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/*
* ebus.c: PCI to EBus bridge device.
*
* Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
*
* Adopted for sparc by V. Roganov and G. Raiko.
* Fixes for different platforms by Pete Zaitcev.
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <asm/system.h>
#include <asm/page.h>
#include <asm/pbm.h>
#include <asm/ebus.h>
#include <asm/io.h>
#include <asm/oplib.h>
#include <asm/prom.h>
#include <asm/bpp.h>
struct linux_ebus *ebus_chain = NULL;
/* We are together with pcic.c under CONFIG_PCI. */
extern unsigned int pcic_pin_to_irq(unsigned int, const char *name);
/*
* IRQ Blacklist
* Here we list PROMs and systems that are known to supply crap as IRQ numbers.
*/
struct ebus_device_irq {
char *name;
unsigned int pin;
};
struct ebus_system_entry {
char *esname;
struct ebus_device_irq *ipt;
};
static struct ebus_device_irq je1_1[] = {
{ "8042", 3 },
{ "SUNW,CS4231", 0 },
{ "parallel", 0 },
{ "se", 2 },
{ NULL, 0 }
};
/*
* Gleb's JE1 supplied reasonable pin numbers, but mine did not (OBP 2.32).
* Blacklist the sucker... Note that Gleb's system will work.
*/
static struct ebus_system_entry ebus_blacklist[] = {
{ "SUNW,JavaEngine1", je1_1 },
{ NULL, NULL }
};
static struct ebus_device_irq *ebus_blackp = NULL;
/*
*/
static inline unsigned long ebus_alloc(size_t size)
{
return (unsigned long)kmalloc(size, GFP_ATOMIC);
}
/*
*/
int __init ebus_blacklist_irq(const char *name)
{
struct ebus_device_irq *dp;
if ((dp = ebus_blackp) != NULL) {
for (; dp->name != NULL; dp++) {
if (strcmp(name, dp->name) == 0) {
return pcic_pin_to_irq(dp->pin, name);
}
}
}
return 0;
}
void __init fill_ebus_child(struct device_node *dp,
struct linux_ebus_child *dev)
{
const int *regs;
const int *irqs;
int i, len;
dev->prom_node = dp;
regs = of_get_property(dp, "reg", &len);
if (!regs)
len = 0;
dev->num_addrs = len / sizeof(regs[0]);
for (i = 0; i < dev->num_addrs; i++) {
if (regs[i] >= dev->parent->num_addrs) {
prom_printf("UGH: property for %s was %d, need < %d\n",
dev->prom_node->name, len,
dev->parent->num_addrs);
panic(__func__);
}
/* XXX resource */
dev->resource[i].start =
dev->parent->resource[regs[i]].start;
}
for (i = 0; i < PROMINTR_MAX; i++)
dev->irqs[i] = PCI_IRQ_NONE;
if ((dev->irqs[0] = ebus_blacklist_irq(dev->prom_node->name)) != 0) {
dev->num_irqs = 1;
} else {
irqs = of_get_property(dp, "interrupts", &len);
if (!irqs) {
dev->num_irqs = 0;
dev->irqs[0] = 0;
if (dev->parent->num_irqs != 0) {
dev->num_irqs = 1;
dev->irqs[0] = dev->parent->irqs[0];
}
} else {
dev->num_irqs = len / sizeof(irqs[0]);
if (irqs[0] == 0 || irqs[0] >= 8) {
/*
* XXX Zero is a valid pin number...
* This works as long as Ebus is not wired
* to INTA#.
*/
printk("EBUS: %s got bad irq %d from PROM\n",
dev->prom_node->name, irqs[0]);
dev->num_irqs = 0;
dev->irqs[0] = 0;
} else {
dev->irqs[0] =
pcic_pin_to_irq(irqs[0],
dev->prom_node->name);
}
}
}
}
void __init fill_ebus_device(struct device_node *dp, struct linux_ebus_device *dev)
{
const struct linux_prom_registers *regs;
struct linux_ebus_child *child;
struct dev_archdata *sd;
const int *irqs;
int i, n, len;
unsigned long baseaddr;
dev->prom_node = dp;
regs = of_get_property(dp, "reg", &len);
if (!regs)
len = 0;
if (len % sizeof(struct linux_prom_registers)) {
prom_printf("UGH: proplen for %s was %d, need multiple of %d\n",
dev->prom_node->name, len,
(int)sizeof(struct linux_prom_registers));
panic(__func__);
}
dev->num_addrs = len / sizeof(struct linux_prom_registers);
for (i = 0; i < dev->num_addrs; i++) {
/*
* XXX Collect JE-1 PROM
*
* Example - JS-E with 3.11:
* /ebus
* regs
* 0x00000000, 0x0, 0x00000000, 0x0, 0x00000000,
* 0x82000010, 0x0, 0xf0000000, 0x0, 0x01000000,
* 0x82000014, 0x0, 0x38800000, 0x0, 0x00800000,
* ranges
* 0x00, 0x00000000, 0x02000010, 0x0, 0x0, 0x01000000,
* 0x01, 0x01000000, 0x02000014, 0x0, 0x0, 0x00800000,
* /ebus/8042
* regs
* 0x00000001, 0x00300060, 0x00000008,
* 0x00000001, 0x00300060, 0x00000008,
*/
n = regs[i].which_io;
if (n >= 4) {
/* XXX This is copied from old JE-1 by Gleb. */
n = (regs[i].which_io - 0x10) >> 2;
} else {
;
}
/*
* XXX Now as we have regions, why don't we make an on-demand allocation...
*/
dev->resource[i].start = 0;
if ((baseaddr = dev->bus->self->resource[n].start +
regs[i].phys_addr) != 0) {
/* dev->resource[i].name = dev->prom_name; */
if ((baseaddr = (unsigned long) ioremap(baseaddr,
regs[i].reg_size)) == 0) {
panic("ebus: unable to remap dev %s",
dev->prom_node->name);
}
}
dev->resource[i].start = baseaddr; /* XXX Unaligned */
}
for (i = 0; i < PROMINTR_MAX; i++)
dev->irqs[i] = PCI_IRQ_NONE;
if ((dev->irqs[0] = ebus_blacklist_irq(dev->prom_node->name)) != 0) {
dev->num_irqs = 1;
} else {
irqs = of_get_property(dp, "interrupts", &len);
if (!irqs) {
dev->num_irqs = 0;
if ((dev->irqs[0] = dev->bus->self->irq) != 0) {
dev->num_irqs = 1;
/* P3 */ /* printk("EBUS: child %s irq %d from parent\n", dev->prom_name, dev->irqs[0]); */
}
} else {
dev->num_irqs = 1; /* dev->num_irqs = len / sizeof(irqs[0]); */
if (irqs[0] == 0 || irqs[0] >= 8) {
/* See above for the parent. XXX */
printk("EBUS: %s got bad irq %d from PROM\n",
dev->prom_node->name, irqs[0]);
dev->num_irqs = 0;
dev->irqs[0] = 0;
} else {
dev->irqs[0] =
pcic_pin_to_irq(irqs[0],
dev->prom_node->name);
}
}
}
sd = &dev->ofdev.dev.archdata;
sd->prom_node = dp;
sd->op = &dev->ofdev;
sd->iommu = dev->bus->ofdev.dev.parent->archdata.iommu;
dev->ofdev.node = dp;
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