[SCSI] 53c700: Amiga 4000T NCR53c710 SCSI

New driver for the Amiga 4000T built-in 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, 155 insertions, 2 deletions

diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index 915bf6caffe0..8e53586a3f12 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -1008,7 +1008,7 @@ config SCSI_STEX
 
 config 53C700_BE_BUS
         bool
-        depends on MVME16x_SCSI || BVME6000_SCSI
+        depends on SCSI_A4000T || MVME16x_SCSI || BVME6000_SCSI
         default y
 
 config SCSI_SYM53C8XX_2
@@ -1614,13 +1614,23 @@ config FASTLANE_SCSI
           If you have the Phase5 Fastlane Z3 SCSI controller, or plan to use
           one in the near future, say Y to this question. Otherwise, say N.
 
+config SCSI_A4000T
+        tristate "A4000T NCR53c710 SCSI support (EXPERIMENTAL)"
+        depends on AMIGA && SCSI && EXPERIMENTAL
+        select SCSI_SPI_ATTRS
+        help
+          If you have an Amiga 4000T and have SCSI devices connected to the
+          built-in SCSI controller, say Y. Otherwise, say N.
+
+          To compile this driver as a module, choose M here: the
+          module will be called a4000t.
+
 config SCSI_AMIGA7XX
         bool "Amiga NCR53c710 SCSI support (EXPERIMENTAL)"
         depends on AMIGA && SCSI && EXPERIMENTAL && BROKEN
         help
           Support for various NCR53c710-based SCSI controllers on the Amiga.
           This includes:
-            - the builtin SCSI controller on the Amiga 4000T,
             - the Amiga 4091 Zorro III SCSI-2 controller,
             - the MacroSystem Development's WarpEngine Amiga SCSI-2 controller
               (info at
diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile
index 4bc4ef8d4209..1fd7fbc56ba3 100644
--- a/drivers/scsi/Makefile
+++ b/drivers/scsi/Makefile
@@ -37,6 +37,7 @@ obj-$(CONFIG_SCSI_SAS_LIBSAS)	+= libsas/
 
 obj-$(CONFIG_ISCSI_TCP)         += libiscsi.o   iscsi_tcp.o
 obj-$(CONFIG_INFINIBAND_ISER)   += libiscsi.o
+obj-$(CONFIG_SCSI_A4000T)       += 53c700.o     a4000t.o
 obj-$(CONFIG_A3000_SCSI)        += a3000.o      wd33c93.o
 obj-$(CONFIG_A2091_SCSI)        += a2091.o      wd33c93.o
 obj-$(CONFIG_GVP11_SCSI)        += gvp11.o      wd33c93.o
diff --git a/drivers/scsi/a4000t.c b/drivers/scsi/a4000t.c
new file mode 100644
index 000000000000..e1c6eda64c51
--- /dev/null
+++ b/drivers/scsi/a4000t.c
@@ -0,0 +1,142 @@
+/*
+ * Detection routine for the NCR53c710 based Amiga SCSI Controllers for Linux.
+ *              Amiga Technologies A4000T SCSI controller.
+ *
+ * Written 1997 by Alan Hourihane <alanh@fairlite.demon.co.uk>
+ * plus modifications of the 53c7xx.c driver to support the Amiga.
+ *
+ * Rewritten to use 53c700.c by Kars de Jong <jongk@linux-m68k.org>
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <asm/amigaints.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_transport_spi.h>
+
+#include "53c700.h"
+
+MODULE_AUTHOR("Alan Hourihane <alanh@fairlite.demon.co.uk> / Kars de Jong <jongk@linux-m68k.org>");
+MODULE_DESCRIPTION("Amiga A4000T NCR53C710 driver");
+MODULE_LICENSE("GPL");
+
+
+static struct scsi_host_template a4000t_scsi_driver_template = {
+        .name           = "A4000T builtin SCSI",
+        .proc_name      = "A4000t",
+        .this_id        = 7,
+        .module         = THIS_MODULE,
+};
+
+static struct platform_device *a4000t_scsi_device;
+
+#define A4000T_SCSI_ADDR 0xdd0040
+
+static int __devinit a4000t_probe(struct device *dev)
+{
+        struct Scsi_Host * host = NULL;
+        struct NCR_700_Host_Parameters *hostdata;
+
+        if (!(MACH_IS_AMIGA && AMIGAHW_PRESENT(A4000_SCSI)))
+                goto out;
+
+        if (!request_mem_region(A4000T_SCSI_ADDR, 0x1000,
+                                "A4000T builtin SCSI"))
+                goto out;
+
+        hostdata = kmalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL);
+        if (hostdata == NULL) {
+                printk(KERN_ERR "a4000t-scsi: Failed to allocate host data\n");
+                goto out_release;
+        }
+        memset(hostdata, 0, sizeof(struct NCR_700_Host_Parameters));
+
+        /* Fill in the required pieces of hostdata */
+        hostdata->base = (void __iomem *)ZTWO_VADDR(A4000T_SCSI_ADDR);
+        hostdata->clock = 50;
+        hostdata->chip710 = 1;
+        hostdata->dmode_extra = DMODE_FC2;
+        hostdata->dcntl_extra = EA_710;
+
+        /* and register the chip */
+        host = NCR_700_detect(&a4000t_scsi_driver_template, hostdata, dev);
+        if (!host) {
+                printk(KERN_ERR "a4000t-scsi: No host detected; "
+                                "board configuration problem?\n");
+                goto out_free;
+        }
+
+        host->this_id = 7;
+        host->base = A4000T_SCSI_ADDR;
+        host->irq = IRQ_AMIGA_PORTS;
+
+        if (request_irq(host->irq, NCR_700_intr, IRQF_SHARED, "a4000t-scsi",
+                        host)) {
+                printk(KERN_ERR "a4000t-scsi: request_irq failed\n");
+                goto out_put_host;
+        }
+
+        scsi_scan_host(host);
+
+        return 0;
+
+ out_put_host:
+        scsi_host_put(host);
+ out_free:
+        kfree(hostdata);
+ out_release:
+        release_mem_region(A4000T_SCSI_ADDR, 0x1000);
+ out:
+        return -ENODEV;
+}
+
+static __devexit int a4000t_device_remove(struct device *dev)
+{
+        struct Scsi_Host *host = dev_to_shost(dev);
+        struct NCR_700_Host_Parameters *hostdata = shost_priv(host);
+
+        scsi_remove_host(host);
+
+        NCR_700_release(host);
+        kfree(hostdata);
+        free_irq(host->irq, host);
+        release_mem_region(A4000T_SCSI_ADDR, 0x1000);
+
+        return 0;
+}
+
+static struct device_driver a4000t_scsi_driver = {
+        .name   = "a4000t-scsi",
+        .bus    = &platform_bus_type,
+        .probe  = a4000t_probe,
+        .remove = __devexit_p(a4000t_device_remove),
+};
+
+static int __init a4000t_scsi_init(void)
+{
+        int err;
+
+        err = driver_register(&a4000t_scsi_driver);
+        if (err)
+                return err;
+
+        a4000t_scsi_device = platform_device_register_simple("a4000t-scsi",
+                        -1, NULL, 0);
+        if (IS_ERR(a4000t_scsi_device)) {
+                driver_unregister(&a4000t_scsi_driver);
+                return PTR_ERR(a4000t_scsi_device);
+        }
+
+        return err;
+}
+
+static void __exit a4000t_scsi_exit(void)
+{
+        platform_device_unregister(a4000t_scsi_device);
+        driver_unregister(&a4000t_scsi_driver);
+}
+
+module_init(a4000t_scsi_init);
+module_exit(a4000t_scsi_exit);