new file mode 100644
@@ -0,0 +1,15 @@
+What: /sys/class/rc/rcN/wakeup_data
+Date: Mar 2016
+KernelVersion: 4.6
+Contact: Mauro Carvalho Chehab <m.chehab@samsung.com>
+Description:
+ Reading this file returns the stored CIR wakeup sequence.
+ It starts with a pulse, followed by a space, pulse etc.
+ All values are in microseconds.
+ The same format can be used to store a wakeup sequence
+ in the Nuvoton chip by writing to this file.
+
+ Note: Some systems reset the stored wakeup sequence to a
+ factory default on each boot. On such systems store the
+ wakeup sequence in a file and set it on boot using e.g.
+ a udev rule.
@@ -179,55 +179,74 @@ 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)
+static ssize_t wakeup_data_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
{
- 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;
+ int fifo_len, duration;
unsigned long flags;
+ ssize_t buf_len = 0;
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;
+ fifo_len = min(fifo_len, WAKEUP_MAX_SIZE);
/* go to first element to be read */
- while (nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY_IDX) != off)
+ while (nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY_IDX))
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);
+ for (i = 0; i < fifo_len; i++) {
+ duration = nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY);
+ duration = (duration & BUF_LEN_MASK) * SAMPLE_PERIOD;
+ buf_len += snprintf(buf + buf_len, PAGE_SIZE - buf_len,
+ "%d ", duration);
+ }
+ buf_len += snprintf(buf + buf_len, PAGE_SIZE - buf_len, "\n");
spin_unlock_irqrestore(&nvt->nvt_lock, flags);
- return len;
+ return buf_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)
+static ssize_t wakeup_data_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
{
- 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;
+ u8 tolerance, config, wake_buf[WAKEUP_MAX_SIZE];
+ char **argv;
+ int i, count;
+ unsigned int val;
+ ssize_t ret;
+
+ argv = argv_split(GFP_KERNEL, buf, &count);
+ if (!argv)
+ return -ENOMEM;
+ if (!count || count > WAKEUP_MAX_SIZE) {
+ ret = -EINVAL;
+ goto out;
+ }
- if (off > 0)
- return -EINVAL;
+ for (i = 0; i < count; i++) {
+ ret = kstrtouint(argv[i], 10, &val);
+ if (ret)
+ goto out;
+ val = DIV_ROUND_CLOSEST(val, SAMPLE_PERIOD);
+ if (!val || val > 0x7f) {
+ ret = -EINVAL;
+ goto out;
+ }
+ wake_buf[i] = val;
+ /* sequence must start with a pulse */
+ if (i % 2 == 0)
+ wake_buf[i] |= BUF_PULSE_BIT;
+ }
/* hardcode the tolerance to 10% */
tolerance = DIV_ROUND_UP(count, 10);
@@ -245,16 +264,18 @@ static ssize_t wakeup_data_write(struct file *fp, struct kobject *kobj,
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, wake_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;
+ ret = len;
+out:
+ argv_free(argv);
+ return ret;
}
-
-static BIN_ATTR_RW(wakeup_data, WAKEUP_MAX_SIZE);
+static DEVICE_ATTR_RW(wakeup_data);
/* dump current cir register contents */
static void cir_dump_regs(struct nvt_dev *nvt)
@@ -1212,7 +1233,7 @@ 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);
+ ret = device_create_file(&rdev->dev, &dev_attr_wakeup_data);
if (ret)
goto exit_unregister_device;
@@ -1239,7 +1260,7 @@ 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);
+ device_remove_file(&nvt->rdev->dev, &dev_attr_wakeup_data);
nvt_disable_cir(nvt);
Switch attribute wakeup_data from binary to a text attribute. This makes it easier to handle in userspace and allows to use the output of tools like mode2 almost as is to set a wakeup sequence. Changing to a text format and values in microseconds also makes the userspace interface independent of the setting of SAMPLE_PERIOD in the driver. In addition document the new sysfs attribute in Documentation/ABI/testing/sysfs-class-rc-nuvoton. Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com> --- Documentation/ABI/testing/sysfs-class-rc-nuvoton | 15 +++++ drivers/media/rc/nuvoton-cir.c | 85 +++++++++++++++--------- 2 files changed, 68 insertions(+), 32 deletions(-) create mode 100644 Documentation/ABI/testing/sysfs-class-rc-nuvoton