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