1/*******************************************************************************
2  This contains the functions to handle the pci driver.
3
4  Copyright (C) 2011-2012  Vayavya Labs Pvt Ltd
5
6  This program is free software; you can redistribute it and/or modify it
7  under the terms and conditions of the GNU General Public License,
8  version 2, as published by the Free Software Foundation.
9
10  This program is distributed in the hope it will be useful, but WITHOUT
11  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
13  more details.
14
15  You should have received a copy of the GNU General Public License along with
16  this program; if not, write to the Free Software Foundation, Inc.,
17  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
18
19  The full GNU General Public License is included in this distribution in
20  the file called "COPYING".
21
22  Author: Rayagond Kokatanur <rayagond@vayavyalabs.com>
23  Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
24*******************************************************************************/
25
26#include <linux/pci.h>
27#include <linux/dmi.h>
28
29#include "stmmac.h"
30
31/*
32 * This struct is used to associate PCI Function of MAC controller on a board,
33 * discovered via DMI, with the address of PHY connected to the MAC. The
34 * negative value of the address means that MAC controller is not connected
35 * with PHY.
36 */
37struct stmmac_pci_dmi_data {
38	const char *name;
39	unsigned int func;
40	int phy_addr;
41};
42
43struct stmmac_pci_info {
44	struct pci_dev *pdev;
45	int (*setup)(struct plat_stmmacenet_data *plat,
46		     struct stmmac_pci_info *info);
47	struct stmmac_pci_dmi_data *dmi;
48};
49
50static int stmmac_pci_find_phy_addr(struct stmmac_pci_info *info)
51{
52	const char *name = dmi_get_system_info(DMI_BOARD_NAME);
53	unsigned int func = PCI_FUNC(info->pdev->devfn);
54	struct stmmac_pci_dmi_data *dmi;
55
56	/*
57	 * Galileo boards with old firmware don't support DMI. We always return
58	 * 1 here, so at least first found MAC controller would be probed.
59	 */
60	if (!name)
61		return 1;
62
63	for (dmi = info->dmi; dmi->name && *dmi->name; dmi++) {
64		if (!strcmp(dmi->name, name) && dmi->func == func)
65			return dmi->phy_addr;
66	}
67
68	return -ENODEV;
69}
70
71static void stmmac_default_data(struct plat_stmmacenet_data *plat)
72{
73	plat->bus_id = 1;
74	plat->phy_addr = 0;
75	plat->interface = PHY_INTERFACE_MODE_GMII;
76	plat->clk_csr = 2;	/* clk_csr_i = 20-35MHz & MDC = clk_csr_i/16 */
77	plat->has_gmac = 1;
78	plat->force_sf_dma_mode = 1;
79
80	plat->mdio_bus_data->phy_reset = NULL;
81	plat->mdio_bus_data->phy_mask = 0;
82
83	plat->dma_cfg->pbl = 32;
84	plat->dma_cfg->burst_len = DMA_AXI_BLEN_256;
85
86	/* Set default value for multicast hash bins */
87	plat->multicast_filter_bins = HASH_TABLE_SIZE;
88
89	/* Set default value for unicast filter entries */
90	plat->unicast_filter_entries = 1;
91}
92
93static int quark_default_data(struct plat_stmmacenet_data *plat,
94			      struct stmmac_pci_info *info)
95{
96	struct pci_dev *pdev = info->pdev;
97	int ret;
98
99	/*
100	 * Refuse to load the driver and register net device if MAC controller
101	 * does not connect to any PHY interface.
102	 */
103	ret = stmmac_pci_find_phy_addr(info);
104	if (ret < 0)
105		return ret;
106
107	plat->bus_id = PCI_DEVID(pdev->bus->number, pdev->devfn);
108	plat->phy_addr = ret;
109	plat->interface = PHY_INTERFACE_MODE_RMII;
110	plat->clk_csr = 2;
111	plat->has_gmac = 1;
112	plat->force_sf_dma_mode = 1;
113
114	plat->mdio_bus_data->phy_reset = NULL;
115	plat->mdio_bus_data->phy_mask = 0;
116
117	plat->dma_cfg->pbl = 16;
118	plat->dma_cfg->burst_len = DMA_AXI_BLEN_256;
119	plat->dma_cfg->fixed_burst = 1;
120
121	/* Set default value for multicast hash bins */
122	plat->multicast_filter_bins = HASH_TABLE_SIZE;
123
124	/* Set default value for unicast filter entries */
125	plat->unicast_filter_entries = 1;
126
127	return 0;
128}
129
130static struct stmmac_pci_dmi_data quark_pci_dmi_data[] = {
131	{
132		.name = "Galileo",
133		.func = 6,
134		.phy_addr = 1,
135	},
136	{
137		.name = "GalileoGen2",
138		.func = 6,
139		.phy_addr = 1,
140	},
141	{}
142};
143
144static struct stmmac_pci_info quark_pci_info = {
145	.setup = quark_default_data,
146	.dmi = quark_pci_dmi_data,
147};
148
149/**
150 * stmmac_pci_probe
151 *
152 * @pdev: pci device pointer
153 * @id: pointer to table of device id/id's.
154 *
155 * Description: This probing function gets called for all PCI devices which
156 * match the ID table and are not "owned" by other driver yet. This function
157 * gets passed a "struct pci_dev *" for each device whose entry in the ID table
158 * matches the device. The probe functions returns zero when the driver choose
159 * to take "ownership" of the device or an error code(-ve no) otherwise.
160 */
161static int stmmac_pci_probe(struct pci_dev *pdev,
162			    const struct pci_device_id *id)
163{
164	struct stmmac_pci_info *info = (struct stmmac_pci_info *)id->driver_data;
165	struct plat_stmmacenet_data *plat;
166	struct stmmac_priv *priv;
167	int i;
168	int ret;
169
170	plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL);
171	if (!plat)
172		return -ENOMEM;
173
174	plat->mdio_bus_data = devm_kzalloc(&pdev->dev,
175					   sizeof(*plat->mdio_bus_data),
176					   GFP_KERNEL);
177	if (!plat->mdio_bus_data)
178		return -ENOMEM;
179
180	plat->dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*plat->dma_cfg),
181				     GFP_KERNEL);
182	if (!plat->dma_cfg)
183		return -ENOMEM;
184
185	/* Enable pci device */
186	ret = pcim_enable_device(pdev);
187	if (ret) {
188		dev_err(&pdev->dev, "%s: ERROR: failed to enable device\n",
189			__func__);
190		return ret;
191	}
192
193	/* Get the base address of device */
194	for (i = 0; i <= PCI_STD_RESOURCE_END; i++) {
195		if (pci_resource_len(pdev, i) == 0)
196			continue;
197		ret = pcim_iomap_regions(pdev, BIT(i), pci_name(pdev));
198		if (ret)
199			return ret;
200		break;
201	}
202
203	pci_set_master(pdev);
204
205	if (info) {
206		info->pdev = pdev;
207		if (info->setup) {
208			ret = info->setup(plat, info);
209			if (ret)
210				return ret;
211		}
212	} else
213		stmmac_default_data(plat);
214
215	pci_enable_msi(pdev);
216
217	priv = stmmac_dvr_probe(&pdev->dev, plat, pcim_iomap_table(pdev)[i]);
218	if (IS_ERR(priv)) {
219		dev_err(&pdev->dev, "%s: main driver probe failed\n", __func__);
220		return PTR_ERR(priv);
221	}
222	priv->dev->irq = pdev->irq;
223	priv->wol_irq = pdev->irq;
224
225	pci_set_drvdata(pdev, priv->dev);
226
227	dev_dbg(&pdev->dev, "STMMAC PCI driver registration completed\n");
228
229	return 0;
230}
231
232/**
233 * stmmac_pci_remove
234 *
235 * @pdev: platform device pointer
236 * Description: this function calls the main to free the net resources
237 * and releases the PCI resources.
238 */
239static void stmmac_pci_remove(struct pci_dev *pdev)
240{
241	struct net_device *ndev = pci_get_drvdata(pdev);
242
243	stmmac_dvr_remove(ndev);
244}
245
246#ifdef CONFIG_PM_SLEEP
247static int stmmac_pci_suspend(struct device *dev)
248{
249	struct pci_dev *pdev = to_pci_dev(dev);
250	struct net_device *ndev = pci_get_drvdata(pdev);
251
252	return stmmac_suspend(ndev);
253}
254
255static int stmmac_pci_resume(struct device *dev)
256{
257	struct pci_dev *pdev = to_pci_dev(dev);
258	struct net_device *ndev = pci_get_drvdata(pdev);
259
260	return stmmac_resume(ndev);
261}
262#endif
263
264static SIMPLE_DEV_PM_OPS(stmmac_pm_ops, stmmac_pci_suspend, stmmac_pci_resume);
265
266#define STMMAC_VENDOR_ID 0x700
267#define STMMAC_QUARK_ID  0x0937
268#define STMMAC_DEVICE_ID 0x1108
269
270static const struct pci_device_id stmmac_id_table[] = {
271	{PCI_DEVICE(STMMAC_VENDOR_ID, STMMAC_DEVICE_ID)},
272	{PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_MAC)},
273	{PCI_VDEVICE(INTEL, STMMAC_QUARK_ID), (kernel_ulong_t)&quark_pci_info},
274	{}
275};
276
277MODULE_DEVICE_TABLE(pci, stmmac_id_table);
278
279static struct pci_driver stmmac_pci_driver = {
280	.name = STMMAC_RESOURCE_NAME,
281	.id_table = stmmac_id_table,
282	.probe = stmmac_pci_probe,
283	.remove = stmmac_pci_remove,
284	.driver         = {
285		.pm     = &stmmac_pm_ops,
286	},
287};
288
289module_pci_driver(stmmac_pci_driver);
290
291MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PCI driver");
292MODULE_AUTHOR("Rayagond Kokatanur <rayagond.kokatanur@vayavyalabs.com>");
293MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
294MODULE_LICENSE("GPL");
295