Randall Spangler 1e4b0b6194 Implement I2C passthru command ...

This is a revised version of passthru which more closely resembles the
kernel interface.  It allows multiple read/write messages in a single
transaction, and sends back one accumulated result.

BUG=chrome-os-partner:18778
BRANCH=none
TEST=On link, from root shell:
    ectool i2cxfer 0 0xb 6 0x21
    Read bytes: 0x05 0x41 0x52 0x52 0x4f 0x57

(I did not actually run this with the updated code)

On pit, in U-Boot:

Read i2c values:
Peach #  crosec i2c md 48 0
0000: 00 00 3e 00 12 20 4b bf ff ff 20 00 1e 1e 1e 1f    ..>.. K... .....
Peach #  crosec i2c md 48 0 20
0000: 00 00 3e 00 12 20 4b bf ff ff 20 00 1e 1e 1e 1f    ..>.. K... .....
0010: 1f 1f 1f 1f 1f 1f 20 00 00 07 00 00 00 00 00 00    ...... .........

Update value at offset 10:
Peach #  crosec i2c mw 48 10 4
Peach #  crosec i2c md 48 0 20
0000: 00 00 3e 00 12 00 0b 1f 1f ff 20 00 1e 1e 1e 1f    ..>....... .....
0010: 04 1f 1f 1f 1f 1f 20 00 00 07 00 00 00 00 00 00    ...... .........
Peach #

On pit, in kernel:

localhost ~ # i2cdetect -y -a -r 20
 0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- UU -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --

localhost ~ # i2cdump -f -y 20 0x48
No size specified (using byte-data access)
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f    0123456789abcdef
00: 00 00 3e 00 12 00 0b 1f 1f ff 20 00 1e 1e 1e 1f    ..>.?.???. .????
10: 1f 1f 0e 1f 1f 0e 20 00 00 07 00 00 00 00 00 00    ?????? ..?......
20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................

localhost ~ # i2cset -f -y 20 0x48 0x10 0
localhost ~ # i2cdump -f -y 20 0x48
No size specified (using byte-data access)
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f    0123456789abcdef
00: 00 00 3e 00 12 00 0b 1f 1f ff 20 00 1e 1e 1e 1f    ..>.?.???. .????
10: 00 1f 0e 1f 1f 0e 20 00 00 07 00 00 00 00 00 00    .????? ..?......
20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................

localhost ~ # i2cset -f -y 20 0x48 0x10 0x1f
localhost ~ # i2cdump -f -y 20 0x48
No size specified (using byte-data access)
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f    0123456789abcdef
00: 00 00 3e 00 12 00 0b 1f 1f ff 20 00 1e 1e 1e 1f    ..>.?.???. .????
10: 1f 1f 0e 1f 1f 0e 20 00 00 07 00 00 00 00 00 00    ?????? ..?......

Change-Id: I14d47e1712828f726ac5caddc4beede251570ad3
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Updated to simplify protocol:
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/49958
Commit-Queue: Doug Anderson <dianders@chromium.org>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Tested-by: Doug Anderson <dianders@chromium.org>

2013-05-09 16:36:53 -07:00

..

adc.h

Fix ADC test for LM4

2013-04-30 10:38:43 -07:00

battery_pack.h

Cleanup: battery

2012-10-24 10:09:20 -07:00

battery.h

After shutting down AP, hibernate EC if battery is low

2013-03-05 10:26:21 -08:00

board_config.h

Clean up board configuration

2013-04-05 14:28:42 -07:00

charge_state.h

Replace generated CONFIG_TASK_ macros with HAS_TASK_

2013-04-24 16:32:58 -07:00

charger_bq24725.h

Cleanup - includes go in include dir

2012-05-25 09:59:58 -07:00

charger.h

Only ask the charger for current steps it can supply

2012-09-24 10:56:50 -07:00

chip_temp_sensor.h

Switch temp sensor polling to use hooks instead of task

2012-11-01 12:45:22 -07:00

chipset.h

Replace generated CONFIG_TASK_ macros with HAS_TASK_

2013-04-24 16:32:58 -07:00

clock.h

spring: Enable low power mode.

2013-03-26 18:03:20 -07:00

common.h

Move REG16 and REG32 macros to common.h

2013-04-10 11:19:38 -07:00

compile_time_macros.h

Improved the BUILD_ASSERT macro to work outside of functions.

2013-04-29 11:05:08 -07:00

console.h

Move files in preparation for merging keyboard_scan modules

2013-03-27 11:35:20 -07:00

dma.h

Trigger dma_init() via HOOK_INIT

2013-04-03 11:49:07 -07:00

ec_commands.h

Implement I2C passthru command

2013-05-09 16:36:53 -07:00

eeprom.h

Initial sources import 1/3

2011-12-07 19:10:02 +00:00

eoption.h

Clean up a few modules in common/

2012-10-26 09:49:38 -07:00

extpower_usb.h

Clean up USB external power module

2013-04-10 14:24:10 -07:00

extpower.h

Clean up USB external power module

2013-04-10 14:24:10 -07:00

flash.h

Use uintptr_t when converting integer from/to pointer

2013-05-07 20:59:53 -07:00

gaia_power.h

Unify lid switch processing

2013-04-24 00:06:00 -07:00

gpio.h

Refactor gpio_set_level() and gpio_pre_init()

2013-04-15 14:27:45 -07:00

hooks.h

Split out power button code from switch.c

2013-04-25 17:03:18 -07:00

host_command.h

Fix host command in 64-bit executable

2013-05-08 13:24:20 -07:00

host_test.h

Pthread-based emulator for unit testing

2013-05-07 09:09:50 -07:00

hwtimer.h

Move STM32 timer regs struct to registers.h

2013-04-17 18:47:05 -07:00

i2c_arbitration.h

Move I2C arbitration to its own file

2013-03-20 15:23:29 -07:00

i2c.h

Move i2cread and i2cwrite functions to i2c_common

2013-04-30 11:45:52 -07:00

i8042_protocol.h

More supports for A20 enable/disable

2012-11-04 20:27:57 -08:00

jtag.h

Clean up jtag module

2012-10-30 12:42:46 -07:00

keyboard_8042.h

Split out power button code from switch.c

2013-04-25 17:03:18 -07:00

keyboard_config.h

Move keyboard dimension and key constants to keyboard_config.h

2013-03-22 11:24:29 -07:00

keyboard_mkbp.h

Move files in preparation for merging keyboard_scan modules

2013-03-27 11:35:20 -07:00

keyboard_protocol.h

Move files in preparation for merging keyboard_scan modules

2013-03-27 11:35:20 -07:00

keyboard_raw.h

Replace generated CONFIG_TASK_ macros with HAS_TASK_

2013-04-24 16:32:58 -07:00

keyboard_scan.h

Replace generated CONFIG_TASK_ macros with HAS_TASK_

2013-04-24 16:32:58 -07:00

keyboard_test.h

Move keyboard dimension and key constants to keyboard_config.h

2013-03-22 11:24:29 -07:00

lid_switch.h

Split lid switch code out of switch.c to its own file

2013-04-02 14:12:57 -07:00

lightbar_msg_list.h

Create host-side lightbar bikeshedding tool.

2012-04-26 13:57:19 -07:00

lightbar.h

Cleanup: move lightbar command enum into ec_commands.h

2012-09-11 09:46:16 -07:00

link_defs.h

Pthread-based emulator for unit testing

2013-05-07 09:09:50 -07:00

lp5562.h

Add LP5562 functions to control engine execution state

2013-04-23 10:39:13 -07:00

lpc.h

More supports for A20 enable/disable

2012-11-04 20:27:57 -08:00

memory_commands.h

Initial sources import 2/3

2011-12-07 19:10:02 +00:00

onewire.h

Clean up LED and onewire modules

2012-10-25 14:12:11 -07:00

panic.h

Saving the main stack pointer at the entry of exception_panic.

2013-04-18 20:56:15 -07:00

peci.h

Switch temp sensor polling to use hooks instead of task

2012-11-01 12:45:22 -07:00

pmu_tpschrome.h

Rename REINIT to IDLE0 in TPS65090 charge state machine

2013-05-01 13:19:20 -07:00

port80.h

port80: Track and export last post code in previous boot

2012-08-13 14:58:38 -07:00

power_button.h

Split out power button code from switch.c

2013-04-25 17:03:18 -07:00

power_led.h

Replace generated CONFIG_TASK_ macros with HAS_TASK_

2013-04-24 16:32:58 -07:00

powerdemo.h

Initial sources import 1/3

2011-12-07 19:10:02 +00:00

printf.h

Clean up printf module

2012-10-25 14:12:10 -07:00

pwm.h

Split pwm.c into pwm_fan.c and pwm_kblight.c

2013-04-26 16:07:21 -07:00

queue.h

Refactor the i8042 module to be thread-safe.

2012-06-07 20:48:51 -07:00

sha256.h

Clean up vboot hash support

2012-10-25 17:03:44 -07:00

shared_mem.h

Tidy shared memory module

2012-08-09 17:40:37 -07:00

smart_battery_stub.h

Stub smart battery read/write functions

2012-06-27 03:22:17 -07:00

smart_battery.h

Stub smart battery read/write functions

2012-06-27 03:22:17 -07:00

spi.h

spi: Rewrite driver for new protocol, better performance

2012-09-17 10:10:14 -07:00

switch.h

Replace generated CONFIG_TASK_ macros with HAS_TASK_

2013-04-24 16:32:58 -07:00

system.h

Use uintptr_t when converting integer from/to pointer

2013-05-07 20:59:53 -07:00

task_id.h

Pthread-based emulator for unit testing

2013-05-07 09:09:50 -07:00

task.h

link: Fix overflow in hibernate time calculation

2012-11-01 10:08:54 -07:00

temp_sensor.h

Switch temp sensor polling to use hooks instead of task

2012-11-01 12:45:22 -07:00

test_util.h

Put test utility macros in header

2013-05-08 18:11:01 -07:00

thermal.h

Clean up thermal modules

2012-10-26 13:10:57 -07:00

timer.h

Use SECOND and MSEC constants

2012-10-29 16:52:49 -07:00

tmp006.h

Switch temp sensor polling to use hooks instead of task

2012-11-01 12:45:22 -07:00

tsu6721.h

spring: reset TSU6721 when Toad's ID changes

2013-03-20 01:02:09 -07:00

uart.h

Clean up UART module

2012-10-30 12:42:43 -07:00

usb_charge.h

Slippy uses dumb USB ports, not smart ones.

2013-05-02 18:10:46 -07:00

util.h

Improved the BUILD_ASSERT macro to work outside of functions.

2013-04-29 11:05:08 -07:00

vboot_hash.h

Invalidate hash if flash operation changes the hashed region

2012-12-10 15:14:38 -08:00

version.h

Use __packed instead of __attribute__((packed))

2012-06-28 17:40:39 -07:00

watchdog.h

Watchdog is reloaded by HOOK_TICK, not its own task

2012-10-30 15:33:24 -07:00

x86_power.h

Split x86_power.c into Ivybridge and Haswell variants

2013-04-30 19:03:03 -07:00