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Input: cyapa - add gen5 trackpad force re-calibrate function support 

Add force re-calibrate function support for gen5 trackpad device, it can be
used through sysfs calibrate 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 22:18:14 -08:00 committed by Dmitry Torokhov
parent 6499d390a1
commit daceed1e8e
1 changed files with 65 additions and 0 deletions
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65
drivers/input/mouse/cyapa_gen5.c
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@ -1715,6 +1715,70 @@ static int cyapa_gen5_suspend_scanning(struct cyapa *cyapa)
return 0;
}
static int cyapa_gen5_calibrate_pwcs(struct cyapa *cyapa,
u8 calibrate_sensing_mode_type)
{
struct gen5_app_cmd_head *app_cmd_head;
u8 cmd[8];
u8 resp_data[6];
int resp_len;
int error;
/* Try to dump all buffered data before doing command. */
cyapa_empty_pip_output_data(cyapa, NULL, NULL, NULL);
memset(cmd, 0, sizeof(cmd));
app_cmd_head = (struct gen5_app_cmd_head *)cmd;
put_unaligned_le16(GEN5_OUTPUT_REPORT_ADDR, &app_cmd_head->addr);
put_unaligned_le16(sizeof(cmd) - 2, &app_cmd_head->length);
app_cmd_head->report_id = GEN5_APP_CMD_REPORT_ID;
app_cmd_head->cmd_code = GEN5_CMD_CALIBRATE;
app_cmd_head->parameter_data[0] = calibrate_sensing_mode_type;
resp_len = sizeof(resp_data);
error = cyapa_i2c_pip_cmd_irq_sync(cyapa,
cmd, sizeof(cmd),
resp_data, &resp_len,
5000, cyapa_gen5_sort_tsg_pip_app_resp_data, true);
if (error || !VALID_CMD_RESP_HEADER(resp_data, GEN5_CMD_CALIBRATE) ||
!GEN5_CMD_COMPLETE_SUCCESS(resp_data[5]))
return error < 0 ? error : -EAGAIN;
return 0;
}
static ssize_t cyapa_gen5_do_calibrate(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct cyapa *cyapa = dev_get_drvdata(dev);
int error, calibrate_error;
/* 1. Suspend Scanning*/
error = cyapa_gen5_suspend_scanning(cyapa);
if (error)
return error;
/* 2. Do mutual capacitance fine calibrate. */
calibrate_error = cyapa_gen5_calibrate_pwcs(cyapa,
CYAPA_SENSING_MODE_MUTUAL_CAP_FINE);
if (calibrate_error)
goto resume_scanning;
/* 3. Do self capacitance calibrate. */
calibrate_error = cyapa_gen5_calibrate_pwcs(cyapa,
CYAPA_SENSING_MODE_SELF_CAP);
if (calibrate_error)
goto resume_scanning;
resume_scanning:
/* 4. Resume Scanning*/
error = cyapa_gen5_resume_scanning(cyapa);
if (error || calibrate_error)
return error ? error : calibrate_error;
return count;
}
static s32 twos_complement_to_s32(s32 value, int num_bits)
{
if (value >> (num_bits - 1))
@ -2696,6 +2760,7 @@ const struct cyapa_dev_ops cyapa_gen5_ops = {
.bl_deactivate = cyapa_gen5_bl_deactivate,
.show_baseline = cyapa_gen5_show_baseline,
.calibrate_store = cyapa_gen5_do_calibrate,
.initialize = cyapa_gen5_initialize,