| Tom Warren | 8981bff | 2014-01-24 12:46:15 -0700 | [diff] [blame] | 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(PINGRP_GPIO_PJ7, PMUX_FUNC_UARTD); |
| 24 | pinmux_set_func(PINGRP_GPIO_PB0, PMUX_FUNC_UARTD); |
| 25 | pinmux_set_func(PINGRP_GPIO_PB1, PMUX_FUNC_UARTD); |
| 26 | pinmux_set_func(PINGRP_GPIO_PK7, PMUX_FUNC_UARTD); |
| 27 | |
| 28 | pinmux_set_io(PINGRP_GPIO_PJ7, PMUX_PIN_OUTPUT); |
| 29 | pinmux_set_io(PINGRP_GPIO_PB0, PMUX_PIN_INPUT); |
| 30 | pinmux_set_io(PINGRP_GPIO_PB1, PMUX_PIN_INPUT); |
| 31 | pinmux_set_io(PINGRP_GPIO_PK7, PMUX_PIN_OUTPUT); |
| 32 | |
| 33 | pinmux_tristate_disable(PINGRP_GPIO_PJ7); |
| 34 | pinmux_tristate_disable(PINGRP_GPIO_PB0); |
| 35 | pinmux_tristate_disable(PINGRP_GPIO_PB1); |
| 36 | pinmux_tristate_disable(PINGRP_GPIO_PK7); |
| 37 | break; |
| 38 | } |
| 39 | break; |
| 40 | |
| 41 | case PERIPH_ID_UART1: |
| 42 | switch (config) { |
| 43 | case FUNCMUX_UART1_KBC: |
| 44 | pinmux_set_func(PINGRP_KB_ROW9, PMUX_FUNC_UARTA); |
| 45 | pinmux_set_func(PINGRP_KB_ROW10, PMUX_FUNC_UARTA); |
| 46 | |
| 47 | pinmux_set_io(PINGRP_KB_ROW9, PMUX_PIN_OUTPUT); |
| 48 | pinmux_set_io(PINGRP_KB_ROW10, PMUX_PIN_INPUT); |
| 49 | |
| 50 | pinmux_tristate_disable(PINGRP_KB_ROW9); |
| 51 | pinmux_tristate_disable(PINGRP_KB_ROW10); |
| 52 | break; |
| 53 | } |
| 54 | break; |
| 55 | |
| 56 | /* Add other periph IDs here as needed */ |
| 57 | |
| 58 | default: |
| 59 | debug("%s: invalid periph_id %d", __func__, id); |
| 60 | return -1; |
| 61 | } |
| 62 | |
| 63 | if (bad_config) { |
| 64 | debug("%s: invalid config %d for periph_id %d", __func__, |
| 65 | config, id); |
| 66 | return -1; |
| 67 | } |
| 68 | return 0; |
| 69 | } |