[SK_BUFF]: Introduce skb_copy_from_linear_data{_offset}
[linux-3.10.git] / drivers / net / irda / ali-ircc.c
1 /*********************************************************************
2  *                
3  * Filename:      ali-ircc.h
4  * Version:       0.5
5  * Description:   Driver for the ALI M1535D and M1543C FIR Controller
6  * Status:        Experimental.
7  * Author:        Benjamin Kong <benjamin_kong@ali.com.tw>
8  * Created at:    2000/10/16 03:46PM
9  * Modified at:   2001/1/3 02:55PM
10  * Modified by:   Benjamin Kong <benjamin_kong@ali.com.tw>
11  * Modified at:   2003/11/6 and support for ALi south-bridge chipsets M1563
12  * Modified by:   Clear Zhang <clear_zhang@ali.com.tw>
13  * 
14  *     Copyright (c) 2000 Benjamin Kong <benjamin_kong@ali.com.tw>
15  *     All Rights Reserved
16  *      
17  *     This program is free software; you can redistribute it and/or 
18  *     modify it under the terms of the GNU General Public License as 
19  *     published by the Free Software Foundation; either version 2 of 
20  *     the License, or (at your option) any later version.
21  *  
22  ********************************************************************/
23
24 #include <linux/module.h>
25
26 #include <linux/kernel.h>
27 #include <linux/types.h>
28 #include <linux/skbuff.h>
29 #include <linux/netdevice.h>
30 #include <linux/ioport.h>
31 #include <linux/delay.h>
32 #include <linux/slab.h>
33 #include <linux/init.h>
34 #include <linux/rtnetlink.h>
35 #include <linux/serial_reg.h>
36 #include <linux/dma-mapping.h>
37 #include <linux/platform_device.h>
38
39 #include <asm/io.h>
40 #include <asm/dma.h>
41 #include <asm/byteorder.h>
42
43 #include <net/irda/wrapper.h>
44 #include <net/irda/irda.h>
45 #include <net/irda/irda_device.h>
46
47 #include "ali-ircc.h"
48
49 #define CHIP_IO_EXTENT 8
50 #define BROKEN_DONGLE_ID
51
52 #define ALI_IRCC_DRIVER_NAME "ali-ircc"
53
54 /* Power Management */
55 static int ali_ircc_suspend(struct platform_device *dev, pm_message_t state);
56 static int ali_ircc_resume(struct platform_device *dev);
57
58 static struct platform_driver ali_ircc_driver = {
59         .suspend        = ali_ircc_suspend,
60         .resume         = ali_ircc_resume,
61         .driver         = {
62                 .name   = ALI_IRCC_DRIVER_NAME,
63         },
64 };
65
66 /* Module parameters */
67 static int qos_mtt_bits = 0x07;  /* 1 ms or more */
68
69 /* Use BIOS settions by default, but user may supply module parameters */
70 static unsigned int io[]  = { ~0, ~0, ~0, ~0 };
71 static unsigned int irq[] = { 0, 0, 0, 0 };
72 static unsigned int dma[] = { 0, 0, 0, 0 };
73
74 static int  ali_ircc_probe_53(ali_chip_t *chip, chipio_t *info);
75 static int  ali_ircc_init_43(ali_chip_t *chip, chipio_t *info);
76 static int  ali_ircc_init_53(ali_chip_t *chip, chipio_t *info);
77
78 /* These are the currently known ALi sourth-bridge chipsets, the only one difference
79  * is that M1543C doesn't support HP HDSL-3600
80  */
81 static ali_chip_t chips[] =
82 {
83         { "M1543", { 0x3f0, 0x370 }, 0x51, 0x23, 0x20, 0x43, ali_ircc_probe_53, ali_ircc_init_43 },
84         { "M1535", { 0x3f0, 0x370 }, 0x51, 0x23, 0x20, 0x53, ali_ircc_probe_53, ali_ircc_init_53 },
85         { "M1563", { 0x3f0, 0x370 }, 0x51, 0x23, 0x20, 0x63, ali_ircc_probe_53, ali_ircc_init_53 },
86         { NULL }
87 };
88
89 /* Max 4 instances for now */
90 static struct ali_ircc_cb *dev_self[] = { NULL, NULL, NULL, NULL };
91
92 /* Dongle Types */
93 static char *dongle_types[] = {
94         "TFDS6000",
95         "HP HSDL-3600",
96         "HP HSDL-1100", 
97         "No dongle connected",
98 };
99
100 /* Some prototypes */
101 static int  ali_ircc_open(int i, chipio_t *info);
102
103 static int  ali_ircc_close(struct ali_ircc_cb *self);
104
105 static int  ali_ircc_setup(chipio_t *info);
106 static int  ali_ircc_is_receiving(struct ali_ircc_cb *self);
107 static int  ali_ircc_net_open(struct net_device *dev);
108 static int  ali_ircc_net_close(struct net_device *dev);
109 static int  ali_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
110 static void ali_ircc_change_speed(struct ali_ircc_cb *self, __u32 baud);
111 static struct net_device_stats *ali_ircc_net_get_stats(struct net_device *dev);
112
113 /* SIR function */
114 static int  ali_ircc_sir_hard_xmit(struct sk_buff *skb, struct net_device *dev);
115 static irqreturn_t ali_ircc_sir_interrupt(struct ali_ircc_cb *self);
116 static void ali_ircc_sir_receive(struct ali_ircc_cb *self);
117 static void ali_ircc_sir_write_wakeup(struct ali_ircc_cb *self);
118 static int  ali_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len);
119 static void ali_ircc_sir_change_speed(struct ali_ircc_cb *priv, __u32 speed);
120
121 /* FIR function */
122 static int  ali_ircc_fir_hard_xmit(struct sk_buff *skb, struct net_device *dev);
123 static void ali_ircc_fir_change_speed(struct ali_ircc_cb *priv, __u32 speed);
124 static irqreturn_t ali_ircc_fir_interrupt(struct ali_ircc_cb *self);
125 static int  ali_ircc_dma_receive(struct ali_ircc_cb *self); 
126 static int  ali_ircc_dma_receive_complete(struct ali_ircc_cb *self);
127 static int  ali_ircc_dma_xmit_complete(struct ali_ircc_cb *self);
128 static void ali_ircc_dma_xmit(struct ali_ircc_cb *self);
129
130 /* My Function */
131 static int  ali_ircc_read_dongle_id (int i, chipio_t *info);
132 static void ali_ircc_change_dongle_speed(struct ali_ircc_cb *priv, int speed);
133
134 /* ALi chip function */
135 static void SIR2FIR(int iobase);
136 static void FIR2SIR(int iobase);
137 static void SetCOMInterrupts(struct ali_ircc_cb *self , unsigned char enable);
138
139 /*
140  * Function ali_ircc_init ()
141  *
142  *    Initialize chip. Find out whay kinds of chips we are dealing with
143  *    and their configuation registers address
144  */
145 static int __init ali_ircc_init(void)
146 {
147         ali_chip_t *chip;
148         chipio_t info;
149         int ret;
150         int cfg, cfg_base;
151         int reg, revision;
152         int i = 0;
153         
154         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
155
156         ret = platform_driver_register(&ali_ircc_driver);
157         if (ret) {
158                 IRDA_ERROR("%s, Can't register driver!\n",
159                            ALI_IRCC_DRIVER_NAME);
160                 return ret;
161         }
162
163         ret = -ENODEV;
164         
165         /* Probe for all the ALi chipsets we know about */
166         for (chip= chips; chip->name; chip++, i++) 
167         {
168                 IRDA_DEBUG(2, "%s(), Probing for %s ...\n", __FUNCTION__, chip->name);
169                                 
170                 /* Try all config registers for this chip */
171                 for (cfg=0; cfg<2; cfg++)
172                 {
173                         cfg_base = chip->cfg[cfg];
174                         if (!cfg_base)
175                                 continue;
176                                 
177                         memset(&info, 0, sizeof(chipio_t));
178                         info.cfg_base = cfg_base;
179                         info.fir_base = io[i];
180                         info.dma = dma[i];
181                         info.irq = irq[i];
182                         
183                         
184                         /* Enter Configuration */
185                         outb(chip->entr1, cfg_base);
186                         outb(chip->entr2, cfg_base);
187                         
188                         /* Select Logical Device 5 Registers (UART2) */
189                         outb(0x07, cfg_base);
190                         outb(0x05, cfg_base+1);
191                         
192                         /* Read Chip Identification Register */
193                         outb(chip->cid_index, cfg_base);        
194                         reg = inb(cfg_base+1);  
195                                 
196                         if (reg == chip->cid_value)
197                         {
198                                 IRDA_DEBUG(2, "%s(), Chip found at 0x%03x\n", __FUNCTION__, cfg_base);
199                                            
200                                 outb(0x1F, cfg_base);
201                                 revision = inb(cfg_base+1);
202                                 IRDA_DEBUG(2, "%s(), Found %s chip, revision=%d\n", __FUNCTION__,
203                                            chip->name, revision);                                       
204                                 
205                                 /* 
206                                  * If the user supplies the base address, then
207                                  * we init the chip, if not we probe the values
208                                  * set by the BIOS
209                                  */                             
210                                 if (io[i] < 2000)
211                                 {
212                                         chip->init(chip, &info);
213                                 }
214                                 else
215                                 {
216                                         chip->probe(chip, &info);       
217                                 }
218                                 
219                                 if (ali_ircc_open(i, &info) == 0)
220                                         ret = 0;
221                                 i++;                            
222                         }
223                         else
224                         {
225                                 IRDA_DEBUG(2, "%s(), No %s chip at 0x%03x\n", __FUNCTION__, chip->name, cfg_base);
226                         }
227                         /* Exit configuration */
228                         outb(0xbb, cfg_base);
229                 }
230         }               
231                 
232         IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__);                                                 
233
234         if (ret)
235                 platform_driver_unregister(&ali_ircc_driver);
236
237         return ret;
238 }
239
240 /*
241  * Function ali_ircc_cleanup ()
242  *
243  *    Close all configured chips
244  *
245  */
246 static void __exit ali_ircc_cleanup(void)
247 {
248         int i;
249
250         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__); 
251
252         for (i=0; i < ARRAY_SIZE(dev_self); i++) {
253                 if (dev_self[i])
254                         ali_ircc_close(dev_self[i]);
255         }
256         
257         platform_driver_unregister(&ali_ircc_driver);
258
259         IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__);
260 }
261
262 /*
263  * Function ali_ircc_open (int i, chipio_t *inf)
264  *
265  *    Open driver instance
266  *
267  */
268 static int ali_ircc_open(int i, chipio_t *info)
269 {
270         struct net_device *dev;
271         struct ali_ircc_cb *self;
272         int dongle_id;
273         int err;
274                         
275         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__); 
276
277         if (i >= ARRAY_SIZE(dev_self)) {
278                 IRDA_ERROR("%s(), maximum number of supported chips reached!\n",
279                            __FUNCTION__);
280                 return -ENOMEM;
281         }
282         
283         /* Set FIR FIFO and DMA Threshold */
284         if ((ali_ircc_setup(info)) == -1)
285                 return -1;
286                 
287         dev = alloc_irdadev(sizeof(*self));
288         if (dev == NULL) {
289                 IRDA_ERROR("%s(), can't allocate memory for control block!\n",
290                            __FUNCTION__);
291                 return -ENOMEM;
292         }
293
294         self = dev->priv;
295         self->netdev = dev;
296         spin_lock_init(&self->lock);
297    
298         /* Need to store self somewhere */
299         dev_self[i] = self;
300         self->index = i;
301
302         /* Initialize IO */
303         self->io.cfg_base  = info->cfg_base;    /* In ali_ircc_probe_53 assign          */
304         self->io.fir_base  = info->fir_base;    /* info->sir_base = info->fir_base      */
305         self->io.sir_base  = info->sir_base;    /* ALi SIR and FIR use the same address */
306         self->io.irq       = info->irq;
307         self->io.fir_ext   = CHIP_IO_EXTENT;
308         self->io.dma       = info->dma;
309         self->io.fifo_size = 16;                /* SIR: 16, FIR: 32 Benjamin 2000/11/1 */
310         
311         /* Reserve the ioports that we need */
312         if (!request_region(self->io.fir_base, self->io.fir_ext,
313                             ALI_IRCC_DRIVER_NAME)) {
314                 IRDA_WARNING("%s(), can't get iobase of 0x%03x\n", __FUNCTION__,
315                         self->io.fir_base);
316                 err = -ENODEV;
317                 goto err_out1;
318         }
319
320         /* Initialize QoS for this device */
321         irda_init_max_qos_capabilies(&self->qos);
322         
323         /* The only value we must override it the baudrate */
324         self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
325                 IR_115200|IR_576000|IR_1152000|(IR_4000000 << 8); // benjamin 2000/11/8 05:27PM
326                         
327         self->qos.min_turn_time.bits = qos_mtt_bits;
328                         
329         irda_qos_bits_to_value(&self->qos);
330         
331         /* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
332         self->rx_buff.truesize = 14384; 
333         self->tx_buff.truesize = 14384;
334
335         /* Allocate memory if needed */
336         self->rx_buff.head =
337                 dma_alloc_coherent(NULL, self->rx_buff.truesize,
338                                    &self->rx_buff_dma, GFP_KERNEL);
339         if (self->rx_buff.head == NULL) {
340                 err = -ENOMEM;
341                 goto err_out2;
342         }
343         memset(self->rx_buff.head, 0, self->rx_buff.truesize);
344         
345         self->tx_buff.head =
346                 dma_alloc_coherent(NULL, self->tx_buff.truesize,
347                                    &self->tx_buff_dma, GFP_KERNEL);
348         if (self->tx_buff.head == NULL) {
349                 err = -ENOMEM;
350                 goto err_out3;
351         }
352         memset(self->tx_buff.head, 0, self->tx_buff.truesize);
353
354         self->rx_buff.in_frame = FALSE;
355         self->rx_buff.state = OUTSIDE_FRAME;
356         self->tx_buff.data = self->tx_buff.head;
357         self->rx_buff.data = self->rx_buff.head;
358         
359         /* Reset Tx queue info */
360         self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
361         self->tx_fifo.tail = self->tx_buff.head;
362
363         
364         /* Keep track of module usage */
365         SET_MODULE_OWNER(dev);
366
367         /* Override the network functions we need to use */
368         dev->hard_start_xmit = ali_ircc_sir_hard_xmit;
369         dev->open            = ali_ircc_net_open;
370         dev->stop            = ali_ircc_net_close;
371         dev->do_ioctl        = ali_ircc_net_ioctl;
372         dev->get_stats       = ali_ircc_net_get_stats;
373
374         err = register_netdev(dev);
375         if (err) {
376                 IRDA_ERROR("%s(), register_netdev() failed!\n", __FUNCTION__);
377                 goto err_out4;
378         }
379         IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);
380
381         /* Check dongle id */
382         dongle_id = ali_ircc_read_dongle_id(i, info);
383         IRDA_MESSAGE("%s(), %s, Found dongle: %s\n", __FUNCTION__,
384                      ALI_IRCC_DRIVER_NAME, dongle_types[dongle_id]);
385                 
386         self->io.dongle_id = dongle_id;
387
388         IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__);
389         
390         return 0;
391
392  err_out4:
393         dma_free_coherent(NULL, self->tx_buff.truesize,
394                           self->tx_buff.head, self->tx_buff_dma);
395  err_out3:
396         dma_free_coherent(NULL, self->rx_buff.truesize,
397                           self->rx_buff.head, self->rx_buff_dma);
398  err_out2:
399         release_region(self->io.fir_base, self->io.fir_ext);
400  err_out1:
401         dev_self[i] = NULL;
402         free_netdev(dev);
403         return err;
404 }
405
406
407 /*
408  * Function ali_ircc_close (self)
409  *
410  *    Close driver instance
411  *
412  */
413 static int __exit ali_ircc_close(struct ali_ircc_cb *self)
414 {
415         int iobase;
416
417         IRDA_DEBUG(4, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
418
419         IRDA_ASSERT(self != NULL, return -1;);
420
421         iobase = self->io.fir_base;
422
423         /* Remove netdevice */
424         unregister_netdev(self->netdev);
425
426         /* Release the PORT that this driver is using */
427         IRDA_DEBUG(4, "%s(), Releasing Region %03x\n", __FUNCTION__, self->io.fir_base);
428         release_region(self->io.fir_base, self->io.fir_ext);
429
430         if (self->tx_buff.head)
431                 dma_free_coherent(NULL, self->tx_buff.truesize,
432                                   self->tx_buff.head, self->tx_buff_dma);
433         
434         if (self->rx_buff.head)
435                 dma_free_coherent(NULL, self->rx_buff.truesize,
436                                   self->rx_buff.head, self->rx_buff_dma);
437
438         dev_self[self->index] = NULL;
439         free_netdev(self->netdev);
440         
441         IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__);
442         
443         return 0;
444 }
445
446 /*
447  * Function ali_ircc_init_43 (chip, info)
448  *
449  *    Initialize the ALi M1543 chip. 
450  */
451 static int ali_ircc_init_43(ali_chip_t *chip, chipio_t *info) 
452 {
453         /* All controller information like I/O address, DMA channel, IRQ
454          * are set by BIOS
455          */
456         
457         return 0;
458 }
459
460 /*
461  * Function ali_ircc_init_53 (chip, info)
462  *
463  *    Initialize the ALi M1535 chip. 
464  */
465 static int ali_ircc_init_53(ali_chip_t *chip, chipio_t *info) 
466 {
467         /* All controller information like I/O address, DMA channel, IRQ
468          * are set by BIOS
469          */
470         
471         return 0;
472 }
473
474 /*
475  * Function ali_ircc_probe_53 (chip, info)
476  *      
477  *      Probes for the ALi M1535D or M1535
478  */
479 static int ali_ircc_probe_53(ali_chip_t *chip, chipio_t *info)
480 {
481         int cfg_base = info->cfg_base;
482         int hi, low, reg;
483         
484         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
485         
486         /* Enter Configuration */
487         outb(chip->entr1, cfg_base);
488         outb(chip->entr2, cfg_base);
489         
490         /* Select Logical Device 5 Registers (UART2) */
491         outb(0x07, cfg_base);
492         outb(0x05, cfg_base+1);
493         
494         /* Read address control register */
495         outb(0x60, cfg_base);
496         hi = inb(cfg_base+1);   
497         outb(0x61, cfg_base);
498         low = inb(cfg_base+1);
499         info->fir_base = (hi<<8) + low;
500         
501         info->sir_base = info->fir_base;
502         
503         IRDA_DEBUG(2, "%s(), probing fir_base=0x%03x\n", __FUNCTION__, info->fir_base);
504                 
505         /* Read IRQ control register */
506         outb(0x70, cfg_base);
507         reg = inb(cfg_base+1);
508         info->irq = reg & 0x0f;
509         IRDA_DEBUG(2, "%s(), probing irq=%d\n", __FUNCTION__, info->irq);
510         
511         /* Read DMA channel */
512         outb(0x74, cfg_base);
513         reg = inb(cfg_base+1);
514         info->dma = reg & 0x07;
515         
516         if(info->dma == 0x04)
517                 IRDA_WARNING("%s(), No DMA channel assigned !\n", __FUNCTION__);
518         else
519                 IRDA_DEBUG(2, "%s(), probing dma=%d\n", __FUNCTION__, info->dma);
520         
521         /* Read Enabled Status */
522         outb(0x30, cfg_base);
523         reg = inb(cfg_base+1);
524         info->enabled = (reg & 0x80) && (reg & 0x01);
525         IRDA_DEBUG(2, "%s(), probing enabled=%d\n", __FUNCTION__, info->enabled);
526         
527         /* Read Power Status */
528         outb(0x22, cfg_base);
529         reg = inb(cfg_base+1);
530         info->suspended = (reg & 0x20);
531         IRDA_DEBUG(2, "%s(), probing suspended=%d\n", __FUNCTION__, info->suspended);
532         
533         /* Exit configuration */
534         outb(0xbb, cfg_base);
535                 
536         IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __FUNCTION__); 
537         
538         return 0;       
539 }
540
541 /*
542  * Function ali_ircc_setup (info)
543  *
544  *      Set FIR FIFO and DMA Threshold
545  *      Returns non-negative on success.
546  *
547  */
548 static int ali_ircc_setup(chipio_t *info)
549 {
550         unsigned char tmp;
551         int version;
552         int iobase = info->fir_base;
553         
554         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
555         
556         /* Locking comments :
557          * Most operations here need to be protected. We are called before
558          * the device instance is created in ali_ircc_open(), therefore 
559          * nobody can bother us - Jean II */
560
561         /* Switch to FIR space */
562         SIR2FIR(iobase);
563         
564         /* Master Reset */
565         outb(0x40, iobase+FIR_MCR); // benjamin 2000/11/30 11:45AM
566         
567         /* Read FIR ID Version Register */
568         switch_bank(iobase, BANK3);
569         version = inb(iobase+FIR_ID_VR);
570         
571         /* Should be 0x00 in the M1535/M1535D */
572         if(version != 0x00)
573         {
574                 IRDA_ERROR("%s, Wrong chip version %02x\n",
575                            ALI_IRCC_DRIVER_NAME, version);
576                 return -1;
577         }
578         
579         /* Set FIR FIFO Threshold Register */
580         switch_bank(iobase, BANK1);
581         outb(RX_FIFO_Threshold, iobase+FIR_FIFO_TR);
582         
583         /* Set FIR DMA Threshold Register */
584         outb(RX_DMA_Threshold, iobase+FIR_DMA_TR);
585         
586         /* CRC enable */
587         switch_bank(iobase, BANK2);
588         outb(inb(iobase+FIR_IRDA_CR) | IRDA_CR_CRC, iobase+FIR_IRDA_CR);
589         
590         /* NDIS driver set TX Length here BANK2 Alias 3, Alias4*/
591         
592         /* Switch to Bank 0 */
593         switch_bank(iobase, BANK0);
594         
595         tmp = inb(iobase+FIR_LCR_B);
596         tmp &=~0x20; // disable SIP
597         tmp |= 0x80; // these two steps make RX mode
598         tmp &= 0xbf;    
599         outb(tmp, iobase+FIR_LCR_B);
600                 
601         /* Disable Interrupt */
602         outb(0x00, iobase+FIR_IER);
603         
604         
605         /* Switch to SIR space */
606         FIR2SIR(iobase);
607         
608         IRDA_MESSAGE("%s, driver loaded (Benjamin Kong)\n",
609                      ALI_IRCC_DRIVER_NAME);
610         
611         /* Enable receive interrupts */ 
612         // outb(UART_IER_RDI, iobase+UART_IER); //benjamin 2000/11/23 01:25PM
613         // Turn on the interrupts in ali_ircc_net_open
614         
615         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__);        
616         
617         return 0;
618 }
619
620 /*
621  * Function ali_ircc_read_dongle_id (int index, info)
622  *
623  * Try to read dongle indentification. This procedure needs to be executed
624  * once after power-on/reset. It also needs to be used whenever you suspect
625  * that the user may have plugged/unplugged the IrDA Dongle.
626  */
627 static int ali_ircc_read_dongle_id (int i, chipio_t *info)
628 {
629         int dongle_id, reg;
630         int cfg_base = info->cfg_base;
631         
632         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
633                 
634         /* Enter Configuration */
635         outb(chips[i].entr1, cfg_base);
636         outb(chips[i].entr2, cfg_base);
637         
638         /* Select Logical Device 5 Registers (UART2) */
639         outb(0x07, cfg_base);
640         outb(0x05, cfg_base+1);
641         
642         /* Read Dongle ID */
643         outb(0xf0, cfg_base);
644         reg = inb(cfg_base+1);  
645         dongle_id = ((reg>>6)&0x02) | ((reg>>5)&0x01);
646         IRDA_DEBUG(2, "%s(), probing dongle_id=%d, dongle_types=%s\n", __FUNCTION__, 
647                 dongle_id, dongle_types[dongle_id]);
648         
649         /* Exit configuration */
650         outb(0xbb, cfg_base);
651                         
652         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__);        
653         
654         return dongle_id;
655 }
656
657 /*
658  * Function ali_ircc_interrupt (irq, dev_id, regs)
659  *
660  *    An interrupt from the chip has arrived. Time to do some work
661  *
662  */
663 static irqreturn_t ali_ircc_interrupt(int irq, void *dev_id)
664 {
665         struct net_device *dev = dev_id;
666         struct ali_ircc_cb *self;
667         int ret;
668                 
669         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
670                 
671         self = dev->priv;
672         
673         spin_lock(&self->lock);
674         
675         /* Dispatch interrupt handler for the current speed */
676         if (self->io.speed > 115200)
677                 ret = ali_ircc_fir_interrupt(self);
678         else
679                 ret = ali_ircc_sir_interrupt(self);
680                 
681         spin_unlock(&self->lock);
682         
683         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__);
684         return ret;
685 }
686 /*
687  * Function ali_ircc_fir_interrupt(irq, struct ali_ircc_cb *self)
688  *
689  *    Handle MIR/FIR interrupt
690  *
691  */
692 static irqreturn_t ali_ircc_fir_interrupt(struct ali_ircc_cb *self)
693 {
694         __u8 eir, OldMessageCount;
695         int iobase, tmp;
696         
697         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
698         
699         iobase = self->io.fir_base;
700         
701         switch_bank(iobase, BANK0);     
702         self->InterruptID = inb(iobase+FIR_IIR);                
703         self->BusStatus = inb(iobase+FIR_BSR);  
704         
705         OldMessageCount = (self->LineStatus + 1) & 0x07;
706         self->LineStatus = inb(iobase+FIR_LSR); 
707         //self->ier = inb(iobase+FIR_IER);              2000/12/1 04:32PM
708         eir = self->InterruptID & self->ier; /* Mask out the interesting ones */ 
709         
710         IRDA_DEBUG(1, "%s(), self->InterruptID = %x\n", __FUNCTION__,self->InterruptID);
711         IRDA_DEBUG(1, "%s(), self->LineStatus = %x\n", __FUNCTION__,self->LineStatus);
712         IRDA_DEBUG(1, "%s(), self->ier = %x\n", __FUNCTION__,self->ier);
713         IRDA_DEBUG(1, "%s(), eir = %x\n", __FUNCTION__,eir);
714         
715         /* Disable interrupts */
716          SetCOMInterrupts(self, FALSE);
717         
718         /* Tx or Rx Interrupt */
719         
720         if (eir & IIR_EOM) 
721         {               
722                 if (self->io.direction == IO_XMIT) /* TX */
723                 {
724                         IRDA_DEBUG(1, "%s(), ******* IIR_EOM (Tx) *******\n", __FUNCTION__);
725                         
726                         if(ali_ircc_dma_xmit_complete(self))
727                         {
728                                 if (irda_device_txqueue_empty(self->netdev)) 
729                                 {
730                                         /* Prepare for receive */
731                                         ali_ircc_dma_receive(self);                                     
732                                         self->ier = IER_EOM;                                                                    
733                                 }
734                         }
735                         else
736                         {
737                                 self->ier = IER_EOM;                                    
738                         }
739                                                                         
740                 }       
741                 else /* RX */
742                 {
743                         IRDA_DEBUG(1, "%s(), ******* IIR_EOM (Rx) *******\n", __FUNCTION__);
744                         
745                         if(OldMessageCount > ((self->LineStatus+1) & 0x07))
746                         {
747                                 self->rcvFramesOverflow = TRUE; 
748                                 IRDA_DEBUG(1, "%s(), ******* self->rcvFramesOverflow = TRUE ******** \n", __FUNCTION__);
749                         }
750                                                 
751                         if (ali_ircc_dma_receive_complete(self))
752                         {
753                                 IRDA_DEBUG(1, "%s(), ******* receive complete ******** \n", __FUNCTION__);
754                                 
755                                 self->ier = IER_EOM;                            
756                         }
757                         else
758                         {
759                                 IRDA_DEBUG(1, "%s(), ******* Not receive complete ******** \n", __FUNCTION__);
760                                 
761                                 self->ier = IER_EOM | IER_TIMER;                                                                
762                         }       
763                 
764                 }               
765         }
766         /* Timer Interrupt */
767         else if (eir & IIR_TIMER)
768         {       
769                 if(OldMessageCount > ((self->LineStatus+1) & 0x07))
770                 {
771                         self->rcvFramesOverflow = TRUE; 
772                         IRDA_DEBUG(1, "%s(), ******* self->rcvFramesOverflow = TRUE ******* \n", __FUNCTION__);
773                 }
774                 /* Disable Timer */
775                 switch_bank(iobase, BANK1);
776                 tmp = inb(iobase+FIR_CR);
777                 outb( tmp& ~CR_TIMER_EN, iobase+FIR_CR);
778                 
779                 /* Check if this is a Tx timer interrupt */
780                 if (self->io.direction == IO_XMIT)
781                 {
782                         ali_ircc_dma_xmit(self);
783                         
784                         /* Interrupt on EOM */
785                         self->ier = IER_EOM;
786                                                                         
787                 }
788                 else /* Rx */
789                 {
790                         if(ali_ircc_dma_receive_complete(self)) 
791                         {
792                                 self->ier = IER_EOM;
793                         }
794                         else
795                         {
796                                 self->ier = IER_EOM | IER_TIMER;
797                         }       
798                 }               
799         }
800         
801         /* Restore Interrupt */ 
802         SetCOMInterrupts(self, TRUE);   
803                 
804         IRDA_DEBUG(1, "%s(), ----------------- End ---------------\n", __FUNCTION__);
805         return IRQ_RETVAL(eir);
806 }
807
808 /*
809  * Function ali_ircc_sir_interrupt (irq, self, eir)
810  *
811  *    Handle SIR interrupt
812  *
813  */
814 static irqreturn_t ali_ircc_sir_interrupt(struct ali_ircc_cb *self)
815 {
816         int iobase;
817         int iir, lsr;
818         
819         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
820         
821         iobase = self->io.sir_base;
822
823         iir = inb(iobase+UART_IIR) & UART_IIR_ID;
824         if (iir) {      
825                 /* Clear interrupt */
826                 lsr = inb(iobase+UART_LSR);
827
828                 IRDA_DEBUG(4, "%s(), iir=%02x, lsr=%02x, iobase=%#x\n", __FUNCTION__, 
829                            iir, lsr, iobase);
830
831                 switch (iir) 
832                 {
833                         case UART_IIR_RLSI:
834                                 IRDA_DEBUG(2, "%s(), RLSI\n", __FUNCTION__);
835                                 break;
836                         case UART_IIR_RDI:
837                                 /* Receive interrupt */
838                                 ali_ircc_sir_receive(self);
839                                 break;
840                         case UART_IIR_THRI:
841                                 if (lsr & UART_LSR_THRE)
842                                 {
843                                         /* Transmitter ready for data */
844                                         ali_ircc_sir_write_wakeup(self);                                
845                                 }                               
846                                 break;
847                         default:
848                                 IRDA_DEBUG(0, "%s(), unhandled IIR=%#x\n", __FUNCTION__, iir);
849                                 break;
850                 } 
851                 
852         }
853         
854         
855         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__);        
856
857         return IRQ_RETVAL(iir);
858 }
859
860
861 /*
862  * Function ali_ircc_sir_receive (self)
863  *
864  *    Receive one frame from the infrared port
865  *
866  */
867 static void ali_ircc_sir_receive(struct ali_ircc_cb *self) 
868 {
869         int boguscount = 0;
870         int iobase;
871         
872         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__);
873         IRDA_ASSERT(self != NULL, return;);
874
875         iobase = self->io.sir_base;
876
877         /*  
878          * Receive all characters in Rx FIFO, unwrap and unstuff them. 
879          * async_unwrap_char will deliver all found frames  
880          */
881         do {
882                 async_unwrap_char(self->netdev, &self->stats, &self->rx_buff, 
883                                   inb(iobase+UART_RX));
884
885                 /* Make sure we don't stay here too long */
886                 if (boguscount++ > 32) {
887                         IRDA_DEBUG(2,"%s(), breaking!\n", __FUNCTION__);
888                         break;
889                 }
890         } while (inb(iobase+UART_LSR) & UART_LSR_DR);   
891         
892         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
893 }
894
895 /*
896  * Function ali_ircc_sir_write_wakeup (tty)
897  *
898  *    Called by the driver when there's room for more data.  If we have
899  *    more packets to send, we send them here.
900  *
901  */
902 static void ali_ircc_sir_write_wakeup(struct ali_ircc_cb *self)
903 {
904         int actual = 0;
905         int iobase;     
906
907         IRDA_ASSERT(self != NULL, return;);
908
909         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
910         
911         iobase = self->io.sir_base;
912
913         /* Finished with frame?  */
914         if (self->tx_buff.len > 0)  
915         {
916                 /* Write data left in transmit buffer */
917                 actual = ali_ircc_sir_write(iobase, self->io.fifo_size, 
918                                       self->tx_buff.data, self->tx_buff.len);
919                 self->tx_buff.data += actual;
920                 self->tx_buff.len  -= actual;
921         } 
922         else 
923         {
924                 if (self->new_speed) 
925                 {
926                         /* We must wait until all data are gone */
927                         while(!(inb(iobase+UART_LSR) & UART_LSR_TEMT))
928                                 IRDA_DEBUG(1, "%s(), UART_LSR_THRE\n", __FUNCTION__ );
929                         
930                         IRDA_DEBUG(1, "%s(), Changing speed! self->new_speed = %d\n", __FUNCTION__ , self->new_speed);
931                         ali_ircc_change_speed(self, self->new_speed);
932                         self->new_speed = 0;                    
933                         
934                         // benjamin 2000/11/10 06:32PM
935                         if (self->io.speed > 115200)
936                         {
937                                 IRDA_DEBUG(2, "%s(), ali_ircc_change_speed from UART_LSR_TEMT \n", __FUNCTION__ );                              
938                                         
939                                 self->ier = IER_EOM;
940                                 // SetCOMInterrupts(self, TRUE);                                                        
941                                 return;                                                 
942                         }
943                 }
944                 else
945                 {
946                         netif_wake_queue(self->netdev); 
947                 }
948                         
949                 self->stats.tx_packets++;
950                 
951                 /* Turn on receive interrupts */
952                 outb(UART_IER_RDI, iobase+UART_IER);
953         }
954                 
955         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
956 }
957
958 static void ali_ircc_change_speed(struct ali_ircc_cb *self, __u32 baud)
959 {
960         struct net_device *dev = self->netdev;
961         int iobase;
962         
963         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
964         
965         IRDA_DEBUG(2, "%s(), setting speed = %d \n", __FUNCTION__ , baud);
966         
967         /* This function *must* be called with irq off and spin-lock.
968          * - Jean II */
969
970         iobase = self->io.fir_base;
971         
972         SetCOMInterrupts(self, FALSE); // 2000/11/24 11:43AM
973         
974         /* Go to MIR, FIR Speed */
975         if (baud > 115200)
976         {
977                 
978                                         
979                 ali_ircc_fir_change_speed(self, baud);                  
980                 
981                 /* Install FIR xmit handler*/
982                 dev->hard_start_xmit = ali_ircc_fir_hard_xmit;          
983                                 
984                 /* Enable Interuupt */
985                 self->ier = IER_EOM; // benjamin 2000/11/20 07:24PM                                     
986                                 
987                 /* Be ready for incomming frames */
988                 ali_ircc_dma_receive(self);     // benajmin 2000/11/8 07:46PM not complete
989         }       
990         /* Go to SIR Speed */
991         else
992         {
993                 ali_ircc_sir_change_speed(self, baud);
994                                 
995                 /* Install SIR xmit handler*/
996                 dev->hard_start_xmit = ali_ircc_sir_hard_xmit;
997         }
998         
999                 
1000         SetCOMInterrupts(self, TRUE);   // 2000/11/24 11:43AM
1001                 
1002         netif_wake_queue(self->netdev); 
1003         
1004         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
1005 }
1006
1007 static void ali_ircc_fir_change_speed(struct ali_ircc_cb *priv, __u32 baud)
1008 {
1009                 
1010         int iobase; 
1011         struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
1012         struct net_device *dev;
1013
1014         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1015                 
1016         IRDA_ASSERT(self != NULL, return;);
1017
1018         dev = self->netdev;
1019         iobase = self->io.fir_base;
1020         
1021         IRDA_DEBUG(1, "%s(), self->io.speed = %d, change to speed = %d\n", __FUNCTION__ ,self->io.speed,baud);
1022         
1023         /* Come from SIR speed */
1024         if(self->io.speed <=115200)
1025         {
1026                 SIR2FIR(iobase);
1027         }
1028                 
1029         /* Update accounting for new speed */
1030         self->io.speed = baud;
1031                 
1032         // Set Dongle Speed mode
1033         ali_ircc_change_dongle_speed(self, baud);
1034                 
1035         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
1036 }
1037
1038 /*
1039  * Function ali_sir_change_speed (self, speed)
1040  *
1041  *    Set speed of IrDA port to specified baudrate
1042  *
1043  */
1044 static void ali_ircc_sir_change_speed(struct ali_ircc_cb *priv, __u32 speed)
1045 {
1046         struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
1047         unsigned long flags;
1048         int iobase; 
1049         int fcr;    /* FIFO control reg */
1050         int lcr;    /* Line control reg */
1051         int divisor;
1052
1053         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1054         
1055         IRDA_DEBUG(1, "%s(), Setting speed to: %d\n", __FUNCTION__ , speed);
1056
1057         IRDA_ASSERT(self != NULL, return;);
1058
1059         iobase = self->io.sir_base;
1060         
1061         /* Come from MIR or FIR speed */
1062         if(self->io.speed >115200)
1063         {       
1064                 // Set Dongle Speed mode first
1065                 ali_ircc_change_dongle_speed(self, speed);
1066                         
1067                 FIR2SIR(iobase);
1068         }
1069                 
1070         // Clear Line and Auxiluary status registers 2000/11/24 11:47AM
1071                 
1072         inb(iobase+UART_LSR);
1073         inb(iobase+UART_SCR);
1074                 
1075         /* Update accounting for new speed */
1076         self->io.speed = speed;
1077
1078         spin_lock_irqsave(&self->lock, flags);
1079
1080         divisor = 115200/speed;
1081         
1082         fcr = UART_FCR_ENABLE_FIFO;
1083
1084         /* 
1085          * Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and
1086          * almost 1,7 ms at 19200 bps. At speeds above that we can just forget
1087          * about this timeout since it will always be fast enough. 
1088          */
1089         if (self->io.speed < 38400)
1090                 fcr |= UART_FCR_TRIGGER_1;
1091         else 
1092                 fcr |= UART_FCR_TRIGGER_14;
1093         
1094         /* IrDA ports use 8N1 */
1095         lcr = UART_LCR_WLEN8;
1096         
1097         outb(UART_LCR_DLAB | lcr, iobase+UART_LCR); /* Set DLAB */
1098         outb(divisor & 0xff,      iobase+UART_DLL); /* Set speed */
1099         outb(divisor >> 8,        iobase+UART_DLM);
1100         outb(lcr,                 iobase+UART_LCR); /* Set 8N1  */
1101         outb(fcr,                 iobase+UART_FCR); /* Enable FIFO's */
1102
1103         /* without this, the conection will be broken after come back from FIR speed,
1104            but with this, the SIR connection is harder to established */
1105         outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase+UART_MCR);
1106         
1107         spin_unlock_irqrestore(&self->lock, flags);
1108         
1109         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
1110 }
1111
1112 static void ali_ircc_change_dongle_speed(struct ali_ircc_cb *priv, int speed)
1113 {
1114         
1115         struct ali_ircc_cb *self = (struct ali_ircc_cb *) priv;
1116         int iobase,dongle_id;
1117         int tmp = 0;
1118                         
1119         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );        
1120         
1121         iobase = self->io.fir_base;     /* or iobase = self->io.sir_base; */
1122         dongle_id = self->io.dongle_id;
1123         
1124         /* We are already locked, no need to do it again */
1125                 
1126         IRDA_DEBUG(1, "%s(), Set Speed for %s , Speed = %d\n", __FUNCTION__ , dongle_types[dongle_id], speed);          
1127         
1128         switch_bank(iobase, BANK2);
1129         tmp = inb(iobase+FIR_IRDA_CR);
1130                 
1131         /* IBM type dongle */
1132         if(dongle_id == 0)
1133         {                               
1134                 if(speed == 4000000)
1135                 {
1136                         //            __ __     
1137                         // SD/MODE __|     |__ __
1138                         //               __ __ 
1139                         // IRTX    __ __|     |__
1140                         //         T1 T2 T3 T4 T5
1141                         
1142                         tmp &=  ~IRDA_CR_HDLC;          // HDLC=0
1143                         tmp |= IRDA_CR_CRC;             // CRC=1
1144                         
1145                         switch_bank(iobase, BANK2);
1146                         outb(tmp, iobase+FIR_IRDA_CR);
1147                         
1148                         // T1 -> SD/MODE:0 IRTX:0
1149                         tmp &= ~0x09;
1150                         tmp |= 0x02;
1151                         outb(tmp, iobase+FIR_IRDA_CR);
1152                         udelay(2);
1153                         
1154                         // T2 -> SD/MODE:1 IRTX:0
1155                         tmp &= ~0x01;
1156                         tmp |= 0x0a;
1157                         outb(tmp, iobase+FIR_IRDA_CR);
1158                         udelay(2);
1159                         
1160                         // T3 -> SD/MODE:1 IRTX:1
1161                         tmp |= 0x0b;
1162                         outb(tmp, iobase+FIR_IRDA_CR);
1163                         udelay(2);
1164                         
1165                         // T4 -> SD/MODE:0 IRTX:1
1166                         tmp &= ~0x08;
1167                         tmp |= 0x03;
1168                         outb(tmp, iobase+FIR_IRDA_CR);
1169                         udelay(2);
1170                         
1171                         // T5 -> SD/MODE:0 IRTX:0
1172                         tmp &= ~0x09;
1173                         tmp |= 0x02;
1174                         outb(tmp, iobase+FIR_IRDA_CR);
1175                         udelay(2);
1176                         
1177                         // reset -> Normal TX output Signal
1178                         outb(tmp & ~0x02, iobase+FIR_IRDA_CR);                          
1179                 }
1180                 else /* speed <=1152000 */
1181                 {       
1182                         //            __        
1183                         // SD/MODE __|  |__
1184                         //
1185                         // IRTX    ________
1186                         //         T1 T2 T3  
1187                         
1188                         /* MIR 115200, 57600 */
1189                         if (speed==1152000)
1190                         {
1191                                 tmp |= 0xA0;       //HDLC=1, 1.152Mbps=1
1192                         }
1193                         else
1194                         {
1195                                 tmp &=~0x80;       //HDLC 0.576Mbps
1196                                 tmp |= 0x20;       //HDLC=1,
1197                         }                       
1198                         
1199                         tmp |= IRDA_CR_CRC;             // CRC=1
1200                         
1201                         switch_bank(iobase, BANK2);
1202                         outb(tmp, iobase+FIR_IRDA_CR);
1203                                                 
1204                         /* MIR 115200, 57600 */ 
1205                                                 
1206                         //switch_bank(iobase, BANK2);                   
1207                         // T1 -> SD/MODE:0 IRTX:0
1208                         tmp &= ~0x09;
1209                         tmp |= 0x02;
1210                         outb(tmp, iobase+FIR_IRDA_CR);
1211                         udelay(2);
1212                         
1213                         // T2 -> SD/MODE:1 IRTX:0
1214                         tmp &= ~0x01;     
1215                         tmp |= 0x0a;      
1216                         outb(tmp, iobase+FIR_IRDA_CR);
1217                         
1218                         // T3 -> SD/MODE:0 IRTX:0
1219                         tmp &= ~0x09;
1220                         tmp |= 0x02;
1221                         outb(tmp, iobase+FIR_IRDA_CR);
1222                         udelay(2);
1223                         
1224                         // reset -> Normal TX output Signal
1225                         outb(tmp & ~0x02, iobase+FIR_IRDA_CR);                                                  
1226                 }               
1227         }
1228         else if (dongle_id == 1) /* HP HDSL-3600 */
1229         {
1230                 switch(speed)
1231                 {
1232                 case 4000000:
1233                         tmp &=  ~IRDA_CR_HDLC;  // HDLC=0
1234                         break;  
1235                         
1236                 case 1152000:
1237                         tmp |= 0xA0;            // HDLC=1, 1.152Mbps=1
1238                         break;
1239                         
1240                 case 576000:
1241                         tmp &=~0x80;            // HDLC 0.576Mbps
1242                         tmp |= 0x20;            // HDLC=1,
1243                         break;
1244                 }                       
1245                         
1246                 tmp |= IRDA_CR_CRC;             // CRC=1
1247                         
1248                 switch_bank(iobase, BANK2);
1249                 outb(tmp, iobase+FIR_IRDA_CR);          
1250         }
1251         else /* HP HDSL-1100 */
1252         {
1253                 if(speed <= 115200) /* SIR */
1254                 {
1255                         
1256                         tmp &= ~IRDA_CR_FIR_SIN;        // HP sin select = 0
1257                         
1258                         switch_bank(iobase, BANK2);
1259                         outb(tmp, iobase+FIR_IRDA_CR);                  
1260                 }
1261                 else /* MIR FIR */
1262                 {       
1263                         
1264                         switch(speed)
1265                         {
1266                         case 4000000:
1267                                 tmp &=  ~IRDA_CR_HDLC;  // HDLC=0
1268                                 break;  
1269                         
1270                         case 1152000:
1271                                 tmp |= 0xA0;            // HDLC=1, 1.152Mbps=1
1272                                 break;
1273                         
1274                         case 576000:
1275                                 tmp &=~0x80;            // HDLC 0.576Mbps
1276                                 tmp |= 0x20;            // HDLC=1,
1277                                 break;
1278                         }                       
1279                         
1280                         tmp |= IRDA_CR_CRC;             // CRC=1
1281                         tmp |= IRDA_CR_FIR_SIN;         // HP sin select = 1
1282                         
1283                         switch_bank(iobase, BANK2);
1284                         outb(tmp, iobase+FIR_IRDA_CR);                  
1285                 }
1286         }
1287                         
1288         switch_bank(iobase, BANK0);
1289         
1290         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );               
1291 }
1292
1293 /*
1294  * Function ali_ircc_sir_write (driver)
1295  *
1296  *    Fill Tx FIFO with transmit data
1297  *
1298  */
1299 static int ali_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len)
1300 {
1301         int actual = 0;
1302         
1303         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1304                 
1305         /* Tx FIFO should be empty! */
1306         if (!(inb(iobase+UART_LSR) & UART_LSR_THRE)) {
1307                 IRDA_DEBUG(0, "%s(), failed, fifo not empty!\n", __FUNCTION__ );
1308                 return 0;
1309         }
1310         
1311         /* Fill FIFO with current frame */
1312         while ((fifo_size-- > 0) && (actual < len)) {
1313                 /* Transmit next byte */
1314                 outb(buf[actual], iobase+UART_TX);
1315
1316                 actual++;
1317         }
1318         
1319         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
1320         return actual;
1321 }
1322
1323 /*
1324  * Function ali_ircc_net_open (dev)
1325  *
1326  *    Start the device
1327  *
1328  */
1329 static int ali_ircc_net_open(struct net_device *dev)
1330 {
1331         struct ali_ircc_cb *self;
1332         int iobase;
1333         char hwname[32];
1334                 
1335         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1336         
1337         IRDA_ASSERT(dev != NULL, return -1;);
1338         
1339         self = (struct ali_ircc_cb *) dev->priv;
1340         
1341         IRDA_ASSERT(self != NULL, return 0;);
1342         
1343         iobase = self->io.fir_base;
1344         
1345         /* Request IRQ and install Interrupt Handler */
1346         if (request_irq(self->io.irq, ali_ircc_interrupt, 0, dev->name, dev)) 
1347         {
1348                 IRDA_WARNING("%s, unable to allocate irq=%d\n",
1349                              ALI_IRCC_DRIVER_NAME,
1350                              self->io.irq);
1351                 return -EAGAIN;
1352         }
1353         
1354         /*
1355          * Always allocate the DMA channel after the IRQ, and clean up on 
1356          * failure.
1357          */
1358         if (request_dma(self->io.dma, dev->name)) {
1359                 IRDA_WARNING("%s, unable to allocate dma=%d\n",
1360                              ALI_IRCC_DRIVER_NAME,
1361                              self->io.dma);
1362                 free_irq(self->io.irq, self);
1363                 return -EAGAIN;
1364         }
1365         
1366         /* Turn on interrups */
1367         outb(UART_IER_RDI , iobase+UART_IER);
1368
1369         /* Ready to play! */
1370         netif_start_queue(dev); //benjamin by irport
1371         
1372         /* Give self a hardware name */
1373         sprintf(hwname, "ALI-FIR @ 0x%03x", self->io.fir_base);
1374
1375         /* 
1376          * Open new IrLAP layer instance, now that everything should be
1377          * initialized properly 
1378          */
1379         self->irlap = irlap_open(dev, &self->qos, hwname);
1380                 
1381         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
1382         
1383         return 0;
1384 }
1385
1386 /*
1387  * Function ali_ircc_net_close (dev)
1388  *
1389  *    Stop the device
1390  *
1391  */
1392 static int ali_ircc_net_close(struct net_device *dev)
1393 {       
1394
1395         struct ali_ircc_cb *self;
1396         //int iobase;
1397                         
1398         IRDA_DEBUG(4, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1399                 
1400         IRDA_ASSERT(dev != NULL, return -1;);
1401
1402         self = (struct ali_ircc_cb *) dev->priv;
1403         IRDA_ASSERT(self != NULL, return 0;);
1404
1405         /* Stop device */
1406         netif_stop_queue(dev);
1407         
1408         /* Stop and remove instance of IrLAP */
1409         if (self->irlap)
1410                 irlap_close(self->irlap);
1411         self->irlap = NULL;
1412                 
1413         disable_dma(self->io.dma);
1414
1415         /* Disable interrupts */
1416         SetCOMInterrupts(self, FALSE);
1417                
1418         free_irq(self->io.irq, dev);
1419         free_dma(self->io.dma);
1420
1421         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
1422         
1423         return 0;
1424 }
1425
1426 /*
1427  * Function ali_ircc_fir_hard_xmit (skb, dev)
1428  *
1429  *    Transmit the frame
1430  *
1431  */
1432 static int ali_ircc_fir_hard_xmit(struct sk_buff *skb, struct net_device *dev)
1433 {
1434         struct ali_ircc_cb *self;
1435         unsigned long flags;
1436         int iobase;
1437         __u32 speed;
1438         int mtt, diff;
1439         
1440         IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );       
1441         
1442         self = (struct ali_ircc_cb *) dev->priv;
1443         iobase = self->io.fir_base;
1444
1445         netif_stop_queue(dev);
1446         
1447         /* Make sure tests *& speed change are atomic */
1448         spin_lock_irqsave(&self->lock, flags);
1449         
1450         /* Note : you should make sure that speed changes are not going
1451          * to corrupt any outgoing frame. Look at nsc-ircc for the gory
1452          * details - Jean II */
1453
1454         /* Check if we need to change the speed */
1455         speed = irda_get_next_speed(skb);
1456         if ((speed != self->io.speed) && (speed != -1)) {
1457                 /* Check for empty frame */
1458                 if (!skb->len) {
1459                         ali_ircc_change_speed(self, speed); 
1460                         dev->trans_start = jiffies;
1461                         spin_unlock_irqrestore(&self->lock, flags);
1462                         dev_kfree_skb(skb);
1463                         return 0;
1464                 } else
1465                         self->new_speed = speed;
1466         }
1467
1468         /* Register and copy this frame to DMA memory */
1469         self->tx_fifo.queue[self->tx_fifo.free].start = self->tx_fifo.tail;
1470         self->tx_fifo.queue[self->tx_fifo.free].len = skb->len;
1471         self->tx_fifo.tail += skb->len;
1472
1473         self->stats.tx_bytes += skb->len;
1474
1475         skb_copy_from_linear_data(skb, self->tx_fifo.queue[self->tx_fifo.free].start,
1476                       skb->len);
1477         self->tx_fifo.len++;
1478         self->tx_fifo.free++;
1479
1480         /* Start transmit only if there is currently no transmit going on */
1481         if (self->tx_fifo.len == 1) 
1482         {
1483                 /* Check if we must wait the min turn time or not */
1484                 mtt = irda_get_mtt(skb);
1485                                 
1486                 if (mtt) 
1487                 {
1488                         /* Check how much time we have used already */
1489                         do_gettimeofday(&self->now);
1490                         
1491                         diff = self->now.tv_usec - self->stamp.tv_usec;
1492                         /* self->stamp is set from ali_ircc_dma_receive_complete() */
1493                                                         
1494                         IRDA_DEBUG(1, "%s(), ******* diff = %d ******* \n", __FUNCTION__ , diff);       
1495                         
1496                         if (diff < 0) 
1497                                 diff += 1000000;
1498                         
1499                         /* Check if the mtt is larger than the time we have
1500                          * already used by all the protocol processing
1501                          */
1502                         if (mtt > diff)
1503                         {                               
1504                                 mtt -= diff;
1505                                                                 
1506                                 /* 
1507                                  * Use timer if delay larger than 1000 us, and
1508                                  * use udelay for smaller values which should
1509                                  * be acceptable
1510                                  */
1511                                 if (mtt > 500) 
1512                                 {
1513                                         /* Adjust for timer resolution */
1514                                         mtt = (mtt+250) / 500;  /* 4 discard, 5 get advanced, Let's round off */
1515                                         
1516                                         IRDA_DEBUG(1, "%s(), ************** mtt = %d ***********\n", __FUNCTION__ , mtt);       
1517                                         
1518                                         /* Setup timer */
1519                                         if (mtt == 1) /* 500 us */
1520                                         {
1521                                                 switch_bank(iobase, BANK1);
1522                                                 outb(TIMER_IIR_500, iobase+FIR_TIMER_IIR);
1523                                         }       
1524                                         else if (mtt == 2) /* 1 ms */
1525                                         {
1526                                                 switch_bank(iobase, BANK1);
1527                                                 outb(TIMER_IIR_1ms, iobase+FIR_TIMER_IIR);
1528                                         }                                       
1529                                         else /* > 2ms -> 4ms */
1530                                         {
1531                                                 switch_bank(iobase, BANK1);
1532                                                 outb(TIMER_IIR_2ms, iobase+FIR_TIMER_IIR);
1533                                         }
1534                                         
1535                                         
1536                                         /* Start timer */
1537                                         outb(inb(iobase+FIR_CR) | CR_TIMER_EN, iobase+FIR_CR);
1538                                         self->io.direction = IO_XMIT;
1539                                         
1540                                         /* Enable timer interrupt */
1541                                         self->ier = IER_TIMER;
1542                                         SetCOMInterrupts(self, TRUE);                                   
1543                                         
1544                                         /* Timer will take care of the rest */
1545                                         goto out; 
1546                                 } 
1547                                 else
1548                                         udelay(mtt);
1549                         } // if (if (mtt > diff)
1550                 }// if (mtt) 
1551                                 
1552                 /* Enable EOM interrupt */
1553                 self->ier = IER_EOM;
1554                 SetCOMInterrupts(self, TRUE);
1555                 
1556                 /* Transmit frame */
1557                 ali_ircc_dma_xmit(self);
1558         } // if (self->tx_fifo.len == 1) 
1559         
1560  out:
1561         
1562         /* Not busy transmitting anymore if window is not full */
1563         if (self->tx_fifo.free < MAX_TX_WINDOW)
1564                 netif_wake_queue(self->netdev);
1565         
1566         /* Restore bank register */
1567         switch_bank(iobase, BANK0);
1568
1569         dev->trans_start = jiffies;
1570         spin_unlock_irqrestore(&self->lock, flags);
1571         dev_kfree_skb(skb);
1572
1573         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
1574         return 0;       
1575 }
1576
1577
1578 static void ali_ircc_dma_xmit(struct ali_ircc_cb *self)
1579 {
1580         int iobase, tmp;
1581         unsigned char FIFO_OPTI, Hi, Lo;
1582         
1583         
1584         IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );       
1585         
1586         iobase = self->io.fir_base;
1587         
1588         /* FIFO threshold , this method comes from NDIS5 code */
1589         
1590         if(self->tx_fifo.queue[self->tx_fifo.ptr].len < TX_FIFO_Threshold)
1591                 FIFO_OPTI = self->tx_fifo.queue[self->tx_fifo.ptr].len-1;
1592         else
1593                 FIFO_OPTI = TX_FIFO_Threshold;
1594         
1595         /* Disable DMA */
1596         switch_bank(iobase, BANK1);
1597         outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1598         
1599         self->io.direction = IO_XMIT;
1600         
1601         irda_setup_dma(self->io.dma, 
1602                        ((u8 *)self->tx_fifo.queue[self->tx_fifo.ptr].start -
1603                         self->tx_buff.head) + self->tx_buff_dma,
1604                        self->tx_fifo.queue[self->tx_fifo.ptr].len, 
1605                        DMA_TX_MODE);
1606                 
1607         /* Reset Tx FIFO */
1608         switch_bank(iobase, BANK0);
1609         outb(LCR_A_FIFO_RESET, iobase+FIR_LCR_A);
1610         
1611         /* Set Tx FIFO threshold */
1612         if (self->fifo_opti_buf!=FIFO_OPTI) 
1613         {
1614                 switch_bank(iobase, BANK1);
1615                 outb(FIFO_OPTI, iobase+FIR_FIFO_TR) ;
1616                 self->fifo_opti_buf=FIFO_OPTI;
1617         }
1618         
1619         /* Set Tx DMA threshold */
1620         switch_bank(iobase, BANK1);
1621         outb(TX_DMA_Threshold, iobase+FIR_DMA_TR);
1622         
1623         /* Set max Tx frame size */
1624         Hi = (self->tx_fifo.queue[self->tx_fifo.ptr].len >> 8) & 0x0f;
1625         Lo = self->tx_fifo.queue[self->tx_fifo.ptr].len & 0xff;
1626         switch_bank(iobase, BANK2);
1627         outb(Hi, iobase+FIR_TX_DSR_HI);
1628         outb(Lo, iobase+FIR_TX_DSR_LO);
1629         
1630         /* Disable SIP , Disable Brick Wall (we don't support in TX mode), Change to TX mode */
1631         switch_bank(iobase, BANK0);     
1632         tmp = inb(iobase+FIR_LCR_B);
1633         tmp &= ~0x20; // Disable SIP
1634         outb(((unsigned char)(tmp & 0x3f) | LCR_B_TX_MODE) & ~LCR_B_BW, iobase+FIR_LCR_B);
1635         IRDA_DEBUG(1, "%s(), ******* Change to TX mode: FIR_LCR_B = 0x%x ******* \n", __FUNCTION__ , inb(iobase+FIR_LCR_B));
1636         
1637         outb(0, iobase+FIR_LSR);
1638                         
1639         /* Enable DMA and Burst Mode */
1640         switch_bank(iobase, BANK1);
1641         outb(inb(iobase+FIR_CR) | CR_DMA_EN | CR_DMA_BURST, iobase+FIR_CR);
1642         
1643         switch_bank(iobase, BANK0); 
1644         
1645         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
1646 }
1647
1648 static int  ali_ircc_dma_xmit_complete(struct ali_ircc_cb *self)
1649 {
1650         int iobase;
1651         int ret = TRUE;
1652         
1653         IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );       
1654         
1655         iobase = self->io.fir_base;
1656         
1657         /* Disable DMA */
1658         switch_bank(iobase, BANK1);
1659         outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1660         
1661         /* Check for underrun! */
1662         switch_bank(iobase, BANK0);
1663         if((inb(iobase+FIR_LSR) & LSR_FRAME_ABORT) == LSR_FRAME_ABORT)
1664         
1665         {
1666                 IRDA_ERROR("%s(), ********* LSR_FRAME_ABORT *********\n", __FUNCTION__);        
1667                 self->stats.tx_errors++;
1668                 self->stats.tx_fifo_errors++;           
1669         }
1670         else 
1671         {
1672                 self->stats.tx_packets++;
1673         }
1674
1675         /* Check if we need to change the speed */
1676         if (self->new_speed) 
1677         {
1678                 ali_ircc_change_speed(self, self->new_speed);
1679                 self->new_speed = 0;
1680         }
1681
1682         /* Finished with this frame, so prepare for next */
1683         self->tx_fifo.ptr++;
1684         self->tx_fifo.len--;
1685
1686         /* Any frames to be sent back-to-back? */
1687         if (self->tx_fifo.len) 
1688         {
1689                 ali_ircc_dma_xmit(self);
1690                 
1691                 /* Not finished yet! */
1692                 ret = FALSE;
1693         } 
1694         else 
1695         {       /* Reset Tx FIFO info */
1696                 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1697                 self->tx_fifo.tail = self->tx_buff.head;
1698         }
1699
1700         /* Make sure we have room for more frames */
1701         if (self->tx_fifo.free < MAX_TX_WINDOW) {
1702                 /* Not busy transmitting anymore */
1703                 /* Tell the network layer, that we can accept more frames */
1704                 netif_wake_queue(self->netdev);
1705         }
1706                 
1707         switch_bank(iobase, BANK0); 
1708         
1709         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
1710         return ret;
1711 }
1712
1713 /*
1714  * Function ali_ircc_dma_receive (self)
1715  *
1716  *    Get ready for receiving a frame. The device will initiate a DMA
1717  *    if it starts to receive a frame.
1718  *
1719  */
1720 static int ali_ircc_dma_receive(struct ali_ircc_cb *self) 
1721 {
1722         int iobase, tmp;
1723         
1724         IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );       
1725         
1726         iobase = self->io.fir_base;
1727         
1728         /* Reset Tx FIFO info */
1729         self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1730         self->tx_fifo.tail = self->tx_buff.head;
1731                 
1732         /* Disable DMA */
1733         switch_bank(iobase, BANK1);
1734         outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1735         
1736         /* Reset Message Count */
1737         switch_bank(iobase, BANK0);
1738         outb(0x07, iobase+FIR_LSR);
1739                 
1740         self->rcvFramesOverflow = FALSE;        
1741         
1742         self->LineStatus = inb(iobase+FIR_LSR) ;
1743         
1744         /* Reset Rx FIFO info */
1745         self->io.direction = IO_RECV;
1746         self->rx_buff.data = self->rx_buff.head;
1747                 
1748         /* Reset Rx FIFO */
1749         // switch_bank(iobase, BANK0);
1750         outb(LCR_A_FIFO_RESET, iobase+FIR_LCR_A); 
1751         
1752         self->st_fifo.len = self->st_fifo.pending_bytes = 0;
1753         self->st_fifo.tail = self->st_fifo.head = 0;
1754                 
1755         irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize,
1756                        DMA_RX_MODE);
1757          
1758         /* Set Receive Mode,Brick Wall */
1759         //switch_bank(iobase, BANK0);
1760         tmp = inb(iobase+FIR_LCR_B);
1761         outb((unsigned char)(tmp &0x3f) | LCR_B_RX_MODE | LCR_B_BW , iobase + FIR_LCR_B); // 2000/12/1 05:16PM
1762         IRDA_DEBUG(1, "%s(), *** Change To RX mode: FIR_LCR_B = 0x%x *** \n", __FUNCTION__ , inb(iobase+FIR_LCR_B));
1763                         
1764         /* Set Rx Threshold */
1765         switch_bank(iobase, BANK1);
1766         outb(RX_FIFO_Threshold, iobase+FIR_FIFO_TR);
1767         outb(RX_DMA_Threshold, iobase+FIR_DMA_TR);
1768                 
1769         /* Enable DMA and Burst Mode */
1770         // switch_bank(iobase, BANK1);
1771         outb(CR_DMA_EN | CR_DMA_BURST, iobase+FIR_CR);
1772                                 
1773         switch_bank(iobase, BANK0); 
1774         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
1775         return 0;
1776 }
1777
1778 static int  ali_ircc_dma_receive_complete(struct ali_ircc_cb *self)
1779 {
1780         struct st_fifo *st_fifo;
1781         struct sk_buff *skb;
1782         __u8 status, MessageCount;
1783         int len, i, iobase, val;        
1784
1785         IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );       
1786
1787         st_fifo = &self->st_fifo;               
1788         iobase = self->io.fir_base;     
1789                 
1790         switch_bank(iobase, BANK0);
1791         MessageCount = inb(iobase+ FIR_LSR)&0x07;
1792         
1793         if (MessageCount > 0)   
1794                 IRDA_DEBUG(0, "%s(), Messsage count = %d,\n", __FUNCTION__ , MessageCount);     
1795                 
1796         for (i=0; i<=MessageCount; i++)
1797         {
1798                 /* Bank 0 */
1799                 switch_bank(iobase, BANK0);
1800                 status = inb(iobase+FIR_LSR);
1801                 
1802                 switch_bank(iobase, BANK2);
1803                 len = inb(iobase+FIR_RX_DSR_HI) & 0x0f;
1804                 len = len << 8; 
1805                 len |= inb(iobase+FIR_RX_DSR_LO);
1806                 
1807                 IRDA_DEBUG(1, "%s(), RX Length = 0x%.2x,\n", __FUNCTION__ , len);       
1808                 IRDA_DEBUG(1, "%s(), RX Status = 0x%.2x,\n", __FUNCTION__ , status);
1809                 
1810                 if (st_fifo->tail >= MAX_RX_WINDOW) {
1811                         IRDA_DEBUG(0, "%s(), window is full!\n", __FUNCTION__ );
1812                         continue;
1813                 }
1814                         
1815                 st_fifo->entries[st_fifo->tail].status = status;
1816                 st_fifo->entries[st_fifo->tail].len = len;
1817                 st_fifo->pending_bytes += len;
1818                 st_fifo->tail++;
1819                 st_fifo->len++;
1820         }
1821                         
1822         for (i=0; i<=MessageCount; i++)
1823         {       
1824                 /* Get first entry */
1825                 status = st_fifo->entries[st_fifo->head].status;
1826                 len    = st_fifo->entries[st_fifo->head].len;
1827                 st_fifo->pending_bytes -= len;
1828                 st_fifo->head++;
1829                 st_fifo->len--;                 
1830                 
1831                 /* Check for errors */
1832                 if ((status & 0xd8) || self->rcvFramesOverflow || (len==0))             
1833                 {
1834                         IRDA_DEBUG(0,"%s(), ************* RX Errors ************ \n", __FUNCTION__ );   
1835                         
1836                         /* Skip frame */
1837                         self->stats.rx_errors++;
1838                         
1839                         self->rx_buff.data += len;
1840                         
1841                         if (status & LSR_FIFO_UR) 
1842                         {
1843                                 self->stats.rx_frame_errors++;
1844                                 IRDA_DEBUG(0,"%s(), ************* FIFO Errors ************ \n", __FUNCTION__ );
1845                         }       
1846                         if (status & LSR_FRAME_ERROR)
1847                         {
1848                                 self->stats.rx_frame_errors++;
1849                                 IRDA_DEBUG(0,"%s(), ************* FRAME Errors ************ \n", __FUNCTION__ );
1850                         }
1851                                                         
1852                         if (status & LSR_CRC_ERROR) 
1853                         {
1854                                 self->stats.rx_crc_errors++;
1855                                 IRDA_DEBUG(0,"%s(), ************* CRC Errors ************ \n", __FUNCTION__ );
1856                         }
1857                         
1858                         if(self->rcvFramesOverflow)
1859                         {
1860                                 self->stats.rx_frame_errors++;
1861                                 IRDA_DEBUG(0,"%s(), ************* Overran DMA buffer ************ \n", __FUNCTION__ );                                                          
1862                         }
1863                         if(len == 0)
1864                         {
1865                                 self->stats.rx_frame_errors++;
1866                                 IRDA_DEBUG(0,"%s(), ********** Receive Frame Size = 0 ********* \n", __FUNCTION__ );
1867                         }
1868                 }        
1869                 else 
1870                 {
1871                         
1872                         if (st_fifo->pending_bytes < 32) 
1873                         {
1874                                 switch_bank(iobase, BANK0);
1875                                 val = inb(iobase+FIR_BSR);      
1876                                 if ((val& BSR_FIFO_NOT_EMPTY)== 0x80) 
1877                                 {
1878                                         IRDA_DEBUG(0, "%s(), ************* BSR_FIFO_NOT_EMPTY ************ \n", __FUNCTION__ );
1879                                         
1880                                         /* Put this entry back in fifo */
1881                                         st_fifo->head--;
1882                                         st_fifo->len++;
1883                                         st_fifo->pending_bytes += len;
1884                                         st_fifo->entries[st_fifo->head].status = status;
1885                                         st_fifo->entries[st_fifo->head].len = len;
1886                                                 
1887                                         /*  
1888                                         * DMA not finished yet, so try again 
1889                                         * later, set timer value, resolution 
1890                                         * 500 us 
1891                                         */
1892                                          
1893                                         switch_bank(iobase, BANK1);
1894                                         outb(TIMER_IIR_500, iobase+FIR_TIMER_IIR); // 2001/1/2 05:07PM
1895                                         
1896                                         /* Enable Timer */
1897                                         outb(inb(iobase+FIR_CR) | CR_TIMER_EN, iobase+FIR_CR);
1898                                                 
1899                                         return FALSE; /* I'll be back! */
1900                                 }
1901                         }               
1902                         
1903                         /* 
1904                          * Remember the time we received this frame, so we can
1905                          * reduce the min turn time a bit since we will know
1906                          * how much time we have used for protocol processing
1907                          */
1908                         do_gettimeofday(&self->stamp);
1909
1910                         skb = dev_alloc_skb(len+1);
1911                         if (skb == NULL)  
1912                         {
1913                                 IRDA_WARNING("%s(), memory squeeze, "
1914                                              "dropping frame.\n",
1915                                              __FUNCTION__);
1916                                 self->stats.rx_dropped++;
1917
1918                                 return FALSE;
1919                         }
1920                         
1921                         /* Make sure IP header gets aligned */
1922                         skb_reserve(skb, 1); 
1923                         
1924                         /* Copy frame without CRC, CRC is removed by hardware*/
1925                         skb_put(skb, len);
1926                         memcpy(skb->data, self->rx_buff.data, len);
1927
1928                         /* Move to next frame */
1929                         self->rx_buff.data += len;
1930                         self->stats.rx_bytes += len;
1931                         self->stats.rx_packets++;
1932
1933                         skb->dev = self->netdev;
1934                         skb_reset_mac_header(skb);
1935                         skb->protocol = htons(ETH_P_IRDA);
1936                         netif_rx(skb);
1937                         self->netdev->last_rx = jiffies;
1938                 }
1939         }
1940         
1941         switch_bank(iobase, BANK0);     
1942                 
1943         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
1944         return TRUE;
1945 }
1946
1947
1948
1949 /*
1950  * Function ali_ircc_sir_hard_xmit (skb, dev)
1951  *
1952  *    Transmit the frame!
1953  *
1954  */
1955 static int ali_ircc_sir_hard_xmit(struct sk_buff *skb, struct net_device *dev)
1956 {
1957         struct ali_ircc_cb *self;
1958         unsigned long flags;
1959         int iobase;
1960         __u32 speed;
1961         
1962         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
1963         
1964         IRDA_ASSERT(dev != NULL, return 0;);
1965         
1966         self = (struct ali_ircc_cb *) dev->priv;
1967         IRDA_ASSERT(self != NULL, return 0;);
1968
1969         iobase = self->io.sir_base;
1970
1971         netif_stop_queue(dev);
1972         
1973         /* Make sure tests *& speed change are atomic */
1974         spin_lock_irqsave(&self->lock, flags);
1975
1976         /* Note : you should make sure that speed changes are not going
1977          * to corrupt any outgoing frame. Look at nsc-ircc for the gory
1978          * details - Jean II */
1979
1980         /* Check if we need to change the speed */
1981         speed = irda_get_next_speed(skb);
1982         if ((speed != self->io.speed) && (speed != -1)) {
1983                 /* Check for empty frame */
1984                 if (!skb->len) {
1985                         ali_ircc_change_speed(self, speed); 
1986                         dev->trans_start = jiffies;
1987                         spin_unlock_irqrestore(&self->lock, flags);
1988                         dev_kfree_skb(skb);
1989                         return 0;
1990                 } else
1991                         self->new_speed = speed;
1992         }
1993
1994         /* Init tx buffer */
1995         self->tx_buff.data = self->tx_buff.head;
1996
1997         /* Copy skb to tx_buff while wrapping, stuffing and making CRC */
1998         self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data, 
1999                                            self->tx_buff.truesize);
2000         
2001         self->stats.tx_bytes += self->tx_buff.len;
2002
2003         /* Turn on transmit finished interrupt. Will fire immediately!  */
2004         outb(UART_IER_THRI, iobase+UART_IER); 
2005
2006         dev->trans_start = jiffies;
2007         spin_unlock_irqrestore(&self->lock, flags);
2008
2009         dev_kfree_skb(skb);
2010         
2011         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
2012         
2013         return 0;       
2014 }
2015
2016
2017 /*
2018  * Function ali_ircc_net_ioctl (dev, rq, cmd)
2019  *
2020  *    Process IOCTL commands for this device
2021  *
2022  */
2023 static int ali_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2024 {
2025         struct if_irda_req *irq = (struct if_irda_req *) rq;
2026         struct ali_ircc_cb *self;
2027         unsigned long flags;
2028         int ret = 0;
2029         
2030         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
2031         
2032         IRDA_ASSERT(dev != NULL, return -1;);
2033
2034         self = dev->priv;
2035
2036         IRDA_ASSERT(self != NULL, return -1;);
2037
2038         IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __FUNCTION__ , dev->name, cmd);
2039         
2040         switch (cmd) {
2041         case SIOCSBANDWIDTH: /* Set bandwidth */
2042                 IRDA_DEBUG(1, "%s(), SIOCSBANDWIDTH\n", __FUNCTION__ );
2043                 /*
2044                  * This function will also be used by IrLAP to change the
2045                  * speed, so we still must allow for speed change within
2046                  * interrupt context.
2047                  */
2048                 if (!in_interrupt() && !capable(CAP_NET_ADMIN))
2049                         return -EPERM;
2050                 
2051                 spin_lock_irqsave(&self->lock, flags);
2052                 ali_ircc_change_speed(self, irq->ifr_baudrate);         
2053                 spin_unlock_irqrestore(&self->lock, flags);
2054                 break;
2055         case SIOCSMEDIABUSY: /* Set media busy */
2056                 IRDA_DEBUG(1, "%s(), SIOCSMEDIABUSY\n", __FUNCTION__ );
2057                 if (!capable(CAP_NET_ADMIN))
2058                         return -EPERM;
2059                 irda_device_set_media_busy(self->netdev, TRUE);
2060                 break;
2061         case SIOCGRECEIVING: /* Check if we are receiving right now */
2062                 IRDA_DEBUG(2, "%s(), SIOCGRECEIVING\n", __FUNCTION__ );
2063                 /* This is protected */
2064                 irq->ifr_receiving = ali_ircc_is_receiving(self);
2065                 break;
2066         default:
2067                 ret = -EOPNOTSUPP;
2068         }
2069         
2070         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
2071         
2072         return ret;
2073 }
2074
2075 /*
2076  * Function ali_ircc_is_receiving (self)
2077  *
2078  *    Return TRUE is we are currently receiving a frame
2079  *
2080  */
2081 static int ali_ircc_is_receiving(struct ali_ircc_cb *self)
2082 {
2083         unsigned long flags;
2084         int status = FALSE;
2085         int iobase;             
2086         
2087         IRDA_DEBUG(2, "%s(), ---------------- Start -----------------\n", __FUNCTION__ );
2088         
2089         IRDA_ASSERT(self != NULL, return FALSE;);
2090
2091         spin_lock_irqsave(&self->lock, flags);
2092
2093         if (self->io.speed > 115200) 
2094         {
2095                 iobase = self->io.fir_base;
2096                 
2097                 switch_bank(iobase, BANK1);
2098                 if((inb(iobase+FIR_FIFO_FR) & 0x3f) != 0)               
2099                 {
2100                         /* We are receiving something */
2101                         IRDA_DEBUG(1, "%s(), We are receiving something\n", __FUNCTION__ );
2102                         status = TRUE;
2103                 }
2104                 switch_bank(iobase, BANK0);             
2105         } 
2106         else
2107         { 
2108                 status = (self->rx_buff.state != OUTSIDE_FRAME);
2109         }
2110         
2111         spin_unlock_irqrestore(&self->lock, flags);
2112         
2113         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2114         
2115         return status;
2116 }
2117
2118 static struct net_device_stats *ali_ircc_net_get_stats(struct net_device *dev)
2119 {
2120         struct ali_ircc_cb *self = (struct ali_ircc_cb *) dev->priv;
2121         
2122         IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
2123                 
2124         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
2125         
2126         return &self->stats;
2127 }
2128
2129 static int ali_ircc_suspend(struct platform_device *dev, pm_message_t state)
2130 {
2131         struct ali_ircc_cb *self = platform_get_drvdata(dev);
2132         
2133         IRDA_MESSAGE("%s, Suspending\n", ALI_IRCC_DRIVER_NAME);
2134
2135         if (self->io.suspended)
2136                 return 0;
2137
2138         ali_ircc_net_close(self->netdev);
2139
2140         self->io.suspended = 1;
2141         
2142         return 0;
2143 }
2144
2145 static int ali_ircc_resume(struct platform_device *dev)
2146 {
2147         struct ali_ircc_cb *self = platform_get_drvdata(dev);
2148         
2149         if (!self->io.suspended)
2150                 return 0;
2151         
2152         ali_ircc_net_open(self->netdev);
2153         
2154         IRDA_MESSAGE("%s, Waking up\n", ALI_IRCC_DRIVER_NAME);
2155
2156         self->io.suspended = 0;
2157
2158         return 0;
2159 }
2160
2161 /* ALi Chip Function */
2162
2163 static void SetCOMInterrupts(struct ali_ircc_cb *self , unsigned char enable)
2164 {
2165         
2166         unsigned char newMask;
2167         
2168         int iobase = self->io.fir_base; /* or sir_base */
2169
2170         IRDA_DEBUG(2, "%s(), -------- Start -------- ( Enable = %d )\n", __FUNCTION__ , enable);        
2171         
2172         /* Enable the interrupt which we wish to */
2173         if (enable){
2174                 if (self->io.direction == IO_XMIT)
2175                 {
2176                         if (self->io.speed > 115200) /* FIR, MIR */
2177                         {
2178                                 newMask = self->ier;
2179                         }
2180                         else /* SIR */
2181                         {
2182                                 newMask = UART_IER_THRI | UART_IER_RDI;
2183                         }
2184                 }
2185                 else {
2186                         if (self->io.speed > 115200) /* FIR, MIR */
2187                         {
2188                                 newMask = self->ier;
2189                         }
2190                         else /* SIR */
2191                         {
2192                                 newMask = UART_IER_RDI;
2193                         }
2194                 }
2195         }
2196         else /* Disable all the interrupts */
2197         {
2198                 newMask = 0x00;
2199
2200         }
2201
2202         //SIR and FIR has different registers
2203         if (self->io.speed > 115200)
2204         {       
2205                 switch_bank(iobase, BANK0);
2206                 outb(newMask, iobase+FIR_IER);
2207         }
2208         else
2209                 outb(newMask, iobase+UART_IER);
2210                 
2211         IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
2212 }
2213
2214 static void SIR2FIR(int iobase)
2215 {
2216         //unsigned char tmp;
2217                 
2218         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
2219         
2220         /* Already protected (change_speed() or setup()), no need to lock.
2221          * Jean II */
2222         
2223         outb(0x28, iobase+UART_MCR);
2224         outb(0x68, iobase+UART_MCR);
2225         outb(0x88, iobase+UART_MCR);            
2226         
2227         outb(0x60, iobase+FIR_MCR);     /*  Master Reset */
2228         outb(0x20, iobase+FIR_MCR);     /*  Master Interrupt Enable */
2229         
2230         //tmp = inb(iobase+FIR_LCR_B);  /* SIP enable */
2231         //tmp |= 0x20;
2232         //outb(tmp, iobase+FIR_LCR_B);  
2233         
2234         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );       
2235 }
2236
2237 static void FIR2SIR(int iobase)
2238 {
2239         unsigned char val;
2240         
2241         IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __FUNCTION__ );
2242         
2243         /* Already protected (change_speed() or setup()), no need to lock.
2244          * Jean II */
2245         
2246         outb(0x20, iobase+FIR_MCR);     /* IRQ to low */
2247         outb(0x00, iobase+UART_IER);    
2248                 
2249         outb(0xA0, iobase+FIR_MCR);     /* Don't set master reset */
2250         outb(0x00, iobase+UART_FCR);
2251         outb(0x07, iobase+UART_FCR);            
2252         
2253         val = inb(iobase+UART_RX);
2254         val = inb(iobase+UART_LSR);
2255         val = inb(iobase+UART_MSR);
2256         
2257         IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __FUNCTION__ );
2258 }
2259
2260 MODULE_AUTHOR("Benjamin Kong <benjamin_kong@ali.com.tw>");
2261 MODULE_DESCRIPTION("ALi FIR Controller Driver");
2262 MODULE_LICENSE("GPL");
2263
2264
2265 module_param_array(io, int, NULL, 0);
2266 MODULE_PARM_DESC(io, "Base I/O addresses");
2267 module_param_array(irq, int, NULL, 0);
2268 MODULE_PARM_DESC(irq, "IRQ lines");
2269 module_param_array(dma, int, NULL, 0);
2270 MODULE_PARM_DESC(dma, "DMA channels");
2271
2272 module_init(ali_ircc_init);
2273 module_exit(ali_ircc_cleanup);