forked from Minki/linux
8f3128e714
The LIS302DL accelerometer chip has a 'click' feature which can be used to detect sudden motion on any of the three axis. Configuration data is passed via spi platform_data and no action is taken if that's not specified, so it won't harm any existing platform. To make the configuration effective, the IRQ lines need to be set up appropriately. This patch also adds a way to do that from board support code. The DD_* definitions were factored out to an own enum because they are specific to LIS3LV02D devices. Signed-off-by: Daniel Mack <daniel@caiaq.de> Acked-by: Pavel Machek <pavel@ucw.cz> Acked-by: Eric Piel <eric.piel@tremplin-utc.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
213 lines
5.1 KiB
C
213 lines
5.1 KiB
C
/*
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* lis3lv02d.h - ST LIS3LV02DL accelerometer driver
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*
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* Copyright (C) 2007-2008 Yan Burman
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* Copyright (C) 2008 Eric Piel
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/platform_device.h>
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#include <linux/input-polldev.h>
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/*
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* The actual chip is STMicroelectronics LIS3LV02DL or LIS3LV02DQ that seems to
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* be connected via SPI. There exists also several similar chips (such as LIS302DL or
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* LIS3L02DQ) and they have slightly different registers, but we can provide a
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* common interface for all of them.
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* They can also be connected via I²C.
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*/
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#include <linux/lis3lv02d.h>
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/* 2-byte registers */
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#define LIS_DOUBLE_ID 0x3A /* LIS3LV02D[LQ] */
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/* 1-byte registers */
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#define LIS_SINGLE_ID 0x3B /* LIS[32]02DL and others */
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enum lis3_reg {
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WHO_AM_I = 0x0F,
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OFFSET_X = 0x16,
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OFFSET_Y = 0x17,
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OFFSET_Z = 0x18,
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GAIN_X = 0x19,
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GAIN_Y = 0x1A,
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GAIN_Z = 0x1B,
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CTRL_REG1 = 0x20,
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CTRL_REG2 = 0x21,
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CTRL_REG3 = 0x22,
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HP_FILTER_RESET = 0x23,
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STATUS_REG = 0x27,
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OUTX_L = 0x28,
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OUTX_H = 0x29,
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OUTX = 0x29,
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OUTY_L = 0x2A,
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OUTY_H = 0x2B,
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OUTY = 0x2B,
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OUTZ_L = 0x2C,
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OUTZ_H = 0x2D,
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OUTZ = 0x2D,
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FF_WU_CFG = 0x30,
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FF_WU_SRC = 0x31,
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FF_WU_ACK = 0x32,
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FF_WU_THS_L = 0x34,
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FF_WU_THS_H = 0x35,
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FF_WU_DURATION = 0x36,
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};
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enum lis302d_reg {
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CLICK_CFG = 0x38,
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CLICK_SRC = 0x39,
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CLICK_THSY_X = 0x3B,
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CLICK_THSZ = 0x3C,
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CLICK_TIMELIMIT = 0x3D,
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CLICK_LATENCY = 0x3E,
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CLICK_WINDOW = 0x3F,
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};
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enum lis3lv02d_reg {
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DD_CFG = 0x38,
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DD_SRC = 0x39,
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DD_ACK = 0x3A,
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DD_THSI_L = 0x3C,
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DD_THSI_H = 0x3D,
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DD_THSE_L = 0x3E,
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DD_THSE_H = 0x3F,
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};
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enum lis3lv02d_ctrl1 {
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CTRL1_Xen = 0x01,
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CTRL1_Yen = 0x02,
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CTRL1_Zen = 0x04,
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CTRL1_ST = 0x08,
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CTRL1_DF0 = 0x10,
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CTRL1_DF1 = 0x20,
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CTRL1_PD0 = 0x40,
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CTRL1_PD1 = 0x80,
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};
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enum lis3lv02d_ctrl2 {
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CTRL2_DAS = 0x01,
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CTRL2_SIM = 0x02,
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CTRL2_DRDY = 0x04,
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CTRL2_IEN = 0x08,
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CTRL2_BOOT = 0x10,
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CTRL2_BLE = 0x20,
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CTRL2_BDU = 0x40, /* Block Data Update */
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CTRL2_FS = 0x80, /* Full Scale selection */
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};
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enum lis3lv02d_ctrl3 {
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CTRL3_CFS0 = 0x01,
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CTRL3_CFS1 = 0x02,
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CTRL3_FDS = 0x10,
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CTRL3_HPFF = 0x20,
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CTRL3_HPDD = 0x40,
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CTRL3_ECK = 0x80,
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};
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enum lis3lv02d_status_reg {
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STATUS_XDA = 0x01,
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STATUS_YDA = 0x02,
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STATUS_ZDA = 0x04,
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STATUS_XYZDA = 0x08,
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STATUS_XOR = 0x10,
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STATUS_YOR = 0x20,
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STATUS_ZOR = 0x40,
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STATUS_XYZOR = 0x80,
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};
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enum lis3lv02d_ff_wu_cfg {
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FF_WU_CFG_XLIE = 0x01,
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FF_WU_CFG_XHIE = 0x02,
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FF_WU_CFG_YLIE = 0x04,
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FF_WU_CFG_YHIE = 0x08,
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FF_WU_CFG_ZLIE = 0x10,
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FF_WU_CFG_ZHIE = 0x20,
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FF_WU_CFG_LIR = 0x40,
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FF_WU_CFG_AOI = 0x80,
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};
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enum lis3lv02d_ff_wu_src {
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FF_WU_SRC_XL = 0x01,
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FF_WU_SRC_XH = 0x02,
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FF_WU_SRC_YL = 0x04,
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FF_WU_SRC_YH = 0x08,
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FF_WU_SRC_ZL = 0x10,
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FF_WU_SRC_ZH = 0x20,
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FF_WU_SRC_IA = 0x40,
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};
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enum lis3lv02d_dd_cfg {
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DD_CFG_XLIE = 0x01,
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DD_CFG_XHIE = 0x02,
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DD_CFG_YLIE = 0x04,
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DD_CFG_YHIE = 0x08,
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DD_CFG_ZLIE = 0x10,
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DD_CFG_ZHIE = 0x20,
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DD_CFG_LIR = 0x40,
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DD_CFG_IEND = 0x80,
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};
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enum lis3lv02d_dd_src {
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DD_SRC_XL = 0x01,
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DD_SRC_XH = 0x02,
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DD_SRC_YL = 0x04,
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DD_SRC_YH = 0x08,
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DD_SRC_ZL = 0x10,
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DD_SRC_ZH = 0x20,
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DD_SRC_IA = 0x40,
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};
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struct axis_conversion {
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s8 x;
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s8 y;
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s8 z;
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};
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struct lis3lv02d {
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void *bus_priv; /* used by the bus layer only */
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int (*init) (struct lis3lv02d *lis3);
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int (*write) (struct lis3lv02d *lis3, int reg, u8 val);
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int (*read) (struct lis3lv02d *lis3, int reg, u8 *ret);
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u8 whoami; /* 3Ah: 2-byte registries, 3Bh: 1-byte registries */
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s16 (*read_data) (struct lis3lv02d *lis3, int reg);
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int mdps_max_val;
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struct input_polled_dev *idev; /* input device */
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struct platform_device *pdev; /* platform device */
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atomic_t count; /* interrupt count after last read */
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int xcalib; /* calibrated null value for x */
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int ycalib; /* calibrated null value for y */
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int zcalib; /* calibrated null value for z */
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struct axis_conversion ac; /* hw -> logical axis */
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u32 irq; /* IRQ number */
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struct fasync_struct *async_queue; /* queue for the misc device */
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wait_queue_head_t misc_wait; /* Wait queue for the misc device */
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unsigned long misc_opened; /* bit0: whether the device is open */
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struct lis3lv02d_platform_data *pdata; /* for passing board config */
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};
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int lis3lv02d_init_device(struct lis3lv02d *lis3);
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int lis3lv02d_joystick_enable(void);
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void lis3lv02d_joystick_disable(void);
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void lis3lv02d_poweroff(struct lis3lv02d *lis3);
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void lis3lv02d_poweron(struct lis3lv02d *lis3);
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int lis3lv02d_remove_fs(struct lis3lv02d *lis3);
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extern struct lis3lv02d lis3_dev;
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