| /* |
| * 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" |
| #include "cx23885-input.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(&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; |
| 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_BIT_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_BIT_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_BIT_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; |
| } |
