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author | William Hubbs <w.d.hubbs@gmail.com> | 2010-10-07 18:20:02 (GMT) |
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committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-10-08 02:22:31 (GMT) |
commit | c6e3fd22cd538365bfeb82997d5b89562e077d42 (patch) | |
tree | 5eaa170c9003abc7b24ab340ccabe889cba47992 /drivers/staging/speakup/speakup_decpc.c | |
parent | e59fe083f683ca2ca56abefad290d110808a6fb5 (diff) | |
download | linux-fsl-qoriq-c6e3fd22cd538365bfeb82997d5b89562e077d42.tar.xz |
Staging: add speakup to the staging directory
Speakup is a kernel based screen review package for the linux operating
system. It allows blind users to interact with applications on the
linux console by means of synthetic speech.
The authors and maintainers of this code include the following:
Kirk Reiser, Andy Berdan, John Covici, Brian and
David Borowski, Christopher Brannon, Samuel Thibault and William Hubbs.
Signed-off-by: William Hubbs <w.d.hubbs@gmail.com>
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging/speakup/speakup_decpc.c')
-rw-r--r-- | drivers/staging/speakup/speakup_decpc.c | 503 |
1 files changed, 503 insertions, 0 deletions
diff --git a/drivers/staging/speakup/speakup_decpc.c b/drivers/staging/speakup/speakup_decpc.c new file mode 100644 index 0000000..490b758 --- /dev/null +++ b/drivers/staging/speakup/speakup_decpc.c @@ -0,0 +1,503 @@ +/* + * This is the DECtalk PC speakup driver + * + * Some constants from DEC's DOS driver: + * Copyright (c) by Digital Equipment Corp. + * + * 386BSD DECtalk PC driver: + * Copyright (c) 1996 Brian Buhrow <buhrow@lothlorien.nfbcal.org> + * + * Linux DECtalk PC driver: + * Copyright (c) 1997 Nicolas Pitre <nico@cam.org> + * + * speakup DECtalk PC Internal driver: + * Copyright (c) 2003 David Borowski <david575@golden.net> + * + * All rights reserved. + * + * 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., 675 Mass Ave, Cambridge, MA 02139, USA. + */ +#include <linux/jiffies.h> +#include <linux/sched.h> +#include <linux/timer.h> +#include <linux/kthread.h> + +#include "spk_priv.h" +#include "speakup.h" + +#define MODULE_init 0x0dec /* module in boot code */ +#define MODULE_self_test 0x8800 /* module in self-test */ +#define MODULE_reset 0xffff /* reinit the whole module */ + +#define MODE_mask 0xf000 /* mode bits in high nibble */ +#define MODE_null 0x0000 +#define MODE_test 0x2000 /* in testing mode */ +#define MODE_status 0x8000 +#define STAT_int 0x0001 /* running in interrupt mode */ +#define STAT_tr_char 0x0002 /* character data to transmit */ +#define STAT_rr_char 0x0004 /* ready to receive char data */ +#define STAT_cmd_ready 0x0008 /* ready to accept commands */ +#define STAT_dma_ready 0x0010 /* dma command ready */ +#define STAT_digitized 0x0020 /* spc in digitized mode */ +#define STAT_new_index 0x0040 /* new last index ready */ +#define STAT_new_status 0x0080 /* new status posted */ +#define STAT_dma_state 0x0100 /* dma state toggle */ +#define STAT_index_valid 0x0200 /* indexs are valid */ +#define STAT_flushing 0x0400 /* flush in progress */ +#define STAT_self_test 0x0800 /* module in self test */ +#define MODE_ready 0xc000 /* module ready for next phase */ +#define READY_boot 0x0000 +#define READY_kernel 0x0001 +#define MODE_error 0xf000 + +#define CMD_mask 0xf000 /* mask for command nibble */ +#define CMD_null 0x0000 /* post status */ +#define CMD_control 0x1000 /* hard control command */ +#define CTRL_mask 0x0F00 /* mask off control nibble */ +#define CTRL_data 0x00FF /* madk to get data byte */ +#define CTRL_null 0x0000 /* null control */ +#define CTRL_vol_up 0x0100 /* increase volume */ +#define CTRL_vol_down 0x0200 /* decrease volume */ +#define CTRL_vol_set 0x0300 /* set volume */ +#define CTRL_pause 0x0400 /* pause spc */ +#define CTRL_resume 0x0500 /* resume spc clock */ +#define CTRL_resume_spc 0x0001 /* resume spc soft pause */ +#define CTRL_flush 0x0600 /* flush all buffers */ +#define CTRL_int_enable 0x0700 /* enable status change ints */ +#define CTRL_buff_free 0x0800 /* buffer remain count */ +#define CTRL_buff_used 0x0900 /* buffer in use */ +#define CTRL_speech 0x0a00 /* immediate speech change */ +#define CTRL_SP_voice 0x0001 /* voice change */ +#define CTRL_SP_rate 0x0002 /* rate change */ +#define CTRL_SP_comma 0x0003 /* comma pause change */ +#define CTRL_SP_period 0x0004 /* period pause change */ +#define CTRL_SP_rate_delta 0x0005 /* delta rate change */ +#define CTRL_SP_get_param 0x0006 /* return the desired parameter */ +#define CTRL_last_index 0x0b00 /* get last index spoken */ +#define CTRL_io_priority 0x0c00 /* change i/o priority */ +#define CTRL_free_mem 0x0d00 /* get free paragraphs on module */ +#define CTRL_get_lang 0x0e00 /* return bit mask of loaded + * languages */ +#define CMD_test 0x2000 /* self-test request */ +#define TEST_mask 0x0F00 /* isolate test field */ +#define TEST_null 0x0000 /* no test requested */ +#define TEST_isa_int 0x0100 /* assert isa irq */ +#define TEST_echo 0x0200 /* make data in == data out */ +#define TEST_seg 0x0300 /* set peek/poke segment */ +#define TEST_off 0x0400 /* set peek/poke offset */ +#define TEST_peek 0x0500 /* data out == *peek */ +#define TEST_poke 0x0600 /* *peek == data in */ +#define TEST_sub_code 0x00FF /* user defined test sub codes */ +#define CMD_id 0x3000 /* return software id */ +#define ID_null 0x0000 /* null id */ +#define ID_kernel 0x0100 /* kernel code executing */ +#define ID_boot 0x0200 /* boot code executing */ +#define CMD_dma 0x4000 /* force a dma start */ +#define CMD_reset 0x5000 /* reset module status */ +#define CMD_sync 0x6000 /* kernel sync command */ +#define CMD_char_in 0x7000 /* single character send */ +#define CMD_char_out 0x8000 /* single character get */ +#define CHAR_count_1 0x0100 /* one char in cmd_low */ +#define CHAR_count_2 0x0200 /* the second in data_low */ +#define CHAR_count_3 0x0300 /* the third in data_high */ +#define CMD_spc_mode 0x9000 /* change spc mode */ +#define CMD_spc_to_text 0x0100 /* set to text mode */ +#define CMD_spc_to_digit 0x0200 /* set to digital mode */ +#define CMD_spc_rate 0x0400 /* change spc data rate */ +#define CMD_error 0xf000 /* severe error */ + +enum { PRIMARY_DIC = 0, USER_DIC, COMMAND_DIC, ABBREV_DIC }; + +#define DMA_single_in 0x01 +#define DMA_single_out 0x02 +#define DMA_buff_in 0x03 +#define DMA_buff_out 0x04 +#define DMA_control 0x05 +#define DT_MEM_ALLOC 0x03 +#define DT_SET_DIC 0x04 +#define DT_START_TASK 0x05 +#define DT_LOAD_MEM 0x06 +#define DT_READ_MEM 0x07 +#define DT_DIGITAL_IN 0x08 +#define DMA_sync 0x06 +#define DMA_sync_char 0x07 + +#define DRV_VERSION "2.12" +#define PROCSPEECH 0x0b +#define SYNTH_IO_EXTENT 8 + +static int synth_probe(struct spk_synth *synth); +static void dtpc_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_portlist[] = { 0x340, 0x350, 0x240, 0x250, 0 }; +static int in_escape, is_flushing; +static int dt_stat, dma_state; + +static struct var_t vars[] = { + { CAPS_START, .u.s = {"[:dv ap 200]" }}, + { CAPS_STOP, .u.s = {"[:dv ap 100]" }}, + { RATE, .u.n = {"[:ra %d]", 9, 0, 18, 150, 25, NULL }}, + { PITCH, .u.n = {"[:dv ap %d]", 80, 0, 100, 20, 0, NULL }}, + { VOL, .u.n = {"[:vo se %d]", 5, 0, 9, 5, 10, NULL }}, + { PUNCT, .u.n = {"[:pu %c]", 0, 0, 2, 0, 0, "nsa" }}, + { VOICE, .u.n = {"[:n%c]", 0, 0, 9, 0, 0, "phfdburwkv" }}, + { DIRECT, .u.n = {NULL, 0, 0, 1, 0, 0, NULL }}, + V_LAST_VAR +}; + +/* + * These attributes will appear in /sys/accessibility/speakup/decpc. + */ +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 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 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, + &pitch_attribute.attr, + &punct_attribute.attr, + &rate_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_dec_pc = { + .name = "decpc", + .version = DRV_VERSION, + .long_name = "Dectalk PC", + .init = "[:pe -380]", + .procspeech = PROCSPEECH, + .delay = 500, + .trigger = 50, + .jiffies = 50, + .full = 1000, + .flags = SF_DEC, + .startup = SYNTH_START, + .checkval = SYNTH_CHECK, + .vars = vars, + .probe = synth_probe, + .release = dtpc_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 = NULL, + .indexing = { + .command = NULL, + .lowindex = 0, + .highindex = 0, + .currindex = 0, + }, + .attributes = { + .attrs = synth_attrs, + .name = "decpc", + }, +}; + +static int dt_getstatus(void) +{ + dt_stat = inb_p(speakup_info.port_tts) | + (inb_p(speakup_info.port_tts + 1) << 8); + return dt_stat; +} + +static void dt_sendcmd(u_int cmd) +{ + outb_p(cmd & 0xFF, speakup_info.port_tts); + outb_p((cmd >> 8) & 0xFF, speakup_info.port_tts+1); +} + +static int dt_waitbit(int bit) +{ + int timeout = 100; + while (--timeout > 0) { + if ((dt_getstatus() & bit) == bit) + return 1; + udelay(50); + } + return 0; +} + +static int dt_wait_dma(void) +{ + int timeout = 100, state = dma_state; + if (!dt_waitbit(STAT_dma_ready)) + return 0; + while (--timeout > 0) { + if ((dt_getstatus()&STAT_dma_state) == state) + return 1; + udelay(50); + } + dma_state = dt_getstatus() & STAT_dma_state; + return 1; +} + +static int dt_ctrl(u_int cmd) +{ + int timeout = 10; + if (!dt_waitbit(STAT_cmd_ready)) + return -1; + outb_p(0, speakup_info.port_tts+2); + outb_p(0, speakup_info.port_tts+3); + dt_getstatus(); + dt_sendcmd(CMD_control|cmd); + outb_p(0, speakup_info.port_tts+6); + while (dt_getstatus() & STAT_cmd_ready) { + udelay(20); + if (--timeout == 0) + break; + } + dt_sendcmd(CMD_null); + return 0; +} + +static void synth_flush(struct spk_synth *synth) +{ + int timeout = 10; + if (is_flushing) + return; + is_flushing = 4; + in_escape = 0; + while (dt_ctrl(CTRL_flush)) { + if (--timeout == 0) + break; +udelay(50); + } + for (timeout = 0; timeout < 10; timeout++) { + if (dt_waitbit(STAT_dma_ready)) + break; +udelay(50); + } + outb_p(DMA_sync, speakup_info.port_tts+4); + outb_p(0, speakup_info.port_tts+4); + udelay(100); + for (timeout = 0; timeout < 10; timeout++) { + if (!(dt_getstatus() & STAT_flushing)) + break; +udelay(50); + } + dma_state = dt_getstatus() & STAT_dma_state; + dma_state ^= STAT_dma_state; + is_flushing = 0; +} + +static int dt_sendchar(char ch) +{ + if (!dt_wait_dma()) + return -1; + if (!(dt_stat & STAT_rr_char)) + return -2; + outb_p(DMA_single_in, speakup_info.port_tts+4); + outb_p(ch, speakup_info.port_tts+4); + dma_state ^= STAT_dma_state; + return 0; +} + +static int testkernel(void) +{ + int status = 0; + if (dt_getstatus() == 0xffff) { + status = -1; + goto oops; + } + dt_sendcmd(CMD_sync); + if (!dt_waitbit(STAT_cmd_ready)) + status = -2; + else if (dt_stat&0x8000) + return 0; + else if (dt_stat == 0x0dec) + pr_warn("dec_pc at 0x%x, software not loaded\n", + speakup_info.port_tts); + status = -3; +oops: synth_release_region(speakup_info.port_tts, SYNTH_IO_EXTENT); + speakup_info.port_tts = 0; + return status; +} + +static void do_catch_up(struct spk_synth *synth) +{ + u_char ch; + static u_char last = '\0'; + 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 = get_var(JIFFY); + delay_time = 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; + } + ch = synth_buffer_peek(); + set_current_state(TASK_INTERRUPTIBLE); + delay_time_val = delay_time->u.n.value; + spk_unlock(flags); + if (ch == '\n') + ch = 0x0D; + if (dt_sendchar(ch)) { + schedule_timeout(msecs_to_jiffies(delay_time_val)); + continue; + } + set_current_state(TASK_RUNNING); + spk_lock(flags); + synth_buffer_getc(); + spk_unlock(flags); + if (ch == '[') + in_escape = 1; + else if (ch == ']') + in_escape = 0; + else if (ch <= SPACE) { + if (!in_escape && strchr(",.!?;:", last)) + dt_sendchar(PROCSPEECH); + if (jiffies >= jiff_max) { + if (!in_escape) + dt_sendchar(PROCSPEECH); + spk_lock(flags); + jiffy_delta_val = jiffy_delta->u.n.value; + delay_time_val = delay_time->u.n.value; + spk_unlock(flags); + schedule_timeout(msecs_to_jiffies(delay_time_val)); + jiff_max = jiffies + jiffy_delta_val; + } + } + last = ch; + ch = 0; + } + if (!in_escape) + dt_sendchar(PROCSPEECH); +} + +static const char *synth_immediate(struct spk_synth *synth, const char *buf) +{ + u_char ch; + while ((ch = *buf)) { + if (ch == '\n') + ch = PROCSPEECH; + if (dt_sendchar(ch)) + return buf; + buf++; + } + return 0; +} + +static int synth_probe(struct spk_synth *synth) +{ + int i = 0, failed = 0; + pr_info("Probing for %s.\n", synth->long_name); + for (i = 0; synth_portlist[i]; i++) { + if (synth_request_region(synth_portlist[i], SYNTH_IO_EXTENT)) { + pr_warn("request_region: failed with 0x%x, %d\n", + synth_portlist[i], SYNTH_IO_EXTENT); + continue; + } + speakup_info.port_tts = synth_portlist[i]; + failed = testkernel(); + if (failed == 0) + break; + } + if (failed) { + pr_info("%s: not found\n", synth->long_name); + return -ENODEV; + } + pr_info("%s: %03x-%03x, Driver Version %s,\n", synth->long_name, + speakup_info.port_tts, speakup_info.port_tts + 7, + synth->version); + synth->alive = 1; + return 0; +} + +static void dtpc_release(void) +{ + if (speakup_info.port_tts) + synth_release_region(speakup_info.port_tts, SYNTH_IO_EXTENT); + speakup_info.port_tts = 0; +} + +module_param_named(start, synth_dec_pc.startup, short, S_IRUGO); + +MODULE_PARM_DESC(start, "Start the synthesizer once it is loaded."); + +static int __init decpc_init(void) +{ + return synth_add(&synth_dec_pc); +} + +static void __exit decpc_exit(void) +{ + synth_remove(&synth_dec_pc); +} + +module_init(decpc_init); +module_exit(decpc_exit); +MODULE_AUTHOR("Kirk Reiser <kirk@braille.uwo.ca>"); +MODULE_AUTHOR("David Borowski"); +MODULE_DESCRIPTION("Speakup support for DECtalk PC synthesizers"); +MODULE_LICENSE("GPL"); +MODULE_VERSION(DRV_VERSION); + |