602 lines
13 KiB
C
602 lines
13 KiB
C
/*
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*
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* BRIEF MODULE DESCRIPTION
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* Qtronix 990P infrared keyboard driver.
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*
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*
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* Copyright 2001 MontaVista Software Inc.
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* Author: MontaVista Software, Inc.
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* ppopov@mvista.com or source@mvista.com
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*
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*
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* The bottom portion of this driver was take from
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* pc_keyb.c Please see that file for copyrights.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/config.h>
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/*
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* NOTE:
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*
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* This driver has only been tested with the Consumer IR
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* port of the ITE 8172 system controller.
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*
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* You do not need this driver if you are using the ps/2 or
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* USB adapter that the keyboard ships with. You only need
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* this driver if your board has a IR port and the keyboard
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* data is being sent directly to the IR. In that case,
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* you also need some low-level IR support. See it8172_cir.c.
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*
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*/
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#ifdef CONFIG_QTRONIX_KEYBOARD
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/kernel.h>
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#include <asm/it8172/it8172.h>
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#include <asm/it8172/it8172_int.h>
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#include <asm/it8172/it8172_cir.h>
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#include <linux/spinlock.h>
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#include <linux/sched.h>
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#include <linux/interrupt.h>
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#include <linux/tty.h>
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#include <linux/mm.h>
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#include <linux/signal.h>
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#include <linux/init.h>
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#include <linux/kbd_ll.h>
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#include <linux/delay.h>
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#include <linux/poll.h>
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#include <linux/miscdevice.h>
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#include <linux/slab.h>
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#include <linux/kbd_kern.h>
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#include <linux/smp_lock.h>
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#include <asm/io.h>
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#include <linux/pc_keyb.h>
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#include <asm/keyboard.h>
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#include <linux/bitops.h>
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#include <asm/uaccess.h>
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#include <asm/irq.h>
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#include <asm/system.h>
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#define leading1 0
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#define leading2 0xF
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#define KBD_CIR_PORT 0
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#define AUX_RECONNECT 170 /* scancode when ps2 device is plugged (back) in */
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static int data_index;
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struct cir_port *cir;
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static unsigned char kbdbytes[5];
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static unsigned char cir_data[32]; /* we only need 16 chars */
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static void kbd_int_handler(int irq, void *dev_id, struct pt_regs *regs);
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static int handle_data(unsigned char *p_data);
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static inline void handle_mouse_event(unsigned char scancode);
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static inline void handle_keyboard_event(unsigned char scancode, int down);
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static int __init psaux_init(void);
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static struct aux_queue *queue; /* Mouse data buffer. */
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static int aux_count = 0;
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/*
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* Keys accessed through the 'Fn' key
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* The Fn key does not produce a key-up sequence. So, the first
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* time the user presses it, it will be key-down event. The key
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* stays down until the user presses it again.
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*/
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#define NUM_FN_KEYS 56
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static unsigned char fn_keys[NUM_FN_KEYS] = {
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0,0,0,0,0,0,0,0, /* 0 7 */
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8,9,10,93,0,0,0,0, /* 8 15 */
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0,0,0,0,0,0,0,5, /* 16 23 */
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6,7,91,0,0,0,0,0, /* 24 31 */
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0,0,0,0,0,2,3,4, /* 32 39 */
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92,0,0,0,0,0,0,0, /* 40 47 */
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0,0,0,0,11,0,94,95 /* 48 55 */
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};
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void __init init_qtronix_990P_kbd(void)
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{
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int retval;
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cir = (struct cir_port *)kmalloc(sizeof(struct cir_port), GFP_KERNEL);
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if (!cir) {
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printk("Unable to initialize Qtronix keyboard\n");
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return;
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}
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/*
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* revisit
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* this should be programmable, somehow by the, by the user.
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*/
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cir->port = KBD_CIR_PORT;
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cir->baud_rate = 0x1d;
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cir->rdwos = 0;
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cir->rxdcr = 0x3;
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cir->hcfs = 0;
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cir->fifo_tl = 0;
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cir->cfq = 0x1d;
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cir_port_init(cir);
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retval = request_irq(IT8172_CIR0_IRQ, kbd_int_handler,
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(unsigned long )(SA_INTERRUPT|SA_SHIRQ),
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(const char *)"Qtronix IR Keyboard", (void *)cir);
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if (retval) {
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printk("unable to allocate cir %d irq %d\n",
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cir->port, IT8172_CIR0_IRQ);
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}
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#ifdef CONFIG_PSMOUSE
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psaux_init();
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#endif
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}
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static inline unsigned char BitReverse(unsigned short key)
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{
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unsigned char rkey = 0;
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rkey |= (key & 0x1) << 7;
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rkey |= (key & 0x2) << 5;
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rkey |= (key & 0x4) << 3;
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rkey |= (key & 0x8) << 1;
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rkey |= (key & 0x10) >> 1;
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rkey |= (key & 0x20) >> 3;
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rkey |= (key & 0x40) >> 5;
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rkey |= (key & 0x80) >> 7;
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return rkey;
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}
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static inline u_int8_t UpperByte(u_int8_t data)
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{
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return (data >> 4);
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}
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static inline u_int8_t LowerByte(u_int8_t data)
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{
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return (data & 0xF);
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}
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int CheckSumOk(u_int8_t byte1, u_int8_t byte2,
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u_int8_t byte3, u_int8_t byte4, u_int8_t byte5)
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{
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u_int8_t CheckSum;
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CheckSum = (byte1 & 0x0F) + byte2 + byte3 + byte4 + byte5;
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if ( LowerByte(UpperByte(CheckSum) + LowerByte(CheckSum)) != UpperByte(byte1) )
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return 0;
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else
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return 1;
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}
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static void kbd_int_handler(int irq, void *dev_id, struct pt_regs *regs)
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{
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struct cir_port *cir;
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int j;
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unsigned char int_status;
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cir = (struct cir_port *)dev_id;
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int_status = get_int_status(cir);
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if (int_status & 0x4) {
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clear_fifo(cir);
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return;
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}
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while (cir_get_rx_count(cir)) {
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cir_data[data_index] = cir_read_data(cir);
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if (data_index == 0) {/* expecting first byte */
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if (cir_data[data_index] != leading1) {
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//printk("!leading byte %x\n", cir_data[data_index]);
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set_rx_active(cir);
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clear_fifo(cir);
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continue;
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}
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}
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if (data_index == 1) {
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if ((cir_data[data_index] & 0xf) != leading2) {
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set_rx_active(cir);
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data_index = 0; /* start over */
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clear_fifo(cir);
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continue;
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}
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}
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if ( (cir_data[data_index] == 0xff)) { /* last byte */
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//printk("data_index %d\n", data_index);
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set_rx_active(cir);
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#if 0
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for (j=0; j<=data_index; j++) {
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printk("rx_data %d: %x\n", j, cir_data[j]);
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}
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#endif
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data_index = 0;
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handle_data(cir_data);
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return;
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}
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else if (data_index>16) {
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set_rx_active(cir);
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#if 0
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printk("warning: data_index %d\n", data_index);
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for (j=0; j<=data_index; j++) {
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printk("rx_data %d: %x\n", j, cir_data[j]);
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}
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#endif
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data_index = 0;
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clear_fifo(cir);
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return;
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}
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data_index++;
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}
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}
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#define NUM_KBD_BYTES 5
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static int handle_data(unsigned char *p_data)
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{
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u_int32_t bit_bucket;
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u_int32_t i, j;
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u_int32_t got_bits, next_byte;
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int down = 0;
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/* Reorganize the bit stream */
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for (i=0; i<16; i++)
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p_data[i] = BitReverse(~p_data[i]);
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/*
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* We've already previously checked that p_data[0]
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* is equal to leading1 and that (p_data[1] & 0xf)
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* is equal to leading2. These twelve bits are the
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* leader code. We can now throw them away (the 12
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* bits) and continue parsing the stream.
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*/
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bit_bucket = p_data[1] << 12;
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got_bits = 4;
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next_byte = 2;
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/*
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* Process four bits at a time
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*/
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for (i=0; i<NUM_KBD_BYTES; i++) {
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kbdbytes[i]=0;
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for (j=0; j<8; j++) /* 8 bits per byte */
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{
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if (got_bits < 4) {
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bit_bucket |= (p_data[next_byte++] << (8 - got_bits));
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got_bits += 8;
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}
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if ((bit_bucket & 0xF000) == 0x8000) {
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/* Convert 1000b to 1 */
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kbdbytes[i] = 0x80 | (kbdbytes[i] >> 1);
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got_bits -= 4;
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bit_bucket = bit_bucket << 4;
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}
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else if ((bit_bucket & 0xC000) == 0x8000) {
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/* Convert 10b to 0 */
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kbdbytes[i] = kbdbytes[i] >> 1;
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got_bits -= 2;
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bit_bucket = bit_bucket << 2;
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}
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else {
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/* bad serial stream */
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return 1;
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}
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if (next_byte > 16) {
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//printk("error: too many bytes\n");
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return 1;
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}
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}
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}
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if (!CheckSumOk(kbdbytes[0], kbdbytes[1],
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kbdbytes[2], kbdbytes[3], kbdbytes[4])) {
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//printk("checksum failed\n");
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return 1;
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}
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if (kbdbytes[1] & 0x08) {
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//printk("m: %x %x %x\n", kbdbytes[1], kbdbytes[2], kbdbytes[3]);
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handle_mouse_event(kbdbytes[1]);
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handle_mouse_event(kbdbytes[2]);
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handle_mouse_event(kbdbytes[3]);
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}
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else {
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if (kbdbytes[2] == 0) down = 1;
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#if 0
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if (down)
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printk("down %d\n", kbdbytes[3]);
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else
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printk("up %d\n", kbdbytes[3]);
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#endif
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handle_keyboard_event(kbdbytes[3], down);
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}
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return 0;
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}
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DEFINE_SPINLOCK(kbd_controller_lock);
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static unsigned char handle_kbd_event(void);
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int kbd_setkeycode(unsigned int scancode, unsigned int keycode)
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{
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printk("kbd_setkeycode scancode %x keycode %x\n", scancode, keycode);
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return 0;
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}
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int kbd_getkeycode(unsigned int scancode)
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{
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return scancode;
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}
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int kbd_translate(unsigned char scancode, unsigned char *keycode,
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char raw_mode)
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{
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static int prev_scancode = 0;
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if (scancode == 0x00 || scancode == 0xff) {
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prev_scancode = 0;
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return 0;
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}
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/* todo */
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if (!prev_scancode && scancode == 160) { /* Fn key down */
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//printk("Fn key down\n");
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prev_scancode = 160;
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return 0;
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}
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else if (prev_scancode && scancode == 160) { /* Fn key up */
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//printk("Fn key up\n");
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prev_scancode = 0;
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return 0;
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}
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/* todo */
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if (prev_scancode == 160) {
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if (scancode <= NUM_FN_KEYS) {
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*keycode = fn_keys[scancode];
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//printk("fn keycode %d\n", *keycode);
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}
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else
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return 0;
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}
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else if (scancode <= 127) {
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*keycode = scancode;
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}
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else
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return 0;
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return 1;
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}
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char kbd_unexpected_up(unsigned char keycode)
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{
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//printk("kbd_unexpected_up\n");
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return 0;
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}
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static unsigned char kbd_exists = 1;
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static inline void handle_keyboard_event(unsigned char scancode, int down)
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{
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kbd_exists = 1;
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handle_scancode(scancode, down);
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tasklet_schedule(&keyboard_tasklet);
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}
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void kbd_leds(unsigned char leds)
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{
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}
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/* dummy */
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void kbd_init_hw(void)
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{
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}
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static inline void handle_mouse_event(unsigned char scancode)
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{
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if(scancode == AUX_RECONNECT){
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queue->head = queue->tail = 0; /* Flush input queue */
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// __aux_write_ack(AUX_ENABLE_DEV); /* ping the mouse :) */
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return;
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}
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if (aux_count) {
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int head = queue->head;
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queue->buf[head] = scancode;
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head = (head + 1) & (AUX_BUF_SIZE-1);
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if (head != queue->tail) {
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queue->head = head;
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kill_fasync(&queue->fasync, SIGIO, POLL_IN);
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wake_up_interruptible(&queue->proc_list);
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}
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}
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}
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static unsigned char get_from_queue(void)
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{
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unsigned char result;
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unsigned long flags;
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spin_lock_irqsave(&kbd_controller_lock, flags);
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result = queue->buf[queue->tail];
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queue->tail = (queue->tail + 1) & (AUX_BUF_SIZE-1);
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spin_unlock_irqrestore(&kbd_controller_lock, flags);
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return result;
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}
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static inline int queue_empty(void)
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{
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return queue->head == queue->tail;
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}
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static int fasync_aux(int fd, struct file *filp, int on)
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{
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int retval;
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//printk("fasync_aux\n");
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retval = fasync_helper(fd, filp, on, &queue->fasync);
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if (retval < 0)
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return retval;
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return 0;
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}
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/*
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* Random magic cookie for the aux device
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*/
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#define AUX_DEV ((void *)queue)
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static int release_aux(struct inode * inode, struct file * file)
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{
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fasync_aux(-1, file, 0);
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aux_count--;
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return 0;
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}
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static int open_aux(struct inode * inode, struct file * file)
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{
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if (aux_count++) {
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return 0;
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}
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queue->head = queue->tail = 0; /* Flush input queue */
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return 0;
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}
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/*
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* Put bytes from input queue to buffer.
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*/
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static ssize_t read_aux(struct file * file, char * buffer,
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size_t count, loff_t *ppos)
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{
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DECLARE_WAITQUEUE(wait, current);
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ssize_t i = count;
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unsigned char c;
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if (queue_empty()) {
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if (file->f_flags & O_NONBLOCK)
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return -EAGAIN;
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add_wait_queue(&queue->proc_list, &wait);
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repeat:
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set_current_state(TASK_INTERRUPTIBLE);
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if (queue_empty() && !signal_pending(current)) {
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schedule();
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goto repeat;
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}
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current->state = TASK_RUNNING;
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remove_wait_queue(&queue->proc_list, &wait);
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}
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while (i > 0 && !queue_empty()) {
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c = get_from_queue();
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put_user(c, buffer++);
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i--;
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}
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if (count-i) {
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struct inode *inode = file->f_dentry->d_inode;
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inode->i_atime = current_fs_time(inode->i_sb);
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return count-i;
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}
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if (signal_pending(current))
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return -ERESTARTSYS;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Write to the aux device.
|
|
*/
|
|
|
|
static ssize_t write_aux(struct file * file, const char * buffer,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
/*
|
|
* The ITE boards this was tested on did not have the
|
|
* transmit wires connected.
|
|
*/
|
|
return count;
|
|
}
|
|
|
|
static unsigned int aux_poll(struct file *file, poll_table * wait)
|
|
{
|
|
poll_wait(file, &queue->proc_list, wait);
|
|
if (!queue_empty())
|
|
return POLLIN | POLLRDNORM;
|
|
return 0;
|
|
}
|
|
|
|
struct file_operations psaux_fops = {
|
|
.read = read_aux,
|
|
.write = write_aux,
|
|
.poll = aux_poll,
|
|
.open = open_aux,
|
|
.release = release_aux,
|
|
.fasync = fasync_aux,
|
|
};
|
|
|
|
/*
|
|
* Initialize driver.
|
|
*/
|
|
static struct miscdevice psaux_mouse = {
|
|
PSMOUSE_MINOR, "psaux", &psaux_fops
|
|
};
|
|
|
|
static int __init psaux_init(void)
|
|
{
|
|
int retval;
|
|
|
|
retval = misc_register(&psaux_mouse);
|
|
if(retval < 0)
|
|
return retval;
|
|
|
|
queue = (struct aux_queue *) kmalloc(sizeof(*queue), GFP_KERNEL);
|
|
memset(queue, 0, sizeof(*queue));
|
|
queue->head = queue->tail = 0;
|
|
init_waitqueue_head(&queue->proc_list);
|
|
|
|
return 0;
|
|
}
|
|
module_init(init_qtronix_990P_kbd);
|
|
#endif
|