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Date: Sun, 19 Aug 2012 19:32:54 +0200
From: Bruno Prémont <bonbons@...ux-vserver.org>
To: Jiri Kosina <jkosina@...e.cz>,
Mauro Carvalho Chehab <mchehab@...hat.com>
Cc: linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-media@...r.kernel.org
Subject: [PATCH 3/6] HID: picoLCD: Add support for CIR
Implement support for picoLCD's CIR header using RC_CORE for decoding
the IR event stream.
Signed-off-by: Bruno Prémont <bonbons@...ux-vserver.org>
---
drivers/hid/hid-picolcd.h | 5 ++-
drivers/hid/hid-picolcd_cir.c | 95 +++++++++++++++++++++++++++++++++++++++-
drivers/hid/hid-picolcd_core.c | 3 +-
3 files changed, 98 insertions(+), 5 deletions(-)
diff --git a/drivers/hid/hid-picolcd.h b/drivers/hid/hid-picolcd.h
index dc4c795..240eb1c 100644
--- a/drivers/hid/hid-picolcd.h
+++ b/drivers/hid/hid-picolcd.h
@@ -85,7 +85,9 @@ struct picolcd_data {
/* input stuff */
u8 pressed_keys[2];
struct input_dev *input_keys;
- struct input_dev *input_cir;
+#ifdef CONFIG_HID_PICOLCD_CIR
+ struct rc_dev *rc_dev;
+#endif
unsigned short keycode[PICOLCD_KEYS];
#ifdef CONFIG_HID_PICOLCD_FB
@@ -114,6 +116,7 @@ struct picolcd_data {
int status;
#define PICOLCD_BOOTLOADER 1
#define PICOLCD_FAILED 2
+#define PICOLCD_CIR_SHUN 4
};
#ifdef CONFIG_HID_PICOLCD_FB
diff --git a/drivers/hid/hid-picolcd_cir.c b/drivers/hid/hid-picolcd_cir.c
index dc632c3..f38af30 100644
--- a/drivers/hid/hid-picolcd_cir.c
+++ b/drivers/hid/hid-picolcd_cir.c
@@ -37,6 +37,7 @@
#include <linux/completion.h>
#include <linux/uaccess.h>
#include <linux/module.h>
+#include <media/rc-core.h>
#include "hid-picolcd.h"
@@ -44,18 +45,108 @@
int picolcd_raw_cir(struct picolcd_data *data,
struct hid_report *report, u8 *raw_data, int size)
{
- /* Need understanding of CIR data format to implement ... */
+ unsigned long flags;
+ int i, w, sz;
+ DEFINE_IR_RAW_EVENT(rawir);
+
+ /* ignore if rc_dev is NULL or status is shunned */
+ spin_lock_irqsave(&data->lock, flags);
+ if (data->rc_dev && (data->status & PICOLCD_CIR_SHUN)) {
+ spin_unlock_irqrestore(&data->lock, flags);
+ return 1;
+ }
+ spin_unlock_irqrestore(&data->lock, flags);
+
+ /* PicoLCD USB packets contain 16-bit intervals in network order,
+ * with value negated for pulse. Intervals are in microseconds.
+ *
+ * Note: some userspace LIRC code for PicoLCD says negated values
+ * for space - is it a matter of IR chip? (pulse for my TSOP2236)
+ *
+ * In addition, the first interval seems to be around 15000 + base
+ * interval for non-first report of IR data - thus the quirk below
+ * to get RC_CODE to understand Sony and JVC remotes I have at hand
+ */
+ sz = size > 0 ? min((int)raw_data[0], size-1) : 0;
+ for (i = 0; i+1 < sz; i += 2) {
+ init_ir_raw_event(&rawir);
+ w = (raw_data[i] << 8) | (raw_data[i+1]);
+ rawir.pulse = !!(w & 0x8000);
+ rawir.duration = US_TO_NS(rawir.pulse ? (65536 - w) : w);
+ /* Quirk!! - see above */
+ if (i == 0 && rawir.duration > 15000000)
+ rawir.duration -= 15000000;
+ ir_raw_event_store(data->rc_dev, &rawir);
+ }
+ ir_raw_event_handle(data->rc_dev);
+
return 1;
}
+static int picolcd_cir_open(struct rc_dev *dev)
+{
+ struct picolcd_data *data = dev->priv;
+ unsigned long flags;
+
+ spin_lock_irqsave(&data->lock, flags);
+ data->status &= ~PICOLCD_CIR_SHUN;
+ spin_unlock_irqrestore(&data->lock, flags);
+ return 0;
+}
+
+static void picolcd_cir_close(struct rc_dev *dev)
+{
+ struct picolcd_data *data = dev->priv;
+ unsigned long flags;
+
+ spin_lock_irqsave(&data->lock, flags);
+ data->status |= PICOLCD_CIR_SHUN;
+ spin_unlock_irqrestore(&data->lock, flags);
+}
+
/* initialize CIR input device */
int picolcd_init_cir(struct picolcd_data *data, struct hid_report *report)
{
- /* support not implemented yet */
+ struct rc_dev *rdev;
+ int ret = 0;
+
+ rdev = rc_allocate_device();
+ if (!rdev)
+ return -ENOMEM;
+
+ rdev->priv = data;
+ rdev->driver_type = RC_DRIVER_IR_RAW;
+ rdev->allowed_protos = RC_TYPE_ALL;
+ rdev->open = picolcd_cir_open;
+ rdev->close = picolcd_cir_close;
+ rdev->input_name = data->hdev->name;
+ rdev->input_phys = data->hdev->phys;
+ rdev->input_id.bustype = data->hdev->bus;
+ rdev->input_id.vendor = data->hdev->vendor;
+ rdev->input_id.product = data->hdev->product;
+ rdev->input_id.version = data->hdev->version;
+ rdev->dev.parent = &data->hdev->dev;
+ rdev->driver_name = PICOLCD_NAME;
+ rdev->map_name = RC_MAP_RC6_MCE;
+ rdev->timeout = MS_TO_NS(100);
+ rdev->rx_resolution = US_TO_NS(1);
+
+ ret = rc_register_device(rdev);
+ if (ret)
+ goto err;
+ data->rc_dev = rdev;
return 0;
+
+err:
+ rc_free_device(rdev);
+ return ret;
}
void picolcd_exit_cir(struct picolcd_data *data)
{
+ struct rc_dev *rdev = data->rc_dev;
+
+ data->rc_dev = NULL;
+ rc_unregister_device(rdev);
}
diff --git a/drivers/hid/hid-picolcd_core.c b/drivers/hid/hid-picolcd_core.c
index 76ab173..580269b 100644
--- a/drivers/hid/hid-picolcd_core.c
+++ b/drivers/hid/hid-picolcd_core.c
@@ -356,8 +356,7 @@ static int picolcd_raw_event(struct hid_device *hdev,
if (data->input_keys)
ret = picolcd_raw_keypad(data, report, raw_data+1, size-1);
} else if (report->id == REPORT_IR_DATA) {
- if (data->input_cir)
- ret = picolcd_raw_cir(data, report, raw_data+1, size-1);
+ ret = picolcd_raw_cir(data, report, raw_data+1, size-1);
} else {
spin_lock_irqsave(&data->lock, flags);
/*
--
1.7.8.6
--
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