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donauboe.c
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/*****************************************************************
*
* Filename: donauboe.c
* Version: 2.17
* Description: Driver for the Toshiba OBOE (or type-O or 701)
* FIR Chipset, also supports the DONAUOBOE (type-DO
* or d01) FIR chipset which as far as I know is
* register compatible.
* Documentation: http://libxg.free.fr/irda/lib-irda.html
* Status: Experimental.
* Author: James McKenzie <[email protected]>
* Created at: Sat May 8 12:35:27 1999
* Modified: Paul Bristow <[email protected]>
* Modified: Mon Nov 11 19:10:05 1999
* Modified: James McKenzie <[email protected]>
* Modified: Thu Mar 16 12:49:00 2000 (Substantial rewrite)
* Modified: Sat Apr 29 00:23:03 2000 (Added DONAUOBOE support)
* Modified: Wed May 24 23:45:02 2000 (Fixed chipio_t structure)
* Modified: 2.13 Christian Gennerat <[email protected]>
* Modified: 2.13 dim jan 07 21:57:39 2001 (tested with kernel 2.4 & irnet/ppp)
* Modified: 2.14 Christian Gennerat <[email protected]>
* Modified: 2.14 lun fev 05 17:55:59 2001 (adapted to patch-2.4.1-pre8-irda1)
* Modified: 2.15 Martin Lucina <[email protected]>
* Modified: 2.15 Fri Jun 21 20:40:59 2002 (sync with 2.4.18, substantial fixes)
* Modified: 2.16 Martin Lucina <[email protected]>
* Modified: 2.16 Sat Jun 22 18:54:29 2002 (fix freeregion, default to verbose)
* Modified: 2.17 Christian Gennerat <[email protected]>
* Modified: 2.17 jeu sep 12 08:50:20 2002 (save_flags();cli(); replaced by spinlocks)
* Modified: 2.18 Christian Gennerat <[email protected]>
* Modified: 2.18 ven jan 10 03:14:16 2003 Change probe default options
*
* Copyright (c) 1999 James McKenzie, All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* Neither James McKenzie nor Cambridge University admit liability nor
* provide warranty for any of this software. This material is
* provided "AS-IS" and at no charge.
*
* Applicable Models : Libretto 100/110CT and many more.
* Toshiba refers to this chip as the type-O IR port,
* or the type-DO IR port.
*
********************************************************************/
/* Look at toshoboe.h (currently in include/net/irda) for details of */
/* Where to get documentation on the chip */
/* See below for a description of the logic in this driver */
/* User servicable parts */
/* USE_PROBE Create the code which probes the chip and does a few tests */
/* do_probe module parameter Enable this code */
/* Probe code is very useful for understanding how the hardware works */
/* Use it with various combinations of TT_LEN, RX_LEN */
/* Strongly recommended, disable if the probe fails on your machine */
/* and send me <[email protected]> the output of dmesg */
#define USE_PROBE 1
#undef USE_PROBE
/* Trace Transmit ring, interrupts, Receive ring or not ? */
#define PROBE_VERBOSE 1
/* Debug option, examine sent and received raw data */
/* Irdadump is better, but does not see all packets. enable it if you want. */
#undef DUMP_PACKETS
/* MIR mode has not been tested. Some behaviour is different */
/* Seems to work against an Ericsson R520 for me. -Martin */
#define USE_MIR
/* Schedule back to back hardware transmits wherever possible, otherwise */
/* we need an interrupt for every frame, unset if oboe works for a bit and */
/* then hangs */
#define OPTIMIZE_TX
/* Set the number of slots in the rings */
/* If you get rx/tx fifo overflows at high bitrates, you can try increasing */
/* these */
#define RING_SIZE (OBOE_RING_SIZE_RX8 | OBOE_RING_SIZE_TX8)
#define TX_SLOTS 8
#define RX_SLOTS 8
/* Less user servicable parts below here */
/* Test, Transmit and receive buffer sizes, adjust at your peril */
/* remarks: nfs usually needs 1k blocks */
/* remarks: in SIR mode, CRC is received, -> RX_LEN=TX_LEN+2 */
/* remarks: test accepts large blocks. Standard is 0x80 */
/* When TT_LEN > RX_LEN (SIR mode) data is stored in successive slots. */
/* When 3 or more slots are needed for each test packet, */
/* data received in the first slots is overwritten, even */
/* if OBOE_CTL_RX_HW_OWNS is not set, without any error! */
#define TT_LEN 0x80
#define TX_LEN 0xc00
#define RX_LEN 0xc04
/* Real transmitted length (SIR mode) is about 14+(2%*TX_LEN) more */
/* long than user-defined length (see async_wrap_skb) and is less then 4K */
/* Real received length is (max RX_LEN) differs from user-defined */
/* length only b the CRC (2 or 4 bytes) */
#define BUF_SAFETY 0x7a
#define RX_BUF_SZ (RX_LEN)
#define TX_BUF_SZ (TX_LEN+BUF_SAFETY)
/* Logic of the netdev part of this driver */
/* The RX ring is filled with buffers, when a packet arrives */
/* it is DMA'd into the buffer which is marked used and RxDone called */
/* RxDone forms an skb (and checks the CRC if in SIR mode) and ships */
/* the packet off upstairs */
/* The transmitter on the oboe chip can work in one of two modes */
/* for each ring->tx[] the transmitter can either */
/* a) transmit the packet, leave the trasmitter enabled and proceed to */
/* the next ring */
/* OR */
/* b) transmit the packet, switch off the transmitter and issue TxDone */
/* All packets are entered into the ring in mode b), if the ring was */
/* empty the transmitter is started. */
/* If OPTIMIZE_TX is defined then in TxDone if the ring contains */
/* more than one packet, all but the last are set to mode a) [HOWEVER */
/* the hardware may not notice this, this is why we start in mode b) ] */
/* then restart the transmitter */
/* If OPTIMIZE_TX is not defined then we just restart the transmitter */
/* if the ring isn't empty */
/* Speed changes are delayed until the TxRing is empty */
/* mtt is handled by generating packets with bad CRCs, before the data */
/* TODO: */
/* check the mtt works ok */
/* finish the watchdog */
/* No user servicable parts below here */
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/rtnetlink.h>
#include <asm/io.h>
#include <net/irda/wrapper.h>
#include <net/irda/irda.h>
//#include <net/irda/irmod.h>
//#include <net/irda/irlap_frame.h>
#include <net/irda/irda_device.h>
#include <net/irda/crc.h>
#include "donauboe.h"
#define INB(port) inb_p(port)
#define OUTB(val,port) outb_p(val,port)
#define OUTBP(val,port) outb_p(val,port)
#define PROMPT OUTB(OBOE_PROMPT_BIT,OBOE_PROMPT);
#if PROBE_VERBOSE
#define PROBE_DEBUG(args...) (printk (args))
#else
#define PROBE_DEBUG(args...) ;
#endif
/* Set the DMA to be byte at a time */
#define CONFIG0H_DMA_OFF OBOE_CONFIG0H_RCVANY
#define CONFIG0H_DMA_ON_NORX CONFIG0H_DMA_OFF| OBOE_CONFIG0H_ENDMAC
#define CONFIG0H_DMA_ON CONFIG0H_DMA_ON_NORX | OBOE_CONFIG0H_ENRX
static const struct pci_device_id toshoboe_pci_tbl[] = {
{ PCI_VENDOR_ID_TOSHIBA, PCI_DEVICE_ID_FIR701, PCI_ANY_ID, PCI_ANY_ID, },
{ PCI_VENDOR_ID_TOSHIBA, PCI_DEVICE_ID_FIRD01, PCI_ANY_ID, PCI_ANY_ID, },
{ } /* Terminating entry */
};
MODULE_DEVICE_TABLE(pci, toshoboe_pci_tbl);
#define DRIVER_NAME "toshoboe"
static char *driver_name = DRIVER_NAME;
static int max_baud = 4000000;
#ifdef USE_PROBE
static bool do_probe = false;
#endif
/**********************************************************************/
static int
toshoboe_checkfcs (unsigned char *buf, int len)
{
int i;
union
{
__u16 value;
__u8 bytes[2];
}
fcs;
fcs.value = INIT_FCS;
for (i = 0; i < len; ++i)
fcs.value = irda_fcs (fcs.value, *(buf++));
return fcs.value == GOOD_FCS;
}
/***********************************************************************/
/* Generic chip handling code */
#ifdef DUMP_PACKETS
static unsigned char dump[50];
static void
_dumpbufs (unsigned char *data, int len, char tete)
{
int i,j;
char head=tete;
for (i=0;i<len;i+=16) {
for (j=0;j<16 && i+j<len;j++) { sprintf(&dump[3*j],"%02x.",data[i+j]); }
dump [3*j]=0;
pr_debug("%c%s\n", head, dump);
head='+';
}
}
#endif
#ifdef USE_PROBE
/* Dump the registers */
static void
toshoboe_dumpregs (struct toshoboe_cb *self)
{
__u32 ringbase;
ringbase = INB (OBOE_RING_BASE0) << 10;
ringbase |= INB (OBOE_RING_BASE1) << 18;
ringbase |= INB (OBOE_RING_BASE2) << 26;
printk (KERN_ERR DRIVER_NAME ": Register dump:\n");
printk (KERN_ERR "Interrupts: Tx:%d Rx:%d TxUnder:%d RxOver:%d Sip:%d\n",
self->int_tx, self->int_rx, self->int_txunder, self->int_rxover,
self->int_sip);
printk (KERN_ERR "RX %02x TX %02x RingBase %08x\n",
INB (OBOE_RXSLOT), INB (OBOE_TXSLOT), ringbase);
printk (KERN_ERR "RING_SIZE %02x IER %02x ISR %02x\n",
INB (OBOE_RING_SIZE), INB (OBOE_IER), INB (OBOE_ISR));
printk (KERN_ERR "CONFIG1 %02x STATUS %02x\n",
INB (OBOE_CONFIG1), INB (OBOE_STATUS));
printk (KERN_ERR "CONFIG0 %02x%02x ENABLE %02x%02x\n",
INB (OBOE_CONFIG0H), INB (OBOE_CONFIG0L),
INB (OBOE_ENABLEH), INB (OBOE_ENABLEL));
printk (KERN_ERR "NEW_PCONFIG %02x%02x CURR_PCONFIG %02x%02x\n",
INB (OBOE_NEW_PCONFIGH), INB (OBOE_NEW_PCONFIGL),
INB (OBOE_CURR_PCONFIGH), INB (OBOE_CURR_PCONFIGL));
printk (KERN_ERR "MAXLEN %02x%02x RXCOUNT %02x%02x\n",
INB (OBOE_MAXLENH), INB (OBOE_MAXLENL),
INB (OBOE_RXCOUNTL), INB (OBOE_RXCOUNTH));
if (self->ring)
{
int i;
ringbase = virt_to_bus (self->ring);
printk (KERN_ERR "Ring at %08x:\n", ringbase);
printk (KERN_ERR "RX:");
for (i = 0; i < RX_SLOTS; ++i)
printk (" (%d,%02x)",self->ring->rx[i].len,self->ring->rx[i].control);
printk ("\n");
printk (KERN_ERR "TX:");
for (i = 0; i < RX_SLOTS; ++i)
printk (" (%d,%02x)",self->ring->tx[i].len,self->ring->tx[i].control);
printk ("\n");
}
}
#endif
/*Don't let the chip look at memory */
static void
toshoboe_disablebm (struct toshoboe_cb *self)
{
__u8 command;
pci_read_config_byte (self->pdev, PCI_COMMAND, &command);
command &= ~PCI_COMMAND_MASTER;
pci_write_config_byte (self->pdev, PCI_COMMAND, command);
}
/* Shutdown the chip and point the taskfile reg somewhere else */
static void
toshoboe_stopchip (struct toshoboe_cb *self)
{
/*Disable interrupts */
OUTB (0x0, OBOE_IER);
/*Disable DMA, Disable Rx, Disable Tx */
OUTB (CONFIG0H_DMA_OFF, OBOE_CONFIG0H);
/*Disable SIR MIR FIR, Tx and Rx */
OUTB (0x00, OBOE_ENABLEH);
/*Point the ring somewhere safe */
OUTB (0x3f, OBOE_RING_BASE2);
OUTB (0xff, OBOE_RING_BASE1);
OUTB (0xff, OBOE_RING_BASE0);
OUTB (RX_LEN >> 8, OBOE_MAXLENH);
OUTB (RX_LEN & 0xff, OBOE_MAXLENL);
/*Acknoledge any pending interrupts */
OUTB (0xff, OBOE_ISR);
/*Why */
OUTB (OBOE_ENABLEH_PHYANDCLOCK, OBOE_ENABLEH);
/*switch it off */
OUTB (OBOE_CONFIG1_OFF, OBOE_CONFIG1);
toshoboe_disablebm (self);
}
/* Transmitter initialization */
static void
toshoboe_start_DMA (struct toshoboe_cb *self, int opts)
{
OUTB (0x0, OBOE_ENABLEH);
OUTB (CONFIG0H_DMA_ON | opts, OBOE_CONFIG0H);
OUTB (OBOE_ENABLEH_PHYANDCLOCK, OBOE_ENABLEH);
PROMPT;
}
/*Set the baud rate */
static void
toshoboe_setbaud (struct toshoboe_cb *self)
{
__u16 pconfig = 0;
__u8 config0l = 0;
pr_debug("%s(%d/%d)\n", __func__, self->speed, self->io.speed);
switch (self->speed)
{
case 2400:
case 4800:
case 9600:
case 19200:
case 38400:
case 57600:
case 115200:
#ifdef USE_MIR
case 1152000:
#endif
case 4000000:
break;
default:
printk (KERN_ERR DRIVER_NAME ": switch to unsupported baudrate %d\n",
self->speed);
return;
}
switch (self->speed)
{
/* For SIR the preamble is done by adding XBOFs */
/* to the packet */
/* set to filtered SIR mode, filter looks for BOF and EOF */
case 2400:
pconfig |= 47 << OBOE_PCONFIG_BAUDSHIFT;
pconfig |= 25 << OBOE_PCONFIG_WIDTHSHIFT;
break;
case 4800:
pconfig |= 23 << OBOE_PCONFIG_BAUDSHIFT;
pconfig |= 25 << OBOE_PCONFIG_WIDTHSHIFT;
break;
case 9600:
pconfig |= 11 << OBOE_PCONFIG_BAUDSHIFT;
pconfig |= 25 << OBOE_PCONFIG_WIDTHSHIFT;
break;
case 19200:
pconfig |= 5 << OBOE_PCONFIG_BAUDSHIFT;
pconfig |= 25 << OBOE_PCONFIG_WIDTHSHIFT;
break;
case 38400:
pconfig |= 2 << OBOE_PCONFIG_BAUDSHIFT;
pconfig |= 25 << OBOE_PCONFIG_WIDTHSHIFT;
break;
case 57600:
pconfig |= 1 << OBOE_PCONFIG_BAUDSHIFT;
pconfig |= 25 << OBOE_PCONFIG_WIDTHSHIFT;
break;
case 115200:
pconfig |= 0 << OBOE_PCONFIG_BAUDSHIFT;
pconfig |= 25 << OBOE_PCONFIG_WIDTHSHIFT;
break;
default:
/*Set to packet based reception */
OUTB (RX_LEN >> 8, OBOE_MAXLENH);
OUTB (RX_LEN & 0xff, OBOE_MAXLENL);
break;
}
switch (self->speed)
{
case 2400:
case 4800:
case 9600:
case 19200:
case 38400:
case 57600:
case 115200:
config0l = OBOE_CONFIG0L_ENSIR;
if (self->async)
{
/*Set to character based reception */
/*System will lock if MAXLEN=0 */
/*so have to be careful */
OUTB (0x01, OBOE_MAXLENH);
OUTB (0x01, OBOE_MAXLENL);
OUTB (0x00, OBOE_MAXLENH);
}
else
{
/*Set to packet based reception */
config0l |= OBOE_CONFIG0L_ENSIRF;
OUTB (RX_LEN >> 8, OBOE_MAXLENH);
OUTB (RX_LEN & 0xff, OBOE_MAXLENL);
}
break;
#ifdef USE_MIR
/* MIR mode */
/* Set for 16 bit CRC and enable MIR */
/* Preamble now handled by the chip */
case 1152000:
pconfig |= 0 << OBOE_PCONFIG_BAUDSHIFT;
pconfig |= 8 << OBOE_PCONFIG_WIDTHSHIFT;
pconfig |= 1 << OBOE_PCONFIG_PREAMBLESHIFT;
config0l = OBOE_CONFIG0L_CRC16 | OBOE_CONFIG0L_ENMIR;
break;
#endif
/* FIR mode */
/* Set for 32 bit CRC and enable FIR */
/* Preamble handled by the chip */
case 4000000:
pconfig |= 0 << OBOE_PCONFIG_BAUDSHIFT;
/* Documentation says 14, but toshiba use 15 in their drivers */
pconfig |= 15 << OBOE_PCONFIG_PREAMBLESHIFT;
config0l = OBOE_CONFIG0L_ENFIR;
break;
}
/* Copy into new PHY config buffer */
OUTBP (pconfig >> 8, OBOE_NEW_PCONFIGH);
OUTB (pconfig & 0xff, OBOE_NEW_PCONFIGL);
OUTB (config0l, OBOE_CONFIG0L);
/* Now make OBOE copy from new PHY to current PHY */
OUTB (0x0, OBOE_ENABLEH);
OUTB (OBOE_ENABLEH_PHYANDCLOCK, OBOE_ENABLEH);
PROMPT;
/* speed change executed */
self->new_speed = 0;
self->io.speed = self->speed;
}
/*Let the chip look at memory */
static void
toshoboe_enablebm (struct toshoboe_cb *self)
{
pci_set_master (self->pdev);
}
/*setup the ring */
static void
toshoboe_initring (struct toshoboe_cb *self)
{
int i;
for (i = 0; i < TX_SLOTS; ++i)
{
self->ring->tx[i].len = 0;
self->ring->tx[i].control = 0x00;
self->ring->tx[i].address = virt_to_bus (self->tx_bufs[i]);
}
for (i = 0; i < RX_SLOTS; ++i)
{
self->ring->rx[i].len = RX_LEN;
self->ring->rx[i].len = 0;
self->ring->rx[i].address = virt_to_bus (self->rx_bufs[i]);
self->ring->rx[i].control = OBOE_CTL_RX_HW_OWNS;
}
}
static void
toshoboe_resetptrs (struct toshoboe_cb *self)
{
/* Can reset pointers by twidling DMA */
OUTB (0x0, OBOE_ENABLEH);
OUTBP (CONFIG0H_DMA_OFF, OBOE_CONFIG0H);
OUTB (OBOE_ENABLEH_PHYANDCLOCK, OBOE_ENABLEH);
self->rxs = inb_p (OBOE_RXSLOT) & OBOE_SLOT_MASK;
self->txs = inb_p (OBOE_TXSLOT) & OBOE_SLOT_MASK;
}
/* Called in locked state */
static void
toshoboe_initptrs (struct toshoboe_cb *self)
{
/* spin_lock_irqsave(self->spinlock, flags); */
/* save_flags (flags); */
/* Can reset pointers by twidling DMA */
toshoboe_resetptrs (self);
OUTB (0x0, OBOE_ENABLEH);
OUTB (CONFIG0H_DMA_ON, OBOE_CONFIG0H);
OUTB (OBOE_ENABLEH_PHYANDCLOCK, OBOE_ENABLEH);
self->txpending = 0;
/* spin_unlock_irqrestore(self->spinlock, flags); */
/* restore_flags (flags); */
}
/* Wake the chip up and get it looking at the rings */
/* Called in locked state */
static void
toshoboe_startchip (struct toshoboe_cb *self)
{
__u32 physaddr;
toshoboe_initring (self);
toshoboe_enablebm (self);
OUTBP (OBOE_CONFIG1_RESET, OBOE_CONFIG1);
OUTBP (OBOE_CONFIG1_ON, OBOE_CONFIG1);
/* Stop the clocks */
OUTB (0, OBOE_ENABLEH);
/*Set size of rings */
OUTB (RING_SIZE, OBOE_RING_SIZE);
/*Acknoledge any pending interrupts */
OUTB (0xff, OBOE_ISR);
/*Enable ints */
OUTB (OBOE_INT_TXDONE | OBOE_INT_RXDONE |
OBOE_INT_TXUNDER | OBOE_INT_RXOVER | OBOE_INT_SIP , OBOE_IER);
/*Acknoledge any pending interrupts */
OUTB (0xff, OBOE_ISR);
/*Set the maximum packet length to 0xfff (4095) */
OUTB (RX_LEN >> 8, OBOE_MAXLENH);
OUTB (RX_LEN & 0xff, OBOE_MAXLENL);
/*Shutdown DMA */
OUTB (CONFIG0H_DMA_OFF, OBOE_CONFIG0H);
/*Find out where the rings live */
physaddr = virt_to_bus (self->ring);
IRDA_ASSERT ((physaddr & 0x3ff) == 0,
printk (KERN_ERR DRIVER_NAME "ring not correctly aligned\n");
return;);
OUTB ((physaddr >> 10) & 0xff, OBOE_RING_BASE0);
OUTB ((physaddr >> 18) & 0xff, OBOE_RING_BASE1);
OUTB ((physaddr >> 26) & 0x3f, OBOE_RING_BASE2);
/*Enable DMA controller in byte mode and RX */
OUTB (CONFIG0H_DMA_ON, OBOE_CONFIG0H);
/* Start up the clocks */
OUTB (OBOE_ENABLEH_PHYANDCLOCK, OBOE_ENABLEH);
/*set to sensible speed */
self->speed = 9600;
toshoboe_setbaud (self);
toshoboe_initptrs (self);
}
static void
toshoboe_isntstuck (struct toshoboe_cb *self)
{
}
static void
toshoboe_checkstuck (struct toshoboe_cb *self)
{
unsigned long flags;
if (0)
{
spin_lock_irqsave(&self->spinlock, flags);
/* This will reset the chip completely */
printk (KERN_ERR DRIVER_NAME ": Resetting chip\n");
toshoboe_stopchip (self);
toshoboe_startchip (self);
spin_unlock_irqrestore(&self->spinlock, flags);
}
}
/*Generate packet of about mtt us long */
static int
toshoboe_makemttpacket (struct toshoboe_cb *self, void *buf, int mtt)
{
int xbofs;
xbofs = ((int) (mtt/100)) * (int) (self->speed);
xbofs=xbofs/80000; /*Eight bits per byte, and mtt is in us*/
xbofs++;
pr_debug(DRIVER_NAME ": generated mtt of %d bytes for %d us at %d baud\n",
xbofs, mtt, self->speed);
if (xbofs > TX_LEN)
{
printk (KERN_ERR DRIVER_NAME ": wanted %d bytes MTT but TX_LEN is %d\n",
xbofs, TX_LEN);
xbofs = TX_LEN;
}
/*xbofs will do for SIR, MIR and FIR,SIR mode doesn't generate a checksum anyway */
memset (buf, XBOF, xbofs);
return xbofs;
}
#ifdef USE_PROBE
/***********************************************************************/
/* Probe code */
static void
toshoboe_dumptx (struct toshoboe_cb *self)
{
int i;
PROBE_DEBUG(KERN_WARNING "TX:");
for (i = 0; i < RX_SLOTS; ++i)
PROBE_DEBUG(" (%d,%02x)",self->ring->tx[i].len,self->ring->tx[i].control);
PROBE_DEBUG(" [%d]\n",self->speed);
}
static void
toshoboe_dumprx (struct toshoboe_cb *self, int score)
{
int i;
PROBE_DEBUG(" %d\nRX:",score);
for (i = 0; i < RX_SLOTS; ++i)
PROBE_DEBUG(" (%d,%02x)",self->ring->rx[i].len,self->ring->rx[i].control);
PROBE_DEBUG("\n");
}
static inline int
stuff_byte (__u8 byte, __u8 * buf)
{
switch (byte)
{
case BOF: /* FALLTHROUGH */
case EOF: /* FALLTHROUGH */
case CE:
/* Insert transparently coded */
buf[0] = CE; /* Send link escape */
buf[1] = byte ^ IRDA_TRANS; /* Complement bit 5 */
return 2;
/* break; */
default:
/* Non-special value, no transparency required */
buf[0] = byte;
return 1;
/* break; */
}
}
static irqreturn_t
toshoboe_probeinterrupt (int irq, void *dev_id)
{
struct toshoboe_cb *self = dev_id;
__u8 irqstat;
irqstat = INB (OBOE_ISR);
/* was it us */
if (!(irqstat & OBOE_INT_MASK))
return IRQ_NONE;
/* Ack all the interrupts */
OUTB (irqstat, OBOE_ISR);
if (irqstat & OBOE_INT_TXDONE)
{
int txp;
self->int_tx++;
PROBE_DEBUG("T");
txp = INB (OBOE_TXSLOT) & OBOE_SLOT_MASK;
if (self->ring->tx[txp].control & OBOE_CTL_TX_HW_OWNS)
{
self->int_tx+=100;
PROBE_DEBUG("S");
toshoboe_start_DMA(self, OBOE_CONFIG0H_ENTX | OBOE_CONFIG0H_LOOP);
}
}
if (irqstat & OBOE_INT_RXDONE) {
self->int_rx++;
PROBE_DEBUG("R"); }
if (irqstat & OBOE_INT_TXUNDER) {
self->int_txunder++;
PROBE_DEBUG("U"); }
if (irqstat & OBOE_INT_RXOVER) {
self->int_rxover++;
PROBE_DEBUG("O"); }
if (irqstat & OBOE_INT_SIP) {
self->int_sip++;
PROBE_DEBUG("I"); }
return IRQ_HANDLED;
}
static int
toshoboe_maketestpacket (unsigned char *buf, int badcrc, int fir)
{
int i;
int len = 0;
union
{
__u16 value;
__u8 bytes[2];
}
fcs;
if (fir)
{
memset (buf, 0, TT_LEN);
return TT_LEN;
}
fcs.value = INIT_FCS;
memset (buf, XBOF, 10);
len += 10;
buf[len++] = BOF;
for (i = 0; i < TT_LEN; ++i)
{
len += stuff_byte (i, buf + len);
fcs.value = irda_fcs (fcs.value, i);
}
len += stuff_byte (fcs.bytes[0] ^ badcrc, buf + len);
len += stuff_byte (fcs.bytes[1] ^ badcrc, buf + len);
buf[len++] = EOF;
len++;
return len;
}
static int
toshoboe_probefail (struct toshoboe_cb *self, char *msg)
{
printk (KERN_ERR DRIVER_NAME "probe(%d) failed %s\n",self-> speed, msg);
toshoboe_dumpregs (self);
toshoboe_stopchip (self);
free_irq (self->io.irq, (void *) self);
return 0;
}
static int
toshoboe_numvalidrcvs (struct toshoboe_cb *self)
{
int i, ret = 0;
for (i = 0; i < RX_SLOTS; ++i)
if ((self->ring->rx[i].control & 0xe0) == 0)
ret++;
return ret;
}
static int
toshoboe_numrcvs (struct toshoboe_cb *self)
{
int i, ret = 0;
for (i = 0; i < RX_SLOTS; ++i)
if (!(self->ring->rx[i].control & OBOE_CTL_RX_HW_OWNS))
ret++;
return ret;
}
static int
toshoboe_probe (struct toshoboe_cb *self)
{
int i, j, n;
#ifdef USE_MIR
static const int bauds[] = { 9600, 115200, 4000000, 1152000 };
#else
static const int bauds[] = { 9600, 115200, 4000000 };
#endif
unsigned long flags;
if (request_irq (self->io.irq, toshoboe_probeinterrupt,
self->io.irqflags, "toshoboe", (void *) self))
{
printk (KERN_ERR DRIVER_NAME ": probe failed to allocate irq %d\n",
self->io.irq);
return 0;
}
/* test 1: SIR filter and back to back */
for (j = 0; j < ARRAY_SIZE(bauds); ++j)
{
int fir = (j > 1);
toshoboe_stopchip (self);
spin_lock_irqsave(&self->spinlock, flags);
/*Address is already setup */
toshoboe_startchip (self);
self->int_rx = self->int_tx = 0;
self->speed = bauds[j];
toshoboe_setbaud (self);
toshoboe_initptrs (self);
spin_unlock_irqrestore(&self->spinlock, flags);
self->ring->tx[self->txs].control =
/* (FIR only) OBOE_CTL_TX_SIP needed for switching to next slot */
/* MIR: all received data is stored in one slot */
(fir) ? OBOE_CTL_TX_HW_OWNS | OBOE_CTL_TX_RTCENTX
: OBOE_CTL_TX_HW_OWNS ;
self->ring->tx[self->txs].len =
toshoboe_maketestpacket (self->tx_bufs[self->txs], 0, fir);
self->txs++;
self->txs %= TX_SLOTS;
self->ring->tx[self->txs].control =
(fir) ? OBOE_CTL_TX_HW_OWNS | OBOE_CTL_TX_SIP
: OBOE_CTL_TX_HW_OWNS | OBOE_CTL_TX_RTCENTX ;
self->ring->tx[self->txs].len =
toshoboe_maketestpacket (self->tx_bufs[self->txs], 0, fir);
self->txs++;
self->txs %= TX_SLOTS;
self->ring->tx[self->txs].control =
(fir) ? OBOE_CTL_TX_HW_OWNS | OBOE_CTL_TX_RTCENTX
: OBOE_CTL_TX_HW_OWNS ;
self->ring->tx[self->txs].len =
toshoboe_maketestpacket (self->tx_bufs[self->txs], 0, fir);
self->txs++;
self->txs %= TX_SLOTS;
self->ring->tx[self->txs].control =
(fir) ? OBOE_CTL_TX_HW_OWNS | OBOE_CTL_TX_RTCENTX
| OBOE_CTL_TX_SIP | OBOE_CTL_TX_BAD_CRC
: OBOE_CTL_TX_HW_OWNS | OBOE_CTL_TX_RTCENTX ;
self->ring->tx[self->txs].len =
toshoboe_maketestpacket (self->tx_bufs[self->txs], 0, fir);
self->txs++;
self->txs %= TX_SLOTS;
toshoboe_dumptx (self);
/* Turn on TX and RX and loopback */
toshoboe_start_DMA(self, OBOE_CONFIG0H_ENTX | OBOE_CONFIG0H_LOOP);
i = 0;
n = fir ? 1 : 4;
while (toshoboe_numvalidrcvs (self) != n)
{
if (i > 4800)
return toshoboe_probefail (self, "filter test");
udelay ((9600*(TT_LEN+16))/self->speed);
i++;
}
n = fir ? 203 : 102;
while ((toshoboe_numrcvs(self) != self->int_rx) || (self->int_tx != n))
{
if (i > 4800)
return toshoboe_probefail (self, "interrupt test");
udelay ((9600*(TT_LEN+16))/self->speed);
i++;
}
toshoboe_dumprx (self,i);
}
/* test 2: SIR in char at a time */
toshoboe_stopchip (self);
self->int_rx = self->int_tx = 0;
spin_lock_irqsave(&self->spinlock, flags);
toshoboe_startchip (self);
spin_unlock_irqrestore(&self->spinlock, flags);
self->async = 1;
self->speed = 115200;
toshoboe_setbaud (self);
self->ring->tx[self->txs].control =
OBOE_CTL_TX_RTCENTX | OBOE_CTL_TX_HW_OWNS;
self->ring->tx[self->txs].len = 4;
((unsigned char *) self->tx_bufs[self->txs])[0] = 'f';
((unsigned char *) self->tx_bufs[self->txs])[1] = 'i';
((unsigned char *) self->tx_bufs[self->txs])[2] = 's';
((unsigned char *) self->tx_bufs[self->txs])[3] = 'h';
toshoboe_dumptx (self);
toshoboe_start_DMA(self, OBOE_CONFIG0H_ENTX | OBOE_CONFIG0H_LOOP);
i = 0;
while (toshoboe_numvalidrcvs (self) != 4)
{
if (i > 100)
return toshoboe_probefail (self, "Async test");
udelay (100);
i++;
}
while ((toshoboe_numrcvs (self) != self->int_rx) || (self->int_tx != 1))
{
if (i > 100)
return toshoboe_probefail (self, "Async interrupt test");
udelay (100);
i++;
}
toshoboe_dumprx (self,i);
self->async = 0;
self->speed = 9600;
toshoboe_setbaud (self);
toshoboe_stopchip (self);
free_irq (self->io.irq, (void *) self);
printk (KERN_WARNING DRIVER_NAME ": Self test passed ok\n");
return 1;
}
#endif
/******************************************************************/
/* Netdev style code */
/* Transmit something */
static netdev_tx_t
toshoboe_hard_xmit (struct sk_buff *skb, struct net_device *dev)
{
struct toshoboe_cb *self;
__s32 speed;
int mtt, len, ctl;
unsigned long flags;
struct irda_skb_cb *cb = (struct irda_skb_cb *) skb->cb;
self = netdev_priv(dev);
IRDA_ASSERT (self != NULL, return NETDEV_TX_OK; );
pr_debug("%s.tx:%x(%x)%x\n",
__func__, skb->len, self->txpending, INB(OBOE_ENABLEH));
if (!cb->magic) {
pr_debug("%s.Not IrLAP:%x\n", __func__, cb->magic);
#ifdef DUMP_PACKETS
_dumpbufs(skb->data,skb->len,'>');
#endif
}
/* change speed pending, wait for its execution */
if (self->new_speed)
return NETDEV_TX_BUSY;
/* device stopped (apm) wait for restart */
if (self->stopped)
return NETDEV_TX_BUSY;
toshoboe_checkstuck (self);
/* Check if we need to change the speed */
/* But not now. Wait after transmission if mtt not required */
speed=irda_get_next_speed(skb);
if ((speed != self->io.speed) && (speed != -1))
{
spin_lock_irqsave(&self->spinlock, flags);
if (self->txpending || skb->len)
{
self->new_speed = speed;