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/tegra.h>
27 #include <asm/arch/clock.h>
28 #include <asm/arch/funcmux.h>
29 #include <asm/arch/gpio.h>
30 #include <asm/arch/pinmux.h>
31 #include <asm/arch-tegra/mmc.h>
32 #include <asm/gpio.h>
33 #ifdef CONFIG_TEGRA_MMC
34 #include <mmc.h>
35 #endif
36 
37 /* TODO: Remove this code when the SPI switch is working */
38 #if !defined(CONFIG_SPI_UART_SWITCH) && (CONFIG_MACH_TYPE != MACH_TYPE_VENTANA)
39 void gpio_early_init_uart(void)
40 {
41 	/* Enable UART via GPIO_PI3 (port 8, bit 3) so serial console works */
42 #ifndef CONFIG_SPL_BUILD
43 	gpio_request(GPIO_PI3, NULL);
44 #endif
45 	gpio_direction_output(GPIO_PI3, 0);
46 }
47 #endif
48 
49 #ifdef CONFIG_TEGRA_MMC
50 /*
51  * Routine: pin_mux_mmc
52  * Description: setup the pin muxes/tristate values for the SDMMC(s)
53  */
54 static void pin_mux_mmc(void)
55 {
56 	funcmux_select(PERIPH_ID_SDMMC4, FUNCMUX_SDMMC4_ATB_GMA_GME_8_BIT);
57 	funcmux_select(PERIPH_ID_SDMMC3, FUNCMUX_SDMMC3_SDB_4BIT);
58 
59 	/* For power GPIO PI6 */
60 	pinmux_tristate_disable(PINGRP_ATA);
61 	/* For CD GPIO PI5 */
62 	pinmux_tristate_disable(PINGRP_ATC);
63 }
64 
65 /* this is a weak define that we are overriding */
66 int board_mmc_init(bd_t *bd)
67 {
68 	debug("board_mmc_init called\n");
69 
70 	/* Enable muxes, etc. for SDMMC controllers */
71 	pin_mux_mmc();
72 
73 	debug("board_mmc_init: init eMMC\n");
74 	/* init dev 0, eMMC chip, with 8-bit bus */
75 	tegra_mmc_init(0, 8, -1, -1);
76 
77 	debug("board_mmc_init: init SD slot\n");
78 	/* init dev 1, SD slot, with 4-bit bus */
79 	tegra_mmc_init(1, 4, GPIO_PI6, GPIO_PI5);
80 
81 	return 0;
82 }
83 #endif
84 
85 void pin_mux_usb(void)
86 {
87 	/* For USB's GPIO PD0. For now, since we have no pinmux in fdt */
88 	pinmux_tristate_disable(PINGRP_SLXK);
89 }
90