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Diffstat (limited to 'arch/mips/cavium-octeon/executive/cvmx-helper-rgmii.c')
-rw-r--r-- | arch/mips/cavium-octeon/executive/cvmx-helper-rgmii.c | 526 |
1 files changed, 526 insertions, 0 deletions
diff --git a/arch/mips/cavium-octeon/executive/cvmx-helper-rgmii.c b/arch/mips/cavium-octeon/executive/cvmx-helper-rgmii.c new file mode 100644 index 000000000000..82b21843421c --- /dev/null +++ b/arch/mips/cavium-octeon/executive/cvmx-helper-rgmii.c | |||
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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 RGMII/GMII/MII initialization, configuration, | ||
30 | * and monitoring. | ||
31 | */ | ||
32 | #include <asm/octeon/octeon.h> | ||
33 | |||
34 | #include <asm/octeon/cvmx-config.h> | ||
35 | |||
36 | |||
37 | #include <asm/octeon/cvmx-mdio.h> | ||
38 | #include <asm/octeon/cvmx-pko.h> | ||
39 | #include <asm/octeon/cvmx-helper.h> | ||
40 | #include <asm/octeon/cvmx-helper-board.h> | ||
41 | |||
42 | #include <asm/octeon/cvmx-npi-defs.h> | ||
43 | #include <asm/octeon/cvmx-gmxx-defs.h> | ||
44 | #include <asm/octeon/cvmx-asxx-defs.h> | ||
45 | #include <asm/octeon/cvmx-dbg-defs.h> | ||
46 | |||
47 | void __cvmx_interrupt_gmxx_enable(int interface); | ||
48 | void __cvmx_interrupt_asxx_enable(int block); | ||
49 | |||
50 | /** | ||
51 | * Probe RGMII ports and determine the number present | ||
52 | * | ||
53 | * @interface: Interface to probe | ||
54 | * | ||
55 | * Returns Number of RGMII/GMII/MII ports (0-4). | ||
56 | */ | ||
57 | int __cvmx_helper_rgmii_probe(int interface) | ||
58 | { | ||
59 | int num_ports = 0; | ||
60 | union cvmx_gmxx_inf_mode mode; | ||
61 | mode.u64 = cvmx_read_csr(CVMX_GMXX_INF_MODE(interface)); | ||
62 | |||
63 | if (mode.s.type) { | ||
64 | if (OCTEON_IS_MODEL(OCTEON_CN38XX) | ||
65 | || OCTEON_IS_MODEL(OCTEON_CN58XX)) { | ||
66 | cvmx_dprintf("ERROR: RGMII initialize called in " | ||
67 | "SPI interface\n"); | ||
68 | } else if (OCTEON_IS_MODEL(OCTEON_CN31XX) | ||
69 | || OCTEON_IS_MODEL(OCTEON_CN30XX) | ||
70 | || OCTEON_IS_MODEL(OCTEON_CN50XX)) { | ||
71 | /* | ||
72 | * On these chips "type" says we're in | ||
73 | * GMII/MII mode. This limits us to 2 ports | ||
74 | */ | ||
75 | num_ports = 2; | ||
76 | } else { | ||
77 | cvmx_dprintf("ERROR: Unsupported Octeon model in %s\n", | ||
78 | __func__); | ||
79 | } | ||
80 | } else { | ||
81 | if (OCTEON_IS_MODEL(OCTEON_CN38XX) | ||
82 | || OCTEON_IS_MODEL(OCTEON_CN58XX)) { | ||
83 | num_ports = 4; | ||
84 | } else if (OCTEON_IS_MODEL(OCTEON_CN31XX) | ||
85 | || OCTEON_IS_MODEL(OCTEON_CN30XX) | ||
86 | || OCTEON_IS_MODEL(OCTEON_CN50XX)) { | ||
87 | num_ports = 3; | ||
88 | } else { | ||
89 | cvmx_dprintf("ERROR: Unsupported Octeon model in %s\n", | ||
90 | __func__); | ||
91 | } | ||
92 | } | ||
93 | return num_ports; | ||
94 | } | ||
95 | |||
96 | /** | ||
97 | * Put an RGMII interface in loopback mode. Internal packets sent | ||
98 | * out will be received back again on the same port. Externally | ||
99 | * received packets will echo back out. | ||
100 | * | ||
101 | * @port: IPD port number to loop. | ||
102 | */ | ||
103 | void cvmx_helper_rgmii_internal_loopback(int port) | ||
104 | { | ||
105 | int interface = (port >> 4) & 1; | ||
106 | int index = port & 0xf; | ||
107 | uint64_t tmp; | ||
108 | |||
109 | union cvmx_gmxx_prtx_cfg gmx_cfg; | ||
110 | gmx_cfg.u64 = 0; | ||
111 | gmx_cfg.s.duplex = 1; | ||
112 | gmx_cfg.s.slottime = 1; | ||
113 | gmx_cfg.s.speed = 1; | ||
114 | cvmx_write_csr(CVMX_GMXX_TXX_CLK(index, interface), 1); | ||
115 | cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 0x200); | ||
116 | cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 0x2000); | ||
117 | cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64); | ||
118 | tmp = cvmx_read_csr(CVMX_ASXX_PRT_LOOP(interface)); | ||
119 | cvmx_write_csr(CVMX_ASXX_PRT_LOOP(interface), (1 << index) | tmp); | ||
120 | tmp = cvmx_read_csr(CVMX_ASXX_TX_PRT_EN(interface)); | ||
121 | cvmx_write_csr(CVMX_ASXX_TX_PRT_EN(interface), (1 << index) | tmp); | ||
122 | tmp = cvmx_read_csr(CVMX_ASXX_RX_PRT_EN(interface)); | ||
123 | cvmx_write_csr(CVMX_ASXX_RX_PRT_EN(interface), (1 << index) | tmp); | ||
124 | gmx_cfg.s.en = 1; | ||
125 | cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64); | ||
126 | } | ||
127 | |||
128 | /** | ||
129 | * Workaround ASX setup errata with CN38XX pass1 | ||
130 | * | ||
131 | * @interface: Interface to setup | ||
132 | * @port: Port to setup (0..3) | ||
133 | * @cpu_clock_hz: | ||
134 | * Chip frequency in Hertz | ||
135 | * | ||
136 | * Returns Zero on success, negative on failure | ||
137 | */ | ||
138 | static int __cvmx_helper_errata_asx_pass1(int interface, int port, | ||
139 | int cpu_clock_hz) | ||
140 | { | ||
141 | /* Set hi water mark as per errata GMX-4 */ | ||
142 | if (cpu_clock_hz >= 325000000 && cpu_clock_hz < 375000000) | ||
143 | cvmx_write_csr(CVMX_ASXX_TX_HI_WATERX(port, interface), 12); | ||
144 | else if (cpu_clock_hz >= 375000000 && cpu_clock_hz < 437000000) | ||
145 | cvmx_write_csr(CVMX_ASXX_TX_HI_WATERX(port, interface), 11); | ||
146 | else if (cpu_clock_hz >= 437000000 && cpu_clock_hz < 550000000) | ||
147 | cvmx_write_csr(CVMX_ASXX_TX_HI_WATERX(port, interface), 10); | ||
148 | else if (cpu_clock_hz >= 550000000 && cpu_clock_hz < 687000000) | ||
149 | cvmx_write_csr(CVMX_ASXX_TX_HI_WATERX(port, interface), 9); | ||
150 | else | ||
151 | cvmx_dprintf("Illegal clock frequency (%d). " | ||
152 | "CVMX_ASXX_TX_HI_WATERX not set\n", cpu_clock_hz); | ||
153 | return 0; | ||
154 | } | ||
155 | |||
156 | /** | ||
157 | * Configure all of the ASX, GMX, and PKO regsiters required | ||
158 | * to get RGMII to function on the supplied interface. | ||
159 | * | ||
160 | * @interface: PKO Interface to configure (0 or 1) | ||
161 | * | ||
162 | * Returns Zero on success | ||
163 | */ | ||
164 | int __cvmx_helper_rgmii_enable(int interface) | ||
165 | { | ||
166 | int num_ports = cvmx_helper_ports_on_interface(interface); | ||
167 | int port; | ||
168 | struct cvmx_sysinfo *sys_info_ptr = cvmx_sysinfo_get(); | ||
169 | union cvmx_gmxx_inf_mode mode; | ||
170 | union cvmx_asxx_tx_prt_en asx_tx; | ||
171 | union cvmx_asxx_rx_prt_en asx_rx; | ||
172 | |||
173 | mode.u64 = cvmx_read_csr(CVMX_GMXX_INF_MODE(interface)); | ||
174 | |||
175 | if (mode.s.en == 0) | ||
176 | return -1; | ||
177 | if ((OCTEON_IS_MODEL(OCTEON_CN38XX) || | ||
178 | OCTEON_IS_MODEL(OCTEON_CN58XX)) && mode.s.type == 1) | ||
179 | /* Ignore SPI interfaces */ | ||
180 | return -1; | ||
181 | |||
182 | /* Configure the ASX registers needed to use the RGMII ports */ | ||
183 | asx_tx.u64 = 0; | ||
184 | asx_tx.s.prt_en = cvmx_build_mask(num_ports); | ||
185 | cvmx_write_csr(CVMX_ASXX_TX_PRT_EN(interface), asx_tx.u64); | ||
186 | |||
187 | asx_rx.u64 = 0; | ||
188 | asx_rx.s.prt_en = cvmx_build_mask(num_ports); | ||
189 | cvmx_write_csr(CVMX_ASXX_RX_PRT_EN(interface), asx_rx.u64); | ||
190 | |||
191 | /* Configure the GMX registers needed to use the RGMII ports */ | ||
192 | for (port = 0; port < num_ports; port++) { | ||
193 | /* Setting of CVMX_GMXX_TXX_THRESH has been moved to | ||
194 | __cvmx_helper_setup_gmx() */ | ||
195 | |||
196 | if (cvmx_octeon_is_pass1()) | ||
197 | __cvmx_helper_errata_asx_pass1(interface, port, | ||
198 | sys_info_ptr-> | ||
199 | cpu_clock_hz); | ||
200 | else { | ||
201 | /* | ||
202 | * Configure more flexible RGMII preamble | ||
203 | * checking. Pass 1 doesn't support this | ||
204 | * feature. | ||
205 | */ | ||
206 | union cvmx_gmxx_rxx_frm_ctl frm_ctl; | ||
207 | frm_ctl.u64 = | ||
208 | cvmx_read_csr(CVMX_GMXX_RXX_FRM_CTL | ||
209 | (port, interface)); | ||
210 | /* New field, so must be compile time */ | ||
211 | frm_ctl.s.pre_free = 1; | ||
212 | cvmx_write_csr(CVMX_GMXX_RXX_FRM_CTL(port, interface), | ||
213 | frm_ctl.u64); | ||
214 | } | ||
215 | |||
216 | /* | ||
217 | * Each pause frame transmitted will ask for about 10M | ||
218 | * bit times before resume. If buffer space comes | ||
219 | * available before that time has expired, an XON | ||
220 | * pause frame (0 time) will be transmitted to restart | ||
221 | * the flow. | ||
222 | */ | ||
223 | cvmx_write_csr(CVMX_GMXX_TXX_PAUSE_PKT_TIME(port, interface), | ||
224 | 20000); | ||
225 | cvmx_write_csr(CVMX_GMXX_TXX_PAUSE_PKT_INTERVAL | ||
226 | (port, interface), 19000); | ||
227 | |||
228 | if (OCTEON_IS_MODEL(OCTEON_CN50XX)) { | ||
229 | cvmx_write_csr(CVMX_ASXX_TX_CLK_SETX(port, interface), | ||
230 | 16); | ||
231 | cvmx_write_csr(CVMX_ASXX_RX_CLK_SETX(port, interface), | ||
232 | 16); | ||
233 | } else { | ||
234 | cvmx_write_csr(CVMX_ASXX_TX_CLK_SETX(port, interface), | ||
235 | 24); | ||
236 | cvmx_write_csr(CVMX_ASXX_RX_CLK_SETX(port, interface), | ||
237 | 24); | ||
238 | } | ||
239 | } | ||
240 | |||
241 | __cvmx_helper_setup_gmx(interface, num_ports); | ||
242 | |||
243 | /* enable the ports now */ | ||
244 | for (port = 0; port < num_ports; port++) { | ||
245 | union cvmx_gmxx_prtx_cfg gmx_cfg; | ||
246 | cvmx_helper_link_autoconf(cvmx_helper_get_ipd_port | ||
247 | (interface, port)); | ||
248 | gmx_cfg.u64 = | ||
249 | cvmx_read_csr(CVMX_GMXX_PRTX_CFG(port, interface)); | ||
250 | gmx_cfg.s.en = 1; | ||
251 | cvmx_write_csr(CVMX_GMXX_PRTX_CFG(port, interface), | ||
252 | gmx_cfg.u64); | ||
253 | } | ||
254 | __cvmx_interrupt_asxx_enable(interface); | ||
255 | __cvmx_interrupt_gmxx_enable(interface); | ||
256 | |||
257 | return 0; | ||
258 | } | ||
259 | |||
260 | /** | ||
261 | * Return the link state of an IPD/PKO port as returned by | ||
262 | * auto negotiation. The result of this function may not match | ||
263 | * Octeon's link config if auto negotiation has changed since | ||
264 | * the last call to cvmx_helper_link_set(). | ||
265 | * | ||
266 | * @ipd_port: IPD/PKO port to query | ||
267 | * | ||
268 | * Returns Link state | ||
269 | */ | ||
270 | cvmx_helper_link_info_t __cvmx_helper_rgmii_link_get(int ipd_port) | ||
271 | { | ||
272 | int interface = cvmx_helper_get_interface_num(ipd_port); | ||
273 | int index = cvmx_helper_get_interface_index_num(ipd_port); | ||
274 | union cvmx_asxx_prt_loop asxx_prt_loop; | ||
275 | |||
276 | asxx_prt_loop.u64 = cvmx_read_csr(CVMX_ASXX_PRT_LOOP(interface)); | ||
277 | if (asxx_prt_loop.s.int_loop & (1 << index)) { | ||
278 | /* Force 1Gbps full duplex on internal loopback */ | ||
279 | cvmx_helper_link_info_t result; | ||
280 | result.u64 = 0; | ||
281 | result.s.full_duplex = 1; | ||
282 | result.s.link_up = 1; | ||
283 | result.s.speed = 1000; | ||
284 | return result; | ||
285 | } else | ||
286 | return __cvmx_helper_board_link_get(ipd_port); | ||
287 | } | ||
288 | |||
289 | /** | ||
290 | * Configure an IPD/PKO port for the specified link state. This | ||
291 | * function does not influence auto negotiation at the PHY level. | ||
292 | * The passed link state must always match the link state returned | ||
293 | * by cvmx_helper_link_get(). It is normally best to use | ||
294 | * cvmx_helper_link_autoconf() instead. | ||
295 | * | ||
296 | * @ipd_port: IPD/PKO port to configure | ||
297 | * @link_info: The new link state | ||
298 | * | ||
299 | * Returns Zero on success, negative on failure | ||
300 | */ | ||
301 | int __cvmx_helper_rgmii_link_set(int ipd_port, | ||
302 | cvmx_helper_link_info_t link_info) | ||
303 | { | ||
304 | int result = 0; | ||
305 | int interface = cvmx_helper_get_interface_num(ipd_port); | ||
306 | int index = cvmx_helper_get_interface_index_num(ipd_port); | ||
307 | union cvmx_gmxx_prtx_cfg original_gmx_cfg; | ||
308 | union cvmx_gmxx_prtx_cfg new_gmx_cfg; | ||
309 | union cvmx_pko_mem_queue_qos pko_mem_queue_qos; | ||
310 | union cvmx_pko_mem_queue_qos pko_mem_queue_qos_save[16]; | ||
311 | union cvmx_gmxx_tx_ovr_bp gmx_tx_ovr_bp; | ||
312 | union cvmx_gmxx_tx_ovr_bp gmx_tx_ovr_bp_save; | ||
313 | int i; | ||
314 | |||
315 | /* Ignore speed sets in the simulator */ | ||
316 | if (cvmx_sysinfo_get()->board_type == CVMX_BOARD_TYPE_SIM) | ||
317 | return 0; | ||
318 | |||
319 | /* Read the current settings so we know the current enable state */ | ||
320 | original_gmx_cfg.u64 = | ||
321 | cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface)); | ||
322 | new_gmx_cfg = original_gmx_cfg; | ||
323 | |||
324 | /* Disable the lowest level RX */ | ||
325 | cvmx_write_csr(CVMX_ASXX_RX_PRT_EN(interface), | ||
326 | cvmx_read_csr(CVMX_ASXX_RX_PRT_EN(interface)) & | ||
327 | ~(1 << index)); | ||
328 | |||
329 | memset(pko_mem_queue_qos_save, 0, sizeof(pko_mem_queue_qos_save)); | ||
330 | /* Disable all queues so that TX should become idle */ | ||
331 | for (i = 0; i < cvmx_pko_get_num_queues(ipd_port); i++) { | ||
332 | int queue = cvmx_pko_get_base_queue(ipd_port) + i; | ||
333 | cvmx_write_csr(CVMX_PKO_REG_READ_IDX, queue); | ||
334 | pko_mem_queue_qos.u64 = cvmx_read_csr(CVMX_PKO_MEM_QUEUE_QOS); | ||
335 | pko_mem_queue_qos.s.pid = ipd_port; | ||
336 | pko_mem_queue_qos.s.qid = queue; | ||
337 | pko_mem_queue_qos_save[i] = pko_mem_queue_qos; | ||
338 | pko_mem_queue_qos.s.qos_mask = 0; | ||
339 | cvmx_write_csr(CVMX_PKO_MEM_QUEUE_QOS, pko_mem_queue_qos.u64); | ||
340 | } | ||
341 | |||
342 | /* Disable backpressure */ | ||
343 | gmx_tx_ovr_bp.u64 = cvmx_read_csr(CVMX_GMXX_TX_OVR_BP(interface)); | ||
344 | gmx_tx_ovr_bp_save = gmx_tx_ovr_bp; | ||
345 | gmx_tx_ovr_bp.s.bp &= ~(1 << index); | ||
346 | gmx_tx_ovr_bp.s.en |= 1 << index; | ||
347 | cvmx_write_csr(CVMX_GMXX_TX_OVR_BP(interface), gmx_tx_ovr_bp.u64); | ||
348 | cvmx_read_csr(CVMX_GMXX_TX_OVR_BP(interface)); | ||
349 | |||
350 | /* | ||
351 | * Poll the GMX state machine waiting for it to become | ||
352 | * idle. Preferably we should only change speed when it is | ||
353 | * idle. If it doesn't become idle we will still do the speed | ||
354 | * change, but there is a slight chance that GMX will | ||
355 | * lockup. | ||
356 | */ | ||
357 | cvmx_write_csr(CVMX_NPI_DBG_SELECT, | ||
358 | interface * 0x800 + index * 0x100 + 0x880); | ||
359 | CVMX_WAIT_FOR_FIELD64(CVMX_DBG_DATA, union cvmx_dbg_data, data & 7, | ||
360 | ==, 0, 10000); | ||
361 | CVMX_WAIT_FOR_FIELD64(CVMX_DBG_DATA, union cvmx_dbg_data, data & 0xf, | ||
362 | ==, 0, 10000); | ||
363 | |||
364 | /* Disable the port before we make any changes */ | ||
365 | new_gmx_cfg.s.en = 0; | ||
366 | cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), new_gmx_cfg.u64); | ||
367 | cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface)); | ||
368 | |||
369 | /* Set full/half duplex */ | ||
370 | if (cvmx_octeon_is_pass1()) | ||
371 | /* Half duplex is broken for 38XX Pass 1 */ | ||
372 | new_gmx_cfg.s.duplex = 1; | ||
373 | else if (!link_info.s.link_up) | ||
374 | /* Force full duplex on down links */ | ||
375 | new_gmx_cfg.s.duplex = 1; | ||
376 | else | ||
377 | new_gmx_cfg.s.duplex = link_info.s.full_duplex; | ||
378 | |||
379 | /* Set the link speed. Anything unknown is set to 1Gbps */ | ||
380 | if (link_info.s.speed == 10) { | ||
381 | new_gmx_cfg.s.slottime = 0; | ||
382 | new_gmx_cfg.s.speed = 0; | ||
383 | } else if (link_info.s.speed == 100) { | ||
384 | new_gmx_cfg.s.slottime = 0; | ||
385 | new_gmx_cfg.s.speed = 0; | ||
386 | } else { | ||
387 | new_gmx_cfg.s.slottime = 1; | ||
388 | new_gmx_cfg.s.speed = 1; | ||
389 | } | ||
390 | |||
391 | /* Adjust the clocks */ | ||
392 | if (link_info.s.speed == 10) { | ||
393 | cvmx_write_csr(CVMX_GMXX_TXX_CLK(index, interface), 50); | ||
394 | cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 0x40); | ||
395 | cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 0); | ||
396 | } else if (link_info.s.speed == 100) { | ||
397 | cvmx_write_csr(CVMX_GMXX_TXX_CLK(index, interface), 5); | ||
398 | cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 0x40); | ||
399 | cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 0); | ||
400 | } else { | ||
401 | cvmx_write_csr(CVMX_GMXX_TXX_CLK(index, interface), 1); | ||
402 | cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 0x200); | ||
403 | cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 0x2000); | ||
404 | } | ||
405 | |||
406 | if (OCTEON_IS_MODEL(OCTEON_CN30XX) || OCTEON_IS_MODEL(OCTEON_CN50XX)) { | ||
407 | if ((link_info.s.speed == 10) || (link_info.s.speed == 100)) { | ||
408 | union cvmx_gmxx_inf_mode mode; | ||
409 | mode.u64 = cvmx_read_csr(CVMX_GMXX_INF_MODE(interface)); | ||
410 | |||
411 | /* | ||
412 | * Port .en .type .p0mii Configuration | ||
413 | * ---- --- ----- ------ ----------------------------------------- | ||
414 | * X 0 X X All links are disabled. | ||
415 | * 0 1 X 0 Port 0 is RGMII | ||
416 | * 0 1 X 1 Port 0 is MII | ||
417 | * 1 1 0 X Ports 1 and 2 are configured as RGMII ports. | ||
418 | * 1 1 1 X Port 1: GMII/MII; Port 2: disabled. GMII or | ||
419 | * MII port is selected by GMX_PRT1_CFG[SPEED]. | ||
420 | */ | ||
421 | |||
422 | /* In MII mode, CLK_CNT = 1. */ | ||
423 | if (((index == 0) && (mode.s.p0mii == 1)) | ||
424 | || ((index != 0) && (mode.s.type == 1))) { | ||
425 | cvmx_write_csr(CVMX_GMXX_TXX_CLK | ||
426 | (index, interface), 1); | ||
427 | } | ||
428 | } | ||
429 | } | ||
430 | |||
431 | /* Do a read to make sure all setup stuff is complete */ | ||
432 | cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface)); | ||
433 | |||
434 | /* Save the new GMX setting without enabling the port */ | ||
435 | cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), new_gmx_cfg.u64); | ||
436 | |||
437 | /* Enable the lowest level RX */ | ||
438 | cvmx_write_csr(CVMX_ASXX_RX_PRT_EN(interface), | ||
439 | cvmx_read_csr(CVMX_ASXX_RX_PRT_EN(interface)) | (1 << | ||
440 | index)); | ||
441 | |||
442 | /* Re-enable the TX path */ | ||
443 | for (i = 0; i < cvmx_pko_get_num_queues(ipd_port); i++) { | ||
444 | int queue = cvmx_pko_get_base_queue(ipd_port) + i; | ||
445 | cvmx_write_csr(CVMX_PKO_REG_READ_IDX, queue); | ||
446 | cvmx_write_csr(CVMX_PKO_MEM_QUEUE_QOS, | ||
447 | pko_mem_queue_qos_save[i].u64); | ||
448 | } | ||
449 | |||
450 | /* Restore backpressure */ | ||
451 | cvmx_write_csr(CVMX_GMXX_TX_OVR_BP(interface), gmx_tx_ovr_bp_save.u64); | ||
452 | |||
453 | /* Restore the GMX enable state. Port config is complete */ | ||
454 | new_gmx_cfg.s.en = original_gmx_cfg.s.en; | ||
455 | cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), new_gmx_cfg.u64); | ||
456 | |||
457 | return result; | ||
458 | } | ||
459 | |||
460 | /** | ||
461 | * Configure a port for internal and/or external loopback. Internal loopback | ||
462 | * causes packets sent by the port to be received by Octeon. External loopback | ||
463 | * causes packets received from the wire to sent out again. | ||
464 | * | ||
465 | * @ipd_port: IPD/PKO port to loopback. | ||
466 | * @enable_internal: | ||
467 | * Non zero if you want internal loopback | ||
468 | * @enable_external: | ||
469 | * Non zero if you want external loopback | ||
470 | * | ||
471 | * Returns Zero on success, negative on failure. | ||
472 | */ | ||
473 | int __cvmx_helper_rgmii_configure_loopback(int ipd_port, int enable_internal, | ||
474 | int enable_external) | ||
475 | { | ||
476 | int interface = cvmx_helper_get_interface_num(ipd_port); | ||
477 | int index = cvmx_helper_get_interface_index_num(ipd_port); | ||
478 | int original_enable; | ||
479 | union cvmx_gmxx_prtx_cfg gmx_cfg; | ||
480 | union cvmx_asxx_prt_loop asxx_prt_loop; | ||
481 | |||
482 | /* Read the current enable state and save it */ | ||
483 | gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface)); | ||
484 | original_enable = gmx_cfg.s.en; | ||
485 | /* Force port to be disabled */ | ||
486 | gmx_cfg.s.en = 0; | ||
487 | if (enable_internal) { | ||
488 | /* Force speed if we're doing internal loopback */ | ||
489 | gmx_cfg.s.duplex = 1; | ||
490 | gmx_cfg.s.slottime = 1; | ||
491 | gmx_cfg.s.speed = 1; | ||
492 | cvmx_write_csr(CVMX_GMXX_TXX_CLK(index, interface), 1); | ||
493 | cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 0x200); | ||
494 | cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 0x2000); | ||
495 | } | ||
496 | cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64); | ||
497 | |||
498 | /* Set the loopback bits */ | ||
499 | asxx_prt_loop.u64 = cvmx_read_csr(CVMX_ASXX_PRT_LOOP(interface)); | ||
500 | if (enable_internal) | ||
501 | asxx_prt_loop.s.int_loop |= 1 << index; | ||
502 | else | ||
503 | asxx_prt_loop.s.int_loop &= ~(1 << index); | ||
504 | if (enable_external) | ||
505 | asxx_prt_loop.s.ext_loop |= 1 << index; | ||
506 | else | ||
507 | asxx_prt_loop.s.ext_loop &= ~(1 << index); | ||
508 | cvmx_write_csr(CVMX_ASXX_PRT_LOOP(interface), asxx_prt_loop.u64); | ||
509 | |||
510 | /* Force enables in internal loopback */ | ||
511 | if (enable_internal) { | ||
512 | uint64_t tmp; | ||
513 | tmp = cvmx_read_csr(CVMX_ASXX_TX_PRT_EN(interface)); | ||
514 | cvmx_write_csr(CVMX_ASXX_TX_PRT_EN(interface), | ||
515 | (1 << index) | tmp); | ||
516 | tmp = cvmx_read_csr(CVMX_ASXX_RX_PRT_EN(interface)); | ||
517 | cvmx_write_csr(CVMX_ASXX_RX_PRT_EN(interface), | ||
518 | (1 << index) | tmp); | ||
519 | original_enable = 1; | ||
520 | } | ||
521 | |||
522 | /* Restore the enable state */ | ||
523 | gmx_cfg.s.en = original_enable; | ||
524 | cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64); | ||
525 | return 0; | ||
526 | } | ||