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) 1999-2006 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/config.h>
22 #include <linux/errno.h>
23 #include <linux/input.h>
24 #include <linux/init.h>
25 #include <linux/interrupt.h>
26 #include <linux/hil.h>
27 #include <linux/spinlock.h>
30 MODULE_AUTHOR("Philip Blundell, Matthew Wilcox, Helge Deller");
31 MODULE_DESCRIPTION("HIL keyboard driver (basic functionality)");
32 MODULE_LICENSE("GPL v2");
35 #if defined(CONFIG_PARISC)
38 #include <asm/hardware.h>
39 #include <asm/parisc-device.h>
40 static unsigned long hil_base; /* HPA for the HIL device */
41 static unsigned int hil_irq;
42 #define HILBASE hil_base /* HPPA (parisc) port address */
43 #define HIL_DATA 0x800
45 #define HIL_IRQ hil_irq
46 #define hil_readb(p) gsc_readb(p)
47 #define hil_writeb(v,p) gsc_writeb((v),(p))
49 #elif defined(CONFIG_HP300)
51 #define HILBASE 0xf0428000 /* HP300 (m86k) port address */
55 #define hil_readb(p) readb(p)
56 #define hil_writeb(v,p) writeb((v),(p))
59 #error "HIL is not supported on this platform"
64 /* HIL helper functions */
66 #define hil_busy() (hil_readb(HILBASE + HIL_CMD) & HIL_BUSY)
67 #define hil_data_available() (hil_readb(HILBASE + HIL_CMD) & HIL_DATA_RDY)
68 #define hil_status() (hil_readb(HILBASE + HIL_CMD))
69 #define hil_command(x) do { hil_writeb((x), HILBASE + HIL_CMD); } while (0)
70 #define hil_read_data() (hil_readb(HILBASE + HIL_DATA))
71 #define hil_write_data(x) do { hil_writeb((x), HILBASE + HIL_DATA); } while (0)
76 #define HIL_DATA_RDY 0x01
78 #define HIL_SETARD 0xA0 /* set auto-repeat delay */
79 #define HIL_SETARR 0xA2 /* set auto-repeat rate */
80 #define HIL_SETTONE 0xA3 /* set tone generator */
81 #define HIL_CNMT 0xB2 /* clear nmi */
82 #define HIL_INTON 0x5C /* Turn on interrupts. */
83 #define HIL_INTOFF 0x5D /* Turn off interrupts. */
85 #define HIL_READKBDSADR 0xF9
86 #define HIL_WRITEKBDSADR 0xE9
88 static unsigned int hphilkeyb_keycode[HIL_KEYCODES_SET1_TBLSIZE] =
89 { HIL_KEYCODES_SET1 };
93 struct input_dev *dev;
101 unsigned char data[16];
105 void *dev_id; /* native bus device */
109 static void poll_finished(void)
115 switch (hil_dev.data[0]) {
117 down = (hil_dev.data[1] & 1) == 0;
118 scode = hil_dev.data[1] >> 1;
119 key = hphilkeyb_keycode[scode];
120 input_report_key(hil_dev.dev, key, down);
126 static inline void handle_status(unsigned char s, unsigned char c)
135 poll_finished(); /* just in case */
136 hil_dev.curdev = c & 7;
142 static inline void handle_data(unsigned char s, unsigned char c)
144 if (hil_dev.curdev) {
145 hil_dev.data[hil_dev.ptr++] = c;
152 * Handle HIL interrupts.
154 static irqreturn_t hil_interrupt(int irq, void *handle, struct pt_regs *regs)
179 * Send a command to the HIL
182 static void hil_do(unsigned char cmd, unsigned char *data, unsigned int len)
186 spin_lock_irqsave(&hil_dev.lock, flags);
193 hil_write_data(*(data++));
195 spin_unlock_irqrestore(&hil_dev.lock, flags);
207 unsigned int i, kbid;
208 wait_queue_head_t hil_wait;
211 return -ENODEV; /* already initialized */
214 hil_dev.dev = input_allocate_device();
217 hil_dev.dev->private = &hil_dev;
219 #if defined(CONFIG_HP300)
220 if (!hwreg_present((void *)(HILBASE + HIL_DATA)))
223 request_region(HILBASE+HIL_DATA, 2, "hil");
226 request_irq(HIL_IRQ, hil_interrupt, 0, "hil", hil_dev.dev_id);
228 /* Turn on interrupts */
229 hil_do(HIL_INTON, NULL, 0);
231 /* Look for keyboards */
232 hil_dev.valid = 0; /* clear any pending data */
233 hil_do(HIL_READKBDSADR, NULL, 0);
235 init_waitqueue_head(&hil_wait);
236 wait_event_interruptible_timeout(hil_wait, hil_dev.valid, 3*HZ);
237 if (!hil_dev.valid) {
238 printk(KERN_WARNING "HIL: timed out, assuming no keyboard present.\n");
245 printk(KERN_WARNING "HIL: no keyboard present.\n");
248 /* printk(KERN_INFO "HIL: keyboard found at id %d\n", kbid); */
251 /* set it to raw mode */
253 hil_do(HIL_WRITEKBDSADR, &c, 1);
255 for (i = 0; i < HIL_KEYCODES_SET1_TBLSIZE; i++)
256 if (hphilkeyb_keycode[i] != KEY_RESERVED)
257 set_bit(hphilkeyb_keycode[i], hil_dev.dev->keybit);
259 hil_dev.dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
260 hil_dev.dev->ledbit[0] = BIT(LED_NUML) | BIT(LED_CAPSL) | BIT(LED_SCROLLL);
261 hil_dev.dev->keycodemax = HIL_KEYCODES_SET1_TBLSIZE;
262 hil_dev.dev->keycodesize = sizeof(hphilkeyb_keycode[0]);
263 hil_dev.dev->keycode = hphilkeyb_keycode;
264 hil_dev.dev->name = "HIL keyboard";
265 hil_dev.dev->phys = "hpkbd/input0";
267 hil_dev.dev->id.bustype = BUS_HIL;
268 hil_dev.dev->id.vendor = PCI_VENDOR_ID_HP;
269 hil_dev.dev->id.product = 0x0001;
270 hil_dev.dev->id.version = 0x0010;
272 input_register_device(hil_dev.dev);
273 printk(KERN_INFO "input: %s, ID %d at 0x%08lx (irq %d) found and attached\n",
274 hil_dev.dev->name, kbid, HILBASE, HIL_IRQ);
279 #if defined(CONFIG_PARISC)
281 hil_init_chip(struct parisc_device *dev)
284 printk(KERN_WARNING "HIL: IRQ not found for HIL bus at 0x%08lx\n", dev->hpa.start);
288 hil_base = dev->hpa.start;
290 hil_dev.dev_id = dev;
292 printk(KERN_INFO "Found HIL bus at 0x%08lx, IRQ %d\n", hil_base, hil_irq);
294 return hil_keyb_init();
297 static struct parisc_device_id hil_tbl[] = {
298 { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00073 },
302 MODULE_DEVICE_TABLE(parisc, hil_tbl);
304 static struct parisc_driver hil_driver = {
307 .probe = hil_init_chip,
309 #endif /* CONFIG_PARISC */
315 static int __init hil_init(void)
317 #if defined(CONFIG_PARISC)
318 return register_parisc_driver(&hil_driver);
320 return hil_keyb_init();
325 static void __exit hil_exit(void)
328 disable_irq(HIL_IRQ);
329 free_irq(HIL_IRQ, hil_dev.dev_id);
332 /* Turn off interrupts */
333 hil_do(HIL_INTOFF, NULL, 0);
335 input_unregister_device(hil_dev.dev);
339 #if defined(CONFIG_PARISC)
340 unregister_parisc_driver(&hil_driver);
342 release_region(HILBASE+HIL_DATA, 2);
346 module_init(hil_init);
347 module_exit(hil_exit);