449 lines
12 KiB
C
449 lines
12 KiB
C
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/*
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* A LED driver for the accton_as7116_54x_led
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*
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* Copyright (C) 2014 Accton Technology Corporation.
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* Brandon Chuang <brandon_chuang@accton.com.tw>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/err.h>
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#include <linux/leds.h>
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#include <linux/slab.h>
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#define DRVNAME "as7116_54x_fan"
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#define DEBUG_MODE 0
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#if (DEBUG_MODE == 1)
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#define DEBUG_PRINT(fmt, args...) \
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printk (KERN_INFO "%s:%s[%d]: " fmt "\r\n", __FILE__, __FUNCTION__, __LINE__, ##args)
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#else
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#define DEBUG_PRINT(fmt, args...)
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#endif
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extern int as7116_54x_cpld_read(unsigned short cpld_addr, u8 reg);
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extern int as7116_54x_cpld_write(unsigned short cpld_addr, u8 reg, u8 value);
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struct as7116_54x_led_data {
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struct platform_device *pdev;
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struct mutex update_lock;
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char valid; /* != 0 if registers are valid */
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unsigned long last_updated; /* In jiffies */
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u8 reg_val[1]; /* LOC/DIAG LED */
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};
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static struct as7116_54x_led_data *ledctl = NULL;
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/* LED related data
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*/
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#define LED_CNTRLER_I2C_ADDRESS (0x60)
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#define LED_TYPE_DIAG_REG_MASK (0x0C)
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#define LED_MODE_DIAG_GREEN_VALUE (0x08)
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#define LED_MODE_DIAG_AMBER_VALUE (0x04)
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#define LED_MODE_DIAG_YELLOW_VALUE (0x00)
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#define LED_MODE_DIAG_OFF_VALUE (0x0C)
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#define LED_TYPE_FAN_REG_MASK (0x03)
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#define LED_MODE_FAN_GREEN_VALUE (0x02)
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#define LED_MODE_FAN_AMBER_VALUE (0x01)
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#define LED_MODE_FAN_OFF_VALUE (0x03)
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#define LED_MODE_FAN_AUTO_VALUE (0x00)
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#define LED_TYPE_PSU1_REG_MASK (0x03)
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#define LED_MODE_PSU1_GREEN_VALUE (0x02)
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#define LED_MODE_PSU1_AMBER_VALUE (0x01)
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#define LED_MODE_PSU1_OFF_VALUE (0x03)
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#define LED_MODE_PSU1_AUTO_VALUE (0x00)
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#define LED_TYPE_PSU2_REG_MASK (0x0C)
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#define LED_MODE_PSU2_GREEN_VALUE (0x08)
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#define LED_MODE_PSU2_AMBER_VALUE (0x04)
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#define LED_MODE_PSU2_OFF_VALUE (0x0C)
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#define LED_MODE_PSU2_AUTO_VALUE (0x00)
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#define LED_TYPE_LOC_REG_MASK (0x30)
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#define LED_MODE_LOC_AMBER_VALUE (0x00)
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#define LED_MODE_LOC_AMBER_BLINKING_VALUE1 (0x20)
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#define LED_MODE_LOC_AMBER_BLINKING_VALUE2 (0x30)
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#define LED_MODE_LOC_OFF_VALUE (0x10)
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static const u8 led_reg[] = {
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0x0A, /* LOC/DIAG/FAN LED */
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0x0B, /* PSU1/PSU2 LED */
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};
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enum led_type {
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LED_TYPE_DIAG,
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LED_TYPE_LOC,
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LED_TYPE_FAN,
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LED_TYPE_PSU1,
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LED_TYPE_PSU2
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};
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enum led_light_mode {
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LED_MODE_OFF = 0,
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LED_MODE_GREEN,
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LED_MODE_GREEN_BLINK,
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LED_MODE_AMBER,
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LED_MODE_AMBER_BLINK,
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LED_MODE_YELLOW,
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LED_MODE_YELLOW_BLINK,
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LED_MODE_BLUE,
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LED_MODE_BLUE_BLINK,
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LED_MODE_AUTO,
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LED_MODE_UNKNOWN
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};
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struct led_type_mode {
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enum led_type type;
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enum led_light_mode mode;
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int type_mask;
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int mode_value;
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};
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static struct led_type_mode led_type_mode_data[] = {
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{LED_TYPE_FAN, LED_MODE_OFF, LED_TYPE_FAN_REG_MASK, LED_MODE_FAN_OFF_VALUE},
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{LED_TYPE_FAN, LED_MODE_GREEN, LED_TYPE_FAN_REG_MASK, LED_MODE_FAN_GREEN_VALUE},
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{LED_TYPE_FAN, LED_MODE_AMBER, LED_TYPE_FAN_REG_MASK, LED_MODE_FAN_AMBER_VALUE},
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{LED_TYPE_FAN, LED_MODE_AUTO, LED_TYPE_FAN_REG_MASK, LED_MODE_FAN_AUTO_VALUE},
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{LED_TYPE_PSU1, LED_MODE_OFF, LED_TYPE_PSU1_REG_MASK, LED_MODE_PSU1_OFF_VALUE},
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{LED_TYPE_PSU1, LED_MODE_GREEN, LED_TYPE_PSU1_REG_MASK, LED_MODE_PSU1_GREEN_VALUE},
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{LED_TYPE_PSU1, LED_MODE_AMBER, LED_TYPE_PSU1_REG_MASK, LED_MODE_PSU1_AMBER_VALUE},
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{LED_TYPE_PSU1, LED_MODE_AUTO, LED_TYPE_PSU1_REG_MASK, LED_MODE_PSU1_AUTO_VALUE},
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{LED_TYPE_PSU2, LED_MODE_OFF, LED_TYPE_PSU2_REG_MASK, LED_MODE_PSU2_OFF_VALUE},
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{LED_TYPE_PSU2, LED_MODE_GREEN, LED_TYPE_PSU2_REG_MASK, LED_MODE_PSU2_GREEN_VALUE},
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{LED_TYPE_PSU2, LED_MODE_AMBER, LED_TYPE_PSU2_REG_MASK, LED_MODE_PSU2_AMBER_VALUE},
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{LED_TYPE_PSU2, LED_MODE_AUTO, LED_TYPE_PSU2_REG_MASK, LED_MODE_PSU2_AUTO_VALUE},
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{LED_TYPE_DIAG, LED_MODE_OFF, LED_TYPE_DIAG_REG_MASK, LED_MODE_DIAG_OFF_VALUE},
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{LED_TYPE_DIAG, LED_MODE_GREEN, LED_TYPE_DIAG_REG_MASK, LED_MODE_DIAG_GREEN_VALUE},
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{LED_TYPE_DIAG, LED_MODE_AMBER, LED_TYPE_DIAG_REG_MASK, LED_MODE_DIAG_AMBER_VALUE},
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{LED_TYPE_DIAG, LED_MODE_YELLOW, LED_TYPE_DIAG_REG_MASK, LED_MODE_DIAG_YELLOW_VALUE},
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{LED_TYPE_LOC, LED_MODE_OFF, LED_TYPE_LOC_REG_MASK, LED_MODE_LOC_OFF_VALUE},
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{LED_TYPE_LOC, LED_MODE_AMBER, LED_TYPE_LOC_REG_MASK, LED_MODE_LOC_AMBER_VALUE},
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{LED_TYPE_LOC, LED_MODE_AMBER_BLINK, LED_TYPE_LOC_REG_MASK, LED_MODE_LOC_AMBER_BLINKING_VALUE1},
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{LED_TYPE_LOC, LED_MODE_AMBER_BLINK, LED_TYPE_LOC_REG_MASK, LED_MODE_LOC_AMBER_BLINKING_VALUE2}
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};
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static int led_reg_val_to_light_mode(enum led_type type, u8 reg_val) {
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int i;
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for (i = 0; i < ARRAY_SIZE(led_type_mode_data); i++) {
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if (type != led_type_mode_data[i].type) {
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continue;
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}
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if ((led_type_mode_data[i].type_mask & reg_val) ==
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led_type_mode_data[i].mode_value) {
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return led_type_mode_data[i].mode;
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}
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}
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return LED_MODE_UNKNOWN;
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}
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static u8 led_light_mode_to_reg_val(enum led_type type,
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enum led_light_mode mode, u8 reg_val) {
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int i;
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for (i = 0; i < ARRAY_SIZE(led_type_mode_data); i++) {
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int type_mask, mode_value;
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if (type != led_type_mode_data[i].type)
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continue;
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if (mode != led_type_mode_data[i].mode)
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continue;
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type_mask = led_type_mode_data[i].type_mask;
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mode_value = led_type_mode_data[i].mode_value;
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reg_val = (reg_val & ~type_mask) | mode_value;
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}
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return reg_val;
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}
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static int as7116_54x_led_read_value(u8 reg)
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{
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return as7116_54x_cpld_read(LED_CNTRLER_I2C_ADDRESS, reg);
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}
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static int as7116_54x_led_write_value(u8 reg, u8 value)
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{
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return as7116_54x_cpld_write(LED_CNTRLER_I2C_ADDRESS, reg, value);
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}
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static void as7116_54x_led_update(void)
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{
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mutex_lock(&ledctl->update_lock);
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if (time_after(jiffies, ledctl->last_updated + HZ + HZ / 2)
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|| !ledctl->valid) {
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int i;
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dev_dbg(&ledctl->pdev->dev, "Starting accton_as7116_54x_led update\n");
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ledctl->valid = 0;
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/* Update LED data
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*/
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for (i = 0; i < ARRAY_SIZE(ledctl->reg_val); i++) {
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int status = as7116_54x_led_read_value(led_reg[i]);
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if (status < 0) {
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dev_dbg(&ledctl->pdev->dev, "reg %d, err %d\n", led_reg[i], status);
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goto exit;
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}
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else {
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ledctl->reg_val[i] = status;
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}
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}
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ledctl->last_updated = jiffies;
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ledctl->valid = 1;
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}
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exit:
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mutex_unlock(&ledctl->update_lock);
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}
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static void as7116_54x_led_set(struct led_classdev *led_cdev,
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enum led_brightness led_light_mode,
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u8 reg, enum led_type type)
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{
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int reg_val;
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mutex_lock(&ledctl->update_lock);
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reg_val = as7116_54x_led_read_value(reg);
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if (reg_val < 0) {
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dev_dbg(&ledctl->pdev->dev, "reg %d, err %d\n", reg, reg_val);
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goto exit;
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}
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reg_val = led_light_mode_to_reg_val(type, led_light_mode, reg_val);
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as7116_54x_led_write_value(reg, reg_val);
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/* to prevent the slow-update issue */
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ledctl->valid = 0;
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exit:
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mutex_unlock(&ledctl->update_lock);
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}
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static void as7116_54x_led_diag_set(struct led_classdev *led_cdev,
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enum led_brightness led_light_mode)
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{
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as7116_54x_led_set(led_cdev, led_light_mode, led_reg[0], LED_TYPE_DIAG);
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}
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static enum led_brightness as7116_54x_led_diag_get(struct led_classdev *cdev)
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{
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as7116_54x_led_update();
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return led_reg_val_to_light_mode(LED_TYPE_DIAG, ledctl->reg_val[0]);
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}
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static void as7116_54x_led_loc_set(struct led_classdev *led_cdev,
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enum led_brightness led_light_mode)
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{
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as7116_54x_led_set(led_cdev, led_light_mode, led_reg[0], LED_TYPE_LOC);
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}
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static enum led_brightness as7116_54x_led_loc_get(struct led_classdev *cdev)
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{
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as7116_54x_led_update();
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return led_reg_val_to_light_mode(LED_TYPE_LOC, ledctl->reg_val[0]);
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}
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static void as7116_54x_led_fan_set(struct led_classdev *led_cdev,
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enum led_brightness led_light_mode)
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{
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as7116_54x_led_set(led_cdev, led_light_mode, led_reg[0], LED_TYPE_FAN);
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}
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static enum led_brightness as7116_54x_led_fan_get(struct led_classdev *cdev)
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{
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as7116_54x_led_update();
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return led_reg_val_to_light_mode(LED_TYPE_FAN, ledctl->reg_val[0]);
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}
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static void as7116_54x_led_psu1_set(struct led_classdev *led_cdev,
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enum led_brightness led_light_mode)
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{
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as7116_54x_led_set(led_cdev, led_light_mode, led_reg[1], LED_TYPE_PSU1);
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}
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static enum led_brightness as7116_54x_led_psu1_get(struct led_classdev *cdev)
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{
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as7116_54x_led_update();
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return led_reg_val_to_light_mode(LED_TYPE_PSU1, ledctl->reg_val[1]);
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}
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static void as7116_54x_led_psu2_set(struct led_classdev *led_cdev,
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enum led_brightness led_light_mode)
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{
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as7116_54x_led_set(led_cdev, led_light_mode, led_reg[1], LED_TYPE_PSU2);
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}
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static enum led_brightness as7116_54x_led_psu2_get(struct led_classdev *cdev)
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{
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as7116_54x_led_update();
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return led_reg_val_to_light_mode(LED_TYPE_PSU2, ledctl->reg_val[1]);
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}
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static struct led_classdev as7116_54x_leds[] = {
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[LED_TYPE_DIAG] = {
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.name = "as7116_54x_led::diag",
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.default_trigger = "unused",
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.brightness_set = as7116_54x_led_diag_set,
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.brightness_get = as7116_54x_led_diag_get,
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.max_brightness = LED_MODE_YELLOW,
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},
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[LED_TYPE_LOC] = {
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.name = "as7116_54x_led::loc",
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.default_trigger = "unused",
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.brightness_set = as7116_54x_led_loc_set,
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.brightness_get = as7116_54x_led_loc_get,
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.max_brightness = LED_MODE_AMBER_BLINK,
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||
|
|
},
|
||
|
|
[LED_TYPE_FAN] = {
|
||
|
|
.name = "as7116_54x_led::fan",
|
||
|
|
.default_trigger = "unused",
|
||
|
|
.brightness_set = as7116_54x_led_fan_set,
|
||
|
|
.brightness_get = as7116_54x_led_fan_get,
|
||
|
|
.max_brightness = LED_MODE_AUTO,
|
||
|
|
},
|
||
|
|
[LED_TYPE_PSU1] = {
|
||
|
|
.name = "as7116_54x_led::psu1",
|
||
|
|
.default_trigger = "unused",
|
||
|
|
.brightness_set = as7116_54x_led_psu1_set,
|
||
|
|
.brightness_get = as7116_54x_led_psu1_get,
|
||
|
|
.max_brightness = LED_MODE_AUTO,
|
||
|
|
},
|
||
|
|
[LED_TYPE_PSU2] = {
|
||
|
|
.name = "as7116_54x_led::psu2",
|
||
|
|
.default_trigger = "unused",
|
||
|
|
.brightness_set = as7116_54x_led_psu2_set,
|
||
|
|
.brightness_get = as7116_54x_led_psu2_get,
|
||
|
|
.max_brightness = LED_MODE_AUTO,
|
||
|
|
},
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
static int as7116_54x_led_probe(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
int ret, i;
|
||
|
|
|
||
|
|
for (i = 0; i < ARRAY_SIZE(as7116_54x_leds); i++) {
|
||
|
|
ret = led_classdev_register(&pdev->dev, &as7116_54x_leds[i]);
|
||
|
|
|
||
|
|
if (ret < 0) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Check if all LEDs were successfully registered */
|
||
|
|
if (i != ARRAY_SIZE(as7116_54x_leds)){
|
||
|
|
int j;
|
||
|
|
|
||
|
|
/* only unregister the LEDs that were successfully registered */
|
||
|
|
for (j = 0; j < i; j++) {
|
||
|
|
led_classdev_unregister(&as7116_54x_leds[i]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int as7116_54x_led_remove(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
|
||
|
|
for (i = 0; i < ARRAY_SIZE(as7116_54x_leds); i++) {
|
||
|
|
led_classdev_unregister(&as7116_54x_leds[i]);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct platform_driver as7116_54x_led_driver = {
|
||
|
|
.probe = as7116_54x_led_probe,
|
||
|
|
.remove = as7116_54x_led_remove,
|
||
|
|
.driver = {
|
||
|
|
.name = DRVNAME,
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
},
|
||
|
|
};
|
||
|
|
|
||
|
|
static int __init as7116_54x_led_init(void)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
#if 0
|
||
|
|
extern int platform_accton_as7116_54x(void);
|
||
|
|
if (!platform_accton_as7116_54x()) {
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
ret = platform_driver_register(&as7116_54x_led_driver);
|
||
|
|
if (ret < 0) {
|
||
|
|
goto exit;
|
||
|
|
}
|
||
|
|
|
||
|
|
ledctl = kzalloc(sizeof(struct as7116_54x_led_data), GFP_KERNEL);
|
||
|
|
if (!ledctl) {
|
||
|
|
ret = -ENOMEM;
|
||
|
|
goto exit_driver;
|
||
|
|
}
|
||
|
|
|
||
|
|
mutex_init(&ledctl->update_lock);
|
||
|
|
|
||
|
|
ledctl->pdev = platform_device_register_simple(DRVNAME, -1, NULL, 0);
|
||
|
|
if (IS_ERR(ledctl->pdev)) {
|
||
|
|
ret = PTR_ERR(ledctl->pdev);
|
||
|
|
goto exit_free;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
exit_free:
|
||
|
|
kfree(ledctl);
|
||
|
|
exit_driver:
|
||
|
|
platform_driver_unregister(&as7116_54x_led_driver);
|
||
|
|
exit:
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void __exit as7116_54x_led_exit(void)
|
||
|
|
{
|
||
|
|
platform_device_unregister(ledctl->pdev);
|
||
|
|
platform_driver_unregister(&as7116_54x_led_driver);
|
||
|
|
kfree(ledctl);
|
||
|
|
}
|
||
|
|
|
||
|
|
module_init(as7116_54x_led_init);
|
||
|
|
module_exit(as7116_54x_led_exit);
|
||
|
|
|
||
|
|
MODULE_AUTHOR("Brandon Chuang <brandon_chuang@accton.com.tw>");
|
||
|
|
MODULE_DESCRIPTION("accton_as7116_54x_led driver");
|
||
|
|
MODULE_LICENSE("GPL");
|
||
|
|
|