diff options
Diffstat (limited to 'drivers/media/video/cx231xx/cx231xx-input.c')
| -rw-r--r-- | drivers/media/video/cx231xx/cx231xx-input.c | 222 |
1 files changed, 0 insertions, 222 deletions
diff --git a/drivers/media/video/cx231xx/cx231xx-input.c b/drivers/media/video/cx231xx/cx231xx-input.c deleted file mode 100644 index fd09915..0000000 --- a/drivers/media/video/cx231xx/cx231xx-input.c +++ /dev/null @@ -1,222 +0,0 @@ -/* - handle cx231xx IR remotes via linux kernel input layer. - - Copyright (C) 2008 <srinivasa.deevi at conexant dot com> - Based on em28xx driver - - < This is a place holder for IR now.> - - 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; either version 2 of the License, or - (at your option) any later version. - - 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. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/delay.h> -#include <linux/interrupt.h> -#include <linux/input.h> -#include <linux/usb.h> -#include <linux/slab.h> - -#include "cx231xx.h" - -static unsigned int ir_debug; -module_param(ir_debug, int, 0644); -MODULE_PARM_DESC(ir_debug, "enable debug messages [IR]"); - -#define MODULE_NAME "cx231xx" - -#define i2cdprintk(fmt, arg...) \ - if (ir_debug) { \ - printk(KERN_DEBUG "%s/ir: " fmt, ir->name , ## arg); \ - } - -#define dprintk(fmt, arg...) \ - if (ir_debug) { \ - printk(KERN_DEBUG "%s/ir: " fmt, ir->name , ## arg); \ - } - -/********************************************************** - Polling structure used by cx231xx IR's - **********************************************************/ - -struct cx231xx_ir_poll_result { - unsigned int toggle_bit:1; - unsigned int read_count:7; - u8 rc_address; - u8 rc_data[4]; -}; - -struct cx231xx_IR { - struct cx231xx *dev; - struct input_dev *input; - char name[32]; - char phys[32]; - - /* poll external decoder */ - int polling; - struct work_struct work; - struct timer_list timer; - unsigned int last_readcount; - - int (*get_key) (struct cx231xx_IR *, struct cx231xx_ir_poll_result *); -}; - -/********************************************************** - Polling code for cx231xx - **********************************************************/ - -static void cx231xx_ir_handle_key(struct cx231xx_IR *ir) -{ - int result; - struct cx231xx_ir_poll_result poll_result; - - /* read the registers containing the IR status */ - result = ir->get_key(ir, &poll_result); - if (result < 0) { - dprintk("ir->get_key() failed %d\n", result); - return; - } - - dprintk("ir->get_key result tb=%02x rc=%02x lr=%02x data=%02x\n", - poll_result.toggle_bit, poll_result.read_count, - ir->last_readcount, poll_result.rc_data[0]); - - if (poll_result.read_count > 0 && - poll_result.read_count != ir->last_readcount) - ir_keydown(ir->input, - poll_result.rc_data[0], - poll_result.toggle_bit); - - if (ir->dev->chip_id == CHIP_ID_EM2874) - /* The em2874 clears the readcount field every time the - register is read. The em2860/2880 datasheet says that it - is supposed to clear the readcount, but it doesn't. So with - the em2874, we are looking for a non-zero read count as - opposed to a readcount that is incrementing */ - ir->last_readcount = 0; - else - ir->last_readcount = poll_result.read_count; - - } -} - -static void ir_timer(unsigned long data) -{ - struct cx231xx_IR *ir = (struct cx231xx_IR *)data; - - schedule_work(&ir->work); -} - -static void cx231xx_ir_work(struct work_struct *work) -{ - struct cx231xx_IR *ir = container_of(work, struct cx231xx_IR, work); - - cx231xx_ir_handle_key(ir); - mod_timer(&ir->timer, jiffies + msecs_to_jiffies(ir->polling)); -} - -void cx231xx_ir_start(struct cx231xx_IR *ir) -{ - setup_timer(&ir->timer, ir_timer, (unsigned long)ir); - INIT_WORK(&ir->work, cx231xx_ir_work); - schedule_work(&ir->work); -} - -static void cx231xx_ir_stop(struct cx231xx_IR *ir) -{ - del_timer_sync(&ir->timer); - flush_scheduled_work(); -} - -int cx231xx_ir_init(struct cx231xx *dev) -{ - struct cx231xx_IR *ir; - struct input_dev *input_dev; - u8 ir_config; - int err = -ENOMEM; - - if (dev->board.ir_codes == NULL) { - /* No remote control support */ - return 0; - } - - ir = kzalloc(sizeof(*ir), GFP_KERNEL); - input_dev = input_allocate_device(); - if (!ir || !input_dev) - goto err_out_free; - - ir->input = input_dev; - - /* Setup the proper handler based on the chip */ - switch (dev->chip_id) { - default: - printk("Unrecognized cx231xx chip id: IR not supported\n"); - goto err_out_free; - } - - /* This is how often we ask the chip for IR information */ - ir->polling = 100; /* ms */ - - /* init input device */ - snprintf(ir->name, sizeof(ir->name), "cx231xx IR (%s)", dev->name); - - usb_make_path(dev->udev, ir->phys, sizeof(ir->phys)); - strlcat(ir->phys, "/input0", sizeof(ir->phys)); - - input_dev->name = ir->name; - input_dev->phys = ir->phys; - input_dev->id.bustype = BUS_USB; - input_dev->id.version = 1; - input_dev->id.vendor = le16_to_cpu(dev->udev->descriptor.idVendor); - input_dev->id.product = le16_to_cpu(dev->udev->descriptor.idProduct); - - input_dev->dev.parent = &dev->udev->dev; - /* record handles to ourself */ - ir->dev = dev; - dev->ir = ir; - - cx231xx_ir_start(ir); - - /* all done */ - err = __ir_input_register(ir->input, dev->board.ir_codes, - NULL, MODULE_NAME); - if (err) - goto err_out_stop; - - return 0; -err_out_stop: - cx231xx_ir_stop(ir); - dev->ir = NULL; -err_out_free: - kfree(ir); - return err; -} - -int cx231xx_ir_fini(struct cx231xx *dev) -{ - struct cx231xx_IR *ir = dev->ir; - - /* skip detach on non attached boards */ - if (!ir) - return 0; - - cx231xx_ir_stop(ir); - ir_input_unregister(ir->input); - kfree(ir); - - /* done */ - dev->ir = NULL; - return 0; -} |
