serial-sh770x.c

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#include <linux/serial_sci.h>
#include <linux/serial_core.h>
#include <linux/io.h>
#include <cpu/serial.h>

#define SCPCR 0xA4000116
#define SCPDR 0xA4000136

static void sh770x_sci_init_pins(struct uart_port *port, unsigned int cflag)
{
    unsigned short data;

    /* We need to set SCPCR to enable RTS/CTS */
    data = __raw_readw(SCPCR);
    /* Clear out SCP7MD1,0, SCP6MD1,0, SCP4MD1,0*/
    __raw_writew(data & 0x0fcf, SCPCR);

    if (!(cflag & CRTSCTS)) {
        /* We need to set SCPCR to enable RTS/CTS */
        data = __raw_readw(SCPCR);
        /* Clear out SCP7MD1,0, SCP4MD1,0,
           Set SCP6MD1,0 = {01} (output)  */
        __raw_writew((data & 0x0fcf) | 0x1000, SCPCR);

        data = __raw_readb(SCPDR);
        /* Set /RTS2 (bit6) = 0 */
        __raw_writeb(data & 0xbf, SCPDR);
    }
}

struct plat_sci_port_ops sh770x_sci_port_ops = {
    .init_pins  = sh770x_sci_init_pins,
};