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1// SPDX-License-Identifier: GPL-2.0-only2/*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 25static 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 0x4034 35static 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 98static void __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}110 111/*112 * amiga_a4000t_scsi_remove() lives in .exit.text. For drivers registered via113 * module_platform_driver_probe() this is ok because they cannot get unbound at114 * runtime. So mark the driver struct with __refdata to prevent modpost115 * triggering a section mismatch warning.116 */117static struct platform_driver amiga_a4000t_scsi_driver __refdata = {118 .remove_new = __exit_p(amiga_a4000t_scsi_remove),119 .driver = {120 .name = "amiga-a4000t-scsi",121 },122};123 124module_platform_driver_probe(amiga_a4000t_scsi_driver, amiga_a4000t_scsi_probe);125 126MODULE_AUTHOR("Alan Hourihane <alanh@fairlite.demon.co.uk> / "127 "Kars de Jong <jongk@linux-m68k.org>");128MODULE_DESCRIPTION("Amiga A4000T NCR53C710 driver");129MODULE_LICENSE("GPL");130MODULE_ALIAS("platform:amiga-a4000t-scsi");131