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Commit | Line | Data |
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a2443fd1 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
9860118b RK |
2 | /* |
3 | * Core PHY library, taken from phy.c | |
9860118b RK |
4 | */ |
5 | #include <linux/export.h> | |
6 | #include <linux/phy.h> | |
a4eaed9f | 7 | #include <linux/of.h> |
9860118b | 8 | |
da4625ac RK |
9 | const char *phy_speed_to_str(int speed) |
10 | { | |
14af7fd1 | 11 | BUILD_BUG_ON_MSG(__ETHTOOL_LINK_MODE_MASK_NBITS != 74, |
c6576bfe HK |
12 | "Enum ethtool_link_mode_bit_indices and phylib are out of sync. " |
13 | "If a speed or mode has been added please update phy_speed_to_str " | |
14 | "and the PHY settings array.\n"); | |
15 | ||
da4625ac RK |
16 | switch (speed) { |
17 | case SPEED_10: | |
18 | return "10Mbps"; | |
19 | case SPEED_100: | |
20 | return "100Mbps"; | |
21 | case SPEED_1000: | |
22 | return "1Gbps"; | |
23 | case SPEED_2500: | |
24 | return "2.5Gbps"; | |
25 | case SPEED_5000: | |
26 | return "5Gbps"; | |
27 | case SPEED_10000: | |
28 | return "10Gbps"; | |
29 | case SPEED_14000: | |
30 | return "14Gbps"; | |
31 | case SPEED_20000: | |
32 | return "20Gbps"; | |
33 | case SPEED_25000: | |
34 | return "25Gbps"; | |
35 | case SPEED_40000: | |
36 | return "40Gbps"; | |
37 | case SPEED_50000: | |
38 | return "50Gbps"; | |
39 | case SPEED_56000: | |
40 | return "56Gbps"; | |
41 | case SPEED_100000: | |
42 | return "100Gbps"; | |
5a3144e4 HK |
43 | case SPEED_200000: |
44 | return "200Gbps"; | |
14af7fd1 JP |
45 | case SPEED_400000: |
46 | return "400Gbps"; | |
da4625ac RK |
47 | case SPEED_UNKNOWN: |
48 | return "Unknown"; | |
49 | default: | |
50 | return "Unsupported (update phy-core.c)"; | |
51 | } | |
52 | } | |
53 | EXPORT_SYMBOL_GPL(phy_speed_to_str); | |
54 | ||
55 | const char *phy_duplex_to_str(unsigned int duplex) | |
56 | { | |
57 | if (duplex == DUPLEX_HALF) | |
58 | return "Half"; | |
59 | if (duplex == DUPLEX_FULL) | |
60 | return "Full"; | |
61 | if (duplex == DUPLEX_UNKNOWN) | |
62 | return "Unknown"; | |
63 | return "Unsupported (update phy-core.c)"; | |
64 | } | |
65 | EXPORT_SYMBOL_GPL(phy_duplex_to_str); | |
66 | ||
0ccb4fc6 RK |
67 | /* A mapping of all SUPPORTED settings to speed/duplex. This table |
68 | * must be grouped by speed and sorted in descending match priority | |
69 | * - iow, descending speed. */ | |
f1538eca HK |
70 | |
71 | #define PHY_SETTING(s, d, b) { .speed = SPEED_ ## s, .duplex = DUPLEX_ ## d, \ | |
72 | .bit = ETHTOOL_LINK_MODE_ ## b ## _BIT} | |
73 | ||
0ccb4fc6 | 74 | static const struct phy_setting settings[] = { |
14af7fd1 JP |
75 | /* 400G */ |
76 | PHY_SETTING( 400000, FULL, 400000baseCR8_Full ), | |
77 | PHY_SETTING( 400000, FULL, 400000baseKR8_Full ), | |
78 | PHY_SETTING( 400000, FULL, 400000baseLR8_ER8_FR8_Full ), | |
79 | PHY_SETTING( 400000, FULL, 400000baseDR8_Full ), | |
80 | PHY_SETTING( 400000, FULL, 400000baseSR8_Full ), | |
5a3144e4 HK |
81 | /* 200G */ |
82 | PHY_SETTING( 200000, FULL, 200000baseCR4_Full ), | |
83 | PHY_SETTING( 200000, FULL, 200000baseKR4_Full ), | |
84 | PHY_SETTING( 200000, FULL, 200000baseLR4_ER4_FR4_Full ), | |
85 | PHY_SETTING( 200000, FULL, 200000baseDR4_Full ), | |
86 | PHY_SETTING( 200000, FULL, 200000baseSR4_Full ), | |
3c6b59d6 | 87 | /* 100G */ |
f1538eca HK |
88 | PHY_SETTING( 100000, FULL, 100000baseCR4_Full ), |
89 | PHY_SETTING( 100000, FULL, 100000baseKR4_Full ), | |
90 | PHY_SETTING( 100000, FULL, 100000baseLR4_ER4_Full ), | |
91 | PHY_SETTING( 100000, FULL, 100000baseSR4_Full ), | |
5a3144e4 HK |
92 | PHY_SETTING( 100000, FULL, 100000baseCR2_Full ), |
93 | PHY_SETTING( 100000, FULL, 100000baseKR2_Full ), | |
94 | PHY_SETTING( 100000, FULL, 100000baseLR2_ER2_FR2_Full ), | |
95 | PHY_SETTING( 100000, FULL, 100000baseDR2_Full ), | |
96 | PHY_SETTING( 100000, FULL, 100000baseSR2_Full ), | |
3c6b59d6 | 97 | /* 56G */ |
f1538eca HK |
98 | PHY_SETTING( 56000, FULL, 56000baseCR4_Full ), |
99 | PHY_SETTING( 56000, FULL, 56000baseKR4_Full ), | |
100 | PHY_SETTING( 56000, FULL, 56000baseLR4_Full ), | |
101 | PHY_SETTING( 56000, FULL, 56000baseSR4_Full ), | |
3c6b59d6 | 102 | /* 50G */ |
f1538eca HK |
103 | PHY_SETTING( 50000, FULL, 50000baseCR2_Full ), |
104 | PHY_SETTING( 50000, FULL, 50000baseKR2_Full ), | |
105 | PHY_SETTING( 50000, FULL, 50000baseSR2_Full ), | |
5a3144e4 HK |
106 | PHY_SETTING( 50000, FULL, 50000baseCR_Full ), |
107 | PHY_SETTING( 50000, FULL, 50000baseKR_Full ), | |
108 | PHY_SETTING( 50000, FULL, 50000baseLR_ER_FR_Full ), | |
109 | PHY_SETTING( 50000, FULL, 50000baseDR_Full ), | |
110 | PHY_SETTING( 50000, FULL, 50000baseSR_Full ), | |
3c6b59d6 | 111 | /* 40G */ |
f1538eca HK |
112 | PHY_SETTING( 40000, FULL, 40000baseCR4_Full ), |
113 | PHY_SETTING( 40000, FULL, 40000baseKR4_Full ), | |
114 | PHY_SETTING( 40000, FULL, 40000baseLR4_Full ), | |
115 | PHY_SETTING( 40000, FULL, 40000baseSR4_Full ), | |
3c6b59d6 | 116 | /* 25G */ |
f1538eca HK |
117 | PHY_SETTING( 25000, FULL, 25000baseCR_Full ), |
118 | PHY_SETTING( 25000, FULL, 25000baseKR_Full ), | |
119 | PHY_SETTING( 25000, FULL, 25000baseSR_Full ), | |
3c6b59d6 | 120 | /* 20G */ |
f1538eca HK |
121 | PHY_SETTING( 20000, FULL, 20000baseKR2_Full ), |
122 | PHY_SETTING( 20000, FULL, 20000baseMLD2_Full ), | |
3c6b59d6 | 123 | /* 10G */ |
f1538eca HK |
124 | PHY_SETTING( 10000, FULL, 10000baseCR_Full ), |
125 | PHY_SETTING( 10000, FULL, 10000baseER_Full ), | |
126 | PHY_SETTING( 10000, FULL, 10000baseKR_Full ), | |
127 | PHY_SETTING( 10000, FULL, 10000baseKX4_Full ), | |
128 | PHY_SETTING( 10000, FULL, 10000baseLR_Full ), | |
129 | PHY_SETTING( 10000, FULL, 10000baseLRM_Full ), | |
130 | PHY_SETTING( 10000, FULL, 10000baseR_FEC ), | |
131 | PHY_SETTING( 10000, FULL, 10000baseSR_Full ), | |
132 | PHY_SETTING( 10000, FULL, 10000baseT_Full ), | |
3c6b59d6 | 133 | /* 5G */ |
f1538eca | 134 | PHY_SETTING( 5000, FULL, 5000baseT_Full ), |
3c6b59d6 | 135 | /* 2.5G */ |
f1538eca HK |
136 | PHY_SETTING( 2500, FULL, 2500baseT_Full ), |
137 | PHY_SETTING( 2500, FULL, 2500baseX_Full ), | |
3c6b59d6 | 138 | /* 1G */ |
f1538eca HK |
139 | PHY_SETTING( 1000, FULL, 1000baseKX_Full ), |
140 | PHY_SETTING( 1000, FULL, 1000baseT_Full ), | |
141 | PHY_SETTING( 1000, HALF, 1000baseT_Half ), | |
b2557764 | 142 | PHY_SETTING( 1000, FULL, 1000baseT1_Full ), |
f1538eca | 143 | PHY_SETTING( 1000, FULL, 1000baseX_Full ), |
3c6b59d6 | 144 | /* 100M */ |
f1538eca | 145 | PHY_SETTING( 100, FULL, 100baseT_Full ), |
b2557764 | 146 | PHY_SETTING( 100, FULL, 100baseT1_Full ), |
f1538eca | 147 | PHY_SETTING( 100, HALF, 100baseT_Half ), |
3c6b59d6 | 148 | /* 10M */ |
f1538eca HK |
149 | PHY_SETTING( 10, FULL, 10baseT_Full ), |
150 | PHY_SETTING( 10, HALF, 10baseT_Half ), | |
0ccb4fc6 | 151 | }; |
f1538eca | 152 | #undef PHY_SETTING |
0ccb4fc6 RK |
153 | |
154 | /** | |
155 | * phy_lookup_setting - lookup a PHY setting | |
156 | * @speed: speed to match | |
157 | * @duplex: duplex to match | |
158 | * @mask: allowed link modes | |
0ccb4fc6 RK |
159 | * @exact: an exact match is required |
160 | * | |
161 | * Search the settings array for a setting that matches the speed and | |
162 | * duplex, and which is supported. | |
163 | * | |
164 | * If @exact is unset, either an exact match or %NULL for no match will | |
165 | * be returned. | |
166 | * | |
167 | * If @exact is set, an exact match, the fastest supported setting at | |
168 | * or below the specified speed, the slowest supported setting, or if | |
169 | * they all fail, %NULL will be returned. | |
170 | */ | |
171 | const struct phy_setting * | |
3c1bcc86 | 172 | phy_lookup_setting(int speed, int duplex, const unsigned long *mask, bool exact) |
0ccb4fc6 RK |
173 | { |
174 | const struct phy_setting *p, *match = NULL, *last = NULL; | |
175 | int i; | |
176 | ||
177 | for (i = 0, p = settings; i < ARRAY_SIZE(settings); i++, p++) { | |
3c1bcc86 AL |
178 | if (p->bit < __ETHTOOL_LINK_MODE_MASK_NBITS && |
179 | test_bit(p->bit, mask)) { | |
0ccb4fc6 RK |
180 | last = p; |
181 | if (p->speed == speed && p->duplex == duplex) { | |
182 | /* Exact match for speed and duplex */ | |
183 | match = p; | |
184 | break; | |
185 | } else if (!exact) { | |
186 | if (!match && p->speed <= speed) | |
187 | /* Candidate */ | |
188 | match = p; | |
189 | ||
190 | if (p->speed < speed) | |
191 | break; | |
192 | } | |
193 | } | |
194 | } | |
195 | ||
196 | if (!match && !exact) | |
197 | match = last; | |
198 | ||
199 | return match; | |
200 | } | |
201 | EXPORT_SYMBOL_GPL(phy_lookup_setting); | |
202 | ||
203 | size_t phy_speeds(unsigned int *speeds, size_t size, | |
3c1bcc86 | 204 | unsigned long *mask) |
0ccb4fc6 RK |
205 | { |
206 | size_t count; | |
207 | int i; | |
208 | ||
209 | for (i = 0, count = 0; i < ARRAY_SIZE(settings) && count < size; i++) | |
3c1bcc86 | 210 | if (settings[i].bit < __ETHTOOL_LINK_MODE_MASK_NBITS && |
0ccb4fc6 RK |
211 | test_bit(settings[i].bit, mask) && |
212 | (count == 0 || speeds[count - 1] != settings[i].speed)) | |
213 | speeds[count++] = settings[i].speed; | |
214 | ||
215 | return count; | |
216 | } | |
217 | ||
7b261e0e | 218 | static int __set_linkmode_max_speed(u32 max_speed, unsigned long *addr) |
a4eaed9f MC |
219 | { |
220 | const struct phy_setting *p; | |
221 | int i; | |
222 | ||
223 | for (i = 0, p = settings; i < ARRAY_SIZE(settings); i++, p++) { | |
224 | if (p->speed > max_speed) | |
7b261e0e | 225 | linkmode_clear_bit(p->bit, addr); |
a4eaed9f MC |
226 | else |
227 | break; | |
228 | } | |
229 | ||
230 | return 0; | |
231 | } | |
232 | ||
7b261e0e HK |
233 | static int __set_phy_supported(struct phy_device *phydev, u32 max_speed) |
234 | { | |
235 | return __set_linkmode_max_speed(max_speed, phydev->supported); | |
236 | } | |
237 | ||
a4eaed9f MC |
238 | int phy_set_max_speed(struct phy_device *phydev, u32 max_speed) |
239 | { | |
240 | int err; | |
241 | ||
242 | err = __set_phy_supported(phydev, max_speed); | |
243 | if (err) | |
244 | return err; | |
245 | ||
22c0ef6b | 246 | phy_advertise_supported(phydev); |
a4eaed9f MC |
247 | |
248 | return 0; | |
249 | } | |
250 | EXPORT_SYMBOL(phy_set_max_speed); | |
251 | ||
252 | void of_set_phy_supported(struct phy_device *phydev) | |
253 | { | |
254 | struct device_node *node = phydev->mdio.dev.of_node; | |
255 | u32 max_speed; | |
256 | ||
257 | if (!IS_ENABLED(CONFIG_OF_MDIO)) | |
258 | return; | |
259 | ||
260 | if (!node) | |
261 | return; | |
262 | ||
263 | if (!of_property_read_u32(node, "max-speed", &max_speed)) | |
264 | __set_phy_supported(phydev, max_speed); | |
265 | } | |
266 | ||
3feb9b23 MC |
267 | void of_set_phy_eee_broken(struct phy_device *phydev) |
268 | { | |
269 | struct device_node *node = phydev->mdio.dev.of_node; | |
270 | u32 broken = 0; | |
271 | ||
272 | if (!IS_ENABLED(CONFIG_OF_MDIO)) | |
273 | return; | |
274 | ||
275 | if (!node) | |
276 | return; | |
277 | ||
278 | if (of_property_read_bool(node, "eee-broken-100tx")) | |
279 | broken |= MDIO_EEE_100TX; | |
280 | if (of_property_read_bool(node, "eee-broken-1000t")) | |
281 | broken |= MDIO_EEE_1000T; | |
282 | if (of_property_read_bool(node, "eee-broken-10gt")) | |
283 | broken |= MDIO_EEE_10GT; | |
284 | if (of_property_read_bool(node, "eee-broken-1000kx")) | |
285 | broken |= MDIO_EEE_1000KX; | |
286 | if (of_property_read_bool(node, "eee-broken-10gkx4")) | |
287 | broken |= MDIO_EEE_10GKX4; | |
288 | if (of_property_read_bool(node, "eee-broken-10gkr")) | |
289 | broken |= MDIO_EEE_10GKR; | |
290 | ||
291 | phydev->eee_broken_modes = broken; | |
292 | } | |
293 | ||
2d880b87 RK |
294 | void phy_resolve_aneg_pause(struct phy_device *phydev) |
295 | { | |
296 | if (phydev->duplex == DUPLEX_FULL) { | |
297 | phydev->pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, | |
298 | phydev->lp_advertising); | |
299 | phydev->asym_pause = linkmode_test_bit( | |
300 | ETHTOOL_LINK_MODE_Asym_Pause_BIT, | |
301 | phydev->lp_advertising); | |
302 | } | |
303 | } | |
304 | EXPORT_SYMBOL_GPL(phy_resolve_aneg_pause); | |
305 | ||
8c5e850c | 306 | /** |
cc1122b0 | 307 | * phy_resolve_aneg_linkmode - resolve the advertisements into phy settings |
8c5e850c RK |
308 | * @phydev: The phy_device struct |
309 | * | |
cc1122b0 | 310 | * Resolve our and the link partner advertisements into their corresponding |
8c5e850c RK |
311 | * speed and duplex. If full duplex was negotiated, extract the pause mode |
312 | * from the link partner mask. | |
313 | */ | |
314 | void phy_resolve_aneg_linkmode(struct phy_device *phydev) | |
315 | { | |
3c1bcc86 | 316 | __ETHTOOL_DECLARE_LINK_MODE_MASK(common); |
a2703de7 | 317 | int i; |
8c5e850c | 318 | |
c0ec3c27 | 319 | linkmode_and(common, phydev->lp_advertising, phydev->advertising); |
3c1bcc86 | 320 | |
a2703de7 HK |
321 | for (i = 0; i < ARRAY_SIZE(settings); i++) |
322 | if (test_bit(settings[i].bit, common)) { | |
323 | phydev->speed = settings[i].speed; | |
324 | phydev->duplex = settings[i].duplex; | |
325 | break; | |
326 | } | |
8c5e850c | 327 | |
2d880b87 | 328 | phy_resolve_aneg_pause(phydev); |
8c5e850c RK |
329 | } |
330 | EXPORT_SYMBOL_GPL(phy_resolve_aneg_linkmode); | |
331 | ||
331c56ac HK |
332 | static int phy_resolve_min_speed(struct phy_device *phydev, bool fdx_only) |
333 | { | |
334 | __ETHTOOL_DECLARE_LINK_MODE_MASK(common); | |
335 | int i = ARRAY_SIZE(settings); | |
336 | ||
337 | linkmode_and(common, phydev->lp_advertising, phydev->advertising); | |
338 | ||
339 | while (--i >= 0) { | |
340 | if (test_bit(settings[i].bit, common)) { | |
341 | if (fdx_only && settings[i].duplex != DUPLEX_FULL) | |
342 | continue; | |
343 | return settings[i].speed; | |
344 | } | |
345 | } | |
346 | ||
347 | return SPEED_UNKNOWN; | |
348 | } | |
349 | ||
350 | int phy_speed_down_core(struct phy_device *phydev) | |
351 | { | |
352 | int min_common_speed = phy_resolve_min_speed(phydev, true); | |
353 | ||
354 | if (min_common_speed == SPEED_UNKNOWN) | |
355 | return -EINVAL; | |
356 | ||
357 | return __set_linkmode_max_speed(min_common_speed, phydev->advertising); | |
358 | } | |
359 | ||
060fbc89 RK |
360 | static void mmd_phy_indirect(struct mii_bus *bus, int phy_addr, int devad, |
361 | u16 regnum) | |
9860118b RK |
362 | { |
363 | /* Write the desired MMD Devad */ | |
1b2dea2e | 364 | __mdiobus_write(bus, phy_addr, MII_MMD_CTRL, devad); |
9860118b RK |
365 | |
366 | /* Write the desired MMD register address */ | |
1b2dea2e | 367 | __mdiobus_write(bus, phy_addr, MII_MMD_DATA, regnum); |
9860118b RK |
368 | |
369 | /* Select the Function : DATA with no post increment */ | |
1b2dea2e RK |
370 | __mdiobus_write(bus, phy_addr, MII_MMD_CTRL, |
371 | devad | MII_MMD_CTRL_NOINCR); | |
9860118b RK |
372 | } |
373 | ||
9860118b | 374 | /** |
1878f0dc | 375 | * __phy_read_mmd - Convenience function for reading a register |
9860118b RK |
376 | * from an MMD on a given PHY. |
377 | * @phydev: The phy_device struct | |
3b85d8df RK |
378 | * @devad: The MMD to read from (0..31) |
379 | * @regnum: The register on the MMD to read (0..65535) | |
9860118b | 380 | * |
1878f0dc | 381 | * Same rules as for __phy_read(); |
9860118b | 382 | */ |
1878f0dc | 383 | int __phy_read_mmd(struct phy_device *phydev, int devad, u32 regnum) |
9860118b | 384 | { |
3b85d8df RK |
385 | int val; |
386 | ||
1ee6b9bc RK |
387 | if (regnum > (u16)~0 || devad > 32) |
388 | return -EINVAL; | |
9860118b | 389 | |
3b85d8df RK |
390 | if (phydev->drv->read_mmd) { |
391 | val = phydev->drv->read_mmd(phydev, devad, regnum); | |
392 | } else if (phydev->is_c45) { | |
1ee6b9bc | 393 | u32 addr = MII_ADDR_C45 | (devad << 16) | (regnum & 0xffff); |
1ee6b9bc | 394 | |
1878f0dc | 395 | val = __mdiobus_read(phydev->mdio.bus, phydev->mdio.addr, addr); |
3b85d8df | 396 | } else { |
9860118b | 397 | struct mii_bus *bus = phydev->mdio.bus; |
3b85d8df | 398 | int phy_addr = phydev->mdio.addr; |
9860118b | 399 | |
060fbc89 | 400 | mmd_phy_indirect(bus, phy_addr, devad, regnum); |
9860118b | 401 | |
3b85d8df | 402 | /* Read the content of the MMD's selected register */ |
1b2dea2e | 403 | val = __mdiobus_read(bus, phy_addr, MII_MMD_DATA); |
9860118b | 404 | } |
3b85d8df | 405 | return val; |
9860118b | 406 | } |
1878f0dc NY |
407 | EXPORT_SYMBOL(__phy_read_mmd); |
408 | ||
409 | /** | |
410 | * phy_read_mmd - Convenience function for reading a register | |
411 | * from an MMD on a given PHY. | |
412 | * @phydev: The phy_device struct | |
413 | * @devad: The MMD to read from | |
414 | * @regnum: The register on the MMD to read | |
415 | * | |
416 | * Same rules as for phy_read(); | |
417 | */ | |
418 | int phy_read_mmd(struct phy_device *phydev, int devad, u32 regnum) | |
419 | { | |
420 | int ret; | |
421 | ||
bec170e5 | 422 | phy_lock_mdio_bus(phydev); |
1878f0dc | 423 | ret = __phy_read_mmd(phydev, devad, regnum); |
bec170e5 | 424 | phy_unlock_mdio_bus(phydev); |
1878f0dc NY |
425 | |
426 | return ret; | |
427 | } | |
3b85d8df | 428 | EXPORT_SYMBOL(phy_read_mmd); |
9860118b RK |
429 | |
430 | /** | |
1878f0dc | 431 | * __phy_write_mmd - Convenience function for writing a register |
9860118b RK |
432 | * on an MMD on a given PHY. |
433 | * @phydev: The phy_device struct | |
434 | * @devad: The MMD to read from | |
435 | * @regnum: The register on the MMD to read | |
436 | * @val: value to write to @regnum | |
437 | * | |
1878f0dc | 438 | * Same rules as for __phy_write(); |
9860118b | 439 | */ |
1878f0dc | 440 | int __phy_write_mmd(struct phy_device *phydev, int devad, u32 regnum, u16 val) |
9860118b | 441 | { |
3b85d8df RK |
442 | int ret; |
443 | ||
1ee6b9bc RK |
444 | if (regnum > (u16)~0 || devad > 32) |
445 | return -EINVAL; | |
446 | ||
1dbba4cb | 447 | if (phydev->drv->write_mmd) { |
3b85d8df RK |
448 | ret = phydev->drv->write_mmd(phydev, devad, regnum, val); |
449 | } else if (phydev->is_c45) { | |
1ee6b9bc RK |
450 | u32 addr = MII_ADDR_C45 | (devad << 16) | (regnum & 0xffff); |
451 | ||
1878f0dc NY |
452 | ret = __mdiobus_write(phydev->mdio.bus, phydev->mdio.addr, |
453 | addr, val); | |
3b85d8df RK |
454 | } else { |
455 | struct mii_bus *bus = phydev->mdio.bus; | |
456 | int phy_addr = phydev->mdio.addr; | |
9860118b | 457 | |
060fbc89 | 458 | mmd_phy_indirect(bus, phy_addr, devad, regnum); |
9860118b | 459 | |
3b85d8df | 460 | /* Write the data into MMD's selected register */ |
1b2dea2e | 461 | __mdiobus_write(bus, phy_addr, MII_MMD_DATA, val); |
3b85d8df RK |
462 | |
463 | ret = 0; | |
464 | } | |
465 | return ret; | |
9860118b | 466 | } |
1878f0dc NY |
467 | EXPORT_SYMBOL(__phy_write_mmd); |
468 | ||
469 | /** | |
470 | * phy_write_mmd - Convenience function for writing a register | |
471 | * on an MMD on a given PHY. | |
472 | * @phydev: The phy_device struct | |
473 | * @devad: The MMD to read from | |
474 | * @regnum: The register on the MMD to read | |
475 | * @val: value to write to @regnum | |
476 | * | |
477 | * Same rules as for phy_write(); | |
478 | */ | |
479 | int phy_write_mmd(struct phy_device *phydev, int devad, u32 regnum, u16 val) | |
480 | { | |
481 | int ret; | |
482 | ||
bec170e5 | 483 | phy_lock_mdio_bus(phydev); |
1878f0dc | 484 | ret = __phy_write_mmd(phydev, devad, regnum, val); |
bec170e5 | 485 | phy_unlock_mdio_bus(phydev); |
1878f0dc NY |
486 | |
487 | return ret; | |
488 | } | |
9860118b | 489 | EXPORT_SYMBOL(phy_write_mmd); |
788f9933 RK |
490 | |
491 | /** | |
b8554d4f | 492 | * __phy_modify_changed() - Convenience function for modifying a PHY register |
788f9933 RK |
493 | * @phydev: a pointer to a &struct phy_device |
494 | * @regnum: register number | |
495 | * @mask: bit mask of bits to clear | |
496 | * @set: bit mask of bits to set | |
497 | * | |
498 | * Unlocked helper function which allows a PHY register to be modified as | |
f102852f | 499 | * new register value = (old register value & ~mask) | set |
b8554d4f HK |
500 | * |
501 | * Returns negative errno, 0 if there was no change, and 1 in case of change | |
788f9933 | 502 | */ |
b8554d4f HK |
503 | int __phy_modify_changed(struct phy_device *phydev, u32 regnum, u16 mask, |
504 | u16 set) | |
788f9933 | 505 | { |
b8554d4f | 506 | int new, ret; |
788f9933 RK |
507 | |
508 | ret = __phy_read(phydev, regnum); | |
9f239fe6 AL |
509 | if (ret < 0) |
510 | return ret; | |
788f9933 | 511 | |
b8554d4f HK |
512 | new = (ret & ~mask) | set; |
513 | if (new == ret) | |
514 | return 0; | |
515 | ||
516 | ret = __phy_write(phydev, regnum, new); | |
517 | ||
518 | return ret < 0 ? ret : 1; | |
519 | } | |
520 | EXPORT_SYMBOL_GPL(__phy_modify_changed); | |
521 | ||
522 | /** | |
523 | * phy_modify_changed - Function for modifying a PHY register | |
524 | * @phydev: the phy_device struct | |
525 | * @regnum: register number to modify | |
526 | * @mask: bit mask of bits to clear | |
527 | * @set: new value of bits set in mask to write to @regnum | |
528 | * | |
529 | * NOTE: MUST NOT be called from interrupt context, | |
530 | * because the bus read/write functions may wait for an interrupt | |
531 | * to conclude the operation. | |
532 | * | |
533 | * Returns negative errno, 0 if there was no change, and 1 in case of change | |
534 | */ | |
535 | int phy_modify_changed(struct phy_device *phydev, u32 regnum, u16 mask, u16 set) | |
536 | { | |
537 | int ret; | |
538 | ||
bec170e5 | 539 | phy_lock_mdio_bus(phydev); |
b8554d4f | 540 | ret = __phy_modify_changed(phydev, regnum, mask, set); |
bec170e5 | 541 | phy_unlock_mdio_bus(phydev); |
b8554d4f HK |
542 | |
543 | return ret; | |
544 | } | |
545 | EXPORT_SYMBOL_GPL(phy_modify_changed); | |
546 | ||
547 | /** | |
548 | * __phy_modify - Convenience function for modifying a PHY register | |
549 | * @phydev: the phy_device struct | |
550 | * @regnum: register number to modify | |
551 | * @mask: bit mask of bits to clear | |
552 | * @set: new value of bits set in mask to write to @regnum | |
553 | * | |
554 | * NOTE: MUST NOT be called from interrupt context, | |
555 | * because the bus read/write functions may wait for an interrupt | |
556 | * to conclude the operation. | |
557 | */ | |
558 | int __phy_modify(struct phy_device *phydev, u32 regnum, u16 mask, u16 set) | |
559 | { | |
560 | int ret; | |
561 | ||
562 | ret = __phy_modify_changed(phydev, regnum, mask, set); | |
9f239fe6 AL |
563 | |
564 | return ret < 0 ? ret : 0; | |
788f9933 RK |
565 | } |
566 | EXPORT_SYMBOL_GPL(__phy_modify); | |
78ffc4ac | 567 | |
2b74e5be RK |
568 | /** |
569 | * phy_modify - Convenience function for modifying a given PHY register | |
570 | * @phydev: the phy_device struct | |
571 | * @regnum: register number to write | |
572 | * @mask: bit mask of bits to clear | |
573 | * @set: new value of bits set in mask to write to @regnum | |
574 | * | |
575 | * NOTE: MUST NOT be called from interrupt context, | |
576 | * because the bus read/write functions may wait for an interrupt | |
577 | * to conclude the operation. | |
578 | */ | |
579 | int phy_modify(struct phy_device *phydev, u32 regnum, u16 mask, u16 set) | |
580 | { | |
581 | int ret; | |
582 | ||
bec170e5 | 583 | phy_lock_mdio_bus(phydev); |
2b74e5be | 584 | ret = __phy_modify(phydev, regnum, mask, set); |
bec170e5 | 585 | phy_unlock_mdio_bus(phydev); |
2b74e5be RK |
586 | |
587 | return ret; | |
588 | } | |
589 | EXPORT_SYMBOL_GPL(phy_modify); | |
590 | ||
1878f0dc | 591 | /** |
b8554d4f | 592 | * __phy_modify_mmd_changed - Function for modifying a register on MMD |
1878f0dc NY |
593 | * @phydev: the phy_device struct |
594 | * @devad: the MMD containing register to modify | |
595 | * @regnum: register number to modify | |
596 | * @mask: bit mask of bits to clear | |
597 | * @set: new value of bits set in mask to write to @regnum | |
598 | * | |
599 | * Unlocked helper function which allows a MMD register to be modified as | |
600 | * new register value = (old register value & ~mask) | set | |
b8554d4f HK |
601 | * |
602 | * Returns negative errno, 0 if there was no change, and 1 in case of change | |
1878f0dc | 603 | */ |
b8554d4f HK |
604 | int __phy_modify_mmd_changed(struct phy_device *phydev, int devad, u32 regnum, |
605 | u16 mask, u16 set) | |
1878f0dc | 606 | { |
b8554d4f | 607 | int new, ret; |
1878f0dc NY |
608 | |
609 | ret = __phy_read_mmd(phydev, devad, regnum); | |
610 | if (ret < 0) | |
611 | return ret; | |
612 | ||
b8554d4f HK |
613 | new = (ret & ~mask) | set; |
614 | if (new == ret) | |
615 | return 0; | |
616 | ||
617 | ret = __phy_write_mmd(phydev, devad, regnum, new); | |
618 | ||
619 | return ret < 0 ? ret : 1; | |
620 | } | |
621 | EXPORT_SYMBOL_GPL(__phy_modify_mmd_changed); | |
622 | ||
623 | /** | |
624 | * phy_modify_mmd_changed - Function for modifying a register on MMD | |
625 | * @phydev: the phy_device struct | |
626 | * @devad: the MMD containing register to modify | |
627 | * @regnum: register number to modify | |
628 | * @mask: bit mask of bits to clear | |
629 | * @set: new value of bits set in mask to write to @regnum | |
630 | * | |
631 | * NOTE: MUST NOT be called from interrupt context, | |
632 | * because the bus read/write functions may wait for an interrupt | |
633 | * to conclude the operation. | |
634 | * | |
635 | * Returns negative errno, 0 if there was no change, and 1 in case of change | |
636 | */ | |
637 | int phy_modify_mmd_changed(struct phy_device *phydev, int devad, u32 regnum, | |
638 | u16 mask, u16 set) | |
639 | { | |
640 | int ret; | |
641 | ||
bec170e5 | 642 | phy_lock_mdio_bus(phydev); |
b8554d4f | 643 | ret = __phy_modify_mmd_changed(phydev, devad, regnum, mask, set); |
bec170e5 | 644 | phy_unlock_mdio_bus(phydev); |
b8554d4f HK |
645 | |
646 | return ret; | |
647 | } | |
648 | EXPORT_SYMBOL_GPL(phy_modify_mmd_changed); | |
649 | ||
650 | /** | |
651 | * __phy_modify_mmd - Convenience function for modifying a register on MMD | |
652 | * @phydev: the phy_device struct | |
653 | * @devad: the MMD containing register to modify | |
654 | * @regnum: register number to modify | |
655 | * @mask: bit mask of bits to clear | |
656 | * @set: new value of bits set in mask to write to @regnum | |
657 | * | |
658 | * NOTE: MUST NOT be called from interrupt context, | |
659 | * because the bus read/write functions may wait for an interrupt | |
660 | * to conclude the operation. | |
661 | */ | |
662 | int __phy_modify_mmd(struct phy_device *phydev, int devad, u32 regnum, | |
663 | u16 mask, u16 set) | |
664 | { | |
665 | int ret; | |
666 | ||
667 | ret = __phy_modify_mmd_changed(phydev, devad, regnum, mask, set); | |
1878f0dc NY |
668 | |
669 | return ret < 0 ? ret : 0; | |
670 | } | |
671 | EXPORT_SYMBOL_GPL(__phy_modify_mmd); | |
672 | ||
673 | /** | |
674 | * phy_modify_mmd - Convenience function for modifying a register on MMD | |
675 | * @phydev: the phy_device struct | |
676 | * @devad: the MMD containing register to modify | |
677 | * @regnum: register number to modify | |
678 | * @mask: bit mask of bits to clear | |
679 | * @set: new value of bits set in mask to write to @regnum | |
680 | * | |
681 | * NOTE: MUST NOT be called from interrupt context, | |
682 | * because the bus read/write functions may wait for an interrupt | |
683 | * to conclude the operation. | |
684 | */ | |
685 | int phy_modify_mmd(struct phy_device *phydev, int devad, u32 regnum, | |
686 | u16 mask, u16 set) | |
687 | { | |
688 | int ret; | |
689 | ||
bec170e5 | 690 | phy_lock_mdio_bus(phydev); |
1878f0dc | 691 | ret = __phy_modify_mmd(phydev, devad, regnum, mask, set); |
bec170e5 | 692 | phy_unlock_mdio_bus(phydev); |
1878f0dc NY |
693 | |
694 | return ret; | |
695 | } | |
696 | EXPORT_SYMBOL_GPL(phy_modify_mmd); | |
697 | ||
78ffc4ac RK |
698 | static int __phy_read_page(struct phy_device *phydev) |
699 | { | |
f86854a2 HK |
700 | if (WARN_ONCE(!phydev->drv->read_page, "read_page callback not available, PHY driver not loaded?\n")) |
701 | return -EOPNOTSUPP; | |
702 | ||
78ffc4ac RK |
703 | return phydev->drv->read_page(phydev); |
704 | } | |
705 | ||
706 | static int __phy_write_page(struct phy_device *phydev, int page) | |
707 | { | |
f86854a2 HK |
708 | if (WARN_ONCE(!phydev->drv->write_page, "write_page callback not available, PHY driver not loaded?\n")) |
709 | return -EOPNOTSUPP; | |
710 | ||
78ffc4ac RK |
711 | return phydev->drv->write_page(phydev, page); |
712 | } | |
713 | ||
714 | /** | |
715 | * phy_save_page() - take the bus lock and save the current page | |
716 | * @phydev: a pointer to a &struct phy_device | |
717 | * | |
718 | * Take the MDIO bus lock, and return the current page number. On error, | |
719 | * returns a negative errno. phy_restore_page() must always be called | |
720 | * after this, irrespective of success or failure of this call. | |
721 | */ | |
722 | int phy_save_page(struct phy_device *phydev) | |
723 | { | |
bec170e5 | 724 | phy_lock_mdio_bus(phydev); |
78ffc4ac RK |
725 | return __phy_read_page(phydev); |
726 | } | |
727 | EXPORT_SYMBOL_GPL(phy_save_page); | |
728 | ||
729 | /** | |
730 | * phy_select_page() - take the bus lock, save the current page, and set a page | |
731 | * @phydev: a pointer to a &struct phy_device | |
732 | * @page: desired page | |
733 | * | |
734 | * Take the MDIO bus lock to protect against concurrent access, save the | |
735 | * current PHY page, and set the current page. On error, returns a | |
736 | * negative errno, otherwise returns the previous page number. | |
737 | * phy_restore_page() must always be called after this, irrespective | |
738 | * of success or failure of this call. | |
739 | */ | |
740 | int phy_select_page(struct phy_device *phydev, int page) | |
741 | { | |
742 | int ret, oldpage; | |
743 | ||
744 | oldpage = ret = phy_save_page(phydev); | |
745 | if (ret < 0) | |
746 | return ret; | |
747 | ||
748 | if (oldpage != page) { | |
749 | ret = __phy_write_page(phydev, page); | |
750 | if (ret < 0) | |
751 | return ret; | |
752 | } | |
753 | ||
754 | return oldpage; | |
755 | } | |
756 | EXPORT_SYMBOL_GPL(phy_select_page); | |
757 | ||
758 | /** | |
759 | * phy_restore_page() - restore the page register and release the bus lock | |
760 | * @phydev: a pointer to a &struct phy_device | |
761 | * @oldpage: the old page, return value from phy_save_page() or phy_select_page() | |
762 | * @ret: operation's return code | |
763 | * | |
764 | * Release the MDIO bus lock, restoring @oldpage if it is a valid page. | |
765 | * This function propagates the earliest error code from the group of | |
766 | * operations. | |
767 | * | |
768 | * Returns: | |
769 | * @oldpage if it was a negative value, otherwise | |
770 | * @ret if it was a negative errno value, otherwise | |
771 | * phy_write_page()'s negative value if it were in error, otherwise | |
772 | * @ret. | |
773 | */ | |
774 | int phy_restore_page(struct phy_device *phydev, int oldpage, int ret) | |
775 | { | |
776 | int r; | |
777 | ||
778 | if (oldpage >= 0) { | |
779 | r = __phy_write_page(phydev, oldpage); | |
780 | ||
781 | /* Propagate the operation return code if the page write | |
782 | * was successful. | |
783 | */ | |
784 | if (ret >= 0 && r < 0) | |
785 | ret = r; | |
786 | } else { | |
787 | /* Propagate the phy page selection error code */ | |
788 | ret = oldpage; | |
789 | } | |
790 | ||
bec170e5 | 791 | phy_unlock_mdio_bus(phydev); |
78ffc4ac RK |
792 | |
793 | return ret; | |
794 | } | |
795 | EXPORT_SYMBOL_GPL(phy_restore_page); | |
796 | ||
797 | /** | |
798 | * phy_read_paged() - Convenience function for reading a paged register | |
799 | * @phydev: a pointer to a &struct phy_device | |
800 | * @page: the page for the phy | |
801 | * @regnum: register number | |
802 | * | |
803 | * Same rules as for phy_read(). | |
804 | */ | |
805 | int phy_read_paged(struct phy_device *phydev, int page, u32 regnum) | |
806 | { | |
807 | int ret = 0, oldpage; | |
808 | ||
809 | oldpage = phy_select_page(phydev, page); | |
810 | if (oldpage >= 0) | |
811 | ret = __phy_read(phydev, regnum); | |
812 | ||
813 | return phy_restore_page(phydev, oldpage, ret); | |
814 | } | |
815 | EXPORT_SYMBOL(phy_read_paged); | |
816 | ||
817 | /** | |
818 | * phy_write_paged() - Convenience function for writing a paged register | |
819 | * @phydev: a pointer to a &struct phy_device | |
820 | * @page: the page for the phy | |
821 | * @regnum: register number | |
822 | * @val: value to write | |
823 | * | |
824 | * Same rules as for phy_write(). | |
825 | */ | |
826 | int phy_write_paged(struct phy_device *phydev, int page, u32 regnum, u16 val) | |
827 | { | |
828 | int ret = 0, oldpage; | |
829 | ||
830 | oldpage = phy_select_page(phydev, page); | |
831 | if (oldpage >= 0) | |
832 | ret = __phy_write(phydev, regnum, val); | |
833 | ||
834 | return phy_restore_page(phydev, oldpage, ret); | |
835 | } | |
836 | EXPORT_SYMBOL(phy_write_paged); | |
837 | ||
838 | /** | |
bf22b343 | 839 | * phy_modify_paged_changed() - Function for modifying a paged register |
78ffc4ac RK |
840 | * @phydev: a pointer to a &struct phy_device |
841 | * @page: the page for the phy | |
842 | * @regnum: register number | |
843 | * @mask: bit mask of bits to clear | |
844 | * @set: bit mask of bits to set | |
845 | * | |
bf22b343 | 846 | * Returns negative errno, 0 if there was no change, and 1 in case of change |
78ffc4ac | 847 | */ |
bf22b343 HK |
848 | int phy_modify_paged_changed(struct phy_device *phydev, int page, u32 regnum, |
849 | u16 mask, u16 set) | |
78ffc4ac RK |
850 | { |
851 | int ret = 0, oldpage; | |
852 | ||
853 | oldpage = phy_select_page(phydev, page); | |
854 | if (oldpage >= 0) | |
bf22b343 | 855 | ret = __phy_modify_changed(phydev, regnum, mask, set); |
78ffc4ac RK |
856 | |
857 | return phy_restore_page(phydev, oldpage, ret); | |
858 | } | |
bf22b343 HK |
859 | EXPORT_SYMBOL(phy_modify_paged_changed); |
860 | ||
861 | /** | |
862 | * phy_modify_paged() - Convenience function for modifying a paged register | |
863 | * @phydev: a pointer to a &struct phy_device | |
864 | * @page: the page for the phy | |
865 | * @regnum: register number | |
866 | * @mask: bit mask of bits to clear | |
867 | * @set: bit mask of bits to set | |
868 | * | |
869 | * Same rules as for phy_read() and phy_write(). | |
870 | */ | |
871 | int phy_modify_paged(struct phy_device *phydev, int page, u32 regnum, | |
872 | u16 mask, u16 set) | |
873 | { | |
874 | int ret = phy_modify_paged_changed(phydev, page, regnum, mask, set); | |
875 | ||
876 | return ret < 0 ? ret : 0; | |
877 | } | |
78ffc4ac | 878 | EXPORT_SYMBOL(phy_modify_paged); |