+++ /dev/null
-/* ir-sysfs.c - sysfs interface for RC devices (/sys/class/rc)
- *
- * Copyright (C) 2009-2010 by Mauro Carvalho Chehab <mchehab@redhat.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#include <linux/slab.h>
-#include <linux/input.h>
-#include <linux/device.h>
-#include "ir-core-priv.h"
-
-#define IRRCV_NUM_DEVICES 256
-
-/* bit array to represent IR sysfs device number */
-static unsigned long ir_core_dev_number;
-
-/* class for /sys/class/rc */
-static char *ir_devnode(struct device *dev, mode_t *mode)
-{
- return kasprintf(GFP_KERNEL, "rc/%s", dev_name(dev));
-}
-
-static struct class ir_input_class = {
- .name = "rc",
- .devnode = ir_devnode,
-};
-
-static struct {
- u64 type;
- char *name;
-} proto_names[] = {
- { IR_TYPE_UNKNOWN, "unknown" },
- { IR_TYPE_RC5, "rc-5" },
- { IR_TYPE_NEC, "nec" },
- { IR_TYPE_RC6, "rc-6" },
- { IR_TYPE_JVC, "jvc" },
- { IR_TYPE_SONY, "sony" },
- { IR_TYPE_RC5_SZ, "rc-5-sz" },
- { IR_TYPE_LIRC, "lirc" },
-};
-
-#define PROTO_NONE "none"
-
-/**
- * show_protocols() - shows the current IR protocol(s)
- * @d: the device descriptor
- * @mattr: the device attribute struct (unused)
- * @buf: a pointer to the output buffer
- *
- * This routine is a callback routine for input read the IR protocol type(s).
- * it is trigged by reading /sys/class/rc/rc?/protocols.
- * It returns the protocol names of supported protocols.
- * Enabled protocols are printed in brackets.
- */
-static ssize_t show_protocols(struct device *d,
- struct device_attribute *mattr, char *buf)
-{
- struct ir_input_dev *ir_dev = dev_get_drvdata(d);
- u64 allowed, enabled;
- char *tmp = buf;
- int i;
-
- /* Device is being removed */
- if (!ir_dev)
- return -EINVAL;
-
- if (ir_dev->props && ir_dev->props->driver_type == RC_DRIVER_SCANCODE) {
- enabled = ir_dev->rc_tab.ir_type;
- allowed = ir_dev->props->allowed_protos;
- } else if (ir_dev->raw) {
- enabled = ir_dev->raw->enabled_protocols;
- allowed = ir_raw_get_allowed_protocols();
- } else
- return sprintf(tmp, "[builtin]\n");
-
- IR_dprintk(1, "allowed - 0x%llx, enabled - 0x%llx\n",
- (long long)allowed,
- (long long)enabled);
-
- for (i = 0; i < ARRAY_SIZE(proto_names); i++) {
- if (allowed & enabled & proto_names[i].type)
- tmp += sprintf(tmp, "[%s] ", proto_names[i].name);
- else if (allowed & proto_names[i].type)
- tmp += sprintf(tmp, "%s ", proto_names[i].name);
- }
-
- if (tmp != buf)
- tmp--;
- *tmp = '\n';
- return tmp + 1 - buf;
-}
-
-/**
- * store_protocols() - changes the current IR protocol(s)
- * @d: the device descriptor
- * @mattr: the device attribute struct (unused)
- * @buf: a pointer to the input buffer
- * @len: length of the input buffer
- *
- * This routine is a callback routine for changing the IR protocol type.
- * It is trigged by writing to /sys/class/rc/rc?/protocols.
- * Writing "+proto" will add a protocol to the list of enabled protocols.
- * Writing "-proto" will remove a protocol from the list of enabled protocols.
- * Writing "proto" will enable only "proto".
- * Writing "none" will disable all protocols.
- * Returns -EINVAL if an invalid protocol combination or unknown protocol name
- * is used, otherwise @len.
- */
-static ssize_t store_protocols(struct device *d,
- struct device_attribute *mattr,
- const char *data,
- size_t len)
-{
- struct ir_input_dev *ir_dev = dev_get_drvdata(d);
- bool enable, disable;
- const char *tmp;
- u64 type;
- u64 mask;
- int rc, i, count = 0;
- unsigned long flags;
-
- /* Device is being removed */
- if (!ir_dev)
- return -EINVAL;
-
- if (ir_dev->props && ir_dev->props->driver_type == RC_DRIVER_SCANCODE)
- type = ir_dev->rc_tab.ir_type;
- else if (ir_dev->raw)
- type = ir_dev->raw->enabled_protocols;
- else {
- IR_dprintk(1, "Protocol switching not supported\n");
- return -EINVAL;
- }
-
- while ((tmp = strsep((char **) &data, " \n")) != NULL) {
- if (!*tmp)
- break;
-
- if (*tmp == '+') {
- enable = true;
- disable = false;
- tmp++;
- } else if (*tmp == '-') {
- enable = false;
- disable = true;
- tmp++;
- } else {
- enable = false;
- disable = false;
- }
-
- if (!enable && !disable && !strncasecmp(tmp, PROTO_NONE, sizeof(PROTO_NONE))) {
- tmp += sizeof(PROTO_NONE);
- mask = 0;
- count++;
- } else {
- for (i = 0; i < ARRAY_SIZE(proto_names); i++) {
- if (!strncasecmp(tmp, proto_names[i].name, strlen(proto_names[i].name))) {
- tmp += strlen(proto_names[i].name);
- mask = proto_names[i].type;
- break;
- }
- }
- if (i == ARRAY_SIZE(proto_names)) {
- IR_dprintk(1, "Unknown protocol: '%s'\n", tmp);
- return -EINVAL;
- }
- count++;
- }
-
- if (enable)
- type |= mask;
- else if (disable)
- type &= ~mask;
- else
- type = mask;
- }
-
- if (!count) {
- IR_dprintk(1, "Protocol not specified\n");
- return -EINVAL;
- }
-
- if (ir_dev->props && ir_dev->props->change_protocol) {
- rc = ir_dev->props->change_protocol(ir_dev->props->priv,
- type);
- if (rc < 0) {
- IR_dprintk(1, "Error setting protocols to 0x%llx\n",
- (long long)type);
- return -EINVAL;
- }
- }
-
- if (ir_dev->props && ir_dev->props->driver_type == RC_DRIVER_SCANCODE) {
- spin_lock_irqsave(&ir_dev->rc_tab.lock, flags);
- ir_dev->rc_tab.ir_type = type;
- spin_unlock_irqrestore(&ir_dev->rc_tab.lock, flags);
- } else {
- ir_dev->raw->enabled_protocols = type;
- }
-
- IR_dprintk(1, "Current protocol(s): 0x%llx\n",
- (long long)type);
-
- return len;
-}
-
-#define ADD_HOTPLUG_VAR(fmt, val...) \
- do { \
- int err = add_uevent_var(env, fmt, val); \
- if (err) \
- return err; \
- } while (0)
-
-static int rc_dev_uevent(struct device *device, struct kobj_uevent_env *env)
-{
- struct ir_input_dev *ir_dev = dev_get_drvdata(device);
-
- if (ir_dev->rc_tab.name)
- ADD_HOTPLUG_VAR("NAME=%s", ir_dev->rc_tab.name);
- if (ir_dev->driver_name)
- ADD_HOTPLUG_VAR("DRV_NAME=%s", ir_dev->driver_name);
-
- return 0;
-}
-
-/*
- * Static device attribute struct with the sysfs attributes for IR's
- */
-static DEVICE_ATTR(protocols, S_IRUGO | S_IWUSR,
- show_protocols, store_protocols);
-
-static struct attribute *rc_dev_attrs[] = {
- &dev_attr_protocols.attr,
- NULL,
-};
-
-static struct attribute_group rc_dev_attr_grp = {
- .attrs = rc_dev_attrs,
-};
-
-static const struct attribute_group *rc_dev_attr_groups[] = {
- &rc_dev_attr_grp,
- NULL
-};
-
-static struct device_type rc_dev_type = {
- .groups = rc_dev_attr_groups,
- .uevent = rc_dev_uevent,
-};
-
-/**
- * ir_register_class() - creates the sysfs for /sys/class/rc/rc?
- * @input_dev: the struct input_dev descriptor of the device
- *
- * This routine is used to register the syfs code for IR class
- */
-int ir_register_class(struct input_dev *input_dev)
-{
- struct ir_input_dev *ir_dev = input_get_drvdata(input_dev);
- int devno = find_first_zero_bit(&ir_core_dev_number,
- IRRCV_NUM_DEVICES);
-
- if (unlikely(devno < 0))
- return devno;
-
- ir_dev->dev.type = &rc_dev_type;
- ir_dev->devno = devno;
-
- ir_dev->dev.class = &ir_input_class;
- ir_dev->dev.parent = input_dev->dev.parent;
- input_dev->dev.parent = &ir_dev->dev;
- dev_set_name(&ir_dev->dev, "rc%d", devno);
- dev_set_drvdata(&ir_dev->dev, ir_dev);
- return device_register(&ir_dev->dev);
-};
-
-/**
- * ir_register_input - registers ir input device with input subsystem
- * @input_dev: the struct input_dev descriptor of the device
- */
-
-int ir_register_input(struct input_dev *input_dev)
-{
- struct ir_input_dev *ir_dev = input_get_drvdata(input_dev);
- int rc;
- const char *path;
-
-
- rc = input_register_device(input_dev);
- if (rc < 0) {
- device_del(&ir_dev->dev);
- return rc;
- }
-
- __module_get(THIS_MODULE);
-
- path = kobject_get_path(&ir_dev->dev.kobj, GFP_KERNEL);
- printk(KERN_INFO "%s: %s as %s\n",
- dev_name(&ir_dev->dev),
- input_dev->name ? input_dev->name : "Unspecified device",
- path ? path : "N/A");
- kfree(path);
-
- set_bit(ir_dev->devno, &ir_core_dev_number);
- return 0;
-}
-
-/**
- * ir_unregister_class() - removes the sysfs for sysfs for
- * /sys/class/rc/rc?
- * @input_dev: the struct input_dev descriptor of the device
- *
- * This routine is used to unregister the syfs code for IR class
- */
-void ir_unregister_class(struct input_dev *input_dev)
-{
- struct ir_input_dev *ir_dev = input_get_drvdata(input_dev);
-
- input_set_drvdata(input_dev, NULL);
- clear_bit(ir_dev->devno, &ir_core_dev_number);
- input_unregister_device(input_dev);
- device_del(&ir_dev->dev);
-
- module_put(THIS_MODULE);
-}
-
-/*
- * Init/exit code for the module. Basically, creates/removes /sys/class/rc
- */
-
-static int __init ir_core_init(void)
-{
- int rc = class_register(&ir_input_class);
- if (rc) {
- printk(KERN_ERR "ir_core: unable to register rc class\n");
- return rc;
- }
-
- /* Initialize/load the decoders/keymap code that will be used */
- ir_raw_init();
- ir_rcmap_init();
-
- return 0;
-}
-
-static void __exit ir_core_exit(void)
-{
- class_unregister(&ir_input_class);
- ir_rcmap_cleanup();
-}
-
-module_init(ir_core_init);
-module_exit(ir_core_exit);
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