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1 /*
2  * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
3  *
4  * SPDX-License-Identifier: BSD-3-Clause
5  */
6 
7 #ifndef IMX8_LPUART_H
8 #define IMX8_LPUART_H
9 
10 #include <drivers/console.h>
11 
12 #define VERID	0x0
13 #define PARAM	0x4
14 #define GLOBAL	0x8
15 #define PINCFG	0xC
16 #define BAUD	0x10
17 #define STAT	0x14
18 #define CTRL	0x18
19 #define DATA	0x1C
20 #define MATCH	0x20
21 #define MODIR	0x24
22 #define FIFO	0x28
23 #define WATER	0x2c
24 
25 #define US1_TDRE	(1 << 23)
26 #define US1_RDRF	(1 << 21)
27 
28 #define CTRL_TE		(1 << 19)
29 #define CTRL_RE		(1 << 18)
30 
31 #define FIFO_TXFE	0x80
32 #define FIFO_RXFE	0x40
33 
34 #define WATER_TXWATER_OFF	1
35 #define WATER_RXWATER_OFF	16
36 
37 #define LPUART_CTRL_PT_MASK	0x1
38 #define LPUART_CTRL_PE_MASK	0x2
39 #define LPUART_CTRL_M_MASK	0x10
40 
41 #define LPUART_BAUD_OSR_MASK                     (0x1F000000U)
42 #define LPUART_BAUD_OSR_SHIFT                    (24U)
43 #define LPUART_BAUD_OSR(x)                       (((uint32_t)(((uint32_t)(x)) << LPUART_BAUD_OSR_SHIFT)) & LPUART_BAUD_OSR_MASK)
44 
45 #define LPUART_BAUD_SBR_MASK                     (0x1FFFU)
46 #define LPUART_BAUD_SBR_SHIFT                    (0U)
47 #define LPUART_BAUD_SBR(x)                       (((uint32_t)(((uint32_t)(x)) << LPUART_BAUD_SBR_SHIFT)) & LPUART_BAUD_SBR_MASK)
48 
49 #define LPUART_BAUD_SBNS_MASK                    (0x2000U)
50 #define LPUART_BAUD_BOTHEDGE_MASK                (0x20000U)
51 #define LPUART_BAUD_M10_MASK                     (0x20000000U)
52 
53 #ifndef __ASSEMBLER__
54 
55 #include <stdint.h>
56 
57 typedef struct {
58 	console_t console;
59 	uintptr_t base;
60 } console_lpuart_t;
61 
62 int console_lpuart_register(uintptr_t baseaddr, uint32_t clock, uint32_t baud,
63 			   console_lpuart_t *console);
64 #endif /*__ASSEMBLER__*/
65 
66 #endif /* IMX8_LPUART_H */
67