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Avoid beyond bounds copy while caching ACL
[zen-stable.git] / drivers / net / irda / ali-ircc.c
blob963067d3bda277b6acab90b838fa2d7b93c1ff7c
1 /*********************************************************************
2 *
3 * Filename: ali-ircc.h
4 * Version: 0.5
5 * Description: Driver for the ALI M1535D and M1543C FIR Controller
6 * Status: Experimental.
7 * Author: Benjamin Kong <benjamin_kong@ali.com.tw>
8 * Created at: 2000/10/16 03:46PM
9 * Modified at: 2001/1/3 02:55PM
10 * Modified by: Benjamin Kong <benjamin_kong@ali.com.tw>
11 * Modified at: 2003/11/6 and support for ALi south-bridge chipsets M1563
12 * Modified by: Clear Zhang <clear_zhang@ali.com.tw>
13 *
14 * Copyright (c) 2000 Benjamin Kong <benjamin_kong@ali.com.tw>
15 * All Rights Reserved
16 *
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License as
19 * published by the Free Software Foundation; either version 2 of
20 * the License, or (at your option) any later version.
21 *
22 ********************************************************************/
23
24 #include <linux/module.h>
25 #include <linux/gfp.h>
26
27 #include <linux/kernel.h>
28 #include <linux/types.h>
29 #include <linux/skbuff.h>
30 #include <linux/netdevice.h>
31 #include <linux/ioport.h>
32 #include <linux/delay.h>
33 #include <linux/init.h>
34 #include <linux/interrupt.h>
35 #include <linux/rtnetlink.h>
36 #include <linux/serial_reg.h>
37 #include <linux/dma-mapping.h>
38 #include <linux/platform_device.h>
39
40 #include <asm/io.h>
41 #include <asm/dma.h>
42 #include <asm/byteorder.h>
43
44 #include <net/irda/wrapper.h>
45 #include <net/irda/irda.h>
46 #include <net/irda/irda_device.h>
47
48 #include "ali-ircc.h"
49
50 #define CHIP_IO_EXTENT 8
51 #define BROKEN_DONGLE_ID
52
53 #define ALI_IRCC_DRIVER_NAME "ali-ircc"
54
55 /* Power Management */
56 static int ali_ircc_suspend(struct platform_device *dev, pm_message_t state);
57 static int ali_ircc_resume(struct platform_device *dev);
58
59 static struct platform_driver ali_ircc_driver = {
60 .suspend = ali_ircc_suspend,
61 .resume = ali_ircc_resume,
62 .driver = {
63 .name = ALI_IRCC_DRIVER_NAME,
64 .owner = THIS_MODULE,
65 },
66 };
67
68 /* Module parameters */
69 static int qos_mtt_bits = 0x07; /* 1 ms or more */
70
71 /* Use BIOS settions by default, but user may supply module parameters */
72 static unsigned int io[] = { ~0, ~0, ~0, ~0 };
73 static unsigned int irq[] = { 0, 0, 0, 0 };
74 static unsigned int dma[] = { 0, 0, 0, 0 };
75
76 static int ali_ircc_probe_53(ali_chip_t *chip, chipio_t *info);
77 static int ali_ircc_init_43(ali_chip_t *chip, chipio_t *info);
78 static int ali_ircc_init_53(ali_chip_t *chip, chipio_t *info);
79
80 /* These are the currently known ALi south-bridge chipsets, the only one difference
81 * is that M1543C doesn't support HP HDSL-3600
82 */
83 static ali_chip_t chips[] =
84 {
85 { "M1543", { 0x3f0, 0x370 }, 0x51, 0x23, 0x20, 0x43, ali_ircc_probe_53, ali_ircc_init_43 },
86 { "M1535", { 0x3f0, 0x370 }, 0x51, 0x23, 0x20, 0x53, ali_ircc_probe_53, ali_ircc_init_53 },
87 { "M1563", { 0x3f0, 0x370 }, 0x51, 0x23, 0x20, 0x63, ali_ircc_probe_53, ali_ircc_init_53 },
88 { NULL }
89 };
90
91 /* Max 4 instances for now */
92 static struct ali_ircc_cb *dev_self[] = { NULL, NULL, NULL, NULL };
93
94 /* Dongle Types */
95 static char *dongle_types[] = {
96 "TFDS6000",
97 "HP HSDL-3600",
98 "HP HSDL-1100",
99 "No dongle connected",
100 };
101
102 /* Some prototypes */
103 static int ali_ircc_open(int i, chipio_t *info);
104
105 static int ali_ircc_close(struct ali_ircc_cb *self);
106
107 static int ali_ircc_setup(chipio_t *info);
108 static int ali_ircc_is_receiving(struct ali_ircc_cb *self);
109 static int ali_ircc_net_open(struct net_device *dev);
110 static int ali_ircc_net_close(struct net_device *dev);
111 static int ali_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
112 static void ali_ircc_change_speed(struct ali_ircc_cb *self, __u32 baud);
113
114 /* SIR function */
115 static netdev_tx_t ali_ircc_sir_hard_xmit(struct sk_buff *skb,
116 struct net_device *dev);
117 static irqreturn_t ali_ircc_sir_interrupt(struct ali_ircc_cb *self);
118 static void ali_ircc_sir_receive(struct ali_ircc_cb *self);
119 static void ali_ircc_sir_write_wakeup(struct ali_ircc_cb *self);
120 static int ali_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len);
121 static void ali_ircc_sir_change_speed(struct ali_ircc_cb *priv, __u32 speed);
122
123 /* FIR function */
124 static netdev_tx_t ali_ircc_fir_hard_xmit(struct sk_buff *skb,
125 struct net_device *dev);
126 static void ali_ircc_fir_change_speed(struct ali_ircc_cb *priv, __u32 speed);
127 static irqreturn_t ali_ircc_fir_interrupt(struct ali_ircc_cb *self);
128 static int ali_ircc_dma_receive(struct ali_ircc_cb *self);
129 static int ali_ircc_dma_receive_complete(struct ali_ircc_cb *self);
130 static int ali_ircc_dma_xmit_complete(struct ali_ircc_cb *self);
131 static void ali_ircc_dma_xmit(struct ali_ircc_cb *self);
132
133 /* My Function */
134 static int ali_ircc_read_dongle_id (int i, chipio_t *info);
135 static void ali_ircc_change_dongle_speed(struct ali_ircc_cb *priv, int speed);
136
137 /* ALi chip function */
138 static void SIR2FIR(int iobase);
139 static void FIR2SIR(int iobase);
140 static void SetCOMInterrupts(struct ali_ircc_cb *self , unsigned char enable);
141
142 /*
143 * Function ali_ircc_init ()
144 *
145 * Initialize chip. Find out whay kinds of chips we are dealing with
146 * and their configuration registers address
147 */
148 static int __init ali_ircc_init(void)
149 {
150 ali_chip_t *chip;
151 chipio_t info;
152 int ret;
153 int cfg, cfg_base;
154 int reg, revision;
155 int i = 0;
156
157 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
158
159 ret = platform_driver_register(&ali_ircc_driver);
160 if (ret) {
161 IRDA_ERROR("%s, Can't register driver!\n",
162 ALI_IRCC_DRIVER_NAME);
163 return ret;
164 }
165
166 ret = -ENODEV;
167
168 /* Probe for all the ALi chipsets we know about */
169 for (chip= chips; chip->name; chip++, i++)
170 {
171 IRDA_DEBUG(2, "%s(), Probing for %s ...\n", __func__, chip->name);
172
173 /* Try all config registers for this chip */
174 for (cfg=0; cfg<2; cfg++)
175 {
176 cfg_base = chip->cfg[cfg];
177 if (!cfg_base)
178 continue;
179
180 memset(&info, 0, sizeof(chipio_t));
181 info.cfg_base = cfg_base;
182 info.fir_base = io[i];
183 info.dma = dma[i];
184 info.irq = irq[i];
185
186
187 /* Enter Configuration */
188 outb(chip->entr1, cfg_base);
189 outb(chip->entr2, cfg_base);
190
191 /* Select Logical Device 5 Registers (UART2) */
192 outb(0x07, cfg_base);
193 outb(0x05, cfg_base+1);
194
195 /* Read Chip Identification Register */
196 outb(chip->cid_index, cfg_base);
197 reg = inb(cfg_base+1);
198
199 if (reg == chip->cid_value)
200 {
201 IRDA_DEBUG(2, "%s(), Chip found at 0x%03x\n", __func__, cfg_base);
202
203 outb(0x1F, cfg_base);
204 revision = inb(cfg_base+1);
205 IRDA_DEBUG(2, "%s(), Found %s chip, revision=%d\n", __func__,
206 chip->name, revision);
207
208 /*
209 * If the user supplies the base address, then
210 * we init the chip, if not we probe the values
211 * set by the BIOS
212 */
213 if (io[i] < 2000)
214 {
215 chip->init(chip, &info);
216 }
217 else
218 {
219 chip->probe(chip, &info);
220 }
221
222 if (ali_ircc_open(i, &info) == 0)
223 ret = 0;
224 i++;
225 }
226 else
227 {
228 IRDA_DEBUG(2, "%s(), No %s chip at 0x%03x\n", __func__, chip->name, cfg_base);
229 }
230 /* Exit configuration */
231 outb(0xbb, cfg_base);
232 }
233 }
234
235 IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __func__);
236
237 if (ret)
238 platform_driver_unregister(&ali_ircc_driver);
239
240 return ret;
241 }
242
243 /*
244 * Function ali_ircc_cleanup ()
245 *
246 * Close all configured chips
247 *
248 */
249 static void __exit ali_ircc_cleanup(void)
250 {
251 int i;
252
253 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
254
255 for (i=0; i < ARRAY_SIZE(dev_self); i++) {
256 if (dev_self[i])
257 ali_ircc_close(dev_self[i]);
258 }
259
260 platform_driver_unregister(&ali_ircc_driver);
261
262 IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __func__);
263 }
264
265 static const struct net_device_ops ali_ircc_sir_ops = {
266 .ndo_open = ali_ircc_net_open,
267 .ndo_stop = ali_ircc_net_close,
268 .ndo_start_xmit = ali_ircc_sir_hard_xmit,
269 .ndo_do_ioctl = ali_ircc_net_ioctl,
270 };
271
272 static const struct net_device_ops ali_ircc_fir_ops = {
273 .ndo_open = ali_ircc_net_open,
274 .ndo_stop = ali_ircc_net_close,
275 .ndo_start_xmit = ali_ircc_fir_hard_xmit,
276 .ndo_do_ioctl = ali_ircc_net_ioctl,
277 };
278
279 /*
280 * Function ali_ircc_open (int i, chipio_t *inf)
281 *
282 * Open driver instance
283 *
284 */
285 static int ali_ircc_open(int i, chipio_t *info)
286 {
287 struct net_device *dev;
288 struct ali_ircc_cb *self;
289 int dongle_id;
290 int err;
291
292 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
293
294 if (i >= ARRAY_SIZE(dev_self)) {
295 IRDA_ERROR("%s(), maximum number of supported chips reached!\n",
296 __func__);
297 return -ENOMEM;
298 }
299
300 /* Set FIR FIFO and DMA Threshold */
301 if ((ali_ircc_setup(info)) == -1)
302 return -1;
303
304 dev = alloc_irdadev(sizeof(*self));
305 if (dev == NULL) {
306 IRDA_ERROR("%s(), can't allocate memory for control block!\n",
307 __func__);
308 return -ENOMEM;
309 }
310
311 self = netdev_priv(dev);
312 self->netdev = dev;
313 spin_lock_init(&self->lock);
314
315 /* Need to store self somewhere */
316 dev_self[i] = self;
317 self->index = i;
318
319 /* Initialize IO */
320 self->io.cfg_base = info->cfg_base; /* In ali_ircc_probe_53 assign */
321 self->io.fir_base = info->fir_base; /* info->sir_base = info->fir_base */
322 self->io.sir_base = info->sir_base; /* ALi SIR and FIR use the same address */
323 self->io.irq = info->irq;
324 self->io.fir_ext = CHIP_IO_EXTENT;
325 self->io.dma = info->dma;
326 self->io.fifo_size = 16; /* SIR: 16, FIR: 32 Benjamin 2000/11/1 */
327
328 /* Reserve the ioports that we need */
329 if (!request_region(self->io.fir_base, self->io.fir_ext,
330 ALI_IRCC_DRIVER_NAME)) {
331 IRDA_WARNING("%s(), can't get iobase of 0x%03x\n", __func__,
332 self->io.fir_base);
333 err = -ENODEV;
334 goto err_out1;
335 }
336
337 /* Initialize QoS for this device */
338 irda_init_max_qos_capabilies(&self->qos);
339
340 /* The only value we must override it the baudrate */
341 self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
342 IR_115200|IR_576000|IR_1152000|(IR_4000000 << 8); // benjamin 2000/11/8 05:27PM
343
344 self->qos.min_turn_time.bits = qos_mtt_bits;
345
346 irda_qos_bits_to_value(&self->qos);
347
348 /* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
349 self->rx_buff.truesize = 14384;
350 self->tx_buff.truesize = 14384;
351
352 /* Allocate memory if needed */
353 self->rx_buff.head =
354 dma_alloc_coherent(NULL, self->rx_buff.truesize,
355 &self->rx_buff_dma, GFP_KERNEL);
356 if (self->rx_buff.head == NULL) {
357 err = -ENOMEM;
358 goto err_out2;
359 }
360 memset(self->rx_buff.head, 0, self->rx_buff.truesize);
361
362 self->tx_buff.head =
363 dma_alloc_coherent(NULL, self->tx_buff.truesize,
364 &self->tx_buff_dma, GFP_KERNEL);
365 if (self->tx_buff.head == NULL) {
366 err = -ENOMEM;
367 goto err_out3;
368 }
369 memset(self->tx_buff.head, 0, self->tx_buff.truesize);
370
371 self->rx_buff.in_frame = FALSE;
372 self->rx_buff.state = OUTSIDE_FRAME;
373 self->tx_buff.data = self->tx_buff.head;
374 self->rx_buff.data = self->rx_buff.head;
375
376 /* Reset Tx queue info */
377 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
378 self->tx_fifo.tail = self->tx_buff.head;
379
380 /* Override the network functions we need to use */
381 dev->netdev_ops = &ali_ircc_sir_ops;
382
383 err = register_netdev(dev);
384 if (err) {
385 IRDA_ERROR("%s(), register_netdev() failed!\n", __func__);
386 goto err_out4;
387 }
388 IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);
389
390 /* Check dongle id */
391 dongle_id = ali_ircc_read_dongle_id(i, info);
392 IRDA_MESSAGE("%s(), %s, Found dongle: %s\n", __func__,
393 ALI_IRCC_DRIVER_NAME, dongle_types[dongle_id]);
394
395 self->io.dongle_id = dongle_id;
396
397 IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __func__);
398
399 return 0;
400
401 err_out4:
402 dma_free_coherent(NULL, self->tx_buff.truesize,
403 self->tx_buff.head, self->tx_buff_dma);
404 err_out3:
405 dma_free_coherent(NULL, self->rx_buff.truesize,
406 self->rx_buff.head, self->rx_buff_dma);
407 err_out2:
408 release_region(self->io.fir_base, self->io.fir_ext);
409 err_out1:
410 dev_self[i] = NULL;
411 free_netdev(dev);
412 return err;
413 }
414
415
416 /*
417 * Function ali_ircc_close (self)
418 *
419 * Close driver instance
420 *
421 */
422 static int __exit ali_ircc_close(struct ali_ircc_cb *self)
423 {
424 int iobase;
425
426 IRDA_DEBUG(4, "%s(), ---------------- Start ----------------\n", __func__);
427
428 IRDA_ASSERT(self != NULL, return -1;);
429
430 iobase = self->io.fir_base;
431
432 /* Remove netdevice */
433 unregister_netdev(self->netdev);
434
435 /* Release the PORT that this driver is using */
436 IRDA_DEBUG(4, "%s(), Releasing Region %03x\n", __func__, self->io.fir_base);
437 release_region(self->io.fir_base, self->io.fir_ext);
438
439 if (self->tx_buff.head)
440 dma_free_coherent(NULL, self->tx_buff.truesize,
441 self->tx_buff.head, self->tx_buff_dma);
442
443 if (self->rx_buff.head)
444 dma_free_coherent(NULL, self->rx_buff.truesize,
445 self->rx_buff.head, self->rx_buff_dma);
446
447 dev_self[self->index] = NULL;
448 free_netdev(self->netdev);
449
450 IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __func__);
451
452 return 0;
453 }
454
455 /*
456 * Function ali_ircc_init_43 (chip, info)
457 *
458 * Initialize the ALi M1543 chip.
459 */
460 static int ali_ircc_init_43(ali_chip_t *chip, chipio_t *info)
461 {
462 /* All controller information like I/O address, DMA channel, IRQ
463 * are set by BIOS
464 */
465
466 return 0;
467 }
468
469 /*
470 * Function ali_ircc_init_53 (chip, info)
471 *
472 * Initialize the ALi M1535 chip.
473 */
474 static int ali_ircc_init_53(ali_chip_t *chip, chipio_t *info)
475 {
476 /* All controller information like I/O address, DMA channel, IRQ
477 * are set by BIOS
478 */
479
480 return 0;
481 }
482
483 /*
484 * Function ali_ircc_probe_53 (chip, info)
485 *
486 * Probes for the ALi M1535D or M1535
487 */
488 static int ali_ircc_probe_53(ali_chip_t *chip, chipio_t *info)
489 {
490 int cfg_base = info->cfg_base;
491 int hi, low, reg;
492
493 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
494
495 /* Enter Configuration */
496 outb(chip->entr1, cfg_base);
497 outb(chip->entr2, cfg_base);
498
499 /* Select Logical Device 5 Registers (UART2) */
500 outb(0x07, cfg_base);
501 outb(0x05, cfg_base+1);
502
503 /* Read address control register */
504 outb(0x60, cfg_base);
505 hi = inb(cfg_base+1);
506 outb(0x61, cfg_base);
507 low = inb(cfg_base+1);
508 info->fir_base = (hi<<8) + low;
509
510 info->sir_base = info->fir_base;
511
512 IRDA_DEBUG(2, "%s(), probing fir_base=0x%03x\n", __func__, info->fir_base);
513
514 /* Read IRQ control register */
515 outb(0x70, cfg_base);
516 reg = inb(cfg_base+1);
517 info->irq = reg & 0x0f;
518 IRDA_DEBUG(2, "%s(), probing irq=%d\n", __func__, info->irq);
519
520 /* Read DMA channel */
521 outb(0x74, cfg_base);
522 reg = inb(cfg_base+1);
523 info->dma = reg & 0x07;
524
525 if(info->dma == 0x04)
526 IRDA_WARNING("%s(), No DMA channel assigned !\n", __func__);
527 else
528 IRDA_DEBUG(2, "%s(), probing dma=%d\n", __func__, info->dma);
529
530 /* Read Enabled Status */
531 outb(0x30, cfg_base);
532 reg = inb(cfg_base+1);
533 info->enabled = (reg & 0x80) && (reg & 0x01);
534 IRDA_DEBUG(2, "%s(), probing enabled=%d\n", __func__, info->enabled);
535
536 /* Read Power Status */
537 outb(0x22, cfg_base);
538 reg = inb(cfg_base+1);
539 info->suspended = (reg & 0x20);
540 IRDA_DEBUG(2, "%s(), probing suspended=%d\n", __func__, info->suspended);
541
542 /* Exit configuration */
543 outb(0xbb, cfg_base);
544
545 IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __func__);
546
547 return 0;
548 }
549
550 /*
551 * Function ali_ircc_setup (info)
552 *
553 * Set FIR FIFO and DMA Threshold
554 * Returns non-negative on success.
555 *
556 */
557 static int ali_ircc_setup(chipio_t *info)
558 {
559 unsigned char tmp;
560 int version;
561 int iobase = info->fir_base;
562
563 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
564
565 /* Locking comments :
566 * Most operations here need to be protected. We are called before
567 * the device instance is created in ali_ircc_open(), therefore
568 * nobody can bother us - Jean II */
569
570 /* Switch to FIR space */
571 SIR2FIR(iobase);
572
573 /* Master Reset */
574 outb(0x40, iobase+FIR_MCR); // benjamin 2000/11/30 11:45AM
575
576 /* Read FIR ID Version Register */
577 switch_bank(iobase, BANK3);
578 version = inb(iobase+FIR_ID_VR);
579
580 /* Should be 0x00 in the M1535/M1535D */
581 if(version != 0x00)
582 {
583 IRDA_ERROR("%s, Wrong chip version %02x\n",
584 ALI_IRCC_DRIVER_NAME, version);
585 return -1;
586 }
587
588 /* Set FIR FIFO Threshold Register */
589 switch_bank(iobase, BANK1);
590 outb(RX_FIFO_Threshold, iobase+FIR_FIFO_TR);
591
592 /* Set FIR DMA Threshold Register */
593 outb(RX_DMA_Threshold, iobase+FIR_DMA_TR);
594
595 /* CRC enable */
596 switch_bank(iobase, BANK2);
597 outb(inb(iobase+FIR_IRDA_CR) | IRDA_CR_CRC, iobase+FIR_IRDA_CR);
598
599 /* NDIS driver set TX Length here BANK2 Alias 3, Alias4*/
600
601 /* Switch to Bank 0 */
602 switch_bank(iobase, BANK0);
603
604 tmp = inb(iobase+FIR_LCR_B);
605 tmp &=~0x20; // disable SIP
606 tmp |= 0x80; // these two steps make RX mode
607 tmp &= 0xbf;
608 outb(tmp, iobase+FIR_LCR_B);
609
610 /* Disable Interrupt */
611 outb(0x00, iobase+FIR_IER);
612
613
614 /* Switch to SIR space */
615 FIR2SIR(iobase);
616
617 IRDA_MESSAGE("%s, driver loaded (Benjamin Kong)\n",
618 ALI_IRCC_DRIVER_NAME);
619
620 /* Enable receive interrupts */
621 // outb(UART_IER_RDI, iobase+UART_IER); //benjamin 2000/11/23 01:25PM
622 // Turn on the interrupts in ali_ircc_net_open
623
624 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__);
625
626 return 0;
627 }
628
629 /*
630 * Function ali_ircc_read_dongle_id (int index, info)
631 *
632 * Try to read dongle indentification. This procedure needs to be executed
633 * once after power-on/reset. It also needs to be used whenever you suspect
634 * that the user may have plugged/unplugged the IrDA Dongle.
635 */
636 static int ali_ircc_read_dongle_id (int i, chipio_t *info)
637 {
638 int dongle_id, reg;
639 int cfg_base = info->cfg_base;
640
641 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
642
643 /* Enter Configuration */
644 outb(chips[i].entr1, cfg_base);
645 outb(chips[i].entr2, cfg_base);
646
647 /* Select Logical Device 5 Registers (UART2) */
648 outb(0x07, cfg_base);
649 outb(0x05, cfg_base+1);
650
651 /* Read Dongle ID */
652 outb(0xf0, cfg_base);
653 reg = inb(cfg_base+1);
654 dongle_id = ((reg>>6)&0x02) | ((reg>>5)&0x01);
655 IRDA_DEBUG(2, "%s(), probing dongle_id=%d, dongle_types=%s\n", __func__,
656 dongle_id, dongle_types[dongle_id]);
657
658 /* Exit configuration */
659 outb(0xbb, cfg_base);
660
661 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__);
662
663 return dongle_id;
664 }
665
666 /*
667 * Function ali_ircc_interrupt (irq, dev_id, regs)
668 *
669 * An interrupt from the chip has arrived. Time to do some work
670 *
671 */
672 static irqreturn_t ali_ircc_interrupt(int irq, void *dev_id)
673 {
674 struct net_device *dev = dev_id;
675 struct ali_ircc_cb *self;
676 int ret;
677
678 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
679
680 self = netdev_priv(dev);
681
682 spin_lock(&self->lock);
683
684 /* Dispatch interrupt handler for the current speed */
685 if (self->io.speed > 115200)
686 ret = ali_ircc_fir_interrupt(self);
687 else
688 ret = ali_ircc_sir_interrupt(self);
689
690 spin_unlock(&self->lock);
691
692 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__);
693 return ret;
694 }
695 /*
696 * Function ali_ircc_fir_interrupt(irq, struct ali_ircc_cb *self)
697 *
698 * Handle MIR/FIR interrupt
699 *
700 */
701 static irqreturn_t ali_ircc_fir_interrupt(struct ali_ircc_cb *self)
702 {
703 __u8 eir, OldMessageCount;
704 int iobase, tmp;
705
706 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__);
707
708 iobase = self->io.fir_base;
709
710 switch_bank(iobase, BANK0);
711 self->InterruptID = inb(iobase+FIR_IIR);
712 self->BusStatus = inb(iobase+FIR_BSR);
713
714 OldMessageCount = (self->LineStatus + 1) & 0x07;
715 self->LineStatus = inb(iobase+FIR_LSR);
716 //self->ier = inb(iobase+FIR_IER); 2000/12/1 04:32PM
717 eir = self->InterruptID & self->ier; /* Mask out the interesting ones */
718
719 IRDA_DEBUG(1, "%s(), self->InterruptID = %x\n", __func__,self->InterruptID);
720 IRDA_DEBUG(1, "%s(), self->LineStatus = %x\n", __func__,self->LineStatus);
721 IRDA_DEBUG(1, "%s(), self->ier = %x\n", __func__,self->ier);
722 IRDA_DEBUG(1, "%s(), eir = %x\n", __func__,eir);
723
724 /* Disable interrupts */
725 SetCOMInterrupts(self, FALSE);
726
727 /* Tx or Rx Interrupt */
728
729 if (eir & IIR_EOM)
730 {
731 if (self->io.direction == IO_XMIT) /* TX */
732 {
733 IRDA_DEBUG(1, "%s(), ******* IIR_EOM (Tx) *******\n", __func__);
734
735 if(ali_ircc_dma_xmit_complete(self))
736 {
737 if (irda_device_txqueue_empty(self->netdev))
738 {
739 /* Prepare for receive */
740 ali_ircc_dma_receive(self);
741 self->ier = IER_EOM;
742 }
743 }
744 else
745 {
746 self->ier = IER_EOM;
747 }
748
749 }
750 else /* RX */
751 {
752 IRDA_DEBUG(1, "%s(), ******* IIR_EOM (Rx) *******\n", __func__);
753
754 if(OldMessageCount > ((self->LineStatus+1) & 0x07))
755 {
756 self->rcvFramesOverflow = TRUE;
757 IRDA_DEBUG(1, "%s(), ******* self->rcvFramesOverflow = TRUE ********\n", __func__);
758 }
759
760 if (ali_ircc_dma_receive_complete(self))
761 {
762 IRDA_DEBUG(1, "%s(), ******* receive complete ********\n", __func__);
763
764 self->ier = IER_EOM;
765 }
766 else
767 {
768 IRDA_DEBUG(1, "%s(), ******* Not receive complete ********\n", __func__);
769
770 self->ier = IER_EOM | IER_TIMER;
771 }
772
773 }
774 }
775 /* Timer Interrupt */
776 else if (eir & IIR_TIMER)
777 {
778 if(OldMessageCount > ((self->LineStatus+1) & 0x07))
779 {
780 self->rcvFramesOverflow = TRUE;
781 IRDA_DEBUG(1, "%s(), ******* self->rcvFramesOverflow = TRUE *******\n", __func__);
782 }
783 /* Disable Timer */
784 switch_bank(iobase, BANK1);
785 tmp = inb(iobase+FIR_CR);
786 outb( tmp& ~CR_TIMER_EN, iobase+FIR_CR);
787
788 /* Check if this is a Tx timer interrupt */
789 if (self->io.direction == IO_XMIT)
790 {
791 ali_ircc_dma_xmit(self);
792
793 /* Interrupt on EOM */
794 self->ier = IER_EOM;
795
796 }
797 else /* Rx */
798 {
799 if(ali_ircc_dma_receive_complete(self))
800 {
801 self->ier = IER_EOM;
802 }
803 else
804 {
805 self->ier = IER_EOM | IER_TIMER;
806 }
807 }
808 }
809
810 /* Restore Interrupt */
811 SetCOMInterrupts(self, TRUE);
812
813 IRDA_DEBUG(1, "%s(), ----------------- End ---------------\n", __func__);
814 return IRQ_RETVAL(eir);
815 }
816
817 /*
818 * Function ali_ircc_sir_interrupt (irq, self, eir)
819 *
820 * Handle SIR interrupt
821 *
822 */
823 static irqreturn_t ali_ircc_sir_interrupt(struct ali_ircc_cb *self)
824 {
825 int iobase;
826 int iir, lsr;
827
828 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
829
830 iobase = self->io.sir_base;
831
832 iir = inb(iobase+UART_IIR) & UART_IIR_ID;
833 if (iir) {
834 /* Clear interrupt */
835 lsr = inb(iobase+UART_LSR);
836
837 IRDA_DEBUG(4, "%s(), iir=%02x, lsr=%02x, iobase=%#x\n", __func__,
838 iir, lsr, iobase);
839
840 switch (iir)
841 {
842 case UART_IIR_RLSI:
843 IRDA_DEBUG(2, "%s(), RLSI\n", __func__);
844 break;
845 case UART_IIR_RDI:
846 /* Receive interrupt */
847 ali_ircc_sir_receive(self);
848 break;
849 case UART_IIR_THRI:
850 if (lsr & UART_LSR_THRE)
851 {
852 /* Transmitter ready for data */
853 ali_ircc_sir_write_wakeup(self);
854 }
855 break;
856 default:
857 IRDA_DEBUG(0, "%s(), unhandled IIR=%#x\n", __func__, iir);
858 break;
859 }
860
861 }
862
863
864 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__);
865
866 return IRQ_RETVAL(iir);
867 }
868
869
870 /*
871 * Function ali_ircc_sir_receive (self)
872 *
873 * Receive one frame from the infrared port
874 *
875 */
876 static void ali_ircc_sir_receive(struct ali_ircc_cb *self)
877 {
878 int boguscount = 0;
879 int iobase;
880
881 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
882 IRDA_ASSERT(self != NULL, return;);
883
884 iobase = self->io.sir_base;
885
886 /*
887 * Receive all characters in Rx FIFO, unwrap and unstuff them.
888 * async_unwrap_char will deliver all found frames
889 */
890 do {
891 async_unwrap_char(self->netdev, &self->netdev->stats, &self->rx_buff,
892 inb(iobase+UART_RX));
893
894 /* Make sure we don't stay here too long */
895 if (boguscount++ > 32) {
896 IRDA_DEBUG(2,"%s(), breaking!\n", __func__);
897 break;
898 }
899 } while (inb(iobase+UART_LSR) & UART_LSR_DR);
900
901 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
902 }
903
904 /*
905 * Function ali_ircc_sir_write_wakeup (tty)
906 *
907 * Called by the driver when there's room for more data. If we have
908 * more packets to send, we send them here.
909 *
910 */
911 static void ali_ircc_sir_write_wakeup(struct ali_ircc_cb *self)
912 {
913 int actual = 0;
914 int iobase;
915
916 IRDA_ASSERT(self != NULL, return;);
917
918 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__ );
919
920 iobase = self->io.sir_base;
921
922 /* Finished with frame? */
923 if (self->tx_buff.len > 0)
924 {
925 /* Write data left in transmit buffer */
926 actual = ali_ircc_sir_write(iobase, self->io.fifo_size,
927 self->tx_buff.data, self->tx_buff.len);
928 self->tx_buff.data += actual;
929 self->tx_buff.len -= actual;
930 }
931 else
932 {
933 if (self->new_speed)
934 {
935 /* We must wait until all data are gone */
936 while(!(inb(iobase+UART_LSR) & UART_LSR_TEMT))
937 IRDA_DEBUG(1, "%s(), UART_LSR_THRE\n", __func__ );
938
939 IRDA_DEBUG(1, "%s(), Changing speed! self->new_speed = %d\n", __func__ , self->new_speed);
940 ali_ircc_change_speed(self, self->new_speed);
941 self->new_speed = 0;
942
943 // benjamin 2000/11/10 06:32PM
944 if (self->io.speed > 115200)
945 {
946 IRDA_DEBUG(2, "%s(), ali_ircc_change_speed from UART_LSR_TEMT\n", __func__ );
947
948 self->ier = IER_EOM;
949 // SetCOMInterrupts(self, TRUE);
950 return;
951 }
952 }
953 else
954 {
955 netif_wake_queue(self->netdev);
956 }
957
958 self->netdev->stats.tx_packets++;
959
960 /* Turn on receive interrupts */
961 outb(UART_IER_RDI, iobase+UART_IER);
962 }
963
964 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
965 }
966
967 static void ali_ircc_change_speed(struct ali_ircc_cb *self, __u32 baud)
968 {
969 struct net_device *dev = self->netdev;
970 int iobase;
971
972 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__ );
973
974 IRDA_DEBUG(2, "%s(), setting speed = %d\n", __func__ , baud);
975
976 /* This function *must* be called with irq off and spin-lock.
977 * - Jean II */
978
979 iobase = self->io.fir_base;
980
981 SetCOMInterrupts(self, FALSE); // 2000/11/24 11:43AM
982
983 /* Go to MIR, FIR Speed */
984 if (baud > 115200)
985 {
986
987
988 ali_ircc_fir_change_speed(self, baud);
989
990 /* Install FIR xmit handler*/
991 dev->netdev_ops = &ali_ircc_fir_ops;
992
993 /* Enable Interuupt */
994 self->ier = IER_EOM; // benjamin 2000/11/20 07:24PM
995
996 /* Be ready for incomming frames */
997 ali_ircc_dma_receive(self); // benajmin 2000/11/8 07:46PM not complete
998 }
999 /* Go to SIR Speed */
1000 else
1001 {
1002 ali_ircc_sir_change_speed(self, baud);
1003
1004 /* Install SIR xmit handler*/
1005 dev->netdev_ops = &ali_ircc_sir_ops;
1006 }
1007
1008
1009 SetCOMInterrupts(self, TRUE); // 2000/11/24 11:43AM
1010
1011 netif_wake_queue(self->netdev);
1012
1013 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
1014 }
1015
1016 static void ali_ircc_fir_change_speed(struct ali_ircc_cb *priv, __u32 baud)
1017 {
1018
1019 int iobase;
1020 struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
1021 struct net_device *dev;
1022
1023 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__ );
1024
1025 IRDA_ASSERT(self != NULL, return;);
1026
1027 dev = self->netdev;
1028 iobase = self->io.fir_base;
1029
1030 IRDA_DEBUG(1, "%s(), self->io.speed = %d, change to speed = %d\n", __func__ ,self->io.speed,baud);
1031
1032 /* Come from SIR speed */
1033 if(self->io.speed <=115200)
1034 {
1035 SIR2FIR(iobase);
1036 }
1037
1038 /* Update accounting for new speed */
1039 self->io.speed = baud;
1040
1041 // Set Dongle Speed mode
1042 ali_ircc_change_dongle_speed(self, baud);
1043
1044 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1045 }
1046
1047 /*
1048 * Function ali_sir_change_speed (self, speed)
1049 *
1050 * Set speed of IrDA port to specified baudrate
1051 *
1052 */
1053 static void ali_ircc_sir_change_speed(struct ali_ircc_cb *priv, __u32 speed)
1054 {
1055 struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
1056 unsigned long flags;
1057 int iobase;
1058 int fcr; /* FIFO control reg */
1059 int lcr; /* Line control reg */
1060 int divisor;
1061
1062 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__ );
1063
1064 IRDA_DEBUG(1, "%s(), Setting speed to: %d\n", __func__ , speed);
1065
1066 IRDA_ASSERT(self != NULL, return;);
1067
1068 iobase = self->io.sir_base;
1069
1070 /* Come from MIR or FIR speed */
1071 if(self->io.speed >115200)
1072 {
1073 // Set Dongle Speed mode first
1074 ali_ircc_change_dongle_speed(self, speed);
1075
1076 FIR2SIR(iobase);
1077 }
1078
1079 // Clear Line and Auxiluary status registers 2000/11/24 11:47AM
1080
1081 inb(iobase+UART_LSR);
1082 inb(iobase+UART_SCR);
1083
1084 /* Update accounting for new speed */
1085 self->io.speed = speed;
1086
1087 spin_lock_irqsave(&self->lock, flags);
1088
1089 divisor = 115200/speed;
1090
1091 fcr = UART_FCR_ENABLE_FIFO;
1092
1093 /*
1094 * Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and
1095 * almost 1,7 ms at 19200 bps. At speeds above that we can just forget
1096 * about this timeout since it will always be fast enough.
1097 */
1098 if (self->io.speed < 38400)
1099 fcr |= UART_FCR_TRIGGER_1;
1100 else
1101 fcr |= UART_FCR_TRIGGER_14;
1102
1103 /* IrDA ports use 8N1 */
1104 lcr = UART_LCR_WLEN8;
1105
1106 outb(UART_LCR_DLAB | lcr, iobase+UART_LCR); /* Set DLAB */
1107 outb(divisor & 0xff, iobase+UART_DLL); /* Set speed */
1108 outb(divisor >> 8, iobase+UART_DLM);
1109 outb(lcr, iobase+UART_LCR); /* Set 8N1 */
1110 outb(fcr, iobase+UART_FCR); /* Enable FIFO's */
1111
1112 /* without this, the connection will be broken after come back from FIR speed,
1113 but with this, the SIR connection is harder to established */
1114 outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase+UART_MCR);
1115
1116 spin_unlock_irqrestore(&self->lock, flags);
1117
1118 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1119 }
1120
1121 static void ali_ircc_change_dongle_speed(struct ali_ircc_cb *priv, int speed)
1122 {
1123
1124 struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
1125 int iobase,dongle_id;
1126 int tmp = 0;
1127
1128 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__ );
1129
1130 iobase = self->io.fir_base; /* or iobase = self->io.sir_base; */
1131 dongle_id = self->io.dongle_id;
1132
1133 /* We are already locked, no need to do it again */
1134
1135 IRDA_DEBUG(1, "%s(), Set Speed for %s , Speed = %d\n", __func__ , dongle_types[dongle_id], speed);
1136
1137 switch_bank(iobase, BANK2);
1138 tmp = inb(iobase+FIR_IRDA_CR);
1139
1140 /* IBM type dongle */
1141 if(dongle_id == 0)
1142 {
1143 if(speed == 4000000)
1144 {
1145 // __ __
1146 // SD/MODE __| |__ __
1147 // __ __
1148 // IRTX __ __| |__
1149 // T1 T2 T3 T4 T5
1150
1151 tmp &= ~IRDA_CR_HDLC; // HDLC=0
1152 tmp |= IRDA_CR_CRC; // CRC=1
1153
1154 switch_bank(iobase, BANK2);
1155 outb(tmp, iobase+FIR_IRDA_CR);
1156
1157 // T1 -> SD/MODE:0 IRTX:0
1158 tmp &= ~0x09;
1159 tmp |= 0x02;
1160 outb(tmp, iobase+FIR_IRDA_CR);
1161 udelay(2);
1162
1163 // T2 -> SD/MODE:1 IRTX:0
1164 tmp &= ~0x01;
1165 tmp |= 0x0a;
1166 outb(tmp, iobase+FIR_IRDA_CR);
1167 udelay(2);
1168
1169 // T3 -> SD/MODE:1 IRTX:1
1170 tmp |= 0x0b;
1171 outb(tmp, iobase+FIR_IRDA_CR);
1172 udelay(2);
1173
1174 // T4 -> SD/MODE:0 IRTX:1
1175 tmp &= ~0x08;
1176 tmp |= 0x03;
1177 outb(tmp, iobase+FIR_IRDA_CR);
1178 udelay(2);
1179
1180 // T5 -> SD/MODE:0 IRTX:0
1181 tmp &= ~0x09;
1182 tmp |= 0x02;
1183 outb(tmp, iobase+FIR_IRDA_CR);
1184 udelay(2);
1185
1186 // reset -> Normal TX output Signal
1187 outb(tmp & ~0x02, iobase+FIR_IRDA_CR);
1188 }
1189 else /* speed <=1152000 */
1190 {
1191 // __
1192 // SD/MODE __| |__
1193 //
1194 // IRTX ________
1195 // T1 T2 T3
1196
1197 /* MIR 115200, 57600 */
1198 if (speed==1152000)
1199 {
1200 tmp |= 0xA0; //HDLC=1, 1.152Mbps=1
1201 }
1202 else
1203 {
1204 tmp &=~0x80; //HDLC 0.576Mbps
1205 tmp |= 0x20; //HDLC=1,
1206 }
1207
1208 tmp |= IRDA_CR_CRC; // CRC=1
1209
1210 switch_bank(iobase, BANK2);
1211 outb(tmp, iobase+FIR_IRDA_CR);
1212
1213 /* MIR 115200, 57600 */
1214
1215 //switch_bank(iobase, BANK2);
1216 // T1 -> SD/MODE:0 IRTX:0
1217 tmp &= ~0x09;
1218 tmp |= 0x02;
1219 outb(tmp, iobase+FIR_IRDA_CR);
1220 udelay(2);
1221
1222 // T2 -> SD/MODE:1 IRTX:0
1223 tmp &= ~0x01;
1224 tmp |= 0x0a;
1225 outb(tmp, iobase+FIR_IRDA_CR);
1226
1227 // T3 -> SD/MODE:0 IRTX:0
1228 tmp &= ~0x09;
1229 tmp |= 0x02;
1230 outb(tmp, iobase+FIR_IRDA_CR);
1231 udelay(2);
1232
1233 // reset -> Normal TX output Signal
1234 outb(tmp & ~0x02, iobase+FIR_IRDA_CR);
1235 }
1236 }
1237 else if (dongle_id == 1) /* HP HDSL-3600 */
1238 {
1239 switch(speed)
1240 {
1241 case 4000000:
1242 tmp &= ~IRDA_CR_HDLC; // HDLC=0
1243 break;
1244
1245 case 1152000:
1246 tmp |= 0xA0; // HDLC=1, 1.152Mbps=1
1247 break;
1248
1249 case 576000:
1250 tmp &=~0x80; // HDLC 0.576Mbps
1251 tmp |= 0x20; // HDLC=1,
1252 break;
1253 }
1254
1255 tmp |= IRDA_CR_CRC; // CRC=1
1256
1257 switch_bank(iobase, BANK2);
1258 outb(tmp, iobase+FIR_IRDA_CR);
1259 }
1260 else /* HP HDSL-1100 */
1261 {
1262 if(speed <= 115200) /* SIR */
1263 {
1264
1265 tmp &= ~IRDA_CR_FIR_SIN; // HP sin select = 0
1266
1267 switch_bank(iobase, BANK2);
1268 outb(tmp, iobase+FIR_IRDA_CR);
1269 }
1270 else /* MIR FIR */
1271 {
1272
1273 switch(speed)
1274 {
1275 case 4000000:
1276 tmp &= ~IRDA_CR_HDLC; // HDLC=0
1277 break;
1278
1279 case 1152000:
1280 tmp |= 0xA0; // HDLC=1, 1.152Mbps=1
1281 break;
1282
1283 case 576000:
1284 tmp &=~0x80; // HDLC 0.576Mbps
1285 tmp |= 0x20; // HDLC=1,
1286 break;
1287 }
1288
1289 tmp |= IRDA_CR_CRC; // CRC=1
1290 tmp |= IRDA_CR_FIR_SIN; // HP sin select = 1
1291
1292 switch_bank(iobase, BANK2);
1293 outb(tmp, iobase+FIR_IRDA_CR);
1294 }
1295 }
1296
1297 switch_bank(iobase, BANK0);
1298
1299 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1300 }
1301
1302 /*
1303 * Function ali_ircc_sir_write (driver)
1304 *
1305 * Fill Tx FIFO with transmit data
1306 *
1307 */
1308 static int ali_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len)
1309 {
1310 int actual = 0;
1311
1312 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__ );
1313
1314 /* Tx FIFO should be empty! */
1315 if (!(inb(iobase+UART_LSR) & UART_LSR_THRE)) {
1316 IRDA_DEBUG(0, "%s(), failed, fifo not empty!\n", __func__ );
1317 return 0;
1318 }
1319
1320 /* Fill FIFO with current frame */
1321 while ((fifo_size-- > 0) && (actual < len)) {
1322 /* Transmit next byte */
1323 outb(buf[actual], iobase+UART_TX);
1324
1325 actual++;
1326 }
1327
1328 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
1329 return actual;
1330 }
1331
1332 /*
1333 * Function ali_ircc_net_open (dev)
1334 *
1335 * Start the device
1336 *
1337 */
1338 static int ali_ircc_net_open(struct net_device *dev)
1339 {
1340 struct ali_ircc_cb *self;
1341 int iobase;
1342 char hwname[32];
1343
1344 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__ );
1345
1346 IRDA_ASSERT(dev != NULL, return -1;);
1347
1348 self = netdev_priv(dev);
1349
1350 IRDA_ASSERT(self != NULL, return 0;);
1351
1352 iobase = self->io.fir_base;
1353
1354 /* Request IRQ and install Interrupt Handler */
1355 if (request_irq(self->io.irq, ali_ircc_interrupt, 0, dev->name, dev))
1356 {
1357 IRDA_WARNING("%s, unable to allocate irq=%d\n",
1358 ALI_IRCC_DRIVER_NAME,
1359 self->io.irq);
1360 return -EAGAIN;
1361 }
1362
1363 /*
1364 * Always allocate the DMA channel after the IRQ, and clean up on
1365 * failure.
1366 */
1367 if (request_dma(self->io.dma, dev->name)) {
1368 IRDA_WARNING("%s, unable to allocate dma=%d\n",
1369 ALI_IRCC_DRIVER_NAME,
1370 self->io.dma);
1371 free_irq(self->io.irq, self);
1372 return -EAGAIN;
1373 }
1374
1375 /* Turn on interrups */
1376 outb(UART_IER_RDI , iobase+UART_IER);
1377
1378 /* Ready to play! */
1379 netif_start_queue(dev); //benjamin by irport
1380
1381 /* Give self a hardware name */
1382 sprintf(hwname, "ALI-FIR @ 0x%03x", self->io.fir_base);
1383
1384 /*
1385 * Open new IrLAP layer instance, now that everything should be
1386 * initialized properly
1387 */
1388 self->irlap = irlap_open(dev, &self->qos, hwname);
1389
1390 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
1391
1392 return 0;
1393 }
1394
1395 /*
1396 * Function ali_ircc_net_close (dev)
1397 *
1398 * Stop the device
1399 *
1400 */
1401 static int ali_ircc_net_close(struct net_device *dev)
1402 {
1403
1404 struct ali_ircc_cb *self;
1405 //int iobase;
1406
1407 IRDA_DEBUG(4, "%s(), ---------------- Start ----------------\n", __func__ );
1408
1409 IRDA_ASSERT(dev != NULL, return -1;);
1410
1411 self = netdev_priv(dev);
1412 IRDA_ASSERT(self != NULL, return 0;);
1413
1414 /* Stop device */
1415 netif_stop_queue(dev);
1416
1417 /* Stop and remove instance of IrLAP */
1418 if (self->irlap)
1419 irlap_close(self->irlap);
1420 self->irlap = NULL;
1421
1422 disable_dma(self->io.dma);
1423
1424 /* Disable interrupts */
1425 SetCOMInterrupts(self, FALSE);
1426
1427 free_irq(self->io.irq, dev);
1428 free_dma(self->io.dma);
1429
1430 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
1431
1432 return 0;
1433 }
1434
1435 /*
1436 * Function ali_ircc_fir_hard_xmit (skb, dev)
1437 *
1438 * Transmit the frame
1439 *
1440 */
1441 static netdev_tx_t ali_ircc_fir_hard_xmit(struct sk_buff *skb,
1442 struct net_device *dev)
1443 {
1444 struct ali_ircc_cb *self;
1445 unsigned long flags;
1446 int iobase;
1447 __u32 speed;
1448 int mtt, diff;
1449
1450 IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __func__ );
1451
1452 self = netdev_priv(dev);
1453 iobase = self->io.fir_base;
1454
1455 netif_stop_queue(dev);
1456
1457 /* Make sure tests *& speed change are atomic */
1458 spin_lock_irqsave(&self->lock, flags);
1459
1460 /* Note : you should make sure that speed changes are not going
1461 * to corrupt any outgoing frame. Look at nsc-ircc for the gory
1462 * details - Jean II */
1463
1464 /* Check if we need to change the speed */
1465 speed = irda_get_next_speed(skb);
1466 if ((speed != self->io.speed) && (speed != -1)) {
1467 /* Check for empty frame */
1468 if (!skb->len) {
1469 ali_ircc_change_speed(self, speed);
1470 dev->trans_start = jiffies;
1471 spin_unlock_irqrestore(&self->lock, flags);
1472 dev_kfree_skb(skb);
1473 return NETDEV_TX_OK;
1474 } else
1475 self->new_speed = speed;
1476 }
1477
1478 /* Register and copy this frame to DMA memory */
1479 self->tx_fifo.queue[self->tx_fifo.free].start = self->tx_fifo.tail;
1480 self->tx_fifo.queue[self->tx_fifo.free].len = skb->len;
1481 self->tx_fifo.tail += skb->len;
1482
1483 dev->stats.tx_bytes += skb->len;
1484
1485 skb_copy_from_linear_data(skb, self->tx_fifo.queue[self->tx_fifo.free].start,
1486 skb->len);
1487 self->tx_fifo.len++;
1488 self->tx_fifo.free++;
1489
1490 /* Start transmit only if there is currently no transmit going on */
1491 if (self->tx_fifo.len == 1)
1492 {
1493 /* Check if we must wait the min turn time or not */
1494 mtt = irda_get_mtt(skb);
1495
1496 if (mtt)
1497 {
1498 /* Check how much time we have used already */
1499 do_gettimeofday(&self->now);
1500
1501 diff = self->now.tv_usec - self->stamp.tv_usec;
1502 /* self->stamp is set from ali_ircc_dma_receive_complete() */
1503
1504 IRDA_DEBUG(1, "%s(), ******* diff = %d *******\n", __func__ , diff);
1505
1506 if (diff < 0)
1507 diff += 1000000;
1508
1509 /* Check if the mtt is larger than the time we have
1510 * already used by all the protocol processing
1511 */
1512 if (mtt > diff)
1513 {
1514 mtt -= diff;
1515
1516 /*
1517 * Use timer if delay larger than 1000 us, and
1518 * use udelay for smaller values which should
1519 * be acceptable
1520 */
1521 if (mtt > 500)
1522 {
1523 /* Adjust for timer resolution */
1524 mtt = (mtt+250) / 500; /* 4 discard, 5 get advanced, Let's round off */
1525
1526 IRDA_DEBUG(1, "%s(), ************** mtt = %d ***********\n", __func__ , mtt);
1527
1528 /* Setup timer */
1529 if (mtt == 1) /* 500 us */
1530 {
1531 switch_bank(iobase, BANK1);
1532 outb(TIMER_IIR_500, iobase+FIR_TIMER_IIR);
1533 }
1534 else if (mtt == 2) /* 1 ms */
1535 {
1536 switch_bank(iobase, BANK1);
1537 outb(TIMER_IIR_1ms, iobase+FIR_TIMER_IIR);
1538 }
1539 else /* > 2ms -> 4ms */
1540 {
1541 switch_bank(iobase, BANK1);
1542 outb(TIMER_IIR_2ms, iobase+FIR_TIMER_IIR);
1543 }
1544
1545
1546 /* Start timer */
1547 outb(inb(iobase+FIR_CR) | CR_TIMER_EN, iobase+FIR_CR);
1548 self->io.direction = IO_XMIT;
1549
1550 /* Enable timer interrupt */
1551 self->ier = IER_TIMER;
1552 SetCOMInterrupts(self, TRUE);
1553
1554 /* Timer will take care of the rest */
1555 goto out;
1556 }
1557 else
1558 udelay(mtt);
1559 } // if (if (mtt > diff)
1560 }// if (mtt)
1561
1562 /* Enable EOM interrupt */
1563 self->ier = IER_EOM;
1564 SetCOMInterrupts(self, TRUE);
1565
1566 /* Transmit frame */
1567 ali_ircc_dma_xmit(self);
1568 } // if (self->tx_fifo.len == 1)
1569
1570 out:
1571
1572 /* Not busy transmitting anymore if window is not full */
1573 if (self->tx_fifo.free < MAX_TX_WINDOW)
1574 netif_wake_queue(self->netdev);
1575
1576 /* Restore bank register */
1577 switch_bank(iobase, BANK0);
1578
1579 dev->trans_start = jiffies;
1580 spin_unlock_irqrestore(&self->lock, flags);
1581 dev_kfree_skb(skb);
1582
1583 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1584 return NETDEV_TX_OK;
1585 }
1586
1587
1588 static void ali_ircc_dma_xmit(struct ali_ircc_cb *self)
1589 {
1590 int iobase, tmp;
1591 unsigned char FIFO_OPTI, Hi, Lo;
1592
1593
1594 IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __func__ );
1595
1596 iobase = self->io.fir_base;
1597
1598 /* FIFO threshold , this method comes from NDIS5 code */
1599
1600 if(self->tx_fifo.queue[self->tx_fifo.ptr].len < TX_FIFO_Threshold)
1601 FIFO_OPTI = self->tx_fifo.queue[self->tx_fifo.ptr].len-1;
1602 else
1603 FIFO_OPTI = TX_FIFO_Threshold;
1604
1605 /* Disable DMA */
1606 switch_bank(iobase, BANK1);
1607 outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1608
1609 self->io.direction = IO_XMIT;
1610
1611 irda_setup_dma(self->io.dma,
1612 ((u8 *)self->tx_fifo.queue[self->tx_fifo.ptr].start -
1613 self->tx_buff.head) + self->tx_buff_dma,
1614 self->tx_fifo.queue[self->tx_fifo.ptr].len,
1615 DMA_TX_MODE);
1616
1617 /* Reset Tx FIFO */
1618 switch_bank(iobase, BANK0);
1619 outb(LCR_A_FIFO_RESET, iobase+FIR_LCR_A);
1620
1621 /* Set Tx FIFO threshold */
1622 if (self->fifo_opti_buf!=FIFO_OPTI)
1623 {
1624 switch_bank(iobase, BANK1);
1625 outb(FIFO_OPTI, iobase+FIR_FIFO_TR) ;
1626 self->fifo_opti_buf=FIFO_OPTI;
1627 }
1628
1629 /* Set Tx DMA threshold */
1630 switch_bank(iobase, BANK1);
1631 outb(TX_DMA_Threshold, iobase+FIR_DMA_TR);
1632
1633 /* Set max Tx frame size */
1634 Hi = (self->tx_fifo.queue[self->tx_fifo.ptr].len >> 8) & 0x0f;
1635 Lo = self->tx_fifo.queue[self->tx_fifo.ptr].len & 0xff;
1636 switch_bank(iobase, BANK2);
1637 outb(Hi, iobase+FIR_TX_DSR_HI);
1638 outb(Lo, iobase+FIR_TX_DSR_LO);
1639
1640 /* Disable SIP , Disable Brick Wall (we don't support in TX mode), Change to TX mode */
1641 switch_bank(iobase, BANK0);
1642 tmp = inb(iobase+FIR_LCR_B);
1643 tmp &= ~0x20; // Disable SIP
1644 outb(((unsigned char)(tmp & 0x3f) | LCR_B_TX_MODE) & ~LCR_B_BW, iobase+FIR_LCR_B);
1645 IRDA_DEBUG(1, "%s(), *** Change to TX mode: FIR_LCR_B = 0x%x ***\n", __func__ , inb(iobase+FIR_LCR_B));
1646
1647 outb(0, iobase+FIR_LSR);
1648
1649 /* Enable DMA and Burst Mode */
1650 switch_bank(iobase, BANK1);
1651 outb(inb(iobase+FIR_CR) | CR_DMA_EN | CR_DMA_BURST, iobase+FIR_CR);
1652
1653 switch_bank(iobase, BANK0);
1654
1655 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1656 }
1657
1658 static int ali_ircc_dma_xmit_complete(struct ali_ircc_cb *self)
1659 {
1660 int iobase;
1661 int ret = TRUE;
1662
1663 IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __func__ );
1664
1665 iobase = self->io.fir_base;
1666
1667 /* Disable DMA */
1668 switch_bank(iobase, BANK1);
1669 outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1670
1671 /* Check for underrun! */
1672 switch_bank(iobase, BANK0);
1673 if((inb(iobase+FIR_LSR) & LSR_FRAME_ABORT) == LSR_FRAME_ABORT)
1674
1675 {
1676 IRDA_ERROR("%s(), ********* LSR_FRAME_ABORT *********\n", __func__);
1677 self->netdev->stats.tx_errors++;
1678 self->netdev->stats.tx_fifo_errors++;
1679 }
1680 else
1681 {
1682 self->netdev->stats.tx_packets++;
1683 }
1684
1685 /* Check if we need to change the speed */
1686 if (self->new_speed)
1687 {
1688 ali_ircc_change_speed(self, self->new_speed);
1689 self->new_speed = 0;
1690 }
1691
1692 /* Finished with this frame, so prepare for next */
1693 self->tx_fifo.ptr++;
1694 self->tx_fifo.len--;
1695
1696 /* Any frames to be sent back-to-back? */
1697 if (self->tx_fifo.len)
1698 {
1699 ali_ircc_dma_xmit(self);
1700
1701 /* Not finished yet! */
1702 ret = FALSE;
1703 }
1704 else
1705 { /* Reset Tx FIFO info */
1706 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1707 self->tx_fifo.tail = self->tx_buff.head;
1708 }
1709
1710 /* Make sure we have room for more frames */
1711 if (self->tx_fifo.free < MAX_TX_WINDOW) {
1712 /* Not busy transmitting anymore */
1713 /* Tell the network layer, that we can accept more frames */
1714 netif_wake_queue(self->netdev);
1715 }
1716
1717 switch_bank(iobase, BANK0);
1718
1719 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1720 return ret;
1721 }
1722
1723 /*
1724 * Function ali_ircc_dma_receive (self)
1725 *
1726 * Get ready for receiving a frame. The device will initiate a DMA
1727 * if it starts to receive a frame.
1728 *
1729 */
1730 static int ali_ircc_dma_receive(struct ali_ircc_cb *self)
1731 {
1732 int iobase, tmp;
1733
1734 IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __func__ );
1735
1736 iobase = self->io.fir_base;
1737
1738 /* Reset Tx FIFO info */
1739 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1740 self->tx_fifo.tail = self->tx_buff.head;
1741
1742 /* Disable DMA */
1743 switch_bank(iobase, BANK1);
1744 outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1745
1746 /* Reset Message Count */
1747 switch_bank(iobase, BANK0);
1748 outb(0x07, iobase+FIR_LSR);
1749
1750 self->rcvFramesOverflow = FALSE;
1751
1752 self->LineStatus = inb(iobase+FIR_LSR) ;
1753
1754 /* Reset Rx FIFO info */
1755 self->io.direction = IO_RECV;
1756 self->rx_buff.data = self->rx_buff.head;
1757
1758 /* Reset Rx FIFO */
1759 // switch_bank(iobase, BANK0);
1760 outb(LCR_A_FIFO_RESET, iobase+FIR_LCR_A);
1761
1762 self->st_fifo.len = self->st_fifo.pending_bytes = 0;
1763 self->st_fifo.tail = self->st_fifo.head = 0;
1764
1765 irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize,
1766 DMA_RX_MODE);
1767
1768 /* Set Receive Mode,Brick Wall */
1769 //switch_bank(iobase, BANK0);
1770 tmp = inb(iobase+FIR_LCR_B);
1771 outb((unsigned char)(tmp &0x3f) | LCR_B_RX_MODE | LCR_B_BW , iobase + FIR_LCR_B); // 2000/12/1 05:16PM
1772 IRDA_DEBUG(1, "%s(), *** Change To RX mode: FIR_LCR_B = 0x%x ***\n", __func__ , inb(iobase+FIR_LCR_B));
1773
1774 /* Set Rx Threshold */
1775 switch_bank(iobase, BANK1);
1776 outb(RX_FIFO_Threshold, iobase+FIR_FIFO_TR);
1777 outb(RX_DMA_Threshold, iobase+FIR_DMA_TR);
1778
1779 /* Enable DMA and Burst Mode */
1780 // switch_bank(iobase, BANK1);
1781 outb(CR_DMA_EN | CR_DMA_BURST, iobase+FIR_CR);
1782
1783 switch_bank(iobase, BANK0);
1784 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1785 return 0;
1786 }
1787
1788 static int ali_ircc_dma_receive_complete(struct ali_ircc_cb *self)
1789 {
1790 struct st_fifo *st_fifo;
1791 struct sk_buff *skb;
1792 __u8 status, MessageCount;
1793 int len, i, iobase, val;
1794
1795 IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __func__ );
1796
1797 st_fifo = &self->st_fifo;
1798 iobase = self->io.fir_base;
1799
1800 switch_bank(iobase, BANK0);
1801 MessageCount = inb(iobase+ FIR_LSR)&0x07;
1802
1803 if (MessageCount > 0)
1804 IRDA_DEBUG(0, "%s(), Message count = %d,\n", __func__ , MessageCount);
1805
1806 for (i=0; i<=MessageCount; i++)
1807 {
1808 /* Bank 0 */
1809 switch_bank(iobase, BANK0);
1810 status = inb(iobase+FIR_LSR);
1811
1812 switch_bank(iobase, BANK2);
1813 len = inb(iobase+FIR_RX_DSR_HI) & 0x0f;
1814 len = len << 8;
1815 len |= inb(iobase+FIR_RX_DSR_LO);
1816
1817 IRDA_DEBUG(1, "%s(), RX Length = 0x%.2x,\n", __func__ , len);
1818 IRDA_DEBUG(1, "%s(), RX Status = 0x%.2x,\n", __func__ , status);
1819
1820 if (st_fifo->tail >= MAX_RX_WINDOW) {
1821 IRDA_DEBUG(0, "%s(), window is full!\n", __func__ );
1822 continue;
1823 }
1824
1825 st_fifo->entries[st_fifo->tail].status = status;
1826 st_fifo->entries[st_fifo->tail].len = len;
1827 st_fifo->pending_bytes += len;
1828 st_fifo->tail++;
1829 st_fifo->len++;
1830 }
1831
1832 for (i=0; i<=MessageCount; i++)
1833 {
1834 /* Get first entry */
1835 status = st_fifo->entries[st_fifo->head].status;
1836 len = st_fifo->entries[st_fifo->head].len;
1837 st_fifo->pending_bytes -= len;
1838 st_fifo->head++;
1839 st_fifo->len--;
1840
1841 /* Check for errors */
1842 if ((status & 0xd8) || self->rcvFramesOverflow || (len==0))
1843 {
1844 IRDA_DEBUG(0,"%s(), ************* RX Errors ************\n", __func__ );
1845
1846 /* Skip frame */
1847 self->netdev->stats.rx_errors++;
1848
1849 self->rx_buff.data += len;
1850
1851 if (status & LSR_FIFO_UR)
1852 {
1853 self->netdev->stats.rx_frame_errors++;
1854 IRDA_DEBUG(0,"%s(), ************* FIFO Errors ************\n", __func__ );
1855 }
1856 if (status & LSR_FRAME_ERROR)
1857 {
1858 self->netdev->stats.rx_frame_errors++;
1859 IRDA_DEBUG(0,"%s(), ************* FRAME Errors ************\n", __func__ );
1860 }
1861
1862 if (status & LSR_CRC_ERROR)
1863 {
1864 self->netdev->stats.rx_crc_errors++;
1865 IRDA_DEBUG(0,"%s(), ************* CRC Errors ************\n", __func__ );
1866 }
1867
1868 if(self->rcvFramesOverflow)
1869 {
1870 self->netdev->stats.rx_frame_errors++;
1871 IRDA_DEBUG(0,"%s(), ************* Overran DMA buffer ************\n", __func__ );
1872 }
1873 if(len == 0)
1874 {
1875 self->netdev->stats.rx_frame_errors++;
1876 IRDA_DEBUG(0,"%s(), ********** Receive Frame Size = 0 *********\n", __func__ );
1877 }
1878 }
1879 else
1880 {
1881
1882 if (st_fifo->pending_bytes < 32)
1883 {
1884 switch_bank(iobase, BANK0);
1885 val = inb(iobase+FIR_BSR);
1886 if ((val& BSR_FIFO_NOT_EMPTY)== 0x80)
1887 {
1888 IRDA_DEBUG(0, "%s(), ************* BSR_FIFO_NOT_EMPTY ************\n", __func__ );
1889
1890 /* Put this entry back in fifo */
1891 st_fifo->head--;
1892 st_fifo->len++;
1893 st_fifo->pending_bytes += len;
1894 st_fifo->entries[st_fifo->head].status = status;
1895 st_fifo->entries[st_fifo->head].len = len;
1896
1897 /*
1898 * DMA not finished yet, so try again
1899 * later, set timer value, resolution
1900 * 500 us
1901 */
1902
1903 switch_bank(iobase, BANK1);
1904 outb(TIMER_IIR_500, iobase+FIR_TIMER_IIR); // 2001/1/2 05:07PM
1905
1906 /* Enable Timer */
1907 outb(inb(iobase+FIR_CR) | CR_TIMER_EN, iobase+FIR_CR);
1908
1909 return FALSE; /* I'll be back! */
1910 }
1911 }
1912
1913 /*
1914 * Remember the time we received this frame, so we can
1915 * reduce the min turn time a bit since we will know
1916 * how much time we have used for protocol processing
1917 */
1918 do_gettimeofday(&self->stamp);
1919
1920 skb = dev_alloc_skb(len+1);
1921 if (skb == NULL)
1922 {
1923 IRDA_WARNING("%s(), memory squeeze, "
1924 "dropping frame.\n",
1925 __func__);
1926 self->netdev->stats.rx_dropped++;
1927
1928 return FALSE;
1929 }
1930
1931 /* Make sure IP header gets aligned */
1932 skb_reserve(skb, 1);
1933
1934 /* Copy frame without CRC, CRC is removed by hardware*/
1935 skb_put(skb, len);
1936 skb_copy_to_linear_data(skb, self->rx_buff.data, len);
1937
1938 /* Move to next frame */
1939 self->rx_buff.data += len;
1940 self->netdev->stats.rx_bytes += len;
1941 self->netdev->stats.rx_packets++;
1942
1943 skb->dev = self->netdev;
1944 skb_reset_mac_header(skb);
1945 skb->protocol = htons(ETH_P_IRDA);
1946 netif_rx(skb);
1947 }
1948 }
1949
1950 switch_bank(iobase, BANK0);
1951
1952 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1953 return TRUE;
1954 }
1955
1956
1957
1958 /*
1959 * Function ali_ircc_sir_hard_xmit (skb, dev)
1960 *
1961 * Transmit the frame!
1962 *
1963 */
1964 static netdev_tx_t ali_ircc_sir_hard_xmit(struct sk_buff *skb,
1965 struct net_device *dev)
1966 {
1967 struct ali_ircc_cb *self;
1968 unsigned long flags;
1969 int iobase;
1970 __u32 speed;
1971
1972 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__ );
1973
1974 IRDA_ASSERT(dev != NULL, return NETDEV_TX_OK;);
1975
1976 self = netdev_priv(dev);
1977 IRDA_ASSERT(self != NULL, return NETDEV_TX_OK;);
1978
1979 iobase = self->io.sir_base;
1980
1981 netif_stop_queue(dev);
1982
1983 /* Make sure tests *& speed change are atomic */
1984 spin_lock_irqsave(&self->lock, flags);
1985
1986 /* Note : you should make sure that speed changes are not going
1987 * to corrupt any outgoing frame. Look at nsc-ircc for the gory
1988 * details - Jean II */
1989
1990 /* Check if we need to change the speed */
1991 speed = irda_get_next_speed(skb);
1992 if ((speed != self->io.speed) && (speed != -1)) {
1993 /* Check for empty frame */
1994 if (!skb->len) {
1995 ali_ircc_change_speed(self, speed);
1996 dev->trans_start = jiffies;
1997 spin_unlock_irqrestore(&self->lock, flags);
1998 dev_kfree_skb(skb);
1999 return NETDEV_TX_OK;
2000 } else
2001 self->new_speed = speed;
2002 }
2003
2004 /* Init tx buffer */
2005 self->tx_buff.data = self->tx_buff.head;
2006
2007 /* Copy skb to tx_buff while wrapping, stuffing and making CRC */
2008 self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data,
2009 self->tx_buff.truesize);
2010
2011 self->netdev->stats.tx_bytes += self->tx_buff.len;
2012
2013 /* Turn on transmit finished interrupt. Will fire immediately! */
2014 outb(UART_IER_THRI, iobase+UART_IER);
2015
2016 dev->trans_start = jiffies;
2017 spin_unlock_irqrestore(&self->lock, flags);
2018
2019 dev_kfree_skb(skb);
2020
2021 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
2022
2023 return NETDEV_TX_OK;
2024 }
2025
2026
2027 /*
2028 * Function ali_ircc_net_ioctl (dev, rq, cmd)
2029 *
2030 * Process IOCTL commands for this device
2031 *
2032 */
2033 static int ali_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2034 {
2035 struct if_irda_req *irq = (struct if_irda_req *) rq;
2036 struct ali_ircc_cb *self;
2037 unsigned long flags;
2038 int ret = 0;
2039
2040 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__ );
2041
2042 IRDA_ASSERT(dev != NULL, return -1;);
2043
2044 self = netdev_priv(dev);
2045
2046 IRDA_ASSERT(self != NULL, return -1;);
2047
2048 IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __func__ , dev->name, cmd);
2049
2050 switch (cmd) {
2051 case SIOCSBANDWIDTH: /* Set bandwidth */
2052 IRDA_DEBUG(1, "%s(), SIOCSBANDWIDTH\n", __func__ );
2053 /*
2054 * This function will also be used by IrLAP to change the
2055 * speed, so we still must allow for speed change within
2056 * interrupt context.
2057 */
2058 if (!in_interrupt() && !capable(CAP_NET_ADMIN))
2059 return -EPERM;
2060
2061 spin_lock_irqsave(&self->lock, flags);
2062 ali_ircc_change_speed(self, irq->ifr_baudrate);
2063 spin_unlock_irqrestore(&self->lock, flags);
2064 break;
2065 case SIOCSMEDIABUSY: /* Set media busy */
2066 IRDA_DEBUG(1, "%s(), SIOCSMEDIABUSY\n", __func__ );
2067 if (!capable(CAP_NET_ADMIN))
2068 return -EPERM;
2069 irda_device_set_media_busy(self->netdev, TRUE);
2070 break;
2071 case SIOCGRECEIVING: /* Check if we are receiving right now */
2072 IRDA_DEBUG(2, "%s(), SIOCGRECEIVING\n", __func__ );
2073 /* This is protected */
2074 irq->ifr_receiving = ali_ircc_is_receiving(self);
2075 break;
2076 default:
2077 ret = -EOPNOTSUPP;
2078 }
2079
2080 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
2081
2082 return ret;
2083 }
2084
2085 /*
2086 * Function ali_ircc_is_receiving (self)
2087 *
2088 * Return TRUE is we are currently receiving a frame
2089 *
2090 */
2091 static int ali_ircc_is_receiving(struct ali_ircc_cb *self)
2092 {
2093 unsigned long flags;
2094 int status = FALSE;
2095 int iobase;
2096
2097 IRDA_DEBUG(2, "%s(), ---------------- Start -----------------\n", __func__ );
2098
2099 IRDA_ASSERT(self != NULL, return FALSE;);
2100
2101 spin_lock_irqsave(&self->lock, flags);
2102
2103 if (self->io.speed > 115200)
2104 {
2105 iobase = self->io.fir_base;
2106
2107 switch_bank(iobase, BANK1);
2108 if((inb(iobase+FIR_FIFO_FR) & 0x3f) != 0)
2109 {
2110 /* We are receiving something */
2111 IRDA_DEBUG(1, "%s(), We are receiving something\n", __func__ );
2112 status = TRUE;
2113 }
2114 switch_bank(iobase, BANK0);
2115 }
2116 else
2117 {
2118 status = (self->rx_buff.state != OUTSIDE_FRAME);
2119 }
2120
2121 spin_unlock_irqrestore(&self->lock, flags);
2122
2123 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
2124
2125 return status;
2126 }
2127
2128 static int ali_ircc_suspend(struct platform_device *dev, pm_message_t state)
2129 {
2130 struct ali_ircc_cb *self = platform_get_drvdata(dev);
2131
2132 IRDA_MESSAGE("%s, Suspending\n", ALI_IRCC_DRIVER_NAME);
2133
2134 if (self->io.suspended)
2135 return 0;
2136
2137 ali_ircc_net_close(self->netdev);
2138
2139 self->io.suspended = 1;
2140
2141 return 0;
2142 }
2143
2144 static int ali_ircc_resume(struct platform_device *dev)
2145 {
2146 struct ali_ircc_cb *self = platform_get_drvdata(dev);
2147
2148 if (!self->io.suspended)
2149 return 0;
2150
2151 ali_ircc_net_open(self->netdev);
2152
2153 IRDA_MESSAGE("%s, Waking up\n", ALI_IRCC_DRIVER_NAME);
2154
2155 self->io.suspended = 0;
2156
2157 return 0;
2158 }
2159
2160 /* ALi Chip Function */
2161
2162 static void SetCOMInterrupts(struct ali_ircc_cb *self , unsigned char enable)
2163 {
2164
2165 unsigned char newMask;
2166
2167 int iobase = self->io.fir_base; /* or sir_base */
2168
2169 IRDA_DEBUG(2, "%s(), -------- Start -------- ( Enable = %d )\n", __func__ , enable);
2170
2171 /* Enable the interrupt which we wish to */
2172 if (enable){
2173 if (self->io.direction == IO_XMIT)
2174 {
2175 if (self->io.speed > 115200) /* FIR, MIR */
2176 {
2177 newMask = self->ier;
2178 }
2179 else /* SIR */
2180 {
2181 newMask = UART_IER_THRI | UART_IER_RDI;
2182 }
2183 }
2184 else {
2185 if (self->io.speed > 115200) /* FIR, MIR */
2186 {
2187 newMask = self->ier;
2188 }
2189 else /* SIR */
2190 {
2191 newMask = UART_IER_RDI;
2192 }
2193 }
2194 }
2195 else /* Disable all the interrupts */
2196 {
2197 newMask = 0x00;
2198
2199 }
2200
2201 //SIR and FIR has different registers
2202 if (self->io.speed > 115200)
2203 {
2204 switch_bank(iobase, BANK0);
2205 outb(newMask, iobase+FIR_IER);
2206 }
2207 else
2208 outb(newMask, iobase+UART_IER);
2209
2210 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
2211 }
2212
2213 static void SIR2FIR(int iobase)
2214 {
2215 //unsigned char tmp;
2216
2217 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__ );
2218
2219 /* Already protected (change_speed() or setup()), no need to lock.
2220 * Jean II */
2221
2222 outb(0x28, iobase+UART_MCR);
2223 outb(0x68, iobase+UART_MCR);
2224 outb(0x88, iobase+UART_MCR);
2225
2226 outb(0x60, iobase+FIR_MCR); /* Master Reset */
2227 outb(0x20, iobase+FIR_MCR); /* Master Interrupt Enable */
2228
2229 //tmp = inb(iobase+FIR_LCR_B); /* SIP enable */
2230 //tmp |= 0x20;
2231 //outb(tmp, iobase+FIR_LCR_B);
2232
2233 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
2234 }
2235
2236 static void FIR2SIR(int iobase)
2237 {
2238 unsigned char val;
2239
2240 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__ );
2241
2242 /* Already protected (change_speed() or setup()), no need to lock.
2243 * Jean II */
2244
2245 outb(0x20, iobase+FIR_MCR); /* IRQ to low */
2246 outb(0x00, iobase+UART_IER);
2247
2248 outb(0xA0, iobase+FIR_MCR); /* Don't set master reset */
2249 outb(0x00, iobase+UART_FCR);
2250 outb(0x07, iobase+UART_FCR);
2251
2252 val = inb(iobase+UART_RX);
2253 val = inb(iobase+UART_LSR);
2254 val = inb(iobase+UART_MSR);
2255
2256 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
2257 }
2258
2259 MODULE_AUTHOR("Benjamin Kong <benjamin_kong@ali.com.tw>");
2260 MODULE_DESCRIPTION("ALi FIR Controller Driver");
2261 MODULE_LICENSE("GPL");
2262 MODULE_ALIAS("platform:" ALI_IRCC_DRIVER_NAME);
2263
2264
2265 module_param_array(io, int, NULL, 0);
2266 MODULE_PARM_DESC(io, "Base I/O addresses");
2267 module_param_array(irq, int, NULL, 0);
2268 MODULE_PARM_DESC(irq, "IRQ lines");
2269 module_param_array(dma, int, NULL, 0);
2270 MODULE_PARM_DESC(dma, "DMA channels");
2271
2272 module_init(ali_ircc_init);
2273 module_exit(ali_ircc_cleanup);