board/karo/tx25/tx25.c

   1 /*
   2  * (C) Copyright 2009 DENX Software Engineering
   3  * Author: John Rigby <jrigby@gmail.com>
   4  *
   5  * Based on imx27lite.c:
   6  *   Copyright (C) 2008,2009 Eric Jarrige <jorasse@users.sourceforge.net>
   7  *   Copyright (C) 2009 Ilya Yanok <yanok@emcraft.com>
   8  * And:
   9  *   RedBoot tx25_misc.c Copyright (C) 2009 Red Hat
  10  *
  11  * SPDX-License-Identifier:     GPL-2.0+
  12  */
  13 #include <common.h>
  14 #include <asm/io.h>
  15 #include <asm/arch/imx-regs.h>
  16 #include <asm/arch/iomux-mx25.h>
  17 #include <asm/gpio.h>
  18
  19 DECLARE_GLOBAL_DATA_PTR;
  20
  21 #ifdef CONFIG_SPL_BUILD
  22 void board_init_f(ulong bootflag)
  23 {
  24         /*
  25          * copy ourselves from where we are running to where we were
  26          * linked at. Use ulong pointers as all addresses involved
  27          * are 4-byte-aligned.
  28          */
  29         ulong *start_ptr, *end_ptr, *link_ptr, *run_ptr, *dst;
  30         asm volatile ("ldr %0, =_start" : "=r"(start_ptr));
  31         asm volatile ("ldr %0, =_end" : "=r"(end_ptr));
  32         asm volatile ("ldr %0, =board_init_f" : "=r"(link_ptr));
  33         asm volatile ("adr %0, board_init_f" : "=r"(run_ptr));
  34         for (dst = start_ptr; dst < end_ptr; dst++)
  35                 *dst = *(dst+(run_ptr-link_ptr));
  36         /*
  37          * branch to nand_boot's link-time address.
  38          */
  39         asm volatile("ldr pc, =nand_boot");
  40 }
  41 #endif
  42
  43 #ifdef CONFIG_FEC_MXC
  44 /*
  45  * FIXME: need to revisit this
  46  * The original code enabled PUE and 100-k pull-down without PKE, so the right
  47  * value here is likely:
  48  *      0 for no pull
  49  * or:
  50  *      PAD_CTL_PUS_100K_DOWN for 100-k pull-down
  51  */
  52 #define FEC_OUT_PAD_CTRL        0
  53
  54 #define GPIO_FEC_RESET_B        IMX_GPIO_NR(4, 7)
  55 #define GPIO_FEC_ENABLE_B       IMX_GPIO_NR(4, 9)
  56
  57 void tx25_fec_init(void)
  58 {
  59         static const iomux_v3_cfg_t fec_pads[] = {
  60                 MX25_PAD_FEC_TX_CLK__FEC_TX_CLK,
  61                 MX25_PAD_FEC_RX_DV__FEC_RX_DV,
  62                 MX25_PAD_FEC_RDATA0__FEC_RDATA0,
  63                 NEW_PAD_CTRL(MX25_PAD_FEC_TDATA0__FEC_TDATA0, FEC_OUT_PAD_CTRL),
  64                 NEW_PAD_CTRL(MX25_PAD_FEC_TX_EN__FEC_TX_EN, FEC_OUT_PAD_CTRL),
  65                 NEW_PAD_CTRL(MX25_PAD_FEC_MDC__FEC_MDC, FEC_OUT_PAD_CTRL),
  66                 MX25_PAD_FEC_MDIO__FEC_MDIO,
  67                 MX25_PAD_FEC_RDATA1__FEC_RDATA1,
  68                 NEW_PAD_CTRL(MX25_PAD_FEC_TDATA1__FEC_TDATA1, FEC_OUT_PAD_CTRL),
  69
  70                 NEW_PAD_CTRL(MX25_PAD_D13__GPIO_4_7, 0), /* FEC_RESET_B */
  71                 NEW_PAD_CTRL(MX25_PAD_D11__GPIO_4_9, 0), /* FEC_ENABLE_B */
  72         };
  73
  74         static const iomux_v3_cfg_t fec_cfg_pads[] = {
  75                 MX25_PAD_FEC_RDATA0__GPIO_3_10,
  76                 MX25_PAD_FEC_RDATA1__GPIO_3_11,
  77                 MX25_PAD_FEC_RX_DV__GPIO_3_12,
  78         };
  79
  80         debug("tx25_fec_init\n");
  81         imx_iomux_v3_setup_multiple_pads(fec_pads, ARRAY_SIZE(fec_pads));
  82
  83         /* drop PHY power and assert reset (low) */
  84         gpio_direction_output(GPIO_FEC_RESET_B, 0);
  85         gpio_direction_output(GPIO_FEC_ENABLE_B, 0);
  86
  87         mdelay(5);
  88
  89         debug("resetting phy\n");
  90
  91         /* turn on PHY power leaving reset asserted */
  92         gpio_set_value(GPIO_FEC_ENABLE_B, 1);
  93
  94         mdelay(10);
  95
  96         /*
  97          * Setup some strapping pins that are latched by the PHY
  98          * as reset goes high.
  99          *
 100          * Set PHY mode to 111
 101          *  mode0 comes from FEC_RDATA0 which is GPIO 3_10 in mux mode 5
 102          *  mode1 comes from FEC_RDATA1 which is GPIO 3_11 in mux mode 5
 103          *  mode2 is tied high so nothing to do
 104          *
 105          * Turn on RMII mode
 106          *  RMII mode is selected by FEC_RX_DV which is GPIO 3_12 in mux mode
 107          */
 108         /*
 109          * set each mux mode to gpio mode
 110          */
 111         imx_iomux_v3_setup_multiple_pads(fec_cfg_pads,
 112                                                 ARRAY_SIZE(fec_cfg_pads));
 113
 114         /*
 115          * set each to 1 and make each an output
 116          */
 117         gpio_direction_output(IMX_GPIO_NR(3, 10), 1);
 118         gpio_direction_output(IMX_GPIO_NR(3, 11), 1);
 119         gpio_direction_output(IMX_GPIO_NR(3, 12), 1);
 120
 121         mdelay(22);             /* this value came from RedBoot */
 122
 123         /*
 124          * deassert PHY reset
 125          */
 126         gpio_set_value(GPIO_FEC_RESET_B, 1);
 127
 128         mdelay(5);
 129
 130         /*
 131          * set FEC pins back
 132          */
 133         imx_iomux_v3_setup_multiple_pads(fec_pads, ARRAY_SIZE(fec_pads));
 134 }
 135 #else
 136 #define tx25_fec_init()
 137 #endif
 138
 139 #ifdef CONFIG_MXC_UART
 140 /*
 141  * Set up input pins with hysteresis and 100-k pull-ups
 142  */
 143 #define UART1_IN_PAD_CTRL       (PAD_CTL_HYS | PAD_CTL_PUS_100K_UP)
 144 /*
 145  * FIXME: need to revisit this
 146  * The original code enabled PUE and 100-k pull-down without PKE, so the right
 147  * value here is likely:
 148  *      0 for no pull
 149  * or:
 150  *      PAD_CTL_PUS_100K_DOWN for 100-k pull-down
 151  */
 152 #define UART1_OUT_PAD_CTRL      0
 153
 154 static void tx25_uart1_init(void)
 155 {
 156         static const iomux_v3_cfg_t uart1_pads[] = {
 157                 NEW_PAD_CTRL(MX25_PAD_UART1_RXD__UART1_RXD, UART1_IN_PAD_CTRL),
 158                 NEW_PAD_CTRL(MX25_PAD_UART1_TXD__UART1_TXD, UART1_OUT_PAD_CTRL),
 159                 NEW_PAD_CTRL(MX25_PAD_UART1_RTS__UART1_RTS, UART1_OUT_PAD_CTRL),
 160                 NEW_PAD_CTRL(MX25_PAD_UART1_CTS__UART1_CTS, UART1_IN_PAD_CTRL),
 161         };
 162
 163         imx_iomux_v3_setup_multiple_pads(uart1_pads, ARRAY_SIZE(uart1_pads));
 164 }
 165 #else
 166 #define tx25_uart1_init()
 167 #endif
 168
 169 int board_init()
 170 {
 171         tx25_uart1_init();
 172
 173         /* board id for linux */
 174         gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
 175         return 0;
 176 }
 177
 178 int board_late_init(void)
 179 {
 180         tx25_fec_init();
 181         return 0;
 182 }
 183
 184 int dram_init(void)
 185 {
 186         /* dram_init must store complete ramsize in gd->ram_size */
 187         gd->ram_size = get_ram_size((void *)PHYS_SDRAM_1,
 188                                 PHYS_SDRAM_1_SIZE);
 189         return 0;
 190 }
 191
 192 void dram_init_banksize(void)
 193 {
 194         gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
 195         gd->bd->bi_dram[0].size = get_ram_size((void *)PHYS_SDRAM_1,
 196                         PHYS_SDRAM_1_SIZE);
 197 #if CONFIG_NR_DRAM_BANKS > 1
 198         gd->bd->bi_dram[1].start = PHYS_SDRAM_2;
 199         gd->bd->bi_dram[1].size = get_ram_size((void *)PHYS_SDRAM_2,
 200                         PHYS_SDRAM_2_SIZE);
 201 #else
 202
 203 #endif
 204 }
 205
 206 int checkboard(void)
 207 {
 208         printf("KARO TX25\n");
 209         return 0;
 210 }