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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Nano River Technologies viperboard driver
4 *
5 * This is the core driver for the viperboard. There are cell drivers
6 * available for I2C, ADC and both GPIOs. SPI is not yet supported.
7 * The drivers do not support all features the board exposes. See user
8 * manual of the viperboard.
9 *
10 * (C) 2012 by Lemonage GmbH
11 * Author: Lars Poeschel <poeschel@lemonage.de>
12 * All rights reserved.
13 */
14
15#include <linux/kernel.h>
16#include <linux/errno.h>
17#include <linux/module.h>
18#include <linux/slab.h>
19#include <linux/types.h>
20#include <linux/mutex.h>
21
22#include <linux/mfd/core.h>
23#include <linux/mfd/viperboard.h>
24
25#include <linux/usb.h>
26
27
28static const struct usb_device_id vprbrd_table[] = {
29 { USB_DEVICE(0x2058, 0x1005) }, /* Nano River Technologies */
30 { } /* Terminating entry */
31};
32
33MODULE_DEVICE_TABLE(usb, vprbrd_table);
34
35static const struct mfd_cell vprbrd_devs[] = {
36 {
37 .name = "viperboard-gpio",
38 },
39 {
40 .name = "viperboard-i2c",
41 },
42 {
43 .name = "viperboard-adc",
44 },
45};
46
47static int vprbrd_probe(struct usb_interface *interface,
48 const struct usb_device_id *id)
49{
50 struct vprbrd *vb;
51
52 u16 version = 0;
53 int pipe, ret;
54
55 /* allocate memory for our device state and initialize it */
56 vb = kzalloc(sizeof(*vb), GFP_KERNEL);
57 if (!vb)
58 return -ENOMEM;
59
60 mutex_init(&vb->lock);
61
62 vb->usb_dev = usb_get_dev(interface_to_usbdev(interface));
63
64 /* save our data pointer in this interface device */
65 usb_set_intfdata(interface, vb);
66 dev_set_drvdata(&vb->pdev.dev, vb);
67
68 /* get version information, major first, minor then */
69 pipe = usb_rcvctrlpipe(vb->usb_dev, 0);
70 ret = usb_control_msg(vb->usb_dev, pipe, VPRBRD_USB_REQUEST_MAJOR,
71 VPRBRD_USB_TYPE_IN, 0x0000, 0x0000, vb->buf, 1,
72 VPRBRD_USB_TIMEOUT_MS);
73 if (ret == 1)
74 version = vb->buf[0];
75
76 ret = usb_control_msg(vb->usb_dev, pipe, VPRBRD_USB_REQUEST_MINOR,
77 VPRBRD_USB_TYPE_IN, 0x0000, 0x0000, vb->buf, 1,
78 VPRBRD_USB_TIMEOUT_MS);
79 if (ret == 1) {
80 version <<= 8;
81 version = version | vb->buf[0];
82 }
83
84 dev_info(&interface->dev,
85 "version %x.%02x found at bus %03d address %03d\n",
86 version >> 8, version & 0xff,
87 vb->usb_dev->bus->busnum, vb->usb_dev->devnum);
88
89 ret = mfd_add_hotplug_devices(&interface->dev, vprbrd_devs,
90 ARRAY_SIZE(vprbrd_devs));
91 if (ret != 0) {
92 dev_err(&interface->dev, "Failed to add mfd devices to core.");
93 goto error;
94 }
95
96 return 0;
97
98error:
99 if (vb) {
100 usb_put_dev(vb->usb_dev);
101 kfree(vb);
102 }
103
104 return ret;
105}
106
107static void vprbrd_disconnect(struct usb_interface *interface)
108{
109 struct vprbrd *vb = usb_get_intfdata(interface);
110
111 mfd_remove_devices(&interface->dev);
112 usb_set_intfdata(interface, NULL);
113 usb_put_dev(vb->usb_dev);
114 kfree(vb);
115
116 dev_dbg(&interface->dev, "disconnected\n");
117}
118
119static struct usb_driver vprbrd_driver = {
120 .name = "viperboard",
121 .probe = vprbrd_probe,
122 .disconnect = vprbrd_disconnect,
123 .id_table = vprbrd_table,
124};
125
126module_usb_driver(vprbrd_driver);
127
128MODULE_DESCRIPTION("Nano River Technologies viperboard mfd core driver");
129MODULE_AUTHOR("Lars Poeschel <poeschel@lemonage.de>");
130MODULE_LICENSE("GPL");
1/*
2 * Nano River Technologies viperboard driver
3 *
4 * This is the core driver for the viperboard. There are cell drivers
5 * available for I2C, ADC and both GPIOs. SPI is not yet supported.
6 * The drivers do not support all features the board exposes. See user
7 * manual of the viperboard.
8 *
9 * (C) 2012 by Lemonage GmbH
10 * Author: Lars Poeschel <poeschel@lemonage.de>
11 * All rights reserved.
12 *
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
17 *
18 */
19
20#include <linux/kernel.h>
21#include <linux/errno.h>
22#include <linux/module.h>
23#include <linux/slab.h>
24#include <linux/types.h>
25#include <linux/mutex.h>
26
27#include <linux/mfd/core.h>
28#include <linux/mfd/viperboard.h>
29
30#include <linux/usb.h>
31
32
33static const struct usb_device_id vprbrd_table[] = {
34 { USB_DEVICE(0x2058, 0x1005) }, /* Nano River Technologies */
35 { } /* Terminating entry */
36};
37
38MODULE_DEVICE_TABLE(usb, vprbrd_table);
39
40static const struct mfd_cell vprbrd_devs[] = {
41 {
42 .name = "viperboard-gpio",
43 },
44 {
45 .name = "viperboard-i2c",
46 },
47 {
48 .name = "viperboard-adc",
49 },
50};
51
52static int vprbrd_probe(struct usb_interface *interface,
53 const struct usb_device_id *id)
54{
55 struct vprbrd *vb;
56
57 u16 version = 0;
58 int pipe, ret;
59
60 /* allocate memory for our device state and initialize it */
61 vb = kzalloc(sizeof(*vb), GFP_KERNEL);
62 if (vb == NULL) {
63 dev_err(&interface->dev, "Out of memory\n");
64 return -ENOMEM;
65 }
66
67 mutex_init(&vb->lock);
68
69 vb->usb_dev = usb_get_dev(interface_to_usbdev(interface));
70
71 /* save our data pointer in this interface device */
72 usb_set_intfdata(interface, vb);
73 dev_set_drvdata(&vb->pdev.dev, vb);
74
75 /* get version information, major first, minor then */
76 pipe = usb_rcvctrlpipe(vb->usb_dev, 0);
77 ret = usb_control_msg(vb->usb_dev, pipe, VPRBRD_USB_REQUEST_MAJOR,
78 VPRBRD_USB_TYPE_IN, 0x0000, 0x0000, vb->buf, 1,
79 VPRBRD_USB_TIMEOUT_MS);
80 if (ret == 1)
81 version = vb->buf[0];
82
83 ret = usb_control_msg(vb->usb_dev, pipe, VPRBRD_USB_REQUEST_MINOR,
84 VPRBRD_USB_TYPE_IN, 0x0000, 0x0000, vb->buf, 1,
85 VPRBRD_USB_TIMEOUT_MS);
86 if (ret == 1) {
87 version <<= 8;
88 version = version | vb->buf[0];
89 }
90
91 dev_info(&interface->dev,
92 "version %x.%02x found at bus %03d address %03d\n",
93 version >> 8, version & 0xff,
94 vb->usb_dev->bus->busnum, vb->usb_dev->devnum);
95
96 ret = mfd_add_devices(&interface->dev, -1, vprbrd_devs,
97 ARRAY_SIZE(vprbrd_devs), NULL, 0, NULL);
98 if (ret != 0) {
99 dev_err(&interface->dev, "Failed to add mfd devices to core.");
100 goto error;
101 }
102
103 return 0;
104
105error:
106 if (vb) {
107 usb_put_dev(vb->usb_dev);
108 kfree(vb);
109 }
110
111 return ret;
112}
113
114static void vprbrd_disconnect(struct usb_interface *interface)
115{
116 struct vprbrd *vb = usb_get_intfdata(interface);
117
118 mfd_remove_devices(&interface->dev);
119 usb_set_intfdata(interface, NULL);
120 usb_put_dev(vb->usb_dev);
121 kfree(vb);
122
123 dev_dbg(&interface->dev, "disconnected\n");
124}
125
126static struct usb_driver vprbrd_driver = {
127 .name = "viperboard",
128 .probe = vprbrd_probe,
129 .disconnect = vprbrd_disconnect,
130 .id_table = vprbrd_table,
131};
132
133module_usb_driver(vprbrd_driver);
134
135MODULE_DESCRIPTION("Nano River Technologies viperboard mfd core driver");
136MODULE_AUTHOR("Lars Poeschel <poeschel@lemonage.de>");
137MODULE_LICENSE("GPL");