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 15 ARM_BE8(rev \rd, \rd ) 16 @ Write the 1 character to UARTDM_TF 17 str \rd, [\rx, #0x70] 18 .endm 19 20 .macro waituartcts,rd,rx 21 .endm 22 23 .macro waituarttxrdy, rd, rx 24 @ check for TX_EMT in UARTDM_SR 25 ldr \rd, [\rx, #0x08] 26 ARM_BE8(rev \rd, \rd ) 27 tst \rd, #0x08 28 bne 1002f 29 @ wait for TXREADY in UARTDM_ISR 30 1001: ldr \rd, [\rx, #0x14] 31 ARM_BE8(rev \rd, \rd ) 32 tst \rd, #0x80 33 beq 1001b 34 1002: 35 @ Clear TX_READY by writing to the UARTDM_CR register 36 mov \rd, #0x300 37 ARM_BE8(rev \rd, \rd ) 38 str \rd, [\rx, #0x10] 39 @ Write 0x1 to NCF register 40 mov \rd, #0x1 41 ARM_BE8(rev \rd, \rd ) 42 str \rd, [\rx, #0x40] 43 @ UARTDM reg. Read to induce delay 44 ldr \rd, [\rx, #0x08] 45 .endm 46 47 .macro busyuart, rd, rx 48 .endm 49