static int cx23888_ir_rx_shutdown(struct v4l2_subdev *sd)
{
struct cx23888_ir_state *state = to_state(sd);
struct cx23885_dev *dev = state->dev;
mutex_lock(&state->rx_params_lock);
/* Disable or slow down all IR Rx circuits and counters */
irqenable_rx(dev, 0);
control_rx_enable(dev, false);
control_rx_demodulation_enable(dev, false);
control_rx_s_edge_detection(dev, CNTRL_EDG_NONE);
filter_rx_s_min_width(dev, 0);
cx23888_ir_write4(dev, CX23888_IR_RXCLK_REG, RXCLK_RCD);
state->rx_params.shutdown = true;
mutex_unlock(&state->rx_params_lock);
return 0;
}
static int cx25840_ir_rx_shutdown(struct v4l2_subdev *sd)
{
struct cx25840_ir_state *ir_state = to_ir_state(sd);
struct i2c_client *c;
if (ir_state == NULL)
return -ENODEV;
c = ir_state->c;
mutex_lock(&ir_state->rx_params_lock);
/* Disable or slow down all IR Rx circuits and counters */
irqenable_rx(sd, 0);
control_rx_enable(c, false);
control_rx_demodulation_enable(c, false);
control_rx_s_edge_detection(c, CNTRL_EDG_NONE);
filter_rx_s_min_width(c, 0);
cx25840_write4(c, CX25840_IR_RXCLK_REG, RXCLK_RCD);
ir_state->rx_params.shutdown = true;
mutex_unlock(&ir_state->rx_params_lock);
return 0;
}
static int cx23888_ir_rx_s_parameters(struct v4l2_subdev *sd,
struct v4l2_subdev_ir_parameters *p)
{
struct cx23888_ir_state *state = to_state(sd);
struct cx23885_dev *dev = state->dev;
struct v4l2_subdev_ir_parameters *o = &state->rx_params;
u16 rxclk_divider;
if (p->shutdown)
return cx23888_ir_rx_shutdown(sd);
if (p->mode != V4L2_SUBDEV_IR_MODE_PULSE_WIDTH)
return -ENOSYS;
mutex_lock(&state->rx_params_lock);
o->shutdown = p->shutdown;
o->mode = p->mode = V4L2_SUBDEV_IR_MODE_PULSE_WIDTH;
o->bytes_per_data_element = p->bytes_per_data_element
= sizeof(union cx23888_ir_fifo_rec);
/* Before we tweak the hardware, we have to disable the receiver */
irqenable_rx(dev, 0);
control_rx_enable(dev, false);
control_rx_demodulation_enable(dev, p->modulation);
o->modulation = p->modulation;
if (p->modulation) {
p->carrier_freq = rxclk_rx_s_carrier(dev, p->carrier_freq,
&rxclk_divider);
o->carrier_freq = p->carrier_freq;
o->duty_cycle = p->duty_cycle = 50;
control_rx_s_carrier_window(dev, p->carrier_freq,
&p->carrier_range_lower,
&p->carrier_range_upper);
o->carrier_range_lower = p->carrier_range_lower;
o->carrier_range_upper = p->carrier_range_upper;
p->max_pulse_width =
(u32) pulse_width_count_to_ns(FIFO_RXTX, rxclk_divider);
} else {
p->max_pulse_width =
rxclk_rx_s_max_pulse_width(dev, p->max_pulse_width,
&rxclk_divider);
}
o->max_pulse_width = p->max_pulse_width;
atomic_set(&state->rxclk_divider, rxclk_divider);
p->noise_filter_min_width =
filter_rx_s_min_width(dev, p->noise_filter_min_width);
o->noise_filter_min_width = p->noise_filter_min_width;
p->resolution = clock_divider_to_resolution(rxclk_divider);
o->resolution = p->resolution;
/* FIXME - make this dependent on resolution for better performance */
control_rx_irq_watermark(dev, RX_FIFO_HALF_FULL);
control_rx_s_edge_detection(dev, CNTRL_EDG_BOTH);
o->invert_level = p->invert_level;
atomic_set(&state->rx_invert, p->invert_level);
o->interrupt_enable = p->interrupt_enable;
o->enable = p->enable;
if (p->enable) {
unsigned long flags;
spin_lock_irqsave(&state->rx_kfifo_lock, flags);
kfifo_reset(&state->rx_kfifo);
/* reset tx_fifo too if there is one... */
spin_unlock_irqrestore(&state->rx_kfifo_lock, flags);
if (p->interrupt_enable)
irqenable_rx(dev, IRQEN_RSE | IRQEN_RTE | IRQEN_ROE);
control_rx_enable(dev, p->enable);
}
mutex_unlock(&state->rx_params_lock);
return 0;
}
static int cx25840_ir_rx_s_parameters(struct v4l2_subdev *sd,
struct v4l2_subdev_ir_parameters *p)
{
struct cx25840_ir_state *ir_state = to_ir_state(sd);
struct i2c_client *c;
struct v4l2_subdev_ir_parameters *o;
u16 rxclk_divider;
if (ir_state == NULL)
return -ENODEV;
if (p->shutdown)
return cx25840_ir_rx_shutdown(sd);
if (p->mode != V4L2_SUBDEV_IR_MODE_PULSE_WIDTH)
return -ENOSYS;
c = ir_state->c;
o = &ir_state->rx_params;
mutex_lock(&ir_state->rx_params_lock);
o->shutdown = p->shutdown;
p->mode = V4L2_SUBDEV_IR_MODE_PULSE_WIDTH;
o->mode = p->mode;
p->bytes_per_data_element = sizeof(union cx25840_ir_fifo_rec);
o->bytes_per_data_element = p->bytes_per_data_element;
/* Before we tweak the hardware, we have to disable the receiver */
irqenable_rx(sd, 0);
control_rx_enable(c, false);
control_rx_demodulation_enable(c, p->modulation);
o->modulation = p->modulation;
if (p->modulation) {
p->carrier_freq = rxclk_rx_s_carrier(c, p->carrier_freq,
&rxclk_divider);
o->carrier_freq = p->carrier_freq;
p->duty_cycle = 50;
o->duty_cycle = p->duty_cycle;
control_rx_s_carrier_window(c, p->carrier_freq,
&p->carrier_range_lower,
&p->carrier_range_upper);
o->carrier_range_lower = p->carrier_range_lower;
o->carrier_range_upper = p->carrier_range_upper;
p->max_pulse_width =
(u32) pulse_width_count_to_ns(FIFO_RXTX, rxclk_divider);
} else {
p->max_pulse_width =
rxclk_rx_s_max_pulse_width(c, p->max_pulse_width,
&rxclk_divider);
}
o->max_pulse_width = p->max_pulse_width;
atomic_set(&ir_state->rxclk_divider, rxclk_divider);
p->noise_filter_min_width =
filter_rx_s_min_width(c, p->noise_filter_min_width);
o->noise_filter_min_width = p->noise_filter_min_width;
p->resolution = clock_divider_to_resolution(rxclk_divider);
o->resolution = p->resolution;
/* FIXME - make this dependent on resolution for better performance */
control_rx_irq_watermark(c, RX_FIFO_HALF_FULL);
control_rx_s_edge_detection(c, CNTRL_EDG_BOTH);
o->invert_level = p->invert_level;
atomic_set(&ir_state->rx_invert, p->invert_level);
o->interrupt_enable = p->interrupt_enable;
o->enable = p->enable;
if (p->enable) {
kfifo_reset(ir_state->rx_kfifo);
if (p->interrupt_enable)
irqenable_rx(sd, IRQEN_RSE | IRQEN_RTE | IRQEN_ROE);
control_rx_enable(c, p->enable);
}
mutex_unlock(&ir_state->rx_params_lock);
return 0;
}