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";
72 struct net_device *sk_isa_probe(int unit);
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);
77 static unsigned short sk_isa_sifreadb(struct net_device *dev, unsigned short reg)
79 return inb(dev->base_addr + reg);
82 static unsigned short sk_isa_sifreadw(struct net_device *dev, unsigned short reg)
84 return inw(dev->base_addr + reg);
87 static void sk_isa_sifwriteb(struct net_device *dev, unsigned short val, unsigned short reg)
89 outb(val, dev->base_addr + reg);
92 static void sk_isa_sifwritew(struct net_device *dev, unsigned short val, unsigned short reg)
94 outw(val, dev->base_addr + reg);
98 static int __init sk_isa_probe1(struct net_device *dev, int ioaddr)
100 unsigned char old, chk1, chk2;
102 if (!request_region(ioaddr, SK_ISA_IO_EXTENT, isa_cardname))
105 old = inb(ioaddr + SIFADR); /* Get the old SIFADR value */
107 chk1 = 0; /* Begin with check value 0 */
109 /* Write new SIFADR value */
110 outb(chk1, ioaddr + SIFADR);
112 /* Read, invert and write */
113 chk2 = inb(ioaddr + SIFADD);
115 outb(chk2, ioaddr + SIFADR);
117 /* Read, invert and compare */
118 chk2 = inb(ioaddr + SIFADD);
122 release_region(ioaddr, SK_ISA_IO_EXTENT);
127 } while(chk1 != 0); /* Repeat 128 times (all byte values) */
129 /* Restore the SIFADR value */
130 outb(old, ioaddr + SIFADR);
132 dev->base_addr = ioaddr;
136 static int __init setup_card(struct net_device *dev)
138 struct net_local *tp;
139 static int versionprinted;
140 const unsigned *port;
146 SET_MODULE_OWNER(dev);
147 if (dev->base_addr) /* probe specific location */
148 err = sk_isa_probe1(dev, dev->base_addr);
150 for (port = portlist; *port; port++) {
151 err = sk_isa_probe1(dev, *port);
159 /* At this point we have found a valid card. */
161 if (versionprinted++ == 0)
162 printk(KERN_DEBUG "%s", version);
165 if (tmsdev_init(dev, ISA_MAX_ADDRESS, NULL))
168 dev->base_addr &= ~3;
170 sk_isa_read_eeprom(dev);
172 printk(KERN_DEBUG "%s: Ring Station Address: ", dev->name);
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 "%s: AutoSelect no IRQ available\n", dev->name);
211 for(j = 0; irqlist[j] != 0; j++)
212 if (irqlist[j] == dev->irq)
216 printk(KERN_INFO "%s: Illegal IRQ %d specified\n",
217 dev->name, dev->irq);
220 if (request_irq(dev->irq, tms380tr_interrupt, 0,
223 printk(KERN_INFO "%s: Selected IRQ %d not available\n",
224 dev->name, dev->irq);
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 "%s: AutoSelect no DMA available\n", dev->name);
246 for(j = 0; dmalist[j] != 0; j++)
247 if (dmalist[j] == dev->dma)
251 printk(KERN_INFO "%s: Illegal DMA %d specified\n",
252 dev->name, dev->dma);
255 if (request_dma(dev->dma, isa_cardname))
257 printk(KERN_INFO "%s: Selected DMA %d not available\n",
258 dev->name, dev->dma);
263 printk(KERN_DEBUG "%s: IO: %#4lx IRQ: %d DMA: %d\n",
264 dev->name, dev->base_addr, dev->irq, dev->dma);
266 err = register_netdev(dev);
274 free_irq(dev->irq, dev);
278 release_region(dev->base_addr, SK_ISA_IO_EXTENT);
282 struct net_device * __init sk_isa_probe(int unit)
284 struct net_device *dev = alloc_trdev(sizeof(struct net_local));
288 return ERR_PTR(-ENOMEM);
291 sprintf(dev->name, "tr%d", unit);
292 netdev_boot_setup_check(dev);
295 err = setup_card(dev);
306 * Reads MAC address from adapter RAM, which should've read it from
309 * Calling this on a board that does not support it can be a very
310 * dangerous thing. The Madge board, for instance, will lock your
311 * machine hard when this is called. Luckily, its supported in a
312 * separate driver. --ASF
314 static void sk_isa_read_eeprom(struct net_device *dev)
318 /* Address: 0000:0000 */
319 sk_isa_sifwritew(dev, 0, SIFADX);
320 sk_isa_sifwritew(dev, 0, SIFADR);
322 /* Read six byte MAC address data */
324 for(i = 0; i < 6; i++)
325 dev->dev_addr[i] = sk_isa_sifreadw(dev, SIFINC) >> 8;
328 unsigned short sk_isa_setnselout_pins(struct net_device *dev)
333 static int sk_isa_open(struct net_device *dev)
335 struct net_local *tp = netdev_priv(dev);
336 unsigned short val = 0;
337 unsigned short oldval;
341 for(i = 0; irqlist[i] != 0; i++)
343 if(irqlist[i] == dev->irq)
347 val |= CYCLE_TIME << 2;
351 if(tp->DataRate == SPEED_4)
352 val |= LINE_SPEED_BIT;
354 val &= ~LINE_SPEED_BIT;
355 oldval = sk_isa_sifreadb(dev, POSREG);
356 /* Leave cycle bits alone */
359 sk_isa_sifwriteb(dev, val, POSREG);
361 return tms380tr_open(dev);
366 #define ISATR_MAX_ADAPTERS 3
368 static int io[ISATR_MAX_ADAPTERS];
369 static int irq[ISATR_MAX_ADAPTERS];
370 static int dma[ISATR_MAX_ADAPTERS];
372 MODULE_LICENSE("GPL");
374 module_param_array(io, int, NULL, 0);
375 module_param_array(irq, int, NULL, 0);
376 module_param_array(dma, int, NULL, 0);
378 static struct net_device *sk_isa_dev[ISATR_MAX_ADAPTERS];
380 int init_module(void)
382 struct net_device *dev;
383 int i, num = 0, err = 0;
385 for (i = 0; i < ISATR_MAX_ADAPTERS ; i++) {
386 dev = alloc_trdev(sizeof(struct net_local));
390 dev->base_addr = io[i];
393 err = setup_card(dev);
403 printk(KERN_NOTICE "skisa.c: %d cards found.\n", num);
404 /* Probe for cards. */
406 printk(KERN_NOTICE "skisa.c: No cards found.\n");
412 void cleanup_module(void)
416 for (i = 0; i < ISATR_MAX_ADAPTERS ; i++) {
417 struct net_device *dev = sk_isa_dev[i];
422 unregister_netdev(dev);
423 release_region(dev->base_addr, SK_ISA_IO_EXTENT);
424 free_irq(dev->irq, dev);