* update kernel to .37 * add support for falcon (big thank you goes to lantiq !!)

SVN-Revision: 26021

1 files changed, 827 insertions, 0 deletions

diff --git a/target/linux/lantiq/patches/910-falcon-i2c.patch b/target/linux/lantiq/patches/910-falcon-i2c.patch
new file mode 100644
index 0000000000..c83486dd20
--- /dev/null
+++ b/target/linux/lantiq/patches/910-falcon-i2c.patch
@@ -0,0 +1,827 @@
+--- a/drivers/i2c/busses/Makefile
++++ b/drivers/i2c/busses/Makefile
+@@ -76,5 +76,6 @@
+ obj-$(CONFIG_I2C_STUB)		+= i2c-stub.o
+ obj-$(CONFIG_SCx200_ACB)	+= scx200_acb.o
+ obj-$(CONFIG_SCx200_I2C)	+= scx200_i2c.o
++obj-$(CONFIG_I2C_FALCON)	+= i2c-falcon.o
+ 
+ ccflags-$(CONFIG_I2C_DEBUG_BUS) := -DDEBUG
+--- a/drivers/i2c/busses/Kconfig
++++ b/drivers/i2c/busses/Kconfig
+@@ -281,6 +281,10 @@
+ 
+ comment "I2C system bus drivers (mostly embedded / system-on-chip)"
+ 
++config I2C_FALCON
++	tristate "Falcon I2C interface"
++#	depends on SOC_FALCON
++
+ config I2C_AT91
+ 	tristate "Atmel AT91 I2C Two-Wire interface (TWI)"
+ 	depends on ARCH_AT91 && EXPERIMENTAL && BROKEN
+--- /dev/null
++++ b/drivers/i2c/busses/i2c-falcon.c
+@@ -0,0 +1,802 @@
++/*
++ *   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.
++ */
++
++/* #define DEBUG */
++
++#include <linux/module.h>
++#include <linux/ioport.h>
++#include <linux/init.h>
++#include <linux/platform_device.h>
++#include <linux/i2c.h>
++#include <linux/interrupt.h>
++#include <linux/spinlock.h>
++#include <linux/io.h>
++#include <linux/clk.h>
++#include <linux/err.h>
++
++/* CURRENT ISSUES:
++ * - no high speed support
++ * - rx issue with "address mode" & "tx end" interrupts
++ * - ten bit mode is not tested
++ */
++
++/* mapping for access macros */
++#define reg_r32(reg)		__raw_readl(reg)
++#define reg_w32(val, reg)	__raw_writel(val, reg)
++#define reg_w32_mask(clear, set, reg)	\
++				reg_w32((reg_r32(reg) & ~(clear)) | (set), reg)
++#define reg_r32_table(reg, idx) reg_r32(&((uint32_t *)&reg)[idx])
++#define reg_w32_table(val, reg, idx) reg_w32(val, &((uint32_t *)&reg)[idx])
++#define i2c	(priv->membase)
++#include <falcon/i2c_reg.h>
++
++/* enable hacks to overcome current issue */
++#define FALCON_FIX_ME
++
++#define FALCON_I2C_ADDR			0x00
++#define FALCON_I2C_READY_TIMEOUT	1000
++#define FALCON_I2C_WAIT_TIMEOUT		10
++
++#define DRV_NAME "i2c-falcon"
++
++#if defined(DEBUG)
++#define static /* no static functions for better debugging */
++#endif
++
++#define FALCON_I2C_ARB_LOST	(1 << 0)
++#define FALCON_I2C_NACK		(1 << 1)
++#define FALCON_I2C_RX_UFL	(1 << 2)
++#define FALCON_I2C_RX_OFL	(1 << 3)
++#define FALCON_I2C_TX_UFL	(1 << 4)
++#define FALCON_I2C_TX_OFL	(1 << 5)
++#define FALCON_I2C_BURST_REQ	(1 << 6)
++#define FALCON_I2C_RX		(1 << 7)
++#define FALCON_I2C_TX_END	(1 << 8)
++#define FALCON_I2C_ADDR_MATCH	(1 << 9) /* doesn't trigger */
++
++struct falcon_i2c {
++	spinlock_t lock;
++
++	enum {
++		FALCON_I2C_MODE_100	= 1,
++		FALCON_I2C_MODE_400	= 2,
++		FALCON_I2C_MODE_3400	= 3
++	} mode;				/* current speed mode */
++
++	int ten_bit;			/* current address mode */
++	unsigned long status;		/* bus events holder */
++	struct clk *clk;		/* clock input for i2c hardware block */
++	struct gpon_reg_i2c __iomem *membase;	/* base of mapped registers */
++	int irq_lb, irq_b, irq_err, irq_p;	/* last burst, burst, error,
++						   protocol IRQs */
++	struct completion done;
++	struct i2c_adapter adap;
++	struct device *dev;
++};
++
++#define FALCON_I2C_ERROR_MASK		(FALCON_I2C_NACK \
++					| FALCON_I2C_ARB_LOST \
++					| FALCON_I2C_RX_OFL \
++					| FALCON_I2C_RX_UFL \
++					| FALCON_I2C_TX_OFL \
++					| FALCON_I2C_TX_UFL)
++
++#define FALCON_I2C_ERROR(priv)		(priv->status & FALCON_I2C_ERROR_MASK)
++#define FALCON_I2C_ERROR_CLEAR(priv)	do { \
++						priv->status &= \
++						~FALCON_I2C_ERROR_MASK; \
++					} while (0)
++
++static void falcon_addr_configure(struct falcon_i2c *priv, int ten_bit)
++{
++	u32 ten_bit_mask = ten_bit ? I2C_ADDR_CFG_TBAM_10bit : 0;
++
++	/* configure address */
++	i2c_w32(I2C_ADDR_CFG_SOPE_EN /* generate stop when no more data in the
++					fifo */
++		| I2C_ADDR_CFG_SONA_EN /* generate stop when NA received */
++		| I2C_ADDR_CFG_MnS_EN /* we are master device */
++		| ten_bit_mask
++		| FALCON_I2C_ADDR, /* our address */
++		addr_cfg);
++}
++
++static irqreturn_t falcon_i2c_isr(int irq, void *dev_id)
++{
++	u32 i_raw, i_pro, i_err;
++	struct falcon_i2c *priv = dev_id;
++	unsigned long flags;
++	unsigned int old_status;
++
++	spin_lock_irqsave(&priv->lock, flags);
++
++	old_status = (unsigned int)priv->status;
++
++	i_raw = i2c_r32(mis);
++
++	/* protocol interrupt */
++	if (i_raw & I2C_RIS_I2C_P_INT_INTOCC) {
++		i_pro = i2c_r32(p_irqss);
++
++		/* tx -> rx switch */
++		if (i_pro & I2C_P_IRQSS_RX)
++			priv->status |= FALCON_I2C_RX;
++
++		/* tx end */
++		if (i_pro & I2C_P_IRQSS_TX_END)
++			priv->status |= FALCON_I2C_TX_END;
++
++		/* not acknowledge */
++		if (i_pro & I2C_P_IRQSS_NACK)
++			priv->status |= FALCON_I2C_NACK;
++
++		/* arbitration lost */
++		if (i_pro & I2C_P_IRQSS_AL)
++			priv->status |= FALCON_I2C_ARB_LOST;
++
++		/* address match */
++		if (i_pro & I2C_P_IRQSS_AM)
++			priv->status |= FALCON_I2C_ADDR_MATCH;
++
++		i2c_w32(i_pro, p_irqsc);
++	}
++
++	/* error interrupt */
++	if (i_raw & I2C_RIS_I2C_ERR_INT_INTOCC) {
++		i_err = i2c_r32(err_irqss);
++
++		/* tx fifo overflow */
++		if (i_err & I2C_ERR_IRQSS_TXF_OFL)
++			priv->status |= FALCON_I2C_TX_OFL;
++
++		/* tx fifo underflow */
++		if (i_err & I2C_ERR_IRQSS_TXF_UFL)
++			priv->status |= FALCON_I2C_TX_UFL;
++
++		/* rx fifo overflow */
++		if (i_err & I2C_ERR_IRQSS_RXF_OFL)
++			priv->status |= FALCON_I2C_RX_OFL;
++
++		/* rx fifo underflow */
++		if (i_err & I2C_ERR_IRQSS_RXF_UFL)
++			priv->status |= FALCON_I2C_RX_UFL;
++
++		i2c_w32(i_err, err_irqsc);
++	}
++
++	/* burst request */
++	if (i_raw & I2C_RIS_BREQ_INT_INTOCC) {
++		i2c_w32_mask(I2C_IMSC_BREQ_INT_EN, 0, imsc);
++		i2c_w32_mask(0, I2C_ICR_BREQ_INT_CLR, icr);
++
++		priv->status |= FALCON_I2C_BURST_REQ;
++	}
++
++	/* last burst request */
++	if (i_raw & I2C_RIS_LBREQ_INT_INTOCC) {
++		i2c_w32_mask(I2C_IMSC_LBREQ_INT_EN, 0, imsc);
++		i2c_w32_mask(0, I2C_ICR_LBREQ_INT_CLR, icr);
++
++		priv->status |= FALCON_I2C_BURST_REQ;
++	}
++
++	if (old_status != (unsigned int)priv->status)
++		complete(&priv->done);
++
++	spin_unlock_irqrestore(&priv->lock, flags);
++
++	return IRQ_HANDLED;
++}
++
++static int falcon_i2c_ready(struct falcon_i2c *priv)
++{
++	int timeout;
++	u32 bus_stat;
++	unsigned long flags;
++	int ret;
++
++	for (timeout = 0; timeout < FALCON_I2C_READY_TIMEOUT; timeout++) {
++		bus_stat = i2c_r32(bus_stat);
++
++		if (bus_stat & I2C_BUS_STAT_BS_SC) {
++			cpu_relax();
++		} else {
++			spin_lock_irqsave(&priv->lock, flags);
++
++			if (FALCON_I2C_ERROR(priv)) {
++				ret = priv->status;
++
++				dev_dbg(priv->dev, "bus ready wait error 0x%08lx\n", priv->status);
++
++				FALCON_I2C_ERROR_CLEAR(priv);
++			} else {
++				ret = 0;
++			}
++
++			spin_unlock_irqrestore(&priv->lock, flags);
++
++			return ret;
++		}
++	}
++
++	dev_dbg(priv->dev, "bus ready wait timeout\n");
++
++	return -ETIME;
++}
++
++static int falcon_i2c_wait(struct falcon_i2c *priv, unsigned long status)
++{
++	int ret = 0;
++	unsigned long flags;
++	unsigned int timeout;
++
++	spin_lock_irqsave(&priv->lock, flags);
++
++	priv->status &= FALCON_I2C_BURST_REQ;
++
++	/* check if the event already occurred */
++	if ((priv->status & status) == status) {
++		priv->status &= ~status;
++		spin_unlock_irqrestore(&priv->lock, flags);
++
++		return 0;
++	}
++
++	spin_unlock_irqrestore(&priv->lock, flags);
++
++	/* unmask burst interrupts */
++	i2c_w32_mask(0, I2C_IMSC_LBREQ_INT_EN | I2C_IMSC_BREQ_INT_EN, imsc);
++
++	for (timeout = 0; timeout < FALCON_I2C_WAIT_TIMEOUT; timeout++) {
++		/* wait for the data request */
++		wait_for_completion_timeout(&priv->done, HZ / 10);
++
++		/* handle errors */
++		spin_lock_irqsave(&priv->lock, flags);
++
++		if (FALCON_I2C_ERROR(priv)) {
++			dev_dbg(priv->dev, "wait error 0x%08lx (waiting for 0x%08lx)\n",
++			    priv->status,
++			    status);
++
++			if (priv->status & FALCON_I2C_NACK)
++				ret = -ENXIO;
++			else
++				ret = -EREMOTEIO;
++
++			FALCON_I2C_ERROR_CLEAR(priv);
++		} else {
++			if ((priv->status & status) == status) {
++				priv->status &= ~status;
++				spin_unlock_irqrestore(&priv->lock, flags);
++
++				return 0;
++			}
++		}
++
++		spin_unlock_irqrestore(&priv->lock, flags);
++
++		if (ret)
++			return ret;
++	}
++
++	dev_dbg(priv->dev, "wait timeout error 0x%08lx (waiting for 0x%08lx)\n",
++	    priv->status,
++	    status);
++
++	return -ETIME;
++}
++
++static int falcon_i2c_tx(struct falcon_i2c *priv, int ten_bit, u16 addr,
++			 u8 *buf, int len)
++{
++	int i;
++	int ret;
++
++	dev_dbg(priv->dev, "%s\n", __func__);
++
++	/* tell fifo the number of bytes we are going to send */
++	i2c_w32(len + (ten_bit ? 2 : 1), tps_ctrl);
++
++	/* wait for the data request */
++	ret = falcon_i2c_wait(priv, FALCON_I2C_BURST_REQ);
++	if (ret)
++		return ret;
++
++	/* send slave address */
++	if (ten_bit) {
++		i2c_w32(0x78 | ((addr >> 7) & 0x7), txd);
++		i2c_w32(0x78 | ((addr & 0x7f) << 1) | 0, txd);
++	} else {
++		i2c_w32((addr << 1) | 0, txd);
++	}
++
++	/* fill fifo */
++	for (i = 0; i < len; i++) {
++		ret = falcon_i2c_wait(priv, FALCON_I2C_BURST_REQ);
++		if (ret)
++			return ret;
++
++		i2c_w32(buf[i], txd);
++	}
++
++	return falcon_i2c_wait(priv, FALCON_I2C_TX_END);
++}
++
++static int falcon_i2c_rx(struct falcon_i2c *priv, int ten_bit, u16 addr,
++			 u8 *buf, int len)
++{
++	int i;
++	int ret;
++
++	dev_dbg(priv->dev, "%s\n", __func__);
++
++	/* we need to transmit address only */
++	i2c_w32(ten_bit ? 2 : 1, tps_ctrl);
++
++	/* set maximum received packet size */
++	i2c_w32(len, mrps_ctrl);
++
++	/* wait for the data request */
++	ret = falcon_i2c_wait(priv, FALCON_I2C_BURST_REQ);
++	if (ret)
++		return ret;
++
++	/* write down the address */
++	if (ten_bit) {
++		i2c_w32(0x78 | ((addr >> 7) & 0x7), txd);
++		i2c_w32(0x78 | ((addr & 0x7f) << 1) | 1, txd);
++	} else {
++		i2c_w32((addr << 1) | 1, txd);
++	}
++
++	/* wait for the read request */
++	ret = falcon_i2c_wait(priv, FALCON_I2C_TX_END
++#ifndef FALCON_FIX_ME
++			      | FALCON_I2C_ADDR_MATCH
++#endif
++			      | FALCON_I2C_RX);
++
++	if (ret)
++		return ret;
++
++	/* read bytes */
++	for (i = 0; i < len; i++) {
++#ifdef FALCON_FIX_ME
++		while (i2c_r32(rps_stat) == 0)
++			cpu_relax();
++#else
++		ret = falcon_i2c_wait(priv, FALCON_I2C_BURST_REQ);
++
++		if (ret)
++			return ret;
++#endif
++
++		buf[i] = i2c_r32(rxd);
++	}
++
++#ifndef FALCON_FIX_ME
++	/* wait for transmission end */
++	return falcon_i2c_wait(priv, FALCON_I2C_TX_END);
++#else
++	return 0;
++#endif
++}
++
++static int falcon_i2c_xfer_msg(struct falcon_i2c *priv, struct i2c_msg *msg)
++{
++	int ret;
++	int ten_bit;
++	unsigned long flags;
++
++	dev_dbg(priv->dev, "%s %u byte(s) %s 0x%02x\n",
++		(msg->flags & I2C_M_RD) ? "read" : "write", msg->len,
++		(msg->flags & I2C_M_RD) ? "from" : "to", msg->addr);
++
++	if (msg->flags & I2C_M_TEN)
++		ten_bit = 1;
++	else
++		ten_bit = 0;
++
++	/* reconfigure bus if need to send message in different address mode */
++	spin_lock_irqsave(&priv->lock, flags);
++	if (ten_bit != priv->ten_bit) {
++
++		/* disable bus */
++		i2c_w32_mask(I2C_RUN_CTRL_RUN_EN, 0, run_ctrl);
++
++		/* reconfigure address */
++		falcon_addr_configure(priv, ten_bit);
++
++		/* enable bus */
++		i2c_w32_mask(0, I2C_RUN_CTRL_RUN_EN, run_ctrl);
++
++		priv->ten_bit = ten_bit;
++	}
++	spin_unlock_irqrestore(&priv->lock, flags);
++
++	/* read/write actual message */
++	if (msg->flags & I2C_M_RD)
++		ret = falcon_i2c_rx(priv, ten_bit, msg->addr, msg->buf,
++				    msg->len);
++	else
++		ret = falcon_i2c_tx(priv, ten_bit, msg->addr, msg->buf,
++				    msg->len);
++
++	if (ret)
++		return ret;
++
++	return 0;
++}
++
++static int falcon_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msg,
++			   int num)
++{
++	int i;
++	int ret;
++	unsigned long flags;
++	struct falcon_i2c *priv = i2c_get_adapdata(adap);
++
++	dev_dbg(priv->dev, "xfer %u messages\n", num);
++
++	/* transfer each message */
++	for (i = 0; i < num; i++) {
++#ifdef FALCON_FIX_ME
++		/* disable bus */
++		i2c_w32_mask(I2C_RUN_CTRL_RUN_EN, 0, run_ctrl);
++		/* enable bus */
++		i2c_w32_mask(0, I2C_RUN_CTRL_RUN_EN, run_ctrl);
++#endif
++
++		/* clear bus status */
++		spin_lock_irqsave(&priv->lock, flags);
++		priv->status = 0;
++		spin_unlock_irqrestore(&priv->lock, flags);
++
++		/* wait for the bus to become ready */
++		ret = falcon_i2c_ready(priv);
++		if (ret)
++			return ret;
++
++		/* transfer message */
++		ret = falcon_i2c_xfer_msg(priv, &msg[i]);
++
++		if (ret)
++			return ret;
++
++		/* check for unhandled errors */
++		spin_lock_irqsave(&priv->lock, flags);
++		if (FALCON_I2C_ERROR(priv))
++			ret = priv->status;
++		spin_unlock_irqrestore(&priv->lock, flags);
++
++		if (ret) {
++			dev_warn(priv->dev, "message %u unhandled error 0x%x\n",
++				i, ret);
++
++			return ret;
++		}
++	}
++
++	return 0;
++}
++
++static u32 falcon_i2c_func(struct i2c_adapter *adap)
++{
++	return I2C_FUNC_I2C | I2C_FUNC_10BIT_ADDR | I2C_FUNC_SMBUS_EMUL;
++}
++
++static struct i2c_algorithm falcon_i2c_algorithm = {
++	.master_xfer	= falcon_i2c_xfer,
++	.functionality	= falcon_i2c_func,
++};
++
++static int falcon_i2c_hw_init(struct i2c_adapter *adap)
++{
++	struct falcon_i2c *priv = i2c_get_adapdata(adap);
++
++	/* disable bus */
++	i2c_w32_mask(I2C_RUN_CTRL_RUN_EN, 0, run_ctrl);
++
++	/* set normal operation clock divider */
++	i2c_w32(1 << I2C_CLC_RMC_OFFSET, clc);
++
++	/* set frequency */
++	if (priv->mode == FALCON_I2C_MODE_100) {
++		dev_dbg(priv->dev, "set standard mode (100 kHz)\n");
++
++		i2c_w32(0, fdiv_high_cfg);
++
++		i2c_w32((1 << I2C_FDIV_CFG_INC_OFFSET)
++			| (499 << I2C_FDIV_CFG_DEC_OFFSET),
++			fdiv_cfg);
++	} else if (priv->mode == FALCON_I2C_MODE_400) {
++		dev_dbg(priv->dev, "set fast mode (400 kHz)\n");
++
++		i2c_w32(0, fdiv_high_cfg);
++
++		i2c_w32((1 << I2C_FDIV_CFG_INC_OFFSET)
++			| (124 << I2C_FDIV_CFG_DEC_OFFSET),
++			fdiv_cfg);
++	} else if (priv->mode == FALCON_I2C_MODE_3400) {
++		dev_dbg(priv->dev, "set high mode (3.4 MHz)\n");
++
++		i2c_w32(0, fdiv_cfg);
++
++		/* TODO recalculate value for 100MHz input */
++		i2c_w32((41 << I2C_FDIV_CFG_INC_OFFSET)
++			| (152 << I2C_FDIV_CFG_DEC_OFFSET),
++			fdiv_high_cfg);
++	} else {
++		dev_warn(priv->dev, "unknown mode\n");
++
++		return -ENODEV;
++	}
++
++	/* configure fifo */
++	i2c_w32(I2C_FIFO_CFG_TXFC /* tx fifo as flow controller */
++		| I2C_FIFO_CFG_RXFC /* rx fifo as flow controller */
++		| I2C_FIFO_CFG_TXFA_TXFA2 /* tx fifo 4-byte aligned */
++		| I2C_FIFO_CFG_RXFA_RXFA2 /* rx fifo 4-byte aligned */
++		| I2C_FIFO_CFG_TXBS_TXBS0 /* tx fifo burst size is 1 word */
++		| I2C_FIFO_CFG_RXBS_RXBS0, /* rx fifo burst size is 1 word */
++		fifo_cfg);
++
++	/* configure address */
++	falcon_addr_configure(priv, priv->ten_bit);
++
++	/* enable bus */
++	i2c_w32_mask(0, I2C_RUN_CTRL_RUN_EN, run_ctrl);
++
++	/* mask burst interrupts */
++	i2c_w32_mask(I2C_IMSC_LBREQ_INT_EN | I2C_IMSC_BREQ_INT_EN, 0, imsc);
++
++	/* enable interrupts */
++	i2c_w32(I2C_IMSC_LBREQ_INT_EN
++		| I2C_IMSC_BREQ_INT_EN
++		| I2C_IMSC_I2C_P_INT_EN
++		| I2C_IMSC_I2C_ERR_INT_EN,
++		imsc);
++
++	return 0;
++}
++
++static int __devinit falcon_i2c_probe(struct platform_device *pdev)
++{
++	int ret = 0;
++	struct falcon_i2c *priv;
++	struct i2c_adapter *adap;
++	struct resource *mmres, *ioarea,
++			*irqres_lb, *irqres_b, *irqres_err, *irqres_p;
++	struct clk *clk;
++
++	dev_dbg(&pdev->dev, "probing\n");
++
++	mmres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++	irqres_lb = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
++						 "i2c_lb");
++	irqres_b = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "i2c_b");
++	irqres_err = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
++						  "i2c_err");
++	irqres_p = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "i2c_p");
++
++	if (!mmres || !irqres_lb || !irqres_b || !irqres_err || !irqres_p) {
++		dev_err(&pdev->dev, "no resources\n");
++		return -ENODEV;
++	}
++
++	clk = clk_get(&pdev->dev, "fpi");
++	if (IS_ERR(clk)) {
++		dev_err(&pdev->dev, "failed to get fpi clk\n");
++		return -ENOENT;
++	}
++
++	if (clk_get_rate(clk) != 100000000) {
++		dev_err(&pdev->dev, "input clock is not 100MHz\n");
++		return -ENOENT;
++	}
++
++	/* allocate private data */
++	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
++	if (!priv) {
++		dev_err(&pdev->dev, "can't allocate private data\n");
++		return -ENOMEM;
++	}
++
++	adap = &priv->adap;
++	i2c_set_adapdata(adap, priv);
++	adap->owner = THIS_MODULE;
++	adap->class = I2C_CLASS_HWMON | I2C_CLASS_SPD;
++	strlcpy(adap->name, DRV_NAME "-adapter", sizeof(adap->name));
++	adap->algo = &falcon_i2c_algorithm;
++
++	priv->ten_bit = 0;
++	priv->mode = FALCON_I2C_MODE_100;
++	priv->clk = clk;
++	priv->dev = &pdev->dev;
++
++	spin_lock_init(&priv->lock);
++
++	ioarea = request_mem_region(mmres->start, resource_size(mmres),
++					 pdev->name);
++
++	if (ioarea == NULL) {
++		dev_err(&pdev->dev, "I2C region already claimed\n");
++		ret = -ENXIO;
++		goto err_free_priv;
++	}
++
++	/* map memory */
++	priv->membase = ioremap_nocache(mmres->start & ~KSEG1,
++		resource_size(mmres));
++	if (priv->membase == NULL) {
++		ret = -ENOMEM;
++		goto err_release_region;
++	}
++
++	priv->irq_lb = irqres_lb->start;
++	ret = request_irq(priv->irq_lb, falcon_i2c_isr, IRQF_DISABLED,
++			  irqres_lb->name, priv);
++	if (ret) {
++		dev_err(&pdev->dev, "can't get last burst IRQ %d\n", irqres_lb->start);
++		ret = -ENODEV;
++		goto err_unmap_mem;
++	}
++
++	priv->irq_b = irqres_b->start;
++	ret = request_irq(priv->irq_b, falcon_i2c_isr, IRQF_DISABLED,
++			  irqres_b->name, priv);
++	if (ret) {
++		dev_err(&pdev->dev, "can't get burst IRQ %d\n", irqres_b->start);
++		ret = -ENODEV;
++		goto err_free_lb_irq;
++	}
++
++	priv->irq_err = irqres_err->start;
++	ret = request_irq(priv->irq_err, falcon_i2c_isr, IRQF_DISABLED,
++			  irqres_err->name, priv);
++	if (ret) {
++		dev_err(&pdev->dev, "can't get error IRQ %d\n", irqres_err->start);
++		ret = -ENODEV;
++		goto err_free_b_irq;
++	}
++
++	priv->irq_p = irqres_p->start;
++	ret = request_irq(priv->irq_p, falcon_i2c_isr, IRQF_DISABLED,
++			  irqres_p->name, priv);
++	if (ret) {
++		dev_err(&pdev->dev, "can't get protocol IRQ %d\n", irqres_p->start);
++		ret = -ENODEV;
++		goto err_free_err_irq;
++	}
++
++	dev_dbg(&pdev->dev, "mapped io-space to %p\n", priv->membase);
++	dev_dbg(&pdev->dev, "use IRQs %d, %d, %d, %d\n", irqres_lb->start,
++	    irqres_b->start, irqres_err->start, irqres_p->start);
++
++	/* add our adapter to the i2c stack */
++	ret = i2c_add_numbered_adapter(adap);
++	if (ret) {
++		dev_err(&pdev->dev, "can't register I2C adapter\n");
++		goto err_free_p_irq;
++	}
++
++	platform_set_drvdata(pdev, priv);
++	i2c_set_adapdata(adap, priv);
++
++	/* print module version information */
++	dev_dbg(&pdev->dev, "module id=%u revision=%u\n",
++		(i2c_r32(id) & I2C_ID_ID_MASK) >> I2C_ID_ID_OFFSET,
++		(i2c_r32(id) & I2C_ID_REV_MASK) >> I2C_ID_REV_OFFSET);
++
++	init_completion(&priv->done);
++
++	/* initialize HW */
++	ret = falcon_i2c_hw_init(adap);
++	if (ret) {
++		dev_err(&pdev->dev, "can't configure adapter\n");
++		goto err_remove_adapter;
++	}
++
++	return 0;
++
++err_remove_adapter:
++	i2c_del_adapter(adap);
++	platform_set_drvdata(pdev, NULL);
++
++err_free_p_irq:
++	free_irq(priv->irq_p, priv);
++
++err_free_err_irq:
++	free_irq(priv->irq_err, priv);
++
++err_free_b_irq:
++	free_irq(priv->irq_b, priv);
++
++err_free_lb_irq:
++	free_irq(priv->irq_lb, priv);
++
++err_unmap_mem:
++	iounmap(priv->membase);
++
++err_release_region:
++	release_mem_region(mmres->start, resource_size(mmres));
++
++err_free_priv:
++	kfree(priv);
++
++	return ret;
++}
++
++static int __devexit falcon_i2c_remove(struct platform_device *pdev)
++{
++	struct falcon_i2c *priv = platform_get_drvdata(pdev);
++	struct resource *mmres;
++
++	/* disable bus */
++	i2c_w32_mask(I2C_RUN_CTRL_RUN_EN, 0, run_ctrl);
++
++	/* remove driver */
++	platform_set_drvdata(pdev, NULL);
++	i2c_del_adapter(&priv->adap);
++
++	free_irq(priv->irq_lb, priv);
++	free_irq(priv->irq_b, priv);
++	free_irq(priv->irq_err, priv);
++	free_irq(priv->irq_p, priv);
++
++	kfree(priv);
++
++	mmres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++	release_mem_region(mmres->start, resource_size(mmres));
++
++	dev_dbg(&pdev->dev, "removed\n");
++
++	return 0;
++}
++
++static struct platform_driver falcon_i2c_driver = {
++	.probe	= falcon_i2c_probe,
++	.remove	= __devexit_p(falcon_i2c_remove),
++	.driver	= {
++		.name	= DRV_NAME,
++		.owner	= THIS_MODULE,
++	},
++};
++
++static int __init falcon_i2c_init(void)
++{
++	int ret;
++
++	ret = platform_driver_register(&falcon_i2c_driver);
++
++	if (ret)
++		printk(KERN_DEBUG DRV_NAME ": can't register platform driver");
++
++	return ret;
++}
++
++static void __exit falcon_i2c_exit(void)
++{
++	platform_driver_unregister(&falcon_i2c_driver);
++}
++
++module_init(falcon_i2c_init);
++module_exit(falcon_i2c_exit);
++
++MODULE_DESCRIPTION("Lantiq FALC(tm) ON - I2C bus adapter");
++MODULE_ALIAS("platform:i2c_falcon");
++MODULE_LICENSE("GPL");