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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/input/rmi4/rmi_f55.c
parentInitial commit. (diff)
downloadlinux-upstream.tar.xz
linux-upstream.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/input/rmi4/rmi_f55.c')
-rw-r--r--drivers/input/rmi4/rmi_f55.c128
1 files changed, 128 insertions, 0 deletions
diff --git a/drivers/input/rmi4/rmi_f55.c b/drivers/input/rmi4/rmi_f55.c
new file mode 100644
index 000000000..488adaca4
--- /dev/null
+++ b/drivers/input/rmi4/rmi_f55.c
@@ -0,0 +1,128 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2012-2015 Synaptics Incorporated
+ * Copyright (C) 2016 Zodiac Inflight Innovations
+ */
+
+#include <linux/bitops.h>
+#include <linux/kernel.h>
+#include <linux/rmi.h>
+#include <linux/slab.h>
+#include "rmi_driver.h"
+
+#define F55_NAME "rmi4_f55"
+
+/* F55 data offsets */
+#define F55_NUM_RX_OFFSET 0
+#define F55_NUM_TX_OFFSET 1
+#define F55_PHYS_CHAR_OFFSET 2
+
+/* Only read required query registers */
+#define F55_QUERY_LEN 3
+
+/* F55 capabilities */
+#define F55_CAP_SENSOR_ASSIGN BIT(0)
+
+struct f55_data {
+ struct rmi_function *fn;
+
+ u8 qry[F55_QUERY_LEN];
+ u8 num_rx_electrodes;
+ u8 cfg_num_rx_electrodes;
+ u8 num_tx_electrodes;
+ u8 cfg_num_tx_electrodes;
+};
+
+static int rmi_f55_detect(struct rmi_function *fn)
+{
+ struct rmi_device *rmi_dev = fn->rmi_dev;
+ struct rmi_driver_data *drv_data = dev_get_drvdata(&rmi_dev->dev);
+ struct f55_data *f55;
+ int error;
+
+ f55 = dev_get_drvdata(&fn->dev);
+
+ error = rmi_read_block(fn->rmi_dev, fn->fd.query_base_addr,
+ &f55->qry, sizeof(f55->qry));
+ if (error) {
+ dev_err(&fn->dev, "%s: Failed to query F55 properties\n",
+ __func__);
+ return error;
+ }
+
+ f55->num_rx_electrodes = f55->qry[F55_NUM_RX_OFFSET];
+ f55->num_tx_electrodes = f55->qry[F55_NUM_TX_OFFSET];
+
+ f55->cfg_num_rx_electrodes = f55->num_rx_electrodes;
+ f55->cfg_num_tx_electrodes = f55->num_rx_electrodes;
+
+ drv_data->num_rx_electrodes = f55->cfg_num_rx_electrodes;
+ drv_data->num_tx_electrodes = f55->cfg_num_rx_electrodes;
+
+ if (f55->qry[F55_PHYS_CHAR_OFFSET] & F55_CAP_SENSOR_ASSIGN) {
+ int i, total;
+ u8 buf[256];
+
+ /*
+ * Calculate the number of enabled receive and transmit
+ * electrodes by reading F55:Ctrl1 (sensor receiver assignment)
+ * and F55:Ctrl2 (sensor transmitter assignment). The number of
+ * enabled electrodes is the sum of all field entries with a
+ * value other than 0xff.
+ */
+ error = rmi_read_block(fn->rmi_dev,
+ fn->fd.control_base_addr + 1,
+ buf, f55->num_rx_electrodes);
+ if (!error) {
+ total = 0;
+ for (i = 0; i < f55->num_rx_electrodes; i++) {
+ if (buf[i] != 0xff)
+ total++;
+ }
+ f55->cfg_num_rx_electrodes = total;
+ drv_data->num_rx_electrodes = total;
+ }
+
+ error = rmi_read_block(fn->rmi_dev,
+ fn->fd.control_base_addr + 2,
+ buf, f55->num_tx_electrodes);
+ if (!error) {
+ total = 0;
+ for (i = 0; i < f55->num_tx_electrodes; i++) {
+ if (buf[i] != 0xff)
+ total++;
+ }
+ f55->cfg_num_tx_electrodes = total;
+ drv_data->num_tx_electrodes = total;
+ }
+ }
+
+ rmi_dbg(RMI_DEBUG_FN, &fn->dev, "F55 num_rx_electrodes: %d (raw %d)\n",
+ f55->cfg_num_rx_electrodes, f55->num_rx_electrodes);
+ rmi_dbg(RMI_DEBUG_FN, &fn->dev, "F55 num_tx_electrodes: %d (raw %d)\n",
+ f55->cfg_num_tx_electrodes, f55->num_tx_electrodes);
+
+ return 0;
+}
+
+static int rmi_f55_probe(struct rmi_function *fn)
+{
+ struct f55_data *f55;
+
+ f55 = devm_kzalloc(&fn->dev, sizeof(struct f55_data), GFP_KERNEL);
+ if (!f55)
+ return -ENOMEM;
+
+ f55->fn = fn;
+ dev_set_drvdata(&fn->dev, f55);
+
+ return rmi_f55_detect(fn);
+}
+
+struct rmi_function_handler rmi_f55_handler = {
+ .driver = {
+ .name = F55_NAME,
+ },
+ .func = 0x55,
+ .probe = rmi_f55_probe,
+};