Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /********************************************************************* |
| 2 | * |
| 3 | * vlsi_ir.c: VLSI82C147 PCI IrDA controller driver for Linux |
| 4 | * |
| 5 | * Copyright (c) 2001-2003 Martin Diehl |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License as |
| 9 | * published by the Free Software Foundation; either version 2 of |
| 10 | * the License, or (at your option) any later version. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License |
| 18 | * along with this program; if not, write to the Free Software |
| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 20 | * MA 02111-1307 USA |
| 21 | * |
| 22 | ********************************************************************/ |
| 23 | |
| 24 | #include <linux/config.h> |
| 25 | #include <linux/module.h> |
| 26 | |
| 27 | #define DRIVER_NAME "vlsi_ir" |
| 28 | #define DRIVER_VERSION "v0.5" |
| 29 | #define DRIVER_DESCRIPTION "IrDA SIR/MIR/FIR driver for VLSI 82C147" |
| 30 | #define DRIVER_AUTHOR "Martin Diehl <info@mdiehl.de>" |
| 31 | |
| 32 | MODULE_DESCRIPTION(DRIVER_DESCRIPTION); |
| 33 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 34 | MODULE_LICENSE("GPL"); |
| 35 | |
| 36 | /********************************************************/ |
| 37 | |
| 38 | #include <linux/kernel.h> |
| 39 | #include <linux/init.h> |
| 40 | #include <linux/pci.h> |
| 41 | #include <linux/slab.h> |
| 42 | #include <linux/netdevice.h> |
| 43 | #include <linux/skbuff.h> |
| 44 | #include <linux/delay.h> |
| 45 | #include <linux/time.h> |
| 46 | #include <linux/proc_fs.h> |
| 47 | #include <linux/seq_file.h> |
| 48 | #include <linux/smp_lock.h> |
| 49 | #include <asm/uaccess.h> |
| 50 | #include <asm/byteorder.h> |
| 51 | |
| 52 | #include <net/irda/irda.h> |
| 53 | #include <net/irda/irda_device.h> |
| 54 | #include <net/irda/wrapper.h> |
| 55 | #include <net/irda/crc.h> |
| 56 | |
| 57 | #include "vlsi_ir.h" |
| 58 | |
| 59 | /********************************************************/ |
| 60 | |
| 61 | static /* const */ char drivername[] = DRIVER_NAME; |
| 62 | |
| 63 | static struct pci_device_id vlsi_irda_table [] = { |
| 64 | { |
| 65 | .class = PCI_CLASS_WIRELESS_IRDA << 8, |
| 66 | .class_mask = PCI_CLASS_SUBCLASS_MASK << 8, |
| 67 | .vendor = PCI_VENDOR_ID_VLSI, |
| 68 | .device = PCI_DEVICE_ID_VLSI_82C147, |
| 69 | .subvendor = PCI_ANY_ID, |
| 70 | .subdevice = PCI_ANY_ID, |
| 71 | }, |
| 72 | { /* all zeroes */ } |
| 73 | }; |
| 74 | |
| 75 | MODULE_DEVICE_TABLE(pci, vlsi_irda_table); |
| 76 | |
| 77 | /********************************************************/ |
| 78 | |
| 79 | /* clksrc: which clock source to be used |
| 80 | * 0: auto - try PLL, fallback to 40MHz XCLK |
| 81 | * 1: on-chip 48MHz PLL |
| 82 | * 2: external 48MHz XCLK |
| 83 | * 3: external 40MHz XCLK (HP OB-800) |
| 84 | */ |
| 85 | |
| 86 | static int clksrc = 0; /* default is 0(auto) */ |
| 87 | module_param(clksrc, int, 0); |
| 88 | MODULE_PARM_DESC(clksrc, "clock input source selection"); |
| 89 | |
| 90 | /* ringsize: size of the tx and rx descriptor rings |
| 91 | * independent for tx and rx |
| 92 | * specify as ringsize=tx[,rx] |
| 93 | * allowed values: 4, 8, 16, 32, 64 |
| 94 | * Due to the IrDA 1.x max. allowed window size=7, |
| 95 | * there should be no gain when using rings larger than 8 |
| 96 | */ |
| 97 | |
| 98 | static int ringsize[] = {8,8}; /* default is tx=8 / rx=8 */ |
| 99 | module_param_array(ringsize, int, NULL, 0); |
| 100 | MODULE_PARM_DESC(ringsize, "TX, RX ring descriptor size"); |
| 101 | |
| 102 | /* sirpulse: tuning of the SIR pulse width within IrPHY 1.3 limits |
| 103 | * 0: very short, 1.5us (exception: 6us at 2.4 kbaud) |
| 104 | * 1: nominal 3/16 bittime width |
| 105 | * note: IrDA compliant peer devices should be happy regardless |
| 106 | * which one is used. Primary goal is to save some power |
| 107 | * on the sender's side - at 9.6kbaud for example the short |
| 108 | * pulse width saves more than 90% of the transmitted IR power. |
| 109 | */ |
| 110 | |
| 111 | static int sirpulse = 1; /* default is 3/16 bittime */ |
| 112 | module_param(sirpulse, int, 0); |
| 113 | MODULE_PARM_DESC(sirpulse, "SIR pulse width tuning"); |
| 114 | |
| 115 | /* qos_mtt_bits: encoded min-turn-time value we require the peer device |
| 116 | * to use before transmitting to us. "Type 1" (per-station) |
| 117 | * bitfield according to IrLAP definition (section 6.6.8) |
| 118 | * Don't know which transceiver is used by my OB800 - the |
| 119 | * pretty common HP HDLS-1100 requires 1 msec - so lets use this. |
| 120 | */ |
| 121 | |
| 122 | static int qos_mtt_bits = 0x07; /* default is 1 ms or more */ |
| 123 | module_param(qos_mtt_bits, int, 0); |
| 124 | MODULE_PARM_DESC(qos_mtt_bits, "IrLAP bitfield representing min-turn-time"); |
| 125 | |
| 126 | /********************************************************/ |
| 127 | |
| 128 | static void vlsi_reg_debug(unsigned iobase, const char *s) |
| 129 | { |
| 130 | int i; |
| 131 | |
| 132 | printk(KERN_DEBUG "%s: ", s); |
| 133 | for (i = 0; i < 0x20; i++) |
| 134 | printk("%02x", (unsigned)inb((iobase+i))); |
| 135 | printk("\n"); |
| 136 | } |
| 137 | |
| 138 | static void vlsi_ring_debug(struct vlsi_ring *r) |
| 139 | { |
| 140 | struct ring_descr *rd; |
| 141 | unsigned i; |
| 142 | |
| 143 | printk(KERN_DEBUG "%s - ring %p / size %u / mask 0x%04x / len %u / dir %d / hw %p\n", |
| 144 | __FUNCTION__, r, r->size, r->mask, r->len, r->dir, r->rd[0].hw); |
| 145 | printk(KERN_DEBUG "%s - head = %d / tail = %d\n", __FUNCTION__, |
| 146 | atomic_read(&r->head) & r->mask, atomic_read(&r->tail) & r->mask); |
| 147 | for (i = 0; i < r->size; i++) { |
| 148 | rd = &r->rd[i]; |
| 149 | printk(KERN_DEBUG "%s - ring descr %u: ", __FUNCTION__, i); |
| 150 | printk("skb=%p data=%p hw=%p\n", rd->skb, rd->buf, rd->hw); |
| 151 | printk(KERN_DEBUG "%s - hw: status=%02x count=%u addr=0x%08x\n", |
| 152 | __FUNCTION__, (unsigned) rd_get_status(rd), |
| 153 | (unsigned) rd_get_count(rd), (unsigned) rd_get_addr(rd)); |
| 154 | } |
| 155 | } |
| 156 | |
| 157 | /********************************************************/ |
| 158 | |
| 159 | /* needed regardless of CONFIG_PROC_FS */ |
| 160 | static struct proc_dir_entry *vlsi_proc_root = NULL; |
| 161 | |
| 162 | #ifdef CONFIG_PROC_FS |
| 163 | |
| 164 | static void vlsi_proc_pdev(struct seq_file *seq, struct pci_dev *pdev) |
| 165 | { |
| 166 | unsigned iobase = pci_resource_start(pdev, 0); |
| 167 | unsigned i; |
| 168 | |
| 169 | seq_printf(seq, "\n%s (vid/did: %04x/%04x)\n", |
| 170 | PCIDEV_NAME(pdev), (int)pdev->vendor, (int)pdev->device); |
| 171 | seq_printf(seq, "pci-power-state: %u\n", (unsigned) pdev->current_state); |
| 172 | seq_printf(seq, "resources: irq=%u / io=0x%04x / dma_mask=0x%016Lx\n", |
| 173 | pdev->irq, (unsigned)pci_resource_start(pdev, 0), (unsigned long long)pdev->dma_mask); |
| 174 | seq_printf(seq, "hw registers: "); |
| 175 | for (i = 0; i < 0x20; i++) |
| 176 | seq_printf(seq, "%02x", (unsigned)inb((iobase+i))); |
| 177 | seq_printf(seq, "\n"); |
| 178 | } |
| 179 | |
| 180 | static void vlsi_proc_ndev(struct seq_file *seq, struct net_device *ndev) |
| 181 | { |
| 182 | vlsi_irda_dev_t *idev = ndev->priv; |
| 183 | u8 byte; |
| 184 | u16 word; |
| 185 | unsigned delta1, delta2; |
| 186 | struct timeval now; |
| 187 | unsigned iobase = ndev->base_addr; |
| 188 | |
| 189 | seq_printf(seq, "\n%s link state: %s / %s / %s / %s\n", ndev->name, |
| 190 | netif_device_present(ndev) ? "attached" : "detached", |
| 191 | netif_running(ndev) ? "running" : "not running", |
| 192 | netif_carrier_ok(ndev) ? "carrier ok" : "no carrier", |
| 193 | netif_queue_stopped(ndev) ? "queue stopped" : "queue running"); |
| 194 | |
| 195 | if (!netif_running(ndev)) |
| 196 | return; |
| 197 | |
| 198 | seq_printf(seq, "\nhw-state:\n"); |
| 199 | pci_read_config_byte(idev->pdev, VLSI_PCI_IRMISC, &byte); |
| 200 | seq_printf(seq, "IRMISC:%s%s%s uart%s", |
| 201 | (byte&IRMISC_IRRAIL) ? " irrail" : "", |
| 202 | (byte&IRMISC_IRPD) ? " irpd" : "", |
| 203 | (byte&IRMISC_UARTTST) ? " uarttest" : "", |
| 204 | (byte&IRMISC_UARTEN) ? "@" : " disabled\n"); |
| 205 | if (byte&IRMISC_UARTEN) { |
| 206 | seq_printf(seq, "0x%s\n", |
| 207 | (byte&2) ? ((byte&1) ? "3e8" : "2e8") |
| 208 | : ((byte&1) ? "3f8" : "2f8")); |
| 209 | } |
| 210 | pci_read_config_byte(idev->pdev, VLSI_PCI_CLKCTL, &byte); |
| 211 | seq_printf(seq, "CLKCTL: PLL %s%s%s / clock %s / wakeup %s\n", |
| 212 | (byte&CLKCTL_PD_INV) ? "powered" : "down", |
| 213 | (byte&CLKCTL_LOCK) ? " locked" : "", |
| 214 | (byte&CLKCTL_EXTCLK) ? ((byte&CLKCTL_XCKSEL)?" / 40 MHz XCLK":" / 48 MHz XCLK") : "", |
| 215 | (byte&CLKCTL_CLKSTP) ? "stopped" : "running", |
| 216 | (byte&CLKCTL_WAKE) ? "enabled" : "disabled"); |
| 217 | pci_read_config_byte(idev->pdev, VLSI_PCI_MSTRPAGE, &byte); |
| 218 | seq_printf(seq, "MSTRPAGE: 0x%02x\n", (unsigned)byte); |
| 219 | |
| 220 | byte = inb(iobase+VLSI_PIO_IRINTR); |
| 221 | seq_printf(seq, "IRINTR:%s%s%s%s%s%s%s%s\n", |
| 222 | (byte&IRINTR_ACTEN) ? " ACTEN" : "", |
| 223 | (byte&IRINTR_RPKTEN) ? " RPKTEN" : "", |
| 224 | (byte&IRINTR_TPKTEN) ? " TPKTEN" : "", |
| 225 | (byte&IRINTR_OE_EN) ? " OE_EN" : "", |
| 226 | (byte&IRINTR_ACTIVITY) ? " ACTIVITY" : "", |
| 227 | (byte&IRINTR_RPKTINT) ? " RPKTINT" : "", |
| 228 | (byte&IRINTR_TPKTINT) ? " TPKTINT" : "", |
| 229 | (byte&IRINTR_OE_INT) ? " OE_INT" : ""); |
| 230 | word = inw(iobase+VLSI_PIO_RINGPTR); |
| 231 | seq_printf(seq, "RINGPTR: rx=%u / tx=%u\n", RINGPTR_GET_RX(word), RINGPTR_GET_TX(word)); |
| 232 | word = inw(iobase+VLSI_PIO_RINGBASE); |
| 233 | seq_printf(seq, "RINGBASE: busmap=0x%08x\n", |
| 234 | ((unsigned)word << 10)|(MSTRPAGE_VALUE<<24)); |
| 235 | word = inw(iobase+VLSI_PIO_RINGSIZE); |
| 236 | seq_printf(seq, "RINGSIZE: rx=%u / tx=%u\n", RINGSIZE_TO_RXSIZE(word), |
| 237 | RINGSIZE_TO_TXSIZE(word)); |
| 238 | |
| 239 | word = inw(iobase+VLSI_PIO_IRCFG); |
| 240 | seq_printf(seq, "IRCFG:%s%s%s%s%s%s%s%s%s%s%s%s%s\n", |
| 241 | (word&IRCFG_LOOP) ? " LOOP" : "", |
| 242 | (word&IRCFG_ENTX) ? " ENTX" : "", |
| 243 | (word&IRCFG_ENRX) ? " ENRX" : "", |
| 244 | (word&IRCFG_MSTR) ? " MSTR" : "", |
| 245 | (word&IRCFG_RXANY) ? " RXANY" : "", |
| 246 | (word&IRCFG_CRC16) ? " CRC16" : "", |
| 247 | (word&IRCFG_FIR) ? " FIR" : "", |
| 248 | (word&IRCFG_MIR) ? " MIR" : "", |
| 249 | (word&IRCFG_SIR) ? " SIR" : "", |
| 250 | (word&IRCFG_SIRFILT) ? " SIRFILT" : "", |
| 251 | (word&IRCFG_SIRTEST) ? " SIRTEST" : "", |
| 252 | (word&IRCFG_TXPOL) ? " TXPOL" : "", |
| 253 | (word&IRCFG_RXPOL) ? " RXPOL" : ""); |
| 254 | word = inw(iobase+VLSI_PIO_IRENABLE); |
| 255 | seq_printf(seq, "IRENABLE:%s%s%s%s%s%s%s%s\n", |
| 256 | (word&IRENABLE_PHYANDCLOCK) ? " PHYANDCLOCK" : "", |
| 257 | (word&IRENABLE_CFGER) ? " CFGERR" : "", |
| 258 | (word&IRENABLE_FIR_ON) ? " FIR_ON" : "", |
| 259 | (word&IRENABLE_MIR_ON) ? " MIR_ON" : "", |
| 260 | (word&IRENABLE_SIR_ON) ? " SIR_ON" : "", |
| 261 | (word&IRENABLE_ENTXST) ? " ENTXST" : "", |
| 262 | (word&IRENABLE_ENRXST) ? " ENRXST" : "", |
| 263 | (word&IRENABLE_CRC16_ON) ? " CRC16_ON" : ""); |
| 264 | word = inw(iobase+VLSI_PIO_PHYCTL); |
| 265 | seq_printf(seq, "PHYCTL: baud-divisor=%u / pulsewidth=%u / preamble=%u\n", |
| 266 | (unsigned)PHYCTL_TO_BAUD(word), |
| 267 | (unsigned)PHYCTL_TO_PLSWID(word), |
| 268 | (unsigned)PHYCTL_TO_PREAMB(word)); |
| 269 | word = inw(iobase+VLSI_PIO_NPHYCTL); |
| 270 | seq_printf(seq, "NPHYCTL: baud-divisor=%u / pulsewidth=%u / preamble=%u\n", |
| 271 | (unsigned)PHYCTL_TO_BAUD(word), |
| 272 | (unsigned)PHYCTL_TO_PLSWID(word), |
| 273 | (unsigned)PHYCTL_TO_PREAMB(word)); |
| 274 | word = inw(iobase+VLSI_PIO_MAXPKT); |
| 275 | seq_printf(seq, "MAXPKT: max. rx packet size = %u\n", word); |
| 276 | word = inw(iobase+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK; |
| 277 | seq_printf(seq, "RCVBCNT: rx-fifo filling level = %u\n", word); |
| 278 | |
| 279 | seq_printf(seq, "\nsw-state:\n"); |
| 280 | seq_printf(seq, "IrPHY setup: %d baud - %s encoding\n", idev->baud, |
| 281 | (idev->mode==IFF_SIR)?"SIR":((idev->mode==IFF_MIR)?"MIR":"FIR")); |
| 282 | do_gettimeofday(&now); |
| 283 | if (now.tv_usec >= idev->last_rx.tv_usec) { |
| 284 | delta2 = now.tv_usec - idev->last_rx.tv_usec; |
| 285 | delta1 = 0; |
| 286 | } |
| 287 | else { |
| 288 | delta2 = 1000000 + now.tv_usec - idev->last_rx.tv_usec; |
| 289 | delta1 = 1; |
| 290 | } |
| 291 | seq_printf(seq, "last rx: %lu.%06u sec\n", |
| 292 | now.tv_sec - idev->last_rx.tv_sec - delta1, delta2); |
| 293 | |
| 294 | seq_printf(seq, "RX: packets=%lu / bytes=%lu / errors=%lu / dropped=%lu", |
| 295 | idev->stats.rx_packets, idev->stats.rx_bytes, idev->stats.rx_errors, |
| 296 | idev->stats.rx_dropped); |
| 297 | seq_printf(seq, " / overrun=%lu / length=%lu / frame=%lu / crc=%lu\n", |
| 298 | idev->stats.rx_over_errors, idev->stats.rx_length_errors, |
| 299 | idev->stats.rx_frame_errors, idev->stats.rx_crc_errors); |
| 300 | seq_printf(seq, "TX: packets=%lu / bytes=%lu / errors=%lu / dropped=%lu / fifo=%lu\n", |
| 301 | idev->stats.tx_packets, idev->stats.tx_bytes, idev->stats.tx_errors, |
| 302 | idev->stats.tx_dropped, idev->stats.tx_fifo_errors); |
| 303 | |
| 304 | } |
| 305 | |
| 306 | static void vlsi_proc_ring(struct seq_file *seq, struct vlsi_ring *r) |
| 307 | { |
| 308 | struct ring_descr *rd; |
| 309 | unsigned i, j; |
| 310 | int h, t; |
| 311 | |
| 312 | seq_printf(seq, "size %u / mask 0x%04x / len %u / dir %d / hw %p\n", |
| 313 | r->size, r->mask, r->len, r->dir, r->rd[0].hw); |
| 314 | h = atomic_read(&r->head) & r->mask; |
| 315 | t = atomic_read(&r->tail) & r->mask; |
| 316 | seq_printf(seq, "head = %d / tail = %d ", h, t); |
| 317 | if (h == t) |
| 318 | seq_printf(seq, "(empty)\n"); |
| 319 | else { |
| 320 | if (((t+1)&r->mask) == h) |
| 321 | seq_printf(seq, "(full)\n"); |
| 322 | else |
| 323 | seq_printf(seq, "(level = %d)\n", ((unsigned)(t-h) & r->mask)); |
| 324 | rd = &r->rd[h]; |
| 325 | j = (unsigned) rd_get_count(rd); |
| 326 | seq_printf(seq, "current: rd = %d / status = %02x / len = %u\n", |
| 327 | h, (unsigned)rd_get_status(rd), j); |
| 328 | if (j > 0) { |
| 329 | seq_printf(seq, " data:"); |
| 330 | if (j > 20) |
| 331 | j = 20; |
| 332 | for (i = 0; i < j; i++) |
| 333 | seq_printf(seq, " %02x", (unsigned)((unsigned char *)rd->buf)[i]); |
| 334 | seq_printf(seq, "\n"); |
| 335 | } |
| 336 | } |
| 337 | for (i = 0; i < r->size; i++) { |
| 338 | rd = &r->rd[i]; |
| 339 | seq_printf(seq, "> ring descr %u: ", i); |
| 340 | seq_printf(seq, "skb=%p data=%p hw=%p\n", rd->skb, rd->buf, rd->hw); |
| 341 | seq_printf(seq, " hw: status=%02x count=%u busaddr=0x%08x\n", |
| 342 | (unsigned) rd_get_status(rd), |
| 343 | (unsigned) rd_get_count(rd), (unsigned) rd_get_addr(rd)); |
| 344 | } |
| 345 | } |
| 346 | |
| 347 | static int vlsi_seq_show(struct seq_file *seq, void *v) |
| 348 | { |
| 349 | struct net_device *ndev = seq->private; |
| 350 | vlsi_irda_dev_t *idev = ndev->priv; |
| 351 | unsigned long flags; |
| 352 | |
| 353 | seq_printf(seq, "\n%s %s\n\n", DRIVER_NAME, DRIVER_VERSION); |
| 354 | seq_printf(seq, "clksrc: %s\n", |
| 355 | (clksrc>=2) ? ((clksrc==3)?"40MHz XCLK":"48MHz XCLK") |
| 356 | : ((clksrc==1)?"48MHz PLL":"autodetect")); |
| 357 | seq_printf(seq, "ringsize: tx=%d / rx=%d\n", |
| 358 | ringsize[0], ringsize[1]); |
| 359 | seq_printf(seq, "sirpulse: %s\n", (sirpulse)?"3/16 bittime":"short"); |
| 360 | seq_printf(seq, "qos_mtt_bits: 0x%02x\n", (unsigned)qos_mtt_bits); |
| 361 | |
| 362 | spin_lock_irqsave(&idev->lock, flags); |
| 363 | if (idev->pdev != NULL) { |
| 364 | vlsi_proc_pdev(seq, idev->pdev); |
| 365 | |
| 366 | if (idev->pdev->current_state == 0) |
| 367 | vlsi_proc_ndev(seq, ndev); |
| 368 | else |
| 369 | seq_printf(seq, "\nPCI controller down - resume_ok = %d\n", |
| 370 | idev->resume_ok); |
| 371 | if (netif_running(ndev) && idev->rx_ring && idev->tx_ring) { |
| 372 | seq_printf(seq, "\n--------- RX ring -----------\n\n"); |
| 373 | vlsi_proc_ring(seq, idev->rx_ring); |
| 374 | seq_printf(seq, "\n--------- TX ring -----------\n\n"); |
| 375 | vlsi_proc_ring(seq, idev->tx_ring); |
| 376 | } |
| 377 | } |
| 378 | seq_printf(seq, "\n"); |
| 379 | spin_unlock_irqrestore(&idev->lock, flags); |
| 380 | |
| 381 | return 0; |
| 382 | } |
| 383 | |
| 384 | static int vlsi_seq_open(struct inode *inode, struct file *file) |
| 385 | { |
| 386 | return single_open(file, vlsi_seq_show, PDE(inode)->data); |
| 387 | } |
| 388 | |
| 389 | static struct file_operations vlsi_proc_fops = { |
| 390 | .owner = THIS_MODULE, |
| 391 | .open = vlsi_seq_open, |
| 392 | .read = seq_read, |
| 393 | .llseek = seq_lseek, |
| 394 | .release = single_release, |
| 395 | }; |
| 396 | |
| 397 | #define VLSI_PROC_FOPS (&vlsi_proc_fops) |
| 398 | |
| 399 | #else /* CONFIG_PROC_FS */ |
| 400 | #define VLSI_PROC_FOPS NULL |
| 401 | #endif |
| 402 | |
| 403 | /********************************************************/ |
| 404 | |
| 405 | static struct vlsi_ring *vlsi_alloc_ring(struct pci_dev *pdev, struct ring_descr_hw *hwmap, |
| 406 | unsigned size, unsigned len, int dir) |
| 407 | { |
| 408 | struct vlsi_ring *r; |
| 409 | struct ring_descr *rd; |
| 410 | unsigned i, j; |
| 411 | dma_addr_t busaddr; |
| 412 | |
| 413 | if (!size || ((size-1)&size)!=0) /* must be >0 and power of 2 */ |
| 414 | return NULL; |
| 415 | |
| 416 | r = kmalloc(sizeof(*r) + size * sizeof(struct ring_descr), GFP_KERNEL); |
| 417 | if (!r) |
| 418 | return NULL; |
| 419 | memset(r, 0, sizeof(*r)); |
| 420 | |
| 421 | r->pdev = pdev; |
| 422 | r->dir = dir; |
| 423 | r->len = len; |
| 424 | r->rd = (struct ring_descr *)(r+1); |
| 425 | r->mask = size - 1; |
| 426 | r->size = size; |
| 427 | atomic_set(&r->head, 0); |
| 428 | atomic_set(&r->tail, 0); |
| 429 | |
| 430 | for (i = 0; i < size; i++) { |
| 431 | rd = r->rd + i; |
| 432 | memset(rd, 0, sizeof(*rd)); |
| 433 | rd->hw = hwmap + i; |
| 434 | rd->buf = kmalloc(len, GFP_KERNEL|GFP_DMA); |
| 435 | if (rd->buf == NULL |
| 436 | || !(busaddr = pci_map_single(pdev, rd->buf, len, dir))) { |
| 437 | if (rd->buf) { |
| 438 | IRDA_ERROR("%s: failed to create PCI-MAP for %p", |
| 439 | __FUNCTION__, rd->buf); |
| 440 | kfree(rd->buf); |
| 441 | rd->buf = NULL; |
| 442 | } |
| 443 | for (j = 0; j < i; j++) { |
| 444 | rd = r->rd + j; |
| 445 | busaddr = rd_get_addr(rd); |
| 446 | rd_set_addr_status(rd, 0, 0); |
| 447 | if (busaddr) |
| 448 | pci_unmap_single(pdev, busaddr, len, dir); |
| 449 | kfree(rd->buf); |
| 450 | rd->buf = NULL; |
| 451 | } |
| 452 | kfree(r); |
| 453 | return NULL; |
| 454 | } |
| 455 | rd_set_addr_status(rd, busaddr, 0); |
| 456 | /* initially, the dma buffer is owned by the CPU */ |
| 457 | rd->skb = NULL; |
| 458 | } |
| 459 | return r; |
| 460 | } |
| 461 | |
| 462 | static int vlsi_free_ring(struct vlsi_ring *r) |
| 463 | { |
| 464 | struct ring_descr *rd; |
| 465 | unsigned i; |
| 466 | dma_addr_t busaddr; |
| 467 | |
| 468 | for (i = 0; i < r->size; i++) { |
| 469 | rd = r->rd + i; |
| 470 | if (rd->skb) |
| 471 | dev_kfree_skb_any(rd->skb); |
| 472 | busaddr = rd_get_addr(rd); |
| 473 | rd_set_addr_status(rd, 0, 0); |
| 474 | if (busaddr) |
| 475 | pci_unmap_single(r->pdev, busaddr, r->len, r->dir); |
| 476 | if (rd->buf) |
| 477 | kfree(rd->buf); |
| 478 | } |
| 479 | kfree(r); |
| 480 | return 0; |
| 481 | } |
| 482 | |
| 483 | static int vlsi_create_hwif(vlsi_irda_dev_t *idev) |
| 484 | { |
| 485 | char *ringarea; |
| 486 | struct ring_descr_hw *hwmap; |
| 487 | |
| 488 | idev->virtaddr = NULL; |
| 489 | idev->busaddr = 0; |
| 490 | |
| 491 | ringarea = pci_alloc_consistent(idev->pdev, HW_RING_AREA_SIZE, &idev->busaddr); |
| 492 | if (!ringarea) { |
| 493 | IRDA_ERROR("%s: insufficient memory for descriptor rings\n", |
| 494 | __FUNCTION__); |
| 495 | goto out; |
| 496 | } |
| 497 | memset(ringarea, 0, HW_RING_AREA_SIZE); |
| 498 | |
| 499 | hwmap = (struct ring_descr_hw *)ringarea; |
| 500 | idev->rx_ring = vlsi_alloc_ring(idev->pdev, hwmap, ringsize[1], |
| 501 | XFER_BUF_SIZE, PCI_DMA_FROMDEVICE); |
| 502 | if (idev->rx_ring == NULL) |
| 503 | goto out_unmap; |
| 504 | |
| 505 | hwmap += MAX_RING_DESCR; |
| 506 | idev->tx_ring = vlsi_alloc_ring(idev->pdev, hwmap, ringsize[0], |
| 507 | XFER_BUF_SIZE, PCI_DMA_TODEVICE); |
| 508 | if (idev->tx_ring == NULL) |
| 509 | goto out_free_rx; |
| 510 | |
| 511 | idev->virtaddr = ringarea; |
| 512 | return 0; |
| 513 | |
| 514 | out_free_rx: |
| 515 | vlsi_free_ring(idev->rx_ring); |
| 516 | out_unmap: |
| 517 | idev->rx_ring = idev->tx_ring = NULL; |
| 518 | pci_free_consistent(idev->pdev, HW_RING_AREA_SIZE, ringarea, idev->busaddr); |
| 519 | idev->busaddr = 0; |
| 520 | out: |
| 521 | return -ENOMEM; |
| 522 | } |
| 523 | |
| 524 | static int vlsi_destroy_hwif(vlsi_irda_dev_t *idev) |
| 525 | { |
| 526 | vlsi_free_ring(idev->rx_ring); |
| 527 | vlsi_free_ring(idev->tx_ring); |
| 528 | idev->rx_ring = idev->tx_ring = NULL; |
| 529 | |
| 530 | if (idev->busaddr) |
| 531 | pci_free_consistent(idev->pdev,HW_RING_AREA_SIZE,idev->virtaddr,idev->busaddr); |
| 532 | |
| 533 | idev->virtaddr = NULL; |
| 534 | idev->busaddr = 0; |
| 535 | |
| 536 | return 0; |
| 537 | } |
| 538 | |
| 539 | /********************************************************/ |
| 540 | |
| 541 | static int vlsi_process_rx(struct vlsi_ring *r, struct ring_descr *rd) |
| 542 | { |
| 543 | u16 status; |
| 544 | int crclen, len = 0; |
| 545 | struct sk_buff *skb; |
| 546 | int ret = 0; |
| 547 | struct net_device *ndev = (struct net_device *)pci_get_drvdata(r->pdev); |
| 548 | vlsi_irda_dev_t *idev = ndev->priv; |
| 549 | |
| 550 | pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir); |
| 551 | /* dma buffer now owned by the CPU */ |
| 552 | status = rd_get_status(rd); |
| 553 | if (status & RD_RX_ERROR) { |
| 554 | if (status & RD_RX_OVER) |
| 555 | ret |= VLSI_RX_OVER; |
| 556 | if (status & RD_RX_LENGTH) |
| 557 | ret |= VLSI_RX_LENGTH; |
| 558 | if (status & RD_RX_PHYERR) |
| 559 | ret |= VLSI_RX_FRAME; |
| 560 | if (status & RD_RX_CRCERR) |
| 561 | ret |= VLSI_RX_CRC; |
| 562 | goto done; |
| 563 | } |
| 564 | |
| 565 | len = rd_get_count(rd); |
| 566 | crclen = (idev->mode==IFF_FIR) ? sizeof(u32) : sizeof(u16); |
| 567 | len -= crclen; /* remove trailing CRC */ |
| 568 | if (len <= 0) { |
| 569 | IRDA_DEBUG(0, "%s: strange frame (len=%d)\n", __FUNCTION__, len); |
| 570 | ret |= VLSI_RX_DROP; |
| 571 | goto done; |
| 572 | } |
| 573 | |
| 574 | if (idev->mode == IFF_SIR) { /* hw checks CRC in MIR, FIR mode */ |
| 575 | |
| 576 | /* rd->buf is a streaming PCI_DMA_FROMDEVICE map. Doing the |
| 577 | * endian-adjustment there just in place will dirty a cache line |
| 578 | * which belongs to the map and thus we must be sure it will |
| 579 | * get flushed before giving the buffer back to hardware. |
| 580 | * vlsi_fill_rx() will do this anyway - but here we rely on. |
| 581 | */ |
| 582 | le16_to_cpus(rd->buf+len); |
| 583 | if (irda_calc_crc16(INIT_FCS,rd->buf,len+crclen) != GOOD_FCS) { |
| 584 | IRDA_DEBUG(0, "%s: crc error\n", __FUNCTION__); |
| 585 | ret |= VLSI_RX_CRC; |
| 586 | goto done; |
| 587 | } |
| 588 | } |
| 589 | |
| 590 | if (!rd->skb) { |
| 591 | IRDA_WARNING("%s: rx packet lost\n", __FUNCTION__); |
| 592 | ret |= VLSI_RX_DROP; |
| 593 | goto done; |
| 594 | } |
| 595 | |
| 596 | skb = rd->skb; |
| 597 | rd->skb = NULL; |
| 598 | skb->dev = ndev; |
| 599 | memcpy(skb_put(skb,len), rd->buf, len); |
| 600 | skb->mac.raw = skb->data; |
| 601 | if (in_interrupt()) |
| 602 | netif_rx(skb); |
| 603 | else |
| 604 | netif_rx_ni(skb); |
| 605 | ndev->last_rx = jiffies; |
| 606 | |
| 607 | done: |
| 608 | rd_set_status(rd, 0); |
| 609 | rd_set_count(rd, 0); |
| 610 | /* buffer still owned by CPU */ |
| 611 | |
| 612 | return (ret) ? -ret : len; |
| 613 | } |
| 614 | |
| 615 | static void vlsi_fill_rx(struct vlsi_ring *r) |
| 616 | { |
| 617 | struct ring_descr *rd; |
| 618 | |
| 619 | for (rd = ring_last(r); rd != NULL; rd = ring_put(r)) { |
| 620 | if (rd_is_active(rd)) { |
| 621 | IRDA_WARNING("%s: driver bug: rx descr race with hw\n", |
| 622 | __FUNCTION__); |
| 623 | vlsi_ring_debug(r); |
| 624 | break; |
| 625 | } |
| 626 | if (!rd->skb) { |
| 627 | rd->skb = dev_alloc_skb(IRLAP_SKB_ALLOCSIZE); |
| 628 | if (rd->skb) { |
| 629 | skb_reserve(rd->skb,1); |
| 630 | rd->skb->protocol = htons(ETH_P_IRDA); |
| 631 | } |
| 632 | else |
| 633 | break; /* probably not worth logging? */ |
| 634 | } |
| 635 | /* give dma buffer back to busmaster */ |
| 636 | pci_dma_sync_single_for_device(r->pdev, rd_get_addr(rd), r->len, r->dir); |
| 637 | rd_activate(rd); |
| 638 | } |
| 639 | } |
| 640 | |
| 641 | static void vlsi_rx_interrupt(struct net_device *ndev) |
| 642 | { |
| 643 | vlsi_irda_dev_t *idev = ndev->priv; |
| 644 | struct vlsi_ring *r = idev->rx_ring; |
| 645 | struct ring_descr *rd; |
| 646 | int ret; |
| 647 | |
| 648 | for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) { |
| 649 | |
| 650 | if (rd_is_active(rd)) |
| 651 | break; |
| 652 | |
| 653 | ret = vlsi_process_rx(r, rd); |
| 654 | |
| 655 | if (ret < 0) { |
| 656 | ret = -ret; |
| 657 | idev->stats.rx_errors++; |
| 658 | if (ret & VLSI_RX_DROP) |
| 659 | idev->stats.rx_dropped++; |
| 660 | if (ret & VLSI_RX_OVER) |
| 661 | idev->stats.rx_over_errors++; |
| 662 | if (ret & VLSI_RX_LENGTH) |
| 663 | idev->stats.rx_length_errors++; |
| 664 | if (ret & VLSI_RX_FRAME) |
| 665 | idev->stats.rx_frame_errors++; |
| 666 | if (ret & VLSI_RX_CRC) |
| 667 | idev->stats.rx_crc_errors++; |
| 668 | } |
| 669 | else if (ret > 0) { |
| 670 | idev->stats.rx_packets++; |
| 671 | idev->stats.rx_bytes += ret; |
| 672 | } |
| 673 | } |
| 674 | |
| 675 | do_gettimeofday(&idev->last_rx); /* remember "now" for later mtt delay */ |
| 676 | |
| 677 | vlsi_fill_rx(r); |
| 678 | |
| 679 | if (ring_first(r) == NULL) { |
| 680 | /* we are in big trouble, if this should ever happen */ |
| 681 | IRDA_ERROR("%s: rx ring exhausted!\n", __FUNCTION__); |
| 682 | vlsi_ring_debug(r); |
| 683 | } |
| 684 | else |
| 685 | outw(0, ndev->base_addr+VLSI_PIO_PROMPT); |
| 686 | } |
| 687 | |
| 688 | /* caller must have stopped the controller from busmastering */ |
| 689 | |
| 690 | static void vlsi_unarm_rx(vlsi_irda_dev_t *idev) |
| 691 | { |
| 692 | struct vlsi_ring *r = idev->rx_ring; |
| 693 | struct ring_descr *rd; |
| 694 | int ret; |
| 695 | |
| 696 | for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) { |
| 697 | |
| 698 | ret = 0; |
| 699 | if (rd_is_active(rd)) { |
| 700 | rd_set_status(rd, 0); |
| 701 | if (rd_get_count(rd)) { |
| 702 | IRDA_DEBUG(0, "%s - dropping rx packet\n", __FUNCTION__); |
| 703 | ret = -VLSI_RX_DROP; |
| 704 | } |
| 705 | rd_set_count(rd, 0); |
| 706 | pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir); |
| 707 | if (rd->skb) { |
| 708 | dev_kfree_skb_any(rd->skb); |
| 709 | rd->skb = NULL; |
| 710 | } |
| 711 | } |
| 712 | else |
| 713 | ret = vlsi_process_rx(r, rd); |
| 714 | |
| 715 | if (ret < 0) { |
| 716 | ret = -ret; |
| 717 | idev->stats.rx_errors++; |
| 718 | if (ret & VLSI_RX_DROP) |
| 719 | idev->stats.rx_dropped++; |
| 720 | if (ret & VLSI_RX_OVER) |
| 721 | idev->stats.rx_over_errors++; |
| 722 | if (ret & VLSI_RX_LENGTH) |
| 723 | idev->stats.rx_length_errors++; |
| 724 | if (ret & VLSI_RX_FRAME) |
| 725 | idev->stats.rx_frame_errors++; |
| 726 | if (ret & VLSI_RX_CRC) |
| 727 | idev->stats.rx_crc_errors++; |
| 728 | } |
| 729 | else if (ret > 0) { |
| 730 | idev->stats.rx_packets++; |
| 731 | idev->stats.rx_bytes += ret; |
| 732 | } |
| 733 | } |
| 734 | } |
| 735 | |
| 736 | /********************************************************/ |
| 737 | |
| 738 | static int vlsi_process_tx(struct vlsi_ring *r, struct ring_descr *rd) |
| 739 | { |
| 740 | u16 status; |
| 741 | int len; |
| 742 | int ret; |
| 743 | |
| 744 | pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir); |
| 745 | /* dma buffer now owned by the CPU */ |
| 746 | status = rd_get_status(rd); |
| 747 | if (status & RD_TX_UNDRN) |
| 748 | ret = VLSI_TX_FIFO; |
| 749 | else |
| 750 | ret = 0; |
| 751 | rd_set_status(rd, 0); |
| 752 | |
| 753 | if (rd->skb) { |
| 754 | len = rd->skb->len; |
| 755 | dev_kfree_skb_any(rd->skb); |
| 756 | rd->skb = NULL; |
| 757 | } |
| 758 | else /* tx-skb already freed? - should never happen */ |
| 759 | len = rd_get_count(rd); /* incorrect for SIR! (due to wrapping) */ |
| 760 | |
| 761 | rd_set_count(rd, 0); |
| 762 | /* dma buffer still owned by the CPU */ |
| 763 | |
| 764 | return (ret) ? -ret : len; |
| 765 | } |
| 766 | |
| 767 | static int vlsi_set_baud(vlsi_irda_dev_t *idev, unsigned iobase) |
| 768 | { |
| 769 | u16 nphyctl; |
| 770 | u16 config; |
| 771 | unsigned mode; |
| 772 | int ret; |
| 773 | int baudrate; |
| 774 | int fifocnt; |
| 775 | |
| 776 | baudrate = idev->new_baud; |
| 777 | IRDA_DEBUG(2, "%s: %d -> %d\n", __FUNCTION__, idev->baud, idev->new_baud); |
| 778 | if (baudrate == 4000000) { |
| 779 | mode = IFF_FIR; |
| 780 | config = IRCFG_FIR; |
| 781 | nphyctl = PHYCTL_FIR; |
| 782 | } |
| 783 | else if (baudrate == 1152000) { |
| 784 | mode = IFF_MIR; |
| 785 | config = IRCFG_MIR | IRCFG_CRC16; |
| 786 | nphyctl = PHYCTL_MIR(clksrc==3); |
| 787 | } |
| 788 | else { |
| 789 | mode = IFF_SIR; |
| 790 | config = IRCFG_SIR | IRCFG_SIRFILT | IRCFG_RXANY; |
| 791 | switch(baudrate) { |
| 792 | default: |
| 793 | IRDA_WARNING("%s: undefined baudrate %d - fallback to 9600!\n", |
| 794 | __FUNCTION__, baudrate); |
| 795 | baudrate = 9600; |
| 796 | /* fallthru */ |
| 797 | case 2400: |
| 798 | case 9600: |
| 799 | case 19200: |
| 800 | case 38400: |
| 801 | case 57600: |
| 802 | case 115200: |
| 803 | nphyctl = PHYCTL_SIR(baudrate,sirpulse,clksrc==3); |
| 804 | break; |
| 805 | } |
| 806 | } |
| 807 | config |= IRCFG_MSTR | IRCFG_ENRX; |
| 808 | |
| 809 | fifocnt = inw(iobase+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK; |
| 810 | if (fifocnt != 0) { |
| 811 | IRDA_DEBUG(0, "%s: rx fifo not empty(%d)\n", __FUNCTION__, fifocnt); |
| 812 | } |
| 813 | |
| 814 | outw(0, iobase+VLSI_PIO_IRENABLE); |
| 815 | outw(config, iobase+VLSI_PIO_IRCFG); |
| 816 | outw(nphyctl, iobase+VLSI_PIO_NPHYCTL); |
| 817 | wmb(); |
| 818 | outw(IRENABLE_PHYANDCLOCK, iobase+VLSI_PIO_IRENABLE); |
| 819 | mb(); |
| 820 | |
| 821 | udelay(1); /* chip applies IRCFG on next rising edge of its 8MHz clock */ |
| 822 | |
| 823 | /* read back settings for validation */ |
| 824 | |
| 825 | config = inw(iobase+VLSI_PIO_IRENABLE) & IRENABLE_MASK; |
| 826 | |
| 827 | if (mode == IFF_FIR) |
| 828 | config ^= IRENABLE_FIR_ON; |
| 829 | else if (mode == IFF_MIR) |
| 830 | config ^= (IRENABLE_MIR_ON|IRENABLE_CRC16_ON); |
| 831 | else |
| 832 | config ^= IRENABLE_SIR_ON; |
| 833 | |
| 834 | if (config != (IRENABLE_PHYANDCLOCK|IRENABLE_ENRXST)) { |
| 835 | IRDA_WARNING("%s: failed to set %s mode!\n", __FUNCTION__, |
| 836 | (mode==IFF_SIR)?"SIR":((mode==IFF_MIR)?"MIR":"FIR")); |
| 837 | ret = -1; |
| 838 | } |
| 839 | else { |
| 840 | if (inw(iobase+VLSI_PIO_PHYCTL) != nphyctl) { |
| 841 | IRDA_WARNING("%s: failed to apply baudrate %d\n", |
| 842 | __FUNCTION__, baudrate); |
| 843 | ret = -1; |
| 844 | } |
| 845 | else { |
| 846 | idev->mode = mode; |
| 847 | idev->baud = baudrate; |
| 848 | idev->new_baud = 0; |
| 849 | ret = 0; |
| 850 | } |
| 851 | } |
| 852 | |
| 853 | if (ret) |
| 854 | vlsi_reg_debug(iobase,__FUNCTION__); |
| 855 | |
| 856 | return ret; |
| 857 | } |
| 858 | |
| 859 | static int vlsi_hard_start_xmit(struct sk_buff *skb, struct net_device *ndev) |
| 860 | { |
| 861 | vlsi_irda_dev_t *idev = ndev->priv; |
| 862 | struct vlsi_ring *r = idev->tx_ring; |
| 863 | struct ring_descr *rd; |
| 864 | unsigned long flags; |
| 865 | unsigned iobase = ndev->base_addr; |
| 866 | u8 status; |
| 867 | u16 config; |
| 868 | int mtt; |
| 869 | int len, speed; |
| 870 | struct timeval now, ready; |
| 871 | char *msg = NULL; |
| 872 | |
| 873 | speed = irda_get_next_speed(skb); |
| 874 | spin_lock_irqsave(&idev->lock, flags); |
| 875 | if (speed != -1 && speed != idev->baud) { |
| 876 | netif_stop_queue(ndev); |
| 877 | idev->new_baud = speed; |
| 878 | status = RD_TX_CLRENTX; /* stop tx-ring after this frame */ |
| 879 | } |
| 880 | else |
| 881 | status = 0; |
| 882 | |
| 883 | if (skb->len == 0) { |
| 884 | /* handle zero packets - should be speed change */ |
| 885 | if (status == 0) { |
| 886 | msg = "bogus zero-length packet"; |
| 887 | goto drop_unlock; |
| 888 | } |
| 889 | |
| 890 | /* due to the completely asynch tx operation we might have |
| 891 | * IrLAP racing with the hardware here, f.e. if the controller |
| 892 | * is just sending the last packet with current speed while |
| 893 | * the LAP is already switching the speed using synchronous |
| 894 | * len=0 packet. Immediate execution would lead to hw lockup |
| 895 | * requiring a powercycle to reset. Good candidate to trigger |
| 896 | * this is the final UA:RSP packet after receiving a DISC:CMD |
| 897 | * when getting the LAP down. |
| 898 | * Note that we are not protected by the queue_stop approach |
| 899 | * because the final UA:RSP arrives _without_ request to apply |
| 900 | * new-speed-after-this-packet - hence the driver doesn't know |
| 901 | * this was the last packet and doesn't stop the queue. So the |
| 902 | * forced switch to default speed from LAP gets through as fast |
| 903 | * as only some 10 usec later while the UA:RSP is still processed |
| 904 | * by the hardware and we would get screwed. |
| 905 | */ |
| 906 | |
| 907 | if (ring_first(idev->tx_ring) == NULL) { |
| 908 | /* no race - tx-ring already empty */ |
| 909 | vlsi_set_baud(idev, iobase); |
| 910 | netif_wake_queue(ndev); |
| 911 | } |
| 912 | else |
| 913 | ; |
| 914 | /* keep the speed change pending like it would |
| 915 | * for any len>0 packet. tx completion interrupt |
| 916 | * will apply it when the tx ring becomes empty. |
| 917 | */ |
| 918 | spin_unlock_irqrestore(&idev->lock, flags); |
| 919 | dev_kfree_skb_any(skb); |
| 920 | return 0; |
| 921 | } |
| 922 | |
| 923 | /* sanity checks - simply drop the packet */ |
| 924 | |
| 925 | rd = ring_last(r); |
| 926 | if (!rd) { |
| 927 | msg = "ring full, but queue wasn't stopped"; |
| 928 | goto drop_unlock; |
| 929 | } |
| 930 | |
| 931 | if (rd_is_active(rd)) { |
| 932 | msg = "entry still owned by hw"; |
| 933 | goto drop_unlock; |
| 934 | } |
| 935 | |
| 936 | if (!rd->buf) { |
| 937 | msg = "tx ring entry without pci buffer"; |
| 938 | goto drop_unlock; |
| 939 | } |
| 940 | |
| 941 | if (rd->skb) { |
| 942 | msg = "ring entry with old skb still attached"; |
| 943 | goto drop_unlock; |
| 944 | } |
| 945 | |
| 946 | /* no need for serialization or interrupt disable during mtt */ |
| 947 | spin_unlock_irqrestore(&idev->lock, flags); |
| 948 | |
| 949 | if ((mtt = irda_get_mtt(skb)) > 0) { |
| 950 | |
| 951 | ready.tv_usec = idev->last_rx.tv_usec + mtt; |
| 952 | ready.tv_sec = idev->last_rx.tv_sec; |
| 953 | if (ready.tv_usec >= 1000000) { |
| 954 | ready.tv_usec -= 1000000; |
| 955 | ready.tv_sec++; /* IrLAP 1.1: mtt always < 1 sec */ |
| 956 | } |
| 957 | for(;;) { |
| 958 | do_gettimeofday(&now); |
| 959 | if (now.tv_sec > ready.tv_sec |
| 960 | || (now.tv_sec==ready.tv_sec && now.tv_usec>=ready.tv_usec)) |
| 961 | break; |
| 962 | udelay(100); |
| 963 | /* must not sleep here - we are called under xmit_lock! */ |
| 964 | } |
| 965 | } |
| 966 | |
| 967 | /* tx buffer already owned by CPU due to pci_dma_sync_single_for_cpu() |
| 968 | * after subsequent tx-completion |
| 969 | */ |
| 970 | |
| 971 | if (idev->mode == IFF_SIR) { |
| 972 | status |= RD_TX_DISCRC; /* no hw-crc creation */ |
| 973 | len = async_wrap_skb(skb, rd->buf, r->len); |
| 974 | |
| 975 | /* Some rare worst case situation in SIR mode might lead to |
| 976 | * potential buffer overflow. The wrapper detects this, returns |
| 977 | * with a shortened frame (without FCS/EOF) but doesn't provide |
| 978 | * any error indication about the invalid packet which we are |
| 979 | * going to transmit. |
| 980 | * Therefore we log if the buffer got filled to the point, where the |
| 981 | * wrapper would abort, i.e. when there are less than 5 bytes left to |
| 982 | * allow appending the FCS/EOF. |
| 983 | */ |
| 984 | |
| 985 | if (len >= r->len-5) |
| 986 | IRDA_WARNING("%s: possible buffer overflow with SIR wrapping!\n", |
| 987 | __FUNCTION__); |
| 988 | } |
| 989 | else { |
| 990 | /* hw deals with MIR/FIR mode wrapping */ |
| 991 | status |= RD_TX_PULSE; /* send 2 us highspeed indication pulse */ |
| 992 | len = skb->len; |
| 993 | if (len > r->len) { |
| 994 | msg = "frame exceeds tx buffer length"; |
| 995 | goto drop; |
| 996 | } |
| 997 | else |
| 998 | memcpy(rd->buf, skb->data, len); |
| 999 | } |
| 1000 | |
| 1001 | rd->skb = skb; /* remember skb for tx-complete stats */ |
| 1002 | |
| 1003 | rd_set_count(rd, len); |
| 1004 | rd_set_status(rd, status); /* not yet active! */ |
| 1005 | |
| 1006 | /* give dma buffer back to busmaster-hw (flush caches to make |
| 1007 | * CPU-driven changes visible from the pci bus). |
| 1008 | */ |
| 1009 | |
| 1010 | pci_dma_sync_single_for_device(r->pdev, rd_get_addr(rd), r->len, r->dir); |
| 1011 | |
| 1012 | /* Switching to TX mode here races with the controller |
| 1013 | * which may stop TX at any time when fetching an inactive descriptor |
| 1014 | * or one with CLR_ENTX set. So we switch on TX only, if TX was not running |
| 1015 | * _after_ the new descriptor was activated on the ring. This ensures |
| 1016 | * we will either find TX already stopped or we can be sure, there |
| 1017 | * will be a TX-complete interrupt even if the chip stopped doing |
| 1018 | * TX just after we found it still running. The ISR will then find |
| 1019 | * the non-empty ring and restart TX processing. The enclosing |
| 1020 | * spinlock provides the correct serialization to prevent race with isr. |
| 1021 | */ |
| 1022 | |
| 1023 | spin_lock_irqsave(&idev->lock,flags); |
| 1024 | |
| 1025 | rd_activate(rd); |
| 1026 | |
| 1027 | if (!(inw(iobase+VLSI_PIO_IRENABLE) & IRENABLE_ENTXST)) { |
| 1028 | int fifocnt; |
| 1029 | |
| 1030 | fifocnt = inw(ndev->base_addr+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK; |
| 1031 | if (fifocnt != 0) { |
| 1032 | IRDA_DEBUG(0, "%s: rx fifo not empty(%d)\n", __FUNCTION__, fifocnt); |
| 1033 | } |
| 1034 | |
| 1035 | config = inw(iobase+VLSI_PIO_IRCFG); |
| 1036 | mb(); |
| 1037 | outw(config | IRCFG_ENTX, iobase+VLSI_PIO_IRCFG); |
| 1038 | wmb(); |
| 1039 | outw(0, iobase+VLSI_PIO_PROMPT); |
| 1040 | } |
| 1041 | ndev->trans_start = jiffies; |
| 1042 | |
| 1043 | if (ring_put(r) == NULL) { |
| 1044 | netif_stop_queue(ndev); |
| 1045 | IRDA_DEBUG(3, "%s: tx ring full - queue stopped\n", __FUNCTION__); |
| 1046 | } |
| 1047 | spin_unlock_irqrestore(&idev->lock, flags); |
| 1048 | |
| 1049 | return 0; |
| 1050 | |
| 1051 | drop_unlock: |
| 1052 | spin_unlock_irqrestore(&idev->lock, flags); |
| 1053 | drop: |
| 1054 | IRDA_WARNING("%s: dropping packet - %s\n", __FUNCTION__, msg); |
| 1055 | dev_kfree_skb_any(skb); |
| 1056 | idev->stats.tx_errors++; |
| 1057 | idev->stats.tx_dropped++; |
| 1058 | /* Don't even think about returning NET_XMIT_DROP (=1) here! |
| 1059 | * In fact any retval!=0 causes the packet scheduler to requeue the |
| 1060 | * packet for later retry of transmission - which isn't exactly |
| 1061 | * what we want after we've just called dev_kfree_skb_any ;-) |
| 1062 | */ |
| 1063 | return 0; |
| 1064 | } |
| 1065 | |
| 1066 | static void vlsi_tx_interrupt(struct net_device *ndev) |
| 1067 | { |
| 1068 | vlsi_irda_dev_t *idev = ndev->priv; |
| 1069 | struct vlsi_ring *r = idev->tx_ring; |
| 1070 | struct ring_descr *rd; |
| 1071 | unsigned iobase; |
| 1072 | int ret; |
| 1073 | u16 config; |
| 1074 | |
| 1075 | for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) { |
| 1076 | |
| 1077 | if (rd_is_active(rd)) |
| 1078 | break; |
| 1079 | |
| 1080 | ret = vlsi_process_tx(r, rd); |
| 1081 | |
| 1082 | if (ret < 0) { |
| 1083 | ret = -ret; |
| 1084 | idev->stats.tx_errors++; |
| 1085 | if (ret & VLSI_TX_DROP) |
| 1086 | idev->stats.tx_dropped++; |
| 1087 | if (ret & VLSI_TX_FIFO) |
| 1088 | idev->stats.tx_fifo_errors++; |
| 1089 | } |
| 1090 | else if (ret > 0){ |
| 1091 | idev->stats.tx_packets++; |
| 1092 | idev->stats.tx_bytes += ret; |
| 1093 | } |
| 1094 | } |
| 1095 | |
| 1096 | iobase = ndev->base_addr; |
| 1097 | |
| 1098 | if (idev->new_baud && rd == NULL) /* tx ring empty and speed change pending */ |
| 1099 | vlsi_set_baud(idev, iobase); |
| 1100 | |
| 1101 | config = inw(iobase+VLSI_PIO_IRCFG); |
| 1102 | if (rd == NULL) /* tx ring empty: re-enable rx */ |
| 1103 | outw((config & ~IRCFG_ENTX) | IRCFG_ENRX, iobase+VLSI_PIO_IRCFG); |
| 1104 | |
| 1105 | else if (!(inw(iobase+VLSI_PIO_IRENABLE) & IRENABLE_ENTXST)) { |
| 1106 | int fifocnt; |
| 1107 | |
| 1108 | fifocnt = inw(iobase+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK; |
| 1109 | if (fifocnt != 0) { |
| 1110 | IRDA_DEBUG(0, "%s: rx fifo not empty(%d)\n", |
| 1111 | __FUNCTION__, fifocnt); |
| 1112 | } |
| 1113 | outw(config | IRCFG_ENTX, iobase+VLSI_PIO_IRCFG); |
| 1114 | } |
| 1115 | |
| 1116 | outw(0, iobase+VLSI_PIO_PROMPT); |
| 1117 | |
| 1118 | if (netif_queue_stopped(ndev) && !idev->new_baud) { |
| 1119 | netif_wake_queue(ndev); |
| 1120 | IRDA_DEBUG(3, "%s: queue awoken\n", __FUNCTION__); |
| 1121 | } |
| 1122 | } |
| 1123 | |
| 1124 | /* caller must have stopped the controller from busmastering */ |
| 1125 | |
| 1126 | static void vlsi_unarm_tx(vlsi_irda_dev_t *idev) |
| 1127 | { |
| 1128 | struct vlsi_ring *r = idev->tx_ring; |
| 1129 | struct ring_descr *rd; |
| 1130 | int ret; |
| 1131 | |
| 1132 | for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) { |
| 1133 | |
| 1134 | ret = 0; |
| 1135 | if (rd_is_active(rd)) { |
| 1136 | rd_set_status(rd, 0); |
| 1137 | rd_set_count(rd, 0); |
| 1138 | pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir); |
| 1139 | if (rd->skb) { |
| 1140 | dev_kfree_skb_any(rd->skb); |
| 1141 | rd->skb = NULL; |
| 1142 | } |
| 1143 | IRDA_DEBUG(0, "%s - dropping tx packet\n", __FUNCTION__); |
| 1144 | ret = -VLSI_TX_DROP; |
| 1145 | } |
| 1146 | else |
| 1147 | ret = vlsi_process_tx(r, rd); |
| 1148 | |
| 1149 | if (ret < 0) { |
| 1150 | ret = -ret; |
| 1151 | idev->stats.tx_errors++; |
| 1152 | if (ret & VLSI_TX_DROP) |
| 1153 | idev->stats.tx_dropped++; |
| 1154 | if (ret & VLSI_TX_FIFO) |
| 1155 | idev->stats.tx_fifo_errors++; |
| 1156 | } |
| 1157 | else if (ret > 0){ |
| 1158 | idev->stats.tx_packets++; |
| 1159 | idev->stats.tx_bytes += ret; |
| 1160 | } |
| 1161 | } |
| 1162 | |
| 1163 | } |
| 1164 | |
| 1165 | /********************************************************/ |
| 1166 | |
| 1167 | static int vlsi_start_clock(struct pci_dev *pdev) |
| 1168 | { |
| 1169 | u8 clkctl, lock; |
| 1170 | int i, count; |
| 1171 | |
| 1172 | if (clksrc < 2) { /* auto or PLL: try PLL */ |
| 1173 | clkctl = CLKCTL_PD_INV | CLKCTL_CLKSTP; |
| 1174 | pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl); |
| 1175 | |
| 1176 | /* procedure to detect PLL lock synchronisation: |
| 1177 | * after 0.5 msec initial delay we expect to find 3 PLL lock |
| 1178 | * indications within 10 msec for successful PLL detection. |
| 1179 | */ |
| 1180 | udelay(500); |
| 1181 | count = 0; |
| 1182 | for (i = 500; i <= 10000; i += 50) { /* max 10 msec */ |
| 1183 | pci_read_config_byte(pdev, VLSI_PCI_CLKCTL, &lock); |
| 1184 | if (lock&CLKCTL_LOCK) { |
| 1185 | if (++count >= 3) |
| 1186 | break; |
| 1187 | } |
| 1188 | udelay(50); |
| 1189 | } |
| 1190 | if (count < 3) { |
| 1191 | if (clksrc == 1) { /* explicitly asked for PLL hence bail out */ |
| 1192 | IRDA_ERROR("%s: no PLL or failed to lock!\n", |
| 1193 | __FUNCTION__); |
| 1194 | clkctl = CLKCTL_CLKSTP; |
| 1195 | pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl); |
| 1196 | return -1; |
| 1197 | } |
| 1198 | else /* was: clksrc=0(auto) */ |
| 1199 | clksrc = 3; /* fallback to 40MHz XCLK (OB800) */ |
| 1200 | |
| 1201 | IRDA_DEBUG(0, "%s: PLL not locked, fallback to clksrc=%d\n", |
| 1202 | __FUNCTION__, clksrc); |
| 1203 | } |
| 1204 | else |
| 1205 | clksrc = 1; /* got successful PLL lock */ |
| 1206 | } |
| 1207 | |
| 1208 | if (clksrc != 1) { |
| 1209 | /* we get here if either no PLL detected in auto-mode or |
| 1210 | an external clock source was explicitly specified */ |
| 1211 | |
| 1212 | clkctl = CLKCTL_EXTCLK | CLKCTL_CLKSTP; |
| 1213 | if (clksrc == 3) |
| 1214 | clkctl |= CLKCTL_XCKSEL; |
| 1215 | pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl); |
| 1216 | |
| 1217 | /* no way to test for working XCLK */ |
| 1218 | } |
| 1219 | else |
| 1220 | pci_read_config_byte(pdev, VLSI_PCI_CLKCTL, &clkctl); |
| 1221 | |
| 1222 | /* ok, now going to connect the chip with the clock source */ |
| 1223 | |
| 1224 | clkctl &= ~CLKCTL_CLKSTP; |
| 1225 | pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl); |
| 1226 | |
| 1227 | return 0; |
| 1228 | } |
| 1229 | |
| 1230 | static void vlsi_stop_clock(struct pci_dev *pdev) |
| 1231 | { |
| 1232 | u8 clkctl; |
| 1233 | |
| 1234 | /* disconnect chip from clock source */ |
| 1235 | pci_read_config_byte(pdev, VLSI_PCI_CLKCTL, &clkctl); |
| 1236 | clkctl |= CLKCTL_CLKSTP; |
| 1237 | pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl); |
| 1238 | |
| 1239 | /* disable all clock sources */ |
| 1240 | clkctl &= ~(CLKCTL_EXTCLK | CLKCTL_PD_INV); |
| 1241 | pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl); |
| 1242 | } |
| 1243 | |
| 1244 | /********************************************************/ |
| 1245 | |
| 1246 | /* writing all-zero to the VLSI PCI IO register area seems to prevent |
| 1247 | * some occasional situations where the hardware fails (symptoms are |
| 1248 | * what appears as stalled tx/rx state machines, i.e. everything ok for |
| 1249 | * receive or transmit but hw makes no progress or is unable to access |
| 1250 | * the bus memory locations). |
| 1251 | * Best place to call this is immediately after/before the internal clock |
| 1252 | * gets started/stopped. |
| 1253 | */ |
| 1254 | |
| 1255 | static inline void vlsi_clear_regs(unsigned iobase) |
| 1256 | { |
| 1257 | unsigned i; |
| 1258 | const unsigned chip_io_extent = 32; |
| 1259 | |
| 1260 | for (i = 0; i < chip_io_extent; i += sizeof(u16)) |
| 1261 | outw(0, iobase + i); |
| 1262 | } |
| 1263 | |
| 1264 | static int vlsi_init_chip(struct pci_dev *pdev) |
| 1265 | { |
| 1266 | struct net_device *ndev = pci_get_drvdata(pdev); |
| 1267 | vlsi_irda_dev_t *idev = ndev->priv; |
| 1268 | unsigned iobase; |
| 1269 | u16 ptr; |
| 1270 | |
| 1271 | /* start the clock and clean the registers */ |
| 1272 | |
| 1273 | if (vlsi_start_clock(pdev)) { |
| 1274 | IRDA_ERROR("%s: no valid clock source\n", __FUNCTION__); |
| 1275 | return -1; |
| 1276 | } |
| 1277 | iobase = ndev->base_addr; |
| 1278 | vlsi_clear_regs(iobase); |
| 1279 | |
| 1280 | outb(IRINTR_INT_MASK, iobase+VLSI_PIO_IRINTR); /* w/c pending IRQ, disable all INT */ |
| 1281 | |
| 1282 | outw(0, iobase+VLSI_PIO_IRENABLE); /* disable IrPHY-interface */ |
| 1283 | |
| 1284 | /* disable everything, particularly IRCFG_MSTR - (also resetting the RING_PTR) */ |
| 1285 | |
| 1286 | outw(0, iobase+VLSI_PIO_IRCFG); |
| 1287 | wmb(); |
| 1288 | |
| 1289 | outw(MAX_PACKET_LENGTH, iobase+VLSI_PIO_MAXPKT); /* max possible value=0x0fff */ |
| 1290 | |
| 1291 | outw(BUS_TO_RINGBASE(idev->busaddr), iobase+VLSI_PIO_RINGBASE); |
| 1292 | |
| 1293 | outw(TX_RX_TO_RINGSIZE(idev->tx_ring->size, idev->rx_ring->size), |
| 1294 | iobase+VLSI_PIO_RINGSIZE); |
| 1295 | |
| 1296 | ptr = inw(iobase+VLSI_PIO_RINGPTR); |
| 1297 | atomic_set(&idev->rx_ring->head, RINGPTR_GET_RX(ptr)); |
| 1298 | atomic_set(&idev->rx_ring->tail, RINGPTR_GET_RX(ptr)); |
| 1299 | atomic_set(&idev->tx_ring->head, RINGPTR_GET_TX(ptr)); |
| 1300 | atomic_set(&idev->tx_ring->tail, RINGPTR_GET_TX(ptr)); |
| 1301 | |
| 1302 | vlsi_set_baud(idev, iobase); /* idev->new_baud used as provided by caller */ |
| 1303 | |
| 1304 | outb(IRINTR_INT_MASK, iobase+VLSI_PIO_IRINTR); /* just in case - w/c pending IRQ's */ |
| 1305 | wmb(); |
| 1306 | |
| 1307 | /* DO NOT BLINDLY ENABLE IRINTR_ACTEN! |
| 1308 | * basically every received pulse fires an ACTIVITY-INT |
| 1309 | * leading to >>1000 INT's per second instead of few 10 |
| 1310 | */ |
| 1311 | |
| 1312 | outb(IRINTR_RPKTEN|IRINTR_TPKTEN, iobase+VLSI_PIO_IRINTR); |
| 1313 | |
| 1314 | return 0; |
| 1315 | } |
| 1316 | |
| 1317 | static int vlsi_start_hw(vlsi_irda_dev_t *idev) |
| 1318 | { |
| 1319 | struct pci_dev *pdev = idev->pdev; |
| 1320 | struct net_device *ndev = pci_get_drvdata(pdev); |
| 1321 | unsigned iobase = ndev->base_addr; |
| 1322 | u8 byte; |
| 1323 | |
| 1324 | /* we don't use the legacy UART, disable its address decoding */ |
| 1325 | |
| 1326 | pci_read_config_byte(pdev, VLSI_PCI_IRMISC, &byte); |
| 1327 | byte &= ~(IRMISC_UARTEN | IRMISC_UARTTST); |
| 1328 | pci_write_config_byte(pdev, VLSI_PCI_IRMISC, byte); |
| 1329 | |
| 1330 | /* enable PCI busmaster access to our 16MB page */ |
| 1331 | |
| 1332 | pci_write_config_byte(pdev, VLSI_PCI_MSTRPAGE, MSTRPAGE_VALUE); |
| 1333 | pci_set_master(pdev); |
| 1334 | |
| 1335 | if (vlsi_init_chip(pdev) < 0) { |
| 1336 | pci_disable_device(pdev); |
| 1337 | return -1; |
| 1338 | } |
| 1339 | |
| 1340 | vlsi_fill_rx(idev->rx_ring); |
| 1341 | |
| 1342 | do_gettimeofday(&idev->last_rx); /* first mtt may start from now on */ |
| 1343 | |
| 1344 | outw(0, iobase+VLSI_PIO_PROMPT); /* kick hw state machine */ |
| 1345 | |
| 1346 | return 0; |
| 1347 | } |
| 1348 | |
| 1349 | static int vlsi_stop_hw(vlsi_irda_dev_t *idev) |
| 1350 | { |
| 1351 | struct pci_dev *pdev = idev->pdev; |
| 1352 | struct net_device *ndev = pci_get_drvdata(pdev); |
| 1353 | unsigned iobase = ndev->base_addr; |
| 1354 | unsigned long flags; |
| 1355 | |
| 1356 | spin_lock_irqsave(&idev->lock,flags); |
| 1357 | outw(0, iobase+VLSI_PIO_IRENABLE); |
| 1358 | outw(0, iobase+VLSI_PIO_IRCFG); /* disable everything */ |
| 1359 | |
| 1360 | /* disable and w/c irqs */ |
| 1361 | outb(0, iobase+VLSI_PIO_IRINTR); |
| 1362 | wmb(); |
| 1363 | outb(IRINTR_INT_MASK, iobase+VLSI_PIO_IRINTR); |
| 1364 | spin_unlock_irqrestore(&idev->lock,flags); |
| 1365 | |
| 1366 | vlsi_unarm_tx(idev); |
| 1367 | vlsi_unarm_rx(idev); |
| 1368 | |
| 1369 | vlsi_clear_regs(iobase); |
| 1370 | vlsi_stop_clock(pdev); |
| 1371 | |
| 1372 | pci_disable_device(pdev); |
| 1373 | |
| 1374 | return 0; |
| 1375 | } |
| 1376 | |
| 1377 | /**************************************************************/ |
| 1378 | |
| 1379 | static struct net_device_stats * vlsi_get_stats(struct net_device *ndev) |
| 1380 | { |
| 1381 | vlsi_irda_dev_t *idev = ndev->priv; |
| 1382 | |
| 1383 | return &idev->stats; |
| 1384 | } |
| 1385 | |
| 1386 | static void vlsi_tx_timeout(struct net_device *ndev) |
| 1387 | { |
| 1388 | vlsi_irda_dev_t *idev = ndev->priv; |
| 1389 | |
| 1390 | |
| 1391 | vlsi_reg_debug(ndev->base_addr, __FUNCTION__); |
| 1392 | vlsi_ring_debug(idev->tx_ring); |
| 1393 | |
| 1394 | if (netif_running(ndev)) |
| 1395 | netif_stop_queue(ndev); |
| 1396 | |
| 1397 | vlsi_stop_hw(idev); |
| 1398 | |
| 1399 | /* now simply restart the whole thing */ |
| 1400 | |
| 1401 | if (!idev->new_baud) |
| 1402 | idev->new_baud = idev->baud; /* keep current baudrate */ |
| 1403 | |
| 1404 | if (vlsi_start_hw(idev)) |
| 1405 | IRDA_ERROR("%s: failed to restart hw - %s(%s) unusable!\n", |
| 1406 | __FUNCTION__, PCIDEV_NAME(idev->pdev), ndev->name); |
| 1407 | else |
| 1408 | netif_start_queue(ndev); |
| 1409 | } |
| 1410 | |
| 1411 | static int vlsi_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd) |
| 1412 | { |
| 1413 | vlsi_irda_dev_t *idev = ndev->priv; |
| 1414 | struct if_irda_req *irq = (struct if_irda_req *) rq; |
| 1415 | unsigned long flags; |
| 1416 | u16 fifocnt; |
| 1417 | int ret = 0; |
| 1418 | |
| 1419 | switch (cmd) { |
| 1420 | case SIOCSBANDWIDTH: |
| 1421 | if (!capable(CAP_NET_ADMIN)) { |
| 1422 | ret = -EPERM; |
| 1423 | break; |
| 1424 | } |
| 1425 | spin_lock_irqsave(&idev->lock, flags); |
| 1426 | idev->new_baud = irq->ifr_baudrate; |
| 1427 | /* when called from userland there might be a minor race window here |
| 1428 | * if the stack tries to change speed concurrently - which would be |
| 1429 | * pretty strange anyway with the userland having full control... |
| 1430 | */ |
| 1431 | vlsi_set_baud(idev, ndev->base_addr); |
| 1432 | spin_unlock_irqrestore(&idev->lock, flags); |
| 1433 | break; |
| 1434 | case SIOCSMEDIABUSY: |
| 1435 | if (!capable(CAP_NET_ADMIN)) { |
| 1436 | ret = -EPERM; |
| 1437 | break; |
| 1438 | } |
| 1439 | irda_device_set_media_busy(ndev, TRUE); |
| 1440 | break; |
| 1441 | case SIOCGRECEIVING: |
| 1442 | /* the best we can do: check whether there are any bytes in rx fifo. |
| 1443 | * The trustable window (in case some data arrives just afterwards) |
| 1444 | * may be as short as 1usec or so at 4Mbps. |
| 1445 | */ |
| 1446 | fifocnt = inw(ndev->base_addr+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK; |
| 1447 | irq->ifr_receiving = (fifocnt!=0) ? 1 : 0; |
| 1448 | break; |
| 1449 | default: |
| 1450 | IRDA_WARNING("%s: notsupp - cmd=%04x\n", |
| 1451 | __FUNCTION__, cmd); |
| 1452 | ret = -EOPNOTSUPP; |
| 1453 | } |
| 1454 | |
| 1455 | return ret; |
| 1456 | } |
| 1457 | |
| 1458 | /********************************************************/ |
| 1459 | |
| 1460 | static irqreturn_t vlsi_interrupt(int irq, void *dev_instance, |
| 1461 | struct pt_regs *regs) |
| 1462 | { |
| 1463 | struct net_device *ndev = dev_instance; |
| 1464 | vlsi_irda_dev_t *idev = ndev->priv; |
| 1465 | unsigned iobase; |
| 1466 | u8 irintr; |
| 1467 | int boguscount = 5; |
| 1468 | unsigned long flags; |
| 1469 | int handled = 0; |
| 1470 | |
| 1471 | iobase = ndev->base_addr; |
| 1472 | spin_lock_irqsave(&idev->lock,flags); |
| 1473 | do { |
| 1474 | irintr = inb(iobase+VLSI_PIO_IRINTR); |
| 1475 | mb(); |
| 1476 | outb(irintr, iobase+VLSI_PIO_IRINTR); /* acknowledge asap */ |
| 1477 | |
| 1478 | if (!(irintr&=IRINTR_INT_MASK)) /* not our INT - probably shared */ |
| 1479 | break; |
| 1480 | |
| 1481 | handled = 1; |
| 1482 | |
| 1483 | if (unlikely(!(irintr & ~IRINTR_ACTIVITY))) |
| 1484 | break; /* nothing todo if only activity */ |
| 1485 | |
| 1486 | if (irintr&IRINTR_RPKTINT) |
| 1487 | vlsi_rx_interrupt(ndev); |
| 1488 | |
| 1489 | if (irintr&IRINTR_TPKTINT) |
| 1490 | vlsi_tx_interrupt(ndev); |
| 1491 | |
| 1492 | } while (--boguscount > 0); |
| 1493 | spin_unlock_irqrestore(&idev->lock,flags); |
| 1494 | |
| 1495 | if (boguscount <= 0) |
| 1496 | IRDA_MESSAGE("%s: too much work in interrupt!\n", |
| 1497 | __FUNCTION__); |
| 1498 | return IRQ_RETVAL(handled); |
| 1499 | } |
| 1500 | |
| 1501 | /********************************************************/ |
| 1502 | |
| 1503 | static int vlsi_open(struct net_device *ndev) |
| 1504 | { |
| 1505 | vlsi_irda_dev_t *idev = ndev->priv; |
| 1506 | int err = -EAGAIN; |
| 1507 | char hwname[32]; |
| 1508 | |
| 1509 | if (pci_request_regions(idev->pdev, drivername)) { |
| 1510 | IRDA_WARNING("%s: io resource busy\n", __FUNCTION__); |
| 1511 | goto errout; |
| 1512 | } |
| 1513 | ndev->base_addr = pci_resource_start(idev->pdev,0); |
| 1514 | ndev->irq = idev->pdev->irq; |
| 1515 | |
| 1516 | /* under some rare occasions the chip apparently comes up with |
| 1517 | * IRQ's pending. We better w/c pending IRQ and disable them all |
| 1518 | */ |
| 1519 | |
| 1520 | outb(IRINTR_INT_MASK, ndev->base_addr+VLSI_PIO_IRINTR); |
| 1521 | |
| 1522 | if (request_irq(ndev->irq, vlsi_interrupt, SA_SHIRQ, |
| 1523 | drivername, ndev)) { |
| 1524 | IRDA_WARNING("%s: couldn't get IRQ: %d\n", |
| 1525 | __FUNCTION__, ndev->irq); |
| 1526 | goto errout_io; |
| 1527 | } |
| 1528 | |
| 1529 | if ((err = vlsi_create_hwif(idev)) != 0) |
| 1530 | goto errout_irq; |
| 1531 | |
| 1532 | sprintf(hwname, "VLSI-FIR @ 0x%04x", (unsigned)ndev->base_addr); |
| 1533 | idev->irlap = irlap_open(ndev,&idev->qos,hwname); |
| 1534 | if (!idev->irlap) |
| 1535 | goto errout_free_ring; |
| 1536 | |
| 1537 | do_gettimeofday(&idev->last_rx); /* first mtt may start from now on */ |
| 1538 | |
| 1539 | idev->new_baud = 9600; /* start with IrPHY using 9600(SIR) mode */ |
| 1540 | |
| 1541 | if ((err = vlsi_start_hw(idev)) != 0) |
| 1542 | goto errout_close_irlap; |
| 1543 | |
| 1544 | netif_start_queue(ndev); |
| 1545 | |
| 1546 | IRDA_MESSAGE("%s: device %s operational\n", __FUNCTION__, ndev->name); |
| 1547 | |
| 1548 | return 0; |
| 1549 | |
| 1550 | errout_close_irlap: |
| 1551 | irlap_close(idev->irlap); |
| 1552 | errout_free_ring: |
| 1553 | vlsi_destroy_hwif(idev); |
| 1554 | errout_irq: |
| 1555 | free_irq(ndev->irq,ndev); |
| 1556 | errout_io: |
| 1557 | pci_release_regions(idev->pdev); |
| 1558 | errout: |
| 1559 | return err; |
| 1560 | } |
| 1561 | |
| 1562 | static int vlsi_close(struct net_device *ndev) |
| 1563 | { |
| 1564 | vlsi_irda_dev_t *idev = ndev->priv; |
| 1565 | |
| 1566 | netif_stop_queue(ndev); |
| 1567 | |
| 1568 | if (idev->irlap) |
| 1569 | irlap_close(idev->irlap); |
| 1570 | idev->irlap = NULL; |
| 1571 | |
| 1572 | vlsi_stop_hw(idev); |
| 1573 | |
| 1574 | vlsi_destroy_hwif(idev); |
| 1575 | |
| 1576 | free_irq(ndev->irq,ndev); |
| 1577 | |
| 1578 | pci_release_regions(idev->pdev); |
| 1579 | |
| 1580 | IRDA_MESSAGE("%s: device %s stopped\n", __FUNCTION__, ndev->name); |
| 1581 | |
| 1582 | return 0; |
| 1583 | } |
| 1584 | |
| 1585 | static int vlsi_irda_init(struct net_device *ndev) |
| 1586 | { |
| 1587 | vlsi_irda_dev_t *idev = ndev->priv; |
| 1588 | struct pci_dev *pdev = idev->pdev; |
| 1589 | |
| 1590 | SET_MODULE_OWNER(ndev); |
| 1591 | |
| 1592 | ndev->irq = pdev->irq; |
| 1593 | ndev->base_addr = pci_resource_start(pdev,0); |
| 1594 | |
| 1595 | /* PCI busmastering |
| 1596 | * see include file for details why we need these 2 masks, in this order! |
| 1597 | */ |
| 1598 | |
| 1599 | if (pci_set_dma_mask(pdev,DMA_MASK_USED_BY_HW) |
| 1600 | || pci_set_dma_mask(pdev,DMA_MASK_MSTRPAGE)) { |
| 1601 | IRDA_ERROR("%s: aborting due to PCI BM-DMA address limitations\n", __FUNCTION__); |
| 1602 | return -1; |
| 1603 | } |
| 1604 | |
| 1605 | irda_init_max_qos_capabilies(&idev->qos); |
| 1606 | |
| 1607 | /* the VLSI82C147 does not support 576000! */ |
| 1608 | |
| 1609 | idev->qos.baud_rate.bits = IR_2400 | IR_9600 |
| 1610 | | IR_19200 | IR_38400 | IR_57600 | IR_115200 |
| 1611 | | IR_1152000 | (IR_4000000 << 8); |
| 1612 | |
| 1613 | idev->qos.min_turn_time.bits = qos_mtt_bits; |
| 1614 | |
| 1615 | irda_qos_bits_to_value(&idev->qos); |
| 1616 | |
| 1617 | /* currently no public media definitions for IrDA */ |
| 1618 | |
| 1619 | ndev->flags |= IFF_PORTSEL | IFF_AUTOMEDIA; |
| 1620 | ndev->if_port = IF_PORT_UNKNOWN; |
| 1621 | |
| 1622 | ndev->open = vlsi_open; |
| 1623 | ndev->stop = vlsi_close; |
| 1624 | ndev->get_stats = vlsi_get_stats; |
| 1625 | ndev->hard_start_xmit = vlsi_hard_start_xmit; |
| 1626 | ndev->do_ioctl = vlsi_ioctl; |
| 1627 | ndev->tx_timeout = vlsi_tx_timeout; |
| 1628 | ndev->watchdog_timeo = 500*HZ/1000; /* max. allowed turn time for IrLAP */ |
| 1629 | |
| 1630 | SET_NETDEV_DEV(ndev, &pdev->dev); |
| 1631 | |
| 1632 | return 0; |
| 1633 | } |
| 1634 | |
| 1635 | /**************************************************************/ |
| 1636 | |
| 1637 | static int __devinit |
| 1638 | vlsi_irda_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
| 1639 | { |
| 1640 | struct net_device *ndev; |
| 1641 | vlsi_irda_dev_t *idev; |
| 1642 | |
| 1643 | if (pci_enable_device(pdev)) |
| 1644 | goto out; |
| 1645 | else |
| 1646 | pdev->current_state = 0; /* hw must be running now */ |
| 1647 | |
| 1648 | IRDA_MESSAGE("%s: IrDA PCI controller %s detected\n", |
| 1649 | drivername, PCIDEV_NAME(pdev)); |
| 1650 | |
| 1651 | if ( !pci_resource_start(pdev,0) |
| 1652 | || !(pci_resource_flags(pdev,0) & IORESOURCE_IO) ) { |
| 1653 | IRDA_ERROR("%s: bar 0 invalid", __FUNCTION__); |
| 1654 | goto out_disable; |
| 1655 | } |
| 1656 | |
| 1657 | ndev = alloc_irdadev(sizeof(*idev)); |
| 1658 | if (ndev==NULL) { |
| 1659 | IRDA_ERROR("%s: Unable to allocate device memory.\n", |
| 1660 | __FUNCTION__); |
| 1661 | goto out_disable; |
| 1662 | } |
| 1663 | |
| 1664 | idev = ndev->priv; |
| 1665 | |
| 1666 | spin_lock_init(&idev->lock); |
| 1667 | init_MUTEX(&idev->sem); |
| 1668 | down(&idev->sem); |
| 1669 | idev->pdev = pdev; |
| 1670 | |
| 1671 | if (vlsi_irda_init(ndev) < 0) |
| 1672 | goto out_freedev; |
| 1673 | |
| 1674 | if (register_netdev(ndev) < 0) { |
| 1675 | IRDA_ERROR("%s: register_netdev failed\n", __FUNCTION__); |
| 1676 | goto out_freedev; |
| 1677 | } |
| 1678 | |
| 1679 | if (vlsi_proc_root != NULL) { |
| 1680 | struct proc_dir_entry *ent; |
| 1681 | |
| 1682 | ent = create_proc_entry(ndev->name, S_IFREG|S_IRUGO, vlsi_proc_root); |
| 1683 | if (!ent) { |
| 1684 | IRDA_WARNING("%s: failed to create proc entry\n", |
| 1685 | __FUNCTION__); |
| 1686 | } else { |
| 1687 | ent->data = ndev; |
| 1688 | ent->proc_fops = VLSI_PROC_FOPS; |
| 1689 | ent->size = 0; |
| 1690 | } |
| 1691 | idev->proc_entry = ent; |
| 1692 | } |
| 1693 | IRDA_MESSAGE("%s: registered device %s\n", drivername, ndev->name); |
| 1694 | |
| 1695 | pci_set_drvdata(pdev, ndev); |
| 1696 | up(&idev->sem); |
| 1697 | |
| 1698 | return 0; |
| 1699 | |
| 1700 | out_freedev: |
| 1701 | up(&idev->sem); |
| 1702 | free_netdev(ndev); |
| 1703 | out_disable: |
| 1704 | pci_disable_device(pdev); |
| 1705 | out: |
| 1706 | pci_set_drvdata(pdev, NULL); |
| 1707 | return -ENODEV; |
| 1708 | } |
| 1709 | |
| 1710 | static void __devexit vlsi_irda_remove(struct pci_dev *pdev) |
| 1711 | { |
| 1712 | struct net_device *ndev = pci_get_drvdata(pdev); |
| 1713 | vlsi_irda_dev_t *idev; |
| 1714 | |
| 1715 | if (!ndev) { |
| 1716 | IRDA_ERROR("%s: lost netdevice?\n", drivername); |
| 1717 | return; |
| 1718 | } |
| 1719 | |
| 1720 | unregister_netdev(ndev); |
| 1721 | |
| 1722 | idev = ndev->priv; |
| 1723 | down(&idev->sem); |
| 1724 | if (idev->proc_entry) { |
| 1725 | remove_proc_entry(ndev->name, vlsi_proc_root); |
| 1726 | idev->proc_entry = NULL; |
| 1727 | } |
| 1728 | up(&idev->sem); |
| 1729 | |
| 1730 | free_netdev(ndev); |
| 1731 | |
| 1732 | pci_set_drvdata(pdev, NULL); |
| 1733 | |
| 1734 | IRDA_MESSAGE("%s: %s removed\n", drivername, PCIDEV_NAME(pdev)); |
| 1735 | } |
| 1736 | |
| 1737 | #ifdef CONFIG_PM |
| 1738 | |
| 1739 | /* The Controller doesn't provide PCI PM capabilities as defined by PCI specs. |
| 1740 | * Some of the Linux PCI-PM code however depends on this, for example in |
| 1741 | * pci_set_power_state(). So we have to take care to perform the required |
| 1742 | * operations on our own (particularly reflecting the pdev->current_state) |
| 1743 | * otherwise we might get cheated by pci-pm. |
| 1744 | */ |
| 1745 | |
| 1746 | |
Pavel Machek | 05adc3b | 2005-04-16 15:25:25 -0700 | [diff] [blame] | 1747 | static int vlsi_irda_suspend(struct pci_dev *pdev, pm_message_t state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1748 | { |
| 1749 | struct net_device *ndev = pci_get_drvdata(pdev); |
| 1750 | vlsi_irda_dev_t *idev; |
| 1751 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1752 | if (!ndev) { |
| 1753 | IRDA_ERROR("%s - %s: no netdevice \n", |
| 1754 | __FUNCTION__, PCIDEV_NAME(pdev)); |
| 1755 | return 0; |
| 1756 | } |
| 1757 | idev = ndev->priv; |
| 1758 | down(&idev->sem); |
| 1759 | if (pdev->current_state != 0) { /* already suspended */ |
Pavel Machek | ca078ba | 2005-09-03 15:56:57 -0700 | [diff] [blame^] | 1760 | if (state.event > pdev->current_state) { /* simply go deeper */ |
| 1761 | pci_set_power_state(pdev, pci_choose_state(pdev, state)); |
| 1762 | pdev->current_state = state.event; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1763 | } |
| 1764 | else |
Pavel Machek | ca078ba | 2005-09-03 15:56:57 -0700 | [diff] [blame^] | 1765 | IRDA_ERROR("%s - %s: invalid suspend request %u -> %u\n", __FUNCTION__, PCIDEV_NAME(pdev), pdev->current_state, state.event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1766 | up(&idev->sem); |
| 1767 | return 0; |
| 1768 | } |
| 1769 | |
| 1770 | if (netif_running(ndev)) { |
| 1771 | netif_device_detach(ndev); |
| 1772 | vlsi_stop_hw(idev); |
| 1773 | pci_save_state(pdev); |
| 1774 | if (!idev->new_baud) |
| 1775 | /* remember speed settings to restore on resume */ |
| 1776 | idev->new_baud = idev->baud; |
| 1777 | } |
| 1778 | |
Pavel Machek | 829ca9a | 2005-09-03 15:56:56 -0700 | [diff] [blame] | 1779 | pci_set_power_state(pdev, pci_choose_state(pdev, state)); |
Pavel Machek | ca078ba | 2005-09-03 15:56:57 -0700 | [diff] [blame^] | 1780 | pdev->current_state = state.event; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1781 | idev->resume_ok = 1; |
| 1782 | up(&idev->sem); |
| 1783 | return 0; |
| 1784 | } |
| 1785 | |
| 1786 | static int vlsi_irda_resume(struct pci_dev *pdev) |
| 1787 | { |
| 1788 | struct net_device *ndev = pci_get_drvdata(pdev); |
| 1789 | vlsi_irda_dev_t *idev; |
| 1790 | |
| 1791 | if (!ndev) { |
| 1792 | IRDA_ERROR("%s - %s: no netdevice \n", |
| 1793 | __FUNCTION__, PCIDEV_NAME(pdev)); |
| 1794 | return 0; |
| 1795 | } |
| 1796 | idev = ndev->priv; |
| 1797 | down(&idev->sem); |
| 1798 | if (pdev->current_state == 0) { |
| 1799 | up(&idev->sem); |
| 1800 | IRDA_WARNING("%s - %s: already resumed\n", |
| 1801 | __FUNCTION__, PCIDEV_NAME(pdev)); |
| 1802 | return 0; |
| 1803 | } |
| 1804 | |
Pavel Machek | 829ca9a | 2005-09-03 15:56:56 -0700 | [diff] [blame] | 1805 | pci_set_power_state(pdev, PCI_D0); |
| 1806 | pdev->current_state = PM_EVENT_ON; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1807 | |
| 1808 | if (!idev->resume_ok) { |
| 1809 | /* should be obsolete now - but used to happen due to: |
| 1810 | * - pci layer initially setting pdev->current_state = 4 (unknown) |
| 1811 | * - pci layer did not walk the save_state-tree (might be APM problem) |
| 1812 | * so we could not refuse to suspend from undefined state |
| 1813 | * - vlsi_irda_suspend detected invalid state and refused to save |
| 1814 | * configuration for resume - but was too late to stop suspending |
| 1815 | * - vlsi_irda_resume got screwed when trying to resume from garbage |
| 1816 | * |
| 1817 | * now we explicitly set pdev->current_state = 0 after enabling the |
| 1818 | * device and independently resume_ok should catch any garbage config. |
| 1819 | */ |
| 1820 | IRDA_WARNING("%s - hm, nothing to resume?\n", __FUNCTION__); |
| 1821 | up(&idev->sem); |
| 1822 | return 0; |
| 1823 | } |
| 1824 | |
| 1825 | if (netif_running(ndev)) { |
| 1826 | pci_restore_state(pdev); |
| 1827 | vlsi_start_hw(idev); |
| 1828 | netif_device_attach(ndev); |
| 1829 | } |
| 1830 | idev->resume_ok = 0; |
| 1831 | up(&idev->sem); |
| 1832 | return 0; |
| 1833 | } |
| 1834 | |
| 1835 | #endif /* CONFIG_PM */ |
| 1836 | |
| 1837 | /*********************************************************/ |
| 1838 | |
| 1839 | static struct pci_driver vlsi_irda_driver = { |
| 1840 | .name = drivername, |
| 1841 | .id_table = vlsi_irda_table, |
| 1842 | .probe = vlsi_irda_probe, |
| 1843 | .remove = __devexit_p(vlsi_irda_remove), |
| 1844 | #ifdef CONFIG_PM |
| 1845 | .suspend = vlsi_irda_suspend, |
| 1846 | .resume = vlsi_irda_resume, |
| 1847 | #endif |
| 1848 | }; |
| 1849 | |
| 1850 | #define PROC_DIR ("driver/" DRIVER_NAME) |
| 1851 | |
| 1852 | static int __init vlsi_mod_init(void) |
| 1853 | { |
| 1854 | int i, ret; |
| 1855 | |
| 1856 | if (clksrc < 0 || clksrc > 3) { |
| 1857 | IRDA_ERROR("%s: invalid clksrc=%d\n", drivername, clksrc); |
| 1858 | return -1; |
| 1859 | } |
| 1860 | |
| 1861 | for (i = 0; i < 2; i++) { |
| 1862 | switch(ringsize[i]) { |
| 1863 | case 4: |
| 1864 | case 8: |
| 1865 | case 16: |
| 1866 | case 32: |
| 1867 | case 64: |
| 1868 | break; |
| 1869 | default: |
| 1870 | IRDA_WARNING("%s: invalid %s ringsize %d, using default=8", drivername, (i)?"rx":"tx", ringsize[i]); |
| 1871 | ringsize[i] = 8; |
| 1872 | break; |
| 1873 | } |
| 1874 | } |
| 1875 | |
| 1876 | sirpulse = !!sirpulse; |
| 1877 | |
| 1878 | /* create_proc_entry returns NULL if !CONFIG_PROC_FS. |
| 1879 | * Failure to create the procfs entry is handled like running |
| 1880 | * without procfs - it's not required for the driver to work. |
| 1881 | */ |
| 1882 | vlsi_proc_root = create_proc_entry(PROC_DIR, S_IFDIR, NULL); |
| 1883 | if (vlsi_proc_root) { |
| 1884 | /* protect registered procdir against module removal. |
| 1885 | * Because we are in the module init path there's no race |
| 1886 | * window after create_proc_entry (and no barrier needed). |
| 1887 | */ |
| 1888 | vlsi_proc_root->owner = THIS_MODULE; |
| 1889 | } |
| 1890 | |
| 1891 | ret = pci_module_init(&vlsi_irda_driver); |
| 1892 | |
| 1893 | if (ret && vlsi_proc_root) |
| 1894 | remove_proc_entry(PROC_DIR, NULL); |
| 1895 | return ret; |
| 1896 | |
| 1897 | } |
| 1898 | |
| 1899 | static void __exit vlsi_mod_exit(void) |
| 1900 | { |
| 1901 | pci_unregister_driver(&vlsi_irda_driver); |
| 1902 | if (vlsi_proc_root) |
| 1903 | remove_proc_entry(PROC_DIR, NULL); |
| 1904 | } |
| 1905 | |
| 1906 | module_init(vlsi_mod_init); |
| 1907 | module_exit(vlsi_mod_exit); |