cros_ec: Sync up with latest Chrome OS EC version
The EC messages have been expanded and some parts have been renamed.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/cros_ec.h b/include/cros_ec.h
index 999c3c9..3166132 100644
--- a/include/cros_ec.h
+++ b/include/cros_ec.h
@@ -151,7 +151,7 @@
};
/**
- * Set up the Chromium OS matrix keyboard protocol
+ * Initialise the Chromium OS EC driver
*
* @param blob Device tree blob containing setup information
* @param cros_ecp Returns pointer to the cros_ec device, or NULL if none
@@ -168,7 +168,7 @@
* @param info Place to put the info structure
*/
int cros_ec_info(struct cros_ec_dev *dev,
- struct ec_response_cros_ec_info *info);
+ struct ec_response_mkbp_info *info);
/**
* Read the host event flags
diff --git a/include/cros_ec_message.h b/include/cros_ec_message.h
index b1da53d..36e2d83 100644
--- a/include/cros_ec_message.h
+++ b/include/cros_ec_message.h
@@ -23,7 +23,7 @@
MSG_PROTO_BYTES = MSG_HEADER_BYTES + MSG_TRAILER_BYTES,
/* Max length of messages */
- MSG_BYTES = EC_HOST_PARAM_SIZE + MSG_PROTO_BYTES,
+ MSG_BYTES = EC_PROTO2_MAX_PARAM_SIZE + MSG_PROTO_BYTES,
};
#endif
diff --git a/include/ec_commands.h b/include/ec_commands.h
index d9c8c1f..78baab1 100644
--- a/include/ec_commands.h
+++ b/include/ec_commands.h
@@ -1,4 +1,4 @@
-/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
@@ -42,13 +42,19 @@
#define EC_LPC_ADDR_HOST_CMD 0x204
/* I/O addresses for host command args and params */
-#define EC_LPC_ADDR_HOST_ARGS 0x800
-#define EC_LPC_ADDR_HOST_PARAM 0x804
-#define EC_HOST_PARAM_SIZE 0x0fc /* Size of param area in bytes */
+/* Protocol version 2 */
+#define EC_LPC_ADDR_HOST_ARGS 0x800 /* And 0x801, 0x802, 0x803 */
+#define EC_LPC_ADDR_HOST_PARAM 0x804 /* For version 2 params; size is
+ * EC_PROTO2_MAX_PARAM_SIZE */
+/* Protocol version 3 */
+#define EC_LPC_ADDR_HOST_PACKET 0x800 /* Offset of version 3 packet */
+#define EC_LPC_HOST_PACKET_SIZE 0x100 /* Max size of version 3 packet */
-/* I/O addresses for host command params, old interface */
-#define EC_LPC_ADDR_OLD_PARAM 0x880
-#define EC_OLD_PARAM_SIZE 0x080 /* Size of param area in bytes */
+/* The actual block is 0x800-0x8ff, but some BIOSes think it's 0x880-0x8ff
+ * and they tell the kernel that so we have to think of it as two parts. */
+#define EC_HOST_CMD_REGION0 0x800
+#define EC_HOST_CMD_REGION1 0x880
+#define EC_HOST_CMD_REGION_SIZE 0x80
/* EC command register bit functions */
#define EC_LPC_CMDR_DATA (1 << 0) /* Data ready for host to read */
@@ -122,8 +128,8 @@
#define EC_SWITCH_LID_OPEN 0x01
#define EC_SWITCH_POWER_BUTTON_PRESSED 0x02
#define EC_SWITCH_WRITE_PROTECT_DISABLED 0x04
-/* Recovery requested via keyboard */
-#define EC_SWITCH_KEYBOARD_RECOVERY 0x08
+/* Was recovery requested via keyboard; now unused. */
+#define EC_SWITCH_IGNORE1 0x08
/* Recovery requested via dedicated signal (from servo board) */
#define EC_SWITCH_DEDICATED_RECOVERY 0x10
/* Was fake developer mode switch; now unused. Remove in next refactor. */
@@ -132,10 +138,13 @@
/* Host command interface flags */
/* Host command interface supports LPC args (LPC interface only) */
#define EC_HOST_CMD_FLAG_LPC_ARGS_SUPPORTED 0x01
+/* Host command interface supports version 3 protocol */
+#define EC_HOST_CMD_FLAG_VERSION_3 0x02
/* Wireless switch flags */
#define EC_WIRELESS_SWITCH_WLAN 0x01
#define EC_WIRELESS_SWITCH_BLUETOOTH 0x02
+#define EC_WIRELESS_SWITCH_WWAN 0x04
/*
* This header file is used in coreboot both in C and ACPI code. The ACPI code
@@ -191,6 +200,9 @@
EC_RES_UNAVAILABLE = 9, /* No response available */
EC_RES_TIMEOUT = 10, /* We got a timeout */
EC_RES_OVERFLOW = 11, /* Table / data overflow */
+ EC_RES_INVALID_HEADER = 12, /* Header contains invalid data */
+ EC_RES_REQUEST_TRUNCATED = 13, /* Didn't get the entire request */
+ EC_RES_RESPONSE_TOO_BIG = 14 /* Response was too big to handle */
};
/*
@@ -272,6 +284,105 @@
*/
#define EC_HOST_ARGS_FLAG_TO_HOST 0x02
+/*****************************************************************************/
+
+/*
+ * Protocol version 2 for I2C and SPI send a request this way:
+ *
+ * 0 EC_CMD_VERSION0 + (command version)
+ * 1 Command number
+ * 2 Length of params = N
+ * 3..N+2 Params, if any
+ * N+3 8-bit checksum of bytes 0..N+2
+ *
+ * The corresponding response is:
+ *
+ * 0 Result code (EC_RES_*)
+ * 1 Length of params = M
+ * 2..M+1 Params, if any
+ * M+2 8-bit checksum of bytes 0..M+1
+ */
+#define EC_PROTO2_REQUEST_HEADER_BYTES 3
+#define EC_PROTO2_REQUEST_TRAILER_BYTES 1
+#define EC_PROTO2_REQUEST_OVERHEAD (EC_PROTO2_REQUEST_HEADER_BYTES + \
+ EC_PROTO2_REQUEST_TRAILER_BYTES)
+
+#define EC_PROTO2_RESPONSE_HEADER_BYTES 2
+#define EC_PROTO2_RESPONSE_TRAILER_BYTES 1
+#define EC_PROTO2_RESPONSE_OVERHEAD (EC_PROTO2_RESPONSE_HEADER_BYTES + \
+ EC_PROTO2_RESPONSE_TRAILER_BYTES)
+
+/* Parameter length was limited by the LPC interface */
+#define EC_PROTO2_MAX_PARAM_SIZE 0xfc
+
+/* Maximum request and response packet sizes for protocol version 2 */
+#define EC_PROTO2_MAX_REQUEST_SIZE (EC_PROTO2_REQUEST_OVERHEAD + \
+ EC_PROTO2_MAX_PARAM_SIZE)
+#define EC_PROTO2_MAX_RESPONSE_SIZE (EC_PROTO2_RESPONSE_OVERHEAD + \
+ EC_PROTO2_MAX_PARAM_SIZE)
+
+/*****************************************************************************/
+
+/*
+ * Value written to legacy command port / prefix byte to indicate protocol
+ * 3+ structs are being used. Usage is bus-dependent.
+ */
+#define EC_COMMAND_PROTOCOL_3 0xda
+
+#define EC_HOST_REQUEST_VERSION 3
+
+/* Version 3 request from host */
+struct ec_host_request {
+ /* Struct version (=3)
+ *
+ * EC will return EC_RES_INVALID_HEADER if it receives a header with a
+ * version it doesn't know how to parse.
+ */
+ uint8_t struct_version;
+
+ /*
+ * Checksum of request and data; sum of all bytes including checksum
+ * should total to 0.
+ */
+ uint8_t checksum;
+
+ /* Command code */
+ uint16_t command;
+
+ /* Command version */
+ uint8_t command_version;
+
+ /* Unused byte in current protocol version; set to 0 */
+ uint8_t reserved;
+
+ /* Length of data which follows this header */
+ uint16_t data_len;
+} __packed;
+
+#define EC_HOST_RESPONSE_VERSION 3
+
+/* Version 3 response from EC */
+struct ec_host_response {
+ /* Struct version (=3) */
+ uint8_t struct_version;
+
+ /*
+ * Checksum of response and data; sum of all bytes including checksum
+ * should total to 0.
+ */
+ uint8_t checksum;
+
+ /* Result code (EC_RES_*) */
+ uint16_t result;
+
+ /* Length of data which follows this header */
+ uint16_t data_len;
+
+ /* Unused bytes in current protocol version; set to 0 */
+ uint16_t reserved;
+} __packed;
+
+/*****************************************************************************/
/*
* Notes on commands:
*
@@ -411,6 +522,46 @@
uint32_t flags; /* Mask of enum ec_comms_status */
} __packed;
+/*
+ * Fake a variety of responses, purely for testing purposes.
+ * FIXME: Would be nice to force checksum errors.
+ */
+#define EC_CMD_TEST_PROTOCOL 0x0a
+
+/* Tell the EC what to send back to us. */
+struct ec_params_test_protocol {
+ uint32_t ec_result;
+ uint32_t ret_len;
+ uint8_t buf[32];
+} __packed;
+
+/* Here it comes... */
+struct ec_response_test_protocol {
+ uint8_t buf[32];
+} __packed;
+
+/* Get prococol information */
+#define EC_CMD_GET_PROTOCOL_INFO 0x0b
+
+/* Flags for ec_response_get_protocol_info.flags */
+/* EC_RES_IN_PROGRESS may be returned if a command is slow */
+#define EC_PROTOCOL_INFO_IN_PROGRESS_SUPPORTED (1 << 0)
+
+struct ec_response_get_protocol_info {
+ /* Fields which exist if at least protocol version 3 supported */
+
+ /* Bitmask of protocol versions supported (1 << n means version n)*/
+ uint32_t protocol_versions;
+
+ /* Maximum request packet size, in bytes */
+ uint16_t max_request_packet_size;
+
+ /* Maximum response packet size, in bytes */
+ uint16_t max_response_packet_size;
+
+ /* Flags; see EC_PROTOCOL_INFO_* */
+ uint32_t flags;
+} __packed;
/*****************************************************************************/
/* Flash commands */
@@ -452,15 +603,15 @@
/* Write flash */
#define EC_CMD_FLASH_WRITE 0x12
+#define EC_VER_FLASH_WRITE 1
+
+/* Version 0 of the flash command supported only 64 bytes of data */
+#define EC_FLASH_WRITE_VER0_SIZE 64
struct ec_params_flash_write {
uint32_t offset; /* Byte offset to write */
uint32_t size; /* Size to write in bytes */
- /*
- * Data to write. Could really use EC_PARAM_SIZE - 8, but tidiest to
- * use a power of 2 so writes stay aligned.
- */
- uint8_t data[64];
+ /* Followed by data to write */
} __packed;
/* Erase flash */
@@ -729,6 +880,49 @@
};
/*****************************************************************************/
+/* LED control commands */
+
+#define EC_CMD_LED_CONTROL 0x29
+
+enum ec_led_id {
+ EC_LED_ID_BATTERY_LED = 0,
+ EC_LED_ID_POWER_BUTTON_LED,
+ EC_LED_ID_ADAPTER_LED,
+};
+
+/* LED control flags */
+#define EC_LED_FLAGS_QUERY (1 << 0) /* Query LED capability only */
+#define EC_LED_FLAGS_AUTO (1 << 1) /* Switch LED back to automatic control */
+
+enum ec_led_colors {
+ EC_LED_COLOR_RED = 0,
+ EC_LED_COLOR_GREEN,
+ EC_LED_COLOR_BLUE,
+ EC_LED_COLOR_YELLOW,
+ EC_LED_COLOR_WHITE,
+
+ EC_LED_COLOR_COUNT
+};
+
+struct ec_params_led_control {
+ uint8_t led_id; /* Which LED to control */
+ uint8_t flags; /* Control flags */
+
+ uint8_t brightness[EC_LED_COLOR_COUNT];
+} __packed;
+
+struct ec_response_led_control {
+ /*
+ * Available brightness value range.
+ *
+ * Range 0 means color channel not present.
+ * Range 1 means on/off control.
+ * Other values means the LED is control by PWM.
+ */
+ uint8_t brightness_range[EC_LED_COLOR_COUNT];
+} __packed;
+
+/*****************************************************************************/
/* Verified boot commands */
/*
@@ -916,57 +1110,57 @@
} __packed;
/*****************************************************************************/
-/* CROS_EC - Matrix KeyBoard Protocol */
+/* MKBP - Matrix KeyBoard Protocol */
/*
* Read key state
*
- * Returns raw data for keyboard cols; see ec_response_cros_ec_info.cols for
+ * Returns raw data for keyboard cols; see ec_response_mkbp_info.cols for
* expected response size.
*/
-#define EC_CMD_CROS_EC_STATE 0x60
+#define EC_CMD_MKBP_STATE 0x60
/* Provide information about the matrix : number of rows and columns */
-#define EC_CMD_CROS_EC_INFO 0x61
+#define EC_CMD_MKBP_INFO 0x61
-struct ec_response_cros_ec_info {
+struct ec_response_mkbp_info {
uint32_t rows;
uint32_t cols;
uint8_t switches;
} __packed;
/* Simulate key press */
-#define EC_CMD_CROS_EC_SIMULATE_KEY 0x62
+#define EC_CMD_MKBP_SIMULATE_KEY 0x62
-struct ec_params_cros_ec_simulate_key {
+struct ec_params_mkbp_simulate_key {
uint8_t col;
uint8_t row;
uint8_t pressed;
} __packed;
/* Configure keyboard scanning */
-#define EC_CMD_CROS_EC_SET_CONFIG 0x64
-#define EC_CMD_CROS_EC_GET_CONFIG 0x65
+#define EC_CMD_MKBP_SET_CONFIG 0x64
+#define EC_CMD_MKBP_GET_CONFIG 0x65
/* flags */
-enum cros_ec_config_flags {
- EC_CROS_EC_FLAGS_ENABLE = 1, /* Enable keyboard scanning */
+enum mkbp_config_flags {
+ EC_MKBP_FLAGS_ENABLE = 1, /* Enable keyboard scanning */
};
-enum cros_ec_config_valid {
- EC_CROS_EC_VALID_SCAN_PERIOD = 1 << 0,
- EC_CROS_EC_VALID_POLL_TIMEOUT = 1 << 1,
- EC_CROS_EC_VALID_MIN_POST_SCAN_DELAY = 1 << 3,
- EC_CROS_EC_VALID_OUTPUT_SETTLE = 1 << 4,
- EC_CROS_EC_VALID_DEBOUNCE_DOWN = 1 << 5,
- EC_CROS_EC_VALID_DEBOUNCE_UP = 1 << 6,
- EC_CROS_EC_VALID_FIFO_MAX_DEPTH = 1 << 7,
+enum mkbp_config_valid {
+ EC_MKBP_VALID_SCAN_PERIOD = 1 << 0,
+ EC_MKBP_VALID_POLL_TIMEOUT = 1 << 1,
+ EC_MKBP_VALID_MIN_POST_SCAN_DELAY = 1 << 3,
+ EC_MKBP_VALID_OUTPUT_SETTLE = 1 << 4,
+ EC_MKBP_VALID_DEBOUNCE_DOWN = 1 << 5,
+ EC_MKBP_VALID_DEBOUNCE_UP = 1 << 6,
+ EC_MKBP_VALID_FIFO_MAX_DEPTH = 1 << 7,
};
/* Configuration for our key scanning algorithm */
-struct ec_cros_ec_config {
+struct ec_mkbp_config {
uint32_t valid_mask; /* valid fields */
- uint8_t flags; /* some flags (enum cros_ec_config_flags) */
+ uint8_t flags; /* some flags (enum mkbp_config_flags) */
uint8_t valid_flags; /* which flags are valid */
uint16_t scan_period_us; /* period between start of scans */
/* revert to interrupt mode after no activity for this long */
@@ -985,12 +1179,12 @@
uint8_t fifo_max_depth;
} __packed;
-struct ec_params_cros_ec_set_config {
- struct ec_cros_ec_config config;
+struct ec_params_mkbp_set_config {
+ struct ec_mkbp_config config;
} __packed;
-struct ec_response_cros_ec_get_config {
- struct ec_cros_ec_config config;
+struct ec_response_mkbp_get_config {
+ struct ec_mkbp_config config;
} __packed;
/* Run the key scan emulation */
@@ -1146,7 +1340,7 @@
#define EC_CMD_I2C_READ 0x94
struct ec_params_i2c_read {
- uint16_t addr;
+ uint16_t addr; /* 8-bit address (7-bit shifted << 1) */
uint8_t read_size; /* Either 8 or 16. */
uint8_t port;
uint8_t offset;
@@ -1160,7 +1354,7 @@
struct ec_params_i2c_write {
uint16_t data;
- uint16_t addr;
+ uint16_t addr; /* 8-bit address (7-bit shifted << 1) */
uint8_t write_size; /* Either 8 or 16. */
uint8_t port;
uint8_t offset;
@@ -1244,6 +1438,61 @@
} __packed;
/*****************************************************************************/
+/* Power info. */
+
+/*
+ * Get power info.
+ */
+#define EC_CMD_POWER_INFO 0x9d
+
+struct ec_response_power_info {
+ uint32_t usb_dev_type;
+ uint16_t voltage_ac;
+ uint16_t voltage_system;
+ uint16_t current_system;
+ uint16_t usb_current_limit;
+} __packed;
+
+/*****************************************************************************/
+/* I2C passthru command */
+
+#define EC_CMD_I2C_PASSTHRU 0x9e
+
+/* Slave address is 10 (not 7) bit */
+#define EC_I2C_FLAG_10BIT (1 << 16)
+
+/* Read data; if not present, message is a write */
+#define EC_I2C_FLAG_READ (1 << 15)
+
+/* Mask for address */
+#define EC_I2C_ADDR_MASK 0x3ff
+
+#define EC_I2C_STATUS_NAK (1 << 0) /* Transfer was not acknowledged */
+#define EC_I2C_STATUS_TIMEOUT (1 << 1) /* Timeout during transfer */
+
+/* Any error */
+#define EC_I2C_STATUS_ERROR (EC_I2C_STATUS_NAK | EC_I2C_STATUS_TIMEOUT)
+
+struct ec_params_i2c_passthru_msg {
+ uint16_t addr_flags; /* I2C slave address (7 or 10 bits) and flags */
+ uint16_t len; /* Number of bytes to read or write */
+} __packed;
+
+struct ec_params_i2c_passthru {
+ uint8_t port; /* I2C port number */
+ uint8_t num_msgs; /* Number of messages */
+ struct ec_params_i2c_passthru_msg msg[];
+ /* Data to write for all messages is concatenated here */
+} __packed;
+
+struct ec_response_i2c_passthru {
+ uint8_t i2c_status; /* Status flags (EC_I2C_STATUS_...) */
+ uint8_t num_msgs; /* Number of messages processed */
+ uint8_t data[]; /* Data read by messages concatenated here */
+} __packed;
+
+
+/*****************************************************************************/
/* Temporary debug commands. TODO: remove this crosbug.com/p/13849 */
/*
@@ -1259,7 +1508,16 @@
#define EC_CMD_CHARGE_CURRENT_LIMIT 0xa1
struct ec_params_current_limit {
- uint32_t limit;
+ uint32_t limit; /* in mA */
+} __packed;
+
+/*
+ * Set maximum external power current.
+ */
+#define EC_CMD_EXT_POWER_CURRENT_LIMIT 0xa2
+
+struct ec_params_ext_power_current_limit {
+ uint32_t limit; /* in mA */
} __packed;
/*****************************************************************************/