![Greg Kroah-Hartman](/assets/img/avatar_default.png)
This fixes up a number of coding style issues in the firmware sample files. Yeah, it still doesn't build properly yet, that's next... Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
205 lines
4.9 KiB
C
205 lines
4.9 KiB
C
/*
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* firmware_sample_firmware_class.c -
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*
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* Copyright (c) 2003 Manuel Estrada Sainz
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*
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* NOTE: This is just a probe of concept, if you think that your driver would
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* be well served by this mechanism please contact me first.
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*
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* DON'T USE THIS CODE AS IS
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*
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*/
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/timer.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/firmware.h>
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MODULE_AUTHOR("Manuel Estrada Sainz");
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MODULE_DESCRIPTION("Hackish sample for using firmware class directly");
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MODULE_LICENSE("GPL");
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static inline struct class_device *to_class_dev(struct kobject *obj)
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{
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return container_of(obj, struct class_device, kobj);
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}
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static inline
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struct class_device_attribute *to_class_dev_attr(struct attribute *_attr)
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{
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return container_of(_attr, struct class_device_attribute, attr);
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}
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struct firmware_priv {
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char fw_id[FIRMWARE_NAME_MAX];
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s32 loading:2;
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u32 abort:1;
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};
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static ssize_t firmware_loading_show(struct class_device *class_dev, char *buf)
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{
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struct firmware_priv *fw_priv = class_get_devdata(class_dev);
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return sprintf(buf, "%d\n", fw_priv->loading);
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}
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static ssize_t firmware_loading_store(struct class_device *class_dev,
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const char *buf, size_t count)
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{
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struct firmware_priv *fw_priv = class_get_devdata(class_dev);
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int prev_loading = fw_priv->loading;
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fw_priv->loading = simple_strtol(buf, NULL, 10);
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switch (fw_priv->loading) {
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case -1:
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/* abort load an panic */
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break;
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case 1:
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/* setup load */
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break;
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case 0:
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if (prev_loading == 1) {
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/* finish load and get the device back to working
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* state */
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}
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break;
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}
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return count;
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}
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static CLASS_DEVICE_ATTR(loading, 0644,
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firmware_loading_show, firmware_loading_store);
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static ssize_t firmware_data_read(struct kobject *kobj,
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struct bin_attribute *bin_attr,
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char *buffer, loff_t offset, size_t count)
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{
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struct class_device *class_dev = to_class_dev(kobj);
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struct firmware_priv *fw_priv = class_get_devdata(class_dev);
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/* read from the devices firmware memory */
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return count;
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}
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static ssize_t firmware_data_write(struct kobject *kobj,
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struct bin_attribute *bin_attr,
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char *buffer, loff_t offset, size_t count)
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{
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struct class_device *class_dev = to_class_dev(kobj);
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struct firmware_priv *fw_priv = class_get_devdata(class_dev);
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/* write to the devices firmware memory */
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return count;
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}
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static struct bin_attribute firmware_attr_data = {
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.attr = {.name = "data", .mode = 0644},
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.size = 0,
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.read = firmware_data_read,
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.write = firmware_data_write,
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};
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static int fw_setup_class_device(struct class_device *class_dev,
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const char *fw_name,
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struct device *device)
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{
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int retval;
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struct firmware_priv *fw_priv;
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fw_priv = kzalloc(sizeof(struct firmware_priv), GFP_KERNEL);
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if (!fw_priv) {
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retval = -ENOMEM;
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goto out;
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}
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memset(class_dev, 0, sizeof(*class_dev));
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strncpy(fw_priv->fw_id, fw_name, FIRMWARE_NAME_MAX);
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fw_priv->fw_id[FIRMWARE_NAME_MAX-1] = '\0';
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strncpy(class_dev->class_id, device->bus_id, BUS_ID_SIZE);
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class_dev->class_id[BUS_ID_SIZE-1] = '\0';
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class_dev->dev = device;
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class_dev->class = &firmware_class,
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class_set_devdata(class_dev, fw_priv);
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retval = class_device_register(class_dev);
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if (retval) {
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printk(KERN_ERR "%s: class_device_register failed\n",
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__func__);
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goto error_free_fw_priv;
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}
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retval = sysfs_create_bin_file(&class_dev->kobj, &firmware_attr_data);
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if (retval) {
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printk(KERN_ERR "%s: sysfs_create_bin_file failed\n",
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__func__);
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goto error_unreg_class_dev;
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}
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retval = class_device_create_file(class_dev,
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&class_device_attr_loading);
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if (retval) {
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printk(KERN_ERR "%s: class_device_create_file failed\n",
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__func__);
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goto error_remove_data;
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}
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goto out;
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error_remove_data:
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sysfs_remove_bin_file(&class_dev->kobj, &firmware_attr_data);
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error_unreg_class_dev:
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class_device_unregister(class_dev);
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error_free_fw_priv:
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kfree(fw_priv);
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out:
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return retval;
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}
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static void fw_remove_class_device(struct class_device *class_dev)
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{
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struct firmware_priv *fw_priv = class_get_devdata(class_dev);
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class_device_remove_file(class_dev, &class_device_attr_loading);
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sysfs_remove_bin_file(&class_dev->kobj, &firmware_attr_data);
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class_device_unregister(class_dev);
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}
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static struct class_device *class_dev;
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static struct device my_device = {
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.bus_id = "my_dev0",
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};
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static int __init firmware_sample_init(void)
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{
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int error;
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device_initialize(&my_device);
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class_dev = kmalloc(sizeof(struct class_device), GFP_KERNEL);
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if (!class_dev)
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return -ENOMEM;
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error = fw_setup_class_device(class_dev, "my_firmware_image",
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&my_device);
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if (error) {
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kfree(class_dev);
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return error;
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}
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return 0;
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}
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static void __exit firmware_sample_exit(void)
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{
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struct firmware_priv *fw_priv = class_get_devdata(class_dev);
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fw_remove_class_device(class_dev);
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kfree(fw_priv);
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kfree(class_dev);
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}
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module_init(firmware_sample_init);
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module_exit(firmware_sample_exit);
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