mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-20 18:54:09 +08:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
330 lines
7.7 KiB
C
330 lines
7.7 KiB
C
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/slab.h>
|
|
#include <asm/oplib.h>
|
|
#include <asm/isa.h>
|
|
|
|
struct sparc_isa_bridge *isa_chain;
|
|
|
|
static void __init fatal_err(const char *reason)
|
|
{
|
|
prom_printf("ISA: fatal error, %s.\n", reason);
|
|
}
|
|
|
|
static void __init report_dev(struct sparc_isa_device *isa_dev, int child)
|
|
{
|
|
if (child)
|
|
printk(" (%s)", isa_dev->prom_name);
|
|
else
|
|
printk(" [%s", isa_dev->prom_name);
|
|
}
|
|
|
|
static void __init isa_dev_get_resource(struct sparc_isa_device *isa_dev,
|
|
struct linux_prom_registers *pregs,
|
|
int pregs_size)
|
|
{
|
|
unsigned long base, len;
|
|
int prop_len;
|
|
|
|
prop_len = prom_getproperty(isa_dev->prom_node, "reg",
|
|
(char *) pregs, pregs_size);
|
|
|
|
if (prop_len <= 0)
|
|
return;
|
|
|
|
/* Only the first one is interesting. */
|
|
len = pregs[0].reg_size;
|
|
base = (((unsigned long)pregs[0].which_io << 32) |
|
|
(unsigned long)pregs[0].phys_addr);
|
|
base += isa_dev->bus->parent->io_space.start;
|
|
|
|
isa_dev->resource.start = base;
|
|
isa_dev->resource.end = (base + len - 1UL);
|
|
isa_dev->resource.flags = IORESOURCE_IO;
|
|
isa_dev->resource.name = isa_dev->prom_name;
|
|
|
|
request_resource(&isa_dev->bus->parent->io_space,
|
|
&isa_dev->resource);
|
|
}
|
|
|
|
/* I can't believe they didn't put a real INO in the isa device
|
|
* interrupts property. The whole point of the OBP properties
|
|
* is to shield the kernel from IRQ routing details.
|
|
*
|
|
* The P1275 standard for ISA devices seems to also have been
|
|
* totally ignored.
|
|
*
|
|
* On later systems, an interrupt-map and interrupt-map-mask scheme
|
|
* akin to EBUS is used.
|
|
*/
|
|
static struct {
|
|
int obp_irq;
|
|
int pci_ino;
|
|
} grover_irq_table[] = {
|
|
{ 1, 0x00 }, /* dma, unknown ino at this point */
|
|
{ 2, 0x27 }, /* floppy */
|
|
{ 3, 0x22 }, /* parallel */
|
|
{ 4, 0x2b }, /* serial */
|
|
{ 5, 0x25 }, /* acpi power management */
|
|
|
|
{ 0, 0x00 } /* end of table */
|
|
};
|
|
|
|
static int __init isa_dev_get_irq_using_imap(struct sparc_isa_device *isa_dev,
|
|
struct sparc_isa_bridge *isa_br,
|
|
int *interrupt,
|
|
struct linux_prom_registers *pregs)
|
|
{
|
|
unsigned int hi, lo, irq;
|
|
int i;
|
|
|
|
hi = pregs->which_io & isa_br->isa_intmask.phys_hi;
|
|
lo = pregs->phys_addr & isa_br->isa_intmask.phys_lo;
|
|
irq = *interrupt & isa_br->isa_intmask.interrupt;
|
|
for (i = 0; i < isa_br->num_isa_intmap; i++) {
|
|
if ((isa_br->isa_intmap[i].phys_hi == hi) &&
|
|
(isa_br->isa_intmap[i].phys_lo == lo) &&
|
|
(isa_br->isa_intmap[i].interrupt == irq)) {
|
|
*interrupt = isa_br->isa_intmap[i].cinterrupt;
|
|
return 0;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
static void __init isa_dev_get_irq(struct sparc_isa_device *isa_dev,
|
|
struct linux_prom_registers *pregs)
|
|
{
|
|
int irq_prop;
|
|
|
|
irq_prop = prom_getintdefault(isa_dev->prom_node,
|
|
"interrupts", -1);
|
|
if (irq_prop <= 0) {
|
|
goto no_irq;
|
|
} else {
|
|
struct pci_controller_info *pcic;
|
|
struct pci_pbm_info *pbm;
|
|
int i;
|
|
|
|
if (isa_dev->bus->num_isa_intmap) {
|
|
if (!isa_dev_get_irq_using_imap(isa_dev,
|
|
isa_dev->bus,
|
|
&irq_prop,
|
|
pregs))
|
|
goto route_irq;
|
|
}
|
|
|
|
for (i = 0; grover_irq_table[i].obp_irq != 0; i++) {
|
|
if (grover_irq_table[i].obp_irq == irq_prop) {
|
|
int ino = grover_irq_table[i].pci_ino;
|
|
|
|
if (ino == 0)
|
|
goto no_irq;
|
|
|
|
irq_prop = ino;
|
|
goto route_irq;
|
|
}
|
|
}
|
|
goto no_irq;
|
|
|
|
route_irq:
|
|
pbm = isa_dev->bus->parent;
|
|
pcic = pbm->parent;
|
|
isa_dev->irq = pcic->irq_build(pbm, NULL, irq_prop);
|
|
return;
|
|
}
|
|
|
|
no_irq:
|
|
isa_dev->irq = PCI_IRQ_NONE;
|
|
}
|
|
|
|
static void __init isa_fill_children(struct sparc_isa_device *parent_isa_dev)
|
|
{
|
|
int node = prom_getchild(parent_isa_dev->prom_node);
|
|
|
|
if (node == 0)
|
|
return;
|
|
|
|
printk(" ->");
|
|
while (node != 0) {
|
|
struct linux_prom_registers regs[PROMREG_MAX];
|
|
struct sparc_isa_device *isa_dev;
|
|
int prop_len;
|
|
|
|
isa_dev = kmalloc(sizeof(*isa_dev), GFP_KERNEL);
|
|
if (!isa_dev) {
|
|
fatal_err("cannot allocate child isa_dev");
|
|
prom_halt();
|
|
}
|
|
|
|
memset(isa_dev, 0, sizeof(*isa_dev));
|
|
|
|
/* Link it in to parent. */
|
|
isa_dev->next = parent_isa_dev->child;
|
|
parent_isa_dev->child = isa_dev;
|
|
|
|
isa_dev->bus = parent_isa_dev->bus;
|
|
isa_dev->prom_node = node;
|
|
prop_len = prom_getproperty(node, "name",
|
|
(char *) isa_dev->prom_name,
|
|
sizeof(isa_dev->prom_name));
|
|
if (prop_len <= 0) {
|
|
fatal_err("cannot get child isa_dev OBP node name");
|
|
prom_halt();
|
|
}
|
|
|
|
prop_len = prom_getproperty(node, "compatible",
|
|
(char *) isa_dev->compatible,
|
|
sizeof(isa_dev->compatible));
|
|
|
|
/* Not having this is OK. */
|
|
if (prop_len <= 0)
|
|
isa_dev->compatible[0] = '\0';
|
|
|
|
isa_dev_get_resource(isa_dev, regs, sizeof(regs));
|
|
isa_dev_get_irq(isa_dev, regs);
|
|
|
|
report_dev(isa_dev, 1);
|
|
|
|
node = prom_getsibling(node);
|
|
}
|
|
}
|
|
|
|
static void __init isa_fill_devices(struct sparc_isa_bridge *isa_br)
|
|
{
|
|
int node = prom_getchild(isa_br->prom_node);
|
|
|
|
while (node != 0) {
|
|
struct linux_prom_registers regs[PROMREG_MAX];
|
|
struct sparc_isa_device *isa_dev;
|
|
int prop_len;
|
|
|
|
isa_dev = kmalloc(sizeof(*isa_dev), GFP_KERNEL);
|
|
if (!isa_dev) {
|
|
fatal_err("cannot allocate isa_dev");
|
|
prom_halt();
|
|
}
|
|
|
|
memset(isa_dev, 0, sizeof(*isa_dev));
|
|
|
|
/* Link it in. */
|
|
isa_dev->next = NULL;
|
|
if (isa_br->devices == NULL) {
|
|
isa_br->devices = isa_dev;
|
|
} else {
|
|
struct sparc_isa_device *tmp = isa_br->devices;
|
|
|
|
while (tmp->next)
|
|
tmp = tmp->next;
|
|
|
|
tmp->next = isa_dev;
|
|
}
|
|
|
|
isa_dev->bus = isa_br;
|
|
isa_dev->prom_node = node;
|
|
prop_len = prom_getproperty(node, "name",
|
|
(char *) isa_dev->prom_name,
|
|
sizeof(isa_dev->prom_name));
|
|
if (prop_len <= 0) {
|
|
fatal_err("cannot get isa_dev OBP node name");
|
|
prom_halt();
|
|
}
|
|
|
|
prop_len = prom_getproperty(node, "compatible",
|
|
(char *) isa_dev->compatible,
|
|
sizeof(isa_dev->compatible));
|
|
|
|
/* Not having this is OK. */
|
|
if (prop_len <= 0)
|
|
isa_dev->compatible[0] = '\0';
|
|
|
|
isa_dev_get_resource(isa_dev, regs, sizeof(regs));
|
|
isa_dev_get_irq(isa_dev, regs);
|
|
|
|
report_dev(isa_dev, 0);
|
|
|
|
isa_fill_children(isa_dev);
|
|
|
|
printk("]");
|
|
|
|
node = prom_getsibling(node);
|
|
}
|
|
}
|
|
|
|
void __init isa_init(void)
|
|
{
|
|
struct pci_dev *pdev;
|
|
unsigned short vendor, device;
|
|
int index = 0;
|
|
|
|
vendor = PCI_VENDOR_ID_AL;
|
|
device = PCI_DEVICE_ID_AL_M1533;
|
|
|
|
pdev = NULL;
|
|
while ((pdev = pci_get_device(vendor, device, pdev)) != NULL) {
|
|
struct pcidev_cookie *pdev_cookie;
|
|
struct pci_pbm_info *pbm;
|
|
struct sparc_isa_bridge *isa_br;
|
|
int prop_len;
|
|
|
|
pdev_cookie = pdev->sysdata;
|
|
if (!pdev_cookie) {
|
|
printk("ISA: Warning, ISA bridge ignored due to "
|
|
"lack of OBP data.\n");
|
|
continue;
|
|
}
|
|
pbm = pdev_cookie->pbm;
|
|
|
|
isa_br = kmalloc(sizeof(*isa_br), GFP_KERNEL);
|
|
if (!isa_br) {
|
|
fatal_err("cannot allocate sparc_isa_bridge");
|
|
prom_halt();
|
|
}
|
|
|
|
memset(isa_br, 0, sizeof(*isa_br));
|
|
|
|
/* Link it in. */
|
|
isa_br->next = isa_chain;
|
|
isa_chain = isa_br;
|
|
|
|
isa_br->parent = pbm;
|
|
isa_br->self = pdev;
|
|
isa_br->index = index++;
|
|
isa_br->prom_node = pdev_cookie->prom_node;
|
|
strncpy(isa_br->prom_name, pdev_cookie->prom_name,
|
|
sizeof(isa_br->prom_name));
|
|
|
|
prop_len = prom_getproperty(isa_br->prom_node,
|
|
"ranges",
|
|
(char *) isa_br->isa_ranges,
|
|
sizeof(isa_br->isa_ranges));
|
|
if (prop_len <= 0)
|
|
isa_br->num_isa_ranges = 0;
|
|
else
|
|
isa_br->num_isa_ranges =
|
|
(prop_len / sizeof(struct linux_prom_isa_ranges));
|
|
|
|
prop_len = prom_getproperty(isa_br->prom_node,
|
|
"interrupt-map",
|
|
(char *) isa_br->isa_intmap,
|
|
sizeof(isa_br->isa_intmap));
|
|
if (prop_len <= 0)
|
|
isa_br->num_isa_intmap = 0;
|
|
else
|
|
isa_br->num_isa_intmap =
|
|
(prop_len / sizeof(struct linux_prom_isa_intmap));
|
|
|
|
prop_len = prom_getproperty(isa_br->prom_node,
|
|
"interrupt-map-mask",
|
|
(char *) &(isa_br->isa_intmask),
|
|
sizeof(isa_br->isa_intmask));
|
|
|
|
printk("isa%d:", isa_br->index);
|
|
|
|
isa_fill_devices(isa_br);
|
|
|
|
printk("\n");
|
|
}
|
|
}
|