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![Lee Jones](/assets/img/avatar_default.png)
Fixes the following W=1 kernel build warning(s): drivers/leds/leds-mlxcpld.c:72: warning: cannot understand function prototype: 'struct mlxcpld_param ' drivers/leds/leds-mlxcpld.c:83: warning: cannot understand function prototype: 'struct mlxcpld_led_priv ' drivers/leds/leds-mlxcpld.c:98: warning: cannot understand function prototype: 'struct mlxcpld_led_profile ' drivers/leds/leds-mlxcpld.c:114: warning: cannot understand function prototype: 'struct mlxcpld_led_pdata ' Cc: Vadim Pasternak <vadimp@nvidia.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: linux-leds@vger.kernel.org Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Pavel Machek <pavel@ucw.cz>
435 lines
12 KiB
C
435 lines
12 KiB
C
/*
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* drivers/leds/leds-mlxcpld.c
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* Copyright (c) 2016 Mellanox Technologies. All rights reserved.
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* Copyright (c) 2016 Vadim Pasternak <vadimp@mellanox.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the names of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <linux/acpi.h>
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#include <linux/device.h>
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#include <linux/dmi.h>
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#include <linux/hwmon.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/io.h>
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#include <linux/leds.h>
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#include <linux/module.h>
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#include <linux/mod_devicetable.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#define MLXPLAT_CPLD_LPC_REG_BASE_ADRR 0x2500 /* LPC bus access */
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/* Color codes for LEDs */
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#define MLXCPLD_LED_OFFSET_HALF 0x01 /* Offset from solid: 3Hz blink */
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#define MLXCPLD_LED_OFFSET_FULL 0x02 /* Offset from solid: 6Hz blink */
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#define MLXCPLD_LED_IS_OFF 0x00 /* Off */
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#define MLXCPLD_LED_RED_STATIC_ON 0x05 /* Solid red */
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#define MLXCPLD_LED_RED_BLINK_HALF (MLXCPLD_LED_RED_STATIC_ON + \
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MLXCPLD_LED_OFFSET_HALF)
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#define MLXCPLD_LED_RED_BLINK_FULL (MLXCPLD_LED_RED_STATIC_ON + \
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MLXCPLD_LED_OFFSET_FULL)
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#define MLXCPLD_LED_GREEN_STATIC_ON 0x0D /* Solid green */
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#define MLXCPLD_LED_GREEN_BLINK_HALF (MLXCPLD_LED_GREEN_STATIC_ON + \
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MLXCPLD_LED_OFFSET_HALF)
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#define MLXCPLD_LED_GREEN_BLINK_FULL (MLXCPLD_LED_GREEN_STATIC_ON + \
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MLXCPLD_LED_OFFSET_FULL)
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#define MLXCPLD_LED_BLINK_3HZ 167 /* ~167 msec off/on */
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#define MLXCPLD_LED_BLINK_6HZ 83 /* ~83 msec off/on */
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/**
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* struct mlxcpld_param - LED access parameters:
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* @offset: offset for LED access in CPLD device
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* @mask: mask for LED access in CPLD device
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* @base_color: base color code for LED
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**/
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struct mlxcpld_param {
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u8 offset;
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u8 mask;
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u8 base_color;
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};
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/**
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* struct mlxcpld_led_priv - LED private data:
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* @cled: LED class device instance
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* @param: LED CPLD access parameters
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**/
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struct mlxcpld_led_priv {
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struct led_classdev cdev;
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struct mlxcpld_param param;
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};
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#define cdev_to_priv(c) container_of(c, struct mlxcpld_led_priv, cdev)
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/**
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* struct mlxcpld_led_profile - system LED profile (defined per system class):
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* @offset: offset for LED access in CPLD device
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* @mask: mask for LED access in CPLD device
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* @base_color: base color code
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* @brightness: default brightness setting (on/off)
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* @name: LED name
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**/
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struct mlxcpld_led_profile {
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u8 offset;
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u8 mask;
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u8 base_color;
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enum led_brightness brightness;
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const char *name;
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};
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/**
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* struct mlxcpld_led_pdata - system LED private data
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* @pdev: platform device pointer
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* @pled: LED class device instance
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* @profile: system configuration profile
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* @num_led_instances: number of LED instances
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* @lock: device access lock
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**/
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struct mlxcpld_led_pdata {
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struct platform_device *pdev;
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struct mlxcpld_led_priv *pled;
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struct mlxcpld_led_profile *profile;
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int num_led_instances;
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spinlock_t lock;
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};
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static struct mlxcpld_led_pdata *mlxcpld_led;
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/* Default profile fit the next Mellanox systems:
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* "msx6710", "msx6720", "msb7700", "msn2700", "msx1410",
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* "msn2410", "msb7800", "msn2740"
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*/
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static struct mlxcpld_led_profile mlxcpld_led_default_profile[] = {
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{
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0x21, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, 1,
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"mlxcpld:fan1:green",
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},
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{
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0x21, 0xf0, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
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"mlxcpld:fan1:red",
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},
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{
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0x21, 0x0f, MLXCPLD_LED_GREEN_STATIC_ON, 1,
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"mlxcpld:fan2:green",
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},
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{
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0x21, 0x0f, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
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"mlxcpld:fan2:red",
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},
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{
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0x22, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, 1,
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"mlxcpld:fan3:green",
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},
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{
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0x22, 0xf0, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
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"mlxcpld:fan3:red",
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},
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{
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0x22, 0x0f, MLXCPLD_LED_GREEN_STATIC_ON, 1,
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"mlxcpld:fan4:green",
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},
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{
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0x22, 0x0f, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
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"mlxcpld:fan4:red",
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},
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{
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0x20, 0x0f, MLXCPLD_LED_GREEN_STATIC_ON, 1,
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"mlxcpld:psu:green",
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},
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{
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0x20, 0x0f, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
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"mlxcpld:psu:red",
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},
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{
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0x20, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, 1,
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"mlxcpld:status:green",
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},
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{
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0x20, 0xf0, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
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"mlxcpld:status:red",
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},
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};
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/* Profile fit the Mellanox systems based on "msn2100" */
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static struct mlxcpld_led_profile mlxcpld_led_msn2100_profile[] = {
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{
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0x21, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, 1,
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"mlxcpld:fan:green",
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},
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{
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0x21, 0xf0, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
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"mlxcpld:fan:red",
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},
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{
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0x23, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, 1,
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"mlxcpld:psu1:green",
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},
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{
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0x23, 0xf0, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
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"mlxcpld:psu1:red",
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},
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{
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0x23, 0x0f, MLXCPLD_LED_GREEN_STATIC_ON, 1,
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"mlxcpld:psu2:green",
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},
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{
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0x23, 0x0f, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
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"mlxcpld:psu2:red",
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},
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{
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0x20, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, 1,
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"mlxcpld:status:green",
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},
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{
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0x20, 0xf0, MLXCPLD_LED_RED_STATIC_ON, LED_OFF,
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"mlxcpld:status:red",
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},
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{
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0x24, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, LED_OFF,
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"mlxcpld:uid:blue",
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},
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};
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enum mlxcpld_led_platform_types {
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MLXCPLD_LED_PLATFORM_DEFAULT,
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MLXCPLD_LED_PLATFORM_MSN2100,
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};
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static const char *mlx_product_names[] = {
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"DEFAULT",
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"MSN2100",
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};
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static enum
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mlxcpld_led_platform_types mlxcpld_led_platform_check_sys_type(void)
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{
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const char *mlx_product_name;
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int i;
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mlx_product_name = dmi_get_system_info(DMI_PRODUCT_NAME);
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if (!mlx_product_name)
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return MLXCPLD_LED_PLATFORM_DEFAULT;
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for (i = 1; i < ARRAY_SIZE(mlx_product_names); i++) {
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if (strstr(mlx_product_name, mlx_product_names[i]))
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return i;
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}
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return MLXCPLD_LED_PLATFORM_DEFAULT;
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}
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static void mlxcpld_led_bus_access_func(u16 base, u8 offset, u8 rw_flag,
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u8 *data)
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{
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u32 addr = base + offset;
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if (rw_flag == 0)
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outb(*data, addr);
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else
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*data = inb(addr);
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}
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static void mlxcpld_led_store_hw(u8 mask, u8 off, u8 vset)
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{
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u8 nib, val;
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/*
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* Each LED is controlled through low or high nibble of the relevant
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* CPLD register. Register offset is specified by off parameter.
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* Parameter vset provides color code: 0x0 for off, 0x5 for solid red,
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* 0x6 for 3Hz blink red, 0xd for solid green, 0xe for 3Hz blink
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* green.
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* Parameter mask specifies which nibble is used for specific LED: mask
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* 0xf0 - lower nibble is to be used (bits from 0 to 3), mask 0x0f -
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* higher nibble (bits from 4 to 7).
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*/
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spin_lock(&mlxcpld_led->lock);
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mlxcpld_led_bus_access_func(MLXPLAT_CPLD_LPC_REG_BASE_ADRR, off, 1,
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&val);
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nib = (mask == 0xf0) ? vset : (vset << 4);
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val = (val & mask) | nib;
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mlxcpld_led_bus_access_func(MLXPLAT_CPLD_LPC_REG_BASE_ADRR, off, 0,
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&val);
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spin_unlock(&mlxcpld_led->lock);
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}
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static void mlxcpld_led_brightness_set(struct led_classdev *led,
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enum led_brightness value)
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{
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struct mlxcpld_led_priv *pled = cdev_to_priv(led);
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if (value) {
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mlxcpld_led_store_hw(pled->param.mask, pled->param.offset,
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pled->param.base_color);
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return;
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}
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mlxcpld_led_store_hw(pled->param.mask, pled->param.offset,
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MLXCPLD_LED_IS_OFF);
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}
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static int mlxcpld_led_blink_set(struct led_classdev *led,
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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 mlxcpld_led_priv *pled = cdev_to_priv(led);
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/*
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* HW supports two types of blinking: full (6Hz) and half (3Hz).
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* For delay on/off zero default setting 3Hz is used.
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*/
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if (!(*delay_on == 0 && *delay_off == 0) &&
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!(*delay_on == MLXCPLD_LED_BLINK_3HZ &&
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*delay_off == MLXCPLD_LED_BLINK_3HZ) &&
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!(*delay_on == MLXCPLD_LED_BLINK_6HZ &&
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*delay_off == MLXCPLD_LED_BLINK_6HZ))
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return -EINVAL;
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if (*delay_on == MLXCPLD_LED_BLINK_6HZ)
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mlxcpld_led_store_hw(pled->param.mask, pled->param.offset,
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pled->param.base_color +
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MLXCPLD_LED_OFFSET_FULL);
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else
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mlxcpld_led_store_hw(pled->param.mask, pled->param.offset,
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pled->param.base_color +
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MLXCPLD_LED_OFFSET_HALF);
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return 0;
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}
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static int mlxcpld_led_config(struct device *dev,
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struct mlxcpld_led_pdata *cpld)
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{
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int i;
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int err;
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cpld->pled = devm_kcalloc(dev,
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cpld->num_led_instances,
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sizeof(struct mlxcpld_led_priv),
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GFP_KERNEL);
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if (!cpld->pled)
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return -ENOMEM;
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for (i = 0; i < cpld->num_led_instances; i++) {
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cpld->pled[i].cdev.name = cpld->profile[i].name;
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cpld->pled[i].cdev.brightness = cpld->profile[i].brightness;
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cpld->pled[i].cdev.max_brightness = 1;
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cpld->pled[i].cdev.brightness_set = mlxcpld_led_brightness_set;
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cpld->pled[i].cdev.blink_set = mlxcpld_led_blink_set;
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cpld->pled[i].cdev.flags = LED_CORE_SUSPENDRESUME;
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err = devm_led_classdev_register(dev, &cpld->pled[i].cdev);
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if (err)
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return err;
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cpld->pled[i].param.offset = mlxcpld_led->profile[i].offset;
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cpld->pled[i].param.mask = mlxcpld_led->profile[i].mask;
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cpld->pled[i].param.base_color =
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mlxcpld_led->profile[i].base_color;
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if (mlxcpld_led->profile[i].brightness)
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mlxcpld_led_brightness_set(&cpld->pled[i].cdev,
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mlxcpld_led->profile[i].brightness);
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}
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return 0;
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}
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static int __init mlxcpld_led_probe(struct platform_device *pdev)
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{
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enum mlxcpld_led_platform_types mlxcpld_led_plat =
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mlxcpld_led_platform_check_sys_type();
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mlxcpld_led = devm_kzalloc(&pdev->dev, sizeof(*mlxcpld_led),
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GFP_KERNEL);
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if (!mlxcpld_led)
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return -ENOMEM;
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mlxcpld_led->pdev = pdev;
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switch (mlxcpld_led_plat) {
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case MLXCPLD_LED_PLATFORM_MSN2100:
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mlxcpld_led->profile = mlxcpld_led_msn2100_profile;
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mlxcpld_led->num_led_instances =
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ARRAY_SIZE(mlxcpld_led_msn2100_profile);
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break;
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default:
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mlxcpld_led->profile = mlxcpld_led_default_profile;
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mlxcpld_led->num_led_instances =
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ARRAY_SIZE(mlxcpld_led_default_profile);
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break;
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}
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spin_lock_init(&mlxcpld_led->lock);
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return mlxcpld_led_config(&pdev->dev, mlxcpld_led);
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}
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static struct platform_driver mlxcpld_led_driver = {
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.driver = {
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.name = KBUILD_MODNAME,
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},
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};
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static int __init mlxcpld_led_init(void)
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{
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struct platform_device *pdev;
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int err;
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if (!dmi_match(DMI_CHASSIS_VENDOR, "Mellanox Technologies Ltd."))
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return -ENODEV;
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pdev = platform_device_register_simple(KBUILD_MODNAME, -1, NULL, 0);
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if (IS_ERR(pdev)) {
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pr_err("Device allocation failed\n");
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return PTR_ERR(pdev);
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}
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err = platform_driver_probe(&mlxcpld_led_driver, mlxcpld_led_probe);
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if (err) {
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pr_err("Probe platform driver failed\n");
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platform_device_unregister(pdev);
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}
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return err;
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}
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static void __exit mlxcpld_led_exit(void)
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{
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platform_device_unregister(mlxcpld_led->pdev);
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platform_driver_unregister(&mlxcpld_led_driver);
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}
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module_init(mlxcpld_led_init);
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module_exit(mlxcpld_led_exit);
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MODULE_AUTHOR("Vadim Pasternak <vadimp@mellanox.com>");
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MODULE_DESCRIPTION("Mellanox board LED driver");
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MODULE_LICENSE("Dual BSD/GPL");
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MODULE_ALIAS("platform:leds_mlxcpld");
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