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Merge rsync://rsync.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[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 < 4; 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 /* Set FIR FIFO and DMA Threshold */
278 if ((ali_ircc_setup(info)) == -1)
279 return -1;
280
281 dev = alloc_irdadev(sizeof(*self));
282 if (dev == NULL) {
283 IRDA_ERROR("%s(), can't allocate memory for control block!\n",
284 __FUNCTION__);
285 return -ENOMEM;
286 }
287
288 self = dev->priv;
289 self->netdev = dev;
290 spin_lock_init(&self->lock);
291
292 /* Need to store self somewhere */
293 dev_self[i] = self;
294 self->index = i;
295
296 /* Initialize IO */
297 self->io.cfg_base = info->cfg_base; /* In ali_ircc_probe_53 assign */
298 self->io.fir_base = info->fir_base; /* info->sir_base = info->fir_base */
299 self->io.sir_base = info->sir_base; /* ALi SIR and FIR use the same address */
300 self->io.irq = info->irq;
301 self->io.fir_ext = CHIP_IO_EXTENT;
302 self->io.dma = info->dma;
303 self->io.fifo_size = 16; /* SIR: 16, FIR: 32 Benjamin 2000/11/1 */
304
305 /* Reserve the ioports that we need */
306 if (!request_region(self->io.fir_base, self->io.fir_ext,
307 ALI_IRCC_DRIVER_NAME)) {
308 IRDA_WARNING("%s(), can't get iobase of 0x%03x\n", __FUNCTION__,
309 self->io.fir_base);
310 err = -ENODEV;
311 goto err_out1;
312 }
313
314 /* Initialize QoS for this device */
315 irda_init_max_qos_capabilies(&self->qos);
316
317 /* The only value we must override it the baudrate */
318 self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
319 IR_115200|IR_576000|IR_1152000|(IR_4000000 << 8); // benjamin 2000/11/8 05:27PM
320
321 self->qos.min_turn_time.bits = qos_mtt_bits;
322
323 irda_qos_bits_to_value(&self->qos);
324
325 /* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
326 self->rx_buff.truesize = 14384;
327 self->tx_buff.truesize = 14384;
328
329 /* Allocate memory if needed */
330 self->rx_buff.head =
331 dma_alloc_coherent(NULL, self->rx_buff.truesize,
332 &self->rx_buff_dma, GFP_KERNEL);
333 if (self->rx_buff.head == NULL) {
334 err = -ENOMEM;
335 goto err_out2;
336 }
337 memset(self->rx_buff.head, 0, self->rx_buff.truesize);
338
339 self->tx_buff.head =
340 dma_alloc_coherent(NULL, self->tx_buff.truesize,
341 &self->tx_buff_dma, GFP_KERNEL);
342 if (self->tx_buff.head == NULL) {
343 err = -ENOMEM;
344 goto err_out3;
345 }
346 memset(self->tx_buff.head, 0, self->tx_buff.truesize);
347
348 self->rx_buff.in_frame = FALSE;
349 self->rx_buff.state = OUTSIDE_FRAME;
350 self->tx_buff.data = self->tx_buff.head;
351 self->rx_buff.data = self->rx_buff.head;
352
353 /* Reset Tx queue info */
354 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
355 self->tx_fifo.tail = self->tx_buff.head;
356
357
358 /* Keep track of module usage */
359 SET_MODULE_OWNER(dev);
360
361 /* Override the network functions we need to use */
362 dev->hard_start_xmit = ali_ircc_sir_hard_xmit;
363 dev->open = ali_ircc_net_open;
364 dev->stop = ali_ircc_net_close;
365 dev->do_ioctl = ali_ircc_net_ioctl;
366 dev->get_stats = ali_ircc_net_get_stats;
367
368 err = register_netdev(dev);
369 if (err) {
370 IRDA_ERROR("%s(), register_netdev() failed!\n", __FUNCTION__);
371 goto err_out4;
372 }
373 IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);
374
375 /* Check dongle id */
376 dongle_id = ali_ircc_read_dongle_id(i, info);
377 IRDA_MESSAGE("%s(), %s, Found dongle: %s\n", __FUNCTION__,
378 ALI_IRCC_DRIVER_NAME, dongle_types[dongle_id]);
379
380 self->io.dongle_id = dongle_id;
381
382 IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__);
383
384 return 0;
385
386 err_out4:
387 dma_free_coherent(NULL, self->tx_buff.truesize,
388 self->tx_buff.head, self->tx_buff_dma);
389 err_out3:
390 dma_free_coherent(NULL, self->rx_buff.truesize,
391 self->rx_buff.head, self->rx_buff_dma);
392 err_out2:
393 release_region(self->io.fir_base, self->io.fir_ext);
394 err_out1:
395 dev_self[i] = NULL;
396 free_netdev(dev);
397 return err;
398 }
399
400
401 /*
402 * Function ali_ircc_close (self)
403 *
404 * Close driver instance
405 *
406 */
407 static int __exit ali_ircc_close(struct ali_ircc_cb *self)
408 {
409 int iobase;
410
411 IRDA_DEBUG(4, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
412
413 IRDA_ASSERT(self != NULL, return -1;);
414
415 iobase = self->io.fir_base;
416
417 /* Remove netdevice */
418 unregister_netdev(self->netdev);
419
420 /* Release the PORT that this driver is using */
421 IRDA_DEBUG(4, "%s(), Releasing Region %03x\n", __FUNCTION__, self->io.fir_base);
422 release_region(self->io.fir_base, self->io.fir_ext);
423
424 if (self->tx_buff.head)
425 dma_free_coherent(NULL, self->tx_buff.truesize,
426 self->tx_buff.head, self->tx_buff_dma);
427
428 if (self->rx_buff.head)
429 dma_free_coherent(NULL, self->rx_buff.truesize,
430 self->rx_buff.head, self->rx_buff_dma);
431
432 dev_self[self->index] = NULL;
433 free_netdev(self->netdev);
434
435 IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__);
436
437 return 0;
438 }
439
440 /*
441 * Function ali_ircc_init_43 (chip, info)
442 *
443 * Initialize the ALi M1543 chip.
444 */
445 static int ali_ircc_init_43(ali_chip_t *chip, chipio_t *info)
446 {
447 /* All controller information like I/O address, DMA channel, IRQ
448 * are set by BIOS
449 */
450
451 return 0;
452 }
453
454 /*
455 * Function ali_ircc_init_53 (chip, info)
456 *
457 * Initialize the ALi M1535 chip.
458 */
459 static int ali_ircc_init_53(ali_chip_t *chip, chipio_t *info)
460 {
461 /* All controller information like I/O address, DMA channel, IRQ
462 * are set by BIOS
463 */
464
465 return 0;
466 }
467
468 /*
469 * Function ali_ircc_probe_53 (chip, info)
470 *
471 * Probes for the ALi M1535D or M1535
472 */
473 static int ali_ircc_probe_53(ali_chip_t *chip, chipio_t *info)
474 {
475 int cfg_base = info->cfg_base;
476 int hi, low, reg;
477
478 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
479
480 /* Enter Configuration */
481 outb(chip->entr1, cfg_base);
482 outb(chip->entr2, cfg_base);
483
484 /* Select Logical Device 5 Registers (UART2) */
485 outb(0x07, cfg_base);
486 outb(0x05, cfg_base+1);
487
488 /* Read address control register */
489 outb(0x60, cfg_base);
490 hi = inb(cfg_base+1);
491 outb(0x61, cfg_base);
492 low = inb(cfg_base+1);
493 info->fir_base = (hi<<8) + low;
494
495 info->sir_base = info->fir_base;
496
497 IRDA_DEBUG(2, "%s(), probing fir_base=0x%03x\n", __FUNCTION__, info->fir_base);
498
499 /* Read IRQ control register */
500 outb(0x70, cfg_base);
501 reg = inb(cfg_base+1);
502 info->irq = reg & 0x0f;
503 IRDA_DEBUG(2, "%s(), probing irq=%d\n", __FUNCTION__, info->irq);
504
505 /* Read DMA channel */
506 outb(0x74, cfg_base);
507 reg = inb(cfg_base+1);
508 info->dma = reg & 0x07;
509
510 if(info->dma == 0x04)
511 IRDA_WARNING("%s(), No DMA channel assigned !\n", __FUNCTION__);
512 else
513 IRDA_DEBUG(2, "%s(), probing dma=%d\n", __FUNCTION__, info->dma);
514
515 /* Read Enabled Status */
516 outb(0x30, cfg_base);
517 reg = inb(cfg_base+1);
518 info->enabled = (reg & 0x80) && (reg & 0x01);
519 IRDA_DEBUG(2, "%s(), probing enabled=%d\n", __FUNCTION__, info->enabled);
520
521 /* Read Power Status */
522 outb(0x22, cfg_base);
523 reg = inb(cfg_base+1);
524 info->suspended = (reg & 0x20);
525 IRDA_DEBUG(2, "%s(), probing suspended=%d\n", __FUNCTION__, info->suspended);
526
527 /* Exit configuration */
528 outb(0xbb, cfg_base);
529
530 IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__);
531
532 return 0;
533 }
534
535 /*
536 * Function ali_ircc_setup (info)
537 *
538 * Set FIR FIFO and DMA Threshold
539 * Returns non-negative on success.
540 *
541 */
542 static int ali_ircc_setup(chipio_t *info)
543 {
544 unsigned char tmp;
545 int version;
546 int iobase = info->fir_base;
547
548 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
549
550 /* Locking comments :
551 * Most operations here need to be protected. We are called before
552 * the device instance is created in ali_ircc_open(), therefore
553 * nobody can bother us - Jean II */
554
555 /* Switch to FIR space */
556 SIR2FIR(iobase);
557
558 /* Master Reset */
559 outb(0x40, iobase+FIR_MCR); // benjamin 2000/11/30 11:45AM
560
561 /* Read FIR ID Version Register */
562 switch_bank(iobase, BANK3);
563 version = inb(iobase+FIR_ID_VR);
564
565 /* Should be 0x00 in the M1535/M1535D */
566 if(version != 0x00)
567 {
568 IRDA_ERROR("%s, Wrong chip version %02x\n",
569 ALI_IRCC_DRIVER_NAME, version);
570 return -1;
571 }
572
573 /* Set FIR FIFO Threshold Register */
574 switch_bank(iobase, BANK1);
575 outb(RX_FIFO_Threshold, iobase+FIR_FIFO_TR);
576
577 /* Set FIR DMA Threshold Register */
578 outb(RX_DMA_Threshold, iobase+FIR_DMA_TR);
579
580 /* CRC enable */
581 switch_bank(iobase, BANK2);
582 outb(inb(iobase+FIR_IRDA_CR) | IRDA_CR_CRC, iobase+FIR_IRDA_CR);
583
584 /* NDIS driver set TX Length here BANK2 Alias 3, Alias4*/
585
586 /* Switch to Bank 0 */
587 switch_bank(iobase, BANK0);
588
589 tmp = inb(iobase+FIR_LCR_B);
590 tmp &=~0x20; // disable SIP
591 tmp |= 0x80; // these two steps make RX mode
592 tmp &= 0xbf;
593 outb(tmp, iobase+FIR_LCR_B);
594
595 /* Disable Interrupt */
596 outb(0x00, iobase+FIR_IER);
597
598
599 /* Switch to SIR space */
600 FIR2SIR(iobase);
601
602 IRDA_MESSAGE("%s, driver loaded (Benjamin Kong)\n",
603 ALI_IRCC_DRIVER_NAME);
604
605 /* Enable receive interrupts */
606 // outb(UART_IER_RDI, iobase+UART_IER); //benjamin 2000/11/23 01:25PM
607 // Turn on the interrupts in ali_ircc_net_open
608
609 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__);
610
611 return 0;
612 }
613
614 /*
615 * Function ali_ircc_read_dongle_id (int index, info)
616 *
617 * Try to read dongle indentification. This procedure needs to be executed
618 * once after power-on/reset. It also needs to be used whenever you suspect
619 * that the user may have plugged/unplugged the IrDA Dongle.
620 */
621 static int ali_ircc_read_dongle_id (int i, chipio_t *info)
622 {
623 int dongle_id, reg;
624 int cfg_base = info->cfg_base;
625
626 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
627
628 /* Enter Configuration */
629 outb(chips[i].entr1, cfg_base);
630 outb(chips[i].entr2, cfg_base);
631
632 /* Select Logical Device 5 Registers (UART2) */
633 outb(0x07, cfg_base);
634 outb(0x05, cfg_base+1);
635
636 /* Read Dongle ID */
637 outb(0xf0, cfg_base);
638 reg = inb(cfg_base+1);
639 dongle_id = ((reg>>6)&0x02) | ((reg>>5)&0x01);
640 IRDA_DEBUG(2, "%s(), probing dongle_id=%d, dongle_types=%s\n", __FUNCTION__,
641 dongle_id, dongle_types[dongle_id]);
642
643 /* Exit configuration */
644 outb(0xbb, cfg_base);
645
646 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__);
647
648 return dongle_id;
649 }
650
651 /*
652 * Function ali_ircc_interrupt (irq, dev_id, regs)
653 *
654 * An interrupt from the chip has arrived. Time to do some work
655 *
656 */
657 static irqreturn_t ali_ircc_interrupt(int irq, void *dev_id,
658 struct pt_regs *regs)
659 {
660 struct net_device *dev = (struct net_device *) dev_id;
661 struct ali_ircc_cb *self;
662 int ret;
663
664 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
665
666 if (!dev) {
667 IRDA_WARNING("%s: irq %d for unknown device.\n",
668 ALI_IRCC_DRIVER_NAME, irq);
669 return IRQ_NONE;
670 }
671
672 self = (struct ali_ircc_cb *) dev->priv;
673
674 spin_lock(&self->lock);
675
676 /* Dispatch interrupt handler for the current speed */
677 if (self->io.speed > 115200)
678 ret = ali_ircc_fir_interrupt(self);
679 else
680 ret = ali_ircc_sir_interrupt(self);
681
682 spin_unlock(&self->lock);
683
684 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__);
685 return ret;
686 }
687 /*
688 * Function ali_ircc_fir_interrupt(irq, struct ali_ircc_cb *self)
689 *
690 * Handle MIR/FIR interrupt
691 *
692 */
693 static irqreturn_t ali_ircc_fir_interrupt(struct ali_ircc_cb *self)
694 {
695 __u8 eir, OldMessageCount;
696 int iobase, tmp;
697
698 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
699
700 iobase = self->io.fir_base;
701
702 switch_bank(iobase, BANK0);
703 self->InterruptID = inb(iobase+FIR_IIR);
704 self->BusStatus = inb(iobase+FIR_BSR);
705
706 OldMessageCount = (self->LineStatus + 1) & 0x07;
707 self->LineStatus = inb(iobase+FIR_LSR);
708 //self->ier = inb(iobase+FIR_IER); 2000/12/1 04:32PM
709 eir = self->InterruptID & self->ier; /* Mask out the interesting ones */
710
711 IRDA_DEBUG(1, "%s(), self->InterruptID = %x\n", __FUNCTION__,self->InterruptID);
712 IRDA_DEBUG(1, "%s(), self->LineStatus = %x\n", __FUNCTION__,self->LineStatus);
713 IRDA_DEBUG(1, "%s(), self->ier = %x\n", __FUNCTION__,self->ier);
714 IRDA_DEBUG(1, "%s(), eir = %x\n", __FUNCTION__,eir);
715
716 /* Disable interrupts */
717 SetCOMInterrupts(self, FALSE);
718
719 /* Tx or Rx Interrupt */
720
721 if (eir & IIR_EOM)
722 {
723 if (self->io.direction == IO_XMIT) /* TX */
724 {
725 IRDA_DEBUG(1, "%s(), ******* IIR_EOM (Tx) *******\n", __FUNCTION__);
726
727 if(ali_ircc_dma_xmit_complete(self))
728 {
729 if (irda_device_txqueue_empty(self->netdev))
730 {
731 /* Prepare for receive */
732 ali_ircc_dma_receive(self);
733 self->ier = IER_EOM;
734 }
735 }
736 else
737 {
738 self->ier = IER_EOM;
739 }
740
741 }
742 else /* RX */
743 {
744 IRDA_DEBUG(1, "%s(), ******* IIR_EOM (Rx) *******\n", __FUNCTION__);
745
746 if(OldMessageCount > ((self->LineStatus+1) & 0x07))
747 {
748 self->rcvFramesOverflow = TRUE;
749 IRDA_DEBUG(1, "%s(), ******* self->rcvFramesOverflow = TRUE ******** \n", __FUNCTION__);
750 }
751
752 if (ali_ircc_dma_receive_complete(self))
753 {
754 IRDA_DEBUG(1, "%s(), ******* receive complete ******** \n", __FUNCTION__);
755
756 self->ier = IER_EOM;
757 }
758 else
759 {
760 IRDA_DEBUG(1, "%s(), ******* Not receive complete ******** \n", __FUNCTION__);
761
762 self->ier = IER_EOM | IER_TIMER;
763 }
764
765 }
766 }
767 /* Timer Interrupt */
768 else if (eir & IIR_TIMER)
769 {
770 if(OldMessageCount > ((self->LineStatus+1) & 0x07))
771 {
772 self->rcvFramesOverflow = TRUE;
773 IRDA_DEBUG(1, "%s(), ******* self->rcvFramesOverflow = TRUE ******* \n", __FUNCTION__);
774 }
775 /* Disable Timer */
776 switch_bank(iobase, BANK1);
777 tmp = inb(iobase+FIR_CR);
778 outb( tmp& ~CR_TIMER_EN, iobase+FIR_CR);
779
780 /* Check if this is a Tx timer interrupt */
781 if (self->io.direction == IO_XMIT)
782 {
783 ali_ircc_dma_xmit(self);
784
785 /* Interrupt on EOM */
786 self->ier = IER_EOM;
787
788 }
789 else /* Rx */
790 {
791 if(ali_ircc_dma_receive_complete(self))
792 {
793 self->ier = IER_EOM;
794 }
795 else
796 {
797 self->ier = IER_EOM | IER_TIMER;
798 }
799 }
800 }
801
802 /* Restore Interrupt */
803 SetCOMInterrupts(self, TRUE);
804
805 IRDA_DEBUG(1, "%s(), ----------------- End ---------------\n", __FUNCTION__);
806 return IRQ_RETVAL(eir);
807 }
808
809 /*
810 * Function ali_ircc_sir_interrupt (irq, self, eir)
811 *
812 * Handle SIR interrupt
813 *
814 */
815 static irqreturn_t ali_ircc_sir_interrupt(struct ali_ircc_cb *self)
816 {
817 int iobase;
818 int iir, lsr;
819
820 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
821
822 iobase = self->io.sir_base;
823
824 iir = inb(iobase+UART_IIR) & UART_IIR_ID;
825 if (iir) {
826 /* Clear interrupt */
827 lsr = inb(iobase+UART_LSR);
828
829 IRDA_DEBUG(4, "%s(), iir=%02x, lsr=%02x, iobase=%#x\n", __FUNCTION__,
830 iir, lsr, iobase);
831
832 switch (iir)
833 {
834 case UART_IIR_RLSI:
835 IRDA_DEBUG(2, "%s(), RLSI\n", __FUNCTION__);
836 break;
837 case UART_IIR_RDI:
838 /* Receive interrupt */
839 ali_ircc_sir_receive(self);
840 break;
841 case UART_IIR_THRI:
842 if (lsr & UART_LSR_THRE)
843 {
844 /* Transmitter ready for data */
845 ali_ircc_sir_write_wakeup(self);
846 }
847 break;
848 default:
849 IRDA_DEBUG(0, "%s(), unhandled IIR=%#x\n", __FUNCTION__, iir);
850 break;
851 }
852
853 }
854
855
856 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__);
857
858 return IRQ_RETVAL(iir);
859 }
860
861
862 /*
863 * Function ali_ircc_sir_receive (self)
864 *
865 * Receive one frame from the infrared port
866 *
867 */
868 static void ali_ircc_sir_receive(struct ali_ircc_cb *self)
869 {
870 int boguscount = 0;
871 int iobase;
872
873 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
874 IRDA_ASSERT(self != NULL, return;);
875
876 iobase = self->io.sir_base;
877
878 /*
879 * Receive all characters in Rx FIFO, unwrap and unstuff them.
880 * async_unwrap_char will deliver all found frames
881 */
882 do {
883 async_unwrap_char(self->netdev, &self->stats, &self->rx_buff,
884 inb(iobase+UART_RX));
885
886 /* Make sure we don't stay here too long */
887 if (boguscount++ > 32) {
888 IRDA_DEBUG(2,"%s(), breaking!\n", __FUNCTION__);
889 break;
890 }
891 } while (inb(iobase+UART_LSR) & UART_LSR_DR);
892
893 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
894 }
895
896 /*
897 * Function ali_ircc_sir_write_wakeup (tty)
898 *
899 * Called by the driver when there's room for more data. If we have
900 * more packets to send, we send them here.
901 *
902 */
903 static void ali_ircc_sir_write_wakeup(struct ali_ircc_cb *self)
904 {
905 int actual = 0;
906 int iobase;
907
908 IRDA_ASSERT(self != NULL, return;);
909
910 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
911
912 iobase = self->io.sir_base;
913
914 /* Finished with frame? */
915 if (self->tx_buff.len > 0)
916 {
917 /* Write data left in transmit buffer */
918 actual = ali_ircc_sir_write(iobase, self->io.fifo_size,
919 self->tx_buff.data, self->tx_buff.len);
920 self->tx_buff.data += actual;
921 self->tx_buff.len -= actual;
922 }
923 else
924 {
925 if (self->new_speed)
926 {
927 /* We must wait until all data are gone */
928 while(!(inb(iobase+UART_LSR) & UART_LSR_TEMT))
929 IRDA_DEBUG(1, "%s(), UART_LSR_THRE\n", __FUNCTION__ );
930
931 IRDA_DEBUG(1, "%s(), Changing speed! self->new_speed = %d\n", __FUNCTION__ , self->new_speed);
932 ali_ircc_change_speed(self, self->new_speed);
933 self->new_speed = 0;
934
935 // benjamin 2000/11/10 06:32PM
936 if (self->io.speed > 115200)
937 {
938 IRDA_DEBUG(2, "%s(), ali_ircc_change_speed from UART_LSR_TEMT \n", __FUNCTION__ );
939
940 self->ier = IER_EOM;
941 // SetCOMInterrupts(self, TRUE);
942 return;
943 }
944 }
945 else
946 {
947 netif_wake_queue(self->netdev);
948 }
949
950 self->stats.tx_packets++;
951
952 /* Turn on receive interrupts */
953 outb(UART_IER_RDI, iobase+UART_IER);
954 }
955
956 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
957 }
958
959 static void ali_ircc_change_speed(struct ali_ircc_cb *self, __u32 baud)
960 {
961 struct net_device *dev = self->netdev;
962 int iobase;
963
964 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
965
966 IRDA_DEBUG(2, "%s(), setting speed = %d \n", __FUNCTION__ , baud);
967
968 /* This function *must* be called with irq off and spin-lock.
969 * - Jean II */
970
971 iobase = self->io.fir_base;
972
973 SetCOMInterrupts(self, FALSE); // 2000/11/24 11:43AM
974
975 /* Go to MIR, FIR Speed */
976 if (baud > 115200)
977 {
978
979
980 ali_ircc_fir_change_speed(self, baud);
981
982 /* Install FIR xmit handler*/
983 dev->hard_start_xmit = ali_ircc_fir_hard_xmit;
984
985 /* Enable Interuupt */
986 self->ier = IER_EOM; // benjamin 2000/11/20 07:24PM
987
988 /* Be ready for incomming frames */
989 ali_ircc_dma_receive(self); // benajmin 2000/11/8 07:46PM not complete
990 }
991 /* Go to SIR Speed */
992 else
993 {
994 ali_ircc_sir_change_speed(self, baud);
995
996 /* Install SIR xmit handler*/
997 dev->hard_start_xmit = ali_ircc_sir_hard_xmit;
998 }
999
1000
1001 SetCOMInterrupts(self, TRUE); // 2000/11/24 11:43AM
1002
1003 netif_wake_queue(self->netdev);
1004
1005 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1006 }
1007
1008 static void ali_ircc_fir_change_speed(struct ali_ircc_cb *priv, __u32 baud)
1009 {
1010
1011 int iobase;
1012 struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
1013 struct net_device *dev;
1014
1015 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1016
1017 IRDA_ASSERT(self != NULL, return;);
1018
1019 dev = self->netdev;
1020 iobase = self->io.fir_base;
1021
1022 IRDA_DEBUG(1, "%s(), self->io.speed = %d, change to speed = %d\n", __FUNCTION__ ,self->io.speed,baud);
1023
1024 /* Come from SIR speed */
1025 if(self->io.speed <=115200)
1026 {
1027 SIR2FIR(iobase);
1028 }
1029
1030 /* Update accounting for new speed */
1031 self->io.speed = baud;
1032
1033 // Set Dongle Speed mode
1034 ali_ircc_change_dongle_speed(self, baud);
1035
1036 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1037 }
1038
1039 /*
1040 * Function ali_sir_change_speed (self, speed)
1041 *
1042 * Set speed of IrDA port to specified baudrate
1043 *
1044 */
1045 static void ali_ircc_sir_change_speed(struct ali_ircc_cb *priv, __u32 speed)
1046 {
1047 struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
1048 unsigned long flags;
1049 int iobase;
1050 int fcr; /* FIFO control reg */
1051 int lcr; /* Line control reg */
1052 int divisor;
1053
1054 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1055
1056 IRDA_DEBUG(1, "%s(), Setting speed to: %d\n", __FUNCTION__ , speed);
1057
1058 IRDA_ASSERT(self != NULL, return;);
1059
1060 iobase = self->io.sir_base;
1061
1062 /* Come from MIR or FIR speed */
1063 if(self->io.speed >115200)
1064 {
1065 // Set Dongle Speed mode first
1066 ali_ircc_change_dongle_speed(self, speed);
1067
1068 FIR2SIR(iobase);
1069 }
1070
1071 // Clear Line and Auxiluary status registers 2000/11/24 11:47AM
1072
1073 inb(iobase+UART_LSR);
1074 inb(iobase+UART_SCR);
1075
1076 /* Update accounting for new speed */
1077 self->io.speed = speed;
1078
1079 spin_lock_irqsave(&self->lock, flags);
1080
1081 divisor = 115200/speed;
1082
1083 fcr = UART_FCR_ENABLE_FIFO;
1084
1085 /*
1086 * Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and
1087 * almost 1,7 ms at 19200 bps. At speeds above that we can just forget
1088 * about this timeout since it will always be fast enough.
1089 */
1090 if (self->io.speed < 38400)
1091 fcr |= UART_FCR_TRIGGER_1;
1092 else
1093 fcr |= UART_FCR_TRIGGER_14;
1094
1095 /* IrDA ports use 8N1 */
1096 lcr = UART_LCR_WLEN8;
1097
1098 outb(UART_LCR_DLAB | lcr, iobase+UART_LCR); /* Set DLAB */
1099 outb(divisor & 0xff, iobase+UART_DLL); /* Set speed */
1100 outb(divisor >> 8, iobase+UART_DLM);
1101 outb(lcr, iobase+UART_LCR); /* Set 8N1 */
1102 outb(fcr, iobase+UART_FCR); /* Enable FIFO's */
1103
1104 /* without this, the conection will be broken after come back from FIR speed,
1105 but with this, the SIR connection is harder to established */
1106 outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase+UART_MCR);
1107
1108 spin_unlock_irqrestore(&self->lock, flags);
1109
1110 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1111 }
1112
1113 static void ali_ircc_change_dongle_speed(struct ali_ircc_cb *priv, int speed)
1114 {
1115
1116 struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
1117 int iobase,dongle_id;
1118 int tmp = 0;
1119
1120 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1121
1122 iobase = self->io.fir_base; /* or iobase = self->io.sir_base; */
1123 dongle_id = self->io.dongle_id;
1124
1125 /* We are already locked, no need to do it again */
1126
1127 IRDA_DEBUG(1, "%s(), Set Speed for %s , Speed = %d\n", __FUNCTION__ , dongle_types[dongle_id], speed);
1128
1129 switch_bank(iobase, BANK2);
1130 tmp = inb(iobase+FIR_IRDA_CR);
1131
1132 /* IBM type dongle */
1133 if(dongle_id == 0)
1134 {
1135 if(speed == 4000000)
1136 {
1137 // __ __
1138 // SD/MODE __| |__ __
1139 // __ __
1140 // IRTX __ __| |__
1141 // T1 T2 T3 T4 T5
1142
1143 tmp &= ~IRDA_CR_HDLC; // HDLC=0
1144 tmp |= IRDA_CR_CRC; // CRC=1
1145
1146 switch_bank(iobase, BANK2);
1147 outb(tmp, iobase+FIR_IRDA_CR);
1148
1149 // T1 -> SD/MODE:0 IRTX:0
1150 tmp &= ~0x09;
1151 tmp |= 0x02;
1152 outb(tmp, iobase+FIR_IRDA_CR);
1153 udelay(2);
1154
1155 // T2 -> SD/MODE:1 IRTX:0
1156 tmp &= ~0x01;
1157 tmp |= 0x0a;
1158 outb(tmp, iobase+FIR_IRDA_CR);
1159 udelay(2);
1160
1161 // T3 -> SD/MODE:1 IRTX:1
1162 tmp |= 0x0b;
1163 outb(tmp, iobase+FIR_IRDA_CR);
1164 udelay(2);
1165
1166 // T4 -> SD/MODE:0 IRTX:1
1167 tmp &= ~0x08;
1168 tmp |= 0x03;
1169 outb(tmp, iobase+FIR_IRDA_CR);
1170 udelay(2);
1171
1172 // T5 -> SD/MODE:0 IRTX:0
1173 tmp &= ~0x09;
1174 tmp |= 0x02;
1175 outb(tmp, iobase+FIR_IRDA_CR);
1176 udelay(2);
1177
1178 // reset -> Normal TX output Signal
1179 outb(tmp & ~0x02, iobase+FIR_IRDA_CR);
1180 }
1181 else /* speed <=1152000 */
1182 {
1183 // __
1184 // SD/MODE __| |__
1185 //
1186 // IRTX ________
1187 // T1 T2 T3
1188
1189 /* MIR 115200, 57600 */
1190 if (speed==1152000)
1191 {
1192 tmp |= 0xA0; //HDLC=1, 1.152Mbps=1
1193 }
1194 else
1195 {
1196 tmp &=~0x80; //HDLC 0.576Mbps
1197 tmp |= 0x20; //HDLC=1,
1198 }
1199
1200 tmp |= IRDA_CR_CRC; // CRC=1
1201
1202 switch_bank(iobase, BANK2);
1203 outb(tmp, iobase+FIR_IRDA_CR);
1204
1205 /* MIR 115200, 57600 */
1206
1207 //switch_bank(iobase, BANK2);
1208 // T1 -> SD/MODE:0 IRTX:0
1209 tmp &= ~0x09;
1210 tmp |= 0x02;
1211 outb(tmp, iobase+FIR_IRDA_CR);
1212 udelay(2);
1213
1214 // T2 -> SD/MODE:1 IRTX:0
1215 tmp &= ~0x01;
1216 tmp |= 0x0a;
1217 outb(tmp, iobase+FIR_IRDA_CR);
1218
1219 // T3 -> SD/MODE:0 IRTX:0
1220 tmp &= ~0x09;
1221 tmp |= 0x02;
1222 outb(tmp, iobase+FIR_IRDA_CR);
1223 udelay(2);
1224
1225 // reset -> Normal TX output Signal
1226 outb(tmp & ~0x02, iobase+FIR_IRDA_CR);
1227 }
1228 }
1229 else if (dongle_id == 1) /* HP HDSL-3600 */
1230 {
1231 switch(speed)
1232 {
1233 case 4000000:
1234 tmp &= ~IRDA_CR_HDLC; // HDLC=0
1235 break;
1236
1237 case 1152000:
1238 tmp |= 0xA0; // HDLC=1, 1.152Mbps=1
1239 break;
1240
1241 case 576000:
1242 tmp &=~0x80; // HDLC 0.576Mbps
1243 tmp |= 0x20; // HDLC=1,
1244 break;
1245 }
1246
1247 tmp |= IRDA_CR_CRC; // CRC=1
1248
1249 switch_bank(iobase, BANK2);
1250 outb(tmp, iobase+FIR_IRDA_CR);
1251 }
1252 else /* HP HDSL-1100 */
1253 {
1254 if(speed <= 115200) /* SIR */
1255 {
1256
1257 tmp &= ~IRDA_CR_FIR_SIN; // HP sin select = 0
1258
1259 switch_bank(iobase, BANK2);
1260 outb(tmp, iobase+FIR_IRDA_CR);
1261 }
1262 else /* MIR FIR */
1263 {
1264
1265 switch(speed)
1266 {
1267 case 4000000:
1268 tmp &= ~IRDA_CR_HDLC; // HDLC=0
1269 break;
1270
1271 case 1152000:
1272 tmp |= 0xA0; // HDLC=1, 1.152Mbps=1
1273 break;
1274
1275 case 576000:
1276 tmp &=~0x80; // HDLC 0.576Mbps
1277 tmp |= 0x20; // HDLC=1,
1278 break;
1279 }
1280
1281 tmp |= IRDA_CR_CRC; // CRC=1
1282 tmp |= IRDA_CR_FIR_SIN; // HP sin select = 1
1283
1284 switch_bank(iobase, BANK2);
1285 outb(tmp, iobase+FIR_IRDA_CR);
1286 }
1287 }
1288
1289 switch_bank(iobase, BANK0);
1290
1291 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1292 }
1293
1294 /*
1295 * Function ali_ircc_sir_write (driver)
1296 *
1297 * Fill Tx FIFO with transmit data
1298 *
1299 */
1300 static int ali_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len)
1301 {
1302 int actual = 0;
1303
1304 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1305
1306 /* Tx FIFO should be empty! */
1307 if (!(inb(iobase+UART_LSR) & UART_LSR_THRE)) {
1308 IRDA_DEBUG(0, "%s(), failed, fifo not empty!\n", __FUNCTION__ );
1309 return 0;
1310 }
1311
1312 /* Fill FIFO with current frame */
1313 while ((fifo_size-- > 0) && (actual < len)) {
1314 /* Transmit next byte */
1315 outb(buf[actual], iobase+UART_TX);
1316
1317 actual++;
1318 }
1319
1320 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1321 return actual;
1322 }
1323
1324 /*
1325 * Function ali_ircc_net_open (dev)
1326 *
1327 * Start the device
1328 *
1329 */
1330 static int ali_ircc_net_open(struct net_device *dev)
1331 {
1332 struct ali_ircc_cb *self;
1333 int iobase;
1334 char hwname[32];
1335
1336 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1337
1338 IRDA_ASSERT(dev != NULL, return -1;);
1339
1340 self = (struct ali_ircc_cb *) dev->priv;
1341
1342 IRDA_ASSERT(self != NULL, return 0;);
1343
1344 iobase = self->io.fir_base;
1345
1346 /* Request IRQ and install Interrupt Handler */
1347 if (request_irq(self->io.irq, ali_ircc_interrupt, 0, dev->name, dev))
1348 {
1349 IRDA_WARNING("%s, unable to allocate irq=%d\n",
1350 ALI_IRCC_DRIVER_NAME,
1351 self->io.irq);
1352 return -EAGAIN;
1353 }
1354
1355 /*
1356 * Always allocate the DMA channel after the IRQ, and clean up on
1357 * failure.
1358 */
1359 if (request_dma(self->io.dma, dev->name)) {
1360 IRDA_WARNING("%s, unable to allocate dma=%d\n",
1361 ALI_IRCC_DRIVER_NAME,
1362 self->io.dma);
1363 free_irq(self->io.irq, self);
1364 return -EAGAIN;
1365 }
1366
1367 /* Turn on interrups */
1368 outb(UART_IER_RDI , iobase+UART_IER);
1369
1370 /* Ready to play! */
1371 netif_start_queue(dev); //benjamin by irport
1372
1373 /* Give self a hardware name */
1374 sprintf(hwname, "ALI-FIR @ 0x%03x", self->io.fir_base);
1375
1376 /*
1377 * Open new IrLAP layer instance, now that everything should be
1378 * initialized properly
1379 */
1380 self->irlap = irlap_open(dev, &self->qos, hwname);
1381
1382 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1383
1384 return 0;
1385 }
1386
1387 /*
1388 * Function ali_ircc_net_close (dev)
1389 *
1390 * Stop the device
1391 *
1392 */
1393 static int ali_ircc_net_close(struct net_device *dev)
1394 {
1395
1396 struct ali_ircc_cb *self;
1397 //int iobase;
1398
1399 IRDA_DEBUG(4, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1400
1401 IRDA_ASSERT(dev != NULL, return -1;);
1402
1403 self = (struct ali_ircc_cb *) dev->priv;
1404 IRDA_ASSERT(self != NULL, return 0;);
1405
1406 /* Stop device */
1407 netif_stop_queue(dev);
1408
1409 /* Stop and remove instance of IrLAP */
1410 if (self->irlap)
1411 irlap_close(self->irlap);
1412 self->irlap = NULL;
1413
1414 disable_dma(self->io.dma);
1415
1416 /* Disable interrupts */
1417 SetCOMInterrupts(self, FALSE);
1418
1419 free_irq(self->io.irq, dev);
1420 free_dma(self->io.dma);
1421
1422 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1423
1424 return 0;
1425 }
1426
1427 /*
1428 * Function ali_ircc_fir_hard_xmit (skb, dev)
1429 *
1430 * Transmit the frame
1431 *
1432 */
1433 static int ali_ircc_fir_hard_xmit(struct sk_buff *skb, struct net_device *dev)
1434 {
1435 struct ali_ircc_cb *self;
1436 unsigned long flags;
1437 int iobase;
1438 __u32 speed;
1439 int mtt, diff;
1440
1441 IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );
1442
1443 self = (struct ali_ircc_cb *) dev->priv;
1444 iobase = self->io.fir_base;
1445
1446 netif_stop_queue(dev);
1447
1448 /* Make sure tests *& speed change are atomic */
1449 spin_lock_irqsave(&self->lock, flags);
1450
1451 /* Note : you should make sure that speed changes are not going
1452 * to corrupt any outgoing frame. Look at nsc-ircc for the gory
1453 * details - Jean II */
1454
1455 /* Check if we need to change the speed */
1456 speed = irda_get_next_speed(skb);
1457 if ((speed != self->io.speed) && (speed != -1)) {
1458 /* Check for empty frame */
1459 if (!skb->len) {
1460 ali_ircc_change_speed(self, speed);
1461 dev->trans_start = jiffies;
1462 spin_unlock_irqrestore(&self->lock, flags);
1463 dev_kfree_skb(skb);
1464 return 0;
1465 } else
1466 self->new_speed = speed;
1467 }
1468
1469 /* Register and copy this frame to DMA memory */
1470 self->tx_fifo.queue[self->tx_fifo.free].start = self->tx_fifo.tail;
1471 self->tx_fifo.queue[self->tx_fifo.free].len = skb->len;
1472 self->tx_fifo.tail += skb->len;
1473
1474 self->stats.tx_bytes += skb->len;
1475
1476 memcpy(self->tx_fifo.queue[self->tx_fifo.free].start, skb->data,
1477 skb->len);
1478
1479 self->tx_fifo.len++;
1480 self->tx_fifo.free++;
1481
1482 /* Start transmit only if there is currently no transmit going on */
1483 if (self->tx_fifo.len == 1)
1484 {
1485 /* Check if we must wait the min turn time or not */
1486 mtt = irda_get_mtt(skb);
1487
1488 if (mtt)
1489 {
1490 /* Check how much time we have used already */
1491 do_gettimeofday(&self->now);
1492
1493 diff = self->now.tv_usec - self->stamp.tv_usec;
1494 /* self->stamp is set from ali_ircc_dma_receive_complete() */
1495
1496 IRDA_DEBUG(1, "%s(), ******* diff = %d ******* \n", __FUNCTION__ , diff);
1497
1498 if (diff < 0)
1499 diff += 1000000;
1500
1501 /* Check if the mtt is larger than the time we have
1502 * already used by all the protocol processing
1503 */
1504 if (mtt > diff)
1505 {
1506 mtt -= diff;
1507
1508 /*
1509 * Use timer if delay larger than 1000 us, and
1510 * use udelay for smaller values which should
1511 * be acceptable
1512 */
1513 if (mtt > 500)
1514 {
1515 /* Adjust for timer resolution */
1516 mtt = (mtt+250) / 500; /* 4 discard, 5 get advanced, Let's round off */
1517
1518 IRDA_DEBUG(1, "%s(), ************** mtt = %d ***********\n", __FUNCTION__ , mtt);
1519
1520 /* Setup timer */
1521 if (mtt == 1) /* 500 us */
1522 {
1523 switch_bank(iobase, BANK1);
1524 outb(TIMER_IIR_500, iobase+FIR_TIMER_IIR);
1525 }
1526 else if (mtt == 2) /* 1 ms */
1527 {
1528 switch_bank(iobase, BANK1);
1529 outb(TIMER_IIR_1ms, iobase+FIR_TIMER_IIR);
1530 }
1531 else /* > 2ms -> 4ms */
1532 {
1533 switch_bank(iobase, BANK1);
1534 outb(TIMER_IIR_2ms, iobase+FIR_TIMER_IIR);
1535 }
1536
1537
1538 /* Start timer */
1539 outb(inb(iobase+FIR_CR) | CR_TIMER_EN, iobase+FIR_CR);
1540 self->io.direction = IO_XMIT;
1541
1542 /* Enable timer interrupt */
1543 self->ier = IER_TIMER;
1544 SetCOMInterrupts(self, TRUE);
1545
1546 /* Timer will take care of the rest */
1547 goto out;
1548 }
1549 else
1550 udelay(mtt);
1551 } // if (if (mtt > diff)
1552 }// if (mtt)
1553
1554 /* Enable EOM interrupt */
1555 self->ier = IER_EOM;
1556 SetCOMInterrupts(self, TRUE);
1557
1558 /* Transmit frame */
1559 ali_ircc_dma_xmit(self);
1560 } // if (self->tx_fifo.len == 1)
1561
1562 out:
1563
1564 /* Not busy transmitting anymore if window is not full */
1565 if (self->tx_fifo.free < MAX_TX_WINDOW)
1566 netif_wake_queue(self->netdev);
1567
1568 /* Restore bank register */
1569 switch_bank(iobase, BANK0);
1570
1571 dev->trans_start = jiffies;
1572 spin_unlock_irqrestore(&self->lock, flags);
1573 dev_kfree_skb(skb);
1574
1575 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1576 return 0;
1577 }
1578
1579
1580 static void ali_ircc_dma_xmit(struct ali_ircc_cb *self)
1581 {
1582 int iobase, tmp;
1583 unsigned char FIFO_OPTI, Hi, Lo;
1584
1585
1586 IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );
1587
1588 iobase = self->io.fir_base;
1589
1590 /* FIFO threshold , this method comes from NDIS5 code */
1591
1592 if(self->tx_fifo.queue[self->tx_fifo.ptr].len < TX_FIFO_Threshold)
1593 FIFO_OPTI = self->tx_fifo.queue[self->tx_fifo.ptr].len-1;
1594 else
1595 FIFO_OPTI = TX_FIFO_Threshold;
1596
1597 /* Disable DMA */
1598 switch_bank(iobase, BANK1);
1599 outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1600
1601 self->io.direction = IO_XMIT;
1602
1603 irda_setup_dma(self->io.dma,
1604 ((u8 *)self->tx_fifo.queue[self->tx_fifo.ptr].start -
1605 self->tx_buff.head) + self->tx_buff_dma,
1606 self->tx_fifo.queue[self->tx_fifo.ptr].len,
1607 DMA_TX_MODE);
1608
1609 /* Reset Tx FIFO */
1610 switch_bank(iobase, BANK0);
1611 outb(LCR_A_FIFO_RESET, iobase+FIR_LCR_A);
1612
1613 /* Set Tx FIFO threshold */
1614 if (self->fifo_opti_buf!=FIFO_OPTI)
1615 {
1616 switch_bank(iobase, BANK1);
1617 outb(FIFO_OPTI, iobase+FIR_FIFO_TR) ;
1618 self->fifo_opti_buf=FIFO_OPTI;
1619 }
1620
1621 /* Set Tx DMA threshold */
1622 switch_bank(iobase, BANK1);
1623 outb(TX_DMA_Threshold, iobase+FIR_DMA_TR);
1624
1625 /* Set max Tx frame size */
1626 Hi = (self->tx_fifo.queue[self->tx_fifo.ptr].len >> 8) & 0x0f;
1627 Lo = self->tx_fifo.queue[self->tx_fifo.ptr].len & 0xff;
1628 switch_bank(iobase, BANK2);
1629 outb(Hi, iobase+FIR_TX_DSR_HI);
1630 outb(Lo, iobase+FIR_TX_DSR_LO);
1631
1632 /* Disable SIP , Disable Brick Wall (we don't support in TX mode), Change to TX mode */
1633 switch_bank(iobase, BANK0);
1634 tmp = inb(iobase+FIR_LCR_B);
1635 tmp &= ~0x20; // Disable SIP
1636 outb(((unsigned char)(tmp & 0x3f) | LCR_B_TX_MODE) & ~LCR_B_BW, iobase+FIR_LCR_B);
1637 IRDA_DEBUG(1, "%s(), ******* Change to TX mode: FIR_LCR_B = 0x%x ******* \n", __FUNCTION__ , inb(iobase+FIR_LCR_B));
1638
1639 outb(0, iobase+FIR_LSR);
1640
1641 /* Enable DMA and Burst Mode */
1642 switch_bank(iobase, BANK1);
1643 outb(inb(iobase+FIR_CR) | CR_DMA_EN | CR_DMA_BURST, iobase+FIR_CR);
1644
1645 switch_bank(iobase, BANK0);
1646
1647 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1648 }
1649
1650 static int ali_ircc_dma_xmit_complete(struct ali_ircc_cb *self)
1651 {
1652 int iobase;
1653 int ret = TRUE;
1654
1655 IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );
1656
1657 iobase = self->io.fir_base;
1658
1659 /* Disable DMA */
1660 switch_bank(iobase, BANK1);
1661 outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1662
1663 /* Check for underrun! */
1664 switch_bank(iobase, BANK0);
1665 if((inb(iobase+FIR_LSR) & LSR_FRAME_ABORT) == LSR_FRAME_ABORT)
1666
1667 {
1668 IRDA_ERROR("%s(), ********* LSR_FRAME_ABORT *********\n", __FUNCTION__);
1669 self->stats.tx_errors++;
1670 self->stats.tx_fifo_errors++;
1671 }
1672 else
1673 {
1674 self->stats.tx_packets++;
1675 }
1676
1677 /* Check if we need to change the speed */
1678 if (self->new_speed)
1679 {
1680 ali_ircc_change_speed(self, self->new_speed);
1681 self->new_speed = 0;
1682 }
1683
1684 /* Finished with this frame, so prepare for next */
1685 self->tx_fifo.ptr++;
1686 self->tx_fifo.len--;
1687
1688 /* Any frames to be sent back-to-back? */
1689 if (self->tx_fifo.len)
1690 {
1691 ali_ircc_dma_xmit(self);
1692
1693 /* Not finished yet! */
1694 ret = FALSE;
1695 }
1696 else
1697 { /* Reset Tx FIFO info */
1698 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1699 self->tx_fifo.tail = self->tx_buff.head;
1700 }
1701
1702 /* Make sure we have room for more frames */
1703 if (self->tx_fifo.free < MAX_TX_WINDOW) {
1704 /* Not busy transmitting anymore */
1705 /* Tell the network layer, that we can accept more frames */
1706 netif_wake_queue(self->netdev);
1707 }
1708
1709 switch_bank(iobase, BANK0);
1710
1711 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1712 return ret;
1713 }
1714
1715 /*
1716 * Function ali_ircc_dma_receive (self)
1717 *
1718 * Get ready for receiving a frame. The device will initiate a DMA
1719 * if it starts to receive a frame.
1720 *
1721 */
1722 static int ali_ircc_dma_receive(struct ali_ircc_cb *self)
1723 {
1724 int iobase, tmp;
1725
1726 IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );
1727
1728 iobase = self->io.fir_base;
1729
1730 /* Reset Tx FIFO info */
1731 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1732 self->tx_fifo.tail = self->tx_buff.head;
1733
1734 /* Disable DMA */
1735 switch_bank(iobase, BANK1);
1736 outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1737
1738 /* Reset Message Count */
1739 switch_bank(iobase, BANK0);
1740 outb(0x07, iobase+FIR_LSR);
1741
1742 self->rcvFramesOverflow = FALSE;
1743
1744 self->LineStatus = inb(iobase+FIR_LSR) ;
1745
1746 /* Reset Rx FIFO info */
1747 self->io.direction = IO_RECV;
1748 self->rx_buff.data = self->rx_buff.head;
1749
1750 /* Reset Rx FIFO */
1751 // switch_bank(iobase, BANK0);
1752 outb(LCR_A_FIFO_RESET, iobase+FIR_LCR_A);
1753
1754 self->st_fifo.len = self->st_fifo.pending_bytes = 0;
1755 self->st_fifo.tail = self->st_fifo.head = 0;
1756
1757 irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize,
1758 DMA_RX_MODE);
1759
1760 /* Set Receive Mode,Brick Wall */
1761 //switch_bank(iobase, BANK0);
1762 tmp = inb(iobase+FIR_LCR_B);
1763 outb((unsigned char)(tmp &0x3f) | LCR_B_RX_MODE | LCR_B_BW , iobase + FIR_LCR_B); // 2000/12/1 05:16PM
1764 IRDA_DEBUG(1, "%s(), *** Change To RX mode: FIR_LCR_B = 0x%x *** \n", __FUNCTION__ , inb(iobase+FIR_LCR_B));
1765
1766 /* Set Rx Threshold */
1767 switch_bank(iobase, BANK1);
1768 outb(RX_FIFO_Threshold, iobase+FIR_FIFO_TR);
1769 outb(RX_DMA_Threshold, iobase+FIR_DMA_TR);
1770
1771 /* Enable DMA and Burst Mode */
1772 // switch_bank(iobase, BANK1);
1773 outb(CR_DMA_EN | CR_DMA_BURST, iobase+FIR_CR);
1774
1775 switch_bank(iobase, BANK0);
1776 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1777 return 0;
1778 }
1779
1780 static int ali_ircc_dma_receive_complete(struct ali_ircc_cb *self)
1781 {
1782 struct st_fifo *st_fifo;
1783 struct sk_buff *skb;
1784 __u8 status, MessageCount;
1785 int len, i, iobase, val;
1786
1787 IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );
1788
1789 st_fifo = &self->st_fifo;
1790 iobase = self->io.fir_base;
1791
1792 switch_bank(iobase, BANK0);
1793 MessageCount = inb(iobase+ FIR_LSR)&0x07;
1794
1795 if (MessageCount > 0)
1796 IRDA_DEBUG(0, "%s(), Messsage count = %d,\n", __FUNCTION__ , MessageCount);
1797
1798 for (i=0; i<=MessageCount; i++)
1799 {
1800 /* Bank 0 */
1801 switch_bank(iobase, BANK0);
1802 status = inb(iobase+FIR_LSR);
1803
1804 switch_bank(iobase, BANK2);
1805 len = inb(iobase+FIR_RX_DSR_HI) & 0x0f;
1806 len = len << 8;
1807 len |= inb(iobase+FIR_RX_DSR_LO);
1808
1809 IRDA_DEBUG(1, "%s(), RX Length = 0x%.2x,\n", __FUNCTION__ , len);
1810 IRDA_DEBUG(1, "%s(), RX Status = 0x%.2x,\n", __FUNCTION__ , status);
1811
1812 if (st_fifo->tail >= MAX_RX_WINDOW) {
1813 IRDA_DEBUG(0, "%s(), window is full!\n", __FUNCTION__ );
1814 continue;
1815 }
1816
1817 st_fifo->entries[st_fifo->tail].status = status;
1818 st_fifo->entries[st_fifo->tail].len = len;
1819 st_fifo->pending_bytes += len;
1820 st_fifo->tail++;
1821 st_fifo->len++;
1822 }
1823
1824 for (i=0; i<=MessageCount; i++)
1825 {
1826 /* Get first entry */
1827 status = st_fifo->entries[st_fifo->head].status;
1828 len = st_fifo->entries[st_fifo->head].len;
1829 st_fifo->pending_bytes -= len;
1830 st_fifo->head++;
1831 st_fifo->len--;
1832
1833 /* Check for errors */
1834 if ((status & 0xd8) || self->rcvFramesOverflow || (len==0))
1835 {
1836 IRDA_DEBUG(0,"%s(), ************* RX Errors ************ \n", __FUNCTION__ );
1837
1838 /* Skip frame */
1839 self->stats.rx_errors++;
1840
1841 self->rx_buff.data += len;
1842
1843 if (status & LSR_FIFO_UR)
1844 {
1845 self->stats.rx_frame_errors++;
1846 IRDA_DEBUG(0,"%s(), ************* FIFO Errors ************ \n", __FUNCTION__ );
1847 }
1848 if (status & LSR_FRAME_ERROR)
1849 {
1850 self->stats.rx_frame_errors++;
1851 IRDA_DEBUG(0,"%s(), ************* FRAME Errors ************ \n", __FUNCTION__ );
1852 }
1853
1854 if (status & LSR_CRC_ERROR)
1855 {
1856 self->stats.rx_crc_errors++;
1857 IRDA_DEBUG(0,"%s(), ************* CRC Errors ************ \n", __FUNCTION__ );
1858 }
1859
1860 if(self->rcvFramesOverflow)
1861 {
1862 self->stats.rx_frame_errors++;
1863 IRDA_DEBUG(0,"%s(), ************* Overran DMA buffer ************ \n", __FUNCTION__ );
1864 }
1865 if(len == 0)
1866 {
1867 self->stats.rx_frame_errors++;
1868 IRDA_DEBUG(0,"%s(), ********** Receive Frame Size = 0 ********* \n", __FUNCTION__ );
1869 }
1870 }
1871 else
1872 {
1873
1874 if (st_fifo->pending_bytes < 32)
1875 {
1876 switch_bank(iobase, BANK0);
1877 val = inb(iobase+FIR_BSR);
1878 if ((val& BSR_FIFO_NOT_EMPTY)== 0x80)
1879 {
1880 IRDA_DEBUG(0, "%s(), ************* BSR_FIFO_NOT_EMPTY ************ \n", __FUNCTION__ );
1881
1882 /* Put this entry back in fifo */
1883 st_fifo->head--;
1884 st_fifo->len++;
1885 st_fifo->pending_bytes += len;
1886 st_fifo->entries[st_fifo->head].status = status;
1887 st_fifo->entries[st_fifo->head].len = len;
1888
1889 /*
1890 * DMA not finished yet, so try again
1891 * later, set timer value, resolution
1892 * 500 us
1893 */
1894
1895 switch_bank(iobase, BANK1);
1896 outb(TIMER_IIR_500, iobase+FIR_TIMER_IIR); // 2001/1/2 05:07PM
1897
1898 /* Enable Timer */
1899 outb(inb(iobase+FIR_CR) | CR_TIMER_EN, iobase+FIR_CR);
1900
1901 return FALSE; /* I'll be back! */
1902 }
1903 }
1904
1905 /*
1906 * Remember the time we received this frame, so we can
1907 * reduce the min turn time a bit since we will know
1908 * how much time we have used for protocol processing
1909 */
1910 do_gettimeofday(&self->stamp);
1911
1912 skb = dev_alloc_skb(len+1);
1913 if (skb == NULL)
1914 {
1915 IRDA_WARNING("%s(), memory squeeze, "
1916 "dropping frame.\n",
1917 __FUNCTION__);
1918 self->stats.rx_dropped++;
1919
1920 return FALSE;
1921 }
1922
1923 /* Make sure IP header gets aligned */
1924 skb_reserve(skb, 1);
1925
1926 /* Copy frame without CRC, CRC is removed by hardware*/
1927 skb_put(skb, len);
1928 memcpy(skb->data, self->rx_buff.data, len);
1929
1930 /* Move to next frame */
1931 self->rx_buff.data += len;
1932 self->stats.rx_bytes += len;
1933 self->stats.rx_packets++;
1934
1935 skb->dev = self->netdev;
1936 skb->mac.raw = skb->data;
1937 skb->protocol = htons(ETH_P_IRDA);
1938 netif_rx(skb);
1939 self->netdev->last_rx = jiffies;
1940 }
1941 }
1942
1943 switch_bank(iobase, BANK0);
1944
1945 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1946 return TRUE;
1947 }
1948
1949
1950
1951 /*
1952 * Function ali_ircc_sir_hard_xmit (skb, dev)
1953 *
1954 * Transmit the frame!
1955 *
1956 */
1957 static int ali_ircc_sir_hard_xmit(struct sk_buff *skb, struct net_device *dev)
1958 {
1959 struct ali_ircc_cb *self;
1960 unsigned long flags;
1961 int iobase;
1962 __u32 speed;
1963
1964 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1965
1966 IRDA_ASSERT(dev != NULL, return 0;);
1967
1968 self = (struct ali_ircc_cb *) dev->priv;
1969 IRDA_ASSERT(self != NULL, return 0;);
1970
1971 iobase = self->io.sir_base;
1972
1973 netif_stop_queue(dev);
1974
1975 /* Make sure tests *& speed change are atomic */
1976 spin_lock_irqsave(&self->lock, flags);
1977
1978 /* Note : you should make sure that speed changes are not going
1979 * to corrupt any outgoing frame. Look at nsc-ircc for the gory
1980 * details - Jean II */
1981
1982 /* Check if we need to change the speed */
1983 speed = irda_get_next_speed(skb);
1984 if ((speed != self->io.speed) && (speed != -1)) {
1985 /* Check for empty frame */
1986 if (!skb->len) {
1987 ali_ircc_change_speed(self, speed);
1988 dev->trans_start = jiffies;
1989 spin_unlock_irqrestore(&self->lock, flags);
1990 dev_kfree_skb(skb);
1991 return 0;
1992 } else
1993 self->new_speed = speed;
1994 }
1995
1996 /* Init tx buffer */
1997 self->tx_buff.data = self->tx_buff.head;
1998
1999 /* Copy skb to tx_buff while wrapping, stuffing and making CRC */
2000 self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data,
2001 self->tx_buff.truesize);
2002
2003 self->stats.tx_bytes += self->tx_buff.len;
2004
2005 /* Turn on transmit finished interrupt. Will fire immediately! */
2006 outb(UART_IER_THRI, iobase+UART_IER);
2007
2008 dev->trans_start = jiffies;
2009 spin_unlock_irqrestore(&self->lock, flags);
2010
2011 dev_kfree_skb(skb);
2012
2013 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2014
2015 return 0;
2016 }
2017
2018
2019 /*
2020 * Function ali_ircc_net_ioctl (dev, rq, cmd)
2021 *
2022 * Process IOCTL commands for this device
2023 *
2024 */
2025 static int ali_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2026 {
2027 struct if_irda_req *irq = (struct if_irda_req *) rq;
2028 struct ali_ircc_cb *self;
2029 unsigned long flags;
2030 int ret = 0;
2031
2032 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
2033
2034 IRDA_ASSERT(dev != NULL, return -1;);
2035
2036 self = dev->priv;
2037
2038 IRDA_ASSERT(self != NULL, return -1;);
2039
2040 IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __FUNCTION__ , dev->name, cmd);
2041
2042 switch (cmd) {
2043 case SIOCSBANDWIDTH: /* Set bandwidth */
2044 IRDA_DEBUG(1, "%s(), SIOCSBANDWIDTH\n", __FUNCTION__ );
2045 /*
2046 * This function will also be used by IrLAP to change the
2047 * speed, so we still must allow for speed change within
2048 * interrupt context.
2049 */
2050 if (!in_interrupt() && !capable(CAP_NET_ADMIN))
2051 return -EPERM;
2052
2053 spin_lock_irqsave(&self->lock, flags);
2054 ali_ircc_change_speed(self, irq->ifr_baudrate);
2055 spin_unlock_irqrestore(&self->lock, flags);
2056 break;
2057 case SIOCSMEDIABUSY: /* Set media busy */
2058 IRDA_DEBUG(1, "%s(), SIOCSMEDIABUSY\n", __FUNCTION__ );
2059 if (!capable(CAP_NET_ADMIN))
2060 return -EPERM;
2061 irda_device_set_media_busy(self->netdev, TRUE);
2062 break;
2063 case SIOCGRECEIVING: /* Check if we are receiving right now */
2064 IRDA_DEBUG(2, "%s(), SIOCGRECEIVING\n", __FUNCTION__ );
2065 /* This is protected */
2066 irq->ifr_receiving = ali_ircc_is_receiving(self);
2067 break;
2068 default:
2069 ret = -EOPNOTSUPP;
2070 }
2071
2072 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2073
2074 return ret;
2075 }
2076
2077 /*
2078 * Function ali_ircc_is_receiving (self)
2079 *
2080 * Return TRUE is we are currently receiving a frame
2081 *
2082 */
2083 static int ali_ircc_is_receiving(struct ali_ircc_cb *self)
2084 {
2085 unsigned long flags;
2086 int status = FALSE;
2087 int iobase;
2088
2089 IRDA_DEBUG(2, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );
2090
2091 IRDA_ASSERT(self != NULL, return FALSE;);
2092
2093 spin_lock_irqsave(&self->lock, flags);
2094
2095 if (self->io.speed > 115200)
2096 {
2097 iobase = self->io.fir_base;
2098
2099 switch_bank(iobase, BANK1);
2100 if((inb(iobase+FIR_FIFO_FR) & 0x3f) != 0)
2101 {
2102 /* We are receiving something */
2103 IRDA_DEBUG(1, "%s(), We are receiving something\n", __FUNCTION__ );
2104 status = TRUE;
2105 }
2106 switch_bank(iobase, BANK0);
2107 }
2108 else
2109 {
2110 status = (self->rx_buff.state != OUTSIDE_FRAME);
2111 }
2112
2113 spin_unlock_irqrestore(&self->lock, flags);
2114
2115 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2116
2117 return status;
2118 }
2119
2120 static struct net_device_stats *ali_ircc_net_get_stats(struct net_device *dev)
2121 {
2122 struct ali_ircc_cb *self = (struct ali_ircc_cb *) dev->priv;
2123
2124 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
2125
2126 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2127
2128 return &self->stats;
2129 }
2130
2131 static int ali_ircc_suspend(struct platform_device *dev, pm_message_t state)
2132 {
2133 struct ali_ircc_cb *self = platform_get_drvdata(dev);
2134
2135 IRDA_MESSAGE("%s, Suspending\n", ALI_IRCC_DRIVER_NAME);
2136
2137 if (self->io.suspended)
2138 return 0;
2139
2140 ali_ircc_net_close(self->netdev);
2141
2142 self->io.suspended = 1;
2143
2144 return 0;
2145 }
2146
2147 static int ali_ircc_resume(struct platform_device *dev)
2148 {
2149 struct ali_ircc_cb *self = platform_get_drvdata(dev);
2150
2151 if (!self->io.suspended)
2152 return 0;
2153
2154 ali_ircc_net_open(self->netdev);
2155
2156 IRDA_MESSAGE("%s, Waking up\n", ALI_IRCC_DRIVER_NAME);
2157
2158 self->io.suspended = 0;
2159
2160 return 0;
2161 }
2162
2163 /* ALi Chip Function */
2164
2165 static void SetCOMInterrupts(struct ali_ircc_cb *self , unsigned char enable)
2166 {
2167
2168 unsigned char newMask;
2169
2170 int iobase = self->io.fir_base; /* or sir_base */
2171
2172 IRDA_DEBUG(2, "%s(), -------- Start -------- ( Enable = %d )\n", __FUNCTION__ , enable);
2173
2174 /* Enable the interrupt which we wish to */
2175 if (enable){
2176 if (self->io.direction == IO_XMIT)
2177 {
2178 if (self->io.speed > 115200) /* FIR, MIR */
2179 {
2180 newMask = self->ier;
2181 }
2182 else /* SIR */
2183 {
2184 newMask = UART_IER_THRI | UART_IER_RDI;
2185 }
2186 }
2187 else {
2188 if (self->io.speed > 115200) /* FIR, MIR */
2189 {
2190 newMask = self->ier;
2191 }
2192 else /* SIR */
2193 {
2194 newMask = UART_IER_RDI;
2195 }
2196 }
2197 }
2198 else /* Disable all the interrupts */
2199 {
2200 newMask = 0x00;
2201
2202 }
2203
2204 //SIR and FIR has different registers
2205 if (self->io.speed > 115200)
2206 {
2207 switch_bank(iobase, BANK0);
2208 outb(newMask, iobase+FIR_IER);
2209 }
2210 else
2211 outb(newMask, iobase+UART_IER);
2212
2213 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2214 }
2215
2216 static void SIR2FIR(int iobase)
2217 {
2218 //unsigned char tmp;
2219
2220 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
2221
2222 /* Already protected (change_speed() or setup()), no need to lock.
2223 * Jean II */
2224
2225 outb(0x28, iobase+UART_MCR);
2226 outb(0x68, iobase+UART_MCR);
2227 outb(0x88, iobase+UART_MCR);
2228
2229 outb(0x60, iobase+FIR_MCR); /* Master Reset */
2230 outb(0x20, iobase+FIR_MCR); /* Master Interrupt Enable */
2231
2232 //tmp = inb(iobase+FIR_LCR_B); /* SIP enable */
2233 //tmp |= 0x20;
2234 //outb(tmp, iobase+FIR_LCR_B);
2235
2236 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2237 }
2238
2239 static void FIR2SIR(int iobase)
2240 {
2241 unsigned char val;
2242
2243 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
2244
2245 /* Already protected (change_speed() or setup()), no need to lock.
2246 * Jean II */
2247
2248 outb(0x20, iobase+FIR_MCR); /* IRQ to low */
2249 outb(0x00, iobase+UART_IER);
2250
2251 outb(0xA0, iobase+FIR_MCR); /* Don't set master reset */
2252 outb(0x00, iobase+UART_FCR);
2253 outb(0x07, iobase+UART_FCR);
2254
2255 val = inb(iobase+UART_RX);
2256 val = inb(iobase+UART_LSR);
2257 val = inb(iobase+UART_MSR);
2258
2259 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2260 }
2261
2262 MODULE_AUTHOR("Benjamin Kong <benjamin_kong@ali.com.tw>");
2263 MODULE_DESCRIPTION("ALi FIR Controller Driver");
2264 MODULE_LICENSE("GPL");
2265
2266
2267 module_param_array(io, int, NULL, 0);
2268 MODULE_PARM_DESC(io, "Base I/O addresses");
2269 module_param_array(irq, int, NULL, 0);
2270 MODULE_PARM_DESC(irq, "IRQ lines");
2271 module_param_array(dma, int, NULL, 0);
2272 MODULE_PARM_DESC(dma, "DMA channels");
2273
2274 module_init(ali_ircc_init);
2275 module_exit(ali_ircc_cleanup);
Linux kernel - Deliverables
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