drivers/power/twl4030.c

   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 }