1 /*
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 /* Tegra20 high-level function multiplexing */
23 
24 #ifndef __FUNCMUX_H
25 #define __FUNCMUX_H
26 
27 /* Configs supported by the func mux */
28 enum {
29 	FUNCMUX_DEFAULT = 0,	/* default config */
30 
31 	/* UART configs */
32 	FUNCMUX_UART1_IRRX_IRTX = 0,
33 	FUNCMUX_UART1_UAA_UAB,
34 	FUNCMUX_UART1_GPU,
35 	FUNCMUX_UART1_SDIO1,
36 	FUNCMUX_UART2_IRDA = 0,
37 	FUNCMUX_UART4_GMC = 0,
38 
39 	/* I2C configs */
40 	FUNCMUX_DVC_I2CP = 0,
41 	FUNCMUX_I2C1_RM = 0,
42 	FUNCMUX_I2C2_DDC = 0,
43 	FUNCMUX_I2C2_PTA,
44 	FUNCMUX_I2C3_DTF = 0,
45 
46 	/* SDMMC configs */
47 	FUNCMUX_SDMMC1_SDIO1_4BIT = 0,
48 	FUNCMUX_SDMMC2_DTA_DTD_8BIT = 0,
49 	FUNCMUX_SDMMC3_SDB_4BIT = 0,
50 	FUNCMUX_SDMMC3_SDB_SLXA_8BIT,
51 	FUNCMUX_SDMMC4_ATC_ATD_8BIT = 0,
52 	FUNCMUX_SDMMC4_ATB_GMA_4_BIT,
53 	FUNCMUX_SDMMC4_ATB_GMA_GME_8_BIT,
54 
55 	/* USB configs */
56 	FUNCMUX_USB2_ULPI = 0,
57 
58 	/* Serial Flash configs */
59 	FUNCMUX_SPI1_GMC_GMD = 0,
60 };
61 
62 /**
63  * Select a config for a particular peripheral.
64  *
65  * Each peripheral can operate through a number of configurations,
66  * which are sets of pins that it uses to bring out its signals.
67  * The basic config is 0, and higher numbers indicate different
68  * pinmux settings to bring the peripheral out on other pins,
69  *
70  * This function also disables tristate for the function's pins,
71  * so that they operate in normal mode.
72  *
73  * @param id		Peripheral id
74  * @param config	Configuration to use (FUNCMUX_...), 0 for default
75  * @return 0 if ok, -1 on error (e.g. incorrect id or config)
76  */
77 int funcmux_select(enum periph_id id, int config);
78 
79 #endif
80