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NetBSD/sys/arch/arm32/podulebus/rapide.c

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/* $NetBSD: rapide.c,v 1.7 1998/01/18 04:09:52 mark Exp $ */
/*
* Copyright (c) 1997 Mark Brinicombe
* Copyright (c) 1997 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
* 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 RapIDE podule
*/
/*
* Thanks to Chris Honey at Raymond Datalink for providing information on
* addressing the RapIDE podule.
* RapIDE32 is Copyright (C) 1995,1996 Raymond Datalink. RapIDE32 is
* manufactured under license by Yellowstone Educational Solutions.
*/
/*
* At present this driver only supports the Issue 2 RapIDE podule.
*/
/*
* A small amount of work is required for Issue 1 podule support.
* The primary differences are the register addresses.
* Things are eased by the fact that we can identify the card by register
* the same register on both issues of the podule.
* Once we kmnow the issue we must change all our addresses accordingly.
* All the control registers are mapped the same between cards.
* The interrupt handler needs to take note that the issue 1 card needs
* the interrupt to be cleared via the interrupt clear register.
* This means we share addresses for the mapping of the control block and
* thus the card driver does not need to know about the differences.
* The differences show up a the controller level.
* A structure is used to hold the information about the addressing etc.
* An array of these structures holds the information for the primary and
* secondary connectors. This needs to be extended to hold this information
* for both issues. Then the indexing of this structures will utilise the
* card version number.
*
* Opps just noticed a mistake. The interrupt request register is different
* between cards so the card level attach routine will need to consider this.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/conf.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/buf.h>
#include <sys/uio.h>
#include <sys/malloc.h>
#include <sys/device.h>
#include <sys/disklabel.h>
#include <sys/disk.h>
#include <sys/syslog.h>
#include <sys/proc.h>
#include <vm/vm.h>
#include <machine/irqhandler.h>
#include <machine/katelib.h>
#include <machine/io.h>
#include <machine/bus.h>
#include <machine/bootconfig.h>
#include <arm32/iomd/iomdreg.h>
#include <arm32/podulebus/podulebus.h>
#include <arm32/podulebus/podules.h>
#include <arm32/podulebus/rapidereg.h>
#include <arm32/dev/wdreg.h>
#include <arm32/dev/wdlink.h>
/*
* RapIDE podule device.
*
* This probes and attaches the top level RapIDE device to the podulebus.
* It then configures any children of the RapIDE device.
* The attach args specify whether it is configuring the primary or
* secondary channel.
* The children are expected to be wdc devices using rapide attachments.
*/
/*
* RapIDE 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 rapide_softc {
struct device sc_dev; /* device node */
podule_t *sc_podule; /* Our podule info */
int sc_podule_number; /* Our podule number */
int sc_intr_enable_mask; /* Global intr mask */
int sc_version; /* Card version */
bus_space_tag_t sc_iot; /* Bus tag */
bus_space_handle_t sc_ctl_ioh; /* control handler */
};
int rapide_probe __P((struct device *, struct cfdata *, void *));
void rapide_attach __P((struct device *, struct device *, void *));
void rapide_shutdown __P((void *arg));
struct cfattach rapide_ca = {
sizeof(struct rapide_softc), rapide_probe, rapide_attach
};
/*
* Attach arguments for child devices.
* Pass the podule details, the parent softc and the channel
*/
struct rapide_attach_args {
struct podule_attach_args *ra_pa; /* podule info */
struct rapide_softc *ra_softc; /* parent softc */
bus_space_tag_t ra_iot; /* bus space tag */
int ra_channel; /* IDE channel */
};
/*
* We have a private bus space tag.
* This is created by copying the podulebus tag and then replacing
* a couple of the transfer functions.
*/
static struct bus_space rapide_bs_tag;
bs_rm_4_proto(rapide);
bs_wm_4_proto(rapide);
/* Print function used during child config */
int
rapide_print(aux, name)
void *aux;
const char *name;
{
struct rapide_attach_args *ra = aux;
if (!name)
printf(": %s channel", (ra->ra_channel == 0) ? "primary" : "secondary");
return(UNCONF);
}
/*
* Card probe function
*
* Just match the manufacturer and podule ID's
*/
int
rapide_probe(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
struct podule_attach_args *pa = (void *)aux;
if (matchpodule(pa, MANUFACTURER_YES, PODULE_YES_RAPIDE, -1) == 0)
return(0);
return(1);
}
/*
* Card attach function
*
* Identify the card version and configure any children.
* Install a shutdown handler to kill interrupts on shutdown
*/
void
rapide_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct rapide_softc *sc = (void *)self;
struct podule_attach_args *pa = (void *)aux;
struct rapide_attach_args ra;
bus_space_tag_t iot;
bus_space_handle_t ctl_ioh;
/* 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;
set_easi_cycle_type(sc->sc_podule_number, EASI_CYCLE_TYPE_C);
/*
* Duplicate the podule bus space tag and provide alternative
* bus_space_read_multiple_4() and bus_space_write_multiple_4()
* functions.
*/
rapide_bs_tag = *pa->pa_iot;
rapide_bs_tag.bs_rm_4 = rapide_rm_4;
rapide_bs_tag.bs_wm_4 = rapide_wm_4;
sc->sc_iot = iot = &rapide_bs_tag;
if (bus_space_map(iot, pa->pa_podule->easi_base +
CONTROL_REGISTERS_OFFSET, CONTROL_REGISTER_SPACE, 0, &ctl_ioh))
panic("%s: Cannot map control registers\n", self->dv_xname);
sc->sc_ctl_ioh = ctl_ioh;
sc->sc_version = bus_space_read_1(iot, ctl_ioh, VERSION_REGISTER_OFFSET) & VERSION_REGISTER_MASK;
/* bus_space_unmap(iot, ctl_ioh, CONTROL_REGISTER_SPACE);*/
printf(" Issue %d\n", sc->sc_version + 1);
if (sc->sc_version != VERSION_2_ID)
return;
if (shutdownhook_establish(rapide_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->easi_base
+ CONTROL_REGISTERS_OFFSET + IRQ_REQUEST_REGISTER_BYTE_OFFSET;
sc->sc_podule->irq_mask = IRQ_MASK;
/* Configure the children */
sc->sc_intr_enable_mask = 0;
ra.ra_softc = sc;
ra.ra_pa = pa;
ra.ra_iot = iot;
ra.ra_channel = 0;
config_found_sm(self, &ra, rapide_print, NULL);
ra.ra_channel = 1;
config_found_sm(self, &ra, rapide_print, NULL);
}
/*
* Card shutdown function
*
* Called via do_shutdown_hooks() during kernel shutdown.
* Clear the cards's interrupt mask to stop any podule interrupts.
*/
void
rapide_shutdown(arg)
void *arg;
{
struct rapide_softc *sc = arg;
/* Disable card interrupts */
bus_space_write_1(sc->sc_iot, sc->sc_ctl_ioh,
IRQ_MASK_REGISTER_OFFSET, 0);
}
/*
* RapIDE probe and attach code for the wdc device.
*
* This provides a different pair of probe and attach functions
* for attaching the wdc device (mainbus/wd.c) to the RapIDE card.
*/
struct rapwdc_softc {
struct wdc_softc sc_wdc; /* Device node */
irqhandler_t sc_ih; /* interrupt handler */
podule_t *sc_podule; /* Our podule */
int sc_podule_number; /* Our podule number */
bus_space_tag_t sc_iot; /* Bus space tag */
bus_space_handle_t sc_ioh; /* handle for registers */
bus_space_handle_t sc_aux_ioh; /* handle for aux registers */
bus_space_handle_t sc_ctl_ioh; /* handle for control space */
bus_space_handle_t sc_data_ioh; /* handle for 32bit data */
int sc_irqmask; /* IRQ mask for this channel */
int sc_channel; /* channel number */
int sc_pio_mode[2]; /* PIO mode */
struct rapide_softc *sc_softc; /* pointer to parent */
};
int wdc_rapide_probe __P((struct device *, struct cfdata *, void *));
void wdc_rapide_attach __P((struct device *, struct device *, void *));
int wdc_rapide_intr __P((void *));
extern int wdcintr __P((void *));
struct cfattach wdc_rapide_ca = {
sizeof(struct rapwdc_softc), wdc_rapide_probe, wdc_rapide_attach
};
/*
* Create an array of address structures. These define the addresses and
* masks needed for the different channels for the card.
*
* XXX - Needs some work for issue 1 cards.
*/
struct {
u_int registers;
u_int aux_register;
u_int data_register;
u_int irq_mask;
} rapide_info[] = {
{ PRIMARY_DRIVE_REGISTERS_OFFSET, PRIMARY_AUX_REGISTER_OFFSET,
PRIMARY_DATA_REGISTER_OFFSET, PRIMARY_IRQ_MASK },
{ SECONDARY_DRIVE_REGISTERS_OFFSET, SECONDARY_AUX_REGISTER_OFFSET,
SECONDARY_DATA_REGISTER_OFFSET, SECONDARY_IRQ_MASK }
};
/*
* Controller probe function
*
* Map all the required I/O space for this channel, make sure interrupts
* are disabled and probe the bus.
*/
int
wdc_rapide_probe(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
struct rapide_attach_args *ra = (void *)aux;
struct podule_attach_args *pa = ra->ra_pa;
struct rapide_softc *sc;
bus_space_tag_t iot;
bus_space_handle_t ioh;
bus_space_handle_t aux_ioh;
bus_space_handle_t ctl_ioh;
bus_space_handle_t data_ioh;
int rv;
iot = ra->ra_iot;
sc = ra->ra_softc;
#ifdef DIAGNOSTIC
if (ra->ra_channel < 0 || ra->ra_channel > 1)
return(0);
#endif /* DIAGNOSTIC */
if (bus_space_map(iot, pa->pa_podule->easi_base +
rapide_info[ra->ra_channel].registers, DRIVE_REGISTERS_SPACE, 0, &ioh))
return(0);
if (bus_space_map(iot, pa->pa_podule->easi_base +
rapide_info[ra->ra_channel].aux_register, 4, 0, &aux_ioh)) {
bus_space_unmap(iot, ioh, DRIVE_REGISTERS_SPACE);
return(0);
}
if (bus_space_map(iot, pa->pa_podule->easi_base +
rapide_info[ra->ra_channel].data_register, 4, 0, &data_ioh)) {
bus_space_unmap(iot, ioh, DRIVE_REGISTERS_SPACE);
bus_space_unmap(iot, aux_ioh, 4);
return(0);
}
if (bus_space_map(iot, pa->pa_podule->easi_base +
CONTROL_REGISTERS_OFFSET, CONTROL_REGISTER_SPACE, 0, &ctl_ioh)) {
bus_space_unmap(iot, ioh, DRIVE_REGISTERS_SPACE);
bus_space_unmap(iot, aux_ioh, 4);
bus_space_unmap(iot, data_ioh, 4);
return(0);
}
/* Disable interrupts and clear any pending interrupts */
sc->sc_intr_enable_mask &= ~rapide_info[ra->ra_channel].irq_mask;
bus_space_write_1(iot, ctl_ioh, IRQ_MASK_REGISTER_OFFSET,
sc->sc_intr_enable_mask);
/* XXX - Issue 1 cards will need to clear any pending interrupts */
rv = wdcprobe_internal(iot, ioh, aux_ioh, ioh, data_ioh, "rapide_probe"); /* XXX */
bus_space_unmap(iot, ioh, DRIVE_REGISTERS_SPACE);
bus_space_unmap(iot, aux_ioh, 4);
bus_space_unmap(iot, ctl_ioh, CONTROL_REGISTER_SPACE);
bus_space_unmap(iot, data_ioh, 4);
return(rv);
}
/*
* Controller attach function
*
* Map all the required I/O space for this channel, disble interrupts
* and attach the controller. The generic attach will probe and attach
* any devices.
* Install an interrupt handler and we are ready to rock.
*/
void
wdc_rapide_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct rapwdc_softc *wdc = (void *)self;
struct rapide_attach_args *ra = (void *)aux;
struct podule_attach_args *pa = ra->ra_pa;
struct rapide_softc *sc;
bus_space_tag_t iot;
bus_space_handle_t ioh;
bus_space_handle_t aux_ioh;
bus_space_handle_t ctl_ioh;
bus_space_handle_t data_ioh;
/* Note the podule number and validate */
wdc->sc_podule_number = pa->pa_podule_number;
wdc->sc_podule = pa->pa_podule;
wdc->sc_channel = ra->ra_channel;
wdc->sc_irqmask = rapide_info[ra->ra_channel].irq_mask;
wdc->sc_iot = iot = ra->ra_iot;
sc = ra->ra_softc;
if (bus_space_map(iot, pa->pa_podule->easi_base
+ rapide_info[ra->ra_channel].registers,
DRIVE_REGISTERS_SPACE, 0, &ioh))
panic("%s: Cannot map drive registers\n", self->dv_xname);
if (bus_space_map(iot, pa->pa_podule->easi_base +
rapide_info[ra->ra_channel].aux_register, 4, 0, &aux_ioh))
panic("%s: Cannot map auxilary register\n", self->dv_xname);
if (bus_space_map(iot, pa->pa_podule->easi_base +
rapide_info[ra->ra_channel].data_register, 4, 0, &data_ioh))
panic("%s: Cannot map data register\n", self->dv_xname);
if (bus_space_map(iot, pa->pa_podule->easi_base +
CONTROL_REGISTERS_OFFSET, CONTROL_REGISTER_SPACE, 0, &ctl_ioh))
panic("%s: Cannot map control registers\n", self->dv_xname);
wdc->sc_ioh = ioh;
wdc->sc_aux_ioh = aux_ioh;
wdc->sc_ctl_ioh = ctl_ioh;
wdc->sc_data_ioh = data_ioh;
wdc->sc_wdc.sc_flags = WDCF_32BIT; /* flag 32 bit data xfers */
/* Disable interrupts and clear any pending interrupts */
sc->sc_intr_enable_mask &= ~wdc->sc_irqmask;
bus_space_write_1(iot, ctl_ioh, IRQ_MASK_REGISTER_OFFSET,
sc->sc_intr_enable_mask);
/* XXX - Issue 1 cards will need to clear any pending interrupts */
wdcattach_internal((struct wdc_softc *)wdc, iot, ioh, aux_ioh, ioh, data_ioh, -1);
wdc->sc_ih.ih_func = wdc_rapide_intr;
wdc->sc_ih.ih_arg = wdc;
wdc->sc_ih.ih_level = IPL_BIO;
wdc->sc_ih.ih_name = "rapide";
wdc->sc_ih.ih_maskaddr = wdc->sc_podule->irq_addr;
wdc->sc_ih.ih_maskbits = wdc->sc_irqmask;
if (irq_claim(sc->sc_podule->interrupt, &wdc->sc_ih))
panic("Cannot claim IRQ %d for %s\n", IRQ_PODULE, self->dv_xname);
/* clear any pending interrupts and enable interrupts */
sc->sc_intr_enable_mask |= wdc->sc_irqmask;
bus_space_write_1(iot, ctl_ioh, IRQ_MASK_REGISTER_OFFSET,
sc->sc_intr_enable_mask);
/* XXX - Issue 1 cards will need to clear any pending interrupts */
}
/*
* Podule interrupt handler
*
* If the interrupt was from our card pass it on to the wdc interrupt handler
*/
int
wdc_rapide_intr(arg)
void *arg;
{
struct rapwdc_softc *wdc = arg;
/* XXX - Issue 1 cards will need to clear the interrupt */
if (ReadByte(wdc->sc_ih.ih_maskaddr) & wdc->sc_ih.ih_maskbits)
wdcintr(arg);
return(0);
}
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