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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/********************************************************************
2 Filename: via-ircc.c
3 Version: 1.0
4 Description: Driver for the VIA VT8231/VT8233 IrDA chipsets
5 Author: VIA Technologies,inc
6 Date : 08/06/2003
7
8Copyright (c) 1998-2003 VIA Technologies, Inc.
9
10This program is free software; you can redistribute it and/or modify it under
11the terms of the GNU General Public License as published by the Free Software
12Foundation; either version 2, or (at your option) any later version.
13
14This program is distributed in the hope that it will be useful, but WITHOUT
15ANY WARRANTIES OR REPRESENTATIONS; without even the implied warranty of
16MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
17See the GNU General Public License for more details.
18
19You should have received a copy of the GNU General Public License along with
20this program; if not, write to the Free Software Foundation, Inc.,
2159 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22
23F01 Oct/02/02: Modify code for V0.11(move out back to back transfer)
24F02 Oct/28/02: Add SB device ID for 3147 and 3177.
25 Comment :
26 jul/09/2002 : only implement two kind of dongle currently.
27 Oct/02/2002 : work on VT8231 and VT8233 .
28 Aug/06/2003 : change driver format to pci driver .
29
302004-02-16: <sda@bdit.de>
31- Removed unneeded 'legacy' pci stuff.
32- Make sure SIR mode is set (hw_init()) before calling mode-dependant stuff.
33- On speed change from core, don't send SIR frame with new speed.
34 Use current speed and change speeds later.
35- Make module-param dongle_id actually work.
36- New dongle_id 17 (0x11): TDFS4500. Single-ended SIR only.
37 Tested with home-grown PCB on EPIA boards.
38- Code cleanup.
39
40 ********************************************************************/
41#include <linux/module.h>
42#include <linux/kernel.h>
43#include <linux/types.h>
44#include <linux/skbuff.h>
45#include <linux/netdevice.h>
46#include <linux/ioport.h>
47#include <linux/delay.h>
48#include <linux/slab.h>
49#include <linux/init.h>
50#include <linux/rtnetlink.h>
51#include <linux/pci.h>
52#include <linux/dma-mapping.h>
53
54#include <asm/io.h>
55#include <asm/dma.h>
56#include <asm/byteorder.h>
57
58#include <linux/pm.h>
59
60#include <net/irda/wrapper.h>
61#include <net/irda/irda.h>
62#include <net/irda/irda_device.h>
63
64#include "via-ircc.h"
65
66#define VIA_MODULE_NAME "via-ircc"
67#define CHIP_IO_EXTENT 0x40
68
69static char *driver_name = VIA_MODULE_NAME;
70
71/* Module parameters */
72static int qos_mtt_bits = 0x07; /* 1 ms or more */
73static int dongle_id = 0; /* default: probe */
74
75/* We can't guess the type of connected dongle, user *must* supply it. */
76module_param(dongle_id, int, 0);
77
78/* FIXME : we should not need this, because instances should be automatically
79 * managed by the PCI layer. Especially that we seem to only be using the
80 * first entry. Jean II */
81/* Max 4 instances for now */
82static struct via_ircc_cb *dev_self[] = { NULL, NULL, NULL, NULL };
83
84/* Some prototypes */
85static int via_ircc_open(int i, chipio_t * info, unsigned int id);
86static int via_ircc_close(struct via_ircc_cb *self);
87static int via_ircc_dma_receive(struct via_ircc_cb *self);
88static int via_ircc_dma_receive_complete(struct via_ircc_cb *self,
89 int iobase);
90static int via_ircc_hard_xmit_sir(struct sk_buff *skb,
91 struct net_device *dev);
92static int via_ircc_hard_xmit_fir(struct sk_buff *skb,
93 struct net_device *dev);
94static void via_hw_init(struct via_ircc_cb *self);
95static void via_ircc_change_speed(struct via_ircc_cb *self, __u32 baud);
David Howells7d12e782006-10-05 14:55:46 +010096static irqreturn_t via_ircc_interrupt(int irq, void *dev_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -070097static int via_ircc_is_receiving(struct via_ircc_cb *self);
98static int via_ircc_read_dongle_id(int iobase);
99
100static int via_ircc_net_open(struct net_device *dev);
101static int via_ircc_net_close(struct net_device *dev);
102static int via_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq,
103 int cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104static void via_ircc_change_dongle_speed(int iobase, int speed,
105 int dongle_id);
106static int RxTimerHandler(struct via_ircc_cb *self, int iobase);
107static void hwreset(struct via_ircc_cb *self);
108static int via_ircc_dma_xmit(struct via_ircc_cb *self, u16 iobase);
109static int upload_rxdata(struct via_ircc_cb *self, int iobase);
110static int __devinit via_init_one (struct pci_dev *pcidev, const struct pci_device_id *id);
111static void __devexit via_remove_one (struct pci_dev *pdev);
112
113/* FIXME : Should use udelay() instead, even if we are x86 only - Jean II */
114static void iodelay(int udelay)
115{
116 u8 data;
117 int i;
118
119 for (i = 0; i < udelay; i++) {
120 data = inb(0x80);
121 }
122}
123
124static struct pci_device_id via_pci_tbl[] = {
125 { PCI_VENDOR_ID_VIA, 0x8231, PCI_ANY_ID, PCI_ANY_ID,0,0,0 },
126 { PCI_VENDOR_ID_VIA, 0x3109, PCI_ANY_ID, PCI_ANY_ID,0,0,1 },
127 { PCI_VENDOR_ID_VIA, 0x3074, PCI_ANY_ID, PCI_ANY_ID,0,0,2 },
128 { PCI_VENDOR_ID_VIA, 0x3147, PCI_ANY_ID, PCI_ANY_ID,0,0,3 },
129 { PCI_VENDOR_ID_VIA, 0x3177, PCI_ANY_ID, PCI_ANY_ID,0,0,4 },
130 { 0, }
131};
132
133MODULE_DEVICE_TABLE(pci,via_pci_tbl);
134
135
136static struct pci_driver via_driver = {
137 .name = VIA_MODULE_NAME,
138 .id_table = via_pci_tbl,
139 .probe = via_init_one,
140 .remove = __devexit_p(via_remove_one),
141};
142
143
144/*
145 * Function via_ircc_init ()
146 *
147 * Initialize chip. Just find out chip type and resource.
148 */
149static int __init via_ircc_init(void)
150{
151 int rc;
152
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700153 IRDA_DEBUG(3, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154
155 rc = pci_register_driver(&via_driver);
156 if (rc < 0) {
157 IRDA_DEBUG(0, "%s(): error rc = %d, returning -ENODEV...\n",
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700158 __func__, rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 return -ENODEV;
160 }
161 return 0;
162}
163
164static int __devinit via_init_one (struct pci_dev *pcidev, const struct pci_device_id *id)
165{
166 int rc;
167 u8 temp,oldPCI_40,oldPCI_44,bTmp,bTmp1;
168 u16 Chipset,FirDRQ1,FirDRQ0,FirIRQ,FirIOBase;
169 chipio_t info;
170
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700171 IRDA_DEBUG(2, "%s(): Device ID=(0X%X)\n", __func__, id->device);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172
173 rc = pci_enable_device (pcidev);
174 if (rc) {
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700175 IRDA_DEBUG(0, "%s(): error rc = %d\n", __func__, rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 return -ENODEV;
177 }
178
179 // South Bridge exist
180 if ( ReadLPCReg(0x20) != 0x3C )
181 Chipset=0x3096;
182 else
183 Chipset=0x3076;
184
185 if (Chipset==0x3076) {
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700186 IRDA_DEBUG(2, "%s(): Chipset = 3076\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187
188 WriteLPCReg(7,0x0c );
189 temp=ReadLPCReg(0x30);//check if BIOS Enable Fir
190 if((temp&0x01)==1) { // BIOS close or no FIR
191 WriteLPCReg(0x1d, 0x82 );
192 WriteLPCReg(0x23,0x18);
193 temp=ReadLPCReg(0xF0);
194 if((temp&0x01)==0) {
195 temp=(ReadLPCReg(0x74)&0x03); //DMA
196 FirDRQ0=temp + 4;
197 temp=(ReadLPCReg(0x74)&0x0C) >> 2;
198 FirDRQ1=temp + 4;
199 } else {
200 temp=(ReadLPCReg(0x74)&0x0C) >> 2; //DMA
201 FirDRQ0=temp + 4;
202 FirDRQ1=FirDRQ0;
203 }
204 FirIRQ=(ReadLPCReg(0x70)&0x0f); //IRQ
205 FirIOBase=ReadLPCReg(0x60 ) << 8; //IO Space :high byte
206 FirIOBase=FirIOBase| ReadLPCReg(0x61) ; //low byte
207 FirIOBase=FirIOBase ;
208 info.fir_base=FirIOBase;
209 info.irq=FirIRQ;
210 info.dma=FirDRQ1;
211 info.dma2=FirDRQ0;
212 pci_read_config_byte(pcidev,0x40,&bTmp);
213 pci_write_config_byte(pcidev,0x40,((bTmp | 0x08) & 0xfe));
214 pci_read_config_byte(pcidev,0x42,&bTmp);
215 pci_write_config_byte(pcidev,0x42,(bTmp | 0xf0));
216 pci_write_config_byte(pcidev,0x5a,0xc0);
217 WriteLPCReg(0x28, 0x70 );
218 if (via_ircc_open(0, &info,0x3076) == 0)
219 rc=0;
220 } else
221 rc = -ENODEV; //IR not turn on
222 } else { //Not VT1211
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700223 IRDA_DEBUG(2, "%s(): Chipset = 3096\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224
225 pci_read_config_byte(pcidev,0x67,&bTmp);//check if BIOS Enable Fir
226 if((bTmp&0x01)==1) { // BIOS enable FIR
227 //Enable Double DMA clock
228 pci_read_config_byte(pcidev,0x42,&oldPCI_40);
229 pci_write_config_byte(pcidev,0x42,oldPCI_40 | 0x80);
230 pci_read_config_byte(pcidev,0x40,&oldPCI_40);
231 pci_write_config_byte(pcidev,0x40,oldPCI_40 & 0xf7);
232 pci_read_config_byte(pcidev,0x44,&oldPCI_44);
233 pci_write_config_byte(pcidev,0x44,0x4e);
234 //---------- read configuration from Function0 of south bridge
235 if((bTmp&0x02)==0) {
236 pci_read_config_byte(pcidev,0x44,&bTmp1); //DMA
237 FirDRQ0 = (bTmp1 & 0x30) >> 4;
238 pci_read_config_byte(pcidev,0x44,&bTmp1);
239 FirDRQ1 = (bTmp1 & 0xc0) >> 6;
240 } else {
241 pci_read_config_byte(pcidev,0x44,&bTmp1); //DMA
242 FirDRQ0 = (bTmp1 & 0x30) >> 4 ;
243 FirDRQ1=0;
244 }
245 pci_read_config_byte(pcidev,0x47,&bTmp1); //IRQ
246 FirIRQ = bTmp1 & 0x0f;
247
248 pci_read_config_byte(pcidev,0x69,&bTmp);
249 FirIOBase = bTmp << 8;//hight byte
250 pci_read_config_byte(pcidev,0x68,&bTmp);
251 FirIOBase = (FirIOBase | bTmp ) & 0xfff0;
252 //-------------------------
253 info.fir_base=FirIOBase;
254 info.irq=FirIRQ;
255 info.dma=FirDRQ1;
256 info.dma2=FirDRQ0;
257 if (via_ircc_open(0, &info,0x3096) == 0)
258 rc=0;
259 } else
260 rc = -ENODEV; //IR not turn on !!!!!
261 }//Not VT1211
262
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700263 IRDA_DEBUG(2, "%s(): End - rc = %d\n", __func__, rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 return rc;
265}
266
267/*
268 * Function via_ircc_clean ()
269 *
270 * Close all configured chips
271 *
272 */
273static void via_ircc_clean(void)
274{
275 int i;
276
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700277 IRDA_DEBUG(3, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278
Bjorn Helgaas9c3bd682006-08-15 00:05:38 -0700279 for (i=0; i < ARRAY_SIZE(dev_self); i++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 if (dev_self[i])
281 via_ircc_close(dev_self[i]);
282 }
283}
284
285static void __devexit via_remove_one (struct pci_dev *pdev)
286{
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700287 IRDA_DEBUG(3, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288
289 /* FIXME : This is ugly. We should use pci_get_drvdata(pdev);
290 * to get our driver instance and call directly via_ircc_close().
291 * See vlsi_ir for details...
292 * Jean II */
293 via_ircc_clean();
294
295 /* FIXME : This should be in via_ircc_close(), because here we may
296 * theoritically disable still configured devices :-( - Jean II */
297 pci_disable_device(pdev);
298}
299
300static void __exit via_ircc_cleanup(void)
301{
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700302 IRDA_DEBUG(3, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303
304 /* FIXME : This should be redundant, as pci_unregister_driver()
305 * should call via_remove_one() on each device.
306 * Jean II */
307 via_ircc_clean();
308
309 /* Cleanup all instances of the driver */
310 pci_unregister_driver (&via_driver);
311}
312
Stephen Hemminger0bd11f22009-03-20 19:35:43 +0000313static const struct net_device_ops via_ircc_sir_ops = {
314 .ndo_start_xmit = via_ircc_hard_xmit_sir,
315 .ndo_open = via_ircc_net_open,
316 .ndo_stop = via_ircc_net_close,
317 .ndo_do_ioctl = via_ircc_net_ioctl,
318};
319static const struct net_device_ops via_ircc_fir_ops = {
320 .ndo_start_xmit = via_ircc_hard_xmit_fir,
321 .ndo_open = via_ircc_net_open,
322 .ndo_stop = via_ircc_net_close,
323 .ndo_do_ioctl = via_ircc_net_ioctl,
324};
325
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326/*
327 * Function via_ircc_open (iobase, irq)
328 *
329 * Open driver instance
330 *
331 */
332static __devinit int via_ircc_open(int i, chipio_t * info, unsigned int id)
333{
334 struct net_device *dev;
335 struct via_ircc_cb *self;
336 int err;
337
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700338 IRDA_DEBUG(3, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339
Bjorn Helgaas9c3bd682006-08-15 00:05:38 -0700340 if (i >= ARRAY_SIZE(dev_self))
341 return -ENOMEM;
342
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343 /* Allocate new instance of the driver */
344 dev = alloc_irdadev(sizeof(struct via_ircc_cb));
345 if (dev == NULL)
346 return -ENOMEM;
347
Wang Chen4cf16532008-11-12 23:38:14 -0800348 self = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 self->netdev = dev;
350 spin_lock_init(&self->lock);
351
352 /* FIXME : We should store our driver instance in the PCI layer,
353 * using pci_set_drvdata(), not in this array.
354 * See vlsi_ir for details... - Jean II */
355 /* FIXME : 'i' is always 0 (see via_init_one()) :-( - Jean II */
356 /* Need to store self somewhere */
357 dev_self[i] = self;
358 self->index = i;
359 /* Initialize Resource */
360 self->io.cfg_base = info->cfg_base;
361 self->io.fir_base = info->fir_base;
362 self->io.irq = info->irq;
363 self->io.fir_ext = CHIP_IO_EXTENT;
364 self->io.dma = info->dma;
365 self->io.dma2 = info->dma2;
366 self->io.fifo_size = 32;
367 self->chip_id = id;
368 self->st_fifo.len = 0;
369 self->RxDataReady = 0;
370
371 /* Reserve the ioports that we need */
372 if (!request_region(self->io.fir_base, self->io.fir_ext, driver_name)) {
373 IRDA_DEBUG(0, "%s(), can't get iobase of 0x%03x\n",
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700374 __func__, self->io.fir_base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375 err = -ENODEV;
376 goto err_out1;
377 }
378
379 /* Initialize QoS for this device */
380 irda_init_max_qos_capabilies(&self->qos);
381
382 /* Check if user has supplied the dongle id or not */
383 if (!dongle_id)
384 dongle_id = via_ircc_read_dongle_id(self->io.fir_base);
385 self->io.dongle_id = dongle_id;
386
387 /* The only value we must override it the baudrate */
388 /* Maximum speeds and capabilities are dongle-dependant. */
389 switch( self->io.dongle_id ){
390 case 0x0d:
391 self->qos.baud_rate.bits =
392 IR_9600 | IR_19200 | IR_38400 | IR_57600 | IR_115200 |
393 IR_576000 | IR_1152000 | (IR_4000000 << 8);
394 break;
395 default:
396 self->qos.baud_rate.bits =
397 IR_9600 | IR_19200 | IR_38400 | IR_57600 | IR_115200;
398 break;
399 }
400
401 /* Following was used for testing:
402 *
403 * self->qos.baud_rate.bits = IR_9600;
404 *
405 * Is is no good, as it prohibits (error-prone) speed-changes.
406 */
407
408 self->qos.min_turn_time.bits = qos_mtt_bits;
409 irda_qos_bits_to_value(&self->qos);
410
411 /* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
412 self->rx_buff.truesize = 14384 + 2048;
413 self->tx_buff.truesize = 14384 + 2048;
414
415 /* Allocate memory if needed */
416 self->rx_buff.head =
417 dma_alloc_coherent(NULL, self->rx_buff.truesize,
418 &self->rx_buff_dma, GFP_KERNEL);
419 if (self->rx_buff.head == NULL) {
420 err = -ENOMEM;
421 goto err_out2;
422 }
423 memset(self->rx_buff.head, 0, self->rx_buff.truesize);
424
425 self->tx_buff.head =
426 dma_alloc_coherent(NULL, self->tx_buff.truesize,
427 &self->tx_buff_dma, GFP_KERNEL);
428 if (self->tx_buff.head == NULL) {
429 err = -ENOMEM;
430 goto err_out3;
431 }
432 memset(self->tx_buff.head, 0, self->tx_buff.truesize);
433
434 self->rx_buff.in_frame = FALSE;
435 self->rx_buff.state = OUTSIDE_FRAME;
436 self->tx_buff.data = self->tx_buff.head;
437 self->rx_buff.data = self->rx_buff.head;
438
439 /* Reset Tx queue info */
440 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
441 self->tx_fifo.tail = self->tx_buff.head;
442
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 /* Override the network functions we need to use */
Stephen Hemminger0bd11f22009-03-20 19:35:43 +0000444 dev->netdev_ops = &via_ircc_sir_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445
446 err = register_netdev(dev);
447 if (err)
448 goto err_out4;
449
450 IRDA_MESSAGE("IrDA: Registered device %s (via-ircc)\n", dev->name);
451
452 /* Initialise the hardware..
453 */
454 self->io.speed = 9600;
455 via_hw_init(self);
456 return 0;
457 err_out4:
458 dma_free_coherent(NULL, self->tx_buff.truesize,
459 self->tx_buff.head, self->tx_buff_dma);
460 err_out3:
461 dma_free_coherent(NULL, self->rx_buff.truesize,
462 self->rx_buff.head, self->rx_buff_dma);
463 err_out2:
464 release_region(self->io.fir_base, self->io.fir_ext);
465 err_out1:
466 free_netdev(dev);
467 dev_self[i] = NULL;
468 return err;
469}
470
471/*
472 * Function via_ircc_close (self)
473 *
474 * Close driver instance
475 *
476 */
477static int via_ircc_close(struct via_ircc_cb *self)
478{
479 int iobase;
480
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700481 IRDA_DEBUG(3, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482
483 IRDA_ASSERT(self != NULL, return -1;);
484
485 iobase = self->io.fir_base;
486
487 ResetChip(iobase, 5); //hardware reset.
488 /* Remove netdevice */
489 unregister_netdev(self->netdev);
490
491 /* Release the PORT that this driver is using */
492 IRDA_DEBUG(2, "%s(), Releasing Region %03x\n",
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700493 __func__, self->io.fir_base);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 release_region(self->io.fir_base, self->io.fir_ext);
495 if (self->tx_buff.head)
496 dma_free_coherent(NULL, self->tx_buff.truesize,
497 self->tx_buff.head, self->tx_buff_dma);
498 if (self->rx_buff.head)
499 dma_free_coherent(NULL, self->rx_buff.truesize,
500 self->rx_buff.head, self->rx_buff_dma);
501 dev_self[self->index] = NULL;
502
503 free_netdev(self->netdev);
504
505 return 0;
506}
507
508/*
509 * Function via_hw_init(self)
510 *
511 * Returns non-negative on success.
512 *
513 * Formerly via_ircc_setup
514 */
515static void via_hw_init(struct via_ircc_cb *self)
516{
517 int iobase = self->io.fir_base;
518
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700519 IRDA_DEBUG(3, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520
521 SetMaxRxPacketSize(iobase, 0x0fff); //set to max:4095
522 // FIFO Init
523 EnRXFIFOReadyInt(iobase, OFF);
524 EnRXFIFOHalfLevelInt(iobase, OFF);
525 EnTXFIFOHalfLevelInt(iobase, OFF);
526 EnTXFIFOUnderrunEOMInt(iobase, ON);
527 EnTXFIFOReadyInt(iobase, OFF);
528 InvertTX(iobase, OFF);
529 InvertRX(iobase, OFF);
530
531 if (ReadLPCReg(0x20) == 0x3c)
532 WriteLPCReg(0xF0, 0); // for VT1211
533 /* Int Init */
534 EnRXSpecInt(iobase, ON);
535
536 /* The following is basically hwreset */
537 /* If this is the case, why not just call hwreset() ? Jean II */
538 ResetChip(iobase, 5);
539 EnableDMA(iobase, OFF);
540 EnableTX(iobase, OFF);
541 EnableRX(iobase, OFF);
542 EnRXDMA(iobase, OFF);
543 EnTXDMA(iobase, OFF);
544 RXStart(iobase, OFF);
545 TXStart(iobase, OFF);
546 InitCard(iobase);
547 CommonInit(iobase);
548 SIRFilter(iobase, ON);
549 SetSIR(iobase, ON);
550 CRC16(iobase, ON);
551 EnTXCRC(iobase, 0);
552 WriteReg(iobase, I_ST_CT_0, 0x00);
553 SetBaudRate(iobase, 9600);
554 SetPulseWidth(iobase, 12);
555 SetSendPreambleCount(iobase, 0);
556
557 self->io.speed = 9600;
558 self->st_fifo.len = 0;
559
560 via_ircc_change_dongle_speed(iobase, self->io.speed,
561 self->io.dongle_id);
562
563 WriteReg(iobase, I_ST_CT_0, 0x80);
564}
565
566/*
567 * Function via_ircc_read_dongle_id (void)
568 *
569 */
570static int via_ircc_read_dongle_id(int iobase)
571{
572 int dongle_id = 9; /* Default to IBM */
573
574 IRDA_ERROR("via-ircc: dongle probing not supported, please specify dongle_id module parameter.\n");
575 return dongle_id;
576}
577
578/*
579 * Function via_ircc_change_dongle_speed (iobase, speed, dongle_id)
580 * Change speed of the attach dongle
581 * only implement two type of dongle currently.
582 */
583static void via_ircc_change_dongle_speed(int iobase, int speed,
584 int dongle_id)
585{
586 u8 mode = 0;
587
588 /* speed is unused, as we use IsSIROn()/IsMIROn() */
589 speed = speed;
590
591 IRDA_DEBUG(1, "%s(): change_dongle_speed to %d for 0x%x, %d\n",
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700592 __func__, speed, iobase, dongle_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593
594 switch (dongle_id) {
595
596 /* Note: The dongle_id's listed here are derived from
597 * nsc-ircc.c */
598
599 case 0x08: /* HP HSDL-2300, HP HSDL-3600/HSDL-3610 */
600 UseOneRX(iobase, ON); // use one RX pin RX1,RX2
601 InvertTX(iobase, OFF);
602 InvertRX(iobase, OFF);
603
604 EnRX2(iobase, ON); //sir to rx2
605 EnGPIOtoRX2(iobase, OFF);
606
607 if (IsSIROn(iobase)) { //sir
608 // Mode select Off
609 SlowIRRXLowActive(iobase, ON);
610 udelay(1000);
611 SlowIRRXLowActive(iobase, OFF);
612 } else {
613 if (IsMIROn(iobase)) { //mir
614 // Mode select On
615 SlowIRRXLowActive(iobase, OFF);
616 udelay(20);
617 } else { // fir
618 if (IsFIROn(iobase)) { //fir
619 // Mode select On
620 SlowIRRXLowActive(iobase, OFF);
621 udelay(20);
622 }
623 }
624 }
625 break;
626
627 case 0x09: /* IBM31T1100 or Temic TFDS6000/TFDS6500 */
628 UseOneRX(iobase, ON); //use ONE RX....RX1
629 InvertTX(iobase, OFF);
630 InvertRX(iobase, OFF); // invert RX pin
631
632 EnRX2(iobase, ON);
633 EnGPIOtoRX2(iobase, OFF);
634 if (IsSIROn(iobase)) { //sir
635 // Mode select On
636 SlowIRRXLowActive(iobase, ON);
637 udelay(20);
638 // Mode select Off
639 SlowIRRXLowActive(iobase, OFF);
640 }
641 if (IsMIROn(iobase)) { //mir
642 // Mode select On
643 SlowIRRXLowActive(iobase, OFF);
644 udelay(20);
645 // Mode select Off
646 SlowIRRXLowActive(iobase, ON);
647 } else { // fir
648 if (IsFIROn(iobase)) { //fir
649 // Mode select On
650 SlowIRRXLowActive(iobase, OFF);
651 // TX On
652 WriteTX(iobase, ON);
653 udelay(20);
654 // Mode select OFF
655 SlowIRRXLowActive(iobase, ON);
656 udelay(20);
657 // TX Off
658 WriteTX(iobase, OFF);
659 }
660 }
661 break;
662
663 case 0x0d:
664 UseOneRX(iobase, OFF); // use two RX pin RX1,RX2
665 InvertTX(iobase, OFF);
666 InvertRX(iobase, OFF);
667 SlowIRRXLowActive(iobase, OFF);
668 if (IsSIROn(iobase)) { //sir
669 EnGPIOtoRX2(iobase, OFF);
670 WriteGIO(iobase, OFF);
671 EnRX2(iobase, OFF); //sir to rx2
672 } else { // fir mir
673 EnGPIOtoRX2(iobase, OFF);
674 WriteGIO(iobase, OFF);
675 EnRX2(iobase, OFF); //fir to rx
676 }
677 break;
678
679 case 0x11: /* Temic TFDS4500 */
680
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700681 IRDA_DEBUG(2, "%s: Temic TFDS4500: One RX pin, TX normal, RX inverted.\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682
683 UseOneRX(iobase, ON); //use ONE RX....RX1
684 InvertTX(iobase, OFF);
685 InvertRX(iobase, ON); // invert RX pin
686
687 EnRX2(iobase, ON); //sir to rx2
688 EnGPIOtoRX2(iobase, OFF);
689
690 if( IsSIROn(iobase) ){ //sir
691
692 // Mode select On
693 SlowIRRXLowActive(iobase, ON);
694 udelay(20);
695 // Mode select Off
696 SlowIRRXLowActive(iobase, OFF);
697
698 } else{
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700699 IRDA_DEBUG(0, "%s: Warning: TFDS4500 not running in SIR mode !\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700 }
701 break;
702
703 case 0x0ff: /* Vishay */
704 if (IsSIROn(iobase))
705 mode = 0;
706 else if (IsMIROn(iobase))
707 mode = 1;
708 else if (IsFIROn(iobase))
709 mode = 2;
710 else if (IsVFIROn(iobase))
711 mode = 5; //VFIR-16
712 SI_SetMode(iobase, mode);
713 break;
714
715 default:
716 IRDA_ERROR("%s: Error: dongle_id %d unsupported !\n",
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700717 __func__, dongle_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718 }
719}
720
721/*
722 * Function via_ircc_change_speed (self, baud)
723 *
724 * Change the speed of the device
725 *
726 */
727static void via_ircc_change_speed(struct via_ircc_cb *self, __u32 speed)
728{
729 struct net_device *dev = self->netdev;
730 u16 iobase;
731 u8 value = 0, bTmp;
732
733 iobase = self->io.fir_base;
734 /* Update accounting for new speed */
735 self->io.speed = speed;
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700736 IRDA_DEBUG(1, "%s: change_speed to %d bps.\n", __func__, speed);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737
738 WriteReg(iobase, I_ST_CT_0, 0x0);
739
740 /* Controller mode sellection */
741 switch (speed) {
742 case 2400:
743 case 9600:
744 case 19200:
745 case 38400:
746 case 57600:
747 case 115200:
748 value = (115200/speed)-1;
749 SetSIR(iobase, ON);
750 CRC16(iobase, ON);
751 break;
752 case 576000:
753 /* FIXME: this can't be right, as it's the same as 115200,
754 * and 576000 is MIR, not SIR. */
755 value = 0;
756 SetSIR(iobase, ON);
757 CRC16(iobase, ON);
758 break;
759 case 1152000:
760 value = 0;
761 SetMIR(iobase, ON);
762 /* FIXME: CRC ??? */
763 break;
764 case 4000000:
765 value = 0;
766 SetFIR(iobase, ON);
767 SetPulseWidth(iobase, 0);
768 SetSendPreambleCount(iobase, 14);
769 CRC16(iobase, OFF);
770 EnTXCRC(iobase, ON);
771 break;
772 case 16000000:
773 value = 0;
774 SetVFIR(iobase, ON);
775 /* FIXME: CRC ??? */
776 break;
777 default:
778 value = 0;
779 break;
780 }
781
782 /* Set baudrate to 0x19[2..7] */
783 bTmp = (ReadReg(iobase, I_CF_H_1) & 0x03);
784 bTmp |= value << 2;
785 WriteReg(iobase, I_CF_H_1, bTmp);
786
787 /* Some dongles may need to be informed about speed changes. */
788 via_ircc_change_dongle_speed(iobase, speed, self->io.dongle_id);
789
790 /* Set FIFO size to 64 */
791 SetFIFO(iobase, 64);
792
793 /* Enable IR */
794 WriteReg(iobase, I_ST_CT_0, 0x80);
795
796 // EnTXFIFOHalfLevelInt(iobase,ON);
797
798 /* Enable some interrupts so we can receive frames */
799 //EnAllInt(iobase,ON);
800
801 if (IsSIROn(iobase)) {
802 SIRFilter(iobase, ON);
803 SIRRecvAny(iobase, ON);
804 } else {
805 SIRFilter(iobase, OFF);
806 SIRRecvAny(iobase, OFF);
807 }
808
809 if (speed > 115200) {
810 /* Install FIR xmit handler */
Stephen Hemminger0bd11f22009-03-20 19:35:43 +0000811 dev->netdev_ops = &via_ircc_fir_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812 via_ircc_dma_receive(self);
813 } else {
814 /* Install SIR xmit handler */
Stephen Hemminger0bd11f22009-03-20 19:35:43 +0000815 dev->netdev_ops = &via_ircc_sir_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816 }
817 netif_wake_queue(dev);
818}
819
820/*
821 * Function via_ircc_hard_xmit (skb, dev)
822 *
823 * Transmit the frame!
824 *
825 */
826static int via_ircc_hard_xmit_sir(struct sk_buff *skb,
827 struct net_device *dev)
828{
829 struct via_ircc_cb *self;
830 unsigned long flags;
831 u16 iobase;
832 __u32 speed;
833
Wang Chen4cf16532008-11-12 23:38:14 -0800834 self = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835 IRDA_ASSERT(self != NULL, return 0;);
836 iobase = self->io.fir_base;
837
838 netif_stop_queue(dev);
839 /* Check if we need to change the speed */
840 speed = irda_get_next_speed(skb);
841 if ((speed != self->io.speed) && (speed != -1)) {
842 /* Check for empty frame */
843 if (!skb->len) {
844 via_ircc_change_speed(self, speed);
845 dev->trans_start = jiffies;
846 dev_kfree_skb(skb);
847 return 0;
848 } else
849 self->new_speed = speed;
850 }
851 InitCard(iobase);
852 CommonInit(iobase);
853 SIRFilter(iobase, ON);
854 SetSIR(iobase, ON);
855 CRC16(iobase, ON);
856 EnTXCRC(iobase, 0);
857 WriteReg(iobase, I_ST_CT_0, 0x00);
858
859 spin_lock_irqsave(&self->lock, flags);
860 self->tx_buff.data = self->tx_buff.head;
861 self->tx_buff.len =
862 async_wrap_skb(skb, self->tx_buff.data,
863 self->tx_buff.truesize);
864
Stephen Hemmingeraf049082009-01-06 10:40:43 -0800865 dev->stats.tx_bytes += self->tx_buff.len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 /* Send this frame with old speed */
867 SetBaudRate(iobase, self->io.speed);
868 SetPulseWidth(iobase, 12);
869 SetSendPreambleCount(iobase, 0);
870 WriteReg(iobase, I_ST_CT_0, 0x80);
871
872 EnableTX(iobase, ON);
873 EnableRX(iobase, OFF);
874
875 ResetChip(iobase, 0);
876 ResetChip(iobase, 1);
877 ResetChip(iobase, 2);
878 ResetChip(iobase, 3);
879 ResetChip(iobase, 4);
880
881 EnAllInt(iobase, ON);
882 EnTXDMA(iobase, ON);
883 EnRXDMA(iobase, OFF);
884
885 irda_setup_dma(self->io.dma, self->tx_buff_dma, self->tx_buff.len,
886 DMA_TX_MODE);
887
888 SetSendByte(iobase, self->tx_buff.len);
889 RXStart(iobase, OFF);
890 TXStart(iobase, ON);
891
892 dev->trans_start = jiffies;
893 spin_unlock_irqrestore(&self->lock, flags);
894 dev_kfree_skb(skb);
895 return 0;
896}
897
898static int via_ircc_hard_xmit_fir(struct sk_buff *skb,
899 struct net_device *dev)
900{
901 struct via_ircc_cb *self;
902 u16 iobase;
903 __u32 speed;
904 unsigned long flags;
905
Wang Chen4cf16532008-11-12 23:38:14 -0800906 self = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907 iobase = self->io.fir_base;
908
909 if (self->st_fifo.len)
910 return 0;
911 if (self->chip_id == 0x3076)
912 iodelay(1500);
913 else
914 udelay(1500);
915 netif_stop_queue(dev);
916 speed = irda_get_next_speed(skb);
917 if ((speed != self->io.speed) && (speed != -1)) {
918 if (!skb->len) {
919 via_ircc_change_speed(self, speed);
920 dev->trans_start = jiffies;
921 dev_kfree_skb(skb);
922 return 0;
923 } else
924 self->new_speed = speed;
925 }
926 spin_lock_irqsave(&self->lock, flags);
927 self->tx_fifo.queue[self->tx_fifo.free].start = self->tx_fifo.tail;
928 self->tx_fifo.queue[self->tx_fifo.free].len = skb->len;
929
930 self->tx_fifo.tail += skb->len;
Stephen Hemmingeraf049082009-01-06 10:40:43 -0800931 dev->stats.tx_bytes += skb->len;
Arnaldo Carvalho de Melod626f622007-03-27 18:55:52 -0300932 skb_copy_from_linear_data(skb,
933 self->tx_fifo.queue[self->tx_fifo.free].start, skb->len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934 self->tx_fifo.len++;
935 self->tx_fifo.free++;
936//F01 if (self->tx_fifo.len == 1) {
937 via_ircc_dma_xmit(self, iobase);
938//F01 }
939//F01 if (self->tx_fifo.free < (MAX_TX_WINDOW -1 )) netif_wake_queue(self->netdev);
940 dev->trans_start = jiffies;
941 dev_kfree_skb(skb);
942 spin_unlock_irqrestore(&self->lock, flags);
943 return 0;
944
945}
946
947static int via_ircc_dma_xmit(struct via_ircc_cb *self, u16 iobase)
948{
949 EnTXDMA(iobase, OFF);
950 self->io.direction = IO_XMIT;
951 EnPhys(iobase, ON);
952 EnableTX(iobase, ON);
953 EnableRX(iobase, OFF);
954 ResetChip(iobase, 0);
955 ResetChip(iobase, 1);
956 ResetChip(iobase, 2);
957 ResetChip(iobase, 3);
958 ResetChip(iobase, 4);
959 EnAllInt(iobase, ON);
960 EnTXDMA(iobase, ON);
961 EnRXDMA(iobase, OFF);
962 irda_setup_dma(self->io.dma,
963 ((u8 *)self->tx_fifo.queue[self->tx_fifo.ptr].start -
964 self->tx_buff.head) + self->tx_buff_dma,
965 self->tx_fifo.queue[self->tx_fifo.ptr].len, DMA_TX_MODE);
966 IRDA_DEBUG(1, "%s: tx_fifo.ptr=%x,len=%x,tx_fifo.len=%x..\n",
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700967 __func__, self->tx_fifo.ptr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968 self->tx_fifo.queue[self->tx_fifo.ptr].len,
969 self->tx_fifo.len);
970
971 SetSendByte(iobase, self->tx_fifo.queue[self->tx_fifo.ptr].len);
972 RXStart(iobase, OFF);
973 TXStart(iobase, ON);
974 return 0;
975
976}
977
978/*
979 * Function via_ircc_dma_xmit_complete (self)
980 *
981 * The transfer of a frame in finished. This function will only be called
982 * by the interrupt handler
983 *
984 */
985static int via_ircc_dma_xmit_complete(struct via_ircc_cb *self)
986{
987 int iobase;
988 int ret = TRUE;
989 u8 Tx_status;
990
Harvey Harrisona97a6f12008-07-30 17:20:18 -0700991 IRDA_DEBUG(3, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992
993 iobase = self->io.fir_base;
994 /* Disable DMA */
995// DisableDmaChannel(self->io.dma);
996 /* Check for underrrun! */
997 /* Clear bit, by writing 1 into it */
998 Tx_status = GetTXStatus(iobase);
999 if (Tx_status & 0x08) {
Stephen Hemmingeraf049082009-01-06 10:40:43 -08001000 self->netdev->stats.tx_errors++;
1001 self->netdev->stats.tx_fifo_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001002 hwreset(self);
1003// how to clear underrrun ?
1004 } else {
Stephen Hemmingeraf049082009-01-06 10:40:43 -08001005 self->netdev->stats.tx_packets++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006 ResetChip(iobase, 3);
1007 ResetChip(iobase, 4);
1008 }
1009 /* Check if we need to change the speed */
1010 if (self->new_speed) {
1011 via_ircc_change_speed(self, self->new_speed);
1012 self->new_speed = 0;
1013 }
1014
1015 /* Finished with this frame, so prepare for next */
1016 if (IsFIROn(iobase)) {
1017 if (self->tx_fifo.len) {
1018 self->tx_fifo.len--;
1019 self->tx_fifo.ptr++;
1020 }
1021 }
1022 IRDA_DEBUG(1,
1023 "%s: tx_fifo.len=%x ,tx_fifo.ptr=%x,tx_fifo.free=%x...\n",
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001024 __func__,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025 self->tx_fifo.len, self->tx_fifo.ptr, self->tx_fifo.free);
1026/* F01_S
1027 // Any frames to be sent back-to-back?
1028 if (self->tx_fifo.len) {
1029 // Not finished yet!
1030 via_ircc_dma_xmit(self, iobase);
1031 ret = FALSE;
1032 } else {
1033F01_E*/
1034 // Reset Tx FIFO info
1035 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1036 self->tx_fifo.tail = self->tx_buff.head;
1037//F01 }
1038
1039 // Make sure we have room for more frames
1040//F01 if (self->tx_fifo.free < (MAX_TX_WINDOW -1 )) {
1041 // Not busy transmitting anymore
1042 // Tell the network layer, that we can accept more frames
1043 netif_wake_queue(self->netdev);
1044//F01 }
1045 return ret;
1046}
1047
1048/*
1049 * Function via_ircc_dma_receive (self)
1050 *
1051 * Set configuration for receive a frame.
1052 *
1053 */
1054static int via_ircc_dma_receive(struct via_ircc_cb *self)
1055{
1056 int iobase;
1057
1058 iobase = self->io.fir_base;
1059
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001060 IRDA_DEBUG(3, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061
1062 self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
1063 self->tx_fifo.tail = self->tx_buff.head;
1064 self->RxDataReady = 0;
1065 self->io.direction = IO_RECV;
1066 self->rx_buff.data = self->rx_buff.head;
1067 self->st_fifo.len = self->st_fifo.pending_bytes = 0;
1068 self->st_fifo.tail = self->st_fifo.head = 0;
1069
1070 EnPhys(iobase, ON);
1071 EnableTX(iobase, OFF);
1072 EnableRX(iobase, ON);
1073
1074 ResetChip(iobase, 0);
1075 ResetChip(iobase, 1);
1076 ResetChip(iobase, 2);
1077 ResetChip(iobase, 3);
1078 ResetChip(iobase, 4);
1079
1080 EnAllInt(iobase, ON);
1081 EnTXDMA(iobase, OFF);
1082 EnRXDMA(iobase, ON);
1083 irda_setup_dma(self->io.dma2, self->rx_buff_dma,
1084 self->rx_buff.truesize, DMA_RX_MODE);
1085 TXStart(iobase, OFF);
1086 RXStart(iobase, ON);
1087
1088 return 0;
1089}
1090
1091/*
1092 * Function via_ircc_dma_receive_complete (self)
1093 *
1094 * Controller Finished with receiving frames,
1095 * and this routine is call by ISR
1096 *
1097 */
1098static int via_ircc_dma_receive_complete(struct via_ircc_cb *self,
1099 int iobase)
1100{
1101 struct st_fifo *st_fifo;
1102 struct sk_buff *skb;
1103 int len, i;
1104 u8 status = 0;
1105
1106 iobase = self->io.fir_base;
1107 st_fifo = &self->st_fifo;
1108
1109 if (self->io.speed < 4000000) { //Speed below FIR
1110 len = GetRecvByte(iobase, self);
1111 skb = dev_alloc_skb(len + 1);
1112 if (skb == NULL)
1113 return FALSE;
1114 // Make sure IP header gets aligned
1115 skb_reserve(skb, 1);
1116 skb_put(skb, len - 2);
1117 if (self->chip_id == 0x3076) {
1118 for (i = 0; i < len - 2; i++)
1119 skb->data[i] = self->rx_buff.data[i * 2];
1120 } else {
1121 if (self->chip_id == 0x3096) {
1122 for (i = 0; i < len - 2; i++)
1123 skb->data[i] =
1124 self->rx_buff.data[i];
1125 }
1126 }
1127 // Move to next frame
1128 self->rx_buff.data += len;
Stephen Hemmingeraf049082009-01-06 10:40:43 -08001129 self->netdev->stats.rx_bytes += len;
1130 self->netdev->stats.rx_packets++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131 skb->dev = self->netdev;
Arnaldo Carvalho de Melo459a98e2007-03-19 15:30:44 -07001132 skb_reset_mac_header(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133 skb->protocol = htons(ETH_P_IRDA);
1134 netif_rx(skb);
1135 return TRUE;
1136 }
1137
1138 else { //FIR mode
1139 len = GetRecvByte(iobase, self);
1140 if (len == 0)
1141 return TRUE; //interrupt only, data maybe move by RxT
1142 if (((len - 4) < 2) || ((len - 4) > 2048)) {
1143 IRDA_DEBUG(1, "%s(): Trouble:len=%x,CurCount=%x,LastCount=%x..\n",
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001144 __func__, len, RxCurCount(iobase, self),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145 self->RxLastCount);
1146 hwreset(self);
1147 return FALSE;
1148 }
1149 IRDA_DEBUG(2, "%s(): fifo.len=%x,len=%x,CurCount=%x..\n",
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001150 __func__,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151 st_fifo->len, len - 4, RxCurCount(iobase, self));
1152
1153 st_fifo->entries[st_fifo->tail].status = status;
1154 st_fifo->entries[st_fifo->tail].len = len;
1155 st_fifo->pending_bytes += len;
1156 st_fifo->tail++;
1157 st_fifo->len++;
1158 if (st_fifo->tail > MAX_RX_WINDOW)
1159 st_fifo->tail = 0;
1160 self->RxDataReady = 0;
1161
1162 // It maybe have MAX_RX_WINDOW package receive by
1163 // receive_complete before Timer IRQ
1164/* F01_S
1165 if (st_fifo->len < (MAX_RX_WINDOW+2 )) {
1166 RXStart(iobase,ON);
1167 SetTimer(iobase,4);
1168 }
1169 else {
1170F01_E */
1171 EnableRX(iobase, OFF);
1172 EnRXDMA(iobase, OFF);
1173 RXStart(iobase, OFF);
1174//F01_S
1175 // Put this entry back in fifo
1176 if (st_fifo->head > MAX_RX_WINDOW)
1177 st_fifo->head = 0;
1178 status = st_fifo->entries[st_fifo->head].status;
1179 len = st_fifo->entries[st_fifo->head].len;
1180 st_fifo->head++;
1181 st_fifo->len--;
1182
1183 skb = dev_alloc_skb(len + 1 - 4);
1184 /*
1185 * if frame size,data ptr,or skb ptr are wrong ,the get next
1186 * entry.
1187 */
1188 if ((skb == NULL) || (skb->data == NULL)
1189 || (self->rx_buff.data == NULL) || (len < 6)) {
Stephen Hemmingeraf049082009-01-06 10:40:43 -08001190 self->netdev->stats.rx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001191 return TRUE;
1192 }
1193 skb_reserve(skb, 1);
1194 skb_put(skb, len - 4);
1195
Arnaldo Carvalho de Melo27d7ff42007-03-31 11:55:19 -03001196 skb_copy_to_linear_data(skb, self->rx_buff.data, len - 4);
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001197 IRDA_DEBUG(2, "%s(): len=%x.rx_buff=%p\n", __func__,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001198 len - 4, self->rx_buff.data);
1199
1200 // Move to next frame
1201 self->rx_buff.data += len;
Stephen Hemmingeraf049082009-01-06 10:40:43 -08001202 self->netdev->stats.rx_bytes += len;
1203 self->netdev->stats.rx_packets++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204 skb->dev = self->netdev;
Arnaldo Carvalho de Melo459a98e2007-03-19 15:30:44 -07001205 skb_reset_mac_header(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001206 skb->protocol = htons(ETH_P_IRDA);
1207 netif_rx(skb);
1208
1209//F01_E
1210 } //FIR
1211 return TRUE;
1212
1213}
1214
1215/*
1216 * if frame is received , but no INT ,then use this routine to upload frame.
1217 */
1218static int upload_rxdata(struct via_ircc_cb *self, int iobase)
1219{
1220 struct sk_buff *skb;
1221 int len;
1222 struct st_fifo *st_fifo;
1223 st_fifo = &self->st_fifo;
1224
1225 len = GetRecvByte(iobase, self);
1226
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001227 IRDA_DEBUG(2, "%s(): len=%x\n", __func__, len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001228
Chuck Short83e331e2006-09-25 22:31:03 -07001229 if ((len - 4) < 2) {
Stephen Hemmingeraf049082009-01-06 10:40:43 -08001230 self->netdev->stats.rx_dropped++;
Chuck Short83e331e2006-09-25 22:31:03 -07001231 return FALSE;
1232 }
1233
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234 skb = dev_alloc_skb(len + 1);
Chuck Short83e331e2006-09-25 22:31:03 -07001235 if (skb == NULL) {
Stephen Hemmingeraf049082009-01-06 10:40:43 -08001236 self->netdev->stats.rx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001237 return FALSE;
1238 }
1239 skb_reserve(skb, 1);
1240 skb_put(skb, len - 4 + 1);
Arnaldo Carvalho de Melo27d7ff42007-03-31 11:55:19 -03001241 skb_copy_to_linear_data(skb, self->rx_buff.data, len - 4 + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242 st_fifo->tail++;
1243 st_fifo->len++;
1244 if (st_fifo->tail > MAX_RX_WINDOW)
1245 st_fifo->tail = 0;
1246 // Move to next frame
1247 self->rx_buff.data += len;
Stephen Hemmingeraf049082009-01-06 10:40:43 -08001248 self->netdev->stats.rx_bytes += len;
1249 self->netdev->stats.rx_packets++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001250 skb->dev = self->netdev;
Arnaldo Carvalho de Melo459a98e2007-03-19 15:30:44 -07001251 skb_reset_mac_header(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252 skb->protocol = htons(ETH_P_IRDA);
1253 netif_rx(skb);
1254 if (st_fifo->len < (MAX_RX_WINDOW + 2)) {
1255 RXStart(iobase, ON);
1256 } else {
1257 EnableRX(iobase, OFF);
1258 EnRXDMA(iobase, OFF);
1259 RXStart(iobase, OFF);
1260 }
1261 return TRUE;
1262}
1263
1264/*
1265 * Implement back to back receive , use this routine to upload data.
1266 */
1267
1268static int RxTimerHandler(struct via_ircc_cb *self, int iobase)
1269{
1270 struct st_fifo *st_fifo;
1271 struct sk_buff *skb;
1272 int len;
1273 u8 status;
1274
1275 st_fifo = &self->st_fifo;
1276
1277 if (CkRxRecv(iobase, self)) {
1278 // if still receiving ,then return ,don't upload frame
1279 self->RetryCount = 0;
1280 SetTimer(iobase, 20);
1281 self->RxDataReady++;
1282 return FALSE;
1283 } else
1284 self->RetryCount++;
1285
1286 if ((self->RetryCount >= 1) ||
1287 ((st_fifo->pending_bytes + 2048) > self->rx_buff.truesize)
1288 || (st_fifo->len >= (MAX_RX_WINDOW))) {
1289 while (st_fifo->len > 0) { //upload frame
1290 // Put this entry back in fifo
1291 if (st_fifo->head > MAX_RX_WINDOW)
1292 st_fifo->head = 0;
1293 status = st_fifo->entries[st_fifo->head].status;
1294 len = st_fifo->entries[st_fifo->head].len;
1295 st_fifo->head++;
1296 st_fifo->len--;
1297
1298 skb = dev_alloc_skb(len + 1 - 4);
1299 /*
1300 * if frame size, data ptr, or skb ptr are wrong,
1301 * then get next entry.
1302 */
1303 if ((skb == NULL) || (skb->data == NULL)
1304 || (self->rx_buff.data == NULL) || (len < 6)) {
Stephen Hemmingeraf049082009-01-06 10:40:43 -08001305 self->netdev->stats.rx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306 continue;
1307 }
1308 skb_reserve(skb, 1);
1309 skb_put(skb, len - 4);
Arnaldo Carvalho de Melo27d7ff42007-03-31 11:55:19 -03001310 skb_copy_to_linear_data(skb, self->rx_buff.data, len - 4);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001312 IRDA_DEBUG(2, "%s(): len=%x.head=%x\n", __func__,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001313 len - 4, st_fifo->head);
1314
1315 // Move to next frame
1316 self->rx_buff.data += len;
Stephen Hemmingeraf049082009-01-06 10:40:43 -08001317 self->netdev->stats.rx_bytes += len;
1318 self->netdev->stats.rx_packets++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001319 skb->dev = self->netdev;
Arnaldo Carvalho de Melo459a98e2007-03-19 15:30:44 -07001320 skb_reset_mac_header(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001321 skb->protocol = htons(ETH_P_IRDA);
1322 netif_rx(skb);
1323 } //while
1324 self->RetryCount = 0;
1325
1326 IRDA_DEBUG(2,
1327 "%s(): End of upload HostStatus=%x,RxStatus=%x\n",
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001328 __func__,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329 GetHostStatus(iobase), GetRXStatus(iobase));
1330
1331 /*
1332 * if frame is receive complete at this routine ,then upload
1333 * frame.
1334 */
1335 if ((GetRXStatus(iobase) & 0x10)
1336 && (RxCurCount(iobase, self) != self->RxLastCount)) {
1337 upload_rxdata(self, iobase);
1338 if (irda_device_txqueue_empty(self->netdev))
1339 via_ircc_dma_receive(self);
1340 }
1341 } // timer detect complete
1342 else
1343 SetTimer(iobase, 4);
1344 return TRUE;
1345
1346}
1347
1348
1349
1350/*
David Howells7d12e782006-10-05 14:55:46 +01001351 * Function via_ircc_interrupt (irq, dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001352 *
1353 * An interrupt from the chip has arrived. Time to do some work
1354 *
1355 */
Jeff Garzik28fc1f52007-10-29 05:46:16 -04001356static irqreturn_t via_ircc_interrupt(int dummy, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001357{
Jeff Garzik28fc1f52007-10-29 05:46:16 -04001358 struct net_device *dev = dev_id;
Wang Chen4cf16532008-11-12 23:38:14 -08001359 struct via_ircc_cb *self = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001360 int iobase;
1361 u8 iHostIntType, iRxIntType, iTxIntType;
1362
Linus Torvalds1da177e2005-04-16 15:20:36 -07001363 iobase = self->io.fir_base;
1364 spin_lock(&self->lock);
1365 iHostIntType = GetHostStatus(iobase);
1366
1367 IRDA_DEBUG(4, "%s(): iHostIntType %02x: %s %s %s %02x\n",
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001368 __func__, iHostIntType,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369 (iHostIntType & 0x40) ? "Timer" : "",
1370 (iHostIntType & 0x20) ? "Tx" : "",
1371 (iHostIntType & 0x10) ? "Rx" : "",
1372 (iHostIntType & 0x0e) >> 1);
1373
1374 if ((iHostIntType & 0x40) != 0) { //Timer Event
1375 self->EventFlag.TimeOut++;
1376 ClearTimerInt(iobase, 1);
1377 if (self->io.direction == IO_XMIT) {
1378 via_ircc_dma_xmit(self, iobase);
1379 }
1380 if (self->io.direction == IO_RECV) {
1381 /*
1382 * frame ready hold too long, must reset.
1383 */
1384 if (self->RxDataReady > 30) {
1385 hwreset(self);
1386 if (irda_device_txqueue_empty(self->netdev)) {
1387 via_ircc_dma_receive(self);
1388 }
1389 } else { // call this to upload frame.
1390 RxTimerHandler(self, iobase);
1391 }
1392 } //RECV
1393 } //Timer Event
1394 if ((iHostIntType & 0x20) != 0) { //Tx Event
1395 iTxIntType = GetTXStatus(iobase);
1396
1397 IRDA_DEBUG(4, "%s(): iTxIntType %02x: %s %s %s %s\n",
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001398 __func__, iTxIntType,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001399 (iTxIntType & 0x08) ? "FIFO underr." : "",
1400 (iTxIntType & 0x04) ? "EOM" : "",
1401 (iTxIntType & 0x02) ? "FIFO ready" : "",
1402 (iTxIntType & 0x01) ? "Early EOM" : "");
1403
1404 if (iTxIntType & 0x4) {
1405 self->EventFlag.EOMessage++; // read and will auto clean
1406 if (via_ircc_dma_xmit_complete(self)) {
1407 if (irda_device_txqueue_empty
1408 (self->netdev)) {
1409 via_ircc_dma_receive(self);
1410 }
1411 } else {
1412 self->EventFlag.Unknown++;
1413 }
1414 } //EOP
1415 } //Tx Event
1416 //----------------------------------------
1417 if ((iHostIntType & 0x10) != 0) { //Rx Event
1418 /* Check if DMA has finished */
1419 iRxIntType = GetRXStatus(iobase);
1420
1421 IRDA_DEBUG(4, "%s(): iRxIntType %02x: %s %s %s %s %s %s %s\n",
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001422 __func__, iRxIntType,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001423 (iRxIntType & 0x80) ? "PHY err." : "",
1424 (iRxIntType & 0x40) ? "CRC err" : "",
1425 (iRxIntType & 0x20) ? "FIFO overr." : "",
1426 (iRxIntType & 0x10) ? "EOF" : "",
1427 (iRxIntType & 0x08) ? "RxData" : "",
1428 (iRxIntType & 0x02) ? "RxMaxLen" : "",
1429 (iRxIntType & 0x01) ? "SIR bad" : "");
1430 if (!iRxIntType)
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001431 IRDA_DEBUG(3, "%s(): RxIRQ =0\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001432
1433 if (iRxIntType & 0x10) {
1434 if (via_ircc_dma_receive_complete(self, iobase)) {
1435//F01 if(!(IsFIROn(iobase))) via_ircc_dma_receive(self);
1436 via_ircc_dma_receive(self);
1437 }
1438 } // No ERR
1439 else { //ERR
1440 IRDA_DEBUG(4, "%s(): RxIRQ ERR:iRxIntType=%x,HostIntType=%x,CurCount=%x,RxLastCount=%x_____\n",
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001441 __func__, iRxIntType, iHostIntType,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001442 RxCurCount(iobase, self),
1443 self->RxLastCount);
1444
1445 if (iRxIntType & 0x20) { //FIFO OverRun ERR
1446 ResetChip(iobase, 0);
1447 ResetChip(iobase, 1);
1448 } else { //PHY,CRC ERR
1449
1450 if (iRxIntType != 0x08)
1451 hwreset(self); //F01
1452 }
1453 via_ircc_dma_receive(self);
1454 } //ERR
1455
1456 } //Rx Event
1457 spin_unlock(&self->lock);
1458 return IRQ_RETVAL(iHostIntType);
1459}
1460
1461static void hwreset(struct via_ircc_cb *self)
1462{
1463 int iobase;
1464 iobase = self->io.fir_base;
1465
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001466 IRDA_DEBUG(3, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001467
1468 ResetChip(iobase, 5);
1469 EnableDMA(iobase, OFF);
1470 EnableTX(iobase, OFF);
1471 EnableRX(iobase, OFF);
1472 EnRXDMA(iobase, OFF);
1473 EnTXDMA(iobase, OFF);
1474 RXStart(iobase, OFF);
1475 TXStart(iobase, OFF);
1476 InitCard(iobase);
1477 CommonInit(iobase);
1478 SIRFilter(iobase, ON);
1479 SetSIR(iobase, ON);
1480 CRC16(iobase, ON);
1481 EnTXCRC(iobase, 0);
1482 WriteReg(iobase, I_ST_CT_0, 0x00);
1483 SetBaudRate(iobase, 9600);
1484 SetPulseWidth(iobase, 12);
1485 SetSendPreambleCount(iobase, 0);
1486 WriteReg(iobase, I_ST_CT_0, 0x80);
1487
1488 /* Restore speed. */
1489 via_ircc_change_speed(self, self->io.speed);
1490
1491 self->st_fifo.len = 0;
1492}
1493
1494/*
1495 * Function via_ircc_is_receiving (self)
1496 *
1497 * Return TRUE is we are currently receiving a frame
1498 *
1499 */
1500static int via_ircc_is_receiving(struct via_ircc_cb *self)
1501{
1502 int status = FALSE;
1503 int iobase;
1504
1505 IRDA_ASSERT(self != NULL, return FALSE;);
1506
1507 iobase = self->io.fir_base;
1508 if (CkRxRecv(iobase, self))
1509 status = TRUE;
1510
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001511 IRDA_DEBUG(2, "%s(): status=%x....\n", __func__, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001512
1513 return status;
1514}
1515
1516
1517/*
1518 * Function via_ircc_net_open (dev)
1519 *
1520 * Start the device
1521 *
1522 */
1523static int via_ircc_net_open(struct net_device *dev)
1524{
1525 struct via_ircc_cb *self;
1526 int iobase;
1527 char hwname[32];
1528
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001529 IRDA_DEBUG(3, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001530
1531 IRDA_ASSERT(dev != NULL, return -1;);
Wang Chen4cf16532008-11-12 23:38:14 -08001532 self = netdev_priv(dev);
Stephen Hemmingeraf049082009-01-06 10:40:43 -08001533 dev->stats.rx_packets = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001534 IRDA_ASSERT(self != NULL, return 0;);
1535 iobase = self->io.fir_base;
1536 if (request_irq(self->io.irq, via_ircc_interrupt, 0, dev->name, dev)) {
1537 IRDA_WARNING("%s, unable to allocate irq=%d\n", driver_name,
1538 self->io.irq);
1539 return -EAGAIN;
1540 }
1541 /*
1542 * Always allocate the DMA channel after the IRQ, and clean up on
1543 * failure.
1544 */
1545 if (request_dma(self->io.dma, dev->name)) {
1546 IRDA_WARNING("%s, unable to allocate dma=%d\n", driver_name,
1547 self->io.dma);
1548 free_irq(self->io.irq, self);
1549 return -EAGAIN;
1550 }
1551 if (self->io.dma2 != self->io.dma) {
1552 if (request_dma(self->io.dma2, dev->name)) {
1553 IRDA_WARNING("%s, unable to allocate dma2=%d\n",
1554 driver_name, self->io.dma2);
1555 free_irq(self->io.irq, self);
Wang Chen568b4932008-07-08 03:06:46 -07001556 free_dma(self->io.dma);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001557 return -EAGAIN;
1558 }
1559 }
1560
1561
1562 /* turn on interrupts */
1563 EnAllInt(iobase, ON);
1564 EnInternalLoop(iobase, OFF);
1565 EnExternalLoop(iobase, OFF);
1566
1567 /* */
1568 via_ircc_dma_receive(self);
1569
1570 /* Ready to play! */
1571 netif_start_queue(dev);
1572
1573 /*
1574 * Open new IrLAP layer instance, now that everything should be
1575 * initialized properly
1576 */
1577 sprintf(hwname, "VIA @ 0x%x", iobase);
1578 self->irlap = irlap_open(dev, &self->qos, hwname);
1579
1580 self->RxLastCount = 0;
1581
1582 return 0;
1583}
1584
1585/*
1586 * Function via_ircc_net_close (dev)
1587 *
1588 * Stop the device
1589 *
1590 */
1591static int via_ircc_net_close(struct net_device *dev)
1592{
1593 struct via_ircc_cb *self;
1594 int iobase;
1595
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001596 IRDA_DEBUG(3, "%s()\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001597
1598 IRDA_ASSERT(dev != NULL, return -1;);
Wang Chen4cf16532008-11-12 23:38:14 -08001599 self = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001600 IRDA_ASSERT(self != NULL, return 0;);
1601
1602 /* Stop device */
1603 netif_stop_queue(dev);
1604 /* Stop and remove instance of IrLAP */
1605 if (self->irlap)
1606 irlap_close(self->irlap);
1607 self->irlap = NULL;
1608 iobase = self->io.fir_base;
1609 EnTXDMA(iobase, OFF);
1610 EnRXDMA(iobase, OFF);
1611 DisableDmaChannel(self->io.dma);
1612
1613 /* Disable interrupts */
1614 EnAllInt(iobase, OFF);
1615 free_irq(self->io.irq, dev);
1616 free_dma(self->io.dma);
Wang Chen568b4932008-07-08 03:06:46 -07001617 if (self->io.dma2 != self->io.dma)
1618 free_dma(self->io.dma2);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001619
1620 return 0;
1621}
1622
1623/*
1624 * Function via_ircc_net_ioctl (dev, rq, cmd)
1625 *
1626 * Process IOCTL commands for this device
1627 *
1628 */
1629static int via_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq,
1630 int cmd)
1631{
1632 struct if_irda_req *irq = (struct if_irda_req *) rq;
1633 struct via_ircc_cb *self;
1634 unsigned long flags;
1635 int ret = 0;
1636
1637 IRDA_ASSERT(dev != NULL, return -1;);
Wang Chen4cf16532008-11-12 23:38:14 -08001638 self = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001639 IRDA_ASSERT(self != NULL, return -1;);
Harvey Harrisona97a6f12008-07-30 17:20:18 -07001640 IRDA_DEBUG(1, "%s(), %s, (cmd=0x%X)\n", __func__, dev->name,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001641 cmd);
1642 /* Disable interrupts & save flags */
1643 spin_lock_irqsave(&self->lock, flags);
1644 switch (cmd) {
1645 case SIOCSBANDWIDTH: /* Set bandwidth */
1646 if (!capable(CAP_NET_ADMIN)) {
1647 ret = -EPERM;
1648 goto out;
1649 }
1650 via_ircc_change_speed(self, irq->ifr_baudrate);
1651 break;
1652 case SIOCSMEDIABUSY: /* Set media busy */
1653 if (!capable(CAP_NET_ADMIN)) {
1654 ret = -EPERM;
1655 goto out;
1656 }
1657 irda_device_set_media_busy(self->netdev, TRUE);
1658 break;
1659 case SIOCGRECEIVING: /* Check if we are receiving right now */
1660 irq->ifr_receiving = via_ircc_is_receiving(self);
1661 break;
1662 default:
1663 ret = -EOPNOTSUPP;
1664 }
1665 out:
1666 spin_unlock_irqrestore(&self->lock, flags);
1667 return ret;
1668}
1669
Linus Torvalds1da177e2005-04-16 15:20:36 -07001670MODULE_AUTHOR("VIA Technologies,inc");
1671MODULE_DESCRIPTION("VIA IrDA Device Driver");
1672MODULE_LICENSE("GPL");
1673
1674module_init(via_ircc_init);
1675module_exit(via_ircc_cleanup);