mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2025-04-21 12:27:27 +03:00
[s3c24xx] bump to 2.6.30-rc6
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@15918 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
lars
957
target/linux/s3c24xx/files-2.6.30/drivers/input/misc/lis302dl.c
Normal file
957
target/linux/s3c24xx/files-2.6.30/drivers/input/misc/lis302dl.c
Normal file
@@ -0,0 +1,957 @@
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/* Linux kernel driver for the ST LIS302D 3-axis accelerometer
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*
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* Copyright (C) 2007-2008 by Openmoko, Inc.
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* Author: Harald Welte <laforge@openmoko.org>
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* converted to private bitbang by:
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* Andy Green <andy@openmoko.com>
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* ability to set acceleration threshold added by:
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* Simon Kagstrom <simon.kagstrom@gmail.com>
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (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,
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* MA 02111-1307 USA
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*
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* TODO
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* * statistics for overflow events
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* * configuration interface (sysfs) for
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* * enable/disable x/y/z axis data ready
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* * enable/disable resume from freee fall / click
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* * free fall / click parameters
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* * high pass filter parameters
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*/
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/platform_device.h>
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#include <linux/delay.h>
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#include <linux/irq.h>
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#include <linux/interrupt.h>
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#include <linux/sysfs.h>
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#include <linux/spi/spi.h>
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#include <linux/lis302dl.h>
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/* Utility functions */
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static u8 __reg_read(struct lis302dl_info *lis, u8 reg)
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{
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struct spi_message msg;
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struct spi_transfer t;
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u8 data[2] = {0xc0 | reg};
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int rc;
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spi_message_init(&msg);
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memset(&t, 0, sizeof t);
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t.len = 2;
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spi_message_add_tail(&t, &msg);
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t.tx_buf = &data[0];
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t.rx_buf = &data[0];
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/* Should complete without blocking */
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rc = spi_non_blocking_transfer(lis->spi, &msg);
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if (rc < 0) {
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dev_err(lis->dev, "Error reading register\n");
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return rc;
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}
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return data[1];
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}
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static void __reg_write(struct lis302dl_info *lis, u8 reg, u8 val)
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{
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struct spi_message msg;
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struct spi_transfer t;
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u8 data[2] = {reg, val};
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spi_message_init(&msg);
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memset(&t, 0, sizeof t);
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t.len = 2;
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spi_message_add_tail(&t, &msg);
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t.tx_buf = &data[0];
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t.rx_buf = &data[0];
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/* Completes without blocking */
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if (spi_non_blocking_transfer(lis->spi, &msg) < 0)
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dev_err(lis->dev, "Error writing register\n");
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}
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static void __reg_set_bit_mask(struct lis302dl_info *lis, u8 reg, u8 mask,
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u8 val)
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{
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u_int8_t tmp;
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val &= mask;
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tmp = __reg_read(lis, reg);
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tmp &= ~mask;
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tmp |= val;
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__reg_write(lis, reg, tmp);
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}
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static int __ms_to_duration(struct lis302dl_info *lis, int ms)
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{
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/* If we have 400 ms sampling rate, the stepping is 2.5 ms,
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* on 100 ms the stepping is 10ms */
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if (lis->flags & LIS302DL_F_DR)
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return min((ms * 10) / 25, 637);
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return min(ms / 10, 2550);
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}
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static int __duration_to_ms(struct lis302dl_info *lis, int duration)
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{
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if (lis->flags & LIS302DL_F_DR)
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return (duration * 25) / 10;
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return duration * 10;
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}
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static u8 __mg_to_threshold(struct lis302dl_info *lis, int mg)
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{
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/* If FS is set each bit is 71mg, otherwise 18mg. The THS register
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* has 7 bits for the threshold value */
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if (lis->flags & LIS302DL_F_FS)
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return min(mg / 71, 127);
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return min(mg / 18, 127);
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}
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static int __threshold_to_mg(struct lis302dl_info *lis, u8 threshold)
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{
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if (lis->flags & LIS302DL_F_FS)
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return threshold * 71;
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return threshold * 18;
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}
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/* interrupt handling related */
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enum lis302dl_intmode {
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LIS302DL_INTMODE_GND = 0x00,
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LIS302DL_INTMODE_FF_WU_1 = 0x01,
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LIS302DL_INTMODE_FF_WU_2 = 0x02,
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LIS302DL_INTMODE_FF_WU_12 = 0x03,
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LIS302DL_INTMODE_DATA_READY = 0x04,
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LIS302DL_INTMODE_CLICK = 0x07,
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};
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static void __lis302dl_int_mode(struct device *dev, int int_pin,
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enum lis302dl_intmode mode)
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{
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struct lis302dl_info *lis = dev_get_drvdata(dev);
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switch (int_pin) {
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case 1:
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__reg_set_bit_mask(lis, LIS302DL_REG_CTRL3, 0x07, mode);
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break;
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case 2:
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__reg_set_bit_mask(lis, LIS302DL_REG_CTRL3, 0x38, mode << 3);
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break;
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default:
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BUG();
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}
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}
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static void __enable_wakeup(struct lis302dl_info *lis)
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{
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__reg_write(lis, LIS302DL_REG_CTRL1, 0);
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/* First zero to get to a known state */
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__reg_write(lis, LIS302DL_REG_FF_WU_CFG_1, LIS302DL_FFWUCFG_XHIE |
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LIS302DL_FFWUCFG_YHIE | LIS302DL_FFWUCFG_ZHIE |
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LIS302DL_FFWUCFG_LIR);
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__reg_write(lis, LIS302DL_REG_FF_WU_THS_1,
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__mg_to_threshold(lis, lis->wakeup.threshold));
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__reg_write(lis, LIS302DL_REG_FF_WU_DURATION_1,
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__ms_to_duration(lis, lis->wakeup.duration));
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/* Route the interrupt for wakeup */
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__lis302dl_int_mode(lis->dev, 1,
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LIS302DL_INTMODE_FF_WU_1);
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__reg_read(lis, LIS302DL_REG_HP_FILTER_RESET);
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__reg_read(lis, LIS302DL_REG_OUT_X);
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__reg_read(lis, LIS302DL_REG_OUT_Y);
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__reg_read(lis, LIS302DL_REG_OUT_Z);
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__reg_read(lis, LIS302DL_REG_STATUS);
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__reg_read(lis, LIS302DL_REG_FF_WU_SRC_1);
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__reg_read(lis, LIS302DL_REG_FF_WU_SRC_2);
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__reg_write(lis, LIS302DL_REG_CTRL1, LIS302DL_CTRL1_PD | 7);
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}
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static void __enable_data_collection(struct lis302dl_info *lis)
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{
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u_int8_t ctrl1 = LIS302DL_CTRL1_PD | LIS302DL_CTRL1_Xen |
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LIS302DL_CTRL1_Yen | LIS302DL_CTRL1_Zen;
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/* make sure we're powered up and generate data ready */
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__reg_set_bit_mask(lis, LIS302DL_REG_CTRL1, ctrl1, ctrl1);
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/* If the threshold is zero, let the device generated an interrupt
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* on each datum */
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if (lis->threshold == 0) {
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__reg_write(lis, LIS302DL_REG_CTRL2, 0);
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__lis302dl_int_mode(lis->dev, 1, LIS302DL_INTMODE_DATA_READY);
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__lis302dl_int_mode(lis->dev, 2, LIS302DL_INTMODE_DATA_READY);
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} else {
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__reg_write(lis, LIS302DL_REG_CTRL2,
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LIS302DL_CTRL2_HPFF1);
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__reg_write(lis, LIS302DL_REG_FF_WU_THS_1,
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__mg_to_threshold(lis, lis->threshold));
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__reg_write(lis, LIS302DL_REG_FF_WU_DURATION_1,
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__ms_to_duration(lis, lis->duration));
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/* Clear the HP filter "starting point" */
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__reg_read(lis, LIS302DL_REG_HP_FILTER_RESET);
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__reg_write(lis, LIS302DL_REG_FF_WU_CFG_1,
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LIS302DL_FFWUCFG_XHIE | LIS302DL_FFWUCFG_YHIE |
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LIS302DL_FFWUCFG_ZHIE | LIS302DL_FFWUCFG_LIR);
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__lis302dl_int_mode(lis->dev, 1, LIS302DL_INTMODE_FF_WU_12);
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__lis302dl_int_mode(lis->dev, 2, LIS302DL_INTMODE_FF_WU_12);
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}
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}
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#if 0
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static void _report_btn_single(struct input_dev *inp, int btn)
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{
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input_report_key(inp, btn, 1);
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input_sync(inp);
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input_report_key(inp, btn, 0);
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}
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static void _report_btn_double(struct input_dev *inp, int btn)
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{
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input_report_key(inp, btn, 1);
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input_sync(inp);
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input_report_key(inp, btn, 0);
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input_sync(inp);
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input_report_key(inp, btn, 1);
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input_sync(inp);
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input_report_key(inp, btn, 0);
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}
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#endif
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static void lis302dl_bitbang_read_sample(struct lis302dl_info *lis)
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{
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u8 data[(LIS302DL_REG_OUT_Z - LIS302DL_REG_STATUS) + 2] = {0xC0 | LIS302DL_REG_STATUS};
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u8 *read = data + 1;
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unsigned long flags;
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int mg_per_sample = __threshold_to_mg(lis, 1);
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struct spi_message msg;
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struct spi_transfer t;
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spi_message_init(&msg);
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memset(&t, 0, sizeof t);
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t.len = sizeof(data);
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spi_message_add_tail(&t, &msg);
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t.tx_buf = &data[0];
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t.rx_buf = &data[0];
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/* grab the set of register containing status and XYZ data */
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local_irq_save(flags);
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/* Should complete without blocking */
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if (spi_non_blocking_transfer(lis->spi, &msg) < 0)
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dev_err(lis->dev, "Error reading registers\n");
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local_irq_restore(flags);
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/*
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* at the minute the test below fails 50% of the time due to
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* a problem with level interrupts causing ISRs to get called twice.
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* This is a workaround for that, but actually this test is still
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* valid and the information can be used for overrrun stats.
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*/
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/* has any kind of overrun been observed by the lis302dl? */
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if (read[0] & (LIS302DL_STATUS_XOR |
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LIS302DL_STATUS_YOR |
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LIS302DL_STATUS_ZOR))
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lis->overruns++;
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/* we have a valid sample set? */
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if (read[0] & LIS302DL_STATUS_XYZDA) {
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input_report_abs(lis->input_dev, ABS_X, mg_per_sample *
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(s8)read[LIS302DL_REG_OUT_X - LIS302DL_REG_STATUS]);
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input_report_abs(lis->input_dev, ABS_Y, mg_per_sample *
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(s8)read[LIS302DL_REG_OUT_Y - LIS302DL_REG_STATUS]);
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input_report_abs(lis->input_dev, ABS_Z, mg_per_sample *
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(s8)read[LIS302DL_REG_OUT_Z - LIS302DL_REG_STATUS]);
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input_sync(lis->input_dev);
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}
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if (lis->threshold)
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/* acknowledge the wakeup source */
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__reg_read(lis, LIS302DL_REG_FF_WU_SRC_1);
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}
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static irqreturn_t lis302dl_interrupt(int irq, void *_lis)
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{
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struct lis302dl_info *lis = _lis;
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lis302dl_bitbang_read_sample(lis);
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return IRQ_HANDLED;
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}
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/* sysfs */
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static ssize_t show_overruns(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct lis302dl_info *lis = dev_get_drvdata(dev);
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return sprintf(buf, "%u\n", lis->overruns);
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}
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static DEVICE_ATTR(overruns, S_IRUGO, show_overruns, NULL);
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static ssize_t show_rate(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct lis302dl_info *lis = dev_get_drvdata(dev);
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u8 ctrl1;
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unsigned long flags;
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local_irq_save(flags);
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ctrl1 = __reg_read(lis, LIS302DL_REG_CTRL1);
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local_irq_restore(flags);
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return sprintf(buf, "%d\n", ctrl1 & LIS302DL_CTRL1_DR ? 400 : 100);
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}
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static ssize_t set_rate(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct lis302dl_info *lis = dev_get_drvdata(dev);
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unsigned long flags;
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local_irq_save(flags);
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if (!strcmp(buf, "400\n")) {
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__reg_set_bit_mask(lis, LIS302DL_REG_CTRL1, LIS302DL_CTRL1_DR,
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LIS302DL_CTRL1_DR);
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lis->flags |= LIS302DL_F_DR;
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} else {
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__reg_set_bit_mask(lis, LIS302DL_REG_CTRL1, LIS302DL_CTRL1_DR,
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0);
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lis->flags &= ~LIS302DL_F_DR;
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}
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local_irq_restore(flags);
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return count;
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}
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static DEVICE_ATTR(sample_rate, S_IRUGO | S_IWUSR, show_rate, set_rate);
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static ssize_t show_scale(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct lis302dl_info *lis = dev_get_drvdata(dev);
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u_int8_t ctrl1;
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unsigned long flags;
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local_irq_save(flags);
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ctrl1 = __reg_read(lis, LIS302DL_REG_CTRL1);
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local_irq_restore(flags);
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return sprintf(buf, "%s\n", ctrl1 & LIS302DL_CTRL1_FS ? "9.2" : "2.3");
|
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}
|
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static ssize_t set_scale(struct device *dev, struct device_attribute *attr,
|
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const char *buf, size_t count)
|
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{
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struct lis302dl_info *lis = dev_get_drvdata(dev);
|
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unsigned long flags;
|
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|
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local_irq_save(flags);
|
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if (!strcmp(buf, "9.2\n")) {
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__reg_set_bit_mask(lis, LIS302DL_REG_CTRL1, LIS302DL_CTRL1_FS,
|
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LIS302DL_CTRL1_FS);
|
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lis->flags |= LIS302DL_F_FS;
|
||||
} else {
|
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__reg_set_bit_mask(lis, LIS302DL_REG_CTRL1, LIS302DL_CTRL1_FS,
|
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0);
|
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lis->flags &= ~LIS302DL_F_FS;
|
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}
|
||||
|
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if (lis->flags & LIS302DL_F_INPUT_OPEN)
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__enable_data_collection(lis);
|
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|
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local_irq_restore(flags);
|
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|
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return count;
|
||||
}
|
||||
|
||||
static DEVICE_ATTR(full_scale, S_IRUGO | S_IWUSR, show_scale, set_scale);
|
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|
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static ssize_t show_threshold(struct device *dev, struct device_attribute *attr,
|
||||
char *buf)
|
||||
{
|
||||
struct lis302dl_info *lis = dev_get_drvdata(dev);
|
||||
|
||||
/* Display the device view of the threshold setting */
|
||||
return sprintf(buf, "%d\n", __threshold_to_mg(lis,
|
||||
__mg_to_threshold(lis, lis->threshold)));
|
||||
}
|
||||
|
||||
static ssize_t set_threshold(struct device *dev, struct device_attribute *attr,
|
||||
const char *buf, size_t count)
|
||||
{
|
||||
struct lis302dl_info *lis = dev_get_drvdata(dev);
|
||||
unsigned int val;
|
||||
|
||||
if (sscanf(buf, "%u\n", &val) != 1)
|
||||
return -EINVAL;
|
||||
/* 8g is the maximum if FS is 1 */
|
||||
if (val > 8000)
|
||||
return -ERANGE;
|
||||
|
||||
/* Set the threshold and write it out if the device is used */
|
||||
lis->threshold = val;
|
||||
|
||||
if (lis->flags & LIS302DL_F_INPUT_OPEN) {
|
||||
unsigned long flags;
|
||||
|
||||
local_irq_save(flags);
|
||||
__enable_data_collection(lis);
|
||||
local_irq_restore(flags);
|
||||
}
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
static DEVICE_ATTR(threshold, S_IRUGO | S_IWUSR, show_threshold, set_threshold);
|
||||
|
||||
static ssize_t show_duration(struct device *dev, struct device_attribute *attr,
|
||||
char *buf)
|
||||
{
|
||||
struct lis302dl_info *lis = dev_get_drvdata(dev);
|
||||
|
||||
return sprintf(buf, "%d\n", __duration_to_ms(lis,
|
||||
__ms_to_duration(lis, lis->duration)));
|
||||
}
|
||||
|
||||
static ssize_t set_duration(struct device *dev, struct device_attribute *attr,
|
||||
const char *buf, size_t count)
|
||||
{
|
||||
struct lis302dl_info *lis = dev_get_drvdata(dev);
|
||||
unsigned int val;
|
||||
|
||||
if (sscanf(buf, "%u\n", &val) != 1)
|
||||
return -EINVAL;
|
||||
if (val > 2550)
|
||||
return -ERANGE;
|
||||
|
||||
lis->duration = val;
|
||||
if (lis->flags & LIS302DL_F_INPUT_OPEN)
|
||||
__reg_write(lis, LIS302DL_REG_FF_WU_DURATION_1,
|
||||
__ms_to_duration(lis, lis->duration));
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
static DEVICE_ATTR(duration, S_IRUGO | S_IWUSR, show_duration, set_duration);
|
||||
|
||||
static ssize_t lis302dl_dump(struct device *dev, struct device_attribute *attr,
|
||||
char *buf)
|
||||
{
|
||||
struct lis302dl_info *lis = dev_get_drvdata(dev);
|
||||
int n = 0;
|
||||
u8 reg[0x40];
|
||||
char *end = buf;
|
||||
unsigned long flags;
|
||||
|
||||
local_irq_save(flags);
|
||||
|
||||
for (n = 0; n < sizeof(reg); n++)
|
||||
reg[n] = __reg_read(lis, n);
|
||||
|
||||
local_irq_restore(flags);
|
||||
|
||||
for (n = 0; n < sizeof(reg); n += 16) {
|
||||
hex_dump_to_buffer(reg + n, 16, 16, 1, end, 128, 0);
|
||||
end += strlen(end);
|
||||
*end++ = '\n';
|
||||
*end++ = '\0';
|
||||
}
|
||||
|
||||
return end - buf;
|
||||
}
|
||||
static DEVICE_ATTR(dump, S_IRUGO, lis302dl_dump, NULL);
|
||||
|
||||
/* Configure freefall/wakeup interrupts */
|
||||
static ssize_t set_wakeup_threshold(struct device *dev,
|
||||
struct device_attribute *attr, const char *buf, size_t count)
|
||||
{
|
||||
struct lis302dl_info *lis = dev_get_drvdata(dev);
|
||||
unsigned int threshold;
|
||||
|
||||
if (sscanf(buf, "%u\n", &threshold) != 1)
|
||||
return -EINVAL;
|
||||
|
||||
if (threshold > 8000)
|
||||
return -ERANGE;
|
||||
|
||||
/* Zero turns the feature off */
|
||||
if (threshold == 0) {
|
||||
if (lis->flags & LIS302DL_F_IRQ_WAKE) {
|
||||
disable_irq_wake(lis->pdata->interrupt);
|
||||
lis->flags &= ~LIS302DL_F_IRQ_WAKE;
|
||||
}
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
lis->wakeup.threshold = threshold;
|
||||
|
||||
if (!(lis->flags & LIS302DL_F_IRQ_WAKE)) {
|
||||
enable_irq_wake(lis->pdata->interrupt);
|
||||
lis->flags |= LIS302DL_F_IRQ_WAKE;
|
||||
}
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
static ssize_t show_wakeup_threshold(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct lis302dl_info *lis = dev_get_drvdata(dev);
|
||||
|
||||
/* All events off? */
|
||||
if (lis->wakeup.threshold == 0)
|
||||
return sprintf(buf, "off\n");
|
||||
|
||||
return sprintf(buf, "%u\n", lis->wakeup.threshold);
|
||||
}
|
||||
|
||||
static DEVICE_ATTR(wakeup_threshold, S_IRUGO | S_IWUSR, show_wakeup_threshold,
|
||||
set_wakeup_threshold);
|
||||
|
||||
static ssize_t set_wakeup_duration(struct device *dev,
|
||||
struct device_attribute *attr, const char *buf, size_t count)
|
||||
{
|
||||
struct lis302dl_info *lis = dev_get_drvdata(dev);
|
||||
unsigned int duration;
|
||||
|
||||
if (sscanf(buf, "%u\n", &duration) != 1)
|
||||
return -EINVAL;
|
||||
|
||||
if (duration > 2550)
|
||||
return -ERANGE;
|
||||
|
||||
lis->wakeup.duration = duration;
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
static ssize_t show_wakeup_duration(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct lis302dl_info *lis = dev_get_drvdata(dev);
|
||||
|
||||
return sprintf(buf, "%u\n", lis->wakeup.duration);
|
||||
}
|
||||
|
||||
static DEVICE_ATTR(wakeup_duration, S_IRUGO | S_IWUSR, show_wakeup_duration,
|
||||
set_wakeup_duration);
|
||||
|
||||
static struct attribute *lis302dl_sysfs_entries[] = {
|
||||
&dev_attr_sample_rate.attr,
|
||||
&dev_attr_full_scale.attr,
|
||||
&dev_attr_threshold.attr,
|
||||
&dev_attr_duration.attr,
|
||||
&dev_attr_dump.attr,
|
||||
&dev_attr_wakeup_threshold.attr,
|
||||
&dev_attr_wakeup_duration.attr,
|
||||
&dev_attr_overruns.attr,
|
||||
NULL
|
||||
};
|
||||
|
||||
static struct attribute_group lis302dl_attr_group = {
|
||||
.name = NULL,
|
||||
.attrs = lis302dl_sysfs_entries,
|
||||
};
|
||||
|
||||
/* input device handling and driver core interaction */
|
||||
|
||||
static int lis302dl_input_open(struct input_dev *inp)
|
||||
{
|
||||
struct lis302dl_info *lis = input_get_drvdata(inp);
|
||||
unsigned long flags;
|
||||
|
||||
local_irq_save(flags);
|
||||
|
||||
__enable_data_collection(lis);
|
||||
lis->flags |= LIS302DL_F_INPUT_OPEN;
|
||||
|
||||
local_irq_restore(flags);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void lis302dl_input_close(struct input_dev *inp)
|
||||
{
|
||||
struct lis302dl_info *lis = input_get_drvdata(inp);
|
||||
u_int8_t ctrl1 = LIS302DL_CTRL1_Xen | LIS302DL_CTRL1_Yen |
|
||||
LIS302DL_CTRL1_Zen;
|
||||
unsigned long flags;
|
||||
|
||||
local_irq_save(flags);
|
||||
|
||||
/* since the input core already serializes access and makes sure we
|
||||
* only see close() for the close of the last user, we can safely
|
||||
* disable the data ready events */
|
||||
__reg_set_bit_mask(lis, LIS302DL_REG_CTRL1, ctrl1, 0x00);
|
||||
lis->flags &= ~LIS302DL_F_INPUT_OPEN;
|
||||
|
||||
/* however, don't power down the whole device if still needed */
|
||||
if (!(lis->flags & LIS302DL_F_WUP_FF ||
|
||||
lis->flags & LIS302DL_F_WUP_CLICK)) {
|
||||
__reg_set_bit_mask(lis, LIS302DL_REG_CTRL1, LIS302DL_CTRL1_PD,
|
||||
0x00);
|
||||
}
|
||||
local_irq_restore(flags);
|
||||
}
|
||||
|
||||
/* get the device to reload its coefficients from EEPROM and wait for it
|
||||
* to complete
|
||||
*/
|
||||
|
||||
static int __lis302dl_reset_device(struct lis302dl_info *lis)
|
||||
{
|
||||
int timeout = 10;
|
||||
|
||||
__reg_write(lis, LIS302DL_REG_CTRL2,
|
||||
LIS302DL_CTRL2_BOOT | LIS302DL_CTRL2_FDS);
|
||||
|
||||
while ((__reg_read(lis, LIS302DL_REG_CTRL2)
|
||||
& LIS302DL_CTRL2_BOOT) && (timeout--))
|
||||
mdelay(1);
|
||||
|
||||
return !!(timeout < 0);
|
||||
}
|
||||
|
||||
static int __devinit lis302dl_probe(struct spi_device *spi)
|
||||
{
|
||||
int rc;
|
||||
struct lis302dl_info *lis;
|
||||
u_int8_t wai;
|
||||
unsigned long flags;
|
||||
struct lis302dl_platform_data *pdata = spi->dev.platform_data;
|
||||
|
||||
spi->mode = SPI_MODE_3;
|
||||
rc = spi_setup(spi);
|
||||
if (rc < 0) {
|
||||
dev_err(&spi->dev, "spi_setup failed\n");
|
||||
return rc;
|
||||
}
|
||||
|
||||
lis = kzalloc(sizeof(*lis), GFP_KERNEL);
|
||||
if (!lis)
|
||||
return -ENOMEM;
|
||||
|
||||
lis->dev = &spi->dev;
|
||||
lis->spi = spi;
|
||||
|
||||
dev_set_drvdata(lis->dev, lis);
|
||||
|
||||
lis->pdata = pdata;
|
||||
|
||||
rc = sysfs_create_group(&lis->dev->kobj, &lis302dl_attr_group);
|
||||
if (rc) {
|
||||
dev_err(lis->dev, "error creating sysfs group\n");
|
||||
goto bail_free_lis;
|
||||
}
|
||||
|
||||
/* initialize input layer details */
|
||||
lis->input_dev = input_allocate_device();
|
||||
if (!lis->input_dev) {
|
||||
dev_err(lis->dev, "Unable to allocate input device\n");
|
||||
goto bail_sysfs;
|
||||
}
|
||||
|
||||
input_set_drvdata(lis->input_dev, lis);
|
||||
lis->input_dev->name = pdata->name;
|
||||
/* SPI Bus not defined as a valid bus for input subsystem*/
|
||||
lis->input_dev->id.bustype = BUS_I2C; /* lie about it */
|
||||
lis->input_dev->open = lis302dl_input_open;
|
||||
lis->input_dev->close = lis302dl_input_close;
|
||||
|
||||
rc = input_register_device(lis->input_dev);
|
||||
if (rc) {
|
||||
dev_err(lis->dev, "error %d registering input device\n", rc);
|
||||
goto bail_inp_dev;
|
||||
}
|
||||
|
||||
local_irq_save(flags);
|
||||
/* Configure our IO */
|
||||
(lis->pdata->lis302dl_suspend_io)(lis, 1);
|
||||
|
||||
wai = __reg_read(lis, LIS302DL_REG_WHO_AM_I);
|
||||
if (wai != LIS302DL_WHO_AM_I_MAGIC) {
|
||||
dev_err(lis->dev, "unknown who_am_i signature 0x%02x\n", wai);
|
||||
dev_set_drvdata(lis->dev, NULL);
|
||||
rc = -ENODEV;
|
||||
local_irq_restore(flags);
|
||||
goto bail_inp_reg;
|
||||
}
|
||||
|
||||
set_bit(EV_ABS, lis->input_dev->evbit);
|
||||
input_set_abs_params(lis->input_dev, ABS_X, 0, 0, 0, 0);
|
||||
input_set_abs_params(lis->input_dev, ABS_Y, 0, 0, 0, 0);
|
||||
input_set_abs_params(lis->input_dev, ABS_Z, 0, 0, 0, 0);
|
||||
|
||||
lis->threshold = 0;
|
||||
lis->duration = 0;
|
||||
memset(&lis->wakeup, 0, sizeof(lis->wakeup));
|
||||
|
||||
if (__lis302dl_reset_device(lis))
|
||||
dev_err(lis->dev, "device BOOT reload failed\n");
|
||||
|
||||
/* force us powered */
|
||||
__reg_write(lis, LIS302DL_REG_CTRL1, LIS302DL_CTRL1_PD |
|
||||
LIS302DL_CTRL1_Xen |
|
||||
LIS302DL_CTRL1_Yen |
|
||||
LIS302DL_CTRL1_Zen);
|
||||
mdelay(1);
|
||||
|
||||
__reg_write(lis, LIS302DL_REG_CTRL2, 0);
|
||||
__reg_write(lis, LIS302DL_REG_CTRL3,
|
||||
LIS302DL_CTRL3_PP_OD | LIS302DL_CTRL3_IHL);
|
||||
__reg_write(lis, LIS302DL_REG_FF_WU_THS_1, 0x0);
|
||||
__reg_write(lis, LIS302DL_REG_FF_WU_DURATION_1, 0x00);
|
||||
__reg_write(lis, LIS302DL_REG_FF_WU_CFG_1, 0x0);
|
||||
|
||||
/* start off in powered down mode; we power up when someone opens us */
|
||||
__reg_write(lis, LIS302DL_REG_CTRL1, LIS302DL_CTRL1_Xen |
|
||||
LIS302DL_CTRL1_Yen | LIS302DL_CTRL1_Zen);
|
||||
|
||||
if (pdata->open_drain)
|
||||
/* switch interrupt to open collector, active-low */
|
||||
__reg_write(lis, LIS302DL_REG_CTRL3,
|
||||
LIS302DL_CTRL3_PP_OD | LIS302DL_CTRL3_IHL);
|
||||
else
|
||||
/* push-pull, active-low */
|
||||
__reg_write(lis, LIS302DL_REG_CTRL3, LIS302DL_CTRL3_IHL);
|
||||
|
||||
__lis302dl_int_mode(lis->dev, 1, LIS302DL_INTMODE_GND);
|
||||
__lis302dl_int_mode(lis->dev, 2, LIS302DL_INTMODE_GND);
|
||||
|
||||
__reg_read(lis, LIS302DL_REG_STATUS);
|
||||
__reg_read(lis, LIS302DL_REG_FF_WU_SRC_1);
|
||||
__reg_read(lis, LIS302DL_REG_FF_WU_SRC_2);
|
||||
__reg_read(lis, LIS302DL_REG_CLICK_SRC);
|
||||
local_irq_restore(flags);
|
||||
|
||||
dev_info(lis->dev, "Found %s\n", pdata->name);
|
||||
|
||||
lis->pdata = pdata;
|
||||
|
||||
set_irq_handler(lis->pdata->interrupt, handle_level_irq);
|
||||
|
||||
rc = request_irq(lis->pdata->interrupt, lis302dl_interrupt,
|
||||
IRQF_TRIGGER_LOW, "lis302dl", lis);
|
||||
|
||||
if (rc < 0) {
|
||||
dev_err(lis->dev, "error requesting IRQ %d\n",
|
||||
lis->pdata->interrupt);
|
||||
goto bail_inp_reg;
|
||||
}
|
||||
return 0;
|
||||
|
||||
bail_inp_reg:
|
||||
input_unregister_device(lis->input_dev);
|
||||
bail_inp_dev:
|
||||
input_free_device(lis->input_dev);
|
||||
bail_sysfs:
|
||||
sysfs_remove_group(&lis->dev->kobj, &lis302dl_attr_group);
|
||||
bail_free_lis:
|
||||
kfree(lis);
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int __devexit lis302dl_remove(struct spi_device *spi)
|
||||
{
|
||||
struct lis302dl_info *lis = dev_get_drvdata(&spi->dev);
|
||||
unsigned long flags;
|
||||
|
||||
/* Disable interrupts */
|
||||
if (lis->flags & LIS302DL_F_IRQ_WAKE)
|
||||
disable_irq_wake(lis->pdata->interrupt);
|
||||
free_irq(lis->pdata->interrupt, lis);
|
||||
|
||||
/* Reset and power down the device */
|
||||
local_irq_save(flags);
|
||||
__reg_write(lis, LIS302DL_REG_CTRL3, 0x00);
|
||||
__reg_write(lis, LIS302DL_REG_CTRL2, 0x00);
|
||||
__reg_write(lis, LIS302DL_REG_CTRL1, 0x00);
|
||||
local_irq_restore(flags);
|
||||
|
||||
/* Cleanup resources */
|
||||
sysfs_remove_group(&spi->dev.kobj, &lis302dl_attr_group);
|
||||
input_unregister_device(lis->input_dev);
|
||||
if (lis->input_dev)
|
||||
input_free_device(lis->input_dev);
|
||||
dev_set_drvdata(lis->dev, NULL);
|
||||
kfree(lis);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM
|
||||
|
||||
static u8 regs_to_save[] = {
|
||||
LIS302DL_REG_CTRL1,
|
||||
LIS302DL_REG_CTRL2,
|
||||
LIS302DL_REG_CTRL3,
|
||||
LIS302DL_REG_FF_WU_CFG_1,
|
||||
LIS302DL_REG_FF_WU_THS_1,
|
||||
LIS302DL_REG_FF_WU_DURATION_1,
|
||||
LIS302DL_REG_FF_WU_CFG_2,
|
||||
LIS302DL_REG_FF_WU_THS_2,
|
||||
LIS302DL_REG_FF_WU_DURATION_2,
|
||||
LIS302DL_REG_CLICK_CFG,
|
||||
LIS302DL_REG_CLICK_THSY_X,
|
||||
LIS302DL_REG_CLICK_THSZ,
|
||||
LIS302DL_REG_CLICK_TIME_LIMIT,
|
||||
LIS302DL_REG_CLICK_LATENCY,
|
||||
LIS302DL_REG_CLICK_WINDOW,
|
||||
|
||||
};
|
||||
|
||||
static int lis302dl_suspend(struct spi_device *spi, pm_message_t state)
|
||||
{
|
||||
struct lis302dl_info *lis = dev_get_drvdata(&spi->dev);
|
||||
unsigned long flags;
|
||||
u_int8_t tmp;
|
||||
int n;
|
||||
|
||||
/* determine if we want to wake up from the accel. */
|
||||
if (lis->flags & LIS302DL_F_WUP_CLICK)
|
||||
return 0;
|
||||
|
||||
disable_irq(lis->pdata->interrupt);
|
||||
local_irq_save(flags);
|
||||
|
||||
/*
|
||||
* When we share SPI over multiple sensors, there is a race here
|
||||
* that one or more sensors will lose. In that case, the shared
|
||||
* SPI bus GPIO will be in sleep mode and partially pulled down. So
|
||||
* we explicitly put our IO into "wake" mode here before the final
|
||||
* traffic to the sensor.
|
||||
*/
|
||||
(lis->pdata->lis302dl_suspend_io)(lis, 1);
|
||||
|
||||
/* save registers */
|
||||
for (n = 0; n < ARRAY_SIZE(regs_to_save); n++)
|
||||
lis->regs[regs_to_save[n]] =
|
||||
__reg_read(lis, regs_to_save[n]);
|
||||
|
||||
/* power down or enable wakeup */
|
||||
|
||||
if (lis->wakeup.threshold == 0) {
|
||||
tmp = __reg_read(lis, LIS302DL_REG_CTRL1);
|
||||
tmp &= ~LIS302DL_CTRL1_PD;
|
||||
__reg_write(lis, LIS302DL_REG_CTRL1, tmp);
|
||||
} else
|
||||
__enable_wakeup(lis);
|
||||
|
||||
/* place our IO to the device in sleep-compatible states */
|
||||
(lis->pdata->lis302dl_suspend_io)(lis, 0);
|
||||
|
||||
local_irq_restore(flags);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int lis302dl_resume(struct spi_device *spi)
|
||||
{
|
||||
struct lis302dl_info *lis = dev_get_drvdata(&spi->dev);
|
||||
unsigned long flags;
|
||||
int n;
|
||||
|
||||
if (lis->flags & LIS302DL_F_WUP_CLICK)
|
||||
return 0;
|
||||
|
||||
local_irq_save(flags);
|
||||
|
||||
/* get our IO to the device back in operational states */
|
||||
(lis->pdata->lis302dl_suspend_io)(lis, 1);
|
||||
|
||||
/* resume from powerdown first! */
|
||||
__reg_write(lis, LIS302DL_REG_CTRL1,
|
||||
LIS302DL_CTRL1_PD |
|
||||
LIS302DL_CTRL1_Xen |
|
||||
LIS302DL_CTRL1_Yen |
|
||||
LIS302DL_CTRL1_Zen);
|
||||
mdelay(1);
|
||||
|
||||
if (__lis302dl_reset_device(lis))
|
||||
dev_err(&spi->dev, "device BOOT reload failed\n");
|
||||
|
||||
lis->regs[LIS302DL_REG_CTRL1] |= LIS302DL_CTRL1_PD |
|
||||
LIS302DL_CTRL1_Xen |
|
||||
LIS302DL_CTRL1_Yen |
|
||||
LIS302DL_CTRL1_Zen;
|
||||
|
||||
/* restore registers after resume */
|
||||
for (n = 0; n < ARRAY_SIZE(regs_to_save); n++)
|
||||
__reg_write(lis, regs_to_save[n], lis->regs[regs_to_save[n]]);
|
||||
|
||||
/* if someone had us open, reset the non-wake threshold stuff */
|
||||
if (lis->flags & LIS302DL_F_INPUT_OPEN)
|
||||
__enable_data_collection(lis);
|
||||
|
||||
local_irq_restore(flags);
|
||||
enable_irq(lis->pdata->interrupt);
|
||||
|
||||
return 0;
|
||||
}
|
||||
#else
|
||||
#define lis302dl_suspend NULL
|
||||
#define lis302dl_resume NULL
|
||||
#endif
|
||||
|
||||
static struct spi_driver lis302dl_spi_driver = {
|
||||
.driver = {
|
||||
.name = "lis302dl",
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
|
||||
.probe = lis302dl_probe,
|
||||
.remove = __devexit_p(lis302dl_remove),
|
||||
.suspend = lis302dl_suspend,
|
||||
.resume = lis302dl_resume,
|
||||
};
|
||||
|
||||
static int __devinit lis302dl_init(void)
|
||||
{
|
||||
return spi_register_driver(&lis302dl_spi_driver);
|
||||
}
|
||||
|
||||
static void __exit lis302dl_exit(void)
|
||||
{
|
||||
spi_unregister_driver(&lis302dl_spi_driver);
|
||||
}
|
||||
|
||||
MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
||||
module_init(lis302dl_init);
|
||||
module_exit(lis302dl_exit);
|
||||
Reference in New Issue
Block a user