Initial import

1 files changed, 236 insertions, 0 deletions

diff --git a/drivers/usb/storage/karma.c b/drivers/usb/storage/karma.c
new file mode 100644
index 000000000..94d16ee5e
--- /dev/null
+++ b/drivers/usb/storage/karma.c
@@ -0,0 +1,236 @@
+/* Driver for Rio Karma
+ *
+ *   (c) 2006 Bob Copeland <me@bobcopeland.com>
+ *   (c) 2006 Keith Bennett <keith@mcs.st-and.ac.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+
+#include "usb.h"
+#include "transport.h"
+#include "debug.h"
+
+MODULE_DESCRIPTION("Driver for Rio Karma");
+MODULE_AUTHOR("Bob Copeland <me@bobcopeland.com>, Keith Bennett <keith@mcs.st-and.ac.uk>");
+MODULE_LICENSE("GPL");
+
+#define RIO_PREFIX "RIOP\x00"
+#define RIO_PREFIX_LEN 5
+#define RIO_SEND_LEN 40
+#define RIO_RECV_LEN 0x200
+
+#define RIO_ENTER_STORAGE 0x1
+#define RIO_LEAVE_STORAGE 0x2
+#define RIO_RESET 0xC
+
+struct karma_data {
+	int in_storage;
+	char *recv;
+};
+
+static int rio_karma_init(struct us_data *us);
+
+
+/*
+ * The table of devices
+ */
+#define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
+		    vendorName, productName, useProtocol, useTransport, \
+		    initFunction, flags) \
+{ USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
+  .driver_info = (flags) }
+
+static struct usb_device_id karma_usb_ids[] = {
+#	include "unusual_karma.h"
+	{ }		/* Terminating entry */
+};
+MODULE_DEVICE_TABLE(usb, karma_usb_ids);
+
+#undef UNUSUAL_DEV
+
+/*
+ * The flags table
+ */
+#define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
+		    vendor_name, product_name, use_protocol, use_transport, \
+		    init_function, Flags) \
+{ \
+	.vendorName = vendor_name,	\
+	.productName = product_name,	\
+	.useProtocol = use_protocol,	\
+	.useTransport = use_transport,	\
+	.initFunction = init_function,	\
+}
+
+static struct us_unusual_dev karma_unusual_dev_list[] = {
+#	include "unusual_karma.h"
+	{ }		/* Terminating entry */
+};
+
+#undef UNUSUAL_DEV
+
+
+/*
+ * Send commands to Rio Karma.
+ *
+ * For each command we send 40 bytes starting 'RIOP\0' followed by
+ * the command number and a sequence number, which the device will ack
+ * with a 512-byte packet with the high four bits set and everything
+ * else null.  Then we send 'RIOP\x80' followed by a zero and the
+ * sequence number, until byte 5 in the response repeats the sequence
+ * number.
+ */
+static int rio_karma_send_command(char cmd, struct us_data *us)
+{
+	int result, partial;
+	unsigned long timeout;
+	static unsigned char seq = 1;
+	struct karma_data *data = (struct karma_data *) us->extra;
+
+	usb_stor_dbg(us, "sending command %04x\n", cmd);
+	memset(us->iobuf, 0, RIO_SEND_LEN);
+	memcpy(us->iobuf, RIO_PREFIX, RIO_PREFIX_LEN);
+	us->iobuf[5] = cmd;
+	us->iobuf[6] = seq;
+
+	timeout = jiffies + msecs_to_jiffies(6000);
+	for (;;) {
+		result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
+			us->iobuf, RIO_SEND_LEN, &partial);
+		if (result != USB_STOR_XFER_GOOD)
+			goto err;
+
+		result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
+			data->recv, RIO_RECV_LEN, &partial);
+		if (result != USB_STOR_XFER_GOOD)
+			goto err;
+
+		if (data->recv[5] == seq)
+			break;
+
+		if (time_after(jiffies, timeout))
+			goto err;
+
+		us->iobuf[4] = 0x80;
+		us->iobuf[5] = 0;
+		msleep(50);
+	}
+
+	seq++;
+	if (seq == 0)
+		seq = 1;
+
+	usb_stor_dbg(us, "sent command %04x\n", cmd);
+	return 0;
+err:
+	usb_stor_dbg(us, "command %04x failed\n", cmd);
+	return USB_STOR_TRANSPORT_FAILED;
+}
+
+/*
+ * Trap START_STOP and READ_10 to leave/re-enter storage mode.
+ * Everything else is propagated to the normal bulk layer.
+ */
+static int rio_karma_transport(struct scsi_cmnd *srb, struct us_data *us)
+{
+	int ret;
+	struct karma_data *data = (struct karma_data *) us->extra;
+
+	if (srb->cmnd[0] == READ_10 && !data->in_storage) {
+		ret = rio_karma_send_command(RIO_ENTER_STORAGE, us);
+		if (ret)
+			return ret;
+
+		data->in_storage = 1;
+		return usb_stor_Bulk_transport(srb, us);
+	} else if (srb->cmnd[0] == START_STOP) {
+		ret = rio_karma_send_command(RIO_LEAVE_STORAGE, us);
+		if (ret)
+			return ret;
+
+		data->in_storage = 0;
+		return rio_karma_send_command(RIO_RESET, us);
+	}
+	return usb_stor_Bulk_transport(srb, us);
+}
+
+static void rio_karma_destructor(void *extra)
+{
+	struct karma_data *data = (struct karma_data *) extra;
+	kfree(data->recv);
+}
+
+static int rio_karma_init(struct us_data *us)
+{
+	int ret = 0;
+	struct karma_data *data = kzalloc(sizeof(struct karma_data), GFP_NOIO);
+	if (!data)
+		goto out;
+
+	data->recv = kmalloc(RIO_RECV_LEN, GFP_NOIO);
+	if (!data->recv) {
+		kfree(data);
+		goto out;
+	}
+
+	us->extra = data;
+	us->extra_destructor = rio_karma_destructor;
+	ret = rio_karma_send_command(RIO_ENTER_STORAGE, us);
+	data->in_storage = (ret == 0);
+out:
+	return ret;
+}
+
+static int karma_probe(struct usb_interface *intf,
+			 const struct usb_device_id *id)
+{
+	struct us_data *us;
+	int result;
+
+	result = usb_stor_probe1(&us, intf, id,
+			(id - karma_usb_ids) + karma_unusual_dev_list);
+	if (result)
+		return result;
+
+	us->transport_name = "Rio Karma/Bulk";
+	us->transport = rio_karma_transport;
+	us->transport_reset = usb_stor_Bulk_reset;
+
+	result = usb_stor_probe2(us);
+	return result;
+}
+
+static struct usb_driver karma_driver = {
+	.name =		"ums-karma",
+	.probe =	karma_probe,
+	.disconnect =	usb_stor_disconnect,
+	.suspend =	usb_stor_suspend,
+	.resume =	usb_stor_resume,
+	.reset_resume =	usb_stor_reset_resume,
+	.pre_reset =	usb_stor_pre_reset,
+	.post_reset =	usb_stor_post_reset,
+	.id_table =	karma_usb_ids,
+	.soft_unbind =	1,
+	.no_dynamic_id = 1,
+};
+
+module_usb_driver(karma_driver);