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/*********************************************************************
*
* Filename: nsc-ircc.c
* Version: 1.0
* Description: Driver for the NSC PC'108 and PC'338 IrDA chipsets
* Status: Stable.
* Author: Dag Brattli <dagb@cs.uit.no>
* Created at: Sat Nov 7 21:43:15 1998
* Modified at: Wed Mar 1 11:29:34 2000
* Modified by: Dag Brattli <dagb@cs.uit.no>
*
* Copyright (c) 1998-2000 Dag Brattli <dagb@cs.uit.no>
* Copyright (c) 1998 Lichen Wang, <lwang@actisys.com>
* Copyright (c) 1998 Actisys Corp., www.actisys.com
* 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 Dag Brattli nor University of Tromsų admit liability nor
* provide warranty for any of this software. This material is
* provided "AS-IS" and at no charge.
*
* Notice that all functions that needs to access the chip in _any_
* way, must save BSR register on entry, and restore it on exit.
* It is _very_ important to follow this policy!
*
* __u8 bank;
*
* bank = inb(iobase+BSR);
*
* do_your_stuff_here();
*
* outb(bank, iobase+BSR);
*
* If you find bugs in this file, its very likely that the same bug
* will also be in w83977af_ir.c since the implementations are quite
* similar.
*
********************************************************************/
#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 <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/irmod.h>
#include <net/irda/irlap_frame.h>
#include <net/irda/irda_device.h>
#include <net/irda/nsc-ircc.h>
#define CHIP_IO_EXTENT 8
#define BROKEN_DONGLE_ID
static char *driver_name = "nsc-ircc";
/* Module parameters */
static int qos_mtt_bits = 0x07; /* 1 ms or more */
static int dongle_id;
/* Use BIOS settions by default, but user may supply module parameters */
static unsigned int io[] = { ~0, ~0, ~0, ~0 };
static unsigned int irq[] = { 0, 0, 0, 0, 0 };
static unsigned int dma[] = { 0, 0, 0, 0, 0 };
static int nsc_ircc_probe_108(nsc_chip_t *chip, chipio_t *info);
static int nsc_ircc_probe_338(nsc_chip_t *chip, chipio_t *info);
static int nsc_ircc_init_108(nsc_chip_t *chip, chipio_t *info);
static int nsc_ircc_init_338(nsc_chip_t *chip, chipio_t *info);
/* These are the known NSC chips */
static nsc_chip_t chips[] = {
{ "PC87108", { 0x150, 0x398, 0xea }, 0x05, 0x10, 0xf0,
nsc_ircc_probe_108, nsc_ircc_init_108 },
{ "PC87338", { 0x398, 0x15c, 0x2e }, 0x08, 0xb0, 0xf8,
nsc_ircc_probe_338, nsc_ircc_init_338 },
{ NULL }
};
/* Max 4 instances for now */
static struct nsc_ircc_cb *dev_self[] = { NULL, NULL, NULL, NULL };
static char *dongle_types[] = {
"Differential serial interface",
"Differential serial interface",
"Reserved",
"Reserved",
"Sharp RY5HD01",
"Reserved",
"Single-ended serial interface",
"Consumer-IR only",
"HP HSDL-2300, HP HSDL-3600/HSDL-3610",
"IBM31T1100 or Temic TFDS6000/TFDS6500",
"Reserved",
"Reserved",
"HP HSDL-1100/HSDL-2100",
"HP HSDL-1100/HSDL-2100",
"Supports SIR Mode only",
"No dongle connected",
};
/* Some prototypes */
static int nsc_ircc_open(int i, chipio_t *info);
#ifdef MODULE
static int nsc_ircc_close(struct nsc_ircc_cb *self);
#endif /* MODULE */
static int nsc_ircc_setup(chipio_t *info);
static void nsc_ircc_pio_receive(struct nsc_ircc_cb *self);
static int nsc_ircc_dma_receive(struct nsc_ircc_cb *self);
static int nsc_ircc_dma_receive_complete(struct nsc_ircc_cb *self, int iobase);
static int nsc_ircc_hard_xmit_sir(struct sk_buff *skb, struct net_device *dev);
static int nsc_ircc_hard_xmit_fir(struct sk_buff *skb, struct net_device *dev);
static int nsc_ircc_pio_write(int iobase, __u8 *buf, int len, int fifo_size);
static void nsc_ircc_dma_xmit(struct nsc_ircc_cb *self, int iobase);
static void nsc_ircc_change_speed(struct nsc_ircc_cb *self, __u32 baud);
static void nsc_ircc_interrupt(int irq, void *dev_id, struct pt_regs *regs);
static int nsc_ircc_is_receiving(struct nsc_ircc_cb *self);
static int nsc_ircc_read_dongle_id (int iobase);
static void nsc_ircc_init_dongle_interface (int iobase, int dongle_id);
static int nsc_ircc_net_init(struct net_device *dev);
static int nsc_ircc_net_open(struct net_device *dev);
static int nsc_ircc_net_close(struct net_device *dev);
static int nsc_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
static struct net_device_stats *nsc_ircc_net_get_stats(struct net_device *dev);
static int nsc_ircc_pmproc(struct pm_dev *dev, pm_request_t rqst, void *data);
/*
* Function nsc_ircc_init ()
*
* Initialize chip. Just try to find out how many chips we are dealing with
* and where they are
*/
int __init nsc_ircc_init(void)
{
chipio_t info;
nsc_chip_t *chip;
int ret = -ENODEV;
int cfg_base;
int cfg, id;
int reg;
int i = 0;
/* Probe for all the NSC chipsets we know about */
for (chip=chips; chip->name ; chip++) {
IRDA_DEBUG(2, __FUNCTION__"(), Probing for %s ...\n",
chip->name);
/* Try all config registers for this chip */
for (cfg=0; cfg<3; cfg++) {
cfg_base = chip->cfg[cfg];
if (!cfg_base)
continue;
memset(&info, 0, sizeof(chipio_t));
info.cfg_base = cfg_base;
info.fir_base = io[i];
info.dma = dma[i];
info.irq = irq[i];
/* Read index register */
reg = inb(cfg_base);
if (reg == 0xff) {
IRDA_DEBUG(2, __FUNCTION__
"() no chip at 0x%03x\n", cfg_base);
continue;
}
/* Read chip identification register */
outb(chip->cid_index, cfg_base);
id = inb(cfg_base+1);
if ((id & chip->cid_mask) == chip->cid_value) {
IRDA_DEBUG(2, __FUNCTION__
"() Found %s chip, revision=%d\n",
chip->name, id & ~chip->cid_mask);
/*
* If the user supplies the base address, then
* we init the chip, if not we probe the values
* set by the BIOS
*/
if (io[i] < 0x2000) {
chip->init(chip, &info);
} else
chip->probe(chip, &info);
if (nsc_ircc_open(i, &info) == 0)
ret = 0;
i++;
} else {
IRDA_DEBUG(2, __FUNCTION__
"(), Wrong chip id=0x%02x\n", id);
}
}
}
return ret;
}
/*
* Function nsc_ircc_cleanup ()
*
* Close all configured chips
*
*/
#ifdef MODULE
static void nsc_ircc_cleanup(void)
{
int i;
pm_unregister_all(nsc_ircc_pmproc);
for (i=0; i < 4; i++) {
if (dev_self[i])
nsc_ircc_close(dev_self[i]);
}
}
#endif /* MODULE */
/*
* Function nsc_ircc_open (iobase, irq)
*
* Open driver instance
*
*/
static int nsc_ircc_open(int i, chipio_t *info)
{
struct net_device *dev;
struct nsc_ircc_cb *self;
struct pm_dev *pmdev;
void *ret;
int err;
IRDA_DEBUG(2, __FUNCTION__ "()\n");
MESSAGE("%s, Found chip at base=0x%03x\n", driver_name,
info->cfg_base);
if ((nsc_ircc_setup(info)) == -1)
return -1;
MESSAGE("%s, driver loaded (Dag Brattli)\n", driver_name);
/* Allocate new instance of the driver */
self = kmalloc(sizeof(struct nsc_ircc_cb), GFP_KERNEL);
if (self == NULL) {
ERROR(__FUNCTION__ "(), can't allocate memory for "
"control block!\n");
return -ENOMEM;
}
memset(self, 0, sizeof(struct nsc_ircc_cb));
spin_lock_init(&self->lock);
/* Need to store self somewhere */
dev_self[i] = self;
self->index = i;
/* Initialize IO */
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.fifo_size = 32;
/* Reserve the ioports that we need */
ret = request_region(self->io.fir_base, self->io.fir_ext, driver_name);
if (!ret) {
WARNING(__FUNCTION__ "(), can't get iobase of 0x%03x\n",
self->io.fir_base);
dev_self[i] = NULL;
kfree(self);
return -ENODEV;
}
/* Initialize QoS for this device */
irda_init_max_qos_capabilies(&self->qos);
/* The only value we must override it the baudrate */
self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
IR_115200|IR_576000|IR_1152000 |(IR_4000000 << 8);
self->qos.min_turn_time.bits = qos_mtt_bits;
irda_qos_bits_to_value(&self->qos);
self->flags = IFF_FIR|IFF_MIR|IFF_SIR|IFF_DMA|IFF_PIO|IFF_DONGLE;
/* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
self->rx_buff.truesize = 14384;
self->tx_buff.truesize = 14384;
/* Allocate memory if needed */
self->rx_buff.head = (__u8 *) kmalloc(self->rx_buff.truesize,
GFP_KERNEL|GFP_DMA);
if (self->rx_buff.head == NULL) {
kfree(self);
return -ENOMEM;
}
memset(self->rx_buff.head, 0, self->rx_buff.truesize);
self->tx_buff.head = (__u8 *) kmalloc(self->tx_buff.truesize,
GFP_KERNEL|GFP_DMA);
if (self->tx_buff.head == NULL) {
kfree(self->rx_buff.head);
kfree(self);
return -ENOMEM;
}
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;
if (!(dev = dev_alloc("irda%d", &err))) {
ERROR(__FUNCTION__ "(), dev_alloc() failed!\n");
return -ENOMEM;
}
dev->priv = (void *) self;
self->netdev = dev;
/* Override the network functions we need to use */
dev->init = nsc_ircc_net_init;
dev->hard_start_xmit = nsc_ircc_hard_xmit_sir;
dev->open = nsc_ircc_net_open;
dev->stop = nsc_ircc_net_close;
dev->do_ioctl = nsc_ircc_net_ioctl;
dev->get_stats = nsc_ircc_net_get_stats;
rtnl_lock();
err = register_netdevice(dev);
rtnl_unlock();
if (err) {
ERROR(__FUNCTION__ "(), register_netdev() failed!\n");
return -1;
}
MESSAGE("IrDA: Registered device %s\n", dev->name);
/* Check if user has supplied the dongle id or not */
if (!dongle_id) {
dongle_id = nsc_ircc_read_dongle_id(self->io.fir_base);
MESSAGE("%s, Found dongle: %s\n", driver_name,
dongle_types[dongle_id]);
} else {
MESSAGE("%s, Using dongle: %s\n", driver_name,
dongle_types[dongle_id]);
}
self->io.dongle_id = dongle_id;
nsc_ircc_init_dongle_interface(self->io.fir_base, dongle_id);
pmdev = pm_register(PM_SYS_DEV, PM_SYS_IRDA, nsc_ircc_pmproc);
if (pmdev)
pmdev->data = self;
return 0;
}
#ifdef MODULE
/*
* Function nsc_ircc_close (self)
*
* Close driver instance
*
*/
static int nsc_ircc_close(struct nsc_ircc_cb *self)
{
int iobase;
IRDA_DEBUG(4, __FUNCTION__ "()\n");
ASSERT(self != NULL, return -1;);
iobase = self->io.fir_base;
/* Remove netdevice */
if (self->netdev) {
rtnl_lock();
unregister_netdevice(self->netdev);
rtnl_unlock();
}
/* Release the PORT that this driver is using */
IRDA_DEBUG(4, __FUNCTION__ "(), Releasing Region %03x\n",
self->io.fir_base);
release_region(self->io.fir_base, self->io.fir_ext);
if (self->tx_buff.head)
kfree(self->tx_buff.head);
if (self->rx_buff.head)
kfree(self->rx_buff.head);
dev_self[self->index] = NULL;
kfree(self);
return 0;
}
#endif /* MODULE */
/*
* Function nsc_ircc_init_108 (iobase, cfg_base, irq, dma)
*
* Initialize the NSC '108 chip
*
*/
static int nsc_ircc_init_108(nsc_chip_t *chip, chipio_t *info)
{
int cfg_base = info->cfg_base;
__u8 temp=0;
outb(2, cfg_base); /* Mode Control Register (MCTL) */
outb(0x00, cfg_base+1); /* Disable device */
/* Base Address and Interrupt Control Register (BAIC) */
outb(0, cfg_base);
switch (info->fir_base) {
case 0x3e8: outb(0x14, cfg_base+1); break;
case 0x2e8: outb(0x15, cfg_base+1); break;
case 0x3f8: outb(0x16, cfg_base+1); break;
case 0x2f8: outb(0x17, cfg_base+1); break;
default: ERROR(__FUNCTION__ "(), invalid base_address");
}
/* Control Signal Routing Register (CSRT) */
switch (info->irq) {
case 3: temp = 0x01; break;
case 4: temp = 0x02; break;
case 5: temp = 0x03; break;
case 7: temp = 0x04; break;
case 9: temp = 0x05; break;
case 11: temp = 0x06; break;
case 15: temp = 0x07; break;
default: ERROR(__FUNCTION__ "(), invalid irq");
}
outb(1, cfg_base);
switch (info->dma) {
case 0: outb(0x08+temp, cfg_base+1); break;
case 1: outb(0x10+temp, cfg_base+1); break;
case 3: outb(0x18+temp, cfg_base+1); break;
default: ERROR(__FUNCTION__ "(), invalid dma");
}
outb(2, cfg_base); /* Mode Control Register (MCTL) */
outb(0x03, cfg_base+1); /* Enable device */
return 0;
}
/*
* Function nsc_ircc_probe_108 (chip, info)
*
*
*
*/
static int nsc_ircc_probe_108(nsc_chip_t *chip, chipio_t *info)
{
int cfg_base = info->cfg_base;
int reg;
/* Read address and interrupt control register (BAIC) */
outb(CFG_BAIC, cfg_base);
reg = inb(cfg_base+1);
switch (reg & 0x03) {
case 0:
info->fir_base = 0x3e8;
break;
case 1:
info->fir_base = 0x2e8;
break;
case 2:
info->fir_base = 0x3f8;
break;
case 3:
info->fir_base = 0x2f8;
break;
}
info->sir_base = info->fir_base;
IRDA_DEBUG(2, __FUNCTION__ "(), probing fir_base=0x%03x\n",
info->fir_base);
/* Read control signals routing register (CSRT) */
outb(CFG_CSRT, cfg_base);
reg = inb(cfg_base+1);
switch (reg & 0x07) {
case 0:
info->irq = -1;
break;
case 1:
info->irq = 3;
break;
case 2:
info->irq = 4;
break;
case 3:
info->irq = 5;
break;
case 4:
info->irq = 7;
break;
case 5:
info->irq = 9;
break;
case 6:
info->irq = 11;
break;
case 7:
info->irq = 15;
break;
}
IRDA_DEBUG(2, __FUNCTION__ "(), probing irq=%d\n", info->irq);
/* Currently we only read Rx DMA but it will also be used for Tx */
switch ((reg >> 3) & 0x03) {
case 0:
info->dma = -1;
break;
case 1:
info->dma = 0;
break;
case 2:
info->dma = 1;
break;
case 3:
info->dma = 3;
break;
}
IRDA_DEBUG(2, __FUNCTION__ "(), probing dma=%d\n", info->dma);
/* Read mode control register (MCTL) */
outb(CFG_MCTL, cfg_base);
reg = inb(cfg_base+1);
info->enabled = reg & 0x01;
info->suspended = !((reg >> 1) & 0x01);
return 0;
}
/*
* Function nsc_ircc_init_338 (chip, info)
*
* Initialize the NSC '338 chip. Remember that the 87338 needs two
* consecutive writes to the data registers while CPU interrupts are
* disabled. The 97338 does not require this, but shouldn't be any
* harm if we do it anyway.
*/
static int nsc_ircc_init_338(nsc_chip_t *chip, chipio_t *info)
{
/* No init yet */
return 0;
}
/*
* Function nsc_ircc_probe_338 (chip, info)
*
*
*
*/
static int nsc_ircc_probe_338(nsc_chip_t *chip, chipio_t *info)
{
int cfg_base = info->cfg_base;
int reg, com = 0;
int pnp;
/* Read funtion enable register (FER) */
outb(CFG_FER, cfg_base);
reg = inb(cfg_base+1);
info->enabled = (reg >> 2) & 0x01;
/* Check if we are in Legacy or PnP mode */
outb(CFG_PNP0, cfg_base);
reg = inb(cfg_base+1);
pnp = (reg >> 3) & 0x01;
if (pnp) {
IRDA_DEBUG(2, "(), Chip is in PnP mode\n");
outb(0x46, cfg_base);
reg = (inb(cfg_base+1) & 0xfe) << 2;
outb(0x47, cfg_base);
reg |= ((inb(cfg_base+1) & 0xfc) << 8);
info->fir_base = reg;
} else {
/* Read function address register (FAR) */
outb(CFG_FAR, cfg_base);
reg = inb(cfg_base+1);
switch ((reg >> 4) & 0x03) {
case 0:
info->fir_base = 0x3f8;
break;
case 1:
info->fir_base = 0x2f8;
break;
case 2:
com = 3;
break;
case 3:
com = 4;
break;
}
if (com) {
switch ((reg >> 6) & 0x03) {
case 0:
if (com == 3)
info->fir_base = 0x3e8;
else
info->fir_base = 0x2e8;
break;
case 1:
if (com == 3)
info->fir_base = 0x338;
else
info->fir_base = 0x238;
break;
case 2:
if (com == 3)
info->fir_base = 0x2e8;
else
info->fir_base = 0x2e0;
break;
case 3:
if (com == 3)
info->fir_base = 0x220;
else
info->fir_base = 0x228;
break;
}
}
}
info->sir_base = info->fir_base;
/* Read PnP register 1 (PNP1) */
outb(CFG_PNP1, cfg_base);
reg = inb(cfg_base+1);
info->irq = reg >> 4;
/* Read PnP register 3 (PNP3) */
outb(CFG_PNP3, cfg_base);
reg = inb(cfg_base+1);
info->dma = (reg & 0x07) - 1;
/* Read power and test register (PTR) */
outb(CFG_PTR, cfg_base);
reg = inb(cfg_base+1);
info->suspended = reg & 0x01;
return 0;
}
/*
* Function nsc_ircc_setup (info)
*
* Returns non-negative on success.
*
*/
static int nsc_ircc_setup(chipio_t *info)
{
int version;
int iobase = info->fir_base;
/* Read the Module ID */
switch_bank(iobase, BANK3);
version = inb(iobase+MID);
/* Should be 0x2? */
if (0x20 != (version & 0xf0)) {
ERROR("%s, Wrong chip version %02x\n", driver_name, version);
return -1;
}
/* Switch to advanced mode */
switch_bank(iobase, BANK2);
outb(ECR1_EXT_SL, iobase+ECR1);
switch_bank(iobase, BANK0);
/* Set FIFO threshold to TX17, RX16, reset and enable FIFO's */
switch_bank(iobase, BANK0);
outb(FCR_RXTH|FCR_TXTH|FCR_TXSR|FCR_RXSR|FCR_FIFO_EN, iobase+FCR);
outb(0x03, iobase+LCR); /* 8 bit word length */
outb(MCR_SIR, iobase+MCR); /* Start at SIR-mode, also clears LSR*/
/* Set FIFO size to 32 */
switch_bank(iobase, BANK2);
outb(EXCR2_RFSIZ|EXCR2_TFSIZ, iobase+EXCR2);
/* IRCR2: FEND_MD is not set */
switch_bank(iobase, BANK5);
outb(0x02, iobase+4);
/* Make sure that some defaults are OK */
switch_bank(iobase, BANK6);
outb(0x20, iobase+0); /* Set 32 bits FIR CRC */
outb(0x0a, iobase+1); /* Set MIR pulse width */
outb(0x0d, iobase+2); /* Set SIR pulse width to 1.6us */
outb(0x2a, iobase+4); /* Set beginning frag, and preamble length */
/* Enable receive interrupts */
switch_bank(iobase, BANK0);
outb(IER_RXHDL_IE, iobase+IER);
return 0;
}
/*
* Function nsc_ircc_read_dongle_id (void)
*
* Try to read dongle indentification. This procedure needs to be executed
* once after power-on/reset. It also needs to be used whenever you suspect
* that the user may have plugged/unplugged the IrDA Dongle.
*/
static int nsc_ircc_read_dongle_id (int iobase)
{
int dongle_id;
__u8 bank;
bank = inb(iobase+BSR);
/* Select Bank 7 */
switch_bank(iobase, BANK7);
/* IRCFG4: IRSL0_DS and IRSL21_DS are cleared */
outb(0x00, iobase+7);
/* ID0, 1, and 2 are pulled up/down very slowly */
udelay(50);
/* IRCFG1: read the ID bits */
dongle_id = inb(iobase+4) & 0x0f;
#ifdef BROKEN_DONGLE_ID
if (dongle_id == 0x0a)
dongle_id = 0x09;
#endif
/* Go back to bank 0 before returning */
switch_bank(iobase, BANK0);
outb(bank, iobase+BSR);
return dongle_id;
}
/*
* Function nsc_ircc_init_dongle_interface (iobase, dongle_id)
*
* This function initializes the dongle for the transceiver that is
* used. This procedure needs to be executed once after
* power-on/reset. It also needs to be used whenever you suspect that
* the dongle is changed.
*/
static void nsc_ircc_init_dongle_interface (int iobase, int dongle_id)
{
int bank;
/* Save current bank */
bank = inb(iobase+BSR);
/* Select Bank 7 */
switch_bank(iobase, BANK7);
/* IRCFG4: set according to dongle_id */
switch (dongle_id) {
case 0x00: /* same as */
case 0x01: /* Differential serial interface */
IRDA_DEBUG(0, __FUNCTION__ "(), %s not defined by irda yet\n",
dongle_types[dongle_id]);
break;
case 0x02: /* same as */
case 0x03: /* Reserved */
IRDA_DEBUG(0, __FUNCTION__ "(), %s not defined by irda yet\n",
dongle_types[dongle_id]);
break;
case 0x04: /* Sharp RY5HD01 */
break;
case 0x05: /* Reserved, but this is what the Thinkpad reports */
IRDA_DEBUG(0, __FUNCTION__ "(), %s not defined by irda yet\n",
dongle_types[dongle_id]);
break;
case 0x06: /* Single-ended serial interface */
IRDA_DEBUG(0, __FUNCTION__ "(), %s not defined by irda yet\n",
dongle_types[dongle_id]);
break;
case 0x07: /* Consumer-IR only */
IRDA_DEBUG(0, __FUNCTION__ "(), %s is not for IrDA mode\n",
dongle_types[dongle_id]);
break;
case 0x08: /* HP HSDL-2300, HP HSDL-3600/HSDL-3610 */
IRDA_DEBUG(0, __FUNCTION__ "(), %s\n",
dongle_types[dongle_id]);
break;
case 0x09: /* IBM31T1100 or Temic TFDS6000/TFDS6500 */
outb(0x28, iobase+7); /* Set irsl[0-2] as output */
break;
case 0x0A: /* same as */
case 0x0B: /* Reserved */
IRDA_DEBUG(0, __FUNCTION__ "(), %s not defined by irda yet\n",
dongle_types[dongle_id]);
break;
case 0x0C: /* same as */
case 0x0D: /* HP HSDL-1100/HSDL-2100 */
/*
* Set irsl0 as input, irsl[1-2] as output, and separate
* inputs are used for SIR and MIR/FIR
*/
outb(0x48, iobase+7);
break;
case 0x0E: /* Supports SIR Mode only */
outb(0x28, iobase+7); /* Set irsl[0-2] as output */
break;
case 0x0F: /* No dongle connected */
IRDA_DEBUG(0, __FUNCTION__ "(), %s\n",
dongle_types[dongle_id]);
switch_bank(iobase, BANK0);
outb(0x62, iobase+MCR);
break;
default:
IRDA_DEBUG(0, __FUNCTION__ "(), invalid dongle_id %#x",
dongle_id);
}
/* IRCFG1: IRSL1 and 2 are set to IrDA mode */
outb(0x00, iobase+4);
/* Restore bank register */
outb(bank, iobase+BSR);
} /* set_up_dongle_interface */
/*
* Function nsc_ircc_change_dongle_speed (iobase, speed, dongle_id)
*
* Change speed of the attach dongle
*
*/
static void nsc_ircc_change_dongle_speed(int iobase, int speed, int dongle_id)
{
unsigned long flags;
__u8 bank;
/* Save current bank */
bank = inb(iobase+BSR);
/* Select Bank 7 */
switch_bank(iobase, BANK7);
/* IRCFG1: set according to dongle_id */
switch (dongle_id) {
case 0x00: /* same as */
case 0x01: /* Differential serial interface */
IRDA_DEBUG(0, __FUNCTION__ "(), %s not defined by irda yet\n",
dongle_types[dongle_id]);
break;
case 0x02: /* same as */
case 0x03: /* Reserved */
IRDA_DEBUG(0, __FUNCTION__ "(), %s not defined by irda yet\n",
dongle_types[dongle_id]);
break;
case 0x04: /* Sharp RY5HD01 */
break;
case 0x05: /* Reserved */
IRDA_DEBUG(0, __FUNCTION__ "(), %s not defined by irda yet\n",
dongle_types[dongle_id]);
break;
case 0x06: /* Single-ended serial interface */
IRDA_DEBUG(0, __FUNCTION__ "(), %s not defined by irda yet\n",
dongle_types[dongle_id]);
break;
case 0x07: /* Consumer-IR only */
IRDA_DEBUG(0, __FUNCTION__ "(), %s is not for IrDA mode\n",
dongle_types[dongle_id]);
break;
case 0x08: /* HP HSDL-2300, HP HSDL-3600/HSDL-3610 */
IRDA_DEBUG(0, __FUNCTION__ "(), %s\n",
dongle_types[dongle_id]);
outb(0x00, iobase+4);
if (speed > 115200)
outb(0x01, iobase+4);
break;
case 0x09: /* IBM31T1100 or Temic TFDS6000/TFDS6500 */
outb(0x01, iobase+4);
if (speed == 4000000) {
save_flags(flags);
cli();
outb(0x81, iobase+4);
outb(0x80, iobase+4);
restore_flags(flags);
} else
outb(0x00, iobase+4);
break;
case 0x0A: /* same as */
case 0x0B: /* Reserved */
IRDA_DEBUG(0, __FUNCTION__ "(), %s not defined by irda yet\n",
dongle_types[dongle_id]);
break;
case 0x0C: /* same as */
case 0x0D: /* HP HSDL-1100/HSDL-2100 */
break;
case 0x0E: /* Supports SIR Mode only */
break;
case 0x0F: /* No dongle connected */
IRDA_DEBUG(0, __FUNCTION__ "(), %s is not for IrDA mode\n",
dongle_types[dongle_id]);
switch_bank(iobase, BANK0);
outb(0x62, iobase+MCR);
break;
default:
IRDA_DEBUG(0, __FUNCTION__ "(), invalid data_rate\n");
}
/* Restore bank register */
outb(bank, iobase+BSR);
}
/*
* Function nsc_ircc_change_speed (self, baud)
*
* Change the speed of the device
*
*/
static void nsc_ircc_change_speed(struct nsc_ircc_cb *self, __u32 speed)
{
struct net_device *dev = self->netdev;
__u8 mcr = MCR_SIR;
int iobase;
__u8 bank;
IRDA_DEBUG(2, __FUNCTION__ "(), speed=%d\n", speed);
ASSERT(self != NULL, return;);
iobase = self->io.fir_base;
/* Update accounting for new speed */
self->io.speed = speed;
/* Save current bank */
bank = inb(iobase+BSR);
/* Disable interrupts */
switch_bank(iobase, BANK0);
outb(0, iobase+IER);
/* Select Bank 2 */
switch_bank(iobase, BANK2);
outb(0x00, iobase+BGDH);
switch (speed) {
case 9600: outb(0x0c, iobase+BGDL); break;
case 19200: outb(0x06, iobase+BGDL); break;
case 38400: outb(0x03, iobase+BGDL); break;
case 57600: outb(0x02, iobase+BGDL); break;
case 115200: outb(0x01, iobase+BGDL); break;
case 576000:
switch_bank(iobase, BANK5);
/* IRCR2: MDRS is set */
outb(inb(iobase+4) | 0x04, iobase+4);
mcr = MCR_MIR;
IRDA_DEBUG(0, __FUNCTION__ "(), handling baud of 576000\n");
break;
case 1152000:
mcr = MCR_MIR;
IRDA_DEBUG(0, __FUNCTION__ "(), handling baud of 1152000\n");
break;
case 4000000:
mcr = MCR_FIR;
IRDA_DEBUG(0, __FUNCTION__ "(), handling baud of 4000000\n");
break;
default:
mcr = MCR_FIR;
IRDA_DEBUG(0, __FUNCTION__ "(), unknown baud rate of %d\n",
speed);
break;
}
/* Set appropriate speed mode */
switch_bank(iobase, BANK0);
outb(mcr | MCR_TX_DFR, iobase+MCR);
/* Give some hits to the transceiver */
nsc_ircc_change_dongle_speed(iobase, speed, self->io.dongle_id);
/* Set FIFO threshold to TX17, RX16 */
switch_bank(iobase, BANK0);
outb(0x00, iobase+FCR);
outb(FCR_FIFO_EN, iobase+FCR);
outb(FCR_RXTH| /* Set Rx FIFO threshold */
FCR_TXTH| /* Set Tx FIFO threshold */
FCR_TXSR| /* Reset Tx FIFO */
FCR_RXSR| /* Reset Rx FIFO */
FCR_FIFO_EN, /* Enable FIFOs */
iobase+FCR);
/* Set FIFO size to 32 */
switch_bank(iobase, BANK2);
outb(EXCR2_RFSIZ|EXCR2_TFSIZ, iobase+EXCR2);
/* Enable some interrupts so we can receive frames */
switch_bank(iobase, BANK0);
if (speed > 115200) {
/* Install FIR xmit handler */
dev->hard_start_xmit = nsc_ircc_hard_xmit_fir;
outb(IER_SFIF_IE, iobase+IER);
nsc_ircc_dma_receive(self);
} else {
/* Install SIR xmit handler */
dev->hard_start_xmit = nsc_ircc_hard_xmit_sir;
outb(IER_RXHDL_IE, iobase+IER);
}
/* Restore BSR */
outb(bank, iobase+BSR);
netif_wake_queue(dev);
}
/*
* Function nsc_ircc_hard_xmit (skb, dev)
*
* Transmit the frame!
*
*/
static int nsc_ircc_hard_xmit_sir(struct sk_buff *skb, struct net_device *dev)
{
struct nsc_ircc_cb *self;
unsigned long flags;
int iobase;
__s32 speed;
__u8 bank;
self = (struct nsc_ircc_cb *) dev->priv;
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) {
nsc_ircc_change_speed(self, speed);
dev_kfree_skb(skb);
return 0;
} else
self->new_speed = speed;
}
spin_lock_irqsave(&self->lock, flags);
/* Save current bank */
bank = inb(iobase+BSR);
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;
/* Add interrupt on tx low level (will fire immediately) */
switch_bank(iobase, BANK0);
outb(IER_TXLDL_IE, iobase+IER);
/* Restore bank register */
outb(bank, iobase+BSR);
spin_unlock_irqrestore(&self->lock, flags);
dev_kfree_skb(skb);
return 0;
}
static int nsc_ircc_hard_xmit_fir(struct sk_buff *skb, struct net_device *dev)
{
struct nsc_ircc_cb *self;
unsigned long flags;
int iobase;
__s32 speed;
__u8 bank;
int mtt, diff;
self = (struct nsc_ircc_cb *) dev->priv;
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) {
nsc_ircc_change_speed(self, speed);
dev_kfree_skb(skb);
return 0;
} else
self->new_speed = speed;
}
spin_lock_irqsave(&self->lock, flags);
/* Save current bank */
bank = inb(iobase+BSR);
/* Register and copy this frame to DMA memory */
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;
memcpy(self->tx_fifo.queue[self->tx_fifo.free].start, skb->data,
skb->len);
self->tx_fifo.len++;
self->tx_fifo.free++;
/* Start transmit only if there is currently no transmit going on */
if (self->tx_fifo.len == 1) {
/* Check if we must wait the min turn time or not */
mtt = irda_get_mtt(skb);
if (mtt) {
/* Check how much time we have used already */
do_gettimeofday(&self->now);
diff = self->now.tv_usec - self->stamp.tv_usec;
if (diff < 0)
diff += 1000000;
/* Check if the mtt is larger than the time we have
* already used by all the protocol processing
*/
if (mtt > diff) {
mtt -= diff;
/*
* Use timer if delay larger than 125 us, and
* use udelay for smaller values which should
* be acceptable
*/
if (mtt > 125) {
/* Adjust for timer resolution */
mtt = mtt / 125;
/* Setup timer */
switch_bank(iobase, BANK4);
outb(mtt & 0xff, iobase+TMRL);
outb((mtt >> 8) & 0x0f, iobase+TMRH);
/* Start timer */
outb(IRCR1_TMR_EN, iobase+IRCR1);
self->io.direction = IO_XMIT;
/* Enable timer interrupt */
switch_bank(iobase, BANK0);
outb(IER_TMR_IE, iobase+IER);
/* Timer will take care of the rest */
goto out;
} else
udelay(mtt);
}
}
/* Enable DMA interrupt */
switch_bank(iobase, BANK0);
outb(IER_DMA_IE, iobase+IER);
/* Transmit frame */
nsc_ircc_dma_xmit(self, iobase);
}
out:
/* Not busy transmitting anymore if window is not full */
if (self->tx_fifo.free < MAX_TX_WINDOW)
netif_wake_queue(self->netdev);
/* Restore bank register */
outb(bank, iobase+BSR);
spin_unlock_irqrestore(&self->lock, flags);
dev_kfree_skb(skb);
return 0;
}
/*
* Function nsc_ircc_dma_xmit (self, iobase)
*
* Transmit data using DMA
*
*/
static void nsc_ircc_dma_xmit(struct nsc_ircc_cb *self, int iobase)
{
int bsr;
/* Save current bank */
bsr = inb(iobase+BSR);
/* Disable DMA */
switch_bank(iobase, BANK0);
outb(inb(iobase+MCR) & ~MCR_DMA_EN, iobase+MCR);
self->io.direction = IO_XMIT;
/* Choose transmit DMA channel */
switch_bank(iobase, BANK2);
outb(ECR1_DMASWP|ECR1_DMANF|ECR1_EXT_SL, iobase+ECR1);
setup_dma(self->io.dma,
self->tx_fifo.queue[self->tx_fifo.ptr].start,
self->tx_fifo.queue[self->tx_fifo.ptr].len,
DMA_TX_MODE);
/* Enable DMA and SIR interaction pulse */
switch_bank(iobase, BANK0);
outb(inb(iobase+MCR)|MCR_TX_DFR|MCR_DMA_EN|MCR_IR_PLS, iobase+MCR);
/* Restore bank register */
outb(bsr, iobase+BSR);
}
/*
* Function nsc_ircc_pio_xmit (self, iobase)
*
* Transmit data using PIO. Returns the number of bytes that actually
* got transferred
*
*/
static int nsc_ircc_pio_write(int iobase, __u8 *buf, int len, int fifo_size)
{
int actual = 0;
__u8 bank;
IRDA_DEBUG(4, __FUNCTION__ "()\n");
/* Save current bank */
bank = inb(iobase+BSR);
switch_bank(iobase, BANK0);
if (!(inb_p(iobase+LSR) & LSR_TXEMP)) {
IRDA_DEBUG(4, __FUNCTION__
"(), warning, FIFO not empty yet!\n");
/* FIFO may still be filled to the Tx interrupt threshold */
fifo_size -= 17;
}
/* Fill FIFO with current frame */
while ((fifo_size-- > 0) && (actual < len)) {
/* Transmit next byte */
outb(buf[actual++], iobase+TXD);
}
IRDA_DEBUG(4, __FUNCTION__ "(), fifo_size %d ; %d sent of %d\n",
fifo_size, actual, len);
/* Restore bank */
outb(bank, iobase+BSR);
return actual;
}
/*
* Function nsc_ircc_dma_xmit_complete (self)
*
* The transfer of a frame in finished. This function will only be called
* by the interrupt handler
*
*/
static int nsc_ircc_dma_xmit_complete(struct nsc_ircc_cb *self)
{
int iobase;
__u8 bank;
int ret = TRUE;
IRDA_DEBUG(2, __FUNCTION__ "()\n");
iobase = self->io.fir_base;
/* Save current bank */
bank = inb(iobase+BSR);
/* Disable DMA */
switch_bank(iobase, BANK0);
outb(inb(iobase+MCR) & ~MCR_DMA_EN, iobase+MCR);
/* Check for underrrun! */
if (inb(iobase+ASCR) & ASCR_TXUR) {
self->stats.tx_errors++;
self->stats.tx_fifo_errors++;
/* Clear bit, by writing 1 into it */
outb(ASCR_TXUR, iobase+ASCR);
} else {
self->stats.tx_packets++;
}
/* Check if we need to change the speed */
if (self->new_speed) {
nsc_ircc_change_speed(self, self->new_speed);
self->new_speed = 0;
}
/* Finished with this frame, so prepare for next */
self->tx_fifo.ptr++;
self->tx_fifo.len--;
/* Any frames to be sent back-to-back? */
if (self->tx_fifo.len) {
nsc_ircc_dma_xmit(self, iobase);
/* Not finished yet! */
ret = FALSE;
} else {
/* 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;
}
/* Make sure we have room for more frames */
if (self->tx_fifo.free < MAX_TX_WINDOW) {
/* Not busy transmitting anymore */
/* Tell the network layer, that we can accept more frames */
netif_wake_queue(self->netdev);
}
/* Restore bank */
outb(bank, iobase+BSR);
return ret;
}
/*
* Function nsc_ircc_dma_receive (self)
*
* Get ready for receiving a frame. The device will initiate a DMA
* if it starts to receive a frame.
*
*/
static int nsc_ircc_dma_receive(struct nsc_ircc_cb *self)
{
int iobase;
__u8 bsr;
iobase = self->io.fir_base;
/* 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;
/* Save current bank */
bsr = inb(iobase+BSR);
/* Disable DMA */
switch_bank(iobase, BANK0);
outb(inb(iobase+MCR) & ~MCR_DMA_EN, iobase+MCR);
/* Choose DMA Rx, DMA Fairness, and Advanced mode */
switch_bank(iobase, BANK2);
outb(ECR1_DMANF|ECR1_EXT_SL, iobase+ECR1);
self->io.direction = IO_RECV;
self->rx_buff.data = self->rx_buff.head;
/* Reset Rx FIFO. This will also flush the ST_FIFO */
switch_bank(iobase, BANK0);
outb(FCR_RXSR|FCR_FIFO_EN, iobase+FCR);
self->st_fifo.len = self->st_fifo.pending_bytes = 0;
self->st_fifo.tail = self->st_fifo.head = 0;
setup_dma(self->io.dma, self->rx_buff.data, self->rx_buff.truesize,
DMA_RX_MODE);
/* Enable DMA */
switch_bank(iobase, BANK0);
outb(inb(iobase+MCR)|MCR_DMA_EN, iobase+MCR);
/* Restore bank register */
outb(bsr, iobase+BSR);
return 0;
}
/*
* Function nsc_ircc_dma_receive_complete (self)
*
* Finished with receiving frames
*
*
*/
static int nsc_ircc_dma_receive_complete(struct nsc_ircc_cb *self, int iobase)
{
struct st_fifo *st_fifo;
struct sk_buff *skb;
__u8 status;
__u8 bank;
int len;
st_fifo = &self->st_fifo;
/* Save current bank */
bank = inb(iobase+BSR);
/* Read all entries in status FIFO */
switch_bank(iobase, BANK5);
while ((status = inb(iobase+FRM_ST)) & FRM_ST_VLD) {
/* We must empty the status FIFO no matter what */
len = inb(iobase+RFLFL) | ((inb(iobase+RFLFH) & 0x1f) << 8);
if (st_fifo->tail >= MAX_RX_WINDOW) {
IRDA_DEBUG(0, __FUNCTION__ "(), window is full!\n");
continue;
}
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++;
}
/* Try to process all entries in status FIFO */
while (st_fifo->len > 0) {
/* Get first entry */
status = st_fifo->entries[st_fifo->head].status;
len = st_fifo->entries[st_fifo->head].len;
st_fifo->pending_bytes -= len;
st_fifo->head++;
st_fifo->len--;
/* Check for errors */
if (status & FRM_ST_ERR_MSK) {
if (status & FRM_ST_LOST_FR) {
/* Add number of lost frames to stats */
self->stats.rx_errors += len;
} else {
/* Skip frame */
self->stats.rx_errors++;
self->rx_buff.data += len;
if (status & FRM_ST_MAX_LEN)
self->stats.rx_length_errors++;
if (status & FRM_ST_PHY_ERR)
self->stats.rx_frame_errors++;
if (status & FRM_ST_BAD_CRC)
self->stats.rx_crc_errors++;
}
/* The errors below can be reported in both cases */
if (status & FRM_ST_OVR1)
self->stats.rx_fifo_errors++;
if (status & FRM_ST_OVR2)
self->stats.rx_fifo_errors++;
} else {
/*
* First we must make sure that the frame we
* want to deliver is all in main memory. If we
* cannot tell, then we check if the Rx FIFO is
* empty. If not then we will have to take a nap
* and try again later.
*/
if (st_fifo->pending_bytes < self->io.fifo_size) {
switch_bank(iobase, BANK0);
if (inb(iobase+LSR) & LSR_RXDA) {
/* Put this entry back in fifo */
st_fifo->head--;
st_fifo->len++;
st_fifo->pending_bytes += len;
st_fifo->entries[st_fifo->head].status = status;
st_fifo->entries[st_fifo->head].len = len;
/*
* DMA not finished yet, so try again
* later, set timer value, resolution
* 125 us
*/
switch_bank(iobase, BANK4);
outb(0x02, iobase+TMRL); /* x 125 us */
outb(0x00, iobase+TMRH);
/* Start timer */
outb(IRCR1_TMR_EN, iobase+IRCR1);
/* Restore bank register */
outb(bank, iobase+BSR);
return FALSE; /* I'll be back! */
}
}
/*
* Remember the time we received this frame, so we can
* reduce the min turn time a bit since we will know
* how much time we have used for protocol processing
*/
do_gettimeofday(&self->stamp);
skb = dev_alloc_skb(len+1);
if (skb == NULL) {
WARNING(__FUNCTION__ "(), memory squeeze, "
"dropping frame.\n");
self->stats.rx_dropped++;
/* Restore bank register */
outb(bank, iobase+BSR);
return FALSE;
}
/* Make sure IP header gets aligned */
skb_reserve(skb, 1);
/* Copy frame without CRC */
if (self->io.speed < 4000000) {
skb_put(skb, len-2);
memcpy(skb->data, self->rx_buff.data, len-2);
} else {
skb_put(skb, len-4);
memcpy(skb->data, self->rx_buff.data, len-4);
}
/* Move to next frame */
self->rx_buff.data += len;
self->stats.rx_bytes += len;
self->stats.rx_packets++;
skb->dev = self->netdev;
skb->mac.raw = skb->data;
skb->protocol = htons(ETH_P_IRDA);
netif_rx(skb);
}
}
/* Restore bank register */
outb(bank, iobase+BSR);
return TRUE;
}
/*
* Function nsc_ircc_pio_receive (self)
*
* Receive all data in receiver FIFO
*
*/
static void nsc_ircc_pio_receive(struct nsc_ircc_cb *self)
{
__u8 byte;
int iobase;
iobase = self->io.fir_base;
/* Receive all characters in Rx FIFO */
do {
byte = inb(iobase+RXD);
async_unwrap_char(self->netdev, &self->stats, &self->rx_buff,
byte);
} while (inb(iobase+LSR) & LSR_RXDA); /* Data available */
}
/*
* Function nsc_ircc_sir_interrupt (self, eir)
*
* Handle SIR interrupt
*
*/
static void nsc_ircc_sir_interrupt(struct nsc_ircc_cb *self, int eir)
{
int actual;
/* Check if transmit FIFO is low on data */
if (eir & EIR_TXLDL_EV) {
/* Write data left in transmit buffer */
actual = nsc_ircc_pio_write(self->io.fir_base,
self->tx_buff.data,
self->tx_buff.len,
self->io.fifo_size);
self->tx_buff.data += actual;
self->tx_buff.len -= actual;
self->io.direction = IO_XMIT;
/* Check if finished */
if (self->tx_buff.len > 0)
self->ier = IER_TXLDL_IE;
else {
self->stats.tx_packets++;
netif_wake_queue(self->netdev);
self->ier = IER_TXEMP_IE;
}
}
/* Check if transmission has completed */
if (eir & EIR_TXEMP_EV) {
/* Check if we need to change the speed? */
if (self->new_speed) {
IRDA_DEBUG(2, __FUNCTION__ "(), Changing speed!\n");
nsc_ircc_change_speed(self, self->new_speed);
self->new_speed = 0;
/* Check if we are going to FIR */
if (self->io.speed > 115200) {
/* Should wait for status FIFO interrupt */
self->ier = IER_SFIF_IE;
/* No need to do anymore SIR stuff */
return;
}
}
/* Turn around and get ready to receive some data */
self->io.direction = IO_RECV;
self->ier = IER_RXHDL_IE;
}
/* Rx FIFO threshold or timeout */
if (eir & EIR_RXHDL_EV) {
nsc_ircc_pio_receive(self);
/* Keep receiving */
self->ier = IER_RXHDL_IE;
}
}
/*
* Function nsc_ircc_fir_interrupt (self, eir)
*
* Handle MIR/FIR interrupt
*
*/
static void nsc_ircc_fir_interrupt(struct nsc_ircc_cb *self, int iobase,
int eir)
{
__u8 bank;
bank = inb(iobase+BSR);
/* Status FIFO event*/
if (eir & EIR_SFIF_EV) {
/* Check if DMA has finished */
if (nsc_ircc_dma_receive_complete(self, iobase)) {
/* Wait for next status FIFO interrupt */
self->ier = IER_SFIF_IE;
} else {
self->ier = IER_SFIF_IE | IER_TMR_IE;
}
} else if (eir & EIR_TMR_EV) { /* Timer finished */
/* Disable timer */
switch_bank(iobase, BANK4);
outb(0, iobase+IRCR1);
/* Clear timer event */
switch_bank(iobase, BANK0);
outb(ASCR_CTE, iobase+ASCR);
/* Check if this is a Tx timer interrupt */
if (self->io.direction == IO_XMIT) {
nsc_ircc_dma_xmit(self, iobase);
/* Interrupt on DMA */
self->ier = IER_DMA_IE;
} else {
/* Check (again) if DMA has finished */
if (nsc_ircc_dma_receive_complete(self, iobase)) {
self->ier = IER_SFIF_IE;
} else {
self->ier = IER_SFIF_IE | IER_TMR_IE;
}
}
} else if (eir & EIR_DMA_EV) {
/* Finished with all transmissions? */
if (nsc_ircc_dma_xmit_complete(self)) {
/* Check if there are more frames to be transmitted */
if (irda_device_txqueue_empty(self->netdev)) {
/* Prepare for receive */
nsc_ircc_dma_receive(self);
self->ier = IER_SFIF_IE;
}
} else {
/* Not finished yet, so interrupt on DMA again */
self->ier = IER_DMA_IE;
}
}
outb(bank, iobase+BSR);
}
/*
* Function nsc_ircc_interrupt (irq, dev_id, regs)
*
* An interrupt from the chip has arrived. Time to do some work
*
*/
static void nsc_ircc_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
struct net_device *dev = (struct net_device *) dev_id;
struct nsc_ircc_cb *self;
__u8 bsr, eir;
int iobase;
if (!dev) {
WARNING("%s: irq %d for unknown device.\n", driver_name, irq);
return;
}
self = (struct nsc_ircc_cb *) dev->priv;
spin_lock(&self->lock);
iobase = self->io.fir_base;
bsr = inb(iobase+BSR); /* Save current bank */
switch_bank(iobase, BANK0);
self->ier = inb(iobase+IER);
eir = inb(iobase+EIR) & self->ier; /* Mask out the interesting ones */
outb(0, iobase+IER); /* Disable interrupts */
if (eir) {
/* Dispatch interrupt handler for the current speed */
if (self->io.speed > 115200)
nsc_ircc_fir_interrupt(self, iobase, eir);
else
nsc_ircc_sir_interrupt(self, eir);
}
outb(self->ier, iobase+IER); /* Restore interrupts */
outb(bsr, iobase+BSR); /* Restore bank register */
spin_unlock(&self->lock);
}
/*
* Function nsc_ircc_is_receiving (self)
*
* Return TRUE is we are currently receiving a frame
*
*/
static int nsc_ircc_is_receiving(struct nsc_ircc_cb *self)
{
unsigned long flags;
int status = FALSE;
int iobase;
__u8 bank;
ASSERT(self != NULL, return FALSE;);
spin_lock_irqsave(&self->lock, flags);
if (self->io.speed > 115200) {
iobase = self->io.fir_base;
/* Check if rx FIFO is not empty */
bank = inb(iobase+BSR);
switch_bank(iobase, BANK2);
if ((inb(iobase+RXFLV) & 0x3f) != 0) {
/* We are receiving something */
status = TRUE;
}
outb(bank, iobase+BSR);
} else
status = (self->rx_buff.state != OUTSIDE_FRAME);
spin_unlock_irqrestore(&self->lock, flags);
return status;
}
/*
* Function nsc_ircc_net_init (dev)
*
* Initialize network device
*
*/
static int nsc_ircc_net_init(struct net_device *dev)
{
IRDA_DEBUG(4, __FUNCTION__ "()\n");
/* Setup to be a normal IrDA network device driver */
irda_device_setup(dev);
/* Insert overrides below this line! */
return 0;
}
/*
* Function nsc_ircc_net_open (dev)
*
* Start the device
*
*/
static int nsc_ircc_net_open(struct net_device *dev)
{
struct nsc_ircc_cb *self;
int iobase;
char hwname[32];
__u8 bank;
IRDA_DEBUG(4, __FUNCTION__ "()\n");
ASSERT(dev != NULL, return -1;);
self = (struct nsc_ircc_cb *) dev->priv;
ASSERT(self != NULL, return 0;);
iobase = self->io.fir_base;
if (request_irq(self->io.irq, nsc_ircc_interrupt, 0, dev->name, dev)) {
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)) {
WARNING("%s, unable to allocate dma=%d\n", driver_name,
self->io.dma);
free_irq(self->io.irq, dev);
return -EAGAIN;
}
/* Save current bank */
bank = inb(iobase+BSR);
/* turn on interrupts */
switch_bank(iobase, BANK0);
outb(IER_LS_IE | IER_RXHDL_IE, iobase+IER);
/* Restore bank register */
outb(bank, iobase+BSR);
/* Ready to play! */
netif_start_queue(dev);
/* Give self a hardware name */
sprintf(hwname, "NSC-FIR @ 0x%03x", self->io.fir_base);
/*
* Open new IrLAP layer instance, now that everything should be
* initialized properly
*/
self->irlap = irlap_open(dev, &self->qos, hwname);
MOD_INC_USE_COUNT;
return 0;
}
/*
* Function nsc_ircc_net_close (dev)
*
* Stop the device
*
*/
static int nsc_ircc_net_close(struct net_device *dev)
{
struct nsc_ircc_cb *self;
int iobase;
__u8 bank;
IRDA_DEBUG(4, __FUNCTION__ "()\n");
ASSERT(dev != NULL, return -1;);
self = (struct nsc_ircc_cb *) dev->priv;
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;
disable_dma(self->io.dma);
/* Save current bank */
bank = inb(iobase+BSR);
/* Disable interrupts */
switch_bank(iobase, BANK0);
outb(0, iobase+IER);
free_irq(self->io.irq, dev);
free_dma(self->io.dma);
/* Restore bank register */
outb(bank, iobase+BSR);
MOD_DEC_USE_COUNT;
return 0;
}
/*
* Function nsc_ircc_net_ioctl (dev, rq, cmd)
*
* Process IOCTL commands for this device
*
*/
static int nsc_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
struct if_irda_req *irq = (struct if_irda_req *) rq;
struct nsc_ircc_cb *self;
unsigned long flags;
int ret = 0;
ASSERT(dev != NULL, return -1;);
self = dev->priv;
ASSERT(self != NULL, return -1;);
IRDA_DEBUG(2, __FUNCTION__ "(), %s, (cmd=0x%X)\n", dev->name, cmd);
/* Disable interrupts & save flags */
save_flags(flags);
cli();
switch (cmd) {
case SIOCSBANDWIDTH: /* Set bandwidth */
if (!capable(CAP_NET_ADMIN)) {
ret = -EPERM;
goto out;
}
nsc_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 = nsc_ircc_is_receiving(self);
break;
default:
ret = -EOPNOTSUPP;
}
out:
restore_flags(flags);
return ret;
}
static struct net_device_stats *nsc_ircc_net_get_stats(struct net_device *dev)
{
struct nsc_ircc_cb *self = (struct nsc_ircc_cb *) dev->priv;
return &self->stats;
}
static void nsc_ircc_suspend(struct nsc_ircc_cb *self)
{
MESSAGE("%s, Suspending\n", driver_name);
if (self->io.suspended)
return;
nsc_ircc_net_close(self->netdev);
self->io.suspended = 1;
}
static void nsc_ircc_wakeup(struct nsc_ircc_cb *self)
{
if (!self->io.suspended)
return;
nsc_ircc_setup(&self->io);
nsc_ircc_net_open(self->netdev);
MESSAGE("%s, Waking up\n", driver_name);
self->io.suspended = 0;
}
static int nsc_ircc_pmproc(struct pm_dev *dev, pm_request_t rqst, void *data)
{
struct nsc_ircc_cb *self = (struct nsc_ircc_cb*) dev->data;
if (self) {
switch (rqst) {
case PM_SUSPEND:
nsc_ircc_suspend(self);
break;
case PM_RESUME:
nsc_ircc_wakeup(self);
break;
}
}
return 0;
}
#ifdef MODULE
MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
MODULE_DESCRIPTION("NSC IrDA Device Driver");
MODULE_LICENSE("GPL");
MODULE_PARM(qos_mtt_bits, "i");
MODULE_PARM_DESC(qos_mtt_bits, "Minimum Turn Time");
MODULE_PARM(io, "1-4i");
MODULE_PARM_DESC(io, "Base I/O addresses");
MODULE_PARM(irq, "1-4i");
MODULE_PARM_DESC(irq, "IRQ lines");
MODULE_PARM(dma, "1-4i");
MODULE_PARM_DESC(dma, "DMA channels");
MODULE_PARM(dongle_id, "i");
MODULE_PARM_DESC(dongle_id, "Type-id of used dongle");
int init_module(void)
{
return nsc_ircc_init();
}
void cleanup_module(void)
{
nsc_ircc_cleanup();
}
#endif /* MODULE */
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