i2c: Move PPC4xx I2C driver into drivers/i2c directory

This patch moves the PPC4xx specific I2C device driver into the I2C
drivers directory. All 4xx config headers are updated to include this
driver.

Signed-off-by: Stefan Roese <sr@denx.de>

1 files changed, 0 insertions, 439 deletions

diff --git a/cpu/ppc4xx/i2c.c b/cpu/ppc4xx/i2c.c
deleted file mode 100644
index 9b86187a79..0000000000
--- a/cpu/ppc4xx/i2c.c
+++ /dev/null
@@ -1,439 +0,0 @@
-/*
- * (C) Copyright 2007-2009
- * Stefan Roese, DENX Software Engineering, sr@denx.de.
- *
- * based on work by Anne Sophie Harnois <anne-sophie.harnois@nextream.fr>
- *
- * (C) Copyright 2001
- * Bill Hunter,  Wave 7 Optics, williamhunter@mediaone.net
- *
- * 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
- */
-
-#include <common.h>
-#include <ppc4xx.h>
-#include <4xx_i2c.h>
-#include <i2c.h>
-#include <asm-ppc/io.h>
-
-#ifdef CONFIG_HARD_I2C
-
-DECLARE_GLOBAL_DATA_PTR;
-
-#if defined(CONFIG_I2C_MULTI_BUS)
-/*
- * Initialize the bus pointer to whatever one the SPD EEPROM is on.
- * Default is bus 0.  This is necessary because the DDR initialization
- * runs from ROM, and we can't switch buses because we can't modify
- * the global variables.
- */
-#ifndef CONFIG_SYS_SPD_BUS_NUM
-#define CONFIG_SYS_SPD_BUS_NUM	0
-#endif
-static unsigned int i2c_bus_num __attribute__ ((section (".data"))) =
-	CONFIG_SYS_SPD_BUS_NUM;
-#endif /* CONFIG_I2C_MULTI_BUS */
-
-static void _i2c_bus_reset(void)
-{
-	struct ppc4xx_i2c *i2c = (struct ppc4xx_i2c *)I2C_BASE_ADDR;
-	int i;
-	u8 dc;
-
-	/* Reset status register */
-	/* write 1 in SCMP and IRQA to clear these fields */
-	out_8(&i2c->sts, 0x0A);
-
-	/* write 1 in IRQP IRQD LA ICT XFRA to clear these fields */
-	out_8(&i2c->extsts, 0x8F);
-
-	/* Place chip in the reset state */
-	out_8(&i2c->xtcntlss, IIC_XTCNTLSS_SRST);
-
-	/* Check if bus is free */
-	dc = in_8(&i2c->directcntl);
-	if (!DIRCTNL_FREE(dc)){
-		/* Try to set bus free state */
-		out_8(&i2c->directcntl, IIC_DIRCNTL_SDAC | IIC_DIRCNTL_SCC);
-
-		/* Wait until we regain bus control */
-		for (i = 0; i < 100; ++i) {
-			dc = in_8(&i2c->directcntl);
-			if (DIRCTNL_FREE(dc))
-				break;
-
-			/* Toggle SCL line */
-			dc ^= IIC_DIRCNTL_SCC;
-			out_8(&i2c->directcntl, dc);
-			udelay(10);
-			dc ^= IIC_DIRCNTL_SCC;
-			out_8(&i2c->directcntl, dc);
-		}
-	}
-
-	/* Remove reset */
-	out_8(&i2c->xtcntlss, 0);
-}
-
-void i2c_init(int speed, int slaveaddr)
-{
-	struct ppc4xx_i2c *i2c;
-	int val, divisor;
-	int bus;
-
-#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
-
-	for (bus = 0; bus < CONFIG_SYS_MAX_I2C_BUS; bus++) {
-		I2C_SET_BUS(bus);
-
-		/* Set i2c pointer after calling I2C_SET_BUS() */
-		i2c = (struct ppc4xx_i2c *)I2C_BASE_ADDR;
-
-		/* Handle possible failed I2C state */
-		/* FIXME: put this into i2c_init_board()? */
-		_i2c_bus_reset();
-
-		/* clear lo master address */
-		out_8(&i2c->lmadr, 0);
-
-		/* clear hi master address */
-		out_8(&i2c->hmadr, 0);
-
-		/* clear lo slave address */
-		out_8(&i2c->lsadr, 0);
-
-		/* clear hi slave address */
-		out_8(&i2c->hsadr, 0);
-
-		/* Clock divide Register */
-		/* set divisor according to freq_opb */
-		divisor = (get_OPB_freq() - 1) / 10000000;
-		if (divisor == 0)
-			divisor = 1;
-		out_8(&i2c->clkdiv, divisor);
-
-		/* no interrupts */
-		out_8(&i2c->intrmsk, 0);
-
-		/* clear transfer count */
-		out_8(&i2c->xfrcnt, 0);
-
-		/* clear extended control & stat */
-		/* write 1 in SRC SRS SWC SWS to clear these fields */
-		out_8(&i2c->xtcntlss, 0xF0);
-
-		/* Mode Control Register
-		   Flush Slave/Master data buffer */
-		out_8(&i2c->mdcntl, IIC_MDCNTL_FSDB | IIC_MDCNTL_FMDB);
-
-		val = in_8(&i2c->mdcntl);
-
-		/* Ignore General Call, slave transfers are ignored,
-		 * disable interrupts, exit unknown bus state, enable hold
-		 * SCL 100kHz normaly or FastMode for 400kHz and above
-		 */
-
-		val |= IIC_MDCNTL_EUBS | IIC_MDCNTL_HSCL;
-		if (speed >= 400000)
-			val |= IIC_MDCNTL_FSM;
-		out_8(&i2c->mdcntl, val);
-
-		/* clear control reg */
-		out_8(&i2c->cntl, 0x00);
-	}
-
-	/* set to SPD bus as default bus upon powerup */
-	I2C_SET_BUS(CONFIG_SYS_SPD_BUS_NUM);
-}
-
-/*
- * This code tries to use the features of the 405GP i2c
- * controller. It will transfer up to 4 bytes in one pass
- * on the loop. It only does out_8((u8 *)lbz) to the buffer when it
- * is possible to do out16(lhz) transfers.
- *
- * cmd_type is 0 for write 1 for read.
- *
- * addr_len can take any value from 0-255, it is only limited
- * by the char, we could make it larger if needed. If it is
- * 0 we skip the address write cycle.
- *
- * Typical case is a Write of an addr followd by a Read. The
- * IBM FAQ does not cover this. On the last byte of the write
- * we don't set the creg CHT bit, and on the first bytes of the
- * read we set the RPST bit.
- *
- * It does not support address only transfers, there must be
- * a data part. If you want to write the address yourself, put
- * it in the data pointer.
- *
- * It does not support transfer to/from address 0.
- *
- * It does not check XFRCNT.
- */
-static int i2c_transfer(unsigned char cmd_type,
-			unsigned char chip,
-			unsigned char addr[],
-			unsigned char addr_len,
-			unsigned char data[],
-			unsigned short data_len)
-{
-	struct ppc4xx_i2c *i2c = (struct ppc4xx_i2c *)I2C_BASE_ADDR;
-	u8 *ptr;
-	int reading;
-	int tran, cnt;
-	int result;
-	int status;
-	int i;
-	u8 creg;
-
-	if (data == 0 || data_len == 0) {
-		/* Don't support data transfer of no length or to address 0 */
-		printf( "i2c_transfer: bad call\n" );
-		return IIC_NOK;
-	}
-	if (addr && addr_len) {
-		ptr = addr;
-		cnt = addr_len;
-		reading = 0;
-	} else {
-		ptr = data;
-		cnt = data_len;
-		reading = cmd_type;
-	}
-
-	/* Clear Stop Complete Bit */
-	out_8(&i2c->sts, IIC_STS_SCMP);
-
-	/* Check init */
-	i = 10;
-	do {
-		/* Get status */
-		status = in_8(&i2c->sts);
-		i--;
-	} while ((status & IIC_STS_PT) && (i > 0));
-
-	if (status & IIC_STS_PT) {
-		result = IIC_NOK_TOUT;
-		return(result);
-	}
-
-	/* flush the Master/Slave Databuffers */
-	out_8(&i2c->mdcntl, in_8(&i2c->mdcntl) |
-	      IIC_MDCNTL_FMDB | IIC_MDCNTL_FSDB);
-
-	/* need to wait 4 OPB clocks? code below should take that long */
-
-	/* 7-bit adressing */
-	out_8(&i2c->hmadr, 0);
-	out_8(&i2c->lmadr, chip);
-
-	tran = 0;
-	result = IIC_OK;
-	creg = 0;
-
-	while (tran != cnt && (result == IIC_OK)) {
-		int  bc,j;
-
-		/*
-		 * Control register =
-		 * Normal transfer, 7-bits adressing, Transfer up to
-		 * bc bytes, Normal start, Transfer is a sequence of transfers
-		 */
-		creg |= IIC_CNTL_PT;
-
-		bc = (cnt - tran) > 4 ? 4 : cnt - tran;
-		creg |= (bc - 1) << 4;
-		/* if the real cmd type is write continue trans */
-		if ((!cmd_type && (ptr == addr)) || ((tran + bc) != cnt))
-			creg |= IIC_CNTL_CHT;
-
-		if (reading) {
-			creg |= IIC_CNTL_READ;
-		} else {
-			for(j = 0; j < bc; j++) {
-				/* Set buffer */
-				out_8(&i2c->mdbuf, ptr[tran + j]);
-			}
-		}
-		out_8(&i2c->cntl, creg);
-
-		/*
-		 * Transfer is in progress
-		 * we have to wait for upto 5 bytes of data
-		 * 1 byte chip address+r/w bit then bc bytes
-		 * of data.
-		 * udelay(10) is 1 bit time at 100khz
-		 * Doubled for slop. 20 is too small.
-		 */
-		i = 2 * 5 * 8;
-		do {
-			/* Get status */
-			status = in_8(&i2c->sts);
-			udelay(10);
-			i--;
-		} while ((status & IIC_STS_PT) && !(status & IIC_STS_ERR) &&
-			 (i > 0));
-
-		if (status & IIC_STS_ERR) {
-			result = IIC_NOK;
-			status = in_8(&i2c->extsts);
-			/* Lost arbitration? */
-			if (status & IIC_EXTSTS_LA)
-				result = IIC_NOK_LA;
-			/* Incomplete transfer? */
-			if (status & IIC_EXTSTS_ICT)
-				result = IIC_NOK_ICT;
-			/* Transfer aborted? */
-			if (status & IIC_EXTSTS_XFRA)
-				result = IIC_NOK_XFRA;
-		} else if ( status & IIC_STS_PT) {
-			result = IIC_NOK_TOUT;
-		}
-
-		/* Command is reading => get buffer */
-		if ((reading) && (result == IIC_OK)) {
-			/* Are there data in buffer */
-			if (status & IIC_STS_MDBS) {
-				/*
-				 * even if we have data we have to wait 4OPB
-				 * clocks for it to hit the front of the FIFO,
-				 * after that we can just read. We should check
-				 * XFCNT here and if the FIFO is full there is
-				 * no need to wait.
-				 */
-				udelay(1);
-				for (j = 0; j < bc; j++)
-					ptr[tran + j] = in_8(&i2c->mdbuf);
-			} else
-				result = IIC_NOK_DATA;
-		}
-		creg = 0;
-		tran += bc;
-		if (ptr == addr && tran == cnt) {
-			ptr = data;
-			cnt = data_len;
-			tran = 0;
-			reading = cmd_type;
-			if (reading)
-				creg = IIC_CNTL_RPST;
-		}
-	}
-	return result;
-}
-
-int i2c_probe(uchar chip)
-{
-	uchar buf[1];
-
-	buf[0] = 0;
-
-	/*
-	 * What is needed is to send the chip address and verify that the
-	 * address was <ACK>ed (i.e. there was a chip at that address which
-	 * drove the data line low).
-	 */
-	return (i2c_transfer(1, chip << 1, 0, 0, buf, 1) != 0);
-}
-
-static int ppc4xx_i2c_transfer(uchar chip, uint addr, int alen, uchar *buffer,
-			       int len, int read)
-{
-	uchar xaddr[4];
-	int ret;
-
-	if (alen > 4) {
-		printf("I2C: addr len %d not supported\n", alen);
-		return 1;
-	}
-
-	if (alen > 0) {
-		xaddr[0] = (addr >> 24) & 0xFF;
-		xaddr[1] = (addr >> 16) & 0xFF;
-		xaddr[2] = (addr >> 8) & 0xFF;
-		xaddr[3] = addr & 0xFF;
-	}
-
-
-#ifdef CONFIG_SYS_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.
-	 */
-	if (alen > 0)
-		chip |= ((addr >> (alen * 8)) &
-			 CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW);
-#endif
-	if ((ret = i2c_transfer(read, chip << 1, &xaddr[4 - alen], alen,
-				buffer, len)) != 0) {
-		if (gd->have_console) {
-			printf("I2C %s: failed %d\n",
-			       read ? "read" : "write", ret);
-		}
-
-		return 1;
-	}
-
-	return 0;
-}
-
-int i2c_read(uchar chip, uint addr, int alen, uchar * buffer, int len)
-{
-	return ppc4xx_i2c_transfer(chip, addr, alen, buffer, len, 1);
-}
-
-int i2c_write(uchar chip, uint addr, int alen, uchar * buffer, int len)
-{
-	return ppc4xx_i2c_transfer(chip, addr, alen, buffer, len, 0);
-}
-
-#if defined(CONFIG_I2C_MULTI_BUS)
-/*
- * Functions for multiple I2C bus handling
- */
-unsigned int i2c_get_bus_num(void)
-{
-	return i2c_bus_num;
-}
-
-int i2c_set_bus_num(unsigned int bus)
-{
-	if (bus >= CONFIG_SYS_MAX_I2C_BUS)
-		return -1;
-
-	i2c_bus_num = bus;
-
-	return 0;
-}
-#endif	/* CONFIG_I2C_MULTI_BUS */
-#endif	/* CONFIG_HARD_I2C */