ebus.c
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- /* $Id: ebus.c,v 1.18.2.2 2002/01/05 01:12:31 davem Exp $
- * ebus.c: PCI to EBus bridge device.
- *
- * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
- *
- * Adopted for sparc by V. Roganov and G. Raiko.
- * Fixes for different platforms by Pete Zaitcev.
- */
- #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/io.h>
- #include <asm/oplib.h>
- #include <asm/bpp.h>
- struct linux_ebus *ebus_chain = 0;
- #ifdef CONFIG_SUN_AUXIO
- extern void auxio_probe(void);
- #endif
- extern void rs_init(void);
- /* We are together with pcic.c under CONFIG_PCI. */
- extern unsigned int pcic_pin_to_irq(unsigned int, char *name);
- /*
- * IRQ Blacklist
- * Here we list PROMs and systems that are known to supply crap as IRQ numbers.
- */
- struct ebus_device_irq {
- char *name;
- unsigned int pin;
- };
- struct ebus_system_entry {
- char *esname;
- struct ebus_device_irq *ipt;
- };
- static struct ebus_device_irq je1_1[] = {
- { "8042", 3 },
- { "SUNW,CS4231", 0 },
- { "parallel", 0 },
- { "se", 2 },
- { 0, 0 }
- };
- /*
- * Gleb's JE1 supplied reasonable pin numbers, but mine did not (OBP 2.32).
- * Blacklist the sucker... Note that Gleb's system will work.
- */
- static struct ebus_system_entry ebus_blacklist[] = {
- { "SUNW,JavaEngine1", je1_1 },
- { 0, 0 }
- };
- static struct ebus_device_irq *ebus_blackp = NULL;
- /*
- */
- static inline unsigned long ebus_alloc(size_t size)
- {
- return (unsigned long)kmalloc(size, GFP_ATOMIC);
- }
- /*
- */
- int __init ebus_blacklist_irq(char *name)
- {
- struct ebus_device_irq *dp;
- if ((dp = ebus_blackp) != NULL) {
- for (; dp->name != NULL; dp++) {
- if (strcmp(name, dp->name) == 0) {
- return pcic_pin_to_irq(dp->pin, name);
- }
- }
- }
- return 0;
- }
- void __init fill_ebus_child(int node, struct linux_prom_registers *preg,
- struct linux_ebus_child *dev)
- {
- int regs[PROMREG_MAX];
- int irqs[PROMREG_MAX];
- char lbuf[128];
- int i, len;
- dev->prom_node = node;
- prom_getstring(node, "name", lbuf, sizeof(lbuf));
- strcpy(dev->prom_name, lbuf);
- len = prom_getproperty(node, "reg", (void *)regs, sizeof(regs));
- if (len == -1) len = 0;
- dev->num_addrs = len / sizeof(regs[0]);
- for (i = 0; i < dev->num_addrs; i++) {
- if (regs[i] >= dev->parent->num_addrs) {
- prom_printf("UGH: property for %s was %d, need < %dn",
- dev->prom_name, len, dev->parent->num_addrs);
- panic(__FUNCTION__);
- }
- dev->resource[i].start = dev->parent->resource[regs[i]].start; /* XXX resource */
- }
- for (i = 0; i < PROMINTR_MAX; i++)
- dev->irqs[i] = PCI_IRQ_NONE;
- if ((dev->irqs[0] = ebus_blacklist_irq(dev->prom_name)) != 0) {
- dev->num_irqs = 1;
- } else if ((len = prom_getproperty(node, "interrupts",
- (char *)&irqs, sizeof(irqs))) == -1 || len == 0) {
- dev->num_irqs = 0;
- dev->irqs[0] = 0;
- if (dev->parent->num_irqs != 0) {
- dev->num_irqs = 1;
- dev->irqs[0] = dev->parent->irqs[0];
- /* P3 */ /* printk("EBUS: dev %s irq %d from parentn", dev->prom_name, dev->irqs[0]); */
- }
- } else {
- dev->num_irqs = len / sizeof(irqs[0]);
- if (irqs[0] == 0 || irqs[0] >= 8) {
- /*
- * XXX Zero is a valid pin number...
- * This works as long as Ebus is not wired to INTA#.
- */
- printk("EBUS: %s got bad irq %d from PROMn",
- dev->prom_name, irqs[0]);
- dev->num_irqs = 0;
- dev->irqs[0] = 0;
- } else {
- dev->irqs[0] = pcic_pin_to_irq(irqs[0], dev->prom_name);
- }
- }
- }
- 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];
- char lbuf[128];
- int i, n, len;
- unsigned long baseaddr;
- dev->prom_node = node;
- prom_getstring(node, "name", lbuf, sizeof(lbuf));
- strcpy(dev->prom_name, lbuf);
- len = prom_getproperty(node, "reg", (void *)regs, sizeof(regs));
- 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));
- panic(__FUNCTION__);
- }
- dev->num_addrs = len / sizeof(struct linux_prom_registers);
- for (i = 0; i < dev->num_addrs; i++) {
- /*
- * XXX Collect JE-1 PROM
- *
- * Example - JS-E with 3.11:
- * /ebus
- * regs
- * 0x00000000, 0x0, 0x00000000, 0x0, 0x00000000,
- * 0x82000010, 0x0, 0xf0000000, 0x0, 0x01000000,
- * 0x82000014, 0x0, 0x38800000, 0x0, 0x00800000,
- * ranges
- * 0x00, 0x00000000, 0x02000010, 0x0, 0x0, 0x01000000,
- * 0x01, 0x01000000, 0x02000014, 0x0, 0x0, 0x00800000,
- * /ebus/8042
- * regs
- * 0x00000001, 0x00300060, 0x00000008,
- * 0x00000001, 0x00300060, 0x00000008,
- */
- n = regs[i].which_io;
- if (n >= 4) {
- /* XXX This is copied from old JE-1 by Gleb. */
- n = (regs[i].which_io - 0x10) >> 2;
- } else {
- ;
- }
- /*
- * XXX Now as we have regions, why don't we make an on-demand allocation...
- */
- dev->resource[i].start = 0;
- if ((baseaddr = dev->bus->self->resource[n].start +
- regs[i].phys_addr) != 0) {
- /* dev->resource[i].name = dev->prom_name; */
- if ((baseaddr = (unsigned long) ioremap(baseaddr,
- regs[i].reg_size)) == 0) {
- panic("ebus: unable to remap dev %s",
- dev->prom_name);
- }
- }
- dev->resource[i].start = baseaddr; /* XXX Unaligned */
- }
- for (i = 0; i < PROMINTR_MAX; i++)
- dev->irqs[i] = PCI_IRQ_NONE;
- if ((dev->irqs[0] = ebus_blacklist_irq(dev->prom_name)) != 0) {
- dev->num_irqs = 1;
- } else if ((len = prom_getproperty(node, "interrupts",
- (char *)&irqs, sizeof(irqs))) == -1 || len == 0) {
- dev->num_irqs = 0;
- if ((dev->irqs[0] = dev->bus->self->irq) != 0) {
- dev->num_irqs = 1;
- /* P3 */ /* printk("EBUS: child %s irq %d from parentn", dev->prom_name, dev->irqs[0]); */
- }
- } else {
- dev->num_irqs = 1; /* dev->num_irqs = len / sizeof(irqs[0]); */
- if (irqs[0] == 0 || irqs[0] >= 8) {
- /* See above for the parent. XXX */
- printk("EBUS: %s got bad irq %d from PROMn",
- dev->prom_name, irqs[0]);
- dev->num_irqs = 0;
- dev->irqs[0] = 0;
- } else {
- dev->irqs[0] = pcic_pin_to_irq(irqs[0], dev->prom_name);
- }
- }
- if ((node = prom_getchild(node))) {
- dev->children = (struct linux_ebus_child *)
- 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);
- while ((node = prom_getsibling(node))) {
- child->next = (struct linux_ebus_child *)
- 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);
- }
- }
- }
- void __init ebus_init(void)
- {
- struct linux_prom_pci_registers regs[PROMREG_MAX];
- struct linux_pbm_info *pbm;
- struct linux_ebus_device *dev;
- struct linux_ebus *ebus;
- struct ebus_system_entry *sp;
- struct pci_dev *pdev;
- struct pcidev_cookie *cookie;
- char lbuf[128];
- unsigned long addr, *base;
- unsigned short pci_command;
- int nd, len, ebusnd;
- int reg, nreg;
- int num_ebus = 0;
- if (!pci_present())
- return;
- prom_getstring(prom_root_node, "name", lbuf, sizeof(lbuf));
- for (sp = ebus_blacklist; sp->esname != NULL; sp++) {
- if (strcmp(lbuf, sp->esname) == 0) {
- ebus_blackp = sp->ipt;
- break;
- }
- }
- pdev = pci_find_device(PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_EBUS, 0);
- if (!pdev) {
- return;
- }
- cookie = pdev->sysdata;
- ebusnd = cookie->prom_node;
- ebus_chain = ebus = (struct linux_ebus *)
- ebus_alloc(sizeof(struct linux_ebus));
- ebus->next = 0;
- while (ebusnd) {
- prom_getstring(ebusnd, "name", lbuf, sizeof(lbuf));
- ebus->prom_node = ebusnd;
- strcpy(ebus->prom_name, lbuf);
- ebus->self = pdev;
- ebus->parent = pbm = cookie->pbm;
- /* Enable BUS Master. */
- pci_read_config_word(pdev, PCI_COMMAND, &pci_command);
- pci_command |= PCI_COMMAND_MASTER;
- pci_write_config_word(pdev, PCI_COMMAND, pci_command);
- len = prom_getproperty(ebusnd, "reg", (void *)regs,
- sizeof(regs));
- if (len == 0 || len == -1) {
- prom_printf("%s: can't find reg propertyn",
- __FUNCTION__);
- prom_halt();
- }
- nreg = len / sizeof(struct linux_prom_pci_registers);
- base = &ebus->self->resource[0].start;
- for (reg = 0; reg < nreg; reg++) {
- if (!(regs[reg].which_io & 0x03000000))
- continue;
- addr = regs[reg].phys_lo;
- *base++ = addr;
- }
- nd = prom_getchild(ebusnd);
- if (!nd)
- goto next_ebus;
- ebus->devices = (struct linux_ebus_device *)
- 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 = (struct linux_ebus_device *)
- 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:
- pdev = pci_find_device(PCI_VENDOR_ID_SUN,
- PCI_DEVICE_ID_SUN_EBUS, pdev);
- if (!pdev)
- break;
- cookie = pdev->sysdata;
- ebusnd = cookie->prom_node;
- ebus->next = (struct linux_ebus *)
- ebus_alloc(sizeof(struct linux_ebus));
- ebus = ebus->next;
- ebus->next = 0;
- ++num_ebus;
- }
- rs_init();
- #ifdef CONFIG_SUN_AUXIO
- auxio_probe();
- #endif
- }