1 /*********************************************************************
5 * Description: Driver for the NSC PC'108 and PC'338 IrDA chipsets
7 * Author: Dag Brattli <dagb@cs.uit.no>
8 * Created at: Sat Nov 7 21:43:15 1998
9 * Modified at: Wed Mar 1 11:29:34 2000
10 * Modified by: Dag Brattli <dagb@cs.uit.no>
12 * Copyright (c) 1998-2000 Dag Brattli <dagb@cs.uit.no>
13 * Copyright (c) 1998 Lichen Wang, <lwang@actisys.com>
14 * Copyright (c) 1998 Actisys Corp., www.actisys.com
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 * Neither Dag Brattli nor University of Tromsø admit liability nor
23 * provide warranty for any of this software. This material is
24 * provided "AS-IS" and at no charge.
26 * Notice that all functions that needs to access the chip in _any_
27 * way, must save BSR register on entry, and restore it on exit.
28 * It is _very_ important to follow this policy!
32 * bank = inb(iobase+BSR);
34 * do_your_stuff_here();
36 * outb(bank, iobase+BSR);
38 * If you find bugs in this file, its very likely that the same bug
39 * will also be in w83977af_ir.c since the implementations are quite
42 ********************************************************************/
44 #include <linux/module.h>
46 #include <linux/kernel.h>
47 #include <linux/types.h>
48 #include <linux/skbuff.h>
49 #include <linux/netdevice.h>
50 #include <linux/ioport.h>
51 #include <linux/delay.h>
52 #include <linux/malloc.h>
53 #include <linux/init.h>
54 #include <linux/rtnetlink.h>
58 #include <asm/byteorder.h>
62 #include <net/irda/wrapper.h>
63 #include <net/irda/irda.h>
64 #include <net/irda/irmod.h>
65 #include <net/irda/irlap_frame.h>
66 #include <net/irda/irda_device.h>
68 #include <net/irda/nsc-ircc.h>
70 #define CHIP_IO_EXTENT 8
71 #define BROKEN_DONGLE_ID
73 static char *driver_name
= "nsc-ircc";
75 /* Module parameters */
76 static int qos_mtt_bits
= 0x07; /* 1 ms or more */
79 /* Use BIOS settions by default, but user may supply module parameters */
80 static unsigned int io
[] = { ~0, ~0, ~0, ~0 };
81 static unsigned int irq
[] = { 0, 0, 0, 0, 0 };
82 static unsigned int dma
[] = { 0, 0, 0, 0, 0 };
84 static int nsc_ircc_probe_108(nsc_chip_t
*chip
, chipio_t
*info
);
85 static int nsc_ircc_probe_338(nsc_chip_t
*chip
, chipio_t
*info
);
86 static int nsc_ircc_init_108(nsc_chip_t
*chip
, chipio_t
*info
);
87 static int nsc_ircc_init_338(nsc_chip_t
*chip
, chipio_t
*info
);
89 /* These are the known NSC chips */
90 static nsc_chip_t chips
[] = {
91 { "PC87108", { 0x150, 0x398, 0xea }, 0x05, 0x10, 0xf0,
92 nsc_ircc_probe_108
, nsc_ircc_init_108
},
93 { "PC87338", { 0x398, 0x15c, 0x2e }, 0x08, 0xb0, 0xf0,
94 nsc_ircc_probe_338
, nsc_ircc_init_338
},
98 /* Max 4 instances for now */
99 static struct nsc_ircc_cb
*dev_self
[] = { NULL
, NULL
, NULL
, NULL
};
101 static char *dongle_types
[] = {
102 "Differential serial interface",
103 "Differential serial interface",
108 "Single-ended serial interface",
110 "HP HSDL-2300, HP HSDL-3600/HSDL-3610",
111 "IBM31T1100 or Temic TFDS6000/TFDS6500",
114 "HP HSDL-1100/HSDL-2100",
115 "HP HSDL-1100/HSDL-2100"
116 "Supports SIR Mode only",
117 "No dongle connected",
120 /* Some prototypes */
121 static int nsc_ircc_open(int i
, chipio_t
*info
);
123 static int nsc_ircc_close(struct nsc_ircc_cb
*self
);
125 static int nsc_ircc_setup(chipio_t
*info
);
126 static void nsc_ircc_pio_receive(struct nsc_ircc_cb
*self
);
127 static int nsc_ircc_dma_receive(struct nsc_ircc_cb
*self
);
128 static int nsc_ircc_dma_receive_complete(struct nsc_ircc_cb
*self
, int iobase
);
129 static int nsc_ircc_hard_xmit_sir(struct sk_buff
*skb
, struct net_device
*dev
);
130 static int nsc_ircc_hard_xmit_fir(struct sk_buff
*skb
, struct net_device
*dev
);
131 static int nsc_ircc_pio_write(int iobase
, __u8
*buf
, int len
, int fifo_size
);
132 static void nsc_ircc_dma_xmit(struct nsc_ircc_cb
*self
, int iobase
);
133 static void nsc_ircc_change_speed(struct nsc_ircc_cb
*self
, __u32 baud
);
134 static void nsc_ircc_interrupt(int irq
, void *dev_id
, struct pt_regs
*regs
);
135 static int nsc_ircc_is_receiving(struct nsc_ircc_cb
*self
);
136 static int nsc_ircc_read_dongle_id (int iobase
);
137 static void nsc_ircc_init_dongle_interface (int iobase
, int dongle_id
);
139 static int nsc_ircc_net_init(struct net_device
*dev
);
140 static int nsc_ircc_net_open(struct net_device
*dev
);
141 static int nsc_ircc_net_close(struct net_device
*dev
);
142 static int nsc_ircc_net_ioctl(struct net_device
*dev
, struct ifreq
*rq
, int cmd
);
143 static struct net_device_stats
*nsc_ircc_net_get_stats(struct net_device
*dev
);
144 static int nsc_ircc_pmproc(struct pm_dev
*dev
, pm_request_t rqst
, void *data
);
147 * Function nsc_ircc_init ()
149 * Initialize chip. Just try to find out how many chips we are dealing with
152 int __init
nsc_ircc_init(void)
162 /* Probe for all the NSC chipsets we know about */
163 for (chip
=chips
; chip
->name
; chip
++,i
++) {
164 IRDA_DEBUG(2, __FUNCTION__
"(), Probing for %s ...\n",
167 /* Try all config registers for this chip */
168 for (cfg
=0; cfg
<3; cfg
++) {
169 cfg_base
= chip
->cfg
[cfg
];
173 memset(&info
, 0, sizeof(chipio_t
));
174 info
.cfg_base
= cfg_base
;
175 info
.fir_base
= io
[i
];
179 /* Read index register */
182 IRDA_DEBUG(2, __FUNCTION__
183 "() no chip at 0x%03x\n", cfg_base
);
187 /* Read chip identification register */
188 outb(chip
->cid_index
, cfg_base
);
189 id
= inb(cfg_base
+1);
190 if ((id
& chip
->cid_mask
) == chip
->cid_value
) {
191 IRDA_DEBUG(2, __FUNCTION__
192 "() Found %s chip, revision=%d\n",
193 chip
->name
, id
& ~chip
->cid_mask
);
195 * If the user supplies the base address, then
196 * we init the chip, if not we probe the values
200 chip
->init(chip
, &info
);
202 chip
->probe(chip
, &info
);
204 if (nsc_ircc_open(i
, &info
) == 0)
208 IRDA_DEBUG(2, __FUNCTION__
209 "(), Wrong chip id=0x%02x\n", id
);
219 * Function nsc_ircc_cleanup ()
221 * Close all configured chips
225 static void nsc_ircc_cleanup(void)
229 pm_unregister_all(nsc_ircc_pmproc
);
231 for (i
=0; i
< 4; i
++) {
233 nsc_ircc_close(dev_self
[i
]);
239 * Function nsc_ircc_open (iobase, irq)
241 * Open driver instance
244 static int nsc_ircc_open(int i
, chipio_t
*info
)
246 struct net_device
*dev
;
247 struct nsc_ircc_cb
*self
;
248 struct pm_dev
*pmdev
;
252 IRDA_DEBUG(2, __FUNCTION__
"()\n");
254 if ((nsc_ircc_setup(info
)) == -1)
257 /* Allocate new instance of the driver */
258 self
= kmalloc(sizeof(struct nsc_ircc_cb
), GFP_KERNEL
);
260 ERROR(__FUNCTION__
"(), can't allocate memory for "
264 memset(self
, 0, sizeof(struct nsc_ircc_cb
));
265 spin_lock_init(&self
->lock
);
267 /* Need to store self somewhere */
272 self
->io
.cfg_base
= info
->cfg_base
;
273 self
->io
.fir_base
= info
->fir_base
;
274 self
->io
.irq
= info
->irq
;
275 self
->io
.fir_ext
= CHIP_IO_EXTENT
;
276 self
->io
.dma
= info
->dma
;
277 self
->io
.fifo_size
= 32;
279 /* Reserve the ioports that we need */
280 ret
= check_region(self
->io
.fir_base
, self
->io
.fir_ext
);
282 WARNING(__FUNCTION__
"(), can't get iobase of 0x%03x\n",
288 request_region(self
->io
.fir_base
, self
->io
.fir_ext
, driver_name
);
290 /* Initialize QoS for this device */
291 irda_init_max_qos_capabilies(&self
->qos
);
293 /* The only value we must override it the baudrate */
294 self
->qos
.baud_rate
.bits
= IR_9600
|IR_19200
|IR_38400
|IR_57600
|
295 IR_115200
|IR_576000
|IR_1152000
|(IR_4000000
<< 8);
297 self
->qos
.min_turn_time
.bits
= qos_mtt_bits
;
298 irda_qos_bits_to_value(&self
->qos
);
300 self
->flags
= IFF_FIR
|IFF_MIR
|IFF_SIR
|IFF_DMA
|IFF_PIO
|IFF_DONGLE
;
302 /* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
303 self
->rx_buff
.truesize
= 14384;
304 self
->tx_buff
.truesize
= 14384;
306 /* Allocate memory if needed */
307 self
->rx_buff
.head
= (__u8
*) kmalloc(self
->rx_buff
.truesize
,
309 if (self
->rx_buff
.head
== NULL
) {
313 memset(self
->rx_buff
.head
, 0, self
->rx_buff
.truesize
);
315 self
->tx_buff
.head
= (__u8
*) kmalloc(self
->tx_buff
.truesize
,
317 if (self
->tx_buff
.head
== NULL
) {
319 kfree(self
->rx_buff
.head
);
322 memset(self
->tx_buff
.head
, 0, self
->tx_buff
.truesize
);
324 self
->rx_buff
.in_frame
= FALSE
;
325 self
->rx_buff
.state
= OUTSIDE_FRAME
;
326 self
->tx_buff
.data
= self
->tx_buff
.head
;
327 self
->rx_buff
.data
= self
->rx_buff
.head
;
329 /* Reset Tx queue info */
330 self
->tx_fifo
.len
= self
->tx_fifo
.ptr
= self
->tx_fifo
.free
= 0;
331 self
->tx_fifo
.tail
= self
->tx_buff
.head
;
333 if (!(dev
= dev_alloc("irda%d", &err
))) {
334 ERROR(__FUNCTION__
"(), dev_alloc() failed!\n");
338 dev
->priv
= (void *) self
;
341 /* Override the network functions we need to use */
342 dev
->init
= nsc_ircc_net_init
;
343 dev
->hard_start_xmit
= nsc_ircc_hard_xmit_sir
;
344 dev
->open
= nsc_ircc_net_open
;
345 dev
->stop
= nsc_ircc_net_close
;
346 dev
->do_ioctl
= nsc_ircc_net_ioctl
;
347 dev
->get_stats
= nsc_ircc_net_get_stats
;
350 err
= register_netdevice(dev
);
353 ERROR(__FUNCTION__
"(), register_netdev() failed!\n");
356 MESSAGE("IrDA: Registered device %s\n", dev
->name
);
358 /* Check if user has supplied the dongle id or not */
360 dongle_id
= nsc_ircc_read_dongle_id(self
->io
.fir_base
);
362 MESSAGE("%s, Found dongle: %s\n", driver_name
,
363 dongle_types
[dongle_id
]);
365 MESSAGE("%s, Using dongle: %s\n", driver_name
,
366 dongle_types
[dongle_id
]);
369 self
->io
.dongle_id
= dongle_id
;
370 nsc_ircc_init_dongle_interface(self
->io
.fir_base
, dongle_id
);
372 pmdev
= pm_register(PM_SYS_DEV
, PM_SYS_IRDA
, nsc_ircc_pmproc
);
381 * Function nsc_ircc_close (self)
383 * Close driver instance
386 static int nsc_ircc_close(struct nsc_ircc_cb
*self
)
390 IRDA_DEBUG(4, __FUNCTION__
"()\n");
392 ASSERT(self
!= NULL
, return -1;);
394 iobase
= self
->io
.fir_base
;
396 /* Remove netdevice */
399 unregister_netdevice(self
->netdev
);
403 /* Release the PORT that this driver is using */
404 IRDA_DEBUG(4, __FUNCTION__
"(), Releasing Region %03x\n",
406 release_region(self
->io
.fir_base
, self
->io
.fir_ext
);
408 if (self
->tx_buff
.head
)
409 kfree(self
->tx_buff
.head
);
411 if (self
->rx_buff
.head
)
412 kfree(self
->rx_buff
.head
);
414 dev_self
[self
->index
] = NULL
;
422 * Function nsc_ircc_init_108 (iobase, cfg_base, irq, dma)
424 * Initialize the NSC '108 chip
427 static int nsc_ircc_init_108(nsc_chip_t
*chip
, chipio_t
*info
)
429 int cfg_base
= info
->cfg_base
;
432 outb(2, cfg_base
); /* Mode Control Register (MCTL) */
433 outb(0x00, cfg_base
+1); /* Disable device */
435 /* Base Address and Interrupt Control Register (BAIC) */
437 switch (info
->fir_base
) {
438 case 0x3e8: outb(0x14, cfg_base
+1); break;
439 case 0x2e8: outb(0x15, cfg_base
+1); break;
440 case 0x3f8: outb(0x16, cfg_base
+1); break;
441 case 0x2f8: outb(0x17, cfg_base
+1); break;
442 default: ERROR(__FUNCTION__
"(), invalid base_address");
445 /* Control Signal Routing Register (CSRT) */
447 case 3: temp
= 0x01; break;
448 case 4: temp
= 0x02; break;
449 case 5: temp
= 0x03; break;
450 case 7: temp
= 0x04; break;
451 case 9: temp
= 0x05; break;
452 case 11: temp
= 0x06; break;
453 case 15: temp
= 0x07; break;
454 default: ERROR(__FUNCTION__
"(), invalid irq");
459 case 0: outb(0x08+temp
, cfg_base
+1); break;
460 case 1: outb(0x10+temp
, cfg_base
+1); break;
461 case 3: outb(0x18+temp
, cfg_base
+1); break;
462 default: ERROR(__FUNCTION__
"(), invalid dma");
465 outb(2, cfg_base
); /* Mode Control Register (MCTL) */
466 outb(0x03, cfg_base
+1); /* Enable device */
472 * Function nsc_ircc_probe_108 (chip, info)
477 static int nsc_ircc_probe_108(nsc_chip_t
*chip
, chipio_t
*info
)
479 int cfg_base
= info
->cfg_base
;
482 /* Read address and interrupt control register (BAIC) */
483 outb(CFG_BAIC
, cfg_base
);
484 reg
= inb(cfg_base
+1);
486 switch (reg
& 0x03) {
488 info
->fir_base
= 0x3e8;
491 info
->fir_base
= 0x2e8;
494 info
->fir_base
= 0x3f8;
497 info
->fir_base
= 0x2f8;
500 info
->sir_base
= info
->fir_base
;
501 IRDA_DEBUG(2, __FUNCTION__
"(), probing fir_base=0x%03x\n",
504 /* Read control signals routing register (CSRT) */
505 outb(CFG_CSRT
, cfg_base
);
506 reg
= inb(cfg_base
+1);
508 switch (reg
& 0x07) {
534 IRDA_DEBUG(2, __FUNCTION__
"(), probing irq=%d\n", info
->irq
);
536 /* Currently we only read Rx DMA but it will also be used for Tx */
537 switch ((reg
>> 3) & 0x03) {
551 IRDA_DEBUG(2, __FUNCTION__
"(), probing dma=%d\n", info
->dma
);
553 /* Read mode control register (MCTL) */
554 outb(CFG_MCTL
, cfg_base
);
555 reg
= inb(cfg_base
+1);
557 info
->enabled
= reg
& 0x01;
558 info
->suspended
= !((reg
>> 1) & 0x01);
564 * Function nsc_ircc_init_338 (chip, info)
566 * Initialize the NSC '338 chip. Remember that the 87338 needs two
567 * consecutive writes to the data registers while CPU interrupts are
568 * disabled. The 97338 does not require this, but shouldn't be any
569 * harm if we do it anyway.
571 static int nsc_ircc_init_338(nsc_chip_t
*chip
, chipio_t
*info
)
579 * Function nsc_ircc_probe_338 (chip, info)
584 static int nsc_ircc_probe_338(nsc_chip_t
*chip
, chipio_t
*info
)
586 int cfg_base
= info
->cfg_base
;
590 /* Read funtion enable register (FER) */
591 outb(CFG_FER
, cfg_base
);
592 reg
= inb(cfg_base
+1);
594 info
->enabled
= (reg
>> 2) & 0x01;
596 /* Check if we are in Legacy or PnP mode */
597 outb(CFG_PNP0
, cfg_base
);
598 reg
= inb(cfg_base
+1);
600 pnp
= (reg
>> 4) & 0x01;
602 IRDA_DEBUG(2, "(), Chip is in PnP mode\n");
603 outb(0x46, cfg_base
);
604 reg
= (inb(cfg_base
+1) & 0xfe) << 2;
606 outb(0x47, cfg_base
);
607 reg
|= ((inb(cfg_base
+1) & 0xfc) << 8);
609 info
->fir_base
= reg
;
611 /* Read function address register (FAR) */
612 outb(CFG_FAR
, cfg_base
);
613 reg
= inb(cfg_base
+1);
615 switch ((reg
>> 4) & 0x03) {
617 info
->fir_base
= 0x3f8;
620 info
->fir_base
= 0x2f8;
631 switch ((reg
>> 6) & 0x03) {
634 info
->fir_base
= 0x3e8;
636 info
->fir_base
= 0x2e8;
640 info
->fir_base
= 0x338;
642 info
->fir_base
= 0x238;
646 info
->fir_base
= 0x2e8;
648 info
->fir_base
= 0x2e0;
652 info
->fir_base
= 0x220;
654 info
->fir_base
= 0x228;
659 info
->sir_base
= info
->fir_base
;
661 /* Read PnP register 1 (PNP1) */
662 outb(CFG_PNP1
, cfg_base
);
663 reg
= inb(cfg_base
+1);
665 info
->irq
= reg
>> 4;
667 /* Read PnP register 3 (PNP3) */
668 outb(CFG_PNP3
, cfg_base
);
669 reg
= inb(cfg_base
+1);
671 info
->dma
= (reg
& 0x07) - 1;
673 /* Read power and test register (PTR) */
674 outb(CFG_PTR
, cfg_base
);
675 reg
= inb(cfg_base
+1);
677 info
->suspended
= reg
& 0x01;
683 * Function nsc_ircc_setup (info)
685 * Returns non-negative on success.
688 static int nsc_ircc_setup(chipio_t
*info
)
691 int iobase
= info
->fir_base
;
693 /* Read the Module ID */
694 switch_bank(iobase
, BANK3
);
695 version
= inb(iobase
+MID
);
698 if (0x20 != (version
& 0xf0)) {
699 ERROR("%s, Wrong chip version %02x\n", driver_name
, version
);
702 MESSAGE("%s, Found chip at base=0x%03x\n", driver_name
,
705 /* Switch to advanced mode */
706 switch_bank(iobase
, BANK2
);
707 outb(ECR1_EXT_SL
, iobase
+ECR1
);
708 switch_bank(iobase
, BANK0
);
710 /* Set FIFO threshold to TX17, RX16, reset and enable FIFO's */
711 switch_bank(iobase
, BANK0
);
712 outb(FCR_RXTH
|FCR_TXTH
|FCR_TXSR
|FCR_RXSR
|FCR_FIFO_EN
, iobase
+FCR
);
714 outb(0x03, iobase
+LCR
); /* 8 bit word length */
715 outb(MCR_SIR
, iobase
+MCR
); /* Start at SIR-mode, also clears LSR*/
717 /* Set FIFO size to 32 */
718 switch_bank(iobase
, BANK2
);
719 outb(EXCR2_RFSIZ
|EXCR2_TFSIZ
, iobase
+EXCR2
);
721 /* IRCR2: FEND_MD is not set */
722 switch_bank(iobase
, BANK5
);
723 outb(0x02, iobase
+4);
725 /* Make sure that some defaults are OK */
726 switch_bank(iobase
, BANK6
);
727 outb(0x20, iobase
+0); /* Set 32 bits FIR CRC */
728 outb(0x0a, iobase
+1); /* Set MIR pulse width */
729 outb(0x0d, iobase
+2); /* Set SIR pulse width to 1.6us */
730 outb(0x2a, iobase
+4); /* Set beginning frag, and preamble length */
732 MESSAGE("%s, driver loaded (Dag Brattli)\n", driver_name
);
734 /* Enable receive interrupts */
735 switch_bank(iobase
, BANK0
);
736 outb(IER_RXHDL_IE
, iobase
+IER
);
742 * Function nsc_ircc_read_dongle_id (void)
744 * Try to read dongle indentification. This procedure needs to be executed
745 * once after power-on/reset. It also needs to be used whenever you suspect
746 * that the user may have plugged/unplugged the IrDA Dongle.
748 static int nsc_ircc_read_dongle_id (int iobase
)
753 bank
= inb(iobase
+BSR
);
756 switch_bank(iobase
, BANK7
);
758 /* IRCFG4: IRSL0_DS and IRSL21_DS are cleared */
759 outb(0x00, iobase
+7);
761 /* ID0, 1, and 2 are pulled up/down very slowly */
764 /* IRCFG1: read the ID bits */
765 dongle_id
= inb(iobase
+4) & 0x0f;
767 #ifdef BROKEN_DONGLE_ID
768 if (dongle_id
== 0x0a)
771 /* Go back to bank 0 before returning */
772 switch_bank(iobase
, BANK0
);
774 outb(bank
, iobase
+BSR
);
780 * Function nsc_ircc_init_dongle_interface (iobase, dongle_id)
782 * This function initializes the dongle for the transceiver that is
783 * used. This procedure needs to be executed once after
784 * power-on/reset. It also needs to be used whenever you suspect that
785 * the dongle is changed.
787 static void nsc_ircc_init_dongle_interface (int iobase
, int dongle_id
)
791 /* Save current bank */
792 bank
= inb(iobase
+BSR
);
795 switch_bank(iobase
, BANK7
);
797 /* IRCFG4: set according to dongle_id */
799 case 0x00: /* same as */
800 case 0x01: /* Differential serial interface */
801 IRDA_DEBUG(0, __FUNCTION__
"(), %s not defined by irda yet\n",
802 dongle_types
[dongle_id
]);
804 case 0x02: /* same as */
805 case 0x03: /* Reserved */
806 IRDA_DEBUG(0, __FUNCTION__
"(), %s not defined by irda yet\n",
807 dongle_types
[dongle_id
]);
809 case 0x04: /* Sharp RY5HD01 */
811 case 0x05: /* Reserved, but this is what the Thinkpad reports */
812 IRDA_DEBUG(0, __FUNCTION__
"(), %s not defined by irda yet\n",
813 dongle_types
[dongle_id
]);
815 case 0x06: /* Single-ended serial interface */
816 IRDA_DEBUG(0, __FUNCTION__
"(), %s not defined by irda yet\n",
817 dongle_types
[dongle_id
]);
819 case 0x07: /* Consumer-IR only */
820 IRDA_DEBUG(0, __FUNCTION__
"(), %s is not for IrDA mode\n",
821 dongle_types
[dongle_id
]);
823 case 0x08: /* HP HSDL-2300, HP HSDL-3600/HSDL-3610 */
824 IRDA_DEBUG(0, __FUNCTION__
"(), %s\n",
825 dongle_types
[dongle_id
]);
827 case 0x09: /* IBM31T1100 or Temic TFDS6000/TFDS6500 */
828 outb(0x28, iobase
+7); /* Set irsl[0-2] as output */
830 case 0x0A: /* same as */
831 case 0x0B: /* Reserved */
832 IRDA_DEBUG(0, __FUNCTION__
"(), %s not defined by irda yet\n",
833 dongle_types
[dongle_id
]);
835 case 0x0C: /* same as */
836 case 0x0D: /* HP HSDL-1100/HSDL-2100 */
838 * Set irsl0 as input, irsl[1-2] as output, and separate
839 * inputs are used for SIR and MIR/FIR
841 outb(0x48, iobase
+7);
843 case 0x0E: /* Supports SIR Mode only */
844 outb(0x28, iobase
+7); /* Set irsl[0-2] as output */
846 case 0x0F: /* No dongle connected */
847 IRDA_DEBUG(0, __FUNCTION__
"(), %s\n",
848 dongle_types
[dongle_id
]);
850 switch_bank(iobase
, BANK0
);
851 outb(0x62, iobase
+MCR
);
854 IRDA_DEBUG(0, __FUNCTION__
"(), invalid dongle_id %#x",
858 /* IRCFG1: IRSL1 and 2 are set to IrDA mode */
859 outb(0x00, iobase
+4);
861 /* Restore bank register */
862 outb(bank
, iobase
+BSR
);
864 } /* set_up_dongle_interface */
867 * Function nsc_ircc_change_dongle_speed (iobase, speed, dongle_id)
869 * Change speed of the attach dongle
872 static void nsc_ircc_change_dongle_speed(int iobase
, int speed
, int dongle_id
)
877 /* Save current bank */
878 bank
= inb(iobase
+BSR
);
881 switch_bank(iobase
, BANK7
);
883 /* IRCFG1: set according to dongle_id */
885 case 0x00: /* same as */
886 case 0x01: /* Differential serial interface */
887 IRDA_DEBUG(0, __FUNCTION__
"(), %s not defined by irda yet\n",
888 dongle_types
[dongle_id
]);
890 case 0x02: /* same as */
891 case 0x03: /* Reserved */
892 IRDA_DEBUG(0, __FUNCTION__
"(), %s not defined by irda yet\n",
893 dongle_types
[dongle_id
]);
895 case 0x04: /* Sharp RY5HD01 */
897 case 0x05: /* Reserved */
898 IRDA_DEBUG(0, __FUNCTION__
"(), %s not defined by irda yet\n",
899 dongle_types
[dongle_id
]);
901 case 0x06: /* Single-ended serial interface */
902 IRDA_DEBUG(0, __FUNCTION__
"(), %s not defined by irda yet\n",
903 dongle_types
[dongle_id
]);
905 case 0x07: /* Consumer-IR only */
906 IRDA_DEBUG(0, __FUNCTION__
"(), %s is not for IrDA mode\n",
907 dongle_types
[dongle_id
]);
909 case 0x08: /* HP HSDL-2300, HP HSDL-3600/HSDL-3610 */
910 IRDA_DEBUG(0, __FUNCTION__
"(), %s\n",
911 dongle_types
[dongle_id
]);
912 outb(0x00, iobase
+4);
914 outb(0x01, iobase
+4);
916 case 0x09: /* IBM31T1100 or Temic TFDS6000/TFDS6500 */
917 outb(0x01, iobase
+4);
919 if (speed
== 4000000) {
922 outb(0x81, iobase
+4);
923 outb(0x80, iobase
+4);
924 restore_flags(flags
);
926 outb(0x00, iobase
+4);
928 case 0x0A: /* same as */
929 case 0x0B: /* Reserved */
930 IRDA_DEBUG(0, __FUNCTION__
"(), %s not defined by irda yet\n",
931 dongle_types
[dongle_id
]);
933 case 0x0C: /* same as */
934 case 0x0D: /* HP HSDL-1100/HSDL-2100 */
936 case 0x0E: /* Supports SIR Mode only */
938 case 0x0F: /* No dongle connected */
939 IRDA_DEBUG(0, __FUNCTION__
"(), %s is not for IrDA mode\n",
940 dongle_types
[dongle_id
]);
942 switch_bank(iobase
, BANK0
);
943 outb(0x62, iobase
+MCR
);
946 IRDA_DEBUG(0, __FUNCTION__
"(), invalid data_rate\n");
948 /* Restore bank register */
949 outb(bank
, iobase
+BSR
);
953 * Function nsc_ircc_change_speed (self, baud)
955 * Change the speed of the device
958 static void nsc_ircc_change_speed(struct nsc_ircc_cb
*self
, __u32 speed
)
960 struct net_device
*dev
= self
->netdev
;
965 IRDA_DEBUG(2, __FUNCTION__
"(), speed=%d\n", speed
);
967 ASSERT(self
!= NULL
, return;);
969 iobase
= self
->io
.fir_base
;
971 /* Update accounting for new speed */
972 self
->io
.speed
= speed
;
974 /* Save current bank */
975 bank
= inb(iobase
+BSR
);
977 /* Disable interrupts */
978 switch_bank(iobase
, BANK0
);
982 switch_bank(iobase
, BANK2
);
984 outb(0x00, iobase
+BGDH
);
986 case 9600: outb(0x0c, iobase
+BGDL
); break;
987 case 19200: outb(0x06, iobase
+BGDL
); break;
988 case 38400: outb(0x03, iobase
+BGDL
); break;
989 case 57600: outb(0x02, iobase
+BGDL
); break;
990 case 115200: outb(0x01, iobase
+BGDL
); break;
992 switch_bank(iobase
, BANK5
);
994 /* IRCR2: MDRS is set */
995 outb(inb(iobase
+4) | 0x04, iobase
+4);
998 IRDA_DEBUG(0, __FUNCTION__
"(), handling baud of 576000\n");
1002 IRDA_DEBUG(0, __FUNCTION__
"(), handling baud of 1152000\n");
1006 IRDA_DEBUG(0, __FUNCTION__
"(), handling baud of 4000000\n");
1010 IRDA_DEBUG(0, __FUNCTION__
"(), unknown baud rate of %d\n",
1015 /* Set appropriate speed mode */
1016 switch_bank(iobase
, BANK0
);
1017 outb(mcr
| MCR_TX_DFR
, iobase
+MCR
);
1019 /* Give some hits to the transceiver */
1020 nsc_ircc_change_dongle_speed(iobase
, speed
, self
->io
.dongle_id
);
1022 /* Set FIFO threshold to TX17, RX16 */
1023 switch_bank(iobase
, BANK0
);
1024 outb(0x00, iobase
+FCR
);
1025 outb(FCR_FIFO_EN
, iobase
+FCR
);
1026 outb(FCR_RXTH
| /* Set Rx FIFO threshold */
1027 FCR_TXTH
| /* Set Tx FIFO threshold */
1028 FCR_TXSR
| /* Reset Tx FIFO */
1029 FCR_RXSR
| /* Reset Rx FIFO */
1030 FCR_FIFO_EN
, /* Enable FIFOs */
1033 /* Set FIFO size to 32 */
1034 switch_bank(iobase
, BANK2
);
1035 outb(EXCR2_RFSIZ
|EXCR2_TFSIZ
, iobase
+EXCR2
);
1037 /* Enable some interrupts so we can receive frames */
1038 switch_bank(iobase
, BANK0
);
1039 if (speed
> 115200) {
1040 /* Install FIR xmit handler */
1041 dev
->hard_start_xmit
= nsc_ircc_hard_xmit_fir
;
1042 outb(IER_SFIF_IE
, iobase
+IER
);
1043 nsc_ircc_dma_receive(self
);
1045 /* Install SIR xmit handler */
1046 dev
->hard_start_xmit
= nsc_ircc_hard_xmit_sir
;
1047 outb(IER_RXHDL_IE
, iobase
+IER
);
1051 outb(bank
, iobase
+BSR
);
1052 netif_wake_queue(dev
);
1057 * Function nsc_ircc_hard_xmit (skb, dev)
1059 * Transmit the frame!
1062 static int nsc_ircc_hard_xmit_sir(struct sk_buff
*skb
, struct net_device
*dev
)
1064 struct nsc_ircc_cb
*self
;
1065 unsigned long flags
;
1070 self
= (struct nsc_ircc_cb
*) dev
->priv
;
1072 ASSERT(self
!= NULL
, return 0;);
1074 iobase
= self
->io
.fir_base
;
1076 netif_stop_queue(dev
);
1078 /* Check if we need to change the speed */
1079 if ((speed
= irda_get_speed(skb
)) != self
->io
.speed
) {
1080 /* Check for empty frame */
1082 nsc_ircc_change_speed(self
, speed
);
1085 self
->new_speed
= speed
;
1088 spin_lock_irqsave(&self
->lock
, flags
);
1090 /* Save current bank */
1091 bank
= inb(iobase
+BSR
);
1093 self
->tx_buff
.data
= self
->tx_buff
.head
;
1095 self
->tx_buff
.len
= async_wrap_skb(skb
, self
->tx_buff
.data
,
1096 self
->tx_buff
.truesize
);
1098 self
->stats
.tx_bytes
+= self
->tx_buff
.len
;
1100 /* Add interrupt on tx low level (will fire immediately) */
1101 switch_bank(iobase
, BANK0
);
1102 outb(IER_TXLDL_IE
, iobase
+IER
);
1104 /* Restore bank register */
1105 outb(bank
, iobase
+BSR
);
1107 spin_unlock_irqrestore(&self
->lock
, flags
);
1114 static int nsc_ircc_hard_xmit_fir(struct sk_buff
*skb
, struct net_device
*dev
)
1116 struct nsc_ircc_cb
*self
;
1117 unsigned long flags
;
1123 self
= (struct nsc_ircc_cb
*) dev
->priv
;
1124 iobase
= self
->io
.fir_base
;
1126 netif_stop_queue(dev
);
1128 /* Check if we need to change the speed */
1129 if ((speed
= irda_get_speed(skb
)) != self
->io
.speed
) {
1130 /* Check for empty frame */
1132 nsc_ircc_change_speed(self
, speed
);
1135 self
->new_speed
= speed
;
1138 spin_lock_irqsave(&self
->lock
, flags
);
1140 /* Save current bank */
1141 bank
= inb(iobase
+BSR
);
1143 /* Register and copy this frame to DMA memory */
1144 self
->tx_fifo
.queue
[self
->tx_fifo
.free
].start
= self
->tx_fifo
.tail
;
1145 self
->tx_fifo
.queue
[self
->tx_fifo
.free
].len
= skb
->len
;
1146 self
->tx_fifo
.tail
+= skb
->len
;
1148 self
->stats
.tx_bytes
+= skb
->len
;
1150 memcpy(self
->tx_fifo
.queue
[self
->tx_fifo
.free
].start
, skb
->data
,
1153 self
->tx_fifo
.len
++;
1154 self
->tx_fifo
.free
++;
1156 /* Start transmit only if there is currently no transmit going on */
1157 if (self
->tx_fifo
.len
== 1) {
1158 /* Check if we must wait the min turn time or not */
1159 mtt
= irda_get_mtt(skb
);
1161 /* Check how much time we have used already */
1162 get_fast_time(&self
->now
);
1163 diff
= self
->now
.tv_usec
- self
->stamp
.tv_usec
;
1167 /* Check if the mtt is larger than the time we have
1168 * already used by all the protocol processing
1174 * Use timer if delay larger than 125 us, and
1175 * use udelay for smaller values which should
1179 /* Adjust for timer resolution */
1183 switch_bank(iobase
, BANK4
);
1184 outb(mtt
& 0xff, iobase
+TMRL
);
1185 outb((mtt
>> 8) & 0x0f, iobase
+TMRH
);
1188 outb(IRCR1_TMR_EN
, iobase
+IRCR1
);
1189 self
->io
.direction
= IO_XMIT
;
1191 /* Enable timer interrupt */
1192 switch_bank(iobase
, BANK0
);
1193 outb(IER_TMR_IE
, iobase
+IER
);
1195 /* Timer will take care of the rest */
1201 /* Enable DMA interrupt */
1202 switch_bank(iobase
, BANK0
);
1203 outb(IER_DMA_IE
, iobase
+IER
);
1205 /* Transmit frame */
1206 nsc_ircc_dma_xmit(self
, iobase
);
1209 /* Not busy transmitting anymore if window is not full */
1210 if (self
->tx_fifo
.free
< MAX_TX_WINDOW
)
1211 netif_wake_queue(self
->netdev
);
1213 /* Restore bank register */
1214 outb(bank
, iobase
+BSR
);
1216 spin_unlock_irqrestore(&self
->lock
, flags
);
1223 * Function nsc_ircc_dma_xmit (self, iobase)
1225 * Transmit data using DMA
1228 static void nsc_ircc_dma_xmit(struct nsc_ircc_cb
*self
, int iobase
)
1232 /* Save current bank */
1233 bsr
= inb(iobase
+BSR
);
1236 switch_bank(iobase
, BANK0
);
1237 outb(inb(iobase
+MCR
) & ~MCR_DMA_EN
, iobase
+MCR
);
1239 self
->io
.direction
= IO_XMIT
;
1241 /* Choose transmit DMA channel */
1242 switch_bank(iobase
, BANK2
);
1243 outb(ECR1_DMASWP
|ECR1_DMANF
|ECR1_EXT_SL
, iobase
+ECR1
);
1245 setup_dma(self
->io
.dma
,
1246 self
->tx_fifo
.queue
[self
->tx_fifo
.ptr
].start
,
1247 self
->tx_fifo
.queue
[self
->tx_fifo
.ptr
].len
,
1250 /* Enable DMA and SIR interaction pulse */
1251 switch_bank(iobase
, BANK0
);
1252 outb(inb(iobase
+MCR
)|MCR_TX_DFR
|MCR_DMA_EN
|MCR_IR_PLS
, iobase
+MCR
);
1254 /* Restore bank register */
1255 outb(bsr
, iobase
+BSR
);
1259 * Function nsc_ircc_pio_xmit (self, iobase)
1261 * Transmit data using PIO. Returns the number of bytes that actually
1265 static int nsc_ircc_pio_write(int iobase
, __u8
*buf
, int len
, int fifo_size
)
1270 IRDA_DEBUG(4, __FUNCTION__
"()\n");
1272 /* Save current bank */
1273 bank
= inb(iobase
+BSR
);
1275 switch_bank(iobase
, BANK0
);
1276 if (!(inb_p(iobase
+LSR
) & LSR_TXEMP
)) {
1277 IRDA_DEBUG(4, __FUNCTION__
1278 "(), warning, FIFO not empty yet!\n");
1280 /* FIFO may still be filled to the Tx interrupt threshold */
1284 /* Fill FIFO with current frame */
1285 while ((fifo_size
-- > 0) && (actual
< len
)) {
1286 /* Transmit next byte */
1287 outb(buf
[actual
++], iobase
+TXD
);
1290 IRDA_DEBUG(4, __FUNCTION__
"(), fifo_size %d ; %d sent of %d\n",
1291 fifo_size
, actual
, len
);
1294 outb(bank
, iobase
+BSR
);
1300 * Function nsc_ircc_dma_xmit_complete (self)
1302 * The transfer of a frame in finished. This function will only be called
1303 * by the interrupt handler
1306 static int nsc_ircc_dma_xmit_complete(struct nsc_ircc_cb
*self
)
1312 IRDA_DEBUG(2, __FUNCTION__
"()\n");
1314 iobase
= self
->io
.fir_base
;
1316 /* Save current bank */
1317 bank
= inb(iobase
+BSR
);
1320 switch_bank(iobase
, BANK0
);
1321 outb(inb(iobase
+MCR
) & ~MCR_DMA_EN
, iobase
+MCR
);
1323 /* Check for underrrun! */
1324 if (inb(iobase
+ASCR
) & ASCR_TXUR
) {
1325 self
->stats
.tx_errors
++;
1326 self
->stats
.tx_fifo_errors
++;
1328 /* Clear bit, by writing 1 into it */
1329 outb(ASCR_TXUR
, iobase
+ASCR
);
1331 self
->stats
.tx_packets
++;
1334 /* Check if we need to change the speed */
1335 if (self
->new_speed
) {
1336 nsc_ircc_change_speed(self
, self
->new_speed
);
1337 self
->new_speed
= 0;
1340 /* Finished with this frame, so prepare for next */
1341 self
->tx_fifo
.ptr
++;
1342 self
->tx_fifo
.len
--;
1344 /* Any frames to be sent back-to-back? */
1345 if (self
->tx_fifo
.len
) {
1346 nsc_ircc_dma_xmit(self
, iobase
);
1348 /* Not finished yet! */
1351 /* Reset Tx FIFO info */
1352 self
->tx_fifo
.len
= self
->tx_fifo
.ptr
= self
->tx_fifo
.free
= 0;
1353 self
->tx_fifo
.tail
= self
->tx_buff
.head
;
1356 /* Make sure we have room for more frames */
1357 if (self
->tx_fifo
.free
< MAX_TX_WINDOW
) {
1358 /* Not busy transmitting anymore */
1359 /* Tell the network layer, that we can accept more frames */
1360 netif_wake_queue(self
->netdev
);
1364 outb(bank
, iobase
+BSR
);
1370 * Function nsc_ircc_dma_receive (self)
1372 * Get ready for receiving a frame. The device will initiate a DMA
1373 * if it starts to receive a frame.
1376 static int nsc_ircc_dma_receive(struct nsc_ircc_cb
*self
)
1381 iobase
= self
->io
.fir_base
;
1383 /* Reset Tx FIFO info */
1384 self
->tx_fifo
.len
= self
->tx_fifo
.ptr
= self
->tx_fifo
.free
= 0;
1385 self
->tx_fifo
.tail
= self
->tx_buff
.head
;
1387 /* Save current bank */
1388 bsr
= inb(iobase
+BSR
);
1391 switch_bank(iobase
, BANK0
);
1392 outb(inb(iobase
+MCR
) & ~MCR_DMA_EN
, iobase
+MCR
);
1394 /* Choose DMA Rx, DMA Fairness, and Advanced mode */
1395 switch_bank(iobase
, BANK2
);
1396 outb(ECR1_DMANF
|ECR1_EXT_SL
, iobase
+ECR1
);
1398 self
->io
.direction
= IO_RECV
;
1399 self
->rx_buff
.data
= self
->rx_buff
.head
;
1401 /* Reset Rx FIFO. This will also flush the ST_FIFO */
1402 switch_bank(iobase
, BANK0
);
1403 outb(FCR_RXSR
|FCR_FIFO_EN
, iobase
+FCR
);
1405 self
->st_fifo
.len
= self
->st_fifo
.pending_bytes
= 0;
1406 self
->st_fifo
.tail
= self
->st_fifo
.head
= 0;
1408 setup_dma(self
->io
.dma
, self
->rx_buff
.data
, self
->rx_buff
.truesize
,
1412 switch_bank(iobase
, BANK0
);
1413 outb(inb(iobase
+MCR
)|MCR_DMA_EN
, iobase
+MCR
);
1415 /* Restore bank register */
1416 outb(bsr
, iobase
+BSR
);
1422 * Function nsc_ircc_dma_receive_complete (self)
1424 * Finished with receiving frames
1428 static int nsc_ircc_dma_receive_complete(struct nsc_ircc_cb
*self
, int iobase
)
1430 struct st_fifo
*st_fifo
;
1431 struct sk_buff
*skb
;
1436 st_fifo
= &self
->st_fifo
;
1438 /* Save current bank */
1439 bank
= inb(iobase
+BSR
);
1441 /* Read all entries in status FIFO */
1442 switch_bank(iobase
, BANK5
);
1443 while ((status
= inb(iobase
+FRM_ST
)) & FRM_ST_VLD
) {
1444 /* We must empty the status FIFO no matter what */
1445 len
= inb(iobase
+RFLFL
) | ((inb(iobase
+RFLFH
) & 0x1f) << 8);
1447 if (st_fifo
->tail
>= MAX_RX_WINDOW
) {
1448 IRDA_DEBUG(0, __FUNCTION__
"(), window is full!\n");
1452 st_fifo
->entries
[st_fifo
->tail
].status
= status
;
1453 st_fifo
->entries
[st_fifo
->tail
].len
= len
;
1454 st_fifo
->pending_bytes
+= len
;
1458 /* Try to process all entries in status FIFO */
1459 while (st_fifo
->len
> 0) {
1460 /* Get first entry */
1461 status
= st_fifo
->entries
[st_fifo
->head
].status
;
1462 len
= st_fifo
->entries
[st_fifo
->head
].len
;
1463 st_fifo
->pending_bytes
-= len
;
1467 /* Check for errors */
1468 if (status
& FRM_ST_ERR_MSK
) {
1469 if (status
& FRM_ST_LOST_FR
) {
1470 /* Add number of lost frames to stats */
1471 self
->stats
.rx_errors
+= len
;
1474 self
->stats
.rx_errors
++;
1476 self
->rx_buff
.data
+= len
;
1478 if (status
& FRM_ST_MAX_LEN
)
1479 self
->stats
.rx_length_errors
++;
1481 if (status
& FRM_ST_PHY_ERR
)
1482 self
->stats
.rx_frame_errors
++;
1484 if (status
& FRM_ST_BAD_CRC
)
1485 self
->stats
.rx_crc_errors
++;
1487 /* The errors below can be reported in both cases */
1488 if (status
& FRM_ST_OVR1
)
1489 self
->stats
.rx_fifo_errors
++;
1491 if (status
& FRM_ST_OVR2
)
1492 self
->stats
.rx_fifo_errors
++;
1495 * First we must make sure that the frame we
1496 * want to deliver is all in main memory. If we
1497 * cannot tell, then we check if the Rx FIFO is
1498 * empty. If not then we will have to take a nap
1499 * and try again later.
1501 if (st_fifo
->pending_bytes
< self
->io
.fifo_size
) {
1502 switch_bank(iobase
, BANK0
);
1503 if (inb(iobase
+LSR
) & LSR_RXDA
) {
1504 /* Put this entry back in fifo */
1507 st_fifo
->pending_bytes
+= len
;
1508 st_fifo
->entries
[st_fifo
->head
].status
= status
;
1509 st_fifo
->entries
[st_fifo
->head
].len
= len
;
1511 * DMA not finished yet, so try again
1512 * later, set timer value, resolution
1515 switch_bank(iobase
, BANK4
);
1516 outb(0x02, iobase
+TMRL
); /* x 125 us */
1517 outb(0x00, iobase
+TMRH
);
1520 outb(IRCR1_TMR_EN
, iobase
+IRCR1
);
1522 /* Restore bank register */
1523 outb(bank
, iobase
+BSR
);
1525 return FALSE
; /* I'll be back! */
1530 * Remember the time we received this frame, so we can
1531 * reduce the min turn time a bit since we will know
1532 * how much time we have used for protocol processing
1534 get_fast_time(&self
->stamp
);
1536 skb
= dev_alloc_skb(len
+1);
1538 WARNING(__FUNCTION__
"(), memory squeeze, "
1539 "dropping frame.\n");
1540 self
->stats
.rx_dropped
++;
1542 /* Restore bank register */
1543 outb(bank
, iobase
+BSR
);
1548 /* Make sure IP header gets aligned */
1549 skb_reserve(skb
, 1);
1551 /* Copy frame without CRC */
1552 if (self
->io
.speed
< 4000000) {
1553 skb_put(skb
, len
-2);
1554 memcpy(skb
->data
, self
->rx_buff
.data
, len
-2);
1556 skb_put(skb
, len
-4);
1557 memcpy(skb
->data
, self
->rx_buff
.data
, len
-4);
1560 /* Move to next frame */
1561 self
->rx_buff
.data
+= len
;
1562 self
->stats
.rx_bytes
+= len
;
1563 self
->stats
.rx_packets
++;
1565 skb
->dev
= self
->netdev
;
1566 skb
->mac
.raw
= skb
->data
;
1567 skb
->protocol
= htons(ETH_P_IRDA
);
1571 /* Restore bank register */
1572 outb(bank
, iobase
+BSR
);
1578 * Function nsc_ircc_pio_receive (self)
1580 * Receive all data in receiver FIFO
1583 static void nsc_ircc_pio_receive(struct nsc_ircc_cb
*self
)
1588 iobase
= self
->io
.fir_base
;
1590 /* Receive all characters in Rx FIFO */
1592 byte
= inb(iobase
+RXD
);
1593 async_unwrap_char(self
->netdev
, &self
->stats
, &self
->rx_buff
,
1595 } while (inb(iobase
+LSR
) & LSR_RXDA
); /* Data available */
1599 * Function nsc_ircc_sir_interrupt (self, eir)
1601 * Handle SIR interrupt
1604 static void nsc_ircc_sir_interrupt(struct nsc_ircc_cb
*self
, int eir
)
1608 /* Check if transmit FIFO is low on data */
1609 if (eir
& EIR_TXLDL_EV
) {
1610 /* Write data left in transmit buffer */
1611 actual
= nsc_ircc_pio_write(self
->io
.fir_base
,
1614 self
->io
.fifo_size
);
1615 self
->tx_buff
.data
+= actual
;
1616 self
->tx_buff
.len
-= actual
;
1618 self
->io
.direction
= IO_XMIT
;
1620 /* Check if finished */
1621 if (self
->tx_buff
.len
> 0)
1622 self
->ier
= IER_TXLDL_IE
;
1625 self
->stats
.tx_packets
++;
1626 netif_wake_queue(self
->netdev
);
1627 self
->ier
= IER_TXEMP_IE
;
1631 /* Check if transmission has completed */
1632 if (eir
& EIR_TXEMP_EV
) {
1633 /* Check if we need to change the speed? */
1634 if (self
->new_speed
) {
1635 IRDA_DEBUG(2, __FUNCTION__
"(), Changing speed!\n");
1636 nsc_ircc_change_speed(self
, self
->new_speed
);
1637 self
->new_speed
= 0;
1639 /* Check if we are going to FIR */
1640 if (self
->io
.speed
> 115200) {
1641 /* Should wait for status FIFO interrupt */
1642 self
->ier
= IER_SFIF_IE
;
1644 /* No need to do anymore SIR stuff */
1648 /* Turn around and get ready to receive some data */
1649 self
->io
.direction
= IO_RECV
;
1650 self
->ier
= IER_RXHDL_IE
;
1653 /* Rx FIFO threshold or timeout */
1654 if (eir
& EIR_RXHDL_EV
) {
1655 nsc_ircc_pio_receive(self
);
1657 /* Keep receiving */
1658 self
->ier
= IER_RXHDL_IE
;
1663 * Function nsc_ircc_fir_interrupt (self, eir)
1665 * Handle MIR/FIR interrupt
1668 static void nsc_ircc_fir_interrupt(struct nsc_ircc_cb
*self
, int iobase
,
1673 bank
= inb(iobase
+BSR
);
1675 /* Status FIFO event*/
1676 if (eir
& EIR_SFIF_EV
) {
1677 /* Check if DMA has finished */
1678 if (nsc_ircc_dma_receive_complete(self
, iobase
)) {
1679 /* Wait for next status FIFO interrupt */
1680 self
->ier
= IER_SFIF_IE
;
1682 self
->ier
= IER_SFIF_IE
| IER_TMR_IE
;
1684 } else if (eir
& EIR_TMR_EV
) { /* Timer finished */
1686 switch_bank(iobase
, BANK4
);
1687 outb(0, iobase
+IRCR1
);
1689 /* Clear timer event */
1690 switch_bank(iobase
, BANK0
);
1691 outb(ASCR_CTE
, iobase
+ASCR
);
1693 /* Check if this is a Tx timer interrupt */
1694 if (self
->io
.direction
== IO_XMIT
) {
1695 nsc_ircc_dma_xmit(self
, iobase
);
1697 /* Interrupt on DMA */
1698 self
->ier
= IER_DMA_IE
;
1700 /* Check (again) if DMA has finished */
1701 if (nsc_ircc_dma_receive_complete(self
, iobase
)) {
1702 self
->ier
= IER_SFIF_IE
;
1704 self
->ier
= IER_SFIF_IE
| IER_TMR_IE
;
1707 } else if (eir
& EIR_DMA_EV
) {
1708 /* Finished with all transmissions? */
1709 if (nsc_ircc_dma_xmit_complete(self
)) {
1710 /* Check if there are more frames to be transmitted */
1711 if (irda_device_txqueue_empty(self
->netdev
)) {
1712 /* Prepare for receive */
1713 nsc_ircc_dma_receive(self
);
1715 self
->ier
= IER_SFIF_IE
;
1718 /* Not finished yet, so interrupt on DMA again */
1719 self
->ier
= IER_DMA_IE
;
1722 outb(bank
, iobase
+BSR
);
1726 * Function nsc_ircc_interrupt (irq, dev_id, regs)
1728 * An interrupt from the chip has arrived. Time to do some work
1731 static void nsc_ircc_interrupt(int irq
, void *dev_id
, struct pt_regs
*regs
)
1733 struct net_device
*dev
= (struct net_device
*) dev_id
;
1734 struct nsc_ircc_cb
*self
;
1739 WARNING("%s: irq %d for unknown device.\n", driver_name
, irq
);
1742 self
= (struct nsc_ircc_cb
*) dev
->priv
;
1744 spin_lock(&self
->lock
);
1746 iobase
= self
->io
.fir_base
;
1748 bsr
= inb(iobase
+BSR
); /* Save current bank */
1750 switch_bank(iobase
, BANK0
);
1751 self
->ier
= inb(iobase
+IER
);
1752 eir
= inb(iobase
+EIR
) & self
->ier
; /* Mask out the interesting ones */
1754 outb(0, iobase
+IER
); /* Disable interrupts */
1757 /* Dispatch interrupt handler for the current speed */
1758 if (self
->io
.speed
> 115200)
1759 nsc_ircc_fir_interrupt(self
, iobase
, eir
);
1761 nsc_ircc_sir_interrupt(self
, eir
);
1764 outb(self
->ier
, iobase
+IER
); /* Restore interrupts */
1765 outb(bsr
, iobase
+BSR
); /* Restore bank register */
1767 spin_unlock(&self
->lock
);
1771 * Function nsc_ircc_is_receiving (self)
1773 * Return TRUE is we are currently receiving a frame
1776 static int nsc_ircc_is_receiving(struct nsc_ircc_cb
*self
)
1778 unsigned long flags
;
1783 ASSERT(self
!= NULL
, return FALSE
;);
1785 spin_lock_irqsave(&self
->lock
, flags
);
1787 if (self
->io
.speed
> 115200) {
1788 iobase
= self
->io
.fir_base
;
1790 /* Check if rx FIFO is not empty */
1791 bank
= inb(iobase
+BSR
);
1792 switch_bank(iobase
, BANK2
);
1793 if ((inb(iobase
+RXFLV
) & 0x3f) != 0) {
1794 /* We are receiving something */
1797 outb(bank
, iobase
+BSR
);
1799 status
= (self
->rx_buff
.state
!= OUTSIDE_FRAME
);
1801 spin_unlock_irqrestore(&self
->lock
, flags
);
1807 * Function nsc_ircc_net_init (dev)
1809 * Initialize network device
1812 static int nsc_ircc_net_init(struct net_device
*dev
)
1814 IRDA_DEBUG(4, __FUNCTION__
"()\n");
1816 /* Setup to be a normal IrDA network device driver */
1817 irda_device_setup(dev
);
1819 /* Insert overrides below this line! */
1825 * Function nsc_ircc_net_open (dev)
1830 static int nsc_ircc_net_open(struct net_device
*dev
)
1832 struct nsc_ircc_cb
*self
;
1836 IRDA_DEBUG(4, __FUNCTION__
"()\n");
1838 ASSERT(dev
!= NULL
, return -1;);
1839 self
= (struct nsc_ircc_cb
*) dev
->priv
;
1841 ASSERT(self
!= NULL
, return 0;);
1843 iobase
= self
->io
.fir_base
;
1845 if (request_irq(self
->io
.irq
, nsc_ircc_interrupt
, 0, dev
->name
, dev
)) {
1846 WARNING("%s, unable to allocate irq=%d\n", driver_name
,
1851 * Always allocate the DMA channel after the IRQ, and clean up on
1854 if (request_dma(self
->io
.dma
, dev
->name
)) {
1855 WARNING("%s, unable to allocate dma=%d\n", driver_name
,
1857 free_irq(self
->io
.irq
, self
);
1861 /* Save current bank */
1862 bank
= inb(iobase
+BSR
);
1864 /* turn on interrupts */
1865 switch_bank(iobase
, BANK0
);
1866 outb(IER_LS_IE
| IER_RXHDL_IE
, iobase
+IER
);
1868 /* Restore bank register */
1869 outb(bank
, iobase
+BSR
);
1871 /* Ready to play! */
1873 netif_start_queue(dev
);
1876 * Open new IrLAP layer instance, now that everything should be
1877 * initialized properly
1879 self
->irlap
= irlap_open(dev
, &self
->qos
);
1887 * Function nsc_ircc_net_close (dev)
1892 static int nsc_ircc_net_close(struct net_device
*dev
)
1894 struct nsc_ircc_cb
*self
;
1898 IRDA_DEBUG(4, __FUNCTION__
"()\n");
1900 ASSERT(dev
!= NULL
, return -1;);
1902 self
= (struct nsc_ircc_cb
*) dev
->priv
;
1903 ASSERT(self
!= NULL
, return 0;);
1906 netif_stop_queue(dev
);
1908 /* Stop and remove instance of IrLAP */
1910 irlap_close(self
->irlap
);
1913 iobase
= self
->io
.fir_base
;
1915 disable_dma(self
->io
.dma
);
1917 /* Save current bank */
1918 bank
= inb(iobase
+BSR
);
1920 /* Disable interrupts */
1921 switch_bank(iobase
, BANK0
);
1922 outb(0, iobase
+IER
);
1924 free_irq(self
->io
.irq
, dev
);
1925 free_dma(self
->io
.dma
);
1927 /* Restore bank register */
1928 outb(bank
, iobase
+BSR
);
1936 * Function nsc_ircc_net_ioctl (dev, rq, cmd)
1938 * Process IOCTL commands for this device
1941 static int nsc_ircc_net_ioctl(struct net_device
*dev
, struct ifreq
*rq
, int cmd
)
1943 struct if_irda_req
*irq
= (struct if_irda_req
*) rq
;
1944 struct nsc_ircc_cb
*self
;
1945 unsigned long flags
;
1948 ASSERT(dev
!= NULL
, return -1;);
1952 ASSERT(self
!= NULL
, return -1;);
1954 IRDA_DEBUG(2, __FUNCTION__
"(), %s, (cmd=0x%X)\n", dev
->name
, cmd
);
1956 /* Disable interrupts & save flags */
1961 case SIOCSBANDWIDTH
: /* Set bandwidth */
1962 if (!capable(CAP_NET_ADMIN
))
1964 nsc_ircc_change_speed(self
, irq
->ifr_baudrate
);
1966 case SIOCSMEDIABUSY
: /* Set media busy */
1967 if (!capable(CAP_NET_ADMIN
))
1969 irda_device_set_media_busy(self
->netdev
, TRUE
);
1971 case SIOCGRECEIVING
: /* Check if we are receiving right now */
1972 irq
->ifr_receiving
= nsc_ircc_is_receiving(self
);
1978 restore_flags(flags
);
1983 static struct net_device_stats
*nsc_ircc_net_get_stats(struct net_device
*dev
)
1985 struct nsc_ircc_cb
*self
= (struct nsc_ircc_cb
*) dev
->priv
;
1987 return &self
->stats
;
1990 static void nsc_ircc_suspend(struct nsc_ircc_cb
*self
)
1992 MESSAGE("%s, Suspending\n", driver_name
);
1994 if (self
->io
.suspended
)
1997 nsc_ircc_net_close(self
->netdev
);
1999 self
->io
.suspended
= 1;
2002 static void nsc_ircc_wakeup(struct nsc_ircc_cb
*self
)
2006 if (!self
->io
.suspended
)
2009 iobase
= self
->io
.fir_base
;
2011 /* Switch to advanced mode */
2012 switch_bank(iobase
, BANK2
);
2013 outb(ECR1_EXT_SL
, iobase
+ECR1
);
2014 switch_bank(iobase
, BANK0
);
2016 nsc_ircc_net_open(self
->netdev
);
2018 MESSAGE("%s, Waking up\n", driver_name
);
2020 self
->io
.suspended
= 0;
2023 static int nsc_ircc_pmproc(struct pm_dev
*dev
, pm_request_t rqst
, void *data
)
2025 struct nsc_ircc_cb
*self
= (struct nsc_ircc_cb
*) dev
->data
;
2029 nsc_ircc_suspend(self
);
2032 nsc_ircc_wakeup(self
);
2040 MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
2041 MODULE_DESCRIPTION("NSC IrDA Device Driver");
2043 MODULE_PARM(qos_mtt_bits
, "i");
2044 MODULE_PARM_DESC(qos_mtt_bits
, "Minimum Turn Time");
2045 MODULE_PARM(io
, "1-4i");
2046 MODULE_PARM_DESC(io
, "Base I/O addresses");
2047 MODULE_PARM(irq
, "1-4i");
2048 MODULE_PARM_DESC(irq
, "IRQ lines");
2049 MODULE_PARM(dma
, "1-4i");
2050 MODULE_PARM_DESC(dma
, "DMA channels");
2051 MODULE_PARM(dongle_id
, "i");
2052 MODULE_PARM_DESC(dongle_id
, "Type-id of used dongle");
2054 int init_module(void)
2056 return nsc_ircc_init();
2059 void cleanup_module(void)