diff options
Diffstat (limited to 'drivers/scsi/mvme16x_scsi.c')
| -rw-r--r-- | drivers/scsi/mvme16x_scsi.c | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/drivers/scsi/mvme16x_scsi.c b/drivers/scsi/mvme16x_scsi.c new file mode 100644 index 000000000..21d638299 --- /dev/null +++ b/drivers/scsi/mvme16x_scsi.c @@ -0,0 +1,160 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Detection routine for the NCR53c710 based MVME16x SCSI Controllers for Linux. + * + * Based on work by Alan Hourihane + * + * Rewritten to use 53c700.c by Kars de Jong <jongk@linux-m68k.org> + */ + +#include <linux/module.h> +#include <linux/blkdev.h> +#include <linux/device.h> +#include <linux/platform_device.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/slab.h> +#include <asm/mvme16xhw.h> +#include <scsi/scsi_host.h> +#include <scsi/scsi_device.h> +#include <scsi/scsi_transport.h> +#include <scsi/scsi_transport_spi.h> + +#include "53c700.h" + +MODULE_AUTHOR("Kars de Jong <jongk@linux-m68k.org>"); +MODULE_DESCRIPTION("MVME16x NCR53C710 driver"); +MODULE_LICENSE("GPL"); + +static struct scsi_host_template mvme16x_scsi_driver_template = { + .name = "MVME16x NCR53c710 SCSI", + .proc_name = "MVME16x", + .this_id = 7, + .module = THIS_MODULE, +}; + +static struct platform_device *mvme16x_scsi_device; + +static int mvme16x_probe(struct platform_device *dev) +{ + struct Scsi_Host * host = NULL; + struct NCR_700_Host_Parameters *hostdata; + + if (!MACH_IS_MVME16x) + goto out; + + if (mvme16x_config & MVME16x_CONFIG_NO_SCSICHIP) { + printk(KERN_INFO "mvme16x-scsi: detection disabled, " + "SCSI chip not present\n"); + goto out; + } + + hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL); + if (hostdata == NULL) { + printk(KERN_ERR "mvme16x-scsi: " + "Failed to allocate host data\n"); + goto out; + } + + /* Fill in the required pieces of hostdata */ + hostdata->base = (void __iomem *)0xfff47000UL; + hostdata->clock = 50; /* XXX - depends on the CPU clock! */ + hostdata->chip710 = 1; + hostdata->dmode_extra = DMODE_FC2; + hostdata->dcntl_extra = EA_710; + hostdata->ctest7_extra = CTEST7_TT1; + + /* and register the chip */ + host = NCR_700_detect(&mvme16x_scsi_driver_template, hostdata, + &dev->dev); + if (!host) { + printk(KERN_ERR "mvme16x-scsi: No host detected; " + "board configuration problem?\n"); + goto out_free; + } + host->this_id = 7; + host->base = 0xfff47000UL; + host->irq = MVME16x_IRQ_SCSI; + if (request_irq(host->irq, NCR_700_intr, 0, "mvme16x-scsi", host)) { + printk(KERN_ERR "mvme16x-scsi: request_irq failed\n"); + goto out_put_host; + } + + /* Enable scsi chip ints */ + { + volatile unsigned long v; + + /* Enable scsi interrupts at level 4 in PCCchip2 */ + v = in_be32(0xfff4202c); + v = (v & ~0xff) | 0x10 | 4; + out_be32(0xfff4202c, v); + } + + platform_set_drvdata(dev, host); + scsi_scan_host(host); + + return 0; + + out_put_host: + scsi_host_put(host); + out_free: + kfree(hostdata); + out: + return -ENODEV; +} + +static int mvme16x_device_remove(struct platform_device *dev) +{ + struct Scsi_Host *host = platform_get_drvdata(dev); + struct NCR_700_Host_Parameters *hostdata = shost_priv(host); + + /* Disable scsi chip ints */ + { + volatile unsigned long v; + + v = in_be32(0xfff4202c); + v &= ~0x10; + out_be32(0xfff4202c, v); + } + scsi_remove_host(host); + NCR_700_release(host); + kfree(hostdata); + free_irq(host->irq, host); + + return 0; +} + +static struct platform_driver mvme16x_scsi_driver = { + .driver = { + .name = "mvme16x-scsi", + }, + .probe = mvme16x_probe, + .remove = mvme16x_device_remove, +}; + +static int __init mvme16x_scsi_init(void) +{ + int err; + + err = platform_driver_register(&mvme16x_scsi_driver); + if (err) + return err; + + mvme16x_scsi_device = platform_device_register_simple("mvme16x-scsi", + -1, NULL, 0); + if (IS_ERR(mvme16x_scsi_device)) { + platform_driver_unregister(&mvme16x_scsi_driver); + return PTR_ERR(mvme16x_scsi_device); + } + + return 0; +} + +static void __exit mvme16x_scsi_exit(void) +{ + platform_device_unregister(mvme16x_scsi_device); + platform_driver_unregister(&mvme16x_scsi_driver); +} + +module_init(mvme16x_scsi_init); +module_exit(mvme16x_scsi_exit); |