[PATCH v4 1/2] mx7ulp: add base SPL support for mx7ulp

[Oleksandr Suvorov]

From: Ricardo Salveti <ricardo at foundries.io>

Add a base implementation of mx7ulp SPL config header and soc,
and changes in makefiles in order to allow building SPL on mx7ulp
based devices.

Signed-off-by: Ricardo Salveti <ricardo at foundries.io>
Co-developed-by: Oleksandr Suvorov <oleksandr.suvorov at foundries.io>
Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov at foundries.io>
---

Changes in v4:
- rebase to the current master
- fix a reference to a non-existent option SPL_MMC_SUPPORT

Changes in v3:
- rebase the patch to the current codebase

 arch/arm/mach-imx/Makefile     |  2 +-
 arch/arm/mach-imx/mx7ulp/soc.c |  2 +-
 arch/arm/mach-imx/spl.c        |  6 ++++--
 include/configs/imx7ulp_spl.h  | 39 ++++++++++++++++++++++++++++++++++
 4 files changed, 45 insertions(+), 4 deletions(-)
 create mode 100644 include/configs/imx7ulp_spl.h

diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile
index 80c497e6d81..71e6cac2f63 100644
--- a/arch/arm/mach-imx/Makefile
+++ b/arch/arm/mach-imx/Makefile
@@ -29,7 +29,7 @@ endif
 obj-$(CONFIG_GPT_TIMER) += timer.o
 obj-$(CONFIG_SYS_I2C_MXC) += i2c-mxv7.o
 endif
-ifeq ($(SOC),$(filter $(SOC),mx7 mx6 mxs imx8m imx8 imx9 imxrt))
+ifeq ($(SOC),$(filter $(SOC),mx7 mx7ulp mx6 mxs imx8m imx8 imx9 imxrt))
 obj-y	+= misc.o
 obj-$(CONFIG_CMD_PRIBLOB) += priblob.o
 obj-$(CONFIG_SPL_BUILD)	+= spl.o
diff --git a/arch/arm/mach-imx/mx7ulp/soc.c b/arch/arm/mach-imx/mx7ulp/soc.c
index 217b7c45867..951b1888c58 100644
--- a/arch/arm/mach-imx/mx7ulp/soc.c
+++ b/arch/arm/mach-imx/mx7ulp/soc.c
@@ -234,7 +234,7 @@ void s_init(void)
 }
 #endif
 
-#ifndef CONFIG_ULP_WATCHDOG
+#if !CONFIG_IS_ENABLED(ULP_WATCHDOG) || CONFIG_IS_ENABLED(SPL_BUILD)
 void reset_cpu(void)
 {
 	setbits_le32(SIM0_RBASE, SIM_SOPT1_A7_SW_RESET);
diff --git a/arch/arm/mach-imx/spl.c b/arch/arm/mach-imx/spl.c
index ef00969a5e0..bca0b1123a7 100644
--- a/arch/arm/mach-imx/spl.c
+++ b/arch/arm/mach-imx/spl.c
@@ -147,7 +147,7 @@ u32 spl_boot_device(void)
 	return BOOT_DEVICE_NONE;
 }
 
-#elif defined(CONFIG_MX7) || defined(CONFIG_IMX8M) || defined(CONFIG_IMX8) || defined(CONFIG_IMX9)
+#elif defined(CONFIG_MX7) || defined(CONFIG_MX7ULP) || defined(CONFIG_IMX8M) || defined(CONFIG_IMX8) || defined(CONFIG_IMX9)
 /* Translate iMX7/i.MX8M boot device to the SPL boot device enumeration */
 u32 spl_boot_device(void)
 {
@@ -160,7 +160,9 @@ u32 spl_boot_device(void)
 	 */
 	if (((bmode >> 24) & 0x03) == 0x01) /* Serial Downloader */
 		return BOOT_DEVICE_BOARD;
+#endif
 
+#if defined(CONFIG_MX7) || defined(CONFIG_MX7ULP)
 	/*
 	 * The above method does not detect that the boot ROM used
 	 * serial downloader in case the boot ROM decided to use the
@@ -178,7 +180,7 @@ u32 spl_boot_device(void)
 
 	return spl_board_boot_device(boot_device_spl);
 }
-#endif /* CONFIG_MX7 || CONFIG_IMX8M || CONFIG_IMX8 */
+#endif /* CONFIG_MX7 || CONFIG_MX7ULP || CONFIG_IMX8M || CONFIG_IMX8 */
 
 #ifdef CONFIG_SPL_USB_GADGET
 int g_dnl_bind_fixup(struct usb_device_descriptor *dev, const char *name)
diff --git a/include/configs/imx7ulp_spl.h b/include/configs/imx7ulp_spl.h
new file mode 100644
index 00000000000..516238ec02e
--- /dev/null
+++ b/include/configs/imx7ulp_spl.h
@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * SPL definitions for the i.MX7ULP SPL
+ *
+ * (C) Copyright 2019 Foundries.io
+ */
+
+#ifndef __IMX7ULP_SPL_CONFIG_H
+#define __IMX7ULP_SPL_CONFIG_H
+
+#if CONFIG_IS_ENABLED(SPL)
+/*
+ * see figure 35-5 in i.MX 7ULP Reference manual:
+ *  - IMX7ULP A7 OCRAM free area RAM is from 0x2F010000 to 0x2F03FF00.
+ *  - Set the stack at the end of the free area section, at 0x2003FEB8.
+ *  - The BOOT ROM loads what they consider the firmware image
+ *    which consists of a 4K header in front of us that contains the IVT, DCD,
+ *    and some padding thus 'our' max size is really 0x2F03FF00 - 0x2F011000.
+ *    187KB is more than enough for the SPL.
+ */
+#define CONFIG_SPL_STACK		0x2F03FEB8
+
+/* MMC support */
+#if CONFIG_IS_ENABLED(SPL_MMC)
+#define CONFIG_SYS_MMCSD_FS_BOOT_PARTITION	1
+#define CONFIG_SYS_MONITOR_LEN			409600	/* 400 KB */
+#endif
+
+/* Define the payload for FAT/EXT support */
+#if CONFIG_IS_ENABLED(SPL_FS_FAT) || CONFIG_IS_ENABLED(SPL_FS_EXT4)
+#define CONFIG_SPL_FS_LOAD_PAYLOAD_NAME	"u-boot-dtb.img"
+#endif
+
+#define CONFIG_SYS_SPL_MALLOC_START    0x68300000
+#define CONFIG_SYS_SPL_MALLOC_SIZE     0x100000		/* 1 MB */
+
+#endif /* CONFIG_SPL */
+
+#endif /* __IMX7ULP_SPL_CONFIG_H */
-- 
2.37.1