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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/char/qtronix.c | |
download | op-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip op-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/char/qtronix.c')
-rw-r--r-- | drivers/char/qtronix.c | 601 |
1 files changed, 601 insertions, 0 deletions
diff --git a/drivers/char/qtronix.c b/drivers/char/qtronix.c new file mode 100644 index 0000000..40a3cf6 --- /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 |