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 */
37 struct stmmac_pci_dmi_data {
38 const char *name;
39 unsigned int func;
40 int phy_addr;
41 };
42
43 struct 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
stmmac_pci_find_phy_addr(struct stmmac_pci_info * info)50 static 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
stmmac_default_data(struct plat_stmmacenet_data * plat)71 static 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 /* TODO: AXI */
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
quark_default_data(struct plat_stmmacenet_data * plat,struct stmmac_pci_info * info)93 static 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->fixed_burst = 1;
119 /* AXI (TODO) */
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
130 static 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
144 static 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 */
stmmac_pci_probe(struct pci_dev * pdev,const struct pci_device_id * id)161 static 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_resources res;
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 memset(&res, 0, sizeof(res));
218 res.addr = pcim_iomap_table(pdev)[i];
219 res.wol_irq = pdev->irq;
220 res.irq = pdev->irq;
221
222 return stmmac_dvr_probe(&pdev->dev, plat, &res);
223 }
224
225 /**
226 * stmmac_pci_remove
227 *
228 * @pdev: platform device pointer
229 * Description: this function calls the main to free the net resources
230 * and releases the PCI resources.
231 */
stmmac_pci_remove(struct pci_dev * pdev)232 static void stmmac_pci_remove(struct pci_dev *pdev)
233 {
234 stmmac_dvr_remove(&pdev->dev);
235 }
236
237 static SIMPLE_DEV_PM_OPS(stmmac_pm_ops, stmmac_suspend, stmmac_resume);
238
239 #define STMMAC_VENDOR_ID 0x700
240 #define STMMAC_QUARK_ID 0x0937
241 #define STMMAC_DEVICE_ID 0x1108
242
243 static const struct pci_device_id stmmac_id_table[] = {
244 {PCI_DEVICE(STMMAC_VENDOR_ID, STMMAC_DEVICE_ID)},
245 {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_MAC)},
246 {PCI_VDEVICE(INTEL, STMMAC_QUARK_ID), (kernel_ulong_t)&quark_pci_info},
247 {}
248 };
249
250 MODULE_DEVICE_TABLE(pci, stmmac_id_table);
251
252 static struct pci_driver stmmac_pci_driver = {
253 .name = STMMAC_RESOURCE_NAME,
254 .id_table = stmmac_id_table,
255 .probe = stmmac_pci_probe,
256 .remove = stmmac_pci_remove,
257 .driver = {
258 .pm = &stmmac_pm_ops,
259 },
260 };
261
262 module_pci_driver(stmmac_pci_driver);
263
264 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PCI driver");
265 MODULE_AUTHOR("Rayagond Kokatanur <rayagond.kokatanur@vayavyalabs.com>");
266 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
267 MODULE_LICENSE("GPL");
268