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media: rc: add zx-irdec remote control driver

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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@linaro.org>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Shawn Guo 2017-07-30 09:23:13 -04:00 committed by Mauro Carvalho Chehab
parent 30dcb4eaea
commit b429996ced
6 changed files with 277 additions and 1 deletions
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11
drivers/media/rc/Kconfig
View file

@ -469,6 +469,17 @@ 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
endif #RC_CORE

1
drivers/media/rc/Makefile
View file

@ -43,3 +43,4 @@ 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

3
drivers/media/rc/keymaps/Makefile
View file

@ -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

79
drivers/media/rc/keymaps/rc-zx-irdec.c Normal file
View file

@ -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@linaro.org>");
MODULE_LICENSE("GPL v2");

183
drivers/media/rc/zx-irdec.c Normal file
View file

@ -0,0 +1,183 @@
/*
* 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;
};
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;
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;
scancode = ir_nec_bytes_to_scancode(address, not_address,
command, not_command,
&rc_type);
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;
rcd->priv = irdec;
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 | RC_BIT_NEC32;
rcd->driver_name = DRIVER_NAME;
rcd->device_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@linaro.org>");
MODULE_LICENSE("GPL v2");

1
include/media/rc-map.h
View file

@ -313,6 +313,7 @@ struct rc_map *rc_map_get(const char *name);
#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.