media: rc: add zx-irdec remote control driver
authorShawn Guo <shawn.guo@linaro.org>
Sun, 30 Jul 2017 13:23:13 +0000 (09:23 -0400)
committerMauro Carvalho Chehab <mchehab@s-opensource.com>
Sun, 20 Aug 2017 13:50:32 +0000 (09:50 -0400)
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>
drivers/media/rc/Kconfig
drivers/media/rc/Makefile
drivers/media/rc/keymaps/Makefile
drivers/media/rc/keymaps/rc-zx-irdec.c [new file with mode: 0644]
drivers/media/rc/zx-irdec.c [new file with mode: 0644]
include/media/rc-map.h

index d27be2516974e4f1d7855bd46ae227ea7e40aa42..d9ce8ff55d0c4ba7b49cf120c263b007a013bff2 100644 (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
index 466c40216347a7f24ca7cb6ba693c6d5f4fabecd..9bc6a3980ed01875d8bb088817c8099df9fc64c8 100644 (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-$(CONFIG_IR_ZX) += zx-irdec.o
index 2945f99907b50f3f05350c08f4c8802907b15b9d..af6496d709fb287b89396af40c2b70b0d1715bca 100644 (file)
@@ -109,4 +109,5 @@ obj-$(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
diff --git a/drivers/media/rc/keymaps/rc-zx-irdec.c b/drivers/media/rc/keymaps/rc-zx-irdec.c
new file mode 100644 (file)
index 0000000..cc889df
--- /dev/null
@@ -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");
diff --git a/drivers/media/rc/zx-irdec.c b/drivers/media/rc/zx-irdec.c
new file mode 100644 (file)
index 0000000..9452bac
--- /dev/null
@@ -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");
index 1a815a572fa184a22cdf5c3240bea59f0514de4d..c69482852f29bb967a40584ae7b2c4d75285938b 100644 (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.