LXR linux/arch/sh/kernel/cpu/sh3/serial-sh770x.c

   1#include <linux/serial_sci.h>
   2#include <linux/serial_core.h>
   3#include <linux/io.h>
   4#include <cpu/serial.h>
   5
   6#define SCPCR 0xA4000116
   7#define SCPDR 0xA4000136
   8
   9static void sh770x_sci_init_pins(struct uart_port *port, unsigned int cflag)
  10{
  11        unsigned short data;
  12
  13        /* We need to set SCPCR to enable RTS/CTS */
  14        data = __raw_readw(SCPCR);
  15        /* Clear out SCP7MD1,0, SCP6MD1,0, SCP4MD1,0*/
  16        __raw_writew(data & 0x0fcf, SCPCR);
  17
  18        if (!(cflag & CRTSCTS)) {
  19                /* We need to set SCPCR to enable RTS/CTS */
  20                data = __raw_readw(SCPCR);
  21                /* Clear out SCP7MD1,0, SCP4MD1,0,
  22                   Set SCP6MD1,0 = {01} (output)  */
  23                __raw_writew((data & 0x0fcf) | 0x1000, SCPCR);
  24
  25                data = __raw_readb(SCPDR);
  26                /* Set /RTS2 (bit6) = 0 */
  27                __raw_writeb(data & 0xbf, SCPDR);
  28        }
  29}
  30
  31struct plat_sci_port_ops sh770x_sci_port_ops = {
  32        .init_pins      = sh770x_sci_init_pins,
  33};
  34