[media] rc-core: Merge rc-sysfs.c into rc-main.c

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 347 insertions, 2 deletions

diff --git a/drivers/media/rc/rc-main.c b/drivers/media/rc/rc-main.c
index d6de2e25315e..d7726776f937 100644
--- a/drivers/media/rc/rc-main.c
+++ b/drivers/media/rc/rc-main.c
@@ -1,6 +1,6 @@
-/* ir-keytable.c - handle IR scancode->keycode tables
+/* rc-core.c - handle IR scancode->keycode tables
  *
- * Copyright (C) 2009 by Mauro Carvalho Chehab <mchehab@redhat.com>
+ * 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
@@ -15,8 +15,14 @@
 
 #include <linux/input.h>
 #include <linux/slab.h>
+#include <linux/device.h>
 #include "rc-core-priv.h"
 
+#define IRRCV_NUM_DEVICES       256
+
+/* bit array to represent IR sysfs device number */
+static unsigned long ir_core_dev_number;
+
 /* Sizes are in bytes, 256 bytes allows for 32 entries on x64 */
 #define IR_TAB_MIN_SIZE 256
 #define IR_TAB_MAX_SIZE 8192
@@ -758,6 +764,345 @@ void ir_input_unregister(struct input_dev *input_dev)
 }
 EXPORT_SYMBOL_GPL(ir_input_unregister);
 
+/* 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);
+
 int ir_core_debug;    /* ir_debug level (0,1,2) */
 EXPORT_SYMBOL_GPL(ir_core_debug);
 module_param_named(debug, ir_core_debug, int, 0644);