// 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 */
};

static struct spk_synth synth_audptr = {
        .name = "audptr",
        .version = DRV_VERSION,
        .long_name = "Audapter",
        .init = "\x05[D1]\x05[Ol]",
        .procspeech = PROCSPEECH,
        .clear = SYNTH_CLEAR,
        .delay = 400,
        .trigger = 50,
        .jiffies = 30,
        .full = 18000,
        .dev_name = SYNTH_DEFAULT_DEV,
        .startup = SYNTH_START,
        .checkval = SYNTH_CHECK,
        .vars = vars,
        .io_ops = &spk_ttyio_ops,
        .probe = synth_probe,
        .release = spk_ttyio_release,
        .synth_immediate = spk_ttyio_synth_immediate,
        .catch_up = spk_do_catch_up,
        .flush = synth_flush,
        .is_alive = spk_synth_is_alive_restart,
        .synth_adjust = NULL,
        .read_buff_add = NULL,
        .get_index = NULL,
        .indexing = {
                .command = NULL,
                .lowindex = 0,
                .highindex = 0,
                .currindex = 0,
        },
        .attributes = {
                .attrs = synth_attrs,
                .name = "audptr",
        },
};

static void synth_flush(struct spk_synth *synth)
{
        synth->io_ops->flush_buffer(synth);
        synth->io_ops->send_xchar(synth, SYNTH_CLEAR);
        synth->io_ops->synth_out(synth, PROCSPEECH);
}

static void synth_version(struct spk_synth *synth)
{
        unsigned i;
        char synth_id[33];

        synth->synth_immediate(synth, "\x05[Q]");
        synth_id[0] = synth->io_ops->synth_in(synth);
        if (synth_id[0] != 'A')
                return;

        for (i = 1; i < sizeof(synth_id) - 1; i++) {
                /* read version string from synth */
                synth_id[i] = synth->io_ops->synth_in(synth);
                if (synth_id[i] == '\n')
                        break;
        }
        synth_id[i] = '\0';
        pr_info("%s version: %s", synth->long_name, synth_id);
}

static int synth_probe(struct spk_synth *synth)
{
        int failed;

        failed = spk_ttyio_synth_probe(synth);
        if (failed == 0)
                synth_version(synth);
        synth->alive = !failed;
        return 0;
}

module_param_named(ser, synth_audptr.ser, int, 0444);
module_param_named(dev, synth_audptr.dev_name, charp, 0444);
module_param_named(start, synth_audptr.startup, short, 0444);
module_param_named(rate, vars[RATE_ID].u.n.default_val, int, 0444);
module_param_named(pitch, vars[PITCH_ID].u.n.default_val, int, 0444);
module_param_named(vol, vars[VOL_ID].u.n.default_val, int, 0444);
module_param_named(tone, vars[TONE_ID].u.n.default_val, int, 0444);
module_param_named(punct, vars[PUNCT_ID].u.n.default_val, int, 0444);
module_param_named(direct, vars[DIRECT_ID].u.n.default_val, int, 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_PARM_DESC(rate, "Set the rate variable on load.");
MODULE_PARM_DESC(pitch, "Set the pitch variable on load.");
MODULE_PARM_DESC(vol, "Set the vol variable on load.");
MODULE_PARM_DESC(tone, "Set the tone variable on load.");
MODULE_PARM_DESC(punct, "Set the punct variable on load.");
MODULE_PARM_DESC(direct, "Set the direct variable on load.");


module_spk_synth(synth_audptr);

MODULE_AUTHOR("Kirk Reiser <kirk@braille.uwo.ca>");
MODULE_AUTHOR("David Borowski");
MODULE_DESCRIPTION("Speakup support for Audapter synthesizer");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);