cros_ec: Implement I2C pass-through

[karo-tx-uboot.git] / include / cros_ec.h

diff --git a/include/cros_ec.h b/include/cros_ec.h
index 1199d923354c30e8a3926a80e52b6d50d6778784..1e4d8db96b7889e32586c665e001513523357b48 100644 (file)
--- a/include/cros_ec.h
+++ b/include/cros_ec.h
@@ -20,6 +20,7 @@ enum cros_ec_interface_t {
        CROS_EC_IF_SPI,
        CROS_EC_IF_I2C,
        CROS_EC_IF_LPC, /* Intel Low Pin Count interface */
+       CROS_EC_IF_SANDBOX,
 };
 
 /* Our configuration information */
@@ -237,6 +238,7 @@ struct cros_ec_dev *board_get_cros_ec_dev(void);
 int cros_ec_i2c_init(struct cros_ec_dev *dev, const void *blob);
 int cros_ec_spi_init(struct cros_ec_dev *dev, const void *blob);
 int cros_ec_lpc_init(struct cros_ec_dev *dev, const void *blob);
+int cros_ec_sandbox_init(struct cros_ec_dev *dev, const void *blob);
 
 /**
  * Read information from the fdt for the i2c cros_ec interface
@@ -256,6 +258,15 @@ int cros_ec_i2c_decode_fdt(struct cros_ec_dev *dev, const void *blob);
  */
 int cros_ec_spi_decode_fdt(struct cros_ec_dev *dev, const void *blob);
 
+/**
+ * Read information from the fdt for the sandbox cros_ec interface
+ *
+ * @param dev          CROS-EC device
+ * @param blob         Device tree blob
+ * @return 0 if ok, -1 if we failed to read all required information
+ */
+int cros_ec_sandbox_decode_fdt(struct cros_ec_dev *dev, const void *blob);
+
 /**
  * Check whether the LPC interface supports new-style commands.
  *
@@ -311,6 +322,21 @@ int cros_ec_spi_command(struct cros_ec_dev *dev, uint8_t cmd, int cmd_version,
                     const uint8_t *dout, int dout_len,
                     uint8_t **dinp, int din_len);
 
+/**
+ * Send a packet to a CROS-EC device and return the response packet.
+ *
+ * Expects the request packet to be stored in dev->dout.  Stores the response
+ * packet in dev->din.
+ *
+ * @param dev          CROS-EC device
+ * @param out_bytes    Size of request packet to output
+ * @param in_bytes     Maximum size of response packet to receive
+ * @return number of bytes in response packet, or <0 on error
+ */
+int cros_ec_spi_packet(struct cros_ec_dev *dev, int out_bytes, int in_bytes);
+int cros_ec_sandbox_packet(struct cros_ec_dev *dev, int out_bytes,
+                          int in_bytes);
+
 /**
  * Dump a block of data for a command.
  *
@@ -467,4 +493,26 @@ int cros_ec_get_error(void);
  */
 int cros_ec_decode_ec_flash(const void *blob, struct fdt_cros_ec *config);
 
+/**
+ * Check the current keyboard state, in case recovery mode is requested.
+ * This function is for sandbox only.
+ *
+ * @param ec           CROS-EC device
+ */
+void cros_ec_check_keyboard(struct cros_ec_dev *dev);
+
+/*
+ * Tunnel an I2C transfer to the EC
+ *
+ * @param dev          CROS-EC device
+ * @param chip         Chip address (7-bit I2C address)
+ * @param addr         Register address to read/write
+ * @param alen         Length of register address in bytes
+ * @param buffer       Buffer containing data to read/write
+ * @param len          Length of buffer
+ * @param is_read      1 if this is a read, 0 if this is a write
+ */
+int cros_ec_i2c_xfer(struct cros_ec_dev *dev, uchar chip, uint addr,
+                    int alen, uchar *buffer, int len, int is_read);
+
 #endif