V4L/DVB (4961): Add support for the ASUS P7131 remote control

Besides adding the board specific code, this patch moves
the RC5 decoding code from bt8xx to ir-functions.c to make it available 
for all drivers.

Signed-off-by: Marc Fargas <telenieko.telenieko.com>
Signed-off-by: Hermann Pitton <hermann-pitton@arcor.de>
Signed-off-by: Hartmut Hackmann <hartmut.hackmann@t-online.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

2 files changed, 164 insertions, 0 deletions

diff --git a/drivers/media/common/ir-functions.c b/drivers/media/common/ir-functions.c
index 9a8dd8764c99..cbf7c0564889 100644
--- a/drivers/media/common/ir-functions.c
+++ b/drivers/media/common/ir-functions.c
@@ -256,6 +256,112 @@ int ir_decode_biphase(u32 *samples, int count, int low, int high)
         return value;
 }
 
+/* RC5 decoding stuff, moved from bttv-input.c to share it with
+ * saa7134 */
+
+/* decode raw bit pattern to RC5 code */
+u32 ir_rc5_decode(unsigned int code)
+{
+        unsigned int org_code = code;
+        unsigned int pair;
+        unsigned int rc5 = 0;
+        int i;
+
+        for (i = 0; i < 14; ++i) {
+                pair = code & 0x3;
+                code >>= 2;
+
+                rc5 <<= 1;
+                switch (pair) {
+                case 0:
+                case 2:
+                        break;
+                case 1:
+                        rc5 |= 1;
+                        break;
+                case 3:
+                        dprintk(1, "ir-common: ir_rc5_decode(%x) bad code\n", org_code);
+                        return 0;
+                }
+        }
+        dprintk(1, "ir-common: code=%x, rc5=%x, start=%x, toggle=%x, address=%x, "
+                "instr=%x\n", rc5, org_code, RC5_START(rc5),
+                RC5_TOGGLE(rc5), RC5_ADDR(rc5), RC5_INSTR(rc5));
+        return rc5;
+}
+
+void ir_rc5_timer_end(unsigned long data)
+{
+        struct card_ir *ir = (struct card_ir *)data;
+        struct timeval tv;
+        unsigned long current_jiffies, timeout;
+        u32 gap;
+        u32 rc5 = 0;
+
+        /* get time */
+        current_jiffies = jiffies;
+        do_gettimeofday(&tv);
+
+        /* avoid overflow with gap >1s */
+        if (tv.tv_sec - ir->base_time.tv_sec > 1) {
+                gap = 200000;
+        } else {
+                gap = 1000000 * (tv.tv_sec - ir->base_time.tv_sec) +
+                    tv.tv_usec - ir->base_time.tv_usec;
+        }
+
+        /* Allow some timmer jitter (RC5 is ~24ms anyway so this is ok) */
+        if (gap < 28000) {
+                dprintk(1, "ir-common: spurious timer_end\n");
+                return;
+        }
+
+        ir->active = 0;
+        if (ir->last_bit < 20) {
+                /* ignore spurious codes (caused by light/other remotes) */
+                dprintk(1, "ir-common: short code: %x\n", ir->code);
+        } else {
+                ir->code = (ir->code << ir->shift_by) | 1;
+                rc5 = ir_rc5_decode(ir->code);
+
+                /* two start bits? */
+                if (RC5_START(rc5) != ir->start) {
+                        dprintk(1, "ir-common: rc5 start bits invalid: %u\n", RC5_START(rc5));
+
+                        /* right address? */
+                } else if (RC5_ADDR(rc5) == ir->addr) {
+                        u32 toggle = RC5_TOGGLE(rc5);
+                        u32 instr = RC5_INSTR(rc5);
+
+                        /* Good code, decide if repeat/repress */
+                        if (toggle != RC5_TOGGLE(ir->last_rc5) ||
+                            instr != RC5_INSTR(ir->last_rc5)) {
+                                dprintk(1, "ir-common: instruction %x, toggle %x\n", instr,
+                                        toggle);
+                                ir_input_nokey(ir->dev, &ir->ir);
+                                ir_input_keydown(ir->dev, &ir->ir, instr,
+                                                 instr);
+                        }
+
+                        /* Set/reset key-up timer */
+                        timeout = current_jiffies + (500 + ir->rc5_key_timeout
+                                                     * HZ) / 1000;
+                        mod_timer(&ir->timer_keyup, timeout);
+
+                        /* Save code for repeat test */
+                        ir->last_rc5 = rc5;
+                }
+        }
+}
+
+void ir_rc5_timer_keyup(unsigned long data)
+{
+        struct card_ir *ir = (struct card_ir *)data;
+
+        dprintk(1, "ir-common: key released\n");
+        ir_input_nokey(ir->dev, &ir->ir);
+}
+
 EXPORT_SYMBOL_GPL(ir_input_init);
 EXPORT_SYMBOL_GPL(ir_input_nokey);
 EXPORT_SYMBOL_GPL(ir_input_keydown);
@@ -265,6 +371,10 @@ EXPORT_SYMBOL_GPL(ir_dump_samples);
 EXPORT_SYMBOL_GPL(ir_decode_biphase);
 EXPORT_SYMBOL_GPL(ir_decode_pulsedistance);
 
+EXPORT_SYMBOL_GPL(ir_rc5_decode);
+EXPORT_SYMBOL_GPL(ir_rc5_timer_end);
+EXPORT_SYMBOL_GPL(ir_rc5_timer_keyup);
+
 /*
  * Local variables:
  * c-basic-offset: 8
diff --git a/drivers/media/common/ir-keymaps.c b/drivers/media/common/ir-keymaps.c
index 0e948a5c5a03..4a54a559d81c 100644
--- a/drivers/media/common/ir-keymaps.c
+++ b/drivers/media/common/ir-keymaps.c
@@ -1606,3 +1606,57 @@ IR_KEYTAB_TYPE ir_codes_budget_ci_old[IR_KEYTAB_SIZE] = {
 };
 
 EXPORT_SYMBOL_GPL(ir_codes_budget_ci_old);
+
+/*
+ * Marc Fargas <telenieko@telenieko.com>
+ * this is the remote control that comes with the asus p7131
+ * which has a label saying is "Model PC-39"
+ */
+IR_KEYTAB_TYPE ir_codes_asus_pc39[IR_KEYTAB_SIZE] = {
+        /* Keys 0 to 9 */
+        [ 0x15 ] = KEY_0,
+        [ 0x29 ] = KEY_1,
+        [ 0x2d ] = KEY_2,
+        [ 0x2b ] = KEY_3,
+        [ 0x09 ] = KEY_4,
+        [ 0x0d ] = KEY_5,
+        [ 0x0b ] = KEY_6,
+        [ 0x31 ] = KEY_7,
+        [ 0x35 ] = KEY_8,
+        [ 0x33 ] = KEY_9,
+
+        [ 0x3e ] = KEY_RADIO,           /* radio */
+        [ 0x03 ] = KEY_MENU,            /* dvd/menu */
+        [ 0x2a ] = KEY_VOLUMEUP,
+        [ 0x19 ] = KEY_VOLUMEDOWN,
+        [ 0x37 ] = KEY_UP,
+        [ 0x3b ] = KEY_DOWN,
+        [ 0x27 ] = KEY_LEFT,
+        [ 0x2f ] = KEY_RIGHT,
+        [ 0x25 ] = KEY_VIDEO,           /* video */
+        [ 0x39 ] = KEY_AUDIO,           /* music */
+
+        [ 0x21 ] = KEY_TV,              /* tv */
+        [ 0x1d ] = KEY_EXIT,            /* back */
+        [ 0x0a ] = KEY_CHANNELUP,       /* channel / program + */
+        [ 0x1b ] = KEY_CHANNELDOWN,     /* channel / program - */
+        [ 0x1a ] = KEY_ENTER,           /* enter */
+
+        [ 0x06 ] = KEY_PAUSE,           /* play/pause */
+        [ 0x1e ] = KEY_PREVIOUS,        /* rew */
+        [ 0x26 ] = KEY_NEXT,            /* forward */
+        [ 0x0e ] = KEY_REWIND,          /* backward << */
+        [ 0x3a ] = KEY_FASTFORWARD,     /* forward >> */
+        [ 0x36 ] = KEY_STOP,
+        [ 0x2e ] = KEY_RECORD,          /* recording */
+        [ 0x16 ] = KEY_POWER,           /* the button that reads "close" */
+
+        [ 0x11 ] = KEY_ZOOM,            /* full screen */
+        [ 0x13 ] = KEY_MACRO,           /* recall */
+        [ 0x23 ] = KEY_HOME,            /* home */
+        [ 0x05 ] = KEY_PVR,             /* picture */
+        [ 0x3d ] = KEY_MUTE,            /* mute */
+        [ 0x01 ] = KEY_DVD,             /* dvd */
+};
+
+EXPORT_SYMBOL_GPL(ir_codes_asus_pc39);