1/**
  2 * Cadence GEM PCI wrapper.
  3 *
  4 * Copyright (C) 2016 Cadence Design Systems - http://www.cadence.com
  5 *
  6 * Authors: Rafal Ozieblo <rafalo@cadence.com>
  7 *	    Bartosz Folta <bfolta@cadence.com>
  8 *
  9 * This program is free software: you can redistribute it and/or modify
 10 * it under the terms of the GNU General Public License version 2  of
 11 * the License as published by the Free Software Foundation.
 12 *
 13 * This program is distributed in the hope that it will be useful,
 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 16 * GNU General Public License for more details.
 17 *
 18 * You should have received a copy of the GNU General Public License
 19 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 20 */
 21
 22#include <linux/clk.h>
 23#include <linux/clk-provider.h>
 24#include <linux/etherdevice.h>
 25#include <linux/module.h>
 26#include <linux/pci.h>
 27#include <linux/platform_data/macb.h>
 28#include <linux/platform_device.h>
 29#include "macb.h"
 30
 31#define PCI_DRIVER_NAME "macb_pci"
 32#define PLAT_DRIVER_NAME "macb"
 33
 34#define CDNS_VENDOR_ID 0x17cd
 35#define CDNS_DEVICE_ID 0xe007
 36
 37#define GEM_PCLK_RATE 50000000
 38#define GEM_HCLK_RATE 50000000
 39
 40static int macb_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 41{
 42	int err;
 43	struct platform_device *plat_dev;
 44	struct platform_device_info plat_info;
 45	struct macb_platform_data plat_data;
 46	struct resource res[2];
 47
 48	/* enable pci device */
 49	err = pcim_enable_device(pdev);
 50	if (err < 0) {
 51		dev_err(&pdev->dev, "Enabling PCI device has failed: %d", err);
 52		return err;
 53	}
 54
 55	pci_set_master(pdev);
 56
 57	/* set up resources */
 58	memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
 59	res[0].start = pci_resource_start(pdev, 0);
 60	res[0].end = pci_resource_end(pdev, 0);
 61	res[0].name = PCI_DRIVER_NAME;
 62	res[0].flags = IORESOURCE_MEM;
 63	res[1].start = pci_irq_vector(pdev, 0);
 64	res[1].name = PCI_DRIVER_NAME;
 65	res[1].flags = IORESOURCE_IRQ;
 66
 67	dev_info(&pdev->dev, "EMAC physical base addr: %pa\n",
 68		 &res[0].start);
 69
 70	/* set up macb platform data */
 71	memset(&plat_data, 0, sizeof(plat_data));
 72
 73	/* initialize clocks */
 74	plat_data.pclk = clk_register_fixed_rate(&pdev->dev, "pclk", NULL, 0,
 75						 GEM_PCLK_RATE);
 76	if (IS_ERR(plat_data.pclk)) {
 77		err = PTR_ERR(plat_data.pclk);
 78		goto err_pclk_register;
 79	}
 80
 81	plat_data.hclk = clk_register_fixed_rate(&pdev->dev, "hclk", NULL, 0,
 82						 GEM_HCLK_RATE);
 83	if (IS_ERR(plat_data.hclk)) {
 84		err = PTR_ERR(plat_data.hclk);
 85		goto err_hclk_register;
 86	}
 87
 88	/* set up platform device info */
 89	memset(&plat_info, 0, sizeof(plat_info));
 90	plat_info.parent = &pdev->dev;
 91	plat_info.fwnode = pdev->dev.fwnode;
 92	plat_info.name = PLAT_DRIVER_NAME;
 93	plat_info.id = pdev->devfn;
 94	plat_info.res = res;
 95	plat_info.num_res = ARRAY_SIZE(res);
 96	plat_info.data = &plat_data;
 97	plat_info.size_data = sizeof(plat_data);
 98	plat_info.dma_mask = pdev->dma_mask;
 99
100	/* register platform device */
101	plat_dev = platform_device_register_full(&plat_info);
102	if (IS_ERR(plat_dev)) {
103		err = PTR_ERR(plat_dev);
104		goto err_plat_dev_register;
105	}
106
107	pci_set_drvdata(pdev, plat_dev);
108
109	return 0;
110
111err_plat_dev_register:
112	clk_unregister(plat_data.hclk);
113
114err_hclk_register:
115	clk_unregister(plat_data.pclk);
116
117err_pclk_register:
118	return err;
119}
120
121static void macb_remove(struct pci_dev *pdev)
122{
123	struct platform_device *plat_dev = pci_get_drvdata(pdev);
124	struct macb_platform_data *plat_data = dev_get_platdata(&plat_dev->dev);
125
126	platform_device_unregister(plat_dev);
127	clk_unregister(plat_data->pclk);
128	clk_unregister(plat_data->hclk);
129}
130
131static struct pci_device_id dev_id_table[] = {
132	{ PCI_DEVICE(CDNS_VENDOR_ID, CDNS_DEVICE_ID), },
133	{ 0, }
134};
135
136static struct pci_driver macb_pci_driver = {
137	.name     = PCI_DRIVER_NAME,
138	.id_table = dev_id_table,
139	.probe    = macb_probe,
140	.remove	  = macb_remove,
141};
142
143module_pci_driver(macb_pci_driver);
144MODULE_DEVICE_TABLE(pci, dev_id_table);
145MODULE_LICENSE("GPL");
146MODULE_DESCRIPTION("Cadence NIC PCI wrapper");