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f67a9c1592
This is a patch, which allows not only disabling bursting but to specify different burst lenghts. This feature is needed to get the 53c700 driver working for the onboard SCSI controller of SNI RM machines, which only work reliably with a 4 word burst length. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
190 lines
4.8 KiB
C
190 lines
4.8 KiB
C
/* -*- mode: c; c-basic-offset: 8 -*- */
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/* PARISC LASI driver for the 53c700 chip
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*
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* Copyright (C) 2001 by James.Bottomley@HansenPartnership.com
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**-----------------------------------------------------------------------------
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**
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** This program is free software; you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation; either version 2 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program; if not, write to the Free Software
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** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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**
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**-----------------------------------------------------------------------------
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*/
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/*
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* Many thanks to Richard Hirst <rhirst@linuxcare.com> for patiently
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* debugging this driver on the parisc architecture and suggesting
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* many improvements and bug fixes.
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*
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* Thanks also go to Linuxcare Inc. for providing several PARISC
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* machines for me to debug the driver on.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/stat.h>
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#include <linux/mm.h>
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#include <linux/blkdev.h>
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#include <linux/sched.h>
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#include <linux/ioport.h>
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#include <linux/dma-mapping.h>
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#include <asm/page.h>
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#include <asm/pgtable.h>
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#include <asm/irq.h>
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#include <asm/hardware.h>
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#include <asm/parisc-device.h>
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#include <asm/delay.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("James Bottomley");
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MODULE_DESCRIPTION("lasi700 SCSI Driver");
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MODULE_LICENSE("GPL");
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#define LASI_700_SVERSION 0x00071
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#define LASI_710_SVERSION 0x00082
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#define LASI700_ID_TABLE { \
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.hw_type = HPHW_FIO, \
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.sversion = LASI_700_SVERSION, \
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.hversion = HVERSION_ANY_ID, \
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.hversion_rev = HVERSION_REV_ANY_ID, \
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}
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#define LASI710_ID_TABLE { \
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.hw_type = HPHW_FIO, \
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.sversion = LASI_710_SVERSION, \
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.hversion = HVERSION_ANY_ID, \
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.hversion_rev = HVERSION_REV_ANY_ID, \
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}
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#define LASI700_CLOCK 25
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#define LASI710_CLOCK 40
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#define LASI_SCSI_CORE_OFFSET 0x100
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static struct parisc_device_id lasi700_ids[] = {
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LASI700_ID_TABLE,
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LASI710_ID_TABLE,
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{ 0 }
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};
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static struct scsi_host_template lasi700_template = {
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.name = "LASI SCSI 53c700",
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.proc_name = "lasi700",
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.this_id = 7,
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.module = THIS_MODULE,
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};
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MODULE_DEVICE_TABLE(parisc, lasi700_ids);
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static int __init
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lasi700_probe(struct parisc_device *dev)
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{
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unsigned long base = dev->hpa.start + LASI_SCSI_CORE_OFFSET;
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struct NCR_700_Host_Parameters *hostdata;
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struct Scsi_Host *host;
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hostdata = kmalloc(sizeof(*hostdata), GFP_KERNEL);
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if (!hostdata) {
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printk(KERN_ERR "%s: Failed to allocate host data\n",
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dev->dev.bus_id);
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return -ENOMEM;
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}
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memset(hostdata, 0, sizeof(struct NCR_700_Host_Parameters));
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hostdata->dev = &dev->dev;
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dma_set_mask(&dev->dev, DMA_32BIT_MASK);
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hostdata->base = ioremap_nocache(base, 0x100);
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hostdata->differential = 0;
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if (dev->id.sversion == LASI_700_SVERSION) {
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hostdata->clock = LASI700_CLOCK;
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hostdata->force_le_on_be = 1;
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} else {
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hostdata->clock = LASI710_CLOCK;
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hostdata->force_le_on_be = 0;
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hostdata->chip710 = 1;
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hostdata->dmode_extra = DMODE_FC2;
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hostdata->burst_length = 8;
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}
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host = NCR_700_detect(&lasi700_template, hostdata, &dev->dev);
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if (!host)
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goto out_kfree;
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host->this_id = 7;
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host->base = base;
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host->irq = dev->irq;
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if(request_irq(dev->irq, NCR_700_intr, IRQF_SHARED, "lasi700", host)) {
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printk(KERN_ERR "lasi700: request_irq failed!\n");
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goto out_put_host;
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}
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dev_set_drvdata(&dev->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_kfree:
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iounmap(hostdata->base);
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kfree(hostdata);
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return -ENODEV;
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}
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static int __exit
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lasi700_driver_remove(struct parisc_device *dev)
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{
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struct Scsi_Host *host = dev_get_drvdata(&dev->dev);
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struct NCR_700_Host_Parameters *hostdata =
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(struct NCR_700_Host_Parameters *)host->hostdata[0];
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scsi_remove_host(host);
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NCR_700_release(host);
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free_irq(host->irq, host);
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iounmap(hostdata->base);
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kfree(hostdata);
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return 0;
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}
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static struct parisc_driver lasi700_driver = {
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.name = "lasi_scsi",
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.id_table = lasi700_ids,
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.probe = lasi700_probe,
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.remove = __devexit_p(lasi700_driver_remove),
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};
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static int __init
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lasi700_init(void)
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{
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return register_parisc_driver(&lasi700_driver);
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}
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static void __exit
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lasi700_exit(void)
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{
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unregister_parisc_driver(&lasi700_driver);
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}
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module_init(lasi700_init);
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module_exit(lasi700_exit);
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