| 12,25 → 12,19 |
|---|
| 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., 51 Franklin Street, Fifth Floor, Boston, |
| MA 02110-1301 USA. |
| * ------------------------------------------------------------------------- */ |
| |
| /* With some changes from Frodo Looijaard <frodol@dds.nl>, Kyösti Mälkki |
| <kmalkki@cc.hut.fi> and Jean Delvare <khali@linux-fr.org> */ |
| <kmalkki@cc.hut.fi> and Jean Delvare <jdelvare@suse.de> */ |
| |
| #include <types.h> |
| #include <list.h> |
| #include <linux/kernel.h> |
| #include <linux/spinlock.h> |
| #include <syscall.h> |
| #include <linux/jiffies.h> |
| #include <errno.h> |
| #include <linux/module.h> |
| #include <linux/delay.h> |
| #include <linux/errno.h> |
| #include <linux/sched.h> |
| #include <linux/i2c.h> |
| #include <linux/i2c-algo-bit.h> |
| #include <syscall.h> |
| |
| #define I2C_FUNC_NOSTART 0x00000010 /* I2C_M_NOSTART */ |
| |
| 49,11 → 43,11 |
|---|
| |
| /* ----- global variables --------------------------------------------- */ |
| |
| static int bit_test = 0; /* see if the line-setting functions work */ |
| static int bit_test; /* see if the line-setting functions work */ |
| MODULE_PARM_DESC(bit_test, "lines testing - 0 off; 1 report; 2 fail if stuck"); |
| |
| #ifdef DEBUG |
| static int i2c_debug = 1; |
| module_param(i2c_debug, int, S_IRUGO | S_IWUSR); |
| MODULE_PARM_DESC(i2c_debug, |
| "debug level - 0 off; 1 normal; 2 verbose; 3 very verbose"); |
| #endif |
| 97,7 → 91,7 |
|---|
| if (!adap->getscl) |
| goto done; |
| |
| start = GetTimerTicks(); |
| start = jiffies; |
| while (!getscl(adap)) { |
| /* This hw knows how to read the clock line, so we wait |
| * until it actually gets high. This is safer as some |
| 104,7 → 98,7 |
|---|
| * chips may hold it low ("clock stretching") while they |
| * are processing data internally. |
| */ |
| if (time_after(GetTimerTicks(), start + adap->timeout)) { |
| if (time_after(jiffies, start + adap->timeout)) { |
| /* Test one last time, as we may have been preempted |
| * between last check and timeout test. |
| */ |
| 112,8 → 106,14 |
|---|
| break; |
| return -ETIMEDOUT; |
| } |
| asm volatile("rep; nop" ::: "memory"); |
| cpu_relax(); |
| } |
| #ifdef DEBUG |
| if (jiffies != start && i2c_debug >= 3) |
| pr_debug("i2c-algo-bit: needed %ld jiffies for SCL to go " |
| "high\n", jiffies - start); |
| #endif |
| |
| done: |
| udelay(adap->udelay); |
| return 0; |
| 650,3 → 650,6 |
|---|
| } |
| |
| |
| MODULE_AUTHOR("Simon G. Vogl <simon@tk.uni-linz.ac.at>"); |
| MODULE_DESCRIPTION("I2C-Bus bit-banging algorithm"); |
| MODULE_LICENSE("GPL"); |