[SCSI] 53c700: m68k MVME16x NCR53C710 SCSI

New driver for the MVME16x NCR53C710 SCSI controller, using the 53c700 SCSI
core.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

3 files changed, 162 insertions, 3 deletions

diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index 17a9efe0f617..915bf6caffe0 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -1008,7 +1008,7 @@ config SCSI_STEX
 
 config 53C700_BE_BUS
         bool
-        depends on BVME6000_SCSI
+        depends on MVME16x_SCSI || BVME6000_SCSI
         default y
 
 config SCSI_SYM53C8XX_2
@@ -1715,8 +1715,8 @@ config MVME147_SCSI
           single-board computer.
 
 config MVME16x_SCSI
-        bool "NCR53C710 SCSI driver for MVME16x"
-        depends on MVME16x && SCSI && BROKEN
+        tristate "NCR53C710 SCSI driver for MVME16x"
+        depends on MVME16x && SCSI
         select SCSI_SPI_ATTRS
         help
           The Motorola MVME162, 166, 167, 172 and 177 boards use the NCR53C710
diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile
index 77dd63d71c5f..4bc4ef8d4209 100644
--- a/drivers/scsi/Makefile
+++ b/drivers/scsi/Makefile
@@ -52,6 +52,7 @@ obj-$(CONFIG_ATARI_SCSI)	+= atari_scsi.o
 obj-$(CONFIG_MAC_SCSI)          += mac_scsi.o
 obj-$(CONFIG_SCSI_MAC_ESP)      += mac_esp.o    NCR53C9x.o
 obj-$(CONFIG_SUN3_SCSI)         += sun3_scsi.o  sun3_scsi_vme.o
+obj-$(CONFIG_MVME16x_SCSI)      += 53c700.o     mvme16x_scsi.o
 obj-$(CONFIG_BVME6000_SCSI)     += 53c700.o     bvme6000_scsi.o
 obj-$(CONFIG_SCSI_SIM710)       += 53c700.o     sim710.o
 obj-$(CONFIG_SCSI_ADVANSYS)     += advansys.o
diff --git a/drivers/scsi/mvme16x_scsi.c b/drivers/scsi/mvme16x_scsi.c
new file mode 100644
index 000000000000..d6ef22a941c4
--- /dev/null
+++ b/drivers/scsi/mvme16x_scsi.c
@@ -0,0 +1,158 @@
+/*
+ * Detection routine for the NCR53c710 based MVME16x SCSI Controllers for Linux.
+ *
+ * Based on work by Alan Hourihane
+ *
+ * Rewritten to use 53c700.c by Kars de Jong <jongk@linux-m68k.org>
+ */
+
+#include <linux/module.h>
+#include <linux/blkdev.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <asm/mvme16xhw.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_transport.h>
+#include <scsi/scsi_transport_spi.h>
+
+#include "53c700.h"
+
+MODULE_AUTHOR("Kars de Jong <jongk@linux-m68k.org>");
+MODULE_DESCRIPTION("MVME16x NCR53C710 driver");
+MODULE_LICENSE("GPL");
+
+static struct scsi_host_template mvme16x_scsi_driver_template = {
+        .name                   = "MVME16x NCR53c710 SCSI",
+        .proc_name              = "MVME16x",
+        .this_id                = 7,
+        .module                 = THIS_MODULE,
+};
+
+static struct platform_device *mvme16x_scsi_device;
+
+static __devinit int
+mvme16x_probe(struct device *dev)
+{
+        struct Scsi_Host * host = NULL;
+        struct NCR_700_Host_Parameters *hostdata;
+
+        if (!MACH_IS_MVME16x)
+                goto out;
+
+        if (mvme16x_config & MVME16x_CONFIG_NO_SCSICHIP) {
+                printk(KERN_INFO "mvme16x-scsi: detection disabled, "
+                                 "SCSI chip not present\n");
+                goto out;
+        }
+
+        hostdata = kmalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL);
+        if (hostdata == NULL) {
+                printk(KERN_ERR "mvme16x-scsi: "
+                                "Failed to allocate host data\n");
+                goto out;
+        }
+        memset(hostdata, 0, sizeof(struct NCR_700_Host_Parameters));
+
+        /* Fill in the required pieces of hostdata */
+        hostdata->base = (void __iomem *)0xfff47000UL;
+        hostdata->clock = 50;   /* XXX - depends on the CPU clock! */
+        hostdata->chip710 = 1;
+        hostdata->dmode_extra = DMODE_FC2;
+        hostdata->dcntl_extra = EA_710;
+        hostdata->ctest7_extra = CTEST7_TT1;
+
+        /* and register the chip */
+        host = NCR_700_detect(&mvme16x_scsi_driver_template, hostdata, dev);
+        if (!host) {
+                printk(KERN_ERR "mvme16x-scsi: No host detected; "
+                                "board configuration problem?\n");
+                goto out_free;
+        }
+        host->this_id = 7;
+        host->base = 0xfff47000UL;
+        host->irq = MVME16x_IRQ_SCSI;
+        if (request_irq(host->irq, NCR_700_intr, 0, "mvme16x-scsi", host)) {
+                printk(KERN_ERR "mvme16x-scsi: request_irq failed\n");
+                goto out_put_host;
+        }
+
+        /* Enable scsi chip ints */
+        {
+                volatile unsigned long v;
+
+                /* Enable scsi interrupts at level 4 in PCCchip2 */
+                v = in_be32(0xfff4202c);
+                v = (v & ~0xff) | 0x10 | 4;
+                out_be32(0xfff4202c, v);
+        }
+
+        scsi_scan_host(host);
+
+        return 0;
+
+ out_put_host:
+        scsi_host_put(host);
+ out_free:
+        kfree(hostdata);
+ out:
+        return -ENODEV;
+}
+
+static __devexit int
+mvme16x_device_remove(struct device *dev)
+{
+        struct Scsi_Host *host = dev_to_shost(dev);
+        struct NCR_700_Host_Parameters *hostdata = shost_priv(host);
+
+        /* Disable scsi chip ints */
+        {
+                volatile unsigned long v;
+
+                v = in_be32(0xfff4202c);
+                v &= ~0x10;
+                out_be32(0xfff4202c, v);
+        }
+        scsi_remove_host(host);
+        NCR_700_release(host);
+        kfree(hostdata);
+        free_irq(host->irq, host);
+
+        return 0;
+}
+
+static struct device_driver mvme16x_scsi_driver = {
+        .name   = "mvme16x-scsi",
+        .bus    = &platform_bus_type,
+        .probe  = mvme16x_probe,
+        .remove = __devexit_p(mvme16x_device_remove),
+};
+
+static int __init mvme16x_scsi_init(void)
+{
+        int err;
+
+        err = driver_register(&mvme16x_scsi_driver);
+        if (err)
+                return err;
+
+        mvme16x_scsi_device = platform_device_register_simple("mvme16x-scsi",
+                                                              -1, NULL, 0);
+        if (IS_ERR(mvme16x_scsi_device)) {
+                driver_unregister(&mvme16x_scsi_driver);
+                return PTR_ERR(mvme16x_scsi_device);
+        }
+
+        return 0;
+}
+
+static void __exit mvme16x_scsi_exit(void)
+{
+        platform_device_unregister(mvme16x_scsi_device);
+        driver_unregister(&mvme16x_scsi_driver);
+}
+
+module_init(mvme16x_scsi_init);
+module_exit(mvme16x_scsi_exit);