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* cpia_pp CPiA Parallel Port driver
*
* Supports CPiA based parallel port Video Camera's.
*
* (C) Copyright 1999 Bas Huisman <bhuism@cs.utwente.nl>
* (C) Copyright 1999-2000 Scott J. Bertin <sbertin@mindspring.com>,
* (C) Copyright 1999-2000 Peter Pregler <Peter_Pregler@email.com>
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/config.h>
#include <linux/version.h>
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0))
#undef CONFIG_VIDEO_CPIA_PP_DMA
#endif
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/parport.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/smp_lock.h>
#ifdef CONFIG_VIDEO_CPIA_PP_DMA
#include <asm/dma.h>
#endif
#ifdef CONFIG_KMOD
#include <linux/kmod.h>
#endif
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0))
/* If this is a module and parport_pc is not, some parport_pc_* functions
* are not directly availbale. parport.h messes this up.
* This fixes what we need.
*/
#if defined(MODULE) && !defined(CONFIG_PARPORT_PC_MODULE)
#define PARPORT_NEED_GENERIC_OPS
#undef parport_enable_irq
#undef parport_disable_irq
#undef parport_read_fifo
#define parport_read_fifo(p) (p)->ops->read_fifo(p)
#endif
/* These should be defined in linux/parport.h, but aren't. The #ifndef
* parport_enable_irq is in case they are at some future time.
*/
#ifdef PARPORT_NEED_GENERIC_OPS
#ifndef parport_enable_irq
#define parport_enable_irq(p) (p)->ops->enable_irq(p)
#define parport_disable_irq(p) (p)->ops->disable_irq(p)
#endif /* parport_enable_irq */
#else /* !PARPORT_NEED_GENERIC_OPS */
#ifndef parport_enable_irq
#define parport_enable_irq(p) parport_pc_enable_irq(p)
#define parport_disable_irq(p) parport_pc_disable_irq(p)
#endif /* parport_enable_irq */
#endif /* !PARPORT_NEED_GENERIC_OPS */
#endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0)) */
/* #define _CPIA_DEBUG_ define for verbose debug output */
#include "cpia.h"
static int cpia_pp_open(void *privdata);
static int cpia_pp_registerCallback(void *privdata, void (*cb) (void *cbdata),
void *cbdata);
static int cpia_pp_transferCmd(void *privdata, u8 *command, u8 *data);
static int cpia_pp_streamStart(void *privdata);
static int cpia_pp_streamStop(void *privdata);
static int cpia_pp_streamRead(void *privdata, u8 *buffer, int noblock);
static int cpia_pp_close(void *privdata);
#define ABOUT "Parallel port driver for Vision CPiA based cameras"
/* IEEE 1284 Compatiblity Mode signal names */
#define nStrobe PARPORT_CONTROL_STROBE /* inverted */
#define nAutoFd PARPORT_CONTROL_AUTOFD /* inverted */
#define nInit PARPORT_CONTROL_INIT
#define nSelectIn PARPORT_CONTROL_SELECT
#define IntrEnable PARPORT_CONTROL_INTEN /* normally zero for no IRQ */
#define DirBit PARPORT_CONTROL_DIRECTION /* 0 = Forward, 1 = Reverse */
#define nFault PARPORT_STATUS_ERROR
#define Select PARPORT_STATUS_SELECT
#define PError PARPORT_STATUS_PAPEROUT
#define nAck PARPORT_STATUS_ACK
#define Busy PARPORT_STATUS_BUSY /* inverted */
/* some more */
#define HostClk nStrobe
#define HostAck nAutoFd
#define nReverseRequest nInit
#define Active_1284 nSelectIn
#define nPeriphRequest nFault
#define XFlag Select
#define nAckReverse PError
#define PeriphClk nAck
#define PeriphAck Busy
/* these can be used to correct for the inversion on some bits */
#define STATUS_INVERSION_MASK (Busy)
#define CONTROL_INVERSION_MASK (nStrobe|nAutoFd|nSelectIn)
#define ECR_empty 0x01
#define ECR_full 0x02
#define ECR_serviceIntr 0x04
#define ECR_dmaEn 0x08
#define ECR_nErrIntrEn 0x10
#define ECR_mode_mask 0xE0
#define ECR_SPP_mode 0x00
#define ECR_PS2_mode 0x20
#define ECR_FIFO_mode 0x40
#define ECR_ECP_mode 0x60
#define ECP_FIFO_SIZE 16
#define DMA_BUFFER_SIZE PAGE_SIZE
/* for 16bit DMA make sure DMA_BUFFER_SIZE is 16 bit aligned */
#define PARPORT_CHUNK_SIZE PAGE_SIZE/* >=2.3.x */
/* we read this many bytes at once */
#define GetECRMasked(port,mask) (parport_read_econtrol(port) & (mask))
#define GetStatus(port) ((parport_read_status(port)^STATUS_INVERSION_MASK)&(0xf8))
#define SetStatus(port,val) parport_write_status(port,(val)^STATUS_INVERSION_MASK)
#define GetControl(port) ((parport_read_control(port)^CONTROL_INVERSION_MASK)&(0x3f))
#define SetControl(port,val) parport_write_control(port,(val)^CONTROL_INVERSION_MASK)
#define GetStatusMasked(port,mask) (GetStatus(port) & (mask))
#define GetControlMasked(port,mask) (GetControl(port) & (mask))
#define SetControlMasked(port,mask) SetControl(port,GetControl(port) | (mask));
#define ClearControlMasked(port,mask) SetControl(port,GetControl(port)&~(mask));
#define FrobControlBit(port,mask,value) SetControl(port,(GetControl(port)&~(mask))|((value)&(mask)));
#define PACKET_LENGTH 8
/* Magic numbers for defining port-device mappings */
#define PPCPIA_PARPORT_UNSPEC -4
#define PPCPIA_PARPORT_AUTO -3
#define PPCPIA_PARPORT_OFF -2
#define PPCPIA_PARPORT_NONE -1
#ifdef MODULE
static int parport_nr[PARPORT_MAX] = {[0 ... PARPORT_MAX - 1] = PPCPIA_PARPORT_UNSPEC};
static char *parport[PARPORT_MAX] = {NULL,};
MODULE_AUTHOR("B. Huisman <bhuism@cs.utwente.nl> & Peter Pregler <Peter_Pregler@email.com>");
MODULE_DESCRIPTION("Parallel port driver for Vision CPiA based cameras");
MODULE_PARM(parport, "1-" __MODULE_STRING(PARPORT_MAX) "s");
MODULE_PARM_DESC(parport, "'auto' or a list of parallel port numbers. Just like lp.");
#else
static int parport_nr[PARPORT_MAX] __initdata =
{[0 ... PARPORT_MAX - 1] = PPCPIA_PARPORT_UNSPEC};
static int parport_ptr = 0;
#endif
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0))
enum comstates { CPIA_FORWARD, CPIA_REVERSE }; //fixme
enum camstates {
CPIA_PHASE_idle = 0,
CPIA_PHASE_neg2s,
CPIA_PHASE_setup,
CPIA_PHASE_f2rev,
CPIA_PHASE_r2for,
CPIA_PHASE_term,
CPIA_PHASE_secpread,
CPIA_PHASE_ecpread,
CPIA_PHASE_secpwrite,
};
#ifdef _CPIA_DEBUG_
static char camstatesstr[12][40] =
{
"CPIA_PHASE_idle",
"CPIA_PHASE_neg2s",
"CPIA_PHASE_setup",
"CPIA_PHASE_f2rev",
"CPIA_PHASE_r2for",
"CPIA_PHASE_term",
"CPIA_PHASE_secpread",
"CPIA_PHASE_ecpread",
"CPIA_PHASE_secpwrite",
};
#endif
#endif
struct pp_cam_entry {
struct pardevice *pdev;
struct parport *port;
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0))
enum comstates state;
enum camstates camstate;
#endif
struct tq_struct cb_task;
int open_count;
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0))
struct wait_queue *wq_stream;
#else
wait_queue_head_t wq_stream;
#endif
/* image state flags */
int image_ready; /* we got an interrupt */
int image_complete; /* we have seen 4 EOI */
int streaming; /* we are in streaming mode */
int stream_irq;
#ifdef CONFIG_VIDEO_CPIA_PP_DMA
/* dma stuff */
int dma_on;
int dma_intr;
int block_size; /* read block_size bytes per DMA */
unsigned char *dma_buf; /* into dma_buf */
struct wait_queue *wq_dma;
struct tq_struct dma_task;
/* counters used in dma-interrupt handler */
unsigned char *buf; /* current position in read buffer */
int readbytes; /* # bytes read */
int bytes; /* maximum # of bytes to read */
int endseen; /* number of EOI read */
#endif
};
static struct cpia_camera_ops cpia_pp_ops =
{
cpia_pp_open,
cpia_pp_registerCallback,
cpia_pp_transferCmd,
cpia_pp_streamStart,
cpia_pp_streamStop,
cpia_pp_streamRead,
cpia_pp_close,
1
};
static struct cam_data *cam_list;
#ifdef _CPIA_DEBUG_
#define DEB_PORT(port) { \
u8 controll = GetControl(port); \
u8 statusss = GetStatus(port); \
DBG("nsel %c per %c naut %c nstrob %c nak %c busy %c nfaul %c sel %c init %c dir %c\n",\
((controll & nSelectIn) ? 'U' : 'D'), \
((statusss & PError) ? 'U' : 'D'), \
((controll & nAutoFd) ? 'U' : 'D'), \
((controll & nStrobe) ? 'U' : 'D'), \
((statusss & nAck) ? 'U' : 'D'), \
((statusss & Busy) ? 'U' : 'D'), \
((statusss & nFault) ? 'U' : 'D'), \
((statusss & Select) ? 'U' : 'D'), \
((controll & nInit) ? 'U' : 'D'), \
((controll & DirBit) ? 'R' : 'F') \
); }
#else
#define DEB_PORT(port) {}
#endif
#define WHILE_OUT_TIMEOUT (HZ/10)
#define DMA_TIMEOUT 10*HZ
/* FIXME */
static void cpia_parport_enable_irq( struct parport *port ) {
parport_enable_irq(port);
mdelay(10);
return;
}
static void cpia_parport_disable_irq( struct parport *port ) {
parport_disable_irq(port);
mdelay(10);
return;
}
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0))
static int while_out(struct pp_cam_entry *cam)
{
struct parport *port = cam->port;
unsigned long endjif;
if (GetECRMasked(port, ECR_full)) {
return 1;
}
endjif = jiffies + WHILE_OUT_TIMEOUT;
while( jiffies<endjif ) {
schedule();
if (GetECRMasked(port, ECR_full)) {
return 1;
}
}
DBG("WhileoutError at line waited %d\n", WHILE_OUT_TIMEOUT);
return 0;
}
static int my_wait_peripheral(struct parport *port, int mask, int result)
{
unsigned long oldjiffies = jiffies;
result &= mask;
if (GetStatusMasked(port, mask) == result) {
return 0;
}
while (jiffies < oldjiffies + (HZ / 3)) {
if (GetStatusMasked(port, mask) == result) {
return 0;
}
}
DBG("failed 0x%x should be 0x%x waited %ld jiffies\n", GetStatus(port) & mask, result, jiffies - oldjiffies);
return 1;
}
static void EmptyFifo(struct parport *port)
{
while (!GetECRMasked(port, ECR_empty)) {
parport_read_fifo(port);
}
}
/****************************************************************************
*
* Negotiate2Setup
*
***************************************************************************/
static int Negotiate2SetupPhase(struct pp_cam_entry *cam, int extensibility)
{
struct parport *port = cam->port;
u8 status = GetStatus(port);
u8 control = GetControl(port);
cam->camstate = CPIA_PHASE_neg2s;
if (control & nSelectIn) DBG("nSelIn should be low at beginning\n");
if (status & PError) DBG("PError should be low at beginning\n");
if (!(control & nAutoFd)) DBG("nAutFb should be high at beginning\n");
if (!(control & nStrobe)) DBG("nStrobe should be high at beginning\n");
/*
a high nack idicates a new image is ready (see the docs)
this line can be used for a ISR.
*/
//if (!(status & nAck)) DBG("nAck should be high at beginning\n");
if (!(status & Busy)) DBG("Busy should be high at beginning\n");
// FIXME ?if (status & nFault) DBG("nFault should be low at beginning\n");
if (!(status & Select)) DBG("Select should be high at beginning\n");
if (!(control & nInit)) DBG("nInit should be high at beginning\n");
if (cam->state != CPIA_FORWARD)
DBG("port was not in CPIA_FORWARD direction\n");
parport_write_data(port, extensibility ? 0x80 : 0x10);
FrobControlBit(port, nSelectIn | nAutoFd, nSelectIn); //A nAutoFd low,nSelectin high
if (my_wait_peripheral(port, PError | nFault | Select | nAck, PError | nFault | Select)) { //B
DBG("B failed\n");
return -1;
}
ClearControlMasked(port, nStrobe);
ClearControlMasked(port, nStrobe);
ClearControlMasked(port, nStrobe);
ClearControlMasked(port, nStrobe);
SetControlMasked(port, nAutoFd | nStrobe); // C
if (my_wait_peripheral(port, nAck | Select | PError, nAck | Select)) { // D niet perror+busy low ? nfault high ?
DBG("D failed nAck,nInit should become high, Perror low\n");
return -1;
}
if (extensibility) {
parport_write_data(port, 8 | 3);
ClearControlMasked(port, nStrobe);
if (my_wait_peripheral(port, nAck, 0)) {
DBG("nAck should go low in asking for extensibility mode\n");
DEB_PORT(port);
return -1;
}
SetControlMasked(port, nStrobe);
if (my_wait_peripheral(port, nAck | Select, nAck | Select)) {
DBG("nAck,Xflag should go high in asking for extensibility mode\n");
DEB_PORT(port);
return -1;
}
}
return 0;
}
/****************************************************************************
*
* EcpSetupPhase
*
***************************************************************************/
static int ECPSetupPhase(struct pp_cam_entry *cam)
{
cam->camstate = CPIA_PHASE_setup;
ClearControlMasked(cam->port, nAutoFd); // E
//if (my_wait_peripheral(cam->port,PError,PError)) //pport style
if (my_wait_peripheral(cam->port, PError | nAck | Busy, PError | nAck)) { // F
DBG("F failed PError,nAck high Busy Low\n");
DEB_PORT(cam->port);
return -1;
}
EmptyFifo(cam->port);
return 0;
}
/****************************************************************************
*
* Forward2Reverse
*
***************************************************************************/
static int Forward2Reverse(struct pp_cam_entry *cam)
{
struct parport *port = cam->port;
cam->camstate = CPIA_PHASE_f2rev;
SetControlMasked(port, DirBit); // door ClearControlBit(port,nReverseRequest) komt de eerste byte beter als DirBit hier wordt gezet
//mdelay(3);
ClearControlMasked(port, nReverseRequest); // G
//if (my_wait_peripheral(port,PError,0)) //pportq style
if (my_wait_peripheral(port, PError | Busy | nFault | Select, Busy | Select)) { //H
DBG("H failed\n");
DEB_PORT(port);
ClearControlMasked(port, DirBit); // DirBit repareren;
//mdelay(3);
return -1;
}
cam->state = CPIA_REVERSE;
return 0;
}
/****************************************************************************
*
* Reverse2Forward
*
***************************************************************************/
static void Reverse2Forward(struct pp_cam_entry *cam)
{
struct parport *port = cam->port;
cam->camstate = CPIA_PHASE_r2for;
if (cam->state != CPIA_REVERSE)
DBG("port was not in CPIA_REVERSE direction\n");
SetControlMasked(port, nReverseRequest);
if (my_wait_peripheral(port, nAckReverse, nAckReverse))
DBG("nAckReverse should fo high in Reverse2Forward\n");
ClearControlMasked(port, DirBit);
//mdelay(3);
cam->state = CPIA_FORWARD;
}
/****************************************************************************
*
* Valid1284Termination
*
***************************************************************************/
static void Valid1284Termination(struct pp_cam_entry *cam)
{
struct parport *port = cam->port;
cam->camstate = CPIA_PHASE_term;
if (cam->state != CPIA_FORWARD)
DBG("port was not in CPIA_FORWARD direction\n");
FrobControlBit(port, nSelectIn | nAutoFd | nStrobe | nInit, nAutoFd | nStrobe | nInit); //20
if (my_wait_peripheral(port, nAck, 0)) { //21
DBG("nAck should go low in Valid1284Termination\n");
DEB_PORT(port);
}
ClearControlMasked(port, nAutoFd); //22
if (my_wait_peripheral(port, nAck, nAck)) //23
DBG("nAck should go high again in Valid1284Termination\n");
SetControlMasked(port, nAutoFd); //24
if (my_wait_peripheral(port, PError | nAck | Busy | nFault | Select,
nAck | Busy | Select))
DBG("status bit did not go to the correct value\n");
cam->camstate = CPIA_PHASE_idle;
}
/****************************************************************************
*
* SimECPReadBuffer (does termination)
*
***************************************************************************/
static int SimECPReadBuffer(struct pp_cam_entry *cam, u8 *buf, int bytes)
{
int readbytes = 0;
struct parport *port = cam->port;
cam->camstate = CPIA_PHASE_secpread;
if (cam->state != CPIA_REVERSE) DBG("cam not in CPIA_REVERSE\n");
if (!GetControlMasked(port, DirBit))
DBG("parport is in forward mode, "
"guess you won't be reading much\n");
while (readbytes < bytes) {
ClearControlMasked(port, nAutoFd); //moet hier staan: als de while loop exit moet nAutoFd high blijven ...
if (my_wait_peripheral(port, nAck, 0)) {
DBG("nAck didn't went down after read %d bytes no more data ?\n", readbytes);
break;
}
*buf++ = parport_read_data(port);
SetControlMasked(port, nAutoFd);
readbytes++;
if (my_wait_peripheral(port, nAck, nAck)) {
DBG("nAck didn't went up after read %d bytes\n", readbytes);
break;
}
}
return readbytes;
}
/****************************************************************************
*
* ECPReadBuffer_PIO
*
***************************************************************************/
static int ECPReadBuffer_PIO(struct pp_cam_entry *cam, u8 *buf, int bytes)
{
int readbytes = 0, endseen = 0, j;
struct parport *port = cam->port;
if (my_wait_peripheral(port, nAck, 0)) {
DBG("nAck didn't went down after read %d bytes no more data ?\n", readbytes);
DEB_PORT(port);
goto WhileoutError;
}
*buf = parport_read_data(port); // we take the first byte manually
if (*buf == EOI) {
endseen++;
} else {
endseen = 0;
}
buf++;
readbytes++;
/* acknowledge for this BYTE */
SetControlMasked(port, nAutoFd);
if (my_wait_peripheral(port, nAck, nAck)) {
DBG("nAck didn't went up after read %d bytes\n", readbytes);
goto WhileoutError;
}
parport_frob_econtrol(port,
ECR_mode_mask|ECR_serviceIntr|ECR_dmaEn|ECR_nErrIntrEn,
ECR_ECP_mode|ECR_serviceIntr|ECR_nErrIntrEn);
while ((((bytes - readbytes) / ECP_FIFO_SIZE) > 0) && (endseen < 4)) {
if( current->need_resched ) {
schedule();
}
if (while_out(cam) <= 0) {
goto WhileoutError;
}
for (j = 0; j < ECP_FIFO_SIZE; j++) {
*buf = parport_read_fifo(port);
if (*buf == EOI) {
endseen++;
} else {
endseen = 0;
}
buf++;
readbytes++;
}
if( current->need_resched ) schedule();
}
/* switch off automatic filling of the FIFO */
ClearControlMasked(port, nAutoFd);
while ((!GetECRMasked(port, ECR_empty)) && (readbytes < bytes)) {
*buf = parport_read_fifo(port);
if (*buf == EOI) {
endseen++;
} else {
endseen = 0;
}
buf++;
readbytes++;
}
WhileoutError:
parport_write_econtrol(port, PARPORT_MODE_PCECR);
parport_frob_econtrol(port,
ECR_serviceIntr|ECR_dmaEn|ECR_nErrIntrEn,
ECR_serviceIntr|ECR_nErrIntrEn);
if( endseen > 3 ) {
cam->image_complete=1;
}
return readbytes;
}
#ifdef CONFIG_VIDEO_CPIA_PP_DMA
/****************************************************************************
*
* ECPReadBuffer_DMA
*
****************************************************************************/
int ECPReadBuffer_DMA(struct pp_cam_entry *cam, u8 *buf, int bytes)
{
struct parport *port = cam->port;
unsigned long flags;
int channel = port->dma;
int end_jiffies;
cam->buf=buf;
cam->bytes=bytes;
cam->endseen=0;
cam->readbytes=0;
cam->image_complete=0;
if (my_wait_peripheral(port,nAck,0)) {
DBG("nAck didn't went down after read %d bytes no more data ?\n",cam->readbytes);
DEB_PORT(port);
return cam->readbytes;
}
*(cam->buf) = parport_read_data(port); // we take the first byte manually
if (*(cam->buf) == EOI) {
cam->endseen++;
} else {
cam->endseen = 0;
}
cam->buf++;
cam->readbytes++;
/* acknowledge for this BYTE */
SetControlMasked( port, nAutoFd );
if (my_wait_peripheral(port,nAck,nAck)) {
DBG("nAck didn't went up after read %d bytes\n",cam->readbytes);
return cam->readbytes;
}
/* switch port to EPC mode, disable all interrupts for now */
parport_frob_econtrol(port, ECR_mode_mask, ECR_ECP_mode);
parport_frob_econtrol(port,
ECR_nErrIntrEn|ECR_serviceIntr|ECR_dmaEn,
ECR_nErrIntrEn|ECR_serviceIntr);
/* prepare controller for dma - align for 16bit DMA */
cam->block_size=
bytes<DMA_BUFFER_SIZE?(bytes+(bytes%2)):DMA_BUFFER_SIZE;
flags=claim_dma_lock();
disable_dma(channel);
clear_dma_ff(channel);
set_dma_mode(channel, DMA_MODE_READ);
set_dma_addr(channel, virt_to_bus(cam->dma_buf));
set_dma_count(channel, cam->block_size);
enable_dma(channel);
cam->dma_on=1;
cam->dma_intr = 0;
/* switch on dma transfer */
parport_frob_econtrol(port, ECR_dmaEn, ECR_dmaEn);
parport_frob_econtrol(port,ECR_serviceIntr, 0);
release_dma_lock(flags);
end_jiffies = jiffies+DMA_TIMEOUT;
while(cam->dma_on && !cam->image_complete &&
jiffies < end_jiffies
/*&& !signal_pending(current)*/) {
interruptible_sleep_on(&cam->wq_dma);
}
/* we are done with dma */
flags=claim_dma_lock();
if(cam->dma_on) {
cam->dma_on=0;
interruptible_sleep_on(&cam->wq_dma);
}
disable_dma(channel);
parport_frob_econtrol(port,ECR_mode_mask, ECR_PS2_mode);
parport_frob_econtrol(port,ECR_serviceIntr, ECR_serviceIntr);
parport_frob_econtrol(port, ECR_dmaEn, 0);
release_dma_lock(flags);
return cam->readbytes;
}
#endif /* CONFIG_VIDEO_CPIA_PP_DMA */
/****************************************************************************
*
* ECPReadBuffer (does termination) (stops when reading EOI)
*
****************************************************************************/
int ECPReadBuffer(struct pp_cam_entry *cam, u8 *buf, int bytes)
{
struct parport *port = cam->port;
int readbytes;
cam->camstate = CPIA_PHASE_ecpread;
if (cam->state != CPIA_REVERSE) DBG("cam not in CPIA_REVERSE\n");
if (!GetControlMasked(port,DirBit)) DBG("parport is in forward mode, guess you won't be reading much\n");
#ifdef CONFIG_VIDEO_CPIA_PP_DMA
if(cam->dma_buf) {
readbytes = ECPReadBuffer_DMA(cam, buf, bytes);
} else {
#endif
readbytes = ECPReadBuffer_PIO(cam, buf, bytes);
#ifdef CONFIG_VIDEO_CPIA_PP_DMA
}
#endif
return readbytes;
};
/****************************************************************************
*
* SimECPWriteBuffer (does termination)
*
***************************************************************************/
static int SimECPWriteBuffer(struct pp_cam_entry *cam, const u8 *buf, int size)
{
int written = 0;
struct parport *port = cam->port;
cam->camstate = CPIA_PHASE_secpwrite;
if (cam->state != CPIA_FORWARD) DBG("cam not in CPIA_FORWARD\n");
if (GetControlMasked(port, DirBit))
DBG("parport is in reverse mode, "
"guess you won't be writing much\n");
parport_write_data(port, *buf);
SetControlMasked(port, HostAck);
for (written = 0; written < size; written++) {
parport_write_data(port, *buf++);
ClearControlMasked(port, HostClk);
if (my_wait_peripheral(port, PeriphAck, PeriphAck)) {
DBG("PeriphAck never went up signaling read a byte\n");
break;
}
//DBG("written byte: %02x\n",*(u8*)(buf-1));
SetControlMasked(port, HostClk);
if (my_wait_peripheral(port, PeriphAck, 0)) {
DBG("PeriphAck never went down signaling ready for next byte\n");
break;
}
}
if (written != size)
DBG("failed; written %db should be %db\n", written, size);
return written;
}
#endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0)) */
/****************************************************************************
*
* EndTransferMode
*
***************************************************************************/
static void EndTransferMode(struct pp_cam_entry *cam)
{
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0))
if (cam->state == CPIA_REVERSE) Reverse2Forward(cam);
Valid1284Termination(cam);
if(cam->stream_irq) cpia_parport_enable_irq(cam->port);
#else
parport_negotiate(cam->port, IEEE1284_MODE_COMPAT);
#endif
}
/****************************************************************************
*
* ForwardSetup
*
***************************************************************************/
static int ForwardSetup(struct pp_cam_entry *cam)
{
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0))
if(cam->stream_irq) cpia_parport_disable_irq(cam->port);
if (!Negotiate2SetupPhase(cam, 0)) {
if (!ECPSetupPhase(cam)) {
return 0;
} else {
DBG("could not finish setup phase\n");
}
} else {
DBG("could not negotiate for setup phase\n");
}
EndTransferMode(cam);
return -1;
#else
int retry;
/* After some commands the camera needs extra time before
* it will respond again, so we try up to 3 times */
for(retry=0; retry<3; ++retry) {
if(!parport_negotiate(cam->port, IEEE1284_MODE_ECP)) {
break;
}
}
if(retry == 3) {
DBG("Unable to negotiate ECP mode\n");
return -1;
}
return 0;
#endif
}
/****************************************************************************
*
* ReverseSetup
*
***************************************************************************/
static int ReverseSetup(struct pp_cam_entry *cam, int extensibility)
{
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0))
if(cam->stream_irq) cpia_parport_disable_irq(cam->port);
if (!Negotiate2SetupPhase(cam, extensibility)) {
if (!ECPSetupPhase(cam)) {
if (!Forward2Reverse(cam)) {
return 0; /* don't terminate */
} else {
DBG("could not forward to reverse the port in order to read anything\n");
}
} else {
DBG("could not finish setup phase\n");
}
} else {
DBG("could not negotiate for setup phase\n");
}
EndTransferMode(cam);
return -1;
#else
int retry;
int mode = IEEE1284_MODE_ECP;
if(extensibility) mode = 8|3|IEEE1284_EXT_LINK;
/* After some commands the camera needs extra time before
* it will respond again, so we try up to 3 times */
for(retry=0; retry<3; ++retry) {
if(!parport_negotiate(cam->port, mode)) {
break;
}
}
if(retry == 3) {
if(extensibility)
DBG("Unable to negotiate extensibility mode\n");
else
DBG("Unable to negotiate ECP mode\n");
return -1;
}
if(extensibility) cam->port->ieee1284.mode = IEEE1284_MODE_ECP;
return 0;
#endif
}
#ifdef CONFIG_VIDEO_CPIA_PP_DMA
/****************************************************************************
*
* DMA routines
*
****************************************************************************/
/****************************************************************************
*
* Initiate a DMA read buffer
*
****************************************************************************/
static inline void receive_buf_dma(struct pp_cam_entry *cam, int num_bytes)
{
int channel = cam->port->dma;
disable_dma(channel);
clear_dma_ff(channel);
set_dma_mode(channel, DMA_MODE_READ);
set_dma_addr(channel, virt_to_bus(cam->dma_buf));
set_dma_count(channel, num_bytes);
enable_dma(channel);
parport_frob_econtrol(cam->port,ECR_serviceIntr, 0);
return;
}
static inline void stop_receive_buf_dma(struct pp_cam_entry *cam)
{
unsigned long flags;
flags=claim_dma_lock();
disable_dma(cam->port->dma);
cam->dma_on=0;
parport_frob_econtrol(cam->port,ECR_mode_mask, ECR_PS2_mode);
parport_frob_econtrol(cam->port,ECR_serviceIntr,
ECR_serviceIntr);
parport_frob_econtrol(cam->port, ECR_dmaEn, 0);
if( waitqueue_active(&cam->wq_dma) ) {
wake_up_interruptible(&cam->wq_dma);
}
release_dma_lock(flags);
return;
}
/****************************************************************************
*
* DMA bottom half
*
****************************************************************************/
static void dma_handler(void *handle)
{
struct pp_cam_entry *cam = handle;
int i;
unsigned char *dma_ptr, *buf_ptr;
unsigned long flags;
flags=claim_dma_lock();
disable_dma(cam->port->dma);
parport_frob_econtrol(cam->port,ECR_serviceIntr,
ECR_serviceIntr);
release_dma_lock(flags);
cam->dma_intr--;
if(cam->dma_intr) {
DBG("extra interrupt: %d\n", cam->dma_intr);
stop_receive_buf_dma(cam);
return;
}
if(cam->dma_on==0 || cam->image_complete) {
return;
}
flags=claim_dma_lock();
clear_dma_ff(cam->port->dma);
if((i=get_dma_residue(cam->port->dma))!=0) {
DBG("dma_residue: %d\n", i);
stop_receive_buf_dma(cam);
release_dma_lock(flags);
return;
}
release_dma_lock(flags);
if((i=cam->readbytes+cam->block_size)>cam->bytes) {
DBG("read too many bytes: %d/%d/%d\n",
i, cam->readbytes, cam->bytes);
stop_receive_buf_dma(cam);
return;
}
dma_ptr=cam->dma_buf;
buf_ptr=cam->buf;
i=-1;
while(++i<cam->block_size && cam->endseen<4) {
if(*dma_ptr==EOI) {
cam->endseen++;
} else {
cam->endseen=0;
}
(*buf_ptr++)=(*dma_ptr++);
}
cam->readbytes+=i;
cam->buf+=i;
if( cam->endseen==4 ) {
cam->image_complete=1;
stop_receive_buf_dma(cam);
return;
}
if( cam->bytes-cam->readbytes <= DMA_BUFFER_SIZE ) {
cam->block_size=cam->bytes-cam->readbytes;
cam->block_size=cam->block_size-(cam->block_size%2);
if( cam->block_size==0 ) {
stop_receive_buf_dma(cam);
return;
}
}
if( cam->dma_on) {
receive_buf_dma(cam, cam->block_size);
} else {
stop_receive_buf_dma(cam);
}
return;
}
#endif /* CONFIG_VIDEO_CPIA_PP_DMA */
/****************************************************************************
*
* IRQ handler
*
***************************************************************************/
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0))
static void cpia_pp_irq_handler(int irq, void *handle, struct pt_regs *b)
{
struct pp_cam_entry *cam = handle;
if (cam==NULL) {
return;
}
#ifdef CONFIG_VIDEO_CPIA_PP_DMA
if(cam->dma_on) {
cam->dma_intr++;
if( cam->dma_intr == 1 ) {
queue_task(&cam->dma_task, &tq_immediate);
mark_bh(IMMEDIATE_BH);
} else {
DBG("%d\n", cam->dma_intr);
}
return;
}
#endif /* CONFIG_VIDEO_CPIA_PP_DMA */
if (cam->camstate == CPIA_PHASE_ecpread) return;
if( cam->camstate != CPIA_PHASE_idle )
DBG("got IRQ(%d) when in %s\n",
irq, camstatesstr[cam->camstate]);
cam->image_ready++;
if(cam->image_ready > 1) {
cam->image_ready=0;
DBG("image skipped?\n");
}
if(cam->cb_task.routine!=0) {
queue_task(&cam->cb_task, &tq_scheduler);
}
if(waitqueue_active(&cam->wq_stream)) {
wake_up_interruptible(&cam->wq_stream);
}
return;
}
#endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0)) */
/****************************************************************************
*
* WritePacket
*
***************************************************************************/
static int WritePacket(struct pp_cam_entry *cam, const u8 *packet, size_t size)
{
int retval=0;
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0))
int size_written;
#endif
if (packet == NULL) {
return -EINVAL;
}
if (ForwardSetup(cam)) {
DBG("Write failed in setup\n");
return -EIO;
}
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0))
if (SimECPWriteBuffer(cam, packet, size) != size) {
retval = -EIO;
}
#else
size_written = parport_write(cam->port, packet, size);
if(size_written != size) {
DBG("Write failed, wrote %d/%d\n", size_written, size);
retval = -EIO;
}
#endif
EndTransferMode(cam);
return retval;
}
/****************************************************************************
*
* ReadPacket
*
***************************************************************************/
static int ReadPacket(struct pp_cam_entry *cam, u8 *packet, size_t size)
{
int retval=0;
if (packet == NULL) {
return -EINVAL;
}
if (ReverseSetup(cam, 0)) {
return -EIO;
}
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0))
if (SimECPReadBuffer(cam, packet, size) != size) {
retval = -EIO;
}
#else
if(parport_read(cam->port, packet, size) != size) {
retval = -EIO;
}
#endif
EndTransferMode(cam);
return retval;
}
/****************************************************************************
*
* cpia_pp_streamStart
*
***************************************************************************/
static int cpia_pp_streamStart(void *privdata)
{
struct pp_cam_entry *cam = privdata;
DBG("\n");
cam->streaming=1;
cam->image_ready=0;
//if (ReverseSetup(cam,1)) return -EIO;
if(cam->stream_irq) cpia_parport_enable_irq(cam->port);
return 0;
}
/****************************************************************************
*
* cpia_pp_streamStop
*
***************************************************************************/
static int cpia_pp_streamStop(void *privdata)
{
struct pp_cam_entry *cam = privdata;
DBG("\n");
cam->streaming=0;
cpia_parport_disable_irq(cam->port);
//EndTransferMode(cam);
return 0;
}
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0))
static int cpia_pp_read(struct parport *port, u8 *buffer, int len)
{
int bytes_read, new_bytes;
for(bytes_read=0; bytes_read<len; bytes_read += new_bytes) {
new_bytes = parport_read(port, buffer+bytes_read,
len-bytes_read);
if(new_bytes < 0) break;
}
return bytes_read;
}
#endif
/****************************************************************************
*
* cpia_pp_streamRead
*
***************************************************************************/
static int cpia_pp_streamRead(void *privdata, u8 *buffer, int noblock)
{
struct pp_cam_entry *cam = privdata;
int read_bytes = 0;
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0))
int i, endseen, block_size, new_bytes;
#endif
if(cam == NULL) {
DBG("Internal driver error: cam is NULL\n");
return -EINVAL;
}
if(buffer == NULL) {
DBG("Internal driver error: buffer is NULL\n");
return -EINVAL;
}
//if(cam->streaming) DBG("%d / %d\n", cam->image_ready, noblock);
if( cam->stream_irq ) {
DBG("%d\n", cam->image_ready);
cam->image_ready--;
}
cam->image_complete=0;
if (0/*cam->streaming*/) {
if(!cam->image_ready) {
if(noblock) return -EWOULDBLOCK;
interruptible_sleep_on(&cam->wq_stream);
if( signal_pending(current) ) return -EINTR;
DBG("%d\n", cam->image_ready);
}
} else {
if (ReverseSetup(cam, 1)) {
DBG("unable to ReverseSetup\n");
return -EIO;
}
}
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0))
read_bytes = ECPReadBuffer(cam, buffer, CPIA_MAX_IMAGE_SIZE);
if( 1/*!cam->streaming*/) {
EndTransferMode(cam);
}
if(!cam->image_complete) {
if( !signal_pending(current) )
DBG("incomplete image: %ld / %d / %d\n",
jiffies, cam->image_complete, read_bytes);
}
#else /* (LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)) */
endseen = 0;
block_size = PARPORT_CHUNK_SIZE;
while( !cam->image_complete ) {
if(current->need_resched) schedule();
new_bytes = cpia_pp_read(cam->port, buffer, block_size );
if( new_bytes <= 0 ) {
break;
}
i=-1;
while(++i<new_bytes && endseen<4) {
if(*buffer==EOI) {
endseen++;
} else {
endseen=0;
}
buffer++;
}
read_bytes += i;
if( endseen==4 ) {
cam->image_complete=1;
break;
}
if( CPIA_MAX_IMAGE_SIZE-read_bytes <= PARPORT_CHUNK_SIZE ) {
block_size=CPIA_MAX_IMAGE_SIZE-read_bytes;
}
}
EndTransferMode(cam);
#endif /* (LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)) */
return cam->image_complete ? read_bytes : -EIO;
}
/****************************************************************************
*
* cpia_pp_transferCmd
*
***************************************************************************/
static int cpia_pp_transferCmd(void *privdata, u8 *command, u8 *data)
{
int err;
int retval=0;
int databytes;
struct pp_cam_entry *cam = privdata;
if(cam == NULL) {
DBG("Internal driver error: cam is NULL\n");
return -EINVAL;
}
if(command == NULL) {
DBG("Internal driver error: command is NULL\n");
return -EINVAL;
}
databytes = (((int)command[7])<<8) | command[6];
if ((err = WritePacket(cam, command, PACKET_LENGTH)) < 0) {
DBG("Error writing command\n");
return err;
}
if(command[0] == DATA_IN) {
u8 buffer[8];
if(data == NULL) {
DBG("Internal driver error: data is NULL\n");
return -EINVAL;
}
if((err = ReadPacket(cam, buffer, 8)) < 0) {
return err;
DBG("Error reading command result\n");
}
memcpy(data, buffer, databytes);
} else if(command[0] == DATA_OUT) {
if(databytes > 0) {
if(data == NULL) {
DBG("Internal driver error: data is NULL\n");
retval = -EINVAL;
} else {
if((err=WritePacket(cam, data, databytes)) < 0){
DBG("Error writing command data\n");
return err;
}
}
}
} else {
DBG("Unexpected first byte of command: %x\n", command[0]);
retval = -EINVAL;
}
return retval;
}
/****************************************************************************
*
* cpia_pp_open
*
***************************************************************************/
static int cpia_pp_open(void *privdata)
{
struct pp_cam_entry *cam = (struct pp_cam_entry *)privdata;
if (cam == NULL)
return -EINVAL;
if(cam->open_count == 0) {
if (parport_claim(cam->pdev)) {
DBG("failed to claim the port\n");
return -EBUSY;
}
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0))
parport_write_econtrol(cam->port, PARPORT_MODE_PCECR);
parport_frob_econtrol(cam->port,
ECR_serviceIntr|ECR_dmaEn|ECR_nErrIntrEn,
ECR_serviceIntr|ECR_nErrIntrEn);
#ifdef CONFIG_VIDEO_CPIA_PP_DMA
cam->dma_task.routine=dma_handler;
cam->dma_task.data=cam;
#endif
cam->stream_irq=0;
cpia_parport_disable_irq(cam->port);
#else
parport_negotiate(cam->port, IEEE1284_MODE_COMPAT);
parport_data_forward(cam->port);
parport_write_control(cam->port, PARPORT_CONTROL_SELECT);
udelay(50);
parport_write_control(cam->port,
PARPORT_CONTROL_SELECT
| PARPORT_CONTROL_INIT);
#endif
}
++cam->open_count;
#ifdef MODULE
MOD_INC_USE_COUNT;
#endif
return 0;
}
/****************************************************************************
*
* cpia_pp_registerCallback
*
***************************************************************************/
static int cpia_pp_registerCallback(void *privdata, void (*cb)(void *cbdata), void *cbdata)
{
struct pp_cam_entry *cam = privdata;
int retval = 0;
if(cam->port->irq != PARPORT_IRQ_NONE) {
cam->cb_task.routine = cb;
cam->cb_task.data = cbdata;
} else {
retval = -1;
}
return retval;
}
/****************************************************************************
*
* cpia_pp_close
*
***************************************************************************/
static int cpia_pp_close(void *privdata)
{
struct pp_cam_entry *cam = privdata;
#ifdef CONFIG_VIDEO_CPIA_PP_DMA
unsigned int flags;
#endif
#ifdef MODULE
MOD_DEC_USE_COUNT;
#endif
if (--cam->open_count == 0) {
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0))
if (cam->port->irq != PARPORT_IRQ_NONE) {
cpia_parport_disable_irq(cam->port);
}
#ifdef CONFIG_VIDEO_CPIA_PP_DMA
save_flags(flags);
cli();
if (cam->dma_on) {
cam->dma_on=0;
interruptible_sleep_on(&cam->wq_dma);
}
restore_flags(flags);
#endif /* CONFIG_VIDEO_CPIA_PP_DMA */
if (waitqueue_active(&cam->wq_stream)) { /* FIXME */
wake_up(&cam->wq_stream);
}
#endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0)) */
parport_release(cam->pdev);
}
return 0;
}
/****************************************************************************
*
* cpia_pp_register
*
***************************************************************************/
static int cpia_pp_register(struct parport *port)
{
struct pardevice *pdev = NULL;
struct pp_cam_entry *cam;
struct cam_data *cpia;
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0))
if (!(port->modes & PARPORT_MODE_PCECP)) {
#else
if (!(port->modes & PARPORT_MODE_ECP) &&
!(port->modes & PARPORT_MODE_TRISTATE)) {
#endif
LOG("port is not ECP capable\n");
return -ENXIO;
}
cam = kmalloc(sizeof(struct pp_cam_entry), GFP_KERNEL);
if (cam == NULL) {
LOG("failed to allocate camera structure\n");
return -ENOMEM;
}
memset(cam,0,sizeof(struct pp_cam_entry));
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0))
pdev = parport_register_device(port, "cpia_pp", NULL, NULL,
cpia_pp_irq_handler, 0, cam);
#else
pdev = parport_register_device(port, "cpia_pp", NULL, NULL,
NULL, 0, cam);
#endif
if (!pdev) {
LOG("failed to parport_register_device\n");
kfree(cam);
return -ENXIO;
}
cam->pdev = pdev;
cam->port = port;
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0))
cam->state = CPIA_FORWARD;
cam->camstate = CPIA_PHASE_idle;
init_waitqueue(&cam->wq_stream);
#else
init_waitqueue_head(&cam->wq_stream);
#endif
cam->streaming = 0;
cam->stream_irq = 0;
#ifdef CONFIG_VIDEO_CPIA_PP_DMA
if (pdev->port->irq != PARPORT_IRQ_NONE &&
pdev->port->dma != PARPORT_DMA_NONE) {
if(request_dma(pdev->port->dma, "cpia_pp")) {
LOG("failed to register dma %d\n", pdev->port->dma);
parport_unregister_device(pdev);
kfree(cam);
return -ENXIO;
}
cam->dma_buf=kmalloc(DMA_BUFFER_SIZE, GFP_DMA);
if(cam->dma_buf == NULL) {
free_dma(cam->pdev->port->dma);
LOG("failed to allocate dma buffer, using PIO mode\n");
} else {
init_waitqueue(&cam->wq_dma);
printk(KERN_INFO " using DMA mode (irq %d, DMA %d)\n", pdev->port->irq, pdev->port->dma);
}
memset(cam->dma_buf, 0, DMA_BUFFER_SIZE);
} else {
printk(KERN_INFO " using PIO mode\n");
}
#endif
if((cpia = cpia_register_camera(&cpia_pp_ops, cam)) == NULL) {
LOG("failed to cpia_register_camera\n");
#ifdef CONFIG_VIDEO_CPIA_PP_DMA
if (cam->dma_buf) {
free_dma(cam->pdev->port->dma);
kfree(cam->dma_buf);
}
#endif
parport_unregister_device(pdev);
kfree(cam);
return -ENXIO;
}
ADD_TO_LIST(cam_list, cpia);
return 0;
}
static void cpia_pp_detach (struct parport *port)
{
struct cam_data *cpia;
for(cpia = cam_list; cpia != NULL; cpia = cpia->next) {
struct pp_cam_entry *cam = cpia->lowlevel_data;
if (cam && cam->port->number == port->number) {
REMOVE_FROM_LIST(cpia);
#ifdef CONFIG_VIDEO_CPIA_PP_DMA
if (cam->dma_buf) {
free_dma(cam->pdev->port->dma);
kfree(cam->dma_buf);
}
#endif
cpia_unregister_camera(cpia);
if(cam->open_count > 0) {
cpia_pp_close(cam);
}
parport_unregister_device(cam->pdev);
kfree(cam);
cpia->lowlevel_data = NULL;
break;
}
}
}
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0))
static void cpia_pp_attach (struct parport *port)
{
unsigned int i;
switch (parport_nr[0])
{
case PPCPIA_PARPORT_UNSPEC:
case PPCPIA_PARPORT_AUTO:
if (port->probe_info[0].class != PARPORT_CLASS_MEDIA ||
port->probe_info[0].cmdset == NULL ||
strncmp(port->probe_info[0].cmdset, "CPIA_1", 6) != 0)
return;
cpia_pp_register(port);
break;
default:
for (i = 0; i < PARPORT_MAX; ++i) {
if (port->number == parport_nr[i]) {
cpia_pp_register(port);
break;
}
}
break;
}
}
static struct parport_driver cpia_pp_driver = {
"cpia_pp",
cpia_pp_attach,
cpia_pp_detach,
NULL
};
#endif
int cpia_pp_init(void)
{
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0))
struct parport *port;
int i, count = 0;
#endif
printk(KERN_INFO "%s v%d.%d.%d\n",ABOUT,
CPIA_PP_MAJ_VER,CPIA_PP_MIN_VER,CPIA_PP_PATCH_VER);
if(parport_nr[0] == PPCPIA_PARPORT_OFF) {
printk(" disabled\n");
return 0;
}
#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0))
switch (parport_nr[0]) {
case PPCPIA_PARPORT_UNSPEC:
case PPCPIA_PARPORT_AUTO:
for (port = parport_enumerate(); port; port = port->next) {
#if defined(CONFIG_PNP_PARPORT) || \
(defined(MODULE) && defined(CONFIG_PNP_PARPORT_MODULE))
if(port->probe_info.model) {
if (port->probe_info.class != PARPORT_CLASS_MEDIA ||
port->probe_info.cmdset == NULL ||
strncmp(port->probe_info.cmdset, "CPIA_1", 6) != 0){
continue;
}
}
#endif
if (!cpia_pp_register(port)) {
++count;
}
}
break;
default:
for (i = 0; i < PARPORT_MAX; i++) {
for (port = parport_enumerate(); port;
port = port->next) {
if (port->number == parport_nr[i]) {
if (!cpia_pp_register(port)) {
count++;
}
break;
}
}
}
break;
}
printk(" %d camera(s) found\n", count);
if (count == 0) {
return -ENODEV;
}
#else /* kernel version >= 2.3.0 */
if (parport_register_driver (&cpia_pp_driver)) {
LOG ("unable to register with parport\n");
return -EIO;
}
#endif /* kernel version >= 2.3.0 */
return 0;
}
#ifdef MODULE
int init_module(void)
{
if (parport[0]) {
/* The user gave some parameters. Let's see what they were. */
if (!strncmp(parport[0], "auto", 4)) {
parport_nr[0] = PPCPIA_PARPORT_AUTO;
} else {
int n;
for (n = 0; n < PARPORT_MAX && parport[n]; n++) {
if (!strncmp(parport[n], "none", 4)) {
parport_nr[n] = PPCPIA_PARPORT_NONE;
} else {
char *ep;
unsigned long r = simple_strtoul(parport[n], &ep, 0);
if (ep != parport[n]) {
parport_nr[n] = r;
} else {
LOG("bad port specifier `%s'\n", parport[n]);
return -ENODEV;
}
}
}
}
}
#if defined(CONFIG_KMOD) && defined(CONFIG_PNP_PARPORT_MODULE)
if(parport_enumerate() && !parport_enumerate()->probe_info.model) {
request_module("parport_probe");
}
#endif
return cpia_pp_init();
}
void cleanup_module(void)
{
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0))
parport_unregister_driver (&cpia_pp_driver);
#else
while(cam_list != NULL) {
struct pp_cam_entry *cam = cam_list->lowlevel_data;
cpia_pp_detach(cam->port);
}
#endif
return;
}
#else /* !MODULE */
__initfunc(void cpia_pp_setup(char *str, int *ints))
{
if (!str) {
if (ints[0] == 0 || ints[1] == 0) {
/* disable driver on "cpia_pp=" or "cpia_pp=0" */
parport_nr[0] = PPCPIA_PARPORT_OFF;
}
} else if (!strncmp(str, "parport", 7)) {
int n = simple_strtoul(str + 7, NULL, 10);
if (parport_ptr < PARPORT_MAX) {
parport_nr[parport_ptr++] = n;
} else {
LOG("too many ports, %s ignored.\n", str);
}
} else if (!strcmp(str, "auto")) {
parport_nr[0] = PPCPIA_PARPORT_AUTO;
} else if (!strcmp(str, "none")) {
parport_nr[parport_ptr++] = PPCPIA_PARPORT_NONE;
}
}
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0))
__setup("cpia_pp=", cpia_pp_setup);
#endif
#endif /* !MODULE */
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