1/* SPDX-License-Identifier: GPL-2.0-only */ 2/* 3 * 4 * Copyright (C) 2007 Google, Inc. 5 * Copyright (c) 2011, Code Aurora Forum. All rights reserved. 6 * Author: Brian Swetland <swetland@google.com> 7 */ 8 9 .macro addruart, rp, rv, tmp 10 ldr \rp, =CONFIG_DEBUG_UART_PHYS 11 ldr \rv, =CONFIG_DEBUG_UART_VIRT 12 .endm 13 14 .macro senduart, rd, rx 15ARM_BE8(rev \rd, \rd ) 16 @ Write the 1 character to UARTDM_TF 17 str \rd, [\rx, #0x70] 18 .endm 19 20 .macro waituart, rd, rx 21 @ check for TX_EMT in UARTDM_SR 22 ldr \rd, [\rx, #0x08] 23ARM_BE8(rev \rd, \rd ) 24 tst \rd, #0x08 25 bne 1002f 26 @ wait for TXREADY in UARTDM_ISR 271001: ldr \rd, [\rx, #0x14] 28ARM_BE8(rev \rd, \rd ) 29 tst \rd, #0x80 30 beq 1001b 311002: 32 @ Clear TX_READY by writing to the UARTDM_CR register 33 mov \rd, #0x300 34ARM_BE8(rev \rd, \rd ) 35 str \rd, [\rx, #0x10] 36 @ Write 0x1 to NCF register 37 mov \rd, #0x1 38ARM_BE8(rev \rd, \rd ) 39 str \rd, [\rx, #0x40] 40 @ UARTDM reg. Read to induce delay 41 ldr \rd, [\rx, #0x08] 42 .endm 43 44 .macro busyuart, rd, rx 45 .endm 46