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Date: Tue, 7 Aug 2012 16:09:30 +0300
From: Ferruh Yigit <fery@...ress.com>
To: Dmitry Torokhov <dmitry.torokhov@...il.com>
CC: Kevin McNeely <kev@...ress.com>, Ferruh YIGIT <fery@...ress.com>,
Javier Martinez Canillas <javier@...hile0.org>,
Henrik Rydberg <rydberg@...omail.se>,
Shawn Landden <shawnlandden@...il.com>,
Ashish Jangam <ashish.jangam@...tcummins.com>,
Olivier Sobrie <olivier@...rie.be>,
linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/4] Input: cyttsp4 - bus driver for Cypress TMA4XX touchscreen devices
From: Ferruh YIGIT <fery@...ress.com>
This driver is for Cypress TrueTouch(tm) Standard Product controllers,
Generation4 devices.
Driver consist of four main modules:
Bus driver: Linux bus driver implementation, binds other modules.
Core driver: Core module that communicate with TTSP controller.
MT driver: MultiTouch driver, converts touch information to host specific
touch events
Adapter driver: Communication adapter between host and controller, like
I2C or SPI.
This is Cyttsp4 TTSP Bus Driver,
Provides binding between Adapter, Core, and TTSP Modules.
A complete set of corresponding Adapter, Core, and TTSP module
devices and drivers must be registered with the TTSP Bus handler
Signed-off-by: Ferruh YIGIT <fery@...ress.com>
---
drivers/input/touchscreen/Kconfig | 9 +
drivers/input/touchscreen/Makefile | 1 +
drivers/input/touchscreen/cyttsp4_bus.c | 608 +++++++++++++++++++++++++++++++
include/linux/cyttsp4_bus.h | 271 ++++++++++++++
4 files changed, 889 insertions(+)
create mode 100644 drivers/input/touchscreen/cyttsp4_bus.c
create mode 100644 include/linux/cyttsp4_bus.h
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 1ba232c..4a65736 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -179,6 +179,15 @@ config TOUCHSCREEN_CYTTSP_SPI
To compile this driver as a module, choose M here: the
module will be called cyttsp_spi.
+config CYPRESS_CYTTSP4_BUS
+ bool "Cypress TTSP core bus"
+ default n
+ help
+ This option enables support Cypress TTSP core bus.
+ This support is needed for various device and drivers
+ using Cypress TrueTouch(TM) Standard Product
+ protocol.
+
config TOUCHSCREEN_DA9034
tristate "Touchscreen support for Dialog Semiconductor DA9034"
depends on PMIC_DA903X
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 178eb12..ab84aec 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -73,3 +73,4 @@ obj-$(CONFIG_TOUCHSCREEN_WM97XX_MAINSTONE) += mainstone-wm97xx.o
obj-$(CONFIG_TOUCHSCREEN_WM97XX_ZYLONITE) += zylonite-wm97xx.o
obj-$(CONFIG_TOUCHSCREEN_W90X900) += w90p910_ts.o
obj-$(CONFIG_TOUCHSCREEN_TPS6507X) += tps6507x-ts.o
+obj-$(CONFIG_CYPRESS_CYTTSP4_BUS) += cyttsp4_bus.o
diff --git a/drivers/input/touchscreen/cyttsp4_bus.c b/drivers/input/touchscreen/cyttsp4_bus.c
new file mode 100644
index 0000000..2e97088
--- /dev/null
+++ b/drivers/input/touchscreen/cyttsp4_bus.c
@@ -0,0 +1,608 @@
+/*
+ * cyttsp4_bus.c
+ * Cypress TrueTouch(TM) Standard Product V4 Bus Driver.
+ * For use with Cypress Txx4xx parts.
+ * Supported parts include:
+ * TMA4XX
+ * TMA1036
+ *
+ * Copyright (C) 2012 Cypress Semiconductor
+ * Copyright (C) 2011 Sony Ericsson Mobile Communications AB.
+ *
+ * Author: Aleksej Makarov aleksej.makarov@...yericsson.com
+ * Modified by: Cypress Semiconductor for complete set of TTSP Bus interfaces.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2, and only version 2, as published by the
+ * Free Software Foundation.
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * Contact Cypress Semiconductor at www.cypress.com <ttdrivers@...ress.com>
+ *
+ */
+
+#include <linux/cyttsp4_bus.h>
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+#include <linux/limits.h>
+
+static DEFINE_MUTEX(core_lock);
+static LIST_HEAD(adapter_list);
+static LIST_HEAD(core_dev_list);
+static LIST_HEAD(cyttsp4_dev_list);
+
+struct bus_type cyttsp4_bus_type;
+
+static void cyttsp4_dev_release(struct device *dev)
+{
+ dev_vdbg(dev, "%s: Enter\n", __func__);
+ put_device(dev->parent);
+}
+
+static struct device_type cyttsp4_dev_type = {
+ .release = cyttsp4_dev_release
+};
+
+static struct device_type cyttsp4_core_type = {
+ .release = cyttsp4_dev_release
+};
+
+static int _cyttsp4_register_dev(struct cyttsp4_device *pdev,
+ struct cyttsp4_core *core)
+{
+ int ret;
+
+ if (!pdev->dev.parent)
+ pdev->dev.parent = get_device(&core->dev);
+ /* Assign (new) core */
+ pdev->core = core;
+ /* Check whether this device is registered before */
+ if (pdev->dev.bus == &cyttsp4_bus_type &&
+ pdev->dev.type == &cyttsp4_dev_type)
+ return 0;
+
+ pdev->dev.bus = &cyttsp4_bus_type;
+ pdev->dev.type = &cyttsp4_dev_type;
+ dev_set_name(&pdev->dev, "%s.%s", pdev->name, core->id);
+
+ ret = device_register(&pdev->dev);
+ dev_dbg(&pdev->dev,
+ "%s: Registering device '%s'. Parent at '%s', err = %d\n",
+ __func__, dev_name(&pdev->dev),
+ dev_name(pdev->dev.parent), ret);
+ if (ret) {
+ dev_err(&pdev->dev, "%s: failed to register device, err %d\n",
+ __func__, ret);
+ pdev->dev.bus = NULL;
+ pdev->dev.type = NULL;
+ pdev->core = NULL;
+ }
+ return ret;
+}
+
+static int _cyttsp4_register_core(struct cyttsp4_core *pdev,
+ struct cyttsp4_adapter *adap)
+{
+ int ret;
+
+ if (!pdev->dev.parent)
+ pdev->dev.parent = get_device(adap->dev);
+ /* Assign (new) adapter */
+ pdev->adap = adap;
+ /* Check whether this core is registered before */
+ if (pdev->dev.bus == &cyttsp4_bus_type &&
+ pdev->dev.type == &cyttsp4_core_type)
+ return 0;
+
+ pdev->dev.bus = &cyttsp4_bus_type;
+ pdev->dev.type = &cyttsp4_core_type;
+ dev_set_name(&pdev->dev, "%s.%s", pdev->id, adap->id);
+
+ ret = device_register(&pdev->dev);
+ dev_dbg(&pdev->dev,
+ "%s: Registering device '%s'. Parent at '%s', err = %d\n",
+ __func__, dev_name(&pdev->dev),
+ dev_name(pdev->dev.parent), ret);
+ if (ret) {
+ dev_err(&pdev->dev, "%s: failed to register device, err %d\n",
+ __func__, ret);
+ pdev->dev.bus = NULL;
+ pdev->dev.type = NULL;
+ pdev->adap = NULL;
+ }
+ return ret;
+}
+
+static struct cyttsp4_adapter *find_adapter(char const *adap_id)
+{
+ struct cyttsp4_adapter *a;
+
+ list_for_each_entry(a, &adapter_list, node)
+ if (!strncmp(a->id, adap_id, NAME_MAX))
+ return a;
+ return NULL;
+}
+
+static struct cyttsp4_core *find_core(char const *core_id)
+{
+ struct cyttsp4_core *d;
+
+ list_for_each_entry(d, &core_dev_list, node)
+ if (!strncmp(d->id, core_id, NAME_MAX) && d->dev.driver)
+ return d;
+ return NULL;
+}
+
+static void rescan_devices(struct cyttsp4_core *core)
+{
+ struct cyttsp4_device *d;
+
+ list_for_each_entry(d, &cyttsp4_dev_list, node)
+ if (!d->core && !strncmp(core->id, d->core_id, NAME_MAX))
+ _cyttsp4_register_dev(d, core);
+}
+
+static void rescan_cores(struct cyttsp4_adapter *adap)
+{
+ struct cyttsp4_core *d;
+
+ list_for_each_entry(d, &core_dev_list, node)
+ if (!d->adap && !strncmp(adap->id, d->adap_id, NAME_MAX))
+ _cyttsp4_register_core(d, adap);
+}
+
+int cyttsp4_register_device(struct cyttsp4_device *pdev)
+{
+ int ret = 0;
+ struct cyttsp4_core *core;
+
+ if (!pdev)
+ return -EINVAL;
+ mutex_lock(&core_lock);
+ list_add(&pdev->node, &cyttsp4_dev_list);
+ pr_debug("%s: '%s' added to cyttsp4_dev_list\n", __func__, pdev->name);
+ core = find_core(pdev->core_id);
+ if (core)
+ ret = _cyttsp4_register_dev(pdev, core);
+ mutex_unlock(&core_lock);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(cyttsp4_register_device);
+
+static int cyttsp4_match_dev(struct device *dev, void *data)
+{
+ return dev == (struct device *)data;
+}
+
+void cyttsp4_unregister_device(struct cyttsp4_device *pdev)
+{
+ if (!pdev)
+ return;
+ mutex_lock(&core_lock);
+ if (bus_find_device(&cyttsp4_bus_type, NULL, &pdev->dev,
+ cyttsp4_match_dev)) {
+ dev_dbg(&pdev->dev, "%s: Unregistering device '%s'.\n",
+ __func__, dev_name(&pdev->dev));
+ /* Put reference taken by bus_find_device() */
+ put_device(&pdev->dev);
+ device_unregister(&pdev->dev);
+ }
+ list_del(&pdev->node);
+ pr_debug("%s: '%s' removed from cyttsp4_dev_list\n", __func__,
+ pdev->name);
+ mutex_unlock(&core_lock);
+}
+EXPORT_SYMBOL_GPL(cyttsp4_unregister_device);
+
+int cyttsp4_register_core_device(struct cyttsp4_core *pdev)
+{
+ int ret = 0;
+ struct cyttsp4_adapter *adap;
+
+ if (!pdev)
+ return -EINVAL;
+ mutex_lock(&core_lock);
+ if (find_core(pdev->id)) {
+ pr_debug("%s: core id '%s' already exists\n",
+ __func__, pdev->id);
+ ret = -EINVAL;
+ goto fail;
+ }
+ list_add(&pdev->node, &core_dev_list);
+ pr_debug("%s: '%s' added to core_dev_list\n", __func__, pdev->name);
+ adap = find_adapter(pdev->adap_id);
+ if (adap) {
+ pr_debug("%s: adapter for '%s' is '%s'\n", __func__,
+ pdev->id, dev_name(adap->dev));
+ ret = _cyttsp4_register_core(pdev, adap);
+ if (!ret)
+ rescan_devices(pdev);
+ }
+fail:
+ mutex_unlock(&core_lock);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(cyttsp4_register_core_device);
+
+int cyttsp4_add_adapter(char const *id, struct cyttsp4_ops const *ops,
+ struct device *parent)
+{
+ int rc = 0;
+ struct cyttsp4_adapter *a;
+
+ if (!parent) {
+ dev_err(parent, "%s: need parent for '%s'\n", __func__, id);
+ return -EINVAL;
+ }
+ mutex_lock(&core_lock);
+ if (find_adapter(id)) {
+ dev_err(parent, "%s: adapter '%s' already exists\n",
+ __func__, id);
+ rc = -EINVAL;
+ goto fail;
+ }
+ a = kzalloc(sizeof(*a), GFP_KERNEL);
+ if (!a) {
+ dev_err(parent, "%s: failed to allocate adapter '%s'\n",
+ __func__, id);
+ rc = -ENOMEM;
+ goto fail;
+ }
+ memcpy(a->id, id, sizeof(a->id));
+ a->id[sizeof(a->id) - 1] = 0;
+ a->read = ops->read;
+ a->write = ops->write;
+ a->dev = parent;
+ list_add(&a->node, &adapter_list);
+ dev_dbg(parent, "%s: '%s' added to adapter_list\n", __func__, id);
+ rescan_cores(a);
+fail:
+ mutex_unlock(&core_lock);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(cyttsp4_add_adapter);
+
+int cyttsp4_del_adapter(char const *id)
+{
+ int rc = 0;
+ struct cyttsp4_adapter *adap;
+ struct cyttsp4_core *core_dev;
+
+ mutex_lock(&core_lock);
+ adap = find_adapter(id);
+ if (!adap) {
+ pr_err("%s: adapter '%s' does not exist\n",
+ __func__, id);
+ rc = -EINVAL;
+ goto fail;
+ }
+
+ list_for_each_entry(core_dev, &core_dev_list, node)
+ if (core_dev->adap == adap)
+ core_dev->adap = NULL;
+
+ list_del(&adap->node);
+ kfree(adap);
+ pr_debug("%s: '%s' removed from adapter_list\n", __func__, id);
+fail:
+ mutex_unlock(&core_lock);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(cyttsp4_del_adapter);
+
+static struct cyttsp4_device *verify_device_type(struct device *dev)
+{
+ return dev->type == &cyttsp4_dev_type ? to_cyttsp4_device(dev) : NULL;
+}
+
+static struct cyttsp4_core *verify_core_type(struct device *dev)
+{
+ return dev->type == &cyttsp4_core_type ? to_cyttsp4_core(dev) : NULL;
+}
+
+static int cyttsp4_match_device(struct cyttsp4_device *dev, const char *name)
+{
+ return strncmp(dev->name, name, NAME_MAX) == 0;
+}
+
+static int cyttsp4_match_core_device(struct cyttsp4_core *core,
+ const char *name)
+{
+ return strncmp(core->name, name, NAME_MAX) == 0;
+}
+
+static int cyttsp4_device_match(struct device *dev, struct device_driver *drv)
+{
+ struct cyttsp4_device *cyttsp4_dev = verify_device_type(dev);
+ struct cyttsp4_core *cyttsp4_core;
+ int match;
+
+ if (cyttsp4_dev) {
+ match = cyttsp4_match_device(cyttsp4_dev, drv->name);
+ goto exit;
+ }
+ cyttsp4_core = verify_core_type(dev);
+ if (cyttsp4_core) {
+ match = cyttsp4_match_core_device(cyttsp4_core, drv->name);
+ goto exit;
+ }
+ match = 0;
+exit:
+ dev_dbg(dev, "%s: %s matching '%s' driver\n", __func__,
+ match ? "is" : "isn't", drv->name);
+ return match;
+}
+
+static ssize_t modalias_show(struct device *dev, struct device_attribute *a,
+ char *buf)
+{
+ struct cyttsp4_device *cyttsp4_dev = verify_device_type(dev);
+ struct cyttsp4_core *cyttsp4_core;
+
+ char const *name;
+ int len;
+
+ if (cyttsp4_dev) {
+ name = cyttsp4_dev->name;
+ goto exit;
+ }
+ cyttsp4_core = verify_core_type(dev);
+ if (cyttsp4_core) {
+ name = cyttsp4_core->id;
+ goto exit;
+ }
+ name = "none";
+exit:
+ len = snprintf(buf, PAGE_SIZE, "ttsp4:%s\n", name);
+ return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
+}
+
+static struct device_attribute cyttsp4_dev_attrs[] = {
+ __ATTR_RO(modalias),
+ __ATTR_NULL,
+};
+
+#ifdef CONFIG_SUSPEND
+static int cyttsp4_pm_suspend(struct device *dev)
+{
+ struct device_driver *drv = dev->driver;
+
+ dev_dbg(dev, "%s\n", __func__);
+ if (drv && drv->pm && drv->pm->suspend)
+ return drv->pm->suspend(dev);
+ return 0;
+}
+
+static int cyttsp4_pm_resume(struct device *dev)
+{
+ struct device_driver *drv = dev->driver;
+
+ dev_dbg(dev, "%s\n", __func__);
+ if (drv && drv->pm && drv->pm->resume)
+ return drv->pm->suspend(dev);
+ return 0;
+}
+#else /* !CONFIG_SUSPEND */
+#define cyttsp4_pm_suspend NULL
+#define cyttsp4_pm_resume NULL
+#endif /* !CONFIG_SUSPEND */
+
+#ifdef CONFIG_PM_RUNTIME
+#define cyttsp4_pm_rt_suspend pm_generic_runtime_suspend
+#define cyytsp4_pm_rt_resume pm_generic_runtime_resume
+#define cyytsp4_pm_rt_idle pm_generic_runtime_idle
+#else /* !CONFIG_PM_RUNTIME */
+#define cyttsp4_pm_rt_suspend NULL
+#define cyytsp4_pm_rt_resume NULL
+#define cyytsp4_pm_rt_idle NULL
+#endif /* !CONFIG_PM_RUNTIME */
+
+static const struct dev_pm_ops cyttsp4_dev_pm_ops = {
+ .suspend = cyttsp4_pm_suspend,
+ .resume = cyttsp4_pm_resume,
+ .runtime_suspend = cyttsp4_pm_rt_suspend,
+ .runtime_resume = cyytsp4_pm_rt_resume,
+ .runtime_idle = cyytsp4_pm_rt_idle,
+};
+
+struct bus_type cyttsp4_bus_type = {
+ .name = "ttsp4",
+ .dev_attrs = cyttsp4_dev_attrs,
+ .match = cyttsp4_device_match,
+ .uevent = NULL,
+ .pm = &cyttsp4_dev_pm_ops,
+};
+EXPORT_SYMBOL_GPL(cyttsp4_bus_type);
+
+static int cyttsp4_drv_remove(struct device *_dev)
+{
+ struct cyttsp4_driver *drv = to_cyttsp4_driver(_dev->driver);
+ struct cyttsp4_device *dev = to_cyttsp4_device(_dev);
+ return drv->remove(dev);
+}
+
+static int cyttsp4_core_drv_remove(struct device *_dev)
+{
+ struct cyttsp4_core_driver *drv = to_cyttsp4_core_driver(_dev->driver);
+ struct cyttsp4_core *dev = to_cyttsp4_core(_dev);
+ return drv->remove(dev);
+}
+
+static int cyttsp4_drv_probe(struct device *_dev)
+{
+ int rc = -ENODEV;
+ struct cyttsp4_driver *drv = to_cyttsp4_driver(_dev->driver);
+ struct cyttsp4_device *dev = to_cyttsp4_device(_dev);
+
+ rc = drv->probe(dev);
+ dev_dbg(_dev, "%s: for %s = %d\n", __func__, dev->name, rc);
+ return rc;
+}
+
+static int cyttsp4_core_drv_probe(struct device *_dev)
+{
+ int rc = -ENODEV;
+ struct cyttsp4_core_driver *drv = to_cyttsp4_core_driver(_dev->driver);
+ struct cyttsp4_core *dev = to_cyttsp4_core(_dev);
+
+ rc = drv->probe(dev);
+ dev_dbg(_dev, "%s: for %s = %d\n", __func__, dev->name, rc);
+ if (!rc)
+ rescan_devices(dev);
+ return rc;
+}
+
+int cyttsp4_register_driver(struct cyttsp4_driver *drv)
+{
+ int ret = 0;
+
+#ifdef CONFIG_MODULES
+ struct cyttsp4_device *d;
+
+ /*
+ * We need to ensure that the driver of this device's
+ * core device should exist (dependency)
+ * To do so, we traverse through the device, its core
+ * device and the driver of its core device, which requires
+ * the device itself should be registered with the system
+ */
+ mutex_lock(&core_lock);
+ list_for_each_entry(d, &cyttsp4_dev_list, node) {
+ if (!cyttsp4_match_device(d, drv->driver.name))
+ continue;
+ if (d->core) {
+ if (d->core->dev.driver)
+ ret = ref_module(drv->driver.owner,
+ d->core->dev.driver->owner);
+ else
+ /* Core device exists but not core driver */
+ ret = -ENODEV;
+ }
+ break;
+ }
+ mutex_unlock(&core_lock);
+
+ if (ret) {
+ if (ret == -ENODEV)
+ pr_err("%s: Core driver module does not exist\n",
+ __func__);
+ else
+ pr_err("%s: Error getting ref to core driver module\n",
+ __func__);
+ goto fail;
+ }
+#endif
+
+ drv->driver.bus = &cyttsp4_bus_type;
+ if (drv->probe)
+ drv->driver.probe = cyttsp4_drv_probe;
+ if (drv->remove)
+ drv->driver.remove = cyttsp4_drv_remove;
+ ret = driver_register(&drv->driver);
+fail:
+ pr_debug("%s: '%s' returned %d\n", __func__, drv->driver.name, ret);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(cyttsp4_register_driver);
+
+int cyttsp4_register_core_driver(struct cyttsp4_core_driver *drv)
+{
+ int ret = 0;
+
+#ifdef CONFIG_MODULES
+ struct cyttsp4_core *d;
+
+ /*
+ * We need to ensure that the driver of this core device's
+ * adapter should exist (dependency)
+ * To do so, we traverse through the core device, its adapter
+ * and the driver of its adapter, which requires the core
+ * device itself should be registered with the system
+ */
+ mutex_lock(&core_lock);
+ list_for_each_entry(d, &core_dev_list, node) {
+ if (!cyttsp4_match_core_device(d, drv->driver.name))
+ continue;
+ if (d->adap) {
+ if (d->adap->dev && d->adap->dev->driver) {
+ ret = ref_module(drv->driver.owner,
+ d->adap->dev->driver->owner);
+ } else {
+ /* Core dev exist but not adap device
+ * Do not let until adap module inserted */
+ ret = -ENODEV;
+ }
+ }
+ break;
+ }
+ mutex_unlock(&core_lock);
+
+ if (ret) {
+ if (ret == -ENODEV)
+ pr_err("%s: Adapter driver module does not exist\n",
+ __func__);
+ else
+ pr_err("%s: Error getting ref to adapter driver module\n",
+ __func__);
+ goto fail;
+ }
+#endif
+
+ drv->driver.bus = &cyttsp4_bus_type;
+ if (drv->probe)
+ drv->driver.probe = cyttsp4_core_drv_probe;
+ if (drv->remove)
+ drv->driver.remove = cyttsp4_core_drv_remove;
+ ret = driver_register(&drv->driver);
+fail:
+ pr_debug("%s: '%s' returned %d\n", __func__, drv->driver.name, ret);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(cyttsp4_register_core_driver);
+
+void cyttsp4_unregister_driver(struct cyttsp4_driver *drv)
+{
+ driver_unregister(&drv->driver);
+}
+EXPORT_SYMBOL_GPL(cyttsp4_unregister_driver);
+
+void cyttsp4_unregister_core_driver(struct cyttsp4_core_driver *drv)
+{
+ driver_unregister(&drv->driver);
+}
+EXPORT_SYMBOL_GPL(cyttsp4_unregister_core_driver);
+
+int __init cyttsp4_bus_init(void)
+{
+ int error;
+ error = bus_register(&cyttsp4_bus_type);
+ if (error)
+ pr_err("%s: error %d\n", __func__, error);
+ else
+ pr_debug("%s: ok\n", __func__);
+ return error;
+}
+
+static void __exit cyttsp4_bus_exit(void)
+{
+ pr_debug("%s: ok\n", __func__);
+}
+
+subsys_initcall(cyttsp4_bus_init);
+module_exit(cyttsp4_bus_exit);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Aleksej Makarov <aleksej.makarov@...yericsson.com>");
diff --git a/include/linux/cyttsp4_bus.h b/include/linux/cyttsp4_bus.h
new file mode 100644
index 0000000..b1f64ef
--- /dev/null
+++ b/include/linux/cyttsp4_bus.h
@@ -0,0 +1,271 @@
+/*
+ * cyttsp4_bus.h
+ * Cypress TrueTouch(TM) Standard Product V4 Bus Driver.
+ * For use with Cypress Txx4xx parts.
+ * Supported parts include:
+ * TMA4XX
+ * TMA1036
+ *
+ * Copyright (C) 2012 Cypress Semiconductor
+ * Copyright (C) 2011 Sony Ericsson Mobile Communications AB.
+ *
+ * Author: Aleksej Makarov <aleksej.makarov@...yericsson.com>
+ * Modified by: Cypress Semiconductor to add device functions
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2, and only version 2, as published by the
+ * Free Software Foundation.
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * Contact Cypress Semiconductor at www.cypress.com <ttdrivers@...ress.com>
+ *
+ */
+
+#ifndef _LINUX_CYTTSP4_BUS_H
+#define _LINUX_CYTTSP4_BUS_H
+
+#include <linux/device.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/limits.h>
+
+
+extern struct bus_type cyttsp4_bus_type;
+
+struct cyttsp4_driver;
+struct cyttsp4_device;
+struct cyttsp4_adapter;
+
+enum cyttsp4_atten_type {
+ CY_ATTEN_IRQ,
+ CY_ATTEN_STARTUP,
+ CY_ATTEN_EXCLUSIVE,
+ CY_ATTEN_NUM_ATTEN,
+};
+
+typedef int (*cyttsp4_atten_func) (struct cyttsp4_device *);
+
+struct cyttsp4_ops {
+ int (*write)(struct cyttsp4_adapter *dev, u8 addr,
+ const void *buf, int size);
+ int (*read)(struct cyttsp4_adapter *dev, u8 addr, void *buf, int size);
+};
+
+struct cyttsp4_adapter {
+ struct list_head node;
+ char id[NAME_MAX];
+ struct device *dev;
+ int (*write)(struct cyttsp4_adapter *dev, u8 addr,
+ const void *buf, int size);
+ int (*read)(struct cyttsp4_adapter *dev, u8 addr, void *buf, int size);
+};
+#define to_cyttsp4_adapter(d) container_of(d, struct cyttsp4_adapter, dev)
+
+struct cyttsp4_core {
+ struct list_head node;
+ char const *name;
+ char const *id;
+ char const *adap_id;
+ struct device dev;
+ struct cyttsp4_adapter *adap;
+};
+#define to_cyttsp4_core(d) container_of(d, struct cyttsp4_core, dev)
+
+struct cyttsp4_device {
+ struct list_head node;
+ char const *name;
+ char const *core_id;
+ struct device dev;
+ struct cyttsp4_core *core;
+};
+#define to_cyttsp4_device(d) container_of(d, struct cyttsp4_device, dev)
+
+struct cyttsp4_core_driver {
+ struct device_driver driver;
+ int (*probe)(struct cyttsp4_core *core);
+ int (*remove)(struct cyttsp4_core *core);
+ int (*subscribe_attention)(struct cyttsp4_device *ttsp,
+ enum cyttsp4_atten_type type,
+ cyttsp4_atten_func func,
+ int flags);
+ int (*unsubscribe_attention)(struct cyttsp4_device *ttsp,
+ enum cyttsp4_atten_type type,
+ cyttsp4_atten_func func,
+ int flags);
+ int (*request_exclusive)(struct cyttsp4_device *ttsp, int t);
+ int (*release_exclusive)(struct cyttsp4_device *ttsp);
+ int (*request_reset)(struct cyttsp4_device *ttsp);
+ int (*request_restart)(struct cyttsp4_device *ttsp);
+ int (*request_set_mode)(struct cyttsp4_device *ttsp, int mode);
+ struct cyttsp4_sysinfo *(*request_sysinfo)(struct cyttsp4_device *ttsp);
+ int (*request_handshake)(struct cyttsp4_device *ttsp, u8 mode);
+ int (*request_exec_cmd)(struct cyttsp4_device *ttsp, u8 mode,
+ u8 *cmd_buf, size_t cmd_size, u8 *return_buf,
+ size_t return_buf_size, int timeout);
+ int (*request_stop_wd)(struct cyttsp4_device *ttsp);
+ int (*request_toggle_lowpower)(struct cyttsp4_device *ttsp, u8 mode);
+ int (*write)(struct cyttsp4_device *ttsp, int mode,
+ u8 addr, const void *buf, int size);
+ int (*read)(struct cyttsp4_device *ttsp, int mode,
+ u8 addr, void *buf, int size);
+};
+#define to_cyttsp4_core_driver(d) \
+ container_of(d, struct cyttsp4_core_driver, driver)
+
+struct cyttsp4_driver {
+ struct device_driver driver;
+ int (*probe)(struct cyttsp4_device *dev);
+ int (*remove)(struct cyttsp4_device *fev);
+};
+#define to_cyttsp4_driver(d) container_of(d, struct cyttsp4_driver, driver)
+
+extern int cyttsp4_register_driver(struct cyttsp4_driver *drv);
+extern void cyttsp4_unregister_driver(struct cyttsp4_driver *drv);
+
+extern int cyttsp4_register_core_driver(struct cyttsp4_core_driver *drv);
+extern void cyttsp4_unregister_core_driver(struct cyttsp4_core_driver *drv);
+
+extern int cyttsp4_register_device(struct cyttsp4_device *pdev);
+extern void cyttsp4_unregister_device(struct cyttsp4_device *pdev);
+
+extern int cyttsp4_register_core_device(struct cyttsp4_core *pdev);
+
+extern int cyttsp4_add_adapter(char const *id, struct cyttsp4_ops const *ops,
+ struct device *parent);
+
+extern int cyttsp4_del_adapter(char const *id);
+
+static inline int cyttsp4_read(struct cyttsp4_device *ttsp, int mode, u8 addr,
+ void *buf, int size)
+{
+ struct cyttsp4_core *cd = ttsp->core;
+ struct cyttsp4_core_driver *d = to_cyttsp4_core_driver(cd->dev.driver);
+ return d->read(ttsp, mode, addr, buf, size);
+}
+
+static inline int cyttsp4_write(struct cyttsp4_device *ttsp, int mode, u8 addr,
+ const void *buf, int size)
+{
+ struct cyttsp4_core *cd = ttsp->core;
+ struct cyttsp4_core_driver *d = to_cyttsp4_core_driver(cd->dev.driver);
+ return d->write(ttsp, mode, addr, buf, size);
+}
+
+static inline int cyttsp4_adap_read(struct cyttsp4_adapter *adap, u8 addr,
+ void *buf, int size)
+{
+ return adap->read(adap, addr, buf, size);
+}
+
+static inline int cyttsp4_adap_write(struct cyttsp4_adapter *adap, u8 addr,
+ const void *buf, int size)
+{
+ return adap->write(adap, addr, buf, size);
+}
+
+static inline int cyttsp4_subscribe_attention(struct cyttsp4_device *ttsp,
+ enum cyttsp4_atten_type type, cyttsp4_atten_func func,
+ int flags)
+{
+ struct cyttsp4_core *cd = ttsp->core;
+ struct cyttsp4_core_driver *d = to_cyttsp4_core_driver(cd->dev.driver);
+ return d->subscribe_attention(ttsp, type, func, flags);
+}
+
+static inline int cyttsp4_unsubscribe_attention(struct cyttsp4_device *ttsp,
+ enum cyttsp4_atten_type type, cyttsp4_atten_func func,
+ int flags)
+{
+ struct cyttsp4_core *cd = ttsp->core;
+ struct cyttsp4_core_driver *d = to_cyttsp4_core_driver(cd->dev.driver);
+ return d->unsubscribe_attention(ttsp, type, func, flags);
+}
+
+static inline int cyttsp4_request_exclusive(struct cyttsp4_device *ttsp, int t)
+{
+ struct cyttsp4_core *cd = ttsp->core;
+ struct cyttsp4_core_driver *d = to_cyttsp4_core_driver(cd->dev.driver);
+ return d->request_exclusive(ttsp, t);
+}
+
+static inline int cyttsp4_release_exclusive(struct cyttsp4_device *ttsp)
+{
+ struct cyttsp4_core *cd = ttsp->core;
+ struct cyttsp4_core_driver *d = to_cyttsp4_core_driver(cd->dev.driver);
+ return d->release_exclusive(ttsp);
+}
+
+static inline int cyttsp4_request_reset(struct cyttsp4_device *ttsp)
+{
+ struct cyttsp4_core *cd = ttsp->core;
+ struct cyttsp4_core_driver *d = to_cyttsp4_core_driver(cd->dev.driver);
+ return d->request_reset(ttsp);
+}
+
+static inline int cyttsp4_request_restart(struct cyttsp4_device *ttsp)
+{
+ struct cyttsp4_core *cd = ttsp->core;
+ struct cyttsp4_core_driver *d = to_cyttsp4_core_driver(cd->dev.driver);
+ return d->request_restart(ttsp);
+}
+
+static inline int cyttsp4_request_set_mode(struct cyttsp4_device *ttsp,
+ int mode)
+{
+ struct cyttsp4_core *cd = ttsp->core;
+ struct cyttsp4_core_driver *d = to_cyttsp4_core_driver(cd->dev.driver);
+ return d->request_set_mode(ttsp, mode);
+}
+
+static inline struct cyttsp4_sysinfo *cyttsp4_request_sysinfo(
+ struct cyttsp4_device *ttsp)
+{
+ struct cyttsp4_core *cd = ttsp->core;
+ struct cyttsp4_core_driver *d = to_cyttsp4_core_driver(cd->dev.driver);
+ return d->request_sysinfo(ttsp);
+}
+
+static inline int cyttsp4_request_handshake(struct cyttsp4_device *ttsp,
+ u8 mode)
+{
+ struct cyttsp4_core *cd = ttsp->core;
+ struct cyttsp4_core_driver *d = to_cyttsp4_core_driver(cd->dev.driver);
+ return d->request_handshake(ttsp, mode);
+}
+
+static inline int cyttsp4_request_exec_cmd(struct cyttsp4_device *ttsp,
+ u8 mode, u8 *cmd_buf, size_t cmd_size, u8 *return_buf,
+ size_t return_buf_size, int timeout)
+{
+ struct cyttsp4_core *cd = ttsp->core;
+ struct cyttsp4_core_driver *d = to_cyttsp4_core_driver(cd->dev.driver);
+ return d->request_exec_cmd(ttsp, mode, cmd_buf, cmd_size, return_buf,
+ return_buf_size, timeout);
+}
+
+static inline int cyttsp4_request_stop_wd(struct cyttsp4_device *ttsp)
+{
+ struct cyttsp4_core *cd = ttsp->core;
+ struct cyttsp4_core_driver *d = to_cyttsp4_core_driver(cd->dev.driver);
+ return d->request_stop_wd(ttsp);
+}
+
+static inline int cyttsp4_request_toggle_lowpower(struct cyttsp4_device *ttsp,
+ u8 mode)
+{
+ struct cyttsp4_core *cd = ttsp->core;
+ struct cyttsp4_core_driver *d = to_cyttsp4_core_driver(cd->dev.driver);
+ return d->request_toggle_lowpower(ttsp, mode);
+}
+
+#endif /* _LINUX_CYTTSP4_BUS_H */
--
1.7.9.5
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