308 lines
7.0 KiB
C
308 lines
7.0 KiB
C
/* sbus.c: SBus support routines.
|
|
*
|
|
* Copyright (C) 1995, 2006 David S. Miller (davem@davemloft.net)
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/init.h>
|
|
#include <linux/device.h>
|
|
|
|
#include <asm/system.h>
|
|
#include <asm/sbus.h>
|
|
#include <asm/dma.h>
|
|
#include <asm/oplib.h>
|
|
#include <asm/prom.h>
|
|
#include <asm/of_device.h>
|
|
#include <asm/bpp.h>
|
|
#include <asm/irq.h>
|
|
|
|
static ssize_t
|
|
show_sbusobppath_attr(struct device * dev, struct device_attribute * attr, char * buf)
|
|
{
|
|
struct sbus_dev *sbus;
|
|
|
|
sbus = to_sbus_device(dev);
|
|
|
|
return snprintf (buf, PAGE_SIZE, "%s\n", sbus->ofdev.node->full_name);
|
|
}
|
|
|
|
static DEVICE_ATTR(obppath, S_IRUSR | S_IRGRP | S_IROTH, show_sbusobppath_attr, NULL);
|
|
|
|
struct sbus_bus *sbus_root;
|
|
|
|
static void __init fill_sbus_device(struct device_node *dp, struct sbus_dev *sdev)
|
|
{
|
|
struct dev_archdata *sd;
|
|
unsigned long base;
|
|
const void *pval;
|
|
int len, err;
|
|
|
|
sdev->prom_node = dp->node;
|
|
strcpy(sdev->prom_name, dp->name);
|
|
|
|
pval = of_get_property(dp, "reg", &len);
|
|
sdev->num_registers = 0;
|
|
if (pval) {
|
|
memcpy(sdev->reg_addrs, pval, len);
|
|
|
|
sdev->num_registers =
|
|
len / sizeof(struct linux_prom_registers);
|
|
|
|
base = (unsigned long) sdev->reg_addrs[0].phys_addr;
|
|
|
|
/* Compute the slot number. */
|
|
if (base >= SUN_SBUS_BVADDR && sparc_cpu_model == sun4m)
|
|
sdev->slot = sbus_dev_slot(base);
|
|
else
|
|
sdev->slot = sdev->reg_addrs[0].which_io;
|
|
}
|
|
|
|
pval = of_get_property(dp, "ranges", &len);
|
|
sdev->num_device_ranges = 0;
|
|
if (pval) {
|
|
memcpy(sdev->device_ranges, pval, len);
|
|
sdev->num_device_ranges =
|
|
len / sizeof(struct linux_prom_ranges);
|
|
}
|
|
|
|
sbus_fill_device_irq(sdev);
|
|
|
|
sd = &sdev->ofdev.dev.archdata;
|
|
sd->prom_node = dp;
|
|
sd->op = &sdev->ofdev;
|
|
|
|
sdev->ofdev.node = dp;
|
|
if (sdev->parent)
|
|
sdev->ofdev.dev.parent = &sdev->parent->ofdev.dev;
|
|
else
|
|
sdev->ofdev.dev.parent = &sdev->bus->ofdev.dev;
|
|
sdev->ofdev.dev.bus = &sbus_bus_type;
|
|
sprintf(sdev->ofdev.dev.bus_id, "sbus[%08x]", dp->node);
|
|
|
|
if (of_device_register(&sdev->ofdev) != 0)
|
|
printk(KERN_DEBUG "sbus: device registration error for %s!\n",
|
|
dp->path_component_name);
|
|
|
|
/* WE HAVE BEEN INVADED BY ALIENS! */
|
|
err = sysfs_create_file(&sdev->ofdev.dev.kobj, &dev_attr_obppath.attr);
|
|
}
|
|
|
|
static void __init sbus_bus_ranges_init(struct device_node *dp, struct sbus_bus *sbus)
|
|
{
|
|
const void *pval;
|
|
int len;
|
|
|
|
pval = of_get_property(dp, "ranges", &len);
|
|
sbus->num_sbus_ranges = 0;
|
|
if (pval) {
|
|
memcpy(sbus->sbus_ranges, pval, len);
|
|
sbus->num_sbus_ranges =
|
|
len / sizeof(struct linux_prom_ranges);
|
|
|
|
sbus_arch_bus_ranges_init(dp->parent, sbus);
|
|
}
|
|
}
|
|
|
|
static void __init __apply_ranges_to_regs(struct linux_prom_ranges *ranges,
|
|
int num_ranges,
|
|
struct linux_prom_registers *regs,
|
|
int num_regs)
|
|
{
|
|
if (num_ranges) {
|
|
int regnum;
|
|
|
|
for (regnum = 0; regnum < num_regs; regnum++) {
|
|
int rngnum;
|
|
|
|
for (rngnum = 0; rngnum < num_ranges; rngnum++) {
|
|
if (regs[regnum].which_io == ranges[rngnum].ot_child_space)
|
|
break;
|
|
}
|
|
if (rngnum == num_ranges) {
|
|
/* We used to flag this as an error. Actually
|
|
* some devices do not report the regs as we expect.
|
|
* For example, see SUNW,pln device. In that case
|
|
* the reg property is in a format internal to that
|
|
* node, ie. it is not in the SBUS register space
|
|
* per se. -DaveM
|
|
*/
|
|
return;
|
|
}
|
|
regs[regnum].which_io = ranges[rngnum].ot_parent_space;
|
|
regs[regnum].phys_addr -= ranges[rngnum].ot_child_base;
|
|
regs[regnum].phys_addr += ranges[rngnum].ot_parent_base;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void __init __fixup_regs_sdev(struct sbus_dev *sdev)
|
|
{
|
|
if (sdev->num_registers != 0) {
|
|
struct sbus_dev *parent = sdev->parent;
|
|
int i;
|
|
|
|
while (parent != NULL) {
|
|
__apply_ranges_to_regs(parent->device_ranges,
|
|
parent->num_device_ranges,
|
|
sdev->reg_addrs,
|
|
sdev->num_registers);
|
|
|
|
parent = parent->parent;
|
|
}
|
|
|
|
__apply_ranges_to_regs(sdev->bus->sbus_ranges,
|
|
sdev->bus->num_sbus_ranges,
|
|
sdev->reg_addrs,
|
|
sdev->num_registers);
|
|
|
|
for (i = 0; i < sdev->num_registers; i++) {
|
|
struct resource *res = &sdev->resource[i];
|
|
|
|
res->start = sdev->reg_addrs[i].phys_addr;
|
|
res->end = (res->start +
|
|
(unsigned long)sdev->reg_addrs[i].reg_size - 1UL);
|
|
res->flags = IORESOURCE_IO |
|
|
(sdev->reg_addrs[i].which_io & 0xff);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void __init sbus_fixup_all_regs(struct sbus_dev *first_sdev)
|
|
{
|
|
struct sbus_dev *sdev;
|
|
|
|
for (sdev = first_sdev; sdev; sdev = sdev->next) {
|
|
if (sdev->child)
|
|
sbus_fixup_all_regs(sdev->child);
|
|
__fixup_regs_sdev(sdev);
|
|
}
|
|
}
|
|
|
|
/* We preserve the "probe order" of these bus and device lists to give
|
|
* the same ordering as the old code.
|
|
*/
|
|
static void __init sbus_insert(struct sbus_bus *sbus, struct sbus_bus **root)
|
|
{
|
|
while (*root)
|
|
root = &(*root)->next;
|
|
*root = sbus;
|
|
sbus->next = NULL;
|
|
}
|
|
|
|
static void __init sdev_insert(struct sbus_dev *sdev, struct sbus_dev **root)
|
|
{
|
|
while (*root)
|
|
root = &(*root)->next;
|
|
*root = sdev;
|
|
sdev->next = NULL;
|
|
}
|
|
|
|
static void __init walk_children(struct device_node *dp, struct sbus_dev *parent, struct sbus_bus *sbus)
|
|
{
|
|
dp = dp->child;
|
|
while (dp) {
|
|
struct sbus_dev *sdev;
|
|
|
|
sdev = kzalloc(sizeof(struct sbus_dev), GFP_ATOMIC);
|
|
if (sdev) {
|
|
sdev_insert(sdev, &parent->child);
|
|
|
|
sdev->bus = sbus;
|
|
sdev->parent = parent;
|
|
|
|
fill_sbus_device(dp, sdev);
|
|
|
|
walk_children(dp, sdev, sbus);
|
|
}
|
|
dp = dp->sibling;
|
|
}
|
|
}
|
|
|
|
static void __init build_one_sbus(struct device_node *dp, int num_sbus)
|
|
{
|
|
struct sbus_bus *sbus;
|
|
unsigned int sbus_clock;
|
|
struct device_node *dev_dp;
|
|
|
|
sbus = kzalloc(sizeof(struct sbus_bus), GFP_ATOMIC);
|
|
if (!sbus)
|
|
return;
|
|
|
|
sbus_insert(sbus, &sbus_root);
|
|
sbus->prom_node = dp->node;
|
|
|
|
sbus_setup_iommu(sbus, dp);
|
|
|
|
printk("sbus%d: ", num_sbus);
|
|
|
|
sbus_clock = of_getintprop_default(dp, "clock-frequency",
|
|
(25*1000*1000));
|
|
sbus->clock_freq = sbus_clock;
|
|
|
|
printk("Clock %d.%d MHz\n", (int) ((sbus_clock/1000)/1000),
|
|
(int) (((sbus_clock/1000)%1000 != 0) ?
|
|
(((sbus_clock/1000)%1000) + 1000) : 0));
|
|
|
|
strcpy(sbus->prom_name, dp->name);
|
|
|
|
sbus_setup_arch_props(sbus, dp);
|
|
|
|
sbus_bus_ranges_init(dp, sbus);
|
|
|
|
sbus->ofdev.node = dp;
|
|
sbus->ofdev.dev.parent = NULL;
|
|
sbus->ofdev.dev.bus = &sbus_bus_type;
|
|
sprintf(sbus->ofdev.dev.bus_id, "sbus%d", num_sbus);
|
|
|
|
if (of_device_register(&sbus->ofdev) != 0)
|
|
printk(KERN_DEBUG "sbus: device registration error for %s!\n",
|
|
sbus->ofdev.dev.bus_id);
|
|
|
|
dev_dp = dp->child;
|
|
while (dev_dp) {
|
|
struct sbus_dev *sdev;
|
|
|
|
sdev = kzalloc(sizeof(struct sbus_dev), GFP_ATOMIC);
|
|
if (sdev) {
|
|
sdev_insert(sdev, &sbus->devices);
|
|
|
|
sdev->bus = sbus;
|
|
sdev->parent = NULL;
|
|
fill_sbus_device(dev_dp, sdev);
|
|
|
|
walk_children(dev_dp, sdev, sbus);
|
|
}
|
|
dev_dp = dev_dp->sibling;
|
|
}
|
|
|
|
sbus_fixup_all_regs(sbus->devices);
|
|
|
|
dvma_init(sbus);
|
|
}
|
|
|
|
static int __init sbus_init(void)
|
|
{
|
|
struct device_node *dp;
|
|
const char *sbus_name = "sbus";
|
|
int num_sbus = 0;
|
|
|
|
if (sbus_arch_preinit())
|
|
return 0;
|
|
|
|
if (sparc_cpu_model == sun4d)
|
|
sbus_name = "sbi";
|
|
|
|
for_each_node_by_name(dp, sbus_name) {
|
|
build_one_sbus(dp, num_sbus);
|
|
num_sbus++;
|
|
|
|
}
|
|
|
|
sbus_arch_postinit();
|
|
|
|
return 0;
|
|
}
|
|
|
|
subsys_initcall(sbus_init);
|