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// SPDX-License-Identifier: GPL-2.0-only
/*
* Intel Elkhart Lake Programmable Service Engine (PSE) I/O
*
* Copyright (c) 2025 Intel Corporation.
*
* Author: Raag Jadav <raag.jadav@intel.com>
*/
#include <linux/auxiliary_bus.h>
#include <linux/device/devres.h>
#include <linux/errno.h>
#include <linux/gfp_types.h>
#include <linux/ioport.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/sizes.h>
#include <linux/types.h>
#include <linux/ehl_pse_io_aux.h>
#define EHL_PSE_IO_DEV_SIZE SZ_4K
static int ehl_pse_io_dev_create(struct pci_dev *pci, const char *name, int idx)
{
struct device *dev = &pci->dev;
struct auxiliary_device *adev;
struct ehl_pse_io_data *data;
resource_size_t start, offset;
u32 id;
data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
if (!data)
return -ENOMEM;
id = (pci_domain_nr(pci->bus) << 16) | pci_dev_id(pci);
start = pci_resource_start(pci, 0);
offset = EHL_PSE_IO_DEV_SIZE * idx;
data->mem = DEFINE_RES_MEM(start + offset, EHL_PSE_IO_DEV_SIZE);
data->irq = pci_irq_vector(pci, idx);
adev = __devm_auxiliary_device_create(dev, EHL_PSE_IO_NAME, name, data, id);
return adev ? 0 : -ENODEV;
}
static int ehl_pse_io_probe(struct pci_dev *pci, const struct pci_device_id *id)
{
int ret;
ret = pcim_enable_device(pci);
if (ret)
return ret;
pci_set_master(pci);
ret = pci_alloc_irq_vectors(pci, 2, 2, PCI_IRQ_MSI);
if (ret < 0)
return ret;
ret = ehl_pse_io_dev_create(pci, EHL_PSE_GPIO_NAME, 0);
if (ret)
return ret;
return ehl_pse_io_dev_create(pci, EHL_PSE_TIO_NAME, 1);
}
static const struct pci_device_id ehl_pse_io_ids[] = {
{ PCI_VDEVICE(INTEL, 0x4b88) },
{ PCI_VDEVICE(INTEL, 0x4b89) },
{ }
};
MODULE_DEVICE_TABLE(pci, ehl_pse_io_ids);
static struct pci_driver ehl_pse_io_driver = {
.name = EHL_PSE_IO_NAME,
.id_table = ehl_pse_io_ids,
.probe = ehl_pse_io_probe,
};
module_pci_driver(ehl_pse_io_driver);
MODULE_AUTHOR("Raag Jadav <raag.jadav@intel.com>");
MODULE_DESCRIPTION("Intel Elkhart Lake PSE I/O driver");
MODULE_LICENSE("GPL");
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