| /* 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. |
| * |
| * |
| * 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 init_pos; |
| 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", 2, 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, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store); |
| static struct kobj_attribute caps_stop_attribute = |
| __ATTR(caps_stop, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store); |
| static struct kobj_attribute freq_attribute = |
| __ATTR(freq, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store); |
| static struct kobj_attribute pitch_attribute = |
| __ATTR(pitch, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store); |
| static struct kobj_attribute punct_attribute = |
| __ATTR(punct, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store); |
| static struct kobj_attribute rate_attribute = |
| __ATTR(rate, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store); |
| static struct kobj_attribute tone_attribute = |
| __ATTR(tone, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store); |
| static struct kobj_attribute voice_attribute = |
| __ATTR(voice, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store); |
| static struct kobj_attribute vol_attribute = |
| __ATTR(vol, S_IWUSR|S_IRUGO, 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, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store); |
| */ |
| |
| static struct kobj_attribute delay_time_attribute = |
| __ATTR(delay_time, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store); |
| static struct kobj_attribute direct_attribute = |
| __ATTR(direct, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store); |
| static struct kobj_attribute full_time_attribute = |
| __ATTR(full_time, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store); |
| static struct kobj_attribute jiffy_delta_attribute = |
| __ATTR(jiffy_delta, S_IWUSR|S_IRUGO, spk_var_show, spk_var_store); |
| static struct kobj_attribute trigger_time_attribute = |
| __ATTR(trigger_time, S_IWUSR|S_IRUGO, 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; */ |
| spin_lock_irqsave(&speakup_info.spinlock, flags); |
| if (synth_soft.alive) { |
| spin_unlock_irqrestore(&speakup_info.spinlock, flags); |
| return -EBUSY; |
| } |
| synth_soft.alive = 1; |
| spin_unlock_irqrestore(&speakup_info.spinlock, flags); |
| return 0; |
| } |
| |
| static int softsynth_close(struct inode *inode, struct file *fp) |
| { |
| unsigned long flags; |
| |
| spin_lock_irqsave(&speakup_info.spinlock, flags); |
| synth_soft.alive = 0; |
| init_pos = 0; |
| spin_unlock_irqrestore(&speakup_info.spinlock, flags); |
| /* Make sure we let applications go before leaving */ |
| speakup_start_ttys(); |
| return 0; |
| } |
| |
| static ssize_t softsynth_read(struct file *fp, char __user *buf, size_t count, |
| loff_t *pos) |
| { |
| int chars_sent = 0; |
| char __user *cp; |
| char *init; |
| char ch; |
| int empty; |
| unsigned long flags; |
| DEFINE_WAIT(wait); |
| |
| spin_lock_irqsave(&speakup_info.spinlock, flags); |
| while (1) { |
| prepare_to_wait(&speakup_event, &wait, TASK_INTERRUPTIBLE); |
| if (!synth_buffer_empty() || speakup_info.flushing) |
| break; |
| spin_unlock_irqrestore(&speakup_info.spinlock, 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(); |
| spin_lock_irqsave(&speakup_info.spinlock, 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 (init[init_pos]) { |
| ch = init[init_pos++]; |
| } else { |
| ch = synth_buffer_getc(); |
| } |
| spin_unlock_irqrestore(&speakup_info.spinlock, flags); |
| if (copy_to_user(cp, &ch, 1)) |
| return -EFAULT; |
| spin_lock_irqsave(&speakup_info.spinlock, flags); |
| chars_sent++; |
| cp++; |
| } |
| *pos += chars_sent; |
| empty = synth_buffer_empty(); |
| spin_unlock_irqrestore(&speakup_info.spinlock, 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 __user *buf, |
| size_t count, loff_t *pos) |
| { |
| unsigned long supplied_index = 0; |
| int converted; |
| |
| converted = kstrtoul_from_user(buf, count, 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); |
| |
| spin_lock_irqsave(&speakup_info.spinlock, flags); |
| if (!synth_buffer_empty() || speakup_info.flushing) |
| ret = POLLIN | POLLRDNORM; |
| spin_unlock_irqrestore(&speakup_info.spinlock, 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."); |
| |
| module_spk_synth(synth_soft); |
| |
| MODULE_AUTHOR("Kirk Reiser <kirk@braille.uwo.ca>"); |
| MODULE_DESCRIPTION("Speakup userspace software synthesizer support"); |
| MODULE_LICENSE("GPL"); |
| MODULE_VERSION(DRV_VERSION); |