Commit | Line | Data |
---|---|---|
ea24652d IPG |
1 | /* |
2 | * Intel Wireless WiMax Connection 2400m | |
3 | * Host-Device protocol interface definitions | |
4 | * | |
5 | * | |
6 | * Copyright (C) 2007-2008 Intel Corporation. All rights reserved. | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * * Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * * Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in | |
16 | * the documentation and/or other materials provided with the | |
17 | * distribution. | |
18 | * * Neither the name of Intel Corporation nor the names of its | |
19 | * contributors may be used to endorse or promote products derived | |
20 | * from this software without specific prior written permission. | |
21 | * | |
22 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
23 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
24 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
25 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
26 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
27 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
28 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
29 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
30 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
31 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
32 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
33 | * | |
34 | * | |
35 | * Intel Corporation <linux-wimax@intel.com> | |
36 | * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> | |
37 | * - Initial implementation | |
38 | * | |
39 | * | |
40 | * This header defines the data structures and constants used to | |
41 | * communicate with the device. | |
42 | * | |
43 | * BOOTMODE/BOOTROM/FIRMWARE UPLOAD PROTOCOL | |
44 | * | |
45 | * The firmware upload protocol is quite simple and only requires a | |
46 | * handful of commands. See drivers/net/wimax/i2400m/fw.c for more | |
47 | * details. | |
48 | * | |
49 | * The BCF data structure is for the firmware file header. | |
50 | * | |
51 | * | |
52 | * THE DATA / CONTROL PROTOCOL | |
53 | * | |
54 | * This is the normal protocol spoken with the device once the | |
55 | * firmware is uploaded. It transports data payloads and control | |
56 | * messages back and forth. | |
57 | * | |
58 | * It consists 'messages' that pack one or more payloads each. The | |
59 | * format is described in detail in drivers/net/wimax/i2400m/rx.c and | |
60 | * tx.c. | |
61 | * | |
62 | * | |
63 | * THE L3L4 PROTOCOL | |
64 | * | |
65 | * The term L3L4 refers to Layer 3 (the device), Layer 4 (the | |
66 | * driver/host software). | |
67 | * | |
68 | * This is the control protocol used by the host to control the i2400m | |
69 | * device (scan, connect, disconnect...). This is sent to / received | |
70 | * as control frames. These frames consist of a header and zero or | |
71 | * more TLVs with information. We call each control frame a "message". | |
72 | * | |
73 | * Each message is composed of: | |
74 | * | |
75 | * HEADER | |
76 | * [TLV0 + PAYLOAD0] | |
77 | * [TLV1 + PAYLOAD1] | |
78 | * [...] | |
79 | * [TLVN + PAYLOADN] | |
80 | * | |
81 | * The HEADER is defined by 'struct i2400m_l3l4_hdr'. The payloads are | |
82 | * defined by a TLV structure (Type Length Value) which is a 'header' | |
83 | * (struct i2400m_tlv_hdr) and then the payload. | |
84 | * | |
85 | * All integers are represented as Little Endian. | |
86 | * | |
87 | * - REQUESTS AND EVENTS | |
88 | * | |
89 | * The requests can be clasified as follows: | |
90 | * | |
91 | * COMMAND: implies a request from the host to the device requesting | |
92 | * an action being performed. The device will reply with a | |
93 | * message (with the same type as the command), status and | |
94 | * no (TLV) payload. Execution of a command might cause | |
95 | * events (of different type) to be sent later on as | |
96 | * device's state changes. | |
97 | * | |
98 | * GET/SET: similar to COMMAND, but will not cause other | |
99 | * EVENTs. The reply, in the case of GET, will contain | |
100 | * TLVs with the requested information. | |
101 | * | |
102 | * EVENT: asynchronous messages sent from the device, maybe as a | |
103 | * consequence of previous COMMANDs but disassociated from | |
104 | * them. | |
105 | * | |
106 | * Only one request might be pending at the same time (ie: don't | |
107 | * parallelize nor post another GET request before the previous | |
108 | * COMMAND has been acknowledged with it's corresponding reply by the | |
109 | * device). | |
110 | * | |
111 | * The different requests and their formats are described below: | |
112 | * | |
113 | * I2400M_MT_* Message types | |
114 | * I2400M_MS_* Message status (for replies, events) | |
115 | * i2400m_tlv_* TLVs | |
116 | * | |
117 | * data types are named 'struct i2400m_msg_OPNAME', OPNAME matching the | |
118 | * operation. | |
119 | */ | |
120 | ||
121 | #ifndef __LINUX__WIMAX__I2400M_H__ | |
122 | #define __LINUX__WIMAX__I2400M_H__ | |
123 | ||
124 | #include <linux/types.h> | |
125 | ||
126 | ||
127 | /* | |
128 | * Host Device Interface (HDI) common to all busses | |
129 | */ | |
130 | ||
131 | /* Boot-mode (firmware upload mode) commands */ | |
132 | ||
133 | /* Header for the firmware file */ | |
134 | struct i2400m_bcf_hdr { | |
135 | __le32 module_type; | |
136 | __le32 header_len; | |
137 | __le32 header_version; | |
138 | __le32 module_id; | |
139 | __le32 module_vendor; | |
140 | __le32 date; /* BCD YYYMMDD */ | |
141 | __le32 size; | |
142 | __le32 key_size; /* in dwords */ | |
143 | __le32 modulus_size; /* in dwords */ | |
144 | __le32 exponent_size; /* in dwords */ | |
145 | __u8 reserved[88]; | |
146 | } __attribute__ ((packed)); | |
147 | ||
148 | /* Boot mode opcodes */ | |
149 | enum i2400m_brh_opcode { | |
150 | I2400M_BRH_READ = 1, | |
151 | I2400M_BRH_WRITE = 2, | |
152 | I2400M_BRH_JUMP = 3, | |
153 | I2400M_BRH_SIGNED_JUMP = 8, | |
154 | I2400M_BRH_HASH_PAYLOAD_ONLY = 9, | |
155 | }; | |
156 | ||
157 | /* Boot mode command masks and stuff */ | |
158 | enum i2400m_brh { | |
159 | I2400M_BRH_SIGNATURE = 0xcbbc0000, | |
160 | I2400M_BRH_SIGNATURE_MASK = 0xffff0000, | |
161 | I2400M_BRH_SIGNATURE_SHIFT = 16, | |
162 | I2400M_BRH_OPCODE_MASK = 0x0000000f, | |
163 | I2400M_BRH_RESPONSE_MASK = 0x000000f0, | |
164 | I2400M_BRH_RESPONSE_SHIFT = 4, | |
165 | I2400M_BRH_DIRECT_ACCESS = 0x00000400, | |
166 | I2400M_BRH_RESPONSE_REQUIRED = 0x00000200, | |
167 | I2400M_BRH_USE_CHECKSUM = 0x00000100, | |
168 | }; | |
169 | ||
170 | ||
171 | /* Constants for bcf->module_id */ | |
172 | enum i2400m_bcf_mod_id { | |
173 | /* Firmware file carries its own pokes -- pokes are a set of | |
174 | * magical values that have to be written in certain memory | |
175 | * addresses to get the device up and ready for firmware | |
176 | * download when it is in non-signed boot mode. */ | |
177 | I2400M_BCF_MOD_ID_POKES = 0x000000001, | |
178 | }; | |
179 | ||
180 | ||
181 | /** | |
182 | * i2400m_bootrom_header - Header for a boot-mode command | |
183 | * | |
184 | * @cmd: the above command descriptor | |
185 | * @target_addr: where on the device memory should the action be performed. | |
186 | * @data_size: for read/write, amount of data to be read/written | |
187 | * @block_checksum: checksum value (if applicable) | |
188 | * @payload: the beginning of data attached to this header | |
189 | */ | |
190 | struct i2400m_bootrom_header { | |
191 | __le32 command; /* Compose with enum i2400_brh */ | |
192 | __le32 target_addr; | |
193 | __le32 data_size; | |
194 | __le32 block_checksum; | |
195 | char payload[0]; | |
196 | } __attribute__ ((packed)); | |
197 | ||
198 | ||
199 | /* | |
200 | * Data / control protocol | |
201 | */ | |
202 | ||
203 | /* Packet types for the host-device interface */ | |
204 | enum i2400m_pt { | |
205 | I2400M_PT_DATA = 0, | |
206 | I2400M_PT_CTRL, | |
207 | I2400M_PT_TRACE, /* For device debug */ | |
208 | I2400M_PT_RESET_WARM, /* device reset */ | |
209 | I2400M_PT_RESET_COLD, /* USB[transport] reset, like reconnect */ | |
210 | I2400M_PT_ILLEGAL | |
211 | }; | |
212 | ||
213 | ||
214 | /* | |
215 | * Payload for a data packet | |
216 | * | |
217 | * This is prefixed to each and every outgoing DATA type. | |
218 | */ | |
219 | struct i2400m_pl_data_hdr { | |
220 | __le32 reserved; | |
221 | } __attribute__((packed)); | |
222 | ||
223 | ||
224 | /* Misc constants */ | |
225 | enum { | |
226 | I2400M_PL_PAD = 16, /* Payload data size alignment */ | |
227 | I2400M_PL_SIZE_MAX = 0x3EFF, | |
228 | I2400M_MAX_PLS_IN_MSG = 60, | |
229 | /* protocol barkers: sync sequences; for notifications they | |
230 | * are sent in groups of four. */ | |
231 | I2400M_H2D_PREVIEW_BARKER = 0xcafe900d, | |
232 | I2400M_COLD_RESET_BARKER = 0xc01dc01d, | |
233 | I2400M_WARM_RESET_BARKER = 0x50f750f7, | |
234 | I2400M_NBOOT_BARKER = 0xdeadbeef, | |
235 | I2400M_SBOOT_BARKER = 0x0ff1c1a1, | |
236 | I2400M_ACK_BARKER = 0xfeedbabe, | |
237 | I2400M_D2H_MSG_BARKER = 0xbeefbabe, | |
238 | }; | |
239 | ||
240 | ||
241 | /* | |
242 | * Hardware payload descriptor | |
243 | * | |
244 | * Bitfields encoded in a struct to enforce typing semantics. | |
245 | * | |
246 | * Look in rx.c and tx.c for a full description of the format. | |
247 | */ | |
248 | struct i2400m_pld { | |
249 | __le32 val; | |
250 | } __attribute__ ((packed)); | |
251 | ||
252 | #define I2400M_PLD_SIZE_MASK 0x00003fff | |
253 | #define I2400M_PLD_TYPE_SHIFT 16 | |
254 | #define I2400M_PLD_TYPE_MASK 0x000f0000 | |
255 | ||
256 | /* | |
257 | * Header for a TX message or RX message | |
258 | * | |
259 | * @barker: preamble | |
260 | * @size: used for management of the FIFO queue buffer; before | |
261 | * sending, this is converted to be a real preamble. This | |
262 | * indicates the real size of the TX message that starts at this | |
263 | * point. If the highest bit is set, then this message is to be | |
264 | * skipped. | |
265 | * @sequence: sequence number of this message | |
266 | * @offset: offset where the message itself starts -- see the comments | |
267 | * in the file header about message header and payload descriptor | |
268 | * alignment. | |
269 | * @num_pls: number of payloads in this message | |
270 | * @padding: amount of padding bytes at the end of the message to make | |
271 | * it be of block-size aligned | |
272 | * | |
273 | * Look in rx.c and tx.c for a full description of the format. | |
274 | */ | |
275 | struct i2400m_msg_hdr { | |
276 | union { | |
277 | __le32 barker; | |
278 | __u32 size; /* same size type as barker!! */ | |
279 | }; | |
280 | union { | |
281 | __le32 sequence; | |
282 | __u32 offset; /* same size type as barker!! */ | |
283 | }; | |
284 | __le16 num_pls; | |
285 | __le16 rsv1; | |
286 | __le16 padding; | |
287 | __le16 rsv2; | |
288 | struct i2400m_pld pld[0]; | |
289 | } __attribute__ ((packed)); | |
290 | ||
291 | ||
292 | ||
293 | /* | |
294 | * L3/L4 control protocol | |
295 | */ | |
296 | ||
297 | enum { | |
298 | /* Interface version */ | |
299 | I2400M_L3L4_VERSION = 0x0100, | |
300 | }; | |
301 | ||
302 | /* Message types */ | |
303 | enum i2400m_mt { | |
304 | I2400M_MT_RESERVED = 0x0000, | |
305 | I2400M_MT_INVALID = 0xffff, | |
306 | I2400M_MT_REPORT_MASK = 0x8000, | |
307 | ||
308 | I2400M_MT_GET_SCAN_RESULT = 0x4202, | |
309 | I2400M_MT_SET_SCAN_PARAM = 0x4402, | |
310 | I2400M_MT_CMD_RF_CONTROL = 0x4602, | |
311 | I2400M_MT_CMD_SCAN = 0x4603, | |
312 | I2400M_MT_CMD_CONNECT = 0x4604, | |
313 | I2400M_MT_CMD_DISCONNECT = 0x4605, | |
314 | I2400M_MT_CMD_EXIT_IDLE = 0x4606, | |
315 | I2400M_MT_GET_LM_VERSION = 0x5201, | |
316 | I2400M_MT_GET_DEVICE_INFO = 0x5202, | |
317 | I2400M_MT_GET_LINK_STATUS = 0x5203, | |
318 | I2400M_MT_GET_STATISTICS = 0x5204, | |
319 | I2400M_MT_GET_STATE = 0x5205, | |
320 | I2400M_MT_GET_MEDIA_STATUS = 0x5206, | |
321 | I2400M_MT_SET_INIT_CONFIG = 0x5404, | |
322 | I2400M_MT_CMD_INIT = 0x5601, | |
323 | I2400M_MT_CMD_TERMINATE = 0x5602, | |
324 | I2400M_MT_CMD_MODE_OF_OP = 0x5603, | |
325 | I2400M_MT_CMD_RESET_DEVICE = 0x5604, | |
326 | I2400M_MT_CMD_MONITOR_CONTROL = 0x5605, | |
327 | I2400M_MT_CMD_ENTER_POWERSAVE = 0x5606, | |
328 | I2400M_MT_GET_TLS_OPERATION_RESULT = 0x6201, | |
329 | I2400M_MT_SET_EAP_SUCCESS = 0x6402, | |
330 | I2400M_MT_SET_EAP_FAIL = 0x6403, | |
331 | I2400M_MT_SET_EAP_KEY = 0x6404, | |
332 | I2400M_MT_CMD_SEND_EAP_RESPONSE = 0x6602, | |
333 | I2400M_MT_REPORT_SCAN_RESULT = 0xc002, | |
334 | I2400M_MT_REPORT_STATE = 0xd002, | |
335 | I2400M_MT_REPORT_POWERSAVE_READY = 0xd005, | |
336 | I2400M_MT_REPORT_EAP_REQUEST = 0xe002, | |
337 | I2400M_MT_REPORT_EAP_RESTART = 0xe003, | |
338 | I2400M_MT_REPORT_ALT_ACCEPT = 0xe004, | |
339 | I2400M_MT_REPORT_KEY_REQUEST = 0xe005, | |
340 | }; | |
341 | ||
342 | ||
343 | /* | |
344 | * Message Ack Status codes | |
345 | * | |
346 | * When a message is replied-to, this status is reported. | |
347 | */ | |
348 | enum i2400m_ms { | |
349 | I2400M_MS_DONE_OK = 0, | |
350 | I2400M_MS_DONE_IN_PROGRESS = 1, | |
351 | I2400M_MS_INVALID_OP = 2, | |
352 | I2400M_MS_BAD_STATE = 3, | |
353 | I2400M_MS_ILLEGAL_VALUE = 4, | |
354 | I2400M_MS_MISSING_PARAMS = 5, | |
355 | I2400M_MS_VERSION_ERROR = 6, | |
356 | I2400M_MS_ACCESSIBILITY_ERROR = 7, | |
357 | I2400M_MS_BUSY = 8, | |
358 | I2400M_MS_CORRUPTED_TLV = 9, | |
359 | I2400M_MS_UNINITIALIZED = 10, | |
360 | I2400M_MS_UNKNOWN_ERROR = 11, | |
361 | I2400M_MS_PRODUCTION_ERROR = 12, | |
362 | I2400M_MS_NO_RF = 13, | |
363 | I2400M_MS_NOT_READY_FOR_POWERSAVE = 14, | |
364 | I2400M_MS_THERMAL_CRITICAL = 15, | |
365 | I2400M_MS_MAX | |
366 | }; | |
367 | ||
368 | ||
369 | /** | |
370 | * i2400m_tlv - enumeration of the different types of TLVs | |
371 | * | |
372 | * TLVs stand for type-length-value and are the header for a payload | |
373 | * composed of almost anything. Each payload has a type assigned | |
374 | * and a length. | |
375 | */ | |
376 | enum i2400m_tlv { | |
377 | I2400M_TLV_L4_MESSAGE_VERSIONS = 129, | |
378 | I2400M_TLV_SYSTEM_STATE = 141, | |
379 | I2400M_TLV_MEDIA_STATUS = 161, | |
380 | I2400M_TLV_RF_OPERATION = 162, | |
381 | I2400M_TLV_RF_STATUS = 163, | |
382 | I2400M_TLV_DEVICE_RESET_TYPE = 132, | |
383 | I2400M_TLV_CONFIG_IDLE_PARAMETERS = 601, | |
8987691a | 384 | I2400M_TLV_CONFIG_IDLE_TIMEOUT = 611, |
ea24652d IPG |
385 | }; |
386 | ||
387 | ||
388 | struct i2400m_tlv_hdr { | |
389 | __le16 type; | |
390 | __le16 length; /* payload's */ | |
391 | __u8 pl[0]; | |
392 | } __attribute__((packed)); | |
393 | ||
394 | ||
395 | struct i2400m_l3l4_hdr { | |
396 | __le16 type; | |
397 | __le16 length; /* payload's */ | |
398 | __le16 version; | |
399 | __le16 resv1; | |
400 | __le16 status; | |
401 | __le16 resv2; | |
402 | struct i2400m_tlv_hdr pl[0]; | |
403 | } __attribute__((packed)); | |
404 | ||
405 | ||
406 | /** | |
407 | * i2400m_system_state - different states of the device | |
408 | */ | |
409 | enum i2400m_system_state { | |
410 | I2400M_SS_UNINITIALIZED = 1, | |
411 | I2400M_SS_INIT, | |
412 | I2400M_SS_READY, | |
413 | I2400M_SS_SCAN, | |
414 | I2400M_SS_STANDBY, | |
415 | I2400M_SS_CONNECTING, | |
416 | I2400M_SS_WIMAX_CONNECTED, | |
417 | I2400M_SS_DATA_PATH_CONNECTED, | |
418 | I2400M_SS_IDLE, | |
419 | I2400M_SS_DISCONNECTING, | |
420 | I2400M_SS_OUT_OF_ZONE, | |
421 | I2400M_SS_SLEEPACTIVE, | |
422 | I2400M_SS_PRODUCTION, | |
423 | I2400M_SS_CONFIG, | |
424 | I2400M_SS_RF_OFF, | |
425 | I2400M_SS_RF_SHUTDOWN, | |
426 | I2400M_SS_DEVICE_DISCONNECT, | |
427 | I2400M_SS_MAX, | |
428 | }; | |
429 | ||
430 | ||
431 | /** | |
432 | * i2400m_tlv_system_state - report on the state of the system | |
433 | * | |
434 | * @state: see enum i2400m_system_state | |
435 | */ | |
436 | struct i2400m_tlv_system_state { | |
437 | struct i2400m_tlv_hdr hdr; | |
438 | __le32 state; | |
439 | } __attribute__((packed)); | |
440 | ||
441 | ||
442 | struct i2400m_tlv_l4_message_versions { | |
443 | struct i2400m_tlv_hdr hdr; | |
444 | __le16 major; | |
445 | __le16 minor; | |
446 | __le16 branch; | |
447 | __le16 reserved; | |
448 | } __attribute__((packed)); | |
449 | ||
450 | ||
451 | struct i2400m_tlv_detailed_device_info { | |
452 | struct i2400m_tlv_hdr hdr; | |
453 | __u8 reserved1[400]; | |
454 | __u8 mac_address[6]; | |
455 | __u8 reserved2[2]; | |
456 | } __attribute__((packed)); | |
457 | ||
458 | ||
459 | enum i2400m_rf_switch_status { | |
460 | I2400M_RF_SWITCH_ON = 1, | |
461 | I2400M_RF_SWITCH_OFF = 2, | |
462 | }; | |
463 | ||
464 | struct i2400m_tlv_rf_switches_status { | |
465 | struct i2400m_tlv_hdr hdr; | |
466 | __u8 sw_rf_switch; /* 1 ON, 2 OFF */ | |
467 | __u8 hw_rf_switch; /* 1 ON, 2 OFF */ | |
468 | __u8 reserved[2]; | |
469 | } __attribute__((packed)); | |
470 | ||
471 | ||
472 | enum { | |
473 | i2400m_rf_operation_on = 1, | |
474 | i2400m_rf_operation_off = 2 | |
475 | }; | |
476 | ||
477 | struct i2400m_tlv_rf_operation { | |
478 | struct i2400m_tlv_hdr hdr; | |
479 | __le32 status; /* 1 ON, 2 OFF */ | |
480 | } __attribute__((packed)); | |
481 | ||
482 | ||
483 | enum i2400m_tlv_reset_type { | |
484 | I2400M_RESET_TYPE_COLD = 1, | |
485 | I2400M_RESET_TYPE_WARM | |
486 | }; | |
487 | ||
488 | struct i2400m_tlv_device_reset_type { | |
489 | struct i2400m_tlv_hdr hdr; | |
490 | __le32 reset_type; | |
491 | } __attribute__((packed)); | |
492 | ||
493 | ||
494 | struct i2400m_tlv_config_idle_parameters { | |
495 | struct i2400m_tlv_hdr hdr; | |
496 | __le32 idle_timeout; /* 100 to 300000 ms [5min], 100 increments | |
497 | * 0 disabled */ | |
498 | __le32 idle_paging_interval; /* frames */ | |
499 | } __attribute__((packed)); | |
500 | ||
501 | ||
502 | enum i2400m_media_status { | |
503 | I2400M_MEDIA_STATUS_LINK_UP = 1, | |
504 | I2400M_MEDIA_STATUS_LINK_DOWN, | |
505 | I2400M_MEDIA_STATUS_LINK_RENEW, | |
506 | }; | |
507 | ||
508 | struct i2400m_tlv_media_status { | |
509 | struct i2400m_tlv_hdr hdr; | |
510 | __le32 media_status; | |
511 | } __attribute__((packed)); | |
512 | ||
8987691a IPG |
513 | |
514 | /* New in v1.4 */ | |
515 | struct i2400m_tlv_config_idle_timeout { | |
516 | struct i2400m_tlv_hdr hdr; | |
517 | __le32 timeout; /* 100 to 300000 ms [5min], 100 increments | |
518 | * 0 disabled */ | |
519 | } __attribute__((packed)); | |
520 | ||
521 | ||
ea24652d | 522 | #endif /* #ifndef __LINUX__WIMAX__I2400M_H__ */ |