1 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
2 /*
3 * SerDes PHY driver for Microsemi Ocelot
4 *
5 * Copyright (c) 2018 Microsemi
6 *
7 */
8
9 #include <linux/err.h>
10 #include <linux/mfd/syscon.h>
11 #include <linux/module.h>
12 #include <linux/of.h>
13 #include <linux/of_platform.h>
14 #include <linux/phy.h>
15 #include <linux/phy/phy.h>
16 #include <linux/platform_device.h>
17 #include <linux/regmap.h>
18 #include <soc/mscc/ocelot_hsio.h>
19 #include <dt-bindings/phy/phy-ocelot-serdes.h>
20
21 struct serdes_ctrl {
22 struct regmap *regs;
23 struct device *dev;
24 struct phy *phys[SERDES_MAX];
25 };
26
27 struct serdes_macro {
28 u8 idx;
29 /* Not used when in QSGMII or PCIe mode */
30 int port;
31 struct serdes_ctrl *ctrl;
32 };
33
34 #define MCB_S6G_CFG_TIMEOUT 50
35
__serdes_write_mcb_s6g(struct regmap * regmap,u8 macro,u32 op)36 static int __serdes_write_mcb_s6g(struct regmap *regmap, u8 macro, u32 op)
37 {
38 unsigned int regval = 0;
39
40 regmap_write(regmap, HSIO_MCB_S6G_ADDR_CFG, op |
41 HSIO_MCB_S6G_ADDR_CFG_SERDES6G_ADDR(BIT(macro)));
42
43 return regmap_read_poll_timeout(regmap, HSIO_MCB_S6G_ADDR_CFG, regval,
44 (regval & op) != op, 100,
45 MCB_S6G_CFG_TIMEOUT * 1000);
46 }
47
serdes_commit_mcb_s6g(struct regmap * regmap,u8 macro)48 static int serdes_commit_mcb_s6g(struct regmap *regmap, u8 macro)
49 {
50 return __serdes_write_mcb_s6g(regmap, macro,
51 HSIO_MCB_S6G_ADDR_CFG_SERDES6G_WR_ONE_SHOT);
52 }
53
serdes_update_mcb_s6g(struct regmap * regmap,u8 macro)54 static int serdes_update_mcb_s6g(struct regmap *regmap, u8 macro)
55 {
56 return __serdes_write_mcb_s6g(regmap, macro,
57 HSIO_MCB_S6G_ADDR_CFG_SERDES6G_RD_ONE_SHOT);
58 }
59
serdes_init_s6g(struct regmap * regmap,u8 serdes,int mode)60 static int serdes_init_s6g(struct regmap *regmap, u8 serdes, int mode)
61 {
62 u32 pll_fsm_ctrl_data;
63 u32 ob_ena1v_mode;
64 u32 des_bw_ana;
65 u32 ob_ena_cas;
66 u32 if_mode;
67 u32 ob_lev;
68 u32 qrate;
69 int ret;
70
71 if (mode == PHY_INTERFACE_MODE_QSGMII) {
72 pll_fsm_ctrl_data = 120;
73 ob_ena1v_mode = 0;
74 ob_ena_cas = 0;
75 des_bw_ana = 5;
76 ob_lev = 24;
77 if_mode = 3;
78 qrate = 0;
79 } else {
80 pll_fsm_ctrl_data = 60;
81 ob_ena1v_mode = 1;
82 ob_ena_cas = 2;
83 des_bw_ana = 3;
84 ob_lev = 48;
85 if_mode = 1;
86 qrate = 1;
87 }
88
89 ret = serdes_update_mcb_s6g(regmap, serdes);
90 if (ret)
91 return ret;
92
93 /* Test pattern */
94
95 regmap_update_bits(regmap, HSIO_S6G_COMMON_CFG,
96 HSIO_S6G_COMMON_CFG_SYS_RST, 0);
97
98 regmap_update_bits(regmap, HSIO_S6G_PLL_CFG,
99 HSIO_S6G_PLL_CFG_PLL_FSM_ENA, 0);
100
101 regmap_update_bits(regmap, HSIO_S6G_IB_CFG,
102 HSIO_S6G_IB_CFG_IB_SIG_DET_ENA |
103 HSIO_S6G_IB_CFG_IB_REG_ENA |
104 HSIO_S6G_IB_CFG_IB_SAM_ENA |
105 HSIO_S6G_IB_CFG_IB_EQZ_ENA |
106 HSIO_S6G_IB_CFG_IB_CONCUR |
107 HSIO_S6G_IB_CFG_IB_CAL_ENA,
108 HSIO_S6G_IB_CFG_IB_SIG_DET_ENA |
109 HSIO_S6G_IB_CFG_IB_REG_ENA |
110 HSIO_S6G_IB_CFG_IB_SAM_ENA |
111 HSIO_S6G_IB_CFG_IB_EQZ_ENA |
112 HSIO_S6G_IB_CFG_IB_CONCUR);
113
114 regmap_update_bits(regmap, HSIO_S6G_IB_CFG1,
115 HSIO_S6G_IB_CFG1_IB_FRC_OFFSET |
116 HSIO_S6G_IB_CFG1_IB_FRC_LP |
117 HSIO_S6G_IB_CFG1_IB_FRC_MID |
118 HSIO_S6G_IB_CFG1_IB_FRC_HP |
119 HSIO_S6G_IB_CFG1_IB_FILT_OFFSET |
120 HSIO_S6G_IB_CFG1_IB_FILT_LP |
121 HSIO_S6G_IB_CFG1_IB_FILT_MID |
122 HSIO_S6G_IB_CFG1_IB_FILT_HP,
123 HSIO_S6G_IB_CFG1_IB_FILT_OFFSET |
124 HSIO_S6G_IB_CFG1_IB_FILT_HP |
125 HSIO_S6G_IB_CFG1_IB_FILT_LP |
126 HSIO_S6G_IB_CFG1_IB_FILT_MID);
127
128 regmap_update_bits(regmap, HSIO_S6G_IB_CFG2,
129 HSIO_S6G_IB_CFG2_IB_UREG_M,
130 HSIO_S6G_IB_CFG2_IB_UREG(4));
131
132 regmap_update_bits(regmap, HSIO_S6G_IB_CFG3,
133 HSIO_S6G_IB_CFG3_IB_INI_OFFSET_M |
134 HSIO_S6G_IB_CFG3_IB_INI_LP_M |
135 HSIO_S6G_IB_CFG3_IB_INI_MID_M |
136 HSIO_S6G_IB_CFG3_IB_INI_HP_M,
137 HSIO_S6G_IB_CFG3_IB_INI_OFFSET(31) |
138 HSIO_S6G_IB_CFG3_IB_INI_LP(1) |
139 HSIO_S6G_IB_CFG3_IB_INI_MID(31) |
140 HSIO_S6G_IB_CFG3_IB_INI_HP(0));
141
142 regmap_update_bits(regmap, HSIO_S6G_MISC_CFG,
143 HSIO_S6G_MISC_CFG_LANE_RST,
144 HSIO_S6G_MISC_CFG_LANE_RST);
145
146 ret = serdes_commit_mcb_s6g(regmap, serdes);
147 if (ret)
148 return ret;
149
150 /* OB + DES + IB + SER CFG */
151 regmap_update_bits(regmap, HSIO_S6G_OB_CFG,
152 HSIO_S6G_OB_CFG_OB_IDLE |
153 HSIO_S6G_OB_CFG_OB_ENA1V_MODE |
154 HSIO_S6G_OB_CFG_OB_POST0_M |
155 HSIO_S6G_OB_CFG_OB_PREC_M,
156 (ob_ena1v_mode ? HSIO_S6G_OB_CFG_OB_ENA1V_MODE : 0) |
157 HSIO_S6G_OB_CFG_OB_POST0(0) |
158 HSIO_S6G_OB_CFG_OB_PREC(0));
159
160 regmap_update_bits(regmap, HSIO_S6G_OB_CFG1,
161 HSIO_S6G_OB_CFG1_OB_ENA_CAS_M |
162 HSIO_S6G_OB_CFG1_OB_LEV_M,
163 HSIO_S6G_OB_CFG1_OB_LEV(ob_lev) |
164 HSIO_S6G_OB_CFG1_OB_ENA_CAS(ob_ena_cas));
165
166 regmap_update_bits(regmap, HSIO_S6G_DES_CFG,
167 HSIO_S6G_DES_CFG_DES_PHS_CTRL_M |
168 HSIO_S6G_DES_CFG_DES_CPMD_SEL_M |
169 HSIO_S6G_DES_CFG_DES_BW_ANA_M,
170 HSIO_S6G_DES_CFG_DES_PHS_CTRL(2) |
171 HSIO_S6G_DES_CFG_DES_CPMD_SEL(0) |
172 HSIO_S6G_DES_CFG_DES_BW_ANA(des_bw_ana));
173
174 regmap_update_bits(regmap, HSIO_S6G_IB_CFG,
175 HSIO_S6G_IB_CFG_IB_SIG_DET_CLK_SEL_M |
176 HSIO_S6G_IB_CFG_IB_REG_PAT_SEL_OFFSET_M,
177 HSIO_S6G_IB_CFG_IB_REG_PAT_SEL_OFFSET(0) |
178 HSIO_S6G_IB_CFG_IB_SIG_DET_CLK_SEL(0));
179
180 regmap_update_bits(regmap, HSIO_S6G_IB_CFG1,
181 HSIO_S6G_IB_CFG1_IB_TSDET_M,
182 HSIO_S6G_IB_CFG1_IB_TSDET(16));
183
184 regmap_update_bits(regmap, HSIO_S6G_SER_CFG,
185 HSIO_S6G_SER_CFG_SER_ALISEL_M |
186 HSIO_S6G_SER_CFG_SER_ENALI,
187 HSIO_S6G_SER_CFG_SER_ALISEL(0));
188
189 regmap_update_bits(regmap, HSIO_S6G_PLL_CFG,
190 HSIO_S6G_PLL_CFG_PLL_DIV4 |
191 HSIO_S6G_PLL_CFG_PLL_ENA_ROT |
192 HSIO_S6G_PLL_CFG_PLL_FSM_CTRL_DATA_M |
193 HSIO_S6G_PLL_CFG_PLL_ROT_DIR |
194 HSIO_S6G_PLL_CFG_PLL_ROT_FRQ,
195 HSIO_S6G_PLL_CFG_PLL_FSM_CTRL_DATA
196 (pll_fsm_ctrl_data));
197
198 regmap_update_bits(regmap, HSIO_S6G_COMMON_CFG,
199 HSIO_S6G_COMMON_CFG_SYS_RST |
200 HSIO_S6G_COMMON_CFG_ENA_LANE |
201 HSIO_S6G_COMMON_CFG_PWD_RX |
202 HSIO_S6G_COMMON_CFG_PWD_TX |
203 HSIO_S6G_COMMON_CFG_HRATE |
204 HSIO_S6G_COMMON_CFG_QRATE |
205 HSIO_S6G_COMMON_CFG_ENA_ELOOP |
206 HSIO_S6G_COMMON_CFG_ENA_FLOOP |
207 HSIO_S6G_COMMON_CFG_IF_MODE_M,
208 HSIO_S6G_COMMON_CFG_SYS_RST |
209 HSIO_S6G_COMMON_CFG_ENA_LANE |
210 (qrate ? HSIO_S6G_COMMON_CFG_QRATE : 0) |
211 HSIO_S6G_COMMON_CFG_IF_MODE(if_mode));
212
213 regmap_update_bits(regmap, HSIO_S6G_MISC_CFG,
214 HSIO_S6G_MISC_CFG_LANE_RST |
215 HSIO_S6G_MISC_CFG_DES_100FX_CPMD_ENA |
216 HSIO_S6G_MISC_CFG_RX_LPI_MODE_ENA |
217 HSIO_S6G_MISC_CFG_TX_LPI_MODE_ENA,
218 HSIO_S6G_MISC_CFG_LANE_RST |
219 HSIO_S6G_MISC_CFG_RX_LPI_MODE_ENA);
220
221
222 ret = serdes_commit_mcb_s6g(regmap, serdes);
223 if (ret)
224 return ret;
225
226 regmap_update_bits(regmap, HSIO_S6G_PLL_CFG,
227 HSIO_S6G_PLL_CFG_PLL_FSM_ENA,
228 HSIO_S6G_PLL_CFG_PLL_FSM_ENA);
229
230 ret = serdes_commit_mcb_s6g(regmap, serdes);
231 if (ret)
232 return ret;
233
234 /* Wait for PLL bringup */
235 msleep(20);
236
237 regmap_update_bits(regmap, HSIO_S6G_IB_CFG,
238 HSIO_S6G_IB_CFG_IB_CAL_ENA,
239 HSIO_S6G_IB_CFG_IB_CAL_ENA);
240
241 regmap_update_bits(regmap, HSIO_S6G_MISC_CFG,
242 HSIO_S6G_MISC_CFG_LANE_RST, 0);
243
244 ret = serdes_commit_mcb_s6g(regmap, serdes);
245 if (ret)
246 return ret;
247
248 /* Wait for calibration */
249 msleep(60);
250
251 regmap_update_bits(regmap, HSIO_S6G_IB_CFG,
252 HSIO_S6G_IB_CFG_IB_REG_PAT_SEL_OFFSET_M |
253 HSIO_S6G_IB_CFG_IB_SIG_DET_CLK_SEL_M,
254 HSIO_S6G_IB_CFG_IB_REG_PAT_SEL_OFFSET(0) |
255 HSIO_S6G_IB_CFG_IB_SIG_DET_CLK_SEL(7));
256
257 regmap_update_bits(regmap, HSIO_S6G_IB_CFG1,
258 HSIO_S6G_IB_CFG1_IB_TSDET_M,
259 HSIO_S6G_IB_CFG1_IB_TSDET(3));
260
261 /* IB CFG */
262
263 return 0;
264 }
265
266 #define MCB_S1G_CFG_TIMEOUT 50
267
__serdes_write_mcb_s1g(struct regmap * regmap,u8 macro,u32 op)268 static int __serdes_write_mcb_s1g(struct regmap *regmap, u8 macro, u32 op)
269 {
270 unsigned int regval;
271
272 regmap_write(regmap, HSIO_MCB_S1G_ADDR_CFG, op |
273 HSIO_MCB_S1G_ADDR_CFG_SERDES1G_ADDR(BIT(macro)));
274
275 return regmap_read_poll_timeout(regmap, HSIO_MCB_S1G_ADDR_CFG, regval,
276 (regval & op) != op, 100,
277 MCB_S1G_CFG_TIMEOUT * 1000);
278 }
279
serdes_commit_mcb_s1g(struct regmap * regmap,u8 macro)280 static int serdes_commit_mcb_s1g(struct regmap *regmap, u8 macro)
281 {
282 return __serdes_write_mcb_s1g(regmap, macro,
283 HSIO_MCB_S1G_ADDR_CFG_SERDES1G_WR_ONE_SHOT);
284 }
285
serdes_update_mcb_s1g(struct regmap * regmap,u8 macro)286 static int serdes_update_mcb_s1g(struct regmap *regmap, u8 macro)
287 {
288 return __serdes_write_mcb_s1g(regmap, macro,
289 HSIO_MCB_S1G_ADDR_CFG_SERDES1G_RD_ONE_SHOT);
290 }
291
serdes_init_s1g(struct regmap * regmap,u8 serdes)292 static int serdes_init_s1g(struct regmap *regmap, u8 serdes)
293 {
294 int ret;
295
296 ret = serdes_update_mcb_s1g(regmap, serdes);
297 if (ret)
298 return ret;
299
300 regmap_update_bits(regmap, HSIO_S1G_COMMON_CFG,
301 HSIO_S1G_COMMON_CFG_SYS_RST |
302 HSIO_S1G_COMMON_CFG_ENA_LANE |
303 HSIO_S1G_COMMON_CFG_ENA_ELOOP |
304 HSIO_S1G_COMMON_CFG_ENA_FLOOP,
305 HSIO_S1G_COMMON_CFG_ENA_LANE);
306
307 regmap_update_bits(regmap, HSIO_S1G_PLL_CFG,
308 HSIO_S1G_PLL_CFG_PLL_FSM_ENA |
309 HSIO_S1G_PLL_CFG_PLL_FSM_CTRL_DATA_M,
310 HSIO_S1G_PLL_CFG_PLL_FSM_CTRL_DATA(200) |
311 HSIO_S1G_PLL_CFG_PLL_FSM_ENA);
312
313 regmap_update_bits(regmap, HSIO_S1G_MISC_CFG,
314 HSIO_S1G_MISC_CFG_DES_100FX_CPMD_ENA |
315 HSIO_S1G_MISC_CFG_LANE_RST,
316 HSIO_S1G_MISC_CFG_LANE_RST);
317
318 ret = serdes_commit_mcb_s1g(regmap, serdes);
319 if (ret)
320 return ret;
321
322 regmap_update_bits(regmap, HSIO_S1G_COMMON_CFG,
323 HSIO_S1G_COMMON_CFG_SYS_RST,
324 HSIO_S1G_COMMON_CFG_SYS_RST);
325
326 regmap_update_bits(regmap, HSIO_S1G_MISC_CFG,
327 HSIO_S1G_MISC_CFG_LANE_RST, 0);
328
329 ret = serdes_commit_mcb_s1g(regmap, serdes);
330 if (ret)
331 return ret;
332
333 return 0;
334 }
335
336 struct serdes_mux {
337 u8 idx;
338 u8 port;
339 enum phy_mode mode;
340 int submode;
341 u32 mask;
342 u32 mux;
343 };
344
345 #define SERDES_MUX(_idx, _port, _mode, _submode, _mask, _mux) { \
346 .idx = _idx, \
347 .port = _port, \
348 .mode = _mode, \
349 .submode = _submode, \
350 .mask = _mask, \
351 .mux = _mux, \
352 }
353
354 #define SERDES_MUX_SGMII(i, p, m, c) \
355 SERDES_MUX(i, p, PHY_MODE_ETHERNET, PHY_INTERFACE_MODE_SGMII, m, c)
356 #define SERDES_MUX_QSGMII(i, p, m, c) \
357 SERDES_MUX(i, p, PHY_MODE_ETHERNET, PHY_INTERFACE_MODE_QSGMII, m, c)
358
359 static const struct serdes_mux ocelot_serdes_muxes[] = {
360 SERDES_MUX_SGMII(SERDES1G(0), 0, 0, 0),
361 SERDES_MUX_SGMII(SERDES1G(1), 1, HSIO_HW_CFG_DEV1G_5_MODE, 0),
362 SERDES_MUX_SGMII(SERDES1G(1), 5, HSIO_HW_CFG_QSGMII_ENA |
363 HSIO_HW_CFG_DEV1G_5_MODE, HSIO_HW_CFG_DEV1G_5_MODE),
364 SERDES_MUX_SGMII(SERDES1G(2), 2, HSIO_HW_CFG_DEV1G_4_MODE, 0),
365 SERDES_MUX_SGMII(SERDES1G(2), 4, HSIO_HW_CFG_QSGMII_ENA |
366 HSIO_HW_CFG_DEV1G_4_MODE, HSIO_HW_CFG_DEV1G_4_MODE),
367 SERDES_MUX_SGMII(SERDES1G(3), 3, HSIO_HW_CFG_DEV1G_6_MODE, 0),
368 SERDES_MUX_SGMII(SERDES1G(3), 6, HSIO_HW_CFG_QSGMII_ENA |
369 HSIO_HW_CFG_DEV1G_6_MODE, HSIO_HW_CFG_DEV1G_6_MODE),
370 SERDES_MUX_SGMII(SERDES1G(4), 4, HSIO_HW_CFG_QSGMII_ENA |
371 HSIO_HW_CFG_DEV1G_4_MODE | HSIO_HW_CFG_DEV1G_9_MODE,
372 0),
373 SERDES_MUX_SGMII(SERDES1G(4), 9, HSIO_HW_CFG_DEV1G_4_MODE |
374 HSIO_HW_CFG_DEV1G_9_MODE, HSIO_HW_CFG_DEV1G_4_MODE |
375 HSIO_HW_CFG_DEV1G_9_MODE),
376 SERDES_MUX_SGMII(SERDES1G(5), 5, HSIO_HW_CFG_QSGMII_ENA |
377 HSIO_HW_CFG_DEV1G_5_MODE | HSIO_HW_CFG_DEV2G5_10_MODE,
378 0),
379 SERDES_MUX_SGMII(SERDES1G(5), 10, HSIO_HW_CFG_PCIE_ENA |
380 HSIO_HW_CFG_DEV1G_5_MODE | HSIO_HW_CFG_DEV2G5_10_MODE,
381 HSIO_HW_CFG_DEV1G_5_MODE | HSIO_HW_CFG_DEV2G5_10_MODE),
382 SERDES_MUX_QSGMII(SERDES6G(0), 4, HSIO_HW_CFG_QSGMII_ENA,
383 HSIO_HW_CFG_QSGMII_ENA),
384 SERDES_MUX_QSGMII(SERDES6G(0), 5, HSIO_HW_CFG_QSGMII_ENA,
385 HSIO_HW_CFG_QSGMII_ENA),
386 SERDES_MUX_QSGMII(SERDES6G(0), 6, HSIO_HW_CFG_QSGMII_ENA,
387 HSIO_HW_CFG_QSGMII_ENA),
388 SERDES_MUX_SGMII(SERDES6G(0), 7, HSIO_HW_CFG_QSGMII_ENA, 0),
389 SERDES_MUX_QSGMII(SERDES6G(0), 7, HSIO_HW_CFG_QSGMII_ENA,
390 HSIO_HW_CFG_QSGMII_ENA),
391 SERDES_MUX_SGMII(SERDES6G(1), 8, 0, 0),
392 SERDES_MUX_SGMII(SERDES6G(2), 10, HSIO_HW_CFG_PCIE_ENA |
393 HSIO_HW_CFG_DEV2G5_10_MODE, 0),
394 SERDES_MUX(SERDES6G(2), 10, PHY_MODE_PCIE, 0, HSIO_HW_CFG_PCIE_ENA,
395 HSIO_HW_CFG_PCIE_ENA),
396 };
397
serdes_set_mode(struct phy * phy,enum phy_mode mode,int submode)398 static int serdes_set_mode(struct phy *phy, enum phy_mode mode, int submode)
399 {
400 struct serdes_macro *macro = phy_get_drvdata(phy);
401 unsigned int i;
402 int ret;
403
404 /* As of now only PHY_MODE_ETHERNET is supported */
405 if (mode != PHY_MODE_ETHERNET)
406 return -EOPNOTSUPP;
407
408 for (i = 0; i < ARRAY_SIZE(ocelot_serdes_muxes); i++) {
409 if (macro->idx != ocelot_serdes_muxes[i].idx ||
410 mode != ocelot_serdes_muxes[i].mode ||
411 submode != ocelot_serdes_muxes[i].submode)
412 continue;
413
414 if (submode != PHY_INTERFACE_MODE_QSGMII &&
415 macro->port != ocelot_serdes_muxes[i].port)
416 continue;
417
418 ret = regmap_update_bits(macro->ctrl->regs, HSIO_HW_CFG,
419 ocelot_serdes_muxes[i].mask,
420 ocelot_serdes_muxes[i].mux);
421 if (ret)
422 return ret;
423
424 if (macro->idx <= SERDES1G_MAX)
425 return serdes_init_s1g(macro->ctrl->regs, macro->idx);
426 else if (macro->idx <= SERDES6G_MAX)
427 return serdes_init_s6g(macro->ctrl->regs,
428 macro->idx - (SERDES1G_MAX + 1),
429 ocelot_serdes_muxes[i].submode);
430
431 /* PCIe not supported yet */
432 return -EOPNOTSUPP;
433 }
434
435 return -EINVAL;
436 }
437
438 static const struct phy_ops serdes_ops = {
439 .set_mode = serdes_set_mode,
440 .owner = THIS_MODULE,
441 };
442
serdes_simple_xlate(struct device * dev,const struct of_phandle_args * args)443 static struct phy *serdes_simple_xlate(struct device *dev,
444 const struct of_phandle_args *args)
445 {
446 struct serdes_ctrl *ctrl = dev_get_drvdata(dev);
447 unsigned int port, idx, i;
448
449 if (args->args_count != 2)
450 return ERR_PTR(-EINVAL);
451
452 port = args->args[0];
453 idx = args->args[1];
454
455 for (i = 0; i < SERDES_MAX; i++) {
456 struct serdes_macro *macro = phy_get_drvdata(ctrl->phys[i]);
457
458 if (idx != macro->idx)
459 continue;
460
461 /* SERDES6G(0) is the only SerDes capable of QSGMII */
462 if (idx != SERDES6G(0) && macro->port >= 0)
463 return ERR_PTR(-EBUSY);
464
465 macro->port = port;
466 return ctrl->phys[i];
467 }
468
469 return ERR_PTR(-ENODEV);
470 }
471
serdes_phy_create(struct serdes_ctrl * ctrl,u8 idx,struct phy ** phy)472 static int serdes_phy_create(struct serdes_ctrl *ctrl, u8 idx, struct phy **phy)
473 {
474 struct serdes_macro *macro;
475
476 *phy = devm_phy_create(ctrl->dev, NULL, &serdes_ops);
477 if (IS_ERR(*phy))
478 return PTR_ERR(*phy);
479
480 macro = devm_kzalloc(ctrl->dev, sizeof(*macro), GFP_KERNEL);
481 if (!macro)
482 return -ENOMEM;
483
484 macro->idx = idx;
485 macro->ctrl = ctrl;
486 macro->port = -1;
487
488 phy_set_drvdata(*phy, macro);
489
490 return 0;
491 }
492
serdes_probe(struct platform_device * pdev)493 static int serdes_probe(struct platform_device *pdev)
494 {
495 struct phy_provider *provider;
496 struct serdes_ctrl *ctrl;
497 struct resource *res;
498 unsigned int i;
499 int ret;
500
501 ctrl = devm_kzalloc(&pdev->dev, sizeof(*ctrl), GFP_KERNEL);
502 if (!ctrl)
503 return -ENOMEM;
504
505 ctrl->dev = &pdev->dev;
506 ctrl->regs = syscon_node_to_regmap(pdev->dev.parent->of_node);
507 if (IS_ERR(ctrl->regs)) {
508 /* Fall back to using IORESOURCE_REG, if possible */
509 res = platform_get_resource(pdev, IORESOURCE_REG, 0);
510 if (res)
511 ctrl->regs = dev_get_regmap(ctrl->dev->parent,
512 res->name);
513 }
514
515 if (IS_ERR(ctrl->regs))
516 return PTR_ERR(ctrl->regs);
517
518 for (i = 0; i < SERDES_MAX; i++) {
519 ret = serdes_phy_create(ctrl, i, &ctrl->phys[i]);
520 if (ret)
521 return ret;
522 }
523
524 dev_set_drvdata(&pdev->dev, ctrl);
525
526 provider = devm_of_phy_provider_register(ctrl->dev,
527 serdes_simple_xlate);
528
529 return PTR_ERR_OR_ZERO(provider);
530 }
531
532 static const struct of_device_id serdes_ids[] = {
533 { .compatible = "mscc,vsc7514-serdes", },
534 {},
535 };
536 MODULE_DEVICE_TABLE(of, serdes_ids);
537
538 static struct platform_driver mscc_ocelot_serdes = {
539 .probe = serdes_probe,
540 .driver = {
541 .name = "mscc,ocelot-serdes",
542 .of_match_table = of_match_ptr(serdes_ids),
543 },
544 };
545
546 module_platform_driver(mscc_ocelot_serdes);
547
548 MODULE_AUTHOR("Quentin Schulz <quentin.schulz@bootlin.com>");
549 MODULE_DESCRIPTION("SerDes driver for Microsemi Ocelot");
550 MODULE_LICENSE("Dual MIT/GPL");
551