init.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:14k
- /*
- * 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 "includes.h"
- #include "hardware.h"
- #include "card.h"
- MODULE_DESCRIPTION("ISDN4Linux: Driver for Spellcaster card");
- MODULE_AUTHOR("Spellcaster Telecommunications Inc.");
- MODULE_LICENSE("GPL");
- MODULE_PARM( io, "1-" __MODULE_STRING(MAX_CARDS) "i");
- MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_CARDS) "i");
- MODULE_PARM(ram, "1-" __MODULE_STRING(MAX_CARDS) "i");
- MODULE_PARM(do_reset, "i");
- 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 */
- 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;
- 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, 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 Loadedn", version);
- #else
- pr_info("SpellCaster ISA ISDN Adapter Driver rev. %sn", version);
- #endif
- pr_info("Copyright (C) 1996 SpellCaster Telecommunications Inc.n");
- while(b++ < MAX_CARDS - 1) {
- pr_debug("Probing for adapter #%dn", 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 proben", 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 failedn", 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 testn");
- continue;
- }
- }
- else {
- /*
- * Yes, probe for I/O Base
- */
- if(probe_exhasted) {
- pr_debug("All probe addresses exhasted, skippingn");
- 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 Probesn");
- }
- 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("Failedn");
- 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 testn");
- continue;
- }
- pr_debug("Passedn");
- break;
- }
- }
- if(probe_exhasted) {
- continue;
- }
- }
- /*
- * See if we should probe for shared RAM
- */
- if(do_reset) {
- pr_debug("Doing a SAFE probe resetn");
- outb(0xFF, io[b] + RESET_OFFSET);
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout(milliseconds(10000));
- }
- pr_debug("RAM Base for board %d is 0x%x, %s proben", 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 succeededn", 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 succeededn");
- model = identify_board(i, io[b]);
- if (model >= 0) {
- pr_debug(" Identified a %sn",
- boardname[model]);
- ram[b] = i;
- break;
- }
- pr_debug(" Unidentifed or inaccessiblen");
- continue;
- }
- pr_debug(" check_region failedn");
- }
- }
- /*
- * 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%xn", 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_PAGE0n");
- pgport = EXP_PAGE0;
- break;
- case 0x4:
- pr_debug("RAM Page register set to EXP_PAGE1n");
- pgport = EXP_PAGE1;
- break;
- case 0x8:
- pr_debug("RAM Page register set to EXP_PAGE2n");
- pgport = EXP_PAGE2;
- break;
- case 0xC:
- pr_debug("RAM Page register set to EXP_PAGE3n");
- pgport = EXP_PAGE3;
- break;
- default:
- pr_debug("RAM base address doesn't fall on 16K boundaryn");
- continue;
- }
- pr_debug("current IRQ: %d b: %dn",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: %dn",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 usen",
- 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 %dn", 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 acquire an IRQ linen");
- 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 %#xn", 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 %#xn", 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%lxn",
- 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 unloadedn");
- return status;
- }
- static void __exit sc_exit(void)
- {
- int i, j;
- for(i = 0 ; i < cinst ; i++) {
- pr_debug("Cleaning up after adapter %dn", 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 %#xn", adapter[i]->ioport[j]);
- }
- release_region(adapter[i]->ioport[IRQ_SELECT], 1);
- pr_debug("Releasing I/O Port %#xn", 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");
- }
- 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%xn",
- 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%xn", PG0_OFFSET);
- break;
-
- case 0x4:
- pgport = iobase + PG1_OFFSET;
- pr_debug("Page Register offset is 0x%xn", PG1_OFFSET);
- break;
- case 0x8:
- pgport = iobase + PG2_OFFSET;
- pr_debug("Page Register offset is 0x%xn", PG2_OFFSET);
- break;
- case 0xC:
- pgport = iobase + PG3_OFFSET;
- pr_debug("Page Register offset is 0x%xn", PG3_OFFSET);
- break;
- default:
- pr_debug("Invalid rambase 0x%lxn", rambase);
- return -1;
- }
- /*
- * Try to identify a PRI card
- */
- outb(PRI_BASEPG_VAL, pgport);
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout(HZ);
- sig = readl(rambase + SIG_OFFSET);
- pr_debug("Looking for a signature, got 0x%xn", sig);
- if(sig == SIGNATURE)
- return PRI_BOARD;
- /*
- * Try to identify a PRI card
- */
- outb(BRI_BASEPG_VAL, pgport);
- set_current_state(TASK_INTERRUPTIBLE);
- schedule_timeout(HZ);
- sig = readl(rambase + SIG_OFFSET);
- pr_debug("Looking for a signature, got 0x%xn", 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%xn", 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 messagen");
- /*
- * 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 responsen");
- return -1;
- }
- memcpy_fromio(&rcvmsg, &(dpm->rsp_queue[dpm->rsp_tail]), MSG_LEN);
- pr_debug("Got HWConfig response, status = 0x%xn", rcvmsg.rsp_status);
- memcpy(&hwci, &(rcvmsg.msg_data.HWCresponse), sizeof(HWConfig_pl));
- pr_debug("Hardware Config: Interface: %s, RAM Size: %d, Serial: %sn"
- " Part: %s, Rev: %sn",
- 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);