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 25 MODULE_AUTHOR("Kars de Jong <jongk@linux-m68k.org>"); 26 MODULE_DESCRIPTION("MVME16x NCR53C710 driver"); 27 MODULE_LICENSE("GPL"); 28 29 static 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 36 static struct platform_device *mvme16x_scsi_device; 37 38 static 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 } 105 106 static 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 } 126 127 static struct platform_driver mvme16x_scsi_driver = { 128 .driver = { 129 .name = "mvme16x-scsi", 130 }, 131 .probe = mvme16x_probe, 132 .remove = mvme16x_device_remove, 133 }; 134 135 static 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 } 152 153 static void __exit mvme16x_scsi_exit(void) 154 { 155 platform_device_unregister(mvme16x_scsi_device); 156 platform_driver_unregister(&mvme16x_scsi_driver); 157 } 158 159 module_init(mvme16x_scsi_init); 160 module_exit(mvme16x_scsi_exit); 161