[PATCH] ARM: i.MX: Kamstrup mx7 concentrator board support

[Lars Pedersen <lapeddk@gmail.com>]

This adds support for Kamstrup mx7 concentrator board

Signed-off-by: Lars Pedersen <lapeddk@gmail.com>
Reviewed-by: Bruno Thomsen <bruno.thomsen@gmail.com>
---
 arch/arm/boards/Makefile                      |   1 +
 .../boards/kamstrup-mx7-concentrator/Makefile |   2 +
 .../boards/kamstrup-mx7-concentrator/board.c  |  51 +++++++++
 .../flash-header-tqma7d.imxcfg                |  79 +++++++++++++
 .../kamstrup-mx7-concentrator/lowlevel.c      |  35 ++++++
 arch/arm/dts/Makefile                         |   1 +
 arch/arm/dts/imx7d-flex-concentrator-mfg.dts  | 108 ++++++++++++++++++
 arch/arm/mach-imx/Kconfig                     |   5 +
 images/Makefile.imx                           |   5 +
 9 files changed, 287 insertions(+)
 create mode 100644 arch/arm/boards/kamstrup-mx7-concentrator/Makefile
 create mode 100644 arch/arm/boards/kamstrup-mx7-concentrator/board.c
 create mode 100644 arch/arm/boards/kamstrup-mx7-concentrator/flash-header-tqma7d.imxcfg
 create mode 100644 arch/arm/boards/kamstrup-mx7-concentrator/lowlevel.c
 create mode 100644 arch/arm/dts/imx7d-flex-concentrator-mfg.dts

diff --git a/arch/arm/boards/Makefile b/arch/arm/boards/Makefile
index 9ccb75e27..0e59d6a77 100644
--- a/arch/arm/boards/Makefile
+++ b/arch/arm/boards/Makefile
@@ -63,6 +63,7 @@ obj-$(CONFIG_MACH_HABA_KNX_LITE)		+= haba-knx/
 obj-$(CONFIG_MACH_IMX21ADS)			+= freescale-mx21-ads/
 obj-$(CONFIG_MACH_IMX233_OLINUXINO)		+= imx233-olinuxino/
 obj-$(CONFIG_MACH_IMX27ADS)			+= freescale-mx27-ads/
+obj-$(CONFIG_MACH_KAMSTRUP_MX7_CONCENTRATOR)	+= kamstrup-mx7-concentrator/
 obj-$(CONFIG_MACH_KINDLE3)			+= kindle3/
 obj-$(CONFIG_MACH_KONTRON_SAMX6I)		+= kontron-samx6i/
 obj-$(CONFIG_MACH_LENOVO_IX4_300D)		+= lenovo-ix4-300d/
diff --git a/arch/arm/boards/kamstrup-mx7-concentrator/Makefile b/arch/arm/boards/kamstrup-mx7-concentrator/Makefile
new file mode 100644
index 000000000..a8b45be12
--- /dev/null
+++ b/arch/arm/boards/kamstrup-mx7-concentrator/Makefile
@@ -0,0 +1,2 @@
+obj-y += board.o
+lwl-y += lowlevel.o
\ No newline at end of file
diff --git a/arch/arm/boards/kamstrup-mx7-concentrator/board.c b/arch/arm/boards/kamstrup-mx7-concentrator/board.c
new file mode 100644
index 000000000..ac32e9b05
--- /dev/null
+++ b/arch/arm/boards/kamstrup-mx7-concentrator/board.c
@@ -0,0 +1,51 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+// SPDX-FileCopyrightText: 2021 Kamstrup A/S
+
+/* Author: Lars Pedersen <lapeddk@gmail.com> */
+
+#include <common.h>
+#include <init.h>
+#include <io.h>
+#include <gpio.h>
+#include <restart.h>
+#include <mach/imx7-regs.h>
+#include <mach/iomux-mx7.h>
+#include <mach/generic.h>
+#include <mfd/imx7-iomuxc-gpr.h>
+
+#define BOARD_RESTART_GPIO IMX_GPIO_NR(7, 12)
+#define TPM_RESET_GPIO IMX_GPIO_NR(3, 8)
+
+static void kamstrup_mx7_tpm_reset(void)
+{
+	imx7_setup_pad(MX7D_PAD_LCD_DATA03__GPIO3_IO8);
+
+	gpio_request(TPM_RESET_GPIO, "tpm-reset");
+	gpio_direction_output(TPM_RESET_GPIO, 1);
+	mdelay(100);
+	gpio_set_value(TPM_RESET_GPIO, 0);
+	mdelay(100);
+	gpio_set_value(TPM_RESET_GPIO, 1);
+	gpio_free(TPM_RESET_GPIO);
+}
+
+static void __noreturn kamstrup_mx7_board_restart_gpio(struct restart_handler *rst)
+{
+	imx7_setup_pad(MX7D_PAD_ENET1_TX_CLK__GPIO7_IO12);
+
+	gpio_direction_output(BOARD_RESTART_GPIO, 0);
+	mdelay(1);
+	gpio_set_value(BOARD_RESTART_GPIO, 0);
+
+	hang();
+}
+
+static int kamstrup_mx7_concentrator_coredevices_init(void)
+{
+	kamstrup_mx7_tpm_reset();
+	restart_handler_register_fn("board", kamstrup_mx7_board_restart_gpio);
+	barebox_set_model("Kamstrup OMNIA Concentrator");
+
+	return 0;
+}
+coredevice_initcall(kamstrup_mx7_concentrator_coredevices_init);
diff --git a/arch/arm/boards/kamstrup-mx7-concentrator/flash-header-tqma7d.imxcfg b/arch/arm/boards/kamstrup-mx7-concentrator/flash-header-tqma7d.imxcfg
new file mode 100644
index 000000000..4b3632411
--- /dev/null
+++ b/arch/arm/boards/kamstrup-mx7-concentrator/flash-header-tqma7d.imxcfg
@@ -0,0 +1,79 @@
+soc imx7
+loadaddr 0xbfbff000
+ivtofs 0x400
+
+#include <mach/imx7-ddr-regs.h>
+
+wm 32 0x30340004 0x4F400005 /* IOMUXC_GPR_GPR1 */
+/* Clear then set bit30 to ensure exit from DDR retention */
+wm 32 0x30360388 0x40000000
+wm 32 0x30360384 0x40000000
+
+/* TQMa7x DRAM Timing REV0100 */
+/* DCD Code i.MX7D/S 528 MHz 1 GByte Samsung K4B4G1646D */
+wm 32 0x30360070 0x0070302C /* CCM_ANALOG_PLL_DDRx */
+wm 32  0x30360090 0x00000000 /* CCM_ANALOG_PLL_NUM */
+wm 32  0x30360070 0x0060302C /* CCM_ANALOG_PLL_DDRx */
+check 32 until_all_bits_set 0x30360070 0x80000000
+wm 32 0x30391000 0x00000002 /* SRC_DDRC_RCR */
+
+wm 32 MX7_DDRC_MSTR 0x01040001
+wm 32 MX7_DDRC_DFIUPD0 0x80400003
+wm 32 MX7_DDRC_DFIUPD1 0x00100020
+wm 32 MX7_DDRC_DFIUPD2 0x80100004
+wm 32 MX7_DDRC_RFSHTMG 0x00200045
+wm 32 MX7_DDRC_MP_PCTRL_0 0x00000001
+wm 32 MX7_DDRC_INIT0 0x00020081
+wm 32 MX7_DDRC_INIT1 0x00680000
+wm 32 MX7_DDRC_INIT3 0x09300004
+wm 32 MX7_DDRC_INIT4 0x00480000
+wm 32 MX7_DDRC_INIT5 0x00100004
+wm 32 MX7_DDRC_RANKCTL 0x0000033F
+wm 32 MX7_DDRC_DRAMTMG0 0x090E0809
+wm 32 MX7_DDRC_DRAMTMG1 0x0007020E
+wm 32 MX7_DDRC_DRAMTMG2 0x03040407
+wm 32 MX7_DDRC_DRAMTMG3 0x00002006
+wm 32 MX7_DDRC_DRAMTMG4 0x04020304
+wm 32 MX7_DDRC_DRAMTMG5 0x03030202
+wm 32 MX7_DDRC_DRAMTMG8 0x00000803
+wm 32 MX7_DDRC_ZQCTL0 0x00800020
+wm 32 MX7_DDRC_DFITMG0 0x02098204
+wm 32 MX7_DDRC_DFITMG1 0x00030303
+wm 32 MX7_DDRC_ADDRMAP0 0x00000016
+wm 32 MX7_DDRC_ADDRMAP1 0x00171717
+wm 32 MX7_DDRC_ADDRMAP4 0x00000F0F
+wm 32 MX7_DDRC_ADDRMAP5 0x04040404
+wm 32 MX7_DDRC_ADDRMAP6 0x0F040404
+wm 32 MX7_DDRC_ODTCFG 0x06000604
+wm 32 MX7_DDRC_ODTMAP 0x00000001
+wm 32 0x30391000 0x00000000 /* SRC_DDRC_RCR */
+wm 32 MX7_DDR_PHY_PHY_CON0 0x17420F40
+wm 32 MX7_DDR_PHY_PHY_CON1 0x10210100
+wm 32 MX7_DDR_PHY_PHY_CON4 0x00060807
+wm 32 MX7_DDR_PHY_MDLL_CON0 0x1010007E
+wm 32 MX7_DDR_PHY_DRVDS_CON0 0x00000924
+/* DDR_PHY_CMD_DESKEW_CON0 not set */
+/* DDR_PHY_CMD_DESKEW_CON1 not set */
+/* DDR_PHY_CMD_DESKEW_CON2 not set */
+/* DDR_PHY_CMD_DESKEW_CON3 not set */
+/* DDR_PHY_LVL_CON0 not set */
+wm 32 MX7_DDR_PHY_OFFSET_RD_CON0 0x0B0B0B0B
+wm 32 MX7_DDR_PHY_OFFSET_WR_CON0 0x06060606
+wm 32 MX7_DDR_PHY_CMD_SDLL_CON0 0x01000010
+wm 32 MX7_DDR_PHY_CMD_SDLL_CON0 0x00000010
+
+wm 32 MX7_DDR_PHY_ZQ_CON0 0x0C407304
+wm 32 MX7_DDR_PHY_ZQ_CON0 0x0C447304
+wm 32 MX7_DDR_PHY_ZQ_CON0 0x0C447306
+check 32 until_all_bits_set MX7_DDR_PHY_ZQ_CON1 0x1 /* ZQ Calibration is finished */
+wm 32 MX7_DDR_PHY_ZQ_CON0 0x0C447304
+wm 32 MX7_DDR_PHY_ZQ_CON0 0x0C407304
+
+wm 32 0x30384130 0x00000000 /* CCM_CCGRn */
+wm 32 0x30340020 0x00000178 /* IOMUXC_GPR_GPR8 */
+wm 32 0x30384130 0x00000002 /* CCM_CCGRn */
+wm 32 0x30790018 0x0000000f /* DDR_PHY_LP_CON0 */
+
+/* DDRC_STAT */
+check 32 until_all_bits_set 0x307a0004 0x1
+
diff --git a/arch/arm/boards/kamstrup-mx7-concentrator/lowlevel.c b/arch/arm/boards/kamstrup-mx7-concentrator/lowlevel.c
new file mode 100644
index 000000000..8cd6d67f7
--- /dev/null
+++ b/arch/arm/boards/kamstrup-mx7-concentrator/lowlevel.c
@@ -0,0 +1,35 @@
+#include <debug_ll.h>
+#include <io.h>
+#include <common.h>
+#include <linux/sizes.h>
+#include <mach/generic.h>
+#include <asm/barebox-arm-head.h>
+#include <asm/barebox-arm.h>
+#include <mach/imx7-ccm-regs.h>
+#include <mach/iomux-mx7.h>
+#include <mach/debug_ll.h>
+#include <asm/cache.h>
+#include <mach/esdctl.h>
+
+extern char __dtb_z_imx7d_flex_concentrator_mfg_start[];
+
+static inline void setup_uart(void)
+{
+	imx7_early_setup_uart_clock();
+
+	imx7_setup_pad(MX7D_PAD_SAI2_TX_BCLK__UART4_DCE_TX);
+
+	imx7_uart_setup_ll();
+
+	putc_ll('>');
+}
+
+ENTRY_FUNCTION(start_kamstrup_mx7_concentrator, r0, r1, r2)
+{
+	imx7_cpu_lowlevel_init();
+
+	if (IS_ENABLED(CONFIG_DEBUG_LL))
+		setup_uart();
+
+	imx7d_barebox_entry(__dtb_z_imx7d_flex_concentrator_mfg_start + get_runtime_offset());
+}
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index d5f61768a..d66b6db07 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -30,6 +30,7 @@ lwl-$(CONFIG_MACH_GRINN_LITEBOARD) += imx6ul-liteboard.dtb.o
 lwl-$(CONFIG_MACH_GUF_SANTARO) += imx6q-guf-santaro.dtb.o
 lwl-$(CONFIG_MACH_GUF_VINCELL) += imx53-guf-vincell.dtb.o imx53-guf-vincell-lt.dtb.o
 lwl-$(CONFIG_MACH_GW_VENTANA) += imx6q-gw54xx.dtb.o
+lwl-$(CONFIG_MACH_KAMSTRUP_MX7_CONCENTRATOR) += imx7d-flex-concentrator-mfg.dtb.o
 lwl-$(CONFIG_MACH_KONTRON_SAMX6I) += imx6q-samx6i.dtb.o \
 					imx6dl-samx6i.dtb.o
 lwl-$(CONFIG_MACH_LENOVO_IX4_300D) += armada-xp-lenovo-ix4-300d-bb.dtb.o
diff --git a/arch/arm/dts/imx7d-flex-concentrator-mfg.dts b/arch/arm/dts/imx7d-flex-concentrator-mfg.dts
new file mode 100644
index 000000000..d174ef725
--- /dev/null
+++ b/arch/arm/dts/imx7d-flex-concentrator-mfg.dts
@@ -0,0 +1,108 @@
+/*
+ * The code contained herein is licensed under the GNU General Public
+ * License. You may obtain a copy of the GNU General Public License
+ * Version 2 or later at the following locations:
+ *
+ * http://www.opensource.org/licenses/gpl-license.html
+ * http://www.gnu.org/copyleft/gpl.html
+ */
+
+#include <arm/imx7d-flex-concentrator-mfg.dts>
+
+/ {
+	chosen {
+		environment {
+			compatible = "barebox,environment";
+			device-path = &environment_emmc;
+		};
+	};
+
+	aliases {
+		state = &state_emmc;
+	};
+
+	state_emmc: state {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "barebox,state";
+		magic = <0x4b414d31>;
+		backend-type = "raw";
+		backend = <&backend_state_emmc>;
+		backend-stridesize = <0x200>;
+
+		bootstate {
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			system0 {
+				#address-cells = <1>;
+				#size-cells = <1>;
+
+				remaining_attempts@0 {
+					reg = <0x0 0x4>;
+					type = "uint32";
+					default = <10>;
+				};
+
+				priority@4 {
+					reg = <0x4 0x4>;
+					type = "uint32";
+					default = <21>;
+				};
+			};
+
+			system1 {
+				#address-cells = <1>;
+				#size-cells = <1>;
+
+				remaining_attempts@8 {
+					reg = <0x8 0x4>;
+					type = "uint32";
+					default = <0>;
+				};
+
+				priority@c {
+					reg = <0xc 0x4>;
+					type = "uint32";
+					default = <20>;
+				};
+			};
+
+			last_chosen@10 {
+				reg = <0x10 0x4>;
+				type = "uint32";
+			};
+		};
+	};
+};
+
+/* eMMC */
+&usdhc3 {
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		partition@0 {
+			label = "barebox";
+			reg = <0x0 0x100000>;
+		};
+
+		environment_emmc: partition@100000 {
+			label = "barebox-environment";
+			reg = <0x100000 0x100000>;
+		};
+
+		backend_state_emmc: partition@200000 {
+			label = "barebox-state";
+			reg = <0x200000 0x100000>;
+		};
+	};
+};
+
+/* FIXME: barebox serial is broken when barebox applies requested reparenting */
+&uart4 {
+	/delete-property/ assigned-clocks;
+	/delete-property/ assigned-clock-parents;
+};
+
diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index 3f8012c73..cc73d0a0d 100644
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -526,6 +526,11 @@ config MACH_FREESCALE_MX7_SABRESD
 
 	  https://goo.gl/6EKGdk
 
+config MACH_KAMSTRUP_MX7_CONCENTRATOR
+	bool "Kamstrup i.MX7 Concentrator"
+	select ARCH_IMX7
+	select ARM_USE_COMPRESSED_DTB
+
 config MACH_NXP_IMX6ULL_EVK
 	bool "NXP i.MX6ull EVK Board"
 	select ARCH_IMX6UL
diff --git a/images/Makefile.imx b/images/Makefile.imx
index b892ec019..bc5ad1c7c 100644
--- a/images/Makefile.imx
+++ b/images/Makefile.imx
@@ -403,6 +403,11 @@ CFG_start_zii_imx7d_dev.pblb.imximg = $(board)/zii-imx7d-dev/flash-header-zii-im
 FILE_barebox-zii-imx7d-dev.img = start_zii_imx7d_dev.pblb.imximg
 image-$(CONFIG_MACH_ZII_IMX7D_DEV) += barebox-zii-imx7d-dev.img
 
+pblb-$(CONFIG_MACH_KAMSTRUP_MX7_CONCENTRATOR) += start_kamstrup_mx7_concentrator
+CFG_start_kamstrup_mx7_concentrator.pblb.imximg = $(board)/kamstrup-mx7-concentrator/flash-header-tqma7d.imxcfg
+FILE_barebox-kamstrup-mx7-concentrator.img = start_kamstrup_mx7_concentrator.pblb.imximg
+image-$(CONFIG_MACH_KAMSTRUP_MX7_CONCENTRATOR) += barebox-kamstrup-mx7-concentrator.img
+
 # ----------------------- i.MX8mm based boards --------------------------
 pblb-$(CONFIG_MACH_NXP_IMX8MM_EVK) += start_nxp_imx8mm_evk
 CFG_start_nxp_imx8mm_evk.pblb.imximg = $(board)/nxp-imx8mm-evk/flash-header-imx8mm-evk.imxcfg
-- 
2.30.2


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