[linux.git] / drivers / usb / serial / navman.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Navman Serial USB driver
 *
 * Copyright (C) 2006 Greg Kroah-Hartman <[email protected]>
 *
 * TODO:
 *	Add termios method that uses copy_hw but also kills all echo
 *	flags as the navman is rx only so cannot echo.
 */

#include <linux/gfp.h>
#include <linux/kernel.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/module.h>
#include <linux/usb.h>
#include <linux/usb/serial.h>

static const struct usb_device_id id_table[] = {
	{ USB_DEVICE(0x0a99, 0x0001) },	/* Talon Technology device */
	{ USB_DEVICE(0x0df7, 0x0900) },	/* Mobile Action i-gotU */
	{ },
};
MODULE_DEVICE_TABLE(usb, id_table);

static void navman_read_int_callback(struct urb *urb)
{
	struct usb_serial_port *port = urb->context;
	unsigned char *data = urb->transfer_buffer;
	int status = urb->status;
	int result;

	switch (status) {
	case 0:
		/* success */
		break;
	case -ECONNRESET:
	case -ENOENT:
	case -ESHUTDOWN:
		/* this urb is terminated, clean up */
		dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
			__func__, status);
		return;
	default:
		dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
			__func__, status);
		goto exit;
	}

	usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);

	if (urb->actual_length) {
		tty_insert_flip_string(&port->port, data, urb->actual_length);
		tty_flip_buffer_push(&port->port);
	}

exit:
	result = usb_submit_urb(urb, GFP_ATOMIC);
	if (result)
		dev_err(&urb->dev->dev,
			"%s - Error %d submitting interrupt urb\n",
			__func__, result);
}

static int navman_open(struct tty_struct *tty, struct usb_serial_port *port)
{
	int result = 0;

	if (port->interrupt_in_urb) {
		dev_dbg(&port->dev, "%s - adding interrupt input for treo\n",
			__func__);
		result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
		if (result)
			dev_err(&port->dev,
				"%s - failed submitting interrupt urb, error %d\n",
				__func__, result);
	}
	return result;
}

static void navman_close(struct usb_serial_port *port)
{
	usb_kill_urb(port->interrupt_in_urb);
}

static int navman_write(struct tty_struct *tty, struct usb_serial_port *port,
			const unsigned char *buf, int count)
{
	/*
	 * This device can't write any data, only read from the device
	 */
	return -EOPNOTSUPP;
}

static struct usb_serial_driver navman_device = {
	.driver = {
		.owner =	THIS_MODULE,
		.name =		"navman",
	},
	.id_table =		id_table,
	.num_ports =		1,
	.open =			navman_open,
	.close = 		navman_close,
	.write = 		navman_write,
	.read_int_callback =	navman_read_int_callback,
};

static struct usb_serial_driver * const serial_drivers[] = {
	&navman_device, NULL
};

module_usb_serial_driver(serial_drivers, id_table);

MODULE_LICENSE("GPL v2");
Commit	Line	Data
5fd54ace	1	// SPDX-License-Identifier: GPL-2.0
e9a66c64 GKH	2	/*
	3	* Navman Serial USB driver
	4	*
	5	* Copyright (C) 2006 Greg Kroah-Hartman <[email protected]>
	6	*
a5b6f60c AC	7	* TODO:
	8	* Add termios method that uses copy_hw but also kills all echo
	9	* flags as the navman is rx only so cannot echo.
e9a66c64 GKH	10	*/
e9a66c64 GKH	11
5a0e3ad6	12	#include <linux/gfp.h>
e9a66c64	13	#include <linux/kernel.h>
e9a66c64 GKH	14	#include <linux/tty.h>
	15	#include <linux/tty_flip.h>
	16	#include <linux/module.h>
	17	#include <linux/usb.h>
a969888c	18	#include <linux/usb/serial.h>
e9a66c64	19
7d40d7e8	20	static const struct usb_device_id id_table[] = {
e9a66c64	21	{ USB_DEVICE(0x0a99, 0x0001) }, /* Talon Technology device */
0eee6a2b	22	{ USB_DEVICE(0x0df7, 0x0900) }, /* Mobile Action i-gotU */
e9a66c64 GKH	23	{ },
	24	};
	25	MODULE_DEVICE_TABLE(usb, id_table);
	26
7d12e780	27	static void navman_read_int_callback(struct urb *urb)
e9a66c64 GKH	28	{
	29	struct usb_serial_port *port = urb->context;
	30	unsigned char *data = urb->transfer_buffer;
9965d612	31	int status = urb->status;
e9a66c64 GKH	32	int result;
e9a66c64 GKH	33
9965d612	34	switch (status) {
e9a66c64 GKH	35	case 0:
	36	/* success */
	37	break;
	38	case -ECONNRESET:
	39	case -ENOENT:
	40	case -ESHUTDOWN:
	41	/* this urb is terminated, clean up */
00c533fd GKH	42	dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n",
00c533fd GKH	43	__func__, status);
e9a66c64 GKH	44	return;
e9a66c64 GKH	45	default:
00c533fd GKH	46	dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n",
00c533fd GKH	47	__func__, status);
e9a66c64 GKH	48	goto exit;
	49	}
	50
59d33f2f	51	usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
e9a66c64	52
2e124b4a	53	if (urb->actual_length) {
05c7cd39	54	tty_insert_flip_string(&port->port, data, urb->actual_length);
2e124b4a	55	tty_flip_buffer_push(&port->port);
e9a66c64 GKH	56	}
	57
	58	exit:
	59	result = usb_submit_urb(urb, GFP_ATOMIC);
	60	if (result)
	61	dev_err(&urb->dev->dev,
	62	"%s - Error %d submitting interrupt urb\n",
441b62c1	63	__func__, result);
e9a66c64 GKH	64	}
e9a66c64 GKH	65
a509a7e4	66	static int navman_open(struct tty_struct tty, struct usb_serial_port port)
e9a66c64 GKH	67	{
	68	int result = 0;
	69
e9a66c64	70	if (port->interrupt_in_urb) {
00c533fd GKH	71	dev_dbg(&port->dev, "%s - adding interrupt input for treo\n",
00c533fd GKH	72	__func__);
e9a66c64 GKH	73	result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
	74	if (result)
	75	dev_err(&port->dev,
	76	"%s - failed submitting interrupt urb, error %d\n",
441b62c1	77	__func__, result);
e9a66c64 GKH	78	}
	79	return result;
	80	}
	81
335f8514	82	static void navman_close(struct usb_serial_port *port)
e9a66c64	83	{
9aac10ff	84	usb_kill_urb(port->interrupt_in_urb);
e9a66c64 GKH	85	}
e9a66c64 GKH	86
95da310e	87	static int navman_write(struct tty_struct tty, struct usb_serial_port port,
e9a66c64 GKH	88	const unsigned char *buf, int count)
e9a66c64 GKH	89	{
e9a66c64 GKH	90	/*
e9a66c64 GKH	91	* This device can't write any data, only read from the device
e9a66c64	92	*/
a5b6f60c	93	return -EOPNOTSUPP;
e9a66c64 GKH	94	}
	95
	96	static struct usb_serial_driver navman_device = {
	97	.driver = {
	98	.owner = THIS_MODULE,
	99	.name = "navman",
	100	},
	101	.id_table = id_table,
e9a66c64 GKH	102	.num_ports = 1,
	103	.open = navman_open,
	104	.close = navman_close,
	105	.write = navman_write,
	106	.read_int_callback = navman_read_int_callback,
	107	};
	108
f667ddad AS	109	static struct usb_serial_driver * const serial_drivers[] = {
	110	&navman_device, NULL
	111	};
	112
68e24113	113	module_usb_serial_driver(serial_drivers, id_table);
e9a66c64	114
627cfa89	115	MODULE_LICENSE("GPL v2");