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

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

Hi Oleksandr, Ricardo,

On 05.08.22 20:19, Oleksandr Suvorov wrote:
> From: Ricardo Salveti <ricardo@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@foundries.io>
> Co-developed-by: Oleksandr Suvorov <oleksandr.suvorov@foundries.io>
> Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@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

This should be in defconfig and it is not accepted anymore in header, it 
raises an error. See :

https://source.denx.de/u-boot/custodians/u-boot-imx/-/jobs/516648

Best regards,
Stefano


> +#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 */

> From: Ricardo Salveti <ricardo@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@foundries.io>
> Co-developed-by: Oleksandr Suvorov <oleksandr.suvorov@foundries.io>
> Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@foundries.io>
Applied to u-boot-imx, master, thanks !

Best regards,
Stefano Babic