1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (c) 2018 MediaTek Inc.
4 */
5 #include <linux/bitfield.h>
6 #include <linux/io.h>
7 #include <linux/mfd/syscon.h>
8 #include <linux/module.h>
9 #include <linux/of.h>
10 #include <linux/of_net.h>
11 #include <linux/platform_device.h>
12 #include <linux/regmap.h>
13 #include <linux/stmmac.h>
14
15 #include "stmmac.h"
16 #include "stmmac_platform.h"
17
18 /* Peri Configuration register for mt2712 */
19 #define PERI_ETH_PHY_INTF_SEL 0x418
20 #define PHY_INTF_MII 0
21 #define PHY_INTF_RGMII 1
22 #define PHY_INTF_RMII 4
23 #define RMII_CLK_SRC_RXC BIT(4)
24 #define RMII_CLK_SRC_INTERNAL BIT(5)
25
26 #define PERI_ETH_DLY 0x428
27 #define ETH_DLY_GTXC_INV BIT(6)
28 #define ETH_DLY_GTXC_ENABLE BIT(5)
29 #define ETH_DLY_GTXC_STAGES GENMASK(4, 0)
30 #define ETH_DLY_TXC_INV BIT(20)
31 #define ETH_DLY_TXC_ENABLE BIT(19)
32 #define ETH_DLY_TXC_STAGES GENMASK(18, 14)
33 #define ETH_DLY_RXC_INV BIT(13)
34 #define ETH_DLY_RXC_ENABLE BIT(12)
35 #define ETH_DLY_RXC_STAGES GENMASK(11, 7)
36
37 #define PERI_ETH_DLY_FINE 0x800
38 #define ETH_RMII_DLY_TX_INV BIT(2)
39 #define ETH_FINE_DLY_GTXC BIT(1)
40 #define ETH_FINE_DLY_RXC BIT(0)
41
42 /* Peri Configuration register for mt8195 */
43 #define MT8195_PERI_ETH_CTRL0 0xFD0
44 #define MT8195_RMII_CLK_SRC_INTERNAL BIT(28)
45 #define MT8195_RMII_CLK_SRC_RXC BIT(27)
46 #define MT8195_ETH_INTF_SEL GENMASK(26, 24)
47 #define MT8195_RGMII_TXC_PHASE_CTRL BIT(22)
48 #define MT8195_EXT_PHY_MODE BIT(21)
49 #define MT8195_DLY_GTXC_INV BIT(12)
50 #define MT8195_DLY_GTXC_ENABLE BIT(5)
51 #define MT8195_DLY_GTXC_STAGES GENMASK(4, 0)
52
53 #define MT8195_PERI_ETH_CTRL1 0xFD4
54 #define MT8195_DLY_RXC_INV BIT(25)
55 #define MT8195_DLY_RXC_ENABLE BIT(18)
56 #define MT8195_DLY_RXC_STAGES GENMASK(17, 13)
57 #define MT8195_DLY_TXC_INV BIT(12)
58 #define MT8195_DLY_TXC_ENABLE BIT(5)
59 #define MT8195_DLY_TXC_STAGES GENMASK(4, 0)
60
61 #define MT8195_PERI_ETH_CTRL2 0xFD8
62 #define MT8195_DLY_RMII_RXC_INV BIT(25)
63 #define MT8195_DLY_RMII_RXC_ENABLE BIT(18)
64 #define MT8195_DLY_RMII_RXC_STAGES GENMASK(17, 13)
65 #define MT8195_DLY_RMII_TXC_INV BIT(12)
66 #define MT8195_DLY_RMII_TXC_ENABLE BIT(5)
67 #define MT8195_DLY_RMII_TXC_STAGES GENMASK(4, 0)
68
69 struct mac_delay_struct {
70 u32 tx_delay;
71 u32 rx_delay;
72 bool tx_inv;
73 bool rx_inv;
74 };
75
76 struct mediatek_dwmac_plat_data {
77 const struct mediatek_dwmac_variant *variant;
78 struct mac_delay_struct mac_delay;
79 struct clk *rmii_internal_clk;
80 struct clk_bulk_data *clks;
81 struct regmap *peri_regmap;
82 struct device_node *np;
83 struct device *dev;
84 phy_interface_t phy_mode;
85 bool rmii_clk_from_mac;
86 bool rmii_rxc;
87 bool mac_wol;
88 };
89
90 struct mediatek_dwmac_variant {
91 int (*dwmac_set_phy_interface)(struct mediatek_dwmac_plat_data *plat);
92 int (*dwmac_set_delay)(struct mediatek_dwmac_plat_data *plat);
93
94 /* clock ids to be requested */
95 const char * const *clk_list;
96 int num_clks;
97
98 u32 dma_bit_mask;
99 u32 rx_delay_max;
100 u32 tx_delay_max;
101 };
102
103 /* list of clocks required for mac */
104 static const char * const mt2712_dwmac_clk_l[] = {
105 "axi", "apb", "mac_main", "ptp_ref"
106 };
107
108 static const char * const mt8195_dwmac_clk_l[] = {
109 "axi", "apb", "mac_cg", "mac_main", "ptp_ref"
110 };
111
mt2712_set_interface(struct mediatek_dwmac_plat_data * plat)112 static int mt2712_set_interface(struct mediatek_dwmac_plat_data *plat)
113 {
114 int rmii_clk_from_mac = plat->rmii_clk_from_mac ? RMII_CLK_SRC_INTERNAL : 0;
115 int rmii_rxc = plat->rmii_rxc ? RMII_CLK_SRC_RXC : 0;
116 u32 intf_val = 0;
117
118 /* select phy interface in top control domain */
119 switch (plat->phy_mode) {
120 case PHY_INTERFACE_MODE_MII:
121 intf_val |= PHY_INTF_MII;
122 break;
123 case PHY_INTERFACE_MODE_RMII:
124 intf_val |= (PHY_INTF_RMII | rmii_rxc | rmii_clk_from_mac);
125 break;
126 case PHY_INTERFACE_MODE_RGMII:
127 case PHY_INTERFACE_MODE_RGMII_TXID:
128 case PHY_INTERFACE_MODE_RGMII_RXID:
129 case PHY_INTERFACE_MODE_RGMII_ID:
130 intf_val |= PHY_INTF_RGMII;
131 break;
132 default:
133 dev_err(plat->dev, "phy interface not supported\n");
134 return -EINVAL;
135 }
136
137 regmap_write(plat->peri_regmap, PERI_ETH_PHY_INTF_SEL, intf_val);
138
139 return 0;
140 }
141
mt2712_delay_ps2stage(struct mediatek_dwmac_plat_data * plat)142 static void mt2712_delay_ps2stage(struct mediatek_dwmac_plat_data *plat)
143 {
144 struct mac_delay_struct *mac_delay = &plat->mac_delay;
145
146 switch (plat->phy_mode) {
147 case PHY_INTERFACE_MODE_MII:
148 case PHY_INTERFACE_MODE_RMII:
149 /* 550ps per stage for MII/RMII */
150 mac_delay->tx_delay /= 550;
151 mac_delay->rx_delay /= 550;
152 break;
153 case PHY_INTERFACE_MODE_RGMII:
154 case PHY_INTERFACE_MODE_RGMII_TXID:
155 case PHY_INTERFACE_MODE_RGMII_RXID:
156 case PHY_INTERFACE_MODE_RGMII_ID:
157 /* 170ps per stage for RGMII */
158 mac_delay->tx_delay /= 170;
159 mac_delay->rx_delay /= 170;
160 break;
161 default:
162 dev_err(plat->dev, "phy interface not supported\n");
163 break;
164 }
165 }
166
mt2712_delay_stage2ps(struct mediatek_dwmac_plat_data * plat)167 static void mt2712_delay_stage2ps(struct mediatek_dwmac_plat_data *plat)
168 {
169 struct mac_delay_struct *mac_delay = &plat->mac_delay;
170
171 switch (plat->phy_mode) {
172 case PHY_INTERFACE_MODE_MII:
173 case PHY_INTERFACE_MODE_RMII:
174 /* 550ps per stage for MII/RMII */
175 mac_delay->tx_delay *= 550;
176 mac_delay->rx_delay *= 550;
177 break;
178 case PHY_INTERFACE_MODE_RGMII:
179 case PHY_INTERFACE_MODE_RGMII_TXID:
180 case PHY_INTERFACE_MODE_RGMII_RXID:
181 case PHY_INTERFACE_MODE_RGMII_ID:
182 /* 170ps per stage for RGMII */
183 mac_delay->tx_delay *= 170;
184 mac_delay->rx_delay *= 170;
185 break;
186 default:
187 dev_err(plat->dev, "phy interface not supported\n");
188 break;
189 }
190 }
191
mt2712_set_delay(struct mediatek_dwmac_plat_data * plat)192 static int mt2712_set_delay(struct mediatek_dwmac_plat_data *plat)
193 {
194 struct mac_delay_struct *mac_delay = &plat->mac_delay;
195 u32 delay_val = 0, fine_val = 0;
196
197 mt2712_delay_ps2stage(plat);
198
199 switch (plat->phy_mode) {
200 case PHY_INTERFACE_MODE_MII:
201 delay_val |= FIELD_PREP(ETH_DLY_TXC_ENABLE, !!mac_delay->tx_delay);
202 delay_val |= FIELD_PREP(ETH_DLY_TXC_STAGES, mac_delay->tx_delay);
203 delay_val |= FIELD_PREP(ETH_DLY_TXC_INV, mac_delay->tx_inv);
204
205 delay_val |= FIELD_PREP(ETH_DLY_RXC_ENABLE, !!mac_delay->rx_delay);
206 delay_val |= FIELD_PREP(ETH_DLY_RXC_STAGES, mac_delay->rx_delay);
207 delay_val |= FIELD_PREP(ETH_DLY_RXC_INV, mac_delay->rx_inv);
208 break;
209 case PHY_INTERFACE_MODE_RMII:
210 if (plat->rmii_clk_from_mac) {
211 /* case 1: mac provides the rmii reference clock,
212 * and the clock output to TXC pin.
213 * The egress timing can be adjusted by GTXC delay macro circuit.
214 * The ingress timing can be adjusted by TXC delay macro circuit.
215 */
216 delay_val |= FIELD_PREP(ETH_DLY_TXC_ENABLE, !!mac_delay->rx_delay);
217 delay_val |= FIELD_PREP(ETH_DLY_TXC_STAGES, mac_delay->rx_delay);
218 delay_val |= FIELD_PREP(ETH_DLY_TXC_INV, mac_delay->rx_inv);
219
220 delay_val |= FIELD_PREP(ETH_DLY_GTXC_ENABLE, !!mac_delay->tx_delay);
221 delay_val |= FIELD_PREP(ETH_DLY_GTXC_STAGES, mac_delay->tx_delay);
222 delay_val |= FIELD_PREP(ETH_DLY_GTXC_INV, mac_delay->tx_inv);
223 } else {
224 /* case 2: the rmii reference clock is from external phy,
225 * and the property "rmii_rxc" indicates which pin(TXC/RXC)
226 * the reference clk is connected to. The reference clock is a
227 * received signal, so rx_delay/rx_inv are used to indicate
228 * the reference clock timing adjustment
229 */
230 if (plat->rmii_rxc) {
231 /* the rmii reference clock from outside is connected
232 * to RXC pin, the reference clock will be adjusted
233 * by RXC delay macro circuit.
234 */
235 delay_val |= FIELD_PREP(ETH_DLY_RXC_ENABLE, !!mac_delay->rx_delay);
236 delay_val |= FIELD_PREP(ETH_DLY_RXC_STAGES, mac_delay->rx_delay);
237 delay_val |= FIELD_PREP(ETH_DLY_RXC_INV, mac_delay->rx_inv);
238 } else {
239 /* the rmii reference clock from outside is connected
240 * to TXC pin, the reference clock will be adjusted
241 * by TXC delay macro circuit.
242 */
243 delay_val |= FIELD_PREP(ETH_DLY_TXC_ENABLE, !!mac_delay->rx_delay);
244 delay_val |= FIELD_PREP(ETH_DLY_TXC_STAGES, mac_delay->rx_delay);
245 delay_val |= FIELD_PREP(ETH_DLY_TXC_INV, mac_delay->rx_inv);
246 }
247 /* tx_inv will inverse the tx clock inside mac relateive to
248 * reference clock from external phy,
249 * and this bit is located in the same register with fine-tune
250 */
251 if (mac_delay->tx_inv)
252 fine_val = ETH_RMII_DLY_TX_INV;
253 }
254 break;
255 case PHY_INTERFACE_MODE_RGMII:
256 case PHY_INTERFACE_MODE_RGMII_TXID:
257 case PHY_INTERFACE_MODE_RGMII_RXID:
258 case PHY_INTERFACE_MODE_RGMII_ID:
259 fine_val = ETH_FINE_DLY_GTXC | ETH_FINE_DLY_RXC;
260
261 delay_val |= FIELD_PREP(ETH_DLY_GTXC_ENABLE, !!mac_delay->tx_delay);
262 delay_val |= FIELD_PREP(ETH_DLY_GTXC_STAGES, mac_delay->tx_delay);
263 delay_val |= FIELD_PREP(ETH_DLY_GTXC_INV, mac_delay->tx_inv);
264
265 delay_val |= FIELD_PREP(ETH_DLY_RXC_ENABLE, !!mac_delay->rx_delay);
266 delay_val |= FIELD_PREP(ETH_DLY_RXC_STAGES, mac_delay->rx_delay);
267 delay_val |= FIELD_PREP(ETH_DLY_RXC_INV, mac_delay->rx_inv);
268 break;
269 default:
270 dev_err(plat->dev, "phy interface not supported\n");
271 return -EINVAL;
272 }
273 regmap_write(plat->peri_regmap, PERI_ETH_DLY, delay_val);
274 regmap_write(plat->peri_regmap, PERI_ETH_DLY_FINE, fine_val);
275
276 mt2712_delay_stage2ps(plat);
277
278 return 0;
279 }
280
281 static const struct mediatek_dwmac_variant mt2712_gmac_variant = {
282 .dwmac_set_phy_interface = mt2712_set_interface,
283 .dwmac_set_delay = mt2712_set_delay,
284 .clk_list = mt2712_dwmac_clk_l,
285 .num_clks = ARRAY_SIZE(mt2712_dwmac_clk_l),
286 .dma_bit_mask = 33,
287 .rx_delay_max = 17600,
288 .tx_delay_max = 17600,
289 };
290
mt8195_set_interface(struct mediatek_dwmac_plat_data * plat)291 static int mt8195_set_interface(struct mediatek_dwmac_plat_data *plat)
292 {
293 int rmii_clk_from_mac = plat->rmii_clk_from_mac ? MT8195_RMII_CLK_SRC_INTERNAL : 0;
294 int rmii_rxc = plat->rmii_rxc ? MT8195_RMII_CLK_SRC_RXC : 0;
295 u32 intf_val = 0;
296
297 /* select phy interface in top control domain */
298 switch (plat->phy_mode) {
299 case PHY_INTERFACE_MODE_MII:
300 intf_val |= FIELD_PREP(MT8195_ETH_INTF_SEL, PHY_INTF_MII);
301 break;
302 case PHY_INTERFACE_MODE_RMII:
303 intf_val |= (rmii_rxc | rmii_clk_from_mac);
304 intf_val |= FIELD_PREP(MT8195_ETH_INTF_SEL, PHY_INTF_RMII);
305 break;
306 case PHY_INTERFACE_MODE_RGMII:
307 case PHY_INTERFACE_MODE_RGMII_TXID:
308 case PHY_INTERFACE_MODE_RGMII_RXID:
309 case PHY_INTERFACE_MODE_RGMII_ID:
310 intf_val |= FIELD_PREP(MT8195_ETH_INTF_SEL, PHY_INTF_RGMII);
311 break;
312 default:
313 dev_err(plat->dev, "phy interface not supported\n");
314 return -EINVAL;
315 }
316
317 /* MT8195 only support external PHY */
318 intf_val |= MT8195_EXT_PHY_MODE;
319
320 regmap_write(plat->peri_regmap, MT8195_PERI_ETH_CTRL0, intf_val);
321
322 return 0;
323 }
324
mt8195_delay_ps2stage(struct mediatek_dwmac_plat_data * plat)325 static void mt8195_delay_ps2stage(struct mediatek_dwmac_plat_data *plat)
326 {
327 struct mac_delay_struct *mac_delay = &plat->mac_delay;
328
329 /* 290ps per stage */
330 mac_delay->tx_delay /= 290;
331 mac_delay->rx_delay /= 290;
332 }
333
mt8195_delay_stage2ps(struct mediatek_dwmac_plat_data * plat)334 static void mt8195_delay_stage2ps(struct mediatek_dwmac_plat_data *plat)
335 {
336 struct mac_delay_struct *mac_delay = &plat->mac_delay;
337
338 /* 290ps per stage */
339 mac_delay->tx_delay *= 290;
340 mac_delay->rx_delay *= 290;
341 }
342
mt8195_set_delay(struct mediatek_dwmac_plat_data * plat)343 static int mt8195_set_delay(struct mediatek_dwmac_plat_data *plat)
344 {
345 struct mac_delay_struct *mac_delay = &plat->mac_delay;
346 u32 gtxc_delay_val = 0, delay_val = 0, rmii_delay_val = 0;
347
348 mt8195_delay_ps2stage(plat);
349
350 switch (plat->phy_mode) {
351 case PHY_INTERFACE_MODE_MII:
352 delay_val |= FIELD_PREP(MT8195_DLY_TXC_ENABLE, !!mac_delay->tx_delay);
353 delay_val |= FIELD_PREP(MT8195_DLY_TXC_STAGES, mac_delay->tx_delay);
354 delay_val |= FIELD_PREP(MT8195_DLY_TXC_INV, mac_delay->tx_inv);
355
356 delay_val |= FIELD_PREP(MT8195_DLY_RXC_ENABLE, !!mac_delay->rx_delay);
357 delay_val |= FIELD_PREP(MT8195_DLY_RXC_STAGES, mac_delay->rx_delay);
358 delay_val |= FIELD_PREP(MT8195_DLY_RXC_INV, mac_delay->rx_inv);
359 break;
360 case PHY_INTERFACE_MODE_RMII:
361 if (plat->rmii_clk_from_mac) {
362 /* case 1: mac provides the rmii reference clock,
363 * and the clock output to TXC pin.
364 * The egress timing can be adjusted by RMII_TXC delay macro circuit.
365 * The ingress timing can be adjusted by RMII_RXC delay macro circuit.
366 */
367 rmii_delay_val |= FIELD_PREP(MT8195_DLY_RMII_TXC_ENABLE,
368 !!mac_delay->tx_delay);
369 rmii_delay_val |= FIELD_PREP(MT8195_DLY_RMII_TXC_STAGES,
370 mac_delay->tx_delay);
371 rmii_delay_val |= FIELD_PREP(MT8195_DLY_RMII_TXC_INV,
372 mac_delay->tx_inv);
373
374 rmii_delay_val |= FIELD_PREP(MT8195_DLY_RMII_RXC_ENABLE,
375 !!mac_delay->rx_delay);
376 rmii_delay_val |= FIELD_PREP(MT8195_DLY_RMII_RXC_STAGES,
377 mac_delay->rx_delay);
378 rmii_delay_val |= FIELD_PREP(MT8195_DLY_RMII_RXC_INV,
379 mac_delay->rx_inv);
380 } else {
381 /* case 2: the rmii reference clock is from external phy,
382 * and the property "rmii_rxc" indicates which pin(TXC/RXC)
383 * the reference clk is connected to. The reference clock is a
384 * received signal, so rx_delay/rx_inv are used to indicate
385 * the reference clock timing adjustment
386 */
387 if (plat->rmii_rxc) {
388 /* the rmii reference clock from outside is connected
389 * to RXC pin, the reference clock will be adjusted
390 * by RXC delay macro circuit.
391 */
392 delay_val |= FIELD_PREP(MT8195_DLY_RXC_ENABLE,
393 !!mac_delay->rx_delay);
394 delay_val |= FIELD_PREP(MT8195_DLY_RXC_STAGES,
395 mac_delay->rx_delay);
396 delay_val |= FIELD_PREP(MT8195_DLY_RXC_INV,
397 mac_delay->rx_inv);
398 } else {
399 /* the rmii reference clock from outside is connected
400 * to TXC pin, the reference clock will be adjusted
401 * by TXC delay macro circuit.
402 */
403 delay_val |= FIELD_PREP(MT8195_DLY_TXC_ENABLE,
404 !!mac_delay->rx_delay);
405 delay_val |= FIELD_PREP(MT8195_DLY_TXC_STAGES,
406 mac_delay->rx_delay);
407 delay_val |= FIELD_PREP(MT8195_DLY_TXC_INV,
408 mac_delay->rx_inv);
409 }
410 }
411 break;
412 case PHY_INTERFACE_MODE_RGMII:
413 case PHY_INTERFACE_MODE_RGMII_TXID:
414 case PHY_INTERFACE_MODE_RGMII_RXID:
415 case PHY_INTERFACE_MODE_RGMII_ID:
416 gtxc_delay_val |= FIELD_PREP(MT8195_DLY_GTXC_ENABLE, !!mac_delay->tx_delay);
417 gtxc_delay_val |= FIELD_PREP(MT8195_DLY_GTXC_STAGES, mac_delay->tx_delay);
418 gtxc_delay_val |= FIELD_PREP(MT8195_DLY_GTXC_INV, mac_delay->tx_inv);
419
420 delay_val |= FIELD_PREP(MT8195_DLY_RXC_ENABLE, !!mac_delay->rx_delay);
421 delay_val |= FIELD_PREP(MT8195_DLY_RXC_STAGES, mac_delay->rx_delay);
422 delay_val |= FIELD_PREP(MT8195_DLY_RXC_INV, mac_delay->rx_inv);
423
424 break;
425 default:
426 dev_err(plat->dev, "phy interface not supported\n");
427 return -EINVAL;
428 }
429
430 regmap_update_bits(plat->peri_regmap,
431 MT8195_PERI_ETH_CTRL0,
432 MT8195_RGMII_TXC_PHASE_CTRL |
433 MT8195_DLY_GTXC_INV |
434 MT8195_DLY_GTXC_ENABLE |
435 MT8195_DLY_GTXC_STAGES,
436 gtxc_delay_val);
437 regmap_write(plat->peri_regmap, MT8195_PERI_ETH_CTRL1, delay_val);
438 regmap_write(plat->peri_regmap, MT8195_PERI_ETH_CTRL2, rmii_delay_val);
439
440 mt8195_delay_stage2ps(plat);
441
442 return 0;
443 }
444
445 static const struct mediatek_dwmac_variant mt8195_gmac_variant = {
446 .dwmac_set_phy_interface = mt8195_set_interface,
447 .dwmac_set_delay = mt8195_set_delay,
448 .clk_list = mt8195_dwmac_clk_l,
449 .num_clks = ARRAY_SIZE(mt8195_dwmac_clk_l),
450 .dma_bit_mask = 35,
451 .rx_delay_max = 9280,
452 .tx_delay_max = 9280,
453 };
454
mediatek_dwmac_config_dt(struct mediatek_dwmac_plat_data * plat)455 static int mediatek_dwmac_config_dt(struct mediatek_dwmac_plat_data *plat)
456 {
457 struct mac_delay_struct *mac_delay = &plat->mac_delay;
458 u32 tx_delay_ps, rx_delay_ps;
459 int err;
460
461 plat->peri_regmap = syscon_regmap_lookup_by_phandle(plat->np, "mediatek,pericfg");
462 if (IS_ERR(plat->peri_regmap)) {
463 dev_err(plat->dev, "Failed to get pericfg syscon\n");
464 return PTR_ERR(plat->peri_regmap);
465 }
466
467 err = of_get_phy_mode(plat->np, &plat->phy_mode);
468 if (err) {
469 dev_err(plat->dev, "not find phy-mode\n");
470 return err;
471 }
472
473 if (!of_property_read_u32(plat->np, "mediatek,tx-delay-ps", &tx_delay_ps)) {
474 if (tx_delay_ps < plat->variant->tx_delay_max) {
475 mac_delay->tx_delay = tx_delay_ps;
476 } else {
477 dev_err(plat->dev, "Invalid TX clock delay: %dps\n", tx_delay_ps);
478 return -EINVAL;
479 }
480 }
481
482 if (!of_property_read_u32(plat->np, "mediatek,rx-delay-ps", &rx_delay_ps)) {
483 if (rx_delay_ps < plat->variant->rx_delay_max) {
484 mac_delay->rx_delay = rx_delay_ps;
485 } else {
486 dev_err(plat->dev, "Invalid RX clock delay: %dps\n", rx_delay_ps);
487 return -EINVAL;
488 }
489 }
490
491 mac_delay->tx_inv = of_property_read_bool(plat->np, "mediatek,txc-inverse");
492 mac_delay->rx_inv = of_property_read_bool(plat->np, "mediatek,rxc-inverse");
493 plat->rmii_rxc = of_property_read_bool(plat->np, "mediatek,rmii-rxc");
494 plat->rmii_clk_from_mac = of_property_read_bool(plat->np, "mediatek,rmii-clk-from-mac");
495 plat->mac_wol = of_property_read_bool(plat->np, "mediatek,mac-wol");
496
497 return 0;
498 }
499
mediatek_dwmac_clk_init(struct mediatek_dwmac_plat_data * plat)500 static int mediatek_dwmac_clk_init(struct mediatek_dwmac_plat_data *plat)
501 {
502 const struct mediatek_dwmac_variant *variant = plat->variant;
503 int i, ret;
504
505 plat->clks = devm_kcalloc(plat->dev, variant->num_clks, sizeof(*plat->clks), GFP_KERNEL);
506 if (!plat->clks)
507 return -ENOMEM;
508
509 for (i = 0; i < variant->num_clks; i++)
510 plat->clks[i].id = variant->clk_list[i];
511
512 ret = devm_clk_bulk_get(plat->dev, variant->num_clks, plat->clks);
513 if (ret)
514 return ret;
515
516 /* The clock labeled as "rmii_internal" is needed only in RMII(when
517 * MAC provides the reference clock), and useless for RGMII/MII or
518 * RMII(when PHY provides the reference clock).
519 * So, "rmii_internal" clock is got and configured only when
520 * reference clock of RMII is from MAC.
521 */
522 if (plat->rmii_clk_from_mac) {
523 plat->rmii_internal_clk = devm_clk_get(plat->dev, "rmii_internal");
524 if (IS_ERR(plat->rmii_internal_clk))
525 ret = PTR_ERR(plat->rmii_internal_clk);
526 } else {
527 plat->rmii_internal_clk = NULL;
528 }
529
530 return ret;
531 }
532
mediatek_dwmac_init(struct platform_device * pdev,void * priv)533 static int mediatek_dwmac_init(struct platform_device *pdev, void *priv)
534 {
535 struct mediatek_dwmac_plat_data *plat = priv;
536 const struct mediatek_dwmac_variant *variant = plat->variant;
537 int ret;
538
539 if (variant->dwmac_set_phy_interface) {
540 ret = variant->dwmac_set_phy_interface(plat);
541 if (ret) {
542 dev_err(plat->dev, "failed to set phy interface, err = %d\n", ret);
543 return ret;
544 }
545 }
546
547 if (variant->dwmac_set_delay) {
548 ret = variant->dwmac_set_delay(plat);
549 if (ret) {
550 dev_err(plat->dev, "failed to set delay value, err = %d\n", ret);
551 return ret;
552 }
553 }
554
555 return 0;
556 }
557
mediatek_dwmac_clks_config(void * priv,bool enabled)558 static int mediatek_dwmac_clks_config(void *priv, bool enabled)
559 {
560 struct mediatek_dwmac_plat_data *plat = priv;
561 const struct mediatek_dwmac_variant *variant = plat->variant;
562 int ret = 0;
563
564 if (enabled) {
565 ret = clk_bulk_prepare_enable(variant->num_clks, plat->clks);
566 if (ret) {
567 dev_err(plat->dev, "failed to enable clks, err = %d\n", ret);
568 return ret;
569 }
570
571 ret = clk_prepare_enable(plat->rmii_internal_clk);
572 if (ret) {
573 dev_err(plat->dev, "failed to enable rmii internal clk, err = %d\n", ret);
574 return ret;
575 }
576 } else {
577 clk_disable_unprepare(plat->rmii_internal_clk);
578 clk_bulk_disable_unprepare(variant->num_clks, plat->clks);
579 }
580
581 return ret;
582 }
583
mediatek_dwmac_common_data(struct platform_device * pdev,struct plat_stmmacenet_data * plat,struct mediatek_dwmac_plat_data * priv_plat)584 static int mediatek_dwmac_common_data(struct platform_device *pdev,
585 struct plat_stmmacenet_data *plat,
586 struct mediatek_dwmac_plat_data *priv_plat)
587 {
588 int i;
589
590 plat->mac_interface = priv_plat->phy_mode;
591 if (priv_plat->mac_wol)
592 plat->flags |= STMMAC_FLAG_USE_PHY_WOL;
593 else
594 plat->flags &= ~STMMAC_FLAG_USE_PHY_WOL;
595 plat->riwt_off = 1;
596 plat->maxmtu = ETH_DATA_LEN;
597 plat->host_dma_width = priv_plat->variant->dma_bit_mask;
598 plat->bsp_priv = priv_plat;
599 plat->init = mediatek_dwmac_init;
600 plat->clks_config = mediatek_dwmac_clks_config;
601
602 plat->safety_feat_cfg = devm_kzalloc(&pdev->dev,
603 sizeof(*plat->safety_feat_cfg),
604 GFP_KERNEL);
605 if (!plat->safety_feat_cfg)
606 return -ENOMEM;
607
608 plat->safety_feat_cfg->tsoee = 1;
609 plat->safety_feat_cfg->mrxpee = 0;
610 plat->safety_feat_cfg->mestee = 1;
611 plat->safety_feat_cfg->mrxee = 1;
612 plat->safety_feat_cfg->mtxee = 1;
613 plat->safety_feat_cfg->epsi = 0;
614 plat->safety_feat_cfg->edpp = 1;
615 plat->safety_feat_cfg->prtyen = 1;
616 plat->safety_feat_cfg->tmouten = 1;
617
618 for (i = 0; i < plat->tx_queues_to_use; i++) {
619 /* Default TX Q0 to use TSO and rest TXQ for TBS */
620 if (i > 0)
621 plat->tx_queues_cfg[i].tbs_en = 1;
622 }
623
624 return 0;
625 }
626
mediatek_dwmac_probe(struct platform_device * pdev)627 static int mediatek_dwmac_probe(struct platform_device *pdev)
628 {
629 struct mediatek_dwmac_plat_data *priv_plat;
630 struct plat_stmmacenet_data *plat_dat;
631 struct stmmac_resources stmmac_res;
632 int ret;
633
634 priv_plat = devm_kzalloc(&pdev->dev, sizeof(*priv_plat), GFP_KERNEL);
635 if (!priv_plat)
636 return -ENOMEM;
637
638 priv_plat->variant = of_device_get_match_data(&pdev->dev);
639 if (!priv_plat->variant) {
640 dev_err(&pdev->dev, "Missing dwmac-mediatek variant\n");
641 return -EINVAL;
642 }
643
644 priv_plat->dev = &pdev->dev;
645 priv_plat->np = pdev->dev.of_node;
646
647 ret = mediatek_dwmac_config_dt(priv_plat);
648 if (ret)
649 return ret;
650
651 ret = mediatek_dwmac_clk_init(priv_plat);
652 if (ret)
653 return ret;
654
655 ret = stmmac_get_platform_resources(pdev, &stmmac_res);
656 if (ret)
657 return ret;
658
659 plat_dat = stmmac_probe_config_dt(pdev, stmmac_res.mac);
660 if (IS_ERR(plat_dat))
661 return PTR_ERR(plat_dat);
662
663 mediatek_dwmac_common_data(pdev, plat_dat, priv_plat);
664 mediatek_dwmac_init(pdev, priv_plat);
665
666 ret = mediatek_dwmac_clks_config(priv_plat, true);
667 if (ret)
668 goto err_remove_config_dt;
669
670 ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
671 if (ret)
672 goto err_drv_probe;
673
674 return 0;
675
676 err_drv_probe:
677 mediatek_dwmac_clks_config(priv_plat, false);
678 err_remove_config_dt:
679 stmmac_remove_config_dt(pdev, plat_dat);
680
681 return ret;
682 }
683
mediatek_dwmac_remove(struct platform_device * pdev)684 static void mediatek_dwmac_remove(struct platform_device *pdev)
685 {
686 struct mediatek_dwmac_plat_data *priv_plat = get_stmmac_bsp_priv(&pdev->dev);
687
688 stmmac_pltfr_remove(pdev);
689 mediatek_dwmac_clks_config(priv_plat, false);
690 }
691
692 static const struct of_device_id mediatek_dwmac_match[] = {
693 { .compatible = "mediatek,mt2712-gmac",
694 .data = &mt2712_gmac_variant },
695 { .compatible = "mediatek,mt8195-gmac",
696 .data = &mt8195_gmac_variant },
697 { }
698 };
699
700 MODULE_DEVICE_TABLE(of, mediatek_dwmac_match);
701
702 static struct platform_driver mediatek_dwmac_driver = {
703 .probe = mediatek_dwmac_probe,
704 .remove_new = mediatek_dwmac_remove,
705 .driver = {
706 .name = "dwmac-mediatek",
707 .pm = &stmmac_pltfr_pm_ops,
708 .of_match_table = mediatek_dwmac_match,
709 },
710 };
711 module_platform_driver(mediatek_dwmac_driver);
712
713 MODULE_AUTHOR("Biao Huang <biao.huang@mediatek.com>");
714 MODULE_DESCRIPTION("MediaTek DWMAC specific glue layer");
715 MODULE_LICENSE("GPL v2");
716