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net: kill netif_copy_real_num_queues()
[deliverable/linux.git] / drivers / net / irda / vlsi_ir.c
CommitLineData
1da177e4
LT		 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
e8478de3 18 * along with this program; if not, see <http://www.gnu.org/licenses/>.
1da177e4
LT		 19 *
20 ********************************************************************/
21
1da177e4
LT		 22#include <linux/module.h>
23
24#define DRIVER_NAME "vlsi_ir"
25#define DRIVER_VERSION "v0.5"
26#define DRIVER_DESCRIPTION "IrDA SIR/MIR/FIR driver for VLSI 82C147"
27#define DRIVER_AUTHOR "Martin Diehl <info@mdiehl.de>"
28
29MODULE_DESCRIPTION(DRIVER_DESCRIPTION);
30MODULE_AUTHOR(DRIVER_AUTHOR);
31MODULE_LICENSE("GPL");
32
33/********************************************************/
34
35#include <linux/kernel.h>
36#include <linux/init.h>
a6b7a407 37#include <linux/interrupt.h>
1da177e4
LT		 38#include <linux/pci.h>
39#include <linux/slab.h>
40#include <linux/netdevice.h>
41#include <linux/skbuff.h>
42#include <linux/delay.h>
43#include <linux/time.h>
44#include <linux/proc_fs.h>
45#include <linux/seq_file.h>
aa429110 46#include <linux/mutex.h>
1da177e4
LT		 47#include <asm/uaccess.h>
48#include <asm/byteorder.h>
49
50#include <net/irda/irda.h>
51#include <net/irda/irda_device.h>
52#include <net/irda/wrapper.h>
53#include <net/irda/crc.h>
54
55#include "vlsi_ir.h"
56
57/********************************************************/
58
59static /* const */ char drivername[] = DRIVER_NAME;
60
9baa3c34 61static const struct pci_device_id vlsi_irda_table[] = {
1da177e4
LT		 62 {
63 .class = PCI_CLASS_WIRELESS_IRDA << 8,
64 .class_mask = PCI_CLASS_SUBCLASS_MASK << 8,
65 .vendor = PCI_VENDOR_ID_VLSI,
66 .device = PCI_DEVICE_ID_VLSI_82C147,
67 .subvendor = PCI_ANY_ID,
68 .subdevice = PCI_ANY_ID,
69 },
70 { /* all zeroes */ }
71};
72
73MODULE_DEVICE_TABLE(pci, vlsi_irda_table);
74
75/********************************************************/
76
77/* clksrc: which clock source to be used
78 * 0: auto - try PLL, fallback to 40MHz XCLK
79 * 1: on-chip 48MHz PLL
80 * 2: external 48MHz XCLK
81 * 3: external 40MHz XCLK (HP OB-800)
82 */
83
84static int clksrc = 0; /* default is 0(auto) */
85module_param(clksrc, int, 0);
86MODULE_PARM_DESC(clksrc, "clock input source selection");
87
88/* ringsize: size of the tx and rx descriptor rings
89 * independent for tx and rx
90 * specify as ringsize=tx[,rx]
91 * allowed values: 4, 8, 16, 32, 64
92 * Due to the IrDA 1.x max. allowed window size=7,
93 * there should be no gain when using rings larger than 8
94 */
95
96static int ringsize[] = {8,8}; /* default is tx=8 / rx=8 */
97module_param_array(ringsize, int, NULL, 0);
98MODULE_PARM_DESC(ringsize, "TX, RX ring descriptor size");
99
100/* sirpulse: tuning of the SIR pulse width within IrPHY 1.3 limits
101 * 0: very short, 1.5us (exception: 6us at 2.4 kbaud)
102 * 1: nominal 3/16 bittime width
103 * note: IrDA compliant peer devices should be happy regardless
104 * which one is used. Primary goal is to save some power
105 * on the sender's side - at 9.6kbaud for example the short
106 * pulse width saves more than 90% of the transmitted IR power.
107 */
108
109static int sirpulse = 1; /* default is 3/16 bittime */
110module_param(sirpulse, int, 0);
111MODULE_PARM_DESC(sirpulse, "SIR pulse width tuning");
112
113/* qos_mtt_bits: encoded min-turn-time value we require the peer device
114 * to use before transmitting to us. "Type 1" (per-station)
115 * bitfield according to IrLAP definition (section 6.6.8)
116 * Don't know which transceiver is used by my OB800 - the
117 * pretty common HP HDLS-1100 requires 1 msec - so lets use this.
118 */
119
120static int qos_mtt_bits = 0x07; /* default is 1 ms or more */
121module_param(qos_mtt_bits, int, 0);
122MODULE_PARM_DESC(qos_mtt_bits, "IrLAP bitfield representing min-turn-time");
123
124/********************************************************/
125
126static void vlsi_reg_debug(unsigned iobase, const char *s)
127{
128 int i;
129
130 printk(KERN_DEBUG "%s: ", s);
131 for (i = 0; i < 0x20; i++)
132 printk("%02x", (unsigned)inb((iobase+i)));
133 printk("\n");
134}
135
136static void vlsi_ring_debug(struct vlsi_ring *r)
137{
138 struct ring_descr *rd;
139 unsigned i;
140
141 printk(KERN_DEBUG "%s - ring %p / size %u / mask 0x%04x / len %u / dir %d / hw %p\n",
a97a6f10
HH		 142 __func__, r, r->size, r->mask, r->len, r->dir, r->rd[0].hw);
143 printk(KERN_DEBUG "%s - head = %d / tail = %d\n", __func__,
1da177e4
LT		 144 atomic_read(&r->head) & r->mask, atomic_read(&r->tail) & r->mask);
145 for (i = 0; i < r->size; i++) {
146 rd = &r->rd[i];
a97a6f10 147 printk(KERN_DEBUG "%s - ring descr %u: ", __func__, i);
1da177e4
LT		 148 printk("skb=%p data=%p hw=%p\n", rd->skb, rd->buf, rd->hw);
149 printk(KERN_DEBUG "%s - hw: status=%02x count=%u addr=0x%08x\n",
a97a6f10 150 __func__, (unsigned) rd_get_status(rd),
1da177e4
LT		 151 (unsigned) rd_get_count(rd), (unsigned) rd_get_addr(rd));
152 }
153}
154
155/********************************************************/
156
157/* needed regardless of CONFIG_PROC_FS */
158static struct proc_dir_entry *vlsi_proc_root = NULL;
159
160#ifdef CONFIG_PROC_FS
161
162static void vlsi_proc_pdev(struct seq_file *seq, struct pci_dev *pdev)
163{
164 unsigned iobase = pci_resource_start(pdev, 0);
165 unsigned i;
166
978e9aec 167 seq_printf(seq, "\n%s (vid/did: [%04x:%04x])\n",
778a43fd 168 pci_name(pdev), (int)pdev->vendor, (int)pdev->device);
1da177e4
LT		 169 seq_printf(seq, "pci-power-state: %u\n", (unsigned) pdev->current_state);
170 seq_printf(seq, "resources: irq=%u / io=0x%04x / dma_mask=0x%016Lx\n",
171 pdev->irq, (unsigned)pci_resource_start(pdev, 0), (unsigned long long)pdev->dma_mask);
172 seq_printf(seq, "hw registers: ");
173 for (i = 0; i < 0x20; i++)
174 seq_printf(seq, "%02x", (unsigned)inb((iobase+i)));
175 seq_printf(seq, "\n");
176}
177
178static void vlsi_proc_ndev(struct seq_file *seq, struct net_device *ndev)
179{
4cf1653a 180 vlsi_irda_dev_t *idev = netdev_priv(ndev);
1da177e4
LT		 181 u8 byte;
182 u16 word;
183 unsigned delta1, delta2;
184 struct timeval now;
185 unsigned iobase = ndev->base_addr;
186
187 seq_printf(seq, "\n%s link state: %s / %s / %s / %s\n", ndev->name,
188 netif_device_present(ndev) ? "attached" : "detached",
189 netif_running(ndev) ? "running" : "not running",
190 netif_carrier_ok(ndev) ? "carrier ok" : "no carrier",
191 netif_queue_stopped(ndev) ? "queue stopped" : "queue running");
192
193 if (!netif_running(ndev))
194 return;
195
196 seq_printf(seq, "\nhw-state:\n");
197 pci_read_config_byte(idev->pdev, VLSI_PCI_IRMISC, &byte);
198 seq_printf(seq, "IRMISC:%s%s%s uart%s",
199 (byte&IRMISC_IRRAIL) ? " irrail" : "",
200 (byte&IRMISC_IRPD) ? " irpd" : "",
201 (byte&IRMISC_UARTTST) ? " uarttest" : "",
202 (byte&IRMISC_UARTEN) ? "@" : " disabled\n");
203 if (byte&IRMISC_UARTEN) {
204 seq_printf(seq, "0x%s\n",
205 (byte&2) ? ((byte&1) ? "3e8" : "2e8")
206 : ((byte&1) ? "3f8" : "2f8"));
207 }
208 pci_read_config_byte(idev->pdev, VLSI_PCI_CLKCTL, &byte);
209 seq_printf(seq, "CLKCTL: PLL %s%s%s / clock %s / wakeup %s\n",
210 (byte&CLKCTL_PD_INV) ? "powered" : "down",
211 (byte&CLKCTL_LOCK) ? " locked" : "",
212 (byte&CLKCTL_EXTCLK) ? ((byte&CLKCTL_XCKSEL)?" / 40 MHz XCLK":" / 48 MHz XCLK") : "",
213 (byte&CLKCTL_CLKSTP) ? "stopped" : "running",
214 (byte&CLKCTL_WAKE) ? "enabled" : "disabled");
215 pci_read_config_byte(idev->pdev, VLSI_PCI_MSTRPAGE, &byte);
216 seq_printf(seq, "MSTRPAGE: 0x%02x\n", (unsigned)byte);
217
218 byte = inb(iobase+VLSI_PIO_IRINTR);
219 seq_printf(seq, "IRINTR:%s%s%s%s%s%s%s%s\n",
220 (byte&IRINTR_ACTEN) ? " ACTEN" : "",
221 (byte&IRINTR_RPKTEN) ? " RPKTEN" : "",
222 (byte&IRINTR_TPKTEN) ? " TPKTEN" : "",
223 (byte&IRINTR_OE_EN) ? " OE_EN" : "",
224 (byte&IRINTR_ACTIVITY) ? " ACTIVITY" : "",
225 (byte&IRINTR_RPKTINT) ? " RPKTINT" : "",
226 (byte&IRINTR_TPKTINT) ? " TPKTINT" : "",
227 (byte&IRINTR_OE_INT) ? " OE_INT" : "");
228 word = inw(iobase+VLSI_PIO_RINGPTR);
229 seq_printf(seq, "RINGPTR: rx=%u / tx=%u\n", RINGPTR_GET_RX(word), RINGPTR_GET_TX(word));
230 word = inw(iobase+VLSI_PIO_RINGBASE);
231 seq_printf(seq, "RINGBASE: busmap=0x%08x\n",
232 ((unsigned)word << 10)|(MSTRPAGE_VALUE<<24));
233 word = inw(iobase+VLSI_PIO_RINGSIZE);
234 seq_printf(seq, "RINGSIZE: rx=%u / tx=%u\n", RINGSIZE_TO_RXSIZE(word),
235 RINGSIZE_TO_TXSIZE(word));
236
237 word = inw(iobase+VLSI_PIO_IRCFG);
238 seq_printf(seq, "IRCFG:%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
239 (word&IRCFG_LOOP) ? " LOOP" : "",
240 (word&IRCFG_ENTX) ? " ENTX" : "",
241 (word&IRCFG_ENRX) ? " ENRX" : "",
242 (word&IRCFG_MSTR) ? " MSTR" : "",
243 (word&IRCFG_RXANY) ? " RXANY" : "",
244 (word&IRCFG_CRC16) ? " CRC16" : "",
245 (word&IRCFG_FIR) ? " FIR" : "",
246 (word&IRCFG_MIR) ? " MIR" : "",
247 (word&IRCFG_SIR) ? " SIR" : "",
248 (word&IRCFG_SIRFILT) ? " SIRFILT" : "",
249 (word&IRCFG_SIRTEST) ? " SIRTEST" : "",
250 (word&IRCFG_TXPOL) ? " TXPOL" : "",
251 (word&IRCFG_RXPOL) ? " RXPOL" : "");
252 word = inw(iobase+VLSI_PIO_IRENABLE);
253 seq_printf(seq, "IRENABLE:%s%s%s%s%s%s%s%s\n",
254 (word&IRENABLE_PHYANDCLOCK) ? " PHYANDCLOCK" : "",
255 (word&IRENABLE_CFGER) ? " CFGERR" : "",
256 (word&IRENABLE_FIR_ON) ? " FIR_ON" : "",
257 (word&IRENABLE_MIR_ON) ? " MIR_ON" : "",
258 (word&IRENABLE_SIR_ON) ? " SIR_ON" : "",
259 (word&IRENABLE_ENTXST) ? " ENTXST" : "",
260 (word&IRENABLE_ENRXST) ? " ENRXST" : "",
261 (word&IRENABLE_CRC16_ON) ? " CRC16_ON" : "");
262 word = inw(iobase+VLSI_PIO_PHYCTL);
263 seq_printf(seq, "PHYCTL: baud-divisor=%u / pulsewidth=%u / preamble=%u\n",
264 (unsigned)PHYCTL_TO_BAUD(word),
265 (unsigned)PHYCTL_TO_PLSWID(word),
266 (unsigned)PHYCTL_TO_PREAMB(word));
267 word = inw(iobase+VLSI_PIO_NPHYCTL);
268 seq_printf(seq, "NPHYCTL: baud-divisor=%u / pulsewidth=%u / preamble=%u\n",
269 (unsigned)PHYCTL_TO_BAUD(word),
270 (unsigned)PHYCTL_TO_PLSWID(word),
271 (unsigned)PHYCTL_TO_PREAMB(word));
272 word = inw(iobase+VLSI_PIO_MAXPKT);
273 seq_printf(seq, "MAXPKT: max. rx packet size = %u\n", word);
274 word = inw(iobase+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK;
275 seq_printf(seq, "RCVBCNT: rx-fifo filling level = %u\n", word);
276
277 seq_printf(seq, "\nsw-state:\n");
278 seq_printf(seq, "IrPHY setup: %d baud - %s encoding\n", idev->baud,
279 (idev->mode==IFF_SIR)?"SIR":((idev->mode==IFF_MIR)?"MIR":"FIR"));
280 do_gettimeofday(&now);
281 if (now.tv_usec >= idev->last_rx.tv_usec) {
282 delta2 = now.tv_usec - idev->last_rx.tv_usec;
283 delta1 = 0;
284 }
285 else {
286 delta2 = 1000000 + now.tv_usec - idev->last_rx.tv_usec;
287 delta1 = 1;
288 }
289 seq_printf(seq, "last rx: %lu.%06u sec\n",
290 now.tv_sec - idev->last_rx.tv_sec - delta1, delta2);
291
292 seq_printf(seq, "RX: packets=%lu / bytes=%lu / errors=%lu / dropped=%lu",
af049081
SH		 293 ndev->stats.rx_packets, ndev->stats.rx_bytes, ndev->stats.rx_errors,
294 ndev->stats.rx_dropped);
1da177e4 295 seq_printf(seq, " / overrun=%lu / length=%lu / frame=%lu / crc=%lu\n",
af049081
SH		 296 ndev->stats.rx_over_errors, ndev->stats.rx_length_errors,
297 ndev->stats.rx_frame_errors, ndev->stats.rx_crc_errors);
1da177e4 298 seq_printf(seq, "TX: packets=%lu / bytes=%lu / errors=%lu / dropped=%lu / fifo=%lu\n",
af049081
SH		 299 ndev->stats.tx_packets, ndev->stats.tx_bytes, ndev->stats.tx_errors,
300 ndev->stats.tx_dropped, ndev->stats.tx_fifo_errors);
1da177e4
LT		 301
302}
303
304static void vlsi_proc_ring(struct seq_file *seq, struct vlsi_ring *r)
305{
306 struct ring_descr *rd;
307 unsigned i, j;
308 int h, t;
309
310 seq_printf(seq, "size %u / mask 0x%04x / len %u / dir %d / hw %p\n",
311 r->size, r->mask, r->len, r->dir, r->rd[0].hw);
312 h = atomic_read(&r->head) & r->mask;
313 t = atomic_read(&r->tail) & r->mask;
314 seq_printf(seq, "head = %d / tail = %d ", h, t);
315 if (h == t)
316 seq_printf(seq, "(empty)\n");
317 else {
318 if (((t+1)&r->mask) == h)
319 seq_printf(seq, "(full)\n");
320 else
321 seq_printf(seq, "(level = %d)\n", ((unsigned)(t-h) & r->mask));
322 rd = &r->rd[h];
323 j = (unsigned) rd_get_count(rd);
324 seq_printf(seq, "current: rd = %d / status = %02x / len = %u\n",
325 h, (unsigned)rd_get_status(rd), j);
326 if (j > 0) {
be07b79d
AS		 327 seq_printf(seq, " data: %*ph\n",
328 min_t(unsigned, j, 20), rd->buf);
1da177e4
LT		 329 }
330 }
331 for (i = 0; i < r->size; i++) {
332 rd = &r->rd[i];
333 seq_printf(seq, "> ring descr %u: ", i);
334 seq_printf(seq, "skb=%p data=%p hw=%p\n", rd->skb, rd->buf, rd->hw);
335 seq_printf(seq, " hw: status=%02x count=%u busaddr=0x%08x\n",
336 (unsigned) rd_get_status(rd),
337 (unsigned) rd_get_count(rd), (unsigned) rd_get_addr(rd));
338 }
339}
340
341static int vlsi_seq_show(struct seq_file *seq, void *v)
342{
343 struct net_device *ndev = seq->private;
4cf1653a 344 vlsi_irda_dev_t *idev = netdev_priv(ndev);
1da177e4
LT		 345 unsigned long flags;
346
347 seq_printf(seq, "\n%s %s\n\n", DRIVER_NAME, DRIVER_VERSION);
348 seq_printf(seq, "clksrc: %s\n",
349 (clksrc>=2) ? ((clksrc==3)?"40MHz XCLK":"48MHz XCLK")
350 : ((clksrc==1)?"48MHz PLL":"autodetect"));
351 seq_printf(seq, "ringsize: tx=%d / rx=%d\n",
352 ringsize[0], ringsize[1]);
353 seq_printf(seq, "sirpulse: %s\n", (sirpulse)?"3/16 bittime":"short");
354 seq_printf(seq, "qos_mtt_bits: 0x%02x\n", (unsigned)qos_mtt_bits);
355
356 spin_lock_irqsave(&idev->lock, flags);
357 if (idev->pdev != NULL) {
358 vlsi_proc_pdev(seq, idev->pdev);
359
360 if (idev->pdev->current_state == 0)
361 vlsi_proc_ndev(seq, ndev);
362 else
363 seq_printf(seq, "\nPCI controller down - resume_ok = %d\n",
364 idev->resume_ok);
365 if (netif_running(ndev) && idev->rx_ring && idev->tx_ring) {
366 seq_printf(seq, "\n--------- RX ring -----------\n\n");
367 vlsi_proc_ring(seq, idev->rx_ring);
368 seq_printf(seq, "\n--------- TX ring -----------\n\n");
369 vlsi_proc_ring(seq, idev->tx_ring);
370 }
371 }
372 seq_printf(seq, "\n");
373 spin_unlock_irqrestore(&idev->lock, flags);
374
375 return 0;
376}
377
378static int vlsi_seq_open(struct inode *inode, struct file *file)
379{
d9dda78b 380 return single_open(file, vlsi_seq_show, PDE_DATA(inode));
1da177e4
LT		 381}
382
d54b1fdb 383static const struct file_operations vlsi_proc_fops = {
1da177e4
LT		 384 .owner = THIS_MODULE,
385 .open = vlsi_seq_open,
386 .read = seq_read,
387 .llseek = seq_lseek,
388 .release = single_release,
389};
390
391#define VLSI_PROC_FOPS (&vlsi_proc_fops)
392
393#else /* CONFIG_PROC_FS */
394#define VLSI_PROC_FOPS NULL
395#endif
396
397/********************************************************/
398
399static struct vlsi_ring *vlsi_alloc_ring(struct pci_dev *pdev, struct ring_descr_hw *hwmap,
400 unsigned size, unsigned len, int dir)
401{
402 struct vlsi_ring *r;
403 struct ring_descr *rd;
404 unsigned i, j;
405 dma_addr_t busaddr;
406
407 if (!size || ((size-1)&size)!=0) /* must be >0 and power of 2 */
408 return NULL;
409
410 r = kmalloc(sizeof(*r) + size * sizeof(struct ring_descr), GFP_KERNEL);
411 if (!r)
412 return NULL;
413 memset(r, 0, sizeof(*r));
414
415 r->pdev = pdev;
416 r->dir = dir;
417 r->len = len;
418 r->rd = (struct ring_descr *)(r+1);
419 r->mask = size - 1;
420 r->size = size;
421 atomic_set(&r->head, 0);
422 atomic_set(&r->tail, 0);
423
424 for (i = 0; i < size; i++) {
425 rd = r->rd + i;
426 memset(rd, 0, sizeof(*rd));
427 rd->hw = hwmap + i;
428 rd->buf = kmalloc(len, GFP_KERNEL|GFP_DMA);
8e95a202
JP		 429 if (rd->buf == NULL ||
430 !(busaddr = pci_map_single(pdev, rd->buf, len, dir))) {
1da177e4
LT		 431 if (rd->buf) {
432 IRDA_ERROR("%s: failed to create PCI-MAP for %p",
a97a6f10 433 __func__, rd->buf);
1da177e4
LT		 434 kfree(rd->buf);
435 rd->buf = NULL;
436 }
437 for (j = 0; j < i; j++) {
438 rd = r->rd + j;
439 busaddr = rd_get_addr(rd);
440 rd_set_addr_status(rd, 0, 0);
441 if (busaddr)
442 pci_unmap_single(pdev, busaddr, len, dir);
443 kfree(rd->buf);
444 rd->buf = NULL;
445 }
446 kfree(r);
447 return NULL;
448 }
449 rd_set_addr_status(rd, busaddr, 0);
450 /* initially, the dma buffer is owned by the CPU */
451 rd->skb = NULL;
452 }
453 return r;
454}
455
456static int vlsi_free_ring(struct vlsi_ring *r)
457{
458 struct ring_descr *rd;
459 unsigned i;
460 dma_addr_t busaddr;
461
462 for (i = 0; i < r->size; i++) {
463 rd = r->rd + i;
464 if (rd->skb)
465 dev_kfree_skb_any(rd->skb);
466 busaddr = rd_get_addr(rd);
467 rd_set_addr_status(rd, 0, 0);
468 if (busaddr)
469 pci_unmap_single(r->pdev, busaddr, r->len, r->dir);
b4558ea9 470 kfree(rd->buf);
1da177e4
LT		 471 }
472 kfree(r);
473 return 0;
474}
475
476static int vlsi_create_hwif(vlsi_irda_dev_t *idev)
477{
478 char *ringarea;
479 struct ring_descr_hw *hwmap;
480
481 idev->virtaddr = NULL;
482 idev->busaddr = 0;
483
38537b7f
JP		 484 ringarea = pci_zalloc_consistent(idev->pdev, HW_RING_AREA_SIZE,
485 &idev->busaddr);
1da177e4
LT		 486 if (!ringarea) {
487 IRDA_ERROR("%s: insufficient memory for descriptor rings\n",
a97a6f10 488 __func__);
1da177e4
LT		 489 goto out;
490 }
1da177e4
LT		 491
492 hwmap = (struct ring_descr_hw *)ringarea;
493 idev->rx_ring = vlsi_alloc_ring(idev->pdev, hwmap, ringsize[1],
494 XFER_BUF_SIZE, PCI_DMA_FROMDEVICE);
495 if (idev->rx_ring == NULL)
496 goto out_unmap;
497
498 hwmap += MAX_RING_DESCR;
499 idev->tx_ring = vlsi_alloc_ring(idev->pdev, hwmap, ringsize[0],
500 XFER_BUF_SIZE, PCI_DMA_TODEVICE);
501 if (idev->tx_ring == NULL)
502 goto out_free_rx;
503
504 idev->virtaddr = ringarea;
505 return 0;
506
507out_free_rx:
508 vlsi_free_ring(idev->rx_ring);
509out_unmap:
510 idev->rx_ring = idev->tx_ring = NULL;
511 pci_free_consistent(idev->pdev, HW_RING_AREA_SIZE, ringarea, idev->busaddr);
512 idev->busaddr = 0;
513out:
514 return -ENOMEM;
515}
516
517static int vlsi_destroy_hwif(vlsi_irda_dev_t *idev)
518{
519 vlsi_free_ring(idev->rx_ring);
520 vlsi_free_ring(idev->tx_ring);
521 idev->rx_ring = idev->tx_ring = NULL;
522
523 if (idev->busaddr)
524 pci_free_consistent(idev->pdev,HW_RING_AREA_SIZE,idev->virtaddr,idev->busaddr);
525
526 idev->virtaddr = NULL;
527 idev->busaddr = 0;
528
529 return 0;
530}
531
532/********************************************************/
533
534static int vlsi_process_rx(struct vlsi_ring *r, struct ring_descr *rd)
535{
536 u16 status;
537 int crclen, len = 0;
538 struct sk_buff *skb;
539 int ret = 0;
1ecfd462 540 struct net_device *ndev = pci_get_drvdata(r->pdev);
4cf1653a 541 vlsi_irda_dev_t *idev = netdev_priv(ndev);
1da177e4
LT		 542
543 pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir);
544 /* dma buffer now owned by the CPU */
545 status = rd_get_status(rd);
546 if (status & RD_RX_ERROR) {
547 if (status & RD_RX_OVER)
548 ret |= VLSI_RX_OVER;
549 if (status & RD_RX_LENGTH)
550 ret |= VLSI_RX_LENGTH;
551 if (status & RD_RX_PHYERR)
552 ret |= VLSI_RX_FRAME;
553 if (status & RD_RX_CRCERR)
554 ret |= VLSI_RX_CRC;
555 goto done;
556 }
557
558 len = rd_get_count(rd);
559 crclen = (idev->mode==IFF_FIR) ? sizeof(u32) : sizeof(u16);
560 len -= crclen; /* remove trailing CRC */
561 if (len <= 0) {
a97a6f10 562 IRDA_DEBUG(0, "%s: strange frame (len=%d)\n", __func__, len);
1da177e4
LT		 563 ret |= VLSI_RX_DROP;
564 goto done;
565 }
566
567 if (idev->mode == IFF_SIR) { /* hw checks CRC in MIR, FIR mode */
568
569 /* rd->buf is a streaming PCI_DMA_FROMDEVICE map. Doing the
570 * endian-adjustment there just in place will dirty a cache line
571 * which belongs to the map and thus we must be sure it will
572 * get flushed before giving the buffer back to hardware.
573 * vlsi_fill_rx() will do this anyway - but here we rely on.
574 */
575 le16_to_cpus(rd->buf+len);
576 if (irda_calc_crc16(INIT_FCS,rd->buf,len+crclen) != GOOD_FCS) {
a97a6f10 577 IRDA_DEBUG(0, "%s: crc error\n", __func__);
1da177e4
LT		 578 ret |= VLSI_RX_CRC;
579 goto done;
580 }
581 }
582
583 if (!rd->skb) {
a97a6f10 584 IRDA_WARNING("%s: rx packet lost\n", __func__);
1da177e4
LT		 585 ret |= VLSI_RX_DROP;
586 goto done;
587 }
588
589 skb = rd->skb;
590 rd->skb = NULL;
591 skb->dev = ndev;
592 memcpy(skb_put(skb,len), rd->buf, len);
459a98ed 593 skb_reset_mac_header(skb);
1da177e4
LT		 594 if (in_interrupt())
595 netif_rx(skb);
596 else
597 netif_rx_ni(skb);
1da177e4
LT		 598
599done:
600 rd_set_status(rd, 0);
601 rd_set_count(rd, 0);
602 /* buffer still owned by CPU */
603
604 return (ret) ? -ret : len;
605}
606
607static void vlsi_fill_rx(struct vlsi_ring *r)
608{
609 struct ring_descr *rd;
610
611 for (rd = ring_last(r); rd != NULL; rd = ring_put(r)) {
612 if (rd_is_active(rd)) {
613 IRDA_WARNING("%s: driver bug: rx descr race with hw\n",
a97a6f10 614 __func__);
1da177e4
LT		 615 vlsi_ring_debug(r);
616 break;
617 }
618 if (!rd->skb) {
619 rd->skb = dev_alloc_skb(IRLAP_SKB_ALLOCSIZE);
620 if (rd->skb) {
621 skb_reserve(rd->skb,1);
622 rd->skb->protocol = htons(ETH_P_IRDA);
623 }
624 else
625 break; /* probably not worth logging? */
626 }
627 /* give dma buffer back to busmaster */
628 pci_dma_sync_single_for_device(r->pdev, rd_get_addr(rd), r->len, r->dir);
629 rd_activate(rd);
630 }
631}
632
633static void vlsi_rx_interrupt(struct net_device *ndev)
634{
4cf1653a 635 vlsi_irda_dev_t *idev = netdev_priv(ndev);
1da177e4
LT		 636 struct vlsi_ring *r = idev->rx_ring;
637 struct ring_descr *rd;
638 int ret;
639
640 for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) {
641
642 if (rd_is_active(rd))
643 break;
644
645 ret = vlsi_process_rx(r, rd);
646
647 if (ret < 0) {
648 ret = -ret;
af049081 649 ndev->stats.rx_errors++;
1da177e4 650 if (ret & VLSI_RX_DROP)
af049081 651 ndev->stats.rx_dropped++;
1da177e4 652 if (ret & VLSI_RX_OVER)
af049081 653 ndev->stats.rx_over_errors++;
1da177e4 654 if (ret & VLSI_RX_LENGTH)
af049081 655 ndev->stats.rx_length_errors++;
1da177e4 656 if (ret & VLSI_RX_FRAME)
af049081 657 ndev->stats.rx_frame_errors++;
1da177e4 658 if (ret & VLSI_RX_CRC)
af049081 659 ndev->stats.rx_crc_errors++;
1da177e4
LT		 660 }
661 else if (ret > 0) {
af049081
SH		 662 ndev->stats.rx_packets++;
663 ndev->stats.rx_bytes += ret;
1da177e4
LT		 664 }
665 }
666
667 do_gettimeofday(&idev->last_rx); /* remember "now" for later mtt delay */
668
669 vlsi_fill_rx(r);
670
671 if (ring_first(r) == NULL) {
672 /* we are in big trouble, if this should ever happen */
a97a6f10 673 IRDA_ERROR("%s: rx ring exhausted!\n", __func__);
1da177e4
LT		 674 vlsi_ring_debug(r);
675 }
676 else
677 outw(0, ndev->base_addr+VLSI_PIO_PROMPT);
678}
679
680/* caller must have stopped the controller from busmastering */
681
682static void vlsi_unarm_rx(vlsi_irda_dev_t *idev)
683{
af049081 684 struct net_device *ndev = pci_get_drvdata(idev->pdev);
1da177e4
LT		 685 struct vlsi_ring *r = idev->rx_ring;
686 struct ring_descr *rd;
687 int ret;
688
689 for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) {
690
691 ret = 0;
692 if (rd_is_active(rd)) {
693 rd_set_status(rd, 0);
694 if (rd_get_count(rd)) {
a97a6f10 695 IRDA_DEBUG(0, "%s - dropping rx packet\n", __func__);
1da177e4
LT		 696 ret = -VLSI_RX_DROP;
697 }
698 rd_set_count(rd, 0);
699 pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir);
700 if (rd->skb) {
701 dev_kfree_skb_any(rd->skb);
702 rd->skb = NULL;
703 }
704 }
705 else
706 ret = vlsi_process_rx(r, rd);
707
708 if (ret < 0) {
709 ret = -ret;
af049081 710 ndev->stats.rx_errors++;
1da177e4 711 if (ret & VLSI_RX_DROP)
af049081 712 ndev->stats.rx_dropped++;
1da177e4 713 if (ret & VLSI_RX_OVER)
af049081 714 ndev->stats.rx_over_errors++;
1da177e4 715 if (ret & VLSI_RX_LENGTH)
af049081 716 ndev->stats.rx_length_errors++;
1da177e4 717 if (ret & VLSI_RX_FRAME)
af049081 718 ndev->stats.rx_frame_errors++;
1da177e4 719 if (ret & VLSI_RX_CRC)
af049081 720 ndev->stats.rx_crc_errors++;
1da177e4
LT		 721 }
722 else if (ret > 0) {
af049081
SH		 723 ndev->stats.rx_packets++;
724 ndev->stats.rx_bytes += ret;
1da177e4
LT		 725 }
726 }
727}
728
729/********************************************************/
730
731static int vlsi_process_tx(struct vlsi_ring *r, struct ring_descr *rd)
732{
733 u16 status;
734 int len;
735 int ret;
736
737 pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir);
738 /* dma buffer now owned by the CPU */
739 status = rd_get_status(rd);
740 if (status & RD_TX_UNDRN)
741 ret = VLSI_TX_FIFO;
742 else
743 ret = 0;
744 rd_set_status(rd, 0);
745
746 if (rd->skb) {
747 len = rd->skb->len;
748 dev_kfree_skb_any(rd->skb);
749 rd->skb = NULL;
750 }
751 else /* tx-skb already freed? - should never happen */
752 len = rd_get_count(rd); /* incorrect for SIR! (due to wrapping) */
753
754 rd_set_count(rd, 0);
755 /* dma buffer still owned by the CPU */
756
757 return (ret) ? -ret : len;
758}
759
760static int vlsi_set_baud(vlsi_irda_dev_t *idev, unsigned iobase)
761{
762 u16 nphyctl;
763 u16 config;
764 unsigned mode;
765 int ret;
766 int baudrate;
767 int fifocnt;
768
769 baudrate = idev->new_baud;
a97a6f10 770 IRDA_DEBUG(2, "%s: %d -> %d\n", __func__, idev->baud, idev->new_baud);
1da177e4
LT		 771 if (baudrate == 4000000) {
772 mode = IFF_FIR;
773 config = IRCFG_FIR;
774 nphyctl = PHYCTL_FIR;
775 }
776 else if (baudrate == 1152000) {
777 mode = IFF_MIR;
778 config = IRCFG_MIR | IRCFG_CRC16;
779 nphyctl = PHYCTL_MIR(clksrc==3);
780 }
781 else {
782 mode = IFF_SIR;
783 config = IRCFG_SIR | IRCFG_SIRFILT | IRCFG_RXANY;
784 switch(baudrate) {
785 default:
786 IRDA_WARNING("%s: undefined baudrate %d - fallback to 9600!\n",
a97a6f10 787 __func__, baudrate);
1da177e4
LT		 788 baudrate = 9600;
789 /* fallthru */
790 case 2400:
791 case 9600:
792 case 19200:
793 case 38400:
794 case 57600:
795 case 115200:
796 nphyctl = PHYCTL_SIR(baudrate,sirpulse,clksrc==3);
797 break;
798 }
799 }
800 config |= IRCFG_MSTR | IRCFG_ENRX;
801
802 fifocnt = inw(iobase+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK;
803 if (fifocnt != 0) {
a97a6f10 804 IRDA_DEBUG(0, "%s: rx fifo not empty(%d)\n", __func__, fifocnt);
1da177e4
LT		 805 }
806
807 outw(0, iobase+VLSI_PIO_IRENABLE);
808 outw(config, iobase+VLSI_PIO_IRCFG);
809 outw(nphyctl, iobase+VLSI_PIO_NPHYCTL);
810 wmb();
811 outw(IRENABLE_PHYANDCLOCK, iobase+VLSI_PIO_IRENABLE);
812 mb();
813
814 udelay(1); /* chip applies IRCFG on next rising edge of its 8MHz clock */
815
816 /* read back settings for validation */
817
818 config = inw(iobase+VLSI_PIO_IRENABLE) & IRENABLE_MASK;
819
820 if (mode == IFF_FIR)
821 config ^= IRENABLE_FIR_ON;
822 else if (mode == IFF_MIR)
823 config ^= (IRENABLE_MIR_ON|IRENABLE_CRC16_ON);
824 else
825 config ^= IRENABLE_SIR_ON;
826
827 if (config != (IRENABLE_PHYANDCLOCK|IRENABLE_ENRXST)) {
a97a6f10 828 IRDA_WARNING("%s: failed to set %s mode!\n", __func__,
1da177e4
LT		 829 (mode==IFF_SIR)?"SIR":((mode==IFF_MIR)?"MIR":"FIR"));
830 ret = -1;
831 }
832 else {
833 if (inw(iobase+VLSI_PIO_PHYCTL) != nphyctl) {
834 IRDA_WARNING("%s: failed to apply baudrate %d\n",
a97a6f10 835 __func__, baudrate);
1da177e4
LT		 836 ret = -1;
837 }
838 else {
839 idev->mode = mode;
840 idev->baud = baudrate;
841 idev->new_baud = 0;
842 ret = 0;
843 }
844 }
845
846 if (ret)
a97a6f10 847 vlsi_reg_debug(iobase,__func__);
1da177e4
LT		 848
849 return ret;
850}
851
6518bbb8
SH		 852static netdev_tx_t vlsi_hard_start_xmit(struct sk_buff *skb,
853 struct net_device *ndev)
1da177e4 854{
4cf1653a 855 vlsi_irda_dev_t *idev = netdev_priv(ndev);
1da177e4
LT		 856 struct vlsi_ring *r = idev->tx_ring;
857 struct ring_descr *rd;
858 unsigned long flags;
859 unsigned iobase = ndev->base_addr;
860 u8 status;
861 u16 config;
862 int mtt;
863 int len, speed;
864 struct timeval now, ready;
865 char *msg = NULL;
866
867 speed = irda_get_next_speed(skb);
868 spin_lock_irqsave(&idev->lock, flags);
869 if (speed != -1 && speed != idev->baud) {
870 netif_stop_queue(ndev);
871 idev->new_baud = speed;
872 status = RD_TX_CLRENTX; /* stop tx-ring after this frame */
873 }
874 else
875 status = 0;
876
877 if (skb->len == 0) {
878 /* handle zero packets - should be speed change */
879 if (status == 0) {
880 msg = "bogus zero-length packet";
881 goto drop_unlock;
882 }
883
884 /* due to the completely asynch tx operation we might have
885 * IrLAP racing with the hardware here, f.e. if the controller
886 * is just sending the last packet with current speed while
887 * the LAP is already switching the speed using synchronous
888 * len=0 packet. Immediate execution would lead to hw lockup
889 * requiring a powercycle to reset. Good candidate to trigger
890 * this is the final UA:RSP packet after receiving a DISC:CMD
891 * when getting the LAP down.
892 * Note that we are not protected by the queue_stop approach
893 * because the final UA:RSP arrives _without_ request to apply
894 * new-speed-after-this-packet - hence the driver doesn't know
895 * this was the last packet and doesn't stop the queue. So the
896 * forced switch to default speed from LAP gets through as fast
897 * as only some 10 usec later while the UA:RSP is still processed
898 * by the hardware and we would get screwed.
899 */
900
901 if (ring_first(idev->tx_ring) == NULL) {
902 /* no race - tx-ring already empty */
903 vlsi_set_baud(idev, iobase);
904 netif_wake_queue(ndev);
905 }
906 else
907 ;
908 /* keep the speed change pending like it would
909 * for any len>0 packet. tx completion interrupt
910 * will apply it when the tx ring becomes empty.
911 */
912 spin_unlock_irqrestore(&idev->lock, flags);
913 dev_kfree_skb_any(skb);
6ed10654 914 return NETDEV_TX_OK;
1da177e4
LT		 915 }
916
917 /* sanity checks - simply drop the packet */
918
919 rd = ring_last(r);
920 if (!rd) {
921 msg = "ring full, but queue wasn't stopped";
922 goto drop_unlock;
923 }
924
925 if (rd_is_active(rd)) {
926 msg = "entry still owned by hw";
927 goto drop_unlock;
928 }
929
930 if (!rd->buf) {
931 msg = "tx ring entry without pci buffer";
932 goto drop_unlock;
933 }
934
935 if (rd->skb) {
936 msg = "ring entry with old skb still attached";
937 goto drop_unlock;
938 }
939
940 /* no need for serialization or interrupt disable during mtt */
941 spin_unlock_irqrestore(&idev->lock, flags);
942
943 if ((mtt = irda_get_mtt(skb)) > 0) {
944
945 ready.tv_usec = idev->last_rx.tv_usec + mtt;
946 ready.tv_sec = idev->last_rx.tv_sec;
947 if (ready.tv_usec >= 1000000) {
948 ready.tv_usec -= 1000000;
949 ready.tv_sec++; /* IrLAP 1.1: mtt always < 1 sec */
950 }
951 for(;;) {
952 do_gettimeofday(&now);
8e95a202
JP		 953 if (now.tv_sec > ready.tv_sec ||
954 (now.tv_sec==ready.tv_sec && now.tv_usec>=ready.tv_usec))
1da177e4
LT		 955 break;
956 udelay(100);
932ff279 957 /* must not sleep here - called under netif_tx_lock! */
1da177e4
LT		 958 }
959 }
960
961 /* tx buffer already owned by CPU due to pci_dma_sync_single_for_cpu()
962 * after subsequent tx-completion
963 */
964
965 if (idev->mode == IFF_SIR) {
966 status |= RD_TX_DISCRC; /* no hw-crc creation */
967 len = async_wrap_skb(skb, rd->buf, r->len);
968
969 /* Some rare worst case situation in SIR mode might lead to
970 * potential buffer overflow. The wrapper detects this, returns
971 * with a shortened frame (without FCS/EOF) but doesn't provide
972 * any error indication about the invalid packet which we are
973 * going to transmit.
974 * Therefore we log if the buffer got filled to the point, where the
975 * wrapper would abort, i.e. when there are less than 5 bytes left to
976 * allow appending the FCS/EOF.
977 */
978
979 if (len >= r->len-5)
980 IRDA_WARNING("%s: possible buffer overflow with SIR wrapping!\n",
a97a6f10 981 __func__);
1da177e4
LT		 982 }
983 else {
984 /* hw deals with MIR/FIR mode wrapping */
985 status |= RD_TX_PULSE; /* send 2 us highspeed indication pulse */
986 len = skb->len;
987 if (len > r->len) {
988 msg = "frame exceeds tx buffer length";
989 goto drop;
990 }
991 else
d626f62b 992 skb_copy_from_linear_data(skb, rd->buf, len);
1da177e4
LT		 993 }
994
995 rd->skb = skb; /* remember skb for tx-complete stats */
996
997 rd_set_count(rd, len);
998 rd_set_status(rd, status); /* not yet active! */
999
1000 /* give dma buffer back to busmaster-hw (flush caches to make
1001 * CPU-driven changes visible from the pci bus).
1002 */
1003
1004 pci_dma_sync_single_for_device(r->pdev, rd_get_addr(rd), r->len, r->dir);
1005
1006/* Switching to TX mode here races with the controller
1007 * which may stop TX at any time when fetching an inactive descriptor
1008 * or one with CLR_ENTX set. So we switch on TX only, if TX was not running
1009 * _after_ the new descriptor was activated on the ring. This ensures
1010 * we will either find TX already stopped or we can be sure, there
1011 * will be a TX-complete interrupt even if the chip stopped doing
1012 * TX just after we found it still running. The ISR will then find
1013 * the non-empty ring and restart TX processing. The enclosing
1014 * spinlock provides the correct serialization to prevent race with isr.
1015 */
1016
1017 spin_lock_irqsave(&idev->lock,flags);
1018
1019 rd_activate(rd);
1020
1021 if (!(inw(iobase+VLSI_PIO_IRENABLE) & IRENABLE_ENTXST)) {
1022 int fifocnt;
1023
1024 fifocnt = inw(ndev->base_addr+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK;
1025 if (fifocnt != 0) {
a97a6f10 1026 IRDA_DEBUG(0, "%s: rx fifo not empty(%d)\n", __func__, fifocnt);
1da177e4
LT		 1027 }
1028
1029 config = inw(iobase+VLSI_PIO_IRCFG);
1030 mb();
1031 outw(config | IRCFG_ENTX, iobase+VLSI_PIO_IRCFG);
1032 wmb();
1033 outw(0, iobase+VLSI_PIO_PROMPT);
1034 }
1da177e4
LT		 1035
1036 if (ring_put(r) == NULL) {
1037 netif_stop_queue(ndev);
a97a6f10 1038 IRDA_DEBUG(3, "%s: tx ring full - queue stopped\n", __func__);
1da177e4
LT		 1039 }
1040 spin_unlock_irqrestore(&idev->lock, flags);
1041
6ed10654 1042 return NETDEV_TX_OK;
1da177e4
LT		 1043
1044drop_unlock:
1045 spin_unlock_irqrestore(&idev->lock, flags);
1046drop:
a97a6f10 1047 IRDA_WARNING("%s: dropping packet - %s\n", __func__, msg);
1da177e4 1048 dev_kfree_skb_any(skb);
af049081
SH		 1049 ndev->stats.tx_errors++;
1050 ndev->stats.tx_dropped++;
1da177e4
LT		 1051 /* Don't even think about returning NET_XMIT_DROP (=1) here!
1052 * In fact any retval!=0 causes the packet scheduler to requeue the
1053 * packet for later retry of transmission - which isn't exactly
1054 * what we want after we've just called dev_kfree_skb_any ;-)
1055 */
6ed10654 1056 return NETDEV_TX_OK;
1da177e4
LT		 1057}
1058
1059static void vlsi_tx_interrupt(struct net_device *ndev)
1060{
4cf1653a 1061 vlsi_irda_dev_t *idev = netdev_priv(ndev);
1da177e4
LT		 1062 struct vlsi_ring *r = idev->tx_ring;
1063 struct ring_descr *rd;
1064 unsigned iobase;
1065 int ret;
1066 u16 config;
1067
1068 for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) {
1069
1070 if (rd_is_active(rd))
1071 break;
1072
1073 ret = vlsi_process_tx(r, rd);
1074
1075 if (ret < 0) {
1076 ret = -ret;
af049081 1077 ndev->stats.tx_errors++;
1da177e4 1078 if (ret & VLSI_TX_DROP)
af049081 1079 ndev->stats.tx_dropped++;
1da177e4 1080 if (ret & VLSI_TX_FIFO)
af049081 1081 ndev->stats.tx_fifo_errors++;
1da177e4
LT		 1082 }
1083 else if (ret > 0){
af049081
SH		 1084 ndev->stats.tx_packets++;
1085 ndev->stats.tx_bytes += ret;
1da177e4
LT		 1086 }
1087 }
1088
1089 iobase = ndev->base_addr;
1090
1091 if (idev->new_baud && rd == NULL) /* tx ring empty and speed change pending */
1092 vlsi_set_baud(idev, iobase);
1093
1094 config = inw(iobase+VLSI_PIO_IRCFG);
1095 if (rd == NULL) /* tx ring empty: re-enable rx */
1096 outw((config & ~IRCFG_ENTX) | IRCFG_ENRX, iobase+VLSI_PIO_IRCFG);
1097
1098 else if (!(inw(iobase+VLSI_PIO_IRENABLE) & IRENABLE_ENTXST)) {
1099 int fifocnt;
1100
1101 fifocnt = inw(iobase+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK;
1102 if (fifocnt != 0) {
1103 IRDA_DEBUG(0, "%s: rx fifo not empty(%d)\n",
a97a6f10 1104 __func__, fifocnt);
1da177e4
LT		 1105 }
1106 outw(config | IRCFG_ENTX, iobase+VLSI_PIO_IRCFG);
1107 }
1108
1109 outw(0, iobase+VLSI_PIO_PROMPT);
1110
1111 if (netif_queue_stopped(ndev) && !idev->new_baud) {
1112 netif_wake_queue(ndev);
a97a6f10 1113 IRDA_DEBUG(3, "%s: queue awoken\n", __func__);
1da177e4
LT		 1114 }
1115}
1116
1117/* caller must have stopped the controller from busmastering */
1118
1119static void vlsi_unarm_tx(vlsi_irda_dev_t *idev)
1120{
af049081 1121 struct net_device *ndev = pci_get_drvdata(idev->pdev);
1da177e4
LT		 1122 struct vlsi_ring *r = idev->tx_ring;
1123 struct ring_descr *rd;
1124 int ret;
1125
1126 for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) {
1127
1128 ret = 0;
1129 if (rd_is_active(rd)) {
1130 rd_set_status(rd, 0);
1131 rd_set_count(rd, 0);
1132 pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir);
1133 if (rd->skb) {
1134 dev_kfree_skb_any(rd->skb);
1135 rd->skb = NULL;
1136 }
a97a6f10 1137 IRDA_DEBUG(0, "%s - dropping tx packet\n", __func__);
1da177e4
LT		 1138 ret = -VLSI_TX_DROP;
1139 }
1140 else
1141 ret = vlsi_process_tx(r, rd);
1142
1143 if (ret < 0) {
1144 ret = -ret;
af049081 1145 ndev->stats.tx_errors++;
1da177e4 1146 if (ret & VLSI_TX_DROP)
af049081 1147 ndev->stats.tx_dropped++;
1da177e4 1148 if (ret & VLSI_TX_FIFO)
af049081 1149 ndev->stats.tx_fifo_errors++;
1da177e4
LT		 1150 }
1151 else if (ret > 0){
af049081
SH		 1152 ndev->stats.tx_packets++;
1153 ndev->stats.tx_bytes += ret;
1da177e4
LT		 1154 }
1155 }
1156
1157}
1158
1159/********************************************************/
1160
1161static int vlsi_start_clock(struct pci_dev *pdev)
1162{
1163 u8 clkctl, lock;
1164 int i, count;
1165
1166 if (clksrc < 2) { /* auto or PLL: try PLL */
1167 clkctl = CLKCTL_PD_INV | CLKCTL_CLKSTP;
1168 pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl);
1169
1170 /* procedure to detect PLL lock synchronisation:
1171 * after 0.5 msec initial delay we expect to find 3 PLL lock
1172 * indications within 10 msec for successful PLL detection.
1173 */
1174 udelay(500);
1175 count = 0;
1176 for (i = 500; i <= 10000; i += 50) { /* max 10 msec */
1177 pci_read_config_byte(pdev, VLSI_PCI_CLKCTL, &lock);
1178 if (lock&CLKCTL_LOCK) {
1179 if (++count >= 3)
1180 break;
1181 }
1182 udelay(50);
1183 }
1184 if (count < 3) {
1185 if (clksrc == 1) { /* explicitly asked for PLL hence bail out */
1186 IRDA_ERROR("%s: no PLL or failed to lock!\n",
a97a6f10 1187 __func__);
1da177e4
LT		 1188 clkctl = CLKCTL_CLKSTP;
1189 pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl);
1190 return -1;
1191 }
1192 else /* was: clksrc=0(auto) */
1193 clksrc = 3; /* fallback to 40MHz XCLK (OB800) */
1194
1195 IRDA_DEBUG(0, "%s: PLL not locked, fallback to clksrc=%d\n",
a97a6f10 1196 __func__, clksrc);
1da177e4
LT		 1197 }
1198 else
1199 clksrc = 1; /* got successful PLL lock */
1200 }
1201
1202 if (clksrc != 1) {
1203 /* we get here if either no PLL detected in auto-mode or
1204 an external clock source was explicitly specified */
1205
1206 clkctl = CLKCTL_EXTCLK | CLKCTL_CLKSTP;
1207 if (clksrc == 3)
1208 clkctl |= CLKCTL_XCKSEL;
1209 pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl);
1210
1211 /* no way to test for working XCLK */
1212 }
1213 else
1214 pci_read_config_byte(pdev, VLSI_PCI_CLKCTL, &clkctl);
1215
1216 /* ok, now going to connect the chip with the clock source */
1217
1218 clkctl &= ~CLKCTL_CLKSTP;
1219 pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl);
1220
1221 return 0;
1222}
1223
1224static void vlsi_stop_clock(struct pci_dev *pdev)
1225{
1226 u8 clkctl;
1227
1228 /* disconnect chip from clock source */
1229 pci_read_config_byte(pdev, VLSI_PCI_CLKCTL, &clkctl);
1230 clkctl |= CLKCTL_CLKSTP;
1231 pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl);
1232
1233 /* disable all clock sources */
1234 clkctl &= ~(CLKCTL_EXTCLK | CLKCTL_PD_INV);
1235 pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl);
1236}
1237
1238/********************************************************/
1239
1240/* writing all-zero to the VLSI PCI IO register area seems to prevent
1241 * some occasional situations where the hardware fails (symptoms are
1242 * what appears as stalled tx/rx state machines, i.e. everything ok for
1243 * receive or transmit but hw makes no progress or is unable to access
1244 * the bus memory locations).
1245 * Best place to call this is immediately after/before the internal clock
1246 * gets started/stopped.
1247 */
1248
1249static inline void vlsi_clear_regs(unsigned iobase)
1250{
1251 unsigned i;
1252 const unsigned chip_io_extent = 32;
1253
1254 for (i = 0; i < chip_io_extent; i += sizeof(u16))
1255 outw(0, iobase + i);
1256}
1257
1258static int vlsi_init_chip(struct pci_dev *pdev)
1259{
1260 struct net_device *ndev = pci_get_drvdata(pdev);
4cf1653a 1261 vlsi_irda_dev_t *idev = netdev_priv(ndev);
1da177e4
LT		 1262 unsigned iobase;
1263 u16 ptr;
1264
1265 /* start the clock and clean the registers */
1266
1267 if (vlsi_start_clock(pdev)) {
a97a6f10 1268 IRDA_ERROR("%s: no valid clock source\n", __func__);
1da177e4
LT		 1269 return -1;
1270 }
1271 iobase = ndev->base_addr;
1272 vlsi_clear_regs(iobase);
1273
1274 outb(IRINTR_INT_MASK, iobase+VLSI_PIO_IRINTR); /* w/c pending IRQ, disable all INT */
1275
1276 outw(0, iobase+VLSI_PIO_IRENABLE); /* disable IrPHY-interface */
1277
1278 /* disable everything, particularly IRCFG_MSTR - (also resetting the RING_PTR) */
1279
1280 outw(0, iobase+VLSI_PIO_IRCFG);
1281 wmb();
1282
1283 outw(MAX_PACKET_LENGTH, iobase+VLSI_PIO_MAXPKT); /* max possible value=0x0fff */
1284
1285 outw(BUS_TO_RINGBASE(idev->busaddr), iobase+VLSI_PIO_RINGBASE);
1286
1287 outw(TX_RX_TO_RINGSIZE(idev->tx_ring->size, idev->rx_ring->size),
1288 iobase+VLSI_PIO_RINGSIZE);
1289
1290 ptr = inw(iobase+VLSI_PIO_RINGPTR);
1291 atomic_set(&idev->rx_ring->head, RINGPTR_GET_RX(ptr));
1292 atomic_set(&idev->rx_ring->tail, RINGPTR_GET_RX(ptr));
1293 atomic_set(&idev->tx_ring->head, RINGPTR_GET_TX(ptr));
1294 atomic_set(&idev->tx_ring->tail, RINGPTR_GET_TX(ptr));
1295
1296 vlsi_set_baud(idev, iobase); /* idev->new_baud used as provided by caller */
1297
1298 outb(IRINTR_INT_MASK, iobase+VLSI_PIO_IRINTR); /* just in case - w/c pending IRQ's */
1299 wmb();
1300
1301 /* DO NOT BLINDLY ENABLE IRINTR_ACTEN!
1302 * basically every received pulse fires an ACTIVITY-INT
1303 * leading to >>1000 INT's per second instead of few 10
1304 */
1305
1306 outb(IRINTR_RPKTEN|IRINTR_TPKTEN, iobase+VLSI_PIO_IRINTR);
1307
1308 return 0;
1309}
1310
1311static int vlsi_start_hw(vlsi_irda_dev_t *idev)
1312{
1313 struct pci_dev *pdev = idev->pdev;
1314 struct net_device *ndev = pci_get_drvdata(pdev);
1315 unsigned iobase = ndev->base_addr;
1316 u8 byte;
1317
1318 /* we don't use the legacy UART, disable its address decoding */
1319
1320 pci_read_config_byte(pdev, VLSI_PCI_IRMISC, &byte);
1321 byte &= ~(IRMISC_UARTEN | IRMISC_UARTTST);
1322 pci_write_config_byte(pdev, VLSI_PCI_IRMISC, byte);
1323
1324 /* enable PCI busmaster access to our 16MB page */
1325
1326 pci_write_config_byte(pdev, VLSI_PCI_MSTRPAGE, MSTRPAGE_VALUE);
1327 pci_set_master(pdev);
1328
1329 if (vlsi_init_chip(pdev) < 0) {
1330 pci_disable_device(pdev);
1331 return -1;
1332 }
1333
1334 vlsi_fill_rx(idev->rx_ring);
1335
1336 do_gettimeofday(&idev->last_rx); /* first mtt may start from now on */
1337
1338 outw(0, iobase+VLSI_PIO_PROMPT); /* kick hw state machine */
1339
1340 return 0;
1341}
1342
1343static int vlsi_stop_hw(vlsi_irda_dev_t *idev)
1344{
1345 struct pci_dev *pdev = idev->pdev;
1346 struct net_device *ndev = pci_get_drvdata(pdev);
1347 unsigned iobase = ndev->base_addr;
1348 unsigned long flags;
1349
1350 spin_lock_irqsave(&idev->lock,flags);
1351 outw(0, iobase+VLSI_PIO_IRENABLE);
1352 outw(0, iobase+VLSI_PIO_IRCFG); /* disable everything */
1353
1354 /* disable and w/c irqs */
1355 outb(0, iobase+VLSI_PIO_IRINTR);
1356 wmb();
1357 outb(IRINTR_INT_MASK, iobase+VLSI_PIO_IRINTR);
1358 spin_unlock_irqrestore(&idev->lock,flags);
1359
1360 vlsi_unarm_tx(idev);
1361 vlsi_unarm_rx(idev);
1362
1363 vlsi_clear_regs(iobase);
1364 vlsi_stop_clock(pdev);
1365
1366 pci_disable_device(pdev);
1367
1368 return 0;
1369}
1370
1371/**************************************************************/
1372
1da177e4
LT		 1373static void vlsi_tx_timeout(struct net_device *ndev)
1374{
4cf1653a 1375 vlsi_irda_dev_t *idev = netdev_priv(ndev);
1da177e4
LT		 1376
1377
a97a6f10 1378 vlsi_reg_debug(ndev->base_addr, __func__);
1da177e4
LT		 1379 vlsi_ring_debug(idev->tx_ring);
1380
1381 if (netif_running(ndev))
1382 netif_stop_queue(ndev);
1383
1384 vlsi_stop_hw(idev);
1385
1386 /* now simply restart the whole thing */
1387
1388 if (!idev->new_baud)
1389 idev->new_baud = idev->baud; /* keep current baudrate */
1390
1391 if (vlsi_start_hw(idev))
1392 IRDA_ERROR("%s: failed to restart hw - %s(%s) unusable!\n",
a97a6f10 1393 __func__, pci_name(idev->pdev), ndev->name);
1da177e4
LT		 1394 else
1395 netif_start_queue(ndev);
1396}
1397
1398static int vlsi_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd)
1399{
4cf1653a 1400 vlsi_irda_dev_t *idev = netdev_priv(ndev);
1da177e4
LT		 1401 struct if_irda_req *irq = (struct if_irda_req *) rq;
1402 unsigned long flags;
1403 u16 fifocnt;
1404 int ret = 0;
1405
1406 switch (cmd) {
1407 case SIOCSBANDWIDTH:
1408 if (!capable(CAP_NET_ADMIN)) {
1409 ret = -EPERM;
1410 break;
1411 }
1412 spin_lock_irqsave(&idev->lock, flags);
1413 idev->new_baud = irq->ifr_baudrate;
1414 /* when called from userland there might be a minor race window here
1415 * if the stack tries to change speed concurrently - which would be
1416 * pretty strange anyway with the userland having full control...
1417 */
1418 vlsi_set_baud(idev, ndev->base_addr);
1419 spin_unlock_irqrestore(&idev->lock, flags);
1420 break;
1421 case SIOCSMEDIABUSY:
1422 if (!capable(CAP_NET_ADMIN)) {
1423 ret = -EPERM;
1424 break;
1425 }
1426 irda_device_set_media_busy(ndev, TRUE);
1427 break;
1428 case SIOCGRECEIVING:
1429 /* the best we can do: check whether there are any bytes in rx fifo.
1430 * The trustable window (in case some data arrives just afterwards)
1431 * may be as short as 1usec or so at 4Mbps.
1432 */
1433 fifocnt = inw(ndev->base_addr+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK;
1434 irq->ifr_receiving = (fifocnt!=0) ? 1 : 0;
1435 break;
1436 default:
1437 IRDA_WARNING("%s: notsupp - cmd=%04x\n",
a97a6f10 1438 __func__, cmd);
1da177e4
LT		 1439 ret = -EOPNOTSUPP;
1440 }
1441
1442 return ret;
1443}
1444
1445/********************************************************/
1446
7d12e780 1447static irqreturn_t vlsi_interrupt(int irq, void *dev_instance)
1da177e4
LT		 1448{
1449 struct net_device *ndev = dev_instance;
4cf1653a 1450 vlsi_irda_dev_t *idev = netdev_priv(ndev);
1da177e4
LT		 1451 unsigned iobase;
1452 u8 irintr;
1453 int boguscount = 5;
1454 unsigned long flags;
1455 int handled = 0;
1456
1457 iobase = ndev->base_addr;
1458 spin_lock_irqsave(&idev->lock,flags);
1459 do {
1460 irintr = inb(iobase+VLSI_PIO_IRINTR);
1461 mb();
1462 outb(irintr, iobase+VLSI_PIO_IRINTR); /* acknowledge asap */
1463
1464 if (!(irintr&=IRINTR_INT_MASK)) /* not our INT - probably shared */
1465 break;
1466
1467 handled = 1;
1468
1469 if (unlikely(!(irintr & ~IRINTR_ACTIVITY)))
1470 break; /* nothing todo if only activity */
1471
1472 if (irintr&IRINTR_RPKTINT)
1473 vlsi_rx_interrupt(ndev);
1474
1475 if (irintr&IRINTR_TPKTINT)
1476 vlsi_tx_interrupt(ndev);
1477
1478 } while (--boguscount > 0);
1479 spin_unlock_irqrestore(&idev->lock,flags);
1480
1481 if (boguscount <= 0)
1482 IRDA_MESSAGE("%s: too much work in interrupt!\n",
a97a6f10 1483 __func__);
1da177e4
LT		 1484 return IRQ_RETVAL(handled);
1485}
1486
1487/********************************************************/
1488
1489static int vlsi_open(struct net_device *ndev)
1490{
4cf1653a 1491 vlsi_irda_dev_t *idev = netdev_priv(ndev);
1da177e4
LT		 1492 int err = -EAGAIN;
1493 char hwname[32];
1494
1495 if (pci_request_regions(idev->pdev, drivername)) {
a97a6f10 1496 IRDA_WARNING("%s: io resource busy\n", __func__);
1da177e4
LT		 1497 goto errout;
1498 }
1499 ndev->base_addr = pci_resource_start(idev->pdev,0);
1500 ndev->irq = idev->pdev->irq;
1501
1502 /* under some rare occasions the chip apparently comes up with
1503 * IRQ's pending. We better w/c pending IRQ and disable them all
1504 */
1505
1506 outb(IRINTR_INT_MASK, ndev->base_addr+VLSI_PIO_IRINTR);
1507
1fb9df5d 1508 if (request_irq(ndev->irq, vlsi_interrupt, IRQF_SHARED,
1da177e4
LT		 1509 drivername, ndev)) {
1510 IRDA_WARNING("%s: couldn't get IRQ: %d\n",
a97a6f10 1511 __func__, ndev->irq);
1da177e4
LT		 1512 goto errout_io;
1513 }
1514
1515 if ((err = vlsi_create_hwif(idev)) != 0)
1516 goto errout_irq;
1517
1518 sprintf(hwname, "VLSI-FIR @ 0x%04x", (unsigned)ndev->base_addr);
1519 idev->irlap = irlap_open(ndev,&idev->qos,hwname);
1520 if (!idev->irlap)
1521 goto errout_free_ring;
1522
1523 do_gettimeofday(&idev->last_rx); /* first mtt may start from now on */
1524
1525 idev->new_baud = 9600; /* start with IrPHY using 9600(SIR) mode */
1526
1527 if ((err = vlsi_start_hw(idev)) != 0)
1528 goto errout_close_irlap;
1529
1530 netif_start_queue(ndev);
1531
a97a6f10 1532 IRDA_MESSAGE("%s: device %s operational\n", __func__, ndev->name);
1da177e4
LT		 1533
1534 return 0;
1535
1536errout_close_irlap:
1537 irlap_close(idev->irlap);
1538errout_free_ring:
1539 vlsi_destroy_hwif(idev);
1540errout_irq:
1541 free_irq(ndev->irq,ndev);
1542errout_io:
1543 pci_release_regions(idev->pdev);
1544errout:
1545 return err;
1546}
1547
1548static int vlsi_close(struct net_device *ndev)
1549{
4cf1653a 1550 vlsi_irda_dev_t *idev = netdev_priv(ndev);
1da177e4
LT		 1551
1552 netif_stop_queue(ndev);
1553
1554 if (idev->irlap)
1555 irlap_close(idev->irlap);
1556 idev->irlap = NULL;
1557
1558 vlsi_stop_hw(idev);
1559
1560 vlsi_destroy_hwif(idev);
1561
1562 free_irq(ndev->irq,ndev);
1563
1564 pci_release_regions(idev->pdev);
1565
a97a6f10 1566 IRDA_MESSAGE("%s: device %s stopped\n", __func__, ndev->name);
1da177e4
LT		 1567
1568 return 0;
1569}
1570
30a5d7f7
SH		 1571static const struct net_device_ops vlsi_netdev_ops = {
1572 .ndo_open = vlsi_open,
1573 .ndo_stop = vlsi_close,
1574 .ndo_start_xmit = vlsi_hard_start_xmit,
1575 .ndo_do_ioctl = vlsi_ioctl,
1576 .ndo_tx_timeout = vlsi_tx_timeout,
1577};
1578
1da177e4
LT		 1579static int vlsi_irda_init(struct net_device *ndev)
1580{
4cf1653a 1581 vlsi_irda_dev_t *idev = netdev_priv(ndev);
1da177e4
LT		 1582 struct pci_dev *pdev = idev->pdev;
1583
1da177e4
LT		 1584 ndev->irq = pdev->irq;
1585 ndev->base_addr = pci_resource_start(pdev,0);
1586
1587 /* PCI busmastering
1588 * see include file for details why we need these 2 masks, in this order!
1589 */
1590
8e95a202
JP		 1591 if (pci_set_dma_mask(pdev,DMA_MASK_USED_BY_HW) ||
1592 pci_set_dma_mask(pdev,DMA_MASK_MSTRPAGE)) {
a97a6f10 1593 IRDA_ERROR("%s: aborting due to PCI BM-DMA address limitations\n", __func__);
1da177e4
LT		 1594 return -1;
1595 }
1596
1597 irda_init_max_qos_capabilies(&idev->qos);
1598
1599 /* the VLSI82C147 does not support 576000! */
1600
1601 idev->qos.baud_rate.bits = IR_2400 | IR_9600
1602 | IR_19200 | IR_38400 | IR_57600 | IR_115200
1603 | IR_1152000 | (IR_4000000 << 8);
1604
1605 idev->qos.min_turn_time.bits = qos_mtt_bits;
1606
1607 irda_qos_bits_to_value(&idev->qos);
1608
1609 /* currently no public media definitions for IrDA */
1610
1611 ndev->flags |= IFF_PORTSEL | IFF_AUTOMEDIA;
1612 ndev->if_port = IF_PORT_UNKNOWN;
1613
30a5d7f7 1614 ndev->netdev_ops = &vlsi_netdev_ops;
1da177e4
LT		 1615 ndev->watchdog_timeo = 500*HZ/1000; /* max. allowed turn time for IrLAP */
1616
1617 SET_NETDEV_DEV(ndev, &pdev->dev);
1618
1619 return 0;
1620}
1621
1622/**************************************************************/
1623
45ac936c 1624static int
1da177e4
LT		 1625vlsi_irda_probe(struct pci_dev *pdev, const struct pci_device_id *id)
1626{
1627 struct net_device *ndev;
1628 vlsi_irda_dev_t *idev;
1629
1630 if (pci_enable_device(pdev))
1631 goto out;
1632 else
1633 pdev->current_state = 0; /* hw must be running now */
1634
1635 IRDA_MESSAGE("%s: IrDA PCI controller %s detected\n",
778a43fd 1636 drivername, pci_name(pdev));
1da177e4 1637
8e95a202
JP		 1638 if ( !pci_resource_start(pdev,0) ||
1639 !(pci_resource_flags(pdev,0) & IORESOURCE_IO) ) {
a97a6f10 1640 IRDA_ERROR("%s: bar 0 invalid", __func__);
1da177e4
LT		 1641 goto out_disable;
1642 }
1643
1644 ndev = alloc_irdadev(sizeof(*idev));
1645 if (ndev==NULL) {
1646 IRDA_ERROR("%s: Unable to allocate device memory.\n",
a97a6f10 1647 __func__);
1da177e4
LT		 1648 goto out_disable;
1649 }
1650
4cf1653a 1651 idev = netdev_priv(ndev);
1da177e4
LT		 1652
1653 spin_lock_init(&idev->lock);
aa429110
MK		 1654 mutex_init(&idev->mtx);
1655 mutex_lock(&idev->mtx);
1da177e4
LT		 1656 idev->pdev = pdev;
1657
1658 if (vlsi_irda_init(ndev) < 0)
1659 goto out_freedev;
1660
1661 if (register_netdev(ndev) < 0) {
a97a6f10 1662 IRDA_ERROR("%s: register_netdev failed\n", __func__);
1da177e4
LT		 1663 goto out_freedev;
1664 }
1665
1666 if (vlsi_proc_root != NULL) {
1667 struct proc_dir_entry *ent;
1668
a95609cb
DL		 1669 ent = proc_create_data(ndev->name, S_IFREG|S_IRUGO,
1670 vlsi_proc_root, VLSI_PROC_FOPS, ndev);
1da177e4
LT		 1671 if (!ent) {
1672 IRDA_WARNING("%s: failed to create proc entry\n",
a97a6f10 1673 __func__);
1da177e4 1674 } else {
271a15ea 1675 proc_set_size(ent, 0);
1da177e4
LT		 1676 }
1677 idev->proc_entry = ent;
1678 }
1679 IRDA_MESSAGE("%s: registered device %s\n", drivername, ndev->name);
1680
1681 pci_set_drvdata(pdev, ndev);
aa429110 1682 mutex_unlock(&idev->mtx);
1da177e4
LT		 1683
1684 return 0;
1685
1686out_freedev:
aa429110 1687 mutex_unlock(&idev->mtx);
1da177e4
LT		 1688 free_netdev(ndev);
1689out_disable:
1690 pci_disable_device(pdev);
1691out:
1da177e4
LT		 1692 return -ENODEV;
1693}
1694
45ac936c 1695static void vlsi_irda_remove(struct pci_dev *pdev)
1da177e4
LT		 1696{
1697 struct net_device *ndev = pci_get_drvdata(pdev);
1698 vlsi_irda_dev_t *idev;
1699
1700 if (!ndev) {
1701 IRDA_ERROR("%s: lost netdevice?\n", drivername);
1702 return;
1703 }
1704
1705 unregister_netdev(ndev);
1706
4cf1653a 1707 idev = netdev_priv(ndev);
aa429110 1708 mutex_lock(&idev->mtx);
1da177e4
LT		 1709 if (idev->proc_entry) {
1710 remove_proc_entry(ndev->name, vlsi_proc_root);
1711 idev->proc_entry = NULL;
1712 }
aa429110 1713 mutex_unlock(&idev->mtx);
1da177e4
LT		 1714
1715 free_netdev(ndev);
1716
778a43fd 1717 IRDA_MESSAGE("%s: %s removed\n", drivername, pci_name(pdev));
1da177e4
LT		 1718}
1719
1720#ifdef CONFIG_PM
1721
1722/* The Controller doesn't provide PCI PM capabilities as defined by PCI specs.
1723 * Some of the Linux PCI-PM code however depends on this, for example in
1724 * pci_set_power_state(). So we have to take care to perform the required
1725 * operations on our own (particularly reflecting the pdev->current_state)
1726 * otherwise we might get cheated by pci-pm.
1727 */
1728
1729
05adc3b7 1730static int vlsi_irda_suspend(struct pci_dev *pdev, pm_message_t state)
1da177e4
LT		 1731{
1732 struct net_device *ndev = pci_get_drvdata(pdev);
1733 vlsi_irda_dev_t *idev;
1734
1da177e4 1735 if (!ndev) {
19299b34 1736 IRDA_ERROR("%s - %s: no netdevice\n",
a97a6f10 1737 __func__, pci_name(pdev));
1da177e4
LT		 1738 return 0;
1739 }
4cf1653a 1740 idev = netdev_priv(ndev);
aa429110 1741 mutex_lock(&idev->mtx);
1da177e4 1742 if (pdev->current_state != 0) { /* already suspended */
ca078bae
PM		 1743 if (state.event > pdev->current_state) { /* simply go deeper */
1744 pci_set_power_state(pdev, pci_choose_state(pdev, state));
1745 pdev->current_state = state.event;
1da177e4
LT		 1746 }
1747 else
a97a6f10 1748 IRDA_ERROR("%s - %s: invalid suspend request %u -> %u\n", __func__, pci_name(pdev), pdev->current_state, state.event);
aa429110 1749 mutex_unlock(&idev->mtx);
1da177e4
LT		 1750 return 0;
1751 }
1752
1753 if (netif_running(ndev)) {
1754 netif_device_detach(ndev);
1755 vlsi_stop_hw(idev);
1756 pci_save_state(pdev);
1757 if (!idev->new_baud)
1758 /* remember speed settings to restore on resume */
1759 idev->new_baud = idev->baud;
1760 }
1761
829ca9a3 1762 pci_set_power_state(pdev, pci_choose_state(pdev, state));
ca078bae 1763 pdev->current_state = state.event;
1da177e4 1764 idev->resume_ok = 1;
aa429110 1765 mutex_unlock(&idev->mtx);
1da177e4
LT		 1766 return 0;
1767}
1768
1769static int vlsi_irda_resume(struct pci_dev *pdev)
1770{
1771 struct net_device *ndev = pci_get_drvdata(pdev);
1772 vlsi_irda_dev_t *idev;
1773
1774 if (!ndev) {
19299b34 1775 IRDA_ERROR("%s - %s: no netdevice\n",
a97a6f10 1776 __func__, pci_name(pdev));
1da177e4
LT		 1777 return 0;
1778 }
4cf1653a 1779 idev = netdev_priv(ndev);
aa429110 1780 mutex_lock(&idev->mtx);
1da177e4 1781 if (pdev->current_state == 0) {
aa429110 1782 mutex_unlock(&idev->mtx);
1da177e4 1783 IRDA_WARNING("%s - %s: already resumed\n",
a97a6f10 1784 __func__, pci_name(pdev));
1da177e4
LT		 1785 return 0;
1786 }
1787
829ca9a3
PM		 1788 pci_set_power_state(pdev, PCI_D0);
1789 pdev->current_state = PM_EVENT_ON;
1da177e4
LT		 1790
1791 if (!idev->resume_ok) {
1792 /* should be obsolete now - but used to happen due to:
1793 * - pci layer initially setting pdev->current_state = 4 (unknown)
1794 * - pci layer did not walk the save_state-tree (might be APM problem)
1795 * so we could not refuse to suspend from undefined state
1796 * - vlsi_irda_suspend detected invalid state and refused to save
1797 * configuration for resume - but was too late to stop suspending
1798 * - vlsi_irda_resume got screwed when trying to resume from garbage
1799 *
1800 * now we explicitly set pdev->current_state = 0 after enabling the
1801 * device and independently resume_ok should catch any garbage config.
1802 */
a97a6f10 1803 IRDA_WARNING("%s - hm, nothing to resume?\n", __func__);
aa429110 1804 mutex_unlock(&idev->mtx);
1da177e4
LT		 1805 return 0;
1806 }
1807
1808 if (netif_running(ndev)) {
1809 pci_restore_state(pdev);
1810 vlsi_start_hw(idev);
1811 netif_device_attach(ndev);
1812 }
1813 idev->resume_ok = 0;
aa429110 1814 mutex_unlock(&idev->mtx);
1da177e4
LT		 1815 return 0;
1816}
1817
1818#endif /* CONFIG_PM */
1819
1820/*********************************************************/
1821
1822static struct pci_driver vlsi_irda_driver = {
1823 .name = drivername,
1824 .id_table = vlsi_irda_table,
1825 .probe = vlsi_irda_probe,
45ac936c 1826 .remove = vlsi_irda_remove,
1da177e4
LT		 1827#ifdef CONFIG_PM
1828 .suspend = vlsi_irda_suspend,
1829 .resume = vlsi_irda_resume,
1830#endif
1831};
1832
1833#define PROC_DIR ("driver/" DRIVER_NAME)
1834
1835static int __init vlsi_mod_init(void)
1836{
1837 int i, ret;
1838
1839 if (clksrc < 0 || clksrc > 3) {
1840 IRDA_ERROR("%s: invalid clksrc=%d\n", drivername, clksrc);
1841 return -1;
1842 }
1843
1844 for (i = 0; i < 2; i++) {
1845 switch(ringsize[i]) {
1846 case 4:
1847 case 8:
1848 case 16:
1849 case 32:
1850 case 64:
1851 break;
1852 default:
1853 IRDA_WARNING("%s: invalid %s ringsize %d, using default=8", drivername, (i)?"rx":"tx", ringsize[i]);
1854 ringsize[i] = 8;
1855 break;
1856 }
1857 }
1858
1859 sirpulse = !!sirpulse;
1860
66600221 1861 /* proc_mkdir returns NULL if !CONFIG_PROC_FS.
1da177e4
LT		 1862 * Failure to create the procfs entry is handled like running
1863 * without procfs - it's not required for the driver to work.
1864 */
66600221 1865 vlsi_proc_root = proc_mkdir(PROC_DIR, NULL);
1da177e4 1866
a85d771e 1867 ret = pci_register_driver(&vlsi_irda_driver);
1da177e4
LT		 1868
1869 if (ret && vlsi_proc_root)
1870 remove_proc_entry(PROC_DIR, NULL);
1871 return ret;
1872
1873}
1874
1875static void __exit vlsi_mod_exit(void)
1876{
1877 pci_unregister_driver(&vlsi_irda_driver);
1878 if (vlsi_proc_root)
1879 remove_proc_entry(PROC_DIR, NULL);
1880}
1881
1882module_init(vlsi_mod_init);
1883module_exit(vlsi_mod_exit);
Linux kernel - Deliverables
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