/*
* File: pci-acpi.c
- * Purpose: Provde PCI support in ACPI
+ * Purpose: Provide PCI support in ACPI
*
* Copyright (C) 2005 David Shaohua Li <shaohua.li@intel.com>
* Copyright (C) 2004 Tom Long Nguyen <tom.l.nguyen@intel.com>
static int acpi_pci_choose_state(struct pci_dev *pdev, pm_message_t state)
{
- char dstate_str[] = "_S0D";
- acpi_status status;
- unsigned long val;
- struct device *dev = &pdev->dev;
+ /* TBD */
- /* Fixme: the check is wrong after pm_message_t is a struct */
- if ((state >= PM_SUSPEND_MAX) || !DEVICE_ACPI_HANDLE(dev))
- return -EINVAL;
- dstate_str[2] += state; /* _S1D, _S2D, _S3D, _S4D */
- status = acpi_evaluate_integer(DEVICE_ACPI_HANDLE(dev), dstate_str,
- NULL, &val);
- if (ACPI_SUCCESS(status))
- return val;
return -ENODEV;
}
+static int acpi_pci_set_power_state(struct pci_dev *dev, pci_power_t state)
+{
+ acpi_handle handle = DEVICE_ACPI_HANDLE(&dev->dev);
+ static int state_conv[] = {
+ [0] = 0,
+ [1] = 1,
+ [2] = 2,
+ [3] = 3,
+ [4] = 3
+ };
+ int acpi_state = state_conv[(int __force) state];
+
+ if (!handle)
+ return -ENODEV;
+ return acpi_bus_set_power(handle, acpi_state);
+}
+
+
/* ACPI bus type */
static int pci_acpi_find_device(struct device *dev, acpi_handle *handle)
{
if (ret)
return 0;
platform_pci_choose_state = acpi_pci_choose_state;
+ platform_pci_set_power_state = acpi_pci_set_power_state;
return 0;
}
arch_initcall(pci_acpi_init);