2 * linux/drivers/hil/hilkbd.c
4 * Copyright (C) 1998 Philip Blundell <philb@gnu.org>
5 * Copyright (C) 1999 Matthew Wilcox <willy@bofh.ai>
6 * Copyright (C) 1999-2007 Helge Deller <deller@gmx.de>
8 * Very basic HP Human Interface Loop (HIL) driver.
9 * This driver handles the keyboard on HP300 (m68k) and on some
10 * HP700 (parisc) series machines.
13 * This file is subject to the terms and conditions of the GNU General Public
14 * License version 2. See the file COPYING in the main directory of this
15 * archive for more details.
18 #include <linux/pci_ids.h>
19 #include <linux/ioport.h>
20 #include <linux/module.h>
21 #include <linux/errno.h>
22 #include <linux/input.h>
23 #include <linux/init.h>
24 #include <linux/interrupt.h>
25 #include <linux/hil.h>
27 #include <linux/spinlock.h>
30 #include <asm/hwtest.h>
34 MODULE_AUTHOR("Philip Blundell, Matthew Wilcox, Helge Deller");
35 MODULE_DESCRIPTION("HIL keyboard driver (basic functionality)");
36 MODULE_LICENSE("GPL v2");
39 #if defined(CONFIG_PARISC)
42 #include <asm/hardware.h>
43 #include <asm/parisc-device.h>
44 static unsigned long hil_base; /* HPA for the HIL device */
45 static unsigned int hil_irq;
46 #define HILBASE hil_base /* HPPA (parisc) port address */
47 #define HIL_DATA 0x800
49 #define HIL_IRQ hil_irq
50 #define hil_readb(p) gsc_readb(p)
51 #define hil_writeb(v,p) gsc_writeb((v),(p))
53 #elif defined(CONFIG_HP300)
55 #define HILBASE 0xf0428000UL /* HP300 (m68k) port address */
59 #define hil_readb(p) readb(p)
60 #define hil_writeb(v,p) writeb((v),(p))
63 #error "HIL is not supported on this platform"
68 /* HIL helper functions */
70 #define hil_busy() (hil_readb(HILBASE + HIL_CMD) & HIL_BUSY)
71 #define hil_data_available() (hil_readb(HILBASE + HIL_CMD) & HIL_DATA_RDY)
72 #define hil_status() (hil_readb(HILBASE + HIL_CMD))
73 #define hil_command(x) do { hil_writeb((x), HILBASE + HIL_CMD); } while (0)
74 #define hil_read_data() (hil_readb(HILBASE + HIL_DATA))
75 #define hil_write_data(x) do { hil_writeb((x), HILBASE + HIL_DATA); } while (0)
80 #define HIL_DATA_RDY 0x01
82 #define HIL_SETARD 0xA0 /* set auto-repeat delay */
83 #define HIL_SETARR 0xA2 /* set auto-repeat rate */
84 #define HIL_SETTONE 0xA3 /* set tone generator */
85 #define HIL_CNMT 0xB2 /* clear nmi */
86 #define HIL_INTON 0x5C /* Turn on interrupts. */
87 #define HIL_INTOFF 0x5D /* Turn off interrupts. */
89 #define HIL_READKBDSADR 0xF9
90 #define HIL_WRITEKBDSADR 0xE9
92 static unsigned int hphilkeyb_keycode[HIL_KEYCODES_SET1_TBLSIZE] __read_mostly =
93 { HIL_KEYCODES_SET1 };
97 struct input_dev *dev;
105 unsigned char data[16];
109 void *dev_id; /* native bus device */
113 static void poll_finished(void)
119 switch (hil_dev.data[0]) {
121 down = (hil_dev.data[1] & 1) == 0;
122 scode = hil_dev.data[1] >> 1;
123 key = hphilkeyb_keycode[scode];
124 input_report_key(hil_dev.dev, key, down);
131 static inline void handle_status(unsigned char s, unsigned char c)
140 poll_finished(); /* just in case */
141 hil_dev.curdev = c & 7;
148 static inline void handle_data(unsigned char s, unsigned char c)
150 if (hil_dev.curdev) {
151 hil_dev.data[hil_dev.ptr++] = c;
157 /* handle HIL interrupts */
158 static irqreturn_t hil_interrupt(int irq, void *handle)
183 /* send a command to the HIL */
184 static void hil_do(unsigned char cmd, unsigned char *data, unsigned int len)
188 spin_lock_irqsave(&hil_dev.lock, flags);
195 hil_write_data(*(data++));
197 spin_unlock_irqrestore(&hil_dev.lock, flags);
206 unsigned int i, kbid;
207 wait_queue_head_t hil_wait;
211 return -ENODEV; /* already initialized */
214 spin_lock_init(&hil_dev.lock);
215 hil_dev.dev = input_allocate_device();
219 #if defined(CONFIG_HP300)
220 if (!hwreg_present((void *)(HILBASE + HIL_DATA))) {
221 printk(KERN_ERR "HIL: hardware register was not found\n");
225 if (!request_region(HILBASE + HIL_DATA, 2, "hil")) {
226 printk(KERN_ERR "HIL: IOPORT region already used\n");
232 err = request_irq(HIL_IRQ, hil_interrupt, 0, "hil", hil_dev.dev_id);
234 printk(KERN_ERR "HIL: Can't get IRQ\n");
238 /* Turn on interrupts */
239 hil_do(HIL_INTON, NULL, 0);
241 /* Look for keyboards */
242 hil_dev.valid = 0; /* clear any pending data */
243 hil_do(HIL_READKBDSADR, NULL, 0);
245 init_waitqueue_head(&hil_wait);
246 wait_event_interruptible_timeout(hil_wait, hil_dev.valid, 3*HZ);
247 if (!hil_dev.valid) {
248 printk(KERN_WARNING "HIL: timed out, assuming no keyboard present\n");
255 printk(KERN_WARNING "HIL: no keyboard present\n");
258 printk(KERN_INFO "HIL: keyboard found at id %d\n", kbid);
261 /* set it to raw mode */
263 hil_do(HIL_WRITEKBDSADR, &c, 1);
265 for (i = 0; i < HIL_KEYCODES_SET1_TBLSIZE; i++)
266 if (hphilkeyb_keycode[i] != KEY_RESERVED)
267 set_bit(hphilkeyb_keycode[i], hil_dev.dev->keybit);
269 hil_dev.dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
270 hil_dev.dev->ledbit[0] = BIT(LED_NUML) | BIT(LED_CAPSL) | BIT(LED_SCROLLL);
271 hil_dev.dev->keycodemax = HIL_KEYCODES_SET1_TBLSIZE;
272 hil_dev.dev->keycodesize= sizeof(hphilkeyb_keycode[0]);
273 hil_dev.dev->keycode = hphilkeyb_keycode;
274 hil_dev.dev->name = "HIL keyboard";
275 hil_dev.dev->phys = "hpkbd/input0";
277 hil_dev.dev->id.bustype = BUS_HIL;
278 hil_dev.dev->id.vendor = PCI_VENDOR_ID_HP;
279 hil_dev.dev->id.product = 0x0001;
280 hil_dev.dev->id.version = 0x0010;
282 err = input_register_device(hil_dev.dev);
284 printk(KERN_ERR "HIL: Can't register device\n");
287 printk(KERN_INFO "input: %s, ID %d at 0x%08lx (irq %d) found and attached\n",
288 hil_dev.dev->name, kbid, HILBASE, HIL_IRQ);
293 hil_do(HIL_INTOFF, NULL, 0);
294 disable_irq(HIL_IRQ);
295 free_irq(HIL_IRQ, hil_dev.dev_id);
297 #if defined(CONFIG_HP300)
298 release_region(HILBASE + HIL_DATA, 2);
301 input_free_device(hil_dev.dev);
307 #if defined(CONFIG_PARISC)
309 hil_init_chip(struct parisc_device *dev)
312 printk(KERN_WARNING "HIL: IRQ not found for HIL bus at 0x%08lx\n", dev->hpa.start);
316 hil_base = dev->hpa.start;
318 hil_dev.dev_id = dev;
320 printk(KERN_INFO "Found HIL bus at 0x%08lx, IRQ %d\n", hil_base, hil_irq);
322 return hil_keyb_init();
325 static struct parisc_device_id hil_tbl[] = {
326 { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00073 },
330 MODULE_DEVICE_TABLE(parisc, hil_tbl);
332 static struct parisc_driver hil_driver = {
335 .probe = hil_init_chip,
337 #endif /* CONFIG_PARISC */
340 static int __init hil_init(void)
342 #if defined(CONFIG_PARISC)
343 return register_parisc_driver(&hil_driver);
345 return hil_keyb_init();
350 static void __exit hil_exit(void)
353 disable_irq(HIL_IRQ);
354 free_irq(HIL_IRQ, hil_dev.dev_id);
357 /* Turn off interrupts */
358 hil_do(HIL_INTOFF, NULL, 0);
360 input_unregister_device(hil_dev.dev);
364 #if defined(CONFIG_PARISC)
365 unregister_parisc_driver(&hil_driver);
367 release_region(HILBASE+HIL_DATA, 2);
371 module_init(hil_init);
372 module_exit(hil_exit);