summaryrefslogtreecommitdiff
path: root/include/ufs.h
diff options
context:
space:
mode:
authorFaiz Abbas <faiz_abbas@ti.com>2019-10-15 18:24:36 +0530
committerTom Rini <trini@konsulko.com>2019-10-23 20:47:12 -0400
commit7feafb0ae4f703874119bd90d53258134f850d37 (patch)
tree334f27963392e1b9dcc4db93017eb10725b2c39a /include/ufs.h
parent8fbac8e23e55a63c218b8d737e629a8d07e9a840 (diff)
ufs: Add Initial Support for UFS subsystem
Add Support for UFS Host Controller Interface (UFSHCI) for communicating with Universal Flash Storage (UFS) devices. The steps to initialize the host controller interface are the following: - Initiate the Host Controller Initialization process by writing to the Host controller enable register. - Configure the Host Controller base address registers by allocating a host memory space and related data structures. - Unipro link startup procedure - Check for connected device - Configure UFS host controller to process requests Also register this host controller as a SCSI host controller. Taken from Linux Kernel v5.2 (drivers/scsi/ufs/ufshcd.c) and ported to U-boot. Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Diffstat (limited to 'include/ufs.h')
-rw-r--r--include/ufs.h29
1 files changed, 29 insertions, 0 deletions
diff --git a/include/ufs.h b/include/ufs.h
new file mode 100644
index 0000000000..0592a763dd
--- /dev/null
+++ b/include/ufs.h
@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+#ifndef _UFS_H
+#define _UFS_H
+/**
+ * ufs_probe() - initialize all devices in the UFS uclass
+ *
+ * @return 0 if Ok, -ve on error
+ */
+int ufs_probe(void);
+
+/**
+ * ufs_probe_dev() - initialize a particular device in the UFS uclass
+ *
+ * @index: index in the uclass sequence
+ *
+ * @return 0 if successfully probed, -ve on error
+ */
+int ufs_probe_dev(int index);
+
+/*
+ * ufs_scsi_bind() - Create a new scsi device as a child of the UFS device and
+ * bind it to the ufs_scsi driver
+ * @ufs_dev: UFS device
+ * @scsi_devp: Pointer to scsi device
+ *
+ * @return 0 if Ok, -ve on error
+ */
+int ufs_scsi_bind(struct udevice *ufs_dev, struct udevice **scsi_devp);
+#endif