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Benjamin Herrenschmidt0365ba72005-09-22 21:44:06 -07001#ifndef _SMU_H
2#define _SMU_H
3
Linus Torvalds1da177e2005-04-16 15:20:36 -07004/*
5 * Definitions for talking to the SMU chip in newer G5 PowerMacs
6 */
Arnd Bergmann88ced032005-12-16 22:43:46 +01007#ifdef __KERNEL__
Linus Torvalds1da177e2005-04-16 15:20:36 -07008#include <linux/config.h>
Benjamin Herrenschmidt0365ba72005-09-22 21:44:06 -07009#include <linux/list.h>
Arnd Bergmann88ced032005-12-16 22:43:46 +010010#endif
11#include <linux/types.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012
13/*
Benjamin Herrenschmidt0365ba72005-09-22 21:44:06 -070014 * Known SMU commands
15 *
16 * Most of what is below comes from looking at the Open Firmware driver,
17 * though this is still incomplete and could use better documentation here
18 * or there...
19 */
20
21
22/*
23 * Partition info commands
24 *
Adrian Bunk943ffb52006-01-10 00:10:13 +010025 * These commands are used to retrieve the sdb-partition-XX datas from
Benjamin Herrenschmidt183d0202005-11-07 14:29:02 +110026 * the SMU. The lenght is always 2. First byte is the subcommand code
27 * and second byte is the partition ID.
28 *
29 * The reply is 6 bytes:
30 *
31 * - 0..1 : partition address
32 * - 2 : a byte containing the partition ID
33 * - 3 : length (maybe other bits are rest of header ?)
34 *
35 * The data must then be obtained with calls to another command:
36 * SMU_CMD_MISC_ee_GET_DATABLOCK_REC (described below).
Benjamin Herrenschmidt0365ba72005-09-22 21:44:06 -070037 */
38#define SMU_CMD_PARTITION_COMMAND 0x3e
Benjamin Herrenschmidt183d0202005-11-07 14:29:02 +110039#define SMU_CMD_PARTITION_LATEST 0x01
40#define SMU_CMD_PARTITION_BASE 0x02
41#define SMU_CMD_PARTITION_UPDATE 0x03
Benjamin Herrenschmidt0365ba72005-09-22 21:44:06 -070042
43
44/*
45 * Fan control
46 *
Benjamin Herrenschmidt183d0202005-11-07 14:29:02 +110047 * This is a "mux" for fan control commands. The command seem to
48 * act differently based on the number of arguments. With 1 byte
49 * of argument, this seem to be queries for fans status, setpoint,
50 * etc..., while with 0xe arguments, we will set the fans speeds.
51 *
52 * Queries (1 byte arg):
53 * ---------------------
54 *
55 * arg=0x01: read RPM fans status
56 * arg=0x02: read RPM fans setpoint
57 * arg=0x11: read PWM fans status
58 * arg=0x12: read PWM fans setpoint
59 *
60 * the "status" queries return the current speed while the "setpoint" ones
61 * return the programmed/target speed. It _seems_ that the result is a bit
62 * mask in the first byte of active/available fans, followed by 6 words (16
63 * bits) containing the requested speed.
64 *
65 * Setpoint (14 bytes arg):
66 * ------------------------
67 *
68 * first arg byte is 0 for RPM fans and 0x10 for PWM. Second arg byte is the
69 * mask of fans affected by the command. Followed by 6 words containing the
70 * setpoint value for selected fans in the mask (or 0 if mask value is 0)
Benjamin Herrenschmidt0365ba72005-09-22 21:44:06 -070071 */
72#define SMU_CMD_FAN_COMMAND 0x4a
73
74
75/*
76 * Battery access
77 *
78 * Same command number as the PMU, could it be same syntax ?
79 */
80#define SMU_CMD_BATTERY_COMMAND 0x6f
81#define SMU_CMD_GET_BATTERY_INFO 0x00
82
83/*
84 * Real time clock control
85 *
86 * This is a "mux", first data byte contains the "sub" command.
87 * The "RTC" part of the SMU controls the date, time, powerup
88 * timer, but also a PRAM
89 *
90 * Dates are in BCD format on 7 bytes:
91 * [sec] [min] [hour] [weekday] [month day] [month] [year]
92 * with month being 1 based and year minus 100
93 */
94#define SMU_CMD_RTC_COMMAND 0x8e
95#define SMU_CMD_RTC_SET_PWRUP_TIMER 0x00 /* i: 7 bytes date */
96#define SMU_CMD_RTC_GET_PWRUP_TIMER 0x01 /* o: 7 bytes date */
97#define SMU_CMD_RTC_STOP_PWRUP_TIMER 0x02
98#define SMU_CMD_RTC_SET_PRAM_BYTE_ACC 0x20 /* i: 1 byte (address?) */
99#define SMU_CMD_RTC_SET_PRAM_AUTOINC 0x21 /* i: 1 byte (data?) */
100#define SMU_CMD_RTC_SET_PRAM_LO_BYTES 0x22 /* i: 10 bytes */
101#define SMU_CMD_RTC_SET_PRAM_HI_BYTES 0x23 /* i: 10 bytes */
102#define SMU_CMD_RTC_GET_PRAM_BYTE 0x28 /* i: 1 bytes (address?) */
103#define SMU_CMD_RTC_GET_PRAM_LO_BYTES 0x29 /* o: 10 bytes */
104#define SMU_CMD_RTC_GET_PRAM_HI_BYTES 0x2a /* o: 10 bytes */
105#define SMU_CMD_RTC_SET_DATETIME 0x80 /* i: 7 bytes date */
106#define SMU_CMD_RTC_GET_DATETIME 0x81 /* o: 7 bytes date */
107
108 /*
109 * i2c commands
110 *
111 * To issue an i2c command, first is to send a parameter block to the
112 * the SMU. This is a command of type 0x9a with 9 bytes of header
113 * eventually followed by data for a write:
114 *
115 * 0: bus number (from device-tree usually, SMU has lots of busses !)
116 * 1: transfer type/format (see below)
117 * 2: device address. For combined and combined4 type transfers, this
118 * is the "write" version of the address (bit 0x01 cleared)
119 * 3: subaddress length (0..3)
120 * 4: subaddress byte 0 (or only byte for subaddress length 1)
121 * 5: subaddress byte 1
122 * 6: subaddress byte 2
123 * 7: combined address (device address for combined mode data phase)
124 * 8: data length
125 *
126 * The transfer types are the same good old Apple ones it seems,
127 * that is:
128 * - 0x00: Simple transfer
129 * - 0x01: Subaddress transfer (addr write + data tx, no restart)
130 * - 0x02: Combined transfer (addr write + restart + data tx)
131 *
132 * This is then followed by actual data for a write.
133 *
134 * At this point, the OF driver seems to have a limitation on transfer
135 * sizes of 0xd bytes on reads and 0x5 bytes on writes. I do not know
136 * wether this is just an OF limit due to some temporary buffer size
137 * or if this is an SMU imposed limit. This driver has the same limitation
138 * for now as I use a 0x10 bytes temporary buffer as well
139 *
140 * Once that is completed, a response is expected from the SMU. This is
141 * obtained via a command of type 0x9a with a length of 1 byte containing
142 * 0 as the data byte. OF also fills the rest of the data buffer with 0xff's
143 * though I can't tell yet if this is actually necessary. Once this command
144 * is complete, at this point, all I can tell is what OF does. OF tests
145 * byte 0 of the reply:
146 * - on read, 0xfe or 0xfc : bus is busy, wait (see below) or nak ?
147 * - on read, 0x00 or 0x01 : reply is in buffer (after the byte 0)
148 * - on write, < 0 -> failure (immediate exit)
149 * - else, OF just exists (without error, weird)
150 *
151 * So on read, there is this wait-for-busy thing when getting a 0xfc or
152 * 0xfe result. OF does a loop of up to 64 retries, waiting 20ms and
153 * doing the above again until either the retries expire or the result
154 * is no longer 0xfe or 0xfc
155 *
156 * The Darwin I2C driver is less subtle though. On any non-success status
157 * from the response command, it waits 5ms and tries again up to 20 times,
158 * it doesn't differenciate between fatal errors or "busy" status.
159 *
160 * This driver provides an asynchronous paramblock based i2c command
161 * interface to be used either directly by low level code or by a higher
162 * level driver interfacing to the linux i2c layer. The current
163 * implementation of this relies on working timers & timer interrupts
164 * though, so be careful of calling context for now. This may be "fixed"
165 * in the future by adding a polling facility.
166 */
167#define SMU_CMD_I2C_COMMAND 0x9a
168 /* transfer types */
169#define SMU_I2C_TRANSFER_SIMPLE 0x00
170#define SMU_I2C_TRANSFER_STDSUB 0x01
171#define SMU_I2C_TRANSFER_COMBINED 0x02
172
173/*
174 * Power supply control
175 *
176 * The "sub" command is an ASCII string in the data, the
177 * data lenght is that of the string.
178 *
179 * The VSLEW command can be used to get or set the voltage slewing.
180 * - lenght 5 (only "VSLEW") : it returns "DONE" and 3 bytes of
181 * reply at data offset 6, 7 and 8.
182 * - lenght 8 ("VSLEWxyz") has 3 additional bytes appended, and is
183 * used to set the voltage slewing point. The SMU replies with "DONE"
184 * I yet have to figure out their exact meaning of those 3 bytes in
Benjamin Herrenschmidt43501472005-11-07 14:27:33 +1100185 * both cases. They seem to be:
186 * x = processor mask
187 * y = op. point index
188 * z = processor freq. step index
189 * I haven't yet decyphered result codes
Benjamin Herrenschmidt0365ba72005-09-22 21:44:06 -0700190 *
191 */
192#define SMU_CMD_POWER_COMMAND 0xaa
193#define SMU_CMD_POWER_RESTART "RESTART"
194#define SMU_CMD_POWER_SHUTDOWN "SHUTDOWN"
195#define SMU_CMD_POWER_VOLTAGE_SLEW "VSLEW"
196
Benjamin Herrenschmidt183d0202005-11-07 14:29:02 +1100197/*
198 * Read ADC sensors
199 *
200 * This command takes one byte of parameter: the sensor ID (or "reg"
201 * value in the device-tree) and returns a 16 bits value
202 */
203#define SMU_CMD_READ_ADC 0xd8
204
Benjamin Herrenschmidt0365ba72005-09-22 21:44:06 -0700205/* Misc commands
206 *
207 * This command seem to be a grab bag of various things
208 */
209#define SMU_CMD_MISC_df_COMMAND 0xdf
210#define SMU_CMD_MISC_df_SET_DISPLAY_LIT 0x02 /* i: 1 byte */
211#define SMU_CMD_MISC_df_NMI_OPTION 0x04
212
213/*
214 * Version info commands
215 *
216 * I haven't quite tried to figure out how these work
217 */
218#define SMU_CMD_VERSION_COMMAND 0xea
219
220
221/*
222 * Misc commands
223 *
224 * This command seem to be a grab bag of various things
Benjamin Herrenschmidt183d0202005-11-07 14:29:02 +1100225 *
226 * SMU_CMD_MISC_ee_GET_DATABLOCK_REC is used, among others, to
227 * transfer blocks of data from the SMU. So far, I've decrypted it's
Adrian Bunk943ffb52006-01-10 00:10:13 +0100228 * usage to retrieve partition data. In order to do that, you have to
Benjamin Herrenschmidt183d0202005-11-07 14:29:02 +1100229 * break your transfer in "chunks" since that command cannot transfer
230 * more than a chunk at a time. The chunk size used by OF is 0xe bytes,
231 * but it seems that the darwin driver will let you do 0x1e bytes if
232 * your "PMU" version is >= 0x30. You can get the "PMU" version apparently
233 * either in the last 16 bits of property "smu-version-pmu" or as the 16
234 * bytes at offset 1 of "smu-version-info"
235 *
236 * For each chunk, the command takes 7 bytes of arguments:
237 * byte 0: subcommand code (0x02)
238 * byte 1: 0x04 (always, I don't know what it means, maybe the address
239 * space to use or some other nicety. It's hard coded in OF)
240 * byte 2..5: SMU address of the chunk (big endian 32 bits)
241 * byte 6: size to transfer (up to max chunk size)
242 *
243 * The data is returned directly
Benjamin Herrenschmidt0365ba72005-09-22 21:44:06 -0700244 */
245#define SMU_CMD_MISC_ee_COMMAND 0xee
246#define SMU_CMD_MISC_ee_GET_DATABLOCK_REC 0x02
247#define SMU_CMD_MISC_ee_LEDS_CTRL 0x04 /* i: 00 (00,01) [00] */
248#define SMU_CMD_MISC_ee_GET_DATA 0x05 /* i: 00 , o: ?? */
249
250
251
252/*
253 * - Kernel side interface -
254 */
255
256#ifdef __KERNEL__
257
258/*
259 * Asynchronous SMU commands
260 *
261 * Fill up this structure and submit it via smu_queue_command(),
262 * and get notified by the optional done() callback, or because
263 * status becomes != 1
264 */
265
266struct smu_cmd;
267
268struct smu_cmd
269{
270 /* public */
271 u8 cmd; /* command */
272 int data_len; /* data len */
273 int reply_len; /* reply len */
274 void *data_buf; /* data buffer */
275 void *reply_buf; /* reply buffer */
276 int status; /* command status */
277 void (*done)(struct smu_cmd *cmd, void *misc);
278 void *misc;
279
280 /* private */
281 struct list_head link;
282};
283
284/*
285 * Queues an SMU command, all fields have to be initialized
286 */
287extern int smu_queue_cmd(struct smu_cmd *cmd);
288
289/*
290 * Simple command wrapper. This structure embeds a small buffer
291 * to ease sending simple SMU commands from the stack
292 */
293struct smu_simple_cmd
294{
295 struct smu_cmd cmd;
296 u8 buffer[16];
297};
298
299/*
300 * Queues a simple command. All fields will be initialized by that
301 * function
302 */
303extern int smu_queue_simple(struct smu_simple_cmd *scmd, u8 command,
304 unsigned int data_len,
305 void (*done)(struct smu_cmd *cmd, void *misc),
306 void *misc,
307 ...);
308
309/*
310 * Completion helper. Pass it to smu_queue_simple or as 'done'
311 * member to smu_queue_cmd, it will call complete() on the struct
312 * completion passed in the "misc" argument
313 */
314extern void smu_done_complete(struct smu_cmd *cmd, void *misc);
315
316/*
317 * Synchronous helpers. Will spin-wait for completion of a command
318 */
319extern void smu_spinwait_cmd(struct smu_cmd *cmd);
320
321static inline void smu_spinwait_simple(struct smu_simple_cmd *scmd)
322{
323 smu_spinwait_cmd(&scmd->cmd);
324}
325
326/*
327 * Poll routine to call if blocked with irqs off
328 */
329extern void smu_poll(void);
330
331
332/*
333 * Init routine, presence check....
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 */
335extern int smu_init(void);
336extern int smu_present(void);
Benjamin Herrenschmidt0365ba72005-09-22 21:44:06 -0700337struct of_device;
338extern struct of_device *smu_get_ofdev(void);
339
340
341/*
342 * Common command wrappers
343 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344extern void smu_shutdown(void);
345extern void smu_restart(void);
Benjamin Herrenschmidt0365ba72005-09-22 21:44:06 -0700346struct rtc_time;
347extern int smu_get_rtc_time(struct rtc_time *time, int spinwait);
348extern int smu_set_rtc_time(struct rtc_time *time, int spinwait);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349
350/*
351 * SMU command buffer absolute address, exported by pmac_setup,
352 * this is allocated very early during boot.
353 */
354extern unsigned long smu_cmdbuf_abs;
Benjamin Herrenschmidt0365ba72005-09-22 21:44:06 -0700355
356
357/*
358 * Kenrel asynchronous i2c interface
359 */
360
Benjamin Herrenschmidt730745a2006-01-07 11:30:44 +1100361#define SMU_I2C_READ_MAX 0x1d
362#define SMU_I2C_WRITE_MAX 0x15
363
Benjamin Herrenschmidt0365ba72005-09-22 21:44:06 -0700364/* SMU i2c header, exactly matches i2c header on wire */
365struct smu_i2c_param
366{
367 u8 bus; /* SMU bus ID (from device tree) */
368 u8 type; /* i2c transfer type */
369 u8 devaddr; /* device address (includes direction) */
370 u8 sublen; /* subaddress length */
371 u8 subaddr[3]; /* subaddress */
372 u8 caddr; /* combined address, filled by SMU driver */
373 u8 datalen; /* length of transfer */
Benjamin Herrenschmidt730745a2006-01-07 11:30:44 +1100374 u8 data[SMU_I2C_READ_MAX]; /* data */
Benjamin Herrenschmidt0365ba72005-09-22 21:44:06 -0700375};
376
Benjamin Herrenschmidt0365ba72005-09-22 21:44:06 -0700377struct smu_i2c_cmd
378{
379 /* public */
380 struct smu_i2c_param info;
381 void (*done)(struct smu_i2c_cmd *cmd, void *misc);
382 void *misc;
383 int status; /* 1 = pending, 0 = ok, <0 = fail */
384
385 /* private */
386 struct smu_cmd scmd;
387 int read;
388 int stage;
389 int retries;
Benjamin Herrenschmidt730745a2006-01-07 11:30:44 +1100390 u8 pdata[32];
Benjamin Herrenschmidt0365ba72005-09-22 21:44:06 -0700391 struct list_head link;
392};
393
394/*
395 * Call this to queue an i2c command to the SMU. You must fill info,
396 * including info.data for a write, done and misc.
397 * For now, no polling interface is provided so you have to use completion
398 * callback.
399 */
400extern int smu_queue_i2c(struct smu_i2c_cmd *cmd);
401
402
403#endif /* __KERNEL__ */
404
Benjamin Herrenschmidt43501472005-11-07 14:27:33 +1100405
406/*
407 * - SMU "sdb" partitions informations -
408 */
409
410
411/*
412 * Partition header format
413 */
414struct smu_sdbp_header {
415 __u8 id;
416 __u8 len;
417 __u8 version;
418 __u8 flags;
419};
420
Benjamin Herrenschmidt183d0202005-11-07 14:29:02 +1100421
422 /*
423 * demangle 16 and 32 bits integer in some SMU partitions
424 * (currently, afaik, this concerns only the FVT partition
425 * (0x12)
Benjamin Herrenschmidt43501472005-11-07 14:27:33 +1100426 */
Benjamin Herrenschmidt183d0202005-11-07 14:29:02 +1100427#define SMU_U16_MIX(x) le16_to_cpu(x);
428#define SMU_U32_MIX(x) ((((x) & 0xff00ff00u) >> 8)|(((x) & 0x00ff00ffu) << 8))
429
Benjamin Herrenschmidt43501472005-11-07 14:27:33 +1100430
431/* This is the definition of the SMU sdb-partition-0x12 table (called
432 * CPU F/V/T operating points in Darwin). The definition for all those
433 * SMU tables should be moved to some separate file
434 */
Benjamin Herrenschmidt183d0202005-11-07 14:29:02 +1100435#define SMU_SDB_FVT_ID 0x12
Benjamin Herrenschmidt43501472005-11-07 14:27:33 +1100436
437struct smu_sdbp_fvt {
438 __u32 sysclk; /* Base SysClk frequency in Hz for
Benjamin Herrenschmidt183d0202005-11-07 14:29:02 +1100439 * this operating point. Value need to
440 * be unmixed with SMU_U32_MIX()
Benjamin Herrenschmidt43501472005-11-07 14:27:33 +1100441 */
442 __u8 pad;
443 __u8 maxtemp; /* Max temp. supported by this
444 * operating point
445 */
446
447 __u16 volts[3]; /* CPU core voltage for the 3
448 * PowerTune modes, a mode with
Benjamin Herrenschmidt183d0202005-11-07 14:29:02 +1100449 * 0V = not supported. Value need
450 * to be unmixed with SMU_U16_MIX()
Benjamin Herrenschmidt43501472005-11-07 14:27:33 +1100451 */
452};
453
Benjamin Herrenschmidt183d0202005-11-07 14:29:02 +1100454/* This partition contains voltage & current sensor calibration
455 * informations
456 */
457#define SMU_SDB_CPUVCP_ID 0x21
458
459struct smu_sdbp_cpuvcp {
460 __u16 volt_scale; /* u4.12 fixed point */
461 __s16 volt_offset; /* s4.12 fixed point */
462 __u16 curr_scale; /* u4.12 fixed point */
463 __s16 curr_offset; /* s4.12 fixed point */
464 __s32 power_quads[3]; /* s4.28 fixed point */
465};
466
467/* This partition contains CPU thermal diode calibration
468 */
469#define SMU_SDB_CPUDIODE_ID 0x18
470
471struct smu_sdbp_cpudiode {
472 __u16 m_value; /* u1.15 fixed point */
473 __s16 b_value; /* s10.6 fixed point */
474
475};
476
477/* This partition contains Slots power calibration
478 */
479#define SMU_SDB_SLOTSPOW_ID 0x78
480
481struct smu_sdbp_slotspow {
482 __u16 pow_scale; /* u4.12 fixed point */
483 __s16 pow_offset; /* s4.12 fixed point */
484};
485
486/* This partition contains machine specific version information about
487 * the sensor/control layout
488 */
489#define SMU_SDB_SENSORTREE_ID 0x25
490
491struct smu_sdbp_sensortree {
Arnd Bergmann88ced032005-12-16 22:43:46 +0100492 __u8 model_id;
493 __u8 unknown[3];
Benjamin Herrenschmidt183d0202005-11-07 14:29:02 +1100494};
495
496/* This partition contains CPU thermal control PID informations. So far
497 * only single CPU machines have been seen with an SMU, so we assume this
498 * carries only informations for those
499 */
500#define SMU_SDB_CPUPIDDATA_ID 0x17
501
502struct smu_sdbp_cpupiddata {
Arnd Bergmann88ced032005-12-16 22:43:46 +0100503 __u8 unknown1;
504 __u8 target_temp_delta;
505 __u8 unknown2;
506 __u8 history_len;
507 __s16 power_adj;
508 __u16 max_power;
509 __s32 gp,gr,gd;
Benjamin Herrenschmidt183d0202005-11-07 14:29:02 +1100510};
511
512
513/* Other partitions without known structures */
514#define SMU_SDB_DEBUG_SWITCHES_ID 0x05
515
Benjamin Herrenschmidt43501472005-11-07 14:27:33 +1100516#ifdef __KERNEL__
517/*
518 * This returns the pointer to an SMU "sdb" partition data or NULL
519 * if not found. The data format is described below
520 */
521extern struct smu_sdbp_header *smu_get_sdb_partition(int id,
Benjamin Herrenschmidt730745a2006-01-07 11:30:44 +1100522 unsigned int *size);
Benjamin Herrenschmidt43501472005-11-07 14:27:33 +1100523
Benjamin Herrenschmidtac171c42006-02-08 16:42:51 +1100524/* Get "sdb" partition data from an SMU satellite */
525extern struct smu_sdbp_header *smu_sat_get_sdb_partition(unsigned int sat_id,
526 int id, unsigned int *size);
527
528
Benjamin Herrenschmidt43501472005-11-07 14:27:33 +1100529#endif /* __KERNEL__ */
530
531
Benjamin Herrenschmidt0365ba72005-09-22 21:44:06 -0700532/*
533 * - Userland interface -
534 */
535
536/*
537 * A given instance of the device can be configured for 2 different
538 * things at the moment:
539 *
540 * - sending SMU commands (default at open() time)
541 * - receiving SMU events (not yet implemented)
542 *
543 * Commands are written with write() of a command block. They can be
544 * "driver" commands (for example to switch to event reception mode)
545 * or real SMU commands. They are made of a header followed by command
546 * data if any.
547 *
548 * For SMU commands (not for driver commands), you can then read() back
549 * a reply. The reader will be blocked or not depending on how the device
550 * file is opened. poll() isn't implemented yet. The reply will consist
551 * of a header as well, followed by the reply data if any. You should
552 * always provide a buffer large enough for the maximum reply data, I
553 * recommand one page.
554 *
555 * It is illegal to send SMU commands through a file descriptor configured
556 * for events reception
557 *
558 */
559struct smu_user_cmd_hdr
560{
561 __u32 cmdtype;
562#define SMU_CMDTYPE_SMU 0 /* SMU command */
563#define SMU_CMDTYPE_WANTS_EVENTS 1 /* switch fd to events mode */
Adrian Bunk943ffb52006-01-10 00:10:13 +0100564#define SMU_CMDTYPE_GET_PARTITION 2 /* retrieve an sdb partition */
Benjamin Herrenschmidt0365ba72005-09-22 21:44:06 -0700565
566 __u8 cmd; /* SMU command byte */
Benjamin Herrenschmidt183d0202005-11-07 14:29:02 +1100567 __u8 pad[3]; /* padding */
Benjamin Herrenschmidt0365ba72005-09-22 21:44:06 -0700568 __u32 data_len; /* Lenght of data following */
569};
570
571struct smu_user_reply_hdr
572{
573 __u32 status; /* Command status */
574 __u32 reply_len; /* Lenght of data follwing */
575};
576
577#endif /* _SMU_H */