diff options
Diffstat (limited to 'drivers/staging/greybus/bundle.c')
| -rw-r--r-- | drivers/staging/greybus/bundle.c | 252 |
1 files changed, 0 insertions, 252 deletions
diff --git a/drivers/staging/greybus/bundle.c b/drivers/staging/greybus/bundle.c deleted file mode 100644 index 3f702db9e098..000000000000 --- a/drivers/staging/greybus/bundle.c +++ /dev/null @@ -1,252 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Greybus bundles - * - * Copyright 2014-2015 Google Inc. - * Copyright 2014-2015 Linaro Ltd. - */ - -#include "greybus.h" -#include "greybus_trace.h" - -static ssize_t bundle_class_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct gb_bundle *bundle = to_gb_bundle(dev); - - return sprintf(buf, "0x%02x\n", bundle->class); -} -static DEVICE_ATTR_RO(bundle_class); - -static ssize_t bundle_id_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct gb_bundle *bundle = to_gb_bundle(dev); - - return sprintf(buf, "%u\n", bundle->id); -} -static DEVICE_ATTR_RO(bundle_id); - -static ssize_t state_show(struct device *dev, struct device_attribute *attr, - char *buf) -{ - struct gb_bundle *bundle = to_gb_bundle(dev); - - if (!bundle->state) - return sprintf(buf, "\n"); - - return sprintf(buf, "%s\n", bundle->state); -} - -static ssize_t state_store(struct device *dev, struct device_attribute *attr, - const char *buf, size_t size) -{ - struct gb_bundle *bundle = to_gb_bundle(dev); - - kfree(bundle->state); - bundle->state = kstrdup(buf, GFP_KERNEL); - if (!bundle->state) - return -ENOMEM; - - /* Tell userspace that the file contents changed */ - sysfs_notify(&bundle->dev.kobj, NULL, "state"); - - return size; -} -static DEVICE_ATTR_RW(state); - -static struct attribute *bundle_attrs[] = { - &dev_attr_bundle_class.attr, - &dev_attr_bundle_id.attr, - &dev_attr_state.attr, - NULL, -}; - -ATTRIBUTE_GROUPS(bundle); - -static struct gb_bundle *gb_bundle_find(struct gb_interface *intf, - u8 bundle_id) -{ - struct gb_bundle *bundle; - - list_for_each_entry(bundle, &intf->bundles, links) { - if (bundle->id == bundle_id) - return bundle; - } - - return NULL; -} - -static void gb_bundle_release(struct device *dev) -{ - struct gb_bundle *bundle = to_gb_bundle(dev); - - trace_gb_bundle_release(bundle); - - kfree(bundle->state); - kfree(bundle->cport_desc); - kfree(bundle); -} - -#ifdef CONFIG_PM -static void gb_bundle_disable_all_connections(struct gb_bundle *bundle) -{ - struct gb_connection *connection; - - list_for_each_entry(connection, &bundle->connections, bundle_links) - gb_connection_disable(connection); -} - -static void gb_bundle_enable_all_connections(struct gb_bundle *bundle) -{ - struct gb_connection *connection; - - list_for_each_entry(connection, &bundle->connections, bundle_links) - gb_connection_enable(connection); -} - -static int gb_bundle_suspend(struct device *dev) -{ - struct gb_bundle *bundle = to_gb_bundle(dev); - const struct dev_pm_ops *pm = dev->driver->pm; - int ret; - - if (pm && pm->runtime_suspend) { - ret = pm->runtime_suspend(&bundle->dev); - if (ret) - return ret; - } else { - gb_bundle_disable_all_connections(bundle); - } - - ret = gb_control_bundle_suspend(bundle->intf->control, bundle->id); - if (ret) { - if (pm && pm->runtime_resume) - ret = pm->runtime_resume(dev); - else - gb_bundle_enable_all_connections(bundle); - - return ret; - } - - return 0; -} - -static int gb_bundle_resume(struct device *dev) -{ - struct gb_bundle *bundle = to_gb_bundle(dev); - const struct dev_pm_ops *pm = dev->driver->pm; - int ret; - - ret = gb_control_bundle_resume(bundle->intf->control, bundle->id); - if (ret) - return ret; - - if (pm && pm->runtime_resume) { - ret = pm->runtime_resume(dev); - if (ret) - return ret; - } else { - gb_bundle_enable_all_connections(bundle); - } - - return 0; -} - -static int gb_bundle_idle(struct device *dev) -{ - pm_runtime_mark_last_busy(dev); - pm_request_autosuspend(dev); - - return 0; -} -#endif - -static const struct dev_pm_ops gb_bundle_pm_ops = { - SET_RUNTIME_PM_OPS(gb_bundle_suspend, gb_bundle_resume, gb_bundle_idle) -}; - -struct device_type greybus_bundle_type = { - .name = "greybus_bundle", - .release = gb_bundle_release, - .pm = &gb_bundle_pm_ops, -}; - -/* - * Create a gb_bundle structure to represent a discovered - * bundle. Returns a pointer to the new bundle or a null - * pointer if a failure occurs due to memory exhaustion. - */ -struct gb_bundle *gb_bundle_create(struct gb_interface *intf, u8 bundle_id, - u8 class) -{ - struct gb_bundle *bundle; - - if (bundle_id == BUNDLE_ID_NONE) { - dev_err(&intf->dev, "can't use bundle id %u\n", bundle_id); - return NULL; - } - - /* - * Reject any attempt to reuse a bundle id. We initialize - * these serially, so there's no need to worry about keeping - * the interface bundle list locked here. - */ - if (gb_bundle_find(intf, bundle_id)) { - dev_err(&intf->dev, "duplicate bundle id %u\n", bundle_id); - return NULL; - } - - bundle = kzalloc(sizeof(*bundle), GFP_KERNEL); - if (!bundle) - return NULL; - - bundle->intf = intf; - bundle->id = bundle_id; - bundle->class = class; - INIT_LIST_HEAD(&bundle->connections); - - bundle->dev.parent = &intf->dev; - bundle->dev.bus = &greybus_bus_type; - bundle->dev.type = &greybus_bundle_type; - bundle->dev.groups = bundle_groups; - bundle->dev.dma_mask = intf->dev.dma_mask; - device_initialize(&bundle->dev); - dev_set_name(&bundle->dev, "%s.%d", dev_name(&intf->dev), bundle_id); - - list_add(&bundle->links, &intf->bundles); - - trace_gb_bundle_create(bundle); - - return bundle; -} - -int gb_bundle_add(struct gb_bundle *bundle) -{ - int ret; - - ret = device_add(&bundle->dev); - if (ret) { - dev_err(&bundle->dev, "failed to register bundle: %d\n", ret); - return ret; - } - - trace_gb_bundle_add(bundle); - - return 0; -} - -/* - * Tear down a previously set up bundle. - */ -void gb_bundle_destroy(struct gb_bundle *bundle) -{ - trace_gb_bundle_destroy(bundle); - - if (device_is_registered(&bundle->dev)) - device_del(&bundle->dev); - - list_del(&bundle->links); - - put_device(&bundle->dev); -} |