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