diff options
Diffstat (limited to 'drivers/accessibility/speakup/speakup_decext.c')
| -rw-r--r-- | drivers/accessibility/speakup/speakup_decext.c | 240 |
1 files changed, 240 insertions, 0 deletions
diff --git a/drivers/accessibility/speakup/speakup_decext.c b/drivers/accessibility/speakup/speakup_decext.c new file mode 100644 index 000000000..7408eb29c --- /dev/null +++ b/drivers/accessibility/speakup/speakup_decext.c @@ -0,0 +1,240 @@ +// 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. + * + * specificly written as a driver for the speakup screenreview + * s not a general device driver. + */ +#include <linux/jiffies.h> +#include <linux/sched.h> +#include <linux/timer.h> +#include <linux/kthread.h> + +#include "spk_priv.h" +#include "speakup.h" + +#define DRV_VERSION "2.14" +#define SYNTH_CLEAR 0x03 +#define PROCSPEECH 0x0b + +static volatile unsigned char last_char; + +static void read_buff_add(u_char ch) +{ + last_char = ch; +} + +static inline bool synth_full(void) +{ + return last_char == 0x13; +} + +static void do_catch_up(struct spk_synth *synth); +static void synth_flush(struct spk_synth *synth); + +static int in_escape; + +static struct var_t vars[] = { + { CAPS_START, .u.s = {"[:dv ap 222]" } }, + { CAPS_STOP, .u.s = {"[:dv ap 100]" } }, + { RATE, .u.n = {"[:ra %d]", 7, 0, 9, 150, 25, NULL } }, + { PITCH, .u.n = {"[:dv ap %d]", 100, 0, 100, 0, 0, NULL } }, + { INFLECTION, .u.n = {"[:dv pr %d] ", 100, 0, 10000, 0, 0, NULL } }, + { VOL, .u.n = {"[:dv gv %d]", 13, 0, 16, 0, 5, NULL } }, + { PUNCT, .u.n = {"[:pu %c]", 0, 0, 2, 0, 0, "nsa" } }, + { VOICE, .u.n = {"[:n%c]", 0, 0, 9, 0, 0, "phfdburwkv" } }, + { DIRECT, .u.n = {NULL, 0, 0, 1, 0, 0, NULL } }, + V_LAST_VAR +}; + +/* + * These attributes will appear in /sys/accessibility/speakup/decext. + */ +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 inflection_attribute = + __ATTR(inflection, 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 voice_attribute = + __ATTR(voice, 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, + &inflection_attribute.attr, + &punct_attribute.attr, + &rate_attribute.attr, + &voice_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 */ +}; + +static struct spk_synth synth_decext = { + .name = "decext", + .version = DRV_VERSION, + .long_name = "Dectalk External", + .init = "[:pe -380]", + .procspeech = PROCSPEECH, + .clear = SYNTH_CLEAR, + .delay = 500, + .trigger = 50, + .jiffies = 50, + .full = 40000, + .flags = SF_DEC, + .dev_name = SYNTH_DEFAULT_DEV, + .startup = SYNTH_START, + .checkval = SYNTH_CHECK, + .vars = vars, + .io_ops = &spk_ttyio_ops, + .probe = spk_ttyio_synth_probe, + .release = spk_ttyio_release, + .synth_immediate = spk_ttyio_synth_immediate, + .catch_up = do_catch_up, + .flush = synth_flush, + .is_alive = spk_synth_is_alive_restart, + .synth_adjust = NULL, + .read_buff_add = read_buff_add, + .get_index = NULL, + .indexing = { + .command = NULL, + .lowindex = 0, + .highindex = 0, + .currindex = 0, + }, + .attributes = { + .attrs = synth_attrs, + .name = "decext", + }, +}; + +static void do_catch_up(struct spk_synth *synth) +{ + u_char ch; + static u_char last = '\0'; + unsigned long flags; + unsigned long jiff_max; + struct var_t *jiffy_delta; + struct var_t *delay_time; + int jiffy_delta_val = 0; + int delay_time_val = 0; + + jiffy_delta = spk_get_var(JIFFY); + delay_time = spk_get_var(DELAY); + + spin_lock_irqsave(&speakup_info.spinlock, flags); + jiffy_delta_val = jiffy_delta->u.n.value; + spin_unlock_irqrestore(&speakup_info.spinlock, flags); + jiff_max = jiffies + jiffy_delta_val; + + while (!kthread_should_stop()) { + spin_lock_irqsave(&speakup_info.spinlock, flags); + if (speakup_info.flushing) { + speakup_info.flushing = 0; + spin_unlock_irqrestore(&speakup_info.spinlock, flags); + synth->flush(synth); + continue; + } + synth_buffer_skip_nonlatin1(); + if (synth_buffer_empty()) { + spin_unlock_irqrestore(&speakup_info.spinlock, flags); + break; + } + ch = synth_buffer_peek(); + set_current_state(TASK_INTERRUPTIBLE); + delay_time_val = delay_time->u.n.value; + spin_unlock_irqrestore(&speakup_info.spinlock, flags); + if (ch == '\n') + ch = 0x0D; + if (synth_full() || !synth->io_ops->synth_out(synth, ch)) { + schedule_timeout(msecs_to_jiffies(delay_time_val)); + continue; + } + set_current_state(TASK_RUNNING); + spin_lock_irqsave(&speakup_info.spinlock, flags); + synth_buffer_getc(); + spin_unlock_irqrestore(&speakup_info.spinlock, flags); + if (ch == '[') { + in_escape = 1; + } else if (ch == ']') { + in_escape = 0; + } else if (ch <= SPACE) { + if (!in_escape && strchr(",.!?;:", last)) + synth->io_ops->synth_out(synth, PROCSPEECH); + if (time_after_eq(jiffies, jiff_max)) { + if (!in_escape) + synth->io_ops->synth_out(synth, + PROCSPEECH); + spin_lock_irqsave(&speakup_info.spinlock, + flags); + jiffy_delta_val = jiffy_delta->u.n.value; + delay_time_val = delay_time->u.n.value; + spin_unlock_irqrestore(&speakup_info.spinlock, + flags); + schedule_timeout(msecs_to_jiffies + (delay_time_val)); + jiff_max = jiffies + jiffy_delta_val; + } + } + last = ch; + } + if (!in_escape) + synth->io_ops->synth_out(synth, PROCSPEECH); +} + +static void synth_flush(struct spk_synth *synth) +{ + in_escape = 0; + synth->io_ops->flush_buffer(); + synth->synth_immediate(synth, "\033P;10z\033\\"); +} + +module_param_named(ser, synth_decext.ser, int, 0444); +module_param_named(dev, synth_decext.dev_name, charp, 0444); +module_param_named(start, synth_decext.startup, short, 0444); + +MODULE_PARM_DESC(ser, "Set the serial port for the synthesizer (0-based)."); +MODULE_PARM_DESC(dev, "Set the device e.g. ttyUSB0, for the synthesizer."); +MODULE_PARM_DESC(start, "Start the synthesizer once it is loaded."); + +module_spk_synth(synth_decext); + +MODULE_AUTHOR("Kirk Reiser <kirk@braille.uwo.ca>"); +MODULE_AUTHOR("David Borowski"); +MODULE_DESCRIPTION("Speakup support for DECtalk External synthesizers"); +MODULE_LICENSE("GPL"); +MODULE_VERSION(DRV_VERSION); + |