1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * USB Empeg empeg-car player driver |
4 | * |
5 | * Copyright (C) 2000, 2001 |
6 | * Gary Brubaker (xavyer@ix.netcom.com) |
7 | * |
8 | * Copyright (C) 1999 - 2001 |
9 | * Greg Kroah-Hartman (greg@kroah.com) |
10 | * |
11 | * See Documentation/usb/usb-serial.rst for more information on using this |
12 | * driver |
13 | */ |
14 | |
15 | #include <linux/kernel.h> |
16 | #include <linux/errno.h> |
17 | #include <linux/slab.h> |
18 | #include <linux/tty.h> |
19 | #include <linux/tty_driver.h> |
20 | #include <linux/tty_flip.h> |
21 | #include <linux/module.h> |
22 | #include <linux/spinlock.h> |
23 | #include <linux/uaccess.h> |
24 | #include <linux/usb.h> |
25 | #include <linux/usb/serial.h> |
26 | |
27 | #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Gary Brubaker <xavyer@ix.netcom.com>" |
28 | #define DRIVER_DESC "USB Empeg Mark I/II Driver" |
29 | |
30 | #define EMPEG_VENDOR_ID 0x084f |
31 | #define EMPEG_PRODUCT_ID 0x0001 |
32 | |
33 | /* function prototypes for an empeg-car player */ |
34 | static int empeg_startup(struct usb_serial *serial); |
35 | static void empeg_init_termios(struct tty_struct *tty); |
36 | |
37 | static const struct usb_device_id id_table[] = { |
38 | { USB_DEVICE(EMPEG_VENDOR_ID, EMPEG_PRODUCT_ID) }, |
39 | { } /* Terminating entry */ |
40 | }; |
41 | |
42 | MODULE_DEVICE_TABLE(usb, id_table); |
43 | |
44 | static struct usb_serial_driver empeg_device = { |
45 | .driver = { |
46 | .owner = THIS_MODULE, |
47 | .name = "empeg" , |
48 | }, |
49 | .id_table = id_table, |
50 | .num_ports = 1, |
51 | .bulk_out_size = 256, |
52 | .throttle = usb_serial_generic_throttle, |
53 | .unthrottle = usb_serial_generic_unthrottle, |
54 | .attach = empeg_startup, |
55 | .init_termios = empeg_init_termios, |
56 | }; |
57 | |
58 | static struct usb_serial_driver * const serial_drivers[] = { |
59 | &empeg_device, NULL |
60 | }; |
61 | |
62 | static int empeg_startup(struct usb_serial *serial) |
63 | { |
64 | int r; |
65 | |
66 | if (serial->dev->actconfig->desc.bConfigurationValue != 1) { |
67 | dev_err(&serial->dev->dev, "active config #%d != 1 ??\n" , |
68 | serial->dev->actconfig->desc.bConfigurationValue); |
69 | return -ENODEV; |
70 | } |
71 | |
72 | r = usb_reset_configuration(dev: serial->dev); |
73 | |
74 | /* continue on with initialization */ |
75 | return r; |
76 | } |
77 | |
78 | static void empeg_init_termios(struct tty_struct *tty) |
79 | { |
80 | struct ktermios *termios = &tty->termios; |
81 | |
82 | /* |
83 | * The empeg-car player wants these particular tty settings. |
84 | * You could, for example, change the baud rate, however the |
85 | * player only supports 115200 (currently), so there is really |
86 | * no point in support for changes to the tty settings. |
87 | * (at least for now) |
88 | * |
89 | * The default requirements for this device are: |
90 | */ |
91 | termios->c_iflag |
92 | &= ~(IGNBRK /* disable ignore break */ |
93 | | BRKINT /* disable break causes interrupt */ |
94 | | PARMRK /* disable mark parity errors */ |
95 | | ISTRIP /* disable clear high bit of input characters */ |
96 | | INLCR /* disable translate NL to CR */ |
97 | | IGNCR /* disable ignore CR */ |
98 | | ICRNL /* disable translate CR to NL */ |
99 | | IXON); /* disable enable XON/XOFF flow control */ |
100 | |
101 | termios->c_oflag |
102 | &= ~OPOST; /* disable postprocess output characters */ |
103 | |
104 | termios->c_lflag |
105 | &= ~(ECHO /* disable echo input characters */ |
106 | | ECHONL /* disable echo new line */ |
107 | | ICANON /* disable erase, kill, werase, and rprnt special characters */ |
108 | | ISIG /* disable interrupt, quit, and suspend special characters */ |
109 | | IEXTEN); /* disable non-POSIX special characters */ |
110 | |
111 | termios->c_cflag |
112 | &= ~(CSIZE /* no size */ |
113 | | PARENB /* disable parity bit */ |
114 | | CBAUD); /* clear current baud rate */ |
115 | |
116 | termios->c_cflag |
117 | |= CS8; /* character size 8 bits */ |
118 | |
119 | tty_encode_baud_rate(tty, ibaud: 115200, obaud: 115200); |
120 | } |
121 | |
122 | module_usb_serial_driver(serial_drivers, id_table); |
123 | |
124 | MODULE_AUTHOR(DRIVER_AUTHOR); |
125 | MODULE_DESCRIPTION(DRIVER_DESC); |
126 | MODULE_LICENSE("GPL v2" ); |
127 | |