smsc-ircc2.c 59.6 KB
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/*********************************************************************
 * $Id: smsc-ircc2.c,v 1.19.2.5 2002/10/27 11:34:26 dip Exp $
 *
 * Description:   Driver for the SMC Infrared Communications Controller
 * Status:        Experimental.
 * Author:        Daniele Peri (peri@csai.unipa.it)
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 * Created at:
 * Modified at:
 * Modified by:
 *
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 *     Copyright (c) 2002      Daniele Peri
 *     All Rights Reserved.
 *     Copyright (c) 2002      Jean Tourrilhes
 *
 *
 * Based on smc-ircc.c:
 *
 *     Copyright (c) 2001      Stefani Seibold
 *     Copyright (c) 1999-2001 Dag Brattli
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 *     Copyright (c) 1998-1999 Thomas Davis,
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 *
 *	and irport.c:
 *
 *     Copyright (c) 1997, 1998, 1999-2000 Dag Brattli, All Rights Reserved.
 *
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 *
 *     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
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 *     the License, or (at your option) any later version.
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 *
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 *     This program is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *     GNU General Public License for more details.
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 *
 *     You should have received a copy of the GNU General Public License
 *     along with this program; if not, write to the Free Software
 *     Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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 *     MA 02111-1307 USA
 *
 ********************************************************************/

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/rtnetlink.h>
#include <linux/serial_reg.h>
#include <linux/dma-mapping.h>

#include <asm/io.h>
#include <asm/dma.h>
#include <asm/byteorder.h>

#include <linux/spinlock.h>
#include <linux/pm.h>

#include <net/irda/wrapper.h>
#include <net/irda/irda.h>
#include <net/irda/irda_device.h>

#include "smsc-ircc2.h"
#include "smsc-sio.h"

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MODULE_AUTHOR("Daniele Peri <peri@csai.unipa.it>");
MODULE_DESCRIPTION("SMC IrCC SIR/FIR controller driver");
MODULE_LICENSE("GPL");


static int ircc_dma = 255;
module_param(ircc_dma, int, 0);
MODULE_PARM_DESC(ircc_dma, "DMA channel");

static int ircc_irq = 255;
module_param(ircc_irq, int, 0);
MODULE_PARM_DESC(ircc_irq, "IRQ line");

static int ircc_fir;
module_param(ircc_fir, int, 0);
MODULE_PARM_DESC(ircc_fir, "FIR Base Address");

static int ircc_sir;
module_param(ircc_sir, int, 0);
MODULE_PARM_DESC(ircc_sir, "SIR Base Address");

static int ircc_cfg;
module_param(ircc_cfg, int, 0);
MODULE_PARM_DESC(ircc_cfg, "Configuration register base address");

static int ircc_transceiver;
module_param(ircc_transceiver, int, 0);
MODULE_PARM_DESC(ircc_transceiver, "Transceiver type");

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/* Types */

struct smsc_transceiver {
	char *name;
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	void (*set_for_speed)(int fir_base, u32 speed);
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	int  (*probe)(int fir_base);
};

struct smsc_chip {
	char *name;
	#if 0
	u8	type;
	#endif
	u16 flags;
	u8 devid;
	u8 rev;
};

struct smsc_chip_address {
	unsigned int cfg_base;
	unsigned int type;
};

/* Private data for each instance */
struct smsc_ircc_cb {
	struct net_device *netdev;     /* Yes! we are some kind of netdevice */
	struct net_device_stats stats;
	struct irlap_cb    *irlap; /* The link layer we are binded to */
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	chipio_t io;               /* IrDA controller information */
	iobuff_t tx_buff;          /* Transmit buffer */
	iobuff_t rx_buff;          /* Receive buffer */
	dma_addr_t tx_buff_dma;
	dma_addr_t rx_buff_dma;

	struct qos_info qos;       /* QoS capabilities for this device */

	spinlock_t lock;           /* For serializing operations */
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	__u32 new_speed;
	__u32 flags;               /* Interface flags */

	int tx_buff_offsets[10];   /* Offsets between frames in tx_buff */
	int tx_len;                /* Number of frames in tx_buff */

	int transceiver;
	struct pm_dev *pmdev;
};

/* Constants */

static const char *driver_name = "smsc-ircc2";
#define SMSC_IRCC2_C_IRDA_FALLBACK_SPEED	9600
#define SMSC_IRCC2_C_DEFAULT_TRANSCEIVER	1
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#define SMSC_IRCC2_C_NET_TIMEOUT		0
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#define SMSC_IRCC2_C_SIR_STOP			0

/* Prototypes */

static int smsc_ircc_open(unsigned int firbase, unsigned int sirbase, u8 dma, u8 irq);
static int smsc_ircc_present(unsigned int fir_base, unsigned int sir_base);
static void smsc_ircc_setup_io(struct smsc_ircc_cb *self, unsigned int fir_base, unsigned int sir_base, u8 dma, u8 irq);
static void smsc_ircc_setup_qos(struct smsc_ircc_cb *self);
static void smsc_ircc_init_chip(struct smsc_ircc_cb *self);
static int __exit smsc_ircc_close(struct smsc_ircc_cb *self);
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static int  smsc_ircc_dma_receive(struct smsc_ircc_cb *self);
static void smsc_ircc_dma_receive_complete(struct smsc_ircc_cb *self);
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static void smsc_ircc_sir_receive(struct smsc_ircc_cb *self);
static int  smsc_ircc_hard_xmit_sir(struct sk_buff *skb, struct net_device *dev);
static int  smsc_ircc_hard_xmit_fir(struct sk_buff *skb, struct net_device *dev);
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static void smsc_ircc_dma_xmit(struct smsc_ircc_cb *self, int bofs);
static void smsc_ircc_dma_xmit_complete(struct smsc_ircc_cb *self);
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static void smsc_ircc_change_speed(void *priv, u32 speed);
static void smsc_ircc_set_sir_speed(void *priv, u32 speed);
static irqreturn_t smsc_ircc_interrupt(int irq, void *dev_id, struct pt_regs *regs);
static irqreturn_t smsc_ircc_interrupt_sir(struct net_device *dev);
static void smsc_ircc_sir_start(struct smsc_ircc_cb *self);
#if SMSC_IRCC2_C_SIR_STOP
static void smsc_ircc_sir_stop(struct smsc_ircc_cb *self);
#endif
static void smsc_ircc_sir_write_wakeup(struct smsc_ircc_cb *self);
static int  smsc_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len);
static int  smsc_ircc_net_open(struct net_device *dev);
static int  smsc_ircc_net_close(struct net_device *dev);
static int  smsc_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
#if SMSC_IRCC2_C_NET_TIMEOUT
static void smsc_ircc_timeout(struct net_device *dev);
#endif
static struct net_device_stats *smsc_ircc_net_get_stats(struct net_device *dev);
static int  smsc_ircc_pmproc(struct pm_dev *dev, pm_request_t rqst, void *data);
static int smsc_ircc_is_receiving(struct smsc_ircc_cb *self);
static void smsc_ircc_probe_transceiver(struct smsc_ircc_cb *self);
static void smsc_ircc_set_transceiver_for_speed(struct smsc_ircc_cb *self, u32 speed);
static void smsc_ircc_sir_wait_hw_transmitter_finish(struct smsc_ircc_cb *self);

/* Probing */
static int __init smsc_ircc_look_for_chips(void);
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static const struct smsc_chip * __init smsc_ircc_probe(unsigned short cfg_base, u8 reg, const struct smsc_chip *chip, char *type);
static int __init smsc_superio_flat(const struct smsc_chip *chips, unsigned short cfg_base, char *type);
static int __init smsc_superio_paged(const struct smsc_chip *chips, unsigned short cfg_base, char *type);
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static int __init smsc_superio_fdc(unsigned short cfg_base);
static int __init smsc_superio_lpc(unsigned short cfg_base);

/* Transceivers specific functions */

static void smsc_ircc_set_transceiver_toshiba_sat1800(int fir_base, u32 speed);
static int  smsc_ircc_probe_transceiver_toshiba_sat1800(int fir_base);
static void smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select(int fir_base, u32 speed);
static int  smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select(int fir_base);
static void smsc_ircc_set_transceiver_smsc_ircc_atc(int fir_base, u32 speed);
static int  smsc_ircc_probe_transceiver_smsc_ircc_atc(int fir_base);

/* Power Management */

static void smsc_ircc_suspend(struct smsc_ircc_cb *self);
static void smsc_ircc_wakeup(struct smsc_ircc_cb *self);
static int smsc_ircc_pmproc(struct pm_dev *dev, pm_request_t rqst, void *data);


/* Transceivers for SMSC-ircc */

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static struct smsc_transceiver smsc_transceivers[] =
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{
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	{ "Toshiba Satellite 1800 (GP data pin select)", smsc_ircc_set_transceiver_toshiba_sat1800, smsc_ircc_probe_transceiver_toshiba_sat1800 },
	{ "Fast pin select", smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select, smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select },
	{ "ATC IRMode", smsc_ircc_set_transceiver_smsc_ircc_atc, smsc_ircc_probe_transceiver_smsc_ircc_atc },
	{ NULL, NULL }
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};
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#define SMSC_IRCC2_C_NUMBER_OF_TRANSCEIVERS (ARRAY_SIZE(smsc_transceivers) - 1)
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/*  SMC SuperIO chipsets definitions */

#define	KEY55_1	0	/* SuperIO Configuration mode with Key <0x55> */
#define	KEY55_2	1	/* SuperIO Configuration mode with Key <0x55,0x55> */
#define	NoIRDA	2	/* SuperIO Chip has no IRDA Port */
#define	SIR	0	/* SuperIO Chip has only slow IRDA */
#define	FIR	4	/* SuperIO Chip has fast IRDA */
#define	SERx4	8	/* SuperIO Chip supports 115,2 KBaud * 4=460,8 KBaud */

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static struct smsc_chip __initdata fdc_chips_flat[] =
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{
	/* Base address 0x3f0 or 0x370 */
	{ "37C44",	KEY55_1|NoIRDA,		0x00, 0x00 }, /* This chip cannot be detected */
	{ "37C665GT",	KEY55_2|NoIRDA,		0x65, 0x01 },
	{ "37C665GT",	KEY55_2|NoIRDA,		0x66, 0x01 },
	{ "37C669",	KEY55_2|SIR|SERx4,	0x03, 0x02 },
	{ "37C669",	KEY55_2|SIR|SERx4,	0x04, 0x02 }, /* ID? */
	{ "37C78",	KEY55_2|NoIRDA,		0x78, 0x00 },
	{ "37N769",	KEY55_1|FIR|SERx4,	0x28, 0x00 },
	{ "37N869",	KEY55_1|FIR|SERx4,	0x29, 0x00 },
	{ NULL }
};

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static struct smsc_chip __initdata fdc_chips_paged[] =
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{
	/* Base address 0x3f0 or 0x370 */
	{ "37B72X",	KEY55_1|SIR|SERx4,	0x4c, 0x00 },
	{ "37B77X",	KEY55_1|SIR|SERx4,	0x43, 0x00 },
	{ "37B78X",	KEY55_1|SIR|SERx4,	0x44, 0x00 },
	{ "37B80X",	KEY55_1|SIR|SERx4,	0x42, 0x00 },
	{ "37C67X",	KEY55_1|FIR|SERx4,	0x40, 0x00 },
	{ "37C93X",	KEY55_2|SIR|SERx4,	0x02, 0x01 },
	{ "37C93XAPM",	KEY55_1|SIR|SERx4,	0x30, 0x01 },
	{ "37C93XFR",	KEY55_2|FIR|SERx4,	0x03, 0x01 },
	{ "37M707",	KEY55_1|SIR|SERx4,	0x42, 0x00 },
	{ "37M81X",	KEY55_1|SIR|SERx4,	0x4d, 0x00 },
	{ "37N958FR",	KEY55_1|FIR|SERx4,	0x09, 0x04 },
	{ "37N971",	KEY55_1|FIR|SERx4,	0x0a, 0x00 },
	{ "37N972",	KEY55_1|FIR|SERx4,	0x0b, 0x00 },
	{ NULL }
};

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static struct smsc_chip __initdata lpc_chips_flat[] =
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{
	/* Base address 0x2E or 0x4E */
	{ "47N227",	KEY55_1|FIR|SERx4,	0x5a, 0x00 },
	{ "47N267",	KEY55_1|FIR|SERx4,	0x5e, 0x00 },
	{ NULL }
};

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static struct smsc_chip __initdata lpc_chips_paged[] =
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{
	/* Base address 0x2E or 0x4E */
	{ "47B27X",	KEY55_1|SIR|SERx4,	0x51, 0x00 },
	{ "47B37X",	KEY55_1|SIR|SERx4,	0x52, 0x00 },
	{ "47M10X",	KEY55_1|SIR|SERx4,	0x59, 0x00 },
	{ "47M120",	KEY55_1|NoIRDA|SERx4,	0x5c, 0x00 },
	{ "47M13X",	KEY55_1|SIR|SERx4,	0x59, 0x00 },
	{ "47M14X",	KEY55_1|SIR|SERx4,	0x5f, 0x00 },
	{ "47N252",	KEY55_1|FIR|SERx4,	0x0e, 0x00 },
	{ "47S42X",	KEY55_1|SIR|SERx4,	0x57, 0x00 },
	{ NULL }
};

#define SMSCSIO_TYPE_FDC	1
#define SMSCSIO_TYPE_LPC	2
#define SMSCSIO_TYPE_FLAT	4
#define SMSCSIO_TYPE_PAGED	8

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static struct smsc_chip_address __initdata possible_addresses[] =
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{
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	{ 0x3f0, SMSCSIO_TYPE_FDC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
	{ 0x370, SMSCSIO_TYPE_FDC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
	{ 0xe0,  SMSCSIO_TYPE_FDC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
	{ 0x2e,  SMSCSIO_TYPE_LPC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
	{ 0x4e,  SMSCSIO_TYPE_LPC|SMSCSIO_TYPE_FLAT|SMSCSIO_TYPE_PAGED },
	{ 0, 0 }
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};

/* Globals */

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static struct smsc_ircc_cb *dev_self[] = { NULL, NULL };
static unsigned short dev_count;
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static inline void register_bank(int iobase, int bank)
{
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        outb(((inb(iobase + IRCC_MASTER) & 0xf0) | (bank & 0x07)),
               iobase + IRCC_MASTER);
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}


/*******************************************************************************
 *
 *
 * SMSC-ircc stuff
 *
 *
 *******************************************************************************/

/*
 * Function smsc_ircc_init ()
 *
 *    Initialize chip. Just try to find out how many chips we are dealing with
 *    and where they are
 */
static int __init smsc_ircc_init(void)
{
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	int ret = -ENODEV;
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	IRDA_DEBUG(1, "%s\n", __FUNCTION__);

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	dev_count = 0;
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	if (ircc_fir > 0 && ircc_sir > 0) {
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		IRDA_MESSAGE(" Overriding FIR address 0x%04x\n", ircc_fir);
		IRDA_MESSAGE(" Overriding SIR address 0x%04x\n", ircc_sir);

		if (smsc_ircc_open(ircc_fir, ircc_sir, ircc_dma, ircc_irq) == 0)
			return 0;

		return -ENODEV;
	}

	/* try user provided configuration register base address */
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	if (ircc_cfg > 0) {
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	        IRDA_MESSAGE(" Overriding configuration address 0x%04x\n",
			     ircc_cfg);
		if (!smsc_superio_fdc(ircc_cfg))
			ret = 0;
		if (!smsc_superio_lpc(ircc_cfg))
			ret = 0;
	}
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	if (smsc_ircc_look_for_chips() > 0)
		ret = 0;
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	return ret;
}

/*
 * Function smsc_ircc_open (firbase, sirbase, dma, irq)
 *
 *    Try to open driver instance
 *
 */
static int __init smsc_ircc_open(unsigned int fir_base, unsigned int sir_base, u8 dma, u8 irq)
{
	struct smsc_ircc_cb *self;
	struct net_device *dev;
	int err;
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	IRDA_DEBUG(1, "%s\n", __FUNCTION__);

	err = smsc_ircc_present(fir_base, sir_base);
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	if (err)
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		goto err_out;
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	err = -ENOMEM;
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	if (dev_count >= ARRAY_SIZE(dev_self)) {
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	        IRDA_WARNING("%s(), too many devices!\n", __FUNCTION__);
		goto err_out1;
	}

	/*
	 *  Allocate new instance of the driver
	 */
	dev = alloc_irdadev(sizeof(struct smsc_ircc_cb));
	if (!dev) {
		IRDA_WARNING("%s() can't allocate net device\n", __FUNCTION__);
		goto err_out1;
	}

	SET_MODULE_OWNER(dev);

	dev->hard_start_xmit = smsc_ircc_hard_xmit_sir;
#if SMSC_IRCC2_C_NET_TIMEOUT
	dev->tx_timeout	     = smsc_ircc_timeout;
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	dev->watchdog_timeo  = HZ * 2;  /* Allow enough time for speed change */
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#endif
	dev->open            = smsc_ircc_net_open;
	dev->stop            = smsc_ircc_net_close;
	dev->do_ioctl        = smsc_ircc_net_ioctl;
	dev->get_stats	     = smsc_ircc_net_get_stats;
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	self = dev->priv;
	self->netdev = dev;

	/* Make ifconfig display some details */
	dev->base_addr = self->io.fir_base = fir_base;
	dev->irq = self->io.irq = irq;

	/* Need to store self somewhere */
	dev_self[dev_count++] = self;
	spin_lock_init(&self->lock);

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	self->rx_buff.truesize = SMSC_IRCC2_RX_BUFF_TRUESIZE;
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	self->tx_buff.truesize = SMSC_IRCC2_TX_BUFF_TRUESIZE;

	self->rx_buff.head =
		dma_alloc_coherent(NULL, self->rx_buff.truesize,
				   &self->rx_buff_dma, GFP_KERNEL);
	if (self->rx_buff.head == NULL) {
		IRDA_ERROR("%s, Can't allocate memory for receive buffer!\n",
			   driver_name);
		goto err_out2;
	}

	self->tx_buff.head =
		dma_alloc_coherent(NULL, self->tx_buff.truesize,
				   &self->tx_buff_dma, GFP_KERNEL);
	if (self->tx_buff.head == NULL) {
		IRDA_ERROR("%s, Can't allocate memory for transmit buffer!\n",
			   driver_name);
		goto err_out3;
	}

	memset(self->rx_buff.head, 0, self->rx_buff.truesize);
	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;
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	smsc_ircc_setup_io(self, fir_base, sir_base, dma, irq);
	smsc_ircc_setup_qos(self);
	smsc_ircc_init_chip(self);
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	if (ircc_transceiver > 0  &&
	    ircc_transceiver < SMSC_IRCC2_C_NUMBER_OF_TRANSCEIVERS)
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		self->transceiver = ircc_transceiver;
	else
		smsc_ircc_probe_transceiver(self);

	err = register_netdev(self->netdev);
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	if (err) {
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		IRDA_ERROR("%s, Network device registration failed!\n",
			   driver_name);
		goto err_out4;
	}

	self->pmdev = pm_register(PM_SYS_DEV, PM_SYS_IRDA, smsc_ircc_pmproc);
	if (self->pmdev)
		self->pmdev->data = self;

	IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);

	return 0;
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 err_out4:
	dma_free_coherent(NULL, self->tx_buff.truesize,
			  self->tx_buff.head, self->tx_buff_dma);
 err_out3:
	dma_free_coherent(NULL, self->rx_buff.truesize,
			  self->rx_buff.head, self->rx_buff_dma);
 err_out2:
	free_netdev(self->netdev);
	dev_self[--dev_count] = NULL;
 err_out1:
	release_region(fir_base, SMSC_IRCC2_FIR_CHIP_IO_EXTENT);
	release_region(sir_base, SMSC_IRCC2_SIR_CHIP_IO_EXTENT);
 err_out:
	return err;
}

/*
 * Function smsc_ircc_present(fir_base, sir_base)
 *
 *    Check the smsc-ircc chip presence
 *
 */
static int smsc_ircc_present(unsigned int fir_base, unsigned int sir_base)
{
	unsigned char low, high, chip, config, dma, irq, version;

	if (!request_region(fir_base, SMSC_IRCC2_FIR_CHIP_IO_EXTENT,
			    driver_name)) {
		IRDA_WARNING("%s: can't get fir_base of 0x%03x\n",
			     __FUNCTION__, fir_base);
		goto out1;
	}

	if (!request_region(sir_base, SMSC_IRCC2_SIR_CHIP_IO_EXTENT,
			    driver_name)) {
		IRDA_WARNING("%s: can't get sir_base of 0x%03x\n",
			     __FUNCTION__, sir_base);
		goto out2;
	}

	register_bank(fir_base, 3);

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	high    = inb(fir_base + IRCC_ID_HIGH);
	low     = inb(fir_base + IRCC_ID_LOW);
	chip    = inb(fir_base + IRCC_CHIP_ID);
	version = inb(fir_base + IRCC_VERSION);
	config  = inb(fir_base + IRCC_INTERFACE);
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	dma     = config & IRCC_INTERFACE_DMA_MASK;
	irq     = (config & IRCC_INTERFACE_IRQ_MASK) >> 4;

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	if (high != 0x10 || low != 0xb8 || (chip != 0xf1 && chip != 0xf2)) {
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		IRDA_WARNING("%s(), addr 0x%04x - no device found!\n",
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			     __FUNCTION__, fir_base);
		goto out3;
	}
	IRDA_MESSAGE("SMsC IrDA Controller found\n IrCC version %d.%d, "
		     "firport 0x%03x, sirport 0x%03x dma=%d, irq=%d\n",
		     chip & 0x0f, version, fir_base, sir_base, dma, irq);

	return 0;
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 out3:
	release_region(sir_base, SMSC_IRCC2_SIR_CHIP_IO_EXTENT);
 out2:
	release_region(fir_base, SMSC_IRCC2_FIR_CHIP_IO_EXTENT);
 out1:
	return -ENODEV;
}

/*
 * Function smsc_ircc_setup_io(self, fir_base, sir_base, dma, irq)
 *
 *    Setup I/O
 *
 */
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static void smsc_ircc_setup_io(struct smsc_ircc_cb *self,
			       unsigned int fir_base, unsigned int sir_base,
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			       u8 dma, u8 irq)
{
	unsigned char config, chip_dma, chip_irq;

	register_bank(fir_base, 3);
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	config = inb(fir_base + IRCC_INTERFACE);
	chip_dma = config & IRCC_INTERFACE_DMA_MASK;
	chip_irq = (config & IRCC_INTERFACE_IRQ_MASK) >> 4;
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	self->io.fir_base  = fir_base;
	self->io.sir_base  = sir_base;
	self->io.fir_ext   = SMSC_IRCC2_FIR_CHIP_IO_EXTENT;
	self->io.sir_ext   = SMSC_IRCC2_SIR_CHIP_IO_EXTENT;
	self->io.fifo_size = SMSC_IRCC2_FIFO_SIZE;
	self->io.speed = SMSC_IRCC2_C_IRDA_FALLBACK_SPEED;

	if (irq < 255) {
		if (irq != chip_irq)
			IRDA_MESSAGE("%s, Overriding IRQ - chip says %d, using %d\n",
				     driver_name, chip_irq, irq);
		self->io.irq = irq;
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	} else
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		self->io.irq = chip_irq;
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	if (dma < 255) {
		if (dma != chip_dma)
			IRDA_MESSAGE("%s, Overriding DMA - chip says %d, using %d\n",
				     driver_name, chip_dma, dma);
		self->io.dma = dma;
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	} else
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		self->io.dma = chip_dma;

}

/*
 * Function smsc_ircc_setup_qos(self)
 *
 *    Setup qos
 *
 */
static void smsc_ircc_setup_qos(struct smsc_ircc_cb *self)
{
	/* Initialize QoS for this device */
	irda_init_max_qos_capabilies(&self->qos);
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	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 = SMSC_IRCC2_MIN_TURN_TIME;
	self->qos.window_size.bits = SMSC_IRCC2_WINDOW_SIZE;
	irda_qos_bits_to_value(&self->qos);
}

/*
 * Function smsc_ircc_init_chip(self)
 *
 *    Init chip
 *
 */
static void smsc_ircc_init_chip(struct smsc_ircc_cb *self)
{
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	int iobase, ir_mode, ctrl, fast;

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	IRDA_ASSERT(self != NULL, return;);
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	iobase = self->io.fir_base;
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	ir_mode = IRCC_CFGA_IRDA_SIR_A;
	ctrl = 0;
	fast = 0;

	register_bank(iobase, 0);
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	outb(IRCC_MASTER_RESET, iobase + IRCC_MASTER);
	outb(0x00, iobase + IRCC_MASTER);
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	register_bank(iobase, 1);
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	outb(((inb(iobase + IRCC_SCE_CFGA) & 0x87) | ir_mode),
	     iobase + IRCC_SCE_CFGA);
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#ifdef smsc_669 /* Uses pin 88/89 for Rx/Tx */
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	outb(((inb(iobase + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_COM),
	     iobase + IRCC_SCE_CFGB);
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#else
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	outb(((inb(iobase + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_IR),
	     iobase + IRCC_SCE_CFGB);
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#endif
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	(void) inb(iobase + IRCC_FIFO_THRESHOLD);
	outb(SMSC_IRCC2_FIFO_THRESHOLD, iobase + IRCC_FIFO_THRESHOLD);
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	register_bank(iobase, 4);
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	outb((inb(iobase + IRCC_CONTROL) & 0x30) | ctrl, iobase + IRCC_CONTROL);
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	register_bank(iobase, 0);
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	outb(fast, iobase + IRCC_LCR_A);
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	smsc_ircc_set_sir_speed(self, SMSC_IRCC2_C_IRDA_FALLBACK_SPEED);
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	/* Power on device */
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	outb(0x00, iobase + IRCC_MASTER);
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}

/*
 * Function smsc_ircc_net_ioctl (dev, rq, cmd)
 *
 *    Process IOCTL commands for this device
 *
 */
static int smsc_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
	struct if_irda_req *irq = (struct if_irda_req *) rq;
	struct smsc_ircc_cb *self;
	unsigned long flags;
	int ret = 0;

	IRDA_ASSERT(dev != NULL, return -1;);

	self = dev->priv;

	IRDA_ASSERT(self != NULL, return -1;);

	IRDA_DEBUG(2, "%s(), %s, (cmd=0x%X)\n", __FUNCTION__, dev->name, cmd);
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	switch (cmd) {
	case SIOCSBANDWIDTH: /* Set bandwidth */
		if (!capable(CAP_NET_ADMIN))
			ret = -EPERM;
                else {
			/* Make sure we are the only one touching
			 * self->io.speed and the hardware - Jean II */
			spin_lock_irqsave(&self->lock, flags);
			smsc_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 */
		irq->ifr_receiving = smsc_ircc_is_receiving(self);
		break;
	#if 0
	case SIOCSDTRRTS:
		if (!capable(CAP_NET_ADMIN)) {
			ret = -EPERM;
			break;
		}
		smsc_ircc_sir_set_dtr_rts(dev, irq->ifr_dtr, irq->ifr_rts);
		break;
	#endif
	default:
		ret = -EOPNOTSUPP;
	}
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	return ret;
}

static struct net_device_stats *smsc_ircc_net_get_stats(struct net_device *dev)
{
	struct smsc_ircc_cb *self = (struct smsc_ircc_cb *) dev->priv;
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	return &self->stats;
}

#if SMSC_IRCC2_C_NET_TIMEOUT
/*
 * Function smsc_ircc_timeout (struct net_device *dev)
 *
 *    The networking timeout management.
 *
 */

static void smsc_ircc_timeout(struct net_device *dev)
{
	struct smsc_ircc_cb *self;
	unsigned long flags;

	self = (struct smsc_ircc_cb *) dev->priv;
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	IRDA_WARNING("%s: transmit timed out, changing speed to: %d\n",
		     dev->name, self->io.speed);
	spin_lock_irqsave(&self->lock, flags);
	smsc_ircc_sir_start(self);
	smsc_ircc_change_speed(self, self->io.speed);
	dev->trans_start = jiffies;
	netif_wake_queue(dev);
	spin_unlock_irqrestore(&self->lock, flags);
}
#endif

/*
 * Function smsc_ircc_hard_xmit_sir (struct sk_buff *skb, struct net_device *dev)
 *
 *    Transmits the current frame until FIFO is full, then
 *    waits until the next transmit interrupt, and continues until the
 *    frame is transmitted.
 */
int smsc_ircc_hard_xmit_sir(struct sk_buff *skb, struct net_device *dev)
{
	struct smsc_ircc_cb *self;
	unsigned long flags;
	s32 speed;

	IRDA_DEBUG(1, "%s\n", __FUNCTION__);

	IRDA_ASSERT(dev != NULL, return 0;);
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	self = (struct smsc_ircc_cb *) dev->priv;
	IRDA_ASSERT(self != NULL, return 0;);

	netif_stop_queue(dev);
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	/* Make sure test of self->io.speed & speed change are atomic */
	spin_lock_irqsave(&self->lock, flags);

	/* Check if we need to change the speed */
	speed = irda_get_next_speed(skb);
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	if (speed != self->io.speed && speed != -1) {
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		/* Check for empty frame */
		if (!skb->len) {
			/*
			 * We send frames one by one in SIR mode (no
			 * pipelining), so at this point, if we were sending
			 * a previous frame, we just received the interrupt
			 * telling us it is finished (UART_IIR_THRI).
			 * Therefore, waiting for the transmitter to really
			 * finish draining the fifo won't take too long.
			 * And the interrupt handler is not expected to run.
			 * - Jean II */
			smsc_ircc_sir_wait_hw_transmitter_finish(self);
			smsc_ircc_change_speed(self, speed);
			spin_unlock_irqrestore(&self->lock, flags);
			dev_kfree_skb(skb);
			return 0;
		}
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		self->new_speed = speed;
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	}

	/* Init tx buffer */
	self->tx_buff.data = self->tx_buff.head;

	/* Copy skb to tx_buff while wrapping, stuffing and making CRC */
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	self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data,
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					   self->tx_buff.truesize);
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	self->stats.tx_bytes += self->tx_buff.len;

	/* Turn on transmit finished interrupt. Will fire immediately!  */
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	outb(UART_IER_THRI, self->io.sir_base + UART_IER);
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	spin_unlock_irqrestore(&self->lock, flags);

	dev_kfree_skb(skb);
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	return 0;
}

/*
 * Function smsc_ircc_set_fir_speed (self, baud)
 *
 *    Change the speed of the device
 *
 */
static void smsc_ircc_set_fir_speed(struct smsc_ircc_cb *self, u32 speed)
{
	int fir_base, ir_mode, ctrl, fast;

	IRDA_ASSERT(self != NULL, return;);
	fir_base = self->io.fir_base;

	self->io.speed = speed;

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	switch (speed) {
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	default:
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	case 576000:
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		ir_mode = IRCC_CFGA_IRDA_HDLC;
		ctrl = IRCC_CRC;
		fast = 0;
		IRDA_DEBUG(0, "%s(), handling baud of 576000\n", __FUNCTION__);
		break;
	case 1152000:
		ir_mode = IRCC_CFGA_IRDA_HDLC;
		ctrl = IRCC_1152 | IRCC_CRC;
		fast = IRCC_LCR_A_FAST | IRCC_LCR_A_GP_DATA;
		IRDA_DEBUG(0, "%s(), handling baud of 1152000\n",
			   __FUNCTION__);
		break;
	case 4000000:
		ir_mode = IRCC_CFGA_IRDA_4PPM;
		ctrl = IRCC_CRC;
		fast = IRCC_LCR_A_FAST;
		IRDA_DEBUG(0, "%s(), handling baud of 4000000\n",
			   __FUNCTION__);
		break;
	}
	#if 0
	Now in tranceiver!
	/* This causes an interrupt */
	register_bank(fir_base, 0);
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	outb((inb(fir_base + IRCC_LCR_A) &  0xbf) | fast, fir_base + IRCC_LCR_A);
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	#endif
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	register_bank(fir_base, 1);
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	outb(((inb(fir_base + IRCC_SCE_CFGA) & IRCC_SCE_CFGA_BLOCK_CTRL_BITS_MASK) | ir_mode), fir_base + IRCC_SCE_CFGA);
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	register_bank(fir_base, 4);
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	outb((inb(fir_base + IRCC_CONTROL) & 0x30) | ctrl, fir_base + IRCC_CONTROL);
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}

/*
 * Function smsc_ircc_fir_start(self)
 *
 *    Change the speed of the device
 *
 */
static void smsc_ircc_fir_start(struct smsc_ircc_cb *self)
{
	struct net_device *dev;
	int fir_base;

	IRDA_DEBUG(1, "%s\n", __FUNCTION__);

	IRDA_ASSERT(self != NULL, return;);
	dev = self->netdev;
	IRDA_ASSERT(dev != NULL, return;);

	fir_base = self->io.fir_base;

	/* Reset everything */

	/* Install FIR transmit handler */
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	dev->hard_start_xmit = smsc_ircc_hard_xmit_fir;
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	/* Clear FIFO */
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	outb(inb(fir_base + IRCC_LCR_A) | IRCC_LCR_A_FIFO_RESET, fir_base + IRCC_LCR_A);
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	/* Enable interrupt */
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	/*outb(IRCC_IER_ACTIVE_FRAME|IRCC_IER_EOM, fir_base + IRCC_IER);*/
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	register_bank(fir_base, 1);

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	/* Select the TX/RX interface */
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#ifdef SMSC_669 /* Uses pin 88/89 for Rx/Tx */
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	outb(((inb(fir_base + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_COM),
	     fir_base + IRCC_SCE_CFGB);
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	outb(((inb(fir_base + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_IR),
	     fir_base + IRCC_SCE_CFGB);
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#endif
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	(void) inb(fir_base + IRCC_FIFO_THRESHOLD);
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	/* Enable SCE interrupts */
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	outb(0, fir_base + IRCC_MASTER);
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	register_bank(fir_base, 0);
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	outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, fir_base + IRCC_IER);
	outb(IRCC_MASTER_INT_EN, fir_base + IRCC_MASTER);
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}

/*
 * Function smsc_ircc_fir_stop(self, baud)
 *
 *    Change the speed of the device
 *
 */
static void smsc_ircc_fir_stop(struct smsc_ircc_cb *self)
{
	int fir_base;

	IRDA_DEBUG(1, "%s\n", __FUNCTION__);
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	IRDA_ASSERT(self != NULL, return;);

	fir_base = self->io.fir_base;
	register_bank(fir_base, 0);
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	/*outb(IRCC_MASTER_RESET, fir_base + IRCC_MASTER);*/
	outb(inb(fir_base + IRCC_LCR_B) & IRCC_LCR_B_SIP_ENABLE, fir_base + IRCC_LCR_B);
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}


/*
 * Function smsc_ircc_change_speed(self, baud)
 *
 *    Change the speed of the device
 *
 * This function *must* be called with spinlock held, because it may
 * be called from the irq handler. - Jean II
 */
static void smsc_ircc_change_speed(void *priv, u32 speed)
{
	struct smsc_ircc_cb *self = (struct smsc_ircc_cb *) priv;
	struct net_device *dev;
	int last_speed_was_sir;
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	IRDA_DEBUG(0, "%s() changing speed to: %d\n", __FUNCTION__, speed);

	IRDA_ASSERT(self != NULL, return;);
	dev = self->netdev;

	last_speed_was_sir = self->io.speed <= SMSC_IRCC2_MAX_SIR_SPEED;

	#if 0
	/* Temp Hack */
	speed= 1152000;
	self->io.speed = speed;
	last_speed_was_sir = 0;
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	smsc_ircc_fir_start(self);
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	#endif
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	if (self->io.speed == 0)
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		smsc_ircc_sir_start(self);

	#if 0
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	if (!last_speed_was_sir) speed = self->io.speed;
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	#endif

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	if (self->io.speed != speed)
		smsc_ircc_set_transceiver_for_speed(self, speed);
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	self->io.speed = speed;
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	if (speed <= SMSC_IRCC2_MAX_SIR_SPEED) {
		if (!last_speed_was_sir) {
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			smsc_ircc_fir_stop(self);
			smsc_ircc_sir_start(self);
		}
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		smsc_ircc_set_sir_speed(self, speed);
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	} else {
		if (last_speed_was_sir) {
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			#if SMSC_IRCC2_C_SIR_STOP
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			smsc_ircc_sir_stop(self);
			#endif
			smsc_ircc_fir_start(self);
		}
		smsc_ircc_set_fir_speed(self, speed);

		#if 0
		self->tx_buff.len = 10;
		self->tx_buff.data = self->tx_buff.head;
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		smsc_ircc_dma_xmit(self, 4000);
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		#endif
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