Messages in this thread Patches in this message | | | Subject | [PATCH/RFC 3/4]An implementation for PCI bus | From | Li Shaohua <> | Date | Mon, 08 Nov 2004 12:11:21 +0800 |
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Hi, An implementation to bind PCI devices with ACPI devices
Thanks, Shaohua ---
2.6-root/drivers/pci/pci-driver.c | 52 ++++++++++++++++++++++++++++++++++++++ 1 files changed, 52 insertions(+)
diff -puN drivers/pci/pci-driver.c~pci-bind-acpi drivers/pci/pci-driver.c --- 2.6/drivers/pci/pci-driver.c~pci-bind-acpi 2004-11-08 11:06:53.249197784 +0800 +++ 2.6-root/drivers/pci/pci-driver.c 2004-11-08 11:08:50.244411808 +0800 @@ -530,12 +530,64 @@ int pci_hotplug (struct device *dev, cha } #endif +#ifdef CONFIG_ACPI +#include <linux/acpi.h> +int pci_device_platform_bind(struct device *dev) +{ + struct pci_dev * pci_dev; + acpi_handle parent_handle = NULL; + acpi_integer address; + + pci_dev = to_pci_dev(dev); + if (!pci_dev->bus->parent) { + /* It's device under root bridge + * This is a little ugly, but now root bridge + * is added in special way. + */ + parent_handle = acpi_get_rootbridge_handle( + pci_domain_nr(pci_dev->bus), pci_dev->bus->number); + } else { + if (dev->parent) + parent_handle = dev->parent->handle; + } + if (!parent_handle) { + printk("Can't find parent handle \n"); + return -1; + } + /* Please ref to ACPI spec for syntax of _ADR */ + address = (PCI_SLOT(pci_dev->devfn) << 16) | PCI_FUNC(pci_dev->devfn); + dev->handle = acpi_get_child(parent_handle, address); + +#if 1 + {/* For Debug */ + char name[80] = {'?','\0'}; + struct acpi_buffer buffer = {sizeof(name), name}; + + printk("Device %s:", pci_name(pci_dev)); + if (dev->handle) { + acpi_get_name(dev->handle, ACPI_FULL_PATHNAME, &buffer); + printk("%s", name); + } + printk("\n"); + } +#endif + + return 0; +} +#else +int pci_device_platform_bind(struct device *dev) +{ + return 0; +} +#endif + struct bus_type pci_bus_type = { .name = "pci", .match = pci_bus_match, .hotplug = pci_hotplug, .suspend = pci_device_suspend, .resume = pci_device_resume, + .platform_bind = pci_device_platform_bind, .dev_attrs = pci_dev_attrs, }; _
A sample implementation to bind PCI devices with ACPI devices
---
2.6-root/drivers/pci/pci-driver.c | 52 ++++++++++++++++++++++++++++++++++++++ 1 files changed, 52 insertions(+)
diff -puN drivers/pci/pci-driver.c~pci-bind-acpi drivers/pci/pci-driver.c --- 2.6/drivers/pci/pci-driver.c~pci-bind-acpi 2004-11-08 11:06:53.249197784 +0800 +++ 2.6-root/drivers/pci/pci-driver.c 2004-11-08 11:08:50.244411808 +0800 @@ -530,12 +530,64 @@ int pci_hotplug (struct device *dev, cha } #endif +#ifdef CONFIG_ACPI +#include <linux/acpi.h> +int pci_device_platform_bind(struct device *dev) +{ + struct pci_dev * pci_dev; + acpi_handle parent_handle = NULL; + acpi_integer address; + + pci_dev = to_pci_dev(dev); + if (!pci_dev->bus->parent) { + /* It's device under root bridge + * This is a little ugly, but now root bridge + * is added in special way. + */ + parent_handle = acpi_get_rootbridge_handle( + pci_domain_nr(pci_dev->bus), pci_dev->bus->number); + } else { + if (dev->parent) + parent_handle = dev->parent->handle; + } + if (!parent_handle) { + printk("Can't find parent handle \n"); + return -1; + } + /* Please ref to ACPI spec for syntax of _ADR */ + address = (PCI_SLOT(pci_dev->devfn) << 16) | PCI_FUNC(pci_dev->devfn); + dev->handle = acpi_get_child(parent_handle, address); + +#if 1 + {/* For Debug */ + char name[80] = {'?','\0'}; + struct acpi_buffer buffer = {sizeof(name), name}; + + printk("Device %s:", pci_name(pci_dev)); + if (dev->handle) { + acpi_get_name(dev->handle, ACPI_FULL_PATHNAME, &buffer); + printk("%s", name); + } + printk("\n"); + } +#endif + + return 0; +} +#else +int pci_device_platform_bind(struct device *dev) +{ + return 0; +} +#endif + struct bus_type pci_bus_type = { .name = "pci", .match = pci_bus_match, .hotplug = pci_hotplug, .suspend = pci_device_suspend, .resume = pci_device_resume, + .platform_bind = pci_device_platform_bind, .dev_attrs = pci_dev_attrs, }; _ | |