1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* -*- mode: c; c-basic-offset: 8 -*- */
3
4 /* SNI RM driver
5 *
6 * Copyright (C) 2001 by James.Bottomley@HansenPartnership.com
7 **-----------------------------------------------------------------------------
8 **
9 **
10 **-----------------------------------------------------------------------------
11 */
12
13 /*
14 * Based on lasi700.c
15 */
16
17 #include <linux/kernel.h>
18 #include <linux/module.h>
19 #include <linux/init.h>
20 #include <linux/types.h>
21 #include <linux/slab.h>
22 #include <linux/stat.h>
23 #include <linux/mm.h>
24 #include <linux/blkdev.h>
25 #include <linux/sched.h>
26 #include <linux/ioport.h>
27 #include <linux/dma-mapping.h>
28 #include <linux/platform_device.h>
29
30 #include <asm/page.h>
31 #include <asm/pgtable.h>
32 #include <asm/irq.h>
33 #include <asm/delay.h>
34
35 #include <scsi/scsi_host.h>
36 #include <scsi/scsi_device.h>
37 #include <scsi/scsi_transport.h>
38 #include <scsi/scsi_transport_spi.h>
39
40 #include "53c700.h"
41
42 MODULE_AUTHOR("Thomas Bogendörfer");
43 MODULE_DESCRIPTION("SNI RM 53c710 SCSI Driver");
44 MODULE_LICENSE("GPL");
45 MODULE_ALIAS("platform:snirm_53c710");
46
47 #define SNIRM710_CLOCK 32
48
49 static struct scsi_host_template snirm710_template = {
50 .name = "SNI RM SCSI 53c710",
51 .proc_name = "snirm_53c710",
52 .this_id = 7,
53 .module = THIS_MODULE,
54 };
55
snirm710_probe(struct platform_device * dev)56 static int snirm710_probe(struct platform_device *dev)
57 {
58 unsigned long base;
59 struct NCR_700_Host_Parameters *hostdata;
60 struct Scsi_Host *host;
61 struct resource *res;
62 int rc;
63
64 res = platform_get_resource(dev, IORESOURCE_MEM, 0);
65 if (!res)
66 return -ENODEV;
67
68 base = res->start;
69 hostdata = kzalloc(sizeof(*hostdata), GFP_KERNEL);
70 if (!hostdata)
71 return -ENOMEM;
72
73 hostdata->dev = &dev->dev;
74 dma_set_mask(&dev->dev, DMA_BIT_MASK(32));
75 hostdata->base = ioremap_nocache(base, 0x100);
76 hostdata->differential = 0;
77
78 hostdata->clock = SNIRM710_CLOCK;
79 hostdata->force_le_on_be = 1;
80 hostdata->chip710 = 1;
81 hostdata->burst_length = 4;
82
83 host = NCR_700_detect(&snirm710_template, hostdata, &dev->dev);
84 if (!host)
85 goto out_kfree;
86 host->this_id = 7;
87 host->base = base;
88 host->irq = rc = platform_get_irq(dev, 0);
89 if (rc < 0)
90 goto out_put_host;
91 if(request_irq(host->irq, NCR_700_intr, IRQF_SHARED, "snirm710", host)) {
92 printk(KERN_ERR "snirm710: request_irq failed!\n");
93 goto out_put_host;
94 }
95
96 dev_set_drvdata(&dev->dev, host);
97 scsi_scan_host(host);
98
99 return 0;
100
101 out_put_host:
102 scsi_host_put(host);
103 out_kfree:
104 iounmap(hostdata->base);
105 kfree(hostdata);
106 return -ENODEV;
107 }
108
snirm710_driver_remove(struct platform_device * dev)109 static int snirm710_driver_remove(struct platform_device *dev)
110 {
111 struct Scsi_Host *host = dev_get_drvdata(&dev->dev);
112 struct NCR_700_Host_Parameters *hostdata =
113 (struct NCR_700_Host_Parameters *)host->hostdata[0];
114
115 scsi_remove_host(host);
116 NCR_700_release(host);
117 free_irq(host->irq, host);
118 iounmap(hostdata->base);
119 kfree(hostdata);
120
121 return 0;
122 }
123
124 static struct platform_driver snirm710_driver = {
125 .probe = snirm710_probe,
126 .remove = snirm710_driver_remove,
127 .driver = {
128 .name = "snirm_53c710",
129 },
130 };
131
snirm710_init(void)132 static int __init snirm710_init(void)
133 {
134 return platform_driver_register(&snirm710_driver);
135 }
136
snirm710_exit(void)137 static void __exit snirm710_exit(void)
138 {
139 platform_driver_unregister(&snirm710_driver);
140 }
141
142 module_init(snirm710_init);
143 module_exit(snirm710_exit);
144