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 */ 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 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 102 103 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