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path: root/drivers/media/rc/img-ir/img-ir-sanyo.c
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Diffstat (limited to 'drivers/media/rc/img-ir/img-ir-sanyo.c')
-rw-r--r--drivers/media/rc/img-ir/img-ir-sanyo.c122
1 files changed, 122 insertions, 0 deletions
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,
+};