diff options
Diffstat (limited to 'arch/powerpc/kernel/ibmebus.c')
| -rw-r--r-- | arch/powerpc/kernel/ibmebus.c | 759 |
1 files changed, 0 insertions, 759 deletions
diff --git a/arch/powerpc/kernel/ibmebus.c b/arch/powerpc/kernel/ibmebus.c deleted file mode 100644 index 6ca9a2ffaac7..000000000000 --- a/arch/powerpc/kernel/ibmebus.c +++ /dev/null @@ -1,759 +0,0 @@ -/* - * IBM PowerPC IBM eBus Infrastructure Support. - * - * Copyright (c) 2005 IBM Corporation - * Joachim Fenkes <fenkes@de.ibm.com> - * Heiko J Schick <schickhj@de.ibm.com> - * - * All rights reserved. - * - * This source code is distributed under a dual license of GPL v2.0 and OpenIB - * BSD. - * - * OpenIB BSD License - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * - * Redistributions of source code must retain the above copyright notice, this - * list of conditions and the following disclaimer. - * - * Redistributions in binary form must reproduce the above copyright notice, - * this list of conditions and the following disclaimer in the documentation - * and/or other materials - * provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE - * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR - * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER - * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - */ - -#include <linux/init.h> -#include <linux/export.h> -#include <linux/console.h> -#include <linux/kobject.h> -#include <linux/dma-mapping.h> -#include <linux/interrupt.h> -#include <linux/of.h> -#include <linux/slab.h> -#include <linux/stat.h> -#include <linux/of_platform.h> -#include <asm/ibmebus.h> - -static struct device ibmebus_bus_device = { /* fake "parent" device */ - .init_name = "ibmebus", -}; - -struct bus_type ibmebus_bus_type; - -/* These devices will automatically be added to the bus during init */ -static const struct of_device_id ibmebus_matches[] __initconst = { - { .compatible = "IBM,lhca" }, - { .compatible = "IBM,lhea" }, - {}, -}; - -static void *ibmebus_alloc_coherent(struct device *dev, - size_t size, - dma_addr_t *dma_handle, - gfp_t flag, - unsigned long attrs) -{ - void *mem; - - mem = kmalloc(size, flag); - *dma_handle = (dma_addr_t)mem; - - return mem; -} - -static void ibmebus_free_coherent(struct device *dev, - size_t size, void *vaddr, - dma_addr_t dma_handle, - unsigned long attrs) -{ - kfree(vaddr); -} - -static dma_addr_t ibmebus_map_page(struct device *dev, - struct page *page, - unsigned long offset, - size_t size, - enum dma_data_direction direction, - unsigned long attrs) -{ - return (dma_addr_t)(page_address(page) + offset); -} - -static void ibmebus_unmap_page(struct device *dev, - dma_addr_t dma_addr, - size_t size, - enum dma_data_direction direction, - unsigned long attrs) -{ - return; -} - -static int ibmebus_map_sg(struct device *dev, - struct scatterlist *sgl, - int nents, enum dma_data_direction direction, - unsigned long attrs) -{ - struct scatterlist *sg; - int i; - - for_each_sg(sgl, sg, nents, i) { - sg->dma_address = (dma_addr_t) sg_virt(sg); - sg->dma_length = sg->length; - } - - return nents; -} - -static void ibmebus_unmap_sg(struct device *dev, - struct scatterlist *sg, - int nents, enum dma_data_direction direction, - unsigned long attrs) -{ - return; -} - -static int ibmebus_dma_supported(struct device *dev, u64 mask) -{ - return mask == DMA_BIT_MASK(64); -} - -static u64 ibmebus_dma_get_required_mask(struct device *dev) -{ - return DMA_BIT_MASK(64); -} - -static struct dma_map_ops ibmebus_dma_ops = { - .alloc = ibmebus_alloc_coherent, - .free = ibmebus_free_coherent, - .map_sg = ibmebus_map_sg, - .unmap_sg = ibmebus_unmap_sg, - .dma_supported = ibmebus_dma_supported, - .get_required_mask = ibmebus_dma_get_required_mask, - .map_page = ibmebus_map_page, - .unmap_page = ibmebus_unmap_page, -}; - -static int ibmebus_match_path(struct device *dev, void *data) -{ - struct device_node *dn = to_platform_device(dev)->dev.of_node; - return (dn->full_name && - (strcasecmp((char *)data, dn->full_name) == 0)); -} - -static int ibmebus_match_node(struct device *dev, void *data) -{ - return to_platform_device(dev)->dev.of_node == data; -} - -static int ibmebus_create_device(struct device_node *dn) -{ - struct platform_device *dev; - int ret; - - dev = of_device_alloc(dn, NULL, &ibmebus_bus_device); - if (!dev) - return -ENOMEM; - - dev->dev.bus = &ibmebus_bus_type; - dev->dev.archdata.dma_ops = &ibmebus_dma_ops; - - ret = of_device_add(dev); - if (ret) - platform_device_put(dev); - return ret; -} - -static int ibmebus_create_devices(const struct of_device_id *matches) -{ - struct device_node *root, *child; - int ret = 0; - - root = of_find_node_by_path("/"); - - for_each_child_of_node(root, child) { - if (!of_match_node(matches, child)) - continue; - - if (bus_find_device(&ibmebus_bus_type, NULL, child, - ibmebus_match_node)) - continue; - - ret = ibmebus_create_device(child); - if (ret) { - printk(KERN_ERR "%s: failed to create device (%i)", - __func__, ret); - of_node_put(child); - break; - } - } - - of_node_put(root); - return ret; -} - -int ibmebus_register_driver(struct platform_driver *drv) -{ - /* If the driver uses devices that ibmebus doesn't know, add them */ - ibmebus_create_devices(drv->driver.of_match_table); - - drv->driver.bus = &ibmebus_bus_type; - return driver_register(&drv->driver); -} -EXPORT_SYMBOL(ibmebus_register_driver); - -void ibmebus_unregister_driver(struct platform_driver *drv) -{ - driver_unregister(&drv->driver); -} -EXPORT_SYMBOL(ibmebus_unregister_driver); - -int ibmebus_request_irq(u32 ist, irq_handler_t handler, - unsigned long irq_flags, const char *devname, - void *dev_id) -{ - unsigned int irq = irq_create_mapping(NULL, ist); - - if (!irq) - return -EINVAL; - - return request_irq(irq, handler, irq_flags, devname, dev_id); -} -EXPORT_SYMBOL(ibmebus_request_irq); - -void ibmebus_free_irq(u32 ist, void *dev_id) -{ - unsigned int irq = irq_find_mapping(NULL, ist); - - free_irq(irq, dev_id); - irq_dispose_mapping(irq); -} -EXPORT_SYMBOL(ibmebus_free_irq); - -static char *ibmebus_chomp(const char *in, size_t count) -{ - char *out = kmalloc(count + 1, GFP_KERNEL); - - if (!out) - return NULL; - - memcpy(out, in, count); - out[count] = '\0'; - if (out[count - 1] == '\n') - out[count - 1] = '\0'; - - return out; -} - -static ssize_t ibmebus_store_probe(struct bus_type *bus, - const char *buf, size_t count) -{ - struct device_node *dn = NULL; - char *path; - ssize_t rc = 0; - - path = ibmebus_chomp(buf, count); - if (!path) - return -ENOMEM; - - if (bus_find_device(&ibmebus_bus_type, NULL, path, - ibmebus_match_path)) { - printk(KERN_WARNING "%s: %s has already been probed\n", - __func__, path); - rc = -EEXIST; - goto out; - } - - if ((dn = of_find_node_by_path(path))) { - rc = ibmebus_create_device(dn); - of_node_put(dn); - } else { - printk(KERN_WARNING "%s: no such device node: %s\n", - __func__, path); - rc = -ENODEV; - } - -out: - kfree(path); - if (rc) - return rc; - return count; -} -static BUS_ATTR(probe, S_IWUSR, NULL, ibmebus_store_probe); - -static ssize_t ibmebus_store_remove(struct bus_type *bus, - const char *buf, size_t count) -{ - struct device *dev; - char *path; - - path = ibmebus_chomp(buf, count); - if (!path) - return -ENOMEM; - - if ((dev = bus_find_device(&ibmebus_bus_type, NULL, path, - ibmebus_match_path))) { - of_device_unregister(to_platform_device(dev)); - - kfree(path); - return count; - } else { - printk(KERN_WARNING "%s: %s not on the bus\n", - __func__, path); - - kfree(path); - return -ENODEV; - } -} -static BUS_ATTR(remove, S_IWUSR, NULL, ibmebus_store_remove); - -static struct attribute *ibmbus_bus_attrs[] = { - &bus_attr_probe.attr, - &bus_attr_remove.attr, - NULL, -}; -ATTRIBUTE_GROUPS(ibmbus_bus); - -static int ibmebus_bus_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 ibmebus_bus_device_probe(struct device *dev) -{ - int error = -ENODEV; - struct platform_driver *drv; - struct platform_device *of_dev; - - drv = to_platform_driver(dev->driver); - of_dev = to_platform_device(dev); - - if (!drv->probe) - return error; - - of_dev_get(of_dev); - - if (of_driver_match_device(dev, dev->driver)) - error = drv->probe(of_dev); - if (error) - of_dev_put(of_dev); - - return error; -} - -static int ibmebus_bus_device_remove(struct device *dev) -{ - struct platform_device *of_dev = to_platform_device(dev); - struct platform_driver *drv = to_platform_driver(dev->driver); - - if (dev->driver && drv->remove) - drv->remove(of_dev); - return 0; -} - -static void ibmebus_bus_device_shutdown(struct device *dev) -{ - struct platform_device *of_dev = to_platform_device(dev); - struct platform_driver *drv = to_platform_driver(dev->driver); - - if (dev->driver && drv->shutdown) - drv->shutdown(of_dev); -} - -/* - * ibmebus_bus_device_attrs - */ -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; -} - -static struct device_attribute ibmebus_bus_device_attrs[] = { - __ATTR_RO(devspec), - __ATTR_RO(name), - __ATTR_RO(modalias), - __ATTR_NULL -}; - -#ifdef CONFIG_PM_SLEEP -static int ibmebus_bus_legacy_suspend(struct device *dev, pm_message_t mesg) -{ - struct platform_device *of_dev = to_platform_device(dev); - struct platform_driver *drv = to_platform_driver(dev->driver); - int ret = 0; - - if (dev->driver && drv->suspend) - ret = drv->suspend(of_dev, mesg); - return ret; -} - -static int ibmebus_bus_legacy_resume(struct device *dev) -{ - struct platform_device *of_dev = to_platform_device(dev); - struct platform_driver *drv = to_platform_driver(dev->driver); - int ret = 0; - - if (dev->driver && drv->resume) - ret = drv->resume(of_dev); - return ret; -} - -static int ibmebus_bus_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 ibmebus_bus_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 ibmebus_bus_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 = ibmebus_bus_legacy_suspend(dev, PMSG_SUSPEND); - } - - return ret; -} - -static int ibmebus_bus_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 ibmebus_bus_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 = ibmebus_bus_legacy_resume(dev); - } - - return ret; -} - -static int ibmebus_bus_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 ibmebus_bus_pm_suspend NULL -#define ibmebus_bus_pm_resume NULL -#define ibmebus_bus_pm_suspend_noirq NULL -#define ibmebus_bus_pm_resume_noirq NULL - -#endif /* !CONFIG_SUSPEND */ - -#ifdef CONFIG_HIBERNATE_CALLBACKS - -static int ibmebus_bus_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 = ibmebus_bus_legacy_suspend(dev, PMSG_FREEZE); - } - - return ret; -} - -static int ibmebus_bus_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 ibmebus_bus_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 = ibmebus_bus_legacy_resume(dev); - } - - return ret; -} - -static int ibmebus_bus_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 ibmebus_bus_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 = ibmebus_bus_legacy_suspend(dev, PMSG_HIBERNATE); - } - - return ret; -} - -static int ibmebus_bus_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 ibmebus_bus_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 = ibmebus_bus_legacy_resume(dev); - } - - return ret; -} - -static int ibmebus_bus_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_HIBERNATE_CALLBACKS */ - -#define ibmebus_bus_pm_freeze NULL -#define ibmebus_bus_pm_thaw NULL -#define ibmebus_bus_pm_poweroff NULL -#define ibmebus_bus_pm_restore NULL -#define ibmebus_bus_pm_freeze_noirq NULL -#define ibmebus_bus_pm_thaw_noirq NULL -#define ibmebus_bus_pm_poweroff_noirq NULL -#define ibmebus_bus_pm_restore_noirq NULL - -#endif /* !CONFIG_HIBERNATE_CALLBACKS */ - -static struct dev_pm_ops ibmebus_bus_dev_pm_ops = { - .prepare = ibmebus_bus_pm_prepare, - .complete = ibmebus_bus_pm_complete, - .suspend = ibmebus_bus_pm_suspend, - .resume = ibmebus_bus_pm_resume, - .freeze = ibmebus_bus_pm_freeze, - .thaw = ibmebus_bus_pm_thaw, - .poweroff = ibmebus_bus_pm_poweroff, - .restore = ibmebus_bus_pm_restore, - .suspend_noirq = ibmebus_bus_pm_suspend_noirq, - .resume_noirq = ibmebus_bus_pm_resume_noirq, - .freeze_noirq = ibmebus_bus_pm_freeze_noirq, - .thaw_noirq = ibmebus_bus_pm_thaw_noirq, - .poweroff_noirq = ibmebus_bus_pm_poweroff_noirq, - .restore_noirq = ibmebus_bus_pm_restore_noirq, -}; - -#define IBMEBUS_BUS_PM_OPS_PTR (&ibmebus_bus_dev_pm_ops) - -#else /* !CONFIG_PM_SLEEP */ - -#define IBMEBUS_BUS_PM_OPS_PTR NULL - -#endif /* !CONFIG_PM_SLEEP */ - -struct bus_type ibmebus_bus_type = { - .name = "ibmebus", - .uevent = of_device_uevent_modalias, - .bus_groups = ibmbus_bus_groups, - .match = ibmebus_bus_bus_match, - .probe = ibmebus_bus_device_probe, - .remove = ibmebus_bus_device_remove, - .shutdown = ibmebus_bus_device_shutdown, - .dev_attrs = ibmebus_bus_device_attrs, - .pm = IBMEBUS_BUS_PM_OPS_PTR, -}; -EXPORT_SYMBOL(ibmebus_bus_type); - -static int __init ibmebus_bus_init(void) -{ - int err; - - printk(KERN_INFO "IBM eBus Device Driver\n"); - - err = bus_register(&ibmebus_bus_type); - if (err) { - printk(KERN_ERR "%s: failed to register IBM eBus.\n", - __func__); - return err; - } - - err = device_register(&ibmebus_bus_device); - if (err) { - printk(KERN_WARNING "%s: device_register returned %i\n", - __func__, err); - bus_unregister(&ibmebus_bus_type); - - return err; - } - - err = ibmebus_create_devices(ibmebus_matches); - if (err) { - device_unregister(&ibmebus_bus_device); - bus_unregister(&ibmebus_bus_type); - return err; - } - - return 0; -} -postcore_initcall(ibmebus_bus_init); |