35 lines
874 B
C
35 lines
874 B
C
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// SPDX-License-Identifier: GPL-2.0
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#include <linux/serial_sci.h>
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#include <linux/serial_core.h>
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#include <linux/io.h>
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#include <cpu/serial.h>
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#define SCPCR 0xA4000116
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#define SCPDR 0xA4000136
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static void sh770x_sci_init_pins(struct uart_port *port, unsigned int cflag)
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{
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unsigned short data;
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/* We need to set SCPCR to enable RTS/CTS */
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data = __raw_readw(SCPCR);
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/* Clear out SCP7MD1,0, SCP6MD1,0, SCP4MD1,0*/
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__raw_writew(data & 0x0fcf, SCPCR);
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if (!(cflag & CRTSCTS)) {
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/* We need to set SCPCR to enable RTS/CTS */
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data = __raw_readw(SCPCR);
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/* Clear out SCP7MD1,0, SCP4MD1,0,
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Set SCP6MD1,0 = {01} (output) */
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__raw_writew((data & 0x0fcf) | 0x1000, SCPCR);
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data = __raw_readb(SCPDR);
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/* Set /RTS2 (bit6) = 0 */
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__raw_writeb(data & 0xbf, SCPDR);
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}
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}
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struct plat_sci_port_ops sh770x_sci_port_ops = {
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.init_pins = sh770x_sci_init_pins,
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};
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