[deliverable/linux.git] / drivers / staging / speakup / speakup_dtlk.c

/*
 * 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.
 *
 * 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
 *
 * specificly written as a driver for the speakup screenreview
 * package it's not a general device driver.
 * This driver is for the RC Systems DoubleTalk PC internal synthesizer.
 */
#include <linux/jiffies.h>
#include <linux/sched.h>
#include <linux/timer.h>
#include <linux/kthread.h>

#include "spk_priv.h"
#include "serialio.h"
#include "speakup_dtlk.h" /* local header file for DoubleTalk values */
#include "speakup.h"

#define DRV_VERSION "2.10"
#define PROCSPEECH 0x00

static int synth_probe(struct spk_synth *synth);
static void dtlk_release(void);
static const char *synth_immediate(struct spk_synth *synth, const char *buf);
static void do_catch_up(struct spk_synth *synth);
static void synth_flush(struct spk_synth *synth);

static int synth_lpc;
static int port_forced;
static unsigned int synth_portlist[] = {
		 0x25e, 0x29e, 0x2de, 0x31e, 0x35e, 0x39e, 0
};
static u_char synth_status;

static struct var_t vars[] = {
	{ CAPS_START, .u.s = {"\x01+35p" } },
	{ CAPS_STOP, .u.s = {"\x01-35p" } },
	{ RATE, .u.n = {"\x01%ds", 8, 0, 9, 0, 0, NULL } },
	{ PITCH, .u.n = {"\x01%dp", 50, 0, 99, 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", 7, 0, 15, 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/dtlk.
 */
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);

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,
	&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_dtlk = {
	.name = "dtlk",
	.version = DRV_VERSION,
	.long_name = "DoubleTalk PC",
	.init = "\x01@\x01\x31y",
	.procspeech = PROCSPEECH,
	.clear = SYNTH_CLEAR,
	.delay = 500,
	.trigger = 30,
	.jiffies = 50,
	.full = 1000,
	.startup = SYNTH_START,
	.checkval = SYNTH_CHECK,
	.vars = vars,
	.probe = synth_probe,
	.release = dtlk_release,
	.synth_immediate = synth_immediate,
	.catch_up = do_catch_up,
	.flush = synth_flush,
	.is_alive = spk_synth_is_alive_nop,
	.synth_adjust = NULL,
	.read_buff_add = NULL,
	.get_index = spk_serial_in_nowait,
	.indexing = {
		.command = "\x01%di",
		.lowindex = 1,
		.highindex = 5,
		.currindex = 1,
	},
	.attributes = {
		.attrs = synth_attrs,
		.name = "dtlk",
	},
};

static inline bool synth_readable(void)
{
	synth_status = inb_p(speakup_info.port_tts + UART_RX);
	return (synth_status & TTS_READABLE) != 0;
}

static inline bool synth_writable(void)
{
	synth_status = inb_p(speakup_info.port_tts + UART_RX);
	return (synth_status & TTS_WRITABLE) != 0;
}

static inline bool synth_full(void)
{
	synth_status = inb_p(speakup_info.port_tts + UART_RX);
	return (synth_status & TTS_ALMOST_FULL) != 0;
}

static void spk_out(const char ch)
{
	int timeout = SPK_XMITR_TIMEOUT;
	while (!synth_writable()) {
		if (!--timeout)
			break;
		udelay(1);
	}
	outb_p(ch, speakup_info.port_tts);
	timeout = SPK_XMITR_TIMEOUT;
	while (synth_writable()) {
		if (!--timeout)
			break;
		udelay(1);
	}
}

static void do_catch_up(struct spk_synth *synth)
{
	u_char ch;
	unsigned long flags;
	unsigned long jiff_max;
	struct var_t *jiffy_delta;
	struct var_t *delay_time;
	int jiffy_delta_val;
	int delay_time_val;

	jiffy_delta = spk_get_var(JIFFY);
	delay_time = spk_get_var(DELAY);
	spk_lock(flags);
	jiffy_delta_val = jiffy_delta->u.n.value;
	spk_unlock(flags);
	jiff_max = jiffies + jiffy_delta_val;
	while (!kthread_should_stop()) {
		spk_lock(flags);
		if (speakup_info.flushing) {
			speakup_info.flushing = 0;
			spk_unlock(flags);
			synth->flush(synth);
			continue;
		}
		if (synth_buffer_empty()) {
			spk_unlock(flags);
			break;
		}
		set_current_state(TASK_INTERRUPTIBLE);
		delay_time_val = delay_time->u.n.value;
		spk_unlock(flags);
		if (synth_full()) {
			schedule_timeout(msecs_to_jiffies(delay_time_val));
			continue;
		}
		set_current_state(TASK_RUNNING);
		spk_lock(flags);
		ch = synth_buffer_getc();
		spk_unlock(flags);
		if (ch == '\n')
			ch = PROCSPEECH;
		spk_out(ch);
		if ((jiffies >= jiff_max) && (ch == SPACE)) {
			spk_out(PROCSPEECH);
			spk_lock(flags);
			delay_time_val = delay_time->u.n.value;
			jiffy_delta_val = jiffy_delta->u.n.value;
			spk_unlock(flags);
			schedule_timeout(msecs_to_jiffies(delay_time_val));
			jiff_max = jiffies + jiffy_delta_val;
		}
	}
	spk_out(PROCSPEECH);
}

static const char *synth_immediate(struct spk_synth *synth, const char *buf)
{
	u_char ch;
	while ((ch = (u_char)*buf)) {
		if (synth_full())
			return buf;
		if (ch == '\n')
			ch = PROCSPEECH;
		spk_out(ch);
		buf++;
	}
	return 0;
}

static void synth_flush(struct spk_synth *synth)
{
	outb_p(SYNTH_CLEAR, speakup_info.port_tts);
	while (synth_writable())
		cpu_relax();
}

static char synth_read_tts(void)
{
	u_char ch;
	while (!synth_readable())
		cpu_relax();
	ch = synth_status & 0x7f;
	outb_p(ch, speakup_info.port_tts);
	while (synth_readable())
		cpu_relax();
	return (char) ch;
}

/* interrogate the DoubleTalk PC and return its settings */
static struct synth_settings *synth_interrogate(struct spk_synth *synth)
{
	u_char *t;
	static char buf[sizeof(struct synth_settings) + 1];
	int total, i;
	static struct synth_settings status;
	synth_immediate(synth, "\x18\x01?");
	for (total = 0, i = 0; i < 50; i++) {
		buf[total] = synth_read_tts();
		if (total > 2 && buf[total] == 0x7f)
			break;
		if (total < sizeof(struct synth_settings))
			total++;
	}
	t = buf;
	/* serial number is little endian */
	status.serial_number = t[0] + t[1]*256;
	t += 2;
	for (i = 0; *t != '\r'; t++) {
		status.rom_version[i] = *t;
		if (i < sizeof(status.rom_version)-1)
			i++;
	}
	status.rom_version[i] = 0;
	t++;
	status.mode = *t++;
	status.punc_level = *t++;
	status.formant_freq = *t++;
	status.pitch = *t++;
	status.speed = *t++;
	status.volume = *t++;
	status.tone = *t++;
	status.expression = *t++;
	status.ext_dict_loaded = *t++;
	status.ext_dict_status = *t++;
	status.free_ram = *t++;
	status.articulation = *t++;
	status.reverb = *t++;
	status.eob = *t++;
	return &status;
}

static int synth_probe(struct spk_synth *synth)
{
		unsigned int port_val = 0;
	int i = 0;
	struct synth_settings *sp;
	pr_info("Probing for DoubleTalk.\n");
	if (port_forced) {
		speakup_info.port_tts = port_forced;
		pr_info("probe forced to %x by kernel command line\n",
				speakup_info.port_tts);
		if ((port_forced & 0xf) != 0xf)
			pr_info("warning: port base should probably end with f\n");
		if (synth_request_region(speakup_info.port_tts-1,
					SYNTH_IO_EXTENT)) {
			pr_warn("sorry, port already reserved\n");
			return -EBUSY;
		}
		port_val = inw(speakup_info.port_tts-1);
		synth_lpc = speakup_info.port_tts-1;
	} else {
		for (i = 0; synth_portlist[i]; i++) {
			if (synth_request_region(synth_portlist[i],
						SYNTH_IO_EXTENT))
				continue;
			port_val = inw(synth_portlist[i]) & 0xfbff;
			if (port_val == 0x107f) {
				synth_lpc = synth_portlist[i];
				speakup_info.port_tts = synth_lpc+1;
				break;
			}
			synth_release_region(synth_portlist[i],
					SYNTH_IO_EXTENT);
		}
	}
	port_val &= 0xfbff;
	if (port_val != 0x107f) {
		pr_info("DoubleTalk PC: not found\n");
		synth_release_region(synth_lpc, SYNTH_IO_EXTENT);
		return -ENODEV;
	}
	while (inw_p(synth_lpc) != 0x147f)
		cpu_relax(); /* wait until it's ready */
	sp = synth_interrogate(synth);
	pr_info("%s: %03x-%03x, ROM ver %s, s/n %u, driver: %s\n",
		synth->long_name, synth_lpc, synth_lpc+SYNTH_IO_EXTENT - 1,
	 sp->rom_version, sp->serial_number, synth->version);
	synth->alive = 1;
	return 0;
}

static void dtlk_release(void)
{
	if (speakup_info.port_tts)
		synth_release_region(speakup_info.port_tts-1, SYNTH_IO_EXTENT);
	speakup_info.port_tts = 0;
}

module_param_named(port, port_forced, int, S_IRUGO);
module_param_named(start, synth_dtlk.startup, short, S_IRUGO);

MODULE_PARM_DESC(port, "Set the port for the synthesizer (override probing).");
MODULE_PARM_DESC(start, "Start the synthesizer once it is loaded.");

static int __init dtlk_init(void)
{
	return synth_add(&synth_dtlk);
}

static void __exit dtlk_exit(void)
{
	synth_remove(&synth_dtlk);
}

module_init(dtlk_init);
module_exit(dtlk_exit);
MODULE_AUTHOR("Kirk Reiser <kirk@braille.uwo.ca>");
MODULE_AUTHOR("David Borowski");
MODULE_DESCRIPTION("Speakup support for DoubleTalk PC synthesizers");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);
Commit	Line	Data
c6e3fd22 WH	1	/*
	2	* originally written by: Kirk Reiser <kirk@braille.uwo.ca>
	3	* this version considerably modified by David Borowski, david575@rogers.com
	4	*
	5	* Copyright (C) 1998-99 Kirk Reiser.
	6	* Copyright (C) 2003 David Borowski.
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License as published by
	10	* the Free Software Foundation; either version 2 of the License, or
	11	* (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	21	*
	22	* specificly written as a driver for the speakup screenreview
	23	* package it's not a general device driver.
	24	* This driver is for the RC Systems DoubleTalk PC internal synthesizer.
	25	*/
	26	#include <linux/jiffies.h>
	27	#include <linux/sched.h>
	28	#include <linux/timer.h>
	29	#include <linux/kthread.h>
	30
	31	#include "spk_priv.h"
	32	#include "serialio.h"
	33	#include "speakup_dtlk.h" /* local header file for DoubleTalk values */
	34	#include "speakup.h"
	35
	36	#define DRV_VERSION "2.10"
	37	#define PROCSPEECH 0x00
c6e3fd22 WH	38
	39	static int synth_probe(struct spk_synth *synth);
	40	static void dtlk_release(void);
	41	static const char synth_immediate(struct spk_synth synth, const char *buf);
	42	static void do_catch_up(struct spk_synth *synth);
	43	static void synth_flush(struct spk_synth *synth);
	44
	45	static int synth_lpc;
	46	static int port_forced;
2c9e0cb0 CB	47	static unsigned int synth_portlist[] = {
	48	0x25e, 0x29e, 0x2de, 0x31e, 0x35e, 0x39e, 0
	49	};
c6e3fd22 WH	50	static u_char synth_status;
	51
	52	static struct var_t vars[] = {
2c9e0cb0 CB	53	{ CAPS_START, .u.s = {"\x01+35p" } },
	54	{ CAPS_STOP, .u.s = {"\x01-35p" } },
	55	{ RATE, .u.n = {"\x01%ds", 8, 0, 9, 0, 0, NULL } },
	56	{ PITCH, .u.n = {"\x01%dp", 50, 0, 99, 0, 0, NULL } },
	57	{ VOL, .u.n = {"\x01%dv", 5, 0, 9, 0, 0, NULL } },
	58	{ TONE, .u.n = {"\x01%dx", 1, 0, 2, 0, 0, NULL } },
	59	{ PUNCT, .u.n = {"\x01%db", 7, 0, 15, 0, 0, NULL } },
	60	{ VOICE, .u.n = {"\x01%do", 0, 0, 7, 0, 0, NULL } },
	61	{ FREQUENCY, .u.n = {"\x01%df", 5, 0, 9, 0, 0, NULL } },
	62	{ DIRECT, .u.n = {NULL, 0, 0, 1, 0, 0, NULL } },
c6e3fd22 WH	63	V_LAST_VAR
	64	};
	65
	66	/*
	67	* These attributes will appear in /sys/accessibility/speakup/dtlk.
	68	*/
	69	static struct kobj_attribute caps_start_attribute =
	70	__ATTR(caps_start, USER_RW, spk_var_show, spk_var_store);
	71	static struct kobj_attribute caps_stop_attribute =
	72	__ATTR(caps_stop, USER_RW, spk_var_show, spk_var_store);
	73	static struct kobj_attribute freq_attribute =
	74	__ATTR(freq, USER_RW, spk_var_show, spk_var_store);
	75	static struct kobj_attribute pitch_attribute =
	76	__ATTR(pitch, USER_RW, spk_var_show, spk_var_store);
	77	static struct kobj_attribute punct_attribute =
	78	__ATTR(punct, USER_RW, spk_var_show, spk_var_store);
	79	static struct kobj_attribute rate_attribute =
	80	__ATTR(rate, USER_RW, spk_var_show, spk_var_store);
	81	static struct kobj_attribute tone_attribute =
	82	__ATTR(tone, USER_RW, spk_var_show, spk_var_store);
	83	static struct kobj_attribute voice_attribute =
	84	__ATTR(voice, USER_RW, spk_var_show, spk_var_store);
	85	static struct kobj_attribute vol_attribute =
	86	__ATTR(vol, USER_RW, spk_var_show, spk_var_store);
	87
	88	static struct kobj_attribute delay_time_attribute =
	89	__ATTR(delay_time, ROOT_W, spk_var_show, spk_var_store);
	90	static struct kobj_attribute direct_attribute =
	91	__ATTR(direct, USER_RW, spk_var_show, spk_var_store);
	92	static struct kobj_attribute full_time_attribute =
	93	__ATTR(full_time, ROOT_W, spk_var_show, spk_var_store);
	94	static struct kobj_attribute jiffy_delta_attribute =
	95	__ATTR(jiffy_delta, ROOT_W, spk_var_show, spk_var_store);
	96	static struct kobj_attribute trigger_time_attribute =
	97	__ATTR(trigger_time, ROOT_W, spk_var_show, spk_var_store);
	98
	99	/*
	100	* Create a group of attributes so that we can create and destroy them all
	101	* at once.
	102	*/
	103	static struct attribute *synth_attrs[] = {
	104	&caps_start_attribute.attr,
	105	&caps_stop_attribute.attr,
	106	&freq_attribute.attr,
	107	&pitch_attribute.attr,
	108	&punct_attribute.attr,
	109	&rate_attribute.attr,
	110	&tone_attribute.attr,
	111	&voice_attribute.attr,
	112	&vol_attribute.attr,
	113	&delay_time_attribute.attr,
	114	&direct_attribute.attr,
	115	&full_time_attribute.attr,
	116	&jiffy_delta_attribute.attr,
	117	&trigger_time_attribute.attr,
	118	NULL, /* need to NULL terminate the list of attributes */
	119	};
	120
	121	static struct spk_synth synth_dtlk = {
	122	.name = "dtlk",
	123	.version = DRV_VERSION,
	124	.long_name = "DoubleTalk PC",
	125	.init = "\x01@\x01\x31y",
	126	.procspeech = PROCSPEECH,
127	.clear = SYNTH_CLEAR,
128	.delay = 500,
129	.trigger = 30,
130	.jiffies = 50,
131	.full = 1000,
132	.startup = SYNTH_START,
133	.checkval = SYNTH_CHECK,
134	.vars = vars,
135	.probe = synth_probe,
136	.release = dtlk_release,
137	.synth_immediate = synth_immediate,
138	.catch_up = do_catch_up,
139	.flush = synth_flush,
140	.is_alive = spk_synth_is_alive_nop,
141	.synth_adjust = NULL,
142	.read_buff_add = NULL,
143	.get_index = spk_serial_in_nowait,
144	.indexing = {
145	.command = "\x01%di",
146	.lowindex = 1,
147	.highindex = 5,
148	.currindex = 1,
149	},
150	.attributes = {
151	.attrs = synth_attrs,
152	.name = "dtlk",
153	},
154	};
155
2c9e0cb0 CB	156	static inline bool synth_readable(void)
	157	{
	158	synth_status = inb_p(speakup_info.port_tts + UART_RX);
	159	return (synth_status & TTS_READABLE) != 0;
	160	}
	161
	162	static inline bool synth_writable(void)
	163	{
	164	synth_status = inb_p(speakup_info.port_tts + UART_RX);
	165	return (synth_status & TTS_WRITABLE) != 0;
	166	}
	167
	168	static inline bool synth_full(void)
	169	{
	170	synth_status = inb_p(speakup_info.port_tts + UART_RX);
	171	return (synth_status & TTS_ALMOST_FULL) != 0;
	172	}
	173
c6e3fd22 WH	174	static void spk_out(const char ch)
	175	{
	176	int timeout = SPK_XMITR_TIMEOUT;
2c9e0cb0	177	while (!synth_writable()) {
c6e3fd22 WH	178	if (!--timeout)
	179	break;
	180	udelay(1);
	181	}
	182	outb_p(ch, speakup_info.port_tts);
	183	timeout = SPK_XMITR_TIMEOUT;
2c9e0cb0	184	while (synth_writable()) {
c6e3fd22 WH	185	if (!--timeout)
	186	break;
	187	udelay(1);
	188	}
	189	}
	190
	191	static void do_catch_up(struct spk_synth *synth)
	192	{
	193	u_char ch;
	194	unsigned long flags;
	195	unsigned long jiff_max;
	196	struct var_t *jiffy_delta;
	197	struct var_t *delay_time;
	198	int jiffy_delta_val;
	199	int delay_time_val;
	200
ca2beaf8 ST	201	jiffy_delta = spk_get_var(JIFFY);
ca2beaf8 ST	202	delay_time = spk_get_var(DELAY);
c6e3fd22 WH	203	spk_lock(flags);
	204	jiffy_delta_val = jiffy_delta->u.n.value;
	205	spk_unlock(flags);
	206	jiff_max = jiffies + jiffy_delta_val;
	207	while (!kthread_should_stop()) {
	208	spk_lock(flags);
	209	if (speakup_info.flushing) {
	210	speakup_info.flushing = 0;
	211	spk_unlock(flags);
	212	synth->flush(synth);
	213	continue;
	214	}
	215	if (synth_buffer_empty()) {
	216	spk_unlock(flags);
	217	break;
	218	}
	219	set_current_state(TASK_INTERRUPTIBLE);
	220	delay_time_val = delay_time->u.n.value;
	221	spk_unlock(flags);
	222	if (synth_full()) {
	223	schedule_timeout(msecs_to_jiffies(delay_time_val));
	224	continue;
	225	}
	226	set_current_state(TASK_RUNNING);
	227	spk_lock(flags);
	228	ch = synth_buffer_getc();
	229	spk_unlock(flags);
	230	if (ch == '\n')
	231	ch = PROCSPEECH;
	232	spk_out(ch);
	233	if ((jiffies >= jiff_max) && (ch == SPACE)) {
	234	spk_out(PROCSPEECH);
	235	spk_lock(flags);
	236	delay_time_val = delay_time->u.n.value;
	237	jiffy_delta_val = jiffy_delta->u.n.value;
	238	spk_unlock(flags);
	239	schedule_timeout(msecs_to_jiffies(delay_time_val));
	240	jiff_max = jiffies + jiffy_delta_val;
	241	}
	242	}
	243	spk_out(PROCSPEECH);
	244	}
	245
	246	static const char synth_immediate(struct spk_synth synth, const char *buf)
	247	{
	248	u_char ch;
	249	while ((ch = (u_char)*buf)) {
	250	if (synth_full())
	251	return buf;
	252	if (ch == '\n')
	253	ch = PROCSPEECH;
	254	spk_out(ch);
	255	buf++;
	256	}
	257	return 0;
	258	}
	259
	260	static void synth_flush(struct spk_synth *synth)
	261	{
	262	outb_p(SYNTH_CLEAR, speakup_info.port_tts);
2c9e0cb0	263	while (synth_writable())
c6e3fd22 WH	264	cpu_relax();
	265	}
	266
	267	static char synth_read_tts(void)
	268	{
	269	u_char ch;
2c9e0cb0	270	while (!synth_readable())
c6e3fd22 WH	271	cpu_relax();
	272	ch = synth_status & 0x7f;
	273	outb_p(ch, speakup_info.port_tts);
2c9e0cb0	274	while (synth_readable())
c6e3fd22 WH	275	cpu_relax();
	276	return (char) ch;
	277	}
	278
	279	/* interrogate the DoubleTalk PC and return its settings */
	280	static struct synth_settings synth_interrogate(struct spk_synth synth)
	281	{
	282	u_char *t;
	283	static char buf[sizeof(struct synth_settings) + 1];
	284	int total, i;
	285	static struct synth_settings status;
	286	synth_immediate(synth, "\x18\x01?");
	287	for (total = 0, i = 0; i < 50; i++) {
	288	buf[total] = synth_read_tts();
	289	if (total > 2 && buf[total] == 0x7f)
	290	break;
	291	if (total < sizeof(struct synth_settings))
	292	total++;
	293	}
	294	t = buf;
	295	/* serial number is little endian */
	296	status.serial_number = t[0] + t[1]*256;
	297	t += 2;
	298	for (i = 0; *t != '\r'; t++) {
	299	status.rom_version[i] = *t;
	300	if (i < sizeof(status.rom_version)-1)
	301	i++;
	302	}
	303	status.rom_version[i] = 0;
	304	t++;
	305	status.mode = *t++;
	306	status.punc_level = *t++;
	307	status.formant_freq = *t++;
	308	status.pitch = *t++;
	309	status.speed = *t++;
	310	status.volume = *t++;
	311	status.tone = *t++;
	312	status.expression = *t++;
	313	status.ext_dict_loaded = *t++;
	314	status.ext_dict_status = *t++;
	315	status.free_ram = *t++;
	316	status.articulation = *t++;
	317	status.reverb = *t++;
	318	status.eob = *t++;
	319	return &status;
	320	}
	321
	322	static int synth_probe(struct spk_synth *synth)
	323	{
	324	unsigned int port_val = 0;
	325	int i = 0;
	326	struct synth_settings *sp;
	327	pr_info("Probing for DoubleTalk.\n");
	328	if (port_forced) {
	329	speakup_info.port_tts = port_forced;
	330	pr_info("probe forced to %x by kernel command line\n",
	331	speakup_info.port_tts);
	332	if ((port_forced & 0xf) != 0xf)
	333	pr_info("warning: port base should probably end with f\n");
	334	if (synth_request_region(speakup_info.port_tts-1,
	335	SYNTH_IO_EXTENT)) {
	336	pr_warn("sorry, port already reserved\n");
	337	return -EBUSY;
	338	}
339	port_val = inw(speakup_info.port_tts-1);
340	synth_lpc = speakup_info.port_tts-1;
341	} else {
342	for (i = 0; synth_portlist[i]; i++) {
343	if (synth_request_region(synth_portlist[i],
344	SYNTH_IO_EXTENT))
345	continue;
346	port_val = inw(synth_portlist[i]) & 0xfbff;
347	if (port_val == 0x107f) {
348	synth_lpc = synth_portlist[i];
349	speakup_info.port_tts = synth_lpc+1;
350	break;
351	}
352	synth_release_region(synth_portlist[i],
353	SYNTH_IO_EXTENT);
354	}
355	}
356	port_val &= 0xfbff;
357	if (port_val != 0x107f) {
358	pr_info("DoubleTalk PC: not found\n");
359	synth_release_region(synth_lpc, SYNTH_IO_EXTENT);
360	return -ENODEV;
361	}
362	while (inw_p(synth_lpc) != 0x147f)
363	cpu_relax(); /* wait until it's ready */
364	sp = synth_interrogate(synth);
365	pr_info("%s: %03x-%03x, ROM ver %s, s/n %u, driver: %s\n",
366	synth->long_name, synth_lpc, synth_lpc+SYNTH_IO_EXTENT - 1,
367	sp->rom_version, sp->serial_number, synth->version);
368	synth->alive = 1;
369	return 0;
370	}
371
372	static void dtlk_release(void)
373	{
374	if (speakup_info.port_tts)
375	synth_release_region(speakup_info.port_tts-1, SYNTH_IO_EXTENT);
376	speakup_info.port_tts = 0;
377	}
378
379	module_param_named(port, port_forced, int, S_IRUGO);
380	module_param_named(start, synth_dtlk.startup, short, S_IRUGO);
381
382	MODULE_PARM_DESC(port, "Set the port for the synthesizer (override probing).");
383	MODULE_PARM_DESC(start, "Start the synthesizer once it is loaded.");
384
385	static int __init dtlk_init(void)
386	{
387	return synth_add(&synth_dtlk);
388	}
389
390	static void __exit dtlk_exit(void)
391	{
392	synth_remove(&synth_dtlk);
393	}
394
395	module_init(dtlk_init);
396	module_exit(dtlk_exit);
397	MODULE_AUTHOR("Kirk Reiser <kirk@braille.uwo.ca>");
398	MODULE_AUTHOR("David Borowski");
399	MODULE_DESCRIPTION("Speakup support for DoubleTalk PC synthesizers");
400	MODULE_LICENSE("GPL");
401	MODULE_VERSION(DRV_VERSION);
402