3 * Copyright (c) 2003 Gerd Knorr
4 * Copyright (c) 2003 Pavel Machek
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.
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.
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
21 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
23 #include <linux/module.h>
24 #include <linux/init.h>
25 #include <linux/delay.h>
26 #include <linux/interrupt.h>
27 #include <linux/input.h>
28 #include <linux/slab.h>
35 module_param(ir_debug, int, 0644);
37 static int ir_rc5_remote_gap = 885;
38 module_param(ir_rc5_remote_gap, int, 0644);
41 #define dprintk(fmt, ...) \
44 pr_info(fmt, ##__VA_ARGS__); \
47 #define DEVNAME "bttv-input"
49 #define MODULE_NAME "bttv"
51 /* ---------------------------------------------------------------------- */
53 static void ir_handle_key(struct bttv *btv)
55 struct bttv_ir *ir = btv->remote;
59 gpio = bttv_gpio_read(&btv->c);
61 if (ir->last_gpio == gpio)
67 data = ir_extract_bits(gpio, ir->mask_keycode);
68 dprintk("irq gpio=0x%x code=%d | %s%s%s\n",
70 ir->polling ? "poll" : "irq",
71 (gpio & ir->mask_keydown) ? " down" : "",
72 (gpio & ir->mask_keyup) ? " up" : "");
74 if ((ir->mask_keydown && (gpio & ir->mask_keydown)) ||
75 (ir->mask_keyup && !(gpio & ir->mask_keyup))) {
76 rc_keydown_notimeout(ir->dev, RC_TYPE_UNKNOWN, data, 0);
78 /* HACK: Probably, ir->mask_keydown is missing
80 if (btv->c.type == BTTV_BOARD_WINFAST2000)
81 rc_keydown_notimeout(ir->dev, RC_TYPE_UNKNOWN, data, 0);
87 static void ir_enltv_handle_key(struct bttv *btv)
89 struct bttv_ir *ir = btv->remote;
90 u32 gpio, data, keyup;
93 gpio = bttv_gpio_read(&btv->c);
96 data = ir_extract_bits(gpio, ir->mask_keycode);
98 /* Check if it is keyup */
99 keyup = (gpio & ir->mask_keyup) ? 1 << 31 : 0;
101 if ((ir->last_gpio & 0x7f) != data) {
102 dprintk("gpio=0x%x code=%d | %s\n",
104 (gpio & ir->mask_keyup) ? " up" : "up/down");
106 rc_keydown_notimeout(ir->dev, RC_TYPE_UNKNOWN, data, 0);
110 if ((ir->last_gpio & 1 << 31) == keyup)
113 dprintk("(cnt) gpio=0x%x code=%d | %s\n",
115 (gpio & ir->mask_keyup) ? " up" : "down");
120 rc_keydown_notimeout(ir->dev, RC_TYPE_UNKNOWN, data, 0);
123 ir->last_gpio = data | keyup;
126 static int bttv_rc5_irq(struct bttv *btv);
128 void bttv_input_irq(struct bttv *btv)
130 struct bttv_ir *ir = btv->remote;
134 else if (!ir->polling)
138 static void bttv_input_timer(unsigned long data)
140 struct bttv *btv = (struct bttv*)data;
141 struct bttv_ir *ir = btv->remote;
143 if (btv->c.type == BTTV_BOARD_ENLTV_FM_2)
144 ir_enltv_handle_key(btv);
147 mod_timer(&ir->timer, jiffies + msecs_to_jiffies(ir->polling));
151 * FIXME: Nebula digi uses the legacy way to decode RC5, instead of relying
152 * on the rc-core way. As we need to be sure that both IRQ transitions are
153 * properly triggered, Better to touch it only with this hardware for
157 #define RC5_START(x) (((x) >> 12) & 0x03)
158 #define RC5_TOGGLE(x) (((x) >> 11) & 0x01)
159 #define RC5_ADDR(x) (((x) >> 6) & 0x1f)
160 #define RC5_INSTR(x) (((x) >> 0) & 0x3f)
162 /* decode raw bit pattern to RC5 code */
163 static u32 bttv_rc5_decode(unsigned int code)
165 unsigned int org_code = code;
167 unsigned int rc5 = 0;
170 for (i = 0; i < 14; ++i) {
183 dprintk("rc5_decode(%x) bad code\n",
188 dprintk("code=%x, rc5=%x, start=%x, toggle=%x, address=%x, "
189 "instr=%x\n", rc5, org_code, RC5_START(rc5),
190 RC5_TOGGLE(rc5), RC5_ADDR(rc5), RC5_INSTR(rc5));
194 static void bttv_rc5_timer_end(unsigned long data)
196 struct bttv_ir *ir = (struct bttv_ir *)data;
198 u32 gap, rc5, scancode;
199 u8 toggle, command, system;
204 gap = ktime_to_us(ktime_sub(tv, ir->base_time));
205 /* avoid overflow with gap >1s */
206 if (gap > USEC_PER_SEC) {
209 /* signal we're ready to start a new code */
212 /* Allow some timer jitter (RC5 is ~24ms anyway so this is ok) */
214 dprintk("spurious timer_end\n");
218 if (ir->last_bit < 20) {
219 /* ignore spurious codes (caused by light/other remotes) */
220 dprintk("short code: %x\n", ir->code);
224 ir->code = (ir->code << ir->shift_by) | 1;
225 rc5 = bttv_rc5_decode(ir->code);
227 toggle = RC5_TOGGLE(rc5);
228 system = RC5_ADDR(rc5);
229 command = RC5_INSTR(rc5);
231 switch (RC5_START(rc5)) {
241 scancode = RC_SCANCODE_RC5(system, command);
242 rc_keydown(ir->dev, RC_TYPE_RC5, scancode, toggle);
243 dprintk("scancode %x, toggle %x\n", scancode, toggle);
246 static int bttv_rc5_irq(struct bttv *btv)
248 struct bttv_ir *ir = btv->remote;
252 unsigned long current_jiffies;
255 gpio = bttv_gpio_read(&btv->c);
257 /* get time of bit */
258 current_jiffies = jiffies;
261 gap = ktime_to_us(ktime_sub(tv, ir->base_time));
262 /* avoid overflow with gap >1s */
263 if (gap > USEC_PER_SEC) {
267 dprintk("RC5 IRQ: gap %d us for %s\n",
268 gap, (gpio & 0x20) ? "mark" : "space");
274 /* active code => add bit */
276 /* only if in the code (otherwise spurious IRQ or timer
278 if (ir->last_bit < 28) {
279 ir->last_bit = (gap - ir_rc5_remote_gap / 2) /
281 ir->code |= 1 << ir->last_bit;
283 /* starting new code */
290 mod_timer(&ir->timer, current_jiffies + msecs_to_jiffies(30));
293 /* toggle GPIO pin 4 to reset the irq */
294 bttv_gpio_write(&btv->c, gpio & ~(1 << 4));
295 bttv_gpio_write(&btv->c, gpio | (1 << 4));
299 /* ---------------------------------------------------------------------- */
301 static void bttv_ir_start(struct bttv *btv, struct bttv_ir *ir)
304 setup_timer(&ir->timer, bttv_input_timer, (unsigned long)btv);
305 ir->timer.expires = jiffies + msecs_to_jiffies(1000);
306 add_timer(&ir->timer);
307 } else if (ir->rc5_gpio) {
308 /* set timer_end for code completion */
309 setup_timer(&ir->timer, bttv_rc5_timer_end, (unsigned long)ir);
311 ir->rc5_remote_gap = ir_rc5_remote_gap;
315 static void bttv_ir_stop(struct bttv *btv)
317 if (btv->remote->polling)
318 del_timer_sync(&btv->remote->timer);
320 if (btv->remote->rc5_gpio) {
323 del_timer_sync(&btv->remote->timer);
325 gpio = bttv_gpio_read(&btv->c);
326 bttv_gpio_write(&btv->c, gpio & ~(1 << 4));
331 * Get_key functions used by I2C remotes
334 static int get_key_pv951(struct IR_i2c *ir, enum rc_type *protocol,
335 u32 *scancode, u8 *toggle)
340 if (1 != i2c_master_recv(ir->c, &b, 1)) {
341 dprintk("read error\n");
348 dprintk("key %02x\n", b);
352 * lirc_i2c maps the pv951 code as:
354 * cmd = bit_reverse (b)
355 * So, it seems that this device uses NEC extended
356 * I decided to not fix the table, due to two reasons:
357 * 1) Without the actual device, this is only a guess;
358 * 2) As the addr is not reported via I2C, nor can be changed,
359 * the device is bound to the vendor-provided RC.
362 *protocol = RC_TYPE_UNKNOWN;
368 /* Instantiate the I2C IR receiver device, if present */
369 void init_bttv_i2c_ir(struct bttv *btv)
371 const unsigned short addr_list[] = {
372 0x1a, 0x18, 0x64, 0x30, 0x71,
375 struct i2c_board_info info;
376 struct i2c_client *i2c_dev;
378 if (0 != btv->i2c_rc)
381 memset(&info, 0, sizeof(struct i2c_board_info));
382 memset(&btv->init_data, 0, sizeof(btv->init_data));
383 strlcpy(info.type, "ir_video", I2C_NAME_SIZE);
385 switch (btv->c.type) {
386 case BTTV_BOARD_PV951:
387 btv->init_data.name = "PV951";
388 btv->init_data.get_key = get_key_pv951;
389 btv->init_data.ir_codes = RC_MAP_PV951;
394 if (btv->init_data.name) {
395 info.platform_data = &btv->init_data;
396 i2c_dev = i2c_new_device(&btv->c.i2c_adap, &info);
399 * The external IR receiver is at i2c address 0x34 (0x35 for
400 * reads). Future Hauppauge cards will have an internal
401 * receiver at 0x30 (0x31 for reads). In theory, both can be
402 * fitted, and Hauppauge suggest an external overrides an
404 * That's why we probe 0x1a (~0x34) first. CB
406 i2c_dev = i2c_new_probed_device(&btv->c.i2c_adap, &info, addr_list, NULL);
411 #if defined(CONFIG_MODULES) && defined(MODULE)
412 request_module("ir-kbd-i2c");
416 int bttv_input_init(struct bttv *btv)
419 char *ir_codes = NULL;
423 if (!btv->has_remote)
426 ir = kzalloc(sizeof(*ir),GFP_KERNEL);
427 rc = rc_allocate_device();
431 /* detect & configure */
432 switch (btv->c.type) {
433 case BTTV_BOARD_AVERMEDIA:
434 case BTTV_BOARD_AVPHONE98:
435 case BTTV_BOARD_AVERMEDIA98:
436 ir_codes = RC_MAP_AVERMEDIA;
437 ir->mask_keycode = 0xf88000;
438 ir->mask_keydown = 0x010000;
439 ir->polling = 50; // ms
442 case BTTV_BOARD_AVDVBT_761:
443 case BTTV_BOARD_AVDVBT_771:
444 ir_codes = RC_MAP_AVERMEDIA_DVBT;
445 ir->mask_keycode = 0x0f00c0;
446 ir->mask_keydown = 0x000020;
447 ir->polling = 50; // ms
450 case BTTV_BOARD_PXELVWPLTVPAK:
451 ir_codes = RC_MAP_PIXELVIEW;
452 ir->mask_keycode = 0x003e00;
453 ir->mask_keyup = 0x010000;
454 ir->polling = 50; // ms
456 case BTTV_BOARD_PV_M4900:
457 case BTTV_BOARD_PV_BT878P_9B:
458 case BTTV_BOARD_PV_BT878P_PLUS:
459 ir_codes = RC_MAP_PIXELVIEW;
460 ir->mask_keycode = 0x001f00;
461 ir->mask_keyup = 0x008000;
462 ir->polling = 50; // ms
465 case BTTV_BOARD_WINFAST2000:
466 ir_codes = RC_MAP_WINFAST;
467 ir->mask_keycode = 0x1f8;
469 case BTTV_BOARD_MAGICTVIEW061:
470 case BTTV_BOARD_MAGICTVIEW063:
471 ir_codes = RC_MAP_WINFAST;
472 ir->mask_keycode = 0x0008e000;
473 ir->mask_keydown = 0x00200000;
475 case BTTV_BOARD_APAC_VIEWCOMP:
476 ir_codes = RC_MAP_APAC_VIEWCOMP;
477 ir->mask_keycode = 0x001f00;
478 ir->mask_keyup = 0x008000;
479 ir->polling = 50; // ms
481 case BTTV_BOARD_ASKEY_CPH03X:
482 case BTTV_BOARD_CONCEPTRONIC_CTVFMI2:
483 case BTTV_BOARD_CONTVFMI:
484 case BTTV_BOARD_KWORLD_VSTREAM_XPERT:
485 ir_codes = RC_MAP_PIXELVIEW;
486 ir->mask_keycode = 0x001F00;
487 ir->mask_keyup = 0x006000;
488 ir->polling = 50; // ms
490 case BTTV_BOARD_NEBULA_DIGITV:
491 ir_codes = RC_MAP_NEBULA;
494 case BTTV_BOARD_MACHTV_MAGICTV:
495 ir_codes = RC_MAP_APAC_VIEWCOMP;
496 ir->mask_keycode = 0x001F00;
497 ir->mask_keyup = 0x004000;
498 ir->polling = 50; /* ms */
500 case BTTV_BOARD_KOZUMI_KTV_01C:
501 ir_codes = RC_MAP_PCTV_SEDNA;
502 ir->mask_keycode = 0x001f00;
503 ir->mask_keyup = 0x006000;
504 ir->polling = 50; /* ms */
506 case BTTV_BOARD_ENLTV_FM_2:
507 ir_codes = RC_MAP_ENCORE_ENLTV2;
508 ir->mask_keycode = 0x00fd00;
509 ir->mask_keyup = 0x000080;
510 ir->polling = 1; /* ms */
511 ir->last_gpio = ir_extract_bits(bttv_gpio_read(&btv->c),
517 dprintk("Ooops: IR config error [card=%d]\n", btv->c.type);
524 /* enable remote irq */
525 bttv_gpio_inout(&btv->c, (1 << 4), 1 << 4);
526 gpio = bttv_gpio_read(&btv->c);
527 bttv_gpio_write(&btv->c, gpio & ~(1 << 4));
528 bttv_gpio_write(&btv->c, gpio | (1 << 4));
530 /* init hardware-specific stuff */
531 bttv_gpio_inout(&btv->c, ir->mask_keycode | ir->mask_keydown, 0);
534 /* init input device */
537 snprintf(ir->name, sizeof(ir->name), "bttv IR (card=%d)",
539 snprintf(ir->phys, sizeof(ir->phys), "pci-%s/ir0",
540 pci_name(btv->c.pci));
542 rc->input_name = ir->name;
543 rc->input_phys = ir->phys;
544 rc->input_id.bustype = BUS_PCI;
545 rc->input_id.version = 1;
546 if (btv->c.pci->subsystem_vendor) {
547 rc->input_id.vendor = btv->c.pci->subsystem_vendor;
548 rc->input_id.product = btv->c.pci->subsystem_device;
550 rc->input_id.vendor = btv->c.pci->vendor;
551 rc->input_id.product = btv->c.pci->device;
553 rc->dev.parent = &btv->c.pci->dev;
554 rc->map_name = ir_codes;
555 rc->driver_name = MODULE_NAME;
558 bttv_ir_start(btv, ir);
561 err = rc_register_device(rc);
576 void bttv_input_fini(struct bttv *btv)
578 if (btv->remote == NULL)
582 rc_unregister_device(btv->remote->dev);