#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/delay.h>
+#include <linux/jiffies.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/wait.h>
/* Data sheet recommends 59kHz for 100kHz operation due to variation
* in the actual clock rate */
-static int clock = I2C_PCA_CON_59kHz;
+static int clock = 59000;
+static struct i2c_adapter pca_isa_ops;
static wait_queue_head_t pca_wait;
static void pca_isa_writebyte(void *pd, int reg, int val)
{
#ifdef DEBUG_IO
static char *names[] = { "T/O", "DAT", "ADR", "CON" };
- printk("*** write %s at %#lx <= %#04x\n", names[reg], base+reg, val);
+ printk(KERN_DEBUG "*** write %s at %#lx <= %#04x\n", names[reg],
+ base+reg, val);
#endif
outb(val, base+reg);
}
#ifdef DEBUG_IO
{
static char *names[] = { "STA", "DAT", "ADR", "CON" };
- printk("*** read %s => %#04x\n", names[reg], res);
+ printk(KERN_DEBUG "*** read %s => %#04x\n", names[reg], res);
}
#endif
return res;
static int pca_isa_waitforcompletion(void *pd)
{
- int ret = 0;
+ long ret = ~0;
+ unsigned long timeout;
if (irq > -1) {
- ret = wait_event_interruptible(pca_wait,
- pca_isa_readbyte(pd, I2C_PCA_CON) & I2C_PCA_CON_SI);
+ ret = wait_event_interruptible_timeout(pca_wait,
+ pca_isa_readbyte(pd, I2C_PCA_CON)
+ & I2C_PCA_CON_SI, pca_isa_ops.timeout);
} else {
- while ((pca_isa_readbyte(pd, I2C_PCA_CON) & I2C_PCA_CON_SI) == 0)
+ /* Do polling */
+ timeout = jiffies + pca_isa_ops.timeout;
+ while (((pca_isa_readbyte(pd, I2C_PCA_CON)
+ & I2C_PCA_CON_SI) == 0)
+ && (ret = time_before(jiffies, timeout)))
udelay(100);
}
- return ret;
+ return ret > 0;
}
static void pca_isa_resetchip(void *pd)
static struct i2c_adapter pca_isa_ops = {
.owner = THIS_MODULE,
.algo_data = &pca_isa_data,
- .name = "PCA9564 ISA Adapter",
- .timeout = 100,
+ .name = "PCA9564/PCA9665 ISA Adapter",
+ .timeout = HZ,
};
static int __devinit pca_isa_match(struct device *dev, unsigned int id)
}
MODULE_AUTHOR("Ian Campbell <icampbell@arcom.com>");
-MODULE_DESCRIPTION("ISA base PCA9564 driver");
+MODULE_DESCRIPTION("ISA base PCA9564/PCA9665 driver");
MODULE_LICENSE("GPL");
module_param(base, ulong, 0);
module_param(irq, int, 0);
MODULE_PARM_DESC(irq, "IRQ");
module_param(clock, int, 0);
-MODULE_PARM_DESC(clock, "Clock rate as described in table 1 of PCA9564 datasheet");
+MODULE_PARM_DESC(clock, "Clock rate in hertz.\n\t\t"
+ "For PCA9564: 330000,288000,217000,146000,"
+ "88000,59000,44000,36000\n"
+ "\t\tFor PCA9665:\tStandard: 60300 - 100099\n"
+ "\t\t\t\tFast: 100100 - 400099\n"
+ "\t\t\t\tFast+: 400100 - 10000099\n"
+ "\t\t\t\tTurbo: Up to 1265800");
module_init(pca_isa_init);
module_exit(pca_isa_exit);