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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/macintosh/ams
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/macintosh/ams')
-rw-r--r--drivers/macintosh/ams/Makefile9
-rw-r--r--drivers/macintosh/ams/ams-core.c237
-rw-r--r--drivers/macintosh/ams/ams-i2c.c264
-rw-r--r--drivers/macintosh/ams/ams-input.c156
-rw-r--r--drivers/macintosh/ams/ams-pmu.c197
-rw-r--r--drivers/macintosh/ams/ams.h76
6 files changed, 939 insertions, 0 deletions
diff --git a/drivers/macintosh/ams/Makefile b/drivers/macintosh/ams/Makefile
new file mode 100644
index 0000000000..3b58d02c9c
--- /dev/null
+++ b/drivers/macintosh/ams/Makefile
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for Apple Motion Sensor driver
+#
+
+ams-y := ams-core.o ams-input.o
+ams-$(CONFIG_SENSORS_AMS_PMU) += ams-pmu.o
+ams-$(CONFIG_SENSORS_AMS_I2C) += ams-i2c.o
+obj-$(CONFIG_SENSORS_AMS) += ams.o
diff --git a/drivers/macintosh/ams/ams-core.c b/drivers/macintosh/ams/ams-core.c
new file mode 100644
index 0000000000..c978b4272d
--- /dev/null
+++ b/drivers/macintosh/ams/ams-core.c
@@ -0,0 +1,237 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Apple Motion Sensor driver
+ *
+ * Copyright (C) 2005 Stelian Pop (stelian@popies.net)
+ * Copyright (C) 2006 Michael Hanselmann (linux-kernel@hansmi.ch)
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/of_platform.h>
+#include <asm/pmac_pfunc.h>
+
+#include "ams.h"
+
+/* There is only one motion sensor per machine */
+struct ams ams_info;
+
+static bool verbose;
+module_param(verbose, bool, 0644);
+MODULE_PARM_DESC(verbose, "Show free falls and shocks in kernel output");
+
+/* Call with ams_info.lock held! */
+void ams_sensors(s8 *x, s8 *y, s8 *z)
+{
+ u32 orient = ams_info.vflag? ams_info.orient1 : ams_info.orient2;
+
+ if (orient & 0x80)
+ /* X and Y swapped */
+ ams_info.get_xyz(y, x, z);
+ else
+ ams_info.get_xyz(x, y, z);
+
+ if (orient & 0x04)
+ *z = ~(*z);
+ if (orient & 0x02)
+ *y = ~(*y);
+ if (orient & 0x01)
+ *x = ~(*x);
+}
+
+static ssize_t ams_show_current(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ s8 x, y, z;
+
+ mutex_lock(&ams_info.lock);
+ ams_sensors(&x, &y, &z);
+ mutex_unlock(&ams_info.lock);
+
+ return sysfs_emit(buf, "%d %d %d\n", x, y, z);
+}
+
+static DEVICE_ATTR(current, S_IRUGO, ams_show_current, NULL);
+
+static void ams_handle_irq(void *data)
+{
+ enum ams_irq irq = *((enum ams_irq *)data);
+
+ spin_lock(&ams_info.irq_lock);
+
+ ams_info.worker_irqs |= irq;
+ schedule_work(&ams_info.worker);
+
+ spin_unlock(&ams_info.irq_lock);
+}
+
+static enum ams_irq ams_freefall_irq_data = AMS_IRQ_FREEFALL;
+static struct pmf_irq_client ams_freefall_client = {
+ .owner = THIS_MODULE,
+ .handler = ams_handle_irq,
+ .data = &ams_freefall_irq_data,
+};
+
+static enum ams_irq ams_shock_irq_data = AMS_IRQ_SHOCK;
+static struct pmf_irq_client ams_shock_client = {
+ .owner = THIS_MODULE,
+ .handler = ams_handle_irq,
+ .data = &ams_shock_irq_data,
+};
+
+/* Once hard disk parking is implemented in the kernel, this function can
+ * trigger it.
+ */
+static void ams_worker(struct work_struct *work)
+{
+ unsigned long flags;
+ u8 irqs_to_clear;
+
+ mutex_lock(&ams_info.lock);
+
+ spin_lock_irqsave(&ams_info.irq_lock, flags);
+ irqs_to_clear = ams_info.worker_irqs;
+
+ if (ams_info.worker_irqs & AMS_IRQ_FREEFALL) {
+ if (verbose)
+ printk(KERN_INFO "ams: freefall detected!\n");
+
+ ams_info.worker_irqs &= ~AMS_IRQ_FREEFALL;
+ }
+
+ if (ams_info.worker_irqs & AMS_IRQ_SHOCK) {
+ if (verbose)
+ printk(KERN_INFO "ams: shock detected!\n");
+
+ ams_info.worker_irqs &= ~AMS_IRQ_SHOCK;
+ }
+
+ spin_unlock_irqrestore(&ams_info.irq_lock, flags);
+
+ ams_info.clear_irq(irqs_to_clear);
+
+ mutex_unlock(&ams_info.lock);
+}
+
+/* Call with ams_info.lock held! */
+int ams_sensor_attach(void)
+{
+ int result;
+ const u32 *prop;
+
+ /* Get orientation */
+ prop = of_get_property(ams_info.of_node, "orientation", NULL);
+ if (!prop)
+ return -ENODEV;
+ ams_info.orient1 = *prop;
+ ams_info.orient2 = *(prop + 1);
+
+ /* Register freefall interrupt handler */
+ result = pmf_register_irq_client(ams_info.of_node,
+ "accel-int-1",
+ &ams_freefall_client);
+ if (result < 0)
+ return -ENODEV;
+
+ /* Reset saved irqs */
+ ams_info.worker_irqs = 0;
+
+ /* Register shock interrupt handler */
+ result = pmf_register_irq_client(ams_info.of_node,
+ "accel-int-2",
+ &ams_shock_client);
+ if (result < 0)
+ goto release_freefall;
+
+ /* Create device */
+ ams_info.of_dev = of_platform_device_create(ams_info.of_node, "ams", NULL);
+ if (!ams_info.of_dev) {
+ result = -ENODEV;
+ goto release_shock;
+ }
+
+ /* Create attributes */
+ result = device_create_file(&ams_info.of_dev->dev, &dev_attr_current);
+ if (result)
+ goto release_of;
+
+ ams_info.vflag = !!(ams_info.get_vendor() & 0x10);
+
+ /* Init input device */
+ result = ams_input_init();
+ if (result)
+ goto release_device_file;
+
+ return result;
+release_device_file:
+ device_remove_file(&ams_info.of_dev->dev, &dev_attr_current);
+release_of:
+ of_device_unregister(ams_info.of_dev);
+release_shock:
+ pmf_unregister_irq_client(&ams_shock_client);
+release_freefall:
+ pmf_unregister_irq_client(&ams_freefall_client);
+ return result;
+}
+
+static int __init ams_init(void)
+{
+ struct device_node *np;
+
+ spin_lock_init(&ams_info.irq_lock);
+ mutex_init(&ams_info.lock);
+ INIT_WORK(&ams_info.worker, ams_worker);
+
+#ifdef CONFIG_SENSORS_AMS_I2C
+ np = of_find_node_by_name(NULL, "accelerometer");
+ if (np && of_device_is_compatible(np, "AAPL,accelerometer_1"))
+ /* Found I2C motion sensor */
+ return ams_i2c_init(np);
+#endif
+
+#ifdef CONFIG_SENSORS_AMS_PMU
+ np = of_find_node_by_name(NULL, "sms");
+ if (np && of_device_is_compatible(np, "sms"))
+ /* Found PMU motion sensor */
+ return ams_pmu_init(np);
+#endif
+ return -ENODEV;
+}
+
+void ams_sensor_detach(void)
+{
+ /* Remove input device */
+ ams_input_exit();
+
+ /* Remove attributes */
+ device_remove_file(&ams_info.of_dev->dev, &dev_attr_current);
+
+ /* Flush interrupt worker
+ *
+ * We do this after ams_info.exit(), because an interrupt might
+ * have arrived before disabling them.
+ */
+ flush_work(&ams_info.worker);
+
+ /* Remove device */
+ of_device_unregister(ams_info.of_dev);
+
+ /* Remove handler */
+ pmf_unregister_irq_client(&ams_shock_client);
+ pmf_unregister_irq_client(&ams_freefall_client);
+}
+
+static void __exit ams_exit(void)
+{
+ /* Shut down implementation */
+ ams_info.exit();
+}
+
+MODULE_AUTHOR("Stelian Pop, Michael Hanselmann");
+MODULE_DESCRIPTION("Apple Motion Sensor driver");
+MODULE_LICENSE("GPL");
+
+module_init(ams_init);
+module_exit(ams_exit);
diff --git a/drivers/macintosh/ams/ams-i2c.c b/drivers/macintosh/ams/ams-i2c.c
new file mode 100644
index 0000000000..f9bfe84b1c
--- /dev/null
+++ b/drivers/macintosh/ams/ams-i2c.c
@@ -0,0 +1,264 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * 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
+ */
+
+#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);
+static void ams_i2c_remove(struct i2c_client *client);
+
+static const struct i2c_device_id ams_id[] = {
+ { "MAC,accelerometer_1", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, ams_id);
+
+static struct i2c_driver ams_i2c_driver = {
+ .driver = {
+ .name = "ams",
+ },
+ .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)
+{
+ 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 void 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;
+ }
+}
+
+static void ams_i2c_exit(void)
+{
+ i2c_del_driver(&ams_i2c_driver);
+}
+
+int __init ams_i2c_init(struct device_node *np)
+{
+ /* 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;
+
+ return i2c_add_driver(&ams_i2c_driver);
+}
diff --git a/drivers/macintosh/ams/ams-input.c b/drivers/macintosh/ams/ams-input.c
new file mode 100644
index 0000000000..0da493d449
--- /dev/null
+++ b/drivers/macintosh/ams/ams-input.c
@@ -0,0 +1,156 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Apple Motion Sensor driver (joystick emulation)
+ *
+ * Copyright (C) 2005 Stelian Pop (stelian@popies.net)
+ * Copyright (C) 2006 Michael Hanselmann (linux-kernel@hansmi.ch)
+ */
+
+#include <linux/module.h>
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+
+#include "ams.h"
+
+static bool joystick;
+module_param(joystick, bool, S_IRUGO);
+MODULE_PARM_DESC(joystick, "Enable the input class device on module load");
+
+static bool invert;
+module_param(invert, bool, S_IWUSR | S_IRUGO);
+MODULE_PARM_DESC(invert, "Invert input data on X and Y axis");
+
+static DEFINE_MUTEX(ams_input_mutex);
+
+static void ams_idev_poll(struct input_dev *idev)
+{
+ s8 x, y, z;
+
+ mutex_lock(&ams_info.lock);
+
+ ams_sensors(&x, &y, &z);
+
+ x -= ams_info.xcalib;
+ y -= ams_info.ycalib;
+ z -= ams_info.zcalib;
+
+ input_report_abs(idev, ABS_X, invert ? -x : x);
+ input_report_abs(idev, ABS_Y, invert ? -y : y);
+ input_report_abs(idev, ABS_Z, z);
+
+ input_sync(idev);
+
+ mutex_unlock(&ams_info.lock);
+}
+
+/* Call with ams_info.lock held! */
+static int ams_input_enable(void)
+{
+ struct input_dev *input;
+ s8 x, y, z;
+ int error;
+
+ ams_sensors(&x, &y, &z);
+ ams_info.xcalib = x;
+ ams_info.ycalib = y;
+ ams_info.zcalib = z;
+
+ input = input_allocate_device();
+ if (!input)
+ return -ENOMEM;
+
+ input->name = "Apple Motion Sensor";
+ input->id.bustype = ams_info.bustype;
+ input->id.vendor = 0;
+ input->dev.parent = &ams_info.of_dev->dev;
+
+ input_set_abs_params(input, ABS_X, -50, 50, 3, 0);
+ input_set_abs_params(input, ABS_Y, -50, 50, 3, 0);
+ input_set_abs_params(input, ABS_Z, -50, 50, 3, 0);
+ input_set_capability(input, EV_KEY, BTN_TOUCH);
+
+ error = input_setup_polling(input, ams_idev_poll);
+ if (error)
+ goto err_free_input;
+
+ input_set_poll_interval(input, 25);
+
+ error = input_register_device(input);
+ if (error)
+ goto err_free_input;
+
+ ams_info.idev = input;
+ joystick = true;
+
+ return 0;
+
+err_free_input:
+ input_free_device(input);
+ return error;
+}
+
+static void ams_input_disable(void)
+{
+ if (ams_info.idev) {
+ input_unregister_device(ams_info.idev);
+ ams_info.idev = NULL;
+ }
+
+ joystick = false;
+}
+
+static ssize_t ams_input_show_joystick(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%d\n", joystick);
+}
+
+static ssize_t ams_input_store_joystick(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ unsigned long enable;
+ int error = 0;
+ int ret;
+
+ ret = kstrtoul(buf, 0, &enable);
+ if (ret)
+ return ret;
+ if (enable > 1)
+ return -EINVAL;
+
+ mutex_lock(&ams_input_mutex);
+
+ if (enable != joystick) {
+ if (enable)
+ error = ams_input_enable();
+ else
+ ams_input_disable();
+ }
+
+ mutex_unlock(&ams_input_mutex);
+
+ return error ? error : count;
+}
+
+static DEVICE_ATTR(joystick, S_IRUGO | S_IWUSR,
+ ams_input_show_joystick, ams_input_store_joystick);
+
+int ams_input_init(void)
+{
+ if (joystick)
+ ams_input_enable();
+
+ return device_create_file(&ams_info.of_dev->dev, &dev_attr_joystick);
+}
+
+void ams_input_exit(void)
+{
+ device_remove_file(&ams_info.of_dev->dev, &dev_attr_joystick);
+
+ mutex_lock(&ams_input_mutex);
+ ams_input_disable();
+ mutex_unlock(&ams_input_mutex);
+}
diff --git a/drivers/macintosh/ams/ams-pmu.c b/drivers/macintosh/ams/ams-pmu.c
new file mode 100644
index 0000000000..1c3ce39e9a
--- /dev/null
+++ b/drivers/macintosh/ams/ams-pmu.c
@@ -0,0 +1,197 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Apple Motion Sensor driver (PMU variant)
+ *
+ * Copyright (C) 2006 Michael Hanselmann (linux-kernel@hansmi.ch)
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/adb.h>
+#include <linux/pmu.h>
+
+#include "ams.h"
+
+/* Attitude */
+#define AMS_X 0x00
+#define AMS_Y 0x01
+#define AMS_Z 0x02
+
+/* Not exactly known, maybe chip vendor */
+#define AMS_VENDOR 0x03
+
+/* Freefall registers */
+#define AMS_FF_CLEAR 0x04
+#define AMS_FF_ENABLE 0x05
+#define AMS_FF_LOW_LIMIT 0x06
+#define AMS_FF_DEBOUNCE 0x07
+
+/* Shock registers */
+#define AMS_SHOCK_CLEAR 0x08
+#define AMS_SHOCK_ENABLE 0x09
+#define AMS_SHOCK_HIGH_LIMIT 0x0a
+#define AMS_SHOCK_DEBOUNCE 0x0b
+
+/* Global interrupt and power control register */
+#define AMS_CONTROL 0x0c
+
+static u8 ams_pmu_cmd;
+
+static void ams_pmu_req_complete(struct adb_request *req)
+{
+ complete((struct completion *)req->arg);
+}
+
+/* Only call this function from task context */
+static void ams_pmu_set_register(u8 reg, u8 value)
+{
+ static struct adb_request req;
+ DECLARE_COMPLETION(req_complete);
+
+ req.arg = &req_complete;
+ if (pmu_request(&req, ams_pmu_req_complete, 4, ams_pmu_cmd, 0x00, reg, value))
+ return;
+
+ wait_for_completion(&req_complete);
+}
+
+/* Only call this function from task context */
+static u8 ams_pmu_get_register(u8 reg)
+{
+ static struct adb_request req;
+ DECLARE_COMPLETION(req_complete);
+
+ req.arg = &req_complete;
+ if (pmu_request(&req, ams_pmu_req_complete, 3, ams_pmu_cmd, 0x01, reg))
+ return 0;
+
+ wait_for_completion(&req_complete);
+
+ if (req.reply_len > 0)
+ return req.reply[0];
+ else
+ return 0;
+}
+
+/* Enables or disables the specified interrupts */
+static void ams_pmu_set_irq(enum ams_irq reg, char enable)
+{
+ if (reg & AMS_IRQ_FREEFALL) {
+ u8 val = ams_pmu_get_register(AMS_FF_ENABLE);
+ if (enable)
+ val |= 0x80;
+ else
+ val &= ~0x80;
+ ams_pmu_set_register(AMS_FF_ENABLE, val);
+ }
+
+ if (reg & AMS_IRQ_SHOCK) {
+ u8 val = ams_pmu_get_register(AMS_SHOCK_ENABLE);
+ if (enable)
+ val |= 0x80;
+ else
+ val &= ~0x80;
+ ams_pmu_set_register(AMS_SHOCK_ENABLE, val);
+ }
+
+ if (reg & AMS_IRQ_GLOBAL) {
+ u8 val = ams_pmu_get_register(AMS_CONTROL);
+ if (enable)
+ val |= 0x80;
+ else
+ val &= ~0x80;
+ ams_pmu_set_register(AMS_CONTROL, val);
+ }
+}
+
+static void ams_pmu_clear_irq(enum ams_irq reg)
+{
+ if (reg & AMS_IRQ_FREEFALL)
+ ams_pmu_set_register(AMS_FF_CLEAR, 0x00);
+
+ if (reg & AMS_IRQ_SHOCK)
+ ams_pmu_set_register(AMS_SHOCK_CLEAR, 0x00);
+}
+
+static u8 ams_pmu_get_vendor(void)
+{
+ return ams_pmu_get_register(AMS_VENDOR);
+}
+
+static void ams_pmu_get_xyz(s8 *x, s8 *y, s8 *z)
+{
+ *x = ams_pmu_get_register(AMS_X);
+ *y = ams_pmu_get_register(AMS_Y);
+ *z = ams_pmu_get_register(AMS_Z);
+}
+
+static void ams_pmu_exit(void)
+{
+ ams_sensor_detach();
+
+ /* Disable interrupts */
+ ams_pmu_set_irq(AMS_IRQ_ALL, 0);
+
+ /* Clear interrupts */
+ ams_pmu_clear_irq(AMS_IRQ_ALL);
+
+ ams_info.has_device = 0;
+
+ printk(KERN_INFO "ams: Unloading\n");
+}
+
+int __init ams_pmu_init(struct device_node *np)
+{
+ const u32 *prop;
+ int result;
+
+ /* Set implementation stuff */
+ ams_info.of_node = np;
+ ams_info.exit = ams_pmu_exit;
+ ams_info.get_vendor = ams_pmu_get_vendor;
+ ams_info.get_xyz = ams_pmu_get_xyz;
+ ams_info.clear_irq = ams_pmu_clear_irq;
+ ams_info.bustype = BUS_HOST;
+
+ /* Get PMU command, should be 0x4e, but we can never know */
+ prop = of_get_property(ams_info.of_node, "reg", NULL);
+ if (!prop)
+ return -ENODEV;
+
+ ams_pmu_cmd = ((*prop) >> 8) & 0xff;
+
+ /* Disable interrupts */
+ ams_pmu_set_irq(AMS_IRQ_ALL, 0);
+
+ /* Clear interrupts */
+ ams_pmu_clear_irq(AMS_IRQ_ALL);
+
+ result = ams_sensor_attach();
+ if (result < 0)
+ return result;
+
+ /* Set default values */
+ ams_pmu_set_register(AMS_FF_LOW_LIMIT, 0x15);
+ ams_pmu_set_register(AMS_FF_ENABLE, 0x08);
+ ams_pmu_set_register(AMS_FF_DEBOUNCE, 0x14);
+
+ ams_pmu_set_register(AMS_SHOCK_HIGH_LIMIT, 0x60);
+ ams_pmu_set_register(AMS_SHOCK_ENABLE, 0x0f);
+ ams_pmu_set_register(AMS_SHOCK_DEBOUNCE, 0x14);
+
+ ams_pmu_set_register(AMS_CONTROL, 0x4f);
+
+ /* Clear interrupts */
+ ams_pmu_clear_irq(AMS_IRQ_ALL);
+
+ ams_info.has_device = 1;
+
+ /* Enable interrupts */
+ ams_pmu_set_irq(AMS_IRQ_ALL, 1);
+
+ printk(KERN_INFO "ams: Found PMU based motion sensor\n");
+
+ return 0;
+}
diff --git a/drivers/macintosh/ams/ams.h b/drivers/macintosh/ams/ams.h
new file mode 100644
index 0000000000..5b295f5eef
--- /dev/null
+++ b/drivers/macintosh/ams/ams.h
@@ -0,0 +1,76 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _AMS_H
+#define _AMS_H
+
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/kthread.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+
+enum ams_irq {
+ AMS_IRQ_FREEFALL = 0x01,
+ AMS_IRQ_SHOCK = 0x02,
+ AMS_IRQ_GLOBAL = 0x04,
+ AMS_IRQ_ALL =
+ AMS_IRQ_FREEFALL |
+ AMS_IRQ_SHOCK |
+ AMS_IRQ_GLOBAL,
+};
+
+struct ams {
+ /* Locks */
+ spinlock_t irq_lock;
+ struct mutex lock;
+
+ /* General properties */
+ struct device_node *of_node;
+ struct platform_device *of_dev;
+ char has_device;
+ char vflag;
+ u32 orient1;
+ u32 orient2;
+
+ /* Interrupt worker */
+ struct work_struct worker;
+ u8 worker_irqs;
+
+ /* Implementation
+ *
+ * Only call these functions with the main lock held.
+ */
+ void (*exit)(void);
+
+ void (*get_xyz)(s8 *x, s8 *y, s8 *z);
+ u8 (*get_vendor)(void);
+
+ void (*clear_irq)(enum ams_irq reg);
+
+#ifdef CONFIG_SENSORS_AMS_I2C
+ /* I2C properties */
+ struct i2c_client *i2c_client;
+#endif
+
+ /* Joystick emulation */
+ struct input_dev *idev;
+ __u16 bustype;
+
+ /* calibrated null values */
+ int xcalib, ycalib, zcalib;
+};
+
+extern struct ams ams_info;
+
+extern void ams_sensors(s8 *x, s8 *y, s8 *z);
+extern int ams_sensor_attach(void);
+extern void ams_sensor_detach(void);
+
+extern int ams_pmu_init(struct device_node *np);
+extern int ams_i2c_init(struct device_node *np);
+
+extern int ams_input_init(void);
+extern void ams_input_exit(void);
+
+#endif /* _AMS_H */