2  * Linux ARCnet driver - COM90xx chipset (memory-mapped buffers)
4  * Written 1994-1999 by Avery Pennarun.
38 #include <linux/io.h>
43 /* Define this to speed up the autoprobe by assuming if only one io port and
49  * it on - I think it should be fine if you only have one ARCnet card
86 static int io;			/* use the insmod io= irq= shmem= options */  variable
91 module_param_hw(io, int, ioport, 0);
100 	int ports[(0x3f0 - 0x200) / 16 + 1] = {	0 };  in com90xx_probe()
107 	if (!io && !irq && !shmem && !*device && com90xx_skip_probe)  in com90xx_probe()
110 	shmems = kzalloc(((0x100000 - 0xa0000) / 0x800) * sizeof(unsigned long),  in com90xx_probe()
114 	iomem = kzalloc(((0x100000 - 0xa0000) / 0x800) * sizeof(void __iomem *),  in com90xx_probe()
122 		pr_info("%s\n", "COM90xx chipset support");  in com90xx_probe()
126 	if (io)  in com90xx_probe()
127 		ports[numports++] = io;  in com90xx_probe()
138 	 * (empty), and reset any others by reading the reset port.  in com90xx_probe()
140 	numprint = -1;  in com90xx_probe()
141 	for (port = &ports[0]; port - ports < numports; port++) {  in com90xx_probe()
145 			arc_cont(D_INIT, "\n");  in com90xx_probe()
154 			arc_cont(D_INIT_REASONS, "(request_region)\n");  in com90xx_probe()
158 			*port-- = ports[--numports];  in com90xx_probe()
162 			arc_cont(D_INIT_REASONS, "(empty)\n");  in com90xx_probe()
167 			*port-- = ports[--numports];  in com90xx_probe()
173 		arc_cont(D_INIT_REASONS, "\n");  in com90xx_probe()
178 	arc_cont(D_INIT, "\n");  in com90xx_probe()
181 		arc_cont(D_NORMAL, "S1: No ARCnet cards found.\n");  in com90xx_probe()
186 	/* Stage 2: we have now reset any possible ARCnet cards, so we can't  in com90xx_probe()
190 	numprint = -1;  in com90xx_probe()
195 			arc_cont(D_INIT, "\n");  in com90xx_probe()
200 	arc_cont(D_INIT, "\n");  in com90xx_probe()
204 	 * 0xD1 byte in the right place, or are read-only.  in com90xx_probe()
206 	numprint = -1;  in com90xx_probe()
213 			arc_cont(D_INIT, "\n");  in com90xx_probe()
219 			arc_cont(D_INIT_REASONS, "(request_mem_region)\n");  in com90xx_probe()
227 			arc_cont(D_INIT_REASONS, "(ioremap)\n");  in com90xx_probe()
234 			arc_cont(D_INIT_REASONS, "(%02Xh != %02Xh)\n",  in com90xx_probe()
243 		 * sure no "mirror" shmem areas show up - if they occur  in com90xx_probe()
249 			arc_cont(D_INIT_REASONS, "(read only)\n");  in com90xx_probe()
253 		arc_cont(D_INIT_REASONS, "\n");  in com90xx_probe()
264 		*p-- = shmems[--numshmems];  in com90xx_probe()
265 		index--;  in com90xx_probe()
267 	arc_cont(D_INIT, "\n");  in com90xx_probe()
270 		arc_cont(D_NORMAL, "S3: No ARCnet cards found.\n");  in com90xx_probe()
280 	numprint = -1;  in com90xx_probe()
285 			arc_cont(D_INIT, "\n");  in com90xx_probe()
290 	arc_cont(D_INIT, "\n");  in com90xx_probe()
293 	 * the RESET flag, and (if no irq is given) generate an autoirq,  in com90xx_probe()
299 	numprint = -1;  in com90xx_probe()
306 			arc_cont(D_INIT, "\n");  in com90xx_probe()
316 			arc_cont(D_INIT_REASONS, "(status=%Xh)\n", status);  in com90xx_probe()
321 			*port-- = ports[--numports];  in com90xx_probe()
328 			arc_cont(D_INIT_REASONS, " (eternal reset, status=%Xh)\n",  in com90xx_probe()
334 			*port-- = ports[--numports];  in com90xx_probe()
342 			 * card has just reset and the NORXflag is on until  in com90xx_probe()
352 				arc_cont(D_INIT_REASONS, "(airq=%d)\n", airq);  in com90xx_probe()
357 				*port-- = ports[--numports];  in com90xx_probe()
368 		 * back its signature byte when the card is reset?  in com90xx_probe()
392 				arc_cont(D_INIT, "%lXh)\n", *p);  in com90xx_probe()
398 				numprint = -1;  in com90xx_probe()
401 				shmems[index] = shmems[--numshmems];  in com90xx_probe()
405 				arc_cont(D_INIT_REASONS, "%Xh-",  in com90xx_probe()
412 				pr_cont("no matching shmem)\n");  in com90xx_probe()
420 		*port-- = ports[--numports];  in com90xx_probe()
424 		pr_cont("\n");  in com90xx_probe()
439 	int res = -1;  in check_mirror()
442 		return -1;  in check_mirror()
471 		arc_cont(D_NORMAL, "com90xx: Can't allocate device!\n");  in com90xx_found()
474 		return -ENOMEM;  in com90xx_found()
479 	/* guess the actual size of one "memory mirror" - the number of  in com90xx_found()
485 	    check_mirror(shmem - MIRROR_SIZE, MIRROR_SIZE) == 0 &&  in com90xx_found()
486 	    check_mirror(shmem - 2 * MIRROR_SIZE, MIRROR_SIZE) == 1)  in com90xx_found()
489 	first_mirror = shmem - mirror_size;  in com90xx_found()
491 		first_mirror -= mirror_size;  in com90xx_found()
497 	last_mirror -= mirror_size;  in com90xx_found()
499 	dev->mem_start = first_mirror;  in com90xx_found()
500 	dev->mem_end = last_mirror + MIRROR_SIZE - 1;  in com90xx_found()
505 	if (!request_mem_region(dev->mem_start,  in com90xx_found()
506 				dev->mem_end - dev->mem_start + 1,  in com90xx_found()
512 		arc_printk(D_NORMAL, dev, "Can't get IRQ %d!\n", airq);  in com90xx_found()
515 	dev->irq = airq;  in com90xx_found()
518 	lp->card_name = "COM90xx";  in com90xx_found()
519 	lp->hw.command = com90xx_command;  in com90xx_found()
520 	lp->hw.status = com90xx_status;  in com90xx_found()
521 	lp->hw.intmask = com90xx_setmask;  in com90xx_found()
522 	lp->hw.reset = com90xx_reset;  in com90xx_found()
523 	lp->hw.owner = THIS_MODULE;  in com90xx_found()
524 	lp->hw.copy_to_card = com90xx_copy_to_card;  in com90xx_found()
525 	lp->hw.copy_from_card = com90xx_copy_from_card;  in com90xx_found()
526 	lp->mem_start = ioremap(dev->mem_start,  in com90xx_found()
527 				dev->mem_end - dev->mem_start + 1);  in com90xx_found()
528 	if (!lp->mem_start) {  in com90xx_found()
529 		arc_printk(D_NORMAL, dev, "Can't remap device memory!\n");  in com90xx_found()
534 	arcnet_set_addr(dev, arcnet_readb(lp->mem_start,  in com90xx_found()
537 	dev->base_addr = ioaddr;  in com90xx_found()
539 	arc_printk(D_NORMAL, dev, "COM90xx station %02Xh found at %03lXh, IRQ %d, ShMem %lXh (%ld*%xh).\n",  in com90xx_found()
540 		   dev->dev_addr[0],  in com90xx_found()
541 		   dev->base_addr, dev->irq, dev->mem_start,  in com90xx_found()
542 		   (dev->mem_end - dev->mem_start + 1) / mirror_size,  in com90xx_found()
552 	iounmap(lp->mem_start);  in com90xx_found()
554 	free_irq(dev->irq, dev);  in com90xx_found()
556 	release_mem_region(dev->mem_start, dev->mem_end - dev->mem_start + 1);  in com90xx_found()
559 	return -EIO;  in com90xx_found()
564 	short ioaddr = dev->base_addr;  in com90xx_command()
571 	short ioaddr = dev->base_addr;  in com90xx_status()
578 	short ioaddr = dev->base_addr;  in com90xx_setmask()
583 /* Do a hardware reset on the card, and set up necessary registers.
593 	short ioaddr = dev->base_addr;  in com90xx_reset()
595 	arc_printk(D_INIT, dev, "Resetting (status=%02Xh)\n",  in com90xx_reset()
599 		/* reset the card */  in com90xx_reset()
603 	/* clear flags & end reset */  in com90xx_reset()
614 	if (arcnet_readb(lp->mem_start, COM9026_REG_R_STATUS) != TESTvalue) {  in com90xx_reset()
616 			arc_printk(D_NORMAL, dev, "reset failed: TESTvalue not present.\n");  in com90xx_reset()
619 	/* enable extended (512-byte) packets */  in com90xx_reset()
624 		memset_io(lp->mem_start, 0x42, 2048);  in com90xx_reset()
634 	void __iomem *memaddr = lp->mem_start + bufnum * 512 + offset;  in com90xx_copy_to_card()
643 	void __iomem *memaddr = lp->mem_start + bufnum * 512 + offset;  in com90xx_copy_from_card()
656 		return -EIO;  in com90xx_init()
671 		free_irq(dev->irq, dev);  in com90xx_exit()
672 		iounmap(lp->mem_start);  in com90xx_exit()
673 		release_region(dev->base_addr, ARCNET_TOTAL_SIZE);  in com90xx_exit()
674 		release_mem_region(dev->mem_start,  in com90xx_exit()
675 				   dev->mem_end - dev->mem_start + 1);  in com90xx_exit()
690 		pr_notice("Disabled\n");  in com90xx_setup()
696 		pr_err("Too many arguments\n");  in com90xx_setup()
704 	case 1:		/* IO address */  in com90xx_setup()
705 		io = ints[1];  in com90xx_setup()