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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/config.h> | |
25 | #include <linux/module.h> | |
26 | ||
27 | #define DRIVER_NAME "vlsi_ir" | |
28 | #define DRIVER_VERSION "v0.5" | |
29 | #define DRIVER_DESCRIPTION "IrDA SIR/MIR/FIR driver for VLSI 82C147" | |
30 | #define DRIVER_AUTHOR "Martin Diehl <info@mdiehl.de>" | |
31 | ||
32 | MODULE_DESCRIPTION(DRIVER_DESCRIPTION); | |
33 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
34 | MODULE_LICENSE("GPL"); | |
35 | ||
36 | /********************************************************/ | |
37 | ||
38 | #include <linux/kernel.h> | |
39 | #include <linux/init.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/smp_lock.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 struct pci_device_id 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 | ||
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 | ||
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 | __FUNCTION__, r, r->size, r->mask, r->len, r->dir, r->rd[0].hw); | |
145 | printk(KERN_DEBUG "%s - head = %d / tail = %d\n", __FUNCTION__, | |
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: ", __FUNCTION__, 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 | __FUNCTION__, (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 | ||
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 | PCIDEV_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 | ||
180 | static void vlsi_proc_ndev(struct seq_file *seq, struct net_device *ndev) | |
181 | { | |
182 | vlsi_irda_dev_t *idev = ndev->priv; | |
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 | idev->stats.rx_packets, idev->stats.rx_bytes, idev->stats.rx_errors, | |
296 | idev->stats.rx_dropped); | |
297 | seq_printf(seq, " / overrun=%lu / length=%lu / frame=%lu / crc=%lu\n", | |
298 | idev->stats.rx_over_errors, idev->stats.rx_length_errors, | |
299 | idev->stats.rx_frame_errors, idev->stats.rx_crc_errors); | |
300 | seq_printf(seq, "TX: packets=%lu / bytes=%lu / errors=%lu / dropped=%lu / fifo=%lu\n", | |
301 | idev->stats.tx_packets, idev->stats.tx_bytes, idev->stats.tx_errors, | |
302 | idev->stats.tx_dropped, idev->stats.tx_fifo_errors); | |
303 | ||
304 | } | |
305 | ||
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 | ||
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 = ndev->priv; | |
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 | ||
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 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 | ||
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 | __FUNCTION__, 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 | ||
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 | if (rd->buf) | |
477 | kfree(rd->buf); | |
478 | } | |
479 | kfree(r); | |
480 | return 0; | |
481 | } | |
482 | ||
483 | static int vlsi_create_hwif(vlsi_irda_dev_t *idev) | |
484 | { | |
485 | char *ringarea; | |
486 | struct ring_descr_hw *hwmap; | |
487 | ||
488 | idev->virtaddr = NULL; | |
489 | idev->busaddr = 0; | |
490 | ||
491 | ringarea = pci_alloc_consistent(idev->pdev, HW_RING_AREA_SIZE, &idev->busaddr); | |
492 | if (!ringarea) { | |
493 | IRDA_ERROR("%s: insufficient memory for descriptor rings\n", | |
494 | __FUNCTION__); | |
495 | goto out; | |
496 | } | |
497 | memset(ringarea, 0, HW_RING_AREA_SIZE); | |
498 | ||
499 | hwmap = (struct ring_descr_hw *)ringarea; | |
500 | idev->rx_ring = vlsi_alloc_ring(idev->pdev, hwmap, ringsize[1], | |
501 | XFER_BUF_SIZE, PCI_DMA_FROMDEVICE); | |
502 | if (idev->rx_ring == NULL) | |
503 | goto out_unmap; | |
504 | ||
505 | hwmap += MAX_RING_DESCR; | |
506 | idev->tx_ring = vlsi_alloc_ring(idev->pdev, hwmap, ringsize[0], | |
507 | XFER_BUF_SIZE, PCI_DMA_TODEVICE); | |
508 | if (idev->tx_ring == NULL) | |
509 | goto out_free_rx; | |
510 | ||
511 | idev->virtaddr = ringarea; | |
512 | return 0; | |
513 | ||
514 | out_free_rx: | |
515 | vlsi_free_ring(idev->rx_ring); | |
516 | out_unmap: | |
517 | idev->rx_ring = idev->tx_ring = NULL; | |
518 | pci_free_consistent(idev->pdev, HW_RING_AREA_SIZE, ringarea, idev->busaddr); | |
519 | idev->busaddr = 0; | |
520 | out: | |
521 | return -ENOMEM; | |
522 | } | |
523 | ||
524 | static int vlsi_destroy_hwif(vlsi_irda_dev_t *idev) | |
525 | { | |
526 | vlsi_free_ring(idev->rx_ring); | |
527 | vlsi_free_ring(idev->tx_ring); | |
528 | idev->rx_ring = idev->tx_ring = NULL; | |
529 | ||
530 | if (idev->busaddr) | |
531 | pci_free_consistent(idev->pdev,HW_RING_AREA_SIZE,idev->virtaddr,idev->busaddr); | |
532 | ||
533 | idev->virtaddr = NULL; | |
534 | idev->busaddr = 0; | |
535 | ||
536 | return 0; | |
537 | } | |
538 | ||
539 | /********************************************************/ | |
540 | ||
541 | static int vlsi_process_rx(struct vlsi_ring *r, struct ring_descr *rd) | |
542 | { | |
543 | u16 status; | |
544 | int crclen, len = 0; | |
545 | struct sk_buff *skb; | |
546 | int ret = 0; | |
547 | struct net_device *ndev = (struct net_device *)pci_get_drvdata(r->pdev); | |
548 | vlsi_irda_dev_t *idev = ndev->priv; | |
549 | ||
550 | pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir); | |
551 | /* dma buffer now owned by the CPU */ | |
552 | status = rd_get_status(rd); | |
553 | if (status & RD_RX_ERROR) { | |
554 | if (status & RD_RX_OVER) | |
555 | ret |= VLSI_RX_OVER; | |
556 | if (status & RD_RX_LENGTH) | |
557 | ret |= VLSI_RX_LENGTH; | |
558 | if (status & RD_RX_PHYERR) | |
559 | ret |= VLSI_RX_FRAME; | |
560 | if (status & RD_RX_CRCERR) | |
561 | ret |= VLSI_RX_CRC; | |
562 | goto done; | |
563 | } | |
564 | ||
565 | len = rd_get_count(rd); | |
566 | crclen = (idev->mode==IFF_FIR) ? sizeof(u32) : sizeof(u16); | |
567 | len -= crclen; /* remove trailing CRC */ | |
568 | if (len <= 0) { | |
569 | IRDA_DEBUG(0, "%s: strange frame (len=%d)\n", __FUNCTION__, len); | |
570 | ret |= VLSI_RX_DROP; | |
571 | goto done; | |
572 | } | |
573 | ||
574 | if (idev->mode == IFF_SIR) { /* hw checks CRC in MIR, FIR mode */ | |
575 | ||
576 | /* rd->buf is a streaming PCI_DMA_FROMDEVICE map. Doing the | |
577 | * endian-adjustment there just in place will dirty a cache line | |
578 | * which belongs to the map and thus we must be sure it will | |
579 | * get flushed before giving the buffer back to hardware. | |
580 | * vlsi_fill_rx() will do this anyway - but here we rely on. | |
581 | */ | |
582 | le16_to_cpus(rd->buf+len); | |
583 | if (irda_calc_crc16(INIT_FCS,rd->buf,len+crclen) != GOOD_FCS) { | |
584 | IRDA_DEBUG(0, "%s: crc error\n", __FUNCTION__); | |
585 | ret |= VLSI_RX_CRC; | |
586 | goto done; | |
587 | } | |
588 | } | |
589 | ||
590 | if (!rd->skb) { | |
591 | IRDA_WARNING("%s: rx packet lost\n", __FUNCTION__); | |
592 | ret |= VLSI_RX_DROP; | |
593 | goto done; | |
594 | } | |
595 | ||
596 | skb = rd->skb; | |
597 | rd->skb = NULL; | |
598 | skb->dev = ndev; | |
599 | memcpy(skb_put(skb,len), rd->buf, len); | |
600 | skb->mac.raw = skb->data; | |
601 | if (in_interrupt()) | |
602 | netif_rx(skb); | |
603 | else | |
604 | netif_rx_ni(skb); | |
605 | ndev->last_rx = jiffies; | |
606 | ||
607 | done: | |
608 | rd_set_status(rd, 0); | |
609 | rd_set_count(rd, 0); | |
610 | /* buffer still owned by CPU */ | |
611 | ||
612 | return (ret) ? -ret : len; | |
613 | } | |
614 | ||
615 | static void vlsi_fill_rx(struct vlsi_ring *r) | |
616 | { | |
617 | struct ring_descr *rd; | |
618 | ||
619 | for (rd = ring_last(r); rd != NULL; rd = ring_put(r)) { | |
620 | if (rd_is_active(rd)) { | |
621 | IRDA_WARNING("%s: driver bug: rx descr race with hw\n", | |
622 | __FUNCTION__); | |
623 | vlsi_ring_debug(r); | |
624 | break; | |
625 | } | |
626 | if (!rd->skb) { | |
627 | rd->skb = dev_alloc_skb(IRLAP_SKB_ALLOCSIZE); | |
628 | if (rd->skb) { | |
629 | skb_reserve(rd->skb,1); | |
630 | rd->skb->protocol = htons(ETH_P_IRDA); | |
631 | } | |
632 | else | |
633 | break; /* probably not worth logging? */ | |
634 | } | |
635 | /* give dma buffer back to busmaster */ | |
636 | pci_dma_sync_single_for_device(r->pdev, rd_get_addr(rd), r->len, r->dir); | |
637 | rd_activate(rd); | |
638 | } | |
639 | } | |
640 | ||
641 | static void vlsi_rx_interrupt(struct net_device *ndev) | |
642 | { | |
643 | vlsi_irda_dev_t *idev = ndev->priv; | |
644 | struct vlsi_ring *r = idev->rx_ring; | |
645 | struct ring_descr *rd; | |
646 | int ret; | |
647 | ||
648 | for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) { | |
649 | ||
650 | if (rd_is_active(rd)) | |
651 | break; | |
652 | ||
653 | ret = vlsi_process_rx(r, rd); | |
654 | ||
655 | if (ret < 0) { | |
656 | ret = -ret; | |
657 | idev->stats.rx_errors++; | |
658 | if (ret & VLSI_RX_DROP) | |
659 | idev->stats.rx_dropped++; | |
660 | if (ret & VLSI_RX_OVER) | |
661 | idev->stats.rx_over_errors++; | |
662 | if (ret & VLSI_RX_LENGTH) | |
663 | idev->stats.rx_length_errors++; | |
664 | if (ret & VLSI_RX_FRAME) | |
665 | idev->stats.rx_frame_errors++; | |
666 | if (ret & VLSI_RX_CRC) | |
667 | idev->stats.rx_crc_errors++; | |
668 | } | |
669 | else if (ret > 0) { | |
670 | idev->stats.rx_packets++; | |
671 | idev->stats.rx_bytes += ret; | |
672 | } | |
673 | } | |
674 | ||
675 | do_gettimeofday(&idev->last_rx); /* remember "now" for later mtt delay */ | |
676 | ||
677 | vlsi_fill_rx(r); | |
678 | ||
679 | if (ring_first(r) == NULL) { | |
680 | /* we are in big trouble, if this should ever happen */ | |
681 | IRDA_ERROR("%s: rx ring exhausted!\n", __FUNCTION__); | |
682 | vlsi_ring_debug(r); | |
683 | } | |
684 | else | |
685 | outw(0, ndev->base_addr+VLSI_PIO_PROMPT); | |
686 | } | |
687 | ||
688 | /* caller must have stopped the controller from busmastering */ | |
689 | ||
690 | static void vlsi_unarm_rx(vlsi_irda_dev_t *idev) | |
691 | { | |
692 | struct vlsi_ring *r = idev->rx_ring; | |
693 | struct ring_descr *rd; | |
694 | int ret; | |
695 | ||
696 | for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) { | |
697 | ||
698 | ret = 0; | |
699 | if (rd_is_active(rd)) { | |
700 | rd_set_status(rd, 0); | |
701 | if (rd_get_count(rd)) { | |
702 | IRDA_DEBUG(0, "%s - dropping rx packet\n", __FUNCTION__); | |
703 | ret = -VLSI_RX_DROP; | |
704 | } | |
705 | rd_set_count(rd, 0); | |
706 | pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir); | |
707 | if (rd->skb) { | |
708 | dev_kfree_skb_any(rd->skb); | |
709 | rd->skb = NULL; | |
710 | } | |
711 | } | |
712 | else | |
713 | ret = vlsi_process_rx(r, rd); | |
714 | ||
715 | if (ret < 0) { | |
716 | ret = -ret; | |
717 | idev->stats.rx_errors++; | |
718 | if (ret & VLSI_RX_DROP) | |
719 | idev->stats.rx_dropped++; | |
720 | if (ret & VLSI_RX_OVER) | |
721 | idev->stats.rx_over_errors++; | |
722 | if (ret & VLSI_RX_LENGTH) | |
723 | idev->stats.rx_length_errors++; | |
724 | if (ret & VLSI_RX_FRAME) | |
725 | idev->stats.rx_frame_errors++; | |
726 | if (ret & VLSI_RX_CRC) | |
727 | idev->stats.rx_crc_errors++; | |
728 | } | |
729 | else if (ret > 0) { | |
730 | idev->stats.rx_packets++; | |
731 | idev->stats.rx_bytes += ret; | |
732 | } | |
733 | } | |
734 | } | |
735 | ||
736 | /********************************************************/ | |
737 | ||
738 | static int vlsi_process_tx(struct vlsi_ring *r, struct ring_descr *rd) | |
739 | { | |
740 | u16 status; | |
741 | int len; | |
742 | int ret; | |
743 | ||
744 | pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir); | |
745 | /* dma buffer now owned by the CPU */ | |
746 | status = rd_get_status(rd); | |
747 | if (status & RD_TX_UNDRN) | |
748 | ret = VLSI_TX_FIFO; | |
749 | else | |
750 | ret = 0; | |
751 | rd_set_status(rd, 0); | |
752 | ||
753 | if (rd->skb) { | |
754 | len = rd->skb->len; | |
755 | dev_kfree_skb_any(rd->skb); | |
756 | rd->skb = NULL; | |
757 | } | |
758 | else /* tx-skb already freed? - should never happen */ | |
759 | len = rd_get_count(rd); /* incorrect for SIR! (due to wrapping) */ | |
760 | ||
761 | rd_set_count(rd, 0); | |
762 | /* dma buffer still owned by the CPU */ | |
763 | ||
764 | return (ret) ? -ret : len; | |
765 | } | |
766 | ||
767 | static int vlsi_set_baud(vlsi_irda_dev_t *idev, unsigned iobase) | |
768 | { | |
769 | u16 nphyctl; | |
770 | u16 config; | |
771 | unsigned mode; | |
772 | int ret; | |
773 | int baudrate; | |
774 | int fifocnt; | |
775 | ||
776 | baudrate = idev->new_baud; | |
777 | IRDA_DEBUG(2, "%s: %d -> %d\n", __FUNCTION__, idev->baud, idev->new_baud); | |
778 | if (baudrate == 4000000) { | |
779 | mode = IFF_FIR; | |
780 | config = IRCFG_FIR; | |
781 | nphyctl = PHYCTL_FIR; | |
782 | } | |
783 | else if (baudrate == 1152000) { | |
784 | mode = IFF_MIR; | |
785 | config = IRCFG_MIR | IRCFG_CRC16; | |
786 | nphyctl = PHYCTL_MIR(clksrc==3); | |
787 | } | |
788 | else { | |
789 | mode = IFF_SIR; | |
790 | config = IRCFG_SIR | IRCFG_SIRFILT | IRCFG_RXANY; | |
791 | switch(baudrate) { | |
792 | default: | |
793 | IRDA_WARNING("%s: undefined baudrate %d - fallback to 9600!\n", | |
794 | __FUNCTION__, baudrate); | |
795 | baudrate = 9600; | |
796 | /* fallthru */ | |
797 | case 2400: | |
798 | case 9600: | |
799 | case 19200: | |
800 | case 38400: | |
801 | case 57600: | |
802 | case 115200: | |
803 | nphyctl = PHYCTL_SIR(baudrate,sirpulse,clksrc==3); | |
804 | break; | |
805 | } | |
806 | } | |
807 | config |= IRCFG_MSTR | IRCFG_ENRX; | |
808 | ||
809 | fifocnt = inw(iobase+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK; | |
810 | if (fifocnt != 0) { | |
811 | IRDA_DEBUG(0, "%s: rx fifo not empty(%d)\n", __FUNCTION__, fifocnt); | |
812 | } | |
813 | ||
814 | outw(0, iobase+VLSI_PIO_IRENABLE); | |
815 | outw(config, iobase+VLSI_PIO_IRCFG); | |
816 | outw(nphyctl, iobase+VLSI_PIO_NPHYCTL); | |
817 | wmb(); | |
818 | outw(IRENABLE_PHYANDCLOCK, iobase+VLSI_PIO_IRENABLE); | |
819 | mb(); | |
820 | ||
821 | udelay(1); /* chip applies IRCFG on next rising edge of its 8MHz clock */ | |
822 | ||
823 | /* read back settings for validation */ | |
824 | ||
825 | config = inw(iobase+VLSI_PIO_IRENABLE) & IRENABLE_MASK; | |
826 | ||
827 | if (mode == IFF_FIR) | |
828 | config ^= IRENABLE_FIR_ON; | |
829 | else if (mode == IFF_MIR) | |
830 | config ^= (IRENABLE_MIR_ON|IRENABLE_CRC16_ON); | |
831 | else | |
832 | config ^= IRENABLE_SIR_ON; | |
833 | ||
834 | if (config != (IRENABLE_PHYANDCLOCK|IRENABLE_ENRXST)) { | |
835 | IRDA_WARNING("%s: failed to set %s mode!\n", __FUNCTION__, | |
836 | (mode==IFF_SIR)?"SIR":((mode==IFF_MIR)?"MIR":"FIR")); | |
837 | ret = -1; | |
838 | } | |
839 | else { | |
840 | if (inw(iobase+VLSI_PIO_PHYCTL) != nphyctl) { | |
841 | IRDA_WARNING("%s: failed to apply baudrate %d\n", | |
842 | __FUNCTION__, baudrate); | |
843 | ret = -1; | |
844 | } | |
845 | else { | |
846 | idev->mode = mode; | |
847 | idev->baud = baudrate; | |
848 | idev->new_baud = 0; | |
849 | ret = 0; | |
850 | } | |
851 | } | |
852 | ||
853 | if (ret) | |
854 | vlsi_reg_debug(iobase,__FUNCTION__); | |
855 | ||
856 | return ret; | |
857 | } | |
858 | ||
859 | static int vlsi_hard_start_xmit(struct sk_buff *skb, struct net_device *ndev) | |
860 | { | |
861 | vlsi_irda_dev_t *idev = ndev->priv; | |
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 0; | |
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 - we are called under xmit_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 | __FUNCTION__); | |
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 | memcpy(rd->buf, skb->data, 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", __FUNCTION__, 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 | ndev->trans_start = jiffies; | |
1042 | ||
1043 | if (ring_put(r) == NULL) { | |
1044 | netif_stop_queue(ndev); | |
1045 | IRDA_DEBUG(3, "%s: tx ring full - queue stopped\n", __FUNCTION__); | |
1046 | } | |
1047 | spin_unlock_irqrestore(&idev->lock, flags); | |
1048 | ||
1049 | return 0; | |
1050 | ||
1051 | drop_unlock: | |
1052 | spin_unlock_irqrestore(&idev->lock, flags); | |
1053 | drop: | |
1054 | IRDA_WARNING("%s: dropping packet - %s\n", __FUNCTION__, msg); | |
1055 | dev_kfree_skb_any(skb); | |
1056 | idev->stats.tx_errors++; | |
1057 | idev->stats.tx_dropped++; | |
1058 | /* Don't even think about returning NET_XMIT_DROP (=1) here! | |
1059 | * In fact any retval!=0 causes the packet scheduler to requeue the | |
1060 | * packet for later retry of transmission - which isn't exactly | |
1061 | * what we want after we've just called dev_kfree_skb_any ;-) | |
1062 | */ | |
1063 | return 0; | |
1064 | } | |
1065 | ||
1066 | static void vlsi_tx_interrupt(struct net_device *ndev) | |
1067 | { | |
1068 | vlsi_irda_dev_t *idev = ndev->priv; | |
1069 | struct vlsi_ring *r = idev->tx_ring; | |
1070 | struct ring_descr *rd; | |
1071 | unsigned iobase; | |
1072 | int ret; | |
1073 | u16 config; | |
1074 | ||
1075 | for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) { | |
1076 | ||
1077 | if (rd_is_active(rd)) | |
1078 | break; | |
1079 | ||
1080 | ret = vlsi_process_tx(r, rd); | |
1081 | ||
1082 | if (ret < 0) { | |
1083 | ret = -ret; | |
1084 | idev->stats.tx_errors++; | |
1085 | if (ret & VLSI_TX_DROP) | |
1086 | idev->stats.tx_dropped++; | |
1087 | if (ret & VLSI_TX_FIFO) | |
1088 | idev->stats.tx_fifo_errors++; | |
1089 | } | |
1090 | else if (ret > 0){ | |
1091 | idev->stats.tx_packets++; | |
1092 | idev->stats.tx_bytes += ret; | |
1093 | } | |
1094 | } | |
1095 | ||
1096 | iobase = ndev->base_addr; | |
1097 | ||
1098 | if (idev->new_baud && rd == NULL) /* tx ring empty and speed change pending */ | |
1099 | vlsi_set_baud(idev, iobase); | |
1100 | ||
1101 | config = inw(iobase+VLSI_PIO_IRCFG); | |
1102 | if (rd == NULL) /* tx ring empty: re-enable rx */ | |
1103 | outw((config & ~IRCFG_ENTX) | IRCFG_ENRX, iobase+VLSI_PIO_IRCFG); | |
1104 | ||
1105 | else if (!(inw(iobase+VLSI_PIO_IRENABLE) & IRENABLE_ENTXST)) { | |
1106 | int fifocnt; | |
1107 | ||
1108 | fifocnt = inw(iobase+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK; | |
1109 | if (fifocnt != 0) { | |
1110 | IRDA_DEBUG(0, "%s: rx fifo not empty(%d)\n", | |
1111 | __FUNCTION__, fifocnt); | |
1112 | } | |
1113 | outw(config | IRCFG_ENTX, iobase+VLSI_PIO_IRCFG); | |
1114 | } | |
1115 | ||
1116 | outw(0, iobase+VLSI_PIO_PROMPT); | |
1117 | ||
1118 | if (netif_queue_stopped(ndev) && !idev->new_baud) { | |
1119 | netif_wake_queue(ndev); | |
1120 | IRDA_DEBUG(3, "%s: queue awoken\n", __FUNCTION__); | |
1121 | } | |
1122 | } | |
1123 | ||
1124 | /* caller must have stopped the controller from busmastering */ | |
1125 | ||
1126 | static void vlsi_unarm_tx(vlsi_irda_dev_t *idev) | |
1127 | { | |
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", __FUNCTION__); | |
1144 | ret = -VLSI_TX_DROP; | |
1145 | } | |
1146 | else | |
1147 | ret = vlsi_process_tx(r, rd); | |
1148 | ||
1149 | if (ret < 0) { | |
1150 | ret = -ret; | |
1151 | idev->stats.tx_errors++; | |
1152 | if (ret & VLSI_TX_DROP) | |
1153 | idev->stats.tx_dropped++; | |
1154 | if (ret & VLSI_TX_FIFO) | |
1155 | idev->stats.tx_fifo_errors++; | |
1156 | } | |
1157 | else if (ret > 0){ | |
1158 | idev->stats.tx_packets++; | |
1159 | idev->stats.tx_bytes += ret; | |
1160 | } | |
1161 | } | |
1162 | ||
1163 | } | |
1164 | ||
1165 | /********************************************************/ | |
1166 | ||
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 | __FUNCTION__); | |
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 | __FUNCTION__, 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 | ||
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 | ||
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 | ||
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 = ndev->priv; | |
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", __FUNCTION__); | |
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 | ||
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 | ||
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 | ||
1379 | static struct net_device_stats * vlsi_get_stats(struct net_device *ndev) | |
1380 | { | |
1381 | vlsi_irda_dev_t *idev = ndev->priv; | |
1382 | ||
1383 | return &idev->stats; | |
1384 | } | |
1385 | ||
1386 | static void vlsi_tx_timeout(struct net_device *ndev) | |
1387 | { | |
1388 | vlsi_irda_dev_t *idev = ndev->priv; | |
1389 | ||
1390 | ||
1391 | vlsi_reg_debug(ndev->base_addr, __FUNCTION__); | |
1392 | vlsi_ring_debug(idev->tx_ring); | |
1393 | ||
1394 | if (netif_running(ndev)) | |
1395 | netif_stop_queue(ndev); | |
1396 | ||
1397 | vlsi_stop_hw(idev); | |
1398 | ||
1399 | /* now simply restart the whole thing */ | |
1400 | ||
1401 | if (!idev->new_baud) | |
1402 | idev->new_baud = idev->baud; /* keep current baudrate */ | |
1403 | ||
1404 | if (vlsi_start_hw(idev)) | |
1405 | IRDA_ERROR("%s: failed to restart hw - %s(%s) unusable!\n", | |
1406 | __FUNCTION__, PCIDEV_NAME(idev->pdev), ndev->name); | |
1407 | else | |
1408 | netif_start_queue(ndev); | |
1409 | } | |
1410 | ||
1411 | static int vlsi_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd) | |
1412 | { | |
1413 | vlsi_irda_dev_t *idev = ndev->priv; | |
1414 | struct if_irda_req *irq = (struct if_irda_req *) rq; | |
1415 | unsigned long flags; | |
1416 | u16 fifocnt; | |
1417 | int ret = 0; | |
1418 | ||
1419 | switch (cmd) { | |
1420 | case SIOCSBANDWIDTH: | |
1421 | if (!capable(CAP_NET_ADMIN)) { | |
1422 | ret = -EPERM; | |
1423 | break; | |
1424 | } | |
1425 | spin_lock_irqsave(&idev->lock, flags); | |
1426 | idev->new_baud = irq->ifr_baudrate; | |
1427 | /* when called from userland there might be a minor race window here | |
1428 | * if the stack tries to change speed concurrently - which would be | |
1429 | * pretty strange anyway with the userland having full control... | |
1430 | */ | |
1431 | vlsi_set_baud(idev, ndev->base_addr); | |
1432 | spin_unlock_irqrestore(&idev->lock, flags); | |
1433 | break; | |
1434 | case SIOCSMEDIABUSY: | |
1435 | if (!capable(CAP_NET_ADMIN)) { | |
1436 | ret = -EPERM; | |
1437 | break; | |
1438 | } | |
1439 | irda_device_set_media_busy(ndev, TRUE); | |
1440 | break; | |
1441 | case SIOCGRECEIVING: | |
1442 | /* the best we can do: check whether there are any bytes in rx fifo. | |
1443 | * The trustable window (in case some data arrives just afterwards) | |
1444 | * may be as short as 1usec or so at 4Mbps. | |
1445 | */ | |
1446 | fifocnt = inw(ndev->base_addr+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK; | |
1447 | irq->ifr_receiving = (fifocnt!=0) ? 1 : 0; | |
1448 | break; | |
1449 | default: | |
1450 | IRDA_WARNING("%s: notsupp - cmd=%04x\n", | |
1451 | __FUNCTION__, cmd); | |
1452 | ret = -EOPNOTSUPP; | |
1453 | } | |
1454 | ||
1455 | return ret; | |
1456 | } | |
1457 | ||
1458 | /********************************************************/ | |
1459 | ||
1460 | static irqreturn_t vlsi_interrupt(int irq, void *dev_instance, | |
1461 | struct pt_regs *regs) | |
1462 | { | |
1463 | struct net_device *ndev = dev_instance; | |
1464 | vlsi_irda_dev_t *idev = ndev->priv; | |
1465 | unsigned iobase; | |
1466 | u8 irintr; | |
1467 | int boguscount = 5; | |
1468 | unsigned long flags; | |
1469 | int handled = 0; | |
1470 | ||
1471 | iobase = ndev->base_addr; | |
1472 | spin_lock_irqsave(&idev->lock,flags); | |
1473 | do { | |
1474 | irintr = inb(iobase+VLSI_PIO_IRINTR); | |
1475 | mb(); | |
1476 | outb(irintr, iobase+VLSI_PIO_IRINTR); /* acknowledge asap */ | |
1477 | ||
1478 | if (!(irintr&=IRINTR_INT_MASK)) /* not our INT - probably shared */ | |
1479 | break; | |
1480 | ||
1481 | handled = 1; | |
1482 | ||
1483 | if (unlikely(!(irintr & ~IRINTR_ACTIVITY))) | |
1484 | break; /* nothing todo if only activity */ | |
1485 | ||
1486 | if (irintr&IRINTR_RPKTINT) | |
1487 | vlsi_rx_interrupt(ndev); | |
1488 | ||
1489 | if (irintr&IRINTR_TPKTINT) | |
1490 | vlsi_tx_interrupt(ndev); | |
1491 | ||
1492 | } while (--boguscount > 0); | |
1493 | spin_unlock_irqrestore(&idev->lock,flags); | |
1494 | ||
1495 | if (boguscount <= 0) | |
1496 | IRDA_MESSAGE("%s: too much work in interrupt!\n", | |
1497 | __FUNCTION__); | |
1498 | return IRQ_RETVAL(handled); | |
1499 | } | |
1500 | ||
1501 | /********************************************************/ | |
1502 | ||
1503 | static int vlsi_open(struct net_device *ndev) | |
1504 | { | |
1505 | vlsi_irda_dev_t *idev = ndev->priv; | |
1506 | int err = -EAGAIN; | |
1507 | char hwname[32]; | |
1508 | ||
1509 | if (pci_request_regions(idev->pdev, drivername)) { | |
1510 | IRDA_WARNING("%s: io resource busy\n", __FUNCTION__); | |
1511 | goto errout; | |
1512 | } | |
1513 | ndev->base_addr = pci_resource_start(idev->pdev,0); | |
1514 | ndev->irq = idev->pdev->irq; | |
1515 | ||
1516 | /* under some rare occasions the chip apparently comes up with | |
1517 | * IRQ's pending. We better w/c pending IRQ and disable them all | |
1518 | */ | |
1519 | ||
1520 | outb(IRINTR_INT_MASK, ndev->base_addr+VLSI_PIO_IRINTR); | |
1521 | ||
1522 | if (request_irq(ndev->irq, vlsi_interrupt, SA_SHIRQ, | |
1523 | drivername, ndev)) { | |
1524 | IRDA_WARNING("%s: couldn't get IRQ: %d\n", | |
1525 | __FUNCTION__, ndev->irq); | |
1526 | goto errout_io; | |
1527 | } | |
1528 | ||
1529 | if ((err = vlsi_create_hwif(idev)) != 0) | |
1530 | goto errout_irq; | |
1531 | ||
1532 | sprintf(hwname, "VLSI-FIR @ 0x%04x", (unsigned)ndev->base_addr); | |
1533 | idev->irlap = irlap_open(ndev,&idev->qos,hwname); | |
1534 | if (!idev->irlap) | |
1535 | goto errout_free_ring; | |
1536 | ||
1537 | do_gettimeofday(&idev->last_rx); /* first mtt may start from now on */ | |
1538 | ||
1539 | idev->new_baud = 9600; /* start with IrPHY using 9600(SIR) mode */ | |
1540 | ||
1541 | if ((err = vlsi_start_hw(idev)) != 0) | |
1542 | goto errout_close_irlap; | |
1543 | ||
1544 | netif_start_queue(ndev); | |
1545 | ||
1546 | IRDA_MESSAGE("%s: device %s operational\n", __FUNCTION__, ndev->name); | |
1547 | ||
1548 | return 0; | |
1549 | ||
1550 | errout_close_irlap: | |
1551 | irlap_close(idev->irlap); | |
1552 | errout_free_ring: | |
1553 | vlsi_destroy_hwif(idev); | |
1554 | errout_irq: | |
1555 | free_irq(ndev->irq,ndev); | |
1556 | errout_io: | |
1557 | pci_release_regions(idev->pdev); | |
1558 | errout: | |
1559 | return err; | |
1560 | } | |
1561 | ||
1562 | static int vlsi_close(struct net_device *ndev) | |
1563 | { | |
1564 | vlsi_irda_dev_t *idev = ndev->priv; | |
1565 | ||
1566 | netif_stop_queue(ndev); | |
1567 | ||
1568 | if (idev->irlap) | |
1569 | irlap_close(idev->irlap); | |
1570 | idev->irlap = NULL; | |
1571 | ||
1572 | vlsi_stop_hw(idev); | |
1573 | ||
1574 | vlsi_destroy_hwif(idev); | |
1575 | ||
1576 | free_irq(ndev->irq,ndev); | |
1577 | ||
1578 | pci_release_regions(idev->pdev); | |
1579 | ||
1580 | IRDA_MESSAGE("%s: device %s stopped\n", __FUNCTION__, ndev->name); | |
1581 | ||
1582 | return 0; | |
1583 | } | |
1584 | ||
1585 | static int vlsi_irda_init(struct net_device *ndev) | |
1586 | { | |
1587 | vlsi_irda_dev_t *idev = ndev->priv; | |
1588 | struct pci_dev *pdev = idev->pdev; | |
1589 | ||
1590 | SET_MODULE_OWNER(ndev); | |
1591 | ||
1592 | ndev->irq = pdev->irq; | |
1593 | ndev->base_addr = pci_resource_start(pdev,0); | |
1594 | ||
1595 | /* PCI busmastering | |
1596 | * see include file for details why we need these 2 masks, in this order! | |
1597 | */ | |
1598 | ||
1599 | if (pci_set_dma_mask(pdev,DMA_MASK_USED_BY_HW) | |
1600 | || pci_set_dma_mask(pdev,DMA_MASK_MSTRPAGE)) { | |
1601 | IRDA_ERROR("%s: aborting due to PCI BM-DMA address limitations\n", __FUNCTION__); | |
1602 | return -1; | |
1603 | } | |
1604 | ||
1605 | irda_init_max_qos_capabilies(&idev->qos); | |
1606 | ||
1607 | /* the VLSI82C147 does not support 576000! */ | |
1608 | ||
1609 | idev->qos.baud_rate.bits = IR_2400 | IR_9600 | |
1610 | | IR_19200 | IR_38400 | IR_57600 | IR_115200 | |
1611 | | IR_1152000 | (IR_4000000 << 8); | |
1612 | ||
1613 | idev->qos.min_turn_time.bits = qos_mtt_bits; | |
1614 | ||
1615 | irda_qos_bits_to_value(&idev->qos); | |
1616 | ||
1617 | /* currently no public media definitions for IrDA */ | |
1618 | ||
1619 | ndev->flags |= IFF_PORTSEL | IFF_AUTOMEDIA; | |
1620 | ndev->if_port = IF_PORT_UNKNOWN; | |
1621 | ||
1622 | ndev->open = vlsi_open; | |
1623 | ndev->stop = vlsi_close; | |
1624 | ndev->get_stats = vlsi_get_stats; | |
1625 | ndev->hard_start_xmit = vlsi_hard_start_xmit; | |
1626 | ndev->do_ioctl = vlsi_ioctl; | |
1627 | ndev->tx_timeout = vlsi_tx_timeout; | |
1628 | ndev->watchdog_timeo = 500*HZ/1000; /* max. allowed turn time for IrLAP */ | |
1629 | ||
1630 | SET_NETDEV_DEV(ndev, &pdev->dev); | |
1631 | ||
1632 | return 0; | |
1633 | } | |
1634 | ||
1635 | /**************************************************************/ | |
1636 | ||
1637 | static int __devinit | |
1638 | vlsi_irda_probe(struct pci_dev *pdev, const struct pci_device_id *id) | |
1639 | { | |
1640 | struct net_device *ndev; | |
1641 | vlsi_irda_dev_t *idev; | |
1642 | ||
1643 | if (pci_enable_device(pdev)) | |
1644 | goto out; | |
1645 | else | |
1646 | pdev->current_state = 0; /* hw must be running now */ | |
1647 | ||
1648 | IRDA_MESSAGE("%s: IrDA PCI controller %s detected\n", | |
1649 | drivername, PCIDEV_NAME(pdev)); | |
1650 | ||
1651 | if ( !pci_resource_start(pdev,0) | |
1652 | || !(pci_resource_flags(pdev,0) & IORESOURCE_IO) ) { | |
1653 | IRDA_ERROR("%s: bar 0 invalid", __FUNCTION__); | |
1654 | goto out_disable; | |
1655 | } | |
1656 | ||
1657 | ndev = alloc_irdadev(sizeof(*idev)); | |
1658 | if (ndev==NULL) { | |
1659 | IRDA_ERROR("%s: Unable to allocate device memory.\n", | |
1660 | __FUNCTION__); | |
1661 | goto out_disable; | |
1662 | } | |
1663 | ||
1664 | idev = ndev->priv; | |
1665 | ||
1666 | spin_lock_init(&idev->lock); | |
1667 | init_MUTEX(&idev->sem); | |
1668 | down(&idev->sem); | |
1669 | idev->pdev = pdev; | |
1670 | ||
1671 | if (vlsi_irda_init(ndev) < 0) | |
1672 | goto out_freedev; | |
1673 | ||
1674 | if (register_netdev(ndev) < 0) { | |
1675 | IRDA_ERROR("%s: register_netdev failed\n", __FUNCTION__); | |
1676 | goto out_freedev; | |
1677 | } | |
1678 | ||
1679 | if (vlsi_proc_root != NULL) { | |
1680 | struct proc_dir_entry *ent; | |
1681 | ||
1682 | ent = create_proc_entry(ndev->name, S_IFREG|S_IRUGO, vlsi_proc_root); | |
1683 | if (!ent) { | |
1684 | IRDA_WARNING("%s: failed to create proc entry\n", | |
1685 | __FUNCTION__); | |
1686 | } else { | |
1687 | ent->data = ndev; | |
1688 | ent->proc_fops = VLSI_PROC_FOPS; | |
1689 | ent->size = 0; | |
1690 | } | |
1691 | idev->proc_entry = ent; | |
1692 | } | |
1693 | IRDA_MESSAGE("%s: registered device %s\n", drivername, ndev->name); | |
1694 | ||
1695 | pci_set_drvdata(pdev, ndev); | |
1696 | up(&idev->sem); | |
1697 | ||
1698 | return 0; | |
1699 | ||
1700 | out_freedev: | |
1701 | up(&idev->sem); | |
1702 | free_netdev(ndev); | |
1703 | out_disable: | |
1704 | pci_disable_device(pdev); | |
1705 | out: | |
1706 | pci_set_drvdata(pdev, NULL); | |
1707 | return -ENODEV; | |
1708 | } | |
1709 | ||
1710 | static void __devexit vlsi_irda_remove(struct pci_dev *pdev) | |
1711 | { | |
1712 | struct net_device *ndev = pci_get_drvdata(pdev); | |
1713 | vlsi_irda_dev_t *idev; | |
1714 | ||
1715 | if (!ndev) { | |
1716 | IRDA_ERROR("%s: lost netdevice?\n", drivername); | |
1717 | return; | |
1718 | } | |
1719 | ||
1720 | unregister_netdev(ndev); | |
1721 | ||
1722 | idev = ndev->priv; | |
1723 | down(&idev->sem); | |
1724 | if (idev->proc_entry) { | |
1725 | remove_proc_entry(ndev->name, vlsi_proc_root); | |
1726 | idev->proc_entry = NULL; | |
1727 | } | |
1728 | up(&idev->sem); | |
1729 | ||
1730 | free_netdev(ndev); | |
1731 | ||
1732 | pci_set_drvdata(pdev, NULL); | |
1733 | ||
1734 | IRDA_MESSAGE("%s: %s removed\n", drivername, PCIDEV_NAME(pdev)); | |
1735 | } | |
1736 | ||
1737 | #ifdef CONFIG_PM | |
1738 | ||
1739 | /* The Controller doesn't provide PCI PM capabilities as defined by PCI specs. | |
1740 | * Some of the Linux PCI-PM code however depends on this, for example in | |
1741 | * pci_set_power_state(). So we have to take care to perform the required | |
1742 | * operations on our own (particularly reflecting the pdev->current_state) | |
1743 | * otherwise we might get cheated by pci-pm. | |
1744 | */ | |
1745 | ||
1746 | ||
05adc3b7 | 1747 | static int vlsi_irda_suspend(struct pci_dev *pdev, pm_message_t state) |
1da177e4 LT |
1748 | { |
1749 | struct net_device *ndev = pci_get_drvdata(pdev); | |
1750 | vlsi_irda_dev_t *idev; | |
1751 | ||
1da177e4 LT |
1752 | if (!ndev) { |
1753 | IRDA_ERROR("%s - %s: no netdevice \n", | |
1754 | __FUNCTION__, PCIDEV_NAME(pdev)); | |
1755 | return 0; | |
1756 | } | |
1757 | idev = ndev->priv; | |
1758 | down(&idev->sem); | |
1759 | if (pdev->current_state != 0) { /* already suspended */ | |
1760 | if (state > pdev->current_state) { /* simply go deeper */ | |
1761 | pci_set_power_state(pdev,state); | |
1762 | pdev->current_state = state; | |
1763 | } | |
1764 | else | |
1765 | IRDA_ERROR("%s - %s: invalid suspend request %u -> %u\n", __FUNCTION__, PCIDEV_NAME(pdev), pdev->current_state, state); | |
1766 | up(&idev->sem); | |
1767 | return 0; | |
1768 | } | |
1769 | ||
1770 | if (netif_running(ndev)) { | |
1771 | netif_device_detach(ndev); | |
1772 | vlsi_stop_hw(idev); | |
1773 | pci_save_state(pdev); | |
1774 | if (!idev->new_baud) | |
1775 | /* remember speed settings to restore on resume */ | |
1776 | idev->new_baud = idev->baud; | |
1777 | } | |
1778 | ||
829ca9a3 | 1779 | pci_set_power_state(pdev, pci_choose_state(pdev, state)); |
1da177e4 LT |
1780 | pdev->current_state = state; |
1781 | idev->resume_ok = 1; | |
1782 | up(&idev->sem); | |
1783 | return 0; | |
1784 | } | |
1785 | ||
1786 | static int vlsi_irda_resume(struct pci_dev *pdev) | |
1787 | { | |
1788 | struct net_device *ndev = pci_get_drvdata(pdev); | |
1789 | vlsi_irda_dev_t *idev; | |
1790 | ||
1791 | if (!ndev) { | |
1792 | IRDA_ERROR("%s - %s: no netdevice \n", | |
1793 | __FUNCTION__, PCIDEV_NAME(pdev)); | |
1794 | return 0; | |
1795 | } | |
1796 | idev = ndev->priv; | |
1797 | down(&idev->sem); | |
1798 | if (pdev->current_state == 0) { | |
1799 | up(&idev->sem); | |
1800 | IRDA_WARNING("%s - %s: already resumed\n", | |
1801 | __FUNCTION__, PCIDEV_NAME(pdev)); | |
1802 | return 0; | |
1803 | } | |
1804 | ||
829ca9a3 PM |
1805 | pci_set_power_state(pdev, PCI_D0); |
1806 | pdev->current_state = PM_EVENT_ON; | |
1da177e4 LT |
1807 | |
1808 | if (!idev->resume_ok) { | |
1809 | /* should be obsolete now - but used to happen due to: | |
1810 | * - pci layer initially setting pdev->current_state = 4 (unknown) | |
1811 | * - pci layer did not walk the save_state-tree (might be APM problem) | |
1812 | * so we could not refuse to suspend from undefined state | |
1813 | * - vlsi_irda_suspend detected invalid state and refused to save | |
1814 | * configuration for resume - but was too late to stop suspending | |
1815 | * - vlsi_irda_resume got screwed when trying to resume from garbage | |
1816 | * | |
1817 | * now we explicitly set pdev->current_state = 0 after enabling the | |
1818 | * device and independently resume_ok should catch any garbage config. | |
1819 | */ | |
1820 | IRDA_WARNING("%s - hm, nothing to resume?\n", __FUNCTION__); | |
1821 | up(&idev->sem); | |
1822 | return 0; | |
1823 | } | |
1824 | ||
1825 | if (netif_running(ndev)) { | |
1826 | pci_restore_state(pdev); | |
1827 | vlsi_start_hw(idev); | |
1828 | netif_device_attach(ndev); | |
1829 | } | |
1830 | idev->resume_ok = 0; | |
1831 | up(&idev->sem); | |
1832 | return 0; | |
1833 | } | |
1834 | ||
1835 | #endif /* CONFIG_PM */ | |
1836 | ||
1837 | /*********************************************************/ | |
1838 | ||
1839 | static struct pci_driver vlsi_irda_driver = { | |
1840 | .name = drivername, | |
1841 | .id_table = vlsi_irda_table, | |
1842 | .probe = vlsi_irda_probe, | |
1843 | .remove = __devexit_p(vlsi_irda_remove), | |
1844 | #ifdef CONFIG_PM | |
1845 | .suspend = vlsi_irda_suspend, | |
1846 | .resume = vlsi_irda_resume, | |
1847 | #endif | |
1848 | }; | |
1849 | ||
1850 | #define PROC_DIR ("driver/" DRIVER_NAME) | |
1851 | ||
1852 | static int __init vlsi_mod_init(void) | |
1853 | { | |
1854 | int i, ret; | |
1855 | ||
1856 | if (clksrc < 0 || clksrc > 3) { | |
1857 | IRDA_ERROR("%s: invalid clksrc=%d\n", drivername, clksrc); | |
1858 | return -1; | |
1859 | } | |
1860 | ||
1861 | for (i = 0; i < 2; i++) { | |
1862 | switch(ringsize[i]) { | |
1863 | case 4: | |
1864 | case 8: | |
1865 | case 16: | |
1866 | case 32: | |
1867 | case 64: | |
1868 | break; | |
1869 | default: | |
1870 | IRDA_WARNING("%s: invalid %s ringsize %d, using default=8", drivername, (i)?"rx":"tx", ringsize[i]); | |
1871 | ringsize[i] = 8; | |
1872 | break; | |
1873 | } | |
1874 | } | |
1875 | ||
1876 | sirpulse = !!sirpulse; | |
1877 | ||
1878 | /* create_proc_entry returns NULL if !CONFIG_PROC_FS. | |
1879 | * Failure to create the procfs entry is handled like running | |
1880 | * without procfs - it's not required for the driver to work. | |
1881 | */ | |
1882 | vlsi_proc_root = create_proc_entry(PROC_DIR, S_IFDIR, NULL); | |
1883 | if (vlsi_proc_root) { | |
1884 | /* protect registered procdir against module removal. | |
1885 | * Because we are in the module init path there's no race | |
1886 | * window after create_proc_entry (and no barrier needed). | |
1887 | */ | |
1888 | vlsi_proc_root->owner = THIS_MODULE; | |
1889 | } | |
1890 | ||
1891 | ret = pci_module_init(&vlsi_irda_driver); | |
1892 | ||
1893 | if (ret && vlsi_proc_root) | |
1894 | remove_proc_entry(PROC_DIR, NULL); | |
1895 | return ret; | |
1896 | ||
1897 | } | |
1898 | ||
1899 | static void __exit vlsi_mod_exit(void) | |
1900 | { | |
1901 | pci_unregister_driver(&vlsi_irda_driver); | |
1902 | if (vlsi_proc_root) | |
1903 | remove_proc_entry(PROC_DIR, NULL); | |
1904 | } | |
1905 | ||
1906 | module_init(vlsi_mod_init); | |
1907 | module_exit(vlsi_mod_exit); |