--- /dev/null
+/* speakup_soft.c - speakup driver to register and make available
+ * a user space device for software synthesizers. written by: Kirk
+ * Reiser <kirk@braille.uwo.ca>
+ *
+ * Copyright (C) 2003 Kirk Reiser.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * this code is specificly written as a driver for the speakup screenreview
+ * package and is not a general device driver. */
+
+#include <linux/unistd.h>
+#include <linux/miscdevice.h> /* for misc_register, and SYNTH_MINOR */
+#include <linux/poll.h> /* for poll_wait() */
+#include <linux/sched.h> /* schedule(), signal_pending(), TASK_INTERRUPTIBLE */
+
+#include "spk_priv.h"
+#include "speakup.h"
+
+#define DRV_VERSION "2.6"
+#define SOFTSYNTH_MINOR 26 /* might as well give it one more than /dev/synth */
+#define PROCSPEECH 0x0d
+#define CLEAR_SYNTH 0x18
+
+static int softsynth_probe(struct spk_synth *synth);
+static void softsynth_release(void);
+static int softsynth_is_alive(struct spk_synth *synth);
+static unsigned char get_index(void);
+
+static struct miscdevice synth_device;
+static int initialized;
+static int misc_registered;
+
+static struct var_t vars[] = {
+ { CAPS_START, .u.s = {"\x01+3p" } },
+ { CAPS_STOP, .u.s = {"\x01-3p" } },
+ { RATE, .u.n = {"\x01%ds", 5, 0, 9, 0, 0, NULL } },
+ { PITCH, .u.n = {"\x01%dp", 5, 0, 9, 0, 0, NULL } },
+ { VOL, .u.n = {"\x01%dv", 5, 0, 9, 0, 0, NULL } },
+ { TONE, .u.n = {"\x01%dx", 1, 0, 2, 0, 0, NULL } },
+ { PUNCT, .u.n = {"\x01%db", 0, 0, 2, 0, 0, NULL } },
+ { VOICE, .u.n = {"\x01%do", 0, 0, 7, 0, 0, NULL } },
+ { FREQUENCY, .u.n = {"\x01%df", 5, 0, 9, 0, 0, NULL } },
+ { DIRECT, .u.n = {NULL, 0, 0, 1, 0, 0, NULL } },
+ V_LAST_VAR
+};
+
+/*
+ * These attributes will appear in /sys/accessibility/speakup/soft.
+ */
+static struct kobj_attribute caps_start_attribute =
+ __ATTR(caps_start, USER_RW, spk_var_show, spk_var_store);
+static struct kobj_attribute caps_stop_attribute =
+ __ATTR(caps_stop, USER_RW, spk_var_show, spk_var_store);
+static struct kobj_attribute freq_attribute =
+ __ATTR(freq, USER_RW, spk_var_show, spk_var_store);
+static struct kobj_attribute pitch_attribute =
+ __ATTR(pitch, USER_RW, spk_var_show, spk_var_store);
+static struct kobj_attribute punct_attribute =
+ __ATTR(punct, USER_RW, spk_var_show, spk_var_store);
+static struct kobj_attribute rate_attribute =
+ __ATTR(rate, USER_RW, spk_var_show, spk_var_store);
+static struct kobj_attribute tone_attribute =
+ __ATTR(tone, USER_RW, spk_var_show, spk_var_store);
+static struct kobj_attribute voice_attribute =
+ __ATTR(voice, USER_RW, spk_var_show, spk_var_store);
+static struct kobj_attribute vol_attribute =
+ __ATTR(vol, USER_RW, spk_var_show, spk_var_store);
+
+/*
+ * We should uncomment the following definition, when we agree on a
+ * method of passing a language designation to the software synthesizer.
+ * static struct kobj_attribute lang_attribute =
+ * __ATTR(lang, USER_RW, spk_var_show, spk_var_store);
+ */
+
+static struct kobj_attribute delay_time_attribute =
+ __ATTR(delay_time, ROOT_W, spk_var_show, spk_var_store);
+static struct kobj_attribute direct_attribute =
+ __ATTR(direct, USER_RW, spk_var_show, spk_var_store);
+static struct kobj_attribute full_time_attribute =
+ __ATTR(full_time, ROOT_W, spk_var_show, spk_var_store);
+static struct kobj_attribute jiffy_delta_attribute =
+ __ATTR(jiffy_delta, ROOT_W, spk_var_show, spk_var_store);
+static struct kobj_attribute trigger_time_attribute =
+ __ATTR(trigger_time, ROOT_W, 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,
+ &freq_attribute.attr,
+/* &lang_attribute.attr, */
+ &pitch_attribute.attr,
+ &punct_attribute.attr,
+ &rate_attribute.attr,
+ &tone_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_soft = {
+ .name = "soft",
+ .version = DRV_VERSION,
+ .long_name = "software synth",
+ .init = "\01@\x01\x31y\n",
+ .procspeech = PROCSPEECH,
+ .delay = 0,
+ .trigger = 0,
+ .jiffies = 0,
+ .full = 0,
+ .startup = SYNTH_START,
+ .checkval = SYNTH_CHECK,
+ .vars = vars,
+ .probe = softsynth_probe,
+ .release = softsynth_release,
+ .synth_immediate = NULL,
+ .catch_up = NULL,
+ .flush = NULL,
+ .is_alive = softsynth_is_alive,
+ .synth_adjust = NULL,
+ .read_buff_add = NULL,
+ .get_index = get_index,
+ .indexing = {
+ .command = "\x01%di",
+ .lowindex = 1,
+ .highindex = 5,
+ .currindex = 1,
+ },
+ .attributes = {
+ .attrs = synth_attrs,
+ .name = "soft",
+ },
+};
+
+static char *get_initstring(void)
+{
+ static char buf[40];
+ char *cp;
+ struct var_t *var;
+
+ memset(buf, 0, sizeof(buf));
+ cp = buf;
+ var = synth_soft.vars;
+ while (var->var_id != MAXVARS) {
+ if (var->var_id != CAPS_START && var->var_id != CAPS_STOP
+ && var->var_id != DIRECT)
+ cp = cp + sprintf(cp, var->u.n.synth_fmt,
+ var->u.n.value);
+ var++;
+ }
+ cp = cp + sprintf(cp, "\n");
+ return buf;
+}
+
+static int softsynth_open(struct inode *inode, struct file *fp)
+{
+ unsigned long flags;
+ /*if ((fp->f_flags & O_ACCMODE) != O_RDONLY) */
+ /* return -EPERM; */
+ spk_lock(flags);
+ if (synth_soft.alive) {
+ spk_unlock(flags);
+ return -EBUSY;
+ }
+ synth_soft.alive = 1;
+ spk_unlock(flags);
+ return 0;
+}
+
+static int softsynth_close(struct inode *inode, struct file *fp)
+{
+ unsigned long flags;
+ spk_lock(flags);
+ synth_soft.alive = 0;
+ initialized = 0;
+ spk_unlock(flags);
+ /* Make sure we let applications go before leaving */
+ speakup_start_ttys();
+ return 0;
+}
+
+static ssize_t softsynth_read(struct file *fp, char *buf, size_t count,
+ loff_t *pos)
+{
+ int chars_sent = 0;
+ char *cp;
+ char *init;
+ char ch;
+ int empty;
+ unsigned long flags;
+ DEFINE_WAIT(wait);
+
+ spk_lock(flags);
+ while (1) {
+ prepare_to_wait(&speakup_event, &wait, TASK_INTERRUPTIBLE);
+ if (!synth_buffer_empty() || speakup_info.flushing)
+ break;
+ spk_unlock(flags);
+ if (fp->f_flags & O_NONBLOCK) {
+ finish_wait(&speakup_event, &wait);
+ return -EAGAIN;
+ }
+ if (signal_pending(current)) {
+ finish_wait(&speakup_event, &wait);
+ return -ERESTARTSYS;
+ }
+ schedule();
+ spk_lock(flags);
+ }
+ finish_wait(&speakup_event, &wait);
+
+ cp = buf;
+ init = get_initstring();
+ while (chars_sent < count) {
+ if (speakup_info.flushing) {
+ speakup_info.flushing = 0;
+ ch = '\x18';
+ } else if (synth_buffer_empty()) {
+ break;
+ } else if (!initialized) {
+ if (*init) {
+ ch = *init;
+ init++;
+ } else {
+ initialized = 1;
+ }
+ } else {
+ ch = synth_buffer_getc();
+ }
+ spk_unlock(flags);
+ if (copy_to_user(cp, &ch, 1))
+ return -EFAULT;
+ spk_lock(flags);
+ chars_sent++;
+ cp++;
+ }
+ *pos += chars_sent;
+ empty = synth_buffer_empty();
+ spk_unlock(flags);
+ if (empty) {
+ speakup_start_ttys();
+ *pos = 0;
+ }
+ return chars_sent;
+}
+
+static int last_index;
+
+static ssize_t softsynth_write(struct file *fp, const char *buf, size_t count,
+ loff_t *pos)
+{
+ unsigned long supplied_index = 0;
+ int converted;
+ char indbuf[5];
+ if (count >= sizeof(indbuf))
+ return -EINVAL;
+
+ if (copy_from_user(indbuf, buf, count))
+ return -EFAULT;
+ indbuf[count] = '\0';
+
+ converted = strict_strtoul(indbuf, 0, &supplied_index);
+
+ if (converted < 0)
+ return converted;
+
+ last_index = supplied_index;
+ return count;
+}
+
+static unsigned int softsynth_poll(struct file *fp,
+ struct poll_table_struct *wait)
+{
+ unsigned long flags;
+ int ret = 0;
+ poll_wait(fp, &speakup_event, wait);
+
+ spk_lock(flags);
+ if (!synth_buffer_empty() || speakup_info.flushing)
+ ret = POLLIN | POLLRDNORM;
+ spk_unlock(flags);
+ return ret;
+}
+
+static unsigned char get_index(void)
+{
+ int rv;
+ rv = last_index;
+ last_index = 0;
+ return rv;
+}
+
+static const struct file_operations softsynth_fops = {
+ .owner = THIS_MODULE,
+ .poll = softsynth_poll,
+ .read = softsynth_read,
+ .write = softsynth_write,
+ .open = softsynth_open,
+ .release = softsynth_close,
+};
+
+
+static int softsynth_probe(struct spk_synth *synth)
+{
+
+ if (misc_registered != 0)
+ return 0;
+ memset(&synth_device, 0, sizeof(synth_device));
+ synth_device.minor = SOFTSYNTH_MINOR;
+ synth_device.name = "softsynth";
+ synth_device.fops = &softsynth_fops;
+ if (misc_register(&synth_device)) {
+ pr_warn("Couldn't initialize miscdevice /dev/softsynth.\n");
+ return -ENODEV;
+ }
+
+ misc_registered = 1;
+ pr_info("initialized device: /dev/softsynth, node (MAJOR 10, MINOR 26)\n");
+ return 0;
+}
+
+static void softsynth_release(void)
+{
+ misc_deregister(&synth_device);
+ misc_registered = 0;
+ pr_info("unregistered /dev/softsynth\n");
+}
+
+static int softsynth_is_alive(struct spk_synth *synth)
+{
+ if (synth_soft.alive)
+ return 1;
+ return 0;
+}
+
+module_param_named(start, synth_soft.startup, short, S_IRUGO);
+
+MODULE_PARM_DESC(start, "Start the synthesizer once it is loaded.");
+
+
+static int __init soft_init(void)
+{
+ return synth_add(&synth_soft);
+}
+
+static void __exit soft_exit(void)
+{
+ synth_remove(&synth_soft);
+}
+
+module_init(soft_init);
+module_exit(soft_exit);
+MODULE_AUTHOR("Kirk Reiser <kirk@braille.uwo.ca>");
+MODULE_DESCRIPTION("Speakup userspace software synthesizer support");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);
+
projects / mv-sheeva.git / blobdiff