From patchwork Fri Sep 14 17:48:36 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ferruh Yigit X-Patchwork-Id: 1459851 Return-Path: X-Original-To: patchwork-linux-input@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id 28C89DF280 for ; Fri, 14 Sep 2012 17:49:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758404Ab2INRtN (ORCPT ); Fri, 14 Sep 2012 13:49:13 -0400 Received: from relay.ihostexchange.net ([66.46.182.53]:10485 "EHLO relay.ihostexchange.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757706Ab2INRtM convert rfc822-to-8bit (ORCPT ); Fri, 14 Sep 2012 13:49:12 -0400 Received: from ferruhy-laptop.irdesign.cypress.com (193.120.204.228) by smtp.ihostexchange.net (66.46.182.50) with Microsoft SMTP Server (TLS) id 8.3.213.0; Fri, 14 Sep 2012 13:49:10 -0400 From: Ferruh Yigit To: Dmitry Torokhov CC: Kevin McNeely , Phil Warkentin , Ferruh Yigit , Javier Martinez Canillas , Henrik Rydberg , Shawn Landden , Ashish Jangam , Olivier Sobrie , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 2/3] Input: cyttsp4 - I2C driver for Cypress TMA4XX touchscreen devices Date: Fri, 14 Sep 2012 20:48:36 +0300 Message-ID: <1347644917-13269-3-git-send-email-fery@cypress.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1347644917-13269-1-git-send-email-fery@cypress.com> References: <1347644917-13269-1-git-send-email-fery@cypress.com> MIME-Version: 1.0 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Cypress TrueTouch(tm) Standard Product controllers, Generation4 devices, I2C adapter module. This driver adds communication support with TTSP controller using I2C bus. Signed-off-by: Ferruh Yigit --- drivers/input/touchscreen/Kconfig | 12 ++ drivers/input/touchscreen/Makefile | 3 + drivers/input/touchscreen/cyttsp4_i2c.c | 191 +++++++++++++++++++++++++++++++ drivers/input/touchscreen/cyttsp4_i2c.h | 34 ++++++ 4 files changed, 240 insertions(+) create mode 100644 drivers/input/touchscreen/cyttsp4_i2c.c create mode 100644 drivers/input/touchscreen/cyttsp4_i2c.h -- 1.7.9.5 This message and any attachments may contain Cypress (or its subsidiaries) confidential information. If it has been received in error, please advise the sender and immediately delete this message. -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig index d6ebd4c..fcc1c82 100644 --- a/drivers/input/touchscreen/Kconfig +++ b/drivers/input/touchscreen/Kconfig @@ -212,6 +212,18 @@ config TOUCHSCREEN_CYPRESS_CYTTSP4_VDEBUG Say Y here to enable verbose debug output. +config TOUCHSCREEN_CYPRESS_CYTTSP4_I2C + tristate "Cypress TrueTouch Gen4 I2C" + depends on TOUCHSCREEN_CYPRESS_CYTTSP4 + depends on I2C + default n + help + Cypress TrueTouch(tm) Standard Product Generation4 + I2C bus interface. + + Say Y here to enable I2C bus interface to TTSP + touchscreen controller. + 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 1cdab28..8f5e8ff 100644 --- a/drivers/input/touchscreen/Makefile +++ b/drivers/input/touchscreen/Makefile @@ -74,10 +74,13 @@ obj-$(CONFIG_TOUCHSCREEN_WM97XX_ZYLONITE) += zylonite-wm97xx.o obj-$(CONFIG_TOUCHSCREEN_W90X900) += w90p910_ts.o obj-$(CONFIG_TOUCHSCREEN_TPS6507X) += tps6507x-ts.o obj-$(CONFIG_TOUCHSCREEN_CYPRESS_CYTTSP4) += cyttsp4_core.o +obj-$(CONFIG_TOUCHSCREEN_CYPRESS_CYTTSP4_I2C) += cyttsp4_i2c.o ifeq ($(CONFIG_TOUCHSCREEN_CYPRESS_CYTTSP4_DEBUG),y) CFLAGS_cyttsp4_core.o += -DDEBUG +CFLAGS_cyttsp4_i2c.o += -DDEBUG endif ifeq ($(CONFIG_TOUCHSCREEN_CYPRESS_CYTTSP4_VDEBUG),y) CFLAGS_cyttsp4_core.o += -DVERBOSE_DEBUG +CFLAGS_cyttsp4_i2c.o += -DVERBOSE_DEBUG endif diff --git a/drivers/input/touchscreen/cyttsp4_i2c.c b/drivers/input/touchscreen/cyttsp4_i2c.c new file mode 100644 index 0000000..0faf0f7 --- /dev/null +++ b/drivers/input/touchscreen/cyttsp4_i2c.c @@ -0,0 +1,191 @@ +/* + * cyttsp4_i2c.c + * Cypress TrueTouch(TM) Standard Product V4 I2C Driver module. + * Supported parts include: + * TMA4XX + * TMA1036 + * + * Copyright (C) 2012 Cypress Semiconductor + * + * 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 + * + */ + +#include +#include +#include +#include +#include +#include "cyttsp4_core.h" +#include "cyttsp4_i2c.h" + +#define CY_I2C_DATA_SIZE 256 + +static int cyttsp4_i2c_read_block_data(struct i2c_client *client, u8 addr, + size_t length, void *values) +{ + int rc; + + /* write addr */ + rc = i2c_master_send(client, &addr, sizeof(addr)); + if (rc < 0) + return rc; + else if (rc != sizeof(addr)) + return -EIO; + + /* read data */ + rc = i2c_master_recv(client, values, length); + + return (rc < 0) ? rc : rc != length ? -EIO : 0; +} + +static int cyttsp4_i2c_write_block_data(struct i2c_client *client, u8 addr, + size_t length, const void *values) +{ + int rc; + u8 *wr_buf = cyttsp4_get_xfer_buf(&client->dev); + + if (length + 1 > CY_I2C_DATA_SIZE) + return -EINVAL; + + wr_buf[0] = addr; + memcpy(&wr_buf[1], values, length); + length += 1; + + /* write data */ + rc = i2c_master_send(client, wr_buf, length); + + return (rc < 0) ? rc : rc != length ? -EIO : 0; +} + +static int cyttsp4_i2c_write(struct device *dev, u8 addr, + const void *buf, int size) +{ + struct i2c_client *client = to_i2c_client(dev); + int rc; + + rc = cyttsp4_i2c_write_block_data(client, addr, size, buf); + + return rc; +} + +static int cyttsp4_i2c_read(struct device *dev, u8 addr, + void *buf, int size) +{ + struct i2c_client *client = to_i2c_client(dev); + int rc; + + rc = cyttsp4_i2c_read_block_data(client, addr, size, buf); + + return rc; +} + +static struct cyttsp4_bus_ops ops = { + .bustype = BUS_I2C, + .write = cyttsp4_i2c_write, + .read = cyttsp4_i2c_read, +}; + +static int __devinit cyttsp4_i2c_probe(struct i2c_client *client, + const struct i2c_device_id *i2c_id) +{ + struct device *dev = &client->dev; + u8 *xfer_buf; + int rc; + + dev_info(dev, "%s: Starting %s probe...\n", __func__, CYTTSP4_I2C_NAME); + + dev_dbg(dev, "%s: debug on\n", __func__); + dev_vdbg(dev, "%s: verbose debug on\n", __func__); + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { + dev_err(dev, "%s: fail check I2C functionality\n", __func__); + return -EIO; + } + + xfer_buf = kmalloc(CY_I2C_DATA_SIZE, GFP_KERNEL); + if (!xfer_buf) { + dev_err(dev, "%s: Error, kmalloc\n", __func__); + return -ENOMEM; + } + + client->dev.bus = &i2c_bus_type; + + rc = cyttsp4_probe(dev, &ops, xfer_buf); + if (rc) { + dev_err(dev, "%s: Error on probe %s\n", __func__, + CYTTSP4_I2C_NAME); + goto probe_err; + } + + dev_info(dev, "%s: Successful probe %s\n", __func__, CYTTSP4_I2C_NAME); + + return 0; + +probe_err: + kfree(xfer_buf); + return rc; +} + +static int __devexit cyttsp4_i2c_remove(struct i2c_client *client) +{ + struct device *dev = &client->dev; + u8 *xfer_buf = cyttsp4_get_xfer_buf(dev); + + dev_info(dev, "%s\n", __func__); + cyttsp4_remove(dev); + kfree(xfer_buf); + return 0; +} + +static const struct i2c_device_id cyttsp4_i2c_id[] = { + { CYTTSP4_I2C_NAME, 0 }, { } +}; + +static struct i2c_driver cyttsp4_i2c_driver = { + .driver = { + .name = CYTTSP4_I2C_NAME, + .owner = THIS_MODULE, + .pm = &cyttsp4_pm_ops, + }, + .probe = cyttsp4_i2c_probe, + .remove = __devexit_p(cyttsp4_i2c_remove), + .id_table = cyttsp4_i2c_id, +}; + +static int __init cyttsp4_i2c_init(void) +{ + int rc = i2c_add_driver(&cyttsp4_i2c_driver); + + pr_info("%s: Cypress TTSP I2C Touchscreen Driver (Built %s) rc=%d\n", + __func__, CY_DRIVER_DATE, rc); + return rc; +} +module_init(cyttsp4_i2c_init); + +static void __exit cyttsp4_i2c_exit(void) +{ + i2c_del_driver(&cyttsp4_i2c_driver); + pr_info("%s: module exit\n", __func__); +} +module_exit(cyttsp4_i2c_exit); + +MODULE_ALIAS(CYTTSP4_I2C_NAME); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) I2C driver"); +MODULE_AUTHOR("Cypress"); +MODULE_DEVICE_TABLE(i2c, cyttsp4_i2c_id); diff --git a/drivers/input/touchscreen/cyttsp4_i2c.h b/drivers/input/touchscreen/cyttsp4_i2c.h new file mode 100644 index 0000000..5137102 --- /dev/null +++ b/drivers/input/touchscreen/cyttsp4_i2c.h @@ -0,0 +1,34 @@ +/* + * cyttsp4_i2c.h + * Cypress TrueTouch(TM) Standard Product V4 I2C driver module. + * For use with Cypress Txx4xx parts. + * Supported parts include: + * TMA4XX + * TMA1036 + * + * Copyright (C) 2012 Cypress Semiconductor + * + * 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 + * + */ + +#ifndef _LINUX_CYTTSP4_I2C_H +#define _LINUX_CYTTSP4_I2C_H + +#define CYTTSP4_I2C_NAME "cyttsp4_i2c_adapter" + +#endif /* _LINUX_CYTTSP4_I2C_H */