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Diffstat (limited to 'drivers/isdn/sc/init.c')
-rw-r--r--drivers/isdn/sc/init.c571
1 files changed, 571 insertions, 0 deletions
diff --git a/drivers/isdn/sc/init.c b/drivers/isdn/sc/init.c
new file mode 100644
index 00000000000..efefedea37b
--- /dev/null
+++ b/drivers/isdn/sc/init.c
@@ -0,0 +1,571 @@
+/*
+ * 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";
+const char version[] = "2.0b1";
+
+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 sup_irq[] = { 11, 10, 9, 5, 12, 14, 7, 3, 4, 6 };
+#define MAX_IRQS 10
+
+extern irqreturn_t interrupt_handler(int, void *, struct pt_regs *);
+extern int sndpkt(int, 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;
+}
+
+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("check_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 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(!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%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(request_region(ram[b], SRAM_PAGESIZE, "sc test")) {
+ pr_debug("request_region for RAM base 0x%x 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(" check_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%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);
+
+ /*
+ * 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 = kmalloc(sizeof(isdn_if), GFP_KERNEL);
+ if (interface == NULL) {
+ /*
+ * Oops, can't malloc isdn_if
+ */
+ continue;
+ }
+ memset(interface, 0, sizeof(isdn_if));
+
+ 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] = kmalloc(sizeof(board), GFP_KERNEL);
+ if (sc_adapter[cinst] == NULL) {
+ /*
+ * Oops, can't alloc memory for the board
+ */
+ kfree(interface);
+ continue;
+ }
+ memset(sc_adapter[cinst], 0, sizeof(board));
+ 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 = kmalloc(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;
+ }
+ memset(sc_adapter[cinst]->channel, 0, sizeof(bchan) * channels);
+
+ /*
+ * Lock down the hardware resources
+ */
+ sc_adapter[cinst]->interrupt = irq[b];
+ if (request_irq(sc_adapter[cinst]->interrupt, interrupt_handler,
+ SA_INTERRUPT, interface->id, NULL))
+ {
+ 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");
+}
+
+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);
+ msleep_interruptible(1000);
+ sig = readl(rambase + SIG_OFFSET);
+ pr_debug("Looking for a signature, got 0x%x\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%x\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%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) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ schedule_timeout(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: %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;
+}
+
+module_init(sc_init);
+module_exit(sc_exit);
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