scottk/OpenCellular
1
0
Fork 0
mirror of https://github.com/Telecominfraproject/OpenCellular.git synced 2026-01-09 17:11:42 +00:00
Code Issues Packages Projects Releases Wiki Activity

eve_fp: minimalistic fingerprint sensor passthrough

Browse Source 
Simple hack to provide a pass-through relaying the fingerprint sensor
commands coming from the host.

Signed-off-by: Vincent Palatin <vpalatin@chromium.org>

BRANCH=none
BUG=b:35648259
TEST=on Eve, read sensor HWID from the kernel.

Change-Id: I04e7641fe4067f8378e0b798c529aded0f708b47
Reviewed-on: https://chromium-review.googlesource.com/452500
Commit-Ready: Vincent Palatin <vpalatin@chromium.org>
Tested-by: Vincent Palatin <vpalatin@chromium.org>
Tested-by: Todd Broch <tbroch@chromium.org>
Reviewed-by: Todd Broch <tbroch@chromium.org>
This commit is contained in:
Vincent Palatin
2017-03-09 14:12:10 +01:00
committed by chrome-bot
parent c5c5a57f90
commit 363407db47
2 changed files with 48 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

34
board/eve_fp/board.c
View File

@@ -7,7 +7,9 @@
#include "console.h"
#include "gpio.h"
#include "hooks.h"
#include "host_command.h"
#include "spi.h"
#include "system.h"
#include "registers.h"
#include "gpio_list.h"
@@ -41,3 +43,35 @@ static void board_init(void)
hook_notify(HOOK_CHIPSET_RESUME);
}
DECLARE_HOOK(HOOK_INIT, board_init, HOOK_PRIO_DEFAULT);
static int fp_command_passthru(struct host_cmd_handler_args *args)
{
const struct ec_params_fp_passthru *params = args->params;
void *out = args->response;
int rc;
int ret = EC_RES_SUCCESS;
if (system_is_locked())
return EC_RES_ACCESS_DENIED;
if (params->len > args->params_size +
offsetof(struct ec_params_fp_passthru, data) ||
params->len > args->response_max)
return EC_RES_INVALID_PARAM;
rc = spi_transaction_async(&spi_devices[0], params->data,
params->len, out, SPI_READBACK_ALL);
if (params->flags & EC_FP_FLAG_NOT_COMPLETE)
rc |= spi_transaction_wait(&spi_devices[0]);
else
rc |= spi_transaction_flush(&spi_devices[0]);
if (rc == EC_ERROR_TIMEOUT)
ret = EC_RES_TIMEOUT;
else if (rc)
ret = EC_RES_ERROR;
args->response_size = params->len;
return ret;
}
DECLARE_HOST_COMMAND(EC_CMD_FP_PASSTHRU, fp_command_passthru, EC_VER_MASK(0));

14
include/ec_commands.h
View File

@@ -4039,6 +4039,20 @@ struct __ec_align2 ec_response_pd_chip_info {
#define EC_CMD_CR51_BASE 0x0300
#define EC_CMD_CR51_LAST 0x03FF
/*****************************************************************************/
/* Fingerprint MCU commands: range 0x0400-0x040x */
/* Fingerprint SPI sensor passthru command */
#define EC_CMD_FP_PASSTHRU 0x0400
#define EC_FP_FLAG_NOT_COMPLETE 0x1
struct __ec_align2 ec_params_fp_passthru {
uint16_t len; /* Number of bytes to write then read */
uint16_t flags; /* EC_FP_FLAG_xxx */
uint8_t data[]; /* Data to send */
};
/*****************************************************************************/
/*
* Reserve a range of host commands for board-specific, experimental, or