soft_i2c: move to drivers/i2c

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

1 files changed, 0 insertions, 423 deletions

diff --git a/common/soft_i2c.c b/common/soft_i2c.c
deleted file mode 100644
index 23db2ee..0000000
--- a/common/soft_i2c.c
+++ /dev/null
@@ -1,423 +0,0 @@
-/*
- * (C) Copyright 2001, 2002
- * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program 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.
- *
- * 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- *
- * This has been changed substantially by Gerald Van Baren, Custom IDEAS,
- * vanbaren@cideas.com.  It was heavily influenced by LiMon, written by
- * Neil Russell.
- */
-
-#include <common.h>
-#ifdef	CONFIG_MPC8260			/* only valid for MPC8260 */
-#include <ioports.h>
-#endif
-#ifdef	CONFIG_AT91RM9200		/* need this for the at91rm9200 */
-#include <asm/io.h>
-#include <asm/arch/hardware.h>
-#endif
-#ifdef	CONFIG_IXP425			/* only valid for IXP425 */
-#include <asm/arch/ixp425.h>
-#endif
-#ifdef CONFIG_LPC2292
-#include <asm/arch/hardware.h>
-#endif
-#include <i2c.h>
-
-/* #define	DEBUG_I2C	*/
-
-#ifdef DEBUG_I2C
-DECLARE_GLOBAL_DATA_PTR;
-#endif
-
-
-/*-----------------------------------------------------------------------
- * Definitions
- */
-
-#define RETRIES		0
-
-
-#define I2C_ACK		0		/* PD_SDA level to ack a byte */
-#define I2C_NOACK	1		/* PD_SDA level to noack a byte */
-
-
-#ifdef DEBUG_I2C
-#define PRINTD(fmt,args...)	do {	\
-	if (gd->have_console)		\
-		printf (fmt ,##args);	\
-	} while (0)
-#else
-#define PRINTD(fmt,args...)
-#endif
-
-/*-----------------------------------------------------------------------
- * Local functions
- */
-static void  send_reset	(void);
-static void  send_start	(void);
-static void  send_stop	(void);
-static void  send_ack	(int);
-static int   write_byte	(uchar byte);
-static uchar read_byte	(int);
-
-
-/*-----------------------------------------------------------------------
- * Send a reset sequence consisting of 9 clocks with the data signal high
- * to clock any confused device back into an idle state.  Also send a
- * <stop> at the end of the sequence for belts & suspenders.
- */
-static void send_reset(void)
-{
-#ifdef	CONFIG_MPC8260
-	volatile ioport_t *iop = ioport_addr((immap_t *)CFG_IMMR, I2C_PORT);
-#endif
-#ifdef	CONFIG_8xx
-	volatile immap_t *immr = (immap_t *)CFG_IMMR;
-#endif
-	int j;
-
-	I2C_SCL(1);
-	I2C_SDA(1);
-#ifdef	I2C_INIT
-	I2C_INIT;
-#endif
-	I2C_TRISTATE;
-	for(j = 0; j < 9; j++) {
-		I2C_SCL(0);
-		I2C_DELAY;
-		I2C_DELAY;
-		I2C_SCL(1);
-		I2C_DELAY;
-		I2C_DELAY;
-	}
-	send_stop();
-	I2C_TRISTATE;
-}
-
-/*-----------------------------------------------------------------------
- * START: High -> Low on SDA while SCL is High
- */
-static void send_start(void)
-{
-#ifdef	CONFIG_MPC8260
-	volatile ioport_t *iop = ioport_addr((immap_t *)CFG_IMMR, I2C_PORT);
-#endif
-#ifdef	CONFIG_8xx
-	volatile immap_t *immr = (immap_t *)CFG_IMMR;
-#endif
-
-	I2C_DELAY;
-	I2C_SDA(1);
-	I2C_ACTIVE;
-	I2C_DELAY;
-	I2C_SCL(1);
-	I2C_DELAY;
-	I2C_SDA(0);
-	I2C_DELAY;
-}
-
-/*-----------------------------------------------------------------------
- * STOP: Low -> High on SDA while SCL is High
- */
-static void send_stop(void)
-{
-#ifdef	CONFIG_MPC8260
-	volatile ioport_t *iop = ioport_addr((immap_t *)CFG_IMMR, I2C_PORT);
-#endif
-#ifdef	CONFIG_8xx
-	volatile immap_t *immr = (immap_t *)CFG_IMMR;
-#endif
-
-	I2C_SCL(0);
-	I2C_DELAY;
-	I2C_SDA(0);
-	I2C_ACTIVE;
-	I2C_DELAY;
-	I2C_SCL(1);
-	I2C_DELAY;
-	I2C_SDA(1);
-	I2C_DELAY;
-	I2C_TRISTATE;
-}
-
-
-/*-----------------------------------------------------------------------
- * ack should be I2C_ACK or I2C_NOACK
- */
-static void send_ack(int ack)
-{
-#ifdef	CONFIG_MPC8260
-	volatile ioport_t *iop = ioport_addr((immap_t *)CFG_IMMR, I2C_PORT);
-#endif
-#ifdef	CONFIG_8xx
-	volatile immap_t *immr = (immap_t *)CFG_IMMR;
-#endif
-
-	I2C_SCL(0);
-	I2C_DELAY;
-	I2C_ACTIVE;
-	I2C_SDA(ack);
-	I2C_DELAY;
-	I2C_SCL(1);
-	I2C_DELAY;
-	I2C_DELAY;
-	I2C_SCL(0);
-	I2C_DELAY;
-}
-
-
-/*-----------------------------------------------------------------------
- * Send 8 bits and look for an acknowledgement.
- */
-static int write_byte(uchar data)
-{
-#ifdef	CONFIG_MPC8260
-	volatile ioport_t *iop = ioport_addr((immap_t *)CFG_IMMR, I2C_PORT);
-#endif
-#ifdef	CONFIG_8xx
-	volatile immap_t *immr = (immap_t *)CFG_IMMR;
-#endif
-	int j;
-	int nack;
-
-	I2C_ACTIVE;
-	for(j = 0; j < 8; j++) {
-		I2C_SCL(0);
-		I2C_DELAY;
-		I2C_SDA(data & 0x80);
-		I2C_DELAY;
-		I2C_SCL(1);
-		I2C_DELAY;
-		I2C_DELAY;
-
-		data <<= 1;
-	}
-
-	/*
-	 * Look for an <ACK>(negative logic) and return it.
-	 */
-	I2C_SCL(0);
-	I2C_DELAY;
-	I2C_SDA(1);
-	I2C_TRISTATE;
-	I2C_DELAY;
-	I2C_SCL(1);
-	I2C_DELAY;
-	I2C_DELAY;
-	nack = I2C_READ;
-	I2C_SCL(0);
-	I2C_DELAY;
-	I2C_ACTIVE;
-
-	return(nack);	/* not a nack is an ack */
-}
-
-
-/*-----------------------------------------------------------------------
- * if ack == I2C_ACK, ACK the byte so can continue reading, else
- * send I2C_NOACK to end the read.
- */
-static uchar read_byte(int ack)
-{
-#ifdef	CONFIG_MPC8260
-	volatile ioport_t *iop = ioport_addr((immap_t *)CFG_IMMR, I2C_PORT);
-#endif
-#ifdef	CONFIG_8xx
-	volatile immap_t *immr = (immap_t *)CFG_IMMR;
-#endif
-	int  data;
-	int  j;
-
-	/*
-	 * Read 8 bits, MSB first.
-	 */
-	I2C_TRISTATE;
-	I2C_SDA(1);
-	data = 0;
-	for(j = 0; j < 8; j++) {
-		I2C_SCL(0);
-		I2C_DELAY;
-		I2C_SCL(1);
-		I2C_DELAY;
-		data <<= 1;
-		data |= I2C_READ;
-		I2C_DELAY;
-	}
-	send_ack(ack);
-
-	return(data);
-}
-
-/*=====================================================================*/
-/*                         Public Functions                            */
-/*=====================================================================*/
-
-/*-----------------------------------------------------------------------
- * Initialization
- */
-void i2c_init (int speed, int slaveaddr)
-{
-	/*
-	 * WARNING: Do NOT save speed in a static variable: if the
-	 * I2C routines are called before RAM is initialized (to read
-	 * the DIMM SPD, for instance), RAM won't be usable and your
-	 * system will crash.
-	 */
-	send_reset ();
-}
-
-/*-----------------------------------------------------------------------
- * Probe to see if a chip is present.  Also good for checking for the
- * completion of EEPROM writes since the chip stops responding until
- * the write completes (typically 10mSec).
- */
-int i2c_probe(uchar addr)
-{
-	int rc;
-
-	/*
-	 * perform 1 byte write transaction with just address byte
-	 * (fake write)
-	 */
-	send_start();
-	rc = write_byte ((addr << 1) | 0);
-	send_stop();
-
-	return (rc ? 1 : 0);
-}
-
-/*-----------------------------------------------------------------------
- * Read bytes
- */
-int  i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len)
-{
-	int shift;
-	PRINTD("i2c_read: chip %02X addr %02X alen %d buffer %p len %d\n",
-		chip, addr, alen, buffer, len);
-
-#ifdef CFG_I2C_EEPROM_ADDR_OVERFLOW
-	/*
-	 * EEPROM chips that implement "address overflow" are ones
-	 * like Catalyst 24WC04/08/16 which has 9/10/11 bits of
-	 * address and the extra bits end up in the "chip address"
-	 * bit slots. This makes a 24WC08 (1Kbyte) chip look like
-	 * four 256 byte chips.
-	 *
-	 * Note that we consider the length of the address field to
-	 * still be one byte because the extra address bits are
-	 * hidden in the chip address.
-	 */
-	chip |= ((addr >> (alen * 8)) & CFG_I2C_EEPROM_ADDR_OVERFLOW);
-
-	PRINTD("i2c_read: fix addr_overflow: chip %02X addr %02X\n",
-		chip, addr);
-#endif
-
-	/*
-	 * Do the addressing portion of a write cycle to set the
-	 * chip's address pointer.  If the address length is zero,
-	 * don't do the normal write cycle to set the address pointer,
-	 * there is no address pointer in this chip.
-	 */
-	send_start();
-	if(alen > 0) {
-		if(write_byte(chip << 1)) {	/* write cycle */
-			send_stop();
-			PRINTD("i2c_read, no chip responded %02X\n", chip);
-			return(1);
-		}
-		shift = (alen-1) * 8;
-		while(alen-- > 0) {
-			if(write_byte(addr >> shift)) {
-				PRINTD("i2c_read, address not <ACK>ed\n");
-				return(1);
-			}
-			shift -= 8;
-		}
-		send_stop();	/* reportedly some chips need a full stop */
-		send_start();
-	}
-	/*
-	 * Send the chip address again, this time for a read cycle.
-	 * Then read the data.  On the last byte, we do a NACK instead
-	 * of an ACK(len == 0) to terminate the read.
-	 */
-	write_byte((chip << 1) | 1);	/* read cycle */
-	while(len-- > 0) {
-		*buffer++ = read_byte(len == 0);
-	}
-	send_stop();
-	return(0);
-}
-
-/*-----------------------------------------------------------------------
- * Write bytes
- */
-int  i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len)
-{
-	int shift, failures = 0;
-
-	PRINTD("i2c_write: chip %02X addr %02X alen %d buffer %p len %d\n",
-		chip, addr, alen, buffer, len);
-
-	send_start();
-	if(write_byte(chip << 1)) {	/* write cycle */
-		send_stop();
-		PRINTD("i2c_write, no chip responded %02X\n", chip);
-		return(1);
-	}
-	shift = (alen-1) * 8;
-	while(alen-- > 0) {
-		if(write_byte(addr >> shift)) {
-			PRINTD("i2c_write, address not <ACK>ed\n");
-			return(1);
-		}
-		shift -= 8;
-	}
-
-	while(len-- > 0) {
-		if(write_byte(*buffer++)) {
-			failures++;
-		}
-	}
-	send_stop();
-	return(failures);
-}
-
-/*-----------------------------------------------------------------------
- * Read a register
- */
-uchar i2c_reg_read(uchar i2c_addr, uchar reg)
-{
-	uchar buf;
-
-	i2c_read(i2c_addr, reg, 1, &buf, 1);
-
-	return(buf);
-}
-
-/*-----------------------------------------------------------------------
- * Write a register
- */
-void i2c_reg_write(uchar i2c_addr, uchar reg, uchar val)
-{
-	i2c_write(i2c_addr, reg, 1, &val, 1);
-}