Kars de Jong | a16efc1 | 2007-06-17 14:47:08 +0200 | [diff] [blame^] | 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/amigaints.h> |
| 16 | #include <scsi/scsi_host.h> |
| 17 | #include <scsi/scsi_transport_spi.h> |
| 18 | |
| 19 | #include "53c700.h" |
| 20 | |
| 21 | MODULE_AUTHOR("Alan Hourihane <alanh@fairlite.demon.co.uk> / Kars de Jong <jongk@linux-m68k.org>"); |
| 22 | MODULE_DESCRIPTION("Amiga A4000T NCR53C710 driver"); |
| 23 | MODULE_LICENSE("GPL"); |
| 24 | |
| 25 | |
| 26 | static struct scsi_host_template a4000t_scsi_driver_template = { |
| 27 | .name = "A4000T builtin SCSI", |
| 28 | .proc_name = "A4000t", |
| 29 | .this_id = 7, |
| 30 | .module = THIS_MODULE, |
| 31 | }; |
| 32 | |
| 33 | static struct platform_device *a4000t_scsi_device; |
| 34 | |
| 35 | #define A4000T_SCSI_ADDR 0xdd0040 |
| 36 | |
| 37 | static int __devinit a4000t_probe(struct device *dev) |
| 38 | { |
| 39 | struct Scsi_Host * host = NULL; |
| 40 | struct NCR_700_Host_Parameters *hostdata; |
| 41 | |
| 42 | if (!(MACH_IS_AMIGA && AMIGAHW_PRESENT(A4000_SCSI))) |
| 43 | goto out; |
| 44 | |
| 45 | if (!request_mem_region(A4000T_SCSI_ADDR, 0x1000, |
| 46 | "A4000T builtin SCSI")) |
| 47 | goto out; |
| 48 | |
| 49 | hostdata = kmalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL); |
| 50 | if (hostdata == NULL) { |
| 51 | printk(KERN_ERR "a4000t-scsi: Failed to allocate host data\n"); |
| 52 | goto out_release; |
| 53 | } |
| 54 | memset(hostdata, 0, sizeof(struct NCR_700_Host_Parameters)); |
| 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 | scsi_scan_host(host); |
| 82 | |
| 83 | return 0; |
| 84 | |
| 85 | out_put_host: |
| 86 | scsi_host_put(host); |
| 87 | out_free: |
| 88 | kfree(hostdata); |
| 89 | out_release: |
| 90 | release_mem_region(A4000T_SCSI_ADDR, 0x1000); |
| 91 | out: |
| 92 | return -ENODEV; |
| 93 | } |
| 94 | |
| 95 | static __devexit int a4000t_device_remove(struct device *dev) |
| 96 | { |
| 97 | struct Scsi_Host *host = dev_to_shost(dev); |
| 98 | struct NCR_700_Host_Parameters *hostdata = shost_priv(host); |
| 99 | |
| 100 | scsi_remove_host(host); |
| 101 | |
| 102 | NCR_700_release(host); |
| 103 | kfree(hostdata); |
| 104 | free_irq(host->irq, host); |
| 105 | release_mem_region(A4000T_SCSI_ADDR, 0x1000); |
| 106 | |
| 107 | return 0; |
| 108 | } |
| 109 | |
| 110 | static struct device_driver a4000t_scsi_driver = { |
| 111 | .name = "a4000t-scsi", |
| 112 | .bus = &platform_bus_type, |
| 113 | .probe = a4000t_probe, |
| 114 | .remove = __devexit_p(a4000t_device_remove), |
| 115 | }; |
| 116 | |
| 117 | static int __init a4000t_scsi_init(void) |
| 118 | { |
| 119 | int err; |
| 120 | |
| 121 | err = driver_register(&a4000t_scsi_driver); |
| 122 | if (err) |
| 123 | return err; |
| 124 | |
| 125 | a4000t_scsi_device = platform_device_register_simple("a4000t-scsi", |
| 126 | -1, NULL, 0); |
| 127 | if (IS_ERR(a4000t_scsi_device)) { |
| 128 | driver_unregister(&a4000t_scsi_driver); |
| 129 | return PTR_ERR(a4000t_scsi_device); |
| 130 | } |
| 131 | |
| 132 | return err; |
| 133 | } |
| 134 | |
| 135 | static void __exit a4000t_scsi_exit(void) |
| 136 | { |
| 137 | platform_device_unregister(a4000t_scsi_device); |
| 138 | driver_unregister(&a4000t_scsi_driver); |
| 139 | } |
| 140 | |
| 141 | module_init(a4000t_scsi_init); |
| 142 | module_exit(a4000t_scsi_exit); |