| Horatiu Vultur | c75c908 | 2019-01-12 18:57:00 +0100 | [diff] [blame] | 1 | // SPDX-License-Identifier: (GPL-2.0+ OR MIT) |
| 2 | /* |
| 3 | * Copyright (c) 2018 Microsemi Coprporation |
| 4 | */ |
| 5 | |
| 6 | #include <common.h> |
| 7 | #include <asm/io.h> |
| 8 | #include <spi.h> |
| Simon Glass | cd93d62 | 2020-05-10 11:40:13 -0600 | [diff] [blame] | 9 | #include <linux/bitops.h> |
| Horatiu Vultur | c75c908 | 2019-01-12 18:57:00 +0100 | [diff] [blame] | 10 | |
| 11 | void external_cs_manage(struct udevice *dev, bool enable) |
| 12 | { |
| 13 | u32 cs = spi_chip_select(dev); |
| 14 | /* IF_SI0_OWNER, select the owner of the SI interface |
| 15 | * Encoding: 0: SI Slave |
| 16 | * 1: SI Boot Master |
| 17 | * 2: SI Master Controller |
| 18 | */ |
| 19 | if (!enable) { |
| 20 | writel(ICPU_SW_MODE_SW_PIN_CTRL_MODE | |
| 21 | ICPU_SW_MODE_SW_SPI_CS(BIT(cs)), |
| 22 | BASE_CFG + ICPU_SW_MODE); |
| 23 | clrsetbits_le32(BASE_CFG + ICPU_GENERAL_CTRL, |
| 24 | ICPU_GENERAL_CTRL_IF_SI_OWNER_M, |
| 25 | ICPU_GENERAL_CTRL_IF_SI_OWNER(2)); |
| 26 | } else { |
| 27 | writel(0, BASE_CFG + ICPU_SW_MODE); |
| 28 | clrsetbits_le32(BASE_CFG + ICPU_GENERAL_CTRL, |
| 29 | ICPU_GENERAL_CTRL_IF_SI_OWNER_M, |
| 30 | ICPU_GENERAL_CTRL_IF_SI_OWNER(1)); |
| 31 | } |
| 32 | } |