diff options
Diffstat (limited to 'drivers/media/video/cx23885/cx23885-input.c')
| -rw-r--r-- | drivers/media/video/cx23885/cx23885-input.c | 365 |
1 files changed, 0 insertions, 365 deletions
diff --git a/drivers/media/video/cx23885/cx23885-input.c b/drivers/media/video/cx23885/cx23885-input.c deleted file mode 100644 index 56066721edc..00000000000 --- a/drivers/media/video/cx23885/cx23885-input.c +++ /dev/null @@ -1,365 +0,0 @@ -/* - * 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@infradead.org> - * Sascha Sommer <saschasommer@freenet.de> - * Copyright (C) 2004, 2005 Chris Pascoe - * Copyright (C) 2003, 2004 Gerd Knorr - * Copyright (C) 2003 Pavel Machek - * - * 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. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - */ - -#include <linux/slab.h> -#include <media/rc-core.h> -#include <media/v4l2-subdev.h> - -#include "cx23885.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: - /* - * 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, ¶ms); - 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, ¶ms); - } - - 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, ¶ms); - } -} - -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, ¶ms); - switch (dev->board) { - case CX23885_BOARD_HAUPPAUGE_HVR1270: - case CX23885_BOARD_HAUPPAUGE_HVR1850: - case CX23885_BOARD_HAUPPAUGE_HVR1290: - case CX23885_BOARD_HAUPPAUGE_HVR1250: - /* - * 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: - /* - * 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, ¶ms); - 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, ¶ms); - while (params.shutdown == false) { - params.enable = false; - params.interrupt_enable = false; - params.shutdown = true; - v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, ¶ms); - v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, ¶ms); - } - flush_work_sync(&dev->cx25840_work); - flush_work_sync(&dev->ir_rx_work); - flush_work_sync(&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; - enum rc_driver_type driver_type; - unsigned long 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: - /* Integrated CX2388[58] IR controller */ - driver_type = RC_DRIVER_IR_RAW; - allowed_protos = RC_TYPE_ALL; - /* The grey Hauppauge RC-5 remote */ - rc_map = RC_MAP_HAUPPAUGE; - break; - case CX23885_BOARD_TERRATEC_CINERGY_T_PCIE_DUAL: - /* Integrated CX23885 IR controller */ - driver_type = RC_DRIVER_IR_RAW; - allowed_protos = RC_TYPE_NEC; - /* 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 */ - driver_type = RC_DRIVER_IR_RAW; - allowed_protos = RC_TYPE_ALL; - /* A guess at the remote */ - rc_map = RC_MAP_TEVII_NEC; - 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); - kernel_ir->phys = kasprintf(GFP_KERNEL, "pci-%s/ir0", - pci_name(dev->pci)); - - /* input device */ - rc = rc_allocate_device(); - if (!rc) { - ret = -ENOMEM; - goto err_out_free; - } - - kernel_ir->rc = rc; - rc->input_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->driver_type = driver_type; - rc->allowed_protos = 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: - kfree(kernel_ir->phys); - kfree(kernel_ir->name); - 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; -} |