ebus.c
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- /* $Id: ebus.c,v 1.64.2.1 2002/03/12 18:46:14 davem Exp $
- * ebus.c: PCI to EBus bridge device.
- *
- * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
- * Copyright (C) 1999 David S. Miller (davem@redhat.com)
- */
- #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/oplib.h>
- #include <asm/bpp.h>
- #include <asm/irq.h>
- struct linux_ebus *ebus_chain = 0;
- #ifdef CONFIG_SUN_AUXIO
- extern void auxio_probe(void);
- #endif
- static inline void *ebus_alloc(size_t size)
- {
- void *mem;
- mem = kmalloc(size, GFP_ATOMIC);
- if (!mem)
- panic("ebus_alloc: out of memory");
- memset((char *)mem, 0, size);
- return mem;
- }
- static void __init ebus_ranges_init(struct linux_ebus *ebus)
- {
- int success;
- ebus->num_ebus_ranges = 0;
- success = prom_getproperty(ebus->prom_node, "ranges",
- (char *)ebus->ebus_ranges,
- sizeof(ebus->ebus_ranges));
- if (success != -1)
- ebus->num_ebus_ranges = (success/sizeof(struct linux_prom_ebus_ranges));
- }
- static void __init ebus_intmap_init(struct linux_ebus *ebus)
- {
- int success;
- ebus->num_ebus_intmap = 0;
- success = prom_getproperty(ebus->prom_node, "interrupt-map",
- (char *)ebus->ebus_intmap,
- sizeof(ebus->ebus_intmap));
- if (success == -1)
- return;
- ebus->num_ebus_intmap = (success/sizeof(struct linux_prom_ebus_intmap));
- success = prom_getproperty(ebus->prom_node, "interrupt-map-mask",
- (char *)&ebus->ebus_intmask,
- sizeof(ebus->ebus_intmask));
- if (success == -1) {
- prom_printf("ebus: can't get interrupt-map-maskn");
- prom_halt();
- }
- }
- int __init ebus_intmap_match(struct linux_ebus *ebus,
- struct linux_prom_registers *reg,
- int *interrupt)
- {
- unsigned int hi, lo, irq;
- int i;
- if (!ebus->num_ebus_intmap)
- return 0;
- hi = reg->which_io & ebus->ebus_intmask.phys_hi;
- lo = reg->phys_addr & ebus->ebus_intmask.phys_lo;
- irq = *interrupt & ebus->ebus_intmask.interrupt;
- for (i = 0; i < ebus->num_ebus_intmap; i++) {
- if ((ebus->ebus_intmap[i].phys_hi == hi) &&
- (ebus->ebus_intmap[i].phys_lo == lo) &&
- (ebus->ebus_intmap[i].interrupt == irq)) {
- *interrupt = ebus->ebus_intmap[i].cinterrupt;
- return 0;
- }
- }
- return -1;
- }
- void __init fill_ebus_child(int node, struct linux_prom_registers *preg,
- struct linux_ebus_child *dev, int non_standard_regs)
- {
- int regs[PROMREG_MAX];
- int irqs[PROMREG_MAX];
- int i, len;
- dev->prom_node = node;
- prom_getstring(node, "name", dev->prom_name, sizeof(dev->prom_name));
- printk(" (%s)", dev->prom_name);
- len = prom_getproperty(node, "reg", (void *)regs, sizeof(regs));
- 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 < %dn",
- dev->prom_name, len, dev->parent->num_addrs);
- panic("fill_ebus_child");
- }
- 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 = dev->prom_name;
- }
- }
- for (i = 0; i < PROMINTR_MAX; i++)
- dev->irqs[i] = PCI_IRQ_NONE;
- 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")) {
- if (!strcmp(dev->prom_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];
- }
- }
- } else {
- dev->num_irqs = len / sizeof(irqs[0]);
- for (i = 0; i < dev->num_irqs; i++) {
- struct pci_pbm_info *pbm = dev->bus->parent;
- struct pci_controller_info *p = pbm->parent;
- if (ebus_intmap_match(dev->bus, preg, &irqs[i]) != -1) {
- dev->irqs[i] = p->irq_build(pbm,
- dev->bus->self,
- irqs[i]);
- } else {
- /* If we get a bogus interrupt property, just
- * record the raw value instead of punting.
- */
- dev->irqs[i] = irqs[i];
- }
- }
- }
- }
- static int __init child_regs_nonstandard(struct linux_ebus_device *dev)
- {
- if (!strcmp(dev->prom_name, "i2c"))
- return 1;
- return 0;
- }
- 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];
- int i, n, len;
- dev->prom_node = node;
- prom_getstring(node, "name", dev->prom_name, sizeof(dev->prom_name));
- printk(" [%s", dev->prom_name);
- len = prom_getproperty(node, "reg", (void *)regs, sizeof(regs));
- if (len == -1) {
- dev->num_addrs = 0;
- goto probe_interrupts;
- }
- if (len % sizeof(struct linux_prom_registers)) {
- prom_printf("UGH: proplen for %s was %d, need multiple of %dn",
- dev->prom_name, len,
- (int)sizeof(struct linux_prom_registers));
- prom_halt();
- }
- dev->num_addrs = len / sizeof(struct linux_prom_registers);
- for (i = 0; i < dev->num_addrs; i++) {
- /* XXX Learn how to interpret ebus ranges... -DaveM */
- if (regs[i].which_io >= 0x10)
- n = (regs[i].which_io - 0x10) >> 2;
- else
- n = regs[i].which_io;
- dev->resource[i].start = dev->bus->self->resource[n].start;
- dev->resource[i].start += (unsigned long)regs[i].phys_addr;
- dev->resource[i].end =
- (dev->resource[i].start + (unsigned long)regs[i].reg_size - 1UL);
- dev->resource[i].flags = IORESOURCE_MEM;
- dev->resource[i].name = dev->prom_name;
- request_resource(&dev->bus->self->resource[n],
- &dev->resource[i]);
- }
- probe_interrupts:
- for (i = 0; i < PROMINTR_MAX; i++)
- dev->irqs[i] = PCI_IRQ_NONE;
- 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]);
- for (i = 0; i < dev->num_irqs; i++) {
- struct pci_pbm_info *pbm = dev->bus->parent;
- struct pci_controller_info *p = pbm->parent;
- if (ebus_intmap_match(dev->bus, ®s[0], &irqs[i]) != -1) {
- dev->irqs[i] = p->irq_build(pbm,
- dev->bus->self,
- irqs[i]);
- } else {
- /* If we get a bogus interrupt property, just
- * record the raw value instead of punting.
- */
- dev->irqs[i] = irqs[i];
- }
- }
- }
- if ((node = prom_getchild(node))) {
- printk(" ->");
- dev->children = 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, child_regs_nonstandard(dev));
- while ((node = prom_getsibling(node))) {
- child->next = 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, 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;
- do {
- pdev = pci_find_device(PCI_VENDOR_ID_SUN, PCI_ANY_ID, pdev);
- if (pdev &&
- (pdev->device == PCI_DEVICE_ID_SUN_EBUS ||
- pdev->device == PCI_DEVICE_ID_SUN_RIO_EBUS))
- break;
- } while (pdev != NULL);
- if (pdev && (pdev->device == PCI_DEVICE_ID_SUN_RIO_EBUS))
- *is_rio_p = 1;
- else
- *is_rio_p = 0;
- return pdev;
- }
- void __init ebus_init(void)
- {
- struct pci_pbm_info *pbm;
- struct linux_ebus_device *dev;
- struct linux_ebus *ebus;
- struct pci_dev *pdev;
- struct pcidev_cookie *cookie;
- int nd, ebusnd, is_rio;
- int num_ebus = 0;
- if (!pci_present())
- return;
- pdev = find_next_ebus(NULL, &is_rio);
- if (!pdev) {
- printk("ebus: No EBus's found.n");
- return;
- }
- cookie = pdev->sysdata;
- ebusnd = cookie->prom_node;
- ebus_chain = ebus = ebus_alloc(sizeof(struct linux_ebus));
- ebus->next = 0;
- ebus->is_rio = is_rio;
- while (ebusnd) {
- /* 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 (!prom_getchild (ebusnd)) {
- 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;
- cookie = pdev->sysdata;
- ebusnd = cookie->prom_node;
- continue;
- }
- printk("ebus%d:", num_ebus);
- prom_getstring(ebusnd, "name", ebus->prom_name, sizeof(ebus->prom_name));
- ebus->index = num_ebus;
- ebus->prom_node = ebusnd;
- ebus->self = pdev;
- ebus->parent = pbm = cookie->pbm;
- ebus_ranges_init(ebus);
- ebus_intmap_init(ebus);
- nd = prom_getchild(ebusnd);
- if (!nd)
- goto next_ebus;
- ebus->devices = 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 = 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:
- printk("n");
- pdev = find_next_ebus(pdev, &is_rio);
- if (!pdev)
- break;
- cookie = pdev->sysdata;
- ebusnd = cookie->prom_node;
- ebus->next = ebus_alloc(sizeof(struct linux_ebus));
- ebus = ebus->next;
- ebus->next = 0;
- ebus->is_rio = is_rio;
- ++num_ebus;
- }
- #ifdef CONFIG_SUN_AUXIO
- auxio_probe();
- #endif
- }