*/
/*
- * The Matrix Keyboard Protocol driver handles talking to the keyboard
- * controller chip. Mostly this is for keyboard functions, but some other
- * things have slipped in, so we provide generic services to talk to the
- * KBC.
+ * This is the interface to the Chrome OS EC. It provides keyboard functions,
+ * power control and battery management. Quite a few other functions are
+ * provided to enable the EC software to be updated, talk to the EC's I2C bus
+ * and store a small amount of data in a memory which persists while the EC
+ * is not reset.
*/
#include <common.h>
int cros_ec_scan_keyboard(struct cros_ec_dev *dev, struct mbkp_keyscan *scan)
{
- if (ec_command(dev, EC_CMD_CROS_EC_STATE, 0, NULL, 0, scan,
+ if (ec_command(dev, EC_CMD_MKBP_STATE, 0, NULL, 0, scan,
sizeof(scan->data)) < sizeof(scan->data))
return -1;
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_HOST_PARAM_SIZE) < 0)
+ (uint8_t **)strp, EC_PROTO2_MAX_PARAM_SIZE) < 0)
return -1;
return 0;
debug("%s: No valid hash (status=%d size=%d). Compute one...\n",
__func__, hash->status, hash->size);
- p.cmd = EC_VBOOT_HASH_RECALC;
+ p.cmd = EC_VBOOT_HASH_START;
p.hash_type = EC_VBOOT_HASH_TYPE_SHA256;
p.nonce_size = 0;
p.offset = EC_VBOOT_HASH_OFFSET_RW;
return !gpio_get_value(dev->ec_int.gpio);
}
-int cros_ec_info(struct cros_ec_dev *dev, struct ec_response_cros_ec_info *info)
+int cros_ec_info(struct cros_ec_dev *dev, struct ec_response_mkbp_info *info)
{
- if (ec_command(dev, EC_CMD_CROS_EC_INFO, 0, NULL, 0, info,
- sizeof(*info)) < sizeof(*info))
+ if (ec_command(dev, EC_CMD_MKBP_INFO, 0, NULL, 0, info,
+ sizeof(*info)) < sizeof(*info))
return -1;
return 0;
p.offset = offset;
p.size = size;
- assert(data && p.size <= sizeof(p.data));
- memcpy(p.data, data, p.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;
*/
static int cros_ec_flash_write_burst_size(struct cros_ec_dev *dev)
{
- struct ec_params_flash_write p;
- return sizeof(p.data);
+ return EC_FLASH_WRITE_VER0_SIZE;
}
/**
}
/**
- * Decode MBKP details from the device tree and allocate a suitable device.
+ * Decode EC interface details from the device tree and allocate a suitable
+ * device.
*
* @param blob Device tree blob
* @param node Node to decode from
}
printf("%s\n", id);
} else if (0 == strcmp("info", cmd)) {
- struct ec_response_cros_ec_info info;
+ struct ec_response_mkbp_info info;
if (cros_ec_info(dev, &info)) {
debug("%s: Could not read KBC info\n", __func__);
-/* 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.
*/
#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 */
-
-/* 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 */
+/* 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 */
+
+/* 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 */
#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. */
/* 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
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 */
};
/*
*/
#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:
*
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 */
/* 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 */
LIGHTBAR_NUM_CMDS
};
+/*****************************************************************************/
+/* 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 */
} __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 */
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 */
#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;
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;
uint8_t state;
} __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 */
#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;
/*****************************************************************************/
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