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c02e0d12a9
The CX23885 and CX25840 modules were using their own simple IR pulse width measurement record type which required conversion when passing to the new IR core. This change makes that record type consistent with the new IR core and removes a data conversion. Signed-off-by: Andy Walls <awalls@md.metrocast.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
357 lines
9.9 KiB
C
357 lines
9.9 KiB
C
/*
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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 <awalls@md.metrocast.net>
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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 <cavedon@sssup.it>
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* Markus Rechberger <mrechberger@gmail.com>
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* Mauro Carvalho Chehab <mchehab@infradead.org>
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* Sascha Sommer <saschasommer@freenet.de>
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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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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#include <linux/input.h>
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#include <linux/slab.h>
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#include <media/ir-core.h>
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#include <media/v4l2-subdev.h>
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#include "cx23885.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->inp_dev,
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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->inp_dev);
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else if (handle)
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ir_raw_event_handle(kernel_ir->inp_dev);
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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_HVR1850:
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case CX23885_BOARD_HAUPPAUGE_HVR1290:
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case CX23885_BOARD_TEVII_S470:
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case CX23885_BOARD_HAUPPAUGE_HVR1250:
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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_HVR1850:
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case CX23885_BOARD_HAUPPAUGE_HVR1290:
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case CX23885_BOARD_HAUPPAUGE_HVR1250:
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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_TEVII_S470:
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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(void *priv)
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{
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struct cx23885_kernel_ir *kernel_ir = 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_scheduled_work();
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}
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static void cx23885_input_ir_close(void *priv)
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{
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struct cx23885_kernel_ir *kernel_ir = 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 input_dev *inp_dev;
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struct ir_dev_props *props;
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char *rc_map;
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enum rc_driver_type driver_type;
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unsigned long 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_HVR1850:
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case CX23885_BOARD_HAUPPAUGE_HVR1290:
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case CX23885_BOARD_HAUPPAUGE_HVR1250:
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/* Integrated CX2388[58] IR controller */
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driver_type = RC_DRIVER_IR_RAW;
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allowed_protos = IR_TYPE_ALL;
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/* The grey Hauppauge RC-5 remote */
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rc_map = RC_MAP_RC5_HAUPPAUGE_NEW;
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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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driver_type = RC_DRIVER_IR_RAW;
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allowed_protos = IR_TYPE_ALL;
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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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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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kernel_ir->phys = kasprintf(GFP_KERNEL, "pci-%s/ir0",
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pci_name(dev->pci));
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/* input device */
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inp_dev = input_allocate_device();
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if (inp_dev == NULL) {
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ret = -ENOMEM;
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goto err_out_free;
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}
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kernel_ir->inp_dev = inp_dev;
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inp_dev->name = kernel_ir->name;
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inp_dev->phys = kernel_ir->phys;
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inp_dev->id.bustype = BUS_PCI;
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inp_dev->id.version = 1;
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if (dev->pci->subsystem_vendor) {
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inp_dev->id.vendor = dev->pci->subsystem_vendor;
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inp_dev->id.product = dev->pci->subsystem_device;
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} else {
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inp_dev->id.vendor = dev->pci->vendor;
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inp_dev->id.product = dev->pci->device;
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}
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inp_dev->dev.parent = &dev->pci->dev;
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/* kernel ir device properties */
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props = &kernel_ir->props;
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props->driver_type = driver_type;
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props->allowed_protos = allowed_protos;
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props->priv = kernel_ir;
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props->open = cx23885_input_ir_open;
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props->close = cx23885_input_ir_close;
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/* Go */
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dev->kernel_ir = kernel_ir;
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ret = ir_input_register(inp_dev, rc_map, props, MODULE_NAME);
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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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/* TODO: double check clean-up of kernel_ir->inp_dev */
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err_out_free:
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kfree(kernel_ir->phys);
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kfree(kernel_ir->name);
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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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ir_input_unregister(dev->kernel_ir->inp_dev);
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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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