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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> | |
36 | #include <linux/init.h> | |
a6b7a407 | 37 | #include <linux/interrupt.h> |
1da177e4 LT |
38 | #include <linux/pci.h> |
39 | #include <linux/slab.h> | |
40 | #include <linux/netdevice.h> | |
41 | #include <linux/skbuff.h> | |
42 | #include <linux/delay.h> | |
43 | #include <linux/time.h> | |
44 | #include <linux/proc_fs.h> | |
45 | #include <linux/seq_file.h> | |
aa429110 | 46 | #include <linux/mutex.h> |
1da177e4 LT |
47 | #include <asm/uaccess.h> |
48 | #include <asm/byteorder.h> | |
49 | ||
50 | #include <net/irda/irda.h> | |
51 | #include <net/irda/irda_device.h> | |
52 | #include <net/irda/wrapper.h> | |
53 | #include <net/irda/crc.h> | |
54 | ||
55 | #include "vlsi_ir.h" | |
56 | ||
57 | /********************************************************/ | |
58 | ||
59 | static /* const */ char drivername[] = DRIVER_NAME; | |
60 | ||
9baa3c34 | 61 | static const struct pci_device_id vlsi_irda_table[] = { |
1da177e4 LT |
62 | { |
63 | .class = PCI_CLASS_WIRELESS_IRDA << 8, | |
64 | .class_mask = PCI_CLASS_SUBCLASS_MASK << 8, | |
65 | .vendor = PCI_VENDOR_ID_VLSI, | |
66 | .device = PCI_DEVICE_ID_VLSI_82C147, | |
67 | .subvendor = PCI_ANY_ID, | |
68 | .subdevice = PCI_ANY_ID, | |
69 | }, | |
70 | { /* all zeroes */ } | |
71 | }; | |
72 | ||
73 | MODULE_DEVICE_TABLE(pci, vlsi_irda_table); | |
74 | ||
75 | /********************************************************/ | |
76 | ||
77 | /* clksrc: which clock source to be used | |
78 | * 0: auto - try PLL, fallback to 40MHz XCLK | |
79 | * 1: on-chip 48MHz PLL | |
80 | * 2: external 48MHz XCLK | |
81 | * 3: external 40MHz XCLK (HP OB-800) | |
82 | */ | |
83 | ||
84 | static int clksrc = 0; /* default is 0(auto) */ | |
85 | module_param(clksrc, int, 0); | |
86 | MODULE_PARM_DESC(clksrc, "clock input source selection"); | |
87 | ||
88 | /* ringsize: size of the tx and rx descriptor rings | |
89 | * independent for tx and rx | |
90 | * specify as ringsize=tx[,rx] | |
91 | * allowed values: 4, 8, 16, 32, 64 | |
92 | * Due to the IrDA 1.x max. allowed window size=7, | |
93 | * there should be no gain when using rings larger than 8 | |
94 | */ | |
95 | ||
96 | static int ringsize[] = {8,8}; /* default is tx=8 / rx=8 */ | |
97 | module_param_array(ringsize, int, NULL, 0); | |
98 | MODULE_PARM_DESC(ringsize, "TX, RX ring descriptor size"); | |
99 | ||
100 | /* sirpulse: tuning of the SIR pulse width within IrPHY 1.3 limits | |
101 | * 0: very short, 1.5us (exception: 6us at 2.4 kbaud) | |
102 | * 1: nominal 3/16 bittime width | |
103 | * note: IrDA compliant peer devices should be happy regardless | |
104 | * which one is used. Primary goal is to save some power | |
105 | * on the sender's side - at 9.6kbaud for example the short | |
106 | * pulse width saves more than 90% of the transmitted IR power. | |
107 | */ | |
108 | ||
109 | static int sirpulse = 1; /* default is 3/16 bittime */ | |
110 | module_param(sirpulse, int, 0); | |
111 | MODULE_PARM_DESC(sirpulse, "SIR pulse width tuning"); | |
112 | ||
113 | /* qos_mtt_bits: encoded min-turn-time value we require the peer device | |
114 | * to use before transmitting to us. "Type 1" (per-station) | |
115 | * bitfield according to IrLAP definition (section 6.6.8) | |
116 | * Don't know which transceiver is used by my OB800 - the | |
117 | * pretty common HP HDLS-1100 requires 1 msec - so lets use this. | |
118 | */ | |
119 | ||
120 | static int qos_mtt_bits = 0x07; /* default is 1 ms or more */ | |
121 | module_param(qos_mtt_bits, int, 0); | |
122 | MODULE_PARM_DESC(qos_mtt_bits, "IrLAP bitfield representing min-turn-time"); | |
123 | ||
124 | /********************************************************/ | |
125 | ||
126 | static void vlsi_reg_debug(unsigned iobase, const char *s) | |
127 | { | |
128 | int i; | |
129 | ||
130 | printk(KERN_DEBUG "%s: ", s); | |
131 | for (i = 0; i < 0x20; i++) | |
132 | printk("%02x", (unsigned)inb((iobase+i))); | |
133 | printk("\n"); | |
134 | } | |
135 | ||
136 | static void vlsi_ring_debug(struct vlsi_ring *r) | |
137 | { | |
138 | struct ring_descr *rd; | |
139 | unsigned i; | |
140 | ||
141 | printk(KERN_DEBUG "%s - ring %p / size %u / mask 0x%04x / len %u / dir %d / hw %p\n", | |
a97a6f10 HH |
142 | __func__, r, r->size, r->mask, r->len, r->dir, r->rd[0].hw); |
143 | printk(KERN_DEBUG "%s - head = %d / tail = %d\n", __func__, | |
1da177e4 LT |
144 | atomic_read(&r->head) & r->mask, atomic_read(&r->tail) & r->mask); |
145 | for (i = 0; i < r->size; i++) { | |
146 | rd = &r->rd[i]; | |
a97a6f10 | 147 | printk(KERN_DEBUG "%s - ring descr %u: ", __func__, i); |
1da177e4 LT |
148 | printk("skb=%p data=%p hw=%p\n", rd->skb, rd->buf, rd->hw); |
149 | printk(KERN_DEBUG "%s - hw: status=%02x count=%u addr=0x%08x\n", | |
a97a6f10 | 150 | __func__, (unsigned) rd_get_status(rd), |
1da177e4 LT |
151 | (unsigned) rd_get_count(rd), (unsigned) rd_get_addr(rd)); |
152 | } | |
153 | } | |
154 | ||
155 | /********************************************************/ | |
156 | ||
157 | /* needed regardless of CONFIG_PROC_FS */ | |
158 | static struct proc_dir_entry *vlsi_proc_root = NULL; | |
159 | ||
160 | #ifdef CONFIG_PROC_FS | |
161 | ||
162 | static void vlsi_proc_pdev(struct seq_file *seq, struct pci_dev *pdev) | |
163 | { | |
164 | unsigned iobase = pci_resource_start(pdev, 0); | |
165 | unsigned i; | |
166 | ||
978e9aec | 167 | seq_printf(seq, "\n%s (vid/did: [%04x:%04x])\n", |
778a43fd | 168 | pci_name(pdev), (int)pdev->vendor, (int)pdev->device); |
1da177e4 LT |
169 | seq_printf(seq, "pci-power-state: %u\n", (unsigned) pdev->current_state); |
170 | seq_printf(seq, "resources: irq=%u / io=0x%04x / dma_mask=0x%016Lx\n", | |
171 | pdev->irq, (unsigned)pci_resource_start(pdev, 0), (unsigned long long)pdev->dma_mask); | |
172 | seq_printf(seq, "hw registers: "); | |
173 | for (i = 0; i < 0x20; i++) | |
174 | seq_printf(seq, "%02x", (unsigned)inb((iobase+i))); | |
175 | seq_printf(seq, "\n"); | |
176 | } | |
177 | ||
178 | static void vlsi_proc_ndev(struct seq_file *seq, struct net_device *ndev) | |
179 | { | |
4cf1653a | 180 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
1da177e4 LT |
181 | u8 byte; |
182 | u16 word; | |
183 | unsigned delta1, delta2; | |
184 | struct timeval now; | |
185 | unsigned iobase = ndev->base_addr; | |
186 | ||
187 | seq_printf(seq, "\n%s link state: %s / %s / %s / %s\n", ndev->name, | |
188 | netif_device_present(ndev) ? "attached" : "detached", | |
189 | netif_running(ndev) ? "running" : "not running", | |
190 | netif_carrier_ok(ndev) ? "carrier ok" : "no carrier", | |
191 | netif_queue_stopped(ndev) ? "queue stopped" : "queue running"); | |
192 | ||
193 | if (!netif_running(ndev)) | |
194 | return; | |
195 | ||
196 | seq_printf(seq, "\nhw-state:\n"); | |
197 | pci_read_config_byte(idev->pdev, VLSI_PCI_IRMISC, &byte); | |
198 | seq_printf(seq, "IRMISC:%s%s%s uart%s", | |
199 | (byte&IRMISC_IRRAIL) ? " irrail" : "", | |
200 | (byte&IRMISC_IRPD) ? " irpd" : "", | |
201 | (byte&IRMISC_UARTTST) ? " uarttest" : "", | |
202 | (byte&IRMISC_UARTEN) ? "@" : " disabled\n"); | |
203 | if (byte&IRMISC_UARTEN) { | |
204 | seq_printf(seq, "0x%s\n", | |
205 | (byte&2) ? ((byte&1) ? "3e8" : "2e8") | |
206 | : ((byte&1) ? "3f8" : "2f8")); | |
207 | } | |
208 | pci_read_config_byte(idev->pdev, VLSI_PCI_CLKCTL, &byte); | |
209 | seq_printf(seq, "CLKCTL: PLL %s%s%s / clock %s / wakeup %s\n", | |
210 | (byte&CLKCTL_PD_INV) ? "powered" : "down", | |
211 | (byte&CLKCTL_LOCK) ? " locked" : "", | |
212 | (byte&CLKCTL_EXTCLK) ? ((byte&CLKCTL_XCKSEL)?" / 40 MHz XCLK":" / 48 MHz XCLK") : "", | |
213 | (byte&CLKCTL_CLKSTP) ? "stopped" : "running", | |
214 | (byte&CLKCTL_WAKE) ? "enabled" : "disabled"); | |
215 | pci_read_config_byte(idev->pdev, VLSI_PCI_MSTRPAGE, &byte); | |
216 | seq_printf(seq, "MSTRPAGE: 0x%02x\n", (unsigned)byte); | |
217 | ||
218 | byte = inb(iobase+VLSI_PIO_IRINTR); | |
219 | seq_printf(seq, "IRINTR:%s%s%s%s%s%s%s%s\n", | |
220 | (byte&IRINTR_ACTEN) ? " ACTEN" : "", | |
221 | (byte&IRINTR_RPKTEN) ? " RPKTEN" : "", | |
222 | (byte&IRINTR_TPKTEN) ? " TPKTEN" : "", | |
223 | (byte&IRINTR_OE_EN) ? " OE_EN" : "", | |
224 | (byte&IRINTR_ACTIVITY) ? " ACTIVITY" : "", | |
225 | (byte&IRINTR_RPKTINT) ? " RPKTINT" : "", | |
226 | (byte&IRINTR_TPKTINT) ? " TPKTINT" : "", | |
227 | (byte&IRINTR_OE_INT) ? " OE_INT" : ""); | |
228 | word = inw(iobase+VLSI_PIO_RINGPTR); | |
229 | seq_printf(seq, "RINGPTR: rx=%u / tx=%u\n", RINGPTR_GET_RX(word), RINGPTR_GET_TX(word)); | |
230 | word = inw(iobase+VLSI_PIO_RINGBASE); | |
231 | seq_printf(seq, "RINGBASE: busmap=0x%08x\n", | |
232 | ((unsigned)word << 10)|(MSTRPAGE_VALUE<<24)); | |
233 | word = inw(iobase+VLSI_PIO_RINGSIZE); | |
234 | seq_printf(seq, "RINGSIZE: rx=%u / tx=%u\n", RINGSIZE_TO_RXSIZE(word), | |
235 | RINGSIZE_TO_TXSIZE(word)); | |
236 | ||
237 | word = inw(iobase+VLSI_PIO_IRCFG); | |
238 | seq_printf(seq, "IRCFG:%s%s%s%s%s%s%s%s%s%s%s%s%s\n", | |
239 | (word&IRCFG_LOOP) ? " LOOP" : "", | |
240 | (word&IRCFG_ENTX) ? " ENTX" : "", | |
241 | (word&IRCFG_ENRX) ? " ENRX" : "", | |
242 | (word&IRCFG_MSTR) ? " MSTR" : "", | |
243 | (word&IRCFG_RXANY) ? " RXANY" : "", | |
244 | (word&IRCFG_CRC16) ? " CRC16" : "", | |
245 | (word&IRCFG_FIR) ? " FIR" : "", | |
246 | (word&IRCFG_MIR) ? " MIR" : "", | |
247 | (word&IRCFG_SIR) ? " SIR" : "", | |
248 | (word&IRCFG_SIRFILT) ? " SIRFILT" : "", | |
249 | (word&IRCFG_SIRTEST) ? " SIRTEST" : "", | |
250 | (word&IRCFG_TXPOL) ? " TXPOL" : "", | |
251 | (word&IRCFG_RXPOL) ? " RXPOL" : ""); | |
252 | word = inw(iobase+VLSI_PIO_IRENABLE); | |
253 | seq_printf(seq, "IRENABLE:%s%s%s%s%s%s%s%s\n", | |
254 | (word&IRENABLE_PHYANDCLOCK) ? " PHYANDCLOCK" : "", | |
255 | (word&IRENABLE_CFGER) ? " CFGERR" : "", | |
256 | (word&IRENABLE_FIR_ON) ? " FIR_ON" : "", | |
257 | (word&IRENABLE_MIR_ON) ? " MIR_ON" : "", | |
258 | (word&IRENABLE_SIR_ON) ? " SIR_ON" : "", | |
259 | (word&IRENABLE_ENTXST) ? " ENTXST" : "", | |
260 | (word&IRENABLE_ENRXST) ? " ENRXST" : "", | |
261 | (word&IRENABLE_CRC16_ON) ? " CRC16_ON" : ""); | |
262 | word = inw(iobase+VLSI_PIO_PHYCTL); | |
263 | seq_printf(seq, "PHYCTL: baud-divisor=%u / pulsewidth=%u / preamble=%u\n", | |
264 | (unsigned)PHYCTL_TO_BAUD(word), | |
265 | (unsigned)PHYCTL_TO_PLSWID(word), | |
266 | (unsigned)PHYCTL_TO_PREAMB(word)); | |
267 | word = inw(iobase+VLSI_PIO_NPHYCTL); | |
268 | seq_printf(seq, "NPHYCTL: baud-divisor=%u / pulsewidth=%u / preamble=%u\n", | |
269 | (unsigned)PHYCTL_TO_BAUD(word), | |
270 | (unsigned)PHYCTL_TO_PLSWID(word), | |
271 | (unsigned)PHYCTL_TO_PREAMB(word)); | |
272 | word = inw(iobase+VLSI_PIO_MAXPKT); | |
273 | seq_printf(seq, "MAXPKT: max. rx packet size = %u\n", word); | |
274 | word = inw(iobase+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK; | |
275 | seq_printf(seq, "RCVBCNT: rx-fifo filling level = %u\n", word); | |
276 | ||
277 | seq_printf(seq, "\nsw-state:\n"); | |
278 | seq_printf(seq, "IrPHY setup: %d baud - %s encoding\n", idev->baud, | |
279 | (idev->mode==IFF_SIR)?"SIR":((idev->mode==IFF_MIR)?"MIR":"FIR")); | |
280 | do_gettimeofday(&now); | |
281 | if (now.tv_usec >= idev->last_rx.tv_usec) { | |
282 | delta2 = now.tv_usec - idev->last_rx.tv_usec; | |
283 | delta1 = 0; | |
284 | } | |
285 | else { | |
286 | delta2 = 1000000 + now.tv_usec - idev->last_rx.tv_usec; | |
287 | delta1 = 1; | |
288 | } | |
289 | seq_printf(seq, "last rx: %lu.%06u sec\n", | |
290 | now.tv_sec - idev->last_rx.tv_sec - delta1, delta2); | |
291 | ||
292 | seq_printf(seq, "RX: packets=%lu / bytes=%lu / errors=%lu / dropped=%lu", | |
af049081 SH |
293 | ndev->stats.rx_packets, ndev->stats.rx_bytes, ndev->stats.rx_errors, |
294 | ndev->stats.rx_dropped); | |
1da177e4 | 295 | seq_printf(seq, " / overrun=%lu / length=%lu / frame=%lu / crc=%lu\n", |
af049081 SH |
296 | ndev->stats.rx_over_errors, ndev->stats.rx_length_errors, |
297 | ndev->stats.rx_frame_errors, ndev->stats.rx_crc_errors); | |
1da177e4 | 298 | seq_printf(seq, "TX: packets=%lu / bytes=%lu / errors=%lu / dropped=%lu / fifo=%lu\n", |
af049081 SH |
299 | ndev->stats.tx_packets, ndev->stats.tx_bytes, ndev->stats.tx_errors, |
300 | ndev->stats.tx_dropped, ndev->stats.tx_fifo_errors); | |
1da177e4 LT |
301 | |
302 | } | |
303 | ||
304 | static void vlsi_proc_ring(struct seq_file *seq, struct vlsi_ring *r) | |
305 | { | |
306 | struct ring_descr *rd; | |
307 | unsigned i, j; | |
308 | int h, t; | |
309 | ||
310 | seq_printf(seq, "size %u / mask 0x%04x / len %u / dir %d / hw %p\n", | |
311 | r->size, r->mask, r->len, r->dir, r->rd[0].hw); | |
312 | h = atomic_read(&r->head) & r->mask; | |
313 | t = atomic_read(&r->tail) & r->mask; | |
314 | seq_printf(seq, "head = %d / tail = %d ", h, t); | |
315 | if (h == t) | |
316 | seq_printf(seq, "(empty)\n"); | |
317 | else { | |
318 | if (((t+1)&r->mask) == h) | |
319 | seq_printf(seq, "(full)\n"); | |
320 | else | |
321 | seq_printf(seq, "(level = %d)\n", ((unsigned)(t-h) & r->mask)); | |
322 | rd = &r->rd[h]; | |
323 | j = (unsigned) rd_get_count(rd); | |
324 | seq_printf(seq, "current: rd = %d / status = %02x / len = %u\n", | |
325 | h, (unsigned)rd_get_status(rd), j); | |
326 | if (j > 0) { | |
be07b79d AS |
327 | seq_printf(seq, " data: %*ph\n", |
328 | min_t(unsigned, j, 20), rd->buf); | |
1da177e4 LT |
329 | } |
330 | } | |
331 | for (i = 0; i < r->size; i++) { | |
332 | rd = &r->rd[i]; | |
333 | seq_printf(seq, "> ring descr %u: ", i); | |
334 | seq_printf(seq, "skb=%p data=%p hw=%p\n", rd->skb, rd->buf, rd->hw); | |
335 | seq_printf(seq, " hw: status=%02x count=%u busaddr=0x%08x\n", | |
336 | (unsigned) rd_get_status(rd), | |
337 | (unsigned) rd_get_count(rd), (unsigned) rd_get_addr(rd)); | |
338 | } | |
339 | } | |
340 | ||
341 | static int vlsi_seq_show(struct seq_file *seq, void *v) | |
342 | { | |
343 | struct net_device *ndev = seq->private; | |
4cf1653a | 344 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
1da177e4 LT |
345 | unsigned long flags; |
346 | ||
347 | seq_printf(seq, "\n%s %s\n\n", DRIVER_NAME, DRIVER_VERSION); | |
348 | seq_printf(seq, "clksrc: %s\n", | |
349 | (clksrc>=2) ? ((clksrc==3)?"40MHz XCLK":"48MHz XCLK") | |
350 | : ((clksrc==1)?"48MHz PLL":"autodetect")); | |
351 | seq_printf(seq, "ringsize: tx=%d / rx=%d\n", | |
352 | ringsize[0], ringsize[1]); | |
353 | seq_printf(seq, "sirpulse: %s\n", (sirpulse)?"3/16 bittime":"short"); | |
354 | seq_printf(seq, "qos_mtt_bits: 0x%02x\n", (unsigned)qos_mtt_bits); | |
355 | ||
356 | spin_lock_irqsave(&idev->lock, flags); | |
357 | if (idev->pdev != NULL) { | |
358 | vlsi_proc_pdev(seq, idev->pdev); | |
359 | ||
360 | if (idev->pdev->current_state == 0) | |
361 | vlsi_proc_ndev(seq, ndev); | |
362 | else | |
363 | seq_printf(seq, "\nPCI controller down - resume_ok = %d\n", | |
364 | idev->resume_ok); | |
365 | if (netif_running(ndev) && idev->rx_ring && idev->tx_ring) { | |
366 | seq_printf(seq, "\n--------- RX ring -----------\n\n"); | |
367 | vlsi_proc_ring(seq, idev->rx_ring); | |
368 | seq_printf(seq, "\n--------- TX ring -----------\n\n"); | |
369 | vlsi_proc_ring(seq, idev->tx_ring); | |
370 | } | |
371 | } | |
372 | seq_printf(seq, "\n"); | |
373 | spin_unlock_irqrestore(&idev->lock, flags); | |
374 | ||
375 | return 0; | |
376 | } | |
377 | ||
378 | static int vlsi_seq_open(struct inode *inode, struct file *file) | |
379 | { | |
d9dda78b | 380 | return single_open(file, vlsi_seq_show, PDE_DATA(inode)); |
1da177e4 LT |
381 | } |
382 | ||
d54b1fdb | 383 | static const struct file_operations vlsi_proc_fops = { |
1da177e4 LT |
384 | .owner = THIS_MODULE, |
385 | .open = vlsi_seq_open, | |
386 | .read = seq_read, | |
387 | .llseek = seq_lseek, | |
388 | .release = single_release, | |
389 | }; | |
390 | ||
391 | #define VLSI_PROC_FOPS (&vlsi_proc_fops) | |
392 | ||
393 | #else /* CONFIG_PROC_FS */ | |
394 | #define VLSI_PROC_FOPS NULL | |
395 | #endif | |
396 | ||
397 | /********************************************************/ | |
398 | ||
399 | static struct vlsi_ring *vlsi_alloc_ring(struct pci_dev *pdev, struct ring_descr_hw *hwmap, | |
400 | unsigned size, unsigned len, int dir) | |
401 | { | |
402 | struct vlsi_ring *r; | |
403 | struct ring_descr *rd; | |
404 | unsigned i, j; | |
405 | dma_addr_t busaddr; | |
406 | ||
407 | if (!size || ((size-1)&size)!=0) /* must be >0 and power of 2 */ | |
408 | return NULL; | |
409 | ||
410 | r = kmalloc(sizeof(*r) + size * sizeof(struct ring_descr), GFP_KERNEL); | |
411 | if (!r) | |
412 | return NULL; | |
413 | memset(r, 0, sizeof(*r)); | |
414 | ||
415 | r->pdev = pdev; | |
416 | r->dir = dir; | |
417 | r->len = len; | |
418 | r->rd = (struct ring_descr *)(r+1); | |
419 | r->mask = size - 1; | |
420 | r->size = size; | |
421 | atomic_set(&r->head, 0); | |
422 | atomic_set(&r->tail, 0); | |
423 | ||
424 | for (i = 0; i < size; i++) { | |
425 | rd = r->rd + i; | |
426 | memset(rd, 0, sizeof(*rd)); | |
427 | rd->hw = hwmap + i; | |
428 | rd->buf = kmalloc(len, GFP_KERNEL|GFP_DMA); | |
8e95a202 JP |
429 | if (rd->buf == NULL || |
430 | !(busaddr = pci_map_single(pdev, rd->buf, len, dir))) { | |
1da177e4 | 431 | if (rd->buf) { |
6c91023d JP |
432 | net_err_ratelimited("%s: failed to create PCI-MAP for %p\n", |
433 | __func__, rd->buf); | |
1da177e4 LT |
434 | kfree(rd->buf); |
435 | rd->buf = NULL; | |
436 | } | |
437 | for (j = 0; j < i; j++) { | |
438 | rd = r->rd + j; | |
439 | busaddr = rd_get_addr(rd); | |
440 | rd_set_addr_status(rd, 0, 0); | |
441 | if (busaddr) | |
442 | pci_unmap_single(pdev, busaddr, len, dir); | |
443 | kfree(rd->buf); | |
444 | rd->buf = NULL; | |
445 | } | |
446 | kfree(r); | |
447 | return NULL; | |
448 | } | |
449 | rd_set_addr_status(rd, busaddr, 0); | |
450 | /* initially, the dma buffer is owned by the CPU */ | |
451 | rd->skb = NULL; | |
452 | } | |
453 | return r; | |
454 | } | |
455 | ||
456 | static int vlsi_free_ring(struct vlsi_ring *r) | |
457 | { | |
458 | struct ring_descr *rd; | |
459 | unsigned i; | |
460 | dma_addr_t busaddr; | |
461 | ||
462 | for (i = 0; i < r->size; i++) { | |
463 | rd = r->rd + i; | |
464 | if (rd->skb) | |
465 | dev_kfree_skb_any(rd->skb); | |
466 | busaddr = rd_get_addr(rd); | |
467 | rd_set_addr_status(rd, 0, 0); | |
468 | if (busaddr) | |
469 | pci_unmap_single(r->pdev, busaddr, r->len, r->dir); | |
b4558ea9 | 470 | kfree(rd->buf); |
1da177e4 LT |
471 | } |
472 | kfree(r); | |
473 | return 0; | |
474 | } | |
475 | ||
476 | static int vlsi_create_hwif(vlsi_irda_dev_t *idev) | |
477 | { | |
478 | char *ringarea; | |
479 | struct ring_descr_hw *hwmap; | |
480 | ||
481 | idev->virtaddr = NULL; | |
482 | idev->busaddr = 0; | |
483 | ||
38537b7f JP |
484 | ringarea = pci_zalloc_consistent(idev->pdev, HW_RING_AREA_SIZE, |
485 | &idev->busaddr); | |
6c91023d | 486 | if (!ringarea) |
1da177e4 | 487 | goto out; |
1da177e4 LT |
488 | |
489 | hwmap = (struct ring_descr_hw *)ringarea; | |
490 | idev->rx_ring = vlsi_alloc_ring(idev->pdev, hwmap, ringsize[1], | |
491 | XFER_BUF_SIZE, PCI_DMA_FROMDEVICE); | |
492 | if (idev->rx_ring == NULL) | |
493 | goto out_unmap; | |
494 | ||
495 | hwmap += MAX_RING_DESCR; | |
496 | idev->tx_ring = vlsi_alloc_ring(idev->pdev, hwmap, ringsize[0], | |
497 | XFER_BUF_SIZE, PCI_DMA_TODEVICE); | |
498 | if (idev->tx_ring == NULL) | |
499 | goto out_free_rx; | |
500 | ||
501 | idev->virtaddr = ringarea; | |
502 | return 0; | |
503 | ||
504 | out_free_rx: | |
505 | vlsi_free_ring(idev->rx_ring); | |
506 | out_unmap: | |
507 | idev->rx_ring = idev->tx_ring = NULL; | |
508 | pci_free_consistent(idev->pdev, HW_RING_AREA_SIZE, ringarea, idev->busaddr); | |
509 | idev->busaddr = 0; | |
510 | out: | |
511 | return -ENOMEM; | |
512 | } | |
513 | ||
514 | static int vlsi_destroy_hwif(vlsi_irda_dev_t *idev) | |
515 | { | |
516 | vlsi_free_ring(idev->rx_ring); | |
517 | vlsi_free_ring(idev->tx_ring); | |
518 | idev->rx_ring = idev->tx_ring = NULL; | |
519 | ||
520 | if (idev->busaddr) | |
521 | pci_free_consistent(idev->pdev,HW_RING_AREA_SIZE,idev->virtaddr,idev->busaddr); | |
522 | ||
523 | idev->virtaddr = NULL; | |
524 | idev->busaddr = 0; | |
525 | ||
526 | return 0; | |
527 | } | |
528 | ||
529 | /********************************************************/ | |
530 | ||
531 | static int vlsi_process_rx(struct vlsi_ring *r, struct ring_descr *rd) | |
532 | { | |
533 | u16 status; | |
534 | int crclen, len = 0; | |
535 | struct sk_buff *skb; | |
536 | int ret = 0; | |
1ecfd462 | 537 | struct net_device *ndev = pci_get_drvdata(r->pdev); |
4cf1653a | 538 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
1da177e4 LT |
539 | |
540 | pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir); | |
541 | /* dma buffer now owned by the CPU */ | |
542 | status = rd_get_status(rd); | |
543 | if (status & RD_RX_ERROR) { | |
544 | if (status & RD_RX_OVER) | |
545 | ret |= VLSI_RX_OVER; | |
546 | if (status & RD_RX_LENGTH) | |
547 | ret |= VLSI_RX_LENGTH; | |
548 | if (status & RD_RX_PHYERR) | |
549 | ret |= VLSI_RX_FRAME; | |
550 | if (status & RD_RX_CRCERR) | |
551 | ret |= VLSI_RX_CRC; | |
552 | goto done; | |
553 | } | |
554 | ||
555 | len = rd_get_count(rd); | |
556 | crclen = (idev->mode==IFF_FIR) ? sizeof(u32) : sizeof(u16); | |
557 | len -= crclen; /* remove trailing CRC */ | |
558 | if (len <= 0) { | |
a97a6f10 | 559 | IRDA_DEBUG(0, "%s: strange frame (len=%d)\n", __func__, len); |
1da177e4 LT |
560 | ret |= VLSI_RX_DROP; |
561 | goto done; | |
562 | } | |
563 | ||
564 | if (idev->mode == IFF_SIR) { /* hw checks CRC in MIR, FIR mode */ | |
565 | ||
566 | /* rd->buf is a streaming PCI_DMA_FROMDEVICE map. Doing the | |
567 | * endian-adjustment there just in place will dirty a cache line | |
568 | * which belongs to the map and thus we must be sure it will | |
569 | * get flushed before giving the buffer back to hardware. | |
570 | * vlsi_fill_rx() will do this anyway - but here we rely on. | |
571 | */ | |
572 | le16_to_cpus(rd->buf+len); | |
573 | if (irda_calc_crc16(INIT_FCS,rd->buf,len+crclen) != GOOD_FCS) { | |
a97a6f10 | 574 | IRDA_DEBUG(0, "%s: crc error\n", __func__); |
1da177e4 LT |
575 | ret |= VLSI_RX_CRC; |
576 | goto done; | |
577 | } | |
578 | } | |
579 | ||
580 | if (!rd->skb) { | |
6c91023d | 581 | net_warn_ratelimited("%s: rx packet lost\n", __func__); |
1da177e4 LT |
582 | ret |= VLSI_RX_DROP; |
583 | goto done; | |
584 | } | |
585 | ||
586 | skb = rd->skb; | |
587 | rd->skb = NULL; | |
588 | skb->dev = ndev; | |
589 | memcpy(skb_put(skb,len), rd->buf, len); | |
459a98ed | 590 | skb_reset_mac_header(skb); |
1da177e4 LT |
591 | if (in_interrupt()) |
592 | netif_rx(skb); | |
593 | else | |
594 | netif_rx_ni(skb); | |
1da177e4 LT |
595 | |
596 | done: | |
597 | rd_set_status(rd, 0); | |
598 | rd_set_count(rd, 0); | |
599 | /* buffer still owned by CPU */ | |
600 | ||
601 | return (ret) ? -ret : len; | |
602 | } | |
603 | ||
604 | static void vlsi_fill_rx(struct vlsi_ring *r) | |
605 | { | |
606 | struct ring_descr *rd; | |
607 | ||
608 | for (rd = ring_last(r); rd != NULL; rd = ring_put(r)) { | |
609 | if (rd_is_active(rd)) { | |
6c91023d JP |
610 | net_warn_ratelimited("%s: driver bug: rx descr race with hw\n", |
611 | __func__); | |
1da177e4 LT |
612 | vlsi_ring_debug(r); |
613 | break; | |
614 | } | |
615 | if (!rd->skb) { | |
616 | rd->skb = dev_alloc_skb(IRLAP_SKB_ALLOCSIZE); | |
617 | if (rd->skb) { | |
618 | skb_reserve(rd->skb,1); | |
619 | rd->skb->protocol = htons(ETH_P_IRDA); | |
620 | } | |
621 | else | |
622 | break; /* probably not worth logging? */ | |
623 | } | |
624 | /* give dma buffer back to busmaster */ | |
625 | pci_dma_sync_single_for_device(r->pdev, rd_get_addr(rd), r->len, r->dir); | |
626 | rd_activate(rd); | |
627 | } | |
628 | } | |
629 | ||
630 | static void vlsi_rx_interrupt(struct net_device *ndev) | |
631 | { | |
4cf1653a | 632 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
1da177e4 LT |
633 | struct vlsi_ring *r = idev->rx_ring; |
634 | struct ring_descr *rd; | |
635 | int ret; | |
636 | ||
637 | for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) { | |
638 | ||
639 | if (rd_is_active(rd)) | |
640 | break; | |
641 | ||
642 | ret = vlsi_process_rx(r, rd); | |
643 | ||
644 | if (ret < 0) { | |
645 | ret = -ret; | |
af049081 | 646 | ndev->stats.rx_errors++; |
1da177e4 | 647 | if (ret & VLSI_RX_DROP) |
af049081 | 648 | ndev->stats.rx_dropped++; |
1da177e4 | 649 | if (ret & VLSI_RX_OVER) |
af049081 | 650 | ndev->stats.rx_over_errors++; |
1da177e4 | 651 | if (ret & VLSI_RX_LENGTH) |
af049081 | 652 | ndev->stats.rx_length_errors++; |
1da177e4 | 653 | if (ret & VLSI_RX_FRAME) |
af049081 | 654 | ndev->stats.rx_frame_errors++; |
1da177e4 | 655 | if (ret & VLSI_RX_CRC) |
af049081 | 656 | ndev->stats.rx_crc_errors++; |
1da177e4 LT |
657 | } |
658 | else if (ret > 0) { | |
af049081 SH |
659 | ndev->stats.rx_packets++; |
660 | ndev->stats.rx_bytes += ret; | |
1da177e4 LT |
661 | } |
662 | } | |
663 | ||
664 | do_gettimeofday(&idev->last_rx); /* remember "now" for later mtt delay */ | |
665 | ||
666 | vlsi_fill_rx(r); | |
667 | ||
668 | if (ring_first(r) == NULL) { | |
669 | /* we are in big trouble, if this should ever happen */ | |
6c91023d | 670 | net_err_ratelimited("%s: rx ring exhausted!\n", __func__); |
1da177e4 LT |
671 | vlsi_ring_debug(r); |
672 | } | |
673 | else | |
674 | outw(0, ndev->base_addr+VLSI_PIO_PROMPT); | |
675 | } | |
676 | ||
677 | /* caller must have stopped the controller from busmastering */ | |
678 | ||
679 | static void vlsi_unarm_rx(vlsi_irda_dev_t *idev) | |
680 | { | |
af049081 | 681 | struct net_device *ndev = pci_get_drvdata(idev->pdev); |
1da177e4 LT |
682 | struct vlsi_ring *r = idev->rx_ring; |
683 | struct ring_descr *rd; | |
684 | int ret; | |
685 | ||
686 | for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) { | |
687 | ||
688 | ret = 0; | |
689 | if (rd_is_active(rd)) { | |
690 | rd_set_status(rd, 0); | |
691 | if (rd_get_count(rd)) { | |
a97a6f10 | 692 | IRDA_DEBUG(0, "%s - dropping rx packet\n", __func__); |
1da177e4 LT |
693 | ret = -VLSI_RX_DROP; |
694 | } | |
695 | rd_set_count(rd, 0); | |
696 | pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir); | |
697 | if (rd->skb) { | |
698 | dev_kfree_skb_any(rd->skb); | |
699 | rd->skb = NULL; | |
700 | } | |
701 | } | |
702 | else | |
703 | ret = vlsi_process_rx(r, rd); | |
704 | ||
705 | if (ret < 0) { | |
706 | ret = -ret; | |
af049081 | 707 | ndev->stats.rx_errors++; |
1da177e4 | 708 | if (ret & VLSI_RX_DROP) |
af049081 | 709 | ndev->stats.rx_dropped++; |
1da177e4 | 710 | if (ret & VLSI_RX_OVER) |
af049081 | 711 | ndev->stats.rx_over_errors++; |
1da177e4 | 712 | if (ret & VLSI_RX_LENGTH) |
af049081 | 713 | ndev->stats.rx_length_errors++; |
1da177e4 | 714 | if (ret & VLSI_RX_FRAME) |
af049081 | 715 | ndev->stats.rx_frame_errors++; |
1da177e4 | 716 | if (ret & VLSI_RX_CRC) |
af049081 | 717 | ndev->stats.rx_crc_errors++; |
1da177e4 LT |
718 | } |
719 | else if (ret > 0) { | |
af049081 SH |
720 | ndev->stats.rx_packets++; |
721 | ndev->stats.rx_bytes += ret; | |
1da177e4 LT |
722 | } |
723 | } | |
724 | } | |
725 | ||
726 | /********************************************************/ | |
727 | ||
728 | static int vlsi_process_tx(struct vlsi_ring *r, struct ring_descr *rd) | |
729 | { | |
730 | u16 status; | |
731 | int len; | |
732 | int ret; | |
733 | ||
734 | pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir); | |
735 | /* dma buffer now owned by the CPU */ | |
736 | status = rd_get_status(rd); | |
737 | if (status & RD_TX_UNDRN) | |
738 | ret = VLSI_TX_FIFO; | |
739 | else | |
740 | ret = 0; | |
741 | rd_set_status(rd, 0); | |
742 | ||
743 | if (rd->skb) { | |
744 | len = rd->skb->len; | |
745 | dev_kfree_skb_any(rd->skb); | |
746 | rd->skb = NULL; | |
747 | } | |
748 | else /* tx-skb already freed? - should never happen */ | |
749 | len = rd_get_count(rd); /* incorrect for SIR! (due to wrapping) */ | |
750 | ||
751 | rd_set_count(rd, 0); | |
752 | /* dma buffer still owned by the CPU */ | |
753 | ||
754 | return (ret) ? -ret : len; | |
755 | } | |
756 | ||
757 | static int vlsi_set_baud(vlsi_irda_dev_t *idev, unsigned iobase) | |
758 | { | |
759 | u16 nphyctl; | |
760 | u16 config; | |
761 | unsigned mode; | |
762 | int ret; | |
763 | int baudrate; | |
764 | int fifocnt; | |
765 | ||
766 | baudrate = idev->new_baud; | |
a97a6f10 | 767 | IRDA_DEBUG(2, "%s: %d -> %d\n", __func__, idev->baud, idev->new_baud); |
1da177e4 LT |
768 | if (baudrate == 4000000) { |
769 | mode = IFF_FIR; | |
770 | config = IRCFG_FIR; | |
771 | nphyctl = PHYCTL_FIR; | |
772 | } | |
773 | else if (baudrate == 1152000) { | |
774 | mode = IFF_MIR; | |
775 | config = IRCFG_MIR | IRCFG_CRC16; | |
776 | nphyctl = PHYCTL_MIR(clksrc==3); | |
777 | } | |
778 | else { | |
779 | mode = IFF_SIR; | |
780 | config = IRCFG_SIR | IRCFG_SIRFILT | IRCFG_RXANY; | |
781 | switch(baudrate) { | |
782 | default: | |
6c91023d JP |
783 | net_warn_ratelimited("%s: undefined baudrate %d - fallback to 9600!\n", |
784 | __func__, baudrate); | |
1da177e4 LT |
785 | baudrate = 9600; |
786 | /* fallthru */ | |
787 | case 2400: | |
788 | case 9600: | |
789 | case 19200: | |
790 | case 38400: | |
791 | case 57600: | |
792 | case 115200: | |
793 | nphyctl = PHYCTL_SIR(baudrate,sirpulse,clksrc==3); | |
794 | break; | |
795 | } | |
796 | } | |
797 | config |= IRCFG_MSTR | IRCFG_ENRX; | |
798 | ||
799 | fifocnt = inw(iobase+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK; | |
800 | if (fifocnt != 0) { | |
a97a6f10 | 801 | IRDA_DEBUG(0, "%s: rx fifo not empty(%d)\n", __func__, fifocnt); |
1da177e4 LT |
802 | } |
803 | ||
804 | outw(0, iobase+VLSI_PIO_IRENABLE); | |
805 | outw(config, iobase+VLSI_PIO_IRCFG); | |
806 | outw(nphyctl, iobase+VLSI_PIO_NPHYCTL); | |
807 | wmb(); | |
808 | outw(IRENABLE_PHYANDCLOCK, iobase+VLSI_PIO_IRENABLE); | |
809 | mb(); | |
810 | ||
811 | udelay(1); /* chip applies IRCFG on next rising edge of its 8MHz clock */ | |
812 | ||
813 | /* read back settings for validation */ | |
814 | ||
815 | config = inw(iobase+VLSI_PIO_IRENABLE) & IRENABLE_MASK; | |
816 | ||
817 | if (mode == IFF_FIR) | |
818 | config ^= IRENABLE_FIR_ON; | |
819 | else if (mode == IFF_MIR) | |
820 | config ^= (IRENABLE_MIR_ON|IRENABLE_CRC16_ON); | |
821 | else | |
822 | config ^= IRENABLE_SIR_ON; | |
823 | ||
824 | if (config != (IRENABLE_PHYANDCLOCK|IRENABLE_ENRXST)) { | |
6c91023d JP |
825 | net_warn_ratelimited("%s: failed to set %s mode!\n", |
826 | __func__, | |
827 | mode == IFF_SIR ? "SIR" : | |
828 | mode == IFF_MIR ? "MIR" : "FIR"); | |
1da177e4 LT |
829 | ret = -1; |
830 | } | |
831 | else { | |
832 | if (inw(iobase+VLSI_PIO_PHYCTL) != nphyctl) { | |
6c91023d JP |
833 | net_warn_ratelimited("%s: failed to apply baudrate %d\n", |
834 | __func__, baudrate); | |
1da177e4 LT |
835 | ret = -1; |
836 | } | |
837 | else { | |
838 | idev->mode = mode; | |
839 | idev->baud = baudrate; | |
840 | idev->new_baud = 0; | |
841 | ret = 0; | |
842 | } | |
843 | } | |
844 | ||
845 | if (ret) | |
a97a6f10 | 846 | vlsi_reg_debug(iobase,__func__); |
1da177e4 LT |
847 | |
848 | return ret; | |
849 | } | |
850 | ||
6518bbb8 SH |
851 | static netdev_tx_t vlsi_hard_start_xmit(struct sk_buff *skb, |
852 | struct net_device *ndev) | |
1da177e4 | 853 | { |
4cf1653a | 854 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
1da177e4 LT |
855 | struct vlsi_ring *r = idev->tx_ring; |
856 | struct ring_descr *rd; | |
857 | unsigned long flags; | |
858 | unsigned iobase = ndev->base_addr; | |
859 | u8 status; | |
860 | u16 config; | |
861 | int mtt; | |
862 | int len, speed; | |
863 | struct timeval now, ready; | |
864 | char *msg = NULL; | |
865 | ||
866 | speed = irda_get_next_speed(skb); | |
867 | spin_lock_irqsave(&idev->lock, flags); | |
868 | if (speed != -1 && speed != idev->baud) { | |
869 | netif_stop_queue(ndev); | |
870 | idev->new_baud = speed; | |
871 | status = RD_TX_CLRENTX; /* stop tx-ring after this frame */ | |
872 | } | |
873 | else | |
874 | status = 0; | |
875 | ||
876 | if (skb->len == 0) { | |
877 | /* handle zero packets - should be speed change */ | |
878 | if (status == 0) { | |
879 | msg = "bogus zero-length packet"; | |
880 | goto drop_unlock; | |
881 | } | |
882 | ||
883 | /* due to the completely asynch tx operation we might have | |
884 | * IrLAP racing with the hardware here, f.e. if the controller | |
885 | * is just sending the last packet with current speed while | |
886 | * the LAP is already switching the speed using synchronous | |
887 | * len=0 packet. Immediate execution would lead to hw lockup | |
888 | * requiring a powercycle to reset. Good candidate to trigger | |
889 | * this is the final UA:RSP packet after receiving a DISC:CMD | |
890 | * when getting the LAP down. | |
891 | * Note that we are not protected by the queue_stop approach | |
892 | * because the final UA:RSP arrives _without_ request to apply | |
893 | * new-speed-after-this-packet - hence the driver doesn't know | |
894 | * this was the last packet and doesn't stop the queue. So the | |
895 | * forced switch to default speed from LAP gets through as fast | |
896 | * as only some 10 usec later while the UA:RSP is still processed | |
897 | * by the hardware and we would get screwed. | |
898 | */ | |
899 | ||
900 | if (ring_first(idev->tx_ring) == NULL) { | |
901 | /* no race - tx-ring already empty */ | |
902 | vlsi_set_baud(idev, iobase); | |
903 | netif_wake_queue(ndev); | |
904 | } | |
905 | else | |
906 | ; | |
907 | /* keep the speed change pending like it would | |
908 | * for any len>0 packet. tx completion interrupt | |
909 | * will apply it when the tx ring becomes empty. | |
910 | */ | |
911 | spin_unlock_irqrestore(&idev->lock, flags); | |
912 | dev_kfree_skb_any(skb); | |
6ed10654 | 913 | return NETDEV_TX_OK; |
1da177e4 LT |
914 | } |
915 | ||
916 | /* sanity checks - simply drop the packet */ | |
917 | ||
918 | rd = ring_last(r); | |
919 | if (!rd) { | |
920 | msg = "ring full, but queue wasn't stopped"; | |
921 | goto drop_unlock; | |
922 | } | |
923 | ||
924 | if (rd_is_active(rd)) { | |
925 | msg = "entry still owned by hw"; | |
926 | goto drop_unlock; | |
927 | } | |
928 | ||
929 | if (!rd->buf) { | |
930 | msg = "tx ring entry without pci buffer"; | |
931 | goto drop_unlock; | |
932 | } | |
933 | ||
934 | if (rd->skb) { | |
935 | msg = "ring entry with old skb still attached"; | |
936 | goto drop_unlock; | |
937 | } | |
938 | ||
939 | /* no need for serialization or interrupt disable during mtt */ | |
940 | spin_unlock_irqrestore(&idev->lock, flags); | |
941 | ||
942 | if ((mtt = irda_get_mtt(skb)) > 0) { | |
943 | ||
944 | ready.tv_usec = idev->last_rx.tv_usec + mtt; | |
945 | ready.tv_sec = idev->last_rx.tv_sec; | |
946 | if (ready.tv_usec >= 1000000) { | |
947 | ready.tv_usec -= 1000000; | |
948 | ready.tv_sec++; /* IrLAP 1.1: mtt always < 1 sec */ | |
949 | } | |
950 | for(;;) { | |
951 | do_gettimeofday(&now); | |
8e95a202 JP |
952 | if (now.tv_sec > ready.tv_sec || |
953 | (now.tv_sec==ready.tv_sec && now.tv_usec>=ready.tv_usec)) | |
1da177e4 LT |
954 | break; |
955 | udelay(100); | |
932ff279 | 956 | /* must not sleep here - called under netif_tx_lock! */ |
1da177e4 LT |
957 | } |
958 | } | |
959 | ||
960 | /* tx buffer already owned by CPU due to pci_dma_sync_single_for_cpu() | |
961 | * after subsequent tx-completion | |
962 | */ | |
963 | ||
964 | if (idev->mode == IFF_SIR) { | |
965 | status |= RD_TX_DISCRC; /* no hw-crc creation */ | |
966 | len = async_wrap_skb(skb, rd->buf, r->len); | |
967 | ||
968 | /* Some rare worst case situation in SIR mode might lead to | |
969 | * potential buffer overflow. The wrapper detects this, returns | |
970 | * with a shortened frame (without FCS/EOF) but doesn't provide | |
971 | * any error indication about the invalid packet which we are | |
972 | * going to transmit. | |
973 | * Therefore we log if the buffer got filled to the point, where the | |
974 | * wrapper would abort, i.e. when there are less than 5 bytes left to | |
975 | * allow appending the FCS/EOF. | |
976 | */ | |
977 | ||
978 | if (len >= r->len-5) | |
6c91023d JP |
979 | net_warn_ratelimited("%s: possible buffer overflow with SIR wrapping!\n", |
980 | __func__); | |
1da177e4 LT |
981 | } |
982 | else { | |
983 | /* hw deals with MIR/FIR mode wrapping */ | |
984 | status |= RD_TX_PULSE; /* send 2 us highspeed indication pulse */ | |
985 | len = skb->len; | |
986 | if (len > r->len) { | |
987 | msg = "frame exceeds tx buffer length"; | |
988 | goto drop; | |
989 | } | |
990 | else | |
d626f62b | 991 | skb_copy_from_linear_data(skb, rd->buf, len); |
1da177e4 LT |
992 | } |
993 | ||
994 | rd->skb = skb; /* remember skb for tx-complete stats */ | |
995 | ||
996 | rd_set_count(rd, len); | |
997 | rd_set_status(rd, status); /* not yet active! */ | |
998 | ||
999 | /* give dma buffer back to busmaster-hw (flush caches to make | |
1000 | * CPU-driven changes visible from the pci bus). | |
1001 | */ | |
1002 | ||
1003 | pci_dma_sync_single_for_device(r->pdev, rd_get_addr(rd), r->len, r->dir); | |
1004 | ||
1005 | /* Switching to TX mode here races with the controller | |
1006 | * which may stop TX at any time when fetching an inactive descriptor | |
1007 | * or one with CLR_ENTX set. So we switch on TX only, if TX was not running | |
1008 | * _after_ the new descriptor was activated on the ring. This ensures | |
1009 | * we will either find TX already stopped or we can be sure, there | |
1010 | * will be a TX-complete interrupt even if the chip stopped doing | |
1011 | * TX just after we found it still running. The ISR will then find | |
1012 | * the non-empty ring and restart TX processing. The enclosing | |
1013 | * spinlock provides the correct serialization to prevent race with isr. | |
1014 | */ | |
1015 | ||
1016 | spin_lock_irqsave(&idev->lock,flags); | |
1017 | ||
1018 | rd_activate(rd); | |
1019 | ||
1020 | if (!(inw(iobase+VLSI_PIO_IRENABLE) & IRENABLE_ENTXST)) { | |
1021 | int fifocnt; | |
1022 | ||
1023 | fifocnt = inw(ndev->base_addr+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK; | |
1024 | if (fifocnt != 0) { | |
a97a6f10 | 1025 | IRDA_DEBUG(0, "%s: rx fifo not empty(%d)\n", __func__, fifocnt); |
1da177e4 LT |
1026 | } |
1027 | ||
1028 | config = inw(iobase+VLSI_PIO_IRCFG); | |
1029 | mb(); | |
1030 | outw(config | IRCFG_ENTX, iobase+VLSI_PIO_IRCFG); | |
1031 | wmb(); | |
1032 | outw(0, iobase+VLSI_PIO_PROMPT); | |
1033 | } | |
1da177e4 LT |
1034 | |
1035 | if (ring_put(r) == NULL) { | |
1036 | netif_stop_queue(ndev); | |
a97a6f10 | 1037 | IRDA_DEBUG(3, "%s: tx ring full - queue stopped\n", __func__); |
1da177e4 LT |
1038 | } |
1039 | spin_unlock_irqrestore(&idev->lock, flags); | |
1040 | ||
6ed10654 | 1041 | return NETDEV_TX_OK; |
1da177e4 LT |
1042 | |
1043 | drop_unlock: | |
1044 | spin_unlock_irqrestore(&idev->lock, flags); | |
1045 | drop: | |
6c91023d | 1046 | net_warn_ratelimited("%s: dropping packet - %s\n", __func__, msg); |
1da177e4 | 1047 | dev_kfree_skb_any(skb); |
af049081 SH |
1048 | ndev->stats.tx_errors++; |
1049 | ndev->stats.tx_dropped++; | |
1da177e4 LT |
1050 | /* Don't even think about returning NET_XMIT_DROP (=1) here! |
1051 | * In fact any retval!=0 causes the packet scheduler to requeue the | |
1052 | * packet for later retry of transmission - which isn't exactly | |
1053 | * what we want after we've just called dev_kfree_skb_any ;-) | |
1054 | */ | |
6ed10654 | 1055 | return NETDEV_TX_OK; |
1da177e4 LT |
1056 | } |
1057 | ||
1058 | static void vlsi_tx_interrupt(struct net_device *ndev) | |
1059 | { | |
4cf1653a | 1060 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
1da177e4 LT |
1061 | struct vlsi_ring *r = idev->tx_ring; |
1062 | struct ring_descr *rd; | |
1063 | unsigned iobase; | |
1064 | int ret; | |
1065 | u16 config; | |
1066 | ||
1067 | for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) { | |
1068 | ||
1069 | if (rd_is_active(rd)) | |
1070 | break; | |
1071 | ||
1072 | ret = vlsi_process_tx(r, rd); | |
1073 | ||
1074 | if (ret < 0) { | |
1075 | ret = -ret; | |
af049081 | 1076 | ndev->stats.tx_errors++; |
1da177e4 | 1077 | if (ret & VLSI_TX_DROP) |
af049081 | 1078 | ndev->stats.tx_dropped++; |
1da177e4 | 1079 | if (ret & VLSI_TX_FIFO) |
af049081 | 1080 | ndev->stats.tx_fifo_errors++; |
1da177e4 LT |
1081 | } |
1082 | else if (ret > 0){ | |
af049081 SH |
1083 | ndev->stats.tx_packets++; |
1084 | ndev->stats.tx_bytes += ret; | |
1da177e4 LT |
1085 | } |
1086 | } | |
1087 | ||
1088 | iobase = ndev->base_addr; | |
1089 | ||
1090 | if (idev->new_baud && rd == NULL) /* tx ring empty and speed change pending */ | |
1091 | vlsi_set_baud(idev, iobase); | |
1092 | ||
1093 | config = inw(iobase+VLSI_PIO_IRCFG); | |
1094 | if (rd == NULL) /* tx ring empty: re-enable rx */ | |
1095 | outw((config & ~IRCFG_ENTX) | IRCFG_ENRX, iobase+VLSI_PIO_IRCFG); | |
1096 | ||
1097 | else if (!(inw(iobase+VLSI_PIO_IRENABLE) & IRENABLE_ENTXST)) { | |
1098 | int fifocnt; | |
1099 | ||
1100 | fifocnt = inw(iobase+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK; | |
1101 | if (fifocnt != 0) { | |
1102 | IRDA_DEBUG(0, "%s: rx fifo not empty(%d)\n", | |
a97a6f10 | 1103 | __func__, fifocnt); |
1da177e4 LT |
1104 | } |
1105 | outw(config | IRCFG_ENTX, iobase+VLSI_PIO_IRCFG); | |
1106 | } | |
1107 | ||
1108 | outw(0, iobase+VLSI_PIO_PROMPT); | |
1109 | ||
1110 | if (netif_queue_stopped(ndev) && !idev->new_baud) { | |
1111 | netif_wake_queue(ndev); | |
a97a6f10 | 1112 | IRDA_DEBUG(3, "%s: queue awoken\n", __func__); |
1da177e4 LT |
1113 | } |
1114 | } | |
1115 | ||
1116 | /* caller must have stopped the controller from busmastering */ | |
1117 | ||
1118 | static void vlsi_unarm_tx(vlsi_irda_dev_t *idev) | |
1119 | { | |
af049081 | 1120 | struct net_device *ndev = pci_get_drvdata(idev->pdev); |
1da177e4 LT |
1121 | struct vlsi_ring *r = idev->tx_ring; |
1122 | struct ring_descr *rd; | |
1123 | int ret; | |
1124 | ||
1125 | for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) { | |
1126 | ||
1127 | ret = 0; | |
1128 | if (rd_is_active(rd)) { | |
1129 | rd_set_status(rd, 0); | |
1130 | rd_set_count(rd, 0); | |
1131 | pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir); | |
1132 | if (rd->skb) { | |
1133 | dev_kfree_skb_any(rd->skb); | |
1134 | rd->skb = NULL; | |
1135 | } | |
a97a6f10 | 1136 | IRDA_DEBUG(0, "%s - dropping tx packet\n", __func__); |
1da177e4 LT |
1137 | ret = -VLSI_TX_DROP; |
1138 | } | |
1139 | else | |
1140 | ret = vlsi_process_tx(r, rd); | |
1141 | ||
1142 | if (ret < 0) { | |
1143 | ret = -ret; | |
af049081 | 1144 | ndev->stats.tx_errors++; |
1da177e4 | 1145 | if (ret & VLSI_TX_DROP) |
af049081 | 1146 | ndev->stats.tx_dropped++; |
1da177e4 | 1147 | if (ret & VLSI_TX_FIFO) |
af049081 | 1148 | ndev->stats.tx_fifo_errors++; |
1da177e4 LT |
1149 | } |
1150 | else if (ret > 0){ | |
af049081 SH |
1151 | ndev->stats.tx_packets++; |
1152 | ndev->stats.tx_bytes += ret; | |
1da177e4 LT |
1153 | } |
1154 | } | |
1155 | ||
1156 | } | |
1157 | ||
1158 | /********************************************************/ | |
1159 | ||
1160 | static int vlsi_start_clock(struct pci_dev *pdev) | |
1161 | { | |
1162 | u8 clkctl, lock; | |
1163 | int i, count; | |
1164 | ||
1165 | if (clksrc < 2) { /* auto or PLL: try PLL */ | |
1166 | clkctl = CLKCTL_PD_INV | CLKCTL_CLKSTP; | |
1167 | pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl); | |
1168 | ||
1169 | /* procedure to detect PLL lock synchronisation: | |
1170 | * after 0.5 msec initial delay we expect to find 3 PLL lock | |
1171 | * indications within 10 msec for successful PLL detection. | |
1172 | */ | |
1173 | udelay(500); | |
1174 | count = 0; | |
1175 | for (i = 500; i <= 10000; i += 50) { /* max 10 msec */ | |
1176 | pci_read_config_byte(pdev, VLSI_PCI_CLKCTL, &lock); | |
1177 | if (lock&CLKCTL_LOCK) { | |
1178 | if (++count >= 3) | |
1179 | break; | |
1180 | } | |
1181 | udelay(50); | |
1182 | } | |
1183 | if (count < 3) { | |
1184 | if (clksrc == 1) { /* explicitly asked for PLL hence bail out */ | |
6c91023d JP |
1185 | net_err_ratelimited("%s: no PLL or failed to lock!\n", |
1186 | __func__); | |
1da177e4 LT |
1187 | clkctl = CLKCTL_CLKSTP; |
1188 | pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl); | |
1189 | return -1; | |
1190 | } | |
1191 | else /* was: clksrc=0(auto) */ | |
1192 | clksrc = 3; /* fallback to 40MHz XCLK (OB800) */ | |
1193 | ||
1194 | IRDA_DEBUG(0, "%s: PLL not locked, fallback to clksrc=%d\n", | |
a97a6f10 | 1195 | __func__, clksrc); |
1da177e4 LT |
1196 | } |
1197 | else | |
1198 | clksrc = 1; /* got successful PLL lock */ | |
1199 | } | |
1200 | ||
1201 | if (clksrc != 1) { | |
1202 | /* we get here if either no PLL detected in auto-mode or | |
1203 | an external clock source was explicitly specified */ | |
1204 | ||
1205 | clkctl = CLKCTL_EXTCLK | CLKCTL_CLKSTP; | |
1206 | if (clksrc == 3) | |
1207 | clkctl |= CLKCTL_XCKSEL; | |
1208 | pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl); | |
1209 | ||
1210 | /* no way to test for working XCLK */ | |
1211 | } | |
1212 | else | |
1213 | pci_read_config_byte(pdev, VLSI_PCI_CLKCTL, &clkctl); | |
1214 | ||
1215 | /* ok, now going to connect the chip with the clock source */ | |
1216 | ||
1217 | clkctl &= ~CLKCTL_CLKSTP; | |
1218 | pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl); | |
1219 | ||
1220 | return 0; | |
1221 | } | |
1222 | ||
1223 | static void vlsi_stop_clock(struct pci_dev *pdev) | |
1224 | { | |
1225 | u8 clkctl; | |
1226 | ||
1227 | /* disconnect chip from clock source */ | |
1228 | pci_read_config_byte(pdev, VLSI_PCI_CLKCTL, &clkctl); | |
1229 | clkctl |= CLKCTL_CLKSTP; | |
1230 | pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl); | |
1231 | ||
1232 | /* disable all clock sources */ | |
1233 | clkctl &= ~(CLKCTL_EXTCLK | CLKCTL_PD_INV); | |
1234 | pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl); | |
1235 | } | |
1236 | ||
1237 | /********************************************************/ | |
1238 | ||
1239 | /* writing all-zero to the VLSI PCI IO register area seems to prevent | |
1240 | * some occasional situations where the hardware fails (symptoms are | |
1241 | * what appears as stalled tx/rx state machines, i.e. everything ok for | |
1242 | * receive or transmit but hw makes no progress or is unable to access | |
1243 | * the bus memory locations). | |
1244 | * Best place to call this is immediately after/before the internal clock | |
1245 | * gets started/stopped. | |
1246 | */ | |
1247 | ||
1248 | static inline void vlsi_clear_regs(unsigned iobase) | |
1249 | { | |
1250 | unsigned i; | |
1251 | const unsigned chip_io_extent = 32; | |
1252 | ||
1253 | for (i = 0; i < chip_io_extent; i += sizeof(u16)) | |
1254 | outw(0, iobase + i); | |
1255 | } | |
1256 | ||
1257 | static int vlsi_init_chip(struct pci_dev *pdev) | |
1258 | { | |
1259 | struct net_device *ndev = pci_get_drvdata(pdev); | |
4cf1653a | 1260 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
1da177e4 LT |
1261 | unsigned iobase; |
1262 | u16 ptr; | |
1263 | ||
1264 | /* start the clock and clean the registers */ | |
1265 | ||
1266 | if (vlsi_start_clock(pdev)) { | |
6c91023d | 1267 | net_err_ratelimited("%s: no valid clock source\n", __func__); |
1da177e4 LT |
1268 | return -1; |
1269 | } | |
1270 | iobase = ndev->base_addr; | |
1271 | vlsi_clear_regs(iobase); | |
1272 | ||
1273 | outb(IRINTR_INT_MASK, iobase+VLSI_PIO_IRINTR); /* w/c pending IRQ, disable all INT */ | |
1274 | ||
1275 | outw(0, iobase+VLSI_PIO_IRENABLE); /* disable IrPHY-interface */ | |
1276 | ||
1277 | /* disable everything, particularly IRCFG_MSTR - (also resetting the RING_PTR) */ | |
1278 | ||
1279 | outw(0, iobase+VLSI_PIO_IRCFG); | |
1280 | wmb(); | |
1281 | ||
1282 | outw(MAX_PACKET_LENGTH, iobase+VLSI_PIO_MAXPKT); /* max possible value=0x0fff */ | |
1283 | ||
1284 | outw(BUS_TO_RINGBASE(idev->busaddr), iobase+VLSI_PIO_RINGBASE); | |
1285 | ||
1286 | outw(TX_RX_TO_RINGSIZE(idev->tx_ring->size, idev->rx_ring->size), | |
1287 | iobase+VLSI_PIO_RINGSIZE); | |
1288 | ||
1289 | ptr = inw(iobase+VLSI_PIO_RINGPTR); | |
1290 | atomic_set(&idev->rx_ring->head, RINGPTR_GET_RX(ptr)); | |
1291 | atomic_set(&idev->rx_ring->tail, RINGPTR_GET_RX(ptr)); | |
1292 | atomic_set(&idev->tx_ring->head, RINGPTR_GET_TX(ptr)); | |
1293 | atomic_set(&idev->tx_ring->tail, RINGPTR_GET_TX(ptr)); | |
1294 | ||
1295 | vlsi_set_baud(idev, iobase); /* idev->new_baud used as provided by caller */ | |
1296 | ||
1297 | outb(IRINTR_INT_MASK, iobase+VLSI_PIO_IRINTR); /* just in case - w/c pending IRQ's */ | |
1298 | wmb(); | |
1299 | ||
1300 | /* DO NOT BLINDLY ENABLE IRINTR_ACTEN! | |
1301 | * basically every received pulse fires an ACTIVITY-INT | |
1302 | * leading to >>1000 INT's per second instead of few 10 | |
1303 | */ | |
1304 | ||
1305 | outb(IRINTR_RPKTEN|IRINTR_TPKTEN, iobase+VLSI_PIO_IRINTR); | |
1306 | ||
1307 | return 0; | |
1308 | } | |
1309 | ||
1310 | static int vlsi_start_hw(vlsi_irda_dev_t *idev) | |
1311 | { | |
1312 | struct pci_dev *pdev = idev->pdev; | |
1313 | struct net_device *ndev = pci_get_drvdata(pdev); | |
1314 | unsigned iobase = ndev->base_addr; | |
1315 | u8 byte; | |
1316 | ||
1317 | /* we don't use the legacy UART, disable its address decoding */ | |
1318 | ||
1319 | pci_read_config_byte(pdev, VLSI_PCI_IRMISC, &byte); | |
1320 | byte &= ~(IRMISC_UARTEN | IRMISC_UARTTST); | |
1321 | pci_write_config_byte(pdev, VLSI_PCI_IRMISC, byte); | |
1322 | ||
1323 | /* enable PCI busmaster access to our 16MB page */ | |
1324 | ||
1325 | pci_write_config_byte(pdev, VLSI_PCI_MSTRPAGE, MSTRPAGE_VALUE); | |
1326 | pci_set_master(pdev); | |
1327 | ||
1328 | if (vlsi_init_chip(pdev) < 0) { | |
1329 | pci_disable_device(pdev); | |
1330 | return -1; | |
1331 | } | |
1332 | ||
1333 | vlsi_fill_rx(idev->rx_ring); | |
1334 | ||
1335 | do_gettimeofday(&idev->last_rx); /* first mtt may start from now on */ | |
1336 | ||
1337 | outw(0, iobase+VLSI_PIO_PROMPT); /* kick hw state machine */ | |
1338 | ||
1339 | return 0; | |
1340 | } | |
1341 | ||
1342 | static int vlsi_stop_hw(vlsi_irda_dev_t *idev) | |
1343 | { | |
1344 | struct pci_dev *pdev = idev->pdev; | |
1345 | struct net_device *ndev = pci_get_drvdata(pdev); | |
1346 | unsigned iobase = ndev->base_addr; | |
1347 | unsigned long flags; | |
1348 | ||
1349 | spin_lock_irqsave(&idev->lock,flags); | |
1350 | outw(0, iobase+VLSI_PIO_IRENABLE); | |
1351 | outw(0, iobase+VLSI_PIO_IRCFG); /* disable everything */ | |
1352 | ||
1353 | /* disable and w/c irqs */ | |
1354 | outb(0, iobase+VLSI_PIO_IRINTR); | |
1355 | wmb(); | |
1356 | outb(IRINTR_INT_MASK, iobase+VLSI_PIO_IRINTR); | |
1357 | spin_unlock_irqrestore(&idev->lock,flags); | |
1358 | ||
1359 | vlsi_unarm_tx(idev); | |
1360 | vlsi_unarm_rx(idev); | |
1361 | ||
1362 | vlsi_clear_regs(iobase); | |
1363 | vlsi_stop_clock(pdev); | |
1364 | ||
1365 | pci_disable_device(pdev); | |
1366 | ||
1367 | return 0; | |
1368 | } | |
1369 | ||
1370 | /**************************************************************/ | |
1371 | ||
1da177e4 LT |
1372 | static void vlsi_tx_timeout(struct net_device *ndev) |
1373 | { | |
4cf1653a | 1374 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
1da177e4 LT |
1375 | |
1376 | ||
a97a6f10 | 1377 | vlsi_reg_debug(ndev->base_addr, __func__); |
1da177e4 LT |
1378 | vlsi_ring_debug(idev->tx_ring); |
1379 | ||
1380 | if (netif_running(ndev)) | |
1381 | netif_stop_queue(ndev); | |
1382 | ||
1383 | vlsi_stop_hw(idev); | |
1384 | ||
1385 | /* now simply restart the whole thing */ | |
1386 | ||
1387 | if (!idev->new_baud) | |
1388 | idev->new_baud = idev->baud; /* keep current baudrate */ | |
1389 | ||
1390 | if (vlsi_start_hw(idev)) | |
6c91023d JP |
1391 | net_err_ratelimited("%s: failed to restart hw - %s(%s) unusable!\n", |
1392 | __func__, pci_name(idev->pdev), ndev->name); | |
1da177e4 LT |
1393 | else |
1394 | netif_start_queue(ndev); | |
1395 | } | |
1396 | ||
1397 | static int vlsi_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd) | |
1398 | { | |
4cf1653a | 1399 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
1da177e4 LT |
1400 | struct if_irda_req *irq = (struct if_irda_req *) rq; |
1401 | unsigned long flags; | |
1402 | u16 fifocnt; | |
1403 | int ret = 0; | |
1404 | ||
1405 | switch (cmd) { | |
1406 | case SIOCSBANDWIDTH: | |
1407 | if (!capable(CAP_NET_ADMIN)) { | |
1408 | ret = -EPERM; | |
1409 | break; | |
1410 | } | |
1411 | spin_lock_irqsave(&idev->lock, flags); | |
1412 | idev->new_baud = irq->ifr_baudrate; | |
1413 | /* when called from userland there might be a minor race window here | |
1414 | * if the stack tries to change speed concurrently - which would be | |
1415 | * pretty strange anyway with the userland having full control... | |
1416 | */ | |
1417 | vlsi_set_baud(idev, ndev->base_addr); | |
1418 | spin_unlock_irqrestore(&idev->lock, flags); | |
1419 | break; | |
1420 | case SIOCSMEDIABUSY: | |
1421 | if (!capable(CAP_NET_ADMIN)) { | |
1422 | ret = -EPERM; | |
1423 | break; | |
1424 | } | |
1425 | irda_device_set_media_busy(ndev, TRUE); | |
1426 | break; | |
1427 | case SIOCGRECEIVING: | |
1428 | /* the best we can do: check whether there are any bytes in rx fifo. | |
1429 | * The trustable window (in case some data arrives just afterwards) | |
1430 | * may be as short as 1usec or so at 4Mbps. | |
1431 | */ | |
1432 | fifocnt = inw(ndev->base_addr+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK; | |
1433 | irq->ifr_receiving = (fifocnt!=0) ? 1 : 0; | |
1434 | break; | |
1435 | default: | |
6c91023d JP |
1436 | net_warn_ratelimited("%s: notsupp - cmd=%04x\n", |
1437 | __func__, cmd); | |
1da177e4 LT |
1438 | ret = -EOPNOTSUPP; |
1439 | } | |
1440 | ||
1441 | return ret; | |
1442 | } | |
1443 | ||
1444 | /********************************************************/ | |
1445 | ||
7d12e780 | 1446 | static irqreturn_t vlsi_interrupt(int irq, void *dev_instance) |
1da177e4 LT |
1447 | { |
1448 | struct net_device *ndev = dev_instance; | |
4cf1653a | 1449 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
1da177e4 LT |
1450 | unsigned iobase; |
1451 | u8 irintr; | |
1452 | int boguscount = 5; | |
1453 | unsigned long flags; | |
1454 | int handled = 0; | |
1455 | ||
1456 | iobase = ndev->base_addr; | |
1457 | spin_lock_irqsave(&idev->lock,flags); | |
1458 | do { | |
1459 | irintr = inb(iobase+VLSI_PIO_IRINTR); | |
1460 | mb(); | |
1461 | outb(irintr, iobase+VLSI_PIO_IRINTR); /* acknowledge asap */ | |
1462 | ||
1463 | if (!(irintr&=IRINTR_INT_MASK)) /* not our INT - probably shared */ | |
1464 | break; | |
1465 | ||
1466 | handled = 1; | |
1467 | ||
1468 | if (unlikely(!(irintr & ~IRINTR_ACTIVITY))) | |
1469 | break; /* nothing todo if only activity */ | |
1470 | ||
1471 | if (irintr&IRINTR_RPKTINT) | |
1472 | vlsi_rx_interrupt(ndev); | |
1473 | ||
1474 | if (irintr&IRINTR_TPKTINT) | |
1475 | vlsi_tx_interrupt(ndev); | |
1476 | ||
1477 | } while (--boguscount > 0); | |
1478 | spin_unlock_irqrestore(&idev->lock,flags); | |
1479 | ||
1480 | if (boguscount <= 0) | |
6c91023d JP |
1481 | net_info_ratelimited("%s: too much work in interrupt!\n", |
1482 | __func__); | |
1da177e4 LT |
1483 | return IRQ_RETVAL(handled); |
1484 | } | |
1485 | ||
1486 | /********************************************************/ | |
1487 | ||
1488 | static int vlsi_open(struct net_device *ndev) | |
1489 | { | |
4cf1653a | 1490 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
1da177e4 LT |
1491 | int err = -EAGAIN; |
1492 | char hwname[32]; | |
1493 | ||
1494 | if (pci_request_regions(idev->pdev, drivername)) { | |
6c91023d | 1495 | net_warn_ratelimited("%s: io resource busy\n", __func__); |
1da177e4 LT |
1496 | goto errout; |
1497 | } | |
1498 | ndev->base_addr = pci_resource_start(idev->pdev,0); | |
1499 | ndev->irq = idev->pdev->irq; | |
1500 | ||
1501 | /* under some rare occasions the chip apparently comes up with | |
1502 | * IRQ's pending. We better w/c pending IRQ and disable them all | |
1503 | */ | |
1504 | ||
1505 | outb(IRINTR_INT_MASK, ndev->base_addr+VLSI_PIO_IRINTR); | |
1506 | ||
1fb9df5d | 1507 | if (request_irq(ndev->irq, vlsi_interrupt, IRQF_SHARED, |
1da177e4 | 1508 | drivername, ndev)) { |
6c91023d JP |
1509 | net_warn_ratelimited("%s: couldn't get IRQ: %d\n", |
1510 | __func__, ndev->irq); | |
1da177e4 LT |
1511 | goto errout_io; |
1512 | } | |
1513 | ||
1514 | if ((err = vlsi_create_hwif(idev)) != 0) | |
1515 | goto errout_irq; | |
1516 | ||
1517 | sprintf(hwname, "VLSI-FIR @ 0x%04x", (unsigned)ndev->base_addr); | |
1518 | idev->irlap = irlap_open(ndev,&idev->qos,hwname); | |
1519 | if (!idev->irlap) | |
1520 | goto errout_free_ring; | |
1521 | ||
1522 | do_gettimeofday(&idev->last_rx); /* first mtt may start from now on */ | |
1523 | ||
1524 | idev->new_baud = 9600; /* start with IrPHY using 9600(SIR) mode */ | |
1525 | ||
1526 | if ((err = vlsi_start_hw(idev)) != 0) | |
1527 | goto errout_close_irlap; | |
1528 | ||
1529 | netif_start_queue(ndev); | |
1530 | ||
6c91023d JP |
1531 | net_info_ratelimited("%s: device %s operational\n", |
1532 | __func__, ndev->name); | |
1da177e4 LT |
1533 | |
1534 | return 0; | |
1535 | ||
1536 | errout_close_irlap: | |
1537 | irlap_close(idev->irlap); | |
1538 | errout_free_ring: | |
1539 | vlsi_destroy_hwif(idev); | |
1540 | errout_irq: | |
1541 | free_irq(ndev->irq,ndev); | |
1542 | errout_io: | |
1543 | pci_release_regions(idev->pdev); | |
1544 | errout: | |
1545 | return err; | |
1546 | } | |
1547 | ||
1548 | static int vlsi_close(struct net_device *ndev) | |
1549 | { | |
4cf1653a | 1550 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
1da177e4 LT |
1551 | |
1552 | netif_stop_queue(ndev); | |
1553 | ||
1554 | if (idev->irlap) | |
1555 | irlap_close(idev->irlap); | |
1556 | idev->irlap = NULL; | |
1557 | ||
1558 | vlsi_stop_hw(idev); | |
1559 | ||
1560 | vlsi_destroy_hwif(idev); | |
1561 | ||
1562 | free_irq(ndev->irq,ndev); | |
1563 | ||
1564 | pci_release_regions(idev->pdev); | |
1565 | ||
6c91023d | 1566 | net_info_ratelimited("%s: device %s stopped\n", __func__, ndev->name); |
1da177e4 LT |
1567 | |
1568 | return 0; | |
1569 | } | |
1570 | ||
30a5d7f7 SH |
1571 | static const struct net_device_ops vlsi_netdev_ops = { |
1572 | .ndo_open = vlsi_open, | |
1573 | .ndo_stop = vlsi_close, | |
1574 | .ndo_start_xmit = vlsi_hard_start_xmit, | |
1575 | .ndo_do_ioctl = vlsi_ioctl, | |
1576 | .ndo_tx_timeout = vlsi_tx_timeout, | |
1577 | }; | |
1578 | ||
1da177e4 LT |
1579 | static int vlsi_irda_init(struct net_device *ndev) |
1580 | { | |
4cf1653a | 1581 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
1da177e4 LT |
1582 | struct pci_dev *pdev = idev->pdev; |
1583 | ||
1da177e4 LT |
1584 | ndev->irq = pdev->irq; |
1585 | ndev->base_addr = pci_resource_start(pdev,0); | |
1586 | ||
1587 | /* PCI busmastering | |
1588 | * see include file for details why we need these 2 masks, in this order! | |
1589 | */ | |
1590 | ||
8e95a202 JP |
1591 | if (pci_set_dma_mask(pdev,DMA_MASK_USED_BY_HW) || |
1592 | pci_set_dma_mask(pdev,DMA_MASK_MSTRPAGE)) { | |
6c91023d JP |
1593 | net_err_ratelimited("%s: aborting due to PCI BM-DMA address limitations\n", |
1594 | __func__); | |
1da177e4 LT |
1595 | return -1; |
1596 | } | |
1597 | ||
1598 | irda_init_max_qos_capabilies(&idev->qos); | |
1599 | ||
1600 | /* the VLSI82C147 does not support 576000! */ | |
1601 | ||
1602 | idev->qos.baud_rate.bits = IR_2400 | IR_9600 | |
1603 | | IR_19200 | IR_38400 | IR_57600 | IR_115200 | |
1604 | | IR_1152000 | (IR_4000000 << 8); | |
1605 | ||
1606 | idev->qos.min_turn_time.bits = qos_mtt_bits; | |
1607 | ||
1608 | irda_qos_bits_to_value(&idev->qos); | |
1609 | ||
1610 | /* currently no public media definitions for IrDA */ | |
1611 | ||
1612 | ndev->flags |= IFF_PORTSEL | IFF_AUTOMEDIA; | |
1613 | ndev->if_port = IF_PORT_UNKNOWN; | |
1614 | ||
30a5d7f7 | 1615 | ndev->netdev_ops = &vlsi_netdev_ops; |
1da177e4 LT |
1616 | ndev->watchdog_timeo = 500*HZ/1000; /* max. allowed turn time for IrLAP */ |
1617 | ||
1618 | SET_NETDEV_DEV(ndev, &pdev->dev); | |
1619 | ||
1620 | return 0; | |
1621 | } | |
1622 | ||
1623 | /**************************************************************/ | |
1624 | ||
45ac936c | 1625 | static int |
1da177e4 LT |
1626 | vlsi_irda_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
1627 | { | |
1628 | struct net_device *ndev; | |
1629 | vlsi_irda_dev_t *idev; | |
1630 | ||
1631 | if (pci_enable_device(pdev)) | |
1632 | goto out; | |
1633 | else | |
1634 | pdev->current_state = 0; /* hw must be running now */ | |
1635 | ||
6c91023d JP |
1636 | net_info_ratelimited("%s: IrDA PCI controller %s detected\n", |
1637 | drivername, pci_name(pdev)); | |
1da177e4 | 1638 | |
8e95a202 JP |
1639 | if ( !pci_resource_start(pdev,0) || |
1640 | !(pci_resource_flags(pdev,0) & IORESOURCE_IO) ) { | |
6c91023d | 1641 | net_err_ratelimited("%s: bar 0 invalid", __func__); |
1da177e4 LT |
1642 | goto out_disable; |
1643 | } | |
1644 | ||
1645 | ndev = alloc_irdadev(sizeof(*idev)); | |
1646 | if (ndev==NULL) { | |
6c91023d JP |
1647 | net_err_ratelimited("%s: Unable to allocate device memory.\n", |
1648 | __func__); | |
1da177e4 LT |
1649 | goto out_disable; |
1650 | } | |
1651 | ||
4cf1653a | 1652 | idev = netdev_priv(ndev); |
1da177e4 LT |
1653 | |
1654 | spin_lock_init(&idev->lock); | |
aa429110 MK |
1655 | mutex_init(&idev->mtx); |
1656 | mutex_lock(&idev->mtx); | |
1da177e4 LT |
1657 | idev->pdev = pdev; |
1658 | ||
1659 | if (vlsi_irda_init(ndev) < 0) | |
1660 | goto out_freedev; | |
1661 | ||
1662 | if (register_netdev(ndev) < 0) { | |
6c91023d | 1663 | net_err_ratelimited("%s: register_netdev failed\n", __func__); |
1da177e4 LT |
1664 | goto out_freedev; |
1665 | } | |
1666 | ||
1667 | if (vlsi_proc_root != NULL) { | |
1668 | struct proc_dir_entry *ent; | |
1669 | ||
a95609cb DL |
1670 | ent = proc_create_data(ndev->name, S_IFREG|S_IRUGO, |
1671 | vlsi_proc_root, VLSI_PROC_FOPS, ndev); | |
1da177e4 | 1672 | if (!ent) { |
6c91023d JP |
1673 | net_warn_ratelimited("%s: failed to create proc entry\n", |
1674 | __func__); | |
1da177e4 | 1675 | } else { |
271a15ea | 1676 | proc_set_size(ent, 0); |
1da177e4 LT |
1677 | } |
1678 | idev->proc_entry = ent; | |
1679 | } | |
6c91023d JP |
1680 | net_info_ratelimited("%s: registered device %s\n", |
1681 | drivername, ndev->name); | |
1da177e4 LT |
1682 | |
1683 | pci_set_drvdata(pdev, ndev); | |
aa429110 | 1684 | mutex_unlock(&idev->mtx); |
1da177e4 LT |
1685 | |
1686 | return 0; | |
1687 | ||
1688 | out_freedev: | |
aa429110 | 1689 | mutex_unlock(&idev->mtx); |
1da177e4 LT |
1690 | free_netdev(ndev); |
1691 | out_disable: | |
1692 | pci_disable_device(pdev); | |
1693 | out: | |
1da177e4 LT |
1694 | return -ENODEV; |
1695 | } | |
1696 | ||
45ac936c | 1697 | static void vlsi_irda_remove(struct pci_dev *pdev) |
1da177e4 LT |
1698 | { |
1699 | struct net_device *ndev = pci_get_drvdata(pdev); | |
1700 | vlsi_irda_dev_t *idev; | |
1701 | ||
1702 | if (!ndev) { | |
6c91023d | 1703 | net_err_ratelimited("%s: lost netdevice?\n", drivername); |
1da177e4 LT |
1704 | return; |
1705 | } | |
1706 | ||
1707 | unregister_netdev(ndev); | |
1708 | ||
4cf1653a | 1709 | idev = netdev_priv(ndev); |
aa429110 | 1710 | mutex_lock(&idev->mtx); |
1da177e4 LT |
1711 | if (idev->proc_entry) { |
1712 | remove_proc_entry(ndev->name, vlsi_proc_root); | |
1713 | idev->proc_entry = NULL; | |
1714 | } | |
aa429110 | 1715 | mutex_unlock(&idev->mtx); |
1da177e4 LT |
1716 | |
1717 | free_netdev(ndev); | |
1718 | ||
6c91023d | 1719 | net_info_ratelimited("%s: %s removed\n", drivername, pci_name(pdev)); |
1da177e4 LT |
1720 | } |
1721 | ||
1722 | #ifdef CONFIG_PM | |
1723 | ||
1724 | /* The Controller doesn't provide PCI PM capabilities as defined by PCI specs. | |
1725 | * Some of the Linux PCI-PM code however depends on this, for example in | |
1726 | * pci_set_power_state(). So we have to take care to perform the required | |
1727 | * operations on our own (particularly reflecting the pdev->current_state) | |
1728 | * otherwise we might get cheated by pci-pm. | |
1729 | */ | |
1730 | ||
1731 | ||
05adc3b7 | 1732 | static int vlsi_irda_suspend(struct pci_dev *pdev, pm_message_t state) |
1da177e4 LT |
1733 | { |
1734 | struct net_device *ndev = pci_get_drvdata(pdev); | |
1735 | vlsi_irda_dev_t *idev; | |
1736 | ||
1da177e4 | 1737 | if (!ndev) { |
6c91023d JP |
1738 | net_err_ratelimited("%s - %s: no netdevice\n", |
1739 | __func__, pci_name(pdev)); | |
1da177e4 LT |
1740 | return 0; |
1741 | } | |
4cf1653a | 1742 | idev = netdev_priv(ndev); |
aa429110 | 1743 | mutex_lock(&idev->mtx); |
1da177e4 | 1744 | if (pdev->current_state != 0) { /* already suspended */ |
ca078bae PM |
1745 | if (state.event > pdev->current_state) { /* simply go deeper */ |
1746 | pci_set_power_state(pdev, pci_choose_state(pdev, state)); | |
1747 | pdev->current_state = state.event; | |
1da177e4 LT |
1748 | } |
1749 | else | |
6c91023d JP |
1750 | net_err_ratelimited("%s - %s: invalid suspend request %u -> %u\n", |
1751 | __func__, pci_name(pdev), | |
1752 | pdev->current_state, state.event); | |
aa429110 | 1753 | mutex_unlock(&idev->mtx); |
1da177e4 LT |
1754 | return 0; |
1755 | } | |
1756 | ||
1757 | if (netif_running(ndev)) { | |
1758 | netif_device_detach(ndev); | |
1759 | vlsi_stop_hw(idev); | |
1760 | pci_save_state(pdev); | |
1761 | if (!idev->new_baud) | |
1762 | /* remember speed settings to restore on resume */ | |
1763 | idev->new_baud = idev->baud; | |
1764 | } | |
1765 | ||
829ca9a3 | 1766 | pci_set_power_state(pdev, pci_choose_state(pdev, state)); |
ca078bae | 1767 | pdev->current_state = state.event; |
1da177e4 | 1768 | idev->resume_ok = 1; |
aa429110 | 1769 | mutex_unlock(&idev->mtx); |
1da177e4 LT |
1770 | return 0; |
1771 | } | |
1772 | ||
1773 | static int vlsi_irda_resume(struct pci_dev *pdev) | |
1774 | { | |
1775 | struct net_device *ndev = pci_get_drvdata(pdev); | |
1776 | vlsi_irda_dev_t *idev; | |
1777 | ||
1778 | if (!ndev) { | |
6c91023d JP |
1779 | net_err_ratelimited("%s - %s: no netdevice\n", |
1780 | __func__, pci_name(pdev)); | |
1da177e4 LT |
1781 | return 0; |
1782 | } | |
4cf1653a | 1783 | idev = netdev_priv(ndev); |
aa429110 | 1784 | mutex_lock(&idev->mtx); |
1da177e4 | 1785 | if (pdev->current_state == 0) { |
aa429110 | 1786 | mutex_unlock(&idev->mtx); |
6c91023d JP |
1787 | net_warn_ratelimited("%s - %s: already resumed\n", |
1788 | __func__, pci_name(pdev)); | |
1da177e4 LT |
1789 | return 0; |
1790 | } | |
1791 | ||
829ca9a3 PM |
1792 | pci_set_power_state(pdev, PCI_D0); |
1793 | pdev->current_state = PM_EVENT_ON; | |
1da177e4 LT |
1794 | |
1795 | if (!idev->resume_ok) { | |
1796 | /* should be obsolete now - but used to happen due to: | |
1797 | * - pci layer initially setting pdev->current_state = 4 (unknown) | |
1798 | * - pci layer did not walk the save_state-tree (might be APM problem) | |
1799 | * so we could not refuse to suspend from undefined state | |
1800 | * - vlsi_irda_suspend detected invalid state and refused to save | |
1801 | * configuration for resume - but was too late to stop suspending | |
1802 | * - vlsi_irda_resume got screwed when trying to resume from garbage | |
1803 | * | |
1804 | * now we explicitly set pdev->current_state = 0 after enabling the | |
1805 | * device and independently resume_ok should catch any garbage config. | |
1806 | */ | |
6c91023d | 1807 | net_warn_ratelimited("%s - hm, nothing to resume?\n", __func__); |
aa429110 | 1808 | mutex_unlock(&idev->mtx); |
1da177e4 LT |
1809 | return 0; |
1810 | } | |
1811 | ||
1812 | if (netif_running(ndev)) { | |
1813 | pci_restore_state(pdev); | |
1814 | vlsi_start_hw(idev); | |
1815 | netif_device_attach(ndev); | |
1816 | } | |
1817 | idev->resume_ok = 0; | |
aa429110 | 1818 | mutex_unlock(&idev->mtx); |
1da177e4 LT |
1819 | return 0; |
1820 | } | |
1821 | ||
1822 | #endif /* CONFIG_PM */ | |
1823 | ||
1824 | /*********************************************************/ | |
1825 | ||
1826 | static struct pci_driver vlsi_irda_driver = { | |
1827 | .name = drivername, | |
1828 | .id_table = vlsi_irda_table, | |
1829 | .probe = vlsi_irda_probe, | |
45ac936c | 1830 | .remove = vlsi_irda_remove, |
1da177e4 LT |
1831 | #ifdef CONFIG_PM |
1832 | .suspend = vlsi_irda_suspend, | |
1833 | .resume = vlsi_irda_resume, | |
1834 | #endif | |
1835 | }; | |
1836 | ||
1837 | #define PROC_DIR ("driver/" DRIVER_NAME) | |
1838 | ||
1839 | static int __init vlsi_mod_init(void) | |
1840 | { | |
1841 | int i, ret; | |
1842 | ||
1843 | if (clksrc < 0 || clksrc > 3) { | |
6c91023d JP |
1844 | net_err_ratelimited("%s: invalid clksrc=%d\n", |
1845 | drivername, clksrc); | |
1da177e4 LT |
1846 | return -1; |
1847 | } | |
1848 | ||
1849 | for (i = 0; i < 2; i++) { | |
1850 | switch(ringsize[i]) { | |
1851 | case 4: | |
1852 | case 8: | |
1853 | case 16: | |
1854 | case 32: | |
1855 | case 64: | |
1856 | break; | |
1857 | default: | |
6c91023d JP |
1858 | net_warn_ratelimited("%s: invalid %s ringsize %d, using default=8\n", |
1859 | drivername, | |
1860 | i ? "rx" : "tx", | |
1861 | ringsize[i]); | |
1da177e4 LT |
1862 | ringsize[i] = 8; |
1863 | break; | |
1864 | } | |
1865 | } | |
1866 | ||
1867 | sirpulse = !!sirpulse; | |
1868 | ||
66600221 | 1869 | /* proc_mkdir returns NULL if !CONFIG_PROC_FS. |
1da177e4 LT |
1870 | * Failure to create the procfs entry is handled like running |
1871 | * without procfs - it's not required for the driver to work. | |
1872 | */ | |
66600221 | 1873 | vlsi_proc_root = proc_mkdir(PROC_DIR, NULL); |
1da177e4 | 1874 | |
a85d771e | 1875 | ret = pci_register_driver(&vlsi_irda_driver); |
1da177e4 LT |
1876 | |
1877 | if (ret && vlsi_proc_root) | |
1878 | remove_proc_entry(PROC_DIR, NULL); | |
1879 | return ret; | |
1880 | ||
1881 | } | |
1882 | ||
1883 | static void __exit vlsi_mod_exit(void) | |
1884 | { | |
1885 | pci_unregister_driver(&vlsi_irda_driver); | |
1886 | if (vlsi_proc_root) | |
1887 | remove_proc_entry(PROC_DIR, NULL); | |
1888 | } | |
1889 | ||
1890 | module_init(vlsi_mod_init); | |
1891 | module_exit(vlsi_mod_exit); |