1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /* Copyright (C) 2016 Broadcom */
3 #include <linux/serial_reg.h>
4 #include <asm/cputype.h>
5
6 /* Physical register offset and virtual regist
7 #define REG_PHYS_BASE 0xf0000000
8 #define REG_PHYS_BASE_V7 0x08000000
9 #define REG_VIRT_BASE 0xfc000000
10 #define REG_PHYS_ADDR(x) ((x) + REG_PHY
11 #define REG_PHYS_ADDR_V7(x) ((x) + REG_PHY
12
13 /* Product id can be read from here */
14 #define SUN_TOP_CTRL_BASE REG_PHYS_ADDR(
15 #define SUN_TOP_CTRL_BASE_V7 REG_PHYS_ADDR_
16
17 #define UARTA_3390 REG_PHYS_ADDR(
18 #define UARTA_72116 UARTA_7255
19 #define UARTA_7250 REG_PHYS_ADDR(
20 #define UARTA_7255 REG_PHYS_ADDR(
21 #define UARTA_7260 UARTA_7255
22 #define UARTA_7268 UARTA_7255
23 #define UARTA_7271 UARTA_7268
24 #define UARTA_7278 REG_PHYS_ADDR_
25 #define UARTA_7216 UARTA_7278
26 #define UARTA_72164 UARTA_7278
27 #define UARTA_72165 UARTA_7278
28 #define UARTA_7364 REG_PHYS_ADDR(
29 #define UARTA_7366 UARTA_7364
30 #define UARTA_74165 UARTA_7278
31 #define UARTA_74371 REG_PHYS_ADDR(
32 #define UARTA_7439 REG_PHYS_ADDR(
33 #define UARTA_7445 REG_PHYS_ADDR(
34
35 #define UART_SHIFT 2
36
37 #define checkuart(rp, rv, family_id, family) \
38 /* Load family id */ \
39 ldr rp, =family_id ; \
40 /* Compare SUN_TOP_CTRL value
41 cmp rp, rv ; \
42 /* Passed test, load address *
43 ldreq rp, =UARTA_##family ;
44 /* Jump to save UART address *
45 beq 91f
46
47 .macro addruart, rp, rv, tmp
48 adr \rp, 99f
49 ldr \rv, [\rp]
50 sub \rv, \rv, \rp
51 ldr \rp, [\rp, #4]
52 sub \tmp, \rp, \rv
53 ldr \rp, [\tmp]
54 cmp \rp, #1
55 bne 100f
56 mov \rv, #0
57 str \rv, [\tmp]
58
59 /* Check for V7 memory map if
60 mrc p15, 0, \rv, c0, c0, 0
61 ldr \rp, =ARM_CPU_PART_MAS
62 and \rv, \rv, \rp
63 ldr \rp, =ARM_CPU_PART_BRA
64 cmp \rv, \rp
65 bne 10f
66
67 /* if PERIPHBASE doesn't overl
68 mrc p15, 1, \rv, c15, c3,
69 ands \rv, \rv, #REG_PHYS_BA
70 ldreq \rp, =SUN_TOP_CTRL_BAS
71
72 /* Check SUN_TOP_CTRL base */
73 10: ldrne \rp, =SUN_TOP_CTRL_BAS
74 ldr \rv, [\rp, #0]
75 ARM_BE8( rev \rv, \rv )
76 and \rv, \rv, #0xffffff00
77
78 /* Chip specific detection sta
79 20: checkuart(\rp, \rv, 0x33900000
80 21: checkuart(\rp, \rv, 0x07211600
81 22: checkuart(\rp, \rv, 0x72160000
82 23: checkuart(\rp, \rv, 0x07216400
83 24: checkuart(\rp, \rv, 0x07216500
84 25: checkuart(\rp, \rv, 0x72500000
85 26: checkuart(\rp, \rv, 0x72550000
86 27: checkuart(\rp, \rv, 0x72600000
87 28: checkuart(\rp, \rv, 0x72680000
88 29: checkuart(\rp, \rv, 0x72710000
89 30: checkuart(\rp, \rv, 0x72780000
90 31: checkuart(\rp, \rv, 0x73640000
91 32: checkuart(\rp, \rv, 0x73660000
92 33: checkuart(\rp, \rv, 0x07416500
93 34: checkuart(\rp, \rv, 0x07437100
94 35: checkuart(\rp, \rv, 0x74390000
95 36: checkuart(\rp, \rv, 0x74450000
96
97 /* No valid UART found */
98 90: mov \rp, #0
99 /* fall through */
100
101 /* Record whichever UART we ch
102 91: str \rp, [\tmp, #4]
103 cmp \rp, #0
104 bne 92f
105 str \rp, [\tmp, #8]
106 b 100f
107 92: and \rv, \rp, #0xffffff
108 add \rv, \rv, #REG_VIRT_BA
109 str \rv, [\tmp, #8]
110 b 100f
111
112 .align
113 99: .word .
114 .word brcmstb_uart_config
115 .ltorg
116
117 /* Load previously selected UA
118 100: ldr \rp, [\tmp, #4]
119 ldr \rv, [\tmp, #8]
120 .endm
121
122 .macro store, rd, rx:vararg
123 ARM_BE8( rev \rd, \rd )
124 str \rd, \rx
125 .endm
126
127 .macro load, rd, rx:vararg
128 ldr \rd, \rx
129 ARM_BE8( rev \rd, \rd )
130 .endm
131
132 .macro senduart,rd,rx
133 store \rd, [\rx, #UART_TX <<
134 .endm
135
136 .macro busyuart,rd,rx
137 1002: load \rd, [\rx, #UART_LSR <
138 and \rd, \rd, #UART_LSR_TE
139 teq \rd, #UART_LSR_TEMT |
140 bne 1002b
141 .endm
142
143 .macro waituarttxrdy,rd,rx
144 .endm
145
146 .macro waituartcts,rd,rx
147 .endm
148
149 /*
150 * Storage for the state maintained by the mac
151 *
152 * In the kernel proper, this data is located
153 * That's because this header is included from
154 * want a single copy of the data. In particul
155 * assumes it's running using physical address
156 * is included from head.o, but not when inclu
157 * to share the probe results between the two
158 * to re-run the probing again later.
159 *
160 * In the decompressor, we put the symbol/stor
161 * isn't included in the decompressor build. T
162 * even though it's really data, since .data i
163 * decompressor. Luckily, .text is writeable i
164 * CONFIG_ZBOOT_ROM. That dependency is handle
165 */
166 #if defined(ZIMAGE)
167 brcmstb_uart_config:
168 /* Debug UART initialization required
169 .word 1
170 /* Debug UART physical address */
171 .word 0
172 /* Debug UART virtual address */
173 .word 0
174 #endif
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