usb-storage: make sddr09 a separate module

This patch (as1207) converts usb-storage's sddr09 subdriver into a
separate module.

An unexpected complication arises because of DPCM devices, in which
one LUN uses the sddr09 transport and one uses the standard CB
transport.  Since these devices can be used even when
USB_STORAGE_SDDR09 isn't configured, their entries in unusual_devs.h
require special treatment.  If SDDR09 isn't configured then the
entries remain in unusual_devs.h; if it is then the entries are
present in unusual_sddr09.h instead.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 102 insertions, 5 deletions

diff --git a/drivers/usb/storage/sddr09.c b/drivers/usb/storage/sddr09.c
index b667c7d2b837..170ad86b2d3e 100644
--- a/drivers/usb/storage/sddr09.c
+++ b/drivers/usb/storage/sddr09.c
@@ -41,6 +41,7 @@
  */
 
 #include <linux/errno.h>
+#include <linux/module.h>
 #include <linux/slab.h>
 
 #include <scsi/scsi.h>
@@ -51,7 +52,50 @@
 #include "transport.h"
 #include "protocol.h"
 #include "debug.h"
-#include "sddr09.h"
+
+
+static int usb_stor_sddr09_dpcm_init(struct us_data *us);
+static int sddr09_transport(struct scsi_cmnd *srb, struct us_data *us);
+static int usb_stor_sddr09_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)|(USB_US_TYPE_STOR<<24) }
+
+struct usb_device_id sddr09_usb_ids[] = {
+#       include "unusual_sddr09.h"
+        { }             /* Terminating entry */
+};
+MODULE_DEVICE_TABLE(usb, sddr09_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 sddr09_unusual_dev_list[] = {
+#       include "unusual_sddr09.h"
+        { }             /* Terminating entry */
+};
+
+#undef UNUSUAL_DEV
 
 
 #define short_pack(lsb,msb) ( ((u16)(lsb)) | ( ((u16)(msb))<<8 ) )
@@ -1406,7 +1450,7 @@ sddr09_common_init(struct us_data *us) {
  * unusual devices list but called from here then LUN 0 of the combo reader
  * is not recognized. But I do not know what precisely these calls do.
  */
-int
+static int
 usb_stor_sddr09_dpcm_init(struct us_data *us) {
         int result;
         unsigned char *data = us->iobuf;
@@ -1456,7 +1500,7 @@ usb_stor_sddr09_dpcm_init(struct us_data *us) {
 /*
  * Transport for the Microtech DPCM-USB
  */
-int dpcm_transport(struct scsi_cmnd *srb, struct us_data *us)
+static int dpcm_transport(struct scsi_cmnd *srb, struct us_data *us)
 {
         int ret;
 
@@ -1498,7 +1542,7 @@ int dpcm_transport(struct scsi_cmnd *srb, struct us_data *us)
 /*
  * Transport for the Sandisk SDDR-09
  */
-int sddr09_transport(struct scsi_cmnd *srb, struct us_data *us)
+static int sddr09_transport(struct scsi_cmnd *srb, struct us_data *us)
 {
         static unsigned char sensekey = 0, sensecode = 0;
         static unsigned char havefakesense = 0;
@@ -1697,7 +1741,60 @@ int sddr09_transport(struct scsi_cmnd *srb, struct us_data *us)
 /*
  * Initialization routine for the sddr09 subdriver
  */
-int
+static int
 usb_stor_sddr09_init(struct us_data *us) {
         return sddr09_common_init(us);
 }
+
+static int sddr09_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 - sddr09_usb_ids) + sddr09_unusual_dev_list);
+        if (result)
+                return result;
+
+        if (us->protocol == US_PR_DPCM_USB) {
+                us->transport_name = "Control/Bulk-EUSB/SDDR09";
+                us->transport = dpcm_transport;
+                us->transport_reset = usb_stor_CB_reset;
+                us->max_lun = 1;
+        } else {
+                us->transport_name = "EUSB/SDDR09";
+                us->transport = sddr09_transport;
+                us->transport_reset = usb_stor_CB_reset;
+                us->max_lun = 0;
+        }
+
+        result = usb_stor_probe2(us);
+        return result;
+}
+
+static struct usb_driver sddr09_driver = {
+        .name =         "ums-sddr09",
+        .probe =        sddr09_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 =     sddr09_usb_ids,
+        .soft_unbind =  1,
+};
+
+static int __init sddr09_init(void)
+{
+        return usb_register(&sddr09_driver);
+}
+
+static void __exit sddr09_exit(void)
+{
+        usb_deregister(&sddr09_driver);
+}
+
+module_init(sddr09_init);
+module_exit(sddr09_exit);