Commit 40cb7613 authored by Irina Tirdea's avatar Irina Tirdea Committed by Jonathan Cameron
Browse files

iio: add driver for Freescale MMA9553 

Add support for Freescale MMA9553L Intelligent Pedometer Platform.

The following functionalities are supported:
 - step counter (counts the number of steps using a HW register)
 - step detector (generates an iio event at every step the user takes)
 - activity recognition (rest, walking, jogging, running)
 - speed
 - calories
 - distance

To get accurate pedometer results, the user's height, weight and gender
need to be configured.

The specifications can be downloaded from:
http://www.freescale.com/files/sensors/doc/ref_manual/MMA955xLSWRM.pdf
http://www.freescale.com/files/sensors/doc/ref_manual/MMA9553LSWRM.pdf



Signed-off-by: default avatarIrina Tirdea <irina.tirdea@intel.com>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent 81110933

Documentation/ABI/testing/sysfs-bus-iio

+45 −4
Original line number Diff line number Diff line
@@ -343,7 +343,30 @@ Description: 
		production inaccuracies).  If shared across all channels,

		<type>_calibscale is used.



What:		/sys/bus/iio/devices/iio:deviceX/in_steps_calibheight

What:		/sys/bus/iio/devices/iio:deviceX/in_activity_calibgender

What:		/sys/bus/iio/devices/iio:deviceX/in_energy_calibgender

What:		/sys/bus/iio/devices/iio:deviceX/in_distance_calibgender

What:		/sys/bus/iio/devices/iio:deviceX/in_velocity_calibgender

KernelVersion:	3.20

Contact:	linux-iio@vger.kernel.org

Description:

		Gender of the user (e.g.: male, female) used by some pedometers

		to compute the stride length, distance, speed and activity

		type.



What:		/sys/bus/iio/devices/iio:deviceX/in_activity_calibgender_available

What:		/sys/bus/iio/devices/iio:deviceX/in_energy_calibgender_available

What:		/sys/bus/iio/devices/iio:deviceX/in_distance_calibgender_available

What:		/sys/bus/iio/devices/iio:deviceX/in_velocity_calibgender_available

KernelVersion:	3.20

Contact:	linux-iio@vger.kernel.org

Description:

		Lists all available gender values (e.g.: male, female).



What:		/sys/bus/iio/devices/iio:deviceX/in_activity_calibheight

What:		/sys/bus/iio/devices/iio:deviceX/in_energy_calibheight

What:		/sys/bus/iio/devices/iio:deviceX/in_distance_calibheight

What:		/sys/bus/iio/devices/iio:deviceX/in_velocity_calibheight

KernelVersion:	3.19

Contact:	linux-iio@vger.kernel.org

Description:
@@ -818,6 +841,14 @@ What: /sys/.../events/in_tempY_roc_falling_period 
What:		/sys/.../events/in_accel_x&y&z_mag_falling_period

What:		/sys/.../events/in_intensity0_thresh_period

What:		/sys/.../events/in_proximity0_thresh_period

What:		/sys/.../events/in_activity_still_thresh_rising_period

What:		/sys/.../events/in_activity_still_thresh_falling_period

What:		/sys/.../events/in_activity_walking_thresh_rising_period

What:		/sys/.../events/in_activity_walking_thresh_falling_period

What:		/sys/.../events/in_activity_jogging_thresh_rising_period

What:		/sys/.../events/in_activity_jogging_thresh_falling_period

What:		/sys/.../events/in_activity_running_thresh_rising_period

What:		/sys/.../events/in_activity_running_thresh_falling_period

KernelVersion:	2.6.37

Contact:	linux-iio@vger.kernel.org

Description:
@@ -1142,6 +1173,12 @@ Description: 
		This attribute is used to get/set the integration time in

		seconds.



What:		/sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_integration_time

KernelVersion:	3.20

Contact:	linux-iio@vger.kernel.org

Description:

		Number of seconds in which to compute speed.



What:		/sys/bus/iio/devices/iio:deviceX/in_rot_quaternion_raw

KernelVersion:	3.15

Contact:	linux-iio@vger.kernel.org
@@ -1170,13 +1207,17 @@ Description: 
		present, output should be considered as processed with the

		unit in milliamps.



What:		/sys/.../iio:deviceX/in_energy_en

What:		/sys/.../iio:deviceX/in_distance_en

What:		/sys/.../iio:deviceX/in_velocity_sqrt(x^2+y^2+z^2)_en

What:		/sys/.../iio:deviceX/in_steps_en

KernelVersion:	3.19

Contact:	linux-iio@vger.kernel.org

Description:

		Activates the step counter. After activation, the number of steps

		taken by the user will be counted in hardware and exported through

		in_steps_input.

		Activates a device feature that runs in firmware/hardware.

		E.g. for steps: the pedometer saves power while not used;

		when activated, it will count the steps taken by the user in

		firmware and export them through in_steps_input.



What:		/sys/.../iio:deviceX/in_steps_input

KernelVersion:	3.19

drivers/iio/accel/Kconfig

+10 −0
Original line number Diff line number Diff line
@@ -126,4 +126,14 @@ config MMA9551 
	  To compile this driver as a module, choose M here: the module

	  will be called mma9551.



config MMA9553

	tristate "Freescale MMA9553L Intelligent Pedometer Platform Driver"

	depends on I2C

	select MMA9551_CORE

	help

	  Say yes here to build support for the Freescale MMA9553L

	  Intelligent Pedometer Platform Driver.



	  To compile this driver as a module, choose M here: the module

	  will be called mma9553.

endmenu

drivers/iio/accel/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ obj-$(CONFIG_MMA8452) += mma8452.o 


obj-$(CONFIG_MMA9551_CORE)	+= mma9551_core.o

obj-$(CONFIG_MMA9551)		+= mma9551.o

obj-$(CONFIG_MMA9553)		+= mma9553.o



obj-$(CONFIG_IIO_SSP_SENSORS_COMMONS) += ssp_accel_sensor.o

drivers/iio/accel/mma9551_core.c

+183 −0
Original line number Diff line number Diff line
@@ -53,6 +53,11 @@ 
#define MMA9551_AFE_Y_ACCEL_REG		0x02

#define MMA9551_AFE_Z_ACCEL_REG		0x04



/* Reset/Suspend/Clear application */

#define MMA9551_RSC_RESET		0x00

#define MMA9551_RSC_OFFSET(mask)	(3 - (ffs(mask) - 1) / 8)

#define MMA9551_RSC_VAL(mask)		(mask >> (((ffs(mask) - 1) / 8) * 8))



/*

 * A response is composed of:

 * - control registers: MB0-3
@@ -274,6 +279,64 @@ int mma9551_read_status_byte(struct i2c_client *client, u8 app_id, 
}

EXPORT_SYMBOL(mma9551_read_status_byte);



/**

 * mma9551_read_config_word() - read 1 config word

 * @client:	I2C client

 * @app_id:	Application ID

 * @reg:	Application register

 * @val:	Pointer to store value read

 *

 * Read one configuration word from the device using MMA955xL command format.

 * Commands to the MMA955xL platform consist of a write followed by one or

 * more reads.

 *

 * Locking note: This function must be called with the device lock held.

 * Locking is not handled inside the function. Callers should ensure they

 * serialize access to the HW.

 *

 * Returns: 0 on success, negative value on failure.

 */

int mma9551_read_config_word(struct i2c_client *client, u8 app_id,

			    u16 reg, u16 *val)

{

	int ret;

	__be16 v;



	ret = mma9551_transfer(client, app_id, MMA9551_CMD_READ_CONFIG,

			       reg, NULL, 0, (u8 *)&v, 2);

	*val = be16_to_cpu(v);



	return ret;

}

EXPORT_SYMBOL(mma9551_read_config_word);



/**

 * mma9551_write_config_word() - write 1 config word

 * @client:	I2C client

 * @app_id:	Application ID

 * @reg:	Application register

 * @val:	Value to write

 *

 * Write one configuration word from the device using MMA955xL command format.

 * Commands to the MMA955xL platform consist of a write followed by one or

 * more reads.

 *

 * Locking note: This function must be called with the device lock held.

 * Locking is not handled inside the function. Callers should ensure they

 * serialize access to the HW.

 *

 * Returns: 0 on success, negative value on failure.

 */

int mma9551_write_config_word(struct i2c_client *client, u8 app_id,

			     u16 reg, u16 val)

{

	__be16 v = cpu_to_be16(val);



	return mma9551_transfer(client, app_id, MMA9551_CMD_WRITE_CONFIG, reg,

				(u8 *) &v, 2, NULL, 0);

}

EXPORT_SYMBOL(mma9551_write_config_word);



/**

 * mma9551_read_status_word() - read 1 status word

 * @client:	I2C client
@@ -305,6 +368,107 @@ int mma9551_read_status_word(struct i2c_client *client, u8 app_id, 
}

EXPORT_SYMBOL(mma9551_read_status_word);



/**

 * mma9551_read_config_words() - read multiple config words

 * @client:	I2C client

 * @app_id:	Application ID

 * @reg:	Application register

 * @len:	Length of array to read in bytes

 * @val:	Array of words to read

 *

 * Read multiple configuration registers (word-sized registers).

 *

 * Locking note: This function must be called with the device lock held.

 * Locking is not handled inside the function. Callers should ensure they

 * serialize access to the HW.

 *

 * Returns: 0 on success, negative value on failure.

 */

int mma9551_read_config_words(struct i2c_client *client, u8 app_id,

			     u16 reg, u8 len, u16 *buf)

{

	int ret, i;

	int len_words = len / sizeof(u16);

	__be16 be_buf[MMA9551_MAX_MAILBOX_DATA_REGS];



	ret = mma9551_transfer(client, app_id, MMA9551_CMD_READ_CONFIG,

			       reg, NULL, 0, (u8 *) be_buf, len);

	if (ret < 0)

		return ret;



	for (i = 0; i < len_words; i++)

		buf[i] = be16_to_cpu(be_buf[i]);



	return 0;

}

EXPORT_SYMBOL(mma9551_read_config_words);



/**

 * mma9551_read_status_words() - read multiple status words

 * @client:	I2C client

 * @app_id:	Application ID

 * @reg:	Application register

 * @len:	Length of array to read in bytes

 * @val:	Array of words to read

 *

 * Read multiple status registers (word-sized registers).

 *

 * Locking note: This function must be called with the device lock held.

 * Locking is not handled inside the function. Callers should ensure they

 * serialize access to the HW.

 *

 * Returns: 0 on success, negative value on failure.

 */

int mma9551_read_status_words(struct i2c_client *client, u8 app_id,

			      u16 reg, u8 len, u16 *buf)

{

	int ret, i;

	int len_words = len / sizeof(u16);

	__be16 be_buf[MMA9551_MAX_MAILBOX_DATA_REGS];



	ret = mma9551_transfer(client, app_id, MMA9551_CMD_READ_STATUS,

			       reg, NULL, 0, (u8 *) be_buf, len);

	if (ret < 0)

		return ret;



	for (i = 0; i < len_words; i++)

		buf[i] = be16_to_cpu(be_buf[i]);



	return 0;

}

EXPORT_SYMBOL(mma9551_read_status_words);



/**

 * mma9551_write_config_words() - write multiple config words

 * @client:	I2C client

 * @app_id:	Application ID

 * @reg:	Application register

 * @len:	Length of array to write in bytes

 * @val:	Array of words to write

 *

 * Write multiple configuration registers (word-sized registers).

 *

 * Locking note: This function must be called with the device lock held.

 * Locking is not handled inside the function. Callers should ensure they

 * serialize access to the HW.

 *

 * Returns: 0 on success, negative value on failure.

 */

int mma9551_write_config_words(struct i2c_client *client, u8 app_id,

			       u16 reg, u8 len, u16 *buf)

{

	int i;

	int len_words = len / sizeof(u16);

	__be16 be_buf[MMA9551_MAX_MAILBOX_DATA_REGS];



	for (i = 0; i < len_words; i++)

		be_buf[i] = cpu_to_be16(buf[i]);



	return mma9551_transfer(client, app_id, MMA9551_CMD_WRITE_CONFIG,

				reg, (u8 *) be_buf, len, NULL, 0);

}

EXPORT_SYMBOL(mma9551_write_config_words);



/**

 * mma9551_update_config_bits() - update bits in register

 * @client:	I2C client
@@ -609,6 +773,25 @@ int mma9551_read_accel_scale(int *val, int *val2) 
}

EXPORT_SYMBOL(mma9551_read_accel_scale);



/**

 * mma9551_app_reset() - reset application

 * @client:	I2C client

 * @app_mask:	Application to reset

 *

 * Reset the given application (using the Reset/Suspend/Clear

 * Control Application)

 *

 * Returns: 0 on success, negative value on failure.

 */

int mma9551_app_reset(struct i2c_client *client, u32 app_mask)

{

	return mma9551_write_config_byte(client, MMA9551_APPID_RCS,

					 MMA9551_RSC_RESET +

					 MMA9551_RSC_OFFSET(app_mask),

					 MMA9551_RSC_VAL(app_mask));

}

EXPORT_SYMBOL(mma9551_app_reset);



MODULE_AUTHOR("Irina Tirdea <irina.tirdea@intel.com>");

MODULE_AUTHOR("Vlad Dogaru <vlad.dogaru@intel.com>");

MODULE_LICENSE("GPL v2");

drivers/iio/accel/mma9551_core.h

+16 −1
Original line number Diff line number Diff line
@@ -21,9 +21,13 @@ 
#define MMA9551_APPID_AFE		0x06

#define MMA9551_APPID_TILT		0x0B

#define MMA9551_APPID_SLEEP_WAKE	0x12

#define MMA9551_APPID_RESET		0x17

#define MMA9551_APPID_PEDOMETER	        0x15

#define MMA9551_APPID_RCS		0x17

#define MMA9551_APPID_NONE		0xff



/* Reset/Suspend/Clear application app masks */

#define MMA9551_RSC_PED			BIT(21)



#define MMA9551_AUTO_SUSPEND_DELAY_MS	2000



enum mma9551_gpio_pin {
@@ -48,8 +52,18 @@ int mma9551_write_config_byte(struct i2c_client *client, u8 app_id, 
			      u16 reg, u8 val);

int mma9551_read_status_byte(struct i2c_client *client, u8 app_id,

			     u16 reg, u8 *val);

int mma9551_read_config_word(struct i2c_client *client, u8 app_id,

			    u16 reg, u16 *val);

int mma9551_write_config_word(struct i2c_client *client, u8 app_id,

			     u16 reg, u16 val);

int mma9551_read_status_word(struct i2c_client *client, u8 app_id,

			     u16 reg, u16 *val);

int mma9551_read_config_words(struct i2c_client *client, u8 app_id,

			     u16 reg, u8 len, u16 *buf);

int mma9551_read_status_words(struct i2c_client *client, u8 app_id,

			      u16 reg, u8 len, u16 *buf);

int mma9551_write_config_words(struct i2c_client *client, u8 app_id,

			       u16 reg, u8 len, u16 *buf);

int mma9551_update_config_bits(struct i2c_client *client, u8 app_id,

			       u16 reg, u8 mask, u8 val);

int mma9551_gpio_config(struct i2c_client *client, enum mma9551_gpio_pin pin,
@@ -62,5 +76,6 @@ int mma9551_read_accel_chan(struct i2c_client *client, 
			    const struct iio_chan_spec *chan,

			    int *val, int *val2);

int mma9551_read_accel_scale(int *val, int *val2);

int mma9551_app_reset(struct i2c_client *client, u32 app_mask);



#endif /* _MMA9551_CORE_H_ */

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