diff options
| -rw-r--r-- | drivers/media/rc/nuvoton-cir.c | 127 | ||||
| -rw-r--r-- | drivers/media/rc/nuvoton-cir.h | 1 | ||||
| -rw-r--r-- | include/media/rc-core.h | 1 |
3 files changed, 129 insertions, 0 deletions
diff --git a/drivers/media/rc/nuvoton-cir.c b/drivers/media/rc/nuvoton-cir.c index 85af7a869167..baeb5971fd52 100644 --- a/drivers/media/rc/nuvoton-cir.c +++ b/drivers/media/rc/nuvoton-cir.c @@ -526,6 +526,130 @@ static int nvt_set_tx_carrier(struct rc_dev *dev, u32 carrier) return 0; } +static int nvt_write_wakeup_codes(struct rc_dev *dev, + const u8 *wakeup_sample_buf, int count) +{ + int i = 0; + u8 reg, reg_learn_mode; + unsigned long flags; + struct nvt_dev *nvt = dev->priv; + + nvt_dbg_wake("writing wakeup samples"); + + reg = nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRCON); + reg_learn_mode = reg & ~CIR_WAKE_IRCON_MODE0; + reg_learn_mode |= CIR_WAKE_IRCON_MODE1; + + /* Lock the learn area to prevent racing with wake-isr */ + spin_lock_irqsave(&nvt->nvt_lock, flags); + + /* Enable fifo writes */ + nvt_cir_wake_reg_write(nvt, reg_learn_mode, CIR_WAKE_IRCON); + + /* Clear cir wake rx fifo */ + nvt_clear_cir_wake_fifo(nvt); + + if (count > WAKE_FIFO_LEN) { + nvt_dbg_wake("HW FIFO too small for all wake samples"); + count = WAKE_FIFO_LEN; + } + + if (count) + pr_info("Wake samples (%d) =", count); + else + pr_info("Wake sample fifo cleared"); + + /* Write wake samples to fifo */ + for (i = 0; i < count; i++) { + pr_cont(" %02x", wakeup_sample_buf[i]); + nvt_cir_wake_reg_write(nvt, wakeup_sample_buf[i], + CIR_WAKE_WR_FIFO_DATA); + } + pr_cont("\n"); + + /* Switch cir to wakeup mode and disable fifo writing */ + nvt_cir_wake_reg_write(nvt, reg, CIR_WAKE_IRCON); + + /* Set number of bytes needed for wake */ + nvt_cir_wake_reg_write(nvt, count ? count : + CIR_WAKE_FIFO_CMP_BYTES, + CIR_WAKE_FIFO_CMP_DEEP); + + spin_unlock_irqrestore(&nvt->nvt_lock, flags); + + return 0; +} + +static int nvt_ir_raw_set_wakeup_filter(struct rc_dev *dev, + struct rc_scancode_filter *sc_filter) +{ + u8 *reg_buf; + u8 buf_val; + int i, ret, count; + unsigned int val; + struct ir_raw_event *raw; + bool complete; + + /* Require both mask and data to be set before actually committing */ + if (!sc_filter->mask || !sc_filter->data) + return 0; + + raw = kmalloc_array(WAKE_FIFO_LEN, sizeof(*raw), GFP_KERNEL); + if (!raw) + return -ENOMEM; + + ret = ir_raw_encode_scancode(dev->enabled_wakeup_protocols, sc_filter, + raw, WAKE_FIFO_LEN); + complete = (ret != -ENOBUFS); + if (!complete) + ret = WAKE_FIFO_LEN; + else if (ret < 0) + goto out_raw; + + reg_buf = kmalloc_array(WAKE_FIFO_LEN, sizeof(*reg_buf), GFP_KERNEL); + if (!reg_buf) { + ret = -ENOMEM; + goto out_raw; + } + + /* Inspect the ir samples */ + for (i = 0, count = 0; i < ret && count < WAKE_FIFO_LEN; ++i) { + val = NS_TO_US((raw[i]).duration) / SAMPLE_PERIOD; + + /* Split too large values into several smaller ones */ + while (val > 0 && count < WAKE_FIFO_LEN) { + + /* Skip last value for better comparison tolerance */ + if (complete && i == ret - 1 && val < BUF_LEN_MASK) + break; + + /* Clamp values to BUF_LEN_MASK at most */ + buf_val = (val > BUF_LEN_MASK) ? BUF_LEN_MASK : val; + + reg_buf[count] = buf_val; + val -= buf_val; + if ((raw[i]).pulse) + reg_buf[count] |= BUF_PULSE_BIT; + count++; + } + } + + ret = nvt_write_wakeup_codes(dev, reg_buf, count); + + kfree(reg_buf); +out_raw: + kfree(raw); + + return ret; +} + +/* Dummy implementation. nuvoton is agnostic to the protocol used */ +static int nvt_ir_raw_change_wakeup_protocol(struct rc_dev *dev, + u64 *rc_type) +{ + return 0; +} + /* * nvt_tx_ir * @@ -1043,11 +1167,14 @@ static int nvt_probe(struct pnp_dev *pdev, const struct pnp_device_id *dev_id) /* Set up the rc device */ rdev->priv = nvt; rdev->driver_type = RC_DRIVER_IR_RAW; + rdev->encode_wakeup = true; rdev->allowed_protocols = RC_BIT_ALL; rdev->open = nvt_open; rdev->close = nvt_close; rdev->tx_ir = nvt_tx_ir; rdev->s_tx_carrier = nvt_set_tx_carrier; + rdev->s_wakeup_filter = nvt_ir_raw_set_wakeup_filter; + rdev->change_wakeup_protocol = nvt_ir_raw_change_wakeup_protocol; rdev->input_name = "Nuvoton w836x7hg Infrared Remote Transceiver"; rdev->input_phys = "nuvoton/cir0"; rdev->input_id.bustype = BUS_HOST; diff --git a/drivers/media/rc/nuvoton-cir.h b/drivers/media/rc/nuvoton-cir.h index e1cf23c3875b..9d0e161c2a88 100644 --- a/drivers/media/rc/nuvoton-cir.h +++ b/drivers/media/rc/nuvoton-cir.h @@ -63,6 +63,7 @@ static int debug; */ #define TX_BUF_LEN 256 #define RX_BUF_LEN 32 +#define WAKE_FIFO_LEN 67 struct nvt_dev { struct pnp_dev *pdev; diff --git a/include/media/rc-core.h b/include/media/rc-core.h index 9ae433c7f14b..f1cb9daba489 100644 --- a/include/media/rc-core.h +++ b/include/media/rc-core.h @@ -246,6 +246,7 @@ static inline void init_ir_raw_event(struct ir_raw_event *ev) #define US_TO_NS(usec) ((usec) * 1000) #define MS_TO_US(msec) ((msec) * 1000) #define MS_TO_NS(msec) ((msec) * 1000 * 1000) +#define NS_TO_US(nsec) DIV_ROUND_UP(nsec, 1000L) void ir_raw_event_handle(struct rc_dev *dev); int ir_raw_event_store(struct rc_dev *dev, struct ir_raw_event *ev); |