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409 lines
11 KiB
409 lines
11 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Driver for the Conexant CX23885/7/8 PCIe bridge |
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* |
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* Infrared remote control input device |
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* |
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* Most of this file is |
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* |
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* Copyright (C) 2009 Andy Walls <[email protected]> |
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* |
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* However, the cx23885_input_{init,fini} functions contained herein are |
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* derived from Linux kernel files linux/media/video/.../...-input.c marked as: |
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* |
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* Copyright (C) 2008 <srinivasa.deevi at conexant dot com> |
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* Copyright (C) 2005 Ludovico Cavedon <[email protected]> |
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* Markus Rechberger <[email protected]> |
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* Mauro Carvalho Chehab <[email protected]> |
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* Sascha Sommer <[email protected]> |
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* Copyright (C) 2004, 2005 Chris Pascoe |
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* Copyright (C) 2003, 2004 Gerd Knorr |
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* Copyright (C) 2003 Pavel Machek |
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*/ |
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#include "cx23885.h" |
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#include "cx23885-input.h" |
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#include <linux/slab.h> |
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#include <media/rc-core.h> |
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#include <media/v4l2-subdev.h> |
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#define MODULE_NAME "cx23885" |
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static void cx23885_input_process_measurements(struct cx23885_dev *dev, |
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bool overrun) |
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{ |
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struct cx23885_kernel_ir *kernel_ir = dev->kernel_ir; |
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ssize_t num; |
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int count, i; |
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bool handle = false; |
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struct ir_raw_event ir_core_event[64]; |
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do { |
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num = 0; |
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v4l2_subdev_call(dev->sd_ir, ir, rx_read, (u8 *) ir_core_event, |
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sizeof(ir_core_event), &num); |
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count = num / sizeof(struct ir_raw_event); |
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for (i = 0; i < count; i++) { |
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ir_raw_event_store(kernel_ir->rc, |
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&ir_core_event[i]); |
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handle = true; |
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} |
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} while (num != 0); |
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if (overrun) |
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ir_raw_event_reset(kernel_ir->rc); |
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else if (handle) |
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ir_raw_event_handle(kernel_ir->rc); |
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} |
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void cx23885_input_rx_work_handler(struct cx23885_dev *dev, u32 events) |
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{ |
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struct v4l2_subdev_ir_parameters params; |
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int overrun, data_available; |
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if (dev->sd_ir == NULL || events == 0) |
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return; |
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switch (dev->board) { |
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case CX23885_BOARD_HAUPPAUGE_HVR1270: |
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case CX23885_BOARD_HAUPPAUGE_HVR1850: |
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case CX23885_BOARD_HAUPPAUGE_HVR1290: |
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case CX23885_BOARD_TERRATEC_CINERGY_T_PCIE_DUAL: |
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case CX23885_BOARD_TEVII_S470: |
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case CX23885_BOARD_HAUPPAUGE_HVR1250: |
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case CX23885_BOARD_MYGICA_X8507: |
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case CX23885_BOARD_TBS_6980: |
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case CX23885_BOARD_TBS_6981: |
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case CX23885_BOARD_DVBSKY_T9580: |
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case CX23885_BOARD_DVBSKY_T980C: |
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case CX23885_BOARD_DVBSKY_S950C: |
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case CX23885_BOARD_TT_CT2_4500_CI: |
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case CX23885_BOARD_DVBSKY_S950: |
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case CX23885_BOARD_DVBSKY_S952: |
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case CX23885_BOARD_DVBSKY_T982: |
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case CX23885_BOARD_HAUPPAUGE_HVR1265_K4: |
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/* |
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* The only boards we handle right now. However other boards |
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* using the CX2388x integrated IR controller should be similar |
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*/ |
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break; |
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default: |
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return; |
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} |
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overrun = events & (V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN | |
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V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN); |
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data_available = events & (V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED | |
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V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ); |
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if (overrun) { |
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/* If there was a FIFO overrun, stop the device */ |
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v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, ¶ms); |
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params.enable = false; |
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/* Mitigate race with cx23885_input_ir_stop() */ |
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params.shutdown = atomic_read(&dev->ir_input_stopping); |
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v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, ¶ms); |
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} |
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if (data_available) |
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cx23885_input_process_measurements(dev, overrun); |
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if (overrun) { |
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/* If there was a FIFO overrun, clear & restart the device */ |
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params.enable = true; |
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/* Mitigate race with cx23885_input_ir_stop() */ |
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params.shutdown = atomic_read(&dev->ir_input_stopping); |
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v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, ¶ms); |
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} |
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} |
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static int cx23885_input_ir_start(struct cx23885_dev *dev) |
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{ |
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struct v4l2_subdev_ir_parameters params; |
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if (dev->sd_ir == NULL) |
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return -ENODEV; |
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atomic_set(&dev->ir_input_stopping, 0); |
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v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, ¶ms); |
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switch (dev->board) { |
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case CX23885_BOARD_HAUPPAUGE_HVR1270: |
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case CX23885_BOARD_HAUPPAUGE_HVR1850: |
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case CX23885_BOARD_HAUPPAUGE_HVR1290: |
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case CX23885_BOARD_HAUPPAUGE_HVR1250: |
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case CX23885_BOARD_MYGICA_X8507: |
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case CX23885_BOARD_DVBSKY_T9580: |
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case CX23885_BOARD_DVBSKY_T980C: |
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case CX23885_BOARD_DVBSKY_S950C: |
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case CX23885_BOARD_TT_CT2_4500_CI: |
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case CX23885_BOARD_DVBSKY_S950: |
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case CX23885_BOARD_DVBSKY_S952: |
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case CX23885_BOARD_DVBSKY_T982: |
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case CX23885_BOARD_HAUPPAUGE_HVR1265_K4: |
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/* |
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* The IR controller on this board only returns pulse widths. |
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* Any other mode setting will fail to set up the device. |
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*/ |
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params.mode = V4L2_SUBDEV_IR_MODE_PULSE_WIDTH; |
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params.enable = true; |
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params.interrupt_enable = true; |
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params.shutdown = false; |
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/* Setup for baseband compatible with both RC-5 and RC-6A */ |
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params.modulation = false; |
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/* RC-5: 2,222,222 ns = 1/36 kHz * 32 cycles * 2 marks * 1.25*/ |
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/* RC-6A: 3,333,333 ns = 1/36 kHz * 16 cycles * 6 marks * 1.25*/ |
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params.max_pulse_width = 3333333; /* ns */ |
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/* RC-5: 666,667 ns = 1/36 kHz * 32 cycles * 1 mark * 0.75 */ |
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/* RC-6A: 333,333 ns = 1/36 kHz * 16 cycles * 1 mark * 0.75 */ |
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params.noise_filter_min_width = 333333; /* ns */ |
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/* |
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* This board has inverted receive sense: |
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* mark is received as low logic level; |
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* falling edges are detected as rising edges; etc. |
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*/ |
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params.invert_level = true; |
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break; |
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case CX23885_BOARD_TERRATEC_CINERGY_T_PCIE_DUAL: |
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case CX23885_BOARD_TEVII_S470: |
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case CX23885_BOARD_TBS_6980: |
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case CX23885_BOARD_TBS_6981: |
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/* |
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* The IR controller on this board only returns pulse widths. |
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* Any other mode setting will fail to set up the device. |
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*/ |
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params.mode = V4L2_SUBDEV_IR_MODE_PULSE_WIDTH; |
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params.enable = true; |
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params.interrupt_enable = true; |
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params.shutdown = false; |
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/* Setup for a standard NEC protocol */ |
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params.carrier_freq = 37917; /* Hz, 455 kHz/12 for NEC */ |
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params.carrier_range_lower = 33000; /* Hz */ |
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params.carrier_range_upper = 43000; /* Hz */ |
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params.duty_cycle = 33; /* percent, 33 percent for NEC */ |
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/* |
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* NEC max pulse width: (64/3)/(455 kHz/12) * 16 nec_units |
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* (64/3)/(455 kHz/12) * 16 nec_units * 1.375 = 12378022 ns |
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*/ |
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params.max_pulse_width = 12378022; /* ns */ |
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/* |
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* NEC noise filter min width: (64/3)/(455 kHz/12) * 1 nec_unit |
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* (64/3)/(455 kHz/12) * 1 nec_units * 0.625 = 351648 ns |
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*/ |
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params.noise_filter_min_width = 351648; /* ns */ |
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params.modulation = false; |
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params.invert_level = true; |
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break; |
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} |
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v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, ¶ms); |
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return 0; |
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} |
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static int cx23885_input_ir_open(struct rc_dev *rc) |
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{ |
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struct cx23885_kernel_ir *kernel_ir = rc->priv; |
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if (kernel_ir->cx == NULL) |
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return -ENODEV; |
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return cx23885_input_ir_start(kernel_ir->cx); |
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} |
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static void cx23885_input_ir_stop(struct cx23885_dev *dev) |
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{ |
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struct v4l2_subdev_ir_parameters params; |
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if (dev->sd_ir == NULL) |
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return; |
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/* |
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* Stop the sd_ir subdevice from generating notifications and |
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* scheduling work. |
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* It is shutdown this way in order to mitigate a race with |
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* cx23885_input_rx_work_handler() in the overrun case, which could |
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* re-enable the subdevice. |
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*/ |
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atomic_set(&dev->ir_input_stopping, 1); |
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v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, ¶ms); |
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while (params.shutdown == false) { |
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params.enable = false; |
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params.interrupt_enable = false; |
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params.shutdown = true; |
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v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, ¶ms); |
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v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, ¶ms); |
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} |
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flush_work(&dev->cx25840_work); |
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flush_work(&dev->ir_rx_work); |
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flush_work(&dev->ir_tx_work); |
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} |
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static void cx23885_input_ir_close(struct rc_dev *rc) |
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{ |
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struct cx23885_kernel_ir *kernel_ir = rc->priv; |
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if (kernel_ir->cx != NULL) |
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cx23885_input_ir_stop(kernel_ir->cx); |
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} |
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int cx23885_input_init(struct cx23885_dev *dev) |
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{ |
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struct cx23885_kernel_ir *kernel_ir; |
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struct rc_dev *rc; |
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char *rc_map; |
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u64 allowed_protos; |
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int ret; |
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/* |
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* If the IR device (hardware registers, chip, GPIO lines, etc.) isn't |
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* encapsulated in a v4l2_subdev, then I'm not going to deal with it. |
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*/ |
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if (dev->sd_ir == NULL) |
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return -ENODEV; |
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switch (dev->board) { |
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case CX23885_BOARD_HAUPPAUGE_HVR1270: |
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case CX23885_BOARD_HAUPPAUGE_HVR1850: |
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case CX23885_BOARD_HAUPPAUGE_HVR1290: |
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case CX23885_BOARD_HAUPPAUGE_HVR1250: |
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case CX23885_BOARD_HAUPPAUGE_HVR1265_K4: |
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/* Integrated CX2388[58] IR controller */ |
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allowed_protos = RC_PROTO_BIT_ALL_IR_DECODER; |
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/* The grey Hauppauge RC-5 remote */ |
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rc_map = RC_MAP_HAUPPAUGE; |
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break; |
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case CX23885_BOARD_TERRATEC_CINERGY_T_PCIE_DUAL: |
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/* Integrated CX23885 IR controller */ |
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allowed_protos = RC_PROTO_BIT_ALL_IR_DECODER; |
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/* The grey Terratec remote with orange buttons */ |
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rc_map = RC_MAP_NEC_TERRATEC_CINERGY_XS; |
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break; |
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case CX23885_BOARD_TEVII_S470: |
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/* Integrated CX23885 IR controller */ |
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allowed_protos = RC_PROTO_BIT_ALL_IR_DECODER; |
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/* A guess at the remote */ |
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rc_map = RC_MAP_TEVII_NEC; |
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break; |
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case CX23885_BOARD_MYGICA_X8507: |
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/* Integrated CX23885 IR controller */ |
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allowed_protos = RC_PROTO_BIT_ALL_IR_DECODER; |
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/* A guess at the remote */ |
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rc_map = RC_MAP_TOTAL_MEDIA_IN_HAND_02; |
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break; |
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case CX23885_BOARD_TBS_6980: |
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case CX23885_BOARD_TBS_6981: |
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/* Integrated CX23885 IR controller */ |
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allowed_protos = RC_PROTO_BIT_ALL_IR_DECODER; |
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/* A guess at the remote */ |
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rc_map = RC_MAP_TBS_NEC; |
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break; |
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case CX23885_BOARD_DVBSKY_T9580: |
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case CX23885_BOARD_DVBSKY_T980C: |
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case CX23885_BOARD_DVBSKY_S950C: |
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case CX23885_BOARD_DVBSKY_S950: |
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case CX23885_BOARD_DVBSKY_S952: |
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case CX23885_BOARD_DVBSKY_T982: |
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/* Integrated CX23885 IR controller */ |
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allowed_protos = RC_PROTO_BIT_ALL_IR_DECODER; |
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rc_map = RC_MAP_DVBSKY; |
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break; |
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case CX23885_BOARD_TT_CT2_4500_CI: |
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/* Integrated CX23885 IR controller */ |
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allowed_protos = RC_PROTO_BIT_ALL_IR_DECODER; |
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rc_map = RC_MAP_TT_1500; |
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break; |
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default: |
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return -ENODEV; |
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} |
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/* cx23885 board instance kernel IR state */ |
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kernel_ir = kzalloc(sizeof(struct cx23885_kernel_ir), GFP_KERNEL); |
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if (kernel_ir == NULL) |
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return -ENOMEM; |
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kernel_ir->cx = dev; |
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kernel_ir->name = kasprintf(GFP_KERNEL, "cx23885 IR (%s)", |
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cx23885_boards[dev->board].name); |
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if (!kernel_ir->name) { |
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ret = -ENOMEM; |
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goto err_out_free; |
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} |
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kernel_ir->phys = kasprintf(GFP_KERNEL, "pci-%s/ir0", |
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pci_name(dev->pci)); |
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if (!kernel_ir->phys) { |
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ret = -ENOMEM; |
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goto err_out_free_name; |
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} |
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/* input device */ |
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rc = rc_allocate_device(RC_DRIVER_IR_RAW); |
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if (!rc) { |
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ret = -ENOMEM; |
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goto err_out_free_phys; |
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} |
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kernel_ir->rc = rc; |
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rc->device_name = kernel_ir->name; |
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rc->input_phys = kernel_ir->phys; |
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rc->input_id.bustype = BUS_PCI; |
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rc->input_id.version = 1; |
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if (dev->pci->subsystem_vendor) { |
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rc->input_id.vendor = dev->pci->subsystem_vendor; |
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rc->input_id.product = dev->pci->subsystem_device; |
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} else { |
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rc->input_id.vendor = dev->pci->vendor; |
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rc->input_id.product = dev->pci->device; |
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} |
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rc->dev.parent = &dev->pci->dev; |
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rc->allowed_protocols = allowed_protos; |
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rc->priv = kernel_ir; |
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rc->open = cx23885_input_ir_open; |
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rc->close = cx23885_input_ir_close; |
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rc->map_name = rc_map; |
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rc->driver_name = MODULE_NAME; |
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/* Go */ |
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dev->kernel_ir = kernel_ir; |
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ret = rc_register_device(rc); |
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if (ret) |
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goto err_out_stop; |
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return 0; |
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err_out_stop: |
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cx23885_input_ir_stop(dev); |
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dev->kernel_ir = NULL; |
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rc_free_device(rc); |
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err_out_free_phys: |
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kfree(kernel_ir->phys); |
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err_out_free_name: |
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kfree(kernel_ir->name); |
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err_out_free: |
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kfree(kernel_ir); |
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return ret; |
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} |
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void cx23885_input_fini(struct cx23885_dev *dev) |
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{ |
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/* Always stop the IR hardware from generating interrupts */ |
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cx23885_input_ir_stop(dev); |
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if (dev->kernel_ir == NULL) |
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return; |
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rc_unregister_device(dev->kernel_ir->rc); |
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kfree(dev->kernel_ir->phys); |
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kfree(dev->kernel_ir->name); |
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kfree(dev->kernel_ir); |
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dev->kernel_ir = NULL; |
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}
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