board/omicron/calimain/calimain.c

   1 /*
   2  * Copyright (C) 2011 OMICRON electronics GmbH
   3  *
   4  * Based on da850evm.c. Original Copyrights follow:
   5  *
   6  * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
   7  * Copyright (C) 2009 Nick Thompson, GE Fanuc, Ltd. <nick.thompson@gefanuc.com>
   8  * Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
   9  *
  10  * SPDX-License-Identifier:     GPL-2.0+
  11  */
  12
  13 #include <common.h>
  14 #include <i2c.h>
  15 #include <net.h>
  16 #include <netdev.h>
  17 #include <watchdog.h>
  18 #include <asm/io.h>
  19 #include <asm/arch/hardware.h>
  20 #include <asm/arch/gpio.h>
  21 #include <asm/ti-common/davinci_nand.h>
  22 #include <asm/arch/emac_defs.h>
  23 #include <asm/arch/pinmux_defs.h>
  24 #include <asm/arch/davinci_misc.h>
  25 #include <asm/arch/timer_defs.h>
  26
  27 DECLARE_GLOBAL_DATA_PTR;
  28
  29 #define CALIMAIN_HWVERSION_MASK    0x7f000000
  30 #define CALIMAIN_HWVERSION_SHIFT   24
  31
  32 /* Hardware version pinmux settings */
  33 const struct pinmux_config hwversion_pins[] = {
  34         { pinmux(16), 8, 2 }, /* GP7[15] */
  35         { pinmux(16), 8, 3 }, /* GP7[14] */
  36         { pinmux(16), 8, 4 }, /* GP7[13] */
  37         { pinmux(16), 8, 5 }, /* GP7[12] */
  38         { pinmux(16), 8, 6 }, /* GP7[11] */
  39         { pinmux(16), 8, 7 }, /* GP7[10] */
  40         { pinmux(17), 8, 0 }, /* GP7[9] */
  41         { pinmux(17), 8, 1 }  /* GP7[8] */
  42 };
  43
  44 const struct pinmux_resource pinmuxes[] = {
  45         PINMUX_ITEM(uart2_pins_txrx),
  46         PINMUX_ITEM(emac_pins_mii),
  47         PINMUX_ITEM(emac_pins_mdio),
  48         PINMUX_ITEM(emifa_pins_nor),
  49         PINMUX_ITEM(emifa_pins_cs2),
  50         PINMUX_ITEM(emifa_pins_cs3),
  51 };
  52
  53 const int pinmuxes_size = ARRAY_SIZE(pinmuxes);
  54
  55 const struct lpsc_resource lpsc[] = {
  56         { DAVINCI_LPSC_AEMIF }, /* NAND, NOR */
  57         { DAVINCI_LPSC_EMAC },  /* image download */
  58         { DAVINCI_LPSC_UART2 }, /* console */
  59         { DAVINCI_LPSC_GPIO },
  60 };
  61
  62 const int lpsc_size = ARRAY_SIZE(lpsc);
  63
  64 /* read board revision from GPIO7[8..14] */
  65 u32 get_board_rev(void)
  66 {
  67         lpsc_on(DAVINCI_LPSC_GPIO);
  68         if (davinci_configure_pin_mux(hwversion_pins,
  69                                       ARRAY_SIZE(hwversion_pins)) != 0)
  70                 return 0xffffffff;
  71
  72         return (davinci_gpio_bank67->in_data & CALIMAIN_HWVERSION_MASK)
  73                 >> CALIMAIN_HWVERSION_SHIFT;
  74 }
  75
  76 /*
  77  * determine the oscillator frequency depending on the board revision
  78  *
  79  * rev 0x00  ... 25 MHz oscillator
  80  * rev 0x01  ... 24 MHz oscillator
  81  */
  82 int calimain_get_osc_freq(void)
  83 {
  84         u32 rev;
  85         int freq;
  86
  87         rev = get_board_rev();
  88         switch (rev) {
  89         case 0x00:
  90                 freq = 25000000;
  91                 break;
  92         default:
  93                 freq = 24000000;
  94                 break;
  95         }
  96         return freq;
  97 }
  98
  99 int board_init(void)
 100 {
 101         int val;
 102
 103         irq_init();
 104
 105         /* address of boot parameters */
 106         gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR;
 107
 108 #ifdef CONFIG_DRIVER_TI_EMAC
 109         /* select emac MII mode */
 110         val = readl(&davinci_syscfg_regs->cfgchip3);
 111         val &= ~(1 << 8);
 112         writel(val, &davinci_syscfg_regs->cfgchip3);
 113 #endif /* CONFIG_DRIVER_TI_EMAC */
 114
 115 #ifdef CONFIG_HW_WATCHDOG
 116         davinci_hw_watchdog_enable();
 117 #endif
 118
 119         printf("Input clock frequency: %d Hz\n", calimain_get_osc_freq());
 120         printf("Board revision:        %d\n", get_board_rev());
 121
 122         return 0;
 123 }
 124
 125 #ifdef CONFIG_DRIVER_TI_EMAC
 126 /*
 127  * Initializes on-board ethernet controllers.
 128  */
 129 int board_eth_init(bd_t *bis)
 130 {
 131         if (!davinci_emac_initialize()) {
 132                 printf("Error: Ethernet init failed!\n");
 133                 return -1;
 134         }
 135
 136         return 0;
 137 }
 138 #endif /* CONFIG_DRIVER_TI_EMAC */
 139
 140 #ifdef CONFIG_HW_WATCHDOG
 141 void hw_watchdog_reset(void)
 142 {
 143         davinci_hw_watchdog_reset();
 144 }
 145 #endif