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1c37ab5e51
When the kernel is running in secure boot mode, we lock down the kernel to prevent userspace from modifying the running kernel image. Whilst this includes prohibiting access to things like /dev/mem, it must also prevent access by means of configuring driver modules in such a way as to cause a device to access or modify the kernel image. To this end, annotate module_param* statements that refer to hardware configuration and indicate for future reference what type of parameter they specify. The parameter parser in the core sees this information and can skip such parameters with an error message if the kernel is locked down. The module initialisation then runs as normal, but just sees whatever the default values for those parameters is. Note that we do still need to do the module initialisation because some drivers have viable defaults set in case parameters aren't specified and some drivers support automatic configuration (e.g. PNP or PCI) in addition to manually coded parameters. This patch annotates drivers in drivers/char/. Suggested-by: Alan Cox <gnomes@lxorguk.ukuu.org.uk> Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> cc: Arnd Bergmann <arnd@arndb.de>
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/signal.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 <linux/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_hw(irq, uint, irq, 0);
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MODULE_PARM_DESC(irq, "IRQ of the Applicom board");
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module_param_hw(mem, ulong, iomem, 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);
|
|
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 */
|
|
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;
|
|
}
|
|
|