diff options
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/rc/nuvoton-cir.c | 85 | ||||
| -rw-r--r-- | drivers/media/rc/nuvoton-cir.h | 3 |
2 files changed, 88 insertions, 0 deletions
diff --git a/drivers/media/rc/nuvoton-cir.c b/drivers/media/rc/nuvoton-cir.c index c96da3aaf00b..c2ee5bdc6c7d 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) { @@ -1133,6 +1212,10 @@ 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"); @@ -1156,6 +1239,8 @@ 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 4a5650dffa29..c9c98ebb19ee 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 |
