Since your KB is usb-based, u can look here for internal info:
--
Regards,
Peter Teoh
Inside there is a picture on the overall flow.
Essentially is the usb_kbd_probe() function. Your problem of linking/delinking the KB may also be answered by:
Another good ref is:
as it simplified the complex flow of USB processing in the kernel for HID part in particular.
A good analogy to your problem is the apple keyboard:
and looking into implementation drivers/hid/hid-apple.c (kernel source) perhaps can give u some insight.
Another thing is the non-kernel processing of scancode:
As describe within, X windows keymap may also be used to change the mapping.
On Fri, Jan 4, 2013 at 2:17 AM, Racz Zoli <racz.zoli@xxxxxxxxx> wrote:
Hi.I`m sorry if this isn`t the right place to post my question, but first I tried posting it on forum.kernelnewbies.org and nobody answered. Here`s my question:I have a Gembird kb-9140l keyboard with some multimedia keys which are not working on linux. I thought about writing my own driver for it, so as a start, I wrote a small module, which registers an interrupt handler on irq 1 with the IRQF_SHARED flag. In the handler function I put a simple printk with the scancode read from the keyboard. The problem is, that the handler never gets executed. I searched on google, and found that because the native driver doesn`t share its interrupt with another modules, before I call request_irq I have to free the original interrupt handler from the native driver. This would make my computer practically unusable until I reboot, but at least I would see, it works, but it doesn`t. The original driver works fine after I insert my module, and the interrupt handler still doesn`t get called. The weird thing is, when I remove my module, my handler executes ones, and the scancode is 0xFE.
The code is the following:
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <asm/io.h>
MODULE_LICENSE("Dual BSD/GPL");
static int gembirdkb_init(void);
static void gembirdkb_exit(void);
irq_handler_t irq_handler (int irq, void *dev_id, struct pt_regs *regs)
{
static unsigned char scancode;
scancode = inb (0x60);
printk("gembirdkb: irq handled... scancode: %d\n",scancode);
return (irq_handler_t) IRQ_HANDLED;
}
static int gembirdkb_init(void)
{
int ret;
/* free original interrupt handler */
// free_irq(1, NULL);
ret = request_irq (1, (irq_handler_t) irq_handler, IRQF_SHARED, "gembirdkb", (void *)&irq_handler);
printk("gembirdkb: request_irq result: %d\n", ret);
return ret;
}
static void gembirdkb_exit(void)
{
free_irq(1, (void *)&irq_handler);
}
module_init(gembirdkb_init);
module_exit(gembirdkb_exit);
Is there any way I can remove the native driver, or I need to recompile the kernel without it, and insert mine?P.s.: Why every topic on the forum is full with questions about mac, iphone, samsung galaxy etc.?
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Regards,
Peter Teoh
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