Root/drivers/net/zorro8390.c

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    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
145static 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
160static 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
266static int zorro8390_open(struct net_device *dev)
267{
268    __ei_open(dev);
269    return 0;
270}
271
272static 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. */
282static 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
308static 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
348static 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
381static 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
436static 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
446static int __init zorro8390_init_module(void)
447{
448    return zorro_register_driver(&zorro8390_driver);
449}
450
451static void __exit zorro8390_cleanup_module(void)
452{
453    zorro_unregister_driver(&zorro8390_driver);
454}
455
456module_init(zorro8390_init_module);
457module_exit(zorro8390_cleanup_module);
458
459MODULE_LICENSE("GPL");
460

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