void google_chromeec_check_pd_image(int expected_type)
{
struct chromeec_command cec_cmd;
struct ec_response_get_version cec_resp = { { 0 } };
cec_cmd.cmd_code = EC_CMD_GET_VERSION;
cec_cmd.cmd_version = 0;
cec_cmd.cmd_data_out = &cec_resp;
cec_cmd.cmd_size_in = 0;
cec_cmd.cmd_size_out = sizeof(cec_resp);
cec_cmd.cmd_dev_index = 1; /* PD */
google_chromeec_command(&cec_cmd);
if (cec_cmd.cmd_code || cec_resp.current_image != expected_type) {
struct ec_params_reboot_ec reboot_ec;
/* Reboot the PD and make it come back in RO mode */
reboot_ec.cmd = EC_REBOOT_COLD;
reboot_ec.flags = 0;
cec_cmd.cmd_code = EC_CMD_REBOOT_EC;
cec_cmd.cmd_version = 0;
cec_cmd.cmd_data_in = &reboot_ec;
cec_cmd.cmd_size_in = sizeof(reboot_ec);
cec_cmd.cmd_size_out = 0; /* ignore response, if any */
cec_cmd.cmd_dev_index = 1; /* PD */
printk(BIOS_DEBUG, "Rebooting PD to RO mode\n");
google_chromeec_command(&cec_cmd);
udelay(1000);
}
}
/* Check for recovery mode and ensure EC is in RO */
void google_chromeec_early_init(void)
{
struct chromeec_command cec_cmd;
struct ec_response_get_version cec_resp = {{0}};
cec_cmd.cmd_code = EC_CMD_GET_VERSION;
cec_cmd.cmd_version = 0;
cec_cmd.cmd_data_out = &cec_resp;
cec_cmd.cmd_size_in = 0;
cec_cmd.cmd_size_out = sizeof(cec_resp);
google_chromeec_command(&cec_cmd);
if (cec_cmd.cmd_code ||
(recovery_mode_enabled() &&
(cec_resp.current_image != EC_IMAGE_RO))) {
struct ec_params_reboot_ec reboot_ec;
/* Reboot the EC and make it come back in RO mode */
reboot_ec.cmd = EC_REBOOT_COLD;
reboot_ec.flags = 0;
cec_cmd.cmd_code = EC_CMD_REBOOT_EC;
cec_cmd.cmd_version = 0;
cec_cmd.cmd_data_in = &reboot_ec;
cec_cmd.cmd_size_in = sizeof(reboot_ec);
cec_cmd.cmd_size_out = 0; /* ignore response, if any */
printk(BIOS_DEBUG, "Rebooting with EC in RO mode:\n");
google_chromeec_command(&cec_cmd);
udelay(1000);
hard_reset();
hlt();
}
}
void google_chromeec_init(void)
{
struct chromeec_command cec_cmd;
struct ec_response_get_version cec_resp = {{0}};
printk(BIOS_DEBUG, "Google Chrome EC: Initializing keyboard.\n");
google_chromeec_hello();
cec_cmd.cmd_code = EC_CMD_GET_VERSION;
cec_cmd.cmd_version = 0;
cec_cmd.cmd_data_out = &cec_resp;
cec_cmd.cmd_size_in = 0;
cec_cmd.cmd_size_out = sizeof(cec_resp);
cec_cmd.cmd_dev_index = 0;
google_chromeec_command(&cec_cmd);
if (cec_cmd.cmd_code) {
printk(BIOS_DEBUG,
"Google Chrome EC: version command failed!\n");
} else {
printk(BIOS_DEBUG, "Google Chrome EC: version:\n");
printk(BIOS_DEBUG, " ro: %s\n", cec_resp.version_string_ro);
printk(BIOS_DEBUG, " rw: %s\n", cec_resp.version_string_rw);
printk(BIOS_DEBUG, " running image: %d\n",
cec_resp.current_image);
ec_image_type = cec_resp.current_image;
}
if (cec_cmd.cmd_code ||
(recovery_mode_enabled() &&
(cec_resp.current_image != EC_IMAGE_RO))) {
struct ec_params_reboot_ec reboot_ec;
/* Reboot the EC and make it come back in RO mode */
reboot_ec.cmd = EC_REBOOT_COLD;
reboot_ec.flags = 0;
cec_cmd.cmd_code = EC_CMD_REBOOT_EC;
cec_cmd.cmd_version = 0;
cec_cmd.cmd_data_in = &reboot_ec;
cec_cmd.cmd_size_in = sizeof(reboot_ec);
cec_cmd.cmd_size_out = 0; /* ignore response, if any */
cec_cmd.cmd_dev_index = 0;
printk(BIOS_DEBUG, "Rebooting with EC in RO mode:\n");
post_code(0); /* clear current post code */
google_chromeec_command(&cec_cmd);
udelay(1000);
hard_reset();
halt();
}
}
int google_chromeec_vbnv_context(int is_read, uint8_t *data, int len)
{
struct chromeec_command cec_cmd;
struct ec_params_vbnvcontext cmd_vbnvcontext;
struct ec_response_vbnvcontext rsp_vbnvcontext;
if (len != EC_VBNV_BLOCK_SIZE)
return -1;
cec_cmd.cmd_code = EC_CMD_VBNV_CONTEXT;
cec_cmd.cmd_version = EC_VER_VBNV_CONTEXT;
cec_cmd.cmd_data_in = &cmd_vbnvcontext;
cec_cmd.cmd_data_out = &rsp_vbnvcontext;
cec_cmd.cmd_size_in = sizeof(cmd_vbnvcontext);
cec_cmd.cmd_size_out = sizeof(rsp_vbnvcontext);
cmd_vbnvcontext.op = is_read ? EC_VBNV_CONTEXT_OP_READ :
EC_VBNV_CONTEXT_OP_WRITE;
if (!is_read)
memcpy(&cmd_vbnvcontext.block, data, EC_VBNV_BLOCK_SIZE);
google_chromeec_command(&cec_cmd);
if (is_read)
memcpy(data, &rsp_vbnvcontext.block, EC_VBNV_BLOCK_SIZE);
return cec_cmd.cmd_code;
}
static int google_chromeec_handle_non_uhepi_cmd(uint8_t hcmd, uint8_t action,
uint64_t *value)
{
int ret = -1;
struct ec_params_host_event_mask req;
struct ec_response_host_event_mask rsp;
struct chromeec_command cmd;
if (hcmd == INVALID_HCMD)
return ret;
if (action != EC_HOST_EVENT_GET)
req.mask = (uint32_t)*value;
else
*value = 0;
cmd.cmd_code = hcmd;
cmd.cmd_version = 0;
cmd.cmd_data_in = &req;
cmd.cmd_size_in = sizeof(req);
cmd.cmd_data_out = &rsp;
cmd.cmd_size_out = sizeof(rsp);
cmd.cmd_dev_index = 0;
ret = google_chromeec_command(&cmd);
if (action != EC_HOST_EVENT_GET)
return ret;
if (ret == 0)
*value = rsp.mask;
return ret;
}
/**
* Write a single block to the flash
*
* Write a block of data to the EC flash. The size must not exceed the flash
* write block size which you can obtain from cros_ec_flash_write_burst_size().
*
* The offset starts at 0. You can obtain the region information from
* cros_ec_flash_offset() to find out where to write for a particular region.
*
* Attempting to write to the region where the EC is currently running from
* will result in an error.
*
* @param data Pointer to data buffer to write
* @param offset Offset within flash to write to.
* @param size Number of bytes to write
* @return 0 if ok, -1 on error
*/
int google_chromeec_flash_write_block(const uint8_t *data,
uint32_t offset, uint32_t size)
{
struct chromeec_command cec_cmd;
struct ec_params_flash_write *p;
assert(data);
/* Make sure request fits in the allowed packet size */
if (bufsize == 0) {
bufsize = sizeof(*p) + size;
buf = malloc(bufsize);
} else if (bufsize != sizeof(*p) + size) {
free(buf);
bufsize = sizeof(*p) + size;
buf = malloc(bufsize);
}
if (bufsize > EC_LPC_HOST_PACKET_SIZE)
return -1;
p = (struct ec_params_flash_write *)buf;
p->offset = offset;
p->size = size;
memcpy(p + 1, data, size);
cec_cmd.cmd_code = EC_CMD_FLASH_WRITE;
cec_cmd.cmd_version = burst == EC_FLASH_WRITE_VER0_SIZE ? 0 : EC_VER_FLASH_WRITE;
cec_cmd.cmd_data_in = buf;
cec_cmd.cmd_data_out = NULL;
cec_cmd.cmd_size_in = bufsize;
cec_cmd.cmd_size_out = 0;
cec_cmd.cmd_dev_index = 0;
return google_chromeec_command(&cec_cmd);
}
/*
* Query the EC for specified mask indicating enabled events.
* The EC maintains separate event masks for SMI, SCI and WAKE.
*/
static int google_chromeec_uhepi_cmd(uint8_t mask, uint8_t action,
uint64_t *value)
{
int ret;
struct ec_params_host_event req;
struct ec_response_host_event rsp;
struct chromeec_command cmd;
req.action = action;
req.mask_type = mask;
if (action != EC_HOST_EVENT_GET)
req.value = *value;
else
*value = 0;
cmd.cmd_code = EC_CMD_HOST_EVENT;
cmd.cmd_version = 0;
cmd.cmd_data_in = &req;
cmd.cmd_size_in = sizeof(req);
cmd.cmd_data_out = &rsp;
cmd.cmd_size_out = sizeof(rsp);
cmd.cmd_dev_index = 0;
ret = google_chromeec_command(&cmd);
if (action != EC_HOST_EVENT_GET)
return ret;
if (ret == 0)
*value = rsp.value;
return ret;
}
/**
* Return optimal flash write burst size
*/
int google_chromeec_flash_write_burst_size(void)
{
struct chromeec_command cec_cmd;
struct ec_response_flash_info info;
uint32_t pdata_max_size = EC_LPC_HOST_PACKET_SIZE - sizeof(struct ec_host_request) -
sizeof(struct ec_params_flash_write);
/*
* Determine whether we can use version 1 of the command with more
* data, or only version 0.
*/
if (!google_chromeec_cmd_version_supported(EC_CMD_FLASH_WRITE, EC_VER_FLASH_WRITE))
return EC_FLASH_WRITE_VER0_SIZE;
/*
* Determine step size. This must be a multiple of the write block
* size, and must also fit into the host parameter buffer.
*/
cec_cmd.cmd_code = EC_CMD_FLASH_INFO;
cec_cmd.cmd_version = 0;
cec_cmd.cmd_data_in = NULL;
cec_cmd.cmd_data_out = &info;
cec_cmd.cmd_size_in = 0;
cec_cmd.cmd_size_out = sizeof(info);
cec_cmd.cmd_dev_index = 0;
if (google_chromeec_command(&cec_cmd))
return -1;
return (pdata_max_size / info.write_block_size) *
info.write_block_size;
}
int google_chromeec_flash_offset(enum ec_flash_region region,
uint32_t *offset, uint32_t *size)
{
struct chromeec_command cec_cmd;
struct ec_params_flash_region_info p;
struct ec_response_flash_region_info r;
p.region = region;
/* Get offset and size */
cec_cmd.cmd_code = EC_CMD_FLASH_REGION_INFO;
cec_cmd.cmd_version = EC_VER_FLASH_REGION_INFO;
cec_cmd.cmd_data_in = &p;
cec_cmd.cmd_data_out = &r;
cec_cmd.cmd_size_in = sizeof(p);
cec_cmd.cmd_size_out = sizeof(r);
cec_cmd.cmd_dev_index = 0;
printk(BIOS_DEBUG, "Getting EC region info\n");
if (google_chromeec_command(&cec_cmd))
return -1;
if (offset)
*offset = r.offset;
if (size)
*size = r.size;
return 0;
}
/**
* Check if EC/TCPM is in an alternate mode or not.
*
* @param svid SVID of the alternate mode to check
* @return 0: Not in the mode. -1: Error. 1: Yes.
*/
int google_chromeec_pd_get_amode(uint16_t svid)
{
struct ec_response_usb_pd_ports r;
struct chromeec_command cmd;
int i;
cmd.cmd_code = EC_CMD_USB_PD_PORTS;
cmd.cmd_version = 0;
cmd.cmd_data_in = NULL;
cmd.cmd_size_in = 0;
cmd.cmd_data_out = &r;
cmd.cmd_size_out = sizeof(r);
cmd.cmd_dev_index = 0;
if (google_chromeec_command(&cmd) < 0)
return -1;
for (i = 0; i < r.num_ports; i++) {
struct ec_params_usb_pd_get_mode_request p;
struct ec_params_usb_pd_get_mode_response res;
int svid_idx = 0;
do {
/* Reset cmd in each iteration in case
google_chromeec_command changes it. */
p.port = i;
p.svid_idx = svid_idx;
cmd.cmd_code = EC_CMD_USB_PD_GET_AMODE;
cmd.cmd_version = 0;
cmd.cmd_data_in = &p;
cmd.cmd_size_in = sizeof(p);
cmd.cmd_data_out = &res;
cmd.cmd_size_out = sizeof(res);
cmd.cmd_dev_index = 0;
if (google_chromeec_command(&cmd) < 0)
return -1;
if (res.svid == svid)
return 1;
svid_idx++;
} while (res.svid);
}
return 0;
}
int google_chromeec_get_mkbp_event(struct ec_response_get_next_event *event)
{
struct chromeec_command cmd;
cmd.cmd_code = EC_CMD_GET_NEXT_EVENT;
cmd.cmd_version = 0;
cmd.cmd_data_in = NULL;
cmd.cmd_size_in = 0;
cmd.cmd_data_out = event;
cmd.cmd_size_out = sizeof(*event);
cmd.cmd_dev_index = 0;
return google_chromeec_command(&cmd);
}
u16 google_chromeec_get_board_version(void)
{
struct chromeec_command cmd;
struct ec_response_board_version board_v;
cmd.cmd_code = EC_CMD_GET_BOARD_VERSION;
cmd.cmd_version = 0;
cmd.cmd_size_in = 0;
cmd.cmd_size_out = sizeof(board_v);
cmd.cmd_data_out = &board_v;
if (google_chromeec_command(&cmd) != 0)
return 0;
return board_v.board_version;
}
static int google_chromeec_set_mask(u8 type, u32 mask)
{
struct ec_params_host_event_mask req;
struct ec_response_host_event_mask rsp;
struct chromeec_command cmd;
req.mask = mask;
cmd.cmd_code = type;
cmd.cmd_version = 0;
cmd.cmd_data_in = &req;
cmd.cmd_size_in = sizeof(req);
cmd.cmd_data_out = &rsp;
cmd.cmd_size_out = sizeof(rsp);
return google_chromeec_command(&cmd);
}
int google_chromeec_flash_erase(uint32_t offset, uint32_t size)
{
struct chromeec_command cec_cmd;
struct ec_params_flash_erase p;
p.offset = offset;
p.size = size;
/* Erase block of size at offset */
cec_cmd.cmd_code = EC_CMD_FLASH_ERASE;
cec_cmd.cmd_version = 0;
cec_cmd.cmd_data_in = &p;
cec_cmd.cmd_size_in = sizeof(p);
cec_cmd.cmd_dev_index = 0;
printk(BIOS_DEBUG, "Erasing EC RW region\n");
return google_chromeec_command(&cec_cmd);
}
int rtc_get(struct rtc_time *time)
{
struct chromeec_command cmd;
struct ec_response_rtc r;
cmd.cmd_code = EC_CMD_RTC_GET_VALUE;
cmd.cmd_version = 0;
cmd.cmd_size_in = 0;
cmd.cmd_data_out = &r;
cmd.cmd_size_out = sizeof(r);
cmd.cmd_dev_index = 0;
if (google_chromeec_command(&cmd) != 0)
return -1;
return rtc_to_tm(r.time, time);
}
/*
* Query the EC for specified mask indicating enabled events.
* The EC maintains separate event masks for SMI, SCI and WAKE.
*/
static u32 google_chromeec_get_mask(u8 type)
{
struct ec_params_host_event_mask req;
struct ec_response_host_event_mask rsp;
struct chromeec_command cmd;
cmd.cmd_code = type;
cmd.cmd_version = 0;
cmd.cmd_data_in = &req;
cmd.cmd_size_in = sizeof(req);
cmd.cmd_data_out = &rsp;
cmd.cmd_size_out = sizeof(rsp);
if (google_chromeec_command(&cmd) == 0)
return rsp.mask;
return 0;
}
int google_chromeec_set_usb_charge_mode(u8 port_id, enum usb_charge_mode mode)
{
struct chromeec_command cmd;
struct ec_params_usb_charge_set_mode set_mode = {
.usb_port_id = port_id,
.mode = mode,
};
cmd.cmd_code = EC_CMD_USB_CHARGE_SET_MODE;
cmd.cmd_version = 0;
cmd.cmd_size_in = sizeof(set_mode);
cmd.cmd_data_in = &set_mode;
cmd.cmd_size_out = 0;
cmd.cmd_data_out = NULL;
return google_chromeec_command(&cmd);
}
static
int google_chromeec_hello(void)
{
struct chromeec_command cec_cmd;
struct ec_params_hello cmd_hello;
struct ec_response_hello rsp_hello;
cmd_hello.in_data = 0x10203040;
cec_cmd.cmd_code = EC_CMD_HELLO;
cec_cmd.cmd_version = 0;
cec_cmd.cmd_data_in = &cmd_hello.in_data;
cec_cmd.cmd_data_out = &rsp_hello.out_data;
cec_cmd.cmd_size_in = sizeof(cmd_hello.in_data);
cec_cmd.cmd_size_out = sizeof(rsp_hello.out_data);
google_chromeec_command(&cec_cmd);
printk(BIOS_DEBUG, "Google Chrome EC: Hello got back %x status (%x)\n",
rsp_hello.out_data, cec_cmd.cmd_code);
return cec_cmd.cmd_code;
}
/* Set the current device event mask */
int google_chromeec_set_device_enabled_events(uint64_t mask)
{
struct ec_params_device_event req;
struct ec_response_device_event rsp;
struct chromeec_command cmd;
req.event_mask = (uint32_t)mask;
req.param = EC_DEVICE_EVENT_PARAM_SET_ENABLED_EVENTS;
cmd.cmd_code = EC_CMD_DEVICE_EVENT;
cmd.cmd_version = 0;
cmd.cmd_data_in = &req;
cmd.cmd_size_in = sizeof(req);
cmd.cmd_data_out = &rsp;
cmd.cmd_size_out = sizeof(rsp);
cmd.cmd_dev_index = 0;
return google_chromeec_command(&cmd);
}
/* Read and clear pending device events */
uint64_t google_chromeec_get_device_current_events(void)
{
struct ec_params_device_event req;
struct ec_response_device_event rsp;
struct chromeec_command cmd;
req.param = EC_DEVICE_EVENT_PARAM_GET_CURRENT_EVENTS;
cmd.cmd_code = EC_CMD_DEVICE_EVENT;
cmd.cmd_version = 0;
cmd.cmd_data_in = &req;
cmd.cmd_size_in = sizeof(req);
cmd.cmd_data_out = &rsp;
cmd.cmd_size_out = sizeof(rsp);
cmd.cmd_dev_index = 0;
if (google_chromeec_command(&cmd) == 0)
return rsp.event_mask;
return 0;
}
int google_chromeec_check_feature(int feature)
{
struct chromeec_command cmd;
struct ec_response_get_features r;
cmd.cmd_code = EC_CMD_GET_FEATURES;
cmd.cmd_version = 0;
cmd.cmd_size_in = 0;
cmd.cmd_data_out = &r;
cmd.cmd_size_out = sizeof(r);
cmd.cmd_dev_index = 0;
if (google_chromeec_command(&cmd) != 0)
return -1;
if (feature >= 8 * sizeof(r.flags))
return -1;
return r.flags[feature / 32] & EC_FEATURE_MASK_0(feature);
}
int google_chromeec_kbbacklight(int percent)
{
struct chromeec_command cec_cmd;
struct ec_params_pwm_set_keyboard_backlight cmd_backlight;
struct ec_response_pwm_get_keyboard_backlight rsp_backlight;
/* if they were dumb, help them out */
percent = percent % 101;
cec_cmd.cmd_code = EC_CMD_PWM_SET_KEYBOARD_BACKLIGHT;
cec_cmd.cmd_version = 0;
cmd_backlight.percent = percent;
cec_cmd.cmd_data_in = &cmd_backlight;
cec_cmd.cmd_data_out = &rsp_backlight;
cec_cmd.cmd_size_in = sizeof(cmd_backlight);
cec_cmd.cmd_size_out = sizeof(rsp_backlight);
google_chromeec_command(&cec_cmd);
printk(BIOS_DEBUG, "Google Chrome set keyboard backlight: %x status (%x)\n",
rsp_backlight.percent, cec_cmd.cmd_code);
return cec_cmd.cmd_code;
}
/**
* Get the versions of the command supported by the EC.
*
* @param cmd Command
* @param pmask Destination for version mask; will be set to 0 on
* error.
* @return 0 if success, <0 if error
*/
int google_chromeec_get_cmd_versions(int cmd, uint32_t *pmask)
{
struct chromeec_command cec_cmd;
struct ec_params_get_cmd_versions p;
struct ec_response_get_cmd_versions r;
*pmask = 0;
p.cmd = cmd;
/* Get command versions */
cec_cmd.cmd_code = EC_CMD_GET_CMD_VERSIONS;
cec_cmd.cmd_version = 0;
cec_cmd.cmd_data_in = &p;
cec_cmd.cmd_data_out = &r;
cec_cmd.cmd_size_in = sizeof(p);
cec_cmd.cmd_size_out = sizeof(r);
cec_cmd.cmd_dev_index = 0;
if (google_chromeec_command(&cec_cmd))
return -1;
*pmask = r.version_mask;
return 0;
}
int google_chromeec_set_sku_id(u32 skuid)
{
struct chromeec_command cmd;
struct ec_sku_id_info set_skuid = {
.sku_id = skuid
};
cmd.cmd_code = EC_CMD_SET_SKU_ID;
cmd.cmd_version = 0;
cmd.cmd_size_in = sizeof(set_skuid);
cmd.cmd_data_in = &set_skuid;
cmd.cmd_data_out = NULL;
cmd.cmd_size_out = 0;
cmd.cmd_dev_index = 0;
if (google_chromeec_command(&cmd) != 0)
return -1;
return 0;
}
int google_chromeec_vbnv_context(int is_read, uint8_t *data, int len)
{
struct chromeec_command cec_cmd;
struct ec_params_vbnvcontext cmd_vbnvcontext;
struct ec_response_vbnvcontext rsp_vbnvcontext;
int retries = 3;
if (len != EC_VBNV_BLOCK_SIZE)
return -1;
retry:
cec_cmd.cmd_code = EC_CMD_VBNV_CONTEXT;
cec_cmd.cmd_version = EC_VER_VBNV_CONTEXT;
cec_cmd.cmd_data_in = &cmd_vbnvcontext;
cec_cmd.cmd_data_out = &rsp_vbnvcontext;
cec_cmd.cmd_size_in = sizeof(cmd_vbnvcontext);
cec_cmd.cmd_size_out = is_read ? sizeof(rsp_vbnvcontext) : 0;
cec_cmd.cmd_dev_index = 0;
cmd_vbnvcontext.op = is_read ? EC_VBNV_CONTEXT_OP_READ :
EC_VBNV_CONTEXT_OP_WRITE;
if (!is_read)
memcpy(&cmd_vbnvcontext.block, data, EC_VBNV_BLOCK_SIZE);
if (google_chromeec_command(&cec_cmd)) {
printk(BIOS_ERR, "ERROR: failed to %s vbnv_ec context: %d\n",
is_read ? "read" : "write", (int)cec_cmd.cmd_code);
mdelay(10); /* just in case */
if (--retries)
goto retry;
}
if (is_read)
memcpy(data, &rsp_vbnvcontext.block, EC_VBNV_BLOCK_SIZE);
return cec_cmd.cmd_code;
}
/* Find the last port80 code from the previous boot */
static u16 google_chromeec_get_port80_last_boot(void)
{
struct ec_response_port80_last_boot rsp;
struct chromeec_command cmd = {
.cmd_code = EC_CMD_PORT80_LAST_BOOT,
.cmd_data_out = &rsp,
.cmd_size_out = sizeof(rsp),
};
/* Get last port80 code */
if (google_chromeec_command(&cmd) == 0)
return rsp.code;
return 0;
}
#endif
void google_chromeec_log_events(u32 mask)
{
#if CONFIG_ELOG
u8 event;
u16 code;
/* Find the last port80 code */
code = google_chromeec_get_port80_last_boot();
/* Log the last post code only if it is abornmal */
if (code > 0 && code != POST_OS_BOOT && code != POST_OS_RESUME)
printk(BIOS_DEBUG, "Chrome EC: Last POST code was 0x%02x\n",
code);
while ((event = google_chromeec_get_event()) != 0) {
if (EC_HOST_EVENT_MASK(event) & mask)
elog_add_event_byte(ELOG_TYPE_EC_EVENT, event);
}
#endif
}
int google_chromeec_i2c_xfer(uint8_t chip, uint8_t addr, int alen,
uint8_t *buffer, int len, int is_read)
{
union {
struct ec_params_i2c_passthru p;
uint8_t outbuf[EC_HOST_PARAM_SIZE];
} params;
union {
struct ec_response_i2c_passthru r;
uint8_t inbuf[EC_HOST_PARAM_SIZE];
} response;
struct ec_params_i2c_passthru *p = ¶ms.p;
struct ec_response_i2c_passthru *r = &response.r;
struct ec_params_i2c_passthru_msg *msg = p->msg;
struct chromeec_command cmd;
uint8_t *pdata;
int read_len, write_len;
int size;
int rv;
p->port = 0;
if (alen != 1) {
printk(BIOS_ERR, "Unsupported address length %d\n", alen);
return -1;
}
if (is_read) {
read_len = len;
write_len = alen;
p->num_msgs = 2;
} else {
read_len = 0;
write_len = alen + len;
p->num_msgs = 1;
}
size = sizeof(*p) + p->num_msgs * sizeof(*msg);
if (size + write_len > sizeof(params)) {
printk(BIOS_ERR, "Params too large for buffer\n");
return -1;
}
if (sizeof(*r) + read_len > sizeof(response)) {
printk(BIOS_ERR, "Read length too big for buffer\n");
return -1;
}
/* Create a message to write the register address and optional data */
pdata = (uint8_t *)p + size;
msg->addr_flags = chip;
msg->len = write_len;
pdata[0] = addr;
if (!is_read)
memcpy(pdata + 1, buffer, len);
msg++;
if (read_len) {
msg->addr_flags = chip | EC_I2C_FLAG_READ;
msg->len = read_len;
}
cmd.cmd_code = EC_CMD_I2C_PASSTHRU;
cmd.cmd_version = 0;
cmd.cmd_data_in = p;
cmd.cmd_size_in = size + write_len;
cmd.cmd_data_out = r;
cmd.cmd_size_out = sizeof(*r) + read_len;
rv = google_chromeec_command(&cmd);
if (rv != 0)
return rv;
/* Parse response */
if (r->i2c_status & EC_I2C_STATUS_ERROR) {
printk(BIOS_ERR, "Transfer failed with status=0x%x\n",
r->i2c_status);
return -1;
}
if (cmd.cmd_size_out < sizeof(*r) + read_len) {
printk(BIOS_ERR, "Truncated read response\n");
return -1;
}
if (read_len)
memcpy(buffer, r->data, read_len);
return 0;
}
int google_chromeec_reboot(int dev_idx, enum ec_reboot_cmd type, uint8_t flags)
{
struct ec_params_reboot_ec reboot_ec = {
.cmd = type,
.flags = flags,
};
struct ec_response_get_version cec_resp = { };
struct chromeec_command cec_cmd = {
.cmd_code = EC_CMD_REBOOT_EC,
.cmd_version = 0,
.cmd_data_in = &reboot_ec,
.cmd_data_out = &cec_resp,
.cmd_size_in = sizeof(reboot_ec),
.cmd_size_out = 0, /* ignore response, if any */
.cmd_dev_index = dev_idx,
};
return google_chromeec_command(&cec_cmd);
}
static int cbi_get_uint32(uint32_t *id, uint32_t tag)
{
struct chromeec_command cmd;
struct ec_params_get_cbi p;
uint32_t r = 0;
int rv;
p.tag = tag;
cmd.cmd_code = EC_CMD_GET_CROS_BOARD_INFO;
cmd.cmd_version = 0;
cmd.cmd_data_in = &p;
cmd.cmd_data_out = &r;
cmd.cmd_size_in = sizeof(p);
cmd.cmd_size_out = sizeof(r);
cmd.cmd_dev_index = 0;
rv = google_chromeec_command(&cmd);
if (rv < 0)
return rv;
*id = r;
return 0;
}
int google_chromeec_cbi_get_sku_id(uint32_t *id)
{
return cbi_get_uint32(id, CBI_TAG_SKU_ID);
}
int google_chromeec_cbi_get_oem_id(uint32_t *id)
{
return cbi_get_uint32(id, CBI_TAG_OEM_ID);
}
static int cbi_get_string(char *buf, size_t bufsize, uint32_t tag)
{
struct ec_params_get_cbi p = {
.tag = tag,
};
struct chromeec_command cmd = {
.cmd_code = EC_CMD_GET_CROS_BOARD_INFO,
.cmd_version = 0,
.cmd_data_in = &p,
.cmd_data_out = buf,
.cmd_size_in = sizeof(p),
.cmd_size_out = bufsize,
};
int rv;
rv = google_chromeec_command(&cmd);
if (rv < 0)
return rv;
/* Ensure NUL termination. */
buf[bufsize - 1] = '\0';
return 0;
}
int google_chromeec_cbi_get_dram_part_num(char *buf, size_t bufsize)
{
return cbi_get_string(buf, bufsize, CBI_TAG_DRAM_PART_NUM);
}
int google_chromeec_cbi_get_oem_name(char *buf, size_t bufsize)
{
return cbi_get_string(buf, bufsize, CBI_TAG_OEM_NAME);
}
int google_chromeec_get_board_version(uint32_t *version)
{
struct chromeec_command cmd;
struct ec_response_board_version board_v;
cmd.cmd_code = EC_CMD_GET_BOARD_VERSION;
cmd.cmd_version = 0;
cmd.cmd_size_in = 0;
cmd.cmd_size_out = sizeof(board_v);
cmd.cmd_data_out = &board_v;
cmd.cmd_dev_index = 0;
if (google_chromeec_command(&cmd))
return -1;
*version = board_v.board_version;
return 0;
}
u32 google_chromeec_get_sku_id(void)
{
struct chromeec_command cmd;
struct ec_sku_id_info sku_v;
cmd.cmd_code = EC_CMD_GET_SKU_ID;
cmd.cmd_version = 0;
cmd.cmd_size_in = 0;
cmd.cmd_size_out = sizeof(sku_v);
cmd.cmd_data_out = &sku_v;
cmd.cmd_dev_index = 0;
if (google_chromeec_command(&cmd) != 0)
return 0;
return sku_v.sku_id;
}
int google_chromeec_vbnv_context(int is_read, uint8_t *data, int len)
{
struct chromeec_command cec_cmd;
struct ec_params_vbnvcontext cmd_vbnvcontext;
struct ec_response_vbnvcontext rsp_vbnvcontext;
int retries = 3;
if (len != EC_VBNV_BLOCK_SIZE)
return -1;
retry:
cec_cmd.cmd_code = EC_CMD_VBNV_CONTEXT;
cec_cmd.cmd_version = EC_VER_VBNV_CONTEXT;
cec_cmd.cmd_data_in = &cmd_vbnvcontext;
cec_cmd.cmd_data_out = &rsp_vbnvcontext;
cec_cmd.cmd_size_in = sizeof(cmd_vbnvcontext);
cec_cmd.cmd_size_out = is_read ? sizeof(rsp_vbnvcontext) : 0;
cec_cmd.cmd_dev_index = 0;
cmd_vbnvcontext.op = is_read ? EC_VBNV_CONTEXT_OP_READ :
EC_VBNV_CONTEXT_OP_WRITE;
if (!is_read)
memcpy(&cmd_vbnvcontext.block, data, EC_VBNV_BLOCK_SIZE);
if (google_chromeec_command(&cec_cmd)) {
printk(BIOS_ERR, "ERROR: failed to %s vbnv_ec context: %d\n",
is_read ? "read" : "write", (int)cec_cmd.cmd_code);
mdelay(10); /* just in case */
if (--retries)
goto retry;
}
if (is_read)
memcpy(data, &rsp_vbnvcontext.block, EC_VBNV_BLOCK_SIZE);
return cec_cmd.cmd_code;
}
#ifndef __PRE_RAM__
int google_chromeec_i2c_xfer(uint8_t chip, uint8_t addr, int alen,
uint8_t *buffer, int len, int is_read)
{
union {
struct ec_params_i2c_passthru p;
uint8_t outbuf[EC_HOST_PARAM_SIZE];
} params;
union {
struct ec_response_i2c_passthru r;
uint8_t inbuf[EC_HOST_PARAM_SIZE];
} response;
struct ec_params_i2c_passthru *p = ¶ms.p;
struct ec_response_i2c_passthru *r = &response.r;
struct ec_params_i2c_passthru_msg *msg = p->msg;
struct chromeec_command cmd;
uint8_t *pdata;
int read_len, write_len;
int size;
int rv;
p->port = 0;
if (alen != 1) {
printk(BIOS_ERR, "Unsupported address length %d\n", alen);
return -1;
}
if (is_read) {
read_len = len;
write_len = alen;
p->num_msgs = 2;
} else {
read_len = 0;
write_len = alen + len;
p->num_msgs = 1;
}
size = sizeof(*p) + p->num_msgs * sizeof(*msg);
if (size + write_len > sizeof(params)) {
printk(BIOS_ERR, "Params too large for buffer\n");
return -1;
}
if (sizeof(*r) + read_len > sizeof(response)) {
printk(BIOS_ERR, "Read length too big for buffer\n");
return -1;
}
/* Create a message to write the register address and optional data */
pdata = (uint8_t *)p + size;
msg->addr_flags = chip;
msg->len = write_len;
pdata[0] = addr;
if (!is_read)
memcpy(pdata + 1, buffer, len);
msg++;
if (read_len) {
msg->addr_flags = chip | EC_I2C_FLAG_READ;
msg->len = read_len;
}
cmd.cmd_code = EC_CMD_I2C_PASSTHRU;
cmd.cmd_version = 0;
cmd.cmd_data_in = p;
cmd.cmd_size_in = size + write_len;
cmd.cmd_data_out = r;
cmd.cmd_size_out = sizeof(*r) + read_len;
cmd.cmd_dev_index = 0;
rv = google_chromeec_command(&cmd);
if (rv != 0)
return rv;
/* Parse response */
if (r->i2c_status & EC_I2C_STATUS_ERROR) {
printk(BIOS_ERR, "Transfer failed with status=0x%x\n",
r->i2c_status);
return -1;
}
if (cmd.cmd_size_out < sizeof(*r) + read_len) {
printk(BIOS_ERR, "Truncated read response\n");
return -1;
}
if (read_len)
memcpy(buffer, r->data, read_len);
return 0;
}
int google_chromeec_set_sci_mask(uint64_t mask)
{
printk(BIOS_DEBUG, "Chrome EC: Set SCI mask to 0x%016llx\n", mask);
return google_chromeec_set_mask(EC_HOST_EVENT_SCI_MASK, mask);
}
int google_chromeec_set_smi_mask(uint64_t mask)
{
printk(BIOS_DEBUG, "Chrome EC: Set SMI mask to 0x%016llx\n", mask);
return google_chromeec_set_mask(EC_HOST_EVENT_SMI_MASK, mask);
}
/* Get charger power info in Watts. Also returns type of charger */
int google_chromeec_get_usb_pd_power_info(enum usb_chg_type *type,
u32 *max_watts)
{
struct ec_params_usb_pd_power_info req = {
.port = PD_POWER_CHARGING_PORT,
};
struct ec_response_usb_pd_power_info rsp;
struct chromeec_command cmd = {
.cmd_code = EC_CMD_USB_PD_POWER_INFO,
.cmd_version = 0,
.cmd_data_in = &req,
.cmd_size_in = sizeof(req),
.cmd_data_out = &rsp,
.cmd_size_out = sizeof(rsp),
.cmd_dev_index = 0,
};
struct usb_chg_measures m;
int rv = google_chromeec_command(&cmd);
if (rv != 0)
return rv;
/* values are given in milliAmps and milliVolts */
*type = rsp.type;
m = rsp.meas;
*max_watts = (m.current_max * m.voltage_max) / 1000000;
return 0;
}
int google_chromeec_override_dedicated_charger_limit(u16 current_lim,
u16 voltage_lim)
{
struct ec_params_dedicated_charger_limit p = {
.current_lim = current_lim,
.voltage_lim = voltage_lim,
};
struct chromeec_command cmd = {
.cmd_code = EC_CMD_OVERRIDE_DEDICATED_CHARGER_LIMIT,
.cmd_version = 0,
.cmd_data_in = &p,
.cmd_size_in = sizeof(p),
.cmd_data_out = NULL,
.cmd_size_out = 0,
.cmd_dev_index = 0,
};
return google_chromeec_command(&cmd);
}
int google_chromeec_set_usb_pd_role(u8 port, enum usb_pd_control_role role)
{
struct ec_params_usb_pd_control req = {
.port = port,
.role = role,
.mux = USB_PD_CTRL_MUX_NO_CHANGE,
.swap = USB_PD_CTRL_SWAP_NONE,
};
struct ec_response_usb_pd_control rsp;
struct chromeec_command cmd = {
.cmd_code = EC_CMD_USB_PD_CONTROL,
.cmd_version = 0,
.cmd_data_in = &req,
.cmd_size_in = sizeof(req),
.cmd_data_out = &rsp,
.cmd_size_out = sizeof(rsp),
.cmd_dev_index = 0,
};
return google_chromeec_command(&cmd);
}
static int google_chromeec_hello(void)
{
struct chromeec_command cec_cmd;
struct ec_params_hello cmd_hello;
struct ec_response_hello rsp_hello;
cmd_hello.in_data = 0x10203040;
cec_cmd.cmd_code = EC_CMD_HELLO;
cec_cmd.cmd_version = 0;
cec_cmd.cmd_data_in = &cmd_hello.in_data;
cec_cmd.cmd_data_out = &rsp_hello.out_data;
cec_cmd.cmd_size_in = sizeof(cmd_hello.in_data);
cec_cmd.cmd_size_out = sizeof(rsp_hello.out_data);
cec_cmd.cmd_dev_index = 0;
google_chromeec_command(&cec_cmd);
printk(BIOS_DEBUG, "Google Chrome EC: Hello got back %x status (%x)\n",
rsp_hello.out_data, cec_cmd.cmd_code);
return cec_cmd.cmd_code;
}
/* Cached EC image type (ro or rw). */
static int ec_image_type = EC_IMAGE_UNKNOWN;
static void google_chromeec_get_version(void)
{
struct chromeec_command cec_cmd;
struct ec_response_get_version cec_resp;
cec_cmd.cmd_code = EC_CMD_GET_VERSION;
cec_cmd.cmd_version = 0;
cec_cmd.cmd_data_in = 0;
cec_cmd.cmd_data_out = &cec_resp;
cec_cmd.cmd_size_in = 0;
cec_cmd.cmd_size_out = sizeof(cec_resp);
cec_cmd.cmd_dev_index = 0;
google_chromeec_command(&cec_cmd);
if (cec_cmd.cmd_code) {
printk(BIOS_DEBUG,
"Google Chrome EC: version command failed!\n");
} else {
printk(BIOS_DEBUG, "Google Chrome EC: version:\n");
printk(BIOS_DEBUG, " ro: %s\n", cec_resp.version_string_ro);
printk(BIOS_DEBUG, " rw: %s\n", cec_resp.version_string_rw);
printk(BIOS_DEBUG, " running image: %d\n",
cec_resp.current_image);
ec_image_type = cec_resp.current_image;
}
}
void google_chromeec_init(void)
{
printk(BIOS_DEBUG, "Google Chrome EC: Initializing\n");
google_chromeec_hello();
/* Get version to check which EC image is active */
google_chromeec_get_version();
/* Check/update EC RW image if needed */
if (google_chromeec_swsync()) {
printk(BIOS_ERR, "ChromeEC: EC SW SYNC FAILED\n");
} else if (ec_image_type != EC_IMAGE_RW) {
/* EC RW image is up to date, switch to it if not already*/
google_chromeec_reboot(0, EC_REBOOT_JUMP_RW, 0);
mdelay(100);
/* Use Hello cmd to "reset" EC now in RW mode */
google_chromeec_hello();
/* re-run version command & print */
google_chromeec_get_version();
}
}
int google_ec_running_ro(void)
{
return (ec_image_type == EC_IMAGE_RO);
}
void google_chromeec_reboot_ro(void)
{
/* Reboot the EC and make it come back in RO mode */
printk(BIOS_DEBUG, "Rebooting with EC in RO mode:\n");
post_code(0); /* clear current post code */
google_chromeec_reboot(0, EC_REBOOT_COLD, 0);
udelay(1000);
board_reset();
halt();
}
/* Timeout waiting for EC hash calculation completion */
static const int CROS_EC_HASH_TIMEOUT_MS = 2000;
/* Time to delay between polling status of EC hash calculation */
static const int CROS_EC_HASH_CHECK_DELAY_MS = 10;
int google_chromeec_swsync(void)
{
static struct ec_response_vboot_hash resp;
uint8_t *ec_hash;
int ec_hash_size;
uint8_t *ecrw_hash, *ecrw;
int need_update = 0, i;
size_t ecrw_size;
/* skip if on S3 resume path */
if (acpi_is_wakeup_s3())
return 0;
/* Get EC_RW hash from CBFS */
ecrw_hash = cbfs_boot_map_with_leak("ecrw.hash", CBFS_TYPE_RAW, NULL);
if (!ecrw_hash) {
/* Assume no EC update file for this board */
printk(BIOS_DEBUG, "ChromeEC SW Sync: no EC_RW update available\n");
return 0;
}
/* Got an expected hash */
printk(BIOS_DEBUG, "ChromeEC SW Sync: Expected hash: ");
for (i = 0; i < SHA256_DIGEST_SIZE; i++)
printk(BIOS_DEBUG, "%02x", ecrw_hash[i]);
printk(BIOS_DEBUG, "\n");
/* Get hash of current EC-RW */
if (google_chromeec_read_hash(&resp)) {
printk(BIOS_ERR, "Failed to read current EC_RW hash.\n");
return -1;
}
ec_hash = resp.hash_digest;
ec_hash_size = resp.digest_size;
/* Check hash size */
if (ec_hash_size != SHA256_DIGEST_SIZE) {
printk(BIOS_ERR, "ChromeEC SW Sync: - "
"read_hash says size %d, not %d\n",
ec_hash_size, SHA256_DIGEST_SIZE);
return -1;
}
/* We got a proper hash */
printk(BIOS_DEBUG, "ChromeEC SW Sync: current EC_RW hash: ");
for (i = 0; i < SHA256_DIGEST_SIZE; i++)
printk(BIOS_DEBUG, "%02x", ec_hash[i]);
printk(BIOS_DEBUG, "\n");
/* compare hashes */
need_update = SafeMemcmp(ec_hash, ecrw_hash, SHA256_DIGEST_SIZE);
/* If in RW and need to update, return/reboot to RO */
if (need_update && ec_image_type == EC_IMAGE_RW) {
printk(BIOS_DEBUG, "ChromeEC SW Sync: EC_RW needs update but in RW; rebooting to RO\n");
google_chromeec_reboot_ro();
return -1;
}
/* Update EC if necessary */
if (need_update) {
printk(BIOS_DEBUG, "ChromeEC SW Sync: updating EC_RW...\n");
/* Get ecrw image from CBFS */
ecrw = cbfs_boot_map_with_leak("ecrw", CBFS_TYPE_RAW, &ecrw_size);
if (!ecrw) {
printk(BIOS_ERR, "ChromeEC SW Sync: no ecrw image found in CBFS; cannot update\n");
return -1;
}
if (google_chromeec_flash_update_rw(ecrw, ecrw_size)) {
printk(BIOS_ERR, "ChromeEC SW Sync: Failed to update EC_RW.\n");
return -1;
}
/* Have EC recompute hash for new EC_RW block */
if (google_chromeec_read_hash(&resp) ) {
printk(BIOS_ERR, "ChromeEC SW Sync: Failed to read new EC_RW hash.\n");
return -1;
}
/* Compare new EC_RW hash to value from CBFS */
ec_hash = resp.hash_digest;
if(SafeMemcmp(ec_hash, ecrw_hash, SHA256_DIGEST_SIZE)) {
/* hash mismatch! */
printk(BIOS_DEBUG, "ChromeEC SW Sync: Expected hash: ");
for (i = 0; i < SHA256_DIGEST_SIZE; i++)
printk(BIOS_DEBUG, "%02x", ecrw_hash[i]);
printk(BIOS_DEBUG, "\n");
printk(BIOS_DEBUG, "ChromeEC SW Sync: EC hash: ");
for (i = 0; i < SHA256_DIGEST_SIZE; i++)
printk(BIOS_DEBUG, "%02x", ec_hash[i]);
printk(BIOS_DEBUG, "\n");
return -1;
}
printk(BIOS_DEBUG, "ChromeEC SW Sync: EC_RW hashes match\n");
printk(BIOS_DEBUG, "ChromeEC SW Sync: done\n");
} else {
printk(BIOS_DEBUG, "ChromeEC SW Sync: EC_RW is up to date\n");
}
return 0;
}
int google_chromeec_read_hash(struct ec_response_vboot_hash *hash)
{
struct chromeec_command cec_cmd;
struct ec_params_vboot_hash p;
int recalc_requested = 0;
uint64_t start = timer_us(0);
do {
/* Get hash if available. */
p.cmd = EC_VBOOT_HASH_GET;
cec_cmd.cmd_code = EC_CMD_VBOOT_HASH;
cec_cmd.cmd_version = 0;
cec_cmd.cmd_data_in = &p;
cec_cmd.cmd_data_out = hash;
cec_cmd.cmd_size_in = sizeof(p);
cec_cmd.cmd_size_out = sizeof(*hash);
cec_cmd.cmd_dev_index = 0;
printk(BIOS_DEBUG, "ChromeEC: Getting hash:\n");
if (google_chromeec_command(&cec_cmd))
return -1;
switch (hash->status) {
case EC_VBOOT_HASH_STATUS_NONE:
/* We have no valid hash - let's request a recalc
* if we haven't done so yet. */
if (recalc_requested != 0) {
mdelay(CROS_EC_HASH_CHECK_DELAY_MS);
break;
}
printk(BIOS_DEBUG, "ChromeEC: No valid hash (status=%d size=%d). "
"Compute one...\n", hash->status, hash->size);
p.cmd = EC_VBOOT_HASH_RECALC;
p.hash_type = EC_VBOOT_HASH_TYPE_SHA256;
p.nonce_size = 0;
p.offset = EC_VBOOT_HASH_OFFSET_RW;
p.size = 0;
cec_cmd.cmd_code = EC_CMD_VBOOT_HASH;
cec_cmd.cmd_version = 0;
cec_cmd.cmd_data_in = &p;
cec_cmd.cmd_data_out = hash;
cec_cmd.cmd_size_in = sizeof(p);
cec_cmd.cmd_size_out = sizeof(*hash);
cec_cmd.cmd_dev_index = 0;
printk(BIOS_DEBUG, "ChromeEC: Starting EC hash:\n");
if (google_chromeec_command(&cec_cmd))
return -1;
recalc_requested = 1;
/* Command will wait to return until hash is done/ready */
break;
case EC_VBOOT_HASH_STATUS_BUSY:
/* Hash is still calculating. */
mdelay(CROS_EC_HASH_CHECK_DELAY_MS);
break;
case EC_VBOOT_HASH_STATUS_DONE:
default:
/* We have a valid hash. */
break;
}
} while (hash->status != EC_VBOOT_HASH_STATUS_DONE &&
timer_us(start) < CROS_EC_HASH_TIMEOUT_MS * 1000);
if (hash->status != EC_VBOOT_HASH_STATUS_DONE) {
printk(BIOS_DEBUG, "ChromeEC: Hash status not done: %d\n", hash->status);
return -1;
}
return 0;
}
int google_chromeec_flash_update_rw(const uint8_t *image, int image_size)
{
uint32_t rw_offset, rw_size;
int ret;
/* get max size that can be written, offset to write */
if (google_chromeec_flash_offset(EC_FLASH_REGION_RW, &rw_offset, &rw_size))
return -1;
if (image_size > rw_size)
return -1;
/*
* Erase the entire RW section, so that the EC doesn't see any garbage
* past the new image if it's smaller than the current image.
*
*/
ret = google_chromeec_flash_erase(rw_offset, rw_size);
if (ret)
return ret;
/* Write the image */
return(google_chromeec_flash_write(image, rw_offset, image_size));
}
