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marcus.erl |
/*********************************************************************
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*
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* vlsi_ir.c: VLSI82C147 PCI IrDA controller driver for Linux
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*
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* Copyright (c) 2001-2003 Martin Diehl
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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********************************************************************/
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#include <linux/module.h>
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#define DRIVER_NAME "vlsi_ir"
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#define DRIVER_VERSION "v0.5"
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#define DRIVER_DESCRIPTION "IrDA SIR/MIR/FIR driver for VLSI 82C147"
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#define DRIVER_AUTHOR "Martin Diehl <info@mdiehl.de>"
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MODULE_DESCRIPTION(DRIVER_DESCRIPTION);
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MODULE_AUTHOR(DRIVER_AUTHOR);
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MODULE_LICENSE("GPL");
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/********************************************************/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/pci.h>
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#include <linux/slab.h>
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#include <linux/netdevice.h>
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#include <linux/skbuff.h>
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#include <linux/delay.h>
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#include <linux/time.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/mutex.h>
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#include <asm/uaccess.h>
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#include <asm/byteorder.h>
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#include <net/irda/irda.h>
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#include <net/irda/irda_device.h>
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#include <net/irda/wrapper.h>
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#include <net/irda/crc.h>
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#include "vlsi_ir.h"
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/********************************************************/
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static /* const */ char drivername[] = DRIVER_NAME;
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static struct pci_device_id vlsi_irda_table [] = {
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{
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.class = PCI_CLASS_WIRELESS_IRDA << 8,
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.class_mask = PCI_CLASS_SUBCLASS_MASK << 8,
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.vendor = PCI_VENDOR_ID_VLSI,
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.device = PCI_DEVICE_ID_VLSI_82C147,
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.subvendor = PCI_ANY_ID,
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.subdevice = PCI_ANY_ID,
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},
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{ /* all zeroes */ }
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};
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MODULE_DEVICE_TABLE(pci, vlsi_irda_table);
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/********************************************************/
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/* clksrc: which clock source to be used
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* 0: auto - try PLL, fallback to 40MHz XCLK
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* 1: on-chip 48MHz PLL
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* 2: external 48MHz XCLK
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* 3: external 40MHz XCLK (HP OB-800)
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*/
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static int clksrc = 0; /* default is 0(auto) */
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module_param(clksrc, int, 0);
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MODULE_PARM_DESC(clksrc, "clock input source selection");
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/* ringsize: size of the tx and rx descriptor rings
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* independent for tx and rx
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* specify as ringsize=tx[,rx]
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* allowed values: 4, 8, 16, 32, 64
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* Due to the IrDA 1.x max. allowed window size=7,
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* there should be no gain when using rings larger than 8
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*/
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static int ringsize[] = {8,8}; /* default is tx=8 / rx=8 */
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module_param_array(ringsize, int, NULL, 0);
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MODULE_PARM_DESC(ringsize, "TX, RX ring descriptor size");
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/* sirpulse: tuning of the SIR pulse width within IrPHY 1.3 limits
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* 0: very short, 1.5us (exception: 6us at 2.4 kbaud)
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* 1: nominal 3/16 bittime width
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* note: IrDA compliant peer devices should be happy regardless
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* which one is used. Primary goal is to save some power
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* on the sender's side - at 9.6kbaud for example the short
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* pulse width saves more than 90% of the transmitted IR power.
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*/
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static int sirpulse = 1; /* default is 3/16 bittime */
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module_param(sirpulse, int, 0);
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MODULE_PARM_DESC(sirpulse, "SIR pulse width tuning");
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/* qos_mtt_bits: encoded min-turn-time value we require the peer device
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* to use before transmitting to us. "Type 1" (per-station)
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* bitfield according to IrLAP definition (section 6.6.8)
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* Don't know which transceiver is used by my OB800 - the
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* pretty common HP HDLS-1100 requires 1 msec - so lets use this.
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*/
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static int qos_mtt_bits = 0x07; /* default is 1 ms or more */
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module_param(qos_mtt_bits, int, 0);
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MODULE_PARM_DESC(qos_mtt_bits, "IrLAP bitfield representing min-turn-time");
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/********************************************************/
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static void vlsi_reg_debug(unsigned iobase, const char *s)
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{
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int i;
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printk(KERN_DEBUG "%s: ", s);
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for (i = 0; i < 0x20; i++)
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printk("%02x", (unsigned)inb((iobase+i)));
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printk("\n");
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}
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static void vlsi_ring_debug(struct vlsi_ring *r)
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{
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struct ring_descr *rd;
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unsigned i;
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printk(KERN_DEBUG "%s - ring %p / size %u / mask 0x%04x / len %u / dir %d / hw %p\n",
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__FUNCTION__, r, r->size, r->mask, r->len, r->dir, r->rd[0].hw);
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printk(KERN_DEBUG "%s - head = %d / tail = %d\n", __FUNCTION__,
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atomic_read(&r->head) & r->mask, atomic_read(&r->tail) & r->mask);
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for (i = 0; i < r->size; i++) {
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rd = &r->rd[i];
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printk(KERN_DEBUG "%s - ring descr %u: ", __FUNCTION__, i);
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printk("skb=%p data=%p hw=%p\n", rd->skb, rd->buf, rd->hw);
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printk(KERN_DEBUG "%s - hw: status=%02x count=%u addr=0x%08x\n",
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__FUNCTION__, (unsigned) rd_get_status(rd),
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(unsigned) rd_get_count(rd), (unsigned) rd_get_addr(rd));
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}
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}
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/********************************************************/
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/* needed regardless of CONFIG_PROC_FS */
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static struct proc_dir_entry *vlsi_proc_root = NULL;
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#ifdef CONFIG_PROC_FS
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static void vlsi_proc_pdev(struct seq_file *seq, struct pci_dev *pdev)
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{
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unsigned iobase = pci_resource_start(pdev, 0);
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unsigned i;
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seq_printf(seq, "\n%s (vid/did: %04x/%04x)\n",
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pci_name(pdev), (int)pdev->vendor, (int)pdev->device);
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seq_printf(seq, "pci-power-state: %u\n", (unsigned) pdev->current_state);
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seq_printf(seq, "resources: irq=%u / io=0x%04x / dma_mask=0x%016Lx\n",
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pdev->irq, (unsigned)pci_resource_start(pdev, 0), (unsigned long long)pdev->dma_mask);
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seq_printf(seq, "hw registers: ");
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for (i = 0; i < 0x20; i++)
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seq_printf(seq, "%02x", (unsigned)inb((iobase+i)));
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seq_printf(seq, "\n");
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}
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static void vlsi_proc_ndev(struct seq_file *seq, struct net_device *ndev)
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{
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vlsi_irda_dev_t *idev = ndev->priv;
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u8 byte;
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u16 word;
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unsigned delta1, delta2;
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struct timeval now;
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unsigned iobase = ndev->base_addr;
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seq_printf(seq, "\n%s link state: %s / %s / %s / %s\n", ndev->name,
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netif_device_present(ndev) ? "attached" : "detached",
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netif_running(ndev) ? "running" : "not running",
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netif_carrier_ok(ndev) ? "carrier ok" : "no carrier",
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netif_queue_stopped(ndev) ? "queue stopped" : "queue running");
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if (!netif_running(ndev))
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return;
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seq_printf(seq, "\nhw-state:\n");
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pci_read_config_byte(idev->pdev, VLSI_PCI_IRMISC, &byte);
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seq_printf(seq, "IRMISC:%s%s%s uart%s",
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(byte&IRMISC_IRRAIL) ? " irrail" : "",
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(byte&IRMISC_IRPD) ? " irpd" : "",
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(byte&IRMISC_UARTTST) ? " uarttest" : "",
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(byte&IRMISC_UARTEN) ? "@" : " disabled\n");
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if (byte&IRMISC_UARTEN) {
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seq_printf(seq, "0x%s\n",
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(byte&2) ? ((byte&1) ? "3e8" : "2e8")
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: ((byte&1) ? "3f8" : "2f8"));
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}
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pci_read_config_byte(idev->pdev, VLSI_PCI_CLKCTL, &byte);
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seq_printf(seq, "CLKCTL: PLL %s%s%s / clock %s / wakeup %s\n",
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(byte&CLKCTL_PD_INV) ? "powered" : "down",
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(byte&CLKCTL_LOCK) ? " locked" : "",
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(byte&CLKCTL_EXTCLK) ? ((byte&CLKCTL_XCKSEL)?" / 40 MHz XCLK":" / 48 MHz XCLK") : "",
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(byte&CLKCTL_CLKSTP) ? "stopped" : "running",
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(byte&CLKCTL_WAKE) ? "enabled" : "disabled");
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pci_read_config_byte(idev->pdev, VLSI_PCI_MSTRPAGE, &byte);
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seq_printf(seq, "MSTRPAGE: 0x%02x\n", (unsigned)byte);
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byte = inb(iobase+VLSI_PIO_IRINTR);
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seq_printf(seq, "IRINTR:%s%s%s%s%s%s%s%s\n",
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(byte&IRINTR_ACTEN) ? " ACTEN" : "",
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(byte&IRINTR_RPKTEN) ? " RPKTEN" : "",
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(byte&IRINTR_TPKTEN) ? " TPKTEN" : "",
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(byte&IRINTR_OE_EN) ? " OE_EN" : "",
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(byte&IRINTR_ACTIVITY) ? " ACTIVITY" : "",
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(byte&IRINTR_RPKTINT) ? " RPKTINT" : "",
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(byte&IRINTR_TPKTINT) ? " TPKTINT" : "",
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(byte&IRINTR_OE_INT) ? " OE_INT" : "");
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word = inw(iobase+VLSI_PIO_RINGPTR);
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seq_printf(seq, "RINGPTR: rx=%u / tx=%u\n", RINGPTR_GET_RX(word), RINGPTR_GET_TX(word));
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word = inw(iobase+VLSI_PIO_RINGBASE);
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seq_printf(seq, "RINGBASE: busmap=0x%08x\n",
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((unsigned)word << 10)|(MSTRPAGE_VALUE<<24));
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word = inw(iobase+VLSI_PIO_RINGSIZE);
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seq_printf(seq, "RINGSIZE: rx=%u / tx=%u\n", RINGSIZE_TO_RXSIZE(word),
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RINGSIZE_TO_TXSIZE(word));
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| 238 |
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word = inw(iobase+VLSI_PIO_IRCFG);
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seq_printf(seq, "IRCFG:%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
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| 240 |
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(word&IRCFG_LOOP) ? " LOOP" : "",
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| 241 |
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(word&IRCFG_ENTX) ? " ENTX" : "",
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| 242 |
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(word&IRCFG_ENRX) ? " ENRX" : "",
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| 243 |
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(word&IRCFG_MSTR) ? " MSTR" : "",
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| 244 |
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(word&IRCFG_RXANY) ? " RXANY" : "",
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| 245 |
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(word&IRCFG_CRC16) ? " CRC16" : "",
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| 246 |
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(word&IRCFG_FIR) ? " FIR" : "",
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| 247 |
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(word&IRCFG_MIR) ? " MIR" : "",
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| 248 |
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(word&IRCFG_SIR) ? " SIR" : "",
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| 249 |
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(word&IRCFG_SIRFILT) ? " SIRFILT" : "",
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| 250 |
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(word&IRCFG_SIRTEST) ? " SIRTEST" : "",
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| 251 |
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(word&IRCFG_TXPOL) ? " TXPOL" : "",
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| 252 |
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(word&IRCFG_RXPOL) ? " RXPOL" : "");
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| 253 |
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word = inw(iobase+VLSI_PIO_IRENABLE);
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| 254 |
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seq_printf(seq, "IRENABLE:%s%s%s%s%s%s%s%s\n",
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| 255 |
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(word&IRENABLE_PHYANDCLOCK) ? " PHYANDCLOCK" : "",
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| 256 |
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(word&IRENABLE_CFGER) ? " CFGERR" : "",
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| 257 |
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(word&IRENABLE_FIR_ON) ? " FIR_ON" : "",
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| 258 |
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(word&IRENABLE_MIR_ON) ? " MIR_ON" : "",
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| 259 |
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(word&IRENABLE_SIR_ON) ? " SIR_ON" : "",
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| 260 |
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(word&IRENABLE_ENTXST) ? " ENTXST" : "",
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| 261 |
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(word&IRENABLE_ENRXST) ? " ENRXST" : "",
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| 262 |
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(word&IRENABLE_CRC16_ON) ? " CRC16_ON" : "");
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| 263 |
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word = inw(iobase+VLSI_PIO_PHYCTL);
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| 264 |
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seq_printf(seq, "PHYCTL: baud-divisor=%u / pulsewidth=%u / preamble=%u\n",
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| 265 |
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(unsigned)PHYCTL_TO_BAUD(word),
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| 266 |
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(unsigned)PHYCTL_TO_PLSWID(word),
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| 267 |
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(unsigned)PHYCTL_TO_PREAMB(word));
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| 268 |
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word = inw(iobase+VLSI_PIO_NPHYCTL);
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| 269 |
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seq_printf(seq, "NPHYCTL: baud-divisor=%u / pulsewidth=%u / preamble=%u\n",
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| 270 |
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(unsigned)PHYCTL_TO_BAUD(word),
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| 271 |
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(unsigned)PHYCTL_TO_PLSWID(word),
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| 272 |
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(unsigned)PHYCTL_TO_PREAMB(word));
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| 273 |
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word = inw(iobase+VLSI_PIO_MAXPKT);
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| 274 |
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seq_printf(seq, "MAXPKT: max. rx packet size = %u\n", word);
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| 275 |
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word = inw(iobase+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK;
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| 276 |
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seq_printf(seq, "RCVBCNT: rx-fifo filling level = %u\n", word);
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| 277 |
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| 278 |
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seq_printf(seq, "\nsw-state:\n");
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| 279 |
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seq_printf(seq, "IrPHY setup: %d baud - %s encoding\n", idev->baud,
|
| 280 |
|
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(idev->mode==IFF_SIR)?"SIR":((idev->mode==IFF_MIR)?"MIR":"FIR"));
|
| 281 |
|
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do_gettimeofday(&now);
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| 282 |
|
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if (now.tv_usec >= idev->last_rx.tv_usec) {
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| 283 |
|
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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",
|
| 294 |
|
|
idev->stats.rx_packets, idev->stats.rx_bytes, idev->stats.rx_errors,
|
| 295 |
|
|
idev->stats.rx_dropped);
|
| 296 |
|
|
seq_printf(seq, " / overrun=%lu / length=%lu / frame=%lu / crc=%lu\n",
|
| 297 |
|
|
idev->stats.rx_over_errors, idev->stats.rx_length_errors,
|
| 298 |
|
|
idev->stats.rx_frame_errors, idev->stats.rx_crc_errors);
|
| 299 |
|
|
seq_printf(seq, "TX: packets=%lu / bytes=%lu / errors=%lu / dropped=%lu / fifo=%lu\n",
|
| 300 |
|
|
idev->stats.tx_packets, idev->stats.tx_bytes, idev->stats.tx_errors,
|
| 301 |
|
|
idev->stats.tx_dropped, idev->stats.tx_fifo_errors);
|
| 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;
|
| 349 |
|
|
vlsi_irda_dev_t *idev = ndev->priv;
|
| 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 |
|
|
|
| 388 |
|
|
static const struct file_operations vlsi_proc_fops = {
|
| 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",
|
| 438 |
|
|
__FUNCTION__, rd->buf);
|
| 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);
|
| 475 |
|
|
kfree(rd->buf);
|
| 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",
|
| 492 |
|
|
__FUNCTION__);
|
| 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);
|
| 546 |
|
|
vlsi_irda_dev_t *idev = ndev->priv;
|
| 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) {
|
| 567 |
|
|
IRDA_DEBUG(0, "%s: strange frame (len=%d)\n", __FUNCTION__, len);
|
| 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) {
|
| 582 |
|
|
IRDA_DEBUG(0, "%s: crc error\n", __FUNCTION__);
|
| 583 |
|
|
ret |= VLSI_RX_CRC;
|
| 584 |
|
|
goto done;
|
| 585 |
|
|
}
|
| 586 |
|
|
}
|
| 587 |
|
|
|
| 588 |
|
|
if (!rd->skb) {
|
| 589 |
|
|
IRDA_WARNING("%s: rx packet lost\n", __FUNCTION__);
|
| 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);
|
| 598 |
|
|
skb_reset_mac_header(skb);
|
| 599 |
|
|
if (in_interrupt())
|
| 600 |
|
|
netif_rx(skb);
|
| 601 |
|
|
else
|
| 602 |
|
|
netif_rx_ni(skb);
|
| 603 |
|
|
ndev->last_rx = jiffies;
|
| 604 |
|
|
|
| 605 |
|
|
done:
|
| 606 |
|
|
rd_set_status(rd, 0);
|
| 607 |
|
|
rd_set_count(rd, 0);
|
| 608 |
|
|
/* buffer still owned by CPU */
|
| 609 |
|
|
|
| 610 |
|
|
return (ret) ? -ret : len;
|
| 611 |
|
|
}
|
| 612 |
|
|
|
| 613 |
|
|
static void vlsi_fill_rx(struct vlsi_ring *r)
|
| 614 |
|
|
{
|
| 615 |
|
|
struct ring_descr *rd;
|
| 616 |
|
|
|
| 617 |
|
|
for (rd = ring_last(r); rd != NULL; rd = ring_put(r)) {
|
| 618 |
|
|
if (rd_is_active(rd)) {
|
| 619 |
|
|
IRDA_WARNING("%s: driver bug: rx descr race with hw\n",
|
| 620 |
|
|
__FUNCTION__);
|
| 621 |
|
|
vlsi_ring_debug(r);
|
| 622 |
|
|
break;
|
| 623 |
|
|
}
|
| 624 |
|
|
if (!rd->skb) {
|
| 625 |
|
|
rd->skb = dev_alloc_skb(IRLAP_SKB_ALLOCSIZE);
|
| 626 |
|
|
if (rd->skb) {
|
| 627 |
|
|
skb_reserve(rd->skb,1);
|
| 628 |
|
|
rd->skb->protocol = htons(ETH_P_IRDA);
|
| 629 |
|
|
}
|
| 630 |
|
|
else
|
| 631 |
|
|
break; /* probably not worth logging? */
|
| 632 |
|
|
}
|
| 633 |
|
|
/* give dma buffer back to busmaster */
|
| 634 |
|
|
pci_dma_sync_single_for_device(r->pdev, rd_get_addr(rd), r->len, r->dir);
|
| 635 |
|
|
rd_activate(rd);
|
| 636 |
|
|
}
|
| 637 |
|
|
}
|
| 638 |
|
|
|
| 639 |
|
|
static void vlsi_rx_interrupt(struct net_device *ndev)
|
| 640 |
|
|
{
|
| 641 |
|
|
vlsi_irda_dev_t *idev = ndev->priv;
|
| 642 |
|
|
struct vlsi_ring *r = idev->rx_ring;
|
| 643 |
|
|
struct ring_descr *rd;
|
| 644 |
|
|
int ret;
|
| 645 |
|
|
|
| 646 |
|
|
for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) {
|
| 647 |
|
|
|
| 648 |
|
|
if (rd_is_active(rd))
|
| 649 |
|
|
break;
|
| 650 |
|
|
|
| 651 |
|
|
ret = vlsi_process_rx(r, rd);
|
| 652 |
|
|
|
| 653 |
|
|
if (ret < 0) {
|
| 654 |
|
|
ret = -ret;
|
| 655 |
|
|
idev->stats.rx_errors++;
|
| 656 |
|
|
if (ret & VLSI_RX_DROP)
|
| 657 |
|
|
idev->stats.rx_dropped++;
|
| 658 |
|
|
if (ret & VLSI_RX_OVER)
|
| 659 |
|
|
idev->stats.rx_over_errors++;
|
| 660 |
|
|
if (ret & VLSI_RX_LENGTH)
|
| 661 |
|
|
idev->stats.rx_length_errors++;
|
| 662 |
|
|
if (ret & VLSI_RX_FRAME)
|
| 663 |
|
|
idev->stats.rx_frame_errors++;
|
| 664 |
|
|
if (ret & VLSI_RX_CRC)
|
| 665 |
|
|
idev->stats.rx_crc_errors++;
|
| 666 |
|
|
}
|
| 667 |
|
|
else if (ret > 0) {
|
| 668 |
|
|
idev->stats.rx_packets++;
|
| 669 |
|
|
idev->stats.rx_bytes += ret;
|
| 670 |
|
|
}
|
| 671 |
|
|
}
|
| 672 |
|
|
|
| 673 |
|
|
do_gettimeofday(&idev->last_rx); /* remember "now" for later mtt delay */
|
| 674 |
|
|
|
| 675 |
|
|
vlsi_fill_rx(r);
|
| 676 |
|
|
|
| 677 |
|
|
if (ring_first(r) == NULL) {
|
| 678 |
|
|
/* we are in big trouble, if this should ever happen */
|
| 679 |
|
|
IRDA_ERROR("%s: rx ring exhausted!\n", __FUNCTION__);
|
| 680 |
|
|
vlsi_ring_debug(r);
|
| 681 |
|
|
}
|
| 682 |
|
|
else
|
| 683 |
|
|
outw(0, ndev->base_addr+VLSI_PIO_PROMPT);
|
| 684 |
|
|
}
|
| 685 |
|
|
|
| 686 |
|
|
/* caller must have stopped the controller from busmastering */
|
| 687 |
|
|
|
| 688 |
|
|
static void vlsi_unarm_rx(vlsi_irda_dev_t *idev)
|
| 689 |
|
|
{
|
| 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)) {
|
| 700 |
|
|
IRDA_DEBUG(0, "%s - dropping rx packet\n", __FUNCTION__);
|
| 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;
|
| 715 |
|
|
idev->stats.rx_errors++;
|
| 716 |
|
|
if (ret & VLSI_RX_DROP)
|
| 717 |
|
|
idev->stats.rx_dropped++;
|
| 718 |
|
|
if (ret & VLSI_RX_OVER)
|
| 719 |
|
|
idev->stats.rx_over_errors++;
|
| 720 |
|
|
if (ret & VLSI_RX_LENGTH)
|
| 721 |
|
|
idev->stats.rx_length_errors++;
|
| 722 |
|
|
if (ret & VLSI_RX_FRAME)
|
| 723 |
|
|
idev->stats.rx_frame_errors++;
|
| 724 |
|
|
if (ret & VLSI_RX_CRC)
|
| 725 |
|
|
idev->stats.rx_crc_errors++;
|
| 726 |
|
|
}
|
| 727 |
|
|
else if (ret > 0) {
|
| 728 |
|
|
idev->stats.rx_packets++;
|
| 729 |
|
|
idev->stats.rx_bytes += ret;
|
| 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;
|
| 775 |
|
|
IRDA_DEBUG(2, "%s: %d -> %d\n", __FUNCTION__, idev->baud, idev->new_baud);
|
| 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",
|
| 792 |
|
|
__FUNCTION__, baudrate);
|
| 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) {
|
| 809 |
|
|
IRDA_DEBUG(0, "%s: rx fifo not empty(%d)\n", __FUNCTION__, fifocnt);
|
| 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)) {
|
| 833 |
|
|
IRDA_WARNING("%s: failed to set %s mode!\n", __FUNCTION__,
|
| 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",
|
| 840 |
|
|
__FUNCTION__, baudrate);
|
| 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)
|
| 852 |
|
|
vlsi_reg_debug(iobase,__FUNCTION__);
|
| 853 |
|
|
|
| 854 |
|
|
return ret;
|
| 855 |
|
|
}
|
| 856 |
|
|
|
| 857 |
|
|
static int vlsi_hard_start_xmit(struct sk_buff *skb, struct net_device *ndev)
|
| 858 |
|
|
{
|
| 859 |
|
|
vlsi_irda_dev_t *idev = ndev->priv;
|
| 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);
|
| 961 |
|
|
/* must not sleep here - called under netif_tx_lock! */
|
| 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",
|
| 985 |
|
|
__FUNCTION__);
|
| 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
|
| 996 |
|
|
skb_copy_from_linear_data(skb, rd->buf, len);
|
| 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) {
|
| 1030 |
|
|
IRDA_DEBUG(0, "%s: rx fifo not empty(%d)\n", __FUNCTION__, fifocnt);
|
| 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);
|
| 1043 |
|
|
IRDA_DEBUG(3, "%s: tx ring full - queue stopped\n", __FUNCTION__);
|
| 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:
|
| 1052 |
|
|
IRDA_WARNING("%s: dropping packet - %s\n", __FUNCTION__, msg);
|
| 1053 |
|
|
dev_kfree_skb_any(skb);
|
| 1054 |
|
|
idev->stats.tx_errors++;
|
| 1055 |
|
|
idev->stats.tx_dropped++;
|
| 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 |
|
|
{
|
| 1066 |
|
|
vlsi_irda_dev_t *idev = ndev->priv;
|
| 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;
|
| 1082 |
|
|
idev->stats.tx_errors++;
|
| 1083 |
|
|
if (ret & VLSI_TX_DROP)
|
| 1084 |
|
|
idev->stats.tx_dropped++;
|
| 1085 |
|
|
if (ret & VLSI_TX_FIFO)
|
| 1086 |
|
|
idev->stats.tx_fifo_errors++;
|
| 1087 |
|
|
}
|
| 1088 |
|
|
else if (ret > 0){
|
| 1089 |
|
|
idev->stats.tx_packets++;
|
| 1090 |
|
|
idev->stats.tx_bytes += ret;
|
| 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",
|
| 1109 |
|
|
__FUNCTION__, fifocnt);
|
| 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);
|
| 1118 |
|
|
IRDA_DEBUG(3, "%s: queue awoken\n", __FUNCTION__);
|
| 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 |
|
|
{
|
| 1126 |
|
|
struct vlsi_ring *r = idev->tx_ring;
|
| 1127 |
|
|
struct ring_descr *rd;
|
| 1128 |
|
|
int ret;
|
| 1129 |
|
|
|
| 1130 |
|
|
for (rd = ring_first(r); rd != NULL; rd = ring_get(r)) {
|
| 1131 |
|
|
|
| 1132 |
|
|
ret = 0;
|
| 1133 |
|
|
if (rd_is_active(rd)) {
|
| 1134 |
|
|
rd_set_status(rd, 0);
|
| 1135 |
|
|
rd_set_count(rd, 0);
|
| 1136 |
|
|
pci_dma_sync_single_for_cpu(r->pdev, rd_get_addr(rd), r->len, r->dir);
|
| 1137 |
|
|
if (rd->skb) {
|
| 1138 |
|
|
dev_kfree_skb_any(rd->skb);
|
| 1139 |
|
|
rd->skb = NULL;
|
| 1140 |
|
|
}
|
| 1141 |
|
|
IRDA_DEBUG(0, "%s - dropping tx packet\n", __FUNCTION__);
|
| 1142 |
|
|
ret = -VLSI_TX_DROP;
|
| 1143 |
|
|
}
|
| 1144 |
|
|
else
|
| 1145 |
|
|
ret = vlsi_process_tx(r, rd);
|
| 1146 |
|
|
|
| 1147 |
|
|
if (ret < 0) {
|
| 1148 |
|
|
ret = -ret;
|
| 1149 |
|
|
idev->stats.tx_errors++;
|
| 1150 |
|
|
if (ret & VLSI_TX_DROP)
|
| 1151 |
|
|
idev->stats.tx_dropped++;
|
| 1152 |
|
|
if (ret & VLSI_TX_FIFO)
|
| 1153 |
|
|
idev->stats.tx_fifo_errors++;
|
| 1154 |
|
|
}
|
| 1155 |
|
|
else if (ret > 0){
|
| 1156 |
|
|
idev->stats.tx_packets++;
|
| 1157 |
|
|
idev->stats.tx_bytes += ret;
|
| 1158 |
|
|
}
|
| 1159 |
|
|
}
|
| 1160 |
|
|
|
| 1161 |
|
|
}
|
| 1162 |
|
|
|
| 1163 |
|
|
/********************************************************/
|
| 1164 |
|
|
|
| 1165 |
|
|
static int vlsi_start_clock(struct pci_dev *pdev)
|
| 1166 |
|
|
{
|
| 1167 |
|
|
u8 clkctl, lock;
|
| 1168 |
|
|
int i, count;
|
| 1169 |
|
|
|
| 1170 |
|
|
if (clksrc < 2) { /* auto or PLL: try PLL */
|
| 1171 |
|
|
clkctl = CLKCTL_PD_INV | CLKCTL_CLKSTP;
|
| 1172 |
|
|
pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl);
|
| 1173 |
|
|
|
| 1174 |
|
|
/* procedure to detect PLL lock synchronisation:
|
| 1175 |
|
|
* after 0.5 msec initial delay we expect to find 3 PLL lock
|
| 1176 |
|
|
* indications within 10 msec for successful PLL detection.
|
| 1177 |
|
|
*/
|
| 1178 |
|
|
udelay(500);
|
| 1179 |
|
|
count = 0;
|
| 1180 |
|
|
for (i = 500; i <= 10000; i += 50) { /* max 10 msec */
|
| 1181 |
|
|
pci_read_config_byte(pdev, VLSI_PCI_CLKCTL, &lock);
|
| 1182 |
|
|
if (lock&CLKCTL_LOCK) {
|
| 1183 |
|
|
if (++count >= 3)
|
| 1184 |
|
|
break;
|
| 1185 |
|
|
}
|
| 1186 |
|
|
udelay(50);
|
| 1187 |
|
|
}
|
| 1188 |
|
|
if (count < 3) {
|
| 1189 |
|
|
if (clksrc == 1) { /* explicitly asked for PLL hence bail out */
|
| 1190 |
|
|
IRDA_ERROR("%s: no PLL or failed to lock!\n",
|
| 1191 |
|
|
__FUNCTION__);
|
| 1192 |
|
|
clkctl = CLKCTL_CLKSTP;
|
| 1193 |
|
|
pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl);
|
| 1194 |
|
|
return -1;
|
| 1195 |
|
|
}
|
| 1196 |
|
|
else /* was: clksrc=0(auto) */
|
| 1197 |
|
|
clksrc = 3; /* fallback to 40MHz XCLK (OB800) */
|
| 1198 |
|
|
|
| 1199 |
|
|
IRDA_DEBUG(0, "%s: PLL not locked, fallback to clksrc=%d\n",
|
| 1200 |
|
|
__FUNCTION__, clksrc);
|
| 1201 |
|
|
}
|
| 1202 |
|
|
else
|
| 1203 |
|
|
clksrc = 1; /* got successful PLL lock */
|
| 1204 |
|
|
}
|
| 1205 |
|
|
|
| 1206 |
|
|
if (clksrc != 1) {
|
| 1207 |
|
|
/* we get here if either no PLL detected in auto-mode or
|
| 1208 |
|
|
an external clock source was explicitly specified */
|
| 1209 |
|
|
|
| 1210 |
|
|
clkctl = CLKCTL_EXTCLK | CLKCTL_CLKSTP;
|
| 1211 |
|
|
if (clksrc == 3)
|
| 1212 |
|
|
clkctl |= CLKCTL_XCKSEL;
|
| 1213 |
|
|
pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl);
|
| 1214 |
|
|
|
| 1215 |
|
|
/* no way to test for working XCLK */
|
| 1216 |
|
|
}
|
| 1217 |
|
|
else
|
| 1218 |
|
|
pci_read_config_byte(pdev, VLSI_PCI_CLKCTL, &clkctl);
|
| 1219 |
|
|
|
| 1220 |
|
|
/* ok, now going to connect the chip with the clock source */
|
| 1221 |
|
|
|
| 1222 |
|
|
clkctl &= ~CLKCTL_CLKSTP;
|
| 1223 |
|
|
pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl);
|
| 1224 |
|
|
|
| 1225 |
|
|
return 0;
|
| 1226 |
|
|
}
|
| 1227 |
|
|
|
| 1228 |
|
|
static void vlsi_stop_clock(struct pci_dev *pdev)
|
| 1229 |
|
|
{
|
| 1230 |
|
|
u8 clkctl;
|
| 1231 |
|
|
|
| 1232 |
|
|
/* disconnect chip from clock source */
|
| 1233 |
|
|
pci_read_config_byte(pdev, VLSI_PCI_CLKCTL, &clkctl);
|
| 1234 |
|
|
clkctl |= CLKCTL_CLKSTP;
|
| 1235 |
|
|
pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl);
|
| 1236 |
|
|
|
| 1237 |
|
|
/* disable all clock sources */
|
| 1238 |
|
|
clkctl &= ~(CLKCTL_EXTCLK | CLKCTL_PD_INV);
|
| 1239 |
|
|
pci_write_config_byte(pdev, VLSI_PCI_CLKCTL, clkctl);
|
| 1240 |
|
|
}
|
| 1241 |
|
|
|
| 1242 |
|
|
/********************************************************/
|
| 1243 |
|
|
|
| 1244 |
|
|
/* writing all-zero to the VLSI PCI IO register area seems to prevent
|
| 1245 |
|
|
* some occasional situations where the hardware fails (symptoms are
|
| 1246 |
|
|
* what appears as stalled tx/rx state machines, i.e. everything ok for
|
| 1247 |
|
|
* receive or transmit but hw makes no progress or is unable to access
|
| 1248 |
|
|
* the bus memory locations).
|
| 1249 |
|
|
* Best place to call this is immediately after/before the internal clock
|
| 1250 |
|
|
* gets started/stopped.
|
| 1251 |
|
|
*/
|
| 1252 |
|
|
|
| 1253 |
|
|
static inline void vlsi_clear_regs(unsigned iobase)
|
| 1254 |
|
|
{
|
| 1255 |
|
|
unsigned i;
|
| 1256 |
|
|
const unsigned chip_io_extent = 32;
|
| 1257 |
|
|
|
| 1258 |
|
|
for (i = 0; i < chip_io_extent; i += sizeof(u16))
|
| 1259 |
|
|
outw(0, iobase + i);
|
| 1260 |
|
|
}
|
| 1261 |
|
|
|
| 1262 |
|
|
static int vlsi_init_chip(struct pci_dev *pdev)
|
| 1263 |
|
|
{
|
| 1264 |
|
|
struct net_device *ndev = pci_get_drvdata(pdev);
|
| 1265 |
|
|
vlsi_irda_dev_t *idev = ndev->priv;
|
| 1266 |
|
|
unsigned iobase;
|
| 1267 |
|
|
u16 ptr;
|
| 1268 |
|
|
|
| 1269 |
|
|
/* start the clock and clean the registers */
|
| 1270 |
|
|
|
| 1271 |
|
|
if (vlsi_start_clock(pdev)) {
|
| 1272 |
|
|
IRDA_ERROR("%s: no valid clock source\n", __FUNCTION__);
|
| 1273 |
|
|
return -1;
|
| 1274 |
|
|
}
|
| 1275 |
|
|
iobase = ndev->base_addr;
|
| 1276 |
|
|
vlsi_clear_regs(iobase);
|
| 1277 |
|
|
|
| 1278 |
|
|
outb(IRINTR_INT_MASK, iobase+VLSI_PIO_IRINTR); /* w/c pending IRQ, disable all INT */
|
| 1279 |
|
|
|
| 1280 |
|
|
outw(0, iobase+VLSI_PIO_IRENABLE); /* disable IrPHY-interface */
|
| 1281 |
|
|
|
| 1282 |
|
|
/* disable everything, particularly IRCFG_MSTR - (also resetting the RING_PTR) */
|
| 1283 |
|
|
|
| 1284 |
|
|
outw(0, iobase+VLSI_PIO_IRCFG);
|
| 1285 |
|
|
wmb();
|
| 1286 |
|
|
|
| 1287 |
|
|
outw(MAX_PACKET_LENGTH, iobase+VLSI_PIO_MAXPKT); /* max possible value=0x0fff */
|
| 1288 |
|
|
|
| 1289 |
|
|
outw(BUS_TO_RINGBASE(idev->busaddr), iobase+VLSI_PIO_RINGBASE);
|
| 1290 |
|
|
|
| 1291 |
|
|
outw(TX_RX_TO_RINGSIZE(idev->tx_ring->size, idev->rx_ring->size),
|
| 1292 |
|
|
iobase+VLSI_PIO_RINGSIZE);
|
| 1293 |
|
|
|
| 1294 |
|
|
ptr = inw(iobase+VLSI_PIO_RINGPTR);
|
| 1295 |
|
|
atomic_set(&idev->rx_ring->head, RINGPTR_GET_RX(ptr));
|
| 1296 |
|
|
atomic_set(&idev->rx_ring->tail, RINGPTR_GET_RX(ptr));
|
| 1297 |
|
|
atomic_set(&idev->tx_ring->head, RINGPTR_GET_TX(ptr));
|
| 1298 |
|
|
atomic_set(&idev->tx_ring->tail, RINGPTR_GET_TX(ptr));
|
| 1299 |
|
|
|
| 1300 |
|
|
vlsi_set_baud(idev, iobase); /* idev->new_baud used as provided by caller */
|
| 1301 |
|
|
|
| 1302 |
|
|
outb(IRINTR_INT_MASK, iobase+VLSI_PIO_IRINTR); /* just in case - w/c pending IRQ's */
|
| 1303 |
|
|
wmb();
|
| 1304 |
|
|
|
| 1305 |
|
|
/* DO NOT BLINDLY ENABLE IRINTR_ACTEN!
|
| 1306 |
|
|
* basically every received pulse fires an ACTIVITY-INT
|
| 1307 |
|
|
* leading to >>1000 INT's per second instead of few 10
|
| 1308 |
|
|
*/
|
| 1309 |
|
|
|
| 1310 |
|
|
outb(IRINTR_RPKTEN|IRINTR_TPKTEN, iobase+VLSI_PIO_IRINTR);
|
| 1311 |
|
|
|
| 1312 |
|
|
return 0;
|
| 1313 |
|
|
}
|
| 1314 |
|
|
|
| 1315 |
|
|
static int vlsi_start_hw(vlsi_irda_dev_t *idev)
|
| 1316 |
|
|
{
|
| 1317 |
|
|
struct pci_dev *pdev = idev->pdev;
|
| 1318 |
|
|
struct net_device *ndev = pci_get_drvdata(pdev);
|
| 1319 |
|
|
unsigned iobase = ndev->base_addr;
|
| 1320 |
|
|
u8 byte;
|
| 1321 |
|
|
|
| 1322 |
|
|
/* we don't use the legacy UART, disable its address decoding */
|
| 1323 |
|
|
|
| 1324 |
|
|
pci_read_config_byte(pdev, VLSI_PCI_IRMISC, &byte);
|
| 1325 |
|
|
byte &= ~(IRMISC_UARTEN | IRMISC_UARTTST);
|
| 1326 |
|
|
pci_write_config_byte(pdev, VLSI_PCI_IRMISC, byte);
|
| 1327 |
|
|
|
| 1328 |
|
|
/* enable PCI busmaster access to our 16MB page */
|
| 1329 |
|
|
|
| 1330 |
|
|
pci_write_config_byte(pdev, VLSI_PCI_MSTRPAGE, MSTRPAGE_VALUE);
|
| 1331 |
|
|
pci_set_master(pdev);
|
| 1332 |
|
|
|
| 1333 |
|
|
if (vlsi_init_chip(pdev) < 0) {
|
| 1334 |
|
|
pci_disable_device(pdev);
|
| 1335 |
|
|
return -1;
|
| 1336 |
|
|
}
|
| 1337 |
|
|
|
| 1338 |
|
|
vlsi_fill_rx(idev->rx_ring);
|
| 1339 |
|
|
|
| 1340 |
|
|
do_gettimeofday(&idev->last_rx); /* first mtt may start from now on */
|
| 1341 |
|
|
|
| 1342 |
|
|
outw(0, iobase+VLSI_PIO_PROMPT); /* kick hw state machine */
|
| 1343 |
|
|
|
| 1344 |
|
|
return 0;
|
| 1345 |
|
|
}
|
| 1346 |
|
|
|
| 1347 |
|
|
static int vlsi_stop_hw(vlsi_irda_dev_t *idev)
|
| 1348 |
|
|
{
|
| 1349 |
|
|
struct pci_dev *pdev = idev->pdev;
|
| 1350 |
|
|
struct net_device *ndev = pci_get_drvdata(pdev);
|
| 1351 |
|
|
unsigned iobase = ndev->base_addr;
|
| 1352 |
|
|
unsigned long flags;
|
| 1353 |
|
|
|
| 1354 |
|
|
spin_lock_irqsave(&idev->lock,flags);
|
| 1355 |
|
|
outw(0, iobase+VLSI_PIO_IRENABLE);
|
| 1356 |
|
|
outw(0, iobase+VLSI_PIO_IRCFG); /* disable everything */
|
| 1357 |
|
|
|
| 1358 |
|
|
/* disable and w/c irqs */
|
| 1359 |
|
|
outb(0, iobase+VLSI_PIO_IRINTR);
|
| 1360 |
|
|
wmb();
|
| 1361 |
|
|
outb(IRINTR_INT_MASK, iobase+VLSI_PIO_IRINTR);
|
| 1362 |
|
|
spin_unlock_irqrestore(&idev->lock,flags);
|
| 1363 |
|
|
|
| 1364 |
|
|
vlsi_unarm_tx(idev);
|
| 1365 |
|
|
vlsi_unarm_rx(idev);
|
| 1366 |
|
|
|
| 1367 |
|
|
vlsi_clear_regs(iobase);
|
| 1368 |
|
|
vlsi_stop_clock(pdev);
|
| 1369 |
|
|
|
| 1370 |
|
|
pci_disable_device(pdev);
|
| 1371 |
|
|
|
| 1372 |
|
|
return 0;
|
| 1373 |
|
|
}
|
| 1374 |
|
|
|
| 1375 |
|
|
/**************************************************************/
|
| 1376 |
|
|
|
| 1377 |
|
|
static struct net_device_stats * vlsi_get_stats(struct net_device *ndev)
|
| 1378 |
|
|
{
|
| 1379 |
|
|
vlsi_irda_dev_t *idev = ndev->priv;
|
| 1380 |
|
|
|
| 1381 |
|
|
return &idev->stats;
|
| 1382 |
|
|
}
|
| 1383 |
|
|
|
| 1384 |
|
|
static void vlsi_tx_timeout(struct net_device *ndev)
|
| 1385 |
|
|
{
|
| 1386 |
|
|
vlsi_irda_dev_t *idev = ndev->priv;
|
| 1387 |
|
|
|
| 1388 |
|
|
|
| 1389 |
|
|
vlsi_reg_debug(ndev->base_addr, __FUNCTION__);
|
| 1390 |
|
|
vlsi_ring_debug(idev->tx_ring);
|
| 1391 |
|
|
|
| 1392 |
|
|
if (netif_running(ndev))
|
| 1393 |
|
|
netif_stop_queue(ndev);
|
| 1394 |
|
|
|
| 1395 |
|
|
vlsi_stop_hw(idev);
|
| 1396 |
|
|
|
| 1397 |
|
|
/* now simply restart the whole thing */
|
| 1398 |
|
|
|
| 1399 |
|
|
if (!idev->new_baud)
|
| 1400 |
|
|
idev->new_baud = idev->baud; /* keep current baudrate */
|
| 1401 |
|
|
|
| 1402 |
|
|
if (vlsi_start_hw(idev))
|
| 1403 |
|
|
IRDA_ERROR("%s: failed to restart hw - %s(%s) unusable!\n",
|
| 1404 |
|
|
__FUNCTION__, pci_name(idev->pdev), ndev->name);
|
| 1405 |
|
|
else
|
| 1406 |
|
|
netif_start_queue(ndev);
|
| 1407 |
|
|
}
|
| 1408 |
|
|
|
| 1409 |
|
|
static int vlsi_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd)
|
| 1410 |
|
|
{
|
| 1411 |
|
|
vlsi_irda_dev_t *idev = ndev->priv;
|
| 1412 |
|
|
struct if_irda_req *irq = (struct if_irda_req *) rq;
|
| 1413 |
|
|
unsigned long flags;
|
| 1414 |
|
|
u16 fifocnt;
|
| 1415 |
|
|
int ret = 0;
|
| 1416 |
|
|
|
| 1417 |
|
|
switch (cmd) {
|
| 1418 |
|
|
case SIOCSBANDWIDTH:
|
| 1419 |
|
|
if (!capable(CAP_NET_ADMIN)) {
|
| 1420 |
|
|
ret = -EPERM;
|
| 1421 |
|
|
break;
|
| 1422 |
|
|
}
|
| 1423 |
|
|
spin_lock_irqsave(&idev->lock, flags);
|
| 1424 |
|
|
idev->new_baud = irq->ifr_baudrate;
|
| 1425 |
|
|
/* when called from userland there might be a minor race window here
|
| 1426 |
|
|
* if the stack tries to change speed concurrently - which would be
|
| 1427 |
|
|
* pretty strange anyway with the userland having full control...
|
| 1428 |
|
|
*/
|
| 1429 |
|
|
vlsi_set_baud(idev, ndev->base_addr);
|
| 1430 |
|
|
spin_unlock_irqrestore(&idev->lock, flags);
|
| 1431 |
|
|
break;
|
| 1432 |
|
|
case SIOCSMEDIABUSY:
|
| 1433 |
|
|
if (!capable(CAP_NET_ADMIN)) {
|
| 1434 |
|
|
ret = -EPERM;
|
| 1435 |
|
|
break;
|
| 1436 |
|
|
}
|
| 1437 |
|
|
irda_device_set_media_busy(ndev, TRUE);
|
| 1438 |
|
|
break;
|
| 1439 |
|
|
case SIOCGRECEIVING:
|
| 1440 |
|
|
/* the best we can do: check whether there are any bytes in rx fifo.
|
| 1441 |
|
|
* The trustable window (in case some data arrives just afterwards)
|
| 1442 |
|
|
* may be as short as 1usec or so at 4Mbps.
|
| 1443 |
|
|
*/
|
| 1444 |
|
|
fifocnt = inw(ndev->base_addr+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK;
|
| 1445 |
|
|
irq->ifr_receiving = (fifocnt!=0) ? 1 : 0;
|
| 1446 |
|
|
break;
|
| 1447 |
|
|
default:
|
| 1448 |
|
|
IRDA_WARNING("%s: notsupp - cmd=%04x\n",
|
| 1449 |
|
|
__FUNCTION__, cmd);
|
| 1450 |
|
|
ret = -EOPNOTSUPP;
|
| 1451 |
|
|
}
|
| 1452 |
|
|
|
| 1453 |
|
|
return ret;
|
| 1454 |
|
|
}
|
| 1455 |
|
|
|
| 1456 |
|
|
/********************************************************/
|
| 1457 |
|
|
|
| 1458 |
|
|
static irqreturn_t vlsi_interrupt(int irq, void *dev_instance)
|
| 1459 |
|
|
{
|
| 1460 |
|
|
struct net_device *ndev = dev_instance;
|
| 1461 |
|
|
vlsi_irda_dev_t *idev = ndev->priv;
|
| 1462 |
|
|
unsigned iobase;
|
| 1463 |
|
|
u8 irintr;
|
| 1464 |
|
|
int boguscount = 5;
|
| 1465 |
|
|
unsigned long flags;
|
| 1466 |
|
|
int handled = 0;
|
| 1467 |
|
|
|
| 1468 |
|
|
iobase = ndev->base_addr;
|
| 1469 |
|
|
spin_lock_irqsave(&idev->lock,flags);
|
| 1470 |
|
|
do {
|
| 1471 |
|
|
irintr = inb(iobase+VLSI_PIO_IRINTR);
|
| 1472 |
|
|
mb();
|
| 1473 |
|
|
outb(irintr, iobase+VLSI_PIO_IRINTR); /* acknowledge asap */
|
| 1474 |
|
|
|
| 1475 |
|
|
if (!(irintr&=IRINTR_INT_MASK)) /* not our INT - probably shared */
|
| 1476 |
|
|
break;
|
| 1477 |
|
|
|
| 1478 |
|
|
handled = 1;
|
| 1479 |
|
|
|
| 1480 |
|
|
if (unlikely(!(irintr & ~IRINTR_ACTIVITY)))
|
| 1481 |
|
|
break; /* nothing todo if only activity */
|
| 1482 |
|
|
|
| 1483 |
|
|
if (irintr&IRINTR_RPKTINT)
|
| 1484 |
|
|
vlsi_rx_interrupt(ndev);
|
| 1485 |
|
|
|
| 1486 |
|
|
if (irintr&IRINTR_TPKTINT)
|
| 1487 |
|
|
vlsi_tx_interrupt(ndev);
|
| 1488 |
|
|
|
| 1489 |
|
|
} while (--boguscount > 0);
|
| 1490 |
|
|
spin_unlock_irqrestore(&idev->lock,flags);
|
| 1491 |
|
|
|
| 1492 |
|
|
if (boguscount <= 0)
|
| 1493 |
|
|
IRDA_MESSAGE("%s: too much work in interrupt!\n",
|
| 1494 |
|
|
__FUNCTION__);
|
| 1495 |
|
|
return IRQ_RETVAL(handled);
|
| 1496 |
|
|
}
|
| 1497 |
|
|
|
| 1498 |
|
|
/********************************************************/
|
| 1499 |
|
|
|
| 1500 |
|
|
static int vlsi_open(struct net_device *ndev)
|
| 1501 |
|
|
{
|
| 1502 |
|
|
vlsi_irda_dev_t *idev = ndev->priv;
|
| 1503 |
|
|
int err = -EAGAIN;
|
| 1504 |
|
|
char hwname[32];
|
| 1505 |
|
|
|
| 1506 |
|
|
if (pci_request_regions(idev->pdev, drivername)) {
|
| 1507 |
|
|
IRDA_WARNING("%s: io resource busy\n", __FUNCTION__);
|
| 1508 |
|
|
goto errout;
|
| 1509 |
|
|
}
|
| 1510 |
|
|
ndev->base_addr = pci_resource_start(idev->pdev,0);
|
| 1511 |
|
|
ndev->irq = idev->pdev->irq;
|
| 1512 |
|
|
|
| 1513 |
|
|
/* under some rare occasions the chip apparently comes up with
|
| 1514 |
|
|
* IRQ's pending. We better w/c pending IRQ and disable them all
|
| 1515 |
|
|
*/
|
| 1516 |
|
|
|
| 1517 |
|
|
outb(IRINTR_INT_MASK, ndev->base_addr+VLSI_PIO_IRINTR);
|
| 1518 |
|
|
|
| 1519 |
|
|
if (request_irq(ndev->irq, vlsi_interrupt, IRQF_SHARED,
|
| 1520 |
|
|
drivername, ndev)) {
|
| 1521 |
|
|
IRDA_WARNING("%s: couldn't get IRQ: %d\n",
|
| 1522 |
|
|
__FUNCTION__, ndev->irq);
|
| 1523 |
|
|
goto errout_io;
|
| 1524 |
|
|
}
|
| 1525 |
|
|
|
| 1526 |
|
|
if ((err = vlsi_create_hwif(idev)) != 0)
|
| 1527 |
|
|
goto errout_irq;
|
| 1528 |
|
|
|
| 1529 |
|
|
sprintf(hwname, "VLSI-FIR @ 0x%04x", (unsigned)ndev->base_addr);
|
| 1530 |
|
|
idev->irlap = irlap_open(ndev,&idev->qos,hwname);
|
| 1531 |
|
|
if (!idev->irlap)
|
| 1532 |
|
|
goto errout_free_ring;
|
| 1533 |
|
|
|
| 1534 |
|
|
do_gettimeofday(&idev->last_rx); /* first mtt may start from now on */
|
| 1535 |
|
|
|
| 1536 |
|
|
idev->new_baud = 9600; /* start with IrPHY using 9600(SIR) mode */
|
| 1537 |
|
|
|
| 1538 |
|
|
if ((err = vlsi_start_hw(idev)) != 0)
|
| 1539 |
|
|
goto errout_close_irlap;
|
| 1540 |
|
|
|
| 1541 |
|
|
netif_start_queue(ndev);
|
| 1542 |
|
|
|
| 1543 |
|
|
IRDA_MESSAGE("%s: device %s operational\n", __FUNCTION__, ndev->name);
|
| 1544 |
|
|
|
| 1545 |
|
|
return 0;
|
| 1546 |
|
|
|
| 1547 |
|
|
errout_close_irlap:
|
| 1548 |
|
|
irlap_close(idev->irlap);
|
| 1549 |
|
|
errout_free_ring:
|
| 1550 |
|
|
vlsi_destroy_hwif(idev);
|
| 1551 |
|
|
errout_irq:
|
| 1552 |
|
|
free_irq(ndev->irq,ndev);
|
| 1553 |
|
|
errout_io:
|
| 1554 |
|
|
pci_release_regions(idev->pdev);
|
| 1555 |
|
|
errout:
|
| 1556 |
|
|
return err;
|
| 1557 |
|
|
}
|
| 1558 |
|
|
|
| 1559 |
|
|
static int vlsi_close(struct net_device *ndev)
|
| 1560 |
|
|
{
|
| 1561 |
|
|
vlsi_irda_dev_t *idev = ndev->priv;
|
| 1562 |
|
|
|
| 1563 |
|
|
netif_stop_queue(ndev);
|
| 1564 |
|
|
|
| 1565 |
|
|
if (idev->irlap)
|
| 1566 |
|
|
irlap_close(idev->irlap);
|
| 1567 |
|
|
idev->irlap = NULL;
|
| 1568 |
|
|
|
| 1569 |
|
|
vlsi_stop_hw(idev);
|
| 1570 |
|
|
|
| 1571 |
|
|
vlsi_destroy_hwif(idev);
|
| 1572 |
|
|
|
| 1573 |
|
|
free_irq(ndev->irq,ndev);
|
| 1574 |
|
|
|
| 1575 |
|
|
pci_release_regions(idev->pdev);
|
| 1576 |
|
|
|
| 1577 |
|
|
IRDA_MESSAGE("%s: device %s stopped\n", __FUNCTION__, ndev->name);
|
| 1578 |
|
|
|
| 1579 |
|
|
return 0;
|
| 1580 |
|
|
}
|
| 1581 |
|
|
|
| 1582 |
|
|
static int vlsi_irda_init(struct net_device *ndev)
|
| 1583 |
|
|
{
|
| 1584 |
|
|
vlsi_irda_dev_t *idev = ndev->priv;
|
| 1585 |
|
|
struct pci_dev *pdev = idev->pdev;
|
| 1586 |
|
|
|
| 1587 |
|
|
ndev->irq = pdev->irq;
|
| 1588 |
|
|
ndev->base_addr = pci_resource_start(pdev,0);
|
| 1589 |
|
|
|
| 1590 |
|
|
/* PCI busmastering
|
| 1591 |
|
|
* see include file for details why we need these 2 masks, in this order!
|
| 1592 |
|
|
*/
|
| 1593 |
|
|
|
| 1594 |
|
|
if (pci_set_dma_mask(pdev,DMA_MASK_USED_BY_HW)
|
| 1595 |
|
|
|| pci_set_dma_mask(pdev,DMA_MASK_MSTRPAGE)) {
|
| 1596 |
|
|
IRDA_ERROR("%s: aborting due to PCI BM-DMA address limitations\n", __FUNCTION__);
|
| 1597 |
|
|
return -1;
|
| 1598 |
|
|
}
|
| 1599 |
|
|
|
| 1600 |
|
|
irda_init_max_qos_capabilies(&idev->qos);
|
| 1601 |
|
|
|
| 1602 |
|
|
/* the VLSI82C147 does not support 576000! */
|
| 1603 |
|
|
|
| 1604 |
|
|
idev->qos.baud_rate.bits = IR_2400 | IR_9600
|
| 1605 |
|
|
| IR_19200 | IR_38400 | IR_57600 | IR_115200
|
| 1606 |
|
|
| IR_1152000 | (IR_4000000 << 8);
|
| 1607 |
|
|
|
| 1608 |
|
|
idev->qos.min_turn_time.bits = qos_mtt_bits;
|
| 1609 |
|
|
|
| 1610 |
|
|
irda_qos_bits_to_value(&idev->qos);
|
| 1611 |
|
|
|
| 1612 |
|
|
/* currently no public media definitions for IrDA */
|
| 1613 |
|
|
|
| 1614 |
|
|
ndev->flags |= IFF_PORTSEL | IFF_AUTOMEDIA;
|
| 1615 |
|
|
ndev->if_port = IF_PORT_UNKNOWN;
|
| 1616 |
|
|
|
| 1617 |
|
|
ndev->open = vlsi_open;
|
| 1618 |
|
|
ndev->stop = vlsi_close;
|
| 1619 |
|
|
ndev->get_stats = vlsi_get_stats;
|
| 1620 |
|
|
ndev->hard_start_xmit = vlsi_hard_start_xmit;
|
| 1621 |
|
|
ndev->do_ioctl = vlsi_ioctl;
|
| 1622 |
|
|
ndev->tx_timeout = vlsi_tx_timeout;
|
| 1623 |
|
|
ndev->watchdog_timeo = 500*HZ/1000; /* max. allowed turn time for IrLAP */
|
| 1624 |
|
|
|
| 1625 |
|
|
SET_NETDEV_DEV(ndev, &pdev->dev);
|
| 1626 |
|
|
|
| 1627 |
|
|
return 0;
|
| 1628 |
|
|
}
|
| 1629 |
|
|
|
| 1630 |
|
|
/**************************************************************/
|
| 1631 |
|
|
|
| 1632 |
|
|
static int __devinit
|
| 1633 |
|
|
vlsi_irda_probe(struct pci_dev *pdev, const struct pci_device_id *id)
|
| 1634 |
|
|
{
|
| 1635 |
|
|
struct net_device *ndev;
|
| 1636 |
|
|
vlsi_irda_dev_t *idev;
|
| 1637 |
|
|
|
| 1638 |
|
|
if (pci_enable_device(pdev))
|
| 1639 |
|
|
goto out;
|
| 1640 |
|
|
else
|
| 1641 |
|
|
pdev->current_state = 0; /* hw must be running now */
|
| 1642 |
|
|
|
| 1643 |
|
|
IRDA_MESSAGE("%s: IrDA PCI controller %s detected\n",
|
| 1644 |
|
|
drivername, pci_name(pdev));
|
| 1645 |
|
|
|
| 1646 |
|
|
if ( !pci_resource_start(pdev,0)
|
| 1647 |
|
|
|| !(pci_resource_flags(pdev,0) & IORESOURCE_IO) ) {
|
| 1648 |
|
|
IRDA_ERROR("%s: bar 0 invalid", __FUNCTION__);
|
| 1649 |
|
|
goto out_disable;
|
| 1650 |
|
|
}
|
| 1651 |
|
|
|
| 1652 |
|
|
ndev = alloc_irdadev(sizeof(*idev));
|
| 1653 |
|
|
if (ndev==NULL) {
|
| 1654 |
|
|
IRDA_ERROR("%s: Unable to allocate device memory.\n",
|
| 1655 |
|
|
__FUNCTION__);
|
| 1656 |
|
|
goto out_disable;
|
| 1657 |
|
|
}
|
| 1658 |
|
|
|
| 1659 |
|
|
idev = ndev->priv;
|
| 1660 |
|
|
|
| 1661 |
|
|
spin_lock_init(&idev->lock);
|
| 1662 |
|
|
mutex_init(&idev->mtx);
|
| 1663 |
|
|
mutex_lock(&idev->mtx);
|
| 1664 |
|
|
idev->pdev = pdev;
|
| 1665 |
|
|
|
| 1666 |
|
|
if (vlsi_irda_init(ndev) < 0)
|
| 1667 |
|
|
goto out_freedev;
|
| 1668 |
|
|
|
| 1669 |
|
|
if (register_netdev(ndev) < 0) {
|
| 1670 |
|
|
IRDA_ERROR("%s: register_netdev failed\n", __FUNCTION__);
|
| 1671 |
|
|
goto out_freedev;
|
| 1672 |
|
|
}
|
| 1673 |
|
|
|
| 1674 |
|
|
if (vlsi_proc_root != NULL) {
|
| 1675 |
|
|
struct proc_dir_entry *ent;
|
| 1676 |
|
|
|
| 1677 |
|
|
ent = create_proc_entry(ndev->name, S_IFREG|S_IRUGO, vlsi_proc_root);
|
| 1678 |
|
|
if (!ent) {
|
| 1679 |
|
|
IRDA_WARNING("%s: failed to create proc entry\n",
|
| 1680 |
|
|
__FUNCTION__);
|
| 1681 |
|
|
} else {
|
| 1682 |
|
|
ent->data = ndev;
|
| 1683 |
|
|
ent->proc_fops = VLSI_PROC_FOPS;
|
| 1684 |
|
|
ent->size = 0;
|
| 1685 |
|
|
}
|
| 1686 |
|
|
idev->proc_entry = ent;
|
| 1687 |
|
|
}
|
| 1688 |
|
|
IRDA_MESSAGE("%s: registered device %s\n", drivername, ndev->name);
|
| 1689 |
|
|
|
| 1690 |
|
|
pci_set_drvdata(pdev, ndev);
|
| 1691 |
|
|
mutex_unlock(&idev->mtx);
|
| 1692 |
|
|
|
| 1693 |
|
|
return 0;
|
| 1694 |
|
|
|
| 1695 |
|
|
out_freedev:
|
| 1696 |
|
|
mutex_unlock(&idev->mtx);
|
| 1697 |
|
|
free_netdev(ndev);
|
| 1698 |
|
|
out_disable:
|
| 1699 |
|
|
pci_disable_device(pdev);
|
| 1700 |
|
|
out:
|
| 1701 |
|
|
pci_set_drvdata(pdev, NULL);
|
| 1702 |
|
|
return -ENODEV;
|
| 1703 |
|
|
}
|
| 1704 |
|
|
|
| 1705 |
|
|
static void __devexit vlsi_irda_remove(struct pci_dev *pdev)
|
| 1706 |
|
|
{
|
| 1707 |
|
|
struct net_device *ndev = pci_get_drvdata(pdev);
|
| 1708 |
|
|
vlsi_irda_dev_t *idev;
|
| 1709 |
|
|
|
| 1710 |
|
|
if (!ndev) {
|
| 1711 |
|
|
IRDA_ERROR("%s: lost netdevice?\n", drivername);
|
| 1712 |
|
|
return;
|
| 1713 |
|
|
}
|
| 1714 |
|
|
|
| 1715 |
|
|
unregister_netdev(ndev);
|
| 1716 |
|
|
|
| 1717 |
|
|
idev = ndev->priv;
|
| 1718 |
|
|
mutex_lock(&idev->mtx);
|
| 1719 |
|
|
if (idev->proc_entry) {
|
| 1720 |
|
|
remove_proc_entry(ndev->name, vlsi_proc_root);
|
| 1721 |
|
|
idev->proc_entry = NULL;
|
| 1722 |
|
|
}
|
| 1723 |
|
|
mutex_unlock(&idev->mtx);
|
| 1724 |
|
|
|
| 1725 |
|
|
free_netdev(ndev);
|
| 1726 |
|
|
|
| 1727 |
|
|
pci_set_drvdata(pdev, NULL);
|
| 1728 |
|
|
|
| 1729 |
|
|
IRDA_MESSAGE("%s: %s removed\n", drivername, pci_name(pdev));
|
| 1730 |
|
|
}
|
| 1731 |
|
|
|
| 1732 |
|
|
#ifdef CONFIG_PM
|
| 1733 |
|
|
|
| 1734 |
|
|
/* The Controller doesn't provide PCI PM capabilities as defined by PCI specs.
|
| 1735 |
|
|
* Some of the Linux PCI-PM code however depends on this, for example in
|
| 1736 |
|
|
* pci_set_power_state(). So we have to take care to perform the required
|
| 1737 |
|
|
* operations on our own (particularly reflecting the pdev->current_state)
|
| 1738 |
|
|
* otherwise we might get cheated by pci-pm.
|
| 1739 |
|
|
*/
|
| 1740 |
|
|
|
| 1741 |
|
|
|
| 1742 |
|
|
static int vlsi_irda_suspend(struct pci_dev *pdev, pm_message_t state)
|
| 1743 |
|
|
{
|
| 1744 |
|
|
struct net_device *ndev = pci_get_drvdata(pdev);
|
| 1745 |
|
|
vlsi_irda_dev_t *idev;
|
| 1746 |
|
|
|
| 1747 |
|
|
if (!ndev) {
|
| 1748 |
|
|
IRDA_ERROR("%s - %s: no netdevice \n",
|
| 1749 |
|
|
__FUNCTION__, pci_name(pdev));
|
| 1750 |
|
|
return 0;
|
| 1751 |
|
|
}
|
| 1752 |
|
|
idev = ndev->priv;
|
| 1753 |
|
|
mutex_lock(&idev->mtx);
|
| 1754 |
|
|
if (pdev->current_state != 0) { /* already suspended */
|
| 1755 |
|
|
if (state.event > pdev->current_state) { /* simply go deeper */
|
| 1756 |
|
|
pci_set_power_state(pdev, pci_choose_state(pdev, state));
|
| 1757 |
|
|
pdev->current_state = state.event;
|
| 1758 |
|
|
}
|
| 1759 |
|
|
else
|
| 1760 |
|
|
IRDA_ERROR("%s - %s: invalid suspend request %u -> %u\n", __FUNCTION__, pci_name(pdev), pdev->current_state, state.event);
|
| 1761 |
|
|
mutex_unlock(&idev->mtx);
|
| 1762 |
|
|
return 0;
|
| 1763 |
|
|
}
|
| 1764 |
|
|
|
| 1765 |
|
|
if (netif_running(ndev)) {
|
| 1766 |
|
|
netif_device_detach(ndev);
|
| 1767 |
|
|
vlsi_stop_hw(idev);
|
| 1768 |
|
|
pci_save_state(pdev);
|
| 1769 |
|
|
if (!idev->new_baud)
|
| 1770 |
|
|
/* remember speed settings to restore on resume */
|
| 1771 |
|
|
idev->new_baud = idev->baud;
|
| 1772 |
|
|
}
|
| 1773 |
|
|
|
| 1774 |
|
|
pci_set_power_state(pdev, pci_choose_state(pdev, state));
|
| 1775 |
|
|
pdev->current_state = state.event;
|
| 1776 |
|
|
idev->resume_ok = 1;
|
| 1777 |
|
|
mutex_unlock(&idev->mtx);
|
| 1778 |
|
|
return 0;
|
| 1779 |
|
|
}
|
| 1780 |
|
|
|
| 1781 |
|
|
static int vlsi_irda_resume(struct pci_dev *pdev)
|
| 1782 |
|
|
{
|
| 1783 |
|
|
struct net_device *ndev = pci_get_drvdata(pdev);
|
| 1784 |
|
|
vlsi_irda_dev_t *idev;
|
| 1785 |
|
|
|
| 1786 |
|
|
if (!ndev) {
|
| 1787 |
|
|
IRDA_ERROR("%s - %s: no netdevice \n",
|
| 1788 |
|
|
__FUNCTION__, pci_name(pdev));
|
| 1789 |
|
|
return 0;
|
| 1790 |
|
|
}
|
| 1791 |
|
|
idev = ndev->priv;
|
| 1792 |
|
|
mutex_lock(&idev->mtx);
|
| 1793 |
|
|
if (pdev->current_state == 0) {
|
| 1794 |
|
|
mutex_unlock(&idev->mtx);
|
| 1795 |
|
|
IRDA_WARNING("%s - %s: already resumed\n",
|
| 1796 |
|
|
__FUNCTION__, pci_name(pdev));
|
| 1797 |
|
|
return 0;
|
| 1798 |
|
|
}
|
| 1799 |
|
|
|
| 1800 |
|
|
pci_set_power_state(pdev, PCI_D0);
|
| 1801 |
|
|
pdev->current_state = PM_EVENT_ON;
|
| 1802 |
|
|
|
| 1803 |
|
|
if (!idev->resume_ok) {
|
| 1804 |
|
|
/* should be obsolete now - but used to happen due to:
|
| 1805 |
|
|
* - pci layer initially setting pdev->current_state = 4 (unknown)
|
| 1806 |
|
|
* - pci layer did not walk the save_state-tree (might be APM problem)
|
| 1807 |
|
|
* so we could not refuse to suspend from undefined state
|
| 1808 |
|
|
* - vlsi_irda_suspend detected invalid state and refused to save
|
| 1809 |
|
|
* configuration for resume - but was too late to stop suspending
|
| 1810 |
|
|
* - vlsi_irda_resume got screwed when trying to resume from garbage
|
| 1811 |
|
|
*
|
| 1812 |
|
|
* now we explicitly set pdev->current_state = 0 after enabling the
|
| 1813 |
|
|
* device and independently resume_ok should catch any garbage config.
|
| 1814 |
|
|
*/
|
| 1815 |
|
|
IRDA_WARNING("%s - hm, nothing to resume?\n", __FUNCTION__);
|
| 1816 |
|
|
mutex_unlock(&idev->mtx);
|
| 1817 |
|
|
return 0;
|
| 1818 |
|
|
}
|
| 1819 |
|
|
|
| 1820 |
|
|
if (netif_running(ndev)) {
|
| 1821 |
|
|
pci_restore_state(pdev);
|
| 1822 |
|
|
vlsi_start_hw(idev);
|
| 1823 |
|
|
netif_device_attach(ndev);
|
| 1824 |
|
|
}
|
| 1825 |
|
|
idev->resume_ok = 0;
|
| 1826 |
|
|
mutex_unlock(&idev->mtx);
|
| 1827 |
|
|
return 0;
|
| 1828 |
|
|
}
|
| 1829 |
|
|
|
| 1830 |
|
|
#endif /* CONFIG_PM */
|
| 1831 |
|
|
|
| 1832 |
|
|
/*********************************************************/
|
| 1833 |
|
|
|
| 1834 |
|
|
static struct pci_driver vlsi_irda_driver = {
|
| 1835 |
|
|
.name = drivername,
|
| 1836 |
|
|
.id_table = vlsi_irda_table,
|
| 1837 |
|
|
.probe = vlsi_irda_probe,
|
| 1838 |
|
|
.remove = __devexit_p(vlsi_irda_remove),
|
| 1839 |
|
|
#ifdef CONFIG_PM
|
| 1840 |
|
|
.suspend = vlsi_irda_suspend,
|
| 1841 |
|
|
.resume = vlsi_irda_resume,
|
| 1842 |
|
|
#endif
|
| 1843 |
|
|
};
|
| 1844 |
|
|
|
| 1845 |
|
|
#define PROC_DIR ("driver/" DRIVER_NAME)
|
| 1846 |
|
|
|
| 1847 |
|
|
static int __init vlsi_mod_init(void)
|
| 1848 |
|
|
{
|
| 1849 |
|
|
int i, ret;
|
| 1850 |
|
|
|
| 1851 |
|
|
if (clksrc < 0 || clksrc > 3) {
|
| 1852 |
|
|
IRDA_ERROR("%s: invalid clksrc=%d\n", drivername, clksrc);
|
| 1853 |
|
|
return -1;
|
| 1854 |
|
|
}
|
| 1855 |
|
|
|
| 1856 |
|
|
for (i = 0; i < 2; i++) {
|
| 1857 |
|
|
switch(ringsize[i]) {
|
| 1858 |
|
|
case 4:
|
| 1859 |
|
|
case 8:
|
| 1860 |
|
|
case 16:
|
| 1861 |
|
|
case 32:
|
| 1862 |
|
|
case 64:
|
| 1863 |
|
|
break;
|
| 1864 |
|
|
default:
|
| 1865 |
|
|
IRDA_WARNING("%s: invalid %s ringsize %d, using default=8", drivername, (i)?"rx":"tx", ringsize[i]);
|
| 1866 |
|
|
ringsize[i] = 8;
|
| 1867 |
|
|
break;
|
| 1868 |
|
|
}
|
| 1869 |
|
|
}
|
| 1870 |
|
|
|
| 1871 |
|
|
sirpulse = !!sirpulse;
|
| 1872 |
|
|
|
| 1873 |
|
|
/* proc_mkdir returns NULL if !CONFIG_PROC_FS.
|
| 1874 |
|
|
* Failure to create the procfs entry is handled like running
|
| 1875 |
|
|
* without procfs - it's not required for the driver to work.
|
| 1876 |
|
|
*/
|
| 1877 |
|
|
vlsi_proc_root = proc_mkdir(PROC_DIR, NULL);
|
| 1878 |
|
|
if (vlsi_proc_root) {
|
| 1879 |
|
|
/* protect registered procdir against module removal.
|
| 1880 |
|
|
* Because we are in the module init path there's no race
|
| 1881 |
|
|
* window after create_proc_entry (and no barrier needed).
|
| 1882 |
|
|
*/
|
| 1883 |
|
|
vlsi_proc_root->owner = THIS_MODULE;
|
| 1884 |
|
|
}
|
| 1885 |
|
|
|
| 1886 |
|
|
ret = pci_register_driver(&vlsi_irda_driver);
|
| 1887 |
|
|
|
| 1888 |
|
|
if (ret && vlsi_proc_root)
|
| 1889 |
|
|
remove_proc_entry(PROC_DIR, NULL);
|
| 1890 |
|
|
return ret;
|
| 1891 |
|
|
|
| 1892 |
|
|
}
|
| 1893 |
|
|
|
| 1894 |
|
|
static void __exit vlsi_mod_exit(void)
|
| 1895 |
|
|
{
|
| 1896 |
|
|
pci_unregister_driver(&vlsi_irda_driver);
|
| 1897 |
|
|
if (vlsi_proc_root)
|
| 1898 |
|
|
remove_proc_entry(PROC_DIR, NULL);
|
| 1899 |
|
|
}
|
| 1900 |
|
|
|
| 1901 |
|
|
module_init(vlsi_mod_init);
|
| 1902 |
|
|
module_exit(vlsi_mod_exit);
|
