[RFC PATCH 8/11] input: RMI4 F54 - analog data reporting
From: Christopher Heiny
Date: Wed Dec 21 2011 - 21:20:53 EST
Signed-off-by: Christopher Heiny <cheiny@xxxxxxxxxxxxx>
Cc: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
Cc: Linus Walleij <linus.walleij@xxxxxxxxxxxxxx>
Cc: Naveen Kumar Gaddipati <naveen.gaddipati@xxxxxxxxxxxxxx>
Cc: Joeri de Gram <j.de.gram@xxxxxxxxx>
---
drivers/input/rmi4/rmi_f54.c | 1506 ++++++++++++++++++++++++++++++++++++++++++
1 files changed, 1506 insertions(+), 0 deletions(-)
diff --git a/drivers/input/rmi4/rmi_f54.c b/drivers/input/rmi4/rmi_f54.c
new file mode 100644
index 0000000..5119184
--- /dev/null
+++ b/drivers/input/rmi4/rmi_f54.c
@@ -0,0 +1,1506 @@
+
+/*
+ * 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/hrtimer.h>
+#include <linux/kernel.h>
+#include <linux/rmi.h>
+#include <linux/slab.h>
+#include <linux/version.h>
+#include <linux/delay.h>
+#include "rmi_driver.h"
+/* Set this to 1 for raw hex dump of returned data. */
+#define RAW_HEX 0
+/* Set this to 1 for human readable dump of returned data. */
+#define HUMAN_READABLE 0
+/* The watchdog timer can be useful when debugging certain firmware related
+ * issues.
+ */
+#define F54_WATCHDOG 1
+
+#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 32)
+#define KERNEL_VERSION_ABOVE_2_6_32 1
+#endif
+
+/* define fn $54 commands */
+#define GET_REPORT 1
+#define FORCE_CAL 2
+
+/* status */
+#define BUSY 1
+#define IDLE 0
+
+/* Offsets for data */
+#define RMI_F54_REPORT_DATA_OFFSET 3
+#define RMI_F54_FIFO_OFFSET 1
+#define RMI_F54_NUM_TX_OFFSET 1
+#define RMI_F54_NUM_RX_OFFSET 0
+
+/* Fixed sizes of reports */
+#define RMI_54_FULL_RAW_CAP_MIN_MAX_SIZE 4
+#define RMI_54_HIGH_RESISTANCE_SIZE 6
+
+/* definitions for F54 Query Registers in ultra-portable unionstruct form */
+struct f54_ad_query {
+ /* query 0 */
+ u8 number_of_receiver_electrodes;
+
+ /* query 1 */
+ u8 number_of_transmitter_electrodes;
+
+ union {
+ struct {
+ /* query2 */
+ u8 f54_ad_query2_b0__1:2;
+ u8 has_baseline:1;
+ u8 has_image8:1;
+ u8 f54_ad_query2_b4__5:2;
+ u8 has_image16:1;
+ u8 f54_ad_query2_b7:1;
+ };
+ u8 f54_ad_query2;
+ };
+
+ /* query 3.0 and 3.1 */
+ u16 clock_rate;
+
+ /* query 4 */
+ u8 touch_controller_family;
+
+ /* query 5 */
+ union {
+ struct {
+ u8 has_pixel_touch_threshold_adjustment:1;
+ u8 f54_ad_query5_b1__7:7;
+ };
+ u8 f54_ad_query5;
+ };
+
+ /* query 6 */
+ union {
+ struct {
+ u8 has_sensor_assignment:1;
+ u8 has_interference_metric:1;
+ u8 has_sense_frequency_control:1;
+ u8 has_firmware_noise_mitigation:1;
+ u8 f54_ad_query6_b4:1;
+ u8 has_two_byte_report_rate:1;
+ u8 has_one_byte_report_rate:1;
+ u8 has_relaxation_control:1;
+ };
+ u8 f54_ad_query6;
+ };
+
+ /* query 7 */
+ union {
+ struct {
+ u8 curve_compensation_mode:2;
+ u8 f54_ad_query7_b2__7:6;
+ };
+ u8 f54_ad_query7;
+ };
+
+ /* query 8 */
+ union {
+ struct {
+ u8 f54_ad_query2_b0:1;
+ u8 has_iir_filter:1;
+ u8 has_cmn_removal:1;
+ u8 has_cmn_maximum:1;
+ u8 has_pixel_threshold_hysteresis:1;
+ u8 has_edge_compensation:1;
+ u8 has_perf_frequency_noisecontrol:1;
+ u8 f54_ad_query8_b7:1;
+ };
+ u8 f54_ad_query8;
+ };
+
+ u8 f54_ad_query9;
+ u8 f54_ad_query10;
+ u8 f54_ad_query11;
+
+ /* query 12 */
+ union {
+ struct {
+ u8 number_of_sensing_frequencies:4;
+ u8 f54_ad_query12_b4__7:4;
+ };
+ u8 f54_ad_query12;
+ };
+};
+
+/* define report types */
+enum f54_report_types {
+ /* The numbering should follow automatically, here for clarity */
+ F54_8BIT_IMAGE = 1,
+ F54_16BIT_IMAGE = 2,
+ F54_RAW_16BIT_IMAGE = 3,
+ F54_HIGH_RESISTANCE = 4,
+ F54_TX_TO_TX_SHORT = 5,
+ F54_RX_TO_RX1 = 7,
+ F54_TRUE_BASELINE = 9,
+ F54_FULL_RAW_CAP_MIN_MAX = 13,
+ F54_RX_OPENS1 = 14,
+ F54_TX_OPEN = 15,
+ F54_TX_TO_GROUND = 16,
+ F54_RX_TO_RX2 = 17,
+ F54_RX_OPENS2 = 18,
+ F54_FULL_RAW_CAP = 19,
+ F54_FULL_RAW_CAP_RX_COUPLING_COMP = 20
+};
+
+/* data specific to fn $54 that needs to be kept around */
+struct rmi_fn_54_data {
+ struct f54_ad_query query;
+ u8 cmd;
+ enum f54_report_types report_type;
+ u16 fifoindex;
+ signed char status;
+ bool no_auto_cal;
+ /*
+ * May need to do something to make sure this reflects what is currently
+ * in data.
+ */
+ unsigned int report_size;
+ unsigned char *report_data;
+ unsigned int bufsize;
+ struct mutex data_mutex;
+ struct lock_class_key data_key;
+ struct mutex status_mutex;
+ struct lock_class_key status_key;
+#if F54_WATCHDOG
+ struct hrtimer watchdog;
+#endif
+ struct rmi_function_container *fc;
+ struct work_struct work;
+};
+
+/* sysfs functions */
+static ssize_t rmi_fn_54_report_type_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
+static ssize_t rmi_fn_54_report_type_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count);
+
+static ssize_t rmi_fn_54_get_report_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count);
+
+static ssize_t rmi_fn_54_force_cal_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count);
+
+static ssize_t rmi_fn_54_status_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
+
+static ssize_t rmi_fn_54_status_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count);
+
+#ifdef KERNEL_VERSION_ABOVE_2_6_32
+static ssize_t rmi_fn_54_data_read(struct file *data_file, struct kobject *kobj,
+#else
+static ssize_t rmi_fn_54_data_read(struct kobject *kobj,
+#endif
+ struct bin_attribute *attributes,
+ char *buf, loff_t pos, size_t count);
+
+static ssize_t rmi_fn_54_num_rx_electrodes_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
+static ssize_t rmi_fn_54_num_tx_electrodes_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
+static ssize_t rmi_fn_54_has_image16_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
+static ssize_t rmi_fn_54_has_image8_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
+static ssize_t rmi_fn_54_has_baseline_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
+static ssize_t rmi_fn_54_clock_rate_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
+
+static ssize_t rmi_fn_54_touch_controller_family_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
+
+static ssize_t rmi_fn_54_has_pixel_touch_threshold_adjustment_show(
+ struct device *dev, struct device_attribute *attr, char *buf);
+
+static ssize_t rmi_fn_54_has_sensor_assignment_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
+static ssize_t rmi_fn_54_has_interference_metric_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
+static ssize_t rmi_fn_54_has_sense_frequency_control_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
+static ssize_t rmi_fn_54_has_firmware_noise_mitigation_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
+static ssize_t rmi_fn_54_has_two_byte_report_rate_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
+static ssize_t rmi_fn_54_has_one_byte_report_rate_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
+static ssize_t rmi_fn_54_has_relaxation_control_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
+static ssize_t rmi_fn_54_curve_compensation_mode_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
+static ssize_t rmi_fn_54_has_iir_filter_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
+static ssize_t rmi_fn_54_has_cmn_removal_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
+static ssize_t rmi_fn_54_has_cmn_maximum_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
+static ssize_t rmi_fn_54_has_pixel_threshold_hysteresis_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
+static ssize_t rmi_fn_54_has_edge_compensation_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
+static ssize_t rmi_fn_54_has_perf_frequency_noisecontrol_show(
+ struct device *dev, struct device_attribute *attr, char *buf);
+
+static ssize_t rmi_fn_54_number_of_sensing_frequencies_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
+static ssize_t rmi_fn_54_no_auto_cal_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
+static ssize_t rmi_fn_54_no_auto_cal_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count);
+
+static ssize_t rmi_fn_54_fifoindex_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+
+static ssize_t rmi_fn_54_fifoindex_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count);
+
+
+static inline int rmi_f54_alloc_memory(struct rmi_function_container *fc);
+
+static inline void rmi_f54_free_memory(struct rmi_function_container *fc);
+
+static inline int rmi_f54_initialize(struct rmi_function_container *fc);
+
+static int rmi_f54_config(struct rmi_function_container *fc);
+
+static int rmi_f54_reset(struct rmi_function_container *fc);
+
+static inline int rmi_f54_create_sysfs(struct rmi_function_container *fc);
+
+
+static struct device_attribute attrs[] = {
+ __ATTR(report_type, RMI_RW_ATTR,
+ rmi_fn_54_report_type_show, rmi_fn_54_report_type_store),
+ __ATTR(get_report, RMI_WO_ATTR,
+ rmi_show_error, rmi_fn_54_get_report_store),
+ __ATTR(force_cal, RMI_WO_ATTR,
+ rmi_show_error, rmi_fn_54_force_cal_store),
+ __ATTR(status, RMI_RW_ATTR,
+ rmi_fn_54_status_show, rmi_fn_54_status_store),
+ __ATTR(num_rx_electrodes, RMI_RO_ATTR,
+ rmi_fn_54_num_rx_electrodes_show, rmi_store_error),
+ __ATTR(num_tx_electrodes, RMI_RO_ATTR,
+ rmi_fn_54_num_tx_electrodes_show, rmi_store_error),
+ __ATTR(has_image16, RMI_RO_ATTR,
+ rmi_fn_54_has_image16_show, rmi_store_error),
+ __ATTR(has_image8, RMI_RO_ATTR,
+ rmi_fn_54_has_image8_show, rmi_store_error),
+ __ATTR(has_baseline, RMI_RO_ATTR,
+ rmi_fn_54_has_baseline_show, rmi_store_error),
+ __ATTR(clock_rate, RMI_RO_ATTR,
+ rmi_fn_54_clock_rate_show, rmi_store_error),
+ __ATTR(touch_controller_family, RMI_RO_ATTR,
+ rmi_fn_54_touch_controller_family_show, rmi_store_error),
+ __ATTR(has_pixel_touch_threshold_adjustment, RMI_RO_ATTR,
+ rmi_fn_54_has_pixel_touch_threshold_adjustment_show
+ , rmi_store_error),
+ __ATTR(has_sensor_assignment, RMI_RO_ATTR,
+ rmi_fn_54_has_sensor_assignment_show, rmi_store_error),
+ __ATTR(has_interference_metric, RMI_RO_ATTR,
+ rmi_fn_54_has_interference_metric_show, rmi_store_error),
+ __ATTR(has_sense_frequency_control, RMI_RO_ATTR,
+ rmi_fn_54_has_sense_frequency_control_show, rmi_store_error),
+ __ATTR(has_firmware_noise_mitigation, RMI_RO_ATTR,
+ rmi_fn_54_has_firmware_noise_mitigation_show, rmi_store_error),
+ __ATTR(has_two_byte_report_rate, RMI_RO_ATTR,
+ rmi_fn_54_has_two_byte_report_rate_show, rmi_store_error),
+ __ATTR(has_one_byte_report_rate, RMI_RO_ATTR,
+ rmi_fn_54_has_one_byte_report_rate_show, rmi_store_error),
+ __ATTR(has_relaxation_control, RMI_RO_ATTR,
+ rmi_fn_54_has_relaxation_control_show, rmi_store_error),
+ __ATTR(curve_compensation_mode, RMI_RO_ATTR,
+ rmi_fn_54_curve_compensation_mode_show, rmi_store_error),
+ __ATTR(has_iir_filter, RMI_RO_ATTR,
+ rmi_fn_54_has_iir_filter_show, rmi_store_error),
+ __ATTR(has_cmn_removal, RMI_RO_ATTR,
+ rmi_fn_54_has_cmn_removal_show, rmi_store_error),
+ __ATTR(has_cmn_maximum, RMI_RO_ATTR,
+ rmi_fn_54_has_cmn_maximum_show, rmi_store_error),
+ __ATTR(has_pixel_threshold_hysteresis, RMI_RO_ATTR,
+ rmi_fn_54_has_pixel_threshold_hysteresis_show, rmi_store_error),
+ __ATTR(has_edge_compensation, RMI_RO_ATTR,
+ rmi_fn_54_has_edge_compensation_show, rmi_store_error),
+ __ATTR(has_perf_frequency_noisecontrol, RMI_RO_ATTR,
+ rmi_fn_54_has_perf_frequency_noisecontrol_show, rmi_store_error),
+ __ATTR(number_of_sensing_frequencies, RMI_RO_ATTR,
+ rmi_fn_54_number_of_sensing_frequencies_show, rmi_store_error),
+ __ATTR(no_auto_cal, RMI_RW_ATTR,
+ rmi_fn_54_no_auto_cal_show, rmi_fn_54_no_auto_cal_store),
+ __ATTR(fifoindex, RMI_RW_ATTR,
+ rmi_fn_54_fifoindex_show, rmi_fn_54_fifoindex_store),
+};
+
+struct bin_attribute dev_rep_data = {
+ .attr = {
+ .name = "rep_data",
+ .mode = RMI_RO_ATTR},
+ .size = 0,
+ .read = rmi_fn_54_data_read,
+};
+
+#if F54_WATCHDOG
+static enum hrtimer_restart clear_status(struct hrtimer *timer);
+
+static void clear_status_worker(struct work_struct *work);
+#endif
+
+
+
+static int rmi_f54_init(struct rmi_function_container *fc)
+{
+ int retval = 0;
+
+ dev_info(&fc->dev, "Intializing F54.");
+
+ retval = rmi_f54_alloc_memory(fc);
+ if (retval < 0)
+ goto error_exit;
+
+ retval = rmi_f54_initialize(fc);
+ if (retval < 0)
+ goto error_exit;
+
+ retval = rmi_f54_create_sysfs(fc);
+ if (retval < 0)
+ goto error_exit;
+
+ return retval;
+
+error_exit:
+ rmi_f54_free_memory(fc);
+
+ return retval;
+}
+
+
+
+static inline int rmi_f54_alloc_memory(struct rmi_function_container *fc)
+{
+ struct rmi_fn_54_data *f54;
+
+ f54 = kzalloc(sizeof(struct rmi_fn_54_data), GFP_KERNEL);
+ if (!f54) {
+ dev_err(&fc->dev, "Failed to allocate rmi_fn_54_data.\n");
+ return -ENOMEM;
+ }
+ fc->data = f54;
+
+ return 0;
+}
+
+
+static inline void rmi_f54_free_memory(struct rmi_function_container *fc)
+{
+ struct rmi_fn_54_data *f54 = fc->data;
+
+ if (f54) {
+ kfree(f54->report_data);
+ kfree(f54);
+ fc->data = NULL;
+ }
+}
+
+
+static inline int rmi_f54_initialize(struct rmi_function_container *fc)
+{
+ struct rmi_fn_54_data *instance_data = fc->data;
+ int retval = 0;
+
+ instance_data->fc = fc;
+
+#if F54_WATCHDOG
+ /* Set up watchdog timer to catch unanswered get_report commands */
+ hrtimer_init(&instance_data->watchdog, CLOCK_MONOTONIC,
+ HRTIMER_MODE_REL);
+ instance_data->watchdog.function = clear_status;
+
+ /* work function to do unlocking */
+ INIT_WORK(&instance_data->work, clear_status_worker);
+#endif
+
+ /* Read F54 Query Data */
+ retval = rmi_read_block(fc->rmi_dev, fc->fd.query_base_addr,
+ (u8 *)&instance_data->query, sizeof(instance_data->query));
+ if (retval < 0) {
+ dev_err(&fc->dev, "Could not read query registers"
+ " from 0x%04x\n", fc->fd.query_base_addr);
+ return retval;
+ }
+
+ __mutex_init(&instance_data->data_mutex, "data_mutex",
+ &instance_data->data_key);
+
+ __mutex_init(&instance_data->status_mutex, "status_mutex",
+ &instance_data->status_key);
+
+ instance_data->status = IDLE;
+
+ return 0;
+}
+
+
+static inline int rmi_f54_create_sysfs(struct rmi_function_container *fc)
+{
+ int attr_count = 0;
+ int rc;
+
+ dev_dbg(&fc->dev, "Creating sysfs files.");
+
+ /* Binary sysfs file to report the data back */
+ rc = sysfs_create_bin_file(&fc->dev.kobj, &dev_rep_data);
+ if (rc < 0) {
+ dev_err(&fc->dev, "Failed to create sysfs file for F54 data "
+ "(error = %d).\n", rc);
+ return -ENODEV;
+ }
+
+ /* 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:
+ sysfs_remove_bin_file(&fc->dev.kobj, &dev_rep_data);
+
+ for (attr_count--; attr_count >= 0; attr_count--)
+ sysfs_remove_file(&fc->dev.kobj,
+ &attrs[attr_count].attr);
+
+ return rc;
+}
+
+
+static int rmi_f54_config(struct rmi_function_container *fc)
+{
+ /*we shouldn't do anything here.
+ * (reset should write a 1 to a "beenreset" sysfs file)
+ */
+ return 0;
+}
+
+
+
+static int rmi_f54_reset(struct rmi_function_container *fc)
+{
+ struct rmi_fn_54_data *data = fc->data;
+ struct rmi_driver *driver = fc->rmi_dev->driver;
+
+#if F54_WATCHDOG
+ hrtimer_cancel(&data->watchdog);
+#endif
+
+ mutex_lock(&data->status_mutex);
+ if (driver->restore_irq_mask) {
+ dev_dbg(&fc->dev, "Restoring interupts!\n");
+ driver->restore_irq_mask(fc->rmi_dev);
+ } else {
+ dev_err(&fc->dev, "No way to restore interrupts!\n");
+ }
+ data->status = -ECONNRESET;
+ mutex_unlock(&data->status_mutex);
+
+ return 0;
+}
+
+
+
+static void rmi_f54_remove(struct rmi_function_container *fc)
+{
+ struct rmi_fn_54_data *data = fc->data;
+ int attr_count = 0;
+
+ dev_info(&fc->dev, "Removing F54.");
+
+ #if F54_WATCHDOG
+ /* Stop timer */
+ hrtimer_cancel(&data->watchdog);
+ #endif
+
+ for (attr_count = 0; attr_count < ARRAY_SIZE(attrs); attr_count++)
+ sysfs_remove_file(&fc->dev.kobj, &attrs[attr_count].attr);
+
+ sysfs_remove_bin_file(&fc->dev.kobj, &dev_rep_data);
+
+ rmi_f54_free_memory(fc);
+}
+
+
+static void set_report_size(struct rmi_fn_54_data *data)
+{
+ u8 rx = data->query.number_of_receiver_electrodes;
+ u8 tx = data->query.number_of_transmitter_electrodes;
+ switch (data->report_type) {
+ case F54_8BIT_IMAGE:
+ data->report_size = rx * tx;
+ break;
+ case F54_16BIT_IMAGE:
+ case F54_RAW_16BIT_IMAGE:
+ case F54_TRUE_BASELINE:
+ case F54_FULL_RAW_CAP:
+ case F54_FULL_RAW_CAP_RX_COUPLING_COMP:
+ data->report_size = 2 * rx * tx;
+ break;
+ case F54_HIGH_RESISTANCE:
+ data->report_size = RMI_54_HIGH_RESISTANCE_SIZE;
+ break;
+ case F54_FULL_RAW_CAP_MIN_MAX:
+ data->report_size = RMI_54_FULL_RAW_CAP_MIN_MAX_SIZE;
+ break;
+ case F54_TX_TO_TX_SHORT:
+ case F54_TX_OPEN:
+ case F54_TX_TO_GROUND:
+ data->report_size = (tx + 7) / 8;
+ break;
+ case F54_RX_TO_RX1:
+ case F54_RX_OPENS1:
+ if (rx < tx)
+ data->report_size = 2 * rx * rx;
+ else
+ data->report_size = 2 * rx * tx;
+ break;
+ case F54_RX_TO_RX2:
+ case F54_RX_OPENS2:
+ if (rx <= tx)
+ data->report_size = 0;
+ else
+ data->report_size = 2 * rx * (rx - tx);
+ break;
+ default:
+ data->report_size = 0;
+ }
+}
+
+int rmi_f54_attention(struct rmi_function_container *fc, u8 *irq_bits)
+{
+ struct rmi_driver *driver = fc->rmi_dev->driver;
+ char fifo[2];
+ struct rmi_fn_54_data *data = fc->data;
+ int error = 0;
+
+ set_report_size(data);
+ if (data->report_size == 0) {
+ dev_err(&fc->dev, "Invalid report type set in %s. "
+ "This should never happen.\n", __func__);
+ error = -EINVAL;
+ goto error_exit;
+ }
+ /*
+ * We need to ensure the buffer is big enough. A Buffer size of 0 means
+ * that the buffer has not been allocated.
+ */
+ if (data->bufsize < data->report_size) {
+ mutex_lock(&data->data_mutex);
+ if (data->bufsize > 0)
+ kfree(data->report_data);
+ data->report_data = kzalloc(data->report_size, GFP_KERNEL);
+ if (!data->report_data) {
+ dev_err(&fc->dev, "Failed to allocate report_data.\n");
+ error = -ENOMEM;
+ data->bufsize = 0;
+ mutex_unlock(&data->data_mutex);
+ goto error_exit;
+ }
+ data->bufsize = data->report_size;
+ mutex_unlock(&data->data_mutex);
+ }
+ dev_vdbg(&fc->dev, "F54 Interrupt handler is running.\nSize: %d\n",
+ data->report_size);
+ /* Write 0 to fifohi and fifolo. */
+ fifo[0] = 0;
+ fifo[1] = 0;
+ error = rmi_write_block(fc->rmi_dev, fc->fd.data_base_addr
+ + RMI_F54_FIFO_OFFSET, fifo, sizeof(fifo));
+ if (error < 0)
+ dev_err(&fc->dev, "Failed to write fifo to zero!\n");
+ else
+ error = rmi_read_block(fc->rmi_dev,
+ fc->fd.data_base_addr + RMI_F54_REPORT_DATA_OFFSET,
+ data->report_data, data->report_size);
+ if (error < 0)
+ dev_err(&fc->dev, "F54 data read failed. Code: %d.\n", error);
+ else if (error != data->report_size) {
+ error = -EINVAL;
+ goto error_exit;
+ }
+#if RAW_HEX
+ int l;
+ /* Debugging: Print out the file in hex. */
+ pr_info("Report data (raw hex):\n");
+ for (l = 0; l < data->report_size; l += 2) {
+ pr_info("%03d: 0x%02x%02x\n", l/2,
+ data->report_data[l+1], data->report_data[l]);
+ }
+#endif
+#if HUMAN_READABLE
+ /* Debugging: Print out file in human understandable image */
+ switch (data->report_type) {
+ case F54_16BIT_IMAGE:
+ case F54_RAW_16BIT_IMAGE:
+ case F54_TRUE_BASELINE:
+ case F54_FULL_RAW_CAP:
+ case F54_FULL_RAW_CAP_RX_COUPLING_COMP:
+ pr_info("Report data (Image):\n");
+ int i, j, k;
+ char c[2];
+ short s;
+ k = 0;
+ for (i = 0; i < data->query.number_of_transmitter_electrodes;
+ i++) {
+ for (j = 0; j <
+ data->query.number_of_receiver_electrodes; j++) {
+ c[0] = data->report_data[k];
+ c[1] = data->report_data[k+1];
+ memcpy(&s, &c, 2);
+ if (s < -64)
+ printk(".");
+ else if (s < 0)
+ printk("-");
+ else if (s > 64)
+ printk("*");
+ else if (s > 0)
+ printk("+");
+ else
+ printk("0");
+ k += 2;
+ }
+ pr_info("\n");
+ }
+ pr_info("EOF\n");
+ break;
+ default:
+ pr_info("Report type %d debug image not supported",
+ data->report_type);
+ }
+#endif
+ error = IDLE;
+error_exit:
+ mutex_lock(&data->status_mutex);
+ /* Turn back on other interupts, if it
+ * appears that we turned them off. */
+ if (driver->restore_irq_mask) {
+ dev_dbg(&fc->dev, "Restoring interupts!\n");
+ driver->restore_irq_mask(fc->rmi_dev);
+ } else {
+ dev_err(&fc->dev, "No way to restore interrupts!\n");
+ }
+ data->status = error;
+ mutex_unlock(&data->status_mutex);
+ return data->status;
+}
+
+
+#if F54_WATCHDOG
+static void clear_status_worker(struct work_struct *work)
+{
+ struct rmi_fn_54_data *data = container_of(work,
+ struct rmi_fn_54_data, work);
+ struct rmi_function_container *fc = data->fc;
+ struct rmi_driver *driver = fc->rmi_dev->driver;
+ char command;
+ int result;
+
+ mutex_lock(&data->status_mutex);
+ if (data->status == BUSY) {
+ pr_debug("F54 Timout Occured: Determining status.\n");
+ result = rmi_read_block(fc->rmi_dev, fc->fd.command_base_addr,
+ &command, 1);
+ if (result < 0) {
+ dev_err(&fc->dev, "Could not read get_report register "
+ "from 0x%04x\n", fc->fd.command_base_addr);
+ data->status = -ETIMEDOUT;
+ } else {
+ if (command & GET_REPORT) {
+ dev_warn(&fc->dev, "Report type unsupported!");
+ data->status = -EINVAL;
+ } else {
+ data->status = -ETIMEDOUT;
+ }
+ }
+ if (driver->restore_irq_mask) {
+ dev_dbg(&fc->dev, "Restoring interupts!\n");
+ driver->restore_irq_mask(fc->rmi_dev);
+ } else {
+ dev_err(&fc->dev, "No way to restore interrupts!\n");
+ }
+ }
+ mutex_unlock(&data->status_mutex);
+}
+
+static enum hrtimer_restart clear_status(struct hrtimer *timer)
+{
+ struct rmi_fn_54_data *data = container_of(timer,
+ struct rmi_fn_54_data, watchdog);
+ schedule_work(&(data->work));
+ return HRTIMER_NORESTART;
+}
+#endif
+
+/* Check if report_type is valid */
+static bool is_report_type_valid(enum f54_report_types reptype)
+{
+ /* Basic checks on report_type to ensure we write a valid type
+ * to the sensor.
+ * TODO: Check Query3 to see if some specific reports are
+ * available. This is currently listed as a reserved register.
+ */
+ switch (reptype) {
+ case F54_8BIT_IMAGE:
+ case F54_16BIT_IMAGE:
+ case F54_RAW_16BIT_IMAGE:
+ case F54_HIGH_RESISTANCE:
+ case F54_TX_TO_TX_SHORT:
+ case F54_RX_TO_RX1:
+ case F54_TRUE_BASELINE:
+ case F54_FULL_RAW_CAP_MIN_MAX:
+ case F54_RX_OPENS1:
+ case F54_TX_OPEN:
+ case F54_TX_TO_GROUND:
+ case F54_RX_TO_RX2:
+ case F54_RX_OPENS2:
+ case F54_FULL_RAW_CAP:
+ case F54_FULL_RAW_CAP_RX_COUPLING_COMP:
+ return true;
+ break;
+ default:
+ return false;
+ }
+}
+
+/* SYSFS file show/store functions */
+static ssize_t rmi_fn_54_report_type_show(struct device *dev,
+ struct device_attribute *attr, char *buf) {
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *instance_data;
+
+ fc = to_rmi_function_container(dev);
+ instance_data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n", instance_data->report_type);
+}
+
+static ssize_t rmi_fn_54_report_type_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count) {
+ int result;
+ unsigned long val;
+ unsigned char data;
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *instance_data;
+ fc = to_rmi_function_container(dev);
+ instance_data = fc->data;
+
+ /* need to convert the string data to an actual value */
+ result = strict_strtoul(buf, 10, &val);
+ if (result)
+ return result;
+ if (!is_report_type_valid(val)) {
+ dev_err(dev, "%s : Report type %d is invalid.\n",
+ __func__, (u8) val);
+ return -EINVAL;
+ }
+ mutex_lock(&instance_data->status_mutex);
+ if (instance_data->status != BUSY) {
+ instance_data->report_type = (enum f54_report_types)val;
+ data = (char)val;
+ /* Write the Report Type back to the first Block
+ * Data registers (F54_AD_Data0). */
+ result =
+ rmi_write_block(fc->rmi_dev, fc->fd.data_base_addr,
+ &data, 1);
+ mutex_unlock(&instance_data->status_mutex);
+ if (result < 0) {
+ dev_err(dev, "%s : Could not write report type to"
+ " 0x%x\n", __func__, fc->fd.data_base_addr);
+ return result;
+ }
+ return count;
+ } else {
+ dev_err(dev, "%s : Report type cannot be changed in the middle"
+ " of command.\n", __func__);
+ mutex_unlock(&instance_data->status_mutex);
+ return -EINVAL;
+ }
+}
+
+static ssize_t rmi_fn_54_get_report_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count) {
+ unsigned long val;
+ int error, result;
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *instance_data;
+ struct rmi_driver *driver;
+ u8 command;
+ fc = to_rmi_function_container(dev);
+ instance_data = fc->data;
+ driver = fc->rmi_dev->driver;
+
+ /* need to convert the string data to an actual value */
+ error = strict_strtoul(buf, 10, &val);
+ if (error)
+ return error;
+ /* Do nothing if not set to 1. This prevents accidental commands. */
+ if (val != 1)
+ return count;
+ command = (unsigned char)GET_REPORT;
+ /* Basic checks on report_type to ensure we write a valid type
+ * to the sensor.
+ * TODO: Check Query3 to see if some specific reports are
+ * available. This is currently listed as a reserved register.
+ */
+ if (!is_report_type_valid(instance_data->report_type)) {
+ dev_err(dev, "%s : Report type %d is invalid.\n",
+ __func__, instance_data->report_type);
+ return -EINVAL;
+ }
+ mutex_lock(&instance_data->status_mutex);
+ if (instance_data->status != IDLE) {
+ if (instance_data->status != BUSY) {
+ dev_err(dev, "F54 status is in an abnormal state: 0x%x",
+ instance_data->status);
+ }
+ mutex_unlock(&instance_data->status_mutex);
+ return count;
+ }
+ /* Store interrupts */
+ /* Do not exit if we fail to turn off interupts. We are likely
+ * to still get useful data. The report data can, however, be
+ * corrupted, and there may be unexpected behavior.
+ */
+ dev_dbg(dev, "Storing and overriding interupts\n");
+ if (driver->store_irq_mask)
+ driver->store_irq_mask(fc->rmi_dev,
+ fc->irq_mask);
+ else
+ dev_err(dev, "No way to store interupts!\n");
+ instance_data->status = BUSY;
+
+ /* small delay to avoid race condition in firmare. This value is a bit
+ * higher than absolutely necessary. Should be removed once issue is
+ * resolved in firmware. */
+
+ mdelay(2);
+
+ /* Write the command to the command register */
+ result = rmi_write_block(fc->rmi_dev, fc->fd.command_base_addr,
+ &command, 1);
+ mutex_unlock(&instance_data->status_mutex);
+ if (result < 0) {
+ dev_err(dev, "%s : Could not write command to 0x%x\n",
+ __func__, fc->fd.command_base_addr);
+ return result;
+ }
+#if F54_WATCHDOG
+ /* start watchdog timer */
+ hrtimer_start(&instance_data->watchdog, ktime_set(1, 0),
+ HRTIMER_MODE_REL);
+#endif
+ return count;
+}
+
+
+static ssize_t rmi_fn_54_force_cal_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count) {
+ unsigned long val;
+ int error, result;
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *instance_data;
+ struct rmi_driver *driver;
+ u8 command;
+
+ fc = to_rmi_function_container(dev);
+ instance_data = fc->data;
+ driver = fc->rmi_dev->driver;
+
+ /* need to convert the string data to an actual value */
+ error = strict_strtoul(buf, 10, &val);
+ if (error)
+ return error;
+ /* Do nothing if not set to 1. This prevents accidental commands. */
+ if (val != 1)
+ return count;
+
+ command = (unsigned char)FORCE_CAL;
+
+ if (instance_data->status == BUSY)
+ return -EBUSY;
+ /* Write the command to the command register */
+ result = rmi_write_block(fc->rmi_dev, fc->fd.command_base_addr,
+ &command, 1);
+ if (result < 0) {
+ dev_err(dev, "%s : Could not write command to 0x%x\n",
+ __func__, fc->fd.command_base_addr);
+ return result;
+ }
+ return count;
+}
+
+static ssize_t rmi_fn_54_status_show(struct device *dev,
+ struct device_attribute *attr, char *buf) {
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *instance_data;
+
+ fc = to_rmi_function_container(dev);
+ instance_data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%d\n", instance_data->status);
+}
+
+
+
+static ssize_t rmi_fn_54_status_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count) {
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *instance_data;
+
+ fc = to_rmi_function_container(dev);
+ instance_data = fc->data;
+
+ mutex_lock(&instance_data->status_mutex);
+ /* any write to status resets it */
+ instance_data->status = 0;
+ mutex_unlock(&instance_data->status_mutex);
+
+ return 0;
+}
+
+
+static ssize_t rmi_fn_54_num_rx_electrodes_show(struct device *dev,
+ struct device_attribute *attr, char *buf) {
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data->query.number_of_receiver_electrodes);
+}
+
+static ssize_t rmi_fn_54_num_tx_electrodes_show(struct device *dev,
+ struct device_attribute *attr, char *buf) {
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data->query.number_of_transmitter_electrodes);
+}
+
+static ssize_t rmi_fn_54_has_image16_show(struct device *dev,
+ struct device_attribute *attr, char *buf) {
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data->query.has_image16);
+}
+
+static ssize_t rmi_fn_54_has_image8_show(struct device *dev,
+ struct device_attribute *attr, char *buf) {
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data->query.has_image8);
+}
+
+static ssize_t rmi_fn_54_has_baseline_show(struct device *dev,
+ struct device_attribute *attr, char *buf) {
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data->query.has_baseline);
+}
+
+static ssize_t rmi_fn_54_clock_rate_show(struct device *dev,
+ struct device_attribute *attr, char *buf) {
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data->query.clock_rate);
+}
+
+
+static ssize_t rmi_fn_54_touch_controller_family_show(struct device *dev,
+ struct device_attribute *attr, char *buf) {
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data->query.touch_controller_family);
+}
+
+
+static ssize_t rmi_fn_54_has_pixel_touch_threshold_adjustment_show(
+ struct device *dev, struct device_attribute *attr, char *buf) {
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data->query.has_pixel_touch_threshold_adjustment);
+}
+
+static ssize_t rmi_fn_54_has_sensor_assignment_show(struct device *dev,
+ struct device_attribute *attr, char *buf) {
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data->query.has_sensor_assignment);
+}
+
+static ssize_t rmi_fn_54_has_interference_metric_show(struct device *dev,
+ struct device_attribute *attr, char *buf) {
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data->query.has_interference_metric);
+}
+
+static ssize_t rmi_fn_54_has_sense_frequency_control_show(struct device *dev,
+ struct device_attribute *attr, char *buf) {
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data->query.has_sense_frequency_control);
+}
+
+static ssize_t rmi_fn_54_has_firmware_noise_mitigation_show(struct device *dev,
+ struct device_attribute *attr, char *buf) {
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data->query.has_firmware_noise_mitigation);
+}
+
+static ssize_t rmi_fn_54_has_two_byte_report_rate_show(struct device *dev,
+ struct device_attribute *attr, char *buf) {
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data->query.has_two_byte_report_rate);
+}
+
+static ssize_t rmi_fn_54_has_one_byte_report_rate_show(struct device *dev,
+ struct device_attribute *attr, char *buf) {
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data->query.has_one_byte_report_rate);
+}
+
+static ssize_t rmi_fn_54_has_relaxation_control_show(struct device *dev,
+ struct device_attribute *attr, char *buf) {
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data->query.has_relaxation_control);
+}
+
+static ssize_t rmi_fn_54_curve_compensation_mode_show(struct device *dev,
+ struct device_attribute *attr, char *buf) {
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data->query.curve_compensation_mode);
+}
+
+static ssize_t rmi_fn_54_has_iir_filter_show(struct device *dev,
+ struct device_attribute *attr, char *buf) {
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data->query.has_iir_filter);
+}
+
+static ssize_t rmi_fn_54_has_cmn_removal_show(struct device *dev,
+ struct device_attribute *attr, char *buf) {
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data->query.has_cmn_removal);
+}
+
+static ssize_t rmi_fn_54_has_cmn_maximum_show(struct device *dev,
+ struct device_attribute *attr, char *buf) {
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data->query.has_cmn_maximum);
+}
+
+static ssize_t rmi_fn_54_has_pixel_threshold_hysteresis_show(struct device *dev,
+ struct device_attribute *attr, char *buf) {
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data->query.has_pixel_threshold_hysteresis);
+}
+
+static ssize_t rmi_fn_54_has_edge_compensation_show(struct device *dev,
+ struct device_attribute *attr, char *buf) {
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data->query.has_edge_compensation);
+}
+
+static ssize_t rmi_fn_54_has_perf_frequency_noisecontrol_show(
+ struct device *dev, struct device_attribute *attr, char *buf) {
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data->query.has_perf_frequency_noisecontrol);
+}
+
+static ssize_t rmi_fn_54_number_of_sensing_frequencies_show(struct device *dev,
+ struct device_attribute *attr, char *buf) {
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *data;
+
+ fc = to_rmi_function_container(dev);
+ data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data->query.number_of_sensing_frequencies);
+}
+
+
+static ssize_t rmi_fn_54_no_auto_cal_show(struct device *dev,
+ struct device_attribute *attr, char *buf) {
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *instance_data;
+
+ fc = to_rmi_function_container(dev);
+ instance_data = fc->data;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ instance_data->no_auto_cal ? 1 : 0);
+}
+
+static ssize_t rmi_fn_54_no_auto_cal_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count) {
+ int result;
+ unsigned long val;
+ unsigned char data;
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *instance_data;
+
+ fc = to_rmi_function_container(dev);
+ instance_data = fc->data;
+
+ /* need to convert the string data to an actual value */
+ result = strict_strtoul(buf, 10, &val);
+
+ /* if an error occured, return it */
+ if (result)
+ return result;
+ /* Do nothing if not 0 or 1. This prevents accidental commands. */
+ if (val > 1)
+ return count;
+ /* Read current control values */
+ result =
+ rmi_read_block(fc->rmi_dev, fc->fd.control_base_addr, &data, 1);
+
+ /* if the current control registers are already set as we want them, do
+ * nothing to them */
+ if ((data & 1) == val)
+ return count;
+ /* Write the control back to the control register (F54_AD_Ctrl0)
+ * Ignores everything but bit 0 */
+ data = (data & ~1) | (val & 0x01); /* bit mask for lowest bit */
+ result =
+ rmi_write_block(fc->rmi_dev, fc->fd.control_base_addr, &data, 1);
+ if (result < 0) {
+ dev_err(dev, "%s : Could not write control to 0x%x\n",
+ __func__, fc->fd.control_base_addr);
+ return result;
+ }
+ /* update our internal representation iff the write succeeds */
+ instance_data->no_auto_cal = (val == 1);
+ return count;
+}
+
+static ssize_t rmi_fn_54_fifoindex_show(struct device *dev,
+ struct device_attribute *attr, char *buf) {
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *instance_data;
+ struct rmi_driver *driver;
+ unsigned char temp_buf[2];
+ int retval;
+
+ fc = to_rmi_function_container(dev);
+ instance_data = fc->data;
+ driver = fc->rmi_dev->driver;
+
+ /* Read fifoindex from device */
+ retval = rmi_read_block(fc->rmi_dev,
+ fc->fd.data_base_addr + RMI_F54_FIFO_OFFSET,
+ temp_buf, ARRAY_SIZE(temp_buf));
+
+ if (retval < 0) {
+ dev_err(dev, "Could not read fifoindex from 0x%04x\n",
+ fc->fd.data_base_addr + RMI_F54_FIFO_OFFSET);
+ return retval;
+ }
+ batohs(&instance_data->fifoindex, temp_buf);
+ return snprintf(buf, PAGE_SIZE, "%u\n", instance_data->fifoindex);
+}
+
+static ssize_t rmi_fn_54_fifoindex_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t count)
+{
+ int error;
+ unsigned long val;
+ unsigned char data[2];
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *instance_data;
+
+ fc = to_rmi_function_container(dev);
+ instance_data = fc->data;
+
+ /* need to convert the string data to an actual value */
+ error = strict_strtoul(buf, 10, &val);
+
+ if (error)
+ return error;
+
+ instance_data->fifoindex = val;
+
+ /* Write the FifoIndex back to the first data registers. */
+ hstoba(data, (unsigned short)val);
+
+ error = rmi_write_block(fc->rmi_dev,
+ fc->fd.data_base_addr + RMI_F54_FIFO_OFFSET,
+ data,
+ ARRAY_SIZE(data));
+
+ if (error < 0) {
+ dev_err(dev, "%s : Could not write fifoindex to 0x%x\n",
+ __func__, fc->fd.data_base_addr + RMI_F54_FIFO_OFFSET);
+ return error;
+ }
+ return count;
+}
+
+/* Provide access to last report */
+#ifdef KERNEL_VERSION_ABOVE_2_6_32
+static ssize_t rmi_fn_54_data_read(struct file *data_file, struct kobject *kobj,
+#else
+static ssize_t rmi_fn_54_data_read(struct kobject *kobj,
+#endif
+ struct bin_attribute *attributes,
+ char *buf, loff_t pos, size_t count)
+{
+ struct device *dev;
+ struct rmi_function_container *fc;
+ struct rmi_fn_54_data *instance_data;
+
+ dev = container_of(kobj, struct device, kobj);
+ fc = to_rmi_function_container(dev);
+ instance_data = fc->data;
+ mutex_lock(&instance_data->data_mutex);
+ if (count < instance_data->report_size) {
+ dev_err(dev,
+ "%s: F54 report size too large for buffer: %d."
+ " Need at least: %d for Report type: %d.\n",
+ __func__, count, instance_data->report_size,
+ instance_data->report_type);
+ mutex_unlock(&instance_data->data_mutex);
+ return -EINVAL;
+ }
+ if (instance_data->report_data) {
+ /* Copy data from instance_data to buffer */
+ memcpy(buf, instance_data->report_data,
+ instance_data->report_size);
+ mutex_unlock(&instance_data->data_mutex);
+ dev_dbg(dev, "%s: Presumably successful.", __func__);
+ return instance_data->report_size;
+ } else {
+ dev_err(dev, "%s: F54 report_data does not exist!\n", __func__);
+ mutex_unlock(&instance_data->data_mutex);
+ return -EINVAL;
+ }
+}
+
+
+static struct rmi_function_handler function_handler = {
+ .func = 0x54,
+ .init = rmi_f54_init,
+ .config = rmi_f54_config,
+ .reset = rmi_f54_reset,
+ .attention = rmi_f54_attention,
+ .remove = rmi_f54_remove
+};
+
+static int __init rmi_f54_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_f54_module_exit(void)
+{
+ /* There is no function handler specific data to be freed here.
+ * Function container specific data will be freed as part of the
+ * unregistration process.
+ */
+ rmi_unregister_function_driver(&function_handler);
+}
+
+module_init(rmi_f54_module_init);
+module_exit(rmi_f54_module_exit);
+
+MODULE_AUTHOR("Daniel Rosenberg <daniel.rosenberg@xxxxxxxxxxxxx>");
+MODULE_DESCRIPTION("RMI F54 module");
+MODULE_LICENSE("GPL");
+
--
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