mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 13:43:55 +08:00
b6488f97d3
This patch splits the NCR5380_init() function into two parts, similar to the scheme used with atari_NCR5380.c. This avoids two problems. Firstly, NCR5380_init() may perform a bus reset, which would cause the chip to assert IRQ. The chip is unable to mask its bus reset interrupt. Drivers can't call request_irq() before calling NCR5380_init(), because initialization must happen before the interrupt handler executes. If driver initialization causes an interrupt it may be problematic on some platforms. To avoid that, first move the bus reset code into NCR5380_maybe_reset_bus(). Secondly, NCR5380_init() contains some board-specific interrupt setup code for the NCR53C400 that does not belong in the core driver. In moving this code, better not re-order interrupt initialization and bus reset. Again, the solution is to move the bus reset code into NCR5380_maybe_reset_bus(). Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Reviewed-by: Hannes Reinecke <hare@suse.com> Tested-by: Ondrej Zary <linux@rainbow-software.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
163 lines
4.1 KiB
C
163 lines
4.1 KiB
C
/*
|
|
dmx3191d.c - driver for the Domex DMX3191D SCSI card.
|
|
Copyright (C) 2000 by Massimo Piccioni <dafastidio@libero.it>
|
|
Portions Copyright (C) 2004 by Christoph Hellwig <hch@lst.de>
|
|
|
|
Based on the generic NCR5380 driver by Drew Eckhardt et al.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/interrupt.h>
|
|
#include <asm/io.h>
|
|
|
|
#include <scsi/scsi_host.h>
|
|
|
|
/*
|
|
* Definitions for the generic 5380 driver.
|
|
*/
|
|
|
|
#define DONT_USE_INTR
|
|
|
|
#define NCR5380_read(reg) inb(instance->io_port + reg)
|
|
#define NCR5380_write(reg, value) outb(value, instance->io_port + reg)
|
|
|
|
#define NCR5380_implementation_fields /* none */
|
|
|
|
/*
|
|
* Includes needed for NCR5380.[ch] (XXX: Move them to NCR5380.h)
|
|
*/
|
|
#include <linux/delay.h>
|
|
|
|
#include "NCR5380.h"
|
|
#include "NCR5380.c"
|
|
|
|
#define DMX3191D_DRIVER_NAME "dmx3191d"
|
|
#define DMX3191D_REGION_LEN 8
|
|
|
|
|
|
static struct scsi_host_template dmx3191d_driver_template = {
|
|
.proc_name = DMX3191D_DRIVER_NAME,
|
|
.name = "Domex DMX3191D",
|
|
.info = NCR5380_info,
|
|
.queuecommand = NCR5380_queue_command,
|
|
.eh_abort_handler = NCR5380_abort,
|
|
.eh_bus_reset_handler = NCR5380_bus_reset,
|
|
.can_queue = 32,
|
|
.this_id = 7,
|
|
.sg_tablesize = SG_ALL,
|
|
.cmd_per_lun = 2,
|
|
.use_clustering = DISABLE_CLUSTERING,
|
|
};
|
|
|
|
static int dmx3191d_probe_one(struct pci_dev *pdev,
|
|
const struct pci_device_id *id)
|
|
{
|
|
struct Scsi_Host *shost;
|
|
unsigned long io;
|
|
int error = -ENODEV;
|
|
|
|
if (pci_enable_device(pdev))
|
|
goto out;
|
|
|
|
io = pci_resource_start(pdev, 0);
|
|
if (!request_region(io, DMX3191D_REGION_LEN, DMX3191D_DRIVER_NAME)) {
|
|
printk(KERN_ERR "dmx3191: region 0x%lx-0x%lx already reserved\n",
|
|
io, io + DMX3191D_REGION_LEN);
|
|
goto out_disable_device;
|
|
}
|
|
|
|
shost = scsi_host_alloc(&dmx3191d_driver_template,
|
|
sizeof(struct NCR5380_hostdata));
|
|
if (!shost)
|
|
goto out_release_region;
|
|
shost->io_port = io;
|
|
|
|
/* This card does not seem to raise an interrupt on pdev->irq.
|
|
* Steam-powered SCSI controllers run without an IRQ anyway.
|
|
*/
|
|
shost->irq = NO_IRQ;
|
|
|
|
NCR5380_init(shost, FLAG_NO_PSEUDO_DMA | FLAG_DTC3181E);
|
|
|
|
NCR5380_maybe_reset_bus(shost);
|
|
|
|
pci_set_drvdata(pdev, shost);
|
|
|
|
error = scsi_add_host(shost, &pdev->dev);
|
|
if (error)
|
|
goto out_release_region;
|
|
|
|
scsi_scan_host(shost);
|
|
return 0;
|
|
|
|
out_release_region:
|
|
release_region(io, DMX3191D_REGION_LEN);
|
|
out_disable_device:
|
|
pci_disable_device(pdev);
|
|
out:
|
|
return error;
|
|
}
|
|
|
|
static void dmx3191d_remove_one(struct pci_dev *pdev)
|
|
{
|
|
struct Scsi_Host *shost = pci_get_drvdata(pdev);
|
|
|
|
scsi_remove_host(shost);
|
|
|
|
NCR5380_exit(shost);
|
|
|
|
release_region(shost->io_port, DMX3191D_REGION_LEN);
|
|
pci_disable_device(pdev);
|
|
|
|
scsi_host_put(shost);
|
|
}
|
|
|
|
static struct pci_device_id dmx3191d_pci_tbl[] = {
|
|
{PCI_VENDOR_ID_DOMEX, PCI_DEVICE_ID_DOMEX_DMX3191D,
|
|
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4},
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(pci, dmx3191d_pci_tbl);
|
|
|
|
static struct pci_driver dmx3191d_pci_driver = {
|
|
.name = DMX3191D_DRIVER_NAME,
|
|
.id_table = dmx3191d_pci_tbl,
|
|
.probe = dmx3191d_probe_one,
|
|
.remove = dmx3191d_remove_one,
|
|
};
|
|
|
|
static int __init dmx3191d_init(void)
|
|
{
|
|
return pci_register_driver(&dmx3191d_pci_driver);
|
|
}
|
|
|
|
static void __exit dmx3191d_exit(void)
|
|
{
|
|
pci_unregister_driver(&dmx3191d_pci_driver);
|
|
}
|
|
|
|
module_init(dmx3191d_init);
|
|
module_exit(dmx3191d_exit);
|
|
|
|
MODULE_AUTHOR("Massimo Piccioni <dafastidio@libero.it>");
|
|
MODULE_DESCRIPTION("Domex DMX3191D SCSI driver");
|
|
MODULE_LICENSE("GPL");
|