1 /*
2 * skisa.c: A network driver for SK-NET TMS380-based ISA token ring cards.
3 *
4 * Based on tmspci written 1999 by Adam Fritzler
5 *
6 * Written 2000 by Jochen Friedrich
7 * Dedicated to my girlfriend Steffi Bopp
8 *
9 * This software may be used and distributed according to the terms
10 * of the GNU General Public License, incorporated herein by reference.
11 *
12 * This driver module supports the following cards:
13 * - SysKonnect TR4/16(+) ISA (SK-4190)
14 *
15 * Maintainer(s):
16 * AF Adam Fritzler
17 * JF Jochen Friedrich jochen@scram.de
18 *
19 * Modification History:
20 * 14-Jan-01 JF Created
21 * 28-Oct-02 JF Fixed probe of card for static compilation.
22 * Fixed module init to not make hotplug go wild.
23 * 09-Nov-02 JF Fixed early bail out on out of memory
24 * situations if multiple cards are found.
25 * Cleaned up some unnecessary console SPAM.
26 * 09-Dec-02 JF Fixed module reference counting.
27 * 02-Jan-03 JF Renamed to skisa.c
28 *
29 */
30 static const char version[] = "skisa.c: v1.03 09/12/2002 by Jochen Friedrich\n";
31
32 #include <linux/module.h>
33 #include <linux/kernel.h>
34 #include <linux/errno.h>
35 #include <linux/pci.h>
36 #include <linux/init.h>
37 #include <linux/netdevice.h>
38 #include <linux/trdevice.h>
39 #include <linux/platform_device.h>
40
41 #include <asm/system.h>
42 #include <asm/io.h>
43 #include <asm/irq.h>
44 #include <asm/pci.h>
45 #include <asm/dma.h>
46
47 #include "tms380tr.h"
48
49 #define SK_ISA_IO_EXTENT 32
50
51 /* A zero-terminated list of I/O addresses to be probed. */
52 static unsigned int portlist[] __initdata = {
53 0x0A20, 0x1A20, 0x0B20, 0x1B20, 0x0980, 0x1980, 0x0900, 0x1900,// SK
54 0
55 };
56
57 /* A zero-terminated list of IRQs to be probed.
58 * Used again after initial probe for sktr_chipset_init, called from sktr_open.
59 */
60 static const unsigned short irqlist[] = {
61 3, 5, 9, 10, 11, 12, 15,
62 0
63 };
64
65 /* A zero-terminated list of DMAs to be probed. */
66 static int dmalist[] __initdata = {
67 5, 6, 7,
68 0
69 };
70
71 static char isa_cardname[] = "SK NET TR 4/16 ISA\0";
72 static u64 dma_mask = ISA_MAX_ADDRESS;
73 static int sk_isa_open(struct net_device *dev);
74 static void sk_isa_read_eeprom(struct net_device *dev);
75 static unsigned short sk_isa_setnselout_pins(struct net_device *dev);
76
sk_isa_sifreadb(struct net_device * dev,unsigned short reg)77 static unsigned short sk_isa_sifreadb(struct net_device *dev, unsigned short reg)
78 {
79 return inb(dev->base_addr + reg);
80 }
81
sk_isa_sifreadw(struct net_device * dev,unsigned short reg)82 static unsigned short sk_isa_sifreadw(struct net_device *dev, unsigned short reg)
83 {
84 return inw(dev->base_addr + reg);
85 }
86
sk_isa_sifwriteb(struct net_device * dev,unsigned short val,unsigned short reg)87 static void sk_isa_sifwriteb(struct net_device *dev, unsigned short val, unsigned short reg)
88 {
89 outb(val, dev->base_addr + reg);
90 }
91
sk_isa_sifwritew(struct net_device * dev,unsigned short val,unsigned short reg)92 static void sk_isa_sifwritew(struct net_device *dev, unsigned short val, unsigned short reg)
93 {
94 outw(val, dev->base_addr + reg);
95 }
96
97
sk_isa_probe1(struct net_device * dev,int ioaddr)98 static int __init sk_isa_probe1(struct net_device *dev, int ioaddr)
99 {
100 unsigned char old, chk1, chk2;
101
102 if (!request_region(ioaddr, SK_ISA_IO_EXTENT, isa_cardname))
103 return -ENODEV;
104
105 old = inb(ioaddr + SIFADR); /* Get the old SIFADR value */
106
107 chk1 = 0; /* Begin with check value 0 */
108 do {
109 /* Write new SIFADR value */
110 outb(chk1, ioaddr + SIFADR);
111
112 /* Read, invert and write */
113 chk2 = inb(ioaddr + SIFADD);
114 chk2 ^= 0x0FE;
115 outb(chk2, ioaddr + SIFADR);
116
117 /* Read, invert and compare */
118 chk2 = inb(ioaddr + SIFADD);
119 chk2 ^= 0x0FE;
120
121 if(chk1 != chk2) {
122 release_region(ioaddr, SK_ISA_IO_EXTENT);
123 return -ENODEV;
124 }
125
126 chk1 -= 2;
127 } while(chk1 != 0); /* Repeat 128 times (all byte values) */
128
129 /* Restore the SIFADR value */
130 outb(old, ioaddr + SIFADR);
131
132 dev->base_addr = ioaddr;
133 return 0;
134 }
135
setup_card(struct net_device * dev,struct device * pdev)136 static int __init setup_card(struct net_device *dev, struct device *pdev)
137 {
138 struct net_local *tp;
139 static int versionprinted;
140 const unsigned *port;
141 int j, err = 0;
142
143 if (!dev)
144 return -ENOMEM;
145
146 if (dev->base_addr) /* probe specific location */
147 err = sk_isa_probe1(dev, dev->base_addr);
148 else {
149 for (port = portlist; *port; port++) {
150 err = sk_isa_probe1(dev, *port);
151 if (!err)
152 break;
153 }
154 }
155 if (err)
156 goto out5;
157
158 /* At this point we have found a valid card. */
159
160 if (versionprinted++ == 0)
161 printk(KERN_DEBUG "%s", version);
162
163 err = -EIO;
164 pdev->dma_mask = &dma_mask;
165 if (tmsdev_init(dev, pdev))
166 goto out4;
167
168 dev->base_addr &= ~3;
169
170 sk_isa_read_eeprom(dev);
171
172 printk(KERN_DEBUG "skisa.c: Ring Station Address: %pM\n",
173 dev->dev_addr);
174
175 tp = netdev_priv(dev);
176 tp->setnselout = sk_isa_setnselout_pins;
177
178 tp->sifreadb = sk_isa_sifreadb;
179 tp->sifreadw = sk_isa_sifreadw;
180 tp->sifwriteb = sk_isa_sifwriteb;
181 tp->sifwritew = sk_isa_sifwritew;
182
183 memcpy(tp->ProductID, isa_cardname, PROD_ID_SIZE + 1);
184
185 tp->tmspriv = NULL;
186
187 dev->open = sk_isa_open;
188 dev->stop = tms380tr_close;
189
190 if (dev->irq == 0)
191 {
192 for(j = 0; irqlist[j] != 0; j++)
193 {
194 dev->irq = irqlist[j];
195 if (!request_irq(dev->irq, tms380tr_interrupt, 0,
196 isa_cardname, dev))
197 break;
198 }
199
200 if(irqlist[j] == 0)
201 {
202 printk(KERN_INFO "skisa.c: AutoSelect no IRQ available\n");
203 goto out3;
204 }
205 }
206 else
207 {
208 for(j = 0; irqlist[j] != 0; j++)
209 if (irqlist[j] == dev->irq)
210 break;
211 if (irqlist[j] == 0)
212 {
213 printk(KERN_INFO "skisa.c: Illegal IRQ %d specified\n",
214 dev->irq);
215 goto out3;
216 }
217 if (request_irq(dev->irq, tms380tr_interrupt, 0,
218 isa_cardname, dev))
219 {
220 printk(KERN_INFO "skisa.c: Selected IRQ %d not available\n",
221 dev->irq);
222 goto out3;
223 }
224 }
225
226 if (dev->dma == 0)
227 {
228 for(j = 0; dmalist[j] != 0; j++)
229 {
230 dev->dma = dmalist[j];
231 if (!request_dma(dev->dma, isa_cardname))
232 break;
233 }
234
235 if(dmalist[j] == 0)
236 {
237 printk(KERN_INFO "skisa.c: AutoSelect no DMA available\n");
238 goto out2;
239 }
240 }
241 else
242 {
243 for(j = 0; dmalist[j] != 0; j++)
244 if (dmalist[j] == dev->dma)
245 break;
246 if (dmalist[j] == 0)
247 {
248 printk(KERN_INFO "skisa.c: Illegal DMA %d specified\n",
249 dev->dma);
250 goto out2;
251 }
252 if (request_dma(dev->dma, isa_cardname))
253 {
254 printk(KERN_INFO "skisa.c: Selected DMA %d not available\n",
255 dev->dma);
256 goto out2;
257 }
258 }
259
260 err = register_netdev(dev);
261 if (err)
262 goto out;
263
264 printk(KERN_DEBUG "%s: IO: %#4lx IRQ: %d DMA: %d\n",
265 dev->name, dev->base_addr, dev->irq, dev->dma);
266
267 return 0;
268 out:
269 free_dma(dev->dma);
270 out2:
271 free_irq(dev->irq, dev);
272 out3:
273 tmsdev_term(dev);
274 out4:
275 release_region(dev->base_addr, SK_ISA_IO_EXTENT);
276 out5:
277 return err;
278 }
279
280 /*
281 * Reads MAC address from adapter RAM, which should've read it from
282 * the onboard ROM.
283 *
284 * Calling this on a board that does not support it can be a very
285 * dangerous thing. The Madge board, for instance, will lock your
286 * machine hard when this is called. Luckily, its supported in a
287 * separate driver. --ASF
288 */
sk_isa_read_eeprom(struct net_device * dev)289 static void sk_isa_read_eeprom(struct net_device *dev)
290 {
291 int i;
292
293 /* Address: 0000:0000 */
294 sk_isa_sifwritew(dev, 0, SIFADX);
295 sk_isa_sifwritew(dev, 0, SIFADR);
296
297 /* Read six byte MAC address data */
298 dev->addr_len = 6;
299 for(i = 0; i < 6; i++)
300 dev->dev_addr[i] = sk_isa_sifreadw(dev, SIFINC) >> 8;
301 }
302
sk_isa_setnselout_pins(struct net_device * dev)303 static unsigned short sk_isa_setnselout_pins(struct net_device *dev)
304 {
305 return 0;
306 }
307
sk_isa_open(struct net_device * dev)308 static int sk_isa_open(struct net_device *dev)
309 {
310 struct net_local *tp = netdev_priv(dev);
311 unsigned short val = 0;
312 unsigned short oldval;
313 int i;
314
315 val = 0;
316 for(i = 0; irqlist[i] != 0; i++)
317 {
318 if(irqlist[i] == dev->irq)
319 break;
320 }
321
322 val |= CYCLE_TIME << 2;
323 val |= i << 4;
324 i = dev->dma - 5;
325 val |= i;
326 if(tp->DataRate == SPEED_4)
327 val |= LINE_SPEED_BIT;
328 else
329 val &= ~LINE_SPEED_BIT;
330 oldval = sk_isa_sifreadb(dev, POSREG);
331 /* Leave cycle bits alone */
332 oldval |= 0xf3;
333 val &= oldval;
334 sk_isa_sifwriteb(dev, val, POSREG);
335
336 return tms380tr_open(dev);
337 }
338
339 #define ISATR_MAX_ADAPTERS 3
340
341 static int io[ISATR_MAX_ADAPTERS];
342 static int irq[ISATR_MAX_ADAPTERS];
343 static int dma[ISATR_MAX_ADAPTERS];
344
345 MODULE_LICENSE("GPL");
346
347 module_param_array(io, int, NULL, 0);
348 module_param_array(irq, int, NULL, 0);
349 module_param_array(dma, int, NULL, 0);
350
351 static struct platform_device *sk_isa_dev[ISATR_MAX_ADAPTERS];
352
353 static struct platform_driver sk_isa_driver = {
354 .driver = {
355 .name = "skisa",
356 },
357 };
358
sk_isa_init(void)359 static int __init sk_isa_init(void)
360 {
361 struct net_device *dev;
362 struct platform_device *pdev;
363 int i, num = 0, err = 0;
364
365 err = platform_driver_register(&sk_isa_driver);
366 if (err)
367 return err;
368
369 for (i = 0; i < ISATR_MAX_ADAPTERS ; i++) {
370 dev = alloc_trdev(sizeof(struct net_local));
371 if (!dev)
372 continue;
373
374 dev->base_addr = io[i];
375 dev->irq = irq[i];
376 dev->dma = dma[i];
377 pdev = platform_device_register_simple("skisa",
378 i, NULL, 0);
379 if (IS_ERR(pdev)) {
380 free_netdev(dev);
381 continue;
382 }
383 err = setup_card(dev, &pdev->dev);
384 if (!err) {
385 sk_isa_dev[i] = pdev;
386 platform_set_drvdata(sk_isa_dev[i], dev);
387 ++num;
388 } else {
389 platform_device_unregister(pdev);
390 free_netdev(dev);
391 }
392 }
393
394 printk(KERN_NOTICE "skisa.c: %d cards found.\n", num);
395 /* Probe for cards. */
396 if (num == 0) {
397 printk(KERN_NOTICE "skisa.c: No cards found.\n");
398 platform_driver_unregister(&sk_isa_driver);
399 return -ENODEV;
400 }
401 return 0;
402 }
403
sk_isa_cleanup(void)404 static void __exit sk_isa_cleanup(void)
405 {
406 struct net_device *dev;
407 int i;
408
409 for (i = 0; i < ISATR_MAX_ADAPTERS ; i++) {
410 struct platform_device *pdev = sk_isa_dev[i];
411
412 if (!pdev)
413 continue;
414 dev = platform_get_drvdata(pdev);
415 unregister_netdev(dev);
416 release_region(dev->base_addr, SK_ISA_IO_EXTENT);
417 free_irq(dev->irq, dev);
418 free_dma(dev->dma);
419 tmsdev_term(dev);
420 free_netdev(dev);
421 platform_set_drvdata(pdev, NULL);
422 platform_device_unregister(pdev);
423 }
424 platform_driver_unregister(&sk_isa_driver);
425 }
426
427 module_init(sk_isa_init);
428 module_exit(sk_isa_cleanup);
429