From patchwork Tue Nov 10 23:11:21 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: chudson@kionix.com X-Patchwork-Id: 59211 Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by demeter.kernel.org (8.14.2/8.14.2) with ESMTP id nAANHmkk005789 for ; Tue, 10 Nov 2009 23:17:48 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758634AbZKJXRm (ORCPT ); Tue, 10 Nov 2009 18:17:42 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758637AbZKJXRl (ORCPT ); Tue, 10 Nov 2009 18:17:41 -0500 Received: from barracuda.kionix.com ([205.232.90.213]:34315 "EHLO mail.kionix.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1758634AbZKJXRk (ORCPT ); Tue, 10 Nov 2009 18:17:40 -0500 X-Greylist: delayed 397 seconds by postgrey-1.27 at vger.kernel.org; Tue, 10 Nov 2009 18:17:40 EST Received: (qmail 9781 invoked from network); 10 Nov 2009 22:52:14 -0000 Received: from unknown (HELO localhost.localdomain) (10.0.1.131) by 10.0.0.125 with SMTP; 10 Nov 2009 22:52:14 -0000 From: chudson@kionix.com To: linux-omap@vger.kernel.org Cc: dmitry.torokhov@gmail.com, linux-input@vger.kernel.org, Chris Hudson Subject: [RFC PATCH v2 1/3] input:misc:driver support for Kionix kxte9 accelerometer Date: Tue, 10 Nov 2009 18:11:21 -0500 Message-Id: <1257894683-1213-1-git-send-email-chudson@kionix.com> X-Mailer: git-send-email 1.5.4.3 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index a9bb254..a9f957d 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -317,4 +317,15 @@ config INPUT_PCAP To compile this driver as a module, choose M here: the module will be called pcap_keys. +config INPUT_KXTE9 + tristate "Kionix KXTE9 tri-axis digital accelerometer" + depends on I2C && SYSFS + help + If you say yes here you get support for the Kionix KXTE9 digital + tri-axis accelerometer. + + This driver can also be built as a module. If so, the module + will be called kxte9. + + endif diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile index a8b8485..010d19b 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -15,6 +15,7 @@ obj-$(CONFIG_INPUT_DM355EVM) += dm355evm_keys.o obj-$(CONFIG_HP_SDC_RTC) += hp_sdc_rtc.o obj-$(CONFIG_INPUT_IXP4XX_BEEPER) += ixp4xx-beeper.o obj-$(CONFIG_INPUT_KEYSPAN_REMOTE) += keyspan_remote.o +obj-$(CONFIG_SENSORS_KXTE9) += kxte9.o obj-$(CONFIG_INPUT_M68K_BEEP) += m68kspkr.o obj-$(CONFIG_INPUT_PCAP) += pcap_keys.o obj-$(CONFIG_INPUT_PCF50633_PMU) += pcf50633-input.o diff --git a/drivers/input/misc/kxte9.c b/drivers/input/misc/kxte9.c new file mode 100644 index 0000000..d470f02 --- /dev/null +++ b/drivers/input/misc/kxte9.c @@ -0,0 +1,980 @@ +/* + * Copyright (C) 2009 Kionix, Inc. + * Written by Chris Hudson + * + * 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, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + * 02111-1307, USA + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define NAME "kxte9" +#define G_MAX 2000 +/* OUTPUT REGISTERS */ +#define XOUT 0x12 +#define INT_STATUS_REG 0x16 +#define INT_SRC_REG2 0x17 +#define TILT_POS_CUR 0x10 +#define TILT_POS_PRE 0x11 +#define INT_REL 0x1A +/* CONTROL REGISTERS */ +#define CTRL_REG1 0x1B +#define CTRL_REG3 0x1D +#define INT_CTRL1 0x1E +#define TILT_TIMER 0x28 +#define WUF_TIMER 0x29 +#define B2S_TIMER 0x2A +#define WUF_THRESH 0x5A +#define B2S_THRESH 0x5B +/* CONTROL REGISTER 1 BITS */ +#define PC1_OFF 0x00 +#define PC1_ON 0x80 +/* INTERRUPT SOURCE 1 BITS */ +#define TPS 0x01 +#define WUFS 0x02 +#define B2SS 0x04 +/* INPUT_ABS CONSTANTS */ +#define FUZZ 32 +#define FLAT 32 +#define I2C_RETRY_DELAY 5 +#define I2C_RETRIES 5 +/* RESUME STATE INDICES */ +#define RES_CTRL_REG1 0 +#define RES_CTRL_REG3 1 +#define RES_INT_CTRL1 2 +#define RES_TILT_TIMER 3 +#define RES_WUF_TIMER 4 +#define RES_B2S_TIMER 5 +#define RES_WUF_THRESH 6 +#define RES_B2S_THRESH 7 +#define RES_INTERVAL 8 +#define RES_CURRENT_ODR 9 +#define RESUME_ENTRIES 10 + +struct { + unsigned int cutoff; + u8 mask; +} kxte9_odr_table[] = { + { + 25, ODR125}, { + 100, ODR40}, { + 334, ODR10}, { + 1000, ODR3}, { + 0, ODR1},}; + +struct kxte9_data { + struct i2c_client *client; + struct kxte9_platform_data *pdata; + struct mutex lock; + struct delayed_work input_work; + struct input_dev *input_dev; + struct work_struct irq_work; + struct workqueue_struct *irq_work_queue; + + int hw_initialized; + atomic_t enabled; + u8 resume_state[RESUME_ENTRIES]; + int irq; +}; + +static struct kxte9_data *kxte9_misc_data; + +static int kxte9_i2c_read(struct kxte9_data *te9, u8 *buf, int len) +{ + int err; + int tries = 0; + + struct i2c_msg msgs[] = { + { + .addr = te9->client->addr, + .flags = te9->client->flags & I2C_M_TEN, + .len = 1, + .buf = buf, + }, + { + .addr = te9->client->addr, + .flags = (te9->client->flags & I2C_M_TEN) | I2C_M_RD, + .len = len, + .buf = buf, + }, + }; + do { + err = i2c_transfer(te9->client->adapter, msgs, 2); + if (err != 2) + msleep_interruptible(I2C_RETRY_DELAY); + } while ((err != 2) && (++tries < I2C_RETRIES)); + + if (err != 2) { + dev_err(&te9->client->dev, "read transfer error\n"); + err = -EIO; + } else { + err = 0; + } + + return err; +} + +static int kxte9_i2c_write(struct kxte9_data *te9, u8 * buf, int len) +{ + int err; + int tries = 0; + + struct i2c_msg msgs[] = { + { + .addr = te9->client->addr, + .flags = te9->client->flags & I2C_M_TEN, + .len = len + 1, + .buf = buf, + }, + }; + do { + err = i2c_transfer(te9->client->adapter, msgs, 1); + if (err != 1) + msleep_interruptible(I2C_RETRY_DELAY); + } while ((err != 1) && (++tries < I2C_RETRIES)); + + if (err != 1) { + dev_err(&te9->client->dev, "write transfer error\n"); + err = -EIO; + } else { + err = 0; + } + + return err; +} + +static int kxte9_hw_init(struct kxte9_data *te9) +{ + int err = -1; + u8 buf[2] = { CTRL_REG1, PC1_OFF }; + + err = kxte9_i2c_write(te9, buf, 1); + if (err < 0) + return err; + buf[0] = CTRL_REG3; + buf[1] = te9->resume_state[RES_CTRL_REG3]; + err = kxte9_i2c_write(te9, buf, 1); + if (err < 0) + return err; + buf[0] = INT_CTRL1; + buf[1] = te9->resume_state[RES_INT_CTRL1]; + err = kxte9_i2c_write(te9, buf, 1); + if (err < 0) + return err; + buf[0] = TILT_TIMER; + buf[1] = te9->resume_state[RES_TILT_TIMER]; + err = kxte9_i2c_write(te9, buf, 1); + if (err < 0) + return err; + buf[0] = WUF_TIMER; + buf[1] = te9->resume_state[RES_WUF_TIMER]; + err = kxte9_i2c_write(te9, buf, 1); + if (err < 0) + return err; + buf[0] = B2S_TIMER; + buf[1] = te9->resume_state[RES_B2S_TIMER]; + err = kxte9_i2c_write(te9, buf, 1); + if (err < 0) + return err; + buf[0] = WUF_THRESH; + buf[1] = te9->resume_state[RES_WUF_THRESH]; + err = kxte9_i2c_write(te9, buf, 1); + if (err < 0) + return err; + buf[0] = B2S_THRESH; + buf[1] = te9->resume_state[RES_B2S_THRESH]; + err = kxte9_i2c_write(te9, buf, 1); + if (err < 0) + return err; + buf[0] = CTRL_REG1; + buf[1] = (te9->resume_state[RES_CTRL_REG1] | PC1_ON); + err = kxte9_i2c_write(te9, buf, 1); + if (err < 0) + return err; + te9->resume_state[RES_CTRL_REG1] = buf[1]; + te9->hw_initialized = 1; + + return 0; +} + +static void kxte9_device_power_off(struct kxte9_data *te9) +{ + int err; + u8 buf[2] = { CTRL_REG1, PC1_OFF }; + + err = kxte9_i2c_write(te9, buf, 1); + if (err < 0) + dev_err(&te9->client->dev, "soft power off failed\n"); + disable_irq_nosync(te9->irq); + if (te9->pdata->power_off) + te9->pdata->power_off(); + te9->hw_initialized = 0; +} + +static int kxte9_device_power_on(struct kxte9_data *te9) +{ + int err; + + if (te9->pdata->power_on) { + err = te9->pdata->power_on(); + if (err < 0) + return err; + } + enable_irq(te9->irq); + if (!te9->hw_initialized) { + mdelay(110); + err = kxte9_hw_init(te9); + if (err < 0) { + kxte9_device_power_off(te9); + return err; + } + } + + return 0; +} + +static irqreturn_t kxte9_isr(int irq, void *dev) +{ + struct kxte9_data *te9 = dev; + + disable_irq_nosync(irq); + queue_work(te9->irq_work_queue, &te9->irq_work); + + return IRQ_HANDLED; +} + +static u8 kxte9_resolve_dir(struct kxte9_data *te9, u8 dir) +{ + switch (dir) { + case 0x20: /* -X */ + if (te9->pdata->negate_x) + dir = 0x10; + if (te9->pdata->axis_map_y == 0) + dir >>= 2; + if (te9->pdata->axis_map_z == 0) + dir >>= 4; + break; + case 0x10: /* +X */ + if (te9->pdata->negate_x) + dir = 0x20; + if (te9->pdata->axis_map_y == 0) + dir >>= 2; + if (te9->pdata->axis_map_z == 0) + dir >>= 4; + break; + case 0x08: /* -Y */ + if (te9->pdata->negate_y) + dir = 0x04; + if (te9->pdata->axis_map_x == 1) + dir <<= 2; + if (te9->pdata->axis_map_z == 1) + dir >>= 2; + break; + case 0x04: /* +Y */ + if (te9->pdata->negate_y) + dir = 0x08; + if (te9->pdata->axis_map_x == 1) + dir <<= 2; + if (te9->pdata->axis_map_z == 1) + dir >>= 2; + break; + case 0x02: /* -Z */ + if (te9->pdata->negate_z) + dir = 0x01; + if (te9->pdata->axis_map_x == 2) + dir <<= 4; + if (te9->pdata->axis_map_y == 2) + dir <<= 2; + break; + case 0x01: /* +Z */ + if (te9->pdata->negate_z) + dir = 0x02; + if (te9->pdata->axis_map_x == 2) + dir <<= 4; + if (te9->pdata->axis_map_y == 2) + dir <<= 2; + break; + default: + return -EINVAL; + } + + return dir; +} + +static void kxte9_irq_work_func(struct work_struct *work) +{ +/* + * int_status output: + * [INT_SRC_REG1][INT_SRC_REG2][TILT_POS_PRE][TILT_POS_CUR] + * INT_SRC_REG2, TILT_POS_PRE, and TILT_POS_CUR directions are translated + * based on platform data variables. + */ + + int err; + int i; + int int_status = 0; + u8 status; + u8 b2s_comp; + u8 wuf_comp; + u8 buf[2]; + + struct kxte9_data *te9 = container_of(work, + struct kxte9_data, irq_work); + if (!gpio_get_value(te9->pdata->gpio)) { + enable_irq(te9->irq); + return; + } + + status = INT_STATUS_REG; + err = kxte9_i2c_read(te9, &status, 1); + if (err < 0) + dev_err(&te9->client->dev, "read err int source\n"); + int_status = status << 24; + if ((status & TPS) > 0) { + buf[0] = TILT_POS_CUR; + err = kxte9_i2c_read(te9, buf, 2); + if (err < 0) + dev_err(&te9->client->dev, "read err tilt dir\n"); + int_status |= kxte9_resolve_dir(te9, buf[0]); + int_status |= (kxte9_resolve_dir(te9, buf[1])) << 8; + } + if ((status & WUFS) > 0) { + buf[0] = INT_SRC_REG2; + err = kxte9_i2c_read(te9, buf, 1); + if (err < 0) + dev_err(&te9->client->dev, "reading err wuf dir\n"); + int_status |= (kxte9_resolve_dir(te9, buf[0])) << 16; + b2s_comp = te9->resume_state[RES_CTRL_REG3] & 0x0C >> 2; + wuf_comp = te9->resume_state[RES_CTRL_REG3] & 0x03; + if (!te9->resume_state[RES_CURRENT_ODR] && + !(te9->resume_state[RES_CTRL_REG1] & ODR125) && + !(b2s_comp & wuf_comp)) { + /* set the new poll interval based on wuf odr */ + for (i = 1; i < ARRAY_SIZE(kxte9_odr_table); i++) { + te9->pdata->poll_interval = + kxte9_odr_table[i - 1].cutoff; + if (kxte9_odr_table[i].mask == wuf_comp << 3) + break; + } + if (te9->input_dev) { + cancel_delayed_work_sync(&te9->input_work); + schedule_delayed_work(&te9->input_work, + msecs_to_jiffies(te9->pdata-> + poll_interval)); + } + } + } + if ((status & B2SS) > 0) { + b2s_comp = te9->resume_state[RES_CTRL_REG3] & 0x0C >> 2; + wuf_comp = te9->resume_state[RES_CTRL_REG3] & 0x03; + if (!te9->resume_state[RES_CURRENT_ODR] && + !(te9->resume_state[RES_CTRL_REG1] & ODR125) && + !(b2s_comp & wuf_comp)) { + /* set the new poll interval based on b2s odr */ + for (i = 1; i < ARRAY_SIZE(kxte9_odr_table); i++) { + te9->pdata->poll_interval = + kxte9_odr_table[i - 1].cutoff; + if (kxte9_odr_table[i].mask == b2s_comp << 3) + break; + } + if (te9->input_dev) { + cancel_delayed_work_sync(&te9->input_work); + schedule_delayed_work(&te9->input_work, + msecs_to_jiffies(te9->pdata-> + poll_interval)); + } + } + } + input_report_abs(te9->input_dev, ABS_MISC, int_status); + input_sync(te9->input_dev); + buf[0] = INT_REL; + err = kxte9_i2c_read(te9, buf, 1); + if (err < 0) + dev_err(&te9->client->dev, "error clearing interrupt\n"); + enable_irq(te9->irq); +} + +static int kxte9_update_odr(struct kxte9_data *te9, int poll_interval) +{ + int err = -1; + int i; + u8 config[2]; + + /* + * Convert the poll interval into an output data rate configuration + * that is as low as possible. The ordering of these checks must be + * maintained due to the cascading cut off values - poll intervals are + * checked from shortest to longest. At each check, if the next lower + * ODR cannot support the current poll interval, we stop searching + */ + for (i = 0; i < ARRAY_SIZE(kxte9_odr_table); i++) { + config[1] = kxte9_odr_table[i].mask; + if (poll_interval < kxte9_odr_table[i].cutoff) + break; + } + + if (atomic_read(&te9->enabled)) { + config[0] = CTRL_REG1; + config[1] |= (te9->resume_state[RES_CTRL_REG1] & ~ODR40); + err = kxte9_i2c_write(te9, config, 1); + if (err < 0) + return err; + /* + * Latch on input_dev - indicates that kxte9_input_init passed + * and this workqueue is available + */ + if (te9->input_dev) { + cancel_delayed_work_sync(&te9->input_work); + schedule_delayed_work(&te9->input_work, + msecs_to_jiffies(poll_interval)); + } + } + te9->resume_state[RES_CTRL_REG1] = config[1]; + + return 0; +} + +static int kxte9_get_acceleration_data(struct kxte9_data *te9, int *xyz) +{ + int err = -1; + /* Data bytes from hardware x, y, z */ + u8 acc_data[3]; + /* x,y,z hardware values */ + int hw_d[3] = { 0 }; + acc_data[0] = XOUT; + + err = kxte9_i2c_read(te9, acc_data, 3); + if (err < 0) + return err; + + acc_data[0] >>= 2; + acc_data[1] >>= 2; + acc_data[2] >>= 2; + + hw_d[0] = (int) acc_data[0]; + hw_d[1] = (int) acc_data[1]; + hw_d[2] = (int) acc_data[2]; + + hw_d[0] -= 32; + hw_d[1] -= 32; + hw_d[2] -= 32; + + hw_d[0] <<= 6; + hw_d[1] <<= 6; + hw_d[2] <<= 6; + + xyz[0] = ((te9->pdata->negate_x) ? (-hw_d[te9->pdata->axis_map_x]) + : (hw_d[te9->pdata->axis_map_x])); + xyz[1] = ((te9->pdata->negate_y) ? (-hw_d[te9->pdata->axis_map_y]) + : (hw_d[te9->pdata->axis_map_y])); + xyz[2] = ((te9->pdata->negate_z) ? (-hw_d[te9->pdata->axis_map_z]) + : (hw_d[te9->pdata->axis_map_z])); + + return err; +} + +static void kxte9_report_values(struct kxte9_data *te9, int *xyz) +{ + input_report_abs(te9->input_dev, ABS_X, xyz[0]); + input_report_abs(te9->input_dev, ABS_Y, xyz[1]); + input_report_abs(te9->input_dev, ABS_Z, xyz[2]); + input_sync(te9->input_dev); +} + +static int kxte9_enable(struct kxte9_data *te9) +{ + int err; + int int_status = 0; + u8 buf; + + if (!atomic_cmpxchg(&te9->enabled, 0, 1)) { + err = kxte9_device_power_on(te9); + buf = INT_REL; + err = kxte9_i2c_read(te9, &buf, 1); + if (err < 0) + dev_err(&te9->client->dev, + "error clearing interrupt: %d\n", err); + if (err < 0) { + atomic_set(&te9->enabled, 0); + return err; + } + if ((te9->resume_state[RES_CTRL_REG1] & TPS) > 0) { + buf = TILT_POS_CUR; + err = kxte9_i2c_read(te9, &buf, 1); + if (err < 0) + dev_err(&te9->client->dev, + "kxte9 error reading current tilt\n"); + int_status |= kxte9_resolve_dir(te9, buf); + input_report_abs(te9->input_dev, ABS_MISC, int_status); + input_sync(te9->input_dev); + } + + schedule_delayed_work(&te9->input_work, + msecs_to_jiffies(te9-> + pdata->poll_interval)); + } + + return 0; +} + +static int kxte9_disable(struct kxte9_data *te9) +{ + if (atomic_cmpxchg(&te9->enabled, 1, 0)) { + cancel_delayed_work_sync(&te9->input_work); + kxte9_device_power_off(te9); + } + + return 0; +} + +static int kxte9_misc_open(struct inode *inode, struct file *file) +{ + int err; + + err = nonseekable_open(inode, file); + if (err < 0) + return err; + file->private_data = kxte9_misc_data; + + return 0; +} + +static int kxte9_misc_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg) +{ + void __user *argp = (void __user *)arg; + u8 ctrl[2] = { CTRL_REG1, PC1_OFF }; + int err; + int tmp; + struct kxte9_data *te9 = file->private_data; + + switch (cmd) { + case KXTE9_IOCTL_GET_DELAY: + tmp = te9->pdata->poll_interval; + if (copy_to_user(argp, &tmp, sizeof(tmp))) + return -EFAULT; + break; + case KXTE9_IOCTL_SET_DELAY: + if (copy_from_user(&tmp, argp, sizeof(tmp))) + return -EFAULT; + if (tmp < 0) + return -EINVAL; + te9->pdata->poll_interval = max(tmp, te9->pdata->min_interval); + err = kxte9_update_odr(te9, te9->pdata->poll_interval); + if (err < 0) + return err; + ctrl[0] = CTRL_REG3; + ctrl[1] = te9->resume_state[RES_CTRL_REG1] & 0x18; + te9->resume_state[RES_CURRENT_ODR] = ctrl[1]; + ctrl[1] = (ctrl[1] >> 1) | (ctrl[1] >> 3); + err = kxte9_i2c_write(te9, ctrl, 1); + if (err < 0) + return err; + te9->resume_state[RES_CTRL_REG3] = ctrl[1]; + break; + case KXTE9_IOCTL_SET_ENABLE: + if (copy_from_user(&tmp, argp, sizeof(tmp))) + return -EFAULT; + if (tmp < 0 || tmp > 1) + return -EINVAL; + + if (tmp) + kxte9_enable(te9); + else + kxte9_disable(te9); + break; + case KXTE9_IOCTL_GET_ENABLE: + tmp = atomic_read(&te9->enabled); + if (copy_to_user(argp, &tmp, sizeof(tmp))) + return -EINVAL; + break; + case KXTE9_IOCTL_SET_TILT_ENABLE: + if (copy_from_user(&tmp, argp, sizeof(tmp))) + return -EFAULT; + if (tmp < 0 || tmp > 1) + return -EINVAL; + if (tmp) + te9->resume_state[RES_CTRL_REG1] |= TPE; + + else + te9->resume_state[RES_CTRL_REG1] &= (~TPE); + ctrl[1] = te9->resume_state[RES_CTRL_REG1]; + err = kxte9_i2c_write(te9, ctrl, 1); + if (err < 0) + return err; + break; + case KXTE9_IOCTL_SET_WAKE_ENABLE: + if (copy_from_user(&tmp, argp, sizeof(tmp))) + return -EFAULT; + if (tmp < 0 || tmp > 1) + return -EINVAL; + if (tmp) { + te9->resume_state[RES_CTRL_REG1] |= (WUFE | B2SE); + ctrl[1] = te9->resume_state[RES_CTRL_REG1]; + err = kxte9_i2c_write(te9, ctrl, 1); + if (err < 0) + return err; + } else { + te9->resume_state[RES_CTRL_REG1] &= (~WUFE & ~B2SE); + ctrl[1] = te9->resume_state[RES_CTRL_REG1]; + err = kxte9_i2c_write(te9, ctrl, 1); + if (err < 0) + return err; + } + break; + case KXTE9_IOCTL_SELF_TEST: + if (copy_from_user(&tmp, argp, sizeof(tmp))) + return -EFAULT; + if (tmp < 0 || tmp > 1) + return -EINVAL; + ctrl[0] = 0x3A; + if (tmp) { + ctrl[1] = 0xCA; + err = kxte9_i2c_write(te9, ctrl, 1); + if (err < 0) + return err; + } else { + ctrl[1] = 0x00; + err = kxte9_i2c_write(te9, ctrl, 1); + if (err < 0) + return err; + } + break; + default: + return -EINVAL; + } + + return 0; +} + +static const struct file_operations kxte9_misc_fops = { + .owner = THIS_MODULE, + .open = kxte9_misc_open, + .ioctl = kxte9_misc_ioctl, +}; + +static struct miscdevice kxte9_misc_device = { + .minor = MISC_DYNAMIC_MINOR, + .name = NAME, + .fops = &kxte9_misc_fops, +}; + +static void kxte9_input_work_func(struct work_struct *work) +{ + struct kxte9_data *te9 = container_of((struct delayed_work *)work, + struct kxte9_data, input_work); + int xyz[3] = { 0 }; + int err; + + mutex_lock(&te9->lock); + err = kxte9_get_acceleration_data(te9, xyz); + if (err < 0) + dev_err(&te9->client->dev, "get_acceleration_data failed\n"); + else + kxte9_report_values(te9, xyz); + schedule_delayed_work(&te9->input_work, + msecs_to_jiffies(te9->pdata->poll_interval)); + mutex_unlock(&te9->lock); +} + +#ifdef KXTE9_OPEN_ENABLE +int kxte9_input_open(struct input_dev *input) +{ + struct kxte9_data *te9 = input_get_drvdata(input); + + return kxte9_enable(te9); +} + +void kxte9_input_close(struct input_dev *dev) +{ + struct kxte9_data *te9 = input_get_drvdata(dev); + + kxte9_disable(te9); +} +#endif + +static int kxte9_validate_pdata(struct kxte9_data *te9) +{ + te9->pdata->poll_interval = max(te9->pdata->poll_interval, + te9->pdata->min_interval); + if (te9->pdata->axis_map_x > 2 || + te9->pdata->axis_map_y > 2 || te9->pdata->axis_map_z > 2 || + te9->pdata->axis_map_x == te9->pdata->axis_map_y || + te9->pdata->axis_map_x == te9->pdata->axis_map_z || + te9->pdata->axis_map_y == te9->pdata->axis_map_z) { + dev_err(&te9->client->dev, + "invalid axis_map value x:%u y:%u z:%u\n", + te9->pdata->axis_map_x, te9->pdata->axis_map_y, + te9->pdata->axis_map_z); + return -EINVAL; + } + if (te9->pdata->negate_x > 1 || te9->pdata->negate_y > 1 || + te9->pdata->negate_z > 1) { + dev_err(&te9->client->dev, + "invalid negate value x:%u y:%u z:%u\n", + te9->pdata->negate_x, te9->pdata->negate_y, + te9->pdata->negate_z); + return -EINVAL; + } + + return 0; +} + +static int kxte9_input_init(struct kxte9_data *te9) +{ + int err; + + INIT_DELAYED_WORK(&te9->input_work, kxte9_input_work_func); + te9->input_dev = input_allocate_device(); + if (!te9->input_dev) { + err = -ENOMEM; + dev_err(&te9->client->dev, "input device allocate failed\n"); + goto err0; + } +#ifdef KXTE9_OPEN_ENABLE + te9->input_dev->open = kxte9_input_open; + te9->input_dev->close = kxte9_input_close; +#endif + input_set_drvdata(te9->input_dev, te9); + + set_bit(EV_ABS, te9->input_dev->evbit); + set_bit(ABS_MISC, te9->input_dev->absbit); + + input_set_abs_params(te9->input_dev, ABS_X, -G_MAX, G_MAX, FUZZ, FLAT); + input_set_abs_params(te9->input_dev, ABS_Y, -G_MAX, G_MAX, FUZZ, FLAT); + input_set_abs_params(te9->input_dev, ABS_Z, -G_MAX, G_MAX, FUZZ, FLAT); + + te9->input_dev->name = "accelerometer"; + + err = input_register_device(te9->input_dev); + if (err) { + dev_err(&te9->client->dev, + "unable to register input polled device %s\n", + te9->input_dev->name); + goto err1; + } + + return 0; +err1: + input_free_device(te9->input_dev); +err0: + return err; +} + +static void kxte9_input_cleanup(struct kxte9_data *te9) +{ + input_unregister_device(te9->input_dev); + input_free_device(te9->input_dev); +} + +static int kxte9_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct kxte9_data *te9; + int err = -1; + + if (client->dev.platform_data == NULL) { + dev_err(&client->dev, "platform data is NULL. exiting.\n"); + err = -ENODEV; + goto err0; + } + if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { + dev_err(&client->dev, "client not i2c capable\n"); + err = -ENODEV; + goto err0; + } + te9 = kzalloc(sizeof(*te9), GFP_KERNEL); + if (te9 == NULL) { + dev_err(&client->dev, + "failed to allocate memory for module data\n"); + err = -ENOMEM; + goto err0; + } + + mutex_init(&te9->lock); + mutex_lock(&te9->lock); + te9->client = client; + + INIT_WORK(&te9->irq_work, kxte9_irq_work_func); + te9->irq_work_queue = create_singlethread_workqueue("kxte9_wq"); + if (!te9->irq_work_queue) { + err = -ENOMEM; + pr_err("%s: cannot create work queue: %d\n", __func__, err); + goto err1; + } + te9->pdata = kmalloc(sizeof(*te9->pdata), GFP_KERNEL); + if (te9->pdata == NULL) + goto err2; + memcpy(te9->pdata, client->dev.platform_data, sizeof(*te9->pdata)); + err = kxte9_validate_pdata(te9); + if (err < 0) { + dev_err(&client->dev, "failed to validate platform data\n"); + goto err3; + } + i2c_set_clientdata(client, te9); + if (te9->pdata->init) { + err = te9->pdata->init(); + if (err < 0) + goto err3; + } + + te9->irq = gpio_to_irq(te9->pdata->gpio); + + memset(te9->resume_state, 0, ARRAY_SIZE(te9->resume_state)); + te9->resume_state[RES_CTRL_REG1] = te9->pdata->ctrl_reg1_init; + te9->resume_state[RES_CTRL_REG3] = te9->pdata->engine_odr_init; + te9->resume_state[RES_INT_CTRL1] = te9->pdata->int_ctrl_init; + te9->resume_state[RES_TILT_TIMER] = te9->pdata->tilt_timer_init; + te9->resume_state[RES_WUF_TIMER] = te9->pdata->wuf_timer_init; + te9->resume_state[RES_B2S_TIMER] = te9->pdata->b2s_timer_init; + te9->resume_state[RES_WUF_THRESH] = te9->pdata->wuf_thresh_init; + te9->resume_state[RES_B2S_THRESH] = te9->pdata->b2s_thresh_init; + te9->resume_state[RES_CURRENT_ODR] = 0; + + err = kxte9_device_power_on(te9); + if (err < 0) + goto err4; + atomic_set(&te9->enabled, 1); + err = kxte9_update_odr(te9, te9->pdata->poll_interval); + if (err < 0) { + dev_err(&client->dev, "update_odr failed\n"); + goto err5; + } + err = kxte9_input_init(te9); + if (err < 0) + goto err5; + kxte9_misc_data = te9; + err = misc_register(&kxte9_misc_device); + if (err < 0) { + dev_err(&client->dev, "te9_device register failed\n"); + goto err6; + } + kxte9_device_power_off(te9); + atomic_set(&te9->enabled, 0); + err = request_irq(te9->irq, kxte9_isr, + IRQF_TRIGGER_RISING, + "kxte9_irq", te9); + if (err < 0) { + pr_err("%s: request irq failed: %d\n", __func__, err); + goto err7; + } + disable_irq_nosync(te9->irq); + + mutex_unlock(&te9->lock); + + dev_info(&client->dev, "kxte9 probed\n"); + + return 0; + +err7: + misc_deregister(&kxte9_misc_device); +err6: + kxte9_input_cleanup(te9); +err5: + kxte9_device_power_off(te9); +err4: + if (te9->pdata->exit) + te9->pdata->exit(); +err3: + kfree(te9->pdata); +err2: + destroy_workqueue(te9->irq_work_queue); +err1: + mutex_unlock(&te9->lock); + kfree(te9); +err0: + return err; +} + +static int __devexit kxte9_remove(struct i2c_client *client) +{ + struct kxte9_data *te9 = i2c_get_clientdata(client); + + free_irq(te9->irq, te9); + gpio_free(te9->pdata->gpio); + misc_deregister(&kxte9_misc_device); + kxte9_input_cleanup(te9); + kxte9_device_power_off(te9); + if (te9->pdata->exit) + te9->pdata->exit(); + kfree(te9->pdata); + destroy_workqueue(te9->irq_work_queue); + kfree(te9); + + return 0; +} + +static int kxte9_resume(struct i2c_client *client) +{ + struct kxte9_data *te9 = i2c_get_clientdata(client); + + return kxte9_enable(te9); +} + +static int kxte9_suspend(struct i2c_client *client, pm_message_t mesg) +{ + struct kxte9_data *te9 = i2c_get_clientdata(client); + + return kxte9_disable(te9); +} + +static const struct i2c_device_id kxte9_id[] = { + {NAME, 0}, + {}, +}; + +MODULE_DEVICE_TABLE(i2c, kxte9_id); + +static struct i2c_driver kxte9_driver = { + .driver = { + .name = NAME, + }, + .probe = kxte9_probe, + .remove = __devexit_p(kxte9_remove), + .resume = kxte9_resume, + .suspend = kxte9_suspend, + .id_table = kxte9_id, +}; + +static int __init kxte9_init(void) +{ + pr_info(KERN_INFO "kxte9 accelerometer driver\n"); + return i2c_add_driver(&kxte9_driver); +} + +static void __exit kxte9_exit(void) +{ + i2c_del_driver(&kxte9_driver); + return; +} + +module_init(kxte9_init); +module_exit(kxte9_exit); + +MODULE_DESCRIPTION("KXTE9 accelerometer driver"); +MODULE_AUTHOR("Kionix, Inc."); +MODULE_LICENSE("GPL"); diff --git a/include/linux/kxte9.h b/include/linux/kxte9.h new file mode 100644 index 0000000..0765d14 --- /dev/null +++ b/include/linux/kxte9.h @@ -0,0 +1,95 @@ +/* + * Copyright (c) 2009, Kionix, Inc. All Rights Reserved. + * Written by Chris Hudson + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * 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 /* For IOCTL macros */ + +#ifndef __KXTE9_H__ +#define __KXTE9_H__ + +#define KXTE9_IOCTL_BASE 77 +/** The following define the IOCTL command values via the ioctl macros */ +#define KXTE9_IOCTL_SET_DELAY _IOW(KXTE9_IOCTL_BASE, 0, int) +#define KXTE9_IOCTL_GET_DELAY _IOR(KXTE9_IOCTL_BASE, 1, int) +#define KXTE9_IOCTL_SET_ENABLE _IOW(KXTE9_IOCTL_BASE, 2, int) +#define KXTE9_IOCTL_GET_ENABLE _IOR(KXTE9_IOCTL_BASE, 3, int) +#define KXTE9_IOCTL_SET_TILT_ENABLE _IOW(KXTE9_IOCTL_BASE, 5, int) +#define KXTE9_IOCTL_SET_B2S_ENABLE _IOW(KXTE9_IOCTL_BASE, 6, int) +#define KXTE9_IOCTL_SET_WAKE_ENABLE _IOW(KXTE9_IOCTL_BASE, 7, int) +#define KXTE9_IOCTL_SELF_TEST _IOW(KXTE9_IOCTL_BASE, 8, int) + +#define KXTE9_I2C_ADDR 0x0F +/* CONTROL REGISTER 1 BITS */ +#define TPE 0x01 /* tilt position function enable bit */ +#define WUFE 0x02 /* wake-up function enable bit */ +#define B2SE 0x04 /* back-to-sleep function enable bit */ +#define ODR125 0x20 /* 125Hz ODR mode */ +#define ODR40 0x18 /* initial ODR masks */ +#define ODR10 0x10 +#define ODR3 0x08 +#define ODR1 0x00 +/* CONTROL REGISTER 3 BITS */ +#define OB2S40 0x0C /* back-to-sleep ODR masks */ +#define OB2S10 0x08 +#define OB2S3 0x04 +#define OB2S1 0x00 +#define OWUF40 0x03 /* wake-up ODR masks */ +#define OWUF10 0x02 +#define OWUF3 0x01 +#define OWUF1 0x00 +/* INTERRUPT CONTROL REGISTER 1 BITS */ +#define KXTE9_IEN 0x10 /* interrupt enable */ +#define KXTE9_IEA 0x08 /* interrupt polarity */ +#define KXTE9_IEL 0x04 /* interrupt response */ + + +#ifdef __KERNEL__ +struct kxte9_platform_data { + int poll_interval; + int min_interval; + + u8 g_range; + + u8 axis_map_x; + u8 axis_map_y; + u8 axis_map_z; + + u8 negate_x; + u8 negate_y; + u8 negate_z; + + u8 ctrl_reg1_init; + u8 engine_odr_init; + u8 int_ctrl_init; + u8 tilt_timer_init; + u8 wuf_timer_init; + u8 b2s_timer_init; + u8 wuf_thresh_init; + u8 b2s_thresh_init; + + int (*init)(void); + void (*exit)(void); + int (*power_on)(void); + int (*power_off)(void); + + int gpio; +}; +#endif /* __KERNEL__ */ + +#endif /* __KXTE9_H__ */ +