1 /* 2 * Detection routine for the NCR53c710 based Amiga SCSI Controllers for Linux. 3 * Amiga Technologies A4000T SCSI controller. 4 * 5 * Written 1997 by Alan Hourihane <alanh@fairlite.demon.co.uk> 6 * plus modifications of the 53c7xx.c driver to support the Amiga. 7 * 8 * Rewritten to use 53c700.c by Kars de Jong <jongk@linux-m68k.org> 9 */ 10 11 #include <linux/module.h> 12 #include <linux/platform_device.h> 13 #include <linux/init.h> 14 #include <linux/interrupt.h> 15 #include <asm/amigahw.h> 16 #include <asm/amigaints.h> 17 #include <scsi/scsi_host.h> 18 #include <scsi/scsi_transport_spi.h> 19 20 #include "53c700.h" 21 22 MODULE_AUTHOR("Alan Hourihane <alanh@fairlite.demon.co.uk> / Kars de Jong <jongk@linux-m68k.org>"); 23 MODULE_DESCRIPTION("Amiga A4000T NCR53C710 driver"); 24 MODULE_LICENSE("GPL"); 25 26 27 static struct scsi_host_template a4000t_scsi_driver_template = { 28 .name = "A4000T builtin SCSI", 29 .proc_name = "A4000t", 30 .this_id = 7, 31 .module = THIS_MODULE, 32 }; 33 34 static struct platform_device *a4000t_scsi_device; 35 36 #define A4000T_SCSI_ADDR 0xdd0040 37 38 static int __devinit a4000t_probe(struct device *dev) 39 { 40 struct Scsi_Host *host; 41 struct NCR_700_Host_Parameters *hostdata; 42 43 if (!(MACH_IS_AMIGA && AMIGAHW_PRESENT(A4000_SCSI))) 44 goto out; 45 46 if (!request_mem_region(A4000T_SCSI_ADDR, 0x1000, 47 "A4000T builtin SCSI")) 48 goto out; 49 50 hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL); 51 if (!hostdata) { 52 printk(KERN_ERR "a4000t-scsi: Failed to allocate host data\n"); 53 goto out_release; 54 } 55 56 /* Fill in the required pieces of hostdata */ 57 hostdata->base = (void __iomem *)ZTWO_VADDR(A4000T_SCSI_ADDR); 58 hostdata->clock = 50; 59 hostdata->chip710 = 1; 60 hostdata->dmode_extra = DMODE_FC2; 61 hostdata->dcntl_extra = EA_710; 62 63 /* and register the chip */ 64 host = NCR_700_detect(&a4000t_scsi_driver_template, hostdata, dev); 65 if (!host) { 66 printk(KERN_ERR "a4000t-scsi: No host detected; " 67 "board configuration problem?\n"); 68 goto out_free; 69 } 70 71 host->this_id = 7; 72 host->base = A4000T_SCSI_ADDR; 73 host->irq = IRQ_AMIGA_PORTS; 74 75 if (request_irq(host->irq, NCR_700_intr, IRQF_SHARED, "a4000t-scsi", 76 host)) { 77 printk(KERN_ERR "a4000t-scsi: request_irq failed\n"); 78 goto out_put_host; 79 } 80 81 dev_set_drvdata(dev, host); 82 scsi_scan_host(host); 83 84 return 0; 85 86 out_put_host: 87 scsi_host_put(host); 88 out_free: 89 kfree(hostdata); 90 out_release: 91 release_mem_region(A4000T_SCSI_ADDR, 0x1000); 92 out: 93 return -ENODEV; 94 } 95 96 static __devexit int a4000t_device_remove(struct device *dev) 97 { 98 struct Scsi_Host *host = dev_get_drvdata(dev); 99 struct NCR_700_Host_Parameters *hostdata = shost_priv(host); 100 101 scsi_remove_host(host); 102 103 NCR_700_release(host); 104 kfree(hostdata); 105 free_irq(host->irq, host); 106 release_mem_region(A4000T_SCSI_ADDR, 0x1000); 107 108 return 0; 109 } 110 111 static struct device_driver a4000t_scsi_driver = { 112 .name = "a4000t-scsi", 113 .bus = &platform_bus_type, 114 .probe = a4000t_probe, 115 .remove = __devexit_p(a4000t_device_remove), 116 }; 117 118 static int __init a4000t_scsi_init(void) 119 { 120 int err; 121 122 err = driver_register(&a4000t_scsi_driver); 123 if (err) 124 return err; 125 126 a4000t_scsi_device = platform_device_register_simple("a4000t-scsi", 127 -1, NULL, 0); 128 if (IS_ERR(a4000t_scsi_device)) { 129 driver_unregister(&a4000t_scsi_driver); 130 return PTR_ERR(a4000t_scsi_device); 131 } 132 133 return err; 134 } 135 136 static void __exit a4000t_scsi_exit(void) 137 { 138 platform_device_unregister(a4000t_scsi_device); 139 driver_unregister(&a4000t_scsi_driver); 140 } 141 142 module_init(a4000t_scsi_init); 143 module_exit(a4000t_scsi_exit); 144