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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>
26#include <linux/io.h>
27#include <linux/sched.h>
28#include <linux/spinlock.h>
29#include <asm/irq.h>
30#ifdef CONFIG_HP300
31#include <asm/hwtest.h>
32#endif
33
34
35MODULE_AUTHOR("Philip Blundell, Matthew Wilcox, Helge Deller");
36MODULE_DESCRIPTION("HIL keyboard driver (basic functionality)");
37MODULE_LICENSE("GPL v2");
38
39
40#if defined(CONFIG_PARISC)
41
42 #include <asm/io.h>
43 #include <asm/hardware.h>
44 #include <asm/parisc-device.h>
45 static unsigned long hil_base;
46 static unsigned int hil_irq;
47 #define HILBASE hil_base
48 #define HIL_DATA 0x800
49 #define HIL_CMD 0x801
50 #define HIL_IRQ hil_irq
51 #define hil_readb(p) gsc_readb(p)
52 #define hil_writeb(v,p) gsc_writeb((v),(p))
53
54#elif defined(CONFIG_HP300)
55
56 #define HILBASE 0xf0428000UL
57 #define HIL_DATA 0x1
58 #define HIL_CMD 0x3
59 #define HIL_IRQ 2
60 #define hil_readb(p) readb(p)
61 #define hil_writeb(v,p) writeb((v),(p))
62
63#else
64#error "HIL is not supported on this platform"
65#endif
66
67
68
69
70
71#define hil_busy() (hil_readb(HILBASE + HIL_CMD) & HIL_BUSY)
72#define hil_data_available() (hil_readb(HILBASE + HIL_CMD) & HIL_DATA_RDY)
73#define hil_status() (hil_readb(HILBASE + HIL_CMD))
74#define hil_command(x) do { hil_writeb((x), HILBASE + HIL_CMD); } while (0)
75#define hil_read_data() (hil_readb(HILBASE + HIL_DATA))
76#define hil_write_data(x) do { hil_writeb((x), HILBASE + HIL_DATA); } while (0)
77
78
79
80#define HIL_BUSY 0x02
81#define HIL_DATA_RDY 0x01
82
83#define HIL_SETARD 0xA0
84#define HIL_SETARR 0xA2
85#define HIL_SETTONE 0xA3
86#define HIL_CNMT 0xB2
87#define HIL_INTON 0x5C
88#define HIL_INTOFF 0x5D
89
90#define HIL_READKBDSADR 0xF9
91#define HIL_WRITEKBDSADR 0xE9
92
93static unsigned int hphilkeyb_keycode[HIL_KEYCODES_SET1_TBLSIZE] __read_mostly =
94 { HIL_KEYCODES_SET1 };
95
96
97static struct {
98 struct input_dev *dev;
99
100 unsigned int curdev;
101
102 unsigned char s;
103 unsigned char c;
104 int valid;
105
106 unsigned char data[16];
107 unsigned int ptr;
108 spinlock_t lock;
109
110 void *dev_id;
111} hil_dev;
112
113
114static void poll_finished(void)
115{
116 int down;
117 int key;
118 unsigned char scode;
119
120 switch (hil_dev.data[0]) {
121 case 0x40:
122 down = (hil_dev.data[1] & 1) == 0;
123 scode = hil_dev.data[1] >> 1;
124 key = hphilkeyb_keycode[scode];
125 input_report_key(hil_dev.dev, key, down);
126 break;
127 }
128 hil_dev.curdev = 0;
129}
130
131
132static inline void handle_status(unsigned char s, unsigned char c)
133{
134 if (c & 0x8) {
135
136 if (c & 0x10)
137 poll_finished();
138 } else {
139 if (c & 0x10) {
140 if (hil_dev.curdev)
141 poll_finished();
142 hil_dev.curdev = c & 7;
143 hil_dev.ptr = 0;
144 }
145 }
146}
147
148
149static inline void handle_data(unsigned char s, unsigned char c)
150{
151 if (hil_dev.curdev) {
152 hil_dev.data[hil_dev.ptr++] = c;
153 hil_dev.ptr &= 15;
154 }
155}
156
157
158
159static irqreturn_t hil_interrupt(int irq, void *handle)
160{
161 unsigned char s, c;
162
163 s = hil_status();
164 c = hil_read_data();
165
166 switch (s >> 4) {
167 case 0x5:
168 handle_status(s, c);
169 break;
170 case 0x6:
171 handle_data(s, c);
172 break;
173 case 0x4:
174 hil_dev.s = s;
175 hil_dev.c = c;
176 mb();
177 hil_dev.valid = 1;
178 break;
179 }
180 return IRQ_HANDLED;
181}
182
183
184
185static void hil_do(unsigned char cmd, unsigned char *data, unsigned int len)
186{
187 unsigned long flags;
188
189 spin_lock_irqsave(&hil_dev.lock, flags);
190 while (hil_busy())
191 ;
192 hil_command(cmd);
193 while (len--) {
194 while (hil_busy())
195 ;
196 hil_write_data(*(data++));
197 }
198 spin_unlock_irqrestore(&hil_dev.lock, flags);
199}
200
201
202
203static int hil_keyb_init(void)
204{
205 unsigned char c;
206 unsigned int i, kbid;
207 wait_queue_head_t hil_wait;
208 int err;
209
210 if (hil_dev.dev)
211 return -ENODEV;
212
213 init_waitqueue_head(&hil_wait);
214 spin_lock_init(&hil_dev.lock);
215
216 hil_dev.dev = input_allocate_device();
217 if (!hil_dev.dev)
218 return -ENOMEM;
219
220 err = request_irq(HIL_IRQ, hil_interrupt, 0, "hil", hil_dev.dev_id);
221 if (err) {
222 printk(KERN_ERR "HIL: Can't get IRQ\n");
223 goto err1;
224 }
225
226
227 hil_do(HIL_INTON, NULL, 0);
228
229
230 hil_dev.valid = 0;
231 hil_do(HIL_READKBDSADR, NULL, 0);
232
233 wait_event_interruptible_timeout(hil_wait, hil_dev.valid, 3 * HZ);
234 if (!hil_dev.valid)
235 printk(KERN_WARNING "HIL: timed out, assuming no keyboard present\n");
236
237 c = hil_dev.c;
238 hil_dev.valid = 0;
239 if (c == 0) {
240 kbid = -1;
241 printk(KERN_WARNING "HIL: no keyboard present\n");
242 } else {
243 kbid = ffz(~c);
244 printk(KERN_INFO "HIL: keyboard found at id %d\n", kbid);
245 }
246
247
248 c = 0;
249 hil_do(HIL_WRITEKBDSADR, &c, 1);
250
251 for (i = 0; i < HIL_KEYCODES_SET1_TBLSIZE; i++)
252 if (hphilkeyb_keycode[i] != KEY_RESERVED)
253 __set_bit(hphilkeyb_keycode[i], hil_dev.dev->keybit);
254
255 hil_dev.dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
256 hil_dev.dev->ledbit[0] = BIT_MASK(LED_NUML) | BIT_MASK(LED_CAPSL) |
257 BIT_MASK(LED_SCROLLL);
258 hil_dev.dev->keycodemax = HIL_KEYCODES_SET1_TBLSIZE;
259 hil_dev.dev->keycodesize= sizeof(hphilkeyb_keycode[0]);
260 hil_dev.dev->keycode = hphilkeyb_keycode;
261 hil_dev.dev->name = "HIL keyboard";
262 hil_dev.dev->phys = "hpkbd/input0";
263
264 hil_dev.dev->id.bustype = BUS_HIL;
265 hil_dev.dev->id.vendor = PCI_VENDOR_ID_HP;
266 hil_dev.dev->id.product = 0x0001;
267 hil_dev.dev->id.version = 0x0010;
268
269 err = input_register_device(hil_dev.dev);
270 if (err) {
271 printk(KERN_ERR "HIL: Can't register device\n");
272 goto err2;
273 }
274
275 printk(KERN_INFO "input: %s, ID %d at 0x%08lx (irq %d) found and attached\n",
276 hil_dev.dev->name, kbid, HILBASE, HIL_IRQ);
277
278 return 0;
279
280err2:
281 hil_do(HIL_INTOFF, NULL, 0);
282 free_irq(HIL_IRQ, hil_dev.dev_id);
283err1:
284 input_free_device(hil_dev.dev);
285 hil_dev.dev = NULL;
286 return err;
287}
288
289static void hil_keyb_exit(void)
290{
291 if (HIL_IRQ)
292 free_irq(HIL_IRQ, hil_dev.dev_id);
293
294
295 hil_do(HIL_INTOFF, NULL, 0);
296
297 input_unregister_device(hil_dev.dev);
298 hil_dev.dev = NULL;
299}
300
301#if defined(CONFIG_PARISC)
302static int hil_probe_chip(struct parisc_device *dev)
303{
304
305 if (hil_dev.dev)
306 return -ENODEV;
307
308 if (!dev->irq) {
309 printk(KERN_WARNING "HIL: IRQ not found for HIL bus at 0x%p\n",
310 (void *)dev->hpa.start);
311 return -ENODEV;
312 }
313
314 hil_base = dev->hpa.start;
315 hil_irq = dev->irq;
316 hil_dev.dev_id = dev;
317
318 printk(KERN_INFO "Found HIL bus at 0x%08lx, IRQ %d\n", hil_base, hil_irq);
319
320 return hil_keyb_init();
321}
322
323static int hil_remove_chip(struct parisc_device *dev)
324{
325 hil_keyb_exit();
326
327 return 0;
328}
329
330static struct parisc_device_id hil_tbl[] = {
331 { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00073 },
332 { 0, }
333};
334
335#if 0
336
337MODULE_DEVICE_TABLE(parisc, hil_tbl);
338#endif
339
340static struct parisc_driver hil_driver = {
341 .name = "hil",
342 .id_table = hil_tbl,
343 .probe = hil_probe_chip,
344 .remove = hil_remove_chip,
345};
346
347static int __init hil_init(void)
348{
349 return register_parisc_driver(&hil_driver);
350}
351
352static void __exit hil_exit(void)
353{
354 unregister_parisc_driver(&hil_driver);
355}
356
357#else
358
359static int __init hil_init(void)
360{
361 int error;
362
363
364 if (hil_dev.dev)
365 return -EBUSY;
366
367 if (!MACH_IS_HP300)
368 return -ENODEV;
369
370 if (!hwreg_present((void *)(HILBASE + HIL_DATA))) {
371 printk(KERN_ERR "HIL: hardware register was not found\n");
372 return -ENODEV;
373 }
374
375 if (!request_region(HILBASE + HIL_DATA, 2, "hil")) {
376 printk(KERN_ERR "HIL: IOPORT region already used\n");
377 return -EIO;
378 }
379
380 error = hil_keyb_init();
381 if (error) {
382 release_region(HILBASE + HIL_DATA, 2);
383 return error;
384 }
385
386 return 0;
387}
388
389static void __exit hil_exit(void)
390{
391 hil_keyb_exit();
392 release_region(HILBASE + HIL_DATA, 2);
393}
394
395#endif
396
397module_init(hil_init);
398module_exit(hil_exit);
399
