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linux-next/drivers/net/irda/ali-ircc.c
Chunyan Zhang 9f61e309c5 irda: ali-ircc: Replace timeval with ktime_t 
The ali ircc driver uses 'timeval', which we try to remove in the kernel
because all 32-bit time types will break in the year 2038.

This patch also changes do_gettimeofday() to ktime_get() accordingly,
since ktime_get returns a ktime_t, but do_gettimeofday returns a
struct timeval, and the other reason is that ktime_get() uses
the monotonic clock.

This patch uses ktime_us_delta to get the elapsed time, and in this
way it no longer needs to check for the overflow, because
ktime_us_delta returns time difference of microsecond.

Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-01-11 21:39:40 -05:00

2225 lines
52 KiB
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/*********************************************************************
*
* Filename: ali-ircc.h
* Version: 0.5
* Description: Driver for the ALI M1535D and M1543C FIR Controller
* Status: Experimental.
* Author: Benjamin Kong <benjamin_kong@ali.com.tw>
* Created at: 2000/10/16 03:46PM
* Modified at: 2001/1/3 02:55PM
* Modified by: Benjamin Kong <benjamin_kong@ali.com.tw>
* Modified at: 2003/11/6 and support for ALi south-bridge chipsets M1563
* Modified by: Clear Zhang <clear_zhang@ali.com.tw>
*
* Copyright (c) 2000 Benjamin Kong <benjamin_kong@ali.com.tw>
* 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.
*
********************************************************************/
#include <linux/module.h>
#include <linux/gfp.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/rtnetlink.h>
#include <linux/serial_reg.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/byteorder.h>
#include <net/irda/wrapper.h>
#include <net/irda/irda.h>
#include <net/irda/irda_device.h>
#include "ali-ircc.h"
#define CHIP_IO_EXTENT 8
#define BROKEN_DONGLE_ID
#define ALI_IRCC_DRIVER_NAME "ali-ircc"
/* Power Management */
static int ali_ircc_suspend(struct platform_device *dev, pm_message_t state);
static int ali_ircc_resume(struct platform_device *dev);
static struct platform_driver ali_ircc_driver = {
.suspend = ali_ircc_suspend,
.resume = ali_ircc_resume,
.driver = {
.name = ALI_IRCC_DRIVER_NAME,
},
};
/* Module parameters */
static int qos_mtt_bits = 0x07; /* 1 ms or more */
/* Use BIOS settions by default, but user may supply module parameters */
static unsigned int io[] = { ~0, ~0, ~0, ~0 };
static unsigned int irq[] = { 0, 0, 0, 0 };
static unsigned int dma[] = { 0, 0, 0, 0 };
static int ali_ircc_probe_53(ali_chip_t *chip, chipio_t *info);
static int ali_ircc_init_43(ali_chip_t *chip, chipio_t *info);
static int ali_ircc_init_53(ali_chip_t *chip, chipio_t *info);
/* These are the currently known ALi south-bridge chipsets, the only one difference
* is that M1543C doesn't support HP HDSL-3600
*/
static ali_chip_t chips[] =
{
{ "M1543", { 0x3f0, 0x370 }, 0x51, 0x23, 0x20, 0x43, ali_ircc_probe_53, ali_ircc_init_43 },
{ "M1535", { 0x3f0, 0x370 }, 0x51, 0x23, 0x20, 0x53, ali_ircc_probe_53, ali_ircc_init_53 },
{ "M1563", { 0x3f0, 0x370 }, 0x51, 0x23, 0x20, 0x63, ali_ircc_probe_53, ali_ircc_init_53 },
{ NULL }
};
/* Max 4 instances for now */
static struct ali_ircc_cb *dev_self[] = { NULL, NULL, NULL, NULL };
/* Dongle Types */
static char *dongle_types[] = {
"TFDS6000",
"HP HSDL-3600",
"HP HSDL-1100",
"No dongle connected",
};
/* Some prototypes */
static int ali_ircc_open(int i, chipio_t *info);
static int ali_ircc_close(struct ali_ircc_cb *self);
static int ali_ircc_setup(chipio_t *info);
static int ali_ircc_is_receiving(struct ali_ircc_cb *self);
static int ali_ircc_net_open(struct net_device *dev);
static int ali_ircc_net_close(struct net_device *dev);
static int ali_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
static void ali_ircc_change_speed(struct ali_ircc_cb *self, __u32 baud);
/* SIR function */
static netdev_tx_t ali_ircc_sir_hard_xmit(struct sk_buff *skb,
struct net_device *dev);
static irqreturn_t ali_ircc_sir_interrupt(struct ali_ircc_cb *self);
static void ali_ircc_sir_receive(struct ali_ircc_cb *self);
static void ali_ircc_sir_write_wakeup(struct ali_ircc_cb *self);
static int ali_ircc_sir_write(int iobase, int fifo_size, __u8 *buf, int len);
static void ali_ircc_sir_change_speed(struct ali_ircc_cb *priv, __u32 speed);
/* FIR function */
static netdev_tx_t ali_ircc_fir_hard_xmit(struct sk_buff *skb,
struct net_device *dev);
static void ali_ircc_fir_change_speed(struct ali_ircc_cb *priv, __u32 speed);
static irqreturn_t ali_ircc_fir_interrupt(struct ali_ircc_cb *self);
static int ali_ircc_dma_receive(struct ali_ircc_cb *self);
static int ali_ircc_dma_receive_complete(struct ali_ircc_cb *self);
static int ali_ircc_dma_xmit_complete(struct ali_ircc_cb *self);
static void ali_ircc_dma_xmit(struct ali_ircc_cb *self);
/* My Function */
static int ali_ircc_read_dongle_id (int i, chipio_t *info);
static void ali_ircc_change_dongle_speed(struct ali_ircc_cb *priv, int speed);
/* ALi chip function */
static void SIR2FIR(int iobase);
static void FIR2SIR(int iobase);
static void SetCOMInterrupts(struct ali_ircc_cb *self , unsigned char enable);
/*
* Function ali_ircc_init ()
*
* Initialize chip. Find out whay kinds of chips we are dealing with
* and their configuration registers address
*/
static int __init ali_ircc_init(void)
{
ali_chip_t *chip;
chipio_t info;
int ret;
int cfg, cfg_base;
int reg, revision;
int i = 0;
ret = platform_driver_register(&ali_ircc_driver);
if (ret) {
net_err_ratelimited("%s, Can't register driver!\n",
ALI_IRCC_DRIVER_NAME);
return ret;
}
ret = -ENODEV;
/* Probe for all the ALi chipsets we know about */
for (chip= chips; chip->name; chip++, i++)
{
pr_debug("%s(), Probing for %s ...\n", __func__, chip->name);
/* Try all config registers for this chip */
for (cfg=0; cfg<2; cfg++)
{
cfg_base = chip->cfg[cfg];
if (!cfg_base)
continue;
memset(&info, 0, sizeof(chipio_t));
info.cfg_base = cfg_base;
info.fir_base = io[i];
info.dma = dma[i];
info.irq = irq[i];
/* Enter Configuration */
outb(chip->entr1, cfg_base);
outb(chip->entr2, cfg_base);
/* Select Logical Device 5 Registers (UART2) */
outb(0x07, cfg_base);
outb(0x05, cfg_base+1);
/* Read Chip Identification Register */
outb(chip->cid_index, cfg_base);
reg = inb(cfg_base+1);
if (reg == chip->cid_value)
{
pr_debug("%s(), Chip found at 0x%03x\n",
__func__, cfg_base);
outb(0x1F, cfg_base);
revision = inb(cfg_base+1);
pr_debug("%s(), Found %s chip, revision=%d\n",
__func__, chip->name, revision);
/*
* If the user supplies the base address, then
* we init the chip, if not we probe the values
* set by the BIOS
*/
if (io[i] < 2000)
{
chip->init(chip, &info);
}
else
{
chip->probe(chip, &info);
}
if (ali_ircc_open(i, &info) == 0)
ret = 0;
i++;
}
else
{
pr_debug("%s(), No %s chip at 0x%03x\n",
__func__, chip->name, cfg_base);
}
/* Exit configuration */
outb(0xbb, cfg_base);
}
}
if (ret)
platform_driver_unregister(&ali_ircc_driver);
return ret;
}
/*
* Function ali_ircc_cleanup ()
*
* Close all configured chips
*
*/
static void __exit ali_ircc_cleanup(void)
{
int i;
for (i=0; i < ARRAY_SIZE(dev_self); i++) {
if (dev_self[i])
ali_ircc_close(dev_self[i]);
}
platform_driver_unregister(&ali_ircc_driver);
}
static const struct net_device_ops ali_ircc_sir_ops = {
.ndo_open = ali_ircc_net_open,
.ndo_stop = ali_ircc_net_close,
.ndo_start_xmit = ali_ircc_sir_hard_xmit,
.ndo_do_ioctl = ali_ircc_net_ioctl,
};
static const struct net_device_ops ali_ircc_fir_ops = {
.ndo_open = ali_ircc_net_open,
.ndo_stop = ali_ircc_net_close,
.ndo_start_xmit = ali_ircc_fir_hard_xmit,
.ndo_do_ioctl = ali_ircc_net_ioctl,
};
/*
* Function ali_ircc_open (int i, chipio_t *inf)
*
* Open driver instance
*
*/
static int ali_ircc_open(int i, chipio_t *info)
{
struct net_device *dev;
struct ali_ircc_cb *self;
int dongle_id;
int err;
if (i >= ARRAY_SIZE(dev_self)) {
net_err_ratelimited("%s(), maximum number of supported chips reached!\n",
__func__);
return -ENOMEM;
}
/* Set FIR FIFO and DMA Threshold */
if ((ali_ircc_setup(info)) == -1)
return -1;
dev = alloc_irdadev(sizeof(*self));
if (dev == NULL) {
net_err_ratelimited("%s(), can't allocate memory for control block!\n",
__func__);
return -ENOMEM;
}
self = netdev_priv(dev);
self->netdev = dev;
spin_lock_init(&self->lock);
/* Need to store self somewhere */
dev_self[i] = self;
self->index = i;
/* Initialize IO */
self->io.cfg_base = info->cfg_base; /* In ali_ircc_probe_53 assign */
self->io.fir_base = info->fir_base; /* info->sir_base = info->fir_base */
self->io.sir_base = info->sir_base; /* ALi SIR and FIR use the same address */
self->io.irq = info->irq;
self->io.fir_ext = CHIP_IO_EXTENT;
self->io.dma = info->dma;
self->io.fifo_size = 16; /* SIR: 16, FIR: 32 Benjamin 2000/11/1 */
/* Reserve the ioports that we need */
if (!request_region(self->io.fir_base, self->io.fir_ext,
ALI_IRCC_DRIVER_NAME)) {
net_warn_ratelimited("%s(), can't get iobase of 0x%03x\n",
__func__, self->io.fir_base);
err = -ENODEV;
goto err_out1;
}
/* Initialize QoS for this device */
irda_init_max_qos_capabilies(&self->qos);
/* The only value we must override it the baudrate */
self->qos.baud_rate.bits = IR_9600|IR_19200|IR_38400|IR_57600|
IR_115200|IR_576000|IR_1152000|(IR_4000000 << 8); // benjamin 2000/11/8 05:27PM
self->qos.min_turn_time.bits = qos_mtt_bits;
irda_qos_bits_to_value(&self->qos);
/* Max DMA buffer size needed = (data_size + 6) * (window_size) + 6; */
self->rx_buff.truesize = 14384;
self->tx_buff.truesize = 14384;
/* Allocate memory if needed */
self->rx_buff.head =
dma_zalloc_coherent(NULL, self->rx_buff.truesize,
&self->rx_buff_dma, GFP_KERNEL);
if (self->rx_buff.head == NULL) {
err = -ENOMEM;
goto err_out2;
}
self->tx_buff.head =
dma_zalloc_coherent(NULL, self->tx_buff.truesize,
&self->tx_buff_dma, GFP_KERNEL);
if (self->tx_buff.head == NULL) {
err = -ENOMEM;
goto err_out3;
}
self->rx_buff.in_frame = FALSE;
self->rx_buff.state = OUTSIDE_FRAME;
self->tx_buff.data = self->tx_buff.head;
self->rx_buff.data = self->rx_buff.head;
/* Reset Tx queue info */
self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
self->tx_fifo.tail = self->tx_buff.head;
/* Override the network functions we need to use */
dev->netdev_ops = &ali_ircc_sir_ops;
err = register_netdev(dev);
if (err) {
net_err_ratelimited("%s(), register_netdev() failed!\n",
__func__);
goto err_out4;
}
net_info_ratelimited("IrDA: Registered device %s\n", dev->name);
/* Check dongle id */
dongle_id = ali_ircc_read_dongle_id(i, info);
net_info_ratelimited("%s(), %s, Found dongle: %s\n",
__func__, ALI_IRCC_DRIVER_NAME,
dongle_types[dongle_id]);
self->io.dongle_id = dongle_id;
return 0;
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:
release_region(self->io.fir_base, self->io.fir_ext);
err_out1:
dev_self[i] = NULL;
free_netdev(dev);
return err;
}
/*
* Function ali_ircc_close (self)
*
* Close driver instance
*
*/
static int __exit ali_ircc_close(struct ali_ircc_cb *self)
{
int iobase;
IRDA_ASSERT(self != NULL, return -1;);
iobase = self->io.fir_base;
/* Remove netdevice */
unregister_netdev(self->netdev);
/* Release the PORT that this driver is using */
pr_debug("%s(), Releasing Region %03x\n", __func__, self->io.fir_base);
release_region(self->io.fir_base, self->io.fir_ext);
if (self->tx_buff.head)
dma_free_coherent(NULL, self->tx_buff.truesize,
self->tx_buff.head, self->tx_buff_dma);
if (self->rx_buff.head)
dma_free_coherent(NULL, self->rx_buff.truesize,
self->rx_buff.head, self->rx_buff_dma);
dev_self[self->index] = NULL;
free_netdev(self->netdev);
return 0;
}
/*
* Function ali_ircc_init_43 (chip, info)
*
* Initialize the ALi M1543 chip.
*/
static int ali_ircc_init_43(ali_chip_t *chip, chipio_t *info)
{
/* All controller information like I/O address, DMA channel, IRQ
* are set by BIOS
*/
return 0;
}
/*
* Function ali_ircc_init_53 (chip, info)
*
* Initialize the ALi M1535 chip.
*/
static int ali_ircc_init_53(ali_chip_t *chip, chipio_t *info)
{
/* All controller information like I/O address, DMA channel, IRQ
* are set by BIOS
*/
return 0;
}
/*
* Function ali_ircc_probe_53 (chip, info)
*
* Probes for the ALi M1535D or M1535
*/
static int ali_ircc_probe_53(ali_chip_t *chip, chipio_t *info)
{
int cfg_base = info->cfg_base;
int hi, low, reg;
/* Enter Configuration */
outb(chip->entr1, cfg_base);
outb(chip->entr2, cfg_base);
/* Select Logical Device 5 Registers (UART2) */
outb(0x07, cfg_base);
outb(0x05, cfg_base+1);
/* Read address control register */
outb(0x60, cfg_base);
hi = inb(cfg_base+1);
outb(0x61, cfg_base);
low = inb(cfg_base+1);
info->fir_base = (hi<<8) + low;
info->sir_base = info->fir_base;
pr_debug("%s(), probing fir_base=0x%03x\n", __func__, info->fir_base);
/* Read IRQ control register */
outb(0x70, cfg_base);
reg = inb(cfg_base+1);
info->irq = reg & 0x0f;
pr_debug("%s(), probing irq=%d\n", __func__, info->irq);
/* Read DMA channel */
outb(0x74, cfg_base);
reg = inb(cfg_base+1);
info->dma = reg & 0x07;
if(info->dma == 0x04)
net_warn_ratelimited("%s(), No DMA channel assigned !\n",
__func__);
else
pr_debug("%s(), probing dma=%d\n", __func__, info->dma);
/* Read Enabled Status */
outb(0x30, cfg_base);
reg = inb(cfg_base+1);
info->enabled = (reg & 0x80) && (reg & 0x01);
pr_debug("%s(), probing enabled=%d\n", __func__, info->enabled);
/* Read Power Status */
outb(0x22, cfg_base);
reg = inb(cfg_base+1);
info->suspended = (reg & 0x20);
pr_debug("%s(), probing suspended=%d\n", __func__, info->suspended);
/* Exit configuration */
outb(0xbb, cfg_base);
return 0;
}
/*
* Function ali_ircc_setup (info)
*
* Set FIR FIFO and DMA Threshold
* Returns non-negative on success.
*
*/
static int ali_ircc_setup(chipio_t *info)
{
unsigned char tmp;
int version;
int iobase = info->fir_base;
/* Locking comments :
* Most operations here need to be protected. We are called before
* the device instance is created in ali_ircc_open(), therefore
* nobody can bother us - Jean II */
/* Switch to FIR space */
SIR2FIR(iobase);
/* Master Reset */
outb(0x40, iobase+FIR_MCR); // benjamin 2000/11/30 11:45AM
/* Read FIR ID Version Register */
switch_bank(iobase, BANK3);
version = inb(iobase+FIR_ID_VR);
/* Should be 0x00 in the M1535/M1535D */
if(version != 0x00)
{
net_err_ratelimited("%s, Wrong chip version %02x\n",
ALI_IRCC_DRIVER_NAME, version);
return -1;
}
/* Set FIR FIFO Threshold Register */
switch_bank(iobase, BANK1);
outb(RX_FIFO_Threshold, iobase+FIR_FIFO_TR);
/* Set FIR DMA Threshold Register */
outb(RX_DMA_Threshold, iobase+FIR_DMA_TR);
/* CRC enable */
switch_bank(iobase, BANK2);
outb(inb(iobase+FIR_IRDA_CR) | IRDA_CR_CRC, iobase+FIR_IRDA_CR);
/* NDIS driver set TX Length here BANK2 Alias 3, Alias4*/
/* Switch to Bank 0 */
switch_bank(iobase, BANK0);
tmp = inb(iobase+FIR_LCR_B);
tmp &=~0x20; // disable SIP
tmp |= 0x80; // these two steps make RX mode
tmp &= 0xbf;
outb(tmp, iobase+FIR_LCR_B);
/* Disable Interrupt */
outb(0x00, iobase+FIR_IER);
/* Switch to SIR space */
FIR2SIR(iobase);
net_info_ratelimited("%s, driver loaded (Benjamin Kong)\n",
ALI_IRCC_DRIVER_NAME);
/* Enable receive interrupts */
// outb(UART_IER_RDI, iobase+UART_IER); //benjamin 2000/11/23 01:25PM
// Turn on the interrupts in ali_ircc_net_open
return 0;
}
/*
* Function ali_ircc_read_dongle_id (int index, info)
*
* Try to read dongle identification. This procedure needs to be executed
* once after power-on/reset. It also needs to be used whenever you suspect
* that the user may have plugged/unplugged the IrDA Dongle.
*/
static int ali_ircc_read_dongle_id (int i, chipio_t *info)
{
int dongle_id, reg;
int cfg_base = info->cfg_base;
/* Enter Configuration */
outb(chips[i].entr1, cfg_base);
outb(chips[i].entr2, cfg_base);
/* Select Logical Device 5 Registers (UART2) */
outb(0x07, cfg_base);
outb(0x05, cfg_base+1);
/* Read Dongle ID */
outb(0xf0, cfg_base);
reg = inb(cfg_base+1);
dongle_id = ((reg>>6)&0x02) | ((reg>>5)&0x01);
pr_debug("%s(), probing dongle_id=%d, dongle_types=%s\n",
__func__, dongle_id, dongle_types[dongle_id]);
/* Exit configuration */
outb(0xbb, cfg_base);
return dongle_id;
}
/*
* Function ali_ircc_interrupt (irq, dev_id, regs)
*
* An interrupt from the chip has arrived. Time to do some work
*
*/
static irqreturn_t ali_ircc_interrupt(int irq, void *dev_id)
{
struct net_device *dev = dev_id;
struct ali_ircc_cb *self;
int ret;
self = netdev_priv(dev);
spin_lock(&self->lock);
/* Dispatch interrupt handler for the current speed */
if (self->io.speed > 115200)
ret = ali_ircc_fir_interrupt(self);
else
ret = ali_ircc_sir_interrupt(self);
spin_unlock(&self->lock);
return ret;
}
/*
* Function ali_ircc_fir_interrupt(irq, struct ali_ircc_cb *self)
*
* Handle MIR/FIR interrupt
*
*/
static irqreturn_t ali_ircc_fir_interrupt(struct ali_ircc_cb *self)
{
__u8 eir, OldMessageCount;
int iobase, tmp;
iobase = self->io.fir_base;
switch_bank(iobase, BANK0);
self->InterruptID = inb(iobase+FIR_IIR);
self->BusStatus = inb(iobase+FIR_BSR);
OldMessageCount = (self->LineStatus + 1) & 0x07;
self->LineStatus = inb(iobase+FIR_LSR);
//self->ier = inb(iobase+FIR_IER); 2000/12/1 04:32PM
eir = self->InterruptID & self->ier; /* Mask out the interesting ones */
pr_debug("%s(), self->InterruptID = %x\n", __func__, self->InterruptID);
pr_debug("%s(), self->LineStatus = %x\n", __func__, self->LineStatus);
pr_debug("%s(), self->ier = %x\n", __func__, self->ier);
pr_debug("%s(), eir = %x\n", __func__, eir);
/* Disable interrupts */
SetCOMInterrupts(self, FALSE);
/* Tx or Rx Interrupt */
if (eir & IIR_EOM)
{
if (self->io.direction == IO_XMIT) /* TX */
{
pr_debug("%s(), ******* IIR_EOM (Tx) *******\n",
__func__);
if(ali_ircc_dma_xmit_complete(self))
{
if (irda_device_txqueue_empty(self->netdev))
{
/* Prepare for receive */
ali_ircc_dma_receive(self);
self->ier = IER_EOM;
}
}
else
{
self->ier = IER_EOM;
}
}
else /* RX */
{
pr_debug("%s(), ******* IIR_EOM (Rx) *******\n",
__func__);
if(OldMessageCount > ((self->LineStatus+1) & 0x07))
{
self->rcvFramesOverflow = TRUE;
pr_debug("%s(), ******* self->rcvFramesOverflow = TRUE ********\n",
__func__);
}
if (ali_ircc_dma_receive_complete(self))
{
pr_debug("%s(), ******* receive complete ********\n",
__func__);
self->ier = IER_EOM;
}
else
{
pr_debug("%s(), ******* Not receive complete ********\n",
__func__);
self->ier = IER_EOM | IER_TIMER;
}
}
}
/* Timer Interrupt */
else if (eir & IIR_TIMER)
{
if(OldMessageCount > ((self->LineStatus+1) & 0x07))
{
self->rcvFramesOverflow = TRUE;
pr_debug("%s(), ******* self->rcvFramesOverflow = TRUE *******\n",
__func__);
}
/* Disable Timer */
switch_bank(iobase, BANK1);
tmp = inb(iobase+FIR_CR);
outb( tmp& ~CR_TIMER_EN, iobase+FIR_CR);
/* Check if this is a Tx timer interrupt */
if (self->io.direction == IO_XMIT)
{
ali_ircc_dma_xmit(self);
/* Interrupt on EOM */
self->ier = IER_EOM;
}
else /* Rx */
{
if(ali_ircc_dma_receive_complete(self))
{
self->ier = IER_EOM;
}
else
{
self->ier = IER_EOM | IER_TIMER;
}
}
}
/* Restore Interrupt */
SetCOMInterrupts(self, TRUE);
return IRQ_RETVAL(eir);
}
/*
* Function ali_ircc_sir_interrupt (irq, self, eir)
*
* Handle SIR interrupt
*
*/
static irqreturn_t ali_ircc_sir_interrupt(struct ali_ircc_cb *self)
{
int iobase;
int iir, lsr;
iobase = self->io.sir_base;
iir = inb(iobase+UART_IIR) & UART_IIR_ID;
if (iir) {
/* Clear interrupt */
lsr = inb(iobase+UART_LSR);
pr_debug("%s(), iir=%02x, lsr=%02x, iobase=%#x\n",
__func__, iir, lsr, iobase);
switch (iir)
{
case UART_IIR_RLSI:
pr_debug("%s(), RLSI\n", __func__);
break;
case UART_IIR_RDI:
/* Receive interrupt */
ali_ircc_sir_receive(self);
break;
case UART_IIR_THRI:
if (lsr & UART_LSR_THRE)
{
/* Transmitter ready for data */
ali_ircc_sir_write_wakeup(self);
}
break;
default:
pr_debug("%s(), unhandled IIR=%#x\n",
__func__, iir);
break;
}
}
return IRQ_RETVAL(iir);
}
/*
* Function ali_ircc_sir_receive (self)
*
* Receive one frame from the infrared port
*
*/
static void ali_ircc_sir_receive(struct ali_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 too long */
if (boguscount++ > 32) {
pr_debug("%s(), breaking!\n", __func__);
break;
}
} while (inb(iobase+UART_LSR) & UART_LSR_DR);
}
/*
* Function ali_ircc_sir_write_wakeup (tty)
*
* Called by the driver when there's room for more data. If we have
* more packets to send, we send them here.
*
*/
static void ali_ircc_sir_write_wakeup(struct ali_ircc_cb *self)
{
int actual = 0;
int iobase;
IRDA_ASSERT(self != NULL, return;);
iobase = self->io.sir_base;
/* Finished with frame? */
if (self->tx_buff.len > 0)
{
/* Write data left in transmit buffer */
actual = ali_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->new_speed)
{
/* We must wait until all data are gone */
while(!(inb(iobase+UART_LSR) & UART_LSR_TEMT))
pr_debug("%s(), UART_LSR_THRE\n", __func__);
pr_debug("%s(), Changing speed! self->new_speed = %d\n",
__func__, self->new_speed);
ali_ircc_change_speed(self, self->new_speed);
self->new_speed = 0;
// benjamin 2000/11/10 06:32PM
if (self->io.speed > 115200)
{
pr_debug("%s(), ali_ircc_change_speed from UART_LSR_TEMT\n",
__func__);
self->ier = IER_EOM;
// SetCOMInterrupts(self, TRUE);
return;
}
}
else
{
netif_wake_queue(self->netdev);
}
self->netdev->stats.tx_packets++;
/* Turn on receive interrupts */
outb(UART_IER_RDI, iobase+UART_IER);
}
}
static void ali_ircc_change_speed(struct ali_ircc_cb *self, __u32 baud)
{
struct net_device *dev = self->netdev;
int iobase;
pr_debug("%s(), setting speed = %d\n", __func__, baud);
/* This function *must* be called with irq off and spin-lock.
* - Jean II */
iobase = self->io.fir_base;
SetCOMInterrupts(self, FALSE); // 2000/11/24 11:43AM
/* Go to MIR, FIR Speed */
if (baud > 115200)
{
ali_ircc_fir_change_speed(self, baud);
/* Install FIR xmit handler*/
dev->netdev_ops = &ali_ircc_fir_ops;
/* Enable Interuupt */
self->ier = IER_EOM; // benjamin 2000/11/20 07:24PM
/* Be ready for incoming frames */
ali_ircc_dma_receive(self); // benajmin 2000/11/8 07:46PM not complete
}
/* Go to SIR Speed */
else
{
ali_ircc_sir_change_speed(self, baud);
/* Install SIR xmit handler*/
dev->netdev_ops = &ali_ircc_sir_ops;
}
SetCOMInterrupts(self, TRUE); // 2000/11/24 11:43AM
netif_wake_queue(self->netdev);
}
static void ali_ircc_fir_change_speed(struct ali_ircc_cb *priv, __u32 baud)
{
int iobase;
struct ali_ircc_cb *self = priv;
struct net_device *dev;
IRDA_ASSERT(self != NULL, return;);
dev = self->netdev;
iobase = self->io.fir_base;
pr_debug("%s(), self->io.speed = %d, change to speed = %d\n",
__func__, self->io.speed, baud);
/* Come from SIR speed */
if(self->io.speed <=115200)
{
SIR2FIR(iobase);
}
/* Update accounting for new speed */
self->io.speed = baud;
// Set Dongle Speed mode
ali_ircc_change_dongle_speed(self, baud);
}
/*
* Function ali_sir_change_speed (self, speed)
*
* Set speed of IrDA port to specified baudrate
*
*/
static void ali_ircc_sir_change_speed(struct ali_ircc_cb *priv, __u32 speed)
{
struct ali_ircc_cb *self = priv;
unsigned long flags;
int iobase;
int fcr; /* FIFO control reg */
int lcr; /* Line control reg */
int divisor;
pr_debug("%s(), Setting speed to: %d\n", __func__, speed);
IRDA_ASSERT(self != NULL, return;);
iobase = self->io.sir_base;
/* Come from MIR or FIR speed */
if(self->io.speed >115200)
{
// Set Dongle Speed mode first
ali_ircc_change_dongle_speed(self, speed);
FIR2SIR(iobase);
}
// Clear Line and Auxiluary status registers 2000/11/24 11:47AM
inb(iobase+UART_LSR);
inb(iobase+UART_SCR);
/* Update accounting for new speed */
self->io.speed = speed;
spin_lock_irqsave(&self->lock, flags);
divisor = 115200/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.
*/
if (self->io.speed < 38400)
fcr |= UART_FCR_TRIGGER_1;
else
fcr |= 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 */
/* without this, the connection will be broken after come back from FIR speed,
but with this, the SIR connection is harder to established */
outb((UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2), iobase+UART_MCR);
spin_unlock_irqrestore(&self->lock, flags);
}
static void ali_ircc_change_dongle_speed(struct ali_ircc_cb *priv, int speed)
{
struct ali_ircc_cb *self = priv;
int iobase,dongle_id;
int tmp = 0;
iobase = self->io.fir_base; /* or iobase = self->io.sir_base; */
dongle_id = self->io.dongle_id;
/* We are already locked, no need to do it again */
pr_debug("%s(), Set Speed for %s , Speed = %d\n",
__func__, dongle_types[dongle_id], speed);
switch_bank(iobase, BANK2);
tmp = inb(iobase+FIR_IRDA_CR);
/* IBM type dongle */
if(dongle_id == 0)
{
if(speed == 4000000)
{
// __ __
// SD/MODE __| |__ __
// __ __
// IRTX __ __| |__
// T1 T2 T3 T4 T5
tmp &= ~IRDA_CR_HDLC; // HDLC=0
tmp |= IRDA_CR_CRC; // CRC=1
switch_bank(iobase, BANK2);
outb(tmp, iobase+FIR_IRDA_CR);
// T1 -> SD/MODE:0 IRTX:0
tmp &= ~0x09;
tmp |= 0x02;
outb(tmp, iobase+FIR_IRDA_CR);
udelay(2);
// T2 -> SD/MODE:1 IRTX:0
tmp &= ~0x01;
tmp |= 0x0a;
outb(tmp, iobase+FIR_IRDA_CR);
udelay(2);
// T3 -> SD/MODE:1 IRTX:1
tmp |= 0x0b;
outb(tmp, iobase+FIR_IRDA_CR);
udelay(2);
// T4 -> SD/MODE:0 IRTX:1
tmp &= ~0x08;
tmp |= 0x03;
outb(tmp, iobase+FIR_IRDA_CR);
udelay(2);
// T5 -> SD/MODE:0 IRTX:0
tmp &= ~0x09;
tmp |= 0x02;
outb(tmp, iobase+FIR_IRDA_CR);
udelay(2);
// reset -> Normal TX output Signal
outb(tmp & ~0x02, iobase+FIR_IRDA_CR);
}
else /* speed <=1152000 */
{
// __
// SD/MODE __| |__
//
// IRTX ________
// T1 T2 T3
/* MIR 115200, 57600 */
if (speed==1152000)
{
tmp |= 0xA0; //HDLC=1, 1.152Mbps=1
}
else
{
tmp &=~0x80; //HDLC 0.576Mbps
tmp |= 0x20; //HDLC=1,
}
tmp |= IRDA_CR_CRC; // CRC=1
switch_bank(iobase, BANK2);
outb(tmp, iobase+FIR_IRDA_CR);
/* MIR 115200, 57600 */
//switch_bank(iobase, BANK2);
// T1 -> SD/MODE:0 IRTX:0
tmp &= ~0x09;
tmp |= 0x02;
outb(tmp, iobase+FIR_IRDA_CR);
udelay(2);
// T2 -> SD/MODE:1 IRTX:0
tmp &= ~0x01;
tmp |= 0x0a;
outb(tmp, iobase+FIR_IRDA_CR);
// T3 -> SD/MODE:0 IRTX:0
tmp &= ~0x09;
tmp |= 0x02;
outb(tmp, iobase+FIR_IRDA_CR);
udelay(2);
// reset -> Normal TX output Signal
outb(tmp & ~0x02, iobase+FIR_IRDA_CR);
}
}
else if (dongle_id == 1) /* HP HDSL-3600 */
{
switch(speed)
{
case 4000000:
tmp &= ~IRDA_CR_HDLC; // HDLC=0
break;
case 1152000:
tmp |= 0xA0; // HDLC=1, 1.152Mbps=1
break;
case 576000:
tmp &=~0x80; // HDLC 0.576Mbps
tmp |= 0x20; // HDLC=1,
break;
}
tmp |= IRDA_CR_CRC; // CRC=1
switch_bank(iobase, BANK2);
outb(tmp, iobase+FIR_IRDA_CR);
}
else /* HP HDSL-1100 */
{
if(speed <= 115200) /* SIR */
{
tmp &= ~IRDA_CR_FIR_SIN; // HP sin select = 0
switch_bank(iobase, BANK2);
outb(tmp, iobase+FIR_IRDA_CR);
}
else /* MIR FIR */
{
switch(speed)
{
case 4000000:
tmp &= ~IRDA_CR_HDLC; // HDLC=0
break;
case 1152000:
tmp |= 0xA0; // HDLC=1, 1.152Mbps=1
break;
case 576000:
tmp &=~0x80; // HDLC 0.576Mbps
tmp |= 0x20; // HDLC=1,
break;
}
tmp |= IRDA_CR_CRC; // CRC=1
tmp |= IRDA_CR_FIR_SIN; // HP sin select = 1
switch_bank(iobase, BANK2);
outb(tmp, iobase+FIR_IRDA_CR);
}
}
switch_bank(iobase, BANK0);
}
/*
* Function ali_ircc_sir_write (driver)
*
* Fill Tx FIFO with transmit data
*
*/
static int ali_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)) {
pr_debug("%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 ali_ircc_net_open (dev)
*
* Start the device
*
*/
static int ali_ircc_net_open(struct net_device *dev)
{
struct ali_ircc_cb *self;
int iobase;
char hwname[32];
IRDA_ASSERT(dev != NULL, return -1;);
self = netdev_priv(dev);
IRDA_ASSERT(self != NULL, return 0;);
iobase = self->io.fir_base;
/* Request IRQ and install Interrupt Handler */
if (request_irq(self->io.irq, ali_ircc_interrupt, 0, dev->name, dev))
{
net_warn_ratelimited("%s, unable to allocate irq=%d\n",
ALI_IRCC_DRIVER_NAME, self->io.irq);
return -EAGAIN;
}
/*
* Always allocate the DMA channel after the IRQ, and clean up on
* failure.
*/
if (request_dma(self->io.dma, dev->name)) {
net_warn_ratelimited("%s, unable to allocate dma=%d\n",
ALI_IRCC_DRIVER_NAME, self->io.dma);
free_irq(self->io.irq, dev);
return -EAGAIN;
}
/* Turn on interrups */
outb(UART_IER_RDI , iobase+UART_IER);
/* Ready to play! */
netif_start_queue(dev); //benjamin by irport
/* Give self a hardware name */
sprintf(hwname, "ALI-FIR @ 0x%03x", self->io.fir_base);
/*
* Open new IrLAP layer instance, now that everything should be
* initialized properly
*/
self->irlap = irlap_open(dev, &self->qos, hwname);
return 0;
}
/*
* Function ali_ircc_net_close (dev)
*
* Stop the device
*
*/
static int ali_ircc_net_close(struct net_device *dev)
{
struct ali_ircc_cb *self;
//int iobase;
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;
disable_dma(self->io.dma);
/* Disable interrupts */
SetCOMInterrupts(self, FALSE);
free_irq(self->io.irq, dev);
free_dma(self->io.dma);
return 0;
}
/*
* Function ali_ircc_fir_hard_xmit (skb, dev)
*
* Transmit the frame
*
*/
static netdev_tx_t ali_ircc_fir_hard_xmit(struct sk_buff *skb,
struct net_device *dev)
{
struct ali_ircc_cb *self;
unsigned long flags;
int iobase;
__u32 speed;
int mtt, diff;
self = netdev_priv(dev);
iobase = self->io.fir_base;
netif_stop_queue(dev);
/* Make sure tests *& speed change are atomic */
spin_lock_irqsave(&self->lock, flags);
/* 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 */
/* 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) {
ali_ircc_change_speed(self, speed);
dev->trans_start = jiffies;
spin_unlock_irqrestore(&self->lock, flags);
dev_kfree_skb(skb);
return NETDEV_TX_OK;
} else
self->new_speed = speed;
}
/* Register and copy this frame to DMA memory */
self->tx_fifo.queue[self->tx_fifo.free].start = self->tx_fifo.tail;
self->tx_fifo.queue[self->tx_fifo.free].len = skb->len;
self->tx_fifo.tail += skb->len;
dev->stats.tx_bytes += skb->len;
skb_copy_from_linear_data(skb, self->tx_fifo.queue[self->tx_fifo.free].start,
skb->len);
self->tx_fifo.len++;
self->tx_fifo.free++;
/* Start transmit only if there is currently no transmit going on */
if (self->tx_fifo.len == 1)
{
/* Check if we must wait the min turn time or not */
mtt = irda_get_mtt(skb);
if (mtt)
{
/* Check how much time we have used already */
diff = ktime_us_delta(ktime_get(), self->stamp);
/* self->stamp is set from ali_ircc_dma_receive_complete() */
pr_debug("%s(), ******* diff = %d *******\n",
__func__, diff);
/* Check if the mtt is larger than the time we have
* already used by all the protocol processing
*/
if (mtt > diff)
{
mtt -= diff;
/*
* Use timer if delay larger than 1000 us, and
* use udelay for smaller values which should
* be acceptable
*/
if (mtt > 500)
{
/* Adjust for timer resolution */
mtt = (mtt+250) / 500; /* 4 discard, 5 get advanced, Let's round off */
pr_debug("%s(), ************** mtt = %d ***********\n",
__func__, mtt);
/* Setup timer */
if (mtt == 1) /* 500 us */
{
switch_bank(iobase, BANK1);
outb(TIMER_IIR_500, iobase+FIR_TIMER_IIR);
}
else if (mtt == 2) /* 1 ms */
{
switch_bank(iobase, BANK1);
outb(TIMER_IIR_1ms, iobase+FIR_TIMER_IIR);
}
else /* > 2ms -> 4ms */
{
switch_bank(iobase, BANK1);
outb(TIMER_IIR_2ms, iobase+FIR_TIMER_IIR);
}
/* Start timer */
outb(inb(iobase+FIR_CR) | CR_TIMER_EN, iobase+FIR_CR);
self->io.direction = IO_XMIT;
/* Enable timer interrupt */
self->ier = IER_TIMER;
SetCOMInterrupts(self, TRUE);
/* Timer will take care of the rest */
goto out;
}
else
udelay(mtt);
} // if (if (mtt > diff)
}// if (mtt)
/* Enable EOM interrupt */
self->ier = IER_EOM;
SetCOMInterrupts(self, TRUE);
/* Transmit frame */
ali_ircc_dma_xmit(self);
} // if (self->tx_fifo.len == 1)
out:
/* Not busy transmitting anymore if window is not full */
if (self->tx_fifo.free < MAX_TX_WINDOW)
netif_wake_queue(self->netdev);
/* Restore bank register */
switch_bank(iobase, BANK0);
dev->trans_start = jiffies;
spin_unlock_irqrestore(&self->lock, flags);
dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
static void ali_ircc_dma_xmit(struct ali_ircc_cb *self)
{
int iobase, tmp;
unsigned char FIFO_OPTI, Hi, Lo;
iobase = self->io.fir_base;
/* FIFO threshold , this method comes from NDIS5 code */
if(self->tx_fifo.queue[self->tx_fifo.ptr].len < TX_FIFO_Threshold)
FIFO_OPTI = self->tx_fifo.queue[self->tx_fifo.ptr].len-1;
else
FIFO_OPTI = TX_FIFO_Threshold;
/* Disable DMA */
switch_bank(iobase, BANK1);
outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
self->io.direction = IO_XMIT;
irda_setup_dma(self->io.dma,
((u8 *)self->tx_fifo.queue[self->tx_fifo.ptr].start -
self->tx_buff.head) + self->tx_buff_dma,
self->tx_fifo.queue[self->tx_fifo.ptr].len,
DMA_TX_MODE);
/* Reset Tx FIFO */
switch_bank(iobase, BANK0);
outb(LCR_A_FIFO_RESET, iobase+FIR_LCR_A);
/* Set Tx FIFO threshold */
if (self->fifo_opti_buf!=FIFO_OPTI)
{
switch_bank(iobase, BANK1);
outb(FIFO_OPTI, iobase+FIR_FIFO_TR) ;
self->fifo_opti_buf=FIFO_OPTI;
}
/* Set Tx DMA threshold */
switch_bank(iobase, BANK1);
outb(TX_DMA_Threshold, iobase+FIR_DMA_TR);
/* Set max Tx frame size */
Hi = (self->tx_fifo.queue[self->tx_fifo.ptr].len >> 8) & 0x0f;
Lo = self->tx_fifo.queue[self->tx_fifo.ptr].len & 0xff;
switch_bank(iobase, BANK2);
outb(Hi, iobase+FIR_TX_DSR_HI);
outb(Lo, iobase+FIR_TX_DSR_LO);
/* Disable SIP , Disable Brick Wall (we don't support in TX mode), Change to TX mode */
switch_bank(iobase, BANK0);
tmp = inb(iobase+FIR_LCR_B);
tmp &= ~0x20; // Disable SIP
outb(((unsigned char)(tmp & 0x3f) | LCR_B_TX_MODE) & ~LCR_B_BW, iobase+FIR_LCR_B);
pr_debug("%s(), *** Change to TX mode: FIR_LCR_B = 0x%x ***\n",
__func__, inb(iobase + FIR_LCR_B));
outb(0, iobase+FIR_LSR);
/* Enable DMA and Burst Mode */
switch_bank(iobase, BANK1);
outb(inb(iobase+FIR_CR) | CR_DMA_EN | CR_DMA_BURST, iobase+FIR_CR);
switch_bank(iobase, BANK0);
}
static int ali_ircc_dma_xmit_complete(struct ali_ircc_cb *self)
{
int iobase;
int ret = TRUE;
iobase = self->io.fir_base;
/* Disable DMA */
switch_bank(iobase, BANK1);
outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
/* Check for underrun! */
switch_bank(iobase, BANK0);
if((inb(iobase+FIR_LSR) & LSR_FRAME_ABORT) == LSR_FRAME_ABORT)
{
net_err_ratelimited("%s(), ********* LSR_FRAME_ABORT *********\n",
__func__);
self->netdev->stats.tx_errors++;
self->netdev->stats.tx_fifo_errors++;
}
else
{
self->netdev->stats.tx_packets++;
}
/* Check if we need to change the speed */
if (self->new_speed)
{
ali_ircc_change_speed(self, self->new_speed);
self->new_speed = 0;
}
/* Finished with this frame, so prepare for next */
self->tx_fifo.ptr++;
self->tx_fifo.len--;
/* Any frames to be sent back-to-back? */
if (self->tx_fifo.len)
{
ali_ircc_dma_xmit(self);
/* Not finished yet! */
ret = FALSE;
}
else
{ /* Reset Tx FIFO info */
self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
self->tx_fifo.tail = self->tx_buff.head;
}
/* Make sure we have room for more frames */
if (self->tx_fifo.free < MAX_TX_WINDOW) {
/* Not busy transmitting anymore */
/* Tell the network layer, that we can accept more frames */
netif_wake_queue(self->netdev);
}
switch_bank(iobase, BANK0);
return ret;
}
/*
* Function ali_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 ali_ircc_dma_receive(struct ali_ircc_cb *self)
{
int iobase, tmp;
iobase = self->io.fir_base;
/* Reset Tx FIFO info */
self->tx_fifo.len = self->tx_fifo.ptr = self->tx_fifo.free = 0;
self->tx_fifo.tail = self->tx_buff.head;
/* Disable DMA */
switch_bank(iobase, BANK1);
outb(inb(iobase+FIR_CR) & ~CR_DMA_EN, iobase+FIR_CR);
/* Reset Message Count */
switch_bank(iobase, BANK0);
outb(0x07, iobase+FIR_LSR);
self->rcvFramesOverflow = FALSE;
self->LineStatus = inb(iobase+FIR_LSR) ;
/* Reset Rx FIFO info */
self->io.direction = IO_RECV;
self->rx_buff.data = self->rx_buff.head;
/* Reset Rx FIFO */
// switch_bank(iobase, BANK0);
outb(LCR_A_FIFO_RESET, iobase+FIR_LCR_A);
self->st_fifo.len = self->st_fifo.pending_bytes = 0;
self->st_fifo.tail = self->st_fifo.head = 0;
irda_setup_dma(self->io.dma, self->rx_buff_dma, self->rx_buff.truesize,
DMA_RX_MODE);
/* Set Receive Mode,Brick Wall */
//switch_bank(iobase, BANK0);
tmp = inb(iobase+FIR_LCR_B);
outb((unsigned char)(tmp &0x3f) | LCR_B_RX_MODE | LCR_B_BW , iobase + FIR_LCR_B); // 2000/12/1 05:16PM
pr_debug("%s(), *** Change To RX mode: FIR_LCR_B = 0x%x ***\n",
__func__, inb(iobase + FIR_LCR_B));
/* Set Rx Threshold */
switch_bank(iobase, BANK1);
outb(RX_FIFO_Threshold, iobase+FIR_FIFO_TR);
outb(RX_DMA_Threshold, iobase+FIR_DMA_TR);
/* Enable DMA and Burst Mode */
// switch_bank(iobase, BANK1);
outb(CR_DMA_EN | CR_DMA_BURST, iobase+FIR_CR);
switch_bank(iobase, BANK0);
return 0;
}
static int ali_ircc_dma_receive_complete(struct ali_ircc_cb *self)
{
struct st_fifo *st_fifo;
struct sk_buff *skb;
__u8 status, MessageCount;
int len, i, iobase, val;
st_fifo = &self->st_fifo;
iobase = self->io.fir_base;
switch_bank(iobase, BANK0);
MessageCount = inb(iobase+ FIR_LSR)&0x07;
if (MessageCount > 0)
pr_debug("%s(), Message count = %d\n", __func__, MessageCount);
for (i=0; i<=MessageCount; i++)
{
/* Bank 0 */
switch_bank(iobase, BANK0);
status = inb(iobase+FIR_LSR);
switch_bank(iobase, BANK2);
len = inb(iobase+FIR_RX_DSR_HI) & 0x0f;
len = len << 8;
len |= inb(iobase+FIR_RX_DSR_LO);
pr_debug("%s(), RX Length = 0x%.2x,\n", __func__ , len);
pr_debug("%s(), RX Status = 0x%.2x,\n", __func__ , status);
if (st_fifo->tail >= MAX_RX_WINDOW) {
pr_debug("%s(), window is full!\n", __func__);
continue;
}
st_fifo->entries[st_fifo->tail].status = status;
st_fifo->entries[st_fifo->tail].len = len;
st_fifo->pending_bytes += len;
st_fifo->tail++;
st_fifo->len++;
}
for (i=0; i<=MessageCount; i++)
{
/* Get first entry */
status = st_fifo->entries[st_fifo->head].status;
len = st_fifo->entries[st_fifo->head].len;
st_fifo->pending_bytes -= len;
st_fifo->head++;
st_fifo->len--;
/* Check for errors */
if ((status & 0xd8) || self->rcvFramesOverflow || (len==0))
{
pr_debug("%s(), ************* RX Errors ************\n",
__func__);
/* Skip frame */
self->netdev->stats.rx_errors++;
self->rx_buff.data += len;
if (status & LSR_FIFO_UR)
{
self->netdev->stats.rx_frame_errors++;
pr_debug("%s(), ************* FIFO Errors ************\n",
__func__);
}
if (status & LSR_FRAME_ERROR)
{
self->netdev->stats.rx_frame_errors++;
pr_debug("%s(), ************* FRAME Errors ************\n",
__func__);
}
if (status & LSR_CRC_ERROR)
{
self->netdev->stats.rx_crc_errors++;
pr_debug("%s(), ************* CRC Errors ************\n",
__func__);
}
if(self->rcvFramesOverflow)
{
self->netdev->stats.rx_frame_errors++;
pr_debug("%s(), ************* Overran DMA buffer ************\n",
__func__);
}
if(len == 0)
{
self->netdev->stats.rx_frame_errors++;
pr_debug("%s(), ********** Receive Frame Size = 0 *********\n",
__func__);
}
}
else
{
if (st_fifo->pending_bytes < 32)
{
switch_bank(iobase, BANK0);
val = inb(iobase+FIR_BSR);
if ((val& BSR_FIFO_NOT_EMPTY)== 0x80)
{
pr_debug("%s(), ************* BSR_FIFO_NOT_EMPTY ************\n",
__func__);
/* Put this entry back in fifo */
st_fifo->head--;
st_fifo->len++;
st_fifo->pending_bytes += len;
st_fifo->entries[st_fifo->head].status = status;
st_fifo->entries[st_fifo->head].len = len;
/*
* DMA not finished yet, so try again
* later, set timer value, resolution
* 500 us
*/
switch_bank(iobase, BANK1);
outb(TIMER_IIR_500, iobase+FIR_TIMER_IIR); // 2001/1/2 05:07PM
/* Enable Timer */
outb(inb(iobase+FIR_CR) | CR_TIMER_EN, iobase+FIR_CR);
return FALSE; /* I'll be back! */
}
}
/*
* Remember the time we received this frame, so we can
* reduce the min turn time a bit since we will know
* how much time we have used for protocol processing
*/
self->stamp = ktime_get();
skb = dev_alloc_skb(len+1);
if (skb == NULL)
{
self->netdev->stats.rx_dropped++;
return FALSE;
}
/* Make sure IP header gets aligned */
skb_reserve(skb, 1);
/* Copy frame without CRC, CRC is removed by hardware*/
skb_put(skb, len);
skb_copy_to_linear_data(skb, self->rx_buff.data, len);
/* Move to next frame */
self->rx_buff.data += len;
self->netdev->stats.rx_bytes += len;
self->netdev->stats.rx_packets++;
skb->dev = self->netdev;
skb_reset_mac_header(skb);
skb->protocol = htons(ETH_P_IRDA);
netif_rx(skb);
}
}
switch_bank(iobase, BANK0);
return TRUE;
}
/*
* Function ali_ircc_sir_hard_xmit (skb, dev)
*
* Transmit the frame!
*
*/
static netdev_tx_t ali_ircc_sir_hard_xmit(struct sk_buff *skb,
struct net_device *dev)
{
struct ali_ircc_cb *self;
unsigned long flags;
int iobase;
__u32 speed;
IRDA_ASSERT(dev != NULL, return NETDEV_TX_OK;);
self = netdev_priv(dev);
IRDA_ASSERT(self != NULL, return NETDEV_TX_OK;);
iobase = self->io.sir_base;
netif_stop_queue(dev);
/* Make sure tests *& speed change are atomic */
spin_lock_irqsave(&self->lock, flags);
/* 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 */
/* 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) {
ali_ircc_change_speed(self, speed);
dev->trans_start = jiffies;
spin_unlock_irqrestore(&self->lock, flags);
dev_kfree_skb(skb);
return NETDEV_TX_OK;
} else
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->netdev->stats.tx_bytes += self->tx_buff.len;
/* Turn on transmit finished interrupt. Will fire immediately! */
outb(UART_IER_THRI, iobase+UART_IER);
dev->trans_start = jiffies;
spin_unlock_irqrestore(&self->lock, flags);
dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
/*
* Function ali_ircc_net_ioctl (dev, rq, cmd)
*
* Process IOCTL commands for this device
*
*/
static int ali_ircc_net_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
struct if_irda_req *irq = (struct if_irda_req *) rq;
struct ali_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;);
pr_debug("%s(), %s, (cmd=0x%X)\n", __func__ , dev->name, cmd);
switch (cmd) {
case SIOCSBANDWIDTH: /* Set bandwidth */
pr_debug("%s(), SIOCSBANDWIDTH\n", __func__);
/*
* This function will also be used by IrLAP to change the
* speed, so we still must allow for speed change within
* interrupt context.
*/
if (!in_interrupt() && !capable(CAP_NET_ADMIN))
return -EPERM;
spin_lock_irqsave(&self->lock, flags);
ali_ircc_change_speed(self, irq->ifr_baudrate);
spin_unlock_irqrestore(&self->lock, flags);
break;
case SIOCSMEDIABUSY: /* Set media busy */
pr_debug("%s(), SIOCSMEDIABUSY\n", __func__);
if (!capable(CAP_NET_ADMIN))
return -EPERM;
irda_device_set_media_busy(self->netdev, TRUE);
break;
case SIOCGRECEIVING: /* Check if we are receiving right now */
pr_debug("%s(), SIOCGRECEIVING\n", __func__);
/* This is protected */
irq->ifr_receiving = ali_ircc_is_receiving(self);
break;
default:
ret = -EOPNOTSUPP;
}
return ret;
}
/*
* Function ali_ircc_is_receiving (self)
*
* Return TRUE is we are currently receiving a frame
*
*/
static int ali_ircc_is_receiving(struct ali_ircc_cb *self)
{
unsigned long flags;
int status = FALSE;
int iobase;
IRDA_ASSERT(self != NULL, return FALSE;);
spin_lock_irqsave(&self->lock, flags);
if (self->io.speed > 115200)
{
iobase = self->io.fir_base;
switch_bank(iobase, BANK1);
if((inb(iobase+FIR_FIFO_FR) & 0x3f) != 0)
{
/* We are receiving something */
pr_debug("%s(), We are receiving something\n",
__func__);
status = TRUE;
}
switch_bank(iobase, BANK0);
}
else
{
status = (self->rx_buff.state != OUTSIDE_FRAME);
}
spin_unlock_irqrestore(&self->lock, flags);
return status;
}
static int ali_ircc_suspend(struct platform_device *dev, pm_message_t state)
{
struct ali_ircc_cb *self = platform_get_drvdata(dev);
net_info_ratelimited("%s, Suspending\n", ALI_IRCC_DRIVER_NAME);
if (self->io.suspended)
return 0;
ali_ircc_net_close(self->netdev);
self->io.suspended = 1;
return 0;
}
static int ali_ircc_resume(struct platform_device *dev)
{
struct ali_ircc_cb *self = platform_get_drvdata(dev);
if (!self->io.suspended)
return 0;
ali_ircc_net_open(self->netdev);
net_info_ratelimited("%s, Waking up\n", ALI_IRCC_DRIVER_NAME);
self->io.suspended = 0;
return 0;
}
/* ALi Chip Function */
static void SetCOMInterrupts(struct ali_ircc_cb *self , unsigned char enable)
{
unsigned char newMask;
int iobase = self->io.fir_base; /* or sir_base */
pr_debug("%s(), -------- Start -------- ( Enable = %d )\n",
__func__, enable);
/* Enable the interrupt which we wish to */
if (enable){
if (self->io.direction == IO_XMIT)
{
if (self->io.speed > 115200) /* FIR, MIR */
{
newMask = self->ier;
}
else /* SIR */
{
newMask = UART_IER_THRI | UART_IER_RDI;
}
}
else {
if (self->io.speed > 115200) /* FIR, MIR */
{
newMask = self->ier;
}
else /* SIR */
{
newMask = UART_IER_RDI;
}
}
}
else /* Disable all the interrupts */
{
newMask = 0x00;
}
//SIR and FIR has different registers
if (self->io.speed > 115200)
{
switch_bank(iobase, BANK0);
outb(newMask, iobase+FIR_IER);
}
else
outb(newMask, iobase+UART_IER);
}
static void SIR2FIR(int iobase)
{
//unsigned char tmp;
/* Already protected (change_speed() or setup()), no need to lock.
* Jean II */
outb(0x28, iobase+UART_MCR);
outb(0x68, iobase+UART_MCR);
outb(0x88, iobase+UART_MCR);
outb(0x60, iobase+FIR_MCR); /* Master Reset */
outb(0x20, iobase+FIR_MCR); /* Master Interrupt Enable */
//tmp = inb(iobase+FIR_LCR_B); /* SIP enable */
//tmp |= 0x20;
//outb(tmp, iobase+FIR_LCR_B);
}
static void FIR2SIR(int iobase)
{
unsigned char val;
/* Already protected (change_speed() or setup()), no need to lock.
* Jean II */
outb(0x20, iobase+FIR_MCR); /* IRQ to low */
outb(0x00, iobase+UART_IER);
outb(0xA0, iobase+FIR_MCR); /* Don't set master reset */
outb(0x00, iobase+UART_FCR);
outb(0x07, iobase+UART_FCR);
val = inb(iobase+UART_RX);
val = inb(iobase+UART_LSR);
val = inb(iobase+UART_MSR);
}
MODULE_AUTHOR("Benjamin Kong <benjamin_kong@ali.com.tw>");
MODULE_DESCRIPTION("ALi FIR Controller Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" ALI_IRCC_DRIVER_NAME);
module_param_array(io, int, NULL, 0);
MODULE_PARM_DESC(io, "Base I/O addresses");
module_param_array(irq, int, NULL, 0);
MODULE_PARM_DESC(irq, "IRQ lines");
module_param_array(dma, int, NULL, 0);
MODULE_PARM_DESC(dma, "DMA channels");
module_init(ali_ircc_init);
module_exit(ali_ircc_cleanup);
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