diff options
| -rw-r--r-- | drivers/hwmon/Kconfig | 25 | ||||
| -rw-r--r-- | drivers/hwmon/Makefile | 1 | ||||
| -rw-r--r-- | drivers/hwmon/ams/Makefile | 8 | ||||
| -rw-r--r-- | drivers/hwmon/ams/ams-core.c | 265 | ||||
| -rw-r--r-- | drivers/hwmon/ams/ams-i2c.c | 299 | ||||
| -rw-r--r-- | drivers/hwmon/ams/ams-input.c | 160 | ||||
| -rw-r--r-- | drivers/hwmon/ams/ams-pmu.c | 207 | ||||
| -rw-r--r-- | drivers/hwmon/ams/ams.h | 72 |
8 files changed, 1037 insertions, 0 deletions
diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 23b7eac563b..891ef6d0b1b 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -106,6 +106,31 @@ config SENSORS_K8TEMP This driver can also be built as a module. If so, the module will be called k8temp. +config SENSORS_AMS + tristate "Apple Motion Sensor driver" + depends on HWMON && PPC_PMAC && !PPC64 && INPUT && ((ADB_PMU && I2C = y) || (ADB_PMU && !I2C) || I2C) && EXPERIMENTAL + help + Support for the motion sensor included in PowerBooks. Includes + implementations for PMU and I2C. + + This driver can also be built as a module. If so, the module + will be called ams. + +config SENSORS_AMS_PMU + bool "PMU variant" + depends on SENSORS_AMS && ADB_PMU + default y + help + PMU variant of motion sensor, found in late 2005 PowerBooks. + +config SENSORS_AMS_I2C + bool "I2C variant" + depends on SENSORS_AMS && I2C + default y + help + I2C variant of motion sensor, found in early 2005 PowerBooks and + iBooks. + config SENSORS_ASB100 tristate "Asus ASB100 Bach" depends on HWMON && I2C && EXPERIMENTAL diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index 8b0a8b54a36..31661124271 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -19,6 +19,7 @@ obj-$(CONFIG_SENSORS_ADM1025) += adm1025.o obj-$(CONFIG_SENSORS_ADM1026) += adm1026.o obj-$(CONFIG_SENSORS_ADM1031) += adm1031.o obj-$(CONFIG_SENSORS_ADM9240) += adm9240.o +obj-$(CONFIG_SENSORS_AMS) += ams/ obj-$(CONFIG_SENSORS_ATXP1) += atxp1.o obj-$(CONFIG_SENSORS_DS1621) += ds1621.o obj-$(CONFIG_SENSORS_F71805F) += f71805f.o diff --git a/drivers/hwmon/ams/Makefile b/drivers/hwmon/ams/Makefile new file mode 100644 index 00000000000..41c95b2089d --- /dev/null +++ b/drivers/hwmon/ams/Makefile @@ -0,0 +1,8 @@ +# +# 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/hwmon/ams/ams-core.c b/drivers/hwmon/ams/ams-core.c new file mode 100644 index 00000000000..f1f0f5d0442 --- /dev/null +++ b/drivers/hwmon/ams/ams-core.c @@ -0,0 +1,265 @@ +/* + * Apple Motion Sensor driver + * + * Copyright (C) 2005 Stelian Pop (stelian@popies.net) + * Copyright (C) 2006 Michael Hanselmann (linux-kernel@hansmi.ch) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/module.h> +#include <asm/pmac_pfunc.h> +#include <asm/of_platform.h> + +#include "ams.h" + +/* There is only one motion sensor per machine */ +struct ams ams_info; + +static unsigned int 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 snprintf(buf, PAGE_SIZE, "%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) +{ + mutex_lock(&ams_info.lock); + + if (ams_info.has_device) { + unsigned long flags; + + spin_lock_irqsave(&ams_info.irq_lock, flags); + + if (ams_info.worker_irqs & AMS_IRQ_FREEFALL) { + if (verbose) + printk(KERN_INFO "ams: freefall detected!\n"); + + ams_info.worker_irqs &= ~AMS_IRQ_FREEFALL; + + /* we must call this with interrupts enabled */ + spin_unlock_irqrestore(&ams_info.irq_lock, flags); + ams_info.clear_irq(AMS_IRQ_FREEFALL); + spin_lock_irqsave(&ams_info.irq_lock, flags); + } + + if (ams_info.worker_irqs & AMS_IRQ_SHOCK) { + if (verbose) + printk(KERN_INFO "ams: shock detected!\n"); + + ams_info.worker_irqs &= ~AMS_IRQ_SHOCK; + + /* we must call this with interrupts enabled */ + spin_unlock_irqrestore(&ams_info.irq_lock, flags); + ams_info.clear_irq(AMS_IRQ_SHOCK); + spin_lock_irqsave(&ams_info.irq_lock, flags); + } + + spin_unlock_irqrestore(&ams_info.irq_lock, flags); + } + + mutex_unlock(&ams_info.lock); +} + +/* Call with ams_info.lock held! */ +int ams_sensor_attach(void) +{ + int result; + u32 *prop; + + /* Get orientation */ + prop = (u32*)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; +} + +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 && 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 && device_is_compatible(np, "sms")) + /* Found PMU motion sensor */ + return ams_pmu_init(np); +#endif + + printk(KERN_ERR "ams: No motion sensor found.\n"); + + return -ENODEV; +} + +void ams_exit(void) +{ + mutex_lock(&ams_info.lock); + + if (ams_info.has_device) { + /* Remove input device */ + ams_input_exit(); + + /* Shut down implementation */ + ams_info.exit(); + + /* Flush interrupt worker + * + * We do this after ams_info.exit(), because an interrupt might + * have arrived before disabling them. + */ + flush_scheduled_work(); + + /* Remove attributes */ + device_remove_file(&ams_info.of_dev->dev, &dev_attr_current); + + /* 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); + } + + mutex_unlock(&ams_info.lock); +} + +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/hwmon/ams/ams-i2c.c b/drivers/hwmon/ams/ams-i2c.c new file mode 100644 index 00000000000..0d24bdfea53 --- /dev/null +++ b/drivers/hwmon/ams/ams-i2c.c @@ -0,0 +1,299 @@ +/* + * 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_attach(struct i2c_adapter *adapter); +static int ams_i2c_detach(struct i2c_adapter *adapter); + +static struct i2c_driver ams_i2c_driver = { + .driver = { + .name = "ams", + .owner = THIS_MODULE, + }, + .attach_adapter = ams_i2c_attach, + .detach_adapter = ams_i2c_detach, +}; + +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 remaining = HZ / 20; + + ams_i2c_write(AMS_COMMAND, cmd); + mdelay(5); + + while (remaining) { + result = ams_i2c_read(AMS_COMMAND); + if (result == 0 || result & 0x80) + return 0; + + remaining = schedule_timeout(remaining); + } + + 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_attach(struct i2c_adapter *adapter) +{ + unsigned long bus; + int vmaj, vmin; + int result; + + /* There can be only one */ + if (unlikely(ams_info.has_device)) + return -ENODEV; + + if (strncmp(adapter->name, "uni-n", 5)) + return -ENODEV; + + bus = simple_strtoul(adapter->name + 6, NULL, 10); + if (bus != ams_info.i2c_bus) + return -ENODEV; + + ams_info.i2c_client.addr = ams_info.i2c_address; + ams_info.i2c_client.adapter = adapter; + ams_info.i2c_client.driver = &ams_i2c_driver; + strcpy(ams_info.i2c_client.name, "Apple Motion Sensor"); + + 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_detach(struct i2c_adapter *adapter) +{ + if (ams_info.has_device) { + /* 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) +{ + char *tmp_bus; + int result; + u32 *prop; + + mutex_lock(&ams_info.lock); + + /* 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; + + /* look for bus either using "reg" or by path */ + prop = (u32*)get_property(ams_info.of_node, "reg", NULL); + if (!prop) { + result = -ENODEV; + + goto exit; + } + + tmp_bus = strstr(ams_info.of_node->full_name, "/i2c-bus@"); + if (tmp_bus) + ams_info.i2c_bus = *(tmp_bus + 9) - '0'; + else + ams_info.i2c_bus = ((*prop) >> 8) & 0x0f; + ams_info.i2c_address = ((*prop) & 0xff) >> 1; + + result = i2c_add_driver(&ams_i2c_driver); + +exit: + mutex_unlock(&ams_info.lock); + + return result; +} diff --git a/drivers/hwmon/ams/ams-input.c b/drivers/hwmon/ams/ams-input.c new file mode 100644 index 00000000000..f126aa48513 --- /dev/null +++ b/drivers/hwmon/ams/ams-input.c @@ -0,0 +1,160 @@ +/* + * Apple Motion Sensor driver (joystick emulation) + * + * Copyright (C) 2005 Stelian Pop (stelian@popies.net) + * Copyright (C) 2006 Michael Hanselmann (linux-kernel@hansmi.ch) + * + * 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" + +static unsigned int joystick; +module_param(joystick, bool, 0644); +MODULE_PARM_DESC(joystick, "Enable the input class device on module load"); + +static unsigned int invert; +module_param(invert, bool, 0644); +MODULE_PARM_DESC(invert, "Invert input data on X and Y axis"); + +static int ams_input_kthread(void *data) +{ + s8 x, y, z; + + while (!kthread_should_stop()) { + 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(ams_info.idev, ABS_X, invert ? -x : x); + input_report_abs(ams_info.idev, ABS_Y, invert ? -y : y); + input_report_abs(ams_info.idev, ABS_Z, z); + + input_sync(ams_info.idev); + + mutex_unlock(&ams_info.lock); + + msleep(25); + } + + return 0; +} + +static int ams_input_open(struct input_dev *dev) +{ + ams_info.kthread = kthread_run(ams_input_kthread, NULL, "kams"); + return IS_ERR(ams_info.kthread) ? PTR_ERR(ams_info.kthread) : 0; +} + +static void ams_input_close(struct input_dev *dev) +{ + kthread_stop(ams_info.kthread); +} + +/* Call with ams_info.lock held! */ +static void ams_input_enable(void) +{ + s8 x, y, z; + + if (ams_info.idev) + return; + + ams_sensors(&x, &y, &z); + ams_info.xcalib = x; + ams_info.ycalib = y; + ams_info.zcalib = z; + + ams_info.idev = input_allocate_device(); + if (!ams_info.idev) + return; + + ams_info.idev->name = "Apple Motion Sensor"; + ams_info.idev->id.bustype = ams_info.bustype; + ams_info.idev->id.vendor = 0; + ams_info.idev->open = ams_input_open; + ams_info.idev->close = ams_input_close; + ams_info.idev->cdev.dev = &ams_info.of_dev->dev; + + input_set_abs_params(ams_info.idev, ABS_X, -50, 50, 3, 0); + input_set_abs_params(ams_info.idev, ABS_Y, -50, 50, 3, 0); + input_set_abs_params(ams_info.idev, ABS_Z, -50, 50, 3, 0); + + set_bit(EV_ABS, ams_info.idev->evbit); + set_bit(EV_KEY, ams_info.idev->evbit); + set_bit(BTN_TOUCH, ams_info.idev->keybit); + + if (input_register_device(ams_info.idev)) { + input_free_device(ams_info.idev); + ams_info.idev = NULL; + return; + } +} + +/* Call with ams_info.lock held! */ +static void ams_input_disable(void) +{ + if (ams_info.idev) { + input_unregister_device(ams_info.idev); + ams_info.idev = NULL; + } +} + +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) +{ + if (sscanf(buf, "%d\n", &joystick) != 1) + return -EINVAL; + + mutex_lock(&ams_info.lock); + + if (joystick) + ams_input_enable(); + else + ams_input_disable(); + + mutex_unlock(&ams_info.lock); + + return count; +} + +static DEVICE_ATTR(joystick, S_IRUGO | S_IWUSR, + ams_input_show_joystick, ams_input_store_joystick); + +/* Call with ams_info.lock held! */ +int ams_input_init(void) +{ + int result; + + result = device_create_file(&ams_info.of_dev->dev, &dev_attr_joystick); + + if (!result && joystick) + ams_input_enable(); + return result; +} + +/* Call with ams_info.lock held! */ +void ams_input_exit() +{ + ams_input_disable(); + device_remove_file(&ams_info.of_dev->dev, &dev_attr_joystick); +} diff --git a/drivers/hwmon/ams/ams-pmu.c b/drivers/hwmon/ams/ams-pmu.c new file mode 100644 index 00000000000..4636ae031a5 --- /dev/null +++ b/drivers/hwmon/ams/ams-pmu.c @@ -0,0 +1,207 @@ +/* + * Apple Motion Sensor driver (PMU variant) + * + * Copyright (C) 2006 Michael Hanselmann (linux-kernel@hansmi.ch) + * + * 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/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) +{ + /* 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) +{ + u32 *prop; + int result; + + mutex_lock(&ams_info.lock); + + /* 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 = (u32*)get_property(ams_info.of_node, "reg", NULL); + if (!prop) { + result = -ENODEV; + goto exit; + } + 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) + goto exit; + + /* 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"); + + result = 0; + +exit: + mutex_unlock(&ams_info.lock); + + return result; +} diff --git a/drivers/hwmon/ams/ams.h b/drivers/hwmon/ams/ams.h new file mode 100644 index 00000000000..240730e6bcd --- /dev/null +++ b/drivers/hwmon/ams/ams.h @@ -0,0 +1,72 @@ +#include <linux/i2c.h> +#include <linux/input.h> +#include <linux/kthread.h> +#include <linux/mutex.h> +#include <linux/spinlock.h> +#include <linux/types.h> +#include <asm/of_device.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 of_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 */ + int i2c_bus; + int i2c_address; + struct i2c_client i2c_client; +#endif + + /* Joystick emulation */ + struct task_struct *kthread; + 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 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); |