[PATCH 10/13] ASoC: AMD: add ACP 2.x IP DMA abstraction layer
Alex Deucher
alexdeucher at gmail.com
Fri Dec 4 15:40:37 PST 2015
From: Maruthi Srinivas Bayyavarapu <Maruthi.Bayyavarapu at amd.com>
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.
Signed-off-by: Maruthi Bayyavarapu <maruthi.bayyavarapu at amd.com>
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
sound/soc/amd/acp.c | 587 ++++++++++++++++++++++++++++++++++++++++++++++++++++
sound/soc/amd/acp.h | 139 +++++++++++++
2 files changed, 726 insertions(+)
create mode 100644 sound/soc/amd/acp.c
create mode 100644 sound/soc/amd/acp.h
diff --git a/sound/soc/amd/acp.c b/sound/soc/amd/acp.c
new file mode 100644
index 0000000..0d59be4
--- /dev/null
+++ b/sound/soc/amd/acp.c
@@ -0,0 +1,587 @@
+/*
+ * AMD ACP module
+ *
+ * Copyright 2015 Advanced Micro Devices, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+*/
+
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <sound/asound.h>
+#include "acp.h"
+
+u32 acp_reg_read(void __iomem *acp_mmio, u32 reg)
+{
+ return readl(acp_mmio + (reg * 4));
+}
+
+void acp_reg_write(u32 val, void __iomem *acp_mmio, u32 reg)
+{
+ writel(val, acp_mmio + (reg * 4));
+}
+
+/* Configure a given dma channel parameters - enable/disble,
+ * number of descriptors, priority
+ */
+void config_acp_dma_channel(void __iomem *acp_mmio, u8 ch_num,
+ u16 dscr_strt_idx, u16 num_dscrs,
+ enum acp_dma_priority_level priority_level)
+{
+ u32 dma_ctrl;
+
+ /* disable the channel run field */
+ dma_ctrl = acp_reg_read(acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
+ dma_ctrl &= ~ACP_DMA_CNTL_0__DMAChRun_MASK;
+ acp_reg_write(dma_ctrl, acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
+
+ /* program a DMA channel with first descriptor to be processed. */
+ acp_reg_write((ACP_DMA_DSCR_STRT_IDX_0__DMAChDscrStrtIdx_MASK
+ & dscr_strt_idx),
+ acp_mmio, mmACP_DMA_DSCR_STRT_IDX_0 + ch_num);
+
+ /* program a DMA channel with the number of descriptors to be
+ * processed in the transfer
+ */
+ acp_reg_write(ACP_DMA_DSCR_CNT_0__DMAChDscrCnt_MASK & num_dscrs,
+ acp_mmio, mmACP_DMA_DSCR_CNT_0 + ch_num);
+
+ /* set DMA channel priority */
+ acp_reg_write(priority_level, acp_mmio, mmACP_DMA_PRIO_0 + ch_num);
+}
+
+/* Initialize the dma descriptors location in SRAM and page size */
+static void acp_dma_descr_init(void __iomem *acp_mmio)
+{
+ u32 sram_pte_offset = 0;
+
+ /* SRAM starts at 0x04000000. From that offset one page (4KB) left for
+ * filling DMA descriptors.sram_pte_offset = 0x04001000 , used for
+ * filling system RAM's physical pages.
+ * This becomes the ALSA's Ring buffer start address
+ */
+ sram_pte_offset = ACP_DAGB_GRP_SRAM_BASE_ADDRESS;
+
+ /* snoopable */
+ sram_pte_offset |= ACP_DAGB_BASE_ADDR_GRP_1__AXI2DAGBSnoopSel_MASK;
+ /* Memmory is system mmemory */
+ sram_pte_offset |= ACP_DAGB_BASE_ADDR_GRP_1__AXI2DAGBTargetMemSel_MASK;
+ /* Page Enabled */
+ sram_pte_offset |= ACP_DAGB_BASE_ADDR_GRP_1__AXI2DAGBGrpEnable_MASK;
+
+ acp_reg_write(sram_pte_offset, acp_mmio, mmACP_DAGB_BASE_ADDR_GRP_1);
+ acp_reg_write(PAGE_SIZE_4K_ENABLE, acp_mmio,
+ mmACP_DAGB_PAGE_SIZE_GRP_1);
+}
+
+/* Initialize a dma descriptor in SRAM based on descritor information passed */
+static void config_dma_descriptor_in_sram(void __iomem *acp_mmio,
+ u16 descr_idx,
+ acp_dma_dscr_transfer_t *descr_info)
+{
+ u32 sram_offset;
+
+ sram_offset = (descr_idx * sizeof(acp_dma_dscr_transfer_t));
+
+ /* program the source base address. */
+ acp_reg_write(sram_offset, acp_mmio, mmACP_SRBM_Targ_Idx_Addr);
+ acp_reg_write(descr_info->src, acp_mmio, mmACP_SRBM_Targ_Idx_Data);
+ /* program the destination base address. */
+ acp_reg_write(sram_offset + 4, acp_mmio, mmACP_SRBM_Targ_Idx_Addr);
+ acp_reg_write(descr_info->dest, acp_mmio, mmACP_SRBM_Targ_Idx_Data);
+
+ /* program the number of bytes to be transferred for this descriptor. */
+ acp_reg_write(sram_offset + 8, acp_mmio, mmACP_SRBM_Targ_Idx_Addr);
+ acp_reg_write(descr_info->xfer_val, acp_mmio, mmACP_SRBM_Targ_Idx_Data);
+}
+
+/* Initialize the DMA descriptor information for transfer between
+ * system memory <-> ACP SRAM
+ */
+static void set_acp_sysmem_dma_descriptors(void __iomem *acp_mmio,
+ u32 size, int direction,
+ u32 pte_offset)
+{
+ u16 num_descr;
+ u16 dma_dscr_idx = PLAYBACK_START_DMA_DESCR_CH12;
+ acp_dma_dscr_transfer_t dmadscr[2];
+
+ num_descr = 2;
+
+ dmadscr[0].xfer_val = 0;
+ if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
+ dma_dscr_idx = PLAYBACK_START_DMA_DESCR_CH12;
+ dmadscr[0].dest = ACP_SHARED_RAM_BANK_1_ADDRESS + (size / 2);
+ dmadscr[0].src = ACP_INTERNAL_APERTURE_WINDOW_0_ADDRESS +
+ (pte_offset * PAGE_SIZE_4K);
+ dmadscr[0].xfer_val |=
+ (ACP_DMA_ATTRIBUTES_DAGB_ONION_TO_SHAREDMEM << 16) |
+ (size / 2);
+ } else {
+ dma_dscr_idx = CAPTURE_START_DMA_DESCR_CH14;
+ dmadscr[0].src = ACP_SHARED_RAM_BANK_5_ADDRESS;
+ dmadscr[0].dest = ACP_INTERNAL_APERTURE_WINDOW_0_ADDRESS +
+ (pte_offset * PAGE_SIZE_4K);
+ dmadscr[0].xfer_val |=
+ BIT(22) |
+ (ACP_DMA_ATTRIBUTES_SHAREDMEM_TO_DAGB_ONION << 16) |
+ (size / 2);
+ }
+
+ config_dma_descriptor_in_sram(acp_mmio, dma_dscr_idx, &dmadscr[0]);
+
+ dmadscr[1].xfer_val = 0;
+ if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
+ dma_dscr_idx = PLAYBACK_END_DMA_DESCR_CH12;
+ dmadscr[1].dest = ACP_SHARED_RAM_BANK_1_ADDRESS;
+ dmadscr[1].src = ACP_INTERNAL_APERTURE_WINDOW_0_ADDRESS +
+ (pte_offset * PAGE_SIZE_4K) + (size / 2);
+ dmadscr[1].xfer_val |=
+ (ACP_DMA_ATTRIBUTES_DAGB_ONION_TO_SHAREDMEM << 16) |
+ (size / 2);
+ } else {
+ dma_dscr_idx = CAPTURE_END_DMA_DESCR_CH14;
+ dmadscr[1].dest = dmadscr[0].dest + (size / 2);
+ dmadscr[1].src = dmadscr[0].src + (size / 2);
+ dmadscr[1].xfer_val |= BIT(22) |
+ (ACP_DMA_ATTRIBUTES_SHAREDMEM_TO_DAGB_ONION << 16) |
+ (size / 2);
+ }
+
+ config_dma_descriptor_in_sram(acp_mmio, dma_dscr_idx, &dmadscr[1]);
+
+ if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
+ /* starting descriptor for this channel */
+ dma_dscr_idx = PLAYBACK_START_DMA_DESCR_CH12;
+ config_acp_dma_channel(acp_mmio, SYSRAM_TO_ACP_CH_NUM,
+ dma_dscr_idx, num_descr,
+ ACP_DMA_PRIORITY_LEVEL_NORMAL);
+ } else {
+ /* starting descriptor for this channel */
+ dma_dscr_idx = CAPTURE_START_DMA_DESCR_CH14;
+ config_acp_dma_channel(acp_mmio, ACP_TO_SYSRAM_CH_NUM,
+ dma_dscr_idx, num_descr,
+ ACP_DMA_PRIORITY_LEVEL_NORMAL);
+ }
+}
+
+/* Initialize the DMA descriptor information for transfer between
+ * ACP SRAM <-> I2S
+ */
+static void set_acp_to_i2s_dma_descriptors(void __iomem *acp_mmio,
+ u32 size, int direction)
+{
+
+ u16 num_descr;
+ u16 dma_dscr_idx = PLAYBACK_START_DMA_DESCR_CH13;
+ acp_dma_dscr_transfer_t dmadscr[2];
+
+ num_descr = 2;
+
+ dmadscr[0].xfer_val = 0;
+ if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
+ dma_dscr_idx = PLAYBACK_START_DMA_DESCR_CH13;
+ dmadscr[0].src = ACP_SHARED_RAM_BANK_1_ADDRESS;
+ /* dmadscr[0].dest is unused by hardware. Assgned to 0 to
+ * remove compiler warning
+ */
+ dmadscr[0].dest = 0;
+ dmadscr[0].xfer_val |= BIT(22) | (TO_ACP_I2S_1 << 16) |
+ (size / 2);
+ } else {
+ dma_dscr_idx = CAPTURE_START_DMA_DESCR_CH15;
+ /* dmadscr[0].src is unused by hardware. Assgned to 0 to
+ * remove compiler warning
+ */
+ dmadscr[0].src = 0;
+ dmadscr[0].dest = ACP_SHARED_RAM_BANK_5_ADDRESS;
+ dmadscr[0].xfer_val |= BIT(22) |
+ (FROM_ACP_I2S_1 << 16) | (size / 2);
+ }
+
+ config_dma_descriptor_in_sram(acp_mmio, dma_dscr_idx, &dmadscr[0]);
+
+ dmadscr[1].xfer_val = 0;
+ if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
+ dma_dscr_idx = PLAYBACK_END_DMA_DESCR_CH13;
+ dmadscr[1].src = dmadscr[0].src + (size / 2);
+ /* dmadscr[1].dest is unused by hardware. Assgned to 0 to
+ * remove compiler warning
+ */
+ dmadscr[1].dest = 0;
+ dmadscr[1].xfer_val |= BIT(22) | (TO_ACP_I2S_1 << 16) |
+ (size / 2);
+ } else {
+ dma_dscr_idx = CAPTURE_END_DMA_DESCR_CH15;
+ /* dmadscr[1].src is unused by hardware. Assgned to 0 to
+ * remove compiler warning
+ */
+ dmadscr[1].src = 0;
+ dmadscr[1].dest = dmadscr[0].dest + (size / 2);
+ dmadscr[1].xfer_val |= BIT(22) |
+ (FROM_ACP_I2S_1 << 16) | (size / 2);
+ }
+
+ config_dma_descriptor_in_sram(acp_mmio, dma_dscr_idx, &dmadscr[1]);
+
+ /* Configure the DMA channel with the above descriptore */
+ if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
+ /* starting descriptor for this channel */
+ dma_dscr_idx = PLAYBACK_START_DMA_DESCR_CH13;
+ config_acp_dma_channel(acp_mmio, ACP_TO_I2S_DMA_CH_NUM,
+ dma_dscr_idx, num_descr,
+ ACP_DMA_PRIORITY_LEVEL_NORMAL);
+ } else {
+ /* starting descriptor for this channel */
+ dma_dscr_idx = CAPTURE_START_DMA_DESCR_CH15;
+ config_acp_dma_channel(acp_mmio, I2S_TO_ACP_DMA_CH_NUM,
+ dma_dscr_idx, num_descr,
+ ACP_DMA_PRIORITY_LEVEL_NORMAL);
+ }
+
+}
+
+u16 get_dscr_idx(void __iomem *acp_mmio, int direction)
+{
+ u16 dscr_idx;
+
+ if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
+ dscr_idx = acp_reg_read(acp_mmio, mmACP_DMA_CUR_DSCR_13);
+ if (dscr_idx == PLAYBACK_START_DMA_DESCR_CH13)
+ dscr_idx = PLAYBACK_START_DMA_DESCR_CH12;
+ else
+ dscr_idx = PLAYBACK_END_DMA_DESCR_CH12;
+ } else {
+ dscr_idx = acp_reg_read(acp_mmio, mmACP_DMA_CUR_DSCR_15);
+ if (dscr_idx == CAPTURE_START_DMA_DESCR_CH15)
+ dscr_idx = CAPTURE_END_DMA_DESCR_CH14;
+ else
+ dscr_idx = CAPTURE_START_DMA_DESCR_CH14;
+ }
+
+ return dscr_idx;
+}
+
+/* Create page table entries in ACP SRAM for the allocated memory */
+static void acp_pte_config(void __iomem *acp_mmio, struct page *pg,
+ u16 num_of_pages, u32 pte_offset)
+{
+ u16 page_idx;
+ u64 addr;
+ u32 low;
+ u32 high;
+ u32 offset;
+
+ offset = ACP_DAGB_GRP_SRBM_SRAM_BASE_OFFSET + (pte_offset * 8);
+ for (page_idx = 0; page_idx < (num_of_pages); page_idx++) {
+ /* Load the low address of page int ACP SRAM through SRBM */
+ acp_reg_write((offset + (page_idx * 8)),
+ acp_mmio, mmACP_SRBM_Targ_Idx_Addr);
+ addr = page_to_phys(pg);
+
+ low = lower_32_bits(addr);
+ high = upper_32_bits(addr);
+
+ acp_reg_write(low, acp_mmio, mmACP_SRBM_Targ_Idx_Data);
+
+ /* Load the High address of page int ACP SRAM through SRBM */
+ acp_reg_write((offset + (page_idx * 8) + 4),
+ acp_mmio, mmACP_SRBM_Targ_Idx_Addr);
+
+ /* page enable in ACP */
+ high |= BIT(31);
+ acp_reg_write(high, acp_mmio, mmACP_SRBM_Targ_Idx_Data);
+
+ /* Move to next physically contiguos page */
+ pg++;
+ }
+}
+
+/* enables/disables ACP's external interrupt */
+void acp_enable_external_interrupts(void __iomem *acp_mmio,
+ int enable)
+{
+ u32 acp_ext_intr_enb;
+
+ acp_ext_intr_enb = enable ?
+ ACP_EXTERNAL_INTR_ENB__ACPExtIntrEnb_MASK : 0;
+
+ /* Write the Software External Interrupt Enable register */
+ acp_reg_write(acp_ext_intr_enb, acp_mmio, mmACP_EXTERNAL_INTR_ENB);
+}
+
+/* Clear (acknowledge) DMA 'Interrupt on Complete' (IOC) in ACP
+ * external interrupt status register
+ */
+void acp_ext_stat_clear_dmaioc(void __iomem *acp_mmio, u8 ch_num)
+{
+ u32 ext_intr_stat;
+ u32 chmask = BIT(ch_num);
+
+ ext_intr_stat = acp_reg_read(acp_mmio, mmACP_EXTERNAL_INTR_STAT);
+ if (ext_intr_stat & (chmask <<
+ ACP_EXTERNAL_INTR_STAT__DMAIOCStat__SHIFT)) {
+
+ ext_intr_stat &= (chmask <<
+ ACP_EXTERNAL_INTR_STAT__DMAIOCAck__SHIFT);
+ acp_reg_write(ext_intr_stat, acp_mmio,
+ mmACP_EXTERNAL_INTR_STAT);
+ }
+}
+
+/* Check whether ACP DMA interrupt (IOC) is generated or not */
+u32 acp_get_intr_flag(void __iomem *acp_mmio)
+{
+ u32 ext_intr_status;
+ u32 intr_gen;
+
+ ext_intr_status = acp_reg_read(acp_mmio, mmACP_EXTERNAL_INTR_STAT);
+ intr_gen = (((ext_intr_status &
+ ACP_EXTERNAL_INTR_STAT__DMAIOCStat_MASK) >>
+ ACP_EXTERNAL_INTR_STAT__DMAIOCStat__SHIFT));
+
+ return intr_gen;
+}
+
+void config_acp_dma(void __iomem *acp_mmio,
+ struct audio_substream_data *audio_config)
+{
+ u32 pte_offset;
+
+ if (audio_config->direction == SNDRV_PCM_STREAM_PLAYBACK)
+ pte_offset = PLAYBACK_PTE_OFFSET;
+ else
+ pte_offset = CAPTURE_PTE_OFFSET;
+
+ acp_pte_config(acp_mmio, audio_config->pg, audio_config->num_of_pages,
+ pte_offset);
+
+ /* Configure System memory <-> ACP SRAM DMA descriptors */
+ set_acp_sysmem_dma_descriptors(acp_mmio, audio_config->size,
+ audio_config->direction, pte_offset);
+
+ /* Configure ACP SRAM <-> I2S DMA descriptors */
+ set_acp_to_i2s_dma_descriptors(acp_mmio, audio_config->size,
+ audio_config->direction);
+}
+
+/* Start a given DMA channel transfer */
+void acp_dma_start(void __iomem *acp_mmio,
+ u16 ch_num, bool is_circular)
+{
+ u32 dma_ctrl;
+
+ /* read the dma control register and disable the channel run field */
+ dma_ctrl = acp_reg_read(acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
+
+ /* Invalidating the DAGB cache */
+ acp_reg_write(1, acp_mmio, mmACP_DAGB_ATU_CTRL);
+
+ /* configure the DMA channel and start the DMA transfer
+ * set dmachrun bit to start the transfer and enable the
+ * interrupt on completion of the dma transfer
+ */
+ dma_ctrl |= ACP_DMA_CNTL_0__DMAChRun_MASK;
+
+ switch (ch_num) {
+ case ACP_TO_I2S_DMA_CH_NUM:
+ case ACP_TO_SYSRAM_CH_NUM:
+ case I2S_TO_ACP_DMA_CH_NUM:
+ dma_ctrl |= ACP_DMA_CNTL_0__DMAChIOCEn_MASK;
+ break;
+ default:
+ dma_ctrl &= ~ACP_DMA_CNTL_0__DMAChIOCEn_MASK;
+ break;
+ }
+
+ /* enable for ACP SRAM to/from I2S DMA channel */
+ if (is_circular == true)
+ dma_ctrl |= ACP_DMA_CNTL_0__Circular_DMA_En_MASK;
+ else
+ dma_ctrl &= ~ACP_DMA_CNTL_0__Circular_DMA_En_MASK;
+
+ acp_reg_write(dma_ctrl, acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
+}
+
+/* Stop a given DMA channel transfer */
+int acp_dma_stop(void __iomem *acp_mmio, u8 ch_num)
+{
+ u32 dma_ctrl;
+ u32 dma_ch_sts;
+ u32 count = ACP_DMA_RESET_TIME;
+
+ dma_ctrl = acp_reg_read(acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
+
+ /* clear the dma control register fields before writing zero
+ * in reset bit
+ */
+ dma_ctrl &= ~ACP_DMA_CNTL_0__DMAChRun_MASK;
+ dma_ctrl &= ~ACP_DMA_CNTL_0__DMAChIOCEn_MASK;
+
+ acp_reg_write(dma_ctrl, acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
+ dma_ch_sts = acp_reg_read(acp_mmio, mmACP_DMA_CH_STS);
+
+ if (dma_ch_sts & BIT(ch_num)) {
+ /* set the reset bit for this channel to stop the dma
+ * transfer
+ */
+ dma_ctrl |= ACP_DMA_CNTL_0__DMAChRst_MASK;
+ acp_reg_write(dma_ctrl, acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
+ }
+
+ /* check the channel status bit for some time and return the status */
+ while (true) {
+ dma_ch_sts = acp_reg_read(acp_mmio, mmACP_DMA_CH_STS);
+ if (!(dma_ch_sts & BIT(ch_num))) {
+ /* clear the reset flag after successfully stopping
+ * the dma transfer and break from the loop
+ */
+ dma_ctrl &= ~ACP_DMA_CNTL_0__DMAChRst_MASK;
+
+ acp_reg_write(dma_ctrl, acp_mmio, mmACP_DMA_CNTL_0
+ + ch_num);
+ break;
+ }
+ if (--count == 0) {
+ pr_err("Failed to stop ACP DMA channel : %d\n", ch_num);
+ return -ETIMEDOUT;
+ }
+ udelay(100);
+ }
+ return 0;
+}
+
+/* Initialize and bring ACP hardware to default state. */
+int acp_init(void __iomem *acp_mmio)
+{
+ u32 val;
+ u32 count;
+
+ /* Assert Soft reset of ACP */
+ val = acp_reg_read(acp_mmio, mmACP_SOFT_RESET);
+
+ val |= ACP_SOFT_RESET__SoftResetAud_MASK;
+ acp_reg_write(val, acp_mmio, mmACP_SOFT_RESET);
+
+ count = ACP_SOFT_RESET_DONE_TIME_OUT_VALUE;
+ while (true) {
+ val = acp_reg_read(acp_mmio, mmACP_SOFT_RESET);
+ if (ACP_SOFT_RESET__SoftResetAudDone_MASK ==
+ (val & ACP_SOFT_RESET__SoftResetAudDone_MASK))
+ break;
+ if (--count == 0) {
+ pr_err("Failed to reset ACP\n");
+ return -ETIMEDOUT;
+ }
+ udelay(100);
+ }
+
+ /* Enable clock to ACP and wait until the clock is enabled */
+ val = acp_reg_read(acp_mmio, mmACP_CONTROL);
+ val = val | ACP_CONTROL__ClkEn_MASK;
+ acp_reg_write(val, acp_mmio, mmACP_CONTROL);
+
+ count = ACP_CLOCK_EN_TIME_OUT_VALUE;
+
+ while (true) {
+ val = acp_reg_read(acp_mmio, mmACP_STATUS);
+ if (val & (u32) 0x1)
+ break;
+ if (--count == 0) {
+ pr_err("Failed to reset ACP\n");
+ return -ETIMEDOUT;
+ }
+ udelay(100);
+ }
+
+ /* Deassert the SOFT RESET flags */
+ val = acp_reg_read(acp_mmio, mmACP_SOFT_RESET);
+ val &= ~ACP_SOFT_RESET__SoftResetAud_MASK;
+ acp_reg_write(val, acp_mmio, mmACP_SOFT_RESET);
+
+ /* initiailize Onion control DAGB register */
+ acp_reg_write(ONION_CNTL_DEFAULT, acp_mmio, mmACP_AXI2DAGB_ONION_CNTL);
+
+ /* initiailize Garlic control DAGB registers */
+ acp_reg_write(GARLIC_CNTL_DEFAULT, acp_mmio,
+ mmACP_AXI2DAGB_GARLIC_CNTL);
+
+ acp_dma_descr_init(acp_mmio);
+
+ acp_reg_write(ACP_SRAM_BASE_ADDRESS, acp_mmio,
+ mmACP_DMA_DESC_BASE_ADDR);
+
+ /* Num of descriptiors in SRAM 0x4, means 256 descriptors;(64 * 4) */
+ acp_reg_write(0x4, acp_mmio, mmACP_DMA_DESC_MAX_NUM_DSCR);
+ acp_reg_write(ACP_EXTERNAL_INTR_CNTL__DMAIOCMask_MASK,
+ acp_mmio, mmACP_EXTERNAL_INTR_CNTL);
+
+ /* Designware I2S driver requries proper capabilities
+ * from mmACP_I2SMICSP_COMP_PARAM_1 register. The register
+ * reports playback and capture capabilities though the
+ * MIC instance of DW I2S controller supports capture only
+ * Provide a workaround by masking the capability into a
+ * scratch register and provide scratch register offset as
+ * though it is mmACP_I2SMICSP_COMP_PARAM_1
+ */
+
+ val = acp_reg_read(acp_mmio, mmACP_I2SMICSP_COMP_PARAM_1);
+ val = val & ~BIT(5);
+ acp_reg_write(val, acp_mmio, mmACP_SCRATCH_REG_0);
+ return 0;
+}
+
+/* Deintialize ACP */
+int acp_deinit(void __iomem *acp_mmio)
+{
+ u32 val;
+ u32 count;
+
+ /* Assert Soft reset of ACP */
+ val = acp_reg_read(acp_mmio, mmACP_SOFT_RESET);
+
+ val |= ACP_SOFT_RESET__SoftResetAud_MASK;
+ acp_reg_write(val, acp_mmio, mmACP_SOFT_RESET);
+
+ count = ACP_SOFT_RESET_DONE_TIME_OUT_VALUE;
+ while (true) {
+ val = acp_reg_read(acp_mmio, mmACP_SOFT_RESET);
+ if (ACP_SOFT_RESET__SoftResetAudDone_MASK ==
+ (val & ACP_SOFT_RESET__SoftResetAudDone_MASK))
+ break;
+ if (--count == 0) {
+ pr_err("Failed to reset ACP\n");
+ return -ETIMEDOUT;
+ }
+ udelay(100);
+ }
+ /** Disable ACP clock */
+ val = acp_reg_read(acp_mmio, mmACP_CONTROL);
+ val &= ~ACP_CONTROL__ClkEn_MASK;
+ acp_reg_write(val, acp_mmio, mmACP_CONTROL);
+
+ count = ACP_CLOCK_EN_TIME_OUT_VALUE;
+
+ while (true) {
+ val = acp_reg_read(acp_mmio, mmACP_STATUS);
+ if (!(val & (u32) 0x1))
+ break;
+ if (--count == 0) {
+ pr_err("Failed to reset ACP\n");
+ return -ETIMEDOUT;
+ }
+ udelay(100);
+ }
+ return 0;
+}
diff --git a/sound/soc/amd/acp.h b/sound/soc/amd/acp.h
new file mode 100644
index 0000000..53c30ea
--- /dev/null
+++ b/sound/soc/amd/acp.h
@@ -0,0 +1,139 @@
+#ifndef __ACP_HW_H
+#define __ACP_HW_H
+
+#include "include/acp_2_2_d.h"
+#include "include/acp_2_2_sh_mask.h"
+
+#define PAGE_SIZE_4K 4096
+#define PAGE_SIZE_4K_ENABLE 0x02
+
+#define PLAYBACK_PTE_OFFSET 10
+#define CAPTURE_PTE_OFFSET 0
+
+#define GARLIC_CNTL_DEFAULT 0x00000FB4
+#define 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 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;
+
+extern u32 acp_reg_read(void __iomem *acp_mmio, u32 reg);
+extern void acp_reg_write(u32 val, void __iomem *acp_mmio, u32 reg);
+extern int acp_init(void __iomem *acp_mmio);
+extern int acp_deinit(void __iomem *acp_mmio);
+extern void config_acp_dma_channel(void __iomem *acp_mmio, u8 ch_num,
+ u16 dscr_strt_idx, u16 num_dscrs,
+ enum acp_dma_priority_level priority_level);
+extern void config_acp_dma(void __iomem *acp_mmio,
+ struct audio_substream_data *audio_config);
+extern void acp_dma_start(void __iomem *acp_mmio,
+ u16 ch_num, bool is_circular);
+extern int acp_dma_stop(void __iomem *acp_mmio, u8 ch_num);
+extern void acp_resume(void __iomem *acp_mmio);
+extern void acp_enable_external_interrupts(void __iomem *acp_mmio,
+ int enable);
+extern u32 acp_get_intr_flag(void __iomem *acp_mmio);
+extern u16 get_dscr_idx(void __iomem *acp_mmio, int direction);
+extern void acp_ext_stat_clear_dmaioc(void __iomem *acp_mmio, u8 ch_num);
+
+#endif /*__ACP_HW_H */
--
1.8.3.1
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