From ae08e324146c89f1059e9d3c3898d0260a988795 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bruno=20Pr=C3=A9mont?= Date: Sun, 19 Aug 2012 19:32:54 +0200 Subject: HID: picoLCD: Add support for CIR MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Implement support for picoLCD's CIR header using RC_CORE for decoding the IR event stream. Signed-off-by: Bruno Prémont Signed-off-by: Jiri Kosina --- drivers/hid/hid-picolcd_cir.c | 95 ++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 93 insertions(+), 2 deletions(-) (limited to 'drivers/hid/hid-picolcd_cir.c') diff --git a/drivers/hid/hid-picolcd_cir.c b/drivers/hid/hid-picolcd_cir.c index dc632c3cab36..14c5ce0e71bc 100644 --- a/drivers/hid/hid-picolcd_cir.c +++ b/drivers/hid/hid-picolcd_cir.c @@ -37,6 +37,7 @@ #include #include #include +#include #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); } -- cgit v1.2.1