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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sim710.c (5965B)


      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * sim710.c - Copyright (C) 1999 Richard Hirst <richard@sleepie.demon.co.uk>
      4 *
      5 *----------------------------------------------------------------------------
      6 *----------------------------------------------------------------------------
      7 *
      8 * MCA card detection code by Trent McNair. (now deleted)
      9 * Fixes to not explicitly nul bss data from Xavier Bestel.
     10 * Some multiboard fixes from Rolf Eike Beer.
     11 * Auto probing of EISA config space from Trevor Hemsley.
     12 *
     13 * Rewritten to use 53c700.c by James.Bottomley@SteelEye.com
     14 */
     15
     16#include <linux/module.h>
     17#include <linux/slab.h>
     18
     19#include <linux/blkdev.h>
     20#include <linux/device.h>
     21#include <linux/init.h>
     22#include <linux/eisa.h>
     23#include <linux/interrupt.h>
     24#include <scsi/scsi_host.h>
     25#include <scsi/scsi_device.h>
     26#include <scsi/scsi_transport.h>
     27#include <scsi/scsi_transport_spi.h>
     28
     29#include "53c700.h"
     30
     31
     32/* Must be enough for EISA */
     33#define MAX_SLOTS 8
     34static __u8 __initdata id_array[MAX_SLOTS] = { [0 ... MAX_SLOTS-1] = 7 };
     35
     36static char *sim710;		/* command line passed by insmod */
     37
     38MODULE_AUTHOR("Richard Hirst");
     39MODULE_DESCRIPTION("Simple NCR53C710 driver");
     40MODULE_LICENSE("GPL");
     41
     42module_param(sim710, charp, 0);
     43
     44#ifdef MODULE
     45#define ARG_SEP ' '
     46#else
     47#define ARG_SEP ','
     48#endif
     49
     50static __init int
     51param_setup(char *str)
     52{
     53	char *pos = str, *next;
     54	int slot = -1;
     55
     56	while(pos != NULL && (next = strchr(pos, ':')) != NULL) {
     57		int val = (int)simple_strtoul(++next, NULL, 0);
     58
     59		if(!strncmp(pos, "slot:", 5))
     60			slot = val;
     61		else if(!strncmp(pos, "id:", 3)) {
     62			if(slot == -1) {
     63				printk(KERN_WARNING "sim710: Must specify slot for id parameter\n");
     64			} else if(slot >= MAX_SLOTS) {
     65				printk(KERN_WARNING "sim710: Illegal slot %d for id %d\n", slot, val);
     66			} else {
     67				id_array[slot] = val;
     68			}
     69		}
     70		if((pos = strchr(pos, ARG_SEP)) != NULL)
     71			pos++;
     72	}
     73	return 1;
     74}
     75__setup("sim710=", param_setup);
     76
     77static struct scsi_host_template sim710_driver_template = {
     78	.name			= "LSI (Symbios) 710 EISA",
     79	.proc_name		= "sim710",
     80	.this_id		= 7,
     81	.module			= THIS_MODULE,
     82};
     83
     84static int sim710_probe_common(struct device *dev, unsigned long base_addr,
     85			       int irq, int clock, int differential,
     86			       int scsi_id)
     87{
     88	struct Scsi_Host * host = NULL;
     89	struct NCR_700_Host_Parameters *hostdata =
     90		kzalloc(sizeof(struct NCR_700_Host_Parameters),	GFP_KERNEL);
     91
     92	printk(KERN_NOTICE "sim710: %s\n", dev_name(dev));
     93	printk(KERN_NOTICE "sim710: irq = %d, clock = %d, base = 0x%lx, scsi_id = %d\n",
     94	       irq, clock, base_addr, scsi_id);
     95
     96	if(hostdata == NULL) {
     97		printk(KERN_ERR "sim710: Failed to allocate host data\n");
     98		goto out;
     99	}
    100
    101	if(request_region(base_addr, 64, "sim710") == NULL) {
    102		printk(KERN_ERR "sim710: Failed to reserve IO region 0x%lx\n",
    103		       base_addr);
    104		goto out_free;
    105	}
    106
    107	/* Fill in the three required pieces of hostdata */
    108	hostdata->base = ioport_map(base_addr, 64);
    109	hostdata->differential = differential;
    110	hostdata->clock = clock;
    111	hostdata->chip710 = 1;
    112	hostdata->burst_length = 8;
    113
    114	/* and register the chip */
    115	if((host = NCR_700_detect(&sim710_driver_template, hostdata, dev))
    116	   == NULL) {
    117		printk(KERN_ERR "sim710: No host detected; card configuration problem?\n");
    118		goto out_release;
    119	}
    120	host->this_id = scsi_id;
    121	host->base = base_addr;
    122	host->irq = irq;
    123	if (request_irq(irq, NCR_700_intr, IRQF_SHARED, "sim710", host)) {
    124		printk(KERN_ERR "sim710: request_irq failed\n");
    125		goto out_put_host;
    126	}
    127
    128	dev_set_drvdata(dev, host);
    129	scsi_scan_host(host);
    130
    131	return 0;
    132
    133 out_put_host:
    134	scsi_host_put(host);
    135 out_release:
    136	release_region(base_addr, 64);
    137 out_free:
    138	kfree(hostdata);
    139 out:
    140	return -ENODEV;
    141}
    142
    143static int sim710_device_remove(struct device *dev)
    144{
    145	struct Scsi_Host *host = dev_get_drvdata(dev);
    146	struct NCR_700_Host_Parameters *hostdata =
    147		(struct NCR_700_Host_Parameters *)host->hostdata[0];
    148
    149	scsi_remove_host(host);
    150	NCR_700_release(host);
    151	kfree(hostdata);
    152	free_irq(host->irq, host);
    153	release_region(host->base, 64);
    154	return 0;
    155}
    156
    157#ifdef CONFIG_EISA
    158static struct eisa_device_id sim710_eisa_ids[] = {
    159	{ "CPQ4410" },
    160	{ "CPQ4411" },
    161	{ "HWP0C80" },
    162	{ "" }
    163};
    164MODULE_DEVICE_TABLE(eisa, sim710_eisa_ids);
    165
    166static int sim710_eisa_probe(struct device *dev)
    167{
    168	struct eisa_device *edev = to_eisa_device(dev);
    169	unsigned long io_addr = edev->base_addr;
    170	char eisa_cpq_irqs[] = { 11, 14, 15, 10, 9, 0 };
    171	char eisa_hwp_irqs[] = { 3, 4, 5, 7, 12, 10, 11, 0};
    172	char *eisa_irqs;
    173	unsigned char irq_index;
    174	unsigned char irq, differential = 0, scsi_id = 7;
    175
    176	if(strcmp(edev->id.sig, "HWP0C80") == 0) {
    177		__u8 val;
    178		eisa_irqs =  eisa_hwp_irqs;
    179		irq_index = (inb(io_addr + 0xc85) & 0x7) - 1;
    180
    181		val = inb(io_addr + 0x4);
    182		scsi_id = ffs(val) - 1;
    183
    184		if(scsi_id > 7 || (val & ~(1<<scsi_id)) != 0) {
    185			printk(KERN_ERR "sim710.c, EISA card %s has incorrect scsi_id, setting to 7\n", dev_name(dev));
    186			scsi_id = 7;
    187		}
    188	} else {
    189		eisa_irqs = eisa_cpq_irqs;
    190		irq_index = inb(io_addr + 0xc88) & 0x07;
    191	}
    192
    193	if(irq_index >= strlen(eisa_irqs)) {
    194		printk("sim710.c: irq nasty\n");
    195		return -ENODEV;
    196	}
    197
    198	irq = eisa_irqs[irq_index];
    199		
    200	return sim710_probe_common(dev, io_addr, irq, 50,
    201				   differential, scsi_id);
    202}
    203
    204static struct eisa_driver sim710_eisa_driver = {
    205	.id_table		= sim710_eisa_ids,
    206	.driver = {
    207		.name		= "sim710",
    208		.probe		= sim710_eisa_probe,
    209		.remove		= sim710_device_remove,
    210	},
    211};
    212#endif /* CONFIG_EISA */
    213
    214static int __init sim710_init(void)
    215{
    216#ifdef MODULE
    217	if (sim710)
    218		param_setup(sim710);
    219#endif
    220
    221#ifdef CONFIG_EISA
    222	/*
    223	 * FIXME: We'd really like to return -ENODEV if no devices have actually
    224	 * been found.  However eisa_driver_register() only reports problems
    225	 * with kobject_register() so simply return success for now.
    226	 */
    227	eisa_driver_register(&sim710_eisa_driver);
    228#endif
    229	return 0;
    230}
    231
    232static void __exit sim710_exit(void)
    233{
    234#ifdef CONFIG_EISA
    235	eisa_driver_unregister(&sim710_eisa_driver);
    236#endif
    237}
    238
    239module_init(sim710_init);
    240module_exit(sim710_exit);