[POWERPC] Create add_rtc() function to enable the RTC CMOS driver

[linux-2.6-omap-h63xx.git] / drivers / s390 / block / dasd.c

diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index e71929db8b0642b5fcd1fa347dfff3898f64df21..bfeca57098fa6725edd53546e1466f78e6aceed9 100644 (file)
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -2174,6 +2174,53 @@ dasd_generic_notify(struct ccw_device *cdev, int event)
        return ret;
 }
 
+static struct dasd_ccw_req *dasd_generic_build_rdc(struct dasd_device *device,
+                                                  void *rdc_buffer,
+                                                  int rdc_buffer_size,
+                                                  char *magic)
+{
+       struct dasd_ccw_req *cqr;
+       struct ccw1 *ccw;
+
+       cqr = dasd_smalloc_request(magic, 1 /* RDC */, rdc_buffer_size, device);
+
+       if (IS_ERR(cqr)) {
+               DEV_MESSAGE(KERN_WARNING, device, "%s",
+                           "Could not allocate RDC request");
+               return cqr;
+       }
+
+       ccw = cqr->cpaddr;
+       ccw->cmd_code = CCW_CMD_RDC;
+       ccw->cda = (__u32)(addr_t)rdc_buffer;
+       ccw->count = rdc_buffer_size;
+
+       cqr->device = device;
+       cqr->expires = 10*HZ;
+       clear_bit(DASD_CQR_FLAGS_USE_ERP, &cqr->flags);
+       cqr->retries = 2;
+       cqr->buildclk = get_clock();
+       cqr->status = DASD_CQR_FILLED;
+       return cqr;
+}
+
+
+int dasd_generic_read_dev_chars(struct dasd_device *device, char *magic,
+                               void **rdc_buffer, int rdc_buffer_size)
+{
+       int ret;
+       struct dasd_ccw_req *cqr;
+
+       cqr = dasd_generic_build_rdc(device, *rdc_buffer, rdc_buffer_size,
+                                    magic);
+       if (IS_ERR(cqr))
+               return PTR_ERR(cqr);
+
+       ret = dasd_sleep_on(cqr);
+       dasd_sfree_request(cqr, cqr->device);
+       return ret;
+}
+EXPORT_SYMBOL_GPL(dasd_generic_read_dev_chars);
 
 static int __init
 dasd_init(void)