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Diffstat (limited to 'drivers/hwmon/ams/ams-i2c.c')
-rw-r--r--drivers/hwmon/ams/ams-i2c.c277
1 files changed, 0 insertions, 277 deletions
diff --git a/drivers/hwmon/ams/ams-i2c.c b/drivers/hwmon/ams/ams-i2c.c
deleted file mode 100644
index abeecd27b484..000000000000
--- a/drivers/hwmon/ams/ams-i2c.c
+++ /dev/null
@@ -1,277 +0,0 @@
-/*
- * Apple Motion Sensor driver (I2C variant)
- *
- * Copyright (C) 2005 Stelian Pop (stelian@popies.net)
- * Copyright (C) 2006 Michael Hanselmann (linux-kernel@hansmi.ch)
- *
- * Clean room implementation based on the reverse engineered Mac OS X driver by
- * Johannes Berg <johannes@sipsolutions.net>, documentation available at
- * http://johannes.sipsolutions.net/PowerBook/Apple_Motion_Sensor_Specification
- *
- * 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.
- */
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-
-#include "ams.h"
-
-/* AMS registers */
-#define AMS_COMMAND 0x00 /* command register */
-#define AMS_STATUS 0x01 /* status register */
-#define AMS_CTRL1 0x02 /* read control 1 (number of values) */
-#define AMS_CTRL2 0x03 /* read control 2 (offset?) */
-#define AMS_CTRL3 0x04 /* read control 3 (size of each value?) */
-#define AMS_DATA1 0x05 /* read data 1 */
-#define AMS_DATA2 0x06 /* read data 2 */
-#define AMS_DATA3 0x07 /* read data 3 */
-#define AMS_DATA4 0x08 /* read data 4 */
-#define AMS_DATAX 0x20 /* data X */
-#define AMS_DATAY 0x21 /* data Y */
-#define AMS_DATAZ 0x22 /* data Z */
-#define AMS_FREEFALL 0x24 /* freefall int control */
-#define AMS_SHOCK 0x25 /* shock int control */
-#define AMS_SENSLOW 0x26 /* sensitivity low limit */
-#define AMS_SENSHIGH 0x27 /* sensitivity high limit */
-#define AMS_CTRLX 0x28 /* control X */
-#define AMS_CTRLY 0x29 /* control Y */
-#define AMS_CTRLZ 0x2A /* control Z */
-#define AMS_UNKNOWN1 0x2B /* unknown 1 */
-#define AMS_UNKNOWN2 0x2C /* unknown 2 */
-#define AMS_UNKNOWN3 0x2D /* unknown 3 */
-#define AMS_VENDOR 0x2E /* vendor */
-
-/* AMS commands - use with the AMS_COMMAND register */
-enum ams_i2c_cmd {
- AMS_CMD_NOOP = 0,
- AMS_CMD_VERSION,
- AMS_CMD_READMEM,
- AMS_CMD_WRITEMEM,
- AMS_CMD_ERASEMEM,
- AMS_CMD_READEE,
- AMS_CMD_WRITEEE,
- AMS_CMD_RESET,
- AMS_CMD_START,
-};
-
-static int ams_i2c_probe(struct i2c_client *client,
- const struct i2c_device_id *id);
-static int ams_i2c_remove(struct i2c_client *client);
-
-static const struct i2c_device_id ams_id[] = {
- { "ams", 0 },
- { }
-};
-MODULE_DEVICE_TABLE(i2c, ams_id);
-
-static struct i2c_driver ams_i2c_driver = {
- .driver = {
- .name = "ams",
- .owner = THIS_MODULE,
- },
- .probe = ams_i2c_probe,
- .remove = ams_i2c_remove,
- .id_table = ams_id,
-};
-
-static s32 ams_i2c_read(u8 reg)
-{
- return i2c_smbus_read_byte_data(ams_info.i2c_client, reg);
-}
-
-static int ams_i2c_write(u8 reg, u8 value)
-{
- return i2c_smbus_write_byte_data(ams_info.i2c_client, reg, value);
-}
-
-static int ams_i2c_cmd(enum ams_i2c_cmd cmd)
-{
- s32 result;
- int count = 3;
-
- ams_i2c_write(AMS_COMMAND, cmd);
- msleep(5);
-
- while (count--) {
- result = ams_i2c_read(AMS_COMMAND);
- if (result == 0 || result & 0x80)
- return 0;
-
- schedule_timeout_uninterruptible(HZ / 20);
- }
-
- return -1;
-}
-
-static void ams_i2c_set_irq(enum ams_irq reg, char enable)
-{
- if (reg & AMS_IRQ_FREEFALL) {
- u8 val = ams_i2c_read(AMS_CTRLX);
- if (enable)
- val |= 0x80;
- else
- val &= ~0x80;
- ams_i2c_write(AMS_CTRLX, val);
- }
-
- if (reg & AMS_IRQ_SHOCK) {
- u8 val = ams_i2c_read(AMS_CTRLY);
- if (enable)
- val |= 0x80;
- else
- val &= ~0x80;
- ams_i2c_write(AMS_CTRLY, val);
- }
-
- if (reg & AMS_IRQ_GLOBAL) {
- u8 val = ams_i2c_read(AMS_CTRLZ);
- if (enable)
- val |= 0x80;
- else
- val &= ~0x80;
- ams_i2c_write(AMS_CTRLZ, val);
- }
-}
-
-static void ams_i2c_clear_irq(enum ams_irq reg)
-{
- if (reg & AMS_IRQ_FREEFALL)
- ams_i2c_write(AMS_FREEFALL, 0);
-
- if (reg & AMS_IRQ_SHOCK)
- ams_i2c_write(AMS_SHOCK, 0);
-}
-
-static u8 ams_i2c_get_vendor(void)
-{
- return ams_i2c_read(AMS_VENDOR);
-}
-
-static void ams_i2c_get_xyz(s8 *x, s8 *y, s8 *z)
-{
- *x = ams_i2c_read(AMS_DATAX);
- *y = ams_i2c_read(AMS_DATAY);
- *z = ams_i2c_read(AMS_DATAZ);
-}
-
-static int ams_i2c_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
-{
- int vmaj, vmin;
- int result;
-
- /* There can be only one */
- if (unlikely(ams_info.has_device))
- return -ENODEV;
-
- ams_info.i2c_client = client;
-
- if (ams_i2c_cmd(AMS_CMD_RESET)) {
- printk(KERN_INFO "ams: Failed to reset the device\n");
- return -ENODEV;
- }
-
- if (ams_i2c_cmd(AMS_CMD_START)) {
- printk(KERN_INFO "ams: Failed to start the device\n");
- return -ENODEV;
- }
-
- /* get version/vendor information */
- ams_i2c_write(AMS_CTRL1, 0x02);
- ams_i2c_write(AMS_CTRL2, 0x85);
- ams_i2c_write(AMS_CTRL3, 0x01);
-
- ams_i2c_cmd(AMS_CMD_READMEM);
-
- vmaj = ams_i2c_read(AMS_DATA1);
- vmin = ams_i2c_read(AMS_DATA2);
- if (vmaj != 1 || vmin != 52) {
- printk(KERN_INFO "ams: Incorrect device version (%d.%d)\n",
- vmaj, vmin);
- return -ENODEV;
- }
-
- ams_i2c_cmd(AMS_CMD_VERSION);
-
- vmaj = ams_i2c_read(AMS_DATA1);
- vmin = ams_i2c_read(AMS_DATA2);
- if (vmaj != 0 || vmin != 1) {
- printk(KERN_INFO "ams: Incorrect firmware version (%d.%d)\n",
- vmaj, vmin);
- return -ENODEV;
- }
-
- /* Disable interrupts */
- ams_i2c_set_irq(AMS_IRQ_ALL, 0);
-
- result = ams_sensor_attach();
- if (result < 0)
- return result;
-
- /* Set default values */
- ams_i2c_write(AMS_SENSLOW, 0x15);
- ams_i2c_write(AMS_SENSHIGH, 0x60);
- ams_i2c_write(AMS_CTRLX, 0x08);
- ams_i2c_write(AMS_CTRLY, 0x0F);
- ams_i2c_write(AMS_CTRLZ, 0x4F);
- ams_i2c_write(AMS_UNKNOWN1, 0x14);
-
- /* Clear interrupts */
- ams_i2c_clear_irq(AMS_IRQ_ALL);
-
- ams_info.has_device = 1;
-
- /* Enable interrupts */
- ams_i2c_set_irq(AMS_IRQ_ALL, 1);
-
- printk(KERN_INFO "ams: Found I2C based motion sensor\n");
-
- return 0;
-}
-
-static int ams_i2c_remove(struct i2c_client *client)
-{
- if (ams_info.has_device) {
- ams_sensor_detach();
-
- /* Disable interrupts */
- ams_i2c_set_irq(AMS_IRQ_ALL, 0);
-
- /* Clear interrupts */
- ams_i2c_clear_irq(AMS_IRQ_ALL);
-
- printk(KERN_INFO "ams: Unloading\n");
-
- ams_info.has_device = 0;
- }
-
- return 0;
-}
-
-static void ams_i2c_exit(void)
-{
- i2c_del_driver(&ams_i2c_driver);
-}
-
-int __init ams_i2c_init(struct device_node *np)
-{
- int result;
-
- /* Set implementation stuff */
- ams_info.of_node = np;
- ams_info.exit = ams_i2c_exit;
- ams_info.get_vendor = ams_i2c_get_vendor;
- ams_info.get_xyz = ams_i2c_get_xyz;
- ams_info.clear_irq = ams_i2c_clear_irq;
- ams_info.bustype = BUS_I2C;
-
- result = i2c_add_driver(&ams_i2c_driver);
-
- return result;
-}
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