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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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#include <linux/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_PMstatic 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)};
const 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_obj(*bundle); 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);}