android_kernel_xiaomi_sm8350/arch/sparc64/kernel/isa.c
David S. Miller 2b1e597871 [SPARC64]: of_device layer IRQ resolution
Do IRQ determination generically by parsing the PROM properties,
and using IRQ controller drivers for final resolution.

One immediate positive effect is that all of the IRQ frobbing
in the EBUS, ISA, and PCI controller layers has been eliminated.
We just look up the of_device and use the properly computed
value.

The PCI controller irq_build() routines are gone and no longer
used.  Unfortunately sbus_build_irq() has to remain as there is
a direct reference to this in the sunzilog driver.  That can be
killed off once the sparc32 side of this is written and the
sunzilog driver is transformed into an "of" bus driver.

Signed-off-by: David S. Miller <davem@davemloft.net>
2006-06-29 16:37:38 -07:00

220 lines
4.9 KiB
C

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <asm/oplib.h>
#include <asm/prom.h>
#include <asm/of_device.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_node->name);
else
printk(" [%s", isa_dev->prom_node->name);
}
static struct linux_prom_registers * __init
isa_dev_get_resource(struct sparc_isa_device *isa_dev)
{
struct linux_prom_registers *pregs;
unsigned long base, len;
int prop_len;
pregs = of_get_property(isa_dev->prom_node, "reg", &prop_len);
/* 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_node->name;
request_resource(&isa_dev->bus->parent->io_space,
&isa_dev->resource);
return pregs;
}
static void __init isa_dev_get_irq(struct sparc_isa_device *isa_dev,
struct linux_prom_registers *pregs)
{
struct of_device *op = of_find_device_by_node(isa_dev->prom_node);
if (!op || !op->num_irqs) {
isa_dev->irq = PCI_IRQ_NONE;
} else {
isa_dev->irq = op->irqs[0];
}
}
static void __init isa_fill_children(struct sparc_isa_device *parent_isa_dev)
{
struct device_node *dp = parent_isa_dev->prom_node->child;
if (!dp)
return;
printk(" ->");
while (dp) {
struct linux_prom_registers *regs;
struct sparc_isa_device *isa_dev;
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 = dp;
regs = isa_dev_get_resource(isa_dev);
isa_dev_get_irq(isa_dev, regs);
report_dev(isa_dev, 1);
dp = dp->sibling;
}
}
static void __init isa_fill_devices(struct sparc_isa_bridge *isa_br)
{
struct device_node *dp = isa_br->prom_node->child;
while (dp) {
struct linux_prom_registers *regs;
struct sparc_isa_device *isa_dev;
isa_dev = kmalloc(sizeof(*isa_dev), GFP_KERNEL);
if (!isa_dev) {
printk(KERN_DEBUG "ISA: cannot allocate isa_dev");
return;
}
memset(isa_dev, 0, sizeof(*isa_dev));
isa_dev->ofdev.node = dp;
isa_dev->ofdev.dev.parent = &isa_br->ofdev.dev;
isa_dev->ofdev.dev.bus = &isa_bus_type;
strcpy(isa_dev->ofdev.dev.bus_id, dp->path_component_name);
/* Register with core */
if (of_device_register(&isa_dev->ofdev) != 0) {
printk(KERN_DEBUG "isa: device registration error for %s!\n",
isa_dev->ofdev.dev.bus_id);
kfree(isa_dev);
goto next_sibling;
}
/* 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 = dp;
regs = isa_dev_get_resource(isa_dev);
isa_dev_get_irq(isa_dev, regs);
report_dev(isa_dev, 0);
isa_fill_children(isa_dev);
printk("]");
next_sibling:
dp = dp->sibling;
}
}
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;
struct device_node *dp;
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;
dp = pdev_cookie->prom_node;
isa_br = kmalloc(sizeof(*isa_br), GFP_KERNEL);
if (!isa_br) {
printk(KERN_DEBUG "isa: cannot allocate sparc_isa_bridge");
return;
}
memset(isa_br, 0, sizeof(*isa_br));
isa_br->ofdev.node = dp;
isa_br->ofdev.dev.parent = &pdev->dev;
isa_br->ofdev.dev.bus = &isa_bus_type;
strcpy(isa_br->ofdev.dev.bus_id, dp->path_component_name);
/* Register with core */
if (of_device_register(&isa_br->ofdev) != 0) {
printk(KERN_DEBUG "isa: device registration error for %s!\n",
isa_br->ofdev.dev.bus_id);
kfree(isa_br);
return;
}
/* 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;
printk("isa%d:", isa_br->index);
isa_fill_devices(isa_br);
printk("\n");
}
}