Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
26ARM_BE8(rev \rd, \rd )
27#ifdef CONFIG_DEBUG_QCOM_UARTDM
28 @ Write the 1 character to UARTDM_TF
29 str \rd, [\rx, #0x70]
30#else
31 str \rd, [\rx, #0x0C]
32#endif
33 .endm
34
35 .macro waituart, rd, rx
36#ifdef CONFIG_DEBUG_QCOM_UARTDM
37 @ check for TX_EMT in UARTDM_SR
38 ldr \rd, [\rx, #0x08]
39ARM_BE8(rev \rd, \rd )
40 tst \rd, #0x08
41 bne 1002f
42 @ wait for TXREADY in UARTDM_ISR
431001: ldr \rd, [\rx, #0x14]
44ARM_BE8(rev \rd, \rd )
45 tst \rd, #0x80
46 beq 1001b
471002:
48 @ Clear TX_READY by writing to the UARTDM_CR register
49 mov \rd, #0x300
50ARM_BE8(rev \rd, \rd )
51 str \rd, [\rx, #0x10]
52 @ Write 0x1 to NCF register
53 mov \rd, #0x1
54ARM_BE8(rev \rd, \rd )
55 str \rd, [\rx, #0x40]
56 @ UARTDM reg. Read to induce delay
57 ldr \rd, [\rx, #0x08]
58#else
59 @ wait for TX_READY
601001: ldr \rd, [\rx, #0x08]
61ARM_BE8(rev \rd, \rd )
62 tst \rd, #0x04
63 beq 1001b
64#endif
65 .endm
66
67 .macro busyuart, rd, rx
68 .endm