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https://github.com/ARM-software/arm-trusted-firmware.git
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89345562d6
This patch replaces the magic numbers of the UART base addresses with the corresponding macros defined in the appropriate platform file. Change-Id: Ie6a4555a659e9f722a8d819958ad9a2dee7c3aa0 Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
58 lines
1.2 KiB
C
58 lines
1.2 KiB
C
/*
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* Copyright (c) 2023, Pengutronix. 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 <lib/mmio.h>
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#include <platform_def.h>
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#define UCR1 0x80
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#define UCR1_UARTEN BIT(0)
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#define DOMAIN0_RUNNING(d) (((d) & 0x3) != 0)
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static struct imx_uart {
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unsigned int ccm_reg;
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unsigned int uart_base;
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} imx8m_uart_info[] = {
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{ /* UART 1 */
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.ccm_reg = 0x4490,
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.uart_base = IMX_UART1_BASE,
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}, { /* UART 2 */
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.ccm_reg = 0x44a0,
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.uart_base = IMX_UART2_BASE,
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}, { /* UART 3 */
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.ccm_reg = 0x44b0,
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.uart_base = IMX_UART3_BASE,
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}, { /* UART 4 */
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.ccm_reg = 0x44c0,
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.uart_base = IMX_UART4_BASE,
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}
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};
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unsigned int imx8m_uart_get_base(void)
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{
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(imx8m_uart_info); i++) {
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uint32_t val;
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/*
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* At least check that the clock-gate is ungated before we
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* access the UART register.
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*/
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val = mmio_read_32(IMX_CCM_BASE + imx8m_uart_info[i].ccm_reg);
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if (DOMAIN0_RUNNING(val)) {
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val = mmio_read_32(imx8m_uart_info[i].uart_base + UCR1);
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if (val & UCR1_UARTEN) {
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return imx8m_uart_info[i].uart_base;
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}
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}
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}
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/*
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* We should return an error and inform the user but we can't do it
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* this early.
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*/
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return 0;
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}
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