1 files changed, 0 insertions, 434 deletions
diff --git a/ANDROID_3.4.5/drivers/i2c/busses/i2c-au1550.c b/ANDROID_3.4.5/drivers/i2c/busses/i2c-au1550.c
deleted file mode 100644
index 582d616d..00000000
--- a/ANDROID_3.4.5/drivers/i2c/busses/i2c-au1550.c
+++ /dev/null
@@ -1,434 +0,0 @@
-/*
- * i2c-au1550.c: SMBus (i2c) adapter for Alchemy PSC interface
- * Copyright (C) 2004 Embedded Edge, LLC <dan@embeddededge.com>
- *
- * 2.6 port by Matt Porter <mporter@kernel.crashing.org>
- *
- * The documentation describes this as an SMBus controller, but it doesn't
- * understand any of the SMBus protocol in hardware.  It's really an I2C
- * controller that could emulate most of the SMBus in software.
- *
- * This is just a skeleton adapter to use with the Au1550 PSC
- * algorithm.  It was developed for the Pb1550, but will work with
- * any Au1550 board that has a similar PSC configuration.
- *
- * 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 <linux/delay.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/init.h>
-#include <linux/errno.h>
-#include <linux/i2c.h>
-#include <linux/slab.h>
-
-#include <asm/mach-au1x00/au1000.h>
-#include <asm/mach-au1x00/au1xxx_psc.h>
-
-#define PSC_SEL		0x00
-#define PSC_CTRL	0x04
-#define PSC_SMBCFG	0x08
-#define PSC_SMBMSK	0x0C
-#define PSC_SMBPCR	0x10
-#define PSC_SMBSTAT	0x14
-#define PSC_SMBEVNT	0x18
-#define PSC_SMBTXRX	0x1C
-#define PSC_SMBTMR	0x20
-
-struct i2c_au1550_data {
-	void __iomem *psc_base;
-	int	xfer_timeout;
-	struct i2c_adapter adap;
-	struct resource *ioarea;
-};
-
-static inline void WR(struct i2c_au1550_data *a, int r, unsigned long v)
-{
-	__raw_writel(v, a->psc_base + r);
-	wmb();
-}
-
-static inline unsigned long RD(struct i2c_au1550_data *a, int r)
-{
-	return __raw_readl(a->psc_base + r);
-}
-
-static int wait_xfer_done(struct i2c_au1550_data *adap)
-{
-	int i;
-
-	/* Wait for Tx Buffer Empty */
-	for (i = 0; i < adap->xfer_timeout; i++) {
-		if (RD(adap, PSC_SMBSTAT) & PSC_SMBSTAT_TE)
-			return 0;
-
-		udelay(1);
-	}
-
-	return -ETIMEDOUT;
-}
-
-static int wait_ack(struct i2c_au1550_data *adap)
-{
-	unsigned long stat;
-
-	if (wait_xfer_done(adap))
-		return -ETIMEDOUT;
-
-	stat = RD(adap, PSC_SMBEVNT);
-	if ((stat & (PSC_SMBEVNT_DN | PSC_SMBEVNT_AN | PSC_SMBEVNT_AL)) != 0)
-		return -ETIMEDOUT;
-
-	return 0;
-}
-
-static int wait_master_done(struct i2c_au1550_data *adap)
-{
-	int i;
-
-	/* Wait for Master Done. */
-	for (i = 0; i < 2 * adap->xfer_timeout; i++) {
-		if ((RD(adap, PSC_SMBEVNT) & PSC_SMBEVNT_MD) != 0)
-			return 0;
-		udelay(1);
-	}
-
-	return -ETIMEDOUT;
-}
-
-static int
-do_address(struct i2c_au1550_data *adap, unsigned int addr, int rd, int q)
-{
-	unsigned long stat;
-
-	/* Reset the FIFOs, clear events. */
-	stat = RD(adap, PSC_SMBSTAT);
-	WR(adap, PSC_SMBEVNT, PSC_SMBEVNT_ALLCLR);
-
-	if (!(stat & PSC_SMBSTAT_TE) || !(stat & PSC_SMBSTAT_RE)) {
-		WR(adap, PSC_SMBPCR, PSC_SMBPCR_DC);
-		while ((RD(adap, PSC_SMBPCR) & PSC_SMBPCR_DC) != 0)
-			cpu_relax();
-		udelay(50);
-	}
-
-	/* Write out the i2c chip address and specify operation */
-	addr <<= 1;
-	if (rd)
-		addr |= 1;
-
-	/* zero-byte xfers stop immediately */
-	if (q)
-		addr |= PSC_SMBTXRX_STP;
-
-	/* Put byte into fifo, start up master. */
-	WR(adap, PSC_SMBTXRX, addr);
-	WR(adap, PSC_SMBPCR, PSC_SMBPCR_MS);
-	if (wait_ack(adap))
-		return -EIO;
-	return (q) ? wait_master_done(adap) : 0;
-}
-
-static int wait_for_rx_byte(struct i2c_au1550_data *adap, unsigned char *out)
-{
-	int j;
-
-	if (wait_xfer_done(adap))
-		return -EIO;
-
-	j =  adap->xfer_timeout * 100;
-	do {
-		j--;
-		if (j <= 0)
-			return -EIO;
-
-		if ((RD(adap, PSC_SMBSTAT) & PSC_SMBSTAT_RE) == 0)
-			j = 0;
-		else
-			udelay(1);
-	} while (j > 0);
-
-	*out = RD(adap, PSC_SMBTXRX);
-
-	return 0;
-}
-
-static int i2c_read(struct i2c_au1550_data *adap, unsigned char *buf,
-		    unsigned int len)
-{
-	int i;
-
-	if (len == 0)
-		return 0;
-
-	/* A read is performed by stuffing the transmit fifo with
-	 * zero bytes for timing, waiting for bytes to appear in the
-	 * receive fifo, then reading the bytes.
-	 */
-	i = 0;
-	while (i < (len - 1)) {
-		WR(adap, PSC_SMBTXRX, 0);
-		if (wait_for_rx_byte(adap, &buf[i]))
-			return -EIO;
-
-		i++;
-	}
-
-	/* The last byte has to indicate transfer done. */
-	WR(adap, PSC_SMBTXRX, PSC_SMBTXRX_STP);
-	if (wait_master_done(adap))
-		return -EIO;
-
-	buf[i] = (unsigned char)(RD(adap, PSC_SMBTXRX) & 0xff);
-	return 0;
-}
-
-static int i2c_write(struct i2c_au1550_data *adap, unsigned char *buf,
-		     unsigned int len)
-{
-	int i;
-	unsigned long data;
-
-	if (len == 0)
-		return 0;
-
-	i = 0;
-	while (i < (len-1)) {
-		data = buf[i];
-		WR(adap, PSC_SMBTXRX, data);
-		if (wait_ack(adap))
-			return -EIO;
-		i++;
-	}
-
-	/* The last byte has to indicate transfer done. */
-	data = buf[i];
-	data |= PSC_SMBTXRX_STP;
-	WR(adap, PSC_SMBTXRX, data);
-	if (wait_master_done(adap))
-		return -EIO;
-	return 0;
-}
-
-static int
-au1550_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg *msgs, int num)
-{
-	struct i2c_au1550_data *adap = i2c_adap->algo_data;
-	struct i2c_msg *p;
-	int i, err = 0;
-
-	WR(adap, PSC_CTRL, PSC_CTRL_ENABLE);
-
-	for (i = 0; !err && i < num; i++) {
-		p = &msgs[i];
-		err = do_address(adap, p->addr, p->flags & I2C_M_RD,
-				 (p->len == 0));
-		if (err || !p->len)
-			continue;
-		if (p->flags & I2C_M_RD)
-			err = i2c_read(adap, p->buf, p->len);
-		else
-			err = i2c_write(adap, p->buf, p->len);
-	}
-
-	/* Return the number of messages processed, or the error code.
-	*/
-	if (err == 0)
-		err = num;
-
-	WR(adap, PSC_CTRL, PSC_CTRL_SUSPEND);
-
-	return err;
-}
-
-static u32 au1550_func(struct i2c_adapter *adap)
-{
-	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
-}
-
-static const struct i2c_algorithm au1550_algo = {
-	.master_xfer	= au1550_xfer,
-	.functionality	= au1550_func,
-};
-
-static void i2c_au1550_setup(struct i2c_au1550_data *priv)
-{
-	unsigned long cfg;
-
-	WR(priv, PSC_CTRL, PSC_CTRL_DISABLE);
-	WR(priv, PSC_SEL, PSC_SEL_PS_SMBUSMODE);
-	WR(priv, PSC_SMBCFG, 0);
-	WR(priv, PSC_CTRL, PSC_CTRL_ENABLE);
-	while ((RD(priv, PSC_SMBSTAT) & PSC_SMBSTAT_SR) == 0)
-		cpu_relax();
-
-	cfg = PSC_SMBCFG_RT_FIFO8 | PSC_SMBCFG_TT_FIFO8 | PSC_SMBCFG_DD_DISABLE;
-	WR(priv, PSC_SMBCFG, cfg);
-
-	/* Divide by 8 to get a 6.25 MHz clock.  The later protocol
-	 * timings are based on this clock.
-	 */
-	cfg |= PSC_SMBCFG_SET_DIV(PSC_SMBCFG_DIV8);
-	WR(priv, PSC_SMBCFG, cfg);
-	WR(priv, PSC_SMBMSK, PSC_SMBMSK_ALLMASK);
-
-	/* Set the protocol timer values.  See Table 71 in the
-	 * Au1550 Data Book for standard timing values.
-	 */
-	WR(priv, PSC_SMBTMR, PSC_SMBTMR_SET_TH(0) | PSC_SMBTMR_SET_PS(15) | \
-		PSC_SMBTMR_SET_PU(15) | PSC_SMBTMR_SET_SH(15) | \
-		PSC_SMBTMR_SET_SU(15) | PSC_SMBTMR_SET_CL(15) | \
-		PSC_SMBTMR_SET_CH(15));
-
-	cfg |= PSC_SMBCFG_DE_ENABLE;
-	WR(priv, PSC_SMBCFG, cfg);
-	while ((RD(priv, PSC_SMBSTAT) & PSC_SMBSTAT_SR) == 0)
-		cpu_relax();
-
-	WR(priv, PSC_CTRL, PSC_CTRL_SUSPEND);
-}
-
-static void i2c_au1550_disable(struct i2c_au1550_data *priv)
-{
-	WR(priv, PSC_SMBCFG, 0);
-	WR(priv, PSC_CTRL, PSC_CTRL_DISABLE);
-}
-
-/*
- * registering functions to load algorithms at runtime
- * Prior to calling us, the 50MHz clock frequency and routing
- * must have been set up for the PSC indicated by the adapter.
- */
-static int __devinit
-i2c_au1550_probe(struct platform_device *pdev)
-{
-	struct i2c_au1550_data *priv;
-	struct resource *r;
-	int ret;
-
-	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!r) {
-		ret = -ENODEV;
-		goto out;
-	}
-
-	priv = kzalloc(sizeof(struct i2c_au1550_data), GFP_KERNEL);
-	if (!priv) {
-		ret = -ENOMEM;
-		goto out;
-	}
-
-	priv->ioarea = request_mem_region(r->start, resource_size(r),
-					  pdev->name);
-	if (!priv->ioarea) {
-		ret = -EBUSY;
-		goto out_mem;
-	}
-
-	priv->psc_base = ioremap(r->start, resource_size(r));
-	if (!priv->psc_base) {
-		ret = -EIO;
-		goto out_map;
-	}
-	priv->xfer_timeout = 200;
-
-	priv->adap.nr = pdev->id;
-	priv->adap.algo = &au1550_algo;
-	priv->adap.algo_data = priv;
-	priv->adap.dev.parent = &pdev->dev;
-	strlcpy(priv->adap.name, "Au1xxx PSC I2C", sizeof(priv->adap.name));
-
-	/* Now, set up the PSC for SMBus PIO mode. */
-	i2c_au1550_setup(priv);
-
-	ret = i2c_add_numbered_adapter(&priv->adap);
-	if (ret == 0) {
-		platform_set_drvdata(pdev, priv);
-		return 0;
-	}
-
-	i2c_au1550_disable(priv);
-	iounmap(priv->psc_base);
-out_map:
-	release_resource(priv->ioarea);
-	kfree(priv->ioarea);
-out_mem:
-	kfree(priv);
-out:
-	return ret;
-}
-
-static int __devexit i2c_au1550_remove(struct platform_device *pdev)
-{
-	struct i2c_au1550_data *priv = platform_get_drvdata(pdev);
-
-	platform_set_drvdata(pdev, NULL);
-	i2c_del_adapter(&priv->adap);
-	i2c_au1550_disable(priv);
-	iounmap(priv->psc_base);
-	release_resource(priv->ioarea);
-	kfree(priv->ioarea);
-	kfree(priv);
-	return 0;
-}
-
-#ifdef CONFIG_PM
-static int i2c_au1550_suspend(struct device *dev)
-{
-	struct i2c_au1550_data *priv = dev_get_drvdata(dev);
-
-	i2c_au1550_disable(priv);
-
-	return 0;
-}
-
-static int i2c_au1550_resume(struct device *dev)
-{
-	struct i2c_au1550_data *priv = dev_get_drvdata(dev);
-
-	i2c_au1550_setup(priv);
-
-	return 0;
-}
-
-static const struct dev_pm_ops i2c_au1550_pmops = {
-	.suspend	= i2c_au1550_suspend,
-	.resume		= i2c_au1550_resume,
-};
-
-#define AU1XPSC_SMBUS_PMOPS (&i2c_au1550_pmops)
-
-#else
-#define AU1XPSC_SMBUS_PMOPS NULL
-#endif
-
-static struct platform_driver au1xpsc_smbus_driver = {
-	.driver = {
-		.name	= "au1xpsc_smbus",
-		.owner	= THIS_MODULE,
-		.pm	= AU1XPSC_SMBUS_PMOPS,
-	},
-	.probe		= i2c_au1550_probe,
-	.remove		= __devexit_p(i2c_au1550_remove),
-};
-
-module_platform_driver(au1xpsc_smbus_driver);
-
-MODULE_AUTHOR("Dan Malek, Embedded Edge, LLC.");
-MODULE_DESCRIPTION("SMBus adapter Alchemy pb1550");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:au1xpsc_smbus");