Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /********************************************************************* |
| 2 | * |
| 3 | * Filename: irport.c |
| 4 | * Version: 1.0 |
| 5 | * Description: Half duplex serial port SIR driver for IrDA. |
| 6 | * Status: Experimental. |
| 7 | * Author: Dag Brattli <dagb@cs.uit.no> |
| 8 | * Created at: Sun Aug 3 13:49:59 1997 |
| 9 | * Modified at: Fri Jan 28 20:22:38 2000 |
| 10 | * Modified by: Dag Brattli <dagb@cs.uit.no> |
| 11 | * Sources: serial.c by Linus Torvalds |
| 12 | * |
| 13 | * Copyright (c) 1997, 1998, 1999-2000 Dag Brattli, All Rights Reserved. |
| 14 | * Copyright (c) 2000-2003 Jean Tourrilhes, All Rights Reserved. |
| 15 | * |
| 16 | * This program is free software; you can redistribute it and/or |
| 17 | * modify it under the terms of the GNU General Public License as |
| 18 | * published by the Free Software Foundation; either version 2 of |
| 19 | * the License, or (at your option) any later version. |
| 20 | * |
| 21 | * This program is distributed in the hope that it will be useful, |
| 22 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 23 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 24 | * GNU General Public License for more details. |
| 25 | * |
| 26 | * You should have received a copy of the GNU General Public License |
| 27 | * along with this program; if not, write to the Free Software |
| 28 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 29 | * MA 02111-1307 USA |
| 30 | * |
| 31 | * This driver is ment to be a small half duplex serial driver to be |
| 32 | * used for IR-chipsets that has a UART (16550) compatibility mode. |
| 33 | * Eventually it will replace irtty, because of irtty has some |
| 34 | * problems that is hard to get around when we don't have control |
| 35 | * over the serial driver. This driver may also be used by FIR |
| 36 | * drivers to handle SIR mode for them. |
| 37 | * |
| 38 | ********************************************************************/ |
| 39 | |
| 40 | #include <linux/module.h> |
| 41 | |
| 42 | #include <linux/kernel.h> |
| 43 | #include <linux/types.h> |
| 44 | #include <linux/ioport.h> |
| 45 | #include <linux/slab.h> |
| 46 | #include <linux/string.h> |
| 47 | #include <linux/skbuff.h> |
| 48 | #include <linux/serial_reg.h> |
| 49 | #include <linux/errno.h> |
| 50 | #include <linux/init.h> |
| 51 | #include <linux/spinlock.h> |
| 52 | #include <linux/delay.h> |
| 53 | #include <linux/rtnetlink.h> |
| 54 | #include <linux/bitops.h> |
| 55 | |
| 56 | #include <asm/system.h> |
| 57 | #include <asm/io.h> |
| 58 | |
| 59 | #include <net/irda/irda.h> |
| 60 | #include <net/irda/wrapper.h> |
| 61 | #include "irport.h" |
| 62 | |
| 63 | #define IO_EXTENT 8 |
| 64 | |
| 65 | /* |
| 66 | * Currently you'll need to set these values using insmod like this: |
| 67 | * insmod irport io=0x3e8 irq=11 |
| 68 | */ |
| 69 | static unsigned int io[] = { ~0, ~0, ~0, ~0 }; |
| 70 | static unsigned int irq[] = { 0, 0, 0, 0 }; |
| 71 | |
| 72 | static unsigned int qos_mtt_bits = 0x03; |
| 73 | |
| 74 | static struct irport_cb *dev_self[] = { NULL, NULL, NULL, NULL}; |
| 75 | static char *driver_name = "irport"; |
| 76 | |
| 77 | static inline void irport_write_wakeup(struct irport_cb *self); |
| 78 | static inline int irport_write(int iobase, int fifo_size, __u8 *buf, int len); |
| 79 | static inline void irport_receive(struct irport_cb *self); |
| 80 | |
| 81 | static int irport_net_ioctl(struct net_device *dev, struct ifreq *rq, |
| 82 | int cmd); |
| 83 | static inline int irport_is_receiving(struct irport_cb *self); |
| 84 | static int irport_set_dtr_rts(struct net_device *dev, int dtr, int rts); |
| 85 | static int irport_raw_write(struct net_device *dev, __u8 *buf, int len); |
| 86 | static struct net_device_stats *irport_net_get_stats(struct net_device *dev); |
| 87 | static int irport_change_speed_complete(struct irda_task *task); |
| 88 | static void irport_timeout(struct net_device *dev); |
| 89 | |
| 90 | static irqreturn_t irport_interrupt(int irq, void *dev_id, |
| 91 | struct pt_regs *regs); |
| 92 | static int irport_hard_xmit(struct sk_buff *skb, struct net_device *dev); |
| 93 | static void irport_change_speed(void *priv, __u32 speed); |
| 94 | static int irport_net_open(struct net_device *dev); |
| 95 | static int irport_net_close(struct net_device *dev); |
| 96 | |
| 97 | static struct irport_cb * |
| 98 | irport_open(int i, unsigned int iobase, unsigned int irq) |
| 99 | { |
| 100 | struct net_device *dev; |
| 101 | struct irport_cb *self; |
| 102 | |
| 103 | IRDA_DEBUG(1, "%s()\n", __FUNCTION__); |
| 104 | |
| 105 | /* Lock the port that we need */ |
| 106 | if (!request_region(iobase, IO_EXTENT, driver_name)) { |
| 107 | IRDA_DEBUG(0, "%s(), can't get iobase of 0x%03x\n", |
| 108 | __FUNCTION__, iobase); |
| 109 | goto err_out1; |
| 110 | } |
| 111 | |
| 112 | /* |
| 113 | * Allocate new instance of the driver |
| 114 | */ |
| 115 | dev = alloc_irdadev(sizeof(struct irport_cb)); |
| 116 | if (!dev) { |
| 117 | IRDA_ERROR("%s(), can't allocate memory for " |
| 118 | "irda device!\n", __FUNCTION__); |
| 119 | goto err_out2; |
| 120 | } |
| 121 | |
| 122 | self = dev->priv; |
| 123 | spin_lock_init(&self->lock); |
| 124 | |
| 125 | /* Need to store self somewhere */ |
| 126 | dev_self[i] = self; |
| 127 | self->priv = self; |
| 128 | self->index = i; |
| 129 | |
| 130 | /* Initialize IO */ |
| 131 | self->io.sir_base = iobase; |
| 132 | self->io.sir_ext = IO_EXTENT; |
| 133 | self->io.irq = irq; |
| 134 | self->io.fifo_size = 16; /* 16550A and compatible */ |
| 135 | |
| 136 | /* Initialize QoS for this device */ |
| 137 | irda_init_max_qos_capabilies(&self->qos); |
| 138 | |
| 139 | self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600| |
| 140 | IR_115200; |
| 141 | |
| 142 | self->qos.min_turn_time.bits = qos_mtt_bits; |
| 143 | irda_qos_bits_to_value(&self->qos); |
| 144 | |
| 145 | /* Bootstrap ZeroCopy Rx */ |
| 146 | self->rx_buff.truesize = IRDA_SKB_MAX_MTU; |
| 147 | self->rx_buff.skb = __dev_alloc_skb(self->rx_buff.truesize, |
| 148 | GFP_KERNEL); |
| 149 | if (self->rx_buff.skb == NULL) { |
| 150 | IRDA_ERROR("%s(), can't allocate memory for " |
| 151 | "receive buffer!\n", __FUNCTION__); |
| 152 | goto err_out3; |
| 153 | } |
| 154 | skb_reserve(self->rx_buff.skb, 1); |
| 155 | self->rx_buff.head = self->rx_buff.skb->data; |
| 156 | /* No need to memset the buffer, unless you are really pedantic */ |
| 157 | |
| 158 | /* Finish setup the Rx buffer descriptor */ |
| 159 | self->rx_buff.in_frame = FALSE; |
| 160 | self->rx_buff.state = OUTSIDE_FRAME; |
| 161 | self->rx_buff.data = self->rx_buff.head; |
| 162 | |
| 163 | /* Specify how much memory we want */ |
| 164 | self->tx_buff.truesize = 4000; |
| 165 | |
| 166 | /* Allocate memory if needed */ |
| 167 | if (self->tx_buff.truesize > 0) { |
| 168 | self->tx_buff.head = (__u8 *) kmalloc(self->tx_buff.truesize, |
| 169 | GFP_KERNEL); |
| 170 | if (self->tx_buff.head == NULL) { |
| 171 | IRDA_ERROR("%s(), can't allocate memory for " |
| 172 | "transmit buffer!\n", __FUNCTION__); |
| 173 | goto err_out4; |
| 174 | } |
| 175 | memset(self->tx_buff.head, 0, self->tx_buff.truesize); |
| 176 | } |
| 177 | self->tx_buff.data = self->tx_buff.head; |
| 178 | |
| 179 | self->netdev = dev; |
| 180 | /* Keep track of module usage */ |
| 181 | SET_MODULE_OWNER(dev); |
| 182 | |
| 183 | /* May be overridden by piggyback drivers */ |
| 184 | self->interrupt = irport_interrupt; |
| 185 | self->change_speed = irport_change_speed; |
| 186 | |
| 187 | /* Override the network functions we need to use */ |
| 188 | dev->hard_start_xmit = irport_hard_xmit; |
| 189 | dev->tx_timeout = irport_timeout; |
| 190 | dev->watchdog_timeo = HZ; /* Allow time enough for speed change */ |
| 191 | dev->open = irport_net_open; |
| 192 | dev->stop = irport_net_close; |
| 193 | dev->get_stats = irport_net_get_stats; |
| 194 | dev->do_ioctl = irport_net_ioctl; |
| 195 | |
| 196 | /* Make ifconfig display some details */ |
| 197 | dev->base_addr = iobase; |
| 198 | dev->irq = irq; |
| 199 | |
| 200 | if (register_netdev(dev)) { |
| 201 | IRDA_ERROR("%s(), register_netdev() failed!\n", __FUNCTION__); |
| 202 | goto err_out5; |
| 203 | } |
| 204 | IRDA_MESSAGE("IrDA: Registered device %s (irport io=0x%X irq=%d)\n", |
| 205 | dev->name, iobase, irq); |
| 206 | |
| 207 | return self; |
| 208 | err_out5: |
| 209 | kfree(self->tx_buff.head); |
| 210 | err_out4: |
| 211 | kfree_skb(self->rx_buff.skb); |
| 212 | err_out3: |
| 213 | free_netdev(dev); |
| 214 | dev_self[i] = NULL; |
| 215 | err_out2: |
| 216 | release_region(iobase, IO_EXTENT); |
| 217 | err_out1: |
| 218 | return NULL; |
| 219 | } |
| 220 | |
| 221 | static int irport_close(struct irport_cb *self) |
| 222 | { |
| 223 | IRDA_ASSERT(self != NULL, return -1;); |
| 224 | |
| 225 | /* We are not using any dongle anymore! */ |
| 226 | if (self->dongle) |
| 227 | irda_device_dongle_cleanup(self->dongle); |
| 228 | self->dongle = NULL; |
| 229 | |
| 230 | /* Remove netdevice */ |
| 231 | unregister_netdev(self->netdev); |
| 232 | |
| 233 | /* Release the IO-port that this driver is using */ |
| 234 | IRDA_DEBUG(0 , "%s(), Releasing Region %03x\n", |
| 235 | __FUNCTION__, self->io.sir_base); |
| 236 | release_region(self->io.sir_base, self->io.sir_ext); |
| 237 | |
Jesper Juhl | b4558ea | 2005-10-28 16:53:13 -0400 | [diff] [blame] | 238 | kfree(self->tx_buff.head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | |
| 240 | if (self->rx_buff.skb) |
| 241 | kfree_skb(self->rx_buff.skb); |
| 242 | self->rx_buff.skb = NULL; |
| 243 | |
| 244 | /* Remove ourselves */ |
| 245 | dev_self[self->index] = NULL; |
| 246 | free_netdev(self->netdev); |
| 247 | |
| 248 | return 0; |
| 249 | } |
| 250 | |
| 251 | static void irport_stop(struct irport_cb *self) |
| 252 | { |
| 253 | int iobase; |
| 254 | |
| 255 | iobase = self->io.sir_base; |
| 256 | |
| 257 | /* We can't lock, we may be called from a FIR driver - Jean II */ |
| 258 | |
| 259 | /* We are not transmitting any more */ |
| 260 | self->transmitting = 0; |
| 261 | |
| 262 | /* Reset UART */ |
| 263 | outb(0, iobase+UART_MCR); |
| 264 | |
| 265 | /* Turn off interrupts */ |
| 266 | outb(0, iobase+UART_IER); |
| 267 | } |
| 268 | |
| 269 | static void irport_start(struct irport_cb *self) |
| 270 | { |
| 271 | int iobase; |
| 272 | |
| 273 | iobase = self->io.sir_base; |
| 274 | |
| 275 | irport_stop(self); |
| 276 | |
| 277 | /* We can't lock, we may be called from a FIR driver - Jean II */ |
| 278 | |
| 279 | /* Initialize UART */ |
| 280 | outb(UART_LCR_WLEN8, iobase+UART_LCR); /* Reset DLAB */ |
| 281 | outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase+UART_MCR); |
| 282 | |
| 283 | /* Turn on interrups */ |
| 284 | outb(UART_IER_RLSI | UART_IER_RDI |UART_IER_THRI, iobase+UART_IER); |
| 285 | } |
| 286 | |
| 287 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | * Function irport_get_fcr (speed) |
| 289 | * |
| 290 | * Compute value of fcr |
| 291 | * |
| 292 | */ |
| 293 | static inline unsigned int irport_get_fcr(__u32 speed) |
| 294 | { |
| 295 | unsigned int fcr; /* FIFO control reg */ |
| 296 | |
| 297 | /* Enable fifos */ |
| 298 | fcr = UART_FCR_ENABLE_FIFO; |
| 299 | |
| 300 | /* |
| 301 | * Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and |
| 302 | * almost 1,7 ms at 19200 bps. At speeds above that we can just forget |
| 303 | * about this timeout since it will always be fast enough. |
| 304 | */ |
| 305 | if (speed < 38400) |
| 306 | fcr |= UART_FCR_TRIGGER_1; |
| 307 | else |
| 308 | //fcr |= UART_FCR_TRIGGER_14; |
| 309 | fcr |= UART_FCR_TRIGGER_8; |
| 310 | |
| 311 | return(fcr); |
| 312 | } |
| 313 | |
| 314 | /* |
| 315 | * Function irport_change_speed (self, speed) |
| 316 | * |
| 317 | * Set speed of IrDA port to specified baudrate |
| 318 | * |
| 319 | * This function should be called with irq off and spin-lock. |
| 320 | */ |
| 321 | static void irport_change_speed(void *priv, __u32 speed) |
| 322 | { |
| 323 | struct irport_cb *self = (struct irport_cb *) priv; |
| 324 | int iobase; |
| 325 | unsigned int fcr; /* FIFO control reg */ |
| 326 | unsigned int lcr; /* Line control reg */ |
| 327 | int divisor; |
| 328 | |
| 329 | IRDA_ASSERT(self != NULL, return;); |
| 330 | IRDA_ASSERT(speed != 0, return;); |
| 331 | |
| 332 | IRDA_DEBUG(1, "%s(), Setting speed to: %d - iobase=%#x\n", |
| 333 | __FUNCTION__, speed, self->io.sir_base); |
| 334 | |
| 335 | /* We can't lock, we may be called from a FIR driver - Jean II */ |
| 336 | |
| 337 | iobase = self->io.sir_base; |
| 338 | |
| 339 | /* Update accounting for new speed */ |
| 340 | self->io.speed = speed; |
| 341 | |
| 342 | /* Turn off interrupts */ |
| 343 | outb(0, iobase+UART_IER); |
| 344 | |
| 345 | divisor = SPEED_MAX/speed; |
| 346 | |
| 347 | /* Get proper fifo configuration */ |
| 348 | fcr = irport_get_fcr(speed); |
| 349 | |
| 350 | /* IrDA ports use 8N1 */ |
| 351 | lcr = UART_LCR_WLEN8; |
| 352 | |
| 353 | outb(UART_LCR_DLAB | lcr, iobase+UART_LCR); /* Set DLAB */ |
| 354 | outb(divisor & 0xff, iobase+UART_DLL); /* Set speed */ |
| 355 | outb(divisor >> 8, iobase+UART_DLM); |
| 356 | outb(lcr, iobase+UART_LCR); /* Set 8N1 */ |
| 357 | outb(fcr, iobase+UART_FCR); /* Enable FIFO's */ |
| 358 | |
| 359 | /* Turn on interrups */ |
| 360 | /* This will generate a fatal interrupt storm. |
| 361 | * People calling us will do that properly - Jean II */ |
| 362 | //outb(/*UART_IER_RLSI|*/UART_IER_RDI/*|UART_IER_THRI*/, iobase+UART_IER); |
| 363 | } |
| 364 | |
| 365 | /* |
| 366 | * Function __irport_change_speed (instance, state, param) |
| 367 | * |
| 368 | * State machine for changing speed of the device. We do it this way since |
| 369 | * we cannot use schedule_timeout() when we are in interrupt context |
| 370 | * |
| 371 | */ |
Adrian Bunk | e7c368b | 2006-01-09 20:54:00 -0800 | [diff] [blame^] | 372 | static int __irport_change_speed(struct irda_task *task) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | { |
| 374 | struct irport_cb *self; |
| 375 | __u32 speed = (__u32) task->param; |
| 376 | unsigned long flags = 0; |
| 377 | int wasunlocked = 0; |
| 378 | int ret = 0; |
| 379 | |
| 380 | IRDA_DEBUG(2, "%s(), <%ld>\n", __FUNCTION__, jiffies); |
| 381 | |
| 382 | self = (struct irport_cb *) task->instance; |
| 383 | |
| 384 | IRDA_ASSERT(self != NULL, return -1;); |
| 385 | |
| 386 | /* Locking notes : this function may be called from irq context with |
| 387 | * spinlock, via irport_write_wakeup(), or from non-interrupt without |
| 388 | * spinlock (from the task timer). Yuck ! |
| 389 | * This is ugly, and unsafe is the spinlock is not already aquired. |
| 390 | * This will be fixed when irda-task get rewritten. |
| 391 | * Jean II */ |
| 392 | if (!spin_is_locked(&self->lock)) { |
| 393 | spin_lock_irqsave(&self->lock, flags); |
| 394 | wasunlocked = 1; |
| 395 | } |
| 396 | |
| 397 | switch (task->state) { |
| 398 | case IRDA_TASK_INIT: |
| 399 | case IRDA_TASK_WAIT: |
| 400 | /* Are we ready to change speed yet? */ |
| 401 | if (self->tx_buff.len > 0) { |
| 402 | task->state = IRDA_TASK_WAIT; |
| 403 | |
| 404 | /* Try again later */ |
| 405 | ret = msecs_to_jiffies(20); |
| 406 | break; |
| 407 | } |
| 408 | |
| 409 | if (self->dongle) |
| 410 | irda_task_next_state(task, IRDA_TASK_CHILD_INIT); |
| 411 | else |
| 412 | irda_task_next_state(task, IRDA_TASK_CHILD_DONE); |
| 413 | break; |
| 414 | case IRDA_TASK_CHILD_INIT: |
| 415 | /* Go to default speed */ |
| 416 | self->change_speed(self->priv, 9600); |
| 417 | |
| 418 | /* Change speed of dongle */ |
| 419 | if (irda_task_execute(self->dongle, |
| 420 | self->dongle->issue->change_speed, |
| 421 | NULL, task, (void *) speed)) |
| 422 | { |
| 423 | /* Dongle need more time to change its speed */ |
| 424 | irda_task_next_state(task, IRDA_TASK_CHILD_WAIT); |
| 425 | |
| 426 | /* Give dongle 1 sec to finish */ |
| 427 | ret = msecs_to_jiffies(1000); |
| 428 | } else |
| 429 | /* Child finished immediately */ |
| 430 | irda_task_next_state(task, IRDA_TASK_CHILD_DONE); |
| 431 | break; |
| 432 | case IRDA_TASK_CHILD_WAIT: |
| 433 | IRDA_WARNING("%s(), changing speed of dongle timed out!\n", __FUNCTION__); |
| 434 | ret = -1; |
| 435 | break; |
| 436 | case IRDA_TASK_CHILD_DONE: |
| 437 | /* Finally we are ready to change the speed */ |
| 438 | self->change_speed(self->priv, speed); |
| 439 | |
| 440 | irda_task_next_state(task, IRDA_TASK_DONE); |
| 441 | break; |
| 442 | default: |
| 443 | IRDA_ERROR("%s(), unknown state %d\n", |
| 444 | __FUNCTION__, task->state); |
| 445 | irda_task_next_state(task, IRDA_TASK_DONE); |
| 446 | ret = -1; |
| 447 | break; |
| 448 | } |
| 449 | /* Put stuff in the state we found them - Jean II */ |
| 450 | if(wasunlocked) { |
| 451 | spin_unlock_irqrestore(&self->lock, flags); |
| 452 | } |
| 453 | |
| 454 | return ret; |
| 455 | } |
| 456 | |
| 457 | /* |
| 458 | * Function irport_change_speed_complete (task) |
| 459 | * |
| 460 | * Called when the change speed operation completes |
| 461 | * |
| 462 | */ |
| 463 | static int irport_change_speed_complete(struct irda_task *task) |
| 464 | { |
| 465 | struct irport_cb *self; |
| 466 | |
| 467 | IRDA_DEBUG(1, "%s()\n", __FUNCTION__); |
| 468 | |
| 469 | self = (struct irport_cb *) task->instance; |
| 470 | |
| 471 | IRDA_ASSERT(self != NULL, return -1;); |
| 472 | IRDA_ASSERT(self->netdev != NULL, return -1;); |
| 473 | |
| 474 | /* Finished changing speed, so we are not busy any longer */ |
| 475 | /* Signal network layer so it can try to send the frame */ |
| 476 | |
| 477 | netif_wake_queue(self->netdev); |
| 478 | |
| 479 | return 0; |
| 480 | } |
| 481 | |
| 482 | /* |
| 483 | * Function irport_timeout (struct net_device *dev) |
| 484 | * |
| 485 | * The networking layer thinks we timed out. |
| 486 | * |
| 487 | */ |
| 488 | |
| 489 | static void irport_timeout(struct net_device *dev) |
| 490 | { |
| 491 | struct irport_cb *self; |
| 492 | int iobase; |
| 493 | int iir, lsr; |
| 494 | unsigned long flags; |
| 495 | |
| 496 | self = (struct irport_cb *) dev->priv; |
| 497 | IRDA_ASSERT(self != NULL, return;); |
| 498 | iobase = self->io.sir_base; |
| 499 | |
| 500 | IRDA_WARNING("%s: transmit timed out, jiffies = %ld, trans_start = %ld\n", |
| 501 | dev->name, jiffies, dev->trans_start); |
| 502 | spin_lock_irqsave(&self->lock, flags); |
| 503 | |
| 504 | /* Debug what's happening... */ |
| 505 | |
| 506 | /* Get interrupt status */ |
| 507 | lsr = inb(iobase+UART_LSR); |
| 508 | /* Read interrupt register */ |
| 509 | iir = inb(iobase+UART_IIR); |
| 510 | IRDA_DEBUG(0, "%s(), iir=%02x, lsr=%02x, iobase=%#x\n", |
| 511 | __FUNCTION__, iir, lsr, iobase); |
| 512 | |
| 513 | IRDA_DEBUG(0, "%s(), transmitting=%d, remain=%d, done=%d\n", |
| 514 | __FUNCTION__, self->transmitting, self->tx_buff.len, |
| 515 | self->tx_buff.data - self->tx_buff.head); |
| 516 | |
| 517 | /* Now, restart the port */ |
| 518 | irport_start(self); |
| 519 | self->change_speed(self->priv, self->io.speed); |
| 520 | /* This will re-enable irqs */ |
| 521 | outb(/*UART_IER_RLSI|*/UART_IER_RDI/*|UART_IER_THRI*/, iobase+UART_IER); |
| 522 | dev->trans_start = jiffies; |
| 523 | spin_unlock_irqrestore(&self->lock, flags); |
| 524 | |
| 525 | netif_wake_queue(dev); |
| 526 | } |
| 527 | |
| 528 | /* |
| 529 | * Function irport_wait_hw_transmitter_finish () |
| 530 | * |
| 531 | * Wait for the real end of HW transmission |
| 532 | * |
| 533 | * The UART is a strict FIFO, and we get called only when we have finished |
| 534 | * pushing data to the FIFO, so the maximum amount of time we must wait |
| 535 | * is only for the FIFO to drain out. |
| 536 | * |
| 537 | * We use a simple calibrated loop. We may need to adjust the loop |
| 538 | * delay (udelay) to balance I/O traffic and latency. And we also need to |
| 539 | * adjust the maximum timeout. |
| 540 | * It would probably be better to wait for the proper interrupt, |
| 541 | * but it doesn't seem to be available. |
| 542 | * |
| 543 | * We can't use jiffies or kernel timers because : |
| 544 | * 1) We are called from the interrupt handler, which disable softirqs, |
| 545 | * so jiffies won't be increased |
| 546 | * 2) Jiffies granularity is usually very coarse (10ms), and we don't |
| 547 | * want to wait that long to detect stuck hardware. |
| 548 | * Jean II |
| 549 | */ |
| 550 | |
| 551 | static void irport_wait_hw_transmitter_finish(struct irport_cb *self) |
| 552 | { |
| 553 | int iobase; |
| 554 | int count = 1000; /* 1 ms */ |
| 555 | |
| 556 | iobase = self->io.sir_base; |
| 557 | |
| 558 | /* Calibrated busy loop */ |
| 559 | while((count-- > 0) && !(inb(iobase+UART_LSR) & UART_LSR_TEMT)) |
| 560 | udelay(1); |
| 561 | |
| 562 | if(count == 0) |
| 563 | IRDA_DEBUG(0, "%s(): stuck transmitter\n", __FUNCTION__); |
| 564 | } |
| 565 | |
| 566 | /* |
| 567 | * Function irport_hard_start_xmit (struct sk_buff *skb, struct net_device *dev) |
| 568 | * |
| 569 | * Transmits the current frame until FIFO is full, then |
| 570 | * waits until the next transmitt interrupt, and continues until the |
| 571 | * frame is transmitted. |
| 572 | */ |
| 573 | static int irport_hard_xmit(struct sk_buff *skb, struct net_device *dev) |
| 574 | { |
| 575 | struct irport_cb *self; |
| 576 | unsigned long flags; |
| 577 | int iobase; |
| 578 | s32 speed; |
| 579 | |
| 580 | IRDA_DEBUG(1, "%s()\n", __FUNCTION__); |
| 581 | |
| 582 | IRDA_ASSERT(dev != NULL, return 0;); |
| 583 | |
| 584 | self = (struct irport_cb *) dev->priv; |
| 585 | IRDA_ASSERT(self != NULL, return 0;); |
| 586 | |
| 587 | iobase = self->io.sir_base; |
| 588 | |
| 589 | netif_stop_queue(dev); |
| 590 | |
| 591 | /* Make sure tests & speed change are atomic */ |
| 592 | spin_lock_irqsave(&self->lock, flags); |
| 593 | |
| 594 | /* Check if we need to change the speed */ |
| 595 | speed = irda_get_next_speed(skb); |
| 596 | if ((speed != self->io.speed) && (speed != -1)) { |
| 597 | /* Check for empty frame */ |
| 598 | if (!skb->len) { |
| 599 | /* |
| 600 | * We send frames one by one in SIR mode (no |
| 601 | * pipelining), so at this point, if we were sending |
| 602 | * a previous frame, we just received the interrupt |
| 603 | * telling us it is finished (UART_IIR_THRI). |
| 604 | * Therefore, waiting for the transmitter to really |
| 605 | * finish draining the fifo won't take too long. |
| 606 | * And the interrupt handler is not expected to run. |
| 607 | * - Jean II */ |
| 608 | irport_wait_hw_transmitter_finish(self); |
| 609 | /* Better go there already locked - Jean II */ |
| 610 | irda_task_execute(self, __irport_change_speed, |
| 611 | irport_change_speed_complete, |
| 612 | NULL, (void *) speed); |
| 613 | dev->trans_start = jiffies; |
| 614 | spin_unlock_irqrestore(&self->lock, flags); |
| 615 | dev_kfree_skb(skb); |
| 616 | return 0; |
| 617 | } else |
| 618 | self->new_speed = speed; |
| 619 | } |
| 620 | |
| 621 | /* Init tx buffer */ |
| 622 | self->tx_buff.data = self->tx_buff.head; |
| 623 | |
| 624 | /* Copy skb to tx_buff while wrapping, stuffing and making CRC */ |
| 625 | self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data, |
| 626 | self->tx_buff.truesize); |
| 627 | |
| 628 | self->stats.tx_bytes += self->tx_buff.len; |
| 629 | |
| 630 | /* We are transmitting */ |
| 631 | self->transmitting = 1; |
| 632 | |
| 633 | /* Turn on transmit finished interrupt. Will fire immediately! */ |
| 634 | outb(UART_IER_THRI, iobase+UART_IER); |
| 635 | |
| 636 | dev->trans_start = jiffies; |
| 637 | spin_unlock_irqrestore(&self->lock, flags); |
| 638 | |
| 639 | dev_kfree_skb(skb); |
| 640 | |
| 641 | return 0; |
| 642 | } |
| 643 | |
| 644 | /* |
| 645 | * Function irport_write (driver) |
| 646 | * |
| 647 | * Fill Tx FIFO with transmit data |
| 648 | * |
| 649 | * Called only from irport_write_wakeup() |
| 650 | */ |
| 651 | static inline int irport_write(int iobase, int fifo_size, __u8 *buf, int len) |
| 652 | { |
| 653 | int actual = 0; |
| 654 | |
| 655 | /* Fill FIFO with current frame */ |
| 656 | while ((actual < fifo_size) && (actual < len)) { |
| 657 | /* Transmit next byte */ |
| 658 | outb(buf[actual], iobase+UART_TX); |
| 659 | |
| 660 | actual++; |
| 661 | } |
| 662 | |
| 663 | return actual; |
| 664 | } |
| 665 | |
| 666 | /* |
| 667 | * Function irport_write_wakeup (tty) |
| 668 | * |
| 669 | * Called by the driver when there's room for more data. If we have |
| 670 | * more packets to send, we send them here. |
| 671 | * |
| 672 | * Called only from irport_interrupt() |
| 673 | * Make sure this function is *not* called while we are receiving, |
| 674 | * otherwise we will reset fifo and loose data :-( |
| 675 | */ |
| 676 | static inline void irport_write_wakeup(struct irport_cb *self) |
| 677 | { |
| 678 | int actual = 0; |
| 679 | int iobase; |
| 680 | unsigned int fcr; |
| 681 | |
| 682 | IRDA_ASSERT(self != NULL, return;); |
| 683 | |
| 684 | IRDA_DEBUG(4, "%s()\n", __FUNCTION__); |
| 685 | |
| 686 | iobase = self->io.sir_base; |
| 687 | |
| 688 | /* Finished with frame? */ |
| 689 | if (self->tx_buff.len > 0) { |
| 690 | /* Write data left in transmit buffer */ |
| 691 | actual = irport_write(iobase, self->io.fifo_size, |
| 692 | self->tx_buff.data, self->tx_buff.len); |
| 693 | self->tx_buff.data += actual; |
| 694 | self->tx_buff.len -= actual; |
| 695 | } else { |
| 696 | /* |
| 697 | * Now serial buffer is almost free & we can start |
| 698 | * transmission of another packet. But first we must check |
| 699 | * if we need to change the speed of the hardware |
| 700 | */ |
| 701 | if (self->new_speed) { |
| 702 | irport_wait_hw_transmitter_finish(self); |
| 703 | irda_task_execute(self, __irport_change_speed, |
| 704 | irport_change_speed_complete, |
| 705 | NULL, (void *) self->new_speed); |
| 706 | self->new_speed = 0; |
| 707 | } else { |
| 708 | /* Tell network layer that we want more frames */ |
| 709 | netif_wake_queue(self->netdev); |
| 710 | } |
| 711 | self->stats.tx_packets++; |
| 712 | |
| 713 | /* |
| 714 | * Reset Rx FIFO to make sure that all reflected transmit data |
| 715 | * is discarded. This is needed for half duplex operation |
| 716 | */ |
| 717 | fcr = irport_get_fcr(self->io.speed); |
| 718 | fcr |= UART_FCR_CLEAR_RCVR; |
| 719 | outb(fcr, iobase+UART_FCR); |
| 720 | |
| 721 | /* Finished transmitting */ |
| 722 | self->transmitting = 0; |
| 723 | |
| 724 | /* Turn on receive interrupts */ |
| 725 | outb(UART_IER_RDI, iobase+UART_IER); |
| 726 | |
| 727 | IRDA_DEBUG(1, "%s() : finished Tx\n", __FUNCTION__); |
| 728 | } |
| 729 | } |
| 730 | |
| 731 | /* |
| 732 | * Function irport_receive (self) |
| 733 | * |
| 734 | * Receive one frame from the infrared port |
| 735 | * |
| 736 | * Called only from irport_interrupt() |
| 737 | */ |
| 738 | static inline void irport_receive(struct irport_cb *self) |
| 739 | { |
| 740 | int boguscount = 0; |
| 741 | int iobase; |
| 742 | |
| 743 | IRDA_ASSERT(self != NULL, return;); |
| 744 | |
| 745 | iobase = self->io.sir_base; |
| 746 | |
| 747 | /* |
| 748 | * Receive all characters in Rx FIFO, unwrap and unstuff them. |
| 749 | * async_unwrap_char will deliver all found frames |
| 750 | */ |
| 751 | do { |
| 752 | async_unwrap_char(self->netdev, &self->stats, &self->rx_buff, |
| 753 | inb(iobase+UART_RX)); |
| 754 | |
| 755 | /* Make sure we don't stay here too long */ |
| 756 | if (boguscount++ > 32) { |
| 757 | IRDA_DEBUG(2,"%s(), breaking!\n", __FUNCTION__); |
| 758 | break; |
| 759 | } |
| 760 | } while (inb(iobase+UART_LSR) & UART_LSR_DR); |
| 761 | } |
| 762 | |
| 763 | /* |
| 764 | * Function irport_interrupt (irq, dev_id, regs) |
| 765 | * |
| 766 | * Interrupt handler |
| 767 | */ |
| 768 | static irqreturn_t irport_interrupt(int irq, void *dev_id, |
| 769 | struct pt_regs *regs) |
| 770 | { |
| 771 | struct net_device *dev = (struct net_device *) dev_id; |
| 772 | struct irport_cb *self; |
| 773 | int boguscount = 0; |
| 774 | int iobase; |
| 775 | int iir, lsr; |
| 776 | int handled = 0; |
| 777 | |
| 778 | if (!dev) { |
| 779 | IRDA_WARNING("%s() irq %d for unknown device.\n", __FUNCTION__, irq); |
| 780 | return IRQ_NONE; |
| 781 | } |
| 782 | self = (struct irport_cb *) dev->priv; |
| 783 | |
| 784 | spin_lock(&self->lock); |
| 785 | |
| 786 | iobase = self->io.sir_base; |
| 787 | |
| 788 | /* Cut'n'paste interrupt routine from serial.c |
| 789 | * This version try to minimise latency and I/O operations. |
| 790 | * Simplified and modified to enforce half duplex operation. |
| 791 | * - Jean II */ |
| 792 | |
| 793 | /* Check status even is iir reg is cleared, more robust and |
| 794 | * eliminate a read on the I/O bus - Jean II */ |
| 795 | do { |
| 796 | /* Get interrupt status ; Clear interrupt */ |
| 797 | lsr = inb(iobase+UART_LSR); |
| 798 | |
| 799 | /* Are we receiving or transmitting ? */ |
| 800 | if(!self->transmitting) { |
| 801 | /* Received something ? */ |
| 802 | if (lsr & UART_LSR_DR) |
| 803 | irport_receive(self); |
| 804 | } else { |
| 805 | /* Room in Tx fifo ? */ |
| 806 | if (lsr & (UART_LSR_THRE | UART_LSR_TEMT)) |
| 807 | irport_write_wakeup(self); |
| 808 | } |
| 809 | |
| 810 | /* A bit hackish, but working as expected... Jean II */ |
| 811 | if(lsr & (UART_LSR_THRE | UART_LSR_TEMT | UART_LSR_DR)) |
| 812 | handled = 1; |
| 813 | |
| 814 | /* Make sure we don't stay here to long */ |
| 815 | if (boguscount++ > 10) { |
| 816 | IRDA_WARNING("%s() irq handler looping : lsr=%02x\n", |
| 817 | __FUNCTION__, lsr); |
| 818 | break; |
| 819 | } |
| 820 | |
| 821 | /* Read interrupt register */ |
| 822 | iir = inb(iobase+UART_IIR); |
| 823 | |
| 824 | /* Enable this debug only when no other options and at low |
| 825 | * bit rates, otherwise it may cause Rx overruns (lsr=63). |
| 826 | * - Jean II */ |
| 827 | IRDA_DEBUG(6, "%s(), iir=%02x, lsr=%02x, iobase=%#x\n", |
| 828 | __FUNCTION__, iir, lsr, iobase); |
| 829 | |
| 830 | /* As long as interrupt pending... */ |
| 831 | } while ((iir & UART_IIR_NO_INT) == 0); |
| 832 | |
| 833 | spin_unlock(&self->lock); |
| 834 | return IRQ_RETVAL(handled); |
| 835 | } |
| 836 | |
| 837 | /* |
| 838 | * Function irport_net_open (dev) |
| 839 | * |
| 840 | * Network device is taken up. Usually this is done by "ifconfig irda0 up" |
| 841 | * |
| 842 | */ |
| 843 | static int irport_net_open(struct net_device *dev) |
| 844 | { |
| 845 | struct irport_cb *self; |
| 846 | int iobase; |
| 847 | char hwname[16]; |
| 848 | unsigned long flags; |
| 849 | |
| 850 | IRDA_DEBUG(2, "%s()\n", __FUNCTION__); |
| 851 | |
| 852 | IRDA_ASSERT(dev != NULL, return -1;); |
| 853 | self = (struct irport_cb *) dev->priv; |
| 854 | |
| 855 | iobase = self->io.sir_base; |
| 856 | |
| 857 | if (request_irq(self->io.irq, self->interrupt, 0, dev->name, |
| 858 | (void *) dev)) { |
| 859 | IRDA_DEBUG(0, "%s(), unable to allocate irq=%d\n", |
| 860 | __FUNCTION__, self->io.irq); |
| 861 | return -EAGAIN; |
| 862 | } |
| 863 | |
| 864 | spin_lock_irqsave(&self->lock, flags); |
| 865 | /* Init uart */ |
| 866 | irport_start(self); |
| 867 | /* Set 9600 bauds per default, including at the dongle */ |
| 868 | irda_task_execute(self, __irport_change_speed, |
| 869 | irport_change_speed_complete, |
| 870 | NULL, (void *) 9600); |
| 871 | spin_unlock_irqrestore(&self->lock, flags); |
| 872 | |
| 873 | |
| 874 | /* Give self a hardware name */ |
| 875 | sprintf(hwname, "SIR @ 0x%03x", self->io.sir_base); |
| 876 | |
| 877 | /* |
| 878 | * Open new IrLAP layer instance, now that everything should be |
| 879 | * initialized properly |
| 880 | */ |
| 881 | self->irlap = irlap_open(dev, &self->qos, hwname); |
| 882 | |
| 883 | /* Ready to play! */ |
| 884 | |
| 885 | netif_start_queue(dev); |
| 886 | |
| 887 | return 0; |
| 888 | } |
| 889 | |
| 890 | /* |
| 891 | * Function irport_net_close (self) |
| 892 | * |
| 893 | * Network device is taken down. Usually this is done by |
| 894 | * "ifconfig irda0 down" |
| 895 | */ |
| 896 | static int irport_net_close(struct net_device *dev) |
| 897 | { |
| 898 | struct irport_cb *self; |
| 899 | int iobase; |
| 900 | unsigned long flags; |
| 901 | |
| 902 | IRDA_DEBUG(4, "%s()\n", __FUNCTION__); |
| 903 | |
| 904 | IRDA_ASSERT(dev != NULL, return -1;); |
| 905 | self = (struct irport_cb *) dev->priv; |
| 906 | |
| 907 | IRDA_ASSERT(self != NULL, return -1;); |
| 908 | |
| 909 | iobase = self->io.sir_base; |
| 910 | |
| 911 | /* Stop device */ |
| 912 | netif_stop_queue(dev); |
| 913 | |
| 914 | /* Stop and remove instance of IrLAP */ |
| 915 | if (self->irlap) |
| 916 | irlap_close(self->irlap); |
| 917 | self->irlap = NULL; |
| 918 | |
| 919 | spin_lock_irqsave(&self->lock, flags); |
| 920 | irport_stop(self); |
| 921 | spin_unlock_irqrestore(&self->lock, flags); |
| 922 | |
| 923 | free_irq(self->io.irq, dev); |
| 924 | |
| 925 | return 0; |
| 926 | } |
| 927 | |
| 928 | /* |
| 929 | * Function irport_is_receiving (self) |
| 930 | * |
| 931 | * Returns true is we are currently receiving data |
| 932 | * |
| 933 | */ |
| 934 | static inline int irport_is_receiving(struct irport_cb *self) |
| 935 | { |
| 936 | return (self->rx_buff.state != OUTSIDE_FRAME); |
| 937 | } |
| 938 | |
| 939 | /* |
| 940 | * Function irport_set_dtr_rts (tty, dtr, rts) |
| 941 | * |
| 942 | * This function can be used by dongles etc. to set or reset the status |
| 943 | * of the dtr and rts lines |
| 944 | */ |
| 945 | static int irport_set_dtr_rts(struct net_device *dev, int dtr, int rts) |
| 946 | { |
| 947 | struct irport_cb *self = dev->priv; |
| 948 | int iobase; |
| 949 | |
| 950 | IRDA_ASSERT(self != NULL, return -1;); |
| 951 | |
| 952 | iobase = self->io.sir_base; |
| 953 | |
| 954 | if (dtr) |
| 955 | dtr = UART_MCR_DTR; |
| 956 | if (rts) |
| 957 | rts = UART_MCR_RTS; |
| 958 | |
| 959 | outb(dtr|rts|UART_MCR_OUT2, iobase+UART_MCR); |
| 960 | |
| 961 | return 0; |
| 962 | } |
| 963 | |
| 964 | static int irport_raw_write(struct net_device *dev, __u8 *buf, int len) |
| 965 | { |
| 966 | struct irport_cb *self = (struct irport_cb *) dev->priv; |
| 967 | int actual = 0; |
| 968 | int iobase; |
| 969 | |
| 970 | IRDA_ASSERT(self != NULL, return -1;); |
| 971 | |
| 972 | iobase = self->io.sir_base; |
| 973 | |
| 974 | /* Tx FIFO should be empty! */ |
| 975 | if (!(inb(iobase+UART_LSR) & UART_LSR_THRE)) { |
| 976 | IRDA_DEBUG( 0, "%s(), failed, fifo not empty!\n", __FUNCTION__); |
| 977 | return -1; |
| 978 | } |
| 979 | |
| 980 | /* Fill FIFO with current frame */ |
| 981 | while (actual < len) { |
| 982 | /* Transmit next byte */ |
| 983 | outb(buf[actual], iobase+UART_TX); |
| 984 | actual++; |
| 985 | } |
| 986 | |
| 987 | return actual; |
| 988 | } |
| 989 | |
| 990 | /* |
| 991 | * Function irport_net_ioctl (dev, rq, cmd) |
| 992 | * |
| 993 | * Process IOCTL commands for this device |
| 994 | * |
| 995 | */ |
| 996 | static int irport_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) |
| 997 | { |
| 998 | struct if_irda_req *irq = (struct if_irda_req *) rq; |
| 999 | struct irport_cb *self; |
| 1000 | dongle_t *dongle; |
| 1001 | unsigned long flags; |
| 1002 | int ret = 0; |
| 1003 | |
| 1004 | IRDA_ASSERT(dev != NULL, return -1;); |
| 1005 | |
| 1006 | self = dev->priv; |
| 1007 | |
| 1008 | IRDA_ASSERT(self != NULL, return -1;); |
| 1009 | |
| 1010 | IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __FUNCTION__, dev->name, cmd); |
| 1011 | |
| 1012 | switch (cmd) { |
| 1013 | case SIOCSBANDWIDTH: /* Set bandwidth */ |
| 1014 | if (!capable(CAP_NET_ADMIN)) |
| 1015 | ret = -EPERM; |
| 1016 | else |
| 1017 | irda_task_execute(self, __irport_change_speed, NULL, |
| 1018 | NULL, (void *) irq->ifr_baudrate); |
| 1019 | break; |
| 1020 | case SIOCSDONGLE: /* Set dongle */ |
| 1021 | if (!capable(CAP_NET_ADMIN)) { |
| 1022 | ret = -EPERM; |
| 1023 | break; |
| 1024 | } |
| 1025 | |
| 1026 | /* Locking : |
| 1027 | * irda_device_dongle_init() can't be locked. |
| 1028 | * irda_task_execute() doesn't need to be locked. |
| 1029 | * Jean II |
| 1030 | */ |
| 1031 | |
| 1032 | /* Initialize dongle */ |
| 1033 | dongle = irda_device_dongle_init(dev, irq->ifr_dongle); |
| 1034 | if (!dongle) |
| 1035 | break; |
| 1036 | |
| 1037 | dongle->set_mode = NULL; |
| 1038 | dongle->read = NULL; |
| 1039 | dongle->write = irport_raw_write; |
| 1040 | dongle->set_dtr_rts = irport_set_dtr_rts; |
| 1041 | |
| 1042 | /* Now initialize the dongle! */ |
| 1043 | dongle->issue->open(dongle, &self->qos); |
| 1044 | |
| 1045 | /* Reset dongle */ |
| 1046 | irda_task_execute(dongle, dongle->issue->reset, NULL, NULL, |
| 1047 | NULL); |
| 1048 | |
| 1049 | /* Make dongle available to driver only now to avoid |
| 1050 | * race conditions - Jean II */ |
| 1051 | self->dongle = dongle; |
| 1052 | break; |
| 1053 | case SIOCSMEDIABUSY: /* Set media busy */ |
| 1054 | if (!capable(CAP_NET_ADMIN)) { |
| 1055 | ret = -EPERM; |
| 1056 | break; |
| 1057 | } |
| 1058 | |
| 1059 | irda_device_set_media_busy(self->netdev, TRUE); |
| 1060 | break; |
| 1061 | case SIOCGRECEIVING: /* Check if we are receiving right now */ |
| 1062 | irq->ifr_receiving = irport_is_receiving(self); |
| 1063 | break; |
| 1064 | case SIOCSDTRRTS: |
| 1065 | if (!capable(CAP_NET_ADMIN)) { |
| 1066 | ret = -EPERM; |
| 1067 | break; |
| 1068 | } |
| 1069 | |
| 1070 | /* No real need to lock... */ |
| 1071 | spin_lock_irqsave(&self->lock, flags); |
| 1072 | irport_set_dtr_rts(dev, irq->ifr_dtr, irq->ifr_rts); |
| 1073 | spin_unlock_irqrestore(&self->lock, flags); |
| 1074 | break; |
| 1075 | default: |
| 1076 | ret = -EOPNOTSUPP; |
| 1077 | } |
| 1078 | |
| 1079 | return ret; |
| 1080 | } |
| 1081 | |
| 1082 | static struct net_device_stats *irport_net_get_stats(struct net_device *dev) |
| 1083 | { |
| 1084 | struct irport_cb *self = (struct irport_cb *) dev->priv; |
| 1085 | |
| 1086 | return &self->stats; |
| 1087 | } |
| 1088 | |
| 1089 | static int __init irport_init(void) |
| 1090 | { |
| 1091 | int i; |
| 1092 | |
| 1093 | for (i=0; (io[i] < 2000) && (i < 4); i++) { |
| 1094 | if (irport_open(i, io[i], irq[i]) != NULL) |
| 1095 | return 0; |
| 1096 | } |
| 1097 | /* |
| 1098 | * Maybe something failed, but we can still be usable for FIR drivers |
| 1099 | */ |
| 1100 | return 0; |
| 1101 | } |
| 1102 | |
| 1103 | /* |
| 1104 | * Function irport_cleanup () |
| 1105 | * |
| 1106 | * Close all configured ports |
| 1107 | * |
| 1108 | */ |
| 1109 | static void __exit irport_cleanup(void) |
| 1110 | { |
| 1111 | int i; |
| 1112 | |
| 1113 | IRDA_DEBUG( 4, "%s()\n", __FUNCTION__); |
| 1114 | |
| 1115 | for (i=0; i < 4; i++) { |
| 1116 | if (dev_self[i]) |
| 1117 | irport_close(dev_self[i]); |
| 1118 | } |
| 1119 | } |
| 1120 | |
| 1121 | MODULE_PARM(io, "1-4i"); |
| 1122 | MODULE_PARM_DESC(io, "Base I/O addresses"); |
| 1123 | MODULE_PARM(irq, "1-4i"); |
| 1124 | MODULE_PARM_DESC(irq, "IRQ lines"); |
| 1125 | |
| 1126 | MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>"); |
| 1127 | MODULE_DESCRIPTION("Half duplex serial driver for IrDA SIR mode"); |
| 1128 | MODULE_LICENSE("GPL"); |
| 1129 | |
| 1130 | module_init(irport_init); |
| 1131 | module_exit(irport_cleanup); |
| 1132 | |