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