Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755547Ab3FPVjS (ORCPT ); Sun, 16 Jun 2013 17:39:18 -0400 Received: from etezian.org ([198.101.225.253]:40794 "EHLO mail.etezian.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752385Ab3FPVjO (ORCPT ); Sun, 16 Jun 2013 17:39:14 -0400 From: Andi Shyti To: arnd@arndb.de, gregkh@linuxfoundation.org, rob@landley.net Cc: oatilla@gmail.com, szsolt@gmail.com, linux-kernel@vger.kernel.org, andi@etezian.org, linux-doc@vger.kernel.org Subject: [PATCH 1/2] drivers/misc: etzkx driver for kxcnl/kxtnk accelerometer Date: Sun, 16 Jun 2013 23:40:27 +0200 Message-Id: X-Mailer: git-send-email 1.7.10.4 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 68508 Lines: 2553 The ETZKX state machine interrupt driven accelerometer is a support for the Kionix kxtnk and kxcnl 3d accelerometer. The driver generates three interfaces to the userspace: - sysfs: the interfaces allow the user to enable/disable the streaming of the x, y, z values, set output data rate and g range sensitivity, enable/disable self_test - /dev/input/eventX: is possible to read the x, y, z coordinates - /dev/etzkx_stm: the user can trigger the state machine gesture recognition ETZKX_ACCEL is the flag which enables the accelerometer. Signed-off-by: Andi Shyti Tested-by: Onur Atilla Tested-by: Simon Zsolt --- drivers/misc/Kconfig | 12 + drivers/misc/Makefile | 1 + drivers/misc/etzkx.c | 2313 +++++++++++++++++++++++++++++++++++++++++++++ include/linux/i2c/etzkx.h | 157 +++ 4 files changed, 2483 insertions(+) create mode 100644 drivers/misc/etzkx.c create mode 100644 include/linux/i2c/etzkx.h diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index c002d86..0d6baf6 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -381,6 +381,18 @@ config HMC6352 This driver provides support for the Honeywell HMC6352 compass, providing configuration and heading data via sysfs. +config ETZKX_ACCEL + tristate "ETZKX kxcnl/kxtnk 3d digital accelerometer" + depends on I2C && INPUT + default n + help + This driver provides support for the Kionix kxtnk/kxcnl three-axis + accelerometer, which supports programmable state machines for + gesture recognition + + To compile this driver as a module, say M here: the module will be + called etzkx.ko. If unsure, say N here + config EP93XX_PWM tristate "EP93xx PWM support" depends on ARCH_EP93XX diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile index c235d5b..72271eb 100644 --- a/drivers/misc/Makefile +++ b/drivers/misc/Makefile @@ -33,6 +33,7 @@ obj-$(CONFIG_APDS9802ALS) += apds9802als.o obj-$(CONFIG_ISL29003) += isl29003.o obj-$(CONFIG_ISL29020) += isl29020.o obj-$(CONFIG_SENSORS_TSL2550) += tsl2550.o +obj-$(CONFIG_ETZKX_ACCEL) += etzkx.o obj-$(CONFIG_EP93XX_PWM) += ep93xx_pwm.o obj-$(CONFIG_DS1682) += ds1682.o obj-$(CONFIG_TI_DAC7512) += ti_dac7512.o diff --git a/drivers/misc/etzkx.c b/drivers/misc/etzkx.c new file mode 100644 index 0000000..27930b1 --- /dev/null +++ b/drivers/misc/etzkx.c @@ -0,0 +1,2313 @@ +/* + * etzkx: lisn3dsh/kxtnk 3d accelerometer driver + * + * Copyright(C) 2013 Andi Shyti + * + * 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 2 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, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* register map */ +#define ETZKX_REG_INFO1 0x0D +#define ETZKX_REG_INFO2 0x0E +#define ETZKX_REG_WIA 0x0F +#define ETZKX_REG_OUTX_L 0x10 +#define ETZKX_REG_OUTX_H 0x11 +#define ETZKX_REG_OUTY_L 0x12 +#define ETZKX_REG_OUTY_H 0x13 +#define ETZKX_REG_OUTZ_L 0x14 +#define ETZKX_REG_OUTZ_H 0x15 +#define ETZKX_REG_LC_L 0x16 +#define ETZKX_REG_LC_H 0x17 +#define ETZKX_REG_STAT 0x18 +#define ETZKX_REG_PEAK1 0x19 +#define ETZKX_REG_PEAK2 0x1A +#define ETZKX_REG_CNTL1 0x1B +#define ETZKX_REG_CNTL2 0x1C +#define ETZKX_REG_CNTL3 0x1D +#define ETZKX_REG_CNTL4 0x1E +#define ETZKX_REG_THRS3 0x1F +#define ETZKX_REG_OFF_X 0x20 +#define ETZKX_REG_OFF_Y 0x21 +#define ETZKX_REG_OFF_Z 0x22 +#define ETZKX_REG_CS_X 0x24 +#define ETZKX_REG_CS_Y 0x25 +#define ETZKX_REG_CS_Z 0x26 +#define ETZKX_REG_X_DEBUG 0x28 +#define ETZKX_REG_Y_DEBUG 0x29 +#define ETZKX_REG_Z_DEBUG 0x2A +#define ETZKX_REG_VFC_1 0x2C +#define ETZKX_REG_VFC_2 0x2D +#define ETZKX_REG_VFC_3 0x2E +#define ETZKX_REG_VFC_4 0x2F + +#define ETZKX_REG_ST1_1 0x40 +#define ETZKX_REG_ST2_1 0x41 +#define ETZKX_REG_ST3_1 0x42 +#define ETZKX_REG_ST4_1 0x43 +#define ETZKX_REG_ST5_1 0x44 +#define ETZKX_REG_ST6_1 0x45 +#define ETZKX_REG_ST7_1 0x46 +#define ETZKX_REG_ST8_1 0x47 +#define ETZKX_REG_ST9_1 0x48 +#define ETZKX_REG_ST10_1 0x49 +#define ETZKX_REG_ST11_1 0x4A +#define ETZKX_REG_ST12_1 0x4B +#define ETZKX_REG_ST13_1 0x4C +#define ETZKX_REG_ST14_1 0x4D +#define ETZKX_REG_ST15_1 0x4E +#define ETZKX_REG_ST16_1 0x4F +#define ETZKX_REG_TIM4_1 0x50 +#define ETZKX_REG_TIM3_1 0x51 +#define ETZKX_REG_TIM2_L_1 0x52 +#define ETZKX_REG_TIM2_H_1 0x53 +#define ETZKX_REG_TIM1_L_1 0x54 +#define ETZKX_REG_TIM1_H_1 0x55 +#define ETZKX_REG_THRS2_1 0x56 +#define ETZKX_REG_THRS1_1 0x57 +#define ETZKX_REG_SA_1 0x59 +#define ETZKX_REG_MA_1 0x5A +#define ETZKX_REG_SETT_1 0x5B +#define ETZKX_REG_PR_1 0x5C +#define ETZKX_REG_TC_L_1 0x5D +#define ETZKX_REG_TC_H_1 0x5E +#define ETZKX_REG_OUTS_1 0x5F + +#define ETZKX_REG_ST1_2 0x60 +#define ETZKX_REG_ST2_2 0x61 +#define ETZKX_REG_ST3_2 0x62 +#define ETZKX_REG_ST4_2 0x63 +#define ETZKX_REG_ST5_2 0x64 +#define ETZKX_REG_ST6_2 0x65 +#define ETZKX_REG_ST7_2 0x66 +#define ETZKX_REG_ST8_2 0x67 +#define ETZKX_REG_ST9_2 0x68 +#define ETZKX_REG_ST10_2 0x69 +#define ETZKX_REG_ST11_2 0x6A +#define ETZKX_REG_ST12_2 0x6B +#define ETZKX_REG_ST13_2 0x6C +#define ETZKX_REG_ST14_2 0x6D +#define ETZKX_REG_ST15_2 0x6E +#define ETZKX_REG_ST16_2 0x6F +#define ETZKX_REG_TIM4_2 0x70 +#define ETZKX_REG_TIM3_2 0x71 +#define ETZKX_REG_TIM2_L_2 0x72 +#define ETZKX_REG_TIM2_H_2 0x73 +#define ETZKX_REG_TIM1_L_2 0x74 +#define ETZKX_REG_TIM1_H_2 0x75 +#define ETZKX_REG_THRS2_2 0x76 +#define ETZKX_REG_THRS1_2 0x77 +#define ETZKX_REG_DES_2 0x78 +#define ETZKX_REG_SA_2 0x79 +#define ETZKX_REG_MA_2 0x7A +#define ETZKX_REG_SETT_2 0x7B +#define ETZKX_REG_PR_2 0x7C +#define ETZKX_REG_TC_L_2 0x7D +#define ETZKX_REG_TC_H_2 0x7E +#define ETZKX_REG_OUTS_2 0x7F + +/* registers mask */ +/* CNTL1 masks */ +#define ETZKX_CNTL1_IEN_MASK 1 +#define ETZKX_CNTL1_ODR_MASK (7 << 2) +#define ETZKX_CNTL1_G_MASK (3 << 5) +#define ETZKX_CNTL1_PC_MASK (1 << 7) + +/* CNTL2/CNTL3 masks */ +#define ETZKX_CNTLX_SMX_EN_MASK 1 +#define ETZKX_CNTLX_SMX_PIN_MASK (1 << 3) + +/* CNTL4 masks */ +#define ETZKX_CNTL4_STRT_MASK 1 +#define ETZKX_CNTL4_STP_MASK (1 << 1) +#define ETZKX_CNTL4_VFILT_MASK (1 << 2) +#define ETZKX_CNTL4_INT1_EN_MASK (1 << 3) +#define ETZKX_CNTL4_INT2_EN_MASK (1 << 4) +#define ETZKX_CNTL4_IEL_MASK (1 << 5) +#define ETZKX_CNTL4_IEA_MASK (1 << 6) +#define ETZKX_CNTL4_DR_EN_MASK (1 << 7) + +/* SETT_X masks */ +#define ETZKX_SETT_D_CS_MASK (1 << 3) +#define ETZKX_SETT_RADI_MASK (1 << 4) + +/* ODR masks */ +#define ETZKX_ODR_3_125_MASK (ETZKX_ODR_3_125 << 2) +#define ETZKX_ODR_6_25_MASK (ETZKX_ODR_6_25 << 2) +#define ETZKX_ODR_12_5_MASK (ETZKX_ODR_12_5 << 2) +#define ETZKX_ODR_25_MASK (ETZKX_ODR_25 << 2) +#define ETZKX_ODR_50_MASK (ETZKX_ODR_50 << 2) +#define ETZKX_ODR_100_MASK (ETZKX_ODR_100 << 2) +#define ETZKX_ODR_400_MASK (ETZKX_ODR_400 << 2) +#define ETZKX_ODR_1600_MASK (ETZKX_ODR_1600 << 2) + +/* etzkx driver states */ +#define ETZKX_STATE_POWER_OFF 0 +#define ETZKX_STATE_STDBY 1 +#define ETZKX_STATE_ACTIVE (1 << 1) +#define ETZKX_STATE_STRM (1 << 2) +#define ETZKX_STATE_STM_1 (1 << 3) +#define ETZKX_STATE_STM_2 (1 << 4) +#define ETZKX_STATE_DRDY (1 << 5) +#define ETZKX_STATE_SELF_TEST (1 << 6) +#define ETZKX_STATE_STRM_STM1 (ETZKX_STATE_STRM | ETZKX_STATE_STM_1) +#define ETZKX_STATE_STRM_STM2 (ETZKX_STATE_STRM | ETZKX_STATE_STM_2) +#define ETZKX_STATE_STM1_STM2 (ETZKX_STATE_STM_1 | ETZKX_STATE_STM_2) +#define ETZKX_STATE_STRM_STM1_STM2 (ETZKX_STATE_STRM | \ + ETZKX_STATE_STM_1 | \ + ETZKX_STATE_STM_2) +#define ETZKX_STATE_DRDY_STM2 (ETZKX_STATE_DRDY | ETZKX_STATE_STM_2) + +#define ETZKX_MAX_POLL_RATE 65535 + +/* State machine definitions */ +#define ETZKX_STM_MAX_STEP 16 +#define ETZKX_STM_LEN 28 +#define ETZKX_NO_STM_RUNNING 0xFF +#define ETZKX_STM_REG_GAP (ETZKX_REG_ST1_2 - ETZKX_REG_ST1_1) + +/* algo selection algorithm */ +#define ETZKX_STM_MATCH_ID 1 +#define ETZKX_STM_MATCH_ODR 2 +#define ETZKX_STM_MATCH_RANGE 4 +#define ETZKX_STM_MATCH_OK (ETZKX_STM_MATCH_ID | \ + ETZKX_STM_MATCH_ODR | \ + ETZKX_STM_MATCH_RANGE) + +/* Instructions set: Next/Reset conditions */ +#define ETZKX_NOP 0x0 +#define ETZKX_TI1 0x1 +#define ETZKX_TI2 0x2 +#define ETZKX_TI3 0x3 +#define ETZKX_TI4 0x4 +#define ETZKX_GNTH1 0x5 +#define ETZKX_GNTH2 0x6 +#define ETZKX_LNTH1 0x7 +#define ETZKX_LNTH2 0x8 +#define ETZKX_GTTH1 0x9 +#define ETZKX_LLTH2 0xA +#define ETZKX_GRTH1 0xB +#define ETZKX_LRTH1 0xC +#define ETZKX_GRTH2 0xD +#define ETZKX_LRTH2 0xE +#define ETZKX_NZERO 0xF +/* Instruction set: Commands */ +#define ETZKX_STOP 0x00 +#define ETZKX_CONT 0x11 +#define ETZKX_JMP 0x22 +#define ETZKX_SRP 0x33 +#define ETZKX_CRP 0x44 +#define ETZKX_SETP 0x55 +#define ETZKX_SETS1 0x66 +#define ETZKX_STHR1 0x77 +#define ETZKX_OUTC 0x88 +#define ETZKX_OUTW 0x99 +#define ETZKX_STHR2 0xAA +#define ETZKX_DEC 0xBB +#define ETZKX_SISW 0xCC +#define ETZKX_REL 0xDD +#define ETZKX_STHR3 0xEE +#define ETZKX_SSYNC 0xFF + +/* specific state machine definitions */ +/* orientation algorithm */ +#define ETZKX_ORIENTATION_PORTRAIT 0x20 +#define ETZKX_ORIENTATION_LANDSCAPE 0x80 + +/* double tap algorithm */ +#define ETZKX_DOUBLE_TAP_PLUS_X 0x40 +#define ETZKX_DOUBLE_TAP_MINUS_X 0x80 +#define ETZKX_DOUBLE_TAP_PLUS_Y 0x10 +#define ETZKX_DOUBLE_TAP_MINUS_Y 0x20 +#define ETZKX_DOUBLE_TAP_PLUS_Z 0x04 +#define ETZKX_DOUBLE_TAP_MINUS_Z 0x08 + +/* accelerometer thresholds for landscape detection */ +#define ETZKX_ORIENTATION_LIMIT 150 +#define ETZKX_MAX_RANGE 8 + +/* accelerometer dimension x, y, z, v */ +#define ETZKX_DIMENSION 8 + +#define ETZKX_ALGO_DES_IDX 24 +#define ETZKX_ALGO_MASK_IDX 25 +#define ETZKX_ALGO_SETT_IDX 27 + +#define etzkx_load_stm1(s, i) __etzkx_load_stm(s, i, 0) +#define etzkx_load_stm2(s, i) __etzkx_load_stm(s, i, \ + ETZKX_STM_REG_GAP) +#define etzkx_enable_stm1(s) __etzkx_enable_stm(s, ETZKX_REG_CNTL2) +#define etzkx_enable_stm2(s) __etzkx_enable_stm(s, ETZKX_REG_CNTL3) +#define etzkx_disable_stm1(s) __etzkx_disable_stm(s, ETZKX_REG_CNTL2) +#define etzkx_disable_stm2(s) __etzkx_disable_stm(s, ETZKX_REG_CNTL3) +#define etzkx_switch_on_vfilter(s, i) __etzkx_switch_vfilter(s, i, 1) +#define etzkx_switch_off_vfilter(s, i) __etzkx_switch_vfilter(s, i, 0) + +/* conditions for an algorithm to be loaded in state machine 2 */ +#define ETZKX_ALGO_STM2(s, o) ((s[ETZKX_ALGO_SETT_IDX] & \ + ETZKX_SETT_RADI_MASK) || \ + ((o == 1600) && (s[ETZKX_ALGO_DES_IDX]))) + +/* WAI register values */ +#define ETZKX_WIA_LISN3DSH 0x3B +#define ETZKX_WIA_KXTNK 0x6E +#define ETZKX_WIA_KXCNL 0x0F + +/* ETZKX accelerometer type names */ +#define ETZKX_LISN3DSH_NAME "lisn3dsh" +#define ETZKX_KXTNK_NAME "kxtnk-1000" + +#define ETZKX_CHARDEV_NAME "etzkx_stm" + +struct etzkx_data { + struct i2c_client *client; + struct etzkx_platform_data *pdata; + struct mutex mutex; + + struct input_dev *input_dev; + struct delayed_work poll_read_work; + + u8 wai; + u8 hw_version; + u8 drv_state; + + u16 poll_rate; + u16 odr; + u8 range; + + u8 stm1; + u8 stm2; + u8 range_back; + u8 mask_matrix[ETZKX_DIMENSION]; + + struct cdev cdev; + struct etzkx_stm_data running_stm; + wait_queue_head_t wq; +}; + +struct etzkx_algo_data { + u8 stm_id; + u8 stm[ETZKX_STM_LEN]; + u8 thrs3; + u8 v[4]; + u8 odr; + u8 range; +}; + +static const struct etzkx_algo_data etzkx_algos[] = { + { ETZKX_STM_ID_TIMING, + { ETZKX_NOP << 4 | ETZKX_TI3, /* 0 */ + ETZKX_NOP << 4 | ETZKX_TI3, /* 1 */ + ETZKX_NOP << 4 | ETZKX_TI3, /* 2 */ + ETZKX_NOP << 4 | ETZKX_TI3, /* 3 */ + ETZKX_NOP << 4 | ETZKX_TI3, /* 4 */ + ETZKX_NOP << 4 | ETZKX_TI3, /* 5 */ + ETZKX_NOP << 4 | ETZKX_TI3, /* 6 */ + ETZKX_NOP << 4 | ETZKX_TI3, /* 7 */ + ETZKX_NOP << 4 | ETZKX_TI3, /* 8 */ + ETZKX_NOP << 4 | ETZKX_TI3, /* 9 */ + ETZKX_NOP << 4 | ETZKX_TI3, /* 10 */ + ETZKX_NOP << 4 | ETZKX_TI3, /* 11 */ + ETZKX_NOP << 4 | ETZKX_TI3, /* 12 */ + ETZKX_NOP << 4 | ETZKX_TI3, /* 13 */ + ETZKX_NOP << 4 | ETZKX_TI3, /* 14 */ + ETZKX_CONT, /* 15 */ + 0x00, /* TIM4 */ + 0x02, /* TIM3 */ + 0x00, /* TIM2 high */ + 0x00, /* TIM2 low */ + 0x00, /* TIM1 high */ + 0x00, /* TIM1 low */ + 0x00, /* THRS2 */ + 0x00, /* THRS1 */ + 0x00, /* DES */ + 0x00, /* mask 2 */ + 0x00, /* mask 1 */ + 0x01, /* settings */ + }, + 0x00, /* THRS3 */ + {0x00, 0x00, 0x00, 0x00}, /* V filter */ + ETZKX_ODR_DONT_CARE, + ETZKX_G_RANGE_DONT_CARE, + }, + { /* orientation, 1600Hz, 4g */ + ETZKX_STM_ID_ORIENTATION, + { ETZKX_NOP << 4 | ETZKX_GNTH1, /* 0 */ + ETZKX_TI2 << 4 | ETZKX_TI4, /* 1 */ + ETZKX_TI1 << 4 | ETZKX_LNTH1, /* 2 */ + ETZKX_GNTH1 << 4 | ETZKX_TI2, /* 3 */ + ETZKX_TI1 << 4 | ETZKX_TI4, /* 4 */ + ETZKX_LNTH2 << 4 | ETZKX_TI3, /* 5 */ + ETZKX_LNTH2 << 4 | ETZKX_LNTH2, /* 6 */ + ETZKX_TI3 << 4 | ETZKX_TI3, /* 7 */ + ETZKX_TI2 << 4 | ETZKX_TI4, /* 8 */ + ETZKX_NOP << 4 | ETZKX_GNTH1, /* 9 */ + ETZKX_TI1 << 4 | ETZKX_TI4, /* 10 */ + ETZKX_TI1 << 4 | ETZKX_LNTH1, /* 11 */ + ETZKX_GNTH1 << 4 | ETZKX_TI2, /* 12 */ + ETZKX_TI2 << 4 | ETZKX_TI4, /* 13 */ + ETZKX_LNTH2 << 4 | ETZKX_TI3, /* 14 */ + ETZKX_TI1 << 4 | ETZKX_TI1, /* 15 */ + 0x00, /* TIM4 */ + 0xa0, /* TIM3 */ + 0x78, /* TIM2 high */ + 0x01, /* TIM2 low */ + 0xa0, /* TIM1 high */ + 0x00, /* TIM1 low */ + 0x10, /* THRS2 */ + 0x0b, /* THRS1 */ + 0x00, /* DES */ + 0x20, /* mask 2 */ + 0x80, /* mask 1 */ + 0x21, /* settings */ + }, + 0x00, /* THRS3 */ + {0x00, 0x00, 0x00, 0x00}, /* V filter */ + ETZKX_ODR_1600, + ETZKX_G_RANGE_4G, + }, + { /* double tap, 1600Hz, 4g */ + ETZKX_STM_ID_DOUBLE_TAP, + { ETZKX_GNTH1 << 4 | ETZKX_TI1, /* 0 */ + ETZKX_GNTH1 << 4 | ETZKX_TI1, /* 1 */ + ETZKX_NOP << 4 | ETZKX_GNTH2, /* 2 */ + ETZKX_TI3 << 4 | ETZKX_LNTH2, /* 3 */ + ETZKX_NOP << 4 | ETZKX_TI4, /* 4 */ + ETZKX_GTTH1 << 4 | ETZKX_TI1, /* 5 */ + ETZKX_TI2 << 4 | ETZKX_GNTH2, /* 6 */ + ETZKX_TI3 << 4 | ETZKX_LNTH2, /* 7 */ + ETZKX_NOP << 4 | ETZKX_TI4, /* 8 */ + ETZKX_GTTH1 << 4 | ETZKX_TI1, /* 9 */ + ETZKX_TI1 << 4 | ETZKX_TI1, /* 10 */ + ETZKX_NOP << 4 | ETZKX_NOP, /* 11 */ + ETZKX_NOP << 4 | ETZKX_NOP, /* 12 */ + ETZKX_NOP << 4 | ETZKX_NOP, /* 13 */ + ETZKX_NOP << 4 | ETZKX_NOP, /* 14 */ + ETZKX_NOP << 4 | ETZKX_NOP, /* 15 */ + 0x20, /* TIM4 */ + 0x0d, /* TIM3 */ + 0x20, /* TIM2 high */ + 0x03, /* TIM2 low */ + 0x70, /* TIM1 high */ + 0x00, /* TIM1 low */ + 0x44, /* THRS2 */ + 0x3a, /* THRS1 */ + 0x00, /* DES */ + 0x00, /* mask 2 */ + 0xfc, /* mask 1 */ + 0xa1, /* settings */ + }, + 0x00, /* THRS3 */ + {0x00, 0x00, 0x00, 0x00}, /* V filter */ + ETZKX_ODR_1600, + ETZKX_G_RANGE_4G, + }, + { /* double tap, 1600Hz, 4g */ + ETZKX_STM_ID_WAKEUP, + { + ETZKX_NOP << 4 | ETZKX_TI3, /* 0 */ + ETZKX_GNTH1 << 4 | ETZKX_TI1, /* 1 */ + ETZKX_NOP << 4 | ETZKX_OUTC, /* 2 */ + ETZKX_NOP << 4 | ETZKX_GNTH1, /* 3 */ + ETZKX_CONT, /* 4 */ + ETZKX_NOP, /* 5 */ + ETZKX_NOP, /* 6 */ + ETZKX_NOP, /* 7 */ + ETZKX_NOP, /* 8 */ + ETZKX_NOP, /* 9 */ + ETZKX_NOP, /* 10 */ + ETZKX_NOP, /* 11 */ + ETZKX_NOP, /* 12 */ + ETZKX_NOP, /* 13 */ + ETZKX_NOP, /* 14 */ + ETZKX_NOP, /* 15 */ + 0x00, /* TIM4 */ + 0x00, /* TIM3 */ + 0x00, /* TIM2 high */ + 0x00, /* TIM2 low */ + 0x00, /* TIM1 high */ + 0x10, /* TIM1 low */ + 0x00, /* THRS2 */ + 0x03, /* THRS1 */ + 0x00, /* DES */ + 0x00, /* mask 2 */ + 0xFC, /* mask 1 */ + 0x31, /* settings */ + }, + 0x00, /* THRS3 */ + {0x00, 0x00, 0x00, 0x00}, /* V filter */ + ETZKX_ODR_1600, + ETZKX_G_RANGE_4G, + }, + { /* double tap based on V filter */ + ETZKX_STM_ID_V_DOUBLE_TAP, + { + ETZKX_GNTH1 << 4 | ETZKX_TI1, /* 0 */ + ETZKX_GNTH1 << 4 | ETZKX_TI1, /* 1 */ + ETZKX_NOP << 4 | ETZKX_GNTH2, /* 2 */ + ETZKX_TI3 << 4 | ETZKX_LNTH2, /* 3 */ + ETZKX_NOP << 4 | ETZKX_TI4, /* 4 */ + ETZKX_GTTH1 << 4 | ETZKX_TI1, /* 5 */ + ETZKX_TI2 << 4 | ETZKX_GNTH2, /* 6 */ + ETZKX_TI3 << 4 | ETZKX_LNTH2, /* 7 */ + ETZKX_NOP << 4 | ETZKX_TI4, /* 8 */ + ETZKX_GTTH1 << 4 | ETZKX_TI1, /* 9 */ + ETZKX_TI1 << 4 | ETZKX_TI1, /* 10 */ + ETZKX_NOP, /* 11 */ + ETZKX_NOP, /* 12 */ + ETZKX_NOP, /* 13 */ + ETZKX_NOP, /* 14 */ + ETZKX_NOP, /* 15 */ + 0x98, /* TIM4 */ + 0x0d, /* TIM3 */ + 0x20, /* TIM2 high */ + 0x03, /* TIM2 low */ + 0x70, /* TIM1 high */ + 0x00, /* TIM1 low */ + 0x05, /* THRS2 */ + 0x03, /* THRS1 */ + 0x00, /* DES */ + 0xf0, /* mask 2 */ + 0x03, /* mask 1 */ + 0xe1, /* settings */ + }, + 0x46, /* THRS3 */ + {0x09, 0x27, 0x57, 0x7f}, /* V filter */ + ETZKX_ODR_1600, + ETZKX_G_RANGE_4G, + }, +}; + +/* driver state prototypes */ +static int etzkx_state_go_stdby(struct etzkx_data *); +static int etzkx_state_go_active(struct etzkx_data *); +static int etzkx_state_enable_streaming(struct etzkx_data *); +static int etzkx_state_disable_streaming(struct etzkx_data *); +static int etzkx_state_enable_st(struct etzkx_data *); +static int etzkx_state_disable_st(struct etzkx_data *); +static int etzkx_state_enable_stm1(struct etzkx_data *, u8, u8); +static int etzkx_state_enable_stm2(struct etzkx_data *, u8, u8); +static int etzkx_state_disable_stm1(struct etzkx_data *, u8); +static int etzkx_state_disable_stm2(struct etzkx_data *, u8); + +static const u16 etzkx_rate_ms[] = {320, 160, 80, 40, 20, 10, 2, 0}; +static const u16 etzkx_rate_hz[] = {3, 6, 12, 25, 50, 100, 400, 1600}; +static const char * const etzkx_rate_str[] = {"3.125", "6.25", "12.5", "25", + "50", "100", "400", "1600"}; +static dev_t etzkx_dev_number; +static struct class *etzkx_class; + +/* get mutex lock before calling set_odr and set_range */ +static int etzkx_set_odr(struct etzkx_data *sdata, u16 new_odr) +{ + u8 odr_mask; + s32 cntl1_reg; + + if (sdata->odr == new_odr) + return 0; + + if ((new_odr < ETZKX_ODR_3_125) || (new_odr > ETZKX_ODR_1600)) + return -EINVAL; + + odr_mask = new_odr << 2; + + cntl1_reg = i2c_smbus_read_byte_data(sdata->client, ETZKX_REG_CNTL1); + if (cntl1_reg < 0) + return -EIO; + cntl1_reg = (cntl1_reg & ~ETZKX_CNTL1_ODR_MASK) | odr_mask; + cntl1_reg = i2c_smbus_write_byte_data(sdata->client, + ETZKX_REG_CNTL1, cntl1_reg); + if (cntl1_reg < 0) + return -EIO; + + sdata->odr = new_odr; + + return 0; +} + +static int etzkx_set_range(struct etzkx_data *sdata, u8 new_range) +{ + u8 new_mask_range; + s32 cntl1_val; + + if ((new_range != ETZKX_G_RANGE_2G) && + (new_range != ETZKX_G_RANGE_4G) && + (new_range != ETZKX_G_RANGE_6G) && + (new_range != ETZKX_G_RANGE_8G)) + return -EINVAL; + + cntl1_val = i2c_smbus_read_byte_data(sdata->client, ETZKX_REG_CNTL1); + if (cntl1_val < 0) + return cntl1_val; + cntl1_val &= ~ETZKX_CNTL1_G_MASK; + new_mask_range = (new_range / 2 - 1) << 5; + + cntl1_val = i2c_smbus_write_byte_data(sdata->client, ETZKX_REG_CNTL1, + new_mask_range | cntl1_val); + if (cntl1_val < 0) + return -EIO; + + sdata->range = new_range; + + return 0; +} + +/* get mutex lock before calling state functions */ +static int etzkx_state_go_stdby(struct etzkx_data *sdata) +{ + s32 cntl1_reg; + + cntl1_reg = i2c_smbus_read_byte_data(sdata->client, ETZKX_REG_CNTL1); + if (cntl1_reg < 0) + return cntl1_reg; + cntl1_reg &= ~ETZKX_CNTL1_PC_MASK; + cntl1_reg = i2c_smbus_write_byte_data(sdata->client, ETZKX_REG_CNTL1, + cntl1_reg); + if (cntl1_reg < 0) + return cntl1_reg; + + usleep_range(500, 700); + sdata->drv_state = ETZKX_STATE_STDBY; + sdata->stm1 = ETZKX_NO_STM_RUNNING; + sdata->stm2 = ETZKX_NO_STM_RUNNING; + + return 0; +} + +static int etzkx_state_go_active(struct etzkx_data *sdata) +{ + s32 reg; + + switch (sdata->drv_state) { + case ETZKX_STATE_STDBY: + reg = i2c_smbus_read_byte_data(sdata->client, ETZKX_REG_CNTL1); + reg &= ETZKX_CNTL1_G_MASK | ETZKX_CNTL1_ODR_MASK; + reg |= ETZKX_CNTL1_PC_MASK | sdata->odr << 2 | + (sdata->range / 2 - 1) << 5; + reg = i2c_smbus_write_byte_data(sdata->client, + ETZKX_REG_CNTL1, reg); + if (reg) + return reg; + + usleep_range(500, 600); + sdata->drv_state = ETZKX_STATE_ACTIVE; + + case ETZKX_STATE_SELF_TEST: + etzkx_state_disable_st(sdata); + case ETZKX_STATE_STRM: + etzkx_state_disable_streaming(sdata); + sdata->drv_state = ETZKX_STATE_ACTIVE; + return 0; + case ETZKX_STATE_STM_1: + return etzkx_state_disable_stm1(sdata, + etzkx_algos[sdata->stm1].stm_id); + case ETZKX_STATE_STM_2: + return etzkx_state_disable_stm2(sdata, + etzkx_algos[sdata->stm2].stm_id); + } + return -EPERM; +} + +static int etzkx_state_enable_streaming(struct etzkx_data *sdata) +{ + int err; + + if (sdata->drv_state & ETZKX_STATE_STRM) + return 0; + + switch (sdata->drv_state) { + case ETZKX_STATE_STDBY: + err = etzkx_state_go_active(sdata); + if (err) + return err; + case ETZKX_STATE_ACTIVE: + if (sdata->odr > ETZKX_ODR_100) { + err = etzkx_set_odr(sdata, ETZKX_ODR_100); + sdata->poll_rate = etzkx_rate_ms[ETZKX_ODR_100]; + } + schedule_delayed_work(&sdata->poll_read_work, + msecs_to_jiffies(sdata->poll_rate)); + sdata->drv_state = ETZKX_STATE_STRM; + return 0; + case ETZKX_STATE_SELF_TEST: + err = etzkx_state_disable_st(sdata); + return err ? err : 0; + case ETZKX_STATE_STM_1: + case ETZKX_STATE_STM_2: + case ETZKX_STATE_STM1_STM2: + schedule_delayed_work(&sdata->poll_read_work, + msecs_to_jiffies(sdata->poll_rate)); + sdata->drv_state |= ETZKX_STATE_STRM; + return 0; + } + return -EPERM; +} + +static int etzkx_state_disable_streaming(struct etzkx_data *sdata) +{ + int err; + + switch (sdata->drv_state) { + case ETZKX_STATE_POWER_OFF: + case ETZKX_STATE_STDBY: + case ETZKX_STATE_ACTIVE: + case ETZKX_STATE_STM_1: + case ETZKX_STATE_STM_2: + case ETZKX_STATE_STM1_STM2: + return 0; + case ETZKX_STATE_SELF_TEST: + err = etzkx_state_disable_st(sdata); + if (err) + return err; + case ETZKX_STATE_STRM: + case ETZKX_STATE_STRM_STM1: + case ETZKX_STATE_STRM_STM2: + case ETZKX_STATE_STRM_STM1_STM2: + cancel_delayed_work_sync(&sdata->poll_read_work); + sdata->drv_state = (sdata->drv_state == ETZKX_STATE_STRM) ? + ETZKX_STATE_ACTIVE : + (sdata->drv_state & ~ETZKX_STATE_STRM); + return 0; + } + + return -EPERM; +} + +static int etzkx_state_enable_st(struct etzkx_data *sdata) +{ + int reg; + + switch (sdata->drv_state) { + case ETZKX_STATE_STRM: + case ETZKX_STATE_POWER_OFF: + case ETZKX_STATE_STDBY: + reg = etzkx_state_go_active(sdata); + if (reg) + return reg; + case ETZKX_STATE_ACTIVE: + if (sdata->drv_state == ETZKX_STATE_STRM) + cancel_delayed_work_sync(&sdata->poll_read_work); + + if (sdata->odr > ETZKX_ODR_100) + return -EPERM; + + reg = i2c_smbus_read_byte_data(sdata->client, ETZKX_REG_CNTL4); + if (reg < 0) + return reg; + + reg |= ETZKX_CNTL4_STP_MASK; + reg = i2c_smbus_write_byte_data(sdata->client, + ETZKX_REG_CNTL4, reg); + if (reg < 0) + return reg; + /* + * schedule the polling 4 odr later, due to some + * hardware limitations + */ + schedule_delayed_work(&sdata->poll_read_work, + 4*msecs_to_jiffies(etzkx_rate_ms[sdata->odr])); + sdata->drv_state = ETZKX_STATE_SELF_TEST; + + return 0; + } + return -EPERM; +} + +static int etzkx_state_disable_st(struct etzkx_data *sdata) +{ + int reg; + + if (sdata->drv_state != ETZKX_STATE_SELF_TEST) + return 0; + + reg = i2c_smbus_read_byte_data(sdata->client, ETZKX_REG_CNTL4); + if (reg < 0) + return reg; + + reg &= ~ETZKX_CNTL4_STP_MASK; + reg = i2c_smbus_write_byte_data(sdata->client, ETZKX_REG_CNTL4, reg); + if (reg < 0) + return 0; + + sdata->drv_state = ETZKX_STATE_STRM; + + return 0; +} + +/* + * etzkx_select_stm - selects the desired state machine + * @sdata: running odr and g range value + * @stm_id: desired state machine + * @match_bitops: pointer to the bit operations that has the following meaning: + * + * 000: no stm found + * 001: g range and odr must be changed + * 011: g range must be changed + * 101: odr must be changed + * 111: the state machine can be applied without any change + * + * The return value is the index of the algo from the global algorithm vector. + * Lower than 0 if an error occured. + * + * The matchings have a different relevance that are weighed: + * 3: algo id (redundant) + * 2: odr + * 1: range + */ +static u8 etzkx_select_stm(struct etzkx_data *sdata, + int stm_id, u8 *match_bitops) +{ + u8 i, algo_idx; + u8 match, final_match; + + for (i = 0, match = 0, *match_bitops = 0, algo_idx = 0, final_match = 0; + (i < ARRAY_SIZE(etzkx_algos)) && + (*match_bitops != ETZKX_STM_MATCH_OK); + i++, match = 0) { + + if (etzkx_algos[i].stm_id != stm_id) + continue; + + match += 3; + if (match > final_match) { + *match_bitops |= ETZKX_STM_MATCH_ID; + algo_idx = i; + final_match = match; + } + + if ((etzkx_algos[i].odr == sdata->odr) || + (etzkx_algos[i].odr == ETZKX_ODR_DONT_CARE) || + ((sdata->odr == etzkx_rate_hz[ETZKX_ODR_1600]) && + (etzkx_algos[i].stm[ETZKX_ALGO_DES_IDX]))) { + + match += 2; + if (match > final_match) { + final_match = match; + algo_idx = i; + *match_bitops |= ETZKX_STM_MATCH_ODR; + } + } + + if ((etzkx_algos[i].range == sdata->range) || + (etzkx_algos[i].range == + ETZKX_G_RANGE_DONT_CARE)) { + match++; + if (match > final_match) { + final_match = match; + algo_idx = i; + *match_bitops |= ETZKX_STM_MATCH_RANGE; + } + } + } + + return algo_idx; +} + +static u8 etzkx_mask_orientation(struct etzkx_data *sdata, u8 val) +{ + int i; + u8 new_val = 0; + + if (!val) + return 0; + + for (i = 0; i < ETZKX_DIMENSION; i++) + if (sdata->mask_matrix[i] & val) + new_val |= (1 << (ETZKX_DIMENSION - 1 - i)); + + return new_val; +} + +static int __etzkx_switch_vfilter(struct etzkx_data *sdata, u8 stm_id, u8 onoff) +{ + s32 cntl4, err; + + cntl4 = i2c_smbus_read_byte_data(sdata->client, ETZKX_REG_CNTL4); + + if (onoff) { + err = i2c_smbus_write_i2c_block_data(sdata->client, + ETZKX_REG_VFC_1, 4, + etzkx_algos[stm_id].v); + if (err) + return err; + + cntl4 |= ETZKX_CNTL4_VFILT_MASK; + } else { + cntl4 &= ~ETZKX_CNTL4_VFILT_MASK; + } + + cntl4 = i2c_smbus_write_byte_data(sdata->client, + ETZKX_REG_CNTL4, cntl4); + + return (cntl4 < 0) ? cntl4 : 0; +} + +static int __etzkx_load_stm(struct etzkx_data *sdata, u8 stm_id, u8 offset) +{ + s32 err; + u8 mask[2]; + u8 idx; + + idx = !offset ? sdata->stm1 : sdata->stm2; + + if (etzkx_algos[stm_id].thrs3 && + (idx == ETZKX_NO_STM_RUNNING || !etzkx_algos[idx].thrs3)) { + + err = i2c_smbus_write_byte_data(sdata->client, ETZKX_REG_THRS3, + etzkx_algos[stm_id].thrs3); + if (err) + return err; + } + + if (*((u32 *) etzkx_algos[stm_id].v) && + (idx == ETZKX_NO_STM_RUNNING || + (*((u32 *) etzkx_algos[idx].v)))) + + etzkx_switch_on_vfilter(sdata, stm_id); + + err = i2c_smbus_write_i2c_block_data(sdata->client, + ETZKX_REG_ST1_1 + offset, + ETZKX_STM_LEN, + etzkx_algos[stm_id].stm); + if (err) + return err; + + + mask[0] = etzkx_mask_orientation(sdata, + etzkx_algos[stm_id].stm[ETZKX_ALGO_MASK_IDX]); + mask[1] = etzkx_mask_orientation(sdata, + etzkx_algos[stm_id].stm[ETZKX_ALGO_MASK_IDX+1]); + + err = i2c_smbus_write_i2c_block_data(sdata->client, + ETZKX_REG_SA_1 + offset, 2, mask); + + return (err < 0) ? err : 0; +} + +static int __etzkx_enable_stm(struct etzkx_data *sdata, u8 reg) +{ + int cntl1, cntl4, cntlx; + + cntl1 = i2c_smbus_read_byte_data(sdata->client, ETZKX_REG_CNTL1); + if (cntl1 < 0) + return cntl1; + cntlx = i2c_smbus_read_byte_data(sdata->client, reg); + if (cntlx < 0) + return cntlx; + cntl4 = i2c_smbus_read_byte_data(sdata->client, ETZKX_REG_CNTL4); + if (cntl4 < 0) + return cntl4; + + cntl1 |= ETZKX_CNTL1_IEN_MASK; + cntlx |= ETZKX_CNTLX_SMX_EN_MASK; + cntl4 |= ETZKX_CNTL4_IEA_MASK | ETZKX_CNTL4_IEL_MASK; /* pulsed irq */ + + if (reg == ETZKX_REG_CNTL2) + cntl4 |= ETZKX_CNTL4_INT1_EN_MASK; + else if (reg == ETZKX_REG_CNTL3) { + cntl4 |= ETZKX_CNTL4_INT2_EN_MASK; + cntlx |= ETZKX_CNTLX_SMX_PIN_MASK; + } else + return -EINVAL; + + cntl1 = i2c_smbus_write_byte_data(sdata->client, + ETZKX_REG_CNTL1, cntl1); + if (cntl1 < 0) + return cntl1; + cntl4 = i2c_smbus_write_byte_data(sdata->client, + ETZKX_REG_CNTL4, cntl4); + if (cntl4 < 0) + return cntl4; + cntlx = i2c_smbus_write_byte_data(sdata->client, reg, cntlx); + if (cntlx < 0) + return cntlx; + + return 0; +} + +static int __etzkx_disable_stm(struct etzkx_data *sdata, u8 reg) +{ + s32 cntlx; + + cntlx = i2c_smbus_read_byte_data(sdata->client, reg); + if (cntlx < 0) + return cntlx; + + cntlx &= ~ETZKX_CNTLX_SMX_EN_MASK; + cntlx = i2c_smbus_write_byte_data(sdata->client, reg, cntlx); + + return (cntlx) ? cntlx : 0; +} + +static int etzkx_set_stm_params(struct etzkx_data *sdata, + u8 match_bitops, u8 new_odr, u8 new_range) +{ + int ret; + u8 odr_back = sdata->odr; + sdata->range_back = sdata->range; + + /* + * '0' means that odr/range doesn't match with the running + * config, therefore, needs to be changed + */ + if (!(match_bitops & ETZKX_STM_MATCH_ODR)) { + ret = etzkx_set_odr(sdata, new_odr); + if (ret) + return ret; + } + + if (!(match_bitops & ETZKX_STM_MATCH_RANGE)) { + ret = etzkx_set_range(sdata, new_range); + if (ret) + goto restore_odr; + } + + return 0; + +restore_odr: + etzkx_set_odr(sdata, odr_back); + + return ret; +} + +static int __etzkx_state_enable_stm(struct etzkx_data *sdata, u8 i, u8 state) +{ + int ret; + + switch (state) { + case ETZKX_STATE_STM_1: + ret = etzkx_load_stm1(sdata, i); + return ret ? ret : etzkx_enable_stm1(sdata); + + case ETZKX_STATE_STM_2: + ret = etzkx_load_stm2(sdata, i); + return ret ? ret : etzkx_enable_stm2(sdata); + } + return -EINVAL; +} + +static int etzkx_move_stm_2_to_1(struct etzkx_data *sdata) +{ + int err; + + err = etzkx_disable_stm2(sdata); + if (err) + return err; + + err = etzkx_load_stm1(sdata, sdata->stm2); + if (err) + return err; + + err = etzkx_enable_stm1(sdata); + if (err) + return err; + + sdata->drv_state &= ~ETZKX_STATE_STM_2; + sdata->drv_state |= ETZKX_STATE_STM_1; + sdata->stm1 = sdata->stm2; + sdata->stm2 = ETZKX_NO_STM_RUNNING; + + return 0; +} + +static int etzkx_move_stm_1_to_2(struct etzkx_data *sdata) +{ + int err; + + err = etzkx_disable_stm1(sdata); + if (err) + return err; + + err = etzkx_load_stm2(sdata, sdata->stm1); + if (err) + return err; + + err = etzkx_enable_stm2(sdata); + if (err) + return err; + + sdata->drv_state &= ~ETZKX_STATE_STM_1; + sdata->drv_state |= ETZKX_STATE_STM_2; + sdata->stm2 = sdata->stm1; + sdata->stm1 = ETZKX_NO_STM_RUNNING; + + return 0; +} + +static int etzkx_state_enable_stm1(struct etzkx_data *sdata, u8 stm_id, u8 i) +{ + int ret; + u8 match_bitops; + + if (!i) { + i = etzkx_select_stm(sdata, stm_id, &match_bitops); + if (!match_bitops) + return 0; + } + + switch (sdata->drv_state) { + case ETZKX_STATE_STDBY: + ret = etzkx_state_go_active(sdata); + if (ret) + return ret; + + case ETZKX_STATE_ACTIVE: + case ETZKX_STATE_STRM: + if (match_bitops) { + ret = etzkx_set_stm_params(sdata, match_bitops, + etzkx_algos[i].odr, + etzkx_algos[i].range); + if (ret) + return ret; + } else if ((etzkx_algos[i].odr != sdata->odr) || + (etzkx_algos[i].range != sdata->range)) + return -EPERM; + + if ((etzkx_algos[i].stm[ETZKX_ALGO_DES_IDX]) || + (etzkx_algos[i].stm[ETZKX_ALGO_SETT_IDX] & + ETZKX_SETT_RADI_MASK)) + return etzkx_state_enable_stm2(sdata, stm_id, i); + + ret = __etzkx_state_enable_stm(sdata, i, ETZKX_STATE_STM_1); + if (ret) + return ret; + + sdata->drv_state = (sdata->drv_state == ETZKX_STATE_ACTIVE) ? + ETZKX_STATE_STM_1 : + ETZKX_STATE_STRM_STM1; + sdata->stm1 = i; + return 0; + + case ETZKX_STATE_STM_2: + case ETZKX_STATE_STRM_STM2: + if (etzkx_algos[i].range != sdata->range) + return -EPERM; + + if (ETZKX_ALGO_STM2(etzkx_algos[i].stm, sdata->odr) && + !ETZKX_ALGO_STM2(etzkx_algos[sdata->stm2].stm, + sdata->odr)) { + ret = etzkx_move_stm_2_to_1(sdata); + return ret ? ret : + etzkx_state_enable_stm2(sdata, stm_id, i); + } else if (sdata->odr != etzkx_algos[i].odr) { + return -EPERM; + } + + ret = __etzkx_state_enable_stm(sdata, i, ETZKX_STATE_STM_1); + if (ret) + return ret; + + sdata->drv_state = (sdata->drv_state == ETZKX_STATE_STM_2) ? + ETZKX_STATE_STM1_STM2 : + ETZKX_STATE_STRM_STM1_STM2; + sdata->stm1 = i; + return 0; + } + + return -EPERM; +} + +static int etzkx_state_enable_stm2(struct etzkx_data *sdata, u8 stm_id, u8 i) +{ + int ret; + u8 match_bitops; + + if (!i) { + i = etzkx_select_stm(sdata, stm_id, &match_bitops); + if (!match_bitops) + return 0; + } + + switch (sdata->drv_state) { + case ETZKX_STATE_STDBY: + ret = etzkx_state_go_active(sdata); + if (ret) + return ret; + + case ETZKX_STATE_ACTIVE: + case ETZKX_STATE_STRM: + if (match_bitops) { + ret = etzkx_set_stm_params(sdata, match_bitops, + etzkx_algos[i].odr, + etzkx_algos[i].range); + if (ret) + return ret; + } else if ((etzkx_algos[i].odr != sdata->odr) || + (etzkx_algos[i].range != sdata->range)) { + return -EPERM; + } + + ret = __etzkx_state_enable_stm(sdata, i, ETZKX_STATE_STM_2); + if (ret) + return ret; + + sdata->drv_state = (sdata->drv_state == ETZKX_STATE_ACTIVE) ? + ETZKX_STATE_STM_2 : + ETZKX_STATE_STRM_STM2; + sdata->stm2 = i; + return 0; + + case ETZKX_STATE_STM_1: + case ETZKX_STATE_STRM_STM1: + /* check if the selected stm is compatible with stm2 */ + if ((etzkx_algos[i].range != sdata->range) && + (etzkx_algos[i].range != ETZKX_G_RANGE_DONT_CARE)) + return -EPERM; + + if (!ETZKX_ALGO_STM2(etzkx_algos[i].stm, etzkx_algos[i].odr) && + ETZKX_ALGO_STM2(etzkx_algos[sdata->stm1].stm, + etzkx_rate_hz[ETZKX_ODR_1600])) { + if ((etzkx_algos[i].odr == + etzkx_rate_hz[ETZKX_ODR_1600]) && + (sdata->odr != + etzkx_rate_hz[ETZKX_ODR_1600])) { + + ret = etzkx_set_odr(sdata, + etzkx_rate_hz[ETZKX_ODR_1600]); + if (ret) + return ret; + } + ret = etzkx_move_stm_1_to_2(sdata); + return ret ? ret : + etzkx_state_enable_stm1(sdata, stm_id, i); + } else if ((etzkx_algos[i].odr != sdata->odr) && + (etzkx_algos[i].odr != ETZKX_ODR_DONT_CARE)) { + return -EPERM; + } + + ret = __etzkx_state_enable_stm(sdata, i, ETZKX_STATE_STM_2); + if (ret) + return ret; + + sdata->drv_state = (sdata->drv_state == ETZKX_STATE_STM_1) ? + ETZKX_STATE_STM1_STM2 : + ETZKX_STATE_STRM_STM1_STM2; + sdata->stm2 = i; + return 0; + } + + return -EPERM; +} + +static int etzkx_restore_after_stm(struct etzkx_data *sdata) +{ + int i, err; + + for (i = 0; + i < (ARRAY_SIZE(etzkx_rate_ms) - 2) && + (sdata->poll_rate < etzkx_rate_ms[i]); + i++) + ; + + err = etzkx_set_odr(sdata, i); + if (sdata->range != sdata->range_back) + err |= etzkx_set_range(sdata, sdata->range_back); + + return (err) ? err : 0; +} +static int etzkx_state_disable_stm1(struct etzkx_data *sdata, u8 stm_id) +{ + int err; + + if (sdata->stm1 == ETZKX_NO_STM_RUNNING) + return 0; + if (stm_id != etzkx_algos[sdata->stm1].stm_id) + return 0; + + switch (sdata->drv_state) { + case ETZKX_STATE_STDBY: + case ETZKX_STATE_ACTIVE: + return 0; + case ETZKX_STATE_STM_1: + case ETZKX_STATE_STRM_STM1: + err = etzkx_disable_stm1(sdata); + if (err) + return err; + + sdata->drv_state = (sdata->drv_state == ETZKX_STATE_STM_1) ? + ETZKX_STATE_ACTIVE : + ETZKX_STATE_STRM; + sdata->stm1 = ETZKX_NO_STM_RUNNING; + + return etzkx_restore_after_stm(sdata); + + case ETZKX_STATE_STM1_STM2: + case ETZKX_STATE_STRM_STM1_STM2: + err = etzkx_disable_stm1(sdata); + if (err) + return err; + + if (*((u32 *) etzkx_algos[sdata->stm1].v)) { + err = etzkx_switch_off_vfilter(sdata, sdata->stm2); + if (err) + return err; + } + + if ((etzkx_algos[sdata->stm1].odr == + etzkx_rate_hz[ETZKX_ODR_1600]) && + etzkx_algos[sdata->stm2].stm[ETZKX_ALGO_DES_IDX]) + + err = etzkx_set_odr(sdata, + etzkx_algos[sdata->stm2].odr); + + else if (etzkx_algos[sdata->stm2].odr == ETZKX_ODR_DONT_CARE) + err = etzkx_restore_after_stm(sdata); + + sdata->drv_state = (sdata->drv_state == ETZKX_STATE_STM1_STM2) ? + ETZKX_STATE_STM_2 : + ETZKX_STATE_STRM_STM2; + sdata->stm1 = ETZKX_NO_STM_RUNNING; + + return err; + } + + return -EPERM; +} + +static int etzkx_state_disable_stm2(struct etzkx_data *sdata, u8 stm_id) +{ + int err; + + if (sdata->stm2 == ETZKX_NO_STM_RUNNING) + return 0; + if (stm_id != etzkx_algos[sdata->stm2].stm_id) + return 0; + + switch (sdata->drv_state) { + case ETZKX_STATE_STDBY: + case ETZKX_STATE_ACTIVE: + return 0; + case ETZKX_STATE_STM_2: + case ETZKX_STATE_STRM_STM2: + err = etzkx_disable_stm2(sdata); + if (err < 0) + return err; + + sdata->drv_state = (sdata->drv_state == ETZKX_STATE_STM_2) ? + ETZKX_STATE_ACTIVE : + ETZKX_STATE_STRM; + sdata->stm2 = ETZKX_NO_STM_RUNNING; + + return etzkx_restore_after_stm(sdata); + + case ETZKX_STATE_STM1_STM2: + case ETZKX_STATE_STRM_STM1_STM2: + err = etzkx_disable_stm2(sdata); + if (err) + return err; + + if (etzkx_algos[sdata->stm1].odr == ETZKX_ODR_DONT_CARE) { + err = etzkx_restore_after_stm(sdata); + if (err) + return err; + } + + if (*((u32 *) etzkx_algos[sdata->stm2].v)) + err = etzkx_switch_off_vfilter(sdata, sdata->stm2); + + sdata->drv_state = (sdata->drv_state == ETZKX_STATE_STM1_STM2) ? + ETZKX_STATE_STM_1 : + ETZKX_STATE_STRM_STM1; + sdata->stm2 = ETZKX_NO_STM_RUNNING; + + return err; + } + + return -EPERM; +} + +static void etzkx_report_xyz(struct input_dev *dev, int *xyz) +{ + input_report_abs(dev, ABS_X, xyz[0]); + input_report_abs(dev, ABS_Y, xyz[1]); + input_report_abs(dev, ABS_Z, xyz[2]); + input_sync(dev); +} + +static int etzkx_read_xyz(struct etzkx_data *sdata, int *xyz) +{ + + int err; + u8 reg_xyz[6]; + s16 raw_xyz[3] = { 0 }; + + err = i2c_smbus_read_i2c_block_data(sdata->client, ETZKX_REG_OUTX_L, + 6, reg_xyz); + if (err != 6) + return -EIO; + + raw_xyz[0] = ((s16) ((reg_xyz[1] << 8) | reg_xyz[0])); + raw_xyz[1] = ((s16) ((reg_xyz[3] << 8) | reg_xyz[2])); + raw_xyz[2] = ((s16) ((reg_xyz[5] << 8) | reg_xyz[4])); + + xyz[0] = ((sdata->pdata->x_negate) ? (-raw_xyz[sdata->pdata->x_map]) + : (raw_xyz[sdata->pdata->x_map])); + xyz[1] = ((sdata->pdata->y_negate) ? (-raw_xyz[sdata->pdata->y_map]) + : (raw_xyz[sdata->pdata->y_map])); + xyz[2] = ((sdata->pdata->z_negate) ? (-raw_xyz[sdata->pdata->z_map]) + : (raw_xyz[sdata->pdata->z_map])); + + return 0; +} + +static void etzkx_poll_read_work(struct work_struct *work) +{ + int err; + int xyz[3]; + struct etzkx_data *etzkx = container_of((struct delayed_work *) work, + struct etzkx_data, poll_read_work); + + err = etzkx_read_xyz(etzkx, xyz); + if (err) { + dev_err(&etzkx->client->dev, "i2c read/write error\n"); + mutex_lock(&etzkx->mutex); + etzkx_state_disable_streaming(etzkx); + mutex_unlock(&etzkx->mutex); + } else { + etzkx_report_xyz(etzkx->input_dev, xyz); + } + + if (etzkx->drv_state & (ETZKX_STATE_STRM | ETZKX_STATE_SELF_TEST)) { + schedule_delayed_work(&etzkx->poll_read_work, + msecs_to_jiffies(etzkx->poll_rate)); + } +} + +static int etzkx_stm_handle(struct etzkx_data *sdata, u8 i, u8 outs) +{ + switch (etzkx_algos[i].stm_id) { + case ETZKX_STM_ID_TIMING: + sdata->running_stm.id = ETZKX_STM_ID_TIMING; + break; + case ETZKX_STM_ID_ORIENTATION: + sdata->running_stm.id = ETZKX_STM_ID_ORIENTATION; + switch (outs) { + case ETZKX_ORIENTATION_PORTRAIT: + sdata->running_stm.algo.portrait = 1; + sdata->running_stm.algo.landscape = 0; + break; + case ETZKX_ORIENTATION_LANDSCAPE: + sdata->running_stm.algo.portrait = 0; + sdata->running_stm.algo.landscape = 1; + break; + } + break; + case ETZKX_STM_ID_DOUBLE_TAP: + sdata->running_stm.id = ETZKX_STM_ID_DOUBLE_TAP; + switch (outs) { + case ETZKX_DOUBLE_TAP_PLUS_X: + sdata->running_stm.algo.x = 1; + sdata->running_stm.algo.y = 0; + sdata->running_stm.algo.z = 0; + sdata->running_stm.algo.peak = 0; + break; + case ETZKX_DOUBLE_TAP_MINUS_X: + sdata->running_stm.algo.x = 2; + sdata->running_stm.algo.y = 0; + sdata->running_stm.algo.z = 0; + sdata->running_stm.algo.peak = 0; + break; + case ETZKX_DOUBLE_TAP_PLUS_Y: + sdata->running_stm.algo.x = 0; + sdata->running_stm.algo.y = 1; + sdata->running_stm.algo.z = 0; + sdata->running_stm.algo.peak = 0; + break; + case ETZKX_DOUBLE_TAP_MINUS_Y: + sdata->running_stm.algo.x = 0; + sdata->running_stm.algo.y = 2; + sdata->running_stm.algo.z = 0; + sdata->running_stm.algo.peak = 0; + break; + case ETZKX_DOUBLE_TAP_PLUS_Z: + sdata->running_stm.algo.x = 0; + sdata->running_stm.algo.y = 0; + sdata->running_stm.algo.z = 1; + sdata->running_stm.algo.peak = 0; + break; + case ETZKX_DOUBLE_TAP_MINUS_Z: + sdata->running_stm.algo.x = 0; + sdata->running_stm.algo.y = 0; + sdata->running_stm.algo.z = 2; + sdata->running_stm.algo.peak = 0; + break; + } + break; + case ETZKX_STM_ID_WAKEUP: + sdata->running_stm.id = ETZKX_STM_ID_WAKEUP; + sdata->running_stm.algo.sleep = !outs; + sdata->running_stm.algo.wakeup = + !sdata->running_stm.algo.sleep; + break; + case ETZKX_STM_ID_V_DOUBLE_TAP: + sdata->running_stm.id = ETZKX_STM_ID_V_DOUBLE_TAP; + sdata->running_stm.algo.vtap = 1; + break; + default: + return 0; + } + + wake_up_interruptible(&sdata->wq); + return 0; +} + +static irqreturn_t etzkx_irq_handler(int irq, void *dev) +{ + struct etzkx_data *sdata = dev; + s32 outs; + u8 masked_outs; + + if (irq == sdata->pdata->irq1) { + outs = i2c_smbus_read_byte_data(sdata->client, + ETZKX_REG_OUTS_1); + masked_outs = etzkx_mask_orientation(sdata, outs); + etzkx_stm_handle(dev, sdata->stm1, masked_outs); + } else if (irq == sdata->pdata->irq2) { + outs = i2c_smbus_read_byte_data(sdata->client, + ETZKX_REG_OUTS_2); + masked_outs = etzkx_mask_orientation(sdata, outs); + etzkx_stm_handle(dev, sdata->stm2, masked_outs); + } + + return IRQ_HANDLED; +} + +static int etzkx_hw_detect(struct etzkx_data *sdata) +{ + int err; + u8 wai_reg[3]; + + err = i2c_smbus_read_i2c_block_data(sdata->client, ETZKX_REG_INFO1, + 3, wai_reg); + if (err < 0) + return err; + if (err != 3) + return -EIO; + + switch (wai_reg[2]) { + case ETZKX_WIA_LISN3DSH: + dev_info(&sdata->client->dev, + "ST lisn3dsh vers. %u accelerometer detected\n", + wai_reg[0]); + break; + + case ETZKX_WIA_KXTNK: + dev_info(&sdata->client->dev, + "Kionix kxtnk-1000 vers %u accelerometer detected\n", + wai_reg[0]); + break; + + case ETZKX_WIA_KXCNL: + dev_info(&sdata->client->dev, + "Kionix kxcnl-1010 vers %u accelerometer detected\n", + wai_reg[0]); + break; + + default: + return -ENODEV; + } + + sdata->wai = wai_reg[2]; + sdata->hw_version = wai_reg[0]; + + return 0; +} + +static ssize_t etzkx_sysfs_read_hwid(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct etzkx_data *sdata = dev_get_drvdata(dev); + + switch (sdata->wai) { + case ETZKX_WIA_LISN3DSH: + return sprintf(buf, "lisn3dsh (%u)\n", sdata->hw_version); + case ETZKX_WIA_KXTNK: + return sprintf(buf, "kxtnk-1000 (%u)\n", sdata->hw_version); + case ETZKX_WIA_KXCNL: + return sprintf(buf, "kxcnl-1010 (%u)\n", sdata->hw_version); + } + + return -ENODEV; +} + +static ssize_t etzkx_sysfs_get_strm(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct etzkx_data *sdata = dev_get_drvdata(dev); + + return sprintf(buf, "%u\n", !!(sdata->drv_state & ETZKX_STATE_STRM)); +} + +static ssize_t etzkx_sysfs_set_strm(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + int err; + unsigned long value; + struct etzkx_data *sdata = dev_get_drvdata(dev); + + if (kstrtoul(buf, 0, &value)) + return -EINVAL; + + mutex_lock(&sdata->mutex); + if (value) + err = etzkx_state_enable_streaming(sdata); + else + err = etzkx_state_disable_streaming(sdata); + mutex_unlock(&sdata->mutex); + + return (err < 0) ? err : len; +} + +static ssize_t etzkx_sysfs_get_odr(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct etzkx_data *sdata = dev_get_drvdata(dev); + + return sprintf(buf, "%s\n", etzkx_rate_str[sdata->odr]); +} + +static ssize_t etzkx_sysfs_set_odr(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + unsigned long value; + int ret, i; + struct etzkx_data *sdata = dev_get_drvdata(dev); + + if (kstrtoul(buf, 0, &value)) + return -EINVAL; + /* + * odr = 1600 Hz is not allowed for streaming + * 1600Hz should be set only for state machine purpose + */ + + if ((sdata->stm1 != ETZKX_NO_STM_RUNNING) || + (sdata->stm2 != ETZKX_NO_STM_RUNNING)) + return -EPERM; + + for (i = 0; + (i < ARRAY_SIZE(etzkx_rate_hz)) && (value >= etzkx_rate_hz[i]); + i++) + ; + + mutex_lock(&sdata->mutex); + if (i == 0) + ret = etzkx_set_odr(sdata, i); + else + ret = etzkx_set_odr(sdata, i-1); + if (etzkx_rate_ms[sdata->odr] < etzkx_rate_ms[ETZKX_ODR_100]) + sdata->poll_rate = etzkx_rate_ms[ETZKX_ODR_100]; + else + sdata->poll_rate = etzkx_rate_ms[sdata->odr]; + mutex_unlock(&sdata->mutex); + + return (ret < 0) ? ret : len; +} + +static ssize_t etzkx_sysfs_set_poll_rate(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + int i, err = 0; + unsigned long value; + struct etzkx_data *sdata = dev_get_drvdata(dev); + + if (kstrtoul(buf, 0, &value)) + return -EINVAL; + + /* doesn't allow polling rates faster than 10 ms */ + if (value < etzkx_rate_ms[ETZKX_ODR_100]) + value = etzkx_rate_ms[ETZKX_ODR_100]; + /* doesn't allow polling rates slower than 65535 ms */ + if (value > ETZKX_MAX_POLL_RATE) + value = ETZKX_MAX_POLL_RATE; + + for (i = 0; + i < ARRAY_SIZE(etzkx_rate_ms) && (value < etzkx_rate_ms[i]); + i++) + ; + + /* + * set the device frequency one step lower + * that the polling rate frequency + */ + mutex_lock(&sdata->mutex); + if ((sdata->stm1 == ETZKX_NO_STM_RUNNING) && + sdata->stm2 == ETZKX_NO_STM_RUNNING) { + if (i > ETZKX_ODR_100) + err = etzkx_set_odr(sdata, ETZKX_ODR_100); + else + err = etzkx_set_odr(sdata, i); + } + if (!err) { + cancel_delayed_work_sync(&sdata->poll_read_work); + sdata->poll_rate = value; + if (sdata->drv_state & ETZKX_STATE_STRM) + schedule_delayed_work(&sdata->poll_read_work, + msecs_to_jiffies(sdata->poll_rate)); + } + mutex_unlock(&sdata->mutex); + + return (err < 0) ? err : len; +} + +static ssize_t etzkx_sysfs_get_poll_rate(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct etzkx_data *sdata = dev_get_drvdata(dev); + + return sprintf(buf, "%u\n", sdata->poll_rate); +} + +static ssize_t etzkx_sysfs_get_range(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct etzkx_data *sdata = dev_get_drvdata(dev); + + return sprintf(buf, "%u\n", sdata->range); +} + +static ssize_t etzkx_sysfs_set_range(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + ssize_t ret; + unsigned long value; + struct etzkx_data *sdata = dev_get_drvdata(dev); + + if (kstrtoul(buf, 0, &value)) + return -EINVAL; + + if ((sdata->stm1 != ETZKX_NO_STM_RUNNING) || + (sdata->stm2 != ETZKX_NO_STM_RUNNING)) + return -EPERM; + + mutex_lock(&sdata->mutex); + ret = etzkx_set_range(sdata, value); + mutex_unlock(&sdata->mutex); + + return (ret < 0) ? ret : len; +} + +static ssize_t etzkx_sysfs_get_st(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct etzkx_data *sdata = dev_get_drvdata(dev); + + return sprintf(buf, "%u\n", + !!(sdata->drv_state & ETZKX_STATE_SELF_TEST)); +} + +static ssize_t etzkx_sysfs_set_st(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + int ret; + unsigned long value; + struct etzkx_data *sdata = dev_get_drvdata(dev); + + if (kstrtoul(buf, 0, &value)) + return -EINVAL; + + mutex_lock(&sdata->mutex); + if (value) + ret = etzkx_state_enable_st(sdata); + else + ret = etzkx_state_disable_st(sdata); + + mutex_unlock(&sdata->mutex); + + return (ret < 0) ? ret : len; +} + +static ssize_t etzkx_sysfs_read_version(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return sprintf(buf, "%u\n", ETZKX_DRV_VERSION); +} + +static DEVICE_ATTR(hwid, S_IRUGO, etzkx_sysfs_read_hwid, NULL); +static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, + etzkx_sysfs_get_strm, etzkx_sysfs_set_strm); +static DEVICE_ATTR(odr, S_IRUGO | S_IWUSR, + etzkx_sysfs_get_odr, etzkx_sysfs_set_odr); +static DEVICE_ATTR(delay, S_IRUGO | S_IWUSR, + etzkx_sysfs_get_poll_rate, etzkx_sysfs_set_poll_rate); +static DEVICE_ATTR(range, S_IRUGO | S_IWUSR, + etzkx_sysfs_get_range, etzkx_sysfs_set_range); +static DEVICE_ATTR(self_test, S_IRUGO | S_IWUSR, + etzkx_sysfs_get_st, etzkx_sysfs_set_st); +static DEVICE_ATTR(drv_version, S_IRUGO, etzkx_sysfs_read_version, NULL); + +static struct attribute *sysfs_attrs[] = { + &dev_attr_hwid.attr, + &dev_attr_enable.attr, + &dev_attr_odr.attr, + &dev_attr_delay.attr, + &dev_attr_range.attr, + &dev_attr_self_test.attr, + &dev_attr_drv_version.attr, + NULL +}; + +static struct attribute_group etzkx_attribute_group = { + .attrs = sysfs_attrs +}; + +static int etzkx_chardev_open(struct inode *inode, struct file *file) +{ + struct etzkx_data *sdata = + container_of(inode->i_cdev, struct etzkx_data, cdev); + + file->private_data = sdata; + + return 0; +} + +static int etzkx_chardev_release(struct inode *inode, struct file *file) +{ + return 0; +} + +static ssize_t etzkx_chardev_read(struct file *file, char __user *buffer, + size_t length, loff_t *offset) +{ + int ret; + struct etzkx_data *sdata = file->private_data; + + ret = wait_event_interruptible(sdata->wq, sdata->running_stm.id); + if (ret != 0) + return ret; + + ret = copy_to_user(buffer, &sdata->running_stm, + sizeof(sdata->running_stm)); + if (ret != 0) + ret = -EFAULT; + + mutex_lock(&sdata->mutex); + sdata->running_stm.id = ETZKX_STM_ID_NO_STM; + mutex_unlock(&sdata->mutex); + + return ret; +} + +static ssize_t etzkx_chardev_write(struct file *file, + const char __user *buffer, size_t length, loff_t *offset) +{ + return 0; +} + +static unsigned int etzkx_chardev_poll(struct file *file, + struct poll_table_struct *wait) +{ + struct etzkx_data *sdata = file->private_data; + poll_wait(file, &sdata->wq, wait); + + return (sdata->running_stm.id) ? (POLLIN | POLLRDNORM) : 0; +} + +static long etzkx_chardev_ioctl(struct file *file, unsigned int cmd, + unsigned long arg) +{ + s32 pc; + int err = 0; + int reg_xyz[3]; + s16 range_mult; + struct etzkx_stm_data info; + int (*etzkx_state_enable_stm)(struct etzkx_data*, u8, u8); + struct etzkx_data *sdata = file->private_data; + + /* switch on the latest two bits of cmd */ + switch ((cmd >> _IOC_NRSHIFT) & 0x03) { + case ETZKXIO_ENABLE: + /* + * check if there are free slots and if the + * requested state machine is already running + */ + + if (sdata->stm1 == ETZKX_NO_STM_RUNNING) { + if (sdata->stm2 != ETZKX_NO_STM_RUNNING && + etzkx_algos[sdata->stm2].stm_id == + (((cmd & 0xFF) >> _IOC_NRSHIFT) >> 2)) + return -EPERM; + + etzkx_state_enable_stm = etzkx_state_enable_stm1; + + } else if (sdata->stm2 == ETZKX_NO_STM_RUNNING) { + if (sdata->stm1 != ETZKX_NO_STM_RUNNING && + etzkx_algos[sdata->stm1].stm_id == + (((cmd & 0xFF) >> _IOC_NRSHIFT) >> 2)) + return -EPERM; + + etzkx_state_enable_stm = etzkx_state_enable_stm2; + + } else { + return -EPERM; + } + + mutex_lock(&sdata->mutex); + switch (cmd) { + case ETZKXIO_ENABLE_TIMING: + err = etzkx_state_enable_stm(sdata, + ETZKX_STM_ID_TIMING, 0); + break; + case ETZKXIO_ENABLE_ORIENTATION: + err = etzkx_state_enable_stm(sdata, + ETZKX_STM_ID_ORIENTATION, 0); + break; + case ETZKXIO_ENABLE_DOUBLE_TAP: + err = etzkx_state_enable_stm(sdata, + ETZKX_STM_ID_DOUBLE_TAP, 0); + break; + case ETZKXIO_ENABLE_WAKEUP: + err = etzkx_state_enable_stm(sdata, + ETZKX_STM_ID_WAKEUP, 0); + break; + case ETZKXIO_ENABLE_V_DOUBLE_TAP: + err = etzkx_state_enable_stm(sdata, + ETZKX_STM_ID_V_DOUBLE_TAP, 0); + break; + default: + err = -EINVAL; + } + break; + + case ETZKXIO_DISABLE: + /* get the algo id from the ioctl command */ + cmd = (cmd & 0xFF) >> 2; + mutex_lock(&sdata->mutex); + if ((sdata->stm1 != ETZKX_NO_STM_RUNNING) && + (etzkx_algos[sdata->stm1].stm_id == cmd)) + err = etzkx_state_disable_stm1(sdata, + etzkx_algos[sdata->stm1].stm_id); + + else if ((sdata->stm2 != ETZKX_NO_STM_RUNNING) && + (etzkx_algos[sdata->stm2].stm_id == cmd)) + err = etzkx_state_disable_stm2(sdata, + etzkx_algos[sdata->stm2].stm_id); + else + err = -EINVAL; + break; + + case ETZKXIO_STATE: + mutex_lock(&sdata->mutex); + switch (cmd) { + case ETZKXIO_WHICH_ORIENTATION: + if ((sdata->stm1 != ETZKX_NO_STM_RUNNING) && + (etzkx_algos[sdata->stm1].stm_id == + ETZKX_STM_ID_ORIENTATION)) { + + pc = i2c_smbus_read_byte_data(sdata->client, + ETZKX_REG_PR_1); + if (pc < 0) { + err = pc; + goto ioctl_err; + } + } else if ((sdata->stm2 != ETZKX_NO_STM_RUNNING) && + (etzkx_algos[sdata->stm2].stm_id == + ETZKX_STM_ID_ORIENTATION)) { + pc = i2c_smbus_read_byte_data(sdata->client, + ETZKX_REG_PR_2); + if (pc < 0) { + err = pc; + goto ioctl_err; + } + /* + * address register gap between + * addresses for stm1 and stm2 + */ + pc -= ETZKX_STM_REG_GAP; + } else { + err = -EINVAL; + goto ioctl_err; + } + + info.id = ETZKX_STM_ID_ORIENTATION; + info.algo.portrait = (pc <= ETZKX_REG_ST7_1); + info.algo.landscape = !info.algo.portrait; + + if (copy_to_user((void __user *) arg, + &info, sizeof(info))) + err = -EFAULT; + break; + + case ETZKXIO_INSTANT_ORIENTATION: + if (sdata->drv_state == ETZKX_STATE_STDBY) { + err = -EFAULT; + goto ioctl_err; + } + + if (sdata->range == ETZKX_G_RANGE_DONT_CARE) { + err = -EINVAL; + goto ioctl_err; + } + + err = etzkx_read_xyz(sdata, reg_xyz); + if (err) + goto ioctl_err; + + range_mult = ETZKX_MAX_RANGE / sdata->range; + info.id = ETZKX_STM_ID_ORIENTATION; + info.algo.landscape = ((reg_xyz[1] < + ETZKX_ORIENTATION_LIMIT * range_mult) && + (abs(reg_xyz[0]) > + ETZKX_ORIENTATION_LIMIT * range_mult)); + info.algo.portrait = !info.algo.landscape; + + if (copy_to_user((void __user *) arg, + &info, sizeof(info))) + err = -EFAULT; + + break; + + case ETZKXIO_RUNNING_ALGO: + info.id = ETZKX_STM_ID_NO_STM; + info.algo.stm1 = + (sdata->stm1 == ETZKX_NO_STM_RUNNING) ? + ETZKX_STM_ID_NO_STM : + etzkx_algos[sdata->stm1].stm_id; + info.algo.stm2 = + (sdata->stm2 == ETZKX_NO_STM_RUNNING) ? + ETZKX_STM_ID_NO_STM : + etzkx_algos[sdata->stm2].stm_id; + + if (copy_to_user((void __user *) arg, + &info, sizeof(info))) + err = -EFAULT; + break; + + default: + err = -EINVAL; + } + break; + + default: + return -EINVAL; + } + +ioctl_err: + mutex_unlock(&sdata->mutex); + return err; +} + +static const struct file_operations etzkx_chardev_fops = { + .owner = THIS_MODULE, + .open = etzkx_chardev_open, + .release = etzkx_chardev_release, + .read = etzkx_chardev_read, + .write = etzkx_chardev_write, + .poll = etzkx_chardev_poll, + .unlocked_ioctl = etzkx_chardev_ioctl, +}; + +static int etzkx_input_register_device(struct etzkx_data *sdata) +{ + int err; + + sdata->input_dev = input_allocate_device(); + if (!sdata->input_dev) + return -ENOMEM; + + sdata->input_dev->name = ETZKX_DEV_NAME; + sdata->input_dev->id.bustype = BUS_I2C; + sdata->input_dev->id.vendor = sdata->wai; + sdata->input_dev->id.version = sdata->hw_version; + sdata->input_dev->dev.parent = &sdata->client->dev; + + set_bit(EV_ABS, sdata->input_dev->evbit); + input_set_abs_params(sdata->input_dev, ABS_X, INT_MIN, INT_MAX, 0, 0); + input_set_abs_params(sdata->input_dev, ABS_Y, INT_MIN, INT_MAX, 0, 0); + input_set_abs_params(sdata->input_dev, ABS_Z, INT_MIN, INT_MAX, 0, 0); + + err = input_register_device(sdata->input_dev); + if (err) + return err; + + return 0; +} + +static void etzkx_input_cleanup(struct etzkx_data *sdata) +{ + input_unregister_device(sdata->input_dev); +} + +static int etzkx_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + int err; + struct etzkx_data *sdata; + + if (client->dev.platform_data == NULL) { + dev_err(&client->dev, "no platform data declared\n"); + return -ENODEV; + } + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_I2C_BLOCK)) { + dev_err(&client->dev, + "no algorithm associated to the i2c bus\n"); + return -ENODEV; + } + + sdata = devm_kzalloc(&client->dev, + sizeof(struct etzkx_data), GFP_KERNEL); + if (!sdata) { + dev_err(&client->dev, "no memory available\n"); + return -ENOMEM; + } + + mutex_init(&sdata->mutex); + mutex_lock(&sdata->mutex); + + sdata->client = client; + i2c_set_clientdata(client, sdata); + + sdata->pdata = client->dev.platform_data; + + msleep(50); + + err = etzkx_hw_detect(sdata); + if (err) { + dev_err(&client->dev, "device not recognized\n"); + goto free_stmt; + } + + if (sdata->pdata->init) { + err = sdata->pdata->init(); + if (err) { + dev_err(&client->dev, + "impossible to initialize the device\n"); + goto free_stmt; + } + } + + err = etzkx_input_register_device(sdata); + if (err < 0) { + dev_err(&client->dev, + "impossible to associate the device to an event\n"); + goto free_src; + } + + err = sysfs_create_group(&sdata->client->dev.kobj, + &etzkx_attribute_group); + if (err) { + dev_err(&client->dev, + "impossible to allocate sysfs resources\n"); + goto free_input; + } + + err = alloc_chrdev_region(&etzkx_dev_number, 0, 1, ETZKX_CHARDEV_NAME); + if (err) + dev_err(&client->dev, "cannot register device\n"); + + etzkx_class = class_create(THIS_MODULE, ETZKX_CHARDEV_NAME); + cdev_init(&sdata->cdev, &etzkx_chardev_fops); + sdata->cdev.owner = THIS_MODULE; + + err = cdev_add(&sdata->cdev, etzkx_dev_number, 1); + if (err) + dev_err(&client->dev, "cannot register device\n"); + + device_create(etzkx_class, NULL, MKDEV(MAJOR(etzkx_dev_number), 0), + NULL, ETZKX_CHARDEV_NAME); + + init_waitqueue_head(&sdata->wq); + + if (sdata->pdata->irq1) { + err = request_threaded_irq(sdata->pdata->irq1, NULL, + etzkx_irq_handler, IRQF_TRIGGER_RISING, + "etzkx_irq1", sdata); + if (err) { + dev_err(&client->dev, "unable to request irq1\n"); + goto free_sysfs; + } + } + + if (sdata->pdata->irq2) { + err = request_threaded_irq(sdata->pdata->irq2, NULL, + etzkx_irq_handler, IRQF_TRIGGER_RISING, + "etzkx_irq2", sdata); + if (err) { + dev_err(&client->dev, "unable to request irq2\n"); + goto free_irq1; + } + } + + if ((sdata->pdata->odr >= ETZKX_ODR_3_125) && + (sdata->pdata->odr <= ETZKX_ODR_1600)) + sdata->odr = sdata->pdata->odr; + else + sdata->odr = ETZKX_DEFAULT_ODR; + if (sdata->pdata->range != ETZKX_G_RANGE_2G && + sdata->pdata->range != ETZKX_G_RANGE_4G && + sdata->pdata->range != ETZKX_G_RANGE_6G && + sdata->pdata->range != ETZKX_G_RANGE_8G) + sdata->range = ETZKX_DEFAULT_G_RANGE; + else + sdata->range = sdata->pdata->range; + sdata->poll_rate = etzkx_rate_ms[sdata->odr]; + err = etzkx_state_go_stdby(sdata); + if (err) { + dev_err(&client->dev, "unable to switch on the device\n"); + goto free_irq2; + } + + /* build mask matrix */ + sdata->mask_matrix[0] = 1 << + (ETZKX_DIMENSION - (sdata->pdata->x_map + 1) * 2 + + !sdata->pdata->x_negate); + sdata->mask_matrix[1] = 1 << + (ETZKX_DIMENSION - (sdata->pdata->x_map + 1) * 2 + + sdata->pdata->x_negate); + sdata->mask_matrix[2] = 1 << + (ETZKX_DIMENSION - (sdata->pdata->y_map + 1) * 2 + + !sdata->pdata->y_negate); + sdata->mask_matrix[3] = 1 << + (ETZKX_DIMENSION - (sdata->pdata->y_map + 1) * 2 + + sdata->pdata->y_negate); + sdata->mask_matrix[4] = 1 << + (ETZKX_DIMENSION - (sdata->pdata->z_map + 1) * 2 + + !sdata->pdata->z_negate); + sdata->mask_matrix[5] = 1 << + (ETZKX_DIMENSION - (sdata->pdata->z_map + 1) * 2 + + sdata->pdata->z_negate); + sdata->mask_matrix[6] = 2; + sdata->mask_matrix[7] = 1; + + INIT_DELAYED_WORK(&sdata->poll_read_work, etzkx_poll_read_work); + + mutex_unlock(&sdata->mutex); + + return 0; + +free_irq2: + if (sdata->pdata->irq2) + free_irq(sdata->pdata->irq2, sdata); +free_irq1: + if (sdata->pdata->irq1) + free_irq(sdata->pdata->irq1, sdata); +free_sysfs: + sysfs_remove_group(&sdata->client->dev.kobj, &etzkx_attribute_group); +free_input: + etzkx_input_cleanup(sdata); +free_src: + if (sdata->pdata->release) + sdata->pdata->release(); +free_stmt: + mutex_unlock(&sdata->mutex); + + return err; +} + +static int etzkx_remove(struct i2c_client *client) +{ + struct etzkx_data *sdata = i2c_get_clientdata(client); + + sysfs_remove_group(&sdata->client->dev.kobj, &etzkx_attribute_group); + + unregister_chrdev_region(etzkx_dev_number, 1); + device_destroy(etzkx_class, MKDEV(MAJOR(etzkx_dev_number), 0)); + cdev_del(&sdata->cdev); + class_destroy(etzkx_class); + + if (sdata->pdata->irq2) + free_irq(sdata->pdata->irq2, sdata); + + if (sdata->pdata->irq1) + free_irq(sdata->pdata->irq1, sdata); + + if (sdata->drv_state & ETZKX_STATE_STRM) + cancel_delayed_work_sync(&sdata->poll_read_work); + + etzkx_input_cleanup(sdata); + + if (sdata->pdata->release) + sdata->pdata->release(); + + return 0; +} + +#ifdef CONFIG_PM +static int etzkx_suspend(struct device *dev) +{ + return 0; +} + +static int etzkx_resume(struct device *dev) +{ + return 0; +} +#else +#define etzkx_suspend NULL +#define etzkx_resume NULL +#endif + +#ifdef CONFIG_PM_RUNTIME +static int etzkx_runtime_suspend(struct device *dev) +{ + return 0; +} + +static int etzkx_runtime_resume(struct device *dev) +{ + return 0; +} +#else +#define etzkx_runtime_suspend NULL +#define etzkx_runtime_resume NULL +#endif + +static const struct i2c_device_id etzkx_id[] = { + { ETZKX_DEV_NAME, 0 }, + { ETZKX_LISN3DSH_NAME, 0 }, + { ETZKX_KXTNK_NAME, 0 }, + { }, + }; + +MODULE_DEVICE_TABLE(i2c, etzkx_id); + +static const struct dev_pm_ops etzkx_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(etzkx_suspend, etzkx_resume) + SET_RUNTIME_PM_OPS(etzkx_runtime_suspend, etzkx_runtime_resume, NULL) +}; + +static struct i2c_driver etzkx_driver = { + .driver = { + .owner = THIS_MODULE, + .name = ETZKX_DEV_NAME, + .pm = &etzkx_pm_ops, + }, + .probe = etzkx_probe, + .remove = etzkx_remove, + .id_table = etzkx_id, +}; + +module_i2c_driver(etzkx_driver); + +MODULE_DESCRIPTION("State Machine Interrupt Driven Accelerometer"); +MODULE_AUTHOR("Andi Shyti"); +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/i2c/etzkx.h b/include/linux/i2c/etzkx.h new file mode 100644 index 0000000..23bab6d --- /dev/null +++ b/include/linux/i2c/etzkx.h @@ -0,0 +1,157 @@ +/* + * etzkx: lisn3dsh/kxtnk 3d accelerometer driver + * + * Copyright (C) 2013 Andi Shyti + * + * 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 2 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, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef __ETZKX_H__ +#define __ETZKX_H__ + +#define ETZKX_G_RANGE_DONT_CARE 0 +#define ETZKX_G_RANGE_2G 2 +#define ETZKX_G_RANGE_4G 4 +#define ETZKX_G_RANGE_6G 6 +#define ETZKX_G_RANGE_8G 8 + +#define ETZKX_ODR_3_125 0x00 +#define ETZKX_ODR_6_25 0x01 +#define ETZKX_ODR_12_5 0x02 +#define ETZKX_ODR_25 0x03 +#define ETZKX_ODR_50 0x04 +#define ETZKX_ODR_100 0x05 +#define ETZKX_ODR_400 0x06 +#define ETZKX_ODR_1600 0x07 +#define ETZKX_ODR_DONT_CARE 0xFF + +#define ETZKX_STM_ID_NO_STM 0 +#define ETZKX_STM_ID_TIMING 1 +#define ETZKX_STM_ID_ORIENTATION 2 +#define ETZKX_STM_ID_DOUBLE_TAP 3 +#define ETZKX_STM_ID_WAKEUP 4 +#define ETZKX_STM_ID_V_DOUBLE_TAP 5 + +#define ETZKX_DEFAULT_G_RANGE ETZKX_G_RANGE_4G +#define ETZKX_DEFAULT_ODR ETZKX_ODR_50 + +/* ioctl-number: 'x' 00-2F (32 commands) */ +#define ETZKX_IOCTL_NUM ('x') + +struct etzkx_stm_data { + s32 id; + union { + /* double tap */ + struct { + u8 x; + u8 y; + u8 z; + u8 peak; + }; + /* orientation */ + struct { + u16 portrait; + u16 landscape; + }; + /* wake up */ + struct { + u16 wakeup; + u16 sleep; + }; + /* v double tap */ + struct { + u32 vtap; + }; + /* running algos */ + struct { + u16 stm1; + u16 stm2; + }; + } algo; +}; + +/* etzkx ioctl command types */ +#define ETZKXIO_ENABLE 0x01 +#define ETZKXIO_DISABLE 0x02 +#define ETZKXIO_STATE 0x03 +/* + * etzkx ioctl commands + * - first 6 bits identify the algorithm id + * - last 2 bits identify the operation type on the algorithm + */ +#define ETZKXIO_ENABLE_TIMING _IO(ETZKX_IOCTL_NUM, \ + (ETZKX_STM_ID_TIMING << 2) | \ + ETZKXIO_ENABLE) +#define ETZKXIO_DISABLE_TIMING _IO(ETZKX_IOCTL_NUM, \ + (ETZKX_STM_ID_TIMING << 2) | \ + ETZKXIO_DISABLE) +#define ETZKXIO_ENABLE_ORIENTATION _IO(ETZKX_IOCTL_NUM, \ + (ETZKX_STM_ID_ORIENTATION << 2) | \ + ETZKXIO_ENABLE) +#define ETZKXIO_DISABLE_ORIENTATION _IO(ETZKX_IOCTL_NUM, \ + (ETZKX_STM_ID_ORIENTATION << 2) | \ + ETZKXIO_DISABLE) +#define ETZKXIO_ENABLE_WAKEUP _IO(ETZKX_IOCTL_NUM, \ + (ETZKX_STM_ID_WAKEUP << 2) | \ + ETZKXIO_ENABLE) +#define ETZKXIO_DISABLE_WAKEUP _IO(ETZKX_IOCTL_NUM, \ + (ETZKX_STM_ID_WAKEUP << 2) | \ + ETZKXIO_DISABLE) +#define ETZKXIO_ENABLE_V_DOUBLE_TAP _IO(ETZKX_IOCTL_NUM, \ + (ETZKX_STM_ID_V_DOUBLE_TAP << 2) | \ + ETZKXIO_ENABLE) +#define ETZKXIO_DISABLE_V_DOUBLE_TAP _IO(ETZKX_IOCTL_NUM, \ + (ETZKX_STM_ID_V_DOUBLE_TAP << 2) | \ + ETZKXIO_DISABLE) +#define ETZKXIO_WHICH_ORIENTATION _IOR(ETZKX_IOCTL_NUM, \ + (ETZKX_STM_ID_ORIENTATION << 2) | \ + ETZKXIO_STATE, \ + struct etzkx_stm_data *) +#define ETZKXIO_ENABLE_DOUBLE_TAP _IO(ETZKX_IOCTL_NUM, \ + (ETZKX_STM_ID_DOUBLE_TAP << 2) | \ + ETZKXIO_ENABLE) +#define ETZKXIO_DISABLE_DOUBLE_TAP _IO(ETZKX_IOCTL_NUM, \ + (ETZKX_STM_ID_DOUBLE_TAP << 2) | \ + ETZKXIO_DISABLE) +#define ETZKXIO_RUNNING_ALGO _IOR(ETZKX_IOCTL_NUM, \ + (0x0A << 2) | ETZKXIO_STATE, \ + struct etzkx_stm_data *) +#define ETZKXIO_INSTANT_ORIENTATION _IOR(ETZKX_IOCTL_NUM, \ + (0x0B << 2) | ETZKXIO_STATE, \ + struct etzkx_stm_data *) + +#define ETZKX_DEV_NAME "etzkx" +#define ETZKX_DRV_VERSION 5 + +struct etzkx_platform_data { + int (*init)(void); + void (*release)(void); + + u8 x_map; + u8 y_map; + u8 z_map; + + u8 x_negate; + u8 y_negate; + u8 z_negate; + + u8 odr; + u8 range; + + u16 irq1; + u16 irq2; +}; + +#endif -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/