Merge master.kernel.org:/pub/scm/linux/kernel/git/sfrench/cifs-2.6
[pandora-kernel.git] / drivers / media / video / bt8xx / bttv-input.c
1 /*
2  *
3  * Copyright (c) 2003 Gerd Knorr
4  * Copyright (c) 2003 Pavel Machek
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19  */
20
21 #include <linux/module.h>
22 #include <linux/moduleparam.h>
23 #include <linux/init.h>
24 #include <linux/delay.h>
25 #include <linux/interrupt.h>
26 #include <linux/input.h>
27
28 #include "bttv.h"
29 #include "bttvp.h"
30
31
32 static int debug;
33 module_param(debug, int, 0644);    /* debug level (0,1,2) */
34 static int repeat_delay = 500;
35 module_param(repeat_delay, int, 0644);
36 static int repeat_period = 33;
37 module_param(repeat_period, int, 0644);
38
39 static int ir_rc5_remote_gap = 885;
40 module_param(ir_rc5_remote_gap, int, 0644);
41 static int ir_rc5_key_timeout = 200;
42 module_param(ir_rc5_key_timeout, int, 0644);
43
44 #define DEVNAME "bttv-input"
45
46 /* ---------------------------------------------------------------------- */
47
48 static void ir_handle_key(struct bttv *btv)
49 {
50         struct card_ir *ir = btv->remote;
51         u32 gpio,data;
52
53         /* read gpio value */
54         gpio = bttv_gpio_read(&btv->c);
55         if (ir->polling) {
56                 if (ir->last_gpio == gpio)
57                         return;
58                 ir->last_gpio = gpio;
59         }
60
61         /* extract data */
62         data = ir_extract_bits(gpio, ir->mask_keycode);
63         dprintk(KERN_INFO DEVNAME ": irq gpio=0x%x code=%d | %s%s%s\n",
64                 gpio, data,
65                 ir->polling               ? "poll"  : "irq",
66                 (gpio & ir->mask_keydown) ? " down" : "",
67                 (gpio & ir->mask_keyup)   ? " up"   : "");
68
69         if ((ir->mask_keydown  &&  (0 != (gpio & ir->mask_keydown))) ||
70             (ir->mask_keyup    &&  (0 == (gpio & ir->mask_keyup)))) {
71                 ir_input_keydown(ir->dev,&ir->ir,data,data);
72         } else {
73                 ir_input_nokey(ir->dev,&ir->ir);
74         }
75
76 }
77
78 void bttv_input_irq(struct bttv *btv)
79 {
80         struct card_ir *ir = btv->remote;
81
82         if (!ir->polling)
83                 ir_handle_key(btv);
84 }
85
86 static void bttv_input_timer(unsigned long data)
87 {
88         struct bttv *btv = (struct bttv*)data;
89         struct card_ir *ir = btv->remote;
90
91         ir_handle_key(btv);
92         mod_timer(&ir->timer, jiffies + msecs_to_jiffies(ir->polling));
93 }
94
95 /* ---------------------------------------------------------------*/
96
97 static int bttv_rc5_irq(struct bttv *btv)
98 {
99         struct card_ir *ir = btv->remote;
100         struct timeval tv;
101         u32 gpio;
102         u32 gap;
103         unsigned long current_jiffies;
104
105         /* read gpio port */
106         gpio = bttv_gpio_read(&btv->c);
107
108         /* remote IRQ? */
109         if (!(gpio & 0x20))
110                 return 0;
111
112         /* get time of bit */
113         current_jiffies = jiffies;
114         do_gettimeofday(&tv);
115
116         /* avoid overflow with gap >1s */
117         if (tv.tv_sec - ir->base_time.tv_sec > 1) {
118                 gap = 200000;
119         } else {
120                 gap = 1000000 * (tv.tv_sec - ir->base_time.tv_sec) +
121                     tv.tv_usec - ir->base_time.tv_usec;
122         }
123
124         /* active code => add bit */
125         if (ir->active) {
126                 /* only if in the code (otherwise spurious IRQ or timer
127                    late) */
128                 if (ir->last_bit < 28) {
129                         ir->last_bit = (gap - ir_rc5_remote_gap / 2) /
130                             ir_rc5_remote_gap;
131                         ir->code |= 1 << ir->last_bit;
132                 }
133                 /* starting new code */
134         } else {
135                 ir->active = 1;
136                 ir->code = 0;
137                 ir->base_time = tv;
138                 ir->last_bit = 0;
139
140                 mod_timer(&ir->timer_end,
141                           current_jiffies + msecs_to_jiffies(30));
142         }
143
144         /* toggle GPIO pin 4 to reset the irq */
145         bttv_gpio_write(&btv->c, gpio & ~(1 << 4));
146         bttv_gpio_write(&btv->c, gpio | (1 << 4));
147         return 1;
148 }
149
150 /* ---------------------------------------------------------------------- */
151
152 static void bttv_ir_start(struct bttv *btv, struct card_ir *ir)
153 {
154         if (ir->polling) {
155                 setup_timer(&ir->timer, bttv_input_timer, (unsigned long)btv);
156                 ir->timer.expires  = jiffies + HZ;
157                 add_timer(&ir->timer);
158         } else if (ir->rc5_gpio) {
159                 /* set timer_end for code completion */
160                 init_timer(&ir->timer_end);
161                 ir->timer_end.function = ir_rc5_timer_end;
162                 ir->timer_end.data = (unsigned long)ir;
163
164                 init_timer(&ir->timer_keyup);
165                 ir->timer_keyup.function = ir_rc5_timer_keyup;
166                 ir->timer_keyup.data = (unsigned long)ir;
167                 ir->shift_by = 1;
168                 ir->start = 3;
169                 ir->addr = 0x0;
170                 ir->rc5_key_timeout = ir_rc5_key_timeout;
171                 ir->rc5_remote_gap = ir_rc5_remote_gap;
172         }
173 }
174
175 static void bttv_ir_stop(struct bttv *btv)
176 {
177         if (btv->remote->polling) {
178                 del_timer_sync(&btv->remote->timer);
179                 flush_scheduled_work();
180         }
181
182         if (btv->remote->rc5_gpio) {
183                 u32 gpio;
184
185                 del_timer_sync(&btv->remote->timer_end);
186                 flush_scheduled_work();
187
188                 gpio = bttv_gpio_read(&btv->c);
189                 bttv_gpio_write(&btv->c, gpio & ~(1 << 4));
190         }
191 }
192
193 int bttv_input_init(struct bttv *btv)
194 {
195         struct card_ir *ir;
196         IR_KEYTAB_TYPE *ir_codes = NULL;
197         struct input_dev *input_dev;
198         int ir_type = IR_TYPE_OTHER;
199         int err = -ENOMEM;
200
201         if (!btv->has_remote)
202                 return -ENODEV;
203
204         ir = kzalloc(sizeof(*ir),GFP_KERNEL);
205         input_dev = input_allocate_device();
206         if (!ir || !input_dev)
207                 goto err_out_free;
208
209         /* detect & configure */
210         switch (btv->c.type) {
211         case BTTV_BOARD_AVERMEDIA:
212         case BTTV_BOARD_AVPHONE98:
213         case BTTV_BOARD_AVERMEDIA98:
214                 ir_codes         = ir_codes_avermedia;
215                 ir->mask_keycode = 0xf88000;
216                 ir->mask_keydown = 0x010000;
217                 ir->polling      = 50; // ms
218                 break;
219
220         case BTTV_BOARD_AVDVBT_761:
221         case BTTV_BOARD_AVDVBT_771:
222                 ir_codes         = ir_codes_avermedia_dvbt;
223                 ir->mask_keycode = 0x0f00c0;
224                 ir->mask_keydown = 0x000020;
225                 ir->polling      = 50; // ms
226                 break;
227
228         case BTTV_BOARD_PXELVWPLTVPAK:
229                 ir_codes         = ir_codes_pixelview;
230                 ir->mask_keycode = 0x003e00;
231                 ir->mask_keyup   = 0x010000;
232                 ir->polling      = 50; // ms
233                 break;
234         case BTTV_BOARD_PV_M4900:
235         case BTTV_BOARD_PV_BT878P_9B:
236         case BTTV_BOARD_PV_BT878P_PLUS:
237                 ir_codes         = ir_codes_pixelview;
238                 ir->mask_keycode = 0x001f00;
239                 ir->mask_keyup   = 0x008000;
240                 ir->polling      = 50; // ms
241                 break;
242
243         case BTTV_BOARD_WINFAST2000:
244                 ir_codes         = ir_codes_winfast;
245                 ir->mask_keycode = 0x1f8;
246                 break;
247         case BTTV_BOARD_MAGICTVIEW061:
248         case BTTV_BOARD_MAGICTVIEW063:
249                 ir_codes         = ir_codes_winfast;
250                 ir->mask_keycode = 0x0008e000;
251                 ir->mask_keydown = 0x00200000;
252                 break;
253         case BTTV_BOARD_APAC_VIEWCOMP:
254                 ir_codes         = ir_codes_apac_viewcomp;
255                 ir->mask_keycode = 0x001f00;
256                 ir->mask_keyup   = 0x008000;
257                 ir->polling      = 50; // ms
258                 break;
259         case BTTV_BOARD_CONCEPTRONIC_CTVFMI2:
260         case BTTV_BOARD_CONTVFMI:
261                 ir_codes         = ir_codes_pixelview;
262                 ir->mask_keycode = 0x001F00;
263                 ir->mask_keyup   = 0x006000;
264                 ir->polling      = 50; // ms
265                 break;
266         case BTTV_BOARD_NEBULA_DIGITV:
267                 ir_codes = ir_codes_nebula;
268                 btv->custom_irq = bttv_rc5_irq;
269                 ir->rc5_gpio = 1;
270                 break;
271         case BTTV_BOARD_MACHTV_MAGICTV:
272                 ir_codes         = ir_codes_apac_viewcomp;
273                 ir->mask_keycode = 0x001F00;
274                 ir->mask_keyup   = 0x004000;
275                 ir->polling      = 50; /* ms */
276                 break;
277         }
278         if (NULL == ir_codes) {
279                 dprintk(KERN_INFO "Ooops: IR config error [card=%d]\n", btv->c.type);
280                 err = -ENODEV;
281                 goto err_out_free;
282         }
283
284         if (ir->rc5_gpio) {
285                 u32 gpio;
286                 /* enable remote irq */
287                 bttv_gpio_inout(&btv->c, (1 << 4), 1 << 4);
288                 gpio = bttv_gpio_read(&btv->c);
289                 bttv_gpio_write(&btv->c, gpio & ~(1 << 4));
290                 bttv_gpio_write(&btv->c, gpio | (1 << 4));
291         } else {
292                 /* init hardware-specific stuff */
293                 bttv_gpio_inout(&btv->c, ir->mask_keycode | ir->mask_keydown, 0);
294         }
295
296         /* init input device */
297         ir->dev = input_dev;
298
299         snprintf(ir->name, sizeof(ir->name), "bttv IR (card=%d)",
300                  btv->c.type);
301         snprintf(ir->phys, sizeof(ir->phys), "pci-%s/ir0",
302                  pci_name(btv->c.pci));
303
304         ir_input_init(input_dev, &ir->ir, ir_type, ir_codes);
305         input_dev->name = ir->name;
306         input_dev->phys = ir->phys;
307         input_dev->id.bustype = BUS_PCI;
308         input_dev->id.version = 1;
309         if (btv->c.pci->subsystem_vendor) {
310                 input_dev->id.vendor  = btv->c.pci->subsystem_vendor;
311                 input_dev->id.product = btv->c.pci->subsystem_device;
312         } else {
313                 input_dev->id.vendor  = btv->c.pci->vendor;
314                 input_dev->id.product = btv->c.pci->device;
315         }
316         input_dev->cdev.dev = &btv->c.pci->dev;
317
318         btv->remote = ir;
319         bttv_ir_start(btv, ir);
320
321         /* all done */
322         err = input_register_device(btv->remote->dev);
323         if (err)
324                 goto err_out_stop;
325
326         /* the remote isn't as bouncy as a keyboard */
327         ir->dev->rep[REP_DELAY] = repeat_delay;
328         ir->dev->rep[REP_PERIOD] = repeat_period;
329
330         return 0;
331
332  err_out_stop:
333         bttv_ir_stop(btv);
334         btv->remote = NULL;
335  err_out_free:
336         input_free_device(input_dev);
337         kfree(ir);
338         return err;
339 }
340
341 void bttv_input_fini(struct bttv *btv)
342 {
343         if (btv->remote == NULL)
344                 return;
345
346         bttv_ir_stop(btv);
347         input_unregister_device(btv->remote->dev);
348         kfree(btv->remote);
349         btv->remote = NULL;
350 }
351
352
353 /*
354  * Local variables:
355  * c-basic-offset: 8
356  * End:
357  */