Adding upstream version 6.1.76.upstream/6.1.76

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

1 files changed, 192 insertions, 0 deletions

diff --git a/drivers/media/rc/img-ir/img-ir-core.c b/drivers/media/rc/img-ir/img-ir-core.c
new file mode 100644
index 000000000..6f8464872
--- /dev/null
+++ b/drivers/media/rc/img-ir/img-ir-core.c
@@ -0,0 +1,192 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * ImgTec IR Decoder found in PowerDown Controller.
+ *
+ * Copyright 2010-2014 Imagination Technologies Ltd.
+ *
+ * This contains core img-ir code for setting up the driver. The two interfaces
+ * (raw and hardware decode) are handled separately.
+ */
+
+#include <linux/clk.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include "img-ir.h"
+
+static irqreturn_t img_ir_isr(int irq, void *dev_id)
+{
+	struct img_ir_priv *priv = dev_id;
+	u32 irq_status;
+
+	spin_lock(&priv->lock);
+	/* we have to clear irqs before reading */
+	irq_status = img_ir_read(priv, IMG_IR_IRQ_STATUS);
+	img_ir_write(priv, IMG_IR_IRQ_CLEAR, irq_status);
+
+	/* don't handle valid data irqs if we're only interested in matches */
+	irq_status &= img_ir_read(priv, IMG_IR_IRQ_ENABLE);
+
+	/* hand off edge interrupts to raw decode handler */
+	if (irq_status & IMG_IR_IRQ_EDGE && img_ir_raw_enabled(&priv->raw))
+		img_ir_isr_raw(priv, irq_status);
+
+	/* hand off hardware match interrupts to hardware decode handler */
+	if (irq_status & (IMG_IR_IRQ_DATA_MATCH |
+			  IMG_IR_IRQ_DATA_VALID |
+			  IMG_IR_IRQ_DATA2_VALID) &&
+	    img_ir_hw_enabled(&priv->hw))
+		img_ir_isr_hw(priv, irq_status);
+
+	spin_unlock(&priv->lock);
+	return IRQ_HANDLED;
+}
+
+static void img_ir_setup(struct img_ir_priv *priv)
+{
+	/* start off with interrupts disabled */
+	img_ir_write(priv, IMG_IR_IRQ_ENABLE, 0);
+
+	img_ir_setup_raw(priv);
+	img_ir_setup_hw(priv);
+
+	if (!IS_ERR(priv->clk))
+		clk_prepare_enable(priv->clk);
+}
+
+static void img_ir_ident(struct img_ir_priv *priv)
+{
+	u32 core_rev = img_ir_read(priv, IMG_IR_CORE_REV);
+
+	dev_info(priv->dev,
+		 "IMG IR Decoder (%d.%d.%d.%d) probed successfully\n",
+		 (core_rev & IMG_IR_DESIGNER) >> IMG_IR_DESIGNER_SHIFT,
+		 (core_rev & IMG_IR_MAJOR_REV) >> IMG_IR_MAJOR_REV_SHIFT,
+		 (core_rev & IMG_IR_MINOR_REV) >> IMG_IR_MINOR_REV_SHIFT,
+		 (core_rev & IMG_IR_MAINT_REV) >> IMG_IR_MAINT_REV_SHIFT);
+	dev_info(priv->dev, "Modes:%s%s\n",
+		 img_ir_hw_enabled(&priv->hw) ? " hardware" : "",
+		 img_ir_raw_enabled(&priv->raw) ? " raw" : "");
+}
+
+static int img_ir_probe(struct platform_device *pdev)
+{
+	struct img_ir_priv *priv;
+	int irq, error, error2;
+
+	/* Get resources from platform device */
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return irq;
+
+	/* Private driver data */
+	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, priv);
+	priv->dev = &pdev->dev;
+	spin_lock_init(&priv->lock);
+
+	/* Ioremap the registers */
+	priv->reg_base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(priv->reg_base))
+		return PTR_ERR(priv->reg_base);
+
+	/* Get core clock */
+	priv->clk = devm_clk_get(&pdev->dev, "core");
+	if (IS_ERR(priv->clk))
+		dev_warn(&pdev->dev, "cannot get core clock resource\n");
+
+	/* Get sys clock */
+	priv->sys_clk = devm_clk_get(&pdev->dev, "sys");
+	if (IS_ERR(priv->sys_clk))
+		dev_warn(&pdev->dev, "cannot get sys clock resource\n");
+	/*
+	 * Enabling the system clock before the register interface is
+	 * accessed. ISR shouldn't get called with Sys Clock disabled,
+	 * hence exiting probe with an error.
+	 */
+	if (!IS_ERR(priv->sys_clk)) {
+		error = clk_prepare_enable(priv->sys_clk);
+		if (error) {
+			dev_err(&pdev->dev, "cannot enable sys clock\n");
+			return error;
+		}
+	}
+
+	/* Set up raw & hw decoder */
+	error = img_ir_probe_raw(priv);
+	error2 = img_ir_probe_hw(priv);
+	if (error && error2) {
+		if (error == -ENODEV)
+			error = error2;
+		goto err_probe;
+	}
+
+	/* Get the IRQ */
+	priv->irq = irq;
+	error = request_irq(priv->irq, img_ir_isr, 0, "img-ir", priv);
+	if (error) {
+		dev_err(&pdev->dev, "cannot register IRQ %u\n",
+			priv->irq);
+		error = -EIO;
+		goto err_irq;
+	}
+
+	img_ir_ident(priv);
+	img_ir_setup(priv);
+
+	return 0;
+
+err_irq:
+	img_ir_remove_hw(priv);
+	img_ir_remove_raw(priv);
+err_probe:
+	if (!IS_ERR(priv->sys_clk))
+		clk_disable_unprepare(priv->sys_clk);
+	return error;
+}
+
+static int img_ir_remove(struct platform_device *pdev)
+{
+	struct img_ir_priv *priv = platform_get_drvdata(pdev);
+
+	free_irq(priv->irq, priv);
+	img_ir_remove_hw(priv);
+	img_ir_remove_raw(priv);
+
+	if (!IS_ERR(priv->clk))
+		clk_disable_unprepare(priv->clk);
+	if (!IS_ERR(priv->sys_clk))
+		clk_disable_unprepare(priv->sys_clk);
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(img_ir_pmops, img_ir_suspend, img_ir_resume);
+
+static const struct of_device_id img_ir_match[] = {
+	{ .compatible = "img,ir-rev1" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, img_ir_match);
+
+static struct platform_driver img_ir_driver = {
+	.driver = {
+		.name = "img-ir",
+		.of_match_table	= img_ir_match,
+		.pm = &img_ir_pmops,
+	},
+	.probe = img_ir_probe,
+	.remove = img_ir_remove,
+};
+
+module_platform_driver(img_ir_driver);
+
+MODULE_AUTHOR("Imagination Technologies Ltd.");
+MODULE_DESCRIPTION("ImgTec IR");
+MODULE_LICENSE("GPL");