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NetBSD/sys/arch/acorn32/podulebus/simide.c

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/* $NetBSD: simide.c,v 1.11 2003/09/25 19:29:48 mycroft Exp $ */
/*
* Copyright (c) 1997-1998 Mark Brinicombe
* Copyright (c) 1997-1998 Causality Limited
*
* 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 Mark Brinicombe
* for the NetBSD Project.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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.
*
* Card driver and probe and attach functions to use generic IDE driver
* for the Simtec IDE podule
*/
/*
* Thanks to Gareth Simpson, Simtec Electronics for providing
* the hardware information
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: simide.c,v 1.11 2003/09/25 19:29:48 mycroft Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <machine/intr.h>
#include <machine/io.h>
#include <machine/bus.h>
#include <acorn32/podulebus/podulebus.h>
#include <acorn32/podulebus/simidereg.h>
#include <dev/ata/atavar.h>
#include <dev/ic/wdcvar.h>
#include <dev/podulebus/podules.h>
/*
* Simtec IDE podule device.
*
* This probes and attaches the top level Simtec IDE device to the podulebus.
* It then configures any children of the Simtec IDE device.
* The attach args specify whether it is configuring the primary or
* secondary channel.
* The children are expected to be wdc devices using simide attachments.
*/
/*
* Simtec IDE card softc structure.
*
* Contains the device node, podule information and global information
* required by the driver such as the card version and the interrupt mask.
*/
struct simide_softc {
struct wdc_softc sc_wdcdev; /* common wdc definitions */
struct channel_softc *wdc_chanarray[2]; /* channels definition */
podule_t *sc_podule; /* Our podule info */
int sc_podule_number; /* Our podule number */
int sc_ctl_reg; /* Global ctl reg */
int sc_version; /* Card version */
bus_space_tag_t sc_ctliot; /* Bus tag */
bus_space_handle_t sc_ctlioh; /* control handle */
struct bus_space sc_tag; /* custom tag */
struct simide_channel {
struct channel_softc wdc_channel; /* generic part */
irqhandler_t sc_ih; /* interrupt handler */
int sc_irqmask; /* IRQ mask for this channel */
} simide_channels[2];
};
int simide_probe __P((struct device *, struct cfdata *, void *));
void simide_attach __P((struct device *, struct device *, void *));
void simide_shutdown __P((void *arg));
int simide_intr __P((void *arg));
CFATTACH_DECL(simide, sizeof(struct simide_softc),
simide_probe, simide_attach, NULL, NULL);
/*
* Define prototypes for custom bus space functions.
*/
bs_rm_2_proto(simide);
bs_wm_2_proto(simide);
/*
* Create an array of address structures. These define the addresses and
* masks needed for the different channels.
*
* index = channel
*/
struct {
u_int drive_registers;
u_int aux_register;
u_int irq_mask;
} simide_info[] = {
{ PRIMARY_DRIVE_REGISTERS_POFFSET, PRIMARY_AUX_REGISTER_POFFSET,
CONTROL_PRIMARY_IRQ },
{ SECONDARY_DRIVE_REGISTERS_POFFSET, SECONDARY_AUX_REGISTER_POFFSET,
CONTROL_SECONDARY_IRQ }
};
/*
* Card probe function
*
* Just match the manufacturer and podule ID's
*/
int
simide_probe(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
struct podule_attach_args *pa = (void *)aux;
return (pa->pa_product == PODULE_SIMTEC_IDE);
}
/*
* Card attach function
*
* Identify the card version and configure any children.
* Install a shutdown handler to kill interrupts on shutdown
*/
void
simide_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct simide_softc *sc = (void *)self;
struct podule_attach_args *pa = (void *)aux;
int status;
u_int iobase;
int channel;
struct simide_channel *scp;
struct channel_softc *cp;
irqhandler_t *ihp;
/* Note the podule number and validate */
if (pa->pa_podule_number == -1)
panic("Podule has disappeared !");
sc->sc_podule_number = pa->pa_podule_number;
sc->sc_podule = pa->pa_podule;
podules[sc->sc_podule_number].attached = 1;
/*
* Ok we need our own bus tag as the register spacing
* is not the default.
*
* For the podulebus the bus tag cookie is the shift
* to apply to registers
* So duplicate the bus space tag and change the
* cookie.
*
* Also while we are at it replace the default
* read/write mulitple short functions with
* optimised versions
*/
sc->sc_tag = *pa->pa_iot;
sc->sc_tag.bs_cookie = (void *) DRIVE_REGISTER_SPACING_SHIFT;
sc->sc_tag.bs_rm_2 = simide_bs_rm_2;
sc->sc_tag.bs_wm_2 = simide_bs_wm_2;
sc->sc_ctliot = pa->pa_iot;
/* Obtain bus space handles for all the control registers */
if (bus_space_map(sc->sc_ctliot, pa->pa_podule->mod_base +
CONTROL_REGISTERS_POFFSET, CONTROL_REGISTER_SPACE, 0,
&sc->sc_ctlioh))
panic("%s: Cannot map control registers", self->dv_xname);
/* Install a clean up handler to make sure IRQ's are disabled */
if (shutdownhook_establish(simide_shutdown, (void *)sc) == NULL)
panic("%s: Cannot install shutdown handler", self->dv_xname);
/* Set the interrupt info for this podule */
sc->sc_podule->irq_addr = pa->pa_podule->mod_base
+ CONTROL_REGISTERS_POFFSET + (CONTROL_REGISTER_OFFSET << 2);
sc->sc_podule->irq_mask = STATUS_IRQ;
sc->sc_ctl_reg = 0;
status = bus_space_read_1(sc->sc_ctliot, sc->sc_ctlioh,
STATUS_REGISTER_OFFSET);
printf(":");
/* If any of the bits in STATUS_FAULT are zero then we have a fault. */
if ((status & STATUS_FAULT) != STATUS_FAULT)
printf(" card/cable fault (%02x) -", status);
if (!(status & STATUS_RESET))
printf(" (reset)");
if (!(status & STATUS_ADDR_TEST))
printf(" (addr)");
if (!(status & STATUS_CS_TEST))
printf(" (cs)");
if (!(status & STATUS_RW_TEST))
printf(" (rw)");
printf("\n");
/* Perhaps we should just abort at this point. */
/* if ((status & STATUS_FAULT) != STATUS_FAULT)
return;*/
/*
* Enable IDE, Obey IORDY and disabled slow mode
*/
sc->sc_ctl_reg |= CONTROL_IDE_ENABLE | CONTROL_IORDY
| CONTROL_SLOW_MODE_OFF;
bus_space_write_1(sc->sc_ctliot, sc->sc_ctlioh,
CONTROL_REGISTER_OFFSET, sc->sc_ctl_reg);
/* Fill in wdc and channel infos */
sc->sc_wdcdev.cap |= WDC_CAPABILITY_DATA16;
sc->sc_wdcdev.PIO_cap = 0;
sc->sc_wdcdev.channels = sc->wdc_chanarray;
sc->sc_wdcdev.nchannels = 2;
for (channel = 0 ; channel < 2; channel++) {
scp = &sc->simide_channels[channel];
sc->wdc_chanarray[channel] = &scp->wdc_channel;
cp = &scp->wdc_channel;
cp->channel = channel;
cp->wdc = &sc->sc_wdcdev;
cp->ch_queue = malloc(sizeof(struct channel_queue),
M_DEVBUF, M_NOWAIT);
if (cp->ch_queue == NULL) {
printf("%s %s channel: can't allocate memory for "
"command queue", self->dv_xname,
(channel == 0) ? "primary" : "secondary");
continue;
}
cp->cmd_iot = cp->ctl_iot = &sc->sc_tag;
iobase = pa->pa_podule->mod_base;
if (bus_space_map(cp->cmd_iot, iobase +
simide_info[channel].drive_registers,
DRIVE_REGISTERS_SPACE, 0, &cp->cmd_ioh))
continue;
if (bus_space_map(cp->ctl_iot, iobase +
simide_info[channel].aux_register, 4, 0, &cp->ctl_ioh)) {
bus_space_unmap(cp->cmd_iot, cp->cmd_ioh,
DRIVE_REGISTERS_SPACE);
continue;
}
/* Disable interrupts and clear any pending interrupts */
scp->sc_irqmask = simide_info[channel].irq_mask;
sc->sc_ctl_reg &= ~scp->sc_irqmask;
bus_space_write_1(sc->sc_ctliot, sc->sc_ctlioh,
CONTROL_REGISTER_OFFSET, sc->sc_ctl_reg);
ihp = &scp->sc_ih;
ihp->ih_func = simide_intr;
ihp->ih_arg = scp;
ihp->ih_level = IPL_BIO;
ihp->ih_name = "simide";
ihp->ih_maskaddr = pa->pa_podule->irq_addr;
ihp->ih_maskbits = scp->sc_irqmask;
if (irq_claim(sc->sc_podule->interrupt, ihp))
panic("%s: Cannot claim interrupt %d",
self->dv_xname, sc->sc_podule->interrupt);
/* clear any pending interrupts and enable interrupts */
sc->sc_ctl_reg |= scp->sc_irqmask;
bus_space_write_1(sc->sc_ctliot, sc->sc_ctlioh,
CONTROL_REGISTER_OFFSET, sc->sc_ctl_reg);
}
wdcattach(&sc->sc_wdcdev);
}
/*
* Card shutdown function
*
* Called via do_shutdown_hooks() during kernel shutdown.
* Clear the cards's interrupt mask to stop any podule interrupts.
*/
void
simide_shutdown(arg)
void *arg;
{
struct simide_softc *sc = arg;
sc->sc_ctl_reg &= (CONTROL_PRIMARY_IRQ | CONTROL_SECONDARY_IRQ);
/* Disable card interrupts */
bus_space_write_1(sc->sc_ctliot, sc->sc_ctlioh,
CONTROL_REGISTER_OFFSET, sc->sc_ctl_reg);
}
/*
* Podule interrupt handler
*
* If the interrupt was from our card pass it on to the wdc interrupt handler
*/
int
simide_intr(arg)
void *arg;
{
struct simide_channel *scp = arg;
irqhandler_t *ihp = &scp->sc_ih;
volatile u_char *intraddr = (volatile u_char *)ihp->ih_maskaddr;
/* XXX - not bus space yet - should really be handled by podulebus */
if ((*intraddr) & ihp->ih_maskbits)
wdcintr(&scp->wdc_channel);
return(0);
}
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