Merge branch 'e1000-fixes' of git://198.78.49.142/~jbrandeb/linux-2.6
[linux-2.6] / drivers / media / video / cx88 / cx88-input.c
1 /*
2  *
3  * Device driver for GPIO attached remote control interfaces
4  * on Conexant 2388x based TV/DVB cards.
5  *
6  * Copyright (c) 2003 Pavel Machek
7  * Copyright (c) 2004 Gerd Knorr
8  * Copyright (c) 2004, 2005 Chris Pascoe
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License as published by
12  * the Free Software Foundation; either version 2 of the License, or
13  * (at your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23  */
24
25 #include <linux/init.h>
26 #include <linux/delay.h>
27 #include <linux/input.h>
28 #include <linux/pci.h>
29 #include <linux/module.h>
30 #include <linux/moduleparam.h>
31
32 #include "cx88.h"
33 #include <media/ir-common.h>
34
35 /* ---------------------------------------------------------------------- */
36
37 struct cx88_IR {
38         struct cx88_core *core;
39         struct input_dev *input;
40         struct ir_input_state ir;
41         char name[32];
42         char phys[32];
43
44         /* sample from gpio pin 16 */
45         u32 sampling;
46         u32 samples[16];
47         int scount;
48         unsigned long release;
49
50         /* poll external decoder */
51         int polling;
52         struct work_struct work;
53         struct timer_list timer;
54         u32 gpio_addr;
55         u32 last_gpio;
56         u32 mask_keycode;
57         u32 mask_keydown;
58         u32 mask_keyup;
59 };
60
61 static int ir_debug = 0;
62 module_param(ir_debug, int, 0644);      /* debug level [IR] */
63 MODULE_PARM_DESC(ir_debug, "enable debug messages [IR]");
64
65 #define ir_dprintk(fmt, arg...) if (ir_debug) \
66         printk(KERN_DEBUG "%s IR: " fmt , ir->core->name , ##arg)
67
68 /* ---------------------------------------------------------------------- */
69
70 static void cx88_ir_handle_key(struct cx88_IR *ir)
71 {
72         struct cx88_core *core = ir->core;
73         u32 gpio, data;
74
75         /* read gpio value */
76         gpio = cx_read(ir->gpio_addr);
77         if (ir->polling) {
78                 if (ir->last_gpio == gpio)
79                         return;
80                 ir->last_gpio = gpio;
81         }
82
83         /* extract data */
84         data = ir_extract_bits(gpio, ir->mask_keycode);
85         ir_dprintk("irq gpio=0x%x code=%d | %s%s%s\n",
86                    gpio, data,
87                    ir->polling ? "poll" : "irq",
88                    (gpio & ir->mask_keydown) ? " down" : "",
89                    (gpio & ir->mask_keyup) ? " up" : "");
90
91         if (ir->mask_keydown) {
92                 /* bit set on keydown */
93                 if (gpio & ir->mask_keydown) {
94                         ir_input_keydown(ir->input, &ir->ir, data, data);
95                 } else {
96                         ir_input_nokey(ir->input, &ir->ir);
97                 }
98
99         } else if (ir->mask_keyup) {
100                 /* bit cleared on keydown */
101                 if (0 == (gpio & ir->mask_keyup)) {
102                         ir_input_keydown(ir->input, &ir->ir, data, data);
103                 } else {
104                         ir_input_nokey(ir->input, &ir->ir);
105                 }
106
107         } else {
108                 /* can't distinguish keydown/up :-/ */
109                 ir_input_keydown(ir->input, &ir->ir, data, data);
110                 ir_input_nokey(ir->input, &ir->ir);
111         }
112 }
113
114 static void ir_timer(unsigned long data)
115 {
116         struct cx88_IR *ir = (struct cx88_IR *)data;
117
118         schedule_work(&ir->work);
119 }
120
121 static void cx88_ir_work(void *data)
122 {
123         struct cx88_IR *ir = data;
124         unsigned long timeout;
125
126         cx88_ir_handle_key(ir);
127         timeout = jiffies + (ir->polling * HZ / 1000);
128         mod_timer(&ir->timer, timeout);
129 }
130
131 /* ---------------------------------------------------------------------- */
132
133 int cx88_ir_init(struct cx88_core *core, struct pci_dev *pci)
134 {
135         struct cx88_IR *ir;
136         struct input_dev *input_dev;
137         IR_KEYTAB_TYPE *ir_codes = NULL;
138         int ir_type = IR_TYPE_OTHER;
139
140         ir = kzalloc(sizeof(*ir), GFP_KERNEL);
141         input_dev = input_allocate_device();
142         if (!ir || !input_dev) {
143                 kfree(ir);
144                 input_free_device(input_dev);
145                 return -ENOMEM;
146         }
147
148         ir->input = input_dev;
149
150         /* detect & configure */
151         switch (core->board) {
152         case CX88_BOARD_DNTV_LIVE_DVB_T:
153         case CX88_BOARD_KWORLD_DVB_T:
154         case CX88_BOARD_KWORLD_DVB_T_CX22702:
155                 ir_codes = ir_codes_dntv_live_dvb_t;
156                 ir->gpio_addr = MO_GP1_IO;
157                 ir->mask_keycode = 0x1f;
158                 ir->mask_keyup = 0x60;
159                 ir->polling = 50; /* ms */
160                 break;
161         case CX88_BOARD_TERRATEC_CINERGY_1400_DVB_T1:
162                 ir_codes = ir_codes_cinergy_1400;
163                 ir_type = IR_TYPE_PD;
164                 ir->sampling = 0xeb04; /* address */
165                 break;
166         case CX88_BOARD_HAUPPAUGE:
167         case CX88_BOARD_HAUPPAUGE_DVB_T1:
168         case CX88_BOARD_HAUPPAUGE_NOVASE2_S1:
169         case CX88_BOARD_HAUPPAUGE_NOVASPLUS_S1:
170         case CX88_BOARD_HAUPPAUGE_HVR1100:
171                 ir_codes = ir_codes_hauppauge_new;
172                 ir_type = IR_TYPE_RC5;
173                 ir->sampling = 1;
174                 break;
175         case CX88_BOARD_WINFAST2000XP_EXPERT:
176                 ir_codes = ir_codes_winfast;
177                 ir->gpio_addr = MO_GP0_IO;
178                 ir->mask_keycode = 0x8f8;
179                 ir->mask_keyup = 0x100;
180                 ir->polling = 1; /* ms */
181                 break;
182         case CX88_BOARD_IODATA_GVBCTV7E:
183                 ir_codes = ir_codes_iodata_bctv7e;
184                 ir->gpio_addr = MO_GP0_IO;
185                 ir->mask_keycode = 0xfd;
186                 ir->mask_keydown = 0x02;
187                 ir->polling = 5; /* ms */
188                 break;
189        case CX88_BOARD_PROLINK_PLAYTVPVR:
190         case CX88_BOARD_PIXELVIEW_PLAYTV_ULTRA_PRO:
191                 ir_codes = ir_codes_pixelview;
192                 ir->gpio_addr = MO_GP1_IO;
193                 ir->mask_keycode = 0x1f;
194                 ir->mask_keyup = 0x80;
195                 ir->polling = 1; /* ms */
196                 break;
197         case CX88_BOARD_KWORLD_LTV883:
198                 ir_codes = ir_codes_pixelview;
199                 ir->gpio_addr = MO_GP1_IO;
200                 ir->mask_keycode = 0x1f;
201                 ir->mask_keyup = 0x60;
202                 ir->polling = 1; /* ms */
203                 break;
204         case CX88_BOARD_ADSTECH_DVB_T_PCI:
205                 ir_codes = ir_codes_adstech_dvb_t_pci;
206                 ir->gpio_addr = MO_GP1_IO;
207                 ir->mask_keycode = 0xbf;
208                 ir->mask_keyup = 0x40;
209                 ir->polling = 50; /* ms */
210                 break;
211         case CX88_BOARD_MSI_TVANYWHERE_MASTER:
212                 ir_codes = ir_codes_msi_tvanywhere;
213                 ir->gpio_addr = MO_GP1_IO;
214                 ir->mask_keycode = 0x1f;
215                 ir->mask_keyup = 0x40;
216                 ir->polling = 1; /* ms */
217                 break;
218         case CX88_BOARD_AVERTV_303:
219         case CX88_BOARD_AVERTV_STUDIO_303:
220                 ir_codes         = ir_codes_avertv_303;
221                 ir->gpio_addr    = MO_GP2_IO;
222                 ir->mask_keycode = 0xfb;
223                 ir->mask_keydown = 0x02;
224                 ir->polling      = 50; /* ms */
225                 break;
226         case CX88_BOARD_DNTV_LIVE_DVB_T_PRO:
227                 ir_codes = ir_codes_dntv_live_dvbt_pro;
228                 ir_type = IR_TYPE_PD;
229                 ir->sampling = 0xff00; /* address */
230                 break;
231         }
232
233         if (NULL == ir_codes) {
234                 kfree(ir);
235                 input_free_device(input_dev);
236                 return -ENODEV;
237         }
238
239         /* init input device */
240         snprintf(ir->name, sizeof(ir->name), "cx88 IR (%s)",
241                  cx88_boards[core->board].name);
242         snprintf(ir->phys, sizeof(ir->phys), "pci-%s/ir0", pci_name(pci));
243
244         ir_input_init(input_dev, &ir->ir, ir_type, ir_codes);
245         input_dev->name = ir->name;
246         input_dev->phys = ir->phys;
247         input_dev->id.bustype = BUS_PCI;
248         input_dev->id.version = 1;
249         if (pci->subsystem_vendor) {
250                 input_dev->id.vendor = pci->subsystem_vendor;
251                 input_dev->id.product = pci->subsystem_device;
252         } else {
253                 input_dev->id.vendor = pci->vendor;
254                 input_dev->id.product = pci->device;
255         }
256         input_dev->cdev.dev = &pci->dev;
257         /* record handles to ourself */
258         ir->core = core;
259         core->ir = ir;
260
261         if (ir->polling) {
262                 INIT_WORK(&ir->work, cx88_ir_work, ir);
263                 init_timer(&ir->timer);
264                 ir->timer.function = ir_timer;
265                 ir->timer.data = (unsigned long)ir;
266                 schedule_work(&ir->work);
267         }
268         if (ir->sampling) {
269                 core->pci_irqmask |= (1 << 18); /* IR_SMP_INT */
270                 cx_write(MO_DDS_IO, 0xa80a80);  /* 4 kHz sample rate */
271                 cx_write(MO_DDSCFG_IO, 0x5);    /* enable */
272         }
273
274         /* all done */
275         input_register_device(ir->input);
276
277         return 0;
278 }
279
280 int cx88_ir_fini(struct cx88_core *core)
281 {
282         struct cx88_IR *ir = core->ir;
283
284         /* skip detach on non attached boards */
285         if (NULL == ir)
286                 return 0;
287
288         if (ir->sampling) {
289                 cx_write(MO_DDSCFG_IO, 0x0);
290                 core->pci_irqmask &= ~(1 << 18);
291         }
292         if (ir->polling) {
293                 del_timer(&ir->timer);
294                 flush_scheduled_work();
295         }
296
297         input_unregister_device(ir->input);
298         kfree(ir);
299
300         /* done */
301         core->ir = NULL;
302         return 0;
303 }
304
305 /* ---------------------------------------------------------------------- */
306
307 void cx88_ir_irq(struct cx88_core *core)
308 {
309         struct cx88_IR *ir = core->ir;
310         u32 samples, ircode;
311         int i;
312
313         if (NULL == ir)
314                 return;
315         if (!ir->sampling)
316                 return;
317
318         samples = cx_read(MO_SAMPLE_IO);
319         if (0 != samples && 0xffffffff != samples) {
320                 /* record sample data */
321                 if (ir->scount < ARRAY_SIZE(ir->samples))
322                         ir->samples[ir->scount++] = samples;
323                 return;
324         }
325         if (!ir->scount) {
326                 /* nothing to sample */
327                 if (ir->ir.keypressed && time_after(jiffies, ir->release))
328                         ir_input_nokey(ir->input, &ir->ir);
329                 return;
330         }
331
332         /* have a complete sample */
333         if (ir->scount < ARRAY_SIZE(ir->samples))
334                 ir->samples[ir->scount++] = samples;
335         for (i = 0; i < ir->scount; i++)
336                 ir->samples[i] = ~ir->samples[i];
337         if (ir_debug)
338                 ir_dump_samples(ir->samples, ir->scount);
339
340         /* decode it */
341         switch (core->board) {
342         case CX88_BOARD_TERRATEC_CINERGY_1400_DVB_T1:
343         case CX88_BOARD_DNTV_LIVE_DVB_T_PRO:
344                 ircode = ir_decode_pulsedistance(ir->samples, ir->scount, 1, 4);
345
346                 if (ircode == 0xffffffff) { /* decoding error */
347                         ir_dprintk("pulse distance decoding error\n");
348                         break;
349                 }
350
351                 ir_dprintk("pulse distance decoded: %x\n", ircode);
352
353                 if (ircode == 0) { /* key still pressed */
354                         ir_dprintk("pulse distance decoded repeat code\n");
355                         ir->release = jiffies + msecs_to_jiffies(120);
356                         break;
357                 }
358
359                 if ((ircode & 0xffff) != (ir->sampling & 0xffff)) { /* wrong address */
360                         ir_dprintk("pulse distance decoded wrong address\n");
361                         break;
362                 }
363
364                 if (((~ircode >> 24) & 0xff) != ((ircode >> 16) & 0xff)) { /* wrong checksum */
365                         ir_dprintk("pulse distance decoded wrong check sum\n");
366                         break;
367                 }
368
369                 ir_dprintk("Key Code: %x\n", (ircode >> 16) & 0x7f);
370
371                 ir_input_keydown(ir->input, &ir->ir, (ircode >> 16) & 0x7f, (ircode >> 16) & 0xff);
372                 ir->release = jiffies + msecs_to_jiffies(120);
373                 break;
374         case CX88_BOARD_HAUPPAUGE:
375         case CX88_BOARD_HAUPPAUGE_DVB_T1:
376         case CX88_BOARD_HAUPPAUGE_NOVASE2_S1:
377         case CX88_BOARD_HAUPPAUGE_NOVASPLUS_S1:
378         case CX88_BOARD_HAUPPAUGE_HVR1100:
379                 ircode = ir_decode_biphase(ir->samples, ir->scount, 5, 7);
380                 ir_dprintk("biphase decoded: %x\n", ircode);
381                 if ((ircode & 0xfffff000) != 0x3000)
382                         break;
383                 ir_input_keydown(ir->input, &ir->ir, ircode & 0x3f, ircode);
384                 ir->release = jiffies + msecs_to_jiffies(120);
385                 break;
386         }
387
388         ir->scount = 0;
389         return;
390 }
391
392 /* ---------------------------------------------------------------------- */
393
394 MODULE_AUTHOR("Gerd Knorr, Pavel Machek, Chris Pascoe");
395 MODULE_DESCRIPTION("input driver for cx88 GPIO-based IR remote controls");
396 MODULE_LICENSE("GPL");
397 /*
398  * Local variables:
399  * c-basic-offset: 8
400  * End:
401  */