diff options
Diffstat (limited to 'drivers/accessibility/speakup/devsynth.c')
| -rw-r--r-- | drivers/accessibility/speakup/devsynth.c | 116 |
1 files changed, 101 insertions, 15 deletions
diff --git a/drivers/accessibility/speakup/devsynth.c b/drivers/accessibility/speakup/devsynth.c index d30571663585..e3d909bd0480 100644 --- a/drivers/accessibility/speakup/devsynth.c +++ b/drivers/accessibility/speakup/devsynth.c @@ -7,9 +7,10 @@ #include "speakup.h" #include "spk_priv.h" -static int misc_registered; +static int synth_registered, synthu_registered; static int dev_opened; +/* Latin1 version */ static ssize_t speakup_file_write(struct file *fp, const char __user *buffer, size_t nbytes, loff_t *ppos) { @@ -34,6 +35,65 @@ static ssize_t speakup_file_write(struct file *fp, const char __user *buffer, return (ssize_t)nbytes; } +/* UTF-8 version */ +static ssize_t speakup_file_writeu(struct file *fp, const char __user *buffer, + size_t nbytes, loff_t *ppos) +{ + size_t count = nbytes, consumed, want; + const char __user *ptr = buffer; + size_t bytes; + unsigned long flags; + unsigned char buf[256]; + u16 ubuf[256]; + size_t in, out; + + if (!synth) + return -ENODEV; + + want = 1; + while (count >= want) { + /* Copy some UTF-8 piece from userland */ + bytes = min(count, sizeof(buf)); + if (copy_from_user(buf, ptr, bytes)) + return -EFAULT; + + /* Convert to u16 */ + for (in = 0, out = 0; in < bytes; in += consumed) { + s32 value; + + value = synth_utf8_get(buf + in, bytes - in, &consumed, &want); + if (value == -1) { + /* Invalid or incomplete */ + + if (want > bytes - in) + /* We don't have it all yet, stop here + * and wait for the rest + */ + bytes = in; + + continue; + } + + if (value < 0x10000) + ubuf[out++] = value; + } + + count -= bytes; + ptr += bytes; + + /* And speak this up */ + if (out) { + spin_lock_irqsave(&speakup_info.spinlock, flags); + for (in = 0; in < out; in++) + synth_buffer_add(ubuf[in]); + synth_start(); + spin_unlock_irqrestore(&speakup_info.spinlock, flags); + } + } + + return (ssize_t)(nbytes - count); +} + static ssize_t speakup_file_read(struct file *fp, char __user *buf, size_t nbytes, loff_t *ppos) { @@ -62,31 +122,57 @@ static const struct file_operations synth_fops = { .release = speakup_file_release, }; +static const struct file_operations synthu_fops = { + .read = speakup_file_read, + .write = speakup_file_writeu, + .open = speakup_file_open, + .release = speakup_file_release, +}; + static struct miscdevice synth_device = { .minor = MISC_DYNAMIC_MINOR, .name = "synth", .fops = &synth_fops, }; +static struct miscdevice synthu_device = { + .minor = MISC_DYNAMIC_MINOR, + .name = "synthu", + .fops = &synthu_fops, +}; + void speakup_register_devsynth(void) { - if (misc_registered != 0) - return; -/* zero it so if register fails, deregister will not ref invalid ptrs */ - if (misc_register(&synth_device)) { - pr_warn("Couldn't initialize miscdevice /dev/synth.\n"); - } else { - pr_info("initialized device: /dev/synth, node (MAJOR %d, MINOR %d)\n", - MISC_MAJOR, synth_device.minor); - misc_registered = 1; + if (!synth_registered) { + if (misc_register(&synth_device)) { + pr_warn("Couldn't initialize miscdevice /dev/synth.\n"); + } else { + pr_info("initialized device: /dev/synth, node (MAJOR %d, MINOR %d)\n", + MISC_MAJOR, synth_device.minor); + synth_registered = 1; + } + } + if (!synthu_registered) { + if (misc_register(&synthu_device)) { + pr_warn("Couldn't initialize miscdevice /dev/synthu.\n"); + } else { + pr_info("initialized device: /dev/synthu, node (MAJOR %d, MINOR %d)\n", + MISC_MAJOR, synthu_device.minor); + synthu_registered = 1; + } } } void speakup_unregister_devsynth(void) { - if (!misc_registered) - return; - pr_info("speakup: unregistering synth device /dev/synth\n"); - misc_deregister(&synth_device); - misc_registered = 0; + if (synth_registered) { + pr_info("speakup: unregistering synth device /dev/synth\n"); + misc_deregister(&synth_device); + synth_registered = 0; + } + if (synthu_registered) { + pr_info("speakup: unregistering synth device /dev/synthu\n"); + misc_deregister(&synthu_device); + synthu_registered = 0; + } } |