^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) #include <linux/tty.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) #include <linux/tty_flip.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include "speakup.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include "spk_types.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include "spk_priv.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) struct spk_ldisc_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) char buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) struct completion completion;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) bool buf_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) static struct spk_synth *spk_ttyio_synth;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) static struct tty_struct *speakup_tty;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) /* mutex to protect against speakup_tty disappearing from underneath us while
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * we are using it. this can happen when the device physically unplugged,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * while in use. it also serialises access to speakup_tty.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static DEFINE_MUTEX(speakup_tty_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) static int ser_to_dev(int ser, dev_t *dev_no)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) if (ser < 0 || ser > (255 - 64)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) pr_err("speakup: Invalid ser param. Must be between 0 and 191 inclusive.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) *dev_no = MKDEV(4, (64 + ser));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) static int get_dev_to_use(struct spk_synth *synth, dev_t *dev_no)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) /* use ser only when dev is not specified */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) if (strcmp(synth->dev_name, SYNTH_DEFAULT_DEV) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) synth->ser == SYNTH_DEFAULT_SER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) return tty_dev_name_to_number(synth->dev_name, dev_no);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) return ser_to_dev(synth->ser, dev_no);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) static int spk_ttyio_ldisc_open(struct tty_struct *tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) struct spk_ldisc_data *ldisc_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) if (tty != speakup_tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) /* Somebody tried to use this line discipline outside speakup */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) if (!tty->ops->write)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) return -EOPNOTSUPP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) ldisc_data = kmalloc(sizeof(*ldisc_data), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) if (!ldisc_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) init_completion(&ldisc_data->completion);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) ldisc_data->buf_free = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) tty->disc_data = ldisc_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) static void spk_ttyio_ldisc_close(struct tty_struct *tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) mutex_lock(&speakup_tty_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) kfree(speakup_tty->disc_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) speakup_tty = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) mutex_unlock(&speakup_tty_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) static int spk_ttyio_receive_buf2(struct tty_struct *tty,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) const unsigned char *cp, char *fp, int count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) struct spk_ldisc_data *ldisc_data = tty->disc_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) if (spk_ttyio_synth->read_buff_add) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) for (i = 0; i < count; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) spk_ttyio_synth->read_buff_add(cp[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) if (!ldisc_data->buf_free)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) /* ttyio_in will tty_schedule_flip */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) /* Make sure the consumer has read buf before we have seen
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) * buf_free == true and overwrite buf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) mb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) ldisc_data->buf = cp[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) ldisc_data->buf_free = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) complete(&ldisc_data->completion);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) static struct tty_ldisc_ops spk_ttyio_ldisc_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) .magic = TTY_LDISC_MAGIC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) .name = "speakup_ldisc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) .open = spk_ttyio_ldisc_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) .close = spk_ttyio_ldisc_close,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) .receive_buf2 = spk_ttyio_receive_buf2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) static int spk_ttyio_out(struct spk_synth *in_synth, const char ch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) static int spk_ttyio_out_unicode(struct spk_synth *in_synth, u16 ch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) static void spk_ttyio_send_xchar(char ch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) static void spk_ttyio_tiocmset(unsigned int set, unsigned int clear);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) static unsigned char spk_ttyio_in(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) static unsigned char spk_ttyio_in_nowait(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) static void spk_ttyio_flush_buffer(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) static int spk_ttyio_wait_for_xmitr(struct spk_synth *in_synth);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) struct spk_io_ops spk_ttyio_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) .synth_out = spk_ttyio_out,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) .synth_out_unicode = spk_ttyio_out_unicode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) .send_xchar = spk_ttyio_send_xchar,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) .tiocmset = spk_ttyio_tiocmset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) .synth_in = spk_ttyio_in,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) .synth_in_nowait = spk_ttyio_in_nowait,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) .flush_buffer = spk_ttyio_flush_buffer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) .wait_for_xmitr = spk_ttyio_wait_for_xmitr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) EXPORT_SYMBOL_GPL(spk_ttyio_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) static inline void get_termios(struct tty_struct *tty,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) struct ktermios *out_termios)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) down_read(&tty->termios_rwsem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) *out_termios = tty->termios;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) up_read(&tty->termios_rwsem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) static int spk_ttyio_initialise_ldisc(struct spk_synth *synth)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) struct tty_struct *tty;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) struct ktermios tmp_termios;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) dev_t dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) ret = get_dev_to_use(synth, &dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) tty = tty_kopen(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) if (IS_ERR(tty))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) return PTR_ERR(tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) if (tty->ops->open)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) ret = tty->ops->open(tty, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) ret = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) tty_unlock(tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) clear_bit(TTY_HUPPED, &tty->flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) /* ensure hardware flow control is enabled */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) get_termios(tty, &tmp_termios);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) if (!(tmp_termios.c_cflag & CRTSCTS)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) tmp_termios.c_cflag |= CRTSCTS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) tty_set_termios(tty, &tmp_termios);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) * check c_cflag to see if it's updated as tty_set_termios
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) * may not return error even when no tty bits are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) * changed by the request.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) get_termios(tty, &tmp_termios);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) if (!(tmp_termios.c_cflag & CRTSCTS))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) pr_warn("speakup: Failed to set hardware flow control\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) tty_unlock(tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) mutex_lock(&speakup_tty_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) speakup_tty = tty;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) ret = tty_set_ldisc(tty, N_SPEAKUP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) speakup_tty = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) mutex_unlock(&speakup_tty_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) /* Success */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) pr_err("speakup: Failed to set N_SPEAKUP on tty\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) tty_lock(tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) if (tty->ops->close)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) tty->ops->close(tty, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) tty_unlock(tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) tty_kclose(tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) void spk_ttyio_register_ldisc(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) if (tty_register_ldisc(N_SPEAKUP, &spk_ttyio_ldisc_ops))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) pr_warn("speakup: Error registering line discipline. Most synths won't work.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) void spk_ttyio_unregister_ldisc(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) if (tty_unregister_ldisc(N_SPEAKUP))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) pr_warn("speakup: Couldn't unregister ldisc\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) static int spk_ttyio_out(struct spk_synth *in_synth, const char ch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) mutex_lock(&speakup_tty_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) if (in_synth->alive && speakup_tty && speakup_tty->ops->write) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) int ret = speakup_tty->ops->write(speakup_tty, &ch, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) mutex_unlock(&speakup_tty_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) if (ret == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) /* No room */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) pr_warn("%s: I/O error, deactivating speakup\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) in_synth->long_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) /* No synth any more, so nobody will restart TTYs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) * and we thus need to do it ourselves. Now that there
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) * is no synth we can let application flood anyway
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) in_synth->alive = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) speakup_start_ttys();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) mutex_unlock(&speakup_tty_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) static int spk_ttyio_out_unicode(struct spk_synth *in_synth, u16 ch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) if (ch < 0x80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) ret = spk_ttyio_out(in_synth, ch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) } else if (ch < 0x800) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) ret = spk_ttyio_out(in_synth, 0xc0 | (ch >> 6));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) ret &= spk_ttyio_out(in_synth, 0x80 | (ch & 0x3f));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) ret = spk_ttyio_out(in_synth, 0xe0 | (ch >> 12));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) ret &= spk_ttyio_out(in_synth, 0x80 | ((ch >> 6) & 0x3f));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) ret &= spk_ttyio_out(in_synth, 0x80 | (ch & 0x3f));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) static int check_tty(struct tty_struct *tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) if (!tty) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) pr_warn("%s: I/O error, deactivating speakup\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) spk_ttyio_synth->long_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) /* No synth any more, so nobody will restart TTYs, and we thus
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) * need to do it ourselves. Now that there is no synth we can
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) * let application flood anyway
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) spk_ttyio_synth->alive = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) speakup_start_ttys();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) static void spk_ttyio_send_xchar(char ch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) mutex_lock(&speakup_tty_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) if (check_tty(speakup_tty)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) mutex_unlock(&speakup_tty_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) if (speakup_tty->ops->send_xchar)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) speakup_tty->ops->send_xchar(speakup_tty, ch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) mutex_unlock(&speakup_tty_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) static void spk_ttyio_tiocmset(unsigned int set, unsigned int clear)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) mutex_lock(&speakup_tty_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) if (check_tty(speakup_tty)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) mutex_unlock(&speakup_tty_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) if (speakup_tty->ops->tiocmset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) speakup_tty->ops->tiocmset(speakup_tty, set, clear);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) mutex_unlock(&speakup_tty_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) static int spk_ttyio_wait_for_xmitr(struct spk_synth *in_synth)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) static unsigned char ttyio_in(int timeout)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) struct spk_ldisc_data *ldisc_data = speakup_tty->disc_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) char rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) if (!timeout) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) if (!try_wait_for_completion(&ldisc_data->completion))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) return 0xff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) } else if (wait_for_completion_timeout(&ldisc_data->completion,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) usecs_to_jiffies(timeout)) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) pr_warn("spk_ttyio: timeout (%d) while waiting for input\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) timeout);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) return 0xff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) rv = ldisc_data->buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) /* Make sure we have read buf before we set buf_free to let
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) * the producer overwrite it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) mb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) ldisc_data->buf_free = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) /* Let TTY push more characters */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) tty_schedule_flip(speakup_tty->port);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) return rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) static unsigned char spk_ttyio_in(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) return ttyio_in(SPK_SYNTH_TIMEOUT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) static unsigned char spk_ttyio_in_nowait(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) u8 rv = ttyio_in(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) return (rv == 0xff) ? 0 : rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) static void spk_ttyio_flush_buffer(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) mutex_lock(&speakup_tty_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) if (check_tty(speakup_tty)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) mutex_unlock(&speakup_tty_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) if (speakup_tty->ops->flush_buffer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) speakup_tty->ops->flush_buffer(speakup_tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) mutex_unlock(&speakup_tty_mutex);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) int spk_ttyio_synth_probe(struct spk_synth *synth)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) int rv = spk_ttyio_initialise_ldisc(synth);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) if (rv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) return rv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) synth->alive = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) spk_ttyio_synth = synth;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) EXPORT_SYMBOL_GPL(spk_ttyio_synth_probe);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) void spk_ttyio_release(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) if (!speakup_tty)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) tty_lock(speakup_tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) if (speakup_tty->ops->close)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) speakup_tty->ops->close(speakup_tty, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) tty_ldisc_flush(speakup_tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) tty_unlock(speakup_tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) tty_kclose(speakup_tty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) EXPORT_SYMBOL_GPL(spk_ttyio_release);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) const char *spk_ttyio_synth_immediate(struct spk_synth *synth, const char *buff)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) u_char ch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) while ((ch = *buff)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) if (ch == '\n')
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) ch = synth->procspeech;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) if (tty_write_room(speakup_tty) < 1 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) !synth->io_ops->synth_out(synth, ch))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) return buff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) buff++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) EXPORT_SYMBOL_GPL(spk_ttyio_synth_immediate);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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