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1 | /*************************************************************************** |
2 | * Copyright (C) 2010-2012 by Bruno Prémont <bonbons@linux-vserver.org> * | |
3 | * * | |
4 | * Based on Logitech G13 driver (v0.4) * | |
5 | * Copyright (C) 2009 by Rick L. Vinyard, Jr. <rvinyard@cs.nmsu.edu> * | |
6 | * * | |
7 | * This program is free software: you can redistribute it and/or modify * | |
8 | * it under the terms of the GNU General Public License as published by * | |
9 | * the Free Software Foundation, version 2 of the License. * | |
10 | * * | |
11 | * This driver is distributed in the hope that it will be useful, but * | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of * | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * | |
14 | * General Public License for more details. * | |
15 | * * | |
16 | * You should have received a copy of the GNU General Public License * | |
17 | * along with this software. If not see <http://www.gnu.org/licenses/>. * | |
18 | ***************************************************************************/ | |
19 | ||
20 | #include <linux/hid.h> | |
21 | #include <linux/hid-debug.h> | |
22 | #include <linux/input.h> | |
23 | #include "hid-ids.h" | |
24 | #include "usbhid/usbhid.h" | |
25 | #include <linux/usb.h> | |
26 | ||
27 | #include <linux/fb.h> | |
28 | #include <linux/vmalloc.h> | |
29 | #include <linux/backlight.h> | |
30 | #include <linux/lcd.h> | |
31 | ||
32 | #include <linux/leds.h> | |
33 | ||
34 | #include <linux/seq_file.h> | |
35 | #include <linux/debugfs.h> | |
36 | ||
37 | #include <linux/completion.h> | |
38 | #include <linux/uaccess.h> | |
39 | #include <linux/module.h> | |
40 | ||
41 | #include "hid-picolcd.h" | |
42 | ||
43 | ||
44 | void picolcd_leds_set(struct picolcd_data *data) | |
45 | { | |
46 | struct hid_report *report; | |
47 | unsigned long flags; | |
48 | ||
49 | if (!data->led[0]) | |
50 | return; | |
51 | report = picolcd_out_report(REPORT_LED_STATE, data->hdev); | |
52 | if (!report || report->maxfield != 1 || report->field[0]->report_count != 1) | |
53 | return; | |
54 | ||
55 | spin_lock_irqsave(&data->lock, flags); | |
56 | hid_set_field(report->field[0], 0, data->led_state); | |
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57 | if (!(data->status & PICOLCD_FAILED)) |
58 | usbhid_submit_report(data->hdev, report, USB_DIR_OUT); | |
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59 | spin_unlock_irqrestore(&data->lock, flags); |
60 | } | |
61 | ||
62 | static void picolcd_led_set_brightness(struct led_classdev *led_cdev, | |
63 | enum led_brightness value) | |
64 | { | |
65 | struct device *dev; | |
66 | struct hid_device *hdev; | |
67 | struct picolcd_data *data; | |
68 | int i, state = 0; | |
69 | ||
70 | dev = led_cdev->dev->parent; | |
71 | hdev = container_of(dev, struct hid_device, dev); | |
72 | data = hid_get_drvdata(hdev); | |
b07072e6 BP |
73 | if (!data) |
74 | return; | |
fabdbf2f BP |
75 | for (i = 0; i < 8; i++) { |
76 | if (led_cdev != data->led[i]) | |
77 | continue; | |
78 | state = (data->led_state >> i) & 1; | |
79 | if (value == LED_OFF && state) { | |
80 | data->led_state &= ~(1 << i); | |
81 | picolcd_leds_set(data); | |
82 | } else if (value != LED_OFF && !state) { | |
83 | data->led_state |= 1 << i; | |
84 | picolcd_leds_set(data); | |
85 | } | |
86 | break; | |
87 | } | |
88 | } | |
89 | ||
90 | static enum led_brightness picolcd_led_get_brightness(struct led_classdev *led_cdev) | |
91 | { | |
92 | struct device *dev; | |
93 | struct hid_device *hdev; | |
94 | struct picolcd_data *data; | |
95 | int i, value = 0; | |
96 | ||
97 | dev = led_cdev->dev->parent; | |
98 | hdev = container_of(dev, struct hid_device, dev); | |
99 | data = hid_get_drvdata(hdev); | |
100 | for (i = 0; i < 8; i++) | |
101 | if (led_cdev == data->led[i]) { | |
102 | value = (data->led_state >> i) & 1; | |
103 | break; | |
104 | } | |
105 | return value ? LED_FULL : LED_OFF; | |
106 | } | |
107 | ||
108 | int picolcd_init_leds(struct picolcd_data *data, struct hid_report *report) | |
109 | { | |
110 | struct device *dev = &data->hdev->dev; | |
111 | struct led_classdev *led; | |
112 | size_t name_sz = strlen(dev_name(dev)) + 8; | |
113 | char *name; | |
114 | int i, ret = 0; | |
115 | ||
116 | if (!report) | |
117 | return -ENODEV; | |
118 | if (report->maxfield != 1 || report->field[0]->report_count != 1 || | |
119 | report->field[0]->report_size != 8) { | |
120 | dev_err(dev, "unsupported LED_STATE report"); | |
121 | return -EINVAL; | |
122 | } | |
123 | ||
124 | for (i = 0; i < 8; i++) { | |
125 | led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL); | |
126 | if (!led) { | |
127 | dev_err(dev, "can't allocate memory for LED %d\n", i); | |
128 | ret = -ENOMEM; | |
129 | goto err; | |
130 | } | |
131 | name = (void *)(&led[1]); | |
132 | snprintf(name, name_sz, "%s::GPO%d", dev_name(dev), i); | |
133 | led->name = name; | |
134 | led->brightness = 0; | |
135 | led->max_brightness = 1; | |
136 | led->brightness_get = picolcd_led_get_brightness; | |
137 | led->brightness_set = picolcd_led_set_brightness; | |
138 | ||
139 | data->led[i] = led; | |
140 | ret = led_classdev_register(dev, data->led[i]); | |
141 | if (ret) { | |
142 | data->led[i] = NULL; | |
143 | kfree(led); | |
144 | dev_err(dev, "can't register LED %d\n", i); | |
145 | goto err; | |
146 | } | |
147 | } | |
148 | return 0; | |
149 | err: | |
150 | for (i = 0; i < 8; i++) | |
151 | if (data->led[i]) { | |
152 | led = data->led[i]; | |
153 | data->led[i] = NULL; | |
154 | led_classdev_unregister(led); | |
155 | kfree(led); | |
156 | } | |
157 | return ret; | |
158 | } | |
159 | ||
160 | void picolcd_exit_leds(struct picolcd_data *data) | |
161 | { | |
162 | struct led_classdev *led; | |
163 | int i; | |
164 | ||
165 | for (i = 0; i < 8; i++) { | |
166 | led = data->led[i]; | |
167 | data->led[i] = NULL; | |
168 | if (!led) | |
169 | continue; | |
170 | led_classdev_unregister(led); | |
171 | kfree(led); | |
172 | } | |
173 | } | |
174 | ||
175 |