leds: add driver for Mellanox systems LEDs
This makes it possible to create a set of LEDs for Mellanox systems: "msx6710", "msx6720", "msb7700", "msn2700", "msx1410", "msn2410", "msb7800", "msn2740", "msn2100". Driver obtains LED devices according to system configuration, provided through system DMI data, like mlxcpld:fan1:green, mlxcpld:fan1:red and creates devices in form: "devicename:colour:function". LED setting is controlled through on board CPLD Lattice device. For setting particular LED off, solid, blink: echo 0 > /sys/class/leds/mlxcpld\:status\:green/brightness echo 1 > /sys/class/leds/mlxcpld\:status\:green/brightness echo timer > /sys/class/leds/mlxcpld\:status\:green/trigger On module probing all LEDs are set green, on removing - off. Last setting overwrites previous, f.e. sequence for changing LED from green - red - green: echo 1 > /sys/class/leds/mlxcpld\:psu\:green/brightness echo 1 > /sys/class/leds/mlxcpld\:psu\:red/brightness echo 1 > /sys/class/leds/mlxcpld\:psu\:green/brightness Note: LEDs cannot be turned on/off simultaneously. The Kconfig currently controlling compilation of this code is: drivers/leds/Kconfig:config LEDS_MLXCPLD Signed-off-by: Vadim Pasternak <vadimp@mellanox.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Reviewed-by: Wei Yongjun <weiyongjun1@huawei.com> Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
This commit is contained in:
Vadim Pasternak
Jacek Anaszewski
Родитель
1f70cb4045
Коммит
be4fdf99fa
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@ -0,0 +1,110 @@
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Kernel driver for Mellanox systems LEDs
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=======================================
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Provide system LED support for the nex Mellanox systems:
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"msx6710", "msx6720", "msb7700", "msn2700", "msx1410",
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"msn2410", "msb7800", "msn2740", "msn2100".
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Description
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-----------
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Driver provides the following LEDs for the systems "msx6710", "msx6720",
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"msb7700", "msn2700", "msx1410", "msn2410", "msb7800", "msn2740":
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mlxcpld:fan1:green
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mlxcpld:fan1:red
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mlxcpld:fan2:green
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mlxcpld:fan2:red
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mlxcpld:fan3:green
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mlxcpld:fan3:red
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mlxcpld:fan4:green
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mlxcpld:fan4:red
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mlxcpld:psu:green
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mlxcpld:psu:red
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mlxcpld:status:green
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mlxcpld:status:red
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"status"
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CPLD reg offset: 0x20
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Bits [3:0]
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"psu"
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CPLD reg offset: 0x20
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Bits [7:4]
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"fan1"
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CPLD reg offset: 0x21
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Bits [3:0]
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"fan2"
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CPLD reg offset: 0x21
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Bits [7:4]
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"fan3"
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CPLD reg offset: 0x22
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Bits [3:0]
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"fan4"
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CPLD reg offset: 0x22
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Bits [7:4]
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Color mask for all the above LEDs:
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[bit3,bit2,bit1,bit0] or
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[bit7,bit6,bit5,bit4]:
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[0,0,0,0] = LED OFF
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[0,1,0,1] = Red static ON
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[1,1,0,1] = Green static ON
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[0,1,1,0] = Red blink 3Hz
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[1,1,1,0] = Green blink 3Hz
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[0,1,1,1] = Red blink 6Hz
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[1,1,1,1] = Green blink 6Hz
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Driver provides the following LEDs for the system "msn2100":
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mlxcpld:fan:green
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mlxcpld:fan:red
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mlxcpld:psu1:green
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mlxcpld:psu1:red
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mlxcpld:psu2:green
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mlxcpld:psu2:red
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mlxcpld:status:green
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mlxcpld:status:red
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mlxcpld:uid:blue
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"status"
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CPLD reg offset: 0x20
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Bits [3:0]
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"fan"
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CPLD reg offset: 0x21
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Bits [3:0]
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"psu1"
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CPLD reg offset: 0x23
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Bits [3:0]
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"psu2"
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CPLD reg offset: 0x23
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Bits [7:4]
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"uid"
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CPLD reg offset: 0x24
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Bits [3:0]
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Color mask for all the above LEDs, excepted uid:
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[bit3,bit2,bit1,bit0] or
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[bit7,bit6,bit5,bit4]:
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[0,0,0,0] = LED OFF
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[0,1,0,1] = Red static ON
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[1,1,0,1] = Green static ON
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[0,1,1,0] = Red blink 3Hz
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[1,1,1,0] = Green blink 3Hz
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[0,1,1,1] = Red blink 6Hz
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[1,1,1,1] = Green blink 6Hz
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Color mask for uid LED:
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[bit3,bit2,bit1,bit0]:
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[0,0,0,0] = LED OFF
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[1,1,0,1] = Blue static ON
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[1,1,1,0] = Blue blink 3Hz
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[1,1,1,1] = Blue blink 6Hz
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Driver supports HW blinking at 3Hz and 6Hz frequency (50% duty cycle).
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For 3Hz duty cylce is about 167 msec, for 6Hz is about 83 msec.
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@ -7649,6 +7649,13 @@ W: http://www.mellanox.com
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Q: http://patchwork.ozlabs.org/project/netdev/list/
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F: drivers/net/ethernet/mellanox/mlxsw/
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MELLANOX MLXCPLD LED DRIVER
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M: Vadim Pasternak <vadimp@mellanox.com>
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L: linux-leds@vger.kernel.org
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S: Supported
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F: drivers/leds/leds-mlxcpld.c
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F: Documentation/leds/leds-mlxcpld.txt
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SOFT-ROCE DRIVER (rxe)
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M: Moni Shoua <monis@mellanox.com>
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L: linux-rdma@vger.kernel.org
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@ -651,6 +651,14 @@ config LEDS_PM8058
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Choose this option if you want to use the LED drivers in
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the Qualcomm PM8058 PMIC.
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config LEDS_MLXCPLD
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tristate "LED support for the Mellanox boards"
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depends on X86_64 && DMI
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depends on LEDS_CLASS
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help
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This option enabled support for the LEDs on the Mellanox
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boards. Say Y to enabled these.
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comment "LED Triggers"
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source "drivers/leds/trigger/Kconfig"
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@ -70,6 +70,7 @@ obj-$(CONFIG_LEDS_SEAD3) += leds-sead3.o
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obj-$(CONFIG_LEDS_IS31FL319X) += leds-is31fl319x.o
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obj-$(CONFIG_LEDS_IS31FL32XX) += leds-is31fl32xx.o
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obj-$(CONFIG_LEDS_PM8058) += leds-pm8058.o
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obj-$(CONFIG_LEDS_MLXCPLD) += leds-mlxcpld.o
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# LED SPI Drivers
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obj-$(CONFIG_LEDS_DAC124S085) += leds-dac124s085.o
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@ -0,0 +1,430 @@
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/*
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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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* 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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* 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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* 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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* 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
|
||||
* CPLD register. Register offset is specified by off parameter.
|
||||
* Parameter vset provides color code: 0x0 for off, 0x5 for solid red,
|
||||
* 0x6 for 3Hz blink red, 0xd for solid green, 0xe for 3Hz blink
|
||||
* green.
|
||||
* Parameter mask specifies which nibble is used for specific LED: mask
|
||||
* 0xf0 - lower nibble is to be used (bits from 0 to 3), mask 0x0f -
|
||||
* higher nibble (bits from 4 to 7).
|
||||
*/
|
||||
spin_lock(&mlxcpld_led->lock);
|
||||
mlxcpld_led_bus_access_func(MLXPLAT_CPLD_LPC_REG_BASE_ADRR, off, 1,
|
||||
&val);
|
||||
nib = (mask == 0xf0) ? vset : (vset << 4);
|
||||
val = (val & mask) | nib;
|
||||
mlxcpld_led_bus_access_func(MLXPLAT_CPLD_LPC_REG_BASE_ADRR, off, 0,
|
||||
&val);
|
||||
spin_unlock(&mlxcpld_led->lock);
|
||||
}
|
||||
|
||||
static void mlxcpld_led_brightness_set(struct led_classdev *led,
|
||||
enum led_brightness value)
|
||||
{
|
||||
struct mlxcpld_led_priv *pled = cdev_to_priv(led);
|
||||
|
||||
if (value) {
|
||||
mlxcpld_led_store_hw(pled->param.mask, pled->param.offset,
|
||||
pled->param.base_color);
|
||||
return;
|
||||
}
|
||||
|
||||
mlxcpld_led_store_hw(pled->param.mask, pled->param.offset,
|
||||
MLXCPLD_LED_IS_OFF);
|
||||
}
|
||||
|
||||
static int mlxcpld_led_blink_set(struct led_classdev *led,
|
||||
unsigned long *delay_on,
|
||||
unsigned long *delay_off)
|
||||
{
|
||||
struct mlxcpld_led_priv *pled = cdev_to_priv(led);
|
||||
|
||||
/*
|
||||
* HW supports two types of blinking: full (6Hz) and half (3Hz).
|
||||
* For delay on/off zero default setting 3Hz is used.
|
||||
*/
|
||||
if (!(*delay_on == 0 && *delay_off == 0) &&
|
||||
!(*delay_on == MLXCPLD_LED_BLINK_3HZ &&
|
||||
*delay_off == MLXCPLD_LED_BLINK_3HZ) &&
|
||||
!(*delay_on == MLXCPLD_LED_BLINK_6HZ &&
|
||||
*delay_off == MLXCPLD_LED_BLINK_6HZ))
|
||||
return -EINVAL;
|
||||
|
||||
if (*delay_on == MLXCPLD_LED_BLINK_6HZ)
|
||||
mlxcpld_led_store_hw(pled->param.mask, pled->param.offset,
|
||||
pled->param.base_color +
|
||||
MLXCPLD_LED_OFFSET_FULL);
|
||||
else
|
||||
mlxcpld_led_store_hw(pled->param.mask, pled->param.offset,
|
||||
pled->param.base_color +
|
||||
MLXCPLD_LED_OFFSET_HALF);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mlxcpld_led_config(struct device *dev,
|
||||
struct mlxcpld_led_pdata *cpld)
|
||||
{
|
||||
int i;
|
||||
int err;
|
||||
|
||||
cpld->pled = devm_kzalloc(dev, sizeof(struct mlxcpld_led_priv) *
|
||||
cpld->num_led_instances, GFP_KERNEL);
|
||||
if (!cpld->pled)
|
||||
return -ENOMEM;
|
||||
|
||||
for (i = 0; i < cpld->num_led_instances; i++) {
|
||||
cpld->pled[i].cdev.name = cpld->profile[i].name;
|
||||
cpld->pled[i].cdev.brightness = cpld->profile[i].brightness;
|
||||
cpld->pled[i].cdev.max_brightness = 1;
|
||||
cpld->pled[i].cdev.brightness_set = mlxcpld_led_brightness_set;
|
||||
cpld->pled[i].cdev.blink_set = mlxcpld_led_blink_set;
|
||||
cpld->pled[i].cdev.flags = LED_CORE_SUSPENDRESUME;
|
||||
err = devm_led_classdev_register(dev, &cpld->pled[i].cdev);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
cpld->pled[i].param.offset = mlxcpld_led->profile[i].offset;
|
||||
cpld->pled[i].param.mask = mlxcpld_led->profile[i].mask;
|
||||
cpld->pled[i].param.base_color =
|
||||
mlxcpld_led->profile[i].base_color;
|
||||
|
||||
if (mlxcpld_led->profile[i].brightness)
|
||||
mlxcpld_led_brightness_set(&cpld->pled[i].cdev,
|
||||
mlxcpld_led->profile[i].brightness);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __init mlxcpld_led_probe(struct platform_device *pdev)
|
||||
{
|
||||
enum mlxcpld_led_platform_types mlxcpld_led_plat =
|
||||
mlxcpld_led_platform_check_sys_type();
|
||||
|
||||
mlxcpld_led = devm_kzalloc(&pdev->dev, sizeof(*mlxcpld_led),
|
||||
GFP_KERNEL);
|
||||
if (!mlxcpld_led)
|
||||
return -ENOMEM;
|
||||
|
||||
mlxcpld_led->pdev = pdev;
|
||||
|
||||
switch (mlxcpld_led_plat) {
|
||||
case MLXCPLD_LED_PLATFORM_MSN2100:
|
||||
mlxcpld_led->profile = mlxcpld_led_msn2100_profile;
|
||||
mlxcpld_led->num_led_instances =
|
||||
ARRAY_SIZE(mlxcpld_led_msn2100_profile);
|
||||
break;
|
||||
|
||||
default:
|
||||
mlxcpld_led->profile = mlxcpld_led_default_profile;
|
||||
mlxcpld_led->num_led_instances =
|
||||
ARRAY_SIZE(mlxcpld_led_default_profile);
|
||||
break;
|
||||
}
|
||||
|
||||
spin_lock_init(&mlxcpld_led->lock);
|
||||
|
||||
return mlxcpld_led_config(&pdev->dev, mlxcpld_led);
|
||||
}
|
||||
|
||||
static struct platform_driver mlxcpld_led_driver = {
|
||||
.driver = {
|
||||
.name = KBUILD_MODNAME,
|
||||
},
|
||||
};
|
||||
|
||||
static int __init mlxcpld_led_init(void)
|
||||
{
|
||||
struct platform_device *pdev;
|
||||
int err;
|
||||
|
||||
pdev = platform_device_register_simple(KBUILD_MODNAME, -1, NULL, 0);
|
||||
if (IS_ERR(pdev)) {
|
||||
pr_err("Device allocation failed\n");
|
||||
return PTR_ERR(pdev);
|
||||
}
|
||||
|
||||
err = platform_driver_probe(&mlxcpld_led_driver, mlxcpld_led_probe);
|
||||
if (err) {
|
||||
pr_err("Probe platform driver failed\n");
|
||||
platform_device_unregister(pdev);
|
||||
}
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static void __exit mlxcpld_led_exit(void)
|
||||
{
|
||||
platform_device_unregister(mlxcpld_led->pdev);
|
||||
platform_driver_unregister(&mlxcpld_led_driver);
|
||||
}
|
||||
|
||||
module_init(mlxcpld_led_init);
|
||||
module_exit(mlxcpld_led_exit);
|
||||
|
||||
MODULE_AUTHOR("Vadim Pasternak <vadimp@mellanox.com>");
|
||||
MODULE_DESCRIPTION("Mellanox board LED driver");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
MODULE_ALIAS("platform:leds_mlxcpld");
|
||||
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