drivers/accessibility/speakup/speakup_audptr.c

Source file repositories/reference/linux-study-clean/drivers/accessibility/speakup/speakup_audptr.c

File Facts

System
Linux kernel
Corpus path
drivers/accessibility/speakup/speakup_audptr.c
Extension
.c
Size
6247 bytes
Lines
198
Domain
Driver Families
Bucket
drivers/accessibility
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0+
/*
 * originally written by: Kirk Reiser <kirk@braille.uwo.ca>
 * this version considerably modified by David Borowski, david575@rogers.com
 *
 * Copyright (C) 1998-99  Kirk Reiser.
 * Copyright (C) 2003 David Borowski.
 *
 * specifically written as a driver for the speakup screenreview
 * s not a general device driver.
 */
#include "spk_priv.h"
#include "speakup.h"

#define DRV_VERSION "2.11"
#define SYNTH_CLEAR 0x18 /* flush synth buffer */
#define PROCSPEECH '\r' /* start synth processing speech char */

static int synth_probe(struct spk_synth *synth);
static void synth_flush(struct spk_synth *synth);


enum default_vars_id {
	CAPS_START_ID = 0, CAPS_STOP_ID,
	RATE_ID, PITCH_ID,
	VOL_ID, TONE_ID, PUNCT_ID,
	DIRECT_ID, V_LAST_VAR_ID,
	NB_ID
};

static struct var_t vars[NB_ID] = {
	[CAPS_START_ID] = { CAPS_START, .u.s = {"\x05[f99]" } },
	[CAPS_STOP_ID] = { CAPS_STOP, .u.s = {"\x05[f80]" } },
	[RATE_ID] = { RATE, .u.n = {"\x05[r%d]", 10, 0, 20, 100, -10, NULL } },
	[PITCH_ID] = { PITCH, .u.n = {"\x05[f%d]", 80, 39, 4500, 0, 0, NULL } },
	[VOL_ID] = { VOL, .u.n = {"\x05[g%d]", 21, 0, 40, 0, 0, NULL } },
	[TONE_ID] = { TONE, .u.n = {"\x05[s%d]", 9, 0, 63, 0, 0, NULL } },
	[PUNCT_ID] = { PUNCT, .u.n = {"\x05[A%c]", 0, 0, 3, 0, 0, "nmsa" } },
	[DIRECT_ID] = { DIRECT, .u.n = {NULL, 0, 0, 1, 0, 0, NULL } },
	V_LAST_VAR
};

/*
 * These attributes will appear in /sys/accessibility/speakup/audptr.
 */
static struct kobj_attribute caps_start_attribute =
	__ATTR(caps_start, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute caps_stop_attribute =
	__ATTR(caps_stop, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute pitch_attribute =
	__ATTR(pitch, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute punct_attribute =
	__ATTR(punct, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute rate_attribute =
	__ATTR(rate, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute tone_attribute =
	__ATTR(tone, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute vol_attribute =
	__ATTR(vol, 0644, spk_var_show, spk_var_store);

static struct kobj_attribute delay_time_attribute =
	__ATTR(delay_time, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute direct_attribute =
	__ATTR(direct, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute full_time_attribute =
	__ATTR(full_time, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute jiffy_delta_attribute =
	__ATTR(jiffy_delta, 0644, spk_var_show, spk_var_store);
static struct kobj_attribute trigger_time_attribute =
	__ATTR(trigger_time, 0644, spk_var_show, spk_var_store);

/*
 * Create a group of attributes so that we can create and destroy them all
 * at once.
 */
static struct attribute *synth_attrs[] = {
	&caps_start_attribute.attr,
	&caps_stop_attribute.attr,
	&pitch_attribute.attr,
	&punct_attribute.attr,
	&rate_attribute.attr,
	&tone_attribute.attr,
	&vol_attribute.attr,
	&delay_time_attribute.attr,
	&direct_attribute.attr,
	&full_time_attribute.attr,
	&jiffy_delta_attribute.attr,
	&trigger_time_attribute.attr,
	NULL,	/* need to NULL terminate the list of attributes */
};

Annotation

Implementation Notes