mirror of https://gitee.com/openkylin/linux.git
1893 lines
51 KiB
C
1893 lines
51 KiB
C
/*********************************************************************
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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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__func__, 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", __func__,
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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: ", __func__, 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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__func__, (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 = netdev_priv(ndev);
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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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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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(word&IRCFG_LOOP) ? " LOOP" : "",
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(word&IRCFG_ENTX) ? " ENTX" : "",
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(word&IRCFG_ENRX) ? " ENRX" : "",
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(word&IRCFG_MSTR) ? " MSTR" : "",
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(word&IRCFG_RXANY) ? " RXANY" : "",
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(word&IRCFG_CRC16) ? " CRC16" : "",
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(word&IRCFG_FIR) ? " FIR" : "",
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(word&IRCFG_MIR) ? " MIR" : "",
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(word&IRCFG_SIR) ? " SIR" : "",
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(word&IRCFG_SIRFILT) ? " SIRFILT" : "",
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(word&IRCFG_SIRTEST) ? " SIRTEST" : "",
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(word&IRCFG_TXPOL) ? " TXPOL" : "",
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(word&IRCFG_RXPOL) ? " RXPOL" : "");
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word = inw(iobase+VLSI_PIO_IRENABLE);
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seq_printf(seq, "IRENABLE:%s%s%s%s%s%s%s%s\n",
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(word&IRENABLE_PHYANDCLOCK) ? " PHYANDCLOCK" : "",
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(word&IRENABLE_CFGER) ? " CFGERR" : "",
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(word&IRENABLE_FIR_ON) ? " FIR_ON" : "",
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(word&IRENABLE_MIR_ON) ? " MIR_ON" : "",
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(word&IRENABLE_SIR_ON) ? " SIR_ON" : "",
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(word&IRENABLE_ENTXST) ? " ENTXST" : "",
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(word&IRENABLE_ENRXST) ? " ENRXST" : "",
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(word&IRENABLE_CRC16_ON) ? " CRC16_ON" : "");
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word = inw(iobase+VLSI_PIO_PHYCTL);
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seq_printf(seq, "PHYCTL: baud-divisor=%u / pulsewidth=%u / preamble=%u\n",
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(unsigned)PHYCTL_TO_BAUD(word),
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(unsigned)PHYCTL_TO_PLSWID(word),
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(unsigned)PHYCTL_TO_PREAMB(word));
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word = inw(iobase+VLSI_PIO_NPHYCTL);
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seq_printf(seq, "NPHYCTL: baud-divisor=%u / pulsewidth=%u / preamble=%u\n",
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(unsigned)PHYCTL_TO_BAUD(word),
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(unsigned)PHYCTL_TO_PLSWID(word),
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(unsigned)PHYCTL_TO_PREAMB(word));
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word = inw(iobase+VLSI_PIO_MAXPKT);
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seq_printf(seq, "MAXPKT: max. rx packet size = %u\n", word);
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word = inw(iobase+VLSI_PIO_RCVBCNT) & RCVBCNT_MASK;
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seq_printf(seq, "RCVBCNT: rx-fifo filling level = %u\n", word);
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seq_printf(seq, "\nsw-state:\n");
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seq_printf(seq, "IrPHY setup: %d baud - %s encoding\n", idev->baud,
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(idev->mode==IFF_SIR)?"SIR":((idev->mode==IFF_MIR)?"MIR":"FIR"));
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do_gettimeofday(&now);
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if (now.tv_usec >= idev->last_rx.tv_usec) {
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delta2 = now.tv_usec - idev->last_rx.tv_usec;
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delta1 = 0;
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}
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else {
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delta2 = 1000000 + now.tv_usec - idev->last_rx.tv_usec;
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delta1 = 1;
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}
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seq_printf(seq, "last rx: %lu.%06u sec\n",
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now.tv_sec - idev->last_rx.tv_sec - delta1, delta2);
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seq_printf(seq, "RX: packets=%lu / bytes=%lu / errors=%lu / dropped=%lu",
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ndev->stats.rx_packets, ndev->stats.rx_bytes, ndev->stats.rx_errors,
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ndev->stats.rx_dropped);
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seq_printf(seq, " / overrun=%lu / length=%lu / frame=%lu / crc=%lu\n",
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ndev->stats.rx_over_errors, ndev->stats.rx_length_errors,
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ndev->stats.rx_frame_errors, ndev->stats.rx_crc_errors);
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seq_printf(seq, "TX: packets=%lu / bytes=%lu / errors=%lu / dropped=%lu / fifo=%lu\n",
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ndev->stats.tx_packets, ndev->stats.tx_bytes, ndev->stats.tx_errors,
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ndev->stats.tx_dropped, ndev->stats.tx_fifo_errors);
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}
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static void vlsi_proc_ring(struct seq_file *seq, struct vlsi_ring *r)
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{
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struct ring_descr *rd;
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unsigned i, j;
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int h, t;
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seq_printf(seq, "size %u / mask 0x%04x / len %u / dir %d / hw %p\n",
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r->size, r->mask, r->len, r->dir, r->rd[0].hw);
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h = atomic_read(&r->head) & r->mask;
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t = atomic_read(&r->tail) & r->mask;
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seq_printf(seq, "head = %d / tail = %d ", h, t);
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if (h == t)
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seq_printf(seq, "(empty)\n");
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else {
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if (((t+1)&r->mask) == h)
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seq_printf(seq, "(full)\n");
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else
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seq_printf(seq, "(level = %d)\n", ((unsigned)(t-h) & r->mask));
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rd = &r->rd[h];
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j = (unsigned) rd_get_count(rd);
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seq_printf(seq, "current: rd = %d / status = %02x / len = %u\n",
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h, (unsigned)rd_get_status(rd), j);
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if (j > 0) {
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seq_printf(seq, " data:");
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if (j > 20)
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j = 20;
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for (i = 0; i < j; i++)
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seq_printf(seq, " %02x", (unsigned)((unsigned char *)rd->buf)[i]);
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seq_printf(seq, "\n");
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}
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}
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for (i = 0; i < r->size; i++) {
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rd = &r->rd[i];
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seq_printf(seq, "> ring descr %u: ", i);
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seq_printf(seq, "skb=%p data=%p hw=%p\n", rd->skb, rd->buf, rd->hw);
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seq_printf(seq, " hw: status=%02x count=%u busaddr=0x%08x\n",
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(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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static int vlsi_seq_show(struct seq_file *seq, void *v)
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{
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struct net_device *ndev = seq->private;
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vlsi_irda_dev_t *idev = netdev_priv(ndev);
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unsigned long flags;
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seq_printf(seq, "\n%s %s\n\n", DRIVER_NAME, DRIVER_VERSION);
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seq_printf(seq, "clksrc: %s\n",
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(clksrc>=2) ? ((clksrc==3)?"40MHz XCLK":"48MHz XCLK")
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: ((clksrc==1)?"48MHz PLL":"autodetect"));
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seq_printf(seq, "ringsize: tx=%d / rx=%d\n",
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ringsize[0], ringsize[1]);
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seq_printf(seq, "sirpulse: %s\n", (sirpulse)?"3/16 bittime":"short");
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seq_printf(seq, "qos_mtt_bits: 0x%02x\n", (unsigned)qos_mtt_bits);
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spin_lock_irqsave(&idev->lock, flags);
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if (idev->pdev != NULL) {
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vlsi_proc_pdev(seq, idev->pdev);
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if (idev->pdev->current_state == 0)
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vlsi_proc_ndev(seq, ndev);
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else
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seq_printf(seq, "\nPCI controller down - resume_ok = %d\n",
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idev->resume_ok);
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if (netif_running(ndev) && idev->rx_ring && idev->tx_ring) {
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seq_printf(seq, "\n--------- RX ring -----------\n\n");
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vlsi_proc_ring(seq, idev->rx_ring);
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seq_printf(seq, "\n--------- TX ring -----------\n\n");
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vlsi_proc_ring(seq, idev->tx_ring);
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}
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}
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seq_printf(seq, "\n");
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spin_unlock_irqrestore(&idev->lock, flags);
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return 0;
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}
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static int vlsi_seq_open(struct inode *inode, struct file *file)
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{
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return single_open(file, vlsi_seq_show, PDE(inode)->data);
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}
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static const struct file_operations vlsi_proc_fops = {
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.owner = THIS_MODULE,
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.open = vlsi_seq_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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#define VLSI_PROC_FOPS (&vlsi_proc_fops)
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|
|
#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_alloc_consistent(idev->pdev, HW_RING_AREA_SIZE, &idev->busaddr);
|
|
if (!ringarea) {
|
|
IRDA_ERROR("%s: insufficient memory for descriptor rings\n",
|
|
__func__);
|
|
goto out;
|
|
}
|
|
memset(ringarea, 0, HW_RING_AREA_SIZE);
|
|
|
|
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 = (struct net_device *)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);
|
|
}
|
|
ndev->trans_start = jiffies;
|
|
|
|
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 __devinit
|
|
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 {
|
|
ent->size = 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:
|
|
pci_set_drvdata(pdev, NULL);
|
|
return -ENODEV;
|
|
}
|
|
|
|
static void __devexit 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);
|
|
|
|
pci_set_drvdata(pdev, NULL);
|
|
|
|
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 = __devexit_p(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);
|