1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 *
4 * Copyright (C) 2007 Google, Inc.
5 * Copyright (c) 2011, Code Aurora Forum. All
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 UAR
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
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