drivers/isdn/sc/init.c - kernel/msm-4.9 - Gitiles

 /*
  * This software may be used and distributed according to the terms
  * of the GNU General Public License, incorporated herein by reference.
  *
  */

 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/delay.h>
 #include "includes.h"
 #include "hardware.h"
 #include "card.h"

 MODULE_DESCRIPTION("ISDN4Linux: Driver for Spellcaster card");
 MODULE_AUTHOR("Spellcaster Telecommunications Inc.");
 MODULE_LICENSE("GPL");

 board *sc_adapter[MAX_CARDS];
 int cinst;

 static char devname[] = "scX";
 static const char version[] = "2.0b1";

 static const char *boardname[] = { "DataCommute/BRI", "DataCommute/PRI", "TeleCommute/BRI" };

 /* insmod set parameters */
 static unsigned int io[] = {0,0,0,0};
 static unsigned char irq[] = {0,0,0,0};
 static unsigned long ram[] = {0,0,0,0};
 static int do_reset = 0;

 module_param_array(io, int, NULL, 0);
 module_param_array(irq, int, NULL, 0);
 module_param_array(ram, int, NULL, 0);
 module_param(do_reset, bool, 0);

 static int identify_board(unsigned long, unsigned int);

 static int __init sc_init(void)
 {
 	int b = -1;
 	int i, j;
 	int status = -ENODEV;

 	unsigned long memsize = 0;
 	unsigned long features = 0;
 	isdn_if *interface;
 	unsigned char channels;
 	unsigned char pgport;
 	unsigned long magic;
 	int model;
 	int last_base = IOBASE_MIN;
 	int probe_exhasted = 0;

 #ifdef MODULE
 	pr_info("SpellCaster ISA ISDN Adapter Driver rev. %s Loaded\n", version);
 #else
 	pr_info("SpellCaster ISA ISDN Adapter Driver rev. %s\n", version);
 #endif
 	pr_info("Copyright (C) 1996 SpellCaster Telecommunications Inc.\n");

 	while(b++ < MAX_CARDS - 1) {
 		pr_debug("Probing for adapter #%d\n", b);
 		/*
 		 * Initialize reusable variables
 		 */
 		model = -1;
 		magic = 0;
 		channels = 0;
 		pgport = 0;

 		/*
 		 * See if we should probe for IO base
 		 */
 		pr_debug("I/O Base for board %d is 0x%x, %s probe\n", b, io[b],
 			io[b] == 0 ? "will" : "won't");
 		if(io[b]) {
 			/*
 			 * No, I/O Base has been provided
 			 */
 			for (i = 0 ; i < MAX_IO_REGS - 1 ; i++) {
 				if(!request_region(io[b] + i * 0x400, 1, "sc test")) {
 					pr_debug("request_region for 0x%x failed\n", io[b] + i * 0x400);
 					io[b] = 0;
 					break;
 				} else
 					release_region(io[b] + i * 0x400, 1);
 			}

 			/*
 			 * Confirm the I/O Address with a test
 			 */
 			if(io[b] == 0) {
 				pr_debug("I/O Address invalid.\n");
 				continue;
 			}

 			outb(0x18, io[b] + 0x400 * EXP_PAGE0);
 			if(inb(io[b] + 0x400 * EXP_PAGE0) != 0x18) {
 				pr_debug("I/O Base 0x%x fails test\n",
 					 io[b] + 0x400 * EXP_PAGE0);
 				continue;
 			}
 		}
 		else {
 			/*
 			 * Yes, probe for I/O Base
 			 */
 			if(probe_exhasted) {
 				pr_debug("All probe addresses exhasted, skipping\n");
 				continue;
 			}
 			pr_debug("Probing for I/O...\n");
 			for (i = last_base ; i <= IOBASE_MAX ; i += IOBASE_OFFSET) {
 				int found_io = 1;
 				if (i == IOBASE_MAX) {
 					probe_exhasted = 1; /* No more addresses to probe */
 					pr_debug("End of Probes\n");
 				}
 				last_base = i + IOBASE_OFFSET;
 				pr_debug("  checking 0x%x...", i);
 				for ( j = 0 ; j < MAX_IO_REGS - 1 ; j++) {
 					if(!request_region(i + j * 0x400, 1, "sc test")) {
 						pr_debug("Failed\n");
 						found_io = 0;
 						break;
 					} else
 						release_region(i + j * 0x400, 1);
 				}

 				if(found_io) {
 					io[b] = i;
 					outb(0x18, io[b] + 0x400 * EXP_PAGE0);
 					if(inb(io[b] + 0x400 * EXP_PAGE0) != 0x18) {
 						pr_debug("Failed by test\n");
 						continue;
 					}
 					pr_debug("Passed\n");
 					break;
 				}
 			}
 			if(probe_exhasted) {
 				continue;
 			}
 		}

 		/*
 		 * See if we should probe for shared RAM
 		 */
 		if(do_reset) {
 			pr_debug("Doing a SAFE probe reset\n");
 			outb(0xFF, io[b] + RESET_OFFSET);
 			msleep_interruptible(10000);
 		}
 		pr_debug("RAM Base for board %d is 0x%lx, %s probe\n", b,
 			ram[b], ram[b] == 0 ? "will" : "won't");

 		if(ram[b]) {
 			/*
 			 * No, the RAM base has been provided
 			 * Just look for a signature and ID the
 			 * board model
 			 */
 			if(request_region(ram[b], SRAM_PAGESIZE, "sc test")) {
 				pr_debug("request_region for RAM base 0x%lx succeeded\n", ram[b]);
 			 	model = identify_board(ram[b], io[b]);
 				release_region(ram[b], SRAM_PAGESIZE);
 			}
 		}
 		else {
 			/*
 			 * Yes, probe for free RAM and look for
 			 * a signature and id the board model
 			 */
 			for (i = SRAM_MIN ; i < SRAM_MAX ; i += SRAM_PAGESIZE) {
 				pr_debug("Checking RAM address 0x%x...\n", i);
 				if(request_region(i, SRAM_PAGESIZE, "sc test")) {
 					pr_debug("  request_region succeeded\n");
 					model = identify_board(i, io[b]);
 					release_region(i, SRAM_PAGESIZE);
 					if (model >= 0) {
 						pr_debug("  Identified a %s\n",
 							boardname[model]);
 						ram[b] = i;
 						break;
 					}
 					pr_debug("  Unidentifed or inaccessible\n");
 					continue;
 				}
 				pr_debug("  request failed\n");
 			}
 		}
 		/*
 		 * See if we found free RAM and the board model
 		 */
 		if(!ram[b] || model < 0) {
 			/*
 			 * Nope, there was no place in RAM for the
 			 * board, or it couldn't be identified
 			 */
 			 pr_debug("Failed to find an adapter at 0x%lx\n", ram[b]);
 			 continue;
 		}

 		/*
 		 * Set the board's magic number, memory size and page register
 		 */
 		switch(model) {
 		case PRI_BOARD:
 			channels = 23;
 			magic = 0x20000;
 			memsize = 0x100000;
 			features = PRI_FEATURES;
 			break;

 		case BRI_BOARD:
 		case POTS_BOARD:
 			channels = 2;
 			magic = 0x60000;
 			memsize = 0x10000;
 			features = BRI_FEATURES;
 			break;
 		}
 		switch(ram[b] >> 12 & 0x0F) {
 		case 0x0:
 			pr_debug("RAM Page register set to EXP_PAGE0\n");
 			pgport = EXP_PAGE0;
 			break;

 		case 0x4:
 			pr_debug("RAM Page register set to EXP_PAGE1\n");
 			pgport = EXP_PAGE1;
 			break;

 		case 0x8:
 			pr_debug("RAM Page register set to EXP_PAGE2\n");
 			pgport = EXP_PAGE2;
 			break;

 		case 0xC:
 			pr_debug("RAM Page register set to EXP_PAGE3\n");
 			pgport = EXP_PAGE3;
 			break;

 		default:
 			pr_debug("RAM base address doesn't fall on 16K boundary\n");
 			continue;
 		}

 		pr_debug("current IRQ: %d  b: %d\n",irq[b],b);

 		/*
 		 * Make sure we got an IRQ
 		 */
 		if(!irq[b]) {
 			/*
 			 * No interrupt could be used
 			 */
 			pr_debug("Failed to acquire an IRQ line\n");
 			continue;
 		}

 		/*
 		 * Horray! We found a board, Make sure we can register
 		 * it with ISDN4Linux
 		 */
 		interface = kzalloc(sizeof(isdn_if), GFP_KERNEL);
 		if (interface == NULL) {
 			/*
 			 * Oops, can't malloc isdn_if
 			 */
 			continue;
 		}

 		interface->owner = THIS_MODULE;
 		interface->hl_hdrlen = 0;
 		interface->channels = channels;
 		interface->maxbufsize = BUFFER_SIZE;
 		interface->features = features;
 		interface->writebuf_skb = sndpkt;
 		interface->writecmd = NULL;
 		interface->command = command;
 		strcpy(interface->id, devname);
 		interface->id[2] = '0' + cinst;

 		/*
 		 * Allocate the board structure
 		 */
 		sc_adapter[cinst] = kzalloc(sizeof(board), GFP_KERNEL);
 		if (sc_adapter[cinst] == NULL) {
 			/*
 			 * Oops, can't alloc memory for the board
 			 */
 			kfree(interface);
 			continue;
 		}
 		spin_lock_init(&sc_adapter[cinst]->lock);

 		if(!register_isdn(interface)) {
 			/*
 			 * Oops, couldn't register for some reason
 			 */
 			kfree(interface);
 			kfree(sc_adapter[cinst]);
 			continue;
 		}

 		sc_adapter[cinst]->card = interface;
 		sc_adapter[cinst]->driverId = interface->channels;
 		strcpy(sc_adapter[cinst]->devicename, interface->id);
 		sc_adapter[cinst]->nChannels = channels;
 		sc_adapter[cinst]->ramsize = memsize;
 		sc_adapter[cinst]->shmem_magic = magic;
 		sc_adapter[cinst]->shmem_pgport = pgport;
 		sc_adapter[cinst]->StartOnReset = 1;

 		/*
 		 * Allocate channels status structures
 		 */
 		sc_adapter[cinst]->channel = kzalloc(sizeof(bchan) * channels, GFP_KERNEL);
 		if (sc_adapter[cinst]->channel == NULL) {
 			/*
 			 * Oops, can't alloc memory for the channels
 			 */
 			indicate_status(cinst, ISDN_STAT_UNLOAD, 0, NULL);	/* Fix me */
 			kfree(interface);
 			kfree(sc_adapter[cinst]);
 			continue;
 		}

 		/*
 		 * Lock down the hardware resources
 		 */
 		sc_adapter[cinst]->interrupt = irq[b];
 		if (request_irq(sc_adapter[cinst]->interrupt, interrupt_handler,
 				IRQF_DISABLED, interface->id,
 				(void *)(unsigned long) cinst))
 		{
 			kfree(sc_adapter[cinst]->channel);
 			indicate_status(cinst, ISDN_STAT_UNLOAD, 0, NULL);	/* Fix me */
 			kfree(interface);
 			kfree(sc_adapter[cinst]);
 			continue;

 		}
 		sc_adapter[cinst]->iobase = io[b];
 		for(i = 0 ; i < MAX_IO_REGS - 1 ; i++) {
 			sc_adapter[cinst]->ioport[i] = io[b] + i * 0x400;
 			request_region(sc_adapter[cinst]->ioport[i], 1,
 					interface->id);
 			pr_debug("Requesting I/O Port %#x\n",
 				sc_adapter[cinst]->ioport[i]);
 		}
 		sc_adapter[cinst]->ioport[IRQ_SELECT] = io[b] + 0x2;
 		request_region(sc_adapter[cinst]->ioport[IRQ_SELECT], 1,
 				interface->id);
 		pr_debug("Requesting I/O Port %#x\n",
 				sc_adapter[cinst]->ioport[IRQ_SELECT]);
 		sc_adapter[cinst]->rambase = ram[b];
 		request_region(sc_adapter[cinst]->rambase, SRAM_PAGESIZE,
 				interface->id);

 		pr_info("  %s (%d) - %s %d channels IRQ %d, I/O Base 0x%x, RAM Base 0x%lx\n",
 			sc_adapter[cinst]->devicename,
 			sc_adapter[cinst]->driverId,
 			boardname[model], channels, irq[b], io[b], ram[b]);

 		/*
 		 * reset the adapter to put things in motion
 		 */
 		reset(cinst);

 		cinst++;
 		status = 0;
 	}
 	if (status)
 		pr_info("Failed to find any adapters, driver unloaded\n");
 	return status;
 }

 static void __exit sc_exit(void)
 {
 	int i, j;

 	for(i = 0 ; i < cinst ; i++) {
 		pr_debug("Cleaning up after adapter %d\n", i);
 		/*
 		 * kill the timers
 		 */
 		del_timer(&(sc_adapter[i]->reset_timer));
 		del_timer(&(sc_adapter[i]->stat_timer));

 		/*
 		 * Tell I4L we're toast
 		 */
 		indicate_status(i, ISDN_STAT_STOP, 0, NULL);
 		indicate_status(i, ISDN_STAT_UNLOAD, 0, NULL);

 		/*
 		 * Release shared RAM
 		 */
 		release_region(sc_adapter[i]->rambase, SRAM_PAGESIZE);

 		/*
 		 * Release the IRQ
 		 */
 		free_irq(sc_adapter[i]->interrupt, NULL);

 		/*
 		 * Reset for a clean start
 		 */
 		outb(0xFF, sc_adapter[i]->ioport[SFT_RESET]);

 		/*
 		 * Release the I/O Port regions
 		 */
 		for(j = 0 ; j < MAX_IO_REGS - 1; j++) {
 			release_region(sc_adapter[i]->ioport[j], 1);
 			pr_debug("Releasing I/O Port %#x\n",
 				sc_adapter[i]->ioport[j]);
 		}
 		release_region(sc_adapter[i]->ioport[IRQ_SELECT], 1);
 		pr_debug("Releasing I/O Port %#x\n",
 			sc_adapter[i]->ioport[IRQ_SELECT]);

 		/*
 		 * Release any memory we alloced
 		 */
 		kfree(sc_adapter[i]->channel);
 		kfree(sc_adapter[i]->card);
 		kfree(sc_adapter[i]);
 	}
 	pr_info("SpellCaster ISA ISDN Adapter Driver Unloaded.\n");
 }

 static int identify_board(unsigned long rambase, unsigned int iobase)
 {
 	unsigned int pgport;
 	unsigned long sig;
 	DualPortMemory *dpm;
 	RspMessage rcvmsg;
 	ReqMessage sndmsg;
 	HWConfig_pl hwci;
 	int x;

 	pr_debug("Attempting to identify adapter @ 0x%lx io 0x%x\n",
 		rambase, iobase);

 	/*
 	 * Enable the base pointer
 	 */
 	outb(rambase >> 12, iobase + 0x2c00);

 	switch(rambase >> 12 & 0x0F) {
 	case 0x0:
 		pgport = iobase + PG0_OFFSET;
 		pr_debug("Page Register offset is 0x%x\n", PG0_OFFSET);
 		break;

 	case 0x4:
 		pgport = iobase + PG1_OFFSET;
 		pr_debug("Page Register offset is 0x%x\n", PG1_OFFSET);
 		break;

 	case 0x8:
 		pgport = iobase + PG2_OFFSET;
 		pr_debug("Page Register offset is 0x%x\n", PG2_OFFSET);
 		break;

 	case 0xC:
 		pgport = iobase + PG3_OFFSET;
 		pr_debug("Page Register offset is 0x%x\n", PG3_OFFSET);
 		break;
 	default:
 		pr_debug("Invalid rambase 0x%lx\n", rambase);
 		return -1;
 	}

 	/*
 	 * Try to identify a PRI card
 	 */
 	outb(PRI_BASEPG_VAL, pgport);
 	msleep_interruptible(1000);
 	sig = readl(rambase + SIG_OFFSET);
 	pr_debug("Looking for a signature, got 0x%lx\n", sig);
 	if(sig == SIGNATURE)
 		return PRI_BOARD;

 	/*
 	 * Try to identify a PRI card
 	 */
 	outb(BRI_BASEPG_VAL, pgport);
 	msleep_interruptible(1000);
 	sig = readl(rambase + SIG_OFFSET);
 	pr_debug("Looking for a signature, got 0x%lx\n", sig);
 	if(sig == SIGNATURE)
 		return BRI_BOARD;

 	return -1;

 	/*
 	 * Try to spot a card
 	 */
 	sig = readl(rambase + SIG_OFFSET);
 	pr_debug("Looking for a signature, got 0x%lx\n", sig);
 	if(sig != SIGNATURE)
 		return -1;

 	dpm = (DualPortMemory *) rambase;

 	memset(&sndmsg, 0, MSG_LEN);
 	sndmsg.msg_byte_cnt = 3;
 	sndmsg.type = cmReqType1;
 	sndmsg.class = cmReqClass0;
 	sndmsg.code = cmReqHWConfig;
 	memcpy_toio(&(dpm->req_queue[dpm->req_head++]), &sndmsg, MSG_LEN);
 	outb(0, iobase + 0x400);
 	pr_debug("Sent HWConfig message\n");
 	/*
 	 * Wait for the response
 	 */
 	x = 0;
 	while((inb(iobase + FIFOSTAT_OFFSET) & RF_HAS_DATA) && x < 100) {
 		schedule_timeout_interruptible(1);
 		x++;
 	}
 	if(x == 100) {
 		pr_debug("Timeout waiting for response\n");
 		return -1;
 	}

 	memcpy_fromio(&rcvmsg, &(dpm->rsp_queue[dpm->rsp_tail]), MSG_LEN);
 	pr_debug("Got HWConfig response, status = 0x%x\n", rcvmsg.rsp_status);
 	memcpy(&hwci, &(rcvmsg.msg_data.HWCresponse), sizeof(HWConfig_pl));
 	pr_debug("Hardware Config: Interface: %s, RAM Size: %ld, Serial: %s\n"
 		 "                 Part: %s, Rev: %s\n",
 		 hwci.st_u_sense ? "S/T" : "U", hwci.ram_size,
 		 hwci.serial_no, hwci.part_no, hwci.rev_no);

 	if(!strncmp(PRI_PARTNO, hwci.part_no, 6))
 		return PRI_BOARD;
 	if(!strncmp(BRI_PARTNO, hwci.part_no, 6))
 		return BRI_BOARD;

 	return -1;
 }

 module_init(sc_init);
 module_exit(sc_exit);
	/*
	* This software may be used and distributed according to the terms
	* of the GNU General Public License, incorporated herein by reference.
	*
	*/

	#include <linux/module.h>
	#include <linux/init.h>
	#include <linux/interrupt.h>
	#include <linux/delay.h>
	#include "includes.h"
	#include "hardware.h"
	#include "card.h"

	MODULE_DESCRIPTION("ISDN4Linux: Driver for Spellcaster card");
	MODULE_AUTHOR("Spellcaster Telecommunications Inc.");
	MODULE_LICENSE("GPL");

	board *sc_adapter[MAX_CARDS];
	int cinst;

	static char devname[] = "scX";
	static const char version[] = "2.0b1";

	static const char *boardname[] = { "DataCommute/BRI", "DataCommute/PRI", "TeleCommute/BRI" };

	/* insmod set parameters */
	static unsigned int io[] = {0,0,0,0};
	static unsigned char irq[] = {0,0,0,0};
	static unsigned long ram[] = {0,0,0,0};
	static int do_reset = 0;

	module_param_array(io, int, NULL, 0);
	module_param_array(irq, int, NULL, 0);
	module_param_array(ram, int, NULL, 0);
	module_param(do_reset, bool, 0);

	static int identify_board(unsigned long, unsigned int);

	static int __init sc_init(void)
	{
	int b = -1;
	int i, j;
	int status = -ENODEV;

	unsigned long memsize = 0;
	unsigned long features = 0;
	isdn_if *interface;
	unsigned char channels;
	unsigned char pgport;
	unsigned long magic;
	int model;
	int last_base = IOBASE_MIN;
	int probe_exhasted = 0;

	#ifdef MODULE
	pr_info("SpellCaster ISA ISDN Adapter Driver rev. %s Loaded\n", version);
	#else
	pr_info("SpellCaster ISA ISDN Adapter Driver rev. %s\n", version);
	#endif
	pr_info("Copyright (C) 1996 SpellCaster Telecommunications Inc.\n");

	while(b++ < MAX_CARDS - 1) {
	pr_debug("Probing for adapter #%d\n", b);
	/*
	* Initialize reusable variables
	*/
	model = -1;
	magic = 0;
	channels = 0;
	pgport = 0;

	/*
	* See if we should probe for IO base
	*/
	pr_debug("I/O Base for board %d is 0x%x, %s probe\n", b, io[b],
	io[b] == 0 ? "will" : "won't");
	if(io[b]) {
	/*
	* No, I/O Base has been provided
	*/
	for (i = 0 ; i < MAX_IO_REGS - 1 ; i++) {
	if(!request_region(io[b] + i * 0x400, 1, "sc test")) {
	pr_debug("request_region for 0x%x failed\n", io[b] + i * 0x400);
	io[b] = 0;
	break;
	} else
	release_region(io[b] + i * 0x400, 1);
	}

	/*
	* Confirm the I/O Address with a test
	*/
	if(io[b] == 0) {
	pr_debug("I/O Address invalid.\n");
	continue;
	}

	outb(0x18, io[b] + 0x400 * EXP_PAGE0);
	if(inb(io[b] + 0x400 * EXP_PAGE0) != 0x18) {
	pr_debug("I/O Base 0x%x fails test\n",
	io[b] + 0x400 * EXP_PAGE0);
	continue;
	}
	}
	else {
	/*
	* Yes, probe for I/O Base
	*/
	if(probe_exhasted) {
	pr_debug("All probe addresses exhasted, skipping\n");
	continue;
	}
	pr_debug("Probing for I/O...\n");
	for (i = last_base ; i <= IOBASE_MAX ; i += IOBASE_OFFSET) {
	int found_io = 1;
	if (i == IOBASE_MAX) {
	probe_exhasted = 1; /* No more addresses to probe */
	pr_debug("End of Probes\n");
	}
	last_base = i + IOBASE_OFFSET;
	pr_debug(" checking 0x%x...", i);
	for ( j = 0 ; j < MAX_IO_REGS - 1 ; j++) {
	if(!request_region(i + j * 0x400, 1, "sc test")) {
	pr_debug("Failed\n");
	found_io = 0;
	break;
	} else
	release_region(i + j * 0x400, 1);
	}

	if(found_io) {
	io[b] = i;
	outb(0x18, io[b] + 0x400 * EXP_PAGE0);
	if(inb(io[b] + 0x400 * EXP_PAGE0) != 0x18) {
	pr_debug("Failed by test\n");
	continue;
	}
	pr_debug("Passed\n");
	break;
	}
	}
	if(probe_exhasted) {
	continue;
	}
	}

	/*
	* See if we should probe for shared RAM
	*/
	if(do_reset) {
	pr_debug("Doing a SAFE probe reset\n");
	outb(0xFF, io[b] + RESET_OFFSET);
	msleep_interruptible(10000);
	}
	pr_debug("RAM Base for board %d is 0x%lx, %s probe\n", b,
	ram[b], ram[b] == 0 ? "will" : "won't");

	if(ram[b]) {
	/*
	* No, the RAM base has been provided
	* Just look for a signature and ID the
	* board model
	*/
	if(request_region(ram[b], SRAM_PAGESIZE, "sc test")) {
	pr_debug("request_region for RAM base 0x%lx succeeded\n", ram[b]);
	model = identify_board(ram[b], io[b]);
	release_region(ram[b], SRAM_PAGESIZE);
	}
	}
	else {
	/*
	* Yes, probe for free RAM and look for
	* a signature and id the board model
	*/
	for (i = SRAM_MIN ; i < SRAM_MAX ; i += SRAM_PAGESIZE) {
	pr_debug("Checking RAM address 0x%x...\n", i);
	if(request_region(i, SRAM_PAGESIZE, "sc test")) {
	pr_debug(" request_region succeeded\n");
	model = identify_board(i, io[b]);
	release_region(i, SRAM_PAGESIZE);
	if (model >= 0) {
	pr_debug(" Identified a %s\n",
	boardname[model]);
	ram[b] = i;
	break;
	}
	pr_debug(" Unidentifed or inaccessible\n");
	continue;
	}
	pr_debug(" request failed\n");
	}
	}
	/*
	* See if we found free RAM and the board model
	*/
	if(!ram[b] \|\| model < 0) {
	/*
	* Nope, there was no place in RAM for the
	* board, or it couldn't be identified
	*/
	pr_debug("Failed to find an adapter at 0x%lx\n", ram[b]);
	continue;
	}

	/*
	* Set the board's magic number, memory size and page register
	*/
	switch(model) {
	case PRI_BOARD:
	channels = 23;
	magic = 0x20000;
	memsize = 0x100000;
	features = PRI_FEATURES;
	break;

	case BRI_BOARD:
	case POTS_BOARD:
	channels = 2;
	magic = 0x60000;
	memsize = 0x10000;
	features = BRI_FEATURES;
	break;
	}
	switch(ram[b] >> 12 & 0x0F) {
	case 0x0:
	pr_debug("RAM Page register set to EXP_PAGE0\n");
	pgport = EXP_PAGE0;
	break;

	case 0x4:
	pr_debug("RAM Page register set to EXP_PAGE1\n");
	pgport = EXP_PAGE1;
	break;

	case 0x8:
	pr_debug("RAM Page register set to EXP_PAGE2\n");
	pgport = EXP_PAGE2;
	break;

	case 0xC:
	pr_debug("RAM Page register set to EXP_PAGE3\n");
	pgport = EXP_PAGE3;
	break;

	default:
	pr_debug("RAM base address doesn't fall on 16K boundary\n");
	continue;
	}

	pr_debug("current IRQ: %d b: %d\n",irq[b],b);

	/*
	* Make sure we got an IRQ
	*/
	if(!irq[b]) {
	/*
	* No interrupt could be used
	*/
	pr_debug("Failed to acquire an IRQ line\n");
	continue;
	}

	/*
	* Horray! We found a board, Make sure we can register
	* it with ISDN4Linux
	*/
	interface = kzalloc(sizeof(isdn_if), GFP_KERNEL);
	if (interface == NULL) {
	/*
	* Oops, can't malloc isdn_if
	*/
	continue;
	}

	interface->owner = THIS_MODULE;
	interface->hl_hdrlen = 0;
	interface->channels = channels;
	interface->maxbufsize = BUFFER_SIZE;
	interface->features = features;
	interface->writebuf_skb = sndpkt;
	interface->writecmd = NULL;
	interface->command = command;
	strcpy(interface->id, devname);
	interface->id[2] = '0' + cinst;

	/*
	* Allocate the board structure
	*/
	sc_adapter[cinst] = kzalloc(sizeof(board), GFP_KERNEL);
	if (sc_adapter[cinst] == NULL) {
	/*
	* Oops, can't alloc memory for the board
	*/
	kfree(interface);
	continue;
	}
	spin_lock_init(&sc_adapter[cinst]->lock);

	if(!register_isdn(interface)) {
	/*
	* Oops, couldn't register for some reason
	*/
	kfree(interface);
	kfree(sc_adapter[cinst]);
	continue;
	}

	sc_adapter[cinst]->card = interface;
	sc_adapter[cinst]->driverId = interface->channels;
	strcpy(sc_adapter[cinst]->devicename, interface->id);
	sc_adapter[cinst]->nChannels = channels;
	sc_adapter[cinst]->ramsize = memsize;
	sc_adapter[cinst]->shmem_magic = magic;
	sc_adapter[cinst]->shmem_pgport = pgport;
	sc_adapter[cinst]->StartOnReset = 1;

	/*
	* Allocate channels status structures
	*/
	sc_adapter[cinst]->channel = kzalloc(sizeof(bchan) * channels, GFP_KERNEL);
	if (sc_adapter[cinst]->channel == NULL) {
	/*
	* Oops, can't alloc memory for the channels
	*/
	indicate_status(cinst, ISDN_STAT_UNLOAD, 0, NULL); /* Fix me */
	kfree(interface);
	kfree(sc_adapter[cinst]);
	continue;
	}

	/*
	* Lock down the hardware resources
	*/
	sc_adapter[cinst]->interrupt = irq[b];
	if (request_irq(sc_adapter[cinst]->interrupt, interrupt_handler,
	IRQF_DISABLED, interface->id,
	(void *)(unsigned long) cinst))
	{
	kfree(sc_adapter[cinst]->channel);
	indicate_status(cinst, ISDN_STAT_UNLOAD, 0, NULL); /* Fix me */
	kfree(interface);
	kfree(sc_adapter[cinst]);
	continue;

	}
	sc_adapter[cinst]->iobase = io[b];
	for(i = 0 ; i < MAX_IO_REGS - 1 ; i++) {
	sc_adapter[cinst]->ioport[i] = io[b] + i * 0x400;
	request_region(sc_adapter[cinst]->ioport[i], 1,
	interface->id);
	pr_debug("Requesting I/O Port %#x\n",
	sc_adapter[cinst]->ioport[i]);
	}
	sc_adapter[cinst]->ioport[IRQ_SELECT] = io[b] + 0x2;
	request_region(sc_adapter[cinst]->ioport[IRQ_SELECT], 1,
	interface->id);
	pr_debug("Requesting I/O Port %#x\n",
	sc_adapter[cinst]->ioport[IRQ_SELECT]);
	sc_adapter[cinst]->rambase = ram[b];
	request_region(sc_adapter[cinst]->rambase, SRAM_PAGESIZE,
	interface->id);

	pr_info(" %s (%d) - %s %d channels IRQ %d, I/O Base 0x%x, RAM Base 0x%lx\n",
	sc_adapter[cinst]->devicename,
	sc_adapter[cinst]->driverId,
	boardname[model], channels, irq[b], io[b], ram[b]);

	/*
	* reset the adapter to put things in motion
	*/
	reset(cinst);

	cinst++;
	status = 0;
	}
	if (status)
	pr_info("Failed to find any adapters, driver unloaded\n");
	return status;
	}

	static void __exit sc_exit(void)
	{
	int i, j;

	for(i = 0 ; i < cinst ; i++) {
	pr_debug("Cleaning up after adapter %d\n", i);
	/*
	* kill the timers
	*/
	del_timer(&(sc_adapter[i]->reset_timer));
	del_timer(&(sc_adapter[i]->stat_timer));

	/*
	* Tell I4L we're toast
	*/
	indicate_status(i, ISDN_STAT_STOP, 0, NULL);
	indicate_status(i, ISDN_STAT_UNLOAD, 0, NULL);

	/*
	* Release shared RAM
	*/
	release_region(sc_adapter[i]->rambase, SRAM_PAGESIZE);

	/*
	* Release the IRQ
	*/
	free_irq(sc_adapter[i]->interrupt, NULL);

	/*
	* Reset for a clean start
	*/
	outb(0xFF, sc_adapter[i]->ioport[SFT_RESET]);

	/*
	* Release the I/O Port regions
	*/
	for(j = 0 ; j < MAX_IO_REGS - 1; j++) {
	release_region(sc_adapter[i]->ioport[j], 1);
	pr_debug("Releasing I/O Port %#x\n",
	sc_adapter[i]->ioport[j]);
	}
	release_region(sc_adapter[i]->ioport[IRQ_SELECT], 1);
	pr_debug("Releasing I/O Port %#x\n",
	sc_adapter[i]->ioport[IRQ_SELECT]);

	/*
	* Release any memory we alloced
	*/
	kfree(sc_adapter[i]->channel);
	kfree(sc_adapter[i]->card);
	kfree(sc_adapter[i]);
	}
	pr_info("SpellCaster ISA ISDN Adapter Driver Unloaded.\n");
	}

	static int identify_board(unsigned long rambase, unsigned int iobase)
	{
	unsigned int pgport;
	unsigned long sig;
	DualPortMemory *dpm;
	RspMessage rcvmsg;
	ReqMessage sndmsg;
	HWConfig_pl hwci;
	int x;

	pr_debug("Attempting to identify adapter @ 0x%lx io 0x%x\n",
	rambase, iobase);

	/*
	* Enable the base pointer
	*/
	outb(rambase >> 12, iobase + 0x2c00);

	switch(rambase >> 12 & 0x0F) {
	case 0x0:
	pgport = iobase + PG0_OFFSET;
	pr_debug("Page Register offset is 0x%x\n", PG0_OFFSET);
	break;

	case 0x4:
	pgport = iobase + PG1_OFFSET;
	pr_debug("Page Register offset is 0x%x\n", PG1_OFFSET);
	break;

	case 0x8:
	pgport = iobase + PG2_OFFSET;
	pr_debug("Page Register offset is 0x%x\n", PG2_OFFSET);
	break;

	case 0xC:
	pgport = iobase + PG3_OFFSET;
	pr_debug("Page Register offset is 0x%x\n", PG3_OFFSET);
	break;
	default:
	pr_debug("Invalid rambase 0x%lx\n", rambase);
	return -1;
	}

	/*
	* Try to identify a PRI card
	*/
	outb(PRI_BASEPG_VAL, pgport);
	msleep_interruptible(1000);
	sig = readl(rambase + SIG_OFFSET);
	pr_debug("Looking for a signature, got 0x%lx\n", sig);
	if(sig == SIGNATURE)
	return PRI_BOARD;

	/*
	* Try to identify a PRI card
	*/
	outb(BRI_BASEPG_VAL, pgport);
	msleep_interruptible(1000);
	sig = readl(rambase + SIG_OFFSET);
	pr_debug("Looking for a signature, got 0x%lx\n", sig);
	if(sig == SIGNATURE)
	return BRI_BOARD;

	return -1;

	/*
	* Try to spot a card
	*/
	sig = readl(rambase + SIG_OFFSET);
	pr_debug("Looking for a signature, got 0x%lx\n", sig);
	if(sig != SIGNATURE)
	return -1;

	dpm = (DualPortMemory *) rambase;

	memset(&sndmsg, 0, MSG_LEN);
	sndmsg.msg_byte_cnt = 3;
	sndmsg.type = cmReqType1;
	sndmsg.class = cmReqClass0;
	sndmsg.code = cmReqHWConfig;
	memcpy_toio(&(dpm->req_queue[dpm->req_head++]), &sndmsg, MSG_LEN);
	outb(0, iobase + 0x400);
	pr_debug("Sent HWConfig message\n");
	/*
	* Wait for the response
	*/
	x = 0;
	while((inb(iobase + FIFOSTAT_OFFSET) & RF_HAS_DATA) && x < 100) {
	schedule_timeout_interruptible(1);
	x++;
	}
	if(x == 100) {
	pr_debug("Timeout waiting for response\n");
	return -1;
	}

	memcpy_fromio(&rcvmsg, &(dpm->rsp_queue[dpm->rsp_tail]), MSG_LEN);
	pr_debug("Got HWConfig response, status = 0x%x\n", rcvmsg.rsp_status);
	memcpy(&hwci, &(rcvmsg.msg_data.HWCresponse), sizeof(HWConfig_pl));
	pr_debug("Hardware Config: Interface: %s, RAM Size: %ld, Serial: %s\n"
	" Part: %s, Rev: %s\n",
	hwci.st_u_sense ? "S/T" : "U", hwci.ram_size,
	hwci.serial_no, hwci.part_no, hwci.rev_no);

	if(!strncmp(PRI_PARTNO, hwci.part_no, 6))
	return PRI_BOARD;
	if(!strncmp(BRI_PARTNO, hwci.part_no, 6))
	return BRI_BOARD;

	return -1;
	}

	module_init(sc_init);
	module_exit(sc_exit);