1 /***********************license start***************
2 * Author: Cavium Networks
3 *
4 * Contact: support@caviumnetworks.com
5 * This file is part of the OCTEON SDK
6 *
7 * Copyright (c) 2003-2008 Cavium Networks
8 *
9 * This file is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License, Version 2, as
11 * published by the Free Software Foundation.
12 *
13 * This file is distributed in the hope that it will be useful, but
14 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
15 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
16 * NONINFRINGEMENT. See the GNU General Public License for more
17 * details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this file; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 * or visit http://www.gnu.org/licenses/.
23 *
24 * This file may also be available under a different license from Cavium.
25 * Contact Cavium Networks for more information
26 ***********************license end**************************************/
27
28 /*
29 * Functions for SGMII initialization, configuration,
30 * and monitoring.
31 */
32
33 #include <asm/octeon/octeon.h>
34
35 #include "cvmx-config.h"
36
37 #include "cvmx-mdio.h"
38 #include "cvmx-helper.h"
39 #include "cvmx-helper-board.h"
40
41 #include "cvmx-gmxx-defs.h"
42 #include "cvmx-pcsx-defs.h"
43
44 void __cvmx_interrupt_gmxx_enable(int interface);
45 void __cvmx_interrupt_pcsx_intx_en_reg_enable(int index, int block);
46 void __cvmx_interrupt_pcsxx_int_en_reg_enable(int index);
47
48 /**
49 * Perform initialization required only once for an SGMII port.
50 *
51 * @interface: Interface to init
52 * @index: Index of prot on the interface
53 *
54 * Returns Zero on success, negative on failure
55 */
__cvmx_helper_sgmii_hardware_init_one_time(int interface,int index)56 static int __cvmx_helper_sgmii_hardware_init_one_time(int interface, int index)
57 {
58 const uint64_t clock_mhz = cvmx_sysinfo_get()->cpu_clock_hz / 1000000;
59 union cvmx_pcsx_miscx_ctl_reg pcs_misc_ctl_reg;
60 union cvmx_pcsx_linkx_timer_count_reg pcsx_linkx_timer_count_reg;
61 union cvmx_gmxx_prtx_cfg gmxx_prtx_cfg;
62
63 /* Disable GMX */
64 gmxx_prtx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
65 gmxx_prtx_cfg.s.en = 0;
66 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmxx_prtx_cfg.u64);
67
68 /*
69 * Write PCS*_LINK*_TIMER_COUNT_REG[COUNT] with the
70 * appropriate value. 1000BASE-X specifies a 10ms
71 * interval. SGMII specifies a 1.6ms interval.
72 */
73 pcs_misc_ctl_reg.u64 =
74 cvmx_read_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface));
75 pcsx_linkx_timer_count_reg.u64 =
76 cvmx_read_csr(CVMX_PCSX_LINKX_TIMER_COUNT_REG(index, interface));
77 if (pcs_misc_ctl_reg.s.mode) {
78 /* 1000BASE-X */
79 pcsx_linkx_timer_count_reg.s.count =
80 (10000ull * clock_mhz) >> 10;
81 } else {
82 /* SGMII */
83 pcsx_linkx_timer_count_reg.s.count =
84 (1600ull * clock_mhz) >> 10;
85 }
86 cvmx_write_csr(CVMX_PCSX_LINKX_TIMER_COUNT_REG(index, interface),
87 pcsx_linkx_timer_count_reg.u64);
88
89 /*
90 * Write the advertisement register to be used as the
91 * tx_Config_Reg<D15:D0> of the autonegotiation. In
92 * 1000BASE-X mode, tx_Config_Reg<D15:D0> is PCS*_AN*_ADV_REG.
93 * In SGMII PHY mode, tx_Config_Reg<D15:D0> is
94 * PCS*_SGM*_AN_ADV_REG. In SGMII MAC mode,
95 * tx_Config_Reg<D15:D0> is the fixed value 0x4001, so this
96 * step can be skipped.
97 */
98 if (pcs_misc_ctl_reg.s.mode) {
99 /* 1000BASE-X */
100 union cvmx_pcsx_anx_adv_reg pcsx_anx_adv_reg;
101 pcsx_anx_adv_reg.u64 =
102 cvmx_read_csr(CVMX_PCSX_ANX_ADV_REG(index, interface));
103 pcsx_anx_adv_reg.s.rem_flt = 0;
104 pcsx_anx_adv_reg.s.pause = 3;
105 pcsx_anx_adv_reg.s.hfd = 1;
106 pcsx_anx_adv_reg.s.fd = 1;
107 cvmx_write_csr(CVMX_PCSX_ANX_ADV_REG(index, interface),
108 pcsx_anx_adv_reg.u64);
109 } else {
110 union cvmx_pcsx_miscx_ctl_reg pcsx_miscx_ctl_reg;
111 pcsx_miscx_ctl_reg.u64 =
112 cvmx_read_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface));
113 if (pcsx_miscx_ctl_reg.s.mac_phy) {
114 /* PHY Mode */
115 union cvmx_pcsx_sgmx_an_adv_reg pcsx_sgmx_an_adv_reg;
116 pcsx_sgmx_an_adv_reg.u64 =
117 cvmx_read_csr(CVMX_PCSX_SGMX_AN_ADV_REG
118 (index, interface));
119 pcsx_sgmx_an_adv_reg.s.link = 1;
120 pcsx_sgmx_an_adv_reg.s.dup = 1;
121 pcsx_sgmx_an_adv_reg.s.speed = 2;
122 cvmx_write_csr(CVMX_PCSX_SGMX_AN_ADV_REG
123 (index, interface),
124 pcsx_sgmx_an_adv_reg.u64);
125 } else {
126 /* MAC Mode - Nothing to do */
127 }
128 }
129 return 0;
130 }
131
132 /**
133 * Initialize the SERTES link for the first time or after a loss
134 * of link.
135 *
136 * @interface: Interface to init
137 * @index: Index of prot on the interface
138 *
139 * Returns Zero on success, negative on failure
140 */
__cvmx_helper_sgmii_hardware_init_link(int interface,int index)141 static int __cvmx_helper_sgmii_hardware_init_link(int interface, int index)
142 {
143 union cvmx_pcsx_mrx_control_reg control_reg;
144
145 /*
146 * Take PCS through a reset sequence.
147 * PCS*_MR*_CONTROL_REG[PWR_DN] should be cleared to zero.
148 * Write PCS*_MR*_CONTROL_REG[RESET]=1 (while not changing the
149 * value of the other PCS*_MR*_CONTROL_REG bits). Read
150 * PCS*_MR*_CONTROL_REG[RESET] until it changes value to
151 * zero.
152 */
153 control_reg.u64 =
154 cvmx_read_csr(CVMX_PCSX_MRX_CONTROL_REG(index, interface));
155 if (cvmx_sysinfo_get()->board_type != CVMX_BOARD_TYPE_SIM) {
156 control_reg.s.reset = 1;
157 cvmx_write_csr(CVMX_PCSX_MRX_CONTROL_REG(index, interface),
158 control_reg.u64);
159 if (CVMX_WAIT_FOR_FIELD64
160 (CVMX_PCSX_MRX_CONTROL_REG(index, interface),
161 union cvmx_pcsx_mrx_control_reg, reset, ==, 0, 10000)) {
162 cvmx_dprintf("SGMII%d: Timeout waiting for port %d "
163 "to finish reset\n",
164 interface, index);
165 return -1;
166 }
167 }
168
169 /*
170 * Write PCS*_MR*_CONTROL_REG[RST_AN]=1 to ensure a fresh
171 * sgmii negotiation starts.
172 */
173 control_reg.s.rst_an = 1;
174 control_reg.s.an_en = 1;
175 control_reg.s.pwr_dn = 0;
176 cvmx_write_csr(CVMX_PCSX_MRX_CONTROL_REG(index, interface),
177 control_reg.u64);
178
179 /*
180 * Wait for PCS*_MR*_STATUS_REG[AN_CPT] to be set, indicating
181 * that sgmii autonegotiation is complete. In MAC mode this
182 * isn't an ethernet link, but a link between Octeon and the
183 * PHY.
184 */
185 if ((cvmx_sysinfo_get()->board_type != CVMX_BOARD_TYPE_SIM) &&
186 CVMX_WAIT_FOR_FIELD64(CVMX_PCSX_MRX_STATUS_REG(index, interface),
187 union cvmx_pcsx_mrx_status_reg, an_cpt, ==, 1,
188 10000)) {
189 /* cvmx_dprintf("SGMII%d: Port %d link timeout\n", interface, index); */
190 return -1;
191 }
192 return 0;
193 }
194
195 /**
196 * Configure an SGMII link to the specified speed after the SERTES
197 * link is up.
198 *
199 * @interface: Interface to init
200 * @index: Index of prot on the interface
201 * @link_info: Link state to configure
202 *
203 * Returns Zero on success, negative on failure
204 */
__cvmx_helper_sgmii_hardware_init_link_speed(int interface,int index,cvmx_helper_link_info_t link_info)205 static int __cvmx_helper_sgmii_hardware_init_link_speed(int interface,
206 int index,
207 cvmx_helper_link_info_t
208 link_info)
209 {
210 int is_enabled;
211 union cvmx_gmxx_prtx_cfg gmxx_prtx_cfg;
212 union cvmx_pcsx_miscx_ctl_reg pcsx_miscx_ctl_reg;
213
214 /* Disable GMX before we make any changes. Remember the enable state */
215 gmxx_prtx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
216 is_enabled = gmxx_prtx_cfg.s.en;
217 gmxx_prtx_cfg.s.en = 0;
218 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmxx_prtx_cfg.u64);
219
220 /* Wait for GMX to be idle */
221 if (CVMX_WAIT_FOR_FIELD64
222 (CVMX_GMXX_PRTX_CFG(index, interface), union cvmx_gmxx_prtx_cfg,
223 rx_idle, ==, 1, 10000)
224 || CVMX_WAIT_FOR_FIELD64(CVMX_GMXX_PRTX_CFG(index, interface),
225 union cvmx_gmxx_prtx_cfg, tx_idle, ==, 1,
226 10000)) {
227 cvmx_dprintf
228 ("SGMII%d: Timeout waiting for port %d to be idle\n",
229 interface, index);
230 return -1;
231 }
232
233 /* Read GMX CFG again to make sure the disable completed */
234 gmxx_prtx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
235
236 /*
237 * Get the misc control for PCS. We will need to set the
238 * duplication amount.
239 */
240 pcsx_miscx_ctl_reg.u64 =
241 cvmx_read_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface));
242
243 /*
244 * Use GMXENO to force the link down if the status we get says
245 * it should be down.
246 */
247 pcsx_miscx_ctl_reg.s.gmxeno = !link_info.s.link_up;
248
249 /* Only change the duplex setting if the link is up */
250 if (link_info.s.link_up)
251 gmxx_prtx_cfg.s.duplex = link_info.s.full_duplex;
252
253 /* Do speed based setting for GMX */
254 switch (link_info.s.speed) {
255 case 10:
256 gmxx_prtx_cfg.s.speed = 0;
257 gmxx_prtx_cfg.s.speed_msb = 1;
258 gmxx_prtx_cfg.s.slottime = 0;
259 /* Setting from GMX-603 */
260 pcsx_miscx_ctl_reg.s.samp_pt = 25;
261 cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 64);
262 cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 0);
263 break;
264 case 100:
265 gmxx_prtx_cfg.s.speed = 0;
266 gmxx_prtx_cfg.s.speed_msb = 0;
267 gmxx_prtx_cfg.s.slottime = 0;
268 pcsx_miscx_ctl_reg.s.samp_pt = 0x5;
269 cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 64);
270 cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 0);
271 break;
272 case 1000:
273 gmxx_prtx_cfg.s.speed = 1;
274 gmxx_prtx_cfg.s.speed_msb = 0;
275 gmxx_prtx_cfg.s.slottime = 1;
276 pcsx_miscx_ctl_reg.s.samp_pt = 1;
277 cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 512);
278 cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 8192);
279 break;
280 default:
281 break;
282 }
283
284 /* Write the new misc control for PCS */
285 cvmx_write_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface),
286 pcsx_miscx_ctl_reg.u64);
287
288 /* Write the new GMX settings with the port still disabled */
289 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmxx_prtx_cfg.u64);
290
291 /* Read GMX CFG again to make sure the config completed */
292 gmxx_prtx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
293
294 /* Restore the enabled / disabled state */
295 gmxx_prtx_cfg.s.en = is_enabled;
296 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmxx_prtx_cfg.u64);
297
298 return 0;
299 }
300
301 /**
302 * Bring up the SGMII interface to be ready for packet I/O but
303 * leave I/O disabled using the GMX override. This function
304 * follows the bringup documented in 10.6.3 of the manual.
305 *
306 * @interface: Interface to bringup
307 * @num_ports: Number of ports on the interface
308 *
309 * Returns Zero on success, negative on failure
310 */
__cvmx_helper_sgmii_hardware_init(int interface,int num_ports)311 static int __cvmx_helper_sgmii_hardware_init(int interface, int num_ports)
312 {
313 int index;
314
315 __cvmx_helper_setup_gmx(interface, num_ports);
316
317 for (index = 0; index < num_ports; index++) {
318 int ipd_port = cvmx_helper_get_ipd_port(interface, index);
319 __cvmx_helper_sgmii_hardware_init_one_time(interface, index);
320 __cvmx_helper_sgmii_link_set(ipd_port,
321 __cvmx_helper_sgmii_link_get
322 (ipd_port));
323
324 }
325
326 return 0;
327 }
328
329 /**
330 * Probe a SGMII interface and determine the number of ports
331 * connected to it. The SGMII interface should still be down after
332 * this call.
333 *
334 * @interface: Interface to probe
335 *
336 * Returns Number of ports on the interface. Zero to disable.
337 */
__cvmx_helper_sgmii_probe(int interface)338 int __cvmx_helper_sgmii_probe(int interface)
339 {
340 union cvmx_gmxx_inf_mode mode;
341
342 /*
343 * Due to errata GMX-700 on CN56XXp1.x and CN52XXp1.x, the
344 * interface needs to be enabled before IPD otherwise per port
345 * backpressure may not work properly
346 */
347 mode.u64 = cvmx_read_csr(CVMX_GMXX_INF_MODE(interface));
348 mode.s.en = 1;
349 cvmx_write_csr(CVMX_GMXX_INF_MODE(interface), mode.u64);
350 return 4;
351 }
352
353 /**
354 * Bringup and enable a SGMII interface. After this call packet
355 * I/O should be fully functional. This is called with IPD
356 * enabled but PKO disabled.
357 *
358 * @interface: Interface to bring up
359 *
360 * Returns Zero on success, negative on failure
361 */
__cvmx_helper_sgmii_enable(int interface)362 int __cvmx_helper_sgmii_enable(int interface)
363 {
364 int num_ports = cvmx_helper_ports_on_interface(interface);
365 int index;
366
367 __cvmx_helper_sgmii_hardware_init(interface, num_ports);
368
369 for (index = 0; index < num_ports; index++) {
370 union cvmx_gmxx_prtx_cfg gmxx_prtx_cfg;
371 gmxx_prtx_cfg.u64 =
372 cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
373 gmxx_prtx_cfg.s.en = 1;
374 cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface),
375 gmxx_prtx_cfg.u64);
376 __cvmx_interrupt_pcsx_intx_en_reg_enable(index, interface);
377 }
378 __cvmx_interrupt_pcsxx_int_en_reg_enable(interface);
379 __cvmx_interrupt_gmxx_enable(interface);
380 return 0;
381 }
382
383 /**
384 * Return the link state of an IPD/PKO port as returned by
385 * auto negotiation. The result of this function may not match
386 * Octeon's link config if auto negotiation has changed since
387 * the last call to cvmx_helper_link_set().
388 *
389 * @ipd_port: IPD/PKO port to query
390 *
391 * Returns Link state
392 */
__cvmx_helper_sgmii_link_get(int ipd_port)393 cvmx_helper_link_info_t __cvmx_helper_sgmii_link_get(int ipd_port)
394 {
395 cvmx_helper_link_info_t result;
396 union cvmx_pcsx_miscx_ctl_reg pcs_misc_ctl_reg;
397 int interface = cvmx_helper_get_interface_num(ipd_port);
398 int index = cvmx_helper_get_interface_index_num(ipd_port);
399 union cvmx_pcsx_mrx_control_reg pcsx_mrx_control_reg;
400
401 result.u64 = 0;
402
403 if (cvmx_sysinfo_get()->board_type == CVMX_BOARD_TYPE_SIM) {
404 /* The simulator gives you a simulated 1Gbps full duplex link */
405 result.s.link_up = 1;
406 result.s.full_duplex = 1;
407 result.s.speed = 1000;
408 return result;
409 }
410
411 pcsx_mrx_control_reg.u64 =
412 cvmx_read_csr(CVMX_PCSX_MRX_CONTROL_REG(index, interface));
413 if (pcsx_mrx_control_reg.s.loopbck1) {
414 /* Force 1Gbps full duplex link for internal loopback */
415 result.s.link_up = 1;
416 result.s.full_duplex = 1;
417 result.s.speed = 1000;
418 return result;
419 }
420
421 pcs_misc_ctl_reg.u64 =
422 cvmx_read_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface));
423 if (pcs_misc_ctl_reg.s.mode) {
424 /* 1000BASE-X */
425 /* FIXME */
426 } else {
427 union cvmx_pcsx_miscx_ctl_reg pcsx_miscx_ctl_reg;
428 pcsx_miscx_ctl_reg.u64 =
429 cvmx_read_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface));
430 if (pcsx_miscx_ctl_reg.s.mac_phy) {
431 /* PHY Mode */
432 union cvmx_pcsx_mrx_status_reg pcsx_mrx_status_reg;
433 union cvmx_pcsx_anx_results_reg pcsx_anx_results_reg;
434
435 /*
436 * Don't bother continuing if the SERTES low
437 * level link is down
438 */
439 pcsx_mrx_status_reg.u64 =
440 cvmx_read_csr(CVMX_PCSX_MRX_STATUS_REG
441 (index, interface));
442 if (pcsx_mrx_status_reg.s.lnk_st == 0) {
443 if (__cvmx_helper_sgmii_hardware_init_link
444 (interface, index) != 0)
445 return result;
446 }
447
448 /* Read the autoneg results */
449 pcsx_anx_results_reg.u64 =
450 cvmx_read_csr(CVMX_PCSX_ANX_RESULTS_REG
451 (index, interface));
452 if (pcsx_anx_results_reg.s.an_cpt) {
453 /*
454 * Auto negotiation is complete. Set
455 * status accordingly.
456 */
457 result.s.full_duplex =
458 pcsx_anx_results_reg.s.dup;
459 result.s.link_up =
460 pcsx_anx_results_reg.s.link_ok;
461 switch (pcsx_anx_results_reg.s.spd) {
462 case 0:
463 result.s.speed = 10;
464 break;
465 case 1:
466 result.s.speed = 100;
467 break;
468 case 2:
469 result.s.speed = 1000;
470 break;
471 default:
472 result.s.speed = 0;
473 result.s.link_up = 0;
474 break;
475 }
476 } else {
477 /*
478 * Auto negotiation isn't
479 * complete. Return link down.
480 */
481 result.s.speed = 0;
482 result.s.link_up = 0;
483 }
484 } else { /* MAC Mode */
485
486 result = __cvmx_helper_board_link_get(ipd_port);
487 }
488 }
489 return result;
490 }
491
492 /**
493 * Configure an IPD/PKO port for the specified link state. This
494 * function does not influence auto negotiation at the PHY level.
495 * The passed link state must always match the link state returned
496 * by cvmx_helper_link_get(). It is normally best to use
497 * cvmx_helper_link_autoconf() instead.
498 *
499 * @ipd_port: IPD/PKO port to configure
500 * @link_info: The new link state
501 *
502 * Returns Zero on success, negative on failure
503 */
__cvmx_helper_sgmii_link_set(int ipd_port,cvmx_helper_link_info_t link_info)504 int __cvmx_helper_sgmii_link_set(int ipd_port,
505 cvmx_helper_link_info_t link_info)
506 {
507 int interface = cvmx_helper_get_interface_num(ipd_port);
508 int index = cvmx_helper_get_interface_index_num(ipd_port);
509 __cvmx_helper_sgmii_hardware_init_link(interface, index);
510 return __cvmx_helper_sgmii_hardware_init_link_speed(interface, index,
511 link_info);
512 }
513
514 /**
515 * Configure a port for internal and/or external loopback. Internal
516 * loopback causes packets sent by the port to be received by
517 * Octeon. External loopback causes packets received from the wire to
518 * sent out again.
519 *
520 * @ipd_port: IPD/PKO port to loopback.
521 * @enable_internal:
522 * Non zero if you want internal loopback
523 * @enable_external:
524 * Non zero if you want external loopback
525 *
526 * Returns Zero on success, negative on failure.
527 */
__cvmx_helper_sgmii_configure_loopback(int ipd_port,int enable_internal,int enable_external)528 int __cvmx_helper_sgmii_configure_loopback(int ipd_port, int enable_internal,
529 int enable_external)
530 {
531 int interface = cvmx_helper_get_interface_num(ipd_port);
532 int index = cvmx_helper_get_interface_index_num(ipd_port);
533 union cvmx_pcsx_mrx_control_reg pcsx_mrx_control_reg;
534 union cvmx_pcsx_miscx_ctl_reg pcsx_miscx_ctl_reg;
535
536 pcsx_mrx_control_reg.u64 =
537 cvmx_read_csr(CVMX_PCSX_MRX_CONTROL_REG(index, interface));
538 pcsx_mrx_control_reg.s.loopbck1 = enable_internal;
539 cvmx_write_csr(CVMX_PCSX_MRX_CONTROL_REG(index, interface),
540 pcsx_mrx_control_reg.u64);
541
542 pcsx_miscx_ctl_reg.u64 =
543 cvmx_read_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface));
544 pcsx_miscx_ctl_reg.s.loopbck2 = enable_external;
545 cvmx_write_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface),
546 pcsx_miscx_ctl_reg.u64);
547
548 __cvmx_helper_sgmii_hardware_init_link(interface, index);
549 return 0;
550 }
551