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-rw-r--r--drivers/net/chelsio/mv88e1xxx.c397
1 files changed, 397 insertions, 0 deletions
diff --git a/drivers/net/chelsio/mv88e1xxx.c b/drivers/net/chelsio/mv88e1xxx.c
new file mode 100644
index 000000000000..28ac93ff7c4f
--- /dev/null
+++ b/drivers/net/chelsio/mv88e1xxx.c
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1/* $Date: 2005/10/24 23:18:13 $ $RCSfile: mv88e1xxx.c,v $ $Revision: 1.49 $ */
2#include "common.h"
3#include "mv88e1xxx.h"
4#include "cphy.h"
5#include "elmer0.h"
6
7/* MV88E1XXX MDI crossover register values */
8#define CROSSOVER_MDI 0
9#define CROSSOVER_MDIX 1
10#define CROSSOVER_AUTO 3
11
12#define INTR_ENABLE_MASK 0x6CA0
13
14/*
15 * Set the bits given by 'bitval' in PHY register 'reg'.
16 */
17static void mdio_set_bit(struct cphy *cphy, int reg, u32 bitval)
18{
19 u32 val;
20
21 (void) simple_mdio_read(cphy, reg, &val);
22 (void) simple_mdio_write(cphy, reg, val | bitval);
23}
24
25/*
26 * Clear the bits given by 'bitval' in PHY register 'reg'.
27 */
28static void mdio_clear_bit(struct cphy *cphy, int reg, u32 bitval)
29{
30 u32 val;
31
32 (void) simple_mdio_read(cphy, reg, &val);
33 (void) simple_mdio_write(cphy, reg, val & ~bitval);
34}
35
36/*
37 * NAME: phy_reset
38 *
39 * DESC: Reset the given PHY's port. NOTE: This is not a global
40 * chip reset.
41 *
42 * PARAMS: cphy - Pointer to PHY instance data.
43 *
44 * RETURN: 0 - Successfull reset.
45 * -1 - Timeout.
46 */
47static int mv88e1xxx_reset(struct cphy *cphy, int wait)
48{
49 u32 ctl;
50 int time_out = 1000;
51
52 mdio_set_bit(cphy, MII_BMCR, BMCR_RESET);
53
54 do {
55 (void) simple_mdio_read(cphy, MII_BMCR, &ctl);
56 ctl &= BMCR_RESET;
57 if (ctl)
58 udelay(1);
59 } while (ctl && --time_out);
60
61 return ctl ? -1 : 0;
62}
63
64static int mv88e1xxx_interrupt_enable(struct cphy *cphy)
65{
66 /* Enable PHY interrupts. */
67 (void) simple_mdio_write(cphy, MV88E1XXX_INTERRUPT_ENABLE_REGISTER,
68 INTR_ENABLE_MASK);
69
70 /* Enable Marvell interrupts through Elmer0. */
71 if (t1_is_asic(cphy->adapter)) {
72 u32 elmer;
73
74 t1_tpi_read(cphy->adapter, A_ELMER0_INT_ENABLE, &elmer);
75 elmer |= ELMER0_GP_BIT1;
76 if (is_T2(cphy->adapter)) {
77 elmer |= ELMER0_GP_BIT2|ELMER0_GP_BIT3|ELMER0_GP_BIT4;
78 }
79 t1_tpi_write(cphy->adapter, A_ELMER0_INT_ENABLE, 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, 0);
88
89 /* Disable Marvell interrupts through Elmer0. */
90 if (t1_is_asic(cphy->adapter)) {
91 u32 elmer;
92
93 t1_tpi_read(cphy->adapter, A_ELMER0_INT_ENABLE, &elmer);
94 elmer &= ~ELMER0_GP_BIT1;
95 if (is_T2(cphy->adapter)) {
96 elmer &= ~(ELMER0_GP_BIT2|ELMER0_GP_BIT3|ELMER0_GP_BIT4);
97 }
98 t1_tpi_write(cphy->adapter, A_ELMER0_INT_ENABLE, elmer);
99 }
100 return 0;
101}
102
103static int mv88e1xxx_interrupt_clear(struct cphy *cphy)
104{
105 u32 elmer;
106
107 /* Clear PHY interrupts by reading the register. */
108 (void) simple_mdio_read(cphy,
109 MV88E1XXX_INTERRUPT_STATUS_REGISTER, &elmer);
110
111 /* Clear Marvell interrupts through Elmer0. */
112 if (t1_is_asic(cphy->adapter)) {
113 t1_tpi_read(cphy->adapter, A_ELMER0_INT_CAUSE, &elmer);
114 elmer |= ELMER0_GP_BIT1;
115 if (is_T2(cphy->adapter)) {
116 elmer |= ELMER0_GP_BIT2|ELMER0_GP_BIT3|ELMER0_GP_BIT4;
117 }
118 t1_tpi_write(cphy->adapter, A_ELMER0_INT_CAUSE, elmer);
119 }
120 return 0;
121}
122
123/*
124 * Set the PHY speed and duplex. This also disables auto-negotiation, except
125 * for 1Gb/s, where auto-negotiation is mandatory.
126 */
127static int mv88e1xxx_set_speed_duplex(struct cphy *phy, int speed, int duplex)
128{
129 u32 ctl;
130
131 (void) simple_mdio_read(phy, MII_BMCR, &ctl);
132 if (speed >= 0) {
133 ctl &= ~(BMCR_SPEED100 | BMCR_SPEED1000 | BMCR_ANENABLE);
134 if (speed == SPEED_100)
135 ctl |= BMCR_SPEED100;
136 else if (speed == SPEED_1000)
137 ctl |= BMCR_SPEED1000;
138 }
139 if (duplex >= 0) {
140 ctl &= ~(BMCR_FULLDPLX | BMCR_ANENABLE);
141 if (duplex == DUPLEX_FULL)
142 ctl |= BMCR_FULLDPLX;
143 }
144 if (ctl & BMCR_SPEED1000) /* auto-negotiation required for 1Gb/s */
145 ctl |= BMCR_ANENABLE;
146 (void) simple_mdio_write(phy, MII_BMCR, ctl);
147 return 0;
148}
149
150static int mv88e1xxx_crossover_set(struct cphy *cphy, int crossover)
151{
152 u32 data32;
153
154 (void) simple_mdio_read(cphy,
155 MV88E1XXX_SPECIFIC_CNTRL_REGISTER, &data32);
156 data32 &= ~V_PSCR_MDI_XOVER_MODE(M_PSCR_MDI_XOVER_MODE);
157 data32 |= V_PSCR_MDI_XOVER_MODE(crossover);
158 (void) simple_mdio_write(cphy,
159 MV88E1XXX_SPECIFIC_CNTRL_REGISTER, data32);
160 return 0;
161}
162
163static int mv88e1xxx_autoneg_enable(struct cphy *cphy)
164{
165 u32 ctl;
166
167 (void) mv88e1xxx_crossover_set(cphy, CROSSOVER_AUTO);
168
169 (void) simple_mdio_read(cphy, MII_BMCR, &ctl);
170 /* restart autoneg for change to take effect */
171 ctl |= BMCR_ANENABLE | BMCR_ANRESTART;
172 (void) simple_mdio_write(cphy, MII_BMCR, ctl);
173 return 0;
174}
175
176static int mv88e1xxx_autoneg_disable(struct cphy *cphy)
177{
178 u32 ctl;
179
180 /*
181 * Crossover *must* be set to manual in order to disable auto-neg.
182 * The Alaska FAQs document highlights this point.
183 */
184 (void) mv88e1xxx_crossover_set(cphy, CROSSOVER_MDI);
185
186 /*
187 * Must include autoneg reset when disabling auto-neg. This
188 * is described in the Alaska FAQ document.
189 */
190 (void) simple_mdio_read(cphy, MII_BMCR, &ctl);
191 ctl &= ~BMCR_ANENABLE;
192 (void) simple_mdio_write(cphy, MII_BMCR, ctl | BMCR_ANRESTART);
193 return 0;
194}
195
196static int mv88e1xxx_autoneg_restart(struct cphy *cphy)
197{
198 mdio_set_bit(cphy, MII_BMCR, BMCR_ANRESTART);
199 return 0;
200}
201
202static int mv88e1xxx_advertise(struct cphy *phy, unsigned int advertise_map)
203{
204 u32 val = 0;
205
206 if (advertise_map &
207 (ADVERTISED_1000baseT_Half | ADVERTISED_1000baseT_Full)) {
208 (void) simple_mdio_read(phy, MII_GBCR, &val);
209 val &= ~(GBCR_ADV_1000HALF | GBCR_ADV_1000FULL);
210 if (advertise_map & ADVERTISED_1000baseT_Half)
211 val |= GBCR_ADV_1000HALF;
212 if (advertise_map & ADVERTISED_1000baseT_Full)
213 val |= GBCR_ADV_1000FULL;
214 }
215 (void) simple_mdio_write(phy, MII_GBCR, val);
216
217 val = 1;
218 if (advertise_map & ADVERTISED_10baseT_Half)
219 val |= ADVERTISE_10HALF;
220 if (advertise_map & ADVERTISED_10baseT_Full)
221 val |= ADVERTISE_10FULL;
222 if (advertise_map & ADVERTISED_100baseT_Half)
223 val |= ADVERTISE_100HALF;
224 if (advertise_map & ADVERTISED_100baseT_Full)
225 val |= ADVERTISE_100FULL;
226 if (advertise_map & ADVERTISED_PAUSE)
227 val |= ADVERTISE_PAUSE;
228 if (advertise_map & ADVERTISED_ASYM_PAUSE)
229 val |= ADVERTISE_PAUSE_ASYM;
230 (void) simple_mdio_write(phy, MII_ADVERTISE, val);
231 return 0;
232}
233
234static int mv88e1xxx_set_loopback(struct cphy *cphy, int on)
235{
236 if (on)
237 mdio_set_bit(cphy, MII_BMCR, BMCR_LOOPBACK);
238 else
239 mdio_clear_bit(cphy, MII_BMCR, BMCR_LOOPBACK);
240 return 0;
241}
242
243static int mv88e1xxx_get_link_status(struct cphy *cphy, int *link_ok,
244 int *speed, int *duplex, int *fc)
245{
246 u32 status;
247 int sp = -1, dplx = -1, pause = 0;
248
249 (void) simple_mdio_read(cphy,
250 MV88E1XXX_SPECIFIC_STATUS_REGISTER, &status);
251 if ((status & V_PSSR_STATUS_RESOLVED) != 0) {
252 if (status & V_PSSR_RX_PAUSE)
253 pause |= PAUSE_RX;
254 if (status & V_PSSR_TX_PAUSE)
255 pause |= PAUSE_TX;
256 dplx = (status & V_PSSR_DUPLEX) ? DUPLEX_FULL : DUPLEX_HALF;
257 sp = G_PSSR_SPEED(status);
258 if (sp == 0)
259 sp = SPEED_10;
260 else if (sp == 1)
261 sp = SPEED_100;
262 else
263 sp = SPEED_1000;
264 }
265 if (link_ok)
266 *link_ok = (status & V_PSSR_LINK) != 0;
267 if (speed)
268 *speed = sp;
269 if (duplex)
270 *duplex = dplx;
271 if (fc)
272 *fc = pause;
273 return 0;
274}
275
276static int mv88e1xxx_downshift_set(struct cphy *cphy, int downshift_enable)
277{
278 u32 val;
279
280 (void) simple_mdio_read(cphy,
281 MV88E1XXX_EXT_PHY_SPECIFIC_CNTRL_REGISTER, &val);
282
283 /*
284 * Set the downshift counter to 2 so we try to establish Gb link
285 * twice before downshifting.
286 */
287 val &= ~(V_DOWNSHIFT_ENABLE | V_DOWNSHIFT_CNT(M_DOWNSHIFT_CNT));
288
289 if (downshift_enable)
290 val |= V_DOWNSHIFT_ENABLE | V_DOWNSHIFT_CNT(2);
291 (void) simple_mdio_write(cphy,
292 MV88E1XXX_EXT_PHY_SPECIFIC_CNTRL_REGISTER, val);
293 return 0;
294}
295
296static int mv88e1xxx_interrupt_handler(struct cphy *cphy)
297{
298 int cphy_cause = 0;
299 u32 status;
300
301 /*
302 * Loop until cause reads zero. Need to handle bouncing interrupts.
303 */
304 while (1) {
305 u32 cause;
306
307 (void) simple_mdio_read(cphy,
308 MV88E1XXX_INTERRUPT_STATUS_REGISTER,
309 &cause);
310 cause &= INTR_ENABLE_MASK;
311 if (!cause) break;
312
313 if (cause & MV88E1XXX_INTR_LINK_CHNG) {
314 (void) simple_mdio_read(cphy,
315 MV88E1XXX_SPECIFIC_STATUS_REGISTER, &status);
316
317 if (status & MV88E1XXX_INTR_LINK_CHNG) {
318 cphy->state |= PHY_LINK_UP;
319 } else {
320 cphy->state &= ~PHY_LINK_UP;
321 if (cphy->state & PHY_AUTONEG_EN)
322 cphy->state &= ~PHY_AUTONEG_RDY;
323 cphy_cause |= cphy_cause_link_change;
324 }
325 }
326
327 if (cause & MV88E1XXX_INTR_AUTONEG_DONE)
328 cphy->state |= PHY_AUTONEG_RDY;
329
330 if ((cphy->state & (PHY_LINK_UP | PHY_AUTONEG_RDY)) ==
331 (PHY_LINK_UP | PHY_AUTONEG_RDY))
332 cphy_cause |= cphy_cause_link_change;
333 }
334 return cphy_cause;
335}
336
337static void mv88e1xxx_destroy(struct cphy *cphy)
338{
339 kfree(cphy);
340}
341
342static struct cphy_ops mv88e1xxx_ops = {
343 .destroy = mv88e1xxx_destroy,
344 .reset = mv88e1xxx_reset,
345 .interrupt_enable = mv88e1xxx_interrupt_enable,
346 .interrupt_disable = mv88e1xxx_interrupt_disable,
347 .interrupt_clear = mv88e1xxx_interrupt_clear,
348 .interrupt_handler = mv88e1xxx_interrupt_handler,
349 .autoneg_enable = mv88e1xxx_autoneg_enable,
350 .autoneg_disable = mv88e1xxx_autoneg_disable,
351 .autoneg_restart = mv88e1xxx_autoneg_restart,
352 .advertise = mv88e1xxx_advertise,
353 .set_loopback = mv88e1xxx_set_loopback,
354 .set_speed_duplex = mv88e1xxx_set_speed_duplex,
355 .get_link_status = mv88e1xxx_get_link_status,
356};
357
358static struct cphy *mv88e1xxx_phy_create(adapter_t *adapter, int phy_addr,
359 struct mdio_ops *mdio_ops)
360{
361 struct cphy *cphy = kzalloc(sizeof(*cphy), GFP_KERNEL);
362
363 if (!cphy) return NULL;
364
365 cphy_init(cphy, adapter, phy_addr, &mv88e1xxx_ops, mdio_ops);
366
367 /* Configure particular PHY's to run in a different mode. */
368 if ((board_info(adapter)->caps & SUPPORTED_TP) &&
369 board_info(adapter)->chip_phy == CHBT_PHY_88E1111) {
370 /*
371 * Configure the PHY transmitter as class A to reduce EMI.
372 */
373 (void) simple_mdio_write(cphy,
374 MV88E1XXX_EXTENDED_ADDR_REGISTER, 0xB);
375 (void) simple_mdio_write(cphy,
376 MV88E1XXX_EXTENDED_REGISTER, 0x8004);
377 }
378 (void) mv88e1xxx_downshift_set(cphy, 1); /* Enable downshift */
379
380 /* LED */
381 if (is_T2(adapter)) {
382 (void) simple_mdio_write(cphy,
383 MV88E1XXX_LED_CONTROL_REGISTER, 0x1);
384 }
385
386 return cphy;
387}
388
389static int mv88e1xxx_phy_reset(adapter_t* adapter)
390{
391 return 0;
392}
393
394struct gphy t1_mv88e1xxx_ops = {
395 mv88e1xxx_phy_create,
396 mv88e1xxx_phy_reset
397};
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-18 17:55:41 -0500