Merge master.kernel.org:/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog
[linux-2.6] / drivers / net / irda / ali-ircc.c
1 /*********************************************************************
2  *                
3  * Filename:      ali-ircc.h
4  * Version:       0.5
5  * Description:   Driver for the ALI M1535D and M1543C FIR Controller
6  * Status:        Experimental.
7  * Author:        Benjamin Kong <benjamin_kong@ali.com.tw>
8  * Created at:    2000/10/16 03:46PM
9  * Modified at:   2001/1/3 02:55PM
10  * Modified by:   Benjamin Kong <benjamin_kong@ali.com.tw>
11  * Modified at:   2003/11/6 and support for ALi south-bridge chipsets M1563
12  * Modified by:   Clear Zhang <clear_zhang@ali.com.tw>
13  * 
14  *     Copyright (c) 2000 Benjamin Kong <benjamin_kong@ali.com.tw>
15  *     All Rights Reserved
16  *      
17  *     This program is free software; you can redistribute it and/or 
18  *     modify it under the terms of the GNU General Public License as 
19  *     published by the Free Software Foundation; either version 2 of 
20  *     the License, or (at your option) any later version.
21  *  
22  ********************************************************************/
23
24 #include <linux/module.h>
25
26 #include <linux/kernel.h>
27 #include <linux/types.h>
28 #include <linux/skbuff.h>
29 #include <linux/netdevice.h>
30 #include <linux/ioport.h>
31 #include <linux/delay.h>
32 #include <linux/slab.h>
33 #include <linux/init.h>
34 #include <linux/rtnetlink.h>
35 #include <linux/serial_reg.h>
36 #include <linux/dma-mapping.h>
37 #include <linux/platform_device.h>
38
39 #include <asm/io.h>
40 #include <asm/dma.h>
41 #include <asm/byteorder.h>
42
43 #include <net/irda/wrapper.h>
44 #include <net/irda/irda.h>
45 #include <net/irda/irda_device.h>
46
47 #include "ali-ircc.h"
48
49 #define CHIP_IO_EXTENT 8
50 #define BROKEN_DONGLE_ID
51
52 #define ALI_IRCC_DRIVER_NAME "ali-ircc"
53
54 /* Power Management */
55 static int ali_ircc_suspend(struct platform_device *dev, pm_message_t state);
56 static int ali_ircc_resume(struct platform_device *dev);
57
58 static struct platform_driver ali_ircc_driver = {
59         .suspend        = ali_ircc_suspend,
60         .resume         = ali_ircc_resume,
61         .driver         = {
62                 .name   = ALI_IRCC_DRIVER_NAME,
63         },
64 };
65
66 /* Module parameters */
67 static int qos_mtt_bits = 0x07;  /* 1 ms or more */
68
69 /* Use BIOS settions by default, but user may supply module parameters */
70 static unsigned int io[]  = { ~0, ~0, ~0, ~0 };
71 static unsigned int irq[] = { 0, 0, 0, 0 };
72 static unsigned int dma[] = { 0, 0, 0, 0 };
73
74 static int  ali_ircc_probe_53(ali_chip_t *chip, chipio_t *info);
75 static int  ali_ircc_init_43(ali_chip_t *chip, chipio_t *info);
76 static int  ali_ircc_init_53(ali_chip_t *chip, chipio_t *info);
77
78 /* These are the currently known ALi sourth-bridge chipsets, the only one difference
79  * is that M1543C doesn't support HP HDSL-3600
80  */
81 static ali_chip_t chips[] =
82 {
83         { "M1543", { 0x3f0, 0x370 }, 0x51, 0x23, 0x20, 0x43, ali_ircc_probe_53, ali_ircc_init_43 },
84         { "M1535", { 0x3f0, 0x370 }, 0x51, 0x23, 0x20, 0x53, ali_ircc_probe_53, ali_ircc_init_53 },
85         { "M1563", { 0x3f0, 0x370 }, 0x51, 0x23, 0x20, 0x63, ali_ircc_probe_53, ali_ircc_init_53 },
86         { NULL }
87 };
88
89 /* Max 4 instances for now */
90 static struct ali_ircc_cb *dev_self[] = { NULL, NULL, NULL, NULL };
91
92 /* Dongle Types */
93 static char *dongle_types[] = {
94         "TFDS6000",
95         "HP HSDL-3600",
96         "HP HSDL-1100", 
97         "No dongle connected",
98 };
99
100 /* Some prototypes */
101 static int  ali_ircc_open(int i, chipio_t *info);
102
103 static int  ali_ircc_close(struct ali_ircc_cb *self);
104
105 static int  ali_ircc_setup(chipio_t *info);
106 static int  ali_ircc_is_receiving(struct ali_ircc_cb *self);
107 static int  ali_ircc_net_open(struct net_device *dev);
108 static int  ali_ircc_net_close(struct net_device *dev);
109 static int  ali_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
110 static void ali_ircc_change_speed(struct ali_ircc_cb *self, __u32 baud);
111 static struct net_device_stats *ali_ircc_net_get_stats(struct net_device *dev);
112
113 /* SIR function */
114 static int  ali_ircc_sir_hard_xmit(struct sk_buff *skb, struct net_device *dev);
115 static irqreturn_t ali_ircc_sir_interrupt(struct ali_ircc_cb *self);
116 static void ali_ircc_sir_receive(struct ali_ircc_cb *self);
117 static void ali_ircc_sir_write_wakeup(struct ali_ircc_cb *self);
118 static int  ali_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len);
119 static void ali_ircc_sir_change_speed(struct ali_ircc_cb *priv, __u32 speed);
120
121 /* FIR function */
122 static int  ali_ircc_fir_hard_xmit(struct sk_buff *skb, struct net_device *dev);
123 static void ali_ircc_fir_change_speed(struct ali_ircc_cb *priv, __u32 speed);
124 static irqreturn_t ali_ircc_fir_interrupt(struct ali_ircc_cb *self);
125 static int  ali_ircc_dma_receive(struct ali_ircc_cb *self); 
126 static int  ali_ircc_dma_receive_complete(struct ali_ircc_cb *self);
127 static int  ali_ircc_dma_xmit_complete(struct ali_ircc_cb *self);
128 static void ali_ircc_dma_xmit(struct ali_ircc_cb *self);
129
130 /* My Function */
131 static int  ali_ircc_read_dongle_id (int i, chipio_t *info);
132 static void ali_ircc_change_dongle_speed(struct ali_ircc_cb *priv, int speed);
133
134 /* ALi chip function */
135 static void SIR2FIR(int iobase);
136 static void FIR2SIR(int iobase);
137 static void SetCOMInterrupts(struct ali_ircc_cb *self , unsigned char enable);
138
139 /*
140  * Function ali_ircc_init ()
141  *
142  *    Initialize chip. Find out whay kinds of chips we are dealing with
143  *    and their configuation registers address
144  */
145 static int __init ali_ircc_init(void)
146 {
147         ali_chip_t *chip;
148         chipio_t info;
149         int ret = -ENODEV;
150         int cfg, cfg_base;
151         int reg, revision;
152         int i = 0;
153         
154         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
155
156         ret = platform_driver_register(&ali_ircc_driver);
157         if (ret) {
158                 IRDA_ERROR("%s, Can't register driver!\n",
159                            ALI_IRCC_DRIVER_NAME);
160                 return ret;
161         }
162
163         
164         /* Probe for all the ALi chipsets we know about */
165         for (chip= chips; chip->name; chip++, i++) 
166         {
167                 IRDA_DEBUG(2, "%s(), Probing for %s ...\n", __FUNCTION__, chip->name);
168                                 
169                 /* Try all config registers for this chip */
170                 for (cfg=0; cfg<2; cfg++)
171                 {
172                         cfg_base = chip->cfg[cfg];
173                         if (!cfg_base)
174                                 continue;
175                                 
176                         memset(&info, 0, sizeof(chipio_t));
177                         info.cfg_base = cfg_base;
178                         info.fir_base = io[i];
179                         info.dma = dma[i];
180                         info.irq = irq[i];
181                         
182                         
183                         /* Enter Configuration */
184                         outb(chip->entr1, cfg_base);
185                         outb(chip->entr2, cfg_base);
186                         
187                         /* Select Logical Device 5 Registers (UART2) */
188                         outb(0x07, cfg_base);
189                         outb(0x05, cfg_base+1);
190                         
191                         /* Read Chip Identification Register */
192                         outb(chip->cid_index, cfg_base);        
193                         reg = inb(cfg_base+1);  
194                                 
195                         if (reg == chip->cid_value)
196                         {
197                                 IRDA_DEBUG(2, "%s(), Chip found at 0x%03x\n", __FUNCTION__, cfg_base);
198                                            
199                                 outb(0x1F, cfg_base);
200                                 revision = inb(cfg_base+1);
201                                 IRDA_DEBUG(2, "%s(), Found %s chip, revision=%d\n", __FUNCTION__,
202                                            chip->name, revision);                                       
203                                 
204                                 /* 
205                                  * If the user supplies the base address, then
206                                  * we init the chip, if not we probe the values
207                                  * set by the BIOS
208                                  */                             
209                                 if (io[i] < 2000)
210                                 {
211                                         chip->init(chip, &info);
212                                 }
213                                 else
214                                 {
215                                         chip->probe(chip, &info);       
216                                 }
217                                 
218                                 if (ali_ircc_open(i, &info) == 0)
219                                         ret = 0;
220                                 i++;                            
221                         }
222                         else
223                         {
224                                 IRDA_DEBUG(2, "%s(), No %s chip at 0x%03x\n", __FUNCTION__, chip->name, cfg_base);
225                         }
226                         /* Exit configuration */
227                         outb(0xbb, cfg_base);
228                 }
229         }               
230                 
231         IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__);                                                 
232
233         if (ret)
234                 platform_driver_unregister(&ali_ircc_driver);
235
236         return ret;
237 }
238
239 /*
240  * Function ali_ircc_cleanup ()
241  *
242  *    Close all configured chips
243  *
244  */
245 static void __exit ali_ircc_cleanup(void)
246 {
247         int i;
248
249         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__); 
250
251         for (i=0; i < 4; i++) {
252                 if (dev_self[i])
253                         ali_ircc_close(dev_self[i]);
254         }
255         
256         platform_driver_unregister(&ali_ircc_driver);
257
258         IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__);
259 }
260
261 /*
262  * Function ali_ircc_open (int i, chipio_t *inf)
263  *
264  *    Open driver instance
265  *
266  */
267 static int ali_ircc_open(int i, chipio_t *info)
268 {
269         struct net_device *dev;
270         struct ali_ircc_cb *self;
271         int dongle_id;
272         int err;
273                         
274         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__); 
275         
276         /* Set FIR FIFO and DMA Threshold */
277         if ((ali_ircc_setup(info)) == -1)
278                 return -1;
279                 
280         dev = alloc_irdadev(sizeof(*self));
281         if (dev == NULL) {
282                 IRDA_ERROR("%s(), can't allocate memory for control block!\n",
283                            __FUNCTION__);
284                 return -ENOMEM;
285         }
286
287         self = dev->priv;
288         self->netdev = dev;
289         spin_lock_init(&self->lock);
290    
291         /* Need to store self somewhere */
292         dev_self[i] = self;
293         self->index = i;
294
295         /* Initialize IO */
296         self->io.cfg_base  = info->cfg_base;    /* In ali_ircc_probe_53 assign          */
297         self->io.fir_base  = info->fir_base;    /* info->sir_base = info->fir_base      */
298         self->io.sir_base  = info->sir_base;    /* ALi SIR and FIR use the same address */
299         self->io.irq       = info->irq;
300         self->io.fir_ext   = CHIP_IO_EXTENT;
301         self->io.dma       = info->dma;
302         self->io.fifo_size = 16;                /* SIR: 16, FIR: 32 Benjamin 2000/11/1 */
303         
304         /* Reserve the ioports that we need */
305         if (!request_region(self->io.fir_base, self->io.fir_ext,
306                             ALI_IRCC_DRIVER_NAME)) {
307                 IRDA_WARNING("%s(), can't get iobase of 0x%03x\n", __FUNCTION__,
308                         self->io.fir_base);
309                 err = -ENODEV;
310                 goto err_out1;
311         }
312
313         /* Initialize QoS for this device */
314         irda_init_max_qos_capabilies(&self->qos);
315         
316         /* The only value we must override it the baudrate */
317         self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
318                 IR_115200|IR_576000|IR_1152000|(IR_4000000 << 8); // benjamin 2000/11/8 05:27PM
319                         
320         self->qos.min_turn_time.bits = qos_mtt_bits;
321                         
322         irda_qos_bits_to_value(&self->qos);
323         
324         /* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
325         self->rx_buff.truesize = 14384; 
326         self->tx_buff.truesize = 14384;
327
328         /* Allocate memory if needed */
329         self->rx_buff.head =
330                 dma_alloc_coherent(NULL, self->rx_buff.truesize,
331                                    &self->rx_buff_dma, GFP_KERNEL);
332         if (self->rx_buff.head == NULL) {
333                 err = -ENOMEM;
334                 goto err_out2;
335         }
336         memset(self->rx_buff.head, 0, self->rx_buff.truesize);
337         
338         self->tx_buff.head =
339                 dma_alloc_coherent(NULL, self->tx_buff.truesize,
340                                    &self->tx_buff_dma, GFP_KERNEL);
341         if (self->tx_buff.head == NULL) {
342                 err = -ENOMEM;
343                 goto err_out3;
344         }
345         memset(self->tx_buff.head, 0, self->tx_buff.truesize);
346
347         self->rx_buff.in_frame = FALSE;
348         self->rx_buff.state = OUTSIDE_FRAME;
349         self->tx_buff.data = self->tx_buff.head;
350         self->rx_buff.data = self->rx_buff.head;
351         
352         /* Reset Tx queue info */
353         self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
354         self->tx_fifo.tail = self->tx_buff.head;
355
356         
357         /* Keep track of module usage */
358         SET_MODULE_OWNER(dev);
359
360         /* Override the network functions we need to use */
361         dev->hard_start_xmit = ali_ircc_sir_hard_xmit;
362         dev->open            = ali_ircc_net_open;
363         dev->stop            = ali_ircc_net_close;
364         dev->do_ioctl        = ali_ircc_net_ioctl;
365         dev->get_stats       = ali_ircc_net_get_stats;
366
367         err = register_netdev(dev);
368         if (err) {
369                 IRDA_ERROR("%s(), register_netdev() failed!\n", __FUNCTION__);
370                 goto err_out4;
371         }
372         IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);
373
374         /* Check dongle id */
375         dongle_id = ali_ircc_read_dongle_id(i, info);
376         IRDA_MESSAGE("%s(), %s, Found dongle: %s\n", __FUNCTION__,
377                      ALI_IRCC_DRIVER_NAME, dongle_types[dongle_id]);
378                 
379         self->io.dongle_id = dongle_id;
380
381         IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__);
382         
383         return 0;
384
385  err_out4:
386         dma_free_coherent(NULL, self->tx_buff.truesize,
387                           self->tx_buff.head, self->tx_buff_dma);
388  err_out3:
389         dma_free_coherent(NULL, self->rx_buff.truesize,
390                           self->rx_buff.head, self->rx_buff_dma);
391  err_out2:
392         release_region(self->io.fir_base, self->io.fir_ext);
393  err_out1:
394         dev_self[i] = NULL;
395         free_netdev(dev);
396         return err;
397 }
398
399
400 /*
401  * Function ali_ircc_close (self)
402  *
403  *    Close driver instance
404  *
405  */
406 static int __exit ali_ircc_close(struct ali_ircc_cb *self)
407 {
408         int iobase;
409
410         IRDA_DEBUG(4, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
411
412         IRDA_ASSERT(self != NULL, return -1;);
413
414         iobase = self->io.fir_base;
415
416         /* Remove netdevice */
417         unregister_netdev(self->netdev);
418
419         /* Release the PORT that this driver is using */
420         IRDA_DEBUG(4, "%s(), Releasing Region %03x\n", __FUNCTION__, self->io.fir_base);
421         release_region(self->io.fir_base, self->io.fir_ext);
422
423         if (self->tx_buff.head)
424                 dma_free_coherent(NULL, self->tx_buff.truesize,
425                                   self->tx_buff.head, self->tx_buff_dma);
426         
427         if (self->rx_buff.head)
428                 dma_free_coherent(NULL, self->rx_buff.truesize,
429                                   self->rx_buff.head, self->rx_buff_dma);
430
431         dev_self[self->index] = NULL;
432         free_netdev(self->netdev);
433         
434         IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__);
435         
436         return 0;
437 }
438
439 /*
440  * Function ali_ircc_init_43 (chip, info)
441  *
442  *    Initialize the ALi M1543 chip. 
443  */
444 static int ali_ircc_init_43(ali_chip_t *chip, chipio_t *info) 
445 {
446         /* All controller information like I/O address, DMA channel, IRQ
447          * are set by BIOS
448          */
449         
450         return 0;
451 }
452
453 /*
454  * Function ali_ircc_init_53 (chip, info)
455  *
456  *    Initialize the ALi M1535 chip. 
457  */
458 static int ali_ircc_init_53(ali_chip_t *chip, chipio_t *info) 
459 {
460         /* All controller information like I/O address, DMA channel, IRQ
461          * are set by BIOS
462          */
463         
464         return 0;
465 }
466
467 /*
468  * Function ali_ircc_probe_53 (chip, info)
469  *      
470  *      Probes for the ALi M1535D or M1535
471  */
472 static int ali_ircc_probe_53(ali_chip_t *chip, chipio_t *info)
473 {
474         int cfg_base = info->cfg_base;
475         int hi, low, reg;
476         
477         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
478         
479         /* Enter Configuration */
480         outb(chip->entr1, cfg_base);
481         outb(chip->entr2, cfg_base);
482         
483         /* Select Logical Device 5 Registers (UART2) */
484         outb(0x07, cfg_base);
485         outb(0x05, cfg_base+1);
486         
487         /* Read address control register */
488         outb(0x60, cfg_base);
489         hi = inb(cfg_base+1);   
490         outb(0x61, cfg_base);
491         low = inb(cfg_base+1);
492         info->fir_base = (hi<<8) + low;
493         
494         info->sir_base = info->fir_base;
495         
496         IRDA_DEBUG(2, "%s(), probing fir_base=0x%03x\n", __FUNCTION__, info->fir_base);
497                 
498         /* Read IRQ control register */
499         outb(0x70, cfg_base);
500         reg = inb(cfg_base+1);
501         info->irq = reg & 0x0f;
502         IRDA_DEBUG(2, "%s(), probing irq=%d\n", __FUNCTION__, info->irq);
503         
504         /* Read DMA channel */
505         outb(0x74, cfg_base);
506         reg = inb(cfg_base+1);
507         info->dma = reg & 0x07;
508         
509         if(info->dma == 0x04)
510                 IRDA_WARNING("%s(), No DMA channel assigned !\n", __FUNCTION__);
511         else
512                 IRDA_DEBUG(2, "%s(), probing dma=%d\n", __FUNCTION__, info->dma);
513         
514         /* Read Enabled Status */
515         outb(0x30, cfg_base);
516         reg = inb(cfg_base+1);
517         info->enabled = (reg & 0x80) && (reg & 0x01);
518         IRDA_DEBUG(2, "%s(), probing enabled=%d\n", __FUNCTION__, info->enabled);
519         
520         /* Read Power Status */
521         outb(0x22, cfg_base);
522         reg = inb(cfg_base+1);
523         info->suspended = (reg & 0x20);
524         IRDA_DEBUG(2, "%s(), probing suspended=%d\n", __FUNCTION__, info->suspended);
525         
526         /* Exit configuration */
527         outb(0xbb, cfg_base);
528                 
529         IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__); 
530         
531         return 0;       
532 }
533
534 /*
535  * Function ali_ircc_setup (info)
536  *
537  *      Set FIR FIFO and DMA Threshold
538  *      Returns non-negative on success.
539  *
540  */
541 static int ali_ircc_setup(chipio_t *info)
542 {
543         unsigned char tmp;
544         int version;
545         int iobase = info->fir_base;
546         
547         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
548         
549         /* Locking comments :
550          * Most operations here need to be protected. We are called before
551          * the device instance is created in ali_ircc_open(), therefore 
552          * nobody can bother us - Jean II */
553
554         /* Switch to FIR space */
555         SIR2FIR(iobase);
556         
557         /* Master Reset */
558         outb(0x40, iobase+FIR_MCR); // benjamin 2000/11/30 11:45AM
559         
560         /* Read FIR ID Version Register */
561         switch_bank(iobase, BANK3);
562         version = inb(iobase+FIR_ID_VR);
563         
564         /* Should be 0x00 in the M1535/M1535D */
565         if(version != 0x00)
566         {
567                 IRDA_ERROR("%s, Wrong chip version %02x\n",
568                            ALI_IRCC_DRIVER_NAME, version);
569                 return -1;
570         }
571         
572         /* Set FIR FIFO Threshold Register */
573         switch_bank(iobase, BANK1);
574         outb(RX_FIFO_Threshold, iobase+FIR_FIFO_TR);
575         
576         /* Set FIR DMA Threshold Register */
577         outb(RX_DMA_Threshold, iobase+FIR_DMA_TR);
578         
579         /* CRC enable */
580         switch_bank(iobase, BANK2);
581         outb(inb(iobase+FIR_IRDA_CR) | IRDA_CR_CRC, iobase+FIR_IRDA_CR);
582         
583         /* NDIS driver set TX Length here BANK2 Alias 3, Alias4*/
584         
585         /* Switch to Bank 0 */
586         switch_bank(iobase, BANK0);
587         
588         tmp = inb(iobase+FIR_LCR_B);
589         tmp &=~0x20; // disable SIP
590         tmp |= 0x80; // these two steps make RX mode
591         tmp &= 0xbf;    
592         outb(tmp, iobase+FIR_LCR_B);
593                 
594         /* Disable Interrupt */
595         outb(0x00, iobase+FIR_IER);
596         
597         
598         /* Switch to SIR space */
599         FIR2SIR(iobase);
600         
601         IRDA_MESSAGE("%s, driver loaded (Benjamin Kong)\n",
602                      ALI_IRCC_DRIVER_NAME);
603         
604         /* Enable receive interrupts */ 
605         // outb(UART_IER_RDI, iobase+UART_IER); //benjamin 2000/11/23 01:25PM
606         // Turn on the interrupts in ali_ircc_net_open
607         
608         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__);        
609         
610         return 0;
611 }
612
613 /*
614  * Function ali_ircc_read_dongle_id (int index, info)
615  *
616  * Try to read dongle indentification. This procedure needs to be executed
617  * once after power-on/reset. It also needs to be used whenever you suspect
618  * that the user may have plugged/unplugged the IrDA Dongle.
619  */
620 static int ali_ircc_read_dongle_id (int i, chipio_t *info)
621 {
622         int dongle_id, reg;
623         int cfg_base = info->cfg_base;
624         
625         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
626                 
627         /* Enter Configuration */
628         outb(chips[i].entr1, cfg_base);
629         outb(chips[i].entr2, cfg_base);
630         
631         /* Select Logical Device 5 Registers (UART2) */
632         outb(0x07, cfg_base);
633         outb(0x05, cfg_base+1);
634         
635         /* Read Dongle ID */
636         outb(0xf0, cfg_base);
637         reg = inb(cfg_base+1);  
638         dongle_id = ((reg>>6)&0x02) | ((reg>>5)&0x01);
639         IRDA_DEBUG(2, "%s(), probing dongle_id=%d, dongle_types=%s\n", __FUNCTION__, 
640                 dongle_id, dongle_types[dongle_id]);
641         
642         /* Exit configuration */
643         outb(0xbb, cfg_base);
644                         
645         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__);        
646         
647         return dongle_id;
648 }
649
650 /*
651  * Function ali_ircc_interrupt (irq, dev_id, regs)
652  *
653  *    An interrupt from the chip has arrived. Time to do some work
654  *
655  */
656 static irqreturn_t ali_ircc_interrupt(int irq, void *dev_id,
657                                         struct pt_regs *regs)
658 {
659         struct net_device *dev = (struct net_device *) dev_id;
660         struct ali_ircc_cb *self;
661         int ret;
662                 
663         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
664                 
665         if (!dev) {
666                 IRDA_WARNING("%s: irq %d for unknown device.\n",
667                              ALI_IRCC_DRIVER_NAME, irq);
668                 return IRQ_NONE;
669         }       
670         
671         self = (struct ali_ircc_cb *) dev->priv;
672         
673         spin_lock(&self->lock);
674         
675         /* Dispatch interrupt handler for the current speed */
676         if (self->io.speed > 115200)
677                 ret = ali_ircc_fir_interrupt(self);
678         else
679                 ret = ali_ircc_sir_interrupt(self);
680                 
681         spin_unlock(&self->lock);
682         
683         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__);
684         return ret;
685 }
686 /*
687  * Function ali_ircc_fir_interrupt(irq, struct ali_ircc_cb *self)
688  *
689  *    Handle MIR/FIR interrupt
690  *
691  */
692 static irqreturn_t ali_ircc_fir_interrupt(struct ali_ircc_cb *self)
693 {
694         __u8 eir, OldMessageCount;
695         int iobase, tmp;
696         
697         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
698         
699         iobase = self->io.fir_base;
700         
701         switch_bank(iobase, BANK0);     
702         self->InterruptID = inb(iobase+FIR_IIR);                
703         self->BusStatus = inb(iobase+FIR_BSR);  
704         
705         OldMessageCount = (self->LineStatus + 1) & 0x07;
706         self->LineStatus = inb(iobase+FIR_LSR); 
707         //self->ier = inb(iobase+FIR_IER);              2000/12/1 04:32PM
708         eir = self->InterruptID & self->ier; /* Mask out the interesting ones */ 
709         
710         IRDA_DEBUG(1, "%s(), self->InterruptID = %x\n", __FUNCTION__,self->InterruptID);
711         IRDA_DEBUG(1, "%s(), self->LineStatus = %x\n", __FUNCTION__,self->LineStatus);
712         IRDA_DEBUG(1, "%s(), self->ier = %x\n", __FUNCTION__,self->ier);
713         IRDA_DEBUG(1, "%s(), eir = %x\n", __FUNCTION__,eir);
714         
715         /* Disable interrupts */
716          SetCOMInterrupts(self, FALSE);
717         
718         /* Tx or Rx Interrupt */
719         
720         if (eir & IIR_EOM) 
721         {               
722                 if (self->io.direction == IO_XMIT) /* TX */
723                 {
724                         IRDA_DEBUG(1, "%s(), ******* IIR_EOM (Tx) *******\n", __FUNCTION__);
725                         
726                         if(ali_ircc_dma_xmit_complete(self))
727                         {
728                                 if (irda_device_txqueue_empty(self->netdev)) 
729                                 {
730                                         /* Prepare for receive */
731                                         ali_ircc_dma_receive(self);                                     
732                                         self->ier = IER_EOM;                                                                    
733                                 }
734                         }
735                         else
736                         {
737                                 self->ier = IER_EOM;                                    
738                         }
739                                                                         
740                 }       
741                 else /* RX */
742                 {
743                         IRDA_DEBUG(1, "%s(), ******* IIR_EOM (Rx) *******\n", __FUNCTION__);
744                         
745                         if(OldMessageCount > ((self->LineStatus+1) & 0x07))
746                         {
747                                 self->rcvFramesOverflow = TRUE; 
748                                 IRDA_DEBUG(1, "%s(), ******* self->rcvFramesOverflow = TRUE ******** \n", __FUNCTION__);
749                         }
750                                                 
751                         if (ali_ircc_dma_receive_complete(self))
752                         {
753                                 IRDA_DEBUG(1, "%s(), ******* receive complete ******** \n", __FUNCTION__);
754                                 
755                                 self->ier = IER_EOM;                            
756                         }
757                         else
758                         {
759                                 IRDA_DEBUG(1, "%s(), ******* Not receive complete ******** \n", __FUNCTION__);
760                                 
761                                 self->ier = IER_EOM | IER_TIMER;                                                                
762                         }       
763                 
764                 }               
765         }
766         /* Timer Interrupt */
767         else if (eir & IIR_TIMER)
768         {       
769                 if(OldMessageCount > ((self->LineStatus+1) & 0x07))
770                 {
771                         self->rcvFramesOverflow = TRUE; 
772                         IRDA_DEBUG(1, "%s(), ******* self->rcvFramesOverflow = TRUE ******* \n", __FUNCTION__);
773                 }
774                 /* Disable Timer */
775                 switch_bank(iobase, BANK1);
776                 tmp = inb(iobase+FIR_CR);
777                 outb( tmp& ~CR_TIMER_EN, iobase+FIR_CR);
778                 
779                 /* Check if this is a Tx timer interrupt */
780                 if (self->io.direction == IO_XMIT)
781                 {
782                         ali_ircc_dma_xmit(self);
783                         
784                         /* Interrupt on EOM */
785                         self->ier = IER_EOM;
786                                                                         
787                 }
788                 else /* Rx */
789                 {
790                         if(ali_ircc_dma_receive_complete(self)) 
791                         {
792                                 self->ier = IER_EOM;
793                         }
794                         else
795                         {
796                                 self->ier = IER_EOM | IER_TIMER;
797                         }       
798                 }               
799         }
800         
801         /* Restore Interrupt */ 
802         SetCOMInterrupts(self, TRUE);   
803                 
804         IRDA_DEBUG(1, "%s(), ----------------- End ---------------\n", __FUNCTION__);
805         return IRQ_RETVAL(eir);
806 }
807
808 /*
809  * Function ali_ircc_sir_interrupt (irq, self, eir)
810  *
811  *    Handle SIR interrupt
812  *
813  */
814 static irqreturn_t ali_ircc_sir_interrupt(struct ali_ircc_cb *self)
815 {
816         int iobase;
817         int iir, lsr;
818         
819         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
820         
821         iobase = self->io.sir_base;
822
823         iir = inb(iobase+UART_IIR) & UART_IIR_ID;
824         if (iir) {      
825                 /* Clear interrupt */
826                 lsr = inb(iobase+UART_LSR);
827
828                 IRDA_DEBUG(4, "%s(), iir=%02x, lsr=%02x, iobase=%#x\n", __FUNCTION__, 
829                            iir, lsr, iobase);
830
831                 switch (iir) 
832                 {
833                         case UART_IIR_RLSI:
834                                 IRDA_DEBUG(2, "%s(), RLSI\n", __FUNCTION__);
835                                 break;
836                         case UART_IIR_RDI:
837                                 /* Receive interrupt */
838                                 ali_ircc_sir_receive(self);
839                                 break;
840                         case UART_IIR_THRI:
841                                 if (lsr & UART_LSR_THRE)
842                                 {
843                                         /* Transmitter ready for data */
844                                         ali_ircc_sir_write_wakeup(self);                                
845                                 }                               
846                                 break;
847                         default:
848                                 IRDA_DEBUG(0, "%s(), unhandled IIR=%#x\n", __FUNCTION__, iir);
849                                 break;
850                 } 
851                 
852         }
853         
854         
855         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__);        
856
857         return IRQ_RETVAL(iir);
858 }
859
860
861 /*
862  * Function ali_ircc_sir_receive (self)
863  *
864  *    Receive one frame from the infrared port
865  *
866  */
867 static void ali_ircc_sir_receive(struct ali_ircc_cb *self) 
868 {
869         int boguscount = 0;
870         int iobase;
871         
872         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
873         IRDA_ASSERT(self != NULL, return;);
874
875         iobase = self->io.sir_base;
876
877         /*  
878          * Receive all characters in Rx FIFO, unwrap and unstuff them. 
879          * async_unwrap_char will deliver all found frames  
880          */
881         do {
882                 async_unwrap_char(self->netdev, &self->stats, &self->rx_buff, 
883                                   inb(iobase+UART_RX));
884
885                 /* Make sure we don't stay here too long */
886                 if (boguscount++ > 32) {
887                         IRDA_DEBUG(2,"%s(), breaking!\n", __FUNCTION__);
888                         break;
889                 }
890         } while (inb(iobase+UART_LSR) & UART_LSR_DR);   
891         
892         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
893 }
894
895 /*
896  * Function ali_ircc_sir_write_wakeup (tty)
897  *
898  *    Called by the driver when there's room for more data.  If we have
899  *    more packets to send, we send them here.
900  *
901  */
902 static void ali_ircc_sir_write_wakeup(struct ali_ircc_cb *self)
903 {
904         int actual = 0;
905         int iobase;     
906
907         IRDA_ASSERT(self != NULL, return;);
908
909         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
910         
911         iobase = self->io.sir_base;
912
913         /* Finished with frame?  */
914         if (self->tx_buff.len > 0)  
915         {
916                 /* Write data left in transmit buffer */
917                 actual = ali_ircc_sir_write(iobase, self->io.fifo_size, 
918                                       self->tx_buff.data, self->tx_buff.len);
919                 self->tx_buff.data += actual;
920                 self->tx_buff.len  -= actual;
921         } 
922         else 
923         {
924                 if (self->new_speed) 
925                 {
926                         /* We must wait until all data are gone */
927                         while(!(inb(iobase+UART_LSR) & UART_LSR_TEMT))
928                                 IRDA_DEBUG(1, "%s(), UART_LSR_THRE\n", __FUNCTION__ );
929                         
930                         IRDA_DEBUG(1, "%s(), Changing speed! self->new_speed = %d\n", __FUNCTION__ , self->new_speed);
931                         ali_ircc_change_speed(self, self->new_speed);
932                         self->new_speed = 0;                    
933                         
934                         // benjamin 2000/11/10 06:32PM
935                         if (self->io.speed > 115200)
936                         {
937                                 IRDA_DEBUG(2, "%s(), ali_ircc_change_speed from UART_LSR_TEMT \n", __FUNCTION__ );                              
938                                         
939                                 self->ier = IER_EOM;
940                                 // SetCOMInterrupts(self, TRUE);                                                        
941                                 return;                                                 
942                         }
943                 }
944                 else
945                 {
946                         netif_wake_queue(self->netdev); 
947                 }
948                         
949                 self->stats.tx_packets++;
950                 
951                 /* Turn on receive interrupts */
952                 outb(UART_IER_RDI, iobase+UART_IER);
953         }
954                 
955         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
956 }
957
958 static void ali_ircc_change_speed(struct ali_ircc_cb *self, __u32 baud)
959 {
960         struct net_device *dev = self->netdev;
961         int iobase;
962         
963         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
964         
965         IRDA_DEBUG(2, "%s(), setting speed = %d \n", __FUNCTION__ , baud);
966         
967         /* This function *must* be called with irq off and spin-lock.
968          * - Jean II */
969
970         iobase = self->io.fir_base;
971         
972         SetCOMInterrupts(self, FALSE); // 2000/11/24 11:43AM
973         
974         /* Go to MIR, FIR Speed */
975         if (baud > 115200)
976         {
977                 
978                                         
979                 ali_ircc_fir_change_speed(self, baud);                  
980                 
981                 /* Install FIR xmit handler*/
982                 dev->hard_start_xmit = ali_ircc_fir_hard_xmit;          
983                                 
984                 /* Enable Interuupt */
985                 self->ier = IER_EOM; // benjamin 2000/11/20 07:24PM                                     
986                                 
987                 /* Be ready for incomming frames */
988                 ali_ircc_dma_receive(self);     // benajmin 2000/11/8 07:46PM not complete
989         }       
990         /* Go to SIR Speed */
991         else
992         {
993                 ali_ircc_sir_change_speed(self, baud);
994                                 
995                 /* Install SIR xmit handler*/
996                 dev->hard_start_xmit = ali_ircc_sir_hard_xmit;
997         }
998         
999                 
1000         SetCOMInterrupts(self, TRUE);   // 2000/11/24 11:43AM
1001                 
1002         netif_wake_queue(self->netdev); 
1003         
1004         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
1005 }
1006
1007 static void ali_ircc_fir_change_speed(struct ali_ircc_cb *priv, __u32 baud)
1008 {
1009                 
1010         int iobase; 
1011         struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
1012         struct net_device *dev;
1013
1014         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1015                 
1016         IRDA_ASSERT(self != NULL, return;);
1017
1018         dev = self->netdev;
1019         iobase = self->io.fir_base;
1020         
1021         IRDA_DEBUG(1, "%s(), self->io.speed = %d, change to speed = %d\n", __FUNCTION__ ,self->io.speed,baud);
1022         
1023         /* Come from SIR speed */
1024         if(self->io.speed <=115200)
1025         {
1026                 SIR2FIR(iobase);
1027         }
1028                 
1029         /* Update accounting for new speed */
1030         self->io.speed = baud;
1031                 
1032         // Set Dongle Speed mode
1033         ali_ircc_change_dongle_speed(self, baud);
1034                 
1035         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
1036 }
1037
1038 /*
1039  * Function ali_sir_change_speed (self, speed)
1040  *
1041  *    Set speed of IrDA port to specified baudrate
1042  *
1043  */
1044 static void ali_ircc_sir_change_speed(struct ali_ircc_cb *priv, __u32 speed)
1045 {
1046         struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
1047         unsigned long flags;
1048         int iobase; 
1049         int fcr;    /* FIFO control reg */
1050         int lcr;    /* Line control reg */
1051         int divisor;
1052
1053         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1054         
1055         IRDA_DEBUG(1, "%s(), Setting speed to: %d\n", __FUNCTION__ , speed);
1056
1057         IRDA_ASSERT(self != NULL, return;);
1058
1059         iobase = self->io.sir_base;
1060         
1061         /* Come from MIR or FIR speed */
1062         if(self->io.speed >115200)
1063         {       
1064                 // Set Dongle Speed mode first
1065                 ali_ircc_change_dongle_speed(self, speed);
1066                         
1067                 FIR2SIR(iobase);
1068         }
1069                 
1070         // Clear Line and Auxiluary status registers 2000/11/24 11:47AM
1071                 
1072         inb(iobase+UART_LSR);
1073         inb(iobase+UART_SCR);
1074                 
1075         /* Update accounting for new speed */
1076         self->io.speed = speed;
1077
1078         spin_lock_irqsave(&self->lock, flags);
1079
1080         divisor = 115200/speed;
1081         
1082         fcr = UART_FCR_ENABLE_FIFO;
1083
1084         /* 
1085          * Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and
1086          * almost 1,7 ms at 19200 bps. At speeds above that we can just forget
1087          * about this timeout since it will always be fast enough. 
1088          */
1089         if (self->io.speed < 38400)
1090                 fcr |= UART_FCR_TRIGGER_1;
1091         else 
1092                 fcr |= UART_FCR_TRIGGER_14;
1093         
1094         /* IrDA ports use 8N1 */
1095         lcr = UART_LCR_WLEN8;
1096         
1097         outb(UART_LCR_DLAB | lcr, iobase+UART_LCR); /* Set DLAB */
1098         outb(divisor & 0xff,      iobase+UART_DLL); /* Set speed */
1099         outb(divisor >> 8,        iobase+UART_DLM);
1100         outb(lcr,                 iobase+UART_LCR); /* Set 8N1  */
1101         outb(fcr,                 iobase+UART_FCR); /* Enable FIFO's */
1102
1103         /* without this, the conection will be broken after come back from FIR speed,
1104            but with this, the SIR connection is harder to established */
1105         outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase+UART_MCR);
1106         
1107         spin_unlock_irqrestore(&self->lock, flags);
1108         
1109         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
1110 }
1111
1112 static void ali_ircc_change_dongle_speed(struct ali_ircc_cb *priv, int speed)
1113 {
1114         
1115         struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
1116         int iobase,dongle_id;
1117         int tmp = 0;
1118                         
1119         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );        
1120         
1121         iobase = self->io.fir_base;     /* or iobase = self->io.sir_base; */
1122         dongle_id = self->io.dongle_id;
1123         
1124         /* We are already locked, no need to do it again */
1125                 
1126         IRDA_DEBUG(1, "%s(), Set Speed for %s , Speed = %d\n", __FUNCTION__ , dongle_types[dongle_id], speed);          
1127         
1128         switch_bank(iobase, BANK2);
1129         tmp = inb(iobase+FIR_IRDA_CR);
1130                 
1131         /* IBM type dongle */
1132         if(dongle_id == 0)
1133         {                               
1134                 if(speed == 4000000)
1135                 {
1136                         //            __ __     
1137                         // SD/MODE __|     |__ __
1138                         //               __ __ 
1139                         // IRTX    __ __|     |__
1140                         //         T1 T2 T3 T4 T5
1141                         
1142                         tmp &=  ~IRDA_CR_HDLC;          // HDLC=0
1143                         tmp |= IRDA_CR_CRC;             // CRC=1
1144                         
1145                         switch_bank(iobase, BANK2);
1146                         outb(tmp, iobase+FIR_IRDA_CR);
1147                         
1148                         // T1 -> SD/MODE:0 IRTX:0
1149                         tmp &= ~0x09;
1150                         tmp |= 0x02;
1151                         outb(tmp, iobase+FIR_IRDA_CR);
1152                         udelay(2);
1153                         
1154                         // T2 -> SD/MODE:1 IRTX:0
1155                         tmp &= ~0x01;
1156                         tmp |= 0x0a;
1157                         outb(tmp, iobase+FIR_IRDA_CR);
1158                         udelay(2);
1159                         
1160                         // T3 -> SD/MODE:1 IRTX:1
1161                         tmp |= 0x0b;
1162                         outb(tmp, iobase+FIR_IRDA_CR);
1163                         udelay(2);
1164                         
1165                         // T4 -> SD/MODE:0 IRTX:1
1166                         tmp &= ~0x08;
1167                         tmp |= 0x03;
1168                         outb(tmp, iobase+FIR_IRDA_CR);
1169                         udelay(2);
1170                         
1171                         // T5 -> SD/MODE:0 IRTX:0
1172                         tmp &= ~0x09;
1173                         tmp |= 0x02;
1174                         outb(tmp, iobase+FIR_IRDA_CR);
1175                         udelay(2);
1176                         
1177                         // reset -> Normal TX output Signal
1178                         outb(tmp & ~0x02, iobase+FIR_IRDA_CR);                          
1179                 }
1180                 else /* speed <=1152000 */
1181                 {       
1182                         //            __        
1183                         // SD/MODE __|  |__
1184                         //
1185                         // IRTX    ________
1186                         //         T1 T2 T3  
1187                         
1188                         /* MIR 115200, 57600 */
1189                         if (speed==1152000)
1190                         {
1191                                 tmp |= 0xA0;       //HDLC=1, 1.152Mbps=1
1192                         }
1193                         else
1194                         {
1195                                 tmp &=~0x80;       //HDLC 0.576Mbps
1196                                 tmp |= 0x20;       //HDLC=1,
1197                         }                       
1198                         
1199                         tmp |= IRDA_CR_CRC;             // CRC=1
1200                         
1201                         switch_bank(iobase, BANK2);
1202                         outb(tmp, iobase+FIR_IRDA_CR);
1203                                                 
1204                         /* MIR 115200, 57600 */ 
1205                                                 
1206                         //switch_bank(iobase, BANK2);                   
1207                         // T1 -> SD/MODE:0 IRTX:0
1208                         tmp &= ~0x09;
1209                         tmp |= 0x02;
1210                         outb(tmp, iobase+FIR_IRDA_CR);
1211                         udelay(2);
1212                         
1213                         // T2 -> SD/MODE:1 IRTX:0
1214                         tmp &= ~0x01;     
1215                         tmp |= 0x0a;      
1216                         outb(tmp, iobase+FIR_IRDA_CR);
1217                         
1218                         // T3 -> SD/MODE:0 IRTX:0
1219                         tmp &= ~0x09;
1220                         tmp |= 0x02;
1221                         outb(tmp, iobase+FIR_IRDA_CR);
1222                         udelay(2);
1223                         
1224                         // reset -> Normal TX output Signal
1225                         outb(tmp & ~0x02, iobase+FIR_IRDA_CR);                                                  
1226                 }               
1227         }
1228         else if (dongle_id == 1) /* HP HDSL-3600 */
1229         {
1230                 switch(speed)
1231                 {
1232                 case 4000000:
1233                         tmp &=  ~IRDA_CR_HDLC;  // HDLC=0
1234                         break;  
1235                         
1236                 case 1152000:
1237                         tmp |= 0xA0;            // HDLC=1, 1.152Mbps=1
1238                         break;
1239                         
1240                 case 576000:
1241                         tmp &=~0x80;            // HDLC 0.576Mbps
1242                         tmp |= 0x20;            // HDLC=1,
1243                         break;
1244                 }                       
1245                         
1246                 tmp |= IRDA_CR_CRC;             // CRC=1
1247                         
1248                 switch_bank(iobase, BANK2);
1249                 outb(tmp, iobase+FIR_IRDA_CR);          
1250         }
1251         else /* HP HDSL-1100 */
1252         {
1253                 if(speed <= 115200) /* SIR */
1254                 {
1255                         
1256                         tmp &= ~IRDA_CR_FIR_SIN;        // HP sin select = 0
1257                         
1258                         switch_bank(iobase, BANK2);
1259                         outb(tmp, iobase+FIR_IRDA_CR);                  
1260                 }
1261                 else /* MIR FIR */
1262                 {       
1263                         
1264                         switch(speed)
1265                         {
1266                         case 4000000:
1267                                 tmp &=  ~IRDA_CR_HDLC;  // HDLC=0
1268                                 break;  
1269                         
1270                         case 1152000:
1271                                 tmp |= 0xA0;            // HDLC=1, 1.152Mbps=1
1272                                 break;
1273                         
1274                         case 576000:
1275                                 tmp &=~0x80;            // HDLC 0.576Mbps
1276                                 tmp |= 0x20;            // HDLC=1,
1277                                 break;
1278                         }                       
1279                         
1280                         tmp |= IRDA_CR_CRC;             // CRC=1
1281                         tmp |= IRDA_CR_FIR_SIN;         // HP sin select = 1
1282                         
1283                         switch_bank(iobase, BANK2);
1284                         outb(tmp, iobase+FIR_IRDA_CR);                  
1285                 }
1286         }
1287                         
1288         switch_bank(iobase, BANK0);
1289         
1290         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );               
1291 }
1292
1293 /*
1294  * Function ali_ircc_sir_write (driver)
1295  *
1296  *    Fill Tx FIFO with transmit data
1297  *
1298  */
1299 static int ali_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len)
1300 {
1301         int actual = 0;
1302         
1303         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1304                 
1305         /* Tx FIFO should be empty! */
1306         if (!(inb(iobase+UART_LSR) & UART_LSR_THRE)) {
1307                 IRDA_DEBUG(0, "%s(), failed, fifo not empty!\n", __FUNCTION__ );
1308                 return 0;
1309         }
1310         
1311         /* Fill FIFO with current frame */
1312         while ((fifo_size-- > 0) && (actual < len)) {
1313                 /* Transmit next byte */
1314                 outb(buf[actual], iobase+UART_TX);
1315
1316                 actual++;
1317         }
1318         
1319         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
1320         return actual;
1321 }
1322
1323 /*
1324  * Function ali_ircc_net_open (dev)
1325  *
1326  *    Start the device
1327  *
1328  */
1329 static int ali_ircc_net_open(struct net_device *dev)
1330 {
1331         struct ali_ircc_cb *self;
1332         int iobase;
1333         char hwname[32];
1334                 
1335         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1336         
1337         IRDA_ASSERT(dev != NULL, return -1;);
1338         
1339         self = (struct ali_ircc_cb *) dev->priv;
1340         
1341         IRDA_ASSERT(self != NULL, return 0;);
1342         
1343         iobase = self->io.fir_base;
1344         
1345         /* Request IRQ and install Interrupt Handler */
1346         if (request_irq(self->io.irq, ali_ircc_interrupt, 0, dev->name, dev)) 
1347         {
1348                 IRDA_WARNING("%s, unable to allocate irq=%d\n",
1349                              ALI_IRCC_DRIVER_NAME,
1350                              self->io.irq);
1351                 return -EAGAIN;
1352         }
1353         
1354         /*
1355          * Always allocate the DMA channel after the IRQ, and clean up on 
1356          * failure.
1357          */
1358         if (request_dma(self->io.dma, dev->name)) {
1359                 IRDA_WARNING("%s, unable to allocate dma=%d\n",
1360                              ALI_IRCC_DRIVER_NAME,
1361                              self->io.dma);
1362                 free_irq(self->io.irq, self);
1363                 return -EAGAIN;
1364         }
1365         
1366         /* Turn on interrups */
1367         outb(UART_IER_RDI , iobase+UART_IER);
1368
1369         /* Ready to play! */
1370         netif_start_queue(dev); //benjamin by irport
1371         
1372         /* Give self a hardware name */
1373         sprintf(hwname, "ALI-FIR @ 0x%03x", self->io.fir_base);
1374
1375         /* 
1376          * Open new IrLAP layer instance, now that everything should be
1377          * initialized properly 
1378          */
1379         self->irlap = irlap_open(dev, &self->qos, hwname);
1380                 
1381         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
1382         
1383         return 0;
1384 }
1385
1386 /*
1387  * Function ali_ircc_net_close (dev)
1388  *
1389  *    Stop the device
1390  *
1391  */
1392 static int ali_ircc_net_close(struct net_device *dev)
1393 {       
1394
1395         struct ali_ircc_cb *self;
1396         //int iobase;
1397                         
1398         IRDA_DEBUG(4, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1399                 
1400         IRDA_ASSERT(dev != NULL, return -1;);
1401
1402         self = (struct ali_ircc_cb *) dev->priv;
1403         IRDA_ASSERT(self != NULL, return 0;);
1404
1405         /* Stop device */
1406         netif_stop_queue(dev);
1407         
1408         /* Stop and remove instance of IrLAP */
1409         if (self->irlap)
1410                 irlap_close(self->irlap);
1411         self->irlap = NULL;
1412                 
1413         disable_dma(self->io.dma);
1414
1415         /* Disable interrupts */
1416         SetCOMInterrupts(self, FALSE);
1417                
1418         free_irq(self->io.irq, dev);
1419         free_dma(self->io.dma);
1420
1421         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
1422         
1423         return 0;
1424 }
1425
1426 /*
1427  * Function ali_ircc_fir_hard_xmit (skb, dev)
1428  *
1429  *    Transmit the frame
1430  *
1431  */
1432 static int ali_ircc_fir_hard_xmit(struct sk_buff *skb, struct net_device *dev)
1433 {
1434         struct ali_ircc_cb *self;
1435         unsigned long flags;
1436         int iobase;
1437         __u32 speed;
1438         int mtt, diff;
1439         
1440         IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );       
1441         
1442         self = (struct ali_ircc_cb *) dev->priv;
1443         iobase = self->io.fir_base;
1444
1445         netif_stop_queue(dev);
1446         
1447         /* Make sure tests *& speed change are atomic */
1448         spin_lock_irqsave(&self->lock, flags);
1449         
1450         /* Note : you should make sure that speed changes are not going
1451          * to corrupt any outgoing frame. Look at nsc-ircc for the gory
1452          * details - Jean II */
1453
1454         /* Check if we need to change the speed */
1455         speed = irda_get_next_speed(skb);
1456         if ((speed != self->io.speed) && (speed != -1)) {
1457                 /* Check for empty frame */
1458                 if (!skb->len) {
1459                         ali_ircc_change_speed(self, speed); 
1460                         dev->trans_start = jiffies;
1461                         spin_unlock_irqrestore(&self->lock, flags);
1462                         dev_kfree_skb(skb);
1463                         return 0;
1464                 } else
1465                         self->new_speed = speed;
1466         }
1467
1468         /* Register and copy this frame to DMA memory */
1469         self->tx_fifo.queue[self->tx_fifo.free].start = self->tx_fifo.tail;
1470         self->tx_fifo.queue[self->tx_fifo.free].len = skb->len;
1471         self->tx_fifo.tail += skb->len;
1472
1473         self->stats.tx_bytes += skb->len;
1474
1475         memcpy(self->tx_fifo.queue[self->tx_fifo.free].start, skb->data, 
1476                skb->len);
1477         
1478         self->tx_fifo.len++;
1479         self->tx_fifo.free++;
1480
1481         /* Start transmit only if there is currently no transmit going on */
1482         if (self->tx_fifo.len == 1) 
1483         {
1484                 /* Check if we must wait the min turn time or not */
1485                 mtt = irda_get_mtt(skb);
1486                                 
1487                 if (mtt) 
1488                 {
1489                         /* Check how much time we have used already */
1490                         do_gettimeofday(&self->now);
1491                         
1492                         diff = self->now.tv_usec - self->stamp.tv_usec;
1493                         /* self->stamp is set from ali_ircc_dma_receive_complete() */
1494                                                         
1495                         IRDA_DEBUG(1, "%s(), ******* diff = %d ******* \n", __FUNCTION__ , diff);       
1496                         
1497                         if (diff < 0) 
1498                                 diff += 1000000;
1499                         
1500                         /* Check if the mtt is larger than the time we have
1501                          * already used by all the protocol processing
1502                          */
1503                         if (mtt > diff)
1504                         {                               
1505                                 mtt -= diff;
1506                                                                 
1507                                 /* 
1508                                  * Use timer if delay larger than 1000 us, and
1509                                  * use udelay for smaller values which should
1510                                  * be acceptable
1511                                  */
1512                                 if (mtt > 500) 
1513                                 {
1514                                         /* Adjust for timer resolution */
1515                                         mtt = (mtt+250) / 500;  /* 4 discard, 5 get advanced, Let's round off */
1516                                         
1517                                         IRDA_DEBUG(1, "%s(), ************** mtt = %d ***********\n", __FUNCTION__ , mtt);       
1518                                         
1519                                         /* Setup timer */
1520                                         if (mtt == 1) /* 500 us */
1521                                         {
1522                                                 switch_bank(iobase, BANK1);
1523                                                 outb(TIMER_IIR_500, iobase+FIR_TIMER_IIR);
1524                                         }       
1525                                         else if (mtt == 2) /* 1 ms */
1526                                         {
1527                                                 switch_bank(iobase, BANK1);
1528                                                 outb(TIMER_IIR_1ms, iobase+FIR_TIMER_IIR);
1529                                         }                                       
1530                                         else /* > 2ms -> 4ms */
1531                                         {
1532                                                 switch_bank(iobase, BANK1);
1533                                                 outb(TIMER_IIR_2ms, iobase+FIR_TIMER_IIR);
1534                                         }
1535                                         
1536                                         
1537                                         /* Start timer */
1538                                         outb(inb(iobase+FIR_CR) | CR_TIMER_EN, iobase+FIR_CR);
1539                                         self->io.direction = IO_XMIT;
1540                                         
1541                                         /* Enable timer interrupt */
1542                                         self->ier = IER_TIMER;
1543                                         SetCOMInterrupts(self, TRUE);                                   
1544                                         
1545                                         /* Timer will take care of the rest */
1546                                         goto out; 
1547                                 } 
1548                                 else
1549                                         udelay(mtt);
1550                         } // if (if (mtt > diff)
1551                 }// if (mtt) 
1552                                 
1553                 /* Enable EOM interrupt */
1554                 self->ier = IER_EOM;
1555                 SetCOMInterrupts(self, TRUE);
1556                 
1557                 /* Transmit frame */
1558                 ali_ircc_dma_xmit(self);
1559         } // if (self->tx_fifo.len == 1) 
1560         
1561  out:
1562         
1563         /* Not busy transmitting anymore if window is not full */
1564         if (self->tx_fifo.free < MAX_TX_WINDOW)
1565                 netif_wake_queue(self->netdev);
1566         
1567         /* Restore bank register */
1568         switch_bank(iobase, BANK0);
1569
1570         dev->trans_start = jiffies;
1571         spin_unlock_irqrestore(&self->lock, flags);
1572         dev_kfree_skb(skb);
1573
1574         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
1575         return 0;       
1576 }
1577
1578
1579 static void ali_ircc_dma_xmit(struct ali_ircc_cb *self)
1580 {
1581         int iobase, tmp;
1582         unsigned char FIFO_OPTI, Hi, Lo;
1583         
1584         
1585         IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );       
1586         
1587         iobase = self->io.fir_base;
1588         
1589         /* FIFO threshold , this method comes from NDIS5 code */
1590         
1591         if(self->tx_fifo.queue[self->tx_fifo.ptr].len < TX_FIFO_Threshold)
1592                 FIFO_OPTI = self->tx_fifo.queue[self->tx_fifo.ptr].len-1;
1593         else
1594                 FIFO_OPTI = TX_FIFO_Threshold;
1595         
1596         /* Disable DMA */
1597         switch_bank(iobase, BANK1);
1598         outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1599         
1600         self->io.direction = IO_XMIT;
1601         
1602         irda_setup_dma(self->io.dma, 
1603                        ((u8 *)self->tx_fifo.queue[self->tx_fifo.ptr].start -
1604                         self->tx_buff.head) + self->tx_buff_dma,
1605                        self->tx_fifo.queue[self->tx_fifo.ptr].len, 
1606                        DMA_TX_MODE);
1607                 
1608         /* Reset Tx FIFO */
1609         switch_bank(iobase, BANK0);
1610         outb(LCR_A_FIFO_RESET, iobase+FIR_LCR_A);
1611         
1612         /* Set Tx FIFO threshold */
1613         if (self->fifo_opti_buf!=FIFO_OPTI) 
1614         {
1615                 switch_bank(iobase, BANK1);
1616                 outb(FIFO_OPTI, iobase+FIR_FIFO_TR) ;
1617                 self->fifo_opti_buf=FIFO_OPTI;
1618         }
1619         
1620         /* Set Tx DMA threshold */
1621         switch_bank(iobase, BANK1);
1622         outb(TX_DMA_Threshold, iobase+FIR_DMA_TR);
1623         
1624         /* Set max Tx frame size */
1625         Hi = (self->tx_fifo.queue[self->tx_fifo.ptr].len >> 8) & 0x0f;
1626         Lo = self->tx_fifo.queue[self->tx_fifo.ptr].len & 0xff;
1627         switch_bank(iobase, BANK2);
1628         outb(Hi, iobase+FIR_TX_DSR_HI);
1629         outb(Lo, iobase+FIR_TX_DSR_LO);
1630         
1631         /* Disable SIP , Disable Brick Wall (we don't support in TX mode), Change to TX mode */
1632         switch_bank(iobase, BANK0);     
1633         tmp = inb(iobase+FIR_LCR_B);
1634         tmp &= ~0x20; // Disable SIP
1635         outb(((unsigned char)(tmp & 0x3f) | LCR_B_TX_MODE) & ~LCR_B_BW, iobase+FIR_LCR_B);
1636         IRDA_DEBUG(1, "%s(), ******* Change to TX mode: FIR_LCR_B = 0x%x ******* \n", __FUNCTION__ , inb(iobase+FIR_LCR_B));
1637         
1638         outb(0, iobase+FIR_LSR);
1639                         
1640         /* Enable DMA and Burst Mode */
1641         switch_bank(iobase, BANK1);
1642         outb(inb(iobase+FIR_CR) | CR_DMA_EN | CR_DMA_BURST, iobase+FIR_CR);
1643         
1644         switch_bank(iobase, BANK0); 
1645         
1646         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1647 }
1648
1649 static int  ali_ircc_dma_xmit_complete(struct ali_ircc_cb *self)
1650 {
1651         int iobase;
1652         int ret = TRUE;
1653         
1654         IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );       
1655         
1656         iobase = self->io.fir_base;
1657         
1658         /* Disable DMA */
1659         switch_bank(iobase, BANK1);
1660         outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1661         
1662         /* Check for underrun! */
1663         switch_bank(iobase, BANK0);
1664         if((inb(iobase+FIR_LSR) & LSR_FRAME_ABORT) == LSR_FRAME_ABORT)
1665         
1666         {
1667                 IRDA_ERROR("%s(), ********* LSR_FRAME_ABORT *********\n", __FUNCTION__);        
1668                 self->stats.tx_errors++;
1669                 self->stats.tx_fifo_errors++;           
1670         }
1671         else 
1672         {
1673                 self->stats.tx_packets++;
1674         }
1675
1676         /* Check if we need to change the speed */
1677         if (self->new_speed) 
1678         {
1679                 ali_ircc_change_speed(self, self->new_speed);
1680                 self->new_speed = 0;
1681         }
1682
1683         /* Finished with this frame, so prepare for next */
1684         self->tx_fifo.ptr++;
1685         self->tx_fifo.len--;
1686
1687         /* Any frames to be sent back-to-back? */
1688         if (self->tx_fifo.len) 
1689         {
1690                 ali_ircc_dma_xmit(self);
1691                 
1692                 /* Not finished yet! */
1693                 ret = FALSE;
1694         } 
1695         else 
1696         {       /* Reset Tx FIFO info */
1697                 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1698                 self->tx_fifo.tail = self->tx_buff.head;
1699         }
1700
1701         /* Make sure we have room for more frames */
1702         if (self->tx_fifo.free < MAX_TX_WINDOW) {
1703                 /* Not busy transmitting anymore */
1704                 /* Tell the network layer, that we can accept more frames */
1705                 netif_wake_queue(self->netdev);
1706         }
1707                 
1708         switch_bank(iobase, BANK0); 
1709         
1710         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
1711         return ret;
1712 }
1713
1714 /*
1715  * Function ali_ircc_dma_receive (self)
1716  *
1717  *    Get ready for receiving a frame. The device will initiate a DMA
1718  *    if it starts to receive a frame.
1719  *
1720  */
1721 static int ali_ircc_dma_receive(struct ali_ircc_cb *self) 
1722 {
1723         int iobase, tmp;
1724         
1725         IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );       
1726         
1727         iobase = self->io.fir_base;
1728         
1729         /* Reset Tx FIFO info */
1730         self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1731         self->tx_fifo.tail = self->tx_buff.head;
1732                 
1733         /* Disable DMA */
1734         switch_bank(iobase, BANK1);
1735         outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1736         
1737         /* Reset Message Count */
1738         switch_bank(iobase, BANK0);
1739         outb(0x07, iobase+FIR_LSR);
1740                 
1741         self->rcvFramesOverflow = FALSE;        
1742         
1743         self->LineStatus = inb(iobase+FIR_LSR) ;
1744         
1745         /* Reset Rx FIFO info */
1746         self->io.direction = IO_RECV;
1747         self->rx_buff.data = self->rx_buff.head;
1748                 
1749         /* Reset Rx FIFO */
1750         // switch_bank(iobase, BANK0);
1751         outb(LCR_A_FIFO_RESET, iobase+FIR_LCR_A); 
1752         
1753         self->st_fifo.len = self->st_fifo.pending_bytes = 0;
1754         self->st_fifo.tail = self->st_fifo.head = 0;
1755                 
1756         irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize,
1757                        DMA_RX_MODE);
1758          
1759         /* Set Receive Mode,Brick Wall */
1760         //switch_bank(iobase, BANK0);
1761         tmp = inb(iobase+FIR_LCR_B);
1762         outb((unsigned char)(tmp &0x3f) | LCR_B_RX_MODE | LCR_B_BW , iobase + FIR_LCR_B); // 2000/12/1 05:16PM
1763         IRDA_DEBUG(1, "%s(), *** Change To RX mode: FIR_LCR_B = 0x%x *** \n", __FUNCTION__ , inb(iobase+FIR_LCR_B));
1764                         
1765         /* Set Rx Threshold */
1766         switch_bank(iobase, BANK1);
1767         outb(RX_FIFO_Threshold, iobase+FIR_FIFO_TR);
1768         outb(RX_DMA_Threshold, iobase+FIR_DMA_TR);
1769                 
1770         /* Enable DMA and Burst Mode */
1771         // switch_bank(iobase, BANK1);
1772         outb(CR_DMA_EN | CR_DMA_BURST, iobase+FIR_CR);
1773                                 
1774         switch_bank(iobase, BANK0); 
1775         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
1776         return 0;
1777 }
1778
1779 static int  ali_ircc_dma_receive_complete(struct ali_ircc_cb *self)
1780 {
1781         struct st_fifo *st_fifo;
1782         struct sk_buff *skb;
1783         __u8 status, MessageCount;
1784         int len, i, iobase, val;        
1785
1786         IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );       
1787
1788         st_fifo = &self->st_fifo;               
1789         iobase = self->io.fir_base;     
1790                 
1791         switch_bank(iobase, BANK0);
1792         MessageCount = inb(iobase+ FIR_LSR)&0x07;
1793         
1794         if (MessageCount > 0)   
1795                 IRDA_DEBUG(0, "%s(), Messsage count = %d,\n", __FUNCTION__ , MessageCount);     
1796                 
1797         for (i=0; i<=MessageCount; i++)
1798         {
1799                 /* Bank 0 */
1800                 switch_bank(iobase, BANK0);
1801                 status = inb(iobase+FIR_LSR);
1802                 
1803                 switch_bank(iobase, BANK2);
1804                 len = inb(iobase+FIR_RX_DSR_HI) & 0x0f;
1805                 len = len << 8; 
1806                 len |= inb(iobase+FIR_RX_DSR_LO);
1807                 
1808                 IRDA_DEBUG(1, "%s(), RX Length = 0x%.2x,\n", __FUNCTION__ , len);       
1809                 IRDA_DEBUG(1, "%s(), RX Status = 0x%.2x,\n", __FUNCTION__ , status);
1810                 
1811                 if (st_fifo->tail >= MAX_RX_WINDOW) {
1812                         IRDA_DEBUG(0, "%s(), window is full!\n", __FUNCTION__ );
1813                         continue;
1814                 }
1815                         
1816                 st_fifo->entries[st_fifo->tail].status = status;
1817                 st_fifo->entries[st_fifo->tail].len = len;
1818                 st_fifo->pending_bytes += len;
1819                 st_fifo->tail++;
1820                 st_fifo->len++;
1821         }
1822                         
1823         for (i=0; i<=MessageCount; i++)
1824         {       
1825                 /* Get first entry */
1826                 status = st_fifo->entries[st_fifo->head].status;
1827                 len    = st_fifo->entries[st_fifo->head].len;
1828                 st_fifo->pending_bytes -= len;
1829                 st_fifo->head++;
1830                 st_fifo->len--;                 
1831                 
1832                 /* Check for errors */
1833                 if ((status & 0xd8) || self->rcvFramesOverflow || (len==0))             
1834                 {
1835                         IRDA_DEBUG(0,"%s(), ************* RX Errors ************ \n", __FUNCTION__ );   
1836                         
1837                         /* Skip frame */
1838                         self->stats.rx_errors++;
1839                         
1840                         self->rx_buff.data += len;
1841                         
1842                         if (status & LSR_FIFO_UR) 
1843                         {
1844                                 self->stats.rx_frame_errors++;
1845                                 IRDA_DEBUG(0,"%s(), ************* FIFO Errors ************ \n", __FUNCTION__ );
1846                         }       
1847                         if (status & LSR_FRAME_ERROR)
1848                         {
1849                                 self->stats.rx_frame_errors++;
1850                                 IRDA_DEBUG(0,"%s(), ************* FRAME Errors ************ \n", __FUNCTION__ );
1851                         }
1852                                                         
1853                         if (status & LSR_CRC_ERROR) 
1854                         {
1855                                 self->stats.rx_crc_errors++;
1856                                 IRDA_DEBUG(0,"%s(), ************* CRC Errors ************ \n", __FUNCTION__ );
1857                         }
1858                         
1859                         if(self->rcvFramesOverflow)
1860                         {
1861                                 self->stats.rx_frame_errors++;
1862                                 IRDA_DEBUG(0,"%s(), ************* Overran DMA buffer ************ \n", __FUNCTION__ );                                                          
1863                         }
1864                         if(len == 0)
1865                         {
1866                                 self->stats.rx_frame_errors++;
1867                                 IRDA_DEBUG(0,"%s(), ********** Receive Frame Size = 0 ********* \n", __FUNCTION__ );
1868                         }
1869                 }        
1870                 else 
1871                 {
1872                         
1873                         if (st_fifo->pending_bytes < 32) 
1874                         {
1875                                 switch_bank(iobase, BANK0);
1876                                 val = inb(iobase+FIR_BSR);      
1877                                 if ((val& BSR_FIFO_NOT_EMPTY)== 0x80) 
1878                                 {
1879                                         IRDA_DEBUG(0, "%s(), ************* BSR_FIFO_NOT_EMPTY ************ \n", __FUNCTION__ );
1880                                         
1881                                         /* Put this entry back in fifo */
1882                                         st_fifo->head--;
1883                                         st_fifo->len++;
1884                                         st_fifo->pending_bytes += len;
1885                                         st_fifo->entries[st_fifo->head].status = status;
1886                                         st_fifo->entries[st_fifo->head].len = len;
1887                                                 
1888                                         /*  
1889                                         * DMA not finished yet, so try again 
1890                                         * later, set timer value, resolution 
1891                                         * 500 us 
1892                                         */
1893                                          
1894                                         switch_bank(iobase, BANK1);
1895                                         outb(TIMER_IIR_500, iobase+FIR_TIMER_IIR); // 2001/1/2 05:07PM
1896                                         
1897                                         /* Enable Timer */
1898                                         outb(inb(iobase+FIR_CR) | CR_TIMER_EN, iobase+FIR_CR);
1899                                                 
1900                                         return FALSE; /* I'll be back! */
1901                                 }
1902                         }               
1903                         
1904                         /* 
1905                          * Remember the time we received this frame, so we can
1906                          * reduce the min turn time a bit since we will know
1907                          * how much time we have used for protocol processing
1908                          */
1909                         do_gettimeofday(&self->stamp);
1910
1911                         skb = dev_alloc_skb(len+1);
1912                         if (skb == NULL)  
1913                         {
1914                                 IRDA_WARNING("%s(), memory squeeze, "
1915                                              "dropping frame.\n",
1916                                              __FUNCTION__);
1917                                 self->stats.rx_dropped++;
1918
1919                                 return FALSE;
1920                         }
1921                         
1922                         /* Make sure IP header gets aligned */
1923                         skb_reserve(skb, 1); 
1924                         
1925                         /* Copy frame without CRC, CRC is removed by hardware*/
1926                         skb_put(skb, len);
1927                         memcpy(skb->data, self->rx_buff.data, len);
1928
1929                         /* Move to next frame */
1930                         self->rx_buff.data += len;
1931                         self->stats.rx_bytes += len;
1932                         self->stats.rx_packets++;
1933
1934                         skb->dev = self->netdev;
1935                         skb->mac.raw  = skb->data;
1936                         skb->protocol = htons(ETH_P_IRDA);
1937                         netif_rx(skb);
1938                         self->netdev->last_rx = jiffies;
1939                 }
1940         }
1941         
1942         switch_bank(iobase, BANK0);     
1943                 
1944         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
1945         return TRUE;
1946 }
1947
1948
1949
1950 /*
1951  * Function ali_ircc_sir_hard_xmit (skb, dev)
1952  *
1953  *    Transmit the frame!
1954  *
1955  */
1956 static int ali_ircc_sir_hard_xmit(struct sk_buff *skb, struct net_device *dev)
1957 {
1958         struct ali_ircc_cb *self;
1959         unsigned long flags;
1960         int iobase;
1961         __u32 speed;
1962         
1963         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1964         
1965         IRDA_ASSERT(dev != NULL, return 0;);
1966         
1967         self = (struct ali_ircc_cb *) dev->priv;
1968         IRDA_ASSERT(self != NULL, return 0;);
1969
1970         iobase = self->io.sir_base;
1971
1972         netif_stop_queue(dev);
1973         
1974         /* Make sure tests *& speed change are atomic */
1975         spin_lock_irqsave(&self->lock, flags);
1976
1977         /* Note : you should make sure that speed changes are not going
1978          * to corrupt any outgoing frame. Look at nsc-ircc for the gory
1979          * details - Jean II */
1980
1981         /* Check if we need to change the speed */
1982         speed = irda_get_next_speed(skb);
1983         if ((speed != self->io.speed) && (speed != -1)) {
1984                 /* Check for empty frame */
1985                 if (!skb->len) {
1986                         ali_ircc_change_speed(self, speed); 
1987                         dev->trans_start = jiffies;
1988                         spin_unlock_irqrestore(&self->lock, flags);
1989                         dev_kfree_skb(skb);
1990                         return 0;
1991                 } else
1992                         self->new_speed = speed;
1993         }
1994
1995         /* Init tx buffer */
1996         self->tx_buff.data = self->tx_buff.head;
1997
1998         /* Copy skb to tx_buff while wrapping, stuffing and making CRC */
1999         self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data, 
2000                                            self->tx_buff.truesize);
2001         
2002         self->stats.tx_bytes += self->tx_buff.len;
2003
2004         /* Turn on transmit finished interrupt. Will fire immediately!  */
2005         outb(UART_IER_THRI, iobase+UART_IER); 
2006
2007         dev->trans_start = jiffies;
2008         spin_unlock_irqrestore(&self->lock, flags);
2009
2010         dev_kfree_skb(skb);
2011         
2012         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
2013         
2014         return 0;       
2015 }
2016
2017
2018 /*
2019  * Function ali_ircc_net_ioctl (dev, rq, cmd)
2020  *
2021  *    Process IOCTL commands for this device
2022  *
2023  */
2024 static int ali_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2025 {
2026         struct if_irda_req *irq = (struct if_irda_req *) rq;
2027         struct ali_ircc_cb *self;
2028         unsigned long flags;
2029         int ret = 0;
2030         
2031         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
2032         
2033         IRDA_ASSERT(dev != NULL, return -1;);
2034
2035         self = dev->priv;
2036
2037         IRDA_ASSERT(self != NULL, return -1;);
2038
2039         IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __FUNCTION__ , dev->name, cmd);
2040         
2041         switch (cmd) {
2042         case SIOCSBANDWIDTH: /* Set bandwidth */
2043                 IRDA_DEBUG(1, "%s(), SIOCSBANDWIDTH\n", __FUNCTION__ );
2044                 /*
2045                  * This function will also be used by IrLAP to change the
2046                  * speed, so we still must allow for speed change within
2047                  * interrupt context.
2048                  */
2049                 if (!in_interrupt() && !capable(CAP_NET_ADMIN))
2050                         return -EPERM;
2051                 
2052                 spin_lock_irqsave(&self->lock, flags);
2053                 ali_ircc_change_speed(self, irq->ifr_baudrate);         
2054                 spin_unlock_irqrestore(&self->lock, flags);
2055                 break;
2056         case SIOCSMEDIABUSY: /* Set media busy */
2057                 IRDA_DEBUG(1, "%s(), SIOCSMEDIABUSY\n", __FUNCTION__ );
2058                 if (!capable(CAP_NET_ADMIN))
2059                         return -EPERM;
2060                 irda_device_set_media_busy(self->netdev, TRUE);
2061                 break;
2062         case SIOCGRECEIVING: /* Check if we are receiving right now */
2063                 IRDA_DEBUG(2, "%s(), SIOCGRECEIVING\n", __FUNCTION__ );
2064                 /* This is protected */
2065                 irq->ifr_receiving = ali_ircc_is_receiving(self);
2066                 break;
2067         default:
2068                 ret = -EOPNOTSUPP;
2069         }
2070         
2071         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
2072         
2073         return ret;
2074 }
2075
2076 /*
2077  * Function ali_ircc_is_receiving (self)
2078  *
2079  *    Return TRUE is we are currently receiving a frame
2080  *
2081  */
2082 static int ali_ircc_is_receiving(struct ali_ircc_cb *self)
2083 {
2084         unsigned long flags;
2085         int status = FALSE;
2086         int iobase;             
2087         
2088         IRDA_DEBUG(2, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );
2089         
2090         IRDA_ASSERT(self != NULL, return FALSE;);
2091
2092         spin_lock_irqsave(&self->lock, flags);
2093
2094         if (self->io.speed > 115200) 
2095         {
2096                 iobase = self->io.fir_base;
2097                 
2098                 switch_bank(iobase, BANK1);
2099                 if((inb(iobase+FIR_FIFO_FR) & 0x3f) != 0)               
2100                 {
2101                         /* We are receiving something */
2102                         IRDA_DEBUG(1, "%s(), We are receiving something\n", __FUNCTION__ );
2103                         status = TRUE;
2104                 }
2105                 switch_bank(iobase, BANK0);             
2106         } 
2107         else
2108         { 
2109                 status = (self->rx_buff.state != OUTSIDE_FRAME);
2110         }
2111         
2112         spin_unlock_irqrestore(&self->lock, flags);
2113         
2114         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2115         
2116         return status;
2117 }
2118
2119 static struct net_device_stats *ali_ircc_net_get_stats(struct net_device *dev)
2120 {
2121         struct ali_ircc_cb *self = (struct ali_ircc_cb *) dev->priv;
2122         
2123         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
2124                 
2125         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
2126         
2127         return &self->stats;
2128 }
2129
2130 static int ali_ircc_suspend(struct platform_device *dev, pm_message_t state)
2131 {
2132         struct ali_ircc_cb *self = platform_get_drvdata(dev);
2133         
2134         IRDA_MESSAGE("%s, Suspending\n", ALI_IRCC_DRIVER_NAME);
2135
2136         if (self->io.suspended)
2137                 return 0;
2138
2139         ali_ircc_net_close(self->netdev);
2140
2141         self->io.suspended = 1;
2142         
2143         return 0;
2144 }
2145
2146 static int ali_ircc_resume(struct platform_device *dev)
2147 {
2148         struct ali_ircc_cb *self = platform_get_drvdata(dev);
2149         
2150         if (!self->io.suspended)
2151                 return 0;
2152         
2153         ali_ircc_net_open(self->netdev);
2154         
2155         IRDA_MESSAGE("%s, Waking up\n", ALI_IRCC_DRIVER_NAME);
2156
2157         self->io.suspended = 0;
2158
2159         return 0;
2160 }
2161
2162 /* ALi Chip Function */
2163
2164 static void SetCOMInterrupts(struct ali_ircc_cb *self , unsigned char enable)
2165 {
2166         
2167         unsigned char newMask;
2168         
2169         int iobase = self->io.fir_base; /* or sir_base */
2170
2171         IRDA_DEBUG(2, "%s(), -------- Start -------- ( Enable = %d )\n", __FUNCTION__ , enable);        
2172         
2173         /* Enable the interrupt which we wish to */
2174         if (enable){
2175                 if (self->io.direction == IO_XMIT)
2176                 {
2177                         if (self->io.speed > 115200) /* FIR, MIR */
2178                         {
2179                                 newMask = self->ier;
2180                         }
2181                         else /* SIR */
2182                         {
2183                                 newMask = UART_IER_THRI | UART_IER_RDI;
2184                         }
2185                 }
2186                 else {
2187                         if (self->io.speed > 115200) /* FIR, MIR */
2188                         {
2189                                 newMask = self->ier;
2190                         }
2191                         else /* SIR */
2192                         {
2193                                 newMask = UART_IER_RDI;
2194                         }
2195                 }
2196         }
2197         else /* Disable all the interrupts */
2198         {
2199                 newMask = 0x00;
2200
2201         }
2202
2203         //SIR and FIR has different registers
2204         if (self->io.speed > 115200)
2205         {       
2206                 switch_bank(iobase, BANK0);
2207                 outb(newMask, iobase+FIR_IER);
2208         }
2209         else
2210                 outb(newMask, iobase+UART_IER);
2211                 
2212         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
2213 }
2214
2215 static void SIR2FIR(int iobase)
2216 {
2217         //unsigned char tmp;
2218                 
2219         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
2220         
2221         /* Already protected (change_speed() or setup()), no need to lock.
2222          * Jean II */
2223         
2224         outb(0x28, iobase+UART_MCR);
2225         outb(0x68, iobase+UART_MCR);
2226         outb(0x88, iobase+UART_MCR);            
2227         
2228         outb(0x60, iobase+FIR_MCR);     /*  Master Reset */
2229         outb(0x20, iobase+FIR_MCR);     /*  Master Interrupt Enable */
2230         
2231         //tmp = inb(iobase+FIR_LCR_B);  /* SIP enable */
2232         //tmp |= 0x20;
2233         //outb(tmp, iobase+FIR_LCR_B);  
2234         
2235         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
2236 }
2237
2238 static void FIR2SIR(int iobase)
2239 {
2240         unsigned char val;
2241         
2242         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
2243         
2244         /* Already protected (change_speed() or setup()), no need to lock.
2245          * Jean II */
2246         
2247         outb(0x20, iobase+FIR_MCR);     /* IRQ to low */
2248         outb(0x00, iobase+UART_IER);    
2249                 
2250         outb(0xA0, iobase+FIR_MCR);     /* Don't set master reset */
2251         outb(0x00, iobase+UART_FCR);
2252         outb(0x07, iobase+UART_FCR);            
2253         
2254         val = inb(iobase+UART_RX);
2255         val = inb(iobase+UART_LSR);
2256         val = inb(iobase+UART_MSR);
2257         
2258         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2259 }
2260
2261 MODULE_AUTHOR("Benjamin Kong <benjamin_kong@ali.com.tw>");
2262 MODULE_DESCRIPTION("ALi FIR Controller Driver");
2263 MODULE_LICENSE("GPL");
2264
2265
2266 module_param_array(io, int, NULL, 0);
2267 MODULE_PARM_DESC(io, "Base I/O addresses");
2268 module_param_array(irq, int, NULL, 0);
2269 MODULE_PARM_DESC(irq, "IRQ lines");
2270 module_param_array(dma, int, NULL, 0);
2271 MODULE_PARM_DESC(dma, "DMA channels");
2272
2273 module_init(ali_ircc_init);
2274 module_exit(ali_ircc_cleanup);