From: Jway Lin jway.lin@cortina-access.com
Add Cortina Access LED controller support for CAxxxx SOCs
Signed-off-by: Jway Lin jway.lin@cortina-access.com Signed-off-by: Alex Nemirovsky alex.nemirovsky@cortina-access.com CC: Simon Glass sjg@chromium.org
---
Changes in v5: None Changes in v4: - remove unused macros - remove cortina prefix from macros - remove use BSS variable - further cleanup to meet code style guidelines - add additinal struct comments - rename DT blink rate symbol
Changes in v3: None Changes in v2: None
MAINTAINERS | 2 + drivers/led/Kconfig | 8 ++ drivers/led/Makefile | 1 + drivers/led/led_cortina.c | 268 ++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 279 insertions(+) create mode 100644 drivers/led/led_cortina.c
diff --git a/MAINTAINERS b/MAINTAINERS index cc56ade..d812ce7 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -183,6 +183,7 @@ F: drivers/serial/serial_cortina.c F: drivers/mmc/ca_dw_mmc.c F: drivers/i2c/i2c-cortina.c F: drivers/i2c/i2c-cortina.h +F: drivers/led/led_cortina.c
ARM/CZ.NIC TURRIS MOX SUPPORT M: Marek Behun marek.behun@nic.cz @@ -698,6 +699,7 @@ F: drivers/serial/serial_cortina.c F: drivers/mmc/ca_dw_mmc.c F: drivers/i2c/i2c-cortina.c F: drivers/i2c/i2c-cortina.h +F: drivers/led/led_cortina.c
MIPS MSCC M: Gregory CLEMENT gregory.clement@bootlin.com diff --git a/drivers/led/Kconfig b/drivers/led/Kconfig index 6675934..cc87fbf 100644 --- a/drivers/led/Kconfig +++ b/drivers/led/Kconfig @@ -35,6 +35,14 @@ config LED_BCM6858 This option enables support for LEDs connected to the BCM6858 HW has blinking capabilities and up to 32 LEDs can be controlled.
+config LED_CORTINA + bool "LED Support for Cortina Access CAxxxx SoCs" + depends on LED && (CORTINA_PLATFORM) + help + This option enables support for LEDs connected to the Cortina + Access CAxxxx SOCs. + + config LED_BLINK bool "Support LED blinking" depends on LED diff --git a/drivers/led/Makefile b/drivers/led/Makefile index 3654dd3..8e3ae7f 100644 --- a/drivers/led/Makefile +++ b/drivers/led/Makefile @@ -8,3 +8,4 @@ obj-$(CONFIG_LED_BCM6328) += led_bcm6328.o obj-$(CONFIG_LED_BCM6358) += led_bcm6358.o obj-$(CONFIG_LED_BCM6858) += led_bcm6858.o obj-$(CONFIG_$(SPL_)LED_GPIO) += led_gpio.o +obj-$(CONFIG_LED_CORTINA) += led_cortina.o diff --git a/drivers/led/led_cortina.c b/drivers/led/led_cortina.c new file mode 100644 index 0000000..f873d30 --- /dev/null +++ b/drivers/led/led_cortina.c @@ -0,0 +1,268 @@ +// SPDX-License-Identifier: GPL-2.0+ + +/* + * Copyright (C) 2020 Cortina-Access + * Author: Jway Lin jway.lin@cortina-access.com + * + */ + +#include <common.h> +#include <dm.h> +#include <errno.h> +#include <led.h> +#include <asm/io.h> +#include <dm/lists.h> + +#define LED_MAX_HW_BLINK 127 +#define LED_MAX_COUNT 16 + +/* LED_CONTROL fields */ +#define LED_BLINK_RATE1_OFFSET 0 +#define LED_BLINK_RATE1_MASK 0xff +#define LED_BLINK_RATE2_OFFSET 8 +#define LED_BLINK_RATE2_MASK 0xff +#define LED_CLK_TEST BIT(16) +#define LED_CLK_POLARITY BIT(17) +#define LED_CLK_TEST_MODE BIT(16) +#define LED_CLK_TEST_RX_TEST BIT(30) +#define LED_CLK_TEST_TX_TEST BIT(31) + +/* LED_CONFIG fields */ +#define LED_EVENT_ON_OFFSET 0 +#define LED_EVENT_ON_MASK 0x7 +#define LED_EVENT_BLINK_OFFSET 3 +#define LED_EVENT_BLINK_MASK 0x7 +#define LED_EVENT_OFF_OFFSET 6 +#define LED_EVENT_OFF_MASK 0x7 +#define LED_OFF_ON_OFFSET 9 +#define LED_OFF_ON_MASK 0x3 +#define LED_PORT_OFFSET 11 +#define LED_PORT_MASK 0x7 +#define LED_OFF_VAL BIT(14) +#define LED_SW_EVENT BIT(15) +#define LED_BLINK_SEL BIT(16) + +/* LED_CONFIG structures */ +struct cortina_led_cfg { + void __iomem *regs; + int idx; + bool active_low; + int off_event; /* set led off event */ + int blink_event; /* set led blink event */ + int on_event; /* set led on event */ + int port; /* corresponding ethernet port */ + int blink; /* blink rate sel */ +}; + +static void cortina_led_write(void __iomem *reg, unsigned long data) +{ + writel(data, reg); +} + +static unsigned long cortina_led_read(void __iomem *reg) +{ + return readl(reg); +} + +static enum led_state_t cortina_led_get_state(struct udevice *dev) +{ + struct cortina_led_cfg *priv = dev_get_priv(dev); + enum led_state_t state = LEDST_OFF; + u32 val; + + val = readl(priv->regs); + + if (val & LED_SW_EVENT) + state = LEDST_ON; + + return state; +} + +static int cortina_led_set_state(struct udevice *dev, enum led_state_t state) +{ + u32 val; + struct cortina_led_cfg *priv = dev_get_priv(dev); + + val = readl(priv->regs); + + switch (state) { + case LEDST_OFF: + val &= ~LED_SW_EVENT; + val &= ~(LED_OFF_ON_MASK << LED_OFF_ON_OFFSET); + val |= 0x3 << LED_OFF_ON_OFFSET; + cortina_led_write(priv->regs, val); + break; + case LEDST_ON: + val |= LED_SW_EVENT; + val &= ~(LED_OFF_ON_MASK << LED_OFF_ON_OFFSET); + val |= 0x1 << LED_OFF_ON_OFFSET; + cortina_led_write(priv->regs, val); + break; + case LEDST_TOGGLE: + if (cortina_led_get_state(dev) == LEDST_OFF) + return cortina_led_set_state(dev, LEDST_ON); + else + return cortina_led_set_state(dev, LEDST_OFF); + break; + + default: + return -EINVAL; + } + + return 0; +} + +static const struct led_ops cortina_led_ops = { + .get_state = cortina_led_get_state, + .set_state = cortina_led_set_state, +}; + +static int cortina_led_probe(struct udevice *dev) +{ + struct led_uc_plat *uc_plat = dev_get_uclass_platdata(dev); + + /* Top-level LED node */ + if (!uc_plat->label) { + void __iomem *regs; + u32 reg_value, val; + u16 rate1, rate2; + + regs = dev_remap_addr(dev); + if (!regs) + return -EINVAL; + + reg_value = 0; + reg_value |= LED_CLK_POLARITY; + + rate1 = dev_read_u32_default(dev, "cortina,blink-rate1", 256); + rate2 = dev_read_u32_default(dev, "cortina,blink-rate2", 512); + + val = rate1 / 16 - 1; + rate1 = val > LED_MAX_HW_BLINK ? + LED_MAX_HW_BLINK : val; + reg_value |= (rate1 & LED_BLINK_RATE1_MASK) << + LED_BLINK_RATE1_OFFSET; + + val = rate2 / 16 - 1; + rate2 = val > LED_MAX_HW_BLINK ? + LED_MAX_HW_BLINK : val; + reg_value |= (rate2 & LED_BLINK_RATE2_MASK) << + LED_BLINK_RATE2_OFFSET; + + cortina_led_write(regs, reg_value); + + } else { + struct cortina_led_cfg *priv = dev_get_priv(dev); + void __iomem *regs; + u32 pin, val, blink, port, off_event, blink_event, on_event; + + regs = dev_remap_addr(dev_get_parent(dev)); + if (!regs) + return -EINVAL; + + pin = dev_read_u32_default(dev, "pin", LED_MAX_COUNT); + + if (pin >= LED_MAX_COUNT) + return -EINVAL; + + priv->regs = regs + 4 + pin * 4; + + val = cortina_led_read(priv->regs); + + if (dev_read_bool(dev, "active-low")) { + priv->active_low = true; + val |= LED_OFF_VAL; + } else { + priv->active_low = false; + val &= ~LED_OFF_VAL; + } + + blink = dev_read_u32_default(dev, "blink-sel", 0); + + if (blink == 0) { + priv->blink = 0; + val &= ~LED_BLINK_SEL; + } else if (blink == 1) { + priv->blink = 1; + val |= LED_BLINK_SEL; + } + + off_event = dev_read_u32_default(dev, "off-event", 3); + val &= ~(LED_EVENT_OFF_MASK << LED_EVENT_OFF_OFFSET); + if (off_event != 3) { + priv->off_event = off_event; + val |= BIT(off_event) << LED_EVENT_OFF_OFFSET; + } + + blink_event = dev_read_u32_default(dev, "blink-event", 3); + val &= ~(LED_EVENT_BLINK_MASK << LED_EVENT_BLINK_OFFSET); + if (blink_event != 3) { + priv->blink_event = blink_event; + val |= BIT(blink_event) << LED_EVENT_BLINK_OFFSET; + } + + on_event = dev_read_u32_default(dev, "on-event", 3); + val &= ~(LED_EVENT_ON_MASK << LED_EVENT_ON_OFFSET); + if (on_event != 3) { + priv->on_event = on_event; + val |= BIT(on_event) << LED_EVENT_ON_OFFSET; + } + + port = dev_read_u32_default(dev, "port", 0); + priv->port = port; + val &= ~(LED_PORT_MASK << LED_PORT_OFFSET); + val |= port << LED_PORT_OFFSET; + + /* force off */ + val &= ~(LED_OFF_ON_MASK << LED_OFF_ON_OFFSET); + val |= 0x3 << LED_OFF_ON_OFFSET; + + cortina_led_write(priv->regs, val); + } + + return 0; +} + +static int cortina_led_bind(struct udevice *parent) +{ + ofnode node; + + dev_for_each_subnode(node, parent) { + struct led_uc_plat *uc_plat; + struct udevice *dev; + const char *label; + int ret; + + label = ofnode_read_string(node, "label"); + if (!label) { + debug("%s: node %s has no label\n", __func__, + ofnode_get_name(node)); + return -EINVAL; + } + + ret = device_bind_driver_to_node(parent, "ca-leds", + ofnode_get_name(node), + node, &dev); + if (ret) + return ret; + uc_plat = dev_get_uclass_platdata(dev); + uc_plat->label = label; + } + + return 0; +} + +static const struct udevice_id ca_led_ids[] = { + { .compatible = "cortina,ca-leds" }, + { /* sentinel */ } +}; + +U_BOOT_DRIVER(cortina_led) = { + .name = "ca-leds", + .id = UCLASS_LED, + .of_match = ca_led_ids, + .bind = cortina_led_bind, + .probe = cortina_led_probe, + .priv_auto_alloc_size = sizeof(struct cortina_led_cfg), + .ops = &cortina_led_ops, +};