aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/char/qtronix.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/char/qtronix.c')
-rw-r--r--drivers/char/qtronix.c601
1 files changed, 601 insertions, 0 deletions
diff --git a/drivers/char/qtronix.c b/drivers/char/qtronix.c
new file mode 100644
index 000000000000..40a3cf62e1a8
--- /dev/null
+++ b/drivers/char/qtronix.c
@@ -0,0 +1,601 @@
+/*
+ *
+ * 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;
+ }
+ 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);
+ 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
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.