ASoC: AMD: add AMD ASoC ACP 2.x DMA driver

ACP IP has internal DMA controller with multiple channels which
can be programmed in cyclic/non cyclic manner. ACP can generate
interrupt upon completion of DMA transfer, if required.
The PCM driver provides the platform DMA component to ALSA core.
Signed-off-by: Maruthi Bayyavarapu <maruthi.bayyavarapu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Murali Krishna Vemuri <murali-krishna.vemuri@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/Kconfig

@@ -38,6 +38,7 @@ config SND_SOC_TOPOLOGY
 
 # All the supported SoCs
 source "sound/soc/adi/Kconfig"
+source "sound/soc/amd/Kconfig"
 source "sound/soc/atmel/Kconfig"
 source "sound/soc/au1x/Kconfig"
 source "sound/soc/bcm/Kconfig"

sound/soc/Makefile

@@ -18,6 +18,7 @@ obj-$(CONFIG_SND_SOC)	+= snd-soc-core.o
 obj-$(CONFIG_SND_SOC)	+= codecs/
 obj-$(CONFIG_SND_SOC)	+= generic/
 obj-$(CONFIG_SND_SOC)	+= adi/
+obj-$(CONFIG_SND_SOC)	+= amd/
 obj-$(CONFIG_SND_SOC)	+= atmel/
 obj-$(CONFIG_SND_SOC)	+= au1x/
 obj-$(CONFIG_SND_SOC)	+= bcm/

sound/soc/amd/Kconfig

+config SND_SOC_AMD_ACP
+	tristate "AMD Audio Coprocessor support"
+	help
+	 This option enables ACP DMA support on AMD platform.

sound/soc/amd/Makefile

+snd-soc-acp-pcm-objs	:= acp-pcm-dma.o
+
+obj-$(CONFIG_SND_SOC_AMD_ACP) += snd-soc-acp-pcm.o

sound/soc/amd/acp.h

+#ifndef __ACP_HW_H
+#define __ACP_HW_H
+
+#include "include/acp_2_2_d.h"
+#include "include/acp_2_2_sh_mask.h"
+
+#define ACP_PAGE_SIZE_4K_ENABLE			0x02
+
+#define ACP_PLAYBACK_PTE_OFFSET			10
+#define ACP_CAPTURE_PTE_OFFSET			0
+
+#define ACP_GARLIC_CNTL_DEFAULT			0x00000FB4
+#define ACP_ONION_CNTL_DEFAULT			0x00000FB4
+
+#define ACP_PHYSICAL_BASE			0x14000
+
+/* Playback SRAM address (as a destination in dma descriptor) */
+#define ACP_SHARED_RAM_BANK_1_ADDRESS		0x4002000
+
+/* Capture SRAM address (as a source in dma descriptor) */
+#define ACP_SHARED_RAM_BANK_5_ADDRESS		0x400A000
+
+#define ACP_DMA_RESET_TIME			10000
+#define ACP_CLOCK_EN_TIME_OUT_VALUE		0x000000FF
+#define ACP_SOFT_RESET_DONE_TIME_OUT_VALUE	0x000000FF
+#define ACP_DMA_COMPLETE_TIME_OUT_VALUE		0x000000FF
+
+#define ACP_SRAM_BASE_ADDRESS			0x4000000
+#define ACP_DAGB_GRP_SRAM_BASE_ADDRESS		0x4001000
+#define ACP_DAGB_GRP_SRBM_SRAM_BASE_OFFSET	0x1000
+#define ACP_INTERNAL_APERTURE_WINDOW_0_ADDRESS	0x00000000
+#define ACP_INTERNAL_APERTURE_WINDOW_4_ADDRESS	0x01800000
+
+#define TO_ACP_I2S_1   0x2
+#define TO_ACP_I2S_2   0x4
+#define FROM_ACP_I2S_1 0xa
+#define FROM_ACP_I2S_2 0xb
+
+#define ACP_TILE_ON_MASK                0x03
+#define ACP_TILE_OFF_MASK               0x02
+#define ACP_TILE_ON_RETAIN_REG_MASK     0x1f
+#define ACP_TILE_OFF_RETAIN_REG_MASK    0x20
+
+#define ACP_TILE_P1_MASK                0x3e
+#define ACP_TILE_P2_MASK                0x3d
+#define ACP_TILE_DSP0_MASK              0x3b
+#define ACP_TILE_DSP1_MASK              0x37
+
+#define ACP_TILE_DSP2_MASK              0x2f
+/* Playback DMA channels */
+#define SYSRAM_TO_ACP_CH_NUM 12
+#define ACP_TO_I2S_DMA_CH_NUM 13
+
+/* Capture DMA channels */
+#define ACP_TO_SYSRAM_CH_NUM 14
+#define I2S_TO_ACP_DMA_CH_NUM 15
+
+#define NUM_DSCRS_PER_CHANNEL 2
+
+#define PLAYBACK_START_DMA_DESCR_CH12 0
+#define PLAYBACK_END_DMA_DESCR_CH12 1
+#define PLAYBACK_START_DMA_DESCR_CH13 2
+#define PLAYBACK_END_DMA_DESCR_CH13 3
+
+#define CAPTURE_START_DMA_DESCR_CH14 4
+#define CAPTURE_END_DMA_DESCR_CH14 5
+#define CAPTURE_START_DMA_DESCR_CH15 6
+#define CAPTURE_END_DMA_DESCR_CH15 7
+
+enum acp_dma_priority_level {
+	/* 0x0 Specifies the DMA channel is given normal priority */
+	ACP_DMA_PRIORITY_LEVEL_NORMAL = 0x0,
+	/* 0x1 Specifies the DMA channel is given high priority */
+	ACP_DMA_PRIORITY_LEVEL_HIGH = 0x1,
+	ACP_DMA_PRIORITY_LEVEL_FORCESIZE = 0xFF
+};
+
+struct audio_substream_data {
+	struct page *pg;
+	unsigned int order;
+	u16 num_of_pages;
+	u16 direction;
+	uint64_t size;
+	void __iomem *acp_mmio;
+};
+
+enum {
+	ACP_TILE_P1 = 0,
+	ACP_TILE_P2,
+	ACP_TILE_DSP0,
+	ACP_TILE_DSP1,
+	ACP_TILE_DSP2,
+};
+
+enum {
+	ACP_DMA_ATTRIBUTES_SHAREDMEM_TO_DAGB_ONION = 0x0,
+	ACP_DMA_ATTRIBUTES_SHARED_MEM_TO_DAGB_GARLIC = 0x1,
+	ACP_DMA_ATTRIBUTES_DAGB_ONION_TO_SHAREDMEM = 0x8,
+	ACP_DMA_ATTRIBUTES_DAGB_GARLIC_TO_SHAREDMEM = 0x9,
+	ACP_DMA_ATTRIBUTES_FORCE_SIZE = 0xF
+};
+
+typedef struct acp_dma_dscr_transfer {
+	/* Specifies the source memory location for the DMA data transfer. */
+	u32 src;
+	/* Specifies the destination memory location to where the data will
+	 * be transferred.
+	*/
+	u32 dest;
+	/* Specifies the number of bytes need to be transferred
+	* from source to destination memory.Transfer direction & IOC enable
+	*/
+	u32 xfer_val;
+	/* Reserved for future use */
+	u32 reserved;
+} acp_dma_dscr_transfer_t;
+
+#endif /*__ACP_HW_H */