Version:  2.0.40 2.2.26 2.4.37 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16

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

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us