-/*
- * ebus.c: PCI to EBus bridge device.
+/* ebus.c: EBUS DMA library code.
*
* Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
* Copyright (C) 1999 David S. Miller (davem@redhat.com)
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/string.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
-#include <linux/pci.h>
-#include <linux/of_device.h>
-#include <asm/system.h>
-#include <asm/page.h>
-#include <asm/ebus.h>
#include <asm/ebus_dma.h>
-#include <asm/oplib.h>
-#include <asm/prom.h>
-#include <asm/irq.h>
#include <asm/io.h>
-/* EBUS dma library. */
-
#define EBDMA_CSR 0x00UL /* Control/Status */
#define EBDMA_ADDR 0x04UL /* DMA Address */
#define EBDMA_COUNT 0x08UL /* DMA Count */
spin_unlock_irqrestore(&p->lock, flags);
}
EXPORT_SYMBOL(ebus_dma_enable);
-
-struct linux_ebus *ebus_chain = NULL;
-
-static inline void *ebus_alloc(size_t size)
-{
- void *mem;
-
- mem = kzalloc(size, GFP_ATOMIC);
- if (!mem)
- panic("ebus_alloc: out of memory");
- return mem;
-}
-
-static void __init fill_ebus_child(struct device_node *dp,
- struct linux_ebus_child *dev,
- int non_standard_regs)
-{
- struct of_device *op;
- const int *regs;
- int i, len;
-
- dev->prom_node = dp;
- printk(" (%s)", dp->name);
-
- regs = of_get_property(dp, "reg", &len);
- if (!regs)
- dev->num_addrs = 0;
- else
- dev->num_addrs = len / sizeof(regs[0]);
-
- if (non_standard_regs) {
- /* This is to handle reg properties which are not
- * in the parent relative format. One example are
- * children of the i2c device on CompactPCI systems.
- *
- * So, for such devices we just record the property
- * raw in the child resources.
- */
- for (i = 0; i < dev->num_addrs; i++)
- dev->resource[i].start = regs[i];
- } else {
- for (i = 0; i < dev->num_addrs; i++) {
- int rnum = regs[i];
- if (rnum >= dev->parent->num_addrs) {
- prom_printf("UGH: property for %s was %d, need < %d\n",
- dp->name, len, dev->parent->num_addrs);
- prom_halt();
- }
- dev->resource[i].start = dev->parent->resource[i].start;
- dev->resource[i].end = dev->parent->resource[i].end;
- dev->resource[i].flags = IORESOURCE_MEM;
- dev->resource[i].name = dp->name;
- }
- }
-
- op = of_find_device_by_node(dp);
- if (!op) {
- dev->num_irqs = 0;
- } else {
- dev->num_irqs = op->num_irqs;
- for (i = 0; i < dev->num_irqs; i++)
- dev->irqs[i] = op->irqs[i];
- }
-
- if (!dev->num_irqs) {
- /*
- * 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_node->name, "8042")) {
- if (!strcmp(dev->prom_node->name, "kb_ps2")) {
- dev->num_irqs = 1;
- dev->irqs[0] = dev->parent->irqs[0];
- } else {
- dev->num_irqs = 1;
- dev->irqs[0] = dev->parent->irqs[1];
- }
- }
- }
-}
-
-static int __init child_regs_nonstandard(struct linux_ebus_device *dev)
-{
- if (!strcmp(dev->prom_node->name, "i2c") ||
- !strcmp(dev->prom_node->name, "SUNW,lombus"))
- return 1;
- return 0;
-}
-
-static void __init fill_ebus_device(struct device_node *dp, struct linux_ebus_device *dev)
-{
- struct linux_ebus_child *child;
- struct dev_archdata *sd;
- struct of_device *op;
- int i, len;
-
- dev->prom_node = dp;
-
- printk(" [%s", dp->name);
-
- op = of_find_device_by_node(dp);
- if (!op) {
- dev->num_addrs = 0;
- dev->num_irqs = 0;
- } else {
- const int *regs = of_get_property(dp, "reg", &len);
-
- if (!regs)
- len = 0;
- dev->num_addrs = len / sizeof(struct linux_prom_registers);
-
- for (i = 0; i < dev->num_addrs; i++)
- memcpy(&dev->resource[i],
- &op->resource[i],
- sizeof(struct resource));
-
- dev->num_irqs = op->num_irqs;
- for (i = 0; i < dev->num_irqs; i++)
- dev->irqs[i] = op->irqs[i];
- }
-
- sd = &dev->ofdev.dev.archdata;
- sd->prom_node = dp;
- sd->op = &dev->ofdev;
- sd->iommu = dev->bus->ofdev.dev.parent->archdata.iommu;
- sd->stc = dev->bus->ofdev.dev.parent->archdata.stc;
- sd->numa_node = dev->bus->ofdev.dev.parent->archdata.numa_node;
-
- dev->ofdev.node = dp;
- dev->ofdev.dev.parent = &dev->bus->ofdev.dev;
- dev->ofdev.dev.bus = &ebus_bus_type;
- dev_set_name(&dev->ofdev.dev, "ebus[%08x]", dp->node);
-
- /* Register with core */
- if (of_device_register(&dev->ofdev) != 0)
- printk(KERN_DEBUG "ebus: device registration error for %s!\n",
- dp->path_component_name);
-
- dp = dp->child;
- if (dp) {
- printk(" ->");
- dev->children = ebus_alloc(sizeof(struct linux_ebus_child));
-
- child = dev->children;
- child->next = NULL;
- child->parent = dev;
- child->bus = dev->bus;
- fill_ebus_child(dp, child,
- child_regs_nonstandard(dev));
-
- while ((dp = dp->sibling) != NULL) {
- child->next = ebus_alloc(sizeof(struct linux_ebus_child));
-
- child = child->next;
- child->next = NULL;
- child->parent = dev;
- child->bus = dev->bus;
- fill_ebus_child(dp, child,
- child_regs_nonstandard(dev));
- }
- }
- printk("]");
-}
-
-static struct pci_dev *find_next_ebus(struct pci_dev *start, int *is_rio_p)
-{
- struct pci_dev *pdev = start;
-
- while ((pdev = pci_get_device(PCI_VENDOR_ID_SUN, PCI_ANY_ID, pdev)))
- if (pdev->device == PCI_DEVICE_ID_SUN_EBUS ||
- pdev->device == PCI_DEVICE_ID_SUN_RIO_EBUS)
- break;
-
- *is_rio_p = !!(pdev && (pdev->device == PCI_DEVICE_ID_SUN_RIO_EBUS));
-
- return pdev;
-}
-
-void __init ebus_init(void)
-{
- struct linux_ebus_device *dev;
- struct linux_ebus *ebus;
- struct pci_dev *pdev;
- struct device_node *dp;
- int is_rio;
- int num_ebus = 0;
-
- pdev = find_next_ebus(NULL, &is_rio);
- if (!pdev) {
- printk("ebus: No EBus's found.\n");
- return;
- }
-
- dp = pci_device_to_OF_node(pdev);
-
- ebus_chain = ebus = ebus_alloc(sizeof(struct linux_ebus));
- ebus->next = NULL;
- ebus->is_rio = is_rio;
-
- while (dp) {
- struct device_node *child;
-
- /* SUNW,pci-qfe uses four empty ebuses on it.
- I think we should not consider them here,
- as they have half of the properties this
- code expects and once we do PCI hot-plug,
- we'd have to tweak with the ebus_chain
- in the runtime after initialization. -jj */
- if (!dp->child) {
- pdev = find_next_ebus(pdev, &is_rio);
- if (!pdev) {
- if (ebus == ebus_chain) {
- ebus_chain = NULL;
- printk("ebus: No EBus's found.\n");
- return;
- }
- break;
- }
- ebus->is_rio = is_rio;
- dp = pci_device_to_OF_node(pdev);
- continue;
- }
- printk("ebus%d:", num_ebus);
-
- ebus->index = num_ebus;
- ebus->prom_node = dp;
- ebus->self = pdev;
-
- ebus->ofdev.node = dp;
- ebus->ofdev.dev.parent = &pdev->dev;
- ebus->ofdev.dev.bus = &ebus_bus_type;
- dev_set_name(&ebus->ofdev.dev, "ebus%d", num_ebus);
-
- /* Register with core */
- if (of_device_register(&ebus->ofdev) != 0)
- printk(KERN_DEBUG "ebus: device registration error for %s!\n",
- dp->path_component_name);
-
-
- child = dp->child;
- if (!child)
- goto next_ebus;
-
- ebus->devices = ebus_alloc(sizeof(struct linux_ebus_device));
-
- dev = ebus->devices;
- dev->next = NULL;
- dev->children = NULL;
- dev->bus = ebus;
- fill_ebus_device(child, dev);
-
- while ((child = child->sibling) != NULL) {
- dev->next = ebus_alloc(sizeof(struct linux_ebus_device));
-
- dev = dev->next;
- dev->next = NULL;
- dev->children = NULL;
- dev->bus = ebus;
- fill_ebus_device(child, dev);
- }
-
- next_ebus:
- printk("\n");
-
- pdev = find_next_ebus(pdev, &is_rio);
- if (!pdev)
- break;
-
- dp = pci_device_to_OF_node(pdev);
-
- ebus->next = ebus_alloc(sizeof(struct linux_ebus));
- ebus = ebus->next;
- ebus->next = NULL;
- ebus->is_rio = is_rio;
- ++num_ebus;
- }
- pci_dev_put(pdev); /* XXX for the case, when ebusnd is 0, is it OK? */
-}
projects / deliverable / linux.git / blobdiff