From patchwork Fri Apr 30 14:43:31 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hemanth V X-Patchwork-Id: 95883 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.3/8.14.3) with ESMTP id o3UGoave002285 for ; Fri, 30 Apr 2010 16:50:36 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755822Ab0D3Qss (ORCPT ); Fri, 30 Apr 2010 12:48:48 -0400 Received: from bear.ext.ti.com ([192.94.94.41]:38440 "EHLO bear.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757556Ab0D3Qsn (ORCPT ); Fri, 30 Apr 2010 12:48:43 -0400 Received: from dlep35.itg.ti.com ([157.170.170.118]) by bear.ext.ti.com (8.13.7/8.13.7) with ESMTP id o3UEhYsE022357 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Fri, 30 Apr 2010 09:43:34 -0500 Received: from dbdmail.itg.ti.com (localhost [127.0.0.1]) by dlep35.itg.ti.com (8.13.7/8.13.7) with ESMTP id o3UEhTDG021405; Fri, 30 Apr 2010 09:43:30 -0500 (CDT) Received: from 10.24.255.18 (SquirrelMail authenticated user x0099946); by dbdmail.itg.ti.com with HTTP; Fri, 30 Apr 2010 20:13:31 +0530 (IST) Message-ID: <12046.10.24.255.18.1272638611.squirrel@dbdmail.itg.ti.com> Date: Fri, 30 Apr 2010 20:13:31 +0530 (IST) Subject: [RFC] [PATCH 1/2] CMA3000 Accelerometer Driver From: "Hemanth V" To: linux-input@vger.kernel.org, linux-omap@vger.kernel.org Cc: Ossi.Kauppinen@vti.fi, hemanthv@ti.com User-Agent: SquirrelMail/1.4.3a X-Mailer: SquirrelMail/1.4.3a MIME-Version: 1.0 X-Priority: 3 (Normal) Importance: Normal Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter.kernel.org [140.211.167.41]); Fri, 30 Apr 2010 16:50:42 +0000 (UTC) diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index 16ec523..4752a00 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -319,4 +319,13 @@ config INPUT_PCAP To compile this driver as a module, choose M here: the module will be called pcap_keys. +config INPUT_CMA3000_I2C + tristate "VTI CMA3000 Tri-axis accelerometer" + depends on I2C + help + Say Y here if you want to use VTI CMA3000 Accelerometer + through I2C interface. + + To compile this driver as a module, choose M here: the + module will be called cma3000_dxx endif diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile index a8b8485..94d6eda 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -30,4 +30,4 @@ obj-$(CONFIG_INPUT_WINBOND_CIR) += winbond-cir.o obj-$(CONFIG_INPUT_WISTRON_BTNS) += wistron_btns.o obj-$(CONFIG_INPUT_WM831X_ON) += wm831x-on.o obj-$(CONFIG_INPUT_YEALINK) += yealink.o - +obj-$(CONFIG_INPUT_CMA3000_I2C) += cma3000_d0x_i2c.o cma3000_d0x.o diff --git a/drivers/input/misc/cma3000_d0x.c b/drivers/input/misc/cma3000_d0x.c new file mode 100644 index 0000000..c0d0ea1 --- /dev/null +++ b/drivers/input/misc/cma3000_d0x.c @@ -0,0 +1,627 @@ +/* + * cma3000_d0x.c + * VTI CMA3000_D0x Accelerometer driver + * Supports I2C/SPI interfaces + * + * Copyright (C) 2010 Texas Instruments + * Author: Hemanth V + * + * 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. + * + * 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, see . + */ + +#include +#include +#include +#include +#include + +#include "cma3000_d0x.h" + +#define CMA3000_WHOAMI 0x00 +#define CMA3000_REVID 0x01 +#define CMA3000_CTRL 0x02 +#define CMA3000_STATUS 0x03 +#define CMA3000_RSTR 0x04 +#define CMA3000_INTSTATUS 0x05 +#define CMA3000_DOUTX 0x06 +#define CMA3000_DOUTY 0x07 +#define CMA3000_DOUTZ 0x08 +#define CMA3000_MDTHR 0x09 +#define CMA3000_MDFFTMR 0x0A +#define CMA3000_FFTHR 0x0B + +#define CMA3000_RANGE2G (1 << 7) +#define CMA3000_RANGE8G (0 << 7) +#define CMA3000_MODEMASK (7 << 1) +#define CMA3000_GRANGEMASK (1 << 7) + +#define CMA3000_STATUS_PERR 1 +#define CMA3000_INTSTATUS_FFDET (1 << 2) + +/* Settling time delay in ms */ +#define CMA3000_SETDELAY 30 + +/* Delay for clearing interrupt in us */ +#define CMA3000_INTDELAY 44 + + +/* + * Bit weights in mg for each of the seven bits, + * eight bit is the sign bit + */ +static int bit_to_2g[7] = {18, 36, 71, 143, 286, 571, 1142}; +static int bit_to_8g[7] = {71, 143, 286, 571, 1142, 2286, 4571}; + +/* + * Conversion for each of the eight modes to g, depending + * on G range i.e 2G or 8G + */ + +static int *mode_to_mg[8][2] = { + {NULL, NULL }, + {bit_to_8g, bit_to_2g}, + {bit_to_8g, bit_to_2g}, + {bit_to_8g, bit_to_8g}, + {bit_to_8g, bit_to_8g}, + {bit_to_8g, bit_to_2g}, + {bit_to_8g, bit_to_2g}, + {NULL, NULL }, +}; + +static ssize_t cma3000_show_attr_mode(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + ssize_t ret = 0; + uint8_t mode; + struct platform_device *pdev = to_platform_device(dev); + struct cma3000_accl_data *data = platform_get_drvdata(pdev); + + mode = cma3000_read(data, CMA3000_CTRL, "ctrl"); + ret = sprintf(buf, "%d\n", (mode & CMA3000_MODEMASK) >> 1); + return ret; +} + +static ssize_t cma3000_store_attr_mode(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct platform_device *pdev = to_platform_device(dev); + struct cma3000_accl_data *data = platform_get_drvdata(pdev); + unsigned long val; + int error; + uint8_t ctrl; + + error = strict_strtoul(buf, 0, &val); + if (error) + return error; + + if (val < CMAMODE_DEFAULT || val > CMAMODE_POFF) + return -EINVAL; + + mutex_lock(&data->mutex); + val &= (CMA3000_MODEMASK >> 1); + ctrl = cma3000_read(data, CMA3000_CTRL, "ctrl"); + ctrl &= ~CMA3000_MODEMASK; + ctrl |= (val << 1); + + data->pdata.mode = val; + + disable_irq(data->client->irq); + cma3000_set(data, CMA3000_CTRL, ctrl, "ctrl"); + + /* Settling time delay required after mode change */ + msleep(CMA3000_SETDELAY); + + enable_irq(data->client->irq); + mutex_unlock(&data->mutex); + + return count; +} + +static ssize_t cma3000_show_attr_grange(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + ssize_t ret = 0; + uint8_t mode; + int g_range; + + struct platform_device *pdev = to_platform_device(dev); + struct cma3000_accl_data *data = platform_get_drvdata(pdev); + + mode = cma3000_read(data, CMA3000_CTRL, "ctrl"); + g_range = (mode & CMA3000_GRANGEMASK) ? CMARANGE_2G : CMARANGE_8G; + ret = sprintf(buf, "%d\n", g_range); + + return ret; +} + +static ssize_t cma3000_store_attr_grange(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct platform_device *pdev = to_platform_device(dev); + struct cma3000_accl_data *data = platform_get_drvdata(pdev); + unsigned long val; + int error, g_range, fuzz_x, fuzz_y, fuzz_z; + uint8_t ctrl; + + error = strict_strtoul(buf, 0, &val); + if (error) + return error; + + mutex_lock(&data->mutex); + ctrl = cma3000_read(data, CMA3000_CTRL, "ctrl"); + ctrl &= ~CMA3000_GRANGEMASK; + + if (val == CMARANGE_2G) { + ctrl |= CMA3000_RANGE2G; + data->pdata.g_range = CMARANGE_2G; + } else if (val == CMARANGE_8G) { + ctrl |= CMA3000_RANGE8G; + data->pdata.g_range = CMARANGE_8G; + } else { + error = -EINVAL; + goto err_op_failed; + } + + g_range = data->pdata.g_range; + fuzz_x = data->pdata.fuzz_x; + fuzz_y = data->pdata.fuzz_y; + fuzz_z = data->pdata.fuzz_z; + + disable_irq(data->client->irq); + cma3000_set(data, CMA3000_CTRL, ctrl, "ctrl"); + + input_set_abs_params(data->input_dev, ABS_X, -g_range, + g_range, fuzz_x, 0); + input_set_abs_params(data->input_dev, ABS_Y, -g_range, + g_range, fuzz_y, 0); + input_set_abs_params(data->input_dev, ABS_Z, -g_range, + g_range, fuzz_z, 0); + + enable_irq(data->client->irq); + mutex_unlock(&data->mutex); + + return count; + +err_op_failed: + mutex_unlock(&data->mutex); + return error; +} + +static ssize_t cma3000_show_attr_mdthr(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + ssize_t ret = 0; + uint8_t mode; + + struct platform_device *pdev = to_platform_device(dev); + struct cma3000_accl_data *data = platform_get_drvdata(pdev); + + mode = cma3000_read(data, CMA3000_MDTHR, "mdthr"); + ret = sprintf(buf, "%d\n", mode); + + return ret; +} + +static ssize_t cma3000_store_attr_mdthr(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct platform_device *pdev = to_platform_device(dev); + struct cma3000_accl_data *data = platform_get_drvdata(pdev); + unsigned long val; + int error; + + error = strict_strtoul(buf, 0, &val); + if (error) + return error; + + mutex_lock(&data->mutex); + data->pdata.mdthr = val; + + disable_irq(data->client->irq); + cma3000_set(data, CMA3000_MDTHR, val, "mdthr"); + enable_irq(data->client->irq); + mutex_unlock(&data->mutex); + + return count; +} + +static ssize_t cma3000_show_attr_mdfftmr(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + ssize_t ret = 0; + uint8_t mode; + + struct platform_device *pdev = to_platform_device(dev); + struct cma3000_accl_data *data = platform_get_drvdata(pdev); + + mode = cma3000_read(data, CMA3000_MDFFTMR, "mdfftmr"); + ret = sprintf(buf, "%d\n", mode); + + return ret; +} + +static ssize_t cma3000_store_attr_mdfftmr(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct platform_device *pdev = to_platform_device(dev); + struct cma3000_accl_data *data = platform_get_drvdata(pdev); + unsigned long val; + int error; + + error = strict_strtoul(buf, 0, &val); + if (error) + return error; + + mutex_lock(&data->mutex); + data->pdata.mdfftmr = val; + + disable_irq(data->client->irq); + cma3000_set(data, CMA3000_MDFFTMR, val, "mdthr"); + enable_irq(data->client->irq); + mutex_unlock(&data->mutex); + + return count; +} + +static ssize_t cma3000_show_attr_ffthr(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + ssize_t ret = 0; + uint8_t mode; + + struct platform_device *pdev = to_platform_device(dev); + struct cma3000_accl_data *data = platform_get_drvdata(pdev); + + mode = cma3000_read(data, CMA3000_FFTHR, "ffthr"); + ret = sprintf(buf, "%d\n", mode); + + return ret; +} + +static ssize_t cma3000_store_attr_ffthr(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + struct platform_device *pdev = to_platform_device(dev); + struct cma3000_accl_data *data = platform_get_drvdata(pdev); + unsigned long val; + int error; + + error = strict_strtoul(buf, 0, &val); + if (error) + return error; + + mutex_lock(&data->mutex); + data->pdata.ffthr = val; + + disable_irq(data->client->irq); + cma3000_set(data, CMA3000_FFTHR, val, "mdthr"); + enable_irq(data->client->irq); + mutex_unlock(&data->mutex); + + return count; +} + +static DEVICE_ATTR(mode, S_IWUSR | S_IRUGO, + cma3000_show_attr_mode, cma3000_store_attr_mode); + +static DEVICE_ATTR(grange, S_IWUSR | S_IRUGO, + cma3000_show_attr_grange, cma3000_store_attr_grange); + +static DEVICE_ATTR(mdthr, S_IWUSR | S_IRUGO, + cma3000_show_attr_mdthr, cma3000_store_attr_mdthr); + +static DEVICE_ATTR(mdfftmr, S_IWUSR | S_IRUGO, + cma3000_show_attr_mdfftmr, cma3000_store_attr_mdfftmr); + +static DEVICE_ATTR(ffthr, S_IWUSR | S_IRUGO, + cma3000_show_attr_ffthr, cma3000_store_attr_ffthr); + + +static struct attribute *cma_attrs[] = { + &dev_attr_mode.attr, + &dev_attr_grange.attr, + &dev_attr_mdthr.attr, + &dev_attr_mdfftmr.attr, + &dev_attr_ffthr.attr, + NULL, +}; + +static struct attribute_group cma3000_attr_group = { + .attrs = cma_attrs, +}; + +static void cma3000_create_sysfs(struct cma3000_accl_data *data) +{ + int ret; + ret = sysfs_create_group(&data->client->dev.kobj, &cma3000_attr_group); + if (ret) + dev_err(&data->client->dev, + "failed to create sysfs entries\n"); + +} + +static void cma3000_remove_sysfs(struct cma3000_accl_data *data) +{ + sysfs_remove_group(&data->client->dev.kobj, &cma3000_attr_group); +} + +static void decode_mg(struct cma3000_accl_data *data, int *datax, + int *datay, int *dataz) +{ + int i, tmpx = 0, tmpy = 0, tmpz = 0; + + for (i = 0; i < 7; ++i) { + tmpx += (((*datax) & BIT(i)) >> i) * (data->bit_to_mg[i]); + tmpy += (((*datay) & BIT(i)) >> i) * (data->bit_to_mg[i]); + tmpz += (((*dataz) & BIT(i)) >> i) * (data->bit_to_mg[i]); + + } + + if ((*datax) & BIT(7)) + *datax = -tmpx; + else + *datax = tmpx; + + if ((*datay) & BIT(7)) + *datay = -tmpy; + else + *datay = tmpy; + + if ((*dataz) & BIT(7)) + *dataz = -tmpz; + else + *dataz = tmpz; +} + +static irqreturn_t cma3000_thread_irq(int irq, void *dev_id) +{ + struct cma3000_accl_data *data = dev_id; + int datax, datay, dataz; + u8 ctrl, mode, range, intr_status; + + intr_status = cma3000_read(data, CMA3000_INTSTATUS, "interrupt status"); + + /* Check if free fall is detected, report immediately */ + if (intr_status & CMA3000_INTSTATUS_FFDET) { + input_report_abs(data->input_dev, ABS_MISC, 1); + input_sync(data->input_dev); + } else { + input_report_abs(data->input_dev, ABS_MISC, 0); + } + + + /* Delay required between each read for interrupt clearing */ + datax = cma3000_read(data, CMA3000_DOUTX, "X"); + udelay(CMA3000_INTDELAY); + datay = cma3000_read(data, CMA3000_DOUTY, "Y"); + udelay(CMA3000_INTDELAY); + dataz = cma3000_read(data, CMA3000_DOUTZ, "Z"); + + ctrl = cma3000_read(data, CMA3000_CTRL, "ctrl"); + mode = (ctrl & CMA3000_MODEMASK) >> 1; + range = (ctrl & CMA3000_GRANGEMASK) >> 7; + + data->bit_to_mg = mode_to_mg[mode][range]; + + /* Interrupt not for this device */ + if (data->bit_to_mg == NULL) + return IRQ_NONE; + + /* Decode register values to milli g */ + decode_mg(data, &datax, &datay, &dataz); + + input_report_abs(data->input_dev, ABS_X, datax); + input_report_abs(data->input_dev, ABS_Y, datay); + input_report_abs(data->input_dev, ABS_Z, dataz); + input_sync(data->input_dev); + + return IRQ_HANDLED; +} + +static int cma3000_reset(struct cma3000_accl_data *data) +{ + int ret; + + /* Reset sequence */ + cma3000_set(data, CMA3000_RSTR, 0x02, "Reset"); + cma3000_set(data, CMA3000_RSTR, 0x0A, "Reset"); + cma3000_set(data, CMA3000_RSTR, 0x04, "Reset"); + + /* Settling time delay */ + mdelay(10); + + ret = cma3000_read(data, CMA3000_STATUS, "Status"); + if ((ret < 0) || (ret & CMA3000_STATUS_PERR)) { + dev_err(&data->client->dev, "Reset failed\n"); + return -EIO; + } + + return 0; +} + +int cma3000_poweron(struct cma3000_accl_data *data) +{ + uint8_t ctrl = 0, mdthr, mdfftmr, ffthr, mode; + int g_range, ret; + + g_range = data->pdata.g_range; + mode = data->pdata.mode; + mdthr = data->pdata.mdthr; + mdfftmr = data->pdata.mdfftmr; + ffthr = data->pdata.ffthr; + + if (mode < CMAMODE_DEFAULT || mode > CMAMODE_POFF) { + data->pdata.mode = CMAMODE_MOTDET; + mode = data->pdata.mode; + dev_info(&data->client->dev, + "Invalid mode specified, assuming Motion Detect\n"); + } + + if (g_range == CMARANGE_2G) { + ctrl = (mode << 1) | CMA3000_RANGE2G; + } else if (g_range == CMARANGE_8G) { + ctrl = (mode << 1) | CMA3000_RANGE8G; + } else { + dev_info(&data->client->dev, + "Invalid G range specified, assuming 8G\n"); + ctrl = (mode << 1) | CMA3000_RANGE8G; + data->pdata.g_range = CMARANGE_8G; + } + + + cma3000_set(data, CMA3000_MDTHR, mdthr, "Motion Detect Threshold"); + cma3000_set(data, CMA3000_MDFFTMR, mdfftmr, "Time register"); + cma3000_set(data, CMA3000_FFTHR, ffthr, "Free fall threshold"); + ret = cma3000_set(data, CMA3000_CTRL, ctrl, "Mode setting"); + if (ret < 0) + return -EIO; + + mdelay(CMA3000_SETDELAY); + + return 0; +} + +int cma3000_poweroff(struct cma3000_accl_data *data) +{ + int ret; + + ret = cma3000_set(data, CMA3000_CTRL, CMAMODE_POFF, "Mode setting"); + mdelay(CMA3000_SETDELAY); + + return ret; +} + +int cma3000_init(struct cma3000_accl_data *data) +{ + int ret = 0, fuzz_x, fuzz_y, fuzz_z, g_range; + uint32_t irqflags; + + if (data->client->dev.platform_data == NULL) { + dev_err(&data->client->dev, "platform data not found \n"); + goto err_op2_failed; + } + + memcpy(&(data->pdata), data->client->dev.platform_data, + sizeof(struct cma3000_platform_data)); + + ret = cma3000_reset(data); + if (ret) + goto err_op2_failed; + + ret = cma3000_read(data, CMA3000_REVID, "Revid"); + if (ret < 0) + goto err_op2_failed; + + pr_info("CMA3000 Acclerometer : Revision %x\n", ret); + + /* Bring it out of default power down state */ + ret = cma3000_poweron(data); + if (ret < 0) + goto err_op2_failed; + + fuzz_x = data->pdata.fuzz_x; + fuzz_y = data->pdata.fuzz_y; + fuzz_z = data->pdata.fuzz_z; + g_range = data->pdata.g_range; + irqflags = data->pdata.irqflags; + + data->input_dev = input_allocate_device(); + if (data->input_dev == NULL) { + ret = -ENOMEM; + dev_err(&data->client->dev, + "Failed to allocate input device\n"); + goto err_op2_failed; + } + + data->input_dev->name = "cma3000-acclerometer"; + +#ifdef CONFIG_INPUT_CMA3000_I2C + data->input_dev->id.bustype = BUS_I2C; +#endif + + __set_bit(EV_ABS, data->input_dev->evbit); + __set_bit(EV_MSC, data->input_dev->evbit); + + input_set_abs_params(data->input_dev, ABS_X, -g_range, + g_range, fuzz_x, 0); + input_set_abs_params(data->input_dev, ABS_Y, -g_range, + g_range, fuzz_y, 0); + input_set_abs_params(data->input_dev, ABS_Z, -g_range, + g_range, fuzz_z, 0); + input_set_abs_params(data->input_dev, ABS_MISC, 0, + 1, 0, 0); + + ret = input_register_device(data->input_dev); + if (ret) { + dev_err(&data->client->dev, + "Unable to register input device\n"); + goto err_op2_failed; + } + + mutex_init(&data->mutex); + + if (data->client->irq) { + ret = request_threaded_irq(data->client->irq, NULL, + cma3000_thread_irq, + irqflags | IRQF_ONESHOT, + data->client->name, data); + + if (ret < 0) { + dev_err(&data->client->dev, + "request_threaded_irq failed\n"); + goto err_op1_failed; + } + } + + cma3000_create_sysfs(data); + + return 0; + +err_op1_failed: + mutex_destroy(&data->mutex); + input_unregister_device(data->input_dev); +err_op2_failed: + if (data != NULL) { + if (data->input_dev != NULL) + input_free_device(data->input_dev); + } + + return ret; +} + +int cma3000_exit(struct cma3000_accl_data *data) +{ + int ret; + + ret = cma3000_poweroff(data); + + if (data->client->irq) + free_irq(data->client->irq, data); + + mutex_destroy(&data->mutex); + input_unregister_device(data->input_dev); + input_free_device(data->input_dev); + cma3000_remove_sysfs(data); + + return ret; +} diff --git a/drivers/input/misc/cma3000_d0x.h b/drivers/input/misc/cma3000_d0x.h new file mode 100644 index 0000000..906d29e --- /dev/null +++ b/drivers/input/misc/cma3000_d0x.h @@ -0,0 +1,46 @@ +/* + * cma3000_d0x.h + * VTI CMA3000_D0x Accelerometer driver + * + * Copyright (C) 2010 Texas Instruments + * Author: Hemanth V + * + * 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. + * + * 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, see . + */ + +#ifndef INPUT_CMA3000_H +#define INPUT_CMA3000_H + +#include +#include + +struct cma3000_accl_data { +#ifdef CONFIG_INPUT_CMA3000_I2C + struct i2c_client *client; +#endif + struct input_dev *input_dev; + struct cma3000_platform_data pdata; + + /* mutex for sysfs operations */ + struct mutex mutex; + int *bit_to_mg; +}; + +int cma3000_set(struct cma3000_accl_data *, u8, u8, char *); +int cma3000_read(struct cma3000_accl_data *, u8, char *); +int cma3000_init(struct cma3000_accl_data *); +int cma3000_exit(struct cma3000_accl_data *); +int cma3000_poweron(struct cma3000_accl_data *); +int cma3000_poweroff(struct cma3000_accl_data *); + +#endif diff --git a/drivers/input/misc/cma3000_d0x_i2c.c b/drivers/input/misc/cma3000_d0x_i2c.c new file mode 100644 index 0000000..d2ad638 --- /dev/null +++ b/drivers/input/misc/cma3000_d0x_i2c.c @@ -0,0 +1,136 @@ +/* + * cma3000_d0x_i2c.c + * + * Implements I2C interface for VTI CMA300_D0x Accelerometer driver + * + * Copyright (C) 2010 Texas Instruments + * Author: Hemanth V + * + * 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. + * + * 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, see . + */ + +#include +#include +#include +#include "cma3000_d0x.h" + +int cma3000_set(struct cma3000_accl_data *accl, u8 reg, u8 val, char *msg) +{ + int ret = i2c_smbus_write_byte_data(accl->client, reg, val); + if (ret < 0) + dev_err(&accl->client->dev, + "i2c_smbus_write_byte_data failed (%s)\n", msg); + return ret; +} + +int cma3000_read(struct cma3000_accl_data *accl, u8 reg, char *msg) +{ + int ret = i2c_smbus_read_byte_data(accl->client, reg); + if (ret < 0) + dev_err(&accl->client->dev, + "i2c_smbus_read_byte_data failed (%s)\n", msg); + return ret; +} + +static int __devinit cma3000_accl_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + int ret; + struct cma3000_accl_data *data = NULL; + + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (data == NULL) { + ret = -ENOMEM; + goto err_op_failed; + } + + data->client = client; + i2c_set_clientdata(client, data); + + ret = cma3000_init(data); + if (ret) + goto err_op_failed; + + return 0; + +err_op_failed: + + if (data != NULL) + kfree(data); + + return ret; +} + +static int __devexit cma3000_accl_remove(struct i2c_client *client) +{ + struct cma3000_accl_data *data = i2c_get_clientdata(client); + int ret; + + ret = cma3000_exit(data); + i2c_set_clientdata(client, NULL); + kfree(data); + + return ret; +} + +#ifdef CONFIG_PM +static int cma3000_accl_suspend(struct i2c_client *client, pm_message_t mesg) +{ + struct cma3000_accl_data *data = i2c_get_clientdata(client); + + return cma3000_poweroff(data); +} + +static int cma3000_accl_resume(struct i2c_client *client) +{ + struct cma3000_accl_data *data = i2c_get_clientdata(client); + + return cma3000_poweron(data); +} +#endif + +static const struct i2c_device_id cma3000_id[] = { + { "cma3000_accl", 0 }, + { }, +}; + +static struct i2c_driver cma3000_accl_driver = { + .probe = cma3000_accl_probe, + .remove = cma3000_accl_remove, + .id_table = cma3000_id, +#ifdef CONFIG_PM + .suspend = cma3000_accl_suspend, + .resume = cma3000_accl_resume, +#endif + .driver = { + .name = "cma3000_accl" + }, +}; + +static int __init cma3000_accl_init(void) +{ + + return i2c_add_driver(&cma3000_accl_driver); +} + +static void __exit cma3000_accl_exit(void) +{ + i2c_del_driver(&cma3000_accl_driver); +} + +module_init(cma3000_accl_init); +module_exit(cma3000_accl_exit); + +MODULE_DESCRIPTION("CMA3000-D0x Accelerometer Driver"); +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Hemanth V "); diff --git a/include/linux/i2c/cma3000.h b/include/linux/i2c/cma3000.h new file mode 100644 index 0000000..50aa3fc --- /dev/null +++ b/include/linux/i2c/cma3000.h @@ -0,0 +1,60 @@ +/* + * cma3000.h + * VTI CMA300_Dxx Accelerometer driver + * + * Copyright (C) 2010 Texas Instruments + * Author: Hemanth V + * + * 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. + * + * 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, see . + */ + +#ifndef _LINUX_CMA3000_I2C_H +#define _LINUX_CMA3000_I2C_H + +#define CMAMODE_DEFAULT 0 +#define CMAMODE_MEAS100 1 +#define CMAMODE_MEAS400 2 +#define CMAMODE_MEAS40 3 +#define CMAMODE_MOTDET 4 +#define CMAMODE_FF100 5 +#define CMAMODE_FF400 6 +#define CMAMODE_POFF 7 + +#define CMARANGE_2G 2000 +#define CMARANGE_8G 8000 + +/** + * struct cma3000_i2c_platform_data - CMA3000 Platform data + * @fuzz_x: Noise on X Axis + * @fuzz_y: Noise on Y Axis + * @fuzz_z: Noise on Z Axis + * @g_range: G range in milli g i.e 2000 or 8000 + * @mode: Operating mode + * @mdthr: Motion detect threshold value + * @mdfftmr: Motion detect and free fall time value + * @ffthr: Free fall threshold value + */ + +struct cma3000_platform_data { + int fuzz_x; + int fuzz_y; + int fuzz_z; + int g_range; + uint8_t mode; + uint8_t mdthr; + uint8_t mdfftmr; + uint8_t ffthr; + uint32_t irqflags; +}; + +#endif