[PATCH 2/2] rc: add zx-irdec remote control driver
Sean Young
sean at mess.org
Sat Jul 29 02:51:13 PDT 2017
Hi Shawn,
The driver looks great! Just a minor point, see below.
On Sat, Jul 29, 2017 at 02:31:42PM +0800, Shawn Guo wrote:
> 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;
This case is RC_TYPE_NEC32, that could be supported too. That would make
the dev member of zx_irdec structure unnecessary.
> + }
> +
> + if ((address ^ not_address) != 0xff) {
> + /* Extended NEC */
> + scancode = RC_SCANCODE_NECX(address, command);
> + rc_type = RC_TYPE_NECX;
NECX has a 16 bit address; only 8 bits are passed here.
> + } else {
> + /* Normal NEC */
> + scancode = RC_SCANCODE_NEC(address, command);
> + rc_type = RC_TYPE_NEC;
> + }
Actually this whole nec/necx/nec32 handling is done in many drivers, maybe
it would be nice to have this in a shared function.
> +
> + 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
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