[linux-block.git] / arch / sh / kernel / cpu / sh3 / serial-sh770x.c

// SPDX-License-Identifier: GPL-2.0
#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,
};
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
61a6976b PM	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	};