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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.
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/malloc.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>
#undef PROM_DEBUG
#undef DEBUG_FILL_EBUS_DEV
#ifdef PROM_DEBUG
#define dprintf prom_printf
#else
#define dprintf printk
#endif
struct linux_ebus *ebus_chain = 0;
#ifdef CONFIG_SUN_OPENPROMIO
extern int openprom_init(void);
#endif
#ifdef CONFIG_SPARCAUDIO
extern int sparcaudio_init(void);
#endif
#ifdef CONFIG_SUN_AUXIO
extern void auxio_probe(void);
#endif
#ifdef CONFIG_OBP_FLASH
extern int flash_init(void);
#endif
#ifdef CONFIG_ENVCTRL
extern int envctrl_init(void);
#endif
static inline unsigned long ebus_alloc(size_t size)
{
return (unsigned long)kmalloc(size, GFP_ATOMIC);
}
__initfunc(void 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));
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->base_address[i] = dev->parent->base_address[regs[i]];
}
len = prom_getproperty(node, "interrupts", (char *)&irqs, sizeof(irqs));
if ((len == -1) || (len == 0)) {
dev->num_irqs = 0;
/*
* Oh, well, some PROMs don't export interrupts
* property to children of EBus devices...
*
* Be smart about PS/2 keyboard and mouse.
*/
if (!strcmp(dev->parent->prom_name, "8042")) {
dev->num_irqs = 1;
dev->irqs[0] = dev->parent->irqs[0];
}
} else {
dev->num_irqs = len / sizeof(irqs[0]);
printk("FIXME: %s irq(%d)\n", dev->prom_name, irqs[0]);
}
#ifdef DEBUG_FILL_EBUS_DEV
dprintk("child '%s': address%s\n", dev->prom_name,
dev->num_addrs > 1 ? "es" : "");
for (i = 0; i < dev->num_addrs; i++)
dprintk(" %016lx\n", dev->base_address[i]);
if (dev->num_irqs) {
dprintk(" IRQ%s", dev->num_irqs > 1 ? "s" : "");
for (i = 0; i < dev->num_irqs; i++)
dprintk(" %08x", dev->irqs[i]);
dprintk("\n");
}
#endif
}
__initfunc(void 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;
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++) {
n = (regs[i].which_io - 0x10) >> 2;
dev->base_address[i] = dev->bus->self->base_address[n];
dev->base_address[i] += regs[i].phys_addr;
if (dev->base_address[i]) {
dev->base_address[i] =
(unsigned long)sparc_alloc_io (dev->base_address[i], 0,
regs[i].reg_size,
dev->prom_name, 0, 0);
/* Some drivers call 'check_region', so we release it */
release_region(dev->base_address[i] & PAGE_MASK, PAGE_SIZE);
if (dev->base_address[i] == 0 ) {
panic("ebus: unable sparc_alloc_io for dev %s",
dev->prom_name);
}
}
}
len = prom_getproperty(node, "interrupts", (char *)&irqs, sizeof(irqs));
if ((len == -1) || (len == 0)) {
dev->num_irqs = 0;
} else {
dev->num_irqs = len / sizeof(irqs[0]);
#define IRQ_8042 7
if (irqs[0] == 4) dev->irqs[0] = IRQ_8042;
printk("FIXME: %s irq(%d)\n", dev->prom_name, irqs[0]);
}
#ifdef DEBUG_FILL_EBUS_DEV
dprintk("'%s': address%s\n", dev->prom_name,
dev->num_addrs > 1 ? "es" : "");
for (i = 0; i < dev->num_addrs; i++)
dprintk(" %016lx\n", dev->base_address[i]);
if (dev->num_irqs) {
dprintk(" IRQ%s", dev->num_irqs > 1 ? "s" : "");
for (i = 0; i < dev->num_irqs; i++)
dprintk(" %08x", dev->irqs[i]);
dprintk("\n");
}
#endif
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))) {
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);
}
}
}
__initfunc(void 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 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;
if (!pci_present())
return;
pdev = pci_find_device(PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_EBUS, 0);
if (!pdev) {
#ifdef PROM_DEBUG
dprintk("ebus: No EBus's found.\n");
#endif
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) {
#ifdef PROM_DEBUG
dprintk("ebus%d:", num_ebus);
#endif
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->base_address[0];
for (reg = 0; reg < nreg; reg++) {
if (!(regs[reg].which_io & 0x03000000))
continue;
addr = regs[reg].phys_lo;
*base++ = addr;
#ifdef PROM_DEBUG
dprintk(" %lx[%x]", addr, regs[reg].size_lo);
#endif
}
#ifdef PROM_DEBUG
dprintk("\n");
#endif
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))) {
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_find_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;
}
#ifdef CONFIG_SUN_OPENPROMIO
openprom_init();
#endif
#ifdef CONFIG_SPARCAUDIO
sparcaudio_init();
#endif
#ifdef CONFIG_SUN_BPP
bpp_init();
#endif
#ifdef CONFIG_SUN_AUXIO
auxio_probe();
#endif
#ifdef CONFIG_ENVCTRL
envctrl_init();
#endif
#ifdef CONFIG_OBP_FLASH
flash_init();
#endif
}
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