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 
45 MODULE_AUTHOR("James Bottomley");
46 MODULE_DESCRIPTION("lasi700 SCSI Driver");
47 MODULE_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 
70 static const struct parisc_device_id lasi700_ids[] __initconst = {
71 	LASI700_ID_TABLE,
72 	LASI710_ID_TABLE,
73 	{ 0 }
74 };
75 
76 static struct scsi_host_template lasi700_template = {
77 	.name		= "LASI SCSI 53c700",
78 	.proc_name	= "lasi700",
79 	.this_id	= 7,
80 	.module		= THIS_MODULE,
81 };
82 MODULE_DEVICE_TABLE(parisc, lasi700_ids);
83 
84 static int __init
lasi700_probe(struct parisc_device * dev)85 lasi700_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 
137 static void __exit
lasi700_driver_remove(struct parisc_device * dev)138 lasi700_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 
151 static 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 
158 static int __init
lasi700_init(void)159 lasi700_init(void)
160 {
161 	return register_parisc_driver(&lasi700_driver);
162 }
163 
164 static void __exit
lasi700_exit(void)165 lasi700_exit(void)
166 {
167 	unregister_parisc_driver(&lasi700_driver);
168 }
169 
170 module_init(lasi700_init);
171 module_exit(lasi700_exit);
172