Patch by Steven Scholz, 06 Apr 2005:

- creating SoC subdir for Atmel AT91RM9200 cpu/arm920t/at91rm9200
- moving code out of cpu/at91rm9200 into cpu/arm920t/at91rm9200

1 files changed, 0 insertions, 192 deletions

diff --git a/cpu/at91rm9200/i2c.c b/cpu/at91rm9200/i2c.c
deleted file mode 100644
index 433dd32..0000000
--- a/cpu/at91rm9200/i2c.c
+++ /dev/null
@@ -1,192 +0,0 @@
-/*
- *  i2c Support for Atmel's AT91RM9200 Two-Wire Interface
- *
- *  (c) Rick Bronson
- *
- *  Borrowed heavily from original work by:
- *  Copyright (c) 2000 Philip Edelbrock <phil@stimpy.netroedge.com>
- *
- *  Modified to work with u-boot by (C) 2004 Gary Jennejohn garyj@denx.de
- *
- *  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., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
-*/
-#include <common.h>
-
-#ifdef CONFIG_HARD_I2C
-
-#include <i2c.h>
-#include <asm/io.h>
-#include <asm/arch/hardware.h>
-
-#include <at91rm9200_i2c.h>
-
-/* define DEBUG */
-
-/*
- * Poll the i2c status register until the specified bit is set.
- * Returns 0 if timed out (100 msec)
- */
-static short at91_poll_status(AT91PS_TWI twi, unsigned long bit) {
-	int loop_cntr = 10000;
-	do {
-		udelay(10);
-	} while (!(twi->TWI_SR & bit) && (--loop_cntr > 0));
-
-	return (loop_cntr > 0);
-}
-
-/*
- * Generic i2c master transfer entrypoint
- *
- * rw == 1 means that this is a read
- */
-static int
-at91_xfer(unsigned char chip, unsigned int addr, int alen,
-						unsigned char *buffer, int len, int rw)
-{
-	AT91PS_TWI twi = (AT91PS_TWI) AT91_TWI_BASE;
-	int length;
-	unsigned char *buf;
-	/* Set the TWI Master Mode Register */
-	twi->TWI_MMR = (chip << 16) | (alen << 8)
-		| ((rw == 1) ? AT91C_TWI_MREAD : 0);
-
-	/* Set TWI Internal Address Register with first messages data field */
-	/* only one address byte is supported  */
-	if (alen > 0)
-		twi->TWI_IADR = addr & 0xff;
-
-	length = len;
-	buf = buffer;
-	if (length && buf) {	/* sanity check */
-		if (rw) {
-			twi->TWI_CR = AT91C_TWI_START;
-			while (length--) {
-				if (!length)
-					twi->TWI_CR = AT91C_TWI_STOP;
-				/* Wait until transfer is finished */
-				if (!at91_poll_status(twi, AT91C_TWI_RXRDY)) {
-					debug ("at91_i2c: timeout 1\n");
-					return 1;
-				}
-				*buf++ = twi->TWI_RHR;
-			}
-			if (!at91_poll_status(twi, AT91C_TWI_TXCOMP)) {
-				debug ("at91_i2c: timeout 2\n");
-				return 1;
-			}
-		} else {
-			twi->TWI_CR = AT91C_TWI_START;
-			while (length--) {
-				twi->TWI_THR = *buf++;
-				if (!length)
-					twi->TWI_CR = AT91C_TWI_STOP;
-				if (!at91_poll_status(twi, AT91C_TWI_TXRDY)) {
-					debug ("at91_i2c: timeout 3\n");
-					return 1;
-				}
-			}
-			/* Wait until transfer is finished */
-			if (!at91_poll_status(twi, AT91C_TWI_TXCOMP)) {
-				debug ("at91_i2c: timeout 4\n");
-				return 1;
-			}
-		}
-	}
-	return 0;
-}
-
-int
-i2c_probe(unsigned char chip)
-{
-	char buffer[1];
-
-	return at91_xfer(chip, 0, 0, buffer, 1, 1);
-}
-
-int
-i2c_read (unsigned char chip, unsigned int addr, int alen,
-	  unsigned char *buffer, int len)
-{
-#ifdef CFG_I2C_EEPROM_ADDR_OVERFLOW
-	/* we only allow one address byte */
-	if (alen > 1)
-		return 1;
-	/* XXX assume an ATMEL AT24C16 */
-	if (alen == 1) {
-#if 0 /* EEPROM code already sets this correctly */
-		chip |= (addr >> 8) & 0xff;
-#endif
-		addr = addr & 0xff;
-	}
-#endif
-	return at91_xfer(chip, addr, alen, buffer, len, 1);
-}
-
-int
-i2c_write(unsigned char chip, unsigned int addr, int alen,
-							unsigned char *buffer, int len)
-{
-	int i;
-	unsigned char *buf;
-
-#ifdef CFG_I2C_EEPROM_ADDR_OVERFLOW
-	/* we only allow one address byte */
-	if (alen > 1)
-		return 1;
-	/* XXX assume an ATMEL AT24C16 */
-	if (alen == 1) {
-		buf = buffer;
-		/* do single byte writes */
-		for (i = 0; i < len; i++) {
-#if 0 /* EEPROM code already sets this correctly */
-			chip |= (addr >> 8) & 0xff;
-#endif
-			addr = addr & 0xff;
-			if (at91_xfer(chip, addr, alen, buf++, 1, 0))
-				return 1;
-			addr++;
-		}
-		return 0;
-	}
-#endif
-	return at91_xfer(chip, addr, alen, buffer, len, 0);
-}
-
-/*
- * Main initialization routine
- */
-void
-i2c_init(int speed, int slaveaddr)
-{
-	AT91PS_TWI twi = (AT91PS_TWI) AT91_TWI_BASE;
-
-	*AT91C_PIOA_PDR = AT91C_PA25_TWD | AT91C_PA26_TWCK;
-	*AT91C_PIOA_ASR = AT91C_PA25_TWD | AT91C_PA26_TWCK;
-	*AT91C_PIOA_MDER = AT91C_PA25_TWD | AT91C_PA26_TWCK;
-	*AT91C_PMC_PCER = 1 << AT91C_ID_TWI;		/* enable peripheral clock */
-
-	twi->TWI_IDR = 0x3ff;				/* Disable all interrupts */
-	twi->TWI_CR = AT91C_TWI_SWRST;			/* Reset peripheral */
-	twi->TWI_CR = AT91C_TWI_MSEN | AT91C_TWI_SVDIS;	/* Set Master mode */
-
-	/* Here, CKDIV = 1 and CHDIV=CLDIV  ==> CLDIV = CHDIV = 1/4*((Fmclk/FTWI) -6) */
-	twi->TWI_CWGR = AT91C_TWI_CKDIV1 | AT91C_TWI_CLDIV3 | (AT91C_TWI_CLDIV3 << 8);
-
-	debug ("Found AT91 i2c\n");
-	return;
-}
-#endif /* CONFIG_HARD_I2C */