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linux/drivers/net/irda/nsc-ircc.c
Justin P. Mattock 42b2aa86c6 treewide: Fix typos in various parts of the kernel, and fix some comments. 
The below patch fixes some typos in various parts of the kernel, as well as fixes some comments.
Please let me know if I missed anything, and I will try to get it changed and resent.

Signed-off-by: Justin P. Mattock <justinmattock@gmail.com>
Acked-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2011-12-02 14:57:31 +01:00

2422 lines
60 KiB
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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
* Copyright (c) 2000-2004 Jean Tourrilhes <jt@hpl.hp.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 Tromsø 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/gfp.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/init.h>
#include <linux/interrupt.h>
#include <linux/rtnetlink.h>
#include <linux/dma-mapping.h>
#include <linux/pnp.h>
#include <linux/platform_device.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/byteorder.h>
#include <net/irda/wrapper.h>
#include <net/irda/irda.h>
#include <net/irda/irda_device.h>
#include "nsc-ircc.h"
#define CHIP_IO_EXTENT 8
#define BROKEN_DONGLE_ID
static char *driver_name = "nsc-ircc";
/* Power Management */
#define NSC_IRCC_DRIVER_NAME "nsc-ircc"
static int nsc_ircc_suspend(struct platform_device *dev, pm_message_t state);
static int nsc_ircc_resume(struct platform_device *dev);
static struct platform_driver nsc_ircc_driver = {
.suspend = nsc_ircc_suspend,
.resume = nsc_ircc_resume,
.driver = {
.name = NSC_IRCC_DRIVER_NAME,
},
};
/* 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, ~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_probe_39x(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);
static int nsc_ircc_init_39x(nsc_chip_t *chip, chipio_t *info);
#ifdef CONFIG_PNP
static int nsc_ircc_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *id);
#endif
/* These are the known NSC chips */
static nsc_chip_t chips[] = {
/* Name, {cfg registers}, chip id index reg, chip id expected value, revision mask */
{ "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 },
/* Contributed by Steffen Pingel - IBM X40 */
{ "PC8738x", { 0x164e, 0x4e, 0x2e }, 0x20, 0xf4, 0xff,
nsc_ircc_probe_39x, nsc_ircc_init_39x },
/* Contributed by Jan Frey - IBM A30/A31 */
{ "PC8739x", { 0x2e, 0x4e, 0x0 }, 0x20, 0xea, 0xff,
nsc_ircc_probe_39x, nsc_ircc_init_39x },
/* IBM ThinkPads using PC8738x (T60/X60/Z60) */
{ "IBM-PC8738x", { 0x2e, 0x4e, 0x0 }, 0x20, 0xf4, 0xff,
nsc_ircc_probe_39x, nsc_ircc_init_39x },
/* IBM ThinkPads using PC8394T (T43/R52/?) */
{ "IBM-PC8394T", { 0x2e, 0x4e, 0x0 }, 0x20, 0xf9, 0xff,
nsc_ircc_probe_39x, nsc_ircc_init_39x },
{ NULL }
};
static struct nsc_ircc_cb *dev_self[] = { NULL, 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",
};
/* PNP probing */
static chipio_t pnp_info;
static const struct pnp_device_id nsc_ircc_pnp_table[] = {
{ .id = "NSC6001", .driver_data = 0 },
{ .id = "HWPC224", .driver_data = 0 },
{ .id = "IBM0071", .driver_data = NSC_FORCE_DONGLE_TYPE9 },
{ }
};
MODULE_DEVICE_TABLE(pnp, nsc_ircc_pnp_table);
static struct pnp_driver nsc_ircc_pnp_driver = {
#ifdef CONFIG_PNP
.name = "nsc-ircc",
.id_table = nsc_ircc_pnp_table,
.probe = nsc_ircc_pnp_probe,
#endif
};
/* Some prototypes */
static int nsc_ircc_open(chipio_t *info);
static int nsc_ircc_close(struct nsc_ircc_cb *self);
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 netdev_tx_t nsc_ircc_hard_xmit_sir(struct sk_buff *skb,
struct net_device *dev);
static netdev_tx_t 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 __u8 nsc_ircc_change_speed(struct nsc_ircc_cb *self, __u32 baud);
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_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);
/* Globals */
static int pnp_registered;
static int pnp_succeeded;
/*
* Function nsc_ircc_init ()
*
* Initialize chip. Just try to find out how many chips we are dealing with
* and where they are
*/
static int __init nsc_ircc_init(void)
{
chipio_t info;
nsc_chip_t *chip;
int ret;
int cfg_base;
int cfg, id;
int reg;
int i = 0;
ret = platform_driver_register(&nsc_ircc_driver);
if (ret) {
IRDA_ERROR("%s, Can't register driver!\n", driver_name);
return ret;
}
/* Register with PnP subsystem to detect disable ports */
ret = pnp_register_driver(&nsc_ircc_pnp_driver);
if (!ret)
pnp_registered = 1;
ret = -ENODEV;
/* Probe for all the NSC chipsets we know about */
for (chip = chips; chip->name ; chip++) {
IRDA_DEBUG(2, "%s(), Probing for %s ...\n", __func__,
chip->name);
/* Try all config registers for this chip */
for (cfg = 0; cfg < ARRAY_SIZE(chip->cfg); cfg++) {
cfg_base = chip->cfg[cfg];
if (!cfg_base)
continue;
/* Read index register */
reg = inb(cfg_base);
if (reg == 0xff) {
IRDA_DEBUG(2, "%s() no chip at 0x%03x\n", __func__, 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, "%s() Found %s chip, revision=%d\n",
__func__, chip->name, id & ~chip->cid_mask);
/*
* If we found a correct PnP setting,
* we first try it.
*/
if (pnp_succeeded) {
memset(&info, 0, sizeof(chipio_t));
info.cfg_base = cfg_base;
info.fir_base = pnp_info.fir_base;
info.dma = pnp_info.dma;
info.irq = pnp_info.irq;
if (info.fir_base < 0x2000) {
IRDA_MESSAGE("%s, chip->init\n", driver_name);
chip->init(chip, &info);
} else
chip->probe(chip, &info);
if (nsc_ircc_open(&info) >= 0)
ret = 0;
}
/*
* Opening based on PnP values failed.
* Let's fallback to user values, or probe
* the chip.
*/
if (ret) {
IRDA_DEBUG(2, "%s, PnP init failed\n", driver_name);
memset(&info, 0, sizeof(chipio_t));
info.cfg_base = cfg_base;
info.fir_base = io[i];
info.dma = dma[i];
info.irq = irq[i];
/*
* 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(&info) >= 0)
ret = 0;
}
i++;
} else {
IRDA_DEBUG(2, "%s(), Wrong chip id=0x%02x\n", __func__, id);
}
}
}
if (ret) {
platform_driver_unregister(&nsc_ircc_driver);
pnp_unregister_driver(&nsc_ircc_pnp_driver);
pnp_registered = 0;
}
return ret;
}
/*
* Function nsc_ircc_cleanup ()
*
* Close all configured chips
*
*/
static void __exit nsc_ircc_cleanup(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(dev_self); i++) {
if (dev_self[i])
nsc_ircc_close(dev_self[i]);
}
platform_driver_unregister(&nsc_ircc_driver);
if (pnp_registered)
pnp_unregister_driver(&nsc_ircc_pnp_driver);
pnp_registered = 0;
}
static const struct net_device_ops nsc_ircc_sir_ops = {
.ndo_open = nsc_ircc_net_open,
.ndo_stop = nsc_ircc_net_close,
.ndo_start_xmit = nsc_ircc_hard_xmit_sir,
.ndo_do_ioctl = nsc_ircc_net_ioctl,
};
static const struct net_device_ops nsc_ircc_fir_ops = {
.ndo_open = nsc_ircc_net_open,
.ndo_stop = nsc_ircc_net_close,
.ndo_start_xmit = nsc_ircc_hard_xmit_fir,
.ndo_do_ioctl = nsc_ircc_net_ioctl,
};
/*
* Function nsc_ircc_open (iobase, irq)
*
* Open driver instance
*
*/
static int __init nsc_ircc_open(chipio_t *info)
{
struct net_device *dev;
struct nsc_ircc_cb *self;
void *ret;
int err, chip_index;
IRDA_DEBUG(2, "%s()\n", __func__);
for (chip_index = 0; chip_index < ARRAY_SIZE(dev_self); chip_index++) {
if (!dev_self[chip_index])
break;
}
if (chip_index == ARRAY_SIZE(dev_self)) {
IRDA_ERROR("%s(), maximum number of supported chips reached!\n", __func__);
return -ENOMEM;
}
IRDA_MESSAGE("%s, Found chip at base=0x%03x\n", driver_name,
info->cfg_base);
if ((nsc_ircc_setup(info)) == -1)
return -1;
IRDA_MESSAGE("%s, driver loaded (Dag Brattli)\n", driver_name);
dev = alloc_irdadev(sizeof(struct nsc_ircc_cb));
if (dev == NULL) {
IRDA_ERROR("%s(), can't allocate memory for "
"control block!\n", __func__);
return -ENOMEM;
}
self = netdev_priv(dev);
self->netdev = dev;
spin_lock_init(&self->lock);
/* Need to store self somewhere */
dev_self[chip_index] = self;
self->index = chip_index;
/* 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) {
IRDA_WARNING("%s(), can't get iobase of 0x%03x\n",
__func__, self->io.fir_base);
err = -ENODEV;
goto out1;
}
/* 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);
/* 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 =
dma_alloc_coherent(NULL, self->rx_buff.truesize,
&self->rx_buff_dma, GFP_KERNEL);
if (self->rx_buff.head == NULL) {
err = -ENOMEM;
goto 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 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;
/* Override the network functions we need to use */
dev->netdev_ops = &nsc_ircc_sir_ops;
err = register_netdev(dev);
if (err) {
IRDA_ERROR("%s(), register_netdev() failed!\n", __func__);
goto out4;
}
IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);
/* Check if user has supplied a valid dongle id or not */
if ((dongle_id <= 0) ||
(dongle_id >= ARRAY_SIZE(dongle_types))) {
dongle_id = nsc_ircc_read_dongle_id(self->io.fir_base);
IRDA_MESSAGE("%s, Found dongle: %s\n", driver_name,
dongle_types[dongle_id]);
} else {
IRDA_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);
self->pldev = platform_device_register_simple(NSC_IRCC_DRIVER_NAME,
self->index, NULL, 0);
if (IS_ERR(self->pldev)) {
err = PTR_ERR(self->pldev);
goto out5;
}
platform_set_drvdata(self->pldev, self);
return chip_index;
out5:
unregister_netdev(dev);
out4:
dma_free_coherent(NULL, self->tx_buff.truesize,
self->tx_buff.head, self->tx_buff_dma);
out3:
dma_free_coherent(NULL, self->rx_buff.truesize,
self->rx_buff.head, self->rx_buff_dma);
out2:
release_region(self->io.fir_base, self->io.fir_ext);
out1:
free_netdev(dev);
dev_self[chip_index] = NULL;
return err;
}
/*
* Function nsc_ircc_close (self)
*
* Close driver instance
*
*/
static int __exit nsc_ircc_close(struct nsc_ircc_cb *self)
{
int iobase;
IRDA_DEBUG(4, "%s()\n", __func__);
IRDA_ASSERT(self != NULL, return -1;);
iobase = self->io.fir_base;
platform_device_unregister(self->pldev);
/* Remove netdevice */
unregister_netdev(self->netdev);
/* Release the PORT that this driver is using */
IRDA_DEBUG(4, "%s(), Releasing Region %03x\n",
__func__, 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 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(CFG_108_BAIC, 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: IRDA_ERROR("%s(), invalid base_address", __func__);
}
/* 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: IRDA_ERROR("%s(), invalid irq", __func__);
}
outb(CFG_108_CSRT, 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: IRDA_ERROR("%s(), invalid dma", __func__);
}
outb(CFG_108_MCTL, 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_108_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, "%s(), probing fir_base=0x%03x\n", __func__,
info->fir_base);
/* Read control signals routing register (CSRT) */
outb(CFG_108_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, "%s(), probing irq=%d\n", __func__, 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, "%s(), probing dma=%d\n", __func__, info->dma);
/* Read mode control register (MCTL) */
outb(CFG_108_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 function enable register (FER) */
outb(CFG_338_FER, cfg_base);
reg = inb(cfg_base+1);
info->enabled = (reg >> 2) & 0x01;
/* Check if we are in Legacy or PnP mode */
outb(CFG_338_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_338_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_338_PNP1, cfg_base);
reg = inb(cfg_base+1);
info->irq = reg >> 4;
/* Read PnP register 3 (PNP3) */
outb(CFG_338_PNP3, cfg_base);
reg = inb(cfg_base+1);
info->dma = (reg & 0x07) - 1;
/* Read power and test register (PTR) */
outb(CFG_338_PTR, cfg_base);
reg = inb(cfg_base+1);
info->suspended = reg & 0x01;
return 0;
}
/*
* Function nsc_ircc_init_39x (chip, info)
*
* Now that we know it's a '39x (see probe below), we need to
* configure it so we can use it.
*
* The NSC '338 chip is a Super I/O chip with a "bank" architecture,
* the configuration of the different functionality (serial, parallel,
* floppy...) are each in a different bank (Logical Device Number).
* The base address, irq and dma configuration registers are common
* to all functionalities (index 0x30 to 0x7F).
* There is only one configuration register specific to the
* serial port, CFG_39X_SPC.
* JeanII
*
* Note : this code was written by Jan Frey <janfrey@web.de>
*/
static int nsc_ircc_init_39x(nsc_chip_t *chip, chipio_t *info)
{
int cfg_base = info->cfg_base;
int enabled;
/* User is sure about his config... accept it. */
IRDA_DEBUG(2, "%s(): nsc_ircc_init_39x (user settings): "
"io=0x%04x, irq=%d, dma=%d\n",
__func__, info->fir_base, info->irq, info->dma);
/* Access bank for SP2 */
outb(CFG_39X_LDN, cfg_base);
outb(0x02, cfg_base+1);
/* Configure SP2 */
/* We want to enable the device if not enabled */
outb(CFG_39X_ACT, cfg_base);
enabled = inb(cfg_base+1) & 0x01;
if (!enabled) {
/* Enable the device */
outb(CFG_39X_SIOCF1, cfg_base);
outb(0x01, cfg_base+1);
/* May want to update info->enabled. Jean II */
}
/* Enable UART bank switching (bit 7) ; Sets the chip to normal
* power mode (wake up from sleep mode) (bit 1) */
outb(CFG_39X_SPC, cfg_base);
outb(0x82, cfg_base+1);
return 0;
}
/*
* Function nsc_ircc_probe_39x (chip, info)
*
* Test if we really have a '39x chip at the given address
*
* Note : this code was written by Jan Frey <janfrey@web.de>
*/
static int nsc_ircc_probe_39x(nsc_chip_t *chip, chipio_t *info)
{
int cfg_base = info->cfg_base;
int reg1, reg2, irq, irqt, dma1, dma2;
int enabled, susp;
IRDA_DEBUG(2, "%s(), nsc_ircc_probe_39x, base=%d\n",
__func__, cfg_base);
/* This function should be executed with irq off to avoid
* another driver messing with the Super I/O bank - Jean II */
/* Access bank for SP2 */
outb(CFG_39X_LDN, cfg_base);
outb(0x02, cfg_base+1);
/* Read infos about SP2 ; store in info struct */
outb(CFG_39X_BASEH, cfg_base);
reg1 = inb(cfg_base+1);
outb(CFG_39X_BASEL, cfg_base);
reg2 = inb(cfg_base+1);
info->fir_base = (reg1 << 8) | reg2;
outb(CFG_39X_IRQNUM, cfg_base);
irq = inb(cfg_base+1);
outb(CFG_39X_IRQSEL, cfg_base);
irqt = inb(cfg_base+1);
info->irq = irq;
outb(CFG_39X_DMA0, cfg_base);
dma1 = inb(cfg_base+1);
outb(CFG_39X_DMA1, cfg_base);
dma2 = inb(cfg_base+1);
info->dma = dma1 -1;
outb(CFG_39X_ACT, cfg_base);
info->enabled = enabled = inb(cfg_base+1) & 0x01;
outb(CFG_39X_SPC, cfg_base);
susp = 1 - ((inb(cfg_base+1) & 0x02) >> 1);
IRDA_DEBUG(2, "%s(): io=0x%02x%02x, irq=%d (type %d), rxdma=%d, txdma=%d, enabled=%d (suspended=%d)\n", __func__, reg1,reg2,irq,irqt,dma1,dma2,enabled,susp);
/* Configure SP2 */
/* We want to enable the device if not enabled */
outb(CFG_39X_ACT, cfg_base);
enabled = inb(cfg_base+1) & 0x01;
if (!enabled) {
/* Enable the device */
outb(CFG_39X_SIOCF1, cfg_base);
outb(0x01, cfg_base+1);
/* May want to update info->enabled. Jean II */
}
/* Enable UART bank switching (bit 7) ; Sets the chip to normal
* power mode (wake up from sleep mode) (bit 1) */
outb(CFG_39X_SPC, cfg_base);
outb(0x82, cfg_base+1);
return 0;
}
#ifdef CONFIG_PNP
/* PNP probing */
static int nsc_ircc_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *id)
{
memset(&pnp_info, 0, sizeof(chipio_t));
pnp_info.irq = -1;
pnp_info.dma = -1;
pnp_succeeded = 1;
if (id->driver_data & NSC_FORCE_DONGLE_TYPE9)
dongle_id = 0x9;
/* There doesn't seem to be any way of getting the cfg_base.
* On my box, cfg_base is in the PnP descriptor of the
* motherboard. Oh well... Jean II */
if (pnp_port_valid(dev, 0) &&
!(pnp_port_flags(dev, 0) & IORESOURCE_DISABLED))
pnp_info.fir_base = pnp_port_start(dev, 0);
if (pnp_irq_valid(dev, 0) &&
!(pnp_irq_flags(dev, 0) & IORESOURCE_DISABLED))
pnp_info.irq = pnp_irq(dev, 0);
if (pnp_dma_valid(dev, 0) &&
!(pnp_dma_flags(dev, 0) & IORESOURCE_DISABLED))
pnp_info.dma = pnp_dma(dev, 0);
IRDA_DEBUG(0, "%s() : From PnP, found firbase 0x%03X ; irq %d ; dma %d.\n",
__func__, pnp_info.fir_base, pnp_info.irq, pnp_info.dma);
if((pnp_info.fir_base == 0) ||
(pnp_info.irq == -1) || (pnp_info.dma == -1)) {
/* Returning an error will disable the device. Yuck ! */
//return -EINVAL;
pnp_succeeded = 0;
}
return 0;
}
#endif
/*
* 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);
IRDA_DEBUG(2, "%s() Driver %s Found chip version %02x\n",
__func__, driver_name, version);
/* Should be 0x2? */
if (0x20 != (version & 0xf0)) {
IRDA_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, "%s(), %s not defined by irda yet\n",
__func__, dongle_types[dongle_id]);
break;
case 0x02: /* same as */
case 0x03: /* Reserved */
IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
__func__, dongle_types[dongle_id]);
break;
case 0x04: /* Sharp RY5HD01 */
break;
case 0x05: /* Reserved, but this is what the Thinkpad reports */
IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
__func__, dongle_types[dongle_id]);
break;
case 0x06: /* Single-ended serial interface */
IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
__func__, dongle_types[dongle_id]);
break;
case 0x07: /* Consumer-IR only */
IRDA_DEBUG(0, "%s(), %s is not for IrDA mode\n",
__func__, dongle_types[dongle_id]);
break;
case 0x08: /* HP HSDL-2300, HP HSDL-3600/HSDL-3610 */
IRDA_DEBUG(0, "%s(), %s\n",
__func__, 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, "%s(), %s not defined by irda yet\n",
__func__, 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, "%s(), %s\n",
__func__, dongle_types[dongle_id]);
switch_bank(iobase, BANK0);
outb(0x62, iobase+MCR);
break;
default:
IRDA_DEBUG(0, "%s(), invalid dongle_id %#x",
__func__, 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)
{
__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, "%s(), %s not defined by irda yet\n",
__func__, dongle_types[dongle_id]);
break;
case 0x02: /* same as */
case 0x03: /* Reserved */
IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
__func__, dongle_types[dongle_id]);
break;
case 0x04: /* Sharp RY5HD01 */
break;
case 0x05: /* Reserved */
IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
__func__, dongle_types[dongle_id]);
break;
case 0x06: /* Single-ended serial interface */
IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
__func__, dongle_types[dongle_id]);
break;
case 0x07: /* Consumer-IR only */
IRDA_DEBUG(0, "%s(), %s is not for IrDA mode\n",
__func__, dongle_types[dongle_id]);
break;
case 0x08: /* HP HSDL-2300, HP HSDL-3600/HSDL-3610 */
IRDA_DEBUG(0, "%s(), %s\n",
__func__, 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) {
/* There was a cli() there, but we now are already
* under spin_lock_irqsave() - JeanII */
outb(0x81, iobase+4);
outb(0x80, iobase+4);
} else
outb(0x00, iobase+4);
break;
case 0x0A: /* same as */
case 0x0B: /* Reserved */
IRDA_DEBUG(0, "%s(), %s not defined by irda yet\n",
__func__, 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, "%s(), %s is not for IrDA mode\n",
__func__, dongle_types[dongle_id]);
switch_bank(iobase, BANK0);
outb(0x62, iobase+MCR);
break;
default:
IRDA_DEBUG(0, "%s(), invalid data_rate\n", __func__);
}
/* Restore bank register */
outb(bank, iobase+BSR);
}
/*
* Function nsc_ircc_change_speed (self, baud)
*
* Change the speed of the device
*
* This function *must* be called with irq off and spin-lock.
*/
static __u8 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;
__u8 ier; /* Interrupt enable register */
IRDA_DEBUG(2, "%s(), speed=%d\n", __func__, speed);
IRDA_ASSERT(self != NULL, return 0;);
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, "%s(), handling baud of 576000\n", __func__);
break;
case 1152000:
mcr = MCR_MIR;
IRDA_DEBUG(0, "%s(), handling baud of 1152000\n", __func__);
break;
case 4000000:
mcr = MCR_FIR;
IRDA_DEBUG(0, "%s(), handling baud of 4000000\n", __func__);
break;
default:
mcr = MCR_FIR;
IRDA_DEBUG(0, "%s(), unknown baud rate of %d\n",
__func__, 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->netdev_ops = &nsc_ircc_fir_ops;
ier = IER_SFIF_IE;
nsc_ircc_dma_receive(self);
} else {
/* Install SIR xmit handler */
dev->netdev_ops = &nsc_ircc_sir_ops;
ier = IER_RXHDL_IE;
}
/* Set our current interrupt mask */
outb(ier, iobase+IER);
/* Restore BSR */
outb(bank, iobase+BSR);
/* Make sure interrupt handlers keep the proper interrupt mask */
return ier;
}
/*
* Function nsc_ircc_hard_xmit (skb, dev)
*
* Transmit the frame!
*
*/
static netdev_tx_t 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 = netdev_priv(dev);
IRDA_ASSERT(self != NULL, return NETDEV_TX_OK;);
iobase = self->io.fir_base;
netif_stop_queue(dev);
/* Make sure tests *& speed change are atomic */
spin_lock_irqsave(&self->lock, flags);
/* 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) {
/* If we just sent a frame, we get called before
* the last bytes get out (because of the SIR FIFO).
* If this is the case, let interrupt handler change
* the speed itself... Jean II */
if (self->io.direction == IO_RECV) {
nsc_ircc_change_speed(self, speed);
/* TODO : For SIR->SIR, the next packet
* may get corrupted - Jean II */
netif_wake_queue(dev);
} else {
self->new_speed = speed;
/* Queue will be restarted after speed change
* to make sure packets gets through the
* proper xmit handler - Jean II */
}
dev->trans_start = jiffies;
spin_unlock_irqrestore(&self->lock, flags);
dev_kfree_skb(skb);
return NETDEV_TX_OK;
} else
self->new_speed = speed;
}
/* 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);
dev->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);
dev->trans_start = jiffies;
spin_unlock_irqrestore(&self->lock, flags);
dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
static netdev_tx_t 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 = netdev_priv(dev);
iobase = self->io.fir_base;
netif_stop_queue(dev);
/* Make sure tests *& speed change are atomic */
spin_lock_irqsave(&self->lock, flags);
/* 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) {
/* If we are currently transmitting, defer to
* interrupt handler. - Jean II */
if(self->tx_fifo.len == 0) {
nsc_ircc_change_speed(self, speed);
netif_wake_queue(dev);
} else {
self->new_speed = speed;
/* Keep queue stopped :
* the speed change operation may change the
* xmit handler, and we want to make sure
* the next packet get through the proper
* Tx path, so block the Tx queue until
* the speed change has been done.
* Jean II */
}
dev->trans_start = jiffies;
spin_unlock_irqrestore(&self->lock, flags);
dev_kfree_skb(skb);
return NETDEV_TX_OK;
} else {
/* Change speed after current frame */
self->new_speed = speed;
}
}
/* 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;
dev->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++;
/* 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,
* and if we don't need to change speed */
if ((self->tx_fifo.free < MAX_TX_WINDOW) && (self->new_speed == 0))
netif_wake_queue(self->netdev);
/* Restore bank register */
outb(bank, iobase+BSR);
dev->trans_start = jiffies;
spin_unlock_irqrestore(&self->lock, flags);
dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
/*
* 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);
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);
/* 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, "%s()\n", __func__);
/* Save current bank */
bank = inb(iobase+BSR);
switch_bank(iobase, BANK0);
if (!(inb_p(iobase+LSR) & LSR_TXEMP)) {
IRDA_DEBUG(4, "%s(), warning, FIFO not empty yet!\n",
__func__);
/* 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, "%s(), fifo_size %d ; %d sent of %d\n",
__func__, 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, "%s()\n", __func__);
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 underrun! */
if (inb(iobase+ASCR) & ASCR_TXUR) {
self->netdev->stats.tx_errors++;
self->netdev->stats.tx_fifo_errors++;
/* Clear bit, by writing 1 into it */
outb(ASCR_TXUR, iobase+ASCR);
} else {
self->netdev->stats.tx_packets++;
}
/* 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 and
* that we don't need to change speed */
if ((self->tx_fifo.free < MAX_TX_WINDOW) && (self->new_speed == 0)) {
/* 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;
irda_setup_dma(self->io.dma, self->rx_buff_dma, 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, "%s(), window is full!\n", __func__);
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->netdev->stats.rx_errors += len;
} else {
/* Skip frame */
self->netdev->stats.rx_errors++;
self->rx_buff.data += len;
if (status & FRM_ST_MAX_LEN)
self->netdev->stats.rx_length_errors++;
if (status & FRM_ST_PHY_ERR)
self->netdev->stats.rx_frame_errors++;
if (status & FRM_ST_BAD_CRC)
self->netdev->stats.rx_crc_errors++;
}
/* The errors below can be reported in both cases */
if (status & FRM_ST_OVR1)
self->netdev->stats.rx_fifo_errors++;
if (status & FRM_ST_OVR2)
self->netdev->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) {
IRDA_WARNING("%s(), memory squeeze, "
"dropping frame.\n",
__func__);
self->netdev->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);
skb_copy_to_linear_data(skb,
self->rx_buff.data,
len - 2);
} else {
skb_put(skb, len-4);
skb_copy_to_linear_data(skb,
self->rx_buff.data,
len - 4);
}
/* Move to next frame */
self->rx_buff.data += len;
self->netdev->stats.rx_bytes += len;
self->netdev->stats.rx_packets++;
skb->dev = self->netdev;
skb_reset_mac_header(skb);
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->netdev->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->netdev->stats.tx_packets++;
netif_wake_queue(self->netdev);
self->ier = IER_TXEMP_IE;
}
}
/* Check if transmission has completed */
if (eir & EIR_TXEMP_EV) {
/* Turn around and get ready to receive some data */
self->io.direction = IO_RECV;
self->ier = IER_RXHDL_IE;
/* Check if we need to change the speed?
* Need to be after self->io.direction to avoid race with
* nsc_ircc_hard_xmit_sir() - Jean II */
if (self->new_speed) {
IRDA_DEBUG(2, "%s(), Changing speed!\n", __func__);
self->ier = nsc_ircc_change_speed(self,
self->new_speed);
self->new_speed = 0;
netif_wake_queue(self->netdev);
/* Check if we are going to FIR */
if (self->io.speed > 115200) {
/* No need to do anymore SIR stuff */
return;
}
}
}
/* 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)) {
if(self->new_speed != 0) {
/* As we stop the Tx queue, the speed change
* need to be done when the Tx fifo is
* empty. Ask for a Tx done interrupt */
self->ier = IER_TXEMP_IE;
} else {
/* 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
IRDA_WARNING("%s(), potential "
"Tx queue lockup !\n",
__func__);
}
} else {
/* Not finished yet, so interrupt on DMA again */
self->ier = IER_DMA_IE;
}
} else if (eir & EIR_TXEMP_EV) {
/* The Tx FIFO has totally drained out, so now we can change
* the speed... - Jean II */
self->ier = nsc_ircc_change_speed(self, self->new_speed);
self->new_speed = 0;
netif_wake_queue(self->netdev);
/* Note : nsc_ircc_change_speed() restarted Rx fifo */
}
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 irqreturn_t nsc_ircc_interrupt(int irq, void *dev_id)
{
struct net_device *dev = dev_id;
struct nsc_ircc_cb *self;
__u8 bsr, eir;
int iobase;
self = netdev_priv(dev);
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);
return IRQ_RETVAL(eir);
}
/*
* 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;
IRDA_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_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, "%s()\n", __func__);
IRDA_ASSERT(dev != NULL, return -1;);
self = netdev_priv(dev);
IRDA_ASSERT(self != NULL, return 0;);
iobase = self->io.fir_base;
if (request_irq(self->io.irq, nsc_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, 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);
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, "%s()\n", __func__);
IRDA_ASSERT(dev != NULL, return -1;);
self = netdev_priv(dev);
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;
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);
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;
IRDA_ASSERT(dev != NULL, return -1;);
self = netdev_priv(dev);
IRDA_ASSERT(self != NULL, return -1;);
IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __func__, dev->name, cmd);
switch (cmd) {
case SIOCSBANDWIDTH: /* Set bandwidth */
if (!capable(CAP_NET_ADMIN)) {
ret = -EPERM;
break;
}
spin_lock_irqsave(&self->lock, flags);
nsc_ircc_change_speed(self, irq->ifr_baudrate);
spin_unlock_irqrestore(&self->lock, flags);
break;
case SIOCSMEDIABUSY: /* Set media busy */
if (!capable(CAP_NET_ADMIN)) {
ret = -EPERM;
break;
}
irda_device_set_media_busy(self->netdev, TRUE);
break;
case SIOCGRECEIVING: /* Check if we are receiving right now */
/* This is already protected */
irq->ifr_receiving = nsc_ircc_is_receiving(self);
break;
default:
ret = -EOPNOTSUPP;
}
return ret;
}
static int nsc_ircc_suspend(struct platform_device *dev, pm_message_t state)
{
struct nsc_ircc_cb *self = platform_get_drvdata(dev);
int bank;
unsigned long flags;
int iobase = self->io.fir_base;
if (self->io.suspended)
return 0;
IRDA_DEBUG(1, "%s, Suspending\n", driver_name);
rtnl_lock();
if (netif_running(self->netdev)) {
netif_device_detach(self->netdev);
spin_lock_irqsave(&self->lock, flags);
/* Save current bank */
bank = inb(iobase+BSR);
/* Disable interrupts */
switch_bank(iobase, BANK0);
outb(0, iobase+IER);
/* Restore bank register */
outb(bank, iobase+BSR);
spin_unlock_irqrestore(&self->lock, flags);
free_irq(self->io.irq, self->netdev);
disable_dma(self->io.dma);
}
self->io.suspended = 1;
rtnl_unlock();
return 0;
}
static int nsc_ircc_resume(struct platform_device *dev)
{
struct nsc_ircc_cb *self = platform_get_drvdata(dev);
unsigned long flags;
if (!self->io.suspended)
return 0;
IRDA_DEBUG(1, "%s, Waking up\n", driver_name);
rtnl_lock();
nsc_ircc_setup(&self->io);
nsc_ircc_init_dongle_interface(self->io.fir_base, self->io.dongle_id);
if (netif_running(self->netdev)) {
if (request_irq(self->io.irq, nsc_ircc_interrupt, 0,
self->netdev->name, self->netdev)) {
IRDA_WARNING("%s, unable to allocate irq=%d\n",
driver_name, self->io.irq);
/*
* Don't fail resume process, just kill this
* network interface
*/
unregister_netdevice(self->netdev);
} else {
spin_lock_irqsave(&self->lock, flags);
nsc_ircc_change_speed(self, self->io.speed);
spin_unlock_irqrestore(&self->lock, flags);
netif_device_attach(self->netdev);
}
} else {
spin_lock_irqsave(&self->lock, flags);
nsc_ircc_change_speed(self, 9600);
spin_unlock_irqrestore(&self->lock, flags);
}
self->io.suspended = 0;
rtnl_unlock();
return 0;
}
MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
MODULE_DESCRIPTION("NSC IrDA Device Driver");
MODULE_LICENSE("GPL");
module_param(qos_mtt_bits, int, 0);
MODULE_PARM_DESC(qos_mtt_bits, "Minimum Turn Time");
module_param_array(io, int, NULL, 0);
MODULE_PARM_DESC(io, "Base I/O addresses");
module_param_array(irq, int, NULL, 0);
MODULE_PARM_DESC(irq, "IRQ lines");
module_param_array(dma, int, NULL, 0);
MODULE_PARM_DESC(dma, "DMA channels");
module_param(dongle_id, int, 0);
MODULE_PARM_DESC(dongle_id, "Type-id of used dongle");
module_init(nsc_ircc_init);
module_exit(nsc_ircc_cleanup);
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