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https://github.com/ARM-software/arm-trusted-firmware.git
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072d7532d2
Rename driver file to BSEC2. Split header file in IP and feature parts. Add functions to access BSEC scratch register. Several corrections and improvements. Probe the driver earlier, especially to check debug features. Change-Id: I1981536398d598d67a19d2d7766dacc18de72ec1 Signed-off-by: Nicolas Le Bayon <nicolas.le.bayon@st.com> Signed-off-by: Yann Gautier <yann.gautier@st.com>
74 lines
1.6 KiB
C
74 lines
1.6 KiB
C
/*
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* Copyright (c) 2016-2022, STMicroelectronics - All Rights Reserved
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <assert.h>
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#include <errno.h>
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#include <common/debug.h>
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#include <drivers/st/bsec.h>
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#include <drivers/st/bsec2_reg.h>
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#include <drivers/st/stm32mp1_rcc.h>
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#include <lib/mmio.h>
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#include <lib/utils_def.h>
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#include <platform_def.h>
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#include <stm32mp1_dbgmcu.h>
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#define DBGMCU_IDC U(0x00)
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#define DBGMCU_IDC_DEV_ID_MASK GENMASK(11, 0)
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#define DBGMCU_IDC_REV_ID_MASK GENMASK(31, 16)
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#define DBGMCU_IDC_REV_ID_SHIFT 16
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static int stm32mp1_dbgmcu_init(void)
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{
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if ((bsec_read_debug_conf() & BSEC_DBGSWGEN) == 0U) {
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INFO("Software access to all debug components is disabled\n");
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return -1;
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}
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mmio_setbits_32(RCC_BASE + RCC_DBGCFGR, RCC_DBGCFGR_DBGCKEN);
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return 0;
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}
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/*
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* @brief Get silicon revision from DBGMCU registers.
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* @param chip_version: pointer to the read value.
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* @retval 0 on success, negative value on failure.
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*/
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int stm32mp1_dbgmcu_get_chip_version(uint32_t *chip_version)
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{
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assert(chip_version != NULL);
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if (stm32mp1_dbgmcu_init() != 0) {
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return -EPERM;
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}
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*chip_version = (mmio_read_32(DBGMCU_BASE + DBGMCU_IDC) &
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DBGMCU_IDC_REV_ID_MASK) >> DBGMCU_IDC_REV_ID_SHIFT;
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return 0;
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}
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/*
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* @brief Get device ID from DBGMCU registers.
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* @param chip_dev_id: pointer to the read value.
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* @retval 0 on success, negative value on failure.
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*/
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int stm32mp1_dbgmcu_get_chip_dev_id(uint32_t *chip_dev_id)
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{
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assert(chip_dev_id != NULL);
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if (stm32mp1_dbgmcu_init() != 0) {
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return -EPERM;
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}
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*chip_dev_id = mmio_read_32(DBGMCU_BASE + DBGMCU_IDC) &
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DBGMCU_IDC_DEV_ID_MASK;
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return 0;
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}
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