bc20589bf1
The code scriblles over a local pointer whereas it appears to be trying to write to the memory at which that pointer points. Addresses http://bugzilla.kernel.org/show_bug.cgi?id=11397 Nobody we know can test this change. Reported-by: Zvonimir Rakamaric <zrakamar@cs.ubc.ca> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Jiri Slaby <jirislaby@gmail.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
841 lines
24 KiB
C
841 lines
24 KiB
C
/* Derived from Applicom driver ac.c for SCO Unix */
|
|
/* Ported by David Woodhouse, Axiom (Cambridge) Ltd. */
|
|
/* dwmw2@infradead.org 30/8/98 */
|
|
/* $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $ */
|
|
/* This module is for Linux 2.1 and 2.2 series kernels. */
|
|
/*****************************************************************************/
|
|
/* J PAGET 18/02/94 passage V2.4.2 ioctl avec code 2 reset to les interrupt */
|
|
/* ceci pour reseter correctement apres une sortie sauvage */
|
|
/* J PAGET 02/05/94 passage V2.4.3 dans le traitement de d'interruption, */
|
|
/* LoopCount n'etait pas initialise a 0. */
|
|
/* F LAFORSE 04/07/95 version V2.6.0 lecture bidon apres acces a une carte */
|
|
/* pour liberer le bus */
|
|
/* J.PAGET 19/11/95 version V2.6.1 Nombre, addresse,irq n'est plus configure */
|
|
/* et passe en argument a acinit, mais est scrute sur le bus pour s'adapter */
|
|
/* au nombre de cartes presentes sur le bus. IOCL code 6 affichait V2.4.3 */
|
|
/* F.LAFORSE 28/11/95 creation de fichiers acXX.o avec les differentes */
|
|
/* adresses de base des cartes, IOCTL 6 plus complet */
|
|
/* J.PAGET le 19/08/96 copie de la version V2.6 en V2.8.0 sans modification */
|
|
/* de code autre que le texte V2.6.1 en V2.8.0 */
|
|
/*****************************************************************************/
|
|
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/miscdevice.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/wait.h>
|
|
#include <linux/init.h>
|
|
#include <linux/fs.h>
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/uaccess.h>
|
|
|
|
#include "applicom.h"
|
|
|
|
|
|
/* NOTE: We use for loops with {write,read}b() instead of
|
|
memcpy_{from,to}io throughout this driver. This is because
|
|
the board doesn't correctly handle word accesses - only
|
|
bytes.
|
|
*/
|
|
|
|
|
|
#undef DEBUG
|
|
|
|
#define MAX_BOARD 8 /* maximum of pc board possible */
|
|
#define MAX_ISA_BOARD 4
|
|
#define LEN_RAM_IO 0x800
|
|
#define AC_MINOR 157
|
|
|
|
#ifndef PCI_VENDOR_ID_APPLICOM
|
|
#define PCI_VENDOR_ID_APPLICOM 0x1389
|
|
#define PCI_DEVICE_ID_APPLICOM_PCIGENERIC 0x0001
|
|
#define PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN 0x0002
|
|
#define PCI_DEVICE_ID_APPLICOM_PCI2000PFB 0x0003
|
|
#endif
|
|
|
|
static char *applicom_pci_devnames[] = {
|
|
"PCI board",
|
|
"PCI2000IBS / PCI2000CAN",
|
|
"PCI2000PFB"
|
|
};
|
|
|
|
static struct pci_device_id applicom_pci_tbl[] = {
|
|
{ PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCIGENERIC) },
|
|
{ PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN) },
|
|
{ PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000PFB) },
|
|
{ 0 }
|
|
};
|
|
MODULE_DEVICE_TABLE(pci, applicom_pci_tbl);
|
|
|
|
MODULE_AUTHOR("David Woodhouse & Applicom International");
|
|
MODULE_DESCRIPTION("Driver for Applicom Profibus card");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
MODULE_SUPPORTED_DEVICE("ac");
|
|
|
|
|
|
static struct applicom_board {
|
|
unsigned long PhysIO;
|
|
void __iomem *RamIO;
|
|
wait_queue_head_t FlagSleepSend;
|
|
long irq;
|
|
spinlock_t mutex;
|
|
} apbs[MAX_BOARD];
|
|
|
|
static unsigned int irq = 0; /* interrupt number IRQ */
|
|
static unsigned long mem = 0; /* physical segment of board */
|
|
|
|
module_param(irq, uint, 0);
|
|
MODULE_PARM_DESC(irq, "IRQ of the Applicom board");
|
|
module_param(mem, ulong, 0);
|
|
MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board");
|
|
|
|
static unsigned int numboards; /* number of installed boards */
|
|
static volatile unsigned char Dummy;
|
|
static DECLARE_WAIT_QUEUE_HEAD(FlagSleepRec);
|
|
static unsigned int WriteErrorCount; /* number of write error */
|
|
static unsigned int ReadErrorCount; /* number of read error */
|
|
static unsigned int DeviceErrorCount; /* number of device error */
|
|
|
|
static ssize_t ac_read (struct file *, char __user *, size_t, loff_t *);
|
|
static ssize_t ac_write (struct file *, const char __user *, size_t, loff_t *);
|
|
static int ac_ioctl(struct inode *, struct file *, unsigned int,
|
|
unsigned long);
|
|
static irqreturn_t ac_interrupt(int, void *);
|
|
|
|
static const struct file_operations ac_fops = {
|
|
.owner = THIS_MODULE,
|
|
.llseek = no_llseek,
|
|
.read = ac_read,
|
|
.write = ac_write,
|
|
.ioctl = ac_ioctl,
|
|
};
|
|
|
|
static struct miscdevice ac_miscdev = {
|
|
AC_MINOR,
|
|
"ac",
|
|
&ac_fops
|
|
};
|
|
|
|
static int dummy; /* dev_id for request_irq() */
|
|
|
|
static int ac_register_board(unsigned long physloc, void __iomem *loc,
|
|
unsigned char boardno)
|
|
{
|
|
volatile unsigned char byte_reset_it;
|
|
|
|
if((readb(loc + CONF_END_TEST) != 0x00) ||
|
|
(readb(loc + CONF_END_TEST + 1) != 0x55) ||
|
|
(readb(loc + CONF_END_TEST + 2) != 0xAA) ||
|
|
(readb(loc + CONF_END_TEST + 3) != 0xFF))
|
|
return 0;
|
|
|
|
if (!boardno)
|
|
boardno = readb(loc + NUMCARD_OWNER_TO_PC);
|
|
|
|
if (!boardno || boardno > MAX_BOARD) {
|
|
printk(KERN_WARNING "Board #%d (at 0x%lx) is out of range (1 <= x <= %d).\n",
|
|
boardno, physloc, MAX_BOARD);
|
|
return 0;
|
|
}
|
|
|
|
if (apbs[boardno - 1].RamIO) {
|
|
printk(KERN_WARNING "Board #%d (at 0x%lx) conflicts with previous board #%d (at 0x%lx)\n",
|
|
boardno, physloc, boardno, apbs[boardno-1].PhysIO);
|
|
return 0;
|
|
}
|
|
|
|
boardno--;
|
|
|
|
apbs[boardno].PhysIO = physloc;
|
|
apbs[boardno].RamIO = loc;
|
|
init_waitqueue_head(&apbs[boardno].FlagSleepSend);
|
|
spin_lock_init(&apbs[boardno].mutex);
|
|
byte_reset_it = readb(loc + RAM_IT_TO_PC);
|
|
|
|
numboards++;
|
|
return boardno + 1;
|
|
}
|
|
|
|
static void __exit applicom_exit(void)
|
|
{
|
|
unsigned int i;
|
|
|
|
misc_deregister(&ac_miscdev);
|
|
|
|
for (i = 0; i < MAX_BOARD; i++) {
|
|
|
|
if (!apbs[i].RamIO)
|
|
continue;
|
|
|
|
if (apbs[i].irq)
|
|
free_irq(apbs[i].irq, &dummy);
|
|
|
|
iounmap(apbs[i].RamIO);
|
|
}
|
|
}
|
|
|
|
static int __init applicom_init(void)
|
|
{
|
|
int i, numisa = 0;
|
|
struct pci_dev *dev = NULL;
|
|
void __iomem *RamIO;
|
|
int boardno, ret;
|
|
|
|
printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n");
|
|
|
|
/* No mem and irq given - check for a PCI card */
|
|
|
|
while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) {
|
|
|
|
if (!pci_match_id(applicom_pci_tbl, dev))
|
|
continue;
|
|
|
|
if (pci_enable_device(dev))
|
|
return -EIO;
|
|
|
|
RamIO = ioremap_nocache(pci_resource_start(dev, 0), LEN_RAM_IO);
|
|
|
|
if (!RamIO) {
|
|
printk(KERN_INFO "ac.o: Failed to ioremap PCI memory "
|
|
"space at 0x%llx\n",
|
|
(unsigned long long)pci_resource_start(dev, 0));
|
|
pci_disable_device(dev);
|
|
return -EIO;
|
|
}
|
|
|
|
printk(KERN_INFO "Applicom %s found at mem 0x%llx, irq %d\n",
|
|
applicom_pci_devnames[dev->device-1],
|
|
(unsigned long long)pci_resource_start(dev, 0),
|
|
dev->irq);
|
|
|
|
boardno = ac_register_board(pci_resource_start(dev, 0),
|
|
RamIO, 0);
|
|
if (!boardno) {
|
|
printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n");
|
|
iounmap(RamIO);
|
|
pci_disable_device(dev);
|
|
continue;
|
|
}
|
|
|
|
if (request_irq(dev->irq, &ac_interrupt, IRQF_SHARED, "Applicom PCI", &dummy)) {
|
|
printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq);
|
|
iounmap(RamIO);
|
|
pci_disable_device(dev);
|
|
apbs[boardno - 1].RamIO = NULL;
|
|
continue;
|
|
}
|
|
|
|
/* Enable interrupts. */
|
|
|
|
writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC);
|
|
|
|
apbs[boardno - 1].irq = dev->irq;
|
|
}
|
|
|
|
/* Finished with PCI cards. If none registered,
|
|
* and there was no mem/irq specified, exit */
|
|
|
|
if (!mem || !irq) {
|
|
if (numboards)
|
|
goto fin;
|
|
else {
|
|
printk(KERN_INFO "ac.o: No PCI boards found.\n");
|
|
printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n");
|
|
return -ENXIO;
|
|
}
|
|
}
|
|
|
|
/* Now try the specified ISA cards */
|
|
|
|
for (i = 0; i < MAX_ISA_BOARD; i++) {
|
|
RamIO = ioremap_nocache(mem + (LEN_RAM_IO * i), LEN_RAM_IO);
|
|
|
|
if (!RamIO) {
|
|
printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1);
|
|
continue;
|
|
}
|
|
|
|
if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i),
|
|
RamIO,i+1))) {
|
|
iounmap(RamIO);
|
|
continue;
|
|
}
|
|
|
|
printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq);
|
|
|
|
if (!numisa) {
|
|
if (request_irq(irq, &ac_interrupt, IRQF_SHARED, "Applicom ISA", &dummy)) {
|
|
printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq);
|
|
iounmap(RamIO);
|
|
apbs[boardno - 1].RamIO = NULL;
|
|
}
|
|
else
|
|
apbs[boardno - 1].irq = irq;
|
|
}
|
|
else
|
|
apbs[boardno - 1].irq = 0;
|
|
|
|
numisa++;
|
|
}
|
|
|
|
if (!numisa)
|
|
printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found "
|
|
"at mem 0x%lx\n", mem);
|
|
|
|
fin:
|
|
init_waitqueue_head(&FlagSleepRec);
|
|
|
|
WriteErrorCount = 0;
|
|
ReadErrorCount = 0;
|
|
DeviceErrorCount = 0;
|
|
|
|
if (numboards) {
|
|
ret = misc_register(&ac_miscdev);
|
|
if (ret) {
|
|
printk(KERN_WARNING "ac.o: Unable to register misc device\n");
|
|
goto out;
|
|
}
|
|
for (i = 0; i < MAX_BOARD; i++) {
|
|
int serial;
|
|
char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
|
|
|
|
if (!apbs[i].RamIO)
|
|
continue;
|
|
|
|
for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
|
|
boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
|
|
|
|
boardname[serial] = 0;
|
|
|
|
|
|
printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d",
|
|
i+1, boardname,
|
|
(int)(readb(apbs[i].RamIO + VERS) >> 4),
|
|
(int)(readb(apbs[i].RamIO + VERS) & 0xF));
|
|
|
|
serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
|
|
(readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
|
|
(readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
|
|
|
|
if (serial != 0)
|
|
printk(" S/N %d\n", serial);
|
|
else
|
|
printk("\n");
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
else
|
|
return -ENXIO;
|
|
|
|
out:
|
|
for (i = 0; i < MAX_BOARD; i++) {
|
|
if (!apbs[i].RamIO)
|
|
continue;
|
|
if (apbs[i].irq)
|
|
free_irq(apbs[i].irq, &dummy);
|
|
iounmap(apbs[i].RamIO);
|
|
}
|
|
pci_disable_device(dev);
|
|
return ret;
|
|
}
|
|
|
|
module_init(applicom_init);
|
|
module_exit(applicom_exit);
|
|
|
|
|
|
static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos)
|
|
{
|
|
unsigned int NumCard; /* Board number 1 -> 8 */
|
|
unsigned int IndexCard; /* Index board number 0 -> 7 */
|
|
unsigned char TicCard; /* Board TIC to send */
|
|
unsigned long flags; /* Current priority */
|
|
struct st_ram_io st_loc;
|
|
struct mailbox tmpmailbox;
|
|
#ifdef DEBUG
|
|
int c;
|
|
#endif
|
|
DECLARE_WAITQUEUE(wait, current);
|
|
|
|
if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
|
|
static int warncount = 5;
|
|
if (warncount) {
|
|
printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n",
|
|
count, sizeof(struct st_ram_io) + sizeof(struct mailbox));
|
|
warncount--;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io)))
|
|
return -EFAULT;
|
|
|
|
if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)],
|
|
sizeof(struct mailbox)))
|
|
return -EFAULT;
|
|
|
|
NumCard = st_loc.num_card; /* board number to send */
|
|
TicCard = st_loc.tic_des_from_pc; /* tic number to send */
|
|
IndexCard = NumCard - 1;
|
|
|
|
if((NumCard < 1) || (NumCard > MAX_BOARD) || !apbs[IndexCard].RamIO)
|
|
return -EINVAL;
|
|
|
|
#ifdef DEBUG
|
|
printk("Write to applicom card #%d. struct st_ram_io follows:",
|
|
IndexCard+1);
|
|
|
|
for (c = 0; c < sizeof(struct st_ram_io);) {
|
|
|
|
printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]);
|
|
|
|
for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
|
|
printk(" %2.2X", ((unsigned char *) &st_loc)[c]);
|
|
}
|
|
}
|
|
|
|
printk("\nstruct mailbox follows:");
|
|
|
|
for (c = 0; c < sizeof(struct mailbox);) {
|
|
printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]);
|
|
|
|
for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
|
|
printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]);
|
|
}
|
|
}
|
|
|
|
printk("\n");
|
|
#endif
|
|
|
|
spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
|
|
|
|
/* Test octet ready correct */
|
|
if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) {
|
|
Dummy = readb(apbs[IndexCard].RamIO + VERS);
|
|
spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
|
|
printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n",
|
|
IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY));
|
|
DeviceErrorCount++;
|
|
return -EIO;
|
|
}
|
|
|
|
/* Place ourselves on the wait queue */
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
|
|
|
|
/* Check whether the card is ready for us */
|
|
while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) {
|
|
Dummy = readb(apbs[IndexCard].RamIO + VERS);
|
|
/* It's busy. Sleep. */
|
|
|
|
spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
|
|
schedule();
|
|
if (signal_pending(current)) {
|
|
remove_wait_queue(&apbs[IndexCard].FlagSleepSend,
|
|
&wait);
|
|
return -EINTR;
|
|
}
|
|
spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
}
|
|
|
|
/* We may not have actually slept */
|
|
set_current_state(TASK_RUNNING);
|
|
remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
|
|
|
|
writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
|
|
|
|
/* Which is best - lock down the pages with rawio and then
|
|
copy directly, or use bounce buffers? For now we do the latter
|
|
because it works with 2.2 still */
|
|
{
|
|
unsigned char *from = (unsigned char *) &tmpmailbox;
|
|
void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC;
|
|
int c;
|
|
|
|
for (c = 0; c < sizeof(struct mailbox); c++)
|
|
writeb(*(from++), to++);
|
|
}
|
|
|
|
writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC);
|
|
writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC);
|
|
writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC);
|
|
writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
|
|
writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
|
|
writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
|
|
Dummy = readb(apbs[IndexCard].RamIO + VERS);
|
|
spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
|
|
return 0;
|
|
}
|
|
|
|
static int do_ac_read(int IndexCard, char __user *buf,
|
|
struct st_ram_io *st_loc, struct mailbox *mailbox)
|
|
{
|
|
void __iomem *from = apbs[IndexCard].RamIO + RAM_TO_PC;
|
|
unsigned char *to = (unsigned char *)mailbox;
|
|
#ifdef DEBUG
|
|
int c;
|
|
#endif
|
|
|
|
st_loc->tic_owner_to_pc = readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC);
|
|
st_loc->numcard_owner_to_pc = readb(apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
|
|
|
|
|
|
{
|
|
int c;
|
|
|
|
for (c = 0; c < sizeof(struct mailbox); c++)
|
|
*(to++) = readb(from++);
|
|
}
|
|
writeb(1, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
|
|
writeb(1, apbs[IndexCard].RamIO + TYP_ACK_FROM_PC);
|
|
writeb(IndexCard+1, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
|
|
writeb(readb(apbs[IndexCard].RamIO + TIC_OWNER_TO_PC),
|
|
apbs[IndexCard].RamIO + TIC_ACK_FROM_PC);
|
|
writeb(2, apbs[IndexCard].RamIO + ACK_FROM_PC_READY);
|
|
writeb(0, apbs[IndexCard].RamIO + DATA_TO_PC_READY);
|
|
writeb(2, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
|
|
Dummy = readb(apbs[IndexCard].RamIO + VERS);
|
|
|
|
#ifdef DEBUG
|
|
printk("Read from applicom card #%d. struct st_ram_io follows:", NumCard);
|
|
|
|
for (c = 0; c < sizeof(struct st_ram_io);) {
|
|
printk("\n%5.5X: %2.2X", c, ((unsigned char *)st_loc)[c]);
|
|
|
|
for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
|
|
printk(" %2.2X", ((unsigned char *)st_loc)[c]);
|
|
}
|
|
}
|
|
|
|
printk("\nstruct mailbox follows:");
|
|
|
|
for (c = 0; c < sizeof(struct mailbox);) {
|
|
printk("\n%5.5X: %2.2X", c, ((unsigned char *)mailbox)[c]);
|
|
|
|
for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
|
|
printk(" %2.2X", ((unsigned char *)mailbox)[c]);
|
|
}
|
|
}
|
|
printk("\n");
|
|
#endif
|
|
return (sizeof(struct st_ram_io) + sizeof(struct mailbox));
|
|
}
|
|
|
|
static ssize_t ac_read (struct file *filp, char __user *buf, size_t count, loff_t *ptr)
|
|
{
|
|
unsigned long flags;
|
|
unsigned int i;
|
|
unsigned char tmp;
|
|
int ret = 0;
|
|
DECLARE_WAITQUEUE(wait, current);
|
|
#ifdef DEBUG
|
|
int loopcount=0;
|
|
#endif
|
|
/* No need to ratelimit this. Only root can trigger it anyway */
|
|
if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
|
|
printk( KERN_WARNING "Hmmm. read() of Applicom card, length %zd != expected %zd\n",
|
|
count,sizeof(struct st_ram_io) + sizeof(struct mailbox));
|
|
return -EINVAL;
|
|
}
|
|
|
|
while(1) {
|
|
/* Stick ourself on the wait queue */
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
add_wait_queue(&FlagSleepRec, &wait);
|
|
|
|
/* Scan each board, looking for one which has a packet for us */
|
|
for (i=0; i < MAX_BOARD; i++) {
|
|
if (!apbs[i].RamIO)
|
|
continue;
|
|
spin_lock_irqsave(&apbs[i].mutex, flags);
|
|
|
|
tmp = readb(apbs[i].RamIO + DATA_TO_PC_READY);
|
|
|
|
if (tmp == 2) {
|
|
struct st_ram_io st_loc;
|
|
struct mailbox mailbox;
|
|
|
|
/* Got a packet for us */
|
|
ret = do_ac_read(i, buf, &st_loc, &mailbox);
|
|
spin_unlock_irqrestore(&apbs[i].mutex, flags);
|
|
set_current_state(TASK_RUNNING);
|
|
remove_wait_queue(&FlagSleepRec, &wait);
|
|
|
|
if (copy_to_user(buf, &st_loc, sizeof(st_loc)))
|
|
return -EFAULT;
|
|
if (copy_to_user(buf + sizeof(st_loc), &mailbox, sizeof(mailbox)))
|
|
return -EFAULT;
|
|
return tmp;
|
|
}
|
|
|
|
if (tmp > 2) {
|
|
/* Got an error */
|
|
Dummy = readb(apbs[i].RamIO + VERS);
|
|
|
|
spin_unlock_irqrestore(&apbs[i].mutex, flags);
|
|
set_current_state(TASK_RUNNING);
|
|
remove_wait_queue(&FlagSleepRec, &wait);
|
|
|
|
printk(KERN_WARNING "APPLICOM driver read error board %d, DataToPcReady = %d\n",
|
|
i,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
|
|
DeviceErrorCount++;
|
|
return -EIO;
|
|
}
|
|
|
|
/* Nothing for us. Try the next board */
|
|
Dummy = readb(apbs[i].RamIO + VERS);
|
|
spin_unlock_irqrestore(&apbs[i].mutex, flags);
|
|
|
|
} /* per board */
|
|
|
|
/* OK - No boards had data for us. Sleep now */
|
|
|
|
schedule();
|
|
remove_wait_queue(&FlagSleepRec, &wait);
|
|
|
|
if (signal_pending(current))
|
|
return -EINTR;
|
|
|
|
#ifdef DEBUG
|
|
if (loopcount++ > 2) {
|
|
printk(KERN_DEBUG "Looping in ac_read. loopcount %d\n", loopcount);
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
|
|
static irqreturn_t ac_interrupt(int vec, void *dev_instance)
|
|
{
|
|
unsigned int i;
|
|
unsigned int FlagInt;
|
|
unsigned int LoopCount;
|
|
int handled = 0;
|
|
|
|
// printk("Applicom interrupt on IRQ %d occurred\n", vec);
|
|
|
|
LoopCount = 0;
|
|
|
|
do {
|
|
FlagInt = 0;
|
|
for (i = 0; i < MAX_BOARD; i++) {
|
|
|
|
/* Skip if this board doesn't exist */
|
|
if (!apbs[i].RamIO)
|
|
continue;
|
|
|
|
spin_lock(&apbs[i].mutex);
|
|
|
|
/* Skip if this board doesn't want attention */
|
|
if(readb(apbs[i].RamIO + RAM_IT_TO_PC) == 0) {
|
|
spin_unlock(&apbs[i].mutex);
|
|
continue;
|
|
}
|
|
|
|
handled = 1;
|
|
FlagInt = 1;
|
|
writeb(0, apbs[i].RamIO + RAM_IT_TO_PC);
|
|
|
|
if (readb(apbs[i].RamIO + DATA_TO_PC_READY) > 2) {
|
|
printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataToPcReady = %d\n",
|
|
i+1,(int)readb(apbs[i].RamIO + DATA_TO_PC_READY));
|
|
DeviceErrorCount++;
|
|
}
|
|
|
|
if((readb(apbs[i].RamIO + DATA_FROM_PC_READY) > 2) &&
|
|
(readb(apbs[i].RamIO + DATA_FROM_PC_READY) != 6)) {
|
|
|
|
printk(KERN_WARNING "APPLICOM driver interrupt err board %d, DataFromPcReady = %d\n",
|
|
i+1,(int)readb(apbs[i].RamIO + DATA_FROM_PC_READY));
|
|
DeviceErrorCount++;
|
|
}
|
|
|
|
if (readb(apbs[i].RamIO + DATA_TO_PC_READY) == 2) { /* mailbox sent by the card ? */
|
|
if (waitqueue_active(&FlagSleepRec)) {
|
|
wake_up_interruptible(&FlagSleepRec);
|
|
}
|
|
}
|
|
|
|
if (readb(apbs[i].RamIO + DATA_FROM_PC_READY) == 0) { /* ram i/o free for write by pc ? */
|
|
if (waitqueue_active(&apbs[i].FlagSleepSend)) { /* process sleep during read ? */
|
|
wake_up_interruptible(&apbs[i].FlagSleepSend);
|
|
}
|
|
}
|
|
Dummy = readb(apbs[i].RamIO + VERS);
|
|
|
|
if(readb(apbs[i].RamIO + RAM_IT_TO_PC)) {
|
|
/* There's another int waiting on this card */
|
|
spin_unlock(&apbs[i].mutex);
|
|
i--;
|
|
} else {
|
|
spin_unlock(&apbs[i].mutex);
|
|
}
|
|
}
|
|
if (FlagInt)
|
|
LoopCount = 0;
|
|
else
|
|
LoopCount++;
|
|
} while(LoopCount < 2);
|
|
return IRQ_RETVAL(handled);
|
|
}
|
|
|
|
|
|
|
|
static int ac_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
|
|
|
|
{ /* @ ADG ou ATO selon le cas */
|
|
int i;
|
|
unsigned char IndexCard;
|
|
void __iomem *pmem;
|
|
int ret = 0;
|
|
volatile unsigned char byte_reset_it;
|
|
struct st_ram_io *adgl;
|
|
void __user *argp = (void __user *)arg;
|
|
|
|
/* In general, the device is only openable by root anyway, so we're not
|
|
particularly concerned that bogus ioctls can flood the console. */
|
|
|
|
adgl = kmalloc(sizeof(struct st_ram_io), GFP_KERNEL);
|
|
if (!adgl)
|
|
return -ENOMEM;
|
|
|
|
if (copy_from_user(adgl, argp, sizeof(struct st_ram_io))) {
|
|
kfree(adgl);
|
|
return -EFAULT;
|
|
}
|
|
|
|
IndexCard = adgl->num_card-1;
|
|
|
|
if(cmd != 6 && ((IndexCard >= MAX_BOARD) || !apbs[IndexCard].RamIO)) {
|
|
static int warncount = 10;
|
|
if (warncount) {
|
|
printk( KERN_WARNING "APPLICOM driver IOCTL, bad board number %d\n",(int)IndexCard+1);
|
|
warncount--;
|
|
}
|
|
kfree(adgl);
|
|
return -EINVAL;
|
|
}
|
|
|
|
switch (cmd) {
|
|
|
|
case 0:
|
|
pmem = apbs[IndexCard].RamIO;
|
|
for (i = 0; i < sizeof(struct st_ram_io); i++)
|
|
((unsigned char *)adgl)[i]=readb(pmem++);
|
|
if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
|
|
ret = -EFAULT;
|
|
break;
|
|
case 1:
|
|
pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
|
|
for (i = 0; i < 4; i++)
|
|
adgl->conf_end_test[i] = readb(pmem++);
|
|
for (i = 0; i < 2; i++)
|
|
adgl->error_code[i] = readb(pmem++);
|
|
for (i = 0; i < 4; i++)
|
|
adgl->parameter_error[i] = readb(pmem++);
|
|
pmem = apbs[IndexCard].RamIO + VERS;
|
|
adgl->vers = readb(pmem);
|
|
pmem = apbs[IndexCard].RamIO + TYPE_CARD;
|
|
for (i = 0; i < 20; i++)
|
|
adgl->reserv1[i] = readb(pmem++);
|
|
*(int *)&adgl->reserv1[20] =
|
|
(readb(apbs[IndexCard].RamIO + SERIAL_NUMBER) << 16) +
|
|
(readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 1) << 8) +
|
|
(readb(apbs[IndexCard].RamIO + SERIAL_NUMBER + 2) );
|
|
|
|
if (copy_to_user(argp, adgl, sizeof(struct st_ram_io)))
|
|
ret = -EFAULT;
|
|
break;
|
|
case 2:
|
|
pmem = apbs[IndexCard].RamIO + CONF_END_TEST;
|
|
for (i = 0; i < 10; i++)
|
|
writeb(0xff, pmem++);
|
|
writeb(adgl->data_from_pc_ready,
|
|
apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
|
|
|
|
writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
|
|
|
|
for (i = 0; i < MAX_BOARD; i++) {
|
|
if (apbs[i].RamIO) {
|
|
byte_reset_it = readb(apbs[i].RamIO + RAM_IT_TO_PC);
|
|
}
|
|
}
|
|
break;
|
|
case 3:
|
|
pmem = apbs[IndexCard].RamIO + TIC_DES_FROM_PC;
|
|
writeb(adgl->tic_des_from_pc, pmem);
|
|
break;
|
|
case 4:
|
|
pmem = apbs[IndexCard].RamIO + TIC_OWNER_TO_PC;
|
|
adgl->tic_owner_to_pc = readb(pmem++);
|
|
adgl->numcard_owner_to_pc = readb(pmem);
|
|
if (copy_to_user(argp, adgl,sizeof(struct st_ram_io)))
|
|
ret = -EFAULT;
|
|
break;
|
|
case 5:
|
|
writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_OWNER_TO_PC);
|
|
writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
|
|
writeb(adgl->num_card, apbs[IndexCard].RamIO + NUMCARD_ACK_FROM_PC);
|
|
writeb(4, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
|
|
writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
|
|
break;
|
|
case 6:
|
|
printk(KERN_INFO "APPLICOM driver release .... V2.8.0 ($Revision: 1.30 $)\n");
|
|
printk(KERN_INFO "Number of installed boards . %d\n", (int) numboards);
|
|
printk(KERN_INFO "Segment of board ........... %X\n", (int) mem);
|
|
printk(KERN_INFO "Interrupt IRQ number ....... %d\n", (int) irq);
|
|
for (i = 0; i < MAX_BOARD; i++) {
|
|
int serial;
|
|
char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
|
|
|
|
if (!apbs[i].RamIO)
|
|
continue;
|
|
|
|
for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
|
|
boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
|
|
boardname[serial] = 0;
|
|
|
|
printk(KERN_INFO "Prom version board %d ....... V%d.%d %s",
|
|
i+1,
|
|
(int)(readb(apbs[IndexCard].RamIO + VERS) >> 4),
|
|
(int)(readb(apbs[IndexCard].RamIO + VERS) & 0xF),
|
|
boardname);
|
|
|
|
|
|
serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
|
|
(readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
|
|
(readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
|
|
|
|
if (serial != 0)
|
|
printk(" S/N %d\n", serial);
|
|
else
|
|
printk("\n");
|
|
}
|
|
if (DeviceErrorCount != 0)
|
|
printk(KERN_INFO "DeviceErrorCount ........... %d\n", DeviceErrorCount);
|
|
if (ReadErrorCount != 0)
|
|
printk(KERN_INFO "ReadErrorCount ............. %d\n", ReadErrorCount);
|
|
if (WriteErrorCount != 0)
|
|
printk(KERN_INFO "WriteErrorCount ............ %d\n", WriteErrorCount);
|
|
if (waitqueue_active(&FlagSleepRec))
|
|
printk(KERN_INFO "Process in read pending\n");
|
|
for (i = 0; i < MAX_BOARD; i++) {
|
|
if (apbs[i].RamIO && waitqueue_active(&apbs[i].FlagSleepSend))
|
|
printk(KERN_INFO "Process in write pending board %d\n",i+1);
|
|
}
|
|
break;
|
|
default:
|
|
ret = -ENOTTY;
|
|
break;
|
|
}
|
|
Dummy = readb(apbs[IndexCard].RamIO + VERS);
|
|
kfree(adgl);
|
|
return 0;
|
|
}
|
|
|