1 /*
2  * Copyright (c) 2010-2013, NVIDIA CORPORATION.  All rights reserved.
3  *
4  * This program is free software; you can redistribute it and/or modify it
5  * under the terms and conditions of the GNU General Public License,
6  * version 2, as published by the Free Software Foundation.
7  *
8  * This program is distributed in the hope it will be useful, but WITHOUT
9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
11  * more details.
12  *
13  * You should have received a copy of the GNU General Public License
14  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
15  */
16 
17 /* Tegra114 high-level function multiplexing */
18 
19 #include <common.h>
20 #include <asm/arch/clock.h>
21 #include <asm/arch/funcmux.h>
22 #include <asm/arch/pinmux.h>
23 
24 int funcmux_select(enum periph_id id, int config)
25 {
26 	int bad_config = config != FUNCMUX_DEFAULT;
27 
28 	switch (id) {
29 	case PERIPH_ID_UART4:
30 		switch (config) {
31 		case FUNCMUX_UART4_GMI:
32 			pinmux_set_func(PMUX_PINGRP_GMI_A16_PJ7,
33 					PMUX_FUNC_UARTD);
34 			pinmux_set_func(PMUX_PINGRP_GMI_A17_PB0,
35 					PMUX_FUNC_UARTD);
36 			pinmux_set_func(PMUX_PINGRP_GMI_A18_PB1,
37 					PMUX_FUNC_UARTD);
38 			pinmux_set_func(PMUX_PINGRP_GMI_A19_PK7,
39 					PMUX_FUNC_UARTD);
40 
41 			pinmux_set_io(PMUX_PINGRP_GMI_A16_PJ7, PMUX_PIN_OUTPUT);
42 			pinmux_set_io(PMUX_PINGRP_GMI_A17_PB0, PMUX_PIN_INPUT);
43 			pinmux_set_io(PMUX_PINGRP_GMI_A18_PB1, PMUX_PIN_INPUT);
44 			pinmux_set_io(PMUX_PINGRP_GMI_A19_PK7, PMUX_PIN_OUTPUT);
45 
46 			pinmux_tristate_disable(PMUX_PINGRP_GMI_A16_PJ7);
47 			pinmux_tristate_disable(PMUX_PINGRP_GMI_A17_PB0);
48 			pinmux_tristate_disable(PMUX_PINGRP_GMI_A18_PB1);
49 			pinmux_tristate_disable(PMUX_PINGRP_GMI_A19_PK7);
50 			break;
51 		}
52 		break;
53 
54 	/* Add other periph IDs here as needed */
55 
56 	default:
57 		debug("%s: invalid periph_id %d", __func__, id);
58 		return -1;
59 	}
60 
61 	if (bad_config) {
62 		debug("%s: invalid config %d for periph_id %d", __func__,
63 		      config, id);
64 		return -1;
65 	}
66 	return 0;
67 }
68