1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Detection routine for the NCR53c710 based BVME6000 SCSI Controllers for Linux.
4  *
5  * Based on work by Alan Hourihane and Kars de Jong
6  *
7  * Rewritten to use 53c700.c by Richard Hirst <richard@sleepie.demon.co.uk>
8  */
9 
10 #include <linux/module.h>
11 #include <linux/blkdev.h>
12 #include <linux/device.h>
13 #include <linux/platform_device.h>
14 #include <linux/init.h>
15 #include <linux/interrupt.h>
16 #include <linux/slab.h>
17 #include <asm/bvme6000hw.h>
18 #include <scsi/scsi_host.h>
19 #include <scsi/scsi_device.h>
20 #include <scsi/scsi_transport.h>
21 #include <scsi/scsi_transport_spi.h>
22 
23 #include "53c700.h"
24 
25 MODULE_AUTHOR("Richard Hirst <richard@sleepie.demon.co.uk>");
26 MODULE_DESCRIPTION("BVME6000 NCR53C710 driver");
27 MODULE_LICENSE("GPL");
28 
29 static struct scsi_host_template bvme6000_scsi_driver_template = {
30 	.name			= "BVME6000 NCR53c710 SCSI",
31 	.proc_name		= "BVME6000",
32 	.this_id		= 7,
33 	.module			= THIS_MODULE,
34 };
35 
36 static struct platform_device *bvme6000_scsi_device;
37 
38 static int
bvme6000_probe(struct platform_device * dev)39 bvme6000_probe(struct platform_device *dev)
40 {
41 	struct Scsi_Host *host;
42 	struct NCR_700_Host_Parameters *hostdata;
43 
44 	if (!MACH_IS_BVME6000)
45 		goto out;
46 
47 	hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL);
48 	if (!hostdata) {
49 		printk(KERN_ERR "bvme6000-scsi: "
50 				"Failed to allocate host data\n");
51 		goto out;
52 	}
53 
54 	/* Fill in the required pieces of hostdata */
55 	hostdata->base = (void __iomem *)BVME_NCR53C710_BASE;
56 	hostdata->clock = 40;	/* XXX - depends on the CPU clock! */
57 	hostdata->chip710 = 1;
58 	hostdata->dmode_extra = DMODE_FC2;
59 	hostdata->dcntl_extra = EA_710;
60 	hostdata->ctest7_extra = CTEST7_TT1;
61 
62 	/* and register the chip */
63 	host = NCR_700_detect(&bvme6000_scsi_driver_template, hostdata,
64 			      &dev->dev);
65 	if (!host) {
66 		printk(KERN_ERR "bvme6000-scsi: No host detected; "
67 				"board configuration problem?\n");
68 		goto out_free;
69 	}
70 	host->base = BVME_NCR53C710_BASE;
71 	host->this_id = 7;
72 	host->irq = BVME_IRQ_SCSI;
73 	if (request_irq(BVME_IRQ_SCSI, NCR_700_intr, 0, "bvme6000-scsi",
74 			host)) {
75 		printk(KERN_ERR "bvme6000-scsi: request_irq failed\n");
76 		goto out_put_host;
77 	}
78 
79 	platform_set_drvdata(dev, host);
80 	scsi_scan_host(host);
81 
82 	return 0;
83 
84  out_put_host:
85 	scsi_host_put(host);
86  out_free:
87 	kfree(hostdata);
88  out:
89 	return -ENODEV;
90 }
91 
92 static int
bvme6000_device_remove(struct platform_device * dev)93 bvme6000_device_remove(struct platform_device *dev)
94 {
95 	struct Scsi_Host *host = platform_get_drvdata(dev);
96 	struct NCR_700_Host_Parameters *hostdata = shost_priv(host);
97 
98 	scsi_remove_host(host);
99 	NCR_700_release(host);
100 	kfree(hostdata);
101 	free_irq(host->irq, host);
102 
103 	return 0;
104 }
105 
106 static struct platform_driver bvme6000_scsi_driver = {
107 	.driver = {
108 		.name		= "bvme6000-scsi",
109 	},
110 	.probe		= bvme6000_probe,
111 	.remove		= bvme6000_device_remove,
112 };
113 
bvme6000_scsi_init(void)114 static int __init bvme6000_scsi_init(void)
115 {
116 	int err;
117 
118 	err = platform_driver_register(&bvme6000_scsi_driver);
119 	if (err)
120 		return err;
121 
122 	bvme6000_scsi_device = platform_device_register_simple("bvme6000-scsi",
123 							       -1, NULL, 0);
124 	if (IS_ERR(bvme6000_scsi_device)) {
125 		platform_driver_unregister(&bvme6000_scsi_driver);
126 		return PTR_ERR(bvme6000_scsi_device);
127 	}
128 
129 	return 0;
130 }
131 
bvme6000_scsi_exit(void)132 static void __exit bvme6000_scsi_exit(void)
133 {
134 	platform_device_unregister(bvme6000_scsi_device);
135 	platform_driver_unregister(&bvme6000_scsi_driver);
136 }
137 
138 module_init(bvme6000_scsi_init);
139 module_exit(bvme6000_scsi_exit);
140