/* $NetBSD: xel.c,v 1.18 2014/03/26 08:17:59 christos Exp $ */
/*
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Minoura Makoto.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* TSR Xellent30 driver.
* Detect Xellent30, and reserve its I/O area.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: xel.c,v 1.18 2014/03/26 08:17:59 christos Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <machine/cpu.h>
#include <machine/bus.h>
#include <arch/x68k/dev/intiovar.h>
static paddr_t xel_addr(device_t, cfdata_t, struct intio_attach_args *);
static int xel_probe(paddr_t);
static int xel_match(device_t, cfdata_t, void *);
static void xel_attach(device_t, device_t, void *);
struct xel_softc {
bus_space_tag_t sc_bst;
bus_space_handle_t sc_bh;
};
CFATTACH_DECL_NEW(xel, sizeof(struct xel_softc),
xel_match, xel_attach, NULL, NULL);
static paddr_t xel_addrs[] = { 0xec0000, 0xec4000, 0xec8000, 0xecc000 };
#define XEL_MODE_RAM_LOWER 0x00
#define XEL_MODE_RAM_HIGHER 0x01
#define XEL_MODE_UNMAP_RAM 0x00
#define XEL_MODE_MAP_RAM 0x02
#define XEL_MODE_MPU_000 0x00
#define XEL_MODE_MPU_030 0x04
#define XEL_RAM_ADDR_LOWER 0xbc0000
#define XEL_RAM_ADDR_HIGHER 0xfc0000
static paddr_t
xel_addr(device_t parent, cfdata_t match, struct intio_attach_args *ia)
{
paddr_t addr = 0;
if (match->cf_addr == INTIOCF_ADDR_DEFAULT) {
int i;
for (i = 0; i < sizeof(xel_addrs)/sizeof(xel_addrs[0]); i++) {
if (xel_probe(xel_addrs[i])) {
addr = xel_addrs[i];
break;
}
}
} else {
if (xel_probe((paddr_t) match->cf_addr))
addr = (paddr_t) match->cf_addr;
}
if (addr) {
/* found! */
ia->ia_addr = (int) addr;
ia->ia_size = 0x4000;
if (intio_map_allocate_region(parent, ia, INTIO_MAP_TESTONLY)
< 0)
return 0;
else
return addr;
}
return 0;
}
extern int *nofault;
static int
xel_probe(paddr_t addr)
{
u_int32_t b1, b2;
volatile u_int16_t *start = (volatile u_int16_t *)IIOV(addr);
label_t faultbuf;
volatile u_int32_t *sram = (volatile u_int32_t *)IIOV(XEL_RAM_ADDR_HIGHER);
if (badaddr(start))
return 0;
nofault = (int *) &faultbuf;
if (setjmp(&faultbuf)) {
nofault = NULL;
return 0;
}
b1 = sram[0];
b2 = sram[1];
/* Try to map the Xellent local memory. */
start[0] = XEL_MODE_RAM_HIGHER | XEL_MODE_MAP_RAM | XEL_MODE_MPU_030;
#if 0
/* the contents should be deferent. */
if (b1 == sram[0] && b2 == sram[1]) {
nofault = (int *) 0;
return 0;
}
#else
/* Try to write to the local memory. */
sram[0] = 0x55555555;
sram[1] = 0xaaaaaaaa;
if (sram[0] != 0x55555555 || sram[1] != 0xaaaaaaaa) {
sram[0] = b1;
sram[1] = b2;
nofault = (int *) 0;
return 0;
}
sram[0] = 0xaaaaaaaa;
sram[1] = 0x55555555;
if (sram[0] != 0xaaaaaaaa || sram[1] != 0x55555555) {
sram[0] = b1;
sram[1] = b2;
nofault = (int *) 0;
return 0;
}
sram[0] = b1;
sram[1] = b2;
#endif
/* Unmap. */
start[0] = XEL_MODE_UNMAP_RAM | XEL_MODE_MPU_030;
nofault = NULL;
return 1;
}
static int
xel_match(device_t parent, cfdata_t match, void *aux)
{
struct intio_attach_args *ia = aux;
if (strcmp(ia->ia_name, "xel") != 0)
return 0;
if (xel_addr(parent, match, ia)) {
#ifdef DIAGNOSTIC
if (cputype != CPU_68030)
panic("Non-030 Xellent???");
#endif
return 1;
}
return 0;
}
static void
xel_attach(device_t parent, device_t self, void *aux)
{
struct xel_softc *sc = device_private(self);
struct intio_attach_args *ia = aux;
cfdata_t cf = device_cfdata(self);
paddr_t addr;
int r __diagused;
addr = xel_addr(parent, cf, aux);
sc->sc_bst = ia->ia_bst;
ia->ia_addr = (int) addr;
ia->ia_size = 0x4000;
r = intio_map_allocate_region(parent, ia, INTIO_MAP_ALLOCATE);
#ifdef DIAGNOSTIC
if (r)
panic("IO map for Xellent30 corruption??");
#endif
aprint_normal(": Xellent30 MPU Accelerator.\n");
return;
}
