[U-Boot] [PATCH 2/6] dm: implement a SATA uclass

[Mugunthan V N]

Implement a SATA uclass that can represent a SATA controller.

Signed-off-by: Mugunthan V N <mugunthanvnm at ti.com>
---
 drivers/block/Kconfig       | 10 +++++++
 drivers/block/Makefile      |  2 ++
 drivers/block/sata-uclass.c | 69 +++++++++++++++++++++++++++++++++++++++++++++
 include/dm/uclass-id.h      |  1 +
 4 files changed, 82 insertions(+)
 create mode 100644 drivers/block/sata-uclass.c

diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig
index e69de29..44d8a6b 100644
--- a/drivers/block/Kconfig
+++ b/drivers/block/Kconfig
@@ -0,0 +1,10 @@
+menu "SATA Device Support"
+
+config SATA
+	bool "Enable driver model for SATA drivers"
+	depends on DM
+	help
+	  Enable driver model for block devices like SCSI. It uses the
+	  same API as block, but now implemented by the uclass.
+
+endmenu
diff --git a/drivers/block/Makefile b/drivers/block/Makefile
index eb8bda9..c2dae17 100644
--- a/drivers/block/Makefile
+++ b/drivers/block/Makefile
@@ -5,6 +5,8 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
+obj-$(CONFIG_SATA) += sata-uclass.o
+
 obj-$(CONFIG_SCSI_AHCI) += ahci.o
 obj-$(CONFIG_DWC_AHSATA) += dwc_ahsata.o
 obj-$(CONFIG_FSL_SATA) += fsl_sata.o
diff --git a/drivers/block/sata-uclass.c b/drivers/block/sata-uclass.c
new file mode 100644
index 0000000..62773b6
--- /dev/null
+++ b/drivers/block/sata-uclass.c
@@ -0,0 +1,69 @@
+/*
+ * SATA device U-Class driver
+ *
+ * (C) Copyright 2016
+ *     Texas Instruments Incorporated, <www.ti.com>
+ *
+ * Author: Mugunthan V N <mugunthanvnm at ti.com>
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <dm/uclass-internal.h>
+#include <dm/device-internal.h>
+#include <errno.h>
+#include <scsi.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*
+ * struct mmc_uclass_priv - Holds information about a device used by the uclass
+ */
+struct sata_uclass_priv {
+	struct block_dev_desc_t *block_dev;
+};
+
+int scsi_get_device(int index, struct udevice **devp)
+{
+	struct udevice *dev;
+	int ret;
+
+	ret = uclass_find_device(UCLASS_SATA, index, &dev);
+	if (ret || !dev) {
+		printf("%d device not found\n", index);
+		return ret;
+	}
+
+	ret = device_probe(dev);
+	if (ret) {
+		error("device probe error\n");
+		return ret;
+	}
+
+	*devp = dev;
+
+	return ret;
+}
+
+void scsi_init(void)
+{
+	struct udevice *dev;
+	int ret;
+
+	ret = scsi_get_device(0, &dev);
+	if (ret || !dev) {
+		error("scsi device not found\n");
+		return;
+	}
+
+	scsi_scan(1);
+}
+
+UCLASS_DRIVER(sata) = {
+	.id		= UCLASS_SATA,
+	.name		= "sata",
+	.flags		= DM_UC_FLAG_SEQ_ALIAS,
+	.per_device_auto_alloc_size = sizeof(struct sata_uclass_priv),
+};
diff --git a/include/dm/uclass-id.h b/include/dm/uclass-id.h
index 27fa0b6..80977ca 100644
--- a/include/dm/uclass-id.h
+++ b/include/dm/uclass-id.h
@@ -55,6 +55,7 @@ enum uclass_id {
 	UCLASS_RESET,		/* Reset device */
 	UCLASS_REMOTEPROC,	/* Remote Processor device */
 	UCLASS_RTC,		/* Real time clock device */
+	UCLASS_SATA,		/* SATA devices */
 	UCLASS_SERIAL,		/* Serial UART */
 	UCLASS_SPI,		/* SPI bus */
 	UCLASS_SPI_FLASH,	/* SPI flash */
-- 
2.7.0.rc3