| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | /* |
| 3 | * PlayStation 2 Trance Vibrator driver |
| 4 | * |
| 5 | * Copyright (C) 2006 Sam Hocevar <sam@zoy.org> |
| 6 | */ |
| 7 | |
| 8 | /* Standard include files */ |
| 9 | #include <linux/kernel.h> |
| 10 | #include <linux/errno.h> |
| 11 | #include <linux/slab.h> |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/usb.h> |
| 14 | |
| 15 | #define DRIVER_AUTHOR "Sam Hocevar, sam@zoy.org" |
| 16 | #define DRIVER_DESC "PlayStation 2 Trance Vibrator driver" |
| 17 | |
| 18 | #define TRANCEVIBRATOR_VENDOR_ID 0x0b49 /* ASCII Corporation */ |
| 19 | #define TRANCEVIBRATOR_PRODUCT_ID 0x064f /* Trance Vibrator */ |
| 20 | |
| 21 | static const struct usb_device_id id_table[] = { |
| 22 | { USB_DEVICE(TRANCEVIBRATOR_VENDOR_ID, TRANCEVIBRATOR_PRODUCT_ID) }, |
| 23 | { }, |
| 24 | }; |
| 25 | MODULE_DEVICE_TABLE (usb, id_table); |
| 26 | |
| 27 | /* Driver-local specific stuff */ |
| 28 | struct trancevibrator { |
| 29 | struct usb_device *udev; |
| 30 | unsigned int speed; |
| 31 | }; |
| 32 | |
| 33 | static ssize_t speed_show(struct device *dev, struct device_attribute *attr, |
| 34 | char *buf) |
| 35 | { |
| 36 | struct usb_interface *intf = to_usb_interface(dev); |
| 37 | struct trancevibrator *tv = usb_get_intfdata(intf); |
| 38 | |
| 39 | return sprintf(buf, "%d\n", tv->speed); |
| 40 | } |
| 41 | |
| 42 | static ssize_t speed_store(struct device *dev, struct device_attribute *attr, |
| 43 | const char *buf, size_t count) |
| 44 | { |
| 45 | struct usb_interface *intf = to_usb_interface(dev); |
| 46 | struct trancevibrator *tv = usb_get_intfdata(intf); |
| 47 | int temp, retval, old; |
| 48 | |
| 49 | temp = simple_strtoul(buf, NULL, 10); |
| 50 | if (temp > 255) |
| 51 | temp = 255; |
| 52 | else if (temp < 0) |
| 53 | temp = 0; |
| 54 | old = tv->speed; |
| 55 | tv->speed = temp; |
| 56 | |
| 57 | dev_dbg(&tv->udev->dev, "speed = %d\n", tv->speed); |
| 58 | |
| 59 | /* Set speed */ |
| 60 | retval = usb_control_msg(tv->udev, usb_sndctrlpipe(tv->udev, 0), |
| 61 | 0x01, /* vendor request: set speed */ |
| 62 | USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_OTHER, |
| 63 | tv->speed, /* speed value */ |
| 64 | 0, NULL, 0, USB_CTRL_GET_TIMEOUT); |
| 65 | if (retval) { |
| 66 | tv->speed = old; |
| 67 | dev_dbg(&tv->udev->dev, "retval = %d\n", retval); |
| 68 | return retval; |
| 69 | } |
| 70 | return count; |
| 71 | } |
| 72 | |
| 73 | static DEVICE_ATTR_RW(speed); |
| 74 | |
| 75 | static int tv_probe(struct usb_interface *interface, |
| 76 | const struct usb_device_id *id) |
| 77 | { |
| 78 | struct usb_device *udev = interface_to_usbdev(interface); |
| 79 | struct trancevibrator *dev; |
| 80 | int retval; |
| 81 | |
| 82 | dev = kzalloc(sizeof(struct trancevibrator), GFP_KERNEL); |
| 83 | if (!dev) { |
| 84 | retval = -ENOMEM; |
| 85 | goto error; |
| 86 | } |
| 87 | |
| 88 | dev->udev = usb_get_dev(udev); |
| 89 | usb_set_intfdata(interface, dev); |
| 90 | retval = device_create_file(&interface->dev, &dev_attr_speed); |
| 91 | if (retval) |
| 92 | goto error_create_file; |
| 93 | |
| 94 | return 0; |
| 95 | |
| 96 | error_create_file: |
| 97 | usb_put_dev(udev); |
| 98 | usb_set_intfdata(interface, NULL); |
| 99 | error: |
| 100 | kfree(dev); |
| 101 | return retval; |
| 102 | } |
| 103 | |
| 104 | static void tv_disconnect(struct usb_interface *interface) |
| 105 | { |
| 106 | struct trancevibrator *dev; |
| 107 | |
| 108 | dev = usb_get_intfdata (interface); |
| 109 | device_remove_file(&interface->dev, &dev_attr_speed); |
| 110 | usb_set_intfdata(interface, NULL); |
| 111 | usb_put_dev(dev->udev); |
| 112 | kfree(dev); |
| 113 | } |
| 114 | |
| 115 | /* USB subsystem object */ |
| 116 | static struct usb_driver tv_driver = { |
| 117 | .name = "trancevibrator", |
| 118 | .probe = tv_probe, |
| 119 | .disconnect = tv_disconnect, |
| 120 | .id_table = id_table, |
| 121 | }; |
| 122 | |
| 123 | module_usb_driver(tv_driver); |
| 124 | |
| 125 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 126 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 127 | MODULE_LICENSE("GPL"); |