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kernel_optimize_test/drivers/net/irda/via-ircc.c
Arnaldo Carvalho de Melo 27d7ff46a3 [SK_BUFF]: Introduce skb_copy_to_linear_data{_offset} 
To clearly state the intent of copying to linear sk_buffs, _offset being a
overly long variant but interesting for the sake of saving some bytes.

Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
2007-04-25 22:28:29 -07:00

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/********************************************************************
Filename: via-ircc.c
Version: 1.0
Description: Driver for the VIA VT8231/VT8233 IrDA chipsets
Author: VIA Technologies,inc
Date : 08/06/2003
Copyright (c) 1998-2003 VIA Technologies, Inc.
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, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTIES OR REPRESENTATIONS; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program; if not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
F01 Oct/02/02: Modify code for V0.11(move out back to back transfer)
F02 Oct/28/02: Add SB device ID for 3147 and 3177.
Comment :
jul/09/2002 : only implement two kind of dongle currently.
Oct/02/2002 : work on VT8231 and VT8233 .
Aug/06/2003 : change driver format to pci driver .
2004-02-16: <sda@bdit.de>
- Removed unneeded 'legacy' pci stuff.
- Make sure SIR mode is set (hw_init()) before calling mode-dependant stuff.
- On speed change from core, don't send SIR frame with new speed.
Use current speed and change speeds later.
- Make module-param dongle_id actually work.
- New dongle_id 17 (0x11): TDFS4500. Single-ended SIR only.
Tested with home-grown PCB on EPIA boards.
- Code cleanup.
********************************************************************/
#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/rtnetlink.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/byteorder.h>
#include <linux/pm.h>
#include <net/irda/wrapper.h>
#include <net/irda/irda.h>
#include <net/irda/irda_device.h>
#include "via-ircc.h"
#define VIA_MODULE_NAME "via-ircc"
#define CHIP_IO_EXTENT 0x40
static char *driver_name = VIA_MODULE_NAME;
/* Module parameters */
static int qos_mtt_bits = 0x07; /* 1 ms or more */
static int dongle_id = 0; /* default: probe */
/* We can't guess the type of connected dongle, user *must* supply it. */
module_param(dongle_id, int, 0);
/* FIXME : we should not need this, because instances should be automatically
* managed by the PCI layer. Especially that we seem to only be using the
* first entry. Jean II */
/* Max 4 instances for now */
static struct via_ircc_cb *dev_self[] = { NULL, NULL, NULL, NULL };
/* Some prototypes */
static int via_ircc_open(int i, chipio_t * info, unsigned int id);
static int via_ircc_close(struct via_ircc_cb *self);
static int via_ircc_dma_receive(struct via_ircc_cb *self);
static int via_ircc_dma_receive_complete(struct via_ircc_cb *self,
int iobase);
static int via_ircc_hard_xmit_sir(struct sk_buff *skb,
struct net_device *dev);
static int via_ircc_hard_xmit_fir(struct sk_buff *skb,
struct net_device *dev);
static void via_hw_init(struct via_ircc_cb *self);
static void via_ircc_change_speed(struct via_ircc_cb *self, __u32 baud);
static irqreturn_t via_ircc_interrupt(int irq, void *dev_id);
static int via_ircc_is_receiving(struct via_ircc_cb *self);
static int via_ircc_read_dongle_id(int iobase);
static int via_ircc_net_open(struct net_device *dev);
static int via_ircc_net_close(struct net_device *dev);
static int via_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq,
int cmd);
static struct net_device_stats *via_ircc_net_get_stats(struct net_device
*dev);
static void via_ircc_change_dongle_speed(int iobase, int speed,
int dongle_id);
static int RxTimerHandler(struct via_ircc_cb *self, int iobase);
static void hwreset(struct via_ircc_cb *self);
static int via_ircc_dma_xmit(struct via_ircc_cb *self, u16 iobase);
static int upload_rxdata(struct via_ircc_cb *self, int iobase);
static int __devinit via_init_one (struct pci_dev *pcidev, const struct pci_device_id *id);
static void __devexit via_remove_one (struct pci_dev *pdev);
/* FIXME : Should use udelay() instead, even if we are x86 only - Jean II */
static void iodelay(int udelay)
{
u8 data;
int i;
for (i = 0; i < udelay; i++) {
data = inb(0x80);
}
}
static struct pci_device_id via_pci_tbl[] = {
{ PCI_VENDOR_ID_VIA, 0x8231, PCI_ANY_ID, PCI_ANY_ID,0,0,0 },
{ PCI_VENDOR_ID_VIA, 0x3109, PCI_ANY_ID, PCI_ANY_ID,0,0,1 },
{ PCI_VENDOR_ID_VIA, 0x3074, PCI_ANY_ID, PCI_ANY_ID,0,0,2 },
{ PCI_VENDOR_ID_VIA, 0x3147, PCI_ANY_ID, PCI_ANY_ID,0,0,3 },
{ PCI_VENDOR_ID_VIA, 0x3177, PCI_ANY_ID, PCI_ANY_ID,0,0,4 },
{ 0, }
};
MODULE_DEVICE_TABLE(pci,via_pci_tbl);
static struct pci_driver via_driver = {
.name = VIA_MODULE_NAME,
.id_table = via_pci_tbl,
.probe = via_init_one,
.remove = __devexit_p(via_remove_one),
};
/*
* Function via_ircc_init ()
*
* Initialize chip. Just find out chip type and resource.
*/
static int __init via_ircc_init(void)
{
int rc;
IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
rc = pci_register_driver(&via_driver);
if (rc < 0) {
IRDA_DEBUG(0, "%s(): error rc = %d, returning -ENODEV...\n",
__FUNCTION__, rc);
return -ENODEV;
}
return 0;
}
static int __devinit via_init_one (struct pci_dev *pcidev, const struct pci_device_id *id)
{
int rc;
u8 temp,oldPCI_40,oldPCI_44,bTmp,bTmp1;
u16 Chipset,FirDRQ1,FirDRQ0,FirIRQ,FirIOBase;
chipio_t info;
IRDA_DEBUG(2, "%s(): Device ID=(0X%X)\n", __FUNCTION__, id->device);
rc = pci_enable_device (pcidev);
if (rc) {
IRDA_DEBUG(0, "%s(): error rc = %d\n", __FUNCTION__, rc);
return -ENODEV;
}
// South Bridge exist
if ( ReadLPCReg(0x20) != 0x3C )
Chipset=0x3096;
else
Chipset=0x3076;
if (Chipset==0x3076) {
IRDA_DEBUG(2, "%s(): Chipset = 3076\n", __FUNCTION__);
WriteLPCReg(7,0x0c );
temp=ReadLPCReg(0x30);//check if BIOS Enable Fir
if((temp&0x01)==1) { // BIOS close or no FIR
WriteLPCReg(0x1d, 0x82 );
WriteLPCReg(0x23,0x18);
temp=ReadLPCReg(0xF0);
if((temp&0x01)==0) {
temp=(ReadLPCReg(0x74)&0x03); //DMA
FirDRQ0=temp + 4;
temp=(ReadLPCReg(0x74)&0x0C) >> 2;
FirDRQ1=temp + 4;
} else {
temp=(ReadLPCReg(0x74)&0x0C) >> 2; //DMA
FirDRQ0=temp + 4;
FirDRQ1=FirDRQ0;
}
FirIRQ=(ReadLPCReg(0x70)&0x0f); //IRQ
FirIOBase=ReadLPCReg(0x60 ) << 8; //IO Space :high byte
FirIOBase=FirIOBase| ReadLPCReg(0x61) ; //low byte
FirIOBase=FirIOBase ;
info.fir_base=FirIOBase;
info.irq=FirIRQ;
info.dma=FirDRQ1;
info.dma2=FirDRQ0;
pci_read_config_byte(pcidev,0x40,&bTmp);
pci_write_config_byte(pcidev,0x40,((bTmp | 0x08) & 0xfe));
pci_read_config_byte(pcidev,0x42,&bTmp);
pci_write_config_byte(pcidev,0x42,(bTmp | 0xf0));
pci_write_config_byte(pcidev,0x5a,0xc0);
WriteLPCReg(0x28, 0x70 );
if (via_ircc_open(0, &info,0x3076) == 0)
rc=0;
} else
rc = -ENODEV; //IR not turn on
} else { //Not VT1211
IRDA_DEBUG(2, "%s(): Chipset = 3096\n", __FUNCTION__);
pci_read_config_byte(pcidev,0x67,&bTmp);//check if BIOS Enable Fir
if((bTmp&0x01)==1) { // BIOS enable FIR
//Enable Double DMA clock
pci_read_config_byte(pcidev,0x42,&oldPCI_40);
pci_write_config_byte(pcidev,0x42,oldPCI_40 | 0x80);
pci_read_config_byte(pcidev,0x40,&oldPCI_40);
pci_write_config_byte(pcidev,0x40,oldPCI_40 & 0xf7);
pci_read_config_byte(pcidev,0x44,&oldPCI_44);
pci_write_config_byte(pcidev,0x44,0x4e);
//---------- read configuration from Function0 of south bridge
if((bTmp&0x02)==0) {
pci_read_config_byte(pcidev,0x44,&bTmp1); //DMA
FirDRQ0 = (bTmp1 & 0x30) >> 4;
pci_read_config_byte(pcidev,0x44,&bTmp1);
FirDRQ1 = (bTmp1 & 0xc0) >> 6;
} else {
pci_read_config_byte(pcidev,0x44,&bTmp1); //DMA
FirDRQ0 = (bTmp1 & 0x30) >> 4 ;
FirDRQ1=0;
}
pci_read_config_byte(pcidev,0x47,&bTmp1); //IRQ
FirIRQ = bTmp1 & 0x0f;
pci_read_config_byte(pcidev,0x69,&bTmp);
FirIOBase = bTmp << 8;//hight byte
pci_read_config_byte(pcidev,0x68,&bTmp);
FirIOBase = (FirIOBase | bTmp ) & 0xfff0;
//-------------------------
info.fir_base=FirIOBase;
info.irq=FirIRQ;
info.dma=FirDRQ1;
info.dma2=FirDRQ0;
if (via_ircc_open(0, &info,0x3096) == 0)
rc=0;
} else
rc = -ENODEV; //IR not turn on !!!!!
}//Not VT1211
IRDA_DEBUG(2, "%s(): End - rc = %d\n", __FUNCTION__, rc);
return rc;
}
/*
* Function via_ircc_clean ()
*
* Close all configured chips
*
*/
static void via_ircc_clean(void)
{
int i;
IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
for (i=0; i < ARRAY_SIZE(dev_self); i++) {
if (dev_self[i])
via_ircc_close(dev_self[i]);
}
}
static void __devexit via_remove_one (struct pci_dev *pdev)
{
IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
/* FIXME : This is ugly. We should use pci_get_drvdata(pdev);
* to get our driver instance and call directly via_ircc_close().
* See vlsi_ir for details...
* Jean II */
via_ircc_clean();
/* FIXME : This should be in via_ircc_close(), because here we may
* theoritically disable still configured devices :-( - Jean II */
pci_disable_device(pdev);
}
static void __exit via_ircc_cleanup(void)
{
IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
/* FIXME : This should be redundant, as pci_unregister_driver()
* should call via_remove_one() on each device.
* Jean II */
via_ircc_clean();
/* Cleanup all instances of the driver */
pci_unregister_driver (&via_driver);
}
/*
* Function via_ircc_open (iobase, irq)
*
* Open driver instance
*
*/
static __devinit int via_ircc_open(int i, chipio_t * info, unsigned int id)
{
struct net_device *dev;
struct via_ircc_cb *self;
int err;
IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
if (i >= ARRAY_SIZE(dev_self))
return -ENOMEM;
/* Allocate new instance of the driver */
dev = alloc_irdadev(sizeof(struct via_ircc_cb));
if (dev == NULL)
return -ENOMEM;
self = dev->priv;
self->netdev = dev;
spin_lock_init(&self->lock);
/* FIXME : We should store our driver instance in the PCI layer,
* using pci_set_drvdata(), not in this array.
* See vlsi_ir for details... - Jean II */
/* FIXME : 'i' is always 0 (see via_init_one()) :-( - Jean II */
/* Need to store self somewhere */
dev_self[i] = self;
self->index = i;
/* Initialize Resource */
self->io.cfg_base = info->cfg_base;
self->io.fir_base = info->fir_base;
self->io.irq = info->irq;
self->io.fir_ext = CHIP_IO_EXTENT;
self->io.dma = info->dma;
self->io.dma2 = info->dma2;
self->io.fifo_size = 32;
self->chip_id = id;
self->st_fifo.len = 0;
self->RxDataReady = 0;
/* Reserve the ioports that we need */
if (!request_region(self->io.fir_base, self->io.fir_ext, driver_name)) {
IRDA_DEBUG(0, "%s(), can't get iobase of 0x%03x\n",
__FUNCTION__, self->io.fir_base);
err = -ENODEV;
goto err_out1;
}
/* Initialize QoS for this device */
irda_init_max_qos_capabilies(&self->qos);
/* Check if user has supplied the dongle id or not */
if (!dongle_id)
dongle_id = via_ircc_read_dongle_id(self->io.fir_base);
self->io.dongle_id = dongle_id;
/* The only value we must override it the baudrate */
/* Maximum speeds and capabilities are dongle-dependant. */
switch( self->io.dongle_id ){
case 0x0d:
self->qos.baud_rate.bits =
IR_9600 | IR_19200 | IR_38400 | IR_57600 | IR_115200 |
IR_576000 | IR_1152000 | (IR_4000000 << 8);
break;
default:
self->qos.baud_rate.bits =
IR_9600 | IR_19200 | IR_38400 | IR_57600 | IR_115200;
break;
}
/* Following was used for testing:
*
* self->qos.baud_rate.bits = IR_9600;
*
* Is is no good, as it prohibits (error-prone) speed-changes.
*/
self->qos.min_turn_time.bits = qos_mtt_bits;
irda_qos_bits_to_value(&self->qos);
/* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
self->rx_buff.truesize = 14384 + 2048;
self->tx_buff.truesize = 14384 + 2048;
/* Allocate memory if needed */
self->rx_buff.head =
dma_alloc_coherent(NULL, self->rx_buff.truesize,
&self->rx_buff_dma, GFP_KERNEL);
if (self->rx_buff.head == NULL) {
err = -ENOMEM;
goto err_out2;
}
memset(self->rx_buff.head, 0, self->rx_buff.truesize);
self->tx_buff.head =
dma_alloc_coherent(NULL, self->tx_buff.truesize,
&self->tx_buff_dma, GFP_KERNEL);
if (self->tx_buff.head == NULL) {
err = -ENOMEM;
goto err_out3;
}
memset(self->tx_buff.head, 0, self->tx_buff.truesize);
self->rx_buff.in_frame = FALSE;
self->rx_buff.state = OUTSIDE_FRAME;
self->tx_buff.data = self->tx_buff.head;
self->rx_buff.data = self->rx_buff.head;
/* Reset Tx queue info */
self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
self->tx_fifo.tail = self->tx_buff.head;
/* Keep track of module usage */
SET_MODULE_OWNER(dev);
/* Override the network functions we need to use */
dev->hard_start_xmit = via_ircc_hard_xmit_sir;
dev->open = via_ircc_net_open;
dev->stop = via_ircc_net_close;
dev->do_ioctl = via_ircc_net_ioctl;
dev->get_stats = via_ircc_net_get_stats;
err = register_netdev(dev);
if (err)
goto err_out4;
IRDA_MESSAGE("IrDA: Registered device %s (via-ircc)\n", dev->name);
/* Initialise the hardware..
*/
self->io.speed = 9600;
via_hw_init(self);
return 0;
err_out4:
dma_free_coherent(NULL, self->tx_buff.truesize,
self->tx_buff.head, self->tx_buff_dma);
err_out3:
dma_free_coherent(NULL, self->rx_buff.truesize,
self->rx_buff.head, self->rx_buff_dma);
err_out2:
release_region(self->io.fir_base, self->io.fir_ext);
err_out1:
free_netdev(dev);
dev_self[i] = NULL;
return err;
}
/*
* Function via_ircc_close (self)
*
* Close driver instance
*
*/
static int via_ircc_close(struct via_ircc_cb *self)
{
int iobase;
IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
IRDA_ASSERT(self != NULL, return -1;);
iobase = self->io.fir_base;
ResetChip(iobase, 5); //hardware reset.
/* Remove netdevice */
unregister_netdev(self->netdev);
/* Release the PORT that this driver is using */
IRDA_DEBUG(2, "%s(), Releasing Region %03x\n",
__FUNCTION__, self->io.fir_base);
release_region(self->io.fir_base, self->io.fir_ext);
if (self->tx_buff.head)
dma_free_coherent(NULL, self->tx_buff.truesize,
self->tx_buff.head, self->tx_buff_dma);
if (self->rx_buff.head)
dma_free_coherent(NULL, self->rx_buff.truesize,
self->rx_buff.head, self->rx_buff_dma);
dev_self[self->index] = NULL;
free_netdev(self->netdev);
return 0;
}
/*
* Function via_hw_init(self)
*
* Returns non-negative on success.
*
* Formerly via_ircc_setup
*/
static void via_hw_init(struct via_ircc_cb *self)
{
int iobase = self->io.fir_base;
IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
SetMaxRxPacketSize(iobase, 0x0fff); //set to max:4095
// FIFO Init
EnRXFIFOReadyInt(iobase, OFF);
EnRXFIFOHalfLevelInt(iobase, OFF);
EnTXFIFOHalfLevelInt(iobase, OFF);
EnTXFIFOUnderrunEOMInt(iobase, ON);
EnTXFIFOReadyInt(iobase, OFF);
InvertTX(iobase, OFF);
InvertRX(iobase, OFF);
if (ReadLPCReg(0x20) == 0x3c)
WriteLPCReg(0xF0, 0); // for VT1211
/* Int Init */
EnRXSpecInt(iobase, ON);
/* The following is basically hwreset */
/* If this is the case, why not just call hwreset() ? Jean II */
ResetChip(iobase, 5);
EnableDMA(iobase, OFF);
EnableTX(iobase, OFF);
EnableRX(iobase, OFF);
EnRXDMA(iobase, OFF);
EnTXDMA(iobase, OFF);
RXStart(iobase, OFF);
TXStart(iobase, OFF);
InitCard(iobase);
CommonInit(iobase);
SIRFilter(iobase, ON);
SetSIR(iobase, ON);
CRC16(iobase, ON);
EnTXCRC(iobase, 0);
WriteReg(iobase, I_ST_CT_0, 0x00);
SetBaudRate(iobase, 9600);
SetPulseWidth(iobase, 12);
SetSendPreambleCount(iobase, 0);
self->io.speed = 9600;
self->st_fifo.len = 0;
via_ircc_change_dongle_speed(iobase, self->io.speed,
self->io.dongle_id);
WriteReg(iobase, I_ST_CT_0, 0x80);
}
/*
* Function via_ircc_read_dongle_id (void)
*
*/
static int via_ircc_read_dongle_id(int iobase)
{
int dongle_id = 9; /* Default to IBM */
IRDA_ERROR("via-ircc: dongle probing not supported, please specify dongle_id module parameter.\n");
return dongle_id;
}
/*
* Function via_ircc_change_dongle_speed (iobase, speed, dongle_id)
* Change speed of the attach dongle
* only implement two type of dongle currently.
*/
static void via_ircc_change_dongle_speed(int iobase, int speed,
int dongle_id)
{
u8 mode = 0;
/* speed is unused, as we use IsSIROn()/IsMIROn() */
speed = speed;
IRDA_DEBUG(1, "%s(): change_dongle_speed to %d for 0x%x, %d\n",
__FUNCTION__, speed, iobase, dongle_id);
switch (dongle_id) {
/* Note: The dongle_id's listed here are derived from
* nsc-ircc.c */
case 0x08: /* HP HSDL-2300, HP HSDL-3600/HSDL-3610 */
UseOneRX(iobase, ON); // use one RX pin RX1,RX2
InvertTX(iobase, OFF);
InvertRX(iobase, OFF);
EnRX2(iobase, ON); //sir to rx2
EnGPIOtoRX2(iobase, OFF);
if (IsSIROn(iobase)) { //sir
// Mode select Off
SlowIRRXLowActive(iobase, ON);
udelay(1000);
SlowIRRXLowActive(iobase, OFF);
} else {
if (IsMIROn(iobase)) { //mir
// Mode select On
SlowIRRXLowActive(iobase, OFF);
udelay(20);
} else { // fir
if (IsFIROn(iobase)) { //fir
// Mode select On
SlowIRRXLowActive(iobase, OFF);
udelay(20);
}
}
}
break;
case 0x09: /* IBM31T1100 or Temic TFDS6000/TFDS6500 */
UseOneRX(iobase, ON); //use ONE RX....RX1
InvertTX(iobase, OFF);
InvertRX(iobase, OFF); // invert RX pin
EnRX2(iobase, ON);
EnGPIOtoRX2(iobase, OFF);
if (IsSIROn(iobase)) { //sir
// Mode select On
SlowIRRXLowActive(iobase, ON);
udelay(20);
// Mode select Off
SlowIRRXLowActive(iobase, OFF);
}
if (IsMIROn(iobase)) { //mir
// Mode select On
SlowIRRXLowActive(iobase, OFF);
udelay(20);
// Mode select Off
SlowIRRXLowActive(iobase, ON);
} else { // fir
if (IsFIROn(iobase)) { //fir
// Mode select On
SlowIRRXLowActive(iobase, OFF);
// TX On
WriteTX(iobase, ON);
udelay(20);
// Mode select OFF
SlowIRRXLowActive(iobase, ON);
udelay(20);
// TX Off
WriteTX(iobase, OFF);
}
}
break;
case 0x0d:
UseOneRX(iobase, OFF); // use two RX pin RX1,RX2
InvertTX(iobase, OFF);
InvertRX(iobase, OFF);
SlowIRRXLowActive(iobase, OFF);
if (IsSIROn(iobase)) { //sir
EnGPIOtoRX2(iobase, OFF);
WriteGIO(iobase, OFF);
EnRX2(iobase, OFF); //sir to rx2
} else { // fir mir
EnGPIOtoRX2(iobase, OFF);
WriteGIO(iobase, OFF);
EnRX2(iobase, OFF); //fir to rx
}
break;
case 0x11: /* Temic TFDS4500 */
IRDA_DEBUG(2, "%s: Temic TFDS4500: One RX pin, TX normal, RX inverted.\n", __FUNCTION__);
UseOneRX(iobase, ON); //use ONE RX....RX1
InvertTX(iobase, OFF);
InvertRX(iobase, ON); // invert RX pin
EnRX2(iobase, ON); //sir to rx2
EnGPIOtoRX2(iobase, OFF);
if( IsSIROn(iobase) ){ //sir
// Mode select On
SlowIRRXLowActive(iobase, ON);
udelay(20);
// Mode select Off
SlowIRRXLowActive(iobase, OFF);
} else{
IRDA_DEBUG(0, "%s: Warning: TFDS4500 not running in SIR mode !\n", __FUNCTION__);
}
break;
case 0x0ff: /* Vishay */
if (IsSIROn(iobase))
mode = 0;
else if (IsMIROn(iobase))
mode = 1;
else if (IsFIROn(iobase))
mode = 2;
else if (IsVFIROn(iobase))
mode = 5; //VFIR-16
SI_SetMode(iobase, mode);
break;
default:
IRDA_ERROR("%s: Error: dongle_id %d unsupported !\n",
__FUNCTION__, dongle_id);
}
}
/*
* Function via_ircc_change_speed (self, baud)
*
* Change the speed of the device
*
*/
static void via_ircc_change_speed(struct via_ircc_cb *self, __u32 speed)
{
struct net_device *dev = self->netdev;
u16 iobase;
u8 value = 0, bTmp;
iobase = self->io.fir_base;
/* Update accounting for new speed */
self->io.speed = speed;
IRDA_DEBUG(1, "%s: change_speed to %d bps.\n", __FUNCTION__, speed);
WriteReg(iobase, I_ST_CT_0, 0x0);
/* Controller mode sellection */
switch (speed) {
case 2400:
case 9600:
case 19200:
case 38400:
case 57600:
case 115200:
value = (115200/speed)-1;
SetSIR(iobase, ON);
CRC16(iobase, ON);
break;
case 576000:
/* FIXME: this can't be right, as it's the same as 115200,
* and 576000 is MIR, not SIR. */
value = 0;
SetSIR(iobase, ON);
CRC16(iobase, ON);
break;
case 1152000:
value = 0;
SetMIR(iobase, ON);
/* FIXME: CRC ??? */
break;
case 4000000:
value = 0;
SetFIR(iobase, ON);
SetPulseWidth(iobase, 0);
SetSendPreambleCount(iobase, 14);
CRC16(iobase, OFF);
EnTXCRC(iobase, ON);
break;
case 16000000:
value = 0;
SetVFIR(iobase, ON);
/* FIXME: CRC ??? */
break;
default:
value = 0;
break;
}
/* Set baudrate to 0x19[2..7] */
bTmp = (ReadReg(iobase, I_CF_H_1) & 0x03);
bTmp |= value << 2;
WriteReg(iobase, I_CF_H_1, bTmp);
/* Some dongles may need to be informed about speed changes. */
via_ircc_change_dongle_speed(iobase, speed, self->io.dongle_id);
/* Set FIFO size to 64 */
SetFIFO(iobase, 64);
/* Enable IR */
WriteReg(iobase, I_ST_CT_0, 0x80);
// EnTXFIFOHalfLevelInt(iobase,ON);
/* Enable some interrupts so we can receive frames */
//EnAllInt(iobase,ON);
if (IsSIROn(iobase)) {
SIRFilter(iobase, ON);
SIRRecvAny(iobase, ON);
} else {
SIRFilter(iobase, OFF);
SIRRecvAny(iobase, OFF);
}
if (speed > 115200) {
/* Install FIR xmit handler */
dev->hard_start_xmit = via_ircc_hard_xmit_fir;
via_ircc_dma_receive(self);
} else {
/* Install SIR xmit handler */
dev->hard_start_xmit = via_ircc_hard_xmit_sir;
}
netif_wake_queue(dev);
}
/*
* Function via_ircc_hard_xmit (skb, dev)
*
* Transmit the frame!
*
*/
static int via_ircc_hard_xmit_sir(struct sk_buff *skb,
struct net_device *dev)
{
struct via_ircc_cb *self;
unsigned long flags;
u16 iobase;
__u32 speed;
self = (struct via_ircc_cb *) dev->priv;
IRDA_ASSERT(self != NULL, return 0;);
iobase = self->io.fir_base;
netif_stop_queue(dev);
/* Check if we need to change the speed */
speed = irda_get_next_speed(skb);
if ((speed != self->io.speed) && (speed != -1)) {
/* Check for empty frame */
if (!skb->len) {
via_ircc_change_speed(self, speed);
dev->trans_start = jiffies;
dev_kfree_skb(skb);
return 0;
} else
self->new_speed = speed;
}
InitCard(iobase);
CommonInit(iobase);
SIRFilter(iobase, ON);
SetSIR(iobase, ON);
CRC16(iobase, ON);
EnTXCRC(iobase, 0);
WriteReg(iobase, I_ST_CT_0, 0x00);
spin_lock_irqsave(&self->lock, flags);
self->tx_buff.data = self->tx_buff.head;
self->tx_buff.len =
async_wrap_skb(skb, self->tx_buff.data,
self->tx_buff.truesize);
self->stats.tx_bytes += self->tx_buff.len;
/* Send this frame with old speed */
SetBaudRate(iobase, self->io.speed);
SetPulseWidth(iobase, 12);
SetSendPreambleCount(iobase, 0);
WriteReg(iobase, I_ST_CT_0, 0x80);
EnableTX(iobase, ON);
EnableRX(iobase, OFF);
ResetChip(iobase, 0);
ResetChip(iobase, 1);
ResetChip(iobase, 2);
ResetChip(iobase, 3);
ResetChip(iobase, 4);
EnAllInt(iobase, ON);
EnTXDMA(iobase, ON);
EnRXDMA(iobase, OFF);
irda_setup_dma(self->io.dma, self->tx_buff_dma, self->tx_buff.len,
DMA_TX_MODE);
SetSendByte(iobase, self->tx_buff.len);
RXStart(iobase, OFF);
TXStart(iobase, ON);
dev->trans_start = jiffies;
spin_unlock_irqrestore(&self->lock, flags);
dev_kfree_skb(skb);
return 0;
}
static int via_ircc_hard_xmit_fir(struct sk_buff *skb,
struct net_device *dev)
{
struct via_ircc_cb *self;
u16 iobase;
__u32 speed;
unsigned long flags;
self = (struct via_ircc_cb *) dev->priv;
iobase = self->io.fir_base;
if (self->st_fifo.len)
return 0;
if (self->chip_id == 0x3076)
iodelay(1500);
else
udelay(1500);
netif_stop_queue(dev);
speed = irda_get_next_speed(skb);
if ((speed != self->io.speed) && (speed != -1)) {
if (!skb->len) {
via_ircc_change_speed(self, speed);
dev->trans_start = jiffies;
dev_kfree_skb(skb);
return 0;
} else
self->new_speed = speed;
}
spin_lock_irqsave(&self->lock, flags);
self->tx_fifo.queue[self->tx_fifo.free].start = self->tx_fifo.tail;
self->tx_fifo.queue[self->tx_fifo.free].len = skb->len;
self->tx_fifo.tail += skb->len;
self->stats.tx_bytes += skb->len;
skb_copy_from_linear_data(skb,
self->tx_fifo.queue[self->tx_fifo.free].start, skb->len);
self->tx_fifo.len++;
self->tx_fifo.free++;
//F01 if (self->tx_fifo.len == 1) {
via_ircc_dma_xmit(self, iobase);
//F01 }
//F01 if (self->tx_fifo.free < (MAX_TX_WINDOW -1 )) netif_wake_queue(self->netdev);
dev->trans_start = jiffies;
dev_kfree_skb(skb);
spin_unlock_irqrestore(&self->lock, flags);
return 0;
}
static int via_ircc_dma_xmit(struct via_ircc_cb *self, u16 iobase)
{
EnTXDMA(iobase, OFF);
self->io.direction = IO_XMIT;
EnPhys(iobase, ON);
EnableTX(iobase, ON);
EnableRX(iobase, OFF);
ResetChip(iobase, 0);
ResetChip(iobase, 1);
ResetChip(iobase, 2);
ResetChip(iobase, 3);
ResetChip(iobase, 4);
EnAllInt(iobase, ON);
EnTXDMA(iobase, ON);
EnRXDMA(iobase, OFF);
irda_setup_dma(self->io.dma,
((u8 *)self->tx_fifo.queue[self->tx_fifo.ptr].start -
self->tx_buff.head) + self->tx_buff_dma,
self->tx_fifo.queue[self->tx_fifo.ptr].len, DMA_TX_MODE);
IRDA_DEBUG(1, "%s: tx_fifo.ptr=%x,len=%x,tx_fifo.len=%x..\n",
__FUNCTION__, self->tx_fifo.ptr,
self->tx_fifo.queue[self->tx_fifo.ptr].len,
self->tx_fifo.len);
SetSendByte(iobase, self->tx_fifo.queue[self->tx_fifo.ptr].len);
RXStart(iobase, OFF);
TXStart(iobase, ON);
return 0;
}
/*
* Function via_ircc_dma_xmit_complete (self)
*
* The transfer of a frame in finished. This function will only be called
* by the interrupt handler
*
*/
static int via_ircc_dma_xmit_complete(struct via_ircc_cb *self)
{
int iobase;
int ret = TRUE;
u8 Tx_status;
IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
iobase = self->io.fir_base;
/* Disable DMA */
// DisableDmaChannel(self->io.dma);
/* Check for underrrun! */
/* Clear bit, by writing 1 into it */
Tx_status = GetTXStatus(iobase);
if (Tx_status & 0x08) {
self->stats.tx_errors++;
self->stats.tx_fifo_errors++;
hwreset(self);
// how to clear underrrun ?
} else {
self->stats.tx_packets++;
ResetChip(iobase, 3);
ResetChip(iobase, 4);
}
/* Check if we need to change the speed */
if (self->new_speed) {
via_ircc_change_speed(self, self->new_speed);
self->new_speed = 0;
}
/* Finished with this frame, so prepare for next */
if (IsFIROn(iobase)) {
if (self->tx_fifo.len) {
self->tx_fifo.len--;
self->tx_fifo.ptr++;
}
}
IRDA_DEBUG(1,
"%s: tx_fifo.len=%x ,tx_fifo.ptr=%x,tx_fifo.free=%x...\n",
__FUNCTION__,
self->tx_fifo.len, self->tx_fifo.ptr, self->tx_fifo.free);
/* F01_S
// Any frames to be sent back-to-back?
if (self->tx_fifo.len) {
// Not finished yet!
via_ircc_dma_xmit(self, iobase);
ret = FALSE;
} else {
F01_E*/
// Reset Tx FIFO info
self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
self->tx_fifo.tail = self->tx_buff.head;
//F01 }
// Make sure we have room for more frames
//F01 if (self->tx_fifo.free < (MAX_TX_WINDOW -1 )) {
// Not busy transmitting anymore
// Tell the network layer, that we can accept more frames
netif_wake_queue(self->netdev);
//F01 }
return ret;
}
/*
* Function via_ircc_dma_receive (self)
*
* Set configuration for receive a frame.
*
*/
static int via_ircc_dma_receive(struct via_ircc_cb *self)
{
int iobase;
iobase = self->io.fir_base;
IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
self->tx_fifo.tail = self->tx_buff.head;
self->RxDataReady = 0;
self->io.direction = IO_RECV;
self->rx_buff.data = self->rx_buff.head;
self->st_fifo.len = self->st_fifo.pending_bytes = 0;
self->st_fifo.tail = self->st_fifo.head = 0;
EnPhys(iobase, ON);
EnableTX(iobase, OFF);
EnableRX(iobase, ON);
ResetChip(iobase, 0);
ResetChip(iobase, 1);
ResetChip(iobase, 2);
ResetChip(iobase, 3);
ResetChip(iobase, 4);
EnAllInt(iobase, ON);
EnTXDMA(iobase, OFF);
EnRXDMA(iobase, ON);
irda_setup_dma(self->io.dma2, self->rx_buff_dma,
self->rx_buff.truesize, DMA_RX_MODE);
TXStart(iobase, OFF);
RXStart(iobase, ON);
return 0;
}
/*
* Function via_ircc_dma_receive_complete (self)
*
* Controller Finished with receiving frames,
* and this routine is call by ISR
*
*/
static int via_ircc_dma_receive_complete(struct via_ircc_cb *self,
int iobase)
{
struct st_fifo *st_fifo;
struct sk_buff *skb;
int len, i;
u8 status = 0;
iobase = self->io.fir_base;
st_fifo = &self->st_fifo;
if (self->io.speed < 4000000) { //Speed below FIR
len = GetRecvByte(iobase, self);
skb = dev_alloc_skb(len + 1);
if (skb == NULL)
return FALSE;
// Make sure IP header gets aligned
skb_reserve(skb, 1);
skb_put(skb, len - 2);
if (self->chip_id == 0x3076) {
for (i = 0; i < len - 2; i++)
skb->data[i] = self->rx_buff.data[i * 2];
} else {
if (self->chip_id == 0x3096) {
for (i = 0; i < len - 2; i++)
skb->data[i] =
self->rx_buff.data[i];
}
}
// Move to next frame
self->rx_buff.data += len;
self->stats.rx_bytes += len;
self->stats.rx_packets++;
skb->dev = self->netdev;
skb_reset_mac_header(skb);
skb->protocol = htons(ETH_P_IRDA);
netif_rx(skb);
return TRUE;
}
else { //FIR mode
len = GetRecvByte(iobase, self);
if (len == 0)
return TRUE; //interrupt only, data maybe move by RxT
if (((len - 4) < 2) || ((len - 4) > 2048)) {
IRDA_DEBUG(1, "%s(): Trouble:len=%x,CurCount=%x,LastCount=%x..\n",
__FUNCTION__, len, RxCurCount(iobase, self),
self->RxLastCount);
hwreset(self);
return FALSE;
}
IRDA_DEBUG(2, "%s(): fifo.len=%x,len=%x,CurCount=%x..\n",
__FUNCTION__,
st_fifo->len, len - 4, RxCurCount(iobase, self));
st_fifo->entries[st_fifo->tail].status = status;
st_fifo->entries[st_fifo->tail].len = len;
st_fifo->pending_bytes += len;
st_fifo->tail++;
st_fifo->len++;
if (st_fifo->tail > MAX_RX_WINDOW)
st_fifo->tail = 0;
self->RxDataReady = 0;
// It maybe have MAX_RX_WINDOW package receive by
// receive_complete before Timer IRQ
/* F01_S
if (st_fifo->len < (MAX_RX_WINDOW+2 )) {
RXStart(iobase,ON);
SetTimer(iobase,4);
}
else {
F01_E */
EnableRX(iobase, OFF);
EnRXDMA(iobase, OFF);
RXStart(iobase, OFF);
//F01_S
// Put this entry back in fifo
if (st_fifo->head > MAX_RX_WINDOW)
st_fifo->head = 0;
status = st_fifo->entries[st_fifo->head].status;
len = st_fifo->entries[st_fifo->head].len;
st_fifo->head++;
st_fifo->len--;
skb = dev_alloc_skb(len + 1 - 4);
/*
* if frame size,data ptr,or skb ptr are wrong ,the get next
* entry.
*/
if ((skb == NULL) || (skb->data == NULL)
|| (self->rx_buff.data == NULL) || (len < 6)) {
self->stats.rx_dropped++;
return TRUE;
}
skb_reserve(skb, 1);
skb_put(skb, len - 4);
skb_copy_to_linear_data(skb, self->rx_buff.data, len - 4);
IRDA_DEBUG(2, "%s(): len=%x.rx_buff=%p\n", __FUNCTION__,
len - 4, self->rx_buff.data);
// Move to next frame
self->rx_buff.data += len;
self->stats.rx_bytes += len;
self->stats.rx_packets++;
skb->dev = self->netdev;
skb_reset_mac_header(skb);
skb->protocol = htons(ETH_P_IRDA);
netif_rx(skb);
//F01_E
} //FIR
return TRUE;
}
/*
* if frame is received , but no INT ,then use this routine to upload frame.
*/
static int upload_rxdata(struct via_ircc_cb *self, int iobase)
{
struct sk_buff *skb;
int len;
struct st_fifo *st_fifo;
st_fifo = &self->st_fifo;
len = GetRecvByte(iobase, self);
IRDA_DEBUG(2, "%s(): len=%x\n", __FUNCTION__, len);
if ((len - 4) < 2) {
self->stats.rx_dropped++;
return FALSE;
}
skb = dev_alloc_skb(len + 1);
if (skb == NULL) {
self->stats.rx_dropped++;
return FALSE;
}
skb_reserve(skb, 1);
skb_put(skb, len - 4 + 1);
skb_copy_to_linear_data(skb, self->rx_buff.data, len - 4 + 1);
st_fifo->tail++;
st_fifo->len++;
if (st_fifo->tail > MAX_RX_WINDOW)
st_fifo->tail = 0;
// Move to next frame
self->rx_buff.data += len;
self->stats.rx_bytes += len;
self->stats.rx_packets++;
skb->dev = self->netdev;
skb_reset_mac_header(skb);
skb->protocol = htons(ETH_P_IRDA);
netif_rx(skb);
if (st_fifo->len < (MAX_RX_WINDOW + 2)) {
RXStart(iobase, ON);
} else {
EnableRX(iobase, OFF);
EnRXDMA(iobase, OFF);
RXStart(iobase, OFF);
}
return TRUE;
}
/*
* Implement back to back receive , use this routine to upload data.
*/
static int RxTimerHandler(struct via_ircc_cb *self, int iobase)
{
struct st_fifo *st_fifo;
struct sk_buff *skb;
int len;
u8 status;
st_fifo = &self->st_fifo;
if (CkRxRecv(iobase, self)) {
// if still receiving ,then return ,don't upload frame
self->RetryCount = 0;
SetTimer(iobase, 20);
self->RxDataReady++;
return FALSE;
} else
self->RetryCount++;
if ((self->RetryCount >= 1) ||
((st_fifo->pending_bytes + 2048) > self->rx_buff.truesize)
|| (st_fifo->len >= (MAX_RX_WINDOW))) {
while (st_fifo->len > 0) { //upload frame
// Put this entry back in fifo
if (st_fifo->head > MAX_RX_WINDOW)
st_fifo->head = 0;
status = st_fifo->entries[st_fifo->head].status;
len = st_fifo->entries[st_fifo->head].len;
st_fifo->head++;
st_fifo->len--;
skb = dev_alloc_skb(len + 1 - 4);
/*
* if frame size, data ptr, or skb ptr are wrong,
* then get next entry.
*/
if ((skb == NULL) || (skb->data == NULL)
|| (self->rx_buff.data == NULL) || (len < 6)) {
self->stats.rx_dropped++;
continue;
}
skb_reserve(skb, 1);
skb_put(skb, len - 4);
skb_copy_to_linear_data(skb, self->rx_buff.data, len - 4);
IRDA_DEBUG(2, "%s(): len=%x.head=%x\n", __FUNCTION__,
len - 4, st_fifo->head);
// Move to next frame
self->rx_buff.data += len;
self->stats.rx_bytes += len;
self->stats.rx_packets++;
skb->dev = self->netdev;
skb_reset_mac_header(skb);
skb->protocol = htons(ETH_P_IRDA);
netif_rx(skb);
} //while
self->RetryCount = 0;
IRDA_DEBUG(2,
"%s(): End of upload HostStatus=%x,RxStatus=%x\n",
__FUNCTION__,
GetHostStatus(iobase), GetRXStatus(iobase));
/*
* if frame is receive complete at this routine ,then upload
* frame.
*/
if ((GetRXStatus(iobase) & 0x10)
&& (RxCurCount(iobase, self) != self->RxLastCount)) {
upload_rxdata(self, iobase);
if (irda_device_txqueue_empty(self->netdev))
via_ircc_dma_receive(self);
}
} // timer detect complete
else
SetTimer(iobase, 4);
return TRUE;
}
/*
* Function via_ircc_interrupt (irq, dev_id)
*
* An interrupt from the chip has arrived. Time to do some work
*
*/
static irqreturn_t via_ircc_interrupt(int irq, void *dev_id)
{
struct net_device *dev = (struct net_device *) dev_id;
struct via_ircc_cb *self;
int iobase;
u8 iHostIntType, iRxIntType, iTxIntType;
if (!dev) {
IRDA_WARNING("%s: irq %d for unknown device.\n", driver_name,
irq);
return IRQ_NONE;
}
self = (struct via_ircc_cb *) dev->priv;
iobase = self->io.fir_base;
spin_lock(&self->lock);
iHostIntType = GetHostStatus(iobase);
IRDA_DEBUG(4, "%s(): iHostIntType %02x: %s %s %s %02x\n",
__FUNCTION__, iHostIntType,
(iHostIntType & 0x40) ? "Timer" : "",
(iHostIntType & 0x20) ? "Tx" : "",
(iHostIntType & 0x10) ? "Rx" : "",
(iHostIntType & 0x0e) >> 1);
if ((iHostIntType & 0x40) != 0) { //Timer Event
self->EventFlag.TimeOut++;
ClearTimerInt(iobase, 1);
if (self->io.direction == IO_XMIT) {
via_ircc_dma_xmit(self, iobase);
}
if (self->io.direction == IO_RECV) {
/*
* frame ready hold too long, must reset.
*/
if (self->RxDataReady > 30) {
hwreset(self);
if (irda_device_txqueue_empty(self->netdev)) {
via_ircc_dma_receive(self);
}
} else { // call this to upload frame.
RxTimerHandler(self, iobase);
}
} //RECV
} //Timer Event
if ((iHostIntType & 0x20) != 0) { //Tx Event
iTxIntType = GetTXStatus(iobase);
IRDA_DEBUG(4, "%s(): iTxIntType %02x: %s %s %s %s\n",
__FUNCTION__, iTxIntType,
(iTxIntType & 0x08) ? "FIFO underr." : "",
(iTxIntType & 0x04) ? "EOM" : "",
(iTxIntType & 0x02) ? "FIFO ready" : "",
(iTxIntType & 0x01) ? "Early EOM" : "");
if (iTxIntType & 0x4) {
self->EventFlag.EOMessage++; // read and will auto clean
if (via_ircc_dma_xmit_complete(self)) {
if (irda_device_txqueue_empty
(self->netdev)) {
via_ircc_dma_receive(self);
}
} else {
self->EventFlag.Unknown++;
}
} //EOP
} //Tx Event
//----------------------------------------
if ((iHostIntType & 0x10) != 0) { //Rx Event
/* Check if DMA has finished */
iRxIntType = GetRXStatus(iobase);
IRDA_DEBUG(4, "%s(): iRxIntType %02x: %s %s %s %s %s %s %s\n",
__FUNCTION__, iRxIntType,
(iRxIntType & 0x80) ? "PHY err." : "",
(iRxIntType & 0x40) ? "CRC err" : "",
(iRxIntType & 0x20) ? "FIFO overr." : "",
(iRxIntType & 0x10) ? "EOF" : "",
(iRxIntType & 0x08) ? "RxData" : "",
(iRxIntType & 0x02) ? "RxMaxLen" : "",
(iRxIntType & 0x01) ? "SIR bad" : "");
if (!iRxIntType)
IRDA_DEBUG(3, "%s(): RxIRQ =0\n", __FUNCTION__);
if (iRxIntType & 0x10) {
if (via_ircc_dma_receive_complete(self, iobase)) {
//F01 if(!(IsFIROn(iobase))) via_ircc_dma_receive(self);
via_ircc_dma_receive(self);
}
} // No ERR
else { //ERR
IRDA_DEBUG(4, "%s(): RxIRQ ERR:iRxIntType=%x,HostIntType=%x,CurCount=%x,RxLastCount=%x_____\n",
__FUNCTION__, iRxIntType, iHostIntType,
RxCurCount(iobase, self),
self->RxLastCount);
if (iRxIntType & 0x20) { //FIFO OverRun ERR
ResetChip(iobase, 0);
ResetChip(iobase, 1);
} else { //PHY,CRC ERR
if (iRxIntType != 0x08)
hwreset(self); //F01
}
via_ircc_dma_receive(self);
} //ERR
} //Rx Event
spin_unlock(&self->lock);
return IRQ_RETVAL(iHostIntType);
}
static void hwreset(struct via_ircc_cb *self)
{
int iobase;
iobase = self->io.fir_base;
IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
ResetChip(iobase, 5);
EnableDMA(iobase, OFF);
EnableTX(iobase, OFF);
EnableRX(iobase, OFF);
EnRXDMA(iobase, OFF);
EnTXDMA(iobase, OFF);
RXStart(iobase, OFF);
TXStart(iobase, OFF);
InitCard(iobase);
CommonInit(iobase);
SIRFilter(iobase, ON);
SetSIR(iobase, ON);
CRC16(iobase, ON);
EnTXCRC(iobase, 0);
WriteReg(iobase, I_ST_CT_0, 0x00);
SetBaudRate(iobase, 9600);
SetPulseWidth(iobase, 12);
SetSendPreambleCount(iobase, 0);
WriteReg(iobase, I_ST_CT_0, 0x80);
/* Restore speed. */
via_ircc_change_speed(self, self->io.speed);
self->st_fifo.len = 0;
}
/*
* Function via_ircc_is_receiving (self)
*
* Return TRUE is we are currently receiving a frame
*
*/
static int via_ircc_is_receiving(struct via_ircc_cb *self)
{
int status = FALSE;
int iobase;
IRDA_ASSERT(self != NULL, return FALSE;);
iobase = self->io.fir_base;
if (CkRxRecv(iobase, self))
status = TRUE;
IRDA_DEBUG(2, "%s(): status=%x....\n", __FUNCTION__, status);
return status;
}
/*
* Function via_ircc_net_open (dev)
*
* Start the device
*
*/
static int via_ircc_net_open(struct net_device *dev)
{
struct via_ircc_cb *self;
int iobase;
char hwname[32];
IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
IRDA_ASSERT(dev != NULL, return -1;);
self = (struct via_ircc_cb *) dev->priv;
self->stats.rx_packets = 0;
IRDA_ASSERT(self != NULL, return 0;);
iobase = self->io.fir_base;
if (request_irq(self->io.irq, via_ircc_interrupt, 0, dev->name, dev)) {
IRDA_WARNING("%s, unable to allocate irq=%d\n", driver_name,
self->io.irq);
return -EAGAIN;
}
/*
* Always allocate the DMA channel after the IRQ, and clean up on
* failure.
*/
if (request_dma(self->io.dma, dev->name)) {
IRDA_WARNING("%s, unable to allocate dma=%d\n", driver_name,
self->io.dma);
free_irq(self->io.irq, self);
return -EAGAIN;
}
if (self->io.dma2 != self->io.dma) {
if (request_dma(self->io.dma2, dev->name)) {
IRDA_WARNING("%s, unable to allocate dma2=%d\n",
driver_name, self->io.dma2);
free_irq(self->io.irq, self);
return -EAGAIN;
}
}
/* turn on interrupts */
EnAllInt(iobase, ON);
EnInternalLoop(iobase, OFF);
EnExternalLoop(iobase, OFF);
/* */
via_ircc_dma_receive(self);
/* Ready to play! */
netif_start_queue(dev);
/*
* Open new IrLAP layer instance, now that everything should be
* initialized properly
*/
sprintf(hwname, "VIA @ 0x%x", iobase);
self->irlap = irlap_open(dev, &self->qos, hwname);
self->RxLastCount = 0;
return 0;
}
/*
* Function via_ircc_net_close (dev)
*
* Stop the device
*
*/
static int via_ircc_net_close(struct net_device *dev)
{
struct via_ircc_cb *self;
int iobase;
IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
IRDA_ASSERT(dev != NULL, return -1;);
self = (struct via_ircc_cb *) dev->priv;
IRDA_ASSERT(self != NULL, return 0;);
/* Stop device */
netif_stop_queue(dev);
/* Stop and remove instance of IrLAP */
if (self->irlap)
irlap_close(self->irlap);
self->irlap = NULL;
iobase = self->io.fir_base;
EnTXDMA(iobase, OFF);
EnRXDMA(iobase, OFF);
DisableDmaChannel(self->io.dma);
/* Disable interrupts */
EnAllInt(iobase, OFF);
free_irq(self->io.irq, dev);
free_dma(self->io.dma);
return 0;
}
/*
* Function via_ircc_net_ioctl (dev, rq, cmd)
*
* Process IOCTL commands for this device
*
*/
static int via_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq,
int cmd)
{
struct if_irda_req *irq = (struct if_irda_req *) rq;
struct via_ircc_cb *self;
unsigned long flags;
int ret = 0;
IRDA_ASSERT(dev != NULL, return -1;);
self = dev->priv;
IRDA_ASSERT(self != NULL, return -1;);
IRDA_DEBUG(1, "%s(), %s, (cmd=0x%X)\n", __FUNCTION__, dev->name,
cmd);
/* Disable interrupts & save flags */
spin_lock_irqsave(&self->lock, flags);
switch (cmd) {
case SIOCSBANDWIDTH: /* Set bandwidth */
if (!capable(CAP_NET_ADMIN)) {
ret = -EPERM;
goto out;
}
via_ircc_change_speed(self, irq->ifr_baudrate);
break;
case SIOCSMEDIABUSY: /* Set media busy */
if (!capable(CAP_NET_ADMIN)) {
ret = -EPERM;
goto out;
}
irda_device_set_media_busy(self->netdev, TRUE);
break;
case SIOCGRECEIVING: /* Check if we are receiving right now */
irq->ifr_receiving = via_ircc_is_receiving(self);
break;
default:
ret = -EOPNOTSUPP;
}
out:
spin_unlock_irqrestore(&self->lock, flags);
return ret;
}
static struct net_device_stats *via_ircc_net_get_stats(struct net_device
*dev)
{
struct via_ircc_cb *self = (struct via_ircc_cb *) dev->priv;
return &self->stats;
}
MODULE_AUTHOR("VIA Technologies,inc");
MODULE_DESCRIPTION("VIA IrDA Device Driver");
MODULE_LICENSE("GPL");
module_init(via_ircc_init);
module_exit(via_ircc_cleanup);
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