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160 lines
3.7 KiB
160 lines
3.7 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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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 <[email protected]> |
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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 <[email protected]>"); |
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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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}, |
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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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