Add read raw data function supported for gen5 trackpad device,
it can be used through debugfs raw_data interface.
TEST=test on Chromebooks.
Signed-off-by: Dudley Du <dudley.duli...@gmail.com>
---
drivers/input/mouse/cyapa_gen5.c | 138 +++++++++++++++++++++++++++++++++++++++
1 file changed, 138 insertions(+)
diff --git a/drivers/input/mouse/cyapa_gen5.c b/drivers/input/mouse/cyapa_gen5.c
index f75461c..af098d4 100644
--- a/drivers/input/mouse/cyapa_gen5.c
+++ b/drivers/input/mouse/cyapa_gen5.c
@@ -2363,6 +2363,143 @@ resume_scanning:
return size;
}
+static int cyapa_gen5_read_electrodies_rx_tx(struct cyapa *cyapa)
+{
+ u8 cmd[7] = { 0x04, 0x00, 0x05, 0x00, 0x2f, 0x00, 0x71 };
+ u8 resp_data[7];
+ int resp_len;
+ int error;
+
+ resp_len = sizeof(resp_data);
+ error = cyapa_i2c_pip_cmd_irq_sync(cyapa,
+ cmd, 7,
+ resp_data, &resp_len,
+ 150, cyapa_gen5_sort_tsg_pip_app_resp_data, true);
+ if (error || !VALID_CMD_RESP_HEADER(resp_data, 0x71) ||
+ !resp_data[5] || !resp_data[6])
+ return -EINVAL;
+
+ cyapa->electrodes_rx = resp_data[6];
+
+ return 0;
+}
+
+static int cyapa_gen5_read_raw_data(struct cyapa *cyapa)
+{
+ int raw_cap_mutual_max, raw_cap_mutual_min, raw_cap_mutual_ave;
+ int raw_cap_self_max, raw_cap_self_min, raw_cap_self_ave;
+ int offset;
+ int data_size, max, min, ave;
+ ktime_t time_mono;
+ int error, resume_error;
+
+ offset = 0;
+ if (!cyapa->tp_raw_data) {
+ if (cyapa->state != CYAPA_STATE_GEN5_APP ||
+ !cyapa->electrodes_x || !cyapa->electrodes_y)
+ return -EINVAL;
+
+ cyapa->tp_raw_data_size = sizeof(s32) * (cyapa->electrodes_x *
+ cyapa->electrodes_y + cyapa->electrodes_x +
+ cyapa->electrodes_y) + GEN5_RAW_DATA_HEAD_SIZE;
+ /*
+ * This buffer will be hold after used until the driver is
+ * unloaded, the purpose of it is to improve the performace
+ * to avoid frequently allocate and release the buffer.
+ */
+ cyapa->tp_raw_data = devm_kzalloc(&cyapa->client->dev,
+ cyapa->tp_raw_data_size, GFP_KERNEL);
+ if (!cyapa->tp_raw_data)
+ return -ENOMEM;
+ }
+
+ /*
+ * 1. Suspend Scanning.
+ *
+ * After suspend scanning, the raw data will not be updated,
+ * so the time of the raw data is before scanning suspended.
+ */
+ time_mono = ktime_get();
+ error = cyapa_gen5_suspend_scanning(cyapa);
+ if (error)
+ return error;
+
+ /* 2. Get the correct electrodes_rx number. */
+ if (cyapa->electrodes_rx == 0) {
+ error = cyapa_gen5_read_electrodies_rx_tx(cyapa);
+ if (error || cyapa->electrodes_rx == 0) {
+ cyapa_empty_pip_output_data(cyapa, NULL, NULL, NULL);
+
+ /*
+ * Since, old firmware doesn't support the command to
+ * read the electrodies' Rx and Tx values, so using
+ * the read global idac interface to get the Rx number,
+ * this value is useful to analyze and
+ * display the raw data map in userspace.
+ */
+ data_size = 0;
+ error = cyapa_gen5_read_idac_data(cyapa,
+ GEN5_CMD_RETRIEVE_DATA_STRUCTURE,
+ GEN5_RETRIEVE_MUTUAL_PWC_DATA,
+ &data_size, &max, &min, &ave);
+ if (error || cyapa->electrodes_rx == 0)
+ goto resume_scanning;
+ }
+ }
+
+ /* 3. Execuate panel scan. It must be executed before read data. */
+ error = cyapa_gen5_execute_panel_scan(cyapa);
+ if (error)
+ goto resume_scanning;
+
+ /* 4. Retrieve panel scan, mutual cap raw data. */
+ offset = GEN5_RAW_DATA_HEAD_SIZE;
+ error = cyapa_gen5_read_panel_scan_raw_data(cyapa,
+ GEN5_CMD_RETRIEVE_PANEL_SCAN,
+ GEN5_PANEL_SCAN_MUTUAL_DIFFCOUNT,
+ cyapa->electrodes_x * cyapa->electrodes_y,
+ &raw_cap_mutual_max, &raw_cap_mutual_min,
+ &raw_cap_mutual_ave,
+ cyapa->tp_raw_data + offset);
+ if (error)
+ goto resume_scanning;
+
+ offset += sizeof(s32) * cyapa->electrodes_x * cyapa->electrodes_y;
+
+ /* 5. Retrieve panel scan, self cap raw data. */
+ error = cyapa_gen5_read_panel_scan_raw_data(cyapa,
+ GEN5_CMD_RETRIEVE_PANEL_SCAN,
+ GEN5_PANEL_SCAN_SELF_DIFFCOUNT,
+ cyapa->electrodes_x + cyapa->electrodes_y,
+ &raw_cap_self_max, &raw_cap_self_min,
+ &raw_cap_self_ave,
+ cyapa->tp_raw_data + offset);
+ if (error)
+ goto resume_scanning;
+
+ offset += sizeof(s32) * (cyapa->electrodes_x + cyapa->electrodes_y);
+
+resume_scanning:
+ /* 6. Resume Scanning*/
+ resume_error = cyapa_gen5_resume_scanning(cyapa);
+ if (resume_error || error)
+ return resume_error ? resume_error : error;
+
+ *((struct timeval *)&cyapa->tp_raw_data[0]) =
+ ktime_to_timeval(time_mono);
+ cyapa->tp_raw_data[16] = (u8)cyapa->electrodes_x;
+ cyapa->tp_raw_data[17] = (u8)cyapa->electrodes_y;
+ cyapa->tp_raw_data[18] = (u8)cyapa->x_origin;
+ cyapa->tp_raw_data[19] = (u8)cyapa->y_origin;
+ cyapa->tp_raw_data[20] = (u8)sizeof(s32);
+ cyapa->tp_raw_data[21] = (u8)sizeof(s32);
+ cyapa->tp_raw_data[22] = (u8)cyapa->electrodes_rx;
+ cyapa->tp_raw_data[23] = 0; /* Reserved. */
+
+ cyapa->tp_raw_data_size = offset;
+ return 0;
+}
+
static bool cyapa_gen5_sort_system_info_data(struct cyapa *cyapa,
u8 *buf, int len)
{
@@ -2777,6 +2914,7 @@ const struct cyapa_dev_ops cyapa_gen5_ops = {
.calibrate_store = cyapa_gen5_do_calibrate,
.read_fw = cyapa_gen5_read_fw,
+ .read_raw_data = cyapa_gen5_read_raw_data,
.initialize = cyapa_gen5_initialize,
--
1.9.1
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