[v2,5/8] led: led_cortina: Add CAxxx LED support
diff mbox series

Message ID 1582790298-5546-6-git-send-email-alex.nemirovsky@cortina-access.com
State Superseded
Delegated to: Tom Rini
Headers show
Series
  • Cortina Access Drivers Package 2
Related show

Commit Message

Alex Nemirovsky Feb. 27, 2020, 7:58 a.m. UTC
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>
---

Changes in v2: None

 MAINTAINERS               |   2 +
 drivers/led/Kconfig       |   8 ++
 drivers/led/Makefile      |   1 +
 drivers/led/led_cortina.c | 308 ++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 319 insertions(+)
 create mode 100644 drivers/led/led_cortina.c

Patch
diff mbox series

diff --git a/MAINTAINERS b/MAINTAINERS
index b147faa..24a2655 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>
@@ -676,6 +677,7 @@  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..53435e8
--- /dev/null
+++ b/drivers/led/led_cortina.c
@@ -0,0 +1,308 @@ 
+// 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>
+#include <linux/compat.h>
+
+#define CORTINA_LED_NUM	16
+
+#define BIT(nr)			(1UL << (nr))
+
+#define cortina_LED_CONTROL			0x00
+#define cortina_LED_CONFIG_0		0x04
+#define cortina_LED_CONFIG_1		0x08
+#define cortina_LED_CONFIG_2		0x0c
+#define cortina_LED_CONFIG_3		0x10
+#define cortina_LED_CONFIG_4		0x14
+#define cortina_LED_CONFIG_5		0x18
+#define cortina_LED_CONFIG_6		0x1c
+#define cortina_LED_CONFIG_7		0x20
+#define cortina_LED_CONFIG_8		0x24
+#define cortina_LED_CONFIG_9		0x28
+#define cortina_LED_CONFIG_10		0x2c
+#define cortina_LED_CONFIG_11		0x30
+#define cortina_LED_CONFIG_12		0x34
+#define cortina_LED_CONFIG_13		0x38
+#define cortina_LED_CONFIG_14		0x3c
+#define cortina_LED_CONFIG_15		0x40
+
+#define cortina_LED_MAX_HW_BLINK		127
+#define cortina_LED_MAX_COUNT		CORTINA_LED_NUM
+#define cortina_LED_MAX_PORT		8
+
+/* LED_CONTROL fields */
+#define cortina_LED_BLINK_RATE1_OFFSET	0
+#define cortina_LED_BLINK_RATE1_MASK	0xFF
+#define cortina_LED_BLINK_RATE2_OFFSET	8
+#define cortina_LED_BLINK_RATE2_MASK	0xFF
+#define cortina_LED_CLK_TEST		BIT(16)
+#define cortina_LED_CLK_POLARITY		BIT(17)
+#define cortina_LED_CLK_TEST_MODE	BIT(16)
+#define cortina_LED_CLK_TEST_RX_TEST	BIT(30)
+#define cortina_LED_CLK_TEST_TX_TEST	BIT(31)
+
+/* LED_CONFIG fields */
+#define cortina_LED_EVENT_ON_OFFSET	0
+#define cortina_LED_EVENT_ON_MASK	0x7
+#define cortina_LED_EVENT_BLINK_OFFSET	3
+#define cortina_LED_EVENT_BLINK_MASK	0x7
+#define cortina_LED_EVENT_OFF_OFFSET	6
+#define cortina_LED_EVENT_OFF_MASK	0x7
+#define cortina_LED_OFF_ON_OFFSET	9
+#define cortina_LED_OFF_ON_MASK		0x3
+#define cortina_LED_PORT_OFFSET		11
+#define cortina_LED_PORT_MASK		0x7
+#define cortina_LED_OFF_VAL		BIT(14)
+#define cortina_LED_SW_EVENT		BIT(15)
+#define cortina_LED_BLINK_SEL		BIT(16)
+
+struct cortina_led_cfg {
+	void __iomem *regs;
+	spinlock_t *lock;	/* protect LED resource access */
+	int idx;
+	bool active_low;
+
+	int off_event;
+	int blink_event;
+	int on_event;
+	int port;
+	int blink;
+	int enable;
+};
+
+struct cortina_led_top_cfg {
+	void __iomem *regs;
+	u16 blink_rate1;
+	u16 blink_rate2;
+};
+
+static struct cortina_led_top_cfg glb_led_ctrl;
+
+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 & cortina_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 &= ~cortina_LED_SW_EVENT;
+		val &= ~(cortina_LED_OFF_ON_MASK << cortina_LED_OFF_ON_OFFSET);
+		val |= 0x3 << cortina_LED_OFF_ON_OFFSET;
+		cortina_led_write(priv->regs, val);
+		break;
+	case LEDST_ON:
+		val |= cortina_LED_SW_EVENT;
+		val &= ~(cortina_LED_OFF_ON_MASK << cortina_LED_OFF_ON_OFFSET);
+		val |= 0x1 << cortina_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);
+	void __iomem *regs;
+	u32 reg_value, val;
+	u16 rate1, rate2;
+	struct cortina_led_cfg *priv = dev_get_priv(dev);
+	unsigned int pin;
+	u32 blink, port, off_event, blink_event, on_event;
+
+	/* Top-level LED node */
+	if (!uc_plat->label) {
+		regs = dev_remap_addr(dev);
+
+	if (!regs)
+		return -EINVAL;
+
+	glb_led_ctrl.regs = regs;
+
+	reg_value = 0;
+	reg_value |= cortina_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;
+	glb_led_ctrl.blink_rate1 = val > cortina_LED_MAX_HW_BLINK ?
+			    cortina_LED_MAX_HW_BLINK : val;
+	reg_value |= (glb_led_ctrl.blink_rate1 & cortina_LED_BLINK_RATE1_MASK)
+			<< cortina_LED_BLINK_RATE1_OFFSET;
+
+	val = rate2 / 16 - 1;
+	glb_led_ctrl.blink_rate2 = val > cortina_LED_MAX_HW_BLINK ?
+				cortina_LED_MAX_HW_BLINK : val;
+	reg_value |= (glb_led_ctrl.blink_rate2 & cortina_LED_BLINK_RATE2_MASK)
+			<< cortina_LED_BLINK_RATE2_OFFSET;
+
+	cortina_led_write(glb_led_ctrl.regs, reg_value);
+	} else {
+		regs = dev_remap_addr(dev_get_parent(dev));
+
+	if (!regs)
+		return -EINVAL;
+
+	pin = dev_read_u32_default(dev, "pin", cortina_LED_MAX_COUNT);
+
+	if (pin >= cortina_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 |= cortina_LED_OFF_VAL;
+	} else {
+		priv->active_low = false;
+		val &= ~cortina_LED_OFF_VAL;
+	}
+
+	blink = dev_read_u32_default(dev, "blink-sel", 0);
+
+	if (blink == 0) {
+		priv->blink = 0;
+		val &= ~cortina_LED_BLINK_SEL;
+	} else if (blink == 1) {
+		priv->blink = 1;
+		val |= cortina_LED_BLINK_SEL;
+	}
+
+	//Todo : cortina_led_config();
+	off_event = dev_read_u32_default(dev, "off-event", 3);
+	val &= ~(cortina_LED_EVENT_OFF_MASK << cortina_LED_EVENT_OFF_OFFSET);
+	if (off_event != 3) {
+		priv->off_event = off_event;
+		val |= BIT(off_event) << cortina_LED_EVENT_OFF_OFFSET;
+	}
+
+	blink_event = dev_read_u32_default(dev, "blink-event", 3);
+	val &= ~(cortina_LED_EVENT_BLINK_MASK <<
+		 cortina_LED_EVENT_BLINK_OFFSET);
+
+	if (blink_event != 3) {
+		priv->blink_event = blink_event;
+		val |= BIT(blink_event) << cortina_LED_EVENT_BLINK_OFFSET;
+	}
+
+	on_event = dev_read_u32_default(dev, "on-event", 3);
+	val &= ~(cortina_LED_EVENT_ON_MASK << cortina_LED_EVENT_ON_OFFSET);
+	if (on_event != 3) {
+		priv->on_event = on_event;
+		val |= BIT(on_event) << cortina_LED_EVENT_ON_OFFSET;
+	}
+
+	port = dev_read_u32_default(dev, "port", 0);
+	priv->port = port;
+	val &= ~(cortina_LED_PORT_MASK << cortina_LED_PORT_OFFSET);
+	val |= port << cortina_LED_PORT_OFFSET;
+
+	priv->enable = 0;
+
+	/* force off */
+	val &= ~(cortina_LED_OFF_ON_MASK << cortina_LED_OFF_ON_OFFSET);
+	val |= 0x3 << cortina_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,
+};