From daceed1e8e57ce8ca57f5602296f2b8bc2f1c3e5 Mon Sep 17 00:00:00 2001 From: Dudley Du Date: Sat, 17 Jan 2015 22:18:14 -0800 Subject: [PATCH] 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 Tested-by: Jeremiah Mahler Signed-off-by: Dmitry Torokhov --- drivers/input/mouse/cyapa_gen5.c | 65 ++++++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) diff --git a/drivers/input/mouse/cyapa_gen5.c b/drivers/input/mouse/cyapa_gen5.c index 7c6e3393fef1..ced2a2c641cc 100644 --- a/drivers/input/mouse/cyapa_gen5.c +++ b/drivers/input/mouse/cyapa_gen5.c @@ -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, -- 2.20.1