e5514f104d
Interrupts from the AV Core are best handled by a workqueue handler since many I2C transactions are required to service the AV Core interrupt. The AV_CORE PCI interrupt is disabled by the IRQ handler and reenabled when the work handler is finished. Signed-off-by: Andy Walls <awalls@md.metrocast.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
117 lines
3.8 KiB
C
117 lines
3.8 KiB
C
/*
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* Driver for the Conexant CX23885/7/8 PCIe bridge
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*
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* Infrared device support routines - non-input, non-vl42_subdev routines
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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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* 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 <media/v4l2-device.h>
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#include "cx23885.h"
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#include "cx23885-input.h"
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#define CX23885_IR_RX_FIFO_SERVICE_REQ 0
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#define CX23885_IR_RX_END_OF_RX_DETECTED 1
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#define CX23885_IR_RX_HW_FIFO_OVERRUN 2
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#define CX23885_IR_RX_SW_FIFO_OVERRUN 3
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#define CX23885_IR_TX_FIFO_SERVICE_REQ 0
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void cx23885_ir_rx_work_handler(struct work_struct *work)
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{
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struct cx23885_dev *dev =
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container_of(work, struct cx23885_dev, ir_rx_work);
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u32 events = 0;
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unsigned long *notifications = &dev->ir_rx_notifications;
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if (test_and_clear_bit(CX23885_IR_RX_SW_FIFO_OVERRUN, notifications))
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events |= V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN;
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if (test_and_clear_bit(CX23885_IR_RX_HW_FIFO_OVERRUN, notifications))
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events |= V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN;
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if (test_and_clear_bit(CX23885_IR_RX_END_OF_RX_DETECTED, notifications))
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events |= V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED;
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if (test_and_clear_bit(CX23885_IR_RX_FIFO_SERVICE_REQ, notifications))
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events |= V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ;
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if (events == 0)
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return;
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if (dev->kernel_ir)
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cx23885_input_rx_work_handler(dev, events);
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}
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void cx23885_ir_tx_work_handler(struct work_struct *work)
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{
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struct cx23885_dev *dev =
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container_of(work, struct cx23885_dev, ir_tx_work);
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u32 events = 0;
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unsigned long *notifications = &dev->ir_tx_notifications;
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if (test_and_clear_bit(CX23885_IR_TX_FIFO_SERVICE_REQ, notifications))
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events |= V4L2_SUBDEV_IR_TX_FIFO_SERVICE_REQ;
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if (events == 0)
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return;
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}
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/* Possibly called in an IRQ context */
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void cx23885_ir_rx_v4l2_dev_notify(struct v4l2_subdev *sd, u32 events)
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{
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struct cx23885_dev *dev = to_cx23885(sd->v4l2_dev);
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unsigned long *notifications = &dev->ir_rx_notifications;
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if (events & V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ)
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set_bit(CX23885_IR_RX_FIFO_SERVICE_REQ, notifications);
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if (events & V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED)
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set_bit(CX23885_IR_RX_END_OF_RX_DETECTED, notifications);
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if (events & V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN)
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set_bit(CX23885_IR_RX_HW_FIFO_OVERRUN, notifications);
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if (events & V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN)
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set_bit(CX23885_IR_RX_SW_FIFO_OVERRUN, notifications);
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/*
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* For the integrated AV core, we are already in a workqueue context.
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* For the CX23888 integrated IR, we are in an interrupt context.
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*/
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if (sd == dev->sd_cx25840)
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cx23885_ir_rx_work_handler(&dev->ir_rx_work);
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else
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schedule_work(&dev->ir_rx_work);
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}
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/* Possibly called in an IRQ context */
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void cx23885_ir_tx_v4l2_dev_notify(struct v4l2_subdev *sd, u32 events)
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{
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struct cx23885_dev *dev = to_cx23885(sd->v4l2_dev);
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unsigned long *notifications = &dev->ir_tx_notifications;
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if (events & V4L2_SUBDEV_IR_TX_FIFO_SERVICE_REQ)
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set_bit(CX23885_IR_TX_FIFO_SERVICE_REQ, notifications);
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/*
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* For the integrated AV core, we are already in a workqueue context.
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* For the CX23888 integrated IR, we are in an interrupt context.
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*/
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if (sd == dev->sd_cx25840)
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cx23885_ir_tx_work_handler(&dev->ir_tx_work);
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else
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schedule_work(&dev->ir_tx_work);
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}
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