1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * m68k beeper driver for Linux |
4 | * |
5 | * Copyright (c) 2002 Richard Zidlicky |
6 | * Copyright (c) 2002 Vojtech Pavlik |
7 | * Copyright (c) 1992 Orest Zborowski |
8 | */ |
9 | |
10 | |
11 | #include <linux/kernel.h> |
12 | #include <linux/module.h> |
13 | #include <linux/init.h> |
14 | #include <linux/input.h> |
15 | #include <linux/platform_device.h> |
16 | #include <asm/machdep.h> |
17 | #include <asm/io.h> |
18 | |
19 | MODULE_AUTHOR("Richard Zidlicky <rz@linux-m68k.org>" ); |
20 | MODULE_DESCRIPTION("m68k beeper driver" ); |
21 | MODULE_LICENSE("GPL" ); |
22 | |
23 | static struct platform_device *m68kspkr_platform_device; |
24 | |
25 | static int m68kspkr_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) |
26 | { |
27 | unsigned int count = 0; |
28 | |
29 | if (type != EV_SND) |
30 | return -1; |
31 | |
32 | switch (code) { |
33 | case SND_BELL: if (value) value = 1000; |
34 | case SND_TONE: break; |
35 | default: return -1; |
36 | } |
37 | |
38 | if (value > 20 && value < 32767) |
39 | count = 1193182 / value; |
40 | |
41 | mach_beep(count, -1); |
42 | |
43 | return 0; |
44 | } |
45 | |
46 | static int m68kspkr_probe(struct platform_device *dev) |
47 | { |
48 | struct input_dev *input_dev; |
49 | int err; |
50 | |
51 | input_dev = input_allocate_device(); |
52 | if (!input_dev) |
53 | return -ENOMEM; |
54 | |
55 | input_dev->name = "m68k beeper" ; |
56 | input_dev->phys = "m68k/generic" ; |
57 | input_dev->id.bustype = BUS_HOST; |
58 | input_dev->id.vendor = 0x001f; |
59 | input_dev->id.product = 0x0001; |
60 | input_dev->id.version = 0x0100; |
61 | input_dev->dev.parent = &dev->dev; |
62 | |
63 | input_dev->evbit[0] = BIT_MASK(EV_SND); |
64 | input_dev->sndbit[0] = BIT_MASK(SND_BELL) | BIT_MASK(SND_TONE); |
65 | input_dev->event = m68kspkr_event; |
66 | |
67 | err = input_register_device(input_dev); |
68 | if (err) { |
69 | input_free_device(dev: input_dev); |
70 | return err; |
71 | } |
72 | |
73 | platform_set_drvdata(pdev: dev, data: input_dev); |
74 | |
75 | return 0; |
76 | } |
77 | |
78 | static int m68kspkr_remove(struct platform_device *dev) |
79 | { |
80 | struct input_dev *input_dev = platform_get_drvdata(pdev: dev); |
81 | |
82 | input_unregister_device(input_dev); |
83 | /* turn off the speaker */ |
84 | m68kspkr_event(NULL, EV_SND, SND_BELL, value: 0); |
85 | |
86 | return 0; |
87 | } |
88 | |
89 | static void m68kspkr_shutdown(struct platform_device *dev) |
90 | { |
91 | /* turn off the speaker */ |
92 | m68kspkr_event(NULL, EV_SND, SND_BELL, value: 0); |
93 | } |
94 | |
95 | static struct platform_driver m68kspkr_platform_driver = { |
96 | .driver = { |
97 | .name = "m68kspkr" , |
98 | }, |
99 | .probe = m68kspkr_probe, |
100 | .remove = m68kspkr_remove, |
101 | .shutdown = m68kspkr_shutdown, |
102 | }; |
103 | |
104 | static int __init m68kspkr_init(void) |
105 | { |
106 | int err; |
107 | |
108 | if (!mach_beep) { |
109 | printk(KERN_INFO "m68kspkr: no lowlevel beep support\n" ); |
110 | return -ENODEV; |
111 | } |
112 | |
113 | err = platform_driver_register(&m68kspkr_platform_driver); |
114 | if (err) |
115 | return err; |
116 | |
117 | m68kspkr_platform_device = platform_device_alloc(name: "m68kspkr" , id: -1); |
118 | if (!m68kspkr_platform_device) { |
119 | err = -ENOMEM; |
120 | goto err_unregister_driver; |
121 | } |
122 | |
123 | err = platform_device_add(pdev: m68kspkr_platform_device); |
124 | if (err) |
125 | goto err_free_device; |
126 | |
127 | return 0; |
128 | |
129 | err_free_device: |
130 | platform_device_put(pdev: m68kspkr_platform_device); |
131 | err_unregister_driver: |
132 | platform_driver_unregister(&m68kspkr_platform_driver); |
133 | |
134 | return err; |
135 | } |
136 | |
137 | static void __exit m68kspkr_exit(void) |
138 | { |
139 | platform_device_unregister(m68kspkr_platform_device); |
140 | platform_driver_unregister(&m68kspkr_platform_driver); |
141 | } |
142 | |
143 | module_init(m68kspkr_init); |
144 | module_exit(m68kspkr_exit); |
145 | |