572 lines
14 KiB
C
572 lines
14 KiB
C
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/*
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* This software may be used and distributed according to the terms
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* of the GNU General Public License, incorporated herein by reference.
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*
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include "includes.h"
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#include "hardware.h"
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#include "card.h"
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MODULE_DESCRIPTION("ISDN4Linux: Driver for Spellcaster card");
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MODULE_AUTHOR("Spellcaster Telecommunications Inc.");
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MODULE_LICENSE("GPL");
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board *sc_adapter[MAX_CARDS];
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int cinst;
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static char devname[] = "scX";
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const char version[] = "2.0b1";
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const char *boardname[] = { "DataCommute/BRI", "DataCommute/PRI", "TeleCommute/BRI" };
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/* insmod set parameters */
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static unsigned int io[] = {0,0,0,0};
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static unsigned char irq[] = {0,0,0,0};
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static unsigned long ram[] = {0,0,0,0};
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static int do_reset = 0;
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module_param_array(io, int, NULL, 0);
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module_param_array(irq, int, NULL, 0);
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module_param_array(ram, int, NULL, 0);
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module_param(do_reset, bool, 0);
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static int sup_irq[] = { 11, 10, 9, 5, 12, 14, 7, 3, 4, 6 };
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#define MAX_IRQS 10
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extern irqreturn_t interrupt_handler(int, void *, struct pt_regs *);
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extern int sndpkt(int, int, int, struct sk_buff *);
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extern int command(isdn_ctrl *);
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extern int indicate_status(int, int, ulong, char*);
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extern int reset(int);
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int identify_board(unsigned long, unsigned int);
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int irq_supported(int irq_x)
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{
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int i;
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for(i=0 ; i < MAX_IRQS ; i++) {
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if(sup_irq[i] == irq_x)
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return 1;
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}
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return 0;
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}
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static int __init sc_init(void)
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{
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int b = -1;
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int i, j;
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int status = -ENODEV;
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unsigned long memsize = 0;
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unsigned long features = 0;
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isdn_if *interface;
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unsigned char channels;
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unsigned char pgport;
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unsigned long magic;
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int model;
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int last_base = IOBASE_MIN;
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int probe_exhasted = 0;
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#ifdef MODULE
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pr_info("SpellCaster ISA ISDN Adapter Driver rev. %s Loaded\n", version);
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#else
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pr_info("SpellCaster ISA ISDN Adapter Driver rev. %s\n", version);
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#endif
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pr_info("Copyright (C) 1996 SpellCaster Telecommunications Inc.\n");
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while(b++ < MAX_CARDS - 1) {
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pr_debug("Probing for adapter #%d\n", b);
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/*
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* Initialize reusable variables
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*/
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model = -1;
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magic = 0;
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channels = 0;
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pgport = 0;
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/*
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* See if we should probe for IO base
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*/
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pr_debug("I/O Base for board %d is 0x%x, %s probe\n", b, io[b],
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io[b] == 0 ? "will" : "won't");
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if(io[b]) {
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/*
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* No, I/O Base has been provided
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*/
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for (i = 0 ; i < MAX_IO_REGS - 1 ; i++) {
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if(!request_region(io[b] + i * 0x400, 1, "sc test")) {
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pr_debug("check_region for 0x%x failed\n", io[b] + i * 0x400);
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io[b] = 0;
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break;
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} else
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release_region(io[b] + i * 0x400, 1);
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}
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/*
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* Confirm the I/O Address with a test
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*/
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if(io[b] == 0) {
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pr_debug("I/O Address 0x%x is in use.\n");
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continue;
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}
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outb(0x18, io[b] + 0x400 * EXP_PAGE0);
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if(inb(io[b] + 0x400 * EXP_PAGE0) != 0x18) {
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pr_debug("I/O Base 0x%x fails test\n");
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continue;
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}
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}
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else {
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/*
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* Yes, probe for I/O Base
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*/
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if(probe_exhasted) {
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pr_debug("All probe addresses exhasted, skipping\n");
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continue;
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}
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pr_debug("Probing for I/O...\n");
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for (i = last_base ; i <= IOBASE_MAX ; i += IOBASE_OFFSET) {
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int found_io = 1;
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if (i == IOBASE_MAX) {
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probe_exhasted = 1; /* No more addresses to probe */
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pr_debug("End of Probes\n");
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}
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last_base = i + IOBASE_OFFSET;
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pr_debug(" checking 0x%x...", i);
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for ( j = 0 ; j < MAX_IO_REGS - 1 ; j++) {
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if(!request_region(i + j * 0x400, 1, "sc test")) {
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pr_debug("Failed\n");
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found_io = 0;
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break;
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} else
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release_region(i + j * 0x400, 1);
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}
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if(found_io) {
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io[b] = i;
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outb(0x18, io[b] + 0x400 * EXP_PAGE0);
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if(inb(io[b] + 0x400 * EXP_PAGE0) != 0x18) {
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pr_debug("Failed by test\n");
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continue;
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}
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pr_debug("Passed\n");
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break;
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}
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}
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if(probe_exhasted) {
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continue;
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}
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}
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/*
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* See if we should probe for shared RAM
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*/
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if(do_reset) {
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pr_debug("Doing a SAFE probe reset\n");
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outb(0xFF, io[b] + RESET_OFFSET);
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msleep_interruptible(10000);
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}
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pr_debug("RAM Base for board %d is 0x%x, %s probe\n", b, ram[b],
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ram[b] == 0 ? "will" : "won't");
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if(ram[b]) {
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/*
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* No, the RAM base has been provided
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* Just look for a signature and ID the
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* board model
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*/
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if(request_region(ram[b], SRAM_PAGESIZE, "sc test")) {
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pr_debug("request_region for RAM base 0x%x succeeded\n", ram[b]);
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model = identify_board(ram[b], io[b]);
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release_region(ram[b], SRAM_PAGESIZE);
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}
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}
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else {
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/*
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* Yes, probe for free RAM and look for
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* a signature and id the board model
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*/
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for (i = SRAM_MIN ; i < SRAM_MAX ; i += SRAM_PAGESIZE) {
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pr_debug("Checking RAM address 0x%x...\n", i);
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if(request_region(i, SRAM_PAGESIZE, "sc test")) {
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pr_debug(" check_region succeeded\n");
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model = identify_board(i, io[b]);
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release_region(i, SRAM_PAGESIZE);
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if (model >= 0) {
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pr_debug(" Identified a %s\n",
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boardname[model]);
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ram[b] = i;
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break;
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}
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pr_debug(" Unidentifed or inaccessible\n");
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continue;
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}
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pr_debug(" request failed\n");
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}
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}
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/*
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* See if we found free RAM and the board model
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*/
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if(!ram[b] || model < 0) {
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/*
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* Nope, there was no place in RAM for the
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* board, or it couldn't be identified
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*/
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pr_debug("Failed to find an adapter at 0x%x\n", ram[b]);
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continue;
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}
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/*
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* Set the board's magic number, memory size and page register
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*/
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switch(model) {
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case PRI_BOARD:
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channels = 23;
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magic = 0x20000;
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memsize = 0x100000;
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features = PRI_FEATURES;
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break;
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case BRI_BOARD:
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case POTS_BOARD:
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channels = 2;
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magic = 0x60000;
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memsize = 0x10000;
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features = BRI_FEATURES;
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break;
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}
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switch(ram[b] >> 12 & 0x0F) {
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case 0x0:
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pr_debug("RAM Page register set to EXP_PAGE0\n");
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pgport = EXP_PAGE0;
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break;
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case 0x4:
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pr_debug("RAM Page register set to EXP_PAGE1\n");
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pgport = EXP_PAGE1;
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break;
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case 0x8:
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pr_debug("RAM Page register set to EXP_PAGE2\n");
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pgport = EXP_PAGE2;
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break;
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case 0xC:
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pr_debug("RAM Page register set to EXP_PAGE3\n");
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pgport = EXP_PAGE3;
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break;
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default:
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pr_debug("RAM base address doesn't fall on 16K boundary\n");
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continue;
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}
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pr_debug("current IRQ: %d b: %d\n",irq[b],b);
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/*
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* Make sure we got an IRQ
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*/
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if(!irq[b]) {
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/*
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* No interrupt could be used
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*/
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pr_debug("Failed to acquire an IRQ line\n");
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continue;
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}
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/*
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* Horray! We found a board, Make sure we can register
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* it with ISDN4Linux
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*/
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interface = kmalloc(sizeof(isdn_if), GFP_KERNEL);
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if (interface == NULL) {
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/*
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* Oops, can't malloc isdn_if
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*/
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continue;
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}
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memset(interface, 0, sizeof(isdn_if));
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interface->owner = THIS_MODULE;
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interface->hl_hdrlen = 0;
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interface->channels = channels;
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interface->maxbufsize = BUFFER_SIZE;
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interface->features = features;
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interface->writebuf_skb = sndpkt;
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interface->writecmd = NULL;
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interface->command = command;
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strcpy(interface->id, devname);
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interface->id[2] = '0' + cinst;
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/*
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* Allocate the board structure
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*/
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sc_adapter[cinst] = kmalloc(sizeof(board), GFP_KERNEL);
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if (sc_adapter[cinst] == NULL) {
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/*
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* Oops, can't alloc memory for the board
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*/
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kfree(interface);
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continue;
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}
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memset(sc_adapter[cinst], 0, sizeof(board));
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spin_lock_init(&sc_adapter[cinst]->lock);
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if(!register_isdn(interface)) {
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/*
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* Oops, couldn't register for some reason
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*/
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kfree(interface);
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kfree(sc_adapter[cinst]);
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continue;
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}
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sc_adapter[cinst]->card = interface;
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sc_adapter[cinst]->driverId = interface->channels;
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strcpy(sc_adapter[cinst]->devicename, interface->id);
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sc_adapter[cinst]->nChannels = channels;
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sc_adapter[cinst]->ramsize = memsize;
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sc_adapter[cinst]->shmem_magic = magic;
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sc_adapter[cinst]->shmem_pgport = pgport;
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sc_adapter[cinst]->StartOnReset = 1;
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/*
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* Allocate channels status structures
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*/
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sc_adapter[cinst]->channel = kmalloc(sizeof(bchan) * channels, GFP_KERNEL);
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if (sc_adapter[cinst]->channel == NULL) {
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/*
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* Oops, can't alloc memory for the channels
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*/
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indicate_status(cinst, ISDN_STAT_UNLOAD, 0, NULL); /* Fix me */
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kfree(interface);
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kfree(sc_adapter[cinst]);
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continue;
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}
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memset(sc_adapter[cinst]->channel, 0, sizeof(bchan) * channels);
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/*
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* Lock down the hardware resources
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*/
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sc_adapter[cinst]->interrupt = irq[b];
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if (request_irq(sc_adapter[cinst]->interrupt, interrupt_handler,
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SA_INTERRUPT, interface->id, NULL))
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{
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kfree(sc_adapter[cinst]->channel);
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indicate_status(cinst, ISDN_STAT_UNLOAD, 0, NULL); /* Fix me */
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kfree(interface);
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kfree(sc_adapter[cinst]);
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continue;
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}
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sc_adapter[cinst]->iobase = io[b];
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for(i = 0 ; i < MAX_IO_REGS - 1 ; i++) {
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sc_adapter[cinst]->ioport[i] = io[b] + i * 0x400;
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request_region(sc_adapter[cinst]->ioport[i], 1,
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interface->id);
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pr_debug("Requesting I/O Port %#x\n",
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sc_adapter[cinst]->ioport[i]);
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}
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sc_adapter[cinst]->ioport[IRQ_SELECT] = io[b] + 0x2;
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request_region(sc_adapter[cinst]->ioport[IRQ_SELECT], 1,
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interface->id);
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pr_debug("Requesting I/O Port %#x\n",
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sc_adapter[cinst]->ioport[IRQ_SELECT]);
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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);
|