Staging: dt3155: fix coding style issues in dt3155_io.c

This fixes up the sparse and coding style issues found in the
dt3155_io.c file.

No code is changed, only formatting and removing unused code.

Cc: Scott Smedley <ss@aao.gov.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/dt3155/dt3155_io.c

 /*
+ * Copyright 1996,2002,2005 Gregory D. Hager, Alfred A. Rizzi, Noah J. Cowan,
+ *			    Jason Lapenta, Scott Smedley
+ *
+ * This file is part of the DT3155 Device Driver.
+ *
+ * The DT3155 Device Driver 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 2 of the License, or (at your
+ * option) any later version.
+ *
+ * The DT3155 Device Driver 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.
+ */
 
-Copyright 1996,2002,2005 Gregory D. Hager, Alfred A. Rizzi, Noah J. Cowan,
-                         Jason Lapenta, Scott Smedley
-
-This file is part of the DT3155 Device Driver.
-
-The DT3155 Device Driver 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 2 of the
-License, or (at your option) any later version.
-
-The DT3155 Device Driver 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.
-
-You should have received a copy of the GNU General Public License
-along with the DT3155 Device Driver; if not, write to the Free
-Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
-MA 02111-1307 USA
-
-
--- Changes --
-
-  Date     Programmer   Description of changes made
-  -------------------------------------------------------------------
-  10-Oct-2001 SS       port to 2.4 kernel.
-  24-Jul-2002 SS       GPL licence.
-  26-Jul-2002 SS       Bug fix: timing logic was wrong.
-  08-Aug-2005 SS       port to 2.6 kernel.
-
-*/
-
-/* This file provides some basic register io routines.  It is modified
-   from demo code provided by Data Translations. */
-
-#ifdef __KERNEL__
-#include <asm/delay.h>
-#endif
-
-#if 0
-#include <sys/param.h>
-#include <sys/time.h>
-#include <unistd.h>
-#endif
+/*
+ * This file provides some basic register io routines.  It is modified from
+ * demo code provided by Data Translations.
+ */
 
+#include <linux/delay.h>
 #include "dt3155.h"
 #include "dt3155_io.h"
 #include "dt3155_drv.h"
 
-#ifndef __KERNEL__
-#include <stdio.h>
-#endif
-
 
 /****** local copies of board's 32 bit registers ******/
 u64 even_dma_start_r;	/*  bit 0 should always be 0 */
@@ -98,77 +70,42 @@ u8                 i2c_dig_out;
 u8 i2c_pm_lut_addr;
 u8 i2c_pm_lut_data;
 
-
-// return the time difference (in microseconds) b/w <a> & <b>.
-long elapsed2 (const struct timeval *pStart, const struct timeval *pEnd)
-{
-	long i = (pEnd->tv_sec - pStart->tv_sec) * 1000000;
-	i += pEnd->tv_usec - pStart->tv_usec;
-	return i;
-}
-
-/***********************************************************************
- wait_ibsyclr()
-
- This function handles read/write timing and r/w timeout error
-
-     Returns TRUE  if NEW_CYCLE clears
-     Returns FALSE if NEW_CYCLE doesn't clear in roughly 3 msecs,
-             otherwise returns 0
-
-***********************************************************************/
-int wait_ibsyclr(u8 * lpReg)
+/*
+ * wait_ibsyclr()
+ *
+ * This function handles read/write timing and r/w timeout error
+ *
+ * Returns TRUE  if NEW_CYCLE clears
+ * Returns FALSE if NEW_CYCLE doesn't clear in roughly 3 msecs, otherwise
+ * returns 0
+ */
+static int wait_ibsyclr(u8 *lpReg)
 {
 	/* wait 100 microseconds */
-
-#ifdef __KERNEL__
 	udelay(100L);
 	/* __delay(loops_per_sec/10000); */
-  if (iic_csr2_r.fld.NEW_CYCLE )
-    { /*  if NEW_CYCLE didn't clear */
+	if (iic_csr2_r.fld.NEW_CYCLE) {
+		/* if NEW_CYCLE didn't clear */
 		/* TIMEOUT ERROR */
 		dt3155_errno = DT_ERR_I2C_TIMEOUT;
 		return FALSE;
-    }
-  else
+	} else
 		return TRUE;	/* no error */
-#else
-  struct timeval StartTime;
-  struct timeval EndTime;
-
-  const int to_3ms = 3000;  /* time out of 3ms = 3000us */
-
-  gettimeofday( &StartTime, NULL );
-  do {
-    /* get new iic_csr2 value: */
-    ReadMReg((lpReg + IIC_CSR2), iic_csr2_r.reg);
-    gettimeofday( &EndTime, NULL );
-  }
-  while ((elapsed2(&StartTime, &EndTime) < to_3ms) && iic_csr2_r.fld.NEW_CYCLE);
-
-  if (iic_csr2_r.fld.NEW_CYCLE )
-    { /*  if NEW_CYCLE didn't clear */
-      printf("Timed out waiting for NEW_CYCLE to clear!");
-      return FALSE;
-    }
-  else
-    return TRUE;        /*  no  error */
-#endif
 }
 
-/***********************************************************************
- WriteI2C()
-
- This function handles writing to 8-bit DT3155 registers
-
-   1st parameter is pointer to 32-bit register base address
-   2nd parameter is reg. index;
-   3rd is value to be written
-
-   Returns    TRUE   -  Successful completion
-              FALSE  -  Timeout error - cycle did not complete!
-***********************************************************************/
-int WriteI2C (u8 * lpReg, u_short wIregIndex, u8 byVal)
+/*
+ * WriteI2C()
+ *
+ * This function handles writing to 8-bit DT3155 registers
+ *
+ * 1st parameter is pointer to 32-bit register base address
+ * 2nd parameter is reg. index;
+ * 3rd is value to be written
+ *
+ * Returns TRUE   -  Successful completion
+ *         FALSE  -  Timeout error - cycle did not complete!
+ */
+int WriteI2C(u8 *lpReg, u_short wIregIndex, u8 byVal)
 {
 	int writestat;	/* status for return */
 
@@ -176,34 +113,36 @@ int WriteI2C (u8 * lpReg, u_short wIregIndex, u8 byVal)
 
 	ReadMReg((lpReg + IIC_CSR2), iic_csr2_r.reg);
 
-    iic_csr2_r.fld.DIR_RD    = 0;           /*  for write operation */
-    iic_csr2_r.fld.DIR_ADDR  = wIregIndex;  /*  I2C address of I2C register: */
-    iic_csr2_r.fld.DIR_WR_DATA = byVal;     /*  8 bit data to be written to I2C reg */
-    iic_csr2_r.fld.NEW_CYCLE   = 1;         /*  will start a direct I2C cycle: */
+	/* for write operation */
+	iic_csr2_r.fld.DIR_RD      = 0;
+	/* I2C address of I2C register: */
+	iic_csr2_r.fld.DIR_ADDR    = wIregIndex;
+	/* 8 bit data to be written to I2C reg */
+	iic_csr2_r.fld.DIR_WR_DATA = byVal;
+	/* will start a direct I2C cycle: */
+	iic_csr2_r.fld.NEW_CYCLE   = 1;
 
 	/* xfer union data into 32 bit IIC_CSR2 register */
-
 	WriteMReg((lpReg + IIC_CSR2), iic_csr2_r.reg);
 
 	/* wait for IIC cycle to finish */
-
-    writestat = wait_ibsyclr( lpReg );
-    return writestat;                  /* return with status */
+	writestat = wait_ibsyclr(lpReg);
+	return writestat;
 }
 
-/***********************************************************************
- ReadI2C()
-
- This function handles reading from 8-bit DT3155 registers
-
-   1st parameter is pointer to 32-bit register base address
-   2nd parameter is reg. index;
-   3rd is adrs of value to be read
-
-   Returns    TRUE   -  Successful completion
-              FALSE  -  Timeout error - cycle did not complete!
-***********************************************************************/
-int ReadI2C (u8 * lpReg, u_short wIregIndex, u8 * byVal)
+/*
+ * ReadI2C()
+ *
+ * This function handles reading from 8-bit DT3155 registers
+ *
+ * 1st parameter is pointer to 32-bit register base address
+ * 2nd parameter is reg. index;
+ * 3rd is adrs of value to be read
+ *
+ * Returns TRUE   -  Successful completion
+ *         FALSE  -  Timeout error - cycle did not complete!
+ */
+int ReadI2C(u8 *lpReg, u_short wIregIndex, u8 *byVal)
 {
 	int writestat;	/* status for return */
 
@@ -232,5 +171,5 @@ int ReadI2C (u8 * lpReg, u_short wIregIndex, u8 * byVal)
 	/* now get data u8 out of register */
 	*byVal = (u8) iic_csr1_r.fld.RD_DATA;
 
-  return writestat;   /*  return with status */
+	return writestat;
 }