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linux/drivers/net/irda/smsc-ircc2.c
Eric Dumazet 807540baae drivers/net: return operator cleanup 
Change "return (EXPR);" to "return EXPR;"

return is not a function, parentheses are not required.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-26 18:34:29 -07:00

3033 lines
77 KiB
C
Raw Blame History

/*********************************************************************
*
* Description: Driver for the SMC Infrared Communications Controller
* Status: Experimental.
* Author: Daniele Peri (peri@csai.unipa.it)
* Created at:
* Modified at:
* Modified by:
*
* Copyright (c) 2002 Daniele Peri
* All Rights Reserved.
* Copyright (c) 2002 Jean Tourrilhes
* Copyright (c) 2006 Linus Walleij
*
*
* Based on smc-ircc.c:
*
* Copyright (c) 2001 Stefani Seibold
* Copyright (c) 1999-2001 Dag Brattli
* Copyright (c) 1998-1999 Thomas Davis,
*
* and irport.c:
*
* Copyright (c) 1997, 1998, 1999-2000 Dag Brattli, 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.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
********************************************************************/
#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/init.h>
#include <linux/rtnetlink.h>
#include <linux/serial_reg.h>
#include <linux/dma-mapping.h>
#include <linux/pnp.h>
#include <linux/platform_device.h>
#include <linux/gfp.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/byteorder.h>
#include <linux/spinlock.h>
#include <linux/pm.h>
#ifdef CONFIG_PCI
#include <linux/pci.h>
#endif
#include <net/irda/wrapper.h>
#include <net/irda/irda.h>
#include <net/irda/irda_device.h>
#include "smsc-ircc2.h"
#include "smsc-sio.h"
MODULE_AUTHOR("Daniele Peri <peri@csai.unipa.it>");
MODULE_DESCRIPTION("SMC IrCC SIR/FIR controller driver");
MODULE_LICENSE("GPL");
static int smsc_nopnp = 1;
module_param_named(nopnp, smsc_nopnp, bool, 0);
MODULE_PARM_DESC(nopnp, "Do not use PNP to detect controller settings, defaults to true");
#define DMA_INVAL 255
static int ircc_dma = DMA_INVAL;
module_param(ircc_dma, int, 0);
MODULE_PARM_DESC(ircc_dma, "DMA channel");
#define IRQ_INVAL 255
static int ircc_irq = IRQ_INVAL;
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");
/* Types */
#ifdef CONFIG_PCI
struct smsc_ircc_subsystem_configuration {
unsigned short vendor; /* PCI vendor ID */
unsigned short device; /* PCI vendor ID */
unsigned short subvendor; /* PCI subsystem vendor ID */
unsigned short subdevice; /* PCI subsystem device ID */
unsigned short sir_io; /* I/O port for SIR */
unsigned short fir_io; /* I/O port for FIR */
unsigned char fir_irq; /* FIR IRQ */
unsigned char fir_dma; /* FIR DMA */
unsigned short cfg_base; /* I/O port for chip configuration */
int (*preconfigure)(struct pci_dev *dev, struct smsc_ircc_subsystem_configuration *conf); /* Preconfig function */
const char *name; /* name shown as info */
};
#endif
struct smsc_transceiver {
char *name;
void (*set_for_speed)(int fir_base, u32 speed);
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 irlap_cb *irlap; /* The link layer we are binded to */
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 */
__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 platform_device *pldev;
};
/* Constants */
#define SMSC_IRCC2_DRIVER_NAME "smsc-ircc2"
#define SMSC_IRCC2_C_IRDA_FALLBACK_SPEED 9600
#define SMSC_IRCC2_C_DEFAULT_TRANSCEIVER 1
#define SMSC_IRCC2_C_NET_TIMEOUT 0
#define SMSC_IRCC2_C_SIR_STOP 0
static const char *driver_name = SMSC_IRCC2_DRIVER_NAME;
/* 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);
static int smsc_ircc_dma_receive(struct smsc_ircc_cb *self);
static void smsc_ircc_dma_receive_complete(struct smsc_ircc_cb *self);
static void smsc_ircc_sir_receive(struct smsc_ircc_cb *self);
static netdev_tx_t smsc_ircc_hard_xmit_sir(struct sk_buff *skb,
struct net_device *dev);
static netdev_tx_t smsc_ircc_hard_xmit_fir(struct sk_buff *skb,
struct net_device *dev);
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);
static void smsc_ircc_change_speed(struct smsc_ircc_cb *self, u32 speed);
static void smsc_ircc_set_sir_speed(struct smsc_ircc_cb *self, u32 speed);
static irqreturn_t smsc_ircc_interrupt(int irq, void *dev_id);
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 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);
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);
static int __init smsc_superio_fdc(unsigned short cfg_base);
static int __init smsc_superio_lpc(unsigned short cfg_base);
#ifdef CONFIG_PCI
static int __init preconfigure_smsc_chip(struct smsc_ircc_subsystem_configuration *conf);
static int __init preconfigure_through_82801(struct pci_dev *dev, struct smsc_ircc_subsystem_configuration *conf);
static void __init preconfigure_ali_port(struct pci_dev *dev,
unsigned short port);
static int __init preconfigure_through_ali(struct pci_dev *dev, struct smsc_ircc_subsystem_configuration *conf);
static int __init smsc_ircc_preconfigure_subsystems(unsigned short ircc_cfg,
unsigned short ircc_fir,
unsigned short ircc_sir,
unsigned char ircc_dma,
unsigned char ircc_irq);
#endif
/* 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 int smsc_ircc_suspend(struct platform_device *dev, pm_message_t state);
static int smsc_ircc_resume(struct platform_device *dev);
static struct platform_driver smsc_ircc_driver = {
.suspend = smsc_ircc_suspend,
.resume = smsc_ircc_resume,
.driver = {
.name = SMSC_IRCC2_DRIVER_NAME,
},
};
/* Transceivers for SMSC-ircc */
static struct smsc_transceiver smsc_transceivers[] =
{
{ "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 }
};
#define SMSC_IRCC2_C_NUMBER_OF_TRANSCEIVERS (ARRAY_SIZE(smsc_transceivers) - 1)
/* 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 */
static struct smsc_chip __initdata fdc_chips_flat[] =
{
/* 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 }
};
static struct smsc_chip __initdata fdc_chips_paged[] =
{
/* 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 }
};
static struct smsc_chip __initdata lpc_chips_flat[] =
{
/* Base address 0x2E or 0x4E */
{ "47N227", KEY55_1|FIR|SERx4, 0x5a, 0x00 },
{ "47N227", KEY55_1|FIR|SERx4, 0x7a, 0x00 },
{ "47N267", KEY55_1|FIR|SERx4, 0x5e, 0x00 },
{ NULL }
};
static struct smsc_chip __initdata lpc_chips_paged[] =
{
/* 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
static struct smsc_chip_address __initdata possible_addresses[] =
{
{ 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 }
};
/* Globals */
static struct smsc_ircc_cb *dev_self[] = { NULL, NULL };
static unsigned short dev_count;
static inline void register_bank(int iobase, int bank)
{
outb(((inb(iobase + IRCC_MASTER) & 0xf0) | (bank & 0x07)),
iobase + IRCC_MASTER);
}
/* PNP hotplug support */
static const struct pnp_device_id smsc_ircc_pnp_table[] = {
{ .id = "SMCf010", .driver_data = 0 },
/* and presumably others */
{ }
};
MODULE_DEVICE_TABLE(pnp, smsc_ircc_pnp_table);
static int pnp_driver_registered;
#ifdef CONFIG_PNP
static int __init smsc_ircc_pnp_probe(struct pnp_dev *dev,
const struct pnp_device_id *dev_id)
{
unsigned int firbase, sirbase;
u8 dma, irq;
if (!(pnp_port_valid(dev, 0) && pnp_port_valid(dev, 1) &&
pnp_dma_valid(dev, 0) && pnp_irq_valid(dev, 0)))
return -EINVAL;
sirbase = pnp_port_start(dev, 0);
firbase = pnp_port_start(dev, 1);
dma = pnp_dma(dev, 0);
irq = pnp_irq(dev, 0);
if (smsc_ircc_open(firbase, sirbase, dma, irq))
return -ENODEV;
return 0;
}
static struct pnp_driver smsc_ircc_pnp_driver = {
.name = "smsc-ircc2",
.id_table = smsc_ircc_pnp_table,
.probe = smsc_ircc_pnp_probe,
};
#else /* CONFIG_PNP */
static struct pnp_driver smsc_ircc_pnp_driver;
#endif
/*******************************************************************************
*
*
* SMSC-ircc stuff
*
*
*******************************************************************************/
static int __init smsc_ircc_legacy_probe(void)
{
int ret = 0;
#ifdef CONFIG_PCI
if (smsc_ircc_preconfigure_subsystems(ircc_cfg, ircc_fir, ircc_sir, ircc_dma, ircc_irq) < 0) {
/* Ignore errors from preconfiguration */
IRDA_ERROR("%s, Preconfiguration failed !\n", driver_name);
}
#endif
if (ircc_fir > 0 && ircc_sir > 0) {
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))
ret = -ENODEV;
} else {
ret = -ENODEV;
/* try user provided configuration register base address */
if (ircc_cfg > 0) {
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;
}
if (smsc_ircc_look_for_chips() > 0)
ret = 0;
}
return ret;
}
/*
* 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)
{
int ret;
IRDA_DEBUG(1, "%s\n", __func__);
ret = platform_driver_register(&smsc_ircc_driver);
if (ret) {
IRDA_ERROR("%s, Can't register driver!\n", driver_name);
return ret;
}
dev_count = 0;
if (smsc_nopnp || !pnp_platform_devices ||
ircc_cfg || ircc_fir || ircc_sir ||
ircc_dma != DMA_INVAL || ircc_irq != IRQ_INVAL) {
ret = smsc_ircc_legacy_probe();
} else {
if (pnp_register_driver(&smsc_ircc_pnp_driver) == 0)
pnp_driver_registered = 1;
}
if (ret) {
if (pnp_driver_registered)
pnp_unregister_driver(&smsc_ircc_pnp_driver);
platform_driver_unregister(&smsc_ircc_driver);
}
return ret;
}
static netdev_tx_t smsc_ircc_net_xmit(struct sk_buff *skb,
struct net_device *dev)
{
struct smsc_ircc_cb *self = netdev_priv(dev);
if (self->io.speed > 115200)
return smsc_ircc_hard_xmit_fir(skb, dev);
else
return smsc_ircc_hard_xmit_sir(skb, dev);
}
static const struct net_device_ops smsc_ircc_netdev_ops = {
.ndo_open = smsc_ircc_net_open,
.ndo_stop = smsc_ircc_net_close,
.ndo_do_ioctl = smsc_ircc_net_ioctl,
.ndo_start_xmit = smsc_ircc_net_xmit,
#if SMSC_IRCC2_C_NET_TIMEOUT
.ndo_tx_timeout = smsc_ircc_timeout,
#endif
};
/*
* 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;
IRDA_DEBUG(1, "%s\n", __func__);
err = smsc_ircc_present(fir_base, sir_base);
if (err)
goto err_out;
err = -ENOMEM;
if (dev_count >= ARRAY_SIZE(dev_self)) {
IRDA_WARNING("%s(), too many devices!\n", __func__);
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", __func__);
goto err_out1;
}
#if SMSC_IRCC2_C_NET_TIMEOUT
dev->watchdog_timeo = HZ * 2; /* Allow enough time for speed change */
#endif
dev->netdev_ops = &smsc_ircc_netdev_ops;
self = netdev_priv(dev);
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);
self->rx_buff.truesize = SMSC_IRCC2_RX_BUFF_TRUESIZE;
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;
smsc_ircc_setup_io(self, fir_base, sir_base, dma, irq);
smsc_ircc_setup_qos(self);
smsc_ircc_init_chip(self);
if (ircc_transceiver > 0 &&
ircc_transceiver < SMSC_IRCC2_C_NUMBER_OF_TRANSCEIVERS)
self->transceiver = ircc_transceiver;
else
smsc_ircc_probe_transceiver(self);
err = register_netdev(self->netdev);
if (err) {
IRDA_ERROR("%s, Network device registration failed!\n",
driver_name);
goto err_out4;
}
self->pldev = platform_device_register_simple(SMSC_IRCC2_DRIVER_NAME,
dev_count, NULL, 0);
if (IS_ERR(self->pldev)) {
err = PTR_ERR(self->pldev);
goto err_out5;
}
platform_set_drvdata(self->pldev, self);
IRDA_MESSAGE("IrDA: Registered device %s\n", dev->name);
dev_count++;
return 0;
err_out5:
unregister_netdev(self->netdev);
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",
__func__, 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",
__func__, sir_base);
goto out2;
}
register_bank(fir_base, 3);
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);
dma = config & IRCC_INTERFACE_DMA_MASK;
irq = (config & IRCC_INTERFACE_IRQ_MASK) >> 4;
if (high != 0x10 || low != 0xb8 || (chip != 0xf1 && chip != 0xf2)) {
IRDA_WARNING("%s(), addr 0x%04x - no device found!\n",
__func__, 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;
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
*
*/
static void smsc_ircc_setup_io(struct smsc_ircc_cb *self,
unsigned int fir_base, unsigned int sir_base,
u8 dma, u8 irq)
{
unsigned char config, chip_dma, chip_irq;
register_bank(fir_base, 3);
config = inb(fir_base + IRCC_INTERFACE);
chip_dma = config & IRCC_INTERFACE_DMA_MASK;
chip_irq = (config & IRCC_INTERFACE_IRQ_MASK) >> 4;
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 != IRQ_INVAL) {
if (irq != chip_irq)
IRDA_MESSAGE("%s, Overriding IRQ - chip says %d, using %d\n",
driver_name, chip_irq, irq);
self->io.irq = irq;
} else
self->io.irq = chip_irq;
if (dma != DMA_INVAL) {
if (dma != chip_dma)
IRDA_MESSAGE("%s, Overriding DMA - chip says %d, using %d\n",
driver_name, chip_dma, dma);
self->io.dma = dma;
} else
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);
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)
{
int iobase = self->io.fir_base;
register_bank(iobase, 0);
outb(IRCC_MASTER_RESET, iobase + IRCC_MASTER);
outb(0x00, iobase + IRCC_MASTER);
register_bank(iobase, 1);
outb(((inb(iobase + IRCC_SCE_CFGA) & 0x87) | IRCC_CFGA_IRDA_SIR_A),
iobase + IRCC_SCE_CFGA);
#ifdef smsc_669 /* Uses pin 88/89 for Rx/Tx */
outb(((inb(iobase + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_COM),
iobase + IRCC_SCE_CFGB);
#else
outb(((inb(iobase + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_IR),
iobase + IRCC_SCE_CFGB);
#endif
(void) inb(iobase + IRCC_FIFO_THRESHOLD);
outb(SMSC_IRCC2_FIFO_THRESHOLD, iobase + IRCC_FIFO_THRESHOLD);
register_bank(iobase, 4);
outb((inb(iobase + IRCC_CONTROL) & 0x30), iobase + IRCC_CONTROL);
register_bank(iobase, 0);
outb(0, iobase + IRCC_LCR_A);
smsc_ircc_set_sir_speed(self, SMSC_IRCC2_C_IRDA_FALLBACK_SPEED);
/* Power on device */
outb(0x00, iobase + IRCC_MASTER);
}
/*
* 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 = 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;
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;
}
return ret;
}
#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 = netdev_priv(dev);
unsigned long flags;
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; /* prevent tx timeout */
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.
*/
static netdev_tx_t 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", __func__);
IRDA_ASSERT(dev != NULL, return NETDEV_TX_OK;);
self = netdev_priv(dev);
IRDA_ASSERT(self != NULL, return NETDEV_TX_OK;);
netif_stop_queue(dev);
/* 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);
if (speed != self->io.speed && speed != -1) {
/* 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 NETDEV_TX_OK;
}
self->new_speed = speed;
}
/* Init tx buffer */
self->tx_buff.data = self->tx_buff.head;
/* Copy skb to tx_buff while wrapping, stuffing and making CRC */
self->tx_buff.len = async_wrap_skb(skb, self->tx_buff.data,
self->tx_buff.truesize);
dev->stats.tx_bytes += self->tx_buff.len;
/* Turn on transmit finished interrupt. Will fire immediately! */
outb(UART_IER_THRI, self->io.sir_base + UART_IER);
spin_unlock_irqrestore(&self->lock, flags);
dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
/*
* 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;
switch (speed) {
default:
case 576000:
ir_mode = IRCC_CFGA_IRDA_HDLC;
ctrl = IRCC_CRC;
fast = 0;
IRDA_DEBUG(0, "%s(), handling baud of 576000\n", __func__);
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",
__func__);
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",
__func__);
break;
}
#if 0
Now in tranceiver!
/* This causes an interrupt */
register_bank(fir_base, 0);
outb((inb(fir_base + IRCC_LCR_A) & 0xbf) | fast, fir_base + IRCC_LCR_A);
#endif
register_bank(fir_base, 1);
outb(((inb(fir_base + IRCC_SCE_CFGA) & IRCC_SCE_CFGA_BLOCK_CTRL_BITS_MASK) | ir_mode), fir_base + IRCC_SCE_CFGA);
register_bank(fir_base, 4);
outb((inb(fir_base + IRCC_CONTROL) & 0x30) | ctrl, fir_base + IRCC_CONTROL);
}
/*
* 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", __func__);
IRDA_ASSERT(self != NULL, return;);
dev = self->netdev;
IRDA_ASSERT(dev != NULL, return;);
fir_base = self->io.fir_base;
/* Reset everything */
/* Clear FIFO */
outb(inb(fir_base + IRCC_LCR_A) | IRCC_LCR_A_FIFO_RESET, fir_base + IRCC_LCR_A);
/* Enable interrupt */
/*outb(IRCC_IER_ACTIVE_FRAME|IRCC_IER_EOM, fir_base + IRCC_IER);*/
register_bank(fir_base, 1);
/* Select the TX/RX interface */
#ifdef SMSC_669 /* Uses pin 88/89 for Rx/Tx */
outb(((inb(fir_base + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_COM),
fir_base + IRCC_SCE_CFGB);
#else
outb(((inb(fir_base + IRCC_SCE_CFGB) & 0x3f) | IRCC_CFGB_MUX_IR),
fir_base + IRCC_SCE_CFGB);
#endif
(void) inb(fir_base + IRCC_FIFO_THRESHOLD);
/* Enable SCE interrupts */
outb(0, fir_base + IRCC_MASTER);
register_bank(fir_base, 0);
outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, fir_base + IRCC_IER);
outb(IRCC_MASTER_INT_EN, fir_base + IRCC_MASTER);
}
/*
* 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", __func__);
IRDA_ASSERT(self != NULL, return;);
fir_base = self->io.fir_base;
register_bank(fir_base, 0);
/*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);
}
/*
* 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(struct smsc_ircc_cb *self, u32 speed)
{
struct net_device *dev;
int last_speed_was_sir;
IRDA_DEBUG(0, "%s() changing speed to: %d\n", __func__, 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;
smsc_ircc_fir_start(self);
#endif
if (self->io.speed == 0)
smsc_ircc_sir_start(self);
#if 0
if (!last_speed_was_sir) speed = self->io.speed;
#endif
if (self->io.speed != speed)
smsc_ircc_set_transceiver_for_speed(self, speed);
self->io.speed = speed;
if (speed <= SMSC_IRCC2_MAX_SIR_SPEED) {
if (!last_speed_was_sir) {
smsc_ircc_fir_stop(self);
smsc_ircc_sir_start(self);
}
smsc_ircc_set_sir_speed(self, speed);
} else {
if (last_speed_was_sir) {
#if SMSC_IRCC2_C_SIR_STOP
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;
smsc_ircc_dma_xmit(self, 4000);
#endif
/* Be ready for incoming frames */
smsc_ircc_dma_receive(self);
}
netif_wake_queue(dev);
}
/*
* Function smsc_ircc_set_sir_speed (self, speed)
*
* Set speed of IrDA port to specified baudrate
*
*/
static void smsc_ircc_set_sir_speed(struct smsc_ircc_cb *self, __u32 speed)
{
int iobase;
int fcr; /* FIFO control reg */
int lcr; /* Line control reg */
int divisor;
IRDA_DEBUG(0, "%s(), Setting speed to: %d\n", __func__, speed);
IRDA_ASSERT(self != NULL, return;);
iobase = self->io.sir_base;
/* Update accounting for new speed */
self->io.speed = speed;
/* Turn off interrupts */
outb(0, iobase + UART_IER);
divisor = SMSC_IRCC2_MAX_SIR_SPEED / speed;
fcr = UART_FCR_ENABLE_FIFO;
/*
* Use trigger level 1 to avoid 3 ms. timeout delay at 9600 bps, and
* almost 1,7 ms at 19200 bps. At speeds above that we can just forget
* about this timeout since it will always be fast enough.
*/
fcr |= self->io.speed < 38400 ?
UART_FCR_TRIGGER_1 : UART_FCR_TRIGGER_14;
/* IrDA ports use 8N1 */
lcr = UART_LCR_WLEN8;
outb(UART_LCR_DLAB | lcr, iobase + UART_LCR); /* Set DLAB */
outb(divisor & 0xff, iobase + UART_DLL); /* Set speed */
outb(divisor >> 8, iobase + UART_DLM);
outb(lcr, iobase + UART_LCR); /* Set 8N1 */
outb(fcr, iobase + UART_FCR); /* Enable FIFO's */
/* Turn on interrups */
outb(UART_IER_RLSI | UART_IER_RDI | UART_IER_THRI, iobase + UART_IER);
IRDA_DEBUG(2, "%s() speed changed to: %d\n", __func__, speed);
}
/*
* Function smsc_ircc_hard_xmit_fir (skb, dev)
*
* Transmit the frame!
*
*/
static netdev_tx_t smsc_ircc_hard_xmit_fir(struct sk_buff *skb,
struct net_device *dev)
{
struct smsc_ircc_cb *self;
unsigned long flags;
s32 speed;
int mtt;
IRDA_ASSERT(dev != NULL, return NETDEV_TX_OK;);
self = netdev_priv(dev);
IRDA_ASSERT(self != NULL, return NETDEV_TX_OK;);
netif_stop_queue(dev);
/* 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 after this frame */
speed = irda_get_next_speed(skb);
if (speed != self->io.speed && speed != -1) {
/* Check for empty frame */
if (!skb->len) {
/* Note : you should make sure that speed changes
* are not going to corrupt any outgoing frame.
* Look at nsc-ircc for the gory details - Jean II */
smsc_ircc_change_speed(self, speed);
spin_unlock_irqrestore(&self->lock, flags);
dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
self->new_speed = speed;
}
skb_copy_from_linear_data(skb, self->tx_buff.head, skb->len);
self->tx_buff.len = skb->len;
self->tx_buff.data = self->tx_buff.head;
mtt = irda_get_mtt(skb);
if (mtt) {
int bofs;
/*
* Compute how many BOFs (STA or PA's) we need to waste the
* min turn time given the speed of the link.
*/
bofs = mtt * (self->io.speed / 1000) / 8000;
if (bofs > 4095)
bofs = 4095;
smsc_ircc_dma_xmit(self, bofs);
} else {
/* Transmit frame */
smsc_ircc_dma_xmit(self, 0);
}
spin_unlock_irqrestore(&self->lock, flags);
dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
/*
* Function smsc_ircc_dma_xmit (self, bofs)
*
* Transmit data using DMA
*
*/
static void smsc_ircc_dma_xmit(struct smsc_ircc_cb *self, int bofs)
{
int iobase = self->io.fir_base;
u8 ctrl;
IRDA_DEBUG(3, "%s\n", __func__);
#if 1
/* Disable Rx */
register_bank(iobase, 0);
outb(0x00, iobase + IRCC_LCR_B);
#endif
register_bank(iobase, 1);
outb(inb(iobase + IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
iobase + IRCC_SCE_CFGB);
self->io.direction = IO_XMIT;
/* Set BOF additional count for generating the min turn time */
register_bank(iobase, 4);
outb(bofs & 0xff, iobase + IRCC_BOF_COUNT_LO);
ctrl = inb(iobase + IRCC_CONTROL) & 0xf0;
outb(ctrl | ((bofs >> 8) & 0x0f), iobase + IRCC_BOF_COUNT_HI);
/* Set max Tx frame size */
outb(self->tx_buff.len >> 8, iobase + IRCC_TX_SIZE_HI);
outb(self->tx_buff.len & 0xff, iobase + IRCC_TX_SIZE_LO);
/*outb(UART_MCR_OUT2, self->io.sir_base + UART_MCR);*/
/* Enable burst mode chip Tx DMA */
register_bank(iobase, 1);
outb(inb(iobase + IRCC_SCE_CFGB) | IRCC_CFGB_DMA_ENABLE |
IRCC_CFGB_DMA_BURST, iobase + IRCC_SCE_CFGB);
/* Setup DMA controller (must be done after enabling chip DMA) */
irda_setup_dma(self->io.dma, self->tx_buff_dma, self->tx_buff.len,
DMA_TX_MODE);
/* Enable interrupt */
register_bank(iobase, 0);
outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, iobase + IRCC_IER);
outb(IRCC_MASTER_INT_EN, iobase + IRCC_MASTER);
/* Enable transmit */
outb(IRCC_LCR_B_SCE_TRANSMIT | IRCC_LCR_B_SIP_ENABLE, iobase + IRCC_LCR_B);
}
/*
* Function smsc_ircc_dma_xmit_complete (self)
*
* The transfer of a frame in finished. This function will only be called
* by the interrupt handler
*
*/
static void smsc_ircc_dma_xmit_complete(struct smsc_ircc_cb *self)
{
int iobase = self->io.fir_base;
IRDA_DEBUG(3, "%s\n", __func__);
#if 0
/* Disable Tx */
register_bank(iobase, 0);
outb(0x00, iobase + IRCC_LCR_B);
#endif
register_bank(iobase, 1);
outb(inb(iobase + IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
iobase + IRCC_SCE_CFGB);
/* Check for underrun! */
register_bank(iobase, 0);
if (inb(iobase + IRCC_LSR) & IRCC_LSR_UNDERRUN) {
self->netdev->stats.tx_errors++;
self->netdev->stats.tx_fifo_errors++;
/* Reset error condition */
register_bank(iobase, 0);
outb(IRCC_MASTER_ERROR_RESET, iobase + IRCC_MASTER);
outb(0x00, iobase + IRCC_MASTER);
} else {
self->netdev->stats.tx_packets++;
self->netdev->stats.tx_bytes += self->tx_buff.len;
}
/* Check if it's time to change the speed */
if (self->new_speed) {
smsc_ircc_change_speed(self, self->new_speed);
self->new_speed = 0;
}
netif_wake_queue(self->netdev);
}
/*
* Function smsc_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 smsc_ircc_dma_receive(struct smsc_ircc_cb *self)
{
int iobase = self->io.fir_base;
#if 0
/* Turn off chip DMA */
register_bank(iobase, 1);
outb(inb(iobase + IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
iobase + IRCC_SCE_CFGB);
#endif
/* Disable Tx */
register_bank(iobase, 0);
outb(0x00, iobase + IRCC_LCR_B);
/* Turn off chip DMA */
register_bank(iobase, 1);
outb(inb(iobase + IRCC_SCE_CFGB) & ~IRCC_CFGB_DMA_ENABLE,
iobase + IRCC_SCE_CFGB);
self->io.direction = IO_RECV;
self->rx_buff.data = self->rx_buff.head;
/* Set max Rx frame size */
register_bank(iobase, 4);
outb((2050 >> 8) & 0x0f, iobase + IRCC_RX_SIZE_HI);
outb(2050 & 0xff, iobase + IRCC_RX_SIZE_LO);
/* Setup DMA controller */
irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize,
DMA_RX_MODE);
/* Enable burst mode chip Rx DMA */
register_bank(iobase, 1);
outb(inb(iobase + IRCC_SCE_CFGB) | IRCC_CFGB_DMA_ENABLE |
IRCC_CFGB_DMA_BURST, iobase + IRCC_SCE_CFGB);
/* Enable interrupt */
register_bank(iobase, 0);
outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, iobase + IRCC_IER);
outb(IRCC_MASTER_INT_EN, iobase + IRCC_MASTER);
/* Enable receiver */
register_bank(iobase, 0);
outb(IRCC_LCR_B_SCE_RECEIVE | IRCC_LCR_B_SIP_ENABLE,
iobase + IRCC_LCR_B);
return 0;
}
/*
* Function smsc_ircc_dma_receive_complete(self)
*
* Finished with receiving frames
*
*/
static void smsc_ircc_dma_receive_complete(struct smsc_ircc_cb *self)
{
struct sk_buff *skb;
int len, msgcnt, lsr;
int iobase = self->io.fir_base;
register_bank(iobase, 0);
IRDA_DEBUG(3, "%s\n", __func__);
#if 0
/* Disable Rx */
register_bank(iobase, 0);
outb(0x00, iobase + IRCC_LCR_B);
#endif
register_bank(iobase, 0);
outb(inb(iobase + IRCC_LSAR) & ~IRCC_LSAR_ADDRESS_MASK, iobase + IRCC_LSAR);
lsr= inb(iobase + IRCC_LSR);
msgcnt = inb(iobase + IRCC_LCR_B) & 0x08;
IRDA_DEBUG(2, "%s: dma count = %d\n", __func__,
get_dma_residue(self->io.dma));
len = self->rx_buff.truesize - get_dma_residue(self->io.dma);
/* Look for errors */
if (lsr & (IRCC_LSR_FRAME_ERROR | IRCC_LSR_CRC_ERROR | IRCC_LSR_SIZE_ERROR)) {
self->netdev->stats.rx_errors++;
if (lsr & IRCC_LSR_FRAME_ERROR)
self->netdev->stats.rx_frame_errors++;
if (lsr & IRCC_LSR_CRC_ERROR)
self->netdev->stats.rx_crc_errors++;
if (lsr & IRCC_LSR_SIZE_ERROR)
self->netdev->stats.rx_length_errors++;
if (lsr & (IRCC_LSR_UNDERRUN | IRCC_LSR_OVERRUN))
self->netdev->stats.rx_length_errors++;
return;
}
/* Remove CRC */
len -= self->io.speed < 4000000 ? 2 : 4;
if (len < 2 || len > 2050) {
IRDA_WARNING("%s(), bogus len=%d\n", __func__, len);
return;
}
IRDA_DEBUG(2, "%s: msgcnt = %d, len=%d\n", __func__, msgcnt, len);
skb = dev_alloc_skb(len + 1);
if (!skb) {
IRDA_WARNING("%s(), memory squeeze, dropping frame.\n",
__func__);
return;
}
/* Make sure IP header gets aligned */
skb_reserve(skb, 1);
memcpy(skb_put(skb, len), self->rx_buff.data, len);
self->netdev->stats.rx_packets++;
self->netdev->stats.rx_bytes += len;
skb->dev = self->netdev;
skb_reset_mac_header(skb);
skb->protocol = htons(ETH_P_IRDA);
netif_rx(skb);
}
/*
* Function smsc_ircc_sir_receive (self)
*
* Receive one frame from the infrared port
*
*/
static void smsc_ircc_sir_receive(struct smsc_ircc_cb *self)
{
int boguscount = 0;
int iobase;
IRDA_ASSERT(self != NULL, return;);
iobase = self->io.sir_base;
/*
* Receive all characters in Rx FIFO, unwrap and unstuff them.
* async_unwrap_char will deliver all found frames
*/
do {
async_unwrap_char(self->netdev, &self->netdev->stats, &self->rx_buff,
inb(iobase + UART_RX));
/* Make sure we don't stay here to long */
if (boguscount++ > 32) {
IRDA_DEBUG(2, "%s(), breaking!\n", __func__);
break;
}
} while (inb(iobase + UART_LSR) & UART_LSR_DR);
}
/*
* Function smsc_ircc_interrupt (irq, dev_id, regs)
*
* An interrupt from the chip has arrived. Time to do some work
*
*/
static irqreturn_t smsc_ircc_interrupt(int dummy, void *dev_id)
{
struct net_device *dev = dev_id;
struct smsc_ircc_cb *self = netdev_priv(dev);
int iobase, iir, lcra, lsr;
irqreturn_t ret = IRQ_NONE;
/* Serialise the interrupt handler in various CPUs, stop Tx path */
spin_lock(&self->lock);
/* Check if we should use the SIR interrupt handler */
if (self->io.speed <= SMSC_IRCC2_MAX_SIR_SPEED) {
ret = smsc_ircc_interrupt_sir(dev);
goto irq_ret_unlock;
}
iobase = self->io.fir_base;
register_bank(iobase, 0);
iir = inb(iobase + IRCC_IIR);
if (iir == 0)
goto irq_ret_unlock;
ret = IRQ_HANDLED;
/* Disable interrupts */
outb(0, iobase + IRCC_IER);
lcra = inb(iobase + IRCC_LCR_A);
lsr = inb(iobase + IRCC_LSR);
IRDA_DEBUG(2, "%s(), iir = 0x%02x\n", __func__, iir);
if (iir & IRCC_IIR_EOM) {
if (self->io.direction == IO_RECV)
smsc_ircc_dma_receive_complete(self);
else
smsc_ircc_dma_xmit_complete(self);
smsc_ircc_dma_receive(self);
}
if (iir & IRCC_IIR_ACTIVE_FRAME) {
/*printk(KERN_WARNING "%s(): Active Frame\n", __func__);*/
}
/* Enable interrupts again */
register_bank(iobase, 0);
outb(IRCC_IER_ACTIVE_FRAME | IRCC_IER_EOM, iobase + IRCC_IER);
irq_ret_unlock:
spin_unlock(&self->lock);
return ret;
}
/*
* Function irport_interrupt_sir (irq, dev_id)
*
* Interrupt handler for SIR modes
*/
static irqreturn_t smsc_ircc_interrupt_sir(struct net_device *dev)
{
struct smsc_ircc_cb *self = netdev_priv(dev);
int boguscount = 0;
int iobase;
int iir, lsr;
/* Already locked comming here in smsc_ircc_interrupt() */
/*spin_lock(&self->lock);*/
iobase = self->io.sir_base;
iir = inb(iobase + UART_IIR) & UART_IIR_ID;
if (iir == 0)
return IRQ_NONE;
while (iir) {
/* Clear interrupt */
lsr = inb(iobase + UART_LSR);
IRDA_DEBUG(4, "%s(), iir=%02x, lsr=%02x, iobase=%#x\n",
__func__, iir, lsr, iobase);
switch (iir) {
case UART_IIR_RLSI:
IRDA_DEBUG(2, "%s(), RLSI\n", __func__);
break;
case UART_IIR_RDI:
/* Receive interrupt */
smsc_ircc_sir_receive(self);
break;
case UART_IIR_THRI:
if (lsr & UART_LSR_THRE)
/* Transmitter ready for data */
smsc_ircc_sir_write_wakeup(self);
break;
default:
IRDA_DEBUG(0, "%s(), unhandled IIR=%#x\n",
__func__, iir);
break;
}
/* Make sure we don't stay here to long */
if (boguscount++ > 100)
break;
iir = inb(iobase + UART_IIR) & UART_IIR_ID;
}
/*spin_unlock(&self->lock);*/
return IRQ_HANDLED;
}
#if 0 /* unused */
/*
* Function ircc_is_receiving (self)
*
* Return TRUE is we are currently receiving a frame
*
*/
static int ircc_is_receiving(struct smsc_ircc_cb *self)
{
int status = FALSE;
/* int iobase; */
IRDA_DEBUG(1, "%s\n", __func__);
IRDA_ASSERT(self != NULL, return FALSE;);
IRDA_DEBUG(0, "%s: dma count = %d\n", __func__,
get_dma_residue(self->io.dma));
status = (self->rx_buff.state != OUTSIDE_FRAME);
return status;
}
#endif /* unused */
static int smsc_ircc_request_irq(struct smsc_ircc_cb *self)
{
int error;
error = request_irq(self->io.irq, smsc_ircc_interrupt, 0,
self->netdev->name, self->netdev);
if (error)
IRDA_DEBUG(0, "%s(), unable to allocate irq=%d, err=%d\n",
__func__, self->io.irq, error);
return error;
}
static void smsc_ircc_start_interrupts(struct smsc_ircc_cb *self)
{
unsigned long flags;
spin_lock_irqsave(&self->lock, flags);
self->io.speed = 0;
smsc_ircc_change_speed(self, SMSC_IRCC2_C_IRDA_FALLBACK_SPEED);
spin_unlock_irqrestore(&self->lock, flags);
}
static void smsc_ircc_stop_interrupts(struct smsc_ircc_cb *self)
{
int iobase = self->io.fir_base;
unsigned long flags;
spin_lock_irqsave(&self->lock, flags);
register_bank(iobase, 0);
outb(0, iobase + IRCC_IER);
outb(IRCC_MASTER_RESET, iobase + IRCC_MASTER);
outb(0x00, iobase + IRCC_MASTER);
spin_unlock_irqrestore(&self->lock, flags);
}
/*
* Function smsc_ircc_net_open (dev)
*
* Start the device
*
*/
static int smsc_ircc_net_open(struct net_device *dev)
{
struct smsc_ircc_cb *self;
char hwname[16];
IRDA_DEBUG(1, "%s\n", __func__);
IRDA_ASSERT(dev != NULL, return -1;);
self = netdev_priv(dev);
IRDA_ASSERT(self != NULL, return 0;);
if (self->io.suspended) {
IRDA_DEBUG(0, "%s(), device is suspended\n", __func__);
return -EAGAIN;
}
if (request_irq(self->io.irq, smsc_ircc_interrupt, 0, dev->name,
(void *) dev)) {
IRDA_DEBUG(0, "%s(), unable to allocate irq=%d\n",
__func__, self->io.irq);
return -EAGAIN;
}
smsc_ircc_start_interrupts(self);
/* Give self a hardware name */
/* It would be cool to offer the chip revision here - Jean II */
sprintf(hwname, "SMSC @ 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);
/*
* Always allocate the DMA channel after the IRQ,
* and clean up on failure.
*/
if (request_dma(self->io.dma, dev->name)) {
smsc_ircc_net_close(dev);
IRDA_WARNING("%s(), unable to allocate DMA=%d\n",
__func__, self->io.dma);
return -EAGAIN;
}
netif_start_queue(dev);
return 0;
}
/*
* Function smsc_ircc_net_close (dev)
*
* Stop the device
*
*/
static int smsc_ircc_net_close(struct net_device *dev)
{
struct smsc_ircc_cb *self;
IRDA_DEBUG(1, "%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;
smsc_ircc_stop_interrupts(self);
/* if we are called from smsc_ircc_resume we don't have IRQ reserved */
if (!self->io.suspended)
free_irq(self->io.irq, dev);
disable_dma(self->io.dma);
free_dma(self->io.dma);
return 0;
}
static int smsc_ircc_suspend(struct platform_device *dev, pm_message_t state)
{
struct smsc_ircc_cb *self = platform_get_drvdata(dev);
if (!self->io.suspended) {
IRDA_DEBUG(1, "%s, Suspending\n", driver_name);
rtnl_lock();
if (netif_running(self->netdev)) {
netif_device_detach(self->netdev);
smsc_ircc_stop_interrupts(self);
free_irq(self->io.irq, self->netdev);
disable_dma(self->io.dma);
}
self->io.suspended = 1;
rtnl_unlock();
}
return 0;
}
static int smsc_ircc_resume(struct platform_device *dev)
{
struct smsc_ircc_cb *self = platform_get_drvdata(dev);
if (self->io.suspended) {
IRDA_DEBUG(1, "%s, Waking up\n", driver_name);
rtnl_lock();
smsc_ircc_init_chip(self);
if (netif_running(self->netdev)) {
if (smsc_ircc_request_irq(self)) {
/*
* Don't fail resume process, just kill this
* network interface
*/
unregister_netdevice(self->netdev);
} else {
enable_dma(self->io.dma);
smsc_ircc_start_interrupts(self);
netif_device_attach(self->netdev);
}
}
self->io.suspended = 0;
rtnl_unlock();
}
return 0;
}
/*
* Function smsc_ircc_close (self)
*
* Close driver instance
*
*/
static int __exit smsc_ircc_close(struct smsc_ircc_cb *self)
{
IRDA_DEBUG(1, "%s\n", __func__);
IRDA_ASSERT(self != NULL, return -1;);
platform_device_unregister(self->pldev);
/* Remove netdevice */
unregister_netdev(self->netdev);
smsc_ircc_stop_interrupts(self);
/* Release the PORTS that this driver is using */
IRDA_DEBUG(0, "%s(), releasing 0x%03x\n", __func__,
self->io.fir_base);
release_region(self->io.fir_base, self->io.fir_ext);
IRDA_DEBUG(0, "%s(), releasing 0x%03x\n", __func__,
self->io.sir_base);
release_region(self->io.sir_base, self->io.sir_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);
free_netdev(self->netdev);
return 0;
}
static void __exit smsc_ircc_cleanup(void)
{
int i;
IRDA_DEBUG(1, "%s\n", __func__);
for (i = 0; i < 2; i++) {
if (dev_self[i])
smsc_ircc_close(dev_self[i]);
}
if (pnp_driver_registered)
pnp_unregister_driver(&smsc_ircc_pnp_driver);
platform_driver_unregister(&smsc_ircc_driver);
}
/*
* Start SIR operations
*
* This function *must* be called with spinlock held, because it may
* be called from the irq handler (via smsc_ircc_change_speed()). - Jean II
*/
static void smsc_ircc_sir_start(struct smsc_ircc_cb *self)
{
struct net_device *dev;
int fir_base, sir_base;
IRDA_DEBUG(3, "%s\n", __func__);
IRDA_ASSERT(self != NULL, return;);
dev = self->netdev;
IRDA_ASSERT(dev != NULL, return;);
fir_base = self->io.fir_base;
sir_base = self->io.sir_base;
/* Reset everything */
outb(IRCC_MASTER_RESET, fir_base + IRCC_MASTER);
#if SMSC_IRCC2_C_SIR_STOP
/*smsc_ircc_sir_stop(self);*/
#endif
register_bank(fir_base, 1);
outb(((inb(fir_base + IRCC_SCE_CFGA) & IRCC_SCE_CFGA_BLOCK_CTRL_BITS_MASK) | IRCC_CFGA_IRDA_SIR_A), fir_base + IRCC_SCE_CFGA);
/* Initialize UART */
outb(UART_LCR_WLEN8, sir_base + UART_LCR); /* Reset DLAB */
outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), sir_base + UART_MCR);
/* Turn on interrups */
outb(UART_IER_RLSI | UART_IER_RDI |UART_IER_THRI, sir_base + UART_IER);
IRDA_DEBUG(3, "%s() - exit\n", __func__);
outb(0x00, fir_base + IRCC_MASTER);
}
#if SMSC_IRCC2_C_SIR_STOP
void smsc_ircc_sir_stop(struct smsc_ircc_cb *self)
{
int iobase;
IRDA_DEBUG(3, "%s\n", __func__);
iobase = self->io.sir_base;
/* Reset UART */
outb(0, iobase + UART_MCR);
/* Turn off interrupts */
outb(0, iobase + UART_IER);
}
#endif
/*
* Function smsc_sir_write_wakeup (self)
*
* Called by the SIR interrupt handler when there's room for more data.
* If we have more packets to send, we send them here.
*
*/
static void smsc_ircc_sir_write_wakeup(struct smsc_ircc_cb *self)
{
int actual = 0;
int iobase;
int fcr;
IRDA_ASSERT(self != NULL, return;);
IRDA_DEBUG(4, "%s\n", __func__);
iobase = self->io.sir_base;
/* Finished with frame? */
if (self->tx_buff.len > 0) {
/* Write data left in transmit buffer */
actual = smsc_ircc_sir_write(iobase, self->io.fifo_size,
self->tx_buff.data, self->tx_buff.len);
self->tx_buff.data += actual;
self->tx_buff.len -= actual;
} else {
/*if (self->tx_buff.len ==0) {*/
/*
* Now serial buffer is almost free & we can start
* transmission of another packet. But first we must check
* if we need to change the speed of the hardware
*/
if (self->new_speed) {
IRDA_DEBUG(5, "%s(), Changing speed to %d.\n",
__func__, self->new_speed);
smsc_ircc_sir_wait_hw_transmitter_finish(self);
smsc_ircc_change_speed(self, self->new_speed);
self->new_speed = 0;
} else {
/* Tell network layer that we want more frames */
netif_wake_queue(self->netdev);
}
self->netdev->stats.tx_packets++;
if (self->io.speed <= 115200) {
/*
* Reset Rx FIFO to make sure that all reflected transmit data
* is discarded. This is needed for half duplex operation
*/
fcr = UART_FCR_ENABLE_FIFO | UART_FCR_CLEAR_RCVR;
fcr |= self->io.speed < 38400 ?
UART_FCR_TRIGGER_1 : UART_FCR_TRIGGER_14;
outb(fcr, iobase + UART_FCR);
/* Turn on receive interrupts */
outb(UART_IER_RDI, iobase + UART_IER);
}
}
}
/*
* Function smsc_ircc_sir_write (iobase, fifo_size, buf, len)
*
* Fill Tx FIFO with transmit data
*
*/
static int smsc_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len)
{
int actual = 0;
/* Tx FIFO should be empty! */
if (!(inb(iobase + UART_LSR) & UART_LSR_THRE)) {
IRDA_WARNING("%s(), failed, fifo not empty!\n", __func__);
return 0;
}
/* Fill FIFO with current frame */
while (fifo_size-- > 0 && actual < len) {
/* Transmit next byte */
outb(buf[actual], iobase + UART_TX);
actual++;
}
return actual;
}
/*
* Function smsc_ircc_is_receiving (self)
*
* Returns true is we are currently receiving data
*
*/
static int smsc_ircc_is_receiving(struct smsc_ircc_cb *self)
{
return self->rx_buff.state != OUTSIDE_FRAME;
}
/*
* Function smsc_ircc_probe_transceiver(self)
*
* Tries to find the used Transceiver
*
*/
static void smsc_ircc_probe_transceiver(struct smsc_ircc_cb *self)
{
unsigned int i;
IRDA_ASSERT(self != NULL, return;);
for (i = 0; smsc_transceivers[i].name != NULL; i++)
if (smsc_transceivers[i].probe(self->io.fir_base)) {
IRDA_MESSAGE(" %s transceiver found\n",
smsc_transceivers[i].name);
self->transceiver= i + 1;
return;
}
IRDA_MESSAGE("No transceiver found. Defaulting to %s\n",
smsc_transceivers[SMSC_IRCC2_C_DEFAULT_TRANSCEIVER].name);
self->transceiver = SMSC_IRCC2_C_DEFAULT_TRANSCEIVER;
}
/*
* Function smsc_ircc_set_transceiver_for_speed(self, speed)
*
* Set the transceiver according to the speed
*
*/
static void smsc_ircc_set_transceiver_for_speed(struct smsc_ircc_cb *self, u32 speed)
{
unsigned int trx;
trx = self->transceiver;
if (trx > 0)
smsc_transceivers[trx - 1].set_for_speed(self->io.fir_base, speed);
}
/*
* Function smsc_ircc_wait_hw_transmitter_finish ()
*
* Wait for the real end of HW transmission
*
* The UART is a strict FIFO, and we get called only when we have finished
* pushing data to the FIFO, so the maximum amount of time we must wait
* is only for the FIFO to drain out.
*
* We use a simple calibrated loop. We may need to adjust the loop
* delay (udelay) to balance I/O traffic and latency. And we also need to
* adjust the maximum timeout.
* It would probably be better to wait for the proper interrupt,
* but it doesn't seem to be available.
*
* We can't use jiffies or kernel timers because :
* 1) We are called from the interrupt handler, which disable softirqs,
* so jiffies won't be increased
* 2) Jiffies granularity is usually very coarse (10ms), and we don't
* want to wait that long to detect stuck hardware.
* Jean II
*/
static void smsc_ircc_sir_wait_hw_transmitter_finish(struct smsc_ircc_cb *self)
{
int iobase = self->io.sir_base;
int count = SMSC_IRCC2_HW_TRANSMITTER_TIMEOUT_US;
/* Calibrated busy loop */
while (count-- > 0 && !(inb(iobase + UART_LSR) & UART_LSR_TEMT))
udelay(1);
if (count < 0)
IRDA_DEBUG(0, "%s(): stuck transmitter\n", __func__);
}
/* PROBING
*
* REVISIT we can be told about the device by PNP, and should use that info
* instead of probing hardware and creating a platform_device ...
*/
static int __init smsc_ircc_look_for_chips(void)
{
struct smsc_chip_address *address;
char *type;
unsigned int cfg_base, found;
found = 0;
address = possible_addresses;
while (address->cfg_base) {
cfg_base = address->cfg_base;
/*printk(KERN_WARNING "%s(): probing: 0x%02x for: 0x%02x\n", __func__, cfg_base, address->type);*/
if (address->type & SMSCSIO_TYPE_FDC) {
type = "FDC";
if (address->type & SMSCSIO_TYPE_FLAT)
if (!smsc_superio_flat(fdc_chips_flat, cfg_base, type))
found++;
if (address->type & SMSCSIO_TYPE_PAGED)
if (!smsc_superio_paged(fdc_chips_paged, cfg_base, type))
found++;
}
if (address->type & SMSCSIO_TYPE_LPC) {
type = "LPC";
if (address->type & SMSCSIO_TYPE_FLAT)
if (!smsc_superio_flat(lpc_chips_flat, cfg_base, type))
found++;
if (address->type & SMSCSIO_TYPE_PAGED)
if (!smsc_superio_paged(lpc_chips_paged, cfg_base, type))
found++;
}
address++;
}
return found;
}
/*
* Function smsc_superio_flat (chip, base, type)
*
* Try to get configuration of a smc SuperIO chip with flat register model
*
*/
static int __init smsc_superio_flat(const struct smsc_chip *chips, unsigned short cfgbase, char *type)
{
unsigned short firbase, sirbase;
u8 mode, dma, irq;
int ret = -ENODEV;
IRDA_DEBUG(1, "%s\n", __func__);
if (smsc_ircc_probe(cfgbase, SMSCSIOFLAT_DEVICEID_REG, chips, type) == NULL)
return ret;
outb(SMSCSIOFLAT_UARTMODE0C_REG, cfgbase);
mode = inb(cfgbase + 1);
/*printk(KERN_WARNING "%s(): mode: 0x%02x\n", __func__, mode);*/
if (!(mode & SMSCSIOFLAT_UART2MODE_VAL_IRDA))
IRDA_WARNING("%s(): IrDA not enabled\n", __func__);
outb(SMSCSIOFLAT_UART2BASEADDR_REG, cfgbase);
sirbase = inb(cfgbase + 1) << 2;
/* FIR iobase */
outb(SMSCSIOFLAT_FIRBASEADDR_REG, cfgbase);
firbase = inb(cfgbase + 1) << 3;
/* DMA */
outb(SMSCSIOFLAT_FIRDMASELECT_REG, cfgbase);
dma = inb(cfgbase + 1) & SMSCSIOFLAT_FIRDMASELECT_MASK;
/* IRQ */
outb(SMSCSIOFLAT_UARTIRQSELECT_REG, cfgbase);
irq = inb(cfgbase + 1) & SMSCSIOFLAT_UART2IRQSELECT_MASK;
IRDA_MESSAGE("%s(): fir: 0x%02x, sir: 0x%02x, dma: %02d, irq: %d, mode: 0x%02x\n", __func__, firbase, sirbase, dma, irq, mode);
if (firbase && smsc_ircc_open(firbase, sirbase, dma, irq) == 0)
ret = 0;
/* Exit configuration */
outb(SMSCSIO_CFGEXITKEY, cfgbase);
return ret;
}
/*
* Function smsc_superio_paged (chip, base, type)
*
* Try to get configuration of a smc SuperIO chip with paged register model
*
*/
static int __init smsc_superio_paged(const struct smsc_chip *chips, unsigned short cfg_base, char *type)
{
unsigned short fir_io, sir_io;
int ret = -ENODEV;
IRDA_DEBUG(1, "%s\n", __func__);
if (smsc_ircc_probe(cfg_base, 0x20, chips, type) == NULL)
return ret;
/* Select logical device (UART2) */
outb(0x07, cfg_base);
outb(0x05, cfg_base + 1);
/* SIR iobase */
outb(0x60, cfg_base);
sir_io = inb(cfg_base + 1) << 8;
outb(0x61, cfg_base);
sir_io |= inb(cfg_base + 1);
/* Read FIR base */
outb(0x62, cfg_base);
fir_io = inb(cfg_base + 1) << 8;
outb(0x63, cfg_base);
fir_io |= inb(cfg_base + 1);
outb(0x2b, cfg_base); /* ??? */
if (fir_io && smsc_ircc_open(fir_io, sir_io, ircc_dma, ircc_irq) == 0)
ret = 0;
/* Exit configuration */
outb(SMSCSIO_CFGEXITKEY, cfg_base);
return ret;
}
static int __init smsc_access(unsigned short cfg_base, unsigned char reg)
{
IRDA_DEBUG(1, "%s\n", __func__);
outb(reg, cfg_base);
return inb(cfg_base) != reg ? -1 : 0;
}
static const struct smsc_chip * __init smsc_ircc_probe(unsigned short cfg_base, u8 reg, const struct smsc_chip *chip, char *type)
{
u8 devid, xdevid, rev;
IRDA_DEBUG(1, "%s\n", __func__);
/* Leave configuration */
outb(SMSCSIO_CFGEXITKEY, cfg_base);
if (inb(cfg_base) == SMSCSIO_CFGEXITKEY) /* not a smc superio chip */
return NULL;
outb(reg, cfg_base);
xdevid = inb(cfg_base + 1);
/* Enter configuration */
outb(SMSCSIO_CFGACCESSKEY, cfg_base);
#if 0
if (smsc_access(cfg_base,0x55)) /* send second key and check */
return NULL;
#endif
/* probe device ID */
if (smsc_access(cfg_base, reg))
return NULL;
devid = inb(cfg_base + 1);
if (devid == 0 || devid == 0xff) /* typical values for unused port */
return NULL;
/* probe revision ID */
if (smsc_access(cfg_base, reg + 1))
return NULL;
rev = inb(cfg_base + 1);
if (rev >= 128) /* i think this will make no sense */
return NULL;
if (devid == xdevid) /* protection against false positives */
return NULL;
/* Check for expected device ID; are there others? */
while (chip->devid != devid) {
chip++;
if (chip->name == NULL)
return NULL;
}
IRDA_MESSAGE("found SMC SuperIO Chip (devid=0x%02x rev=%02X base=0x%04x): %s%s\n",
devid, rev, cfg_base, type, chip->name);
if (chip->rev > rev) {
IRDA_MESSAGE("Revision higher than expected\n");
return NULL;
}
if (chip->flags & NoIRDA)
IRDA_MESSAGE("chipset does not support IRDA\n");
return chip;
}
static int __init smsc_superio_fdc(unsigned short cfg_base)
{
int ret = -1;
if (!request_region(cfg_base, 2, driver_name)) {
IRDA_WARNING("%s: can't get cfg_base of 0x%03x\n",
__func__, cfg_base);
} else {
if (!smsc_superio_flat(fdc_chips_flat, cfg_base, "FDC") ||
!smsc_superio_paged(fdc_chips_paged, cfg_base, "FDC"))
ret = 0;
release_region(cfg_base, 2);
}
return ret;
}
static int __init smsc_superio_lpc(unsigned short cfg_base)
{
int ret = -1;
if (!request_region(cfg_base, 2, driver_name)) {
IRDA_WARNING("%s: can't get cfg_base of 0x%03x\n",
__func__, cfg_base);
} else {
if (!smsc_superio_flat(lpc_chips_flat, cfg_base, "LPC") ||
!smsc_superio_paged(lpc_chips_paged, cfg_base, "LPC"))
ret = 0;
release_region(cfg_base, 2);
}
return ret;
}
/*
* Look for some specific subsystem setups that need
* pre-configuration not properly done by the BIOS (especially laptops)
* This code is based in part on smcinit.c, tosh1800-smcinit.c
* and tosh2450-smcinit.c. The table lists the device entries
* for ISA bridges with an LPC (Low Pin Count) controller which
* handles the communication with the SMSC device. After the LPC
* controller is initialized through PCI, the SMSC device is initialized
* through a dedicated port in the ISA port-mapped I/O area, this latter
* area is used to configure the SMSC device with default
* SIR and FIR I/O ports, DMA and IRQ. Different vendors have
* used different sets of parameters and different control port
* addresses making a subsystem device table necessary.
*/
#ifdef CONFIG_PCI
#define PCIID_VENDOR_INTEL 0x8086
#define PCIID_VENDOR_ALI 0x10b9
static struct smsc_ircc_subsystem_configuration subsystem_configurations[] __initdata = {
/*
* Subsystems needing entries:
* 0x10b9:0x1533 0x103c:0x0850 HP nx9010 family
* 0x10b9:0x1533 0x0e11:0x005a Compaq nc4000 family
* 0x8086:0x24cc 0x0e11:0x002a HP nx9000 family
*/
{
/* Guessed entry */
.vendor = PCIID_VENDOR_INTEL, /* Intel 82801DBM LPC bridge */
.device = 0x24cc,
.subvendor = 0x103c,
.subdevice = 0x08bc,
.sir_io = 0x02f8,
.fir_io = 0x0130,
.fir_irq = 0x05,
.fir_dma = 0x03,
.cfg_base = 0x004e,
.preconfigure = preconfigure_through_82801,
.name = "HP nx5000 family",
},
{
.vendor = PCIID_VENDOR_INTEL, /* Intel 82801DBM LPC bridge */
.device = 0x24cc,
.subvendor = 0x103c,
.subdevice = 0x088c,
/* Quite certain these are the same for nc8000 as for nc6000 */
.sir_io = 0x02f8,
.fir_io = 0x0130,
.fir_irq = 0x05,
.fir_dma = 0x03,
.cfg_base = 0x004e,
.preconfigure = preconfigure_through_82801,
.name = "HP nc8000 family",
},
{
.vendor = PCIID_VENDOR_INTEL, /* Intel 82801DBM LPC bridge */
.device = 0x24cc,
.subvendor = 0x103c,
.subdevice = 0x0890,
.sir_io = 0x02f8,
.fir_io = 0x0130,
.fir_irq = 0x05,
.fir_dma = 0x03,
.cfg_base = 0x004e,
.preconfigure = preconfigure_through_82801,
.name = "HP nc6000 family",
},
{
.vendor = PCIID_VENDOR_INTEL, /* Intel 82801DBM LPC bridge */
.device = 0x24cc,
.subvendor = 0x0e11,
.subdevice = 0x0860,
/* I assume these are the same for x1000 as for the others */
.sir_io = 0x02e8,
.fir_io = 0x02f8,
.fir_irq = 0x07,
.fir_dma = 0x03,
.cfg_base = 0x002e,
.preconfigure = preconfigure_through_82801,
.name = "Compaq x1000 family",
},
{
/* Intel 82801DB/DBL (ICH4/ICH4-L) LPC Interface Bridge */
.vendor = PCIID_VENDOR_INTEL,
.device = 0x24c0,
.subvendor = 0x1179,
.subdevice = 0xffff, /* 0xffff is "any" */
.sir_io = 0x03f8,
.fir_io = 0x0130,
.fir_irq = 0x07,
.fir_dma = 0x01,
.cfg_base = 0x002e,
.preconfigure = preconfigure_through_82801,
.name = "Toshiba laptop with Intel 82801DB/DBL LPC bridge",
},
{
.vendor = PCIID_VENDOR_INTEL, /* Intel 82801CAM ISA bridge */
.device = 0x248c,
.subvendor = 0x1179,
.subdevice = 0xffff, /* 0xffff is "any" */
.sir_io = 0x03f8,
.fir_io = 0x0130,
.fir_irq = 0x03,
.fir_dma = 0x03,
.cfg_base = 0x002e,
.preconfigure = preconfigure_through_82801,
.name = "Toshiba laptop with Intel 82801CAM ISA bridge",
},
{
/* 82801DBM (ICH4-M) LPC Interface Bridge */
.vendor = PCIID_VENDOR_INTEL,
.device = 0x24cc,
.subvendor = 0x1179,
.subdevice = 0xffff, /* 0xffff is "any" */
.sir_io = 0x03f8,
.fir_io = 0x0130,
.fir_irq = 0x03,
.fir_dma = 0x03,
.cfg_base = 0x002e,
.preconfigure = preconfigure_through_82801,
.name = "Toshiba laptop with Intel 8281DBM LPC bridge",
},
{
/* ALi M1533/M1535 PCI to ISA Bridge [Aladdin IV/V/V+] */
.vendor = PCIID_VENDOR_ALI,
.device = 0x1533,
.subvendor = 0x1179,
.subdevice = 0xffff, /* 0xffff is "any" */
.sir_io = 0x02e8,
.fir_io = 0x02f8,
.fir_irq = 0x07,
.fir_dma = 0x03,
.cfg_base = 0x002e,
.preconfigure = preconfigure_through_ali,
.name = "Toshiba laptop with ALi ISA bridge",
},
{ } // Terminator
};
/*
* This sets up the basic SMSC parameters
* (FIR port, SIR port, FIR DMA, FIR IRQ)
* through the chip configuration port.
*/
static int __init preconfigure_smsc_chip(struct
smsc_ircc_subsystem_configuration
*conf)
{
unsigned short iobase = conf->cfg_base;
unsigned char tmpbyte;
outb(LPC47N227_CFGACCESSKEY, iobase); // enter configuration state
outb(SMSCSIOFLAT_DEVICEID_REG, iobase); // set for device ID
tmpbyte = inb(iobase +1); // Read device ID
IRDA_DEBUG(0,
"Detected Chip id: 0x%02x, setting up registers...\n",
tmpbyte);
/* Disable UART1 and set up SIR I/O port */
outb(0x24, iobase); // select CR24 - UART1 base addr
outb(0x00, iobase + 1); // disable UART1
outb(SMSCSIOFLAT_UART2BASEADDR_REG, iobase); // select CR25 - UART2 base addr
outb( (conf->sir_io >> 2), iobase + 1); // bits 2-9 of 0x3f8
tmpbyte = inb(iobase + 1);
if (tmpbyte != (conf->sir_io >> 2) ) {
IRDA_WARNING("ERROR: could not configure SIR ioport.\n");
IRDA_WARNING("Try to supply ircc_cfg argument.\n");
return -ENXIO;
}
/* Set up FIR IRQ channel for UART2 */
outb(SMSCSIOFLAT_UARTIRQSELECT_REG, iobase); // select CR28 - UART1,2 IRQ select
tmpbyte = inb(iobase + 1);
tmpbyte &= SMSCSIOFLAT_UART1IRQSELECT_MASK; // Do not touch the UART1 portion
tmpbyte |= (conf->fir_irq & SMSCSIOFLAT_UART2IRQSELECT_MASK);
outb(tmpbyte, iobase + 1);
tmpbyte = inb(iobase + 1) & SMSCSIOFLAT_UART2IRQSELECT_MASK;
if (tmpbyte != conf->fir_irq) {
IRDA_WARNING("ERROR: could not configure FIR IRQ channel.\n");
return -ENXIO;
}
/* Set up FIR I/O port */
outb(SMSCSIOFLAT_FIRBASEADDR_REG, iobase); // CR2B - SCE (FIR) base addr
outb((conf->fir_io >> 3), iobase + 1);
tmpbyte = inb(iobase + 1);
if (tmpbyte != (conf->fir_io >> 3) ) {
IRDA_WARNING("ERROR: could not configure FIR I/O port.\n");
return -ENXIO;
}
/* Set up FIR DMA channel */
outb(SMSCSIOFLAT_FIRDMASELECT_REG, iobase); // CR2C - SCE (FIR) DMA select
outb((conf->fir_dma & LPC47N227_FIRDMASELECT_MASK), iobase + 1); // DMA
tmpbyte = inb(iobase + 1) & LPC47N227_FIRDMASELECT_MASK;
if (tmpbyte != (conf->fir_dma & LPC47N227_FIRDMASELECT_MASK)) {
IRDA_WARNING("ERROR: could not configure FIR DMA channel.\n");
return -ENXIO;
}
outb(SMSCSIOFLAT_UARTMODE0C_REG, iobase); // CR0C - UART mode
tmpbyte = inb(iobase + 1);
tmpbyte &= ~SMSCSIOFLAT_UART2MODE_MASK |
SMSCSIOFLAT_UART2MODE_VAL_IRDA;
outb(tmpbyte, iobase + 1); // enable IrDA (HPSIR) mode, high speed
outb(LPC47N227_APMBOOTDRIVE_REG, iobase); // CR07 - Auto Pwr Mgt/boot drive sel
tmpbyte = inb(iobase + 1);
outb(tmpbyte | LPC47N227_UART2AUTOPWRDOWN_MASK, iobase + 1); // enable UART2 autopower down
/* This one was not part of tosh1800 */
outb(0x0a, iobase); // CR0a - ecp fifo / ir mux
tmpbyte = inb(iobase + 1);
outb(tmpbyte | 0x40, iobase + 1); // send active device to ir port
outb(LPC47N227_UART12POWER_REG, iobase); // CR02 - UART 1,2 power
tmpbyte = inb(iobase + 1);
outb(tmpbyte | LPC47N227_UART2POWERDOWN_MASK, iobase + 1); // UART2 power up mode, UART1 power down
outb(LPC47N227_FDCPOWERVALIDCONF_REG, iobase); // CR00 - FDC Power/valid config cycle
tmpbyte = inb(iobase + 1);
outb(tmpbyte | LPC47N227_VALID_MASK, iobase + 1); // valid config cycle done
outb(LPC47N227_CFGEXITKEY, iobase); // Exit configuration
return 0;
}
/* 82801CAM generic registers */
#define VID 0x00
#define DID 0x02
#define PIRQ_A_D_ROUT 0x60
#define SIRQ_CNTL 0x64
#define PIRQ_E_H_ROUT 0x68
#define PCI_DMA_C 0x90
/* LPC-specific registers */
#define COM_DEC 0xe0
#define GEN1_DEC 0xe4
#define LPC_EN 0xe6
#define GEN2_DEC 0xec
/*
* Sets up the I/O range using the 82801CAM ISA bridge, 82801DBM LPC bridge
* or Intel 82801DB/DBL (ICH4/ICH4-L) LPC Interface Bridge.
* They all work the same way!
*/
static int __init preconfigure_through_82801(struct pci_dev *dev,
struct
smsc_ircc_subsystem_configuration
*conf)
{
unsigned short tmpword;
unsigned char tmpbyte;
IRDA_MESSAGE("Setting up Intel 82801 controller and SMSC device\n");
/*
* Select the range for the COMA COM port (SIR)
* Register COM_DEC:
* Bit 7: reserved
* Bit 6-4, COMB decode range
* Bit 3: reserved
* Bit 2-0, COMA decode range
*
* Decode ranges:
* 000 = 0x3f8-0x3ff (COM1)
* 001 = 0x2f8-0x2ff (COM2)
* 010 = 0x220-0x227
* 011 = 0x228-0x22f
* 100 = 0x238-0x23f
* 101 = 0x2e8-0x2ef (COM4)
* 110 = 0x338-0x33f
* 111 = 0x3e8-0x3ef (COM3)
*/
pci_read_config_byte(dev, COM_DEC, &tmpbyte);
tmpbyte &= 0xf8; /* mask COMA bits */
switch(conf->sir_io) {
case 0x3f8:
tmpbyte |= 0x00;
break;
case 0x2f8:
tmpbyte |= 0x01;
break;
case 0x220:
tmpbyte |= 0x02;
break;
case 0x228:
tmpbyte |= 0x03;
break;
case 0x238:
tmpbyte |= 0x04;
break;
case 0x2e8:
tmpbyte |= 0x05;
break;
case 0x338:
tmpbyte |= 0x06;
break;
case 0x3e8:
tmpbyte |= 0x07;
break;
default:
tmpbyte |= 0x01; /* COM2 default */
}
IRDA_DEBUG(1, "COM_DEC (write): 0x%02x\n", tmpbyte);
pci_write_config_byte(dev, COM_DEC, tmpbyte);
/* Enable Low Pin Count interface */
pci_read_config_word(dev, LPC_EN, &tmpword);
/* These seem to be set up at all times,
* just make sure it is properly set.
*/
switch(conf->cfg_base) {
case 0x04e:
tmpword |= 0x2000;
break;
case 0x02e:
tmpword |= 0x1000;
break;
case 0x062:
tmpword |= 0x0800;
break;
case 0x060:
tmpword |= 0x0400;
break;
default:
IRDA_WARNING("Uncommon I/O base address: 0x%04x\n",
conf->cfg_base);
break;
}
tmpword &= 0xfffd; /* disable LPC COMB */
tmpword |= 0x0001; /* set bit 0 : enable LPC COMA addr range (GEN2) */
IRDA_DEBUG(1, "LPC_EN (write): 0x%04x\n", tmpword);
pci_write_config_word(dev, LPC_EN, tmpword);
/*
* Configure LPC DMA channel
* PCI_DMA_C bits:
* Bit 15-14: DMA channel 7 select
* Bit 13-12: DMA channel 6 select
* Bit 11-10: DMA channel 5 select
* Bit 9-8: Reserved
* Bit 7-6: DMA channel 3 select
* Bit 5-4: DMA channel 2 select
* Bit 3-2: DMA channel 1 select
* Bit 1-0: DMA channel 0 select
* 00 = Reserved value
* 01 = PC/PCI DMA
* 10 = Reserved value
* 11 = LPC I/F DMA
*/
pci_read_config_word(dev, PCI_DMA_C, &tmpword);
switch(conf->fir_dma) {
case 0x07:
tmpword |= 0xc000;
break;
case 0x06:
tmpword |= 0x3000;
break;
case 0x05:
tmpword |= 0x0c00;
break;
case 0x03:
tmpword |= 0x00c0;
break;
case 0x02:
tmpword |= 0x0030;
break;
case 0x01:
tmpword |= 0x000c;
break;
case 0x00:
tmpword |= 0x0003;
break;
default:
break; /* do not change settings */
}
IRDA_DEBUG(1, "PCI_DMA_C (write): 0x%04x\n", tmpword);
pci_write_config_word(dev, PCI_DMA_C, tmpword);
/*
* GEN2_DEC bits:
* Bit 15-4: Generic I/O range
* Bit 3-1: reserved (read as 0)
* Bit 0: enable GEN2 range on LPC I/F
*/
tmpword = conf->fir_io & 0xfff8;
tmpword |= 0x0001;
IRDA_DEBUG(1, "GEN2_DEC (write): 0x%04x\n", tmpword);
pci_write_config_word(dev, GEN2_DEC, tmpword);
/* Pre-configure chip */
return preconfigure_smsc_chip(conf);
}
/*
* Pre-configure a certain port on the ALi 1533 bridge.
* This is based on reverse-engineering since ALi does not
* provide any data sheet for the 1533 chip.
*/
static void __init preconfigure_ali_port(struct pci_dev *dev,
unsigned short port)
{
unsigned char reg;
/* These bits obviously control the different ports */
unsigned char mask;
unsigned char tmpbyte;
switch(port) {
case 0x0130:
case 0x0178:
reg = 0xb0;
mask = 0x80;
break;
case 0x03f8:
reg = 0xb4;
mask = 0x80;
break;
case 0x02f8:
reg = 0xb4;
mask = 0x30;
break;
case 0x02e8:
reg = 0xb4;
mask = 0x08;
break;
default:
IRDA_ERROR("Failed to configure unsupported port on ALi 1533 bridge: 0x%04x\n", port);
return;
}
pci_read_config_byte(dev, reg, &tmpbyte);
/* Turn on the right bits */
tmpbyte |= mask;
pci_write_config_byte(dev, reg, tmpbyte);
IRDA_MESSAGE("Activated ALi 1533 ISA bridge port 0x%04x.\n", port);
}
static int __init preconfigure_through_ali(struct pci_dev *dev,
struct
smsc_ircc_subsystem_configuration
*conf)
{
/* Configure the two ports on the ALi 1533 */
preconfigure_ali_port(dev, conf->sir_io);
preconfigure_ali_port(dev, conf->fir_io);
/* Pre-configure chip */
return preconfigure_smsc_chip(conf);
}
static int __init smsc_ircc_preconfigure_subsystems(unsigned short ircc_cfg,
unsigned short ircc_fir,
unsigned short ircc_sir,
unsigned char ircc_dma,
unsigned char ircc_irq)
{
struct pci_dev *dev = NULL;
unsigned short ss_vendor = 0x0000;
unsigned short ss_device = 0x0000;
int ret = 0;
for_each_pci_dev(dev) {
struct smsc_ircc_subsystem_configuration *conf;
/*
* Cache the subsystem vendor/device:
* some manufacturers fail to set this for all components,
* so we save it in case there is just 0x0000 0x0000 on the
* device we want to check.
*/
if (dev->subsystem_vendor != 0x0000U) {
ss_vendor = dev->subsystem_vendor;
ss_device = dev->subsystem_device;
}
conf = subsystem_configurations;
for( ; conf->subvendor; conf++) {
if(conf->vendor == dev->vendor &&
conf->device == dev->device &&
conf->subvendor == ss_vendor &&
/* Sometimes these are cached values */
(conf->subdevice == ss_device ||
conf->subdevice == 0xffff)) {
struct smsc_ircc_subsystem_configuration
tmpconf;
memcpy(&tmpconf, conf,
sizeof(struct smsc_ircc_subsystem_configuration));
/*
* Override the default values with anything
* passed in as parameter
*/
if (ircc_cfg != 0)
tmpconf.cfg_base = ircc_cfg;
if (ircc_fir != 0)
tmpconf.fir_io = ircc_fir;
if (ircc_sir != 0)
tmpconf.sir_io = ircc_sir;
if (ircc_dma != DMA_INVAL)
tmpconf.fir_dma = ircc_dma;
if (ircc_irq != IRQ_INVAL)
tmpconf.fir_irq = ircc_irq;
IRDA_MESSAGE("Detected unconfigured %s SMSC IrDA chip, pre-configuring device.\n", conf->name);
if (conf->preconfigure)
ret = conf->preconfigure(dev, &tmpconf);
else
ret = -ENODEV;
}
}
}
return ret;
}
#endif // CONFIG_PCI
/************************************************
*
* Transceivers specific functions
*
************************************************/
/*
* Function smsc_ircc_set_transceiver_smsc_ircc_atc(fir_base, speed)
*
* Program transceiver through smsc-ircc ATC circuitry
*
*/
static void smsc_ircc_set_transceiver_smsc_ircc_atc(int fir_base, u32 speed)
{
unsigned long jiffies_now, jiffies_timeout;
u8 val;
jiffies_now = jiffies;
jiffies_timeout = jiffies + SMSC_IRCC2_ATC_PROGRAMMING_TIMEOUT_JIFFIES;
/* ATC */
register_bank(fir_base, 4);
outb((inb(fir_base + IRCC_ATC) & IRCC_ATC_MASK) | IRCC_ATC_nPROGREADY|IRCC_ATC_ENABLE,
fir_base + IRCC_ATC);
while ((val = (inb(fir_base + IRCC_ATC) & IRCC_ATC_nPROGREADY)) &&
!time_after(jiffies, jiffies_timeout))
/* empty */;
if (val)
IRDA_WARNING("%s(): ATC: 0x%02x\n", __func__,
inb(fir_base + IRCC_ATC));
}
/*
* Function smsc_ircc_probe_transceiver_smsc_ircc_atc(fir_base)
*
* Probe transceiver smsc-ircc ATC circuitry
*
*/
static int smsc_ircc_probe_transceiver_smsc_ircc_atc(int fir_base)
{
return 0;
}
/*
* Function smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select(self, speed)
*
* Set transceiver
*
*/
static void smsc_ircc_set_transceiver_smsc_ircc_fast_pin_select(int fir_base, u32 speed)
{
u8 fast_mode;
switch (speed) {
default:
case 576000 :
fast_mode = 0;
break;
case 1152000 :
case 4000000 :
fast_mode = IRCC_LCR_A_FAST;
break;
}
register_bank(fir_base, 0);
outb((inb(fir_base + IRCC_LCR_A) & 0xbf) | fast_mode, fir_base + IRCC_LCR_A);
}
/*
* Function smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select(fir_base)
*
* Probe transceiver
*
*/
static int smsc_ircc_probe_transceiver_smsc_ircc_fast_pin_select(int fir_base)
{
return 0;
}
/*
* Function smsc_ircc_set_transceiver_toshiba_sat1800(fir_base, speed)
*
* Set transceiver
*
*/
static void smsc_ircc_set_transceiver_toshiba_sat1800(int fir_base, u32 speed)
{
u8 fast_mode;
switch (speed) {
default:
case 576000 :
fast_mode = 0;
break;
case 1152000 :
case 4000000 :
fast_mode = /*IRCC_LCR_A_FAST |*/ IRCC_LCR_A_GP_DATA;
break;
}
/* This causes an interrupt */
register_bank(fir_base, 0);
outb((inb(fir_base + IRCC_LCR_A) & 0xbf) | fast_mode, fir_base + IRCC_LCR_A);
}
/*
* Function smsc_ircc_probe_transceiver_toshiba_sat1800(fir_base)
*
* Probe transceiver
*
*/
static int smsc_ircc_probe_transceiver_toshiba_sat1800(int fir_base)
{
return 0;
}
module_init(smsc_ircc_init);
module_exit(smsc_ircc_cleanup);
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