diff options
Diffstat (limited to 'drivers/scsi/a4000t.c')
| -rw-r--r-- | drivers/scsi/a4000t.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/drivers/scsi/a4000t.c b/drivers/scsi/a4000t.c new file mode 100644 index 0000000000..5e575afce1 --- /dev/null +++ b/drivers/scsi/a4000t.c @@ -0,0 +1,125 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Detection routine for the NCR53c710 based Amiga SCSI Controllers for Linux. + * Amiga Technologies A4000T SCSI controller. + * + * Written 1997 by Alan Hourihane <alanh@fairlite.demon.co.uk> + * plus modifications of the 53c7xx.c driver to support the Amiga. + * + * Rewritten to use 53c700.c by Kars de Jong <jongk@linux-m68k.org> + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/slab.h> +#include <asm/amigahw.h> +#include <asm/amigaints.h> +#include <scsi/scsi_host.h> +#include <scsi/scsi_transport_spi.h> + +#include "53c700.h" + + +static struct scsi_host_template a4000t_scsi_driver_template = { + .name = "A4000T builtin SCSI", + .proc_name = "A4000t", + .this_id = 7, + .module = THIS_MODULE, +}; + + +#define A4000T_SCSI_OFFSET 0x40 + +static int __init amiga_a4000t_scsi_probe(struct platform_device *pdev) +{ + struct resource *res; + phys_addr_t scsi_addr; + struct NCR_700_Host_Parameters *hostdata; + struct Scsi_Host *host; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -ENODEV; + + if (!request_mem_region(res->start, resource_size(res), + "A4000T builtin SCSI")) + return -EBUSY; + + hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters), + GFP_KERNEL); + if (!hostdata) { + dev_err(&pdev->dev, "Failed to allocate host data\n"); + goto out_release; + } + + scsi_addr = res->start + A4000T_SCSI_OFFSET; + + /* Fill in the required pieces of hostdata */ + hostdata->base = ZTWO_VADDR(scsi_addr); + hostdata->clock = 50; + hostdata->chip710 = 1; + hostdata->dmode_extra = DMODE_FC2; + hostdata->dcntl_extra = EA_710; + + /* and register the chip */ + host = NCR_700_detect(&a4000t_scsi_driver_template, hostdata, + &pdev->dev); + if (!host) { + dev_err(&pdev->dev, + "No host detected; board configuration problem?\n"); + goto out_free; + } + + host->this_id = 7; + host->base = scsi_addr; + host->irq = IRQ_AMIGA_PORTS; + + if (request_irq(host->irq, NCR_700_intr, IRQF_SHARED, "a4000t-scsi", + host)) { + dev_err(&pdev->dev, "request_irq failed\n"); + goto out_put_host; + } + + platform_set_drvdata(pdev, host); + scsi_scan_host(host); + return 0; + + out_put_host: + scsi_host_put(host); + out_free: + kfree(hostdata); + out_release: + release_mem_region(res->start, resource_size(res)); + return -ENODEV; +} + +static int __exit amiga_a4000t_scsi_remove(struct platform_device *pdev) +{ + struct Scsi_Host *host = platform_get_drvdata(pdev); + struct NCR_700_Host_Parameters *hostdata = shost_priv(host); + struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + + scsi_remove_host(host); + NCR_700_release(host); + kfree(hostdata); + free_irq(host->irq, host); + release_mem_region(res->start, resource_size(res)); + return 0; +} + +static struct platform_driver amiga_a4000t_scsi_driver = { + .remove = __exit_p(amiga_a4000t_scsi_remove), + .driver = { + .name = "amiga-a4000t-scsi", + }, +}; + +module_platform_driver_probe(amiga_a4000t_scsi_driver, amiga_a4000t_scsi_probe); + +MODULE_AUTHOR("Alan Hourihane <alanh@fairlite.demon.co.uk> / " + "Kars de Jong <jongk@linux-m68k.org>"); +MODULE_DESCRIPTION("Amiga A4000T NCR53C710 driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:amiga-a4000t-scsi"); |