1// SPDX-License-Identifier: GPL-2.0
2/* $Date: 2005/10/24 23:18:13 $ $RCSfile: mv88e1xxx.c,v $ $Revision: 1.49 $ */
3#include "common.h"
4#include "mv88e1xxx.h"
5#include "cphy.h"
6#include "elmer0.h"
7
8/* MV88E1XXX MDI crossover register values */
9#define CROSSOVER_MDI 0
10#define CROSSOVER_MDIX 1
11#define CROSSOVER_AUTO 3
12
13#define INTR_ENABLE_MASK 0x6CA0
14
15/*
16 * Set the bits given by 'bitval' in PHY register 'reg'.
17 */
18static void mdio_set_bit(struct cphy *cphy, int reg, u32 bitval)
19{
20 u32 val;
21
22 (void) simple_mdio_read(cphy, reg, valp: &val);
23 (void) simple_mdio_write(cphy, reg, val: val | bitval);
24}
25
26/*
27 * Clear the bits given by 'bitval' in PHY register 'reg'.
28 */
29static void mdio_clear_bit(struct cphy *cphy, int reg, u32 bitval)
30{
31 u32 val;
32
33 (void) simple_mdio_read(cphy, reg, valp: &val);
34 (void) simple_mdio_write(cphy, reg, val: val & ~bitval);
35}
36
37/*
38 * NAME: phy_reset
39 *
40 * DESC: Reset the given PHY's port. NOTE: This is not a global
41 * chip reset.
42 *
43 * PARAMS: cphy - Pointer to PHY instance data.
44 *
45 * RETURN: 0 - Successful reset.
46 * -1 - Timeout.
47 */
48static int mv88e1xxx_reset(struct cphy *cphy, int wait)
49{
50 u32 ctl;
51 int time_out = 1000;
52
53 mdio_set_bit(cphy, MII_BMCR, BMCR_RESET);
54
55 do {
56 (void) simple_mdio_read(cphy, MII_BMCR, valp: &ctl);
57 ctl &= BMCR_RESET;
58 if (ctl)
59 udelay(1);
60 } while (ctl && --time_out);
61
62 return ctl ? -1 : 0;
63}
64
65static int mv88e1xxx_interrupt_enable(struct cphy *cphy)
66{
67 /* Enable PHY interrupts. */
68 (void) simple_mdio_write(cphy, MV88E1XXX_INTERRUPT_ENABLE_REGISTER,
69 INTR_ENABLE_MASK);
70
71 /* Enable Marvell interrupts through Elmer0. */
72 if (t1_is_asic(adapter: cphy->adapter)) {
73 u32 elmer;
74
75 t1_tpi_read(adapter: cphy->adapter, A_ELMER0_INT_ENABLE, value: &elmer);
76 elmer |= ELMER0_GP_BIT1;
77 if (is_T2(cphy->adapter))
78 elmer |= ELMER0_GP_BIT2 | ELMER0_GP_BIT3 | ELMER0_GP_BIT4;
79 t1_tpi_write(adapter: cphy->adapter, A_ELMER0_INT_ENABLE, value: elmer);
80 }
81 return 0;
82}
83
84static int mv88e1xxx_interrupt_disable(struct cphy *cphy)
85{
86 /* Disable all phy interrupts. */
87 (void) simple_mdio_write(cphy, MV88E1XXX_INTERRUPT_ENABLE_REGISTER, val: 0);
88
89 /* Disable Marvell interrupts through Elmer0. */
90 if (t1_is_asic(adapter: cphy->adapter)) {
91 u32 elmer;
92
93 t1_tpi_read(adapter: cphy->adapter, A_ELMER0_INT_ENABLE, value: &elmer);
94 elmer &= ~ELMER0_GP_BIT1;
95 if (is_T2(cphy->adapter))
96 elmer &= ~(ELMER0_GP_BIT2|ELMER0_GP_BIT3|ELMER0_GP_BIT4);
97 t1_tpi_write(adapter: cphy->adapter, A_ELMER0_INT_ENABLE, value: elmer);
98 }
99 return 0;
100}
101
102static int mv88e1xxx_interrupt_clear(struct cphy *cphy)
103{
104 u32 elmer;
105
106 /* Clear PHY interrupts by reading the register. */
107 (void) simple_mdio_read(cphy,
108 MV88E1XXX_INTERRUPT_STATUS_REGISTER, valp: &elmer);
109
110 /* Clear Marvell interrupts through Elmer0. */
111 if (t1_is_asic(adapter: cphy->adapter)) {
112 t1_tpi_read(adapter: cphy->adapter, A_ELMER0_INT_CAUSE, value: &elmer);
113 elmer |= ELMER0_GP_BIT1;
114 if (is_T2(cphy->adapter))
115 elmer |= ELMER0_GP_BIT2|ELMER0_GP_BIT3|ELMER0_GP_BIT4;
116 t1_tpi_write(adapter: cphy->adapter, A_ELMER0_INT_CAUSE, value: elmer);
117 }
118 return 0;
119}
120
121/*
122 * Set the PHY speed and duplex. This also disables auto-negotiation, except
123 * for 1Gb/s, where auto-negotiation is mandatory.
124 */
125static int mv88e1xxx_set_speed_duplex(struct cphy *phy, int speed, int duplex)
126{
127 u32 ctl;
128
129 (void) simple_mdio_read(cphy: phy, MII_BMCR, valp: &ctl);
130 if (speed >= 0) {
131 ctl &= ~(BMCR_SPEED100 | BMCR_SPEED1000 | BMCR_ANENABLE);
132 if (speed == SPEED_100)
133 ctl |= BMCR_SPEED100;
134 else if (speed == SPEED_1000)
135 ctl |= BMCR_SPEED1000;
136 }
137 if (duplex >= 0) {
138 ctl &= ~(BMCR_FULLDPLX | BMCR_ANENABLE);
139 if (duplex == DUPLEX_FULL)
140 ctl |= BMCR_FULLDPLX;
141 }
142 if (ctl & BMCR_SPEED1000) /* auto-negotiation required for 1Gb/s */
143 ctl |= BMCR_ANENABLE;
144 (void) simple_mdio_write(cphy: phy, MII_BMCR, val: ctl);
145 return 0;
146}
147
148static int mv88e1xxx_crossover_set(struct cphy *cphy, int crossover)
149{
150 u32 data32;
151
152 (void) simple_mdio_read(cphy,
153 MV88E1XXX_SPECIFIC_CNTRL_REGISTER, valp: &data32);
154 data32 &= ~V_PSCR_MDI_XOVER_MODE(M_PSCR_MDI_XOVER_MODE);
155 data32 |= V_PSCR_MDI_XOVER_MODE(crossover);
156 (void) simple_mdio_write(cphy,
157 MV88E1XXX_SPECIFIC_CNTRL_REGISTER, val: data32);
158 return 0;
159}
160
161static int mv88e1xxx_autoneg_enable(struct cphy *cphy)
162{
163 u32 ctl;
164
165 (void) mv88e1xxx_crossover_set(cphy, CROSSOVER_AUTO);
166
167 (void) simple_mdio_read(cphy, MII_BMCR, valp: &ctl);
168 /* restart autoneg for change to take effect */
169 ctl |= BMCR_ANENABLE | BMCR_ANRESTART;
170 (void) simple_mdio_write(cphy, MII_BMCR, val: ctl);
171 return 0;
172}
173
174static int mv88e1xxx_autoneg_disable(struct cphy *cphy)
175{
176 u32 ctl;
177
178 /*
179 * Crossover *must* be set to manual in order to disable auto-neg.
180 * The Alaska FAQs document highlights this point.
181 */
182 (void) mv88e1xxx_crossover_set(cphy, CROSSOVER_MDI);
183
184 /*
185 * Must include autoneg reset when disabling auto-neg. This
186 * is described in the Alaska FAQ document.
187 */
188 (void) simple_mdio_read(cphy, MII_BMCR, valp: &ctl);
189 ctl &= ~BMCR_ANENABLE;
190 (void) simple_mdio_write(cphy, MII_BMCR, val: ctl | BMCR_ANRESTART);
191 return 0;
192}
193
194static int mv88e1xxx_autoneg_restart(struct cphy *cphy)
195{
196 mdio_set_bit(cphy, MII_BMCR, BMCR_ANRESTART);
197 return 0;
198}
199
200static int mv88e1xxx_advertise(struct cphy *phy, unsigned int advertise_map)
201{
202 u32 val = 0;
203
204 if (advertise_map &
205 (ADVERTISED_1000baseT_Half | ADVERTISED_1000baseT_Full)) {
206 (void) simple_mdio_read(cphy: phy, MII_GBCR, valp: &val);
207 val &= ~(GBCR_ADV_1000HALF | GBCR_ADV_1000FULL);
208 if (advertise_map & ADVERTISED_1000baseT_Half)
209 val |= GBCR_ADV_1000HALF;
210 if (advertise_map & ADVERTISED_1000baseT_Full)
211 val |= GBCR_ADV_1000FULL;
212 }
213 (void) simple_mdio_write(cphy: phy, MII_GBCR, val);
214
215 val = 1;
216 if (advertise_map & ADVERTISED_10baseT_Half)
217 val |= ADVERTISE_10HALF;
218 if (advertise_map & ADVERTISED_10baseT_Full)
219 val |= ADVERTISE_10FULL;
220 if (advertise_map & ADVERTISED_100baseT_Half)
221 val |= ADVERTISE_100HALF;
222 if (advertise_map & ADVERTISED_100baseT_Full)
223 val |= ADVERTISE_100FULL;
224 if (advertise_map & ADVERTISED_PAUSE)
225 val |= ADVERTISE_PAUSE;
226 if (advertise_map & ADVERTISED_ASYM_PAUSE)
227 val |= ADVERTISE_PAUSE_ASYM;
228 (void) simple_mdio_write(cphy: phy, MII_ADVERTISE, val);
229 return 0;
230}
231
232static int mv88e1xxx_set_loopback(struct cphy *cphy, int on)
233{
234 if (on)
235 mdio_set_bit(cphy, MII_BMCR, BMCR_LOOPBACK);
236 else
237 mdio_clear_bit(cphy, MII_BMCR, BMCR_LOOPBACK);
238 return 0;
239}
240
241static int mv88e1xxx_get_link_status(struct cphy *cphy, int *link_ok,
242 int *speed, int *duplex, int *fc)
243{
244 u32 status;
245 int sp = -1, dplx = -1, pause = 0;
246
247 (void) simple_mdio_read(cphy,
248 MV88E1XXX_SPECIFIC_STATUS_REGISTER, valp: &status);
249 if ((status & V_PSSR_STATUS_RESOLVED) != 0) {
250 if (status & V_PSSR_RX_PAUSE)
251 pause |= PAUSE_RX;
252 if (status & V_PSSR_TX_PAUSE)
253 pause |= PAUSE_TX;
254 dplx = (status & V_PSSR_DUPLEX) ? DUPLEX_FULL : DUPLEX_HALF;
255 sp = G_PSSR_SPEED(status);
256 if (sp == 0)
257 sp = SPEED_10;
258 else if (sp == 1)
259 sp = SPEED_100;
260 else
261 sp = SPEED_1000;
262 }
263 if (link_ok)
264 *link_ok = (status & V_PSSR_LINK) != 0;
265 if (speed)
266 *speed = sp;
267 if (duplex)
268 *duplex = dplx;
269 if (fc)
270 *fc = pause;
271 return 0;
272}
273
274static int mv88e1xxx_downshift_set(struct cphy *cphy, int downshift_enable)
275{
276 u32 val;
277
278 (void) simple_mdio_read(cphy,
279 MV88E1XXX_EXT_PHY_SPECIFIC_CNTRL_REGISTER, valp: &val);
280
281 /*
282 * Set the downshift counter to 2 so we try to establish Gb link
283 * twice before downshifting.
284 */
285 val &= ~(V_DOWNSHIFT_ENABLE | V_DOWNSHIFT_CNT(M_DOWNSHIFT_CNT));
286
287 if (downshift_enable)
288 val |= V_DOWNSHIFT_ENABLE | V_DOWNSHIFT_CNT(2);
289 (void) simple_mdio_write(cphy,
290 MV88E1XXX_EXT_PHY_SPECIFIC_CNTRL_REGISTER, val);
291 return 0;
292}
293
294static int mv88e1xxx_interrupt_handler(struct cphy *cphy)
295{
296 int cphy_cause = 0;
297 u32 status;
298
299 /*
300 * Loop until cause reads zero. Need to handle bouncing interrupts.
301 */
302 while (1) {
303 u32 cause;
304
305 (void) simple_mdio_read(cphy,
306 MV88E1XXX_INTERRUPT_STATUS_REGISTER,
307 valp: &cause);
308 cause &= INTR_ENABLE_MASK;
309 if (!cause)
310 break;
311
312 if (cause & MV88E1XXX_INTR_LINK_CHNG) {
313 (void) simple_mdio_read(cphy,
314 MV88E1XXX_SPECIFIC_STATUS_REGISTER, valp: &status);
315
316 if (status & MV88E1XXX_INTR_LINK_CHNG)
317 cphy->state |= PHY_LINK_UP;
318 else {
319 cphy->state &= ~PHY_LINK_UP;
320 if (cphy->state & PHY_AUTONEG_EN)
321 cphy->state &= ~PHY_AUTONEG_RDY;
322 cphy_cause |= cphy_cause_link_change;
323 }
324 }
325
326 if (cause & MV88E1XXX_INTR_AUTONEG_DONE)
327 cphy->state |= PHY_AUTONEG_RDY;
328
329 if ((cphy->state & (PHY_LINK_UP | PHY_AUTONEG_RDY)) ==
330 (PHY_LINK_UP | PHY_AUTONEG_RDY))
331 cphy_cause |= cphy_cause_link_change;
332 }
333 return cphy_cause;
334}
335
336static void mv88e1xxx_destroy(struct cphy *cphy)
337{
338 kfree(objp: cphy);
339}
340
341static const struct cphy_ops mv88e1xxx_ops = {
342 .destroy = mv88e1xxx_destroy,
343 .reset = mv88e1xxx_reset,
344 .interrupt_enable = mv88e1xxx_interrupt_enable,
345 .interrupt_disable = mv88e1xxx_interrupt_disable,
346 .interrupt_clear = mv88e1xxx_interrupt_clear,
347 .interrupt_handler = mv88e1xxx_interrupt_handler,
348 .autoneg_enable = mv88e1xxx_autoneg_enable,
349 .autoneg_disable = mv88e1xxx_autoneg_disable,
350 .autoneg_restart = mv88e1xxx_autoneg_restart,
351 .advertise = mv88e1xxx_advertise,
352 .set_loopback = mv88e1xxx_set_loopback,
353 .set_speed_duplex = mv88e1xxx_set_speed_duplex,
354 .get_link_status = mv88e1xxx_get_link_status,
355};
356
357static struct cphy *mv88e1xxx_phy_create(struct net_device *dev, int phy_addr,
358 const struct mdio_ops *mdio_ops)
359{
360 struct adapter *adapter = netdev_priv(dev);
361 struct cphy *cphy = kzalloc(size: sizeof(*cphy), GFP_KERNEL);
362
363 if (!cphy)
364 return NULL;
365
366 cphy_init(phy: cphy, dev, phy_addr, phy_ops: &mv88e1xxx_ops, mdio_ops);
367
368 /* Configure particular PHY's to run in a different mode. */
369 if ((board_info(adapter)->caps & SUPPORTED_TP) &&
370 board_info(adapter)->chip_phy == CHBT_PHY_88E1111) {
371 /*
372 * Configure the PHY transmitter as class A to reduce EMI.
373 */
374 (void) simple_mdio_write(cphy,
375 MV88E1XXX_EXTENDED_ADDR_REGISTER, val: 0xB);
376 (void) simple_mdio_write(cphy,
377 MV88E1XXX_EXTENDED_REGISTER, val: 0x8004);
378 }
379 (void) mv88e1xxx_downshift_set(cphy, downshift_enable: 1); /* Enable downshift */
380
381 /* LED */
382 if (is_T2(adapter)) {
383 (void) simple_mdio_write(cphy,
384 MV88E1XXX_LED_CONTROL_REGISTER, val: 0x1);
385 }
386
387 return cphy;
388}
389
390static int mv88e1xxx_phy_reset(adapter_t* adapter)
391{
392 return 0;
393}
394
395const struct gphy t1_mv88e1xxx_ops = {
396 .create = mv88e1xxx_phy_create,
397 .reset = mv88e1xxx_phy_reset
398};
399

source code of linux/drivers/net/ethernet/chelsio/cxgb/mv88e1xxx.c