ali-ircc.c revision 19299b34b42f4d37be2ce9b411664f37ca10ff61 
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 */
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,
63		.owner	= THIS_MODULE,
64	},
65};
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);
111static void ali_ircc_change_speed(struct ali_ircc_cb *self, __u32 baud);
112
113/* SIR function */
114static netdev_tx_t ali_ircc_sir_hard_xmit(struct sk_buff *skb,
115						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 netdev_tx_t  ali_ircc_fir_hard_xmit(struct sk_buff *skb,
124						 struct net_device *dev);
125static void ali_ircc_fir_change_speed(struct ali_ircc_cb *priv, __u32 speed);
126static irqreturn_t ali_ircc_fir_interrupt(struct ali_ircc_cb *self);
127static int  ali_ircc_dma_receive(struct ali_ircc_cb *self);
128static int  ali_ircc_dma_receive_complete(struct ali_ircc_cb *self);
129static int  ali_ircc_dma_xmit_complete(struct ali_ircc_cb *self);
130static void ali_ircc_dma_xmit(struct ali_ircc_cb *self);
131
132/* My Function */
133static int  ali_ircc_read_dongle_id (int i, chipio_t *info);
134static void ali_ircc_change_dongle_speed(struct ali_ircc_cb *priv, int speed);
135
136/* ALi chip function */
137static void SIR2FIR(int iobase);
138static void FIR2SIR(int iobase);
139static void SetCOMInterrupts(struct ali_ircc_cb *self , unsigned char enable);
140
141/*
142 * Function ali_ircc_init ()
143 *
144 *    Initialize chip. Find out whay kinds of chips we are dealing with
145 *    and their configuation registers address
146 */
147static int __init ali_ircc_init(void)
148{
149	ali_chip_t *chip;
150	chipio_t info;
151	int ret;
152	int cfg, cfg_base;
153	int reg, revision;
154	int i = 0;
155
156	IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
157
158	ret = platform_driver_register(&ali_ircc_driver);
159        if (ret) {
160                IRDA_ERROR("%s, Can't register driver!\n",
161			   ALI_IRCC_DRIVER_NAME);
162                return ret;
163        }
164
165	ret = -ENODEV;
166
167	/* Probe for all the ALi chipsets we know about */
168	for (chip= chips; chip->name; chip++, i++)
169	{
170		IRDA_DEBUG(2, "%s(), Probing for %s ...\n", __func__, chip->name);
171
172		/* Try all config registers for this chip */
173		for (cfg=0; cfg<2; cfg++)
174		{
175			cfg_base = chip->cfg[cfg];
176			if (!cfg_base)
177				continue;
178
179			memset(&info, 0, sizeof(chipio_t));
180			info.cfg_base = cfg_base;
181			info.fir_base = io[i];
182			info.dma = dma[i];
183			info.irq = irq[i];
184
185
186			/* Enter Configuration */
187			outb(chip->entr1, cfg_base);
188			outb(chip->entr2, cfg_base);
189
190			/* Select Logical Device 5 Registers (UART2) */
191			outb(0x07, cfg_base);
192			outb(0x05, cfg_base+1);
193
194			/* Read Chip Identification Register */
195			outb(chip->cid_index, cfg_base);
196			reg = inb(cfg_base+1);
197
198			if (reg == chip->cid_value)
199			{
200				IRDA_DEBUG(2, "%s(), Chip found at 0x%03x\n", __func__, cfg_base);
201
202				outb(0x1F, cfg_base);
203				revision = inb(cfg_base+1);
204				IRDA_DEBUG(2, "%s(), Found %s chip, revision=%d\n", __func__,
205					   chip->name, revision);
206
207				/*
208				 * If the user supplies the base address, then
209				 * we init the chip, if not we probe the values
210				 * set by the BIOS
211				 */
212				if (io[i] < 2000)
213				{
214					chip->init(chip, &info);
215				}
216				else
217				{
218					chip->probe(chip, &info);
219				}
220
221				if (ali_ircc_open(i, &info) == 0)
222					ret = 0;
223				i++;
224			}
225			else
226			{
227				IRDA_DEBUG(2, "%s(), No %s chip at 0x%03x\n", __func__, chip->name, cfg_base);
228			}
229			/* Exit configuration */
230			outb(0xbb, cfg_base);
231		}
232	}
233
234	IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __func__);
235
236	if (ret)
237		platform_driver_unregister(&ali_ircc_driver);
238
239	return ret;
240}
241
242/*
243 * Function ali_ircc_cleanup ()
244 *
245 *    Close all configured chips
246 *
247 */
248static void __exit ali_ircc_cleanup(void)
249{
250	int i;
251
252	IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
253
254	for (i=0; i < ARRAY_SIZE(dev_self); i++) {
255		if (dev_self[i])
256			ali_ircc_close(dev_self[i]);
257	}
258
259	platform_driver_unregister(&ali_ircc_driver);
260
261	IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __func__);
262}
263
264static const struct net_device_ops ali_ircc_sir_ops = {
265	.ndo_open       = ali_ircc_net_open,
266	.ndo_stop       = ali_ircc_net_close,
267	.ndo_start_xmit = ali_ircc_sir_hard_xmit,
268	.ndo_do_ioctl   = ali_ircc_net_ioctl,
269};
270
271static const struct net_device_ops ali_ircc_fir_ops = {
272	.ndo_open       = ali_ircc_net_open,
273	.ndo_stop       = ali_ircc_net_close,
274	.ndo_start_xmit = ali_ircc_fir_hard_xmit,
275	.ndo_do_ioctl   = ali_ircc_net_ioctl,
276};
277
278/*
279 * Function ali_ircc_open (int i, chipio_t *inf)
280 *
281 *    Open driver instance
282 *
283 */
284static int ali_ircc_open(int i, chipio_t *info)
285{
286	struct net_device *dev;
287	struct ali_ircc_cb *self;
288	int dongle_id;
289	int err;
290
291	IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
292
293	if (i >= ARRAY_SIZE(dev_self)) {
294		IRDA_ERROR("%s(), maximum number of supported chips reached!\n",
295			   __func__);
296		return -ENOMEM;
297	}
298
299	/* Set FIR FIFO and DMA Threshold */
300	if ((ali_ircc_setup(info)) == -1)
301		return -1;
302
303	dev = alloc_irdadev(sizeof(*self));
304	if (dev == NULL) {
305		IRDA_ERROR("%s(), can't allocate memory for control block!\n",
306			   __func__);
307		return -ENOMEM;
308	}
309
310	self = netdev_priv(dev);
311	self->netdev = dev;
312	spin_lock_init(&self->lock);
313
314	/* Need to store self somewhere */
315	dev_self[i] = self;
316	self->index = i;
317
318	/* Initialize IO */
319	self->io.cfg_base  = info->cfg_base;	/* In ali_ircc_probe_53 assign 		*/
320	self->io.fir_base  = info->fir_base;	/* info->sir_base = info->fir_base 	*/
321	self->io.sir_base  = info->sir_base; 	/* ALi SIR and FIR use the same address */
322        self->io.irq       = info->irq;
323        self->io.fir_ext   = CHIP_IO_EXTENT;
324        self->io.dma       = info->dma;
325        self->io.fifo_size = 16;		/* SIR: 16, FIR: 32 Benjamin 2000/11/1 */
326
327	/* Reserve the ioports that we need */
328	if (!request_region(self->io.fir_base, self->io.fir_ext,
329			    ALI_IRCC_DRIVER_NAME)) {
330		IRDA_WARNING("%s(), can't get iobase of 0x%03x\n", __func__,
331			self->io.fir_base);
332		err = -ENODEV;
333		goto err_out1;
334	}
335
336	/* Initialize QoS for this device */
337	irda_init_max_qos_capabilies(&self->qos);
338
339	/* The only value we must override it the baudrate */
340	self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
341		IR_115200|IR_576000|IR_1152000|(IR_4000000 << 8); // benjamin 2000/11/8 05:27PM
342
343	self->qos.min_turn_time.bits = qos_mtt_bits;
344
345	irda_qos_bits_to_value(&self->qos);
346
347	/* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
348	self->rx_buff.truesize = 14384;
349	self->tx_buff.truesize = 14384;
350
351	/* Allocate memory if needed */
352	self->rx_buff.head =
353		dma_alloc_coherent(NULL, self->rx_buff.truesize,
354				   &self->rx_buff_dma, GFP_KERNEL);
355	if (self->rx_buff.head == NULL) {
356		err = -ENOMEM;
357		goto err_out2;
358	}
359	memset(self->rx_buff.head, 0, self->rx_buff.truesize);
360
361	self->tx_buff.head =
362		dma_alloc_coherent(NULL, self->tx_buff.truesize,
363				   &self->tx_buff_dma, GFP_KERNEL);
364	if (self->tx_buff.head == NULL) {
365		err = -ENOMEM;
366		goto err_out3;
367	}
368	memset(self->tx_buff.head, 0, self->tx_buff.truesize);
369
370	self->rx_buff.in_frame = FALSE;
371	self->rx_buff.state = OUTSIDE_FRAME;
372	self->tx_buff.data = self->tx_buff.head;
373	self->rx_buff.data = self->rx_buff.head;
374
375	/* Reset Tx queue info */
376	self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
377	self->tx_fifo.tail = self->tx_buff.head;
378
379	/* Override the network functions we need to use */
380	dev->netdev_ops = &ali_ircc_sir_ops;
381
382	err = register_netdev(dev);
383	if (err) {
384		IRDA_ERROR("%s(), register_netdev() failed!\n", __func__);
385		goto err_out4;
386	}
387	IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);
388
389	/* Check dongle id */
390	dongle_id = ali_ircc_read_dongle_id(i, info);
391	IRDA_MESSAGE("%s(), %s, Found dongle: %s\n", __func__,
392		     ALI_IRCC_DRIVER_NAME, dongle_types[dongle_id]);
393
394	self->io.dongle_id = dongle_id;
395
396	IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __func__);
397
398	return 0;
399
400 err_out4:
401	dma_free_coherent(NULL, self->tx_buff.truesize,
402			  self->tx_buff.head, self->tx_buff_dma);
403 err_out3:
404	dma_free_coherent(NULL, self->rx_buff.truesize,
405			  self->rx_buff.head, self->rx_buff_dma);
406 err_out2:
407	release_region(self->io.fir_base, self->io.fir_ext);
408 err_out1:
409	dev_self[i] = NULL;
410	free_netdev(dev);
411	return err;
412}
413
414
415/*
416 * Function ali_ircc_close (self)
417 *
418 *    Close driver instance
419 *
420 */
421static int __exit ali_ircc_close(struct ali_ircc_cb *self)
422{
423	int iobase;
424
425	IRDA_DEBUG(4, "%s(), ---------------- Start ----------------\n", __func__);
426
427	IRDA_ASSERT(self != NULL, return -1;);
428
429        iobase = self->io.fir_base;
430
431	/* Remove netdevice */
432	unregister_netdev(self->netdev);
433
434	/* Release the PORT that this driver is using */
435	IRDA_DEBUG(4, "%s(), Releasing Region %03x\n", __func__, self->io.fir_base);
436	release_region(self->io.fir_base, self->io.fir_ext);
437
438	if (self->tx_buff.head)
439		dma_free_coherent(NULL, self->tx_buff.truesize,
440				  self->tx_buff.head, self->tx_buff_dma);
441
442	if (self->rx_buff.head)
443		dma_free_coherent(NULL, self->rx_buff.truesize,
444				  self->rx_buff.head, self->rx_buff_dma);
445
446	dev_self[self->index] = NULL;
447	free_netdev(self->netdev);
448
449	IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __func__);
450
451	return 0;
452}
453
454/*
455 * Function ali_ircc_init_43 (chip, info)
456 *
457 *    Initialize the ALi M1543 chip.
458 */
459static int ali_ircc_init_43(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_init_53 (chip, info)
470 *
471 *    Initialize the ALi M1535 chip.
472 */
473static int ali_ircc_init_53(ali_chip_t *chip, chipio_t *info)
474{
475	/* All controller information like I/O address, DMA channel, IRQ
476	 * are set by BIOS
477	 */
478
479	return 0;
480}
481
482/*
483 * Function ali_ircc_probe_53 (chip, info)
484 *
485 *	Probes for the ALi M1535D or M1535
486 */
487static int ali_ircc_probe_53(ali_chip_t *chip, chipio_t *info)
488{
489	int cfg_base = info->cfg_base;
490	int hi, low, reg;
491
492	IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
493
494	/* Enter Configuration */
495	outb(chip->entr1, cfg_base);
496	outb(chip->entr2, cfg_base);
497
498	/* Select Logical Device 5 Registers (UART2) */
499	outb(0x07, cfg_base);
500	outb(0x05, cfg_base+1);
501
502	/* Read address control register */
503	outb(0x60, cfg_base);
504	hi = inb(cfg_base+1);
505	outb(0x61, cfg_base);
506	low = inb(cfg_base+1);
507	info->fir_base = (hi<<8) + low;
508
509	info->sir_base = info->fir_base;
510
511	IRDA_DEBUG(2, "%s(), probing fir_base=0x%03x\n", __func__, info->fir_base);
512
513	/* Read IRQ control register */
514	outb(0x70, cfg_base);
515	reg = inb(cfg_base+1);
516	info->irq = reg & 0x0f;
517	IRDA_DEBUG(2, "%s(), probing irq=%d\n", __func__, info->irq);
518
519	/* Read DMA channel */
520	outb(0x74, cfg_base);
521	reg = inb(cfg_base+1);
522	info->dma = reg & 0x07;
523
524	if(info->dma == 0x04)
525		IRDA_WARNING("%s(), No DMA channel assigned !\n", __func__);
526	else
527		IRDA_DEBUG(2, "%s(), probing dma=%d\n", __func__, info->dma);
528
529	/* Read Enabled Status */
530	outb(0x30, cfg_base);
531	reg = inb(cfg_base+1);
532	info->enabled = (reg & 0x80) && (reg & 0x01);
533	IRDA_DEBUG(2, "%s(), probing enabled=%d\n", __func__, info->enabled);
534
535	/* Read Power Status */
536	outb(0x22, cfg_base);
537	reg = inb(cfg_base+1);
538	info->suspended = (reg & 0x20);
539	IRDA_DEBUG(2, "%s(), probing suspended=%d\n", __func__, info->suspended);
540
541	/* Exit configuration */
542	outb(0xbb, cfg_base);
543
544	IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __func__);
545
546	return 0;
547}
548
549/*
550 * Function ali_ircc_setup (info)
551 *
552 *    	Set FIR FIFO and DMA Threshold
553 *	Returns non-negative on success.
554 *
555 */
556static int ali_ircc_setup(chipio_t *info)
557{
558	unsigned char tmp;
559	int version;
560	int iobase = info->fir_base;
561
562	IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
563
564	/* Locking comments :
565	 * Most operations here need to be protected. We are called before
566	 * the device instance is created in ali_ircc_open(), therefore
567	 * nobody can bother us - Jean II */
568
569	/* Switch to FIR space */
570	SIR2FIR(iobase);
571
572	/* Master Reset */
573	outb(0x40, iobase+FIR_MCR); // benjamin 2000/11/30 11:45AM
574
575	/* Read FIR ID Version Register */
576	switch_bank(iobase, BANK3);
577	version = inb(iobase+FIR_ID_VR);
578
579	/* Should be 0x00 in the M1535/M1535D */
580	if(version != 0x00)
581	{
582		IRDA_ERROR("%s, Wrong chip version %02x\n",
583			   ALI_IRCC_DRIVER_NAME, version);
584		return -1;
585	}
586
587	/* Set FIR FIFO Threshold Register */
588	switch_bank(iobase, BANK1);
589	outb(RX_FIFO_Threshold, iobase+FIR_FIFO_TR);
590
591	/* Set FIR DMA Threshold Register */
592	outb(RX_DMA_Threshold, iobase+FIR_DMA_TR);
593
594	/* CRC enable */
595	switch_bank(iobase, BANK2);
596	outb(inb(iobase+FIR_IRDA_CR) | IRDA_CR_CRC, iobase+FIR_IRDA_CR);
597
598	/* NDIS driver set TX Length here BANK2 Alias 3, Alias4*/
599
600	/* Switch to Bank 0 */
601	switch_bank(iobase, BANK0);
602
603	tmp = inb(iobase+FIR_LCR_B);
604	tmp &=~0x20; // disable SIP
605	tmp |= 0x80; // these two steps make RX mode
606	tmp &= 0xbf;
607	outb(tmp, iobase+FIR_LCR_B);
608
609	/* Disable Interrupt */
610	outb(0x00, iobase+FIR_IER);
611
612
613	/* Switch to SIR space */
614	FIR2SIR(iobase);
615
616	IRDA_MESSAGE("%s, driver loaded (Benjamin Kong)\n",
617		     ALI_IRCC_DRIVER_NAME);
618
619	/* Enable receive interrupts */
620	// outb(UART_IER_RDI, iobase+UART_IER); //benjamin 2000/11/23 01:25PM
621	// Turn on the interrupts in ali_ircc_net_open
622
623	IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__);
624
625	return 0;
626}
627
628/*
629 * Function ali_ircc_read_dongle_id (int index, info)
630 *
631 * Try to read dongle indentification. This procedure needs to be executed
632 * once after power-on/reset. It also needs to be used whenever you suspect
633 * that the user may have plugged/unplugged the IrDA Dongle.
634 */
635static int ali_ircc_read_dongle_id (int i, chipio_t *info)
636{
637	int dongle_id, reg;
638	int cfg_base = info->cfg_base;
639
640	IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
641
642	/* Enter Configuration */
643	outb(chips[i].entr1, cfg_base);
644	outb(chips[i].entr2, cfg_base);
645
646	/* Select Logical Device 5 Registers (UART2) */
647	outb(0x07, cfg_base);
648	outb(0x05, cfg_base+1);
649
650	/* Read Dongle ID */
651	outb(0xf0, cfg_base);
652	reg = inb(cfg_base+1);
653	dongle_id = ((reg>>6)&0x02) | ((reg>>5)&0x01);
654	IRDA_DEBUG(2, "%s(), probing dongle_id=%d, dongle_types=%s\n", __func__,
655		dongle_id, dongle_types[dongle_id]);
656
657	/* Exit configuration */
658	outb(0xbb, cfg_base);
659
660	IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__);
661
662	return dongle_id;
663}
664
665/*
666 * Function ali_ircc_interrupt (irq, dev_id, regs)
667 *
668 *    An interrupt from the chip has arrived. Time to do some work
669 *
670 */
671static irqreturn_t ali_ircc_interrupt(int irq, void *dev_id)
672{
673	struct net_device *dev = dev_id;
674	struct ali_ircc_cb *self;
675	int ret;
676
677	IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
678
679	self = netdev_priv(dev);
680
681	spin_lock(&self->lock);
682
683	/* Dispatch interrupt handler for the current speed */
684	if (self->io.speed > 115200)
685		ret = ali_ircc_fir_interrupt(self);
686	else
687		ret = ali_ircc_sir_interrupt(self);
688
689	spin_unlock(&self->lock);
690
691	IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__);
692	return ret;
693}
694/*
695 * Function ali_ircc_fir_interrupt(irq, struct ali_ircc_cb *self)
696 *
697 *    Handle MIR/FIR interrupt
698 *
699 */
700static irqreturn_t ali_ircc_fir_interrupt(struct ali_ircc_cb *self)
701{
702	__u8 eir, OldMessageCount;
703	int iobase, tmp;
704
705	IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__);
706
707	iobase = self->io.fir_base;
708
709	switch_bank(iobase, BANK0);
710	self->InterruptID = inb(iobase+FIR_IIR);
711	self->BusStatus = inb(iobase+FIR_BSR);
712
713	OldMessageCount = (self->LineStatus + 1) & 0x07;
714	self->LineStatus = inb(iobase+FIR_LSR);
715	//self->ier = inb(iobase+FIR_IER); 		2000/12/1 04:32PM
716	eir = self->InterruptID & self->ier; /* Mask out the interesting ones */
717
718	IRDA_DEBUG(1, "%s(), self->InterruptID = %x\n", __func__,self->InterruptID);
719	IRDA_DEBUG(1, "%s(), self->LineStatus = %x\n", __func__,self->LineStatus);
720	IRDA_DEBUG(1, "%s(), self->ier = %x\n", __func__,self->ier);
721	IRDA_DEBUG(1, "%s(), eir = %x\n", __func__,eir);
722
723	/* Disable interrupts */
724	 SetCOMInterrupts(self, FALSE);
725
726	/* Tx or Rx Interrupt */
727
728	if (eir & IIR_EOM)
729	{
730		if (self->io.direction == IO_XMIT) /* TX */
731		{
732			IRDA_DEBUG(1, "%s(), ******* IIR_EOM (Tx) *******\n", __func__);
733
734			if(ali_ircc_dma_xmit_complete(self))
735			{
736				if (irda_device_txqueue_empty(self->netdev))
737				{
738					/* Prepare for receive */
739					ali_ircc_dma_receive(self);
740					self->ier = IER_EOM;
741				}
742			}
743			else
744			{
745				self->ier = IER_EOM;
746			}
747
748		}
749		else /* RX */
750		{
751			IRDA_DEBUG(1, "%s(), ******* IIR_EOM (Rx) *******\n", __func__);
752
753			if(OldMessageCount > ((self->LineStatus+1) & 0x07))
754			{
755				self->rcvFramesOverflow = TRUE;
756				IRDA_DEBUG(1, "%s(), ******* self->rcvFramesOverflow = TRUE ********\n", __func__);
757			}
758
759			if (ali_ircc_dma_receive_complete(self))
760			{
761				IRDA_DEBUG(1, "%s(), ******* receive complete ********\n", __func__);
762
763				self->ier = IER_EOM;
764			}
765			else
766			{
767				IRDA_DEBUG(1, "%s(), ******* Not receive complete ********\n", __func__);
768
769				self->ier = IER_EOM | IER_TIMER;
770			}
771
772		}
773	}
774	/* Timer Interrupt */
775	else if (eir & IIR_TIMER)
776	{
777		if(OldMessageCount > ((self->LineStatus+1) & 0x07))
778		{
779			self->rcvFramesOverflow = TRUE;
780			IRDA_DEBUG(1, "%s(), ******* self->rcvFramesOverflow = TRUE *******\n", __func__);
781		}
782		/* Disable Timer */
783		switch_bank(iobase, BANK1);
784		tmp = inb(iobase+FIR_CR);
785		outb( tmp& ~CR_TIMER_EN, iobase+FIR_CR);
786
787		/* Check if this is a Tx timer interrupt */
788		if (self->io.direction == IO_XMIT)
789		{
790			ali_ircc_dma_xmit(self);
791
792			/* Interrupt on EOM */
793			self->ier = IER_EOM;
794
795		}
796		else /* Rx */
797		{
798			if(ali_ircc_dma_receive_complete(self))
799			{
800				self->ier = IER_EOM;
801			}
802			else
803			{
804				self->ier = IER_EOM | IER_TIMER;
805			}
806		}
807	}
808
809	/* Restore Interrupt */
810	SetCOMInterrupts(self, TRUE);
811
812	IRDA_DEBUG(1, "%s(), ----------------- End ---------------\n", __func__);
813	return IRQ_RETVAL(eir);
814}
815
816/*
817 * Function ali_ircc_sir_interrupt (irq, self, eir)
818 *
819 *    Handle SIR interrupt
820 *
821 */
822static irqreturn_t ali_ircc_sir_interrupt(struct ali_ircc_cb *self)
823{
824	int iobase;
825	int iir, lsr;
826
827	IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
828
829	iobase = self->io.sir_base;
830
831	iir = inb(iobase+UART_IIR) & UART_IIR_ID;
832	if (iir) {
833		/* Clear interrupt */
834		lsr = inb(iobase+UART_LSR);
835
836		IRDA_DEBUG(4, "%s(), iir=%02x, lsr=%02x, iobase=%#x\n", __func__,
837			   iir, lsr, iobase);
838
839		switch (iir)
840		{
841			case UART_IIR_RLSI:
842				IRDA_DEBUG(2, "%s(), RLSI\n", __func__);
843				break;
844			case UART_IIR_RDI:
845				/* Receive interrupt */
846				ali_ircc_sir_receive(self);
847				break;
848			case UART_IIR_THRI:
849				if (lsr & UART_LSR_THRE)
850				{
851					/* Transmitter ready for data */
852					ali_ircc_sir_write_wakeup(self);
853				}
854				break;
855			default:
856				IRDA_DEBUG(0, "%s(), unhandled IIR=%#x\n", __func__, iir);
857				break;
858		}
859
860	}
861
862
863	IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__);
864
865	return IRQ_RETVAL(iir);
866}
867
868
869/*
870 * Function ali_ircc_sir_receive (self)
871 *
872 *    Receive one frame from the infrared port
873 *
874 */
875static void ali_ircc_sir_receive(struct ali_ircc_cb *self)
876{
877	int boguscount = 0;
878	int iobase;
879
880	IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
881	IRDA_ASSERT(self != NULL, return;);
882
883	iobase = self->io.sir_base;
884
885	/*
886	 * Receive all characters in Rx FIFO, unwrap and unstuff them.
887         * async_unwrap_char will deliver all found frames
888	 */
889	do {
890		async_unwrap_char(self->netdev, &self->netdev->stats, &self->rx_buff,
891				  inb(iobase+UART_RX));
892
893		/* Make sure we don't stay here too long */
894		if (boguscount++ > 32) {
895			IRDA_DEBUG(2,"%s(), breaking!\n", __func__);
896			break;
897		}
898	} while (inb(iobase+UART_LSR) & UART_LSR_DR);
899
900	IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
901}
902
903/*
904 * Function ali_ircc_sir_write_wakeup (tty)
905 *
906 *    Called by the driver when there's room for more data.  If we have
907 *    more packets to send, we send them here.
908 *
909 */
910static void ali_ircc_sir_write_wakeup(struct ali_ircc_cb *self)
911{
912	int actual = 0;
913	int iobase;
914
915	IRDA_ASSERT(self != NULL, return;);
916
917	IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__ );
918
919	iobase = self->io.sir_base;
920
921	/* Finished with frame?  */
922	if (self->tx_buff.len > 0)
923	{
924		/* Write data left in transmit buffer */
925		actual = ali_ircc_sir_write(iobase, self->io.fifo_size,
926				      self->tx_buff.data, self->tx_buff.len);
927		self->tx_buff.data += actual;
928		self->tx_buff.len  -= actual;
929	}
930	else
931	{
932		if (self->new_speed)
933		{
934			/* We must wait until all data are gone */
935			while(!(inb(iobase+UART_LSR) & UART_LSR_TEMT))
936				IRDA_DEBUG(1, "%s(), UART_LSR_THRE\n", __func__ );
937
938			IRDA_DEBUG(1, "%s(), Changing speed! self->new_speed = %d\n", __func__ , self->new_speed);
939			ali_ircc_change_speed(self, self->new_speed);
940			self->new_speed = 0;
941
942			// benjamin 2000/11/10 06:32PM
943			if (self->io.speed > 115200)
944			{
945				IRDA_DEBUG(2, "%s(), ali_ircc_change_speed from UART_LSR_TEMT\n", __func__ );
946
947				self->ier = IER_EOM;
948				// SetCOMInterrupts(self, TRUE);
949				return;
950			}
951		}
952		else
953		{
954			netif_wake_queue(self->netdev);
955		}
956
957		self->netdev->stats.tx_packets++;
958
959		/* Turn on receive interrupts */
960		outb(UART_IER_RDI, iobase+UART_IER);
961	}
962
963	IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
964}
965
966static void ali_ircc_change_speed(struct ali_ircc_cb *self, __u32 baud)
967{
968	struct net_device *dev = self->netdev;
969	int iobase;
970
971	IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__ );
972
973	IRDA_DEBUG(2, "%s(), setting speed = %d\n", __func__ , baud);
974
975	/* This function *must* be called with irq off and spin-lock.
976	 * - Jean II */
977
978	iobase = self->io.fir_base;
979
980	SetCOMInterrupts(self, FALSE); // 2000/11/24 11:43AM
981
982	/* Go to MIR, FIR Speed */
983	if (baud > 115200)
984	{
985
986
987		ali_ircc_fir_change_speed(self, baud);
988
989		/* Install FIR xmit handler*/
990		dev->netdev_ops = &ali_ircc_fir_ops;
991
992		/* Enable Interuupt */
993		self->ier = IER_EOM; // benjamin 2000/11/20 07:24PM
994
995		/* Be ready for incomming frames */
996		ali_ircc_dma_receive(self);	// benajmin 2000/11/8 07:46PM not complete
997	}
998	/* Go to SIR Speed */
999	else
1000	{
1001		ali_ircc_sir_change_speed(self, baud);
1002
1003		/* Install SIR xmit handler*/
1004		dev->netdev_ops = &ali_ircc_sir_ops;
1005	}
1006
1007
1008	SetCOMInterrupts(self, TRUE);	// 2000/11/24 11:43AM
1009
1010	netif_wake_queue(self->netdev);
1011
1012	IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
1013}
1014
1015static void ali_ircc_fir_change_speed(struct ali_ircc_cb *priv, __u32 baud)
1016{
1017
1018	int iobase;
1019	struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
1020	struct net_device *dev;
1021
1022	IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__ );
1023
1024	IRDA_ASSERT(self != NULL, return;);
1025
1026	dev = self->netdev;
1027	iobase = self->io.fir_base;
1028
1029	IRDA_DEBUG(1, "%s(), self->io.speed = %d, change to speed = %d\n", __func__ ,self->io.speed,baud);
1030
1031	/* Come from SIR speed */
1032	if(self->io.speed <=115200)
1033	{
1034		SIR2FIR(iobase);
1035	}
1036
1037	/* Update accounting for new speed */
1038	self->io.speed = baud;
1039
1040	// Set Dongle Speed mode
1041	ali_ircc_change_dongle_speed(self, baud);
1042
1043	IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1044}
1045
1046/*
1047 * Function ali_sir_change_speed (self, speed)
1048 *
1049 *    Set speed of IrDA port to specified baudrate
1050 *
1051 */
1052static void ali_ircc_sir_change_speed(struct ali_ircc_cb *priv, __u32 speed)
1053{
1054	struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
1055	unsigned long flags;
1056	int iobase;
1057	int fcr;    /* FIFO control reg */
1058	int lcr;    /* Line control reg */
1059	int divisor;
1060
1061	IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__ );
1062
1063	IRDA_DEBUG(1, "%s(), Setting speed to: %d\n", __func__ , speed);
1064
1065	IRDA_ASSERT(self != NULL, return;);
1066
1067	iobase = self->io.sir_base;
1068
1069	/* Come from MIR or FIR speed */
1070	if(self->io.speed >115200)
1071	{
1072		// Set Dongle Speed mode first
1073		ali_ircc_change_dongle_speed(self, speed);
1074
1075		FIR2SIR(iobase);
1076	}
1077
1078	// Clear Line and Auxiluary status registers 2000/11/24 11:47AM
1079
1080	inb(iobase+UART_LSR);
1081	inb(iobase+UART_SCR);
1082
1083	/* Update accounting for new speed */
1084	self->io.speed = speed;
1085
1086	spin_lock_irqsave(&self->lock, flags);
1087
1088	divisor = 115200/speed;
1089
1090	fcr = UART_FCR_ENABLE_FIFO;
1091
1092	/*
1093	 * Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and
1094	 * almost 1,7 ms at 19200 bps. At speeds above that we can just forget
1095	 * about this timeout since it will always be fast enough.
1096	 */
1097	if (self->io.speed < 38400)
1098		fcr |= UART_FCR_TRIGGER_1;
1099	else
1100		fcr |= UART_FCR_TRIGGER_14;
1101
1102	/* IrDA ports use 8N1 */
1103	lcr = UART_LCR_WLEN8;
1104
1105	outb(UART_LCR_DLAB | lcr, iobase+UART_LCR); /* Set DLAB */
1106	outb(divisor & 0xff,      iobase+UART_DLL); /* Set speed */
1107	outb(divisor >> 8,	  iobase+UART_DLM);
1108	outb(lcr,		  iobase+UART_LCR); /* Set 8N1	*/
1109	outb(fcr,		  iobase+UART_FCR); /* Enable FIFO's */
1110
1111	/* without this, the conection will be broken after come back from FIR speed,
1112	   but with this, the SIR connection is harder to established */
1113	outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase+UART_MCR);
1114
1115	spin_unlock_irqrestore(&self->lock, flags);
1116
1117	IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1118}
1119
1120static void ali_ircc_change_dongle_speed(struct ali_ircc_cb *priv, int speed)
1121{
1122
1123	struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
1124	int iobase,dongle_id;
1125	int tmp = 0;
1126
1127	IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__ );
1128
1129	iobase = self->io.fir_base; 	/* or iobase = self->io.sir_base; */
1130	dongle_id = self->io.dongle_id;
1131
1132	/* We are already locked, no need to do it again */
1133
1134	IRDA_DEBUG(1, "%s(), Set Speed for %s , Speed = %d\n", __func__ , dongle_types[dongle_id], speed);
1135
1136	switch_bank(iobase, BANK2);
1137	tmp = inb(iobase+FIR_IRDA_CR);
1138
1139	/* IBM type dongle */
1140	if(dongle_id == 0)
1141	{
1142		if(speed == 4000000)
1143		{
1144			//	      __ __
1145			// SD/MODE __|     |__ __
1146			//               __ __
1147			// IRTX    __ __|     |__
1148			//         T1 T2 T3 T4 T5
1149
1150			tmp &=  ~IRDA_CR_HDLC;		// HDLC=0
1151			tmp |= IRDA_CR_CRC;	   	// CRC=1
1152
1153			switch_bank(iobase, BANK2);
1154			outb(tmp, iobase+FIR_IRDA_CR);
1155
1156      			// T1 -> SD/MODE:0 IRTX:0
1157      			tmp &= ~0x09;
1158      			tmp |= 0x02;
1159      			outb(tmp, iobase+FIR_IRDA_CR);
1160      			udelay(2);
1161
1162      			// T2 -> SD/MODE:1 IRTX:0
1163      			tmp &= ~0x01;
1164      			tmp |= 0x0a;
1165      			outb(tmp, iobase+FIR_IRDA_CR);
1166      			udelay(2);
1167
1168      			// T3 -> SD/MODE:1 IRTX:1
1169      			tmp |= 0x0b;
1170      			outb(tmp, iobase+FIR_IRDA_CR);
1171      			udelay(2);
1172
1173      			// T4 -> SD/MODE:0 IRTX:1
1174      			tmp &= ~0x08;
1175      			tmp |= 0x03;
1176      			outb(tmp, iobase+FIR_IRDA_CR);
1177      			udelay(2);
1178
1179      			// T5 -> SD/MODE:0 IRTX:0
1180      			tmp &= ~0x09;
1181      			tmp |= 0x02;
1182      			outb(tmp, iobase+FIR_IRDA_CR);
1183      			udelay(2);
1184
1185      			// reset -> Normal TX output Signal
1186      			outb(tmp & ~0x02, iobase+FIR_IRDA_CR);
1187		}
1188		else /* speed <=1152000 */
1189		{
1190			//	      __
1191			// SD/MODE __|  |__
1192			//
1193			// IRTX    ________
1194			//         T1 T2 T3
1195
1196			/* MIR 115200, 57600 */
1197			if (speed==1152000)
1198			{
1199				tmp |= 0xA0;	   //HDLC=1, 1.152Mbps=1
1200      			}
1201      			else
1202      			{
1203				tmp &=~0x80;	   //HDLC 0.576Mbps
1204				tmp |= 0x20;	   //HDLC=1,
1205      			}
1206
1207      			tmp |= IRDA_CR_CRC;	   	// CRC=1
1208
1209      			switch_bank(iobase, BANK2);
1210      			outb(tmp, iobase+FIR_IRDA_CR);
1211
1212			/* MIR 115200, 57600 */
1213
1214			//switch_bank(iobase, BANK2);
1215			// T1 -> SD/MODE:0 IRTX:0
1216      			tmp &= ~0x09;
1217      			tmp |= 0x02;
1218      			outb(tmp, iobase+FIR_IRDA_CR);
1219      			udelay(2);
1220
1221      			// T2 -> SD/MODE:1 IRTX:0
1222      			tmp &= ~0x01;
1223      			tmp |= 0x0a;
1224      			outb(tmp, iobase+FIR_IRDA_CR);
1225
1226      			// T3 -> SD/MODE:0 IRTX:0
1227      			tmp &= ~0x09;
1228      			tmp |= 0x02;
1229      			outb(tmp, iobase+FIR_IRDA_CR);
1230      			udelay(2);
1231
1232      			// reset -> Normal TX output Signal
1233      			outb(tmp & ~0x02, iobase+FIR_IRDA_CR);
1234		}
1235	}
1236	else if (dongle_id == 1) /* HP HDSL-3600 */
1237	{
1238		switch(speed)
1239		{
1240		case 4000000:
1241			tmp &=  ~IRDA_CR_HDLC;	// HDLC=0
1242			break;
1243
1244		case 1152000:
1245			tmp |= 0xA0;	   	// HDLC=1, 1.152Mbps=1
1246      			break;
1247
1248      		case 576000:
1249      			tmp &=~0x80;	   	// HDLC 0.576Mbps
1250			tmp |= 0x20;	   	// HDLC=1,
1251			break;
1252      		}
1253
1254		tmp |= IRDA_CR_CRC;	   	// CRC=1
1255
1256		switch_bank(iobase, BANK2);
1257      		outb(tmp, iobase+FIR_IRDA_CR);
1258	}
1259	else /* HP HDSL-1100 */
1260	{
1261		if(speed <= 115200) /* SIR */
1262		{
1263
1264			tmp &= ~IRDA_CR_FIR_SIN;	// HP sin select = 0
1265
1266			switch_bank(iobase, BANK2);
1267      			outb(tmp, iobase+FIR_IRDA_CR);
1268		}
1269		else /* MIR FIR */
1270		{
1271
1272			switch(speed)
1273			{
1274			case 4000000:
1275				tmp &=  ~IRDA_CR_HDLC;	// HDLC=0
1276				break;
1277
1278			case 1152000:
1279				tmp |= 0xA0;	   	// HDLC=1, 1.152Mbps=1
1280      				break;
1281
1282      			case 576000:
1283      				tmp &=~0x80;	   	// HDLC 0.576Mbps
1284				tmp |= 0x20;	   	// HDLC=1,
1285				break;
1286      			}
1287
1288			tmp |= IRDA_CR_CRC;	   	// CRC=1
1289			tmp |= IRDA_CR_FIR_SIN;		// HP sin select = 1
1290
1291			switch_bank(iobase, BANK2);
1292      			outb(tmp, iobase+FIR_IRDA_CR);
1293		}
1294	}
1295
1296	switch_bank(iobase, BANK0);
1297
1298	IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1299}
1300
1301/*
1302 * Function ali_ircc_sir_write (driver)
1303 *
1304 *    Fill Tx FIFO with transmit data
1305 *
1306 */
1307static int ali_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len)
1308{
1309	int actual = 0;
1310
1311	IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__ );
1312
1313	/* Tx FIFO should be empty! */
1314	if (!(inb(iobase+UART_LSR) & UART_LSR_THRE)) {
1315		IRDA_DEBUG(0, "%s(), failed, fifo not empty!\n", __func__ );
1316		return 0;
1317	}
1318
1319	/* Fill FIFO with current frame */
1320	while ((fifo_size-- > 0) && (actual < len)) {
1321		/* Transmit next byte */
1322		outb(buf[actual], iobase+UART_TX);
1323
1324		actual++;
1325	}
1326
1327        IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
1328	return actual;
1329}
1330
1331/*
1332 * Function ali_ircc_net_open (dev)
1333 *
1334 *    Start the device
1335 *
1336 */
1337static int ali_ircc_net_open(struct net_device *dev)
1338{
1339	struct ali_ircc_cb *self;
1340	int iobase;
1341	char hwname[32];
1342
1343	IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__ );
1344
1345	IRDA_ASSERT(dev != NULL, return -1;);
1346
1347	self = netdev_priv(dev);
1348
1349	IRDA_ASSERT(self != NULL, return 0;);
1350
1351	iobase = self->io.fir_base;
1352
1353	/* Request IRQ and install Interrupt Handler */
1354	if (request_irq(self->io.irq, ali_ircc_interrupt, 0, dev->name, dev))
1355	{
1356		IRDA_WARNING("%s, unable to allocate irq=%d\n",
1357			     ALI_IRCC_DRIVER_NAME,
1358			     self->io.irq);
1359		return -EAGAIN;
1360	}
1361
1362	/*
1363	 * Always allocate the DMA channel after the IRQ, and clean up on
1364	 * failure.
1365	 */
1366	if (request_dma(self->io.dma, dev->name)) {
1367		IRDA_WARNING("%s, unable to allocate dma=%d\n",
1368			     ALI_IRCC_DRIVER_NAME,
1369			     self->io.dma);
1370		free_irq(self->io.irq, self);
1371		return -EAGAIN;
1372	}
1373
1374	/* Turn on interrups */
1375	outb(UART_IER_RDI , iobase+UART_IER);
1376
1377	/* Ready to play! */
1378	netif_start_queue(dev); //benjamin by irport
1379
1380	/* Give self a hardware name */
1381	sprintf(hwname, "ALI-FIR @ 0x%03x", self->io.fir_base);
1382
1383	/*
1384	 * Open new IrLAP layer instance, now that everything should be
1385	 * initialized properly
1386	 */
1387	self->irlap = irlap_open(dev, &self->qos, hwname);
1388
1389	IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
1390
1391	return 0;
1392}
1393
1394/*
1395 * Function ali_ircc_net_close (dev)
1396 *
1397 *    Stop the device
1398 *
1399 */
1400static int ali_ircc_net_close(struct net_device *dev)
1401{
1402
1403	struct ali_ircc_cb *self;
1404	//int iobase;
1405
1406	IRDA_DEBUG(4, "%s(), ---------------- Start ----------------\n", __func__ );
1407
1408	IRDA_ASSERT(dev != NULL, return -1;);
1409
1410	self = netdev_priv(dev);
1411	IRDA_ASSERT(self != NULL, return 0;);
1412
1413	/* Stop device */
1414	netif_stop_queue(dev);
1415
1416	/* Stop and remove instance of IrLAP */
1417	if (self->irlap)
1418		irlap_close(self->irlap);
1419	self->irlap = NULL;
1420
1421	disable_dma(self->io.dma);
1422
1423	/* Disable interrupts */
1424	SetCOMInterrupts(self, FALSE);
1425
1426	free_irq(self->io.irq, dev);
1427	free_dma(self->io.dma);
1428
1429	IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
1430
1431	return 0;
1432}
1433
1434/*
1435 * Function ali_ircc_fir_hard_xmit (skb, dev)
1436 *
1437 *    Transmit the frame
1438 *
1439 */
1440static netdev_tx_t ali_ircc_fir_hard_xmit(struct sk_buff *skb,
1441						struct net_device *dev)
1442{
1443	struct ali_ircc_cb *self;
1444	unsigned long flags;
1445	int iobase;
1446	__u32 speed;
1447	int mtt, diff;
1448
1449	IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __func__ );
1450
1451	self = netdev_priv(dev);
1452	iobase = self->io.fir_base;
1453
1454	netif_stop_queue(dev);
1455
1456	/* Make sure tests *& speed change are atomic */
1457	spin_lock_irqsave(&self->lock, flags);
1458
1459	/* Note : you should make sure that speed changes are not going
1460	 * to corrupt any outgoing frame. Look at nsc-ircc for the gory
1461	 * details - Jean II */
1462
1463	/* Check if we need to change the speed */
1464	speed = irda_get_next_speed(skb);
1465	if ((speed != self->io.speed) && (speed != -1)) {
1466		/* Check for empty frame */
1467		if (!skb->len) {
1468			ali_ircc_change_speed(self, speed);
1469			dev->trans_start = jiffies;
1470			spin_unlock_irqrestore(&self->lock, flags);
1471			dev_kfree_skb(skb);
1472			return NETDEV_TX_OK;
1473		} else
1474			self->new_speed = speed;
1475	}
1476
1477	/* Register and copy this frame to DMA memory */
1478	self->tx_fifo.queue[self->tx_fifo.free].start = self->tx_fifo.tail;
1479	self->tx_fifo.queue[self->tx_fifo.free].len = skb->len;
1480	self->tx_fifo.tail += skb->len;
1481
1482	dev->stats.tx_bytes += skb->len;
1483
1484	skb_copy_from_linear_data(skb, self->tx_fifo.queue[self->tx_fifo.free].start,
1485		      skb->len);
1486	self->tx_fifo.len++;
1487	self->tx_fifo.free++;
1488
1489	/* Start transmit only if there is currently no transmit going on */
1490	if (self->tx_fifo.len == 1)
1491	{
1492		/* Check if we must wait the min turn time or not */
1493		mtt = irda_get_mtt(skb);
1494
1495		if (mtt)
1496		{
1497			/* Check how much time we have used already */
1498			do_gettimeofday(&self->now);
1499
1500			diff = self->now.tv_usec - self->stamp.tv_usec;
1501			/* self->stamp is set from ali_ircc_dma_receive_complete() */
1502
1503			IRDA_DEBUG(1, "%s(), ******* diff = %d *******\n", __func__ , diff);
1504
1505			if (diff < 0)
1506				diff += 1000000;
1507
1508			/* Check if the mtt is larger than the time we have
1509			 * already used by all the protocol processing
1510			 */
1511			if (mtt > diff)
1512			{
1513				mtt -= diff;
1514
1515				/*
1516				 * Use timer if delay larger than 1000 us, and
1517				 * use udelay for smaller values which should
1518				 * be acceptable
1519				 */
1520				if (mtt > 500)
1521				{
1522					/* Adjust for timer resolution */
1523					mtt = (mtt+250) / 500; 	/* 4 discard, 5 get advanced, Let's round off */
1524
1525					IRDA_DEBUG(1, "%s(), ************** mtt = %d ***********\n", __func__ , mtt);
1526
1527					/* Setup timer */
1528					if (mtt == 1) /* 500 us */
1529					{
1530						switch_bank(iobase, BANK1);
1531						outb(TIMER_IIR_500, iobase+FIR_TIMER_IIR);
1532					}
1533					else if (mtt == 2) /* 1 ms */
1534					{
1535						switch_bank(iobase, BANK1);
1536						outb(TIMER_IIR_1ms, iobase+FIR_TIMER_IIR);
1537					}
1538					else /* > 2ms -> 4ms */
1539					{
1540						switch_bank(iobase, BANK1);
1541						outb(TIMER_IIR_2ms, iobase+FIR_TIMER_IIR);
1542					}
1543
1544
1545					/* Start timer */
1546					outb(inb(iobase+FIR_CR) | CR_TIMER_EN, iobase+FIR_CR);
1547					self->io.direction = IO_XMIT;
1548
1549					/* Enable timer interrupt */
1550					self->ier = IER_TIMER;
1551					SetCOMInterrupts(self, TRUE);
1552
1553					/* Timer will take care of the rest */
1554					goto out;
1555				}
1556				else
1557					udelay(mtt);
1558			} // if (if (mtt > diff)
1559		}// if (mtt)
1560
1561		/* Enable EOM interrupt */
1562		self->ier = IER_EOM;
1563		SetCOMInterrupts(self, TRUE);
1564
1565		/* Transmit frame */
1566		ali_ircc_dma_xmit(self);
1567	} // if (self->tx_fifo.len == 1)
1568
1569 out:
1570
1571	/* Not busy transmitting anymore if window is not full */
1572	if (self->tx_fifo.free < MAX_TX_WINDOW)
1573		netif_wake_queue(self->netdev);
1574
1575	/* Restore bank register */
1576	switch_bank(iobase, BANK0);
1577
1578	dev->trans_start = jiffies;
1579	spin_unlock_irqrestore(&self->lock, flags);
1580	dev_kfree_skb(skb);
1581
1582	IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1583	return NETDEV_TX_OK;
1584}
1585
1586
1587static void ali_ircc_dma_xmit(struct ali_ircc_cb *self)
1588{
1589	int iobase, tmp;
1590	unsigned char FIFO_OPTI, Hi, Lo;
1591
1592
1593	IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __func__ );
1594
1595	iobase = self->io.fir_base;
1596
1597	/* FIFO threshold , this method comes from NDIS5 code */
1598
1599	if(self->tx_fifo.queue[self->tx_fifo.ptr].len < TX_FIFO_Threshold)
1600		FIFO_OPTI = self->tx_fifo.queue[self->tx_fifo.ptr].len-1;
1601	else
1602		FIFO_OPTI = TX_FIFO_Threshold;
1603
1604	/* Disable DMA */
1605	switch_bank(iobase, BANK1);
1606	outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1607
1608	self->io.direction = IO_XMIT;
1609
1610	irda_setup_dma(self->io.dma,
1611		       ((u8 *)self->tx_fifo.queue[self->tx_fifo.ptr].start -
1612			self->tx_buff.head) + self->tx_buff_dma,
1613		       self->tx_fifo.queue[self->tx_fifo.ptr].len,
1614		       DMA_TX_MODE);
1615
1616	/* Reset Tx FIFO */
1617	switch_bank(iobase, BANK0);
1618	outb(LCR_A_FIFO_RESET, iobase+FIR_LCR_A);
1619
1620	/* Set Tx FIFO threshold */
1621	if (self->fifo_opti_buf!=FIFO_OPTI)
1622	{
1623		switch_bank(iobase, BANK1);
1624	    	outb(FIFO_OPTI, iobase+FIR_FIFO_TR) ;
1625	    	self->fifo_opti_buf=FIFO_OPTI;
1626	}
1627
1628	/* Set Tx DMA threshold */
1629	switch_bank(iobase, BANK1);
1630	outb(TX_DMA_Threshold, iobase+FIR_DMA_TR);
1631
1632	/* Set max Tx frame size */
1633	Hi = (self->tx_fifo.queue[self->tx_fifo.ptr].len >> 8) & 0x0f;
1634	Lo = self->tx_fifo.queue[self->tx_fifo.ptr].len & 0xff;
1635	switch_bank(iobase, BANK2);
1636	outb(Hi, iobase+FIR_TX_DSR_HI);
1637	outb(Lo, iobase+FIR_TX_DSR_LO);
1638
1639	/* Disable SIP , Disable Brick Wall (we don't support in TX mode), Change to TX mode */
1640	switch_bank(iobase, BANK0);
1641	tmp = inb(iobase+FIR_LCR_B);
1642	tmp &= ~0x20; // Disable SIP
1643	outb(((unsigned char)(tmp & 0x3f) | LCR_B_TX_MODE) & ~LCR_B_BW, iobase+FIR_LCR_B);
1644	IRDA_DEBUG(1, "%s(), *** Change to TX mode: FIR_LCR_B = 0x%x ***\n", __func__ , inb(iobase+FIR_LCR_B));
1645
1646	outb(0, iobase+FIR_LSR);
1647
1648	/* Enable DMA and Burst Mode */
1649	switch_bank(iobase, BANK1);
1650	outb(inb(iobase+FIR_CR) | CR_DMA_EN | CR_DMA_BURST, iobase+FIR_CR);
1651
1652	switch_bank(iobase, BANK0);
1653
1654	IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1655}
1656
1657static int  ali_ircc_dma_xmit_complete(struct ali_ircc_cb *self)
1658{
1659	int iobase;
1660	int ret = TRUE;
1661
1662	IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __func__ );
1663
1664	iobase = self->io.fir_base;
1665
1666	/* Disable DMA */
1667	switch_bank(iobase, BANK1);
1668	outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1669
1670	/* Check for underrun! */
1671	switch_bank(iobase, BANK0);
1672	if((inb(iobase+FIR_LSR) & LSR_FRAME_ABORT) == LSR_FRAME_ABORT)
1673
1674	{
1675		IRDA_ERROR("%s(), ********* LSR_FRAME_ABORT *********\n", __func__);
1676		self->netdev->stats.tx_errors++;
1677		self->netdev->stats.tx_fifo_errors++;
1678	}
1679	else
1680	{
1681		self->netdev->stats.tx_packets++;
1682	}
1683
1684	/* Check if we need to change the speed */
1685	if (self->new_speed)
1686	{
1687		ali_ircc_change_speed(self, self->new_speed);
1688		self->new_speed = 0;
1689	}
1690
1691	/* Finished with this frame, so prepare for next */
1692	self->tx_fifo.ptr++;
1693	self->tx_fifo.len--;
1694
1695	/* Any frames to be sent back-to-back? */
1696	if (self->tx_fifo.len)
1697	{
1698		ali_ircc_dma_xmit(self);
1699
1700		/* Not finished yet! */
1701		ret = FALSE;
1702	}
1703	else
1704	{	/* Reset Tx FIFO info */
1705		self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1706		self->tx_fifo.tail = self->tx_buff.head;
1707	}
1708
1709	/* Make sure we have room for more frames */
1710	if (self->tx_fifo.free < MAX_TX_WINDOW) {
1711		/* Not busy transmitting anymore */
1712		/* Tell the network layer, that we can accept more frames */
1713		netif_wake_queue(self->netdev);
1714	}
1715
1716	switch_bank(iobase, BANK0);
1717
1718	IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1719	return ret;
1720}
1721
1722/*
1723 * Function ali_ircc_dma_receive (self)
1724 *
1725 *    Get ready for receiving a frame. The device will initiate a DMA
1726 *    if it starts to receive a frame.
1727 *
1728 */
1729static int ali_ircc_dma_receive(struct ali_ircc_cb *self)
1730{
1731	int iobase, tmp;
1732
1733	IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __func__ );
1734
1735	iobase = self->io.fir_base;
1736
1737	/* Reset Tx FIFO info */
1738	self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1739	self->tx_fifo.tail = self->tx_buff.head;
1740
1741	/* Disable DMA */
1742	switch_bank(iobase, BANK1);
1743	outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1744
1745	/* Reset Message Count */
1746	switch_bank(iobase, BANK0);
1747	outb(0x07, iobase+FIR_LSR);
1748
1749	self->rcvFramesOverflow = FALSE;
1750
1751	self->LineStatus = inb(iobase+FIR_LSR) ;
1752
1753	/* Reset Rx FIFO info */
1754	self->io.direction = IO_RECV;
1755	self->rx_buff.data = self->rx_buff.head;
1756
1757	/* Reset Rx FIFO */
1758	// switch_bank(iobase, BANK0);
1759	outb(LCR_A_FIFO_RESET, iobase+FIR_LCR_A);
1760
1761	self->st_fifo.len = self->st_fifo.pending_bytes = 0;
1762	self->st_fifo.tail = self->st_fifo.head = 0;
1763
1764	irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize,
1765		       DMA_RX_MODE);
1766
1767	/* Set Receive Mode,Brick Wall */
1768	//switch_bank(iobase, BANK0);
1769	tmp = inb(iobase+FIR_LCR_B);
1770	outb((unsigned char)(tmp &0x3f) | LCR_B_RX_MODE | LCR_B_BW , iobase + FIR_LCR_B); // 2000/12/1 05:16PM
1771	IRDA_DEBUG(1, "%s(), *** Change To RX mode: FIR_LCR_B = 0x%x ***\n", __func__ , inb(iobase+FIR_LCR_B));
1772
1773	/* Set Rx Threshold */
1774	switch_bank(iobase, BANK1);
1775	outb(RX_FIFO_Threshold, iobase+FIR_FIFO_TR);
1776	outb(RX_DMA_Threshold, iobase+FIR_DMA_TR);
1777
1778	/* Enable DMA and Burst Mode */
1779	// switch_bank(iobase, BANK1);
1780	outb(CR_DMA_EN | CR_DMA_BURST, iobase+FIR_CR);
1781
1782	switch_bank(iobase, BANK0);
1783	IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1784	return 0;
1785}
1786
1787static int  ali_ircc_dma_receive_complete(struct ali_ircc_cb *self)
1788{
1789	struct st_fifo *st_fifo;
1790	struct sk_buff *skb;
1791	__u8 status, MessageCount;
1792	int len, i, iobase, val;
1793
1794	IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __func__ );
1795
1796	st_fifo = &self->st_fifo;
1797	iobase = self->io.fir_base;
1798
1799	switch_bank(iobase, BANK0);
1800	MessageCount = inb(iobase+ FIR_LSR)&0x07;
1801
1802	if (MessageCount > 0)
1803		IRDA_DEBUG(0, "%s(), Messsage count = %d,\n", __func__ , MessageCount);
1804
1805	for (i=0; i<=MessageCount; i++)
1806	{
1807		/* Bank 0 */
1808		switch_bank(iobase, BANK0);
1809		status = inb(iobase+FIR_LSR);
1810
1811		switch_bank(iobase, BANK2);
1812		len = inb(iobase+FIR_RX_DSR_HI) & 0x0f;
1813		len = len << 8;
1814		len |= inb(iobase+FIR_RX_DSR_LO);
1815
1816		IRDA_DEBUG(1, "%s(), RX Length = 0x%.2x,\n", __func__ , len);
1817		IRDA_DEBUG(1, "%s(), RX Status = 0x%.2x,\n", __func__ , status);
1818
1819		if (st_fifo->tail >= MAX_RX_WINDOW) {
1820			IRDA_DEBUG(0, "%s(), window is full!\n", __func__ );
1821			continue;
1822		}
1823
1824		st_fifo->entries[st_fifo->tail].status = status;
1825		st_fifo->entries[st_fifo->tail].len = len;
1826		st_fifo->pending_bytes += len;
1827		st_fifo->tail++;
1828		st_fifo->len++;
1829	}
1830
1831	for (i=0; i<=MessageCount; i++)
1832	{
1833		/* Get first entry */
1834		status = st_fifo->entries[st_fifo->head].status;
1835		len    = st_fifo->entries[st_fifo->head].len;
1836		st_fifo->pending_bytes -= len;
1837		st_fifo->head++;
1838		st_fifo->len--;
1839
1840		/* Check for errors */
1841		if ((status & 0xd8) || self->rcvFramesOverflow || (len==0))
1842		{
1843			IRDA_DEBUG(0,"%s(), ************* RX Errors ************\n", __func__ );
1844
1845			/* Skip frame */
1846			self->netdev->stats.rx_errors++;
1847
1848			self->rx_buff.data += len;
1849
1850			if (status & LSR_FIFO_UR)
1851			{
1852				self->netdev->stats.rx_frame_errors++;
1853				IRDA_DEBUG(0,"%s(), ************* FIFO Errors ************\n", __func__ );
1854			}
1855			if (status & LSR_FRAME_ERROR)
1856			{
1857				self->netdev->stats.rx_frame_errors++;
1858				IRDA_DEBUG(0,"%s(), ************* FRAME Errors ************\n", __func__ );
1859			}
1860
1861			if (status & LSR_CRC_ERROR)
1862			{
1863				self->netdev->stats.rx_crc_errors++;
1864				IRDA_DEBUG(0,"%s(), ************* CRC Errors ************\n", __func__ );
1865			}
1866
1867			if(self->rcvFramesOverflow)
1868			{
1869				self->netdev->stats.rx_frame_errors++;
1870				IRDA_DEBUG(0,"%s(), ************* Overran DMA buffer ************\n", __func__ );
1871			}
1872			if(len == 0)
1873			{
1874				self->netdev->stats.rx_frame_errors++;
1875				IRDA_DEBUG(0,"%s(), ********** Receive Frame Size = 0 *********\n", __func__ );
1876			}
1877		}
1878		else
1879		{
1880
1881			if (st_fifo->pending_bytes < 32)
1882			{
1883				switch_bank(iobase, BANK0);
1884				val = inb(iobase+FIR_BSR);
1885				if ((val& BSR_FIFO_NOT_EMPTY)== 0x80)
1886				{
1887					IRDA_DEBUG(0, "%s(), ************* BSR_FIFO_NOT_EMPTY ************\n", __func__ );
1888
1889					/* Put this entry back in fifo */
1890					st_fifo->head--;
1891					st_fifo->len++;
1892					st_fifo->pending_bytes += len;
1893					st_fifo->entries[st_fifo->head].status = status;
1894					st_fifo->entries[st_fifo->head].len = len;
1895
1896					/*
1897		 			* DMA not finished yet, so try again
1898		 			* later, set timer value, resolution
1899		 			* 500 us
1900		 			*/
1901
1902					switch_bank(iobase, BANK1);
1903					outb(TIMER_IIR_500, iobase+FIR_TIMER_IIR); // 2001/1/2 05:07PM
1904
1905					/* Enable Timer */
1906					outb(inb(iobase+FIR_CR) | CR_TIMER_EN, iobase+FIR_CR);
1907
1908					return FALSE; /* I'll be back! */
1909				}
1910			}
1911
1912			/*
1913			 * Remember the time we received this frame, so we can
1914			 * reduce the min turn time a bit since we will know
1915			 * how much time we have used for protocol processing
1916			 */
1917			do_gettimeofday(&self->stamp);
1918
1919			skb = dev_alloc_skb(len+1);
1920			if (skb == NULL)
1921			{
1922				IRDA_WARNING("%s(), memory squeeze, "
1923					     "dropping frame.\n",
1924					     __func__);
1925				self->netdev->stats.rx_dropped++;
1926
1927				return FALSE;
1928			}
1929
1930			/* Make sure IP header gets aligned */
1931			skb_reserve(skb, 1);
1932
1933			/* Copy frame without CRC, CRC is removed by hardware*/
1934			skb_put(skb, len);
1935			skb_copy_to_linear_data(skb, self->rx_buff.data, len);
1936
1937			/* Move to next frame */
1938			self->rx_buff.data += len;
1939			self->netdev->stats.rx_bytes += len;
1940			self->netdev->stats.rx_packets++;
1941
1942			skb->dev = self->netdev;
1943			skb_reset_mac_header(skb);
1944			skb->protocol = htons(ETH_P_IRDA);
1945			netif_rx(skb);
1946		}
1947	}
1948
1949	switch_bank(iobase, BANK0);
1950
1951	IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1952	return TRUE;
1953}
1954
1955
1956
1957/*
1958 * Function ali_ircc_sir_hard_xmit (skb, dev)
1959 *
1960 *    Transmit the frame!
1961 *
1962 */
1963static netdev_tx_t ali_ircc_sir_hard_xmit(struct sk_buff *skb,
1964						struct net_device *dev)
1965{
1966	struct ali_ircc_cb *self;
1967	unsigned long flags;
1968	int iobase;
1969	__u32 speed;
1970
1971	IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__ );
1972
1973	IRDA_ASSERT(dev != NULL, return NETDEV_TX_OK;);
1974
1975	self = netdev_priv(dev);
1976	IRDA_ASSERT(self != NULL, return NETDEV_TX_OK;);
1977
1978	iobase = self->io.sir_base;
1979
1980	netif_stop_queue(dev);
1981
1982	/* Make sure tests *& speed change are atomic */
1983	spin_lock_irqsave(&self->lock, flags);
1984
1985	/* Note : you should make sure that speed changes are not going
1986	 * to corrupt any outgoing frame. Look at nsc-ircc for the gory
1987	 * details - Jean II */
1988
1989	/* Check if we need to change the speed */
1990	speed = irda_get_next_speed(skb);
1991	if ((speed != self->io.speed) && (speed != -1)) {
1992		/* Check for empty frame */
1993		if (!skb->len) {
1994			ali_ircc_change_speed(self, speed);
1995			dev->trans_start = jiffies;
1996			spin_unlock_irqrestore(&self->lock, flags);
1997			dev_kfree_skb(skb);
1998			return NETDEV_TX_OK;
1999		} else
2000			self->new_speed = speed;
2001	}
2002
2003	/* Init tx buffer */
2004	self->tx_buff.data = self->tx_buff.head;
2005
2006        /* Copy skb to tx_buff while wrapping, stuffing and making CRC */
2007	self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data,
2008					   self->tx_buff.truesize);
2009
2010	self->netdev->stats.tx_bytes += self->tx_buff.len;
2011
2012	/* Turn on transmit finished interrupt. Will fire immediately!  */
2013	outb(UART_IER_THRI, iobase+UART_IER);
2014
2015	dev->trans_start = jiffies;
2016	spin_unlock_irqrestore(&self->lock, flags);
2017
2018	dev_kfree_skb(skb);
2019
2020	IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
2021
2022	return NETDEV_TX_OK;
2023}
2024
2025
2026/*
2027 * Function ali_ircc_net_ioctl (dev, rq, cmd)
2028 *
2029 *    Process IOCTL commands for this device
2030 *
2031 */
2032static int ali_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2033{
2034	struct if_irda_req *irq = (struct if_irda_req *) rq;
2035	struct ali_ircc_cb *self;
2036	unsigned long flags;
2037	int ret = 0;
2038
2039	IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__ );
2040
2041	IRDA_ASSERT(dev != NULL, return -1;);
2042
2043	self = netdev_priv(dev);
2044
2045	IRDA_ASSERT(self != NULL, return -1;);
2046
2047	IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __func__ , dev->name, cmd);
2048
2049	switch (cmd) {
2050	case SIOCSBANDWIDTH: /* Set bandwidth */
2051		IRDA_DEBUG(1, "%s(), SIOCSBANDWIDTH\n", __func__ );
2052		/*
2053		 * This function will also be used by IrLAP to change the
2054		 * speed, so we still must allow for speed change within
2055		 * interrupt context.
2056		 */
2057		if (!in_interrupt() && !capable(CAP_NET_ADMIN))
2058			return -EPERM;
2059
2060		spin_lock_irqsave(&self->lock, flags);
2061		ali_ircc_change_speed(self, irq->ifr_baudrate);
2062		spin_unlock_irqrestore(&self->lock, flags);
2063		break;
2064	case SIOCSMEDIABUSY: /* Set media busy */
2065		IRDA_DEBUG(1, "%s(), SIOCSMEDIABUSY\n", __func__ );
2066		if (!capable(CAP_NET_ADMIN))
2067			return -EPERM;
2068		irda_device_set_media_busy(self->netdev, TRUE);
2069		break;
2070	case SIOCGRECEIVING: /* Check if we are receiving right now */
2071		IRDA_DEBUG(2, "%s(), SIOCGRECEIVING\n", __func__ );
2072		/* This is protected */
2073		irq->ifr_receiving = ali_ircc_is_receiving(self);
2074		break;
2075	default:
2076		ret = -EOPNOTSUPP;
2077	}
2078
2079	IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
2080
2081	return ret;
2082}
2083
2084/*
2085 * Function ali_ircc_is_receiving (self)
2086 *
2087 *    Return TRUE is we are currently receiving a frame
2088 *
2089 */
2090static int ali_ircc_is_receiving(struct ali_ircc_cb *self)
2091{
2092	unsigned long flags;
2093	int status = FALSE;
2094	int iobase;
2095
2096	IRDA_DEBUG(2, "%s(), ---------------- Start -----------------\n", __func__ );
2097
2098	IRDA_ASSERT(self != NULL, return FALSE;);
2099
2100	spin_lock_irqsave(&self->lock, flags);
2101
2102	if (self->io.speed > 115200)
2103	{
2104		iobase = self->io.fir_base;
2105
2106		switch_bank(iobase, BANK1);
2107		if((inb(iobase+FIR_FIFO_FR) & 0x3f) != 0)
2108		{
2109			/* We are receiving something */
2110			IRDA_DEBUG(1, "%s(), We are receiving something\n", __func__ );
2111			status = TRUE;
2112		}
2113		switch_bank(iobase, BANK0);
2114	}
2115	else
2116	{
2117		status = (self->rx_buff.state != OUTSIDE_FRAME);
2118	}
2119
2120	spin_unlock_irqrestore(&self->lock, flags);
2121
2122	IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
2123
2124	return status;
2125}
2126
2127static int ali_ircc_suspend(struct platform_device *dev, pm_message_t state)
2128{
2129	struct ali_ircc_cb *self = platform_get_drvdata(dev);
2130
2131	IRDA_MESSAGE("%s, Suspending\n", ALI_IRCC_DRIVER_NAME);
2132
2133	if (self->io.suspended)
2134		return 0;
2135
2136	ali_ircc_net_close(self->netdev);
2137
2138	self->io.suspended = 1;
2139
2140	return 0;
2141}
2142
2143static int ali_ircc_resume(struct platform_device *dev)
2144{
2145	struct ali_ircc_cb *self = platform_get_drvdata(dev);
2146
2147	if (!self->io.suspended)
2148		return 0;
2149
2150	ali_ircc_net_open(self->netdev);
2151
2152	IRDA_MESSAGE("%s, Waking up\n", ALI_IRCC_DRIVER_NAME);
2153
2154	self->io.suspended = 0;
2155
2156	return 0;
2157}
2158
2159/* ALi Chip Function */
2160
2161static void SetCOMInterrupts(struct ali_ircc_cb *self , unsigned char enable)
2162{
2163
2164	unsigned char newMask;
2165
2166	int iobase = self->io.fir_base; /* or sir_base */
2167
2168	IRDA_DEBUG(2, "%s(), -------- Start -------- ( Enable = %d )\n", __func__ , enable);
2169
2170	/* Enable the interrupt which we wish to */
2171	if (enable){
2172		if (self->io.direction == IO_XMIT)
2173		{
2174			if (self->io.speed > 115200) /* FIR, MIR */
2175			{
2176				newMask = self->ier;
2177			}
2178			else /* SIR */
2179			{
2180				newMask = UART_IER_THRI | UART_IER_RDI;
2181			}
2182		}
2183		else {
2184			if (self->io.speed > 115200) /* FIR, MIR */
2185			{
2186				newMask = self->ier;
2187			}
2188			else /* SIR */
2189			{
2190				newMask = UART_IER_RDI;
2191			}
2192		}
2193	}
2194	else /* Disable all the interrupts */
2195	{
2196		newMask = 0x00;
2197
2198	}
2199
2200	//SIR and FIR has different registers
2201	if (self->io.speed > 115200)
2202	{
2203		switch_bank(iobase, BANK0);
2204		outb(newMask, iobase+FIR_IER);
2205	}
2206	else
2207		outb(newMask, iobase+UART_IER);
2208
2209	IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
2210}
2211
2212static void SIR2FIR(int iobase)
2213{
2214	//unsigned char tmp;
2215
2216	IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__ );
2217
2218	/* Already protected (change_speed() or setup()), no need to lock.
2219	 * Jean II */
2220
2221	outb(0x28, iobase+UART_MCR);
2222	outb(0x68, iobase+UART_MCR);
2223	outb(0x88, iobase+UART_MCR);
2224
2225	outb(0x60, iobase+FIR_MCR); 	/*  Master Reset */
2226	outb(0x20, iobase+FIR_MCR); 	/*  Master Interrupt Enable */
2227
2228	//tmp = inb(iobase+FIR_LCR_B);	/* SIP enable */
2229	//tmp |= 0x20;
2230	//outb(tmp, iobase+FIR_LCR_B);
2231
2232	IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
2233}
2234
2235static void FIR2SIR(int iobase)
2236{
2237	unsigned char val;
2238
2239	IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__ );
2240
2241	/* Already protected (change_speed() or setup()), no need to lock.
2242	 * Jean II */
2243
2244	outb(0x20, iobase+FIR_MCR); 	/* IRQ to low */
2245	outb(0x00, iobase+UART_IER);
2246
2247	outb(0xA0, iobase+FIR_MCR); 	/* Don't set master reset */
2248	outb(0x00, iobase+UART_FCR);
2249	outb(0x07, iobase+UART_FCR);
2250
2251	val = inb(iobase+UART_RX);
2252	val = inb(iobase+UART_LSR);
2253	val = inb(iobase+UART_MSR);
2254
2255	IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
2256}
2257
2258MODULE_AUTHOR("Benjamin Kong <benjamin_kong@ali.com.tw>");
2259MODULE_DESCRIPTION("ALi FIR Controller Driver");
2260MODULE_LICENSE("GPL");
2261MODULE_ALIAS("platform:" ALI_IRCC_DRIVER_NAME);
2262
2263
2264module_param_array(io, int, NULL, 0);
2265MODULE_PARM_DESC(io, "Base I/O addresses");
2266module_param_array(irq, int, NULL, 0);
2267MODULE_PARM_DESC(irq, "IRQ lines");
2268module_param_array(dma, int, NULL, 0);
2269MODULE_PARM_DESC(dma, "DMA channels");
2270
2271module_init(ali_ircc_init);
2272module_exit(ali_ircc_cleanup);
2273