[mirror_ubuntu-artful-kernel.git] / drivers / staging / speakup / speakup_soft.c

/* 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 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);
Commit	Line	Data
c6e3fd22 WH	1	/* speakup_soft.c - speakup driver to register and make available
	2	* a user space device for software synthesizers. written by: Kirk
	3	* Reiser <kirk@braille.uwo.ca>
	4	*
	5	* Copyright (C) 2003 Kirk Reiser.
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	20	*
	21	* this code is specificly written as a driver for the speakup screenreview
7ea8778e CM	22	* package and is not a general device driver.
7ea8778e CM	23	*/
c6e3fd22 WH	24
	25	#include <linux/unistd.h>
	26	#include <linux/miscdevice.h> /* for misc_register, and SYNTH_MINOR */
	27	#include <linux/poll.h> /* for poll_wait() */
	28	#include <linux/sched.h> /* schedule(), signal_pending(), TASK_INTERRUPTIBLE */
	29
	30	#include "spk_priv.h"
	31	#include "speakup.h"
	32
	33	#define DRV_VERSION "2.6"
	34	#define SOFTSYNTH_MINOR 26 /* might as well give it one more than /dev/synth */
	35	#define PROCSPEECH 0x0d
	36	#define CLEAR_SYNTH 0x18
	37
	38	static int softsynth_probe(struct spk_synth *synth);
	39	static void softsynth_release(void);
	40	static int softsynth_is_alive(struct spk_synth *synth);
	41	static unsigned char get_index(void);
	42
	43	static struct miscdevice synth_device;
40fe4f89	44	static int init_pos;
c6e3fd22 WH	45	static int misc_registered;
	46
	47	static struct var_t vars[] = {
13f1a041 CB	48	{ CAPS_START, .u.s = {"\x01+3p" } },
13f1a041 CB	49	{ CAPS_STOP, .u.s = {"\x01-3p" } },
cfd75701	50	{ RATE, .u.n = {"\x01%ds", 2, 0, 9, 0, 0, NULL } },
13f1a041 CB	51	{ PITCH, .u.n = {"\x01%dp", 5, 0, 9, 0, 0, NULL } },
	52	{ VOL, .u.n = {"\x01%dv", 5, 0, 9, 0, 0, NULL } },
	53	{ TONE, .u.n = {"\x01%dx", 1, 0, 2, 0, 0, NULL } },
	54	{ PUNCT, .u.n = {"\x01%db", 0, 0, 2, 0, 0, NULL } },
	55	{ VOICE, .u.n = {"\x01%do", 0, 0, 7, 0, 0, NULL } },
	56	{ FREQUENCY, .u.n = {"\x01%df", 5, 0, 9, 0, 0, NULL } },
	57	{ DIRECT, .u.n = {NULL, 0, 0, 1, 0, 0, NULL } },
c6e3fd22 WH	58	V_LAST_VAR
	59	};
	60
	61	/*
	62	* These attributes will appear in /sys/accessibility/speakup/soft.
	63	*/
	64	static struct kobj_attribute caps_start_attribute =
d901aaa7	65	__ATTR(caps_start, S_IWUSR\|S_IRUGO, spk_var_show, spk_var_store);
c6e3fd22	66	static struct kobj_attribute caps_stop_attribute =
d901aaa7	67	__ATTR(caps_stop, S_IWUSR\|S_IRUGO, spk_var_show, spk_var_store);
c6e3fd22	68	static struct kobj_attribute freq_attribute =
d901aaa7	69	__ATTR(freq, S_IWUSR\|S_IRUGO, spk_var_show, spk_var_store);
c6e3fd22	70	static struct kobj_attribute pitch_attribute =
d901aaa7	71	__ATTR(pitch, S_IWUSR\|S_IRUGO, spk_var_show, spk_var_store);
c6e3fd22	72	static struct kobj_attribute punct_attribute =
d901aaa7	73	__ATTR(punct, S_IWUSR\|S_IRUGO, spk_var_show, spk_var_store);
c6e3fd22	74	static struct kobj_attribute rate_attribute =
d901aaa7	75	__ATTR(rate, S_IWUSR\|S_IRUGO, spk_var_show, spk_var_store);
c6e3fd22	76	static struct kobj_attribute tone_attribute =
d901aaa7	77	__ATTR(tone, S_IWUSR\|S_IRUGO, spk_var_show, spk_var_store);
c6e3fd22	78	static struct kobj_attribute voice_attribute =
d901aaa7	79	__ATTR(voice, S_IWUSR\|S_IRUGO, spk_var_show, spk_var_store);
c6e3fd22	80	static struct kobj_attribute vol_attribute =
d901aaa7	81	__ATTR(vol, S_IWUSR\|S_IRUGO, spk_var_show, spk_var_store);
c6e3fd22	82
13f1a041 CB	83	/*
	84	* We should uncomment the following definition, when we agree on a
	85	* method of passing a language designation to the software synthesizer.
	86	* static struct kobj_attribute lang_attribute =
d901aaa7	87	* __ATTR(lang, S_IWUSR\|S_IRUGO, spk_var_show, spk_var_store);
13f1a041 CB	88	*/
13f1a041 CB	89
c6e3fd22	90	static struct kobj_attribute delay_time_attribute =
22c9bcad	91	__ATTR(delay_time, S_IWUSR\|S_IRUGO, spk_var_show, spk_var_store);
c6e3fd22	92	static struct kobj_attribute direct_attribute =
d901aaa7	93	__ATTR(direct, S_IWUSR\|S_IRUGO, spk_var_show, spk_var_store);
c6e3fd22	94	static struct kobj_attribute full_time_attribute =
22c9bcad	95	__ATTR(full_time, S_IWUSR\|S_IRUGO, spk_var_show, spk_var_store);
c6e3fd22	96	static struct kobj_attribute jiffy_delta_attribute =
22c9bcad	97	__ATTR(jiffy_delta, S_IWUSR\|S_IRUGO, spk_var_show, spk_var_store);
c6e3fd22	98	static struct kobj_attribute trigger_time_attribute =
22c9bcad	99	__ATTR(trigger_time, S_IWUSR\|S_IRUGO, spk_var_show, spk_var_store);
c6e3fd22 WH	100
	101	/*
	102	* Create a group of attributes so that we can create and destroy them all
	103	* at once.
	104	*/
	105	static struct attribute *synth_attrs[] = {
	106	&caps_start_attribute.attr,
	107	&caps_stop_attribute.attr,
	108	&freq_attribute.attr,
13f1a041	109	/* &lang_attribute.attr, */
c6e3fd22 WH	110	&pitch_attribute.attr,
	111	&punct_attribute.attr,
	112	&rate_attribute.attr,
	113	&tone_attribute.attr,
	114	&voice_attribute.attr,
	115	&vol_attribute.attr,
	116	&delay_time_attribute.attr,
	117	&direct_attribute.attr,
	118	&full_time_attribute.attr,
	119	&jiffy_delta_attribute.attr,
	120	&trigger_time_attribute.attr,
	121	NULL, /* need to NULL terminate the list of attributes */
	122	};
	123
	124	static struct spk_synth synth_soft = {
	125	.name = "soft",
	126	.version = DRV_VERSION,
	127	.long_name = "software synth",
	128	.init = "\01@\x01\x31y\n",
	129	.procspeech = PROCSPEECH,
	130	.delay = 0,
	131	.trigger = 0,
	132	.jiffies = 0,
	133	.full = 0,
	134	.startup = SYNTH_START,
	135	.checkval = SYNTH_CHECK,
	136	.vars = vars,
	137	.probe = softsynth_probe,
	138	.release = softsynth_release,
	139	.synth_immediate = NULL,
	140	.catch_up = NULL,
	141	.flush = NULL,
	142	.is_alive = softsynth_is_alive,
	143	.synth_adjust = NULL,
	144	.read_buff_add = NULL,
	145	.get_index = get_index,
	146	.indexing = {
	147	.command = "\x01%di",
	148	.lowindex = 1,
	149	.highindex = 5,
	150	.currindex = 1,
	151	},
	152	.attributes = {
	153	.attrs = synth_attrs,
	154	.name = "soft",
	155	},
	156	};
	157
	158	static char *get_initstring(void)
	159	{
	160	static char buf[40];
	161	char *cp;
	162	struct var_t *var;
	163
	164	memset(buf, 0, sizeof(buf));
	165	cp = buf;
	166	var = synth_soft.vars;
	167	while (var->var_id != MAXVARS) {
	168	if (var->var_id != CAPS_START && var->var_id != CAPS_STOP
	169	&& var->var_id != DIRECT)
13f1a041 CB	170	cp = cp + sprintf(cp, var->u.n.synth_fmt,
13f1a041 CB	171	var->u.n.value);
c6e3fd22 WH	172	var++;
	173	}
	174	cp = cp + sprintf(cp, "\n");
	175	return buf;
	176	}
	177
	178	static int softsynth_open(struct inode inode, struct file fp)
	179	{
	180	unsigned long flags;
	181	/if ((fp->f_flags & O_ACCMODE) != O_RDONLY) /
	182	/* return -EPERM; */
89c9df1b	183	spin_lock_irqsave(&speakup_info.spinlock, flags);
c6e3fd22	184	if (synth_soft.alive) {
89c9df1b	185	spin_unlock_irqrestore(&speakup_info.spinlock, flags);
c6e3fd22 WH	186	return -EBUSY;
	187	}
	188	synth_soft.alive = 1;
89c9df1b	189	spin_unlock_irqrestore(&speakup_info.spinlock, flags);
c6e3fd22 WH	190	return 0;
	191	}
	192
	193	static int softsynth_close(struct inode inode, struct file fp)
	194	{
	195	unsigned long flags;
8e69a811	196
89c9df1b	197	spin_lock_irqsave(&speakup_info.spinlock, flags);
c6e3fd22	198	synth_soft.alive = 0;
40fe4f89	199	init_pos = 0;
89c9df1b	200	spin_unlock_irqrestore(&speakup_info.spinlock, flags);
c6e3fd22 WH	201	/* Make sure we let applications go before leaving */
	202	speakup_start_ttys();
	203	return 0;
	204	}
	205
7c10f1cd	206	static ssize_t softsynth_read(struct file fp, char __user buf, size_t count,
c6e3fd22 WH	207	loff_t *pos)
	208	{
	209	int chars_sent = 0;
7c10f1cd	210	char __user *cp;
c6e3fd22 WH	211	char *init;
	212	char ch;
	213	int empty;
	214	unsigned long flags;
	215	DEFINE_WAIT(wait);
	216
89c9df1b	217	spin_lock_irqsave(&speakup_info.spinlock, flags);
c6e3fd22 WH	218	while (1) {
	219	prepare_to_wait(&speakup_event, &wait, TASK_INTERRUPTIBLE);
	220	if (!synth_buffer_empty() \|\| speakup_info.flushing)
	221	break;
89c9df1b	222	spin_unlock_irqrestore(&speakup_info.spinlock, flags);
c6e3fd22 WH	223	if (fp->f_flags & O_NONBLOCK) {
	224	finish_wait(&speakup_event, &wait);
	225	return -EAGAIN;
	226	}
	227	if (signal_pending(current)) {
	228	finish_wait(&speakup_event, &wait);
	229	return -ERESTARTSYS;
	230	}
	231	schedule();
89c9df1b	232	spin_lock_irqsave(&speakup_info.spinlock, flags);
c6e3fd22 WH	233	}
	234	finish_wait(&speakup_event, &wait);
	235
	236	cp = buf;
	237	init = get_initstring();
	238	while (chars_sent < count) {
	239	if (speakup_info.flushing) {
	240	speakup_info.flushing = 0;
	241	ch = '\x18';
	242	} else if (synth_buffer_empty()) {
	243	break;
40fe4f89 BH	244	} else if (init[init_pos]) {
40fe4f89 BH	245	ch = init[init_pos++];
c6e3fd22 WH	246	} else {
	247	ch = synth_buffer_getc();
	248	}
89c9df1b	249	spin_unlock_irqrestore(&speakup_info.spinlock, flags);
c6e3fd22 WH	250	if (copy_to_user(cp, &ch, 1))
c6e3fd22 WH	251	return -EFAULT;
89c9df1b	252	spin_lock_irqsave(&speakup_info.spinlock, flags);
c6e3fd22 WH	253	chars_sent++;
	254	cp++;
	255	}
	256	*pos += chars_sent;
	257	empty = synth_buffer_empty();
89c9df1b	258	spin_unlock_irqrestore(&speakup_info.spinlock, flags);
c6e3fd22 WH	259	if (empty) {
	260	speakup_start_ttys();
	261	*pos = 0;
	262	}
	263	return chars_sent;
	264	}
	265
13f1a041	266	static int last_index;
c6e3fd22	267
7c10f1cd EG	268	static ssize_t softsynth_write(struct file fp, const char __user buf,
7c10f1cd EG	269	size_t count, loff_t *pos)
c6e3fd22	270	{
13f1a041 CB	271	unsigned long supplied_index = 0;
13f1a041 CB	272	int converted;
c6e3fd22	273
6263ba55	274	converted = kstrtoul_from_user(buf, count, 0, &supplied_index);
13f1a041 CB	275
	276	if (converted < 0)
	277	return converted;
c6e3fd22	278
13f1a041	279	last_index = supplied_index;
c6e3fd22 WH	280	return count;
	281	}
	282
	283	static unsigned int softsynth_poll(struct file *fp,
	284	struct poll_table_struct *wait)
	285	{
	286	unsigned long flags;
	287	int ret = 0;
8e69a811	288
c6e3fd22 WH	289	poll_wait(fp, &speakup_event, wait);
c6e3fd22 WH	290
89c9df1b	291	spin_lock_irqsave(&speakup_info.spinlock, flags);
13f1a041	292	if (!synth_buffer_empty() \|\| speakup_info.flushing)
c6e3fd22	293	ret = POLLIN \| POLLRDNORM;
89c9df1b	294	spin_unlock_irqrestore(&speakup_info.spinlock, flags);
c6e3fd22 WH	295	return ret;
	296	}
	297
	298	static unsigned char get_index(void)
	299	{
	300	int rv;
8e69a811	301
c6e3fd22 WH	302	rv = last_index;
	303	last_index = 0;
	304	return rv;
	305	}
	306
13f1a041	307	static const struct file_operations softsynth_fops = {
c6e3fd22 WH	308	.owner = THIS_MODULE,
	309	.poll = softsynth_poll,
	310	.read = softsynth_read,
	311	.write = softsynth_write,
	312	.open = softsynth_open,
	313	.release = softsynth_close,
	314	};
	315
	316
	317	static int softsynth_probe(struct spk_synth *synth)
	318	{
	319
	320	if (misc_registered != 0)
	321	return 0;
	322	memset(&synth_device, 0, sizeof(synth_device));
	323	synth_device.minor = SOFTSYNTH_MINOR;
	324	synth_device.name = "softsynth";
	325	synth_device.fops = &softsynth_fops;
	326	if (misc_register(&synth_device)) {
	327	pr_warn("Couldn't initialize miscdevice /dev/softsynth.\n");
	328	return -ENODEV;
	329	}
	330
	331	misc_registered = 1;
	332	pr_info("initialized device: /dev/softsynth, node (MAJOR 10, MINOR 26)\n");
	333	return 0;
	334	}
	335
	336	static void softsynth_release(void)
	337	{
	338	misc_deregister(&synth_device);
	339	misc_registered = 0;
	340	pr_info("unregistered /dev/softsynth\n");
	341	}
	342
	343	static int softsynth_is_alive(struct spk_synth *synth)
	344	{
	345	if (synth_soft.alive)
	346	return 1;
	347	return 0;
	348	}
	349
	350	module_param_named(start, synth_soft.startup, short, S_IRUGO);
	351
	352	MODULE_PARM_DESC(start, "Start the synthesizer once it is loaded.");
	353
ae89facc	354	module_spk_synth(synth_soft);
c6e3fd22	355
c6e3fd22 WH	356	MODULE_AUTHOR("Kirk Reiser <kirk@braille.uwo.ca>");
	357	MODULE_DESCRIPTION("Speakup userspace software synthesizer support");
	358	MODULE_LICENSE("GPL");
	359	MODULE_VERSION(DRV_VERSION);