diff options
Diffstat (limited to 'drivers/of')
| -rw-r--r-- | drivers/of/Kconfig | 6 | ||||
| -rw-r--r-- | drivers/of/Makefile | 1 | ||||
| -rw-r--r-- | drivers/of/device.c | 34 | ||||
| -rw-r--r-- | drivers/of/of_pci.c | 92 | ||||
| -rw-r--r-- | drivers/of/pdt.c | 112 | ||||
| -rw-r--r-- | drivers/of/platform.c | 461 |
6 files changed, 141 insertions, 565 deletions
diff --git a/drivers/of/Kconfig b/drivers/of/Kconfig index 3c6e100..d06a637 100644 --- a/drivers/of/Kconfig +++ b/drivers/of/Kconfig @@ -69,4 +69,10 @@ config OF_MDIO help OpenFirmware MDIO bus (Ethernet PHY) accessors +config OF_PCI + def_tristate PCI + depends on PCI && (PPC || MICROBLAZE || X86) + help + OpenFirmware PCI bus accessors + endmenu # OF diff --git a/drivers/of/Makefile b/drivers/of/Makefile index 3ab21a0..f7861ed 100644 --- a/drivers/of/Makefile +++ b/drivers/of/Makefile @@ -9,3 +9,4 @@ obj-$(CONFIG_OF_I2C) += of_i2c.o obj-$(CONFIG_OF_NET) += of_net.o obj-$(CONFIG_OF_SPI) += of_spi.o obj-$(CONFIG_OF_MDIO) += of_mdio.o +obj-$(CONFIG_OF_PCI) += of_pci.o diff --git a/drivers/of/device.c b/drivers/of/device.c index 45d8653..62b4b32 100644 --- a/drivers/of/device.c +++ b/drivers/of/device.c @@ -47,40 +47,6 @@ void of_dev_put(struct platform_device *dev) } EXPORT_SYMBOL(of_dev_put); -static ssize_t devspec_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct platform_device *ofdev; - - ofdev = to_platform_device(dev); - return sprintf(buf, "%s\n", ofdev->dev.of_node->full_name); -} - -static ssize_t name_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct platform_device *ofdev; - - ofdev = to_platform_device(dev); - return sprintf(buf, "%s\n", ofdev->dev.of_node->name); -} - -static ssize_t modalias_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - ssize_t len = of_device_get_modalias(dev, buf, PAGE_SIZE - 2); - buf[len] = '\n'; - buf[len+1] = 0; - return len+1; -} - -struct device_attribute of_platform_device_attrs[] = { - __ATTR_RO(devspec), - __ATTR_RO(name), - __ATTR_RO(modalias), - __ATTR_NULL -}; - int of_device_add(struct platform_device *ofdev) { BUG_ON(ofdev->dev.of_node == NULL); diff --git a/drivers/of/of_pci.c b/drivers/of/of_pci.c new file mode 100644 index 0000000..ac1ec54 --- /dev/null +++ b/drivers/of/of_pci.c @@ -0,0 +1,92 @@ +#include <linux/kernel.h> +#include <linux/of_pci.h> +#include <linux/of_irq.h> +#include <asm/prom.h> + +/** + * of_irq_map_pci - Resolve the interrupt for a PCI device + * @pdev: the device whose interrupt is to be resolved + * @out_irq: structure of_irq filled by this function + * + * This function resolves the PCI interrupt for a given PCI device. If a + * device-node exists for a given pci_dev, it will use normal OF tree + * walking. If not, it will implement standard swizzling and walk up the + * PCI tree until an device-node is found, at which point it will finish + * resolving using the OF tree walking. + */ +int of_irq_map_pci(struct pci_dev *pdev, struct of_irq *out_irq) +{ + struct device_node *dn, *ppnode; + struct pci_dev *ppdev; + u32 lspec; + __be32 lspec_be; + __be32 laddr[3]; + u8 pin; + int rc; + + /* Check if we have a device node, if yes, fallback to standard + * device tree parsing + */ + dn = pci_device_to_OF_node(pdev); + if (dn) { + rc = of_irq_map_one(dn, 0, out_irq); + if (!rc) + return rc; + } + + /* Ok, we don't, time to have fun. Let's start by building up an + * interrupt spec. we assume #interrupt-cells is 1, which is standard + * for PCI. If you do different, then don't use that routine. + */ + rc = pci_read_config_byte(pdev, PCI_INTERRUPT_PIN, &pin); + if (rc != 0) + return rc; + /* No pin, exit */ + if (pin == 0) + return -ENODEV; + + /* Now we walk up the PCI tree */ + lspec = pin; + for (;;) { + /* Get the pci_dev of our parent */ + ppdev = pdev->bus->self; + + /* Ouch, it's a host bridge... */ + if (ppdev == NULL) { + ppnode = pci_bus_to_OF_node(pdev->bus); + + /* No node for host bridge ? give up */ + if (ppnode == NULL) + return -EINVAL; + } else { + /* We found a P2P bridge, check if it has a node */ + ppnode = pci_device_to_OF_node(ppdev); + } + + /* Ok, we have found a parent with a device-node, hand over to + * the OF parsing code. + * We build a unit address from the linux device to be used for + * resolution. Note that we use the linux bus number which may + * not match your firmware bus numbering. + * Fortunately, in most cases, interrupt-map-mask doesn't + * include the bus number as part of the matching. + * You should still be careful about that though if you intend + * to rely on this function (you ship a firmware that doesn't + * create device nodes for all PCI devices). + */ + if (ppnode) + break; + + /* We can only get here if we hit a P2P bridge with no node, + * let's do standard swizzling and try again + */ + lspec = pci_swizzle_interrupt_pin(pdev, lspec); + pdev = ppdev; + } + + lspec_be = cpu_to_be32(lspec); + laddr[0] = cpu_to_be32((pdev->bus->number << 16) | (pdev->devfn << 8)); + laddr[1] = laddr[2] = cpu_to_be32(0); + return of_irq_map_raw(ppnode, &lspec_be, 1, laddr, out_irq); +} +EXPORT_SYMBOL_GPL(of_irq_map_pci); diff --git a/drivers/of/pdt.c b/drivers/of/pdt.c index 28295d0..4d87b5d 100644 --- a/drivers/of/pdt.c +++ b/drivers/of/pdt.c @@ -36,19 +36,55 @@ unsigned int of_pdt_unique_id __initdata; (p)->unique_id = of_pdt_unique_id++; \ } while (0) -static inline const char *of_pdt_node_name(struct device_node *dp) +static char * __init of_pdt_build_full_name(struct device_node *dp) { - return dp->path_component_name; + int len, ourlen, plen; + char *n; + + dp->path_component_name = build_path_component(dp); + + plen = strlen(dp->parent->full_name); + ourlen = strlen(dp->path_component_name); + len = ourlen + plen + 2; + + n = prom_early_alloc(len); + strcpy(n, dp->parent->full_name); + if (!of_node_is_root(dp->parent)) { + strcpy(n + plen, "/"); + plen++; + } + strcpy(n + plen, dp->path_component_name); + + return n; } -#else +#else /* CONFIG_SPARC */ static inline void of_pdt_incr_unique_id(void *p) { } static inline void irq_trans_init(struct device_node *dp) { } -static inline const char *of_pdt_node_name(struct device_node *dp) +static char * __init of_pdt_build_full_name(struct device_node *dp) { - return dp->name; + static int failsafe_id = 0; /* for generating unique names on failure */ + char *buf; + int len; + + if (of_pdt_prom_ops->pkg2path(dp->phandle, NULL, 0, &len)) + goto failsafe; + + buf = prom_early_alloc(len + 1); + if (of_pdt_prom_ops->pkg2path(dp->phandle, buf, len, &len)) + goto failsafe; + return buf; + + failsafe: + buf = prom_early_alloc(strlen(dp->parent->full_name) + + strlen(dp->name) + 16); + sprintf(buf, "%s/%s@unknown%i", + of_node_is_root(dp->parent) ? "" : dp->parent->full_name, + dp->name, failsafe_id++); + pr_err("%s: pkg2path failed; assigning %s\n", __func__, buf); + return buf; } #endif /* !CONFIG_SPARC */ @@ -132,47 +168,6 @@ static char * __init of_pdt_get_one_property(phandle node, const char *name) return buf; } -static char * __init of_pdt_try_pkg2path(phandle node) -{ - char *res, *buf = NULL; - int len; - - if (!of_pdt_prom_ops->pkg2path) - return NULL; - - if (of_pdt_prom_ops->pkg2path(node, buf, 0, &len)) - return NULL; - buf = prom_early_alloc(len + 1); - if (of_pdt_prom_ops->pkg2path(node, buf, len, &len)) { - pr_err("%s: package-to-path failed\n", __func__); - return NULL; - } - - res = strrchr(buf, '/'); - if (!res) { - pr_err("%s: couldn't find / in %s\n", __func__, buf); - return NULL; - } - return res+1; -} - -/* - * When fetching the node's name, first try using package-to-path; if - * that fails (either because the arch hasn't supplied a PROM callback, - * or some other random failure), fall back to just looking at the node's - * 'name' property. - */ -static char * __init of_pdt_build_name(phandle node) -{ - char *buf; - - buf = of_pdt_try_pkg2path(node); - if (!buf) - buf = of_pdt_get_one_property(node, "name"); - - return buf; -} - static struct device_node * __init of_pdt_create_node(phandle node, struct device_node *parent) { @@ -187,7 +182,7 @@ static struct device_node * __init of_pdt_create_node(phandle node, kref_init(&dp->kref); - dp->name = of_pdt_build_name(node); + dp->name = of_pdt_get_one_property(node, "name"); dp->type = of_pdt_get_one_property(node, "device_type"); dp->phandle = node; @@ -198,26 +193,6 @@ static struct device_node * __init of_pdt_create_node(phandle node, return dp; } -static char * __init of_pdt_build_full_name(struct device_node *dp) -{ - int len, ourlen, plen; - char *n; - - plen = strlen(dp->parent->full_name); - ourlen = strlen(of_pdt_node_name(dp)); - len = ourlen + plen + 2; - - n = prom_early_alloc(len); - strcpy(n, dp->parent->full_name); - if (!of_node_is_root(dp->parent)) { - strcpy(n + plen, "/"); - plen++; - } - strcpy(n + plen, of_pdt_node_name(dp)); - - return n; -} - static struct device_node * __init of_pdt_build_tree(struct device_node *parent, phandle node, struct device_node ***nextp) @@ -240,9 +215,6 @@ static struct device_node * __init of_pdt_build_tree(struct device_node *parent, *(*nextp) = dp; *nextp = &dp->allnext; -#if defined(CONFIG_SPARC) - dp->path_component_name = build_path_component(dp); -#endif dp->full_name = of_pdt_build_full_name(dp); dp->child = of_pdt_build_tree(dp, diff --git a/drivers/of/platform.c b/drivers/of/platform.c index c01cd1a..1ce4c45 100644 --- a/drivers/of/platform.c +++ b/drivers/of/platform.c @@ -42,471 +42,10 @@ struct platform_device *of_find_device_by_node(struct device_node *np) } EXPORT_SYMBOL(of_find_device_by_node); -static int platform_driver_probe_shim(struct platform_device *pdev) -{ - struct platform_driver *pdrv; - struct of_platform_driver *ofpdrv; - const struct of_device_id *match; - - pdrv = container_of(pdev->dev.driver, struct platform_driver, driver); - ofpdrv = container_of(pdrv, struct of_platform_driver, platform_driver); - - /* There is an unlikely chance that an of_platform driver might match - * on a non-OF platform device. If so, then of_match_device() will - * come up empty. Return -EINVAL in this case so other drivers get - * the chance to bind. */ - match = of_match_device(pdev->dev.driver->of_match_table, &pdev->dev); - return match ? ofpdrv->probe(pdev, match) : -EINVAL; -} - -static void platform_driver_shutdown_shim(struct platform_device *pdev) -{ - struct platform_driver *pdrv; - struct of_platform_driver *ofpdrv; - - pdrv = container_of(pdev->dev.driver, struct platform_driver, driver); - ofpdrv = container_of(pdrv, struct of_platform_driver, platform_driver); - ofpdrv->shutdown(pdev); -} - -/** - * of_register_platform_driver - */ -int of_register_platform_driver(struct of_platform_driver *drv) -{ - char *of_name; - - /* setup of_platform_driver to platform_driver adaptors */ - drv->platform_driver.driver = drv->driver; - - /* Prefix the driver name with 'of:' to avoid namespace collisions - * and bogus matches. There are some drivers in the tree that - * register both an of_platform_driver and a platform_driver with - * the same name. This is a temporary measure until they are all - * cleaned up --gcl July 29, 2010 */ - of_name = kmalloc(strlen(drv->driver.name) + 5, GFP_KERNEL); - if (!of_name) - return -ENOMEM; - sprintf(of_name, "of:%s", drv->driver.name); - drv->platform_driver.driver.name = of_name; - - if (drv->probe) - drv->platform_driver.probe = platform_driver_probe_shim; - drv->platform_driver.remove = drv->remove; - if (drv->shutdown) - drv->platform_driver.shutdown = platform_driver_shutdown_shim; - drv->platform_driver.suspend = drv->suspend; - drv->platform_driver.resume = drv->resume; - - return platform_driver_register(&drv->platform_driver); -} -EXPORT_SYMBOL(of_register_platform_driver); - -void of_unregister_platform_driver(struct of_platform_driver *drv) -{ - platform_driver_unregister(&drv->platform_driver); - kfree(drv->platform_driver.driver.name); - drv->platform_driver.driver.name = NULL; -} -EXPORT_SYMBOL(of_unregister_platform_driver); - #if defined(CONFIG_PPC_DCR) #include <asm/dcr.h> #endif -extern struct device_attribute of_platform_device_attrs[]; - -static int of_platform_bus_match(struct device *dev, struct device_driver *drv) -{ - const struct of_device_id *matches = drv->of_match_table; - - if (!matches) - return 0; - - return of_match_device(matches, dev) != NULL; -} - -static int of_platform_device_probe(struct device *dev) -{ - int error = -ENODEV; - struct of_platform_driver *drv; - struct platform_device *of_dev; - const struct of_device_id *match; - - drv = to_of_platform_driver(dev->driver); - of_dev = to_platform_device(dev); - - if (!drv->probe) - return error; - - of_dev_get(of_dev); - - match = of_match_device(drv->driver.of_match_table, dev); - if (match) - error = drv->probe(of_dev, match); - if (error) - of_dev_put(of_dev); - - return error; -} - -static int of_platform_device_remove(struct device *dev) -{ - struct platform_device *of_dev = to_platform_device(dev); - struct of_platform_driver *drv = to_of_platform_driver(dev->driver); - - if (dev->driver && drv->remove) - drv->remove(of_dev); - return 0; -} - -static void of_platform_device_shutdown(struct device *dev) -{ - struct platform_device *of_dev = to_platform_device(dev); - struct of_platform_driver *drv = to_of_platform_driver(dev->driver); - - if (dev->driver && drv->shutdown) - drv->shutdown(of_dev); -} - -#ifdef CONFIG_PM_SLEEP - -static int of_platform_legacy_suspend(struct device *dev, pm_message_t mesg) -{ - struct platform_device *of_dev = to_platform_device(dev); - struct of_platform_driver *drv = to_of_platform_driver(dev->driver); - int ret = 0; - - if (dev->driver && drv->suspend) - ret = drv->suspend(of_dev, mesg); - return ret; -} - -static int of_platform_legacy_resume(struct device *dev) -{ - struct platform_device *of_dev = to_platform_device(dev); - struct of_platform_driver *drv = to_of_platform_driver(dev->driver); - int ret = 0; - - if (dev->driver && drv->resume) - ret = drv->resume(of_dev); - return ret; -} - -static int of_platform_pm_prepare(struct device *dev) -{ - struct device_driver *drv = dev->driver; - int ret = 0; - - if (drv && drv->pm && drv->pm->prepare) - ret = drv->pm->prepare(dev); - - return ret; -} - -static void of_platform_pm_complete(struct device *dev) -{ - struct device_driver *drv = dev->driver; - - if (drv && drv->pm && drv->pm->complete) - drv->pm->complete(dev); -} - -#ifdef CONFIG_SUSPEND - -static int of_platform_pm_suspend(struct device *dev) -{ - struct device_driver *drv = dev->driver; - int ret = 0; - - if (!drv) - return 0; - - if (drv->pm) { - if (drv->pm->suspend) - ret = drv->pm->suspend(dev); - } else { - ret = of_platform_legacy_suspend(dev, PMSG_SUSPEND); - } - - return ret; -} - -static int of_platform_pm_suspend_noirq(struct device *dev) -{ - struct device_driver *drv = dev->driver; - int ret = 0; - - if (!drv) - return 0; - - if (drv->pm) { - if (drv->pm->suspend_noirq) - ret = drv->pm->suspend_noirq(dev); - } - - return ret; -} - -static int of_platform_pm_resume(struct device *dev) -{ - struct device_driver *drv = dev->driver; - int ret = 0; - - if (!drv) - return 0; - - if (drv->pm) { - if (drv->pm->resume) - ret = drv->pm->resume(dev); - } else { - ret = of_platform_legacy_resume(dev); - } - - return ret; -} - -static int of_platform_pm_resume_noirq(struct device *dev) -{ - struct device_driver *drv = dev->driver; - int ret = 0; - - if (!drv) - return 0; - - if (drv->pm) { - if (drv->pm->resume_noirq) - ret = drv->pm->resume_noirq(dev); - } - - return ret; -} - -#else /* !CONFIG_SUSPEND */ - -#define of_platform_pm_suspend NULL -#define of_platform_pm_resume NULL -#define of_platform_pm_suspend_noirq NULL -#define of_platform_pm_resume_noirq NULL - -#endif /* !CONFIG_SUSPEND */ - -#ifdef CONFIG_HIBERNATION - -static int of_platform_pm_freeze(struct device *dev) -{ - struct device_driver *drv = dev->driver; - int ret = 0; - - if (!drv) - return 0; - - if (drv->pm) { - if (drv->pm->freeze) - ret = drv->pm->freeze(dev); - } else { - ret = of_platform_legacy_suspend(dev, PMSG_FREEZE); - } - - return ret; -} - -static int of_platform_pm_freeze_noirq(struct device *dev) -{ - struct device_driver *drv = dev->driver; - int ret = 0; - - if (!drv) - return 0; - - if (drv->pm) { - if (drv->pm->freeze_noirq) - ret = drv->pm->freeze_noirq(dev); - } - - return ret; -} - -static int of_platform_pm_thaw(struct device *dev) -{ - struct device_driver *drv = dev->driver; - int ret = 0; - - if (!drv) - return 0; - - if (drv->pm) { - if (drv->pm->thaw) - ret = drv->pm->thaw(dev); - } else { - ret = of_platform_legacy_resume(dev); - } - - return ret; -} - -static int of_platform_pm_thaw_noirq(struct device *dev) -{ - struct device_driver *drv = dev->driver; - int ret = 0; - - if (!drv) - return 0; - - if (drv->pm) { - if (drv->pm->thaw_noirq) - ret = drv->pm->thaw_noirq(dev); - } - - return ret; -} - -static int of_platform_pm_poweroff(struct device *dev) -{ - struct device_driver *drv = dev->driver; - int ret = 0; - - if (!drv) - return 0; - - if (drv->pm) { - if (drv->pm->poweroff) - ret = drv->pm->poweroff(dev); - } else { - ret = of_platform_legacy_suspend(dev, PMSG_HIBERNATE); - } - - return ret; -} - -static int of_platform_pm_poweroff_noirq(struct device *dev) -{ - struct device_driver *drv = dev->driver; - int ret = 0; - - if (!drv) - return 0; - - if (drv->pm) { - if (drv->pm->poweroff_noirq) - ret = drv->pm->poweroff_noirq(dev); - } - - return ret; -} - -static int of_platform_pm_restore(struct device *dev) -{ - struct device_driver *drv = dev->driver; - int ret = 0; - - if (!drv) - return 0; - - if (drv->pm) { - if (drv->pm->restore) - ret = drv->pm->restore(dev); - } else { - ret = of_platform_legacy_resume(dev); - } - - return ret; -} - -static int of_platform_pm_restore_noirq(struct device *dev) -{ - struct device_driver *drv = dev->driver; - int ret = 0; - - if (!drv) - return 0; - - if (drv->pm) { - if (drv->pm->restore_noirq) - ret = drv->pm->restore_noirq(dev); - } - - return ret; -} - -#else /* !CONFIG_HIBERNATION */ - -#define of_platform_pm_freeze NULL -#define of_platform_pm_thaw NULL -#define of_platform_pm_poweroff NULL -#define of_platform_pm_restore NULL -#define of_platform_pm_freeze_noirq NULL -#define of_platform_pm_thaw_noirq NULL -#define of_platform_pm_poweroff_noirq NULL -#define of_platform_pm_restore_noirq NULL - -#endif /* !CONFIG_HIBERNATION */ - -static struct dev_pm_ops of_platform_dev_pm_ops = { - .prepare = of_platform_pm_prepare, - .complete = of_platform_pm_complete, - .suspend = of_platform_pm_suspend, - .resume = of_platform_pm_resume, - .freeze = of_platform_pm_freeze, - .thaw = of_platform_pm_thaw, - .poweroff = of_platform_pm_poweroff, - .restore = of_platform_pm_restore, - .suspend_noirq = of_platform_pm_suspend_noirq, - .resume_noirq = of_platform_pm_resume_noirq, - .freeze_noirq = of_platform_pm_freeze_noirq, - .thaw_noirq = of_platform_pm_thaw_noirq, - .poweroff_noirq = of_platform_pm_poweroff_noirq, - .restore_noirq = of_platform_pm_restore_noirq, -}; - -#define OF_PLATFORM_PM_OPS_PTR (&of_platform_dev_pm_ops) - -#else /* !CONFIG_PM_SLEEP */ - -#define OF_PLATFORM_PM_OPS_PTR NULL - -#endif /* !CONFIG_PM_SLEEP */ - -int of_bus_type_init(struct bus_type *bus, const char *name) -{ - bus->name = name; - bus->match = of_platform_bus_match; - bus->probe = of_platform_device_probe; - bus->remove = of_platform_device_remove; - bus->shutdown = of_platform_device_shutdown; - bus->dev_attrs = of_platform_device_attrs; - bus->pm = OF_PLATFORM_PM_OPS_PTR; - return bus_register(bus); -} - -int of_register_driver(struct of_platform_driver *drv, struct bus_type *bus) -{ - /* - * Temporary: of_platform_bus used to be distinct from the platform - * bus. It isn't anymore, and so drivers on the platform bus need - * to be registered in a special way. - * - * After all of_platform_bus_type drivers are converted to - * platform_drivers, this exception can be removed. - */ - if (bus == &platform_bus_type) - return of_register_platform_driver(drv); - - /* register with core */ - drv->driver.bus = bus; - return driver_register(&drv->driver); -} -EXPORT_SYMBOL(of_register_driver); - -void of_unregister_driver(struct of_platform_driver *drv) -{ - if (drv->driver.bus == &platform_bus_type) - of_unregister_platform_driver(drv); - else - driver_unregister(&drv->driver); -} -EXPORT_SYMBOL(of_unregister_driver); - #if !defined(CONFIG_SPARC) /* * The following routines scan a subtree and registers a device for |