summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/stmicro/stmmac/stmmac_pci.c
blob: 3bca908716e2a5c52a82ee6e6d8e67b9b10d23c6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
/*******************************************************************************
  This contains the functions to handle the pci driver.

  Copyright (C) 2011-2012  Vayavya Labs Pvt Ltd

  This program is free software; you can redistribute it and/or modify it
  under the terms and conditions of the GNU General Public License,
  version 2, as published by the Free Software Foundation.

  This program is distributed in the hope 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, write to the Free Software Foundation, Inc.,
  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.

  The full GNU General Public License is included in this distribution in
  the file called "COPYING".

  Author: Rayagond Kokatanur <rayagond@vayavyalabs.com>
  Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
*******************************************************************************/

#include <linux/pci.h>
#include <linux/dmi.h>

#include "stmmac.h"

/*
 * This struct is used to associate PCI Function of MAC controller on a board,
 * discovered via DMI, with the address of PHY connected to the MAC. The
 * negative value of the address means that MAC controller is not connected
 * with PHY.
 */
struct stmmac_pci_dmi_data {
	const char *name;
	unsigned int func;
	int phy_addr;
};

struct stmmac_pci_info {
	struct pci_dev *pdev;
	int (*setup)(struct plat_stmmacenet_data *plat,
		     struct stmmac_pci_info *info);
	struct stmmac_pci_dmi_data *dmi;
};

static int stmmac_pci_find_phy_addr(struct stmmac_pci_info *info)
{
	const char *name = dmi_get_system_info(DMI_BOARD_NAME);
	unsigned int func = PCI_FUNC(info->pdev->devfn);
	struct stmmac_pci_dmi_data *dmi;

	/*
	 * Galileo boards with old firmware don't support DMI. We always return
	 * 1 here, so at least first found MAC controller would be probed.
	 */
	if (!name)
		return 1;

	for (dmi = info->dmi; dmi->name && *dmi->name; dmi++) {
		if (!strcmp(dmi->name, name) && dmi->func == func)
			return dmi->phy_addr;
	}

	return -ENODEV;
}

static void stmmac_default_data(struct plat_stmmacenet_data *plat)
{
	plat->bus_id = 1;
	plat->phy_addr = 0;
	plat->interface = PHY_INTERFACE_MODE_GMII;
	plat->clk_csr = 2;	/* clk_csr_i = 20-35MHz & MDC = clk_csr_i/16 */
	plat->has_gmac = 1;
	plat->force_sf_dma_mode = 1;

	plat->mdio_bus_data->phy_reset = NULL;
	plat->mdio_bus_data->phy_mask = 0;

	plat->dma_cfg->pbl = 32;
	plat->dma_cfg->burst_len = DMA_AXI_BLEN_256;

	/* Set default value for multicast hash bins */
	plat->multicast_filter_bins = HASH_TABLE_SIZE;

	/* Set default value for unicast filter entries */
	plat->unicast_filter_entries = 1;
}

static int quark_default_data(struct plat_stmmacenet_data *plat,
			      struct stmmac_pci_info *info)
{
	struct pci_dev *pdev = info->pdev;
	int ret;

	/*
	 * Refuse to load the driver and register net device if MAC controller
	 * does not connect to any PHY interface.
	 */
	ret = stmmac_pci_find_phy_addr(info);
	if (ret < 0)
		return ret;

	plat->bus_id = PCI_DEVID(pdev->bus->number, pdev->devfn);
	plat->phy_addr = ret;
	plat->interface = PHY_INTERFACE_MODE_RMII;
	plat->clk_csr = 2;
	plat->has_gmac = 1;
	plat->force_sf_dma_mode = 1;

	plat->mdio_bus_data->phy_reset = NULL;
	plat->mdio_bus_data->phy_mask = 0;

	plat->dma_cfg->pbl = 16;
	plat->dma_cfg->burst_len = DMA_AXI_BLEN_256;
	plat->dma_cfg->fixed_burst = 1;

	/* Set default value for multicast hash bins */
	plat->multicast_filter_bins = HASH_TABLE_SIZE;

	/* Set default value for unicast filter entries */
	plat->unicast_filter_entries = 1;

	return 0;
}

static struct stmmac_pci_dmi_data quark_pci_dmi_data[] = {
	{
		.name = "Galileo",
		.func = 6,
		.phy_addr = 1,
	},
	{
		.name = "GalileoGen2",
		.func = 6,
		.phy_addr = 1,
	},
	{}
};

static struct stmmac_pci_info quark_pci_info = {
	.setup = quark_default_data,
	.dmi = quark_pci_dmi_data,
};

/**
 * stmmac_pci_probe
 *
 * @pdev: pci device pointer
 * @id: pointer to table of device id/id's.
 *
 * Description: This probing function gets called for all PCI devices which
 * match the ID table and are not "owned" by other driver yet. This function
 * gets passed a "struct pci_dev *" for each device whose entry in the ID table
 * matches the device. The probe functions returns zero when the driver choose
 * to take "ownership" of the device or an error code(-ve no) otherwise.
 */
static int stmmac_pci_probe(struct pci_dev *pdev,
			    const struct pci_device_id *id)
{
	struct stmmac_pci_info *info = (struct stmmac_pci_info *)id->driver_data;
	struct plat_stmmacenet_data *plat;
	struct stmmac_priv *priv;
	int i;
	int ret;

	plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL);
	if (!plat)
		return -ENOMEM;

	plat->mdio_bus_data = devm_kzalloc(&pdev->dev,
					   sizeof(*plat->mdio_bus_data),
					   GFP_KERNEL);
	if (!plat->mdio_bus_data)
		return -ENOMEM;

	plat->dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*plat->dma_cfg),
				     GFP_KERNEL);
	if (!plat->dma_cfg)
		return -ENOMEM;

	/* Enable pci device */
	ret = pcim_enable_device(pdev);
	if (ret) {
		dev_err(&pdev->dev, "%s: ERROR: failed to enable device\n",
			__func__);
		return ret;
	}

	/* Get the base address of device */
	for (i = 0; i <= PCI_STD_RESOURCE_END; i++) {
		if (pci_resource_len(pdev, i) == 0)
			continue;
		ret = pcim_iomap_regions(pdev, BIT(i), pci_name(pdev));
		if (ret)
			return ret;
		break;
	}

	pci_set_master(pdev);

	if (info) {
		info->pdev = pdev;
		if (info->setup) {
			ret = info->setup(plat, info);
			if (ret)
				return ret;
		}
	} else
		stmmac_default_data(plat);

	pci_enable_msi(pdev);

	priv = stmmac_dvr_probe(&pdev->dev, plat, pcim_iomap_table(pdev)[i]);
	if (IS_ERR(priv)) {
		dev_err(&pdev->dev, "%s: main driver probe failed\n", __func__);
		return PTR_ERR(priv);
	}
	priv->dev->irq = pdev->irq;
	priv->wol_irq = pdev->irq;

	pci_set_drvdata(pdev, priv->dev);

	dev_dbg(&pdev->dev, "STMMAC PCI driver registration completed\n");

	return 0;
}

/**
 * stmmac_pci_remove
 *
 * @pdev: platform device pointer
 * Description: this function calls the main to free the net resources
 * and releases the PCI resources.
 */
static void stmmac_pci_remove(struct pci_dev *pdev)
{
	struct net_device *ndev = pci_get_drvdata(pdev);

	stmmac_dvr_remove(ndev);
}

#ifdef CONFIG_PM_SLEEP
static int stmmac_pci_suspend(struct device *dev)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	struct net_device *ndev = pci_get_drvdata(pdev);

	return stmmac_suspend(ndev);
}

static int stmmac_pci_resume(struct device *dev)
{
	struct pci_dev *pdev = to_pci_dev(dev);
	struct net_device *ndev = pci_get_drvdata(pdev);

	return stmmac_resume(ndev);
}
#endif

static SIMPLE_DEV_PM_OPS(stmmac_pm_ops, stmmac_pci_suspend, stmmac_pci_resume);

#define STMMAC_VENDOR_ID 0x700
#define STMMAC_QUARK_ID  0x0937
#define STMMAC_DEVICE_ID 0x1108

static const struct pci_device_id stmmac_id_table[] = {
	{PCI_DEVICE(STMMAC_VENDOR_ID, STMMAC_DEVICE_ID)},
	{PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_MAC)},
	{PCI_VDEVICE(INTEL, STMMAC_QUARK_ID), (kernel_ulong_t)&quark_pci_info},
	{}
};

MODULE_DEVICE_TABLE(pci, stmmac_id_table);

static struct pci_driver stmmac_pci_driver = {
	.name = STMMAC_RESOURCE_NAME,
	.id_table = stmmac_id_table,
	.probe = stmmac_pci_probe,
	.remove = stmmac_pci_remove,
	.driver         = {
		.pm     = &stmmac_pm_ops,
	},
};

module_pci_driver(stmmac_pci_driver);

MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PCI driver");
MODULE_AUTHOR("Rayagond Kokatanur <rayagond.kokatanur@vayavyalabs.com>");
MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
MODULE_LICENSE("GPL");