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NetBSD/sys/dev/eisa/mlx_eisa.c

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/* $NetBSD: mlx_eisa.c,v 1.3 2001/05/10 09:41:19 ad Exp $ */
/*-
* Copyright (c) 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Andrew Doran.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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.
*/
/*
* EISA front-end for mlx(4) driver.
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <machine/bus.h>
#include <machine/intr.h>
#include <dev/eisa/eisavar.h>
#include <dev/eisa/eisadevs.h>
#include <dev/ic/mlxreg.h>
#include <dev/ic/mlxio.h>
#include <dev/ic/mlxvar.h>
#define MLX_EISA_SLOT_OFFSET 0x0c89
#define MLX_EISA_IOSIZE (0x0ce0 - MLX_EISA_SLOT_OFFSET)
#define MLX_EISA_IOCONF1 (0x0cc1 - MLX_EISA_SLOT_OFFSET)
#define MLX_EISA_IOCONF2 (0x0cc3 - MLX_EISA_SLOT_OFFSET)
static void mlx_eisa_attach(struct device *, struct device *, void *);
static int mlx_eisa_match(struct device *, struct cfdata *, void *);
static int mlx_v1_submit(struct mlx_softc *, struct mlx_ccb *);
static int mlx_v1_findcomplete(struct mlx_softc *, u_int *, u_int *);
static void mlx_v1_intaction(struct mlx_softc *, int);
static int mlx_v1_fw_handshake(struct mlx_softc *, int *, int *, int *);
#ifdef MLX_RESET
static int mlx_v1_reset(struct mlx_softc *);
#endif
struct cfattach mlx_eisa_ca = {
sizeof(struct mlx_softc), mlx_eisa_match, mlx_eisa_attach
};
static const char * const mlx_eisa_prod[] = {
"MLX0070",
"MLX0071",
"MLX0072",
"MLX0073",
"MLX0074",
"MLX0075",
"MLX0076",
"MLX0077",
};
static int
mlx_eisa_match(struct device *parent, struct cfdata *match, void *aux)
{
struct eisa_attach_args *ea;
int i;
ea = aux;
for (i = 0; i < sizeof(mlx_eisa_prod) / sizeof(mlx_eisa_prod[0]); i++)
if (strcmp(ea->ea_idstring, mlx_eisa_prod[i]) == 0)
return (1);
return (0);
}
static void
mlx_eisa_attach(struct device *parent, struct device *self, void *aux)
{
struct eisa_attach_args *ea;
bus_space_handle_t ioh;
eisa_chipset_tag_t ec;
eisa_intr_handle_t ih;
struct mlx_softc *mlx;
bus_space_tag_t iot;
const char *intrstr;
int irq, le;
ea = aux;
mlx = (struct mlx_softc *)self;
iot = ea->ea_iot;
ec = ea->ea_ec;
if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot) +
MLX_EISA_SLOT_OFFSET, MLX_EISA_IOSIZE, 0, &ioh)) {
printf("can't map i/o space\n");
return;
}
mlx->mlx_iot = iot;
mlx->mlx_ioh = ioh;
mlx->mlx_dmat = ea->ea_dmat;
/*
* Map and establish the interrupt.
*/
switch (bus_space_read_1(iot, ioh, MLX_EISA_IOCONF1) & 0xf0) {
case 0xa0:
irq = 11;
break;
case 0xc0:
irq = 12;
break;
case 0xe0:
irq = 14;
break;
case 0x80:
irq = 15;
break;
default:
printf("controller on invalid IRQ\n");
return;
}
if (eisa_intr_map(ec, irq, &ih)) {
printf("can't map interrupt (%d)\n", irq);
return;
}
if ((bus_space_read_1(iot, ioh, MLX_EISA_IOCONF1) & 0x08) != 0)
le = IST_LEVEL;
else
le = IST_EDGE;
intrstr = eisa_intr_string(ec, ih);
mlx->mlx_ih = eisa_intr_establish(ec, ih, le, IPL_BIO, mlx_intr, mlx);
if (mlx->mlx_ih == NULL) {
printf("can't establish interrupt");
if (intrstr != NULL)
printf(" at %s", intrstr);
printf("\n");
return;
}
mlx->mlx_flags = MLXF_EISA;
mlx->mlx_submit = mlx_v1_submit;
mlx->mlx_findcomplete = mlx_v1_findcomplete;
mlx->mlx_intaction = mlx_v1_intaction;
mlx->mlx_fw_handshake = mlx_v1_fw_handshake;
#ifdef MLX_RESET
mlx->mlx_reset = mlx_v1_reset;
#endif
printf(": Mylex RAID\n");
mlx_init(mlx, intrstr);
}
/*
* ================= V1 interface linkage =================
*/
/*
* Try to give (mc) to the controller. Returns 1 if successful, 0 on
* failure (the controller is not ready to take a command).
*
* Must be called at splbio or in a fashion that prevents reentry.
*/
static int
mlx_v1_submit(struct mlx_softc *mlx, struct mlx_ccb *mc)
{
/* Ready for our command? */
if ((mlx_inb(mlx, MLX_V1REG_IDB) & MLX_V1_IDB_FULL) == 0) {
/* Copy mailbox data to window. */
bus_space_write_region_1(mlx->mlx_iot, mlx->mlx_ioh,
MLX_V1REG_MAILBOX, mc->mc_mbox, MLX_V1_MAILBOX_LEN);
bus_space_barrier(mlx->mlx_iot, mlx->mlx_ioh,
MLX_V1REG_MAILBOX, MLX_V1_MAILBOX_LEN,
BUS_SPACE_BARRIER_WRITE);
/* Post command. */
mlx_outb(mlx, MLX_V1REG_IDB, MLX_V3_IDB_FULL);
return (1);
}
return (0);
}
/*
* See if a command has been completed, if so acknowledge its completion and
* recover the slot number and status code.
*
* Must be called at splbio or in a fashion that prevents reentry.
*/
static int
mlx_v1_findcomplete(struct mlx_softc *mlx, u_int *slot, u_int *status)
{
/* Status available? */
if ((mlx_inb(mlx, MLX_V3REG_ODB) & MLX_V3_ODB_SAVAIL) != 0) {
*slot = mlx_inb(mlx, MLX_V1REG_MAILBOX + 0x0d);
*status = mlx_inw(mlx, MLX_V1REG_MAILBOX + 0x0e);
/* Acknowledge completion. */
mlx_outb(mlx, MLX_V1REG_ODB, MLX_V1_ODB_SAVAIL);
mlx_outb(mlx, MLX_V1REG_IDB, MLX_V1_IDB_SACK);
return (1);
}
return (0);
}
/*
* Enable/disable interrupts as requested. (No acknowledge required)
*
* Must be called at splbio or in a fashion that prevents reentry.
*/
static void
mlx_v1_intaction(struct mlx_softc *mlx, int action)
{
mlx_outb(mlx, MLX_V1REG_IE, action ? 1 : 0);
}
/*
* Poll for firmware error codes during controller initialisation.
*
* Returns 0 if initialisation is complete, 1 if still in progress but no
* error has been fetched, 2 if an error has been retrieved.
*/
static int
mlx_v1_fw_handshake(struct mlx_softc *mlx, int *error, int *param1, int *param2)
{
u_int8_t fwerror;
/*
* First time around, enable the IDB interrupt and clear any
* hardware completion status.
*/
if ((mlx->mlx_flags & MLXF_FW_INITTED) == 0) {
mlx_outb(mlx, MLX_V1REG_ODB_EN, 1);
DELAY(1000);
mlx_outb(mlx, MLX_V1REG_IDB, MLX_V1_IDB_SACK);
DELAY(1000);
mlx->mlx_flags |= MLXF_FW_INITTED;
}
/* Init in progress? */
if ((mlx_inb(mlx, MLX_V1REG_IDB) & MLX_V1_IDB_INIT_BUSY) == 0)
return (0);
/* Test error value. */
fwerror = mlx_inb(mlx, MLX_V1REG_ODB);
if ((fwerror & MLX_V1_FWERROR_PEND) == 0)
return (1);
/* XXX Fetch status. */
*error = fwerror & 0xf0;
*param1 = -1;
*param2 = -1;
/* Acknowledge. */
mlx_outb(mlx, MLX_V1REG_ODB, fwerror);
return (2);
}
#ifdef MLX_RESET
/*
* Reset the controller. Return non-zero on failure.
*/
static int
mlx_v1_reset(struct mlx_softc *mlx)
{
int i;
mlx_outb(mlx, MLX_V1REG_IDB, MLX_V1_IDB_SACK);
delay(1000000);
/* Wait up to 2 minutes for the bit to clear. */
for (i = 120; i != 0; i--) {
delay(1000000);
if ((mlx_inb(mlx, MLX_V1REG_IDB) & MLX_V1_IDB_SACK) == 0)
break;
}
if (i == 0)
return (-1);
mlx_outb(mlx, MLX_V1REG_ODB, MLX_V1_ODB_RESET);
mlx_outb(mlx, MLX_V1REG_IDB, MLX_V1_IDB_RESET);
/* Wait up to 5 seconds for the bit to clear... */
for (i = 5; i != 0; i--) {
delay(1000000);
if ((mlx_inb(mlx, MLX_V1REG_IDB) & MLX_V1_IDB_RESET) == 0)
break;
}
if (i == 0)
return (-1);
/* Wait up to 3 seconds for the other bit to clear... */
for (i = 5; i != 0; i--) {
delay(1000000);
if ((mlx_inb(mlx, MLX_V1REG_ODB) & MLX_V1_ODB_RESET) == 0)
break;
}
if (i == 0)
return (-1);
return (0);
}
#endif /* MLX_RESET */
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