/* $Id: ebus.c,v 1.20 2002/01/05 01:13:43 davem Exp $
* 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/config.h>
#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/bpp.h>
struct linux_ebus *ebus_chain = 0;
/* We are together with pcic.c under CONFIG_PCI. */
extern unsigned int pcic_pin_to_irq(unsigned int, 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 },
{ 0, 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 },
{ 0, 0 }
};
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(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(int node, struct linux_prom_registers *preg,
struct linux_ebus_child *dev)
{
int regs[PROMREG_MAX];
int irqs[PROMREG_MAX];
char lbuf[128];
int i, len;
dev->prom_node = node;
prom_getstring(node, "name", lbuf, sizeof(lbuf));
strcpy(dev->prom_name, lbuf);
len = prom_getproperty(node, "reg", (void *)regs, sizeof(regs));
if (len == -1) 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_name, len, dev->parent->num_addrs);
panic(__FUNCTION__);
}
dev->resource[i].start = dev->parent->resource[regs[i]].start; /* XXX resource */
}
for (i = 0; i < PROMINTR_MAX; i++)
dev->irqs[i] = PCI_IRQ_NONE;
if ((dev->irqs[0] = ebus_blacklist_irq(dev->prom_name)) != 0) {
dev->num_irqs = 1;
} else if ((len = prom_getproperty(node, "interrupts",
(char *)&irqs, sizeof(irqs))) == -1 || len == 0) {
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];
/* P3 */ /* printk("EBUS: dev %s irq %d from parent\n", dev->prom_name, dev->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_name, irqs[0]);
dev->num_irqs = 0;
dev->irqs[0] = 0;
} else {
dev->irqs[0] = pcic_pin_to_irq(irqs[0], dev->prom_name);
}
}
}
void __init fill_ebus_device(int node, struct linux_ebus_device *dev)
{
struct linux_prom_registers regs[PROMREG_MAX];
struct linux_ebus_child *child;
int irqs[PROMINTR_MAX];
char lbuf[128];
int i, n, len;
unsigned long baseaddr;
dev->prom_node = node;
prom_getstring(node, "name", lbuf, sizeof(lbuf));
strcpy(dev->prom_name, lbuf);
len = prom_getproperty(node, "reg", (void *)regs, sizeof(regs));
if (len % sizeof(struct linux_prom_registers)) {
prom_printf("UGH: proplen for %s was %d, need multiple of %d\n",
dev->prom_name, len,
(int)sizeof(struct linux_prom_registers));
panic(__FUNCTION__);
}
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_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_name)) != 0) {
dev->num_irqs = 1;
} else if ((len = prom_getproperty(node, "interrupts",
(char *)&irqs, sizeof(irqs))) == -1 || len == 0) {
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_name, irqs[0]);
dev->num_irqs = 0;
dev->irqs[0] = 0;
} else {
dev->irqs[0] = pcic_pin_to_irq(irqs[0], dev->prom_name);
}
}
if ((node = prom_getchild(node))) {
dev->children = (struct linux_ebus_child *)
ebus_alloc(sizeof(struct linux_ebus_child));
child = dev->children;
child->next = 0;
child->parent = dev;
child->bus = dev->bus;
fill_ebus_child(node, ®s[0], child);
while ((node = prom_getsibling(node)) != 0) {
child->next = (struct linux_ebus_child *)
ebus_alloc(sizeof(struct linux_ebus_child));
child = child->next;
child->next = 0;
child->parent = dev;
child->bus = dev->bus;
fill_ebus_child(node, ®s[0], child);
}
}
}
void __init ebus_init(void)
{
struct linux_prom_pci_registers regs[PROMREG_MAX];
struct linux_pbm_info *pbm;
struct linux_ebus_device *dev;
struct linux_ebus *ebus;
struct ebus_system_entry *sp;
struct pci_dev *pdev;
struct pcidev_cookie *cookie;
char lbuf[128];
unsigned long addr, *base;
unsigned short pci_command;
int nd, len, ebusnd;
int reg, nreg;
int num_ebus = 0;
prom_getstring(prom_root_node, "name", lbuf, sizeof(lbuf));
for (sp = ebus_blacklist; sp->esname != NULL; sp++) {
if (strcmp(lbuf, sp->esname) == 0) {
ebus_blackp = sp->ipt;
break;
}
}
pdev = pci_get_device(PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_EBUS, 0);
if (!pdev) {
return;
}
cookie = pdev->sysdata;
ebusnd = cookie->prom_node;
ebus_chain = ebus = (struct linux_ebus *)
ebus_alloc(sizeof(struct linux_ebus));
ebus->next = 0;
while (ebusnd) {
prom_getstring(ebusnd, "name", lbuf, sizeof(lbuf));
ebus->prom_node = ebusnd;
strcpy(ebus->prom_name, lbuf);
ebus->self = pdev;
ebus->parent = pbm = cookie->pbm;
/* Enable BUS Master. */
pci_read_config_word(pdev, PCI_COMMAND, &pci_command);
pci_command |= PCI_COMMAND_MASTER;
pci_write_config_word(pdev, PCI_COMMAND, pci_command);
len = prom_getproperty(ebusnd, "reg", (void *)regs,
sizeof(regs));
if (len == 0 || len == -1) {
prom_printf("%s: can't find reg property\n",
__FUNCTION__);
prom_halt();
}
nreg = len / sizeof(struct linux_prom_pci_registers);
base = &ebus->self->resource[0].start;
for (reg = 0; reg < nreg; reg++) {
if (!(regs[reg].which_io & 0x03000000))
continue;
addr = regs[reg].phys_lo;
*base++ = addr;
}
nd = prom_getchild(ebusnd);
if (!nd)
goto next_ebus;
ebus->devices = (struct linux_ebus_device *)
ebus_alloc(sizeof(struct linux_ebus_device));
dev = ebus->devices;
dev->next = 0;
dev->children = 0;
dev->bus = ebus;
fill_ebus_device(nd, dev);
while ((nd = prom_getsibling(nd)) != 0) {
dev->next = (struct linux_ebus_device *)
ebus_alloc(sizeof(struct linux_ebus_device));
dev = dev->next;
dev->next = 0;
dev->children = 0;
dev->bus = ebus;
fill_ebus_device(nd, dev);
}
next_ebus:
pdev = pci_get_device(PCI_VENDOR_ID_SUN,
PCI_DEVICE_ID_SUN_EBUS, pdev);
if (!pdev)
break;
cookie = pdev->sysdata;
ebusnd = cookie->prom_node;
ebus->next = (struct linux_ebus *)
ebus_alloc(sizeof(struct linux_ebus));
ebus = ebus->next;
ebus->next = 0;
++num_ebus;
}
if (pdev)
pci_dev_put(pdev);
}
