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linux/drivers/net/irda/smsc-ircc2.c
David Howells 7d12e780e0 IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:10:12 +01:00

2984 lines
76 KiB
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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)
* 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/slab.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 <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 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");
/* 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 sybsystem 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 net_device_stats stats;
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 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);
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 struct net_device_stats *smsc_ircc_net_get_stats(struct net_device *dev);
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 },
{ "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);
}
#ifdef CONFIG_PNP
/* 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);
#endif
/*******************************************************************************
*
*
* 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)
{
int ret;
IRDA_DEBUG(1, "%s\n", __FUNCTION__);
ret = platform_driver_register(&smsc_ircc_driver);
if (ret) {
IRDA_ERROR("%s, Can't register driver!\n", driver_name);
return ret;
}
#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
dev_count = 0;
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;
}
if (ret)
platform_driver_unregister(&smsc_ircc_driver);
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;
IRDA_DEBUG(1, "%s\n", __FUNCTION__);
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", __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;
dev->watchdog_timeo = HZ * 2; /* Allow enough time for speed change */
#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;
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",
__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);
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",
__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;
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 < 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;
} else
self->io.irq = chip_irq;
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;
} 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", __FUNCTION__, 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;
}
static struct net_device_stats *smsc_ircc_net_get_stats(struct net_device *dev)
{
struct smsc_ircc_cb *self = netdev_priv(dev);
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 = 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;
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;);
self = netdev_priv(dev);
IRDA_ASSERT(self != NULL, return 0;);
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 0;
}
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);
self->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 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;
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", __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);
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", __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 */
dev->hard_start_xmit = smsc_ircc_hard_xmit_fir;
/* 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", __FUNCTION__);
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", __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;
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
*
*/
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", __FUNCTION__, 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", __FUNCTION__, speed);
}
/*
* Function smsc_ircc_hard_xmit_fir (skb, dev)
*
* Transmit the frame!
*
*/
static int 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 0;);
self = netdev_priv(dev);
IRDA_ASSERT(self != NULL, return 0;);
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 0;
}
self->new_speed = speed;
}
memcpy(self->tx_buff.head, skb->data, 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 0;
}
/*
* 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", __FUNCTION__);
#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", __FUNCTION__);
#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->stats.tx_errors++;
self->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->stats.tx_packets++;
self->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", __FUNCTION__);
#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", __FUNCTION__,
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->stats.rx_errors++;
if (lsr & IRCC_LSR_FRAME_ERROR)
self->stats.rx_frame_errors++;
if (lsr & IRCC_LSR_CRC_ERROR)
self->stats.rx_crc_errors++;
if (lsr & IRCC_LSR_SIZE_ERROR)
self->stats.rx_length_errors++;
if (lsr & (IRCC_LSR_UNDERRUN | IRCC_LSR_OVERRUN))
self->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", __FUNCTION__, len);
return;
}
IRDA_DEBUG(2, "%s: msgcnt = %d, len=%d\n", __FUNCTION__, msgcnt, len);
skb = dev_alloc_skb(len + 1);
if (!skb) {
IRDA_WARNING("%s(), memory squeeze, dropping frame.\n",
__FUNCTION__);
return;
}
/* Make sure IP header gets aligned */
skb_reserve(skb, 1);
memcpy(skb_put(skb, len), self->rx_buff.data, len);
self->stats.rx_packets++;
self->stats.rx_bytes += len;
skb->dev = self->netdev;
skb->mac.raw = skb->data;
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->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", __FUNCTION__);
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 irq, void *dev_id)
{
struct net_device *dev = (struct net_device *) dev_id;
struct smsc_ircc_cb *self;
int iobase, iir, lcra, lsr;
irqreturn_t ret = IRQ_NONE;
if (dev == NULL) {
printk(KERN_WARNING "%s: irq %d for unknown device.\n",
driver_name, irq);
goto irq_ret;
}
self = netdev_priv(dev);
IRDA_ASSERT(self != NULL, return 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", __FUNCTION__, 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", __FUNCTION__);*/
}
/* 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);
irq_ret:
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",
__FUNCTION__, iir, lsr, iobase);
switch (iir) {
case UART_IIR_RLSI:
IRDA_DEBUG(2, "%s(), RLSI\n", __FUNCTION__);
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",
__FUNCTION__, 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", __FUNCTION__);
IRDA_ASSERT(self != NULL, return FALSE;);
IRDA_DEBUG(0, "%s: dma count = %d\n", __FUNCTION__,
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",
__FUNCTION__, 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", __FUNCTION__);
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", __FUNCTION__);
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",
__FUNCTION__, 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",
__FUNCTION__, 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", __FUNCTION__);
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", __FUNCTION__);
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", __FUNCTION__,
self->io.fir_base);
release_region(self->io.fir_base, self->io.fir_ext);
IRDA_DEBUG(0, "%s(), releasing 0x%03x\n", __FUNCTION__,
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", __FUNCTION__);
for (i = 0; i < 2; i++) {
if (dev_self[i])
smsc_ircc_close(dev_self[i]);
}
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
*/
void smsc_ircc_sir_start(struct smsc_ircc_cb *self)
{
struct net_device *dev;
int fir_base, sir_base;
IRDA_DEBUG(3, "%s\n", __FUNCTION__);
IRDA_ASSERT(self != NULL, return;);
dev = self->netdev;
IRDA_ASSERT(dev != NULL, return;);
dev->hard_start_xmit = &smsc_ircc_hard_xmit_sir;
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", __FUNCTION__);
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", __FUNCTION__);
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", __FUNCTION__);
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",
__FUNCTION__, 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->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", __FUNCTION__);
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", __FUNCTION__);
}
/* 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", __FUNCTION__, 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", __FUNCTION__);
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", __FUNCTION__, mode);*/
if (!(mode & SMSCSIOFLAT_UART2MODE_VAL_IRDA))
IRDA_WARNING("%s(): IrDA not enabled\n", __FUNCTION__);
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", __FUNCTION__, 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", __FUNCTION__);
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", __FUNCTION__);
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", __FUNCTION__);
/* 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",
__FUNCTION__, 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",
__FUNCTION__, 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);
return;
}
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;
dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev);
while (dev != NULL) {
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 != 0xff)
tmpconf.fir_dma = ircc_dma;
if (ircc_irq != 0xff)
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;
}
}
dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev);
}
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", __FUNCTION__,
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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