/drivers/scsi/lasi700.c

  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/* -*- mode: c; c-basic-offset: 8 -*- */
  3
  4/* PARISC LASI driver for the 53c700 chip
  5 *
  6 * Copyright (C) 2001 by James.Bottomley@HansenPartnership.com
  7**-----------------------------------------------------------------------------
  8**  
  9**
 10**-----------------------------------------------------------------------------
 11 */
 12
 13/*
 14 * Many thanks to Richard Hirst <rhirst@linuxcare.com> for patiently
 15 * debugging this driver on the parisc architecture and suggesting
 16 * many improvements and bug fixes.
 17 *
 18 * Thanks also go to Linuxcare Inc. for providing several PARISC
 19 * machines for me to debug the driver on.
 20 */
 21
 22#include <linux/kernel.h>
 23#include <linux/module.h>
 24#include <linux/init.h>
 25#include <linux/types.h>
 26#include <linux/stat.h>
 27#include <linux/mm.h>
 28#include <linux/blkdev.h>
 29#include <linux/ioport.h>
 30#include <linux/dma-mapping.h>
 31#include <linux/slab.h>
 32
 33#include <asm/page.h>
 34#include <asm/pgtable.h>
 35#include <asm/irq.h>
 36#include <asm/hardware.h>
 37#include <asm/parisc-device.h>
 38#include <asm/delay.h>
 39
 40#include <scsi/scsi_host.h>
 41#include <scsi/scsi_device.h>
 42#include <scsi/scsi_transport.h>
 43#include <scsi/scsi_transport_spi.h>
 44
 45#include "53c700.h"
 46
 47MODULE_AUTHOR("James Bottomley");
 48MODULE_DESCRIPTION("lasi700 SCSI Driver");
 49MODULE_LICENSE("GPL");
 50
 51#define LASI_700_SVERSION 0x00071
 52#define LASI_710_SVERSION 0x00082
 53
 54#define LASI700_ID_TABLE {			\
 55	.hw_type	= HPHW_FIO,		\
 56	.sversion	= LASI_700_SVERSION,	\
 57	.hversion	= HVERSION_ANY_ID,	\
 58	.hversion_rev	= HVERSION_REV_ANY_ID,	\
 59}
 60
 61#define LASI710_ID_TABLE {			\
 62	.hw_type	= HPHW_FIO,		\
 63	.sversion	= LASI_710_SVERSION,	\
 64	.hversion	= HVERSION_ANY_ID,	\
 65	.hversion_rev	= HVERSION_REV_ANY_ID,	\
 66}
 67
 68#define LASI700_CLOCK	25
 69#define LASI710_CLOCK	40
 70#define LASI_SCSI_CORE_OFFSET 0x100
 71
 72static const struct parisc_device_id lasi700_ids[] __initconst = {
 73	LASI700_ID_TABLE,
 74	LASI710_ID_TABLE,
 75	{ 0 }
 76};
 77
 78static struct scsi_host_template lasi700_template = {
 79	.name		= "LASI SCSI 53c700",
 80	.proc_name	= "lasi700",
 81	.this_id	= 7,
 82	.module		= THIS_MODULE,
 83};
 84MODULE_DEVICE_TABLE(parisc, lasi700_ids);
 85
 86static int __init
 87lasi700_probe(struct parisc_device *dev)
 88{
 89	unsigned long base = dev->hpa.start + LASI_SCSI_CORE_OFFSET;
 90	struct NCR_700_Host_Parameters *hostdata;
 91	struct Scsi_Host *host;
 92
 93	hostdata = kzalloc(sizeof(*hostdata), GFP_KERNEL);
 94	if (!hostdata) {
 95		dev_printk(KERN_ERR, &dev->dev, "Failed to allocate host data\n");
 96		return -ENOMEM;
 97	}
 98
 99	hostdata->dev = &dev->dev;
100	dma_set_mask(&dev->dev, DMA_BIT_MASK(32));
101	hostdata->base = ioremap(base, 0x100);
102	hostdata->differential = 0;
103
104	if (dev->id.sversion == LASI_700_SVERSION) {
105		hostdata->clock = LASI700_CLOCK;
106		hostdata->force_le_on_be = 1;
107	} else {
108		hostdata->clock = LASI710_CLOCK;
109		hostdata->force_le_on_be = 0;
110		hostdata->chip710 = 1;
111		hostdata->dmode_extra = DMODE_FC2;
112		hostdata->burst_length = 8;
113	}
114
115	host = NCR_700_detect(&lasi700_template, hostdata, &dev->dev);
116	if (!host)
117		goto out_kfree;
118	host->this_id = 7;
119	host->base = base;
120	host->irq = dev->irq;
121	if(request_irq(dev->irq, NCR_700_intr, IRQF_SHARED, "lasi700", host)) {
122		printk(KERN_ERR "lasi700: request_irq failed!\n");
123		goto out_put_host;
124	}
125
126	dev_set_drvdata(&dev->dev, host);
127	scsi_scan_host(host);
128
129	return 0;
130
131 out_put_host:
132	scsi_host_put(host);
133 out_kfree:
134	iounmap(hostdata->base);
135	kfree(hostdata);
136	return -ENODEV;
137}
138
139static int __exit
140lasi700_driver_remove(struct parisc_device *dev)
141{
142	struct Scsi_Host *host = dev_get_drvdata(&dev->dev);
143	struct NCR_700_Host_Parameters *hostdata = 
144		(struct NCR_700_Host_Parameters *)host->hostdata[0];
145
146	scsi_remove_host(host);
147	NCR_700_release(host);
148	free_irq(host->irq, host);
149	iounmap(hostdata->base);
150	kfree(hostdata);
151
152	return 0;
153}
154
155static struct parisc_driver lasi700_driver __refdata = {
156	.name =		"lasi_scsi",
157	.id_table =	lasi700_ids,
158	.probe =	lasi700_probe,
159	.remove =	__exit_p(lasi700_driver_remove),
160};
161
162static int __init
163lasi700_init(void)
164{
165	return register_parisc_driver(&lasi700_driver);
166}
167
168static void __exit
169lasi700_exit(void)
170{
171	unregister_parisc_driver(&lasi700_driver);
172}
173
174module_init(lasi700_init);
175module_exit(lasi700_exit);