static int cros_ec_check_version(struct cros_ec_dev *dev)
{
struct ec_params_hello req;
struct ec_response_hello *resp;
struct dm_cros_ec_ops *ops;
int ret;
ops = dm_cros_ec_get_ops(dev->dev);
if (ops->check_version) {
ret = ops->check_version(dev->dev);
if (ret)
return ret;
}
/*
* TODO([email protected]).
* There is a strange oddity here with the EC. We could just ignore
* the response, i.e. pass the last two parameters as NULL and 0.
* In this case we won't read back very many bytes from the EC.
* On the I2C bus the EC gets upset about this and will try to send
* the bytes anyway. This means that we will have to wait for that
* to complete before continuing with a new EC command.
*
* This problem is probably unique to the I2C bus.
*
* So for now, just read all the data anyway.
*/
/* Try sending a version 3 packet */
dev->protocol_version = 3;
req.in_data = 0;
if (ec_command_inptr(dev, EC_CMD_HELLO, 0, &req, sizeof(req),
(uint8_t **)&resp, sizeof(*resp)) > 0) {
return 0;
}
/* Try sending a version 2 packet */
dev->protocol_version = 2;
if (ec_command_inptr(dev, EC_CMD_HELLO, 0, &req, sizeof(req),
(uint8_t **)&resp, sizeof(*resp)) > 0) {
return 0;
}
/*
* Fail if we're still here, since the EC doesn't understand any
* protcol version we speak. Version 1 interface without command
* version is no longer supported, and we don't know about any new
* protocol versions.
*/
dev->protocol_version = 0;
printf("%s: ERROR: old EC interface not supported\n", __func__);
return -1;
}
int cros_ec_reboot(struct cros_ec_dev *dev, enum ec_reboot_cmd cmd,
uint8_t flags)
{
struct ec_params_reboot_ec p;
p.cmd = cmd;
p.flags = flags;
if (ec_command_inptr(dev, EC_CMD_REBOOT_EC, 0, &p, sizeof(p), NULL, 0)
< 0)
return -1;
if (!(flags & EC_REBOOT_FLAG_ON_AP_SHUTDOWN)) {
/*
* EC reboot will take place immediately so delay to allow it
* to complete. Note that some reboot types (EC_REBOOT_COLD)
* will reboot the AP as well, in which case we won't actually
* get to this point.
*/
/*
* TODO([email protected]): Would be nice if we had a
* better way to determine when the reboot is complete. Could
* we poll a memory-mapped LPC value?
*/
udelay(50000);
}
return 0;
}
int cros_ec_read_id(struct udevice *dev, char *id, int maxlen)
{
struct ec_response_get_version *r;
int ret;
ret = ec_command_inptr(dev, EC_CMD_GET_VERSION, 0, NULL, 0,
(uint8_t **)&r, sizeof(*r));
if (ret != sizeof(*r)) {
log_err("Got rc %d, expected %u\n", ret, (uint)sizeof(*r));
return -1;
}
if (maxlen > (int)sizeof(r->version_string_ro))
maxlen = sizeof(r->version_string_ro);
switch (r->current_image) {
case EC_IMAGE_RO:
memcpy(id, r->version_string_ro, maxlen);
break;
case EC_IMAGE_RW:
memcpy(id, r->version_string_rw, maxlen);
break;
default:
log_err("Invalid EC image %d\n", r->current_image);
return -1;
}
id[maxlen - 1] = '\0';
return 0;
}
int cros_ec_read_id(struct cros_ec_dev *dev, char *id, int maxlen)
{
struct ec_response_get_version *r;
if (ec_command_inptr(dev, EC_CMD_GET_VERSION, 0, NULL, 0,
(uint8_t **)&r, sizeof(*r)) != sizeof(*r))
return -1;
if (maxlen > (int)sizeof(r->version_string_ro))
maxlen = sizeof(r->version_string_ro);
switch (r->current_image) {
case EC_IMAGE_RO:
memcpy(id, r->version_string_ro, maxlen);
break;
case EC_IMAGE_RW:
memcpy(id, r->version_string_rw, maxlen);
break;
default:
return -1;
}
id[maxlen - 1] = '\0';
return 0;
}
int cros_ec_read_build_info(struct cros_ec_dev *dev, char **strp)
{
if (ec_command_inptr(dev, EC_CMD_GET_BUILD_INFO, 0, NULL, 0,
(uint8_t **)strp, EC_PROTO2_MAX_PARAM_SIZE) < 0)
return -1;
return 0;
}
int cros_ec_flash_erase(struct cros_ec_dev *dev, uint32_t offset, uint32_t size)
{
struct ec_params_flash_erase p;
p.offset = offset;
p.size = size;
return ec_command_inptr(dev, EC_CMD_FLASH_ERASE, 0, &p, sizeof(p),
NULL, 0);
}
int cros_ec_read_version(struct cros_ec_dev *dev,
struct ec_response_get_version **versionp)
{
if (ec_command_inptr(dev, EC_CMD_GET_VERSION, 0, NULL, 0,
(uint8_t **)versionp, sizeof(**versionp))
!= sizeof(**versionp))
return -1;
return 0;
}
int cros_ec_read_current_image(struct cros_ec_dev *dev,
enum ec_current_image *image)
{
struct ec_response_get_version *r;
if (ec_command_inptr(dev, EC_CMD_GET_VERSION, 0, NULL, 0,
(uint8_t **)&r, sizeof(*r)) != sizeof(*r))
return -1;
*image = r->current_image;
return 0;
}
int cros_ec_set_ldo(struct udevice *dev, uint8_t index, uint8_t state)
{
struct ec_params_ldo_set params;
params.index = index;
params.state = state;
if (ec_command_inptr(dev, EC_CMD_LDO_SET, 0, ¶ms, sizeof(params),
NULL, 0))
return -1;
return 0;
}
/**
* 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 dev CROS-EC device
* @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
*/
static int cros_ec_flash_write_block(struct cros_ec_dev *dev,
const uint8_t *data, uint32_t offset, uint32_t size)
{
struct ec_params_flash_write p;
p.offset = offset;
p.size = size;
assert(data && p.size <= EC_FLASH_WRITE_VER0_SIZE);
memcpy(&p + 1, data, p.size);
return ec_command_inptr(dev, EC_CMD_FLASH_WRITE, 0,
&p, sizeof(p), NULL, 0) >= 0 ? 0 : -1;
}
int cros_ec_write_vbnvcontext(struct cros_ec_dev *dev, const uint8_t *block)
{
struct ec_params_vbnvcontext p;
int len;
p.op = EC_VBNV_CONTEXT_OP_WRITE;
memcpy(p.block, block, sizeof(p.block));
len = ec_command_inptr(dev, EC_CMD_VBNV_CONTEXT, EC_VER_VBNV_CONTEXT,
&p, sizeof(p), NULL, 0);
if (len < 0)
return -1;
return 0;
}
int cros_ec_get_ldo(struct cros_ec_dev *dev, uint8_t index, uint8_t *state)
{
struct ec_params_ldo_get params;
struct ec_response_ldo_get *resp;
params.index = index;
if (ec_command_inptr(dev, EC_CMD_LDO_GET, 0,
¶ms, sizeof(params),
(uint8_t **)&resp, sizeof(*resp)) != sizeof(*resp))
return -1;
*state = resp->state;
return 0;
}
int cros_ec_clear_host_events(struct cros_ec_dev *dev, uint32_t events)
{
struct ec_params_host_event_mask params;
params.mask = events;
/*
* Use the B copy of the event flags, so it affects the data returned
* by cros_ec_get_host_events().
*/
if (ec_command_inptr(dev, EC_CMD_HOST_EVENT_CLEAR_B, 0,
¶ms, sizeof(params), NULL, 0) < 0)
return -1;
return 0;
}
int cros_ec_write_nvdata(struct udevice *dev, const uint8_t *block, int size)
{
struct ec_params_vbnvcontext p;
int len;
if (size != EC_VBNV_BLOCK_SIZE && size != EC_VBNV_BLOCK_SIZE_V2)
return -EINVAL;
p.op = EC_VBNV_CONTEXT_OP_WRITE;
memcpy(p.block, block, size);
len = ec_command_inptr(dev, EC_CMD_VBNV_CONTEXT, EC_VER_VBNV_CONTEXT,
&p, sizeof(uint32_t) + size, NULL, 0);
if (len < 0)
return -1;
return 0;
}
int cros_ec_test(struct cros_ec_dev *dev)
{
struct ec_params_hello req;
struct ec_response_hello *resp;
req.in_data = 0x12345678;
if (ec_command_inptr(dev, EC_CMD_HELLO, 0, &req, sizeof(req),
(uint8_t **)&resp, sizeof(*resp)) < sizeof(*resp)) {
printf("ec_command_inptr() returned error\n");
return -1;
}
if (resp->out_data != req.in_data + 0x01020304) {
printf("Received invalid handshake %x\n", resp->out_data);
return -1;
}
return 0;
}
int cros_ec_get_host_events(struct cros_ec_dev *dev, uint32_t *events_ptr)
{
struct ec_response_host_event_mask *resp;
/*
* Use the B copy of the event flags, because the main copy is already
* used by ACPI/SMI.
*/
if (ec_command_inptr(dev, EC_CMD_HOST_EVENT_GET_B, 0, NULL, 0,
(uint8_t **)&resp, sizeof(*resp)) < (int)sizeof(*resp))
return -1;
if (resp->mask & EC_HOST_EVENT_MASK(EC_HOST_EVENT_INVALID))
return -1;
*events_ptr = resp->mask;
return 0;
}
int cros_ec_flash_offset(struct cros_ec_dev *dev, enum ec_flash_region region,
uint32_t *offset, uint32_t *size)
{
struct ec_params_flash_region_info p;
struct ec_response_flash_region_info *r;
int ret;
p.region = region;
ret = ec_command_inptr(dev, EC_CMD_FLASH_REGION_INFO,
EC_VER_FLASH_REGION_INFO,
&p, sizeof(p), (uint8_t **)&r, sizeof(*r));
if (ret != sizeof(*r))
return -1;
if (offset)
*offset = r->offset;
if (size)
*size = r->size;
return 0;
}
/**
* 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 dev CROS-EC device
* @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
*/
static int cros_ec_flash_write_block(struct udevice *dev, const uint8_t *data,
uint32_t offset, uint32_t size)
{
struct ec_params_flash_write *p;
int ret;
p = malloc(sizeof(*p) + size);
if (!p)
return -ENOMEM;
p->offset = offset;
p->size = size;
assert(data && p->size <= EC_FLASH_WRITE_VER0_SIZE);
memcpy(p + 1, data, p->size);
ret = ec_command_inptr(dev, EC_CMD_FLASH_WRITE, 0,
p, sizeof(*p) + size, NULL, 0) >= 0 ? 0 : -1;
free(p);
return ret;
}
/**
* Send a command to the CROS-EC device and return the reply.
*
* The device's internal input/output buffers are used.
*
* @param dev CROS-EC device
* @param cmd Command to send (EC_CMD_...)
* @param cmd_version Version of command to send (EC_VER_...)
* @param dout Output data (may be NULL If dout_len=0)
* @param dout_len Size of output data in bytes
* @param din Response data (may be NULL If din_len=0).
* It not NULL, it is a place for ec_command() to copy the
* data to.
* @param din_len Maximum size of response in bytes
* @return number of bytes in response, or -ve on error
*/
static int ec_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version,
const void *dout, int dout_len,
void *din, int din_len)
{
uint8_t *in_buffer;
int len;
assert((din_len == 0) || din);
len = ec_command_inptr(dev, cmd, cmd_version, dout, dout_len,
&in_buffer, din_len);
if (len > 0) {
/*
* If we were asked to put it somewhere, do so, otherwise just
* disregard the result.
*/
if (din && in_buffer) {
assert(len <= din_len);
memmove(din, in_buffer, len);
}
}
return len;
}
static int cros_ec_invalidate_hash(struct cros_ec_dev *dev)
{
struct ec_params_vboot_hash p;
struct ec_response_vboot_hash *hash;
/* We don't have an explict command for the EC to discard its current
* hash value, so we'll just tell it to calculate one that we know is
* wrong (we claim that hashing zero bytes is always invalid).
*/
p.cmd = EC_VBOOT_HASH_RECALC;
p.hash_type = EC_VBOOT_HASH_TYPE_SHA256;
p.nonce_size = 0;
p.offset = 0;
p.size = 0;
debug("%s:\n", __func__);
if (ec_command_inptr(dev, EC_CMD_VBOOT_HASH, 0, &p, sizeof(p),
(uint8_t **)&hash, sizeof(*hash)) < 0)
return -1;
/* No need to wait for it to finish */
return 0;
}
