1 files changed, 112 insertions, 0 deletions

diff --git a/drivers/media/video/cx231xx/cx231xx-input.c b/drivers/media/video/cx231xx/cx231xx-input.c
new file mode 100644
index 00000000000..45e14cac462
--- /dev/null
+++ b/drivers/media/video/cx231xx/cx231xx-input.c
@@ -0,0 +1,112 @@
+/*
+ *   cx231xx IR glue driver
+ *
+ *   Copyright (C) 2010 Mauro Carvalho Chehab <mchehab@redhat.com>
+ *
+ *   Polaris (cx231xx) has its support for IR's with a design close to MCE.
+ *   however, a few designs are using an external I2C chip for IR, instead
+ *   of using the one provided by the chip.
+ *   This driver provides support for those extra devices
+ *
+ *   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 version 2.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *   General Public License for more details.
+ */
+
+#include "cx231xx.h"
+#include <linux/usb.h>
+#include <linux/slab.h>
+
+#define MODULE_NAME "cx231xx-input"
+
+static int get_key_isdbt(struct IR_i2c *ir, u32 *ir_key,
+                         u32 *ir_raw)
+{
+        u8      cmd, scancode;
+
+        dev_dbg(&ir->rc->input_dev->dev, "%s\n", __func__);
+
+                /* poll IR chip */
+        if (1 != i2c_master_recv(ir->c, &cmd, 1))
+                return -EIO;
+
+        /* it seems that 0xFE indicates that a button is still hold
+           down, while 0xff indicates that no button is hold
+           down. 0xfe sequences are sometimes interrupted by 0xFF */
+
+        if (cmd == 0xff)
+                return 0;
+
+        scancode =
+                 ((cmd & 0x01) ? 0x80 : 0) |
+                 ((cmd & 0x02) ? 0x40 : 0) |
+                 ((cmd & 0x04) ? 0x20 : 0) |
+                 ((cmd & 0x08) ? 0x10 : 0) |
+                 ((cmd & 0x10) ? 0x08 : 0) |
+                 ((cmd & 0x20) ? 0x04 : 0) |
+                 ((cmd & 0x40) ? 0x02 : 0) |
+                 ((cmd & 0x80) ? 0x01 : 0);
+
+        dev_dbg(&ir->rc->input_dev->dev, "cmd %02x, scan = %02x\n",
+                cmd, scancode);
+
+        *ir_key = scancode;
+        *ir_raw = scancode;
+        return 1;
+}
+
+int cx231xx_ir_init(struct cx231xx *dev)
+{
+        struct i2c_board_info info;
+        u8 ir_i2c_bus;
+
+        dev_dbg(&dev->udev->dev, "%s\n", __func__);
+
+        /* Only initialize if a rc keycode map is defined */
+        if (!cx231xx_boards[dev->model].rc_map_name)
+                return -ENODEV;
+
+        request_module("ir-kbd-i2c");
+
+        memset(&info, 0, sizeof(struct i2c_board_info));
+        memset(&dev->init_data, 0, sizeof(dev->init_data));
+        dev->init_data.rc_dev = rc_allocate_device();
+        if (!dev->init_data.rc_dev)
+                return -ENOMEM;
+
+        dev->init_data.name = cx231xx_boards[dev->model].name;
+
+        strlcpy(info.type, "ir_video", I2C_NAME_SIZE);
+        info.platform_data = &dev->init_data;
+
+        /*
+         * Board-dependent values
+         *
+         * For now, there's just one type of hardware design using
+         * an i2c device.
+         */
+        dev->init_data.get_key = get_key_isdbt;
+        dev->init_data.ir_codes = cx231xx_boards[dev->model].rc_map_name;
+        /* The i2c micro-controller only outputs the cmd part of NEC protocol */
+        dev->init_data.rc_dev->scanmask = 0xff;
+        dev->init_data.rc_dev->driver_name = "cx231xx";
+        dev->init_data.type = RC_TYPE_NEC;
+        info.addr = 0x30;
+
+        /* Load and bind ir-kbd-i2c */
+        ir_i2c_bus = cx231xx_boards[dev->model].ir_i2c_master;
+        dev_dbg(&dev->udev->dev, "Trying to bind ir at bus %d, addr 0x%02x\n",
+                ir_i2c_bus, info.addr);
+        i2c_new_device(&dev->i2c_bus[ir_i2c_bus].i2c_adap, &info);
+
+        return 0;
+}
+
+void cx231xx_ir_exit(struct cx231xx *dev)
+{
+}