/drivers/scsi/a4000t.c

  1/*
  2 * Detection routine for the NCR53c710 based Amiga SCSI Controllers for Linux.
  3 *		Amiga Technologies A4000T SCSI controller.
  4 *
  5 * Written 1997 by Alan Hourihane <alanh@fairlite.demon.co.uk>
  6 * plus modifications of the 53c7xx.c driver to support the Amiga.
  7 *
  8 * Rewritten to use 53c700.c by Kars de Jong <jongk@linux-m68k.org>
  9 */
 10
 11#include <linux/module.h>
 12#include <linux/platform_device.h>
 13#include <linux/init.h>
 14#include <linux/interrupt.h>
 15#include <linux/slab.h>
 16#include <asm/amigahw.h>
 17#include <asm/amigaints.h>
 18#include <scsi/scsi_host.h>
 19#include <scsi/scsi_transport_spi.h>
 20
 21#include "53c700.h"
 22
 23MODULE_AUTHOR("Alan Hourihane <alanh@fairlite.demon.co.uk> / Kars de Jong <jongk@linux-m68k.org>");
 24MODULE_DESCRIPTION("Amiga A4000T NCR53C710 driver");
 25MODULE_LICENSE("GPL");
 26
 27
 28static struct scsi_host_template a4000t_scsi_driver_template = {
 29	.name		= "A4000T builtin SCSI",
 30	.proc_name	= "A4000t",
 31	.this_id	= 7,
 32	.module		= THIS_MODULE,
 33};
 34
 35static struct platform_device *a4000t_scsi_device;
 36
 37#define A4000T_SCSI_ADDR 0xdd0040
 38
 39static int __devinit a4000t_probe(struct platform_device *dev)
 40{
 41	struct Scsi_Host *host;
 42	struct NCR_700_Host_Parameters *hostdata;
 43
 44	if (!(MACH_IS_AMIGA && AMIGAHW_PRESENT(A4000_SCSI)))
 45		goto out;
 46
 47	if (!request_mem_region(A4000T_SCSI_ADDR, 0x1000,
 48				"A4000T builtin SCSI"))
 49		goto out;
 50
 51	hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL);
 52	if (!hostdata) {
 53		printk(KERN_ERR "a4000t-scsi: Failed to allocate host data\n");
 54		goto out_release;
 55	}
 56
 57	/* Fill in the required pieces of hostdata */
 58	hostdata->base = (void __iomem *)ZTWO_VADDR(A4000T_SCSI_ADDR);
 59	hostdata->clock = 50;
 60	hostdata->chip710 = 1;
 61	hostdata->dmode_extra = DMODE_FC2;
 62	hostdata->dcntl_extra = EA_710;
 63
 64	/* and register the chip */
 65	host = NCR_700_detect(&a4000t_scsi_driver_template, hostdata,
 66			      &dev->dev);
 67	if (!host) {
 68		printk(KERN_ERR "a4000t-scsi: No host detected; "
 69				"board configuration problem?\n");
 70		goto out_free;
 71	}
 72
 73	host->this_id = 7;
 74	host->base = A4000T_SCSI_ADDR;
 75	host->irq = IRQ_AMIGA_PORTS;
 76
 77	if (request_irq(host->irq, NCR_700_intr, IRQF_SHARED, "a4000t-scsi",
 78			host)) {
 79		printk(KERN_ERR "a4000t-scsi: request_irq failed\n");
 80		goto out_put_host;
 81	}
 82
 83	platform_set_drvdata(dev, host);
 84	scsi_scan_host(host);
 85
 86	return 0;
 87
 88 out_put_host:
 89	scsi_host_put(host);
 90 out_free:
 91	kfree(hostdata);
 92 out_release:
 93	release_mem_region(A4000T_SCSI_ADDR, 0x1000);
 94 out:
 95	return -ENODEV;
 96}
 97
 98static __devexit int a4000t_device_remove(struct platform_device *dev)
 99{
100	struct Scsi_Host *host = platform_get_drvdata(dev);
101	struct NCR_700_Host_Parameters *hostdata = shost_priv(host);
102
103	scsi_remove_host(host);
104
105	NCR_700_release(host);
106	kfree(hostdata);
107	free_irq(host->irq, host);
108	release_mem_region(A4000T_SCSI_ADDR, 0x1000);
109
110	return 0;
111}
112
113static struct platform_driver a4000t_scsi_driver = {
114	.driver = {
115		.name           = "a4000t-scsi",
116		.owner          = THIS_MODULE,
117	},
118	.probe          = a4000t_probe,
119	.remove         = __devexit_p(a4000t_device_remove),
120};
121
122static int __init a4000t_scsi_init(void)
123{
124	int err;
125
126	err = platform_driver_register(&a4000t_scsi_driver);
127	if (err)
128		return err;
129
130	a4000t_scsi_device = platform_device_register_simple("a4000t-scsi",
131			-1, NULL, 0);
132	if (IS_ERR(a4000t_scsi_device)) {
133		platform_driver_unregister(&a4000t_scsi_driver);
134		return PTR_ERR(a4000t_scsi_device);
135	}
136
137	return err;
138}
139
140static void __exit a4000t_scsi_exit(void)
141{
142	platform_device_unregister(a4000t_scsi_device);
143	platform_driver_unregister(&a4000t_scsi_driver);
144}
145
146module_init(a4000t_scsi_init);
147module_exit(a4000t_scsi_exit);