diff options
Diffstat (limited to 'drivers/leds')
| -rw-r--r-- | drivers/leds/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/leds/Makefile | 1 | ||||
| -rw-r--r-- | drivers/leds/leds-mlxcpld.c | 430 |
3 files changed, 439 insertions, 0 deletions
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index 969c720dfd10..7a628c6516f6 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -651,6 +651,14 @@ config LEDS_PM8058 Choose this option if you want to use the LED drivers in the Qualcomm PM8058 PMIC. +config LEDS_MLXCPLD + tristate "LED support for the Mellanox boards" + depends on X86_64 && DMI + depends on LEDS_CLASS + help + This option enabled support for the LEDs on the Mellanox + boards. Say Y to enabled these. + comment "LED Triggers" source "drivers/leds/trigger/Kconfig" diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index 06a27ef17554..3965070190f5 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -70,6 +70,7 @@ obj-$(CONFIG_LEDS_SEAD3) += leds-sead3.o obj-$(CONFIG_LEDS_IS31FL319X) += leds-is31fl319x.o obj-$(CONFIG_LEDS_IS31FL32XX) += leds-is31fl32xx.o obj-$(CONFIG_LEDS_PM8058) += leds-pm8058.o +obj-$(CONFIG_LEDS_MLXCPLD) += leds-mlxcpld.o # LED SPI Drivers obj-$(CONFIG_LEDS_DAC124S085) += leds-dac124s085.o diff --git a/drivers/leds/leds-mlxcpld.c b/drivers/leds/leds-mlxcpld.c new file mode 100644 index 000000000000..197ab9b29a9c --- /dev/null +++ b/drivers/leds/leds-mlxcpld.c @@ -0,0 +1,430 @@ +/* + * drivers/leds/leds-mlxcpld.c + * Copyright (c) 2016 Mellanox Technologies. All rights reserved. + * Copyright (c) 2016 Vadim Pasternak <vadimp@mellanox.com> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the names of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <linux/acpi.h> +#include <linux/device.h> +#include <linux/dmi.h> +#include <linux/hwmon.h> +#include <linux/hwmon-sysfs.h> +#include <linux/io.h> +#include <linux/leds.h> +#include <linux/module.h> +#include <linux/mod_devicetable.h> +#include <linux/platform_device.h> +#include <linux/slab.h> + +#define MLXPLAT_CPLD_LPC_REG_BASE_ADRR 0x2500 /* LPC bus access */ + +/* Color codes for LEDs */ +#define MLXCPLD_LED_OFFSET_HALF 0x01 /* Offset from solid: 3Hz blink */ +#define MLXCPLD_LED_OFFSET_FULL 0x02 /* Offset from solid: 6Hz blink */ +#define MLXCPLD_LED_IS_OFF 0x00 /* Off */ +#define MLXCPLD_LED_RED_STATIC_ON 0x05 /* Solid red */ +#define MLXCPLD_LED_RED_BLINK_HALF (MLXCPLD_LED_RED_STATIC_ON + \ + MLXCPLD_LED_OFFSET_HALF) +#define MLXCPLD_LED_RED_BLINK_FULL (MLXCPLD_LED_RED_STATIC_ON + \ + MLXCPLD_LED_OFFSET_FULL) +#define MLXCPLD_LED_GREEN_STATIC_ON 0x0D /* Solid green */ +#define MLXCPLD_LED_GREEN_BLINK_HALF (MLXCPLD_LED_GREEN_STATIC_ON + \ + MLXCPLD_LED_OFFSET_HALF) +#define MLXCPLD_LED_GREEN_BLINK_FULL (MLXCPLD_LED_GREEN_STATIC_ON + \ + MLXCPLD_LED_OFFSET_FULL) +#define MLXCPLD_LED_BLINK_3HZ 167 /* ~167 msec off/on */ +#define MLXCPLD_LED_BLINK_6HZ 83 /* ~83 msec off/on */ + +/** + * mlxcpld_param - LED access parameters: + * @offset - offset for LED access in CPLD device + * @mask - mask for LED access in CPLD device + * @base_color - base color code for LED +**/ +struct mlxcpld_param { + u8 offset; + u8 mask; + u8 base_color; +}; + +/** + * mlxcpld_led_priv - LED private data: + * @cled - LED class device instance + * @param - LED CPLD access parameters +**/ +struct mlxcpld_led_priv { + struct led_classdev cdev; + struct mlxcpld_param param; +}; + +#define cdev_to_priv(c) container_of(c, struct mlxcpld_led_priv, cdev) + +/** + * mlxcpld_led_profile - system LED profile (defined per system class): + * @offset - offset for LED access in CPLD device + * @mask - mask for LED access in CPLD device + * @base_color - base color code + * @brightness - default brightness setting (on/off) + * @name - LED name +**/ +struct mlxcpld_led_profile { + u8 offset; + u8 mask; + u8 base_color; + enum led_brightness brightness; + const char *name; +}; + +/** + * mlxcpld_led_pdata - system LED private data + * @pdev - platform device pointer + * @pled - LED class device instance + * @profile - system configuration profile + * @num_led_instances - number of LED instances + * @lock - device access lock +**/ +struct mlxcpld_led_pdata { + struct platform_device *pdev; + struct mlxcpld_led_priv *pled; + struct mlxcpld_led_profile *profile; + int num_led_instances; + spinlock_t lock; +}; + +static struct mlxcpld_led_pdata *mlxcpld_led; + +/* Default profile fit the next Mellanox systems: + * "msx6710", "msx6720", "msb7700", "msn2700", "msx1410", + * "msn2410", "msb7800", "msn2740" + */ +static struct mlxcpld_led_profile mlxcpld_led_default_profile[] = { + { + 0x21, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, 1, + "mlxcpld:fan1:green", + }, + { + 0x21, 0xf0, MLXCPLD_LED_RED_STATIC_ON, LED_OFF, + "mlxcpld:fan1:red", + }, + { + 0x21, 0x0f, MLXCPLD_LED_GREEN_STATIC_ON, 1, + "mlxcpld:fan2:green", + }, + { + 0x21, 0x0f, MLXCPLD_LED_RED_STATIC_ON, LED_OFF, + "mlxcpld:fan2:red", + }, + { + 0x22, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, 1, + "mlxcpld:fan3:green", + }, + { + 0x22, 0xf0, MLXCPLD_LED_RED_STATIC_ON, LED_OFF, + "mlxcpld:fan3:red", + }, + { + 0x22, 0x0f, MLXCPLD_LED_GREEN_STATIC_ON, 1, + "mlxcpld:fan4:green", + }, + { + 0x22, 0x0f, MLXCPLD_LED_RED_STATIC_ON, LED_OFF, + "mlxcpld:fan4:red", + }, + { + 0x20, 0x0f, MLXCPLD_LED_GREEN_STATIC_ON, 1, + "mlxcpld:psu:green", + }, + { + 0x20, 0x0f, MLXCPLD_LED_RED_STATIC_ON, LED_OFF, + "mlxcpld:psu:red", + }, + { + 0x20, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, 1, + "mlxcpld:status:green", + }, + { + 0x20, 0xf0, MLXCPLD_LED_RED_STATIC_ON, LED_OFF, + "mlxcpld:status:red", + }, +}; + +/* Profile fit the Mellanox systems based on "msn2100" */ +static struct mlxcpld_led_profile mlxcpld_led_msn2100_profile[] = { + { + 0x21, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, 1, + "mlxcpld:fan:green", + }, + { + 0x21, 0xf0, MLXCPLD_LED_RED_STATIC_ON, LED_OFF, + "mlxcpld:fan:red", + }, + { + 0x23, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, 1, + "mlxcpld:psu1:green", + }, + { + 0x23, 0xf0, MLXCPLD_LED_RED_STATIC_ON, LED_OFF, + "mlxcpld:psu1:red", + }, + { + 0x23, 0x0f, MLXCPLD_LED_GREEN_STATIC_ON, 1, + "mlxcpld:psu2:green", + }, + { + 0x23, 0x0f, MLXCPLD_LED_RED_STATIC_ON, LED_OFF, + "mlxcpld:psu2:red", + }, + { + 0x20, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, 1, + "mlxcpld:status:green", + }, + { + 0x20, 0xf0, MLXCPLD_LED_RED_STATIC_ON, LED_OFF, + "mlxcpld:status:red", + }, + { + 0x24, 0xf0, MLXCPLD_LED_GREEN_STATIC_ON, LED_OFF, + "mlxcpld:uid:blue", + }, +}; + +enum mlxcpld_led_platform_types { + MLXCPLD_LED_PLATFORM_DEFAULT, + MLXCPLD_LED_PLATFORM_MSN2100, +}; + +static const char *mlx_product_names[] = { + "DEFAULT", + "MSN2100", +}; + +static enum +mlxcpld_led_platform_types mlxcpld_led_platform_check_sys_type(void) +{ + const char *mlx_product_name; + int i; + + mlx_product_name = dmi_get_system_info(DMI_PRODUCT_NAME); + if (!mlx_product_name) + return MLXCPLD_LED_PLATFORM_DEFAULT; + + for (i = 1; i < ARRAY_SIZE(mlx_product_names); i++) { + if (strstr(mlx_product_name, mlx_product_names[i])) + return i; + } + + return MLXCPLD_LED_PLATFORM_DEFAULT; +} + +static void mlxcpld_led_bus_access_func(u16 base, u8 offset, u8 rw_flag, + u8 *data) +{ + u32 addr = base + offset; + + if (rw_flag == 0) + outb(*data, addr); + else + *data = inb(addr); +} + +static void mlxcpld_led_store_hw(u8 mask, u8 off, u8 vset) +{ + u8 nib, val; + + /* + * 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"); |