]>
Commit | Line | Data |
---|---|---|
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 | ||
29 | MODULE_DESCRIPTION(DRIVER_DESCRIPTION); | |
30 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
31 | MODULE_LICENSE("GPL"); | |
32 | ||
33 | /********************************************************/ | |
34 | ||
35 | #include <linux/kernel.h> | |
497ec1f2 | 36 | #include <linux/ktime.h> |
1da177e4 | 37 | #include <linux/init.h> |
a6b7a407 | 38 | #include <linux/interrupt.h> |
1da177e4 LT |
39 | #include <linux/pci.h> |
40 | #include <linux/slab.h> | |
41 | #include <linux/netdevice.h> | |
42 | #include <linux/skbuff.h> | |
43 | #include <linux/delay.h> | |
1da177e4 LT |
44 | #include <linux/proc_fs.h> |
45 | #include <linux/seq_file.h> | |
497ec1f2 | 46 | #include <linux/math64.h> |
aa429110 | 47 | #include <linux/mutex.h> |
7c0f6ba6 | 48 | #include <linux/uaccess.h> |
1da177e4 LT |
49 | #include <asm/byteorder.h> |
50 | ||
51 | #include <net/irda/irda.h> | |
52 | #include <net/irda/irda_device.h> | |
53 | #include <net/irda/wrapper.h> | |
54 | #include <net/irda/crc.h> | |
55 | ||
56 | #include "vlsi_ir.h" | |
57 | ||
58 | /********************************************************/ | |
59 | ||
60 | static /* const */ char drivername[] = DRIVER_NAME; | |
61 | ||
9baa3c34 | 62 | static const struct pci_device_id vlsi_irda_table[] = { |
1da177e4 LT |
63 | { |
64 | .class = PCI_CLASS_WIRELESS_IRDA << 8, | |
65 | .class_mask = PCI_CLASS_SUBCLASS_MASK << 8, | |
66 | .vendor = PCI_VENDOR_ID_VLSI, | |
67 | .device = PCI_DEVICE_ID_VLSI_82C147, | |
68 | .subvendor = PCI_ANY_ID, | |
69 | .subdevice = PCI_ANY_ID, | |
70 | }, | |
71 | { /* all zeroes */ } | |
72 | }; | |
73 | ||
74 | MODULE_DEVICE_TABLE(pci, vlsi_irda_table); | |
75 | ||
76 | /********************************************************/ | |
77 | ||
78 | /* clksrc: which clock source to be used | |
79 | * 0: auto - try PLL, fallback to 40MHz XCLK | |
80 | * 1: on-chip 48MHz PLL | |
81 | * 2: external 48MHz XCLK | |
82 | * 3: external 40MHz XCLK (HP OB-800) | |
83 | */ | |
84 | ||
85 | static int clksrc = 0; /* default is 0(auto) */ | |
86 | module_param(clksrc, int, 0); | |
87 | MODULE_PARM_DESC(clksrc, "clock input source selection"); | |
88 | ||
89 | /* ringsize: size of the tx and rx descriptor rings | |
90 | * independent for tx and rx | |
91 | * specify as ringsize=tx[,rx] | |
92 | * allowed values: 4, 8, 16, 32, 64 | |
93 | * Due to the IrDA 1.x max. allowed window size=7, | |
94 | * there should be no gain when using rings larger than 8 | |
95 | */ | |
96 | ||
97 | static int ringsize[] = {8,8}; /* default is tx=8 / rx=8 */ | |
98 | module_param_array(ringsize, int, NULL, 0); | |
99 | MODULE_PARM_DESC(ringsize, "TX, RX ring descriptor size"); | |
100 | ||
101 | /* sirpulse: tuning of the SIR pulse width within IrPHY 1.3 limits | |
102 | * 0: very short, 1.5us (exception: 6us at 2.4 kbaud) | |
103 | * 1: nominal 3/16 bittime width | |
104 | * note: IrDA compliant peer devices should be happy regardless | |
105 | * which one is used. Primary goal is to save some power | |
106 | * on the sender's side - at 9.6kbaud for example the short | |
107 | * pulse width saves more than 90% of the transmitted IR power. | |
108 | */ | |
109 | ||
110 | static int sirpulse = 1; /* default is 3/16 bittime */ | |
111 | module_param(sirpulse, int, 0); | |
112 | MODULE_PARM_DESC(sirpulse, "SIR pulse width tuning"); | |
113 | ||
114 | /* qos_mtt_bits: encoded min-turn-time value we require the peer device | |
115 | * to use before transmitting to us. "Type 1" (per-station) | |
116 | * bitfield according to IrLAP definition (section 6.6.8) | |
117 | * Don't know which transceiver is used by my OB800 - the | |
118 | * pretty common HP HDLS-1100 requires 1 msec - so lets use this. | |
119 | */ | |
120 | ||
121 | static int qos_mtt_bits = 0x07; /* default is 1 ms or more */ | |
122 | module_param(qos_mtt_bits, int, 0); | |
123 | MODULE_PARM_DESC(qos_mtt_bits, "IrLAP bitfield representing min-turn-time"); | |
124 | ||
125 | /********************************************************/ | |
126 | ||
127 | static void vlsi_reg_debug(unsigned iobase, const char *s) | |
128 | { | |
129 | int i; | |
130 | ||
131 | printk(KERN_DEBUG "%s: ", s); | |
132 | for (i = 0; i < 0x20; i++) | |
133 | printk("%02x", (unsigned)inb((iobase+i))); | |
134 | printk("\n"); | |
135 | } | |
136 | ||
137 | static void vlsi_ring_debug(struct vlsi_ring *r) | |
138 | { | |
139 | struct ring_descr *rd; | |
140 | unsigned i; | |
141 | ||
142 | printk(KERN_DEBUG "%s - ring %p / size %u / mask 0x%04x / len %u / dir %d / hw %p\n", | |
a97a6f10 HH |
143 | __func__, r, r->size, r->mask, r->len, r->dir, r->rd[0].hw); |
144 | printk(KERN_DEBUG "%s - head = %d / tail = %d\n", __func__, | |
1da177e4 LT |
145 | atomic_read(&r->head) & r->mask, atomic_read(&r->tail) & r->mask); |
146 | for (i = 0; i < r->size; i++) { | |
147 | rd = &r->rd[i]; | |
a97a6f10 | 148 | printk(KERN_DEBUG "%s - ring descr %u: ", __func__, i); |
1da177e4 LT |
149 | printk("skb=%p data=%p hw=%p\n", rd->skb, rd->buf, rd->hw); |
150 | printk(KERN_DEBUG "%s - hw: status=%02x count=%u addr=0x%08x\n", | |
a97a6f10 | 151 | __func__, (unsigned) rd_get_status(rd), |
1da177e4 LT |
152 | (unsigned) rd_get_count(rd), (unsigned) rd_get_addr(rd)); |
153 | } | |
154 | } | |
155 | ||
156 | /********************************************************/ | |
157 | ||
158 | /* needed regardless of CONFIG_PROC_FS */ | |
159 | static struct proc_dir_entry *vlsi_proc_root = NULL; | |
160 | ||
161 | #ifdef CONFIG_PROC_FS | |
162 | ||
163 | static void vlsi_proc_pdev(struct seq_file *seq, struct pci_dev *pdev) | |
164 | { | |
165 | unsigned iobase = pci_resource_start(pdev, 0); | |
166 | unsigned i; | |
167 | ||
978e9aec | 168 | seq_printf(seq, "\n%s (vid/did: [%04x:%04x])\n", |
778a43fd | 169 | pci_name(pdev), (int)pdev->vendor, (int)pdev->device); |
1da177e4 LT |
170 | seq_printf(seq, "pci-power-state: %u\n", (unsigned) pdev->current_state); |
171 | seq_printf(seq, "resources: irq=%u / io=0x%04x / dma_mask=0x%016Lx\n", | |
172 | pdev->irq, (unsigned)pci_resource_start(pdev, 0), (unsigned long long)pdev->dma_mask); | |
173 | seq_printf(seq, "hw registers: "); | |
174 | for (i = 0; i < 0x20; i++) | |
175 | seq_printf(seq, "%02x", (unsigned)inb((iobase+i))); | |
176 | seq_printf(seq, "\n"); | |
177 | } | |
178 | ||
179 | static void vlsi_proc_ndev(struct seq_file *seq, struct net_device *ndev) | |
180 | { | |
4cf1653a | 181 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
1da177e4 LT |
182 | u8 byte; |
183 | u16 word; | |
497ec1f2 | 184 | s32 sec, usec; |
1da177e4 LT |
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")); | |
497ec1f2 CZ |
280 | sec = div_s64_rem(ktime_us_delta(ktime_get(), idev->last_rx), |
281 | USEC_PER_SEC, &usec); | |
282 | seq_printf(seq, "last rx: %ul.%06u sec\n", sec, usec); | |
1da177e4 LT |
283 | |
284 | seq_printf(seq, "RX: packets=%lu / bytes=%lu / errors=%lu / dropped=%lu", | |
af049081 SH |
285 | ndev->stats.rx_packets, ndev->stats.rx_bytes, ndev->stats.rx_errors, |
286 | ndev->stats.rx_dropped); | |
1da177e4 | 287 | seq_printf(seq, " / overrun=%lu / length=%lu / frame=%lu / crc=%lu\n", |
af049081 SH |
288 | ndev->stats.rx_over_errors, ndev->stats.rx_length_errors, |
289 | ndev->stats.rx_frame_errors, ndev->stats.rx_crc_errors); | |
1da177e4 | 290 | seq_printf(seq, "TX: packets=%lu / bytes=%lu / errors=%lu / dropped=%lu / fifo=%lu\n", |
af049081 SH |
291 | ndev->stats.tx_packets, ndev->stats.tx_bytes, ndev->stats.tx_errors, |
292 | ndev->stats.tx_dropped, ndev->stats.tx_fifo_errors); | |
1da177e4 LT |
293 | |
294 | } | |
295 | ||
296 | static void vlsi_proc_ring(struct seq_file *seq, struct vlsi_ring *r) | |
297 | { | |
298 | struct ring_descr *rd; | |
299 | unsigned i, j; | |
300 | int h, t; | |
301 | ||
302 | seq_printf(seq, "size %u / mask 0x%04x / len %u / dir %d / hw %p\n", | |
303 | r->size, r->mask, r->len, r->dir, r->rd[0].hw); | |
304 | h = atomic_read(&r->head) & r->mask; | |
305 | t = atomic_read(&r->tail) & r->mask; | |
306 | seq_printf(seq, "head = %d / tail = %d ", h, t); | |
307 | if (h == t) | |
308 | seq_printf(seq, "(empty)\n"); | |
309 | else { | |
310 | if (((t+1)&r->mask) == h) | |
311 | seq_printf(seq, "(full)\n"); | |
312 | else | |
313 | seq_printf(seq, "(level = %d)\n", ((unsigned)(t-h) & r->mask)); | |
314 | rd = &r->rd[h]; | |
315 | j = (unsigned) rd_get_count(rd); | |
316 | seq_printf(seq, "current: rd = %d / status = %02x / len = %u\n", | |
317 | h, (unsigned)rd_get_status(rd), j); | |
318 | if (j > 0) { | |
be07b79d AS |
319 | seq_printf(seq, " data: %*ph\n", |
320 | min_t(unsigned, j, 20), rd->buf); | |
1da177e4 LT |
321 | } |
322 | } | |
323 | for (i = 0; i < r->size; i++) { | |
324 | rd = &r->rd[i]; | |
325 | seq_printf(seq, "> ring descr %u: ", i); | |
326 | seq_printf(seq, "skb=%p data=%p hw=%p\n", rd->skb, rd->buf, rd->hw); | |
327 | seq_printf(seq, " hw: status=%02x count=%u busaddr=0x%08x\n", | |
328 | (unsigned) rd_get_status(rd), | |
329 | (unsigned) rd_get_count(rd), (unsigned) rd_get_addr(rd)); | |
330 | } | |
331 | } | |
332 | ||
333 | static int vlsi_seq_show(struct seq_file *seq, void *v) | |
334 | { | |
335 | struct net_device *ndev = seq->private; | |
4cf1653a | 336 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
1da177e4 LT |
337 | unsigned long flags; |
338 | ||
339 | seq_printf(seq, "\n%s %s\n\n", DRIVER_NAME, DRIVER_VERSION); | |
340 | seq_printf(seq, "clksrc: %s\n", | |
341 | (clksrc>=2) ? ((clksrc==3)?"40MHz XCLK":"48MHz XCLK") | |
342 | : ((clksrc==1)?"48MHz PLL":"autodetect")); | |
343 | seq_printf(seq, "ringsize: tx=%d / rx=%d\n", | |
344 | ringsize[0], ringsize[1]); | |
345 | seq_printf(seq, "sirpulse: %s\n", (sirpulse)?"3/16 bittime":"short"); | |
346 | seq_printf(seq, "qos_mtt_bits: 0x%02x\n", (unsigned)qos_mtt_bits); | |
347 | ||
348 | spin_lock_irqsave(&idev->lock, flags); | |
349 | if (idev->pdev != NULL) { | |
350 | vlsi_proc_pdev(seq, idev->pdev); | |
351 | ||
352 | if (idev->pdev->current_state == 0) | |
353 | vlsi_proc_ndev(seq, ndev); | |
354 | else | |
355 | seq_printf(seq, "\nPCI controller down - resume_ok = %d\n", | |
356 | idev->resume_ok); | |
357 | if (netif_running(ndev) && idev->rx_ring && idev->tx_ring) { | |
358 | seq_printf(seq, "\n--------- RX ring -----------\n\n"); | |
359 | vlsi_proc_ring(seq, idev->rx_ring); | |
360 | seq_printf(seq, "\n--------- TX ring -----------\n\n"); | |
361 | vlsi_proc_ring(seq, idev->tx_ring); | |
362 | } | |
363 | } | |
364 | seq_printf(seq, "\n"); | |
365 | spin_unlock_irqrestore(&idev->lock, flags); | |
366 | ||
367 | return 0; | |
368 | } | |
369 | ||
370 | static int vlsi_seq_open(struct inode *inode, struct file *file) | |
371 | { | |
d9dda78b | 372 | return single_open(file, vlsi_seq_show, PDE_DATA(inode)); |
1da177e4 LT |
373 | } |
374 | ||
d54b1fdb | 375 | static const struct file_operations vlsi_proc_fops = { |
1da177e4 LT |
376 | .owner = THIS_MODULE, |
377 | .open = vlsi_seq_open, | |
378 | .read = seq_read, | |
379 | .llseek = seq_lseek, | |
380 | .release = single_release, | |
381 | }; | |
382 | ||
383 | #define VLSI_PROC_FOPS (&vlsi_proc_fops) | |
384 | ||
385 | #else /* CONFIG_PROC_FS */ | |
386 | #define VLSI_PROC_FOPS NULL | |
387 | #endif | |
388 | ||
389 | /********************************************************/ | |
390 | ||
391 | static struct vlsi_ring *vlsi_alloc_ring(struct pci_dev *pdev, struct ring_descr_hw *hwmap, | |
392 | unsigned size, unsigned len, int dir) | |
393 | { | |
394 | struct vlsi_ring *r; | |
395 | struct ring_descr *rd; | |
396 | unsigned i, j; | |
397 | dma_addr_t busaddr; | |
398 | ||
399 | if (!size || ((size-1)&size)!=0) /* must be >0 and power of 2 */ | |
400 | return NULL; | |
401 | ||
402 | r = kmalloc(sizeof(*r) + size * sizeof(struct ring_descr), GFP_KERNEL); | |
403 | if (!r) | |
404 | return NULL; | |
405 | memset(r, 0, sizeof(*r)); | |
406 | ||
407 | r->pdev = pdev; | |
408 | r->dir = dir; | |
409 | r->len = len; | |
410 | r->rd = (struct ring_descr *)(r+1); | |
411 | r->mask = size - 1; | |
412 | r->size = size; | |
413 | atomic_set(&r->head, 0); | |
414 | atomic_set(&r->tail, 0); | |
415 | ||
416 | for (i = 0; i < size; i++) { | |
417 | rd = r->rd + i; | |
418 | memset(rd, 0, sizeof(*rd)); | |
419 | rd->hw = hwmap + i; | |
420 | rd->buf = kmalloc(len, GFP_KERNEL|GFP_DMA); | |
8e95a202 JP |
421 | if (rd->buf == NULL || |
422 | !(busaddr = pci_map_single(pdev, rd->buf, len, dir))) { | |
1da177e4 | 423 | if (rd->buf) { |
6c91023d JP |
424 | net_err_ratelimited("%s: failed to create PCI-MAP for %p\n", |
425 | __func__, rd->buf); | |
1da177e4 LT |
426 | kfree(rd->buf); |
427 | rd->buf = NULL; | |
428 | } | |
429 | for (j = 0; j < i; j++) { | |
430 | rd = r->rd + j; | |
431 | busaddr = rd_get_addr(rd); | |
432 | rd_set_addr_status(rd, 0, 0); | |
433 | if (busaddr) | |
434 | pci_unmap_single(pdev, busaddr, len, dir); | |
435 | kfree(rd->buf); | |
436 | rd->buf = NULL; | |
437 | } | |
438 | kfree(r); | |
439 | return NULL; | |
440 | } | |
441 | rd_set_addr_status(rd, busaddr, 0); | |
442 | /* initially, the dma buffer is owned by the CPU */ | |
443 | rd->skb = NULL; | |
444 | } | |
445 | return r; | |
446 | } | |
447 | ||
448 | static int vlsi_free_ring(struct vlsi_ring *r) | |
449 | { | |
450 | struct ring_descr *rd; | |
451 | unsigned i; | |
452 | dma_addr_t busaddr; | |
453 | ||
454 | for (i = 0; i < r->size; i++) { | |
455 | rd = r->rd + i; | |
456 | if (rd->skb) | |
457 | dev_kfree_skb_any(rd->skb); | |
458 | busaddr = rd_get_addr(rd); | |
459 | rd_set_addr_status(rd, 0, 0); | |
460 | if (busaddr) | |
461 | pci_unmap_single(r->pdev, busaddr, r->len, r->dir); | |
b4558ea9 | 462 | kfree(rd->buf); |
1da177e4 LT |
463 | } |
464 | kfree(r); | |
465 | return 0; | |
466 | } | |
467 | ||
468 | static int vlsi_create_hwif(vlsi_irda_dev_t *idev) | |
469 | { | |
470 | char *ringarea; | |
471 | struct ring_descr_hw *hwmap; | |
472 | ||
473 | idev->virtaddr = NULL; | |
474 | idev->busaddr = 0; | |
475 | ||
38537b7f JP |
476 | ringarea = pci_zalloc_consistent(idev->pdev, HW_RING_AREA_SIZE, |
477 | &idev->busaddr); | |
6c91023d | 478 | if (!ringarea) |
1da177e4 | 479 | goto out; |
1da177e4 LT |
480 | |
481 | hwmap = (struct ring_descr_hw *)ringarea; | |
482 | idev->rx_ring = vlsi_alloc_ring(idev->pdev, hwmap, ringsize[1], | |
483 | XFER_BUF_SIZE, PCI_DMA_FROMDEVICE); | |
484 | if (idev->rx_ring == NULL) | |
485 | goto out_unmap; | |
486 | ||
487 | hwmap += MAX_RING_DESCR; | |
488 | idev->tx_ring = vlsi_alloc_ring(idev->pdev, hwmap, ringsize[0], | |
489 | XFER_BUF_SIZE, PCI_DMA_TODEVICE); | |
490 | if (idev->tx_ring == NULL) | |
491 | goto out_free_rx; | |
492 | ||
493 | idev->virtaddr = ringarea; | |
494 | return 0; | |
495 | ||
496 | out_free_rx: | |
497 | vlsi_free_ring(idev->rx_ring); | |
498 | out_unmap: | |
499 | idev->rx_ring = idev->tx_ring = NULL; | |
500 | pci_free_consistent(idev->pdev, HW_RING_AREA_SIZE, ringarea, idev->busaddr); | |
501 | idev->busaddr = 0; | |
502 | out: | |
503 | return -ENOMEM; | |
504 | } | |
505 | ||
506 | static int vlsi_destroy_hwif(vlsi_irda_dev_t *idev) | |
507 | { | |
508 | vlsi_free_ring(idev->rx_ring); | |
509 | vlsi_free_ring(idev->tx_ring); | |
510 | idev->rx_ring = idev->tx_ring = NULL; | |
511 | ||
512 | if (idev->busaddr) | |
513 | pci_free_consistent(idev->pdev,HW_RING_AREA_SIZE,idev->virtaddr,idev->busaddr); | |
514 | ||
515 | idev->virtaddr = NULL; | |
516 | idev->busaddr = 0; | |
517 | ||
518 | return 0; | |
519 | } | |
520 | ||
521 | /********************************************************/ | |
522 | ||
523 | static int vlsi_process_rx(struct vlsi_ring *r, struct ring_descr *rd) | |
524 | { | |
525 | u16 status; | |
526 | int crclen, len = 0; | |
527 | struct sk_buff *skb; | |
528 | int ret = 0; | |
1ecfd462 | 529 | struct net_device *ndev = pci_get_drvdata(r->pdev); |
4cf1653a | 530 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
1da177e4 LT |
531 | |
532 | pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir); | |
533 | /* dma buffer now owned by the CPU */ | |
534 | status = rd_get_status(rd); | |
535 | if (status & RD_RX_ERROR) { | |
536 | if (status & RD_RX_OVER) | |
537 | ret |= VLSI_RX_OVER; | |
538 | if (status & RD_RX_LENGTH) | |
539 | ret |= VLSI_RX_LENGTH; | |
540 | if (status & RD_RX_PHYERR) | |
541 | ret |= VLSI_RX_FRAME; | |
542 | if (status & RD_RX_CRCERR) | |
543 | ret |= VLSI_RX_CRC; | |
544 | goto done; | |
545 | } | |
546 | ||
547 | len = rd_get_count(rd); | |
548 | crclen = (idev->mode==IFF_FIR) ? sizeof(u32) : sizeof(u16); | |
549 | len -= crclen; /* remove trailing CRC */ | |
550 | if (len <= 0) { | |
955a9d20 | 551 | pr_debug("%s: strange frame (len=%d)\n", __func__, len); |
1da177e4 LT |
552 | ret |= VLSI_RX_DROP; |
553 | goto done; | |
554 | } | |
555 | ||
556 | if (idev->mode == IFF_SIR) { /* hw checks CRC in MIR, FIR mode */ | |
557 | ||
558 | /* rd->buf is a streaming PCI_DMA_FROMDEVICE map. Doing the | |
559 | * endian-adjustment there just in place will dirty a cache line | |
560 | * which belongs to the map and thus we must be sure it will | |
561 | * get flushed before giving the buffer back to hardware. | |
562 | * vlsi_fill_rx() will do this anyway - but here we rely on. | |
563 | */ | |
564 | le16_to_cpus(rd->buf+len); | |
565 | if (irda_calc_crc16(INIT_FCS,rd->buf,len+crclen) != GOOD_FCS) { | |
955a9d20 | 566 | pr_debug("%s: crc error\n", __func__); |
1da177e4 LT |
567 | ret |= VLSI_RX_CRC; |
568 | goto done; | |
569 | } | |
570 | } | |
571 | ||
572 | if (!rd->skb) { | |
6c91023d | 573 | net_warn_ratelimited("%s: rx packet lost\n", __func__); |
1da177e4 LT |
574 | ret |= VLSI_RX_DROP; |
575 | goto done; | |
576 | } | |
577 | ||
578 | skb = rd->skb; | |
579 | rd->skb = NULL; | |
580 | skb->dev = ndev; | |
581 | memcpy(skb_put(skb,len), rd->buf, len); | |
459a98ed | 582 | skb_reset_mac_header(skb); |
1da177e4 LT |
583 | if (in_interrupt()) |
584 | netif_rx(skb); | |
585 | else | |
586 | netif_rx_ni(skb); | |
1da177e4 LT |
587 | |
588 | done: | |
589 | rd_set_status(rd, 0); | |
590 | rd_set_count(rd, 0); | |
591 | /* buffer still owned by CPU */ | |
592 | ||
593 | return (ret) ? -ret : len; | |
594 | } | |
595 | ||
596 | static void vlsi_fill_rx(struct vlsi_ring *r) | |
597 | { | |
598 | struct ring_descr *rd; | |
599 | ||
600 | for (rd = ring_last(r); rd != NULL; rd = ring_put(r)) { | |
601 | if (rd_is_active(rd)) { | |
6c91023d JP |
602 | net_warn_ratelimited("%s: driver bug: rx descr race with hw\n", |
603 | __func__); | |
1da177e4 LT |
604 | vlsi_ring_debug(r); |
605 | break; | |
606 | } | |
607 | if (!rd->skb) { | |
608 | rd->skb = dev_alloc_skb(IRLAP_SKB_ALLOCSIZE); | |
609 | if (rd->skb) { | |
610 | skb_reserve(rd->skb,1); | |
611 | rd->skb->protocol = htons(ETH_P_IRDA); | |
612 | } | |
613 | else | |
614 | break; /* probably not worth logging? */ | |
615 | } | |
616 | /* give dma buffer back to busmaster */ | |
617 | pci_dma_sync_single_for_device(r->pdev, rd_get_addr(rd), r->len, r->dir); | |
618 | rd_activate(rd); | |
619 | } | |
620 | } | |
621 | ||
622 | static void vlsi_rx_interrupt(struct net_device *ndev) | |
623 | { | |
4cf1653a | 624 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
1da177e4 LT |
625 | struct vlsi_ring *r = idev->rx_ring; |
626 | struct ring_descr *rd; | |
627 | int ret; | |
628 | ||
629 | for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) { | |
630 | ||
631 | if (rd_is_active(rd)) | |
632 | break; | |
633 | ||
634 | ret = vlsi_process_rx(r, rd); | |
635 | ||
636 | if (ret < 0) { | |
637 | ret = -ret; | |
af049081 | 638 | ndev->stats.rx_errors++; |
1da177e4 | 639 | if (ret & VLSI_RX_DROP) |
af049081 | 640 | ndev->stats.rx_dropped++; |
1da177e4 | 641 | if (ret & VLSI_RX_OVER) |
af049081 | 642 | ndev->stats.rx_over_errors++; |
1da177e4 | 643 | if (ret & VLSI_RX_LENGTH) |
af049081 | 644 | ndev->stats.rx_length_errors++; |
1da177e4 | 645 | if (ret & VLSI_RX_FRAME) |
af049081 | 646 | ndev->stats.rx_frame_errors++; |
1da177e4 | 647 | if (ret & VLSI_RX_CRC) |
af049081 | 648 | ndev->stats.rx_crc_errors++; |
1da177e4 LT |
649 | } |
650 | else if (ret > 0) { | |
af049081 SH |
651 | ndev->stats.rx_packets++; |
652 | ndev->stats.rx_bytes += ret; | |
1da177e4 LT |
653 | } |
654 | } | |
655 | ||
497ec1f2 | 656 | idev->last_rx = ktime_get(); /* remember "now" for later mtt delay */ |
1da177e4 LT |
657 | |
658 | vlsi_fill_rx(r); | |
659 | ||
660 | if (ring_first(r) == NULL) { | |
661 | /* we are in big trouble, if this should ever happen */ | |
6c91023d | 662 | net_err_ratelimited("%s: rx ring exhausted!\n", __func__); |
1da177e4 LT |
663 | vlsi_ring_debug(r); |
664 | } | |
665 | else | |
666 | outw(0, ndev->base_addr+VLSI_PIO_PROMPT); | |
667 | } | |
668 | ||
669 | /* caller must have stopped the controller from busmastering */ | |
670 | ||
671 | static void vlsi_unarm_rx(vlsi_irda_dev_t *idev) | |
672 | { | |
af049081 | 673 | struct net_device *ndev = pci_get_drvdata(idev->pdev); |
1da177e4 LT |
674 | struct vlsi_ring *r = idev->rx_ring; |
675 | struct ring_descr *rd; | |
676 | int ret; | |
677 | ||
678 | for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) { | |
679 | ||
680 | ret = 0; | |
681 | if (rd_is_active(rd)) { | |
682 | rd_set_status(rd, 0); | |
683 | if (rd_get_count(rd)) { | |
955a9d20 | 684 | pr_debug("%s - dropping rx packet\n", __func__); |
1da177e4 LT |
685 | ret = -VLSI_RX_DROP; |
686 | } | |
687 | rd_set_count(rd, 0); | |
688 | pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir); | |
689 | if (rd->skb) { | |
690 | dev_kfree_skb_any(rd->skb); | |
691 | rd->skb = NULL; | |
692 | } | |
693 | } | |
694 | else | |
695 | ret = vlsi_process_rx(r, rd); | |
696 | ||
697 | if (ret < 0) { | |
698 | ret = -ret; | |
af049081 | 699 | ndev->stats.rx_errors++; |
1da177e4 | 700 | if (ret & VLSI_RX_DROP) |
af049081 | 701 | ndev->stats.rx_dropped++; |
1da177e4 | 702 | if (ret & VLSI_RX_OVER) |
af049081 | 703 | ndev->stats.rx_over_errors++; |
1da177e4 | 704 | if (ret & VLSI_RX_LENGTH) |
af049081 | 705 | ndev->stats.rx_length_errors++; |
1da177e4 | 706 | if (ret & VLSI_RX_FRAME) |
af049081 | 707 | ndev->stats.rx_frame_errors++; |
1da177e4 | 708 | if (ret & VLSI_RX_CRC) |
af049081 | 709 | ndev->stats.rx_crc_errors++; |
1da177e4 LT |
710 | } |
711 | else if (ret > 0) { | |
af049081 SH |
712 | ndev->stats.rx_packets++; |
713 | ndev->stats.rx_bytes += ret; | |
1da177e4 LT |
714 | } |
715 | } | |
716 | } | |
717 | ||
718 | /********************************************************/ | |
719 | ||
720 | static int vlsi_process_tx(struct vlsi_ring *r, struct ring_descr *rd) | |
721 | { | |
722 | u16 status; | |
723 | int len; | |
724 | int ret; | |
725 | ||
726 | pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir); | |
727 | /* dma buffer now owned by the CPU */ | |
728 | status = rd_get_status(rd); | |
729 | if (status & RD_TX_UNDRN) | |
730 | ret = VLSI_TX_FIFO; | |
731 | else | |
732 | ret = 0; | |
733 | rd_set_status(rd, 0); | |
734 | ||
735 | if (rd->skb) { | |
736 | len = rd->skb->len; | |
737 | dev_kfree_skb_any(rd->skb); | |
738 | rd->skb = NULL; | |
739 | } | |
740 | else /* tx-skb already freed? - should never happen */ | |
741 | len = rd_get_count(rd); /* incorrect for SIR! (due to wrapping) */ | |
742 | ||
743 | rd_set_count(rd, 0); | |
744 | /* dma buffer still owned by the CPU */ | |
745 | ||
746 | return (ret) ? -ret : len; | |
747 | } | |
748 | ||
749 | static int vlsi_set_baud(vlsi_irda_dev_t *idev, unsigned iobase) | |
750 | { | |
751 | u16 nphyctl; | |
752 | u16 config; | |
753 | unsigned mode; | |
754 | int ret; | |
755 | int baudrate; | |
756 | int fifocnt; | |
757 | ||
758 | baudrate = idev->new_baud; | |
955a9d20 | 759 | pr_debug("%s: %d -> %d\n", __func__, idev->baud, idev->new_baud); |
1da177e4 LT |
760 | if (baudrate == 4000000) { |
761 | mode = IFF_FIR; | |
762 | config = IRCFG_FIR; | |
763 | nphyctl = PHYCTL_FIR; | |
764 | } | |
765 | else if (baudrate == 1152000) { | |
766 | mode = IFF_MIR; | |
767 | config = IRCFG_MIR | IRCFG_CRC16; | |
768 | nphyctl = PHYCTL_MIR(clksrc==3); | |
769 | } | |
770 | else { | |
771 | mode = IFF_SIR; | |
772 | config = IRCFG_SIR | IRCFG_SIRFILT | IRCFG_RXANY; | |
773 | switch(baudrate) { | |
774 | default: | |
6c91023d JP |
775 | net_warn_ratelimited("%s: undefined baudrate %d - fallback to 9600!\n", |
776 | __func__, baudrate); | |
1da177e4 LT |
777 | baudrate = 9600; |
778 | /* fallthru */ | |
779 | case 2400: | |
780 | case 9600: | |
781 | case 19200: | |
782 | case 38400: | |
783 | case 57600: | |
784 | case 115200: | |
785 | nphyctl = PHYCTL_SIR(baudrate,sirpulse,clksrc==3); | |
786 | break; | |
787 | } | |
788 | } | |
789 | config |= IRCFG_MSTR | IRCFG_ENRX; | |
790 | ||
791 | fifocnt = inw(iobase+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK; | |
792 | if (fifocnt != 0) { | |
955a9d20 | 793 | pr_debug("%s: rx fifo not empty(%d)\n", __func__, fifocnt); |
1da177e4 LT |
794 | } |
795 | ||
796 | outw(0, iobase+VLSI_PIO_IRENABLE); | |
797 | outw(config, iobase+VLSI_PIO_IRCFG); | |
798 | outw(nphyctl, iobase+VLSI_PIO_NPHYCTL); | |
799 | wmb(); | |
800 | outw(IRENABLE_PHYANDCLOCK, iobase+VLSI_PIO_IRENABLE); | |
801 | mb(); | |
802 | ||
803 | udelay(1); /* chip applies IRCFG on next rising edge of its 8MHz clock */ | |
804 | ||
805 | /* read back settings for validation */ | |
806 | ||
807 | config = inw(iobase+VLSI_PIO_IRENABLE) & IRENABLE_MASK; | |
808 | ||
809 | if (mode == IFF_FIR) | |
810 | config ^= IRENABLE_FIR_ON; | |
811 | else if (mode == IFF_MIR) | |
812 | config ^= (IRENABLE_MIR_ON|IRENABLE_CRC16_ON); | |
813 | else | |
814 | config ^= IRENABLE_SIR_ON; | |
815 | ||
816 | if (config != (IRENABLE_PHYANDCLOCK|IRENABLE_ENRXST)) { | |
6c91023d JP |
817 | net_warn_ratelimited("%s: failed to set %s mode!\n", |
818 | __func__, | |
819 | mode == IFF_SIR ? "SIR" : | |
820 | mode == IFF_MIR ? "MIR" : "FIR"); | |
1da177e4 LT |
821 | ret = -1; |
822 | } | |
823 | else { | |
824 | if (inw(iobase+VLSI_PIO_PHYCTL) != nphyctl) { | |
6c91023d JP |
825 | net_warn_ratelimited("%s: failed to apply baudrate %d\n", |
826 | __func__, baudrate); | |
1da177e4 LT |
827 | ret = -1; |
828 | } | |
829 | else { | |
830 | idev->mode = mode; | |
831 | idev->baud = baudrate; | |
832 | idev->new_baud = 0; | |
833 | ret = 0; | |
834 | } | |
835 | } | |
836 | ||
837 | if (ret) | |
a97a6f10 | 838 | vlsi_reg_debug(iobase,__func__); |
1da177e4 LT |
839 | |
840 | return ret; | |
841 | } | |
842 | ||
6518bbb8 SH |
843 | static netdev_tx_t vlsi_hard_start_xmit(struct sk_buff *skb, |
844 | struct net_device *ndev) | |
1da177e4 | 845 | { |
4cf1653a | 846 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
1da177e4 LT |
847 | struct vlsi_ring *r = idev->tx_ring; |
848 | struct ring_descr *rd; | |
849 | unsigned long flags; | |
850 | unsigned iobase = ndev->base_addr; | |
851 | u8 status; | |
852 | u16 config; | |
497ec1f2 | 853 | int mtt, diff; |
1da177e4 | 854 | int len, speed; |
1da177e4 LT |
855 | char *msg = NULL; |
856 | ||
857 | speed = irda_get_next_speed(skb); | |
858 | spin_lock_irqsave(&idev->lock, flags); | |
859 | if (speed != -1 && speed != idev->baud) { | |
860 | netif_stop_queue(ndev); | |
861 | idev->new_baud = speed; | |
862 | status = RD_TX_CLRENTX; /* stop tx-ring after this frame */ | |
863 | } | |
864 | else | |
865 | status = 0; | |
866 | ||
867 | if (skb->len == 0) { | |
868 | /* handle zero packets - should be speed change */ | |
869 | if (status == 0) { | |
870 | msg = "bogus zero-length packet"; | |
871 | goto drop_unlock; | |
872 | } | |
873 | ||
874 | /* due to the completely asynch tx operation we might have | |
875 | * IrLAP racing with the hardware here, f.e. if the controller | |
876 | * is just sending the last packet with current speed while | |
877 | * the LAP is already switching the speed using synchronous | |
878 | * len=0 packet. Immediate execution would lead to hw lockup | |
879 | * requiring a powercycle to reset. Good candidate to trigger | |
880 | * this is the final UA:RSP packet after receiving a DISC:CMD | |
881 | * when getting the LAP down. | |
882 | * Note that we are not protected by the queue_stop approach | |
883 | * because the final UA:RSP arrives _without_ request to apply | |
884 | * new-speed-after-this-packet - hence the driver doesn't know | |
885 | * this was the last packet and doesn't stop the queue. So the | |
886 | * forced switch to default speed from LAP gets through as fast | |
887 | * as only some 10 usec later while the UA:RSP is still processed | |
888 | * by the hardware and we would get screwed. | |
889 | */ | |
890 | ||
891 | if (ring_first(idev->tx_ring) == NULL) { | |
892 | /* no race - tx-ring already empty */ | |
893 | vlsi_set_baud(idev, iobase); | |
894 | netif_wake_queue(ndev); | |
895 | } | |
896 | else | |
897 | ; | |
898 | /* keep the speed change pending like it would | |
899 | * for any len>0 packet. tx completion interrupt | |
900 | * will apply it when the tx ring becomes empty. | |
901 | */ | |
902 | spin_unlock_irqrestore(&idev->lock, flags); | |
903 | dev_kfree_skb_any(skb); | |
6ed10654 | 904 | return NETDEV_TX_OK; |
1da177e4 LT |
905 | } |
906 | ||
907 | /* sanity checks - simply drop the packet */ | |
908 | ||
909 | rd = ring_last(r); | |
910 | if (!rd) { | |
911 | msg = "ring full, but queue wasn't stopped"; | |
912 | goto drop_unlock; | |
913 | } | |
914 | ||
915 | if (rd_is_active(rd)) { | |
916 | msg = "entry still owned by hw"; | |
917 | goto drop_unlock; | |
918 | } | |
919 | ||
920 | if (!rd->buf) { | |
921 | msg = "tx ring entry without pci buffer"; | |
922 | goto drop_unlock; | |
923 | } | |
924 | ||
925 | if (rd->skb) { | |
926 | msg = "ring entry with old skb still attached"; | |
927 | goto drop_unlock; | |
928 | } | |
929 | ||
930 | /* no need for serialization or interrupt disable during mtt */ | |
931 | spin_unlock_irqrestore(&idev->lock, flags); | |
932 | ||
933 | if ((mtt = irda_get_mtt(skb)) > 0) { | |
497ec1f2 CZ |
934 | diff = ktime_us_delta(ktime_get(), idev->last_rx); |
935 | if (mtt > diff) | |
936 | udelay(mtt - diff); | |
932ff279 | 937 | /* must not sleep here - called under netif_tx_lock! */ |
1da177e4 LT |
938 | } |
939 | ||
940 | /* tx buffer already owned by CPU due to pci_dma_sync_single_for_cpu() | |
941 | * after subsequent tx-completion | |
942 | */ | |
943 | ||
944 | if (idev->mode == IFF_SIR) { | |
945 | status |= RD_TX_DISCRC; /* no hw-crc creation */ | |
946 | len = async_wrap_skb(skb, rd->buf, r->len); | |
947 | ||
948 | /* Some rare worst case situation in SIR mode might lead to | |
949 | * potential buffer overflow. The wrapper detects this, returns | |
950 | * with a shortened frame (without FCS/EOF) but doesn't provide | |
951 | * any error indication about the invalid packet which we are | |
952 | * going to transmit. | |
953 | * Therefore we log if the buffer got filled to the point, where the | |
954 | * wrapper would abort, i.e. when there are less than 5 bytes left to | |
955 | * allow appending the FCS/EOF. | |
956 | */ | |
957 | ||
958 | if (len >= r->len-5) | |
6c91023d JP |
959 | net_warn_ratelimited("%s: possible buffer overflow with SIR wrapping!\n", |
960 | __func__); | |
1da177e4 LT |
961 | } |
962 | else { | |
963 | /* hw deals with MIR/FIR mode wrapping */ | |
964 | status |= RD_TX_PULSE; /* send 2 us highspeed indication pulse */ | |
965 | len = skb->len; | |
966 | if (len > r->len) { | |
967 | msg = "frame exceeds tx buffer length"; | |
968 | goto drop; | |
969 | } | |
970 | else | |
d626f62b | 971 | skb_copy_from_linear_data(skb, rd->buf, len); |
1da177e4 LT |
972 | } |
973 | ||
974 | rd->skb = skb; /* remember skb for tx-complete stats */ | |
975 | ||
976 | rd_set_count(rd, len); | |
977 | rd_set_status(rd, status); /* not yet active! */ | |
978 | ||
979 | /* give dma buffer back to busmaster-hw (flush caches to make | |
980 | * CPU-driven changes visible from the pci bus). | |
981 | */ | |
982 | ||
983 | pci_dma_sync_single_for_device(r->pdev, rd_get_addr(rd), r->len, r->dir); | |
984 | ||
985 | /* Switching to TX mode here races with the controller | |
986 | * which may stop TX at any time when fetching an inactive descriptor | |
987 | * or one with CLR_ENTX set. So we switch on TX only, if TX was not running | |
988 | * _after_ the new descriptor was activated on the ring. This ensures | |
989 | * we will either find TX already stopped or we can be sure, there | |
990 | * will be a TX-complete interrupt even if the chip stopped doing | |
991 | * TX just after we found it still running. The ISR will then find | |
992 | * the non-empty ring and restart TX processing. The enclosing | |
993 | * spinlock provides the correct serialization to prevent race with isr. | |
994 | */ | |
995 | ||
996 | spin_lock_irqsave(&idev->lock,flags); | |
997 | ||
998 | rd_activate(rd); | |
999 | ||
1000 | if (!(inw(iobase+VLSI_PIO_IRENABLE) & IRENABLE_ENTXST)) { | |
1001 | int fifocnt; | |
1002 | ||
1003 | fifocnt = inw(ndev->base_addr+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK; | |
1004 | if (fifocnt != 0) { | |
955a9d20 JP |
1005 | pr_debug("%s: rx fifo not empty(%d)\n", |
1006 | __func__, fifocnt); | |
1da177e4 LT |
1007 | } |
1008 | ||
1009 | config = inw(iobase+VLSI_PIO_IRCFG); | |
1010 | mb(); | |
1011 | outw(config | IRCFG_ENTX, iobase+VLSI_PIO_IRCFG); | |
1012 | wmb(); | |
1013 | outw(0, iobase+VLSI_PIO_PROMPT); | |
1014 | } | |
1da177e4 LT |
1015 | |
1016 | if (ring_put(r) == NULL) { | |
1017 | netif_stop_queue(ndev); | |
955a9d20 | 1018 | pr_debug("%s: tx ring full - queue stopped\n", __func__); |
1da177e4 LT |
1019 | } |
1020 | spin_unlock_irqrestore(&idev->lock, flags); | |
1021 | ||
6ed10654 | 1022 | return NETDEV_TX_OK; |
1da177e4 LT |
1023 | |
1024 | drop_unlock: | |
1025 | spin_unlock_irqrestore(&idev->lock, flags); | |
1026 | drop: | |
6c91023d | 1027 | net_warn_ratelimited("%s: dropping packet - %s\n", __func__, msg); |
1da177e4 | 1028 | dev_kfree_skb_any(skb); |
af049081 SH |
1029 | ndev->stats.tx_errors++; |
1030 | ndev->stats.tx_dropped++; | |
1da177e4 LT |
1031 | /* Don't even think about returning NET_XMIT_DROP (=1) here! |
1032 | * In fact any retval!=0 causes the packet scheduler to requeue the | |
1033 | * packet for later retry of transmission - which isn't exactly | |
1034 | * what we want after we've just called dev_kfree_skb_any ;-) | |
1035 | */ | |
6ed10654 | 1036 | return NETDEV_TX_OK; |
1da177e4 LT |
1037 | } |
1038 | ||
1039 | static void vlsi_tx_interrupt(struct net_device *ndev) | |
1040 | { | |
4cf1653a | 1041 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
1da177e4 LT |
1042 | struct vlsi_ring *r = idev->tx_ring; |
1043 | struct ring_descr *rd; | |
1044 | unsigned iobase; | |
1045 | int ret; | |
1046 | u16 config; | |
1047 | ||
1048 | for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) { | |
1049 | ||
1050 | if (rd_is_active(rd)) | |
1051 | break; | |
1052 | ||
1053 | ret = vlsi_process_tx(r, rd); | |
1054 | ||
1055 | if (ret < 0) { | |
1056 | ret = -ret; | |
af049081 | 1057 | ndev->stats.tx_errors++; |
1da177e4 | 1058 | if (ret & VLSI_TX_DROP) |
af049081 | 1059 | ndev->stats.tx_dropped++; |
1da177e4 | 1060 | if (ret & VLSI_TX_FIFO) |
af049081 | 1061 | ndev->stats.tx_fifo_errors++; |
1da177e4 LT |
1062 | } |
1063 | else if (ret > 0){ | |
af049081 SH |
1064 | ndev->stats.tx_packets++; |
1065 | ndev->stats.tx_bytes += ret; | |
1da177e4 LT |
1066 | } |
1067 | } | |
1068 | ||
1069 | iobase = ndev->base_addr; | |
1070 | ||
1071 | if (idev->new_baud && rd == NULL) /* tx ring empty and speed change pending */ | |
1072 | vlsi_set_baud(idev, iobase); | |
1073 | ||
1074 | config = inw(iobase+VLSI_PIO_IRCFG); | |
1075 | if (rd == NULL) /* tx ring empty: re-enable rx */ | |
1076 | outw((config & ~IRCFG_ENTX) | IRCFG_ENRX, iobase+VLSI_PIO_IRCFG); | |
1077 | ||
1078 | else if (!(inw(iobase+VLSI_PIO_IRENABLE) & IRENABLE_ENTXST)) { | |
1079 | int fifocnt; | |
1080 | ||
1081 | fifocnt = inw(iobase+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK; | |
1082 | if (fifocnt != 0) { | |
955a9d20 JP |
1083 | pr_debug("%s: rx fifo not empty(%d)\n", |
1084 | __func__, fifocnt); | |
1da177e4 LT |
1085 | } |
1086 | outw(config | IRCFG_ENTX, iobase+VLSI_PIO_IRCFG); | |
1087 | } | |
1088 | ||
1089 | outw(0, iobase+VLSI_PIO_PROMPT); | |
1090 | ||
1091 | if (netif_queue_stopped(ndev) && !idev->new_baud) { | |
1092 | netif_wake_queue(ndev); | |
955a9d20 | 1093 | pr_debug("%s: queue awoken\n", __func__); |
1da177e4 LT |
1094 | } |
1095 | } | |
1096 | ||
1097 | /* caller must have stopped the controller from busmastering */ | |
1098 | ||
1099 | static void vlsi_unarm_tx(vlsi_irda_dev_t *idev) | |
1100 | { | |
af049081 | 1101 | struct net_device *ndev = pci_get_drvdata(idev->pdev); |
1da177e4 LT |
1102 | struct vlsi_ring *r = idev->tx_ring; |
1103 | struct ring_descr *rd; | |
1104 | int ret; | |
1105 | ||
1106 | for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) { | |
1107 | ||
1108 | ret = 0; | |
1109 | if (rd_is_active(rd)) { | |
1110 | rd_set_status(rd, 0); | |
1111 | rd_set_count(rd, 0); | |
1112 | pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir); | |
1113 | if (rd->skb) { | |
1114 | dev_kfree_skb_any(rd->skb); | |
1115 | rd->skb = NULL; | |
1116 | } | |
955a9d20 | 1117 | pr_debug("%s - dropping tx packet\n", __func__); |
1da177e4 LT |
1118 | ret = -VLSI_TX_DROP; |
1119 | } | |
1120 | else | |
1121 | ret = vlsi_process_tx(r, rd); | |
1122 | ||
1123 | if (ret < 0) { | |
1124 | ret = -ret; | |
af049081 | 1125 | ndev->stats.tx_errors++; |
1da177e4 | 1126 | if (ret & VLSI_TX_DROP) |
af049081 | 1127 | ndev->stats.tx_dropped++; |
1da177e4 | 1128 | if (ret & VLSI_TX_FIFO) |
af049081 | 1129 | ndev->stats.tx_fifo_errors++; |
1da177e4 LT |
1130 | } |
1131 | else if (ret > 0){ | |
af049081 SH |
1132 | ndev->stats.tx_packets++; |
1133 | ndev->stats.tx_bytes += ret; | |
1da177e4 LT |
1134 | } |
1135 | } | |
1136 | ||
1137 | } | |
1138 | ||
1139 | /********************************************************/ | |
1140 | ||
1141 | static int vlsi_start_clock(struct pci_dev *pdev) | |
1142 | { | |
1143 | u8 clkctl, lock; | |
1144 | int i, count; | |
1145 | ||
1146 | if (clksrc < 2) { /* auto or PLL: try PLL */ | |
1147 | clkctl = CLKCTL_PD_INV | CLKCTL_CLKSTP; | |
1148 | pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl); | |
1149 | ||
1150 | /* procedure to detect PLL lock synchronisation: | |
1151 | * after 0.5 msec initial delay we expect to find 3 PLL lock | |
1152 | * indications within 10 msec for successful PLL detection. | |
1153 | */ | |
1154 | udelay(500); | |
1155 | count = 0; | |
1156 | for (i = 500; i <= 10000; i += 50) { /* max 10 msec */ | |
1157 | pci_read_config_byte(pdev, VLSI_PCI_CLKCTL, &lock); | |
1158 | if (lock&CLKCTL_LOCK) { | |
1159 | if (++count >= 3) | |
1160 | break; | |
1161 | } | |
1162 | udelay(50); | |
1163 | } | |
1164 | if (count < 3) { | |
1165 | if (clksrc == 1) { /* explicitly asked for PLL hence bail out */ | |
6c91023d JP |
1166 | net_err_ratelimited("%s: no PLL or failed to lock!\n", |
1167 | __func__); | |
1da177e4 LT |
1168 | clkctl = CLKCTL_CLKSTP; |
1169 | pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl); | |
1170 | return -1; | |
1171 | } | |
1172 | else /* was: clksrc=0(auto) */ | |
1173 | clksrc = 3; /* fallback to 40MHz XCLK (OB800) */ | |
1174 | ||
955a9d20 JP |
1175 | pr_debug("%s: PLL not locked, fallback to clksrc=%d\n", |
1176 | __func__, clksrc); | |
1da177e4 LT |
1177 | } |
1178 | else | |
1179 | clksrc = 1; /* got successful PLL lock */ | |
1180 | } | |
1181 | ||
1182 | if (clksrc != 1) { | |
1183 | /* we get here if either no PLL detected in auto-mode or | |
1184 | an external clock source was explicitly specified */ | |
1185 | ||
1186 | clkctl = CLKCTL_EXTCLK | CLKCTL_CLKSTP; | |
1187 | if (clksrc == 3) | |
1188 | clkctl |= CLKCTL_XCKSEL; | |
1189 | pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl); | |
1190 | ||
1191 | /* no way to test for working XCLK */ | |
1192 | } | |
1193 | else | |
1194 | pci_read_config_byte(pdev, VLSI_PCI_CLKCTL, &clkctl); | |
1195 | ||
1196 | /* ok, now going to connect the chip with the clock source */ | |
1197 | ||
1198 | clkctl &= ~CLKCTL_CLKSTP; | |
1199 | pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl); | |
1200 | ||
1201 | return 0; | |
1202 | } | |
1203 | ||
1204 | static void vlsi_stop_clock(struct pci_dev *pdev) | |
1205 | { | |
1206 | u8 clkctl; | |
1207 | ||
1208 | /* disconnect chip from clock source */ | |
1209 | pci_read_config_byte(pdev, VLSI_PCI_CLKCTL, &clkctl); | |
1210 | clkctl |= CLKCTL_CLKSTP; | |
1211 | pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl); | |
1212 | ||
1213 | /* disable all clock sources */ | |
1214 | clkctl &= ~(CLKCTL_EXTCLK | CLKCTL_PD_INV); | |
1215 | pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl); | |
1216 | } | |
1217 | ||
1218 | /********************************************************/ | |
1219 | ||
1220 | /* writing all-zero to the VLSI PCI IO register area seems to prevent | |
1221 | * some occasional situations where the hardware fails (symptoms are | |
1222 | * what appears as stalled tx/rx state machines, i.e. everything ok for | |
1223 | * receive or transmit but hw makes no progress or is unable to access | |
1224 | * the bus memory locations). | |
1225 | * Best place to call this is immediately after/before the internal clock | |
1226 | * gets started/stopped. | |
1227 | */ | |
1228 | ||
1229 | static inline void vlsi_clear_regs(unsigned iobase) | |
1230 | { | |
1231 | unsigned i; | |
1232 | const unsigned chip_io_extent = 32; | |
1233 | ||
1234 | for (i = 0; i < chip_io_extent; i += sizeof(u16)) | |
1235 | outw(0, iobase + i); | |
1236 | } | |
1237 | ||
1238 | static int vlsi_init_chip(struct pci_dev *pdev) | |
1239 | { | |
1240 | struct net_device *ndev = pci_get_drvdata(pdev); | |
4cf1653a | 1241 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
1da177e4 LT |
1242 | unsigned iobase; |
1243 | u16 ptr; | |
1244 | ||
1245 | /* start the clock and clean the registers */ | |
1246 | ||
1247 | if (vlsi_start_clock(pdev)) { | |
6c91023d | 1248 | net_err_ratelimited("%s: no valid clock source\n", __func__); |
1da177e4 LT |
1249 | return -1; |
1250 | } | |
1251 | iobase = ndev->base_addr; | |
1252 | vlsi_clear_regs(iobase); | |
1253 | ||
1254 | outb(IRINTR_INT_MASK, iobase+VLSI_PIO_IRINTR); /* w/c pending IRQ, disable all INT */ | |
1255 | ||
1256 | outw(0, iobase+VLSI_PIO_IRENABLE); /* disable IrPHY-interface */ | |
1257 | ||
1258 | /* disable everything, particularly IRCFG_MSTR - (also resetting the RING_PTR) */ | |
1259 | ||
1260 | outw(0, iobase+VLSI_PIO_IRCFG); | |
1261 | wmb(); | |
1262 | ||
1263 | outw(MAX_PACKET_LENGTH, iobase+VLSI_PIO_MAXPKT); /* max possible value=0x0fff */ | |
1264 | ||
1265 | outw(BUS_TO_RINGBASE(idev->busaddr), iobase+VLSI_PIO_RINGBASE); | |
1266 | ||
1267 | outw(TX_RX_TO_RINGSIZE(idev->tx_ring->size, idev->rx_ring->size), | |
1268 | iobase+VLSI_PIO_RINGSIZE); | |
1269 | ||
1270 | ptr = inw(iobase+VLSI_PIO_RINGPTR); | |
1271 | atomic_set(&idev->rx_ring->head, RINGPTR_GET_RX(ptr)); | |
1272 | atomic_set(&idev->rx_ring->tail, RINGPTR_GET_RX(ptr)); | |
1273 | atomic_set(&idev->tx_ring->head, RINGPTR_GET_TX(ptr)); | |
1274 | atomic_set(&idev->tx_ring->tail, RINGPTR_GET_TX(ptr)); | |
1275 | ||
1276 | vlsi_set_baud(idev, iobase); /* idev->new_baud used as provided by caller */ | |
1277 | ||
1278 | outb(IRINTR_INT_MASK, iobase+VLSI_PIO_IRINTR); /* just in case - w/c pending IRQ's */ | |
1279 | wmb(); | |
1280 | ||
1281 | /* DO NOT BLINDLY ENABLE IRINTR_ACTEN! | |
1282 | * basically every received pulse fires an ACTIVITY-INT | |
1283 | * leading to >>1000 INT's per second instead of few 10 | |
1284 | */ | |
1285 | ||
1286 | outb(IRINTR_RPKTEN|IRINTR_TPKTEN, iobase+VLSI_PIO_IRINTR); | |
1287 | ||
1288 | return 0; | |
1289 | } | |
1290 | ||
1291 | static int vlsi_start_hw(vlsi_irda_dev_t *idev) | |
1292 | { | |
1293 | struct pci_dev *pdev = idev->pdev; | |
1294 | struct net_device *ndev = pci_get_drvdata(pdev); | |
1295 | unsigned iobase = ndev->base_addr; | |
1296 | u8 byte; | |
1297 | ||
1298 | /* we don't use the legacy UART, disable its address decoding */ | |
1299 | ||
1300 | pci_read_config_byte(pdev, VLSI_PCI_IRMISC, &byte); | |
1301 | byte &= ~(IRMISC_UARTEN | IRMISC_UARTTST); | |
1302 | pci_write_config_byte(pdev, VLSI_PCI_IRMISC, byte); | |
1303 | ||
1304 | /* enable PCI busmaster access to our 16MB page */ | |
1305 | ||
1306 | pci_write_config_byte(pdev, VLSI_PCI_MSTRPAGE, MSTRPAGE_VALUE); | |
1307 | pci_set_master(pdev); | |
1308 | ||
1309 | if (vlsi_init_chip(pdev) < 0) { | |
1310 | pci_disable_device(pdev); | |
1311 | return -1; | |
1312 | } | |
1313 | ||
1314 | vlsi_fill_rx(idev->rx_ring); | |
1315 | ||
497ec1f2 | 1316 | idev->last_rx = ktime_get(); /* first mtt may start from now on */ |
1da177e4 LT |
1317 | |
1318 | outw(0, iobase+VLSI_PIO_PROMPT); /* kick hw state machine */ | |
1319 | ||
1320 | return 0; | |
1321 | } | |
1322 | ||
1323 | static int vlsi_stop_hw(vlsi_irda_dev_t *idev) | |
1324 | { | |
1325 | struct pci_dev *pdev = idev->pdev; | |
1326 | struct net_device *ndev = pci_get_drvdata(pdev); | |
1327 | unsigned iobase = ndev->base_addr; | |
1328 | unsigned long flags; | |
1329 | ||
1330 | spin_lock_irqsave(&idev->lock,flags); | |
1331 | outw(0, iobase+VLSI_PIO_IRENABLE); | |
1332 | outw(0, iobase+VLSI_PIO_IRCFG); /* disable everything */ | |
1333 | ||
1334 | /* disable and w/c irqs */ | |
1335 | outb(0, iobase+VLSI_PIO_IRINTR); | |
1336 | wmb(); | |
1337 | outb(IRINTR_INT_MASK, iobase+VLSI_PIO_IRINTR); | |
1338 | spin_unlock_irqrestore(&idev->lock,flags); | |
1339 | ||
1340 | vlsi_unarm_tx(idev); | |
1341 | vlsi_unarm_rx(idev); | |
1342 | ||
1343 | vlsi_clear_regs(iobase); | |
1344 | vlsi_stop_clock(pdev); | |
1345 | ||
1346 | pci_disable_device(pdev); | |
1347 | ||
1348 | return 0; | |
1349 | } | |
1350 | ||
1351 | /**************************************************************/ | |
1352 | ||
1da177e4 LT |
1353 | static void vlsi_tx_timeout(struct net_device *ndev) |
1354 | { | |
4cf1653a | 1355 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
1da177e4 LT |
1356 | |
1357 | ||
a97a6f10 | 1358 | vlsi_reg_debug(ndev->base_addr, __func__); |
1da177e4 LT |
1359 | vlsi_ring_debug(idev->tx_ring); |
1360 | ||
1361 | if (netif_running(ndev)) | |
1362 | netif_stop_queue(ndev); | |
1363 | ||
1364 | vlsi_stop_hw(idev); | |
1365 | ||
1366 | /* now simply restart the whole thing */ | |
1367 | ||
1368 | if (!idev->new_baud) | |
1369 | idev->new_baud = idev->baud; /* keep current baudrate */ | |
1370 | ||
1371 | if (vlsi_start_hw(idev)) | |
6c91023d JP |
1372 | net_err_ratelimited("%s: failed to restart hw - %s(%s) unusable!\n", |
1373 | __func__, pci_name(idev->pdev), ndev->name); | |
1da177e4 LT |
1374 | else |
1375 | netif_start_queue(ndev); | |
1376 | } | |
1377 | ||
1378 | static int vlsi_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd) | |
1379 | { | |
4cf1653a | 1380 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
1da177e4 LT |
1381 | struct if_irda_req *irq = (struct if_irda_req *) rq; |
1382 | unsigned long flags; | |
1383 | u16 fifocnt; | |
1384 | int ret = 0; | |
1385 | ||
1386 | switch (cmd) { | |
1387 | case SIOCSBANDWIDTH: | |
1388 | if (!capable(CAP_NET_ADMIN)) { | |
1389 | ret = -EPERM; | |
1390 | break; | |
1391 | } | |
1392 | spin_lock_irqsave(&idev->lock, flags); | |
1393 | idev->new_baud = irq->ifr_baudrate; | |
1394 | /* when called from userland there might be a minor race window here | |
1395 | * if the stack tries to change speed concurrently - which would be | |
1396 | * pretty strange anyway with the userland having full control... | |
1397 | */ | |
1398 | vlsi_set_baud(idev, ndev->base_addr); | |
1399 | spin_unlock_irqrestore(&idev->lock, flags); | |
1400 | break; | |
1401 | case SIOCSMEDIABUSY: | |
1402 | if (!capable(CAP_NET_ADMIN)) { | |
1403 | ret = -EPERM; | |
1404 | break; | |
1405 | } | |
1406 | irda_device_set_media_busy(ndev, TRUE); | |
1407 | break; | |
1408 | case SIOCGRECEIVING: | |
1409 | /* the best we can do: check whether there are any bytes in rx fifo. | |
1410 | * The trustable window (in case some data arrives just afterwards) | |
1411 | * may be as short as 1usec or so at 4Mbps. | |
1412 | */ | |
1413 | fifocnt = inw(ndev->base_addr+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK; | |
1414 | irq->ifr_receiving = (fifocnt!=0) ? 1 : 0; | |
1415 | break; | |
1416 | default: | |
6c91023d JP |
1417 | net_warn_ratelimited("%s: notsupp - cmd=%04x\n", |
1418 | __func__, cmd); | |
1da177e4 LT |
1419 | ret = -EOPNOTSUPP; |
1420 | } | |
1421 | ||
1422 | return ret; | |
1423 | } | |
1424 | ||
1425 | /********************************************************/ | |
1426 | ||
7d12e780 | 1427 | static irqreturn_t vlsi_interrupt(int irq, void *dev_instance) |
1da177e4 LT |
1428 | { |
1429 | struct net_device *ndev = dev_instance; | |
4cf1653a | 1430 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
1da177e4 LT |
1431 | unsigned iobase; |
1432 | u8 irintr; | |
1433 | int boguscount = 5; | |
1434 | unsigned long flags; | |
1435 | int handled = 0; | |
1436 | ||
1437 | iobase = ndev->base_addr; | |
1438 | spin_lock_irqsave(&idev->lock,flags); | |
1439 | do { | |
1440 | irintr = inb(iobase+VLSI_PIO_IRINTR); | |
1441 | mb(); | |
1442 | outb(irintr, iobase+VLSI_PIO_IRINTR); /* acknowledge asap */ | |
1443 | ||
1444 | if (!(irintr&=IRINTR_INT_MASK)) /* not our INT - probably shared */ | |
1445 | break; | |
1446 | ||
1447 | handled = 1; | |
1448 | ||
1449 | if (unlikely(!(irintr & ~IRINTR_ACTIVITY))) | |
1450 | break; /* nothing todo if only activity */ | |
1451 | ||
1452 | if (irintr&IRINTR_RPKTINT) | |
1453 | vlsi_rx_interrupt(ndev); | |
1454 | ||
1455 | if (irintr&IRINTR_TPKTINT) | |
1456 | vlsi_tx_interrupt(ndev); | |
1457 | ||
1458 | } while (--boguscount > 0); | |
1459 | spin_unlock_irqrestore(&idev->lock,flags); | |
1460 | ||
1461 | if (boguscount <= 0) | |
6c91023d JP |
1462 | net_info_ratelimited("%s: too much work in interrupt!\n", |
1463 | __func__); | |
1da177e4 LT |
1464 | return IRQ_RETVAL(handled); |
1465 | } | |
1466 | ||
1467 | /********************************************************/ | |
1468 | ||
1469 | static int vlsi_open(struct net_device *ndev) | |
1470 | { | |
4cf1653a | 1471 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
1da177e4 LT |
1472 | int err = -EAGAIN; |
1473 | char hwname[32]; | |
1474 | ||
1475 | if (pci_request_regions(idev->pdev, drivername)) { | |
6c91023d | 1476 | net_warn_ratelimited("%s: io resource busy\n", __func__); |
1da177e4 LT |
1477 | goto errout; |
1478 | } | |
1479 | ndev->base_addr = pci_resource_start(idev->pdev,0); | |
1480 | ndev->irq = idev->pdev->irq; | |
1481 | ||
1482 | /* under some rare occasions the chip apparently comes up with | |
1483 | * IRQ's pending. We better w/c pending IRQ and disable them all | |
1484 | */ | |
1485 | ||
1486 | outb(IRINTR_INT_MASK, ndev->base_addr+VLSI_PIO_IRINTR); | |
1487 | ||
1fb9df5d | 1488 | if (request_irq(ndev->irq, vlsi_interrupt, IRQF_SHARED, |
1da177e4 | 1489 | drivername, ndev)) { |
6c91023d JP |
1490 | net_warn_ratelimited("%s: couldn't get IRQ: %d\n", |
1491 | __func__, ndev->irq); | |
1da177e4 LT |
1492 | goto errout_io; |
1493 | } | |
1494 | ||
1495 | if ((err = vlsi_create_hwif(idev)) != 0) | |
1496 | goto errout_irq; | |
1497 | ||
1498 | sprintf(hwname, "VLSI-FIR @ 0x%04x", (unsigned)ndev->base_addr); | |
1499 | idev->irlap = irlap_open(ndev,&idev->qos,hwname); | |
1500 | if (!idev->irlap) | |
1501 | goto errout_free_ring; | |
1502 | ||
497ec1f2 | 1503 | idev->last_rx = ktime_get(); /* first mtt may start from now on */ |
1da177e4 LT |
1504 | |
1505 | idev->new_baud = 9600; /* start with IrPHY using 9600(SIR) mode */ | |
1506 | ||
1507 | if ((err = vlsi_start_hw(idev)) != 0) | |
1508 | goto errout_close_irlap; | |
1509 | ||
1510 | netif_start_queue(ndev); | |
1511 | ||
6c91023d JP |
1512 | net_info_ratelimited("%s: device %s operational\n", |
1513 | __func__, ndev->name); | |
1da177e4 LT |
1514 | |
1515 | return 0; | |
1516 | ||
1517 | errout_close_irlap: | |
1518 | irlap_close(idev->irlap); | |
1519 | errout_free_ring: | |
1520 | vlsi_destroy_hwif(idev); | |
1521 | errout_irq: | |
1522 | free_irq(ndev->irq,ndev); | |
1523 | errout_io: | |
1524 | pci_release_regions(idev->pdev); | |
1525 | errout: | |
1526 | return err; | |
1527 | } | |
1528 | ||
1529 | static int vlsi_close(struct net_device *ndev) | |
1530 | { | |
4cf1653a | 1531 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
1da177e4 LT |
1532 | |
1533 | netif_stop_queue(ndev); | |
1534 | ||
1535 | if (idev->irlap) | |
1536 | irlap_close(idev->irlap); | |
1537 | idev->irlap = NULL; | |
1538 | ||
1539 | vlsi_stop_hw(idev); | |
1540 | ||
1541 | vlsi_destroy_hwif(idev); | |
1542 | ||
1543 | free_irq(ndev->irq,ndev); | |
1544 | ||
1545 | pci_release_regions(idev->pdev); | |
1546 | ||
6c91023d | 1547 | net_info_ratelimited("%s: device %s stopped\n", __func__, ndev->name); |
1da177e4 LT |
1548 | |
1549 | return 0; | |
1550 | } | |
1551 | ||
30a5d7f7 SH |
1552 | static const struct net_device_ops vlsi_netdev_ops = { |
1553 | .ndo_open = vlsi_open, | |
1554 | .ndo_stop = vlsi_close, | |
1555 | .ndo_start_xmit = vlsi_hard_start_xmit, | |
1556 | .ndo_do_ioctl = vlsi_ioctl, | |
1557 | .ndo_tx_timeout = vlsi_tx_timeout, | |
1558 | }; | |
1559 | ||
1da177e4 LT |
1560 | static int vlsi_irda_init(struct net_device *ndev) |
1561 | { | |
4cf1653a | 1562 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
1da177e4 LT |
1563 | struct pci_dev *pdev = idev->pdev; |
1564 | ||
1da177e4 LT |
1565 | ndev->irq = pdev->irq; |
1566 | ndev->base_addr = pci_resource_start(pdev,0); | |
1567 | ||
1568 | /* PCI busmastering | |
1569 | * see include file for details why we need these 2 masks, in this order! | |
1570 | */ | |
1571 | ||
8e95a202 JP |
1572 | if (pci_set_dma_mask(pdev,DMA_MASK_USED_BY_HW) || |
1573 | pci_set_dma_mask(pdev,DMA_MASK_MSTRPAGE)) { | |
6c91023d JP |
1574 | net_err_ratelimited("%s: aborting due to PCI BM-DMA address limitations\n", |
1575 | __func__); | |
1da177e4 LT |
1576 | return -1; |
1577 | } | |
1578 | ||
1579 | irda_init_max_qos_capabilies(&idev->qos); | |
1580 | ||
1581 | /* the VLSI82C147 does not support 576000! */ | |
1582 | ||
1583 | idev->qos.baud_rate.bits = IR_2400 | IR_9600 | |
1584 | | IR_19200 | IR_38400 | IR_57600 | IR_115200 | |
1585 | | IR_1152000 | (IR_4000000 << 8); | |
1586 | ||
1587 | idev->qos.min_turn_time.bits = qos_mtt_bits; | |
1588 | ||
1589 | irda_qos_bits_to_value(&idev->qos); | |
1590 | ||
1591 | /* currently no public media definitions for IrDA */ | |
1592 | ||
1593 | ndev->flags |= IFF_PORTSEL | IFF_AUTOMEDIA; | |
1594 | ndev->if_port = IF_PORT_UNKNOWN; | |
1595 | ||
30a5d7f7 | 1596 | ndev->netdev_ops = &vlsi_netdev_ops; |
1da177e4 LT |
1597 | ndev->watchdog_timeo = 500*HZ/1000; /* max. allowed turn time for IrLAP */ |
1598 | ||
1599 | SET_NETDEV_DEV(ndev, &pdev->dev); | |
1600 | ||
1601 | return 0; | |
1602 | } | |
1603 | ||
1604 | /**************************************************************/ | |
1605 | ||
45ac936c | 1606 | static int |
1da177e4 LT |
1607 | vlsi_irda_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
1608 | { | |
1609 | struct net_device *ndev; | |
1610 | vlsi_irda_dev_t *idev; | |
1611 | ||
1612 | if (pci_enable_device(pdev)) | |
1613 | goto out; | |
1614 | else | |
1615 | pdev->current_state = 0; /* hw must be running now */ | |
1616 | ||
6c91023d JP |
1617 | net_info_ratelimited("%s: IrDA PCI controller %s detected\n", |
1618 | drivername, pci_name(pdev)); | |
1da177e4 | 1619 | |
8e95a202 JP |
1620 | if ( !pci_resource_start(pdev,0) || |
1621 | !(pci_resource_flags(pdev,0) & IORESOURCE_IO) ) { | |
6c91023d | 1622 | net_err_ratelimited("%s: bar 0 invalid", __func__); |
1da177e4 LT |
1623 | goto out_disable; |
1624 | } | |
1625 | ||
1626 | ndev = alloc_irdadev(sizeof(*idev)); | |
1627 | if (ndev==NULL) { | |
6c91023d JP |
1628 | net_err_ratelimited("%s: Unable to allocate device memory.\n", |
1629 | __func__); | |
1da177e4 LT |
1630 | goto out_disable; |
1631 | } | |
1632 | ||
4cf1653a | 1633 | idev = netdev_priv(ndev); |
1da177e4 LT |
1634 | |
1635 | spin_lock_init(&idev->lock); | |
aa429110 MK |
1636 | mutex_init(&idev->mtx); |
1637 | mutex_lock(&idev->mtx); | |
1da177e4 LT |
1638 | idev->pdev = pdev; |
1639 | ||
1640 | if (vlsi_irda_init(ndev) < 0) | |
1641 | goto out_freedev; | |
1642 | ||
1643 | if (register_netdev(ndev) < 0) { | |
6c91023d | 1644 | net_err_ratelimited("%s: register_netdev failed\n", __func__); |
1da177e4 LT |
1645 | goto out_freedev; |
1646 | } | |
1647 | ||
1648 | if (vlsi_proc_root != NULL) { | |
1649 | struct proc_dir_entry *ent; | |
1650 | ||
a95609cb DL |
1651 | ent = proc_create_data(ndev->name, S_IFREG|S_IRUGO, |
1652 | vlsi_proc_root, VLSI_PROC_FOPS, ndev); | |
1da177e4 | 1653 | if (!ent) { |
6c91023d JP |
1654 | net_warn_ratelimited("%s: failed to create proc entry\n", |
1655 | __func__); | |
1da177e4 | 1656 | } else { |
271a15ea | 1657 | proc_set_size(ent, 0); |
1da177e4 LT |
1658 | } |
1659 | idev->proc_entry = ent; | |
1660 | } | |
6c91023d JP |
1661 | net_info_ratelimited("%s: registered device %s\n", |
1662 | drivername, ndev->name); | |
1da177e4 LT |
1663 | |
1664 | pci_set_drvdata(pdev, ndev); | |
aa429110 | 1665 | mutex_unlock(&idev->mtx); |
1da177e4 LT |
1666 | |
1667 | return 0; | |
1668 | ||
1669 | out_freedev: | |
aa429110 | 1670 | mutex_unlock(&idev->mtx); |
1da177e4 LT |
1671 | free_netdev(ndev); |
1672 | out_disable: | |
1673 | pci_disable_device(pdev); | |
1674 | out: | |
1da177e4 LT |
1675 | return -ENODEV; |
1676 | } | |
1677 | ||
45ac936c | 1678 | static void vlsi_irda_remove(struct pci_dev *pdev) |
1da177e4 LT |
1679 | { |
1680 | struct net_device *ndev = pci_get_drvdata(pdev); | |
1681 | vlsi_irda_dev_t *idev; | |
1682 | ||
1683 | if (!ndev) { | |
6c91023d | 1684 | net_err_ratelimited("%s: lost netdevice?\n", drivername); |
1da177e4 LT |
1685 | return; |
1686 | } | |
1687 | ||
1688 | unregister_netdev(ndev); | |
1689 | ||
4cf1653a | 1690 | idev = netdev_priv(ndev); |
aa429110 | 1691 | mutex_lock(&idev->mtx); |
1da177e4 LT |
1692 | if (idev->proc_entry) { |
1693 | remove_proc_entry(ndev->name, vlsi_proc_root); | |
1694 | idev->proc_entry = NULL; | |
1695 | } | |
aa429110 | 1696 | mutex_unlock(&idev->mtx); |
1da177e4 LT |
1697 | |
1698 | free_netdev(ndev); | |
1699 | ||
6c91023d | 1700 | net_info_ratelimited("%s: %s removed\n", drivername, pci_name(pdev)); |
1da177e4 LT |
1701 | } |
1702 | ||
1703 | #ifdef CONFIG_PM | |
1704 | ||
1705 | /* The Controller doesn't provide PCI PM capabilities as defined by PCI specs. | |
1706 | * Some of the Linux PCI-PM code however depends on this, for example in | |
1707 | * pci_set_power_state(). So we have to take care to perform the required | |
1708 | * operations on our own (particularly reflecting the pdev->current_state) | |
1709 | * otherwise we might get cheated by pci-pm. | |
1710 | */ | |
1711 | ||
1712 | ||
05adc3b7 | 1713 | static int vlsi_irda_suspend(struct pci_dev *pdev, pm_message_t state) |
1da177e4 LT |
1714 | { |
1715 | struct net_device *ndev = pci_get_drvdata(pdev); | |
1716 | vlsi_irda_dev_t *idev; | |
1717 | ||
1da177e4 | 1718 | if (!ndev) { |
6c91023d JP |
1719 | net_err_ratelimited("%s - %s: no netdevice\n", |
1720 | __func__, pci_name(pdev)); | |
1da177e4 LT |
1721 | return 0; |
1722 | } | |
4cf1653a | 1723 | idev = netdev_priv(ndev); |
aa429110 | 1724 | mutex_lock(&idev->mtx); |
1da177e4 | 1725 | if (pdev->current_state != 0) { /* already suspended */ |
ca078bae PM |
1726 | if (state.event > pdev->current_state) { /* simply go deeper */ |
1727 | pci_set_power_state(pdev, pci_choose_state(pdev, state)); | |
1728 | pdev->current_state = state.event; | |
1da177e4 LT |
1729 | } |
1730 | else | |
6c91023d JP |
1731 | net_err_ratelimited("%s - %s: invalid suspend request %u -> %u\n", |
1732 | __func__, pci_name(pdev), | |
1733 | pdev->current_state, state.event); | |
aa429110 | 1734 | mutex_unlock(&idev->mtx); |
1da177e4 LT |
1735 | return 0; |
1736 | } | |
1737 | ||
1738 | if (netif_running(ndev)) { | |
1739 | netif_device_detach(ndev); | |
1740 | vlsi_stop_hw(idev); | |
1741 | pci_save_state(pdev); | |
1742 | if (!idev->new_baud) | |
1743 | /* remember speed settings to restore on resume */ | |
1744 | idev->new_baud = idev->baud; | |
1745 | } | |
1746 | ||
829ca9a3 | 1747 | pci_set_power_state(pdev, pci_choose_state(pdev, state)); |
ca078bae | 1748 | pdev->current_state = state.event; |
1da177e4 | 1749 | idev->resume_ok = 1; |
aa429110 | 1750 | mutex_unlock(&idev->mtx); |
1da177e4 LT |
1751 | return 0; |
1752 | } | |
1753 | ||
1754 | static int vlsi_irda_resume(struct pci_dev *pdev) | |
1755 | { | |
1756 | struct net_device *ndev = pci_get_drvdata(pdev); | |
1757 | vlsi_irda_dev_t *idev; | |
1758 | ||
1759 | if (!ndev) { | |
6c91023d JP |
1760 | net_err_ratelimited("%s - %s: no netdevice\n", |
1761 | __func__, pci_name(pdev)); | |
1da177e4 LT |
1762 | return 0; |
1763 | } | |
4cf1653a | 1764 | idev = netdev_priv(ndev); |
aa429110 | 1765 | mutex_lock(&idev->mtx); |
1da177e4 | 1766 | if (pdev->current_state == 0) { |
aa429110 | 1767 | mutex_unlock(&idev->mtx); |
6c91023d JP |
1768 | net_warn_ratelimited("%s - %s: already resumed\n", |
1769 | __func__, pci_name(pdev)); | |
1da177e4 LT |
1770 | return 0; |
1771 | } | |
1772 | ||
829ca9a3 PM |
1773 | pci_set_power_state(pdev, PCI_D0); |
1774 | pdev->current_state = PM_EVENT_ON; | |
1da177e4 LT |
1775 | |
1776 | if (!idev->resume_ok) { | |
1777 | /* should be obsolete now - but used to happen due to: | |
1778 | * - pci layer initially setting pdev->current_state = 4 (unknown) | |
1779 | * - pci layer did not walk the save_state-tree (might be APM problem) | |
1780 | * so we could not refuse to suspend from undefined state | |
1781 | * - vlsi_irda_suspend detected invalid state and refused to save | |
1782 | * configuration for resume - but was too late to stop suspending | |
1783 | * - vlsi_irda_resume got screwed when trying to resume from garbage | |
1784 | * | |
1785 | * now we explicitly set pdev->current_state = 0 after enabling the | |
1786 | * device and independently resume_ok should catch any garbage config. | |
1787 | */ | |
6c91023d | 1788 | net_warn_ratelimited("%s - hm, nothing to resume?\n", __func__); |
aa429110 | 1789 | mutex_unlock(&idev->mtx); |
1da177e4 LT |
1790 | return 0; |
1791 | } | |
1792 | ||
1793 | if (netif_running(ndev)) { | |
1794 | pci_restore_state(pdev); | |
1795 | vlsi_start_hw(idev); | |
1796 | netif_device_attach(ndev); | |
1797 | } | |
1798 | idev->resume_ok = 0; | |
aa429110 | 1799 | mutex_unlock(&idev->mtx); |
1da177e4 LT |
1800 | return 0; |
1801 | } | |
1802 | ||
1803 | #endif /* CONFIG_PM */ | |
1804 | ||
1805 | /*********************************************************/ | |
1806 | ||
1807 | static struct pci_driver vlsi_irda_driver = { | |
1808 | .name = drivername, | |
1809 | .id_table = vlsi_irda_table, | |
1810 | .probe = vlsi_irda_probe, | |
45ac936c | 1811 | .remove = vlsi_irda_remove, |
1da177e4 LT |
1812 | #ifdef CONFIG_PM |
1813 | .suspend = vlsi_irda_suspend, | |
1814 | .resume = vlsi_irda_resume, | |
1815 | #endif | |
1816 | }; | |
1817 | ||
1818 | #define PROC_DIR ("driver/" DRIVER_NAME) | |
1819 | ||
1820 | static int __init vlsi_mod_init(void) | |
1821 | { | |
1822 | int i, ret; | |
1823 | ||
1824 | if (clksrc < 0 || clksrc > 3) { | |
6c91023d JP |
1825 | net_err_ratelimited("%s: invalid clksrc=%d\n", |
1826 | drivername, clksrc); | |
1da177e4 LT |
1827 | return -1; |
1828 | } | |
1829 | ||
1830 | for (i = 0; i < 2; i++) { | |
1831 | switch(ringsize[i]) { | |
1832 | case 4: | |
1833 | case 8: | |
1834 | case 16: | |
1835 | case 32: | |
1836 | case 64: | |
1837 | break; | |
1838 | default: | |
6c91023d JP |
1839 | net_warn_ratelimited("%s: invalid %s ringsize %d, using default=8\n", |
1840 | drivername, | |
1841 | i ? "rx" : "tx", | |
1842 | ringsize[i]); | |
1da177e4 LT |
1843 | ringsize[i] = 8; |
1844 | break; | |
1845 | } | |
1846 | } | |
1847 | ||
1848 | sirpulse = !!sirpulse; | |
1849 | ||
66600221 | 1850 | /* proc_mkdir returns NULL if !CONFIG_PROC_FS. |
1da177e4 LT |
1851 | * Failure to create the procfs entry is handled like running |
1852 | * without procfs - it's not required for the driver to work. | |
1853 | */ | |
66600221 | 1854 | vlsi_proc_root = proc_mkdir(PROC_DIR, NULL); |
1da177e4 | 1855 | |
a85d771e | 1856 | ret = pci_register_driver(&vlsi_irda_driver); |
1da177e4 LT |
1857 | |
1858 | if (ret && vlsi_proc_root) | |
1859 | remove_proc_entry(PROC_DIR, NULL); | |
1860 | return ret; | |
1861 | ||
1862 | } | |
1863 | ||
1864 | static void __exit vlsi_mod_exit(void) | |
1865 | { | |
1866 | pci_unregister_driver(&vlsi_irda_driver); | |
1867 | if (vlsi_proc_root) | |
1868 | remove_proc_entry(PROC_DIR, NULL); | |
1869 | } | |
1870 | ||
1871 | module_init(vlsi_mod_init); | |
1872 | module_exit(vlsi_mod_exit); |