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-rw-r--r--drivers/usb/storage/initializers.c94
1 files changed, 94 insertions, 0 deletions
diff --git a/drivers/usb/storage/initializers.c b/drivers/usb/storage/initializers.c
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+// 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;
+}