1 /*
2  *  (C) Copyright 2010,2011
3  *  NVIDIA Corporation <www.nvidia.com>
4  *
5  * See file CREDITS for list of people who contributed to this
6  * project.
7  *
8  * This program is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License as
10  * published by the Free Software Foundation; either version 2 of
11  * the License, or (at your option) any later version.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21  * MA 02111-1307 USA
22  */
23 
24 #include <common.h>
25 #include <asm/io.h>
26 #include <asm/arch/tegra2.h>
27 #include <asm/arch/pinmux.h>
28 #include <asm/gpio.h>
29 #ifdef CONFIG_TEGRA2_MMC
30 #include <mmc.h>
31 #endif
32 #include "../common/board.h"
33 
34 /*
35  * Routine: gpio_config_uart_seaboard
36  * Description: Force GPIO_PI3 low on Seaboard so UART4 works.
37  */
38 static void gpio_config_uart_seaboard(void)
39 {
40 	/* Enable UART via GPIO_PI3 (port 8, bit 3) so serial console works */
41 	gpio_request(GPIO_PI3, NULL);
42 	gpio_direction_output(GPIO_PI3, 0);
43 }
44 
45 void gpio_config_uart(void)
46 {
47 	if (machine_is_ventana())
48 		return;
49 	gpio_config_uart_seaboard();
50 }
51 
52 #ifdef CONFIG_TEGRA2_MMC
53 /*
54  * Routine: pin_mux_mmc
55  * Description: setup the pin muxes/tristate values for the SDMMC(s)
56  */
57 static void pin_mux_mmc(void)
58 {
59 	/* SDMMC4: config 3, x8 on 2nd set of pins */
60 	pinmux_set_func(PINGRP_ATB, PMUX_FUNC_SDIO4);
61 	pinmux_set_func(PINGRP_GMA, PMUX_FUNC_SDIO4);
62 	pinmux_set_func(PINGRP_GME, PMUX_FUNC_SDIO4);
63 
64 	pinmux_tristate_disable(PINGRP_ATB);
65 	pinmux_tristate_disable(PINGRP_GMA);
66 	pinmux_tristate_disable(PINGRP_GME);
67 
68 	/* SDMMC3: SDIO3_CLK, SDIO3_CMD, SDIO3_DAT[3:0] */
69 	pinmux_set_func(PINGRP_SDB, PMUX_FUNC_SDIO3);
70 	pinmux_set_func(PINGRP_SDC, PMUX_FUNC_SDIO3);
71 	pinmux_set_func(PINGRP_SDD, PMUX_FUNC_SDIO3);
72 
73 	pinmux_tristate_disable(PINGRP_SDC);
74 	pinmux_tristate_disable(PINGRP_SDD);
75 	pinmux_tristate_disable(PINGRP_SDB);
76 
77 	/* For power GPIO PI6 */
78 	pinmux_tristate_disable(PINGRP_ATA);
79 	/* For CD GPIO PI5 */
80 	pinmux_tristate_disable(PINGRP_ATC);
81 }
82 
83 /* this is a weak define that we are overriding */
84 int board_mmc_init(bd_t *bd)
85 {
86 	debug("board_mmc_init called\n");
87 
88 	/* Enable muxes, etc. for SDMMC controllers */
89 	pin_mux_mmc();
90 
91 	debug("board_mmc_init: init eMMC\n");
92 	/* init dev 0, eMMC chip, with 4-bit bus */
93 	/* The board has an 8-bit bus, but 8-bit doesn't work yet */
94 	tegra2_mmc_init(0, 4, -1, -1);
95 
96 	debug("board_mmc_init: init SD slot\n");
97 	/* init dev 1, SD slot, with 4-bit bus */
98 	tegra2_mmc_init(1, 4, GPIO_PI6, GPIO_PI5);
99 
100 	return 0;
101 }
102 #endif
103