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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 by Ben Dooks
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) & 0x00ffffff)
19
20 .pushsection .data
21 .align 2
22omap_uart_phys: .word 0
23omap_uart_virt: .word 0
24omap_uart_lsr: .word 0
25 .popsection
26
27 .macro addruart, rp, rv, tmp
28
29 /* Use omap_uart_phys/virt if already configured */
3010: adr \rp, 99f @ get effective addr of 99f
31 ldr \rv, [\rp] @ get absolute addr of 99f
32 sub \rv, \rv, \rp @ offset between the two
33 ldr \rp, [\rp, #4] @ abs addr of omap_uart_phys
34 sub \tmp, \rp, \rv @ make it effective
35 ldr \rp, [\tmp, #0] @ omap_uart_phys
36 ldr \rv, [\tmp, #4] @ omap_uart_virt
37 cmp \rp, #0 @ is port configured?
38 cmpne \rv, #0
39 bne 100f @ already configured
40
41 /* Configure the UART offset from the phys/virt base */
42#ifdef CONFIG_DEBUG_ZOOM_UART
43 ldr \rp, =ZOOM_UART_BASE
44 str \rp, [\tmp, #0] @ omap_uart_phys
45 ldr \rp, =ZOOM_UART_VIRT
46 str \rp, [\tmp, #4] @ omap_uart_virt
47 mov \rp, #(UART_LSR << ZOOM_PORT_SHIFT)
48 str \rp, [\tmp, #8] @ omap_uart_lsr
49#endif
50 b 10b
51
52 .align
5399: .word .
54 .word omap_uart_phys
55 .ltorg
56
57100: /* Pass the UART_LSR reg address */
58 ldr \tmp, [\tmp, #8] @ omap_uart_lsr
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 @ preserve LSR reg offset
65 bic \rx, \rx, #0xff @ get base (THR) reg address
66 strb \rd, [\rx] @ send lower byte of rd
67 orr \rx, \rx, \rd, lsr #24 @ restore original rx (LSR)
68 bic \rd, \rd, #(0xff << 24) @ restore original rd
69 .endm
70
71 .macro busyuart,rd,rx
721001: ldrb \rd, [\rx] @ rx contains UART_LSR address
73 and \rd, \rd, #(UART_LSR_TEMT | UART_LSR_THRE)
74 teq \rd, #(UART_LSR_TEMT | UART_LSR_THRE)
75 bne 1001b
76 .endm
77
78 .macro waituartcts,rd,rx
79 .endm
80
81 .macro waituarttxrdy,rd,rx
82 .endm
1/*
2 * Debugging macro include header
3 *
4 * Copyright (C) 1994-1999 Russell King
5 * Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11*/
12
13#include <linux/serial_reg.h>
14
15/* OMAP2 serial ports */
16#define OMAP2_UART1_BASE 0x4806a000
17#define OMAP2_UART2_BASE 0x4806c000
18#define OMAP2_UART3_BASE 0x4806e000
19
20/* OMAP3 serial ports */
21#define OMAP3_UART1_BASE OMAP2_UART1_BASE
22#define OMAP3_UART2_BASE OMAP2_UART2_BASE
23#define OMAP3_UART3_BASE 0x49020000
24#define OMAP3_UART4_BASE 0x49042000 /* Only on 36xx */
25#define OMAP3_UART4_AM35XX_BASE 0x4809E000 /* Only on AM35xx */
26
27/* OMAP4 serial ports */
28#define OMAP4_UART1_BASE OMAP2_UART1_BASE
29#define OMAP4_UART2_BASE OMAP2_UART2_BASE
30#define OMAP4_UART3_BASE 0x48020000
31#define OMAP4_UART4_BASE 0x4806e000
32
33/* TI81XX serial ports */
34#define TI81XX_UART1_BASE 0x48020000
35#define TI81XX_UART2_BASE 0x48022000
36#define TI81XX_UART3_BASE 0x48024000
37
38/* AM3505/3517 UART4 */
39#define AM35XX_UART4_BASE 0x4809E000 /* Only on AM3505/3517 */
40
41/* AM33XX serial port */
42#define AM33XX_UART1_BASE 0x44E09000
43
44/* OMAP5 serial ports */
45#define OMAP5_UART1_BASE OMAP2_UART1_BASE
46#define OMAP5_UART2_BASE OMAP2_UART2_BASE
47#define OMAP5_UART3_BASE OMAP4_UART3_BASE
48#define OMAP5_UART4_BASE OMAP4_UART4_BASE
49#define OMAP5_UART5_BASE 0x48066000
50#define OMAP5_UART6_BASE 0x48068000
51
52/* External port on Zoom2/3 */
53#define ZOOM_UART_BASE 0x10000000
54#define ZOOM_UART_VIRT 0xfa400000
55
56#define OMAP_PORT_SHIFT 2
57#define ZOOM_PORT_SHIFT 1
58
59#define UART_OFFSET(addr) ((addr) & 0x00ffffff)
60
61 .pushsection .data
62omap_uart_phys: .word 0
63omap_uart_virt: .word 0
64omap_uart_lsr: .word 0
65 .popsection
66
67 .macro addruart, rp, rv, tmp
68
69 /* Use omap_uart_phys/virt if already configured */
7010: adr \rp, 99f @ get effective addr of 99f
71 ldr \rv, [\rp] @ get absolute addr of 99f
72 sub \rv, \rv, \rp @ offset between the two
73 ldr \rp, [\rp, #4] @ abs addr of omap_uart_phys
74 sub \tmp, \rp, \rv @ make it effective
75 ldr \rp, [\tmp, #0] @ omap_uart_phys
76 ldr \rv, [\tmp, #4] @ omap_uart_virt
77 cmp \rp, #0 @ is port configured?
78 cmpne \rv, #0
79 bne 100f @ already configured
80
81 /* Configure the UART offset from the phys/virt base */
82#ifdef CONFIG_DEBUG_OMAP2UART1
83 mov \rp, #UART_OFFSET(OMAP2_UART1_BASE) @ omap2/3/4
84 b 98f
85#endif
86#ifdef CONFIG_DEBUG_OMAP2UART2
87 mov \rp, #UART_OFFSET(OMAP2_UART2_BASE) @ omap2/3/4
88 b 98f
89#endif
90#ifdef CONFIG_DEBUG_OMAP2UART3
91 mov \rp, #UART_OFFSET(OMAP2_UART3_BASE)
92 b 98f
93#endif
94#ifdef CONFIG_DEBUG_OMAP3UART3
95 mov \rp, #UART_OFFSET(OMAP3_UART1_BASE)
96 add \rp, \rp, #0x00fb0000
97 add \rp, \rp, #0x00006000 @ OMAP3_UART3_BASE
98 b 98f
99#endif
100#ifdef CONFIG_DEBUG_OMAP4UART3
101 mov \rp, #UART_OFFSET(OMAP4_UART3_BASE)
102 b 98f
103#endif
104#ifdef CONFIG_DEBUG_OMAP3UART4
105 mov \rp, #UART_OFFSET(OMAP3_UART1_BASE)
106 add \rp, \rp, #0x00fb0000
107 add \rp, \rp, #0x00028000 @ OMAP3_UART4_BASE
108 b 98f
109#endif
110#ifdef CONFIG_DEBUG_OMAP4UART4
111 mov \rp, #UART_OFFSET(OMAP4_UART4_BASE)
112 b 98f
113#endif
114#ifdef CONFIG_DEBUG_TI81XXUART1
115 mov \rp, #UART_OFFSET(TI81XX_UART1_BASE)
116 b 98f
117#endif
118#ifdef CONFIG_DEBUG_TI81XXUART2
119 mov \rp, #UART_OFFSET(TI81XX_UART2_BASE)
120 b 98f
121#endif
122#ifdef CONFIG_DEBUG_TI81XXUART3
123 mov \rp, #UART_OFFSET(TI81XX_UART3_BASE)
124 b 98f
125#endif
126#ifdef CONFIG_DEBUG_AM33XXUART1
127 ldr \rp, =AM33XX_UART1_BASE
128 and \rp, \rp, #0x00ffffff
129 b 97f
130#endif
131#ifdef CONFIG_DEBUG_ZOOM_UART
132 ldr \rp, =ZOOM_UART_BASE
133 str \rp, [\tmp, #0] @ omap_uart_phys
134 ldr \rp, =ZOOM_UART_VIRT
135 str \rp, [\tmp, #4] @ omap_uart_virt
136 mov \rp, #(UART_LSR << ZOOM_PORT_SHIFT)
137 str \rp, [\tmp, #8] @ omap_uart_lsr
138#endif
139 b 10b
140
141 /* AM33XX: Store both phys and virt address for the uart */
14297: add \rp, \rp, #0x44000000 @ phys base
143 str \rp, [\tmp, #0] @ omap_uart_phys
144 sub \rp, \rp, #0x44000000 @ phys base
145 add \rp, \rp, #0xf9000000 @ virt base
146 str \rp, [\tmp, #4] @ omap_uart_virt
147 mov \rp, #(UART_LSR << OMAP_PORT_SHIFT)
148 str \rp, [\tmp, #8] @ omap_uart_lsr
149
150 b 10b
151
152 /* Store both phys and virt address for the uart */
15398: add \rp, \rp, #0x48000000 @ phys base
154 str \rp, [\tmp, #0] @ omap_uart_phys
155 sub \rp, \rp, #0x48000000 @ phys base
156 add \rp, \rp, #0xfa000000 @ virt base
157 str \rp, [\tmp, #4] @ omap_uart_virt
158 mov \rp, #(UART_LSR << OMAP_PORT_SHIFT)
159 str \rp, [\tmp, #8] @ omap_uart_lsr
160
161 b 10b
162
163 .align
16499: .word .
165 .word omap_uart_phys
166 .ltorg
167
168100: /* Pass the UART_LSR reg address */
169 ldr \tmp, [\tmp, #8] @ omap_uart_lsr
170 add \rp, \rp, \tmp
171 add \rv, \rv, \tmp
172 .endm
173
174 .macro senduart,rd,rx
175 orr \rd, \rd, \rx, lsl #24 @ preserve LSR reg offset
176 bic \rx, \rx, #0xff @ get base (THR) reg address
177 strb \rd, [\rx] @ send lower byte of rd
178 orr \rx, \rx, \rd, lsr #24 @ restore original rx (LSR)
179 bic \rd, \rd, #(0xff << 24) @ restore original rd
180 .endm
181
182 .macro busyuart,rd,rx
1831001: ldrb \rd, [\rx] @ rx contains UART_LSR address
184 and \rd, \rd, #(UART_LSR_TEMT | UART_LSR_THRE)
185 teq \rd, #(UART_LSR_TEMT | UART_LSR_THRE)
186 bne 1001b
187 .endm
188
189 .macro waituart,rd,rx
190 .endm