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