Release 4.11 drivers/input/rmi4/rmi_f01.c
/*
* Copyright (c) 2011-2016 Synaptics Incorporated
* Copyright (c) 2011 Unixphere
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/rmi.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/of.h>
#include <asm/unaligned.h>
#include "rmi_driver.h"
#define RMI_PRODUCT_ID_LENGTH 10
#define RMI_PRODUCT_INFO_LENGTH 2
#define RMI_DATE_CODE_LENGTH 3
#define PRODUCT_ID_OFFSET 0x10
#define PRODUCT_INFO_OFFSET 0x1E
/* Force a firmware reset of the sensor */
#define RMI_F01_CMD_DEVICE_RESET 1
/* Various F01_RMI_QueryX bits */
#define RMI_F01_QRY1_CUSTOM_MAP BIT(0)
#define RMI_F01_QRY1_NON_COMPLIANT BIT(1)
#define RMI_F01_QRY1_HAS_LTS BIT(2)
#define RMI_F01_QRY1_HAS_SENSOR_ID BIT(3)
#define RMI_F01_QRY1_HAS_CHARGER_INP BIT(4)
#define RMI_F01_QRY1_HAS_ADJ_DOZE BIT(5)
#define RMI_F01_QRY1_HAS_ADJ_DOZE_HOFF BIT(6)
#define RMI_F01_QRY1_HAS_QUERY42 BIT(7)
#define RMI_F01_QRY5_YEAR_MASK 0x1f
#define RMI_F01_QRY6_MONTH_MASK 0x0f
#define RMI_F01_QRY7_DAY_MASK 0x1f
#define RMI_F01_QRY2_PRODINFO_MASK 0x7f
#define RMI_F01_BASIC_QUERY_LEN 21
/* From Query 00 through 20 */
struct f01_basic_properties {
u8 manufacturer_id;
bool has_lts;
bool has_adjustable_doze;
bool has_adjustable_doze_holdoff;
char dom[11]; /* YYYY/MM/DD + '\0' */
u8 product_id[RMI_PRODUCT_ID_LENGTH + 1];
u16 productinfo;
u32 firmware_id;
u32 package_id;
};
/* F01 device status bits */
/* Most recent device status event */
#define RMI_F01_STATUS_CODE(status) ((status) & 0x0f)
/* The device has lost its configuration for some reason. */
#define RMI_F01_STATUS_UNCONFIGURED(status) (!!((status) & 0x80))
/* The device is in bootloader mode */
#define RMI_F01_STATUS_BOOTLOADER(status) ((status) & 0x40)
/* Control register bits */
/*
* Sleep mode controls power management on the device and affects all
* functions of the device.
*/
#define RMI_F01_CTRL0_SLEEP_MODE_MASK 0x03
#define RMI_SLEEP_MODE_NORMAL 0x00
#define RMI_SLEEP_MODE_SENSOR_SLEEP 0x01
#define RMI_SLEEP_MODE_RESERVED0 0x02
#define RMI_SLEEP_MODE_RESERVED1 0x03
/*
* This bit disables whatever sleep mode may be selected by the sleep_mode
* field and forces the device to run at full power without sleeping.
*/
#define RMI_F01_CTRL0_NOSLEEP_BIT BIT(2)
/*
* When this bit is set, the touch controller employs a noise-filtering
* algorithm designed for use with a connected battery charger.
*/
#define RMI_F01_CTRL0_CHARGER_BIT BIT(5)
/*
* Sets the report rate for the device. The effect of this setting is
* highly product dependent. Check the spec sheet for your particular
* touch sensor.
*/
#define RMI_F01_CTRL0_REPORTRATE_BIT BIT(6)
/*
* Written by the host as an indicator that the device has been
* successfully configured.
*/
#define RMI_F01_CTRL0_CONFIGURED_BIT BIT(7)
/**
* @ctrl0 - see the bit definitions above.
* @doze_interval - controls the interval between checks for finger presence
* when the touch sensor is in doze mode, in units of 10ms.
* @wakeup_threshold - controls the capacitance threshold at which the touch
* sensor will decide to wake up from that low power state.
* @doze_holdoff - controls how long the touch sensor waits after the last
* finger lifts before entering the doze state, in units of 100ms.
*/
struct f01_device_control {
u8 ctrl0;
u8 doze_interval;
u8 wakeup_threshold;
u8 doze_holdoff;
};
struct f01_data {
struct f01_basic_properties properties;
struct f01_device_control device_control;
u16 doze_interval_addr;
u16 wakeup_threshold_addr;
u16 doze_holdoff_addr;
bool suspended;
bool old_nosleep;
unsigned int num_of_irq_regs;
};
static int rmi_f01_read_properties(struct rmi_device *rmi_dev,
u16 query_base_addr,
struct f01_basic_properties *props)
{
u8 queries[RMI_F01_BASIC_QUERY_LEN];
int ret;
int query_offset = query_base_addr;
bool has_ds4_queries = false;
bool has_query42 = false;
bool has_sensor_id = false;
bool has_package_id_query = false;
bool has_build_id_query = false;
u16 prod_info_addr;
u8 ds4_query_len;
ret = rmi_read_block(rmi_dev, query_offset,
queries, RMI_F01_BASIC_QUERY_LEN);
if (ret) {
dev_err(&rmi_dev->dev,
"Failed to read device query registers: %d\n", ret);
return ret;
}
prod_info_addr = query_offset + 17;
query_offset += RMI_F01_BASIC_QUERY_LEN;
/* Now parse what we got */
props->manufacturer_id = queries[0];
props->has_lts = queries[1] & RMI_F01_QRY1_HAS_LTS;
props->has_adjustable_doze =
queries[1] & RMI_F01_QRY1_HAS_ADJ_DOZE;
props->has_adjustable_doze_holdoff =
queries[1] & RMI_F01_QRY1_HAS_ADJ_DOZE_HOFF;
has_query42 = queries[1] & RMI_F01_QRY1_HAS_QUERY42;
has_sensor_id = queries[1] & RMI_F01_QRY1_HAS_SENSOR_ID;
snprintf(props->dom, sizeof(props->dom), "20%02d/%02d/%02d",
queries[5] & RMI_F01_QRY5_YEAR_MASK,
queries[6] & RMI_F01_QRY6_MONTH_MASK,
queries[7] & RMI_F01_QRY7_DAY_MASK);
memcpy(props->product_id, &queries[11],
RMI_PRODUCT_ID_LENGTH);
props->product_id[RMI_PRODUCT_ID_LENGTH] = '\0';
props->productinfo =
((queries[2] & RMI_F01_QRY2_PRODINFO_MASK) << 7) |
(queries[3] & RMI_F01_QRY2_PRODINFO_MASK);
if (has_sensor_id)
query_offset++;
if (has_query42) {
ret = rmi_read(rmi_dev, query_offset, queries);
if (ret) {
dev_err(&rmi_dev->dev,
"Failed to read query 42 register: %d\n", ret);
return ret;
}
has_ds4_queries = !!(queries[0] & BIT(0));
query_offset++;
}
if (has_ds4_queries) {
ret = rmi_read(rmi_dev, query_offset, &ds4_query_len);
if (ret) {
dev_err(&rmi_dev->dev,
"Failed to read DS4 queries length: %d\n", ret);
return ret;
}
query_offset++;
if (ds4_query_len > 0) {
ret = rmi_read(rmi_dev, query_offset, queries);
if (ret) {
dev_err(&rmi_dev->dev,
"Failed to read DS4 queries: %d\n",
ret);
return ret;
}
has_package_id_query = !!(queries[0] & BIT(0));
has_build_id_query = !!(queries[0] & BIT(1));
}
if (has_package_id_query) {
ret = rmi_read_block(rmi_dev, prod_info_addr,
queries, sizeof(__le64));
if (ret) {
dev_err(&rmi_dev->dev,
"Failed to read package info: %d\n",
ret);
return ret;
}
props->package_id = get_unaligned_le64(queries);
prod_info_addr++;
}
if (has_build_id_query) {
ret = rmi_read_block(rmi_dev, prod_info_addr, queries,
3);
if (ret) {
dev_err(&rmi_dev->dev,
"Failed to read product info: %d\n",
ret);
return ret;
}
props->firmware_id = queries[1] << 8 | queries[0];
props->firmware_id += queries[2] * 65536;
}
}
return 0;
}
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const char *rmi_f01_get_product_ID(struct rmi_function *fn)
{
struct f01_data *f01 = dev_get_drvdata(&fn->dev);
return f01->properties.product_id;
}
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static ssize_t rmi_driver_manufacturer_id_show(struct device *dev,
struct device_attribute *dattr,
char *buf)
{
struct rmi_driver_data *data = dev_get_drvdata(dev);
struct f01_data *f01 = dev_get_drvdata(&data->f01_container->dev);
return scnprintf(buf, PAGE_SIZE, "%d\n",
f01->properties.manufacturer_id);
}
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static DEVICE_ATTR(manufacturer_id, 0444,
rmi_driver_manufacturer_id_show, NULL);
static ssize_t rmi_driver_dom_show(struct device *dev,
struct device_attribute *dattr, char *buf)
{
struct rmi_driver_data *data = dev_get_drvdata(dev);
struct f01_data *f01 = dev_get_drvdata(&data->f01_container->dev);
return scnprintf(buf, PAGE_SIZE, "%s\n", f01->properties.dom);
}
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static DEVICE_ATTR(date_of_manufacture, 0444, rmi_driver_dom_show, NULL);
static ssize_t rmi_driver_product_id_show(struct device *dev,
struct device_attribute *dattr,
char *buf)
{
struct rmi_driver_data *data = dev_get_drvdata(dev);
struct f01_data *f01 = dev_get_drvdata(&data->f01_container->dev);
return scnprintf(buf, PAGE_SIZE, "%s\n", f01->properties.product_id);
}
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static DEVICE_ATTR(product_id, 0444, rmi_driver_product_id_show, NULL);
static ssize_t rmi_driver_firmware_id_show(struct device *dev,
struct device_attribute *dattr,
char *buf)
{
struct rmi_driver_data *data = dev_get_drvdata(dev);
struct f01_data *f01 = dev_get_drvdata(&data->f01_container->dev);
return scnprintf(buf, PAGE_SIZE, "%d\n", f01->properties.firmware_id);
}
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static DEVICE_ATTR(firmware_id, 0444, rmi_driver_firmware_id_show, NULL);
static ssize_t rmi_driver_package_id_show(struct device *dev,
struct device_attribute *dattr,
char *buf)
{
struct rmi_driver_data *data = dev_get_drvdata(dev);
struct f01_data *f01 = dev_get_drvdata(&data->f01_container->dev);
u32 package_id = f01->properties.package_id;
return scnprintf(buf, PAGE_SIZE, "%04x.%04x\n",
package_id & 0xffff, (package_id >> 16) & 0xffff);
}
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static DEVICE_ATTR(package_id, 0444, rmi_driver_package_id_show, NULL);
static struct attribute *rmi_f01_attrs[] = {
&dev_attr_manufacturer_id.attr,
&dev_attr_date_of_manufacture.attr,
&dev_attr_product_id.attr,
&dev_attr_firmware_id.attr,
&dev_attr_package_id.attr,
NULL
};
static struct attribute_group rmi_f01_attr_group = {
.attrs = rmi_f01_attrs,
};
#ifdef CONFIG_OF
static int rmi_f01_of_probe(struct device *dev,
struct rmi_device_platform_data *pdata)
{
int retval;
u32 val;
retval = rmi_of_property_read_u32(dev,
(u32 *)&pdata->power_management.nosleep,
"syna,nosleep-mode", 1);
if (retval)
return retval;
retval = rmi_of_property_read_u32(dev, &val,
"syna,wakeup-threshold", 1);
if (retval)
return retval;
pdata->power_management.wakeup_threshold = val;
retval = rmi_of_property_read_u32(dev, &val,
"syna,doze-holdoff-ms", 1);
if (retval)
return retval;
pdata->power_management.doze_holdoff = val * 100;
retval = rmi_of_property_read_u32(dev, &val,
"syna,doze-interval-ms", 1);
if (retval)
return retval;
pdata->power_management.doze_interval = val / 10;
return 0;
}
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#else
static inline int rmi_f01_of_probe(struct device *dev,
struct rmi_device_platform_data *pdata)
{
return -ENODEV;
}
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#endif
static int rmi_f01_probe(struct rmi_function *fn)
{
struct rmi_device *rmi_dev = fn->rmi_dev;
struct rmi_driver_data *driver_data = dev_get_drvdata(&rmi_dev->dev);
struct rmi_device_platform_data *pdata = rmi_get_platform_data(rmi_dev);
struct f01_data *f01;
int error;
u16 ctrl_base_addr = fn->fd.control_base_addr;
u8 device_status;
u8 temp;
if (fn->dev.of_node) {
error = rmi_f01_of_probe(&fn->dev, pdata);
if (error)
return error;
}
f01 = devm_kzalloc(&fn->dev, sizeof(struct f01_data), GFP_KERNEL);
if (!f01)
return -ENOMEM;
f01->num_of_irq_regs = driver_data->num_of_irq_regs;
/*
* Set the configured bit and (optionally) other important stuff
* in the device control register.
*/
error = rmi_read(rmi_dev, fn->fd.control_base_addr,
&f01->device_control.ctrl0);
if (error) {
dev_err(&fn->dev, "Failed to read F01 control: %d\n", error);
return error;
}
switch (pdata->power_management.nosleep) {
case RMI_REG_STATE_DEFAULT:
break;
case RMI_REG_STATE_OFF:
f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_NOSLEEP_BIT;
break;
case RMI_REG_STATE_ON:
f01->device_control.ctrl0 |= RMI_F01_CTRL0_NOSLEEP_BIT;
break;
}
/*
* Sleep mode might be set as a hangover from a system crash or
* reboot without power cycle. If so, clear it so the sensor
* is certain to function.
*/
if ((f01->device_control.ctrl0 & RMI_F01_CTRL0_SLEEP_MODE_MASK) !=
RMI_SLEEP_MODE_NORMAL) {
dev_warn(&fn->dev,
"WARNING: Non-zero sleep mode found. Clearing...\n");
f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_SLEEP_MODE_MASK;
}
f01->device_control.ctrl0 |= RMI_F01_CTRL0_CONFIGURED_BIT;
error = rmi_write(rmi_dev, fn->fd.control_base_addr,
f01->device_control.ctrl0);
if (error) {
dev_err(&fn->dev, "Failed to write F01 control: %d\n", error);
return error;
}
/* Dummy read in order to clear irqs */
error = rmi_read(rmi_dev, fn->fd.data_base_addr + 1, &temp);
if (error < 0) {
dev_err(&fn->dev, "Failed to read Interrupt Status.\n");
return error;
}
error = rmi_f01_read_properties(rmi_dev, fn->fd.query_base_addr,
&f01->properties);
if (error < 0) {
dev_err(&fn->dev, "Failed to read F01 properties.\n");
return error;
}
dev_info(&fn->dev, "found RMI device, manufacturer: %s, product: %s, fw id: %d\n",
f01->properties.manufacturer_id == 1 ? "Synaptics" : "unknown",
f01->properties.product_id, f01->properties.firmware_id);
/* Advance to interrupt control registers, then skip over them. */
ctrl_base_addr++;
ctrl_base_addr += f01->num_of_irq_regs;
/* read control register */
if (f01->properties.has_adjustable_doze) {
f01->doze_interval_addr = ctrl_base_addr;
ctrl_base_addr++;
if (pdata->power_management.doze_interval) {
f01->device_control.doze_interval =
pdata->power_management.doze_interval;
error = rmi_write(rmi_dev, f01->doze_interval_addr,
f01->device_control.doze_interval);
if (error) {
dev_err(&fn->dev,
"Failed to configure F01 doze interval register: %d\n",
error);
return error;
}
} else {
error = rmi_read(rmi_dev, f01->doze_interval_addr,
&f01->device_control.doze_interval);
if (error) {
dev_err(&fn->dev,
"Failed to read F01 doze interval register: %d\n",
error);
return error;
}
}
f01->wakeup_threshold_addr = ctrl_base_addr;
ctrl_base_addr++;
if (pdata->power_management.wakeup_threshold) {
f01->device_control.wakeup_threshold =
pdata->power_management.wakeup_threshold;
error = rmi_write(rmi_dev, f01->wakeup_threshold_addr,
f01->device_control.wakeup_threshold);
if (error) {
dev_err(&fn->dev,
"Failed to configure F01 wakeup threshold register: %d\n",
error);
return error;
}
} else {
error = rmi_read(rmi_dev, f01->wakeup_threshold_addr,
&f01->device_control.wakeup_threshold);
if (error < 0) {
dev_err(&fn->dev,
"Failed to read F01 wakeup threshold register: %d\n",
error);
return error;
}
}
}
if (f01->properties.has_lts)
ctrl_base_addr++;
if (f01->properties.has_adjustable_doze_holdoff) {
f01->doze_holdoff_addr = ctrl_base_addr;
ctrl_base_addr++;
if (pdata->power_management.doze_holdoff) {
f01->device_control.doze_holdoff =
pdata->power_management.doze_holdoff;
error = rmi_write(rmi_dev, f01->doze_holdoff_addr,
f01->device_control.doze_holdoff);
if (error) {
dev_err(&fn->dev,
"Failed to configure F01 doze holdoff register: %d\n",
error);
return error;
}
} else {
error = rmi_read(rmi_dev, f01->doze_holdoff_addr,
&f01->device_control.doze_holdoff);
if (error) {
dev_err(&fn->dev,
"Failed to read F01 doze holdoff register: %d\n",
error);
return error;
}
}
}
error = rmi_read(rmi_dev, fn->fd.data_base_addr, &device_status);
if (error < 0) {
dev_err(&fn->dev,
"Failed to read device status: %d\n", error);
return error;
}
if (RMI_F01_STATUS_UNCONFIGURED(device_status)) {
dev_err(&fn->dev,
"Device was reset during configuration process, status: %#02x!\n",
RMI_F01_STATUS_CODE(device_status));
return -EINVAL;
}
dev_set_drvdata(&fn->dev, f01);
error = sysfs_create_group(&fn->rmi_dev->dev.kobj, &rmi_f01_attr_group);
if (error)
dev_warn(&fn->dev, "Failed to create sysfs group: %d\n", error);
return 0;
}
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static void rmi_f01_remove(struct rmi_function *fn)
{
sysfs_remove_group(&fn->rmi_dev->dev.kobj, &rmi_f01_attr_group);
}
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static int rmi_f01_config(struct rmi_function *fn)
{
struct f01_data *f01 = dev_get_drvdata(&fn->dev);
int error;
error = rmi_write(fn->rmi_dev, fn->fd.control_base_addr,
f01->device_control.ctrl0);
if (error) {
dev_err(&fn->dev,
"Failed to write device_control register: %d\n", error);
return error;
}
if (f01->properties.has_adjustable_doze) {
error = rmi_write(fn->rmi_dev, f01->doze_interval_addr,
f01->device_control.doze_interval);
if (error) {
dev_err(&fn->dev,
"Failed to write doze interval: %d\n", error);
return error;
}
error = rmi_write_block(fn->rmi_dev,
f01->wakeup_threshold_addr,
&f01->device_control.wakeup_threshold,
sizeof(u8));
if (error) {
dev_err(&fn->dev,
"Failed to write wakeup threshold: %d\n",
error);
return error;
}
}
if (f01->properties.has_adjustable_doze_holdoff) {
error = rmi_write(fn->rmi_dev, f01->doze_holdoff_addr,
f01->device_control.doze_holdoff);
if (error) {
dev_err(&fn->dev,
"Failed to write doze holdoff: %d\n", error);
return error;
}
}
return 0;
}
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static int rmi_f01_suspend(struct rmi_function *fn)
{
struct f01_data *f01 = dev_get_drvdata(&fn->dev);
int error;
f01->old_nosleep =
f01->device_control.ctrl0 & RMI_F01_CTRL0_NOSLEEP_BIT;
f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_NOSLEEP_BIT;
f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_SLEEP_MODE_MASK;
if (device_may_wakeup(fn->rmi_dev->xport->dev))
f01->device_control.ctrl0 |= RMI_SLEEP_MODE_RESERVED1;
else
f01->device_control.ctrl0 |= RMI_SLEEP_MODE_SENSOR_SLEEP;
error = rmi_write(fn->rmi_dev, fn->fd.control_base_addr,
f01->device_control.ctrl0);
if (error) {
dev_err(&fn->dev, "Failed to write sleep mode: %d.\n", error);
if (f01->old_nosleep)
f01->device_control.ctrl0 |= RMI_F01_CTRL0_NOSLEEP_BIT;
f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_SLEEP_MODE_MASK;
f01->device_control.ctrl0 |= RMI_SLEEP_MODE_NORMAL;
return error;
}
return 0;
}
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static int rmi_f01_resume(struct rmi_function *fn)
{
struct f01_data *f01 = dev_get_drvdata(&fn->dev);
int error;
if (f01->old_nosleep)
f01->device_control.ctrl0 |= RMI_F01_CTRL0_NOSLEEP_BIT;
f01->device_control.ctrl0 &= ~RMI_F01_CTRL0_SLEEP_MODE_MASK;
f01->device_control.ctrl0 |= RMI_SLEEP_MODE_NORMAL;
error = rmi_write(fn->rmi_dev, fn->fd.control_base_addr,
f01->device_control.ctrl0);
if (error) {
dev_err(&fn->dev,
"Failed to restore normal operation: %d.\n", error);
return error;
}
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Andrew Duggan | 102 | 99.03% | 1 | 50.00% |
Nick Dyer | 1 | 0.97% | 1 | 50.00% |
Total | 103 | 100.00% | 2 | 100.00% |
static int rmi_f01_attention(struct rmi_function *fn,
unsigned long *irq_bits