+++ /dev/null
-/*
- *
- * 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.
- */
-
-
-/*
- * 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);
-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 )(IRQF_DISABLED|IRQF_SHARED),
- (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 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;
- }
- data_index++;
- }
-}
-
-
-#define NUM_KBD_BYTES 5
-static int handle_data(unsigned char *p_data)
-{
- u_int32_t bit_bucket;
- u_int32_t i, j;
- u_int32_t got_bits, next_byte;
- int down = 0;
-
- /* Reorganize the bit stream */
- for (i=0; i<16; i++)
- p_data[i] = BitReverse(~p_data[i]);
-
- /*
- * We've already previously checked that p_data[0]
- * is equal to leading1 and that (p_data[1] & 0xf)
- * is equal to leading2. These twelve bits are the
- * leader code. We can now throw them away (the 12
- * bits) and continue parsing the stream.
- */
- bit_bucket = p_data[1] << 12;
- got_bits = 4;
- next_byte = 2;
-
- /*
- * Process four bits at a time
- */
- for (i=0; i<NUM_KBD_BYTES; i++) {
-
- kbdbytes[i]=0;
-
- for (j=0; j<8; j++) /* 8 bits per byte */
- {
- if (got_bits < 4) {
- bit_bucket |= (p_data[next_byte++] << (8 - got_bits));
- got_bits += 8;
- }
-
- if ((bit_bucket & 0xF000) == 0x8000) {
- /* Convert 1000b to 1 */
- kbdbytes[i] = 0x80 | (kbdbytes[i] >> 1);
- got_bits -= 4;
- bit_bucket = bit_bucket << 4;
- }
- else if ((bit_bucket & 0xC000) == 0x8000) {
- /* Convert 10b to 0 */
- kbdbytes[i] = kbdbytes[i] >> 1;
- got_bits -= 2;
- bit_bucket = bit_bucket << 2;
- }
- else {
- /* bad serial stream */
- return 1;
- }
-
- if (next_byte > 16) {
- //printk("error: too many bytes\n");
- return 1;
- }
- }
- }
-
-
- if (!CheckSumOk(kbdbytes[0], kbdbytes[1],
- kbdbytes[2], kbdbytes[3], kbdbytes[4])) {
- //printk("checksum failed\n");
- return 1;
- }
-
- if (kbdbytes[1] & 0x08) {
- //printk("m: %x %x %x\n", kbdbytes[1], kbdbytes[2], kbdbytes[3]);
- handle_mouse_event(kbdbytes[1]);
- handle_mouse_event(kbdbytes[2]);
- handle_mouse_event(kbdbytes[3]);
- }
- else {
- if (kbdbytes[2] == 0) down = 1;
-#if 0
- if (down)
- printk("down %d\n", kbdbytes[3]);
- else
- printk("up %d\n", kbdbytes[3]);
-#endif
- handle_keyboard_event(kbdbytes[3], down);
- }
- return 0;
-}
-
-
-DEFINE_SPINLOCK(kbd_controller_lock);
-static unsigned char handle_kbd_event(void);
-
-
-int kbd_setkeycode(unsigned int scancode, unsigned int keycode)
-{
- printk("kbd_setkeycode scancode %x keycode %x\n", scancode, keycode);
- return 0;
-}
-
-int kbd_getkeycode(unsigned int scancode)
-{
- return scancode;
-}
-
-
-int kbd_translate(unsigned char scancode, unsigned char *keycode,
- char raw_mode)
-{
- static int prev_scancode = 0;
-
- if (scancode == 0x00 || scancode == 0xff) {
- prev_scancode = 0;
- return 0;
- }
-
- /* todo */
- if (!prev_scancode && scancode == 160) { /* Fn key down */
- //printk("Fn key down\n");
- prev_scancode = 160;
- return 0;
- }
- else if (prev_scancode && scancode == 160) { /* Fn key up */
- //printk("Fn key up\n");
- prev_scancode = 0;
- return 0;
- }
-
- /* todo */
- if (prev_scancode == 160) {
- if (scancode <= NUM_FN_KEYS) {
- *keycode = fn_keys[scancode];
- //printk("fn keycode %d\n", *keycode);
- }
- else
- return 0;
- }
- else if (scancode <= 127) {
- *keycode = scancode;
- }
- else
- return 0;
-
-
- return 1;
-}
-
-char kbd_unexpected_up(unsigned char keycode)
-{
- //printk("kbd_unexpected_up\n");
- return 0;
-}
-
-static unsigned char kbd_exists = 1;
-
-static inline void handle_keyboard_event(unsigned char scancode, int down)
-{
- kbd_exists = 1;
- handle_scancode(scancode, down);
- tasklet_schedule(&keyboard_tasklet);
-}
-
-
-void kbd_leds(unsigned char leds)
-{
-}
-
-/* dummy */
-void kbd_init_hw(void)
-{
-}
-
-
-
-static inline void handle_mouse_event(unsigned char scancode)
-{
- if(scancode == AUX_RECONNECT){
- queue->head = queue->tail = 0; /* Flush input queue */
- // __aux_write_ack(AUX_ENABLE_DEV); /* ping the mouse :) */
- return;
- }
-
- if (aux_count) {
- int head = queue->head;
-
- queue->buf[head] = scancode;
- head = (head + 1) & (AUX_BUF_SIZE-1);
- if (head != queue->tail) {
- queue->head = head;
- kill_fasync(&queue->fasync, SIGIO, POLL_IN);
- wake_up_interruptible(&queue->proc_list);
- }
- }
-}
-
-static unsigned char get_from_queue(void)
-{
- unsigned char result;
- unsigned long flags;
-
- spin_lock_irqsave(&kbd_controller_lock, flags);
- result = queue->buf[queue->tail];
- queue->tail = (queue->tail + 1) & (AUX_BUF_SIZE-1);
- spin_unlock_irqrestore(&kbd_controller_lock, flags);
- return result;
-}
-
-
-static inline int queue_empty(void)
-{
- return queue->head == queue->tail;
-}
-
-static int fasync_aux(int fd, struct file *filp, int on)
-{
- int retval;
-
- //printk("fasync_aux\n");
- retval = fasync_helper(fd, filp, on, &queue->fasync);
- if (retval < 0)
- return retval;
- return 0;
-}
-
-
-/*
- * Random magic cookie for the aux device
- */
-#define AUX_DEV ((void *)queue)
-
-static int release_aux(struct inode * inode, struct file * file)
-{
- fasync_aux(-1, file, 0);
- aux_count--;
- return 0;
-}
-
-static int open_aux(struct inode * inode, struct file * file)
-{
- if (aux_count++) {
- return 0;
- }
- queue->head = queue->tail = 0; /* Flush input queue */
- return 0;
-}
-
-/*
- * Put bytes from input queue to buffer.
- */
-
-static ssize_t read_aux(struct file * file, char * buffer,
- size_t count, loff_t *ppos)
-{
- DECLARE_WAITQUEUE(wait, current);
- ssize_t i = count;
- unsigned char c;
-
- if (queue_empty()) {
- if (file->f_flags & O_NONBLOCK)
- return -EAGAIN;
- add_wait_queue(&queue->proc_list, &wait);
-repeat:
- set_current_state(TASK_INTERRUPTIBLE);
- if (queue_empty() && !signal_pending(current)) {
- schedule();
- goto repeat;
- }
- current->state = TASK_RUNNING;
- remove_wait_queue(&queue->proc_list, &wait);
- }
- while (i > 0 && !queue_empty()) {
- c = get_from_queue();
- put_user(c, buffer++);
- i--;
- }
- if (count-i) {
- struct inode *inode = file->f_dentry->d_inode;
- inode->i_atime = current_fs_time(inode->i_sb);
- return count-i;
- }
- if (signal_pending(current))
- 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);
- if (!queue) {
- misc_deregister(&psaux_mouse);
- return -ENOMEM;
- }
-
- 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
projects / GitHub / LineageOS / android_kernel_samsung_universal7580.git / commitdiff