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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mvme16x_scsi.c (3799B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * Detection routine for the NCR53c710 based MVME16x SCSI Controllers for Linux.
      4 *
      5 * Based on work by Alan Hourihane
      6 *
      7 * Rewritten to use 53c700.c by Kars de Jong <jongk@linux-m68k.org>
      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/mvme16xhw.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("Kars de Jong <jongk@linux-m68k.org>");
     26MODULE_DESCRIPTION("MVME16x NCR53C710 driver");
     27MODULE_LICENSE("GPL");
     28
     29static struct scsi_host_template mvme16x_scsi_driver_template = {
     30	.name			= "MVME16x NCR53c710 SCSI",
     31	.proc_name		= "MVME16x",
     32	.this_id		= 7,
     33	.module			= THIS_MODULE,
     34};
     35
     36static struct platform_device *mvme16x_scsi_device;
     37
     38static int mvme16x_probe(struct platform_device *dev)
     39{
     40	struct Scsi_Host * host = NULL;
     41	struct NCR_700_Host_Parameters *hostdata;
     42
     43	if (!MACH_IS_MVME16x)
     44		goto out;
     45
     46	if (mvme16x_config & MVME16x_CONFIG_NO_SCSICHIP) {
     47		printk(KERN_INFO "mvme16x-scsi: detection disabled, "
     48				 "SCSI chip not present\n");
     49		goto out;
     50	}
     51
     52	hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL);
     53	if (hostdata == NULL) {
     54		printk(KERN_ERR "mvme16x-scsi: "
     55				"Failed to allocate host data\n");
     56		goto out;
     57	}
     58
     59	/* Fill in the required pieces of hostdata */
     60	hostdata->base = (void __iomem *)0xfff47000UL;
     61	hostdata->clock = 50;	/* XXX - depends on the CPU clock! */
     62	hostdata->chip710 = 1;
     63	hostdata->dmode_extra = DMODE_FC2;
     64	hostdata->dcntl_extra = EA_710;
     65	hostdata->ctest7_extra = CTEST7_TT1;
     66
     67	/* and register the chip */
     68	host = NCR_700_detect(&mvme16x_scsi_driver_template, hostdata,
     69			      &dev->dev);
     70	if (!host) {
     71		printk(KERN_ERR "mvme16x-scsi: No host detected; "
     72				"board configuration problem?\n");
     73		goto out_free;
     74	}
     75	host->this_id = 7;
     76	host->base = 0xfff47000UL;
     77	host->irq = MVME16x_IRQ_SCSI;
     78	if (request_irq(host->irq, NCR_700_intr, 0, "mvme16x-scsi", host)) {
     79		printk(KERN_ERR "mvme16x-scsi: request_irq failed\n");
     80		goto out_put_host;
     81	}
     82
     83	/* Enable scsi chip ints */
     84	{
     85		volatile unsigned long v;
     86
     87		/* Enable scsi interrupts at level 4 in PCCchip2 */
     88		v = in_be32(0xfff4202c);
     89		v = (v & ~0xff) | 0x10 | 4;
     90		out_be32(0xfff4202c, v);
     91	}
     92
     93	platform_set_drvdata(dev, host);
     94	scsi_scan_host(host);
     95
     96	return 0;
     97
     98 out_put_host:
     99	scsi_host_put(host);
    100 out_free:
    101	kfree(hostdata);
    102 out:
    103	return -ENODEV;
    104}
    105
    106static int mvme16x_device_remove(struct platform_device *dev)
    107{
    108	struct Scsi_Host *host = platform_get_drvdata(dev);
    109	struct NCR_700_Host_Parameters *hostdata = shost_priv(host);
    110
    111	/* Disable scsi chip ints */
    112	{
    113		volatile unsigned long v;
    114
    115		v = in_be32(0xfff4202c);
    116		v &= ~0x10;
    117		out_be32(0xfff4202c, v);
    118	}
    119	scsi_remove_host(host);
    120	NCR_700_release(host);
    121	kfree(hostdata);
    122	free_irq(host->irq, host);
    123
    124	return 0;
    125}
    126
    127static struct platform_driver mvme16x_scsi_driver = {
    128	.driver = {
    129		.name           = "mvme16x-scsi",
    130	},
    131	.probe          = mvme16x_probe,
    132	.remove         = mvme16x_device_remove,
    133};
    134
    135static int __init mvme16x_scsi_init(void)
    136{
    137	int err;
    138
    139	err = platform_driver_register(&mvme16x_scsi_driver);
    140	if (err)
    141		return err;
    142
    143	mvme16x_scsi_device = platform_device_register_simple("mvme16x-scsi",
    144							      -1, NULL, 0);
    145	if (IS_ERR(mvme16x_scsi_device)) {
    146		platform_driver_unregister(&mvme16x_scsi_driver);
    147		return PTR_ERR(mvme16x_scsi_device);
    148	}
    149
    150	return 0;
    151}
    152
    153static void __exit mvme16x_scsi_exit(void)
    154{
    155	platform_device_unregister(mvme16x_scsi_device);
    156	platform_driver_unregister(&mvme16x_scsi_driver);
    157}
    158
    159module_init(mvme16x_scsi_init);
    160module_exit(mvme16x_scsi_exit);