Merge tag '6.6-rc-smb3-client-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6
[sfrench/cifs-2.6.git] / drivers / net / ethernet / stmicro / stmmac / stmmac_platform.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*******************************************************************************
3   This contains the functions to handle the platform driver.
4
5   Copyright (C) 2007-2011  STMicroelectronics Ltd
6
7
8   Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
9 *******************************************************************************/
10
11 #include <linux/device.h>
12 #include <linux/platform_device.h>
13 #include <linux/pm_runtime.h>
14 #include <linux/module.h>
15 #include <linux/io.h>
16 #include <linux/of.h>
17 #include <linux/of_net.h>
18 #include <linux/of_mdio.h>
19
20 #include "stmmac.h"
21 #include "stmmac_platform.h"
22
23 #ifdef CONFIG_OF
24
25 /**
26  * dwmac1000_validate_mcast_bins - validates the number of Multicast filter bins
27  * @dev: struct device of the platform device
28  * @mcast_bins: Multicast filtering bins
29  * Description:
30  * this function validates the number of Multicast filtering bins specified
31  * by the configuration through the device tree. The Synopsys GMAC supports
32  * 64 bins, 128 bins, or 256 bins. "bins" refer to the division of CRC
33  * number space. 64 bins correspond to 6 bits of the CRC, 128 corresponds
34  * to 7 bits, and 256 refers to 8 bits of the CRC. Any other setting is
35  * invalid and will cause the filtering algorithm to use Multicast
36  * promiscuous mode.
37  */
38 static int dwmac1000_validate_mcast_bins(struct device *dev, int mcast_bins)
39 {
40         int x = mcast_bins;
41
42         switch (x) {
43         case HASH_TABLE_SIZE:
44         case 128:
45         case 256:
46                 break;
47         default:
48                 x = 0;
49                 dev_info(dev, "Hash table entries set to unexpected value %d\n",
50                          mcast_bins);
51                 break;
52         }
53         return x;
54 }
55
56 /**
57  * dwmac1000_validate_ucast_entries - validate the Unicast address entries
58  * @dev: struct device of the platform device
59  * @ucast_entries: number of Unicast address entries
60  * Description:
61  * This function validates the number of Unicast address entries supported
62  * by a particular Synopsys 10/100/1000 controller. The Synopsys controller
63  * supports 1..32, 64, or 128 Unicast filter entries for it's Unicast filter
64  * logic. This function validates a valid, supported configuration is
65  * selected, and defaults to 1 Unicast address if an unsupported
66  * configuration is selected.
67  */
68 static int dwmac1000_validate_ucast_entries(struct device *dev,
69                                             int ucast_entries)
70 {
71         int x = ucast_entries;
72
73         switch (x) {
74         case 1 ... 32:
75         case 64:
76         case 128:
77                 break;
78         default:
79                 x = 1;
80                 dev_info(dev, "Unicast table entries set to unexpected value %d\n",
81                          ucast_entries);
82                 break;
83         }
84         return x;
85 }
86
87 /**
88  * stmmac_axi_setup - parse DT parameters for programming the AXI register
89  * @pdev: platform device
90  * Description:
91  * if required, from device-tree the AXI internal register can be tuned
92  * by using platform parameters.
93  */
94 static struct stmmac_axi *stmmac_axi_setup(struct platform_device *pdev)
95 {
96         struct device_node *np;
97         struct stmmac_axi *axi;
98
99         np = of_parse_phandle(pdev->dev.of_node, "snps,axi-config", 0);
100         if (!np)
101                 return NULL;
102
103         axi = devm_kzalloc(&pdev->dev, sizeof(*axi), GFP_KERNEL);
104         if (!axi) {
105                 of_node_put(np);
106                 return ERR_PTR(-ENOMEM);
107         }
108
109         axi->axi_lpi_en = of_property_read_bool(np, "snps,lpi_en");
110         axi->axi_xit_frm = of_property_read_bool(np, "snps,xit_frm");
111         axi->axi_kbbe = of_property_read_bool(np, "snps,kbbe");
112         axi->axi_fb = of_property_read_bool(np, "snps,fb");
113         axi->axi_mb = of_property_read_bool(np, "snps,mb");
114         axi->axi_rb =  of_property_read_bool(np, "snps,rb");
115
116         if (of_property_read_u32(np, "snps,wr_osr_lmt", &axi->axi_wr_osr_lmt))
117                 axi->axi_wr_osr_lmt = 1;
118         if (of_property_read_u32(np, "snps,rd_osr_lmt", &axi->axi_rd_osr_lmt))
119                 axi->axi_rd_osr_lmt = 1;
120         of_property_read_u32_array(np, "snps,blen", axi->axi_blen, AXI_BLEN);
121         of_node_put(np);
122
123         return axi;
124 }
125
126 /**
127  * stmmac_mtl_setup - parse DT parameters for multiple queues configuration
128  * @pdev: platform device
129  * @plat: enet data
130  */
131 static int stmmac_mtl_setup(struct platform_device *pdev,
132                             struct plat_stmmacenet_data *plat)
133 {
134         struct device_node *q_node;
135         struct device_node *rx_node;
136         struct device_node *tx_node;
137         u8 queue = 0;
138         int ret = 0;
139
140         /* For backwards-compatibility with device trees that don't have any
141          * snps,mtl-rx-config or snps,mtl-tx-config properties, we fall back
142          * to one RX and TX queues each.
143          */
144         plat->rx_queues_to_use = 1;
145         plat->tx_queues_to_use = 1;
146
147         /* First Queue must always be in DCB mode. As MTL_QUEUE_DCB = 1 we need
148          * to always set this, otherwise Queue will be classified as AVB
149          * (because MTL_QUEUE_AVB = 0).
150          */
151         plat->rx_queues_cfg[0].mode_to_use = MTL_QUEUE_DCB;
152         plat->tx_queues_cfg[0].mode_to_use = MTL_QUEUE_DCB;
153
154         rx_node = of_parse_phandle(pdev->dev.of_node, "snps,mtl-rx-config", 0);
155         if (!rx_node)
156                 return ret;
157
158         tx_node = of_parse_phandle(pdev->dev.of_node, "snps,mtl-tx-config", 0);
159         if (!tx_node) {
160                 of_node_put(rx_node);
161                 return ret;
162         }
163
164         /* Processing RX queues common config */
165         if (of_property_read_u32(rx_node, "snps,rx-queues-to-use",
166                                  &plat->rx_queues_to_use))
167                 plat->rx_queues_to_use = 1;
168
169         if (of_property_read_bool(rx_node, "snps,rx-sched-sp"))
170                 plat->rx_sched_algorithm = MTL_RX_ALGORITHM_SP;
171         else if (of_property_read_bool(rx_node, "snps,rx-sched-wsp"))
172                 plat->rx_sched_algorithm = MTL_RX_ALGORITHM_WSP;
173         else
174                 plat->rx_sched_algorithm = MTL_RX_ALGORITHM_SP;
175
176         /* Processing individual RX queue config */
177         for_each_child_of_node(rx_node, q_node) {
178                 if (queue >= plat->rx_queues_to_use)
179                         break;
180
181                 if (of_property_read_bool(q_node, "snps,dcb-algorithm"))
182                         plat->rx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB;
183                 else if (of_property_read_bool(q_node, "snps,avb-algorithm"))
184                         plat->rx_queues_cfg[queue].mode_to_use = MTL_QUEUE_AVB;
185                 else
186                         plat->rx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB;
187
188                 if (of_property_read_u32(q_node, "snps,map-to-dma-channel",
189                                          &plat->rx_queues_cfg[queue].chan))
190                         plat->rx_queues_cfg[queue].chan = queue;
191                 /* TODO: Dynamic mapping to be included in the future */
192
193                 if (of_property_read_u32(q_node, "snps,priority",
194                                         &plat->rx_queues_cfg[queue].prio)) {
195                         plat->rx_queues_cfg[queue].prio = 0;
196                         plat->rx_queues_cfg[queue].use_prio = false;
197                 } else {
198                         plat->rx_queues_cfg[queue].use_prio = true;
199                 }
200
201                 /* RX queue specific packet type routing */
202                 if (of_property_read_bool(q_node, "snps,route-avcp"))
203                         plat->rx_queues_cfg[queue].pkt_route = PACKET_AVCPQ;
204                 else if (of_property_read_bool(q_node, "snps,route-ptp"))
205                         plat->rx_queues_cfg[queue].pkt_route = PACKET_PTPQ;
206                 else if (of_property_read_bool(q_node, "snps,route-dcbcp"))
207                         plat->rx_queues_cfg[queue].pkt_route = PACKET_DCBCPQ;
208                 else if (of_property_read_bool(q_node, "snps,route-up"))
209                         plat->rx_queues_cfg[queue].pkt_route = PACKET_UPQ;
210                 else if (of_property_read_bool(q_node, "snps,route-multi-broad"))
211                         plat->rx_queues_cfg[queue].pkt_route = PACKET_MCBCQ;
212                 else
213                         plat->rx_queues_cfg[queue].pkt_route = 0x0;
214
215                 queue++;
216         }
217         if (queue != plat->rx_queues_to_use) {
218                 ret = -EINVAL;
219                 dev_err(&pdev->dev, "Not all RX queues were configured\n");
220                 goto out;
221         }
222
223         /* Processing TX queues common config */
224         if (of_property_read_u32(tx_node, "snps,tx-queues-to-use",
225                                  &plat->tx_queues_to_use))
226                 plat->tx_queues_to_use = 1;
227
228         if (of_property_read_bool(tx_node, "snps,tx-sched-wrr"))
229                 plat->tx_sched_algorithm = MTL_TX_ALGORITHM_WRR;
230         else if (of_property_read_bool(tx_node, "snps,tx-sched-wfq"))
231                 plat->tx_sched_algorithm = MTL_TX_ALGORITHM_WFQ;
232         else if (of_property_read_bool(tx_node, "snps,tx-sched-dwrr"))
233                 plat->tx_sched_algorithm = MTL_TX_ALGORITHM_DWRR;
234         else
235                 plat->tx_sched_algorithm = MTL_TX_ALGORITHM_SP;
236
237         queue = 0;
238
239         /* Processing individual TX queue config */
240         for_each_child_of_node(tx_node, q_node) {
241                 if (queue >= plat->tx_queues_to_use)
242                         break;
243
244                 if (of_property_read_u32(q_node, "snps,weight",
245                                          &plat->tx_queues_cfg[queue].weight))
246                         plat->tx_queues_cfg[queue].weight = 0x10 + queue;
247
248                 if (of_property_read_bool(q_node, "snps,dcb-algorithm")) {
249                         plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB;
250                 } else if (of_property_read_bool(q_node,
251                                                  "snps,avb-algorithm")) {
252                         plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_AVB;
253
254                         /* Credit Base Shaper parameters used by AVB */
255                         if (of_property_read_u32(q_node, "snps,send_slope",
256                                 &plat->tx_queues_cfg[queue].send_slope))
257                                 plat->tx_queues_cfg[queue].send_slope = 0x0;
258                         if (of_property_read_u32(q_node, "snps,idle_slope",
259                                 &plat->tx_queues_cfg[queue].idle_slope))
260                                 plat->tx_queues_cfg[queue].idle_slope = 0x0;
261                         if (of_property_read_u32(q_node, "snps,high_credit",
262                                 &plat->tx_queues_cfg[queue].high_credit))
263                                 plat->tx_queues_cfg[queue].high_credit = 0x0;
264                         if (of_property_read_u32(q_node, "snps,low_credit",
265                                 &plat->tx_queues_cfg[queue].low_credit))
266                                 plat->tx_queues_cfg[queue].low_credit = 0x0;
267                 } else {
268                         plat->tx_queues_cfg[queue].mode_to_use = MTL_QUEUE_DCB;
269                 }
270
271                 if (of_property_read_u32(q_node, "snps,priority",
272                                         &plat->tx_queues_cfg[queue].prio)) {
273                         plat->tx_queues_cfg[queue].prio = 0;
274                         plat->tx_queues_cfg[queue].use_prio = false;
275                 } else {
276                         plat->tx_queues_cfg[queue].use_prio = true;
277                 }
278
279                 queue++;
280         }
281         if (queue != plat->tx_queues_to_use) {
282                 ret = -EINVAL;
283                 dev_err(&pdev->dev, "Not all TX queues were configured\n");
284                 goto out;
285         }
286
287 out:
288         of_node_put(rx_node);
289         of_node_put(tx_node);
290         of_node_put(q_node);
291
292         return ret;
293 }
294
295 /**
296  * stmmac_dt_phy - parse device-tree driver parameters to allocate PHY resources
297  * @plat: driver data platform structure
298  * @np: device tree node
299  * @dev: device pointer
300  * Description:
301  * The mdio bus will be allocated in case of a phy transceiver is on board;
302  * it will be NULL if the fixed-link is configured.
303  * If there is the "snps,dwmac-mdio" sub-node the mdio will be allocated
304  * in any case (for DSA, mdio must be registered even if fixed-link).
305  * The table below sums the supported configurations:
306  *      -------------------------------
307  *      snps,phy-addr   |     Y
308  *      -------------------------------
309  *      phy-handle      |     Y
310  *      -------------------------------
311  *      fixed-link      |     N
312  *      -------------------------------
313  *      snps,dwmac-mdio |
314  *        even if       |     Y
315  *      fixed-link      |
316  *      -------------------------------
317  *
318  * It returns 0 in case of success otherwise -ENODEV.
319  */
320 static int stmmac_dt_phy(struct plat_stmmacenet_data *plat,
321                          struct device_node *np, struct device *dev)
322 {
323         bool mdio = !of_phy_is_fixed_link(np);
324         static const struct of_device_id need_mdio_ids[] = {
325                 { .compatible = "snps,dwc-qos-ethernet-4.10" },
326                 {},
327         };
328
329         if (of_match_node(need_mdio_ids, np)) {
330                 plat->mdio_node = of_get_child_by_name(np, "mdio");
331         } else {
332                 /**
333                  * If snps,dwmac-mdio is passed from DT, always register
334                  * the MDIO
335                  */
336                 for_each_child_of_node(np, plat->mdio_node) {
337                         if (of_device_is_compatible(plat->mdio_node,
338                                                     "snps,dwmac-mdio"))
339                                 break;
340                 }
341         }
342
343         if (plat->mdio_node) {
344                 dev_dbg(dev, "Found MDIO subnode\n");
345                 mdio = true;
346         }
347
348         if (mdio) {
349                 plat->mdio_bus_data =
350                         devm_kzalloc(dev, sizeof(struct stmmac_mdio_bus_data),
351                                      GFP_KERNEL);
352                 if (!plat->mdio_bus_data)
353                         return -ENOMEM;
354
355                 plat->mdio_bus_data->needs_reset = true;
356         }
357
358         return 0;
359 }
360
361 /**
362  * stmmac_of_get_mac_mode - retrieves the interface of the MAC
363  * @np: - device-tree node
364  * Description:
365  * Similar to `of_get_phy_mode()`, this function will retrieve (from
366  * the device-tree) the interface mode on the MAC side. This assumes
367  * that there is mode converter in-between the MAC & PHY
368  * (e.g. GMII-to-RGMII).
369  */
370 static int stmmac_of_get_mac_mode(struct device_node *np)
371 {
372         const char *pm;
373         int err, i;
374
375         err = of_property_read_string(np, "mac-mode", &pm);
376         if (err < 0)
377                 return err;
378
379         for (i = 0; i < PHY_INTERFACE_MODE_MAX; i++) {
380                 if (!strcasecmp(pm, phy_modes(i)))
381                         return i;
382         }
383
384         return -ENODEV;
385 }
386
387 /**
388  * stmmac_probe_config_dt - parse device-tree driver parameters
389  * @pdev: platform_device structure
390  * @mac: MAC address to use
391  * Description:
392  * this function is to read the driver parameters from device-tree and
393  * set some private fields that will be used by the main at runtime.
394  */
395 struct plat_stmmacenet_data *
396 stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac)
397 {
398         struct device_node *np = pdev->dev.of_node;
399         struct plat_stmmacenet_data *plat;
400         struct stmmac_dma_cfg *dma_cfg;
401         int phy_mode;
402         void *ret;
403         int rc;
404
405         plat = devm_kzalloc(&pdev->dev, sizeof(*plat), GFP_KERNEL);
406         if (!plat)
407                 return ERR_PTR(-ENOMEM);
408
409         rc = of_get_mac_address(np, mac);
410         if (rc) {
411                 if (rc == -EPROBE_DEFER)
412                         return ERR_PTR(rc);
413
414                 eth_zero_addr(mac);
415         }
416
417         phy_mode = device_get_phy_mode(&pdev->dev);
418         if (phy_mode < 0)
419                 return ERR_PTR(phy_mode);
420
421         plat->phy_interface = phy_mode;
422         rc = stmmac_of_get_mac_mode(np);
423         plat->mac_interface = rc < 0 ? plat->phy_interface : rc;
424
425         /* Some wrapper drivers still rely on phy_node. Let's save it while
426          * they are not converted to phylink. */
427         plat->phy_node = of_parse_phandle(np, "phy-handle", 0);
428
429         /* PHYLINK automatically parses the phy-handle property */
430         plat->port_node = of_fwnode_handle(np);
431
432         /* Get max speed of operation from device tree */
433         of_property_read_u32(np, "max-speed", &plat->max_speed);
434
435         plat->bus_id = of_alias_get_id(np, "ethernet");
436         if (plat->bus_id < 0)
437                 plat->bus_id = 0;
438
439         /* Default to phy auto-detection */
440         plat->phy_addr = -1;
441
442         /* Default to get clk_csr from stmmac_clk_csr_set(),
443          * or get clk_csr from device tree.
444          */
445         plat->clk_csr = -1;
446         if (of_property_read_u32(np, "snps,clk-csr", &plat->clk_csr))
447                 of_property_read_u32(np, "clk_csr", &plat->clk_csr);
448
449         /* "snps,phy-addr" is not a standard property. Mark it as deprecated
450          * and warn of its use. Remove this when phy node support is added.
451          */
452         if (of_property_read_u32(np, "snps,phy-addr", &plat->phy_addr) == 0)
453                 dev_warn(&pdev->dev, "snps,phy-addr property is deprecated\n");
454
455         /* To Configure PHY by using all device-tree supported properties */
456         rc = stmmac_dt_phy(plat, np, &pdev->dev);
457         if (rc)
458                 return ERR_PTR(rc);
459
460         of_property_read_u32(np, "tx-fifo-depth", &plat->tx_fifo_size);
461
462         of_property_read_u32(np, "rx-fifo-depth", &plat->rx_fifo_size);
463
464         plat->force_sf_dma_mode =
465                 of_property_read_bool(np, "snps,force_sf_dma_mode");
466
467         if (of_property_read_bool(np, "snps,en-tx-lpi-clockgating"))
468                 plat->flags |= STMMAC_FLAG_EN_TX_LPI_CLOCKGATING;
469
470         /* Set the maxmtu to a default of JUMBO_LEN in case the
471          * parameter is not present in the device tree.
472          */
473         plat->maxmtu = JUMBO_LEN;
474
475         /* Set default value for multicast hash bins */
476         plat->multicast_filter_bins = HASH_TABLE_SIZE;
477
478         /* Set default value for unicast filter entries */
479         plat->unicast_filter_entries = 1;
480
481         /*
482          * Currently only the properties needed on SPEAr600
483          * are provided. All other properties should be added
484          * once needed on other platforms.
485          */
486         if (of_device_is_compatible(np, "st,spear600-gmac") ||
487                 of_device_is_compatible(np, "snps,dwmac-3.50a") ||
488                 of_device_is_compatible(np, "snps,dwmac-3.70a") ||
489                 of_device_is_compatible(np, "snps,dwmac")) {
490                 /* Note that the max-frame-size parameter as defined in the
491                  * ePAPR v1.1 spec is defined as max-frame-size, it's
492                  * actually used as the IEEE definition of MAC Client
493                  * data, or MTU. The ePAPR specification is confusing as
494                  * the definition is max-frame-size, but usage examples
495                  * are clearly MTUs
496                  */
497                 of_property_read_u32(np, "max-frame-size", &plat->maxmtu);
498                 of_property_read_u32(np, "snps,multicast-filter-bins",
499                                      &plat->multicast_filter_bins);
500                 of_property_read_u32(np, "snps,perfect-filter-entries",
501                                      &plat->unicast_filter_entries);
502                 plat->unicast_filter_entries = dwmac1000_validate_ucast_entries(
503                                 &pdev->dev, plat->unicast_filter_entries);
504                 plat->multicast_filter_bins = dwmac1000_validate_mcast_bins(
505                                 &pdev->dev, plat->multicast_filter_bins);
506                 plat->has_gmac = 1;
507                 plat->pmt = 1;
508         }
509
510         if (of_device_is_compatible(np, "snps,dwmac-3.40a")) {
511                 plat->has_gmac = 1;
512                 plat->enh_desc = 1;
513                 plat->tx_coe = 1;
514                 plat->bugged_jumbo = 1;
515                 plat->pmt = 1;
516         }
517
518         if (of_device_is_compatible(np, "snps,dwmac-4.00") ||
519             of_device_is_compatible(np, "snps,dwmac-4.10a") ||
520             of_device_is_compatible(np, "snps,dwmac-4.20a") ||
521             of_device_is_compatible(np, "snps,dwmac-5.10a") ||
522             of_device_is_compatible(np, "snps,dwmac-5.20")) {
523                 plat->has_gmac4 = 1;
524                 plat->has_gmac = 0;
525                 plat->pmt = 1;
526                 if (of_property_read_bool(np, "snps,tso"))
527                         plat->flags |= STMMAC_FLAG_TSO_EN;
528         }
529
530         if (of_device_is_compatible(np, "snps,dwmac-3.610") ||
531                 of_device_is_compatible(np, "snps,dwmac-3.710")) {
532                 plat->enh_desc = 1;
533                 plat->bugged_jumbo = 1;
534                 plat->force_sf_dma_mode = 1;
535         }
536
537         if (of_device_is_compatible(np, "snps,dwxgmac")) {
538                 plat->has_xgmac = 1;
539                 plat->pmt = 1;
540                 if (of_property_read_bool(np, "snps,tso"))
541                         plat->flags |= STMMAC_FLAG_TSO_EN;
542         }
543
544         dma_cfg = devm_kzalloc(&pdev->dev, sizeof(*dma_cfg),
545                                GFP_KERNEL);
546         if (!dma_cfg) {
547                 stmmac_remove_config_dt(pdev, plat);
548                 return ERR_PTR(-ENOMEM);
549         }
550         plat->dma_cfg = dma_cfg;
551
552         of_property_read_u32(np, "snps,pbl", &dma_cfg->pbl);
553         if (!dma_cfg->pbl)
554                 dma_cfg->pbl = DEFAULT_DMA_PBL;
555         of_property_read_u32(np, "snps,txpbl", &dma_cfg->txpbl);
556         of_property_read_u32(np, "snps,rxpbl", &dma_cfg->rxpbl);
557         dma_cfg->pblx8 = !of_property_read_bool(np, "snps,no-pbl-x8");
558
559         dma_cfg->aal = of_property_read_bool(np, "snps,aal");
560         dma_cfg->fixed_burst = of_property_read_bool(np, "snps,fixed-burst");
561         dma_cfg->mixed_burst = of_property_read_bool(np, "snps,mixed-burst");
562
563         plat->force_thresh_dma_mode = of_property_read_bool(np, "snps,force_thresh_dma_mode");
564         if (plat->force_thresh_dma_mode && plat->force_sf_dma_mode) {
565                 plat->force_sf_dma_mode = 0;
566                 dev_warn(&pdev->dev,
567                          "force_sf_dma_mode is ignored if force_thresh_dma_mode is set.\n");
568         }
569
570         of_property_read_u32(np, "snps,ps-speed", &plat->mac_port_sel_speed);
571
572         plat->axi = stmmac_axi_setup(pdev);
573
574         rc = stmmac_mtl_setup(pdev, plat);
575         if (rc) {
576                 stmmac_remove_config_dt(pdev, plat);
577                 return ERR_PTR(rc);
578         }
579
580         /* clock setup */
581         if (!of_device_is_compatible(np, "snps,dwc-qos-ethernet-4.10")) {
582                 plat->stmmac_clk = devm_clk_get(&pdev->dev,
583                                                 STMMAC_RESOURCE_NAME);
584                 if (IS_ERR(plat->stmmac_clk)) {
585                         dev_warn(&pdev->dev, "Cannot get CSR clock\n");
586                         plat->stmmac_clk = NULL;
587                 }
588                 clk_prepare_enable(plat->stmmac_clk);
589         }
590
591         plat->pclk = devm_clk_get_optional(&pdev->dev, "pclk");
592         if (IS_ERR(plat->pclk)) {
593                 ret = plat->pclk;
594                 goto error_pclk_get;
595         }
596         clk_prepare_enable(plat->pclk);
597
598         /* Fall-back to main clock in case of no PTP ref is passed */
599         plat->clk_ptp_ref = devm_clk_get(&pdev->dev, "ptp_ref");
600         if (IS_ERR(plat->clk_ptp_ref)) {
601                 plat->clk_ptp_rate = clk_get_rate(plat->stmmac_clk);
602                 plat->clk_ptp_ref = NULL;
603                 dev_info(&pdev->dev, "PTP uses main clock\n");
604         } else {
605                 plat->clk_ptp_rate = clk_get_rate(plat->clk_ptp_ref);
606                 dev_dbg(&pdev->dev, "PTP rate %d\n", plat->clk_ptp_rate);
607         }
608
609         plat->stmmac_rst = devm_reset_control_get_optional(&pdev->dev,
610                                                            STMMAC_RESOURCE_NAME);
611         if (IS_ERR(plat->stmmac_rst)) {
612                 ret = plat->stmmac_rst;
613                 goto error_hw_init;
614         }
615
616         plat->stmmac_ahb_rst = devm_reset_control_get_optional_shared(
617                                                         &pdev->dev, "ahb");
618         if (IS_ERR(plat->stmmac_ahb_rst)) {
619                 ret = plat->stmmac_ahb_rst;
620                 goto error_hw_init;
621         }
622
623         return plat;
624
625 error_hw_init:
626         clk_disable_unprepare(plat->pclk);
627 error_pclk_get:
628         clk_disable_unprepare(plat->stmmac_clk);
629
630         return ret;
631 }
632
633 static void devm_stmmac_remove_config_dt(void *data)
634 {
635         struct plat_stmmacenet_data *plat = data;
636
637         /* Platform data argument is unused */
638         stmmac_remove_config_dt(NULL, plat);
639 }
640
641 /**
642  * devm_stmmac_probe_config_dt
643  * @pdev: platform_device structure
644  * @mac: MAC address to use
645  * Description: Devres variant of stmmac_probe_config_dt(). Does not require
646  * the user to call stmmac_remove_config_dt() at driver detach.
647  */
648 struct plat_stmmacenet_data *
649 devm_stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac)
650 {
651         struct plat_stmmacenet_data *plat;
652         int ret;
653
654         plat = stmmac_probe_config_dt(pdev, mac);
655         if (IS_ERR(plat))
656                 return plat;
657
658         ret = devm_add_action_or_reset(&pdev->dev,
659                                        devm_stmmac_remove_config_dt, plat);
660         if (ret)
661                 return ERR_PTR(ret);
662
663         return plat;
664 }
665
666 /**
667  * stmmac_remove_config_dt - undo the effects of stmmac_probe_config_dt()
668  * @pdev: platform_device structure
669  * @plat: driver data platform structure
670  *
671  * Release resources claimed by stmmac_probe_config_dt().
672  */
673 void stmmac_remove_config_dt(struct platform_device *pdev,
674                              struct plat_stmmacenet_data *plat)
675 {
676         clk_disable_unprepare(plat->stmmac_clk);
677         clk_disable_unprepare(plat->pclk);
678         of_node_put(plat->phy_node);
679         of_node_put(plat->mdio_node);
680 }
681 #else
682 struct plat_stmmacenet_data *
683 stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac)
684 {
685         return ERR_PTR(-EINVAL);
686 }
687
688 struct plat_stmmacenet_data *
689 devm_stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac)
690 {
691         return ERR_PTR(-EINVAL);
692 }
693
694 void stmmac_remove_config_dt(struct platform_device *pdev,
695                              struct plat_stmmacenet_data *plat)
696 {
697 }
698 #endif /* CONFIG_OF */
699 EXPORT_SYMBOL_GPL(stmmac_probe_config_dt);
700 EXPORT_SYMBOL_GPL(devm_stmmac_probe_config_dt);
701 EXPORT_SYMBOL_GPL(stmmac_remove_config_dt);
702
703 int stmmac_get_platform_resources(struct platform_device *pdev,
704                                   struct stmmac_resources *stmmac_res)
705 {
706         memset(stmmac_res, 0, sizeof(*stmmac_res));
707
708         /* Get IRQ information early to have an ability to ask for deferred
709          * probe if needed before we went too far with resource allocation.
710          */
711         stmmac_res->irq = platform_get_irq_byname(pdev, "macirq");
712         if (stmmac_res->irq < 0)
713                 return stmmac_res->irq;
714
715         /* On some platforms e.g. SPEAr the wake up irq differs from the mac irq
716          * The external wake up irq can be passed through the platform code
717          * named as "eth_wake_irq"
718          *
719          * In case the wake up interrupt is not passed from the platform
720          * so the driver will continue to use the mac irq (ndev->irq)
721          */
722         stmmac_res->wol_irq =
723                 platform_get_irq_byname_optional(pdev, "eth_wake_irq");
724         if (stmmac_res->wol_irq < 0) {
725                 if (stmmac_res->wol_irq == -EPROBE_DEFER)
726                         return -EPROBE_DEFER;
727                 dev_info(&pdev->dev, "IRQ eth_wake_irq not found\n");
728                 stmmac_res->wol_irq = stmmac_res->irq;
729         }
730
731         stmmac_res->lpi_irq =
732                 platform_get_irq_byname_optional(pdev, "eth_lpi");
733         if (stmmac_res->lpi_irq < 0) {
734                 if (stmmac_res->lpi_irq == -EPROBE_DEFER)
735                         return -EPROBE_DEFER;
736                 dev_info(&pdev->dev, "IRQ eth_lpi not found\n");
737         }
738
739         stmmac_res->addr = devm_platform_ioremap_resource(pdev, 0);
740
741         return PTR_ERR_OR_ZERO(stmmac_res->addr);
742 }
743 EXPORT_SYMBOL_GPL(stmmac_get_platform_resources);
744
745 /**
746  * stmmac_pltfr_init
747  * @pdev: pointer to the platform device
748  * @plat: driver data platform structure
749  * Description: Call the platform's init callback (if any) and propagate
750  * the return value.
751  */
752 int stmmac_pltfr_init(struct platform_device *pdev,
753                       struct plat_stmmacenet_data *plat)
754 {
755         int ret = 0;
756
757         if (plat->init)
758                 ret = plat->init(pdev, plat->bsp_priv);
759
760         return ret;
761 }
762 EXPORT_SYMBOL_GPL(stmmac_pltfr_init);
763
764 /**
765  * stmmac_pltfr_exit
766  * @pdev: pointer to the platform device
767  * @plat: driver data platform structure
768  * Description: Call the platform's exit callback (if any).
769  */
770 void stmmac_pltfr_exit(struct platform_device *pdev,
771                        struct plat_stmmacenet_data *plat)
772 {
773         if (plat->exit)
774                 plat->exit(pdev, plat->bsp_priv);
775 }
776 EXPORT_SYMBOL_GPL(stmmac_pltfr_exit);
777
778 /**
779  * stmmac_pltfr_probe
780  * @pdev: platform device pointer
781  * @plat: driver data platform structure
782  * @res: stmmac resources structure
783  * Description: This calls the platform's init() callback and probes the
784  * stmmac driver.
785  */
786 int stmmac_pltfr_probe(struct platform_device *pdev,
787                        struct plat_stmmacenet_data *plat,
788                        struct stmmac_resources *res)
789 {
790         int ret;
791
792         ret = stmmac_pltfr_init(pdev, plat);
793         if (ret)
794                 return ret;
795
796         ret = stmmac_dvr_probe(&pdev->dev, plat, res);
797         if (ret) {
798                 stmmac_pltfr_exit(pdev, plat);
799                 return ret;
800         }
801
802         return ret;
803 }
804 EXPORT_SYMBOL_GPL(stmmac_pltfr_probe);
805
806 static void devm_stmmac_pltfr_remove(void *data)
807 {
808         struct platform_device *pdev = data;
809
810         stmmac_pltfr_remove_no_dt(pdev);
811 }
812
813 /**
814  * devm_stmmac_pltfr_probe
815  * @pdev: pointer to the platform device
816  * @plat: driver data platform structure
817  * @res: stmmac resources
818  * Description: Devres variant of stmmac_pltfr_probe(). Allows users to skip
819  * calling stmmac_pltfr_remove() on driver detach.
820  */
821 int devm_stmmac_pltfr_probe(struct platform_device *pdev,
822                             struct plat_stmmacenet_data *plat,
823                             struct stmmac_resources *res)
824 {
825         int ret;
826
827         ret = stmmac_pltfr_probe(pdev, plat, res);
828         if (ret)
829                 return ret;
830
831         return devm_add_action_or_reset(&pdev->dev, devm_stmmac_pltfr_remove,
832                                         pdev);
833 }
834 EXPORT_SYMBOL_GPL(devm_stmmac_pltfr_probe);
835
836 /**
837  * stmmac_pltfr_remove_no_dt
838  * @pdev: pointer to the platform device
839  * Description: This undoes the effects of stmmac_pltfr_probe() by removing the
840  * driver and calling the platform's exit() callback.
841  */
842 void stmmac_pltfr_remove_no_dt(struct platform_device *pdev)
843 {
844         struct net_device *ndev = platform_get_drvdata(pdev);
845         struct stmmac_priv *priv = netdev_priv(ndev);
846         struct plat_stmmacenet_data *plat = priv->plat;
847
848         stmmac_dvr_remove(&pdev->dev);
849         stmmac_pltfr_exit(pdev, plat);
850 }
851 EXPORT_SYMBOL_GPL(stmmac_pltfr_remove_no_dt);
852
853 /**
854  * stmmac_pltfr_remove
855  * @pdev: platform device pointer
856  * Description: this function calls the main to free the net resources
857  * and calls the platforms hook and release the resources (e.g. mem).
858  */
859 void stmmac_pltfr_remove(struct platform_device *pdev)
860 {
861         struct net_device *ndev = platform_get_drvdata(pdev);
862         struct stmmac_priv *priv = netdev_priv(ndev);
863         struct plat_stmmacenet_data *plat = priv->plat;
864
865         stmmac_pltfr_remove_no_dt(pdev);
866         stmmac_remove_config_dt(pdev, plat);
867 }
868 EXPORT_SYMBOL_GPL(stmmac_pltfr_remove);
869
870 /**
871  * stmmac_pltfr_suspend
872  * @dev: device pointer
873  * Description: this function is invoked when suspend the driver and it direcly
874  * call the main suspend function and then, if required, on some platform, it
875  * can call an exit helper.
876  */
877 static int __maybe_unused stmmac_pltfr_suspend(struct device *dev)
878 {
879         int ret;
880         struct net_device *ndev = dev_get_drvdata(dev);
881         struct stmmac_priv *priv = netdev_priv(ndev);
882         struct platform_device *pdev = to_platform_device(dev);
883
884         ret = stmmac_suspend(dev);
885         stmmac_pltfr_exit(pdev, priv->plat);
886
887         return ret;
888 }
889
890 /**
891  * stmmac_pltfr_resume
892  * @dev: device pointer
893  * Description: this function is invoked when resume the driver before calling
894  * the main resume function, on some platforms, it can call own init helper
895  * if required.
896  */
897 static int __maybe_unused stmmac_pltfr_resume(struct device *dev)
898 {
899         struct net_device *ndev = dev_get_drvdata(dev);
900         struct stmmac_priv *priv = netdev_priv(ndev);
901         struct platform_device *pdev = to_platform_device(dev);
902         int ret;
903
904         ret = stmmac_pltfr_init(pdev, priv->plat->bsp_priv);
905         if (ret)
906                 return ret;
907
908         return stmmac_resume(dev);
909 }
910
911 static int __maybe_unused stmmac_runtime_suspend(struct device *dev)
912 {
913         struct net_device *ndev = dev_get_drvdata(dev);
914         struct stmmac_priv *priv = netdev_priv(ndev);
915
916         stmmac_bus_clks_config(priv, false);
917
918         return 0;
919 }
920
921 static int __maybe_unused stmmac_runtime_resume(struct device *dev)
922 {
923         struct net_device *ndev = dev_get_drvdata(dev);
924         struct stmmac_priv *priv = netdev_priv(ndev);
925
926         return stmmac_bus_clks_config(priv, true);
927 }
928
929 static int __maybe_unused stmmac_pltfr_noirq_suspend(struct device *dev)
930 {
931         struct net_device *ndev = dev_get_drvdata(dev);
932         struct stmmac_priv *priv = netdev_priv(ndev);
933         int ret;
934
935         if (!netif_running(ndev))
936                 return 0;
937
938         if (!device_may_wakeup(priv->device) || !priv->plat->pmt) {
939                 /* Disable clock in case of PWM is off */
940                 clk_disable_unprepare(priv->plat->clk_ptp_ref);
941
942                 ret = pm_runtime_force_suspend(dev);
943                 if (ret)
944                         return ret;
945         }
946
947         return 0;
948 }
949
950 static int __maybe_unused stmmac_pltfr_noirq_resume(struct device *dev)
951 {
952         struct net_device *ndev = dev_get_drvdata(dev);
953         struct stmmac_priv *priv = netdev_priv(ndev);
954         int ret;
955
956         if (!netif_running(ndev))
957                 return 0;
958
959         if (!device_may_wakeup(priv->device) || !priv->plat->pmt) {
960                 /* enable the clk previously disabled */
961                 ret = pm_runtime_force_resume(dev);
962                 if (ret)
963                         return ret;
964
965                 ret = clk_prepare_enable(priv->plat->clk_ptp_ref);
966                 if (ret < 0) {
967                         netdev_warn(priv->dev,
968                                     "failed to enable PTP reference clock: %pe\n",
969                                     ERR_PTR(ret));
970                         return ret;
971                 }
972         }
973
974         return 0;
975 }
976
977 const struct dev_pm_ops stmmac_pltfr_pm_ops = {
978         SET_SYSTEM_SLEEP_PM_OPS(stmmac_pltfr_suspend, stmmac_pltfr_resume)
979         SET_RUNTIME_PM_OPS(stmmac_runtime_suspend, stmmac_runtime_resume, NULL)
980         SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(stmmac_pltfr_noirq_suspend, stmmac_pltfr_noirq_resume)
981 };
982 EXPORT_SYMBOL_GPL(stmmac_pltfr_pm_ops);
983
984 MODULE_DESCRIPTION("STMMAC 10/100/1000 Ethernet platform support");
985 MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
986 MODULE_LICENSE("GPL");