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1 | /* | |
2 | * Micrel PHY drivers | |
3 | * | |
4 | * SPDX-License-Identifier: GPL-2.0+ | |
5 | * | |
6 | * Copyright 2010-2011 Freescale Semiconductor, Inc. | |
7 | * author Andy Fleming | |
8 | * (C) 2012 NetModule AG, David Andrey, added KSZ9031 | |
9 | * (C) Copyright 2017 Adaptrum, Inc. | |
10 | * Written by Alexandru Gagniuc <alex.g@adaptrum.com> for Adaptrum, Inc. | |
11 | */ | |
12 | #include <config.h> | |
13 | #include <common.h> | |
14 | #include <dm.h> | |
15 | #include <errno.h> | |
16 | #include <fdtdec.h> | |
17 | #include <micrel.h> | |
18 | #include <phy.h> | |
19 | ||
20 | DECLARE_GLOBAL_DATA_PTR; | |
21 | ||
22 | /* | |
23 | * KSZ9021 - KSZ9031 common | |
24 | */ | |
25 | ||
26 | #define MII_KSZ90xx_PHY_CTL 0x1f | |
27 | #define MIIM_KSZ90xx_PHYCTL_1000 (1 << 6) | |
28 | #define MIIM_KSZ90xx_PHYCTL_100 (1 << 5) | |
29 | #define MIIM_KSZ90xx_PHYCTL_10 (1 << 4) | |
30 | #define MIIM_KSZ90xx_PHYCTL_DUPLEX (1 << 3) | |
31 | ||
32 | /* KSZ9021 PHY Registers */ | |
33 | #define MII_KSZ9021_EXTENDED_CTRL 0x0b | |
34 | #define MII_KSZ9021_EXTENDED_DATAW 0x0c | |
35 | #define MII_KSZ9021_EXTENDED_DATAR 0x0d | |
36 | ||
37 | #define CTRL1000_PREFER_MASTER (1 << 10) | |
38 | #define CTRL1000_CONFIG_MASTER (1 << 11) | |
39 | #define CTRL1000_MANUAL_CONFIG (1 << 12) | |
40 | ||
41 | /* KSZ9031 PHY Registers */ | |
42 | #define MII_KSZ9031_MMD_ACCES_CTRL 0x0d | |
43 | #define MII_KSZ9031_MMD_REG_DATA 0x0e | |
44 | ||
45 | static int ksz90xx_startup(struct phy_device *phydev) | |
46 | { | |
47 | unsigned phy_ctl; | |
48 | int ret; | |
49 | ||
50 | ret = genphy_update_link(phydev); | |
51 | if (ret) | |
52 | return ret; | |
53 | ||
54 | phy_ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_KSZ90xx_PHY_CTL); | |
55 | ||
56 | if (phy_ctl & MIIM_KSZ90xx_PHYCTL_DUPLEX) | |
57 | phydev->duplex = DUPLEX_FULL; | |
58 | else | |
59 | phydev->duplex = DUPLEX_HALF; | |
60 | ||
61 | if (phy_ctl & MIIM_KSZ90xx_PHYCTL_1000) | |
62 | phydev->speed = SPEED_1000; | |
63 | else if (phy_ctl & MIIM_KSZ90xx_PHYCTL_100) | |
64 | phydev->speed = SPEED_100; | |
65 | else if (phy_ctl & MIIM_KSZ90xx_PHYCTL_10) | |
66 | phydev->speed = SPEED_10; | |
67 | return 0; | |
68 | } | |
69 | ||
70 | /* Common OF config bits for KSZ9021 and KSZ9031 */ | |
71 | #ifdef CONFIG_DM_ETH | |
72 | struct ksz90x1_reg_field { | |
73 | const char *name; | |
74 | const u8 size; /* Size of the bitfield, in bits */ | |
75 | const u8 off; /* Offset from bit 0 */ | |
76 | const u8 dflt; /* Default value */ | |
77 | }; | |
78 | ||
79 | struct ksz90x1_ofcfg { | |
80 | const u16 reg; | |
81 | const u16 devad; | |
82 | const struct ksz90x1_reg_field *grp; | |
83 | const u16 grpsz; | |
84 | }; | |
85 | ||
86 | static const struct ksz90x1_reg_field ksz90x1_rxd_grp[] = { | |
87 | { "rxd0-skew-ps", 4, 0, 0x7 }, { "rxd1-skew-ps", 4, 4, 0x7 }, | |
88 | { "rxd2-skew-ps", 4, 8, 0x7 }, { "rxd3-skew-ps", 4, 12, 0x7 } | |
89 | }; | |
90 | ||
91 | static const struct ksz90x1_reg_field ksz90x1_txd_grp[] = { | |
92 | { "txd0-skew-ps", 4, 0, 0x7 }, { "txd1-skew-ps", 4, 4, 0x7 }, | |
93 | { "txd2-skew-ps", 4, 8, 0x7 }, { "txd3-skew-ps", 4, 12, 0x7 }, | |
94 | }; | |
95 | ||
96 | static const struct ksz90x1_reg_field ksz9021_clk_grp[] = { | |
97 | { "txen-skew-ps", 4, 0, 0x7 }, { "txc-skew-ps", 4, 4, 0x7 }, | |
98 | { "rxdv-skew-ps", 4, 8, 0x7 }, { "rxc-skew-ps", 4, 12, 0x7 }, | |
99 | }; | |
100 | ||
101 | static const struct ksz90x1_reg_field ksz9031_ctl_grp[] = { | |
102 | { "txen-skew-ps", 4, 0, 0x7 }, { "rxdv-skew-ps", 4, 4, 0x7 } | |
103 | }; | |
104 | ||
105 | static const struct ksz90x1_reg_field ksz9031_clk_grp[] = { | |
106 | { "rxc-skew-ps", 5, 0, 0xf }, { "txc-skew-ps", 5, 5, 0xf } | |
107 | }; | |
108 | ||
109 | static int ksz90x1_of_config_group(struct phy_device *phydev, | |
110 | struct ksz90x1_ofcfg *ofcfg) | |
111 | { | |
112 | struct udevice *dev = phydev->dev; | |
113 | struct phy_driver *drv = phydev->drv; | |
114 | const int ps_to_regval = 60; | |
115 | int val[4]; | |
116 | int i, changed = 0, offset, max; | |
117 | u16 regval = 0; | |
118 | ||
119 | if (!drv || !drv->writeext) | |
120 | return -EOPNOTSUPP; | |
121 | ||
122 | for (i = 0; i < ofcfg->grpsz; i++) { | |
123 | val[i] = fdtdec_get_uint(gd->fdt_blob, dev_of_offset(dev), | |
124 | ofcfg->grp[i].name, -1); | |
125 | offset = ofcfg->grp[i].off; | |
126 | if (val[i] == -1) { | |
127 | /* Default register value for KSZ9021 */ | |
128 | regval |= ofcfg->grp[i].dflt << offset; | |
129 | } else { | |
130 | changed = 1; /* Value was changed in OF */ | |
131 | /* Calculate the register value and fix corner cases */ | |
132 | if (val[i] > ps_to_regval * 0xf) { | |
133 | max = (1 << ofcfg->grp[i].size) - 1; | |
134 | regval |= max << offset; | |
135 | } else { | |
136 | regval |= (val[i] / ps_to_regval) << offset; | |
137 | } | |
138 | } | |
139 | } | |
140 | ||
141 | if (!changed) | |
142 | return 0; | |
143 | ||
144 | return drv->writeext(phydev, 0, ofcfg->devad, ofcfg->reg, regval); | |
145 | } | |
146 | ||
147 | static int ksz9021_of_config(struct phy_device *phydev) | |
148 | { | |
149 | struct ksz90x1_ofcfg ofcfg[] = { | |
150 | { MII_KSZ9021_EXT_RGMII_RX_DATA_SKEW, 0, ksz90x1_rxd_grp, 4 }, | |
151 | { MII_KSZ9021_EXT_RGMII_TX_DATA_SKEW, 0, ksz90x1_txd_grp, 4 }, | |
152 | { MII_KSZ9021_EXT_RGMII_CLOCK_SKEW, 0, ksz9021_clk_grp, 4 }, | |
153 | }; | |
154 | int i, ret = 0; | |
155 | ||
156 | for (i = 0; i < ARRAY_SIZE(ofcfg); i++) { | |
157 | ret = ksz90x1_of_config_group(phydev, &(ofcfg[i])); | |
158 | if (ret) | |
159 | return ret; | |
160 | } | |
161 | ||
162 | return 0; | |
163 | } | |
164 | ||
165 | static int ksz9031_of_config(struct phy_device *phydev) | |
166 | { | |
167 | struct ksz90x1_ofcfg ofcfg[] = { | |
168 | { MII_KSZ9031_EXT_RGMII_CTRL_SIG_SKEW, 2, ksz9031_ctl_grp, 2 }, | |
169 | { MII_KSZ9031_EXT_RGMII_RX_DATA_SKEW, 2, ksz90x1_rxd_grp, 4 }, | |
170 | { MII_KSZ9031_EXT_RGMII_TX_DATA_SKEW, 2, ksz90x1_txd_grp, 4 }, | |
171 | { MII_KSZ9031_EXT_RGMII_CLOCK_SKEW, 2, ksz9031_clk_grp, 2 }, | |
172 | }; | |
173 | int i, ret = 0; | |
174 | ||
175 | for (i = 0; i < ARRAY_SIZE(ofcfg); i++) { | |
176 | ret = ksz90x1_of_config_group(phydev, &(ofcfg[i])); | |
177 | if (ret) | |
178 | return ret; | |
179 | } | |
180 | ||
181 | return 0; | |
182 | } | |
183 | ||
184 | static int ksz9031_center_flp_timing(struct phy_device *phydev) | |
185 | { | |
186 | struct phy_driver *drv = phydev->drv; | |
187 | int ret = 0; | |
188 | ||
189 | if (!drv || !drv->writeext) | |
190 | return -EOPNOTSUPP; | |
191 | ||
192 | ret = drv->writeext(phydev, 0, 0, MII_KSZ9031_FLP_BURST_TX_LO, 0x1A80); | |
193 | if (ret) | |
194 | return ret; | |
195 | ||
196 | ret = drv->writeext(phydev, 0, 0, MII_KSZ9031_FLP_BURST_TX_HI, 0x6); | |
197 | return ret; | |
198 | } | |
199 | ||
200 | #else /* !CONFIG_DM_ETH */ | |
201 | static int ksz9021_of_config(struct phy_device *phydev) | |
202 | { | |
203 | return 0; | |
204 | } | |
205 | ||
206 | static int ksz9031_of_config(struct phy_device *phydev) | |
207 | { | |
208 | return 0; | |
209 | } | |
210 | ||
211 | static int ksz9031_center_flp_timing(struct phy_device *phydev) | |
212 | { | |
213 | return 0; | |
214 | } | |
215 | #endif | |
216 | ||
217 | /* | |
218 | * KSZ9021 | |
219 | */ | |
220 | int ksz9021_phy_extended_write(struct phy_device *phydev, int regnum, u16 val) | |
221 | { | |
222 | /* extended registers */ | |
223 | phy_write(phydev, MDIO_DEVAD_NONE, | |
224 | MII_KSZ9021_EXTENDED_CTRL, regnum | 0x8000); | |
225 | return phy_write(phydev, MDIO_DEVAD_NONE, | |
226 | MII_KSZ9021_EXTENDED_DATAW, val); | |
227 | } | |
228 | ||
229 | int ksz9021_phy_extended_read(struct phy_device *phydev, int regnum) | |
230 | { | |
231 | /* extended registers */ | |
232 | phy_write(phydev, MDIO_DEVAD_NONE, MII_KSZ9021_EXTENDED_CTRL, regnum); | |
233 | return phy_read(phydev, MDIO_DEVAD_NONE, MII_KSZ9021_EXTENDED_DATAR); | |
234 | } | |
235 | ||
236 | ||
237 | static int ksz9021_phy_extread(struct phy_device *phydev, int addr, int devaddr, | |
238 | int regnum) | |
239 | { | |
240 | return ksz9021_phy_extended_read(phydev, regnum); | |
241 | } | |
242 | ||
243 | static int ksz9021_phy_extwrite(struct phy_device *phydev, int addr, | |
244 | int devaddr, int regnum, u16 val) | |
245 | { | |
246 | return ksz9021_phy_extended_write(phydev, regnum, val); | |
247 | } | |
248 | ||
249 | static int ksz9021_config(struct phy_device *phydev) | |
250 | { | |
251 | unsigned ctrl1000 = 0; | |
252 | const unsigned master = CTRL1000_PREFER_MASTER | | |
253 | CTRL1000_CONFIG_MASTER | CTRL1000_MANUAL_CONFIG; | |
254 | unsigned features = phydev->drv->features; | |
255 | int ret; | |
256 | ||
257 | ret = ksz9021_of_config(phydev); | |
258 | if (ret) | |
259 | return ret; | |
260 | ||
261 | if (env_get("disable_giga")) | |
262 | features &= ~(SUPPORTED_1000baseT_Half | | |
263 | SUPPORTED_1000baseT_Full); | |
264 | /* force master mode for 1000BaseT due to chip errata */ | |
265 | if (features & SUPPORTED_1000baseT_Half) | |
266 | ctrl1000 |= ADVERTISE_1000HALF | master; | |
267 | if (features & SUPPORTED_1000baseT_Full) | |
268 | ctrl1000 |= ADVERTISE_1000FULL | master; | |
269 | phydev->advertising = features; | |
270 | phydev->supported = features; | |
271 | phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000, ctrl1000); | |
272 | genphy_config_aneg(phydev); | |
273 | genphy_restart_aneg(phydev); | |
274 | return 0; | |
275 | } | |
276 | ||
277 | static struct phy_driver ksz9021_driver = { | |
278 | .name = "Micrel ksz9021", | |
279 | .uid = 0x221610, | |
280 | .mask = 0xfffff0, | |
281 | .features = PHY_GBIT_FEATURES, | |
282 | .config = &ksz9021_config, | |
283 | .startup = &ksz90xx_startup, | |
284 | .shutdown = &genphy_shutdown, | |
285 | .writeext = &ksz9021_phy_extwrite, | |
286 | .readext = &ksz9021_phy_extread, | |
287 | }; | |
288 | ||
289 | /* | |
290 | * KSZ9031 | |
291 | */ | |
292 | int ksz9031_phy_extended_write(struct phy_device *phydev, | |
293 | int devaddr, int regnum, u16 mode, u16 val) | |
294 | { | |
295 | /*select register addr for mmd*/ | |
296 | phy_write(phydev, MDIO_DEVAD_NONE, | |
297 | MII_KSZ9031_MMD_ACCES_CTRL, devaddr); | |
298 | /*select register for mmd*/ | |
299 | phy_write(phydev, MDIO_DEVAD_NONE, | |
300 | MII_KSZ9031_MMD_REG_DATA, regnum); | |
301 | /*setup mode*/ | |
302 | phy_write(phydev, MDIO_DEVAD_NONE, | |
303 | MII_KSZ9031_MMD_ACCES_CTRL, (mode | devaddr)); | |
304 | /*write the value*/ | |
305 | return phy_write(phydev, MDIO_DEVAD_NONE, | |
306 | MII_KSZ9031_MMD_REG_DATA, val); | |
307 | } | |
308 | ||
309 | int ksz9031_phy_extended_read(struct phy_device *phydev, int devaddr, | |
310 | int regnum, u16 mode) | |
311 | { | |
312 | phy_write(phydev, MDIO_DEVAD_NONE, | |
313 | MII_KSZ9031_MMD_ACCES_CTRL, devaddr); | |
314 | phy_write(phydev, MDIO_DEVAD_NONE, | |
315 | MII_KSZ9031_MMD_REG_DATA, regnum); | |
316 | phy_write(phydev, MDIO_DEVAD_NONE, | |
317 | MII_KSZ9031_MMD_ACCES_CTRL, (devaddr | mode)); | |
318 | return phy_read(phydev, MDIO_DEVAD_NONE, MII_KSZ9031_MMD_REG_DATA); | |
319 | } | |
320 | ||
321 | static int ksz9031_phy_extread(struct phy_device *phydev, int addr, int devaddr, | |
322 | int regnum) | |
323 | { | |
324 | return ksz9031_phy_extended_read(phydev, devaddr, regnum, | |
325 | MII_KSZ9031_MOD_DATA_NO_POST_INC); | |
326 | } | |
327 | ||
328 | static int ksz9031_phy_extwrite(struct phy_device *phydev, int addr, | |
329 | int devaddr, int regnum, u16 val) | |
330 | { | |
331 | return ksz9031_phy_extended_write(phydev, devaddr, regnum, | |
332 | MII_KSZ9031_MOD_DATA_POST_INC_RW, val); | |
333 | } | |
334 | ||
335 | static int ksz9031_config(struct phy_device *phydev) | |
336 | { | |
337 | int ret; | |
338 | ||
339 | ret = ksz9031_of_config(phydev); | |
340 | if (ret) | |
341 | return ret; | |
342 | ret = ksz9031_center_flp_timing(phydev); | |
343 | if (ret) | |
344 | return ret; | |
345 | ||
346 | /* add an option to disable the gigabit feature of this PHY */ | |
347 | if (env_get("disable_giga")) { | |
348 | unsigned features; | |
349 | unsigned bmcr; | |
350 | ||
351 | /* disable speed 1000 in features supported by the PHY */ | |
352 | features = phydev->drv->features; | |
353 | features &= ~(SUPPORTED_1000baseT_Half | | |
354 | SUPPORTED_1000baseT_Full); | |
355 | phydev->advertising = phydev->supported = features; | |
356 | ||
357 | /* disable speed 1000 in Basic Control Register */ | |
358 | bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR); | |
359 | bmcr &= ~(1 << 6); | |
360 | phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, bmcr); | |
361 | ||
362 | /* disable speed 1000 in 1000Base-T Control Register */ | |
363 | phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000, 0); | |
364 | ||
365 | /* start autoneg */ | |
366 | genphy_config_aneg(phydev); | |
367 | genphy_restart_aneg(phydev); | |
368 | ||
369 | return 0; | |
370 | } | |
371 | ||
372 | return genphy_config(phydev); | |
373 | } | |
374 | ||
375 | static struct phy_driver ksz9031_driver = { | |
376 | .name = "Micrel ksz9031", | |
377 | .uid = 0x221620, | |
378 | .mask = 0xfffff0, | |
379 | .features = PHY_GBIT_FEATURES, | |
380 | .config = &ksz9031_config, | |
381 | .startup = &ksz90xx_startup, | |
382 | .shutdown = &genphy_shutdown, | |
383 | .writeext = &ksz9031_phy_extwrite, | |
384 | .readext = &ksz9031_phy_extread, | |
385 | }; | |
386 | ||
387 | int phy_micrel_ksz90x1_init(void) | |
388 | { | |
389 | phy_register(&ksz9021_driver); | |
390 | phy_register(&ksz9031_driver); | |
391 | return 0; | |
392 | } |