Merge branch 'master' of git://git.denx.de/u-boot-video
[karo-tx-uboot.git] / arch / arm / cpu / tegra124-common / funcmux.c
1 /*
2  * (C) Copyright 2013
3  * NVIDIA Corporation <www.nvidia.com>
4  *
5  * SPDX-License-Identifier:     GPL-2.0+
6  */
7
8 /* Tegra124 high-level function multiplexing */
9
10 #include <common.h>
11 #include <asm/arch/clock.h>
12 #include <asm/arch/funcmux.h>
13 #include <asm/arch/pinmux.h>
14
15 int funcmux_select(enum periph_id id, int config)
16 {
17         int bad_config = config != FUNCMUX_DEFAULT;
18
19         switch (id) {
20         case PERIPH_ID_UART4:
21                 switch (config) {
22                 case FUNCMUX_UART4_GPIO: /* TXD,RXD,CTS,RTS */
23                         pinmux_set_func(PMUX_PINGRP_PJ7, PMUX_FUNC_UARTD);
24                         pinmux_set_func(PMUX_PINGRP_PB0, PMUX_FUNC_UARTD);
25                         pinmux_set_func(PMUX_PINGRP_PB1, PMUX_FUNC_UARTD);
26                         pinmux_set_func(PMUX_PINGRP_PK7, PMUX_FUNC_UARTD);
27
28                         pinmux_set_io(PMUX_PINGRP_PJ7, PMUX_PIN_OUTPUT);
29                         pinmux_set_io(PMUX_PINGRP_PB0, PMUX_PIN_INPUT);
30                         pinmux_set_io(PMUX_PINGRP_PB1, PMUX_PIN_INPUT);
31                         pinmux_set_io(PMUX_PINGRP_PK7, PMUX_PIN_OUTPUT);
32
33                         pinmux_tristate_disable(PMUX_PINGRP_PJ7);
34                         pinmux_tristate_disable(PMUX_PINGRP_PB0);
35                         pinmux_tristate_disable(PMUX_PINGRP_PB1);
36                         pinmux_tristate_disable(PMUX_PINGRP_PK7);
37                         break;
38                 }
39                 break;
40
41         case PERIPH_ID_UART1:
42                 switch (config) {
43                 case FUNCMUX_UART1_KBC:
44                         pinmux_set_func(PMUX_PINGRP_KB_ROW9_PS1,
45                                         PMUX_FUNC_UARTA);
46                         pinmux_set_func(PMUX_PINGRP_KB_ROW10_PS2,
47                                         PMUX_FUNC_UARTA);
48
49                         pinmux_set_io(PMUX_PINGRP_KB_ROW9_PS1, PMUX_PIN_OUTPUT);
50                         pinmux_set_io(PMUX_PINGRP_KB_ROW10_PS2, PMUX_PIN_INPUT);
51
52                         pinmux_tristate_disable(PMUX_PINGRP_KB_ROW9_PS1);
53                         pinmux_tristate_disable(PMUX_PINGRP_KB_ROW10_PS2);
54                         break;
55                 }
56                 break;
57
58         /* Add other periph IDs here as needed */
59
60         default:
61                 debug("%s: invalid periph_id %d", __func__, id);
62                 return -1;
63         }
64
65         if (bad_config) {
66                 debug("%s: invalid config %d for periph_id %d", __func__,
67                       config, id);
68                 return -1;
69         }
70         return 0;
71 }