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V4L/DVB (13705): [Mantis] FIX: Do not return IRQ_HANDLED in the unlikely case
Signed-off-by: Manu Abraham <manu@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Manu Abraham
Mauro Carvalho Chehab
parent
071e3060a5
commit
bd1fcac014
328
drivers/media/dvb/mantis/mantis_pci.c
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328
drivers/media/dvb/mantis/mantis_pci.c
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@ -0,0 +1,328 @@
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/*
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Mantis PCI bridge driver
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Copyright (C) 2005, 2006 Manu Abraham (abraham.manu@gmail.com)
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <asm/io.h>
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#include <asm/pgtable.h>
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#include <asm/page.h>
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#include <linux/kmod.h>
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#include <linux/vmalloc.h>
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#include <linux/init.h>
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#include <linux/device.h>
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#include "mantis_common.h"
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#include "mantis_core.h"
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#include <asm/irq.h>
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#include <linux/signal.h>
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#include <linux/sched.h>
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#include <linux/interrupt.h>
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unsigned int verbose = 1;
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module_param(verbose, int, 0644);
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MODULE_PARM_DESC(verbose, "verbose startup messages, default is 1 (yes)");
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unsigned int devs;
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#define PCI_VENDOR_ID_MANTIS 0x1822
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#define PCI_DEVICE_ID_MANTIS_R11 0x4e35
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#define DRIVER_NAME "Mantis"
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static struct pci_device_id mantis_pci_table[] = {
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{ PCI_DEVICE(PCI_VENDOR_ID_MANTIS, PCI_DEVICE_ID_MANTIS_R11) },
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{ 0 },
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};
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MODULE_DEVICE_TABLE(pci, mantis_pci_table);
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static irqreturn_t mantis_pci_irq(int irq, void *dev_id)
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{
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int i = 0, interrupts = 0;
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u32 stat = 0, mask = 0, lstat = 0, mstat = 0;
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struct mantis_pci *mantis;
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mantis = (struct mantis_pci *) dev_id;
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if (unlikely(mantis == NULL)) {
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dprintk(verbose, MANTIS_ERROR, 1, "Mantis == NULL");
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return IRQ_NONE;
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}
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stat = mmread(MANTIS_INT_STAT);
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mask = mmread(MANTIS_INT_MASK);
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mstat = lstat = stat & ~MANTIS_INT_RISCSTAT;
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if (!(stat & mask)) {
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dprintk(verbose, MANTIS_DEBUG, 1, "Not ours !");
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return IRQ_NONE;
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}
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mmwrite(lstat, MANTIS_INT_STAT);
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interrupts = hweight32(stat);
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dprintk(verbose, MANTIS_DEBUG, 0, "=== Interrupts[%04x/%04x]=%d [", stat, mask, interrupts);
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while (lstat) {
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if (lstat & MANTIS_INT_RISCEN) {
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dprintk(verbose, MANTIS_DEBUG, 0, "* DMA enabl *");
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lstat &= ~MANTIS_INT_RISCEN;
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} else if (lstat & MANTIS_INT_I2CRACK) {
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dprintk(verbose, MANTIS_DEBUG, 0, "* I2C R-ACK *");
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mantis->mantis_int_stat = stat;
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mantis->mantis_int_mask = mask;
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wake_up(&mantis->i2c_wq);
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lstat &= ~MANTIS_INT_I2CRACK;
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} else if (lstat & MANTIS_INT_PCMCIA7) {
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dprintk(verbose, MANTIS_DEBUG, 0, "* PCMCIA-07 *");
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lstat &= ~MANTIS_INT_PCMCIA7;
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} else if (lstat & MANTIS_INT_PCMCIA6) {
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dprintk(verbose, MANTIS_DEBUG, 0, "* PCMCIA-06 *");
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lstat &= ~MANTIS_INT_PCMCIA6;
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} else if (lstat & MANTIS_INT_PCMCIA5) {
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dprintk(verbose, MANTIS_DEBUG, 0, "* PCMCIA-05 *");
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lstat &= ~MANTIS_INT_PCMCIA5;
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} else if (lstat & MANTIS_INT_PCMCIA4) {
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dprintk(verbose, MANTIS_DEBUG, 0, "* PCMCIA-04 *");
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lstat &= ~MANTIS_INT_PCMCIA4;
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} else if (lstat & MANTIS_INT_PCMCIA3) {
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dprintk(verbose, MANTIS_DEBUG, 0, "* PCMCIA-03 *");
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lstat &= ~MANTIS_INT_PCMCIA3;
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} else if (lstat & MANTIS_INT_PCMCIA2) {
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dprintk(verbose, MANTIS_DEBUG, 0, "* PCMCIA-02 *");
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lstat &= ~MANTIS_INT_PCMCIA2;
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} else if (lstat & MANTIS_INT_PCMCIA1) {
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dprintk(verbose, MANTIS_DEBUG, 0, "* PCMCIA-01 *");
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lstat &= ~MANTIS_INT_PCMCIA1;
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} else if (lstat & MANTIS_INT_PCMCIA0) {
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dprintk(verbose, MANTIS_DEBUG, 0, "* PCMCIA-00 *");
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lstat &= ~MANTIS_INT_PCMCIA0;
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} else if (lstat & MANTIS_INT_IRQ0) {
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dprintk(verbose, MANTIS_DEBUG, 0, "* INT IRQ-0 *");
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lstat &= ~MANTIS_INT_IRQ0;
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} else if (lstat & MANTIS_INT_IRQ1) {
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dprintk(verbose, MANTIS_DEBUG, 0, "* INT IRQ-1 *");
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lstat &= ~MANTIS_INT_IRQ1;
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} else if (lstat & MANTIS_INT_OCERR) {
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dprintk(verbose, MANTIS_DEBUG, 0, "* INT OCERR *");
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lstat &= ~MANTIS_INT_OCERR;
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} else if (lstat & MANTIS_INT_PABORT) {
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dprintk(verbose, MANTIS_DEBUG, 0, "* INT PABRT *");
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lstat &= ~MANTIS_INT_PABORT;
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} else if (lstat & MANTIS_INT_RIPERR) {
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dprintk(verbose, MANTIS_DEBUG, 0, "* INT RIPRR *");
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lstat &= ~MANTIS_INT_RIPERR;
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} else if (lstat & MANTIS_INT_PPERR) {
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dprintk(verbose, MANTIS_DEBUG, 0, "* INT PPERR *");
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lstat &= ~MANTIS_INT_PPERR;
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} else if (lstat & MANTIS_INT_FTRGT) {
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dprintk(verbose, MANTIS_DEBUG, 0, "* INT FTRGT *");
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lstat &= ~MANTIS_INT_FTRGT;
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} else if (lstat & MANTIS_INT_RISCI) {
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dprintk(verbose, MANTIS_DEBUG, 0, "* INT RISCI *");
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mantis->finished_block = (stat & MANTIS_INT_RISCSTAT) >> 28;
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tasklet_schedule(&mantis->tasklet);
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lstat &= ~MANTIS_INT_RISCI;
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} else if (lstat & MANTIS_INT_I2CDONE) {
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dprintk(verbose, MANTIS_DEBUG, 0, "* I2C DONE *");
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mantis->mantis_int_stat = stat;
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mantis->mantis_int_mask = mask;
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lstat &= ~MANTIS_INT_I2CDONE;
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} else {
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dprintk(verbose, MANTIS_DEBUG, 0,
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"* Unknown [%04x/%04x] *", stat, mask);
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break;
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}
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i++;
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if (i > interrupts) {
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dprintk(verbose, MANTIS_ERROR, 1, "going Loopy ! -- BREAK --");
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break;
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}
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}
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dprintk(verbose, MANTIS_DEBUG, 0, "] ===\n");
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return IRQ_HANDLED;
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}
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static int __devinit mantis_pci_probe(struct pci_dev *pdev,
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const struct pci_device_id *mantis_pci_table)
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{
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u8 revision, latency;
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struct mantis_pci *mantis;
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int ret = 0;
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devs++;
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mantis = kmalloc(sizeof (struct mantis_pci), GFP_KERNEL);
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if (mantis == NULL) {
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printk("%s: Out of memory\n", __func__);
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ret = -ENOMEM;
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goto err;
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}
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memset(mantis, 0, sizeof (struct mantis_pci));
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mantis->num = devs;
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if (pci_enable_device(pdev)) {
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dprintk(verbose, MANTIS_ERROR, 1, "Mantis PCI enable failed");
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ret = -ENODEV;
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goto err;
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}
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mantis->mantis_addr = pci_resource_start(pdev, 0);
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if (!request_mem_region(pci_resource_start(pdev, 0),
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pci_resource_len(pdev, 0), DRIVER_NAME)) {
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ret = -ENODEV;
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goto err0;
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}
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if ((mantis->mantis_mmio = ioremap(mantis->mantis_addr, 0x1000)) == NULL) {
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dprintk(verbose, MANTIS_ERROR, 1, "IO remap failed");
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ret = -ENODEV;
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goto err1;
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}
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// Clear and disable all interrupts at startup
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// to avoid lockup situations
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mmwrite(0x00, MANTIS_INT_MASK);
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if (request_irq(pdev->irq, mantis_pci_irq, IRQF_SHARED | IRQF_DISABLED,
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DRIVER_NAME, mantis) < 0) {
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dprintk(verbose, MANTIS_ERROR, 1, "Mantis IRQ reg failed");
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ret = -ENODEV;
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goto err2;
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}
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pci_set_master(pdev);
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pci_set_drvdata(pdev, mantis);
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pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &latency);
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pci_read_config_byte(pdev, PCI_CLASS_REVISION, &revision);
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mantis->latency = latency;
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mantis->revision = revision;
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mantis->pdev = pdev;
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init_waitqueue_head(&mantis->i2c_wq);
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// CAM bypass
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//mmwrite(mmread(MANTIS_INT_MASK) | MANTIS_INT_IRQ1, MANTIS_INT_MASK);
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dprintk(verbose, MANTIS_INFO, 1, "gpif status: %04x irqcfg: %04x", mmread(0x9c), mmread(0x98));
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if ((mmread(0x9c) & 0x200) != 0) { //CAM inserted
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msleep_interruptible(1);
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if ((mmread(0x9c) & 0x200) != 0)
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mmwrite(((mmread(0x98) | 0x01) & ~0x02), 0x98);
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else
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mmwrite(((mmread(0x98) | 0x02) & ~0x01), 0x98);
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} else {
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mmwrite(((mmread(0x98) | 0x02) & ~0x01), 0x98);
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}
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mantis_set_direction(mantis, 0);
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// default latency if none specified
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if (!latency)
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pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 32);
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dprintk(verbose, MANTIS_ERROR, 0, "Mantis Rev %d, ",
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mantis->revision);
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dprintk(verbose, MANTIS_ERROR, 0,
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"irq: %d, latency: %d\n memory: 0x%lx, mmio: 0x%p\n",
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pdev->irq, mantis->latency,
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mantis->mantis_addr, mantis->mantis_mmio);
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// No more PCI specific stuff !
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if (mantis_core_init(mantis) < 0) {
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dprintk(verbose, MANTIS_ERROR, 1, "Mantis core init failed");
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ret = -ENODEV;
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goto err2;
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}
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return 0;
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// Error conditions ..
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err2:
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dprintk(verbose, MANTIS_DEBUG, 1, "Err: IO Unmap");
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if (mantis->mantis_mmio)
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iounmap(mantis->mantis_mmio);
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err1:
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dprintk(verbose, MANTIS_DEBUG, 1, "Err: Release regions");
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release_mem_region(pci_resource_start(pdev, 0),
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pci_resource_len(pdev, 0));
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pci_disable_device(pdev);
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err0:
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dprintk(verbose, MANTIS_DEBUG, 1, "Err: Free");
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kfree(mantis);
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err:
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dprintk(verbose, MANTIS_DEBUG, 1, "Err:");
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return ret;
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}
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static void __devexit mantis_pci_remove(struct pci_dev *pdev)
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{
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struct mantis_pci *mantis = pci_get_drvdata(pdev);
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if (mantis == NULL) {
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dprintk(verbose, MANTIS_ERROR, 1, "Aeio, Mantis NULL ptr");
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return;
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}
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mantis_core_exit(mantis);
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dprintk(verbose, MANTIS_ERROR, 1, "Removing -->Mantis irq: %d, latency: %d\n memory: 0x%lx, mmio: 0x%p",
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pdev->irq, mantis->latency, mantis->mantis_addr,
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mantis->mantis_mmio);
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free_irq(pdev->irq, mantis);
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pci_release_regions(pdev);
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if (mantis_dma_exit(mantis) < 0)
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dprintk(verbose, MANTIS_ERROR, 1, "DMA exit failed");
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pci_set_drvdata(pdev, NULL);
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pci_disable_device(pdev);
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kfree(mantis);
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}
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static struct pci_driver mantis_pci_driver = {
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.name = DRIVER_NAME,
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.id_table = mantis_pci_table,
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.probe = mantis_pci_probe,
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.remove = mantis_pci_remove,
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};
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static int __devinit mantis_pci_init(void)
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{
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return pci_register_driver(&mantis_pci_driver);
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}
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static void __devexit mantis_pci_exit(void)
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{
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pci_unregister_driver(&mantis_pci_driver);
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}
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module_init(mantis_pci_init);
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module_exit(mantis_pci_exit);
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MODULE_DESCRIPTION("Mantis PCI DTV bridge driver");
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MODULE_AUTHOR("Manu Abraham");
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MODULE_LICENSE("GPL");
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