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Input: cyapa - add gen3 trackpad read baseline support 

Add read baseline function supported for gen3 trackpad device, it can be
used through sysfs baseline interface.

Signed-off-by: Dudley Du <dudl@cypress.com>
Tested-by: Jeremiah Mahler <jmmahler@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Dudley Du 2015-01-17 22:12:32 -08:00 committed by Dmitry Torokhov
parent 87b26d7288
commit f50efd06e0
1 changed files with 72 additions and 0 deletions
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72
drivers/input/mouse/cyapa_gen3.c
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@ -783,6 +783,76 @@ static int cyapa_gen3_do_fw_update(struct cyapa *cyapa,
return 0;
}
static ssize_t cyapa_gen3_show_baseline(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct cyapa *cyapa = dev_get_drvdata(dev);
int max_baseline, min_baseline;
int tries;
int ret;
ret = cyapa_read_byte(cyapa, CYAPA_CMD_DEV_STATUS);
if (ret < 0) {
dev_err(dev, "Error reading dev status. err = %d\n", ret);
goto out;
}
if ((ret & CYAPA_DEV_NORMAL) != CYAPA_DEV_NORMAL) {
dev_warn(dev, "Trackpad device is busy. device state = 0x%x\n",
ret);
ret = -EAGAIN;
goto out;
}
ret = cyapa_write_byte(cyapa, CYAPA_CMD_SOFT_RESET,
OP_REPORT_BASELINE_MASK);
if (ret < 0) {
dev_err(dev, "Failed to send report baseline command. %d\n",
ret);
goto out;
}
tries = 3; /* Try for 30 to 60 ms */
do {
usleep_range(10000, 20000);
ret = cyapa_read_byte(cyapa, CYAPA_CMD_DEV_STATUS);
if (ret < 0) {
dev_err(dev, "Error reading dev status. err = %d\n",
ret);
goto out;
}
if ((ret & CYAPA_DEV_NORMAL) == CYAPA_DEV_NORMAL)
break;
} while (--tries);
if (tries == 0) {
dev_err(dev, "Device timed out going to Normal state.\n");
ret = -ETIMEDOUT;
goto out;
}
ret = cyapa_read_byte(cyapa, CYAPA_CMD_MAX_BASELINE);
if (ret < 0) {
dev_err(dev, "Failed to read max baseline. err = %d\n", ret);
goto out;
}
max_baseline = ret;
ret = cyapa_read_byte(cyapa, CYAPA_CMD_MIN_BASELINE);
if (ret < 0) {
dev_err(dev, "Failed to read min baseline. err = %d\n", ret);
goto out;
}
min_baseline = ret;
dev_dbg(dev, "Baseline report successful. Max: %d Min: %d\n",
max_baseline, min_baseline);
ret = scnprintf(buf, PAGE_SIZE, "%d %d\n", max_baseline, min_baseline);
out:
return ret;
}
/*
* cyapa_get_wait_time_for_pwr_cmd
*
@ -1104,6 +1174,8 @@ const struct cyapa_dev_ops cyapa_gen3_ops = {
.bl_deactivate = cyapa_gen3_bl_deactivate,
.bl_initiate = cyapa_gen3_bl_initiate,
.show_baseline = cyapa_gen3_show_baseline,
.initialize = cyapa_gen3_initialize,
.state_parse = cyapa_gen3_state_parse,