[U-Boot] [uBoot 1/2] common: spl: Add spl sata boot support

[Roger Quadros <rogerq@ti.com>]

Hi Dan,

On 01/28/2014 10:01 PM, Dan Murphy wrote:
> Add spl_sata to read a fat partition from a bootable SATA
> drive.
> 
> Signed-off-by: Dan Murphy <dmurphy@ti.com>
> ---
>  common/Makefile       |    3 +++
>  common/cmd_scsi.c     |    2 ++
>  common/spl/Makefile   |    1 +
>  common/spl/spl.c      |    5 +++++
>  common/spl/spl_sata.c |   51 +++++++++++++++++++++++++++++++++++++++++++++++++
>  include/spl.h         |    3 +++
>  spl/Makefile          |    1 +
>  7 files changed, 66 insertions(+)
>  create mode 100644 common/spl/spl_sata.c
> 
> diff --git a/common/Makefile b/common/Makefile
> index 4d99ecd..b0f5b62 100644
> --- a/common/Makefile
> +++ b/common/Makefile
> @@ -201,6 +201,9 @@ ifdef CONFIG_SPL_USB_HOST_SUPPORT
>  obj-$(CONFIG_SPL_USB_SUPPORT) += usb.o usb_hub.o
>  obj-$(CONFIG_USB_STORAGE) += usb_storage.o
>  endif
> +ifdef CONFIG_SPL_SATA_SUPPORT
> +obj-$(CONFIG_CMD_SCSI) += cmd_scsi.o
> +endif
>  ifneq ($(CONFIG_SPL_NET_SUPPORT),y)
>  obj-$(CONFIG_ENV_IS_NOWHERE) += env_nowhere.o
>  obj-$(CONFIG_ENV_IS_IN_MMC) += env_mmc.o
> diff --git a/common/cmd_scsi.c b/common/cmd_scsi.c
> index 7b97dc9..b3f7687 100644
> --- a/common/cmd_scsi.c
> +++ b/common/cmd_scsi.c
> @@ -168,7 +168,9 @@ removable:
>  		scsi_curr_dev = -1;
>  
>  	printf("Found %d device(s).\n", scsi_max_devs);
> +#ifndef CONFIG_SPL_BUILD
>  	setenv_ulong("scsidevs", scsi_max_devs);
> +#endif
>  }
>  
>  int scsi_get_disk_count(void)
> diff --git a/common/spl/Makefile b/common/spl/Makefile
> index 65a1484f..64569c2 100644
> --- a/common/spl/Makefile
> +++ b/common/spl/Makefile
> @@ -18,4 +18,5 @@ obj-$(CONFIG_SPL_NET_SUPPORT) += spl_net.o
>  obj-$(CONFIG_SPL_MMC_SUPPORT) += spl_mmc.o
>  obj-$(CONFIG_SPL_USB_SUPPORT) += spl_usb.o
>  obj-$(CONFIG_SPL_FAT_SUPPORT) += spl_fat.o
> +obj-$(CONFIG_SPL_SATA_SUPPORT) += spl_sata.o
>  endif
> diff --git a/common/spl/spl.c b/common/spl/spl.c
> index 0645cee..774fdad 100644
> --- a/common/spl/spl.c
> +++ b/common/spl/spl.c
> @@ -210,6 +210,11 @@ void board_init_r(gd_t *dummy1, ulong dummy2)
>  		spl_usb_load_image();
>  		break;
>  #endif
> +#ifdef CONFIG_SPL_SATA_SUPPORT
> +	case BOOT_DEVICE_SATA:
> +		spl_sata_load_image();
> +		break;
> +#endif
>  	default:
>  		debug("SPL: Un-supported Boot Device\n");
>  		hang();
> diff --git a/common/spl/spl_sata.c b/common/spl/spl_sata.c
> new file mode 100644
> index 0000000..88d6b06
> --- /dev/null
> +++ b/common/spl/spl_sata.c
> @@ -0,0 +1,51 @@
> +/*
> + * (C) Copyright 2013
> + * Texas Instruments, <www.ti.com>
> + *
> + * Dan Murphy <dmurphy@ti.com>
> + *
> + * SPDX-License-Identifier:	GPL-2.0+
> + *
> + * Derived work from spl_usb.c
> + */
> +
> +#include <common.h>
> +#include <spl.h>
> +#include <asm/u-boot.h>
> +#include <sata.h>
> +#include <fat.h>
> +#include <version.h>
> +#include <image.h>
> +
> +DECLARE_GLOBAL_DATA_PTR;
> +
> +void spl_sata_load_image(void)
> +{
> +	int err;
> +	block_dev_desc_t *stor_dev;
> +
> +	err = init_sata(CONFIG_SPL_SATA_BOOT_DEVICE);
> +	if (err) {
> +#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
> +		printf("spl: sata init failed: err - %d\n", err);

Why the conditional print only if CONFIG_SPL_LIBCOMMON_SUPPORT.

> +#endif
> +		hang();
> +	} else {
> +		/* try to recognize storage devices immediately */
> +		stor_dev = scsi_get_dev(0);
> +	}
> +
> +	debug("boot mode - FAT\n");

Do you really need this debug message? If yes could it be more descriptive like printing function name
to point out where it comes from?

> +
> +#ifdef CONFIG_SPL_OS_BOOT
> +	if (spl_start_uboot() || spl_load_image_fat_os(stor_dev,
> +									CONFIG_SYS_SATA_FAT_BOOT_PARTITION))
> +#endif
> +	err = spl_load_image_fat(stor_dev,

Do you need to tab space this to align with the above if statement?

> +				CONFIG_SYS_SATA_FAT_BOOT_PARTITION,
> +				CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME);

Just cross checking. If CONFIG_SPL_OS_BOOT is defined then you need to call
both spl_load_image_fat_os() as well as spl_load_image_fat ?

> +	if (err) {
> +		puts("Error loading sata device\n");
> +		hang();
> +	}
> +}
> diff --git a/include/spl.h b/include/spl.h
> index 5e24856..ee09fb6 100644
> --- a/include/spl.h
> +++ b/include/spl.h
> @@ -64,6 +64,9 @@ void spl_net_load_image(const char *device);
>  /* USB SPL functions */
>  void spl_usb_load_image(void);
>  
> +/* SATA SPL functions */
> +void spl_sata_load_image(void);
> +
>  /* SPL FAT image functions */
>  int spl_load_image_fat(block_dev_desc_t *block_dev, int partition, const char *filename);
>  int spl_load_image_fat_os(block_dev_desc_t *block_dev, int partition);
> diff --git a/spl/Makefile b/spl/Makefile
> index 4143e38..28fcfdd 100644
> --- a/spl/Makefile
> +++ b/spl/Makefile
> @@ -85,6 +85,7 @@ LIBS-$(CONFIG_SPL_USBETH_SUPPORT) += drivers/usb/gadget/
>  LIBS-$(CONFIG_SPL_WATCHDOG_SUPPORT) += drivers/watchdog/
>  LIBS-$(CONFIG_SPL_USB_HOST_SUPPORT) += drivers/usb/host/
>  LIBS-$(CONFIG_OMAP_USB_PHY) += drivers/usb/phy/
> +LIBS-$(CONFIG_SPL_SATA_SUPPORT) += drivers/block/
>  
>  ifneq (,$(CONFIG_MX23)$(CONFIG_MX35)$(filter $(SOC), mx25 mx27 mx5 mx6 mx31 mx35))
>  LIBS-y += arch/$(ARCH)/imx-common/
> 

cheers,
-roger