Release 4.11 drivers/input/serio/sa1111ps2.c
/*
* linux/drivers/input/serio/sa1111ps2.c
*
* Copyright (C) 2002 Russell King
*
* 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.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/serio.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <asm/io.h>
#include <asm/hardware/sa1111.h>
#define PS2CR 0x0000
#define PS2STAT 0x0004
#define PS2DATA 0x0008
#define PS2CLKDIV 0x000c
#define PS2PRECNT 0x0010
#define PS2CR_ENA 0x08
#define PS2CR_FKD 0x02
#define PS2CR_FKC 0x01
#define PS2STAT_STP 0x0100
#define PS2STAT_TXE 0x0080
#define PS2STAT_TXB 0x0040
#define PS2STAT_RXF 0x0020
#define PS2STAT_RXB 0x0010
#define PS2STAT_ENA 0x0008
#define PS2STAT_RXP 0x0004
#define PS2STAT_KBD 0x0002
#define PS2STAT_KBC 0x0001
struct ps2if {
struct serio *io;
struct sa1111_dev *dev;
void __iomem *base;
unsigned int open;
spinlock_t lock;
unsigned int head;
unsigned int tail;
unsigned char buf[4];
};
/*
* Read all bytes waiting in the PS2 port. There should be
* at the most one, but we loop for safety. If there was a
* framing error, we have to manually clear the status.
*/
static irqreturn_t ps2_rxint(int irq, void *dev_id)
{
struct ps2if *ps2if = dev_id;
unsigned int scancode, flag, status;
status = sa1111_readl(ps2if->base + PS2STAT);
while (status & PS2STAT_RXF) {
if (status & PS2STAT_STP)
sa1111_writel(PS2STAT_STP, ps2if->base + PS2STAT);
flag = (status & PS2STAT_STP ? SERIO_FRAME : 0) |
(status & PS2STAT_RXP ? 0 : SERIO_PARITY);
scancode = sa1111_readl(ps2if->base + PS2DATA) & 0xff;
if (hweight8(scancode) & 1)
flag ^= SERIO_PARITY;
serio_interrupt(ps2if->io, scancode, flag);
status = sa1111_readl(ps2if->base + PS2STAT);
}
return IRQ_HANDLED;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Vojtech Pavlik | 115 | 83.94% | 1 | 20.00% |
Russell King | 22 | 16.06% | 4 | 80.00% |
Total | 137 | 100.00% | 5 | 100.00% |
/*
* Completion of ps2 write
*/
static irqreturn_t ps2_txint(int irq, void *dev_id)
{
struct ps2if *ps2if = dev_id;
unsigned int status;
spin_lock(&ps2if->lock);
status = sa1111_readl(ps2if->base + PS2STAT);
if (ps2if->head == ps2if->tail) {
disable_irq_nosync(irq);
/* done */
} else if (status & PS2STAT_TXE) {
sa1111_writel(ps2if->buf[ps2if->tail], ps2if->base + PS2DATA);
ps2if->tail = (ps2if->tail + 1) & (sizeof(ps2if->buf) - 1);
}
spin_unlock(&ps2if->lock);
return IRQ_HANDLED;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Russell King | 114 | 93.44% | 3 | 60.00% |
Vojtech Pavlik | 7 | 5.74% | 1 | 20.00% |
Ben Nizette | 1 | 0.82% | 1 | 20.00% |
Total | 122 | 100.00% | 5 | 100.00% |
/*
* Write a byte to the PS2 port. We have to wait for the
* port to indicate that the transmitter is empty.
*/
static int ps2_write(struct serio *io, unsigned char val)
{
struct ps2if *ps2if = io->port_data;
unsigned long flags;
unsigned int head;
spin_lock_irqsave(&ps2if->lock, flags);
/*
* If the TX register is empty, we can go straight out.
*/
if (sa1111_readl(ps2if->base + PS2STAT) & PS2STAT_TXE) {
sa1111_writel(val, ps2if->base + PS2DATA);
} else {
if (ps2if->head == ps2if->tail)
enable_irq(ps2if->dev->irq[1]);
head = (ps2if->head + 1) & (sizeof(ps2if->buf) - 1);
if (head != ps2if->tail) {
ps2if->buf[ps2if->head] = val;
ps2if->head = head;
}
}
spin_unlock_irqrestore(&ps2if->lock, flags);
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Russell King | 105 | 67.74% | 2 | 50.00% |
Vojtech Pavlik | 49 | 31.61% | 1 | 25.00% |
Dmitry Torokhov | 1 | 0.65% | 1 | 25.00% |
Total | 155 | 100.00% | 4 | 100.00% |
static int ps2_open(struct serio *io)
{
struct ps2if *ps2if = io->port_data;
int ret;
ret = sa1111_enable_device(ps2if->dev);
if (ret)
return ret;
ret = request_irq(ps2if->dev->irq[0], ps2_rxint, 0,
SA1111_DRIVER_NAME(ps2if->dev), ps2if);
if (ret) {
printk(KERN_ERR "sa1111ps2: could not allocate IRQ%d: %d\n",
ps2if->dev->irq[0], ret);
sa1111_disable_device(ps2if->dev);
return ret;
}
ret = request_irq(ps2if->dev->irq[1], ps2_txint, 0,
SA1111_DRIVER_NAME(ps2if->dev), ps2if);
if (ret) {
printk(KERN_ERR "sa1111ps2: could not allocate IRQ%d: %d\n",
ps2if->dev->irq[1], ret);
free_irq(ps2if->dev->irq[0], ps2if);
sa1111_disable_device(ps2if->dev);
return ret;
}
ps2if->open = 1;
enable_irq_wake(ps2if->dev->irq[0]);
sa1111_writel(PS2CR_ENA, ps2if->base + PS2CR);
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Russell King | 138 | 67.32% | 4 | 66.67% |
Vojtech Pavlik | 66 | 32.20% | 1 | 16.67% |
Dmitry Torokhov | 1 | 0.49% | 1 | 16.67% |
Total | 205 | 100.00% | 6 | 100.00% |
static void ps2_close(struct serio *io)
{
struct ps2if *ps2if = io->port_data;
sa1111_writel(0, ps2if->base + PS2CR);
disable_irq_wake(ps2if->dev->irq[0]);
ps2if->open = 0;
free_irq(ps2if->dev->irq[1], ps2if);
free_irq(ps2if->dev->irq[0], ps2if);
sa1111_disable_device(ps2if->dev);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Russell King | 44 | 52.38% | 3 | 60.00% |
Vojtech Pavlik | 39 | 46.43% | 1 | 20.00% |
Dmitry Torokhov | 1 | 1.19% | 1 | 20.00% |
Total | 84 | 100.00% | 5 | 100.00% |
/*
* Clear the input buffer.
*/
static void ps2_clear_input(struct ps2if *ps2if)
{
int maxread = 100;
while (maxread--) {
if ((sa1111_readl(ps2if->base + PS2DATA) & 0xff) == 0xff)
break;
}
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Vojtech Pavlik | 38 | 92.68% | 1 | 33.33% |
Russell King | 3 | 7.32% | 2 | 66.67% |
Total | 41 | 100.00% | 3 | 100.00% |
static unsigned int ps2_test_one(struct ps2if *ps2if,
unsigned int mask)
{
unsigned int val;
sa1111_writel(PS2CR_ENA | mask, ps2if->base + PS2CR);
udelay(2);
val = sa1111_readl(ps2if->base + PS2STAT);
return val & (PS2STAT_KBC | PS2STAT_KBD);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Vojtech Pavlik | 53 | 91.38% | 1 | 33.33% |
Russell King | 5 | 8.62% | 2 | 66.67% |
Total | 58 | 100.00% | 3 | 100.00% |
/*
* Test the keyboard interface. We basically check to make sure that
* we can drive each line to the keyboard independently of each other.
*/
static int ps2_test(struct ps2if *ps2if)
{
unsigned int stat;
int ret = 0;
stat = ps2_test_one(ps2if, PS2CR_FKC);
if (stat != PS2STAT_KBD) {
printk("PS/2 interface test failed[1]: %02x\n", stat);
ret = -ENODEV;
}
stat = ps2_test_one(ps2if, 0);
if (stat != (PS2STAT_KBC | PS2STAT_KBD)) {
printk("PS/2 interface test failed[2]: %02x\n", stat);
ret = -ENODEV;
}
stat = ps2_test_one(ps2if, PS2CR_FKD);
if (stat != PS2STAT_KBC) {
printk("PS/2 interface test failed[3]: %02x\n", stat);
ret = -ENODEV;
}
sa1111_writel(0, ps2if->base + PS2CR);
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Vojtech Pavlik | 116 | 92.80% | 1 | 33.33% |
Russell King | 9 | 7.20% | 2 | 66.67% |
Total | 125 | 100.00% | 3 | 100.00% |
/*
* Add one device to this driver.
*/
static int ps2_probe(struct sa1111_dev *dev)
{
struct ps2if *ps2if;
struct serio *serio;
int ret;
ps2if = kzalloc(sizeof(struct ps2if), GFP_KERNEL);
serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
if (!ps2if || !serio) {
ret = -ENOMEM;
goto free;
}
serio->id.type = SERIO_8042;
serio->write = ps2_write;
serio->open = ps2_open;
serio->close = ps2_close;
strlcpy(serio->name, dev_name(&dev->dev), sizeof(serio->name));
strlcpy(serio->phys, dev_name(&dev->dev), sizeof(serio->phys));
serio->port_data = ps2if;
serio->dev.parent = &dev->dev;
ps2if->io = serio;
ps2if->dev = dev;
sa1111_set_drvdata(dev, ps2if);
spin_lock_init(&ps2if->lock);
/*
* Request the physical region for this PS2 port.
*/
if (!request_mem_region(dev->res.start,
dev->res.end - dev->res.start + 1,
SA1111_DRIVER_NAME(dev))) {
ret = -EBUSY;
goto free;
}
/*
* Our parent device has already mapped the region.
*/
ps2if->base = dev->mapbase;
sa1111_enable_device(ps2if->dev);
/* Incoming clock is 8MHz */
sa1111_writel(0, ps2if->base + PS2CLKDIV);
sa1111_writel(127, ps2if->base + PS2PRECNT);
/*
* Flush any pending input.
*/
ps2_clear_input(ps2if);
/*
* Test the keyboard interface.
*/
ret = ps2_test(ps2if);
if (ret)
goto out;
/*
* Flush any pending input.
*/
ps2_clear_input(ps2if);
sa1111_disable_device(ps2if->dev);
serio_register_port(ps2if->io);
return 0;
out:
sa1111_disable_device(ps2if->dev);
release_mem_region(dev->res.start, resource_size(&dev->res));
free:
sa1111_set_drvdata(dev, NULL);
kfree(ps2if);
kfree(serio);
return ret;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Russell King | 155 | 43.66% | 3 | 27.27% |
Vojtech Pavlik | 106 | 29.86% | 1 | 9.09% |
Dmitry Torokhov | 80 | 22.54% | 4 | 36.36% |
Kay Sievers | 8 | 2.25% | 1 | 9.09% |
Joe Perches | 4 | 1.13% | 1 | 9.09% |
Yoann Padioleau | 2 | 0.56% | 1 | 9.09% |
Total | 355 | 100.00% | 11 | 100.00% |
/*
* Remove one device from this driver.
*/
static int ps2_remove(struct sa1111_dev *dev)
{
struct ps2if *ps2if = sa1111_get_drvdata(dev);
serio_unregister_port(ps2if->io);
release_mem_region(dev->res.start, resource_size(&dev->res));
sa1111_set_drvdata(dev, NULL);
kfree(ps2if);
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Russell King | 39 | 65.00% | 2 | 50.00% |
Vojtech Pavlik | 17 | 28.33% | 1 | 25.00% |
Joe Perches | 4 | 6.67% | 1 | 25.00% |
Total | 60 | 100.00% | 4 | 100.00% |
/*
* Our device driver structure
*/
static struct sa1111_driver ps2_driver = {
.drv = {
.name = "sa1111-ps2",
.owner = THIS_MODULE,
},
.devid = SA1111_DEVID_PS2,
.probe = ps2_probe,
.remove = ps2_remove,
};
static int __init ps2_init(void)
{
return sa1111_driver_register(&ps2_driver);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Vojtech Pavlik | 13 | 81.25% | 1 | 33.33% |
Russell King | 3 | 18.75% | 2 | 66.67% |
Total | 16 | 100.00% | 3 | 100.00% |
static void __exit ps2_exit(void)
{
sa1111_driver_unregister(&ps2_driver);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Vojtech Pavlik | 13 | 86.67% | 1 | 33.33% |
Russell King | 2 | 13.33% | 2 | 66.67% |
Total | 15 | 100.00% | 3 | 100.00% |
module_init(ps2_init);
module_exit(ps2_exit);
MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
MODULE_DESCRIPTION("SA1111 PS2 controller driver");
MODULE_LICENSE("GPL");
Overall Contributors
Person | Tokens | Prop | Commits | CommitProp |
Russell King | 767 | 48.15% | 11 | 55.00% |
Vojtech Pavlik | 723 | 45.39% | 1 | 5.00% |
Dmitry Torokhov | 84 | 5.27% | 4 | 20.00% |
Kay Sievers | 8 | 0.50% | 1 | 5.00% |
Joe Perches | 8 | 0.50% | 1 | 5.00% |
Yoann Padioleau | 2 | 0.13% | 1 | 5.00% |
Ben Nizette | 1 | 0.06% | 1 | 5.00% |
Total | 1593 | 100.00% | 20 | 100.00% |
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.