1/* 2 * 3 * Copyright (C) 2007 Google, Inc. 4 * Copyright (c) 2011, Code Aurora Forum. All rights reserved. 5 * Author: Brian Swetland <swetland@google.com> 6 * 7 * This software is licensed under the terms of the GNU General Public 8 * License version 2, as published by the Free Software Foundation, and 9 * may be copied, distributed, and modified under those terms. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 */ 17 18 .macro addruart, rp, rv, tmp 19 ldr \rp, =CONFIG_DEBUG_UART_PHYS 20 ldr \rv, =CONFIG_DEBUG_UART_VIRT 21 .endm 22 23 .macro senduart, rd, rx 24ARM_BE8(rev \rd, \rd ) 25 @ Write the 1 character to UARTDM_TF 26 str \rd, [\rx, #0x70] 27 .endm 28 29 .macro waituart, rd, rx 30 @ check for TX_EMT in UARTDM_SR 31 ldr \rd, [\rx, #0x08] 32ARM_BE8(rev \rd, \rd ) 33 tst \rd, #0x08 34 bne 1002f 35 @ wait for TXREADY in UARTDM_ISR 361001: ldr \rd, [\rx, #0x14] 37ARM_BE8(rev \rd, \rd ) 38 tst \rd, #0x80 39 beq 1001b 401002: 41 @ Clear TX_READY by writing to the UARTDM_CR register 42 mov \rd, #0x300 43ARM_BE8(rev \rd, \rd ) 44 str \rd, [\rx, #0x10] 45 @ Write 0x1 to NCF register 46 mov \rd, #0x1 47ARM_BE8(rev \rd, \rd ) 48 str \rd, [\rx, #0x40] 49 @ UARTDM reg. Read to induce delay 50 ldr \rd, [\rx, #0x08] 51 .endm 52 53 .macro busyuart, rd, rx 54 .endm 55