/* $NetBSD: xp.c,v 1.5 2019/06/30 05:04:48 tsutsui Exp $ */
/*-
* Copyright (c) 2016 Izumi Tsutsui. All rights reserved.
*
* 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 AUTHOR ``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 AUTHOR 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.
*/
/*
* LUNA's Hitachi HD647180 "XP" I/O processor driver
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: xp.c,v 1.5 2019/06/30 05:04:48 tsutsui Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/ioctl.h>
#include <sys/kmem.h>
#include <sys/errno.h>
#include <uvm/uvm_extern.h>
#include <machine/autoconf.h>
#include <machine/board.h>
#include <machine/xpio.h>
#include "ioconf.h"
#define TRI_PORT_RAM_XP_OFFSET 0x00000
#define XP_SHM_BASE (TRI_PORT_RAM + TRI_PORT_RAM_XP_OFFSET)
#define XP_SHM_SIZE 0x00010000 /* 64KB for XP; rest 64KB for lance */
#define XP_TAS_ADDR OBIO_TAS
struct xp_softc {
device_t sc_dev;
vaddr_t sc_shm_base;
vsize_t sc_shm_size;
vaddr_t sc_tas;
bool sc_isopen;
};
static int xp_match(device_t, cfdata_t, void *);
static void xp_attach(device_t, device_t, void *);
dev_type_open(xp_open);
dev_type_close(xp_close);
dev_type_read(xp_read);
dev_type_write(xp_write);
dev_type_ioctl(xp_ioctl);
dev_type_mmap(xp_mmap);
const struct cdevsw xp_cdevsw = {
.d_open = xp_open,
.d_close = xp_close,
.d_read = xp_read,
.d_write = xp_write,
.d_ioctl = xp_ioctl,
.d_stop = nostop,
.d_tty = notty,
.d_poll = nopoll,
.d_mmap = xp_mmap,
.d_kqfilter = nokqfilter,
.d_discard = nodiscard,
.d_flag = 0
};
CFATTACH_DECL_NEW(xp, sizeof(struct xp_softc),
xp_match, xp_attach, NULL, NULL);
/* #define XP_DEBUG */
#ifdef XP_DEBUG
#define XP_DEBUG_ALL 0xff
uint32_t xp_debug = 0;
#define DPRINTF(x, y) if (xp_debug & (x)) printf y
#else
#define DPRINTF(x, y) /* nothing */
#endif
static bool xp_matched;
/*
* PIO 0 port C is connected to XP's reset line
*
* XXX: PIO port functions should be shared with machdep.c for DIP SWs
*/
#define PIO_ADDR OBIO_PIO0_BASE
#define PORT_A 0
#define PORT_B 1
#define PORT_C 2
#define CTRL 3
/* PIO0 Port C bit definition */
#define XP_INT1_REQ 0 /* INTR B */
/* unused */ /* IBF B */
#define XP_INT1_ENA 2 /* INTE B */
#define XP_INT5_REQ 3 /* INTR A */
#define XP_INT5_ENA 4 /* INTE A */
/* unused */ /* IBF A */
#define PARITY 6 /* PC6 output to enable parity error */
#define XP_RESET 7 /* PC7 output to reset HD647180 XP */
/* Port control for PC6 and PC7 */
#define ON 1
#define OFF 0
static uint8_t put_pio0c(uint8_t bit, uint8_t set)
{
volatile uint8_t * const pio0 = (uint8_t *)PIO_ADDR;
pio0[CTRL] = (bit << 1) | (set & 0x01);
return pio0[PORT_C];
}
static int
xp_match(device_t parent, cfdata_t cf, void *aux)
{
struct mainbus_attach_args *maa = aux;
/* only one XP processor */
if (xp_matched)
return 0;
if (strcmp(maa->ma_name, xp_cd.cd_name))
return 0;
if (maa->ma_addr != XP_SHM_BASE)
return 0;
xp_matched = true;
return 1;
}
static void
xp_attach(device_t parent, device_t self, void *aux)
{
struct xp_softc *sc = device_private(self);
sc->sc_dev = self;
aprint_normal(": HD647180X I/O processor\n");
sc->sc_shm_base = XP_SHM_BASE;
sc->sc_shm_size = XP_SHM_SIZE;
sc->sc_tas = XP_TAS_ADDR;
}
int
xp_open(dev_t dev, int flags, int devtype, struct lwp *l)
{
struct xp_softc *sc;
int unit;
DPRINTF(XP_DEBUG_ALL, ("%s\n", __func__));
unit = minor(dev);
sc = device_lookup_private(&xp_cd, unit);
if (sc == NULL)
return ENXIO;
if (sc->sc_isopen)
return EBUSY;
sc->sc_isopen = true;
return 0;
}
int
xp_close(dev_t dev, int flags, int mode, struct lwp *l)
{
struct xp_softc *sc;
int unit;
DPRINTF(XP_DEBUG_ALL, ("%s\n", __func__));
unit = minor(dev);
sc = device_lookup_private(&xp_cd, unit);
sc->sc_isopen = false;
return 0;
}
int
xp_ioctl(dev_t dev, u_long cmd, void *addr, int flags, struct lwp *l)
{
struct xp_softc *sc;
int unit, error;
struct xp_download *downld;
uint8_t *loadbuf;
size_t loadsize;
DPRINTF(XP_DEBUG_ALL, ("%s\n", __func__));
unit = minor(dev);
sc = device_lookup_private(&xp_cd, unit);
switch (cmd) {
case XPIOCDOWNLD:
downld = addr;
loadsize = downld->size;
if (loadsize == 0 || loadsize > sc->sc_shm_size) {
return EINVAL;
}
loadbuf = kmem_alloc(loadsize, KM_SLEEP);
error = copyin(downld->data, loadbuf, loadsize);
if (error == 0) {
put_pio0c(XP_RESET, ON);
delay(100);
memcpy((void *)sc->sc_shm_base, loadbuf, loadsize);
delay(100);
put_pio0c(XP_RESET, OFF);
} else {
DPRINTF(XP_DEBUG_ALL, ("%s: ioctl failed (err = %d)\n",
__func__, error));
}
kmem_free(loadbuf, loadsize);
return error;
default:
return ENOTTY;
}
panic("%s: cmd (%ld) is not handled", device_xname(sc->sc_dev), cmd);
}
paddr_t
xp_mmap(dev_t dev, off_t offset, int prot)
{
struct xp_softc *sc;
int unit;
paddr_t pa;
pa = -1;
unit = minor(dev);
sc = device_lookup_private(&xp_cd, unit);
if (offset >= 0 &&
offset < sc->sc_shm_size) {
pa = m68k_btop(m68k_trunc_page(sc->sc_shm_base) + offset);
}
return pa;
}
int
xp_read(dev_t dev, struct uio *uio, int flags)
{
return ENODEV;
}
int
xp_write(dev_t dev, struct uio *uio, int flags)
{
return ENODEV;
}