From: Mans Rullgard <mans@xxxxxxxxx>
The tango HW IR decoder supports NEC, RC-5, RC-6 protocols.
Signed-off-by: Marc Gonzalez <marc_gonzalez@xxxxxxxxxxxxxxxx>
---
drivers/media/rc/Kconfig | 9 ++
drivers/media/rc/Makefile | 1 +
drivers/media/rc/tango-ir.c | 265 ++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 275 insertions(+)
create mode 100644 drivers/media/rc/tango-ir.c
diff --git a/drivers/media/rc/Kconfig b/drivers/media/rc/Kconfig
index d9ce8ff55d0c..497c838786c8 100644
--- a/drivers/media/rc/Kconfig
+++ b/drivers/media/rc/Kconfig
@@ -469,6 +469,15 @@ config IR_SIR
To compile this driver as a module, choose M here: the module will
be called sir-ir.
+config IR_TANGO
+ tristate "Sigma Designs SMP86xx IR decoder"
+ depends on RC_CORE
+ depends on ARCH_TANGO || COMPILE_TEST
+ ---help---
+ Adds support for the HW IR decoder embedded on Sigma Designs
+ Tango-based systems (SMP86xx, SMP87xx).
+ The HW decoder supports NEC, RC-5, RC-6 IR protocols.
+
config IR_ZX
tristate "ZTE ZX IR remote control"
depends on RC_CORE
diff --git a/drivers/media/rc/Makefile b/drivers/media/rc/Makefile
index 9bc6a3980ed0..643797dc971b 100644
--- a/drivers/media/rc/Makefile
+++ b/drivers/media/rc/Makefile
@@ -44,3 +44,4 @@ obj-$(CONFIG_IR_SERIAL) += serial_ir.o
obj-$(CONFIG_IR_SIR) += sir_ir.o
obj-$(CONFIG_IR_MTK) += mtk-cir.o
obj-$(CONFIG_IR_ZX) += zx-irdec.o
+obj-$(CONFIG_IR_TANGO) += tango-ir.o
diff --git a/drivers/media/rc/tango-ir.c b/drivers/media/rc/tango-ir.c
new file mode 100644
index 000000000000..fe19fd726aba
--- /dev/null
+++ b/drivers/media/rc/tango-ir.c
@@ -0,0 +1,265 @@
+/*
+ * Copyright (C) 2015 Mans Rullgard <mans@xxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/input.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/clk.h>
+#include <linux/of.h>
+#include <media/rc-core.h>
+
+#define IR_NEC_CTRL 0x00
+#define IR_NEC_DATA 0x04
+#define IR_CTRL 0x08
+#define IR_RC5_CLK_DIV 0x0c
+#define IR_RC5_DATA 0x10
+#define IR_INT 0x14
+
+#define NEC_TIME_BASE 560
+#define RC5_TIME_BASE 1778
+
+#define RC6_CTRL 0x00
+#define RC6_CLKDIV 0x04
+#define RC6_DATA0 0x08
+#define RC6_DATA1 0x0c
+#define RC6_DATA2 0x10
+#define RC6_DATA3 0x14
+#define RC6_DATA4 0x18
+
+#define RC6_CARRIER 36000
+#define RC6_TIME_BASE 16
+
+struct tango_ir {
+ void __iomem *rc5_base;
+ void __iomem *rc6_base;
+ struct rc_dev *rc;
+ struct clk *clk;
+};
+
+static void tango_ir_handle_nec(struct tango_ir *ir)
+{
+ u32 v, code;
+ enum rc_proto proto;
+
+ v = readl_relaxed(ir->rc5_base + IR_NEC_DATA);
+ if (!v) {
+ rc_repeat(ir->rc);
+ return;
+ }
+
+ code = ir_nec_bytes_to_scancode(v, v >> 8, v >> 16, v >> 24, &proto);
+ rc_keydown(ir->rc, proto, code, 0);
+}
+
+static void tango_ir_handle_rc5(struct tango_ir *ir)
+{
+ u32 data, field, toggle, addr, cmd, code;
+
+ data = readl_relaxed(ir->rc5_base + IR_RC5_DATA);
+ if (data & BIT(31))
+ return;
+
+ field = data >> 12 & 1;
+ toggle = data >> 11 & 1;
+ addr = data >> 6 & 0x1f;
+ cmd = (data & 0x3f) | (field ^ 1) << 6;
+
+ code = RC_SCANCODE_RC5(addr, cmd);
+ rc_keydown(ir->rc, RC_PROTO_RC5, code, toggle);
+}
+
+static void tango_ir_handle_rc6(struct tango_ir *ir)
+{
+ u32 data0, data1, toggle, mode, addr, cmd, code;
+
+ data0 = readl_relaxed(ir->rc6_base + RC6_DATA0);
+ data1 = readl_relaxed(ir->rc6_base + RC6_DATA1);
+
+ mode = data0 >> 1 & 7;
+ if (mode != 0)
+ return;
+
+ toggle = data0 & 1;
+ addr = data0 >> 16;
+ cmd = data1;
+
+ code = RC_SCANCODE_RC6_0(addr, cmd);
+ rc_keydown(ir->rc, RC_PROTO_RC6_0, code, toggle);
+}
+
+static irqreturn_t tango_ir_irq(int irq, void *dev_id)
+{
+ struct tango_ir *ir = dev_id;
+ unsigned int rc5_stat;
+ unsigned int rc6_stat;
+
+ rc5_stat = readl_relaxed(ir->rc5_base + IR_INT);
+ writel_relaxed(rc5_stat, ir->rc5_base + IR_INT);
+
+ rc6_stat = readl_relaxed(ir->rc6_base + RC6_CTRL);
+ writel_relaxed(rc6_stat, ir->rc6_base + RC6_CTRL);
+
+ if (!(rc5_stat & 3) && !(rc6_stat & BIT(31)))
+ return IRQ_NONE;
+
+ if (rc5_stat & BIT(0))
+ tango_ir_handle_rc5(ir);
+
+ if (rc5_stat & BIT(1))
+ tango_ir_handle_nec(ir);
+
+ if (rc6_stat & BIT(31))
+ tango_ir_handle_rc6(ir);
+
+ return IRQ_HANDLED;
+}
+
+#define DISABLE_NEC (BIT(4) | BIT(8))
+#define ENABLE_RC5 (BIT(0) | BIT(9))
+#define ENABLE_RC6 (BIT(0) | BIT(7))
+
+static int tango_change_protocol(struct rc_dev *dev, u64 *rc_type)
+{
+ struct tango_ir *ir = dev->priv;
+ u32 rc5_ctrl = DISABLE_NEC;
+ u32 rc6_ctrl = 0;
+
+ if (*rc_type & RC_PROTO_BIT_NEC)
+ rc5_ctrl = 0;
+
+ if (*rc_type & RC_PROTO_BIT_RC5)
+ rc5_ctrl |= ENABLE_RC5;
+
+ if (*rc_type & RC_PROTO_BIT_RC6_0)
+ rc6_ctrl = ENABLE_RC6;
+
+ writel_relaxed(rc5_ctrl, ir->rc5_base + IR_CTRL);
+ writel_relaxed(rc6_ctrl, ir->rc6_base + RC6_CTRL);
+
+ return 0;
+}
+
+static int tango_ir_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct rc_dev *rc;
+ struct tango_ir *ir;
+ struct resource *rc5_res;
+ struct resource *rc6_res;
+ u64 clkrate, clkdiv;
+ int irq, err;
+
+ rc5_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!rc5_res)
+ return -EINVAL;
+
+ rc6_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (!rc6_res)
+ return -EINVAL;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq <= 0)
+ return -EINVAL;
+
+ ir = devm_kzalloc(dev, sizeof(*ir), GFP_KERNEL);
+ if (!ir)
+ return -ENOMEM;
+
+ ir->rc5_base = devm_ioremap_resource(dev, rc5_res);
+ if (IS_ERR(ir->rc5_base))
+ return PTR_ERR(ir->rc5_base);
+
+ ir->rc6_base = devm_ioremap_resource(dev, rc6_res);
+ if (IS_ERR(ir->rc6_base))
+ return PTR_ERR(ir->rc6_base);
+
+ ir->clk = devm_clk_get(dev, NULL);
+ if (IS_ERR(ir->clk))
+ return PTR_ERR(ir->clk);
+
+ rc = devm_rc_allocate_device(dev, RC_DRIVER_SCANCODE);
+ if (!rc)
+ return -ENOMEM;
+
+ rc->driver_name = rc->device_name = "tango-ir";
+ rc->input_phys = "tango-ir/input0";
+ rc->map_name = RC_MAP_EMPTY;
+ rc->allowed_protocols = RC_PROTO_BIT_RC5 | RC_PROTO_BIT_RC6_0 |
+ RC_PROTO_BIT_NEC | RC_PROTO_BIT_NECX | RC_PROTO_BIT_NEC32;
+ rc->change_protocol = tango_change_protocol;
+ rc->priv = ir;
+ ir->rc = rc;
+
+ of_property_read_string(dev->of_node, "linux,rc-map-name", &rc->map_name);
+
+ err = devm_rc_register_device(dev, rc);
+ if (err)
+ return err;
+
+ err = devm_request_irq(dev, irq, tango_ir_irq, IRQF_SHARED, dev_name(dev), ir);
+ if (err)
+ return err;
+
+ err = clk_prepare_enable(ir->clk);
+ if (err)
+ return err;
+
+ clkrate = clk_get_rate(ir->clk);
+
+ clkdiv = clkrate * NEC_TIME_BASE;
+ do_div(clkdiv, 1000000);
+
+ writel_relaxed(31 << 24 | 12 << 16 | clkdiv, ir->rc5_base + IR_NEC_CTRL);
+
+ clkdiv = clkrate * RC5_TIME_BASE;
+ do_div(clkdiv, 1000000);
+
+ writel_relaxed(0x110, ir->rc5_base + IR_CTRL);
+ writel_relaxed(clkdiv, ir->rc5_base + IR_RC5_CLK_DIV);
+ writel_relaxed(0x3, ir->rc5_base + IR_INT);
+
+ clkdiv = clkrate * RC6_TIME_BASE;
+ do_div(clkdiv, RC6_CARRIER);
+
+ writel_relaxed(0xc0000000, ir->rc6_base + RC6_CTRL);
+ writel_relaxed((clkdiv >> 2) << 18 | clkdiv, ir->rc6_base + RC6_CLKDIV);
+
+ platform_set_drvdata(pdev, ir);
+
+ return 0;
+}
+
+static int tango_ir_remove(struct platform_device *pdev)
+{
+ struct tango_ir *ir = platform_get_drvdata(pdev);
+ clk_disable_unprepare(ir->clk);
+ return 0;
+}
+
+static const struct of_device_id tango_ir_dt_ids[] = {
+ { .compatible = "sigma,smp8642-ir" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, tango_ir_dt_ids);
+
+static struct platform_driver tango_ir_driver = {
+ .probe = tango_ir_probe,
+ .remove = tango_ir_remove,
+ .driver = {
+ .name = "tango-ir",
+ .of_match_table = tango_ir_dt_ids,
+ },
+};
+module_platform_driver(tango_ir_driver);
+
+MODULE_DESCRIPTION("SMP86xx IR decoder driver");
+MODULE_AUTHOR("Mans Rullgard <mans@xxxxxxxxx>");
+MODULE_LICENSE("GPL");
--
2.11.0
