platform: mtk: Add AFE buffer address translation

Add AFE buffer address translation between CPU and ADSP for MT818X and MT8195 platforms. AFE buffer is allocated in heap located in ADSP SRAM. SRAM base address is not the same for CPU and ADSP address space. AFE hardware accept buffer base address in CPU address space only.

Signed-off-by: Andrew Perepech <andrew.perepech@mediatek.com>

Author: andrew-mtk

src/platform/mtk/dai.c

@@ -12,16 +12,25 @@
  */
 #if defined(CONFIG_SOC_MT8186)
 #define MTK_AFE_BASE 0x11210000
+#define SRAM_CPU_START 0x10800000
 #elif defined(CONFIG_SOC_SERIES_MT818X)
 #define MTK_AFE_BASE 0x10b10000
+#define SRAM_CPU_START 0x10d00000
 #elif defined(CONFIG_SOC_MT8195)
 #define MTK_AFE_BASE 0x10890000
+#define SRAM_CPU_START 0x10840000
 #elif defined(CONFIG_SOC_MT8196)
 #define MTK_AFE_BASE 0x1a110000
+#define SRAM_CPU_START 0x1a210000
 #else
 #error Unrecognized device
 #endif
 
+#define SRAM_ADSP_START	DT_REG_ADDR(DT_NODELABEL(sram0))
+#define SRAM_SIZE		DT_REG_SIZE(DT_NODELABEL(sram0))
+#define SRAM_ADSP_END	(SRAM_ADSP_START + SRAM_SIZE)
+#define SRAM_CPU_END	(SRAM_CPU_START + SRAM_SIZE)
+
 /* Bitfield register: address, left shift amount, and number of bits */
 struct afe_bitfld {
 	uint32_t reg;
@@ -199,6 +208,28 @@ static const struct dai_info mtk_dai_info = {
 	.num_dai_types = ARRAY_SIZE(mtk_dai_types),
 };
 
+#if defined(CONFIG_SOC_SERIES_MT818X) || defined(CONFIG_SOC_MT8195)
+static unsigned int mtk_afe2adsp_addr(unsigned int addr)
+{
+	/* CPU -> ADSP address remap */
+	if ((addr >=  SRAM_CPU_START) && (addr <  SRAM_CPU_END)) {
+		addr = SRAM_ADSP_START + (addr -  SRAM_CPU_START);
+	}
+
+	return addr;
+}
+
+static unsigned int mtk_adsp2afe_addr(unsigned int addr)
+{
+	/* ADSP -> CPU address remap */
+	if ((addr >=  SRAM_ADSP_START) && (addr <  SRAM_ADSP_END)) {
+		addr = SRAM_CPU_START + (addr -  SRAM_ADSP_START);
+	}
+
+	return addr;
+}
+#endif
+
 /* Static table of fs register values.  TODO: binary search */
 static unsigned int mtk_afe_fs_timing(unsigned int rate)
 {
@@ -279,6 +310,10 @@ struct mtk_base_afe_platform mtk_afe_platform = {
 	.dais_size = ARRAY_SIZE(mtk_dais),
 	.afe_fs = mtk_afe_fs,
 	.irq_fs = mtk_afe_fs_timing,
+#if defined(CONFIG_SOC_SERIES_MT818X) || defined(CONFIG_SOC_MT8195)
+	.afe2adsp_addr = mtk_afe2adsp_addr,
+	.adsp2afe_addr = mtk_adsp2afe_addr,
+#endif
 };
 
 int mtk_dai_init(struct sof *sof)