[IR-RFC PATCH v4 1/6] Minimal changes to the core input system

Jon Smirl
2009-11-27T01:34:31Z

Minimal changes to the core input system. The bulk of IR support loads as a module. These changes are passive if the rest of IR isn't loaded.

Jon Smirl
<jonsmirl@gmail.com>
---
drivers/input/input.c | 17 +++++++++
include/linux/input.h | 75 +++++++++++++++++++++++++++++++++++++++
include/linux/mod_devicetable.h | 3 ++
3 files changed, 95 insertions(+), 0 deletions(-)

diff --git a/drivers/input/input.c b/drivers/input/input.c
index 7c237e6..a531cf5 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -274,6 +274,10 @@ static void input_handle_event(struct input_dev *dev,
case EV_PWR:
disposition = INPUT_PASS_TO_ALL;
break;
+
+ case EV_IR:
+ disposition = INPUT_PASS_TO_ALL;
+ break;
}

if (disposition != INPUT_IGNORE_EVENT && type != EV_SYN)
@@ -727,6 +731,7 @@ static const struct input_device_id *input_match_device(const struct input_devic
MATCH_BIT(sndbit, SND_MAX);
MATCH_BIT(ffbit, FF_MAX);
MATCH_BIT(swbit, SW_MAX);
+ MATCH_BIT(irbit, IR_MAX);

return id;
}
@@ -849,6 +854,8 @@ static int input_devices_seq_show(struct seq_file *seq, void *v)
input_seq_print_bitmap(seq, "FF", dev->ffbit, FF_MAX);
if (test_bit(EV_SW, dev->evbit))
input_seq_print_bitmap(seq, "SW", dev->swbit, SW_MAX);
+ if (test_bit(EV_IR, dev->evbit))
+ input_seq_print_bitmap(seq, "IR", dev->irbit, IR_MAX);

seq_putc(seq, '\n');

@@ -1024,6 +1031,8 @@ static int input_print_modalias(char *buf, int size, struct input_dev *id,
'f', id->ffbit, 0, FF_MAX);
len += input_print_modalias_bits(buf + len, size - len,
'w', id->swbit, 0, SW_MAX);
+ len += input_print_modalias_bits(buf + len, size - len,
+ 'i', id->irbit, 0, IR_MAX);

if (add_cr)
len += snprintf(buf + len, max(size - len, 0), "\n");
@@ -1125,6 +1134,7 @@ INPUT_DEV_CAP_ATTR(LED, led);
INPUT_DEV_CAP_ATTR(SND, snd);
INPUT_DEV_CAP_ATTR(FF, ff);
INPUT_DEV_CAP_ATTR(SW, sw);
+INPUT_DEV_CAP_ATTR(IR, ir);

static struct attribute *input_dev_caps_attrs[] = {
&dev_attr_ev.attr,
@@ -1136,6 +1146,7 @@ static struct attribute *input_dev_caps_attrs[] = {
&dev_attr_snd.attr,
&dev_attr_ff.attr,
&dev_attr_sw.attr,
+ &dev_attr_ir.attr,
NULL
};

@@ -1253,6 +1264,8 @@ static int input_dev_uevent(struct device *device, struct kobj_uevent_env *env)
INPUT_ADD_HOTPLUG_BM_VAR("FF=", dev->ffbit, FF_MAX);
if (test_bit(EV_SW, dev->evbit))
INPUT_ADD_HOTPLUG_BM_VAR("SW=", dev->swbit, SW_MAX);
+ if (test_bit(EV_IR, dev->evbit))
+ INPUT_ADD_HOTPLUG_BM_VAR("IR=", dev->irbit, IR_MAX);

INPUT_ADD_HOTPLUG_MODALIAS_VAR(dev);

@@ -1371,6 +1384,10 @@ void input_set_capability(struct input_dev *dev, unsigned int type, unsigned int
__set_bit(code, dev->ffbit);
break;

+ case EV_IR:
+ __set_bit(code, dev->irbit);
+ break;
+
case EV_PWR:
/* do nothing */
break;
diff --git a/include/linux/input.h b/include/linux/input.h
index 8b3bc3e..159a99d 100644
--- a/include/linux/input.h
+++ b/include/linux/input.h
@@ -80,6 +80,8 @@ struct input_absinfo {
#define EVIOCRMFF _IOW('E', 0x81, int) /* Erase a force effect */
#define EVIOCGEFFECTS _IOR('E', 0x84, int) /* Report number of effects playable at the same time */

+#define EVIOIRSEND _IOC(_IOC_WRITE, 'E', 0x80, sizeof(struct ir_command)) /* send an IR command */
+
#define EVIOCGRAB _IOW('E', 0x90, int) /* Grab/Release device */

/*
@@ -98,6 +100,7 @@ struct input_absinfo {
#define EV_FF 0x15
#define EV_PWR 0x16
#define EV_FF_STATUS 0x17
+#define EV_IR 0x18
#define EV_MAX 0x1f
#define EV_CNT (EV_MAX+1)

@@ -985,6 +988,56 @@ struct ff_effect {
#define FF_MAX 0x7f
#define FF_CNT (FF_MAX+1)

+/*
+ * IR Support
+ */
+
+#define IR_PROTOCOL_RESERVED 0
+#define IR_PROTOCOL_JVC 1
+#define IR_PROTOCOL_NEC 2
+#define IR_PROTOCOL_NOKIA 3
+#define IR_PROTOCOL_SHARP 4
+#define IR_PROTOCOL_SONY_12 5
+#define IR_PROTOCOL_SONY_15 6
+#define IR_PROTOCOL_SONY_20 7
+#define IR_PROTOCOL_PHILIPS_RC5 8
+#define IR_PROTOCOL_PHILIPS_RC6 9
+#define IR_PROTOCOL_PHILIPS_RCMM 10
+#define IR_PROTOCOL_PHILIPS_RECS80 11
+#define IR_PROTOCOL_RCA 12
+#define IR_PROTOCOL_ITT 13
+
+#define IR_PROTOCOL 1
+#define IR_DEVICE 2
+#define IR_COMMAND 3
+
+#define IR_CAP_RECEIVE_BASEBAND 0
+#define IR_CAP_RECEIVE_36K 1
+#define IR_CAP_RECEIVE_38K 2
+#define IR_CAP_RECEIVE_40K 3
+#define IR_CAP_RECEIVE_56K 4
+#define IR_CAP_SEND_BASEBAND 5
+#define IR_CAP_SEND_36K 6
+#define IR_CAP_SEND_38K 7
+#define IR_CAP_SEND_40K 8
+#define IR_CAP_SEND_56K 9
+#define IR_CAP_XMITTER_1 10
+#define IR_CAP_XMITTER_2 11
+#define IR_CAP_XMITTER_3 12
+#define IR_CAP_XMITTER_4 13
+#define IR_CAP_RECEIVE_RAW 14
+#define IR_CAP_SEND_RAW 15
+#define IR_MAX 0x0f
+#define IR_CNT IR_MAX + 1
+
+struct ir_command {
+ __u32 protocol;
+ __u32 device;
+ __u32 command;
+ __u32 transmitters;
+};
+
+
#ifdef __KERNEL__

/*
@@ -1012,6 +1065,7 @@ struct ff_effect {
* @sndbit: bitmap of sound effects supported by the device
* @ffbit: bitmap of force feedback effects supported by the device
* @swbit: bitmap of switches present on the device
+ * @irbit: bitmap of capabilies of the IR hardware
* @keycodemax: size of keycode table
* @keycodesize: size of elements in keycode table
* @keycode: map of scancodes to keycodes for this device
@@ -1084,6 +1138,7 @@ struct input_dev {
unsigned long sndbit[BITS_TO_LONGS(SND_CNT)];
unsigned long ffbit[BITS_TO_LONGS(FF_CNT)];
unsigned long swbit[BITS_TO_LONGS(SW_CNT)];
+ unsigned long irbit[BITS_TO_LONGS(IR_CNT)];

unsigned int keycodemax;
unsigned int keycodesize;
@@ -1092,6 +1147,7 @@ struct input_dev {
int (*getkeycode)(struct input_dev *dev, int scancode, int *keycode);

struct ff_device *ff;
+ struct ir_device *ir;

unsigned int repeat_key;
struct timer_list timer;
@@ -1328,6 +1384,11 @@ static inline void input_report_switch(struct input_dev *dev, unsigned int code,
input_event(dev, EV_SW, code, !!value);
}

+static inline void input_report_ir(struct input_dev *dev, unsigned int code, int value)
+{
+ input_event(dev, EV_IR, code, value);
+}
+
static inline void input_sync(struct input_dev *dev)
{
input_event(dev, EV_SYN, SYN_REPORT, 0);
@@ -1411,5 +1472,19 @@ int input_ff_erase(struct input_dev *dev, int effect_id, struct file *file);
int input_ff_create_memless(struct input_dev *dev, void *data,
int (*play_effect)(struct input_dev *, void *, struct ff_effect *));

+/**
+ * IR support functions
+ */
+
+typedef int (*send_func)(void *private, unsigned int *buffer, unsigned int count,
+ unsigned int frequency, unsigned int xmitters);
+
+int input_ir_create(struct input_dev *dev, void *private, send_func send);
+void input_ir_destroy(struct input_dev *dev);
+
+void input_ir_decode(struct input_dev *dev, unsigned int delta, unsigned int bit);
+int input_ir_send(struct input_dev *dev, struct ir_command *ir_command, struct file *file);
+int input_ir_register(struct input_dev *dev);
+
#endif
#endif
diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
index 1bf5900..2bdf253 100644
--- a/include/linux/mod_devicetable.h
+++ b/include/linux/mod_devicetable.h
@@ -293,6 +293,7 @@ struct pcmcia_device_id {
#define INPUT_DEVICE_ID_SND_MAX 0x07
#define INPUT_DEVICE_ID_FF_MAX 0x7f
#define INPUT_DEVICE_ID_SW_MAX 0x0f
+#define INPUT_DEVICE_ID_IR_MAX 0x0f

#define INPUT_DEVICE_ID_MATCH_BUS 1
#define INPUT_DEVICE_ID_MATCH_VENDOR 2
@@ -308,6 +309,7 @@ struct pcmcia_device_id {
#define INPUT_DEVICE_ID_MATCH_SNDBIT 0x0400
#define INPUT_DEVICE_ID_MATCH_FFBIT 0x0800
#define INPUT_DEVICE_ID_MATCH_SWBIT 0x1000
+#define INPUT_DEVICE_ID_MATCH_IRBIT 0x2000

struct input_device_id {

@@ -327,6 +329,7 @@ struct input_device_id {
kernel_ulong_t sndbit[INPUT_DEVICE_ID_SND_MAX / BITS_PER_LONG + 1];
kernel_ulong_t ffbit[INPUT_DEVICE_ID_FF_MAX / BITS_PER_LONG + 1];
kernel_ulong_t swbit[INPUT_DEVICE_ID_SW_MAX / BITS_PER_LONG + 1];
+ kernel_ulong_t irbit[INPUT_DEVICE_ID_IR_MAX / BITS_PER_LONG + 1];

kernel_ulong_t driver_info;
};