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linux-stable/drivers/media/pci/cx23885/cx23885-input.c
Thomas Gleixner c942fddf87 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157 
Based on 3 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version this program is distributed in the
  hope that it will be useful but without any warranty without even
  the implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version [author] [kishon] [vijay] [abraham]
  [i] [kishon]@[ti] [com] this program is distributed in the hope that
  it will be useful but without any warranty without even the implied
  warranty of merchantability or fitness for a particular purpose see
  the gnu general public license for more details

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version [author] [graeme] [gregory]
  [gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i]
  [kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema]
  [hk] [hemahk]@[ti] [com] this program is distributed in the hope
  that it will be useful but without any warranty without even the
  implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1105 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.202006027@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:37 -07:00

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