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

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/* $NetBSD: podulebus.c,v 1.20 1997/01/28 04:21:02 mark Exp $ */
/*
* Copyright (c) 1994-1996 Mark Brinicombe.
* Copyright (c) 1994 Brini.
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Brini.
* 4. The name of the company nor the name of the author may be used to
* endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY BRINI ``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 BRINI 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.
*
* RiscBSD kernel project
*
* podulebus.c
*
* Podule probe and configuration routines
*
* Created : 07/11/94
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/conf.h>
#include <sys/malloc.h>
#include <sys/device.h>
#include <machine/io.h>
#include <machine/iomd.h>
#include <machine/katelib.h>
#include <machine/irqhandler.h>
#include <arm32/podulebus/podulebus.h>
#include <arm32/podulebus/podules.h>
#include <arm32/podulebus/podule_data.h>
/* Array of podule structures, one per possible podule */
podule_t podules[MAX_PODULES + MAX_NETSLOTS];
irqhandler_t poduleirq;
extern u_int actual_mask;
extern irqhandler_t *irqhandlers[NIRQS];
extern struct bus_space podulebus_bs_tag;
/* Declare prototypes */
void map_section __P((vm_offset_t, vm_offset_t, vm_offset_t));
int poduleirqhandler __P((void *arg));
u_int poduleread __P((u_int address, int offset, int slottype));
/*
* int podulebusmatch(struct device *parent, void *match, void *aux)
*
* Probe for the podule bus. Currently all this does is return 1 to
* indicate that the podule bus was found.
*/
int
podulebusmatch(parent, match, aux)
struct device *parent;
void *match;
void *aux;
{
switch (IOMD_ID) {
case RPC600_IOMD_ID:
case ARM7500_IOC_ID:
return(1);
}
return (0);
}
int
podulebusprint(aux, name)
void *aux;
const char *name;
{
struct podule_attach_args *pa = aux;
if (name) {
printf("podule%d: ", pa->pa_podule_number);
return(UNCONF);
}
if (pa->pa_podule->slottype == SLOT_POD)
printf(" [ podule %d ]:", pa->pa_podule_number);
else if (pa->pa_podule->slottype == SLOT_NET)
printf(" [ netslot %d ]:", pa->pa_podule_number - MAX_PODULES);
else
panic("Invalid slot type\n");
/* XXXX print flags */
return (QUIET);
}
int
podulebussubmatch(parent, match, aux)
struct device *parent;
void *match;
void *aux;
{
struct cfdata *cf = match;
struct podule_attach_args *pa = aux;
/* Return priority 0 or 1 for wildcarded podule */
if (cf->cf_loc[0] == -1)
return((*cf->cf_attach->ca_match)(parent, match, aux));
/* Return higher priority if we match the specific podule */
else if (cf->cf_loc[0] == pa->pa_podule_number)
return((*cf->cf_attach->ca_match)(parent, match, aux) * 8);
/* Fail */
return(0);
}
#if 0
void
dump_podule(podule)
podule_t *podule;
{
printf("podule%d: ", podule->podulenum);
printf("flags0=%02x ", podule->flags0);
printf("flags1=%02x ", podule->flags1);
printf("reserved=%02x ", podule->reserved);
printf("product=%02x ", podule->product);
printf("manufacturer=%02x ", podule->manufacturer);
printf("country=%02x ", podule->country);
printf("irq_addr=%08x ", podule->irq_addr);
printf("irq_mask=%02x ", podule->irq_mask);
printf("fiq_addr=%08x ", podule->fiq_addr);
printf("fiq_mask=%02x ", podule->fiq_mask);
printf("fast_base=%08x ", podule->fast_base);
printf("medium_base=%08x ", podule->medium_base);
printf("slow_base=%08x ", podule->slow_base);
printf("sync_base=%08x ", podule->sync_base);
printf("mod_base=%08x ", podule->mod_base);
printf("easi_base=%08x ", podule->easi_base);
printf("attached=%d ", podule->attached);
printf("slottype=%d ", podule->slottype);
printf("podulenum=%d ", podule->podulenum);
printf("description=%s ", podule->description);
printf("\n");
}
#endif
void
podulechunkdirectory(podule)
podule_t *podule;
{
u_int address;
u_int id;
u_int size;
u_int addr;
int loop;
int done_f5;
done_f5 = 0;
address = 0x40;
do {
id = poduleread(podule->sync_base, address, podule->slottype);
size = poduleread(podule->sync_base, address + 4, podule->slottype);
size |= (poduleread(podule->sync_base, address + 8, podule->slottype) << 8);
size |= (poduleread(podule->sync_base, address + 12, podule->slottype) << 16);
if (id == 0xf5) {
addr = poduleread(podule->sync_base, address + 16, podule->slottype);
addr |= (poduleread(podule->sync_base, address + 20, podule->slottype) << 8);
addr |= (poduleread(podule->sync_base, address + 24, podule->slottype) << 16);
addr |= (poduleread(podule->sync_base, address + 28, podule->slottype) << 24);
if (addr < 0x800 && done_f5 == 0) {
done_f5 = 1;
for (loop = 0; loop < size; ++loop) {
if (loop < PODULE_DESCRIPTION_LENGTH) {
podule->description[loop] =
poduleread(podule->sync_base, (addr + loop)*4, podule->slottype);
podule->description[loop + 1] = 0;
}
}
}
}
#ifdef DEBUG_CHUNK_DIR
if (id == 0xf5 || id == 0xf1 || id == 0xf2 || id == 0xf3 || id == 0xf4 || id == 0xf6) {
addr = poduleread(podule->sync_base, address + 16, podule->slottype);
addr |= (poduleread(podule->sync_base, address + 20, podule->slottype) << 8);
addr |= (poduleread(podule->sync_base, address + 24, podule->slottype) << 16);
addr |= (poduleread(podule->sync_base, address + 28, podule->slottype) << 24);
printf("<%04x.%04x.%04x.%04x>", id, address, addr, size);
if (addr < 0x800) {
for (loop = 0; loop < size; ++loop) {
printf("%c", poduleread(podule->sync_base, (addr + loop)*4, podule->slottype));
}
printf("\\n\n");
}
}
#endif
address += 32;
} while (id != 0 && address < 0x800);
}
void
poduleexamine(podule, dev, slottype)
podule_t *podule;
struct device *dev;
int slottype;
{
struct podule_list *pod_list;
struct podule_description *pod_desc;
/* Test to see if the podule is present */
if ((podule->flags0 & 0x02) == 0x00) {
podule->slottype = slottype;
if (slottype == SLOT_NET)
printf("netslot%d at %s : ", podule->podulenum - MAX_PODULES,
dev->dv_xname);
else
printf("podule%d at %s : ", podule->podulenum,
dev->dv_xname);
/* Is it Acorn conformant ? */
if (podule->flags0 & 0x80)
printf("Non-Acorn conformant expansion card\n");
else {
int id;
/* Is it a simple podule ? */
id = (podule->flags0 >> 3) & 0x0f;
if (id != 0)
printf("Simple expansion card <%x>\n", id);
else {
/* Scan the chunk directory if present for tags we use */
if (podule->flags1 & PODULE_FLAGS_CD)
podulechunkdirectory(podule);
/* Do we know this manufacturer ? */
pod_list = known_podules;
while (pod_list->description) {
if (pod_list->manufacturer_id == podule->manufacturer)
break;
++pod_list;
}
if (!pod_list->description)
printf("man=%04x : ", podule->manufacturer);
else
printf("%10s : ", pod_list->description);
/* Do we know this product ? */
pod_desc = pod_list->products;
while (pod_desc->description) {
if (pod_desc->product_id == podule->product)
break;
++pod_desc;
}
if (!pod_desc->description) {
printf("prod=%04x : ", podule->product);
printf("%s\n", podule->description);
} else
printf("%s : %s\n", pod_desc->description, podule->description);
}
}
}
}
u_int
poduleread(address, offset, slottype)
u_int address;
int offset;
int slottype;
{
static int netslotoffset = -1;
if (slottype == SLOT_NET) {
if (netslotoffset == -1) {
netslotoffset = 0;
WriteByte(address, 0x00);
}
offset = offset >> 2;
if (offset < netslotoffset) {
WriteByte(address, 0);
netslotoffset = 0;
}
while (netslotoffset < offset) {
slottype = ReadByte(address);
++netslotoffset;
}
++netslotoffset;
return(ReadByte(address));
}
return(ReadByte(address + offset));
}
void
podulescan(dev)
struct device *dev;
{
int loop;
podule_t *podule;
u_char *address;
u_int offset = 0;
/* Loop round all the podules */
for (loop = 0; loop < MAX_PODULES; ++loop, offset += SIMPLE_PODULE_SIZE) {
podule = &podules[loop];
podule->podulenum = loop;
podule->attached = 0;
podule->slottype = SLOT_NONE;
podule->dma_channel = -1;
podule->description[0] = 0;
if (loop == 4) offset += PODULE_GAP;
address = ((u_char *)SYNC_PODULE_BASE) + offset;
if ((address[0] & 0x02) == 0x00) {
podule->fast_base = FAST_PODULE_BASE + offset;
podule->medium_base = MEDIUM_PODULE_BASE + offset;
podule->slow_base = SLOW_PODULE_BASE + offset;
podule->sync_base = SYNC_PODULE_BASE + offset;
podule->mod_base = MOD_PODULE_BASE + offset;
podule->easi_base = EASI_BASE + loop * EASI_SIZE;
} else {
address = ((u_char *)EASI_BASE) + loop * EASI_SIZE;
if ((address[0] & 0x02) != 0x00)
continue;
podule->fast_base = 0;
podule->medium_base = 0;
podule->slow_base = 0;
podule->sync_base = 0;
podule->mod_base = 0;
podule->easi_base = EASI_BASE + loop * EASI_SIZE;
}
/* XXX - Really needs to be linked to a DMA manager */
if (IOMD_ID == RPC600_IOMD_ID) {
switch (loop) {
case 0:
podule->dma_channel = 2;
break;
case 1:
podule->dma_channel = 3;
break;
}
}
/* Get information from the podule header */
podule->flags0 = address[0];
if ((podule->flags0 & 0x78) == 0) {
podule->flags1 = address[4];
podule->reserved = address[8];
podule->product = address[12] + (address[16] << 8);
podule->manufacturer = address[20] + (address[24] << 8);
podule->country = address[28];
if (podule->flags1 & PODULE_FLAGS_IS) {
podule->irq_addr = address[52] + (address[56] << 8) + (address[60] << 16);
podule->irq_addr += podule->slow_base;
podule->irq_mask = address[48];
if (podule->irq_mask == 0)
podule->irq_mask = 0x01;
podule->fiq_addr = address[36] + (address[40] << 8) + (address[44] << 16);
podule->fiq_addr += podule->slow_base;
podule->fiq_mask = address[32];
if (podule->fiq_mask == 0)
podule->fiq_mask = 0x04;
} else {
podule->irq_addr = podule->slow_base;
podule->irq_mask = 0x01;
podule->fiq_addr = podule->slow_base;
podule->fiq_mask = 0x04;
}
}
poduleexamine(podule, dev, SLOT_POD);
}
}
void
netslotscan(dev)
struct device *dev;
{
podule_t *podule;
volatile u_char *address;
/* Only one netslot atm */
/* Reset the address counter */
WriteByte(NETSLOT_BASE, 0x00);
address = (u_char *)NETSLOT_BASE;
podule = &podules[MAX_PODULES];
podule->fast_base = NETSLOT_BASE;
podule->medium_base = NETSLOT_BASE;
podule->slow_base = NETSLOT_BASE;
podule->sync_base = NETSLOT_BASE;
podule->mod_base = NETSLOT_BASE;
podule->easi_base = 0;
podule->attached = 0;
podule->slottype = SLOT_NONE;
podule->podulenum = MAX_PODULES;
podule->dma_channel = -1;
podule->description[0] = 0;
/* XXX - Really needs to be linked to a DMA manager */
if (IOMD_ID == RPC600_IOMD_ID)
podule->dma_channel = 0;
/* Get information from the podule header */
podule->flags0 = *address;
podule->flags1 = *address;
podule->reserved = *address;
podule->product = *address + (*address << 8);
podule->manufacturer = *address + (*address << 8);
podule->country = *address;
if (podule->flags1 & PODULE_FLAGS_IS) {
podule->irq_mask = *address;
podule->irq_addr = *address + (*address << 8) + (*address << 16);
podule->irq_addr += podule->slow_base;
if (podule->irq_mask == 0)
podule->irq_mask = 0x01;
podule->fiq_mask = *address;
podule->fiq_addr = *address + (*address << 8) + (*address << 16);
podule->fiq_addr += podule->slow_base;
if (podule->fiq_mask == 0)
podule->fiq_mask = 0x04;
} else {
podule->irq_addr = podule->slow_base;
podule->irq_mask = 0x01;
podule->fiq_addr = podule->slow_base;
podule->fiq_mask = 0x04;
}
poduleexamine(podule, dev, SLOT_NET);
}
/*
* void podulebusattach(struct device *parent, struct device *dev, void *aux)
*
* Attach podulebus.
* This probes all the podules and sets up the podules array with
* information found in the podule headers.
* After identifing all the podules, all the children of the podulebus
* are probed and attached.
*/
void
podulebusattach(parent, self, aux)
struct device *parent;
struct device *self;
void *aux;
{
int loop;
struct podule_attach_args pa;
int easi_time;
int bit;
easi_time = ReadByte(IOMD_ECTCR);
printf(": easi timings=");
for (bit = 0x01; bit < 0x100; bit = bit << 1)
if (easi_time & bit)
printf("C");
else
printf("A");
printf("\n");
/* Ok we need to map in the podulebus */
/* Map the FAST and SYNC simple podules */
map_section(PAGE_DIRS_BASE, SYNC_PODULE_BASE & 0xfff00000,
SYNC_PODULE_HW_BASE & 0xfff00000);
tlb_flush();
/* Now map the EASI space */
for (loop = 0; loop < MAX_PODULES; ++loop) {
int loop1;
for (loop1 = loop * EASI_SIZE; loop1 < ((loop + 1) * EASI_SIZE); loop1 += (1 << 20))
map_section(PAGE_DIRS_BASE, EASI_BASE + loop1, EASI_HW_BASE + loop1);
}
tlb_flush();
/*
* The MEDIUM and SLOW simple podules and the module space will have been
* mapped when the IOMD and COMBO we mapped in for the RPC
*/
/* Install an podule IRQ handler */
poduleirq.ih_func = poduleirqhandler;
poduleirq.ih_arg = NULL;
poduleirq.ih_level = IPL_NONE;
poduleirq.ih_name = "podule";
/*
if (irq_claim(IRQ_PODULE, &poduleirq))
panic("Cannot claim IRQ %d for podulebus%d\n", IRQ_PODULE, parent->dv_unit);
*/
/* Find out what hardware is bolted on */
podulescan(self);
netslotscan(self);
/* Look for drivers to attach */
for (loop = 0; loop < MAX_PODULES+MAX_NETSLOTS; ++loop)
if (podules[loop].slottype != SLOT_NONE) {
pa.pa_podule_number = loop;
pa.pa_podule = &podules[loop];
pa.pa_iot = &podulebus_bs_tag;
config_found_sm(self, &pa, podulebusprint, podulebussubmatch);
}
}
/*
* int podule_irqhandler(void *arg)
*
* text irq handler to service expansion card IRQ's
*
* There is currently a problem here.
* The spl_mask may mask out certain expansion card IRQ's e.g. SCSI
* but allow others e.g. Ethernet.
*/
int
poduleirqhandler(arg)
void *arg;
{
int loop;
irqhandler_t *handler;
printf("eek ! Unknown podule IRQ received - Blocking all podule interrupts\n");
disable_irq(IRQ_PODULE);
/* return(1);*/
/* Loop round the expansion card handlers */
for (loop = IRQ_EXPCARD0; loop <= IRQ_EXPCARD7; ++loop) {
/* Is the IRQ currently allowable */
if (actual_mask & (1 << loop)) {
handler = irqhandlers[loop];
if (handler && handler->ih_maskaddr) {
if (ReadByte(handler->ih_maskaddr) & handler->ih_maskbits)
handler->ih_func(handler->ih_arg);
}
}
}
return(1);
}
struct cfattach podulebus_ca = {
sizeof(struct device), podulebusmatch, podulebusattach
};
struct cfdriver podulebus_cd = {
NULL, "podulebus", DV_DULL, 0
};
/* Useful functions that drivers may share */
/*
* Match a podule structure with the specified parameters
* Returns 0 if the match failed
* The required_slot is not used at the moment.
*/
int
matchpodule(pa, manufacturer, product, required_slot)
struct podule_attach_args *pa;
int manufacturer;
int product;
int required_slot;
{
if (pa->pa_podule->attached)
panic("podulebus: Podule already attached\n");
if (pa->pa_podule->manufacturer == manufacturer
&& pa->pa_podule->product == product)
return(1);
return(0);
}
/* End of podulebus.c */
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