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dddvb/ddbridge/ddbridge-main.c

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/*
* ddbridge.c: Digital Devices PCIe bridge driver
*
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* Copyright (C) 2010-2017 Digital Devices GmbH
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* Ralph Metzler <rjkm@metzlerbros.de>
* Marcus Metzler <mocm@metzlerbros.de>
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*
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*
* 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.
*
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA
* Or, point your browser to http://www.gnu.org/copyleft/gpl.html
*/
#include "ddbridge.h"
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#include "ddbridge-io.h"
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#ifdef CONFIG_PCI_MSI
static int msi = 1;
module_param(msi, int, 0444);
MODULE_PARM_DESC(msi,
" Control MSI interrupts: 0-disable, 1-enable (default)");
#endif
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extern struct workqueue_struct *ddb_wq;
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/****************************************************************************/
/****************************************************************************/
/****************************************************************************/
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static void __devexit ddb_irq_disable(struct ddb *dev)
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{
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if (dev->link[0].info->regmap->irq_version == 2) {
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ddbwritel(dev, 0x00000000, INTERRUPT_V2_CONTROL);
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ddbwritel(dev, 0x00000000, INTERRUPT_V2_ENABLE_1);
ddbwritel(dev, 0x00000000, INTERRUPT_V2_ENABLE_2);
ddbwritel(dev, 0x00000000, INTERRUPT_V2_ENABLE_3);
ddbwritel(dev, 0x00000000, INTERRUPT_V2_ENABLE_4);
ddbwritel(dev, 0x00000000, INTERRUPT_V2_ENABLE_5);
ddbwritel(dev, 0x00000000, INTERRUPT_V2_ENABLE_6);
ddbwritel(dev, 0x00000000, INTERRUPT_V2_ENABLE_7);
} else {
ddbwritel(dev, 0, INTERRUPT_ENABLE);
ddbwritel(dev, 0, MSI1_ENABLE);
}
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}
static void __devexit ddb_irq_exit(struct ddb *dev)
{
ddb_irq_disable(dev);
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if (dev->msi == 2)
free_irq(dev->pdev->irq + 1, dev);
free_irq(dev->pdev->irq, dev);
#ifdef CONFIG_PCI_MSI
if (dev->msi)
pci_disable_msi(dev->pdev);
#endif
}
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static void __devexit ddb_remove(struct pci_dev *pdev)
{
struct ddb *dev = (struct ddb *) pci_get_drvdata(pdev);
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ddb_device_destroy(dev);
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ddb_nsd_detach(dev);
ddb_ports_detach(dev);
ddb_i2c_release(dev);
if (dev->link[0].info->ns_num)
ddbwritel(dev, 0, ETHER_CONTROL);
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ddb_irq_exit(dev);
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ddb_ports_release(dev);
ddb_buffers_free(dev);
ddb_unmap(dev);
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pci_set_drvdata(pdev, NULL);
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pci_disable_device(pdev);
}
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 8, 0))
#define __devinit
#define __devinitdata
#endif
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static int __devinit ddb_irq_msi(struct ddb *dev, int nr)
{
int stat = 0;
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#ifdef CONFIG_PCI_MSI
if (msi && pci_msi_enabled()) {
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 15, 0))
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#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0))
stat = pci_alloc_irq_vectors(dev->pdev, 1, nr, PCI_IRQ_MSI);
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#else
stat = pci_enable_msi_range(dev->pdev, 1, nr);
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#endif
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if (stat >= 1) {
dev->msi = stat;
pr_info("DDBridge: using %d MSI interrupt(s)\n",
dev->msi);
} else
pr_info("DDBridge: MSI not available.\n");
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#else
stat = pci_enable_msi_block(dev->pdev, nr);
if (stat == 0) {
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dev->msi = nr;
pr_info("DDBridge: using %d MSI interrupts\n", nr);
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} else if (stat == 1) {
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stat = pci_enable_msi(dev->pdev);
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dev->msi = 1;
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}
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if (stat < 0)
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pr_info("DDBridge: MSI not available.\n");
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#endif
}
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#endif
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return stat;
}
static int __devinit ddb_irq_init2(struct ddb *dev)
{
int stat;
int irq_flag = IRQF_SHARED;
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pr_info("DDBridge: init type 2 IRQ hardware block\n");
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ddbwritel(dev, 0x00000000, INTERRUPT_V2_CONTROL);
ddbwritel(dev, 0x00000000, INTERRUPT_V2_ENABLE_1);
ddbwritel(dev, 0x00000000, INTERRUPT_V2_ENABLE_2);
ddbwritel(dev, 0x00000000, INTERRUPT_V2_ENABLE_3);
ddbwritel(dev, 0x00000000, INTERRUPT_V2_ENABLE_4);
ddbwritel(dev, 0x00000000, INTERRUPT_V2_ENABLE_5);
ddbwritel(dev, 0x00000000, INTERRUPT_V2_ENABLE_6);
ddbwritel(dev, 0x00000000, INTERRUPT_V2_ENABLE_7);
ddb_irq_msi(dev, 1);
if (dev->msi)
irq_flag = 0;
stat = request_irq(dev->pdev->irq, irq_handler_v2,
irq_flag, "ddbridge", (void *) dev);
if (stat < 0)
return stat;
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ddbwritel(dev, 0x0000ff7f, INTERRUPT_V2_CONTROL);
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ddbwritel(dev, 0xffffffff, INTERRUPT_V2_ENABLE_1);
ddbwritel(dev, 0xffffffff, INTERRUPT_V2_ENABLE_2);
ddbwritel(dev, 0xffffffff, INTERRUPT_V2_ENABLE_3);
ddbwritel(dev, 0xffffffff, INTERRUPT_V2_ENABLE_4);
ddbwritel(dev, 0xffffffff, INTERRUPT_V2_ENABLE_5);
ddbwritel(dev, 0xffffffff, INTERRUPT_V2_ENABLE_6);
ddbwritel(dev, 0xffffffff, INTERRUPT_V2_ENABLE_7);
return stat;
}
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static int __devinit ddb_irq_init(struct ddb *dev)
{
int stat;
int irq_flag = IRQF_SHARED;
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if (dev->link[0].info->regmap->irq_version == 2)
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return ddb_irq_init2(dev);
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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);
ddb_irq_msi(dev, 2);
if (dev->msi)
irq_flag = 0;
if (dev->msi == 2) {
stat = request_irq(dev->pdev->irq, irq_handler0,
irq_flag, "ddbridge", (void *) dev);
if (stat < 0)
return stat;
stat = request_irq(dev->pdev->irq + 1, irq_handler1,
irq_flag, "ddbridge", (void *) dev);
if (stat < 0) {
free_irq(dev->pdev->irq, dev);
return stat;
}
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} else {
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#ifdef DDB_TEST_THREADED
stat = request_threaded_irq(dev->pdev->irq, irq_handler,
irq_thread,
irq_flag,
"ddbridge", (void *) dev);
#else
stat = request_irq(dev->pdev->irq, irq_handler,
irq_flag, "ddbridge", (void *) dev);
#endif
if (stat < 0)
return stat;
}
/*ddbwritel(dev, 0xffffffff, INTERRUPT_ACK);*/
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;
}
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static int __devinit 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;
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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;
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dev = vzalloc(sizeof(struct ddb));
if (dev == NULL)
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;
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dev->link[0].dev = dev;
dev->link[0].info = get_ddb_info(id->vendor, id->device,
id->subvendor, pdev->subsystem_device);
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pr_info("DDBridge: device name: %s\n", dev->link[0].info->name);
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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) {
pr_err("DDBridge: not enough memory for register map\n");
stat = -ENOMEM;
goto fail;
}
if (ddbreadl(dev, 0) == 0xffffffff) {
pr_err("DDBridge: cannot read registers\n");
stat = -ENODEV;
goto fail;
}
dev->link[0].ids.hwid = ddbreadl(dev, 0);
dev->link[0].ids.regmapid = ddbreadl(dev, 4);
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pr_info("DDBridge: HW %08x REGMAP %08x\n",
dev->link[0].ids.hwid, dev->link[0].ids.regmapid);
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if (dev->link[0].info->ns_num) {
ddbwritel(dev, 0, ETHER_CONTROL);
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ddb_reset_ios(dev);
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}
ddbwritel(dev, 0, DMA_BASE_READ);
if (dev->link[0].info->type != DDB_MOD)
ddbwritel(dev, 0, DMA_BASE_WRITE);
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if (dev->link[0].info->type == DDB_MOD) {
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if (dev->link[0].info->version <= 1)
if (ddbreadl(dev, 0x1c) == 4)
dev->link[0].info->port_num = 4;
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}
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stat = ddb_irq_init(dev);
if (stat < 0)
goto fail0;
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if (ddb_init(dev) == 0)
return 0;
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ddb_irq_exit(dev);
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fail0:
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pr_err("DDBridge: fail0\n");
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if (dev->msi)
pci_disable_msi(dev->pdev);
fail:
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pr_err("DDBridge: fail\n");
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ddb_unmap(dev);
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pci_set_drvdata(pdev, NULL);
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pci_disable_device(pdev);
return -1;
}
/****************************************************************************/
/****************************************************************************/
/****************************************************************************/
#define DDB_DEVICE_ANY(_device) { PCI_DEVICE_SUB(0xdd01, _device, 0xdd01, PCI_ANY_ID) }
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static const struct pci_device_id ddb_id_table[] __devinitconst = {
DDB_DEVICE_ANY(0x0002),
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DDB_DEVICE_ANY(0x0003),
DDB_DEVICE_ANY(0x0005),
DDB_DEVICE_ANY(0x0006),
DDB_DEVICE_ANY(0x0007),
DDB_DEVICE_ANY(0x0008),
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),
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{0}
};
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MODULE_DEVICE_TABLE(pci, ddb_id_table);
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static struct pci_driver ddb_pci_driver = {
.name = "ddbridge",
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.id_table = ddb_id_table,
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.probe = ddb_probe,
.remove = ddb_remove,
};
static __init int module_init_ddbridge(void)
{
int stat = -1;
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pr_info("DDBridge: Digital Devices PCIE bridge driver "
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DDBRIDGE_VERSION
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", Copyright (C) 2010-17 Digital Devices GmbH\n");
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if (ddb_class_create() < 0)
return -1;
ddb_wq = create_workqueue("ddbridge");
if (ddb_wq == NULL)
goto exit1;
stat = pci_register_driver(&ddb_pci_driver);
if (stat < 0)
goto exit2;
return stat;
exit2:
destroy_workqueue(ddb_wq);
exit1:
ddb_class_destroy();
return stat;
}
static __exit void module_exit_ddbridge(void)
{
pci_unregister_driver(&ddb_pci_driver);
destroy_workqueue(ddb_wq);
ddb_class_destroy();
}
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");
MODULE_VERSION(DDBRIDGE_VERSION);