1 files changed, 94 insertions, 0 deletions
diff --git a/drivers/usb/storage/initializers.c b/drivers/usb/storage/initializers.c
new file mode 100644
index 0000000000..f8f9ce8dc7
--- /dev/null
+++ b/drivers/usb/storage/initializers.c
@@ -0,0 +1,94 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Special Initializers for certain USB Mass Storage devices
+ *
+ * Current development and maintenance by:
+ *   (c) 1999, 2000 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
+ *
+ * This driver is based on the 'USB Mass Storage Class' document. This
+ * describes in detail the protocol used to communicate with such
+ * devices.  Clearly, the designers had SCSI and ATAPI commands in
+ * mind when they created this document.  The commands are all very
+ * similar to commands in the SCSI-II and ATAPI specifications.
+ *
+ * It is important to note that in a number of cases this class
+ * exhibits class-specific exemptions from the USB specification.
+ * Notably the usage of NAK, STALL and ACK differs from the norm, in
+ * that they are used to communicate wait, failed and OK on commands.
+ *
+ * Also, for certain devices, the interrupt endpoint is used to convey
+ * status of a command.
+ */
+
+#include <linux/errno.h>
+
+#include "usb.h"
+#include "initializers.h"
+#include "debug.h"
+#include "transport.h"
+
+/*
+ * This places the Shuttle/SCM USB<->SCSI bridge devices in multi-target
+ * mode
+ */
+int usb_stor_euscsi_init(struct us_data *us)
+{
+	int result;
+
+	usb_stor_dbg(us, "Attempting to init eUSCSI bridge...\n");
+	result = usb_stor_control_msg(us, us->send_ctrl_pipe,
+			0x0C, USB_RECIP_INTERFACE | USB_TYPE_VENDOR,
+			0x01, 0x0, NULL, 0x0, 5 * HZ);
+	usb_stor_dbg(us, "-- result is %d\n", result);
+
+	return 0;
+}
+
+/*
+ * This function is required to activate all four slots on the UCR-61S2B
+ * flash reader
+ */
+int usb_stor_ucr61s2b_init(struct us_data *us)
+{
+	struct bulk_cb_wrap *bcb = (struct bulk_cb_wrap*) us->iobuf;
+	struct bulk_cs_wrap *bcs = (struct bulk_cs_wrap*) us->iobuf;
+	int res;
+	unsigned int partial;
+	static char init_string[] = "\xec\x0a\x06\x00$PCCHIPS";
+
+	usb_stor_dbg(us, "Sending UCR-61S2B initialization packet...\n");
+
+	bcb->Signature = cpu_to_le32(US_BULK_CB_SIGN);
+	bcb->Tag = 0;
+	bcb->DataTransferLength = cpu_to_le32(0);
+	bcb->Flags = bcb->Lun = 0;
+	bcb->Length = sizeof(init_string) - 1;
+	memset(bcb->CDB, 0, sizeof(bcb->CDB));
+	memcpy(bcb->CDB, init_string, sizeof(init_string) - 1);
+
+	res = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, bcb,
+			US_BULK_CB_WRAP_LEN, &partial);
+	if (res)
+		return -EIO;
+
+	usb_stor_dbg(us, "Getting status packet...\n");
+	res = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs,
+			US_BULK_CS_WRAP_LEN, &partial);
+	if (res)
+		return -EIO;
+
+	return 0;
+}
+
+/* This places the HUAWEI E220 devices in multi-port mode */
+int usb_stor_huawei_e220_init(struct us_data *us)
+{
+	int result;
+
+	result = usb_stor_control_msg(us, us->send_ctrl_pipe,
+				      USB_REQ_SET_FEATURE,
+				      USB_TYPE_STANDARD | USB_RECIP_DEVICE,
+				      0x01, 0x0, NULL, 0x0, 1 * HZ);
+	usb_stor_dbg(us, "Huawei mode set result is %d\n", result);
+	return 0;
+}