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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* smc-mca.c: A SMC Ultra ethernet driver for linux. */
2/*
3 Most of this driver, except for ultramca_probe is nearly
4 verbatim from smc-ultra.c by Donald Becker. The rest is
5 written and copyright 1996 by David Weis, weisd3458@uni.edu
6
7 This is a driver for the SMC Ultra and SMC EtherEZ ethercards.
8
9 This driver uses the cards in the 8390-compatible, shared memory mode.
10 Most of the run-time complexity is handled by the generic code in
11 8390.c.
12
13 This driver enables the shared memory only when doing the actual data
14 transfers to avoid a bug in early version of the card that corrupted
15 data transferred by a AHA1542.
16
17 This driver does not support the programmed-I/O data transfer mode of
18 the EtherEZ. That support (if available) is smc-ez.c. Nor does it
19 use the non-8390-compatible "Altego" mode. (No support currently planned.)
20
21 Changelog:
22
23 Paul Gortmaker : multiple card support for module users.
24 David Weis : Micro Channel-ized it.
25 Tom Sightler : Added support for IBM PS/2 Ethernet Adapter/A
26 Christopher Turcksin : Changed MCA-probe so that multiple adapters are
27 found correctly (Jul 16, 1997)
28 Chris Beauregard : Tried to merge the two changes above (Dec 15, 1997)
29 Tom Sightler : Fixed minor detection bug caused by above merge
30 Tom Sightler : Added support for three more Western Digital
31 MCA-adapters
32 Tom Sightler : Added support for 2.2.x mca_find_unused_adapter
33 Hartmut Schmidt : - Modified parameter detection to handle each
34 card differently depending on a switch-list
35 - 'card_ver' removed from the adapter list
36 - Some minor bug fixes
37*/
38
39#include <linux/mca.h>
40#include <linux/module.h>
41#include <linux/kernel.h>
42#include <linux/errno.h>
43#include <linux/string.h>
44#include <linux/init.h>
45#include <linux/netdevice.h>
46#include <linux/etherdevice.h>
47
48#include <asm/io.h>
49#include <asm/system.h>
50
51#include "8390.h"
52#include "smc-mca.h"
53
54#define DRV_NAME "smc-mca"
55
56static int ultramca_open(struct net_device *dev);
57static void ultramca_reset_8390(struct net_device *dev);
58static void ultramca_get_8390_hdr(struct net_device *dev,
59 struct e8390_pkt_hdr *hdr,
60 int ring_page);
61static void ultramca_block_input(struct net_device *dev, int count,
62 struct sk_buff *skb,
63 int ring_offset);
64static void ultramca_block_output(struct net_device *dev, int count,
65 const unsigned char *buf,
66 const int start_page);
67static int ultramca_close_card(struct net_device *dev);
68
69#define START_PG 0x00 /* First page of TX buffer */
70
71#define ULTRA_CMDREG 0 /* Offset to ASIC command register. */
72#define ULTRA_RESET 0x80 /* Board reset, in ULTRA_CMDREG. */
73#define ULTRA_MEMENB 0x40 /* Enable the shared memory. */
74#define ULTRA_NIC_OFFSET 16 /* NIC register offset from the base_addr. */
75#define ULTRA_IO_EXTENT 32
76#define EN0_ERWCNT 0x08 /* Early receive warning count. */
77
78#define _61c8_SMC_Ethercard_PLUS_Elite_A_BNC_AUI_WD8013EP_A 0
79#define _61c9_SMC_Ethercard_PLUS_Elite_A_UTP_AUI_WD8013EP_A 1
80#define _6fc0_WD_Ethercard_PLUS_A_WD8003E_A_OR_WD8003ET_A 2
81#define _6fc1_WD_Starcard_PLUS_A_WD8003ST_A 3
82#define _6fc2_WD_Ethercard_PLUS_10T_A_WD8003W_A 4
83#define _efd4_IBM_PS2_Adapter_A_for_Ethernet_UTP_AUI_WD8013WP_A 5
84#define _efd5_IBM_PS2_Adapter_A_for_Ethernet_BNC_AUI_WD8013WP_A 6
85#define _efe5_IBM_PS2_Adapter_A_for_Ethernet 7
86
87struct smc_mca_adapters_t {
88 unsigned int id;
89 char *name;
90};
91
92#define MAX_ULTRAMCA_CARDS 4 /* Max number of Ultra cards per module */
93
94static int ultra_io[MAX_ULTRAMCA_CARDS];
95static int ultra_irq[MAX_ULTRAMCA_CARDS];
96MODULE_LICENSE("GPL");
97
98module_param_array(ultra_io, int, NULL, 0);
99module_param_array(ultra_irq, int, NULL, 0);
100MODULE_PARM_DESC(ultra_io, "SMC Ultra/EtherEZ MCA I/O base address(es)");
101MODULE_PARM_DESC(ultra_irq, "SMC Ultra/EtherEZ MCA IRQ number(s)");
102
103static short smc_mca_adapter_ids[] __initdata = {
104 0x61c8,
105 0x61c9,
106 0x6fc0,
107 0x6fc1,
108 0x6fc2,
109 0xefd4,
110 0xefd5,
111 0xefe5,
112 0x0000
113};
114
115static char *smc_mca_adapter_names[] __initdata = {
116 "SMC Ethercard PLUS Elite/A BNC/AUI (WD8013EP/A)",
117 "SMC Ethercard PLUS Elite/A UTP/AUI (WD8013WP/A)",
118 "WD Ethercard PLUS/A (WD8003E/A or WD8003ET/A)",
119 "WD Starcard PLUS/A (WD8003ST/A)",
120 "WD Ethercard PLUS 10T/A (WD8003W/A)",
121 "IBM PS/2 Adapter/A for Ethernet UTP/AUI (WD8013WP/A)",
122 "IBM PS/2 Adapter/A for Ethernet BNC/AUI (WD8013EP/A)",
123 "IBM PS/2 Adapter/A for Ethernet",
124 NULL
125};
126
127static int ultra_found = 0;
128
129int __init ultramca_probe(struct device *gen_dev)
130{
131 unsigned short ioaddr;
132 struct net_device *dev;
133 unsigned char reg4, num_pages;
134 struct mca_device *mca_dev = to_mca_device(gen_dev);
135 char slot = mca_dev->slot;
136 unsigned char pos2 = 0xff, pos3 = 0xff, pos4 = 0xff, pos5 = 0xff;
137 int i, rc;
138 int adapter = mca_dev->index;
139 int tbase = 0;
140 int tirq = 0;
141 int base_addr = ultra_io[ultra_found];
142 int irq = ultra_irq[ultra_found];
143
144 if (base_addr || irq) {
145 printk(KERN_INFO "Probing for SMC MCA adapter");
146 if (base_addr) {
147 printk(KERN_INFO " at I/O address 0x%04x%c",
148 base_addr, irq ? ' ' : '\n');
149 }
150 if (irq) {
151 printk(KERN_INFO "using irq %d\n", irq);
152 }
153 }
154
155 tirq = 0;
156 tbase = 0;
157
158 /* If we're trying to match a specificied irq or io address,
159 * we'll reject the adapter found unless it's the one we're
160 * looking for */
161
162 pos2 = mca_device_read_stored_pos(mca_dev, 2); /* io_addr */
163 pos3 = mca_device_read_stored_pos(mca_dev, 3); /* shared mem */
164 pos4 = mca_device_read_stored_pos(mca_dev, 4); /* ROM bios addr range */
165 pos5 = mca_device_read_stored_pos(mca_dev, 5); /* irq, media and RIPL */
166
167 /* Test the following conditions:
168 * - If an irq parameter is supplied, compare it
169 * with the irq of the adapter we found
170 * - If a base_addr paramater is given, compare it
171 * with the base_addr of the adapter we found
172 * - Check that the irq and the base_addr of the
173 * adapter we found is not already in use by
174 * this driver
175 */
176
177 switch (mca_dev->index) {
178 case _61c8_SMC_Ethercard_PLUS_Elite_A_BNC_AUI_WD8013EP_A:
179 case _61c9_SMC_Ethercard_PLUS_Elite_A_UTP_AUI_WD8013EP_A:
180 case _efd4_IBM_PS2_Adapter_A_for_Ethernet_UTP_AUI_WD8013WP_A:
181 case _efd5_IBM_PS2_Adapter_A_for_Ethernet_BNC_AUI_WD8013WP_A:
182 {
183 tbase = addr_table[(pos2 & 0xf0) >> 4].base_addr;
184 tirq = irq_table[(pos5 & 0xc) >> 2].new_irq;
185 break;
186 }
187 case _6fc0_WD_Ethercard_PLUS_A_WD8003E_A_OR_WD8003ET_A:
188 case _6fc1_WD_Starcard_PLUS_A_WD8003ST_A:
189 case _6fc2_WD_Ethercard_PLUS_10T_A_WD8003W_A:
190 case _efe5_IBM_PS2_Adapter_A_for_Ethernet:
191 {
192 tbase = ((pos2 & 0x0fe) * 0x10);
193 tirq = irq_table[(pos5 & 3)].old_irq;
194 break;
195 }
196 }
197
198 if(!tirq || !tbase
199 || (irq && irq != tirq)
200 || (base_addr && tbase != base_addr))
201 /* FIXME: we're trying to force the ordering of the
202 * devices here, there should be a way of getting this
203 * to happen */
204 return -ENXIO;
205
206 /* Adapter found. */
207 dev = alloc_ei_netdev();
208 if(!dev)
209 return -ENODEV;
210
211 SET_MODULE_OWNER(dev);
212 SET_NETDEV_DEV(dev, gen_dev);
213 mca_device_set_name(mca_dev, smc_mca_adapter_names[adapter]);
214 mca_device_set_claim(mca_dev, 1);
215
216 printk(KERN_INFO "smc_mca: %s found in slot %d\n",
217 smc_mca_adapter_names[adapter], slot + 1);
218
219 ultra_found++;
220
221 dev->base_addr = ioaddr = mca_device_transform_ioport(mca_dev, tbase);
222 dev->irq = mca_device_transform_irq(mca_dev, tirq);
223 dev->mem_start = 0;
224 num_pages = 40;
225
226 switch (adapter) { /* card-# in const array above [hs] */
227 case _61c8_SMC_Ethercard_PLUS_Elite_A_BNC_AUI_WD8013EP_A:
228 case _61c9_SMC_Ethercard_PLUS_Elite_A_UTP_AUI_WD8013EP_A:
229 {
230 for (i = 0; i < 16; i++) { /* taking 16 counts
231 * up to 15 [hs] */
232 if (mem_table[i].mem_index == (pos3 & ~MEM_MASK)) {
233 dev->mem_start = (unsigned long)
234 mca_device_transform_memory(mca_dev, (void *)mem_table[i].mem_start);
235 num_pages = mem_table[i].num_pages;
236 }
237 }
238 break;
239 }
240 case _6fc0_WD_Ethercard_PLUS_A_WD8003E_A_OR_WD8003ET_A:
241 case _6fc1_WD_Starcard_PLUS_A_WD8003ST_A:
242 case _6fc2_WD_Ethercard_PLUS_10T_A_WD8003W_A:
243 case _efe5_IBM_PS2_Adapter_A_for_Ethernet:
244 {
245 dev->mem_start = (unsigned long)
246 mca_device_transform_memory(mca_dev, (void *)((pos3 & 0xfc) * 0x1000));
247 num_pages = 0x40;
248 break;
249 }
250 case _efd4_IBM_PS2_Adapter_A_for_Ethernet_UTP_AUI_WD8013WP_A:
251 case _efd5_IBM_PS2_Adapter_A_for_Ethernet_BNC_AUI_WD8013WP_A:
252 {
253 /* courtesy of gamera@quartz.ocn.ne.jp, pos3 indicates
254 * the index of the 0x2000 step.
255 * beware different number of pages [hs]
256 */
257 dev->mem_start = (unsigned long)
258 mca_device_transform_memory(mca_dev, (void *)(0xc0000 + (0x2000 * (pos3 & 0xf))));
259 num_pages = 0x20 + (2 * (pos3 & 0x10));
260 break;
261 }
262 }
263
264 /* sanity check, shouldn't happen */
265 if (dev->mem_start == 0) {
266 rc = -ENODEV;
267 goto err_unclaim;
268 }
269
270 if (!request_region(ioaddr, ULTRA_IO_EXTENT, DRV_NAME)) {
271 rc = -ENODEV;
272 goto err_unclaim;
273 }
274
275 reg4 = inb(ioaddr + 4) & 0x7f;
276 outb(reg4, ioaddr + 4);
277
278 printk(KERN_INFO "smc_mca[%d]: Parameters: %#3x,", slot + 1, ioaddr);
279
280 for (i = 0; i < 6; i++)
281 printk(" %2.2X", dev->dev_addr[i] = inb(ioaddr + 8 + i));
282
283 /* Switch from the station address to the alternate register set
284 * and read the useful registers there.
285 */
286
287 outb(0x80 | reg4, ioaddr + 4);
288
289 /* Enable FINE16 mode to avoid BIOS ROM width mismatches @ reboot.
290 */
291
292 outb(0x80 | inb(ioaddr + 0x0c), ioaddr + 0x0c);
293
294 /* Switch back to the station address register set so that
295 * the MS-DOS driver can find the card after a warm boot.
296 */
297
298 outb(reg4, ioaddr + 4);
299
300 gen_dev->driver_data = dev;
301
302 /* The 8390 isn't at the base address, so fake the offset
303 */
304
305 dev->base_addr = ioaddr + ULTRA_NIC_OFFSET;
306
307 ei_status.name = "SMC Ultra MCA";
308 ei_status.word16 = 1;
309 ei_status.tx_start_page = START_PG;
310 ei_status.rx_start_page = START_PG + TX_PAGES;
311 ei_status.stop_page = num_pages;
312
313 ei_status.mem = ioremap(dev->mem_start, (ei_status.stop_page - START_PG) * 256);
314 if (!ei_status.mem) {
315 rc = -ENOMEM;
316 goto err_release_region;
317 }
318
319 dev->mem_end = dev->mem_start + (ei_status.stop_page - START_PG) * 256;
320
321 printk(", IRQ %d memory %#lx-%#lx.\n",
322 dev->irq, dev->mem_start, dev->mem_end - 1);
323
324 ei_status.reset_8390 = &ultramca_reset_8390;
325 ei_status.block_input = &ultramca_block_input;
326 ei_status.block_output = &ultramca_block_output;
327 ei_status.get_8390_hdr = &ultramca_get_8390_hdr;
328
329 ei_status.priv = slot;
330
331 dev->open = &ultramca_open;
332 dev->stop = &ultramca_close_card;
333#ifdef CONFIG_NET_POLL_CONTROLLER
334 dev->poll_controller = ei_poll;
335#endif
336
337 NS8390_init(dev, 0);
338
339 rc = register_netdev(dev);
340 if (rc)
341 goto err_unmap;
342
343 return 0;
344
345err_unmap:
346 iounmap(ei_status.mem);
347err_release_region:
348 release_region(ioaddr, ULTRA_IO_EXTENT);
349err_unclaim:
350 mca_device_set_claim(mca_dev, 0);
351 free_netdev(dev);
352 return rc;
353}
354
355static int ultramca_open(struct net_device *dev)
356{
357 int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
358 int retval;
359
360 if ((retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev)))
361 return retval;
362
363 outb(ULTRA_MEMENB, ioaddr); /* Enable memory */
364 outb(0x80, ioaddr + 5); /* ??? */
365 outb(0x01, ioaddr + 6); /* Enable interrupts and memory. */
366 outb(0x04, ioaddr + 5); /* ??? */
367
368 /* Set the early receive warning level in window 0 high enough not
369 * to receive ERW interrupts.
370 */
371
372 /* outb_p(E8390_NODMA + E8390_PAGE0, dev->base_addr);
373 * outb(0xff, dev->base_addr + EN0_ERWCNT);
374 */
375
376 ei_open(dev);
377 return 0;
378}
379
380static void ultramca_reset_8390(struct net_device *dev)
381{
382 int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
383
384 outb(ULTRA_RESET, ioaddr);
385 if (ei_debug > 1)
386 printk("resetting Ultra, t=%ld...", jiffies);
387 ei_status.txing = 0;
388
389 outb(0x80, ioaddr + 5); /* ??? */
390 outb(0x01, ioaddr + 6); /* Enable interrupts and memory. */
391
392 if (ei_debug > 1)
393 printk("reset done\n");
394 return;
395}
396
397/* Grab the 8390 specific header. Similar to the block_input routine, but
398 * we don't need to be concerned with ring wrap as the header will be at
399 * the start of a page, so we optimize accordingly.
400 */
401
402static void ultramca_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
403{
404 void __iomem *hdr_start = ei_status.mem + ((ring_page - START_PG) << 8);
405
406#ifdef notdef
407 /* Officially this is what we are doing, but the readl() is faster */
408 memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));
409#else
410 ((unsigned int*)hdr)[0] = readl(hdr_start);
411#endif
412}
413
414/* Block input and output are easy on shared memory ethercards, the only
415 * complication is when the ring buffer wraps.
416 */
417
418static void ultramca_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
419{
420 void __iomem *xfer_start = ei_status.mem + ring_offset - START_PG * 256;
421
422 if (ring_offset + count > ei_status.stop_page * 256) {
423 /* We must wrap the input move. */
424 int semi_count = ei_status.stop_page * 256 - ring_offset;
425 memcpy_fromio(skb->data, xfer_start, semi_count);
426 count -= semi_count;
427 memcpy_fromio(skb->data + semi_count, ei_status.mem + TX_PAGES * 256, count);
428 } else {
429 /* Packet is in one chunk -- we can copy + cksum. */
430 eth_io_copy_and_sum(skb, xfer_start, count, 0);
431 }
432
433}
434
435static void ultramca_block_output(struct net_device *dev, int count, const unsigned char *buf,
436 int start_page)
437{
438 void __iomem *shmem = ei_status.mem + ((start_page - START_PG) << 8);
439
440 memcpy_toio(shmem, buf, count);
441}
442
443static int ultramca_close_card(struct net_device *dev)
444{
445 int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */
446
447 netif_stop_queue(dev);
448
449 if (ei_debug > 1)
450 printk("%s: Shutting down ethercard.\n", dev->name);
451
452 outb(0x00, ioaddr + 6); /* Disable interrupts. */
453 free_irq(dev->irq, dev);
454
455 NS8390_init(dev, 0);
456 /* We should someday disable shared memory and change to 8-bit mode
457 * "just in case"...
458 */
459
460 return 0;
461}
462
463static int ultramca_remove(struct device *gen_dev)
464{
465 struct mca_device *mca_dev = to_mca_device(gen_dev);
466 struct net_device *dev = (struct net_device *)gen_dev->driver_data;
467
468 if (dev) {
469 /* NB: ultra_close_card() does free_irq */
470 int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET;
471
472 unregister_netdev(dev);
473 mca_device_set_claim(mca_dev, 0);
474 release_region(ioaddr, ULTRA_IO_EXTENT);
475 iounmap(ei_status.mem);
476 free_netdev(dev);
477 }
478 return 0;
479}
480
481
482static struct mca_driver ultra_driver = {
483 .id_table = smc_mca_adapter_ids,
484 .driver = {
485 .name = "smc-mca",
486 .bus = &mca_bus_type,
487 .probe = ultramca_probe,
488 .remove = ultramca_remove,
489 }
490};
491
492static int __init ultramca_init_module(void)
493{
494 if(!MCA_bus)
495 return -ENXIO;
496
497 mca_register_driver(&ultra_driver);
498
499 return ultra_found ? 0 : -ENXIO;
500}
501
502static void __exit ultramca_cleanup_module(void)
503{
504 mca_unregister_driver(&ultra_driver);
505}
506module_init(ultramca_init_module);
507module_exit(ultramca_cleanup_module);
508