1 /*********************************************************************
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>
14 * Copyright (c) 2000 Benjamin Kong <benjamin_kong@ali.com.tw>
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.
22 ********************************************************************/
24 #include <linux/module.h>
25 #include <linux/gfp.h>
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>
42 #include <asm/byteorder.h>
44 #include <net/irda/wrapper.h>
45 #include <net/irda/irda.h>
46 #include <net/irda/irda_device.h>
50 #define CHIP_IO_EXTENT 8
51 #define BROKEN_DONGLE_ID
53 #define ALI_IRCC_DRIVER_NAME "ali-ircc"
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);
59 static struct platform_driver ali_ircc_driver = {
60 .suspend = ali_ircc_suspend,
61 .resume = ali_ircc_resume,
63 .name = ALI_IRCC_DRIVER_NAME,
68 /* Module parameters */
69 static int qos_mtt_bits = 0x07; /* 1 ms or more */
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 };
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);
80 /* These are the currently known ALi south-bridge chipsets, the only one difference
81 * is that M1543C doesn't support HP HDSL-3600
83 static ali_chip_t chips[] =
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 },
91 /* Max 4 instances for now */
92 static struct ali_ircc_cb *dev_self[] = { NULL, NULL, NULL, NULL };
95 static char *dongle_types[] = {
99 "No dongle connected",
102 /* Some prototypes */
103 static int ali_ircc_open(int i, chipio_t *info);
105 static int ali_ircc_close(struct ali_ircc_cb *self);
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);
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);
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);
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);
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);
143 * Function ali_ircc_init ()
145 * Initialize chip. Find out whay kinds of chips we are dealing with
146 * and their configuration registers address
148 static int __init ali_ircc_init(void)
157 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
159 ret = platform_driver_register(&ali_ircc_driver);
161 IRDA_ERROR("%s, Can't register driver!\n",
162 ALI_IRCC_DRIVER_NAME);
168 /* Probe for all the ALi chipsets we know about */
169 for (chip= chips; chip->name; chip++, i++)
171 IRDA_DEBUG(2, "%s(), Probing for %s ...\n", __func__, chip->name);
173 /* Try all config registers for this chip */
174 for (cfg=0; cfg<2; cfg++)
176 cfg_base = chip->cfg[cfg];
180 memset(&info, 0, sizeof(chipio_t));
181 info.cfg_base = cfg_base;
182 info.fir_base = io[i];
187 /* Enter Configuration */
188 outb(chip->entr1, cfg_base);
189 outb(chip->entr2, cfg_base);
191 /* Select Logical Device 5 Registers (UART2) */
192 outb(0x07, cfg_base);
193 outb(0x05, cfg_base+1);
195 /* Read Chip Identification Register */
196 outb(chip->cid_index, cfg_base);
197 reg = inb(cfg_base+1);
199 if (reg == chip->cid_value)
201 IRDA_DEBUG(2, "%s(), Chip found at 0x%03x\n", __func__, cfg_base);
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);
209 * If the user supplies the base address, then
210 * we init the chip, if not we probe the values
215 chip->init(chip, &info);
219 chip->probe(chip, &info);
222 if (ali_ircc_open(i, &info) == 0)
228 IRDA_DEBUG(2, "%s(), No %s chip at 0x%03x\n", __func__, chip->name, cfg_base);
230 /* Exit configuration */
231 outb(0xbb, cfg_base);
235 IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __func__);
238 platform_driver_unregister(&ali_ircc_driver);
244 * Function ali_ircc_cleanup ()
246 * Close all configured chips
249 static void __exit ali_ircc_cleanup(void)
253 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
255 for (i=0; i < ARRAY_SIZE(dev_self); i++) {
257 ali_ircc_close(dev_self[i]);
260 platform_driver_unregister(&ali_ircc_driver);
262 IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __func__);
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,
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,
280 * Function ali_ircc_open (int i, chipio_t *inf)
282 * Open driver instance
285 static int ali_ircc_open(int i, chipio_t *info)
287 struct net_device *dev;
288 struct ali_ircc_cb *self;
292 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
294 if (i >= ARRAY_SIZE(dev_self)) {
295 IRDA_ERROR("%s(), maximum number of supported chips reached!\n",
300 /* Set FIR FIFO and DMA Threshold */
301 if ((ali_ircc_setup(info)) == -1)
304 dev = alloc_irdadev(sizeof(*self));
306 IRDA_ERROR("%s(), can't allocate memory for control block!\n",
311 self = netdev_priv(dev);
313 spin_lock_init(&self->lock);
315 /* Need to store self somewhere */
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 */
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__,
337 /* Initialize QoS for this device */
338 irda_init_max_qos_capabilies(&self->qos);
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
344 self->qos.min_turn_time.bits = qos_mtt_bits;
346 irda_qos_bits_to_value(&self->qos);
348 /* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
349 self->rx_buff.truesize = 14384;
350 self->tx_buff.truesize = 14384;
352 /* Allocate memory if needed */
354 dma_alloc_coherent(NULL, self->rx_buff.truesize,
355 &self->rx_buff_dma, GFP_KERNEL | __GFP_ZERO);
356 if (self->rx_buff.head == NULL) {
362 dma_alloc_coherent(NULL, self->tx_buff.truesize,
363 &self->tx_buff_dma, GFP_KERNEL | __GFP_ZERO);
364 if (self->tx_buff.head == NULL) {
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;
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;
378 /* Override the network functions we need to use */
379 dev->netdev_ops = &ali_ircc_sir_ops;
381 err = register_netdev(dev);
383 IRDA_ERROR("%s(), register_netdev() failed!\n", __func__);
386 IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);
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]);
393 self->io.dongle_id = dongle_id;
395 IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __func__);
400 dma_free_coherent(NULL, self->tx_buff.truesize,
401 self->tx_buff.head, self->tx_buff_dma);
403 dma_free_coherent(NULL, self->rx_buff.truesize,
404 self->rx_buff.head, self->rx_buff_dma);
406 release_region(self->io.fir_base, self->io.fir_ext);
415 * Function ali_ircc_close (self)
417 * Close driver instance
420 static int __exit ali_ircc_close(struct ali_ircc_cb *self)
424 IRDA_DEBUG(4, "%s(), ---------------- Start ----------------\n", __func__);
426 IRDA_ASSERT(self != NULL, return -1;);
428 iobase = self->io.fir_base;
430 /* Remove netdevice */
431 unregister_netdev(self->netdev);
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);
437 if (self->tx_buff.head)
438 dma_free_coherent(NULL, self->tx_buff.truesize,
439 self->tx_buff.head, self->tx_buff_dma);
441 if (self->rx_buff.head)
442 dma_free_coherent(NULL, self->rx_buff.truesize,
443 self->rx_buff.head, self->rx_buff_dma);
445 dev_self[self->index] = NULL;
446 free_netdev(self->netdev);
448 IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __func__);
454 * Function ali_ircc_init_43 (chip, info)
456 * Initialize the ALi M1543 chip.
458 static int ali_ircc_init_43(ali_chip_t *chip, chipio_t *info)
460 /* All controller information like I/O address, DMA channel, IRQ
468 * Function ali_ircc_init_53 (chip, info)
470 * Initialize the ALi M1535 chip.
472 static int ali_ircc_init_53(ali_chip_t *chip, chipio_t *info)
474 /* All controller information like I/O address, DMA channel, IRQ
482 * Function ali_ircc_probe_53 (chip, info)
484 * Probes for the ALi M1535D or M1535
486 static int ali_ircc_probe_53(ali_chip_t *chip, chipio_t *info)
488 int cfg_base = info->cfg_base;
491 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
493 /* Enter Configuration */
494 outb(chip->entr1, cfg_base);
495 outb(chip->entr2, cfg_base);
497 /* Select Logical Device 5 Registers (UART2) */
498 outb(0x07, cfg_base);
499 outb(0x05, cfg_base+1);
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;
508 info->sir_base = info->fir_base;
510 IRDA_DEBUG(2, "%s(), probing fir_base=0x%03x\n", __func__, info->fir_base);
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);
518 /* Read DMA channel */
519 outb(0x74, cfg_base);
520 reg = inb(cfg_base+1);
521 info->dma = reg & 0x07;
523 if(info->dma == 0x04)
524 IRDA_WARNING("%s(), No DMA channel assigned !\n", __func__);
526 IRDA_DEBUG(2, "%s(), probing dma=%d\n", __func__, info->dma);
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);
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);
540 /* Exit configuration */
541 outb(0xbb, cfg_base);
543 IRDA_DEBUG(2, "%s(), ----------------- End -----------------\n", __func__);
549 * Function ali_ircc_setup (info)
551 * Set FIR FIFO and DMA Threshold
552 * Returns non-negative on success.
555 static int ali_ircc_setup(chipio_t *info)
559 int iobase = info->fir_base;
561 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
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 */
568 /* Switch to FIR space */
572 outb(0x40, iobase+FIR_MCR); // benjamin 2000/11/30 11:45AM
574 /* Read FIR ID Version Register */
575 switch_bank(iobase, BANK3);
576 version = inb(iobase+FIR_ID_VR);
578 /* Should be 0x00 in the M1535/M1535D */
581 IRDA_ERROR("%s, Wrong chip version %02x\n",
582 ALI_IRCC_DRIVER_NAME, version);
586 /* Set FIR FIFO Threshold Register */
587 switch_bank(iobase, BANK1);
588 outb(RX_FIFO_Threshold, iobase+FIR_FIFO_TR);
590 /* Set FIR DMA Threshold Register */
591 outb(RX_DMA_Threshold, iobase+FIR_DMA_TR);
594 switch_bank(iobase, BANK2);
595 outb(inb(iobase+FIR_IRDA_CR) | IRDA_CR_CRC, iobase+FIR_IRDA_CR);
597 /* NDIS driver set TX Length here BANK2 Alias 3, Alias4*/
599 /* Switch to Bank 0 */
600 switch_bank(iobase, BANK0);
602 tmp = inb(iobase+FIR_LCR_B);
603 tmp &=~0x20; // disable SIP
604 tmp |= 0x80; // these two steps make RX mode
606 outb(tmp, iobase+FIR_LCR_B);
608 /* Disable Interrupt */
609 outb(0x00, iobase+FIR_IER);
612 /* Switch to SIR space */
615 IRDA_MESSAGE("%s, driver loaded (Benjamin Kong)\n",
616 ALI_IRCC_DRIVER_NAME);
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
622 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__);
628 * Function ali_ircc_read_dongle_id (int index, info)
630 * Try to read dongle indentification. 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.
634 static int ali_ircc_read_dongle_id (int i, chipio_t *info)
637 int cfg_base = info->cfg_base;
639 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
641 /* Enter Configuration */
642 outb(chips[i].entr1, cfg_base);
643 outb(chips[i].entr2, cfg_base);
645 /* Select Logical Device 5 Registers (UART2) */
646 outb(0x07, cfg_base);
647 outb(0x05, cfg_base+1);
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]);
656 /* Exit configuration */
657 outb(0xbb, cfg_base);
659 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__);
665 * Function ali_ircc_interrupt (irq, dev_id, regs)
667 * An interrupt from the chip has arrived. Time to do some work
670 static irqreturn_t ali_ircc_interrupt(int irq, void *dev_id)
672 struct net_device *dev = dev_id;
673 struct ali_ircc_cb *self;
676 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
678 self = netdev_priv(dev);
680 spin_lock(&self->lock);
682 /* Dispatch interrupt handler for the current speed */
683 if (self->io.speed > 115200)
684 ret = ali_ircc_fir_interrupt(self);
686 ret = ali_ircc_sir_interrupt(self);
688 spin_unlock(&self->lock);
690 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__);
694 * Function ali_ircc_fir_interrupt(irq, struct ali_ircc_cb *self)
696 * Handle MIR/FIR interrupt
699 static irqreturn_t ali_ircc_fir_interrupt(struct ali_ircc_cb *self)
701 __u8 eir, OldMessageCount;
704 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__);
706 iobase = self->io.fir_base;
708 switch_bank(iobase, BANK0);
709 self->InterruptID = inb(iobase+FIR_IIR);
710 self->BusStatus = inb(iobase+FIR_BSR);
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 */
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);
722 /* Disable interrupts */
723 SetCOMInterrupts(self, FALSE);
725 /* Tx or Rx Interrupt */
729 if (self->io.direction == IO_XMIT) /* TX */
731 IRDA_DEBUG(1, "%s(), ******* IIR_EOM (Tx) *******\n", __func__);
733 if(ali_ircc_dma_xmit_complete(self))
735 if (irda_device_txqueue_empty(self->netdev))
737 /* Prepare for receive */
738 ali_ircc_dma_receive(self);
750 IRDA_DEBUG(1, "%s(), ******* IIR_EOM (Rx) *******\n", __func__);
752 if(OldMessageCount > ((self->LineStatus+1) & 0x07))
754 self->rcvFramesOverflow = TRUE;
755 IRDA_DEBUG(1, "%s(), ******* self->rcvFramesOverflow = TRUE ********\n", __func__);
758 if (ali_ircc_dma_receive_complete(self))
760 IRDA_DEBUG(1, "%s(), ******* receive complete ********\n", __func__);
766 IRDA_DEBUG(1, "%s(), ******* Not receive complete ********\n", __func__);
768 self->ier = IER_EOM | IER_TIMER;
773 /* Timer Interrupt */
774 else if (eir & IIR_TIMER)
776 if(OldMessageCount > ((self->LineStatus+1) & 0x07))
778 self->rcvFramesOverflow = TRUE;
779 IRDA_DEBUG(1, "%s(), ******* self->rcvFramesOverflow = TRUE *******\n", __func__);
782 switch_bank(iobase, BANK1);
783 tmp = inb(iobase+FIR_CR);
784 outb( tmp& ~CR_TIMER_EN, iobase+FIR_CR);
786 /* Check if this is a Tx timer interrupt */
787 if (self->io.direction == IO_XMIT)
789 ali_ircc_dma_xmit(self);
791 /* Interrupt on EOM */
797 if(ali_ircc_dma_receive_complete(self))
803 self->ier = IER_EOM | IER_TIMER;
808 /* Restore Interrupt */
809 SetCOMInterrupts(self, TRUE);
811 IRDA_DEBUG(1, "%s(), ----------------- End ---------------\n", __func__);
812 return IRQ_RETVAL(eir);
816 * Function ali_ircc_sir_interrupt (irq, self, eir)
818 * Handle SIR interrupt
821 static irqreturn_t ali_ircc_sir_interrupt(struct ali_ircc_cb *self)
826 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
828 iobase = self->io.sir_base;
830 iir = inb(iobase+UART_IIR) & UART_IIR_ID;
832 /* Clear interrupt */
833 lsr = inb(iobase+UART_LSR);
835 IRDA_DEBUG(4, "%s(), iir=%02x, lsr=%02x, iobase=%#x\n", __func__,
841 IRDA_DEBUG(2, "%s(), RLSI\n", __func__);
844 /* Receive interrupt */
845 ali_ircc_sir_receive(self);
848 if (lsr & UART_LSR_THRE)
850 /* Transmitter ready for data */
851 ali_ircc_sir_write_wakeup(self);
855 IRDA_DEBUG(0, "%s(), unhandled IIR=%#x\n", __func__, iir);
862 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__);
864 return IRQ_RETVAL(iir);
869 * Function ali_ircc_sir_receive (self)
871 * Receive one frame from the infrared port
874 static void ali_ircc_sir_receive(struct ali_ircc_cb *self)
879 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__);
880 IRDA_ASSERT(self != NULL, return;);
882 iobase = self->io.sir_base;
885 * Receive all characters in Rx FIFO, unwrap and unstuff them.
886 * async_unwrap_char will deliver all found frames
889 async_unwrap_char(self->netdev, &self->netdev->stats, &self->rx_buff,
890 inb(iobase+UART_RX));
892 /* Make sure we don't stay here too long */
893 if (boguscount++ > 32) {
894 IRDA_DEBUG(2,"%s(), breaking!\n", __func__);
897 } while (inb(iobase+UART_LSR) & UART_LSR_DR);
899 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
903 * Function ali_ircc_sir_write_wakeup (tty)
905 * Called by the driver when there's room for more data. If we have
906 * more packets to send, we send them here.
909 static void ali_ircc_sir_write_wakeup(struct ali_ircc_cb *self)
914 IRDA_ASSERT(self != NULL, return;);
916 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__ );
918 iobase = self->io.sir_base;
920 /* Finished with frame? */
921 if (self->tx_buff.len > 0)
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;
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__ );
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);
941 // benjamin 2000/11/10 06:32PM
942 if (self->io.speed > 115200)
944 IRDA_DEBUG(2, "%s(), ali_ircc_change_speed from UART_LSR_TEMT\n", __func__ );
947 // SetCOMInterrupts(self, TRUE);
953 netif_wake_queue(self->netdev);
956 self->netdev->stats.tx_packets++;
958 /* Turn on receive interrupts */
959 outb(UART_IER_RDI, iobase+UART_IER);
962 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
965 static void ali_ircc_change_speed(struct ali_ircc_cb *self, __u32 baud)
967 struct net_device *dev = self->netdev;
970 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__ );
972 IRDA_DEBUG(2, "%s(), setting speed = %d\n", __func__ , baud);
974 /* This function *must* be called with irq off and spin-lock.
977 iobase = self->io.fir_base;
979 SetCOMInterrupts(self, FALSE); // 2000/11/24 11:43AM
981 /* Go to MIR, FIR Speed */
986 ali_ircc_fir_change_speed(self, baud);
988 /* Install FIR xmit handler*/
989 dev->netdev_ops = &ali_ircc_fir_ops;
991 /* Enable Interuupt */
992 self->ier = IER_EOM; // benjamin 2000/11/20 07:24PM
994 /* Be ready for incoming frames */
995 ali_ircc_dma_receive(self); // benajmin 2000/11/8 07:46PM not complete
997 /* Go to SIR Speed */
1000 ali_ircc_sir_change_speed(self, baud);
1002 /* Install SIR xmit handler*/
1003 dev->netdev_ops = &ali_ircc_sir_ops;
1007 SetCOMInterrupts(self, TRUE); // 2000/11/24 11:43AM
1009 netif_wake_queue(self->netdev);
1011 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
1014 static void ali_ircc_fir_change_speed(struct ali_ircc_cb *priv, __u32 baud)
1018 struct ali_ircc_cb *self = priv;
1019 struct net_device *dev;
1021 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__ );
1023 IRDA_ASSERT(self != NULL, return;);
1026 iobase = self->io.fir_base;
1028 IRDA_DEBUG(1, "%s(), self->io.speed = %d, change to speed = %d\n", __func__ ,self->io.speed,baud);
1030 /* Come from SIR speed */
1031 if(self->io.speed <=115200)
1036 /* Update accounting for new speed */
1037 self->io.speed = baud;
1039 // Set Dongle Speed mode
1040 ali_ircc_change_dongle_speed(self, baud);
1042 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1046 * Function ali_sir_change_speed (self, speed)
1048 * Set speed of IrDA port to specified baudrate
1051 static void ali_ircc_sir_change_speed(struct ali_ircc_cb *priv, __u32 speed)
1053 struct ali_ircc_cb *self = priv;
1054 unsigned long flags;
1056 int fcr; /* FIFO control reg */
1057 int lcr; /* Line control reg */
1060 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__ );
1062 IRDA_DEBUG(1, "%s(), Setting speed to: %d\n", __func__ , speed);
1064 IRDA_ASSERT(self != NULL, return;);
1066 iobase = self->io.sir_base;
1068 /* Come from MIR or FIR speed */
1069 if(self->io.speed >115200)
1071 // Set Dongle Speed mode first
1072 ali_ircc_change_dongle_speed(self, speed);
1077 // Clear Line and Auxiluary status registers 2000/11/24 11:47AM
1079 inb(iobase+UART_LSR);
1080 inb(iobase+UART_SCR);
1082 /* Update accounting for new speed */
1083 self->io.speed = speed;
1085 spin_lock_irqsave(&self->lock, flags);
1087 divisor = 115200/speed;
1089 fcr = UART_FCR_ENABLE_FIFO;
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.
1096 if (self->io.speed < 38400)
1097 fcr |= UART_FCR_TRIGGER_1;
1099 fcr |= UART_FCR_TRIGGER_14;
1101 /* IrDA ports use 8N1 */
1102 lcr = UART_LCR_WLEN8;
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 */
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);
1114 spin_unlock_irqrestore(&self->lock, flags);
1116 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1119 static void ali_ircc_change_dongle_speed(struct ali_ircc_cb *priv, int speed)
1122 struct ali_ircc_cb *self = priv;
1123 int iobase,dongle_id;
1126 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__ );
1128 iobase = self->io.fir_base; /* or iobase = self->io.sir_base; */
1129 dongle_id = self->io.dongle_id;
1131 /* We are already locked, no need to do it again */
1133 IRDA_DEBUG(1, "%s(), Set Speed for %s , Speed = %d\n", __func__ , dongle_types[dongle_id], speed);
1135 switch_bank(iobase, BANK2);
1136 tmp = inb(iobase+FIR_IRDA_CR);
1138 /* IBM type dongle */
1141 if(speed == 4000000)
1144 // SD/MODE __| |__ __
1149 tmp &= ~IRDA_CR_HDLC; // HDLC=0
1150 tmp |= IRDA_CR_CRC; // CRC=1
1152 switch_bank(iobase, BANK2);
1153 outb(tmp, iobase+FIR_IRDA_CR);
1155 // T1 -> SD/MODE:0 IRTX:0
1158 outb(tmp, iobase+FIR_IRDA_CR);
1161 // T2 -> SD/MODE:1 IRTX:0
1164 outb(tmp, iobase+FIR_IRDA_CR);
1167 // T3 -> SD/MODE:1 IRTX:1
1169 outb(tmp, iobase+FIR_IRDA_CR);
1172 // T4 -> SD/MODE:0 IRTX:1
1175 outb(tmp, iobase+FIR_IRDA_CR);
1178 // T5 -> SD/MODE:0 IRTX:0
1181 outb(tmp, iobase+FIR_IRDA_CR);
1184 // reset -> Normal TX output Signal
1185 outb(tmp & ~0x02, iobase+FIR_IRDA_CR);
1187 else /* speed <=1152000 */
1195 /* MIR 115200, 57600 */
1198 tmp |= 0xA0; //HDLC=1, 1.152Mbps=1
1202 tmp &=~0x80; //HDLC 0.576Mbps
1203 tmp |= 0x20; //HDLC=1,
1206 tmp |= IRDA_CR_CRC; // CRC=1
1208 switch_bank(iobase, BANK2);
1209 outb(tmp, iobase+FIR_IRDA_CR);
1211 /* MIR 115200, 57600 */
1213 //switch_bank(iobase, BANK2);
1214 // T1 -> SD/MODE:0 IRTX:0
1217 outb(tmp, iobase+FIR_IRDA_CR);
1220 // T2 -> SD/MODE:1 IRTX:0
1223 outb(tmp, iobase+FIR_IRDA_CR);
1225 // T3 -> SD/MODE:0 IRTX:0
1228 outb(tmp, iobase+FIR_IRDA_CR);
1231 // reset -> Normal TX output Signal
1232 outb(tmp & ~0x02, iobase+FIR_IRDA_CR);
1235 else if (dongle_id == 1) /* HP HDSL-3600 */
1240 tmp &= ~IRDA_CR_HDLC; // HDLC=0
1244 tmp |= 0xA0; // HDLC=1, 1.152Mbps=1
1248 tmp &=~0x80; // HDLC 0.576Mbps
1249 tmp |= 0x20; // HDLC=1,
1253 tmp |= IRDA_CR_CRC; // CRC=1
1255 switch_bank(iobase, BANK2);
1256 outb(tmp, iobase+FIR_IRDA_CR);
1258 else /* HP HDSL-1100 */
1260 if(speed <= 115200) /* SIR */
1263 tmp &= ~IRDA_CR_FIR_SIN; // HP sin select = 0
1265 switch_bank(iobase, BANK2);
1266 outb(tmp, iobase+FIR_IRDA_CR);
1274 tmp &= ~IRDA_CR_HDLC; // HDLC=0
1278 tmp |= 0xA0; // HDLC=1, 1.152Mbps=1
1282 tmp &=~0x80; // HDLC 0.576Mbps
1283 tmp |= 0x20; // HDLC=1,
1287 tmp |= IRDA_CR_CRC; // CRC=1
1288 tmp |= IRDA_CR_FIR_SIN; // HP sin select = 1
1290 switch_bank(iobase, BANK2);
1291 outb(tmp, iobase+FIR_IRDA_CR);
1295 switch_bank(iobase, BANK0);
1297 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1301 * Function ali_ircc_sir_write (driver)
1303 * Fill Tx FIFO with transmit data
1306 static int ali_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len)
1310 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__ );
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__ );
1318 /* Fill FIFO with current frame */
1319 while ((fifo_size-- > 0) && (actual < len)) {
1320 /* Transmit next byte */
1321 outb(buf[actual], iobase+UART_TX);
1326 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
1331 * Function ali_ircc_net_open (dev)
1336 static int ali_ircc_net_open(struct net_device *dev)
1338 struct ali_ircc_cb *self;
1342 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__ );
1344 IRDA_ASSERT(dev != NULL, return -1;);
1346 self = netdev_priv(dev);
1348 IRDA_ASSERT(self != NULL, return 0;);
1350 iobase = self->io.fir_base;
1352 /* Request IRQ and install Interrupt Handler */
1353 if (request_irq(self->io.irq, ali_ircc_interrupt, 0, dev->name, dev))
1355 IRDA_WARNING("%s, unable to allocate irq=%d\n",
1356 ALI_IRCC_DRIVER_NAME,
1362 * Always allocate the DMA channel after the IRQ, and clean up on
1365 if (request_dma(self->io.dma, dev->name)) {
1366 IRDA_WARNING("%s, unable to allocate dma=%d\n",
1367 ALI_IRCC_DRIVER_NAME,
1369 free_irq(self->io.irq, dev);
1373 /* Turn on interrups */
1374 outb(UART_IER_RDI , iobase+UART_IER);
1376 /* Ready to play! */
1377 netif_start_queue(dev); //benjamin by irport
1379 /* Give self a hardware name */
1380 sprintf(hwname, "ALI-FIR @ 0x%03x", self->io.fir_base);
1383 * Open new IrLAP layer instance, now that everything should be
1384 * initialized properly
1386 self->irlap = irlap_open(dev, &self->qos, hwname);
1388 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
1394 * Function ali_ircc_net_close (dev)
1399 static int ali_ircc_net_close(struct net_device *dev)
1402 struct ali_ircc_cb *self;
1405 IRDA_DEBUG(4, "%s(), ---------------- Start ----------------\n", __func__ );
1407 IRDA_ASSERT(dev != NULL, return -1;);
1409 self = netdev_priv(dev);
1410 IRDA_ASSERT(self != NULL, return 0;);
1413 netif_stop_queue(dev);
1415 /* Stop and remove instance of IrLAP */
1417 irlap_close(self->irlap);
1420 disable_dma(self->io.dma);
1422 /* Disable interrupts */
1423 SetCOMInterrupts(self, FALSE);
1425 free_irq(self->io.irq, dev);
1426 free_dma(self->io.dma);
1428 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
1434 * Function ali_ircc_fir_hard_xmit (skb, dev)
1436 * Transmit the frame
1439 static netdev_tx_t ali_ircc_fir_hard_xmit(struct sk_buff *skb,
1440 struct net_device *dev)
1442 struct ali_ircc_cb *self;
1443 unsigned long flags;
1448 IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __func__ );
1450 self = netdev_priv(dev);
1451 iobase = self->io.fir_base;
1453 netif_stop_queue(dev);
1455 /* Make sure tests *& speed change are atomic */
1456 spin_lock_irqsave(&self->lock, flags);
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 */
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 */
1467 ali_ircc_change_speed(self, speed);
1468 dev->trans_start = jiffies;
1469 spin_unlock_irqrestore(&self->lock, flags);
1471 return NETDEV_TX_OK;
1473 self->new_speed = speed;
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;
1481 dev->stats.tx_bytes += skb->len;
1483 skb_copy_from_linear_data(skb, self->tx_fifo.queue[self->tx_fifo.free].start,
1485 self->tx_fifo.len++;
1486 self->tx_fifo.free++;
1488 /* Start transmit only if there is currently no transmit going on */
1489 if (self->tx_fifo.len == 1)
1491 /* Check if we must wait the min turn time or not */
1492 mtt = irda_get_mtt(skb);
1496 /* Check how much time we have used already */
1497 do_gettimeofday(&self->now);
1499 diff = self->now.tv_usec - self->stamp.tv_usec;
1500 /* self->stamp is set from ali_ircc_dma_receive_complete() */
1502 IRDA_DEBUG(1, "%s(), ******* diff = %d *******\n", __func__ , diff);
1507 /* Check if the mtt is larger than the time we have
1508 * already used by all the protocol processing
1515 * Use timer if delay larger than 1000 us, and
1516 * use udelay for smaller values which should
1521 /* Adjust for timer resolution */
1522 mtt = (mtt+250) / 500; /* 4 discard, 5 get advanced, Let's round off */
1524 IRDA_DEBUG(1, "%s(), ************** mtt = %d ***********\n", __func__ , mtt);
1527 if (mtt == 1) /* 500 us */
1529 switch_bank(iobase, BANK1);
1530 outb(TIMER_IIR_500, iobase+FIR_TIMER_IIR);
1532 else if (mtt == 2) /* 1 ms */
1534 switch_bank(iobase, BANK1);
1535 outb(TIMER_IIR_1ms, iobase+FIR_TIMER_IIR);
1537 else /* > 2ms -> 4ms */
1539 switch_bank(iobase, BANK1);
1540 outb(TIMER_IIR_2ms, iobase+FIR_TIMER_IIR);
1545 outb(inb(iobase+FIR_CR) | CR_TIMER_EN, iobase+FIR_CR);
1546 self->io.direction = IO_XMIT;
1548 /* Enable timer interrupt */
1549 self->ier = IER_TIMER;
1550 SetCOMInterrupts(self, TRUE);
1552 /* Timer will take care of the rest */
1557 } // if (if (mtt > diff)
1560 /* Enable EOM interrupt */
1561 self->ier = IER_EOM;
1562 SetCOMInterrupts(self, TRUE);
1564 /* Transmit frame */
1565 ali_ircc_dma_xmit(self);
1566 } // if (self->tx_fifo.len == 1)
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);
1574 /* Restore bank register */
1575 switch_bank(iobase, BANK0);
1577 dev->trans_start = jiffies;
1578 spin_unlock_irqrestore(&self->lock, flags);
1581 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1582 return NETDEV_TX_OK;
1586 static void ali_ircc_dma_xmit(struct ali_ircc_cb *self)
1589 unsigned char FIFO_OPTI, Hi, Lo;
1592 IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __func__ );
1594 iobase = self->io.fir_base;
1596 /* FIFO threshold , this method comes from NDIS5 code */
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;
1601 FIFO_OPTI = TX_FIFO_Threshold;
1604 switch_bank(iobase, BANK1);
1605 outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1607 self->io.direction = IO_XMIT;
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,
1616 switch_bank(iobase, BANK0);
1617 outb(LCR_A_FIFO_RESET, iobase+FIR_LCR_A);
1619 /* Set Tx FIFO threshold */
1620 if (self->fifo_opti_buf!=FIFO_OPTI)
1622 switch_bank(iobase, BANK1);
1623 outb(FIFO_OPTI, iobase+FIR_FIFO_TR) ;
1624 self->fifo_opti_buf=FIFO_OPTI;
1627 /* Set Tx DMA threshold */
1628 switch_bank(iobase, BANK1);
1629 outb(TX_DMA_Threshold, iobase+FIR_DMA_TR);
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);
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));
1645 outb(0, iobase+FIR_LSR);
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);
1651 switch_bank(iobase, BANK0);
1653 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1656 static int ali_ircc_dma_xmit_complete(struct ali_ircc_cb *self)
1661 IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __func__ );
1663 iobase = self->io.fir_base;
1666 switch_bank(iobase, BANK1);
1667 outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1669 /* Check for underrun! */
1670 switch_bank(iobase, BANK0);
1671 if((inb(iobase+FIR_LSR) & LSR_FRAME_ABORT) == LSR_FRAME_ABORT)
1674 IRDA_ERROR("%s(), ********* LSR_FRAME_ABORT *********\n", __func__);
1675 self->netdev->stats.tx_errors++;
1676 self->netdev->stats.tx_fifo_errors++;
1680 self->netdev->stats.tx_packets++;
1683 /* Check if we need to change the speed */
1684 if (self->new_speed)
1686 ali_ircc_change_speed(self, self->new_speed);
1687 self->new_speed = 0;
1690 /* Finished with this frame, so prepare for next */
1691 self->tx_fifo.ptr++;
1692 self->tx_fifo.len--;
1694 /* Any frames to be sent back-to-back? */
1695 if (self->tx_fifo.len)
1697 ali_ircc_dma_xmit(self);
1699 /* Not finished yet! */
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;
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);
1715 switch_bank(iobase, BANK0);
1717 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1722 * Function ali_ircc_dma_receive (self)
1724 * Get ready for receiving a frame. The device will initiate a DMA
1725 * if it starts to receive a frame.
1728 static int ali_ircc_dma_receive(struct ali_ircc_cb *self)
1732 IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __func__ );
1734 iobase = self->io.fir_base;
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;
1741 switch_bank(iobase, BANK1);
1742 outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
1744 /* Reset Message Count */
1745 switch_bank(iobase, BANK0);
1746 outb(0x07, iobase+FIR_LSR);
1748 self->rcvFramesOverflow = FALSE;
1750 self->LineStatus = inb(iobase+FIR_LSR) ;
1752 /* Reset Rx FIFO info */
1753 self->io.direction = IO_RECV;
1754 self->rx_buff.data = self->rx_buff.head;
1757 // switch_bank(iobase, BANK0);
1758 outb(LCR_A_FIFO_RESET, iobase+FIR_LCR_A);
1760 self->st_fifo.len = self->st_fifo.pending_bytes = 0;
1761 self->st_fifo.tail = self->st_fifo.head = 0;
1763 irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize,
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));
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);
1777 /* Enable DMA and Burst Mode */
1778 // switch_bank(iobase, BANK1);
1779 outb(CR_DMA_EN | CR_DMA_BURST, iobase+FIR_CR);
1781 switch_bank(iobase, BANK0);
1782 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1786 static int ali_ircc_dma_receive_complete(struct ali_ircc_cb *self)
1788 struct st_fifo *st_fifo;
1789 struct sk_buff *skb;
1790 __u8 status, MessageCount;
1791 int len, i, iobase, val;
1793 IRDA_DEBUG(1, "%s(), ---------------- Start -----------------\n", __func__ );
1795 st_fifo = &self->st_fifo;
1796 iobase = self->io.fir_base;
1798 switch_bank(iobase, BANK0);
1799 MessageCount = inb(iobase+ FIR_LSR)&0x07;
1801 if (MessageCount > 0)
1802 IRDA_DEBUG(0, "%s(), Message count = %d,\n", __func__ , MessageCount);
1804 for (i=0; i<=MessageCount; i++)
1807 switch_bank(iobase, BANK0);
1808 status = inb(iobase+FIR_LSR);
1810 switch_bank(iobase, BANK2);
1811 len = inb(iobase+FIR_RX_DSR_HI) & 0x0f;
1813 len |= inb(iobase+FIR_RX_DSR_LO);
1815 IRDA_DEBUG(1, "%s(), RX Length = 0x%.2x,\n", __func__ , len);
1816 IRDA_DEBUG(1, "%s(), RX Status = 0x%.2x,\n", __func__ , status);
1818 if (st_fifo->tail >= MAX_RX_WINDOW) {
1819 IRDA_DEBUG(0, "%s(), window is full!\n", __func__ );
1823 st_fifo->entries[st_fifo->tail].status = status;
1824 st_fifo->entries[st_fifo->tail].len = len;
1825 st_fifo->pending_bytes += len;
1830 for (i=0; i<=MessageCount; i++)
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;
1839 /* Check for errors */
1840 if ((status & 0xd8) || self->rcvFramesOverflow || (len==0))
1842 IRDA_DEBUG(0,"%s(), ************* RX Errors ************\n", __func__ );
1845 self->netdev->stats.rx_errors++;
1847 self->rx_buff.data += len;
1849 if (status & LSR_FIFO_UR)
1851 self->netdev->stats.rx_frame_errors++;
1852 IRDA_DEBUG(0,"%s(), ************* FIFO Errors ************\n", __func__ );
1854 if (status & LSR_FRAME_ERROR)
1856 self->netdev->stats.rx_frame_errors++;
1857 IRDA_DEBUG(0,"%s(), ************* FRAME Errors ************\n", __func__ );
1860 if (status & LSR_CRC_ERROR)
1862 self->netdev->stats.rx_crc_errors++;
1863 IRDA_DEBUG(0,"%s(), ************* CRC Errors ************\n", __func__ );
1866 if(self->rcvFramesOverflow)
1868 self->netdev->stats.rx_frame_errors++;
1869 IRDA_DEBUG(0,"%s(), ************* Overran DMA buffer ************\n", __func__ );
1873 self->netdev->stats.rx_frame_errors++;
1874 IRDA_DEBUG(0,"%s(), ********** Receive Frame Size = 0 *********\n", __func__ );
1880 if (st_fifo->pending_bytes < 32)
1882 switch_bank(iobase, BANK0);
1883 val = inb(iobase+FIR_BSR);
1884 if ((val& BSR_FIFO_NOT_EMPTY)== 0x80)
1886 IRDA_DEBUG(0, "%s(), ************* BSR_FIFO_NOT_EMPTY ************\n", __func__ );
1888 /* Put this entry back in fifo */
1891 st_fifo->pending_bytes += len;
1892 st_fifo->entries[st_fifo->head].status = status;
1893 st_fifo->entries[st_fifo->head].len = len;
1896 * DMA not finished yet, so try again
1897 * later, set timer value, resolution
1901 switch_bank(iobase, BANK1);
1902 outb(TIMER_IIR_500, iobase+FIR_TIMER_IIR); // 2001/1/2 05:07PM
1905 outb(inb(iobase+FIR_CR) | CR_TIMER_EN, iobase+FIR_CR);
1907 return FALSE; /* I'll be back! */
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
1916 do_gettimeofday(&self->stamp);
1918 skb = dev_alloc_skb(len+1);
1921 IRDA_WARNING("%s(), memory squeeze, "
1922 "dropping frame.\n",
1924 self->netdev->stats.rx_dropped++;
1929 /* Make sure IP header gets aligned */
1930 skb_reserve(skb, 1);
1932 /* Copy frame without CRC, CRC is removed by hardware*/
1934 skb_copy_to_linear_data(skb, self->rx_buff.data, len);
1936 /* Move to next frame */
1937 self->rx_buff.data += len;
1938 self->netdev->stats.rx_bytes += len;
1939 self->netdev->stats.rx_packets++;
1941 skb->dev = self->netdev;
1942 skb_reset_mac_header(skb);
1943 skb->protocol = htons(ETH_P_IRDA);
1948 switch_bank(iobase, BANK0);
1950 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
1957 * Function ali_ircc_sir_hard_xmit (skb, dev)
1959 * Transmit the frame!
1962 static netdev_tx_t ali_ircc_sir_hard_xmit(struct sk_buff *skb,
1963 struct net_device *dev)
1965 struct ali_ircc_cb *self;
1966 unsigned long flags;
1970 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__ );
1972 IRDA_ASSERT(dev != NULL, return NETDEV_TX_OK;);
1974 self = netdev_priv(dev);
1975 IRDA_ASSERT(self != NULL, return NETDEV_TX_OK;);
1977 iobase = self->io.sir_base;
1979 netif_stop_queue(dev);
1981 /* Make sure tests *& speed change are atomic */
1982 spin_lock_irqsave(&self->lock, flags);
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 */
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 */
1993 ali_ircc_change_speed(self, speed);
1994 dev->trans_start = jiffies;
1995 spin_unlock_irqrestore(&self->lock, flags);
1997 return NETDEV_TX_OK;
1999 self->new_speed = speed;
2002 /* Init tx buffer */
2003 self->tx_buff.data = self->tx_buff.head;
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);
2009 self->netdev->stats.tx_bytes += self->tx_buff.len;
2011 /* Turn on transmit finished interrupt. Will fire immediately! */
2012 outb(UART_IER_THRI, iobase+UART_IER);
2014 dev->trans_start = jiffies;
2015 spin_unlock_irqrestore(&self->lock, flags);
2019 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
2021 return NETDEV_TX_OK;
2026 * Function ali_ircc_net_ioctl (dev, rq, cmd)
2028 * Process IOCTL commands for this device
2031 static int ali_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2033 struct if_irda_req *irq = (struct if_irda_req *) rq;
2034 struct ali_ircc_cb *self;
2035 unsigned long flags;
2038 IRDA_DEBUG(2, "%s(), ---------------- Start ----------------\n", __func__ );
2040 IRDA_ASSERT(dev != NULL, return -1;);
2042 self = netdev_priv(dev);
2044 IRDA_ASSERT(self != NULL, return -1;);
2046 IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __func__ , dev->name, cmd);
2049 case SIOCSBANDWIDTH: /* Set bandwidth */
2050 IRDA_DEBUG(1, "%s(), SIOCSBANDWIDTH\n", __func__ );
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.
2056 if (!in_interrupt() && !capable(CAP_NET_ADMIN))
2059 spin_lock_irqsave(&self->lock, flags);
2060 ali_ircc_change_speed(self, irq->ifr_baudrate);
2061 spin_unlock_irqrestore(&self->lock, flags);
2063 case SIOCSMEDIABUSY: /* Set media busy */
2064 IRDA_DEBUG(1, "%s(), SIOCSMEDIABUSY\n", __func__ );
2065 if (!capable(CAP_NET_ADMIN))
2067 irda_device_set_media_busy(self->netdev, TRUE);
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);
2078 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
2084 * Function ali_ircc_is_receiving (self)
2086 * Return TRUE is we are currently receiving a frame
2089 static int ali_ircc_is_receiving(struct ali_ircc_cb *self)
2091 unsigned long flags;
2095 IRDA_DEBUG(2, "%s(), ---------------- Start -----------------\n", __func__ );
2097 IRDA_ASSERT(self != NULL, return FALSE;);
2099 spin_lock_irqsave(&self->lock, flags);
2101 if (self->io.speed > 115200)
2103 iobase = self->io.fir_base;
2105 switch_bank(iobase, BANK1);
2106 if((inb(iobase+FIR_FIFO_FR) & 0x3f) != 0)
2108 /* We are receiving something */
2109 IRDA_DEBUG(1, "%s(), We are receiving something\n", __func__ );
2112 switch_bank(iobase, BANK0);
2116 status = (self->rx_buff.state != OUTSIDE_FRAME);
2119 spin_unlock_irqrestore(&self->lock, flags);
2121 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
2126 static int ali_ircc_suspend(struct platform_device *dev, pm_message_t state)
2128 struct ali_ircc_cb *self = platform_get_drvdata(dev);
2130 IRDA_MESSAGE("%s, Suspending\n", ALI_IRCC_DRIVER_NAME);
2132 if (self->io.suspended)
2135 ali_ircc_net_close(self->netdev);
2137 self->io.suspended = 1;
2142 static int ali_ircc_resume(struct platform_device *dev)
2144 struct ali_ircc_cb *self = platform_get_drvdata(dev);
2146 if (!self->io.suspended)
2149 ali_ircc_net_open(self->netdev);
2151 IRDA_MESSAGE("%s, Waking up\n", ALI_IRCC_DRIVER_NAME);
2153 self->io.suspended = 0;
2158 /* ALi Chip Function */
2160 static void SetCOMInterrupts(struct ali_ircc_cb *self , unsigned char enable)
2163 unsigned char newMask;
2165 int iobase = self->io.fir_base; /* or sir_base */
2167 IRDA_DEBUG(2, "%s(), -------- Start -------- ( Enable = %d )\n", __func__ , enable);
2169 /* Enable the interrupt which we wish to */
2171 if (self->io.direction == IO_XMIT)
2173 if (self->io.speed > 115200) /* FIR, MIR */
2175 newMask = self->ier;
2179 newMask = UART_IER_THRI | UART_IER_RDI;
2183 if (self->io.speed > 115200) /* FIR, MIR */
2185 newMask = self->ier;
2189 newMask = UART_IER_RDI;
2193 else /* Disable all the interrupts */
2199 //SIR and FIR has different registers
2200 if (self->io.speed > 115200)
2202 switch_bank(iobase, BANK0);
2203 outb(newMask, iobase+FIR_IER);
2206 outb(newMask, iobase+UART_IER);
2208 IRDA_DEBUG(2, "%s(), ----------------- End ------------------\n", __func__ );
2211 static void SIR2FIR(int iobase)
2213 //unsigned char tmp;
2215 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__ );
2217 /* Already protected (change_speed() or setup()), no need to lock.
2220 outb(0x28, iobase+UART_MCR);
2221 outb(0x68, iobase+UART_MCR);
2222 outb(0x88, iobase+UART_MCR);
2224 outb(0x60, iobase+FIR_MCR); /* Master Reset */
2225 outb(0x20, iobase+FIR_MCR); /* Master Interrupt Enable */
2227 //tmp = inb(iobase+FIR_LCR_B); /* SIP enable */
2229 //outb(tmp, iobase+FIR_LCR_B);
2231 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
2234 static void FIR2SIR(int iobase)
2238 IRDA_DEBUG(1, "%s(), ---------------- Start ----------------\n", __func__ );
2240 /* Already protected (change_speed() or setup()), no need to lock.
2243 outb(0x20, iobase+FIR_MCR); /* IRQ to low */
2244 outb(0x00, iobase+UART_IER);
2246 outb(0xA0, iobase+FIR_MCR); /* Don't set master reset */
2247 outb(0x00, iobase+UART_FCR);
2248 outb(0x07, iobase+UART_FCR);
2250 val = inb(iobase+UART_RX);
2251 val = inb(iobase+UART_LSR);
2252 val = inb(iobase+UART_MSR);
2254 IRDA_DEBUG(1, "%s(), ----------------- End ------------------\n", __func__ );
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);
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");
2270 module_init(ali_ircc_init);
2271 module_exit(ali_ircc_cleanup);