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// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2022 Microchip Technology Inc.
#include <linux/mfd/core.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/spinlock.h>
#include <linux/gpio/driver.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/idr.h>
#include "mchp_pci1xxxx_gp.h"
struct aux_bus_device {
struct auxiliary_device_wrapper *aux_device_wrapper[2];
};
static DEFINE_IDA(gp_client_ida);
static const char aux_dev_otp_e2p_name[15] = "gp_otp_e2p";
static const char aux_dev_gpio_name[15] = "gp_gpio";
static void gp_auxiliary_device_release(struct device *dev)
{
struct auxiliary_device_wrapper *aux_device_wrapper =
(struct auxiliary_device_wrapper *)container_of(dev,
struct auxiliary_device_wrapper, aux_dev.dev);
ida_free(&gp_client_ida, aux_device_wrapper->aux_dev.id);
kfree(aux_device_wrapper);
}
static int gp_aux_bus_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
struct aux_bus_device *aux_bus;
int retval;
retval = pcim_enable_device(pdev);
if (retval)
return retval;
aux_bus = devm_kzalloc(&pdev->dev, sizeof(*aux_bus), GFP_KERNEL);
if (!aux_bus)
return -ENOMEM;
aux_bus->aux_device_wrapper[0] = kzalloc(sizeof(*aux_bus->aux_device_wrapper[0]),
GFP_KERNEL);
if (!aux_bus->aux_device_wrapper[0])
return -ENOMEM;
retval = ida_alloc(&gp_client_ida, GFP_KERNEL);
if (retval < 0)
goto err_ida_alloc_0;
aux_bus->aux_device_wrapper[0]->aux_dev.name = aux_dev_otp_e2p_name;
aux_bus->aux_device_wrapper[0]->aux_dev.dev.parent = &pdev->dev;
aux_bus->aux_device_wrapper[0]->aux_dev.dev.release = gp_auxiliary_device_release;
aux_bus->aux_device_wrapper[0]->aux_dev.id = retval;
aux_bus->aux_device_wrapper[0]->gp_aux_data.region_start = pci_resource_start(pdev, 0);
aux_bus->aux_device_wrapper[0]->gp_aux_data.region_length = pci_resource_end(pdev, 0);
retval = auxiliary_device_init(&aux_bus->aux_device_wrapper[0]->aux_dev);
if (retval < 0)
goto err_aux_dev_init_0;
retval = auxiliary_device_add(&aux_bus->aux_device_wrapper[0]->aux_dev);
if (retval)
goto err_aux_dev_add_0;
aux_bus->aux_device_wrapper[1] = kzalloc(sizeof(*aux_bus->aux_device_wrapper[1]),
GFP_KERNEL);
if (!aux_bus->aux_device_wrapper[1])
return -ENOMEM;
retval = ida_alloc(&gp_client_ida, GFP_KERNEL);
if (retval < 0)
goto err_ida_alloc_1;
aux_bus->aux_device_wrapper[1]->aux_dev.name = aux_dev_gpio_name;
aux_bus->aux_device_wrapper[1]->aux_dev.dev.parent = &pdev->dev;
aux_bus->aux_device_wrapper[1]->aux_dev.dev.release = gp_auxiliary_device_release;
aux_bus->aux_device_wrapper[1]->aux_dev.id = retval;
aux_bus->aux_device_wrapper[1]->gp_aux_data.region_start = pci_resource_start(pdev, 0);
aux_bus->aux_device_wrapper[1]->gp_aux_data.region_length = pci_resource_end(pdev, 0);
retval = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_ALL_TYPES);
if (retval < 0)
goto err_aux_dev_init_1;
retval = pci_irq_vector(pdev, 0);
if (retval < 0)
goto err_aux_dev_init_1;
pdev->irq = retval;
aux_bus->aux_device_wrapper[1]->gp_aux_data.irq_num = pdev->irq;
retval = auxiliary_device_init(&aux_bus->aux_device_wrapper[1]->aux_dev);
if (retval < 0)
goto err_aux_dev_init_1;
retval = auxiliary_device_add(&aux_bus->aux_device_wrapper[1]->aux_dev);
if (retval)
goto err_aux_dev_add_1;
pci_set_drvdata(pdev, aux_bus);
pci_set_master(pdev);
return 0;
err_aux_dev_add_1:
auxiliary_device_uninit(&aux_bus->aux_device_wrapper[1]->aux_dev);
err_aux_dev_init_1:
ida_free(&gp_client_ida, aux_bus->aux_device_wrapper[1]->aux_dev.id);
err_ida_alloc_1:
kfree(aux_bus->aux_device_wrapper[1]);
err_aux_dev_add_0:
auxiliary_device_uninit(&aux_bus->aux_device_wrapper[0]->aux_dev);
err_aux_dev_init_0:
ida_free(&gp_client_ida, aux_bus->aux_device_wrapper[0]->aux_dev.id);
err_ida_alloc_0:
kfree(aux_bus->aux_device_wrapper[0]);
return retval;
}
static void gp_aux_bus_remove(struct pci_dev *pdev)
{
struct aux_bus_device *aux_bus = pci_get_drvdata(pdev);
auxiliary_device_delete(&aux_bus->aux_device_wrapper[0]->aux_dev);
auxiliary_device_uninit(&aux_bus->aux_device_wrapper[0]->aux_dev);
auxiliary_device_delete(&aux_bus->aux_device_wrapper[1]->aux_dev);
auxiliary_device_uninit(&aux_bus->aux_device_wrapper[1]->aux_dev);
}
static const struct pci_device_id pci1xxxx_tbl[] = {
{ PCI_DEVICE(0x1055, 0xA005) },
{ PCI_DEVICE(0x1055, 0xA015) },
{ PCI_DEVICE(0x1055, 0xA025) },
{ PCI_DEVICE(0x1055, 0xA035) },
{ PCI_DEVICE(0x1055, 0xA045) },
{ PCI_DEVICE(0x1055, 0xA055) },
{0,}
};
MODULE_DEVICE_TABLE(pci, pci1xxxx_tbl);
static struct pci_driver pci1xxxx_gp_driver = {
.name = "PCI1xxxxGP",
.id_table = pci1xxxx_tbl,
.probe = gp_aux_bus_probe,
.remove = gp_aux_bus_remove,
};
module_pci_driver(pci1xxxx_gp_driver);
MODULE_DESCRIPTION("Microchip Technology Inc. PCI1xxxx GP expander");
MODULE_AUTHOR("Kumaravel Thiagarajan <kumaravel.thiagarajan@microchip.com>");
MODULE_LICENSE("GPL");
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