mirror of https://gitee.com/openkylin/linux.git
393 lines
9.3 KiB
C
393 lines
9.3 KiB
C
/*
|
|
* 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/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/prom.h>
|
|
|
|
struct linux_ebus *ebus_chain = NULL;
|
|
|
|
/* We are together with pcic.c under CONFIG_PCI. */
|
|
extern unsigned int pcic_pin_to_irq(unsigned int, const 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 },
|
|
{ NULL, 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 },
|
|
{ NULL, NULL }
|
|
};
|
|
|
|
static struct ebus_device_irq *ebus_blackp = NULL;
|
|
|
|
/*
|
|
*/
|
|
static inline unsigned long ebus_alloc(size_t size)
|
|
{
|
|
return (unsigned long)kmalloc(size, GFP_ATOMIC);
|
|
}
|
|
|
|
/*
|
|
*/
|
|
static int __init ebus_blacklist_irq(const 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;
|
|
}
|
|
|
|
static void __init fill_ebus_child(struct device_node *dp,
|
|
struct linux_ebus_child *dev)
|
|
{
|
|
const int *regs;
|
|
const int *irqs;
|
|
int i, len;
|
|
|
|
dev->prom_node = dp;
|
|
regs = of_get_property(dp, "reg", &len);
|
|
if (!regs)
|
|
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 < %d\n",
|
|
dev->prom_node->name, len,
|
|
dev->parent->num_addrs);
|
|
panic(__func__);
|
|
}
|
|
|
|
/* XXX resource */
|
|
dev->resource[i].start =
|
|
dev->parent->resource[regs[i]].start;
|
|
}
|
|
|
|
for (i = 0; i < PROMINTR_MAX; i++)
|
|
dev->irqs[i] = PCI_IRQ_NONE;
|
|
|
|
if ((dev->irqs[0] = ebus_blacklist_irq(dev->prom_node->name)) != 0) {
|
|
dev->num_irqs = 1;
|
|
} else {
|
|
irqs = of_get_property(dp, "interrupts", &len);
|
|
if (!irqs) {
|
|
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];
|
|
}
|
|
} 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 PROM\n",
|
|
dev->prom_node->name, irqs[0]);
|
|
dev->num_irqs = 0;
|
|
dev->irqs[0] = 0;
|
|
} else {
|
|
dev->irqs[0] =
|
|
pcic_pin_to_irq(irqs[0],
|
|
dev->prom_node->name);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void __init fill_ebus_device(struct device_node *dp,
|
|
struct linux_ebus_device *dev)
|
|
{
|
|
const struct linux_prom_registers *regs;
|
|
struct linux_ebus_child *child;
|
|
struct dev_archdata *sd;
|
|
const int *irqs;
|
|
int i, n, len;
|
|
unsigned long baseaddr;
|
|
|
|
dev->prom_node = dp;
|
|
|
|
regs = of_get_property(dp, "reg", &len);
|
|
if (!regs)
|
|
len = 0;
|
|
if (len % sizeof(struct linux_prom_registers)) {
|
|
prom_printf("UGH: proplen for %s was %d, need multiple of %d\n",
|
|
dev->prom_node->name, len,
|
|
(int)sizeof(struct linux_prom_registers));
|
|
panic(__func__);
|
|
}
|
|
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_node->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_node->name)) != 0) {
|
|
dev->num_irqs = 1;
|
|
} else {
|
|
irqs = of_get_property(dp, "interrupts", &len);
|
|
if (!irqs) {
|
|
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 parent\n", 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 PROM\n",
|
|
dev->prom_node->name, irqs[0]);
|
|
dev->num_irqs = 0;
|
|
dev->irqs[0] = 0;
|
|
} else {
|
|
dev->irqs[0] =
|
|
pcic_pin_to_irq(irqs[0],
|
|
dev->prom_node->name);
|
|
}
|
|
}
|
|
}
|
|
|
|
sd = &dev->ofdev.dev.archdata;
|
|
sd->prom_node = dp;
|
|
sd->op = &dev->ofdev;
|
|
sd->iommu = dev->bus->ofdev.dev.parent->archdata.iommu;
|
|
|
|
dev->ofdev.node = dp;
|
|
dev->ofdev.dev.parent = &dev->bus->ofdev.dev;
|
|
dev->ofdev.dev.bus = &ebus_bus_type;
|
|
sprintf(dev->ofdev.dev.bus_id, "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);
|
|
|
|
if ((dp = dp->child) != NULL) {
|
|
dev->children = (struct linux_ebus_child *)
|
|
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);
|
|
|
|
while ((dp = dp->sibling) != NULL) {
|
|
child->next = (struct linux_ebus_child *)
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
|
|
void __init ebus_init(void)
|
|
{
|
|
const struct linux_prom_pci_registers *regs;
|
|
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;
|
|
struct device_node *dp;
|
|
struct resource *p;
|
|
unsigned short pci_command;
|
|
int len, reg, nreg;
|
|
int num_ebus = 0;
|
|
|
|
dp = of_find_node_by_path("/");
|
|
for (sp = ebus_blacklist; sp->esname != NULL; sp++) {
|
|
if (strcmp(dp->name, sp->esname) == 0) {
|
|
ebus_blackp = sp->ipt;
|
|
break;
|
|
}
|
|
}
|
|
|
|
pdev = pci_get_device(PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_EBUS, NULL);
|
|
if (!pdev)
|
|
return;
|
|
|
|
cookie = pdev->sysdata;
|
|
dp = cookie->prom_node;
|
|
|
|
ebus_chain = ebus = (struct linux_ebus *)
|
|
ebus_alloc(sizeof(struct linux_ebus));
|
|
ebus->next = NULL;
|
|
|
|
while (dp) {
|
|
struct device_node *nd;
|
|
|
|
ebus->prom_node = dp;
|
|
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);
|
|
|
|
regs = of_get_property(dp, "reg", &len);
|
|
if (!regs) {
|
|
prom_printf("%s: can't find reg property\n",
|
|
__func__);
|
|
prom_halt();
|
|
}
|
|
nreg = len / sizeof(struct linux_prom_pci_registers);
|
|
|
|
p = &ebus->self->resource[0];
|
|
for (reg = 0; reg < nreg; reg++) {
|
|
if (!(regs[reg].which_io & 0x03000000))
|
|
continue;
|
|
|
|
(p++)->start = regs[reg].phys_lo;
|
|
}
|
|
|
|
ebus->ofdev.node = dp;
|
|
ebus->ofdev.dev.parent = &pdev->dev;
|
|
ebus->ofdev.dev.bus = &ebus_bus_type;
|
|
sprintf(ebus->ofdev.dev.bus_id, "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);
|
|
|
|
|
|
nd = dp->child;
|
|
if (!nd)
|
|
goto next_ebus;
|
|
|
|
ebus->devices = (struct linux_ebus_device *)
|
|
ebus_alloc(sizeof(struct linux_ebus_device));
|
|
|
|
dev = ebus->devices;
|
|
dev->next = NULL;
|
|
dev->children = NULL;
|
|
dev->bus = ebus;
|
|
fill_ebus_device(nd, dev);
|
|
|
|
while ((nd = nd->sibling) != NULL) {
|
|
dev->next = (struct linux_ebus_device *)
|
|
ebus_alloc(sizeof(struct linux_ebus_device));
|
|
|
|
dev = dev->next;
|
|
dev->next = NULL;
|
|
dev->children = NULL;
|
|
dev->bus = ebus;
|
|
fill_ebus_device(nd, dev);
|
|
}
|
|
|
|
next_ebus:
|
|
pdev = pci_get_device(PCI_VENDOR_ID_SUN,
|
|
PCI_DEVICE_ID_SUN_EBUS, pdev);
|
|
if (!pdev)
|
|
break;
|
|
|
|
cookie = pdev->sysdata;
|
|
dp = cookie->prom_node;
|
|
|
|
ebus->next = (struct linux_ebus *)
|
|
ebus_alloc(sizeof(struct linux_ebus));
|
|
ebus = ebus->next;
|
|
ebus->next = NULL;
|
|
++num_ebus;
|
|
}
|
|
if (pdev)
|
|
pci_dev_put(pdev);
|
|
}
|