This patch adds a binary attribute /sys/class/rc/rc?/wakeup_data which
allows to read / write the wakeup sequence.
In combination with the core extension for exposing the most recent raw
packet this allows to easily define and set a wakeup sequence.
At least on my Zotac CI321 the BIOS resets the wakeup sequence at each boot
to a factory default. Therefore I use a udev rule
SUBSYSTEM=="rc", DRIVERS=="nuvoton-cir", ACTION=="add", RUN+="<script>"
with the script basically doing
cat <stored wakeup sequence> >/sys${DEVPATH}/wakeup_data
Signed-off-by: Heiner Kallweit <hkallweit1@xxxxxxxxx>
---
drivers/media/rc/nuvoton-cir.c | 85 ++++++++++++++++++++++++++++++++++++++++++
drivers/media/rc/nuvoton-cir.h | 3 ++
2 files changed, 88 insertions(+)
diff --git a/drivers/media/rc/nuvoton-cir.c b/drivers/media/rc/nuvoton-cir.c
index 4b97a6f..75f428c 100644
--- a/drivers/media/rc/nuvoton-cir.c
+++ b/drivers/media/rc/nuvoton-cir.c
@@ -39,6 +39,8 @@
#include "nuvoton-cir.h"
+static void nvt_clear_cir_wake_fifo(struct nvt_dev *nvt);
+
static const struct nvt_chip nvt_chips[] = {
{ "w83667hg", NVT_W83667HG },
{ "NCT6775F", NVT_6775F },
@@ -177,6 +179,83 @@ static void nvt_set_ioaddr(struct nvt_dev *nvt, unsigned long *ioaddr)
}
}
+static ssize_t wakeup_data_read(struct file *fp, struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
+{
+ struct device *dev = kobj_to_dev(kobj);
+ struct rc_dev *rc_dev = to_rc_dev(dev);
+ struct nvt_dev *nvt = rc_dev->priv;
+ int fifo_len, len;
+ unsigned long flags;
+ int i;
+
+ spin_lock_irqsave(&nvt->nvt_lock, flags);
+
+ fifo_len = nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_COUNT);
+ len = min(fifo_len, WAKEUP_MAX_SIZE);
+
+ if (off >= len) {
+ spin_unlock_irqrestore(&nvt->nvt_lock, flags);
+ return 0;
+ }
+
+ if (len > count)
+ len = count;
+
+ /* go to first element to be read */
+ while(nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY_IDX) != off)
+ nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY);
+
+ for (i = 0; i < len; i++)
+ buf[i] = nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY);
+
+ spin_unlock_irqrestore(&nvt->nvt_lock, flags);
+
+ return len;
+}
+
+static ssize_t wakeup_data_write(struct file *fp, struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
+{
+ struct device *dev = kobj_to_dev(kobj);
+ struct rc_dev *rc_dev = to_rc_dev(dev);
+ struct nvt_dev *nvt = rc_dev->priv;
+ unsigned long flags;
+ u8 tolerance, config;
+ int i;
+
+ if (off > 0)
+ return -EINVAL;
+
+ /* hardcode the tolerance to 10% */
+ tolerance = DIV_ROUND_UP(count, 10);
+
+ spin_lock_irqsave(&nvt->nvt_lock, flags);
+
+ nvt_clear_cir_wake_fifo(nvt);
+ nvt_cir_wake_reg_write(nvt, count, CIR_WAKE_FIFO_CMP_DEEP);
+ nvt_cir_wake_reg_write(nvt, tolerance, CIR_WAKE_FIFO_CMP_TOL);
+
+ config = nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRCON);
+
+ /* enable writes to wake fifo */
+ nvt_cir_wake_reg_write(nvt, config | CIR_WAKE_IRCON_MODE1,
+ CIR_WAKE_IRCON);
+
+ for (i = 0; i < count; i++)
+ nvt_cir_wake_reg_write(nvt, buf[i], CIR_WAKE_WR_FIFO_DATA);
+
+ nvt_cir_wake_reg_write(nvt, config, CIR_WAKE_IRCON);
+
+ spin_unlock_irqrestore(&nvt->nvt_lock, flags);
+
+ return count;
+}
+
+static BIN_ATTR_RW(wakeup_data, WAKEUP_MAX_SIZE);
+
/* dump current cir register contents */
static void cir_dump_regs(struct nvt_dev *nvt)
{
@@ -1135,6 +1214,10 @@ static int nvt_probe(struct pnp_dev *pdev, const struct pnp_device_id *dev_id)
NVT_DRIVER_NAME "-wake", (void *)nvt))
goto exit_unregister_device;
+ ret = device_create_bin_file(&rdev->dev, &bin_attr_wakeup_data);
+ if (ret)
+ goto exit_unregister_device;
+
device_init_wakeup(&pdev->dev, true);
dev_notice(&pdev->dev, "driver has been successfully loaded\n");
@@ -1158,6 +1241,8 @@ static void nvt_remove(struct pnp_dev *pdev)
{
struct nvt_dev *nvt = pnp_get_drvdata(pdev);
+ device_remove_bin_file(&nvt->rdev->dev, &bin_attr_wakeup_data);
+
nvt_disable_cir(nvt);
/* enable CIR Wake (for IR power-on) */
diff --git a/drivers/media/rc/nuvoton-cir.h b/drivers/media/rc/nuvoton-cir.h
index 4a5650d..c9c98eb 100644
--- a/drivers/media/rc/nuvoton-cir.h
+++ b/drivers/media/rc/nuvoton-cir.h
@@ -417,3 +417,6 @@ struct nvt_dev {
/* as VISTA MCE definition, valid carrier value */
#define MAX_CARRIER 60000
#define MIN_CARRIER 30000
+
+/* max wakeup sequence length */
+#define WAKEUP_MAX_SIZE 65
--
2.7.1
--
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