1 /*
2  *  (C) Copyright 2010,2011
3  *  NVIDIA Corporation <www.nvidia.com>
4  *  (C) Copyright 2011-2012
5  *  Avionic Design GmbH <www.avionic-design.de>
6  *
7  * See file CREDITS for list of people who contributed to this
8  * project.
9  *
10  * This program is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU General Public License as
12  * published by the Free Software Foundation; either version 2 of
13  * the License, or (at your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
23  * MA 02111-1307 USA
24  */
25 
26 #include <common.h>
27 #include <ns16550.h>
28 #include <asm/io.h>
29 #include <asm/gpio.h>
30 #include <asm/arch/board.h>
31 #include <asm/arch/tegra20.h>
32 #include <asm/arch/sys_proto.h>
33 #include <asm/arch/clk_rst.h>
34 #include <asm/arch/clock.h>
35 #include <asm/arch/funcmux.h>
36 #include <asm/arch/pinmux.h>
37 #include <asm/arch/uart.h>
38 #include <asm/arch/mmc.h>
39 
40 #ifdef CONFIG_TEGRA_MMC
41 #include <mmc.h>
42 #endif
43 
44 /*
45  * Routine: gpio_config_uart
46  * Description: Does nothing on Tamonten - no conflict w/SPI.
47  */
48 void gpio_config_uart(void)
49 {
50 }
51 
52 #ifdef CONFIG_BOARD_EARLY_INIT_F
53 void gpio_early_init(void)
54 {
55 	gpio_request(GPIO_PI4, NULL);
56 	gpio_direction_output(GPIO_PI4, 1);
57 }
58 #endif
59 
60 #ifdef CONFIG_TEGRA_MMC
61 /*
62  * Routine: pin_mux_mmc
63  * Description: setup the pin muxes/tristate values for the SDMMC(s)
64  */
65 static void pin_mux_mmc(void)
66 {
67 	funcmux_select(PERIPH_ID_SDMMC4, FUNCMUX_SDMMC4_ATB_GMA_GME_8_BIT);
68 	/* for write-protect GPIO PI6 */
69 	pinmux_tristate_disable(PINGRP_ATA);
70 	/* for CD GPIO PH2 */
71 	pinmux_tristate_disable(PINGRP_ATD);
72 }
73 
74 /* this is a weak define that we are overriding */
75 int board_mmc_init(bd_t *bd)
76 {
77 	/* Enable muxes, etc. for SDMMC controllers */
78 	pin_mux_mmc();
79 
80 	/* init dev 0, SD slot, with 4-bit bus */
81 	tegra20_mmc_init(0, 4, GPIO_PI6, GPIO_PH2);
82 
83 	return 0;
84 }
85 #endif
86