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
   9 static 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
  31 struct plat_sci_port_ops sh770x_sci_port_ops = {
  32         .init_pins      = sh770x_sci_init_pins,
  33 };