2 * skisa.c: A network driver for SK-NET TMS380-based ISA token ring cards.
4 * Based on tmspci written 1999 by Adam Fritzler
6 * Written 2000 by Jochen Friedrich
7 * Dedicated to my girlfriend Steffi Bopp
9 * This software may be used and distributed according to the terms
10 * of the GNU General Public License, incorporated herein by reference.
12 * This driver module supports the following cards:
13 * - SysKonnect TR4/16(+) ISA (SK-4190)
16 * AF Adam Fritzler mid@auk.cx
17 * JF Jochen Friedrich jochen@scram.de
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
30 static const char version[] = "skisa.c: v1.03 09/12/2002 by Jochen Friedrich\n";
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>
40 #include <asm/system.h>
48 #define SK_ISA_IO_EXTENT 32
50 /* A zero-terminated list of I/O addresses to be probed. */
51 static unsigned int portlist[] __initdata = {
52 0x0A20, 0x1A20, 0x0B20, 0x1B20, 0x0980, 0x1980, 0x0900, 0x1900,// SK
56 /* A zero-terminated list of IRQs to be probed.
57 * Used again after initial probe for sktr_chipset_init, called from sktr_open.
59 static const unsigned short irqlist[] = {
60 3, 5, 9, 10, 11, 12, 15,
64 /* A zero-terminated list of DMAs to be probed. */
65 static int dmalist[] __initdata = {
70 static char isa_cardname[] = "SK NET TR 4/16 ISA\0";
71 static u64 dma_mask = ISA_MAX_ADDRESS;
72 static int sk_isa_open(struct net_device *dev);
73 static void sk_isa_read_eeprom(struct net_device *dev);
74 static unsigned short sk_isa_setnselout_pins(struct net_device *dev);
76 static unsigned short sk_isa_sifreadb(struct net_device *dev, unsigned short reg)
78 return inb(dev->base_addr + reg);
81 static unsigned short sk_isa_sifreadw(struct net_device *dev, unsigned short reg)
83 return inw(dev->base_addr + reg);
86 static void sk_isa_sifwriteb(struct net_device *dev, unsigned short val, unsigned short reg)
88 outb(val, dev->base_addr + reg);
91 static void sk_isa_sifwritew(struct net_device *dev, unsigned short val, unsigned short reg)
93 outw(val, dev->base_addr + reg);
97 static int __init sk_isa_probe1(struct net_device *dev, int ioaddr)
99 unsigned char old, chk1, chk2;
101 if (!request_region(ioaddr, SK_ISA_IO_EXTENT, isa_cardname))
104 old = inb(ioaddr + SIFADR); /* Get the old SIFADR value */
106 chk1 = 0; /* Begin with check value 0 */
108 /* Write new SIFADR value */
109 outb(chk1, ioaddr + SIFADR);
111 /* Read, invert and write */
112 chk2 = inb(ioaddr + SIFADD);
114 outb(chk2, ioaddr + SIFADR);
116 /* Read, invert and compare */
117 chk2 = inb(ioaddr + SIFADD);
121 release_region(ioaddr, SK_ISA_IO_EXTENT);
126 } while(chk1 != 0); /* Repeat 128 times (all byte values) */
128 /* Restore the SIFADR value */
129 outb(old, ioaddr + SIFADR);
131 dev->base_addr = ioaddr;
135 static int __init setup_card(struct net_device *dev, struct device *pdev)
137 struct net_local *tp;
138 static int versionprinted;
139 const unsigned *port;
145 SET_MODULE_OWNER(dev);
146 if (dev->base_addr) /* probe specific location */
147 err = sk_isa_probe1(dev, dev->base_addr);
149 for (port = portlist; *port; port++) {
150 err = sk_isa_probe1(dev, *port);
158 /* At this point we have found a valid card. */
160 if (versionprinted++ == 0)
161 printk(KERN_DEBUG "%s", version);
164 pdev->dma_mask = &dma_mask;
165 if (tmsdev_init(dev, pdev))
168 dev->base_addr &= ~3;
170 sk_isa_read_eeprom(dev);
172 printk(KERN_DEBUG "skisa.c: Ring Station Address: ");
173 printk("%2.2x", dev->dev_addr[0]);
174 for (j = 1; j < 6; j++)
175 printk(":%2.2x", dev->dev_addr[j]);
178 tp = netdev_priv(dev);
179 tp->setnselout = sk_isa_setnselout_pins;
181 tp->sifreadb = sk_isa_sifreadb;
182 tp->sifreadw = sk_isa_sifreadw;
183 tp->sifwriteb = sk_isa_sifwriteb;
184 tp->sifwritew = sk_isa_sifwritew;
186 memcpy(tp->ProductID, isa_cardname, PROD_ID_SIZE + 1);
190 dev->open = sk_isa_open;
191 dev->stop = tms380tr_close;
195 for(j = 0; irqlist[j] != 0; j++)
197 dev->irq = irqlist[j];
198 if (!request_irq(dev->irq, tms380tr_interrupt, 0,
205 printk(KERN_INFO "skisa.c: AutoSelect no IRQ available\n");
211 for(j = 0; irqlist[j] != 0; j++)
212 if (irqlist[j] == dev->irq)
216 printk(KERN_INFO "skisa.c: Illegal IRQ %d specified\n",
220 if (request_irq(dev->irq, tms380tr_interrupt, 0,
223 printk(KERN_INFO "skisa.c: Selected IRQ %d not available\n",
231 for(j = 0; dmalist[j] != 0; j++)
233 dev->dma = dmalist[j];
234 if (!request_dma(dev->dma, isa_cardname))
240 printk(KERN_INFO "skisa.c: AutoSelect no DMA available\n");
246 for(j = 0; dmalist[j] != 0; j++)
247 if (dmalist[j] == dev->dma)
251 printk(KERN_INFO "skisa.c: Illegal DMA %d specified\n",
255 if (request_dma(dev->dma, isa_cardname))
257 printk(KERN_INFO "skisa.c: Selected DMA %d not available\n",
263 err = register_netdev(dev);
267 printk(KERN_DEBUG "%s: IO: %#4lx IRQ: %d DMA: %d\n",
268 dev->name, dev->base_addr, dev->irq, dev->dma);
274 free_irq(dev->irq, dev);
278 release_region(dev->base_addr, SK_ISA_IO_EXTENT);
284 * Reads MAC address from adapter RAM, which should've read it from
287 * Calling this on a board that does not support it can be a very
288 * dangerous thing. The Madge board, for instance, will lock your
289 * machine hard when this is called. Luckily, its supported in a
290 * separate driver. --ASF
292 static void sk_isa_read_eeprom(struct net_device *dev)
296 /* Address: 0000:0000 */
297 sk_isa_sifwritew(dev, 0, SIFADX);
298 sk_isa_sifwritew(dev, 0, SIFADR);
300 /* Read six byte MAC address data */
302 for(i = 0; i < 6; i++)
303 dev->dev_addr[i] = sk_isa_sifreadw(dev, SIFINC) >> 8;
306 unsigned short sk_isa_setnselout_pins(struct net_device *dev)
311 static int sk_isa_open(struct net_device *dev)
313 struct net_local *tp = netdev_priv(dev);
314 unsigned short val = 0;
315 unsigned short oldval;
319 for(i = 0; irqlist[i] != 0; i++)
321 if(irqlist[i] == dev->irq)
325 val |= CYCLE_TIME << 2;
329 if(tp->DataRate == SPEED_4)
330 val |= LINE_SPEED_BIT;
332 val &= ~LINE_SPEED_BIT;
333 oldval = sk_isa_sifreadb(dev, POSREG);
334 /* Leave cycle bits alone */
337 sk_isa_sifwriteb(dev, val, POSREG);
339 return tms380tr_open(dev);
342 #define ISATR_MAX_ADAPTERS 3
344 static int io[ISATR_MAX_ADAPTERS];
345 static int irq[ISATR_MAX_ADAPTERS];
346 static int dma[ISATR_MAX_ADAPTERS];
348 MODULE_LICENSE("GPL");
350 module_param_array(io, int, NULL, 0);
351 module_param_array(irq, int, NULL, 0);
352 module_param_array(dma, int, NULL, 0);
354 static struct platform_device *sk_isa_dev[ISATR_MAX_ADAPTERS];
356 static struct device_driver sk_isa_driver = {
358 .bus = &platform_bus_type,
361 static int __init sk_isa_init(void)
363 struct net_device *dev;
364 struct platform_device *pdev;
365 int i, num = 0, err = 0;
367 err = driver_register(&sk_isa_driver);
371 for (i = 0; i < ISATR_MAX_ADAPTERS ; i++) {
372 dev = alloc_trdev(sizeof(struct net_local));
376 dev->base_addr = io[i];
379 pdev = platform_device_register_simple("skisa",
381 err = setup_card(dev, &pdev->dev);
383 sk_isa_dev[i] = pdev;
384 dev_set_drvdata(&sk_isa_dev[i]->dev, dev);
387 platform_device_unregister(pdev);
392 printk(KERN_NOTICE "skisa.c: %d cards found.\n", num);
393 /* Probe for cards. */
395 printk(KERN_NOTICE "skisa.c: No cards found.\n");
401 static void __exit sk_isa_cleanup(void)
403 struct net_device *dev;
406 for (i = 0; i < ISATR_MAX_ADAPTERS ; i++) {
407 struct platform_device *pdev = sk_isa_dev[i];
411 dev = dev_get_drvdata(&pdev->dev);
412 unregister_netdev(dev);
413 release_region(dev->base_addr, SK_ISA_IO_EXTENT);
414 free_irq(dev->irq, dev);
418 dev_set_drvdata(&pdev->dev, NULL);
419 platform_device_unregister(pdev);
421 driver_unregister(&sk_isa_driver);
424 module_init(sk_isa_init);
425 module_exit(sk_isa_cleanup);