Blackfin Serial Driver: Enable IR function when user application (irattach /dev/ttyBFx -s) call TIOCSETD ioctl with line discipline N_IRDA
Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
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1 changed files with 26 additions and 0 deletions
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@ -900,6 +900,31 @@ bfin_serial_verify_port(struct uart_port *port, struct serial_struct *ser)
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return 0;
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}
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/*
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* Enable the IrDA function if tty->ldisc.num is N_IRDA.
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* In other cases, disable IrDA function.
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*/
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static void bfin_set_ldisc(struct tty_struct *tty)
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{
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int line = tty->index;
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unsigned short val;
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if (line >= tty->driver->num)
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return;
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switch (tty->ldisc.num) {
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case N_IRDA:
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val = UART_GET_GCTL(&bfin_serial_ports[line]);
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val |= (IREN | RPOLC);
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UART_PUT_GCTL(&bfin_serial_ports[line], val);
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break;
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default:
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val = UART_GET_GCTL(&bfin_serial_ports[line]);
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val &= ~(IREN | RPOLC);
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UART_PUT_GCTL(&bfin_serial_ports[line], val);
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}
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}
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static struct uart_ops bfin_serial_pops = {
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.tx_empty = bfin_serial_tx_empty,
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.set_mctrl = bfin_serial_set_mctrl,
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@ -1261,6 +1286,7 @@ static int __init bfin_serial_init(void)
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ret = uart_register_driver(&bfin_serial_reg);
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if (ret == 0) {
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bfin_serial_reg.tty_driver->set_ldisc = bfin_set_ldisc;
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ret = platform_driver_register(&bfin_serial_driver);
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if (ret) {
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pr_debug("uart register failed\n");
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