From patchwork Mon Dec 13 05:09:28 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "sim.chinyeow" X-Patchwork-Id: 404242 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id oBD5EegK015282 for ; Mon, 13 Dec 2010 05:14:41 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751119Ab0LMFOj (ORCPT ); Mon, 13 Dec 2010 00:14:39 -0500 Received: from relmlor2.renesas.com ([210.160.252.172]:51451 "EHLO relmlor2.renesas.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750974Ab0LMFOi (ORCPT ); Mon, 13 Dec 2010 00:14:38 -0500 X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter1.kernel.org [140.211.167.41]); Mon, 13 Dec 2010 05:14:41 +0000 (UTC) X-Greylist: delayed 300 seconds by postgrey-1.27 at vger.kernel.org; Mon, 13 Dec 2010 00:14:37 EST Received: from relmlir1.idc.renesas.com ([10.200.68.151]) by relmlor2.idc.renesas.com ( SJSMS) with ESMTP id <0LDC000DJOZVU8B0@relmlor2.idc.renesas.com> for linux-input@vger.kernel.org; Mon, 13 Dec 2010 14:09:31 +0900 (JST) Received: from relmlac2.idc.renesas.com ([10.200.69.22]) by relmlir1.idc.renesas.com (SJSMS) with ESMTP id <0LDC00I2IOZTAQF0@relmlir1.idc.renesas.com> for linux-input@vger.kernel.org; Mon, 13 Dec 2010 14:09:31 +0900 (JST) Received: by relmlac2.idc.renesas.com (Postfix, from userid 0) id 0D6112808F; Mon, 13 Dec 2010 14:09:31 +0900 (JST) Received: from relmlii1.idc.renesas.com [10.200.68.65] by relmlac2.idc.renesas.com with ESMTP id QAK12563; Mon, 13 Dec 2010 14:09:30 +0900 X-IronPort-AV: E=Sophos;i="4.59,334,1288537200"; d="scan'208";a="1238269" Received: from unknown (HELO PG10412) ([172.30.8.130]) by relmlii1.idc.renesas.com with ESMTP; Mon, 13 Dec 2010 14:09:28 +0900 From: chinyeow.sim.xt@renesas.com To: "'Dmitry Torokhov'" , "'Henrik Rydberg'" , linux-input@vger.kernel.org Cc: chinyeow.sim.xt@renesas.com Subject: [PATCH] Input: add ST1232 touchscreen controller driver. Date: Mon, 13 Dec 2010 14:09:28 +0900 Message-id: MIME-version: 1.0 Content-type: text/plain; charset=shift_jis Content-transfer-encoding: 7bit X-Priority: 3 (Normal) X-MSMail-priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6863 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.5994 Thread-index: Acuag+sOpt1g2MtYQ8CFokhib5NrxQ== Importance: Normal Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig index 06ea8da..3ca7700 100644 --- a/drivers/input/touchscreen/Kconfig +++ b/drivers/input/touchscreen/Kconfig @@ -681,4 +681,15 @@ config TOUCHSCREEN_STMPE To compile this driver as a module, choose M here: the module will be called stmpe-ts. +config TOUCHSCREEN_ST1232 + tristate "Sitronix ST1232 touchscreen controllers" + depends on I2C + help + Say Y here if you want to support Sitronix ST1232 + touchscreen controller. + + If unsure, say N. + + To compile this driver as a module, choose M here: the + module will be called st1232_ts. endif diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile index 7cc1b4f..718bcc8 100644 --- a/drivers/input/touchscreen/Makefile +++ b/drivers/input/touchscreen/Makefile @@ -39,6 +39,7 @@ obj-$(CONFIG_TOUCHSCREEN_PCAP) += pcap_ts.o obj-$(CONFIG_TOUCHSCREEN_PENMOUNT) += penmount.o obj-$(CONFIG_TOUCHSCREEN_QT602240) += qt602240_ts.o obj-$(CONFIG_TOUCHSCREEN_S3C2410) += s3c2410_ts.o +obj-$(CONFIG_TOUCHSCREEN_ST1232) += st1232.o obj-$(CONFIG_TOUCHSCREEN_STMPE) += stmpe-ts.o obj-$(CONFIG_TOUCHSCREEN_TNETV107X) += tnetv107x-ts.o obj-$(CONFIG_TOUCHSCREEN_TOUCHIT213) += touchit213.o diff --git a/drivers/input/touchscreen/st1232.c b/drivers/input/touchscreen/st1232.c new file mode 100644 index 0000000..bfa24ee --- /dev/null +++ b/drivers/input/touchscreen/st1232.c @@ -0,0 +1,377 @@ +/* drivers/input/touchscreen/st1232.c + * + * Copyright (C) 2010 Renesas Solutions Corp. + * Tony SIM + * + * Using code from: + * - android.git.kernel.org: projects/kernel/common.git: synaptics_i2c_rmi.c + * Copyright (C) 2007 Google, Inc. + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * 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. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define ST1232_TS_NAME "st1232-ts" + +#define XY0 0 +#define XY1 1 +#define MAX_FINGERS 2 + +#define MIN_X 0 +#define MIN_Y 0 +#define MAX_X 800 +#define MAX_Y 480 +#define MAX_AREA 0x7ff + +struct st1232_ts_data { + uint16_t addr; + struct i2c_client *client; + struct input_dev *input_dev; + int use_irq; + struct hrtimer timer; + struct work_struct work; + struct workqueue_struct *workq; + uint8_t pre_fingers_num; + uint8_t pre_is_valid[MAX_FINGERS]; +#ifdef CONFIG_HAS_EARLYSUSPEND + struct early_suspend early_suspend; +#endif +}; + +#ifdef CONFIG_HAS_EARLYSUSPEND +static void st1232_ts_early_suspend(struct early_suspend *h); +static void st1232_ts_late_resume(struct early_suspend *h); +#endif + +static void st1232_ts_work_func(struct work_struct *work) +{ + int ret; + struct i2c_msg msg[2]; + uint8_t start_reg; + uint8_t buf[8]; + struct st1232_ts_data *ts = + container_of(work, struct st1232_ts_data, work); + uint16_t x[MAX_FINGERS], y[MAX_FINGERS]; + uint8_t fingers_num, is_valid[MAX_FINGERS]; + + /* read touchscreen data from ST1232 */ + msg[0].addr = ts->client->addr; + msg[0].flags = 0; + msg[0].len = 1; + msg[0].buf = &start_reg; + start_reg = 0x10; + + msg[1].addr = ts->client->addr; + msg[1].flags = I2C_M_RD; + msg[1].len = sizeof(buf); + msg[1].buf = buf; + + ret = i2c_transfer(ts->client->adapter, msg, 2); + if (ret < 0) + goto done; + + /* get valid bit */ + is_valid[XY0] = buf[2] >> 7; + is_valid[XY1] = buf[5] >> 7; + + /* get xy coordinate */ + if (is_valid[XY0]) { + x[XY0] = ((buf[2] & 0x0070) << 4) | buf[3]; + y[XY0] = ((buf[2] & 0x0007) << 8) | buf[4]; + } + + if (is_valid[XY1]) { + x[XY1] = ((buf[5] & 0x0070) << 4) | buf[6]; + y[XY1] = ((buf[5] & 0x0007) << 8) | buf[7]; + } + + /* report single touch */ + if (ts->pre_is_valid[XY0] || is_valid[XY0]) { + input_report_key(ts->input_dev, BTN_TOUCH, is_valid[XY0]); + if (is_valid[XY0]) { + input_report_abs(ts->input_dev, ABS_X, x[XY0]); + input_report_abs(ts->input_dev, ABS_Y, y[XY0]); + } + } + + if (ts->pre_is_valid[XY1] || is_valid[XY1]) { + input_report_key(ts->input_dev, BTN_2, is_valid[XY1]); + if (is_valid[XY1]) { + input_report_abs(ts->input_dev, ABS_HAT0X, x[XY1]); + input_report_abs(ts->input_dev, ABS_HAT0Y, y[XY1]); + } + } + + /* multi touch protocol */ + fingers_num = is_valid[XY0] + is_valid[XY1]; + + if (fingers_num > 0) { + input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, MAX_AREA); + input_report_abs(ts->input_dev, ABS_MT_POSITION_X, + is_valid[XY0] ? x[XY0] : x[XY1]); + input_report_abs(ts->input_dev, ABS_MT_POSITION_Y, + is_valid[XY0] ? y[XY0] : y[XY1]); + input_mt_sync(ts->input_dev); + + if (fingers_num == MAX_FINGERS) { + input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, + MAX_AREA); + input_report_abs(ts->input_dev, ABS_MT_POSITION_X, + x[XY1]); + input_report_abs(ts->input_dev, ABS_MT_POSITION_Y, + y[XY1]); + input_mt_sync(ts->input_dev); + } + } else if ((ts->pre_fingers_num == 1) && (fingers_num == 0)) { + input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0); + input_mt_sync(ts->input_dev); + } + + /* EV_SYN */ + input_sync(ts->input_dev); + + ts->pre_fingers_num = fingers_num; + ts->pre_is_valid[XY0] = is_valid[XY0]; + ts->pre_is_valid[XY1] = is_valid[XY1]; + +done: + if (ts->use_irq) + enable_irq(ts->client->irq); + + return; +} + +static enum hrtimer_restart st1232_ts_timer_func(struct hrtimer *timer) +{ + struct st1232_ts_data *ts = + container_of(timer, struct st1232_ts_data, timer); + + pr_debug("st1232_ts_timer_func\n"); + queue_work(ts->workq, &ts->work); + hrtimer_start(&ts->timer, ktime_set(0, 12500000), HRTIMER_MODE_REL); + return HRTIMER_NORESTART; +} + +static irqreturn_t st1232_ts_irq_handler(int irq, void *dev_id) +{ + struct st1232_ts_data *ts = dev_id; + + pr_debug("st1232_ts_irq_handler\n"); + disable_irq_nosync(ts->client->irq); + queue_work(ts->workq, &ts->work); + return IRQ_HANDLED; +} + +static int st1232_ts_probe( + struct i2c_client *client, const struct i2c_device_id *id) +{ + struct st1232_ts_data *ts; + int ret; + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { + dev_err(&client->dev, "need I2C_FUNC_I2C\n"); + return -EIO; + } + + ts = kzalloc(sizeof(struct st1232_ts_data), GFP_KERNEL); + if (!ts) { + ret = -ENOMEM; + goto err_alloc_data_failed; + } + INIT_WORK(&ts->work, st1232_ts_work_func); + ts->client = client; + i2c_set_clientdata(client, ts); + + ts->input_dev = input_allocate_device(); + if (!ts->input_dev) { + ret = -ENOMEM; + dev_err(&client->dev, "Failed to allocate input device\n"); + goto err_input_dev_alloc_failed; + } + ts->input_dev->name = "st1232-touchscreen"; + + ts->workq = create_singlethread_workqueue("st1232_workq"); + if (!ts->workq) + return -ENOMEM; + + set_bit(EV_SYN, ts->input_dev->evbit); + set_bit(EV_KEY, ts->input_dev->evbit); + set_bit(BTN_TOUCH, ts->input_dev->keybit); + set_bit(BTN_2, ts->input_dev->keybit); + set_bit(EV_ABS, ts->input_dev->evbit); + + input_set_capability(ts->input_dev, EV_KEY, BTN_TOUCH); + input_set_capability(ts->input_dev, EV_KEY, BTN_2); + + input_set_abs_params(ts->input_dev, ABS_X, MIN_X, MAX_X, 0, 0); + input_set_abs_params(ts->input_dev, ABS_Y, MIN_Y, MAX_Y, 0, 0); + input_set_abs_params(ts->input_dev, ABS_HAT0X, MIN_X, MAX_X, 0, 0); + input_set_abs_params(ts->input_dev, ABS_HAT0Y, MIN_Y, MAX_Y, 0, 0); + + input_set_abs_params(ts->input_dev, ABS_MT_POSITION_X, + MIN_X, MAX_X, 0, 0); + input_set_abs_params(ts->input_dev, ABS_MT_POSITION_Y, + MIN_Y, MAX_Y, 0, 0); + input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, + 0, MAX_AREA, 0, 0); + + ret = input_register_device(ts->input_dev); + if (ret) { + dev_err(&client->dev, "Unable to register %s input device\n", + ts->input_dev->name); + goto err_input_register_device_failed; + } + if (client->irq) { + ret = request_irq(client->irq, st1232_ts_irq_handler, 0, + client->name, ts); + if (ret) + dev_err(&client->dev, "request_irq failed\n"); + else + ts->use_irq = 1; + } + + if (!ts->use_irq) { + hrtimer_init(&ts->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); + ts->timer.function = st1232_ts_timer_func; + hrtimer_start(&ts->timer, ktime_set(1, 0), HRTIMER_MODE_REL); + } +#ifdef CONFIG_HAS_EARLYSUSPEND + ts->early_suspend.level = EARLY_SUSPEND_LEVEL_BLANK_SCREEN + 1; + ts->early_suspend.suspend = st1232_ts_early_suspend; + ts->early_suspend.resume = st1232_ts_late_resume; + register_early_suspend(&ts->early_suspend); +#endif + + dev_info(&client->dev, "Start touchscreen %s in %s mode\n", + ts->input_dev->name, ts->use_irq ? "interrupt" : "polling"); + + return 0; + +err_input_register_device_failed: + input_free_device(ts->input_dev); +err_input_dev_alloc_failed: + kfree(ts); +err_alloc_data_failed: + return ret; +} + +static int st1232_ts_remove(struct i2c_client *client) +{ + struct st1232_ts_data *ts = i2c_get_clientdata(client); + +#ifdef CONFIG_HAS_EARLYSUSPEND + unregister_early_suspend(&ts->early_suspend); +#endif + + if (ts->use_irq) + free_irq(client->irq, ts); + else + hrtimer_cancel(&ts->timer); + + if (ts->workq) + destroy_workqueue(ts->workq); + + input_unregister_device(ts->input_dev); + + kfree(ts); + return 0; +} + +static int st1232_ts_suspend(struct i2c_client *client, pm_message_t mesg) +{ + int ret; + struct st1232_ts_data *ts = i2c_get_clientdata(client); + + if (ts->use_irq) + disable_irq(client->irq); + else + hrtimer_cancel(&ts->timer); + + ret = cancel_work_sync(&ts->work); + if (ret && ts->use_irq) + enable_irq(client->irq); + + return 0; +} + +static int st1232_ts_resume(struct i2c_client *client) +{ + struct st1232_ts_data *ts = i2c_get_clientdata(client); + + if (ts->use_irq) + enable_irq(client->irq); + else + hrtimer_start(&ts->timer, ktime_set(1, 0), HRTIMER_MODE_REL); + + return 0; +} + +#ifdef CONFIG_HAS_EARLYSUSPEND +static void st1232_ts_early_suspend(struct early_suspend *h) +{ + struct st1232_ts_data *ts; + ts = container_of(h, struct st1232_ts_data, early_suspend); + st1232_ts_suspend(ts->client, PMSG_SUSPEND); +} + +static void st1232_ts_late_resume(struct early_suspend *h) +{ + struct st1232_ts_data *ts; + ts = container_of(h, struct st1232_ts_data, early_suspend); + st1232_ts_resume(ts->client); +} +#endif + +static const struct i2c_device_id st1232_ts_id[] = { + { ST1232_TS_NAME, 0 }, + { } +}; + +static struct i2c_driver st1232_ts_driver = { + .probe = st1232_ts_probe, + .remove = st1232_ts_remove, +#ifndef CONFIG_HAS_EARLYSUSPEND + .suspend = st1232_ts_suspend, + .resume = st1232_ts_resume, +#endif + .id_table = st1232_ts_id, + .driver = { + .name = ST1232_TS_NAME, + }, +}; + +static int __devinit st1232_ts_init(void) +{ + return i2c_add_driver(&st1232_ts_driver); +} + +static void __exit st1232_ts_exit(void) +{ + i2c_del_driver(&st1232_ts_driver); +} + +module_init(st1232_ts_init); +module_exit(st1232_ts_exit); + +MODULE_AUTHOR("Tony SIM "); +MODULE_DESCRIPTION("SITRONIX ST1232 Touchscreen Controller Driver"); +MODULE_LICENSE("GPL");