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_obj(struct NCR_700_Host_Parameters); 51 if (!hostdata) { 52 dev_err(&pdev->dev, "Failed to allocate host data\n"); 53 goto out_release; 54 } 55 56 scsi_addr = res->start + A4000T_SCSI_OFFSET; 57 58 /* Fill in the required pieces of hostdata */ 59 hostdata->base = ZTWO_VADDR(scsi_addr); 60 hostdata->clock = 50; 61 hostdata->chip710 = 1; 62 hostdata->dmode_extra = DMODE_FC2; 63 hostdata->dcntl_extra = EA_710; 64 65 /* and register the chip */ 66 host = NCR_700_detect(&a4000t_scsi_driver_template, hostdata, 67 &pdev->dev); 68 if (!host) { 69 dev_err(&pdev->dev, 70 "No host detected; board configuration problem?\n"); 71 goto out_free; 72 } 73 74 host->this_id = 7; 75 host->base = scsi_addr; 76 host->irq = IRQ_AMIGA_PORTS; 77 78 if (request_irq(host->irq, NCR_700_intr, IRQF_SHARED, "a4000t-scsi", 79 host)) { 80 dev_err(&pdev->dev, "request_irq failed\n"); 81 goto out_put_host; 82 } 83 84 platform_set_drvdata(pdev, host); 85 scsi_scan_host(host); 86 return 0; 87 88 out_put_host: 89 scsi_host_put(host); 90 out_free: 91 kfree(hostdata); 92 out_release: 93 release_mem_region(res->start, resource_size(res)); 94 return -ENODEV; 95 } 96 97 static void __exit amiga_a4000t_scsi_remove(struct platform_device *pdev) 98 { 99 struct Scsi_Host *host = platform_get_drvdata(pdev); 100 struct NCR_700_Host_Parameters *hostdata = shost_priv(host); 101 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 102 103 scsi_remove_host(host); 104 NCR_700_release(host); 105 kfree(hostdata); 106 free_irq(host->irq, host); 107 release_mem_region(res->start, resource_size(res)); 108 } 109 110 /* 111 * amiga_a4000t_scsi_remove() lives in .exit.text. For drivers registered via 112 * module_platform_driver_probe() this is ok because they cannot get unbound at 113 * runtime. So mark the driver struct with __refdata to prevent modpost 114 * triggering a section mismatch warning. 115 */ 116 static struct platform_driver amiga_a4000t_scsi_driver __refdata = { 117 .remove = __exit_p(amiga_a4000t_scsi_remove), 118 .driver = { 119 .name = "amiga-a4000t-scsi", 120 }, 121 }; 122 123 module_platform_driver_probe(amiga_a4000t_scsi_driver, amiga_a4000t_scsi_probe); 124 125 MODULE_AUTHOR("Alan Hourihane <alanh@fairlite.demon.co.uk> / " 126 "Kars de Jong <jongk@linux-m68k.org>"); 127 MODULE_DESCRIPTION("Amiga A4000T NCR53C710 driver"); 128 MODULE_LICENSE("GPL"); 129 MODULE_ALIAS("platform:amiga-a4000t-scsi"); 130