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 <asm/mvme16xhw.h> 16 #include <scsi/scsi_host.h> 17 #include <scsi/scsi_device.h> 18 #include <scsi/scsi_transport.h> 19 #include <scsi/scsi_transport_spi.h> 20 21 #include "53c700.h" 22 23 MODULE_AUTHOR("Kars de Jong <jongk@linux-m68k.org>"); 24 MODULE_DESCRIPTION("MVME16x NCR53C710 driver"); 25 MODULE_LICENSE("GPL"); 26 27 static struct scsi_host_template mvme16x_scsi_driver_template = { 28 .name = "MVME16x NCR53c710 SCSI", 29 .proc_name = "MVME16x", 30 .this_id = 7, 31 .module = THIS_MODULE, 32 }; 33 34 static struct platform_device *mvme16x_scsi_device; 35 36 static __devinit int 37 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, dev); 68 if (!host) { 69 printk(KERN_ERR "mvme16x-scsi: No host detected; " 70 "board configuration problem?\n"); 71 goto out_free; 72 } 73 host->this_id = 7; 74 host->base = 0xfff47000UL; 75 host->irq = MVME16x_IRQ_SCSI; 76 if (request_irq(host->irq, NCR_700_intr, 0, "mvme16x-scsi", host)) { 77 printk(KERN_ERR "mvme16x-scsi: request_irq failed\n"); 78 goto out_put_host; 79 } 80 81 /* Enable scsi chip ints */ 82 { 83 volatile unsigned long v; 84 85 /* Enable scsi interrupts at level 4 in PCCchip2 */ 86 v = in_be32(0xfff4202c); 87 v = (v & ~0xff) | 0x10 | 4; 88 out_be32(0xfff4202c, v); 89 } 90 91 platform_set_drvdata(dev, host); 92 scsi_scan_host(host); 93 94 return 0; 95 96 out_put_host: 97 scsi_host_put(host); 98 out_free: 99 kfree(hostdata); 100 out: 101 return -ENODEV; 102 } 103 104 static __devexit int 105 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 .owner = THIS_MODULE, 130 }, 131 .probe = mvme16x_probe, 132 .remove = __devexit_p(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