cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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bvme6000_scsi.c (3350B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * Detection routine for the NCR53c710 based BVME6000 SCSI Controllers for Linux.
      4 *
      5 * Based on work by Alan Hourihane and Kars de Jong
      6 *
      7 * Rewritten to use 53c700.c by Richard Hirst <richard@sleepie.demon.co.uk>
      8 */
      9
     10#include <linux/module.h>
     11#include <linux/blkdev.h>
     12#include <linux/device.h>
     13#include <linux/platform_device.h>
     14#include <linux/init.h>
     15#include <linux/interrupt.h>
     16#include <linux/slab.h>
     17#include <asm/bvme6000hw.h>
     18#include <scsi/scsi_host.h>
     19#include <scsi/scsi_device.h>
     20#include <scsi/scsi_transport.h>
     21#include <scsi/scsi_transport_spi.h>
     22
     23#include "53c700.h"
     24
     25MODULE_AUTHOR("Richard Hirst <richard@sleepie.demon.co.uk>");
     26MODULE_DESCRIPTION("BVME6000 NCR53C710 driver");
     27MODULE_LICENSE("GPL");
     28
     29static struct scsi_host_template bvme6000_scsi_driver_template = {
     30	.name			= "BVME6000 NCR53c710 SCSI",
     31	.proc_name		= "BVME6000",
     32	.this_id		= 7,
     33	.module			= THIS_MODULE,
     34};
     35
     36static struct platform_device *bvme6000_scsi_device;
     37
     38static int
     39bvme6000_probe(struct platform_device *dev)
     40{
     41	struct Scsi_Host *host;
     42	struct NCR_700_Host_Parameters *hostdata;
     43
     44	if (!MACH_IS_BVME6000)
     45		goto out;
     46
     47	hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL);
     48	if (!hostdata) {
     49		printk(KERN_ERR "bvme6000-scsi: "
     50				"Failed to allocate host data\n");
     51		goto out;
     52	}
     53
     54	/* Fill in the required pieces of hostdata */
     55	hostdata->base = (void __iomem *)BVME_NCR53C710_BASE;
     56	hostdata->clock = 40;	/* XXX - depends on the CPU clock! */
     57	hostdata->chip710 = 1;
     58	hostdata->dmode_extra = DMODE_FC2;
     59	hostdata->dcntl_extra = EA_710;
     60	hostdata->ctest7_extra = CTEST7_TT1;
     61
     62	/* and register the chip */
     63	host = NCR_700_detect(&bvme6000_scsi_driver_template, hostdata,
     64			      &dev->dev);
     65	if (!host) {
     66		printk(KERN_ERR "bvme6000-scsi: No host detected; "
     67				"board configuration problem?\n");
     68		goto out_free;
     69	}
     70	host->base = BVME_NCR53C710_BASE;
     71	host->this_id = 7;
     72	host->irq = BVME_IRQ_SCSI;
     73	if (request_irq(BVME_IRQ_SCSI, NCR_700_intr, 0, "bvme6000-scsi",
     74			host)) {
     75		printk(KERN_ERR "bvme6000-scsi: request_irq failed\n");
     76		goto out_put_host;
     77	}
     78
     79	platform_set_drvdata(dev, host);
     80	scsi_scan_host(host);
     81
     82	return 0;
     83
     84 out_put_host:
     85	scsi_host_put(host);
     86 out_free:
     87	kfree(hostdata);
     88 out:
     89	return -ENODEV;
     90}
     91
     92static int
     93bvme6000_device_remove(struct platform_device *dev)
     94{
     95	struct Scsi_Host *host = platform_get_drvdata(dev);
     96	struct NCR_700_Host_Parameters *hostdata = shost_priv(host);
     97
     98	scsi_remove_host(host);
     99	NCR_700_release(host);
    100	kfree(hostdata);
    101	free_irq(host->irq, host);
    102
    103	return 0;
    104}
    105
    106static struct platform_driver bvme6000_scsi_driver = {
    107	.driver = {
    108		.name		= "bvme6000-scsi",
    109	},
    110	.probe		= bvme6000_probe,
    111	.remove		= bvme6000_device_remove,
    112};
    113
    114static int __init bvme6000_scsi_init(void)
    115{
    116	int err;
    117
    118	err = platform_driver_register(&bvme6000_scsi_driver);
    119	if (err)
    120		return err;
    121
    122	bvme6000_scsi_device = platform_device_register_simple("bvme6000-scsi",
    123							       -1, NULL, 0);
    124	if (IS_ERR(bvme6000_scsi_device)) {
    125		platform_driver_unregister(&bvme6000_scsi_driver);
    126		return PTR_ERR(bvme6000_scsi_device);
    127	}
    128
    129	return 0;
    130}
    131
    132static void __exit bvme6000_scsi_exit(void)
    133{
    134	platform_device_unregister(bvme6000_scsi_device);
    135	platform_driver_unregister(&bvme6000_scsi_driver);
    136}
    137
    138module_init(bvme6000_scsi_init);
    139module_exit(bvme6000_scsi_exit);