pxa: move i2c driver to the common place

For better sharing with other platform other than pxa's,
it is more convenient to put the driver to the common place.

Acked-by: Heiko Schocher <hs@denx.de>
Acked-by: Prafulla Wadaskar <prafulla@marvell.com>
Signed-off-by: Lei Wen <leiwen@marvell.com>

1 files changed, 0 insertions, 469 deletions

diff --git a/arch/arm/cpu/pxa/i2c.c b/arch/arm/cpu/pxa/i2c.c
deleted file mode 100644
index 7aa49ae4a0..0000000000
--- a/arch/arm/cpu/pxa/i2c.c
+++ /dev/null
@@ -1,469 +0,0 @@
-/*
- * (C) Copyright 2000
- * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
- *
- * (C) Copyright 2000 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
- * Marius Groeger <mgroeger@sysgo.de>
- *
- * (C) Copyright 2003 Pengutronix e.K.
- * Robert Schwebel <r.schwebel@pengutronix.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
- *
- * Back ported to the 8xx platform (from the 8260 platform) by
- * Murray.Jensen@cmst.csiro.au, 27-Jan-01.
- */
-
-/* FIXME: this file is PXA255 specific! What about other XScales? */
-
-#include <common.h>
-#include <asm/io.h>
-
-#ifdef CONFIG_HARD_I2C
-
-/*
- *	- CONFIG_SYS_I2C_SPEED
- *	- I2C_PXA_SLAVE_ADDR
- */
-
-#include <asm/arch/hardware.h>
-#include <asm/arch/pxa-regs.h>
-#include <i2c.h>
-
-/*#define	DEBUG_I2C	1	/###* activate local debugging output  */
-#define I2C_PXA_SLAVE_ADDR	0x1	/* slave pxa unit address           */
-
-#if (CONFIG_SYS_I2C_SPEED == 400000)
-#define I2C_ICR_INIT	(ICR_FM | ICR_BEIE | ICR_IRFIE | ICR_ITEIE | ICR_GCD | ICR_SCLE)
-#else
-#define I2C_ICR_INIT	(ICR_BEIE | ICR_IRFIE | ICR_ITEIE | ICR_GCD | ICR_SCLE)
-#endif
-
-#define I2C_ISR_INIT		0x7FF
-
-#ifdef DEBUG_I2C
-#define PRINTD(x) printf x
-#else
-#define PRINTD(x)
-#endif
-
-
-/* Shall the current transfer have a start/stop condition? */
-#define I2C_COND_NORMAL		0
-#define I2C_COND_START		1
-#define I2C_COND_STOP		2
-
-/* Shall the current transfer be ack/nacked or being waited for it? */
-#define I2C_ACKNAK_WAITACK	1
-#define I2C_ACKNAK_SENDACK	2
-#define I2C_ACKNAK_SENDNAK	4
-
-/* Specify who shall transfer the data (master or slave) */
-#define I2C_READ		0
-#define I2C_WRITE		1
-
-/* All transfers are described by this data structure */
-struct i2c_msg {
-	u8 condition;
-	u8 acknack;
-	u8 direction;
-	u8 data;
-};
-
-
-/**
- * i2c_pxa_reset: - reset the host controller
- *
- */
-
-static void i2c_reset( void )
-{
-	writel(readl(ICR) & ~ICR_IUE, ICR);	/* disable unit */
-	writel(readl(ICR) | ICR_UR, ICR);	/* reset the unit */
-	udelay(100);
-	writel(readl(ICR) & ~ICR_IUE, ICR);	/* disable unit */
-#ifdef CONFIG_CPU_MONAHANS
-	/* | CKENB_1_PWM1 | CKENB_0_PWM0); */
-	writel(readl(CKENB) | (CKENB_4_I2C), CKENB);
-#else /* CONFIG_CPU_MONAHANS */
-	/* set the global I2C clock on */
-	writel(readl(CKEN) | CKEN14_I2C, CKEN);
-#endif
-	writel(I2C_PXA_SLAVE_ADDR, ISAR);	/* set our slave address */
-	writel(I2C_ICR_INIT, ICR);		/* set control reg values */
-	writel(I2C_ISR_INIT, ISR);		/* set clear interrupt bits */
-	writel(readl(ICR) | ICR_IUE, ICR);	/* enable unit */
-	udelay(100);
-}
-
-
-/**
- * i2c_isr_set_cleared: - wait until certain bits of the I2C status register
- *	                  are set and cleared
- *
- * @return: 1 in case of success, 0 means timeout (no match within 10 ms).
- */
-static int i2c_isr_set_cleared( unsigned long set_mask, unsigned long cleared_mask )
-{
-	int timeout = 10000;
-
-	while( ((ISR & set_mask)!=set_mask) || ((ISR & cleared_mask)!=0) ){
-		udelay( 10 );
-		if( timeout-- < 0 ) return 0;
-	}
-
-	return 1;
-}
-
-
-/**
- * i2c_transfer: - Transfer one byte over the i2c bus
- *
- * This function can tranfer a byte over the i2c bus in both directions.
- * It is used by the public API functions.
- *
- * @return:  0: transfer successful
- *          -1: message is empty
- *          -2: transmit timeout
- *          -3: ACK missing
- *          -4: receive timeout
- *          -5: illegal parameters
- *          -6: bus is busy and couldn't be aquired
- */
-int i2c_transfer(struct i2c_msg *msg)
-{
-	int ret;
-
-	if (!msg)
-		goto transfer_error_msg_empty;
-
-	switch(msg->direction) {
-
-	case I2C_WRITE:
-
-		/* check if bus is not busy */
-		if (!i2c_isr_set_cleared(0,ISR_IBB))
-			goto transfer_error_bus_busy;
-
-		/* start transmission */
-		writel(readl(ICR) & ~ICR_START, ICR);
-		writel(readl(ICR) & ~ICR_STOP, ICR);
-		writel(msg->data, IDBR);
-		if (msg->condition == I2C_COND_START)
-			writel(readl(ICR) | ICR_START, ICR);
-		if (msg->condition == I2C_COND_STOP)
-			writel(readl(ICR) | ICR_STOP, ICR);
-		if (msg->acknack == I2C_ACKNAK_SENDNAK)
-			writel(readl(ICR) | ICR_ACKNAK, ICR);
-		if (msg->acknack == I2C_ACKNAK_SENDACK)
-			writel(readl(ICR) & ~ICR_ACKNAK, ICR);
-		writel(readl(ICR) & ~ICR_ALDIE, ICR);
-		writel(readl(ICR) | ICR_TB, ICR);
-
-		/* transmit register empty? */
-		if (!i2c_isr_set_cleared(ISR_ITE,0))
-			goto transfer_error_transmit_timeout;
-
-		/* clear 'transmit empty' state */
-		writel(readl(ISR) | ISR_ITE, ISR);
-
-		/* wait for ACK from slave */
-		if (msg->acknack == I2C_ACKNAK_WAITACK)
-			if (!i2c_isr_set_cleared(0,ISR_ACKNAK))
-				goto transfer_error_ack_missing;
-		break;
-
-	case I2C_READ:
-
-		/* check if bus is not busy */
-		if (!i2c_isr_set_cleared(0,ISR_IBB))
-			goto transfer_error_bus_busy;
-
-		/* start receive */
-		writel(readl(ICR) & ~ICR_START, ICR);
-		writel(readl(ICR) & ~ICR_STOP, ICR);
-		if (msg->condition == I2C_COND_START)
-			writel(readl(ICR) | ICR_START, ICR);
-		if (msg->condition == I2C_COND_STOP)
-			writel(readl(ICR) | ICR_STOP, ICR);
-		if (msg->acknack == I2C_ACKNAK_SENDNAK)
-			writel(readl(ICR) | ICR_ACKNAK, ICR);
-		if (msg->acknack == I2C_ACKNAK_SENDACK)
-			writel(readl(ICR) & ~ICR_ACKNAK, ICR);
-		writel(readl(ICR) & ~ICR_ALDIE, ICR);
-		writel(readl(ICR) | ICR_TB, ICR);
-
-		/* receive register full? */
-		if (!i2c_isr_set_cleared(ISR_IRF,0))
-			goto transfer_error_receive_timeout;
-
-		msg->data = readl(IDBR);
-
-		/* clear 'receive empty' state */
-		writel(readl(ISR) | ISR_IRF, ISR);
-
-		break;
-
-	default:
-
-		goto transfer_error_illegal_param;
-
-	}
-
-	return 0;
-
-transfer_error_msg_empty:
-		PRINTD(("i2c_transfer: error: 'msg' is empty\n"));
-		ret = -1; goto i2c_transfer_finish;
-
-transfer_error_transmit_timeout:
-		PRINTD(("i2c_transfer: error: transmit timeout\n"));
-		ret = -2; goto i2c_transfer_finish;
-
-transfer_error_ack_missing:
-		PRINTD(("i2c_transfer: error: ACK missing\n"));
-		ret = -3; goto i2c_transfer_finish;
-
-transfer_error_receive_timeout:
-		PRINTD(("i2c_transfer: error: receive timeout\n"));
-		ret = -4; goto i2c_transfer_finish;
-
-transfer_error_illegal_param:
-		PRINTD(("i2c_transfer: error: illegal parameters\n"));
-		ret = -5; goto i2c_transfer_finish;
-
-transfer_error_bus_busy:
-		PRINTD(("i2c_transfer: error: bus is busy\n"));
-		ret = -6; goto i2c_transfer_finish;
-
-i2c_transfer_finish:
-		PRINTD(("i2c_transfer: ISR: 0x%04x\n",ISR));
-		i2c_reset();
-		return ret;
-
-}
-
-/* ------------------------------------------------------------------------ */
-/* API Functions                                                            */
-/* ------------------------------------------------------------------------ */
-
-void i2c_init(int speed, int slaveaddr)
-{
-#ifdef CONFIG_SYS_I2C_INIT_BOARD
-	/* call board specific i2c bus reset routine before accessing the   */
-	/* environment, which might be in a chip on that bus. For details   */
-	/* about this problem see doc/I2C_Edge_Conditions.                  */
-	i2c_init_board();
-#endif
-}
-
-
-/**
- * i2c_probe: - Test if a chip answers for a given i2c address
- *
- * @chip:	address of the chip which is searched for
- * @return:	0 if a chip was found, -1 otherwhise
- */
-
-int i2c_probe(uchar chip)
-{
-	struct i2c_msg msg;
-
-	i2c_reset();
-
-	msg.condition = I2C_COND_START;
-	msg.acknack   = I2C_ACKNAK_WAITACK;
-	msg.direction = I2C_WRITE;
-	msg.data      = (chip << 1) + 1;
-	if (i2c_transfer(&msg)) return -1;
-
-	msg.condition = I2C_COND_STOP;
-	msg.acknack   = I2C_ACKNAK_SENDNAK;
-	msg.direction = I2C_READ;
-	msg.data      = 0x00;
-	if (i2c_transfer(&msg)) return -1;
-
-	return 0;
-}
-
-
-/**
- * i2c_read: - Read multiple bytes from an i2c device
- *
- * The higher level routines take into account that this function is only
- * called with len < page length of the device (see configuration file)
- *
- * @chip:	address of the chip which is to be read
- * @addr:	i2c data address within the chip
- * @alen:	length of the i2c data address (1..2 bytes)
- * @buffer:	where to write the data
- * @len:	how much byte do we want to read
- * @return:	0 in case of success
- */
-
-int i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len)
-{
-	struct i2c_msg msg;
-	u8 addr_bytes[3]; /* lowest...highest byte of data address */
-	int ret;
-
-	PRINTD(("i2c_read(chip=0x%02x, addr=0x%02x, alen=0x%02x, len=0x%02x)\n",chip,addr,alen,len));
-
-	i2c_reset();
-
-	/* dummy chip address write */
-	PRINTD(("i2c_read: dummy chip address write\n"));
-	msg.condition = I2C_COND_START;
-	msg.acknack   = I2C_ACKNAK_WAITACK;
-	msg.direction = I2C_WRITE;
-	msg.data      = (chip << 1);
-	msg.data     &= 0xFE;
-	if ((ret=i2c_transfer(&msg))) return -1;
-
-	/*
-	 * send memory address bytes;
-	 * alen defines how much bytes we have to send.
-	 */
-	/*addr &= ((1 << CONFIG_SYS_EEPROM_PAGE_WRITE_BITS)-1); */
-	addr_bytes[0] = (u8)((addr >>  0) & 0x000000FF);
-	addr_bytes[1] = (u8)((addr >>  8) & 0x000000FF);
-	addr_bytes[2] = (u8)((addr >> 16) & 0x000000FF);
-
-	while (--alen >= 0) {
-
-		PRINTD(("i2c_read: send memory word address byte %1d\n",alen));
-		msg.condition = I2C_COND_NORMAL;
-		msg.acknack   = I2C_ACKNAK_WAITACK;
-		msg.direction = I2C_WRITE;
-		msg.data      = addr_bytes[alen];
-		if ((ret=i2c_transfer(&msg))) return -1;
-	}
-
-
-	/* start read sequence */
-	PRINTD(("i2c_read: start read sequence\n"));
-	msg.condition = I2C_COND_START;
-	msg.acknack   = I2C_ACKNAK_WAITACK;
-	msg.direction = I2C_WRITE;
-	msg.data      = (chip << 1);
-	msg.data     |= 0x01;
-	if ((ret=i2c_transfer(&msg))) return -1;
-
-	/* read bytes; send NACK at last byte */
-	while (len--) {
-
-		if (len==0) {
-			msg.condition = I2C_COND_STOP;
-			msg.acknack   = I2C_ACKNAK_SENDNAK;
-		} else {
-			msg.condition = I2C_COND_NORMAL;
-			msg.acknack   = I2C_ACKNAK_SENDACK;
-		}
-
-		msg.direction = I2C_READ;
-		msg.data      = 0x00;
-		if ((ret=i2c_transfer(&msg))) return -1;
-
-		*buffer = msg.data;
-		PRINTD(("i2c_read: reading byte (0x%08x)=0x%02x\n",(unsigned int)buffer,*buffer));
-		buffer++;
-
-	}
-
-	i2c_reset();
-
-	return 0;
-}
-
-
-/**
- * i2c_write: -  Write multiple bytes to an i2c device
- *
- * The higher level routines take into account that this function is only
- * called with len < page length of the device (see configuration file)
- *
- * @chip:	address of the chip which is to be written
- * @addr:	i2c data address within the chip
- * @alen:	length of the i2c data address (1..2 bytes)
- * @buffer:	where to find the data to be written
- * @len:	how much byte do we want to read
- * @return:	0 in case of success
- */
-
-int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len)
-{
-	struct i2c_msg msg;
-	u8 addr_bytes[3]; /* lowest...highest byte of data address */
-
-	PRINTD(("i2c_write(chip=0x%02x, addr=0x%02x, alen=0x%02x, len=0x%02x)\n",chip,addr,alen,len));
-
-	i2c_reset();
-
-	/* chip address write */
-	PRINTD(("i2c_write: chip address write\n"));
-	msg.condition = I2C_COND_START;
-	msg.acknack   = I2C_ACKNAK_WAITACK;
-	msg.direction = I2C_WRITE;
-	msg.data      = (chip << 1);
-	msg.data     &= 0xFE;
-	if (i2c_transfer(&msg)) return -1;
-
-	/*
-	 * send memory address bytes;
-	 * alen defines how much bytes we have to send.
-	 */
-	addr_bytes[0] = (u8)((addr >>  0) & 0x000000FF);
-	addr_bytes[1] = (u8)((addr >>  8) & 0x000000FF);
-	addr_bytes[2] = (u8)((addr >> 16) & 0x000000FF);
-
-	while (--alen >= 0) {
-
-		PRINTD(("i2c_write: send memory word address\n"));
-		msg.condition = I2C_COND_NORMAL;
-		msg.acknack   = I2C_ACKNAK_WAITACK;
-		msg.direction = I2C_WRITE;
-		msg.data      = addr_bytes[alen];
-		if (i2c_transfer(&msg)) return -1;
-	}
-
-	/* write bytes; send NACK at last byte */
-	while (len--) {
-
-		PRINTD(("i2c_write: writing byte (0x%08x)=0x%02x\n",(unsigned int)buffer,*buffer));
-
-		if (len==0)
-			msg.condition = I2C_COND_STOP;
-		else
-			msg.condition = I2C_COND_NORMAL;
-
-		msg.acknack   = I2C_ACKNAK_WAITACK;
-		msg.direction = I2C_WRITE;
-		msg.data      = *(buffer++);
-
-		if (i2c_transfer(&msg)) return -1;
-
-	}
-
-	i2c_reset();
-
-	return 0;
-
-}
-
-#endif	/* CONFIG_HARD_I2C */