[media] media: rc: nuvoton: support reading / writing wakeup sequence via sysfs
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@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
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@ -39,6 +39,8 @@
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#include "nuvoton-cir.h"
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#include "nuvoton-cir.h"
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static void nvt_clear_cir_wake_fifo(struct nvt_dev *nvt);
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static const struct nvt_chip nvt_chips[] = {
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static const struct nvt_chip nvt_chips[] = {
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{ "w83667hg", NVT_W83667HG },
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{ "w83667hg", NVT_W83667HG },
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{ "NCT6775F", NVT_6775F },
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{ "NCT6775F", NVT_6775F },
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@ -177,6 +179,83 @@ static void nvt_set_ioaddr(struct nvt_dev *nvt, unsigned long *ioaddr)
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}
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}
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}
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}
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static ssize_t wakeup_data_read(struct file *fp, struct kobject *kobj,
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struct bin_attribute *bin_attr,
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char *buf, loff_t off, size_t count)
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{
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struct device *dev = kobj_to_dev(kobj);
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struct rc_dev *rc_dev = to_rc_dev(dev);
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struct nvt_dev *nvt = rc_dev->priv;
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int fifo_len, len;
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unsigned long flags;
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int i;
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spin_lock_irqsave(&nvt->nvt_lock, flags);
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fifo_len = nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_COUNT);
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len = min(fifo_len, WAKEUP_MAX_SIZE);
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if (off >= len) {
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spin_unlock_irqrestore(&nvt->nvt_lock, flags);
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return 0;
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}
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if (len > count)
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len = count;
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/* go to first element to be read */
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while (nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY_IDX) != off)
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nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY);
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for (i = 0; i < len; i++)
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buf[i] = nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY);
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spin_unlock_irqrestore(&nvt->nvt_lock, flags);
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return len;
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}
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static ssize_t wakeup_data_write(struct file *fp, struct kobject *kobj,
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struct bin_attribute *bin_attr,
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char *buf, loff_t off, size_t count)
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{
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struct device *dev = kobj_to_dev(kobj);
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struct rc_dev *rc_dev = to_rc_dev(dev);
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struct nvt_dev *nvt = rc_dev->priv;
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unsigned long flags;
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u8 tolerance, config;
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int i;
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if (off > 0)
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return -EINVAL;
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/* hardcode the tolerance to 10% */
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tolerance = DIV_ROUND_UP(count, 10);
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spin_lock_irqsave(&nvt->nvt_lock, flags);
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nvt_clear_cir_wake_fifo(nvt);
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nvt_cir_wake_reg_write(nvt, count, CIR_WAKE_FIFO_CMP_DEEP);
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nvt_cir_wake_reg_write(nvt, tolerance, CIR_WAKE_FIFO_CMP_TOL);
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config = nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRCON);
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/* enable writes to wake fifo */
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nvt_cir_wake_reg_write(nvt, config | CIR_WAKE_IRCON_MODE1,
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CIR_WAKE_IRCON);
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for (i = 0; i < count; i++)
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nvt_cir_wake_reg_write(nvt, buf[i], CIR_WAKE_WR_FIFO_DATA);
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nvt_cir_wake_reg_write(nvt, config, CIR_WAKE_IRCON);
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spin_unlock_irqrestore(&nvt->nvt_lock, flags);
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return count;
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}
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static BIN_ATTR_RW(wakeup_data, WAKEUP_MAX_SIZE);
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/* dump current cir register contents */
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/* dump current cir register contents */
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static void cir_dump_regs(struct nvt_dev *nvt)
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static void cir_dump_regs(struct nvt_dev *nvt)
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{
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{
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@ -1133,6 +1212,10 @@ static int nvt_probe(struct pnp_dev *pdev, const struct pnp_device_id *dev_id)
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NVT_DRIVER_NAME "-wake", (void *)nvt))
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NVT_DRIVER_NAME "-wake", (void *)nvt))
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goto exit_unregister_device;
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goto exit_unregister_device;
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ret = device_create_bin_file(&rdev->dev, &bin_attr_wakeup_data);
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if (ret)
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goto exit_unregister_device;
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device_init_wakeup(&pdev->dev, true);
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device_init_wakeup(&pdev->dev, true);
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dev_notice(&pdev->dev, "driver has been successfully loaded\n");
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dev_notice(&pdev->dev, "driver has been successfully loaded\n");
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@ -1156,6 +1239,8 @@ static void nvt_remove(struct pnp_dev *pdev)
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{
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{
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struct nvt_dev *nvt = pnp_get_drvdata(pdev);
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struct nvt_dev *nvt = pnp_get_drvdata(pdev);
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device_remove_bin_file(&nvt->rdev->dev, &bin_attr_wakeup_data);
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nvt_disable_cir(nvt);
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nvt_disable_cir(nvt);
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/* enable CIR Wake (for IR power-on) */
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/* enable CIR Wake (for IR power-on) */
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@ -417,3 +417,6 @@ struct nvt_dev {
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/* as VISTA MCE definition, valid carrier value */
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/* as VISTA MCE definition, valid carrier value */
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#define MAX_CARRIER 60000
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#define MAX_CARRIER 60000
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#define MIN_CARRIER 30000
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#define MIN_CARRIER 30000
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/* max wakeup sequence length */
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#define WAKEUP_MAX_SIZE 65
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