| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * |
| * Copyright (C) 2007 Google, Inc. |
| * Copyright (c) 2011, Code Aurora Forum. All rights reserved. |
| * Author: Brian Swetland <swetland@google.com> |
| */ |
| |
| .macro addruart, rp, rv, tmp |
| ldr \rp, =CONFIG_DEBUG_UART_PHYS |
| ldr \rv, =CONFIG_DEBUG_UART_VIRT |
| .endm |
| |
| .macro senduart, rd, rx |
| ARM_BE8(rev \rd, \rd ) |
| @ Write the 1 character to UARTDM_TF |
| str \rd, [\rx, #0x70] |
| .endm |
| |
| .macro waituart, rd, rx |
| @ check for TX_EMT in UARTDM_SR |
| ldr \rd, [\rx, #0x08] |
| ARM_BE8(rev \rd, \rd ) |
| tst \rd, #0x08 |
| bne 1002f |
| @ wait for TXREADY in UARTDM_ISR |
| 1001: ldr \rd, [\rx, #0x14] |
| ARM_BE8(rev \rd, \rd ) |
| tst \rd, #0x80 |
| beq 1001b |
| 1002: |
| @ Clear TX_READY by writing to the UARTDM_CR register |
| mov \rd, #0x300 |
| ARM_BE8(rev \rd, \rd ) |
| str \rd, [\rx, #0x10] |
| @ Write 0x1 to NCF register |
| mov \rd, #0x1 |
| ARM_BE8(rev \rd, \rd ) |
| str \rd, [\rx, #0x40] |
| @ UARTDM reg. Read to induce delay |
| ldr \rd, [\rx, #0x08] |
| .endm |
| |
| .macro busyuart, rd, rx |
| .endm |
