drivers/scsi/bvme6000_scsi.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * Detection routine for the NCR53c710 based BVME6000 SCSI Controllers for Linux.
0004  *
0005  * Based on work by Alan Hourihane and Kars de Jong
0006  *
0007  * Rewritten to use 53c700.c by Richard Hirst <richard@sleepie.demon.co.uk>
0008  */
0009
0010 #include <linux/module.h>
0011 #include <linux/blkdev.h>
0012 #include <linux/device.h>
0013 #include <linux/platform_device.h>
0014 #include <linux/init.h>
0015 #include <linux/interrupt.h>
0016 #include <linux/slab.h>
0017 #include <asm/bvme6000hw.h>
0018 #include <scsi/scsi_host.h>
0019 #include <scsi/scsi_device.h>
0020 #include <scsi/scsi_transport.h>
0021 #include <scsi/scsi_transport_spi.h>
0022
0023 #include "53c700.h"
0024
0025 MODULE_AUTHOR("Richard Hirst <richard@sleepie.demon.co.uk>");
0026 MODULE_DESCRIPTION("BVME6000 NCR53C710 driver");
0027 MODULE_LICENSE("GPL");
0028
0029 static struct scsi_host_template bvme6000_scsi_driver_template = {
0030     .name           = "BVME6000 NCR53c710 SCSI",
0031     .proc_name      = "BVME6000",
0032     .this_id        = 7,
0033     .module         = THIS_MODULE,
0034 };
0035
0036 static struct platform_device *bvme6000_scsi_device;
0037
0038 static int
0039 bvme6000_probe(struct platform_device *dev)
0040 {
0041     struct Scsi_Host *host;
0042     struct NCR_700_Host_Parameters *hostdata;
0043
0044     if (!MACH_IS_BVME6000)
0045         goto out;
0046
0047     hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL);
0048     if (!hostdata) {
0049         printk(KERN_ERR "bvme6000-scsi: "
0050                 "Failed to allocate host data\n");
0051         goto out;
0052     }
0053
0054     /* Fill in the required pieces of hostdata */
0055     hostdata->base = (void __iomem *)BVME_NCR53C710_BASE;
0056     hostdata->clock = 40;   /* XXX - depends on the CPU clock! */
0057     hostdata->chip710 = 1;
0058     hostdata->dmode_extra = DMODE_FC2;
0059     hostdata->dcntl_extra = EA_710;
0060     hostdata->ctest7_extra = CTEST7_TT1;
0061
0062     /* and register the chip */
0063     host = NCR_700_detect(&bvme6000_scsi_driver_template, hostdata,
0064                   &dev->dev);
0065     if (!host) {
0066         printk(KERN_ERR "bvme6000-scsi: No host detected; "
0067                 "board configuration problem?\n");
0068         goto out_free;
0069     }
0070     host->base = BVME_NCR53C710_BASE;
0071     host->this_id = 7;
0072     host->irq = BVME_IRQ_SCSI;
0073     if (request_irq(BVME_IRQ_SCSI, NCR_700_intr, 0, "bvme6000-scsi",
0074             host)) {
0075         printk(KERN_ERR "bvme6000-scsi: request_irq failed\n");
0076         goto out_put_host;
0077     }
0078
0079     platform_set_drvdata(dev, host);
0080     scsi_scan_host(host);
0081
0082     return 0;
0083
0084  out_put_host:
0085     scsi_host_put(host);
0086  out_free:
0087     kfree(hostdata);
0088  out:
0089     return -ENODEV;
0090 }
0091
0092 static int
0093 bvme6000_device_remove(struct platform_device *dev)
0094 {
0095     struct Scsi_Host *host = platform_get_drvdata(dev);
0096     struct NCR_700_Host_Parameters *hostdata = shost_priv(host);
0097
0098     scsi_remove_host(host);
0099     NCR_700_release(host);
0100     kfree(hostdata);
0101     free_irq(host->irq, host);
0102
0103     return 0;
0104 }
0105
0106 static struct platform_driver bvme6000_scsi_driver = {
0107     .driver = {
0108         .name       = "bvme6000-scsi",
0109     },
0110     .probe      = bvme6000_probe,
0111     .remove     = bvme6000_device_remove,
0112 };
0113
0114 static int __init bvme6000_scsi_init(void)
0115 {
0116     int err;
0117
0118     err = platform_driver_register(&bvme6000_scsi_driver);
0119     if (err)
0120         return err;
0121
0122     bvme6000_scsi_device = platform_device_register_simple("bvme6000-scsi",
0123                                    -1, NULL, 0);
0124     if (IS_ERR(bvme6000_scsi_device)) {
0125         platform_driver_unregister(&bvme6000_scsi_driver);
0126         return PTR_ERR(bvme6000_scsi_device);
0127     }
0128
0129     return 0;
0130 }
0131
0132 static void __exit bvme6000_scsi_exit(void)
0133 {
0134     platform_device_unregister(bvme6000_scsi_device);
0135     platform_driver_unregister(&bvme6000_scsi_driver);
0136 }
0137
0138 module_init(bvme6000_scsi_init);
0139 module_exit(bvme6000_scsi_exit);