board/engicam/imx6ul/imx6ul.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2016 Amarula Solutions B.V.
   4  * Copyright (C) 2016 Engicam S.r.l.
   5  * Author: Jagan Teki <jagan@amarulasolutions.com>
   6  */
   7
   8 #include <common.h>
   9 #include <mmc.h>
  10
  11 #include <asm/io.h>
  12 #include <asm/gpio.h>
  13 #include <linux/sizes.h>
  14
  15 #include <asm/arch/clock.h>
  16 #include <asm/arch/crm_regs.h>
  17 #include <asm/arch/iomux.h>
  18 #include <asm/arch/mx6-pins.h>
  19 #include <asm/arch/sys_proto.h>
  20 #include <asm/mach-imx/iomux-v3.h>
  21
  22 #include "../common/board.h"
  23
  24 #ifdef CONFIG_NAND_MXS
  25
  26 #define GPMI_PAD_CTRL0          (PAD_CTL_PKE | PAD_CTL_PUE | PAD_CTL_PUS_100K_UP)
  27 #define GPMI_PAD_CTRL1          (PAD_CTL_DSE_40ohm | PAD_CTL_SPEED_MED | \
  28                                 PAD_CTL_SRE_FAST)
  29 #define GPMI_PAD_CTRL2          (GPMI_PAD_CTRL0 | GPMI_PAD_CTRL1)
  30
  31 static iomux_v3_cfg_t const nand_pads[] = {
  32         IOMUX_PADS(PAD_NAND_DATA00__RAWNAND_DATA00 | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
  33         IOMUX_PADS(PAD_NAND_DATA01__RAWNAND_DATA01 | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
  34         IOMUX_PADS(PAD_NAND_DATA02__RAWNAND_DATA02 | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
  35         IOMUX_PADS(PAD_NAND_DATA03__RAWNAND_DATA03 | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
  36         IOMUX_PADS(PAD_NAND_DATA04__RAWNAND_DATA04 | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
  37         IOMUX_PADS(PAD_NAND_DATA05__RAWNAND_DATA05 | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
  38         IOMUX_PADS(PAD_NAND_DATA06__RAWNAND_DATA06 | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
  39         IOMUX_PADS(PAD_NAND_DATA07__RAWNAND_DATA07 | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
  40         IOMUX_PADS(PAD_NAND_CLE__RAWNAND_CLE | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
  41         IOMUX_PADS(PAD_NAND_ALE__RAWNAND_ALE | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
  42         IOMUX_PADS(PAD_NAND_CE0_B__RAWNAND_CE0_B | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
  43         IOMUX_PADS(PAD_NAND_RE_B__RAWNAND_RE_B | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
  44         IOMUX_PADS(PAD_NAND_WE_B__RAWNAND_WE_B | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
  45         IOMUX_PADS(PAD_NAND_WP_B__RAWNAND_WP_B | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
  46         IOMUX_PADS(PAD_NAND_READY_B__RAWNAND_READY_B | MUX_PAD_CTRL(GPMI_PAD_CTRL2)),
  47 };
  48
  49 void setup_gpmi_nand(void)
  50 {
  51         struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
  52
  53         /* config gpmi nand iomux */
  54         SETUP_IOMUX_PADS(nand_pads);
  55
  56         clrbits_le32(&mxc_ccm->CCGR4,
  57                      MXC_CCM_CCGR4_RAWNAND_U_BCH_INPUT_APB_MASK |
  58                      MXC_CCM_CCGR4_RAWNAND_U_GPMI_BCH_INPUT_BCH_MASK |
  59                      MXC_CCM_CCGR4_RAWNAND_U_GPMI_BCH_INPUT_GPMI_IO_MASK |
  60                      MXC_CCM_CCGR4_RAWNAND_U_GPMI_INPUT_APB_MASK |
  61                      MXC_CCM_CCGR4_PL301_MX6QPER1_BCH_MASK);
  62
  63         /*
  64          * config gpmi and bch clock to 100 MHz
  65          * bch/gpmi select PLL2 PFD2 400M
  66          * 100M = 400M / 4
  67          */
  68         clrbits_le32(&mxc_ccm->cscmr1,
  69                      MXC_CCM_CSCMR1_BCH_CLK_SEL |
  70                      MXC_CCM_CSCMR1_GPMI_CLK_SEL);
  71         clrsetbits_le32(&mxc_ccm->cscdr1,
  72                         MXC_CCM_CSCDR1_BCH_PODF_MASK |
  73                         MXC_CCM_CSCDR1_GPMI_PODF_MASK,
  74                         (3 << MXC_CCM_CSCDR1_BCH_PODF_OFFSET) |
  75                         (3 << MXC_CCM_CSCDR1_GPMI_PODF_OFFSET));
  76
  77         /* enable gpmi and bch clock gating */
  78         setbits_le32(&mxc_ccm->CCGR4,
  79                      MXC_CCM_CCGR4_RAWNAND_U_BCH_INPUT_APB_MASK |
  80                      MXC_CCM_CCGR4_RAWNAND_U_GPMI_BCH_INPUT_BCH_MASK |
  81                      MXC_CCM_CCGR4_RAWNAND_U_GPMI_BCH_INPUT_GPMI_IO_MASK |
  82                      MXC_CCM_CCGR4_RAWNAND_U_GPMI_INPUT_APB_MASK |
  83                      MXC_CCM_CCGR4_PL301_MX6QPER1_BCH_MASK);
  84
  85         /* enable apbh clock gating */
  86         setbits_le32(&mxc_ccm->CCGR0, MXC_CCM_CCGR0_APBHDMA_MASK);
  87 }
  88 #endif /* CONFIG_NAND_MXS */
  89
  90 #ifdef CONFIG_ENV_IS_IN_MMC
  91 int board_mmc_get_env_dev(int devno)
  92 {
  93         /* dev 0 for SD/eSD, dev 1 for MMC/eMMC */
  94         return (devno == 0) ? 0 : 1;
  95 }
  96 #endif