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 7 #define SCPCR 0xA4000116 8 #define SCPDR 0xA4000136 9 10 static void sh770x_sci_init_pins(struct uart_port *port, unsigned int cflag) 11 { 12 unsigned short data; 13 14 /* We need to set SCPCR to enable RTS/CTS */ 15 data = __raw_readw(SCPCR); 16 /* Clear out SCP7MD1,0, SCP6MD1,0, SCP4MD1,0*/ 17 __raw_writew(data & 0x0fcf, SCPCR); 18 19 if (!(cflag & CRTSCTS)) { 20 /* We need to set SCPCR to enable RTS/CTS */ 21 data = __raw_readw(SCPCR); 22 /* Clear out SCP7MD1,0, SCP4MD1,0, 23 Set SCP6MD1,0 = {01} (output) */ 24 __raw_writew((data & 0x0fcf) | 0x1000, SCPCR); 25 26 data = __raw_readb(SCPDR); 27 /* Set /RTS2 (bit6) = 0 */ 28 __raw_writeb(data & 0xbf, SCPDR); 29 } 30 } 31 32 struct plat_sci_port_ops sh770x_sci_port_ops = { 33 .init_pins = sh770x_sci_init_pins, 34 }; 35