board/engicam/isiotmx6ul/isiotmx6ul.c

   1 /*
   2  * Copyright (C) 2016 Amarula Solutions B.V.
   3  * Copyright (C) 2016 Engicam S.r.l.
   4  * Author: Jagan Teki <jagan@amarulasolutions.com>
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <common.h>
  10 #include <mmc.h>
  11
  12 #include <asm/io.h>
  13 #include <asm/gpio.h>
  14 #include <linux/sizes.h>
  15
  16 #include <asm/arch/clock.h>
  17 #include <asm/arch/crm_regs.h>
  18 #include <asm/arch/iomux.h>
  19 #include <asm/arch/mx6-pins.h>
  20 #include <asm/arch/sys_proto.h>
  21 #include <asm/imx-common/iomux-v3.h>
  22
  23 #include "../common/board.h"
  24
  25 DECLARE_GLOBAL_DATA_PTR;
  26
  27 #ifdef CONFIG_NAND_MXS
  28
  29 #define GPMI_PAD_CTRL0          (PAD_CTL_PKE | PAD_CTL_PUE | PAD_CTL_PUS_100K_UP)
  30 #define GPMI_PAD_CTRL1          (PAD_CTL_DSE_40ohm | PAD_CTL_SPEED_MED | \
  31                                 PAD_CTL_SRE_FAST)
  32 #define GPMI_PAD_CTRL2          (GPMI_PAD_CTRL0 | GPMI_PAD_CTRL1)
  33
  34 static iomux_v3_cfg_t const nand_pads[] = {
  35         IOMUX_PADS(PAD_NAND_DATA00__RAWNAND_DATA00 | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
  36         IOMUX_PADS(PAD_NAND_DATA01__RAWNAND_DATA01 | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
  37         IOMUX_PADS(PAD_NAND_DATA02__RAWNAND_DATA02 | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
  38         IOMUX_PADS(PAD_NAND_DATA03__RAWNAND_DATA03 | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
  39         IOMUX_PADS(PAD_NAND_DATA04__RAWNAND_DATA04 | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
  40         IOMUX_PADS(PAD_NAND_DATA05__RAWNAND_DATA05 | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
  41         IOMUX_PADS(PAD_NAND_DATA06__RAWNAND_DATA06 | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
  42         IOMUX_PADS(PAD_NAND_DATA07__RAWNAND_DATA07 | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
  43         IOMUX_PADS(PAD_NAND_CLE__RAWNAND_CLE | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
  44         IOMUX_PADS(PAD_NAND_ALE__RAWNAND_ALE | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
  45         IOMUX_PADS(PAD_NAND_CE0_B__RAWNAND_CE0_B | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
  46         IOMUX_PADS(PAD_NAND_RE_B__RAWNAND_RE_B | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
  47         IOMUX_PADS(PAD_NAND_WE_B__RAWNAND_WE_B | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
  48         IOMUX_PADS(PAD_NAND_WP_B__RAWNAND_WP_B | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
  49         IOMUX_PADS(PAD_NAND_READY_B__RAWNAND_READY_B | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
  50 };
  51
  52 void setup_gpmi_nand(void)
  53 {
  54         struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
  55
  56         /* config gpmi nand iomux */
  57         SETUP_IOMUX_PADS(nand_pads);
  58
  59         clrbits_le32(&mxc_ccm->CCGR4,
  60                      MXC_CCM_CCGR4_RAWNAND_U_BCH_INPUT_APB_MASK |
  61                      MXC_CCM_CCGR4_RAWNAND_U_GPMI_BCH_INPUT_BCH_MASK |
  62                      MXC_CCM_CCGR4_RAWNAND_U_GPMI_BCH_INPUT_GPMI_IO_MASK |
  63                      MXC_CCM_CCGR4_RAWNAND_U_GPMI_INPUT_APB_MASK |
  64                      MXC_CCM_CCGR4_PL301_MX6QPER1_BCH_MASK);
  65
  66         /*
  67          * config gpmi and bch clock to 100 MHz
  68          * bch/gpmi select PLL2 PFD2 400M
  69          * 100M = 400M / 4
  70          */
  71         clrbits_le32(&mxc_ccm->cscmr1,
  72                      MXC_CCM_CSCMR1_BCH_CLK_SEL |
  73                      MXC_CCM_CSCMR1_GPMI_CLK_SEL);
  74         clrsetbits_le32(&mxc_ccm->cscdr1,
  75                         MXC_CCM_CSCDR1_BCH_PODF_MASK |
  76                         MXC_CCM_CSCDR1_GPMI_PODF_MASK,
  77                         (3 << MXC_CCM_CSCDR1_BCH_PODF_OFFSET) |
  78                         (3 << MXC_CCM_CSCDR1_GPMI_PODF_OFFSET));
  79
  80         /* enable gpmi and bch clock gating */
  81         setbits_le32(&mxc_ccm->CCGR4,
  82                      MXC_CCM_CCGR4_RAWNAND_U_BCH_INPUT_APB_MASK |
  83                      MXC_CCM_CCGR4_RAWNAND_U_GPMI_BCH_INPUT_BCH_MASK |
  84                      MXC_CCM_CCGR4_RAWNAND_U_GPMI_BCH_INPUT_GPMI_IO_MASK |
  85                      MXC_CCM_CCGR4_RAWNAND_U_GPMI_INPUT_APB_MASK |
  86                      MXC_CCM_CCGR4_PL301_MX6QPER1_BCH_MASK);
  87
  88         /* enable apbh clock gating */
  89         setbits_le32(&mxc_ccm->CCGR0, MXC_CCM_CCGR0_APBHDMA_MASK);
  90 }
  91 #endif /* CONFIG_NAND_MXS */
  92
  93 #ifdef CONFIG_ENV_IS_IN_MMC
  94 int board_mmc_get_env_dev(int devno)
  95 {
  96         /* dev 0 for SD/eSD, dev 1 for MMC/eMMC */
  97         return (devno == 0) ? 0 : 1;
  98 }
  99 #endif
 100
 101 void setenv_fdt_file(void)
 102 {
 103         if (is_mx6ul()) {
 104 #ifdef CONFIG_ENV_IS_IN_MMC
 105                 setenv("fdt_file", "imx6ul-isiot-emmc.dtb");
 106 #else
 107                 setenv("fdt_file", "imx6ul-isiot-nand.dtb");
 108 #endif
 109         }
 110 }
 111
 112 #ifdef CONFIG_SPL_BUILD
 113 #include <spl.h>
 114
 115 /* MMC board initialization is needed till adding DM support in SPL */
 116 #if defined(CONFIG_FSL_ESDHC) && !defined(CONFIG_DM_MMC)
 117 #include <mmc.h>
 118 #include <fsl_esdhc.h>
 119
 120 #define USDHC_PAD_CTRL (PAD_CTL_PKE | PAD_CTL_PUE |             \
 121         PAD_CTL_PUS_22K_UP  | PAD_CTL_SPEED_LOW |               \
 122         PAD_CTL_DSE_80ohm   | PAD_CTL_SRE_FAST  | PAD_CTL_HYS)
 123
 124 static iomux_v3_cfg_t const usdhc1_pads[] = {
 125         IOMUX_PADS(PAD_SD1_CLK__USDHC1_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
 126         IOMUX_PADS(PAD_SD1_CMD__USDHC1_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
 127         IOMUX_PADS(PAD_SD1_DATA0__USDHC1_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
 128         IOMUX_PADS(PAD_SD1_DATA1__USDHC1_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
 129         IOMUX_PADS(PAD_SD1_DATA2__USDHC1_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
 130         IOMUX_PADS(PAD_SD1_DATA3__USDHC1_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
 131
 132         /* VSELECT */
 133         IOMUX_PADS(PAD_GPIO1_IO05__USDHC1_VSELECT | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
 134         /* CD */
 135         IOMUX_PADS(PAD_UART1_RTS_B__GPIO1_IO19 | MUX_PAD_CTRL(NO_PAD_CTRL)),
 136         /* RST_B */
 137         IOMUX_PADS(PAD_GPIO1_IO09__GPIO1_IO09 | MUX_PAD_CTRL(NO_PAD_CTRL)),
 138 };
 139
 140 static iomux_v3_cfg_t const usdhc2_pads[] = {
 141         IOMUX_PADS(PAD_NAND_ALE__USDHC2_RESET_B | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
 142         IOMUX_PADS(PAD_NAND_RE_B__USDHC2_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
 143         IOMUX_PADS(PAD_NAND_WE_B__USDHC2_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
 144         IOMUX_PADS(PAD_NAND_DATA00__USDHC2_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
 145         IOMUX_PADS(PAD_NAND_DATA01__USDHC2_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
 146         IOMUX_PADS(PAD_NAND_DATA02__USDHC2_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
 147         IOMUX_PADS(PAD_NAND_DATA03__USDHC2_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
 148         IOMUX_PADS(PAD_NAND_DATA04__USDHC2_DATA4 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
 149         IOMUX_PADS(PAD_NAND_DATA05__USDHC2_DATA5 | MUX_PAD_CTRL(USDHC_PAD_CTRL)),
 150 };
 151
 152 #define USDHC1_CD_GPIO  IMX_GPIO_NR(1, 19)
 153 #define USDHC2_CD_GPIO  IMX_GPIO_NR(4, 5)
 154
 155 struct fsl_esdhc_cfg usdhc_cfg[2] = {
 156         {USDHC1_BASE_ADDR, 0, 4},
 157         {USDHC2_BASE_ADDR, 0, 8},
 158 };
 159
 160 int board_mmc_getcd(struct mmc *mmc)
 161 {
 162         struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
 163         int ret = 0;
 164
 165         switch (cfg->esdhc_base) {
 166         case USDHC1_BASE_ADDR:
 167                 ret = !gpio_get_value(USDHC1_CD_GPIO);
 168                 break;
 169         case USDHC2_BASE_ADDR:
 170                 ret = !gpio_get_value(USDHC2_CD_GPIO);
 171                 break;
 172         }
 173
 174         return ret;
 175 }
 176
 177 int board_mmc_init(bd_t *bis)
 178 {
 179         int i, ret;
 180
 181         /*
 182         * According to the board_mmc_init() the following map is done:
 183         * (U-boot device node)    (Physical Port)
 184         * mmc0                          USDHC1
 185         * mmc1                          USDHC2
 186         */
 187         for (i = 0; i < CONFIG_SYS_FSL_USDHC_NUM; i++) {
 188                 switch (i) {
 189                 case 0:
 190                         SETUP_IOMUX_PADS(usdhc1_pads);
 191                         gpio_direction_input(USDHC1_CD_GPIO);
 192                         usdhc_cfg[i].sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK);
 193                         break;
 194                 case 1:
 195                         SETUP_IOMUX_PADS(usdhc2_pads);
 196                         gpio_direction_input(USDHC2_CD_GPIO);
 197                         usdhc_cfg[i].sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK);
 198                         break;
 199                 default:
 200                         printf("Warning - USDHC%d controller not supporting\n",
 201                                i + 1);
 202                         return 0;
 203                 }
 204
 205                 ret = fsl_esdhc_initialize(bis, &usdhc_cfg[i]);
 206                 if (ret) {
 207                         printf("Warning: failed to initialize mmc dev %d\n", i);
 208                         return ret;
 209                 }
 210         }
 211
 212         return 0;
 213 }
 214
 215 #ifdef CONFIG_ENV_IS_IN_MMC
 216 void board_boot_order(u32 *spl_boot_list)
 217 {
 218         u32 bmode = imx6_src_get_boot_mode();
 219         u8 boot_dev = BOOT_DEVICE_MMC1;
 220
 221         switch ((bmode & IMX6_BMODE_MASK) >> IMX6_BMODE_SHIFT) {
 222         case IMX6_BMODE_SD:
 223         case IMX6_BMODE_ESD:
 224                 /* SD/eSD - BOOT_DEVICE_MMC1 */
 225                 break;
 226         case IMX6_BMODE_MMC:
 227         case IMX6_BMODE_EMMC:
 228                 /* MMC/eMMC */
 229                 boot_dev = BOOT_DEVICE_MMC2;
 230                 break;
 231         default:
 232                 /* Default - BOOT_DEVICE_MMC1 */
 233                 printf("Wrong board boot order\n");
 234                 break;
 235         }
 236
 237         spl_boot_list[0] = boot_dev;
 238 }
 239 #endif
 240 #endif /* CONFIG_FSL_ESDHC */
 241 #endif /* CONFIG_SPL_BUILD */