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![Alexander Shishkin](/assets/img/avatar_default.png)
This adds Intel(R) Trace Hub PCI ID for Ice Lake PCH. Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
184 lines
3.9 KiB
C
184 lines
3.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Intel(R) Trace Hub pci driver
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*
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* Copyright (C) 2014-2015 Intel Corporation.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/types.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/sysfs.h>
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#include <linux/pci.h>
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#include "intel_th.h"
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#define DRIVER_NAME "intel_th_pci"
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#define BAR_MASK (BIT(TH_MMIO_CONFIG) | BIT(TH_MMIO_SW))
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#define PCI_REG_NPKDSC 0x80
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#define NPKDSC_TSACT BIT(5)
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static int intel_th_pci_activate(struct intel_th *th)
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{
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struct pci_dev *pdev = to_pci_dev(th->dev);
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u32 npkdsc;
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int err;
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if (!INTEL_TH_CAP(th, tscu_enable))
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return 0;
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err = pci_read_config_dword(pdev, PCI_REG_NPKDSC, &npkdsc);
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if (!err) {
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npkdsc |= NPKDSC_TSACT;
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err = pci_write_config_dword(pdev, PCI_REG_NPKDSC, npkdsc);
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}
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if (err)
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dev_err(&pdev->dev, "failed to read NPKDSC register\n");
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return err;
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}
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static void intel_th_pci_deactivate(struct intel_th *th)
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{
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struct pci_dev *pdev = to_pci_dev(th->dev);
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u32 npkdsc;
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int err;
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if (!INTEL_TH_CAP(th, tscu_enable))
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return;
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err = pci_read_config_dword(pdev, PCI_REG_NPKDSC, &npkdsc);
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if (!err) {
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npkdsc |= NPKDSC_TSACT;
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err = pci_write_config_dword(pdev, PCI_REG_NPKDSC, npkdsc);
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}
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if (err)
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dev_err(&pdev->dev, "failed to read NPKDSC register\n");
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}
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static int intel_th_pci_probe(struct pci_dev *pdev,
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const struct pci_device_id *id)
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{
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struct intel_th_drvdata *drvdata = (void *)id->driver_data;
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struct intel_th *th;
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int err;
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err = pcim_enable_device(pdev);
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if (err)
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return err;
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err = pcim_iomap_regions_request_all(pdev, BAR_MASK, DRIVER_NAME);
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if (err)
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return err;
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th = intel_th_alloc(&pdev->dev, drvdata, pdev->resource,
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DEVICE_COUNT_RESOURCE, pdev->irq);
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if (IS_ERR(th))
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return PTR_ERR(th);
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th->activate = intel_th_pci_activate;
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th->deactivate = intel_th_pci_deactivate;
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pci_set_master(pdev);
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return 0;
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}
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static void intel_th_pci_remove(struct pci_dev *pdev)
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{
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struct intel_th *th = pci_get_drvdata(pdev);
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intel_th_free(th);
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}
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static const struct intel_th_drvdata intel_th_2x = {
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.tscu_enable = 1,
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};
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static const struct pci_device_id intel_th_pci_id_table[] = {
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{
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PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x9d26),
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.driver_data = (kernel_ulong_t)0,
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},
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{
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PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa126),
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.driver_data = (kernel_ulong_t)0,
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},
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{
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/* Apollo Lake */
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PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x5a8e),
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.driver_data = (kernel_ulong_t)0,
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},
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{
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/* Broxton */
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PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0a80),
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.driver_data = (kernel_ulong_t)0,
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},
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{
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/* Broxton B-step */
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PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x1a8e),
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.driver_data = (kernel_ulong_t)0,
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},
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{
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/* Kaby Lake PCH-H */
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PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa2a6),
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.driver_data = (kernel_ulong_t)0,
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},
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{
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/* Denverton */
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PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x19e1),
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.driver_data = (kernel_ulong_t)0,
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},
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{
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/* Lewisburg PCH */
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PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa1a6),
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.driver_data = (kernel_ulong_t)0,
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},
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{
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/* Gemini Lake */
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PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x318e),
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.driver_data = (kernel_ulong_t)&intel_th_2x,
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},
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{
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/* Cannon Lake H */
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PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa326),
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.driver_data = (kernel_ulong_t)&intel_th_2x,
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},
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{
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/* Cannon Lake LP */
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PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x9da6),
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.driver_data = (kernel_ulong_t)&intel_th_2x,
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},
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{
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/* Cedar Fork PCH */
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PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x18e1),
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.driver_data = (kernel_ulong_t)&intel_th_2x,
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},
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{
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/* Ice Lake PCH */
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PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x34a6),
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.driver_data = (kernel_ulong_t)&intel_th_2x,
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},
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{ 0 },
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};
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MODULE_DEVICE_TABLE(pci, intel_th_pci_id_table);
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static struct pci_driver intel_th_pci_driver = {
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.name = DRIVER_NAME,
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.id_table = intel_th_pci_id_table,
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.probe = intel_th_pci_probe,
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.remove = intel_th_pci_remove,
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};
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module_pci_driver(intel_th_pci_driver);
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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("Intel(R) Trace Hub PCI controller driver");
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MODULE_AUTHOR("Alexander Shishkin <alexander.shishkin@intel.com>");
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