mantis_pci.c
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/*
Mantis PCI bridge driver
Copyright (C) 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 <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <asm/io.h>
#include <asm/page.h>
#include <linux/kmod.h>
#include <linux/vmalloc.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/pci.h>
#include <asm/irq.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include "dmxdev.h"
#include "dvbdev.h"
#include "dvb_demux.h"
#include "dvb_frontend.h"
#include "dvb_net.h"
#include "mantis_common.h"
#include "mantis_reg.h"
#include "mantis_pci.h"
#define DRIVER_NAME "Mantis Core"
int mantis_pci_init(struct mantis_pci *mantis)
{
u8 latency;
struct mantis_hwconfig *config = mantis->hwconfig;
struct pci_dev *pdev = mantis->pdev;
int err, ret = 0;
dprintk(MANTIS_ERROR, 0, "found a %s PCI %s device on (%02x:%02x.%x),\n",
config->model_name,
config->dev_type,
mantis->pdev->bus->number,
PCI_SLOT(mantis->pdev->devfn),
PCI_FUNC(mantis->pdev->devfn));
err = pci_enable_device(pdev);
if (err != 0) {
ret = -ENODEV;
dprintk(MANTIS_ERROR, 1, "ERROR: PCI enable failed <%i>", err);
goto fail0;
}
err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
if (err != 0) {
dprintk(MANTIS_ERROR, 1, "ERROR: Unable to obtain 32 bit DMA <%i>", err);
ret = -ENOMEM;
goto fail1;
}
pci_set_master(pdev);
if (!request_mem_region(pci_resource_start(pdev, 0),
pci_resource_len(pdev, 0),
DRIVER_NAME)) {
dprintk(MANTIS_ERROR, 1, "ERROR: BAR0 Request failed !");
ret = -ENODEV;
goto fail1;
}
mantis->mmio = ioremap(pci_resource_start(pdev, 0),
pci_resource_len(pdev, 0));
if (!mantis->mmio) {
dprintk(MANTIS_ERROR, 1, "ERROR: BAR0 remap failed !");
ret = -ENODEV;
goto fail2;
}
pci_read_config_byte(pdev, PCI_LATENCY_TIMER, &latency);
mantis->latency = latency;
mantis->revision = pdev->revision;
dprintk(MANTIS_ERROR, 0, " Mantis Rev %d [%04x:%04x], ",
mantis->revision,
mantis->pdev->subsystem_vendor,
mantis->pdev->subsystem_device);
dprintk(MANTIS_ERROR, 0,
"irq: %d, latency: %d\n memory: 0x%lx, mmio: 0x%p\n",
mantis->pdev->irq,
mantis->latency,
mantis->mantis_addr,
mantis->mmio);
err = request_irq(pdev->irq,
config->irq_handler,
IRQF_SHARED,
DRIVER_NAME,
mantis);
if (err != 0) {
dprintk(MANTIS_ERROR, 1, "ERROR: IRQ registration failed ! <%d>", err);
ret = -ENODEV;
goto fail3;
}
pci_set_drvdata(pdev, mantis);
return ret;
/* Error conditions */
fail3:
dprintk(MANTIS_ERROR, 1, "ERROR: <%d> I/O unmap", ret);
if (mantis->mmio)
iounmap(mantis->mmio);
fail2:
dprintk(MANTIS_ERROR, 1, "ERROR: <%d> releasing regions", ret);
release_mem_region(pci_resource_start(pdev, 0),
pci_resource_len(pdev, 0));
fail1:
dprintk(MANTIS_ERROR, 1, "ERROR: <%d> disabling device", ret);
pci_disable_device(pdev);
fail0:
dprintk(MANTIS_ERROR, 1, "ERROR: <%d> exiting", ret);
return ret;
}
EXPORT_SYMBOL_GPL(mantis_pci_init);
void mantis_pci_exit(struct mantis_pci *mantis)
{
struct pci_dev *pdev = mantis->pdev;
dprintk(MANTIS_NOTICE, 1, " mem: 0x%p", mantis->mmio);
free_irq(pdev->irq, mantis);
if (mantis->mmio) {
iounmap(mantis->mmio);
release_mem_region(pci_resource_start(pdev, 0),
pci_resource_len(pdev, 0));
}
pci_disable_device(pdev);
}
EXPORT_SYMBOL_GPL(mantis_pci_exit);
MODULE_DESCRIPTION("Mantis PCI DTV bridge driver");
MODULE_AUTHOR("Manu Abraham");
MODULE_LICENSE("GPL");