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path: root/drivers/media/pci/mantis/mantis_pci.c
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-rw-r--r--drivers/media/pci/mantis/mantis_pci.c170
1 files changed, 170 insertions, 0 deletions
diff --git a/drivers/media/pci/mantis/mantis_pci.c b/drivers/media/pci/mantis/mantis_pci.c
new file mode 100644
index 00000000000..371558af2d9
--- /dev/null
+++ b/drivers/media/pci/mantis/mantis_pci.c
@@ -0,0 +1,170 @@
+/*
+ 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 __devinit 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);
+ pci_set_drvdata(pdev, NULL);
+ 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);
+ pci_set_drvdata(pdev, NULL);
+}
+EXPORT_SYMBOL_GPL(mantis_pci_exit);
+
+MODULE_DESCRIPTION("Mantis PCI DTV bridge driver");
+MODULE_AUTHOR("Manu Abraham");
+MODULE_LICENSE("GPL");