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/*
*
* BRIEF MODULE DESCRIPTION
* Qtronix 990P infrared keyboard driver.
*
*
* Copyright 2001 MontaVista Software Inc.
* Author: MontaVista Software, Inc.
* ppopov@mvista.com or source@mvista.com
*
*
* The bottom portion of this driver was take from
* pc_keyb.c Please see that file for copyrights.
*
* 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* 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.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/config.h>
/*
* NOTE:
*
* This driver has only been tested with the Consumer IR
* port of the ITE 8172 system controller.
*
* You do not need this driver if you are using the ps/2 or
* USB adapter that the keyboard ships with. You only need
* this driver if your board has a IR port and the keyboard
* data is being sent directly to the IR. In that case,
* you also need some low-level IR support. See it8172_cir.c.
*
*/
#ifdef CONFIG_QTRONIX_KEYBOARD
#include <linux/module.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/kernel.h>
#include <asm/it8172/it8172.h>
#include <asm/it8172/it8172_int.h>
#include <asm/it8172/it8172_cir.h>
#include <linux/spinlock.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/tty.h>
#include <linux/mm.h>
#include <linux/signal.h>
#include <linux/init.h>
#include <linux/kbd_ll.h>
#include <linux/delay.h>
#include <linux/poll.h>
#include <linux/miscdevice.h>
#include <linux/slab.h>
#include <linux/kbd_kern.h>
#include <linux/smp_lock.h>
#include <asm/io.h>
#include <linux/pc_keyb.h>
#include <asm/keyboard.h>
#include <linux/bitops.h>
#include <asm/uaccess.h>
#include <asm/irq.h>
#include <asm/system.h>
#define leading1 0
#define leading2 0xF
#define KBD_CIR_PORT 0
#define AUX_RECONNECT 170 /* scancode when ps2 device is plugged (back) in */
static int data_index;
struct cir_port *cir;
static unsigned char kbdbytes[5];
static unsigned char cir_data[32]; /* we only need 16 chars */
static void kbd_int_handler(int irq, void *dev_id, struct pt_regs *regs);
static int handle_data(unsigned char *p_data);
static inline void handle_mouse_event(unsigned char scancode);
static inline void handle_keyboard_event(unsigned char scancode, int down);
static int __init psaux_init(void);
static struct aux_queue *queue; /* Mouse data buffer. */
static int aux_count = 0;
/*
* Keys accessed through the 'Fn' key
* The Fn key does not produce a key-up sequence. So, the first
* time the user presses it, it will be key-down event. The key
* stays down until the user presses it again.
*/
#define NUM_FN_KEYS 56
static unsigned char fn_keys[NUM_FN_KEYS] = {
0,0,0,0,0,0,0,0, /* 0 7 */
8,9,10,93,0,0,0,0, /* 8 15 */
0,0,0,0,0,0,0,5, /* 16 23 */
6,7,91,0,0,0,0,0, /* 24 31 */
0,0,0,0,0,2,3,4, /* 32 39 */
92,0,0,0,0,0,0,0, /* 40 47 */
0,0,0,0,11,0,94,95 /* 48 55 */
};
void __init init_qtronix_990P_kbd(void)
{
int retval;
cir = (struct cir_port *)kmalloc(sizeof(struct cir_port), GFP_KERNEL);
if (!cir) {
printk("Unable to initialize Qtronix keyboard\n");
return;
}
/*
* revisit
* this should be programmable, somehow by the, by the user.
*/
cir->port = KBD_CIR_PORT;
cir->baud_rate = 0x1d;
cir->rdwos = 0;
cir->rxdcr = 0x3;
cir->hcfs = 0;
cir->fifo_tl = 0;
cir->cfq = 0x1d;
cir_port_init(cir);
retval = request_irq(IT8172_CIR0_IRQ, kbd_int_handler,
(unsigned long )(SA_INTERRUPT|SA_SHIRQ),
(const char *)"Qtronix IR Keyboard", (void *)cir);
if (retval) {
printk("unable to allocate cir %d irq %d\n",
cir->port, IT8172_CIR0_IRQ);
}
#ifdef CONFIG_PSMOUSE
psaux_init();
#endif
}
static inline unsigned char BitReverse(unsigned short key)
{
unsigned char rkey = 0;
rkey |= (key & 0x1) << 7;
rkey |= (key & 0x2) << 5;
rkey |= (key & 0x4) << 3;
rkey |= (key & 0x8) << 1;
rkey |= (key & 0x10) >> 1;
rkey |= (key & 0x20) >> 3;
rkey |= (key & 0x40) >> 5;
rkey |= (key & 0x80) >> 7;
return rkey;
}
static inline u_int8_t UpperByte(u_int8_t data)
{
return (data >> 4);
}
static inline u_int8_t LowerByte(u_int8_t data)
{
return (data & 0xF);
}
int CheckSumOk(u_int8_t byte1, u_int8_t byte2,
u_int8_t byte3, u_int8_t byte4, u_int8_t byte5)
{
u_int8_t CheckSum;
CheckSum = (byte1 & 0x0F) + byte2 + byte3 + byte4 + byte5;
if ( LowerByte(UpperByte(CheckSum) + LowerByte(CheckSum)) != UpperByte(byte1) )
return 0;
else
return 1;
}
static void kbd_int_handler(int irq, void *dev_id, struct pt_regs *regs)
{
struct cir_port *cir;
int j;
unsigned char int_status;
cir = (struct cir_port *)dev_id;
int_status = get_int_status(cir);
if (int_status & 0x4) {
clear_fifo(cir);
return;
}
while (cir_get_rx_count(cir)) {
cir_data[data_index] = cir_read_data(cir);
if (data_index == 0) {/* expecting first byte */
if (cir_data[data_index] != leading1) {
//printk("!leading byte %x\n", cir_data[data_index]);
set_rx_active(cir);
clear_fifo(cir);
continue;
}
}
if (data_index == 1) {
if ((cir_data[data_index] & 0xf) != leading2) {
set_rx_active(cir);
data_index = 0; /* start over */
clear_fifo(cir);
continue;
}
}
if ( (cir_data[data_index] == 0xff)) { /* last byte */
//printk("data_index %d\n", data_index);
set_rx_active(cir);
#if 0
for (j=0; j<=data_index; j++) {
printk("rx_data %d: %x\n", j, cir_data[j]);
}
#endif
data_index = 0;
handle_data(cir_data);
return;
}
else if (data_index>16) {
set_rx_active(cir);
#if 0
printk("warning: data_index %d\n", data_index);
for (j=0; j<=data_index; j++) {
printk("rx_data %d: %x\n", j, cir_data[j]);
}
#endif
data_index = 0;
clear_fifo(cir);
return;
}
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