1 /*
2 * Copyright (c) 2009 Wind River Systems, Inc.
3 * Tom Rix <Tom.Rix at windriver.com>
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation; either version 2 of
8 * the License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
18 * MA 02111-1307 USA
19 *
20 * twl4030_power_reset_init is derived from code on omapzoom,
21 * git://git.omapzoom.com/repo/u-boot.git
22 *
23 * Copyright (C) 2007-2009 Texas Instruments, Inc.
24 *
25 * twl4030_power_init is from cpu/omap3/common.c, power_init_r
26 *
27 * (C) Copyright 2004-2008
28 * Texas Instruments, <www.ti.com>
29 *
30 * Author :
31 * Sunil Kumar <sunilsaini05 at gmail.com>
32 * Shashi Ranjan <shashiranjanmca05 at gmail.com>
33 *
34 * Derived from Beagle Board and 3430 SDP code by
35 * Richard Woodruff <r-woodruff2 at ti.com>
36 * Syed Mohammed Khasim <khasim at ti.com>
37 *
38 */
39
40 #include <twl4030.h>
41
42 /*
43 * Power Reset
44 */
twl4030_power_reset_init(void)45 void twl4030_power_reset_init(void)
46 {
47 u8 val = 0;
48 if (twl4030_i2c_read_u8(TWL4030_CHIP_PM_MASTER, &val,
49 TWL4030_PM_MASTER_P1_SW_EVENTS)) {
50 printf("Error:TWL4030: failed to read the power register\n");
51 printf("Could not initialize hardware reset\n");
52 } else {
53 val |= TWL4030_PM_MASTER_SW_EVENTS_STOPON_PWRON;
54 if (twl4030_i2c_write_u8(TWL4030_CHIP_PM_MASTER, val,
55 TWL4030_PM_MASTER_P1_SW_EVENTS)) {
56 printf("Error:TWL4030: failed to write the power register\n");
57 printf("Could not initialize hardware reset\n");
58 }
59 }
60 }
61
62
63 /*
64 * Power Init
65 */
66 #define DEV_GRP_P1 0x20
67 #define VAUX3_VSEL_28 0x03
68 #define DEV_GRP_ALL 0xE0
69 #define VPLL2_VSEL_18 0x05
70 #define VDAC_VSEL_18 0x03
71
twl4030_power_init(void)72 void twl4030_power_init(void)
73 {
74 unsigned char byte;
75
76 /* set VAUX3 to 2.8V */
77 byte = DEV_GRP_P1;
78 twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, byte,
79 TWL4030_PM_RECEIVER_VAUX3_DEV_GRP);
80 byte = VAUX3_VSEL_28;
81 twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, byte,
82 TWL4030_PM_RECEIVER_VAUX3_DEDICATED);
83
84 /* set VPLL2 to 1.8V */
85 byte = DEV_GRP_ALL;
86 twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, byte,
87 TWL4030_PM_RECEIVER_VPLL2_DEV_GRP);
88 byte = VPLL2_VSEL_18;
89 twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, byte,
90 TWL4030_PM_RECEIVER_VPLL2_DEDICATED);
91
92 /* set VDAC to 1.8V */
93 byte = DEV_GRP_P1;
94 twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, byte,
95 TWL4030_PM_RECEIVER_VDAC_DEV_GRP);
96 byte = VDAC_VSEL_18;
97 twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, byte,
98 TWL4030_PM_RECEIVER_VDAC_DEDICATED);
99 }
100
101 #define VMMC1_VSEL_30 0x02
102
twl4030_power_mmc_init(void)103 void twl4030_power_mmc_init(void)
104 {
105 unsigned char byte;
106
107 byte = DEV_GRP_P1;
108 twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, byte,
109 TWL4030_PM_RECEIVER_VMMC1_DEV_GRP);
110
111 /* 3 Volts */
112 byte = VMMC1_VSEL_30;
113 twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER, byte,
114 TWL4030_PM_RECEIVER_VMMC1_DEDICATED);
115 }
116