author | Andreas Stewering-Bone <ab@igh-essen.com> |
Thu, 03 Mar 2011 09:05:40 +0100 | |
branch | stable-1.5 |
changeset 2201 | 7aeb32a5bb6d |
parent 1975 | 8e173dddd183 |
child 2028 | 55854f070c4a |
child 2384 | b068951506d9 |
permissions | -rw-r--r-- |
1565 | 1 |
/****************************************************************************** |
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* |
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* $Id$ |
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* |
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* Copyright (C) 2006-2008 Florian Pose, Ingenieurgemeinschaft IgH |
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* |
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* This file is part of the IgH EtherCAT Master. |
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* |
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* The IgH EtherCAT Master is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License version 2, as |
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* published by the Free Software Foundation. |
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* |
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* The IgH EtherCAT Master is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
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* Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License along |
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* with the IgH EtherCAT Master; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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* |
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* --- |
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* |
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* The license mentioned above concerns the source code only. Using the |
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* EtherCAT technology and brand is only permitted in compliance with the |
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* industrial property and similar rights of Beckhoff Automation GmbH. |
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* |
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*****************************************************************************/ |
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/** \file |
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* EtherCAT tty driver module. |
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*/ |
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/*****************************************************************************/ |
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#include <linux/module.h> |
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#include <linux/err.h> |
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#include <linux/tty.h> |
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#include <linux/tty_driver.h> |
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#include <linux/tty_flip.h> |
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41 |
#include <linux/termios.h> |
1575 | 42 |
#include <linux/timer.h> |
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#include <linux/version.h> |
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#include <linux/serial.h> |
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#include <linux/uaccess.h> |
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46 |
#include <linux/slab.h> |
1565 | 47 |
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48 |
#include "../master/globals.h" |
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1569 | 49 |
#include "../include/ectty.h" |
50 |
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51 |
/*****************************************************************************/ |
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52 |
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1570 | 53 |
#define PFX "ec_tty: " |
54 |
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#define EC_TTY_MAX_DEVICES 32 |
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#define EC_TTY_TX_BUFFER_SIZE 100 |
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#define EC_TTY_RX_BUFFER_SIZE 100 |
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59 |
#define EC_TTY_DEBUG 0 |
1569 | 60 |
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61 |
/*****************************************************************************/ |
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62 |
||
1565 | 63 |
char *ec_master_version_str = EC_MASTER_VERSION; /**< Version string. */ |
1570 | 64 |
unsigned int debug_level = 0; |
1565 | 65 |
|
1569 | 66 |
static struct tty_driver *tty_driver = NULL; |
67 |
ec_tty_t *ttys[EC_TTY_MAX_DEVICES]; |
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struct semaphore tty_sem; |
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1786 | 70 |
void ec_tty_wakeup(unsigned long); |
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1565 | 72 |
/*****************************************************************************/ |
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/** \cond */ |
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76 |
MODULE_AUTHOR("Florian Pose <fp@igh-essen.com>"); |
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MODULE_DESCRIPTION("EtherCAT TTY driver module"); |
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MODULE_LICENSE("GPL"); |
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MODULE_VERSION(EC_MASTER_VERSION); |
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81 |
module_param_named(debug_level, debug_level, uint, S_IRUGO); |
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82 |
MODULE_PARM_DESC(debug_level, "Debug level"); |
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1569 | 84 |
/** \endcond */ |
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85 |
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/** Standard termios for ec_tty devices. |
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* |
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88 |
* Simplest possible configuration, as you would expect. |
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89 |
*/ |
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90 |
static struct ktermios ec_tty_std_termios = { |
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91 |
.c_iflag = 0, |
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|
92 |
.c_oflag = 0, |
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|
93 |
.c_cflag = B9600 | CS8 | CREAD, |
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94 |
.c_lflag = 0, |
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95 |
.c_cc = INIT_C_CC, |
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96 |
}; |
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97 |
|
1569 | 98 |
struct ec_tty { |
99 |
int minor; |
|
100 |
struct device *dev; |
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101 |
|
1575 | 102 |
uint8_t tx_buffer[EC_TTY_TX_BUFFER_SIZE]; |
103 |
unsigned int tx_read_idx; |
|
104 |
unsigned int tx_write_idx; |
|
105 |
unsigned int wakeup; |
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1577
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106 |
|
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|
107 |
uint8_t rx_buffer[EC_TTY_RX_BUFFER_SIZE]; |
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108 |
unsigned int rx_read_idx; |
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109 |
unsigned int rx_write_idx; |
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110 |
|
1575 | 111 |
struct timer_list timer; |
112 |
struct tty_struct *tty; |
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113 |
unsigned int open_count; |
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114 |
struct semaphore sem; |
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115 |
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116 |
ec_tty_operations_t ops; |
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117 |
void *cb_data; |
1569 | 118 |
}; |
1565 | 119 |
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1575 | 120 |
static const struct tty_operations ec_tty_ops; // see below |
121 |
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1565 | 122 |
/*****************************************************************************/ |
123 |
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124 |
/** Module initialization. |
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125 |
* |
|
126 |
* \return 0 on success, else < 0 |
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127 |
*/ |
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128 |
int __init ec_tty_init_module(void) |
|
129 |
{ |
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1569 | 130 |
int i, ret = 0; |
1565 | 131 |
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1570 | 132 |
printk(KERN_INFO PFX "TTY driver %s\n", EC_MASTER_VERSION); |
1565 | 133 |
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134 |
sema_init(&tty_sem, 1); |
1569 | 135 |
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136 |
for (i = 0; i < EC_TTY_MAX_DEVICES; i++) { |
|
137 |
ttys[i] = NULL; |
|
138 |
} |
|
139 |
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140 |
tty_driver = alloc_tty_driver(EC_TTY_MAX_DEVICES); |
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141 |
if (!tty_driver) { |
1570 | 142 |
printk(KERN_ERR PFX "Failed to allocate tty driver.\n"); |
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143 |
ret = -ENOMEM; |
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144 |
goto out_return; |
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145 |
} |
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|
146 |
|
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147 |
tty_driver->owner = THIS_MODULE; |
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148 |
tty_driver->driver_name = "EtherCAT TTY"; |
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|
149 |
tty_driver->name = "ttyEC"; |
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|
150 |
tty_driver->major = 0; |
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|
151 |
tty_driver->minor_start = 0; |
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|
152 |
tty_driver->type = TTY_DRIVER_TYPE_SERIAL; |
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|
153 |
tty_driver->subtype = SERIAL_TYPE_NORMAL; |
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|
154 |
tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; |
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|
155 |
tty_driver->init_termios = ec_tty_std_termios; |
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|
156 |
tty_set_operations(tty_driver, &ec_tty_ops); |
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|
157 |
|
d9bbbe1883ab
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|
158 |
ret = tty_register_driver(tty_driver); |
d9bbbe1883ab
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diff
changeset
|
159 |
if (ret) { |
1570 | 160 |
printk(KERN_ERR PFX "Failed to register tty driver.\n"); |
1568
d9bbbe1883ab
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|
161 |
goto out_put; |
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|
162 |
} |
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|
163 |
|
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|
164 |
return ret; |
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|
165 |
|
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Register a TTY driver with one device.
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|
166 |
out_put: |
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|
167 |
put_tty_driver(tty_driver); |
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|
168 |
out_return: |
1565 | 169 |
return ret; |
170 |
} |
|
171 |
||
172 |
/*****************************************************************************/ |
|
173 |
||
174 |
/** Module cleanup. |
|
175 |
* |
|
176 |
* Clears all master instances. |
|
177 |
*/ |
|
178 |
void __exit ec_tty_cleanup_module(void) |
|
179 |
{ |
|
1568
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180 |
tty_unregister_driver(tty_driver); |
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|
181 |
put_tty_driver(tty_driver); |
1570 | 182 |
printk(KERN_INFO PFX "Module unloading.\n"); |
1565 | 183 |
} |
184 |
||
1786 | 185 |
/****************************************************************************** |
186 |
* ec_tty_t methods. |
|
187 |
*****************************************************************************/ |
|
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|
188 |
|
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189 |
int ec_tty_init(ec_tty_t *t, int minor, |
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|
190 |
const ec_tty_operations_t *ops, void *cb_data) |
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191 |
{ |
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|
192 |
int ret; |
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|
193 |
tcflag_t cflag; |
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|
194 |
struct tty_struct *tty; |
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|
195 |
|
058248c47ba0
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|
196 |
t->minor = minor; |
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|
197 |
t->tx_read_idx = 0; |
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|
198 |
t->tx_write_idx = 0; |
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|
199 |
t->wakeup = 0; |
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|
200 |
t->rx_read_idx = 0; |
058248c47ba0
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|
201 |
t->rx_write_idx = 0; |
058248c47ba0
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|
202 |
init_timer(&t->timer); |
058248c47ba0
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|
203 |
t->tty = NULL; |
1797
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diff
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|
204 |
t->open_count = 0; |
1808
96adb3e6db74
Replaced deprecated init_MUTEX in tty code.
Florian Pose <fp@igh-essen.com>
parents:
1797
diff
changeset
|
205 |
sema_init(&t->sem, 1); |
1789
058248c47ba0
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parents:
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diff
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|
206 |
t->ops = *ops; |
058248c47ba0
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|
207 |
t->cb_data = cb_data; |
058248c47ba0
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|
208 |
|
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|
209 |
t->dev = tty_register_device(tty_driver, t->minor, NULL); |
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210 |
if (IS_ERR(t->dev)) { |
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211 |
printk(KERN_ERR PFX "Failed to register tty device.\n"); |
1789
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212 |
return PTR_ERR(t->dev); |
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|
213 |
} |
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|
214 |
|
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|
215 |
// Tell the device-specific implementation about the initial cflags |
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|
216 |
tty = tty_driver->ttys[minor]; |
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|
217 |
|
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|
218 |
if (tty && tty->termios) { // already opened before |
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|
219 |
cflag = tty->termios->c_cflag; |
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|
220 |
} else { |
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|
221 |
cflag = tty_driver->init_termios.c_cflag; |
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|
222 |
} |
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|
223 |
ret = t->ops.cflag_changed(t->cb_data, cflag); |
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|
224 |
if (ret) { |
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|
225 |
printk(KERN_ERR PFX "ERROR: Initial cflag 0x%x not accepted.\n", |
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|
226 |
cflag); |
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|
227 |
tty_unregister_device(tty_driver, t->minor); |
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|
228 |
return ret; |
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|
229 |
} |
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|
230 |
|
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|
231 |
t->timer.function = ec_tty_wakeup; |
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|
232 |
t->timer.data = (unsigned long) t; |
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|
233 |
t->timer.expires = jiffies + 10; |
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|
234 |
add_timer(&t->timer); |
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|
235 |
return 0; |
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|
236 |
} |
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|
237 |
|
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|
238 |
/*****************************************************************************/ |
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|
239 |
|
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|
240 |
void ec_tty_clear(ec_tty_t *tty) |
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|
241 |
{ |
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|
242 |
del_timer_sync(&tty->timer); |
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|
243 |
tty_unregister_device(tty_driver, tty->minor); |
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|
244 |
} |
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|
245 |
|
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|
246 |
/*****************************************************************************/ |
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|
247 |
|
1786 | 248 |
unsigned int ec_tty_tx_size(ec_tty_t *tty) |
249 |
{ |
|
250 |
unsigned int ret; |
|
251 |
||
252 |
if (tty->tx_write_idx >= tty->tx_read_idx) { |
|
253 |
ret = tty->tx_write_idx - tty->tx_read_idx; |
|
254 |
} else { |
|
255 |
ret = EC_TTY_TX_BUFFER_SIZE + tty->tx_write_idx - tty->tx_read_idx; |
|
256 |
} |
|
257 |
||
258 |
return ret; |
|
259 |
} |
|
260 |
||
261 |
/*****************************************************************************/ |
|
262 |
||
263 |
unsigned int ec_tty_tx_space(ec_tty_t *tty) |
|
264 |
{ |
|
265 |
return EC_TTY_TX_BUFFER_SIZE - 1 - ec_tty_tx_size(tty); |
|
266 |
} |
|
267 |
||
268 |
/*****************************************************************************/ |
|
269 |
||
270 |
unsigned int ec_tty_rx_size(ec_tty_t *tty) |
|
271 |
{ |
|
272 |
unsigned int ret; |
|
273 |
||
274 |
if (tty->rx_write_idx >= tty->rx_read_idx) { |
|
275 |
ret = tty->rx_write_idx - tty->rx_read_idx; |
|
276 |
} else { |
|
277 |
ret = EC_TTY_RX_BUFFER_SIZE + tty->rx_write_idx - tty->rx_read_idx; |
|
278 |
} |
|
279 |
||
280 |
return ret; |
|
281 |
} |
|
282 |
||
283 |
/*****************************************************************************/ |
|
284 |
||
285 |
unsigned int ec_tty_rx_space(ec_tty_t *tty) |
|
286 |
{ |
|
287 |
return EC_TTY_RX_BUFFER_SIZE - 1 - ec_tty_rx_size(tty); |
|
288 |
} |
|
289 |
||
290 |
/*****************************************************************************/ |
|
291 |
||
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|
292 |
int ec_tty_get_serial_info(ec_tty_t *tty, struct serial_struct *data) |
94dbb44884ec
Basic configuration for tty.
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|
293 |
{ |
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Passing tty cflag to serial implementation.
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|
294 |
struct serial_struct tmp; |
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Passing tty cflag to serial implementation.
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|
295 |
|
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diff
changeset
|
296 |
if (!data) |
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Basic configuration for tty.
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|
297 |
return -EFAULT; |
1779
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|
298 |
|
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|
299 |
memset(&tmp, 0, sizeof(tmp)); |
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Passing tty cflag to serial implementation.
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|
300 |
|
9fab229d6ca9
Passing tty cflag to serial implementation.
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changeset
|
301 |
if (copy_to_user(data, &tmp, sizeof(*data))) { |
9fab229d6ca9
Passing tty cflag to serial implementation.
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|
302 |
return -EFAULT; |
9fab229d6ca9
Passing tty cflag to serial implementation.
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|
303 |
} |
9fab229d6ca9
Passing tty cflag to serial implementation.
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diff
changeset
|
304 |
return 0; |
1778
94dbb44884ec
Basic configuration for tty.
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diff
changeset
|
305 |
} |
94dbb44884ec
Basic configuration for tty.
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changeset
|
306 |
|
1786 | 307 |
/*****************************************************************************/ |
308 |
||
309 |
/** Timer function. |
|
310 |
*/ |
|
311 |
void ec_tty_wakeup(unsigned long data) |
|
312 |
{ |
|
313 |
ec_tty_t *tty = (ec_tty_t *) data; |
|
314 |
size_t to_recv; |
|
315 |
||
316 |
/* Wake up any process waiting to send data */ |
|
317 |
if (tty->wakeup) { |
|
318 |
if (tty->tty) { |
|
319 |
#if EC_TTY_DEBUG >= 1 |
|
320 |
printk(KERN_INFO PFX "Waking up.\n"); |
|
321 |
#endif |
|
322 |
tty_wakeup(tty->tty); |
|
323 |
} |
|
324 |
tty->wakeup = 0; |
|
325 |
} |
|
326 |
||
327 |
/* Push received data into TTY core. */ |
|
328 |
to_recv = ec_tty_rx_size(tty); |
|
329 |
if (to_recv && tty->tty) { |
|
330 |
unsigned char *cbuf; |
|
331 |
int space = tty_prepare_flip_string(tty->tty, &cbuf, to_recv); |
|
332 |
||
333 |
if (space < to_recv) { |
|
334 |
printk(KERN_WARNING PFX "Insufficient space to_recv=%d space=%d\n", |
|
335 |
to_recv, space); |
|
336 |
} |
|
337 |
||
338 |
if (space < 0) { |
|
339 |
to_recv = 0; |
|
340 |
} else { |
|
341 |
to_recv = space; |
|
342 |
} |
|
343 |
||
344 |
if (to_recv) { |
|
345 |
unsigned int i; |
|
346 |
||
347 |
#if EC_TTY_DEBUG >= 1 |
|
348 |
printk(KERN_INFO PFX "Pushing %u bytes to TTY core.\n", to_recv); |
|
349 |
#endif |
|
350 |
||
351 |
for (i = 0; i < to_recv; i++) { |
|
352 |
cbuf[i] = tty->rx_buffer[tty->rx_read_idx]; |
|
353 |
tty->rx_read_idx = |
|
354 |
(tty->rx_read_idx + 1) % EC_TTY_RX_BUFFER_SIZE; |
|
355 |
} |
|
356 |
tty_flip_buffer_push(tty->tty); |
|
357 |
} |
|
358 |
} |
|
359 |
||
360 |
tty->timer.expires += 1; |
|
361 |
add_timer(&tty->timer); |
|
362 |
} |
|
363 |
||
1569 | 364 |
/****************************************************************************** |
365 |
* Device callbacks |
|
366 |
*****************************************************************************/ |
|
367 |
||
1568
d9bbbe1883ab
Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
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diff
changeset
|
368 |
static int ec_tty_open(struct tty_struct *tty, struct file *file) |
d9bbbe1883ab
Register a TTY driver with one device.
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parents:
1565
diff
changeset
|
369 |
{ |
1571 | 370 |
ec_tty_t *t; |
1787
439f186185be
Callback set via own structure.
Florian Pose <fp@igh-essen.com>
parents:
1786
diff
changeset
|
371 |
int line = tty->index; |
1571 | 372 |
|
1577
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
373 |
#if EC_TTY_DEBUG >= 1 |
1797
5bf740cd1599
Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents:
1796
diff
changeset
|
374 |
printk(KERN_INFO PFX "%s(tty=%p, file=%p): Opening line %i.\n", |
5bf740cd1599
Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents:
1796
diff
changeset
|
375 |
__func__, tty, file, line); |
1577
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
376 |
#endif |
1571 | 377 |
|
1779
9fab229d6ca9
Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents:
1778
diff
changeset
|
378 |
if (line < 0 || line >= EC_TTY_MAX_DEVICES) { |
1797
5bf740cd1599
Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents:
1796
diff
changeset
|
379 |
tty->driver_data = NULL; |
1779
9fab229d6ca9
Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents:
1778
diff
changeset
|
380 |
return -ENXIO; |
1571 | 381 |
} |
382 |
||
383 |
t = ttys[line]; |
|
384 |
if (!t) { |
|
1797
5bf740cd1599
Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents:
1796
diff
changeset
|
385 |
tty->driver_data = NULL; |
1571 | 386 |
return -ENXIO; |
387 |
} |
|
388 |
||
1797
5bf740cd1599
Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents:
1796
diff
changeset
|
389 |
if (!t->tty) { |
5bf740cd1599
Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents:
1796
diff
changeset
|
390 |
t->tty = tty; |
5bf740cd1599
Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents:
1796
diff
changeset
|
391 |
tty->driver_data = t; |
5bf740cd1599
Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents:
1796
diff
changeset
|
392 |
} |
5bf740cd1599
Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents:
1796
diff
changeset
|
393 |
|
5bf740cd1599
Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents:
1796
diff
changeset
|
394 |
down(&t->sem); |
5bf740cd1599
Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents:
1796
diff
changeset
|
395 |
t->open_count++; |
5bf740cd1599
Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents:
1796
diff
changeset
|
396 |
up(&t->sem); |
1571 | 397 |
return 0; |
1568
d9bbbe1883ab
Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents:
1565
diff
changeset
|
398 |
} |
d9bbbe1883ab
Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents:
1565
diff
changeset
|
399 |
|
d9bbbe1883ab
Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents:
1565
diff
changeset
|
400 |
/*****************************************************************************/ |
d9bbbe1883ab
Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents:
1565
diff
changeset
|
401 |
|
d9bbbe1883ab
Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents:
1565
diff
changeset
|
402 |
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
|
403 |
{ |
1575 | 404 |
ec_tty_t *t = (ec_tty_t *) tty->driver_data; |
405 |
||
1577
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
406 |
#if EC_TTY_DEBUG >= 1 |
1797
5bf740cd1599
Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents:
1796
diff
changeset
|
407 |
printk(KERN_INFO PFX "%s(tty=%p, file=%p): Closing line %i.\n", |
5bf740cd1599
Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents:
1796
diff
changeset
|
408 |
__func__, tty, file, tty->index); |
5bf740cd1599
Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents:
1796
diff
changeset
|
409 |
#endif |
5bf740cd1599
Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents:
1796
diff
changeset
|
410 |
|
5bf740cd1599
Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents:
1796
diff
changeset
|
411 |
if (t) { |
5bf740cd1599
Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents:
1796
diff
changeset
|
412 |
down(&t->sem); |
5bf740cd1599
Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents:
1796
diff
changeset
|
413 |
if (--t->open_count == 0) { |
5bf740cd1599
Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents:
1796
diff
changeset
|
414 |
t->tty = NULL; |
5bf740cd1599
Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents:
1796
diff
changeset
|
415 |
} |
5bf740cd1599
Allow multiple open() calls to tty devices.
Florian Pose <fp@igh-essen.com>
parents:
1796
diff
changeset
|
416 |
up(&t->sem); |
1575 | 417 |
} |
1568
d9bbbe1883ab
Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents:
1565
diff
changeset
|
418 |
} |
d9bbbe1883ab
Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents:
1565
diff
changeset
|
419 |
|
d9bbbe1883ab
Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents:
1565
diff
changeset
|
420 |
/*****************************************************************************/ |
d9bbbe1883ab
Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents:
1565
diff
changeset
|
421 |
|
d9bbbe1883ab
Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents:
1565
diff
changeset
|
422 |
static int ec_tty_write( |
d9bbbe1883ab
Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents:
1565
diff
changeset
|
423 |
struct tty_struct *tty, |
d9bbbe1883ab
Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents:
1565
diff
changeset
|
424 |
const unsigned char *buffer, |
d9bbbe1883ab
Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents:
1565
diff
changeset
|
425 |
int count |
d9bbbe1883ab
Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents:
1565
diff
changeset
|
426 |
) |
d9bbbe1883ab
Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents:
1565
diff
changeset
|
427 |
{ |
1575 | 428 |
ec_tty_t *t = (ec_tty_t *) tty->driver_data; |
429 |
unsigned int data_size, i; |
|
430 |
||
1577
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
431 |
#if EC_TTY_DEBUG >= 1 |
1575 | 432 |
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
|
433 |
#endif |
1575 | 434 |
|
435 |
if (count <= 0) { |
|
436 |
return 0; |
|
437 |
} |
|
438 |
||
439 |
data_size = min(ec_tty_tx_space(t), (unsigned int) count); |
|
440 |
for (i = 0; i < data_size; i++) { |
|
441 |
t->tx_buffer[t->tx_write_idx] = buffer[i]; |
|
442 |
t->tx_write_idx = (t->tx_write_idx + 1) % EC_TTY_TX_BUFFER_SIZE; |
|
443 |
} |
|
444 |
||
1577
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
445 |
#if EC_TTY_DEBUG >= 1 |
1575 | 446 |
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
|
447 |
#endif |
1575 | 448 |
return data_size; |
449 |
} |
|
450 |
||
451 |
/*****************************************************************************/ |
|
452 |
||
1595
8d8657654921
Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents:
1577
diff
changeset
|
453 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26) |
8d8657654921
Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents:
1577
diff
changeset
|
454 |
static int ec_tty_put_char(struct tty_struct *tty, unsigned char ch) |
8d8657654921
Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents:
1577
diff
changeset
|
455 |
#else |
1575 | 456 |
static void ec_tty_put_char(struct tty_struct *tty, unsigned char ch) |
1595
8d8657654921
Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents:
1577
diff
changeset
|
457 |
#endif |
1575 | 458 |
{ |
459 |
ec_tty_t *t = (ec_tty_t *) tty->driver_data; |
|
460 |
||
1577
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
461 |
#if EC_TTY_DEBUG >= 1 |
1575 | 462 |
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
|
463 |
#endif |
1575 | 464 |
|
465 |
if (ec_tty_tx_space(t)) { |
|
466 |
t->tx_buffer[t->tx_write_idx] = ch; |
|
467 |
t->tx_write_idx = (t->tx_write_idx + 1) % EC_TTY_TX_BUFFER_SIZE; |
|
1595
8d8657654921
Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents:
1577
diff
changeset
|
468 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26) |
8d8657654921
Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents:
1577
diff
changeset
|
469 |
return 1; |
8d8657654921
Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents:
1577
diff
changeset
|
470 |
#endif |
1575 | 471 |
} else { |
472 |
printk(KERN_WARNING PFX "%s(): Dropped a byte!\n", __func__); |
|
1595
8d8657654921
Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents:
1577
diff
changeset
|
473 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 26) |
8d8657654921
Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents:
1577
diff
changeset
|
474 |
return 0; |
8d8657654921
Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents:
1577
diff
changeset
|
475 |
#endif |
1575 | 476 |
} |
477 |
} |
|
478 |
||
479 |
/*****************************************************************************/ |
|
480 |
||
481 |
static int ec_tty_write_room(struct tty_struct *tty) |
|
482 |
{ |
|
483 |
ec_tty_t *t = (ec_tty_t *) tty->driver_data; |
|
484 |
int ret = ec_tty_tx_space(t); |
|
485 |
||
1577
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
486 |
#if EC_TTY_DEBUG >= 2 |
1575 | 487 |
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
|
488 |
#endif |
1575 | 489 |
|
490 |
return ret; |
|
491 |
} |
|
492 |
||
493 |
/*****************************************************************************/ |
|
494 |
||
495 |
static int ec_tty_chars_in_buffer(struct tty_struct *tty) |
|
496 |
{ |
|
497 |
ec_tty_t *t = (ec_tty_t *) tty->driver_data; |
|
498 |
int ret; |
|
499 |
||
1577
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
500 |
#if EC_TTY_DEBUG >= 2 |
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
501 |
printk(KERN_INFO PFX "%s().\n", __func__); |
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
502 |
#endif |
1575 | 503 |
|
504 |
ret = ec_tty_tx_size(t); |
|
505 |
||
1577
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
506 |
#if EC_TTY_DEBUG >= 2 |
1575 | 507 |
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
|
508 |
#endif |
1575 | 509 |
|
510 |
return ret; |
|
511 |
} |
|
512 |
||
513 |
/*****************************************************************************/ |
|
514 |
||
515 |
static void ec_tty_flush_buffer(struct tty_struct *tty) |
|
516 |
{ |
|
1577
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
517 |
#if EC_TTY_DEBUG >= 2 |
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
518 |
printk(KERN_INFO PFX "%s().\n", __func__); |
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
519 |
#endif |
1796 | 520 |
|
521 |
// FIXME empty ring buffer |
|
1575 | 522 |
} |
523 |
||
524 |
/*****************************************************************************/ |
|
525 |
||
526 |
static int ec_tty_ioctl(struct tty_struct *tty, struct file *file, |
|
1779
9fab229d6ca9
Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents:
1778
diff
changeset
|
527 |
unsigned int cmd, unsigned long arg) |
1575 | 528 |
{ |
1778
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
529 |
ec_tty_t *t = (ec_tty_t *) tty->driver_data; |
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
530 |
int ret = -ENOTTY; |
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
531 |
|
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
532 |
#if EC_TTY_DEBUG >= 2 |
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
533 |
printk(KERN_INFO PFX "%s(tty=%p, file=%p, cmd=%08x, arg=%08lx).\n", |
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
534 |
__func__, tty, file, cmd, arg); |
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
535 |
printk(KERN_INFO PFX "decoded: type=%02x nr=%u\n", |
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
536 |
_IOC_TYPE(cmd), _IOC_NR(cmd)); |
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
537 |
#endif |
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
538 |
|
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
539 |
switch (cmd) { |
1779
9fab229d6ca9
Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents:
1778
diff
changeset
|
540 |
case TIOCGSERIAL: |
9fab229d6ca9
Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents:
1778
diff
changeset
|
541 |
if (access_ok(VERIFY_WRITE, |
1778
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
542 |
(void *) arg, sizeof(struct serial_struct))) { |
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
543 |
ret = ec_tty_get_serial_info(t, (struct serial_struct *) arg); |
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
544 |
} else { |
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
545 |
ret = -EFAULT; |
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
546 |
} |
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
547 |
break; |
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
548 |
|
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
549 |
default: |
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
550 |
#if EC_TTY_DEBUG >= 2 |
1796 | 551 |
printk(KERN_INFO PFX "no ioctl() -> handled by tty core!\n"); |
1778
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
552 |
#endif |
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
553 |
ret = -ENOIOCTLCMD; |
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
554 |
break; |
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
555 |
} |
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
556 |
|
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
557 |
return ret; |
1575 | 558 |
} |
559 |
||
560 |
/*****************************************************************************/ |
|
561 |
||
562 |
static void ec_tty_set_termios(struct tty_struct *tty, |
|
1779
9fab229d6ca9
Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents:
1778
diff
changeset
|
563 |
struct ktermios *old_termios) |
9fab229d6ca9
Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents:
1778
diff
changeset
|
564 |
{ |
9fab229d6ca9
Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents:
1778
diff
changeset
|
565 |
ec_tty_t *t = (ec_tty_t *) tty->driver_data; |
9fab229d6ca9
Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents:
1778
diff
changeset
|
566 |
int ret; |
1778
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
567 |
|
1577
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
568 |
#if EC_TTY_DEBUG >= 2 |
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
569 |
printk(KERN_INFO PFX "%s().\n", __func__); |
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
570 |
#endif |
1778
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
571 |
|
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
572 |
if (tty->termios->c_cflag == old_termios->c_cflag) |
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
573 |
return; |
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
574 |
|
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
575 |
#if EC_TTY_DEBUG >= 2 |
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
576 |
printk(KERN_INFO "cflag changed from %x to %x.\n", |
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
577 |
old_termios->c_cflag, tty->termios->c_cflag); |
94dbb44884ec
Basic configuration for tty.
Florian Pose <fp@igh-essen.com>
parents:
1595
diff
changeset
|
578 |
#endif |
1779
9fab229d6ca9
Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents:
1778
diff
changeset
|
579 |
|
1787
439f186185be
Callback set via own structure.
Florian Pose <fp@igh-essen.com>
parents:
1786
diff
changeset
|
580 |
ret = t->ops.cflag_changed(t->cb_data, tty->termios->c_cflag); |
1779
9fab229d6ca9
Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents:
1778
diff
changeset
|
581 |
if (ret) { |
9fab229d6ca9
Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents:
1778
diff
changeset
|
582 |
printk(KERN_ERR PFX "ERROR: cflag 0x%x not accepted.\n", |
9fab229d6ca9
Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents:
1778
diff
changeset
|
583 |
tty->termios->c_cflag); |
9fab229d6ca9
Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents:
1778
diff
changeset
|
584 |
tty->termios->c_cflag = old_termios->c_cflag; |
9fab229d6ca9
Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents:
1778
diff
changeset
|
585 |
} |
1575 | 586 |
} |
587 |
||
588 |
/*****************************************************************************/ |
|
589 |
||
590 |
static void ec_tty_stop(struct tty_struct *tty) |
|
591 |
{ |
|
1577
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
592 |
#if EC_TTY_DEBUG >= 2 |
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
593 |
printk(KERN_INFO PFX "%s().\n", __func__); |
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
594 |
#endif |
1575 | 595 |
} |
596 |
||
597 |
/*****************************************************************************/ |
|
598 |
||
599 |
static void ec_tty_start(struct tty_struct *tty) |
|
600 |
{ |
|
1577
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
601 |
#if EC_TTY_DEBUG >= 2 |
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
602 |
printk(KERN_INFO PFX "%s().\n", __func__); |
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
603 |
#endif |
1575 | 604 |
} |
605 |
||
606 |
/*****************************************************************************/ |
|
607 |
||
608 |
static void ec_tty_hangup(struct tty_struct *tty) |
|
609 |
{ |
|
1577
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
610 |
#if EC_TTY_DEBUG >= 2 |
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
611 |
printk(KERN_INFO PFX "%s().\n", __func__); |
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
612 |
#endif |
1575 | 613 |
} |
614 |
||
615 |
/*****************************************************************************/ |
|
616 |
||
1595
8d8657654921
Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents:
1577
diff
changeset
|
617 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 27) |
8d8657654921
Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents:
1577
diff
changeset
|
618 |
static int ec_tty_break(struct tty_struct *tty, int break_state) |
8d8657654921
Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents:
1577
diff
changeset
|
619 |
#else |
1575 | 620 |
static void ec_tty_break(struct tty_struct *tty, int break_state) |
1595
8d8657654921
Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents:
1577
diff
changeset
|
621 |
#endif |
1575 | 622 |
{ |
1577
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
623 |
#if EC_TTY_DEBUG >= 2 |
1575 | 624 |
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
|
625 |
#endif |
1595
8d8657654921
Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents:
1577
diff
changeset
|
626 |
|
8d8657654921
Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents:
1577
diff
changeset
|
627 |
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 27) |
8d8657654921
Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents:
1577
diff
changeset
|
628 |
return -EIO; // not implemented |
8d8657654921
Implemented tty put_char and break_ctl callbacks for kernels newer than 2.6.26
Florian Pose <fp@igh-essen.com>
parents:
1577
diff
changeset
|
629 |
#endif |
1575 | 630 |
} |
631 |
||
632 |
/*****************************************************************************/ |
|
633 |
||
634 |
static void ec_tty_send_xchar(struct tty_struct *tty, char ch) |
|
635 |
{ |
|
1577
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
636 |
#if EC_TTY_DEBUG >= 2 |
1575 | 637 |
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
|
638 |
#endif |
1575 | 639 |
} |
640 |
||
641 |
/*****************************************************************************/ |
|
642 |
||
643 |
static void ec_tty_wait_until_sent(struct tty_struct *tty, int timeout) |
|
644 |
{ |
|
1577
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
645 |
#if EC_TTY_DEBUG >= 2 |
1575 | 646 |
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
|
647 |
#endif |
1575 | 648 |
} |
649 |
||
650 |
/*****************************************************************************/ |
|
651 |
||
652 |
static const struct tty_operations ec_tty_ops = { |
|
653 |
.open = ec_tty_open, |
|
654 |
.close = ec_tty_close, |
|
655 |
.write = ec_tty_write, |
|
1779
9fab229d6ca9
Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents:
1778
diff
changeset
|
656 |
.put_char = ec_tty_put_char, |
9fab229d6ca9
Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents:
1778
diff
changeset
|
657 |
.write_room = ec_tty_write_room, |
9fab229d6ca9
Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents:
1778
diff
changeset
|
658 |
.chars_in_buffer = ec_tty_chars_in_buffer, |
9fab229d6ca9
Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents:
1778
diff
changeset
|
659 |
.flush_buffer = ec_tty_flush_buffer, |
9fab229d6ca9
Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents:
1778
diff
changeset
|
660 |
.ioctl = ec_tty_ioctl, |
9fab229d6ca9
Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents:
1778
diff
changeset
|
661 |
.set_termios = ec_tty_set_termios, |
9fab229d6ca9
Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents:
1778
diff
changeset
|
662 |
.stop = ec_tty_stop, |
9fab229d6ca9
Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents:
1778
diff
changeset
|
663 |
.start = ec_tty_start, |
9fab229d6ca9
Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents:
1778
diff
changeset
|
664 |
.hangup = ec_tty_hangup, |
9fab229d6ca9
Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents:
1778
diff
changeset
|
665 |
.break_ctl = ec_tty_break, |
9fab229d6ca9
Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents:
1778
diff
changeset
|
666 |
.send_xchar = ec_tty_send_xchar, |
9fab229d6ca9
Passing tty cflag to serial implementation.
Florian Pose <fp@igh-essen.com>
parents:
1778
diff
changeset
|
667 |
.wait_until_sent = ec_tty_wait_until_sent, |
1575 | 668 |
}; |
1568
d9bbbe1883ab
Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents:
1565
diff
changeset
|
669 |
|
1569 | 670 |
/****************************************************************************** |
671 |
* Public functions and methods |
|
672 |
*****************************************************************************/ |
|
673 |
||
1787
439f186185be
Callback set via own structure.
Florian Pose <fp@igh-essen.com>
parents:
1786
diff
changeset
|
674 |
ec_tty_t *ectty_create(const ec_tty_operations_t *ops, void *cb_data) |
1569 | 675 |
{ |
676 |
ec_tty_t *tty; |
|
677 |
int minor, ret; |
|
678 |
||
679 |
if (down_interruptible(&tty_sem)) { |
|
680 |
return ERR_PTR(-EINTR); |
|
681 |
} |
|
682 |
||
683 |
for (minor = 0; minor < EC_TTY_MAX_DEVICES; minor++) { |
|
684 |
if (!ttys[minor]) { |
|
1575 | 685 |
printk(KERN_INFO PFX "Creating TTY interface %i.\n", minor); |
686 |
||
1569 | 687 |
tty = kmalloc(sizeof(ec_tty_t), GFP_KERNEL); |
688 |
if (!tty) { |
|
689 |
up(&tty_sem); |
|
1570 | 690 |
printk(KERN_ERR PFX "Failed to allocate memory.\n"); |
1569 | 691 |
return ERR_PTR(-ENOMEM); |
692 |
} |
|
693 |
||
1787
439f186185be
Callback set via own structure.
Florian Pose <fp@igh-essen.com>
parents:
1786
diff
changeset
|
694 |
ret = ec_tty_init(tty, minor, ops, cb_data); |
1569 | 695 |
if (ret) { |
696 |
up(&tty_sem); |
|
697 |
kfree(tty); |
|
698 |
return ERR_PTR(ret); |
|
699 |
} |
|
700 |
||
701 |
ttys[minor] = tty; |
|
702 |
up(&tty_sem); |
|
703 |
return tty; |
|
704 |
} |
|
705 |
} |
|
706 |
||
707 |
up(&tty_sem); |
|
1570 | 708 |
printk(KERN_ERR PFX "No free interfaces avaliable.\n"); |
1569 | 709 |
return ERR_PTR(-EBUSY); |
710 |
} |
|
711 |
||
712 |
/*****************************************************************************/ |
|
713 |
||
714 |
void ectty_free(ec_tty_t *tty) |
|
715 |
{ |
|
1575 | 716 |
printk(KERN_INFO PFX "Freeing TTY interface %i.\n", tty->minor); |
717 |
||
1569 | 718 |
ec_tty_clear(tty); |
1570 | 719 |
ttys[tty->minor] = NULL; |
1569 | 720 |
kfree(tty); |
721 |
} |
|
722 |
||
1568
d9bbbe1883ab
Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents:
1565
diff
changeset
|
723 |
/*****************************************************************************/ |
d9bbbe1883ab
Register a TTY driver with one device.
Florian Pose <fp@igh-essen.com>
parents:
1565
diff
changeset
|
724 |
|
1575 | 725 |
unsigned int ectty_tx_data(ec_tty_t *tty, uint8_t *buffer, size_t size) |
726 |
{ |
|
727 |
unsigned int data_size = min(ec_tty_tx_size(tty), size), i; |
|
728 |
||
729 |
if (data_size) { |
|
1577
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
730 |
#if EC_TTY_DEBUG >= 1 |
1575 | 731 |
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
|
732 |
#endif |
1575 | 733 |
} |
734 |
||
735 |
for (i = 0; i < data_size; i++) { |
|
736 |
buffer[i] = tty->tx_buffer[tty->tx_read_idx]; |
|
737 |
tty->tx_read_idx = (tty->tx_read_idx + 1) % EC_TTY_TX_BUFFER_SIZE; |
|
738 |
} |
|
739 |
||
740 |
if (data_size) { |
|
741 |
tty->wakeup = 1; |
|
742 |
} |
|
743 |
||
744 |
return data_size; |
|
745 |
} |
|
746 |
||
747 |
/*****************************************************************************/ |
|
748 |
||
1577
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
749 |
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
|
750 |
{ |
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
751 |
size_t to_recv; |
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
752 |
|
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
753 |
if (size) { |
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
754 |
unsigned int i; |
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
755 |
|
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
756 |
#if EC_TTY_DEBUG >= 1 |
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
757 |
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
|
758 |
#endif |
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
759 |
|
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
760 |
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
|
761 |
|
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
762 |
if (to_recv < size) { |
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
763 |
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
|
764 |
} |
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
765 |
|
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
766 |
for (i = 0; i < size; i++) { |
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
767 |
tty->rx_buffer[tty->rx_write_idx] = buffer[i]; |
1786 | 768 |
tty->rx_write_idx = |
769 |
(tty->rx_write_idx + 1) % EC_TTY_RX_BUFFER_SIZE; |
|
1577
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
770 |
} |
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
771 |
} |
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
772 |
} |
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
773 |
|
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
774 |
/*****************************************************************************/ |
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
775 |
|
1565 | 776 |
/** \cond */ |
777 |
||
778 |
module_init(ec_tty_init_module); |
|
779 |
module_exit(ec_tty_cleanup_module); |
|
780 |
||
1569 | 781 |
EXPORT_SYMBOL(ectty_create); |
782 |
EXPORT_SYMBOL(ectty_free); |
|
1575 | 783 |
EXPORT_SYMBOL(ectty_tx_data); |
1577
fa3f66b783c1
Implemented reading direction of tty driver.
Florian Pose <fp@igh-essen.com>
parents:
1575
diff
changeset
|
784 |
EXPORT_SYMBOL(ectty_rx_data); |
1569 | 785 |
|
1565 | 786 |
/** \endcond */ |
787 |
||
788 |
/*****************************************************************************/ |