1// SPDX-License-Identifier: GPL-2.0-only
2/*******************************************************************************
3  This contains the functions to handle the pci driver.
4
5  Copyright (C) 2011-2012  Vayavya Labs Pvt Ltd
6
7
8  Author: Rayagond Kokatanur <rayagond@vayavyalabs.com>
9  Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
10*******************************************************************************/
11
12#include <linux/clk-provider.h>
13#include <linux/pci.h>
14#include <linux/dmi.h>
15
16#include "stmmac.h"
17
18struct stmmac_pci_info {
19	int (*setup)(struct pci_dev *pdev, struct plat_stmmacenet_data *plat);
20};
21
22static void common_default_data(struct plat_stmmacenet_data *plat)
23{
24	plat->clk_csr = 2;	/* clk_csr_i = 20-35MHz & MDC = clk_csr_i/16 */
25	plat->has_gmac = 1;
26	plat->force_sf_dma_mode = 1;
27
28	plat->mdio_bus_data->needs_reset = true;
29
30	/* Set default value for multicast hash bins */
31	plat->multicast_filter_bins = HASH_TABLE_SIZE;
32
33	/* Set default value for unicast filter entries */
34	plat->unicast_filter_entries = 1;
35
36	/* Set the maxmtu to a default of JUMBO_LEN */
37	plat->maxmtu = JUMBO_LEN;
38
39	/* Set default number of RX and TX queues to use */
40	plat->tx_queues_to_use = 1;
41	plat->rx_queues_to_use = 1;
42
43	/* Disable Priority config by default */
44	plat->tx_queues_cfg[0].use_prio = false;
45	plat->rx_queues_cfg[0].use_prio = false;
46
47	/* Disable RX queues routing by default */
48	plat->rx_queues_cfg[0].pkt_route = 0x0;
49}
50
51static int stmmac_default_data(struct pci_dev *pdev,
52			       struct plat_stmmacenet_data *plat)
53{
54	/* Set common default data first */
55	common_default_data(plat);
56
57	plat->bus_id = 1;
58	plat->phy_addr = 0;
59	plat->phy_interface = PHY_INTERFACE_MODE_GMII;
60
61	plat->dma_cfg->pbl = 32;
62	plat->dma_cfg->pblx8 = true;
63	/* TODO: AXI */
64
65	return 0;
66}
67
68static const struct stmmac_pci_info stmmac_pci_info = {
69	.setup = stmmac_default_data,
70};
71
72static int snps_gmac5_default_data(struct pci_dev *pdev,
73				   struct plat_stmmacenet_data *plat)
74{
75	int i;
76
77	plat->clk_csr = 5;
78	plat->has_gmac4 = 1;
79	plat->force_sf_dma_mode = 1;
80	plat->flags |= STMMAC_FLAG_TSO_EN;
81	plat->pmt = 1;
82
83	/* Set default value for multicast hash bins */
84	plat->multicast_filter_bins = HASH_TABLE_SIZE;
85
86	/* Set default value for unicast filter entries */
87	plat->unicast_filter_entries = 1;
88
89	/* Set the maxmtu to a default of JUMBO_LEN */
90	plat->maxmtu = JUMBO_LEN;
91
92	/* Set default number of RX and TX queues to use */
93	plat->tx_queues_to_use = 4;
94	plat->rx_queues_to_use = 4;
95
96	plat->tx_sched_algorithm = MTL_TX_ALGORITHM_WRR;
97	for (i = 0; i < plat->tx_queues_to_use; i++) {
98		plat->tx_queues_cfg[i].use_prio = false;
99		plat->tx_queues_cfg[i].mode_to_use = MTL_QUEUE_DCB;
100		plat->tx_queues_cfg[i].weight = 25;
101		if (i > 0)
102			plat->tx_queues_cfg[i].tbs_en = 1;
103	}
104
105	plat->rx_sched_algorithm = MTL_RX_ALGORITHM_SP;
106	for (i = 0; i < plat->rx_queues_to_use; i++) {
107		plat->rx_queues_cfg[i].use_prio = false;
108		plat->rx_queues_cfg[i].mode_to_use = MTL_QUEUE_DCB;
109		plat->rx_queues_cfg[i].pkt_route = 0x0;
110		plat->rx_queues_cfg[i].chan = i;
111	}
112
113	plat->bus_id = 1;
114	plat->phy_addr = -1;
115	plat->phy_interface = PHY_INTERFACE_MODE_GMII;
116
117	plat->dma_cfg->pbl = 32;
118	plat->dma_cfg->pblx8 = true;
119
120	/* Axi Configuration */
121	plat->axi = devm_kzalloc(&pdev->dev, sizeof(*plat->axi), GFP_KERNEL);
122	if (!plat->axi)
123		return -ENOMEM;
124
125	plat->axi->axi_wr_osr_lmt = 31;
126	plat->axi->axi_rd_osr_lmt = 31;
127
128	plat->axi->axi_fb = false;
129	plat->axi->axi_blen[0] = 4;
130	plat->axi->axi_blen[1] = 8;
131	plat->axi->axi_blen[2] = 16;
132	plat->axi->axi_blen[3] = 32;
133
134	return 0;
135}
136
137static const struct stmmac_pci_info snps_gmac5_pci_info = {
138	.setup = snps_gmac5_default_data,
139};
140
141/**
142 * stmmac_pci_probe
143 *
144 * @pdev: pci device pointer
145 * @id: pointer to table of device id/id's.
146 *
147 * Description: This probing function gets called for all PCI devices which
148 * match the ID table and are not "owned" by other driver yet. This function
149 * gets passed a "struct pci_dev *" for each device whose entry in the ID table
150 * matches the device. The probe functions returns zero when the driver choose
151 * to take "ownership" of the device or an error code(-ve no) otherwise.
152 */
153static int stmmac_pci_probe(struct pci_dev *pdev,
154			    const struct pci_device_id *id)
155{
156	struct stmmac_pci_info *info = (struct stmmac_pci_info *)id->driver_data;
157	struct plat_stmmacenet_data *plat;
158	struct stmmac_resources res;
159	int i;
160	int ret;
161
162	plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL);
163	if (!plat)
164		return -ENOMEM;
165
166	plat->mdio_bus_data = devm_kzalloc(&pdev->dev,
167					   sizeof(*plat->mdio_bus_data),
168					   GFP_KERNEL);
169	if (!plat->mdio_bus_data)
170		return -ENOMEM;
171
172	plat->dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*plat->dma_cfg),
173				     GFP_KERNEL);
174	if (!plat->dma_cfg)
175		return -ENOMEM;
176
177	plat->safety_feat_cfg = devm_kzalloc(&pdev->dev,
178					     sizeof(*plat->safety_feat_cfg),
179					     GFP_KERNEL);
180	if (!plat->safety_feat_cfg)
181		return -ENOMEM;
182
183	/* Enable pci device */
184	ret = pcim_enable_device(pdev);
185	if (ret) {
186		dev_err(&pdev->dev, "%s: ERROR: failed to enable device\n",
187			__func__);
188		return ret;
189	}
190
191	/* Get the base address of device */
192	for (i = 0; i < PCI_STD_NUM_BARS; i++) {
193		if (pci_resource_len(pdev, i) == 0)
194			continue;
195		ret = pcim_iomap_regions(pdev, BIT(i), pci_name(pdev));
196		if (ret)
197			return ret;
198		break;
199	}
200
201	pci_set_master(pdev);
202
203	ret = info->setup(pdev, plat);
204	if (ret)
205		return ret;
206
207	memset(&res, 0, sizeof(res));
208	res.addr = pcim_iomap_table(pdev)[i];
209	res.wol_irq = pdev->irq;
210	res.irq = pdev->irq;
211
212	plat->safety_feat_cfg->tsoee = 1;
213	plat->safety_feat_cfg->mrxpee = 1;
214	plat->safety_feat_cfg->mestee = 1;
215	plat->safety_feat_cfg->mrxee = 1;
216	plat->safety_feat_cfg->mtxee = 1;
217	plat->safety_feat_cfg->epsi = 1;
218	plat->safety_feat_cfg->edpp = 1;
219	plat->safety_feat_cfg->prtyen = 1;
220	plat->safety_feat_cfg->tmouten = 1;
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 */
232static void stmmac_pci_remove(struct pci_dev *pdev)
233{
234	int i;
235
236	stmmac_dvr_remove(&pdev->dev);
237
238	for (i = 0; i < PCI_STD_NUM_BARS; i++) {
239		if (pci_resource_len(pdev, i) == 0)
240			continue;
241		pcim_iounmap_regions(pdev, BIT(i));
242		break;
243	}
244}
245
246static int __maybe_unused stmmac_pci_suspend(struct device *dev)
247{
248	struct pci_dev *pdev = to_pci_dev(dev);
249	int ret;
250
251	ret = stmmac_suspend(dev);
252	if (ret)
253		return ret;
254
255	ret = pci_save_state(pdev);
256	if (ret)
257		return ret;
258
259	pci_disable_device(pdev);
260	pci_wake_from_d3(pdev, true);
261	return 0;
262}
263
264static int __maybe_unused stmmac_pci_resume(struct device *dev)
265{
266	struct pci_dev *pdev = to_pci_dev(dev);
267	int ret;
268
269	pci_restore_state(pdev);
270	pci_set_power_state(pdev, PCI_D0);
271
272	ret = pci_enable_device(pdev);
273	if (ret)
274		return ret;
275
276	pci_set_master(pdev);
277
278	return stmmac_resume(dev);
279}
280
281static SIMPLE_DEV_PM_OPS(stmmac_pm_ops, stmmac_pci_suspend, stmmac_pci_resume);
282
283/* synthetic ID, no official vendor */
284#define PCI_VENDOR_ID_STMMAC		0x0700
285
286#define PCI_DEVICE_ID_STMMAC_STMMAC		0x1108
287#define PCI_DEVICE_ID_SYNOPSYS_GMAC5_ID		0x7102
288
289static const struct pci_device_id stmmac_id_table[] = {
290	{ PCI_DEVICE_DATA(STMMAC, STMMAC, &stmmac_pci_info) },
291	{ PCI_DEVICE_DATA(STMICRO, MAC, &stmmac_pci_info) },
292	{ PCI_DEVICE_DATA(SYNOPSYS, GMAC5_ID, &snps_gmac5_pci_info) },
293	{}
294};
295
296MODULE_DEVICE_TABLE(pci, stmmac_id_table);
297
298static struct pci_driver stmmac_pci_driver = {
299	.name = STMMAC_RESOURCE_NAME,
300	.id_table = stmmac_id_table,
301	.probe = stmmac_pci_probe,
302	.remove = stmmac_pci_remove,
303	.driver         = {
304		.pm     = &stmmac_pm_ops,
305	},
306};
307
308module_pci_driver(stmmac_pci_driver);
309
310MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet PCI driver");
311MODULE_AUTHOR("Rayagond Kokatanur <rayagond.kokatanur@vayavyalabs.com>");
312MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
313MODULE_LICENSE("GPL");
314