common: spl: Add spl sata boot support

Add spl_sata to read a fat partition from a bootable SATA
drive.

Signed-off-by: Dan Murphy <dmurphy@ti.com>
Reviewed-by: Roger Quadros <rogerq@ti.com>

common/Makefile

@@ -202,6 +202,9 @@ 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

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)

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

common/spl/spl.c

@@ -209,6 +209,11 @@ void board_init_r(gd_t *dummy1, ulong dummy2)
 	case BOOT_DEVICE_USB:
 		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");

common/spl/spl_sata.c

@@ -0,0 +1,49 @@
+/*
+ * (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);
+#endif
+		hang();
+	} else {
+		/* try to recognize storage devices immediately */
+		stor_dev = scsi_get_dev(0);
+	}
+
+#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,
+				CONFIG_SYS_SATA_FAT_BOOT_PARTITION,
+				CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME);
+	if (err) {
+		puts("Error loading sata device\n");
+		hang();
+	}
+}

include/spl.h

@@ -65,6 +65,9 @@ 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);

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/