aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net/zorro8390.c
blob: 9c73df4a0d307b781de5311a1ad8f148f826f62c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
/*
 *  Amiga Linux/m68k and Linux/PPC Zorro NS8390 Ethernet Driver
 *
 *  (C) Copyright 1998-2000 by some Elitist 680x0 Users(TM)
 *
 *  ---------------------------------------------------------------------------
 *
 *  This program is based on all the other NE2000 drivers for Linux
 *
 *  ---------------------------------------------------------------------------
 *
 *  This file is subject to the terms and conditions of the GNU General Public
 *  License.  See the file COPYING in the main directory of the Linux
 *  distribution for more details.
 *
 *  ---------------------------------------------------------------------------
 *
 *  The Ariadne II and X-Surf are Zorro-II boards containing Realtek RTL8019AS
 *  Ethernet Controllers.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/zorro.h>
#include <linux/jiffies.h>

#include <asm/system.h>
#include <asm/irq.h>
#include <asm/amigaints.h>
#include <asm/amigahw.h>

#define EI_SHIFT(x)	(ei_local->reg_offset[x])
#define ei_inb(port)   in_8(port)
#define ei_outb(val,port)  out_8(port,val)
#define ei_inb_p(port)   in_8(port)
#define ei_outb_p(val,port)  out_8(port,val)

static const char version[] =
    "8390.c:v1.10cvs 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";

#include "lib8390.c"

#define DRV_NAME	"zorro8390"

#define NE_BASE		(dev->base_addr)
#define NE_CMD		(0x00*2)
#define NE_DATAPORT	(0x10*2)	/* NatSemi-defined port window offset. */
#define NE_RESET	(0x1f*2)	/* Issue a read to reset, a write to clear. */
#define NE_IO_EXTENT	(0x20*2)

#define NE_EN0_ISR	(0x07*2)
#define NE_EN0_DCFG	(0x0e*2)

#define NE_EN0_RSARLO	(0x08*2)
#define NE_EN0_RSARHI	(0x09*2)
#define NE_EN0_RCNTLO	(0x0a*2)
#define NE_EN0_RXCR	(0x0c*2)
#define NE_EN0_TXCR	(0x0d*2)
#define NE_EN0_RCNTHI	(0x0b*2)
#define NE_EN0_IMR	(0x0f*2)

#define NESM_START_PG	0x40	/* First page of TX buffer */
#define NESM_STOP_PG	0x80	/* Last page +1 of RX ring */


#define WORDSWAP(a)	((((a)>>8)&0xff) | ((a)<<8))


static struct card_info {
    zorro_id id;
    const char *name;
    unsigned int offset;
} cards[] __devinitdata = {
    { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE2, "Ariadne II", 0x0600 },
    { ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, "X-Surf", 0x8600 },
};

static int __devinit zorro8390_init_one(struct zorro_dev *z,
					const struct zorro_device_id *ent);
static int __devinit zorro8390_init(struct net_device *dev,
				    unsigned long board, const char *name,
				    unsigned long ioaddr);
static int zorro8390_open(struct net_device *dev);
static int zorro8390_close(struct net_device *dev);
static void zorro8390_reset_8390(struct net_device *dev);
static void zorro8390_get_8390_hdr(struct net_device *dev,
				   struct e8390_pkt_hdr *hdr, int ring_page);
static void zorro8390_block_input(struct net_device *dev, int count,
				  struct sk_buff *skb, int ring_offset);
static void zorro8390_block_output(struct net_device *dev, const int count,
				   const unsigned char *buf,
				   const int start_page);
static void __devexit zorro8390_remove_one(struct zorro_dev *z);

static struct zorro_device_id zorro8390_zorro_tbl[] __devinitdata = {
    { ZORRO_PROD_VILLAGE_TRONIC_ARIADNE2, },
    { ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, },
    { 0 }
};

static struct zorro_driver zorro8390_driver = {
    .name	= "zorro8390",
    .id_table	= zorro8390_zorro_tbl,
    .probe	= zorro8390_init_one,
    .remove	= __devexit_p(zorro8390_remove_one),
};

static int __devinit zorro8390_init_one(struct zorro_dev *z,
					const struct zorro_device_id *ent)
{
    struct net_device *dev;
    unsigned long board, ioaddr;
    int err, i;

    for (i = ARRAY_SIZE(cards)-1; i >= 0; i--)
	if (z->id == cards[i].id)
	    break;
    board = z->resource.start;
    ioaddr = board+cards[i].offset;
    dev = ____alloc_ei_netdev(0);
    if (!dev)
	return -ENOMEM;
    if (!request_mem_region(ioaddr, NE_IO_EXTENT*2, DRV_NAME)) {
	free_netdev(dev);
	return -EBUSY;
    }
    if ((err = zorro8390_init(dev, board, cards[i].name,
			      ZTWO_VADDR(ioaddr)))) {
	release_mem_region(ioaddr, NE_IO_EXTENT*2);
	free_netdev(dev);
	return err;
    }
    zorro_set_drvdata(z, dev);
    return 0;
}

static int __devinit zorro8390_init(struct net_device *dev,
				    unsigned long board, const char *name,
				    unsigned long ioaddr)
{
    int i;
    int err;
    unsigned char SA_prom[32];
    int start_page, stop_page;
    static u32 zorro8390_offsets[16] = {
	0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e,
	0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e,
    };

    /* Reset card. Who knows what dain-bramaged state it was left in. */
    {
	unsigned long reset_start_time = jiffies;

	z_writeb(z_readb(ioaddr + NE_RESET), ioaddr + NE_RESET);

	while ((z_readb(ioaddr + NE_EN0_ISR) & ENISR_RESET) == 0)
	    if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
		printk(KERN_WARNING " not found (no reset ack).\n");
		return -ENODEV;
	    }

	z_writeb(0xff, ioaddr + NE_EN0_ISR);		/* Ack all intr. */
    }

    /* Read the 16 bytes of station address PROM.
       We must first initialize registers, similar to NS8390_init(eifdev, 0).
       We can't reliably read the SAPROM address without this.
       (I learned the hard way!). */
    {
	struct {
	    u32 value;
	    u32 offset;
	} program_seq[] = {
	    {E8390_NODMA+E8390_PAGE0+E8390_STOP, NE_CMD}, /* Select page 0*/
	    {0x48,	NE_EN0_DCFG},	/* Set byte-wide (0x48) access. */
	    {0x00,	NE_EN0_RCNTLO},	/* Clear the count regs. */
	    {0x00,	NE_EN0_RCNTHI},
	    {0x00,	NE_EN0_IMR},	/* Mask completion irq. */
	    {0xFF,	NE_EN0_ISR},
	    {E8390_RXOFF, NE_EN0_RXCR},	/* 0x20  Set to monitor */
	    {E8390_TXOFF, NE_EN0_TXCR},	/* 0x02  and loopback mode. */
	    {32,	NE_EN0_RCNTLO},
	    {0x00,	NE_EN0_RCNTHI},
	    {0x00,	NE_EN0_RSARLO},	/* DMA starting at 0x0000. */
	    {0x00,	NE_EN0_RSARHI},
	    {E8390_RREAD+E8390_START, NE_CMD},
	};
	for (i = 0; i < ARRAY_SIZE(program_seq); i++) {
	    z_writeb(program_seq[i].value, ioaddr + program_seq[i].offset);
	}
    }
    for (i = 0; i < 16; i++) {
	SA_prom[i] = z_readb(ioaddr + NE_DATAPORT);
	(void)z_readb(ioaddr + NE_DATAPORT);
    }

    /* We must set the 8390 for word mode. */
    z_writeb(0x49, ioaddr + NE_EN0_DCFG);
    start_page = NESM_START_PG;
    stop_page = NESM_STOP_PG;

    dev->base_addr = ioaddr;
    dev->irq = IRQ_AMIGA_PORTS;

    /* Install the Interrupt handler */
    i = request_irq(IRQ_AMIGA_PORTS, __ei_interrupt, IRQF_SHARED, DRV_NAME, dev);
    if (i) return i;

    for(i = 0; i < ETHER_ADDR_LEN; i++)
	dev->dev_addr[i] = SA_prom[i];

#ifdef DEBUG
    printk("%pM", dev->dev_addr);
#endif

    ei_status.name = name;
    ei_status.tx_start_page = start_page;
    ei_status.stop_page = stop_page;
    ei_status.word16 = 1;

    ei_status.rx_start_page = start_page + TX_PAGES;

    ei_status.reset_8390 = &zorro8390_reset_8390;
    ei_status.block_input = &zorro8390_block_input;
    ei_status.block_output = &zorro8390_block_output;
    ei_status.get_8390_hdr = &zorro8390_get_8390_hdr;
    ei_status.reg_offset = zorro8390_offsets;
    dev->open = &zorro8390_open;
    dev->stop = &zorro8390_close;
#ifdef CONFIG_NET_POLL_CONTROLLER
    dev->poll_controller = __ei_poll;
#endif

    __NS8390_init(dev, 0);
    err = register_netdev(dev);
    if (err) {
	free_irq(IRQ_AMIGA_PORTS, dev);
	return err;
    }

    printk(KERN_INFO "%s: %s at 0x%08lx, Ethernet Address %pM\n",
	   dev->name, name, board, dev->dev_addr);

    return 0;
}

static int zorro8390_open(struct net_device *dev)
{
    __ei_open(dev);
    return 0;
}

static int zorro8390_close(struct net_device *dev)
{
    if (ei_debug > 1)
	printk(KERN_DEBUG "%s: Shutting down ethercard.\n", dev->name);
    __ei_close(dev);
    return 0;
}

/* Hard reset the card.  This used to pause for the same period that a
   8390 reset command required, but that shouldn't be necessary. */
static void zorro8390_reset_8390(struct net_device *dev)
{
    unsigned long reset_start_time = jiffies;

    if (ei_debug > 1)
	printk(KERN_DEBUG "resetting the 8390 t=%ld...\n", jiffies);

    z_writeb(z_readb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);

    ei_status.txing = 0;
    ei_status.dmaing = 0;

    /* This check _should_not_ be necessary, omit eventually. */
    while ((z_readb(NE_BASE+NE_EN0_ISR) & ENISR_RESET) == 0)
	if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
	    printk(KERN_WARNING "%s: ne_reset_8390() did not complete.\n",
		   dev->name);
	    break;
	}
    z_writeb(ENISR_RESET, NE_BASE + NE_EN0_ISR);	/* Ack intr. */
}

/* Grab the 8390 specific header. Similar to the block_input routine, but
   we don't need to be concerned with ring wrap as the header will be at
   the start of a page, so we optimize accordingly. */

static void zorro8390_get_8390_hdr(struct net_device *dev,
				   struct e8390_pkt_hdr *hdr, int ring_page)
{
    int nic_base = dev->base_addr;
    int cnt;
    short *ptrs;

    /* This *shouldn't* happen. If it does, it's the last thing you'll see */
    if (ei_status.dmaing) {
	printk(KERN_ERR "%s: DMAing conflict in ne_get_8390_hdr "
	   "[DMAstat:%d][irqlock:%d].\n", dev->name, ei_status.dmaing,
	   ei_status.irqlock);
	return;
    }

    ei_status.dmaing |= 0x01;
    z_writeb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
    z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
    z_writeb(sizeof(struct e8390_pkt_hdr), nic_base + NE_EN0_RCNTLO);
    z_writeb(0, nic_base + NE_EN0_RCNTHI);
    z_writeb(0, nic_base + NE_EN0_RSARLO);		/* On page boundary */
    z_writeb(ring_page, nic_base + NE_EN0_RSARHI);
    z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);

    ptrs = (short*)hdr;
    for (cnt = 0; cnt < (sizeof(struct e8390_pkt_hdr)>>1); cnt++)
	*ptrs++ = z_readw(NE_BASE + NE_DATAPORT);

    z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);	/* Ack intr. */

    hdr->count = WORDSWAP(hdr->count);

    ei_status.dmaing &= ~0x01;
}

/* Block input and output, similar to the Crynwr packet driver.  If you
   are porting to a new ethercard, look at the packet driver source for hints.
   The NEx000 doesn't share the on-board packet memory -- you have to put
   the packet out through the "remote DMA" dataport using z_writeb. */

static void zorro8390_block_input(struct net_device *dev, int count,
				 struct sk_buff *skb, int ring_offset)
{
    int nic_base = dev->base_addr;
    char *buf = skb->data;
    short *ptrs;
    int cnt;

    /* This *shouldn't* happen. If it does, it's the last thing you'll see */
    if (ei_status.dmaing) {
	printk(KERN_ERR "%s: DMAing conflict in ne_block_input "
	   "[DMAstat:%d][irqlock:%d].\n",
	   dev->name, ei_status.dmaing, ei_status.irqlock);
	return;
    }
    ei_status.dmaing |= 0x01;
    z_writeb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
    z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
    z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
    z_writeb(count >> 8, nic_base + NE_EN0_RCNTHI);
    z_writeb(ring_offset & 0xff, nic_base + NE_EN0_RSARLO);
    z_writeb(ring_offset >> 8, nic_base + NE_EN0_RSARHI);
    z_writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
    ptrs = (short*)buf;
    for (cnt = 0; cnt < (count>>1); cnt++)
	*ptrs++ = z_readw(NE_BASE + NE_DATAPORT);
    if (count & 0x01)
	buf[count-1] = z_readb(NE_BASE + NE_DATAPORT);

    z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);	/* Ack intr. */
    ei_status.dmaing &= ~0x01;
}

static void zorro8390_block_output(struct net_device *dev, int count,
				   const unsigned char *buf,
				   const int start_page)
{
    int nic_base = NE_BASE;
    unsigned long dma_start;
    short *ptrs;
    int cnt;

    /* Round the count up for word writes.  Do we need to do this?
       What effect will an odd byte count have on the 8390?
       I should check someday. */
    if (count & 0x01)
	count++;

    /* This *shouldn't* happen. If it does, it's the last thing you'll see */
    if (ei_status.dmaing) {
	printk(KERN_ERR "%s: DMAing conflict in ne_block_output."
	   "[DMAstat:%d][irqlock:%d]\n", dev->name, ei_status.dmaing,
	   ei_status.irqlock);
	return;
    }
    ei_status.dmaing |= 0x01;
    /* We should already be in page 0, but to be safe... */
    z_writeb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);

    z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);

   /* Now the normal output. */
    z_writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
    z_writeb(count >> 8,   nic_base + NE_EN0_RCNTHI);
    z_writeb(0x00, nic_base + NE_EN0_RSARLO);
    z_writeb(start_page, nic_base + NE_EN0_RSARHI);

    z_writeb(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
    ptrs = (short*)buf;
    for (cnt = 0; cnt < count>>1; cnt++)
	z_writew(*ptrs++, NE_BASE+NE_DATAPORT);

    dma_start = jiffies;

    while ((z_readb(NE_BASE + NE_EN0_ISR) & ENISR_RDC) == 0)
	if (time_after(jiffies, dma_start + 2*HZ/100)) {	/* 20ms */
		printk(KERN_ERR "%s: timeout waiting for Tx RDC.\n",
		       dev->name);
		zorro8390_reset_8390(dev);
		__NS8390_init(dev,1);
		break;
	}

    z_writeb(ENISR_RDC, nic_base + NE_EN0_ISR);	/* Ack intr. */
    ei_status.dmaing &= ~0x01;
    return;
}

static void __devexit zorro8390_remove_one(struct zorro_dev *z)
{
    struct net_device *dev = zorro_get_drvdata(z);

    unregister_netdev(dev);
    free_irq(IRQ_AMIGA_PORTS, dev);
    release_mem_region(ZTWO_PADDR(dev->base_addr), NE_IO_EXTENT*2);
    free_netdev(dev);
}

static int __init zorro8390_init_module(void)
{
    return zorro_register_driver(&zorro8390_driver);
}

static void __exit zorro8390_cleanup_module(void)
{
    zorro_unregister_driver(&zorro8390_driver);
}

module_init(zorro8390_init_module);
module_exit(zorro8390_cleanup_module);

MODULE_LICENSE("GPL");