| /********************************************************************* |
| * |
| * vlsi_ir.c: VLSI82C147 PCI IrDA controller driver for Linux |
| * |
| * Copyright (c) 2001-2003 Martin Diehl |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; either version 2 of |
| * the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, see <http://www.gnu.org/licenses/>. |
| * |
| ********************************************************************/ |
| |
| #include <linux/module.h> |
| |
| #define DRIVER_NAME "vlsi_ir" |
| #define DRIVER_VERSION "v0.5" |
| #define DRIVER_DESCRIPTION "IrDA SIR/MIR/FIR driver for VLSI 82C147" |
| #define DRIVER_AUTHOR "Martin Diehl <info@mdiehl.de>" |
| |
| MODULE_DESCRIPTION(DRIVER_DESCRIPTION); |
| MODULE_AUTHOR(DRIVER_AUTHOR); |
| MODULE_LICENSE("GPL"); |
| |
| /********************************************************/ |
| |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/interrupt.h> |
| #include <linux/pci.h> |
| #include <linux/slab.h> |
| #include <linux/netdevice.h> |
| #include <linux/skbuff.h> |
| #include <linux/delay.h> |
| #include <linux/time.h> |
| #include <linux/proc_fs.h> |
| #include <linux/seq_file.h> |
| #include <linux/mutex.h> |
| #include <asm/uaccess.h> |
| #include <asm/byteorder.h> |
| |
| #include <net/irda/irda.h> |
| #include <net/irda/irda_device.h> |
| #include <net/irda/wrapper.h> |
| #include <net/irda/crc.h> |
| |
| #include "vlsi_ir.h" |
| |
| /********************************************************/ |
| |
| static /* const */ char drivername[] = DRIVER_NAME; |
| |
| static DEFINE_PCI_DEVICE_TABLE(vlsi_irda_table) = { |
| { |
| .class = PCI_CLASS_WIRELESS_IRDA << 8, |
| .class_mask = PCI_CLASS_SUBCLASS_MASK << 8, |
| .vendor = PCI_VENDOR_ID_VLSI, |
| .device = PCI_DEVICE_ID_VLSI_82C147, |
| .subvendor = PCI_ANY_ID, |
| .subdevice = PCI_ANY_ID, |
| }, |
| { /* all zeroes */ } |
| }; |
| |
| MODULE_DEVICE_TABLE(pci, vlsi_irda_table); |
| |
| /********************************************************/ |
| |
| /* clksrc: which clock source to be used |
| * 0: auto - try PLL, fallback to 40MHz XCLK |
| * 1: on-chip 48MHz PLL |
| * 2: external 48MHz XCLK |
| * 3: external 40MHz XCLK (HP OB-800) |
| */ |
| |
| static int clksrc = 0; /* default is 0(auto) */ |
| module_param(clksrc, int, 0); |
| MODULE_PARM_DESC(clksrc, "clock input source selection"); |
| |
| /* ringsize: size of the tx and rx descriptor rings |
| * independent for tx and rx |
| * specify as ringsize=tx[,rx] |
| * allowed values: 4, 8, 16, 32, 64 |
| * Due to the IrDA 1.x max. allowed window size=7, |
| * there should be no gain when using rings larger than 8 |
| */ |
| |
| static int ringsize[] = {8,8}; /* default is tx=8 / rx=8 */ |
| module_param_array(ringsize, int, NULL, 0); |
| MODULE_PARM_DESC(ringsize, "TX, RX ring descriptor size"); |
| |
| /* sirpulse: tuning of the SIR pulse width within IrPHY 1.3 limits |
| * 0: very short, 1.5us (exception: 6us at 2.4 kbaud) |
| * 1: nominal 3/16 bittime width |
| * note: IrDA compliant peer devices should be happy regardless |
| * which one is used. Primary goal is to save some power |
| * on the sender's side - at 9.6kbaud for example the short |
| * pulse width saves more than 90% of the transmitted IR power. |
| */ |
| |
| static int sirpulse = 1; /* default is 3/16 bittime */ |
| module_param(sirpulse, int, 0); |
| MODULE_PARM_DESC(sirpulse, "SIR pulse width tuning"); |
| |
| /* qos_mtt_bits: encoded min-turn-time value we require the peer device |
| * to use before transmitting to us. "Type 1" (per-station) |
| * bitfield according to IrLAP definition (section 6.6.8) |
| * Don't know which transceiver is used by my OB800 - the |
| * pretty common HP HDLS-1100 requires 1 msec - so lets use this. |
| */ |
| |
| static int qos_mtt_bits = 0x07; /* default is 1 ms or more */ |
| module_param(qos_mtt_bits, int, 0); |
| MODULE_PARM_DESC(qos_mtt_bits, "IrLAP bitfield representing min-turn-time"); |
| |
| /********************************************************/ |
| |
| static void vlsi_reg_debug(unsigned iobase, const char *s) |
| { |
| int i; |
| |
| printk(KERN_DEBUG "%s: ", s); |
| for (i = 0; i < 0x20; i++) |
| printk("%02x", (unsigned)inb((iobase+i))); |
| printk("\n"); |
| } |
| |
| static void vlsi_ring_debug(struct vlsi_ring *r) |
| { |
| struct ring_descr *rd; |
| unsigned i; |
| |
| printk(KERN_DEBUG "%s - ring %p / size %u / mask 0x%04x / len %u / dir %d / hw %p\n", |
| __func__, r, r->size, r->mask, r->len, r->dir, r->rd[0].hw); |
| printk(KERN_DEBUG "%s - head = %d / tail = %d\n", __func__, |
| atomic_read(&r->head) & r->mask, atomic_read(&r->tail) & r->mask); |
| for (i = 0; i < r->size; i++) { |
| rd = &r->rd[i]; |
| printk(KERN_DEBUG "%s - ring descr %u: ", __func__, i); |
| printk("skb=%p data=%p hw=%p\n", rd->skb, rd->buf, rd->hw); |
| printk(KERN_DEBUG "%s - hw: status=%02x count=%u addr=0x%08x\n", |
| __func__, (unsigned) rd_get_status(rd), |
| (unsigned) rd_get_count(rd), (unsigned) rd_get_addr(rd)); |
| } |
| } |
| |
| /********************************************************/ |
| |
| /* needed regardless of CONFIG_PROC_FS */ |
| static struct proc_dir_entry *vlsi_proc_root = NULL; |
| |
| #ifdef CONFIG_PROC_FS |
| |
| static void vlsi_proc_pdev(struct seq_file *seq, struct pci_dev *pdev) |
| { |
| unsigned iobase = pci_resource_start(pdev, 0); |
| unsigned i; |
| |
| seq_printf(seq, "\n%s (vid/did: [%04x:%04x])\n", |
| pci_name(pdev), (int)pdev->vendor, (int)pdev->device); |
| seq_printf(seq, "pci-power-state: %u\n", (unsigned) pdev->current_state); |
| seq_printf(seq, "resources: irq=%u / io=0x%04x / dma_mask=0x%016Lx\n", |
| pdev->irq, (unsigned)pci_resource_start(pdev, 0), (unsigned long long)pdev->dma_mask); |
| seq_printf(seq, "hw registers: "); |
| for (i = 0; i < 0x20; i++) |
| seq_printf(seq, "%02x", (unsigned)inb((iobase+i))); |
| seq_printf(seq, "\n"); |
| } |
| |
| static void vlsi_proc_ndev(struct seq_file *seq, struct net_device *ndev) |
| { |
| vlsi_irda_dev_t *idev = netdev_priv(ndev); |
| u8 byte; |
| u16 word; |
| unsigned delta1, delta2; |
| struct timeval now; |
| unsigned iobase = ndev->base_addr; |
| |
| seq_printf(seq, "\n%s link state: %s / %s / %s / %s\n", ndev->name, |
| netif_device_present(ndev) ? "attached" : "detached", |
| netif_running(ndev) ? "running" : "not running", |
| netif_carrier_ok(ndev) ? "carrier ok" : "no carrier", |
| netif_queue_stopped(ndev) ? "queue stopped" : "queue running"); |
| |
| if (!netif_running(ndev)) |
| return; |
| |
| seq_printf(seq, "\nhw-state:\n"); |
| pci_read_config_byte(idev->pdev, VLSI_PCI_IRMISC, &byte); |
| seq_printf(seq, "IRMISC:%s%s%s uart%s", |
| (byte&IRMISC_IRRAIL) ? " irrail" : "", |
| (byte&IRMISC_IRPD) ? " irpd" : "", |
| (byte&IRMISC_UARTTST) ? " uarttest" : "", |
| (byte&IRMISC_UARTEN) ? "@" : " disabled\n"); |
| if (byte&IRMISC_UARTEN) { |
| seq_printf(seq, "0x%s\n", |
| (byte&2) ? ((byte&1) ? "3e8" : "2e8") |
| : ((byte&1) ? "3f8" : "2f8")); |
| } |
| pci_read_config_byte(idev->pdev, VLSI_PCI_CLKCTL, &byte); |
| seq_printf(seq, "CLKCTL: PLL %s%s%s / clock %s / wakeup %s\n", |
| (byte&CLKCTL_PD_INV) ? "powered" : "down", |
| (byte&CLKCTL_LOCK) ? " locked" : "", |
| (byte&CLKCTL_EXTCLK) ? ((byte&CLKCTL_XCKSEL)?" / 40 MHz XCLK":" / 48 MHz XCLK") : "", |
| (byte&CLKCTL_CLKSTP) ? "stopped" : "running", |
| (byte&CLKCTL_WAKE) ? "enabled" : "disabled"); |
| pci_read_config_byte(idev->pdev, VLSI_PCI_MSTRPAGE, &byte); |
| seq_printf(seq, "MSTRPAGE: 0x%02x\n", (unsigned)byte); |
| |
| byte = inb(iobase+VLSI_PIO_IRINTR); |
| seq_printf(seq, "IRINTR:%s%s%s%s%s%s%s%s\n", |
| (byte&IRINTR_ACTEN) ? " ACTEN" : "", |
| (byte&IRINTR_RPKTEN) ? " RPKTEN" : "", |
| (byte&IRINTR_TPKTEN) ? " TPKTEN" : "", |
| (byte&IRINTR_OE_EN) ? " OE_EN" : "", |
| (byte&IRINTR_ACTIVITY) ? " ACTIVITY" : "", |
| (byte&IRINTR_RPKTINT) ? " RPKTINT" : "", |
| (byte&IRINTR_TPKTINT) ? " TPKTINT" : "", |
| (byte&IRINTR_OE_INT) ? " OE_INT" : ""); |
| word = inw(iobase+VLSI_PIO_RINGPTR); |
| seq_printf(seq, "RINGPTR: rx=%u / tx=%u\n", RINGPTR_GET_RX(word), RINGPTR_GET_TX(word)); |
| word = inw(iobase+VLSI_PIO_RINGBASE); |
| seq_printf(seq, "RINGBASE: busmap=0x%08x\n", |
| ((unsigned)word << 10)|(MSTRPAGE_VALUE<<24)); |
| word = inw(iobase+VLSI_PIO_RINGSIZE); |
| seq_printf(seq, "RINGSIZE: rx=%u / tx=%u\n", RINGSIZE_TO_RXSIZE(word), |
| RINGSIZE_TO_TXSIZE(word)); |
| |
| word = inw(iobase+VLSI_PIO_IRCFG); |
| seq_printf(seq, "IRCFG:%s%s%s%s%s%s%s%s%s%s%s%s%s\n", |
| (word&IRCFG_LOOP) ? " LOOP" : "", |
| (word&IRCFG_ENTX) ? " ENTX" : "", |
| (word&IRCFG_ENRX) ? " ENRX" : "", |
| (word&IRCFG_MSTR) ? " MSTR" : "", |
| (word&IRCFG_RXANY) ? " RXANY" : "", |
| (word&IRCFG_CRC16) ? " CRC16" : "", |
| (word&IRCFG_FIR) ? " FIR" : "", |
| (word&IRCFG_MIR) ? " MIR" : "", |
| (word&IRCFG_SIR) ? " SIR" : "", |
| (word&IRCFG_SIRFILT) ? " SIRFILT" : "", |
| (word&IRCFG_SIRTEST) ? " SIRTEST" : "", |
| (word&IRCFG_TXPOL) ? " TXPOL" : "", |
| (word&IRCFG_RXPOL) ? " RXPOL" : ""); |
| word = inw(iobase+VLSI_PIO_IRENABLE); |
| seq_printf(seq, "IRENABLE:%s%s%s%s%s%s%s%s\n", |
| (word&IRENABLE_PHYANDCLOCK) ? " PHYANDCLOCK" : "", |
| (word&IRENABLE_CFGER) ? " CFGERR" : "", |
| (word&IRENABLE_FIR_ON) ? " FIR_ON" : "", |
| (word&IRENABLE_MIR_ON) ? " MIR_ON" : "", |
| (word&IRENABLE_SIR_ON) ? " SIR_ON" : "", |
| (word&IRENABLE_ENTXST) ? " ENTXST" : "", |
| (word&IRENABLE_ENRXST) ? " ENRXST" : "", |
| (word&IRENABLE_CRC16_ON) ? " CRC16_ON" : ""); |
| word = inw(iobase+VLSI_PIO_PHYCTL); |
| seq_printf(seq, "PHYCTL: baud-divisor=%u / pulsewidth=%u / preamble=%u\n", |
| (unsigned)PHYCTL_TO_BAUD(word), |
| (unsigned)PHYCTL_TO_PLSWID(word), |
| (unsigned)PHYCTL_TO_PREAMB(word)); |
| word = inw(iobase+VLSI_PIO_NPHYCTL); |
| seq_printf(seq, "NPHYCTL: baud-divisor=%u / pulsewidth=%u / preamble=%u\n", |
| (unsigned)PHYCTL_TO_BAUD(word), |
| (unsigned)PHYCTL_TO_PLSWID(word), |
| (unsigned)PHYCTL_TO_PREAMB(word)); |
| word = inw(iobase+VLSI_PIO_MAXPKT); |
| seq_printf(seq, "MAXPKT: max. rx packet size = %u\n", word); |
| word = inw(iobase+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK; |
| seq_printf(seq, "RCVBCNT: rx-fifo filling level = %u\n", word); |
| |
| seq_printf(seq, "\nsw-state:\n"); |
| seq_printf(seq, "IrPHY setup: %d baud - %s encoding\n", idev->baud, |
| (idev->mode==IFF_SIR)?"SIR":((idev->mode==IFF_MIR)?"MIR":"FIR")); |
| do_gettimeofday(&now); |
| if (now.tv_usec >= idev->last_rx.tv_usec) { |
| delta2 = now.tv_usec - idev->last_rx.tv_usec; |
| delta1 = 0; |
| } |
| else { |
| delta2 = 1000000 + now.tv_usec - idev->last_rx.tv_usec; |
| delta1 = 1; |
| } |
| seq_printf(seq, "last rx: %lu.%06u sec\n", |
| now.tv_sec - idev->last_rx.tv_sec - delta1, delta2); |
| |
| seq_printf(seq, "RX: packets=%lu / bytes=%lu / errors=%lu / dropped=%lu", |
| ndev->stats.rx_packets, ndev->stats.rx_bytes, ndev->stats.rx_errors, |
| ndev->stats.rx_dropped); |
| seq_printf(seq, " / overrun=%lu / length=%lu / frame=%lu / crc=%lu\n", |
| ndev->stats.rx_over_errors, ndev->stats.rx_length_errors, |
| ndev->stats.rx_frame_errors, ndev->stats.rx_crc_errors); |
| seq_printf(seq, "TX: packets=%lu / bytes=%lu / errors=%lu / dropped=%lu / fifo=%lu\n", |
| ndev->stats.tx_packets, ndev->stats.tx_bytes, ndev->stats.tx_errors, |
| ndev->stats.tx_dropped, ndev->stats.tx_fifo_errors); |
| |
| } |
| |
| static void vlsi_proc_ring(struct seq_file *seq, struct vlsi_ring *r) |
| { |
| struct ring_descr *rd; |
| unsigned i, j; |
| int h, t; |
| |
| seq_printf(seq, "size %u / mask 0x%04x / len %u / dir %d / hw %p\n", |
| r->size, r->mask, r->len, r->dir, r->rd[0].hw); |
| h = atomic_read(&r->head) & r->mask; |
| t = atomic_read(&r->tail) & r->mask; |
| seq_printf(seq, "head = %d / tail = %d ", h, t); |
| if (h == t) |
| seq_printf(seq, "(empty)\n"); |
| else { |
| if (((t+1)&r->mask) == h) |
| seq_printf(seq, "(full)\n"); |
| else |
| seq_printf(seq, "(level = %d)\n", ((unsigned)(t-h) & r->mask)); |
| rd = &r->rd[h]; |
| j = (unsigned) rd_get_count(rd); |
| seq_printf(seq, "current: rd = %d / status = %02x / len = %u\n", |
| h, (unsigned)rd_get_status(rd), j); |
| if (j > 0) { |
| seq_printf(seq, " data:"); |
| if (j > 20) |
| j = 20; |
| for (i = 0; i < j; i++) |
| seq_printf(seq, " %02x", (unsigned)((unsigned char *)rd->buf)[i]); |
| seq_printf(seq, "\n"); |
| } |
| } |
| for (i = 0; i < r->size; i++) { |
| rd = &r->rd[i]; |
| seq_printf(seq, "> ring descr %u: ", i); |
| seq_printf(seq, "skb=%p data=%p hw=%p\n", rd->skb, rd->buf, rd->hw); |
| seq_printf(seq, " hw: status=%02x count=%u busaddr=0x%08x\n", |
| (unsigned) rd_get_status(rd), |
| (unsigned) rd_get_count(rd), (unsigned) rd_get_addr(rd)); |
| } |
| } |
| |
| static int vlsi_seq_show(struct seq_file *seq, void *v) |
| { |
| struct net_device *ndev = seq->private; |
| vlsi_irda_dev_t *idev = netdev_priv(ndev); |
| unsigned long flags; |
| |
| seq_printf(seq, "\n%s %s\n\n", DRIVER_NAME, DRIVER_VERSION); |
| seq_printf(seq, "clksrc: %s\n", |
| (clksrc>=2) ? ((clksrc==3)?"40MHz XCLK":"48MHz XCLK") |
| : ((clksrc==1)?"48MHz PLL":"autodetect")); |
| seq_printf(seq, "ringsize: tx=%d / rx=%d\n", |
| ringsize[0], ringsize[1]); |
| seq_printf(seq, "sirpulse: %s\n", (sirpulse)?"3/16 bittime":"short"); |
| seq_printf(seq, "qos_mtt_bits: 0x%02x\n", (unsigned)qos_mtt_bits); |
| |
| spin_lock_irqsave(&idev->lock, flags); |
| if (idev->pdev != NULL) { |
| vlsi_proc_pdev(seq, idev->pdev); |
| |
| if (idev->pdev->current_state == 0) |
| vlsi_proc_ndev(seq, ndev); |
| else |
| seq_printf(seq, "\nPCI controller down - resume_ok = %d\n", |
| idev->resume_ok); |
| if (netif_running(ndev) && idev->rx_ring && idev->tx_ring) { |
| seq_printf(seq, "\n--------- RX ring -----------\n\n"); |
| vlsi_proc_ring(seq, idev->rx_ring); |
| seq_printf(seq, "\n--------- TX ring -----------\n\n"); |
| vlsi_proc_ring(seq, idev->tx_ring); |
| } |
| } |
| seq_printf(seq, "\n"); |
| spin_unlock_irqrestore(&idev->lock, flags); |
| |
| return 0; |
| } |
| |
| static int vlsi_seq_open(struct inode *inode, struct file *file) |
| { |
| return single_open(file, vlsi_seq_show, PDE_DATA(inode)); |
| } |
| |
| static const struct file_operations vlsi_proc_fops = { |
| .owner = THIS_MODULE, |
| .open = vlsi_seq_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = single_release, |
| }; |
| |
| #define VLSI_PROC_FOPS (&vlsi_proc_fops) |
| |
| #else /* CONFIG_PROC_FS */ |
| #define VLSI_PROC_FOPS NULL |
| #endif |
| |
| /********************************************************/ |
| |
| static struct vlsi_ring *vlsi_alloc_ring(struct pci_dev *pdev, struct ring_descr_hw *hwmap, |
| unsigned size, unsigned len, int dir) |
| { |
| struct vlsi_ring *r; |
| struct ring_descr *rd; |
| unsigned i, j; |
| dma_addr_t busaddr; |
| |
| if (!size || ((size-1)&size)!=0) /* must be >0 and power of 2 */ |
| return NULL; |
| |
| r = kmalloc(sizeof(*r) + size * sizeof(struct ring_descr), GFP_KERNEL); |
| if (!r) |
| return NULL; |
| memset(r, 0, sizeof(*r)); |
| |
| r->pdev = pdev; |
| r->dir = dir; |
| r->len = len; |
| r->rd = (struct ring_descr *)(r+1); |
| r->mask = size - 1; |
| r->size = size; |
| atomic_set(&r->head, 0); |
| atomic_set(&r->tail, 0); |
| |
| for (i = 0; i < size; i++) { |
| rd = r->rd + i; |
| memset(rd, 0, sizeof(*rd)); |
| rd->hw = hwmap + i; |
| rd->buf = kmalloc(len, GFP_KERNEL|GFP_DMA); |
| if (rd->buf == NULL || |
| !(busaddr = pci_map_single(pdev, rd->buf, len, dir))) { |
| if (rd->buf) { |
| IRDA_ERROR("%s: failed to create PCI-MAP for %p", |
| __func__, rd->buf); |
| kfree(rd->buf); |
| rd->buf = NULL; |
| } |
| for (j = 0; j < i; j++) { |
| rd = r->rd + j; |
| busaddr = rd_get_addr(rd); |
| rd_set_addr_status(rd, 0, 0); |
| if (busaddr) |
| pci_unmap_single(pdev, busaddr, len, dir); |
| kfree(rd->buf); |
| rd->buf = NULL; |
| } |
| kfree(r); |
| return NULL; |
| } |
| rd_set_addr_status(rd, busaddr, 0); |
| /* initially, the dma buffer is owned by the CPU */ |
| rd->skb = NULL; |
| } |
| return r; |
| } |
| |
| static int vlsi_free_ring(struct vlsi_ring *r) |
| { |
| struct ring_descr *rd; |
| unsigned i; |
| dma_addr_t busaddr; |
| |
| for (i = 0; i < r->size; i++) { |
| rd = r->rd + i; |
| if (rd->skb) |
| dev_kfree_skb_any(rd->skb); |
| busaddr = rd_get_addr(rd); |
| rd_set_addr_status(rd, 0, 0); |
| if (busaddr) |
| pci_unmap_single(r->pdev, busaddr, r->len, r->dir); |
| kfree(rd->buf); |
| } |
| kfree(r); |
| return 0; |
| } |
| |
| static int vlsi_create_hwif(vlsi_irda_dev_t *idev) |
| { |
| char *ringarea; |
| struct ring_descr_hw *hwmap; |
| |
| idev->virtaddr = NULL; |
| idev->busaddr = 0; |
| |
| ringarea = pci_zalloc_consistent(idev->pdev, HW_RING_AREA_SIZE, |
| &idev->busaddr); |
| if (!ringarea) { |
| IRDA_ERROR("%s: insufficient memory for descriptor rings\n", |
| __func__); |
| goto out; |
| } |
| |
| hwmap = (struct ring_descr_hw *)ringarea; |
| idev->rx_ring = vlsi_alloc_ring(idev->pdev, hwmap, ringsize[1], |
| XFER_BUF_SIZE, PCI_DMA_FROMDEVICE); |
| if (idev->rx_ring == NULL) |
| goto out_unmap; |
| |
| hwmap += MAX_RING_DESCR; |
| idev->tx_ring = vlsi_alloc_ring(idev->pdev, hwmap, ringsize[0], |
| XFER_BUF_SIZE, PCI_DMA_TODEVICE); |
| if (idev->tx_ring == NULL) |
| goto out_free_rx; |
| |
| idev->virtaddr = ringarea; |
| return 0; |
| |
| out_free_rx: |
| vlsi_free_ring(idev->rx_ring); |
| out_unmap: |
| idev->rx_ring = idev->tx_ring = NULL; |
| pci_free_consistent(idev->pdev, HW_RING_AREA_SIZE, ringarea, idev->busaddr); |
| idev->busaddr = 0; |
| out: |
| return -ENOMEM; |
| } |
| |
| static int vlsi_destroy_hwif(vlsi_irda_dev_t *idev) |
| { |
| vlsi_free_ring(idev->rx_ring); |
| vlsi_free_ring(idev->tx_ring); |
| idev->rx_ring = idev->tx_ring = NULL; |
| |
| if (idev->busaddr) |
| pci_free_consistent(idev->pdev,HW_RING_AREA_SIZE,idev->virtaddr,idev->busaddr); |
| |
| idev->virtaddr = NULL; |
| idev->busaddr = 0; |
| |
| return 0; |
| } |
| |
| /********************************************************/ |
| |
| static int vlsi_process_rx(struct vlsi_ring *r, struct ring_descr *rd) |
| { |
| u16 status; |
| int crclen, len = 0; |
| struct sk_buff *skb; |
| int ret = 0; |
| struct net_device *ndev = pci_get_drvdata(r->pdev); |
| vlsi_irda_dev_t *idev = netdev_priv(ndev); |
| |
| pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir); |
| /* dma buffer now owned by the CPU */ |
| status = rd_get_status(rd); |
| if (status & RD_RX_ERROR) { |
| if (status & RD_RX_OVER) |
| ret |= VLSI_RX_OVER; |
| if (status & RD_RX_LENGTH) |
| ret |= VLSI_RX_LENGTH; |
| if (status & RD_RX_PHYERR) |
| ret |= VLSI_RX_FRAME; |
| if (status & RD_RX_CRCERR) |
| ret |= VLSI_RX_CRC; |
| goto done; |
| } |
| |
| len = rd_get_count(rd); |
| crclen = (idev->mode==IFF_FIR) ? sizeof(u32) : sizeof(u16); |
| len -= crclen; /* remove trailing CRC */ |
| if (len <= 0) { |
| IRDA_DEBUG(0, "%s: strange frame (len=%d)\n", __func__, len); |
| ret |= VLSI_RX_DROP; |
| goto done; |
| } |
| |
| if (idev->mode == IFF_SIR) { /* hw checks CRC in MIR, FIR mode */ |
| |
| /* rd->buf is a streaming PCI_DMA_FROMDEVICE map. Doing the |
| * endian-adjustment there just in place will dirty a cache line |
| * which belongs to the map and thus we must be sure it will |
| * get flushed before giving the buffer back to hardware. |
| * vlsi_fill_rx() will do this anyway - but here we rely on. |
| */ |
| le16_to_cpus(rd->buf+len); |
| if (irda_calc_crc16(INIT_FCS,rd->buf,len+crclen) != GOOD_FCS) { |
| IRDA_DEBUG(0, "%s: crc error\n", __func__); |
| ret |= VLSI_RX_CRC; |
| goto done; |
| } |
| } |
| |
| if (!rd->skb) { |
| IRDA_WARNING("%s: rx packet lost\n", __func__); |
| ret |= VLSI_RX_DROP; |
| goto done; |
| } |
| |
| skb = rd->skb; |
| rd->skb = NULL; |
| skb->dev = ndev; |
| memcpy(skb_put(skb,len), rd->buf, len); |
| skb_reset_mac_header(skb); |
| if (in_interrupt()) |
| netif_rx(skb); |
| else |
| netif_rx_ni(skb); |
| |
| done: |
| rd_set_status(rd, 0); |
| rd_set_count(rd, 0); |
| /* buffer still owned by CPU */ |
| |
| return (ret) ? -ret : len; |
| } |
| |
| static void vlsi_fill_rx(struct vlsi_ring *r) |
| { |
| struct ring_descr *rd; |
| |
| for (rd = ring_last(r); rd != NULL; rd = ring_put(r)) { |
| if (rd_is_active(rd)) { |
| IRDA_WARNING("%s: driver bug: rx descr race with hw\n", |
| __func__); |
| vlsi_ring_debug(r); |
| break; |
| } |
| if (!rd->skb) { |
| rd->skb = dev_alloc_skb(IRLAP_SKB_ALLOCSIZE); |
| if (rd->skb) { |
| skb_reserve(rd->skb,1); |
| rd->skb->protocol = htons(ETH_P_IRDA); |
| } |
| else |
| break; /* probably not worth logging? */ |
| } |
| /* give dma buffer back to busmaster */ |
| pci_dma_sync_single_for_device(r->pdev, rd_get_addr(rd), r->len, r->dir); |
| rd_activate(rd); |
| } |
| } |
| |
| static void vlsi_rx_interrupt(struct net_device *ndev) |
| { |
| vlsi_irda_dev_t *idev = netdev_priv(ndev); |
| struct vlsi_ring *r = idev->rx_ring; |
| struct ring_descr *rd; |
| int ret; |
| |
| for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) { |
| |
| if (rd_is_active(rd)) |
| break; |
| |
| ret = vlsi_process_rx(r, rd); |
| |
| if (ret < 0) { |
| ret = -ret; |
| ndev->stats.rx_errors++; |
| if (ret & VLSI_RX_DROP) |
| ndev->stats.rx_dropped++; |
| if (ret & VLSI_RX_OVER) |
| ndev->stats.rx_over_errors++; |
| if (ret & VLSI_RX_LENGTH) |
| ndev->stats.rx_length_errors++; |
| if (ret & VLSI_RX_FRAME) |
| ndev->stats.rx_frame_errors++; |
| if (ret & VLSI_RX_CRC) |
| ndev->stats.rx_crc_errors++; |
| } |
| else if (ret > 0) { |
| ndev->stats.rx_packets++; |
| ndev->stats.rx_bytes += ret; |
| } |
| } |
| |
| do_gettimeofday(&idev->last_rx); /* remember "now" for later mtt delay */ |
| |
| vlsi_fill_rx(r); |
| |
| if (ring_first(r) == NULL) { |
| /* we are in big trouble, if this should ever happen */ |
| IRDA_ERROR("%s: rx ring exhausted!\n", __func__); |
| vlsi_ring_debug(r); |
| } |
| else |
| outw(0, ndev->base_addr+VLSI_PIO_PROMPT); |
| } |
| |
| /* caller must have stopped the controller from busmastering */ |
| |
| static void vlsi_unarm_rx(vlsi_irda_dev_t *idev) |
| { |
| struct net_device *ndev = pci_get_drvdata(idev->pdev); |
| struct vlsi_ring *r = idev->rx_ring; |
| struct ring_descr *rd; |
| int ret; |
| |
| for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) { |
| |
| ret = 0; |
| if (rd_is_active(rd)) { |
| rd_set_status(rd, 0); |
| if (rd_get_count(rd)) { |
| IRDA_DEBUG(0, "%s - dropping rx packet\n", __func__); |
| ret = -VLSI_RX_DROP; |
| } |
| rd_set_count(rd, 0); |
| pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir); |
| if (rd->skb) { |
| dev_kfree_skb_any(rd->skb); |
| rd->skb = NULL; |
| } |
| } |
| else |
| ret = vlsi_process_rx(r, rd); |
| |
| if (ret < 0) { |
| ret = -ret; |
| ndev->stats.rx_errors++; |
| if (ret & VLSI_RX_DROP) |
| ndev->stats.rx_dropped++; |
| if (ret & VLSI_RX_OVER) |
| ndev->stats.rx_over_errors++; |
| if (ret & VLSI_RX_LENGTH) |
| ndev->stats.rx_length_errors++; |
| if (ret & VLSI_RX_FRAME) |
| ndev->stats.rx_frame_errors++; |
| if (ret & VLSI_RX_CRC) |
| ndev->stats.rx_crc_errors++; |
| } |
| else if (ret > 0) { |
| ndev->stats.rx_packets++; |
| ndev->stats.rx_bytes += ret; |
| } |
| } |
| } |
| |
| /********************************************************/ |
| |
| static int vlsi_process_tx(struct vlsi_ring *r, struct ring_descr *rd) |
| { |
| u16 status; |
| int len; |
| int ret; |
| |
| pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir); |
| /* dma buffer now owned by the CPU */ |
| status = rd_get_status(rd); |
| if (status & RD_TX_UNDRN) |
| ret = VLSI_TX_FIFO; |
| else |
| ret = 0; |
| rd_set_status(rd, 0); |
| |
| if (rd->skb) { |
| len = rd->skb->len; |
| dev_kfree_skb_any(rd->skb); |
| rd->skb = NULL; |
| } |
| else /* tx-skb already freed? - should never happen */ |
| len = rd_get_count(rd); /* incorrect for SIR! (due to wrapping) */ |
| |
| rd_set_count(rd, 0); |
| /* dma buffer still owned by the CPU */ |
| |
| return (ret) ? -ret : len; |
| } |
| |
| static int vlsi_set_baud(vlsi_irda_dev_t *idev, unsigned iobase) |
| { |
| u16 nphyctl; |
| u16 config; |
| unsigned mode; |
| int ret; |
| int baudrate; |
| int fifocnt; |
| |
| baudrate = idev->new_baud; |
| IRDA_DEBUG(2, "%s: %d -> %d\n", __func__, idev->baud, idev->new_baud); |
| if (baudrate == 4000000) { |
| mode = IFF_FIR; |
| config = IRCFG_FIR; |
| nphyctl = PHYCTL_FIR; |
| } |
| else if (baudrate == 1152000) { |
| mode = IFF_MIR; |
| config = IRCFG_MIR | IRCFG_CRC16; |
| nphyctl = PHYCTL_MIR(clksrc==3); |
| } |
| else { |
| mode = IFF_SIR; |
| config = IRCFG_SIR | IRCFG_SIRFILT | IRCFG_RXANY; |
| switch(baudrate) { |
| default: |
| IRDA_WARNING("%s: undefined baudrate %d - fallback to 9600!\n", |
| __func__, baudrate); |
| baudrate = 9600; |
| /* fallthru */ |
| case 2400: |
| case 9600: |
| case 19200: |
| case 38400: |
| case 57600: |
| case 115200: |
| nphyctl = PHYCTL_SIR(baudrate,sirpulse,clksrc==3); |
| break; |
| } |
| } |
| config |= IRCFG_MSTR | IRCFG_ENRX; |
| |
| fifocnt = inw(iobase+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK; |
| if (fifocnt != 0) { |
| IRDA_DEBUG(0, "%s: rx fifo not empty(%d)\n", __func__, fifocnt); |
| } |
| |
| outw(0, iobase+VLSI_PIO_IRENABLE); |
| outw(config, iobase+VLSI_PIO_IRCFG); |
| outw(nphyctl, iobase+VLSI_PIO_NPHYCTL); |
| wmb(); |
| outw(IRENABLE_PHYANDCLOCK, iobase+VLSI_PIO_IRENABLE); |
| mb(); |
| |
| udelay(1); /* chip applies IRCFG on next rising edge of its 8MHz clock */ |
| |
| /* read back settings for validation */ |
| |
| config = inw(iobase+VLSI_PIO_IRENABLE) & IRENABLE_MASK; |
| |
| if (mode == IFF_FIR) |
| config ^= IRENABLE_FIR_ON; |
| else if (mode == IFF_MIR) |
| config ^= (IRENABLE_MIR_ON|IRENABLE_CRC16_ON); |
| else |
| config ^= IRENABLE_SIR_ON; |
| |
| if (config != (IRENABLE_PHYANDCLOCK|IRENABLE_ENRXST)) { |
| IRDA_WARNING("%s: failed to set %s mode!\n", __func__, |
| (mode==IFF_SIR)?"SIR":((mode==IFF_MIR)?"MIR":"FIR")); |
| ret = -1; |
| } |
| else { |
| if (inw(iobase+VLSI_PIO_PHYCTL) != nphyctl) { |
| IRDA_WARNING("%s: failed to apply baudrate %d\n", |
| __func__, baudrate); |
| ret = -1; |
| } |
| else { |
| idev->mode = mode; |
| idev->baud = baudrate; |
| idev->new_baud = 0; |
| ret = 0; |
| } |
| } |
| |
| if (ret) |
| vlsi_reg_debug(iobase,__func__); |
| |
| return ret; |
| } |
| |
| static netdev_tx_t vlsi_hard_start_xmit(struct sk_buff *skb, |
| struct net_device *ndev) |
| { |
| vlsi_irda_dev_t *idev = netdev_priv(ndev); |
| struct vlsi_ring *r = idev->tx_ring; |
| struct ring_descr *rd; |
| unsigned long flags; |
| unsigned iobase = ndev->base_addr; |
| u8 status; |
| u16 config; |
| int mtt; |
| int len, speed; |
| struct timeval now, ready; |
| char *msg = NULL; |
| |
| speed = irda_get_next_speed(skb); |
| spin_lock_irqsave(&idev->lock, flags); |
| if (speed != -1 && speed != idev->baud) { |
| netif_stop_queue(ndev); |
| idev->new_baud = speed; |
| status = RD_TX_CLRENTX; /* stop tx-ring after this frame */ |
| } |
| else |
| status = 0; |
| |
| if (skb->len == 0) { |
| /* handle zero packets - should be speed change */ |
| if (status == 0) { |
| msg = "bogus zero-length packet"; |
| goto drop_unlock; |
| } |
| |
| /* due to the completely asynch tx operation we might have |
| * IrLAP racing with the hardware here, f.e. if the controller |
| * is just sending the last packet with current speed while |
| * the LAP is already switching the speed using synchronous |
| * len=0 packet. Immediate execution would lead to hw lockup |
| * requiring a powercycle to reset. Good candidate to trigger |
| * this is the final UA:RSP packet after receiving a DISC:CMD |
| * when getting the LAP down. |
| * Note that we are not protected by the queue_stop approach |
| * because the final UA:RSP arrives _without_ request to apply |
| * new-speed-after-this-packet - hence the driver doesn't know |
| * this was the last packet and doesn't stop the queue. So the |
| * forced switch to default speed from LAP gets through as fast |
| * as only some 10 usec later while the UA:RSP is still processed |
| * by the hardware and we would get screwed. |
| */ |
| |
| if (ring_first(idev->tx_ring) == NULL) { |
| /* no race - tx-ring already empty */ |
| vlsi_set_baud(idev, iobase); |
| netif_wake_queue(ndev); |
| } |
| else |
| ; |
| /* keep the speed change pending like it would |
| * for any len>0 packet. tx completion interrupt |
| * will apply it when the tx ring becomes empty. |
| */ |
| spin_unlock_irqrestore(&idev->lock, flags); |
| dev_kfree_skb_any(skb); |
| return NETDEV_TX_OK; |
| } |
| |
| /* sanity checks - simply drop the packet */ |
| |
| rd = ring_last(r); |
| if (!rd) { |
| msg = "ring full, but queue wasn't stopped"; |
| goto drop_unlock; |
| } |
| |
| if (rd_is_active(rd)) { |
| msg = "entry still owned by hw"; |
| goto drop_unlock; |
| } |
| |
| if (!rd->buf) { |
| msg = "tx ring entry without pci buffer"; |
| goto drop_unlock; |
| } |
| |
| if (rd->skb) { |
| msg = "ring entry with old skb still attached"; |
| goto drop_unlock; |
| } |
| |
| /* no need for serialization or interrupt disable during mtt */ |
| spin_unlock_irqrestore(&idev->lock, flags); |
| |
| if ((mtt = irda_get_mtt(skb)) > 0) { |
| |
| ready.tv_usec = idev->last_rx.tv_usec + mtt; |
| ready.tv_sec = idev->last_rx.tv_sec; |
| if (ready.tv_usec >= 1000000) { |
| ready.tv_usec -= 1000000; |
| ready.tv_sec++; /* IrLAP 1.1: mtt always < 1 sec */ |
| } |
| for(;;) { |
| do_gettimeofday(&now); |
| if (now.tv_sec > ready.tv_sec || |
| (now.tv_sec==ready.tv_sec && now.tv_usec>=ready.tv_usec)) |
| break; |
| udelay(100); |
| /* must not sleep here - called under netif_tx_lock! */ |
| } |
| } |
| |
| /* tx buffer already owned by CPU due to pci_dma_sync_single_for_cpu() |
| * after subsequent tx-completion |
| */ |
| |
| if (idev->mode == IFF_SIR) { |
| status |= RD_TX_DISCRC; /* no hw-crc creation */ |
| len = async_wrap_skb(skb, rd->buf, r->len); |
| |
| /* Some rare worst case situation in SIR mode might lead to |
| * potential buffer overflow. The wrapper detects this, returns |
| * with a shortened frame (without FCS/EOF) but doesn't provide |
| * any error indication about the invalid packet which we are |
| * going to transmit. |
| * Therefore we log if the buffer got filled to the point, where the |
| * wrapper would abort, i.e. when there are less than 5 bytes left to |
| * allow appending the FCS/EOF. |
| */ |
| |
| if (len >= r->len-5) |
| IRDA_WARNING("%s: possible buffer overflow with SIR wrapping!\n", |
| __func__); |
| } |
| else { |
| /* hw deals with MIR/FIR mode wrapping */ |
| status |= RD_TX_PULSE; /* send 2 us highspeed indication pulse */ |
| len = skb->len; |
| if (len > r->len) { |
| msg = "frame exceeds tx buffer length"; |
| goto drop; |
| } |
| else |
| skb_copy_from_linear_data(skb, rd->buf, len); |
| } |
| |
| rd->skb = skb; /* remember skb for tx-complete stats */ |
| |
| rd_set_count(rd, len); |
| rd_set_status(rd, status); /* not yet active! */ |
| |
| /* give dma buffer back to busmaster-hw (flush caches to make |
| * CPU-driven changes visible from the pci bus). |
| */ |
| |
| pci_dma_sync_single_for_device(r->pdev, rd_get_addr(rd), r->len, r->dir); |
| |
| /* Switching to TX mode here races with the controller |
| * which may stop TX at any time when fetching an inactive descriptor |
| * or one with CLR_ENTX set. So we switch on TX only, if TX was not running |
| * _after_ the new descriptor was activated on the ring. This ensures |
| * we will either find TX already stopped or we can be sure, there |
| * will be a TX-complete interrupt even if the chip stopped doing |
| * TX just after we found it still running. The ISR will then find |
| * the non-empty ring and restart TX processing. The enclosing |
| * spinlock provides the correct serialization to prevent race with isr. |
| */ |
| |
| spin_lock_irqsave(&idev->lock,flags); |
| |
| rd_activate(rd); |
| |
| if (!(inw(iobase+VLSI_PIO_IRENABLE) & IRENABLE_ENTXST)) { |
| int fifocnt; |
| |
| fifocnt = inw(ndev->base_addr+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK; |
| if (fifocnt != 0) { |
| IRDA_DEBUG(0, "%s: rx fifo not empty(%d)\n", __func__, fifocnt); |
| } |
| |
| config = inw(iobase+VLSI_PIO_IRCFG); |
| mb(); |
| outw(config | IRCFG_ENTX, iobase+VLSI_PIO_IRCFG); |
| wmb(); |
| outw(0, iobase+VLSI_PIO_PROMPT); |
| } |
| |
| if (ring_put(r) == NULL) { |
| netif_stop_queue(ndev); |
| IRDA_DEBUG(3, "%s: tx ring full - queue stopped\n", __func__); |
| } |
| spin_unlock_irqrestore(&idev->lock, flags); |
| |
| return NETDEV_TX_OK; |
| |
| drop_unlock: |
| spin_unlock_irqrestore(&idev->lock, flags); |
| drop: |
| IRDA_WARNING("%s: dropping packet - %s\n", __func__, msg); |
| dev_kfree_skb_any(skb); |
| ndev->stats.tx_errors++; |
| ndev->stats.tx_dropped++; |
| /* Don't even think about returning NET_XMIT_DROP (=1) here! |
| * In fact any retval!=0 causes the packet scheduler to requeue the |
| * packet for later retry of transmission - which isn't exactly |
| * what we want after we've just called dev_kfree_skb_any ;-) |
| */ |
| return NETDEV_TX_OK; |
| } |
| |
| static void vlsi_tx_interrupt(struct net_device *ndev) |
| { |
| vlsi_irda_dev_t *idev = netdev_priv(ndev); |
| struct vlsi_ring *r = idev->tx_ring; |
| struct ring_descr *rd; |
| unsigned iobase; |
| int ret; |
| u16 config; |
| |
| for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) { |
| |
| if (rd_is_active(rd)) |
| break; |
| |
| ret = vlsi_process_tx(r, rd); |
| |
| if (ret < 0) { |
| ret = -ret; |
| ndev->stats.tx_errors++; |
| if (ret & VLSI_TX_DROP) |
| ndev->stats.tx_dropped++; |
| if (ret & VLSI_TX_FIFO) |
| ndev->stats.tx_fifo_errors++; |
| } |
| else if (ret > 0){ |
| ndev->stats.tx_packets++; |
| ndev->stats.tx_bytes += ret; |
| } |
| } |
| |
| iobase = ndev->base_addr; |
| |
| if (idev->new_baud && rd == NULL) /* tx ring empty and speed change pending */ |
| vlsi_set_baud(idev, iobase); |
| |
| config = inw(iobase+VLSI_PIO_IRCFG); |
| if (rd == NULL) /* tx ring empty: re-enable rx */ |
| outw((config & ~IRCFG_ENTX) | IRCFG_ENRX, iobase+VLSI_PIO_IRCFG); |
| |
| else if (!(inw(iobase+VLSI_PIO_IRENABLE) & IRENABLE_ENTXST)) { |
| int fifocnt; |
| |
| fifocnt = inw(iobase+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK; |
| if (fifocnt != 0) { |
| IRDA_DEBUG(0, "%s: rx fifo not empty(%d)\n", |
| __func__, fifocnt); |
| } |
| outw(config | IRCFG_ENTX, iobase+VLSI_PIO_IRCFG); |
| } |
| |
| outw(0, iobase+VLSI_PIO_PROMPT); |
| |
| if (netif_queue_stopped(ndev) && !idev->new_baud) { |
| netif_wake_queue(ndev); |
| IRDA_DEBUG(3, "%s: queue awoken\n", __func__); |
| } |
| } |
| |
| /* caller must have stopped the controller from busmastering */ |
| |
| static void vlsi_unarm_tx(vlsi_irda_dev_t *idev) |
| { |
| struct net_device *ndev = pci_get_drvdata(idev->pdev); |
| struct vlsi_ring *r = idev->tx_ring; |
| struct ring_descr *rd; |
| int ret; |
| |
| for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) { |
| |
| ret = 0; |
| if (rd_is_active(rd)) { |
| rd_set_status(rd, 0); |
| rd_set_count(rd, 0); |
| pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir); |
| if (rd->skb) { |
| dev_kfree_skb_any(rd->skb); |
| rd->skb = NULL; |
| } |
| IRDA_DEBUG(0, "%s - dropping tx packet\n", __func__); |
| ret = -VLSI_TX_DROP; |
| } |
| else |
| ret = vlsi_process_tx(r, rd); |
| |
| if (ret < 0) { |
| ret = -ret; |
| ndev->stats.tx_errors++; |
| if (ret & VLSI_TX_DROP) |
| ndev->stats.tx_dropped++; |
| if (ret & VLSI_TX_FIFO) |
| ndev->stats.tx_fifo_errors++; |
| } |
| else if (ret > 0){ |
| ndev->stats.tx_packets++; |
| ndev->stats.tx_bytes += ret; |
| } |
| } |
| |
| } |
| |
| /********************************************************/ |
| |
| static int vlsi_start_clock(struct pci_dev *pdev) |
| { |
| u8 clkctl, lock; |
| int i, count; |
| |
| if (clksrc < 2) { /* auto or PLL: try PLL */ |
| clkctl = CLKCTL_PD_INV | CLKCTL_CLKSTP; |
| pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl); |
| |
| /* procedure to detect PLL lock synchronisation: |
| * after 0.5 msec initial delay we expect to find 3 PLL lock |
| * indications within 10 msec for successful PLL detection. |
| */ |
| udelay(500); |
| count = 0; |
| for (i = 500; i <= 10000; i += 50) { /* max 10 msec */ |
| pci_read_config_byte(pdev, VLSI_PCI_CLKCTL, &lock); |
| if (lock&CLKCTL_LOCK) { |
| if (++count >= 3) |
| break; |
| } |
| udelay(50); |
| } |
| if (count < 3) { |
| if (clksrc == 1) { /* explicitly asked for PLL hence bail out */ |
| IRDA_ERROR("%s: no PLL or failed to lock!\n", |
| __func__); |
| clkctl = CLKCTL_CLKSTP; |
| pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl); |
| return -1; |
| } |
| else /* was: clksrc=0(auto) */ |
| clksrc = 3; /* fallback to 40MHz XCLK (OB800) */ |
| |
| IRDA_DEBUG(0, "%s: PLL not locked, fallback to clksrc=%d\n", |
| __func__, clksrc); |
| } |
| else |
| clksrc = 1; /* got successful PLL lock */ |
| } |
| |
| if (clksrc != 1) { |
| /* we get here if either no PLL detected in auto-mode or |
| an external clock source was explicitly specified */ |
| |
| clkctl = CLKCTL_EXTCLK | CLKCTL_CLKSTP; |
| if (clksrc == 3) |
| clkctl |= CLKCTL_XCKSEL; |
| pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl); |
| |
| /* no way to test for working XCLK */ |
| } |
| else |
| pci_read_config_byte(pdev, VLSI_PCI_CLKCTL, &clkctl); |
| |
| /* ok, now going to connect the chip with the clock source */ |
| |
| clkctl &= ~CLKCTL_CLKSTP; |
| pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl); |
| |
| return 0; |
| } |
| |
| static void vlsi_stop_clock(struct pci_dev *pdev) |
| { |
| u8 clkctl; |
| |
| /* disconnect chip from clock source */ |
| pci_read_config_byte(pdev, VLSI_PCI_CLKCTL, &clkctl); |
| clkctl |= CLKCTL_CLKSTP; |
| pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl); |
| |
| /* disable all clock sources */ |
| clkctl &= ~(CLKCTL_EXTCLK | CLKCTL_PD_INV); |
| pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl); |
| } |
| |
| /********************************************************/ |
| |
| /* writing all-zero to the VLSI PCI IO register area seems to prevent |
| * some occasional situations where the hardware fails (symptoms are |
| * what appears as stalled tx/rx state machines, i.e. everything ok for |
| * receive or transmit but hw makes no progress or is unable to access |
| * the bus memory locations). |
| * Best place to call this is immediately after/before the internal clock |
| * gets started/stopped. |
| */ |
| |
| static inline void vlsi_clear_regs(unsigned iobase) |
| { |
| unsigned i; |
| const unsigned chip_io_extent = 32; |
| |
| for (i = 0; i < chip_io_extent; i += sizeof(u16)) |
| outw(0, iobase + i); |
| } |
| |
| static int vlsi_init_chip(struct pci_dev *pdev) |
| { |
| struct net_device *ndev = pci_get_drvdata(pdev); |
| vlsi_irda_dev_t *idev = netdev_priv(ndev); |
| unsigned iobase; |
| u16 ptr; |
| |
| /* start the clock and clean the registers */ |
| |
| if (vlsi_start_clock(pdev)) { |
| IRDA_ERROR("%s: no valid clock source\n", __func__); |
| return -1; |
| } |
| iobase = ndev->base_addr; |
| vlsi_clear_regs(iobase); |
| |
| outb(IRINTR_INT_MASK, iobase+VLSI_PIO_IRINTR); /* w/c pending IRQ, disable all INT */ |
| |
| outw(0, iobase+VLSI_PIO_IRENABLE); /* disable IrPHY-interface */ |
| |
| /* disable everything, particularly IRCFG_MSTR - (also resetting the RING_PTR) */ |
| |
| outw(0, iobase+VLSI_PIO_IRCFG); |
| wmb(); |
| |
| outw(MAX_PACKET_LENGTH, iobase+VLSI_PIO_MAXPKT); /* max possible value=0x0fff */ |
| |
| outw(BUS_TO_RINGBASE(idev->busaddr), iobase+VLSI_PIO_RINGBASE); |
| |
| outw(TX_RX_TO_RINGSIZE(idev->tx_ring->size, idev->rx_ring->size), |
| iobase+VLSI_PIO_RINGSIZE); |
| |
| ptr = inw(iobase+VLSI_PIO_RINGPTR); |
| atomic_set(&idev->rx_ring->head, RINGPTR_GET_RX(ptr)); |
| atomic_set(&idev->rx_ring->tail, RINGPTR_GET_RX(ptr)); |
| atomic_set(&idev->tx_ring->head, RINGPTR_GET_TX(ptr)); |
| atomic_set(&idev->tx_ring->tail, RINGPTR_GET_TX(ptr)); |
| |
| vlsi_set_baud(idev, iobase); /* idev->new_baud used as provided by caller */ |
| |
| outb(IRINTR_INT_MASK, iobase+VLSI_PIO_IRINTR); /* just in case - w/c pending IRQ's */ |
| wmb(); |
| |
| /* DO NOT BLINDLY ENABLE IRINTR_ACTEN! |
| * basically every received pulse fires an ACTIVITY-INT |
| * leading to >>1000 INT's per second instead of few 10 |
| */ |
| |
| outb(IRINTR_RPKTEN|IRINTR_TPKTEN, iobase+VLSI_PIO_IRINTR); |
| |
| return 0; |
| } |
| |
| static int vlsi_start_hw(vlsi_irda_dev_t *idev) |
| { |
| struct pci_dev *pdev = idev->pdev; |
| struct net_device *ndev = pci_get_drvdata(pdev); |
| unsigned iobase = ndev->base_addr; |
| u8 byte; |
| |
| /* we don't use the legacy UART, disable its address decoding */ |
| |
| pci_read_config_byte(pdev, VLSI_PCI_IRMISC, &byte); |
| byte &= ~(IRMISC_UARTEN | IRMISC_UARTTST); |
| pci_write_config_byte(pdev, VLSI_PCI_IRMISC, byte); |
| |
| /* enable PCI busmaster access to our 16MB page */ |
| |
| pci_write_config_byte(pdev, VLSI_PCI_MSTRPAGE, MSTRPAGE_VALUE); |
| pci_set_master(pdev); |
| |
| if (vlsi_init_chip(pdev) < 0) { |
| pci_disable_device(pdev); |
| return -1; |
| } |
| |
| vlsi_fill_rx(idev->rx_ring); |
| |
| do_gettimeofday(&idev->last_rx); /* first mtt may start from now on */ |
| |
| outw(0, iobase+VLSI_PIO_PROMPT); /* kick hw state machine */ |
| |
| return 0; |
| } |
| |
| static int vlsi_stop_hw(vlsi_irda_dev_t *idev) |
| { |
| struct pci_dev *pdev = idev->pdev; |
| struct net_device *ndev = pci_get_drvdata(pdev); |
| unsigned iobase = ndev->base_addr; |
| unsigned long flags; |
| |
| spin_lock_irqsave(&idev->lock,flags); |
| outw(0, iobase+VLSI_PIO_IRENABLE); |
| outw(0, iobase+VLSI_PIO_IRCFG); /* disable everything */ |
| |
| /* disable and w/c irqs */ |
| outb(0, iobase+VLSI_PIO_IRINTR); |
| wmb(); |
| outb(IRINTR_INT_MASK, iobase+VLSI_PIO_IRINTR); |
| spin_unlock_irqrestore(&idev->lock,flags); |
| |
| vlsi_unarm_tx(idev); |
| vlsi_unarm_rx(idev); |
| |
| vlsi_clear_regs(iobase); |
| vlsi_stop_clock(pdev); |
| |
| pci_disable_device(pdev); |
| |
| return 0; |
| } |
| |
| /**************************************************************/ |
| |
| static void vlsi_tx_timeout(struct net_device *ndev) |
| { |
| vlsi_irda_dev_t *idev = netdev_priv(ndev); |
| |
| |
| vlsi_reg_debug(ndev->base_addr, __func__); |
| vlsi_ring_debug(idev->tx_ring); |
| |
| if (netif_running(ndev)) |
| netif_stop_queue(ndev); |
| |
| vlsi_stop_hw(idev); |
| |
| /* now simply restart the whole thing */ |
| |
| if (!idev->new_baud) |
| idev->new_baud = idev->baud; /* keep current baudrate */ |
| |
| if (vlsi_start_hw(idev)) |
| IRDA_ERROR("%s: failed to restart hw - %s(%s) unusable!\n", |
| __func__, pci_name(idev->pdev), ndev->name); |
| else |
| netif_start_queue(ndev); |
| } |
| |
| static int vlsi_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd) |
| { |
| vlsi_irda_dev_t *idev = netdev_priv(ndev); |
| struct if_irda_req *irq = (struct if_irda_req *) rq; |
| unsigned long flags; |
| u16 fifocnt; |
| int ret = 0; |
| |
| switch (cmd) { |
| case SIOCSBANDWIDTH: |
| if (!capable(CAP_NET_ADMIN)) { |
| ret = -EPERM; |
| break; |
| } |
| spin_lock_irqsave(&idev->lock, flags); |
| idev->new_baud = irq->ifr_baudrate; |
| /* when called from userland there might be a minor race window here |
| * if the stack tries to change speed concurrently - which would be |
| * pretty strange anyway with the userland having full control... |
| */ |
| vlsi_set_baud(idev, ndev->base_addr); |
| spin_unlock_irqrestore(&idev->lock, flags); |
| break; |
| case SIOCSMEDIABUSY: |
| if (!capable(CAP_NET_ADMIN)) { |
| ret = -EPERM; |
| break; |
| } |
| irda_device_set_media_busy(ndev, TRUE); |
| break; |
| case SIOCGRECEIVING: |
| /* the best we can do: check whether there are any bytes in rx fifo. |
| * The trustable window (in case some data arrives just afterwards) |
| * may be as short as 1usec or so at 4Mbps. |
| */ |
| fifocnt = inw(ndev->base_addr+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK; |
| irq->ifr_receiving = (fifocnt!=0) ? 1 : 0; |
| break; |
| default: |
| IRDA_WARNING("%s: notsupp - cmd=%04x\n", |
| __func__, cmd); |
| ret = -EOPNOTSUPP; |
| } |
| |
| return ret; |
| } |
| |
| /********************************************************/ |
| |
| static irqreturn_t vlsi_interrupt(int irq, void *dev_instance) |
| { |
| struct net_device *ndev = dev_instance; |
| vlsi_irda_dev_t *idev = netdev_priv(ndev); |
| unsigned iobase; |
| u8 irintr; |
| int boguscount = 5; |
| unsigned long flags; |
| int handled = 0; |
| |
| iobase = ndev->base_addr; |
| spin_lock_irqsave(&idev->lock,flags); |
| do { |
| irintr = inb(iobase+VLSI_PIO_IRINTR); |
| mb(); |
| outb(irintr, iobase+VLSI_PIO_IRINTR); /* acknowledge asap */ |
| |
| if (!(irintr&=IRINTR_INT_MASK)) /* not our INT - probably shared */ |
| break; |
| |
| handled = 1; |
| |
| if (unlikely(!(irintr & ~IRINTR_ACTIVITY))) |
| break; /* nothing todo if only activity */ |
| |
| if (irintr&IRINTR_RPKTINT) |
| vlsi_rx_interrupt(ndev); |
| |
| if (irintr&IRINTR_TPKTINT) |
| vlsi_tx_interrupt(ndev); |
| |
| } while (--boguscount > 0); |
| spin_unlock_irqrestore(&idev->lock,flags); |
| |
| if (boguscount <= 0) |
| IRDA_MESSAGE("%s: too much work in interrupt!\n", |
| __func__); |
| return IRQ_RETVAL(handled); |
| } |
| |
| /********************************************************/ |
| |
| static int vlsi_open(struct net_device *ndev) |
| { |
| vlsi_irda_dev_t *idev = netdev_priv(ndev); |
| int err = -EAGAIN; |
| char hwname[32]; |
| |
| if (pci_request_regions(idev->pdev, drivername)) { |
| IRDA_WARNING("%s: io resource busy\n", __func__); |
| goto errout; |
| } |
| ndev->base_addr = pci_resource_start(idev->pdev,0); |
| ndev->irq = idev->pdev->irq; |
| |
| /* under some rare occasions the chip apparently comes up with |
| * IRQ's pending. We better w/c pending IRQ and disable them all |
| */ |
| |
| outb(IRINTR_INT_MASK, ndev->base_addr+VLSI_PIO_IRINTR); |
| |
| if (request_irq(ndev->irq, vlsi_interrupt, IRQF_SHARED, |
| drivername, ndev)) { |
| IRDA_WARNING("%s: couldn't get IRQ: %d\n", |
| __func__, ndev->irq); |
| goto errout_io; |
| } |
| |
| if ((err = vlsi_create_hwif(idev)) != 0) |
| goto errout_irq; |
| |
| sprintf(hwname, "VLSI-FIR @ 0x%04x", (unsigned)ndev->base_addr); |
| idev->irlap = irlap_open(ndev,&idev->qos,hwname); |
| if (!idev->irlap) |
| goto errout_free_ring; |
| |
| do_gettimeofday(&idev->last_rx); /* first mtt may start from now on */ |
| |
| idev->new_baud = 9600; /* start with IrPHY using 9600(SIR) mode */ |
| |
| if ((err = vlsi_start_hw(idev)) != 0) |
| goto errout_close_irlap; |
| |
| netif_start_queue(ndev); |
| |
| IRDA_MESSAGE("%s: device %s operational\n", __func__, ndev->name); |
| |
| return 0; |
| |
| errout_close_irlap: |
| irlap_close(idev->irlap); |
| errout_free_ring: |
| vlsi_destroy_hwif(idev); |
| errout_irq: |
| free_irq(ndev->irq,ndev); |
| errout_io: |
| pci_release_regions(idev->pdev); |
| errout: |
| return err; |
| } |
| |
| static int vlsi_close(struct net_device *ndev) |
| { |
| vlsi_irda_dev_t *idev = netdev_priv(ndev); |
| |
| netif_stop_queue(ndev); |
| |
| if (idev->irlap) |
| irlap_close(idev->irlap); |
| idev->irlap = NULL; |
| |
| vlsi_stop_hw(idev); |
| |
| vlsi_destroy_hwif(idev); |
| |
| free_irq(ndev->irq,ndev); |
| |
| pci_release_regions(idev->pdev); |
| |
| IRDA_MESSAGE("%s: device %s stopped\n", __func__, ndev->name); |
| |
| return 0; |
| } |
| |
| static const struct net_device_ops vlsi_netdev_ops = { |
| .ndo_open = vlsi_open, |
| .ndo_stop = vlsi_close, |
| .ndo_start_xmit = vlsi_hard_start_xmit, |
| .ndo_do_ioctl = vlsi_ioctl, |
| .ndo_tx_timeout = vlsi_tx_timeout, |
| }; |
| |
| static int vlsi_irda_init(struct net_device *ndev) |
| { |
| vlsi_irda_dev_t *idev = netdev_priv(ndev); |
| struct pci_dev *pdev = idev->pdev; |
| |
| ndev->irq = pdev->irq; |
| ndev->base_addr = pci_resource_start(pdev,0); |
| |
| /* PCI busmastering |
| * see include file for details why we need these 2 masks, in this order! |
| */ |
| |
| if (pci_set_dma_mask(pdev,DMA_MASK_USED_BY_HW) || |
| pci_set_dma_mask(pdev,DMA_MASK_MSTRPAGE)) { |
| IRDA_ERROR("%s: aborting due to PCI BM-DMA address limitations\n", __func__); |
| return -1; |
| } |
| |
| irda_init_max_qos_capabilies(&idev->qos); |
| |
| /* the VLSI82C147 does not support 576000! */ |
| |
| idev->qos.baud_rate.bits = IR_2400 | IR_9600 |
| | IR_19200 | IR_38400 | IR_57600 | IR_115200 |
| | IR_1152000 | (IR_4000000 << 8); |
| |
| idev->qos.min_turn_time.bits = qos_mtt_bits; |
| |
| irda_qos_bits_to_value(&idev->qos); |
| |
| /* currently no public media definitions for IrDA */ |
| |
| ndev->flags |= IFF_PORTSEL | IFF_AUTOMEDIA; |
| ndev->if_port = IF_PORT_UNKNOWN; |
| |
| ndev->netdev_ops = &vlsi_netdev_ops; |
| ndev->watchdog_timeo = 500*HZ/1000; /* max. allowed turn time for IrLAP */ |
| |
| SET_NETDEV_DEV(ndev, &pdev->dev); |
| |
| return 0; |
| } |
| |
| /**************************************************************/ |
| |
| static int |
| vlsi_irda_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
| { |
| struct net_device *ndev; |
| vlsi_irda_dev_t *idev; |
| |
| if (pci_enable_device(pdev)) |
| goto out; |
| else |
| pdev->current_state = 0; /* hw must be running now */ |
| |
| IRDA_MESSAGE("%s: IrDA PCI controller %s detected\n", |
| drivername, pci_name(pdev)); |
| |
| if ( !pci_resource_start(pdev,0) || |
| !(pci_resource_flags(pdev,0) & IORESOURCE_IO) ) { |
| IRDA_ERROR("%s: bar 0 invalid", __func__); |
| goto out_disable; |
| } |
| |
| ndev = alloc_irdadev(sizeof(*idev)); |
| if (ndev==NULL) { |
| IRDA_ERROR("%s: Unable to allocate device memory.\n", |
| __func__); |
| goto out_disable; |
| } |
| |
| idev = netdev_priv(ndev); |
| |
| spin_lock_init(&idev->lock); |
| mutex_init(&idev->mtx); |
| mutex_lock(&idev->mtx); |
| idev->pdev = pdev; |
| |
| if (vlsi_irda_init(ndev) < 0) |
| goto out_freedev; |
| |
| if (register_netdev(ndev) < 0) { |
| IRDA_ERROR("%s: register_netdev failed\n", __func__); |
| goto out_freedev; |
| } |
| |
| if (vlsi_proc_root != NULL) { |
| struct proc_dir_entry *ent; |
| |
| ent = proc_create_data(ndev->name, S_IFREG|S_IRUGO, |
| vlsi_proc_root, VLSI_PROC_FOPS, ndev); |
| if (!ent) { |
| IRDA_WARNING("%s: failed to create proc entry\n", |
| __func__); |
| } else { |
| proc_set_size(ent, 0); |
| } |
| idev->proc_entry = ent; |
| } |
| IRDA_MESSAGE("%s: registered device %s\n", drivername, ndev->name); |
| |
| pci_set_drvdata(pdev, ndev); |
| mutex_unlock(&idev->mtx); |
| |
| return 0; |
| |
| out_freedev: |
| mutex_unlock(&idev->mtx); |
| free_netdev(ndev); |
| out_disable: |
| pci_disable_device(pdev); |
| out: |
| return -ENODEV; |
| } |
| |
| static void vlsi_irda_remove(struct pci_dev *pdev) |
| { |
| struct net_device *ndev = pci_get_drvdata(pdev); |
| vlsi_irda_dev_t *idev; |
| |
| if (!ndev) { |
| IRDA_ERROR("%s: lost netdevice?\n", drivername); |
| return; |
| } |
| |
| unregister_netdev(ndev); |
| |
| idev = netdev_priv(ndev); |
| mutex_lock(&idev->mtx); |
| if (idev->proc_entry) { |
| remove_proc_entry(ndev->name, vlsi_proc_root); |
| idev->proc_entry = NULL; |
| } |
| mutex_unlock(&idev->mtx); |
| |
| free_netdev(ndev); |
| |
| IRDA_MESSAGE("%s: %s removed\n", drivername, pci_name(pdev)); |
| } |
| |
| #ifdef CONFIG_PM |
| |
| /* The Controller doesn't provide PCI PM capabilities as defined by PCI specs. |
| * Some of the Linux PCI-PM code however depends on this, for example in |
| * pci_set_power_state(). So we have to take care to perform the required |
| * operations on our own (particularly reflecting the pdev->current_state) |
| * otherwise we might get cheated by pci-pm. |
| */ |
| |
| |
| static int vlsi_irda_suspend(struct pci_dev *pdev, pm_message_t state) |
| { |
| struct net_device *ndev = pci_get_drvdata(pdev); |
| vlsi_irda_dev_t *idev; |
| |
| if (!ndev) { |
| IRDA_ERROR("%s - %s: no netdevice\n", |
| __func__, pci_name(pdev)); |
| return 0; |
| } |
| idev = netdev_priv(ndev); |
| mutex_lock(&idev->mtx); |
| if (pdev->current_state != 0) { /* already suspended */ |
| if (state.event > pdev->current_state) { /* simply go deeper */ |
| pci_set_power_state(pdev, pci_choose_state(pdev, state)); |
| pdev->current_state = state.event; |
| } |
| else |
| IRDA_ERROR("%s - %s: invalid suspend request %u -> %u\n", __func__, pci_name(pdev), pdev->current_state, state.event); |
| mutex_unlock(&idev->mtx); |
| return 0; |
| } |
| |
| if (netif_running(ndev)) { |
| netif_device_detach(ndev); |
| vlsi_stop_hw(idev); |
| pci_save_state(pdev); |
| if (!idev->new_baud) |
| /* remember speed settings to restore on resume */ |
| idev->new_baud = idev->baud; |
| } |
| |
| pci_set_power_state(pdev, pci_choose_state(pdev, state)); |
| pdev->current_state = state.event; |
| idev->resume_ok = 1; |
| mutex_unlock(&idev->mtx); |
| return 0; |
| } |
| |
| static int vlsi_irda_resume(struct pci_dev *pdev) |
| { |
| struct net_device *ndev = pci_get_drvdata(pdev); |
| vlsi_irda_dev_t *idev; |
| |
| if (!ndev) { |
| IRDA_ERROR("%s - %s: no netdevice\n", |
| __func__, pci_name(pdev)); |
| return 0; |
| } |
| idev = netdev_priv(ndev); |
| mutex_lock(&idev->mtx); |
| if (pdev->current_state == 0) { |
| mutex_unlock(&idev->mtx); |
| IRDA_WARNING("%s - %s: already resumed\n", |
| __func__, pci_name(pdev)); |
| return 0; |
| } |
| |
| pci_set_power_state(pdev, PCI_D0); |
| pdev->current_state = PM_EVENT_ON; |
| |
| if (!idev->resume_ok) { |
| /* should be obsolete now - but used to happen due to: |
| * - pci layer initially setting pdev->current_state = 4 (unknown) |
| * - pci layer did not walk the save_state-tree (might be APM problem) |
| * so we could not refuse to suspend from undefined state |
| * - vlsi_irda_suspend detected invalid state and refused to save |
| * configuration for resume - but was too late to stop suspending |
| * - vlsi_irda_resume got screwed when trying to resume from garbage |
| * |
| * now we explicitly set pdev->current_state = 0 after enabling the |
| * device and independently resume_ok should catch any garbage config. |
| */ |
| IRDA_WARNING("%s - hm, nothing to resume?\n", __func__); |
| mutex_unlock(&idev->mtx); |
| return 0; |
| } |
| |
| if (netif_running(ndev)) { |
| pci_restore_state(pdev); |
| vlsi_start_hw(idev); |
| netif_device_attach(ndev); |
| } |
| idev->resume_ok = 0; |
| mutex_unlock(&idev->mtx); |
| return 0; |
| } |
| |
| #endif /* CONFIG_PM */ |
| |
| /*********************************************************/ |
| |
| static struct pci_driver vlsi_irda_driver = { |
| .name = drivername, |
| .id_table = vlsi_irda_table, |
| .probe = vlsi_irda_probe, |
| .remove = vlsi_irda_remove, |
| #ifdef CONFIG_PM |
| .suspend = vlsi_irda_suspend, |
| .resume = vlsi_irda_resume, |
| #endif |
| }; |
| |
| #define PROC_DIR ("driver/" DRIVER_NAME) |
| |
| static int __init vlsi_mod_init(void) |
| { |
| int i, ret; |
| |
| if (clksrc < 0 || clksrc > 3) { |
| IRDA_ERROR("%s: invalid clksrc=%d\n", drivername, clksrc); |
| return -1; |
| } |
| |
| for (i = 0; i < 2; i++) { |
| switch(ringsize[i]) { |
| case 4: |
| case 8: |
| case 16: |
| case 32: |
| case 64: |
| break; |
| default: |
| IRDA_WARNING("%s: invalid %s ringsize %d, using default=8", drivername, (i)?"rx":"tx", ringsize[i]); |
| ringsize[i] = 8; |
| break; |
| } |
| } |
| |
| sirpulse = !!sirpulse; |
| |
| /* proc_mkdir returns NULL if !CONFIG_PROC_FS. |
| * Failure to create the procfs entry is handled like running |
| * without procfs - it's not required for the driver to work. |
| */ |
| vlsi_proc_root = proc_mkdir(PROC_DIR, NULL); |
| |
| ret = pci_register_driver(&vlsi_irda_driver); |
| |
| if (ret && vlsi_proc_root) |
| remove_proc_entry(PROC_DIR, NULL); |
| return ret; |
| |
| } |
| |
| static void __exit vlsi_mod_exit(void) |
| { |
| pci_unregister_driver(&vlsi_irda_driver); |
| if (vlsi_proc_root) |
| remove_proc_entry(PROC_DIR, NULL); |
| } |
| |
| module_init(vlsi_mod_init); |
| module_exit(vlsi_mod_exit); |