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/*
* Intel(R) Trace Hub pci driver
*
* Copyright (C) 2014-2015 Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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/types.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/sysfs.h>
#include <linux/pci.h>
#include "intel_th.h"
#define DRIVER_NAME "intel_th_pci"
#define BAR_MASK (BIT(TH_MMIO_CONFIG) | BIT(TH_MMIO_SW))
#define PCI_REG_NPKDSC 0x80
#define NPKDSC_TSACT BIT(5)
static int intel_th_pci_activate(struct intel_th *th)
{
struct pci_dev *pdev = to_pci_dev(th->dev);
u32 npkdsc;
int err;
if (!INTEL_TH_CAP(th, tscu_enable))
return 0;
err = pci_read_config_dword(pdev, PCI_REG_NPKDSC, &npkdsc);
if (!err) {
npkdsc |= NPKDSC_TSACT;
err = pci_write_config_dword(pdev, PCI_REG_NPKDSC, npkdsc);
}
if (err)
dev_err(&pdev->dev, "failed to read NPKDSC register\n");
return err;
}
static void intel_th_pci_deactivate(struct intel_th *th)
{
struct pci_dev *pdev = to_pci_dev(th->dev);
u32 npkdsc;
int err;
if (!INTEL_TH_CAP(th, tscu_enable))
return;
err = pci_read_config_dword(pdev, PCI_REG_NPKDSC, &npkdsc);
if (!err) {
npkdsc |= NPKDSC_TSACT;
err = pci_write_config_dword(pdev, PCI_REG_NPKDSC, npkdsc);
}
if (err)
dev_err(&pdev->dev, "failed to read NPKDSC register\n");
}
static int intel_th_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
struct intel_th_drvdata *drvdata = (void *)id->driver_data;
struct intel_th *th;
int err;
err = pcim_enable_device(pdev);
if (err)
return err;
err = pcim_iomap_regions_request_all(pdev, BAR_MASK, DRIVER_NAME);
if (err)
return err;
th = intel_th_alloc(&pdev->dev, drvdata, pdev->resource,
DEVICE_COUNT_RESOURCE, pdev->irq);
if (IS_ERR(th))
return PTR_ERR(th);
th->activate = intel_th_pci_activate;
th->deactivate = intel_th_pci_deactivate;
pci_set_master(pdev);
return 0;
}
static void intel_th_pci_remove(struct pci_dev *pdev)
{
struct intel_th *th = pci_get_drvdata(pdev);
intel_th_free(th);
}
static const struct intel_th_drvdata intel_th_2x = {
.tscu_enable = 1,
};
static const struct pci_device_id intel_th_pci_id_table[] = {
{
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x9d26),
.driver_data = (kernel_ulong_t)0,
},
{
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa126),
.driver_data = (kernel_ulong_t)0,
},
{
/* Apollo Lake */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x5a8e),
.driver_data = (kernel_ulong_t)0,
},
{
/* Broxton */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0a80),
.driver_data = (kernel_ulong_t)0,
},
{
/* Broxton B-step */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x1a8e),
.driver_data = (kernel_ulong_t)0,
},
{
/* Kaby Lake PCH-H */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa2a6),
.driver_data = (kernel_ulong_t)0,
},
{
/* Denverton */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x19e1),
.driver_data = (kernel_ulong_t)0,
},
{
/* Gemini Lake */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x318e),
.driver_data = (kernel_ulong_t)&intel_th_2x,
},
{
/* Cannon Lake H */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa326),
.driver_data = (kernel_ulong_t)&intel_th_2x,
},
{
/* Cannon Lake LP */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x9da6),
.driver_data = (kernel_ulong_t)&intel_th_2x,
},
{
/* Cedar Fork PCH */
PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x18e1),
.driver_data = (kernel_ulong_t)&intel_th_2x,
},
{ 0 },
};
MODULE_DEVICE_TABLE(pci, intel_th_pci_id_table);
static struct pci_driver intel_th_pci_driver = {
.name = DRIVER_NAME,
.id_table = intel_th_pci_id_table,
.probe = intel_th_pci_probe,
.remove = intel_th_pci_remove,
};
module_pci_driver(intel_th_pci_driver);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Intel(R) Trace Hub PCI controller driver");
MODULE_AUTHOR("Alexander Shishkin <alexander.shishkin@intel.com>");
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