Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 237 insertions, 0 deletions

diff --git a/drivers/media/rc/meson-ir.c b/drivers/media/rc/meson-ir.c
new file mode 100644
index 0000000000..70322fab34
--- /dev/null
+++ b/drivers/media/rc/meson-ir.c
@@ -0,0 +1,237 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for Amlogic Meson IR remote receiver
+ *
+ * Copyright (C) 2014 Beniamino Galvani <b.galvani@gmail.com>
+ */
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+#include <linux/bitfield.h>
+#include <linux/regmap.h>
+
+#include <media/rc-core.h>
+
+#define DRIVER_NAME		"meson-ir"
+
+#define IR_DEC_LDR_ACTIVE	0x00
+#define IR_DEC_LDR_IDLE		0x04
+#define IR_DEC_LDR_REPEAT	0x08
+#define IR_DEC_BIT_0		0x0c
+#define IR_DEC_REG0		0x10
+#define IR_DEC_REG0_BASE_TIME	GENMASK(11, 0)
+#define IR_DEC_FRAME		0x14
+#define IR_DEC_STATUS		0x18
+#define IR_DEC_STATUS_PULSE	BIT(8)
+#define IR_DEC_REG1		0x1c
+#define IR_DEC_REG1_TIME_IV	GENMASK(28, 16)
+#define IR_DEC_REG1_ENABLE	BIT(15)
+#define IR_DEC_REG1_MODE	GENMASK(8, 7)
+#define IR_DEC_REG1_IRQSEL	GENMASK(3, 2)
+#define IR_DEC_REG1_RESET	BIT(0)
+/* The following regs are only available on Meson 8b and newer */
+#define IR_DEC_REG2		0x20
+#define IR_DEC_REG2_MODE	GENMASK(3, 0)
+
+#define DEC_MODE_NEC		0x0
+#define DEC_MODE_RAW		0x2
+
+#define IRQSEL_NEC_MODE		0
+#define IRQSEL_RISE_FALL	1
+#define IRQSEL_FALL		2
+#define IRQSEL_RISE		3
+
+#define MESON_RAW_TRATE		10	/* us */
+#define MESON_HW_TRATE		20	/* us */
+
+struct meson_ir {
+	struct regmap	*reg;
+	struct rc_dev	*rc;
+	spinlock_t	lock;
+};
+
+static const struct regmap_config meson_ir_regmap_config = {
+	.reg_bits = 32,
+	.val_bits = 32,
+	.reg_stride = 4,
+};
+
+static irqreturn_t meson_ir_irq(int irqno, void *dev_id)
+{
+	struct meson_ir *ir = dev_id;
+	u32 duration, status;
+	struct ir_raw_event rawir = {};
+
+	spin_lock(&ir->lock);
+
+	regmap_read(ir->reg, IR_DEC_REG1, &duration);
+	duration = FIELD_GET(IR_DEC_REG1_TIME_IV, duration);
+	rawir.duration = duration * MESON_RAW_TRATE;
+
+	regmap_read(ir->reg, IR_DEC_STATUS, &status);
+	rawir.pulse = !!(status & IR_DEC_STATUS_PULSE);
+
+	ir_raw_event_store_with_timeout(ir->rc, &rawir);
+
+	spin_unlock(&ir->lock);
+
+	return IRQ_HANDLED;
+}
+
+static int meson_ir_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *node = dev->of_node;
+	void __iomem *res_start;
+	const char *map_name;
+	struct meson_ir *ir;
+	int irq, ret;
+
+	ir = devm_kzalloc(dev, sizeof(struct meson_ir), GFP_KERNEL);
+	if (!ir)
+		return -ENOMEM;
+
+	res_start = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(res_start))
+		return PTR_ERR(res_start);
+
+	ir->reg = devm_regmap_init_mmio(&pdev->dev, res_start,
+					&meson_ir_regmap_config);
+	if (IS_ERR(ir->reg))
+		return PTR_ERR(ir->reg);
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return irq;
+
+	ir->rc = devm_rc_allocate_device(dev, RC_DRIVER_IR_RAW);
+	if (!ir->rc) {
+		dev_err(dev, "failed to allocate rc device\n");
+		return -ENOMEM;
+	}
+
+	ir->rc->priv = ir;
+	ir->rc->device_name = DRIVER_NAME;
+	ir->rc->input_phys = DRIVER_NAME "/input0";
+	ir->rc->input_id.bustype = BUS_HOST;
+	map_name = of_get_property(node, "linux,rc-map-name", NULL);
+	ir->rc->map_name = map_name ? map_name : RC_MAP_EMPTY;
+	ir->rc->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;
+	ir->rc->rx_resolution = MESON_RAW_TRATE;
+	ir->rc->min_timeout = 1;
+	ir->rc->timeout = IR_DEFAULT_TIMEOUT;
+	ir->rc->max_timeout = 10 * IR_DEFAULT_TIMEOUT;
+	ir->rc->driver_name = DRIVER_NAME;
+
+	spin_lock_init(&ir->lock);
+	platform_set_drvdata(pdev, ir);
+
+	ret = devm_rc_register_device(dev, ir->rc);
+	if (ret) {
+		dev_err(dev, "failed to register rc device\n");
+		return ret;
+	}
+
+	ret = devm_request_irq(dev, irq, meson_ir_irq, 0, NULL, ir);
+	if (ret) {
+		dev_err(dev, "failed to request irq\n");
+		return ret;
+	}
+
+	/* Reset the decoder */
+	regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_RESET,
+			   IR_DEC_REG1_RESET);
+	regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_RESET, 0);
+
+	/* Set general operation mode (= raw/software decoding) */
+	if (of_device_is_compatible(node, "amlogic,meson6-ir"))
+		regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_MODE,
+				   FIELD_PREP(IR_DEC_REG1_MODE, DEC_MODE_RAW));
+	else
+		regmap_update_bits(ir->reg, IR_DEC_REG2, IR_DEC_REG2_MODE,
+				   FIELD_PREP(IR_DEC_REG2_MODE, DEC_MODE_RAW));
+
+	/* Set rate */
+	regmap_update_bits(ir->reg, IR_DEC_REG0, IR_DEC_REG0_BASE_TIME,
+			   FIELD_PREP(IR_DEC_REG0_BASE_TIME,
+				      MESON_RAW_TRATE - 1));
+	/* IRQ on rising and falling edges */
+	regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_IRQSEL,
+			   FIELD_PREP(IR_DEC_REG1_IRQSEL, IRQSEL_RISE_FALL));
+	/* Enable the decoder */
+	regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_ENABLE,
+			   IR_DEC_REG1_ENABLE);
+
+	dev_info(dev, "receiver initialized\n");
+
+	return 0;
+}
+
+static void meson_ir_remove(struct platform_device *pdev)
+{
+	struct meson_ir *ir = platform_get_drvdata(pdev);
+	unsigned long flags;
+
+	/* Disable the decoder */
+	spin_lock_irqsave(&ir->lock, flags);
+	regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_ENABLE, 0);
+	spin_unlock_irqrestore(&ir->lock, flags);
+}
+
+static void meson_ir_shutdown(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *node = dev->of_node;
+	struct meson_ir *ir = platform_get_drvdata(pdev);
+	unsigned long flags;
+
+	spin_lock_irqsave(&ir->lock, flags);
+
+	/*
+	 * Set operation mode to NEC/hardware decoding to give
+	 * bootloader a chance to power the system back on
+	 */
+	if (of_device_is_compatible(node, "amlogic,meson6-ir"))
+		regmap_update_bits(ir->reg, IR_DEC_REG1, IR_DEC_REG1_MODE,
+				   FIELD_PREP(IR_DEC_REG1_MODE, DEC_MODE_NEC));
+	else
+		regmap_update_bits(ir->reg, IR_DEC_REG2, IR_DEC_REG2_MODE,
+				   FIELD_PREP(IR_DEC_REG2_MODE, DEC_MODE_NEC));
+
+	/* Set rate to default value */
+	regmap_update_bits(ir->reg, IR_DEC_REG0, IR_DEC_REG0_BASE_TIME,
+			   FIELD_PREP(IR_DEC_REG0_BASE_TIME,
+				      MESON_HW_TRATE - 1));
+
+	spin_unlock_irqrestore(&ir->lock, flags);
+}
+
+static const struct of_device_id meson_ir_match[] = {
+	{ .compatible = "amlogic,meson6-ir" },
+	{ .compatible = "amlogic,meson8b-ir" },
+	{ .compatible = "amlogic,meson-gxbb-ir" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, meson_ir_match);
+
+static struct platform_driver meson_ir_driver = {
+	.probe		= meson_ir_probe,
+	.remove_new	= meson_ir_remove,
+	.shutdown	= meson_ir_shutdown,
+	.driver = {
+		.name		= DRIVER_NAME,
+		.of_match_table	= meson_ir_match,
+	},
+};
+
+module_platform_driver(meson_ir_driver);
+
+MODULE_DESCRIPTION("Amlogic Meson IR remote receiver driver");
+MODULE_AUTHOR("Beniamino Galvani <b.galvani@gmail.com>");
+MODULE_LICENSE("GPL v2");