| /* |
| * Greybus sysfs file functions |
| * |
| * Copyright 2014 Google Inc. |
| * |
| * Released under the GPLv2 only. |
| */ |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include <linux/types.h> |
| #include <linux/module.h> |
| #include <linux/moduleparam.h> |
| #include <linux/kernel.h> |
| #include <linux/slab.h> |
| #include <linux/kthread.h> |
| #include <linux/device.h> |
| |
| #include "greybus.h" |
| |
| /* Function fields */ |
| #define greybus_function_attr(field) \ |
| static ssize_t function_##field##_show(struct device *dev, \ |
| struct device_attribute *attr, \ |
| char *buf) \ |
| { \ |
| struct greybus_device *gdev = to_greybus_device(dev); \ |
| return sprintf(buf, "%d\n", gdev->function.field); \ |
| } \ |
| static DEVICE_ATTR_RO(function_##field) |
| |
| greybus_function_attr(number); |
| greybus_function_attr(cport); |
| greybus_function_attr(class); |
| greybus_function_attr(subclass); |
| greybus_function_attr(protocol); |
| |
| static struct attribute *function_attrs[] = { |
| &dev_attr_function_number.attr, |
| &dev_attr_function_cport.attr, |
| &dev_attr_function_class.attr, |
| &dev_attr_function_subclass.attr, |
| &dev_attr_function_protocol.attr, |
| NULL, |
| }; |
| |
| static umode_t function_attrs_are_visible(struct kobject *kobj, |
| struct attribute *a, int n) |
| { |
| struct greybus_device *gdev = to_greybus_device(kobj_to_dev(kobj)); |
| |
| // FIXME - make this a dynamic structure to "know" if it really is here |
| // or not easier? |
| if (gdev->function.number || |
| gdev->function.cport || |
| gdev->function.class || |
| gdev->function.subclass || |
| gdev->function.protocol) |
| return a->mode; |
| return 0; |
| } |
| |
| static struct attribute_group function_attr_grp = { |
| .attrs = function_attrs, |
| .is_visible = function_attrs_are_visible, |
| }; |
| |
| /* Module fields */ |
| #define greybus_module_attr(field) \ |
| static ssize_t module_##field##_show(struct device *dev, \ |
| struct device_attribute *attr, \ |
| char *buf) \ |
| { \ |
| struct greybus_device *gdev = to_greybus_device(dev); \ |
| return sprintf(buf, "%x\n", gdev->module_id.field); \ |
| } \ |
| static DEVICE_ATTR_RO(module_##field) |
| |
| greybus_module_attr(vendor); |
| greybus_module_attr(product); |
| greybus_module_attr(version); |
| |
| static ssize_t module_vendor_string_show(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct greybus_device *gdev = to_greybus_device(dev); |
| return sprintf(buf, "%s", |
| greybus_string(gdev, gdev->module_id.vendor_stringid)); |
| } |
| static DEVICE_ATTR_RO(module_vendor_string); |
| |
| static ssize_t module_product_string_show(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct greybus_device *gdev = to_greybus_device(dev); |
| return sprintf(buf, "%s", |
| greybus_string(gdev, gdev->module_id.product_stringid)); |
| } |
| static DEVICE_ATTR_RO(module_product_string); |
| |
| static struct attribute *module_attrs[] = { |
| &dev_attr_module_vendor.attr, |
| &dev_attr_module_product.attr, |
| &dev_attr_module_version.attr, |
| &dev_attr_module_vendor_string.attr, |
| &dev_attr_module_product_string.attr, |
| NULL, |
| }; |
| |
| static umode_t module_attrs_are_visible(struct kobject *kobj, |
| struct attribute *a, int n) |
| { |
| struct greybus_device *gdev = to_greybus_device(kobj_to_dev(kobj)); |
| |
| if ((a == &dev_attr_module_vendor_string.attr) && |
| (gdev->module_id.vendor_stringid)) |
| return a->mode; |
| if ((a == &dev_attr_module_product_string.attr) && |
| (gdev->module_id.product_stringid)) |
| return a->mode; |
| |
| // FIXME - make this a dynamic structure to "know" if it really is here |
| // or not easier? |
| if (gdev->module_id.vendor || |
| gdev->module_id.product || |
| gdev->module_id.version) |
| return a->mode; |
| return 0; |
| } |
| |
| static struct attribute_group module_attr_grp = { |
| .attrs = module_attrs, |
| .is_visible = module_attrs_are_visible, |
| }; |
| |
| |
| /* Serial Number */ |
| static ssize_t serial_number_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct greybus_device *gdev = to_greybus_device(dev); |
| return sprintf(buf, "%llX\n", |
| (unsigned long long)gdev->serial_number.serial_number); |
| } |
| static DEVICE_ATTR_RO(serial_number); |
| |
| static struct attribute *serial_number_attrs[] = { |
| &dev_attr_serial_number.attr, |
| NULL, |
| }; |
| |
| static struct attribute_group serial_number_attr_grp = { |
| .attrs = serial_number_attrs, |
| .is_visible = function_attrs_are_visible, |
| }; |
| |
| |
| const struct attribute_group *greybus_module_groups[] = { |
| &function_attr_grp, |
| &module_attr_grp, |
| &serial_number_attr_grp, |
| NULL, |
| }; |
| |