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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 2009-12-02 22:06:15 -03:00 committed by Mauro Carvalho Chehab
parent 071e3060a5
commit bd1fcac014
1 changed files with 328 additions and 0 deletions
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328
drivers/media/dvb/mantis/mantis_pci.c Normal file
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/*
Mantis PCI bridge driver
Copyright (C) 2005, 2006 Manu Abraham (abraham.manu@gmail.com)
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <linux/kmod.h>
#include <linux/vmalloc.h>
#include <linux/init.h>
#include <linux/device.h>
#include "mantis_common.h"
#include "mantis_core.h"
#include <asm/irq.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
unsigned int verbose = 1;
module_param(verbose, int, 0644);
MODULE_PARM_DESC(verbose, "verbose startup messages, default is 1 (yes)");
unsigned int devs;
#define PCI_VENDOR_ID_MANTIS 0x1822
#define PCI_DEVICE_ID_MANTIS_R11 0x4e35
#define DRIVER_NAME "Mantis"
static struct pci_device_id mantis_pci_table[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_MANTIS, PCI_DEVICE_ID_MANTIS_R11) },
{ 0 },
};
MODULE_DEVICE_TABLE(pci, mantis_pci_table);
static irqreturn_t mantis_pci_irq(int irq, void *dev_id)
{
int i = 0, interrupts = 0;
u32 stat = 0, mask = 0, lstat = 0, mstat = 0;
struct mantis_pci *mantis;
mantis = (struct mantis_pci *) dev_id;
if (unlikely(mantis == NULL)) {
dprintk(verbose, MANTIS_ERROR, 1, "Mantis == NULL");
return IRQ_NONE;
}
stat = mmread(MANTIS_INT_STAT);
mask = mmread(MANTIS_INT_MASK);
mstat = lstat = stat & ~MANTIS_INT_RISCSTAT;
if (!(stat & mask)) {
dprintk(verbose, MANTIS_DEBUG, 1, "Not ours !");
return IRQ_NONE;
}
mmwrite(lstat, MANTIS_INT_STAT);
interrupts = hweight32(stat);
dprintk(verbose, MANTIS_DEBUG, 0, "=== Interrupts[%04x/%04x]=%d [", stat, mask, interrupts);
while (lstat) {
if (lstat & MANTIS_INT_RISCEN) {
dprintk(verbose, MANTIS_DEBUG, 0, "* DMA enabl *");
lstat &= ~MANTIS_INT_RISCEN;
} else if (lstat & MANTIS_INT_I2CRACK) {
dprintk(verbose, MANTIS_DEBUG, 0, "* I2C R-ACK *");
mantis->mantis_int_stat = stat;
mantis->mantis_int_mask = mask;
wake_up(&mantis->i2c_wq);
lstat &= ~MANTIS_INT_I2CRACK;
} else if (lstat & MANTIS_INT_PCMCIA7) {
dprintk(verbose, MANTIS_DEBUG, 0, "* PCMCIA-07 *");
lstat &= ~MANTIS_INT_PCMCIA7;
} else if (lstat & MANTIS_INT_PCMCIA6) {
dprintk(verbose, MANTIS_DEBUG, 0, "* PCMCIA-06 *");
lstat &= ~MANTIS_INT_PCMCIA6;
} else if (lstat & MANTIS_INT_PCMCIA5) {
dprintk(verbose, MANTIS_DEBUG, 0, "* PCMCIA-05 *");
lstat &= ~MANTIS_INT_PCMCIA5;
} else if (lstat & MANTIS_INT_PCMCIA4) {
dprintk(verbose, MANTIS_DEBUG, 0, "* PCMCIA-04 *");
lstat &= ~MANTIS_INT_PCMCIA4;
} else if (lstat & MANTIS_INT_PCMCIA3) {
dprintk(verbose, MANTIS_DEBUG, 0, "* PCMCIA-03 *");
lstat &= ~MANTIS_INT_PCMCIA3;
} else if (lstat & MANTIS_INT_PCMCIA2) {
dprintk(verbose, MANTIS_DEBUG, 0, "* PCMCIA-02 *");
lstat &= ~MANTIS_INT_PCMCIA2;
} else if (lstat & MANTIS_INT_PCMCIA1) {
dprintk(verbose, MANTIS_DEBUG, 0, "* PCMCIA-01 *");
lstat &= ~MANTIS_INT_PCMCIA1;
} else if (lstat & MANTIS_INT_PCMCIA0) {
dprintk(verbose, MANTIS_DEBUG, 0, "* PCMCIA-00 *");
lstat &= ~MANTIS_INT_PCMCIA0;
} else if (lstat & MANTIS_INT_IRQ0) {
dprintk(verbose, MANTIS_DEBUG, 0, "* INT IRQ-0 *");
lstat &= ~MANTIS_INT_IRQ0;
} else if (lstat & MANTIS_INT_IRQ1) {
dprintk(verbose, MANTIS_DEBUG, 0, "* INT IRQ-1 *");
lstat &= ~MANTIS_INT_IRQ1;
} else if (lstat & MANTIS_INT_OCERR) {
dprintk(verbose, MANTIS_DEBUG, 0, "* INT OCERR *");
lstat &= ~MANTIS_INT_OCERR;
} else if (lstat & MANTIS_INT_PABORT) {
dprintk(verbose, MANTIS_DEBUG, 0, "* INT PABRT *");
lstat &= ~MANTIS_INT_PABORT;
} else if (lstat & MANTIS_INT_RIPERR) {
dprintk(verbose, MANTIS_DEBUG, 0, "* INT RIPRR *");
lstat &= ~MANTIS_INT_RIPERR;
} else if (lstat & MANTIS_INT_PPERR) {
dprintk(verbose, MANTIS_DEBUG, 0, "* INT PPERR *");
lstat &= ~MANTIS_INT_PPERR;
} else if (lstat & MANTIS_INT_FTRGT) {
dprintk(verbose, MANTIS_DEBUG, 0, "* INT FTRGT *");
lstat &= ~MANTIS_INT_FTRGT;
} else if (lstat & MANTIS_INT_RISCI) {
dprintk(verbose, MANTIS_DEBUG, 0, "* INT RISCI *");
mantis->finished_block = (stat & MANTIS_INT_RISCSTAT) >> 28;
tasklet_schedule(&mantis->tasklet);
lstat &= ~MANTIS_INT_RISCI;
} else if (lstat & MANTIS_INT_I2CDONE) {
dprintk(verbose, MANTIS_DEBUG, 0, "* I2C DONE *");
mantis->mantis_int_stat = stat;
mantis->mantis_int_mask = mask;
lstat &= ~MANTIS_INT_I2CDONE;
} else {
dprintk(verbose, MANTIS_DEBUG, 0,
"* Unknown [%04x/%04x] *", stat, mask);
break;
}
i++;
if (i > interrupts) {
dprintk(verbose, MANTIS_ERROR, 1, "going Loopy ! -- BREAK --");
break;
}
}
dprintk(verbose, MANTIS_DEBUG, 0, "] ===\n");
return IRQ_HANDLED;
}
static int __devinit mantis_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *mantis_pci_table)
{
u8 revision, latency;
struct mantis_pci *mantis;
int ret = 0;
devs++;
mantis = kmalloc(sizeof (struct mantis_pci), GFP_KERNEL);
if (mantis == NULL) {
printk("%s: Out of memory\n", __func__);
ret = -ENOMEM;
goto err;
}
memset(mantis, 0, sizeof (struct mantis_pci));
mantis->num = devs;
if (pci_enable_device(pdev)) {
dprintk(verbose, MANTIS_ERROR, 1, "Mantis PCI enable failed");
ret = -ENODEV;
goto err;
}
mantis->mantis_addr = pci_resource_start(pdev, 0);
if (!request_mem_region(pci_resource_start(pdev, 0),
pci_resource_len(pdev, 0), DRIVER_NAME)) {
ret = -ENODEV;
goto err0;
}
if ((mantis->mantis_mmio = ioremap(mantis->mantis_addr, 0x1000)) == NULL) {
dprintk(verbose, MANTIS_ERROR, 1, "IO remap failed");
ret = -ENODEV;
goto err1;
}
// Clear and disable all interrupts at startup
// to avoid lockup situations
mmwrite(0x00, MANTIS_INT_MASK);
if (request_irq(pdev->irq, mantis_pci_irq, IRQF_SHARED | IRQF_DISABLED,
DRIVER_NAME, mantis) < 0) {
dprintk(verbose, MANTIS_ERROR, 1, "Mantis IRQ reg failed");
ret = -ENODEV;
goto err2;
}
pci_set_master(pdev);
pci_set_drvdata(pdev, mantis);
pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &latency);
pci_read_config_byte(pdev, PCI_CLASS_REVISION, &revision);
mantis->latency = latency;
mantis->revision = revision;
mantis->pdev = pdev;
init_waitqueue_head(&mantis->i2c_wq);
// CAM bypass
//mmwrite(mmread(MANTIS_INT_MASK) | MANTIS_INT_IRQ1, MANTIS_INT_MASK);
dprintk(verbose, MANTIS_INFO, 1, "gpif status: %04x irqcfg: %04x", mmread(0x9c), mmread(0x98));
if ((mmread(0x9c) & 0x200) != 0) { //CAM inserted
msleep_interruptible(1);
if ((mmread(0x9c) & 0x200) != 0)
mmwrite(((mmread(0x98) | 0x01) & ~0x02), 0x98);
else
mmwrite(((mmread(0x98) | 0x02) & ~0x01), 0x98);
} else {
mmwrite(((mmread(0x98) | 0x02) & ~0x01), 0x98);
}
mantis_set_direction(mantis, 0);
// default latency if none specified
if (!latency)
pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 32);
dprintk(verbose, MANTIS_ERROR, 0, "Mantis Rev %d, ",
mantis->revision);
dprintk(verbose, MANTIS_ERROR, 0,
"irq: %d, latency: %d\n memory: 0x%lx, mmio: 0x%p\n",
pdev->irq, mantis->latency,
mantis->mantis_addr, mantis->mantis_mmio);
// No more PCI specific stuff !
if (mantis_core_init(mantis) < 0) {
dprintk(verbose, MANTIS_ERROR, 1, "Mantis core init failed");
ret = -ENODEV;
goto err2;
}
return 0;
// Error conditions ..
err2:
dprintk(verbose, MANTIS_DEBUG, 1, "Err: IO Unmap");
if (mantis->mantis_mmio)
iounmap(mantis->mantis_mmio);
err1:
dprintk(verbose, MANTIS_DEBUG, 1, "Err: Release regions");
release_mem_region(pci_resource_start(pdev, 0),
pci_resource_len(pdev, 0));
pci_disable_device(pdev);
err0:
dprintk(verbose, MANTIS_DEBUG, 1, "Err: Free");
kfree(mantis);
err:
dprintk(verbose, MANTIS_DEBUG, 1, "Err:");
return ret;
}
static void __devexit mantis_pci_remove(struct pci_dev *pdev)
{
struct mantis_pci *mantis = pci_get_drvdata(pdev);
if (mantis == NULL) {
dprintk(verbose, MANTIS_ERROR, 1, "Aeio, Mantis NULL ptr");
return;
}
mantis_core_exit(mantis);
dprintk(verbose, MANTIS_ERROR, 1, "Removing -->Mantis irq: %d, latency: %d\n memory: 0x%lx, mmio: 0x%p",
pdev->irq, mantis->latency, mantis->mantis_addr,
mantis->mantis_mmio);
free_irq(pdev->irq, mantis);
pci_release_regions(pdev);
if (mantis_dma_exit(mantis) < 0)
dprintk(verbose, MANTIS_ERROR, 1, "DMA exit failed");
pci_set_drvdata(pdev, NULL);
pci_disable_device(pdev);
kfree(mantis);
}
static struct pci_driver mantis_pci_driver = {
.name = DRIVER_NAME,
.id_table = mantis_pci_table,
.probe = mantis_pci_probe,
.remove = mantis_pci_remove,
};
static int __devinit mantis_pci_init(void)
{
return pci_register_driver(&mantis_pci_driver);
}
static void __devexit mantis_pci_exit(void)
{
pci_unregister_driver(&mantis_pci_driver);
}
module_init(mantis_pci_init);
module_exit(mantis_pci_exit);
MODULE_DESCRIPTION("Mantis PCI DTV bridge driver");
MODULE_AUTHOR("Manu Abraham");
MODULE_LICENSE("GPL");