Merge tag 'chrome-platform-for-linus-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/bleung/chrome-platform

Pull chrome platform updates from Benson Leung:
 "Changes in this pull request are around catching up cros_ec with the
  internal chromeos-kernel versions of cros_ec, cros_ec_lpc, and
  cros_ec_lightbar.

  Also, switching maintainership from olof to bleung"

* tag 'chrome-platform-for-linus-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/bleung/chrome-platform:
  platform/chrome : Add myself as Maintainer
  platform/chrome: cros_ec_lightbar - hide unused PM functions
  cros_ec: Don't signal wake event for non-wake host events
  cros_ec: Fix deadlock when EC is not responsive at probe
  cros_ec: Don't return error when checking command version
  platform/chrome: cros_ec_lightbar - Avoid I2C xfer to EC during suspend
  platform/chrome: cros_ec_lightbar - Add userspace lightbar control bit to EC
  platform/chrome: cros_ec_lightbar - Control of suspend/resume lightbar sequence
  platform/chrome: cros_ec_lightbar - Add lightbar program feature to sysfs
  platform/chrome: cros_ec_lpc: Add MKBP events support over ACPI
  platform/chrome: cros_ec_lpc: Add power management ops
  platform/chrome: cros_ec_lpc: Add support for GOOG004 ACPI device
  platform/chrome: cros_ec_lpc: Add support for mec1322 EC
  platform/chrome: cros_ec_lpc: Add R/W helpers to LPC protocol variants
  mfd: cros_ec: Add support for dumping panic information
  cros_ec_debugfs: Pass proper struct sizes to cros_ec_cmd_xfer()
  mfd: cros_ec: add debugfs, console log file
  mfd: cros_ec: Add EC console read structures definitions
  mfd: cros_ec: Add helper for event notifier.

4 files changed, 208 insertions, 4 deletions

diff --git a/include/linux/mfd/cros_ec.h b/include/linux/mfd/cros_ec.h
index 28baee63eaf6..4e887ba22635 100644
--- a/include/linux/mfd/cros_ec.h
+++ b/include/linux/mfd/cros_ec.h
@@ -149,6 +149,7 @@ struct cros_ec_device {
 
 	struct ec_response_get_next_event event_data;
 	int event_size;
+	u32 host_event_wake_mask;
 };
 
 /**
@@ -172,6 +173,8 @@ struct cros_ec_platform {
 	u16 cmd_offset;
 };
 
+struct cros_ec_debugfs;
+
 /*
  * struct cros_ec_dev - ChromeOS EC device entry point
  *
@@ -179,6 +182,7 @@ struct cros_ec_platform {
  * @cdev: Character device structure in /dev
  * @ec_dev: cros_ec_device structure to talk to the physical device
  * @dev: pointer to the platform device
+ * @debug_info: cros_ec_debugfs structure for debugging information
  * @cmd_offset: offset to apply for each command.
  */
 struct cros_ec_dev {
@@ -186,6 +190,7 @@ struct cros_ec_dev {
 	struct cdev cdev;
 	struct cros_ec_device *ec_dev;
 	struct device *dev;
+	struct cros_ec_debugfs *debug_info;
 	u16 cmd_offset;
 	u32 features[2];
 };
@@ -295,10 +300,22 @@ int cros_ec_query_all(struct cros_ec_device *ec_dev);
  * cros_ec_get_next_event -  Fetch next event from the ChromeOS EC
  *
  * @ec_dev: Device to fetch event from
+ * @wake_event: Pointer to a bool set to true upon return if the event might be
+ *              treated as a wake event. Ignored if null.
  *
  * Returns: 0 on success, Linux error number on failure
  */
-int cros_ec_get_next_event(struct cros_ec_device *ec_dev);
+int cros_ec_get_next_event(struct cros_ec_device *ec_dev, bool *wake_event);
+
+/**
+ * cros_ec_get_host_event - Return a mask of event set by the EC.
+ *
+ * When MKBP is supported, when the EC raises an interrupt,
+ * We collect the events raised and call the functions in the ec notifier.
+ *
+ * This function is a helper to know which events are raised.
+ */
+u32 cros_ec_get_host_event(struct cros_ec_device *ec_dev);
 
 /* sysfs stuff */
 extern struct attribute_group cros_ec_attr_group;
diff --git a/include/linux/mfd/cros_ec_commands.h b/include/linux/mfd/cros_ec_commands.h
index c93e7e0300ef..190c8f4afa02 100644
--- a/include/linux/mfd/cros_ec_commands.h
+++ b/include/linux/mfd/cros_ec_commands.h
@@ -625,6 +625,10 @@ struct ec_params_get_cmd_versions {
 	uint8_t cmd;      /* Command to check */
 } __packed;
 
+struct ec_params_get_cmd_versions_v1 {
+	uint16_t cmd;     /* Command to check */
+} __packed;
+
 struct ec_response_get_cmd_versions {
 	/*
 	 * Mask of supported versions; use EC_VER_MASK() to compare with a
@@ -1158,13 +1162,20 @@ struct lightbar_params_v1 {
 	struct rgb_s color[8];			/* 0-3 are Google colors */
 } __packed;
 
+/* Lightbar program */
+#define EC_LB_PROG_LEN 192
+struct lightbar_program {
+	uint8_t size;
+	uint8_t data[EC_LB_PROG_LEN];
+};
+
 struct ec_params_lightbar {
 	uint8_t cmd;		      /* Command (see enum lightbar_command) */
 	union {
 		struct {
 			/* no args */
 		} dump, off, on, init, get_seq, get_params_v0, get_params_v1,
-			version, get_brightness, get_demo;
+			version, get_brightness, get_demo, suspend, resume;
 
 		struct {
 			uint8_t num;
@@ -1182,8 +1193,13 @@ struct ec_params_lightbar {
 			uint8_t led;
 		} get_rgb;
 
+		struct {
+			uint8_t enable;
+		} manual_suspend_ctrl;
+
 		struct lightbar_params_v0 set_params_v0;
 		struct lightbar_params_v1 set_params_v1;
+		struct lightbar_program set_program;
 	};
 } __packed;
 
@@ -1216,7 +1232,8 @@ struct ec_response_lightbar {
 		struct {
 			/* no return params */
 		} off, on, init, set_brightness, seq, reg, set_rgb,
-			demo, set_params_v0, set_params_v1;
+			demo, set_params_v0, set_params_v1,
+			set_program, manual_suspend_ctrl, suspend, resume;
 	};
 } __packed;
 
@@ -1240,6 +1257,10 @@ enum lightbar_command {
 	LIGHTBAR_CMD_GET_DEMO = 15,
 	LIGHTBAR_CMD_GET_PARAMS_V1 = 16,
 	LIGHTBAR_CMD_SET_PARAMS_V1 = 17,
+	LIGHTBAR_CMD_SET_PROGRAM = 18,
+	LIGHTBAR_CMD_MANUAL_SUSPEND_CTRL = 19,
+	LIGHTBAR_CMD_SUSPEND = 20,
+	LIGHTBAR_CMD_RESUME = 21,
 	LIGHTBAR_NUM_CMDS
 };
 
@@ -2285,13 +2306,28 @@ struct ec_params_charge_control {
 #define EC_CMD_CONSOLE_SNAPSHOT 0x97
 
 /*
- * Read next chunk of data from saved snapshot.
+ * Read data from the saved snapshot. If the subcmd parameter is
+ * CONSOLE_READ_NEXT, this will return data starting from the beginning of
+ * the latest snapshot. If it is CONSOLE_READ_RECENT, it will start from the
+ * end of the previous snapshot.
+ *
+ * The params are only looked at in version >= 1 of this command. Prior
+ * versions will just default to CONSOLE_READ_NEXT behavior.
  *
  * Response is null-terminated string.  Empty string, if there is no more
  * remaining output.
  */
 #define EC_CMD_CONSOLE_READ 0x98
 
+enum ec_console_read_subcmd {
+	CONSOLE_READ_NEXT = 0,
+	CONSOLE_READ_RECENT
+};
+
+struct ec_params_console_read_v1 {
+	uint8_t subcmd; /* enum ec_console_read_subcmd */
+} __packed;
+
 /*****************************************************************************/
 
 /*
diff --git a/include/linux/mfd/cros_ec_lpc_mec.h b/include/linux/mfd/cros_ec_lpc_mec.h
new file mode 100644
index 000000000000..176496ddc66c
--- /dev/null
+++ b/include/linux/mfd/cros_ec_lpc_mec.h
@@ -0,0 +1,90 @@
+/*
+ * cros_ec_lpc_mec - LPC variant I/O for Microchip EC
+ *
+ * Copyright (C) 2016 Google, Inc
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * This driver uses the Chrome OS EC byte-level message-based protocol for
+ * communicating the keyboard state (which keys are pressed) from a keyboard EC
+ * to the AP over some bus (such as i2c, lpc, spi).  The EC does debouncing,
+ * but everything else (including deghosting) is done here.  The main
+ * motivation for this is to keep the EC firmware as simple as possible, since
+ * it cannot be easily upgraded and EC flash/IRAM space is relatively
+ * expensive.
+ */
+
+#ifndef __LINUX_MFD_CROS_EC_MEC_H
+#define __LINUX_MFD_CROS_EC_MEC_H
+
+#include <linux/mfd/cros_ec_commands.h>
+
+enum cros_ec_lpc_mec_emi_access_mode {
+	/* 8-bit access */
+	ACCESS_TYPE_BYTE = 0x0,
+	/* 16-bit access */
+	ACCESS_TYPE_WORD = 0x1,
+	/* 32-bit access */
+	ACCESS_TYPE_LONG = 0x2,
+	/*
+	 * 32-bit access, read or write of MEC_EMI_EC_DATA_B3 causes the
+	 * EC data register to be incremented.
+	 */
+	ACCESS_TYPE_LONG_AUTO_INCREMENT = 0x3,
+};
+
+enum cros_ec_lpc_mec_io_type {
+	MEC_IO_READ,
+	MEC_IO_WRITE,
+};
+
+/* Access IO ranges 0x800 thru 0x9ff using EMI interface instead of LPC */
+#define MEC_EMI_RANGE_START EC_HOST_CMD_REGION0
+#define MEC_EMI_RANGE_END   (EC_LPC_ADDR_MEMMAP + EC_MEMMAP_SIZE)
+
+/* EMI registers are relative to base */
+#define MEC_EMI_BASE 0x800
+#define MEC_EMI_HOST_TO_EC (MEC_EMI_BASE + 0)
+#define MEC_EMI_EC_TO_HOST (MEC_EMI_BASE + 1)
+#define MEC_EMI_EC_ADDRESS_B0 (MEC_EMI_BASE + 2)
+#define MEC_EMI_EC_ADDRESS_B1 (MEC_EMI_BASE + 3)
+#define MEC_EMI_EC_DATA_B0 (MEC_EMI_BASE + 4)
+#define MEC_EMI_EC_DATA_B1 (MEC_EMI_BASE + 5)
+#define MEC_EMI_EC_DATA_B2 (MEC_EMI_BASE + 6)
+#define MEC_EMI_EC_DATA_B3 (MEC_EMI_BASE + 7)
+
+/*
+ * cros_ec_lpc_mec_init
+ *
+ * Initialize MEC I/O.
+ */
+void cros_ec_lpc_mec_init(void);
+
+/*
+ * cros_ec_lpc_mec_destroy
+ *
+ * Cleanup MEC I/O.
+ */
+void cros_ec_lpc_mec_destroy(void);
+
+/**
+ * cros_ec_lpc_io_bytes_mec - Read / write bytes to MEC EMI port
+ *
+ * @io_type: MEC_IO_READ or MEC_IO_WRITE, depending on request
+ * @offset:  Base read / write address
+ * @length:  Number of bytes to read / write
+ * @buf:     Destination / source buffer
+ *
+ * @return 8-bit checksum of all bytes read / written
+ */
+u8 cros_ec_lpc_io_bytes_mec(enum cros_ec_lpc_mec_io_type io_type,
+			    unsigned int offset, unsigned int length, u8 *buf);
+
+#endif /* __LINUX_MFD_CROS_EC_MEC_H */
diff --git a/include/linux/mfd/cros_ec_lpc_reg.h b/include/linux/mfd/cros_ec_lpc_reg.h
new file mode 100644
index 000000000000..5560bef63c2b
--- /dev/null
+++ b/include/linux/mfd/cros_ec_lpc_reg.h
@@ -0,0 +1,61 @@
+/*
+ * cros_ec_lpc_reg - LPC access to the Chrome OS Embedded Controller
+ *
+ * Copyright (C) 2016 Google, Inc
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * This driver uses the Chrome OS EC byte-level message-based protocol for
+ * communicating the keyboard state (which keys are pressed) from a keyboard EC
+ * to the AP over some bus (such as i2c, lpc, spi).  The EC does debouncing,
+ * but everything else (including deghosting) is done here.  The main
+ * motivation for this is to keep the EC firmware as simple as possible, since
+ * it cannot be easily upgraded and EC flash/IRAM space is relatively
+ * expensive.
+ */
+
+#ifndef __LINUX_MFD_CROS_EC_REG_H
+#define __LINUX_MFD_CROS_EC_REG_H
+
+/**
+ * cros_ec_lpc_read_bytes - Read bytes from a given LPC-mapped address.
+ * Returns 8-bit checksum of all bytes read.
+ *
+ * @offset: Base read address
+ * @length: Number of bytes to read
+ * @dest: Destination buffer
+ */
+u8 cros_ec_lpc_read_bytes(unsigned int offset, unsigned int length, u8 *dest);
+
+/**
+ * cros_ec_lpc_write_bytes - Write bytes to a given LPC-mapped address.
+ * Returns 8-bit checksum of all bytes written.
+ *
+ * @offset: Base write address
+ * @length: Number of bytes to write
+ * @msg: Write data buffer
+ */
+u8 cros_ec_lpc_write_bytes(unsigned int offset, unsigned int length, u8 *msg);
+
+/**
+ * cros_ec_lpc_reg_init
+ *
+ * Initialize register I/O.
+ */
+void cros_ec_lpc_reg_init(void);
+
+/**
+ * cros_ec_lpc_reg_destroy
+ *
+ * Cleanup reg I/O.
+ */
+void cros_ec_lpc_reg_destroy(void);
+
+#endif /* __LINUX_MFD_CROS_EC_REG_H */