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/*
* tc-init: We assume the TURBOchannel to be up and running so
* just probe for Modules and fill in the global data structure
* tc_bus.
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (c) Harald Koerfgen, 1998
* Copyright (c) 2001, 2003, 2005 Maciej W. Rozycki
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/types.h>
#include <asm/addrspace.h>
#include <asm/bug.h>
#include <asm/errno.h>
#include <asm/io.h>
#include <asm/paccess.h>
#include <asm/dec/machtype.h>
#include <asm/dec/prom.h>
#include <asm/dec/tcinfo.h>
#include <asm/dec/tcmodule.h>
#include <asm/dec/interrupts.h>
MODULE_LICENSE("GPL");
slot_info tc_bus[MAX_SLOT];
static int num_tcslots;
static tcinfo *info;
/*
* Interface to the world. Read comment in include/asm-mips/tc.h.
*/
int search_tc_card(const char *name)
{
int slot;
slot_info *sip;
for (slot = 0; slot < num_tcslots; slot++) {
sip = &tc_bus[slot];
if ((sip->flags & FREE) &&
(strncmp(sip->name, name, strlen(name)) == 0)) {
return slot;
}
}
return -ENODEV;
}
void claim_tc_card(int slot)
{
if (tc_bus[slot].flags & IN_USE) {
printk("claim_tc_card: attempting to claim a card already in use\n");
return;
}
tc_bus[slot].flags &= ~FREE;
tc_bus[slot].flags |= IN_USE;
}
void release_tc_card(int slot)
{
if (tc_bus[slot].flags & FREE) {
printk("release_tc_card: "
"attempting to release a card already free\n");
return;
}
tc_bus[slot].flags &= ~IN_USE;
tc_bus[slot].flags |= FREE;
}
unsigned long get_tc_base_addr(int slot)
{
return tc_bus[slot].base_addr;
}
unsigned long get_tc_irq_nr(int slot)
{
return tc_bus[slot].interrupt;
}
unsigned long get_tc_speed(void)
{
return 100000 * (10000 / (unsigned long)info->clk_period);
}
/*
* Probing for TURBOchannel modules
*/
static void __init tc_probe(unsigned long startaddr, unsigned long size,
int slots)
{
unsigned long slotaddr;
int i, slot, err;
long offset;
u8 pattern[4];
volatile u8 *module;
for (slot = 0; slot < slots; slot++) {
slotaddr = startaddr + slot * size;
module = ioremap_nocache(slotaddr, size);
BUG_ON(!module);
offset = OLDCARD;
err = 0;
err |= get_dbe(pattern[0], module + OLDCARD + TC_PATTERN0);
err |= get_dbe(pattern[1], module + OLDCARD + TC_PATTERN1);
err |= get_dbe(pattern[2], module + OLDCARD + TC_PATTERN2);
err |= get_dbe(pattern[3], module + OLDCARD + TC_PATTERN3);
if (err) {
iounmap(module);
continue;
}
if (pattern[0] != 0x55 || pattern[1] != 0x00 ||
pattern[2] != 0xaa || pattern[3] != 0xff) {
offset = NEWCARD;
err = 0;
err |= get_dbe(pattern[0], module + TC_PATTERN0);
err |= get_dbe(pattern[1], module + TC_PATTERN1);
err |= get_dbe(pattern[2], module + TC_PATTERN2);
err |= get_dbe(pattern[3], module + TC_PATTERN3);
if (err) {
iounmap(module);
continue;
}
}
if (pattern[0] != 0x55 || pattern[1] != 0x00 ||
pattern[2] != 0xaa || pattern[3] != 0xff) {
iounmap(module);
continue;
}
tc_bus[slot].base_addr = slotaddr;
for (i = 0; i < 8; i++) {
tc_bus[slot].firmware[i] =
module[TC_FIRM_VER + offset + 4 * i];
tc_bus[slot].vendor[i] =
module[TC_VENDOR + offset + 4 * i];
tc_bus[slot].name[i] =
module[TC_MODULE + offset + 4 * i];
}
tc_bus[slot].firmware[8] = 0;
tc_bus[slot].vendor[8] = 0;
tc_bus[slot].name[8] = 0;
/*
* Looks unneccesary, but we may change
* TC? in the future
*/
switch (slot) {
case 0:
tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC0];
break;
case 1:
tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC1];
break;
case 2:
tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC2];
break;
/*
* Yuck! DS5000/200 onboard devices
*/
case 5:
tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC5];
break;
case 6:
tc_bus[slot].interrupt = dec_interrupt[DEC_IRQ_TC6];
break;
default:
tc_bus[slot].interrupt = -1;
break;
}
iounmap(module);
}
}
/*
* the main entry
*/
static int __init tc_init(void)
{
int tc_clock;
int i;
unsigned long slot0addr;
unsigned long slot_size;
if (!TURBOCHANNEL)
return 0;
for (i = 0; i < MAX_SLOT; i++) {
tc_bus[i].base_addr = 0;
tc_bus[i].name[0] = 0;
tc_bus[i].vendor[0] = 0;
tc_bus[i].firmware[0] = 0;
tc_bus[i].interrupt = -1;
tc_bus[i].flags = FREE;
}
info = rex_gettcinfo();
slot0addr = CPHYSADDR((long)rex_slot_address(0));
switch (mips_machtype) {
case MACH_DS5000_200:
num_tcslots = 7;
break;
case MACH_DS5000_1XX:
case MACH_DS5000_2X0:
case MACH_DS5900:
num_tcslots = 3;
break;
case MACH_DS5000_XX:
default:
num_tcslots = 2;
break;
}
tc_clock = 10000 / info->clk_period;
if (info->slot_size && slot0addr) {
pr_info("TURBOchannel rev. %d at %d.%d MHz (with%s parity)\n",
info->revision, tc_clock / 10, tc_clock % 10,
info->parity ? "" : "out");
slot_size = info->slot_size << 20;
tc_probe(slot0addr, slot_size, num_tcslots);
for (i = 0; i < num_tcslots; i++) {
if (!tc_bus[i].base_addr)
continue;
pr_info(" slot %d: %s %s %s\n", i, tc_bus[i].vendor,
tc_bus[i].name, tc_bus[i].firmware);
}
}
return 0;
}
subsys_initcall(tc_init);
EXPORT_SYMBOL(search_tc_card);
EXPORT_SYMBOL(claim_tc_card);
EXPORT_SYMBOL(release_tc_card);
EXPORT_SYMBOL(get_tc_base_addr);
EXPORT_SYMBOL(get_tc_irq_nr);
EXPORT_SYMBOL(get_tc_speed);
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