imx6: isiotmx6ul: Add NAND support

Add NAND support for Engicam Is.IoT MX6UL board.

Cc: Stefano Babic <sbabic@denx.de>
Cc: Matteo Lisi <matteo.lisi@engicam.com>
Cc: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>

arch/arm/dts/Makefile

@@ -317,7 +317,8 @@ dtb-$(CONFIG_MX6) += imx6ull-14x14-evk.dtb \
 	imx6q-icore-rqs.dtb \
 	imx6sx-sabreauto.dtb \
 	imx6ul-geam-kit.dtb \
-	imx6ul-isiot-mmc.dtb
+	imx6ul-isiot-mmc.dtb \
+	imx6ul-isiot-nand.dtb
 
 dtb-$(CONFIG_MX7) += imx7-colibri.dtb
 

arch/arm/dts/imx6ul-isiot-nand.dts

@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2016 Amarula Solutions B.V.
+ * Copyright (C) 2016 Engicam S.r.l.
+ *
+ * This file is dual-licensed: you can use it either under the terms
+ * of the GPL or the X11 license, at your option. Note that this dual
+ * licensing only applies to this file, and not this project as a
+ * whole.
+ *
+ *  a) This file is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU General Public License
+ *     version 2 as published by the Free Software Foundation.
+ *
+ *     This file is distributed in the hope that it will be useful
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ * Or, alternatively
+ *
+ *  b) Permission is hereby granted, free of charge, to any person
+ *     obtaining a copy of this software and associated documentation
+ *     files (the "Software"), to deal in the Software without
+ *     restriction, including without limitation the rights to use
+ *     copy, modify, merge, publish, distribute, sublicense, and/or
+ *     sell copies of the Software, and to permit persons to whom the
+ *     Software is furnished to do so, subject to the following
+ *     conditions:
+ *
+ *     The above copyright notice and this permission notice shall be
+ *     included in all copies or substantial portions of the Software.
+ *
+ *     THE SOFTWARE IS PROVIDED , WITHOUT WARRANTY OF ANY KIND
+ *     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ *     OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ *     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ *     HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY
+ *     WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ *     OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/dts-v1/;
+
+#include "imx6ul-isiot.dtsi"
+
+/ {
+	model = "Engicam Is.IoT MX6UL NAND Starterkit";
+	compatible = "engicam,imx6ul-isiot", "fsl,imx6ul";
+};

board/engicam/isiotmx6ul/MAINTAINERS

@@ -4,5 +4,7 @@ S:	Maintained
 F:	board/engicam/isiotmx6ul
 F:	include/configs/imx6ul_isiot.h
 F:	configs/imx6ul_isiot_mmc_defconfig
+F:	configs/imx6ul_isiot_nand_defconfig
 F:	arch/arm/dts/imx6ul-isiot.dtsi
 F:	arch/arm/dts/imx6ul-isiot-mmc.dts
+F:	arch/arm/dts/imx6ul-isiot-nand.dts

board/engicam/isiotmx6ul/isiotmx6ul.c

@@ -37,11 +37,80 @@ int board_early_init_f(void)
 	return 0;
 }
 
+#ifdef CONFIG_NAND_MXS
+
+#define GPMI_PAD_CTRL0		(PAD_CTL_PKE | PAD_CTL_PUE | PAD_CTL_PUS_100K_UP)
+#define GPMI_PAD_CTRL1		(PAD_CTL_DSE_40ohm | PAD_CTL_SPEED_MED | \
+				PAD_CTL_SRE_FAST)
+#define GPMI_PAD_CTRL2		(GPMI_PAD_CTRL0 | GPMI_PAD_CTRL1)
+
+static iomux_v3_cfg_t const nand_pads[] = {
+	MX6_PAD_NAND_DATA00__RAWNAND_DATA00 | MUX_PAD_CTRL(GPMI_PAD_CTRL2),
+	MX6_PAD_NAND_DATA01__RAWNAND_DATA01 | MUX_PAD_CTRL(GPMI_PAD_CTRL2),
+	MX6_PAD_NAND_DATA02__RAWNAND_DATA02 | MUX_PAD_CTRL(GPMI_PAD_CTRL2),
+	MX6_PAD_NAND_DATA03__RAWNAND_DATA03 | MUX_PAD_CTRL(GPMI_PAD_CTRL2),
+	MX6_PAD_NAND_DATA04__RAWNAND_DATA04 | MUX_PAD_CTRL(GPMI_PAD_CTRL2),
+	MX6_PAD_NAND_DATA05__RAWNAND_DATA05 | MUX_PAD_CTRL(GPMI_PAD_CTRL2),
+	MX6_PAD_NAND_DATA06__RAWNAND_DATA06 | MUX_PAD_CTRL(GPMI_PAD_CTRL2),
+	MX6_PAD_NAND_DATA07__RAWNAND_DATA07 | MUX_PAD_CTRL(GPMI_PAD_CTRL2),
+	MX6_PAD_NAND_CLE__RAWNAND_CLE | MUX_PAD_CTRL(GPMI_PAD_CTRL2),
+	MX6_PAD_NAND_ALE__RAWNAND_ALE | MUX_PAD_CTRL(GPMI_PAD_CTRL2),
+	MX6_PAD_NAND_CE0_B__RAWNAND_CE0_B | MUX_PAD_CTRL(GPMI_PAD_CTRL2),
+	MX6_PAD_NAND_RE_B__RAWNAND_RE_B | MUX_PAD_CTRL(GPMI_PAD_CTRL2),
+	MX6_PAD_NAND_WE_B__RAWNAND_WE_B | MUX_PAD_CTRL(GPMI_PAD_CTRL2),
+	MX6_PAD_NAND_WP_B__RAWNAND_WP_B | MUX_PAD_CTRL(GPMI_PAD_CTRL2),
+	MX6_PAD_NAND_READY_B__RAWNAND_READY_B | MUX_PAD_CTRL(GPMI_PAD_CTRL2),
+};
+
+static void setup_gpmi_nand(void)
+{
+	struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
+
+	/* config gpmi nand iomux */
+	imx_iomux_v3_setup_multiple_pads(nand_pads, ARRAY_SIZE(nand_pads));
+
+	clrbits_le32(&mxc_ccm->CCGR4,
+		     MXC_CCM_CCGR4_RAWNAND_U_BCH_INPUT_APB_MASK |
+		     MXC_CCM_CCGR4_RAWNAND_U_GPMI_BCH_INPUT_BCH_MASK |
+		     MXC_CCM_CCGR4_RAWNAND_U_GPMI_BCH_INPUT_GPMI_IO_MASK |
+		     MXC_CCM_CCGR4_RAWNAND_U_GPMI_INPUT_APB_MASK |
+		     MXC_CCM_CCGR4_PL301_MX6QPER1_BCH_MASK);
+
+	/*
+	 * config gpmi and bch clock to 100 MHz
+	 * bch/gpmi select PLL2 PFD2 400M
+	 * 100M = 400M / 4
+	 */
+	clrbits_le32(&mxc_ccm->cscmr1,
+		     MXC_CCM_CSCMR1_BCH_CLK_SEL |
+		     MXC_CCM_CSCMR1_GPMI_CLK_SEL);
+	clrsetbits_le32(&mxc_ccm->cscdr1,
+			MXC_CCM_CSCDR1_BCH_PODF_MASK |
+			MXC_CCM_CSCDR1_GPMI_PODF_MASK,
+			(3 << MXC_CCM_CSCDR1_BCH_PODF_OFFSET) |
+			(3 << MXC_CCM_CSCDR1_GPMI_PODF_OFFSET));
+
+	/* enable gpmi and bch clock gating */
+	setbits_le32(&mxc_ccm->CCGR4,
+		     MXC_CCM_CCGR4_RAWNAND_U_BCH_INPUT_APB_MASK |
+		     MXC_CCM_CCGR4_RAWNAND_U_GPMI_BCH_INPUT_BCH_MASK |
+		     MXC_CCM_CCGR4_RAWNAND_U_GPMI_BCH_INPUT_GPMI_IO_MASK |
+		     MXC_CCM_CCGR4_RAWNAND_U_GPMI_INPUT_APB_MASK |
+		     MXC_CCM_CCGR4_PL301_MX6QPER1_BCH_MASK);
+
+	/* enable apbh clock gating */
+	setbits_le32(&mxc_ccm->CCGR0, MXC_CCM_CCGR0_APBHDMA_MASK);
+}
+#endif /* CONFIG_NAND_MXS */
+
 int board_init(void)
 {
 	/* Address of boot parameters */
 	gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;
 
+#ifdef CONFIG_NAND_MXS
+	setup_gpmi_nand();
+#endif
 	return 0;
 }
 

configs/imx6ul_isiot_nand_defconfig

@@ -0,0 +1,39 @@
+CONFIG_ARM=y
+CONFIG_ARCH_MX6=y
+CONFIG_SPL_GPIO_SUPPORT=y
+CONFIG_SPL_LIBCOMMON_SUPPORT=y
+CONFIG_SPL_LIBGENERIC_SUPPORT=y
+CONFIG_TARGET_MX6UL_ISIOT=y
+CONFIG_SPL_SERIAL_SUPPORT=y
+CONFIG_SPL_WATCHDOG_SUPPORT=y
+CONFIG_DEFAULT_DEVICE_TREE="imx6ul-isiot-nand"
+CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=arch/arm/imx-common/spl_sd.cfg,ENV_IS_IN_NAND"
+CONFIG_BOOTDELAY=3
+CONFIG_DEFAULT_FDT_FILE="imx6ul-isiot-nand.dtb"
+CONFIG_SPL=y
+CONFIG_SPL_DMA_SUPPORT=y
+CONFIG_HUSH_PARSER=y
+CONFIG_FIT=y
+CONFIG_FIT_VERBOSE=y
+CONFIG_FIT_SIGNATURE=y
+CONFIG_SYS_PROMPT="isiotmx6ul> "
+# CONFIG_CMD_IMLS is not set
+CONFIG_CMD_MEMTEST=y
+CONFIG_CMD_MMC=y
+CONFIG_CMD_NAND=y
+CONFIG_CMD_GPIO=y
+CONFIG_CMD_MII=y
+CONFIG_CMD_PING=y
+CONFIG_CMD_CACHE=y
+CONFIG_CMD_EXT4=y
+CONFIG_CMD_EXT4_WRITE=y
+CONFIG_CMD_FAT=y
+CONFIG_CMD_FS_GENERIC=y
+# CONFIG_BLK is not set
+# CONFIG_DM_MMC_OPS is not set
+CONFIG_NAND_MXS=y
+CONFIG_FEC_MXC=y
+CONFIG_PINCTRL=y
+CONFIG_PINCTRL_IMX6=y
+CONFIG_MXC_UART=y
+CONFIG_IMX_THERMAL=y

include/configs/imx6ul_isiot.h

@@ -27,6 +27,10 @@
 /* Environment in MMC */
 # if defined(CONFIG_ENV_IS_IN_MMC)
 #  define CONFIG_ENV_OFFSET		0x100000
+/* Environment in NAND */
+# elif defined(CONFIG_ENV_IS_IN_NAND)
+#  define CONFIG_ENV_OFFSET		0x400000
+#  define CONFIG_ENV_SECT_SIZE		CONFIG_ENV_SIZE
 # endif
 #endif
 
@@ -128,6 +132,21 @@
 # define CONFIG_SYS_FSL_ESDHC_ADDR	0
 #endif
 
+/* NAND */
+#ifdef CONFIG_NAND_MXS
+# define CONFIG_SYS_MAX_NAND_DEVICE	1
+# define CONFIG_SYS_NAND_BASE		0x40000000
+# define CONFIG_SYS_NAND_5_ADDR_CYCLE
+# define CONFIG_SYS_NAND_ONFI_DETECTION
+# define CONFIG_SYS_NAND_U_BOOT_START	CONFIG_SYS_TEXT_BASE
+# define CONFIG_SYS_NAND_U_BOOT_OFFS	0x200000
+
+/* APBH DMA */
+# define CONFIG_APBH_DMA
+# define CONFIG_APBH_DMA_BURST
+# define CONFIG_APBH_DMA_BURST8
+#endif
+
 /* Ethernet */
 #ifdef CONFIG_FEC_MXC
 # define CONFIG_FEC_MXC_PHYADDR		0
@@ -140,7 +159,11 @@
 
 /* SPL */
 #ifdef CONFIG_SPL
-# define CONFIG_SPL_MMC_SUPPORT
+# ifdef CONFIG_NAND_MXS
+#  define CONFIG_SPL_NAND_SUPPORT
+# else
+#  define CONFIG_SPL_MMC_SUPPORT
+# endif
 
 # include "imx6_spl.h"
 # ifdef CONFIG_SPL_BUILD