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/clock.h>
28 #include <asm/arch/funcmux.h>
29 #include <asm/arch/pinmux.h>
30 #include <asm/arch/mmc.h>
31 #include <asm/gpio.h>
32 #ifdef CONFIG_TEGRA2_MMC
33 #include <mmc.h>
34 #endif
35 
36 /* TODO: Remove this code when the SPI switch is working */
37 #ifndef CONFIG_SPI_UART_SWITCH
38 /*
39  * Routine: gpio_config_uart_seaboard
40  * Description: Force GPIO_PI3 low on Seaboard so UART4 works.
41  */
42 static void gpio_config_uart_seaboard(void)
43 {
44 	/* Enable UART via GPIO_PI3 (port 8, bit 3) so serial console works */
45 	gpio_request(GPIO_PI3, NULL);
46 	gpio_direction_output(GPIO_PI3, 0);
47 }
48 
49 void gpio_config_uart(void)
50 {
51 	if (machine_is_ventana())
52 		return;
53 	gpio_config_uart_seaboard();
54 }
55 #endif
56 
57 #ifdef CONFIG_TEGRA2_MMC
58 /*
59  * Routine: pin_mux_mmc
60  * Description: setup the pin muxes/tristate values for the SDMMC(s)
61  */
62 static void pin_mux_mmc(void)
63 {
64 	funcmux_select(PERIPH_ID_SDMMC4, FUNCMUX_SDMMC4_ATB_GMA_GME_8_BIT);
65 	funcmux_select(PERIPH_ID_SDMMC3, FUNCMUX_SDMMC3_SDB_4BIT);
66 
67 	/* For power GPIO PI6 */
68 	pinmux_tristate_disable(PINGRP_ATA);
69 	/* For CD GPIO PI5 */
70 	pinmux_tristate_disable(PINGRP_ATC);
71 }
72 
73 /* this is a weak define that we are overriding */
74 int board_mmc_init(bd_t *bd)
75 {
76 	debug("board_mmc_init called\n");
77 
78 	/* Enable muxes, etc. for SDMMC controllers */
79 	pin_mux_mmc();
80 
81 	debug("board_mmc_init: init eMMC\n");
82 	/* init dev 0, eMMC chip, with 4-bit bus */
83 	/* The board has an 8-bit bus, but 8-bit doesn't work yet */
84 	tegra2_mmc_init(0, 4, -1, -1);
85 
86 	debug("board_mmc_init: init SD slot\n");
87 	/* init dev 1, SD slot, with 4-bit bus */
88 	tegra2_mmc_init(1, 4, GPIO_PI6, GPIO_PI5);
89 
90 	return 0;
91 }
92 #endif
93 
94 void pin_mux_usb(void)
95 {
96 	/* For USB's GPIO PD0. For now, since we have no pinmux in fdt */
97 	pinmux_tristate_disable(PINGRP_SLXK);
98 }
99