1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Detection routine for the NCR53c710 based MVME16x SCSI Controllers for Linux. |
4 | * |
5 | * Based on work by Alan Hourihane |
6 | * |
7 | * Rewritten to use 53c700.c by Kars de Jong <jongk@linux-m68k.org> |
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/mvme16xhw.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("Kars de Jong <jongk@linux-m68k.org>" ); |
26 | MODULE_DESCRIPTION("MVME16x NCR53C710 driver" ); |
27 | MODULE_LICENSE("GPL" ); |
28 | |
29 | static struct scsi_host_template mvme16x_scsi_driver_template = { |
30 | .name = "MVME16x NCR53c710 SCSI" , |
31 | .proc_name = "MVME16x" , |
32 | .this_id = 7, |
33 | .module = THIS_MODULE, |
34 | }; |
35 | |
36 | static struct platform_device *mvme16x_scsi_device; |
37 | |
38 | static int mvme16x_probe(struct platform_device *dev) |
39 | { |
40 | struct Scsi_Host * host = NULL; |
41 | struct NCR_700_Host_Parameters *hostdata; |
42 | |
43 | if (!MACH_IS_MVME16x) |
44 | goto out; |
45 | |
46 | if (mvme16x_config & MVME16x_CONFIG_NO_SCSICHIP) { |
47 | printk(KERN_INFO "mvme16x-scsi: detection disabled, " |
48 | "SCSI chip not present\n" ); |
49 | goto out; |
50 | } |
51 | |
52 | hostdata = kzalloc(size: sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL); |
53 | if (hostdata == NULL) { |
54 | printk(KERN_ERR "mvme16x-scsi: " |
55 | "Failed to allocate host data\n" ); |
56 | goto out; |
57 | } |
58 | |
59 | /* Fill in the required pieces of hostdata */ |
60 | hostdata->base = (void __iomem *)0xfff47000UL; |
61 | hostdata->clock = 50; /* XXX - depends on the CPU clock! */ |
62 | hostdata->chip710 = 1; |
63 | hostdata->dmode_extra = DMODE_FC2; |
64 | hostdata->dcntl_extra = EA_710; |
65 | hostdata->ctest7_extra = CTEST7_TT1; |
66 | |
67 | /* and register the chip */ |
68 | host = NCR_700_detect(&mvme16x_scsi_driver_template, hostdata, |
69 | &dev->dev); |
70 | if (!host) { |
71 | printk(KERN_ERR "mvme16x-scsi: No host detected; " |
72 | "board configuration problem?\n" ); |
73 | goto out_free; |
74 | } |
75 | host->this_id = 7; |
76 | host->base = 0xfff47000UL; |
77 | host->irq = MVME16x_IRQ_SCSI; |
78 | if (request_irq(irq: host->irq, handler: NCR_700_intr, flags: 0, name: "mvme16x-scsi" , dev: host)) { |
79 | printk(KERN_ERR "mvme16x-scsi: request_irq failed\n" ); |
80 | goto out_put_host; |
81 | } |
82 | |
83 | /* Enable scsi chip ints */ |
84 | { |
85 | volatile unsigned long v; |
86 | |
87 | /* Enable scsi interrupts at level 4 in PCCchip2 */ |
88 | v = in_be32(0xfff4202c); |
89 | v = (v & ~0xff) | 0x10 | 4; |
90 | out_be32(0xfff4202c, v); |
91 | } |
92 | |
93 | platform_set_drvdata(pdev: dev, data: host); |
94 | scsi_scan_host(host); |
95 | |
96 | return 0; |
97 | |
98 | out_put_host: |
99 | scsi_host_put(t: host); |
100 | out_free: |
101 | kfree(objp: hostdata); |
102 | out: |
103 | return -ENODEV; |
104 | } |
105 | |
106 | static int mvme16x_device_remove(struct platform_device *dev) |
107 | { |
108 | struct Scsi_Host *host = platform_get_drvdata(pdev: dev); |
109 | struct NCR_700_Host_Parameters *hostdata = shost_priv(shost: host); |
110 | |
111 | /* Disable scsi chip ints */ |
112 | { |
113 | volatile unsigned long v; |
114 | |
115 | v = in_be32(0xfff4202c); |
116 | v &= ~0x10; |
117 | out_be32(0xfff4202c, v); |
118 | } |
119 | scsi_remove_host(host); |
120 | NCR_700_release(host); |
121 | kfree(objp: hostdata); |
122 | free_irq(host->irq, host); |
123 | |
124 | return 0; |
125 | } |
126 | |
127 | static struct platform_driver mvme16x_scsi_driver = { |
128 | .driver = { |
129 | .name = "mvme16x-scsi" , |
130 | }, |
131 | .probe = mvme16x_probe, |
132 | .remove = mvme16x_device_remove, |
133 | }; |
134 | |
135 | static int __init mvme16x_scsi_init(void) |
136 | { |
137 | int err; |
138 | |
139 | err = platform_driver_register(&mvme16x_scsi_driver); |
140 | if (err) |
141 | return err; |
142 | |
143 | mvme16x_scsi_device = platform_device_register_simple(name: "mvme16x-scsi" , |
144 | id: -1, NULL, num: 0); |
145 | if (IS_ERR(ptr: mvme16x_scsi_device)) { |
146 | platform_driver_unregister(&mvme16x_scsi_driver); |
147 | return PTR_ERR(ptr: mvme16x_scsi_device); |
148 | } |
149 | |
150 | return 0; |
151 | } |
152 | |
153 | static void __exit mvme16x_scsi_exit(void) |
154 | { |
155 | platform_device_unregister(mvme16x_scsi_device); |
156 | platform_driver_unregister(&mvme16x_scsi_driver); |
157 | } |
158 | |
159 | module_init(mvme16x_scsi_init); |
160 | module_exit(mvme16x_scsi_exit); |
161 | |