[PATCH] USB: usb-storage: Add support for Rio Karma
This patch from Bob Copeland adds support for the Rio Karma portable
digital audio player to the usb-storage driver. The only thing needed to
support this device is a one-time (per plugin) init command which is sent
to the device.
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: Matthew Dharm <mdharm-usb@one-eyed-alien.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/storage/initializers.c b/drivers/usb/storage/initializers.c
index 5b06f92..ab173b3 100644
--- a/drivers/usb/storage/initializers.c
+++ b/drivers/usb/storage/initializers.c
@@ -45,6 +45,12 @@
#include "debug.h"
#include "transport.h"
+#define RIO_MSC 0x08
+#define RIOP_INIT "RIOP\x00\x01\x08"
+#define RIOP_INIT_LEN 7
+#define RIO_SEND_LEN 40
+#define RIO_RECV_LEN 0x200
+
/* This places the Shuttle/SCM USB<->SCSI bridge devices in multi-target
* mode */
int usb_stor_euscsi_init(struct us_data *us)
@@ -91,3 +97,70 @@
return (res ? -1 : 0);
}
+
+/* Place the Rio Karma into mass storage mode.
+ *
+ * The initialization begins by sending 40 bytes starting
+ * RIOP\x00\x01\x08\x00, which the device will ack with a 512-byte
+ * packet with the high four bits set and everything else null.
+ *
+ * Next, we send RIOP\x80\x00\x08\x00. Each time, a 512 byte response
+ * must be read, but we must loop until byte 5 in the response is 0x08,
+ * indicating success. */
+int rio_karma_init(struct us_data *us)
+{
+ int result, partial;
+ char *recv;
+ unsigned long timeout;
+
+ // us->iobuf is big enough to hold cmd but not receive
+ if (!(recv = kmalloc(RIO_RECV_LEN, GFP_KERNEL)))
+ goto die_nomem;
+
+ US_DEBUGP("Initializing Karma...\n");
+
+ memset(us->iobuf, 0, RIO_SEND_LEN);
+ memcpy(us->iobuf, RIOP_INIT, RIOP_INIT_LEN);
+
+ result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
+ us->iobuf, RIO_SEND_LEN, &partial);
+ if (result != USB_STOR_XFER_GOOD)
+ goto die;
+
+ result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
+ recv, RIO_RECV_LEN, &partial);
+ if (result != USB_STOR_XFER_GOOD)
+ goto die;
+
+ us->iobuf[4] = 0x80;
+ us->iobuf[5] = 0;
+ timeout = jiffies + msecs_to_jiffies(3000);
+ for (;;) {
+ US_DEBUGP("Sending init command\n");
+ result = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
+ us->iobuf, RIO_SEND_LEN, &partial);
+ if (result != USB_STOR_XFER_GOOD)
+ goto die;
+
+ result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
+ recv, RIO_RECV_LEN, &partial);
+ if (result != USB_STOR_XFER_GOOD)
+ goto die;
+
+ if (recv[5] == RIO_MSC)
+ break;
+ if (time_after(jiffies, timeout))
+ goto die;
+ msleep(10);
+ }
+ US_DEBUGP("Karma initialized.\n");
+ kfree(recv);
+ return 0;
+
+die:
+ kfree(recv);
+die_nomem:
+ US_DEBUGP("Could not initialize karma.\n");
+ return USB_STOR_TRANSPORT_FAILED;
+}
+