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530 lines
14 KiB
Diff
530 lines
14 KiB
Diff
--- a/drivers/leds/Kconfig
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+++ b/drivers/leds/Kconfig
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@@ -487,6 +487,15 @@ config LEDS_BLINKM
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This option enables support for the BlinkM RGB LED connected
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through I2C. Say Y to enable support for the BlinkM LED.
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+config LEDS_TLC59116
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+ tristate "LED driver for TLC59116F dimmer"
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+ depends on LEDS_CLASS
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+ depends on I2C
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+ help
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+ This option enables support for Texas Instruments TLC59116F
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+ LED controller. It is generally only useful
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+ as a platform driver
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+
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comment "LED Triggers"
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source "drivers/leds/trigger/Kconfig"
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--- a/drivers/leds/Makefile
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+++ b/drivers/leds/Makefile
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@@ -54,6 +54,7 @@ obj-$(CONFIG_LEDS_ASIC3) += leds-asic3.
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obj-$(CONFIG_LEDS_MAX8997) += leds-max8997.o
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obj-$(CONFIG_LEDS_LM355x) += leds-lm355x.o
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obj-$(CONFIG_LEDS_BLINKM) += leds-blinkm.o
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+obj-$(CONFIG_LEDS_TLC59116) += leds-tlc59116.o
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# LED SPI Drivers
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obj-$(CONFIG_LEDS_DAC124S085) += leds-dac124s085.o
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--- /dev/null
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+++ b/drivers/leds/leds-tlc59116.c
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@@ -0,0 +1,498 @@
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+/*
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+ * Copyright 2014 Belkin Inc.
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+ *
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+ * Author: Belkin Inc.
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+ *
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+ * This file is subject to the terms and conditions of version 2 of
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+ * the GNU General Public License. See the file COPYING in the main
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+ * directory of this archive for more details.
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+ *
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+ * LED driver for various TLC59116 I2C LED drivers
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/delay.h>
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+#include <linux/string.h>
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+#include <linux/ctype.h>
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+#include <linux/leds.h>
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+#include <linux/err.h>
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+#include <linux/i2c.h>
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+#include <linux/workqueue.h>
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+
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+/* LED select registers determine the source that drives LED outputs */
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+#define TLC59116_LED_OFF 0x0 /* Output LOW */
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+#define TLC59116_LED_ON 0x1 /* Output HI-Z */
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+#define TLC59116_DIM 0x2 /* Dimming */
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+#define TLC59116_BLINK 0x3 /* Blinking */
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+
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+#define TLC59116_PINS 16
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+#define TLC59116_REG_MODE1 0x00 /* Mode register 0 */
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+#define MODE1_RESPON_ADDR_MASK 0xF0
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+#define MODE1_NORMAL_MODE (0 << 4)
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+#define MODE1_SPEED_MODE (1 << 4)
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+
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+#define TLC59116_REG_MODE2 0x01 /* Mode register 1 */
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+#define MODE2_DIM (0 << 5)
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+#define MODE2_BLINK (1 << 5)
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+#define MODE2_OCH_STOP (0 << 3)
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+#define MODE2_OCH_ACK (1 << 3)
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+
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+#define TLC59116_REG_PWM0 0x02
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+#define TLC59116_REG_PWM1 0x03
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+#define TLC59116_REG_PWM2 0x04
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+#define TLC59116_REG_PWM3 0x05
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+#define TLC59116_REG_PWM4 0x06
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+#define TLC59116_REG_PWM5 0x07
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+#define TLC59116_REG_PWM6 0x08
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+#define TLC59116_REG_PWM7 0x09
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+#define TLC59116_REG_PWM8 0x0a
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+#define TLC59116_REG_PWM9 0x0b
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+#define TLC59116_REG_PWM10 0x0c
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+#define TLC59116_REG_PWM11 0x0d
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+#define TLC59116_REG_PWM12 0x0e
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+#define TLC59116_REG_PWM13 0x0f
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+#define TLC59116_REG_PWM14 0x10
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+#define TLC59116_REG_PWM15 0x01
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+
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+#define TLC59116_REG_GRPPWM 0x12
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+#define TLC59116_REG_GRPFREQ 0x13
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+
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+#define TLC59116_PERIOD_MIN 41 /* 41ms */
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+#define TLC59116_PERIOD_MAX 10730 /* 10.73s */
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+
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+#define TLC59116_REG_LEDOUT0 0x14 /* LED [3:0] driver output state registers */
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+#define TLC59116_REG_LEDOUT1 0x15 /* LED [7:4] driver output state registers */
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+#define TLC59116_REG_LEDOUT2 0x16 /* LED [11:8] driver output state registers */
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+#define TLC59116_REG_LEDOUT3 0x17 /* LED [15:12] driver output state registers */
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+
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+#define GPIO0_MASK 0x3
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+
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+#define DEBUG 0
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+
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+#if DEBUG > 1
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+#define led_dbg(fmt, arg...) printk(KERN_DEBUG "tlc59116:%s " fmt "\n", __func__ , ## arg)
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+#else
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+#define led_dbg(fmt, arg...)
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+#endif
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+
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+
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+#if DEBUG > 0
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+#define led_info(fmt, arg...) printk("tlc59116:%s " fmt "\n", __func__ , ## arg)
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+#else
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+#define led_info(fmt, arg...)
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+#endif
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+
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+enum tlc59116_type {
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+ tlc59116,
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+};
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+
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+struct tlc59116_chipdef {
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+ int bits;
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+ u8 slv_addr; /* 7-bit slave address mask */
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+ int slv_addr_shift; /* Number of bits to ignore */
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+};
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+
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+static struct tlc59116_chipdef tlc59116_chipdefs[] = {
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+ [tlc59116] = {
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+ .bits = 16,
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+ .slv_addr = /* 1100xxx */ 0x68,
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+ .slv_addr_shift = 3,
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+ },
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+};
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+
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+static const struct i2c_device_id tlc59116_id[] = {
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+ { "tlc59116", tlc59116 },
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+ { }
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+};
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+MODULE_DEVICE_TABLE(i2c, tlc59116_id);
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+
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+struct tlc59116_led {
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+ struct tlc59116_chipdef *chipdef;
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+ struct i2c_client *client;
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+ struct work_struct work;
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+ spinlock_t lock;
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+ enum led_brightness brightness;
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+ struct led_classdev led_cdev;
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+ int led_num; /* 0 .. 8 potentially */
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+ char name[32];
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+};
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+
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+//#define DUMP_REGS
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+
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+#ifdef DUMP_REGS
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+void dump_regs(struct i2c_client *client)
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+{
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+ int i, j = 0;
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+ u8 data;
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+ printk ("\n-------------------------------------\n");
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+ for (i = 0; i< 0x20; i++)
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+ {
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+ data = i2c_smbus_read_byte_data(client, i);
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+ printk ("[0x%x] = 0x%x ",i, data);
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+ j++;
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+ if (j == 5)
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+ {
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+ printk ("\n");
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+ j = 0;
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+ }
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+ }
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+ printk ("\n");
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+}
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+#endif
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+
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+static int tlc59116_set_mode(struct i2c_client *client, uint8_t mode)
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+{
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+ uint8_t val = 0;
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+
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+ if ((mode != MODE2_DIM) && (mode != MODE2_BLINK))
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+ mode = MODE2_DIM;
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+
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+ /* Configure MODE1 register */
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+ val &= 0x0;
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+ val &= MODE1_RESPON_ADDR_MASK;
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+ val |= MODE1_NORMAL_MODE;
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+ i2c_smbus_write_byte_data(client, TLC59116_REG_MODE1, val);
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+
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+ /* Configure MODE2 Reg */
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+ val &= 0x00;
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+ val |= MODE2_OCH_STOP;
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+
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+ val |= mode;
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+
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+ i2c_smbus_write_byte_data(client, TLC59116_REG_MODE2, val);
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+ mdelay(100);
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+
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+ return 0;
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+}
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+
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+static int tlc59116_set_gpio_act(struct i2c_client *client, u8 gpio_no, u8 act_mode)
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+{
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+ char data, addr = 0, i;
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+
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+ if ((gpio_no >= 0) && (gpio_no < 4))
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+ addr = TLC59116_REG_LEDOUT0;
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+ else if ((gpio_no >= 4) && (gpio_no < 8))
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+ addr = TLC59116_REG_LEDOUT1;
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+ else if ((gpio_no >= 8) && (gpio_no < 12))
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+ addr = TLC59116_REG_LEDOUT2;
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+ else if ((gpio_no >=12 ) && (gpio_no < 16))
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+ addr = TLC59116_REG_LEDOUT3;
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+
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+ data = i2c_smbus_read_byte_data(client, addr);
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+
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+ i = (gpio_no % 4) * 2;
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+
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+ data &= ~(GPIO0_MASK << i);
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+ act_mode = act_mode << i;
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+ data |= act_mode;
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+
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+ if(i2c_smbus_write_byte_data(client, addr, data) != 0) {
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+ return -1;
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+ }
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+ return 0;
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+}
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+
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+static int tlc59116_set_gpio(struct i2c_client *client, uint8_t gpio_no, uint8_t val)
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+{
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+ val &= 0x03;
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+ tlc59116_set_gpio_act(client, gpio_no, val);
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+#ifdef DUMP_REGS
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+ dump_regs(client);
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+#endif
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+ return 0;
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+}
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+
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+static int tlc59116_get_gpio(struct i2c_client *client, uint8_t gpio_no)
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+{
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+ uint8_t val, reg, data;
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+
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+ led_dbg("gpio = %d\n", gpio_no);
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+ reg = TLC59116_REG_LEDOUT0;
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+
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+ if ((gpio_no >= 0) && (gpio_no < 4))
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+ reg = TLC59116_REG_LEDOUT0;
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+ else if ((gpio_no >= 4) && (gpio_no < 8)) {
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+ reg = TLC59116_REG_LEDOUT1;
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+ gpio_no = gpio_no - 4;
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+ }
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+ else if ((gpio_no >= 8) && (gpio_no < 12)) {
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+ reg = TLC59116_REG_LEDOUT2;
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+ gpio_no = gpio_no - 8;
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+ }
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+ else if ((gpio_no >=12 ) && (gpio_no < 16)) {
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+ reg = TLC59116_REG_LEDOUT3;
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+ gpio_no = gpio_no - 12;
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+ }
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+
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+ val = i2c_smbus_read_byte_data(client, reg);
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+
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+ data = (val >> (gpio_no * 2)) & 0x03;
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+ return data;
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+}
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+
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+/*
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+ * gpio_no [0..7]
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+ * duty_cycle [0..99]%
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+ *
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+ * */
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+static int tlc59116_individual_brighness_control(struct i2c_client *client, uint8_t gpio_no, uint8_t brightness)
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+{
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+ uint8_t pwm;
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+
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+ pwm = gpio_no + TLC59116_REG_PWM0;
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+ i2c_smbus_write_byte_data(client, pwm, brightness);
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+
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+ return 0;
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+}
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+
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+static void tlc59116_led_work(struct work_struct *work)
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+{
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+ struct tlc59116_led *tlc59116;
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+
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+ tlc59116 = container_of(work, struct tlc59116_led, work);
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+
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+ led_dbg("\nbrighness = %d \n", tlc59116->brightness);
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+ switch (tlc59116->brightness) {
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+ case LED_OFF:
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+ led_info("\nLed off\n");
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+ tlc59116_set_gpio(tlc59116->client, tlc59116->led_num, TLC59116_LED_OFF);
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+ break;
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+
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+ case LED_FULL:
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+ led_info("\nLed on\n");
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+ tlc59116_set_gpio(tlc59116->client, tlc59116->led_num, TLC59116_LED_ON);
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+ break;
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+ default:
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+ led_info("\nBrightness is %d\n", tlc59116->brightness);
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+ if (TLC59116_BLINK != tlc59116_get_gpio(tlc59116->client, tlc59116->led_num))
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+ tlc59116_set_gpio(tlc59116->client, tlc59116->led_num, TLC59116_DIM);
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+
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+ tlc59116_individual_brighness_control(tlc59116->client, tlc59116->led_num, tlc59116->brightness);
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+ break;
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+ }
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+
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+}
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+
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+static void tlc59116_led_set(struct led_classdev *led_cdev, enum led_brightness value)
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+{
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+ struct tlc59116_led *tlc59116;
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+
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+ tlc59116 = container_of(led_cdev, struct tlc59116_led, led_cdev);
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+
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+ spin_lock(&tlc59116->lock);
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+ tlc59116->brightness = value;
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+
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+ /*
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+ * Must use workqueue for the actual I/O since I2C operations
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+ * can sleep.
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+ */
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+ schedule_work(&tlc59116->work);
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+
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+ spin_unlock(&tlc59116->lock);
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+}
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+
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+/*
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+ * delay_on, delay_off: units are in ms
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+ *
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+ */
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+
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+static int tlc59116_set_blink(struct led_classdev *led_cdev,
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+ unsigned long *delay_on,
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+ unsigned long *delay_off)
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+{
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+ struct tlc59116_led *tlc59116;
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+ uint16_t period;
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+ uint16_t duty_cycle;
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+ uint8_t gdc;
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+ uint8_t gfrq;
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+
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+ tlc59116 = container_of(led_cdev, struct tlc59116_led, led_cdev);
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+ led_info ("Blinking: delay_on = %ldms, delay_off = %ldms, brightness = %d\n",
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+ *delay_on, *delay_off, tlc59116->brightness);
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+
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+ // Hardware blinking only for tricolor leds . The rest will have software blinking
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+ if (tlc59116->led_num > 2)
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+ return 1;
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+
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+ if ((*delay_on == 0) && (*delay_off ==0)) {
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+ spin_lock(&tlc59116->lock);
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+
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+ /* MODE2[DMBLNK] = 1 */
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+ tlc59116_set_mode(tlc59116->client, MODE2_BLINK);
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+
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+ /* Set LDRx = 11 */
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+ tlc59116_set_gpio(tlc59116->client, tlc59116->led_num, TLC59116_BLINK);
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+
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+ tlc59116_individual_brighness_control(tlc59116->client, tlc59116->led_num, tlc59116->brightness);
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+ spin_unlock(&tlc59116->lock);
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+ return 0;
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+ }
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+
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+
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+ if ((*delay_on + *delay_off) > TLC59116_PERIOD_MAX)
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+ {
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+ led_dbg ("Max period is %dms\n", TLC59116_PERIOD_MAX);
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+ return -EINVAL;
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+ }
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+
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+ if ((*delay_on + *delay_off) < TLC59116_PERIOD_MIN)
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+ {
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+ *delay_on = TLC59116_PERIOD_MIN/2 + 1;
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+ *delay_off = TLC59116_PERIOD_MIN/2 + 1;
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+ }
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+ period = (*delay_on) + (*delay_off);
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+
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+ duty_cycle = (100 * (*delay_on)) / period;
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+
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+ spin_lock(&tlc59116->lock);
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+
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+ /* MODE2[DMBLNK] = 1 */
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+ tlc59116_set_mode(tlc59116->client, MODE2_BLINK);
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+
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+ /* Set LDRx = 11 */
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+ tlc59116_set_gpio(tlc59116->client, tlc59116->led_num, TLC59116_BLINK);
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+
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+ tlc59116_individual_brighness_control(tlc59116->client, tlc59116->led_num, tlc59116->brightness);
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+
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+ gdc = (duty_cycle * 256)/100;
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+ i2c_smbus_write_byte_data(tlc59116->client, TLC59116_REG_GRPPWM, gdc);
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+
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+ gfrq = (24 * period)/1000 - 1; /* unit is in second (convert from ms to second) */
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+ i2c_smbus_write_byte_data(tlc59116->client, TLC59116_REG_GRPFREQ, gfrq);
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+
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+
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+#ifdef DUMP_REGS
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+ dump_regs(tlc59116->client);
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+#endif
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+
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+ spin_unlock(&tlc59116->lock);
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+ return 0;
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+}
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+
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+static int tlc59116_probe(struct i2c_client *client,
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+ const struct i2c_device_id *id)
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+{
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+ struct tlc59116_led *tlc59116;
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+ struct tlc59116_chipdef *chip;
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+ struct i2c_adapter *adapter;
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+ struct led_platform_data *pdata;
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+ int i, err;
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+
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+ chip = &tlc59116_chipdefs[id->driver_data];
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+ adapter = to_i2c_adapter(client->dev.parent);
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+ pdata = client->dev.platform_data;
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+
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+ /* Make sure the slave address / chip type combo given is possible */
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+ if ((client->addr & ~((1 << chip->slv_addr_shift) - 1)) !=
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+ chip->slv_addr) {
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+ dev_err(&client->dev, "invalid slave address %02x\n",
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+ client->addr);
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+ return -ENODEV;
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+ }
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+
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+ printk(KERN_INFO "leds-tlc59116: Using %s %d-bit LED driver at "
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+ "slave address 0x%02x\n",
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+ id->name, chip->bits, client->addr);
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+
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+ if (!i2c_check_functionality(adapter, I2C_FUNC_I2C))
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+ return -EIO;
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+
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+ if (pdata) {
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+ if (pdata->num_leds != chip->bits) {
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+ dev_err(&client->dev, "board info claims %d LEDs"
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+ " on a %d-bit chip\n",
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+ pdata->num_leds, chip->bits);
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+ return -ENODEV;
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+ }
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+ }
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+
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+ tlc59116 = devm_kzalloc(&client->dev, sizeof(*tlc59116) * chip->bits, GFP_KERNEL);
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+ if (!tlc59116)
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+ return -ENOMEM;
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+
|
|
+ i2c_set_clientdata(client, tlc59116);
|
|
+
|
|
+ for (i = 0; i < chip->bits; i++) {
|
|
+ tlc59116[i].chipdef = chip;
|
|
+ tlc59116[i].client = client;
|
|
+ tlc59116[i].led_num = i;
|
|
+
|
|
+ /* Platform data can specify LED names and default triggers */
|
|
+ if (pdata) {
|
|
+ if (pdata->leds[i].name)
|
|
+ snprintf(tlc59116[i].name,
|
|
+ sizeof(tlc59116[i].name), "tlc59116:%s",
|
|
+ pdata->leds[i].name);
|
|
+ if (pdata->leds[i].default_trigger)
|
|
+ tlc59116[i].led_cdev.default_trigger =
|
|
+ pdata->leds[i].default_trigger;
|
|
+ } else {
|
|
+ snprintf(tlc59116[i].name, sizeof(tlc59116[i].name),
|
|
+ "tlc59116:%d", i);
|
|
+ }
|
|
+
|
|
+ spin_lock_init(&tlc59116[i].lock);
|
|
+
|
|
+ tlc59116[i].led_cdev.name = tlc59116[i].name;
|
|
+ tlc59116[i].led_cdev.brightness_set = tlc59116_led_set;
|
|
+ tlc59116[i].led_cdev.blink_set = tlc59116_set_blink;
|
|
+ tlc59116[i].led_cdev.brightness = 0;
|
|
+
|
|
+ INIT_WORK(&tlc59116[i].work, tlc59116_led_work);
|
|
+
|
|
+ err = led_classdev_register(&client->dev, &tlc59116[i].led_cdev);
|
|
+ if (err < 0)
|
|
+ goto exit;
|
|
+ }
|
|
+
|
|
+ tlc59116_set_mode(client, MODE2_DIM);
|
|
+
|
|
+ /* Turn off LEDs */
|
|
+ for (i = 0; i < chip->bits; i++)
|
|
+ tlc59116_set_gpio(client, i, TLC59116_LED_OFF);
|
|
+
|
|
+ return 0;
|
|
+
|
|
+exit:
|
|
+ while (i--) {
|
|
+ led_classdev_unregister(&tlc59116[i].led_cdev);
|
|
+ cancel_work_sync(&tlc59116[i].work);
|
|
+ }
|
|
+
|
|
+ devm_kfree(&client->dev, tlc59116);
|
|
+ i2c_set_clientdata(client, NULL);
|
|
+
|
|
+ return err;
|
|
+}
|
|
+
|
|
+static int tlc59116_remove(struct i2c_client *client)
|
|
+{
|
|
+ struct tlc59116_led *tlc59116 = i2c_get_clientdata(client);
|
|
+ int i;
|
|
+
|
|
+ for (i = 0; i < tlc59116->chipdef->bits; i++) {
|
|
+ led_classdev_unregister(&tlc59116[i].led_cdev);
|
|
+ cancel_work_sync(&tlc59116[i].work);
|
|
+ }
|
|
+
|
|
+ devm_kfree(&client->dev, tlc59116);
|
|
+ i2c_set_clientdata(client, NULL);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static struct i2c_driver tlc59116_driver = {
|
|
+ .driver = {
|
|
+ .name = "leds-tlc59116",
|
|
+ .owner = THIS_MODULE,
|
|
+ },
|
|
+ .probe = tlc59116_probe,
|
|
+ .remove = tlc59116_remove,
|
|
+ .id_table = tlc59116_id,
|
|
+};
|
|
+
|
|
+module_i2c_driver(tlc59116_driver);
|
|
+
|
|
+MODULE_AUTHOR("Belkin Inc.");
|
|
+MODULE_DESCRIPTION("TLC59116 LED driver");
|
|
+MODULE_LICENSE("GPL v2");
|