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netdevice: safe convert to netdev_priv() #part-1
[net-next-2.6.git] / drivers / net / irda / ali-ircc.c
CommitLineData
1da177e4
LT		 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>
898b1d16 37#include <linux/platform_device.h>
1da177e4
LT		 38
39#include <asm/io.h>
40#include <asm/dma.h>
41#include <asm/byteorder.h>
42
1da177e4
LT		 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
898b1d16
SO		 52#define ALI_IRCC_DRIVER_NAME "ali-ircc"
53
54/* Power Management */
55static int ali_ircc_suspend(struct platform_device *dev, pm_message_t state);
56static int ali_ircc_resume(struct platform_device *dev);
57
58static struct platform_driver ali_ircc_driver = {
59 .suspend = ali_ircc_suspend,
60 .resume = ali_ircc_resume,
61 .driver = {
62 .name = ALI_IRCC_DRIVER_NAME,
72abb461 63 .owner = THIS_MODULE,
898b1d16
SO		 64 },
65};
1da177e4
LT		 66
67/* Module parameters */
68static int qos_mtt_bits = 0x07; /* 1 ms or more */
69
70/* Use BIOS settions by default, but user may supply module parameters */
71static unsigned int io[] = { ~0, ~0, ~0, ~0 };
72static unsigned int irq[] = { 0, 0, 0, 0 };
73static unsigned int dma[] = { 0, 0, 0, 0 };
74
75static int ali_ircc_probe_53(ali_chip_t *chip, chipio_t *info);
76static int ali_ircc_init_43(ali_chip_t *chip, chipio_t *info);
77static int ali_ircc_init_53(ali_chip_t *chip, chipio_t *info);
78
79/* These are the currently known ALi sourth-bridge chipsets, the only one difference
80 * is that M1543C doesn't support HP HDSL-3600
81 */
82static ali_chip_t chips[] =
83{
84 { "M1543", { 0x3f0, 0x370 }, 0x51, 0x23, 0x20, 0x43, ali_ircc_probe_53, ali_ircc_init_43 },
85 { "M1535", { 0x3f0, 0x370 }, 0x51, 0x23, 0x20, 0x53, ali_ircc_probe_53, ali_ircc_init_53 },
86 { "M1563", { 0x3f0, 0x370 }, 0x51, 0x23, 0x20, 0x63, ali_ircc_probe_53, ali_ircc_init_53 },
87 { NULL }
88};
89
90/* Max 4 instances for now */
91static struct ali_ircc_cb *dev_self[] = { NULL, NULL, NULL, NULL };
92
93/* Dongle Types */
94static char *dongle_types[] = {
95 "TFDS6000",
96 "HP HSDL-3600",
97 "HP HSDL-1100",
98 "No dongle connected",
99};
100
101/* Some prototypes */
102static int ali_ircc_open(int i, chipio_t *info);
103
104static int ali_ircc_close(struct ali_ircc_cb *self);
105
106static int ali_ircc_setup(chipio_t *info);
107static int ali_ircc_is_receiving(struct ali_ircc_cb *self);
108static int ali_ircc_net_open(struct net_device *dev);
109static int ali_ircc_net_close(struct net_device *dev);
110static int ali_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
1da177e4 111static void ali_ircc_change_speed(struct ali_ircc_cb *self, __u32 baud);
1da177e4
LT		 112static struct net_device_stats *ali_ircc_net_get_stats(struct net_device *dev);
113
114/* SIR function */
115static int ali_ircc_sir_hard_xmit(struct sk_buff *skb, struct net_device *dev);
116static irqreturn_t ali_ircc_sir_interrupt(struct ali_ircc_cb *self);
117static void ali_ircc_sir_receive(struct ali_ircc_cb *self);
118static void ali_ircc_sir_write_wakeup(struct ali_ircc_cb *self);
119static int ali_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len);
120static void ali_ircc_sir_change_speed(struct ali_ircc_cb *priv, __u32 speed);
121
122/* FIR function */
123static int ali_ircc_fir_hard_xmit(struct sk_buff *skb, struct net_device *dev);
124static void ali_ircc_fir_change_speed(struct ali_ircc_cb *priv, __u32 speed);
125static irqreturn_t ali_ircc_fir_interrupt(struct ali_ircc_cb *self);
126static int ali_ircc_dma_receive(struct ali_ircc_cb *self);
127static int ali_ircc_dma_receive_complete(struct ali_ircc_cb *self);
128static int ali_ircc_dma_xmit_complete(struct ali_ircc_cb *self);
129static void ali_ircc_dma_xmit(struct ali_ircc_cb *self);
130
131/* My Function */
132static int ali_ircc_read_dongle_id (int i, chipio_t *info);
133static void ali_ircc_change_dongle_speed(struct ali_ircc_cb *priv, int speed);
134
135/* ALi chip function */
136static void SIR2FIR(int iobase);
137static void FIR2SIR(int iobase);
138static void SetCOMInterrupts(struct ali_ircc_cb *self , unsigned char enable);
139
140/*
141 * Function ali_ircc_init ()
142 *
143 * Initialize chip. Find out whay kinds of chips we are dealing with
144 * and their configuation registers address
145 */
146static int __init ali_ircc_init(void)
147{
148 ali_chip_t *chip;
149 chipio_t info;
9c6c6795 150 int ret;
1da177e4
LT		 151 int cfg, cfg_base;
152 int reg, revision;
153 int i = 0;
154
a97a6f10 155 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
898b1d16
SO		 156
157 ret = platform_driver_register(&ali_ircc_driver);
158 if (ret) {
159 IRDA_ERROR("%s, Can't register driver!\n",
160 ALI_IRCC_DRIVER_NAME);
161 return ret;
162 }
163
9c6c6795 164 ret = -ENODEV;
1da177e4
LT		 165
166 /* Probe for all the ALi chipsets we know about */
167 for (chip= chips; chip->name; chip++, i++)
168 {
a97a6f10 169 IRDA_DEBUG(2, "%s(), Probing for %s ...\n", __func__, chip->name);
1da177e4
LT		 170
171 /* Try all config registers for this chip */
172 for (cfg=0; cfg<2; cfg++)
173 {
174 cfg_base = chip->cfg[cfg];
175 if (!cfg_base)
176 continue;
177
178 memset(&info, 0, sizeof(chipio_t));
179 info.cfg_base = cfg_base;
180 info.fir_base = io[i];
181 info.dma = dma[i];
182 info.irq = irq[i];
183
184
185 /* Enter Configuration */
186 outb(chip->entr1, cfg_base);
187 outb(chip->entr2, cfg_base);
188
189 /* Select Logical Device 5 Registers (UART2) */
190 outb(0x07, cfg_base);
191 outb(0x05, cfg_base+1);
192
193 /* Read Chip Identification Register */
194 outb(chip->cid_index, cfg_base);
195 reg = inb(cfg_base+1);
196
197 if (reg == chip->cid_value)
198 {
a97a6f10 199 IRDA_DEBUG(2, "%s(), Chip found at 0x%03x\n", __func__, cfg_base);
1da177e4
LT		 200
201 outb(0x1F, cfg_base);
202 revision = inb(cfg_base+1);
a97a6f10 203 IRDA_DEBUG(2, "%s(), Found %s chip, revision=%d\n", __func__,
1da177e4
LT		 204 chip->name, revision);
205
206 /*
207 * If the user supplies the base address, then
208 * we init the chip, if not we probe the values
209 * set by the BIOS
210 */
211 if (io[i] < 2000)
212 {
213 chip->init(chip, &info);
214 }
215 else
216 {
217 chip->probe(chip, &info);
218 }
219
220 if (ali_ircc_open(i, &info) == 0)
221 ret = 0;
222 i++;
223 }
224 else
225 {
a97a6f10 226 IRDA_DEBUG(2, "%s(), No %s chip at 0x%03x\n", __func__, chip->name, cfg_base);
1da177e4
LT		 227 }
228 /* Exit configuration */
229 outb(0xbb, cfg_base);
230 }
231 }
232
a97a6f10 233 IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __func__);
898b1d16
SO		 234
235 if (ret)
236 platform_driver_unregister(&ali_ircc_driver);
237
1da177e4
LT		 238 return ret;
239}
240
241/*
242 * Function ali_ircc_cleanup ()
243 *
244 * Close all configured chips
245 *
246 */
247static void __exit ali_ircc_cleanup(void)
248{
249 int i;
250
a97a6f10 251 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
1da177e4 252
9c3bd683 253 for (i=0; i < ARRAY_SIZE(dev_self); i++) {
1da177e4
LT		 254 if (dev_self[i])
255 ali_ircc_close(dev_self[i]);
256 }
257
898b1d16
SO		 258 platform_driver_unregister(&ali_ircc_driver);
259
a97a6f10 260 IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __func__);
1da177e4
LT		 261}
262
263/*
264 * Function ali_ircc_open (int i, chipio_t *inf)
265 *
266 * Open driver instance
267 *
268 */
269static int ali_ircc_open(int i, chipio_t *info)
270{
271 struct net_device *dev;
272 struct ali_ircc_cb *self;
1da177e4
LT		 273 int dongle_id;
274 int err;
275
a97a6f10 276 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
9c3bd683
BH		 277
278 if (i >= ARRAY_SIZE(dev_self)) {
279 IRDA_ERROR("%s(), maximum number of supported chips reached!\n",
a97a6f10 280 __func__);
9c3bd683
BH		 281 return -ENOMEM;
282 }
1da177e4
LT		 283
284 /* Set FIR FIFO and DMA Threshold */
285 if ((ali_ircc_setup(info)) == -1)
286 return -1;
287
288 dev = alloc_irdadev(sizeof(*self));
289 if (dev == NULL) {
290 IRDA_ERROR("%s(), can't allocate memory for control block!\n",
a97a6f10 291 __func__);
1da177e4
LT		 292 return -ENOMEM;
293 }
294
295 self = dev->priv;
296 self->netdev = dev;
297 spin_lock_init(&self->lock);
298
299 /* Need to store self somewhere */
300 dev_self[i] = self;
301 self->index = i;
302
303 /* Initialize IO */
304 self->io.cfg_base = info->cfg_base; /* In ali_ircc_probe_53 assign */
305 self->io.fir_base = info->fir_base; /* info->sir_base = info->fir_base */
306 self->io.sir_base = info->sir_base; /* ALi SIR and FIR use the same address */
307 self->io.irq = info->irq;
308 self->io.fir_ext = CHIP_IO_EXTENT;
309 self->io.dma = info->dma;
310 self->io.fifo_size = 16; /* SIR: 16, FIR: 32 Benjamin 2000/11/1 */
311
312 /* Reserve the ioports that we need */
898b1d16
SO		 313 if (!request_region(self->io.fir_base, self->io.fir_ext,
314 ALI_IRCC_DRIVER_NAME)) {
a97a6f10 315 IRDA_WARNING("%s(), can't get iobase of 0x%03x\n", __func__,
1da177e4
LT		 316 self->io.fir_base);
317 err = -ENODEV;
318 goto err_out1;
319 }
320
321 /* Initialize QoS for this device */
322 irda_init_max_qos_capabilies(&self->qos);
323
324 /* The only value we must override it the baudrate */
325 self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
326 IR_115200|IR_576000|IR_1152000|(IR_4000000 << 8); // benjamin 2000/11/8 05:27PM
327
328 self->qos.min_turn_time.bits = qos_mtt_bits;
329
330 irda_qos_bits_to_value(&self->qos);
331
332 /* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
333 self->rx_buff.truesize = 14384;
334 self->tx_buff.truesize = 14384;
335
336 /* Allocate memory if needed */
337 self->rx_buff.head =
338 dma_alloc_coherent(NULL, self->rx_buff.truesize,
339 &self->rx_buff_dma, GFP_KERNEL);
340 if (self->rx_buff.head == NULL) {
341 err = -ENOMEM;
342 goto err_out2;
343 }
344 memset(self->rx_buff.head, 0, self->rx_buff.truesize);
345
346 self->tx_buff.head =
347 dma_alloc_coherent(NULL, self->tx_buff.truesize,
348 &self->tx_buff_dma, GFP_KERNEL);
349 if (self->tx_buff.head == NULL) {
350 err = -ENOMEM;
351 goto err_out3;
352 }
353 memset(self->tx_buff.head, 0, self->tx_buff.truesize);
354
355 self->rx_buff.in_frame = FALSE;
356 self->rx_buff.state = OUTSIDE_FRAME;
357 self->tx_buff.data = self->tx_buff.head;
358 self->rx_buff.data = self->rx_buff.head;
359
360 /* Reset Tx queue info */
361 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
362 self->tx_fifo.tail = self->tx_buff.head;
363
1da177e4
LT		 364 /* Override the network functions we need to use */
365 dev->hard_start_xmit = ali_ircc_sir_hard_xmit;
366 dev->open = ali_ircc_net_open;
367 dev->stop = ali_ircc_net_close;
368 dev->do_ioctl = ali_ircc_net_ioctl;
369 dev->get_stats = ali_ircc_net_get_stats;
370
371 err = register_netdev(dev);
372 if (err) {
a97a6f10 373 IRDA_ERROR("%s(), register_netdev() failed!\n", __func__);
1da177e4
LT		 374 goto err_out4;
375 }
376 IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);
377
378 /* Check dongle id */
379 dongle_id = ali_ircc_read_dongle_id(i, info);
a97a6f10 380 IRDA_MESSAGE("%s(), %s, Found dongle: %s\n", __func__,
898b1d16 381 ALI_IRCC_DRIVER_NAME, dongle_types[dongle_id]);
1da177e4
LT		 382
383 self->io.dongle_id = dongle_id;
1da177e4 384
a97a6f10 385 IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __func__);
1da177e4
LT		 386
387 return 0;
388
389 err_out4:
390 dma_free_coherent(NULL, self->tx_buff.truesize,
391 self->tx_buff.head, self->tx_buff_dma);
392 err_out3:
393 dma_free_coherent(NULL, self->rx_buff.truesize,
394 self->rx_buff.head, self->rx_buff_dma);
395 err_out2:
396 release_region(self->io.fir_base, self->io.fir_ext);
397 err_out1:
398 dev_self[i] = NULL;
399 free_netdev(dev);
400 return err;
401}
402
403
404/*
405 * Function ali_ircc_close (self)
406 *
407 * Close driver instance
408 *
409 */
410static int __exit ali_ircc_close(struct ali_ircc_cb *self)
411{
412 int iobase;
413
a97a6f10 414 IRDA_DEBUG(4, "%s(), ---------------- Start ----------------\n", __func__);
1da177e4
LT		 415
416 IRDA_ASSERT(self != NULL, return -1;);
417
418 iobase = self->io.fir_base;
419
420 /* Remove netdevice */
421 unregister_netdev(self->netdev);
422
423 /* Release the PORT that this driver is using */
a97a6f10 424 IRDA_DEBUG(4, "%s(), Releasing Region %03x\n", __func__, self->io.fir_base);
1da177e4
LT		 425 release_region(self->io.fir_base, self->io.fir_ext);
426
427 if (self->tx_buff.head)
428 dma_free_coherent(NULL, self->tx_buff.truesize,
429 self->tx_buff.head, self->tx_buff_dma);
430
431 if (self->rx_buff.head)
432 dma_free_coherent(NULL, self->rx_buff.truesize,
433 self->rx_buff.head, self->rx_buff_dma);
434
435 dev_self[self->index] = NULL;
436 free_netdev(self->netdev);
437
a97a6f10 438 IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __func__);
1da177e4
LT		 439
440 return 0;
441}
442
443/*
444 * Function ali_ircc_init_43 (chip, info)
445 *
446 * Initialize the ALi M1543 chip.
447 */
448static int ali_ircc_init_43(ali_chip_t *chip, chipio_t *info)
449{
450 /* All controller information like I/O address, DMA channel, IRQ
451 * are set by BIOS
452 */
453
454 return 0;
455}
456
457/*
458 * Function ali_ircc_init_53 (chip, info)
459 *
460 * Initialize the ALi M1535 chip.
461 */
462static int ali_ircc_init_53(ali_chip_t *chip, chipio_t *info)
463{
464 /* All controller information like I/O address, DMA channel, IRQ
465 * are set by BIOS
466 */
467
468 return 0;
469}
470
471/*
472 * Function ali_ircc_probe_53 (chip, info)
473 *
474 * Probes for the ALi M1535D or M1535
475 */
476static int ali_ircc_probe_53(ali_chip_t *chip, chipio_t *info)
477{
478 int cfg_base = info->cfg_base;
479 int hi, low, reg;
480
a97a6f10 481 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
1da177e4
LT		 482
483 /* Enter Configuration */
484 outb(chip->entr1, cfg_base);
485 outb(chip->entr2, cfg_base);
486
487 /* Select Logical Device 5 Registers (UART2) */
488 outb(0x07, cfg_base);
489 outb(0x05, cfg_base+1);
490
491 /* Read address control register */
492 outb(0x60, cfg_base);
493 hi = inb(cfg_base+1);
494 outb(0x61, cfg_base);
495 low = inb(cfg_base+1);
496 info->fir_base = (hi<<8) + low;
497
498 info->sir_base = info->fir_base;
499
a97a6f10 500 IRDA_DEBUG(2, "%s(), probing fir_base=0x%03x\n", __func__, info->fir_base);
1da177e4
LT		 501
502 /* Read IRQ control register */
503 outb(0x70, cfg_base);
504 reg = inb(cfg_base+1);
505 info->irq = reg & 0x0f;
a97a6f10 506 IRDA_DEBUG(2, "%s(), probing irq=%d\n", __func__, info->irq);
1da177e4
LT		 507
508 /* Read DMA channel */
509 outb(0x74, cfg_base);
510 reg = inb(cfg_base+1);
511 info->dma = reg & 0x07;
512
513 if(info->dma == 0x04)
a97a6f10 514 IRDA_WARNING("%s(), No DMA channel assigned !\n", __func__);
1da177e4 515 else
a97a6f10 516 IRDA_DEBUG(2, "%s(), probing dma=%d\n", __func__, info->dma);
1da177e4
LT		 517
518 /* Read Enabled Status */
519 outb(0x30, cfg_base);
520 reg = inb(cfg_base+1);
521 info->enabled = (reg & 0x80) && (reg & 0x01);
a97a6f10 522 IRDA_DEBUG(2, "%s(), probing enabled=%d\n", __func__, info->enabled);
1da177e4
LT		 523
524 /* Read Power Status */
525 outb(0x22, cfg_base);
526 reg = inb(cfg_base+1);
527 info->suspended = (reg & 0x20);
a97a6f10 528 IRDA_DEBUG(2, "%s(), probing suspended=%d\n", __func__, info->suspended);
1da177e4
LT		 529
530 /* Exit configuration */
531 outb(0xbb, cfg_base);
532
a97a6f10 533 IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __func__);
1da177e4
LT		 534
535 return 0;
536}
537
538/*
539 * Function ali_ircc_setup (info)
540 *
541 * Set FIR FIFO and DMA Threshold
542 * Returns non-negative on success.
543 *
544 */
545static int ali_ircc_setup(chipio_t *info)
546{
547 unsigned char tmp;
548 int version;
549 int iobase = info->fir_base;
550
a97a6f10 551 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
1da177e4
LT		 552
553 /* Locking comments :
554 * Most operations here need to be protected. We are called before
555 * the device instance is created in ali_ircc_open(), therefore
556 * nobody can bother us - Jean II */
557
558 /* Switch to FIR space */
559 SIR2FIR(iobase);
560
561 /* Master Reset */
562 outb(0x40, iobase+FIR_MCR); // benjamin 2000/11/30 11:45AM
563
564 /* Read FIR ID Version Register */
565 switch_bank(iobase, BANK3);
566 version = inb(iobase+FIR_ID_VR);
567
568 /* Should be 0x00 in the M1535/M1535D */
569 if(version != 0x00)
570 {
898b1d16
SO		 571 IRDA_ERROR("%s, Wrong chip version %02x\n",
572 ALI_IRCC_DRIVER_NAME, version);
1da177e4
LT		 573 return -1;
574 }
575
1da177e4
LT		 576 /* Set FIR FIFO Threshold Register */
577 switch_bank(iobase, BANK1);
578 outb(RX_FIFO_Threshold, iobase+FIR_FIFO_TR);
579
580 /* Set FIR DMA Threshold Register */
581 outb(RX_DMA_Threshold, iobase+FIR_DMA_TR);
582
583 /* CRC enable */
584 switch_bank(iobase, BANK2);
585 outb(inb(iobase+FIR_IRDA_CR) | IRDA_CR_CRC, iobase+FIR_IRDA_CR);
586
587 /* NDIS driver set TX Length here BANK2 Alias 3, Alias4*/
588
589 /* Switch to Bank 0 */
590 switch_bank(iobase, BANK0);
591
592 tmp = inb(iobase+FIR_LCR_B);
593 tmp &=~0x20; // disable SIP
594 tmp |= 0x80; // these two steps make RX mode
595 tmp &= 0xbf;
596 outb(tmp, iobase+FIR_LCR_B);
597
598 /* Disable Interrupt */
599 outb(0x00, iobase+FIR_IER);
600
601
602 /* Switch to SIR space */
603 FIR2SIR(iobase);
604
898b1d16
SO		 605 IRDA_MESSAGE("%s, driver loaded (Benjamin Kong)\n",
606 ALI_IRCC_DRIVER_NAME);
1da177e4
LT		 607
608 /* Enable receive interrupts */
609 // outb(UART_IER_RDI, iobase+UART_IER); //benjamin 2000/11/23 01:25PM
610 // Turn on the interrupts in ali_ircc_net_open
611
a97a6f10 612 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__);
1da177e4
LT		 613
614 return 0;
615}
616
617/*
618 * Function ali_ircc_read_dongle_id (int index, info)
619 *
620 * Try to read dongle indentification. This procedure needs to be executed
621 * once after power-on/reset. It also needs to be used whenever you suspect
622 * that the user may have plugged/unplugged the IrDA Dongle.
623 */
624static int ali_ircc_read_dongle_id (int i, chipio_t *info)
625{
626 int dongle_id, reg;
627 int cfg_base = info->cfg_base;
628
a97a6f10 629 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
1da177e4
LT		 630
631 /* Enter Configuration */
632 outb(chips[i].entr1, cfg_base);
633 outb(chips[i].entr2, cfg_base);
634
635 /* Select Logical Device 5 Registers (UART2) */
636 outb(0x07, cfg_base);
637 outb(0x05, cfg_base+1);
638
639 /* Read Dongle ID */
640 outb(0xf0, cfg_base);
641 reg = inb(cfg_base+1);
642 dongle_id = ((reg>>6)&0x02) | ((reg>>5)&0x01);
a97a6f10 643 IRDA_DEBUG(2, "%s(), probing dongle_id=%d, dongle_types=%s\n", __func__,
1da177e4
LT		 644 dongle_id, dongle_types[dongle_id]);
645
646 /* Exit configuration */
647 outb(0xbb, cfg_base);
648
a97a6f10 649 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__);
1da177e4
LT		 650
651 return dongle_id;
652}
653
654/*
655 * Function ali_ircc_interrupt (irq, dev_id, regs)
656 *
657 * An interrupt from the chip has arrived. Time to do some work
658 *
659 */
7d12e780 660static irqreturn_t ali_ircc_interrupt(int irq, void *dev_id)
1da177e4 661{
c31f28e7 662 struct net_device *dev = dev_id;
1da177e4
LT		 663 struct ali_ircc_cb *self;
664 int ret;
665
a97a6f10 666 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
1da177e4 667
c31f28e7 668 self = dev->priv;
1da177e4
LT		 669
670 spin_lock(&self->lock);
671
672 /* Dispatch interrupt handler for the current speed */
673 if (self->io.speed > 115200)
674 ret = ali_ircc_fir_interrupt(self);
675 else
676 ret = ali_ircc_sir_interrupt(self);
677
678 spin_unlock(&self->lock);
679
a97a6f10 680 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__);
1da177e4
LT		 681 return ret;
682}
683/*
684 * Function ali_ircc_fir_interrupt(irq, struct ali_ircc_cb *self)
685 *
686 * Handle MIR/FIR interrupt
687 *
688 */
689static irqreturn_t ali_ircc_fir_interrupt(struct ali_ircc_cb *self)
690{
691 __u8 eir, OldMessageCount;
692 int iobase, tmp;
693
a97a6f10 694 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__);
1da177e4
LT		 695
696 iobase = self->io.fir_base;
697
698 switch_bank(iobase, BANK0);
699 self->InterruptID = inb(iobase+FIR_IIR);
700 self->BusStatus = inb(iobase+FIR_BSR);
701
702 OldMessageCount = (self->LineStatus + 1) & 0x07;
703 self->LineStatus = inb(iobase+FIR_LSR);
704 //self->ier = inb(iobase+FIR_IER); 2000/12/1 04:32PM
705 eir = self->InterruptID & self->ier; /* Mask out the interesting ones */
706
a97a6f10
HH		 707 IRDA_DEBUG(1, "%s(), self->InterruptID = %x\n", __func__,self->InterruptID);
708 IRDA_DEBUG(1, "%s(), self->LineStatus = %x\n", __func__,self->LineStatus);
709 IRDA_DEBUG(1, "%s(), self->ier = %x\n", __func__,self->ier);
710 IRDA_DEBUG(1, "%s(), eir = %x\n", __func__,eir);
1da177e4
LT		 711
712 /* Disable interrupts */
713 SetCOMInterrupts(self, FALSE);
714
715 /* Tx or Rx Interrupt */
716
717 if (eir & IIR_EOM)
718 {
719 if (self->io.direction == IO_XMIT) /* TX */
720 {
a97a6f10 721 IRDA_DEBUG(1, "%s(), ******* IIR_EOM (Tx) *******\n", __func__);
1da177e4
LT		 722
723 if(ali_ircc_dma_xmit_complete(self))
724 {
725 if (irda_device_txqueue_empty(self->netdev))
726 {
727 /* Prepare for receive */
728 ali_ircc_dma_receive(self);
729 self->ier = IER_EOM;
730 }
731 }
732 else
733 {
734 self->ier = IER_EOM;
735 }
736
737 }
738 else /* RX */
739 {
a97a6f10 740 IRDA_DEBUG(1, "%s(), ******* IIR_EOM (Rx) *******\n", __func__);
1da177e4
LT		 741
742 if(OldMessageCount > ((self->LineStatus+1) & 0x07))
743 {
744 self->rcvFramesOverflow = TRUE;
a97a6f10 745 IRDA_DEBUG(1, "%s(), ******* self->rcvFramesOverflow = TRUE ******** \n", __func__);
1da177e4
LT		 746 }
747
748 if (ali_ircc_dma_receive_complete(self))
749 {
a97a6f10 750 IRDA_DEBUG(1, "%s(), ******* receive complete ******** \n", __func__);
1da177e4
LT		 751
752 self->ier = IER_EOM;
753 }
754 else
755 {
a97a6f10 756 IRDA_DEBUG(1, "%s(), ******* Not receive complete ******** \n", __func__);
1da177e4
LT		 757
758 self->ier = IER_EOM | IER_TIMER;
759 }
760
761 }
762 }
763 /* Timer Interrupt */
764 else if (eir & IIR_TIMER)
765 {
766 if(OldMessageCount > ((self->LineStatus+1) & 0x07))
767 {
768 self->rcvFramesOverflow = TRUE;
a97a6f10 769 IRDA_DEBUG(1, "%s(), ******* self->rcvFramesOverflow = TRUE ******* \n", __func__);
1da177e4
LT		 770 }
771 /* Disable Timer */
772 switch_bank(iobase, BANK1);
773 tmp = inb(iobase+FIR_CR);
774 outb( tmp& ~CR_TIMER_EN, iobase+FIR_CR);
775
776 /* Check if this is a Tx timer interrupt */
777 if (self->io.direction == IO_XMIT)
778 {
779 ali_ircc_dma_xmit(self);
780
781 /* Interrupt on EOM */
782 self->ier = IER_EOM;
783
784 }
785 else /* Rx */
786 {
787 if(ali_ircc_dma_receive_complete(self))
788 {
789 self->ier = IER_EOM;
790 }
791 else
792 {
793 self->ier = IER_EOM | IER_TIMER;
794 }
795 }
796 }
797
798 /* Restore Interrupt */
799 SetCOMInterrupts(self, TRUE);
800
a97a6f10 801 IRDA_DEBUG(1, "%s(), ----------------- End ---------------\n", __func__);
1da177e4
LT		 802 return IRQ_RETVAL(eir);
803}
804
805/*
806 * Function ali_ircc_sir_interrupt (irq, self, eir)
807 *
808 * Handle SIR interrupt
809 *
810 */
811static irqreturn_t ali_ircc_sir_interrupt(struct ali_ircc_cb *self)
812{
813 int iobase;
814 int iir, lsr;
815
a97a6f10 816 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
1da177e4
LT		 817
818 iobase = self->io.sir_base;
819
820 iir = inb(iobase+UART_IIR) & UART_IIR_ID;
821 if (iir) {
822 /* Clear interrupt */
823 lsr = inb(iobase+UART_LSR);
824
a97a6f10 825 IRDA_DEBUG(4, "%s(), iir=%02x, lsr=%02x, iobase=%#x\n", __func__,
1da177e4
LT		 826 iir, lsr, iobase);
827
828 switch (iir)
829 {
830 case UART_IIR_RLSI:
a97a6f10 831 IRDA_DEBUG(2, "%s(), RLSI\n", __func__);
1da177e4
LT		 832 break;
833 case UART_IIR_RDI:
834 /* Receive interrupt */
835 ali_ircc_sir_receive(self);
836 break;
837 case UART_IIR_THRI:
838 if (lsr & UART_LSR_THRE)
839 {
840 /* Transmitter ready for data */
841 ali_ircc_sir_write_wakeup(self);
842 }
843 break;
844 default:
a97a6f10 845 IRDA_DEBUG(0, "%s(), unhandled IIR=%#x\n", __func__, iir);
1da177e4
LT		 846 break;
847 }
848
849 }
850
851
a97a6f10 852 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__);
1da177e4
LT		 853
854 return IRQ_RETVAL(iir);
855}
856
857
858/*
859 * Function ali_ircc_sir_receive (self)
860 *
861 * Receive one frame from the infrared port
862 *
863 */
864static void ali_ircc_sir_receive(struct ali_ircc_cb *self)
865{
866 int boguscount = 0;
867 int iobase;
868
a97a6f10 869 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
1da177e4
LT		 870 IRDA_ASSERT(self != NULL, return;);
871
872 iobase = self->io.sir_base;
873
874 /*
875 * Receive all characters in Rx FIFO, unwrap and unstuff them.
876 * async_unwrap_char will deliver all found frames
877 */
878 do {
879 async_unwrap_char(self->netdev, &self->stats, &self->rx_buff,
880 inb(iobase+UART_RX));
881
882 /* Make sure we don't stay here too long */
883 if (boguscount++ > 32) {
a97a6f10 884 IRDA_DEBUG(2,"%s(), breaking!\n", __func__);
1da177e4
LT		 885 break;
886 }
887 } while (inb(iobase+UART_LSR) & UART_LSR_DR);
888
a97a6f10 889 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
1da177e4
LT		 890}
891
892/*
893 * Function ali_ircc_sir_write_wakeup (tty)
894 *
895 * Called by the driver when there's room for more data. If we have
896 * more packets to send, we send them here.
897 *
898 */
899static void ali_ircc_sir_write_wakeup(struct ali_ircc_cb *self)
900{
901 int actual = 0;
902 int iobase;
903
904 IRDA_ASSERT(self != NULL, return;);
905
a97a6f10 906 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__ );
1da177e4
LT		 907
908 iobase = self->io.sir_base;
909
910 /* Finished with frame? */
911 if (self->tx_buff.len > 0)
912 {
913 /* Write data left in transmit buffer */
914 actual = ali_ircc_sir_write(iobase, self->io.fifo_size,
915 self->tx_buff.data, self->tx_buff.len);
916 self->tx_buff.data += actual;
917 self->tx_buff.len -= actual;
918 }
919 else
920 {
921 if (self->new_speed)
922 {
923 /* We must wait until all data are gone */
924 while(!(inb(iobase+UART_LSR) & UART_LSR_TEMT))
a97a6f10 925 IRDA_DEBUG(1, "%s(), UART_LSR_THRE\n", __func__ );
1da177e4 926
a97a6f10 927 IRDA_DEBUG(1, "%s(), Changing speed! self->new_speed = %d\n", __func__ , self->new_speed);
1da177e4
LT		 928 ali_ircc_change_speed(self, self->new_speed);
929 self->new_speed = 0;
930
931 // benjamin 2000/11/10 06:32PM
932 if (self->io.speed > 115200)
933 {
a97a6f10 934 IRDA_DEBUG(2, "%s(), ali_ircc_change_speed from UART_LSR_TEMT \n", __func__ );
1da177e4
LT		 935
936 self->ier = IER_EOM;
937 // SetCOMInterrupts(self, TRUE);
938 return;
939 }
940 }
941 else
942 {
943 netif_wake_queue(self->netdev);
944 }
945
946 self->stats.tx_packets++;
947
948 /* Turn on receive interrupts */
949 outb(UART_IER_RDI, iobase+UART_IER);
950 }
951
a97a6f10 952 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
1da177e4
LT		 953}
954
955static void ali_ircc_change_speed(struct ali_ircc_cb *self, __u32 baud)
956{
957 struct net_device *dev = self->netdev;
958 int iobase;
959
a97a6f10 960 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__ );
1da177e4 961
a97a6f10 962 IRDA_DEBUG(2, "%s(), setting speed = %d \n", __func__ , baud);
1da177e4
LT		 963
964 /* This function *must* be called with irq off and spin-lock.
965 * - Jean II */
966
967 iobase = self->io.fir_base;
968
969 SetCOMInterrupts(self, FALSE); // 2000/11/24 11:43AM
970
971 /* Go to MIR, FIR Speed */
972 if (baud > 115200)
973 {
974
975
976 ali_ircc_fir_change_speed(self, baud);
977
978 /* Install FIR xmit handler*/
979 dev->hard_start_xmit = ali_ircc_fir_hard_xmit;
980
981 /* Enable Interuupt */
982 self->ier = IER_EOM; // benjamin 2000/11/20 07:24PM
983
984 /* Be ready for incomming frames */
985 ali_ircc_dma_receive(self); // benajmin 2000/11/8 07:46PM not complete
986 }
987 /* Go to SIR Speed */
988 else
989 {
990 ali_ircc_sir_change_speed(self, baud);
991
992 /* Install SIR xmit handler*/
993 dev->hard_start_xmit = ali_ircc_sir_hard_xmit;
994 }
995
996
997 SetCOMInterrupts(self, TRUE); // 2000/11/24 11:43AM
998
999 netif_wake_queue(self->netdev);
1000
a97a6f10 1001 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
1da177e4
LT		 1002}
1003
1004static void ali_ircc_fir_change_speed(struct ali_ircc_cb *priv, __u32 baud)
1005{
1006
1007 int iobase;
1008 struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
1009 struct net_device *dev;
1010
a97a6f10 1011 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__ );
1da177e4
LT		 1012
1013 IRDA_ASSERT(self != NULL, return;);
1014
1015 dev = self->netdev;
1016 iobase = self->io.fir_base;
1017
a97a6f10 1018 IRDA_DEBUG(1, "%s(), self->io.speed = %d, change to speed = %d\n", __func__ ,self->io.speed,baud);
1da177e4
LT		 1019
1020 /* Come from SIR speed */
1021 if(self->io.speed <=115200)
1022 {
1023 SIR2FIR(iobase);
1024 }
1025
1026 /* Update accounting for new speed */
1027 self->io.speed = baud;
1028
1029 // Set Dongle Speed mode
1030 ali_ircc_change_dongle_speed(self, baud);
1031
a97a6f10 1032 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1da177e4
LT		 1033}
1034
1035/*
1036 * Function ali_sir_change_speed (self, speed)
1037 *
1038 * Set speed of IrDA port to specified baudrate
1039 *
1040 */
1041static void ali_ircc_sir_change_speed(struct ali_ircc_cb *priv, __u32 speed)
1042{
1043 struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
1044 unsigned long flags;
1045 int iobase;
1046 int fcr; /* FIFO control reg */
1047 int lcr; /* Line control reg */
1048 int divisor;
1049
a97a6f10 1050 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__ );
1da177e4 1051
a97a6f10 1052 IRDA_DEBUG(1, "%s(), Setting speed to: %d\n", __func__ , speed);
1da177e4
LT		 1053
1054 IRDA_ASSERT(self != NULL, return;);
1055
1056 iobase = self->io.sir_base;
1057
1058 /* Come from MIR or FIR speed */
1059 if(self->io.speed >115200)
1060 {
1061 // Set Dongle Speed mode first
1062 ali_ircc_change_dongle_speed(self, speed);
1063
1064 FIR2SIR(iobase);
1065 }
1066
1067 // Clear Line and Auxiluary status registers 2000/11/24 11:47AM
1068
1069 inb(iobase+UART_LSR);
1070 inb(iobase+UART_SCR);
1071
1072 /* Update accounting for new speed */
1073 self->io.speed = speed;
1074
1075 spin_lock_irqsave(&self->lock, flags);
1076
1077 divisor = 115200/speed;
1078
1079 fcr = UART_FCR_ENABLE_FIFO;
1080
1081 /*
1082 * Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and
1083 * almost 1,7 ms at 19200 bps. At speeds above that we can just forget
1084 * about this timeout since it will always be fast enough.
1085 */
1086 if (self->io.speed < 38400)
1087 fcr |= UART_FCR_TRIGGER_1;
1088 else
1089 fcr |= UART_FCR_TRIGGER_14;
1090
1091 /* IrDA ports use 8N1 */
1092 lcr = UART_LCR_WLEN8;
1093
1094 outb(UART_LCR_DLAB | lcr, iobase+UART_LCR); /* Set DLAB */
1095 outb(divisor & 0xff, iobase+UART_DLL); /* Set speed */
1096 outb(divisor >> 8, iobase+UART_DLM);
1097 outb(lcr, iobase+UART_LCR); /* Set 8N1 */
1098 outb(fcr, iobase+UART_FCR); /* Enable FIFO's */
1099
1100 /* without this, the conection will be broken after come back from FIR speed,
1101 but with this, the SIR connection is harder to established */
1102 outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase+UART_MCR);
1103
1104 spin_unlock_irqrestore(&self->lock, flags);
1105
a97a6f10 1106 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1da177e4
LT		 1107}
1108
1109static void ali_ircc_change_dongle_speed(struct ali_ircc_cb *priv, int speed)
1110{
1111
1112 struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
1113 int iobase,dongle_id;
1114 int tmp = 0;
1115
a97a6f10 1116 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__ );
1da177e4
LT		 1117
1118 iobase = self->io.fir_base; /* or iobase = self->io.sir_base; */
1119 dongle_id = self->io.dongle_id;
1120
1121 /* We are already locked, no need to do it again */
1122
a97a6f10 1123 IRDA_DEBUG(1, "%s(), Set Speed for %s , Speed = %d\n", __func__ , dongle_types[dongle_id], speed);
1da177e4
LT		 1124
1125 switch_bank(iobase, BANK2);
1126 tmp = inb(iobase+FIR_IRDA_CR);
1127
1128 /* IBM type dongle */
1129 if(dongle_id == 0)
1130 {
1131 if(speed == 4000000)
1132 {
1133 // __ __
1134 // SD/MODE __| |__ __
1135 // __ __
1136 // IRTX __ __| |__
1137 // T1 T2 T3 T4 T5
1138
1139 tmp &= ~IRDA_CR_HDLC; // HDLC=0
1140 tmp |= IRDA_CR_CRC; // CRC=1
1141
1142 switch_bank(iobase, BANK2);
1143 outb(tmp, iobase+FIR_IRDA_CR);
1144
1145 // T1 -> SD/MODE:0 IRTX:0
1146 tmp &= ~0x09;
1147 tmp |= 0x02;
1148 outb(tmp, iobase+FIR_IRDA_CR);
1149 udelay(2);
1150
1151 // T2 -> SD/MODE:1 IRTX:0
1152 tmp &= ~0x01;
1153 tmp |= 0x0a;
1154 outb(tmp, iobase+FIR_IRDA_CR);
1155 udelay(2);
1156
1157 // T3 -> SD/MODE:1 IRTX:1
1158 tmp |= 0x0b;
1159 outb(tmp, iobase+FIR_IRDA_CR);
1160 udelay(2);
1161
1162 // T4 -> SD/MODE:0 IRTX:1
1163 tmp &= ~0x08;
1164 tmp |= 0x03;
1165 outb(tmp, iobase+FIR_IRDA_CR);
1166 udelay(2);
1167
1168 // T5 -> SD/MODE:0 IRTX:0
1169 tmp &= ~0x09;
1170 tmp |= 0x02;
1171 outb(tmp, iobase+FIR_IRDA_CR);
1172 udelay(2);
1173
1174 // reset -> Normal TX output Signal
1175 outb(tmp & ~0x02, iobase+FIR_IRDA_CR);
1176 }
1177 else /* speed <=1152000 */
1178 {
1179 // __
1180 // SD/MODE __| |__
1181 //
1182 // IRTX ________
1183 // T1 T2 T3
1184
1185 /* MIR 115200, 57600 */
1186 if (speed==1152000)
1187 {
1188 tmp |= 0xA0; //HDLC=1, 1.152Mbps=1
1189 }
1190 else
1191 {
1192 tmp &=~0x80; //HDLC 0.576Mbps
1193 tmp |= 0x20; //HDLC=1,
1194 }
1195
1196 tmp |= IRDA_CR_CRC; // CRC=1
1197
1198 switch_bank(iobase, BANK2);
1199 outb(tmp, iobase+FIR_IRDA_CR);
1200
1201 /* MIR 115200, 57600 */
1202
1203 //switch_bank(iobase, BANK2);
1204 // T1 -> SD/MODE:0 IRTX:0
1205 tmp &= ~0x09;
1206 tmp |= 0x02;
1207 outb(tmp, iobase+FIR_IRDA_CR);
1208 udelay(2);
1209
1210 // T2 -> SD/MODE:1 IRTX:0
1211 tmp &= ~0x01;
1212 tmp |= 0x0a;
1213 outb(tmp, iobase+FIR_IRDA_CR);
1214
1215 // T3 -> SD/MODE:0 IRTX:0
1216 tmp &= ~0x09;
1217 tmp |= 0x02;
1218 outb(tmp, iobase+FIR_IRDA_CR);
1219 udelay(2);
1220
1221 // reset -> Normal TX output Signal
1222 outb(tmp & ~0x02, iobase+FIR_IRDA_CR);
1223 }
1224 }
1225 else if (dongle_id == 1) /* HP HDSL-3600 */
1226 {
1227 switch(speed)
1228 {
1229 case 4000000:
1230 tmp &= ~IRDA_CR_HDLC; // HDLC=0
1231 break;
1232
1233 case 1152000:
1234 tmp |= 0xA0; // HDLC=1, 1.152Mbps=1
1235 break;
1236
1237 case 576000:
1238 tmp &=~0x80; // HDLC 0.576Mbps
1239 tmp |= 0x20; // HDLC=1,
1240 break;
1241 }
1242
1243 tmp |= IRDA_CR_CRC; // CRC=1
1244
1245 switch_bank(iobase, BANK2);
1246 outb(tmp, iobase+FIR_IRDA_CR);
1247 }
1248 else /* HP HDSL-1100 */
1249 {
1250 if(speed <= 115200) /* SIR */
1251 {
1252
1253 tmp &= ~IRDA_CR_FIR_SIN; // HP sin select = 0
1254
1255 switch_bank(iobase, BANK2);
1256 outb(tmp, iobase+FIR_IRDA_CR);
1257 }
1258 else /* MIR FIR */
1259 {
1260
1261 switch(speed)
1262 {
1263 case 4000000:
1264 tmp &= ~IRDA_CR_HDLC; // HDLC=0
1265 break;
1266
1267 case 1152000:
1268 tmp |= 0xA0; // HDLC=1, 1.152Mbps=1
1269 break;
1270
1271 case 576000:
1272 tmp &=~0x80; // HDLC 0.576Mbps
1273 tmp |= 0x20; // HDLC=1,
1274 break;
1275 }
1276
1277 tmp |= IRDA_CR_CRC; // CRC=1
1278 tmp |= IRDA_CR_FIR_SIN; // HP sin select = 1
1279
1280 switch_bank(iobase, BANK2);
1281 outb(tmp, iobase+FIR_IRDA_CR);
1282 }
1283 }
1284
1285 switch_bank(iobase, BANK0);
1286
a97a6f10 1287 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1da177e4
LT		 1288}
1289
1290/*
1291 * Function ali_ircc_sir_write (driver)
1292 *
1293 * Fill Tx FIFO with transmit data
1294 *
1295 */
1296static int ali_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len)
1297{
1298 int actual = 0;
1299
a97a6f10 1300 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__ );
1da177e4
LT		 1301
1302 /* Tx FIFO should be empty! */
1303 if (!(inb(iobase+UART_LSR) & UART_LSR_THRE)) {
a97a6f10 1304 IRDA_DEBUG(0, "%s(), failed, fifo not empty!\n", __func__ );
1da177e4
LT		 1305 return 0;
1306 }
1307
1308 /* Fill FIFO with current frame */
1309 while ((fifo_size-- > 0) && (actual < len)) {
1310 /* Transmit next byte */
1311 outb(buf[actual], iobase+UART_TX);
1312
1313 actual++;
1314 }
1315
a97a6f10 1316 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
1da177e4
LT		 1317 return actual;
1318}
1319
1320/*
1321 * Function ali_ircc_net_open (dev)
1322 *
1323 * Start the device
1324 *
1325 */
1326static int ali_ircc_net_open(struct net_device *dev)
1327{
1328 struct ali_ircc_cb *self;
1329 int iobase;
1330 char hwname[32];
1331
a97a6f10 1332 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__ );
1da177e4
LT		 1333
1334 IRDA_ASSERT(dev != NULL, return -1;);
1335
1336 self = (struct ali_ircc_cb *) dev->priv;
1337
1338 IRDA_ASSERT(self != NULL, return 0;);
1339
1340 iobase = self->io.fir_base;
1341
1342 /* Request IRQ and install Interrupt Handler */
1343 if (request_irq(self->io.irq, ali_ircc_interrupt, 0, dev->name, dev))
1344 {
898b1d16
SO		 1345 IRDA_WARNING("%s, unable to allocate irq=%d\n",
1346 ALI_IRCC_DRIVER_NAME,
1da177e4
LT		 1347 self->io.irq);
1348 return -EAGAIN;
1349 }
1350
1351 /*
1352 * Always allocate the DMA channel after the IRQ, and clean up on
1353 * failure.
1354 */
1355 if (request_dma(self->io.dma, dev->name)) {
898b1d16
SO		 1356 IRDA_WARNING("%s, unable to allocate dma=%d\n",
1357 ALI_IRCC_DRIVER_NAME,
1da177e4
LT		 1358 self->io.dma);
1359 free_irq(self->io.irq, self);
1360 return -EAGAIN;
1361 }
1362
1363 /* Turn on interrups */
1364 outb(UART_IER_RDI , iobase+UART_IER);
1365
1366 /* Ready to play! */
1367 netif_start_queue(dev); //benjamin by irport
1368
1369 /* Give self a hardware name */
1370 sprintf(hwname, "ALI-FIR @ 0x%03x", self->io.fir_base);
1371
1372 /*
1373 * Open new IrLAP layer instance, now that everything should be
1374 * initialized properly
1375 */
1376 self->irlap = irlap_open(dev, &self->qos, hwname);
1377
a97a6f10 1378 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
1da177e4
LT		 1379
1380 return 0;
1381}
1382
1383/*
1384 * Function ali_ircc_net_close (dev)
1385 *
1386 * Stop the device
1387 *
1388 */
1389static int ali_ircc_net_close(struct net_device *dev)
1390{
1391
1392 struct ali_ircc_cb *self;
1393 //int iobase;
1394
a97a6f10 1395 IRDA_DEBUG(4, "%s(), ---------------- Start ----------------\n", __func__ );
1da177e4
LT		 1396
1397 IRDA_ASSERT(dev != NULL, return -1;);
1398
1399 self = (struct ali_ircc_cb *) dev->priv;
1400 IRDA_ASSERT(self != NULL, return 0;);
1401
1402 /* Stop device */
1403 netif_stop_queue(dev);
1404
1405 /* Stop and remove instance of IrLAP */
1406 if (self->irlap)
1407 irlap_close(self->irlap);
1408 self->irlap = NULL;
1409
1410 disable_dma(self->io.dma);
1411
1412 /* Disable interrupts */
1413 SetCOMInterrupts(self, FALSE);
1414
1415 free_irq(self->io.irq, dev);
1416 free_dma(self->io.dma);
1417
a97a6f10 1418 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
1da177e4
LT		 1419
1420 return 0;
1421}
1422
1423/*
1424 * Function ali_ircc_fir_hard_xmit (skb, dev)
1425 *
1426 * Transmit the frame
1427 *
1428 */
1429static int ali_ircc_fir_hard_xmit(struct sk_buff *skb, struct net_device *dev)
1430{
1431 struct ali_ircc_cb *self;
1432 unsigned long flags;
1433 int iobase;
1434 __u32 speed;
1435 int mtt, diff;
1436
a97a6f10 1437 IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __func__ );
1da177e4
LT		 1438
1439 self = (struct ali_ircc_cb *) dev->priv;
1440 iobase = self->io.fir_base;
1441
1442 netif_stop_queue(dev);
1443
1444 /* Make sure tests *& speed change are atomic */
1445 spin_lock_irqsave(&self->lock, flags);
1446
1447 /* Note : you should make sure that speed changes are not going
1448 * to corrupt any outgoing frame. Look at nsc-ircc for the gory
1449 * details - Jean II */
1450
1451 /* Check if we need to change the speed */
1452 speed = irda_get_next_speed(skb);
1453 if ((speed != self->io.speed) && (speed != -1)) {
1454 /* Check for empty frame */
1455 if (!skb->len) {
1456 ali_ircc_change_speed(self, speed);
1457 dev->trans_start = jiffies;
1458 spin_unlock_irqrestore(&self->lock, flags);
1459 dev_kfree_skb(skb);
1460 return 0;
1461 } else
1462 self->new_speed = speed;
1463 }
1464
1465 /* Register and copy this frame to DMA memory */
1466 self->tx_fifo.queue[self->tx_fifo.free].start = self->tx_fifo.tail;
1467 self->tx_fifo.queue[self->tx_fifo.free].len = skb->len;
1468 self->tx_fifo.tail += skb->len;
1469
1470 self->stats.tx_bytes += skb->len;
1471
d626f62b
ACM		 1472 skb_copy_from_linear_data(skb, self->tx_fifo.queue[self->tx_fifo.free].start,
1473 skb->len);
1da177e4
LT		 1474 self->tx_fifo.len++;
1475 self->tx_fifo.free++;
1476
1477 /* Start transmit only if there is currently no transmit going on */
1478 if (self->tx_fifo.len == 1)
1479 {
1480 /* Check if we must wait the min turn time or not */
1481 mtt = irda_get_mtt(skb);
1482
1483 if (mtt)
1484 {
1485 /* Check how much time we have used already */
1486 do_gettimeofday(&self->now);
1487
1488 diff = self->now.tv_usec - self->stamp.tv_usec;
1489 /* self->stamp is set from ali_ircc_dma_receive_complete() */
1490
a97a6f10 1491 IRDA_DEBUG(1, "%s(), ******* diff = %d ******* \n", __func__ , diff);
1da177e4
LT		 1492
1493 if (diff < 0)
1494 diff += 1000000;
1495
1496 /* Check if the mtt is larger than the time we have
1497 * already used by all the protocol processing
1498 */
1499 if (mtt > diff)
1500 {
1501 mtt -= diff;
1502
1503 /*
1504 * Use timer if delay larger than 1000 us, and
1505 * use udelay for smaller values which should
1506 * be acceptable
1507 */
1508 if (mtt > 500)
1509 {
1510 /* Adjust for timer resolution */
1511 mtt = (mtt+250) / 500; /* 4 discard, 5 get advanced, Let's round off */
1512
a97a6f10 1513 IRDA_DEBUG(1, "%s(), ************** mtt = %d ***********\n", __func__ , mtt);
1da177e4
LT		 1514
1515 /* Setup timer */
1516 if (mtt == 1) /* 500 us */
1517 {
1518 switch_bank(iobase, BANK1);
1519 outb(TIMER_IIR_500, iobase+FIR_TIMER_IIR);
1520 }
1521 else if (mtt == 2) /* 1 ms */
1522 {
1523 switch_bank(iobase, BANK1);
1524 outb(TIMER_IIR_1ms, iobase+FIR_TIMER_IIR);
1525 }
1526 else /* > 2ms -> 4ms */
1527 {
1528 switch_bank(iobase, BANK1);
1529 outb(TIMER_IIR_2ms, iobase+FIR_TIMER_IIR);
1530 }
1531
1532
1533 /* Start timer */
1534 outb(inb(iobase+FIR_CR) | CR_TIMER_EN, iobase+FIR_CR);
1535 self->io.direction = IO_XMIT;
1536
1537 /* Enable timer interrupt */
1538 self->ier = IER_TIMER;
1539 SetCOMInterrupts(self, TRUE);
1540
1541 /* Timer will take care of the rest */
1542 goto out;
1543 }
1544 else
1545 udelay(mtt);
1546 } // if (if (mtt > diff)
1547 }// if (mtt)
1548
1549 /* Enable EOM interrupt */
1550 self->ier = IER_EOM;
1551 SetCOMInterrupts(self, TRUE);
1552
1553 /* Transmit frame */
1554 ali_ircc_dma_xmit(self);
1555 } // if (self->tx_fifo.len == 1)
1556
1557 out:
1558
1559 /* Not busy transmitting anymore if window is not full */
1560 if (self->tx_fifo.free < MAX_TX_WINDOW)
1561 netif_wake_queue(self->netdev);
1562
1563 /* Restore bank register */
1564 switch_bank(iobase, BANK0);
1565
1566 dev->trans_start = jiffies;
1567 spin_unlock_irqrestore(&self->lock, flags);
1568 dev_kfree_skb(skb);
1569
a97a6f10 1570 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1da177e4
LT		 1571 return 0;
1572}
1573
1574
1575static void ali_ircc_dma_xmit(struct ali_ircc_cb *self)
1576{
1577 int iobase, tmp;
1578 unsigned char FIFO_OPTI, Hi, Lo;
1579
1580
a97a6f10 1581 IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __func__ );
1da177e4
LT		 1582
1583 iobase = self->io.fir_base;
1584
1585 /* FIFO threshold , this method comes from NDIS5 code */
1586
1587 if(self->tx_fifo.queue[self->tx_fifo.ptr].len < TX_FIFO_Threshold)
1588 FIFO_OPTI = self->tx_fifo.queue[self->tx_fifo.ptr].len-1;
1589 else
1590 FIFO_OPTI = TX_FIFO_Threshold;
1591
1592 /* Disable DMA */
1593 switch_bank(iobase, BANK1);
1594 outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1595
1596 self->io.direction = IO_XMIT;
1597
1598 irda_setup_dma(self->io.dma,
1599 ((u8 *)self->tx_fifo.queue[self->tx_fifo.ptr].start -
1600 self->tx_buff.head) + self->tx_buff_dma,
1601 self->tx_fifo.queue[self->tx_fifo.ptr].len,
1602 DMA_TX_MODE);
1603
1604 /* Reset Tx FIFO */
1605 switch_bank(iobase, BANK0);
1606 outb(LCR_A_FIFO_RESET, iobase+FIR_LCR_A);
1607
1608 /* Set Tx FIFO threshold */
1609 if (self->fifo_opti_buf!=FIFO_OPTI)
1610 {
1611 switch_bank(iobase, BANK1);
1612 outb(FIFO_OPTI, iobase+FIR_FIFO_TR) ;
1613 self->fifo_opti_buf=FIFO_OPTI;
1614 }
1615
1616 /* Set Tx DMA threshold */
1617 switch_bank(iobase, BANK1);
1618 outb(TX_DMA_Threshold, iobase+FIR_DMA_TR);
1619
1620 /* Set max Tx frame size */
1621 Hi = (self->tx_fifo.queue[self->tx_fifo.ptr].len >> 8) & 0x0f;
1622 Lo = self->tx_fifo.queue[self->tx_fifo.ptr].len & 0xff;
1623 switch_bank(iobase, BANK2);
1624 outb(Hi, iobase+FIR_TX_DSR_HI);
1625 outb(Lo, iobase+FIR_TX_DSR_LO);
1626
1627 /* Disable SIP , Disable Brick Wall (we don't support in TX mode), Change to TX mode */
1628 switch_bank(iobase, BANK0);
1629 tmp = inb(iobase+FIR_LCR_B);
1630 tmp &= ~0x20; // Disable SIP
1631 outb(((unsigned char)(tmp & 0x3f) | LCR_B_TX_MODE) & ~LCR_B_BW, iobase+FIR_LCR_B);
a97a6f10 1632 IRDA_DEBUG(1, "%s(), ******* Change to TX mode: FIR_LCR_B = 0x%x ******* \n", __func__ , inb(iobase+FIR_LCR_B));
1da177e4
LT		 1633
1634 outb(0, iobase+FIR_LSR);
1635
1636 /* Enable DMA and Burst Mode */
1637 switch_bank(iobase, BANK1);
1638 outb(inb(iobase+FIR_CR) | CR_DMA_EN | CR_DMA_BURST, iobase+FIR_CR);
1639
1640 switch_bank(iobase, BANK0);
1641
a97a6f10 1642 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1da177e4
LT		 1643}
1644
1645static int ali_ircc_dma_xmit_complete(struct ali_ircc_cb *self)
1646{
1647 int iobase;
1648 int ret = TRUE;
1649
a97a6f10 1650 IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __func__ );
1da177e4
LT		 1651
1652 iobase = self->io.fir_base;
1653
1654 /* Disable DMA */
1655 switch_bank(iobase, BANK1);
1656 outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1657
1658 /* Check for underrun! */
1659 switch_bank(iobase, BANK0);
1660 if((inb(iobase+FIR_LSR) & LSR_FRAME_ABORT) == LSR_FRAME_ABORT)
1661
1662 {
a97a6f10 1663 IRDA_ERROR("%s(), ********* LSR_FRAME_ABORT *********\n", __func__);
1da177e4
LT		 1664 self->stats.tx_errors++;
1665 self->stats.tx_fifo_errors++;
1666 }
1667 else
1668 {
1669 self->stats.tx_packets++;
1670 }
1671
1672 /* Check if we need to change the speed */
1673 if (self->new_speed)
1674 {
1675 ali_ircc_change_speed(self, self->new_speed);
1676 self->new_speed = 0;
1677 }
1678
1679 /* Finished with this frame, so prepare for next */
1680 self->tx_fifo.ptr++;
1681 self->tx_fifo.len--;
1682
1683 /* Any frames to be sent back-to-back? */
1684 if (self->tx_fifo.len)
1685 {
1686 ali_ircc_dma_xmit(self);
1687
1688 /* Not finished yet! */
1689 ret = FALSE;
1690 }
1691 else
1692 { /* Reset Tx FIFO info */
1693 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1694 self->tx_fifo.tail = self->tx_buff.head;
1695 }
1696
1697 /* Make sure we have room for more frames */
1698 if (self->tx_fifo.free < MAX_TX_WINDOW) {
1699 /* Not busy transmitting anymore */
1700 /* Tell the network layer, that we can accept more frames */
1701 netif_wake_queue(self->netdev);
1702 }
1703
1704 switch_bank(iobase, BANK0);
1705
a97a6f10 1706 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1da177e4
LT		 1707 return ret;
1708}
1709
1710/*
1711 * Function ali_ircc_dma_receive (self)
1712 *
1713 * Get ready for receiving a frame. The device will initiate a DMA
1714 * if it starts to receive a frame.
1715 *
1716 */
1717static int ali_ircc_dma_receive(struct ali_ircc_cb *self)
1718{
1719 int iobase, tmp;
1720
a97a6f10 1721 IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __func__ );
1da177e4
LT		 1722
1723 iobase = self->io.fir_base;
1724
1725 /* Reset Tx FIFO info */
1726 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1727 self->tx_fifo.tail = self->tx_buff.head;
1728
1729 /* Disable DMA */
1730 switch_bank(iobase, BANK1);
1731 outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1732
1733 /* Reset Message Count */
1734 switch_bank(iobase, BANK0);
1735 outb(0x07, iobase+FIR_LSR);
1736
1737 self->rcvFramesOverflow = FALSE;
1738
1739 self->LineStatus = inb(iobase+FIR_LSR) ;
1740
1741 /* Reset Rx FIFO info */
1742 self->io.direction = IO_RECV;
1743 self->rx_buff.data = self->rx_buff.head;
1744
1745 /* Reset Rx FIFO */
1746 // switch_bank(iobase, BANK0);
1747 outb(LCR_A_FIFO_RESET, iobase+FIR_LCR_A);
1748
1749 self->st_fifo.len = self->st_fifo.pending_bytes = 0;
1750 self->st_fifo.tail = self->st_fifo.head = 0;
1751
1752 irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize,
1753 DMA_RX_MODE);
1754
1755 /* Set Receive Mode,Brick Wall */
1756 //switch_bank(iobase, BANK0);
1757 tmp = inb(iobase+FIR_LCR_B);
1758 outb((unsigned char)(tmp &0x3f) | LCR_B_RX_MODE | LCR_B_BW , iobase + FIR_LCR_B); // 2000/12/1 05:16PM
a97a6f10 1759 IRDA_DEBUG(1, "%s(), *** Change To RX mode: FIR_LCR_B = 0x%x *** \n", __func__ , inb(iobase+FIR_LCR_B));
1da177e4
LT		 1760
1761 /* Set Rx Threshold */
1762 switch_bank(iobase, BANK1);
1763 outb(RX_FIFO_Threshold, iobase+FIR_FIFO_TR);
1764 outb(RX_DMA_Threshold, iobase+FIR_DMA_TR);
1765
1766 /* Enable DMA and Burst Mode */
1767 // switch_bank(iobase, BANK1);
1768 outb(CR_DMA_EN | CR_DMA_BURST, iobase+FIR_CR);
1769
1770 switch_bank(iobase, BANK0);
a97a6f10 1771 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1da177e4
LT		 1772 return 0;
1773}
1774
1775static int ali_ircc_dma_receive_complete(struct ali_ircc_cb *self)
1776{
1777 struct st_fifo *st_fifo;
1778 struct sk_buff *skb;
1779 __u8 status, MessageCount;
1780 int len, i, iobase, val;
1781
a97a6f10 1782 IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __func__ );
1da177e4
LT		 1783
1784 st_fifo = &self->st_fifo;
1785 iobase = self->io.fir_base;
1786
1787 switch_bank(iobase, BANK0);
1788 MessageCount = inb(iobase+ FIR_LSR)&0x07;
1789
1790 if (MessageCount > 0)
a97a6f10 1791 IRDA_DEBUG(0, "%s(), Messsage count = %d,\n", __func__ , MessageCount);
1da177e4
LT		 1792
1793 for (i=0; i<=MessageCount; i++)
1794 {
1795 /* Bank 0 */
1796 switch_bank(iobase, BANK0);
1797 status = inb(iobase+FIR_LSR);
1798
1799 switch_bank(iobase, BANK2);
1800 len = inb(iobase+FIR_RX_DSR_HI) & 0x0f;
1801 len = len << 8;
1802 len |= inb(iobase+FIR_RX_DSR_LO);
1803
a97a6f10
HH		 1804 IRDA_DEBUG(1, "%s(), RX Length = 0x%.2x,\n", __func__ , len);
1805 IRDA_DEBUG(1, "%s(), RX Status = 0x%.2x,\n", __func__ , status);
1da177e4
LT		 1806
1807 if (st_fifo->tail >= MAX_RX_WINDOW) {
a97a6f10 1808 IRDA_DEBUG(0, "%s(), window is full!\n", __func__ );
1da177e4
LT		 1809 continue;
1810 }
1811
1812 st_fifo->entries[st_fifo->tail].status = status;
1813 st_fifo->entries[st_fifo->tail].len = len;
1814 st_fifo->pending_bytes += len;
1815 st_fifo->tail++;
1816 st_fifo->len++;
1817 }
1818
1819 for (i=0; i<=MessageCount; i++)
1820 {
1821 /* Get first entry */
1822 status = st_fifo->entries[st_fifo->head].status;
1823 len = st_fifo->entries[st_fifo->head].len;
1824 st_fifo->pending_bytes -= len;
1825 st_fifo->head++;
1826 st_fifo->len--;
1827
1828 /* Check for errors */
1829 if ((status & 0xd8) || self->rcvFramesOverflow || (len==0))
1830 {
a97a6f10 1831 IRDA_DEBUG(0,"%s(), ************* RX Errors ************ \n", __func__ );
1da177e4
LT		 1832
1833 /* Skip frame */
1834 self->stats.rx_errors++;
1835
1836 self->rx_buff.data += len;
1837
1838 if (status & LSR_FIFO_UR)
1839 {
1840 self->stats.rx_frame_errors++;
a97a6f10 1841 IRDA_DEBUG(0,"%s(), ************* FIFO Errors ************ \n", __func__ );
1da177e4
LT		 1842 }
1843 if (status & LSR_FRAME_ERROR)
1844 {
1845 self->stats.rx_frame_errors++;
a97a6f10 1846 IRDA_DEBUG(0,"%s(), ************* FRAME Errors ************ \n", __func__ );
1da177e4
LT		 1847 }
1848
1849 if (status & LSR_CRC_ERROR)
1850 {
1851 self->stats.rx_crc_errors++;
a97a6f10 1852 IRDA_DEBUG(0,"%s(), ************* CRC Errors ************ \n", __func__ );
1da177e4
LT		 1853 }
1854
1855 if(self->rcvFramesOverflow)
1856 {
1857 self->stats.rx_frame_errors++;
a97a6f10 1858 IRDA_DEBUG(0,"%s(), ************* Overran DMA buffer ************ \n", __func__ );
1da177e4
LT		 1859 }
1860 if(len == 0)
1861 {
1862 self->stats.rx_frame_errors++;
a97a6f10 1863 IRDA_DEBUG(0,"%s(), ********** Receive Frame Size = 0 ********* \n", __func__ );
1da177e4
LT		 1864 }
1865 }
1866 else
1867 {
1868
1869 if (st_fifo->pending_bytes < 32)
1870 {
1871 switch_bank(iobase, BANK0);
1872 val = inb(iobase+FIR_BSR);
1873 if ((val& BSR_FIFO_NOT_EMPTY)== 0x80)
1874 {
a97a6f10 1875 IRDA_DEBUG(0, "%s(), ************* BSR_FIFO_NOT_EMPTY ************ \n", __func__ );
1da177e4
LT		 1876
1877 /* Put this entry back in fifo */
1878 st_fifo->head--;
1879 st_fifo->len++;
1880 st_fifo->pending_bytes += len;
1881 st_fifo->entries[st_fifo->head].status = status;
1882 st_fifo->entries[st_fifo->head].len = len;
1883
1884 /*
1885 * DMA not finished yet, so try again
1886 * later, set timer value, resolution
1887 * 500 us
1888 */
1889
1890 switch_bank(iobase, BANK1);
1891 outb(TIMER_IIR_500, iobase+FIR_TIMER_IIR); // 2001/1/2 05:07PM
1892
1893 /* Enable Timer */
1894 outb(inb(iobase+FIR_CR) | CR_TIMER_EN, iobase+FIR_CR);
1895
1896 return FALSE; /* I'll be back! */
1897 }
1898 }
1899
1900 /*
1901 * Remember the time we received this frame, so we can
1902 * reduce the min turn time a bit since we will know
1903 * how much time we have used for protocol processing
1904 */
1905 do_gettimeofday(&self->stamp);
1906
1907 skb = dev_alloc_skb(len+1);
1908 if (skb == NULL)
1909 {
1910 IRDA_WARNING("%s(), memory squeeze, "
1911 "dropping frame.\n",
a97a6f10 1912 __func__);
1da177e4
LT		 1913 self->stats.rx_dropped++;
1914
1915 return FALSE;
1916 }
1917
1918 /* Make sure IP header gets aligned */
1919 skb_reserve(skb, 1);
1920
1921 /* Copy frame without CRC, CRC is removed by hardware*/
1922 skb_put(skb, len);
27d7ff46 1923 skb_copy_to_linear_data(skb, self->rx_buff.data, len);
1da177e4
LT		 1924
1925 /* Move to next frame */
1926 self->rx_buff.data += len;
1927 self->stats.rx_bytes += len;
1928 self->stats.rx_packets++;
1929
1930 skb->dev = self->netdev;
459a98ed 1931 skb_reset_mac_header(skb);
1da177e4
LT		 1932 skb->protocol = htons(ETH_P_IRDA);
1933 netif_rx(skb);
1da177e4
LT		 1934 }
1935 }
1936
1937 switch_bank(iobase, BANK0);
1938
a97a6f10 1939 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1da177e4
LT		 1940 return TRUE;
1941}
1942
1943
1944
1945/*
1946 * Function ali_ircc_sir_hard_xmit (skb, dev)
1947 *
1948 * Transmit the frame!
1949 *
1950 */
1951static int ali_ircc_sir_hard_xmit(struct sk_buff *skb, struct net_device *dev)
1952{
1953 struct ali_ircc_cb *self;
1954 unsigned long flags;
1955 int iobase;
1956 __u32 speed;
1957
a97a6f10 1958 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__ );
1da177e4
LT		 1959
1960 IRDA_ASSERT(dev != NULL, return 0;);
1961
1962 self = (struct ali_ircc_cb *) dev->priv;
1963 IRDA_ASSERT(self != NULL, return 0;);
1964
1965 iobase = self->io.sir_base;
1966
1967 netif_stop_queue(dev);
1968
1969 /* Make sure tests *& speed change are atomic */
1970 spin_lock_irqsave(&self->lock, flags);
1971
1972 /* Note : you should make sure that speed changes are not going
1973 * to corrupt any outgoing frame. Look at nsc-ircc for the gory
1974 * details - Jean II */
1975
1976 /* Check if we need to change the speed */
1977 speed = irda_get_next_speed(skb);
1978 if ((speed != self->io.speed) && (speed != -1)) {
1979 /* Check for empty frame */
1980 if (!skb->len) {
1981 ali_ircc_change_speed(self, speed);
1982 dev->trans_start = jiffies;
1983 spin_unlock_irqrestore(&self->lock, flags);
1984 dev_kfree_skb(skb);
1985 return 0;
1986 } else
1987 self->new_speed = speed;
1988 }
1989
1990 /* Init tx buffer */
1991 self->tx_buff.data = self->tx_buff.head;
1992
1993 /* Copy skb to tx_buff while wrapping, stuffing and making CRC */
1994 self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data,
1995 self->tx_buff.truesize);
1996
1997 self->stats.tx_bytes += self->tx_buff.len;
1998
1999 /* Turn on transmit finished interrupt. Will fire immediately! */
2000 outb(UART_IER_THRI, iobase+UART_IER);
2001
2002 dev->trans_start = jiffies;
2003 spin_unlock_irqrestore(&self->lock, flags);
2004
2005 dev_kfree_skb(skb);
2006
a97a6f10 2007 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
1da177e4
LT		 2008
2009 return 0;
2010}
2011
2012
2013/*
2014 * Function ali_ircc_net_ioctl (dev, rq, cmd)
2015 *
2016 * Process IOCTL commands for this device
2017 *
2018 */
2019static int ali_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2020{
2021 struct if_irda_req *irq = (struct if_irda_req *) rq;
2022 struct ali_ircc_cb *self;
2023 unsigned long flags;
2024 int ret = 0;
2025
a97a6f10 2026 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__ );
1da177e4
LT		 2027
2028 IRDA_ASSERT(dev != NULL, return -1;);
2029
2030 self = dev->priv;
2031
2032 IRDA_ASSERT(self != NULL, return -1;);
2033
a97a6f10 2034 IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __func__ , dev->name, cmd);
1da177e4
LT		 2035
2036 switch (cmd) {
2037 case SIOCSBANDWIDTH: /* Set bandwidth */
a97a6f10 2038 IRDA_DEBUG(1, "%s(), SIOCSBANDWIDTH\n", __func__ );
1da177e4
LT		 2039 /*
2040 * This function will also be used by IrLAP to change the
2041 * speed, so we still must allow for speed change within
2042 * interrupt context.
2043 */
2044 if (!in_interrupt() && !capable(CAP_NET_ADMIN))
2045 return -EPERM;
2046
2047 spin_lock_irqsave(&self->lock, flags);
2048 ali_ircc_change_speed(self, irq->ifr_baudrate);
2049 spin_unlock_irqrestore(&self->lock, flags);
2050 break;
2051 case SIOCSMEDIABUSY: /* Set media busy */
a97a6f10 2052 IRDA_DEBUG(1, "%s(), SIOCSMEDIABUSY\n", __func__ );
1da177e4
LT		 2053 if (!capable(CAP_NET_ADMIN))
2054 return -EPERM;
2055 irda_device_set_media_busy(self->netdev, TRUE);
2056 break;
2057 case SIOCGRECEIVING: /* Check if we are receiving right now */
a97a6f10 2058 IRDA_DEBUG(2, "%s(), SIOCGRECEIVING\n", __func__ );
1da177e4
LT		 2059 /* This is protected */
2060 irq->ifr_receiving = ali_ircc_is_receiving(self);
2061 break;
2062 default:
2063 ret = -EOPNOTSUPP;
2064 }
2065
a97a6f10 2066 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
1da177e4
LT		 2067
2068 return ret;
2069}
2070
2071/*
2072 * Function ali_ircc_is_receiving (self)
2073 *
2074 * Return TRUE is we are currently receiving a frame
2075 *
2076 */
2077static int ali_ircc_is_receiving(struct ali_ircc_cb *self)
2078{
2079 unsigned long flags;
2080 int status = FALSE;
2081 int iobase;
2082
a97a6f10 2083 IRDA_DEBUG(2, "%s(), ---------------- Start -----------------\n", __func__ );
1da177e4
LT		 2084
2085 IRDA_ASSERT(self != NULL, return FALSE;);
2086
2087 spin_lock_irqsave(&self->lock, flags);
2088
2089 if (self->io.speed > 115200)
2090 {
2091 iobase = self->io.fir_base;
2092
2093 switch_bank(iobase, BANK1);
2094 if((inb(iobase+FIR_FIFO_FR) & 0x3f) != 0)
2095 {
2096 /* We are receiving something */
a97a6f10 2097 IRDA_DEBUG(1, "%s(), We are receiving something\n", __func__ );
1da177e4
LT		 2098 status = TRUE;
2099 }
2100 switch_bank(iobase, BANK0);
2101 }
2102 else
2103 {
2104 status = (self->rx_buff.state != OUTSIDE_FRAME);
2105 }
2106
2107 spin_unlock_irqrestore(&self->lock, flags);
2108
a97a6f10 2109 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
1da177e4
LT		 2110
2111 return status;
2112}
2113
2114static struct net_device_stats *ali_ircc_net_get_stats(struct net_device *dev)
2115{
2116 struct ali_ircc_cb *self = (struct ali_ircc_cb *) dev->priv;
2117
a97a6f10 2118 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__ );
1da177e4 2119
a97a6f10 2120 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
1da177e4
LT		 2121
2122 return &self->stats;
2123}
2124
898b1d16 2125static int ali_ircc_suspend(struct platform_device *dev, pm_message_t state)
1da177e4 2126{
898b1d16 2127 struct ali_ircc_cb *self = platform_get_drvdata(dev);
1da177e4 2128
898b1d16 2129 IRDA_MESSAGE("%s, Suspending\n", ALI_IRCC_DRIVER_NAME);
1da177e4
LT		 2130
2131 if (self->io.suspended)
898b1d16 2132 return 0;
1da177e4
LT		 2133
2134 ali_ircc_net_close(self->netdev);
2135
2136 self->io.suspended = 1;
2137
898b1d16 2138 return 0;
1da177e4
LT		 2139}
2140
898b1d16 2141static int ali_ircc_resume(struct platform_device *dev)
1da177e4 2142{
898b1d16 2143 struct ali_ircc_cb *self = platform_get_drvdata(dev);
1da177e4
LT		 2144
2145 if (!self->io.suspended)
898b1d16 2146 return 0;
1da177e4
LT		 2147
2148 ali_ircc_net_open(self->netdev);
2149
898b1d16 2150 IRDA_MESSAGE("%s, Waking up\n", ALI_IRCC_DRIVER_NAME);
1da177e4
LT		 2151
2152 self->io.suspended = 0;
1da177e4 2153
1da177e4
LT		 2154 return 0;
2155}
2156
1da177e4
LT		 2157/* ALi Chip Function */
2158
2159static void SetCOMInterrupts(struct ali_ircc_cb *self , unsigned char enable)
2160{
2161
2162 unsigned char newMask;
2163
2164 int iobase = self->io.fir_base; /* or sir_base */
2165
a97a6f10 2166 IRDA_DEBUG(2, "%s(), -------- Start -------- ( Enable = %d )\n", __func__ , enable);
1da177e4
LT		 2167
2168 /* Enable the interrupt which we wish to */
2169 if (enable){
2170 if (self->io.direction == IO_XMIT)
2171 {
2172 if (self->io.speed > 115200) /* FIR, MIR */
2173 {
2174 newMask = self->ier;
2175 }
2176 else /* SIR */
2177 {
2178 newMask = UART_IER_THRI | UART_IER_RDI;
2179 }
2180 }
2181 else {
2182 if (self->io.speed > 115200) /* FIR, MIR */
2183 {
2184 newMask = self->ier;
2185 }
2186 else /* SIR */
2187 {
2188 newMask = UART_IER_RDI;
2189 }
2190 }
2191 }
2192 else /* Disable all the interrupts */
2193 {
2194 newMask = 0x00;
2195
2196 }
2197
2198 //SIR and FIR has different registers
2199 if (self->io.speed > 115200)
2200 {
2201 switch_bank(iobase, BANK0);
2202 outb(newMask, iobase+FIR_IER);
2203 }
2204 else
2205 outb(newMask, iobase+UART_IER);
2206
a97a6f10 2207 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
1da177e4
LT		 2208}
2209
2210static void SIR2FIR(int iobase)
2211{
2212 //unsigned char tmp;
2213
a97a6f10 2214 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__ );
1da177e4
LT		 2215
2216 /* Already protected (change_speed() or setup()), no need to lock.
2217 * Jean II */
2218
2219 outb(0x28, iobase+UART_MCR);
2220 outb(0x68, iobase+UART_MCR);
2221 outb(0x88, iobase+UART_MCR);
2222
2223 outb(0x60, iobase+FIR_MCR); /* Master Reset */
2224 outb(0x20, iobase+FIR_MCR); /* Master Interrupt Enable */
2225
2226 //tmp = inb(iobase+FIR_LCR_B); /* SIP enable */
2227 //tmp |= 0x20;
2228 //outb(tmp, iobase+FIR_LCR_B);
2229
a97a6f10 2230 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1da177e4
LT		 2231}
2232
2233static void FIR2SIR(int iobase)
2234{
2235 unsigned char val;
2236
a97a6f10 2237 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__ );
1da177e4
LT		 2238
2239 /* Already protected (change_speed() or setup()), no need to lock.
2240 * Jean II */
2241
2242 outb(0x20, iobase+FIR_MCR); /* IRQ to low */
2243 outb(0x00, iobase+UART_IER);
2244
2245 outb(0xA0, iobase+FIR_MCR); /* Don't set master reset */
2246 outb(0x00, iobase+UART_FCR);
2247 outb(0x07, iobase+UART_FCR);
2248
2249 val = inb(iobase+UART_RX);
2250 val = inb(iobase+UART_LSR);
2251 val = inb(iobase+UART_MSR);
2252
a97a6f10 2253 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1da177e4
LT		 2254}
2255
2256MODULE_AUTHOR("Benjamin Kong <benjamin_kong@ali.com.tw>");
2257MODULE_DESCRIPTION("ALi FIR Controller Driver");
2258MODULE_LICENSE("GPL");
72abb461 2259MODULE_ALIAS("platform:" ALI_IRCC_DRIVER_NAME);
1da177e4
LT		 2260
2261
2262module_param_array(io, int, NULL, 0);
2263MODULE_PARM_DESC(io, "Base I/O addresses");
2264module_param_array(irq, int, NULL, 0);
2265MODULE_PARM_DESC(irq, "IRQ lines");
2266module_param_array(dma, int, NULL, 0);
2267MODULE_PARM_DESC(dma, "DMA channels");
2268
2269module_init(ali_ircc_init);
2270module_exit(ali_ircc_cleanup);
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