33 lines
856 B
C
33 lines
856 B
C
// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
|
|
/*
|
|
* Copyright (c) 2018 Microsemi Coprporation
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/io.h>
|
|
#include <spi.h>
|
|
#include <linux/bitops.h>
|
|
|
|
void external_cs_manage(struct udevice *dev, bool enable)
|
|
{
|
|
u32 cs = spi_chip_select(dev);
|
|
/* IF_SI0_OWNER, select the owner of the SI interface
|
|
* Encoding: 0: SI Slave
|
|
* 1: SI Boot Master
|
|
* 2: SI Master Controller
|
|
*/
|
|
if (!enable) {
|
|
writel(ICPU_SW_MODE_SW_PIN_CTRL_MODE |
|
|
ICPU_SW_MODE_SW_SPI_CS(BIT(cs)),
|
|
BASE_CFG + ICPU_SW_MODE);
|
|
clrsetbits_le32(BASE_CFG + ICPU_GENERAL_CTRL,
|
|
ICPU_GENERAL_CTRL_IF_SI_OWNER_M,
|
|
ICPU_GENERAL_CTRL_IF_SI_OWNER(2));
|
|
} else {
|
|
writel(0, BASE_CFG + ICPU_SW_MODE);
|
|
clrsetbits_le32(BASE_CFG + ICPU_GENERAL_CTRL,
|
|
ICPU_GENERAL_CTRL_IF_SI_OWNER_M,
|
|
ICPU_GENERAL_CTRL_IF_SI_OWNER(1));
|
|
}
|
|
}
|