366 lines
8.5 KiB
C
366 lines
8.5 KiB
C
/* $Id: ebus.c,v 1.20 2002/01/05 01:13:43 davem Exp $
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* ebus.c: PCI to EBus bridge device.
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*
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* Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
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*
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* Adopted for sparc by V. Roganov and G. Raiko.
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* Fixes for different platforms by Pete Zaitcev.
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*/
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <asm/system.h>
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#include <asm/page.h>
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#include <asm/pbm.h>
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#include <asm/ebus.h>
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#include <asm/io.h>
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#include <asm/oplib.h>
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#include <asm/prom.h>
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#include <asm/bpp.h>
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struct linux_ebus *ebus_chain = NULL;
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/* We are together with pcic.c under CONFIG_PCI. */
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extern unsigned int pcic_pin_to_irq(unsigned int, char *name);
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/*
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* IRQ Blacklist
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* Here we list PROMs and systems that are known to supply crap as IRQ numbers.
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*/
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struct ebus_device_irq {
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char *name;
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unsigned int pin;
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};
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struct ebus_system_entry {
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char *esname;
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struct ebus_device_irq *ipt;
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};
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static struct ebus_device_irq je1_1[] = {
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{ "8042", 3 },
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{ "SUNW,CS4231", 0 },
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{ "parallel", 0 },
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{ "se", 2 },
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{ NULL, 0 }
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};
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/*
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* Gleb's JE1 supplied reasonable pin numbers, but mine did not (OBP 2.32).
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* Blacklist the sucker... Note that Gleb's system will work.
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*/
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static struct ebus_system_entry ebus_blacklist[] = {
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{ "SUNW,JavaEngine1", je1_1 },
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{ NULL, NULL }
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};
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static struct ebus_device_irq *ebus_blackp = NULL;
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/*
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*/
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static inline unsigned long ebus_alloc(size_t size)
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{
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return (unsigned long)kmalloc(size, GFP_ATOMIC);
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}
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/*
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*/
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int __init ebus_blacklist_irq(char *name)
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{
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struct ebus_device_irq *dp;
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if ((dp = ebus_blackp) != NULL) {
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for (; dp->name != NULL; dp++) {
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if (strcmp(name, dp->name) == 0) {
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return pcic_pin_to_irq(dp->pin, name);
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}
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}
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}
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return 0;
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}
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void __init fill_ebus_child(struct device_node *dp,
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struct linux_ebus_child *dev)
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{
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int *regs;
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int *irqs;
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int i, len;
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dev->prom_node = dp;
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regs = of_get_property(dp, "reg", &len);
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if (!regs)
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len = 0;
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dev->num_addrs = len / sizeof(regs[0]);
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for (i = 0; i < dev->num_addrs; i++) {
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if (regs[i] >= dev->parent->num_addrs) {
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prom_printf("UGH: property for %s was %d, need < %d\n",
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dev->prom_node->name, len,
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dev->parent->num_addrs);
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panic(__FUNCTION__);
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}
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/* XXX resource */
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dev->resource[i].start =
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dev->parent->resource[regs[i]].start;
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}
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for (i = 0; i < PROMINTR_MAX; i++)
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dev->irqs[i] = PCI_IRQ_NONE;
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if ((dev->irqs[0] = ebus_blacklist_irq(dev->prom_node->name)) != 0) {
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dev->num_irqs = 1;
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} else {
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irqs = of_get_property(dp, "interrupts", &len);
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if (!irqs) {
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dev->num_irqs = 0;
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dev->irqs[0] = 0;
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if (dev->parent->num_irqs != 0) {
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dev->num_irqs = 1;
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dev->irqs[0] = dev->parent->irqs[0];
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}
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} else {
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dev->num_irqs = len / sizeof(irqs[0]);
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if (irqs[0] == 0 || irqs[0] >= 8) {
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/*
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* XXX Zero is a valid pin number...
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* This works as long as Ebus is not wired
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* to INTA#.
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*/
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printk("EBUS: %s got bad irq %d from PROM\n",
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dev->prom_node->name, irqs[0]);
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dev->num_irqs = 0;
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dev->irqs[0] = 0;
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} else {
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dev->irqs[0] =
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pcic_pin_to_irq(irqs[0],
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dev->prom_node->name);
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}
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}
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}
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}
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void __init fill_ebus_device(struct device_node *dp, struct linux_ebus_device *dev)
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{
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struct linux_prom_registers *regs;
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struct linux_ebus_child *child;
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int *irqs;
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int i, n, len;
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unsigned long baseaddr;
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dev->prom_node = dp;
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regs = of_get_property(dp, "reg", &len);
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if (len % sizeof(struct linux_prom_registers)) {
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prom_printf("UGH: proplen for %s was %d, need multiple of %d\n",
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dev->prom_node->name, len,
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(int)sizeof(struct linux_prom_registers));
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panic(__FUNCTION__);
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}
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dev->num_addrs = len / sizeof(struct linux_prom_registers);
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for (i = 0; i < dev->num_addrs; i++) {
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/*
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* XXX Collect JE-1 PROM
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*
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* Example - JS-E with 3.11:
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* /ebus
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* regs
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* 0x00000000, 0x0, 0x00000000, 0x0, 0x00000000,
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* 0x82000010, 0x0, 0xf0000000, 0x0, 0x01000000,
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* 0x82000014, 0x0, 0x38800000, 0x0, 0x00800000,
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* ranges
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* 0x00, 0x00000000, 0x02000010, 0x0, 0x0, 0x01000000,
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* 0x01, 0x01000000, 0x02000014, 0x0, 0x0, 0x00800000,
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* /ebus/8042
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* regs
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* 0x00000001, 0x00300060, 0x00000008,
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* 0x00000001, 0x00300060, 0x00000008,
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*/
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n = regs[i].which_io;
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if (n >= 4) {
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/* XXX This is copied from old JE-1 by Gleb. */
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n = (regs[i].which_io - 0x10) >> 2;
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} else {
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;
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}
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/*
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* XXX Now as we have regions, why don't we make an on-demand allocation...
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*/
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dev->resource[i].start = 0;
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if ((baseaddr = dev->bus->self->resource[n].start +
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regs[i].phys_addr) != 0) {
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/* dev->resource[i].name = dev->prom_name; */
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if ((baseaddr = (unsigned long) ioremap(baseaddr,
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regs[i].reg_size)) == 0) {
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panic("ebus: unable to remap dev %s",
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dev->prom_node->name);
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}
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}
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dev->resource[i].start = baseaddr; /* XXX Unaligned */
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}
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for (i = 0; i < PROMINTR_MAX; i++)
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dev->irqs[i] = PCI_IRQ_NONE;
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if ((dev->irqs[0] = ebus_blacklist_irq(dev->prom_node->name)) != 0) {
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dev->num_irqs = 1;
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} else {
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irqs = of_get_property(dp, "interrupts", &len);
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if (!irqs) {
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dev->num_irqs = 0;
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if ((dev->irqs[0] = dev->bus->self->irq) != 0) {
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dev->num_irqs = 1;
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/* P3 */ /* printk("EBUS: child %s irq %d from parent\n", dev->prom_name, dev->irqs[0]); */
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}
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} else {
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dev->num_irqs = 1; /* dev->num_irqs = len / sizeof(irqs[0]); */
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if (irqs[0] == 0 || irqs[0] >= 8) {
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/* See above for the parent. XXX */
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printk("EBUS: %s got bad irq %d from PROM\n",
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dev->prom_node->name, irqs[0]);
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dev->num_irqs = 0;
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dev->irqs[0] = 0;
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} else {
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dev->irqs[0] =
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pcic_pin_to_irq(irqs[0],
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dev->prom_node->name);
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}
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}
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}
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if ((dp = dp->child) != NULL) {
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dev->children = (struct linux_ebus_child *)
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ebus_alloc(sizeof(struct linux_ebus_child));
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child = dev->children;
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child->next = NULL;
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child->parent = dev;
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child->bus = dev->bus;
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fill_ebus_child(dp, child);
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while ((dp = dp->sibling) != NULL) {
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child->next = (struct linux_ebus_child *)
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ebus_alloc(sizeof(struct linux_ebus_child));
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child = child->next;
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child->next = NULL;
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child->parent = dev;
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child->bus = dev->bus;
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fill_ebus_child(dp, child);
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}
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}
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}
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void __init ebus_init(void)
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{
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struct linux_prom_pci_registers *regs;
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struct linux_pbm_info *pbm;
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struct linux_ebus_device *dev;
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struct linux_ebus *ebus;
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struct ebus_system_entry *sp;
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struct pci_dev *pdev;
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struct pcidev_cookie *cookie;
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struct device_node *dp;
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unsigned long addr, *base;
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unsigned short pci_command;
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int len, reg, nreg;
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int num_ebus = 0;
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dp = of_find_node_by_path("/");
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for (sp = ebus_blacklist; sp->esname != NULL; sp++) {
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if (strcmp(dp->name, sp->esname) == 0) {
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ebus_blackp = sp->ipt;
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break;
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}
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}
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pdev = pci_get_device(PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_EBUS, NULL);
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if (!pdev)
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return;
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cookie = pdev->sysdata;
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dp = cookie->prom_node;
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ebus_chain = ebus = (struct linux_ebus *)
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ebus_alloc(sizeof(struct linux_ebus));
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ebus->next = NULL;
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while (dp) {
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struct device_node *nd;
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ebus->prom_node = dp;
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ebus->self = pdev;
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ebus->parent = pbm = cookie->pbm;
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/* Enable BUS Master. */
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pci_read_config_word(pdev, PCI_COMMAND, &pci_command);
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pci_command |= PCI_COMMAND_MASTER;
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pci_write_config_word(pdev, PCI_COMMAND, pci_command);
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regs = of_get_property(dp, "reg", &len);
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if (!regs) {
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prom_printf("%s: can't find reg property\n",
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__FUNCTION__);
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prom_halt();
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}
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nreg = len / sizeof(struct linux_prom_pci_registers);
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base = &ebus->self->resource[0].start;
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for (reg = 0; reg < nreg; reg++) {
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if (!(regs[reg].which_io & 0x03000000))
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continue;
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addr = regs[reg].phys_lo;
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*base++ = addr;
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}
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nd = dp->child;
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if (!nd)
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goto next_ebus;
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ebus->devices = (struct linux_ebus_device *)
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ebus_alloc(sizeof(struct linux_ebus_device));
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dev = ebus->devices;
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dev->next = NULL;
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dev->children = NULL;
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dev->bus = ebus;
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fill_ebus_device(nd, dev);
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while ((nd = nd->sibling) != NULL) {
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dev->next = (struct linux_ebus_device *)
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ebus_alloc(sizeof(struct linux_ebus_device));
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dev = dev->next;
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dev->next = NULL;
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dev->children = NULL;
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dev->bus = ebus;
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fill_ebus_device(nd, dev);
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}
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next_ebus:
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pdev = pci_get_device(PCI_VENDOR_ID_SUN,
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PCI_DEVICE_ID_SUN_EBUS, pdev);
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if (!pdev)
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break;
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cookie = pdev->sysdata;
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dp = cookie->prom_node;
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ebus->next = (struct linux_ebus *)
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ebus_alloc(sizeof(struct linux_ebus));
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ebus = ebus->next;
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ebus->next = NULL;
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++num_ebus;
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}
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if (pdev)
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pci_dev_put(pdev);
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}
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