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/**
* macb_pci.c - Cadence GEM PCI wrapper.
*
* Copyright (C) 2016 Cadence Design Systems - http://www.cadence.com
*
* Authors: Rafal Ozieblo <rafalo@cadence.com>
* Bartosz Folta <bfolta@cadence.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 of
* the License 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, see <http://www.gnu.org/licenses/>.
*/
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/etherdevice.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/platform_data/macb.h>
#include <linux/platform_device.h>
#include "macb.h"
#define PCI_DRIVER_NAME "macb_pci"
#define PLAT_DRIVER_NAME "macb"
#define CDNS_VENDOR_ID 0x17cd
#define CDNS_DEVICE_ID 0xe007
#define GEM_PCLK_RATE 50000000
#define GEM_HCLK_RATE 50000000
static int macb_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
int err;
struct platform_device *plat_dev;
struct platform_device_info plat_info;
struct macb_platform_data plat_data;
struct resource res[2];
/* sanity check */
if (!id)
return -EINVAL;
/* enable pci device */
err = pci_enable_device(pdev);
if (err < 0) {
dev_err(&pdev->dev, "Enabling PCI device has failed: 0x%04X",
err);
return -EACCES;
}
pci_set_master(pdev);
/* set up resources */
memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
res[0].start = pdev->resource[0].start;
res[0].end = pdev->resource[0].end;
res[0].name = PCI_DRIVER_NAME;
res[0].flags = IORESOURCE_MEM;
res[1].start = pdev->irq;
res[1].name = PCI_DRIVER_NAME;
res[1].flags = IORESOURCE_IRQ;
dev_info(&pdev->dev, "EMAC physical base addr = 0x%p\n",
(void *)(uintptr_t)pci_resource_start(pdev, 0));
/* set up macb platform data */
memset(&plat_data, 0, sizeof(plat_data));
/* initialize clocks */
plat_data.pclk = clk_register_fixed_rate(&pdev->dev, "pclk", NULL, 0,
GEM_PCLK_RATE);
if (IS_ERR(plat_data.pclk)) {
err = PTR_ERR(plat_data.pclk);
goto err_pclk_register;
}
plat_data.hclk = clk_register_fixed_rate(&pdev->dev, "hclk", NULL, 0,
GEM_HCLK_RATE);
if (IS_ERR(plat_data.hclk)) {
err = PTR_ERR(plat_data.hclk);
goto err_hclk_register;
}
/* set up platform device info */
memset(&plat_info, 0, sizeof(plat_info));
plat_info.parent = &pdev->dev;
plat_info.fwnode = pdev->dev.fwnode;
plat_info.name = PLAT_DRIVER_NAME;
plat_info.id = pdev->devfn;
plat_info.res = res;
plat_info.num_res = ARRAY_SIZE(res);
plat_info.data = &plat_data;
plat_info.size_data = sizeof(plat_data);
plat_info.dma_mask = DMA_BIT_MASK(32);
/* register platform device */
plat_dev = platform_device_register_full(&plat_info);
if (IS_ERR(plat_dev)) {
err = PTR_ERR(plat_dev);
goto err_plat_dev_register;
}
pci_set_drvdata(pdev, plat_dev);
return 0;
err_plat_dev_register:
clk_unregister(plat_data.hclk);
err_hclk_register:
clk_unregister(plat_data.pclk);
err_pclk_register:
pci_disable_device(pdev);
return err;
}
static void macb_remove(struct pci_dev *pdev)
{
struct platform_device *plat_dev = pci_get_drvdata(pdev);
struct macb_platform_data *plat_data = dev_get_platdata(&plat_dev->dev);
platform_device_unregister(plat_dev);
pci_disable_device(pdev);
clk_unregister(plat_data->pclk);
clk_unregister(plat_data->hclk);
}
static struct pci_device_id dev_id_table[] = {
{ PCI_DEVICE(CDNS_VENDOR_ID, CDNS_DEVICE_ID), },
{ 0, }
};
static struct pci_driver macb_pci_driver = {
.name = PCI_DRIVER_NAME,
.id_table = dev_id_table,
.probe = macb_probe,
.remove = macb_remove,
};
module_pci_driver(macb_pci_driver);
MODULE_DEVICE_TABLE(pci, dev_id_table);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Cadence NIC PCI wrapper");
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