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09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
506c7bbc KJ |
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> | |
5a0e3ad6 | 16 | #include <linux/slab.h> |
506c7bbc KJ |
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 | ||
6f039790 | 38 | static int mvme16x_probe(struct platform_device *dev) |
506c7bbc KJ |
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 | ||
bbfbbbc1 | 52 | hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL); |
506c7bbc KJ |
53 | if (hostdata == NULL) { |
54 | printk(KERN_ERR "mvme16x-scsi: " | |
55 | "Failed to allocate host data\n"); | |
56 | goto out; | |
57 | } | |
506c7bbc KJ |
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 */ | |
e5779a58 GU |
68 | host = NCR_700_detect(&mvme16x_scsi_driver_template, hostdata, |
69 | &dev->dev); | |
506c7bbc KJ |
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(host->irq, NCR_700_intr, 0, "mvme16x-scsi", 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 | ||
7a192ec3 | 93 | platform_set_drvdata(dev, host); |
506c7bbc KJ |
94 | scsi_scan_host(host); |
95 | ||
96 | return 0; | |
97 | ||
98 | out_put_host: | |
99 | scsi_host_put(host); | |
100 | out_free: | |
101 | kfree(hostdata); | |
102 | out: | |
103 | return -ENODEV; | |
104 | } | |
105 | ||
6f039790 | 106 | static int mvme16x_device_remove(struct platform_device *dev) |
506c7bbc | 107 | { |
7a192ec3 | 108 | struct Scsi_Host *host = platform_get_drvdata(dev); |
506c7bbc KJ |
109 | struct NCR_700_Host_Parameters *hostdata = shost_priv(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(hostdata); | |
122 | free_irq(host->irq, host); | |
123 | ||
124 | return 0; | |
125 | } | |
126 | ||
7a192ec3 ML |
127 | static struct platform_driver mvme16x_scsi_driver = { |
128 | .driver = { | |
129 | .name = "mvme16x-scsi", | |
7a192ec3 ML |
130 | }, |
131 | .probe = mvme16x_probe, | |
6f039790 | 132 | .remove = mvme16x_device_remove, |
506c7bbc KJ |
133 | }; |
134 | ||
135 | static int __init mvme16x_scsi_init(void) | |
136 | { | |
137 | int err; | |
138 | ||
7a192ec3 | 139 | err = platform_driver_register(&mvme16x_scsi_driver); |
506c7bbc KJ |
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)) { | |
7a192ec3 | 146 | platform_driver_unregister(&mvme16x_scsi_driver); |
506c7bbc KJ |
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); | |
7a192ec3 | 156 | platform_driver_unregister(&mvme16x_scsi_driver); |
506c7bbc KJ |
157 | } |
158 | ||
159 | module_init(mvme16x_scsi_init); | |
160 | module_exit(mvme16x_scsi_exit); |