[PATCH 2/2] rc: add zx-irdec remote control driver
Shawn Guo
shawnguo at kernel.org
Fri Jul 28 23:31:42 PDT 2017
From: Shawn Guo <shawn.guo at linaro.org>
It adds the remote control driver and corresponding keymap file for
IRDEC block found on ZTE ZX family SoCs.
Signed-off-by: Shawn Guo <shawn.guo at linaro.org>
---
drivers/media/rc/Kconfig | 11 ++
drivers/media/rc/Makefile | 1 +
drivers/media/rc/keymaps/Makefile | 3 +-
drivers/media/rc/keymaps/rc-zx-irdec.c | 79 +++++++++++++
drivers/media/rc/zx-irdec.c | 198 +++++++++++++++++++++++++++++++++
include/media/rc-map.h | 1 +
6 files changed, 292 insertions(+), 1 deletion(-)
create mode 100644 drivers/media/rc/keymaps/rc-zx-irdec.c
create mode 100644 drivers/media/rc/zx-irdec.c
diff --git a/drivers/media/rc/Kconfig b/drivers/media/rc/Kconfig
index 5e83b76495f7..c572d5da4b5f 100644
--- a/drivers/media/rc/Kconfig
+++ b/drivers/media/rc/Kconfig
@@ -435,4 +435,15 @@ config IR_SIR
To compile this driver as a module, choose M here: the module will
be called sir-ir.
+config IR_ZX
+ tristate "ZTE ZX IR remote control"
+ depends on RC_CORE
+ depends on ARCH_ZX || COMPILE_TEST
+ ---help---
+ Say Y if you want to use the IR remote control available
+ on ZTE ZX family SoCs.
+
+ To compile this driver as a module, choose M here: the
+ module will be called zx-irdec.
+
endif #RC_DEVICES
diff --git a/drivers/media/rc/Makefile b/drivers/media/rc/Makefile
index 245e2c2d0b22..922c1a5620e9 100644
--- a/drivers/media/rc/Makefile
+++ b/drivers/media/rc/Makefile
@@ -41,3 +41,4 @@ obj-$(CONFIG_IR_IMG) += img-ir/
obj-$(CONFIG_IR_SERIAL) += serial_ir.o
obj-$(CONFIG_IR_SIR) += sir_ir.o
obj-$(CONFIG_IR_MTK) += mtk-cir.o
+obj-$(CONFIG_IR_ZX) += zx-irdec.o
diff --git a/drivers/media/rc/keymaps/Makefile b/drivers/media/rc/keymaps/Makefile
index 2945f99907b5..af6496d709fb 100644
--- a/drivers/media/rc/keymaps/Makefile
+++ b/drivers/media/rc/keymaps/Makefile
@@ -109,4 +109,5 @@ obj-$(CONFIG_RC_MAP) += rc-adstech-dvb-t-pci.o \
rc-videomate-tv-pvr.o \
rc-winfast.o \
rc-winfast-usbii-deluxe.o \
- rc-su3000.o
+ rc-su3000.o \
+ rc-zx-irdec.o
diff --git a/drivers/media/rc/keymaps/rc-zx-irdec.c b/drivers/media/rc/keymaps/rc-zx-irdec.c
new file mode 100644
index 000000000000..cc889df47eb8
--- /dev/null
+++ b/drivers/media/rc/keymaps/rc-zx-irdec.c
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2017 Sanechips Technology Co., Ltd.
+ * Copyright 2017 Linaro Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <media/rc-map.h>
+
+static struct rc_map_table zx_irdec_table[] = {
+ { 0x01, KEY_1 },
+ { 0x02, KEY_2 },
+ { 0x03, KEY_3 },
+ { 0x04, KEY_4 },
+ { 0x05, KEY_5 },
+ { 0x06, KEY_6 },
+ { 0x07, KEY_7 },
+ { 0x08, KEY_8 },
+ { 0x09, KEY_9 },
+ { 0x31, KEY_0 },
+ { 0x16, KEY_DELETE },
+ { 0x0a, KEY_MODE }, /* Input method */
+ { 0x0c, KEY_VOLUMEUP },
+ { 0x18, KEY_VOLUMEDOWN },
+ { 0x0b, KEY_CHANNELUP },
+ { 0x15, KEY_CHANNELDOWN },
+ { 0x0d, KEY_PAGEUP },
+ { 0x13, KEY_PAGEDOWN },
+ { 0x46, KEY_FASTFORWARD },
+ { 0x43, KEY_REWIND },
+ { 0x44, KEY_PLAYPAUSE },
+ { 0x45, KEY_STOP },
+ { 0x49, KEY_OK },
+ { 0x47, KEY_UP },
+ { 0x4b, KEY_DOWN },
+ { 0x48, KEY_LEFT },
+ { 0x4a, KEY_RIGHT },
+ { 0x4d, KEY_MENU },
+ { 0x56, KEY_APPSELECT }, /* Application */
+ { 0x4c, KEY_BACK },
+ { 0x1e, KEY_INFO },
+ { 0x4e, KEY_F1 },
+ { 0x4f, KEY_F2 },
+ { 0x50, KEY_F3 },
+ { 0x51, KEY_F4 },
+ { 0x1c, KEY_AUDIO },
+ { 0x12, KEY_MUTE },
+ { 0x11, KEY_DOT }, /* Location */
+ { 0x1d, KEY_SETUP },
+ { 0x40, KEY_POWER },
+};
+
+static struct rc_map_list zx_irdec_map = {
+ .map = {
+ .scan = zx_irdec_table,
+ .size = ARRAY_SIZE(zx_irdec_table),
+ .rc_type = RC_TYPE_NEC,
+ .name = RC_MAP_ZX_IRDEC,
+ }
+};
+
+static int __init init_rc_map_zx_irdec(void)
+{
+ return rc_map_register(&zx_irdec_map);
+}
+
+static void __exit exit_rc_map_zx_irdec(void)
+{
+ rc_map_unregister(&zx_irdec_map);
+}
+
+module_init(init_rc_map_zx_irdec)
+module_exit(exit_rc_map_zx_irdec)
+
+MODULE_AUTHOR("Shawn Guo <shawn.guo at linaro.org>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/media/rc/zx-irdec.c b/drivers/media/rc/zx-irdec.c
new file mode 100644
index 000000000000..bc68c54a910e
--- /dev/null
+++ b/drivers/media/rc/zx-irdec.c
@@ -0,0 +1,198 @@
+/*
+ * Copyright (C) 2017 Sanechips Technology Co., Ltd.
+ * Copyright 2017 Linaro Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+
+#include <media/rc-core.h>
+
+#define DRIVER_NAME "zx-irdec"
+
+#define ZX_IR_ENABLE 0x04
+#define ZX_IREN BIT(0)
+#define ZX_IR_CTRL 0x08
+#define ZX_DEGL_MASK GENMASK(21, 20)
+#define ZX_DEGL_VALUE(x) (((x) << 20) & ZX_DEGL_MASK)
+#define ZX_WDBEGIN_MASK GENMASK(18, 8)
+#define ZX_WDBEGIN_VALUE(x) (((x) << 8) & ZX_WDBEGIN_MASK)
+#define ZX_IR_INTEN 0x10
+#define ZX_IR_INTSTCLR 0x14
+#define ZX_IR_CODE 0x30
+#define ZX_IR_CNUM 0x34
+#define ZX_NECRPT BIT(16)
+
+struct zx_irdec {
+ void __iomem *base;
+ struct rc_dev *rcd;
+ struct device *dev;
+};
+
+static void zx_irdec_set_mask(struct zx_irdec *irdec, unsigned int reg,
+ u32 mask, u32 value)
+{
+ u32 data;
+
+ data = readl(irdec->base + reg);
+ data &= ~mask;
+ data |= value & mask;
+ writel(data, irdec->base + reg);
+}
+
+static irqreturn_t zx_irdec_irq(int irq, void *dev_id)
+{
+ struct zx_irdec *irdec = dev_id;
+ struct device *dev = irdec->dev;
+ u8 address, not_address;
+ u8 command, not_command;
+ u32 rawcode, scancode;
+ enum rc_type rc_type;
+
+ /* Clear interrupt */
+ writel(1, irdec->base + ZX_IR_INTSTCLR);
+
+ /* Check repeat frame */
+ if (readl(irdec->base + ZX_IR_CNUM) & ZX_NECRPT) {
+ rc_repeat(irdec->rcd);
+ goto done;
+ }
+
+ rawcode = readl(irdec->base + ZX_IR_CODE);
+ not_command = (rawcode >> 24) & 0xff;
+ command = (rawcode >> 16) & 0xff;
+ not_address = (rawcode >> 8) & 0xff;
+ address = rawcode & 0xff;
+
+ if ((command ^ not_command) != 0xff) {
+ dev_err(dev, "checksum error: received 0x%08x\n", rawcode);
+ goto done;
+ }
+
+ if ((address ^ not_address) != 0xff) {
+ /* Extended NEC */
+ scancode = RC_SCANCODE_NECX(address, command);
+ rc_type = RC_TYPE_NECX;
+ } else {
+ /* Normal NEC */
+ scancode = RC_SCANCODE_NEC(address, command);
+ rc_type = RC_TYPE_NEC;
+ }
+
+ rc_keydown(irdec->rcd, rc_type, scancode, 0);
+
+done:
+ return IRQ_HANDLED;
+}
+
+static int zx_irdec_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct zx_irdec *irdec;
+ struct resource *res;
+ struct rc_dev *rcd;
+ int irq;
+ int ret;
+
+ irdec = devm_kzalloc(dev, sizeof(*irdec), GFP_KERNEL);
+ if (!irdec)
+ return -ENOMEM;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ irdec->base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(irdec->base))
+ return PTR_ERR(irdec->base);
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ rcd = devm_rc_allocate_device(dev, RC_DRIVER_SCANCODE);
+ if (!rcd) {
+ dev_err(dev, "failed to allocate rc device\n");
+ return -ENOMEM;
+ }
+
+ irdec->rcd = rcd;
+ irdec->dev = dev;
+
+ rcd->priv = irdec;
+ rcd->input_name = DRIVER_NAME;
+ rcd->input_phys = DRIVER_NAME "/input0";
+ rcd->input_id.bustype = BUS_HOST;
+ rcd->map_name = RC_MAP_ZX_IRDEC;
+ rcd->allowed_protocols = RC_BIT_NEC | RC_BIT_NECX;
+ rcd->driver_name = DRIVER_NAME;
+
+ platform_set_drvdata(pdev, irdec);
+
+ ret = devm_rc_register_device(dev, rcd);
+ if (ret) {
+ dev_err(dev, "failed to register rc device\n");
+ return ret;
+ }
+
+ ret = devm_request_irq(dev, irq, zx_irdec_irq, 0, NULL, irdec);
+ if (ret) {
+ dev_err(dev, "failed to request irq\n");
+ return ret;
+ }
+
+ /*
+ * Initialize deglitch level and watchdog counter beginner as
+ * recommended by vendor BSP code.
+ */
+ zx_irdec_set_mask(irdec, ZX_IR_CTRL, ZX_DEGL_MASK, ZX_DEGL_VALUE(0));
+ zx_irdec_set_mask(irdec, ZX_IR_CTRL, ZX_WDBEGIN_MASK,
+ ZX_WDBEGIN_VALUE(0x21c));
+
+ /* Enable interrupt */
+ writel(1, irdec->base + ZX_IR_INTEN);
+
+ /* Enable the decoder */
+ zx_irdec_set_mask(irdec, ZX_IR_ENABLE, ZX_IREN, ZX_IREN);
+
+ return 0;
+}
+
+static int zx_irdec_remove(struct platform_device *pdev)
+{
+ struct zx_irdec *irdec = platform_get_drvdata(pdev);
+
+ /* Disable the decoder */
+ zx_irdec_set_mask(irdec, ZX_IR_ENABLE, ZX_IREN, 0);
+
+ /* Disable interrupt */
+ writel(0, irdec->base + ZX_IR_INTEN);
+
+ return 0;
+}
+
+static const struct of_device_id zx_irdec_match[] = {
+ { .compatible = "zte,zx296718-irdec" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, zx_irdec_match);
+
+static struct platform_driver zx_irdec_driver = {
+ .probe = zx_irdec_probe,
+ .remove = zx_irdec_remove,
+ .driver = {
+ .name = DRIVER_NAME,
+ .of_match_table = zx_irdec_match,
+ },
+};
+module_platform_driver(zx_irdec_driver);
+
+MODULE_DESCRIPTION("ZTE ZX IR remote control driver");
+MODULE_AUTHOR("Shawn Guo <shawn.guo at linaro.org>");
+MODULE_LICENSE("GPL v2");
diff --git a/include/media/rc-map.h b/include/media/rc-map.h
index 1a815a572fa1..c69482852f29 100644
--- a/include/media/rc-map.h
+++ b/include/media/rc-map.h
@@ -313,6 +313,7 @@ struct rc_map_list {
#define RC_MAP_WINFAST "rc-winfast"
#define RC_MAP_WINFAST_USBII_DELUXE "rc-winfast-usbii-deluxe"
#define RC_MAP_SU3000 "rc-su3000"
+#define RC_MAP_ZX_IRDEC "rc-zx-irdec"
/*
* Please, do not just append newer Remote Controller names at the end.
--
1.9.1
More information about the linux-arm-kernel
mailing list