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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Detection routine for the NCR53c710 based MVME16x SCSI Controllers for Linux.4 *5 * Based on work by Alan Hourihane6 *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 void 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 125static struct platform_driver mvme16x_scsi_driver = {126 .driver = {127 .name = "mvme16x-scsi",128 },129 .probe = mvme16x_probe,130 .remove_new = mvme16x_device_remove,131};132 133static int __init mvme16x_scsi_init(void)134{135 int err;136 137 err = platform_driver_register(&mvme16x_scsi_driver);138 if (err)139 return err;140 141 mvme16x_scsi_device = platform_device_register_simple("mvme16x-scsi",142 -1, NULL, 0);143 if (IS_ERR(mvme16x_scsi_device)) {144 platform_driver_unregister(&mvme16x_scsi_driver);145 return PTR_ERR(mvme16x_scsi_device);146 }147 148 return 0;149}150 151static void __exit mvme16x_scsi_exit(void)152{153 platform_device_unregister(mvme16x_scsi_device);154 platform_driver_unregister(&mvme16x_scsi_driver);155}156 157module_init(mvme16x_scsi_init);158module_exit(mvme16x_scsi_exit);159