1 /* 2 * Detection routine for the NCR53c710 based MVME16x SCSI Controllers for Linux. 3 * 4 * Based on work by Alan Hourihane 5 * 6 * Rewritten to use 53c700.c by Kars de Jong <jongk@linux-m68k.org> 7 */ 8 9 #include <linux/module.h> 10 #include <linux/blkdev.h> 11 #include <linux/device.h> 12 #include <linux/platform_device.h> 13 #include <linux/init.h> 14 #include <linux/interrupt.h> 15 #include <linux/slab.h> 16 #include <asm/mvme16xhw.h> 17 #include <scsi/scsi_host.h> 18 #include <scsi/scsi_device.h> 19 #include <scsi/scsi_transport.h> 20 #include <scsi/scsi_transport_spi.h> 21 22 #include "53c700.h" 23 24 MODULE_AUTHOR("Kars de Jong <jongk@linux-m68k.org>"); 25 MODULE_DESCRIPTION("MVME16x NCR53C710 driver"); 26 MODULE_LICENSE("GPL"); 27 28 static struct scsi_host_template mvme16x_scsi_driver_template = { 29 .name = "MVME16x NCR53c710 SCSI", 30 .proc_name = "MVME16x", 31 .this_id = 7, 32 .module = THIS_MODULE, 33 }; 34 35 static struct platform_device *mvme16x_scsi_device; 36 37 static int mvme16x_probe(struct platform_device *dev) 38 { 39 struct Scsi_Host * host = NULL; 40 struct NCR_700_Host_Parameters *hostdata; 41 42 if (!MACH_IS_MVME16x) 43 goto out; 44 45 if (mvme16x_config & MVME16x_CONFIG_NO_SCSICHIP) { 46 printk(KERN_INFO "mvme16x-scsi: detection disabled, " 47 "SCSI chip not present\n"); 48 goto out; 49 } 50 51 hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL); 52 if (hostdata == NULL) { 53 printk(KERN_ERR "mvme16x-scsi: " 54 "Failed to allocate host data\n"); 55 goto out; 56 } 57 58 /* Fill in the required pieces of hostdata */ 59 hostdata->base = (void __iomem *)0xfff47000UL; 60 hostdata->clock = 50; /* XXX - depends on the CPU clock! */ 61 hostdata->chip710 = 1; 62 hostdata->dmode_extra = DMODE_FC2; 63 hostdata->dcntl_extra = EA_710; 64 hostdata->ctest7_extra = CTEST7_TT1; 65 66 /* and register the chip */ 67 host = NCR_700_detect(&mvme16x_scsi_driver_template, hostdata, 68 &dev->dev); 69 if (!host) { 70 printk(KERN_ERR "mvme16x-scsi: No host detected; " 71 "board configuration problem?\n"); 72 goto out_free; 73 } 74 host->this_id = 7; 75 host->base = 0xfff47000UL; 76 host->irq = MVME16x_IRQ_SCSI; 77 if (request_irq(host->irq, NCR_700_intr, 0, "mvme16x-scsi", host)) { 78 printk(KERN_ERR "mvme16x-scsi: request_irq failed\n"); 79 goto out_put_host; 80 } 81 82 /* Enable scsi chip ints */ 83 { 84 volatile unsigned long v; 85 86 /* Enable scsi interrupts at level 4 in PCCchip2 */ 87 v = in_be32(0xfff4202c); 88 v = (v & ~0xff) | 0x10 | 4; 89 out_be32(0xfff4202c, v); 90 } 91 92 platform_set_drvdata(dev, host); 93 scsi_scan_host(host); 94 95 return 0; 96 97 out_put_host: 98 scsi_host_put(host); 99 out_free: 100 kfree(hostdata); 101 out: 102 return -ENODEV; 103 } 104 105 static int mvme16x_device_remove(struct platform_device *dev) 106 { 107 struct Scsi_Host *host = platform_get_drvdata(dev); 108 struct NCR_700_Host_Parameters *hostdata = shost_priv(host); 109 110 /* Disable scsi chip ints */ 111 { 112 volatile unsigned long v; 113 114 v = in_be32(0xfff4202c); 115 v &= ~0x10; 116 out_be32(0xfff4202c, v); 117 } 118 scsi_remove_host(host); 119 NCR_700_release(host); 120 kfree(hostdata); 121 free_irq(host->irq, host); 122 123 return 0; 124 } 125 126 static struct platform_driver mvme16x_scsi_driver = { 127 .driver = { 128 .name = "mvme16x-scsi", 129 }, 130 .probe = mvme16x_probe, 131 .remove = mvme16x_device_remove, 132 }; 133 134 static int __init mvme16x_scsi_init(void) 135 { 136 int err; 137 138 err = platform_driver_register(&mvme16x_scsi_driver); 139 if (err) 140 return err; 141 142 mvme16x_scsi_device = platform_device_register_simple("mvme16x-scsi", 143 -1, NULL, 0); 144 if (IS_ERR(mvme16x_scsi_device)) { 145 platform_driver_unregister(&mvme16x_scsi_driver); 146 return PTR_ERR(mvme16x_scsi_device); 147 } 148 149 return 0; 150 } 151 152 static void __exit mvme16x_scsi_exit(void) 153 { 154 platform_device_unregister(mvme16x_scsi_device); 155 platform_driver_unregister(&mvme16x_scsi_driver); 156 } 157 158 module_init(mvme16x_scsi_init); 159 module_exit(mvme16x_scsi_exit); 160