xref: /openbmc/u-boot/board/pandora/pandora.c (revision ee52b188)
1 /*
2  * (C) Copyright 2008
3  * Grazvydas Ignotas <notasas@gmail.com>
4  *
5  * Derived from Beagle Board, 3430 SDP, and OMAP3EVM code by
6  *	Richard Woodruff <r-woodruff2@ti.com>
7  *	Syed Mohammed Khasim <khasim@ti.com>
8  *	Sunil Kumar <sunilsaini05@gmail.com>
9  *	Shashi Ranjan <shashiranjanmca05@gmail.com>
10  *
11  * (C) Copyright 2004-2008
12  * Texas Instruments, <www.ti.com>
13  *
14  * See file CREDITS for list of people who contributed to this
15  * project.
16  *
17  * This program is free software; you can redistribute it and/or
18  * modify it under the terms of the GNU General Public License as
19  * published by the Free Software Foundation; either version 2 of
20  * the License, or (at your option) any later version.
21  *
22  * This program is distributed in the hope that it will be useful,
23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
25  * GNU General Public License for more details.
26  *
27  * You should have received a copy of the GNU General Public License
28  * along with this program; if not, write to the Free Software
29  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
30  * MA 02111-1307 USA
31  */
32 #include <common.h>
33 #include <twl4030.h>
34 #include <asm/io.h>
35 #include <asm/gpio.h>
36 #include <asm/arch/mmc_host_def.h>
37 #include <asm/arch/mux.h>
38 #include <asm/arch/gpio.h>
39 #include <asm/arch/sys_proto.h>
40 #include <asm/mach-types.h>
41 #include "pandora.h"
42 
43 DECLARE_GLOBAL_DATA_PTR;
44 
45 #define TWL4030_BB_CFG_BBCHEN		(1 << 4)
46 #define TWL4030_BB_CFG_BBSEL_3200MV	(3 << 2)
47 #define TWL4030_BB_CFG_BBISEL_500UA	2
48 
49 #define CONTROL_WKUP_CTRL		0x48002a5c
50 #define GPIO_IO_PWRDNZ			(1 << 6)
51 #define PBIASLITEVMODE1			(1 << 8)
52 
53 /*
54  * Routine: board_init
55  * Description: Early hardware init.
56  */
57 int board_init(void)
58 {
59 	gpmc_init(); /* in SRAM or SDRAM, finish GPMC */
60 	/* board id for Linux */
61 	gd->bd->bi_arch_number = MACH_TYPE_OMAP3_PANDORA;
62 	/* boot param addr */
63 	gd->bd->bi_boot_params = (OMAP34XX_SDRC_CS0 + 0x100);
64 
65 	return 0;
66 }
67 
68 static void set_output_gpio(unsigned int gpio, int value)
69 {
70 	int ret;
71 
72 	ret = gpio_request(gpio, "");
73 	if (ret != 0) {
74 		printf("could not request GPIO %u\n", gpio);
75 		return;
76 	}
77 	ret = gpio_direction_output(gpio, value);
78 	if (ret != 0)
79 		printf("could not set GPIO %u to %d\n", gpio, value);
80 }
81 
82 /*
83  * Routine: misc_init_r
84  * Description: Configure board specific parts
85  */
86 int misc_init_r(void)
87 {
88 	t2_t *t2_base = (t2_t *)T2_BASE;
89 	u32 pbias_lite;
90 
91 	twl4030_led_init(TWL4030_LED_LEDEN_LEDBON);
92 
93 	/* set up dual-voltage GPIOs to 1.8V */
94 	pbias_lite = readl(&t2_base->pbias_lite);
95 	pbias_lite &= ~PBIASLITEVMODE1;
96 	pbias_lite |= PBIASLITEPWRDNZ1;
97 	writel(pbias_lite, &t2_base->pbias_lite);
98 	if (get_cpu_family() == CPU_OMAP36XX)
99 		writel(readl(CONTROL_WKUP_CTRL) | GPIO_IO_PWRDNZ,
100 			CONTROL_WKUP_CTRL);
101 
102 	/* make sure audio and BT chips are in powerdown state */
103 	set_output_gpio(14, 0);
104 	set_output_gpio(15, 0);
105 	set_output_gpio(118, 0);
106 
107 	/* enable USB supply */
108 	set_output_gpio(164, 1);
109 
110 	/* wifi needs a short pulse to enter powersave state */
111 	set_output_gpio(23, 1);
112 	udelay(5000);
113 	gpio_direction_output(23, 0);
114 
115 	/* Enable battery backup capacitor (3.2V, 0.5mA charge current) */
116 	twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER,
117 		TWL4030_BB_CFG_BBCHEN | TWL4030_BB_CFG_BBSEL_3200MV |
118 		TWL4030_BB_CFG_BBISEL_500UA, TWL4030_PM_RECEIVER_BB_CFG);
119 
120 	dieid_num_r();
121 
122 	return 0;
123 }
124 
125 /*
126  * Routine: set_muxconf_regs
127  * Description: Setting up the configuration Mux registers specific to the
128  *		hardware. Many pins need to be moved from protect to primary
129  *		mode.
130  */
131 void set_muxconf_regs(void)
132 {
133 	MUX_PANDORA();
134 	if (get_cpu_family() == CPU_OMAP36XX) {
135 		MUX_PANDORA_3730();
136 	}
137 }
138 
139 #ifdef CONFIG_GENERIC_MMC
140 int board_mmc_init(bd_t *bis)
141 {
142 	omap_mmc_init(0, 0, 0);
143 	return 0;
144 }
145 #endif
146