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493 lines
12 KiB
493 lines
12 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <linux/types.h> |
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#include <linux/ctype.h> /* for isdigit() and friends */ |
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#include <linux/fs.h> |
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#include <linux/mm.h> /* for verify_area */ |
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#include <linux/errno.h> /* for -EBUSY */ |
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#include <linux/ioport.h> /* for check_region, request_region */ |
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#include <linux/interrupt.h> |
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#include <linux/delay.h> /* for loops_per_sec */ |
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#include <linux/kmod.h> |
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#include <linux/jiffies.h> |
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#include <linux/uaccess.h> /* for copy_from_user */ |
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#include <linux/sched.h> |
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#include <linux/timer.h> |
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#include <linux/kthread.h> |
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#include "spk_priv.h" |
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#include "speakup.h" |
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#include "serialio.h" |
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static LIST_HEAD(synths); |
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struct spk_synth *synth; |
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char spk_pitch_buff[32] = ""; |
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static int module_status; |
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bool spk_quiet_boot; |
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struct speakup_info_t speakup_info = { |
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/* |
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* This spinlock is used to protect the entire speakup machinery, and |
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* must be taken at each kernel->speakup transition and released at |
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* each corresponding speakup->kernel transition. |
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* |
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* The progression thread only interferes with the speakup machinery |
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* through the synth buffer, so only needs to take the lock |
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* while tinkering with the buffer. |
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* |
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* We use spin_lock/trylock_irqsave and spin_unlock_irqrestore with this |
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* spinlock because speakup needs to disable the keyboard IRQ. |
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*/ |
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.spinlock = __SPIN_LOCK_UNLOCKED(speakup_info.spinlock), |
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.flushing = 0, |
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}; |
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EXPORT_SYMBOL_GPL(speakup_info); |
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static int do_synth_init(struct spk_synth *in_synth); |
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/* |
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* Main loop of the progression thread: keep eating from the buffer |
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* and push to the serial port, waiting as needed |
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* |
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* For devices that have a "full" notification mechanism, the driver can |
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* adapt the loop the way they prefer. |
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*/ |
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static void _spk_do_catch_up(struct spk_synth *synth, int unicode) |
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{ |
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u16 ch; |
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unsigned long flags; |
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unsigned long jiff_max; |
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struct var_t *delay_time; |
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struct var_t *full_time; |
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struct var_t *jiffy_delta; |
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int jiffy_delta_val; |
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int delay_time_val; |
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int full_time_val; |
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int ret; |
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jiffy_delta = spk_get_var(JIFFY); |
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full_time = spk_get_var(FULL); |
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delay_time = spk_get_var(DELAY); |
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spin_lock_irqsave(&speakup_info.spinlock, flags); |
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jiffy_delta_val = jiffy_delta->u.n.value; |
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spin_unlock_irqrestore(&speakup_info.spinlock, flags); |
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jiff_max = jiffies + jiffy_delta_val; |
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while (!kthread_should_stop()) { |
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spin_lock_irqsave(&speakup_info.spinlock, flags); |
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if (speakup_info.flushing) { |
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speakup_info.flushing = 0; |
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spin_unlock_irqrestore(&speakup_info.spinlock, flags); |
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synth->flush(synth); |
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continue; |
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} |
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if (!unicode) |
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synth_buffer_skip_nonlatin1(); |
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if (synth_buffer_empty()) { |
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spin_unlock_irqrestore(&speakup_info.spinlock, flags); |
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break; |
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} |
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ch = synth_buffer_peek(); |
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set_current_state(TASK_INTERRUPTIBLE); |
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full_time_val = full_time->u.n.value; |
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spin_unlock_irqrestore(&speakup_info.spinlock, flags); |
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if (ch == '\n') |
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ch = synth->procspeech; |
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if (unicode) |
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ret = synth->io_ops->synth_out_unicode(synth, ch); |
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else |
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ret = synth->io_ops->synth_out(synth, ch); |
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if (!ret) { |
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schedule_timeout(msecs_to_jiffies(full_time_val)); |
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continue; |
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} |
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if (time_after_eq(jiffies, jiff_max) && (ch == SPACE)) { |
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spin_lock_irqsave(&speakup_info.spinlock, flags); |
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jiffy_delta_val = jiffy_delta->u.n.value; |
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delay_time_val = delay_time->u.n.value; |
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full_time_val = full_time->u.n.value; |
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spin_unlock_irqrestore(&speakup_info.spinlock, flags); |
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if (synth->io_ops->synth_out(synth, synth->procspeech)) |
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schedule_timeout( |
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msecs_to_jiffies(delay_time_val)); |
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else |
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schedule_timeout( |
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msecs_to_jiffies(full_time_val)); |
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jiff_max = jiffies + jiffy_delta_val; |
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} |
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set_current_state(TASK_RUNNING); |
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spin_lock_irqsave(&speakup_info.spinlock, flags); |
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synth_buffer_getc(); |
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spin_unlock_irqrestore(&speakup_info.spinlock, flags); |
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} |
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synth->io_ops->synth_out(synth, synth->procspeech); |
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} |
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void spk_do_catch_up(struct spk_synth *synth) |
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{ |
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_spk_do_catch_up(synth, 0); |
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} |
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EXPORT_SYMBOL_GPL(spk_do_catch_up); |
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void spk_do_catch_up_unicode(struct spk_synth *synth) |
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{ |
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_spk_do_catch_up(synth, 1); |
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} |
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EXPORT_SYMBOL_GPL(spk_do_catch_up_unicode); |
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void spk_synth_flush(struct spk_synth *synth) |
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{ |
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synth->io_ops->flush_buffer(synth); |
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synth->io_ops->synth_out(synth, synth->clear); |
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} |
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EXPORT_SYMBOL_GPL(spk_synth_flush); |
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unsigned char spk_synth_get_index(struct spk_synth *synth) |
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{ |
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return synth->io_ops->synth_in_nowait(synth); |
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} |
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EXPORT_SYMBOL_GPL(spk_synth_get_index); |
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int spk_synth_is_alive_nop(struct spk_synth *synth) |
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{ |
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synth->alive = 1; |
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return 1; |
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} |
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EXPORT_SYMBOL_GPL(spk_synth_is_alive_nop); |
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int spk_synth_is_alive_restart(struct spk_synth *synth) |
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{ |
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if (synth->alive) |
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return 1; |
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if (synth->io_ops->wait_for_xmitr(synth) > 0) { |
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/* restart */ |
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synth->alive = 1; |
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synth_printf("%s", synth->init); |
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return 2; /* reenabled */ |
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} |
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pr_warn("%s: can't restart synth\n", synth->long_name); |
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return 0; |
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} |
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EXPORT_SYMBOL_GPL(spk_synth_is_alive_restart); |
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static void thread_wake_up(struct timer_list *unused) |
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{ |
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wake_up_interruptible_all(&speakup_event); |
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} |
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static DEFINE_TIMER(thread_timer, thread_wake_up); |
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void synth_start(void) |
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{ |
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struct var_t *trigger_time; |
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if (!synth->alive) { |
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synth_buffer_clear(); |
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return; |
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} |
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trigger_time = spk_get_var(TRIGGER); |
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if (!timer_pending(&thread_timer)) |
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mod_timer(&thread_timer, jiffies + |
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msecs_to_jiffies(trigger_time->u.n.value)); |
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} |
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void spk_do_flush(void) |
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{ |
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if (!synth) |
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return; |
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speakup_info.flushing = 1; |
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synth_buffer_clear(); |
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if (synth->alive) { |
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if (spk_pitch_shift) { |
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synth_printf("%s", spk_pitch_buff); |
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spk_pitch_shift = 0; |
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} |
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} |
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wake_up_interruptible_all(&speakup_event); |
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wake_up_process(speakup_task); |
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} |
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void synth_write(const char *buf, size_t count) |
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{ |
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while (count--) |
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synth_buffer_add(*buf++); |
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synth_start(); |
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} |
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void synth_printf(const char *fmt, ...) |
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{ |
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va_list args; |
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unsigned char buf[160], *p; |
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int r; |
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va_start(args, fmt); |
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r = vsnprintf(buf, sizeof(buf), fmt, args); |
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va_end(args); |
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if (r > sizeof(buf) - 1) |
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r = sizeof(buf) - 1; |
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p = buf; |
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while (r--) |
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synth_buffer_add(*p++); |
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synth_start(); |
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} |
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EXPORT_SYMBOL_GPL(synth_printf); |
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void synth_putwc(u16 wc) |
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{ |
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synth_buffer_add(wc); |
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} |
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EXPORT_SYMBOL_GPL(synth_putwc); |
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void synth_putwc_s(u16 wc) |
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{ |
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synth_buffer_add(wc); |
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synth_start(); |
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} |
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EXPORT_SYMBOL_GPL(synth_putwc_s); |
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void synth_putws(const u16 *buf) |
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{ |
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const u16 *p; |
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for (p = buf; *p; p++) |
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synth_buffer_add(*p); |
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} |
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EXPORT_SYMBOL_GPL(synth_putws); |
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void synth_putws_s(const u16 *buf) |
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{ |
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synth_putws(buf); |
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synth_start(); |
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} |
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EXPORT_SYMBOL_GPL(synth_putws_s); |
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static int index_count; |
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static int sentence_count; |
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void spk_reset_index_count(int sc) |
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{ |
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static int first = 1; |
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if (first) |
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first = 0; |
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else |
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synth->get_index(synth); |
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index_count = 0; |
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sentence_count = sc; |
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} |
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int synth_supports_indexing(void) |
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{ |
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if (synth->get_index) |
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return 1; |
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return 0; |
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} |
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void synth_insert_next_index(int sent_num) |
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{ |
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int out; |
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if (synth->alive) { |
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if (sent_num == 0) { |
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synth->indexing.currindex++; |
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index_count++; |
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if (synth->indexing.currindex > |
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synth->indexing.highindex) |
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synth->indexing.currindex = |
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synth->indexing.lowindex; |
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} |
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out = synth->indexing.currindex * 10 + sent_num; |
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synth_printf(synth->indexing.command, out, out); |
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} |
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} |
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void spk_get_index_count(int *linecount, int *sentcount) |
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{ |
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int ind = synth->get_index(synth); |
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if (ind) { |
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sentence_count = ind % 10; |
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if ((ind / 10) <= synth->indexing.currindex) |
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index_count = synth->indexing.currindex - (ind / 10); |
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else |
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index_count = synth->indexing.currindex |
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- synth->indexing.lowindex |
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+ synth->indexing.highindex - (ind / 10) + 1; |
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} |
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*sentcount = sentence_count; |
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*linecount = index_count; |
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} |
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static struct resource synth_res; |
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int synth_request_region(unsigned long start, unsigned long n) |
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{ |
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struct resource *parent = &ioport_resource; |
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memset(&synth_res, 0, sizeof(synth_res)); |
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synth_res.name = synth->name; |
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synth_res.start = start; |
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synth_res.end = start + n - 1; |
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synth_res.flags = IORESOURCE_BUSY; |
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return request_resource(parent, &synth_res); |
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} |
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EXPORT_SYMBOL_GPL(synth_request_region); |
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int synth_release_region(unsigned long start, unsigned long n) |
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{ |
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return release_resource(&synth_res); |
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} |
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EXPORT_SYMBOL_GPL(synth_release_region); |
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struct var_t synth_time_vars[] = { |
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{ DELAY, .u.n = {NULL, 100, 100, 2000, 0, 0, NULL } }, |
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{ TRIGGER, .u.n = {NULL, 20, 10, 2000, 0, 0, NULL } }, |
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{ JIFFY, .u.n = {NULL, 50, 20, 200, 0, 0, NULL } }, |
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{ FULL, .u.n = {NULL, 400, 200, 60000, 0, 0, NULL } }, |
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{ FLUSH, .u.n = {NULL, 4000, 100, 4000, 0, 0, NULL } }, |
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V_LAST_VAR |
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}; |
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/* called by: speakup_init() */ |
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int synth_init(char *synth_name) |
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{ |
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int ret = 0; |
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struct spk_synth *tmp, *synth = NULL; |
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if (!synth_name) |
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return 0; |
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if (strcmp(synth_name, "none") == 0) { |
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mutex_lock(&spk_mutex); |
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synth_release(); |
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mutex_unlock(&spk_mutex); |
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return 0; |
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} |
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mutex_lock(&spk_mutex); |
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/* First, check if we already have it loaded. */ |
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list_for_each_entry(tmp, &synths, node) { |
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if (strcmp(tmp->name, synth_name) == 0) |
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synth = tmp; |
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} |
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/* If we got one, initialize it now. */ |
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if (synth) |
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ret = do_synth_init(synth); |
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else |
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ret = -ENODEV; |
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mutex_unlock(&spk_mutex); |
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return ret; |
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} |
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/* called by: synth_add() */ |
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static int do_synth_init(struct spk_synth *in_synth) |
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{ |
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struct var_t *var; |
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synth_release(); |
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if (in_synth->checkval != SYNTH_CHECK) |
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return -EINVAL; |
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synth = in_synth; |
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synth->alive = 0; |
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pr_warn("synth probe\n"); |
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if (synth->probe(synth) < 0) { |
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pr_warn("%s: device probe failed\n", in_synth->name); |
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synth = NULL; |
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return -ENODEV; |
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} |
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synth_time_vars[0].u.n.value = |
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synth_time_vars[0].u.n.default_val = synth->delay; |
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synth_time_vars[1].u.n.value = |
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synth_time_vars[1].u.n.default_val = synth->trigger; |
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synth_time_vars[2].u.n.value = |
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synth_time_vars[2].u.n.default_val = synth->jiffies; |
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synth_time_vars[3].u.n.value = |
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synth_time_vars[3].u.n.default_val = synth->full; |
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synth_time_vars[4].u.n.value = |
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synth_time_vars[4].u.n.default_val = synth->flush_time; |
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synth_printf("%s", synth->init); |
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for (var = synth->vars; |
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(var->var_id >= 0) && (var->var_id < MAXVARS); var++) |
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speakup_register_var(var); |
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if (!spk_quiet_boot) |
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synth_printf("%s found\n", synth->long_name); |
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if (synth->attributes.name && |
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sysfs_create_group(speakup_kobj, &synth->attributes) < 0) |
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return -ENOMEM; |
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synth_flags = synth->flags; |
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wake_up_interruptible_all(&speakup_event); |
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if (speakup_task) |
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wake_up_process(speakup_task); |
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return 0; |
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} |
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void synth_release(void) |
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{ |
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struct var_t *var; |
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unsigned long flags; |
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if (!synth) |
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return; |
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spin_lock_irqsave(&speakup_info.spinlock, flags); |
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pr_info("releasing synth %s\n", synth->name); |
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synth->alive = 0; |
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del_timer(&thread_timer); |
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spin_unlock_irqrestore(&speakup_info.spinlock, flags); |
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if (synth->attributes.name) |
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sysfs_remove_group(speakup_kobj, &synth->attributes); |
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for (var = synth->vars; var->var_id != MAXVARS; var++) |
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speakup_unregister_var(var->var_id); |
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synth->release(synth); |
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synth = NULL; |
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} |
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/* called by: all_driver_init() */ |
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int synth_add(struct spk_synth *in_synth) |
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{ |
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int status = 0; |
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struct spk_synth *tmp; |
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mutex_lock(&spk_mutex); |
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list_for_each_entry(tmp, &synths, node) { |
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if (tmp == in_synth) { |
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mutex_unlock(&spk_mutex); |
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return 0; |
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} |
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} |
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if (in_synth->startup) |
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status = do_synth_init(in_synth); |
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if (!status) |
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list_add_tail(&in_synth->node, &synths); |
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mutex_unlock(&spk_mutex); |
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return status; |
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} |
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EXPORT_SYMBOL_GPL(synth_add); |
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void synth_remove(struct spk_synth *in_synth) |
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{ |
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mutex_lock(&spk_mutex); |
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if (synth == in_synth) |
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synth_release(); |
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list_del(&in_synth->node); |
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module_status = 0; |
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mutex_unlock(&spk_mutex); |
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} |
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EXPORT_SYMBOL_GPL(synth_remove); |
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struct spk_synth *synth_current(void) |
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{ |
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return synth; |
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} |
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EXPORT_SYMBOL_GPL(synth_current); |
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short spk_punc_masks[] = { 0, SOME, MOST, PUNC, PUNC | B_SYM };
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