linux-imx

/*

 *  leds-blinkm.c

 *  (c) Jan-Simon Möller (dl9pf@gmx.de)

 *

 *  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., 675 Mass Ave, Cambridge, MA 02139, USA.

 */

​

#include <linux/module.h>

#include <linux/slab.h>

#include <linux/jiffies.h>

#include <linux/i2c.h>

#include <linux/err.h>

#include <linux/mutex.h>

#include <linux/sysfs.h>

#include <linux/printk.h>

#include <linux/pm_runtime.h>

#include <linux/leds.h>

#include <linux/delay.h>

​

/* Addresses to scan - BlinkM is on 0x09 by default*/

static const unsigned short normal_i2c[] = { 0x09, I2C_CLIENT_END };

​

static int blinkm_transfer_hw(struct i2c_client *client, int cmd);

static int blinkm_test_run(struct i2c_client *client);

​

struct blinkm_led {

    struct i2c_client *i2c_client;

    struct led_classdev led_cdev;

    int id;

};

​

#define cdev_to_blmled(c)          container_of(c, struct blinkm_led, led_cdev)

​

struct blinkm_data {

    struct i2c_client *i2c_client;

    struct mutex update_lock;

    /* used for led class interface */

    struct blinkm_led blinkm_leds[3];

    /* used for "blinkm" sysfs interface */

    u8 red;         /* color red */

    u8 green;       /* color green */

    u8 blue;        /* color blue */

    /* next values to use for transfer */

    u8 next_red;            /* color red */

    u8 next_green;      /* color green */

    u8 next_blue;       /* color blue */

    /* internal use */

    u8 args[7];     /* set of args for transmission */

    u8 i2c_addr;        /* i2c addr */

    u8 fw_ver;      /* firmware version */

    /* used, but not from userspace */

    u8 hue;         /* HSB  hue */

    u8 saturation;      /* HSB  saturation */

    u8 brightness;      /* HSB  brightness */

    u8 next_hue;            /* HSB  hue */

    u8 next_saturation;     /* HSB  saturation */

    u8 next_brightness;     /* HSB  brightness */

    /* currently unused / todo */

    u8 fade_speed;      /* fade speed     1 - 255 */

    s8 time_adjust;     /* time adjust -128 - 127 */

    u8 fade:1;      /* fade on = 1, off = 0 */

    u8 rand:1;      /* rand fade mode on = 1 */

    u8 script_id;       /* script ID */

    u8 script_repeats;  /* repeats of script */

    u8 script_startline;    /* line to start */

};

​

/* Colors */

#define RED   0

#define GREEN 1

#define BLUE  2

​

/* mapping command names to cmd chars - see datasheet */

#define BLM_GO_RGB            0

#define BLM_FADE_RGB          1

#define BLM_FADE_HSB          2

#define BLM_FADE_RAND_RGB     3

#define BLM_FADE_RAND_HSB     4

#define BLM_PLAY_SCRIPT       5

#define BLM_STOP_SCRIPT       6