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Date: Wed, 21 Dec 2011 18:10:01 -0800
From: Christopher Heiny <cheiny@...aptics.com>
To: Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc: Jean Delvare <khali@...ux-fr.org>,
Linux Kernel <linux-kernel@...r.kernel.org>,
Linux Input <linux-input@...r.kernel.org>,
Christopher Heiny <cheiny@...aptics.com>,
Joerie de Gram <j.de.gram@...il.com>,
Linus Walleij <linus.walleij@...ricsson.com>,
Naveen Kumar Gaddipati <naveen.gaddipati@...ricsson.com>
Subject: [RFC PATCH 10/11] input: RMI4 F19 - capacitive buttons
Signed-off-by: Christopher Heiny <cheiny@...aptics.com>
Cc: Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc: Linus Walleij <linus.walleij@...ricsson.com>
Cc: Naveen Kumar Gaddipati <naveen.gaddipati@...ricsson.com>
Cc: Joeri de Gram <j.de.gram@...il.com>
---
drivers/input/rmi4/rmi_f19.c | 1571 ++++++++++++++++++++++++++++++++++++++++++
1 files changed, 1571 insertions(+), 0 deletions(-)
diff --git a/drivers/input/rmi4/rmi_f19.c b/drivers/input/rmi4/rmi_f19.c
new file mode 100644
index 0000000..a678f30
--- /dev/null
+++ b/drivers/input/rmi4/rmi_f19.c
@@ -0,0 +1,1571 @@
+/*
+ * Copyright (c) 2011 Synaptics Incorporated
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <linux/kernel.h>
+#include <linux/rmi.h>
+#include <linux/input.h>
+#include <linux/slab.h>
+
+#define QUERY_BASE_INDEX 1
+#define MAX_LEN 256
+
+struct f19_0d_query {
+ union {
+ struct {
+ u8 configurable:1;
+ u8 has_sensitivity_adjust:1;
+ u8 has_hysteresis_threshold:1;
+ };
+ u8 f19_0d_query0;
+ };
+ u8 f19_0d_query1:5;
+};
+
+struct f19_0d_control_0 {
+ union {
+ struct {
+ u8 button_usage:2;
+ u8 filter_mode:2;
+ };
+ u8 f19_0d_control0;
+ };
+};
+
+struct f19_0d_control_1 {
+ u8 int_enabled_button;
+};
+
+struct f19_0d_control_2 {
+ u8 single_button;
+};
+
+struct f19_0d_control_3_4 {
+ u8 sensor_map_button:7;
+ /*u8 sensitivity_button;*/
+};
+
+struct f19_0d_control_5 {
+ u8 sensitivity_adj;
+};
+struct f19_0d_control_6 {
+ u8 hysteresis_threshold;
+};
+
+struct f19_0d_control {
+ struct f19_0d_control_0 *general_control;
+ struct f19_0d_control_1 *button_int_enable;
+ struct f19_0d_control_2 *single_button_participation;
+ struct f19_0d_control_3_4 *sensor_map;
+ struct f19_0d_control_5 *all_button_sensitivity_adj;
+ struct f19_0d_control_6 *all_button_hysteresis_threshold;
+};
+/* data specific to fn $19 that needs to be kept around */
+struct f19_data {
+ struct f19_0d_control *button_control;
+ struct f19_0d_query button_query;
+ u8 button_rezero;
+ bool *button_down;
+ unsigned char button_count;
+ unsigned char button_data_buffer_size;
+ unsigned char *button_data_buffer;
+ unsigned char *button_map;
+ char input_name[MAX_LEN];
+ char input_phys[MAX_LEN];
+ struct input_dev *input;
+};
+
+static ssize_t rmi_f19_button_count_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf);
+
+static ssize_t rmi_f19_button_map_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
+static ssize_t rmi_f19_button_map_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count);
+static ssize_t rmi_f19_rezero_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf);
+static ssize_t rmi_f19_rezero_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count);
+static ssize_t rmi_f19_has_hysteresis_threshold_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+static ssize_t rmi_f19_has_sensitivity_adjust_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+static ssize_t rmi_f19_configurable_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+static ssize_t rmi_f19_filter_mode_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf);
+static ssize_t rmi_f19_filter_mode_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count);
+static ssize_t rmi_f19_button_usage_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf);
+static ssize_t rmi_f19_button_usage_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count);
+static ssize_t rmi_f19_interrupt_enable_button_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf);
+static ssize_t rmi_f19_interrupt_enable_button_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count);
+static ssize_t rmi_f19_single_button_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf);
+static ssize_t rmi_f19_single_button_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count);
+static ssize_t rmi_f19_sensor_map_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf);
+static ssize_t rmi_f19_sensor_map_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count);
+static ssize_t rmi_f19_sensitivity_adjust_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf);
+static ssize_t rmi_f19_sensitivity_adjust_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count);
+static ssize_t rmi_f19_hysteresis_threshold_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf);
+static ssize_t rmi_f19_hysteresis_threshold_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count);
+
+
+
+static inline int rmi_f19_alloc_memory(struct rmi_function_container *fc);
+
+static inline void rmi_f19_free_memory(struct rmi_function_container *fc);
+
+static inline int rmi_f19_initialize(struct rmi_function_container *fc);
+
+static inline int rmi_f19_register_device(struct rmi_function_container *fc);
+
+static inline int rmi_f19_create_sysfs(struct rmi_function_container *fc);
+
+static int rmi_f19_config(struct rmi_function_container *fc);
+
+static int rmi_f19_reset(struct rmi_function_container *fc);
+
+static struct device_attribute attrs[] = {
+ __ATTR(button_count, RMI_RO_ATTR,
+ rmi_f19_button_count_show, rmi_store_error),
+ __ATTR(button_map, RMI_RW_ATTR,
+ rmi_f19_button_map_show, rmi_f19_button_map_store),
+ __ATTR(rezero, RMI_RW_ATTR,
+ rmi_f19_rezero_show, rmi_f19_rezero_store),
+ __ATTR(has_hysteresis_threshold, RMI_RO_ATTR,
+ rmi_f19_has_hysteresis_threshold_show, rmi_store_error),
+ __ATTR(has_sensitivity_adjust, RMI_RO_ATTR,
+ rmi_f19_has_sensitivity_adjust_show, rmi_store_error),
+ __ATTR(configurable, RMI_RO_ATTR,
+ rmi_f19_configurable_show, rmi_store_error),
+ __ATTR(filter_mode, RMI_RW_ATTR,
+ rmi_f19_filter_mode_show, rmi_f19_filter_mode_store),
+ __ATTR(button_usage, RMI_RW_ATTR,
+ rmi_f19_button_usage_show, rmi_f19_button_usage_store),
+ __ATTR(interrupt_enable_button, RMI_RW_ATTR,
+ rmi_f19_interrupt_enable_button_show,
+ rmi_f19_interrupt_enable_button_store),
+ __ATTR(single_button, RMI_RW_ATTR,
+ rmi_f19_single_button_show, rmi_f19_single_button_store),
+ __ATTR(sensor_map, RMI_RW_ATTR,
+ rmi_f19_sensor_map_show, rmi_f19_sensor_map_store),
+ __ATTR(sensitivity_adjust, RMI_RW_ATTR,
+ rmi_f19_sensitivity_adjust_show,
+ rmi_f19_sensitivity_adjust_store),
+ __ATTR(hysteresis_threshold, RMI_RW_ATTR,
+ rmi_f19_hysteresis_threshold_show,
+ rmi_f19_hysteresis_threshold_store)
+};
+
+
+int rmi_f19_read_control_parameters(struct rmi_device *rmi_dev,
+ struct f19_0d_control *button_control,
+ unsigned char button_count,
+ unsigned char int_button_enabled_count,
+ u8 ctrl_base_addr)
+{
+ int error = 0;
+ int i;
+
+ if (button_control->general_control) {
+ error = rmi_read_block(rmi_dev, ctrl_base_addr,
+ (u8 *)button_control->general_control,
+ sizeof(struct f19_0d_control_0));
+ if (error < 0) {
+ dev_err(&rmi_dev->dev,
+ "Failed to read f19_0d_control_0, code:"
+ " %d.\n", error);
+ return error;
+ }
+ ctrl_base_addr = ctrl_base_addr +
+ sizeof(struct f19_0d_control_0);
+ }
+
+ if (button_control->button_int_enable) {
+ for (i = 0; i < int_button_enabled_count; i++) {
+ error = rmi_read_block(rmi_dev, ctrl_base_addr,
+ (u8 *)&button_control->button_int_enable[i],
+ sizeof(struct f19_0d_control_1));
+ if (error < 0) {
+ dev_err(&rmi_dev->dev,
+ "Failed to read f19_0d_control_2,"
+ " code: %d.\n", error);
+ return error;
+ }
+ ctrl_base_addr = ctrl_base_addr +
+ sizeof(struct f19_0d_control_1);
+ }
+ }
+
+ if (button_control->single_button_participation) {
+ for (i = 0; i < int_button_enabled_count; i++) {
+ error = rmi_read_block(rmi_dev, ctrl_base_addr,
+ (u8 *)&button_control->
+ single_button_participation[i],
+ sizeof(struct f19_0d_control_2));
+ if (error < 0) {
+ dev_err(&rmi_dev->dev,
+ "Failed to read f19_0d_control_2,"
+ " code: %d.\n", error);
+ return error;
+ }
+ ctrl_base_addr = ctrl_base_addr +
+ sizeof(struct f19_0d_control_2);
+ }
+ }
+
+ if (button_control->sensor_map) {
+ for (i = 0; i < button_count; i++) {
+ error = rmi_read_block(rmi_dev, ctrl_base_addr,
+ (u8 *)&button_control->sensor_map[i],
+ sizeof(struct f19_0d_control_3_4));
+ if (error < 0) {
+ dev_err(&rmi_dev->dev,
+ "Failed to read f19_0d_control_3_4,"
+ " code: %d.\n", error);
+ return error;
+ }
+ ctrl_base_addr = ctrl_base_addr +
+ sizeof(struct f19_0d_control_3_4);
+ }
+ }
+
+ if (button_control->all_button_sensitivity_adj) {
+ error = rmi_read_block(rmi_dev, ctrl_base_addr,
+ (u8 *)button_control->
+ all_button_sensitivity_adj,
+ sizeof(struct f19_0d_control_5));
+ if (error < 0) {
+ dev_err(&rmi_dev->dev,
+ "Failed to read f19_0d_control_5,"
+ " code: %d.\n", error);
+ return error;
+ }
+ ctrl_base_addr = ctrl_base_addr +
+ sizeof(struct f19_0d_control_5);
+ }
+
+ if (button_control->all_button_hysteresis_threshold) {
+ error = rmi_read_block(rmi_dev, ctrl_base_addr,
+ (u8 *)button_control->
+ all_button_hysteresis_threshold,
+ sizeof(struct f19_0d_control_6));
+ if (error < 0) {
+ dev_err(&rmi_dev->dev,
+ "Failed to read f19_0d_control_6,"
+ " code: %d.\n", error);
+ return error;
+ }
+ ctrl_base_addr = ctrl_base_addr +
+ sizeof(struct f19_0d_control_6);
+ }
+ return 0;
+}
+
+
+static int rmi_f19_init(struct rmi_function_container *fc)
+{
+ int rc;
+
+ rc = rmi_f19_alloc_memory(fc);
+ if (rc < 0)
+ goto err_free_data;
+
+ rc = rmi_f19_initialize(fc);
+ if (rc < 0)
+ goto err_free_data;
+
+ rc = rmi_f19_register_device(fc);
+ if (rc < 0)
+ goto err_free_data;
+
+ rc = rmi_f19_create_sysfs(fc);
+ if (rc < 0)
+ goto err_free_data;
+
+ return 0;
+
+err_free_data:
+ rmi_f19_free_memory(fc);
+
+ return rc;
+}
+
+
+static inline int rmi_f19_alloc_memory(struct rmi_function_container *fc)
+{
+ struct f19_data *f19;
+ int rc;
+
+ f19 = kzalloc(sizeof(struct f19_data), GFP_KERNEL);
+ if (!f19) {
+ dev_err(&fc->dev, "Failed to allocate function data.\n");
+ return -ENOMEM;
+ }
+ fc->data = f19;
+
+ rc = rmi_read_block(fc->rmi_dev,
+ fc->fd.query_base_addr,
+ (u8 *)&f19->button_query,
+ sizeof(struct f19_0d_query));
+ if (rc < 0) {
+ dev_err(&fc->dev, "Failed to read query register.\n");
+ return rc;
+ }
+
+ f19->button_count = f19->button_query.f19_0d_query1;
+
+ f19->button_down = kcalloc(f19->button_count,
+ sizeof(bool), GFP_KERNEL);
+ if (!f19->button_down) {
+ dev_err(&fc->dev, "Failed to allocate button state buffer.\n");
+ return -ENOMEM;
+ }
+
+ f19->button_data_buffer_size = (f19->button_count + 7) / 8;
+ f19->button_data_buffer =
+ kcalloc(f19->button_data_buffer_size,
+ sizeof(unsigned char), GFP_KERNEL);
+ if (!f19->button_data_buffer) {
+ dev_err(&fc->dev, "Failed to allocate button data buffer.\n");
+ return -ENOMEM;
+ }
+
+ f19->button_map = kcalloc(f19->button_count,
+ sizeof(unsigned char), GFP_KERNEL);
+ if (!f19->button_map) {
+ dev_err(&fc->dev, "Failed to allocate button map.\n");
+ return -ENOMEM;
+ }
+
+ f19->button_control = kzalloc(sizeof(struct f19_0d_control),
+ GFP_KERNEL);
+ if (!f19->button_control) {
+ dev_err(&fc->dev, "Failed to allocate button_control.\n");
+ return -ENOMEM;
+ }
+
+ f19->button_control->general_control =
+ kzalloc(sizeof(struct f19_0d_control_0), GFP_KERNEL);
+ if (!f19->button_control->general_control) {
+ dev_err(&fc->dev, "Failed to allocate"
+ " f19_0d_control_0.\n");
+ return -ENOMEM;
+ }
+
+ f19->button_control->button_int_enable =
+ kzalloc(f19->button_data_buffer_size *
+ sizeof(struct f19_0d_control_2), GFP_KERNEL);
+ if (!f19->button_control->button_int_enable) {
+ dev_err(&fc->dev, "Failed to allocate f19_0d_control_1.\n");
+ return -ENOMEM;
+ }
+
+ f19->button_control->single_button_participation =
+ kzalloc(f19->button_data_buffer_size *
+ sizeof(struct f19_0d_control_2), GFP_KERNEL);
+ if (!f19->button_control->single_button_participation) {
+ dev_err(&fc->dev, "Failed to allocate"
+ " f19_0d_control_2.\n");
+ return -ENOMEM;
+ }
+
+ f19->button_control->sensor_map =
+ kzalloc(f19->button_count *
+ sizeof(struct f19_0d_control_3_4), GFP_KERNEL);
+ if (!f19->button_control->sensor_map) {
+ dev_err(&fc->dev, "Failed to allocate"
+ " f19_0d_control_3_4.\n");
+ return -ENOMEM;
+ }
+
+ f19->button_control->all_button_sensitivity_adj =
+ kzalloc(sizeof(struct f19_0d_control_5), GFP_KERNEL);
+ if (!f19->button_control->all_button_sensitivity_adj) {
+ dev_err(&fc->dev, "Failed to allocate"
+ " f19_0d_control_5.\n");
+ return -ENOMEM;
+ }
+
+ f19->button_control->all_button_hysteresis_threshold =
+ kzalloc(sizeof(struct f19_0d_control_6), GFP_KERNEL);
+ if (!f19->button_control->all_button_hysteresis_threshold) {
+ dev_err(&fc->dev, "Failed to allocate"
+ " f19_0d_control_6.\n");
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+
+
+static inline void rmi_f19_free_memory(struct rmi_function_container *fc)
+{
+ struct f19_data *f19 = fc->data;
+
+ if (f19) {
+ kfree(f19->button_down);
+ kfree(f19->button_data_buffer);
+ kfree(f19->button_map);
+ if (f19->button_control) {
+ kfree(f19->button_control->general_control);
+ kfree(f19->button_control->button_int_enable);
+ kfree(f19->button_control->single_button_participation);
+ kfree(f19->button_control->sensor_map);
+ kfree(f19->button_control->all_button_sensitivity_adj);
+ kfree(f19->button_control->
+ all_button_hysteresis_threshold);
+ kfree(f19->button_control);
+ }
+ kfree(f19);
+ fc->data = NULL;
+ }
+}
+
+
+static inline int rmi_f19_initialize(struct rmi_function_container *fc)
+{
+ struct rmi_device *rmi_dev = fc->rmi_dev;
+ struct rmi_device_platform_data *pdata;
+ struct f19_data *f19 = fc->data;
+ int i;
+ int rc;
+
+ dev_info(&fc->dev, "Intializing F19 values.");
+
+ /* initial all default values for f19 data here */
+ rc = rmi_read(rmi_dev, fc->fd.command_base_addr,
+ (u8 *)&f19->button_rezero);
+ if (rc < 0) {
+ dev_err(&fc->dev, "Failed to read command register.\n");
+ return rc;
+ }
+ f19->button_rezero = f19->button_rezero & 1;
+
+ pdata = to_rmi_platform_data(rmi_dev);
+ if (pdata) {
+ if (!pdata->button_map) {
+ dev_warn(&fc->dev, "%s - button_map is NULL", __func__);
+ } else if (pdata->button_map->nbuttons != f19->button_count) {
+ dev_warn(&fc->dev,
+ "Platformdata button map size (%d) != number "
+ "of buttons on device (%d) - ignored.\n",
+ pdata->button_map->nbuttons,
+ f19->button_count);
+ } else if (!pdata->button_map->map) {
+ dev_warn(&fc->dev,
+ "Platformdata button map is missing!\n");
+ } else {
+ for (i = 0; i < pdata->button_map->nbuttons; i++)
+ f19->button_map[i] = pdata->button_map->map[i];
+ }
+ }
+
+ rc = rmi_f19_read_control_parameters(rmi_dev,
+ f19->button_control,
+ f19->button_count,
+ f19->button_data_buffer_size,
+ fc->fd.control_base_addr);
+ if (rc < 0) {
+ dev_err(&fc->dev,
+ "Failed to initialize F19 control params.\n");
+ return rc;
+ }
+
+ return 0;
+}
+
+
+
+static inline int rmi_f19_register_device(struct rmi_function_container *fc)
+{
+ struct rmi_device *rmi_dev = fc->rmi_dev;
+ struct input_dev *input_dev;
+ struct f19_data *f19 = fc->data;
+ int i;
+ int rc;
+
+ input_dev = input_allocate_device();
+ if (!input_dev) {
+ dev_err(&fc->dev, "Failed to allocate input device.\n");
+ return -ENOMEM;
+ }
+
+ f19->input = input_dev;
+ snprintf(f19->input_name, MAX_LEN, "%sfn%02x", dev_name(&rmi_dev->dev),
+ fc->fd.function_number);
+ input_dev->name = f19->input_name;
+ snprintf(f19->input_phys, MAX_LEN, "%s/input0", input_dev->name);
+ input_dev->phys = f19->input_phys;
+ input_dev->dev.parent = &rmi_dev->dev;
+ input_set_drvdata(input_dev, f19);
+
+ /* Set up any input events. */
+ set_bit(EV_SYN, input_dev->evbit);
+ set_bit(EV_KEY, input_dev->evbit);
+ /* set bits for each button... */
+ for (i = 0; i < f19->button_count; i++)
+ set_bit(f19->button_map[i], input_dev->keybit);
+ rc = input_register_device(input_dev);
+ if (rc < 0) {
+ dev_err(&fc->dev, "Failed to register input device.\n");
+ goto error_free_device;
+ }
+
+ return 0;
+
+error_free_device:
+ input_free_device(input_dev);
+
+ return rc;
+}
+
+
+static inline int rmi_f19_create_sysfs(struct rmi_function_container *fc)
+{
+ int attr_count = 0;
+ int rc;
+
+ dev_dbg(&fc->dev, "Creating sysfs files.\n");
+ /* Set up sysfs device attributes. */
+ for (attr_count = 0; attr_count < ARRAY_SIZE(attrs); attr_count++) {
+ if (sysfs_create_file
+ (&fc->dev.kobj, &attrs[attr_count].attr) < 0) {
+ dev_err(&fc->dev,
+ "Failed to create sysfs file for %s.",
+ attrs[attr_count].attr.name);
+ rc = -ENODEV;
+ goto err_remove_sysfs;
+ }
+ }
+
+ return 0;
+
+err_remove_sysfs:
+ for (attr_count--; attr_count >= 0; attr_count--)
+ sysfs_remove_file(&fc->dev.kobj,
+ &attrs[attr_count].attr);
+ return rc;
+
+}
+
+
+
+static int rmi_f19_config(struct rmi_function_container *fc)
+{
+ struct f19_data *data;
+ int retval;
+ int ctrl_base_addr;
+ int button_reg;
+
+ data = fc->data;
+
+ ctrl_base_addr = fc->fd.control_base_addr;
+
+ button_reg = (data->button_count / 7) + 1;
+
+ retval = rmi_write_block(fc->rmi_dev, ctrl_base_addr,
+ (u8 *)data->button_control->general_control,
+ sizeof(struct f19_0d_control_0));
+ if (retval < 0) {
+ dev_err(&fc->dev, "%s : Could not write general_control to 0x%x\n",
+ __func__, fc->fd.control_base_addr);
+ return retval;
+ }
+
+ ctrl_base_addr += sizeof(struct f19_0d_control_0);
+ retval = rmi_write_block(fc->rmi_dev, ctrl_base_addr,
+ (u8 *)data->button_control->button_int_enable,
+ sizeof(struct f19_0d_control_1)*(button_reg + 1));
+ if (retval < 0) {
+ dev_err(&fc->dev, "%s : Could not write interrupt_enable_store"
+ " to 0x%x\n", __func__, ctrl_base_addr);
+ return retval;
+ }
+
+ ctrl_base_addr += sizeof(struct f19_0d_control_2)*(button_reg + 1);
+ retval = rmi_write_block(fc->rmi_dev, ctrl_base_addr,
+ (u8 *)data->button_control->single_button_participation,
+ sizeof(struct f19_0d_control_2)*(button_reg + 1));
+ if (retval < 0) {
+ dev_err(&fc->dev,
+ "%s : Could not write interrupt_enable_store to"
+ " 0x%x\n", __func__, ctrl_base_addr);
+ return -EINVAL;
+ }
+
+ ctrl_base_addr = fc->fd.control_base_addr +
+ sizeof(struct f19_0d_control_0) +
+ sizeof(struct f19_0d_control_1)*button_reg +
+ sizeof(struct f19_0d_control_2)*button_reg;
+ retval = rmi_write_block(fc->rmi_dev, ctrl_base_addr,
+ (u8 *)data->button_control->sensor_map,
+ sizeof(struct f19_0d_control_3_4)*data->button_count);
+ if (retval < 0) {
+ dev_err(&fc->dev, "%s : Could not sensor_map_store to 0x%x\n",
+ __func__, ctrl_base_addr);
+ return -EINVAL;
+ }
+ /* write back to the control register */
+ ctrl_base_addr += sizeof(struct f19_0d_control_3_4)*data->button_count;
+ retval = rmi_write_block(fc->rmi_dev, ctrl_base_addr,
+ (u8 *)data->button_control->all_button_sensitivity_adj,
+ sizeof(struct f19_0d_control_5));
+ if (retval < 0) {
+ dev_err(&fc->dev, "%s : Could not sensitivity_adjust_store to"
+ " 0x%x\n", __func__, ctrl_base_addr);
+ return retval;
+ }
+
+ ctrl_base_addr += sizeof(struct f19_0d_control_5);
+ retval = rmi_write_block(fc->rmi_dev, ctrl_base_addr,
+ (u8 *)data->button_control->all_button_sensitivity_adj,
+ sizeof(struct f19_0d_control_6));
+ if (retval < 0) {
+ dev_err(&fc->dev, "%s : Could not write all_button hysteresis "
+ "threshold to 0x%x\n", __func__, ctrl_base_addr);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+
+static int rmi_f19_reset(struct rmi_function_container *fc)
+{
+ /* we do nnothing here */
+ return 0;
+}
+
+
+static void rmi_f19_remove(struct rmi_function_container *fc)
+{
+ struct f19_data *f19 = fc->data;
+ int attr_count = 0;
+
+ for (attr_count = 0; attr_count < ARRAY_SIZE(attrs); attr_count++)
+ sysfs_remove_file(&fc->dev.kobj,
+ &attrs[attr_count].attr);
+
+ input_unregister_device(f19->input);
+
+ rmi_f19_free_memory(fc);
+}
+
+int rmi_f19_attention(struct rmi_function_container *fc, u8 *irq_bits)
+{
+ struct rmi_device *rmi_dev = fc->rmi_dev;
+ struct f19_data *f19 = fc->data;
+ u8 data_base_addr = fc->fd.data_base_addr;
+ int error;
+ int button;
+
+ /* Read the button data. */
+
+ error = rmi_read_block(rmi_dev, data_base_addr, f19->button_data_buffer,
+ f19->button_data_buffer_size);
+ if (error < 0) {
+ dev_err(&fc->dev, "%s: Failed to read button data registers.\n",
+ __func__);
+ return error;
+ }
+
+ /* Generate events for buttons that change state. */
+ for (button = 0; button < f19->button_count;
+ button++) {
+ int button_reg;
+ int button_shift;
+ bool button_status;
+
+ /* determine which data byte the button status is in */
+ button_reg = button / 7;
+ /* bit shift to get button's status */
+ button_shift = button % 8;
+ button_status =
+ ((f19->button_data_buffer[button_reg] >> button_shift)
+ & 0x01) != 0;
+
+ /* if the button state changed from the last time report it
+ * and store the new state */
+ if (button_status != f19->button_down[button]) {
+ dev_dbg(&fc->dev, "%s: Button %d (code %d) -> %d.\n",
+ __func__, button, f19->button_map[button],
+ button_status);
+ /* Generate an event here. */
+ input_report_key(f19->input, f19->button_map[button],
+ button_status);
+ f19->button_down[button] = button_status;
+ }
+ }
+
+ input_sync(f19->input); /* sync after groups of events */
+ return 0;
+}
+
+static struct rmi_function_handler function_handler = {
+ .func = 0x19,
+ .init = rmi_f19_init,
+ .config = rmi_f19_config,
+ .reset = rmi_f19_reset,
+ .attention = rmi_f19_attention,
+ .remove = rmi_f19_remove
+};
+
+static int __init rmi_f19_module_init(void)
+{
+ int error;
+
+ error = rmi_register_function_driver(&function_handler);
+ if (error < 0) {
+ pr_err("%s: register failed!\n", __func__);
+ return error;
+ }
+
+ return 0;
+}
+
+static void rmi_f19_module_exit(void)
+{
+ rmi_unregister_function_driver(&function_handler);
+}
+
+static ssize_t rmi_f19_filter_mode_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct rmi_function_container *fc;
+ struct f19_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data->button_control->general_control->filter_mode);
+
+}
+
+static ssize_t rmi_f19_filter_mode_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct rmi_function_container *fc;
+ struct f19_data *data;
+ unsigned int new_value;
+ int result;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+ if (sscanf(buf, "%u", &new_value) != 1) {
+ dev_err(dev,
+ "%s: Error - filter_mode_store has an "
+ "invalid len.\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ if (new_value < 0 || new_value > 4) {
+ dev_err(dev, "%s: Error - filter_mode_store has an "
+ "invalid value %d.\n",
+ __func__, new_value);
+ return -EINVAL;
+ }
+ data->button_control->general_control->filter_mode = new_value;
+ result = rmi_write_block(fc->rmi_dev, fc->fd.control_base_addr,
+ (u8 *)data->button_control->general_control,
+ sizeof(struct f19_0d_control_0));
+ if (result < 0) {
+ dev_err(dev, "%s : Could not write filter_mode_store to 0x%x\n",
+ __func__, fc->fd.control_base_addr);
+ return result;
+ }
+
+ return count;
+}
+
+static ssize_t rmi_f19_button_usage_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct rmi_function_container *fc;
+ struct f19_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data->button_control->general_control->button_usage);
+
+}
+
+static ssize_t rmi_f19_button_usage_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct rmi_function_container *fc;
+ struct f19_data *data;
+ unsigned int new_value;
+ int result;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+ if (sscanf(buf, "%u", &new_value) != 1) {
+ dev_err(dev,
+ "%s: Error - button_usage_store has an "
+ "invalid len.\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ if (new_value < 0 || new_value > 4) {
+ dev_err(dev, "%s: Error - button_usage_store has an "
+ "invalid value %d.\n",
+ __func__, new_value);
+ return -EINVAL;
+ }
+ data->button_control->general_control->button_usage = new_value;
+ result = rmi_write_block(fc->rmi_dev, fc->fd.control_base_addr,
+ (u8 *)data->button_control->general_control,
+ sizeof(struct f19_0d_control_0));
+ if (result < 0) {
+ dev_err(dev, "%s: Could not write button_usage_store to 0x%x\n",
+ __func__, fc->fd.control_base_addr);
+ return result;
+ }
+
+ return count;
+
+}
+
+static ssize_t rmi_f19_interrupt_enable_button_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct rmi_function_container *fc;
+ struct f19_data *data;
+ int i, len, total_len = 0;
+ char *current_buf = buf;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+ /* loop through each button map value and copy its
+ * string representation into buf */
+ for (i = 0; i < data->button_count; i++) {
+ int button_reg;
+ int button_shift;
+ int interrupt_button;
+
+ button_reg = i / 7;
+ button_shift = i % 8;
+ interrupt_button =
+ ((data->button_control->
+ button_int_enable[button_reg].int_enabled_button >>
+ button_shift) & 0x01);
+
+ /* get next button mapping value and write it to buf */
+ len = snprintf(current_buf, PAGE_SIZE - total_len,
+ "%u ", interrupt_button);
+ /* bump up ptr to next location in buf if the
+ * snprintf was valid. Otherwise issue an error
+ * and return. */
+ if (len > 0) {
+ current_buf += len;
+ total_len += len;
+ } else {
+ dev_err(dev, "%s: Failed to build interrupt button"
+ " buffer, code = %d.\n", __func__, len);
+ return snprintf(buf, PAGE_SIZE, "unknown\n");
+ }
+ }
+ len = snprintf(current_buf, PAGE_SIZE - total_len, "\n");
+ if (len > 0)
+ total_len += len;
+ else
+ dev_warn(dev, "%s: Failed to append carriage return.\n",
+ __func__);
+ return total_len;
+
+}
+
+static ssize_t rmi_f19_interrupt_enable_button_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct rmi_function_container *fc;
+ struct f19_data *data;
+ int i;
+ int button_count = 0;
+ int retval = count;
+ int button_reg = 0;
+ int ctrl_bass_addr;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+ for (i = 0; i < data->button_count && *buf != 0;
+ i++) {
+ int button_shift;
+ int button;
+
+ button_reg = i / 7;
+ button_shift = i % 8;
+ /* get next button mapping value and store and bump up to
+ * point to next item in buf */
+ sscanf(buf, "%u", &button);
+
+ if (button != 0 && button != 1) {
+ dev_err(dev,
+ "%s: Error - interrupt enable button for"
+ " button %d is not a valid value 0x%x.\n",
+ __func__, i, button);
+ return -EINVAL;
+ }
+
+ if (button_shift == 0)
+ data->button_control->button_int_enable[button_reg].
+ int_enabled_button = 0;
+ data->button_control->button_int_enable[button_reg].
+ int_enabled_button |= (button << button_shift);
+ button_count++;
+ /* bump up buf to point to next item to read */
+ while (*buf != 0) {
+ buf++;
+ if (*(buf - 1) == ' ')
+ break;
+ }
+ }
+
+ /* Make sure the button count matches */
+ if (button_count != data->button_count) {
+ dev_err(dev,
+ "%s: Error - interrupt enable button count of %d"
+ " doesn't match device button count of %d.\n",
+ __func__, button_count, data->button_count);
+ return -EINVAL;
+ }
+
+ /* write back to the control register */
+ ctrl_bass_addr = fc->fd.control_base_addr +
+ sizeof(struct f19_0d_control_0);
+ retval = rmi_write_block(fc->rmi_dev, ctrl_bass_addr,
+ (u8 *)data->button_control->button_int_enable,
+ sizeof(struct f19_0d_control_1)*(button_reg + 1));
+ if (retval < 0) {
+ dev_err(dev, "%s : Could not write interrupt_enable_store"
+ " to 0x%x\n", __func__, ctrl_bass_addr);
+ return retval;
+ }
+
+ return count;
+}
+
+static ssize_t rmi_f19_single_button_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct rmi_function_container *fc;
+ struct f19_data *data;
+ int i, len, total_len = 0;
+ char *current_buf = buf;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+ /* loop through each button map value and copy its
+ * string representation into buf */
+ for (i = 0; i < data->button_count; i++) {
+ int button_reg;
+ int button_shift;
+ int single_button;
+
+ button_reg = i / 7;
+ button_shift = i % 8;
+ single_button = ((data->button_control->
+ single_button_participation[button_reg].single_button
+ >> button_shift) & 0x01);
+
+ /* get next button mapping value and write it to buf */
+ len = snprintf(current_buf, PAGE_SIZE - total_len,
+ "%u ", single_button);
+ /* bump up ptr to next location in buf if the
+ * snprintf was valid. Otherwise issue an error
+ * and return. */
+ if (len > 0) {
+ current_buf += len;
+ total_len += len;
+ } else {
+ dev_err(dev, "%s: Failed to build signle button buffer"
+ ", code = %d.\n", __func__, len);
+ return snprintf(buf, PAGE_SIZE, "unknown\n");
+ }
+ }
+ len = snprintf(current_buf, PAGE_SIZE - total_len, "\n");
+ if (len > 0)
+ total_len += len;
+ else
+ dev_warn(dev, "%s: Failed to append carriage return.\n",
+ __func__);
+
+ return total_len;
+
+}
+
+static ssize_t rmi_f19_single_button_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct rmi_function_container *fc;
+ struct f19_data *data;
+ int i;
+ int button_count = 0;
+ int retval = count;
+ int ctrl_bass_addr;
+ int button_reg = 0;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+ for (i = 0; i < data->button_count && *buf != 0;
+ i++) {
+ int button_shift;
+ int button;
+
+ button_reg = i / 7;
+ button_shift = i % 8;
+ /* get next button mapping value and store and bump up to
+ * point to next item in buf */
+ sscanf(buf, "%u", &button);
+
+ if (button != 0 && button != 1) {
+ dev_err(dev,
+ "%s: Error - single button for button %d"
+ " is not a valid value 0x%x.\n",
+ __func__, i, button);
+ return -EINVAL;
+ }
+ if (button_shift == 0)
+ data->button_control->
+ single_button_participation[button_reg].
+ single_button = 0;
+ data->button_control->single_button_participation[button_reg].
+ single_button |= (button << button_shift);
+ button_count++;
+ /* bump up buf to point to next item to read */
+ while (*buf != 0) {
+ buf++;
+ if (*(buf - 1) == ' ')
+ break;
+ }
+ }
+
+ /* Make sure the button count matches */
+ if (button_count != data->button_count) {
+ dev_err(dev,
+ "%s: Error - single button count of %d doesn't match"
+ " device button count of %d.\n", __func__, button_count,
+ data->button_count);
+ return -EINVAL;
+ }
+ /* write back to the control register */
+ ctrl_bass_addr = fc->fd.control_base_addr +
+ sizeof(struct f19_0d_control_0) +
+ sizeof(struct f19_0d_control_2)*(button_reg + 1);
+ retval = rmi_write_block(fc->rmi_dev, ctrl_bass_addr,
+ (u8 *)data->button_control->single_button_participation,
+ sizeof(struct f19_0d_control_2)*(button_reg + 1));
+ if (retval < 0) {
+ dev_err(dev, "%s : Could not write interrupt_enable_store to"
+ " 0x%x\n", __func__, ctrl_bass_addr);
+ return -EINVAL;
+ }
+ return count;
+}
+
+static ssize_t rmi_f19_sensor_map_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct rmi_function_container *fc;
+ struct f19_data *data;
+ int i, len, total_len = 0;
+ char *current_buf = buf;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ for (i = 0; i < data->button_count; i++) {
+ len = snprintf(current_buf, PAGE_SIZE - total_len,
+ "%u ", data->button_control->sensor_map[i].
+ sensor_map_button);
+ /* bump up ptr to next location in buf if the
+ * snprintf was valid. Otherwise issue an error
+ * and return. */
+ if (len > 0) {
+ current_buf += len;
+ total_len += len;
+ } else {
+ dev_err(dev, "%s: Failed to build sensor map buffer, "
+ "code = %d.\n", __func__, len);
+ return snprintf(buf, PAGE_SIZE, "unknown\n");
+ }
+ }
+ len = snprintf(current_buf, PAGE_SIZE - total_len, "\n");
+ if (len > 0)
+ total_len += len;
+ else
+ dev_warn(dev, "%s: Failed to append carriage return.\n",
+ __func__);
+ return total_len;
+
+
+}
+
+static ssize_t rmi_f19_sensor_map_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct rmi_function_container *fc;
+ struct f19_data *data;
+ int sensor_map;
+ int i;
+ int retval = count;
+ int button_count = 0;
+ int ctrl_bass_addr;
+ int button_reg;
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ if (data->button_query.configurable == 0) {
+ dev_err(dev,
+ "%s: Error - sensor map is not configuralbe at"
+ " run-time", __func__);
+ return -EINVAL;
+ }
+
+ for (i = 0; i < data->button_count && *buf != 0; i++) {
+ /* get next button mapping value and store and bump up to
+ * point to next item in buf */
+ sscanf(buf, "%u", &sensor_map);
+
+ /* Make sure the key is a valid key */
+ if (sensor_map < 0 || sensor_map > 127) {
+ dev_err(dev,
+ "%s: Error - sensor map for button %d is"
+ " not a valid value 0x%x.\n",
+ __func__, i, sensor_map);
+ return -EINVAL;
+ }
+
+ data->button_control->sensor_map[i].sensor_map_button =
+ sensor_map;
+ button_count++;
+
+ /* bump up buf to point to next item to read */
+ while (*buf != 0) {
+ buf++;
+ if (*(buf - 1) == ' ')
+ break;
+ }
+ }
+
+ if (button_count != data->button_count) {
+ dev_err(dev,
+ "%s: Error - button map count of %d doesn't match device "
+ "button count of %d.\n", __func__, button_count,
+ data->button_count);
+ return -EINVAL;
+ }
+
+ /* write back to the control register */
+ button_reg = (button_count / 7) + 1;
+ ctrl_bass_addr = fc->fd.control_base_addr +
+ sizeof(struct f19_0d_control_0) +
+ sizeof(struct f19_0d_control_1)*button_reg +
+ sizeof(struct f19_0d_control_2)*button_reg;
+ retval = rmi_write_block(fc->rmi_dev, ctrl_bass_addr,
+ (u8 *)data->button_control->sensor_map,
+ sizeof(struct f19_0d_control_3_4)*button_count);
+ if (retval < 0) {
+ dev_err(dev, "%s : Could not sensor_map_store to 0x%x\n",
+ __func__, ctrl_bass_addr);
+ return -EINVAL;
+ }
+ return count;
+}
+
+static ssize_t rmi_f19_sensitivity_adjust_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct rmi_function_container *fc;
+ struct f19_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n", data->button_control->
+ all_button_sensitivity_adj->sensitivity_adj);
+
+}
+
+static ssize_t rmi_f19_sensitivity_adjust_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct rmi_function_container *fc;
+ struct f19_data *data;
+ unsigned int new_value;
+ int len;
+ int ctrl_bass_addr;
+ int button_reg;
+
+ fc = to_rmi_function_container(dev);
+
+ data = fc->data;
+
+ if (data->button_query.configurable == 0) {
+ dev_err(dev,
+ "%s: Error - sensitivity_adjust is not"
+ " configuralbe at run-time", __func__);
+ return -EINVAL;
+ }
+
+ len = sscanf(buf, "%u", &new_value);
+ if (new_value < 0 || new_value > 31)
+ return -EINVAL;
+
+ data->button_control->all_button_sensitivity_adj->sensitivity_adj =
+ new_value;
+ /* write back to the control register */
+ button_reg = (data->button_count / 7) + 1;
+ ctrl_bass_addr = fc->fd.control_base_addr +
+ sizeof(struct f19_0d_control_0) +
+ sizeof(struct f19_0d_control_1)*button_reg +
+ sizeof(struct f19_0d_control_2)*button_reg +
+ sizeof(struct f19_0d_control_3_4)*data->button_count;
+ len = rmi_write_block(fc->rmi_dev, ctrl_bass_addr,
+ (u8 *)data->button_control->all_button_sensitivity_adj,
+ sizeof(struct f19_0d_control_5));
+ if (len < 0) {
+ dev_err(dev, "%s : Could not sensitivity_adjust_store to"
+ " 0x%x\n", __func__, ctrl_bass_addr);
+ return len;
+ }
+
+ return len;
+}
+
+static ssize_t rmi_f19_hysteresis_threshold_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct rmi_function_container *fc;
+ struct f19_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n", data->button_control->
+ all_button_hysteresis_threshold->hysteresis_threshold);
+
+}
+static ssize_t rmi_f19_hysteresis_threshold_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct rmi_function_container *fc;
+ struct f19_data *data;
+ unsigned int new_value;
+ int len;
+ int ctrl_bass_addr;
+ int button_reg;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+ len = sscanf(buf, "%u", &new_value);
+ if (new_value < 0 || new_value > 15) {
+ dev_err(dev, "%s: Error - hysteresis_threshold_store has an "
+ "invalid value %d.\n",
+ __func__, new_value);
+ return -EINVAL;
+ }
+ data->button_control->all_button_hysteresis_threshold->
+ hysteresis_threshold = new_value;
+ /* write back to the control register */
+ button_reg = (data->button_count / 7) + 1;
+ ctrl_bass_addr = fc->fd.control_base_addr +
+ sizeof(struct f19_0d_control_0) +
+ sizeof(struct f19_0d_control_1)*button_reg +
+ sizeof(struct f19_0d_control_2)*button_reg +
+ sizeof(struct f19_0d_control_3_4)*data->button_count+
+ sizeof(struct f19_0d_control_5);
+ len = rmi_write_block(fc->rmi_dev, ctrl_bass_addr,
+ (u8 *)data->button_control->all_button_sensitivity_adj,
+ sizeof(struct f19_0d_control_6));
+ if (len < 0) {
+ dev_err(dev, "%s : Could not write all_button hysteresis "
+ "threshold to 0x%x\n", __func__, ctrl_bass_addr);
+ return -EINVAL;
+ }
+
+ return count;
+}
+
+static ssize_t rmi_f19_has_hysteresis_threshold_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct rmi_function_container *fc;
+ struct f19_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data->button_query.has_hysteresis_threshold);
+}
+
+static ssize_t rmi_f19_has_sensitivity_adjust_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct rmi_function_container *fc;
+ struct f19_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data->button_query.has_sensitivity_adjust);
+}
+
+static ssize_t rmi_f19_configurable_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct rmi_function_container *fc;
+ struct f19_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data->button_query.configurable);
+}
+
+static ssize_t rmi_f19_rezero_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct rmi_function_container *fc;
+ struct f19_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data->button_rezero);
+
+}
+
+static ssize_t rmi_f19_rezero_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t count)
+{
+ struct rmi_function_container *fc;
+ struct f19_data *data;
+ unsigned int new_value;
+ int len;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+ len = sscanf(buf, "%u", &new_value);
+ if (new_value != 0 && new_value != 1) {
+ dev_err(dev,
+ "%s: Error - rezero is not a "
+ "valid value 0x%x.\n",
+ __func__, new_value);
+ return -EINVAL;
+ }
+ data->button_rezero = new_value & 1;
+ len = rmi_write(fc->rmi_dev, fc->fd.command_base_addr,
+ data->button_rezero);
+
+ if (len < 0) {
+ dev_err(dev, "%s : Could not write rezero to 0x%x\n",
+ __func__, fc->fd.command_base_addr);
+ return -EINVAL;
+ }
+ return count;
+}
+
+static ssize_t rmi_f19_button_count_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct rmi_function_container *fc;
+ struct f19_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data->button_count);
+}
+
+static ssize_t rmi_f19_button_map_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+
+ struct rmi_function_container *fc;
+ struct f19_data *data;
+ int i, len, total_len = 0;
+ char *current_buf = buf;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+ /* loop through each button map value and copy its
+ * string representation into buf */
+ for (i = 0; i < data->button_count; i++) {
+ /* get next button mapping value and write it to buf */
+ len = snprintf(current_buf, PAGE_SIZE - total_len,
+ "%u ", data->button_map[i]);
+ /* bump up ptr to next location in buf if the
+ * snprintf was valid. Otherwise issue an error
+ * and return. */
+ if (len > 0) {
+ current_buf += len;
+ total_len += len;
+ } else {
+ dev_err(dev, "%s: Failed to build button map buffer, "
+ "code = %d.\n", __func__, len);
+ return snprintf(buf, PAGE_SIZE, "unknown\n");
+ }
+ }
+ len = snprintf(current_buf, PAGE_SIZE - total_len, "\n");
+ if (len > 0)
+ total_len += len;
+ else
+ dev_warn(dev, "%s: Failed to append carriage return.\n",
+ __func__);
+ return total_len;
+}
+
+static ssize_t rmi_f19_button_map_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t count)
+{
+ struct rmi_function_container *fc;
+ struct f19_data *data;
+ unsigned int button;
+ int i;
+ int retval = count;
+ int button_count = 0;
+ unsigned char temp_button_map[KEY_MAX];
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ /* Do validation on the button map data passed in. Store button
+ * mappings into a temp buffer and then verify button count and
+ * data prior to clearing out old button mappings and storing the
+ * new ones. */
+ for (i = 0; i < data->button_count && *buf != 0;
+ i++) {
+ /* get next button mapping value and store and bump up to
+ * point to next item in buf */
+ sscanf(buf, "%u", &button);
+
+ /* Make sure the key is a valid key */
+ if (button > KEY_MAX) {
+ dev_err(dev,
+ "%s: Error - button map for button %d is not a"
+ " valid value 0x%x.\n", __func__, i, button);
+ retval = -EINVAL;
+ goto err_ret;
+ }
+
+ temp_button_map[i] = button;
+ button_count++;
+
+ /* bump up buf to point to next item to read */
+ while (*buf != 0) {
+ buf++;
+ if (*(buf - 1) == ' ')
+ break;
+ }
+ }
+
+ /* Make sure the button count matches */
+ if (button_count != data->button_count) {
+ dev_err(dev,
+ "%s: Error - button map count of %d doesn't match device "
+ "button count of %d.\n", __func__, button_count,
+ data->button_count);
+ retval = -EINVAL;
+ goto err_ret;
+ }
+
+ /* Clear the key bits for the old button map. */
+ for (i = 0; i < button_count; i++)
+ clear_bit(data->button_map[i], data->input->keybit);
+
+ /* Switch to the new map. */
+ memcpy(data->button_map, temp_button_map,
+ data->button_count);
+
+ /* Loop through the key map and set the key bit for the new mapping. */
+ for (i = 0; i < button_count; i++)
+ set_bit(data->button_map[i], data->input->keybit);
+
+err_ret:
+ return retval;
+}
+
+module_init(rmi_f19_module_init);
+module_exit(rmi_f19_module_exit);
+
+MODULE_AUTHOR("Vivian Ly <vly@...aptics.com>");
+MODULE_DESCRIPTION("RMI F19 module");
+MODULE_LICENSE("GPL");
+
--
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