1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Detection routine for the NCR53c710 based Amiga SCSI Controllers for Linux. 4 * Amiga Technologies A4000T SCSI controller. 5 * 6 * Written 1997 by Alan Hourihane <alanh@fairlite.demon.co.uk> 7 * plus modifications of the 53c7xx.c driver to support the Amiga. 8 * 9 * Rewritten to use 53c700.c by Kars de Jong <jongk@linux-m68k.org> 10 */ 11 12 #include <linux/module.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/amigahw.h> 18 #include <asm/amigaints.h> 19 #include <scsi/scsi_host.h> 20 #include <scsi/scsi_transport_spi.h> 21 22 #include "53c700.h" 23 24 25 static struct scsi_host_template a4000t_scsi_driver_template = { 26 .name = "A4000T builtin SCSI", 27 .proc_name = "A4000t", 28 .this_id = 7, 29 .module = THIS_MODULE, 30 }; 31 32 33 #define A4000T_SCSI_OFFSET 0x40 34 35 static int __init amiga_a4000t_scsi_probe(struct platform_device *pdev) 36 { 37 struct resource *res; 38 phys_addr_t scsi_addr; 39 struct NCR_700_Host_Parameters *hostdata; 40 struct Scsi_Host *host; 41 42 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 43 if (!res) 44 return -ENODEV; 45 46 if (!request_mem_region(res->start, resource_size(res), 47 "A4000T builtin SCSI")) 48 return -EBUSY; 49 50 hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters), 51 GFP_KERNEL); 52 if (!hostdata) { 53 dev_err(&pdev->dev, "Failed to allocate host data\n"); 54 goto out_release; 55 } 56 57 scsi_addr = res->start + A4000T_SCSI_OFFSET; 58 59 /* Fill in the required pieces of hostdata */ 60 hostdata->base = ZTWO_VADDR(scsi_addr); 61 hostdata->clock = 50; 62 hostdata->chip710 = 1; 63 hostdata->dmode_extra = DMODE_FC2; 64 hostdata->dcntl_extra = EA_710; 65 66 /* and register the chip */ 67 host = NCR_700_detect(&a4000t_scsi_driver_template, hostdata, 68 &pdev->dev); 69 if (!host) { 70 dev_err(&pdev->dev, 71 "No host detected; board configuration problem?\n"); 72 goto out_free; 73 } 74 75 host->this_id = 7; 76 host->base = scsi_addr; 77 host->irq = IRQ_AMIGA_PORTS; 78 79 if (request_irq(host->irq, NCR_700_intr, IRQF_SHARED, "a4000t-scsi", 80 host)) { 81 dev_err(&pdev->dev, "request_irq failed\n"); 82 goto out_put_host; 83 } 84 85 platform_set_drvdata(pdev, host); 86 scsi_scan_host(host); 87 return 0; 88 89 out_put_host: 90 scsi_host_put(host); 91 out_free: 92 kfree(hostdata); 93 out_release: 94 release_mem_region(res->start, resource_size(res)); 95 return -ENODEV; 96 } 97 98 static int __exit amiga_a4000t_scsi_remove(struct platform_device *pdev) 99 { 100 struct Scsi_Host *host = platform_get_drvdata(pdev); 101 struct NCR_700_Host_Parameters *hostdata = shost_priv(host); 102 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 103 104 scsi_remove_host(host); 105 NCR_700_release(host); 106 kfree(hostdata); 107 free_irq(host->irq, host); 108 release_mem_region(res->start, resource_size(res)); 109 return 0; 110 } 111 112 static struct platform_driver amiga_a4000t_scsi_driver = { 113 .remove = __exit_p(amiga_a4000t_scsi_remove), 114 .driver = { 115 .name = "amiga-a4000t-scsi", 116 }, 117 }; 118 119 module_platform_driver_probe(amiga_a4000t_scsi_driver, amiga_a4000t_scsi_probe); 120 121 MODULE_AUTHOR("Alan Hourihane <alanh@fairlite.demon.co.uk> / " 122 "Kars de Jong <jongk@linux-m68k.org>"); 123 MODULE_DESCRIPTION("Amiga A4000T NCR53C710 driver"); 124 MODULE_LICENSE("GPL"); 125 MODULE_ALIAS("platform:amiga-a4000t-scsi"); 126