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Simon Glassb5a5b352011-11-28 15:04:38 +00001/*
2 * Copyright (c) 2011 The Chromium OS Authors.
3 * See file CREDITS for list of people who contributed to this
4 * project.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation; either version 2 of
9 * the License, or (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
19 * MA 02111-1307 USA
20 */
21
22/* Tegra2 high-level function multiplexing */
23
24#ifndef __FUNCMUX_H
25#define __FUNCMUX_H
26
Simon Glass2faf1862012-01-11 12:42:23 +000027/* Configs supported by the func mux */
28enum {
29 FUNCMUX_DEFAULT = 0, /* default config */
30
31 /* UART configs */
32 FUNCMUX_UART1_IRRX_IRTX = 0,
33 FUNCMUX_UART2_IRDA = 0,
34 FUNCMUX_UART4_GMC = 0,
Simon Glass8a1133c2012-01-11 12:42:24 +000035
36 /* I2C configs */
37 FUNCMUX_DVC_I2CP = 0,
38 FUNCMUX_I2C1_RM = 0,
39 FUNCMUX_I2C2_DDC = 0,
40 FUNCMUX_I2C2_PTA,
41 FUNCMUX_I2C3_DTF = 0,
Simon Glasscf06b132012-01-11 12:42:25 +000042
43 /* SDMMC configs */
44 FUNCMUX_SDMMC2_DTA_DTD_8BIT = 0,
45 FUNCMUX_SDMMC3_SDB_4BIT = 0,
46 FUNCMUX_SDMMC3_SDB_SLXA_8BIT,
47 FUNCMUX_SDMMC4_ATC_ATD_8BIT = 0,
48 FUNCMUX_SDMMC4_ATB_GMA_4_BIT,
49 FUNCMUX_SDMMC4_ATB_GMA_GME_8_BIT,
Simon Glass2faf1862012-01-11 12:42:23 +000050};
51
Simon Glassb5a5b352011-11-28 15:04:38 +000052/**
53 * Select a config for a particular peripheral.
54 *
55 * Each peripheral can operate through a number of configurations,
56 * which are sets of pins that it uses to bring out its signals.
57 * The basic config is 0, and higher numbers indicate different
58 * pinmux settings to bring the peripheral out on other pins,
59 *
Simon Glassd6939692012-01-11 12:42:22 +000060 * This function also disables tristate for the function's pins,
61 * so that they operate in normal mode.
62 *
Simon Glassb5a5b352011-11-28 15:04:38 +000063 * @param id Peripheral id
Simon Glass2faf1862012-01-11 12:42:23 +000064 * @param config Configuration to use (FUNCMUX_...), 0 for default
Simon Glassb5a5b352011-11-28 15:04:38 +000065 * @return 0 if ok, -1 on error (e.g. incorrect id or config)
66 */
67int funcmux_select(enum periph_id id, int config);
68
69#endif