1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Debugging macro include header
4 *
5 * Copyright (C) 1994-1999 Russell King
6 * Moved from linux/arch/arm/kernel/debug.S b
7 */
8
9 #include <linux/serial_reg.h>
10
11 /* External port on Zoom2/3 */
12 #define ZOOM_UART_BASE 0x10000000
13 #define ZOOM_UART_VIRT 0xfa400000
14
15 #define OMAP_PORT_SHIFT 2
16 #define ZOOM_PORT_SHIFT 1
17
18 #define UART_OFFSET(addr) ((addr) & 0x00
19
20 .pushsection .data
21 .align 2
22 omap_uart_phys: .word 0
23 omap_uart_virt: .word 0
24 omap_uart_lsr: .word 0
25 .popsection
26
27 .macro addruart, rp, rv, tmp
28
29 /* Use omap_uart_phys/virt if
30 10: adr \rp, 99f
31 ldr \rv, [\rp]
32 sub \rv, \rv, \rp
33 ldr \rp, [\rp, #4]
34 sub \tmp, \rp, \rv
35 ldr \rp, [\tmp, #0]
36 ldr \rv, [\tmp, #4]
37 cmp \rp, #0
38 cmpne \rv, #0
39 bne 100f
40
41 /* Configure the UART offset f
42 #ifdef CONFIG_DEBUG_ZOOM_UART
43 ldr \rp, =ZOOM_UART_BASE
44 str \rp, [\tmp, #0]
45 ldr \rp, =ZOOM_UART_VIRT
46 str \rp, [\tmp, #4]
47 mov \rp, #(UART_LSR << ZOO
48 str \rp, [\tmp, #8]
49 #endif
50 b 10b
51
52 .align
53 99: .word .
54 .word omap_uart_phys
55 .ltorg
56
57 100: /* Pass the UART_LSR reg addre
58 ldr \tmp, [\tmp, #8]
59 add \rp, \rp, \tmp
60 add \rv, \rv, \tmp
61 .endm
62
63 .macro senduart,rd,rx
64 orr \rd, \rd, \rx, lsl #24
65 bic \rx, \rx, #0xff
66 strb \rd, [\rx]
67 orr \rx, \rx, \rd, lsr #24
68 bic \rd, \rd, #(0xff << 24
69 .endm
70
71 .macro busyuart,rd,rx
72 1001: ldrb \rd, [\rx]
73 and \rd, \rd, #(UART_LSR_T
74 teq \rd, #(UART_LSR_TEMT |
75 bne 1001b
76 .endm
77
78 .macro waituartcts,rd,rx
79 .endm
80
81 .macro waituarttxrdy,rd,rx
82 .endm
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