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 |
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(size: 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(irq: BVME_IRQ_SCSI, handler: NCR_700_intr, flags: 0, name: "bvme6000-scsi" , |
74 | dev: host)) { |
75 | printk(KERN_ERR "bvme6000-scsi: request_irq failed\n" ); |
76 | goto out_put_host; |
77 | } |
78 | |
79 | platform_set_drvdata(pdev: dev, data: host); |
80 | scsi_scan_host(host); |
81 | |
82 | return 0; |
83 | |
84 | out_put_host: |
85 | scsi_host_put(t: host); |
86 | out_free: |
87 | kfree(objp: hostdata); |
88 | out: |
89 | return -ENODEV; |
90 | } |
91 | |
92 | static void |
93 | bvme6000_device_remove(struct platform_device *dev) |
94 | { |
95 | struct Scsi_Host *host = platform_get_drvdata(pdev: dev); |
96 | struct NCR_700_Host_Parameters *hostdata = shost_priv(shost: host); |
97 | |
98 | scsi_remove_host(host); |
99 | NCR_700_release(host); |
100 | kfree(objp: hostdata); |
101 | free_irq(host->irq, host); |
102 | } |
103 | |
104 | static struct platform_driver bvme6000_scsi_driver = { |
105 | .driver = { |
106 | .name = "bvme6000-scsi" , |
107 | }, |
108 | .probe = bvme6000_probe, |
109 | .remove_new = bvme6000_device_remove, |
110 | }; |
111 | |
112 | static int __init bvme6000_scsi_init(void) |
113 | { |
114 | int err; |
115 | |
116 | err = platform_driver_register(&bvme6000_scsi_driver); |
117 | if (err) |
118 | return err; |
119 | |
120 | bvme6000_scsi_device = platform_device_register_simple(name: "bvme6000-scsi" , |
121 | id: -1, NULL, num: 0); |
122 | if (IS_ERR(ptr: bvme6000_scsi_device)) { |
123 | platform_driver_unregister(&bvme6000_scsi_driver); |
124 | return PTR_ERR(ptr: bvme6000_scsi_device); |
125 | } |
126 | |
127 | return 0; |
128 | } |
129 | |
130 | static void __exit bvme6000_scsi_exit(void) |
131 | { |
132 | platform_device_unregister(bvme6000_scsi_device); |
133 | platform_driver_unregister(&bvme6000_scsi_driver); |
134 | } |
135 | |
136 | module_init(bvme6000_scsi_init); |
137 | module_exit(bvme6000_scsi_exit); |
138 | |