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Rev 4104 Rev 5271
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    This program is distributed in the hope that it will be useful,
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    This program is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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    GNU General Public License for more details.
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    You should have received a copy of the GNU General Public License
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    along with this program; if not, write to the Free Software
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    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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    MA 02110-1301 USA.
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    GNU General Public License for more details.
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 * ------------------------------------------------------------------------- */
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 * ------------------------------------------------------------------------- */
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/* With some changes from Frodo Looijaard , Kyösti Mälkki
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    and Jean Delvare  */
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/* With some changes from Frodo Looijaard , Kyösti Mälkki
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#include
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    and Jean Delvare  */
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#include
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#include
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#include
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#include
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#include
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#include
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#include
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#include
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#include
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#include
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#include
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#include
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#include
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#include
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	do {} while (0)
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	do {} while (0)
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#endif /* DEBUG */
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#endif /* DEBUG */
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/* ----- global variables ---------------------------------------------	*/
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/* ----- global variables ---------------------------------------------	*/
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static int bit_test;	/* see if the line-setting functions work	*/
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static int bit_test = 0;   /* see if the line-setting functions work   */
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MODULE_PARM_DESC(bit_test, "lines testing - 0 off; 1 report; 2 fail if stuck");
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#ifdef DEBUG
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static int i2c_debug = 1;
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#ifdef DEBUG
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module_param(i2c_debug, int, S_IRUGO | S_IWUSR);
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static int i2c_debug = 1;
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MODULE_PARM_DESC(i2c_debug,
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MODULE_PARM_DESC(i2c_debug,
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	/* Not all adapters have scl sense line... */
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	/* Not all adapters have scl sense line... */
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	if (!adap->getscl)
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	if (!adap->getscl)
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		goto done;
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		goto done;
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    start = GetTimerTicks();
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	start = jiffies;
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	while (!getscl(adap)) {
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	while (!getscl(adap)) {
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		/* This hw knows how to read the clock line, so we wait
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		/* This hw knows how to read the clock line, so we wait
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		 * until it actually gets high.  This is safer as some
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		 * until it actually gets high.  This is safer as some
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		 * chips may hold it low ("clock stretching") while they
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		 * chips may hold it low ("clock stretching") while they
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		 * are processing data internally.
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		 * are processing data internally.
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		 */
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		 */
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		if (time_after(GetTimerTicks(), start + adap->timeout)) {
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		if (time_after(jiffies, start + adap->timeout)) {
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			/* Test one last time, as we may have been preempted
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			/* Test one last time, as we may have been preempted
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			 * between last check and timeout test.
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			 * between last check and timeout test.
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			 */
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			 */
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			if (getscl(adap))
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			if (getscl(adap))
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				break;
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				break;
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           return -ETIMEDOUT;
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           return -ETIMEDOUT;
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		}
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		}
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		cpu_relax();
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    }
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#ifdef DEBUG
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	if (jiffies != start && i2c_debug >= 3)
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		pr_debug("i2c-algo-bit: needed %ld jiffies for SCL to go "
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			 "high\n", jiffies - start);
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		asm volatile("rep; nop" ::: "memory");
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#endif
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    }
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done:
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done:
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	udelay(adap->udelay);
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	udelay(adap->udelay);
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{
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{
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	return __i2c_bit_add_bus(adap, NULL);
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	return __i2c_bit_add_bus(adap, NULL);
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}
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}
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MODULE_AUTHOR("Simon G. Vogl ");