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