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1 | /* |
2 | * Detection routine for the NCR53c710 based MVME16x SCSI Controllers for Linux. |
3 | * |
4 | * Based on work by Alan Hourihane |
5 | * |
6 | * Rewritten to use 53c700.c by Kars de Jong <jongk@linux-m68k.org> |
7 | */ |
8 | |
9 | #include <linux/module.h> |
10 | #include <linux/blkdev.h> |
11 | #include <linux/device.h> |
12 | #include <linux/platform_device.h> |
13 | #include <linux/init.h> |
14 | #include <linux/interrupt.h> |
15 | #include <linux/slab.h> |
16 | #include <asm/mvme16xhw.h> |
17 | #include <scsi/scsi_host.h> |
18 | #include <scsi/scsi_device.h> |
19 | #include <scsi/scsi_transport.h> |
20 | #include <scsi/scsi_transport_spi.h> |
21 | |
22 | #include "53c700.h" |
23 | |
24 | MODULE_AUTHOR("Kars de Jong <jongk@linux-m68k.org>"); |
25 | MODULE_DESCRIPTION("MVME16x NCR53C710 driver"); |
26 | MODULE_LICENSE("GPL"); |
27 | |
28 | static struct scsi_host_template mvme16x_scsi_driver_template = { |
29 | .name = "MVME16x NCR53c710 SCSI", |
30 | .proc_name = "MVME16x", |
31 | .this_id = 7, |
32 | .module = THIS_MODULE, |
33 | }; |
34 | |
35 | static struct platform_device *mvme16x_scsi_device; |
36 | |
37 | static int mvme16x_probe(struct platform_device *dev) |
38 | { |
39 | struct Scsi_Host * host = NULL; |
40 | struct NCR_700_Host_Parameters *hostdata; |
41 | |
42 | if (!MACH_IS_MVME16x) |
43 | goto out; |
44 | |
45 | if (mvme16x_config & MVME16x_CONFIG_NO_SCSICHIP) { |
46 | printk(KERN_INFO "mvme16x-scsi: detection disabled, " |
47 | "SCSI chip not present\n"); |
48 | goto out; |
49 | } |
50 | |
51 | hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL); |
52 | if (hostdata == NULL) { |
53 | printk(KERN_ERR "mvme16x-scsi: " |
54 | "Failed to allocate host data\n"); |
55 | goto out; |
56 | } |
57 | |
58 | /* Fill in the required pieces of hostdata */ |
59 | hostdata->base = (void __iomem *)0xfff47000UL; |
60 | hostdata->clock = 50; /* XXX - depends on the CPU clock! */ |
61 | hostdata->chip710 = 1; |
62 | hostdata->dmode_extra = DMODE_FC2; |
63 | hostdata->dcntl_extra = EA_710; |
64 | hostdata->ctest7_extra = CTEST7_TT1; |
65 | |
66 | /* and register the chip */ |
67 | host = NCR_700_detect(&mvme16x_scsi_driver_template, hostdata, |
68 | &dev->dev); |
69 | if (!host) { |
70 | printk(KERN_ERR "mvme16x-scsi: No host detected; " |
71 | "board configuration problem?\n"); |
72 | goto out_free; |
73 | } |
74 | host->this_id = 7; |
75 | host->base = 0xfff47000UL; |
76 | host->irq = MVME16x_IRQ_SCSI; |
77 | if (request_irq(host->irq, NCR_700_intr, 0, "mvme16x-scsi", host)) { |
78 | printk(KERN_ERR "mvme16x-scsi: request_irq failed\n"); |
79 | goto out_put_host; |
80 | } |
81 | |
82 | /* Enable scsi chip ints */ |
83 | { |
84 | volatile unsigned long v; |
85 | |
86 | /* Enable scsi interrupts at level 4 in PCCchip2 */ |
87 | v = in_be32(0xfff4202c); |
88 | v = (v & ~0xff) | 0x10 | 4; |
89 | out_be32(0xfff4202c, v); |
90 | } |
91 | |
92 | platform_set_drvdata(dev, host); |
93 | scsi_scan_host(host); |
94 | |
95 | return 0; |
96 | |
97 | out_put_host: |
98 | scsi_host_put(host); |
99 | out_free: |
100 | kfree(hostdata); |
101 | out: |
102 | return -ENODEV; |
103 | } |
104 | |
105 | static int mvme16x_device_remove(struct platform_device *dev) |
106 | { |
107 | struct Scsi_Host *host = platform_get_drvdata(dev); |
108 | struct NCR_700_Host_Parameters *hostdata = shost_priv(host); |
109 | |
110 | /* Disable scsi chip ints */ |
111 | { |
112 | volatile unsigned long v; |
113 | |
114 | v = in_be32(0xfff4202c); |
115 | v &= ~0x10; |
116 | out_be32(0xfff4202c, v); |
117 | } |
118 | scsi_remove_host(host); |
119 | NCR_700_release(host); |
120 | kfree(hostdata); |
121 | free_irq(host->irq, host); |
122 | |
123 | return 0; |
124 | } |
125 | |
126 | static struct platform_driver mvme16x_scsi_driver = { |
127 | .driver = { |
128 | .name = "mvme16x-scsi", |
129 | .owner = THIS_MODULE, |
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("mvme16x-scsi", |
144 | -1, NULL, 0); |
145 | if (IS_ERR(mvme16x_scsi_device)) { |
146 | platform_driver_unregister(&mvme16x_scsi_driver); |
147 | return PTR_ERR(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 |
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