390_hdr;
233 ei_status.reg_offset = zorro8390_offsets;
234 dev->open = &zorro8390_open;
235 dev->stop = &zorro8390_close;
236#ifdef CONFIG_NET_POLL_CONTROLLER
237 dev->poll_controller = __ei_poll;
238#endif
239
240 __NS8390_init(dev, 0);
241 err = register_netdev(dev);
242 if (err) {
243 free_irq(IRQ_AMIGA_PORTS, dev);
244 return err;
245 }
246
247 printk(KERN_INFO "%s: %s at 0x%08lx, Ethernet Address %s\n",
248 dev->name, name, board, print_mac(mac, dev->dev_addr));
249
250 return 0;
251}
252
253static int zorro8390_open(struct net_device *dev)
254{
255 __ei_open(dev);
256 return 0;
257}
258
259static int zorro8390_close(struct net_device *dev)
260{
261 if (ei_debug > 1)
262 printk(KERN_DEBUG "%s: Shutting down ethercard.\n", dev->name);
263 __ei_close(dev);
264 return 0;
265}
266
267/* Hard reset the card. This used to pause for the same period that a
268 8390 reset command required, but that shouldn't be necessary. */
269static void zorro8390_reset_8390(struct net_device *dev)
270{
271 unsigned long reset_start_time = jiffies;
272
273 if (ei_debug > 1)
274 printk(KERN_DEBUG "resetting the 8390 t=%ld...\n", jiffies);
275
276 z_writeb(z_readb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
277
278 ei_status.txing = 0;
279 ei_status.dmaing = 0;
280
281 /* This check _should_not_ be necessary, omit eventually. */
282 while ((z_readb(NE_BASE+NE_EN0_ISR) & ENISR_RESET) == 0)
283 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
284 printk(KERN_WARNING "%s: ne_reset_8390() did not complete.\n",
285 dev->name);
286 break;
287 }
288 z_writeb(ENISR_RESET, NE_BASE + NE_EN0_ISR); /* Ack intr. */
289}
290
291/* Grab the 8390 specific header. Similar to the block_input routine, but
292 we don't need to be concerned with ring wrap as the header will be at
293 the start of a page, so we optimize accordingly. */
294
295static void zorro8390_get_8390_hdr(struct net_device *dev,
296 struct e8390_pkt_hdr *hdr, int ring_page)
297{
298 int nic_base = dev->base_addr;
299 int cnt;
300 short *ptrs;
301
302 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
303 if (ei_status.dmaing) {
304 printk(KERN_ERR "%s: DMAing conflict in ne_get_8390_hdr "
305 "[DMAstat:%d][irqlock:%d].\n", dev->name, ei_status.dmaing,
306 ei_status.irqlock);
307 return;
308 }
309
310 ei_status.dmaing |= 0x01;
311 z_writeb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
312 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
313 z_writeb(sizeof(struct e8390_pkt_hdr), nic_base + NE_EN0_RCNTLO);
314 z_writeb(0, nic_base + NE_EN0_RCNTHI);
315 z_writeb(0, nic_base + NE_EN0_RSARLO); /* On page boundary */
316 z_writeb(ring_page, nic_base + NE_EN0_RSARHI);
317 z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
318
319 ptrs = (short*)hdr;
320 for (cnt = 0; cnt < (sizeof(struct e8390_pkt_hdr)>>1); cnt++)
321 *ptrs++ = z_readw(NE_BASE + NE_DATAPORT);
322
323 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
324
325 hdr->count = WORDSWAP(hdr->count);
326
327 ei_status.dmaing &= ~0x01;
328}
329
330/* Block input and output, similar to the Crynwr packet driver. If you
331 are porting to a new ethercard, look at the packet driver source for hints.
332 The NEx000 doesn't share the on-board packet memory -- you have to put
333 the packet out through the "remote DMA" dataport using z_writeb. */
334
335static void zorro8390_block_input(struct net_device *dev, int count,
336 struct sk_buff *skb, int ring_offset)
337{
338 int nic_base = dev->base_addr;
339 char *buf = skb->data;
340 short *ptrs;
341 int cnt;
342
343 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
344 if (ei_status.dmaing) {
345 printk(KERN_ERR "%s: DMAing conflict in ne_block_input "
346 "[DMAstat:%d][irqlock:%d].\n",
347 dev->name, ei_status.dmaing, ei_status.irqlock);
348 return;
349 }
350 ei_status.dmaing |= 0x01;
351 z_writeb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
352 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
353 z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
354 z_writeb(count >> 8, nic_base + NE_EN0_RCNTHI);
355 z_writeb(ring_offset & 0xff, nic_base + NE_EN0_RSARLO);
356 z_writeb(ring_offset >> 8, nic_base + NE_EN0_RSARHI);
357 z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
358 ptrs = (short*)buf;
359 for (cnt = 0; cnt < (count>>1); cnt++)
360 *ptrs++ = z_readw(NE_BASE + NE_DATAPORT);
361 if (count & 0x01)
362 buf[count-1] = z_readb(NE_BASE + NE_DATAPORT);
363
364 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
365 ei_status.dmaing &= ~0x01;
366}
367
368static void zorro8390_block_output(struct net_device *dev, int count,
369 const unsigned char *buf,
370 const int start_page)
371{
372 int nic_base = NE_BASE;
373 unsigned long dma_start;
374 short *ptrs;
375 int cnt;
376
377 /* Round the count up for word writes. Do we need to do this?
378 What effect will an odd byte count have on the 8390?
379 I should check someday. */
380 if (count & 0x01)
381 count++;
382
383 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
384 if (ei_status.dmaing) {
385 printk(KERN_ERR "%s: DMAing conflict in ne_block_output."
386 "[DMAstat:%d][irqlock:%d]\n", dev->name, ei_status.dmaing,
387 ei_status.irqlock);
388 return;
389 }
390 ei_status.dmaing |= 0x01;
391 /* We should already be in page 0, but to be safe... */
392 z_writeb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
393
394 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
395
396 /* Now the normal output. */
397 z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
398 z_writeb(count >> 8, nic_base + NE_EN0_RCNTHI);
399 z_writeb(0x00, nic_base + NE_EN0_RSARLO);
400 z_writeb(start_page, nic_base + NE_EN0_RSARHI);
401
402 z_writeb(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
403 ptrs = (short*)buf;
404 for (cnt = 0; cnt < count>>1; cnt++)
405 z_writew(*ptrs++, NE_BASE+NE_DATAPORT);
406
407 dma_start = jiffies;
408
409 while ((z_readb(NE_BASE + NE_EN0_ISR) & ENISR_RDC) == 0)
410 if (time_after(jiffies, dma_start + 2*HZ/100)) { /* 20ms */
411 printk(KERN_ERR "%s: timeout waiting for Tx RDC.\n",
412 dev->name);
413 zorro8390_reset_8390(dev);
414 __NS8390_init(dev,1);
415 break;
416 }
417
418 z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
419 ei_status.dmaing &= ~0x01;
420 return;
421}
422
423static void __devexit zorro8390_remove_one(struct zorro_dev *z)
424{
425 struct net_device *dev = zorro_get_drvdata(z);
426
427 unregister_netdev(dev);
428 free_irq(IRQ_AMIGA_PORTS, dev);
429 release_mem_region(ZTWO_PADDR(dev->base_addr), NE_IO_EXTENT*2);
430 free_netdev(dev);
431}
432
433static int __init zorro8390_init_module(void)
434{
435 return zorro_register_driver(&zorro8390_driver);
436}
437
438static void __exit zorro8390_cleanup_module(void)
439{
440 zorro_unregister_driver(&zorro8390_driver);
441}
442
443module_init(zorro8390_init_module);
444module_exit(zorro8390_cleanup_module);
445
446MODULE_LICENSE("GPL");