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/linux/Documentation/driver-api/media/
H A Drc-core.rst1 .. SPDX-License-Identifier: GPL-2.0
4 -------------------------
12 Every time a key is pressed on a remote controller, a scan code is produced.
23 infrared-based remote controllers, there's no key release event. Instead,
24 an extra code is produced to indicate key repeats.
33 hardware. When the carrier is switched on, it is called *PULSE*.
37 *PULSE* and *SPACE* events, each with a given duration.
40 *PULSE* and *SPACE* events depend on the protocol.
42 start with a 9ms *PULSE* and a 4.5ms SPACE. It then transmits 16 bits of
43 scan code, being 8 bits for address (usually it is a fixed number for a
[all …]
/linux/drivers/media/rc/
H A Dir-rc6-decoder.c1 // SPDX-License-Identifier: GPL-2.0-only
2 /* ir-rc6-decoder.c - A decoder for the RC6 IR protocol
7 #include "rc-core-priv.h"
12 * RC6-0-16 (standard toggle bit in header)
13 * RC6-6A-20 (no toggle bit)
14 * RC6-6A-24 (no toggle bit)
15 * RC6-6A-32 (MCE version with toggle bit in body)
33 #define RC6_6A_LCC_MASK 0xffff0000 /* RC6-6A-32 long customer code mask */
34 #define RC6_6A_MCE_CC 0x800f0000 /* MCE customer code */
35 #define RC6_6A_ZOTAC_CC 0x80340000 /* Zotac customer code */
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H A Dir-sanyo-decoder.c1 // SPDX-License-Identifier: GPL-2.0
2 // ir-sanyo-decoder.c - handle SANYO IR Pulse/Space protocol
7 // 13 bits Custom Code
8 // 13 bits NOT(Custom Code)
17 #include "rc-core-priv.h"
40 * ir_sanyo_decode() - Decode one SANYO pulse or space
42 * @ev: the struct ir_raw_event descriptor of the pulse/space
44 * This function returns -EINVAL if the pulse violates the state machine
48 struct sanyo_dec *data = &dev->raw->sanyo; in ir_sanyo_decode()
55 dev_dbg(&dev->dev, "SANYO event overflow received. reset to state 0\n"); in ir_sanyo_decode()
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H A Dite-cir.h1 /* SPDX-License-Identifier: GPL-2.0-or-later */
9 #define ITE_DRIVER_NAME "ite-cir"
34 /* hw-specific operation function pointers; most of these must be
43 /* make rx enter the idle state; keep listening for a pulse, but stop
98 /* duty cycle, 0-100 */
114 /* low-speed carrier frequency limits (Hz) */
118 /* high-speed carrier frequency limits (Hz) */
130 * n in RDCR produces a tolerance of +/- n * 6.25% around the center
135 * frequency A = (H - L) / (H + L). We can use this in order to honor the
136 * s_rx_carrier_range() call in ir-core. We'll suppose that any request
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H A Dite-cir.c1 // SPDX-License-Identifier: GPL-2.0-or-later
8 * skeleton provided by the nuvoton-cir driver.
10 * The lirc_it87 driver was originally written by Hans-Gunter Lutke Uphues
13 * <jimbo-lirc@edwardsclan.net>.
16 * <spmf2004-lirc@yahoo.fr> in 2008.
29 #include <media/rc-core.h>
32 #include "ite-cir.h"
42 static int model_number = -1;
47 /* HW-independent code functions */
79 freq = DIV_ROUND_CLOSEST(freq - ITE_LCF_MIN_CARRIER_FREQ, 1000); in ite_get_carrier_freq_bits()
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/linux/Documentation/userspace-api/media/rc/
H A Dlirc-dev-intro.rst1 .. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later
10 a bi-directional interface for transporting raw IR and decoded scancodes
21 .. code-block:: none
28 .. code-block:: none
30 $ ls -l /dev/lirc*
31 crw-rw---- 1 root root 248, 0 Jul 2 22:20 /dev/lirc0
33 Note that the package `v4l-utils <https://git.linuxtv.org/v4l-utils.git/>`_
36 - ir-ctl: can receive raw IR and transmit IR, as well as query LIRC
39 - ir-keytable: can load keymaps; allows you to set IR kernel protocols; load
52 .. _lirc-mode-scancode:
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H A Dlirc-write.rst1 .. SPDX-License-Identifier: GPL-2.0 OR GFDL-1.1-no-invariants-or-later
4 .. _lirc-write:
13 lirc-write - Write to a LIRC device
18 .. code-block:: c
47 When in :ref:`LIRC_MODE_PULSE <lirc-mode-PULSE>` mode, the data written to
48 the chardev is a pulse/space sequence of integer values. Pulses and spaces
50 with a pulse, therefore, the data must always include an uneven number of
55 When in :ref:`LIRC_MODE_SCANCODE <lirc-mode-scancode>` mode, one
70 of data required for one frame. On error, -1 is returned, and the ``errno``
72 :ref:`Generic Error Codes <gen-errors>` chapter.
/linux/drivers/media/rc/img-ir/
H A Dimg-ir-sanyo.c1 // SPDX-License-Identifier: GPL-2.0-or-later
5 * Copyright 2012-2014 Imagination Technologies Ltd.
7 * From ir-sanyo-decoder.c:
10 * 13 bits Custom Code
11 * 13 bits NOT(Custom Code)
19 #include "img-ir-hw.h"
26 /* a repeat code has no data */ in img_ir_sanyo_scancode()
30 return -EINVAL; in img_ir_sanyo_scancode()
37 return -EINVAL; in img_ir_sanyo_scancode()
40 return -EINVAL; in img_ir_sanyo_scancode()
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H A Dimg-ir-hw.h1 /* SPDX-License-Identifier: GPL-2.0-or-later */
5 * Copyright 2010-2014 Imagination Technologies Ltd.
12 #include <media/rc-core.h>
18 #define IMG_IR_CODETYPE_BIPHASE 0x2 /* RC-5/6 */
19 #define IMG_IR_CODETYPE_2BITPULSEPOS 0x3 /* RC-MM */
25 * struct img_ir_control - Decoder control settings
53 * struct img_ir_timing_range - range of timing values
65 * struct img_ir_symbol_timing - timing data for a symbol
66 * @pulse: Timing range for the length of the pulse in this symbol
70 struct img_ir_timing_range pulse; member
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H A Dimg-ir-nec.c1 // SPDX-License-Identifier: GPL-2.0-or-later
5 * Copyright 2010-2014 Imagination Technologies Ltd.
8 #include "img-ir-hw.h"
17 /* a repeat code has no data */ in img_ir_nec_scancode()
21 return -EINVAL; in img_ir_nec_scancode()
28 /* 32-bit NEC (used by Apple and TiVo remotes) */ in img_ir_nec_scancode()
30 request->scancode = bitrev8(addr) << 24 | in img_ir_nec_scancode()
34 request->protocol = RC_PROTO_NEC32; in img_ir_nec_scancode()
38 request->scancode = addr << 16 | in img_ir_nec_scancode()
41 request->protocol = RC_PROTO_NECX; in img_ir_nec_scancode()
[all …]
H A Dimg-ir-hw.c1 // SPDX-License-Identifier: GPL-2.0-or-later
5 * Copyright 2010-2014 Imagination Technologies Ltd.
7 * This ties into the input subsystem using the RC-core. Protocol support is
18 #include <media/rc-core.h>
19 #include "img-ir.h"
53 /* code type quirks */
59 * received any new data after an incomplete IR code is decoded.
68 if (range->max < range->min) in img_ir_timing_preprocess()
69 range->max = range->min; in img_ir_timing_preprocess()
72 range->min = (range->min*unit)/1000; in img_ir_timing_preprocess()
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/linux/arch/powerpc/platforms/44x/
H A Dfsp2.h33 #define PLB4OPB_GESR0 0x0 /* Error status 0: Master Dev 0-3 */
36 #define PLB4OPB_GESR1 0x4 /* Error Status 1: Master Dev 4-7 */
37 #define PLB4OPB_GESR2 0xC /* Error Status 2: Master Dev 8-11 */
39 /* PLB4-to-AHB Bridge */
54 /* PLB4-to-PLB6 Bridge */
60 /* PLB6-to-PLB4 Bridge */
66 /* PLB6-to-MCIF Bridge */
164 /* PLB-Attached DDR3/4 Core Wrapper */
198 #define CMUN_URCR3_P 0x26 /* Unit Reset Control Reg 3 Pulse */
199 #define CMUN_PW0 0x2C /* Pulse Width Register */
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/linux/arch/arm/boot/dts/marvell/
H A Dkirkwood-linksys-viper.dts1 // SPDX-License-Identifier: GPL-2.0
3 * kirkwood-viper.dts - Device Tree file for Linksys viper (E4200v2 / EA4500)
12 /dts-v1/;
15 #include "kirkwood-6282.dtsi"
19 compatible = "linksys,viper", "marvell,kirkwood-88f6282", "marvell,kirkwood";
31 stdout-path = "serial0:115200n8";
35 compatible = "gpio-keys";
36 pinctrl-0 = < &pmx_btn_wps &pmx_btn_reset >;
37 pinctrl-names = "default";
39 button-wps {
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/linux/drivers/media/usb/au0828/
H A Dau0828-input.c1 // SPDX-License-Identifier: GPL-2.0+
7 // Based on em28xx-input.c.
17 #include <media/rc-core.h>
47 struct i2c_msg msg = { .addr = ir->i2c_dev_addr, .flags = 0, in au8522_rc_write()
50 rc = i2c_transfer(ir->dev->i2c_client.adapter, &msg, 1); in au8522_rc_write()
55 return (rc == 1) ? 0 : -EIO; in au8522_rc_write()
63 struct i2c_msg msg[2] = { { .addr = ir->i2c_dev_addr, .flags = 0, in au8522_rc_read()
65 { .addr = ir->i2c_dev_addr, .flags = I2C_M_RD, in au8522_rc_read()
75 rc = i2c_transfer(ir->dev->i2c_client.adapter, msg, 2); in au8522_rc_read()
80 return (rc == 2) ? 0 : -EIO; in au8522_rc_read()
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/linux/sound/soc/tegra/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
5 tristate "SoC Audio for the Tegra System-on-Chip"
75 to interface with Pulse Density Modulation (PDM) input devices.
77 to Pulse Code Modulation (PCM) signals. This can be viewed as a
85 Config to enable the Inter-IC Sound (I2S) Controller which
86 implements full-duplex and bidirectional and single direction
87 point-to-point serial interfaces. It can interface with I2S
116 converts the multi-bit Pulse Code Modulation (PCM) audio input to
117 oversampled 1-bit Pulse Density Modulation (PDM) output. From the
119 that up-samples the input to the desired sampling rate by
[all …]
/linux/include/video/
H A Ds1d13xxxfb.h4 * (c) 2005 Thibaut VARENE <varenet@parisc-linux.org>
6 * Header file for Epson S1D13XXX driver code
26 #define S1DREG_REV_CODE 0x0000 /* Prod + Rev Code Register */
45 #define S1DREG_LCD_NDISP_HPER 0x0034 /* LCD Horizontal Non-Display Period Register: ((val)+1)*8)=N…
47 #define S1DREG_TFT_FPLINE_PWIDTH 0x0036 /* TFT FPLINE Pulse Width Register. */
50 #define S1DREG_LCD_NDISP_VPER 0x003A /* LCD Vertical Non-Display Period Register: (val)+1=NDlines …
52 #define S1DREG_TFT_FPFRAME_PWIDTH 0x003C /* TFT FPFRAME Pulse Width Register */
64 #define S1DREG_CRT_NDISP_HPER 0x0052 /* CRT/TV Horizontal Non-Display Period Register */
66 #define S1DREG_CRT_HRTC_PWIDTH 0x0054 /* CRT/TV HRTC Pulse Width Register */
69 #define S1DREG_CRT_NDISP_VPER 0x0058 /* CRT/TV Vertical Non-Display Period Register */
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/linux/drivers/hid/
H A Dhid-picolcd_cir.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2010-2012 by Bruno Prémont <bonbons@linux-vserver.org> *
11 #include <linux/hid-debug.h>
13 #include "hid-ids.h"
28 #include <media/rc-core.h>
30 #include "hid-picolcd.h"
41 spin_lock_irqsave(&data->lock, flags); in picolcd_raw_cir()
42 if (!data->rc_dev || (data->status & PICOLCD_CIR_SHUN)) { in picolcd_raw_cir()
43 spin_unlock_irqrestore(&data->lock, flags); in picolcd_raw_cir()
46 spin_unlock_irqrestore(&data->lock, flags); in picolcd_raw_cir()
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/linux/drivers/input/misc/
H A Dpowermate.c1 // SPDX-License-Identifier: GPL-2.0-only
20 * pulse or two on a direction change; the granularity is so fine that I never
88 struct powermate_device *pm = urb->context; in powermate_irq()
89 struct device *dev = &pm->intf->dev; in powermate_irq()
92 switch (urb->status) { in powermate_irq()
96 case -ECONNRESET: in powermate_irq()
97 case -ENOENT: in powermate_irq()
98 case -ESHUTDOWN: in powermate_irq()
100 dev_dbg(dev, "%s - urb shutting down with status: %d\n", in powermate_irq()
101 __func__, urb->status); in powermate_irq()
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/linux/Documentation/devicetree/bindings/sound/
H A Dnvidia,tegra186-dspk.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/sound/nvidia,tegra186-dspk.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 The Digital Speaker Controller (DSPK) can be viewed as a Pulse
11 Density Modulation (PDM) transmitter that up-samples the input to
13 over sampled Pulse Code Modulation (PCM) input to the desired 1-bit
17 - Jon Hunter <jonathanh@nvidia.com>
18 - Sameer Pujar <spujar@nvidia.com>
21 - $ref: dai-common.yaml#
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H A Dmaxim,max98357a.yaml1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Tzung-Bi Shih <tzungbi@kernel.org>
13 Maxim Integrated MAX98357A/MAX98360A is a digital pulse-code modulation (PCM)
17 - $ref: dai-common.yaml#
22 - maxim,max98357a
23 - maxim,max98360a
25 '#sound-dai-cells':
28 sdmode-gpios:
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/linux/drivers/net/phy/
H A Dbcm-phy-ptp.c1 // SPDX-License-Identifier: GPL-2.0
16 #include "bcm-phy-lib.h"
158 #define BCM_SKB_CB(skb) ((struct bcm_ptp_skb_cb *)(skb)->cb)
161 #define BCM_MAX_PULSE_8NS ((1U << 9) - 1)
162 #define BCM_MAX_PERIOD_8NS ((1U << 30) - 1)
165 ((phydev)->drv->phy_id & (phydev)->drv->phy_id_mask)
192 ts->tv_sec = (hb[3] << 16) | hb[2]; in bcm_ptp_get_framesync_ts()
193 ts->tv_nsec = (hb[1] << 16) | hb[0]; in bcm_ptp_get_framesync_ts()
213 /* trigger framesync - must have 0->1 transition. */ in bcm_ptp_framesync()
245 return reg & INTC_FSYNC ? 0 : -ETIMEDOUT; in bcm_ptp_framesync_ts()
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/linux/Documentation/fb/
H A Dmatroxfb.rst2 matroxfb - Framebuffer driver for Matrox devices
13 * Most important: boot logo :-)
31 box) and matroxfb (for graphics mode). You should not compile-in vesafb
32 unless you have primary display on non-Matrox VBE2.0 device (see
36 has [as addon] compatibility code):
40 -------------
55 -------------------------
70 ----------
83 Non-listed number can be achieved by more complicated command-line, for
90 XF{68,86}_FBDev should work just fine, but it is non-accelerated. On non-intel
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/linux/drivers/media/i2c/cx25840/
H A Dcx25840-ir.c1 // SPDX-License-Identifier: GPL-2.0-or-later
13 #include <media/drv-intf/cx25840.h>
14 #include <media/rc-core.h>
16 #include "cx25840-core.h"
117 return state ? state->ir_state : NULL; in to_ir_state()
135 d--; in count_to_clock_divider()
193 * FIFO register pulse width count computations
199 * the pulse width counter as read from the FIFO. The two lsb's are in clock_divider_to_resolution()
212 * The 2 lsb's of the pulse width timer count are not readable, hence in pulse_width_count_to_ns()
231 * The 2 lsb's of the pulse width timer count are not accessible, hence
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/linux/arch/arm/mach-sa1100/
H A Djornada720.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * linux/arch/arm/mach-sa1100/jornada720.c
5 * HP Jornada720 init code
17 #include <linux/platform_data/sa11x0-serial.h>
26 #include <asm/mach-types.h>
74 {0x0034,0x07}, // LCD Horizontal Non-Display Period Register
76 {0x0036,0x0B}, // TFT FPLINE Pulse Width Register
79 {0x003A,0x13}, // LCD Vertical Non-Display Period Register
81 {0x003C,0x01}, // TFT FPFRAME Pulse Width Register
93 {0x0052,0x13}, // CRT/TV Horizontal Non-Display Period Register
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/linux/drivers/media/i2c/
H A Dsaa711x_regs.h1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * saa711x - Philips SAA711x video decoder register specifications
10 /* Video Decoder - Frontend part */
16 /* Video Decoder - Decoder part */
196 /* SAA7113 bit-masks */
230 /* Video Decoder - Frontend part: R_01_INC_DELAY to R_05_INPUT_CNTL_4 */
242 /* Video Decoder - Decoder part: R_06_H_SYNC_START to R_1F_STATUS_BYTE_2_VD_DEC */
297 /* 0x20 to 0x22 - Reserved */
304 /* 0x26 to 0x28 - Reserved */
323 /* 0x33 - Reserved */
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