summaryrefslogtreecommitdiffstats
path: root/drivers/media/rc/ir-hix5hd2.c
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/media/rc/ir-hix5hd2.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/media/rc/ir-hix5hd2.c')
-rw-r--r--drivers/media/rc/ir-hix5hd2.c406
1 files changed, 406 insertions, 0 deletions
diff --git a/drivers/media/rc/ir-hix5hd2.c b/drivers/media/rc/ir-hix5hd2.c
new file mode 100644
index 000000000..4ff954b11
--- /dev/null
+++ b/drivers/media/rc/ir-hix5hd2.c
@@ -0,0 +1,406 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2014 Linaro Ltd.
+ * Copyright (c) 2014 HiSilicon Limited.
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+#include <media/rc-core.h>
+
+#define IR_ENABLE 0x00
+#define IR_CONFIG 0x04
+#define CNT_LEADS 0x08
+#define CNT_LEADE 0x0c
+#define CNT_SLEADE 0x10
+#define CNT0_B 0x14
+#define CNT1_B 0x18
+#define IR_BUSY 0x1c
+#define IR_DATAH 0x20
+#define IR_DATAL 0x24
+#define IR_INTM 0x28
+#define IR_INTS 0x2c
+#define IR_INTC 0x30
+#define IR_START 0x34
+
+/* interrupt mask */
+#define INTMS_SYMBRCV (BIT(24) | BIT(8))
+#define INTMS_TIMEOUT (BIT(25) | BIT(9))
+#define INTMS_OVERFLOW (BIT(26) | BIT(10))
+#define INT_CLR_OVERFLOW BIT(18)
+#define INT_CLR_TIMEOUT BIT(17)
+#define INT_CLR_RCV BIT(16)
+#define INT_CLR_RCVTIMEOUT (BIT(16) | BIT(17))
+
+#define IR_CLK_ENABLE BIT(4)
+#define IR_CLK_RESET BIT(5)
+
+/* IR_ENABLE register bits */
+#define IR_ENABLE_EN BIT(0)
+#define IR_ENABLE_EN_EXTRA BIT(8)
+
+#define IR_CFG_WIDTH_MASK 0xffff
+#define IR_CFG_WIDTH_SHIFT 16
+#define IR_CFG_FORMAT_MASK 0x3
+#define IR_CFG_FORMAT_SHIFT 14
+#define IR_CFG_INT_LEVEL_MASK 0x3f
+#define IR_CFG_INT_LEVEL_SHIFT 8
+/* only support raw mode */
+#define IR_CFG_MODE_RAW BIT(7)
+#define IR_CFG_FREQ_MASK 0x7f
+#define IR_CFG_FREQ_SHIFT 0
+#define IR_CFG_INT_THRESHOLD 1
+/* symbol start from low to high, symbol stream end at high*/
+#define IR_CFG_SYMBOL_FMT 0
+#define IR_CFG_SYMBOL_MAXWIDTH 0x3e80
+
+#define IR_HIX5HD2_NAME "hix5hd2-ir"
+
+/* Need to set extra bit for enabling IR */
+#define HIX5HD2_FLAG_EXTRA_ENABLE BIT(0)
+
+struct hix5hd2_soc_data {
+ u32 clk_reg;
+ u32 flags;
+};
+
+static const struct hix5hd2_soc_data hix5hd2_data = {
+ .clk_reg = 0x48,
+};
+
+static const struct hix5hd2_soc_data hi3796cv300_data = {
+ .clk_reg = 0x60,
+ .flags = HIX5HD2_FLAG_EXTRA_ENABLE,
+};
+
+struct hix5hd2_ir_priv {
+ int irq;
+ void __iomem *base;
+ struct device *dev;
+ struct rc_dev *rdev;
+ struct regmap *regmap;
+ struct clk *clock;
+ unsigned long rate;
+ const struct hix5hd2_soc_data *socdata;
+};
+
+static int hix5hd2_ir_clk_enable(struct hix5hd2_ir_priv *dev, bool on)
+{
+ u32 clk_reg = dev->socdata->clk_reg;
+ u32 val;
+ int ret = 0;
+
+ if (dev->regmap) {
+ regmap_read(dev->regmap, clk_reg, &val);
+ if (on) {
+ val &= ~IR_CLK_RESET;
+ val |= IR_CLK_ENABLE;
+ } else {
+ val &= ~IR_CLK_ENABLE;
+ val |= IR_CLK_RESET;
+ }
+ regmap_write(dev->regmap, clk_reg, val);
+ } else {
+ if (on)
+ ret = clk_prepare_enable(dev->clock);
+ else
+ clk_disable_unprepare(dev->clock);
+ }
+ return ret;
+}
+
+static inline void hix5hd2_ir_enable(struct hix5hd2_ir_priv *priv)
+{
+ u32 val = IR_ENABLE_EN;
+
+ if (priv->socdata->flags & HIX5HD2_FLAG_EXTRA_ENABLE)
+ val |= IR_ENABLE_EN_EXTRA;
+
+ writel_relaxed(val, priv->base + IR_ENABLE);
+}
+
+static int hix5hd2_ir_config(struct hix5hd2_ir_priv *priv)
+{
+ int timeout = 10000;
+ u32 val, rate;
+
+ hix5hd2_ir_enable(priv);
+
+ while (readl_relaxed(priv->base + IR_BUSY)) {
+ if (timeout--) {
+ udelay(1);
+ } else {
+ dev_err(priv->dev, "IR_BUSY timeout\n");
+ return -ETIMEDOUT;
+ }
+ }
+
+ /* Now only support raw mode, with symbol start from low to high */
+ rate = DIV_ROUND_CLOSEST(priv->rate, 1000000);
+ val = IR_CFG_SYMBOL_MAXWIDTH & IR_CFG_WIDTH_MASK << IR_CFG_WIDTH_SHIFT;
+ val |= IR_CFG_SYMBOL_FMT & IR_CFG_FORMAT_MASK << IR_CFG_FORMAT_SHIFT;
+ val |= (IR_CFG_INT_THRESHOLD - 1) & IR_CFG_INT_LEVEL_MASK
+ << IR_CFG_INT_LEVEL_SHIFT;
+ val |= IR_CFG_MODE_RAW;
+ val |= (rate - 1) & IR_CFG_FREQ_MASK << IR_CFG_FREQ_SHIFT;
+ writel_relaxed(val, priv->base + IR_CONFIG);
+
+ writel_relaxed(0x00, priv->base + IR_INTM);
+ /* write arbitrary value to start */
+ writel_relaxed(0x01, priv->base + IR_START);
+ return 0;
+}
+
+static int hix5hd2_ir_open(struct rc_dev *rdev)
+{
+ struct hix5hd2_ir_priv *priv = rdev->priv;
+ int ret;
+
+ ret = hix5hd2_ir_clk_enable(priv, true);
+ if (ret)
+ return ret;
+
+ ret = hix5hd2_ir_config(priv);
+ if (ret) {
+ hix5hd2_ir_clk_enable(priv, false);
+ return ret;
+ }
+ return 0;
+}
+
+static void hix5hd2_ir_close(struct rc_dev *rdev)
+{
+ struct hix5hd2_ir_priv *priv = rdev->priv;
+
+ hix5hd2_ir_clk_enable(priv, false);
+}
+
+static irqreturn_t hix5hd2_ir_rx_interrupt(int irq, void *data)
+{
+ u32 symb_num, symb_val, symb_time;
+ u32 data_l, data_h;
+ u32 irq_sr, i;
+ struct hix5hd2_ir_priv *priv = data;
+
+ irq_sr = readl_relaxed(priv->base + IR_INTS);
+ if (irq_sr & INTMS_OVERFLOW) {
+ /*
+ * we must read IR_DATAL first, then we can clean up
+ * IR_INTS availably since logic would not clear
+ * fifo when overflow, drv do the job
+ */
+ ir_raw_event_overflow(priv->rdev);
+ symb_num = readl_relaxed(priv->base + IR_DATAH);
+ for (i = 0; i < symb_num; i++)
+ readl_relaxed(priv->base + IR_DATAL);
+
+ writel_relaxed(INT_CLR_OVERFLOW, priv->base + IR_INTC);
+ dev_info(priv->dev, "overflow, level=%d\n",
+ IR_CFG_INT_THRESHOLD);
+ }
+
+ if ((irq_sr & INTMS_SYMBRCV) || (irq_sr & INTMS_TIMEOUT)) {
+ struct ir_raw_event ev = {};
+
+ symb_num = readl_relaxed(priv->base + IR_DATAH);
+ for (i = 0; i < symb_num; i++) {
+ symb_val = readl_relaxed(priv->base + IR_DATAL);
+ data_l = ((symb_val & 0xffff) * 10);
+ data_h = ((symb_val >> 16) & 0xffff) * 10;
+ symb_time = (data_l + data_h) / 10;
+
+ ev.duration = data_l;
+ ev.pulse = true;
+ ir_raw_event_store(priv->rdev, &ev);
+
+ if (symb_time < IR_CFG_SYMBOL_MAXWIDTH) {
+ ev.duration = data_h;
+ ev.pulse = false;
+ ir_raw_event_store(priv->rdev, &ev);
+ } else {
+ ir_raw_event_set_idle(priv->rdev, true);
+ }
+ }
+
+ if (irq_sr & INTMS_SYMBRCV)
+ writel_relaxed(INT_CLR_RCV, priv->base + IR_INTC);
+ if (irq_sr & INTMS_TIMEOUT)
+ writel_relaxed(INT_CLR_TIMEOUT, priv->base + IR_INTC);
+ }
+
+ /* Empty software fifo */
+ ir_raw_event_handle(priv->rdev);
+ return IRQ_HANDLED;
+}
+
+static const struct of_device_id hix5hd2_ir_table[] = {
+ { .compatible = "hisilicon,hix5hd2-ir", &hix5hd2_data, },
+ { .compatible = "hisilicon,hi3796cv300-ir", &hi3796cv300_data, },
+ {},
+};
+MODULE_DEVICE_TABLE(of, hix5hd2_ir_table);
+
+static int hix5hd2_ir_probe(struct platform_device *pdev)
+{
+ struct rc_dev *rdev;
+ struct device *dev = &pdev->dev;
+ struct hix5hd2_ir_priv *priv;
+ struct device_node *node = pdev->dev.of_node;
+ const struct of_device_id *of_id;
+ const char *map_name;
+ int ret;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ of_id = of_match_device(hix5hd2_ir_table, dev);
+ if (!of_id) {
+ dev_err(dev, "Unable to initialize IR data\n");
+ return -ENODEV;
+ }
+ priv->socdata = of_id->data;
+
+ priv->regmap = syscon_regmap_lookup_by_phandle(node,
+ "hisilicon,power-syscon");
+ if (IS_ERR(priv->regmap)) {
+ dev_info(dev, "no power-reg\n");
+ priv->regmap = NULL;
+ }
+
+ priv->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(priv->base))
+ return PTR_ERR(priv->base);
+
+ priv->irq = platform_get_irq(pdev, 0);
+ if (priv->irq < 0)
+ return priv->irq;
+
+ rdev = rc_allocate_device(RC_DRIVER_IR_RAW);
+ if (!rdev)
+ return -ENOMEM;
+
+ priv->clock = devm_clk_get(dev, NULL);
+ if (IS_ERR(priv->clock)) {
+ dev_err(dev, "clock not found\n");
+ ret = PTR_ERR(priv->clock);
+ goto err;
+ }
+ ret = clk_prepare_enable(priv->clock);
+ if (ret)
+ goto err;
+ priv->rate = clk_get_rate(priv->clock);
+
+ rdev->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER;
+ rdev->priv = priv;
+ rdev->open = hix5hd2_ir_open;
+ rdev->close = hix5hd2_ir_close;
+ rdev->driver_name = IR_HIX5HD2_NAME;
+ map_name = of_get_property(node, "linux,rc-map-name", NULL);
+ rdev->map_name = map_name ?: RC_MAP_EMPTY;
+ rdev->device_name = IR_HIX5HD2_NAME;
+ rdev->input_phys = IR_HIX5HD2_NAME "/input0";
+ rdev->input_id.bustype = BUS_HOST;
+ rdev->input_id.vendor = 0x0001;
+ rdev->input_id.product = 0x0001;
+ rdev->input_id.version = 0x0100;
+ rdev->rx_resolution = 10;
+ rdev->timeout = IR_CFG_SYMBOL_MAXWIDTH * 10;
+
+ ret = rc_register_device(rdev);
+ if (ret < 0)
+ goto clkerr;
+
+ if (devm_request_irq(dev, priv->irq, hix5hd2_ir_rx_interrupt,
+ 0, pdev->name, priv) < 0) {
+ dev_err(dev, "IRQ %d register failed\n", priv->irq);
+ ret = -EINVAL;
+ goto regerr;
+ }
+
+ priv->rdev = rdev;
+ priv->dev = dev;
+ platform_set_drvdata(pdev, priv);
+
+ return ret;
+
+regerr:
+ rc_unregister_device(rdev);
+ rdev = NULL;
+clkerr:
+ clk_disable_unprepare(priv->clock);
+err:
+ rc_free_device(rdev);
+ dev_err(dev, "Unable to register device (%d)\n", ret);
+ return ret;
+}
+
+static int hix5hd2_ir_remove(struct platform_device *pdev)
+{
+ struct hix5hd2_ir_priv *priv = platform_get_drvdata(pdev);
+
+ clk_disable_unprepare(priv->clock);
+ rc_unregister_device(priv->rdev);
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int hix5hd2_ir_suspend(struct device *dev)
+{
+ struct hix5hd2_ir_priv *priv = dev_get_drvdata(dev);
+
+ clk_disable_unprepare(priv->clock);
+ hix5hd2_ir_clk_enable(priv, false);
+
+ return 0;
+}
+
+static int hix5hd2_ir_resume(struct device *dev)
+{
+ struct hix5hd2_ir_priv *priv = dev_get_drvdata(dev);
+ int ret;
+
+ ret = hix5hd2_ir_clk_enable(priv, true);
+ if (ret)
+ return ret;
+
+ ret = clk_prepare_enable(priv->clock);
+ if (ret) {
+ hix5hd2_ir_clk_enable(priv, false);
+ return ret;
+ }
+
+ hix5hd2_ir_enable(priv);
+
+ writel_relaxed(0x00, priv->base + IR_INTM);
+ writel_relaxed(0xff, priv->base + IR_INTC);
+ writel_relaxed(0x01, priv->base + IR_START);
+
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(hix5hd2_ir_pm_ops, hix5hd2_ir_suspend,
+ hix5hd2_ir_resume);
+
+static struct platform_driver hix5hd2_ir_driver = {
+ .driver = {
+ .name = IR_HIX5HD2_NAME,
+ .of_match_table = hix5hd2_ir_table,
+ .pm = &hix5hd2_ir_pm_ops,
+ },
+ .probe = hix5hd2_ir_probe,
+ .remove = hix5hd2_ir_remove,
+};
+
+module_platform_driver(hix5hd2_ir_driver);
+
+MODULE_DESCRIPTION("IR controller driver for hix5hd2 platforms");
+MODULE_AUTHOR("Guoxiong Yan <yanguoxiong@huawei.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:hix5hd2-ir");