diff options
| -rw-r--r-- | drivers/media/video/cx23885/Makefile | 2 | ||||
| -rw-r--r-- | drivers/media/video/cx23885/cx23885-core.c | 3 | ||||
| -rw-r--r-- | drivers/media/video/cx23885/cx23885-input.c | 418 | ||||
| -rw-r--r-- | drivers/media/video/cx23885/cx23885-input.h | 30 | ||||
| -rw-r--r-- | drivers/media/video/cx23885/cx23885-ir.c | 4 | ||||
| -rw-r--r-- | drivers/media/video/cx23885/cx23885.h | 3 |
6 files changed, 459 insertions, 1 deletions
diff --git a/drivers/media/video/cx23885/Makefile b/drivers/media/video/cx23885/Makefile index 330cff3..bb46258 100644 --- a/drivers/media/video/cx23885/Makefile +++ b/drivers/media/video/cx23885/Makefile @@ -1,6 +1,6 @@ cx23885-objs := cx23885-cards.o cx23885-video.o cx23885-vbi.o \ cx23885-core.o cx23885-i2c.o cx23885-dvb.o cx23885-417.o \ - cx23885-ioctl.o cx23885-ir.o cx23888-ir.o \ + cx23885-ioctl.o cx23885-ir.o cx23885-input.o cx23888-ir.o \ netup-init.o cimax2.o netup-eeprom.o obj-$(CONFIG_VIDEO_CX23885) += cx23885.o diff --git a/drivers/media/video/cx23885/cx23885-core.c b/drivers/media/video/cx23885/cx23885-core.c index c879211..d6e41db 100644 --- a/drivers/media/video/cx23885/cx23885-core.c +++ b/drivers/media/video/cx23885/cx23885-core.c @@ -34,6 +34,7 @@ #include "cimax2.h" #include "cx23888-ir.h" #include "cx23885-ir.h" +#include "cx23885-input.h" MODULE_DESCRIPTION("Driver for cx23885 based TV cards"); MODULE_AUTHOR("Steven Toth <stoth@linuxtv.org>"); @@ -1959,6 +1960,7 @@ static int __devinit cx23885_initdev(struct pci_dev *pci_dev, * is hooked up by the call to request_irq() above. */ cx23885_ir_pci_int_enable(dev); + cx23885_input_init(dev); return 0; @@ -1976,6 +1978,7 @@ static void __devexit cx23885_finidev(struct pci_dev *pci_dev) struct v4l2_device *v4l2_dev = pci_get_drvdata(pci_dev); struct cx23885_dev *dev = to_cx23885(v4l2_dev); + cx23885_input_fini(dev); cx23885_ir_fini(dev); cx23885_shutdown(dev); diff --git a/drivers/media/video/cx23885/cx23885-input.c b/drivers/media/video/cx23885/cx23885-input.c new file mode 100644 index 0000000..c208079 --- /dev/null +++ b/drivers/media/video/cx23885/cx23885-input.c @@ -0,0 +1,418 @@ +/* + * 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@radix.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/input.h> +#include <media/ir-common.h> +#include <media/v4l2-subdev.h> + +#include "cx23885.h" + +#define RC5_BITS 14 +#define RC5_HALF_BITS (2*RC5_BITS) +#define RC5_HALF_BITS_MASK ((1 << RC5_HALF_BITS) - 1) + +#define RC5_START_BITS_NORMAL 0x3 /* Command range 0 - 63 */ +#define RC5_START_BITS_EXTENDED 0x2 /* Command range 64 - 127 */ + +#define RC5_EXTENDED_COMMAND_OFFSET 64 + +static inline unsigned int rc5_command(u32 rc5_baseband) +{ + return RC5_INSTR(rc5_baseband) + + ((RC5_START(rc5_baseband) == RC5_START_BITS_EXTENDED) + ? RC5_EXTENDED_COMMAND_OFFSET : 0); +} + +static void cx23885_input_process_raw_rc5(struct cx23885_dev *dev) +{ + struct card_ir *ir_input = dev->ir_input; + unsigned int code, command; + u32 rc5; + + /* Ignore codes that are too short to be valid RC-5 */ + if (ir_input->last_bit < (RC5_HALF_BITS - 1)) + return; + + /* The library has the manchester coding backwards; XOR to adapt. */ + code = (ir_input->code & RC5_HALF_BITS_MASK) ^ RC5_HALF_BITS_MASK; + rc5 = ir_rc5_decode(code); + + switch (RC5_START(rc5)) { + case RC5_START_BITS_NORMAL: + break; + case RC5_START_BITS_EXTENDED: + /* Don't allow if the remote only emits standard commands */ + if (ir_input->start == RC5_START_BITS_NORMAL) + return; + break; + default: + return; + } + + if (ir_input->addr != RC5_ADDR(rc5)) + return; + + /* Don't generate a keypress for RC-5 auto-repeated keypresses */ + command = rc5_command(rc5); + if (RC5_TOGGLE(rc5) != RC5_TOGGLE(ir_input->last_rc5) || + command != rc5_command(ir_input->last_rc5) || + /* Catch T == 0, CMD == 0 (e.g. '0') as first keypress after init */ + RC5_START(ir_input->last_rc5) == 0) { + /* This keypress is differnet: not an auto repeat */ + ir_input_nokey(ir_input->dev, &ir_input->ir); + ir_input_keydown(ir_input->dev, &ir_input->ir, + command, ir_input->code); + } + ir_input->last_rc5 = rc5; + + /* Schedule when we should do the key up event: ir_input_nokey() */ + mod_timer(&ir_input->timer_keyup, + jiffies + msecs_to_jiffies(ir_input->rc5_key_timeout)); +} + +static void cx23885_input_next_pulse_width_rc5(struct cx23885_dev *dev, + u32 ns_pulse) +{ + const int rc5_quarterbit_ns = 444444; /* 32 cycles/36 kHz/2 = 444 us */ + struct card_ir *ir_input = dev->ir_input; + int i, level, quarterbits, halfbits; + + if (!ir_input->active) { + ir_input->active = 1; + /* assume an initial space that we may not detect or measure */ + ir_input->code = 0; + ir_input->last_bit = 0; + } + + if (ns_pulse == V4L2_SUBDEV_IR_PULSE_RX_SEQ_END) { + ir_input->last_bit++; /* Account for the final space */ + ir_input->active = 0; + cx23885_input_process_raw_rc5(dev); + return; + } + + level = (ns_pulse & V4L2_SUBDEV_IR_PULSE_LEVEL_MASK) ? 1 : 0; + + /* Skip any leading space to sync to the start bit */ + if (ir_input->last_bit == 0 && level == 0) + return; + + /* + * With valid RC-5 we can get up to two consecutive half-bits in a + * single pulse measurment. Experiments have shown that the duration + * of a half-bit can vary. Make sure we always end up with an even + * number of quarter bits at the same level (mark or space). + */ + ns_pulse &= V4L2_SUBDEV_IR_PULSE_MAX_WIDTH_NS; + quarterbits = ns_pulse / rc5_quarterbit_ns; + if (quarterbits & 1) + quarterbits++; + halfbits = quarterbits / 2; + + for (i = 0; i < halfbits; i++) { + ir_input->last_bit++; + ir_input->code |= (level << ir_input->last_bit); + + if (ir_input->last_bit >= RC5_HALF_BITS-1) { + ir_input->active = 0; + cx23885_input_process_raw_rc5(dev); + /* + * If level is 1, a leading mark is invalid for RC5. + * If level is 0, we scan past extra intial space. + * Either way we don't want to reactivate collecting + * marks or spaces here with any left over half-bits. + */ + break; + } + } +} + +static void cx23885_input_process_pulse_widths_rc5(struct cx23885_dev *dev, + bool add_eom) +{ + struct card_ir *ir_input = dev->ir_input; + struct ir_input_state *ir_input_state = &ir_input->ir; + + u32 ns_pulse[RC5_HALF_BITS+1]; + ssize_t num = 0; + int count, i; + + do { + v4l2_subdev_call(dev->sd_ir, ir, rx_read, (u8 *) ns_pulse, + sizeof(ns_pulse), &num); + + count = num / sizeof(u32); + + /* Append an end of Rx seq, if the caller requested */ + if (add_eom && count < ARRAY_SIZE(ns_pulse)) { + ns_pulse[count] = V4L2_SUBDEV_IR_PULSE_RX_SEQ_END; + count++; + } + + /* Just drain the Rx FIFO, if we're called, but not RC-5 */ + if (ir_input_state->ir_type != IR_TYPE_RC5) + continue; + + for (i = 0; i < count; i++) + cx23885_input_next_pulse_width_rc5(dev, ns_pulse[i]); + } while (num != 0); +} + +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_HVR1850: + /* + * The only board 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_pulse_widths_rc5(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 void cx23885_input_ir_start(struct cx23885_dev *dev) +{ + struct card_ir *ir_input = dev->ir_input; + struct ir_input_state *ir_input_state = &ir_input->ir; + struct v4l2_subdev_ir_parameters params; + + if (dev->sd_ir == NULL) + return; + + atomic_set(&dev->ir_input_stopping, 0); + + /* keyup timer set up, if needed */ + switch (dev->board) { + case CX23885_BOARD_HAUPPAUGE_HVR1850: + setup_timer(&ir_input->timer_keyup, + ir_rc5_timer_keyup, /* Not actually RC-5 specific */ + (unsigned long) ir_input); + if (ir_input_state->ir_type == IR_TYPE_RC5) { + /* + * RC-5 repeats a held key every + * 64 bits * (2 * 32/36000) sec/bit = 113.778 ms + */ + ir_input->rc5_key_timeout = 115; + } + break; + } + + v4l2_subdev_call(dev->sd_ir, ir, rx_g_parameters, ¶ms); + switch (dev->board) { + case CX23885_BOARD_HAUPPAUGE_HVR1850: + /* + * 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 = true; + break; + } + v4l2_subdev_call(dev->sd_ir, ir, rx_s_parameters, ¶ms); +} + +static void cx23885_input_ir_stop(struct cx23885_dev *dev) +{ + struct card_ir *ir_input = dev->ir_input; + 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_scheduled_work(); + + switch (dev->board) { + case CX23885_BOARD_HAUPPAUGE_HVR1850: + del_timer_sync(&ir_input->timer_keyup); + break; + } +} + +int cx23885_input_init(struct cx23885_dev *dev) +{ + struct card_ir *ir; + struct input_dev *input_dev; + struct ir_scancode_table *ir_codes = NULL; + int ir_type, ir_addr, ir_start; + 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_HVR1850: + /* Parameters for the grey Hauppauge remote for the HVR-1850 */ + ir_codes = &ir_codes_hauppauge_new_table; + ir_type = IR_TYPE_RC5; + ir_addr = 0x1e; /* RC-5 system bits emitted by the remote */ + ir_start = RC5_START_BITS_NORMAL; /* A basic RC-5 remote */ + break; + } + if (ir_codes == NULL) + return -ENODEV; + + ir = kzalloc(sizeof(*ir), GFP_KERNEL); + input_dev = input_allocate_device(); + if (!ir || !input_dev) { + ret = -ENOMEM; + goto err_out_free; + } + + ir->dev = input_dev; + ir->addr = ir_addr; + ir->start = ir_start; + + /* init input device */ + snprintf(ir->name, sizeof(ir->name), "cx23885 IR (%s)", + cx23885_boards[dev->board].name); + snprintf(ir->phys, sizeof(ir->phys), "pci-%s/ir0", pci_name(dev->pci)); + + ir_input_init(input_dev, &ir->ir, ir_type, ir_codes); + input_dev->name = ir->name; + input_dev->phys = ir->phys; + input_dev->id.bustype = BUS_PCI; + input_dev->id.version = 1; + if (dev->pci->subsystem_vendor) { + input_dev->id.vendor = dev->pci->subsystem_vendor; + input_dev->id.product = dev->pci->subsystem_device; + } else { + input_dev->id.vendor = dev->pci->vendor; + input_dev->id.product = dev->pci->device; + } + input_dev->dev.parent = &dev->pci->dev; + + dev->ir_input = ir; + cx23885_input_ir_start(dev); + + ret = input_register_device(ir->dev); + if (ret) + goto err_out_stop; + + return 0; + +err_out_stop: + cx23885_input_ir_stop(dev); + dev->ir_input = NULL; +err_out_free: + input_free_device(input_dev); + kfree(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->ir_input == NULL) + return; + input_unregister_device(dev->ir_input->dev); + kfree(dev->ir_input); + dev->ir_input = NULL; +} diff --git a/drivers/media/video/cx23885/cx23885-input.h b/drivers/media/video/cx23885/cx23885-input.h new file mode 100644 index 0000000..3572cb1 --- /dev/null +++ b/drivers/media/video/cx23885/cx23885-input.h @@ -0,0 +1,30 @@ +/* + * Driver for the Conexant CX23885/7/8 PCIe bridge + * + * Infrared remote control input device + * + * Copyright (C) 2009 Andy Walls <awalls@radix.net> + * + * 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. + */ + +#ifndef _CX23885_INPUT_H_ +#define _CX23885_INPUT_H_ +int cx23885_input_rx_work_handler(struct cx23885_dev *dev, u32 events); + +int cx23885_input_init(struct cx23885_dev *dev); +void cx23885_input_fini(struct cx23885_dev *dev); +#endif diff --git a/drivers/media/video/cx23885/cx23885-ir.c b/drivers/media/video/cx23885/cx23885-ir.c index e84f90c..6ae982c 100644 --- a/drivers/media/video/cx23885/cx23885-ir.c +++ b/drivers/media/video/cx23885/cx23885-ir.c @@ -24,6 +24,7 @@ #include <media/v4l2-device.h> #include "cx23885.h" +#include "cx23885-input.h" #define CX23885_IR_RX_FIFO_SERVICE_REQ 0 #define CX23885_IR_RX_END_OF_RX_DETECTED 1 @@ -51,6 +52,9 @@ void cx23885_ir_rx_work_handler(struct work_struct *work) if (events == 0) return; + + if (dev->ir_input) + cx23885_input_rx_work_handler(dev, events); } void cx23885_ir_tx_work_handler(struct work_struct *work) diff --git a/drivers/media/video/cx23885/cx23885.h b/drivers/media/video/cx23885/cx23885.h index ce82698..1e0e935 100644 --- a/drivers/media/video/cx23885/cx23885.h +++ b/drivers/media/video/cx23885/cx23885.h @@ -363,6 +363,9 @@ struct cx23885_dev { struct work_struct ir_tx_work; unsigned long ir_tx_notifications; + struct card_ir *ir_input; + atomic_t ir_input_stopping; + /* V4l */ u32 freq; struct video_device *video_dev; |