diff options
Diffstat (limited to 'drivers/media/rc/rc-main.c')
| -rw-r--r-- | drivers/media/rc/rc-main.c | 394 |
1 files changed, 333 insertions, 61 deletions
diff --git a/drivers/media/rc/rc-main.c b/drivers/media/rc/rc-main.c index 601d1ac1c68..970b93d6f39 100644 --- a/drivers/media/rc/rc-main.c +++ b/drivers/media/rc/rc-main.c @@ -1,6 +1,6 @@ /* rc-main.c - Remote Controller core module * - * Copyright (C) 2009-2010 by Mauro Carvalho Chehab <mchehab@redhat.com> + * Copyright (C) 2009-2010 by Mauro Carvalho Chehab * * 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 @@ -16,11 +16,16 @@ #include <linux/spinlock.h> #include <linux/delay.h> #include <linux/input.h> +#include <linux/leds.h> #include <linux/slab.h> #include <linux/device.h> #include <linux/module.h> #include "rc-core-priv.h" +/* Bitmap to store allocated device numbers from 0 to IRRCV_NUM_DEVICES - 1 */ +#define IRRCV_NUM_DEVICES 256 +static DECLARE_BITMAP(ir_core_dev_number, IRRCV_NUM_DEVICES); + /* Sizes are in bytes, 256 bytes allows for 32 entries on x64 */ #define IR_TAB_MIN_SIZE 256 #define IR_TAB_MAX_SIZE 8192 @@ -31,6 +36,7 @@ /* Used to keep track of known keymaps */ static LIST_HEAD(rc_map_list); static DEFINE_SPINLOCK(rc_map_lock); +static struct led_trigger *led_feedback; static struct rc_map_list *seek_rc_map(const char *name) { @@ -56,7 +62,7 @@ struct rc_map *rc_map_get(const char *name) map = seek_rc_map(name); #ifdef MODULE if (!map) { - int rc = request_module(name); + int rc = request_module("%s", name); if (rc < 0) { printk(KERN_ERR "Couldn't load IR keymap %s\n", name); return NULL; @@ -535,6 +541,7 @@ static void ir_do_keyup(struct rc_dev *dev, bool sync) IR_dprintk(1, "keyup key 0x%04x\n", dev->last_keycode); input_report_key(dev->input_dev, dev->last_keycode, 0); + led_trigger_event(led_feedback, LED_OFF); if (sync) input_sync(dev->input_dev); dev->keypressed = false; @@ -626,9 +633,9 @@ EXPORT_SYMBOL_GPL(rc_repeat); static void ir_do_keydown(struct rc_dev *dev, int scancode, u32 keycode, u8 toggle) { - bool new_event = !dev->keypressed || - dev->last_scancode != scancode || - dev->last_toggle != toggle; + bool new_event = (!dev->keypressed || + dev->last_scancode != scancode || + dev->last_toggle != toggle); if (new_event && dev->keypressed) ir_do_keyup(dev, false); @@ -646,6 +653,8 @@ static void ir_do_keydown(struct rc_dev *dev, int scancode, "key 0x%04x, scancode 0x%04x\n", dev->input_name, keycode, scancode); input_report_key(dev->input_dev, keycode, 1); + + led_trigger_event(led_feedback, LED_FULL); } input_sync(dev->input_dev); @@ -699,30 +708,61 @@ void rc_keydown_notimeout(struct rc_dev *dev, int scancode, u8 toggle) } EXPORT_SYMBOL_GPL(rc_keydown_notimeout); +int rc_open(struct rc_dev *rdev) +{ + int rval = 0; + + if (!rdev) + return -EINVAL; + + mutex_lock(&rdev->lock); + if (!rdev->users++ && rdev->open != NULL) + rval = rdev->open(rdev); + + if (rval) + rdev->users--; + + mutex_unlock(&rdev->lock); + + return rval; +} +EXPORT_SYMBOL_GPL(rc_open); + static int ir_open(struct input_dev *idev) { struct rc_dev *rdev = input_get_drvdata(idev); - return rdev->open(rdev); + return rc_open(rdev); } +void rc_close(struct rc_dev *rdev) +{ + if (rdev) { + mutex_lock(&rdev->lock); + + if (!--rdev->users && rdev->close != NULL) + rdev->close(rdev); + + mutex_unlock(&rdev->lock); + } +} +EXPORT_SYMBOL_GPL(rc_close); + static void ir_close(struct input_dev *idev) { struct rc_dev *rdev = input_get_drvdata(idev); - - if (rdev) - rdev->close(rdev); + rc_close(rdev); } /* class for /sys/class/rc */ -static char *ir_devnode(struct device *dev, umode_t *mode) +static char *rc_devnode(struct device *dev, umode_t *mode) { return kasprintf(GFP_KERNEL, "rc/%s", dev_name(dev)); } -static struct class ir_input_class = { +static struct class rc_class = { .name = "rc", - .devnode = ir_devnode, + .devnode = rc_devnode, }; /* @@ -751,18 +791,44 @@ static struct { RC_BIT_SONY20, "sony" }, { RC_BIT_RC5_SZ, "rc-5-sz" }, { RC_BIT_SANYO, "sanyo" }, + { RC_BIT_SHARP, "sharp" }, { RC_BIT_MCE_KBD, "mce_kbd" }, { RC_BIT_LIRC, "lirc" }, }; /** - * show_protocols() - shows the current IR protocol(s) + * struct rc_filter_attribute - Device attribute relating to a filter type. + * @attr: Device attribute. + * @type: Filter type. + * @mask: false for filter value, true for filter mask. + */ +struct rc_filter_attribute { + struct device_attribute attr; + enum rc_filter_type type; + bool mask; +}; +#define to_rc_filter_attr(a) container_of(a, struct rc_filter_attribute, attr) + +#define RC_PROTO_ATTR(_name, _mode, _show, _store, _type) \ + struct rc_filter_attribute dev_attr_##_name = { \ + .attr = __ATTR(_name, _mode, _show, _store), \ + .type = (_type), \ + } +#define RC_FILTER_ATTR(_name, _mode, _show, _store, _type, _mask) \ + struct rc_filter_attribute dev_attr_##_name = { \ + .attr = __ATTR(_name, _mode, _show, _store), \ + .type = (_type), \ + .mask = (_mask), \ + } + +/** + * show_protocols() - shows the current/wakeup IR protocol(s) * @device: 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 is trigged by reading /sys/class/rc/rc?/[wakeup_]protocols. * It returns the protocol names of supported protocols. * Enabled protocols are printed in brackets. * @@ -773,6 +839,7 @@ static ssize_t show_protocols(struct device *device, struct device_attribute *mattr, char *buf) { struct rc_dev *dev = to_rc_dev(device); + struct rc_filter_attribute *fattr = to_rc_filter_attr(mattr); u64 allowed, enabled; char *tmp = buf; int i; @@ -783,14 +850,16 @@ static ssize_t show_protocols(struct device *device, mutex_lock(&dev->lock); - if (dev->driver_type == RC_DRIVER_SCANCODE) { - enabled = dev->rc_map.rc_type; - allowed = dev->allowed_protos; - } else if (dev->raw) { - enabled = dev->raw->enabled_protocols; + enabled = dev->enabled_protocols[fattr->type]; + if (dev->driver_type == RC_DRIVER_SCANCODE || + fattr->type == RC_FILTER_WAKEUP) + allowed = dev->allowed_protocols[fattr->type]; + else if (dev->raw) allowed = ir_raw_get_allowed_protocols(); - } else + else { + mutex_unlock(&dev->lock); return -ENODEV; + } IR_dprintk(1, "allowed - 0x%llx, enabled - 0x%llx\n", (long long)allowed, @@ -816,14 +885,14 @@ static ssize_t show_protocols(struct device *device, } /** - * store_protocols() - changes the current IR protocol(s) + * store_protocols() - changes the current/wakeup IR protocol(s) * @device: 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 for changing the IR protocol type. - * It is trigged by writing to /sys/class/rc/rc?/protocols. + * It is trigged by writing to /sys/class/rc/rc?/[wakeup_]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". @@ -840,13 +909,16 @@ static ssize_t store_protocols(struct device *device, size_t len) { struct rc_dev *dev = to_rc_dev(device); + struct rc_filter_attribute *fattr = to_rc_filter_attr(mattr); bool enable, disable; const char *tmp; - u64 type; + u64 old_type, type; u64 mask; int rc, i, count = 0; - unsigned long flags; ssize_t ret; + int (*change_protocol)(struct rc_dev *dev, u64 *rc_type); + int (*set_filter)(struct rc_dev *dev, struct rc_scancode_filter *filter); + struct rc_scancode_filter local_filter, *filter; /* Device is being removed */ if (!dev) @@ -854,15 +926,13 @@ static ssize_t store_protocols(struct device *device, mutex_lock(&dev->lock); - if (dev->driver_type == RC_DRIVER_SCANCODE) - type = dev->rc_map.rc_type; - else if (dev->raw) - type = dev->raw->enabled_protocols; - else { + if (dev->driver_type != RC_DRIVER_SCANCODE && !dev->raw) { IR_dprintk(1, "Protocol switching not supported\n"); ret = -EINVAL; goto out; } + old_type = dev->enabled_protocols[fattr->type]; + type = old_type; while ((tmp = strsep((char **) &data, " \n")) != NULL) { if (!*tmp) @@ -890,7 +960,8 @@ static ssize_t store_protocols(struct device *device, if (i == ARRAY_SIZE(proto_names)) { IR_dprintk(1, "Unknown protocol: '%s'\n", tmp); - return -EINVAL; + ret = -EINVAL; + goto out; } count++; @@ -909,8 +980,10 @@ static ssize_t store_protocols(struct device *device, goto out; } - if (dev->change_protocol) { - rc = dev->change_protocol(dev, &type); + change_protocol = (fattr->type == RC_FILTER_NORMAL) + ? dev->change_protocol : dev->change_wakeup_protocol; + if (change_protocol) { + rc = change_protocol(dev, &type); if (rc < 0) { IR_dprintk(1, "Error setting protocols to 0x%llx\n", (long long)type); @@ -919,17 +992,39 @@ static ssize_t store_protocols(struct device *device, } } - if (dev->driver_type == RC_DRIVER_SCANCODE) { - spin_lock_irqsave(&dev->rc_map.lock, flags); - dev->rc_map.rc_type = type; - spin_unlock_irqrestore(&dev->rc_map.lock, flags); - } else { - dev->raw->enabled_protocols = type; - } - + dev->enabled_protocols[fattr->type] = type; IR_dprintk(1, "Current protocol(s): 0x%llx\n", (long long)type); + /* + * If the protocol is changed the filter needs updating. + * Try setting the same filter with the new protocol (if any). + * Fall back to clearing the filter. + */ + filter = &dev->scancode_filters[fattr->type]; + set_filter = (fattr->type == RC_FILTER_NORMAL) + ? dev->s_filter : dev->s_wakeup_filter; + + if (set_filter && old_type != type && filter->mask) { + local_filter = *filter; + if (!type) { + /* no protocol => clear filter */ + ret = -1; + } else { + /* hardware filtering => try setting, otherwise clear */ + ret = set_filter(dev, &local_filter); + } + if (ret < 0) { + /* clear the filter */ + local_filter.data = 0; + local_filter.mask = 0; + set_filter(dev, &local_filter); + } + + /* commit the new filter */ + *filter = local_filter; + } + ret = len; out: @@ -937,6 +1032,121 @@ out: return ret; } +/** + * show_filter() - shows the current scancode filter value or mask + * @device: the device descriptor + * @attr: the device attribute struct + * @buf: a pointer to the output buffer + * + * This routine is a callback routine to read a scancode filter value or mask. + * It is trigged by reading /sys/class/rc/rc?/[wakeup_]filter[_mask]. + * It prints the current scancode filter value or mask of the appropriate filter + * type in hexadecimal into @buf and returns the size of the buffer. + * + * Bits of the filter value corresponding to set bits in the filter mask are + * compared against input scancodes and non-matching scancodes are discarded. + * + * dev->lock is taken to guard against races between device registration, + * store_filter and show_filter. + */ +static ssize_t show_filter(struct device *device, + struct device_attribute *attr, + char *buf) +{ + struct rc_dev *dev = to_rc_dev(device); + struct rc_filter_attribute *fattr = to_rc_filter_attr(attr); + u32 val; + + /* Device is being removed */ + if (!dev) + return -EINVAL; + + mutex_lock(&dev->lock); + if ((fattr->type == RC_FILTER_NORMAL && !dev->s_filter) || + (fattr->type == RC_FILTER_WAKEUP && !dev->s_wakeup_filter)) + val = 0; + else if (fattr->mask) + val = dev->scancode_filters[fattr->type].mask; + else + val = dev->scancode_filters[fattr->type].data; + mutex_unlock(&dev->lock); + + return sprintf(buf, "%#x\n", val); +} + +/** + * store_filter() - changes the scancode filter value + * @device: the device descriptor + * @attr: the device attribute struct + * @buf: a pointer to the input buffer + * @len: length of the input buffer + * + * This routine is for changing a scancode filter value or mask. + * It is trigged by writing to /sys/class/rc/rc?/[wakeup_]filter[_mask]. + * Returns -EINVAL if an invalid filter value for the current protocol was + * specified or if scancode filtering is not supported by the driver, otherwise + * returns @len. + * + * Bits of the filter value corresponding to set bits in the filter mask are + * compared against input scancodes and non-matching scancodes are discarded. + * + * dev->lock is taken to guard against races between device registration, + * store_filter and show_filter. + */ +static ssize_t store_filter(struct device *device, + struct device_attribute *attr, + const char *buf, + size_t count) +{ + struct rc_dev *dev = to_rc_dev(device); + struct rc_filter_attribute *fattr = to_rc_filter_attr(attr); + struct rc_scancode_filter local_filter, *filter; + int ret; + unsigned long val; + int (*set_filter)(struct rc_dev *dev, struct rc_scancode_filter *filter); + + /* Device is being removed */ + if (!dev) + return -EINVAL; + + ret = kstrtoul(buf, 0, &val); + if (ret < 0) + return ret; + + /* Can the scancode filter be set? */ + set_filter = (fattr->type == RC_FILTER_NORMAL) ? dev->s_filter : + dev->s_wakeup_filter; + if (!set_filter) + return -EINVAL; + + mutex_lock(&dev->lock); + + /* Tell the driver about the new filter */ + filter = &dev->scancode_filters[fattr->type]; + local_filter = *filter; + if (fattr->mask) + local_filter.mask = val; + else + local_filter.data = val; + + if (!dev->enabled_protocols[fattr->type] && local_filter.mask) { + /* refuse to set a filter unless a protocol is enabled */ + ret = -EINVAL; + goto unlock; + } + + ret = set_filter(dev, &local_filter); + if (ret < 0) + goto unlock; + + /* Success, commit the new filter */ + *filter = local_filter; + +unlock: + mutex_unlock(&dev->lock); + return (ret < 0) ? ret : count; +} + static void rc_dev_release(struct device *device) { } @@ -966,25 +1176,58 @@ static int rc_dev_uevent(struct device *device, struct kobj_uevent_env *env) /* * Static device attribute struct with the sysfs attributes for IR's */ -static DEVICE_ATTR(protocols, S_IRUGO | S_IWUSR, - show_protocols, store_protocols); +static RC_PROTO_ATTR(protocols, S_IRUGO | S_IWUSR, + show_protocols, store_protocols, RC_FILTER_NORMAL); +static RC_PROTO_ATTR(wakeup_protocols, S_IRUGO | S_IWUSR, + show_protocols, store_protocols, RC_FILTER_WAKEUP); +static RC_FILTER_ATTR(filter, S_IRUGO|S_IWUSR, + show_filter, store_filter, RC_FILTER_NORMAL, false); +static RC_FILTER_ATTR(filter_mask, S_IRUGO|S_IWUSR, + show_filter, store_filter, RC_FILTER_NORMAL, true); +static RC_FILTER_ATTR(wakeup_filter, S_IRUGO|S_IWUSR, + show_filter, store_filter, RC_FILTER_WAKEUP, false); +static RC_FILTER_ATTR(wakeup_filter_mask, S_IRUGO|S_IWUSR, + show_filter, store_filter, RC_FILTER_WAKEUP, true); + +static struct attribute *rc_dev_protocol_attrs[] = { + &dev_attr_protocols.attr.attr, + NULL, +}; + +static struct attribute_group rc_dev_protocol_attr_grp = { + .attrs = rc_dev_protocol_attrs, +}; + +static struct attribute *rc_dev_wakeup_protocol_attrs[] = { + &dev_attr_wakeup_protocols.attr.attr, + NULL, +}; + +static struct attribute_group rc_dev_wakeup_protocol_attr_grp = { + .attrs = rc_dev_wakeup_protocol_attrs, +}; -static struct attribute *rc_dev_attrs[] = { - &dev_attr_protocols.attr, +static struct attribute *rc_dev_filter_attrs[] = { + &dev_attr_filter.attr.attr, + &dev_attr_filter_mask.attr.attr, NULL, }; -static struct attribute_group rc_dev_attr_grp = { - .attrs = rc_dev_attrs, +static struct attribute_group rc_dev_filter_attr_grp = { + .attrs = rc_dev_filter_attrs, +}; + +static struct attribute *rc_dev_wakeup_filter_attrs[] = { + &dev_attr_wakeup_filter.attr.attr, + &dev_attr_wakeup_filter_mask.attr.attr, + NULL, }; -static const struct attribute_group *rc_dev_attr_groups[] = { - &rc_dev_attr_grp, - NULL +static struct attribute_group rc_dev_wakeup_filter_attr_grp = { + .attrs = rc_dev_wakeup_filter_attrs, }; static struct device_type rc_dev_type = { - .groups = rc_dev_attr_groups, .release = rc_dev_release, .uevent = rc_dev_uevent, }; @@ -1013,7 +1256,7 @@ struct rc_dev *rc_allocate_device(void) setup_timer(&dev->timer_keyup, ir_timer_keyup, (unsigned long)dev); dev->dev.type = &rc_dev_type; - dev->dev.class = &ir_input_class; + dev->dev.class = &rc_class; device_initialize(&dev->dev); __module_get(THIS_MODULE); @@ -1039,10 +1282,9 @@ EXPORT_SYMBOL_GPL(rc_free_device); int rc_register_device(struct rc_dev *dev) { static bool raw_init = false; /* raw decoders loaded? */ - static atomic_t devno = ATOMIC_INIT(0); struct rc_map *rc_map; const char *path; - int rc; + int rc, devno, attr = 0; if (!dev || !dev->map_name) return -EINVAL; @@ -1062,16 +1304,33 @@ int rc_register_device(struct rc_dev *dev) if (dev->close) dev->input_dev->close = ir_close; + do { + devno = find_first_zero_bit(ir_core_dev_number, + IRRCV_NUM_DEVICES); + /* No free device slots */ + if (devno >= IRRCV_NUM_DEVICES) + return -ENOMEM; + } while (test_and_set_bit(devno, ir_core_dev_number)); + + dev->dev.groups = dev->sysfs_groups; + dev->sysfs_groups[attr++] = &rc_dev_protocol_attr_grp; + if (dev->s_filter) + dev->sysfs_groups[attr++] = &rc_dev_filter_attr_grp; + if (dev->s_wakeup_filter) + dev->sysfs_groups[attr++] = &rc_dev_wakeup_filter_attr_grp; + if (dev->change_wakeup_protocol) + dev->sysfs_groups[attr++] = &rc_dev_wakeup_protocol_attr_grp; + dev->sysfs_groups[attr++] = NULL; + /* * Take the lock here, as the device sysfs node will appear * when device_add() is called, which may trigger an ir-keytable udev - * rule, which will in turn call show_protocols and access either - * dev->rc_map.rc_type or dev->raw->enabled_protocols before it has - * been initialized. + * rule, which will in turn call show_protocols and access + * dev->enabled_protocols before it has been initialized. */ mutex_lock(&dev->lock); - dev->devno = (unsigned long)(atomic_inc_return(&devno) - 1); + dev->devno = devno; dev_set_name(&dev->dev, "rc%ld", dev->devno); dev_set_drvdata(&dev->dev, dev); rc = device_add(&dev->dev); @@ -1086,7 +1345,14 @@ int rc_register_device(struct rc_dev *dev) memcpy(&dev->input_dev->id, &dev->input_id, sizeof(dev->input_id)); dev->input_dev->phys = dev->input_phys; dev->input_dev->name = dev->input_name; + + /* input_register_device can call ir_open, so unlock mutex here */ + mutex_unlock(&dev->lock); + rc = input_register_device(dev->input_dev); + + mutex_lock(&dev->lock); + if (rc) goto out_table; @@ -1129,6 +1395,7 @@ int rc_register_device(struct rc_dev *dev) rc = dev->change_protocol(dev, &rc_type); if (rc < 0) goto out_raw; + dev->enabled_protocols[RC_FILTER_NORMAL] = rc_type; } mutex_unlock(&dev->lock); @@ -1153,6 +1420,7 @@ out_dev: device_del(&dev->dev); out_unlock: mutex_unlock(&dev->lock); + clear_bit(dev->devno, ir_core_dev_number); return rc; } EXPORT_SYMBOL_GPL(rc_register_device); @@ -1164,6 +1432,8 @@ void rc_unregister_device(struct rc_dev *dev) del_timer_sync(&dev->timer_keyup); + clear_bit(dev->devno, ir_core_dev_number); + if (dev->driver_type == RC_DRIVER_IR_RAW) ir_raw_event_unregister(dev); @@ -1187,12 +1457,13 @@ EXPORT_SYMBOL_GPL(rc_unregister_device); static int __init rc_core_init(void) { - int rc = class_register(&ir_input_class); + int rc = class_register(&rc_class); if (rc) { printk(KERN_ERR "rc_core: unable to register rc class\n"); return rc; } + led_trigger_register_simple("rc-feedback", &led_feedback); rc_map_register(&empty_map); return 0; @@ -1200,16 +1471,17 @@ static int __init rc_core_init(void) static void __exit rc_core_exit(void) { - class_unregister(&ir_input_class); + class_unregister(&rc_class); + led_trigger_unregister_simple(led_feedback); rc_map_unregister(&empty_map); } -module_init(rc_core_init); +subsys_initcall(rc_core_init); module_exit(rc_core_exit); int rc_core_debug; /* ir_debug level (0,1,2) */ EXPORT_SYMBOL_GPL(rc_core_debug); module_param_named(debug, rc_core_debug, int, 0644); -MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>"); +MODULE_AUTHOR("Mauro Carvalho Chehab"); MODULE_LICENSE("GPL"); |