1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
/*
* (C) Copyright 2010,2011
* NVIDIA Corporation <www.nvidia.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/tegra2.h>
#include <asm/arch/pinmux.h>
#include <asm/gpio.h>
#ifdef CONFIG_TEGRA2_MMC
#include <mmc.h>
#endif
#include "../common/board.h"
/*
* Routine: gpio_config_uart
* Description: Force GPIO_PI3 low on Seaboard so UART4 works.
*/
void gpio_config_uart(void)
{
int gp = GPIO_PI3;
struct gpio_ctlr *gpio = (struct gpio_ctlr *)NV_PA_GPIO_BASE;
struct gpio_ctlr_bank *bank = &gpio->gpio_bank[GPIO_BANK(gp)];
u32 val;
/* Enable UART via GPIO_PI3 (port 8, bit 3) so serial console works */
val = readl(&bank->gpio_config[GPIO_PORT(gp)]);
val |= 1 << GPIO_BIT(gp);
writel(val, &bank->gpio_config[GPIO_PORT(gp)]);
val = readl(&bank->gpio_out[GPIO_PORT(gp)]);
val &= ~(1 << GPIO_BIT(gp));
writel(val, &bank->gpio_out[GPIO_PORT(gp)]);
val = readl(&bank->gpio_dir_out[GPIO_PORT(gp)]);
val |= 1 << GPIO_BIT(gp);
writel(val, &bank->gpio_dir_out[GPIO_PORT(gp)]);
}
#ifdef CONFIG_TEGRA2_MMC
/*
* Routine: pin_mux_mmc
* Description: setup the pin muxes/tristate values for the SDMMC(s)
*/
static void pin_mux_mmc(void)
{
/* SDMMC4: config 3, x8 on 2nd set of pins */
pinmux_set_func(PINGRP_ATB, PMUX_FUNC_SDIO4);
pinmux_set_func(PINGRP_GMA, PMUX_FUNC_SDIO4);
pinmux_set_func(PINGRP_GME, PMUX_FUNC_SDIO4);
pinmux_tristate_disable(PINGRP_ATB);
pinmux_tristate_disable(PINGRP_GMA);
pinmux_tristate_disable(PINGRP_GME);
/* SDMMC3: SDIO3_CLK, SDIO3_CMD, SDIO3_DAT[3:0] */
pinmux_set_func(PINGRP_SDB, PMUX_FUNC_SDIO3);
pinmux_set_func(PINGRP_SDC, PMUX_FUNC_SDIO3);
pinmux_set_func(PINGRP_SDD, PMUX_FUNC_SDIO3);
pinmux_tristate_disable(PINGRP_SDC);
pinmux_tristate_disable(PINGRP_SDD);
pinmux_tristate_disable(PINGRP_SDB);
/* For power GPIO PI6 */
pinmux_tristate_disable(PINGRP_ATA);
/* For CD GPIO PI5 */
pinmux_tristate_disable(PINGRP_ATC);
}
/*
* Routine: gpio_config_mmc
* Description: Set GPIOs for SDMMC3 SDIO slot.
*/
void gpio_config_mmc(void)
{
/* Set EN_VDDIO_SD (GPIO I6) */
gpio_direction_output(GPIO_PI6, 1);
/* Config pin as GPI for Card Detect (GPIO I5) */
gpio_direction_input(GPIO_PI5);
}
/* this is a weak define that we are overriding */
int board_mmc_init(bd_t *bd)
{
debug("board_mmc_init called\n");
/* Enable muxes, etc. for SDMMC controllers */
pin_mux_mmc();
gpio_config_mmc();
debug("board_mmc_init: init eMMC\n");
/* init dev 0, eMMC chip, with 4-bit bus */
/* The board has an 8-bit bus, but 8-bit doesn't work yet */
tegra2_mmc_init(0, 4);
debug("board_mmc_init: init SD slot\n");
/* init dev 1, SD slot, with 4-bit bus */
tegra2_mmc_init(1, 4);
return 0;
}
/* this is a weak define that we are overriding */
int board_mmc_getcd(u8 *cd, struct mmc *mmc)
{
debug("board_mmc_getcd called\n");
*cd = 1; /* Assume card is inserted, or eMMC */
if (IS_SD(mmc)) {
/* Seaboard SDMMC3 = SDIO3_CD = GPIO_PI5 */
if (gpio_get_value(GPIO_PI5))
*cd = 0;
}
return 0;
}
#endif
|
