etherlabmaster: tty/module.c@30f065ea5271 (annotated)

1565 8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	1	/******************************************************************************
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	2	*
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	3	* $Id$
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	4	*
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	5	* Copyright (C) 2006-2008 Florian Pose, Ingenieurgemeinschaft IgH
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	6	*
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	7	* This file is part of the IgH EtherCAT Master.
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	8	*
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	9	* The IgH EtherCAT Master is free software; you can redistribute it and/or
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	10	* modify it under the terms of the GNU General Public License version 2, as
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	11	* published by the Free Software Foundation.
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	12	*
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	13	* The IgH EtherCAT Master is distributed in the hope that it will be useful,
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	16	* Public License for more details.
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	17	*
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	18	* You should have received a copy of the GNU General Public License along
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	19	* with the IgH EtherCAT Master; if not, write to the Free Software
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	20	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	21	*
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	22	* ---
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	23	*
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	24	* The license mentioned above concerns the source code only. Using the
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	25	* EtherCAT technology and brand is only permitted in compliance with the
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	26	* industrial property and similar rights of Beckhoff Automation GmbH.
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	27	*
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	28	*****************************************************************************/
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	29
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	30	/** \file
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	31	* EtherCAT tty driver module.
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	32	*/
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	33
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	34	/*****************************************************************************/
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	35
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	36	#include <linux/module.h>
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	37	#include <linux/err.h>
1568 d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	38	#include <linux/tty.h>
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	39	#include <linux/tty_driver.h>
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	40	#include <linux/tty_flip.h>
1568 d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	41	#include <linux/termios.h>
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	42	#include <linux/timer.h>
1565 8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	43
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	44	#include "../master/globals.h"
1569 61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	45	#include "../include/ectty.h"
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	46
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	47	/*****************************************************************************/
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	48
1570 7a2a58107dd8 Use own PFX for printk. Florian Pose <fp@igh-essen.com> parents: 1569 diff changeset	49	#define PFX "ec_tty: "
7a2a58107dd8 Use own PFX for printk. Florian Pose <fp@igh-essen.com> parents: 1569 diff changeset	50
1569 61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	51	#define EC_TTY_MAX_DEVICES 10
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	52	#define EC_TTY_TX_BUFFER_SIZE 100
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	53	#define EC_TTY_RX_BUFFER_SIZE 100
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	54
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	55	#define EC_TTY_DEBUG 0
1569 61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	56
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	57	/*****************************************************************************/
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	58
1565 8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	59	char ec_master_version_str = EC_MASTER_VERSION; /< Version string. /
1570 7a2a58107dd8 Use own PFX for printk. Florian Pose <fp@igh-essen.com> parents: 1569 diff changeset	60	unsigned int debug_level = 0;
1565 8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	61
1569 61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	62	static struct tty_driver *tty_driver = NULL;
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	63	ec_tty_t *ttys[EC_TTY_MAX_DEVICES];
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	64	struct semaphore tty_sem;
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	65
1565 8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	66	/*****************************************************************************/
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	67
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	68	/** \cond */
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	69
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	70	MODULE_AUTHOR("Florian Pose <fp@igh-essen.com>");
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	71	MODULE_DESCRIPTION("EtherCAT TTY driver module");
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	72	MODULE_LICENSE("GPL");
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	73	MODULE_VERSION(EC_MASTER_VERSION);
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	74
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	75	module_param_named(debug_level, debug_level, uint, S_IRUGO);
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	76	MODULE_PARM_DESC(debug_level, "Debug level");
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	77
1569 61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	78	/** \endcond */
1568 d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	79
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	80	static struct ktermios ec_tty_std_termios = {
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	81	.c_iflag = ICRNL \| IXON,
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	82	.c_oflag = OPOST,
1568 d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	83	.c_cflag = B38400 \| CS8 \| CREAD \| HUPCL,
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	84	.c_lflag = ISIG \| ICANON \| ECHO \| ECHOE \| ECHOK \| ECHOCTL \| ECHOKE \| IEXTEN,
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	85	.c_cc = INIT_C_CC,
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	86	};
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	87
1569 61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	88	struct ec_tty {
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	89	int minor;
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	90	struct device *dev;
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	91
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	92	uint8_t tx_buffer[EC_TTY_TX_BUFFER_SIZE];
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	93	unsigned int tx_read_idx;
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	94	unsigned int tx_write_idx;
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	95	unsigned int wakeup;
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	96
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	97	uint8_t rx_buffer[EC_TTY_RX_BUFFER_SIZE];
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	98	unsigned int rx_read_idx;
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	99	unsigned int rx_write_idx;
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	100
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	101	struct timer_list timer;
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	102	struct tty_struct *tty;
1569 61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	103	};
1565 8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	104
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	105	static const struct tty_operations ec_tty_ops; // see below
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	106
1565 8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	107	/*****************************************************************************/
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	108
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	109	/** Module initialization.
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	110	*
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	111	* \return 0 on success, else < 0
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	112	*/
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	113	int __init ec_tty_init_module(void)
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	114	{
1569 61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	115	int i, ret = 0;
1565 8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	116
1570 7a2a58107dd8 Use own PFX for printk. Florian Pose <fp@igh-essen.com> parents: 1569 diff changeset	117	printk(KERN_INFO PFX "TTY driver %s\n", EC_MASTER_VERSION);
1565 8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	118
1569 61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	119	init_MUTEX(&tty_sem);
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	120
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	121	for (i = 0; i < EC_TTY_MAX_DEVICES; i++) {
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	122	ttys[i] = NULL;
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	123	}
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	124
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	125	tty_driver = alloc_tty_driver(EC_TTY_MAX_DEVICES);
1568 d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	126	if (!tty_driver) {
1570 7a2a58107dd8 Use own PFX for printk. Florian Pose <fp@igh-essen.com> parents: 1569 diff changeset	127	printk(KERN_ERR PFX "Failed to allocate tty driver.\n");
1568 d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	128	ret = -ENOMEM;
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	129	goto out_return;
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	130	}
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	131
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	132	tty_driver->owner = THIS_MODULE;
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	133	tty_driver->driver_name = "EtherCAT TTY";
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	134	tty_driver->name = "ttyEC";
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	135	tty_driver->major = 0;
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	136	tty_driver->minor_start = 0;
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	137	tty_driver->type = TTY_DRIVER_TYPE_SERIAL;
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	138	tty_driver->subtype = SERIAL_TYPE_NORMAL;
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	139	tty_driver->flags = TTY_DRIVER_REAL_RAW \| TTY_DRIVER_DYNAMIC_DEV;
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	140	tty_driver->init_termios = ec_tty_std_termios;
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	141	tty_driver->init_termios.c_cflag = B9600 \| CS8 \| CREAD \| HUPCL \| CLOCAL;
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	142	tty_set_operations(tty_driver, &ec_tty_ops);
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	143
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	144	ret = tty_register_driver(tty_driver);
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	145	if (ret) {
1570 7a2a58107dd8 Use own PFX for printk. Florian Pose <fp@igh-essen.com> parents: 1569 diff changeset	146	printk(KERN_ERR PFX "Failed to register tty driver.\n");
1568 d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	147	goto out_put;
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	148	}
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	149
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	150	return ret;
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	151
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	152	out_put:
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	153	put_tty_driver(tty_driver);
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	154	out_return:
1565 8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	155	return ret;
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	156	}
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	157
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	158	/*****************************************************************************/
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	159
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	160	/** Module cleanup.
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	161	*
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	162	* Clears all master instances.
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	163	*/
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	164	void __exit ec_tty_cleanup_module(void)
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	165	{
1568 d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	166	tty_unregister_driver(tty_driver);
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	167	put_tty_driver(tty_driver);
1570 7a2a58107dd8 Use own PFX for printk. Florian Pose <fp@igh-essen.com> parents: 1569 diff changeset	168	printk(KERN_INFO PFX "Module unloading.\n");
1565 8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	169	}
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	170
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	171	/*****************************************************************************/
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	172
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	173	unsigned int ec_tty_tx_size(ec_tty_t *tty)
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	174	{
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	175	unsigned int ret;
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	176
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	177	if (tty->tx_write_idx >= tty->tx_read_idx) {
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	178	ret = tty->tx_write_idx - tty->tx_read_idx;
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	179	} else {
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	180	ret = EC_TTY_TX_BUFFER_SIZE + tty->tx_write_idx - tty->tx_read_idx;
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	181	}
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	182
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	183	return ret;
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	184	}
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	185
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	186	/*****************************************************************************/
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	187
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	188	unsigned int ec_tty_tx_space(ec_tty_t *tty)
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	189	{
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	190	return EC_TTY_TX_BUFFER_SIZE - 1 - ec_tty_tx_size(tty);
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	191	}
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	192
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	193	/*****************************************************************************/
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	194
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	195	unsigned int ec_tty_rx_size(ec_tty_t *tty)
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	196	{
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	197	unsigned int ret;
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	198
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	199	if (tty->rx_write_idx >= tty->rx_read_idx) {
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	200	ret = tty->rx_write_idx - tty->rx_read_idx;
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	201	} else {
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	202	ret = EC_TTY_RX_BUFFER_SIZE + tty->rx_write_idx - tty->rx_read_idx;
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	203	}
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	204
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	205	return ret;
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	206	}
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	207
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	208	/*****************************************************************************/
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	209
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	210	unsigned int ec_tty_rx_space(ec_tty_t *tty)
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	211	{
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	212	return EC_TTY_RX_BUFFER_SIZE - 1 - ec_tty_rx_size(tty);
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	213	}
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	214
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	215	/*****************************************************************************/
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	216
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	217	void ec_tty_wakeup(unsigned long data)
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	218	{
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	219	ec_tty_t tty = (ec_tty_t ) data;
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	220	size_t to_recv;
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	221
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	222	/* Wake up any process waiting to send data */
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	223	if (tty->wakeup) {
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	224	if (tty->tty) {
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	225	#if EC_TTY_DEBUG >= 1
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	226	printk(KERN_INFO PFX "Waking up.\n");
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	227	#endif
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	228	tty_wakeup(tty->tty);
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	229	}
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	230	tty->wakeup = 0;
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	231	}
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	232
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	233	/* Push received data into TTY core. */
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	234	to_recv = ec_tty_rx_size(tty);
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	235	if (to_recv && tty->tty) {
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	236	unsigned char *cbuf;
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	237	int space = tty_prepare_flip_string(tty->tty, &cbuf, to_recv);
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	238
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	239	if (space < to_recv) {
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	240	printk(KERN_WARNING PFX "Insufficient space to_recv=%d space=%d\n",
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	241	to_recv, space);
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	242	}
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	243
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	244	if (space < 0) {
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	245	to_recv = 0;
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	246	} else {
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	247	to_recv = space;
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	248	}
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	249
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	250	if (to_recv) {
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	251	unsigned int i;
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	252
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	253	#if EC_TTY_DEBUG >= 1
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	254	printk(KERN_INFO PFX "Pushing %u bytes to TTY core.\n", to_recv);
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	255	#endif
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	256
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	257	for (i = 0; i < to_recv; i++) {
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	258	cbuf[i] = tty->rx_buffer[tty->rx_read_idx];
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	259	tty->rx_read_idx = (tty->rx_read_idx + 1) % EC_TTY_RX_BUFFER_SIZE;
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	260	}
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	261	tty_flip_buffer_push(tty->tty);
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	262	}
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	263	}
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	264
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	265	tty->timer.expires += 1;
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	266	add_timer(&tty->timer);
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	267	}
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	268
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	269	/*****************************************************************************/
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	270
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	271	int ec_tty_init(ec_tty_t *tty, int minor)
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	272	{
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	273	tty->minor = minor;
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	274	tty->tx_read_idx = 0;
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	275	tty->tx_write_idx = 0;
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	276	tty->wakeup = 0;
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	277	tty->rx_read_idx = 0;
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	278	tty->rx_write_idx = 0;
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	279	init_timer(&tty->timer);
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	280	tty->tty = NULL;
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	281
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	282	tty->dev = tty_register_device(tty_driver, tty->minor, NULL);
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	283	if (IS_ERR(tty->dev)) {
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	284	printk(KERN_ERR PFX "Failed to register tty device.\n");
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	285	return PTR_ERR(tty->dev);
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	286	}
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	287
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	288	tty->timer.function = ec_tty_wakeup;
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	289	tty->timer.data = (unsigned long) tty;
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	290	tty->timer.expires = jiffies + 10;
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	291	add_timer(&tty->timer);
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	292	return 0;
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	293	}
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	294
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	295	/*****************************************************************************/
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	296
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	297	void ec_tty_clear(ec_tty_t *tty)
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	298	{
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	299	del_timer_sync(&tty->timer);
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	300	tty_unregister_device(tty_driver, tty->minor);
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	301	}
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	302
1569 61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	303	/******************************************************************************
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	304	* Device callbacks
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	305	*****************************************************************************/
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	306
1568 d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	307	static int ec_tty_open(struct tty_struct tty, struct file file)
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	308	{
1571 88167b8589ef TTY open and close. Florian Pose <fp@igh-essen.com> parents: 1570 diff changeset	309	ec_tty_t *t;
88167b8589ef TTY open and close. Florian Pose <fp@igh-essen.com> parents: 1570 diff changeset	310	int line = tty->index;
88167b8589ef TTY open and close. Florian Pose <fp@igh-essen.com> parents: 1570 diff changeset	311
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	312	#if EC_TTY_DEBUG >= 1
1571 88167b8589ef TTY open and close. Florian Pose <fp@igh-essen.com> parents: 1570 diff changeset	313	printk(KERN_INFO PFX "Opening line %i.\n", line);
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	314	#endif
1571 88167b8589ef TTY open and close. Florian Pose <fp@igh-essen.com> parents: 1570 diff changeset	315
88167b8589ef TTY open and close. Florian Pose <fp@igh-essen.com> parents: 1570 diff changeset	316	if (line < 0 \|\| line >= EC_TTY_MAX_DEVICES) {
88167b8589ef TTY open and close. Florian Pose <fp@igh-essen.com> parents: 1570 diff changeset	317	return -ENXIO;
88167b8589ef TTY open and close. Florian Pose <fp@igh-essen.com> parents: 1570 diff changeset	318	}
88167b8589ef TTY open and close. Florian Pose <fp@igh-essen.com> parents: 1570 diff changeset	319
88167b8589ef TTY open and close. Florian Pose <fp@igh-essen.com> parents: 1570 diff changeset	320	t = ttys[line];
88167b8589ef TTY open and close. Florian Pose <fp@igh-essen.com> parents: 1570 diff changeset	321	if (!t) {
88167b8589ef TTY open and close. Florian Pose <fp@igh-essen.com> parents: 1570 diff changeset	322	return -ENXIO;
88167b8589ef TTY open and close. Florian Pose <fp@igh-essen.com> parents: 1570 diff changeset	323	}
88167b8589ef TTY open and close. Florian Pose <fp@igh-essen.com> parents: 1570 diff changeset	324
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	325	if (t->tty) {
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	326	return -EBUSY;
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	327	}
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	328
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	329	t->tty = tty;
1571 88167b8589ef TTY open and close. Florian Pose <fp@igh-essen.com> parents: 1570 diff changeset	330	tty->driver_data = t;
88167b8589ef TTY open and close. Florian Pose <fp@igh-essen.com> parents: 1570 diff changeset	331	return 0;
1568 d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	332	}
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	333
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	334	/*****************************************************************************/
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	335
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	336	static void ec_tty_close(struct tty_struct tty, struct file file)
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	337	{
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	338	ec_tty_t t = (ec_tty_t ) tty->driver_data;
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	339
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	340	#if EC_TTY_DEBUG >= 1
1571 88167b8589ef TTY open and close. Florian Pose <fp@igh-essen.com> parents: 1570 diff changeset	341	printk(KERN_INFO PFX "Closing line %i.\n", tty->index);
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	342	#endif
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	343
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	344	if (t->tty == tty) {
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	345	t->tty = NULL;
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	346	}
1568 d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	347	}
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	348
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	349	/*****************************************************************************/
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	350
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	351	static int ec_tty_write(
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	352	struct tty_struct *tty,
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	353	const unsigned char *buffer,
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	354	int count
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	355	)
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	356	{
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	357	ec_tty_t t = (ec_tty_t ) tty->driver_data;
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	358	unsigned int data_size, i;
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	359
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	360	#if EC_TTY_DEBUG >= 1
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	361	printk(KERN_INFO PFX "%s(count=%i)\n", __func__, count);
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	362	#endif
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	363
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	364	if (count <= 0) {
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	365	return 0;
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	366	}
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	367
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	368	data_size = min(ec_tty_tx_space(t), (unsigned int) count);
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	369	for (i = 0; i < data_size; i++) {
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	370	t->tx_buffer[t->tx_write_idx] = buffer[i];
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	371	t->tx_write_idx = (t->tx_write_idx + 1) % EC_TTY_TX_BUFFER_SIZE;
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	372	}
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	373
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	374	#if EC_TTY_DEBUG >= 1
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	375	printk(KERN_INFO PFX "%s(): %u bytes written.\n", __func__, data_size);
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	376	#endif
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	377	return data_size;
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	378	}
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	379
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	380	/*****************************************************************************/
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	381
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	382	static void ec_tty_put_char(struct tty_struct *tty, unsigned char ch)
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	383	{
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	384	ec_tty_t t = (ec_tty_t ) tty->driver_data;
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	385
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	386	#if EC_TTY_DEBUG >= 1
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	387	printk(KERN_INFO PFX "%s(): c=%02x.\n", __func__, (unsigned int) ch);
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	388	#endif
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	389
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	390	if (ec_tty_tx_space(t)) {
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	391	t->tx_buffer[t->tx_write_idx] = ch;
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	392	t->tx_write_idx = (t->tx_write_idx + 1) % EC_TTY_TX_BUFFER_SIZE;
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	393	} else {
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	394	printk(KERN_WARNING PFX "%s(): Dropped a byte!\n", __func__);
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	395	}
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	396	}
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	397
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	398	/*****************************************************************************/
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	399
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	400	static int ec_tty_write_room(struct tty_struct *tty)
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	401	{
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	402	ec_tty_t t = (ec_tty_t ) tty->driver_data;
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	403	int ret = ec_tty_tx_space(t);
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	404
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	405	#if EC_TTY_DEBUG >= 2
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	406	printk(KERN_INFO PFX "%s() = %i.\n", __func__, ret);
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	407	#endif
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	408
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	409	return ret;
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	410	}
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	411
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	412	/*****************************************************************************/
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	413
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	414	static int ec_tty_chars_in_buffer(struct tty_struct *tty)
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	415	{
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	416	ec_tty_t t = (ec_tty_t ) tty->driver_data;
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	417	int ret;
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	418
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	419	#if EC_TTY_DEBUG >= 2
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	420	printk(KERN_INFO PFX "%s().\n", __func__);
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	421	#endif
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	422
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	423	ret = ec_tty_tx_size(t);
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	424
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	425	#if EC_TTY_DEBUG >= 2
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	426	printk(KERN_INFO PFX "%s() = %i.\n", __func__, ret);
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	427	#endif
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	428
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	429	return ret;
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	430	}
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	431
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	432	/*****************************************************************************/
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	433
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	434	static void ec_tty_flush_buffer(struct tty_struct *tty)
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	435	{
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	436	#if EC_TTY_DEBUG >= 2
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	437	printk(KERN_INFO PFX "%s().\n", __func__);
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	438	#endif
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	439	}
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	440
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	441	/*****************************************************************************/
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	442
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	443	static int ec_tty_ioctl(struct tty_struct tty, struct file file,
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	444	unsigned int cmd, unsigned long arg)
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	445	{
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	446	#if EC_TTY_DEBUG >= 2
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	447	printk(KERN_INFO PFX "%s().\n", __func__);
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	448	#endif
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	449	return -ENOTTY;
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	450	}
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	451
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	452	/*****************************************************************************/
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	453
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	454	static void ec_tty_throttle(struct tty_struct *tty)
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	455	{
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	456	#if EC_TTY_DEBUG >= 2
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	457	printk(KERN_INFO PFX "%s().\n", __func__);
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	458	#endif
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	459	}
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	460
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	461	/*****************************************************************************/
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	462
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	463	static void ec_tty_unthrottle(struct tty_struct *tty)
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	464	{
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	465	#if EC_TTY_DEBUG >= 2
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	466	printk(KERN_INFO PFX "%s().\n", __func__);
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	467	#endif
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	468	}
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	469
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	470	/*****************************************************************************/
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	471
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	472	static void ec_tty_set_termios(struct tty_struct *tty,
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	473	struct ktermios *old_termios)
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	474	{
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	475	#if EC_TTY_DEBUG >= 2
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	476	printk(KERN_INFO PFX "%s().\n", __func__);
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	477	#endif
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	478	}
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	479
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	480	/*****************************************************************************/
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	481
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	482	static void ec_tty_stop(struct tty_struct *tty)
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	483	{
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	484	#if EC_TTY_DEBUG >= 2
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	485	printk(KERN_INFO PFX "%s().\n", __func__);
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	486	#endif
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	487	}
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	488
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	489	/*****************************************************************************/
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	490
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	491	static void ec_tty_start(struct tty_struct *tty)
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	492	{
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	493	#if EC_TTY_DEBUG >= 2
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	494	printk(KERN_INFO PFX "%s().\n", __func__);
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	495	#endif
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	496	}
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	497
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	498	/*****************************************************************************/
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	499
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	500	static void ec_tty_hangup(struct tty_struct *tty)
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	501	{
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	502	#if EC_TTY_DEBUG >= 2
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	503	printk(KERN_INFO PFX "%s().\n", __func__);
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	504	#endif
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	505	}
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	506
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	507	/*****************************************************************************/
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	508
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	509	static void ec_tty_break(struct tty_struct *tty, int break_state)
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	510	{
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	511	#if EC_TTY_DEBUG >= 2
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	512	printk(KERN_INFO PFX "%s(break_state = %i).\n", __func__, break_state);
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	513	#endif
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	514	}
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	515
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	516	/*****************************************************************************/
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	517
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	518	static void ec_tty_send_xchar(struct tty_struct *tty, char ch)
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	519	{
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	520	#if EC_TTY_DEBUG >= 2
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	521	printk(KERN_INFO PFX "%s(ch=%02x).\n", __func__, (unsigned int) ch);
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	522	#endif
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	523	}
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	524
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	525	/*****************************************************************************/
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	526
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	527	static void ec_tty_wait_until_sent(struct tty_struct *tty, int timeout)
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	528	{
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	529	#if EC_TTY_DEBUG >= 2
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	530	printk(KERN_INFO PFX "%s(timeout=%i).\n", __func__, timeout);
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	531	#endif
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	532	}
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	533
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	534	/*****************************************************************************/
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	535
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	536	static int ec_tty_tiocmget(struct tty_struct tty, struct file file)
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	537	{
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	538	#if EC_TTY_DEBUG >= 2
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	539	printk(KERN_INFO PFX "%s().\n", __func__);
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	540	#endif
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	541	return -EBUSY;
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	542	}
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	543
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	544	/*****************************************************************************/
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	545
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	546	static int ec_tty_tiocmset(struct tty_struct tty, struct file file,
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	547	unsigned int set, unsigned int clear)
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	548	{
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	549	#if EC_TTY_DEBUG >= 2
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	550	printk(KERN_INFO PFX "%s(set=%u, clear=%u).\n", __func__, set, clear);
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	551	#endif
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	552	return -EBUSY;
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	553	}
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	554
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	555	/*****************************************************************************/
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	556
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	557	static const struct tty_operations ec_tty_ops = {
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	558	.open = ec_tty_open,
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	559	.close = ec_tty_close,
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	560	.write = ec_tty_write,
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	561	.put_char = ec_tty_put_char,
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	562	.write_room = ec_tty_write_room,
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	563	.chars_in_buffer = ec_tty_chars_in_buffer,
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	564	.flush_buffer = ec_tty_flush_buffer,
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	565	.ioctl = ec_tty_ioctl,
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	566	.throttle = ec_tty_throttle,
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	567	.unthrottle = ec_tty_unthrottle,
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	568	.set_termios = ec_tty_set_termios,
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	569	.stop = ec_tty_stop,
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	570	.start = ec_tty_start,
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	571	.hangup = ec_tty_hangup,
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	572	.break_ctl = ec_tty_break,
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	573	.send_xchar = ec_tty_send_xchar,
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	574	.wait_until_sent = ec_tty_wait_until_sent,
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	575	.tiocmget = ec_tty_tiocmget,
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	576	.tiocmset = ec_tty_tiocmset,
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	577	};
1568 d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	578
1569 61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	579	/******************************************************************************
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	580	* Public functions and methods
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	581	*****************************************************************************/
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	582
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	583	ec_tty_t *ectty_create(void)
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	584	{
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	585	ec_tty_t *tty;
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	586	int minor, ret;
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	587
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	588	if (down_interruptible(&tty_sem)) {
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	589	return ERR_PTR(-EINTR);
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	590	}
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	591
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	592	for (minor = 0; minor < EC_TTY_MAX_DEVICES; minor++) {
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	593	if (!ttys[minor]) {
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	594	printk(KERN_INFO PFX "Creating TTY interface %i.\n", minor);
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	595
1569 61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	596	tty = kmalloc(sizeof(ec_tty_t), GFP_KERNEL);
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	597	if (!tty) {
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	598	up(&tty_sem);
1570 7a2a58107dd8 Use own PFX for printk. Florian Pose <fp@igh-essen.com> parents: 1569 diff changeset	599	printk(KERN_ERR PFX "Failed to allocate memory.\n");
1569 61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	600	return ERR_PTR(-ENOMEM);
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	601	}
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	602
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	603	ret = ec_tty_init(tty, minor);
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	604	if (ret) {
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	605	up(&tty_sem);
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	606	kfree(tty);
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	607	return ERR_PTR(ret);
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	608	}
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	609
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	610	ttys[minor] = tty;
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	611	up(&tty_sem);
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	612	return tty;
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	613	}
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	614	}
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	615
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	616	up(&tty_sem);
1570 7a2a58107dd8 Use own PFX for printk. Florian Pose <fp@igh-essen.com> parents: 1569 diff changeset	617	printk(KERN_ERR PFX "No free interfaces avaliable.\n");
1569 61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	618	return ERR_PTR(-EBUSY);
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	619	}
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	620
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	621	/*****************************************************************************/
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	622
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	623	void ectty_free(ec_tty_t *tty)
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	624	{
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	625	printk(KERN_INFO PFX "Freeing TTY interface %i.\n", tty->minor);
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	626
1569 61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	627	ec_tty_clear(tty);
1570 7a2a58107dd8 Use own PFX for printk. Florian Pose <fp@igh-essen.com> parents: 1569 diff changeset	628	ttys[tty->minor] = NULL;
1569 61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	629	kfree(tty);
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	630	}
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	631
1568 d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	632	/*****************************************************************************/
d9bbbe1883ab Register a TTY driver with one device. Florian Pose <fp@igh-essen.com> parents: 1565 diff changeset	633
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	634	unsigned int ectty_tx_data(ec_tty_t tty, uint8_t buffer, size_t size)
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	635	{
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	636	unsigned int data_size = min(ec_tty_tx_size(tty), size), i;
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	637
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	638	if (data_size) {
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	639	#if EC_TTY_DEBUG >= 1
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	640	printk(KERN_INFO PFX "Fetching %u bytes to send.\n", data_size);
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	641	#endif
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	642	}
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	643
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	644	for (i = 0; i < data_size; i++) {
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	645	buffer[i] = tty->tx_buffer[tty->tx_read_idx];
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	646	tty->tx_read_idx = (tty->tx_read_idx + 1) % EC_TTY_TX_BUFFER_SIZE;
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	647	}
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	648
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	649	if (data_size) {
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	650	tty->wakeup = 1;
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	651	}
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	652
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	653	return data_size;
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	654	}
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	655
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	656	/*****************************************************************************/
17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	657
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	658	void ectty_rx_data(ec_tty_t tty, const uint8_t buffer, size_t size)
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	659	{
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	660	size_t to_recv;
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	661
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	662	if (size) {
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	663	unsigned int i;
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	664
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	665	#if EC_TTY_DEBUG >= 1
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	666	printk(KERN_INFO PFX "Received %u bytes.\n", size);
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	667	#endif
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	668
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	669	to_recv = min(ec_tty_rx_space(tty), size);
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	670
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	671	if (to_recv < size) {
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	672	printk(KERN_WARNING PFX "Dropping %u bytes.\n", size - to_recv);
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	673	}
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	674
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	675	for (i = 0; i < size; i++) {
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	676	tty->rx_buffer[tty->rx_write_idx] = buffer[i];
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	677	tty->rx_write_idx = (tty->rx_write_idx + 1) % EC_TTY_RX_BUFFER_SIZE;
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	678	}
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	679	}
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	680	}
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	681
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	682	/*****************************************************************************/
fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	683
1565 8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	684	/** \cond */
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	685
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	686	module_init(ec_tty_init_module);
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	687	module_exit(ec_tty_cleanup_module);
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	688
1569 61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	689	EXPORT_SYMBOL(ectty_create);
61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	690	EXPORT_SYMBOL(ectty_free);
1575 17598f2332b6 Send direction works! Florian Pose <fp@igh-essen.com> parents: 1572 diff changeset	691	EXPORT_SYMBOL(ectty_tx_data);
1577 fa3f66b783c1 Implemented reading direction of tty driver. Florian Pose <fp@igh-essen.com> parents: 1575 diff changeset	692	EXPORT_SYMBOL(ectty_rx_data);
1569 61f5f4c35883 Interface management. Florian Pose <fp@igh-essen.com> parents: 1568 diff changeset	693
1565 8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	694	/** \endcond */
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	695
8c526cfe1399 Base files for new TTY driver. Florian Pose <fp@igh-essen.com> parents: diff changeset	696	/*****************************************************************************/

author	Florian Pose <fp@igh-essen.com>
	Wed, 09 Dec 2009 14:40:35 +0100
changeset 1578	30f065ea5271
parent 1577	fa3f66b783c1
child 1595	8d8657654921
permissions	-rw-r--r--