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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <linux/module.h> |
| 25 | |
| 26 | #define DRIVER_NAME "vlsi_ir" |
| 27 | #define DRIVER_VERSION "v0.5" |
| 28 | #define DRIVER_DESCRIPTION "IrDA SIR/MIR/FIR driver for VLSI 82C147" |
| 29 | #define DRIVER_AUTHOR "Martin Diehl <info@mdiehl.de>" |
| 30 | |
| 31 | MODULE_DESCRIPTION(DRIVER_DESCRIPTION); |
| 32 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 33 | MODULE_LICENSE("GPL"); |
| 34 | |
| 35 | /********************************************************/ |
| 36 | |
| 37 | #include <linux/kernel.h> |
| 38 | #include <linux/init.h> |
| 39 | #include <linux/pci.h> |
| 40 | #include <linux/slab.h> |
| 41 | #include <linux/netdevice.h> |
| 42 | #include <linux/skbuff.h> |
| 43 | #include <linux/delay.h> |
| 44 | #include <linux/time.h> |
| 45 | #include <linux/proc_fs.h> |
| 46 | #include <linux/seq_file.h> |
Matthias Kaehlcke | aa42911 | 2007-07-09 13:18:12 -0700 | [diff] [blame] | 47 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | #include <asm/uaccess.h> |
| 49 | #include <asm/byteorder.h> |
| 50 | |
| 51 | #include <net/irda/irda.h> |
| 52 | #include <net/irda/irda_device.h> |
| 53 | #include <net/irda/wrapper.h> |
| 54 | #include <net/irda/crc.h> |
| 55 | |
| 56 | #include "vlsi_ir.h" |
| 57 | |
| 58 | /********************************************************/ |
| 59 | |
| 60 | static /* const */ char drivername[] = DRIVER_NAME; |
| 61 | |
| 62 | static struct pci_device_id vlsi_irda_table [] = { |
| 63 | { |
| 64 | .class = PCI_CLASS_WIRELESS_IRDA << 8, |
| 65 | .class_mask = PCI_CLASS_SUBCLASS_MASK << 8, |
| 66 | .vendor = PCI_VENDOR_ID_VLSI, |
| 67 | .device = PCI_DEVICE_ID_VLSI_82C147, |
| 68 | .subvendor = PCI_ANY_ID, |
| 69 | .subdevice = PCI_ANY_ID, |
| 70 | }, |
| 71 | { /* all zeroes */ } |
| 72 | }; |
| 73 | |
| 74 | MODULE_DEVICE_TABLE(pci, vlsi_irda_table); |
| 75 | |
| 76 | /********************************************************/ |
| 77 | |
| 78 | /* clksrc: which clock source to be used |
| 79 | * 0: auto - try PLL, fallback to 40MHz XCLK |
| 80 | * 1: on-chip 48MHz PLL |
| 81 | * 2: external 48MHz XCLK |
| 82 | * 3: external 40MHz XCLK (HP OB-800) |
| 83 | */ |
| 84 | |
| 85 | static int clksrc = 0; /* default is 0(auto) */ |
| 86 | module_param(clksrc, int, 0); |
| 87 | MODULE_PARM_DESC(clksrc, "clock input source selection"); |
| 88 | |
| 89 | /* ringsize: size of the tx and rx descriptor rings |
| 90 | * independent for tx and rx |
| 91 | * specify as ringsize=tx[,rx] |
| 92 | * allowed values: 4, 8, 16, 32, 64 |
| 93 | * Due to the IrDA 1.x max. allowed window size=7, |
| 94 | * there should be no gain when using rings larger than 8 |
| 95 | */ |
| 96 | |
| 97 | static int ringsize[] = {8,8}; /* default is tx=8 / rx=8 */ |
| 98 | module_param_array(ringsize, int, NULL, 0); |
| 99 | MODULE_PARM_DESC(ringsize, "TX, RX ring descriptor size"); |
| 100 | |
| 101 | /* sirpulse: tuning of the SIR pulse width within IrPHY 1.3 limits |
| 102 | * 0: very short, 1.5us (exception: 6us at 2.4 kbaud) |
| 103 | * 1: nominal 3/16 bittime width |
| 104 | * note: IrDA compliant peer devices should be happy regardless |
| 105 | * which one is used. Primary goal is to save some power |
| 106 | * on the sender's side - at 9.6kbaud for example the short |
| 107 | * pulse width saves more than 90% of the transmitted IR power. |
| 108 | */ |
| 109 | |
| 110 | static int sirpulse = 1; /* default is 3/16 bittime */ |
| 111 | module_param(sirpulse, int, 0); |
| 112 | MODULE_PARM_DESC(sirpulse, "SIR pulse width tuning"); |
| 113 | |
| 114 | /* qos_mtt_bits: encoded min-turn-time value we require the peer device |
| 115 | * to use before transmitting to us. "Type 1" (per-station) |
| 116 | * bitfield according to IrLAP definition (section 6.6.8) |
| 117 | * Don't know which transceiver is used by my OB800 - the |
| 118 | * pretty common HP HDLS-1100 requires 1 msec - so lets use this. |
| 119 | */ |
| 120 | |
| 121 | static int qos_mtt_bits = 0x07; /* default is 1 ms or more */ |
| 122 | module_param(qos_mtt_bits, int, 0); |
| 123 | MODULE_PARM_DESC(qos_mtt_bits, "IrLAP bitfield representing min-turn-time"); |
| 124 | |
| 125 | /********************************************************/ |
| 126 | |
| 127 | static void vlsi_reg_debug(unsigned iobase, const char *s) |
| 128 | { |
| 129 | int i; |
| 130 | |
| 131 | printk(KERN_DEBUG "%s: ", s); |
| 132 | for (i = 0; i < 0x20; i++) |
| 133 | printk("%02x", (unsigned)inb((iobase+i))); |
| 134 | printk("\n"); |
| 135 | } |
| 136 | |
| 137 | static void vlsi_ring_debug(struct vlsi_ring *r) |
| 138 | { |
| 139 | struct ring_descr *rd; |
| 140 | unsigned i; |
| 141 | |
| 142 | printk(KERN_DEBUG "%s - ring %p / size %u / mask 0x%04x / len %u / dir %d / hw %p\n", |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 143 | __func__, r, r->size, r->mask, r->len, r->dir, r->rd[0].hw); |
| 144 | printk(KERN_DEBUG "%s - head = %d / tail = %d\n", __func__, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | atomic_read(&r->head) & r->mask, atomic_read(&r->tail) & r->mask); |
| 146 | for (i = 0; i < r->size; i++) { |
| 147 | rd = &r->rd[i]; |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 148 | printk(KERN_DEBUG "%s - ring descr %u: ", __func__, i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | printk("skb=%p data=%p hw=%p\n", rd->skb, rd->buf, rd->hw); |
| 150 | printk(KERN_DEBUG "%s - hw: status=%02x count=%u addr=0x%08x\n", |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 151 | __func__, (unsigned) rd_get_status(rd), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | (unsigned) rd_get_count(rd), (unsigned) rd_get_addr(rd)); |
| 153 | } |
| 154 | } |
| 155 | |
| 156 | /********************************************************/ |
| 157 | |
| 158 | /* needed regardless of CONFIG_PROC_FS */ |
| 159 | static struct proc_dir_entry *vlsi_proc_root = NULL; |
| 160 | |
| 161 | #ifdef CONFIG_PROC_FS |
| 162 | |
| 163 | static void vlsi_proc_pdev(struct seq_file *seq, struct pci_dev *pdev) |
| 164 | { |
| 165 | unsigned iobase = pci_resource_start(pdev, 0); |
| 166 | unsigned i; |
| 167 | |
Bjorn Helgaas | 978e9ae | 2008-09-22 19:20:06 -0700 | [diff] [blame] | 168 | seq_printf(seq, "\n%s (vid/did: [%04x:%04x])\n", |
Adrian Bunk | 778a43f | 2007-01-23 21:16:40 -0800 | [diff] [blame] | 169 | pci_name(pdev), (int)pdev->vendor, (int)pdev->device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | seq_printf(seq, "pci-power-state: %u\n", (unsigned) pdev->current_state); |
| 171 | seq_printf(seq, "resources: irq=%u / io=0x%04x / dma_mask=0x%016Lx\n", |
| 172 | pdev->irq, (unsigned)pci_resource_start(pdev, 0), (unsigned long long)pdev->dma_mask); |
| 173 | seq_printf(seq, "hw registers: "); |
| 174 | for (i = 0; i < 0x20; i++) |
| 175 | seq_printf(seq, "%02x", (unsigned)inb((iobase+i))); |
| 176 | seq_printf(seq, "\n"); |
| 177 | } |
| 178 | |
| 179 | static void vlsi_proc_ndev(struct seq_file *seq, struct net_device *ndev) |
| 180 | { |
Wang Chen | 4cf1653 | 2008-11-12 23:38:14 -0800 | [diff] [blame] | 181 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | u8 byte; |
| 183 | u16 word; |
| 184 | unsigned delta1, delta2; |
| 185 | struct timeval now; |
| 186 | unsigned iobase = ndev->base_addr; |
| 187 | |
| 188 | seq_printf(seq, "\n%s link state: %s / %s / %s / %s\n", ndev->name, |
| 189 | netif_device_present(ndev) ? "attached" : "detached", |
| 190 | netif_running(ndev) ? "running" : "not running", |
| 191 | netif_carrier_ok(ndev) ? "carrier ok" : "no carrier", |
| 192 | netif_queue_stopped(ndev) ? "queue stopped" : "queue running"); |
| 193 | |
| 194 | if (!netif_running(ndev)) |
| 195 | return; |
| 196 | |
| 197 | seq_printf(seq, "\nhw-state:\n"); |
| 198 | pci_read_config_byte(idev->pdev, VLSI_PCI_IRMISC, &byte); |
| 199 | seq_printf(seq, "IRMISC:%s%s%s uart%s", |
| 200 | (byte&IRMISC_IRRAIL) ? " irrail" : "", |
| 201 | (byte&IRMISC_IRPD) ? " irpd" : "", |
| 202 | (byte&IRMISC_UARTTST) ? " uarttest" : "", |
| 203 | (byte&IRMISC_UARTEN) ? "@" : " disabled\n"); |
| 204 | if (byte&IRMISC_UARTEN) { |
| 205 | seq_printf(seq, "0x%s\n", |
| 206 | (byte&2) ? ((byte&1) ? "3e8" : "2e8") |
| 207 | : ((byte&1) ? "3f8" : "2f8")); |
| 208 | } |
| 209 | pci_read_config_byte(idev->pdev, VLSI_PCI_CLKCTL, &byte); |
| 210 | seq_printf(seq, "CLKCTL: PLL %s%s%s / clock %s / wakeup %s\n", |
| 211 | (byte&CLKCTL_PD_INV) ? "powered" : "down", |
| 212 | (byte&CLKCTL_LOCK) ? " locked" : "", |
| 213 | (byte&CLKCTL_EXTCLK) ? ((byte&CLKCTL_XCKSEL)?" / 40 MHz XCLK":" / 48 MHz XCLK") : "", |
| 214 | (byte&CLKCTL_CLKSTP) ? "stopped" : "running", |
| 215 | (byte&CLKCTL_WAKE) ? "enabled" : "disabled"); |
| 216 | pci_read_config_byte(idev->pdev, VLSI_PCI_MSTRPAGE, &byte); |
| 217 | seq_printf(seq, "MSTRPAGE: 0x%02x\n", (unsigned)byte); |
| 218 | |
| 219 | byte = inb(iobase+VLSI_PIO_IRINTR); |
| 220 | seq_printf(seq, "IRINTR:%s%s%s%s%s%s%s%s\n", |
| 221 | (byte&IRINTR_ACTEN) ? " ACTEN" : "", |
| 222 | (byte&IRINTR_RPKTEN) ? " RPKTEN" : "", |
| 223 | (byte&IRINTR_TPKTEN) ? " TPKTEN" : "", |
| 224 | (byte&IRINTR_OE_EN) ? " OE_EN" : "", |
| 225 | (byte&IRINTR_ACTIVITY) ? " ACTIVITY" : "", |
| 226 | (byte&IRINTR_RPKTINT) ? " RPKTINT" : "", |
| 227 | (byte&IRINTR_TPKTINT) ? " TPKTINT" : "", |
| 228 | (byte&IRINTR_OE_INT) ? " OE_INT" : ""); |
| 229 | word = inw(iobase+VLSI_PIO_RINGPTR); |
| 230 | seq_printf(seq, "RINGPTR: rx=%u / tx=%u\n", RINGPTR_GET_RX(word), RINGPTR_GET_TX(word)); |
| 231 | word = inw(iobase+VLSI_PIO_RINGBASE); |
| 232 | seq_printf(seq, "RINGBASE: busmap=0x%08x\n", |
| 233 | ((unsigned)word << 10)|(MSTRPAGE_VALUE<<24)); |
| 234 | word = inw(iobase+VLSI_PIO_RINGSIZE); |
| 235 | seq_printf(seq, "RINGSIZE: rx=%u / tx=%u\n", RINGSIZE_TO_RXSIZE(word), |
| 236 | RINGSIZE_TO_TXSIZE(word)); |
| 237 | |
| 238 | word = inw(iobase+VLSI_PIO_IRCFG); |
| 239 | seq_printf(seq, "IRCFG:%s%s%s%s%s%s%s%s%s%s%s%s%s\n", |
| 240 | (word&IRCFG_LOOP) ? " LOOP" : "", |
| 241 | (word&IRCFG_ENTX) ? " ENTX" : "", |
| 242 | (word&IRCFG_ENRX) ? " ENRX" : "", |
| 243 | (word&IRCFG_MSTR) ? " MSTR" : "", |
| 244 | (word&IRCFG_RXANY) ? " RXANY" : "", |
| 245 | (word&IRCFG_CRC16) ? " CRC16" : "", |
| 246 | (word&IRCFG_FIR) ? " FIR" : "", |
| 247 | (word&IRCFG_MIR) ? " MIR" : "", |
| 248 | (word&IRCFG_SIR) ? " SIR" : "", |
| 249 | (word&IRCFG_SIRFILT) ? " SIRFILT" : "", |
| 250 | (word&IRCFG_SIRTEST) ? " SIRTEST" : "", |
| 251 | (word&IRCFG_TXPOL) ? " TXPOL" : "", |
| 252 | (word&IRCFG_RXPOL) ? " RXPOL" : ""); |
| 253 | word = inw(iobase+VLSI_PIO_IRENABLE); |
| 254 | seq_printf(seq, "IRENABLE:%s%s%s%s%s%s%s%s\n", |
| 255 | (word&IRENABLE_PHYANDCLOCK) ? " PHYANDCLOCK" : "", |
| 256 | (word&IRENABLE_CFGER) ? " CFGERR" : "", |
| 257 | (word&IRENABLE_FIR_ON) ? " FIR_ON" : "", |
| 258 | (word&IRENABLE_MIR_ON) ? " MIR_ON" : "", |
| 259 | (word&IRENABLE_SIR_ON) ? " SIR_ON" : "", |
| 260 | (word&IRENABLE_ENTXST) ? " ENTXST" : "", |
| 261 | (word&IRENABLE_ENRXST) ? " ENRXST" : "", |
| 262 | (word&IRENABLE_CRC16_ON) ? " CRC16_ON" : ""); |
| 263 | word = inw(iobase+VLSI_PIO_PHYCTL); |
| 264 | seq_printf(seq, "PHYCTL: baud-divisor=%u / pulsewidth=%u / preamble=%u\n", |
| 265 | (unsigned)PHYCTL_TO_BAUD(word), |
| 266 | (unsigned)PHYCTL_TO_PLSWID(word), |
| 267 | (unsigned)PHYCTL_TO_PREAMB(word)); |
| 268 | word = inw(iobase+VLSI_PIO_NPHYCTL); |
| 269 | seq_printf(seq, "NPHYCTL: baud-divisor=%u / pulsewidth=%u / preamble=%u\n", |
| 270 | (unsigned)PHYCTL_TO_BAUD(word), |
| 271 | (unsigned)PHYCTL_TO_PLSWID(word), |
| 272 | (unsigned)PHYCTL_TO_PREAMB(word)); |
| 273 | word = inw(iobase+VLSI_PIO_MAXPKT); |
| 274 | seq_printf(seq, "MAXPKT: max. rx packet size = %u\n", word); |
| 275 | word = inw(iobase+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK; |
| 276 | seq_printf(seq, "RCVBCNT: rx-fifo filling level = %u\n", word); |
| 277 | |
| 278 | seq_printf(seq, "\nsw-state:\n"); |
| 279 | seq_printf(seq, "IrPHY setup: %d baud - %s encoding\n", idev->baud, |
| 280 | (idev->mode==IFF_SIR)?"SIR":((idev->mode==IFF_MIR)?"MIR":"FIR")); |
| 281 | do_gettimeofday(&now); |
| 282 | if (now.tv_usec >= idev->last_rx.tv_usec) { |
| 283 | delta2 = now.tv_usec - idev->last_rx.tv_usec; |
| 284 | delta1 = 0; |
| 285 | } |
| 286 | else { |
| 287 | delta2 = 1000000 + now.tv_usec - idev->last_rx.tv_usec; |
| 288 | delta1 = 1; |
| 289 | } |
| 290 | seq_printf(seq, "last rx: %lu.%06u sec\n", |
| 291 | now.tv_sec - idev->last_rx.tv_sec - delta1, delta2); |
| 292 | |
| 293 | seq_printf(seq, "RX: packets=%lu / bytes=%lu / errors=%lu / dropped=%lu", |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 294 | ndev->stats.rx_packets, ndev->stats.rx_bytes, ndev->stats.rx_errors, |
| 295 | ndev->stats.rx_dropped); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | seq_printf(seq, " / overrun=%lu / length=%lu / frame=%lu / crc=%lu\n", |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 297 | ndev->stats.rx_over_errors, ndev->stats.rx_length_errors, |
| 298 | ndev->stats.rx_frame_errors, ndev->stats.rx_crc_errors); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | seq_printf(seq, "TX: packets=%lu / bytes=%lu / errors=%lu / dropped=%lu / fifo=%lu\n", |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 300 | ndev->stats.tx_packets, ndev->stats.tx_bytes, ndev->stats.tx_errors, |
| 301 | ndev->stats.tx_dropped, ndev->stats.tx_fifo_errors); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | |
| 303 | } |
| 304 | |
| 305 | static void vlsi_proc_ring(struct seq_file *seq, struct vlsi_ring *r) |
| 306 | { |
| 307 | struct ring_descr *rd; |
| 308 | unsigned i, j; |
| 309 | int h, t; |
| 310 | |
| 311 | seq_printf(seq, "size %u / mask 0x%04x / len %u / dir %d / hw %p\n", |
| 312 | r->size, r->mask, r->len, r->dir, r->rd[0].hw); |
| 313 | h = atomic_read(&r->head) & r->mask; |
| 314 | t = atomic_read(&r->tail) & r->mask; |
| 315 | seq_printf(seq, "head = %d / tail = %d ", h, t); |
| 316 | if (h == t) |
| 317 | seq_printf(seq, "(empty)\n"); |
| 318 | else { |
| 319 | if (((t+1)&r->mask) == h) |
| 320 | seq_printf(seq, "(full)\n"); |
| 321 | else |
| 322 | seq_printf(seq, "(level = %d)\n", ((unsigned)(t-h) & r->mask)); |
| 323 | rd = &r->rd[h]; |
| 324 | j = (unsigned) rd_get_count(rd); |
| 325 | seq_printf(seq, "current: rd = %d / status = %02x / len = %u\n", |
| 326 | h, (unsigned)rd_get_status(rd), j); |
| 327 | if (j > 0) { |
| 328 | seq_printf(seq, " data:"); |
| 329 | if (j > 20) |
| 330 | j = 20; |
| 331 | for (i = 0; i < j; i++) |
| 332 | seq_printf(seq, " %02x", (unsigned)((unsigned char *)rd->buf)[i]); |
| 333 | seq_printf(seq, "\n"); |
| 334 | } |
| 335 | } |
| 336 | for (i = 0; i < r->size; i++) { |
| 337 | rd = &r->rd[i]; |
| 338 | seq_printf(seq, "> ring descr %u: ", i); |
| 339 | seq_printf(seq, "skb=%p data=%p hw=%p\n", rd->skb, rd->buf, rd->hw); |
| 340 | seq_printf(seq, " hw: status=%02x count=%u busaddr=0x%08x\n", |
| 341 | (unsigned) rd_get_status(rd), |
| 342 | (unsigned) rd_get_count(rd), (unsigned) rd_get_addr(rd)); |
| 343 | } |
| 344 | } |
| 345 | |
| 346 | static int vlsi_seq_show(struct seq_file *seq, void *v) |
| 347 | { |
| 348 | struct net_device *ndev = seq->private; |
Wang Chen | 4cf1653 | 2008-11-12 23:38:14 -0800 | [diff] [blame] | 349 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | unsigned long flags; |
| 351 | |
| 352 | seq_printf(seq, "\n%s %s\n\n", DRIVER_NAME, DRIVER_VERSION); |
| 353 | seq_printf(seq, "clksrc: %s\n", |
| 354 | (clksrc>=2) ? ((clksrc==3)?"40MHz XCLK":"48MHz XCLK") |
| 355 | : ((clksrc==1)?"48MHz PLL":"autodetect")); |
| 356 | seq_printf(seq, "ringsize: tx=%d / rx=%d\n", |
| 357 | ringsize[0], ringsize[1]); |
| 358 | seq_printf(seq, "sirpulse: %s\n", (sirpulse)?"3/16 bittime":"short"); |
| 359 | seq_printf(seq, "qos_mtt_bits: 0x%02x\n", (unsigned)qos_mtt_bits); |
| 360 | |
| 361 | spin_lock_irqsave(&idev->lock, flags); |
| 362 | if (idev->pdev != NULL) { |
| 363 | vlsi_proc_pdev(seq, idev->pdev); |
| 364 | |
| 365 | if (idev->pdev->current_state == 0) |
| 366 | vlsi_proc_ndev(seq, ndev); |
| 367 | else |
| 368 | seq_printf(seq, "\nPCI controller down - resume_ok = %d\n", |
| 369 | idev->resume_ok); |
| 370 | if (netif_running(ndev) && idev->rx_ring && idev->tx_ring) { |
| 371 | seq_printf(seq, "\n--------- RX ring -----------\n\n"); |
| 372 | vlsi_proc_ring(seq, idev->rx_ring); |
| 373 | seq_printf(seq, "\n--------- TX ring -----------\n\n"); |
| 374 | vlsi_proc_ring(seq, idev->tx_ring); |
| 375 | } |
| 376 | } |
| 377 | seq_printf(seq, "\n"); |
| 378 | spin_unlock_irqrestore(&idev->lock, flags); |
| 379 | |
| 380 | return 0; |
| 381 | } |
| 382 | |
| 383 | static int vlsi_seq_open(struct inode *inode, struct file *file) |
| 384 | { |
| 385 | return single_open(file, vlsi_seq_show, PDE(inode)->data); |
| 386 | } |
| 387 | |
Arjan van de Ven | d54b1fd | 2007-02-12 00:55:34 -0800 | [diff] [blame] | 388 | static const struct file_operations vlsi_proc_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | .owner = THIS_MODULE, |
| 390 | .open = vlsi_seq_open, |
| 391 | .read = seq_read, |
| 392 | .llseek = seq_lseek, |
| 393 | .release = single_release, |
| 394 | }; |
| 395 | |
| 396 | #define VLSI_PROC_FOPS (&vlsi_proc_fops) |
| 397 | |
| 398 | #else /* CONFIG_PROC_FS */ |
| 399 | #define VLSI_PROC_FOPS NULL |
| 400 | #endif |
| 401 | |
| 402 | /********************************************************/ |
| 403 | |
| 404 | static struct vlsi_ring *vlsi_alloc_ring(struct pci_dev *pdev, struct ring_descr_hw *hwmap, |
| 405 | unsigned size, unsigned len, int dir) |
| 406 | { |
| 407 | struct vlsi_ring *r; |
| 408 | struct ring_descr *rd; |
| 409 | unsigned i, j; |
| 410 | dma_addr_t busaddr; |
| 411 | |
| 412 | if (!size || ((size-1)&size)!=0) /* must be >0 and power of 2 */ |
| 413 | return NULL; |
| 414 | |
| 415 | r = kmalloc(sizeof(*r) + size * sizeof(struct ring_descr), GFP_KERNEL); |
| 416 | if (!r) |
| 417 | return NULL; |
| 418 | memset(r, 0, sizeof(*r)); |
| 419 | |
| 420 | r->pdev = pdev; |
| 421 | r->dir = dir; |
| 422 | r->len = len; |
| 423 | r->rd = (struct ring_descr *)(r+1); |
| 424 | r->mask = size - 1; |
| 425 | r->size = size; |
| 426 | atomic_set(&r->head, 0); |
| 427 | atomic_set(&r->tail, 0); |
| 428 | |
| 429 | for (i = 0; i < size; i++) { |
| 430 | rd = r->rd + i; |
| 431 | memset(rd, 0, sizeof(*rd)); |
| 432 | rd->hw = hwmap + i; |
| 433 | rd->buf = kmalloc(len, GFP_KERNEL|GFP_DMA); |
| 434 | if (rd->buf == NULL |
| 435 | || !(busaddr = pci_map_single(pdev, rd->buf, len, dir))) { |
| 436 | if (rd->buf) { |
| 437 | IRDA_ERROR("%s: failed to create PCI-MAP for %p", |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 438 | __func__, rd->buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | kfree(rd->buf); |
| 440 | rd->buf = NULL; |
| 441 | } |
| 442 | for (j = 0; j < i; j++) { |
| 443 | rd = r->rd + j; |
| 444 | busaddr = rd_get_addr(rd); |
| 445 | rd_set_addr_status(rd, 0, 0); |
| 446 | if (busaddr) |
| 447 | pci_unmap_single(pdev, busaddr, len, dir); |
| 448 | kfree(rd->buf); |
| 449 | rd->buf = NULL; |
| 450 | } |
| 451 | kfree(r); |
| 452 | return NULL; |
| 453 | } |
| 454 | rd_set_addr_status(rd, busaddr, 0); |
| 455 | /* initially, the dma buffer is owned by the CPU */ |
| 456 | rd->skb = NULL; |
| 457 | } |
| 458 | return r; |
| 459 | } |
| 460 | |
| 461 | static int vlsi_free_ring(struct vlsi_ring *r) |
| 462 | { |
| 463 | struct ring_descr *rd; |
| 464 | unsigned i; |
| 465 | dma_addr_t busaddr; |
| 466 | |
| 467 | for (i = 0; i < r->size; i++) { |
| 468 | rd = r->rd + i; |
| 469 | if (rd->skb) |
| 470 | dev_kfree_skb_any(rd->skb); |
| 471 | busaddr = rd_get_addr(rd); |
| 472 | rd_set_addr_status(rd, 0, 0); |
| 473 | if (busaddr) |
| 474 | pci_unmap_single(r->pdev, busaddr, r->len, r->dir); |
Jesper Juhl | b4558ea | 2005-10-28 16:53:13 -0400 | [diff] [blame] | 475 | kfree(rd->buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | } |
| 477 | kfree(r); |
| 478 | return 0; |
| 479 | } |
| 480 | |
| 481 | static int vlsi_create_hwif(vlsi_irda_dev_t *idev) |
| 482 | { |
| 483 | char *ringarea; |
| 484 | struct ring_descr_hw *hwmap; |
| 485 | |
| 486 | idev->virtaddr = NULL; |
| 487 | idev->busaddr = 0; |
| 488 | |
| 489 | ringarea = pci_alloc_consistent(idev->pdev, HW_RING_AREA_SIZE, &idev->busaddr); |
| 490 | if (!ringarea) { |
| 491 | IRDA_ERROR("%s: insufficient memory for descriptor rings\n", |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 492 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | goto out; |
| 494 | } |
| 495 | memset(ringarea, 0, HW_RING_AREA_SIZE); |
| 496 | |
| 497 | hwmap = (struct ring_descr_hw *)ringarea; |
| 498 | idev->rx_ring = vlsi_alloc_ring(idev->pdev, hwmap, ringsize[1], |
| 499 | XFER_BUF_SIZE, PCI_DMA_FROMDEVICE); |
| 500 | if (idev->rx_ring == NULL) |
| 501 | goto out_unmap; |
| 502 | |
| 503 | hwmap += MAX_RING_DESCR; |
| 504 | idev->tx_ring = vlsi_alloc_ring(idev->pdev, hwmap, ringsize[0], |
| 505 | XFER_BUF_SIZE, PCI_DMA_TODEVICE); |
| 506 | if (idev->tx_ring == NULL) |
| 507 | goto out_free_rx; |
| 508 | |
| 509 | idev->virtaddr = ringarea; |
| 510 | return 0; |
| 511 | |
| 512 | out_free_rx: |
| 513 | vlsi_free_ring(idev->rx_ring); |
| 514 | out_unmap: |
| 515 | idev->rx_ring = idev->tx_ring = NULL; |
| 516 | pci_free_consistent(idev->pdev, HW_RING_AREA_SIZE, ringarea, idev->busaddr); |
| 517 | idev->busaddr = 0; |
| 518 | out: |
| 519 | return -ENOMEM; |
| 520 | } |
| 521 | |
| 522 | static int vlsi_destroy_hwif(vlsi_irda_dev_t *idev) |
| 523 | { |
| 524 | vlsi_free_ring(idev->rx_ring); |
| 525 | vlsi_free_ring(idev->tx_ring); |
| 526 | idev->rx_ring = idev->tx_ring = NULL; |
| 527 | |
| 528 | if (idev->busaddr) |
| 529 | pci_free_consistent(idev->pdev,HW_RING_AREA_SIZE,idev->virtaddr,idev->busaddr); |
| 530 | |
| 531 | idev->virtaddr = NULL; |
| 532 | idev->busaddr = 0; |
| 533 | |
| 534 | return 0; |
| 535 | } |
| 536 | |
| 537 | /********************************************************/ |
| 538 | |
| 539 | static int vlsi_process_rx(struct vlsi_ring *r, struct ring_descr *rd) |
| 540 | { |
| 541 | u16 status; |
| 542 | int crclen, len = 0; |
| 543 | struct sk_buff *skb; |
| 544 | int ret = 0; |
| 545 | struct net_device *ndev = (struct net_device *)pci_get_drvdata(r->pdev); |
Wang Chen | 4cf1653 | 2008-11-12 23:38:14 -0800 | [diff] [blame] | 546 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | |
| 548 | pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir); |
| 549 | /* dma buffer now owned by the CPU */ |
| 550 | status = rd_get_status(rd); |
| 551 | if (status & RD_RX_ERROR) { |
| 552 | if (status & RD_RX_OVER) |
| 553 | ret |= VLSI_RX_OVER; |
| 554 | if (status & RD_RX_LENGTH) |
| 555 | ret |= VLSI_RX_LENGTH; |
| 556 | if (status & RD_RX_PHYERR) |
| 557 | ret |= VLSI_RX_FRAME; |
| 558 | if (status & RD_RX_CRCERR) |
| 559 | ret |= VLSI_RX_CRC; |
| 560 | goto done; |
| 561 | } |
| 562 | |
| 563 | len = rd_get_count(rd); |
| 564 | crclen = (idev->mode==IFF_FIR) ? sizeof(u32) : sizeof(u16); |
| 565 | len -= crclen; /* remove trailing CRC */ |
| 566 | if (len <= 0) { |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 567 | IRDA_DEBUG(0, "%s: strange frame (len=%d)\n", __func__, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | ret |= VLSI_RX_DROP; |
| 569 | goto done; |
| 570 | } |
| 571 | |
| 572 | if (idev->mode == IFF_SIR) { /* hw checks CRC in MIR, FIR mode */ |
| 573 | |
| 574 | /* rd->buf is a streaming PCI_DMA_FROMDEVICE map. Doing the |
| 575 | * endian-adjustment there just in place will dirty a cache line |
| 576 | * which belongs to the map and thus we must be sure it will |
| 577 | * get flushed before giving the buffer back to hardware. |
| 578 | * vlsi_fill_rx() will do this anyway - but here we rely on. |
| 579 | */ |
| 580 | le16_to_cpus(rd->buf+len); |
| 581 | if (irda_calc_crc16(INIT_FCS,rd->buf,len+crclen) != GOOD_FCS) { |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 582 | IRDA_DEBUG(0, "%s: crc error\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | ret |= VLSI_RX_CRC; |
| 584 | goto done; |
| 585 | } |
| 586 | } |
| 587 | |
| 588 | if (!rd->skb) { |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 589 | IRDA_WARNING("%s: rx packet lost\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 590 | ret |= VLSI_RX_DROP; |
| 591 | goto done; |
| 592 | } |
| 593 | |
| 594 | skb = rd->skb; |
| 595 | rd->skb = NULL; |
| 596 | skb->dev = ndev; |
| 597 | memcpy(skb_put(skb,len), rd->buf, len); |
Arnaldo Carvalho de Melo | 459a98e | 2007-03-19 15:30:44 -0700 | [diff] [blame] | 598 | skb_reset_mac_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | if (in_interrupt()) |
| 600 | netif_rx(skb); |
| 601 | else |
| 602 | netif_rx_ni(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | |
| 604 | done: |
| 605 | rd_set_status(rd, 0); |
| 606 | rd_set_count(rd, 0); |
| 607 | /* buffer still owned by CPU */ |
| 608 | |
| 609 | return (ret) ? -ret : len; |
| 610 | } |
| 611 | |
| 612 | static void vlsi_fill_rx(struct vlsi_ring *r) |
| 613 | { |
| 614 | struct ring_descr *rd; |
| 615 | |
| 616 | for (rd = ring_last(r); rd != NULL; rd = ring_put(r)) { |
| 617 | if (rd_is_active(rd)) { |
| 618 | IRDA_WARNING("%s: driver bug: rx descr race with hw\n", |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 619 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | vlsi_ring_debug(r); |
| 621 | break; |
| 622 | } |
| 623 | if (!rd->skb) { |
| 624 | rd->skb = dev_alloc_skb(IRLAP_SKB_ALLOCSIZE); |
| 625 | if (rd->skb) { |
| 626 | skb_reserve(rd->skb,1); |
| 627 | rd->skb->protocol = htons(ETH_P_IRDA); |
| 628 | } |
| 629 | else |
| 630 | break; /* probably not worth logging? */ |
| 631 | } |
| 632 | /* give dma buffer back to busmaster */ |
| 633 | pci_dma_sync_single_for_device(r->pdev, rd_get_addr(rd), r->len, r->dir); |
| 634 | rd_activate(rd); |
| 635 | } |
| 636 | } |
| 637 | |
| 638 | static void vlsi_rx_interrupt(struct net_device *ndev) |
| 639 | { |
Wang Chen | 4cf1653 | 2008-11-12 23:38:14 -0800 | [diff] [blame] | 640 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | struct vlsi_ring *r = idev->rx_ring; |
| 642 | struct ring_descr *rd; |
| 643 | int ret; |
| 644 | |
| 645 | for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) { |
| 646 | |
| 647 | if (rd_is_active(rd)) |
| 648 | break; |
| 649 | |
| 650 | ret = vlsi_process_rx(r, rd); |
| 651 | |
| 652 | if (ret < 0) { |
| 653 | ret = -ret; |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 654 | ndev->stats.rx_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | if (ret & VLSI_RX_DROP) |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 656 | ndev->stats.rx_dropped++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | if (ret & VLSI_RX_OVER) |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 658 | ndev->stats.rx_over_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | if (ret & VLSI_RX_LENGTH) |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 660 | ndev->stats.rx_length_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | if (ret & VLSI_RX_FRAME) |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 662 | ndev->stats.rx_frame_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | if (ret & VLSI_RX_CRC) |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 664 | ndev->stats.rx_crc_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | } |
| 666 | else if (ret > 0) { |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 667 | ndev->stats.rx_packets++; |
| 668 | ndev->stats.rx_bytes += ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | } |
| 670 | } |
| 671 | |
| 672 | do_gettimeofday(&idev->last_rx); /* remember "now" for later mtt delay */ |
| 673 | |
| 674 | vlsi_fill_rx(r); |
| 675 | |
| 676 | if (ring_first(r) == NULL) { |
| 677 | /* we are in big trouble, if this should ever happen */ |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 678 | IRDA_ERROR("%s: rx ring exhausted!\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | vlsi_ring_debug(r); |
| 680 | } |
| 681 | else |
| 682 | outw(0, ndev->base_addr+VLSI_PIO_PROMPT); |
| 683 | } |
| 684 | |
| 685 | /* caller must have stopped the controller from busmastering */ |
| 686 | |
| 687 | static void vlsi_unarm_rx(vlsi_irda_dev_t *idev) |
| 688 | { |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 689 | struct net_device *ndev = pci_get_drvdata(idev->pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | struct vlsi_ring *r = idev->rx_ring; |
| 691 | struct ring_descr *rd; |
| 692 | int ret; |
| 693 | |
| 694 | for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) { |
| 695 | |
| 696 | ret = 0; |
| 697 | if (rd_is_active(rd)) { |
| 698 | rd_set_status(rd, 0); |
| 699 | if (rd_get_count(rd)) { |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 700 | IRDA_DEBUG(0, "%s - dropping rx packet\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | ret = -VLSI_RX_DROP; |
| 702 | } |
| 703 | rd_set_count(rd, 0); |
| 704 | pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir); |
| 705 | if (rd->skb) { |
| 706 | dev_kfree_skb_any(rd->skb); |
| 707 | rd->skb = NULL; |
| 708 | } |
| 709 | } |
| 710 | else |
| 711 | ret = vlsi_process_rx(r, rd); |
| 712 | |
| 713 | if (ret < 0) { |
| 714 | ret = -ret; |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 715 | ndev->stats.rx_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | if (ret & VLSI_RX_DROP) |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 717 | ndev->stats.rx_dropped++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | if (ret & VLSI_RX_OVER) |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 719 | ndev->stats.rx_over_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | if (ret & VLSI_RX_LENGTH) |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 721 | ndev->stats.rx_length_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | if (ret & VLSI_RX_FRAME) |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 723 | ndev->stats.rx_frame_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | if (ret & VLSI_RX_CRC) |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 725 | ndev->stats.rx_crc_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | } |
| 727 | else if (ret > 0) { |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 728 | ndev->stats.rx_packets++; |
| 729 | ndev->stats.rx_bytes += ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | } |
| 731 | } |
| 732 | } |
| 733 | |
| 734 | /********************************************************/ |
| 735 | |
| 736 | static int vlsi_process_tx(struct vlsi_ring *r, struct ring_descr *rd) |
| 737 | { |
| 738 | u16 status; |
| 739 | int len; |
| 740 | int ret; |
| 741 | |
| 742 | pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir); |
| 743 | /* dma buffer now owned by the CPU */ |
| 744 | status = rd_get_status(rd); |
| 745 | if (status & RD_TX_UNDRN) |
| 746 | ret = VLSI_TX_FIFO; |
| 747 | else |
| 748 | ret = 0; |
| 749 | rd_set_status(rd, 0); |
| 750 | |
| 751 | if (rd->skb) { |
| 752 | len = rd->skb->len; |
| 753 | dev_kfree_skb_any(rd->skb); |
| 754 | rd->skb = NULL; |
| 755 | } |
| 756 | else /* tx-skb already freed? - should never happen */ |
| 757 | len = rd_get_count(rd); /* incorrect for SIR! (due to wrapping) */ |
| 758 | |
| 759 | rd_set_count(rd, 0); |
| 760 | /* dma buffer still owned by the CPU */ |
| 761 | |
| 762 | return (ret) ? -ret : len; |
| 763 | } |
| 764 | |
| 765 | static int vlsi_set_baud(vlsi_irda_dev_t *idev, unsigned iobase) |
| 766 | { |
| 767 | u16 nphyctl; |
| 768 | u16 config; |
| 769 | unsigned mode; |
| 770 | int ret; |
| 771 | int baudrate; |
| 772 | int fifocnt; |
| 773 | |
| 774 | baudrate = idev->new_baud; |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 775 | IRDA_DEBUG(2, "%s: %d -> %d\n", __func__, idev->baud, idev->new_baud); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 776 | if (baudrate == 4000000) { |
| 777 | mode = IFF_FIR; |
| 778 | config = IRCFG_FIR; |
| 779 | nphyctl = PHYCTL_FIR; |
| 780 | } |
| 781 | else if (baudrate == 1152000) { |
| 782 | mode = IFF_MIR; |
| 783 | config = IRCFG_MIR | IRCFG_CRC16; |
| 784 | nphyctl = PHYCTL_MIR(clksrc==3); |
| 785 | } |
| 786 | else { |
| 787 | mode = IFF_SIR; |
| 788 | config = IRCFG_SIR | IRCFG_SIRFILT | IRCFG_RXANY; |
| 789 | switch(baudrate) { |
| 790 | default: |
| 791 | IRDA_WARNING("%s: undefined baudrate %d - fallback to 9600!\n", |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 792 | __func__, baudrate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | baudrate = 9600; |
| 794 | /* fallthru */ |
| 795 | case 2400: |
| 796 | case 9600: |
| 797 | case 19200: |
| 798 | case 38400: |
| 799 | case 57600: |
| 800 | case 115200: |
| 801 | nphyctl = PHYCTL_SIR(baudrate,sirpulse,clksrc==3); |
| 802 | break; |
| 803 | } |
| 804 | } |
| 805 | config |= IRCFG_MSTR | IRCFG_ENRX; |
| 806 | |
| 807 | fifocnt = inw(iobase+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK; |
| 808 | if (fifocnt != 0) { |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 809 | IRDA_DEBUG(0, "%s: rx fifo not empty(%d)\n", __func__, fifocnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | } |
| 811 | |
| 812 | outw(0, iobase+VLSI_PIO_IRENABLE); |
| 813 | outw(config, iobase+VLSI_PIO_IRCFG); |
| 814 | outw(nphyctl, iobase+VLSI_PIO_NPHYCTL); |
| 815 | wmb(); |
| 816 | outw(IRENABLE_PHYANDCLOCK, iobase+VLSI_PIO_IRENABLE); |
| 817 | mb(); |
| 818 | |
| 819 | udelay(1); /* chip applies IRCFG on next rising edge of its 8MHz clock */ |
| 820 | |
| 821 | /* read back settings for validation */ |
| 822 | |
| 823 | config = inw(iobase+VLSI_PIO_IRENABLE) & IRENABLE_MASK; |
| 824 | |
| 825 | if (mode == IFF_FIR) |
| 826 | config ^= IRENABLE_FIR_ON; |
| 827 | else if (mode == IFF_MIR) |
| 828 | config ^= (IRENABLE_MIR_ON|IRENABLE_CRC16_ON); |
| 829 | else |
| 830 | config ^= IRENABLE_SIR_ON; |
| 831 | |
| 832 | if (config != (IRENABLE_PHYANDCLOCK|IRENABLE_ENRXST)) { |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 833 | IRDA_WARNING("%s: failed to set %s mode!\n", __func__, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | (mode==IFF_SIR)?"SIR":((mode==IFF_MIR)?"MIR":"FIR")); |
| 835 | ret = -1; |
| 836 | } |
| 837 | else { |
| 838 | if (inw(iobase+VLSI_PIO_PHYCTL) != nphyctl) { |
| 839 | IRDA_WARNING("%s: failed to apply baudrate %d\n", |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 840 | __func__, baudrate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | ret = -1; |
| 842 | } |
| 843 | else { |
| 844 | idev->mode = mode; |
| 845 | idev->baud = baudrate; |
| 846 | idev->new_baud = 0; |
| 847 | ret = 0; |
| 848 | } |
| 849 | } |
| 850 | |
| 851 | if (ret) |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 852 | vlsi_reg_debug(iobase,__func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | |
| 854 | return ret; |
| 855 | } |
| 856 | |
| 857 | static int vlsi_hard_start_xmit(struct sk_buff *skb, struct net_device *ndev) |
| 858 | { |
Wang Chen | 4cf1653 | 2008-11-12 23:38:14 -0800 | [diff] [blame] | 859 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | struct vlsi_ring *r = idev->tx_ring; |
| 861 | struct ring_descr *rd; |
| 862 | unsigned long flags; |
| 863 | unsigned iobase = ndev->base_addr; |
| 864 | u8 status; |
| 865 | u16 config; |
| 866 | int mtt; |
| 867 | int len, speed; |
| 868 | struct timeval now, ready; |
| 869 | char *msg = NULL; |
| 870 | |
| 871 | speed = irda_get_next_speed(skb); |
| 872 | spin_lock_irqsave(&idev->lock, flags); |
| 873 | if (speed != -1 && speed != idev->baud) { |
| 874 | netif_stop_queue(ndev); |
| 875 | idev->new_baud = speed; |
| 876 | status = RD_TX_CLRENTX; /* stop tx-ring after this frame */ |
| 877 | } |
| 878 | else |
| 879 | status = 0; |
| 880 | |
| 881 | if (skb->len == 0) { |
| 882 | /* handle zero packets - should be speed change */ |
| 883 | if (status == 0) { |
| 884 | msg = "bogus zero-length packet"; |
| 885 | goto drop_unlock; |
| 886 | } |
| 887 | |
| 888 | /* due to the completely asynch tx operation we might have |
| 889 | * IrLAP racing with the hardware here, f.e. if the controller |
| 890 | * is just sending the last packet with current speed while |
| 891 | * the LAP is already switching the speed using synchronous |
| 892 | * len=0 packet. Immediate execution would lead to hw lockup |
| 893 | * requiring a powercycle to reset. Good candidate to trigger |
| 894 | * this is the final UA:RSP packet after receiving a DISC:CMD |
| 895 | * when getting the LAP down. |
| 896 | * Note that we are not protected by the queue_stop approach |
| 897 | * because the final UA:RSP arrives _without_ request to apply |
| 898 | * new-speed-after-this-packet - hence the driver doesn't know |
| 899 | * this was the last packet and doesn't stop the queue. So the |
| 900 | * forced switch to default speed from LAP gets through as fast |
| 901 | * as only some 10 usec later while the UA:RSP is still processed |
| 902 | * by the hardware and we would get screwed. |
| 903 | */ |
| 904 | |
| 905 | if (ring_first(idev->tx_ring) == NULL) { |
| 906 | /* no race - tx-ring already empty */ |
| 907 | vlsi_set_baud(idev, iobase); |
| 908 | netif_wake_queue(ndev); |
| 909 | } |
| 910 | else |
| 911 | ; |
| 912 | /* keep the speed change pending like it would |
| 913 | * for any len>0 packet. tx completion interrupt |
| 914 | * will apply it when the tx ring becomes empty. |
| 915 | */ |
| 916 | spin_unlock_irqrestore(&idev->lock, flags); |
| 917 | dev_kfree_skb_any(skb); |
| 918 | return 0; |
| 919 | } |
| 920 | |
| 921 | /* sanity checks - simply drop the packet */ |
| 922 | |
| 923 | rd = ring_last(r); |
| 924 | if (!rd) { |
| 925 | msg = "ring full, but queue wasn't stopped"; |
| 926 | goto drop_unlock; |
| 927 | } |
| 928 | |
| 929 | if (rd_is_active(rd)) { |
| 930 | msg = "entry still owned by hw"; |
| 931 | goto drop_unlock; |
| 932 | } |
| 933 | |
| 934 | if (!rd->buf) { |
| 935 | msg = "tx ring entry without pci buffer"; |
| 936 | goto drop_unlock; |
| 937 | } |
| 938 | |
| 939 | if (rd->skb) { |
| 940 | msg = "ring entry with old skb still attached"; |
| 941 | goto drop_unlock; |
| 942 | } |
| 943 | |
| 944 | /* no need for serialization or interrupt disable during mtt */ |
| 945 | spin_unlock_irqrestore(&idev->lock, flags); |
| 946 | |
| 947 | if ((mtt = irda_get_mtt(skb)) > 0) { |
| 948 | |
| 949 | ready.tv_usec = idev->last_rx.tv_usec + mtt; |
| 950 | ready.tv_sec = idev->last_rx.tv_sec; |
| 951 | if (ready.tv_usec >= 1000000) { |
| 952 | ready.tv_usec -= 1000000; |
| 953 | ready.tv_sec++; /* IrLAP 1.1: mtt always < 1 sec */ |
| 954 | } |
| 955 | for(;;) { |
| 956 | do_gettimeofday(&now); |
| 957 | if (now.tv_sec > ready.tv_sec |
| 958 | || (now.tv_sec==ready.tv_sec && now.tv_usec>=ready.tv_usec)) |
| 959 | break; |
| 960 | udelay(100); |
Herbert Xu | 932ff27 | 2006-06-09 12:20:56 -0700 | [diff] [blame] | 961 | /* must not sleep here - called under netif_tx_lock! */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | } |
| 963 | } |
| 964 | |
| 965 | /* tx buffer already owned by CPU due to pci_dma_sync_single_for_cpu() |
| 966 | * after subsequent tx-completion |
| 967 | */ |
| 968 | |
| 969 | if (idev->mode == IFF_SIR) { |
| 970 | status |= RD_TX_DISCRC; /* no hw-crc creation */ |
| 971 | len = async_wrap_skb(skb, rd->buf, r->len); |
| 972 | |
| 973 | /* Some rare worst case situation in SIR mode might lead to |
| 974 | * potential buffer overflow. The wrapper detects this, returns |
| 975 | * with a shortened frame (without FCS/EOF) but doesn't provide |
| 976 | * any error indication about the invalid packet which we are |
| 977 | * going to transmit. |
| 978 | * Therefore we log if the buffer got filled to the point, where the |
| 979 | * wrapper would abort, i.e. when there are less than 5 bytes left to |
| 980 | * allow appending the FCS/EOF. |
| 981 | */ |
| 982 | |
| 983 | if (len >= r->len-5) |
| 984 | IRDA_WARNING("%s: possible buffer overflow with SIR wrapping!\n", |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 985 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 986 | } |
| 987 | else { |
| 988 | /* hw deals with MIR/FIR mode wrapping */ |
| 989 | status |= RD_TX_PULSE; /* send 2 us highspeed indication pulse */ |
| 990 | len = skb->len; |
| 991 | if (len > r->len) { |
| 992 | msg = "frame exceeds tx buffer length"; |
| 993 | goto drop; |
| 994 | } |
| 995 | else |
Arnaldo Carvalho de Melo | d626f62 | 2007-03-27 18:55:52 -0300 | [diff] [blame] | 996 | skb_copy_from_linear_data(skb, rd->buf, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | } |
| 998 | |
| 999 | rd->skb = skb; /* remember skb for tx-complete stats */ |
| 1000 | |
| 1001 | rd_set_count(rd, len); |
| 1002 | rd_set_status(rd, status); /* not yet active! */ |
| 1003 | |
| 1004 | /* give dma buffer back to busmaster-hw (flush caches to make |
| 1005 | * CPU-driven changes visible from the pci bus). |
| 1006 | */ |
| 1007 | |
| 1008 | pci_dma_sync_single_for_device(r->pdev, rd_get_addr(rd), r->len, r->dir); |
| 1009 | |
| 1010 | /* Switching to TX mode here races with the controller |
| 1011 | * which may stop TX at any time when fetching an inactive descriptor |
| 1012 | * or one with CLR_ENTX set. So we switch on TX only, if TX was not running |
| 1013 | * _after_ the new descriptor was activated on the ring. This ensures |
| 1014 | * we will either find TX already stopped or we can be sure, there |
| 1015 | * will be a TX-complete interrupt even if the chip stopped doing |
| 1016 | * TX just after we found it still running. The ISR will then find |
| 1017 | * the non-empty ring and restart TX processing. The enclosing |
| 1018 | * spinlock provides the correct serialization to prevent race with isr. |
| 1019 | */ |
| 1020 | |
| 1021 | spin_lock_irqsave(&idev->lock,flags); |
| 1022 | |
| 1023 | rd_activate(rd); |
| 1024 | |
| 1025 | if (!(inw(iobase+VLSI_PIO_IRENABLE) & IRENABLE_ENTXST)) { |
| 1026 | int fifocnt; |
| 1027 | |
| 1028 | fifocnt = inw(ndev->base_addr+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK; |
| 1029 | if (fifocnt != 0) { |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 1030 | IRDA_DEBUG(0, "%s: rx fifo not empty(%d)\n", __func__, fifocnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | } |
| 1032 | |
| 1033 | config = inw(iobase+VLSI_PIO_IRCFG); |
| 1034 | mb(); |
| 1035 | outw(config | IRCFG_ENTX, iobase+VLSI_PIO_IRCFG); |
| 1036 | wmb(); |
| 1037 | outw(0, iobase+VLSI_PIO_PROMPT); |
| 1038 | } |
| 1039 | ndev->trans_start = jiffies; |
| 1040 | |
| 1041 | if (ring_put(r) == NULL) { |
| 1042 | netif_stop_queue(ndev); |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 1043 | IRDA_DEBUG(3, "%s: tx ring full - queue stopped\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | } |
| 1045 | spin_unlock_irqrestore(&idev->lock, flags); |
| 1046 | |
| 1047 | return 0; |
| 1048 | |
| 1049 | drop_unlock: |
| 1050 | spin_unlock_irqrestore(&idev->lock, flags); |
| 1051 | drop: |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 1052 | IRDA_WARNING("%s: dropping packet - %s\n", __func__, msg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | dev_kfree_skb_any(skb); |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 1054 | ndev->stats.tx_errors++; |
| 1055 | ndev->stats.tx_dropped++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | /* Don't even think about returning NET_XMIT_DROP (=1) here! |
| 1057 | * In fact any retval!=0 causes the packet scheduler to requeue the |
| 1058 | * packet for later retry of transmission - which isn't exactly |
| 1059 | * what we want after we've just called dev_kfree_skb_any ;-) |
| 1060 | */ |
| 1061 | return 0; |
| 1062 | } |
| 1063 | |
| 1064 | static void vlsi_tx_interrupt(struct net_device *ndev) |
| 1065 | { |
Wang Chen | 4cf1653 | 2008-11-12 23:38:14 -0800 | [diff] [blame] | 1066 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | struct vlsi_ring *r = idev->tx_ring; |
| 1068 | struct ring_descr *rd; |
| 1069 | unsigned iobase; |
| 1070 | int ret; |
| 1071 | u16 config; |
| 1072 | |
| 1073 | for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) { |
| 1074 | |
| 1075 | if (rd_is_active(rd)) |
| 1076 | break; |
| 1077 | |
| 1078 | ret = vlsi_process_tx(r, rd); |
| 1079 | |
| 1080 | if (ret < 0) { |
| 1081 | ret = -ret; |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 1082 | ndev->stats.tx_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | if (ret & VLSI_TX_DROP) |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 1084 | ndev->stats.tx_dropped++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1085 | if (ret & VLSI_TX_FIFO) |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 1086 | ndev->stats.tx_fifo_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | } |
| 1088 | else if (ret > 0){ |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 1089 | ndev->stats.tx_packets++; |
| 1090 | ndev->stats.tx_bytes += ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | } |
| 1092 | } |
| 1093 | |
| 1094 | iobase = ndev->base_addr; |
| 1095 | |
| 1096 | if (idev->new_baud && rd == NULL) /* tx ring empty and speed change pending */ |
| 1097 | vlsi_set_baud(idev, iobase); |
| 1098 | |
| 1099 | config = inw(iobase+VLSI_PIO_IRCFG); |
| 1100 | if (rd == NULL) /* tx ring empty: re-enable rx */ |
| 1101 | outw((config & ~IRCFG_ENTX) | IRCFG_ENRX, iobase+VLSI_PIO_IRCFG); |
| 1102 | |
| 1103 | else if (!(inw(iobase+VLSI_PIO_IRENABLE) & IRENABLE_ENTXST)) { |
| 1104 | int fifocnt; |
| 1105 | |
| 1106 | fifocnt = inw(iobase+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK; |
| 1107 | if (fifocnt != 0) { |
| 1108 | IRDA_DEBUG(0, "%s: rx fifo not empty(%d)\n", |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 1109 | __func__, fifocnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | } |
| 1111 | outw(config | IRCFG_ENTX, iobase+VLSI_PIO_IRCFG); |
| 1112 | } |
| 1113 | |
| 1114 | outw(0, iobase+VLSI_PIO_PROMPT); |
| 1115 | |
| 1116 | if (netif_queue_stopped(ndev) && !idev->new_baud) { |
| 1117 | netif_wake_queue(ndev); |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 1118 | IRDA_DEBUG(3, "%s: queue awoken\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | } |
| 1120 | } |
| 1121 | |
| 1122 | /* caller must have stopped the controller from busmastering */ |
| 1123 | |
| 1124 | static void vlsi_unarm_tx(vlsi_irda_dev_t *idev) |
| 1125 | { |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 1126 | struct net_device *ndev = pci_get_drvdata(idev->pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | struct vlsi_ring *r = idev->tx_ring; |
| 1128 | struct ring_descr *rd; |
| 1129 | int ret; |
| 1130 | |
| 1131 | for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) { |
| 1132 | |
| 1133 | ret = 0; |
| 1134 | if (rd_is_active(rd)) { |
| 1135 | rd_set_status(rd, 0); |
| 1136 | rd_set_count(rd, 0); |
| 1137 | pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir); |
| 1138 | if (rd->skb) { |
| 1139 | dev_kfree_skb_any(rd->skb); |
| 1140 | rd->skb = NULL; |
| 1141 | } |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 1142 | IRDA_DEBUG(0, "%s - dropping tx packet\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1143 | ret = -VLSI_TX_DROP; |
| 1144 | } |
| 1145 | else |
| 1146 | ret = vlsi_process_tx(r, rd); |
| 1147 | |
| 1148 | if (ret < 0) { |
| 1149 | ret = -ret; |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 1150 | ndev->stats.tx_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | if (ret & VLSI_TX_DROP) |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 1152 | ndev->stats.tx_dropped++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1153 | if (ret & VLSI_TX_FIFO) |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 1154 | ndev->stats.tx_fifo_errors++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1155 | } |
| 1156 | else if (ret > 0){ |
Stephen Hemminger | af04908 | 2009-01-06 10:40:43 -0800 | [diff] [blame] | 1157 | ndev->stats.tx_packets++; |
| 1158 | ndev->stats.tx_bytes += ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1159 | } |
| 1160 | } |
| 1161 | |
| 1162 | } |
| 1163 | |
| 1164 | /********************************************************/ |
| 1165 | |
| 1166 | static int vlsi_start_clock(struct pci_dev *pdev) |
| 1167 | { |
| 1168 | u8 clkctl, lock; |
| 1169 | int i, count; |
| 1170 | |
| 1171 | if (clksrc < 2) { /* auto or PLL: try PLL */ |
| 1172 | clkctl = CLKCTL_PD_INV | CLKCTL_CLKSTP; |
| 1173 | pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl); |
| 1174 | |
| 1175 | /* procedure to detect PLL lock synchronisation: |
| 1176 | * after 0.5 msec initial delay we expect to find 3 PLL lock |
| 1177 | * indications within 10 msec for successful PLL detection. |
| 1178 | */ |
| 1179 | udelay(500); |
| 1180 | count = 0; |
| 1181 | for (i = 500; i <= 10000; i += 50) { /* max 10 msec */ |
| 1182 | pci_read_config_byte(pdev, VLSI_PCI_CLKCTL, &lock); |
| 1183 | if (lock&CLKCTL_LOCK) { |
| 1184 | if (++count >= 3) |
| 1185 | break; |
| 1186 | } |
| 1187 | udelay(50); |
| 1188 | } |
| 1189 | if (count < 3) { |
| 1190 | if (clksrc == 1) { /* explicitly asked for PLL hence bail out */ |
| 1191 | IRDA_ERROR("%s: no PLL or failed to lock!\n", |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 1192 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | clkctl = CLKCTL_CLKSTP; |
| 1194 | pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl); |
| 1195 | return -1; |
| 1196 | } |
| 1197 | else /* was: clksrc=0(auto) */ |
| 1198 | clksrc = 3; /* fallback to 40MHz XCLK (OB800) */ |
| 1199 | |
| 1200 | IRDA_DEBUG(0, "%s: PLL not locked, fallback to clksrc=%d\n", |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 1201 | __func__, clksrc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1202 | } |
| 1203 | else |
| 1204 | clksrc = 1; /* got successful PLL lock */ |
| 1205 | } |
| 1206 | |
| 1207 | if (clksrc != 1) { |
| 1208 | /* we get here if either no PLL detected in auto-mode or |
| 1209 | an external clock source was explicitly specified */ |
| 1210 | |
| 1211 | clkctl = CLKCTL_EXTCLK | CLKCTL_CLKSTP; |
| 1212 | if (clksrc == 3) |
| 1213 | clkctl |= CLKCTL_XCKSEL; |
| 1214 | pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl); |
| 1215 | |
| 1216 | /* no way to test for working XCLK */ |
| 1217 | } |
| 1218 | else |
| 1219 | pci_read_config_byte(pdev, VLSI_PCI_CLKCTL, &clkctl); |
| 1220 | |
| 1221 | /* ok, now going to connect the chip with the clock source */ |
| 1222 | |
| 1223 | clkctl &= ~CLKCTL_CLKSTP; |
| 1224 | pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl); |
| 1225 | |
| 1226 | return 0; |
| 1227 | } |
| 1228 | |
| 1229 | static void vlsi_stop_clock(struct pci_dev *pdev) |
| 1230 | { |
| 1231 | u8 clkctl; |
| 1232 | |
| 1233 | /* disconnect chip from clock source */ |
| 1234 | pci_read_config_byte(pdev, VLSI_PCI_CLKCTL, &clkctl); |
| 1235 | clkctl |= CLKCTL_CLKSTP; |
| 1236 | pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl); |
| 1237 | |
| 1238 | /* disable all clock sources */ |
| 1239 | clkctl &= ~(CLKCTL_EXTCLK | CLKCTL_PD_INV); |
| 1240 | pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl); |
| 1241 | } |
| 1242 | |
| 1243 | /********************************************************/ |
| 1244 | |
| 1245 | /* writing all-zero to the VLSI PCI IO register area seems to prevent |
| 1246 | * some occasional situations where the hardware fails (symptoms are |
| 1247 | * what appears as stalled tx/rx state machines, i.e. everything ok for |
| 1248 | * receive or transmit but hw makes no progress or is unable to access |
| 1249 | * the bus memory locations). |
| 1250 | * Best place to call this is immediately after/before the internal clock |
| 1251 | * gets started/stopped. |
| 1252 | */ |
| 1253 | |
| 1254 | static inline void vlsi_clear_regs(unsigned iobase) |
| 1255 | { |
| 1256 | unsigned i; |
| 1257 | const unsigned chip_io_extent = 32; |
| 1258 | |
| 1259 | for (i = 0; i < chip_io_extent; i += sizeof(u16)) |
| 1260 | outw(0, iobase + i); |
| 1261 | } |
| 1262 | |
| 1263 | static int vlsi_init_chip(struct pci_dev *pdev) |
| 1264 | { |
| 1265 | struct net_device *ndev = pci_get_drvdata(pdev); |
Wang Chen | 4cf1653 | 2008-11-12 23:38:14 -0800 | [diff] [blame] | 1266 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1267 | unsigned iobase; |
| 1268 | u16 ptr; |
| 1269 | |
| 1270 | /* start the clock and clean the registers */ |
| 1271 | |
| 1272 | if (vlsi_start_clock(pdev)) { |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 1273 | IRDA_ERROR("%s: no valid clock source\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | return -1; |
| 1275 | } |
| 1276 | iobase = ndev->base_addr; |
| 1277 | vlsi_clear_regs(iobase); |
| 1278 | |
| 1279 | outb(IRINTR_INT_MASK, iobase+VLSI_PIO_IRINTR); /* w/c pending IRQ, disable all INT */ |
| 1280 | |
| 1281 | outw(0, iobase+VLSI_PIO_IRENABLE); /* disable IrPHY-interface */ |
| 1282 | |
| 1283 | /* disable everything, particularly IRCFG_MSTR - (also resetting the RING_PTR) */ |
| 1284 | |
| 1285 | outw(0, iobase+VLSI_PIO_IRCFG); |
| 1286 | wmb(); |
| 1287 | |
| 1288 | outw(MAX_PACKET_LENGTH, iobase+VLSI_PIO_MAXPKT); /* max possible value=0x0fff */ |
| 1289 | |
| 1290 | outw(BUS_TO_RINGBASE(idev->busaddr), iobase+VLSI_PIO_RINGBASE); |
| 1291 | |
| 1292 | outw(TX_RX_TO_RINGSIZE(idev->tx_ring->size, idev->rx_ring->size), |
| 1293 | iobase+VLSI_PIO_RINGSIZE); |
| 1294 | |
| 1295 | ptr = inw(iobase+VLSI_PIO_RINGPTR); |
| 1296 | atomic_set(&idev->rx_ring->head, RINGPTR_GET_RX(ptr)); |
| 1297 | atomic_set(&idev->rx_ring->tail, RINGPTR_GET_RX(ptr)); |
| 1298 | atomic_set(&idev->tx_ring->head, RINGPTR_GET_TX(ptr)); |
| 1299 | atomic_set(&idev->tx_ring->tail, RINGPTR_GET_TX(ptr)); |
| 1300 | |
| 1301 | vlsi_set_baud(idev, iobase); /* idev->new_baud used as provided by caller */ |
| 1302 | |
| 1303 | outb(IRINTR_INT_MASK, iobase+VLSI_PIO_IRINTR); /* just in case - w/c pending IRQ's */ |
| 1304 | wmb(); |
| 1305 | |
| 1306 | /* DO NOT BLINDLY ENABLE IRINTR_ACTEN! |
| 1307 | * basically every received pulse fires an ACTIVITY-INT |
| 1308 | * leading to >>1000 INT's per second instead of few 10 |
| 1309 | */ |
| 1310 | |
| 1311 | outb(IRINTR_RPKTEN|IRINTR_TPKTEN, iobase+VLSI_PIO_IRINTR); |
| 1312 | |
| 1313 | return 0; |
| 1314 | } |
| 1315 | |
| 1316 | static int vlsi_start_hw(vlsi_irda_dev_t *idev) |
| 1317 | { |
| 1318 | struct pci_dev *pdev = idev->pdev; |
| 1319 | struct net_device *ndev = pci_get_drvdata(pdev); |
| 1320 | unsigned iobase = ndev->base_addr; |
| 1321 | u8 byte; |
| 1322 | |
| 1323 | /* we don't use the legacy UART, disable its address decoding */ |
| 1324 | |
| 1325 | pci_read_config_byte(pdev, VLSI_PCI_IRMISC, &byte); |
| 1326 | byte &= ~(IRMISC_UARTEN | IRMISC_UARTTST); |
| 1327 | pci_write_config_byte(pdev, VLSI_PCI_IRMISC, byte); |
| 1328 | |
| 1329 | /* enable PCI busmaster access to our 16MB page */ |
| 1330 | |
| 1331 | pci_write_config_byte(pdev, VLSI_PCI_MSTRPAGE, MSTRPAGE_VALUE); |
| 1332 | pci_set_master(pdev); |
| 1333 | |
| 1334 | if (vlsi_init_chip(pdev) < 0) { |
| 1335 | pci_disable_device(pdev); |
| 1336 | return -1; |
| 1337 | } |
| 1338 | |
| 1339 | vlsi_fill_rx(idev->rx_ring); |
| 1340 | |
| 1341 | do_gettimeofday(&idev->last_rx); /* first mtt may start from now on */ |
| 1342 | |
| 1343 | outw(0, iobase+VLSI_PIO_PROMPT); /* kick hw state machine */ |
| 1344 | |
| 1345 | return 0; |
| 1346 | } |
| 1347 | |
| 1348 | static int vlsi_stop_hw(vlsi_irda_dev_t *idev) |
| 1349 | { |
| 1350 | struct pci_dev *pdev = idev->pdev; |
| 1351 | struct net_device *ndev = pci_get_drvdata(pdev); |
| 1352 | unsigned iobase = ndev->base_addr; |
| 1353 | unsigned long flags; |
| 1354 | |
| 1355 | spin_lock_irqsave(&idev->lock,flags); |
| 1356 | outw(0, iobase+VLSI_PIO_IRENABLE); |
| 1357 | outw(0, iobase+VLSI_PIO_IRCFG); /* disable everything */ |
| 1358 | |
| 1359 | /* disable and w/c irqs */ |
| 1360 | outb(0, iobase+VLSI_PIO_IRINTR); |
| 1361 | wmb(); |
| 1362 | outb(IRINTR_INT_MASK, iobase+VLSI_PIO_IRINTR); |
| 1363 | spin_unlock_irqrestore(&idev->lock,flags); |
| 1364 | |
| 1365 | vlsi_unarm_tx(idev); |
| 1366 | vlsi_unarm_rx(idev); |
| 1367 | |
| 1368 | vlsi_clear_regs(iobase); |
| 1369 | vlsi_stop_clock(pdev); |
| 1370 | |
| 1371 | pci_disable_device(pdev); |
| 1372 | |
| 1373 | return 0; |
| 1374 | } |
| 1375 | |
| 1376 | /**************************************************************/ |
| 1377 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1378 | static void vlsi_tx_timeout(struct net_device *ndev) |
| 1379 | { |
Wang Chen | 4cf1653 | 2008-11-12 23:38:14 -0800 | [diff] [blame] | 1380 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1381 | |
| 1382 | |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 1383 | vlsi_reg_debug(ndev->base_addr, __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1384 | vlsi_ring_debug(idev->tx_ring); |
| 1385 | |
| 1386 | if (netif_running(ndev)) |
| 1387 | netif_stop_queue(ndev); |
| 1388 | |
| 1389 | vlsi_stop_hw(idev); |
| 1390 | |
| 1391 | /* now simply restart the whole thing */ |
| 1392 | |
| 1393 | if (!idev->new_baud) |
| 1394 | idev->new_baud = idev->baud; /* keep current baudrate */ |
| 1395 | |
| 1396 | if (vlsi_start_hw(idev)) |
| 1397 | IRDA_ERROR("%s: failed to restart hw - %s(%s) unusable!\n", |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 1398 | __func__, pci_name(idev->pdev), ndev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1399 | else |
| 1400 | netif_start_queue(ndev); |
| 1401 | } |
| 1402 | |
| 1403 | static int vlsi_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd) |
| 1404 | { |
Wang Chen | 4cf1653 | 2008-11-12 23:38:14 -0800 | [diff] [blame] | 1405 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1406 | struct if_irda_req *irq = (struct if_irda_req *) rq; |
| 1407 | unsigned long flags; |
| 1408 | u16 fifocnt; |
| 1409 | int ret = 0; |
| 1410 | |
| 1411 | switch (cmd) { |
| 1412 | case SIOCSBANDWIDTH: |
| 1413 | if (!capable(CAP_NET_ADMIN)) { |
| 1414 | ret = -EPERM; |
| 1415 | break; |
| 1416 | } |
| 1417 | spin_lock_irqsave(&idev->lock, flags); |
| 1418 | idev->new_baud = irq->ifr_baudrate; |
| 1419 | /* when called from userland there might be a minor race window here |
| 1420 | * if the stack tries to change speed concurrently - which would be |
| 1421 | * pretty strange anyway with the userland having full control... |
| 1422 | */ |
| 1423 | vlsi_set_baud(idev, ndev->base_addr); |
| 1424 | spin_unlock_irqrestore(&idev->lock, flags); |
| 1425 | break; |
| 1426 | case SIOCSMEDIABUSY: |
| 1427 | if (!capable(CAP_NET_ADMIN)) { |
| 1428 | ret = -EPERM; |
| 1429 | break; |
| 1430 | } |
| 1431 | irda_device_set_media_busy(ndev, TRUE); |
| 1432 | break; |
| 1433 | case SIOCGRECEIVING: |
| 1434 | /* the best we can do: check whether there are any bytes in rx fifo. |
| 1435 | * The trustable window (in case some data arrives just afterwards) |
| 1436 | * may be as short as 1usec or so at 4Mbps. |
| 1437 | */ |
| 1438 | fifocnt = inw(ndev->base_addr+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK; |
| 1439 | irq->ifr_receiving = (fifocnt!=0) ? 1 : 0; |
| 1440 | break; |
| 1441 | default: |
| 1442 | IRDA_WARNING("%s: notsupp - cmd=%04x\n", |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 1443 | __func__, cmd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1444 | ret = -EOPNOTSUPP; |
| 1445 | } |
| 1446 | |
| 1447 | return ret; |
| 1448 | } |
| 1449 | |
| 1450 | /********************************************************/ |
| 1451 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 1452 | static irqreturn_t vlsi_interrupt(int irq, void *dev_instance) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1453 | { |
| 1454 | struct net_device *ndev = dev_instance; |
Wang Chen | 4cf1653 | 2008-11-12 23:38:14 -0800 | [diff] [blame] | 1455 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1456 | unsigned iobase; |
| 1457 | u8 irintr; |
| 1458 | int boguscount = 5; |
| 1459 | unsigned long flags; |
| 1460 | int handled = 0; |
| 1461 | |
| 1462 | iobase = ndev->base_addr; |
| 1463 | spin_lock_irqsave(&idev->lock,flags); |
| 1464 | do { |
| 1465 | irintr = inb(iobase+VLSI_PIO_IRINTR); |
| 1466 | mb(); |
| 1467 | outb(irintr, iobase+VLSI_PIO_IRINTR); /* acknowledge asap */ |
| 1468 | |
| 1469 | if (!(irintr&=IRINTR_INT_MASK)) /* not our INT - probably shared */ |
| 1470 | break; |
| 1471 | |
| 1472 | handled = 1; |
| 1473 | |
| 1474 | if (unlikely(!(irintr & ~IRINTR_ACTIVITY))) |
| 1475 | break; /* nothing todo if only activity */ |
| 1476 | |
| 1477 | if (irintr&IRINTR_RPKTINT) |
| 1478 | vlsi_rx_interrupt(ndev); |
| 1479 | |
| 1480 | if (irintr&IRINTR_TPKTINT) |
| 1481 | vlsi_tx_interrupt(ndev); |
| 1482 | |
| 1483 | } while (--boguscount > 0); |
| 1484 | spin_unlock_irqrestore(&idev->lock,flags); |
| 1485 | |
| 1486 | if (boguscount <= 0) |
| 1487 | IRDA_MESSAGE("%s: too much work in interrupt!\n", |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 1488 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1489 | return IRQ_RETVAL(handled); |
| 1490 | } |
| 1491 | |
| 1492 | /********************************************************/ |
| 1493 | |
| 1494 | static int vlsi_open(struct net_device *ndev) |
| 1495 | { |
Wang Chen | 4cf1653 | 2008-11-12 23:38:14 -0800 | [diff] [blame] | 1496 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1497 | int err = -EAGAIN; |
| 1498 | char hwname[32]; |
| 1499 | |
| 1500 | if (pci_request_regions(idev->pdev, drivername)) { |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 1501 | IRDA_WARNING("%s: io resource busy\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1502 | goto errout; |
| 1503 | } |
| 1504 | ndev->base_addr = pci_resource_start(idev->pdev,0); |
| 1505 | ndev->irq = idev->pdev->irq; |
| 1506 | |
| 1507 | /* under some rare occasions the chip apparently comes up with |
| 1508 | * IRQ's pending. We better w/c pending IRQ and disable them all |
| 1509 | */ |
| 1510 | |
| 1511 | outb(IRINTR_INT_MASK, ndev->base_addr+VLSI_PIO_IRINTR); |
| 1512 | |
Thomas Gleixner | 1fb9df5 | 2006-07-01 19:29:39 -0700 | [diff] [blame] | 1513 | if (request_irq(ndev->irq, vlsi_interrupt, IRQF_SHARED, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1514 | drivername, ndev)) { |
| 1515 | IRDA_WARNING("%s: couldn't get IRQ: %d\n", |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 1516 | __func__, ndev->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1517 | goto errout_io; |
| 1518 | } |
| 1519 | |
| 1520 | if ((err = vlsi_create_hwif(idev)) != 0) |
| 1521 | goto errout_irq; |
| 1522 | |
| 1523 | sprintf(hwname, "VLSI-FIR @ 0x%04x", (unsigned)ndev->base_addr); |
| 1524 | idev->irlap = irlap_open(ndev,&idev->qos,hwname); |
| 1525 | if (!idev->irlap) |
| 1526 | goto errout_free_ring; |
| 1527 | |
| 1528 | do_gettimeofday(&idev->last_rx); /* first mtt may start from now on */ |
| 1529 | |
| 1530 | idev->new_baud = 9600; /* start with IrPHY using 9600(SIR) mode */ |
| 1531 | |
| 1532 | if ((err = vlsi_start_hw(idev)) != 0) |
| 1533 | goto errout_close_irlap; |
| 1534 | |
| 1535 | netif_start_queue(ndev); |
| 1536 | |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 1537 | IRDA_MESSAGE("%s: device %s operational\n", __func__, ndev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1538 | |
| 1539 | return 0; |
| 1540 | |
| 1541 | errout_close_irlap: |
| 1542 | irlap_close(idev->irlap); |
| 1543 | errout_free_ring: |
| 1544 | vlsi_destroy_hwif(idev); |
| 1545 | errout_irq: |
| 1546 | free_irq(ndev->irq,ndev); |
| 1547 | errout_io: |
| 1548 | pci_release_regions(idev->pdev); |
| 1549 | errout: |
| 1550 | return err; |
| 1551 | } |
| 1552 | |
| 1553 | static int vlsi_close(struct net_device *ndev) |
| 1554 | { |
Wang Chen | 4cf1653 | 2008-11-12 23:38:14 -0800 | [diff] [blame] | 1555 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1556 | |
| 1557 | netif_stop_queue(ndev); |
| 1558 | |
| 1559 | if (idev->irlap) |
| 1560 | irlap_close(idev->irlap); |
| 1561 | idev->irlap = NULL; |
| 1562 | |
| 1563 | vlsi_stop_hw(idev); |
| 1564 | |
| 1565 | vlsi_destroy_hwif(idev); |
| 1566 | |
| 1567 | free_irq(ndev->irq,ndev); |
| 1568 | |
| 1569 | pci_release_regions(idev->pdev); |
| 1570 | |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 1571 | IRDA_MESSAGE("%s: device %s stopped\n", __func__, ndev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1572 | |
| 1573 | return 0; |
| 1574 | } |
| 1575 | |
Stephen Hemminger | 30a5d7f | 2009-03-20 19:35:41 +0000 | [diff] [blame] | 1576 | static const struct net_device_ops vlsi_netdev_ops = { |
| 1577 | .ndo_open = vlsi_open, |
| 1578 | .ndo_stop = vlsi_close, |
| 1579 | .ndo_start_xmit = vlsi_hard_start_xmit, |
| 1580 | .ndo_do_ioctl = vlsi_ioctl, |
| 1581 | .ndo_tx_timeout = vlsi_tx_timeout, |
| 1582 | }; |
| 1583 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1584 | static int vlsi_irda_init(struct net_device *ndev) |
| 1585 | { |
Wang Chen | 4cf1653 | 2008-11-12 23:38:14 -0800 | [diff] [blame] | 1586 | vlsi_irda_dev_t *idev = netdev_priv(ndev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1587 | struct pci_dev *pdev = idev->pdev; |
| 1588 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1589 | ndev->irq = pdev->irq; |
| 1590 | ndev->base_addr = pci_resource_start(pdev,0); |
| 1591 | |
| 1592 | /* PCI busmastering |
| 1593 | * see include file for details why we need these 2 masks, in this order! |
| 1594 | */ |
| 1595 | |
| 1596 | if (pci_set_dma_mask(pdev,DMA_MASK_USED_BY_HW) |
| 1597 | || pci_set_dma_mask(pdev,DMA_MASK_MSTRPAGE)) { |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 1598 | IRDA_ERROR("%s: aborting due to PCI BM-DMA address limitations\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1599 | return -1; |
| 1600 | } |
| 1601 | |
| 1602 | irda_init_max_qos_capabilies(&idev->qos); |
| 1603 | |
| 1604 | /* the VLSI82C147 does not support 576000! */ |
| 1605 | |
| 1606 | idev->qos.baud_rate.bits = IR_2400 | IR_9600 |
| 1607 | | IR_19200 | IR_38400 | IR_57600 | IR_115200 |
| 1608 | | IR_1152000 | (IR_4000000 << 8); |
| 1609 | |
| 1610 | idev->qos.min_turn_time.bits = qos_mtt_bits; |
| 1611 | |
| 1612 | irda_qos_bits_to_value(&idev->qos); |
| 1613 | |
| 1614 | /* currently no public media definitions for IrDA */ |
| 1615 | |
| 1616 | ndev->flags |= IFF_PORTSEL | IFF_AUTOMEDIA; |
| 1617 | ndev->if_port = IF_PORT_UNKNOWN; |
| 1618 | |
Stephen Hemminger | 30a5d7f | 2009-03-20 19:35:41 +0000 | [diff] [blame] | 1619 | ndev->netdev_ops = &vlsi_netdev_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1620 | ndev->watchdog_timeo = 500*HZ/1000; /* max. allowed turn time for IrLAP */ |
| 1621 | |
| 1622 | SET_NETDEV_DEV(ndev, &pdev->dev); |
| 1623 | |
| 1624 | return 0; |
| 1625 | } |
| 1626 | |
| 1627 | /**************************************************************/ |
| 1628 | |
| 1629 | static int __devinit |
| 1630 | vlsi_irda_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
| 1631 | { |
| 1632 | struct net_device *ndev; |
| 1633 | vlsi_irda_dev_t *idev; |
| 1634 | |
| 1635 | if (pci_enable_device(pdev)) |
| 1636 | goto out; |
| 1637 | else |
| 1638 | pdev->current_state = 0; /* hw must be running now */ |
| 1639 | |
| 1640 | IRDA_MESSAGE("%s: IrDA PCI controller %s detected\n", |
Adrian Bunk | 778a43f | 2007-01-23 21:16:40 -0800 | [diff] [blame] | 1641 | drivername, pci_name(pdev)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1642 | |
| 1643 | if ( !pci_resource_start(pdev,0) |
| 1644 | || !(pci_resource_flags(pdev,0) & IORESOURCE_IO) ) { |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 1645 | IRDA_ERROR("%s: bar 0 invalid", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1646 | goto out_disable; |
| 1647 | } |
| 1648 | |
| 1649 | ndev = alloc_irdadev(sizeof(*idev)); |
| 1650 | if (ndev==NULL) { |
| 1651 | IRDA_ERROR("%s: Unable to allocate device memory.\n", |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 1652 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1653 | goto out_disable; |
| 1654 | } |
| 1655 | |
Wang Chen | 4cf1653 | 2008-11-12 23:38:14 -0800 | [diff] [blame] | 1656 | idev = netdev_priv(ndev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1657 | |
| 1658 | spin_lock_init(&idev->lock); |
Matthias Kaehlcke | aa42911 | 2007-07-09 13:18:12 -0700 | [diff] [blame] | 1659 | mutex_init(&idev->mtx); |
| 1660 | mutex_lock(&idev->mtx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1661 | idev->pdev = pdev; |
| 1662 | |
| 1663 | if (vlsi_irda_init(ndev) < 0) |
| 1664 | goto out_freedev; |
| 1665 | |
| 1666 | if (register_netdev(ndev) < 0) { |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 1667 | IRDA_ERROR("%s: register_netdev failed\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1668 | goto out_freedev; |
| 1669 | } |
| 1670 | |
| 1671 | if (vlsi_proc_root != NULL) { |
| 1672 | struct proc_dir_entry *ent; |
| 1673 | |
Denis V. Lunev | a95609c | 2008-04-29 01:02:29 -0700 | [diff] [blame] | 1674 | ent = proc_create_data(ndev->name, S_IFREG|S_IRUGO, |
| 1675 | vlsi_proc_root, VLSI_PROC_FOPS, ndev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1676 | if (!ent) { |
| 1677 | IRDA_WARNING("%s: failed to create proc entry\n", |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 1678 | __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1679 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1680 | ent->size = 0; |
| 1681 | } |
| 1682 | idev->proc_entry = ent; |
| 1683 | } |
| 1684 | IRDA_MESSAGE("%s: registered device %s\n", drivername, ndev->name); |
| 1685 | |
| 1686 | pci_set_drvdata(pdev, ndev); |
Matthias Kaehlcke | aa42911 | 2007-07-09 13:18:12 -0700 | [diff] [blame] | 1687 | mutex_unlock(&idev->mtx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1688 | |
| 1689 | return 0; |
| 1690 | |
| 1691 | out_freedev: |
Matthias Kaehlcke | aa42911 | 2007-07-09 13:18:12 -0700 | [diff] [blame] | 1692 | mutex_unlock(&idev->mtx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1693 | free_netdev(ndev); |
| 1694 | out_disable: |
| 1695 | pci_disable_device(pdev); |
| 1696 | out: |
| 1697 | pci_set_drvdata(pdev, NULL); |
| 1698 | return -ENODEV; |
| 1699 | } |
| 1700 | |
| 1701 | static void __devexit vlsi_irda_remove(struct pci_dev *pdev) |
| 1702 | { |
| 1703 | struct net_device *ndev = pci_get_drvdata(pdev); |
| 1704 | vlsi_irda_dev_t *idev; |
| 1705 | |
| 1706 | if (!ndev) { |
| 1707 | IRDA_ERROR("%s: lost netdevice?\n", drivername); |
| 1708 | return; |
| 1709 | } |
| 1710 | |
| 1711 | unregister_netdev(ndev); |
| 1712 | |
Wang Chen | 4cf1653 | 2008-11-12 23:38:14 -0800 | [diff] [blame] | 1713 | idev = netdev_priv(ndev); |
Matthias Kaehlcke | aa42911 | 2007-07-09 13:18:12 -0700 | [diff] [blame] | 1714 | mutex_lock(&idev->mtx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1715 | if (idev->proc_entry) { |
| 1716 | remove_proc_entry(ndev->name, vlsi_proc_root); |
| 1717 | idev->proc_entry = NULL; |
| 1718 | } |
Matthias Kaehlcke | aa42911 | 2007-07-09 13:18:12 -0700 | [diff] [blame] | 1719 | mutex_unlock(&idev->mtx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1720 | |
| 1721 | free_netdev(ndev); |
| 1722 | |
| 1723 | pci_set_drvdata(pdev, NULL); |
| 1724 | |
Adrian Bunk | 778a43f | 2007-01-23 21:16:40 -0800 | [diff] [blame] | 1725 | IRDA_MESSAGE("%s: %s removed\n", drivername, pci_name(pdev)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1726 | } |
| 1727 | |
| 1728 | #ifdef CONFIG_PM |
| 1729 | |
| 1730 | /* The Controller doesn't provide PCI PM capabilities as defined by PCI specs. |
| 1731 | * Some of the Linux PCI-PM code however depends on this, for example in |
| 1732 | * pci_set_power_state(). So we have to take care to perform the required |
| 1733 | * operations on our own (particularly reflecting the pdev->current_state) |
| 1734 | * otherwise we might get cheated by pci-pm. |
| 1735 | */ |
| 1736 | |
| 1737 | |
Pavel Machek | 05adc3b | 2005-04-16 15:25:25 -0700 | [diff] [blame] | 1738 | 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] | 1739 | { |
| 1740 | struct net_device *ndev = pci_get_drvdata(pdev); |
| 1741 | vlsi_irda_dev_t *idev; |
| 1742 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1743 | if (!ndev) { |
| 1744 | IRDA_ERROR("%s - %s: no netdevice \n", |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 1745 | __func__, pci_name(pdev)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1746 | return 0; |
| 1747 | } |
Wang Chen | 4cf1653 | 2008-11-12 23:38:14 -0800 | [diff] [blame] | 1748 | idev = netdev_priv(ndev); |
Matthias Kaehlcke | aa42911 | 2007-07-09 13:18:12 -0700 | [diff] [blame] | 1749 | mutex_lock(&idev->mtx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1750 | if (pdev->current_state != 0) { /* already suspended */ |
Pavel Machek | ca078ba | 2005-09-03 15:56:57 -0700 | [diff] [blame] | 1751 | if (state.event > pdev->current_state) { /* simply go deeper */ |
| 1752 | pci_set_power_state(pdev, pci_choose_state(pdev, state)); |
| 1753 | pdev->current_state = state.event; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1754 | } |
| 1755 | else |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 1756 | IRDA_ERROR("%s - %s: invalid suspend request %u -> %u\n", __func__, pci_name(pdev), pdev->current_state, state.event); |
Matthias Kaehlcke | aa42911 | 2007-07-09 13:18:12 -0700 | [diff] [blame] | 1757 | mutex_unlock(&idev->mtx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1758 | return 0; |
| 1759 | } |
| 1760 | |
| 1761 | if (netif_running(ndev)) { |
| 1762 | netif_device_detach(ndev); |
| 1763 | vlsi_stop_hw(idev); |
| 1764 | pci_save_state(pdev); |
| 1765 | if (!idev->new_baud) |
| 1766 | /* remember speed settings to restore on resume */ |
| 1767 | idev->new_baud = idev->baud; |
| 1768 | } |
| 1769 | |
Pavel Machek | 829ca9a | 2005-09-03 15:56:56 -0700 | [diff] [blame] | 1770 | pci_set_power_state(pdev, pci_choose_state(pdev, state)); |
Pavel Machek | ca078ba | 2005-09-03 15:56:57 -0700 | [diff] [blame] | 1771 | pdev->current_state = state.event; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1772 | idev->resume_ok = 1; |
Matthias Kaehlcke | aa42911 | 2007-07-09 13:18:12 -0700 | [diff] [blame] | 1773 | mutex_unlock(&idev->mtx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1774 | return 0; |
| 1775 | } |
| 1776 | |
| 1777 | static int vlsi_irda_resume(struct pci_dev *pdev) |
| 1778 | { |
| 1779 | struct net_device *ndev = pci_get_drvdata(pdev); |
| 1780 | vlsi_irda_dev_t *idev; |
| 1781 | |
| 1782 | if (!ndev) { |
| 1783 | IRDA_ERROR("%s - %s: no netdevice \n", |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 1784 | __func__, pci_name(pdev)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1785 | return 0; |
| 1786 | } |
Wang Chen | 4cf1653 | 2008-11-12 23:38:14 -0800 | [diff] [blame] | 1787 | idev = netdev_priv(ndev); |
Matthias Kaehlcke | aa42911 | 2007-07-09 13:18:12 -0700 | [diff] [blame] | 1788 | mutex_lock(&idev->mtx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1789 | if (pdev->current_state == 0) { |
Matthias Kaehlcke | aa42911 | 2007-07-09 13:18:12 -0700 | [diff] [blame] | 1790 | mutex_unlock(&idev->mtx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1791 | IRDA_WARNING("%s - %s: already resumed\n", |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 1792 | __func__, pci_name(pdev)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1793 | return 0; |
| 1794 | } |
| 1795 | |
Pavel Machek | 829ca9a | 2005-09-03 15:56:56 -0700 | [diff] [blame] | 1796 | pci_set_power_state(pdev, PCI_D0); |
| 1797 | pdev->current_state = PM_EVENT_ON; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1798 | |
| 1799 | if (!idev->resume_ok) { |
| 1800 | /* should be obsolete now - but used to happen due to: |
| 1801 | * - pci layer initially setting pdev->current_state = 4 (unknown) |
| 1802 | * - pci layer did not walk the save_state-tree (might be APM problem) |
| 1803 | * so we could not refuse to suspend from undefined state |
| 1804 | * - vlsi_irda_suspend detected invalid state and refused to save |
| 1805 | * configuration for resume - but was too late to stop suspending |
| 1806 | * - vlsi_irda_resume got screwed when trying to resume from garbage |
| 1807 | * |
| 1808 | * now we explicitly set pdev->current_state = 0 after enabling the |
| 1809 | * device and independently resume_ok should catch any garbage config. |
| 1810 | */ |
Harvey Harrison | a97a6f1 | 2008-07-30 17:20:18 -0700 | [diff] [blame] | 1811 | IRDA_WARNING("%s - hm, nothing to resume?\n", __func__); |
Matthias Kaehlcke | aa42911 | 2007-07-09 13:18:12 -0700 | [diff] [blame] | 1812 | mutex_unlock(&idev->mtx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1813 | return 0; |
| 1814 | } |
| 1815 | |
| 1816 | if (netif_running(ndev)) { |
| 1817 | pci_restore_state(pdev); |
| 1818 | vlsi_start_hw(idev); |
| 1819 | netif_device_attach(ndev); |
| 1820 | } |
| 1821 | idev->resume_ok = 0; |
Matthias Kaehlcke | aa42911 | 2007-07-09 13:18:12 -0700 | [diff] [blame] | 1822 | mutex_unlock(&idev->mtx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1823 | return 0; |
| 1824 | } |
| 1825 | |
| 1826 | #endif /* CONFIG_PM */ |
| 1827 | |
| 1828 | /*********************************************************/ |
| 1829 | |
| 1830 | static struct pci_driver vlsi_irda_driver = { |
| 1831 | .name = drivername, |
| 1832 | .id_table = vlsi_irda_table, |
| 1833 | .probe = vlsi_irda_probe, |
| 1834 | .remove = __devexit_p(vlsi_irda_remove), |
| 1835 | #ifdef CONFIG_PM |
| 1836 | .suspend = vlsi_irda_suspend, |
| 1837 | .resume = vlsi_irda_resume, |
| 1838 | #endif |
| 1839 | }; |
| 1840 | |
| 1841 | #define PROC_DIR ("driver/" DRIVER_NAME) |
| 1842 | |
| 1843 | static int __init vlsi_mod_init(void) |
| 1844 | { |
| 1845 | int i, ret; |
| 1846 | |
| 1847 | if (clksrc < 0 || clksrc > 3) { |
| 1848 | IRDA_ERROR("%s: invalid clksrc=%d\n", drivername, clksrc); |
| 1849 | return -1; |
| 1850 | } |
| 1851 | |
| 1852 | for (i = 0; i < 2; i++) { |
| 1853 | switch(ringsize[i]) { |
| 1854 | case 4: |
| 1855 | case 8: |
| 1856 | case 16: |
| 1857 | case 32: |
| 1858 | case 64: |
| 1859 | break; |
| 1860 | default: |
| 1861 | IRDA_WARNING("%s: invalid %s ringsize %d, using default=8", drivername, (i)?"rx":"tx", ringsize[i]); |
| 1862 | ringsize[i] = 8; |
| 1863 | break; |
| 1864 | } |
| 1865 | } |
| 1866 | |
| 1867 | sirpulse = !!sirpulse; |
| 1868 | |
Al Viro | 6660022 | 2005-09-28 22:32:57 +0100 | [diff] [blame] | 1869 | /* proc_mkdir returns NULL if !CONFIG_PROC_FS. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1870 | * Failure to create the procfs entry is handled like running |
| 1871 | * without procfs - it's not required for the driver to work. |
| 1872 | */ |
Al Viro | 6660022 | 2005-09-28 22:32:57 +0100 | [diff] [blame] | 1873 | vlsi_proc_root = proc_mkdir(PROC_DIR, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1874 | |
Christophe Lucas | a85d771 | 2006-03-20 19:00:27 -0800 | [diff] [blame] | 1875 | ret = pci_register_driver(&vlsi_irda_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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); |