patch-2.1.27 linux/drivers/isdn/sc/init.c

• Lines: 600
• Date: Tue Feb 25 17:12:50 1997
• Orig file: v2.1.26/linux/drivers/isdn/sc/init.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.26/linux/drivers/isdn/sc/init.c linux/drivers/isdn/sc/init.c
@@ -0,0 +1,599 @@
+#include "includes.h"
+#include "hardware.h"
+#include "card.h"
+
+board *adapter[MAX_CARDS];
+int cinst;
+
+static char devname[] = "scX";
+const char version[] = "2.0b1";
+
+const char *boardname[] = { "DataCommute/BRI", "DataCommute/PRI", "TeleCommute/BRI" };
+
+/* insmod set parameters */
+unsigned int io[] = {0,0,0,0};
+unsigned char irq[] = {0,0,0,0};
+unsigned long ram[] = {0,0,0,0};
+int do_reset = 0;
+
+static int sup_irq[] = { 11, 10, 9, 5, 12, 14, 7, 3, 4, 6 };
+#define MAX_IRQS	10
+
+extern void interrupt_handler(int, void *, struct pt_regs *);
+extern int sndpkt(int, int, struct sk_buff *);
+extern int command(isdn_ctrl *);
+extern int indicate_status(int, int, ulong, char*);
+extern int reset(int);
+
+int identify_board(unsigned long, unsigned int);
+
+int irq_supported(int irq_x)
+{
+	int i;
+	for(i=0 ; i < MAX_IRQS ; i++) {
+		if(sup_irq[i] == irq_x)
+			return 1;
+	}
+	return 0;
+}
+
+#ifdef MODULE
+#if (LINUX_VERSION_CODE > 0x020111)
+MODULE_PARM(io, "1-4i");
+MODULE_PARM(irq, "1-4i");
+MODULE_PARM(ram, "1-4i");
+MODULE_PARM(do_reset, "i");
+#endif
+#define init_sc init_module
+#else
+/*
+Initialization code for non-module version to be included
+
+void sc_setup(char *str, int *ints)
+{
+}
+*/
+#endif
+
+int init_sc(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(check_region(io[b] + i * 0x400, 1)) {
+					pr_debug("check_region for 0x%x failed\n", io[b] + i * 0x400);
+					io[b] = 0;
+					break;
+				}
+			}
+
+			/*
+			 * Confirm the I/O Address with a test
+			 */
+			if(io[b] == 0) {
+				pr_debug("I/O Address 0x%x is in use.\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");
+				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(check_region(i + j * 0x400, 1)) {
+						pr_debug("Failed\n");
+						found_io = 0;
+						break;
+					}
+				}	
+
+				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);
+			current->state = TASK_INTERRUPTIBLE;
+			current->timeout = jiffies + milliseconds(10000);
+			schedule();
+		}
+		pr_debug("RAM Base for board %d is 0x%x, %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(!check_region(ram[b], SRAM_PAGESIZE)) {
+				pr_debug("check_region for RAM base 0x%x succeeded\n", ram[b]);
+			 	model = identify_board(ram[b], io[b]);
+			}
+		}
+		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(!check_region(i, SRAM_PAGESIZE)) {
+					pr_debug("  check_region succeeded\n");
+					model = identify_board(i, io[b]);
+					if (model >= 0) {
+						pr_debug("  Identified a %s\n",
+							boardname[model]);
+						ram[b] = i;
+						break;
+					}
+					pr_debug("  Unidentifed or inaccessible\n");
+					continue;
+				}
+				pr_debug("  check_region 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%x\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);
+		/*
+		 * See if we should probe for an irq
+		 */
+		if(irq[b]) {
+			/*
+			 * No we were given one
+			 * See that it is supported and free
+			 */
+			pr_debug("Trying for IRQ: %d\n",irq[b]);
+			if (irq_supported(irq[b])) {
+				if(REQUEST_IRQ(irq[b], interrupt_handler, 
+					SA_PROBE, "sc_probe", NULL)) {
+					pr_debug("IRQ %d is already in use\n", 
+						irq[b]);
+					continue;
+				}
+				FREE_IRQ(irq[b], NULL);
+			}
+		}
+		else {
+			/*
+			 * Yes, we need to probe for an IRQ
+			 */
+			pr_debug("Probing for IRQ...\n");
+			for (i = 0; i < MAX_IRQS ; i++) {
+				if(!REQUEST_IRQ(sup_irq[i], interrupt_handler, SA_PROBE, "sc_probe", NULL)) {
+					pr_debug("Probed for and found IRQ %d\n", sup_irq[i]);
+					FREE_IRQ(sup_irq[i], NULL);
+					irq[b] = sup_irq[i];
+					break;
+				}
+			}
+		}
+
+		/*
+		 * Make sure we got an IRQ
+		 */
+		if(!irq[b]) {
+			/*
+			 * No interrupt could be used
+			 */
+			pr_debug("Failed to aquire an IRQ line\n");
+			continue;
+		}
+
+		/*
+		 * Horray! We found a board, Make sure we can register
+		 * it with ISDN4Linux
+		 */
+		interface = kmalloc(sizeof(isdn_if), GFP_KERNEL);
+		if (interface == NULL) {
+			/*
+			 * Oops, can't malloc isdn_if
+			 */
+			continue;
+		}
+		memset(interface, 0, sizeof(isdn_if));
+
+		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
+		 */
+		adapter[cinst] = kmalloc(sizeof(board), GFP_KERNEL);
+		if (adapter[cinst] == NULL) {
+			/*
+			 * Oops, can't alloc memory for the board
+			 */
+			kfree(interface);
+			continue;
+		}
+		memset(adapter[cinst], 0, sizeof(board));
+
+		if(!register_isdn(interface)) {
+			/*
+			 * Oops, couldn't register for some reason
+			 */
+			kfree(interface);
+			kfree(adapter[cinst]);
+			continue;
+		}
+
+		adapter[cinst]->card = interface;
+		adapter[cinst]->driverId = interface->channels;
+		strcpy(adapter[cinst]->devicename, interface->id);
+		adapter[cinst]->nChannels = channels;
+		adapter[cinst]->ramsize = memsize;
+		adapter[cinst]->shmem_magic = magic;
+		adapter[cinst]->shmem_pgport = pgport;
+		adapter[cinst]->StartOnReset = 1;
+
+		/*
+		 * Allocate channels status structures
+		 */
+		adapter[cinst]->channel = kmalloc(sizeof(bchan) * channels, GFP_KERNEL);
+		if (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(adapter[cinst]);
+			continue;
+		}
+		memset(adapter[cinst]->channel, 0, sizeof(bchan) * channels);
+
+		/*
+		 * Lock down the hardware resources
+		 */
+		adapter[cinst]->interrupt = irq[b];
+		REQUEST_IRQ(adapter[cinst]->interrupt, interrupt_handler, SA_INTERRUPT, 
+			interface->id, NULL);
+		adapter[cinst]->iobase = io[b];
+		for(i = 0 ; i < MAX_IO_REGS - 1 ; i++) {
+			adapter[cinst]->ioport[i] = io[b] + i * 0x400;
+			request_region(adapter[cinst]->ioport[i], 1, interface->id);
+			pr_debug("Requesting I/O Port %#x\n", adapter[cinst]->ioport[i]);
+		}
+		adapter[cinst]->ioport[IRQ_SELECT] = io[b] + 0x2;
+		request_region(adapter[cinst]->ioport[IRQ_SELECT], 1, interface->id);
+		pr_debug("Requesting I/O Port %#x\n", adapter[cinst]->ioport[IRQ_SELECT]);
+		adapter[cinst]->rambase = ram[b];
+		request_region(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", 
+			adapter[cinst]->devicename, 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;
+}
+
+#ifdef MODULE
+void cleanup_module(void)
+{
+	int i, j;
+
+	for(i = 0 ; i < cinst ; i++) {
+		pr_debug("Cleaning up after adapter %d\n", i);
+		/*
+		 * kill the timers
+		 */
+		del_timer(&(adapter[i]->reset_timer));
+		del_timer(&(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(adapter[i]->rambase, SRAM_PAGESIZE);
+
+		/*
+		 * Release the IRQ
+		 */
+		FREE_IRQ(adapter[i]->interrupt, NULL);
+
+		/*
+		 * Reset for a clean start
+		 */
+		outb(0xFF, adapter[i]->ioport[SFT_RESET]);
+
+		/*
+		 * Release the I/O Port regions
+		 */
+		for(j = 0 ; j < MAX_IO_REGS - 1; j++) {
+			release_region(adapter[i]->ioport[j], 1);
+			pr_debug("Releasing I/O Port %#x\n", adapter[i]->ioport[j]);
+		}
+		release_region(adapter[i]->ioport[IRQ_SELECT], 1);
+		pr_debug("Releasing I/O Port %#x\n", adapter[i]->ioport[IRQ_SELECT]);
+
+		/*
+		 * Release any memory we alloced
+		 */
+		kfree(adapter[i]->channel);
+		kfree(adapter[i]->card);
+		kfree(adapter[i]);
+	}
+	pr_info("SpellCaster ISA ISDN Adapter Driver Unloaded.\n");
+}
+#endif
+
+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%x 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);
+	current->state = TASK_INTERRUPTIBLE;
+	current->timeout = jiffies + HZ;
+	schedule();
+	sig = readl(rambase + SIG_OFFSET);
+	pr_debug("Looking for a signature, got 0x%x\n", sig);
+#if 0
+/*
+ * For Gary: 
+ * If it's a timing problem, it should be gone with the above schedule()
+ * Another possible reason may be the missing volatile in the original
+ * code. readl() does this for us.
+ */
+	printk("");	/* Hack! Doesn't work without this !!!??? */
+#endif
+	if(sig == SIGNATURE)
+		return PRI_BOARD;
+
+	/*
+	 * Try to identify a PRI card
+	 */
+	outb(BRI_BASEPG_VAL, pgport);
+	current->state = TASK_INTERRUPTIBLE;
+	current->timeout = jiffies + HZ;
+	schedule();
+	sig = readl(rambase + SIG_OFFSET);
+	pr_debug("Looking for a signature, got 0x%x\n", sig);
+#if 0
+	printk("");	/* Hack! Doesn't work without this !!!??? */
+#endif
+	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%x\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) {
+		current->state = TASK_INTERRUPTIBLE;
+		current->timeout = jiffies + 1;
+		schedule();
+		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: %d, 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;
+}