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1// SPDX-License-Identifier: (GPL-2.0 OR MIT)
2/*
3 * Copyright (c) 2018 Synopsys, Inc. and/or its affiliates.
4 * stmmac HW Interface Handling
5 */
6
7#include "common.h"
8#include "stmmac.h"
9#include "stmmac_fpe.h"
10#include "stmmac_ptp.h"
11#include "stmmac_est.h"
12
13static u32 stmmac_get_id(struct stmmac_priv *priv, u32 id_reg)
14{
15 u32 reg = readl(priv->ioaddr + id_reg);
16
17 if (!reg) {
18 dev_info(priv->device, "Version ID not available\n");
19 return 0x0;
20 }
21
22 dev_info(priv->device, "User ID: 0x%x, Synopsys ID: 0x%x\n",
23 (unsigned int)(reg & GENMASK(15, 8)) >> 8,
24 (unsigned int)(reg & GENMASK(7, 0)));
25 return reg & GENMASK(7, 0);
26}
27
28static u32 stmmac_get_dev_id(struct stmmac_priv *priv, u32 id_reg)
29{
30 u32 reg = readl(priv->ioaddr + id_reg);
31
32 if (!reg) {
33 dev_info(priv->device, "Version ID not available\n");
34 return 0x0;
35 }
36
37 return (reg & GENMASK(15, 8)) >> 8;
38}
39
40static void stmmac_dwmac_mode_quirk(struct stmmac_priv *priv)
41{
42 struct mac_device_info *mac = priv->hw;
43
44 if (priv->chain_mode) {
45 dev_info(priv->device, "Chain mode enabled\n");
46 priv->mode = STMMAC_CHAIN_MODE;
47 mac->mode = &chain_mode_ops;
48 } else {
49 dev_info(priv->device, "Ring mode enabled\n");
50 priv->mode = STMMAC_RING_MODE;
51 mac->mode = &ring_mode_ops;
52 }
53}
54
55static int stmmac_dwmac1_quirks(struct stmmac_priv *priv)
56{
57 struct mac_device_info *mac = priv->hw;
58
59 if (priv->plat->enh_desc) {
60 dev_info(priv->device, "Enhanced/Alternate descriptors\n");
61
62 /* GMAC older than 3.50 has no extended descriptors */
63 if (priv->synopsys_id >= DWMAC_CORE_3_50) {
64 dev_info(priv->device, "Enabled extended descriptors\n");
65 priv->extend_desc = 1;
66 } else {
67 dev_warn(priv->device, "Extended descriptors not supported\n");
68 }
69
70 mac->desc = &enh_desc_ops;
71 } else {
72 dev_info(priv->device, "Normal descriptors\n");
73 mac->desc = &ndesc_ops;
74 }
75
76 stmmac_dwmac_mode_quirk(priv);
77 return 0;
78}
79
80static int stmmac_dwmac4_quirks(struct stmmac_priv *priv)
81{
82 stmmac_dwmac_mode_quirk(priv);
83 return 0;
84}
85
86static int stmmac_dwxlgmac_quirks(struct stmmac_priv *priv)
87{
88 priv->hw->xlgmac = true;
89 return 0;
90}
91
92int stmmac_reset(struct stmmac_priv *priv, void __iomem *ioaddr)
93{
94 struct plat_stmmacenet_data *plat = priv ? priv->plat : NULL;
95
96 if (!priv)
97 return -EINVAL;
98
99 if (plat && plat->fix_soc_reset)
100 return plat->fix_soc_reset(plat, ioaddr);
101
102 return stmmac_do_callback(priv, dma, reset, ioaddr);
103}
104
105static const struct stmmac_hwif_entry {
106 bool gmac;
107 bool gmac4;
108 bool xgmac;
109 u32 min_id;
110 u32 dev_id;
111 const struct stmmac_regs_off regs;
112 const void *desc;
113 const void *dma;
114 const void *mac;
115 const void *hwtimestamp;
116 const void *ptp;
117 const void *mode;
118 const void *tc;
119 const void *mmc;
120 const void *est;
121 int (*setup)(struct stmmac_priv *priv);
122 int (*quirks)(struct stmmac_priv *priv);
123} stmmac_hw[] = {
124 /* NOTE: New HW versions shall go to the end of this table */
125 {
126 .gmac = false,
127 .gmac4 = false,
128 .xgmac = false,
129 .min_id = 0,
130 .regs = {
131 .ptp_off = PTP_GMAC3_X_OFFSET,
132 .mmc_off = MMC_GMAC3_X_OFFSET,
133 },
134 .desc = NULL,
135 .dma = &dwmac100_dma_ops,
136 .mac = &dwmac100_ops,
137 .hwtimestamp = &dwmac1000_ptp,
138 .ptp = &dwmac1000_ptp_clock_ops,
139 .mode = NULL,
140 .tc = NULL,
141 .mmc = &dwmac_mmc_ops,
142 .setup = dwmac100_setup,
143 .quirks = stmmac_dwmac1_quirks,
144 }, {
145 .gmac = true,
146 .gmac4 = false,
147 .xgmac = false,
148 .min_id = 0,
149 .regs = {
150 .ptp_off = PTP_GMAC3_X_OFFSET,
151 .mmc_off = MMC_GMAC3_X_OFFSET,
152 },
153 .desc = NULL,
154 .dma = &dwmac1000_dma_ops,
155 .mac = &dwmac1000_ops,
156 .hwtimestamp = &dwmac1000_ptp,
157 .ptp = &dwmac1000_ptp_clock_ops,
158 .mode = NULL,
159 .tc = NULL,
160 .mmc = &dwmac_mmc_ops,
161 .setup = dwmac1000_setup,
162 .quirks = stmmac_dwmac1_quirks,
163 }, {
164 .gmac = false,
165 .gmac4 = true,
166 .xgmac = false,
167 .min_id = 0,
168 .regs = {
169 .ptp_off = PTP_GMAC4_OFFSET,
170 .mmc_off = MMC_GMAC4_OFFSET,
171 .est_off = EST_GMAC4_OFFSET,
172 },
173 .desc = &dwmac4_desc_ops,
174 .dma = &dwmac4_dma_ops,
175 .mac = &dwmac4_ops,
176 .hwtimestamp = &stmmac_ptp,
177 .ptp = &stmmac_ptp_clock_ops,
178 .mode = NULL,
179 .tc = &dwmac4_tc_ops,
180 .mmc = &dwmac_mmc_ops,
181 .est = &dwmac510_est_ops,
182 .setup = dwmac4_setup,
183 .quirks = stmmac_dwmac4_quirks,
184 }, {
185 .gmac = false,
186 .gmac4 = true,
187 .xgmac = false,
188 .min_id = DWMAC_CORE_4_00,
189 .regs = {
190 .ptp_off = PTP_GMAC4_OFFSET,
191 .mmc_off = MMC_GMAC4_OFFSET,
192 .est_off = EST_GMAC4_OFFSET,
193 .fpe_reg = &dwmac5_fpe_reg,
194 },
195 .desc = &dwmac4_desc_ops,
196 .dma = &dwmac4_dma_ops,
197 .mac = &dwmac410_ops,
198 .hwtimestamp = &stmmac_ptp,
199 .ptp = &stmmac_ptp_clock_ops,
200 .mode = &dwmac4_ring_mode_ops,
201 .tc = &dwmac510_tc_ops,
202 .mmc = &dwmac_mmc_ops,
203 .est = &dwmac510_est_ops,
204 .setup = dwmac4_setup,
205 .quirks = NULL,
206 }, {
207 .gmac = false,
208 .gmac4 = true,
209 .xgmac = false,
210 .min_id = DWMAC_CORE_4_10,
211 .regs = {
212 .ptp_off = PTP_GMAC4_OFFSET,
213 .mmc_off = MMC_GMAC4_OFFSET,
214 .est_off = EST_GMAC4_OFFSET,
215 .fpe_reg = &dwmac5_fpe_reg,
216 },
217 .desc = &dwmac4_desc_ops,
218 .dma = &dwmac410_dma_ops,
219 .mac = &dwmac410_ops,
220 .hwtimestamp = &stmmac_ptp,
221 .ptp = &stmmac_ptp_clock_ops,
222 .mode = &dwmac4_ring_mode_ops,
223 .tc = &dwmac510_tc_ops,
224 .mmc = &dwmac_mmc_ops,
225 .est = &dwmac510_est_ops,
226 .setup = dwmac4_setup,
227 .quirks = NULL,
228 }, {
229 .gmac = false,
230 .gmac4 = true,
231 .xgmac = false,
232 .min_id = DWMAC_CORE_5_10,
233 .regs = {
234 .ptp_off = PTP_GMAC4_OFFSET,
235 .mmc_off = MMC_GMAC4_OFFSET,
236 .est_off = EST_GMAC4_OFFSET,
237 .fpe_reg = &dwmac5_fpe_reg,
238 },
239 .desc = &dwmac4_desc_ops,
240 .dma = &dwmac410_dma_ops,
241 .mac = &dwmac510_ops,
242 .hwtimestamp = &stmmac_ptp,
243 .ptp = &stmmac_ptp_clock_ops,
244 .mode = &dwmac4_ring_mode_ops,
245 .tc = &dwmac510_tc_ops,
246 .mmc = &dwmac_mmc_ops,
247 .est = &dwmac510_est_ops,
248 .setup = dwmac4_setup,
249 .quirks = NULL,
250 }, {
251 .gmac = false,
252 .gmac4 = false,
253 .xgmac = true,
254 .min_id = DWXGMAC_CORE_2_10,
255 .dev_id = DWXGMAC_ID,
256 .regs = {
257 .ptp_off = PTP_XGMAC_OFFSET,
258 .mmc_off = MMC_XGMAC_OFFSET,
259 .est_off = EST_XGMAC_OFFSET,
260 .fpe_reg = &dwxgmac3_fpe_reg,
261 },
262 .desc = &dwxgmac210_desc_ops,
263 .dma = &dwxgmac210_dma_ops,
264 .mac = &dwxgmac210_ops,
265 .hwtimestamp = &stmmac_ptp,
266 .ptp = &stmmac_ptp_clock_ops,
267 .mode = NULL,
268 .tc = &dwxgmac_tc_ops,
269 .mmc = &dwxgmac_mmc_ops,
270 .est = &dwmac510_est_ops,
271 .setup = dwxgmac2_setup,
272 .quirks = NULL,
273 }, {
274 .gmac = false,
275 .gmac4 = false,
276 .xgmac = true,
277 .min_id = DWXLGMAC_CORE_2_00,
278 .dev_id = DWXLGMAC_ID,
279 .regs = {
280 .ptp_off = PTP_XGMAC_OFFSET,
281 .mmc_off = MMC_XGMAC_OFFSET,
282 .est_off = EST_XGMAC_OFFSET,
283 .fpe_reg = &dwxgmac3_fpe_reg,
284 },
285 .desc = &dwxgmac210_desc_ops,
286 .dma = &dwxgmac210_dma_ops,
287 .mac = &dwxlgmac2_ops,
288 .hwtimestamp = &stmmac_ptp,
289 .ptp = &stmmac_ptp_clock_ops,
290 .mode = NULL,
291 .tc = &dwxgmac_tc_ops,
292 .mmc = &dwxgmac_mmc_ops,
293 .est = &dwmac510_est_ops,
294 .setup = dwxlgmac2_setup,
295 .quirks = stmmac_dwxlgmac_quirks,
296 },
297};
298
299int stmmac_hwif_init(struct stmmac_priv *priv)
300{
301 bool needs_xgmac = priv->plat->has_xgmac;
302 bool needs_gmac4 = priv->plat->has_gmac4;
303 bool needs_gmac = priv->plat->has_gmac;
304 const struct stmmac_hwif_entry *entry;
305 struct mac_device_info *mac;
306 bool needs_setup = true;
307 u32 id, dev_id = 0;
308 int i, ret;
309
310 if (needs_gmac) {
311 id = stmmac_get_id(priv, GMAC_VERSION);
312 } else if (needs_gmac4 || needs_xgmac) {
313 id = stmmac_get_id(priv, GMAC4_VERSION);
314 if (needs_xgmac)
315 dev_id = stmmac_get_dev_id(priv, GMAC4_VERSION);
316 } else {
317 id = 0;
318 }
319
320 /* Save ID for later use */
321 priv->synopsys_id = id;
322
323 /* Lets assume some safe values first */
324 priv->ptpaddr = priv->ioaddr +
325 (needs_gmac4 ? PTP_GMAC4_OFFSET : PTP_GMAC3_X_OFFSET);
326 priv->mmcaddr = priv->ioaddr +
327 (needs_gmac4 ? MMC_GMAC4_OFFSET : MMC_GMAC3_X_OFFSET);
328 if (needs_gmac4)
329 priv->estaddr = priv->ioaddr + EST_GMAC4_OFFSET;
330 else if (needs_xgmac)
331 priv->estaddr = priv->ioaddr + EST_XGMAC_OFFSET;
332
333 /* Check for HW specific setup first */
334 if (priv->plat->setup) {
335 mac = priv->plat->setup(priv);
336 needs_setup = false;
337 } else {
338 mac = devm_kzalloc(priv->device, sizeof(*mac), GFP_KERNEL);
339 }
340
341 if (!mac)
342 return -ENOMEM;
343
344 /* Fallback to generic HW */
345 for (i = ARRAY_SIZE(stmmac_hw) - 1; i >= 0; i--) {
346 entry = &stmmac_hw[i];
347
348 if (needs_gmac ^ entry->gmac)
349 continue;
350 if (needs_gmac4 ^ entry->gmac4)
351 continue;
352 if (needs_xgmac ^ entry->xgmac)
353 continue;
354 /* Use synopsys_id var because some setups can override this */
355 if (priv->synopsys_id < entry->min_id)
356 continue;
357 if (needs_xgmac && (dev_id ^ entry->dev_id))
358 continue;
359
360 /* Only use generic HW helpers if needed */
361 mac->desc = mac->desc ? : entry->desc;
362 mac->dma = mac->dma ? : entry->dma;
363 mac->mac = mac->mac ? : entry->mac;
364 mac->ptp = mac->ptp ? : entry->hwtimestamp;
365 mac->mode = mac->mode ? : entry->mode;
366 mac->tc = mac->tc ? : entry->tc;
367 mac->mmc = mac->mmc ? : entry->mmc;
368 mac->est = mac->est ? : entry->est;
369
370 priv->hw = mac;
371 priv->fpe_cfg.reg = entry->regs.fpe_reg;
372 priv->ptpaddr = priv->ioaddr + entry->regs.ptp_off;
373 priv->mmcaddr = priv->ioaddr + entry->regs.mmc_off;
374 memcpy(&priv->ptp_clock_ops, entry->ptp,
375 sizeof(struct ptp_clock_info));
376 if (entry->est)
377 priv->estaddr = priv->ioaddr + entry->regs.est_off;
378
379 /* Entry found */
380 if (needs_setup) {
381 ret = entry->setup(priv);
382 if (ret)
383 return ret;
384 }
385
386 /* Save quirks, if needed for posterior use */
387 priv->hwif_quirks = entry->quirks;
388 return 0;
389 }
390
391 dev_err(priv->device, "Failed to find HW IF (id=0x%x, gmac=%d/%d)\n",
392 id, needs_gmac, needs_gmac4);
393 return -EINVAL;
394}