1 /*********************************************************************
2 *
3 * vlsi_ir.c: VLSI82C147 PCI IrDA controller driver for Linux
4 *
5 * Copyright (c) 2001-2003 Martin Diehl
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
20 * MA 02111-1307 USA
21 *
22 ********************************************************************/
23
24 #include <linux/module.h>
25
26 #define DRIVER_NAME "vlsi_ir"
27 #define DRIVER_VERSION "v0.5"
28 #define DRIVER_DESCRIPTION "IrDA SIR/MIR/FIR driver for VLSI 82C147"
29 #define DRIVER_AUTHOR "Martin Diehl <info@mdiehl.de>"
30
31 MODULE_DESCRIPTION(DRIVER_DESCRIPTION);
32 MODULE_AUTHOR(DRIVER_AUTHOR);
33 MODULE_LICENSE("GPL");
34
35 /********************************************************/
36
37 #include <linux/kernel.h>
38 #include <linux/init.h>
39 #include <linux/interrupt.h>
40 #include <linux/pci.h>
41 #include <linux/slab.h>
42 #include <linux/netdevice.h>
43 #include <linux/skbuff.h>
44 #include <linux/delay.h>
45 #include <linux/time.h>
46 #include <linux/proc_fs.h>
47 #include <linux/seq_file.h>
48 #include <linux/mutex.h>
49 #include <asm/uaccess.h>
50 #include <asm/byteorder.h>
51
52 #include <net/irda/irda.h>
53 #include <net/irda/irda_device.h>
54 #include <net/irda/wrapper.h>
55 #include <net/irda/crc.h>
56
57 #include "vlsi_ir.h"
58
59 /********************************************************/
60
61 static /* const */ char drivername[] = DRIVER_NAME;
62
63 static DEFINE_PCI_DEVICE_TABLE(vlsi_irda_table) = {
64 {
65 .class = PCI_CLASS_WIRELESS_IRDA << 8,
66 .class_mask = PCI_CLASS_SUBCLASS_MASK << 8,
67 .vendor = PCI_VENDOR_ID_VLSI,
68 .device = PCI_DEVICE_ID_VLSI_82C147,
69 .subvendor = PCI_ANY_ID,
70 .subdevice = PCI_ANY_ID,
71 },
72 { /* all zeroes */ }
73 };
74
75 MODULE_DEVICE_TABLE(pci, vlsi_irda_table);
76
77 /********************************************************/
78
79 /* clksrc: which clock source to be used
80 * 0: auto - try PLL, fallback to 40MHz XCLK
81 * 1: on-chip 48MHz PLL
82 * 2: external 48MHz XCLK
83 * 3: external 40MHz XCLK (HP OB-800)
84 */
85
86 static int clksrc = 0; /* default is 0(auto) */
87 module_param(clksrc, int, 0);
88 MODULE_PARM_DESC(clksrc, "clock input source selection");
89
90 /* ringsize: size of the tx and rx descriptor rings
91 * independent for tx and rx
92 * specify as ringsize=tx[,rx]
93 * allowed values: 4, 8, 16, 32, 64
94 * Due to the IrDA 1.x max. allowed window size=7,
95 * there should be no gain when using rings larger than 8
96 */
97
98 static int ringsize[] = {8,8}; /* default is tx=8 / rx=8 */
99 module_param_array(ringsize, int, NULL, 0);
100 MODULE_PARM_DESC(ringsize, "TX, RX ring descriptor size");
101
102 /* sirpulse: tuning of the SIR pulse width within IrPHY 1.3 limits
103 * 0: very short, 1.5us (exception: 6us at 2.4 kbaud)
104 * 1: nominal 3/16 bittime width
105 * note: IrDA compliant peer devices should be happy regardless
106 * which one is used. Primary goal is to save some power
107 * on the sender's side - at 9.6kbaud for example the short
108 * pulse width saves more than 90% of the transmitted IR power.
109 */
110
111 static int sirpulse = 1; /* default is 3/16 bittime */
112 module_param(sirpulse, int, 0);
113 MODULE_PARM_DESC(sirpulse, "SIR pulse width tuning");
114
115 /* qos_mtt_bits: encoded min-turn-time value we require the peer device
116 * to use before transmitting to us. "Type 1" (per-station)
117 * bitfield according to IrLAP definition (section 6.6.8)
118 * Don't know which transceiver is used by my OB800 - the
119 * pretty common HP HDLS-1100 requires 1 msec - so lets use this.
120 */
121
122 static int qos_mtt_bits = 0x07; /* default is 1 ms or more */
123 module_param(qos_mtt_bits, int, 0);
124 MODULE_PARM_DESC(qos_mtt_bits, "IrLAP bitfield representing min-turn-time");
125
126 /********************************************************/
127
vlsi_reg_debug(unsigned iobase,const char * s)128 static void vlsi_reg_debug(unsigned iobase, const char *s)
129 {
130 int i;
131
132 printk(KERN_DEBUG "%s: ", s);
133 for (i = 0; i < 0x20; i++)
134 printk("%02x", (unsigned)inb((iobase+i)));
135 printk("\n");
136 }
137
vlsi_ring_debug(struct vlsi_ring * r)138 static void vlsi_ring_debug(struct vlsi_ring *r)
139 {
140 struct ring_descr *rd;
141 unsigned i;
142
143 printk(KERN_DEBUG "%s - ring %p / size %u / mask 0x%04x / len %u / dir %d / hw %p\n",
144 __func__, r, r->size, r->mask, r->len, r->dir, r->rd[0].hw);
145 printk(KERN_DEBUG "%s - head = %d / tail = %d\n", __func__,
146 atomic_read(&r->head) & r->mask, atomic_read(&r->tail) & r->mask);
147 for (i = 0; i < r->size; i++) {
148 rd = &r->rd[i];
149 printk(KERN_DEBUG "%s - ring descr %u: ", __func__, i);
150 printk("skb=%p data=%p hw=%p\n", rd->skb, rd->buf, rd->hw);
151 printk(KERN_DEBUG "%s - hw: status=%02x count=%u addr=0x%08x\n",
152 __func__, (unsigned) rd_get_status(rd),
153 (unsigned) rd_get_count(rd), (unsigned) rd_get_addr(rd));
154 }
155 }
156
157 /********************************************************/
158
159 /* needed regardless of CONFIG_PROC_FS */
160 static struct proc_dir_entry *vlsi_proc_root = NULL;
161
162 #ifdef CONFIG_PROC_FS
163
vlsi_proc_pdev(struct seq_file * seq,struct pci_dev * pdev)164 static void vlsi_proc_pdev(struct seq_file *seq, struct pci_dev *pdev)
165 {
166 unsigned iobase = pci_resource_start(pdev, 0);
167 unsigned i;
168
169 seq_printf(seq, "\n%s (vid/did: [%04x:%04x])\n",
170 pci_name(pdev), (int)pdev->vendor, (int)pdev->device);
171 seq_printf(seq, "pci-power-state: %u\n", (unsigned) pdev->current_state);
172 seq_printf(seq, "resources: irq=%u / io=0x%04x / dma_mask=0x%016Lx\n",
173 pdev->irq, (unsigned)pci_resource_start(pdev, 0), (unsigned long long)pdev->dma_mask);
174 seq_printf(seq, "hw registers: ");
175 for (i = 0; i < 0x20; i++)
176 seq_printf(seq, "%02x", (unsigned)inb((iobase+i)));
177 seq_printf(seq, "\n");
178 }
179
vlsi_proc_ndev(struct seq_file * seq,struct net_device * ndev)180 static void vlsi_proc_ndev(struct seq_file *seq, struct net_device *ndev)
181 {
182 vlsi_irda_dev_t *idev = netdev_priv(ndev);
183 u8 byte;
184 u16 word;
185 unsigned delta1, delta2;
186 struct timeval now;
187 unsigned iobase = ndev->base_addr;
188
189 seq_printf(seq, "\n%s link state: %s / %s / %s / %s\n", ndev->name,
190 netif_device_present(ndev) ? "attached" : "detached",
191 netif_running(ndev) ? "running" : "not running",
192 netif_carrier_ok(ndev) ? "carrier ok" : "no carrier",
193 netif_queue_stopped(ndev) ? "queue stopped" : "queue running");
194
195 if (!netif_running(ndev))
196 return;
197
198 seq_printf(seq, "\nhw-state:\n");
199 pci_read_config_byte(idev->pdev, VLSI_PCI_IRMISC, &byte);
200 seq_printf(seq, "IRMISC:%s%s%s uart%s",
201 (byte&IRMISC_IRRAIL) ? " irrail" : "",
202 (byte&IRMISC_IRPD) ? " irpd" : "",
203 (byte&IRMISC_UARTTST) ? " uarttest" : "",
204 (byte&IRMISC_UARTEN) ? "@" : " disabled\n");
205 if (byte&IRMISC_UARTEN) {
206 seq_printf(seq, "0x%s\n",
207 (byte&2) ? ((byte&1) ? "3e8" : "2e8")
208 : ((byte&1) ? "3f8" : "2f8"));
209 }
210 pci_read_config_byte(idev->pdev, VLSI_PCI_CLKCTL, &byte);
211 seq_printf(seq, "CLKCTL: PLL %s%s%s / clock %s / wakeup %s\n",
212 (byte&CLKCTL_PD_INV) ? "powered" : "down",
213 (byte&CLKCTL_LOCK) ? " locked" : "",
214 (byte&CLKCTL_EXTCLK) ? ((byte&CLKCTL_XCKSEL)?" / 40 MHz XCLK":" / 48 MHz XCLK") : "",
215 (byte&CLKCTL_CLKSTP) ? "stopped" : "running",
216 (byte&CLKCTL_WAKE) ? "enabled" : "disabled");
217 pci_read_config_byte(idev->pdev, VLSI_PCI_MSTRPAGE, &byte);
218 seq_printf(seq, "MSTRPAGE: 0x%02x\n", (unsigned)byte);
219
220 byte = inb(iobase+VLSI_PIO_IRINTR);
221 seq_printf(seq, "IRINTR:%s%s%s%s%s%s%s%s\n",
222 (byte&IRINTR_ACTEN) ? " ACTEN" : "",
223 (byte&IRINTR_RPKTEN) ? " RPKTEN" : "",
224 (byte&IRINTR_TPKTEN) ? " TPKTEN" : "",
225 (byte&IRINTR_OE_EN) ? " OE_EN" : "",
226 (byte&IRINTR_ACTIVITY) ? " ACTIVITY" : "",
227 (byte&IRINTR_RPKTINT) ? " RPKTINT" : "",
228 (byte&IRINTR_TPKTINT) ? " TPKTINT" : "",
229 (byte&IRINTR_OE_INT) ? " OE_INT" : "");
230 word = inw(iobase+VLSI_PIO_RINGPTR);
231 seq_printf(seq, "RINGPTR: rx=%u / tx=%u\n", RINGPTR_GET_RX(word), RINGPTR_GET_TX(word));
232 word = inw(iobase+VLSI_PIO_RINGBASE);
233 seq_printf(seq, "RINGBASE: busmap=0x%08x\n",
234 ((unsigned)word << 10)|(MSTRPAGE_VALUE<<24));
235 word = inw(iobase+VLSI_PIO_RINGSIZE);
236 seq_printf(seq, "RINGSIZE: rx=%u / tx=%u\n", RINGSIZE_TO_RXSIZE(word),
237 RINGSIZE_TO_TXSIZE(word));
238
239 word = inw(iobase+VLSI_PIO_IRCFG);
240 seq_printf(seq, "IRCFG:%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
241 (word&IRCFG_LOOP) ? " LOOP" : "",
242 (word&IRCFG_ENTX) ? " ENTX" : "",
243 (word&IRCFG_ENRX) ? " ENRX" : "",
244 (word&IRCFG_MSTR) ? " MSTR" : "",
245 (word&IRCFG_RXANY) ? " RXANY" : "",
246 (word&IRCFG_CRC16) ? " CRC16" : "",
247 (word&IRCFG_FIR) ? " FIR" : "",
248 (word&IRCFG_MIR) ? " MIR" : "",
249 (word&IRCFG_SIR) ? " SIR" : "",
250 (word&IRCFG_SIRFILT) ? " SIRFILT" : "",
251 (word&IRCFG_SIRTEST) ? " SIRTEST" : "",
252 (word&IRCFG_TXPOL) ? " TXPOL" : "",
253 (word&IRCFG_RXPOL) ? " RXPOL" : "");
254 word = inw(iobase+VLSI_PIO_IRENABLE);
255 seq_printf(seq, "IRENABLE:%s%s%s%s%s%s%s%s\n",
256 (word&IRENABLE_PHYANDCLOCK) ? " PHYANDCLOCK" : "",
257 (word&IRENABLE_CFGER) ? " CFGERR" : "",
258 (word&IRENABLE_FIR_ON) ? " FIR_ON" : "",
259 (word&IRENABLE_MIR_ON) ? " MIR_ON" : "",
260 (word&IRENABLE_SIR_ON) ? " SIR_ON" : "",
261 (word&IRENABLE_ENTXST) ? " ENTXST" : "",
262 (word&IRENABLE_ENRXST) ? " ENRXST" : "",
263 (word&IRENABLE_CRC16_ON) ? " CRC16_ON" : "");
264 word = inw(iobase+VLSI_PIO_PHYCTL);
265 seq_printf(seq, "PHYCTL: baud-divisor=%u / pulsewidth=%u / preamble=%u\n",
266 (unsigned)PHYCTL_TO_BAUD(word),
267 (unsigned)PHYCTL_TO_PLSWID(word),
268 (unsigned)PHYCTL_TO_PREAMB(word));
269 word = inw(iobase+VLSI_PIO_NPHYCTL);
270 seq_printf(seq, "NPHYCTL: baud-divisor=%u / pulsewidth=%u / preamble=%u\n",
271 (unsigned)PHYCTL_TO_BAUD(word),
272 (unsigned)PHYCTL_TO_PLSWID(word),
273 (unsigned)PHYCTL_TO_PREAMB(word));
274 word = inw(iobase+VLSI_PIO_MAXPKT);
275 seq_printf(seq, "MAXPKT: max. rx packet size = %u\n", word);
276 word = inw(iobase+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK;
277 seq_printf(seq, "RCVBCNT: rx-fifo filling level = %u\n", word);
278
279 seq_printf(seq, "\nsw-state:\n");
280 seq_printf(seq, "IrPHY setup: %d baud - %s encoding\n", idev->baud,
281 (idev->mode==IFF_SIR)?"SIR":((idev->mode==IFF_MIR)?"MIR":"FIR"));
282 do_gettimeofday(&now);
283 if (now.tv_usec >= idev->last_rx.tv_usec) {
284 delta2 = now.tv_usec - idev->last_rx.tv_usec;
285 delta1 = 0;
286 }
287 else {
288 delta2 = 1000000 + now.tv_usec - idev->last_rx.tv_usec;
289 delta1 = 1;
290 }
291 seq_printf(seq, "last rx: %lu.%06u sec\n",
292 now.tv_sec - idev->last_rx.tv_sec - delta1, delta2);
293
294 seq_printf(seq, "RX: packets=%lu / bytes=%lu / errors=%lu / dropped=%lu",
295 ndev->stats.rx_packets, ndev->stats.rx_bytes, ndev->stats.rx_errors,
296 ndev->stats.rx_dropped);
297 seq_printf(seq, " / overrun=%lu / length=%lu / frame=%lu / crc=%lu\n",
298 ndev->stats.rx_over_errors, ndev->stats.rx_length_errors,
299 ndev->stats.rx_frame_errors, ndev->stats.rx_crc_errors);
300 seq_printf(seq, "TX: packets=%lu / bytes=%lu / errors=%lu / dropped=%lu / fifo=%lu\n",
301 ndev->stats.tx_packets, ndev->stats.tx_bytes, ndev->stats.tx_errors,
302 ndev->stats.tx_dropped, ndev->stats.tx_fifo_errors);
303
304 }
305
vlsi_proc_ring(struct seq_file * seq,struct vlsi_ring * r)306 static void vlsi_proc_ring(struct seq_file *seq, struct vlsi_ring *r)
307 {
308 struct ring_descr *rd;
309 unsigned i, j;
310 int h, t;
311
312 seq_printf(seq, "size %u / mask 0x%04x / len %u / dir %d / hw %p\n",
313 r->size, r->mask, r->len, r->dir, r->rd[0].hw);
314 h = atomic_read(&r->head) & r->mask;
315 t = atomic_read(&r->tail) & r->mask;
316 seq_printf(seq, "head = %d / tail = %d ", h, t);
317 if (h == t)
318 seq_printf(seq, "(empty)\n");
319 else {
320 if (((t+1)&r->mask) == h)
321 seq_printf(seq, "(full)\n");
322 else
323 seq_printf(seq, "(level = %d)\n", ((unsigned)(t-h) & r->mask));
324 rd = &r->rd[h];
325 j = (unsigned) rd_get_count(rd);
326 seq_printf(seq, "current: rd = %d / status = %02x / len = %u\n",
327 h, (unsigned)rd_get_status(rd), j);
328 if (j > 0) {
329 seq_printf(seq, " data:");
330 if (j > 20)
331 j = 20;
332 for (i = 0; i < j; i++)
333 seq_printf(seq, " %02x", (unsigned)((unsigned char *)rd->buf)[i]);
334 seq_printf(seq, "\n");
335 }
336 }
337 for (i = 0; i < r->size; i++) {
338 rd = &r->rd[i];
339 seq_printf(seq, "> ring descr %u: ", i);
340 seq_printf(seq, "skb=%p data=%p hw=%p\n", rd->skb, rd->buf, rd->hw);
341 seq_printf(seq, " hw: status=%02x count=%u busaddr=0x%08x\n",
342 (unsigned) rd_get_status(rd),
343 (unsigned) rd_get_count(rd), (unsigned) rd_get_addr(rd));
344 }
345 }
346
vlsi_seq_show(struct seq_file * seq,void * v)347 static int vlsi_seq_show(struct seq_file *seq, void *v)
348 {
349 struct net_device *ndev = seq->private;
350 vlsi_irda_dev_t *idev = netdev_priv(ndev);
351 unsigned long flags;
352
353 seq_printf(seq, "\n%s %s\n\n", DRIVER_NAME, DRIVER_VERSION);
354 seq_printf(seq, "clksrc: %s\n",
355 (clksrc>=2) ? ((clksrc==3)?"40MHz XCLK":"48MHz XCLK")
356 : ((clksrc==1)?"48MHz PLL":"autodetect"));
357 seq_printf(seq, "ringsize: tx=%d / rx=%d\n",
358 ringsize[0], ringsize[1]);
359 seq_printf(seq, "sirpulse: %s\n", (sirpulse)?"3/16 bittime":"short");
360 seq_printf(seq, "qos_mtt_bits: 0x%02x\n", (unsigned)qos_mtt_bits);
361
362 spin_lock_irqsave(&idev->lock, flags);
363 if (idev->pdev != NULL) {
364 vlsi_proc_pdev(seq, idev->pdev);
365
366 if (idev->pdev->current_state == 0)
367 vlsi_proc_ndev(seq, ndev);
368 else
369 seq_printf(seq, "\nPCI controller down - resume_ok = %d\n",
370 idev->resume_ok);
371 if (netif_running(ndev) && idev->rx_ring && idev->tx_ring) {
372 seq_printf(seq, "\n--------- RX ring -----------\n\n");
373 vlsi_proc_ring(seq, idev->rx_ring);
374 seq_printf(seq, "\n--------- TX ring -----------\n\n");
375 vlsi_proc_ring(seq, idev->tx_ring);
376 }
377 }
378 seq_printf(seq, "\n");
379 spin_unlock_irqrestore(&idev->lock, flags);
380
381 return 0;
382 }
383
vlsi_seq_open(struct inode * inode,struct file * file)384 static int vlsi_seq_open(struct inode *inode, struct file *file)
385 {
386 return single_open(file, vlsi_seq_show, PDE(inode)->data);
387 }
388
389 static const struct file_operations vlsi_proc_fops = {
390 .owner = THIS_MODULE,
391 .open = vlsi_seq_open,
392 .read = seq_read,
393 .llseek = seq_lseek,
394 .release = single_release,
395 };
396
397 #define VLSI_PROC_FOPS (&vlsi_proc_fops)
398
399 #else /* CONFIG_PROC_FS */
400 #define VLSI_PROC_FOPS NULL
401 #endif
402
403 /********************************************************/
404
vlsi_alloc_ring(struct pci_dev * pdev,struct ring_descr_hw * hwmap,unsigned size,unsigned len,int dir)405 static struct vlsi_ring *vlsi_alloc_ring(struct pci_dev *pdev, struct ring_descr_hw *hwmap,
406 unsigned size, unsigned len, int dir)
407 {
408 struct vlsi_ring *r;
409 struct ring_descr *rd;
410 unsigned i, j;
411 dma_addr_t busaddr;
412
413 if (!size || ((size-1)&size)!=0) /* must be >0 and power of 2 */
414 return NULL;
415
416 r = kmalloc(sizeof(*r) + size * sizeof(struct ring_descr), GFP_KERNEL);
417 if (!r)
418 return NULL;
419 memset(r, 0, sizeof(*r));
420
421 r->pdev = pdev;
422 r->dir = dir;
423 r->len = len;
424 r->rd = (struct ring_descr *)(r+1);
425 r->mask = size - 1;
426 r->size = size;
427 atomic_set(&r->head, 0);
428 atomic_set(&r->tail, 0);
429
430 for (i = 0; i < size; i++) {
431 rd = r->rd + i;
432 memset(rd, 0, sizeof(*rd));
433 rd->hw = hwmap + i;
434 rd->buf = kmalloc(len, GFP_KERNEL|GFP_DMA);
435 if (rd->buf == NULL ||
436 !(busaddr = pci_map_single(pdev, rd->buf, len, dir))) {
437 if (rd->buf) {
438 IRDA_ERROR("%s: failed to create PCI-MAP for %p",
439 __func__, rd->buf);
440 kfree(rd->buf);
441 rd->buf = NULL;
442 }
443 for (j = 0; j < i; j++) {
444 rd = r->rd + j;
445 busaddr = rd_get_addr(rd);
446 rd_set_addr_status(rd, 0, 0);
447 if (busaddr)
448 pci_unmap_single(pdev, busaddr, len, dir);
449 kfree(rd->buf);
450 rd->buf = NULL;
451 }
452 kfree(r);
453 return NULL;
454 }
455 rd_set_addr_status(rd, busaddr, 0);
456 /* initially, the dma buffer is owned by the CPU */
457 rd->skb = NULL;
458 }
459 return r;
460 }
461
vlsi_free_ring(struct vlsi_ring * r)462 static int vlsi_free_ring(struct vlsi_ring *r)
463 {
464 struct ring_descr *rd;
465 unsigned i;
466 dma_addr_t busaddr;
467
468 for (i = 0; i < r->size; i++) {
469 rd = r->rd + i;
470 if (rd->skb)
471 dev_kfree_skb_any(rd->skb);
472 busaddr = rd_get_addr(rd);
473 rd_set_addr_status(rd, 0, 0);
474 if (busaddr)
475 pci_unmap_single(r->pdev, busaddr, r->len, r->dir);
476 kfree(rd->buf);
477 }
478 kfree(r);
479 return 0;
480 }
481
vlsi_create_hwif(vlsi_irda_dev_t * idev)482 static int vlsi_create_hwif(vlsi_irda_dev_t *idev)
483 {
484 char *ringarea;
485 struct ring_descr_hw *hwmap;
486
487 idev->virtaddr = NULL;
488 idev->busaddr = 0;
489
490 ringarea = pci_alloc_consistent(idev->pdev, HW_RING_AREA_SIZE, &idev->busaddr);
491 if (!ringarea) {
492 IRDA_ERROR("%s: insufficient memory for descriptor rings\n",
493 __func__);
494 goto out;
495 }
496 memset(ringarea, 0, HW_RING_AREA_SIZE);
497
498 hwmap = (struct ring_descr_hw *)ringarea;
499 idev->rx_ring = vlsi_alloc_ring(idev->pdev, hwmap, ringsize[1],
500 XFER_BUF_SIZE, PCI_DMA_FROMDEVICE);
501 if (idev->rx_ring == NULL)
502 goto out_unmap;
503
504 hwmap += MAX_RING_DESCR;
505 idev->tx_ring = vlsi_alloc_ring(idev->pdev, hwmap, ringsize[0],
506 XFER_BUF_SIZE, PCI_DMA_TODEVICE);
507 if (idev->tx_ring == NULL)
508 goto out_free_rx;
509
510 idev->virtaddr = ringarea;
511 return 0;
512
513 out_free_rx:
514 vlsi_free_ring(idev->rx_ring);
515 out_unmap:
516 idev->rx_ring = idev->tx_ring = NULL;
517 pci_free_consistent(idev->pdev, HW_RING_AREA_SIZE, ringarea, idev->busaddr);
518 idev->busaddr = 0;
519 out:
520 return -ENOMEM;
521 }
522
vlsi_destroy_hwif(vlsi_irda_dev_t * idev)523 static int vlsi_destroy_hwif(vlsi_irda_dev_t *idev)
524 {
525 vlsi_free_ring(idev->rx_ring);
526 vlsi_free_ring(idev->tx_ring);
527 idev->rx_ring = idev->tx_ring = NULL;
528
529 if (idev->busaddr)
530 pci_free_consistent(idev->pdev,HW_RING_AREA_SIZE,idev->virtaddr,idev->busaddr);
531
532 idev->virtaddr = NULL;
533 idev->busaddr = 0;
534
535 return 0;
536 }
537
538 /********************************************************/
539
vlsi_process_rx(struct vlsi_ring * r,struct ring_descr * rd)540 static int vlsi_process_rx(struct vlsi_ring *r, struct ring_descr *rd)
541 {
542 u16 status;
543 int crclen, len = 0;
544 struct sk_buff *skb;
545 int ret = 0;
546 struct net_device *ndev = (struct net_device *)pci_get_drvdata(r->pdev);
547 vlsi_irda_dev_t *idev = netdev_priv(ndev);
548
549 pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir);
550 /* dma buffer now owned by the CPU */
551 status = rd_get_status(rd);
552 if (status & RD_RX_ERROR) {
553 if (status & RD_RX_OVER)
554 ret |= VLSI_RX_OVER;
555 if (status & RD_RX_LENGTH)
556 ret |= VLSI_RX_LENGTH;
557 if (status & RD_RX_PHYERR)
558 ret |= VLSI_RX_FRAME;
559 if (status & RD_RX_CRCERR)
560 ret |= VLSI_RX_CRC;
561 goto done;
562 }
563
564 len = rd_get_count(rd);
565 crclen = (idev->mode==IFF_FIR) ? sizeof(u32) : sizeof(u16);
566 len -= crclen; /* remove trailing CRC */
567 if (len <= 0) {
568 IRDA_DEBUG(0, "%s: strange frame (len=%d)\n", __func__, len);
569 ret |= VLSI_RX_DROP;
570 goto done;
571 }
572
573 if (idev->mode == IFF_SIR) { /* hw checks CRC in MIR, FIR mode */
574
575 /* rd->buf is a streaming PCI_DMA_FROMDEVICE map. Doing the
576 * endian-adjustment there just in place will dirty a cache line
577 * which belongs to the map and thus we must be sure it will
578 * get flushed before giving the buffer back to hardware.
579 * vlsi_fill_rx() will do this anyway - but here we rely on.
580 */
581 le16_to_cpus(rd->buf+len);
582 if (irda_calc_crc16(INIT_FCS,rd->buf,len+crclen) != GOOD_FCS) {
583 IRDA_DEBUG(0, "%s: crc error\n", __func__);
584 ret |= VLSI_RX_CRC;
585 goto done;
586 }
587 }
588
589 if (!rd->skb) {
590 IRDA_WARNING("%s: rx packet lost\n", __func__);
591 ret |= VLSI_RX_DROP;
592 goto done;
593 }
594
595 skb = rd->skb;
596 rd->skb = NULL;
597 skb->dev = ndev;
598 memcpy(skb_put(skb,len), rd->buf, len);
599 skb_reset_mac_header(skb);
600 if (in_interrupt())
601 netif_rx(skb);
602 else
603 netif_rx_ni(skb);
604
605 done:
606 rd_set_status(rd, 0);
607 rd_set_count(rd, 0);
608 /* buffer still owned by CPU */
609
610 return (ret) ? -ret : len;
611 }
612
vlsi_fill_rx(struct vlsi_ring * r)613 static void vlsi_fill_rx(struct vlsi_ring *r)
614 {
615 struct ring_descr *rd;
616
617 for (rd = ring_last(r); rd != NULL; rd = ring_put(r)) {
618 if (rd_is_active(rd)) {
619 IRDA_WARNING("%s: driver bug: rx descr race with hw\n",
620 __func__);
621 vlsi_ring_debug(r);
622 break;
623 }
624 if (!rd->skb) {
625 rd->skb = dev_alloc_skb(IRLAP_SKB_ALLOCSIZE);
626 if (rd->skb) {
627 skb_reserve(rd->skb,1);
628 rd->skb->protocol = htons(ETH_P_IRDA);
629 }
630 else
631 break; /* probably not worth logging? */
632 }
633 /* give dma buffer back to busmaster */
634 pci_dma_sync_single_for_device(r->pdev, rd_get_addr(rd), r->len, r->dir);
635 rd_activate(rd);
636 }
637 }
638
vlsi_rx_interrupt(struct net_device * ndev)639 static void vlsi_rx_interrupt(struct net_device *ndev)
640 {
641 vlsi_irda_dev_t *idev = netdev_priv(ndev);
642 struct vlsi_ring *r = idev->rx_ring;
643 struct ring_descr *rd;
644 int ret;
645
646 for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) {
647
648 if (rd_is_active(rd))
649 break;
650
651 ret = vlsi_process_rx(r, rd);
652
653 if (ret < 0) {
654 ret = -ret;
655 ndev->stats.rx_errors++;
656 if (ret & VLSI_RX_DROP)
657 ndev->stats.rx_dropped++;
658 if (ret & VLSI_RX_OVER)
659 ndev->stats.rx_over_errors++;
660 if (ret & VLSI_RX_LENGTH)
661 ndev->stats.rx_length_errors++;
662 if (ret & VLSI_RX_FRAME)
663 ndev->stats.rx_frame_errors++;
664 if (ret & VLSI_RX_CRC)
665 ndev->stats.rx_crc_errors++;
666 }
667 else if (ret > 0) {
668 ndev->stats.rx_packets++;
669 ndev->stats.rx_bytes += ret;
670 }
671 }
672
673 do_gettimeofday(&idev->last_rx); /* remember "now" for later mtt delay */
674
675 vlsi_fill_rx(r);
676
677 if (ring_first(r) == NULL) {
678 /* we are in big trouble, if this should ever happen */
679 IRDA_ERROR("%s: rx ring exhausted!\n", __func__);
680 vlsi_ring_debug(r);
681 }
682 else
683 outw(0, ndev->base_addr+VLSI_PIO_PROMPT);
684 }
685
686 /* caller must have stopped the controller from busmastering */
687
vlsi_unarm_rx(vlsi_irda_dev_t * idev)688 static void vlsi_unarm_rx(vlsi_irda_dev_t *idev)
689 {
690 struct net_device *ndev = pci_get_drvdata(idev->pdev);
691 struct vlsi_ring *r = idev->rx_ring;
692 struct ring_descr *rd;
693 int ret;
694
695 for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) {
696
697 ret = 0;
698 if (rd_is_active(rd)) {
699 rd_set_status(rd, 0);
700 if (rd_get_count(rd)) {
701 IRDA_DEBUG(0, "%s - dropping rx packet\n", __func__);
702 ret = -VLSI_RX_DROP;
703 }
704 rd_set_count(rd, 0);
705 pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir);
706 if (rd->skb) {
707 dev_kfree_skb_any(rd->skb);
708 rd->skb = NULL;
709 }
710 }
711 else
712 ret = vlsi_process_rx(r, rd);
713
714 if (ret < 0) {
715 ret = -ret;
716 ndev->stats.rx_errors++;
717 if (ret & VLSI_RX_DROP)
718 ndev->stats.rx_dropped++;
719 if (ret & VLSI_RX_OVER)
720 ndev->stats.rx_over_errors++;
721 if (ret & VLSI_RX_LENGTH)
722 ndev->stats.rx_length_errors++;
723 if (ret & VLSI_RX_FRAME)
724 ndev->stats.rx_frame_errors++;
725 if (ret & VLSI_RX_CRC)
726 ndev->stats.rx_crc_errors++;
727 }
728 else if (ret > 0) {
729 ndev->stats.rx_packets++;
730 ndev->stats.rx_bytes += ret;
731 }
732 }
733 }
734
735 /********************************************************/
736
vlsi_process_tx(struct vlsi_ring * r,struct ring_descr * rd)737 static int vlsi_process_tx(struct vlsi_ring *r, struct ring_descr *rd)
738 {
739 u16 status;
740 int len;
741 int ret;
742
743 pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir);
744 /* dma buffer now owned by the CPU */
745 status = rd_get_status(rd);
746 if (status & RD_TX_UNDRN)
747 ret = VLSI_TX_FIFO;
748 else
749 ret = 0;
750 rd_set_status(rd, 0);
751
752 if (rd->skb) {
753 len = rd->skb->len;
754 dev_kfree_skb_any(rd->skb);
755 rd->skb = NULL;
756 }
757 else /* tx-skb already freed? - should never happen */
758 len = rd_get_count(rd); /* incorrect for SIR! (due to wrapping) */
759
760 rd_set_count(rd, 0);
761 /* dma buffer still owned by the CPU */
762
763 return (ret) ? -ret : len;
764 }
765
vlsi_set_baud(vlsi_irda_dev_t * idev,unsigned iobase)766 static int vlsi_set_baud(vlsi_irda_dev_t *idev, unsigned iobase)
767 {
768 u16 nphyctl;
769 u16 config;
770 unsigned mode;
771 int ret;
772 int baudrate;
773 int fifocnt;
774
775 baudrate = idev->new_baud;
776 IRDA_DEBUG(2, "%s: %d -> %d\n", __func__, idev->baud, idev->new_baud);
777 if (baudrate == 4000000) {
778 mode = IFF_FIR;
779 config = IRCFG_FIR;
780 nphyctl = PHYCTL_FIR;
781 }
782 else if (baudrate == 1152000) {
783 mode = IFF_MIR;
784 config = IRCFG_MIR | IRCFG_CRC16;
785 nphyctl = PHYCTL_MIR(clksrc==3);
786 }
787 else {
788 mode = IFF_SIR;
789 config = IRCFG_SIR | IRCFG_SIRFILT | IRCFG_RXANY;
790 switch(baudrate) {
791 default:
792 IRDA_WARNING("%s: undefined baudrate %d - fallback to 9600!\n",
793 __func__, baudrate);
794 baudrate = 9600;
795 /* fallthru */
796 case 2400:
797 case 9600:
798 case 19200:
799 case 38400:
800 case 57600:
801 case 115200:
802 nphyctl = PHYCTL_SIR(baudrate,sirpulse,clksrc==3);
803 break;
804 }
805 }
806 config |= IRCFG_MSTR | IRCFG_ENRX;
807
808 fifocnt = inw(iobase+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK;
809 if (fifocnt != 0) {
810 IRDA_DEBUG(0, "%s: rx fifo not empty(%d)\n", __func__, fifocnt);
811 }
812
813 outw(0, iobase+VLSI_PIO_IRENABLE);
814 outw(config, iobase+VLSI_PIO_IRCFG);
815 outw(nphyctl, iobase+VLSI_PIO_NPHYCTL);
816 wmb();
817 outw(IRENABLE_PHYANDCLOCK, iobase+VLSI_PIO_IRENABLE);
818 mb();
819
820 udelay(1); /* chip applies IRCFG on next rising edge of its 8MHz clock */
821
822 /* read back settings for validation */
823
824 config = inw(iobase+VLSI_PIO_IRENABLE) & IRENABLE_MASK;
825
826 if (mode == IFF_FIR)
827 config ^= IRENABLE_FIR_ON;
828 else if (mode == IFF_MIR)
829 config ^= (IRENABLE_MIR_ON|IRENABLE_CRC16_ON);
830 else
831 config ^= IRENABLE_SIR_ON;
832
833 if (config != (IRENABLE_PHYANDCLOCK|IRENABLE_ENRXST)) {
834 IRDA_WARNING("%s: failed to set %s mode!\n", __func__,
835 (mode==IFF_SIR)?"SIR":((mode==IFF_MIR)?"MIR":"FIR"));
836 ret = -1;
837 }
838 else {
839 if (inw(iobase+VLSI_PIO_PHYCTL) != nphyctl) {
840 IRDA_WARNING("%s: failed to apply baudrate %d\n",
841 __func__, baudrate);
842 ret = -1;
843 }
844 else {
845 idev->mode = mode;
846 idev->baud = baudrate;
847 idev->new_baud = 0;
848 ret = 0;
849 }
850 }
851
852 if (ret)
853 vlsi_reg_debug(iobase,__func__);
854
855 return ret;
856 }
857
vlsi_hard_start_xmit(struct sk_buff * skb,struct net_device * ndev)858 static netdev_tx_t vlsi_hard_start_xmit(struct sk_buff *skb,
859 struct net_device *ndev)
860 {
861 vlsi_irda_dev_t *idev = netdev_priv(ndev);
862 struct vlsi_ring *r = idev->tx_ring;
863 struct ring_descr *rd;
864 unsigned long flags;
865 unsigned iobase = ndev->base_addr;
866 u8 status;
867 u16 config;
868 int mtt;
869 int len, speed;
870 struct timeval now, ready;
871 char *msg = NULL;
872
873 speed = irda_get_next_speed(skb);
874 spin_lock_irqsave(&idev->lock, flags);
875 if (speed != -1 && speed != idev->baud) {
876 netif_stop_queue(ndev);
877 idev->new_baud = speed;
878 status = RD_TX_CLRENTX; /* stop tx-ring after this frame */
879 }
880 else
881 status = 0;
882
883 if (skb->len == 0) {
884 /* handle zero packets - should be speed change */
885 if (status == 0) {
886 msg = "bogus zero-length packet";
887 goto drop_unlock;
888 }
889
890 /* due to the completely asynch tx operation we might have
891 * IrLAP racing with the hardware here, f.e. if the controller
892 * is just sending the last packet with current speed while
893 * the LAP is already switching the speed using synchronous
894 * len=0 packet. Immediate execution would lead to hw lockup
895 * requiring a powercycle to reset. Good candidate to trigger
896 * this is the final UA:RSP packet after receiving a DISC:CMD
897 * when getting the LAP down.
898 * Note that we are not protected by the queue_stop approach
899 * because the final UA:RSP arrives _without_ request to apply
900 * new-speed-after-this-packet - hence the driver doesn't know
901 * this was the last packet and doesn't stop the queue. So the
902 * forced switch to default speed from LAP gets through as fast
903 * as only some 10 usec later while the UA:RSP is still processed
904 * by the hardware and we would get screwed.
905 */
906
907 if (ring_first(idev->tx_ring) == NULL) {
908 /* no race - tx-ring already empty */
909 vlsi_set_baud(idev, iobase);
910 netif_wake_queue(ndev);
911 }
912 else
913 ;
914 /* keep the speed change pending like it would
915 * for any len>0 packet. tx completion interrupt
916 * will apply it when the tx ring becomes empty.
917 */
918 spin_unlock_irqrestore(&idev->lock, flags);
919 dev_kfree_skb_any(skb);
920 return NETDEV_TX_OK;
921 }
922
923 /* sanity checks - simply drop the packet */
924
925 rd = ring_last(r);
926 if (!rd) {
927 msg = "ring full, but queue wasn't stopped";
928 goto drop_unlock;
929 }
930
931 if (rd_is_active(rd)) {
932 msg = "entry still owned by hw";
933 goto drop_unlock;
934 }
935
936 if (!rd->buf) {
937 msg = "tx ring entry without pci buffer";
938 goto drop_unlock;
939 }
940
941 if (rd->skb) {
942 msg = "ring entry with old skb still attached";
943 goto drop_unlock;
944 }
945
946 /* no need for serialization or interrupt disable during mtt */
947 spin_unlock_irqrestore(&idev->lock, flags);
948
949 if ((mtt = irda_get_mtt(skb)) > 0) {
950
951 ready.tv_usec = idev->last_rx.tv_usec + mtt;
952 ready.tv_sec = idev->last_rx.tv_sec;
953 if (ready.tv_usec >= 1000000) {
954 ready.tv_usec -= 1000000;
955 ready.tv_sec++; /* IrLAP 1.1: mtt always < 1 sec */
956 }
957 for(;;) {
958 do_gettimeofday(&now);
959 if (now.tv_sec > ready.tv_sec ||
960 (now.tv_sec==ready.tv_sec && now.tv_usec>=ready.tv_usec))
961 break;
962 udelay(100);
963 /* must not sleep here - called under netif_tx_lock! */
964 }
965 }
966
967 /* tx buffer already owned by CPU due to pci_dma_sync_single_for_cpu()
968 * after subsequent tx-completion
969 */
970
971 if (idev->mode == IFF_SIR) {
972 status |= RD_TX_DISCRC; /* no hw-crc creation */
973 len = async_wrap_skb(skb, rd->buf, r->len);
974
975 /* Some rare worst case situation in SIR mode might lead to
976 * potential buffer overflow. The wrapper detects this, returns
977 * with a shortened frame (without FCS/EOF) but doesn't provide
978 * any error indication about the invalid packet which we are
979 * going to transmit.
980 * Therefore we log if the buffer got filled to the point, where the
981 * wrapper would abort, i.e. when there are less than 5 bytes left to
982 * allow appending the FCS/EOF.
983 */
984
985 if (len >= r->len-5)
986 IRDA_WARNING("%s: possible buffer overflow with SIR wrapping!\n",
987 __func__);
988 }
989 else {
990 /* hw deals with MIR/FIR mode wrapping */
991 status |= RD_TX_PULSE; /* send 2 us highspeed indication pulse */
992 len = skb->len;
993 if (len > r->len) {
994 msg = "frame exceeds tx buffer length";
995 goto drop;
996 }
997 else
998 skb_copy_from_linear_data(skb, rd->buf, len);
999 }
1000
1001 rd->skb = skb; /* remember skb for tx-complete stats */
1002
1003 rd_set_count(rd, len);
1004 rd_set_status(rd, status); /* not yet active! */
1005
1006 /* give dma buffer back to busmaster-hw (flush caches to make
1007 * CPU-driven changes visible from the pci bus).
1008 */
1009
1010 pci_dma_sync_single_for_device(r->pdev, rd_get_addr(rd), r->len, r->dir);
1011
1012 /* Switching to TX mode here races with the controller
1013 * which may stop TX at any time when fetching an inactive descriptor
1014 * or one with CLR_ENTX set. So we switch on TX only, if TX was not running
1015 * _after_ the new descriptor was activated on the ring. This ensures
1016 * we will either find TX already stopped or we can be sure, there
1017 * will be a TX-complete interrupt even if the chip stopped doing
1018 * TX just after we found it still running. The ISR will then find
1019 * the non-empty ring and restart TX processing. The enclosing
1020 * spinlock provides the correct serialization to prevent race with isr.
1021 */
1022
1023 spin_lock_irqsave(&idev->lock,flags);
1024
1025 rd_activate(rd);
1026
1027 if (!(inw(iobase+VLSI_PIO_IRENABLE) & IRENABLE_ENTXST)) {
1028 int fifocnt;
1029
1030 fifocnt = inw(ndev->base_addr+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK;
1031 if (fifocnt != 0) {
1032 IRDA_DEBUG(0, "%s: rx fifo not empty(%d)\n", __func__, fifocnt);
1033 }
1034
1035 config = inw(iobase+VLSI_PIO_IRCFG);
1036 mb();
1037 outw(config | IRCFG_ENTX, iobase+VLSI_PIO_IRCFG);
1038 wmb();
1039 outw(0, iobase+VLSI_PIO_PROMPT);
1040 }
1041
1042 if (ring_put(r) == NULL) {
1043 netif_stop_queue(ndev);
1044 IRDA_DEBUG(3, "%s: tx ring full - queue stopped\n", __func__);
1045 }
1046 spin_unlock_irqrestore(&idev->lock, flags);
1047
1048 return NETDEV_TX_OK;
1049
1050 drop_unlock:
1051 spin_unlock_irqrestore(&idev->lock, flags);
1052 drop:
1053 IRDA_WARNING("%s: dropping packet - %s\n", __func__, msg);
1054 dev_kfree_skb_any(skb);
1055 ndev->stats.tx_errors++;
1056 ndev->stats.tx_dropped++;
1057 /* Don't even think about returning NET_XMIT_DROP (=1) here!
1058 * In fact any retval!=0 causes the packet scheduler to requeue the
1059 * packet for later retry of transmission - which isn't exactly
1060 * what we want after we've just called dev_kfree_skb_any ;-)
1061 */
1062 return NETDEV_TX_OK;
1063 }
1064
vlsi_tx_interrupt(struct net_device * ndev)1065 static void vlsi_tx_interrupt(struct net_device *ndev)
1066 {
1067 vlsi_irda_dev_t *idev = netdev_priv(ndev);
1068 struct vlsi_ring *r = idev->tx_ring;
1069 struct ring_descr *rd;
1070 unsigned iobase;
1071 int ret;
1072 u16 config;
1073
1074 for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) {
1075
1076 if (rd_is_active(rd))
1077 break;
1078
1079 ret = vlsi_process_tx(r, rd);
1080
1081 if (ret < 0) {
1082 ret = -ret;
1083 ndev->stats.tx_errors++;
1084 if (ret & VLSI_TX_DROP)
1085 ndev->stats.tx_dropped++;
1086 if (ret & VLSI_TX_FIFO)
1087 ndev->stats.tx_fifo_errors++;
1088 }
1089 else if (ret > 0){
1090 ndev->stats.tx_packets++;
1091 ndev->stats.tx_bytes += ret;
1092 }
1093 }
1094
1095 iobase = ndev->base_addr;
1096
1097 if (idev->new_baud && rd == NULL) /* tx ring empty and speed change pending */
1098 vlsi_set_baud(idev, iobase);
1099
1100 config = inw(iobase+VLSI_PIO_IRCFG);
1101 if (rd == NULL) /* tx ring empty: re-enable rx */
1102 outw((config & ~IRCFG_ENTX) | IRCFG_ENRX, iobase+VLSI_PIO_IRCFG);
1103
1104 else if (!(inw(iobase+VLSI_PIO_IRENABLE) & IRENABLE_ENTXST)) {
1105 int fifocnt;
1106
1107 fifocnt = inw(iobase+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK;
1108 if (fifocnt != 0) {
1109 IRDA_DEBUG(0, "%s: rx fifo not empty(%d)\n",
1110 __func__, fifocnt);
1111 }
1112 outw(config | IRCFG_ENTX, iobase+VLSI_PIO_IRCFG);
1113 }
1114
1115 outw(0, iobase+VLSI_PIO_PROMPT);
1116
1117 if (netif_queue_stopped(ndev) && !idev->new_baud) {
1118 netif_wake_queue(ndev);
1119 IRDA_DEBUG(3, "%s: queue awoken\n", __func__);
1120 }
1121 }
1122
1123 /* caller must have stopped the controller from busmastering */
1124
vlsi_unarm_tx(vlsi_irda_dev_t * idev)1125 static void vlsi_unarm_tx(vlsi_irda_dev_t *idev)
1126 {
1127 struct net_device *ndev = pci_get_drvdata(idev->pdev);
1128 struct vlsi_ring *r = idev->tx_ring;
1129 struct ring_descr *rd;
1130 int ret;
1131
1132 for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) {
1133
1134 ret = 0;
1135 if (rd_is_active(rd)) {
1136 rd_set_status(rd, 0);
1137 rd_set_count(rd, 0);
1138 pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir);
1139 if (rd->skb) {
1140 dev_kfree_skb_any(rd->skb);
1141 rd->skb = NULL;
1142 }
1143 IRDA_DEBUG(0, "%s - dropping tx packet\n", __func__);
1144 ret = -VLSI_TX_DROP;
1145 }
1146 else
1147 ret = vlsi_process_tx(r, rd);
1148
1149 if (ret < 0) {
1150 ret = -ret;
1151 ndev->stats.tx_errors++;
1152 if (ret & VLSI_TX_DROP)
1153 ndev->stats.tx_dropped++;
1154 if (ret & VLSI_TX_FIFO)
1155 ndev->stats.tx_fifo_errors++;
1156 }
1157 else if (ret > 0){
1158 ndev->stats.tx_packets++;
1159 ndev->stats.tx_bytes += ret;
1160 }
1161 }
1162
1163 }
1164
1165 /********************************************************/
1166
vlsi_start_clock(struct pci_dev * pdev)1167 static int vlsi_start_clock(struct pci_dev *pdev)
1168 {
1169 u8 clkctl, lock;
1170 int i, count;
1171
1172 if (clksrc < 2) { /* auto or PLL: try PLL */
1173 clkctl = CLKCTL_PD_INV | CLKCTL_CLKSTP;
1174 pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl);
1175
1176 /* procedure to detect PLL lock synchronisation:
1177 * after 0.5 msec initial delay we expect to find 3 PLL lock
1178 * indications within 10 msec for successful PLL detection.
1179 */
1180 udelay(500);
1181 count = 0;
1182 for (i = 500; i <= 10000; i += 50) { /* max 10 msec */
1183 pci_read_config_byte(pdev, VLSI_PCI_CLKCTL, &lock);
1184 if (lock&CLKCTL_LOCK) {
1185 if (++count >= 3)
1186 break;
1187 }
1188 udelay(50);
1189 }
1190 if (count < 3) {
1191 if (clksrc == 1) { /* explicitly asked for PLL hence bail out */
1192 IRDA_ERROR("%s: no PLL or failed to lock!\n",
1193 __func__);
1194 clkctl = CLKCTL_CLKSTP;
1195 pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl);
1196 return -1;
1197 }
1198 else /* was: clksrc=0(auto) */
1199 clksrc = 3; /* fallback to 40MHz XCLK (OB800) */
1200
1201 IRDA_DEBUG(0, "%s: PLL not locked, fallback to clksrc=%d\n",
1202 __func__, clksrc);
1203 }
1204 else
1205 clksrc = 1; /* got successful PLL lock */
1206 }
1207
1208 if (clksrc != 1) {
1209 /* we get here if either no PLL detected in auto-mode or
1210 an external clock source was explicitly specified */
1211
1212 clkctl = CLKCTL_EXTCLK | CLKCTL_CLKSTP;
1213 if (clksrc == 3)
1214 clkctl |= CLKCTL_XCKSEL;
1215 pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl);
1216
1217 /* no way to test for working XCLK */
1218 }
1219 else
1220 pci_read_config_byte(pdev, VLSI_PCI_CLKCTL, &clkctl);
1221
1222 /* ok, now going to connect the chip with the clock source */
1223
1224 clkctl &= ~CLKCTL_CLKSTP;
1225 pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl);
1226
1227 return 0;
1228 }
1229
vlsi_stop_clock(struct pci_dev * pdev)1230 static void vlsi_stop_clock(struct pci_dev *pdev)
1231 {
1232 u8 clkctl;
1233
1234 /* disconnect chip from clock source */
1235 pci_read_config_byte(pdev, VLSI_PCI_CLKCTL, &clkctl);
1236 clkctl |= CLKCTL_CLKSTP;
1237 pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl);
1238
1239 /* disable all clock sources */
1240 clkctl &= ~(CLKCTL_EXTCLK | CLKCTL_PD_INV);
1241 pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl);
1242 }
1243
1244 /********************************************************/
1245
1246 /* writing all-zero to the VLSI PCI IO register area seems to prevent
1247 * some occasional situations where the hardware fails (symptoms are
1248 * what appears as stalled tx/rx state machines, i.e. everything ok for
1249 * receive or transmit but hw makes no progress or is unable to access
1250 * the bus memory locations).
1251 * Best place to call this is immediately after/before the internal clock
1252 * gets started/stopped.
1253 */
1254
vlsi_clear_regs(unsigned iobase)1255 static inline void vlsi_clear_regs(unsigned iobase)
1256 {
1257 unsigned i;
1258 const unsigned chip_io_extent = 32;
1259
1260 for (i = 0; i < chip_io_extent; i += sizeof(u16))
1261 outw(0, iobase + i);
1262 }
1263
vlsi_init_chip(struct pci_dev * pdev)1264 static int vlsi_init_chip(struct pci_dev *pdev)
1265 {
1266 struct net_device *ndev = pci_get_drvdata(pdev);
1267 vlsi_irda_dev_t *idev = netdev_priv(ndev);
1268 unsigned iobase;
1269 u16 ptr;
1270
1271 /* start the clock and clean the registers */
1272
1273 if (vlsi_start_clock(pdev)) {
1274 IRDA_ERROR("%s: no valid clock source\n", __func__);
1275 return -1;
1276 }
1277 iobase = ndev->base_addr;
1278 vlsi_clear_regs(iobase);
1279
1280 outb(IRINTR_INT_MASK, iobase+VLSI_PIO_IRINTR); /* w/c pending IRQ, disable all INT */
1281
1282 outw(0, iobase+VLSI_PIO_IRENABLE); /* disable IrPHY-interface */
1283
1284 /* disable everything, particularly IRCFG_MSTR - (also resetting the RING_PTR) */
1285
1286 outw(0, iobase+VLSI_PIO_IRCFG);
1287 wmb();
1288
1289 outw(MAX_PACKET_LENGTH, iobase+VLSI_PIO_MAXPKT); /* max possible value=0x0fff */
1290
1291 outw(BUS_TO_RINGBASE(idev->busaddr), iobase+VLSI_PIO_RINGBASE);
1292
1293 outw(TX_RX_TO_RINGSIZE(idev->tx_ring->size, idev->rx_ring->size),
1294 iobase+VLSI_PIO_RINGSIZE);
1295
1296 ptr = inw(iobase+VLSI_PIO_RINGPTR);
1297 atomic_set(&idev->rx_ring->head, RINGPTR_GET_RX(ptr));
1298 atomic_set(&idev->rx_ring->tail, RINGPTR_GET_RX(ptr));
1299 atomic_set(&idev->tx_ring->head, RINGPTR_GET_TX(ptr));
1300 atomic_set(&idev->tx_ring->tail, RINGPTR_GET_TX(ptr));
1301
1302 vlsi_set_baud(idev, iobase); /* idev->new_baud used as provided by caller */
1303
1304 outb(IRINTR_INT_MASK, iobase+VLSI_PIO_IRINTR); /* just in case - w/c pending IRQ's */
1305 wmb();
1306
1307 /* DO NOT BLINDLY ENABLE IRINTR_ACTEN!
1308 * basically every received pulse fires an ACTIVITY-INT
1309 * leading to >>1000 INT's per second instead of few 10
1310 */
1311
1312 outb(IRINTR_RPKTEN|IRINTR_TPKTEN, iobase+VLSI_PIO_IRINTR);
1313
1314 return 0;
1315 }
1316
vlsi_start_hw(vlsi_irda_dev_t * idev)1317 static int vlsi_start_hw(vlsi_irda_dev_t *idev)
1318 {
1319 struct pci_dev *pdev = idev->pdev;
1320 struct net_device *ndev = pci_get_drvdata(pdev);
1321 unsigned iobase = ndev->base_addr;
1322 u8 byte;
1323
1324 /* we don't use the legacy UART, disable its address decoding */
1325
1326 pci_read_config_byte(pdev, VLSI_PCI_IRMISC, &byte);
1327 byte &= ~(IRMISC_UARTEN | IRMISC_UARTTST);
1328 pci_write_config_byte(pdev, VLSI_PCI_IRMISC, byte);
1329
1330 /* enable PCI busmaster access to our 16MB page */
1331
1332 pci_write_config_byte(pdev, VLSI_PCI_MSTRPAGE, MSTRPAGE_VALUE);
1333 pci_set_master(pdev);
1334
1335 if (vlsi_init_chip(pdev) < 0) {
1336 pci_disable_device(pdev);
1337 return -1;
1338 }
1339
1340 vlsi_fill_rx(idev->rx_ring);
1341
1342 do_gettimeofday(&idev->last_rx); /* first mtt may start from now on */
1343
1344 outw(0, iobase+VLSI_PIO_PROMPT); /* kick hw state machine */
1345
1346 return 0;
1347 }
1348
vlsi_stop_hw(vlsi_irda_dev_t * idev)1349 static int vlsi_stop_hw(vlsi_irda_dev_t *idev)
1350 {
1351 struct pci_dev *pdev = idev->pdev;
1352 struct net_device *ndev = pci_get_drvdata(pdev);
1353 unsigned iobase = ndev->base_addr;
1354 unsigned long flags;
1355
1356 spin_lock_irqsave(&idev->lock,flags);
1357 outw(0, iobase+VLSI_PIO_IRENABLE);
1358 outw(0, iobase+VLSI_PIO_IRCFG); /* disable everything */
1359
1360 /* disable and w/c irqs */
1361 outb(0, iobase+VLSI_PIO_IRINTR);
1362 wmb();
1363 outb(IRINTR_INT_MASK, iobase+VLSI_PIO_IRINTR);
1364 spin_unlock_irqrestore(&idev->lock,flags);
1365
1366 vlsi_unarm_tx(idev);
1367 vlsi_unarm_rx(idev);
1368
1369 vlsi_clear_regs(iobase);
1370 vlsi_stop_clock(pdev);
1371
1372 pci_disable_device(pdev);
1373
1374 return 0;
1375 }
1376
1377 /**************************************************************/
1378
vlsi_tx_timeout(struct net_device * ndev)1379 static void vlsi_tx_timeout(struct net_device *ndev)
1380 {
1381 vlsi_irda_dev_t *idev = netdev_priv(ndev);
1382
1383
1384 vlsi_reg_debug(ndev->base_addr, __func__);
1385 vlsi_ring_debug(idev->tx_ring);
1386
1387 if (netif_running(ndev))
1388 netif_stop_queue(ndev);
1389
1390 vlsi_stop_hw(idev);
1391
1392 /* now simply restart the whole thing */
1393
1394 if (!idev->new_baud)
1395 idev->new_baud = idev->baud; /* keep current baudrate */
1396
1397 if (vlsi_start_hw(idev))
1398 IRDA_ERROR("%s: failed to restart hw - %s(%s) unusable!\n",
1399 __func__, pci_name(idev->pdev), ndev->name);
1400 else
1401 netif_start_queue(ndev);
1402 }
1403
vlsi_ioctl(struct net_device * ndev,struct ifreq * rq,int cmd)1404 static int vlsi_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd)
1405 {
1406 vlsi_irda_dev_t *idev = netdev_priv(ndev);
1407 struct if_irda_req *irq = (struct if_irda_req *) rq;
1408 unsigned long flags;
1409 u16 fifocnt;
1410 int ret = 0;
1411
1412 switch (cmd) {
1413 case SIOCSBANDWIDTH:
1414 if (!capable(CAP_NET_ADMIN)) {
1415 ret = -EPERM;
1416 break;
1417 }
1418 spin_lock_irqsave(&idev->lock, flags);
1419 idev->new_baud = irq->ifr_baudrate;
1420 /* when called from userland there might be a minor race window here
1421 * if the stack tries to change speed concurrently - which would be
1422 * pretty strange anyway with the userland having full control...
1423 */
1424 vlsi_set_baud(idev, ndev->base_addr);
1425 spin_unlock_irqrestore(&idev->lock, flags);
1426 break;
1427 case SIOCSMEDIABUSY:
1428 if (!capable(CAP_NET_ADMIN)) {
1429 ret = -EPERM;
1430 break;
1431 }
1432 irda_device_set_media_busy(ndev, TRUE);
1433 break;
1434 case SIOCGRECEIVING:
1435 /* the best we can do: check whether there are any bytes in rx fifo.
1436 * The trustable window (in case some data arrives just afterwards)
1437 * may be as short as 1usec or so at 4Mbps.
1438 */
1439 fifocnt = inw(ndev->base_addr+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK;
1440 irq->ifr_receiving = (fifocnt!=0) ? 1 : 0;
1441 break;
1442 default:
1443 IRDA_WARNING("%s: notsupp - cmd=%04x\n",
1444 __func__, cmd);
1445 ret = -EOPNOTSUPP;
1446 }
1447
1448 return ret;
1449 }
1450
1451 /********************************************************/
1452
vlsi_interrupt(int irq,void * dev_instance)1453 static irqreturn_t vlsi_interrupt(int irq, void *dev_instance)
1454 {
1455 struct net_device *ndev = dev_instance;
1456 vlsi_irda_dev_t *idev = netdev_priv(ndev);
1457 unsigned iobase;
1458 u8 irintr;
1459 int boguscount = 5;
1460 unsigned long flags;
1461 int handled = 0;
1462
1463 iobase = ndev->base_addr;
1464 spin_lock_irqsave(&idev->lock,flags);
1465 do {
1466 irintr = inb(iobase+VLSI_PIO_IRINTR);
1467 mb();
1468 outb(irintr, iobase+VLSI_PIO_IRINTR); /* acknowledge asap */
1469
1470 if (!(irintr&=IRINTR_INT_MASK)) /* not our INT - probably shared */
1471 break;
1472
1473 handled = 1;
1474
1475 if (unlikely(!(irintr & ~IRINTR_ACTIVITY)))
1476 break; /* nothing todo if only activity */
1477
1478 if (irintr&IRINTR_RPKTINT)
1479 vlsi_rx_interrupt(ndev);
1480
1481 if (irintr&IRINTR_TPKTINT)
1482 vlsi_tx_interrupt(ndev);
1483
1484 } while (--boguscount > 0);
1485 spin_unlock_irqrestore(&idev->lock,flags);
1486
1487 if (boguscount <= 0)
1488 IRDA_MESSAGE("%s: too much work in interrupt!\n",
1489 __func__);
1490 return IRQ_RETVAL(handled);
1491 }
1492
1493 /********************************************************/
1494
vlsi_open(struct net_device * ndev)1495 static int vlsi_open(struct net_device *ndev)
1496 {
1497 vlsi_irda_dev_t *idev = netdev_priv(ndev);
1498 int err = -EAGAIN;
1499 char hwname[32];
1500
1501 if (pci_request_regions(idev->pdev, drivername)) {
1502 IRDA_WARNING("%s: io resource busy\n", __func__);
1503 goto errout;
1504 }
1505 ndev->base_addr = pci_resource_start(idev->pdev,0);
1506 ndev->irq = idev->pdev->irq;
1507
1508 /* under some rare occasions the chip apparently comes up with
1509 * IRQ's pending. We better w/c pending IRQ and disable them all
1510 */
1511
1512 outb(IRINTR_INT_MASK, ndev->base_addr+VLSI_PIO_IRINTR);
1513
1514 if (request_irq(ndev->irq, vlsi_interrupt, IRQF_SHARED,
1515 drivername, ndev)) {
1516 IRDA_WARNING("%s: couldn't get IRQ: %d\n",
1517 __func__, ndev->irq);
1518 goto errout_io;
1519 }
1520
1521 if ((err = vlsi_create_hwif(idev)) != 0)
1522 goto errout_irq;
1523
1524 sprintf(hwname, "VLSI-FIR @ 0x%04x", (unsigned)ndev->base_addr);
1525 idev->irlap = irlap_open(ndev,&idev->qos,hwname);
1526 if (!idev->irlap)
1527 goto errout_free_ring;
1528
1529 do_gettimeofday(&idev->last_rx); /* first mtt may start from now on */
1530
1531 idev->new_baud = 9600; /* start with IrPHY using 9600(SIR) mode */
1532
1533 if ((err = vlsi_start_hw(idev)) != 0)
1534 goto errout_close_irlap;
1535
1536 netif_start_queue(ndev);
1537
1538 IRDA_MESSAGE("%s: device %s operational\n", __func__, ndev->name);
1539
1540 return 0;
1541
1542 errout_close_irlap:
1543 irlap_close(idev->irlap);
1544 errout_free_ring:
1545 vlsi_destroy_hwif(idev);
1546 errout_irq:
1547 free_irq(ndev->irq,ndev);
1548 errout_io:
1549 pci_release_regions(idev->pdev);
1550 errout:
1551 return err;
1552 }
1553
vlsi_close(struct net_device * ndev)1554 static int vlsi_close(struct net_device *ndev)
1555 {
1556 vlsi_irda_dev_t *idev = netdev_priv(ndev);
1557
1558 netif_stop_queue(ndev);
1559
1560 if (idev->irlap)
1561 irlap_close(idev->irlap);
1562 idev->irlap = NULL;
1563
1564 vlsi_stop_hw(idev);
1565
1566 vlsi_destroy_hwif(idev);
1567
1568 free_irq(ndev->irq,ndev);
1569
1570 pci_release_regions(idev->pdev);
1571
1572 IRDA_MESSAGE("%s: device %s stopped\n", __func__, ndev->name);
1573
1574 return 0;
1575 }
1576
1577 static const struct net_device_ops vlsi_netdev_ops = {
1578 .ndo_open = vlsi_open,
1579 .ndo_stop = vlsi_close,
1580 .ndo_start_xmit = vlsi_hard_start_xmit,
1581 .ndo_do_ioctl = vlsi_ioctl,
1582 .ndo_tx_timeout = vlsi_tx_timeout,
1583 };
1584
vlsi_irda_init(struct net_device * ndev)1585 static int vlsi_irda_init(struct net_device *ndev)
1586 {
1587 vlsi_irda_dev_t *idev = netdev_priv(ndev);
1588 struct pci_dev *pdev = idev->pdev;
1589
1590 ndev->irq = pdev->irq;
1591 ndev->base_addr = pci_resource_start(pdev,0);
1592
1593 /* PCI busmastering
1594 * see include file for details why we need these 2 masks, in this order!
1595 */
1596
1597 if (pci_set_dma_mask(pdev,DMA_MASK_USED_BY_HW) ||
1598 pci_set_dma_mask(pdev,DMA_MASK_MSTRPAGE)) {
1599 IRDA_ERROR("%s: aborting due to PCI BM-DMA address limitations\n", __func__);
1600 return -1;
1601 }
1602
1603 irda_init_max_qos_capabilies(&idev->qos);
1604
1605 /* the VLSI82C147 does not support 576000! */
1606
1607 idev->qos.baud_rate.bits = IR_2400 | IR_9600
1608 | IR_19200 | IR_38400 | IR_57600 | IR_115200
1609 | IR_1152000 | (IR_4000000 << 8);
1610
1611 idev->qos.min_turn_time.bits = qos_mtt_bits;
1612
1613 irda_qos_bits_to_value(&idev->qos);
1614
1615 /* currently no public media definitions for IrDA */
1616
1617 ndev->flags |= IFF_PORTSEL | IFF_AUTOMEDIA;
1618 ndev->if_port = IF_PORT_UNKNOWN;
1619
1620 ndev->netdev_ops = &vlsi_netdev_ops;
1621 ndev->watchdog_timeo = 500*HZ/1000; /* max. allowed turn time for IrLAP */
1622
1623 SET_NETDEV_DEV(ndev, &pdev->dev);
1624
1625 return 0;
1626 }
1627
1628 /**************************************************************/
1629
1630 static int __devinit
vlsi_irda_probe(struct pci_dev * pdev,const struct pci_device_id * id)1631 vlsi_irda_probe(struct pci_dev *pdev, const struct pci_device_id *id)
1632 {
1633 struct net_device *ndev;
1634 vlsi_irda_dev_t *idev;
1635
1636 if (pci_enable_device(pdev))
1637 goto out;
1638 else
1639 pdev->current_state = 0; /* hw must be running now */
1640
1641 IRDA_MESSAGE("%s: IrDA PCI controller %s detected\n",
1642 drivername, pci_name(pdev));
1643
1644 if ( !pci_resource_start(pdev,0) ||
1645 !(pci_resource_flags(pdev,0) & IORESOURCE_IO) ) {
1646 IRDA_ERROR("%s: bar 0 invalid", __func__);
1647 goto out_disable;
1648 }
1649
1650 ndev = alloc_irdadev(sizeof(*idev));
1651 if (ndev==NULL) {
1652 IRDA_ERROR("%s: Unable to allocate device memory.\n",
1653 __func__);
1654 goto out_disable;
1655 }
1656
1657 idev = netdev_priv(ndev);
1658
1659 spin_lock_init(&idev->lock);
1660 mutex_init(&idev->mtx);
1661 mutex_lock(&idev->mtx);
1662 idev->pdev = pdev;
1663
1664 if (vlsi_irda_init(ndev) < 0)
1665 goto out_freedev;
1666
1667 if (register_netdev(ndev) < 0) {
1668 IRDA_ERROR("%s: register_netdev failed\n", __func__);
1669 goto out_freedev;
1670 }
1671
1672 if (vlsi_proc_root != NULL) {
1673 struct proc_dir_entry *ent;
1674
1675 ent = proc_create_data(ndev->name, S_IFREG|S_IRUGO,
1676 vlsi_proc_root, VLSI_PROC_FOPS, ndev);
1677 if (!ent) {
1678 IRDA_WARNING("%s: failed to create proc entry\n",
1679 __func__);
1680 } else {
1681 ent->size = 0;
1682 }
1683 idev->proc_entry = ent;
1684 }
1685 IRDA_MESSAGE("%s: registered device %s\n", drivername, ndev->name);
1686
1687 pci_set_drvdata(pdev, ndev);
1688 mutex_unlock(&idev->mtx);
1689
1690 return 0;
1691
1692 out_freedev:
1693 mutex_unlock(&idev->mtx);
1694 free_netdev(ndev);
1695 out_disable:
1696 pci_disable_device(pdev);
1697 out:
1698 pci_set_drvdata(pdev, NULL);
1699 return -ENODEV;
1700 }
1701
vlsi_irda_remove(struct pci_dev * pdev)1702 static void __devexit vlsi_irda_remove(struct pci_dev *pdev)
1703 {
1704 struct net_device *ndev = pci_get_drvdata(pdev);
1705 vlsi_irda_dev_t *idev;
1706
1707 if (!ndev) {
1708 IRDA_ERROR("%s: lost netdevice?\n", drivername);
1709 return;
1710 }
1711
1712 unregister_netdev(ndev);
1713
1714 idev = netdev_priv(ndev);
1715 mutex_lock(&idev->mtx);
1716 if (idev->proc_entry) {
1717 remove_proc_entry(ndev->name, vlsi_proc_root);
1718 idev->proc_entry = NULL;
1719 }
1720 mutex_unlock(&idev->mtx);
1721
1722 free_netdev(ndev);
1723
1724 pci_set_drvdata(pdev, NULL);
1725
1726 IRDA_MESSAGE("%s: %s removed\n", drivername, pci_name(pdev));
1727 }
1728
1729 #ifdef CONFIG_PM
1730
1731 /* The Controller doesn't provide PCI PM capabilities as defined by PCI specs.
1732 * Some of the Linux PCI-PM code however depends on this, for example in
1733 * pci_set_power_state(). So we have to take care to perform the required
1734 * operations on our own (particularly reflecting the pdev->current_state)
1735 * otherwise we might get cheated by pci-pm.
1736 */
1737
1738
vlsi_irda_suspend(struct pci_dev * pdev,pm_message_t state)1739 static int vlsi_irda_suspend(struct pci_dev *pdev, pm_message_t state)
1740 {
1741 struct net_device *ndev = pci_get_drvdata(pdev);
1742 vlsi_irda_dev_t *idev;
1743
1744 if (!ndev) {
1745 IRDA_ERROR("%s - %s: no netdevice\n",
1746 __func__, pci_name(pdev));
1747 return 0;
1748 }
1749 idev = netdev_priv(ndev);
1750 mutex_lock(&idev->mtx);
1751 if (pdev->current_state != 0) { /* already suspended */
1752 if (state.event > pdev->current_state) { /* simply go deeper */
1753 pci_set_power_state(pdev, pci_choose_state(pdev, state));
1754 pdev->current_state = state.event;
1755 }
1756 else
1757 IRDA_ERROR("%s - %s: invalid suspend request %u -> %u\n", __func__, pci_name(pdev), pdev->current_state, state.event);
1758 mutex_unlock(&idev->mtx);
1759 return 0;
1760 }
1761
1762 if (netif_running(ndev)) {
1763 netif_device_detach(ndev);
1764 vlsi_stop_hw(idev);
1765 pci_save_state(pdev);
1766 if (!idev->new_baud)
1767 /* remember speed settings to restore on resume */
1768 idev->new_baud = idev->baud;
1769 }
1770
1771 pci_set_power_state(pdev, pci_choose_state(pdev, state));
1772 pdev->current_state = state.event;
1773 idev->resume_ok = 1;
1774 mutex_unlock(&idev->mtx);
1775 return 0;
1776 }
1777
vlsi_irda_resume(struct pci_dev * pdev)1778 static int vlsi_irda_resume(struct pci_dev *pdev)
1779 {
1780 struct net_device *ndev = pci_get_drvdata(pdev);
1781 vlsi_irda_dev_t *idev;
1782
1783 if (!ndev) {
1784 IRDA_ERROR("%s - %s: no netdevice\n",
1785 __func__, pci_name(pdev));
1786 return 0;
1787 }
1788 idev = netdev_priv(ndev);
1789 mutex_lock(&idev->mtx);
1790 if (pdev->current_state == 0) {
1791 mutex_unlock(&idev->mtx);
1792 IRDA_WARNING("%s - %s: already resumed\n",
1793 __func__, pci_name(pdev));
1794 return 0;
1795 }
1796
1797 pci_set_power_state(pdev, PCI_D0);
1798 pdev->current_state = PM_EVENT_ON;
1799
1800 if (!idev->resume_ok) {
1801 /* should be obsolete now - but used to happen due to:
1802 * - pci layer initially setting pdev->current_state = 4 (unknown)
1803 * - pci layer did not walk the save_state-tree (might be APM problem)
1804 * so we could not refuse to suspend from undefined state
1805 * - vlsi_irda_suspend detected invalid state and refused to save
1806 * configuration for resume - but was too late to stop suspending
1807 * - vlsi_irda_resume got screwed when trying to resume from garbage
1808 *
1809 * now we explicitly set pdev->current_state = 0 after enabling the
1810 * device and independently resume_ok should catch any garbage config.
1811 */
1812 IRDA_WARNING("%s - hm, nothing to resume?\n", __func__);
1813 mutex_unlock(&idev->mtx);
1814 return 0;
1815 }
1816
1817 if (netif_running(ndev)) {
1818 pci_restore_state(pdev);
1819 vlsi_start_hw(idev);
1820 netif_device_attach(ndev);
1821 }
1822 idev->resume_ok = 0;
1823 mutex_unlock(&idev->mtx);
1824 return 0;
1825 }
1826
1827 #endif /* CONFIG_PM */
1828
1829 /*********************************************************/
1830
1831 static struct pci_driver vlsi_irda_driver = {
1832 .name = drivername,
1833 .id_table = vlsi_irda_table,
1834 .probe = vlsi_irda_probe,
1835 .remove = __devexit_p(vlsi_irda_remove),
1836 #ifdef CONFIG_PM
1837 .suspend = vlsi_irda_suspend,
1838 .resume = vlsi_irda_resume,
1839 #endif
1840 };
1841
1842 #define PROC_DIR ("driver/" DRIVER_NAME)
1843
vlsi_mod_init(void)1844 static int __init vlsi_mod_init(void)
1845 {
1846 int i, ret;
1847
1848 if (clksrc < 0 || clksrc > 3) {
1849 IRDA_ERROR("%s: invalid clksrc=%d\n", drivername, clksrc);
1850 return -1;
1851 }
1852
1853 for (i = 0; i < 2; i++) {
1854 switch(ringsize[i]) {
1855 case 4:
1856 case 8:
1857 case 16:
1858 case 32:
1859 case 64:
1860 break;
1861 default:
1862 IRDA_WARNING("%s: invalid %s ringsize %d, using default=8", drivername, (i)?"rx":"tx", ringsize[i]);
1863 ringsize[i] = 8;
1864 break;
1865 }
1866 }
1867
1868 sirpulse = !!sirpulse;
1869
1870 /* proc_mkdir returns NULL if !CONFIG_PROC_FS.
1871 * Failure to create the procfs entry is handled like running
1872 * without procfs - it's not required for the driver to work.
1873 */
1874 vlsi_proc_root = proc_mkdir(PROC_DIR, NULL);
1875
1876 ret = pci_register_driver(&vlsi_irda_driver);
1877
1878 if (ret && vlsi_proc_root)
1879 remove_proc_entry(PROC_DIR, NULL);
1880 return ret;
1881
1882 }
1883
vlsi_mod_exit(void)1884 static void __exit vlsi_mod_exit(void)
1885 {
1886 pci_unregister_driver(&vlsi_irda_driver);
1887 if (vlsi_proc_root)
1888 remove_proc_entry(PROC_DIR, NULL);
1889 }
1890
1891 module_init(vlsi_mod_init);
1892 module_exit(vlsi_mod_exit);
1893