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path: root/drivers/scsi/mvme16x_scsi.c
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Diffstat (limited to 'drivers/scsi/mvme16x_scsi.c')
-rw-r--r--drivers/scsi/mvme16x_scsi.c160
1 files changed, 160 insertions, 0 deletions
diff --git a/drivers/scsi/mvme16x_scsi.c b/drivers/scsi/mvme16x_scsi.c
new file mode 100644
index 000000000..21d638299
--- /dev/null
+++ b/drivers/scsi/mvme16x_scsi.c
@@ -0,0 +1,160 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * 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 <linux/slab.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 int mvme16x_probe(struct platform_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 = kzalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL);
+ if (hostdata == NULL) {
+ printk(KERN_ERR "mvme16x-scsi: "
+ "Failed to allocate host data\n");
+ goto out;
+ }
+
+ /* 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->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);
+ }
+
+ platform_set_drvdata(dev, host);
+ scsi_scan_host(host);
+
+ return 0;
+
+ out_put_host:
+ scsi_host_put(host);
+ out_free:
+ kfree(hostdata);
+ out:
+ return -ENODEV;
+}
+
+static int mvme16x_device_remove(struct platform_device *dev)
+{
+ struct Scsi_Host *host = platform_get_drvdata(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 platform_driver mvme16x_scsi_driver = {
+ .driver = {
+ .name = "mvme16x-scsi",
+ },
+ .probe = mvme16x_probe,
+ .remove = mvme16x_device_remove,
+};
+
+static int __init mvme16x_scsi_init(void)
+{
+ int err;
+
+ err = platform_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)) {
+ platform_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);
+ platform_driver_unregister(&mvme16x_scsi_driver);
+}
+
+module_init(mvme16x_scsi_init);
+module_exit(mvme16x_scsi_exit);