board/corscience/tricorder/tricorder.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2012
   4  * Corscience GmbH & Co. KG, <www.corscience.de>
   5  * Thomas Weber <weber@corscience.de>
   6  * Sunil Kumar <sunilsaini05@gmail.com>
   7  * Shashi Ranjan <shashiranjanmca05@gmail.com>
   8  *
   9  * Derived from Devkit8000 code by
  10  * Frederik Kriewitz <frederik@kriewitz.eu>
  11  */
  12 #include <common.h>
  13 #include <malloc.h>
  14 #include <twl4030.h>
  15 #include <status_led.h>
  16 #include <asm/io.h>
  17 #include <asm/gpio.h>
  18 #include <asm/arch/mmc_host_def.h>
  19 #include <asm/arch/mux.h>
  20 #include <asm/arch/sys_proto.h>
  21 #include <asm/arch/mem.h>
  22 #include "tricorder.h"
  23 #include "tricorder-eeprom.h"
  24
  25 DECLARE_GLOBAL_DATA_PTR;
  26
  27 /*
  28  * Routine: board_init
  29  * Description: Early hardware init.
  30  */
  31 int board_init(void)
  32 {
  33         gpmc_init(); /* in SRAM or SDRAM, finish GPMC */
  34         /* boot param addr */
  35         gd->bd->bi_boot_params = (OMAP34XX_SDRC_CS0 + 0x100);
  36
  37         return 0;
  38 }
  39
  40 /**
  41  * get_eeprom - read the eeprom
  42  *
  43  * @eeprom - pointer to a eeprom struct to fill
  44  *
  45  * This function will panic() on wrong EEPROM content
  46  */
  47 static void get_eeprom(struct tricorder_eeprom *eeprom)
  48 {
  49         int ret;
  50
  51         if (!eeprom)
  52                 panic("No eeprom given!\n");
  53
  54         ret = gpio_request(7, "BMS");
  55         if (ret)
  56                 panic("gpio: requesting BMS pin failed\n");
  57
  58         ret = gpio_direction_input(7);
  59         if (ret)
  60                 panic("gpio: set BMS as input failed\n");
  61
  62         ret = gpio_get_value(7);
  63         if (ret < 0)
  64                 panic("gpio: get BMS pin state failed\n");
  65
  66         gpio_free(7);
  67
  68         if (ret == 0) {
  69                 /* BMS is _not_ set, do the EEPROM check */
  70                 ret = tricorder_get_eeprom(0x51, eeprom);
  71                 if (!ret) {
  72                         if (strncmp(eeprom->board_name, "CS10411", 7) != 0)
  73                                 panic("Wrong board name '%.*s'\n",
  74                                       sizeof(eeprom->board_name),
  75                                                 eeprom->board_name);
  76                         if (eeprom->board_version[0] < 'D')
  77                                 panic("Wrong board version '%.*s'\n",
  78                                       sizeof(eeprom->board_version),
  79                                                 eeprom->board_version);
  80                 } else {
  81                         panic("Could not get board revision\n");
  82                 }
  83         } else {
  84                 memset(eeprom, 0, TRICORDER_EEPROM_SIZE);
  85         }
  86 }
  87
  88 /**
  89  * print_hwversion - print out a HW version string
  90  *
  91  * @eeprom - pointer to the eeprom
  92  */
  93 static void print_hwversion(struct tricorder_eeprom *eeprom)
  94 {
  95         size_t len;
  96         if (!eeprom)
  97                 panic("No eeprom given!");
  98
  99         printf("Board %.*s:%.*s serial %.*s",
 100                sizeof(eeprom->board_name), eeprom->board_name,
 101                sizeof(eeprom->board_version), eeprom->board_version,
 102                sizeof(eeprom->board_serial), eeprom->board_serial);
 103
 104         len = strnlen(eeprom->interface_version,
 105                       sizeof(eeprom->interface_version));
 106         if (len > 0)
 107                 printf(" HW interface version %.*s",
 108                        sizeof(eeprom->interface_version),
 109                        eeprom->interface_version);
 110         puts("\n");
 111 }
 112
 113 /*
 114  * Routine: misc_init_r
 115  * Description: Configure board specific parts
 116  */
 117 int misc_init_r(void)
 118 {
 119         struct tricorder_eeprom eeprom;
 120         get_eeprom(&eeprom);
 121         print_hwversion(&eeprom);
 122
 123         twl4030_power_init();
 124         status_led_set(0, CONFIG_LED_STATUS_ON);
 125         status_led_set(1, CONFIG_LED_STATUS_ON);
 126         status_led_set(2, CONFIG_LED_STATUS_ON);
 127
 128         omap_die_id_display();
 129
 130         return 0;
 131 }
 132
 133 /*
 134  * Routine: set_muxconf_regs
 135  * Description: Setting up the configuration Mux registers specific to the
 136  *              hardware. Many pins need to be moved from protect to primary
 137  *              mode.
 138  */
 139 void set_muxconf_regs(void)
 140 {
 141         MUX_TRICORDER();
 142 }
 143
 144 #if defined(CONFIG_MMC)
 145 int board_mmc_init(bd_t *bis)
 146 {
 147         return omap_mmc_init(0, 0, 0, -1, -1);
 148 }
 149 #endif
 150
 151 #if defined(CONFIG_MMC)
 152 void board_mmc_power_init(void)
 153 {
 154         twl4030_power_mmc_init(0);
 155 }
 156 #endif
 157
 158 /*
 159  * Routine: get_board_mem_timings
 160  * Description: If we use SPL then there is no x-loader nor config header
 161  * so we have to setup the DDR timings ourself on the first bank.  This
 162  * provides the timing values back to the function that configures
 163  * the memory.  We have either one or two banks of 128MB DDR.
 164  */
 165 void get_board_mem_timings(struct board_sdrc_timings *timings)
 166 {
 167         struct tricorder_eeprom eeprom;
 168         get_eeprom(&eeprom);
 169
 170         /* General SDRC config */
 171         if (eeprom.board_version[0] > 'D') {
 172                 /* use optimized timings for our SDRAM device */
 173                 timings->mcfg = MCFG((256 << 20), 14);
 174 #define MT46H64M32_TDAL  6      /* Twr/Tck + Trp/tck            */
 175                                 /* 15/6 + 18/6 = 5.5 -> 6       */
 176 #define MT46H64M32_TDPL  3      /* 15/6 = 2.5 -> 3 (Twr)        */
 177 #define MT46H64M32_TRRD  2      /* 12/6 = 2                     */
 178 #define MT46H64M32_TRCD  3      /* 18/6 = 3                     */
 179 #define MT46H64M32_TRP   3      /* 18/6 = 3                     */
 180 #define MT46H64M32_TRAS  7      /* 42/6 = 7                     */
 181 #define MT46H64M32_TRC  10      /* 60/6 = 10                    */
 182 #define MT46H64M32_TRFC 12      /* 72/6 = 12                    */
 183                 timings->ctrla = ACTIM_CTRLA(MT46H64M32_TRFC, MT46H64M32_TRC,
 184                                              MT46H64M32_TRAS, MT46H64M32_TRP,
 185                                              MT46H64M32_TRCD, MT46H64M32_TRRD,
 186                                              MT46H64M32_TDPL,
 187                                              MT46H64M32_TDAL);
 188
 189 #define MT46H64M32_TWTR 1
 190 #define MT46H64M32_TCKE 1
 191 #define MT46H64M32_XSR 19       /* 112.5/6 = 18.75 => ~19       */
 192 #define MT46H64M32_TXP 1
 193                 timings->ctrlb = ACTIM_CTRLB(MT46H64M32_TWTR, MT46H64M32_TCKE,
 194                                              MT46H64M32_TXP, MT46H64M32_XSR);
 195
 196                 timings->mr = MICRON_V_MR_165;
 197                 timings->rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_165MHz;
 198         } else {
 199                 /* use conservative beagleboard timings as default */
 200                 timings->mcfg = MICRON_V_MCFG_165(128 << 20);
 201                 timings->ctrla = MICRON_V_ACTIMA_165;
 202                 timings->ctrlb = MICRON_V_ACTIMB_165;
 203                 timings->mr = MICRON_V_MR_165;
 204                 timings->rfr_ctrl = SDP_3430_SDRC_RFR_CTRL_165MHz;
 205         }
 206 }