Newer
Older
gpio_request_by_name(dev, "ec-interrupt", 0, &cdev->ec_int,
GPIOD_IS_IN);
cdev->optimise_flash_write = fdtdec_get_bool(blob, node,
"optimise-flash-write");
if (cros_ec_check_version(cdev)) {
debug("%s: Could not detect CROS-EC version\n", __func__);
return -CROS_EC_ERR_CHECK_VERSION;
}
if (cros_ec_read_id(cdev, id, sizeof(id))) {
debug("%s: Could not read KBC ID\n", __func__);
return -CROS_EC_ERR_READ_ID;
}
/* Remember this device for use by the cros_ec command */
debug("Google Chrome EC v%d CROS-EC driver ready, id '%s'\n",
cdev->protocol_version, id);
int cros_ec_decode_ec_flash(const void *blob, int node,
struct fdt_cros_ec *config)
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
flash_node = fdt_subnode_offset(blob, node, "flash");
if (flash_node < 0) {
debug("Failed to find flash node\n");
return -1;
}
if (fdtdec_read_fmap_entry(blob, flash_node, "flash",
&config->flash)) {
debug("Failed to decode flash node in chrome-ec'\n");
return -1;
}
config->flash_erase_value = fdtdec_get_int(blob, flash_node,
"erase-value", -1);
for (node = fdt_first_subnode(blob, flash_node); node >= 0;
node = fdt_next_subnode(blob, node)) {
const char *name = fdt_get_name(blob, node, NULL);
enum ec_flash_region region;
if (0 == strcmp(name, "ro")) {
region = EC_FLASH_REGION_RO;
} else if (0 == strcmp(name, "rw")) {
region = EC_FLASH_REGION_RW;
} else if (0 == strcmp(name, "wp-ro")) {
region = EC_FLASH_REGION_WP_RO;
} else {
debug("Unknown EC flash region name '%s'\n", name);
return -1;
}
if (fdtdec_read_fmap_entry(blob, node, "reg",
&config->region[region])) {
debug("Failed to decode flash region in chrome-ec'\n");
return -1;
}
}
return 0;
}
int cros_ec_i2c_tunnel(struct udevice *dev, int port, struct i2c_msg *in,
int nmsgs)
{
struct cros_ec_dev *cdev = dev_get_uclass_priv(dev);
union {
struct ec_params_i2c_passthru p;
uint8_t outbuf[EC_PROTO2_MAX_PARAM_SIZE];
} params;
union {
struct ec_response_i2c_passthru r;
uint8_t inbuf[EC_PROTO2_MAX_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;
uint8_t *pdata, *read_ptr = NULL;
int read_len;
int size;
int rv;
int i;
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
p->num_msgs = nmsgs;
size = sizeof(*p) + p->num_msgs * sizeof(*msg);
/* Create a message to write the register address and optional data */
pdata = (uint8_t *)p + size;
read_len = 0;
for (i = 0, msg = p->msg; i < nmsgs; i++, msg++, in++) {
bool is_read = in->flags & I2C_M_RD;
msg->addr_flags = in->addr;
msg->len = in->len;
if (is_read) {
msg->addr_flags |= EC_I2C_FLAG_READ;
read_len += in->len;
read_ptr = in->buf;
if (sizeof(*r) + read_len > sizeof(response)) {
puts("Read length too big for buffer\n");
return -1;
}
} else {
if (pdata - (uint8_t *)p + in->len > sizeof(params)) {
puts("Params too large for buffer\n");
return -1;
}
memcpy(pdata, in->buf, in->len);
pdata += in->len;
}
}
rv = ec_command(cdev, EC_CMD_I2C_PASSTHRU, 0, p, pdata - (uint8_t *)p,
r, sizeof(*r) + read_len);
if (rv < 0)
return rv;
/* Parse response */
if (r->i2c_status & EC_I2C_STATUS_ERROR) {
printf("Transfer failed with status=0x%x\n", r->i2c_status);
return -1;
}
if (rv < sizeof(*r) + read_len) {
puts("Truncated read response\n");
return -1;
}
/* We only support a single read message for each transfer */
if (read_len)
memcpy(read_ptr, r->data, read_len);
return 0;
}
UCLASS_DRIVER(cros_ec) = {
.id = UCLASS_CROS_EC,
.name = "cros_ec",
.per_device_auto_alloc_size = sizeof(struct cros_ec_dev),
.post_bind = dm_scan_fdt_dev,