1 /*
2 * Copyright (c) 2019, NXP. All rights reserved.
3 *
4 * SPDX-License-Identifier: BSD-3-Clause
5 */
6
7 #include <errno.h>
8
9 #include <lib/mmio.h>
10
11 #include <imx_rdc.h>
12
13 struct imx_uart {
14 int index;
15 unsigned int uart_base;
16 };
17
18 static const struct imx_uart imx8m_uart_info[] = {
19 { /* UART 1 */
20 .index = RDC_PDAP_UART1,
21 .uart_base = IMX_UART1_BASE,
22 }, { /* UART 2 */
23 .index = RDC_PDAP_UART2,
24 .uart_base = IMX_UART2_BASE,
25 }, { /* UART 3 */
26 .index = RDC_PDAP_UART3,
27 .uart_base = IMX_UART3_BASE,
28 }, { /* UART 4 */
29 .index = RDC_PDAP_UART4,
30 .uart_base = IMX_UART4_BASE,
31 }
32 };
33
imx_rdc_uart_get_pdap_index(unsigned int uart_base)34 static int imx_rdc_uart_get_pdap_index(unsigned int uart_base)
35 {
36 size_t i;
37
38 for (i = 0; i < ARRAY_SIZE(imx8m_uart_info); i++) {
39 if (imx8m_uart_info[i].uart_base == uart_base) {
40 return imx8m_uart_info[i].index;
41 }
42 }
43
44 return -ENODEV;
45 }
46
imx_rdc_console_access_enable(struct imx_rdc_cfg * rdc_cfg,unsigned int console_base)47 static void imx_rdc_console_access_enable(struct imx_rdc_cfg *rdc_cfg,
48 unsigned int console_base)
49 {
50 struct imx_rdc_cfg *rdc;
51 int console_pdap_index;
52
53 console_pdap_index = imx_rdc_uart_get_pdap_index(console_base);
54 if (console_pdap_index < 0) {
55 return;
56 }
57
58 for (rdc = rdc_cfg; rdc->type != RDC_INVALID; rdc++) {
59 if (rdc->type != RDC_PDAP || rdc->index != console_pdap_index) {
60 continue;
61 }
62
63 if (rdc->index == console_pdap_index) {
64 rdc->setting.rdc_pdap = D0R | D0W;
65 return;
66 }
67 }
68 }
69
imx_rdc_init(struct imx_rdc_cfg * rdc_cfg,unsigned int console_base)70 void imx_rdc_init(struct imx_rdc_cfg *rdc_cfg, unsigned int console_base)
71 {
72 struct imx_rdc_cfg *rdc = rdc_cfg;
73
74 imx_rdc_console_access_enable(rdc, console_base);
75
76 while (rdc->type != RDC_INVALID) {
77 switch (rdc->type) {
78 case RDC_MDA:
79 /* MDA config */
80 mmio_write_32(MDAn(rdc->index), rdc->setting.rdc_mda);
81 break;
82 case RDC_PDAP:
83 /* peripheral access permission config */
84 mmio_write_32(PDAPn(rdc->index), rdc->setting.rdc_pdap);
85 break;
86 case RDC_MEM_REGION:
87 /* memory region access permission config */
88 mmio_write_32(MRSAn(rdc->index), rdc->setting.rdc_mem_region[0]);
89 mmio_write_32(MREAn(rdc->index), rdc->setting.rdc_mem_region[1]);
90 mmio_write_32(MRCn(rdc->index), rdc->setting.rdc_mem_region[2]);
91 break;
92 default:
93 break;
94 }
95
96 rdc++;
97 }
98 }
99