indent code coming from depthcharge and add missing acknowledgements

grub-core/term/arm/cros.c

@@ -4,6 +4,8 @@
  *  Copyright (C) 2012  Google Inc.
  *  Copyright (C) 2016  Free Software Foundation, Inc.
  *
+ *  This is based on depthcharge code.
+ *
  *  GRUB is free software: you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation, either version 3 of the License, or

grub-core/term/arm/cros_ec.c

@@ -4,6 +4,8 @@
  *  Copyright (C) 2012  Google Inc.
  *  Copyright (C) 2016  Free Software Foundation, Inc.
  *
+ *  This is based on depthcharge code.
+ *
  *  GRUB is free software: you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation, either version 3 of the License, or
@@ -102,25 +104,30 @@ static const uint8_t EcFramingByte = 0xec;
 
 static uint64_t last_transfer;
 
-static void stop_bus(void)
+static void
+stop_bus (void)
 {
   spi_stop ();
   last_transfer = grub_get_time_us ();
 }
 
-static int wait_for_frame(void)
+static int
+wait_for_frame (void)
 {
   uint64_t start = grub_get_time_us ();
   uint8_t byte;
-	do {
+  do
+    {
       if (spi_read (&byte, 1))
 	return -1;
       if (byte != EcFramingByte &&
-			grub_get_time_us() - start > FramingTimeoutUs) {
+	  grub_get_time_us () - start > FramingTimeoutUs)
+	{
 	  grub_dprintf ("cros", "Timeout waiting for framing byte.\n");
 	  return -1;
 	}
-	} while (byte != EcFramingByte);
+    }
+  while (byte != EcFramingByte);
   return 0;
 }
 
@@ -131,7 +138,8 @@ static int wait_for_frame(void)
  * @param size	Size of data block in bytes
  * @return checksum value (0 to 255)
  */
-static uint8_t cros_ec_calc_checksum(const void *data, int size)
+static uint8_t
+cros_ec_calc_checksum (const void *data, int size)
 {
   uint8_t csum;
   const uint8_t *bytes = data;
@@ -142,23 +150,24 @@ static uint8_t cros_ec_calc_checksum(const void *data, int size)
   return csum & 0xff;
 }
 
-enum {
-	// response, arglen
+enum
+{
+  /* response, arglen */
   CROS_EC_SPI_IN_HDR_SIZE = 2,
-	// version, cmd, arglen
+  /* version, cmd, arglen */
   CROS_EC_SPI_OUT_HDR_SIZE = 3
 };
 
 static grub_uint8_t busbuf[256];
 #define MSG_BYTES ((int)sizeof (busbuf))
 
-static int ec_command(int cmd, int cmd_version,
-		      const void *dout, int dout_len,
-		      void *din, int din_len)
+static int
+ec_command (int cmd, int cmd_version,
+	    const void *dout, int dout_len, void *din, int din_len)
 {
   uint8_t *bytes;
 
-	// Header + data + checksum.
+  /* Header + data + checksum. */
   uint32_t out_bytes = CROS_EC_SPI_OUT_HDR_SIZE + dout_len + 1;
   uint32_t in_bytes = CROS_EC_SPI_IN_HDR_SIZE + din_len + 1;
 
@@ -166,16 +175,18 @@ static int ec_command(int cmd, int cmd_version,
    * Sanity-check I/O sizes given transaction overhead in internal
    * buffers.
    */
-	if (out_bytes > MSG_BYTES) {
+  if (out_bytes > MSG_BYTES)
+    {
       grub_dprintf ("cros", "Cannot send %d bytes\n", dout_len);
       return -1;
     }
-	if (in_bytes > MSG_BYTES) {
+  if (in_bytes > MSG_BYTES)
+    {
       grub_dprintf ("cros", "Cannot receive %d bytes\n", din_len);
       return -1;
     }
 
-	// Prepare the output.
+  /* Prepare the output. */
   bytes = busbuf;
   *bytes++ = EC_CMD_VERSION0 + cmd_version;
   *bytes++ = cmd;
@@ -192,40 +203,44 @@ static int ec_command(int cmd, int cmd_version,
   if (spi_start ())
     return -1;
 
-	// Allow EC to ramp up clock after being awoken.
-	// See chrome-os-partner:32223 for more details.
+  /* Allow EC to ramp up clock after being awoken. */
+  /* See chrome-os-partner:32223 for more details. */
   grub_microsleep (100);
 
-	if (spi_send(busbuf, out_bytes)) {
+  if (spi_send (busbuf, out_bytes))
+    {
       stop_bus ();
       return -1;
     }
 
-	// Wait until the EC is ready.
-	if (wait_for_frame()) {
+  /* Wait until the EC is ready. */
+  if (wait_for_frame ())
+    {
       stop_bus ();
       return -1;
     }
 
-	// Read the response code and the data length.
+  /* Read the response code and the data length. */
   bytes = busbuf;
-	if (spi_read(bytes, 2)) {
+  if (spi_read (bytes, 2))
+    {
       stop_bus ();
       return -1;
     }
   uint8_t result = *bytes++;
   uint8_t length = *bytes++;
 
-	// Make sure there's enough room for the data.
-	if (CROS_EC_SPI_IN_HDR_SIZE + length + 1 > MSG_BYTES) {
-		grub_dprintf("cros", "Received length %#02x too large\n",
-			     length);
+  /* Make sure there's enough room for the data. */
+  if (CROS_EC_SPI_IN_HDR_SIZE + length + 1 > MSG_BYTES)
+    {
+      grub_dprintf ("cros", "Received length %#02x too large\n", length);
       stop_bus ();
       return -1;
     }
 
-	// Read the data and the checksum, and finish up.
-	if (spi_read(bytes, length + 1)) {
+  /* Read the data and the checksum, and finish up. */
+  if (spi_read (bytes, length + 1))
+    {
       stop_bus ();
       return -1;
     }
@@ -233,8 +248,9 @@ static int ec_command(int cmd, int cmd_version,
   int expected = *bytes++;
   stop_bus ();
 
-	// Check the integrity of the response.
-	if (result != 0) {
+  /* Check the integrity of the response. */
+  if (result != 0)
+    {
       grub_dprintf ("cros", "Received bad result code %d\n", result);
       return -result;
     }
@@ -242,18 +258,19 @@ static int ec_command(int cmd, int cmd_version,
   int csum = cros_ec_calc_checksum (busbuf,
 				    CROS_EC_SPI_IN_HDR_SIZE + length);
 
-	if (csum != expected) {
+  if (csum != expected)
+    {
       grub_dprintf ("cros", "Invalid checksum rx %#02x, calced %#02x\n",
 		    expected, csum);
       return -1;
     }
 
-	// If the caller wants the response, copy it out for them.
+  /* If the caller wants the response, copy it out for them. */
   if (length < din_len)
     din_len = length;
-	if (din) {
-		memcpy(din, (uint8_t *)busbuf + CROS_EC_SPI_IN_HDR_SIZE,
-		       din_len);
+  if (din)
+    {
+      memcpy (din, (uint8_t *) busbuf + CROS_EC_SPI_IN_HDR_SIZE, din_len);
     }
 
   return din_len;