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8bab797c6e
This is a static checker fix. The "dev" variable is always NULL after
the while statement so we would be dereferencing a NULL pointer here.
Fixes: 819a3eba42 ('[PATCH] applicom: fix error handling')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
843 lines
24 KiB
C
843 lines
24 KiB
C
/* Derived from Applicom driver ac.c for SCO Unix */
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/* Ported by David Woodhouse, Axiom (Cambridge) Ltd. */
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/* dwmw2@infradead.org 30/8/98 */
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/* $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $ */
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/* This module is for Linux 2.1 and 2.2 series kernels. */
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/*****************************************************************************/
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/* J PAGET 18/02/94 passage V2.4.2 ioctl avec code 2 reset to les interrupt */
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/* ceci pour reseter correctement apres une sortie sauvage */
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/* J PAGET 02/05/94 passage V2.4.3 dans le traitement de d'interruption, */
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/* LoopCount n'etait pas initialise a 0. */
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/* F LAFORSE 04/07/95 version V2.6.0 lecture bidon apres acces a une carte */
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/* pour liberer le bus */
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/* J.PAGET 19/11/95 version V2.6.1 Nombre, addresse,irq n'est plus configure */
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/* et passe en argument a acinit, mais est scrute sur le bus pour s'adapter */
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/* au nombre de cartes presentes sur le bus. IOCL code 6 affichait V2.4.3 */
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/* F.LAFORSE 28/11/95 creation de fichiers acXX.o avec les differentes */
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/* addresses de base des cartes, IOCTL 6 plus complet */
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/* J.PAGET le 19/08/96 copie de la version V2.6 en V2.8.0 sans modification */
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/* de code autre que le texte V2.6.1 en V2.8.0 */
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/*****************************************************************************/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/errno.h>
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#include <linux/mutex.h>
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#include <linux/miscdevice.h>
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#include <linux/pci.h>
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#include <linux/wait.h>
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#include <linux/init.h>
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#include <linux/fs.h>
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#include <asm/io.h>
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#include <asm/uaccess.h>
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#include "applicom.h"
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/* NOTE: We use for loops with {write,read}b() instead of
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memcpy_{from,to}io throughout this driver. This is because
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the board doesn't correctly handle word accesses - only
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bytes.
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*/
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#undef DEBUG
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#define MAX_BOARD 8 /* maximum of pc board possible */
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#define MAX_ISA_BOARD 4
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#define LEN_RAM_IO 0x800
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#define AC_MINOR 157
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#ifndef PCI_VENDOR_ID_APPLICOM
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#define PCI_VENDOR_ID_APPLICOM 0x1389
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#define PCI_DEVICE_ID_APPLICOM_PCIGENERIC 0x0001
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#define PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN 0x0002
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#define PCI_DEVICE_ID_APPLICOM_PCI2000PFB 0x0003
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#endif
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static DEFINE_MUTEX(ac_mutex);
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static char *applicom_pci_devnames[] = {
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"PCI board",
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"PCI2000IBS / PCI2000CAN",
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"PCI2000PFB"
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};
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static struct pci_device_id applicom_pci_tbl[] = {
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{ PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCIGENERIC) },
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{ PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000IBS_CAN) },
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{ PCI_VDEVICE(APPLICOM, PCI_DEVICE_ID_APPLICOM_PCI2000PFB) },
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{ 0 }
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};
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MODULE_DEVICE_TABLE(pci, applicom_pci_tbl);
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MODULE_AUTHOR("David Woodhouse & Applicom International");
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MODULE_DESCRIPTION("Driver for Applicom Profibus card");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS_MISCDEV(AC_MINOR);
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MODULE_SUPPORTED_DEVICE("ac");
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static struct applicom_board {
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unsigned long PhysIO;
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void __iomem *RamIO;
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wait_queue_head_t FlagSleepSend;
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long irq;
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spinlock_t mutex;
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} apbs[MAX_BOARD];
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static unsigned int irq = 0; /* interrupt number IRQ */
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static unsigned long mem = 0; /* physical segment of board */
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module_param(irq, uint, 0);
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MODULE_PARM_DESC(irq, "IRQ of the Applicom board");
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module_param(mem, ulong, 0);
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MODULE_PARM_DESC(mem, "Shared Memory Address of Applicom board");
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static unsigned int numboards; /* number of installed boards */
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static volatile unsigned char Dummy;
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static DECLARE_WAIT_QUEUE_HEAD(FlagSleepRec);
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static unsigned int WriteErrorCount; /* number of write error */
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static unsigned int ReadErrorCount; /* number of read error */
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static unsigned int DeviceErrorCount; /* number of device error */
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static ssize_t ac_read (struct file *, char __user *, size_t, loff_t *);
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static ssize_t ac_write (struct file *, const char __user *, size_t, loff_t *);
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static long ac_ioctl(struct file *, unsigned int, unsigned long);
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static irqreturn_t ac_interrupt(int, void *);
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static const struct file_operations ac_fops = {
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.owner = THIS_MODULE,
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.llseek = no_llseek,
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.read = ac_read,
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.write = ac_write,
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.unlocked_ioctl = ac_ioctl,
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};
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static struct miscdevice ac_miscdev = {
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AC_MINOR,
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"ac",
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&ac_fops
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};
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static int dummy; /* dev_id for request_irq() */
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static int ac_register_board(unsigned long physloc, void __iomem *loc,
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unsigned char boardno)
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{
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volatile unsigned char byte_reset_it;
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if((readb(loc + CONF_END_TEST) != 0x00) ||
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(readb(loc + CONF_END_TEST + 1) != 0x55) ||
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(readb(loc + CONF_END_TEST + 2) != 0xAA) ||
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(readb(loc + CONF_END_TEST + 3) != 0xFF))
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return 0;
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if (!boardno)
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boardno = readb(loc + NUMCARD_OWNER_TO_PC);
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if (!boardno || boardno > MAX_BOARD) {
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printk(KERN_WARNING "Board #%d (at 0x%lx) is out of range (1 <= x <= %d).\n",
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boardno, physloc, MAX_BOARD);
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return 0;
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}
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if (apbs[boardno - 1].RamIO) {
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printk(KERN_WARNING "Board #%d (at 0x%lx) conflicts with previous board #%d (at 0x%lx)\n",
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boardno, physloc, boardno, apbs[boardno-1].PhysIO);
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return 0;
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}
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boardno--;
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apbs[boardno].PhysIO = physloc;
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apbs[boardno].RamIO = loc;
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init_waitqueue_head(&apbs[boardno].FlagSleepSend);
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spin_lock_init(&apbs[boardno].mutex);
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byte_reset_it = readb(loc + RAM_IT_TO_PC);
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numboards++;
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return boardno + 1;
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}
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static void __exit applicom_exit(void)
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{
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unsigned int i;
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misc_deregister(&ac_miscdev);
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for (i = 0; i < MAX_BOARD; i++) {
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if (!apbs[i].RamIO)
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continue;
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if (apbs[i].irq)
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free_irq(apbs[i].irq, &dummy);
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iounmap(apbs[i].RamIO);
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}
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}
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static int __init applicom_init(void)
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{
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int i, numisa = 0;
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struct pci_dev *dev = NULL;
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void __iomem *RamIO;
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int boardno, ret;
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printk(KERN_INFO "Applicom driver: $Id: ac.c,v 1.30 2000/03/22 16:03:57 dwmw2 Exp $\n");
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/* No mem and irq given - check for a PCI card */
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while ( (dev = pci_get_class(PCI_CLASS_OTHERS << 16, dev))) {
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if (!pci_match_id(applicom_pci_tbl, dev))
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continue;
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if (pci_enable_device(dev))
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return -EIO;
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RamIO = ioremap_nocache(pci_resource_start(dev, 0), LEN_RAM_IO);
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if (!RamIO) {
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printk(KERN_INFO "ac.o: Failed to ioremap PCI memory "
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"space at 0x%llx\n",
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(unsigned long long)pci_resource_start(dev, 0));
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pci_disable_device(dev);
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return -EIO;
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}
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printk(KERN_INFO "Applicom %s found at mem 0x%llx, irq %d\n",
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applicom_pci_devnames[dev->device-1],
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(unsigned long long)pci_resource_start(dev, 0),
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dev->irq);
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boardno = ac_register_board(pci_resource_start(dev, 0),
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RamIO, 0);
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if (!boardno) {
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printk(KERN_INFO "ac.o: PCI Applicom device doesn't have correct signature.\n");
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iounmap(RamIO);
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pci_disable_device(dev);
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continue;
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}
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if (request_irq(dev->irq, &ac_interrupt, IRQF_SHARED, "Applicom PCI", &dummy)) {
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printk(KERN_INFO "Could not allocate IRQ %d for PCI Applicom device.\n", dev->irq);
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iounmap(RamIO);
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pci_disable_device(dev);
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apbs[boardno - 1].RamIO = NULL;
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continue;
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}
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/* Enable interrupts. */
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writeb(0x40, apbs[boardno - 1].RamIO + RAM_IT_FROM_PC);
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apbs[boardno - 1].irq = dev->irq;
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}
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/* Finished with PCI cards. If none registered,
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* and there was no mem/irq specified, exit */
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if (!mem || !irq) {
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if (numboards)
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goto fin;
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else {
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printk(KERN_INFO "ac.o: No PCI boards found.\n");
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printk(KERN_INFO "ac.o: For an ISA board you must supply memory and irq parameters.\n");
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return -ENXIO;
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}
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}
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/* Now try the specified ISA cards */
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for (i = 0; i < MAX_ISA_BOARD; i++) {
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RamIO = ioremap_nocache(mem + (LEN_RAM_IO * i), LEN_RAM_IO);
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if (!RamIO) {
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printk(KERN_INFO "ac.o: Failed to ioremap the ISA card's memory space (slot #%d)\n", i + 1);
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continue;
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}
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if (!(boardno = ac_register_board((unsigned long)mem+ (LEN_RAM_IO*i),
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RamIO,i+1))) {
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iounmap(RamIO);
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continue;
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}
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printk(KERN_NOTICE "Applicom ISA card found at mem 0x%lx, irq %d\n", mem + (LEN_RAM_IO*i), irq);
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if (!numisa) {
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if (request_irq(irq, &ac_interrupt, IRQF_SHARED, "Applicom ISA", &dummy)) {
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printk(KERN_WARNING "Could not allocate IRQ %d for ISA Applicom device.\n", irq);
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iounmap(RamIO);
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apbs[boardno - 1].RamIO = NULL;
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}
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else
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apbs[boardno - 1].irq = irq;
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}
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else
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apbs[boardno - 1].irq = 0;
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numisa++;
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}
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if (!numisa)
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printk(KERN_WARNING "ac.o: No valid ISA Applicom boards found "
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"at mem 0x%lx\n", mem);
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fin:
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init_waitqueue_head(&FlagSleepRec);
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WriteErrorCount = 0;
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ReadErrorCount = 0;
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DeviceErrorCount = 0;
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if (numboards) {
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ret = misc_register(&ac_miscdev);
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if (ret) {
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printk(KERN_WARNING "ac.o: Unable to register misc device\n");
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goto out;
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}
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for (i = 0; i < MAX_BOARD; i++) {
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int serial;
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char boardname[(SERIAL_NUMBER - TYPE_CARD) + 1];
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if (!apbs[i].RamIO)
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continue;
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for (serial = 0; serial < SERIAL_NUMBER - TYPE_CARD; serial++)
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boardname[serial] = readb(apbs[i].RamIO + TYPE_CARD + serial);
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boardname[serial] = 0;
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printk(KERN_INFO "Applicom board %d: %s, PROM V%d.%d",
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i+1, boardname,
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(int)(readb(apbs[i].RamIO + VERS) >> 4),
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(int)(readb(apbs[i].RamIO + VERS) & 0xF));
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serial = (readb(apbs[i].RamIO + SERIAL_NUMBER) << 16) +
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(readb(apbs[i].RamIO + SERIAL_NUMBER + 1) << 8) +
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(readb(apbs[i].RamIO + SERIAL_NUMBER + 2) );
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if (serial != 0)
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printk(" S/N %d\n", serial);
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else
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printk("\n");
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}
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return 0;
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}
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else
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return -ENXIO;
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out:
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for (i = 0; i < MAX_BOARD; i++) {
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if (!apbs[i].RamIO)
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continue;
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if (apbs[i].irq)
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free_irq(apbs[i].irq, &dummy);
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iounmap(apbs[i].RamIO);
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}
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return ret;
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}
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module_init(applicom_init);
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module_exit(applicom_exit);
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static ssize_t ac_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos)
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{
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unsigned int NumCard; /* Board number 1 -> 8 */
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unsigned int IndexCard; /* Index board number 0 -> 7 */
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unsigned char TicCard; /* Board TIC to send */
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unsigned long flags; /* Current priority */
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struct st_ram_io st_loc;
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struct mailbox tmpmailbox;
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#ifdef DEBUG
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int c;
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#endif
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DECLARE_WAITQUEUE(wait, current);
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if (count != sizeof(struct st_ram_io) + sizeof(struct mailbox)) {
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static int warncount = 5;
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if (warncount) {
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printk(KERN_INFO "Hmmm. write() of Applicom card, length %zd != expected %zd\n",
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count, sizeof(struct st_ram_io) + sizeof(struct mailbox));
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warncount--;
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}
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return -EINVAL;
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}
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if(copy_from_user(&st_loc, buf, sizeof(struct st_ram_io)))
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return -EFAULT;
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if(copy_from_user(&tmpmailbox, &buf[sizeof(struct st_ram_io)],
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sizeof(struct mailbox)))
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return -EFAULT;
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NumCard = st_loc.num_card; /* board number to send */
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TicCard = st_loc.tic_des_from_pc; /* tic number to send */
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IndexCard = NumCard - 1;
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if((NumCard < 1) || (NumCard > MAX_BOARD) || !apbs[IndexCard].RamIO)
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return -EINVAL;
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#ifdef DEBUG
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printk("Write to applicom card #%d. struct st_ram_io follows:",
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IndexCard+1);
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for (c = 0; c < sizeof(struct st_ram_io);) {
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printk("\n%5.5X: %2.2X", c, ((unsigned char *) &st_loc)[c]);
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for (c++; c % 8 && c < sizeof(struct st_ram_io); c++) {
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printk(" %2.2X", ((unsigned char *) &st_loc)[c]);
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}
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}
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printk("\nstruct mailbox follows:");
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for (c = 0; c < sizeof(struct mailbox);) {
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printk("\n%5.5X: %2.2X", c, ((unsigned char *) &tmpmailbox)[c]);
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for (c++; c % 8 && c < sizeof(struct mailbox); c++) {
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printk(" %2.2X", ((unsigned char *) &tmpmailbox)[c]);
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}
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}
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printk("\n");
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#endif
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spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
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/* Test octet ready correct */
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if(readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) > 2) {
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Dummy = readb(apbs[IndexCard].RamIO + VERS);
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spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
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printk(KERN_WARNING "APPLICOM driver write error board %d, DataFromPcReady = %d\n",
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IndexCard,(int)readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY));
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DeviceErrorCount++;
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return -EIO;
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}
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/* Place ourselves on the wait queue */
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set_current_state(TASK_INTERRUPTIBLE);
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add_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
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/* Check whether the card is ready for us */
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while (readb(apbs[IndexCard].RamIO + DATA_FROM_PC_READY) != 0) {
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Dummy = readb(apbs[IndexCard].RamIO + VERS);
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/* It's busy. Sleep. */
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spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
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schedule();
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if (signal_pending(current)) {
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remove_wait_queue(&apbs[IndexCard].FlagSleepSend,
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&wait);
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return -EINTR;
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}
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spin_lock_irqsave(&apbs[IndexCard].mutex, flags);
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set_current_state(TASK_INTERRUPTIBLE);
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}
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/* We may not have actually slept */
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set_current_state(TASK_RUNNING);
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remove_wait_queue(&apbs[IndexCard].FlagSleepSend, &wait);
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writeb(1, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
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/* Which is best - lock down the pages with rawio and then
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copy directly, or use bounce buffers? For now we do the latter
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because it works with 2.2 still */
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{
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unsigned char *from = (unsigned char *) &tmpmailbox;
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void __iomem *to = apbs[IndexCard].RamIO + RAM_FROM_PC;
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int c;
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for (c = 0; c < sizeof(struct mailbox); c++)
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writeb(*(from++), to++);
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}
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writeb(0x20, apbs[IndexCard].RamIO + TIC_OWNER_FROM_PC);
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writeb(0xff, apbs[IndexCard].RamIO + NUMCARD_OWNER_FROM_PC);
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writeb(TicCard, apbs[IndexCard].RamIO + TIC_DES_FROM_PC);
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writeb(NumCard, apbs[IndexCard].RamIO + NUMCARD_DES_FROM_PC);
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writeb(2, apbs[IndexCard].RamIO + DATA_FROM_PC_READY);
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writeb(1, apbs[IndexCard].RamIO + RAM_IT_FROM_PC);
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Dummy = readb(apbs[IndexCard].RamIO + VERS);
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spin_unlock_irqrestore(&apbs[IndexCard].mutex, flags);
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return 0;
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}
|
|
|
|
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 */
|
|
memset(&st_loc, 0, sizeof(st_loc));
|
|
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 long ac_ioctl(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 = memdup_user(argp, sizeof(struct st_ram_io));
|
|
if (IS_ERR(adgl))
|
|
return PTR_ERR(adgl);
|
|
|
|
mutex_lock(&ac_mutex);
|
|
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);
|
|
mutex_unlock(&ac_mutex);
|
|
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[i].RamIO + VERS) >> 4),
|
|
(int)(readb(apbs[i].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);
|
|
mutex_unlock(&ac_mutex);
|
|
return 0;
|
|
}
|
|
|