arch/sh/kernel/cpu/sh3/serial-sh7720.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/serial_sci.h>
   3 #include <linux/serial_core.h>
   4 #include <linux/io.h>
   5 #include <cpu/serial.h>
   6 #include <cpu/gpio.h>
   7
   8 static void sh7720_sci_init_pins(struct uart_port *port, unsigned int cflag)
   9 {
  10         unsigned short data;
  11
  12         if (cflag & CRTSCTS) {
  13                 /* enable RTS/CTS */
  14                 if (port->mapbase == 0xa4430000) { /* SCIF0 */
  15                         /* Clear PTCR bit 9-2; enable all scif pins but sck */
  16                         data = __raw_readw(PORT_PTCR);
  17                         __raw_writew((data & 0xfc03), PORT_PTCR);
  18                 } else if (port->mapbase == 0xa4438000) { /* SCIF1 */
  19                         /* Clear PVCR bit 9-2 */
  20                         data = __raw_readw(PORT_PVCR);
  21                         __raw_writew((data & 0xfc03), PORT_PVCR);
  22                 }
  23         } else {
  24                 if (port->mapbase == 0xa4430000) { /* SCIF0 */
  25                         /* Clear PTCR bit 5-2; enable only tx and rx  */
  26                         data = __raw_readw(PORT_PTCR);
  27                         __raw_writew((data & 0xffc3), PORT_PTCR);
  28                 } else if (port->mapbase == 0xa4438000) { /* SCIF1 */
  29                         /* Clear PVCR bit 5-2 */
  30                         data = __raw_readw(PORT_PVCR);
  31                         __raw_writew((data & 0xffc3), PORT_PVCR);
  32                 }
  33         }
  34 }
  35
  36 struct plat_sci_port_ops sh7720_sci_port_ops = {
  37         .init_pins      = sh7720_sci_init_pins,
  38 };