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ipmi: add PNP discovery (ACPI namespace via PNPACPI)

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This allows ipmi_si_intf.c to claim IPMI devices described in the ACPI
namespace.  Using PNP makes it simpler to parse the IRQ/IO/memory resources
of the device.

We look at any SPMI tables before looking for devices in the namespace.

This is based on ipmi_pci_probe().

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Myron Stowe <myron.stowe@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Bjorn Helgaas 2009-11-17 17:05:34 -07:00 committed by Len Brown
parent 18a3e0bfbc
commit 9e368fa011
1 changed files with 104 additions and 0 deletions
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104
drivers/char/ipmi/ipmi_si_intf.c
View file

@ -64,6 +64,7 @@
#include <linux/dmi.h>
#include <linux/string.h>
#include <linux/ctype.h>
#include <linux/pnp.h>
#ifdef CONFIG_PPC_OF
#include <linux/of_device.h>
@ -2023,6 +2024,103 @@ static __devinit void spmi_find_bmc(void)
try_init_spmi(spmi);
}
}
static int __devinit ipmi_pnp_probe(struct pnp_dev *dev,
const struct pnp_device_id *dev_id)
{
struct acpi_device *acpi_dev;
struct smi_info *info;
acpi_handle handle;
acpi_status status;
unsigned long long tmp;
acpi_dev = pnp_acpi_device(dev);
if (!acpi_dev)
return -ENODEV;
info = kzalloc(sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
info->addr_source = "ACPI";
handle = acpi_dev->handle;
/* _IFT tells us the interface type: KCS, BT, etc */
status = acpi_evaluate_integer(handle, "_IFT", NULL, &tmp);
if (ACPI_FAILURE(status))
goto err_free;
switch (tmp) {
case 1:
info->si_type = SI_KCS;
break;
case 2:
info->si_type = SI_SMIC;
break;
case 3:
info->si_type = SI_BT;
break;
default:
dev_info(&dev->dev, "unknown interface type %lld\n", tmp);
goto err_free;
}
if (pnp_port_valid(dev, 0)) {
info->io_setup = port_setup;
info->io.addr_type = IPMI_IO_ADDR_SPACE;
info->io.addr_data = pnp_port_start(dev, 0);
} else if (pnp_mem_valid(dev, 0)) {
info->io_setup = mem_setup;
info->io.addr_type = IPMI_MEM_ADDR_SPACE;
info->io.addr_data = pnp_mem_start(dev, 0);
} else {
dev_err(&dev->dev, "no I/O or memory address\n");
goto err_free;
}
info->io.regspacing = DEFAULT_REGSPACING;
info->io.regsize = DEFAULT_REGSPACING;
info->io.regshift = 0;
/* If _GPE exists, use it; otherwise use standard interrupts */
status = acpi_evaluate_integer(handle, "_GPE", NULL, &tmp);
if (ACPI_SUCCESS(status)) {
info->irq = tmp;
info->irq_setup = acpi_gpe_irq_setup;
} else if (pnp_irq_valid(dev, 0)) {
info->irq = pnp_irq(dev, 0);
info->irq_setup = std_irq_setup;
}
info->dev = &acpi_dev->dev;
pnp_set_drvdata(dev, info);
return try_smi_init(info);
err_free:
kfree(info);
return -EINVAL;
}
static void __devexit ipmi_pnp_remove(struct pnp_dev *dev)
{
struct smi_info *info = pnp_get_drvdata(dev);
cleanup_one_si(info);
}
static const struct pnp_device_id pnp_dev_table[] = {
{"IPI0001", 0},
{"", 0},
};
static struct pnp_driver ipmi_pnp_driver = {
.name = DEVICE_NAME,
.probe = ipmi_pnp_probe,
.remove = __devexit_p(ipmi_pnp_remove),
.id_table = pnp_dev_table,
};
#endif
#ifdef CONFIG_DMI
@ -3106,6 +3204,9 @@ static __devinit int init_ipmi_si(void)
#ifdef CONFIG_ACPI
spmi_find_bmc();
#endif
#ifdef CONFIG_PNP
pnp_register_driver(&ipmi_pnp_driver);
#endif
#ifdef CONFIG_PCI
rv = pci_register_driver(&ipmi_pci_driver);
@ -3229,6 +3330,9 @@ static __exit void cleanup_ipmi_si(void)
#ifdef CONFIG_PCI
pci_unregister_driver(&ipmi_pci_driver);
#endif
#ifdef CONFIG_PNP
pnp_unregister_driver(&ipmi_pnp_driver);
#endif
#ifdef CONFIG_PPC_OF
of_unregister_platform_driver(&ipmi_of_platform_driver);