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#ifdef CONFIG_DEBUG_UART_PHYS 20 ldr \rp, =CONFIG_DEBUG_UART_PHYS 21 ldr \rv, =CONFIG_DEBUG_UART_VIRT 22#endif 23 .endm 24 25 .macro senduart, rd, rx 26#ifdef CONFIG_DEBUG_QCOM_UARTDM 27 @ Write the 1 character to UARTDM_TF 28 str \rd, [\rx, #0x70] 29#else 30 str \rd, [\rx, #0x0C] 31#endif 32 .endm 33 34 .macro waituart, rd, rx 35#ifdef CONFIG_DEBUG_QCOM_UARTDM 36 @ check for TX_EMT in UARTDM_SR 37 ldr \rd, [\rx, #0x08] 38 tst \rd, #0x08 39 bne 1002f 40 @ wait for TXREADY in UARTDM_ISR 411001: ldr \rd, [\rx, #0x14] 42 tst \rd, #0x80 43 beq 1001b 441002: 45 @ Clear TX_READY by writing to the UARTDM_CR register 46 mov \rd, #0x300 47 str \rd, [\rx, #0x10] 48 @ Write 0x1 to NCF register 49 mov \rd, #0x1 50 str \rd, [\rx, #0x40] 51 @ UARTDM reg. Read to induce delay 52 ldr \rd, [\rx, #0x08] 53#else 54 @ wait for TX_READY 551001: ldr \rd, [\rx, #0x08] 56 tst \rd, #0x04 57 beq 1001b 58#endif 59 .endm 60 61 .macro busyuart, rd, rx 62 .endm 63