[media] rc: img-ir: add Sanyo decoder module

Add an img-ir module for decoding the Sanyo infrared protocol.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

4 files changed, 134 insertions, 0 deletions

diff --git a/drivers/media/rc/img-ir/Kconfig b/drivers/media/rc/img-ir/Kconfig
index 48627f9741be..03ba9fc170fb 100644
--- a/drivers/media/rc/img-ir/Kconfig
+++ b/drivers/media/rc/img-ir/Kconfig
@@ -52,3 +52,10 @@ config IR_IMG_SHARP
         help
            Say Y here to enable support for the Sharp protocol in the ImgTec
            infrared decoder block.
+
+config IR_IMG_SANYO
+        bool "Sanyo protocol support"
+        depends on IR_IMG_HW
+        help
+           Say Y here to enable support for the Sanyo protocol (used by Sanyo,
+           Aiwa, Chinon remotes) in the ImgTec infrared decoder block.
diff --git a/drivers/media/rc/img-ir/Makefile b/drivers/media/rc/img-ir/Makefile
index 792a3c4bc38f..92a459d99509 100644
--- a/drivers/media/rc/img-ir/Makefile
+++ b/drivers/media/rc/img-ir/Makefile
@@ -5,6 +5,7 @@ img-ir-$(CONFIG_IR_IMG_NEC)	+= img-ir-nec.o
 img-ir-$(CONFIG_IR_IMG_JVC)     += img-ir-jvc.o
 img-ir-$(CONFIG_IR_IMG_SONY)    += img-ir-sony.o
 img-ir-$(CONFIG_IR_IMG_SHARP)   += img-ir-sharp.o
+img-ir-$(CONFIG_IR_IMG_SANYO)   += img-ir-sanyo.o
 img-ir-objs                     := $(img-ir-y)
 
 obj-$(CONFIG_IR_IMG)            += img-ir.o
diff --git a/drivers/media/rc/img-ir/img-ir-hw.c b/drivers/media/rc/img-ir/img-ir-hw.c
index 9931dfaeb6ad..cbbfd7df649f 100644
--- a/drivers/media/rc/img-ir/img-ir-hw.c
+++ b/drivers/media/rc/img-ir/img-ir-hw.c
@@ -24,6 +24,7 @@ extern struct img_ir_decoder img_ir_nec;
 extern struct img_ir_decoder img_ir_jvc;
 extern struct img_ir_decoder img_ir_sony;
 extern struct img_ir_decoder img_ir_sharp;
+extern struct img_ir_decoder img_ir_sanyo;
 
 static bool img_ir_decoders_preprocessed;
 static struct img_ir_decoder *img_ir_decoders[] = {
@@ -39,6 +40,9 @@ static struct img_ir_decoder *img_ir_decoders[] = {
 #ifdef CONFIG_IR_IMG_SHARP
         &img_ir_sharp,
 #endif
+#ifdef CONFIG_IR_IMG_SANYO
+        &img_ir_sanyo,
+#endif
         NULL
 };
 
diff --git a/drivers/media/rc/img-ir/img-ir-sanyo.c b/drivers/media/rc/img-ir/img-ir-sanyo.c
new file mode 100644
index 000000000000..c2c763e08a41
--- /dev/null
+++ b/drivers/media/rc/img-ir/img-ir-sanyo.c
@@ -0,0 +1,122 @@
+/*
+ * ImgTec IR Decoder setup for Sanyo protocol.
+ *
+ * Copyright 2012-2014 Imagination Technologies Ltd.
+ *
+ * From ir-sanyo-decoder.c:
+ *
+ * This protocol uses the NEC protocol timings. However, data is formatted as:
+ *      13 bits Custom Code
+ *      13 bits NOT(Custom Code)
+ *      8 bits Key data
+ *      8 bits NOT(Key data)
+ *
+ * According with LIRC, this protocol is used on Sanyo, Aiwa and Chinon
+ * Information for this protocol is available at the Sanyo LC7461 datasheet.
+ */
+
+#include "img-ir-hw.h"
+
+/* Convert Sanyo data to a scancode */
+static int img_ir_sanyo_scancode(int len, u64 raw, int *scancode, u64 protocols)
+{
+        unsigned int addr, addr_inv, data, data_inv;
+        /* a repeat code has no data */
+        if (!len)
+                return IMG_IR_REPEATCODE;
+        if (len != 42)
+                return -EINVAL;
+        addr     = (raw >>  0) & 0x1fff;
+        addr_inv = (raw >> 13) & 0x1fff;
+        data     = (raw >> 26) & 0xff;
+        data_inv = (raw >> 34) & 0xff;
+        /* Validate data */
+        if ((data_inv ^ data) != 0xff)
+                return -EINVAL;
+        /* Validate address */
+        if ((addr_inv ^ addr) != 0x1fff)
+                return -EINVAL;
+
+        /* Normal Sanyo */
+        *scancode = addr << 8 | data;
+        return IMG_IR_SCANCODE;
+}
+
+/* Convert Sanyo scancode to Sanyo data filter */
+static int img_ir_sanyo_filter(const struct rc_scancode_filter *in,
+                               struct img_ir_filter *out, u64 protocols)
+{
+        unsigned int addr, addr_inv, data, data_inv;
+        unsigned int addr_m, data_m;
+
+        data = in->data & 0xff;
+        data_m = in->mask & 0xff;
+        data_inv = data ^ 0xff;
+
+        if (in->data & 0xff700000)
+                return -EINVAL;
+
+        addr       = (in->data >> 8) & 0x1fff;
+        addr_m     = (in->mask >> 8) & 0x1fff;
+        addr_inv   = addr ^ 0x1fff;
+
+        out->data = (u64)data_inv << 34 |
+                    (u64)data     << 26 |
+                         addr_inv << 13 |
+                         addr;
+        out->mask = (u64)data_m << 34 |
+                    (u64)data_m << 26 |
+                         addr_m << 13 |
+                         addr_m;
+        return 0;
+}
+
+/* Sanyo decoder */
+struct img_ir_decoder img_ir_sanyo = {
+        .type = RC_BIT_SANYO,
+        .control = {
+                .decoden = 1,
+                .code_type = IMG_IR_CODETYPE_PULSEDIST,
+        },
+        /* main timings */
+        .unit = 562500, /* 562.5 us */
+        .timings = {
+                /* leader symbol */
+                .ldr = {
+                        .pulse = { 16   /* 9ms */ },
+                        .space = { 8    /* 4.5ms */ },
+                },
+                /* 0 symbol */
+                .s00 = {
+                        .pulse = { 1    /* 562.5 us */ },
+                        .space = { 1    /* 562.5 us */ },
+                },
+                /* 1 symbol */
+                .s01 = {
+                        .pulse = { 1    /* 562.5 us */ },
+                        .space = { 3    /* 1687.5 us */ },
+                },
+                /* free time */
+                .ft = {
+                        .minlen = 42,
+                        .maxlen = 42,
+                        .ft_min = 10,   /* 5.625 ms */
+                },
+        },
+        /* repeat codes */
+        .repeat = 108,                  /* 108 ms */
+        .rtimings = {
+                /* leader symbol */
+                .ldr = {
+                        .space = { 4    /* 2.25 ms */ },
+                },
+                /* free time */
+                .ft = {
+                        .minlen = 0,    /* repeat code has no data */
+                        .maxlen = 0,
+                },
+        },
+        /* scancode logic */
+        .scancode = img_ir_sanyo_scancode,
+        .filter = img_ir_sanyo_filter,
+};