399 lines
8.7 KiB
C
399 lines
8.7 KiB
C
/*
|
|
* linux/drivers/hil/hilkbd.c
|
|
*
|
|
* Copyright (C) 1998 Philip Blundell <philb@gnu.org>
|
|
* Copyright (C) 1999 Matthew Wilcox <willy@bofh.ai>
|
|
* Copyright (C) 1999-2007 Helge Deller <deller@gmx.de>
|
|
*
|
|
* Very basic HP Human Interface Loop (HIL) driver.
|
|
* This driver handles the keyboard on HP300 (m68k) and on some
|
|
* HP700 (parisc) series machines.
|
|
*
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License version 2. See the file COPYING in the main directory of this
|
|
* archive for more details.
|
|
*/
|
|
|
|
#include <linux/pci_ids.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/module.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/input.h>
|
|
#include <linux/init.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/hil.h>
|
|
#include <linux/io.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/spinlock.h>
|
|
#include <asm/irq.h>
|
|
#ifdef CONFIG_HP300
|
|
#include <asm/hwtest.h>
|
|
#endif
|
|
|
|
|
|
MODULE_AUTHOR("Philip Blundell, Matthew Wilcox, Helge Deller");
|
|
MODULE_DESCRIPTION("HIL keyboard driver (basic functionality)");
|
|
MODULE_LICENSE("GPL v2");
|
|
|
|
|
|
#if defined(CONFIG_PARISC)
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/hardware.h>
|
|
#include <asm/parisc-device.h>
|
|
static unsigned long hil_base; /* HPA for the HIL device */
|
|
static unsigned int hil_irq;
|
|
#define HILBASE hil_base /* HPPA (parisc) port address */
|
|
#define HIL_DATA 0x800
|
|
#define HIL_CMD 0x801
|
|
#define HIL_IRQ hil_irq
|
|
#define hil_readb(p) gsc_readb(p)
|
|
#define hil_writeb(v,p) gsc_writeb((v),(p))
|
|
|
|
#elif defined(CONFIG_HP300)
|
|
|
|
#define HILBASE 0xf0428000UL /* HP300 (m68k) port address */
|
|
#define HIL_DATA 0x1
|
|
#define HIL_CMD 0x3
|
|
#define HIL_IRQ 2
|
|
#define hil_readb(p) readb((const volatile void __iomem *)(p))
|
|
#define hil_writeb(v, p) writeb((v), (volatile void __iomem *)(p))
|
|
|
|
#else
|
|
#error "HIL is not supported on this platform"
|
|
#endif
|
|
|
|
|
|
|
|
/* HIL helper functions */
|
|
|
|
#define hil_busy() (hil_readb(HILBASE + HIL_CMD) & HIL_BUSY)
|
|
#define hil_data_available() (hil_readb(HILBASE + HIL_CMD) & HIL_DATA_RDY)
|
|
#define hil_status() (hil_readb(HILBASE + HIL_CMD))
|
|
#define hil_command(x) do { hil_writeb((x), HILBASE + HIL_CMD); } while (0)
|
|
#define hil_read_data() (hil_readb(HILBASE + HIL_DATA))
|
|
#define hil_write_data(x) do { hil_writeb((x), HILBASE + HIL_DATA); } while (0)
|
|
|
|
/* HIL constants */
|
|
|
|
#define HIL_BUSY 0x02
|
|
#define HIL_DATA_RDY 0x01
|
|
|
|
#define HIL_SETARD 0xA0 /* set auto-repeat delay */
|
|
#define HIL_SETARR 0xA2 /* set auto-repeat rate */
|
|
#define HIL_SETTONE 0xA3 /* set tone generator */
|
|
#define HIL_CNMT 0xB2 /* clear nmi */
|
|
#define HIL_INTON 0x5C /* Turn on interrupts. */
|
|
#define HIL_INTOFF 0x5D /* Turn off interrupts. */
|
|
|
|
#define HIL_READKBDSADR 0xF9
|
|
#define HIL_WRITEKBDSADR 0xE9
|
|
|
|
static unsigned int hphilkeyb_keycode[HIL_KEYCODES_SET1_TBLSIZE] __read_mostly =
|
|
{ HIL_KEYCODES_SET1 };
|
|
|
|
/* HIL structure */
|
|
static struct {
|
|
struct input_dev *dev;
|
|
|
|
unsigned int curdev;
|
|
|
|
unsigned char s;
|
|
unsigned char c;
|
|
int valid;
|
|
|
|
unsigned char data[16];
|
|
unsigned int ptr;
|
|
spinlock_t lock;
|
|
|
|
void *dev_id; /* native bus device */
|
|
} hil_dev;
|
|
|
|
|
|
static void poll_finished(void)
|
|
{
|
|
int down;
|
|
int key;
|
|
unsigned char scode;
|
|
|
|
switch (hil_dev.data[0]) {
|
|
case 0x40:
|
|
down = (hil_dev.data[1] & 1) == 0;
|
|
scode = hil_dev.data[1] >> 1;
|
|
key = hphilkeyb_keycode[scode];
|
|
input_report_key(hil_dev.dev, key, down);
|
|
break;
|
|
}
|
|
hil_dev.curdev = 0;
|
|
}
|
|
|
|
|
|
static inline void handle_status(unsigned char s, unsigned char c)
|
|
{
|
|
if (c & 0x8) {
|
|
/* End of block */
|
|
if (c & 0x10)
|
|
poll_finished();
|
|
} else {
|
|
if (c & 0x10) {
|
|
if (hil_dev.curdev)
|
|
poll_finished(); /* just in case */
|
|
hil_dev.curdev = c & 7;
|
|
hil_dev.ptr = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static inline void handle_data(unsigned char s, unsigned char c)
|
|
{
|
|
if (hil_dev.curdev) {
|
|
hil_dev.data[hil_dev.ptr++] = c;
|
|
hil_dev.ptr &= 15;
|
|
}
|
|
}
|
|
|
|
|
|
/* handle HIL interrupts */
|
|
static irqreturn_t hil_interrupt(int irq, void *handle)
|
|
{
|
|
unsigned char s, c;
|
|
|
|
s = hil_status();
|
|
c = hil_read_data();
|
|
|
|
switch (s >> 4) {
|
|
case 0x5:
|
|
handle_status(s, c);
|
|
break;
|
|
case 0x6:
|
|
handle_data(s, c);
|
|
break;
|
|
case 0x4:
|
|
hil_dev.s = s;
|
|
hil_dev.c = c;
|
|
mb();
|
|
hil_dev.valid = 1;
|
|
break;
|
|
}
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
|
|
/* send a command to the HIL */
|
|
static void hil_do(unsigned char cmd, unsigned char *data, unsigned int len)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&hil_dev.lock, flags);
|
|
while (hil_busy())
|
|
/* wait */;
|
|
hil_command(cmd);
|
|
while (len--) {
|
|
while (hil_busy())
|
|
/* wait */;
|
|
hil_write_data(*(data++));
|
|
}
|
|
spin_unlock_irqrestore(&hil_dev.lock, flags);
|
|
}
|
|
|
|
|
|
/* initialize HIL */
|
|
static int hil_keyb_init(void)
|
|
{
|
|
unsigned char c;
|
|
unsigned int i, kbid;
|
|
wait_queue_head_t hil_wait;
|
|
int err;
|
|
|
|
if (hil_dev.dev)
|
|
return -ENODEV; /* already initialized */
|
|
|
|
init_waitqueue_head(&hil_wait);
|
|
spin_lock_init(&hil_dev.lock);
|
|
|
|
hil_dev.dev = input_allocate_device();
|
|
if (!hil_dev.dev)
|
|
return -ENOMEM;
|
|
|
|
err = request_irq(HIL_IRQ, hil_interrupt, 0, "hil", hil_dev.dev_id);
|
|
if (err) {
|
|
printk(KERN_ERR "HIL: Can't get IRQ\n");
|
|
goto err1;
|
|
}
|
|
|
|
/* Turn on interrupts */
|
|
hil_do(HIL_INTON, NULL, 0);
|
|
|
|
/* Look for keyboards */
|
|
hil_dev.valid = 0; /* clear any pending data */
|
|
hil_do(HIL_READKBDSADR, NULL, 0);
|
|
|
|
wait_event_interruptible_timeout(hil_wait, hil_dev.valid, 3 * HZ);
|
|
if (!hil_dev.valid)
|
|
printk(KERN_WARNING "HIL: timed out, assuming no keyboard present\n");
|
|
|
|
c = hil_dev.c;
|
|
hil_dev.valid = 0;
|
|
if (c == 0) {
|
|
kbid = -1;
|
|
printk(KERN_WARNING "HIL: no keyboard present\n");
|
|
} else {
|
|
kbid = ffz(~c);
|
|
printk(KERN_INFO "HIL: keyboard found at id %d\n", kbid);
|
|
}
|
|
|
|
/* set it to raw mode */
|
|
c = 0;
|
|
hil_do(HIL_WRITEKBDSADR, &c, 1);
|
|
|
|
for (i = 0; i < HIL_KEYCODES_SET1_TBLSIZE; i++)
|
|
if (hphilkeyb_keycode[i] != KEY_RESERVED)
|
|
__set_bit(hphilkeyb_keycode[i], hil_dev.dev->keybit);
|
|
|
|
hil_dev.dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
|
|
hil_dev.dev->ledbit[0] = BIT_MASK(LED_NUML) | BIT_MASK(LED_CAPSL) |
|
|
BIT_MASK(LED_SCROLLL);
|
|
hil_dev.dev->keycodemax = HIL_KEYCODES_SET1_TBLSIZE;
|
|
hil_dev.dev->keycodesize= sizeof(hphilkeyb_keycode[0]);
|
|
hil_dev.dev->keycode = hphilkeyb_keycode;
|
|
hil_dev.dev->name = "HIL keyboard";
|
|
hil_dev.dev->phys = "hpkbd/input0";
|
|
|
|
hil_dev.dev->id.bustype = BUS_HIL;
|
|
hil_dev.dev->id.vendor = PCI_VENDOR_ID_HP;
|
|
hil_dev.dev->id.product = 0x0001;
|
|
hil_dev.dev->id.version = 0x0010;
|
|
|
|
err = input_register_device(hil_dev.dev);
|
|
if (err) {
|
|
printk(KERN_ERR "HIL: Can't register device\n");
|
|
goto err2;
|
|
}
|
|
|
|
printk(KERN_INFO "input: %s, ID %d at 0x%08lx (irq %d) found and attached\n",
|
|
hil_dev.dev->name, kbid, HILBASE, HIL_IRQ);
|
|
|
|
return 0;
|
|
|
|
err2:
|
|
hil_do(HIL_INTOFF, NULL, 0);
|
|
free_irq(HIL_IRQ, hil_dev.dev_id);
|
|
err1:
|
|
input_free_device(hil_dev.dev);
|
|
hil_dev.dev = NULL;
|
|
return err;
|
|
}
|
|
|
|
static void hil_keyb_exit(void)
|
|
{
|
|
if (HIL_IRQ)
|
|
free_irq(HIL_IRQ, hil_dev.dev_id);
|
|
|
|
/* Turn off interrupts */
|
|
hil_do(HIL_INTOFF, NULL, 0);
|
|
|
|
input_unregister_device(hil_dev.dev);
|
|
hil_dev.dev = NULL;
|
|
}
|
|
|
|
#if defined(CONFIG_PARISC)
|
|
static int __init hil_probe_chip(struct parisc_device *dev)
|
|
{
|
|
/* Only allow one HIL keyboard */
|
|
if (hil_dev.dev)
|
|
return -ENODEV;
|
|
|
|
if (!dev->irq) {
|
|
printk(KERN_WARNING "HIL: IRQ not found for HIL bus at 0x%p\n",
|
|
(void *)dev->hpa.start);
|
|
return -ENODEV;
|
|
}
|
|
|
|
hil_base = dev->hpa.start;
|
|
hil_irq = dev->irq;
|
|
hil_dev.dev_id = dev;
|
|
|
|
printk(KERN_INFO "Found HIL bus at 0x%08lx, IRQ %d\n", hil_base, hil_irq);
|
|
|
|
return hil_keyb_init();
|
|
}
|
|
|
|
static int __exit hil_remove_chip(struct parisc_device *dev)
|
|
{
|
|
hil_keyb_exit();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct parisc_device_id hil_tbl[] __initconst = {
|
|
{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00073 },
|
|
{ 0, }
|
|
};
|
|
|
|
#if 0
|
|
/* Disabled to avoid conflicts with the HP SDC HIL drivers */
|
|
MODULE_DEVICE_TABLE(parisc, hil_tbl);
|
|
#endif
|
|
|
|
static struct parisc_driver hil_driver __refdata = {
|
|
.name = "hil",
|
|
.id_table = hil_tbl,
|
|
.probe = hil_probe_chip,
|
|
.remove = __exit_p(hil_remove_chip),
|
|
};
|
|
|
|
static int __init hil_init(void)
|
|
{
|
|
return register_parisc_driver(&hil_driver);
|
|
}
|
|
|
|
static void __exit hil_exit(void)
|
|
{
|
|
unregister_parisc_driver(&hil_driver);
|
|
}
|
|
|
|
#else /* !CONFIG_PARISC */
|
|
|
|
static int __init hil_init(void)
|
|
{
|
|
int error;
|
|
|
|
/* Only allow one HIL keyboard */
|
|
if (hil_dev.dev)
|
|
return -EBUSY;
|
|
|
|
if (!MACH_IS_HP300)
|
|
return -ENODEV;
|
|
|
|
if (!hwreg_present((void *)(HILBASE + HIL_DATA))) {
|
|
printk(KERN_ERR "HIL: hardware register was not found\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (!request_region(HILBASE + HIL_DATA, 2, "hil")) {
|
|
printk(KERN_ERR "HIL: IOPORT region already used\n");
|
|
return -EIO;
|
|
}
|
|
|
|
error = hil_keyb_init();
|
|
if (error) {
|
|
release_region(HILBASE + HIL_DATA, 2);
|
|
return error;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit hil_exit(void)
|
|
{
|
|
hil_keyb_exit();
|
|
release_region(HILBASE + HIL_DATA, 2);
|
|
}
|
|
|
|
#endif /* CONFIG_PARISC */
|
|
|
|
module_init(hil_init);
|
|
module_exit(hil_exit);
|