| // 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 } }, |
| { 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 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, |
| &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); |
| |