Lines Matching +full:timer +full:- +full:width
1 // SPDX-License-Identifier: GPL-2.0-or-later
13 #include <media/drv-intf/cx25840.h>
14 #include <media/rc-core.h>
16 #include "cx25840-core.h"
117 return state ? state->ir_state : NULL; in to_ir_state()
135 d--; in count_to_clock_divider()
213 * FIFO register pulse width count computations
219 * of the pulse width counter as read from the FIFO. The two lsb's are in clock_divider_to_resolution()
232 * The 2 lsb's of the pulse width timer count are not readable, hence in pulse_width_count_to_ns()
251 * The 2 lsb's of the pulse width timer count are not accessible, hence
274 * The 2 lsb's of the pulse width timer count are not readable, hence in pulse_width_count_to_us()
285 * Pulse Clocks computations: Combined Pulse Width Count & Rx Clock Counts
287 * The total pulse clock count is an 18 bit pulse width timer count as the most
290 * width timer count's least significant bit.
313 count--; in pulse_clocks_to_clock_divider()
391 if (*carrier_range_high > DIV_ROUND_CLOSEST(c16, 16 - 3)) { in control_rx_s_carrier_window()
393 *carrier_range_high = DIV_ROUND_CLOSEST(c16, 16 - 4); in control_rx_s_carrier_window()
396 *carrier_range_high = DIV_ROUND_CLOSEST(c16, 16 - 3); in control_rx_s_carrier_window()
464 n--; in cduty_tx_s_duty_cycle()
491 cx25840_and_or4(state->c, CX25840_IR_IRQEN_REG, in irqenable_rx()
502 cx25840_and_or4(state->c, CX25840_IR_IRQEN_REG, ~IRQEN_TSE, mask); in irqenable_tx()
523 return -ENODEV; in cx25840_ir_irq_handler()
525 c = ir_state->c; in cx25840_ir_irq_handler()
529 return -ENODEV; in cx25840_ir_irq_handler()
539 rto = stats & STATS_RTO; /* Rx Pulse Width Timer Time Out */ in cx25840_ir_irq_handler()
544 rte = irqen & IRQEN_RTE; /* Rx Pulse Width Timer Time Out IRQ Enable */ in cx25840_ir_irq_handler()
599 k = kfifo_in_locked(&ir_state->rx_kfifo, in cx25840_ir_irq_handler()
601 &ir_state->rx_kfifo_lock); in cx25840_ir_irq_handler()
626 * the Rx Pulse Width Timer Time Out (STATS_RTO) in cx25840_ir_irq_handler()
637 spin_lock_irqsave(&ir_state->rx_kfifo_lock, flags); in cx25840_ir_irq_handler()
638 if (kfifo_len(&ir_state->rx_kfifo) >= CX25840_IR_RX_KFIFO_SIZE / 2) in cx25840_ir_irq_handler()
640 spin_unlock_irqrestore(&ir_state->rx_kfifo_lock, flags); in cx25840_ir_irq_handler()
659 return -ENODEV; in cx25840_ir_rx_read()
661 invert = (bool) atomic_read(&ir_state->rx_invert); in cx25840_ir_rx_read()
662 divider = (u16) atomic_read(&ir_state->rxclk_divider); in cx25840_ir_rx_read()
671 n = kfifo_out_locked(&ir_state->rx_kfifo, buf, n, in cx25840_ir_rx_read()
672 &ir_state->rx_kfifo_lock); in cx25840_ir_rx_read()
679 if ((p->hw_fifo_data & FIFO_RXTX_RTO) == FIFO_RXTX_RTO) { in cx25840_ir_rx_read()
684 u = (p->hw_fifo_data & FIFO_RXTX_LVL) ? 1 : 0; in cx25840_ir_rx_read()
691 (u16)(p->hw_fifo_data & FIFO_RXTX), divider) / 1000; in cx25840_ir_rx_read()
695 p->ir_core_data = (struct ir_raw_event) in cx25840_ir_rx_read()
712 return -ENODEV; in cx25840_ir_rx_g_parameters()
714 mutex_lock(&ir_state->rx_params_lock); in cx25840_ir_rx_g_parameters()
715 memcpy(p, &ir_state->rx_params, in cx25840_ir_rx_g_parameters()
717 mutex_unlock(&ir_state->rx_params_lock); in cx25840_ir_rx_g_parameters()
727 return -ENODEV; in cx25840_ir_rx_shutdown()
729 c = ir_state->c; in cx25840_ir_rx_shutdown()
730 mutex_lock(&ir_state->rx_params_lock); in cx25840_ir_rx_shutdown()
740 ir_state->rx_params.shutdown = true; in cx25840_ir_rx_shutdown()
742 mutex_unlock(&ir_state->rx_params_lock); in cx25840_ir_rx_shutdown()
755 return -ENODEV; in cx25840_ir_rx_s_parameters()
757 if (p->shutdown) in cx25840_ir_rx_s_parameters()
760 if (p->mode != V4L2_SUBDEV_IR_MODE_PULSE_WIDTH) in cx25840_ir_rx_s_parameters()
761 return -ENOSYS; in cx25840_ir_rx_s_parameters()
763 c = ir_state->c; in cx25840_ir_rx_s_parameters()
764 o = &ir_state->rx_params; in cx25840_ir_rx_s_parameters()
766 mutex_lock(&ir_state->rx_params_lock); in cx25840_ir_rx_s_parameters()
768 o->shutdown = p->shutdown; in cx25840_ir_rx_s_parameters()
770 p->mode = V4L2_SUBDEV_IR_MODE_PULSE_WIDTH; in cx25840_ir_rx_s_parameters()
771 o->mode = p->mode; in cx25840_ir_rx_s_parameters()
773 p->bytes_per_data_element = sizeof(union cx25840_ir_fifo_rec); in cx25840_ir_rx_s_parameters()
774 o->bytes_per_data_element = p->bytes_per_data_element; in cx25840_ir_rx_s_parameters()
780 control_rx_demodulation_enable(c, p->modulation); in cx25840_ir_rx_s_parameters()
781 o->modulation = p->modulation; in cx25840_ir_rx_s_parameters()
783 if (p->modulation) { in cx25840_ir_rx_s_parameters()
784 p->carrier_freq = rxclk_rx_s_carrier(c, p->carrier_freq, in cx25840_ir_rx_s_parameters()
787 o->carrier_freq = p->carrier_freq; in cx25840_ir_rx_s_parameters()
789 p->duty_cycle = 50; in cx25840_ir_rx_s_parameters()
790 o->duty_cycle = p->duty_cycle; in cx25840_ir_rx_s_parameters()
792 control_rx_s_carrier_window(c, p->carrier_freq, in cx25840_ir_rx_s_parameters()
793 &p->carrier_range_lower, in cx25840_ir_rx_s_parameters()
794 &p->carrier_range_upper); in cx25840_ir_rx_s_parameters()
795 o->carrier_range_lower = p->carrier_range_lower; in cx25840_ir_rx_s_parameters()
796 o->carrier_range_upper = p->carrier_range_upper; in cx25840_ir_rx_s_parameters()
798 p->max_pulse_width = in cx25840_ir_rx_s_parameters()
801 p->max_pulse_width = in cx25840_ir_rx_s_parameters()
802 rxclk_rx_s_max_pulse_width(c, p->max_pulse_width, in cx25840_ir_rx_s_parameters()
805 o->max_pulse_width = p->max_pulse_width; in cx25840_ir_rx_s_parameters()
806 atomic_set(&ir_state->rxclk_divider, rxclk_divider); in cx25840_ir_rx_s_parameters()
808 p->noise_filter_min_width = in cx25840_ir_rx_s_parameters()
809 filter_rx_s_min_width(c, p->noise_filter_min_width); in cx25840_ir_rx_s_parameters()
810 o->noise_filter_min_width = p->noise_filter_min_width; in cx25840_ir_rx_s_parameters()
812 p->resolution = clock_divider_to_resolution(rxclk_divider); in cx25840_ir_rx_s_parameters()
813 o->resolution = p->resolution; in cx25840_ir_rx_s_parameters()
815 /* FIXME - make this dependent on resolution for better performance */ in cx25840_ir_rx_s_parameters()
820 o->invert_level = p->invert_level; in cx25840_ir_rx_s_parameters()
821 atomic_set(&ir_state->rx_invert, p->invert_level); in cx25840_ir_rx_s_parameters()
823 o->interrupt_enable = p->interrupt_enable; in cx25840_ir_rx_s_parameters()
824 o->enable = p->enable; in cx25840_ir_rx_s_parameters()
825 if (p->enable) { in cx25840_ir_rx_s_parameters()
828 spin_lock_irqsave(&ir_state->rx_kfifo_lock, flags); in cx25840_ir_rx_s_parameters()
829 kfifo_reset(&ir_state->rx_kfifo); in cx25840_ir_rx_s_parameters()
830 spin_unlock_irqrestore(&ir_state->rx_kfifo_lock, flags); in cx25840_ir_rx_s_parameters()
831 if (p->interrupt_enable) in cx25840_ir_rx_s_parameters()
833 control_rx_enable(c, p->enable); in cx25840_ir_rx_s_parameters()
836 mutex_unlock(&ir_state->rx_params_lock); in cx25840_ir_rx_s_parameters()
847 return -ENODEV; in cx25840_ir_tx_write()
851 * FIXME - the code below is an incomplete and untested sketch of what in cx25840_ir_tx_write()
857 * tx_kfifo - don't let it happen and let the caller know not all his in cx25840_ir_tx_write()
866 n = CX25840_IR_TX_KFIFO_SIZE - kfifo_len(ir_state->tx_kfifo); in cx25840_ir_tx_write()
870 /* FIXME - turn on Tx Fifo service interrupt in cx25840_ir_tx_write()
879 ir_state->txclk_divider); in cx25840_ir_tx_write()
884 kfifo_put(ir_state->tx_kfifo, (u8 *) fifo_pulse, in cx25840_ir_tx_write()
902 return -ENODEV; in cx25840_ir_tx_g_parameters()
904 mutex_lock(&ir_state->tx_params_lock); in cx25840_ir_tx_g_parameters()
905 memcpy(p, &ir_state->tx_params, in cx25840_ir_tx_g_parameters()
907 mutex_unlock(&ir_state->tx_params_lock); in cx25840_ir_tx_g_parameters()
917 return -ENODEV; in cx25840_ir_tx_shutdown()
919 c = ir_state->c; in cx25840_ir_tx_shutdown()
920 mutex_lock(&ir_state->tx_params_lock); in cx25840_ir_tx_shutdown()
928 ir_state->tx_params.shutdown = true; in cx25840_ir_tx_shutdown()
930 mutex_unlock(&ir_state->tx_params_lock); in cx25840_ir_tx_shutdown()
943 return -ENODEV; in cx25840_ir_tx_s_parameters()
945 if (p->shutdown) in cx25840_ir_tx_s_parameters()
948 if (p->mode != V4L2_SUBDEV_IR_MODE_PULSE_WIDTH) in cx25840_ir_tx_s_parameters()
949 return -ENOSYS; in cx25840_ir_tx_s_parameters()
951 c = ir_state->c; in cx25840_ir_tx_s_parameters()
952 o = &ir_state->tx_params; in cx25840_ir_tx_s_parameters()
953 mutex_lock(&ir_state->tx_params_lock); in cx25840_ir_tx_s_parameters()
955 o->shutdown = p->shutdown; in cx25840_ir_tx_s_parameters()
957 p->mode = V4L2_SUBDEV_IR_MODE_PULSE_WIDTH; in cx25840_ir_tx_s_parameters()
958 o->mode = p->mode; in cx25840_ir_tx_s_parameters()
960 p->bytes_per_data_element = sizeof(union cx25840_ir_fifo_rec); in cx25840_ir_tx_s_parameters()
961 o->bytes_per_data_element = p->bytes_per_data_element; in cx25840_ir_tx_s_parameters()
967 control_tx_modulation_enable(c, p->modulation); in cx25840_ir_tx_s_parameters()
968 o->modulation = p->modulation; in cx25840_ir_tx_s_parameters()
970 if (p->modulation) { in cx25840_ir_tx_s_parameters()
971 p->carrier_freq = txclk_tx_s_carrier(c, p->carrier_freq, in cx25840_ir_tx_s_parameters()
973 o->carrier_freq = p->carrier_freq; in cx25840_ir_tx_s_parameters()
975 p->duty_cycle = cduty_tx_s_duty_cycle(c, p->duty_cycle); in cx25840_ir_tx_s_parameters()
976 o->duty_cycle = p->duty_cycle; in cx25840_ir_tx_s_parameters()
978 p->max_pulse_width = in cx25840_ir_tx_s_parameters()
981 p->max_pulse_width = in cx25840_ir_tx_s_parameters()
982 txclk_tx_s_max_pulse_width(c, p->max_pulse_width, in cx25840_ir_tx_s_parameters()
985 o->max_pulse_width = p->max_pulse_width; in cx25840_ir_tx_s_parameters()
986 atomic_set(&ir_state->txclk_divider, txclk_divider); in cx25840_ir_tx_s_parameters()
988 p->resolution = clock_divider_to_resolution(txclk_divider); in cx25840_ir_tx_s_parameters()
989 o->resolution = p->resolution; in cx25840_ir_tx_s_parameters()
991 /* FIXME - make this dependent on resolution for better performance */ in cx25840_ir_tx_s_parameters()
994 control_tx_polarity_invert(c, p->invert_carrier_sense); in cx25840_ir_tx_s_parameters()
995 o->invert_carrier_sense = p->invert_carrier_sense; in cx25840_ir_tx_s_parameters()
1003 o->invert_level = p->invert_level; in cx25840_ir_tx_s_parameters()
1005 o->interrupt_enable = p->interrupt_enable; in cx25840_ir_tx_s_parameters()
1006 o->enable = p->enable; in cx25840_ir_tx_s_parameters()
1007 if (p->enable) { in cx25840_ir_tx_s_parameters()
1009 if (p->interrupt_enable) in cx25840_ir_tx_s_parameters()
1011 control_tx_enable(c, p->enable); in cx25840_ir_tx_s_parameters()
1014 mutex_unlock(&ir_state->tx_params_lock); in cx25840_ir_tx_s_parameters()
1025 struct i2c_client *c = state->c; in cx25840_ir_log_status()
1069 v4l2_info(sd, "\tFIFO data on pulse timer overflow: %s\n", in cx25840_ir_log_status()
1100 v4l2_info(sd, "\tNext carrier edge window: 16 clocks -%1d/+%1d, %u to %u Hz\n", in cx25840_ir_log_status()
1103 clock_divider_to_freq(rxclk, 16 - i)); in cx25840_ir_log_status()
1105 v4l2_info(sd, "\tMax measurable pulse width: %u us, %llu ns\n", in cx25840_ir_log_status()
1111 v4l2_info(sd, "\tMin acceptable pulse width (LPF): %u us, %u ns\n", in cx25840_ir_log_status()
1114 v4l2_info(sd, "\tPulse width timer timed-out: %s\n", in cx25840_ir_log_status()
1116 v4l2_info(sd, "\tPulse width timer time-out intr: %s\n", in cx25840_ir_log_status()
1147 v4l2_info(sd, "\tMax pulse width: %u us, %llu ns\n", in cx25840_ir_log_status()
1181 .carrier_freq = 36000, /* 36 kHz - RC-5, and RC-6 carrier */
1183 /* RC-5: 666,667 ns = 1/36 kHz * 32 cycles * 1 mark * 0.75 */
1184 /* RC-6: 333,333 ns = 1/36 kHz * 16 cycles * 1 mark * 0.75 */
1200 .carrier_freq = 36000, /* 36 kHz - RC-5 carrier */
1201 .duty_cycle = 25, /* 25 % - RC-5 carrier */
1216 ir_state = devm_kzalloc(&state->c->dev, sizeof(*ir_state), GFP_KERNEL); in cx25840_ir_probe()
1218 return -ENOMEM; in cx25840_ir_probe()
1220 spin_lock_init(&ir_state->rx_kfifo_lock); in cx25840_ir_probe()
1221 if (kfifo_alloc(&ir_state->rx_kfifo, in cx25840_ir_probe()
1223 return -ENOMEM; in cx25840_ir_probe()
1225 ir_state->c = state->c; in cx25840_ir_probe()
1226 state->ir_state = ir_state; in cx25840_ir_probe()
1230 cx25840_write4(ir_state->c, CX25840_IR_IRQEN_REG, IRQEN_MSK); in cx25840_ir_probe()
1232 cx25840_write4(ir_state->c, CX25840_IR_IRQEN_REG, 0); in cx25840_ir_probe()
1234 mutex_init(&ir_state->rx_params_lock); in cx25840_ir_probe()
1238 mutex_init(&ir_state->tx_params_lock); in cx25840_ir_probe()
1251 return -ENODEV; in cx25840_ir_remove()
1256 kfifo_free(&ir_state->rx_kfifo); in cx25840_ir_remove()
1257 state->ir_state = NULL; in cx25840_ir_remove()