forked from mirrors/linux
79150ac9f3
Cleanup blank lines, remove wrong links to http://www.gnu.org/copyleft/gpl.html (the driver is licensed under the terms of GPLv2, but the link points to a copy of the GPLv3), and fix the filename reference in ddbridge-i2c.h. [mchehab@kernel.org: removed whitespace changes at the licensing text, as we didn't get any acks from the authors with regards to changing the text] Cc: Ralph Metzler <rjkm@metzlerbros.de> Cc: Manfred Voelkel <mvoelkel@DigitalDevices.de> Signed-off-by: Daniel Scheller <d.scheller@gmx.net> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
322 lines
7.9 KiB
C
322 lines
7.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* ddbridge.c: Digital Devices PCIe bridge driver
|
|
*
|
|
* Copyright (C) 2010-2017 Digital Devices GmbH
|
|
* Ralph Metzler <rjkm@metzlerbros.de>
|
|
* Marcus Metzler <mocm@metzlerbros.de>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* version 2 only, as published by the Free Software Foundation.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/poll.h>
|
|
#include <linux/io.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/pci_ids.h>
|
|
#include <linux/timer.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/swab.h>
|
|
#include <linux/vmalloc.h>
|
|
|
|
#include "ddbridge.h"
|
|
#include "ddbridge-i2c.h"
|
|
#include "ddbridge-regs.h"
|
|
#include "ddbridge-hw.h"
|
|
#include "ddbridge-io.h"
|
|
|
|
/****************************************************************************/
|
|
/* module parameters */
|
|
|
|
#ifdef CONFIG_PCI_MSI
|
|
#ifdef CONFIG_DVB_DDBRIDGE_MSIENABLE
|
|
static int msi = 1;
|
|
#else
|
|
static int msi;
|
|
#endif
|
|
module_param(msi, int, 0444);
|
|
#ifdef CONFIG_DVB_DDBRIDGE_MSIENABLE
|
|
MODULE_PARM_DESC(msi, "Control MSI interrupts: 0-disable, 1-enable (default)");
|
|
#else
|
|
MODULE_PARM_DESC(msi, "Control MSI interrupts: 0-disable (default), 1-enable");
|
|
#endif
|
|
#endif
|
|
|
|
/****************************************************************************/
|
|
/****************************************************************************/
|
|
/****************************************************************************/
|
|
|
|
static void ddb_irq_disable(struct ddb *dev)
|
|
{
|
|
ddbwritel(dev, 0, INTERRUPT_ENABLE);
|
|
ddbwritel(dev, 0, MSI1_ENABLE);
|
|
}
|
|
|
|
static void ddb_msi_exit(struct ddb *dev)
|
|
{
|
|
#ifdef CONFIG_PCI_MSI
|
|
if (dev->msi)
|
|
pci_free_irq_vectors(dev->pdev);
|
|
#endif
|
|
}
|
|
|
|
static void ddb_irq_exit(struct ddb *dev)
|
|
{
|
|
ddb_irq_disable(dev);
|
|
if (dev->msi == 2)
|
|
free_irq(pci_irq_vector(dev->pdev, 1), dev);
|
|
free_irq(pci_irq_vector(dev->pdev, 0), dev);
|
|
}
|
|
|
|
static void ddb_remove(struct pci_dev *pdev)
|
|
{
|
|
struct ddb *dev = (struct ddb *)pci_get_drvdata(pdev);
|
|
|
|
ddb_device_destroy(dev);
|
|
ddb_ports_detach(dev);
|
|
ddb_i2c_release(dev);
|
|
|
|
ddb_irq_exit(dev);
|
|
ddb_msi_exit(dev);
|
|
ddb_ports_release(dev);
|
|
ddb_buffers_free(dev);
|
|
|
|
ddb_unmap(dev);
|
|
pci_set_drvdata(pdev, NULL);
|
|
pci_disable_device(pdev);
|
|
}
|
|
|
|
#ifdef CONFIG_PCI_MSI
|
|
static void ddb_irq_msi(struct ddb *dev, int nr)
|
|
{
|
|
int stat;
|
|
|
|
if (msi && pci_msi_enabled()) {
|
|
stat = pci_alloc_irq_vectors(dev->pdev, 1, nr,
|
|
PCI_IRQ_MSI | PCI_IRQ_MSIX);
|
|
if (stat >= 1) {
|
|
dev->msi = stat;
|
|
dev_info(dev->dev, "using %d MSI interrupt(s)\n",
|
|
dev->msi);
|
|
} else {
|
|
dev_info(dev->dev, "MSI not available.\n");
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
static int ddb_irq_init(struct ddb *dev)
|
|
{
|
|
int stat;
|
|
int irq_flag = IRQF_SHARED;
|
|
|
|
ddbwritel(dev, 0x00000000, INTERRUPT_ENABLE);
|
|
ddbwritel(dev, 0x00000000, MSI1_ENABLE);
|
|
ddbwritel(dev, 0x00000000, MSI2_ENABLE);
|
|
ddbwritel(dev, 0x00000000, MSI3_ENABLE);
|
|
ddbwritel(dev, 0x00000000, MSI4_ENABLE);
|
|
ddbwritel(dev, 0x00000000, MSI5_ENABLE);
|
|
ddbwritel(dev, 0x00000000, MSI6_ENABLE);
|
|
ddbwritel(dev, 0x00000000, MSI7_ENABLE);
|
|
|
|
#ifdef CONFIG_PCI_MSI
|
|
ddb_irq_msi(dev, 2);
|
|
|
|
if (dev->msi)
|
|
irq_flag = 0;
|
|
if (dev->msi == 2) {
|
|
stat = request_irq(pci_irq_vector(dev->pdev, 0),
|
|
ddb_irq_handler0, irq_flag, "ddbridge",
|
|
(void *)dev);
|
|
if (stat < 0)
|
|
return stat;
|
|
stat = request_irq(pci_irq_vector(dev->pdev, 1),
|
|
ddb_irq_handler1, irq_flag, "ddbridge",
|
|
(void *)dev);
|
|
if (stat < 0) {
|
|
free_irq(pci_irq_vector(dev->pdev, 0), dev);
|
|
return stat;
|
|
}
|
|
} else
|
|
#endif
|
|
{
|
|
stat = request_irq(pci_irq_vector(dev->pdev, 0),
|
|
ddb_irq_handler, irq_flag, "ddbridge",
|
|
(void *)dev);
|
|
if (stat < 0)
|
|
return stat;
|
|
}
|
|
if (dev->msi == 2) {
|
|
ddbwritel(dev, 0x0fffff00, INTERRUPT_ENABLE);
|
|
ddbwritel(dev, 0x0000000f, MSI1_ENABLE);
|
|
} else {
|
|
ddbwritel(dev, 0x0fffff0f, INTERRUPT_ENABLE);
|
|
ddbwritel(dev, 0x00000000, MSI1_ENABLE);
|
|
}
|
|
return stat;
|
|
}
|
|
|
|
static int ddb_probe(struct pci_dev *pdev,
|
|
const struct pci_device_id *id)
|
|
{
|
|
struct ddb *dev;
|
|
int stat = 0;
|
|
|
|
if (pci_enable_device(pdev) < 0)
|
|
return -ENODEV;
|
|
|
|
pci_set_master(pdev);
|
|
|
|
if (pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
|
|
if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
|
|
return -ENODEV;
|
|
|
|
dev = vzalloc(sizeof(*dev));
|
|
if (!dev)
|
|
return -ENOMEM;
|
|
|
|
mutex_init(&dev->mutex);
|
|
dev->has_dma = 1;
|
|
dev->pdev = pdev;
|
|
dev->dev = &pdev->dev;
|
|
pci_set_drvdata(pdev, dev);
|
|
|
|
dev->link[0].ids.vendor = id->vendor;
|
|
dev->link[0].ids.device = id->device;
|
|
dev->link[0].ids.subvendor = id->subvendor;
|
|
dev->link[0].ids.subdevice = pdev->subsystem_device;
|
|
dev->link[0].ids.devid = (id->device << 16) | id->vendor;
|
|
|
|
dev->link[0].dev = dev;
|
|
dev->link[0].info = get_ddb_info(id->vendor, id->device,
|
|
id->subvendor, pdev->subsystem_device);
|
|
|
|
dev_info(&pdev->dev, "detected %s\n", dev->link[0].info->name);
|
|
|
|
dev->regs_len = pci_resource_len(dev->pdev, 0);
|
|
dev->regs = ioremap(pci_resource_start(dev->pdev, 0),
|
|
pci_resource_len(dev->pdev, 0));
|
|
|
|
if (!dev->regs) {
|
|
dev_err(&pdev->dev, "not enough memory for register map\n");
|
|
stat = -ENOMEM;
|
|
goto fail;
|
|
}
|
|
if (ddbreadl(dev, 0) == 0xffffffff) {
|
|
dev_err(&pdev->dev, "cannot read registers\n");
|
|
stat = -ENODEV;
|
|
goto fail;
|
|
}
|
|
|
|
dev->link[0].ids.hwid = ddbreadl(dev, 0);
|
|
dev->link[0].ids.regmapid = ddbreadl(dev, 4);
|
|
|
|
dev_info(&pdev->dev, "HW %08x REGMAP %08x\n",
|
|
dev->link[0].ids.hwid, dev->link[0].ids.regmapid);
|
|
|
|
ddbwritel(dev, 0, DMA_BASE_READ);
|
|
ddbwritel(dev, 0, DMA_BASE_WRITE);
|
|
|
|
stat = ddb_irq_init(dev);
|
|
if (stat < 0)
|
|
goto fail0;
|
|
|
|
if (ddb_init(dev) == 0)
|
|
return 0;
|
|
|
|
ddb_irq_exit(dev);
|
|
fail0:
|
|
dev_err(&pdev->dev, "fail0\n");
|
|
ddb_msi_exit(dev);
|
|
fail:
|
|
dev_err(&pdev->dev, "fail\n");
|
|
|
|
ddb_unmap(dev);
|
|
pci_set_drvdata(pdev, NULL);
|
|
pci_disable_device(pdev);
|
|
return -1;
|
|
}
|
|
|
|
/****************************************************************************/
|
|
/****************************************************************************/
|
|
/****************************************************************************/
|
|
|
|
#define DDB_DEVICE_ANY(_device) \
|
|
{ PCI_DEVICE_SUB(DDVID, _device, DDVID, PCI_ANY_ID) }
|
|
|
|
static const struct pci_device_id ddb_id_table[] = {
|
|
DDB_DEVICE_ANY(0x0002),
|
|
DDB_DEVICE_ANY(0x0003),
|
|
DDB_DEVICE_ANY(0x0005),
|
|
DDB_DEVICE_ANY(0x0006),
|
|
DDB_DEVICE_ANY(0x0007),
|
|
DDB_DEVICE_ANY(0x0008),
|
|
DDB_DEVICE_ANY(0x0009),
|
|
DDB_DEVICE_ANY(0x0011),
|
|
DDB_DEVICE_ANY(0x0012),
|
|
DDB_DEVICE_ANY(0x0013),
|
|
DDB_DEVICE_ANY(0x0201),
|
|
DDB_DEVICE_ANY(0x0203),
|
|
DDB_DEVICE_ANY(0x0210),
|
|
DDB_DEVICE_ANY(0x0220),
|
|
DDB_DEVICE_ANY(0x0320),
|
|
DDB_DEVICE_ANY(0x0321),
|
|
DDB_DEVICE_ANY(0x0322),
|
|
DDB_DEVICE_ANY(0x0323),
|
|
DDB_DEVICE_ANY(0x0328),
|
|
DDB_DEVICE_ANY(0x0329),
|
|
{0}
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(pci, ddb_id_table);
|
|
|
|
static struct pci_driver ddb_pci_driver = {
|
|
.name = "ddbridge",
|
|
.id_table = ddb_id_table,
|
|
.probe = ddb_probe,
|
|
.remove = ddb_remove,
|
|
};
|
|
|
|
static __init int module_init_ddbridge(void)
|
|
{
|
|
int stat;
|
|
|
|
pr_info("Digital Devices PCIE bridge driver "
|
|
DDBRIDGE_VERSION
|
|
", Copyright (C) 2010-17 Digital Devices GmbH\n");
|
|
stat = ddb_init_ddbridge();
|
|
if (stat < 0)
|
|
return stat;
|
|
stat = pci_register_driver(&ddb_pci_driver);
|
|
if (stat < 0)
|
|
ddb_exit_ddbridge(0, stat);
|
|
|
|
return stat;
|
|
}
|
|
|
|
static __exit void module_exit_ddbridge(void)
|
|
{
|
|
pci_unregister_driver(&ddb_pci_driver);
|
|
ddb_exit_ddbridge(0, 0);
|
|
}
|
|
|
|
module_init(module_init_ddbridge);
|
|
module_exit(module_exit_ddbridge);
|
|
|
|
MODULE_DESCRIPTION("Digital Devices PCIe Bridge");
|
|
MODULE_AUTHOR("Ralph and Marcus Metzler, Metzler Brothers Systementwicklung GbR");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_VERSION(DDBRIDGE_VERSION);
|