diff options
author | Takashi Iwai <tiwai@suse.de> | 2016-01-11 16:24:58 +0100 |
---|---|---|
committer | Takashi Iwai <tiwai@suse.de> | 2016-01-11 17:50:15 +0100 |
commit | 815ad8623695c7f2aafc216b923b131f1ee12df6 (patch) | |
tree | f66eeed2a0dfd011a6207360b81c18e3ffabb583 /sound | |
parent | 56f27013482c0803d978b667fe85de04ce9357cd (diff) | |
parent | d0021d3bdfe9d551859bca1f58da0e6be8e26043 (diff) |
Merge tag 'asoc-v4.4-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-next
ASoC: Last updates for v4.5
A bunch more updates for v4.5, mainly driver work:
- More topology API enhancements from Mengdong Lin working towards
making everything more component based and being able to specify PCM
links via topology.
- Large sets driver updates from Cirrus, Intel (mainly more Skylake
support) and Renesas.
- New driver for AMD ACP
- Rename PCM1792a driver to be generic pcm179x
Diffstat (limited to 'sound')
54 files changed, 7092 insertions, 560 deletions
diff --git a/sound/hda/ext/hdac_ext_controller.c b/sound/hda/ext/hdac_ext_controller.c index 63215b17247c..548cc1e4114b 100644 --- a/sound/hda/ext/hdac_ext_controller.c +++ b/sound/hda/ext/hdac_ext_controller.c @@ -77,6 +77,12 @@ int snd_hdac_ext_bus_parse_capabilities(struct hdac_ext_bus *ebus) ebus->spbcap = bus->remap_addr + offset; break; + case AZX_DRSM_CAP_ID: + /* DMA resume capability found, handler function */ + dev_dbg(bus->dev, "Found DRSM capability\n"); + ebus->drsmcap = bus->remap_addr + offset; + break; + default: dev_dbg(bus->dev, "Unknown capability %d\n", cur_cap); break; @@ -240,7 +246,7 @@ static int check_hdac_link_power_active(struct hdac_ext_link *link, bool enable) int mask = (1 << AZX_MLCTL_CPA); udelay(3); - timeout = 50; + timeout = 150; do { val = readl(link->ml_addr + AZX_REG_ML_LCTL); @@ -282,6 +288,27 @@ int snd_hdac_ext_bus_link_power_down(struct hdac_ext_link *link) EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_down); /** + * snd_hdac_ext_bus_link_power_up_all -power up all hda link + * @ebus: HD-audio extended bus + */ +int snd_hdac_ext_bus_link_power_up_all(struct hdac_ext_bus *ebus) +{ + struct hdac_ext_link *hlink = NULL; + int ret; + + list_for_each_entry(hlink, &ebus->hlink_list, list) { + snd_hdac_updatel(hlink->ml_addr, + AZX_REG_ML_LCTL, 0, AZX_MLCTL_SPA); + ret = check_hdac_link_power_active(hlink, true); + if (ret < 0) + return ret; + } + + return 0; +} +EXPORT_SYMBOL_GPL(snd_hdac_ext_bus_link_power_up_all); + +/** * snd_hdac_ext_bus_link_power_down_all -power down all hda link * @ebus: HD-audio extended bus */ diff --git a/sound/hda/ext/hdac_ext_stream.c b/sound/hda/ext/hdac_ext_stream.c index cb89ec7c8147..023cc4cad5c1 100644 --- a/sound/hda/ext/hdac_ext_stream.c +++ b/sound/hda/ext/hdac_ext_stream.c @@ -59,6 +59,10 @@ void snd_hdac_ext_stream_init(struct hdac_ext_bus *ebus, AZX_SPB_MAXFIFO; } + if (ebus->drsmcap) + stream->dpibr_addr = ebus->drsmcap + AZX_DRSM_BASE + + AZX_DRSM_INTERVAL * idx; + stream->decoupled = false; snd_hdac_stream_init(bus, &stream->hstream, idx, direction, tag); } @@ -107,6 +111,7 @@ void snd_hdac_stream_free_all(struct hdac_ext_bus *ebus) while (!list_empty(&bus->stream_list)) { s = list_first_entry(&bus->stream_list, struct hdac_stream, list); stream = stream_to_hdac_ext_stream(s); + snd_hdac_ext_stream_decouple(ebus, stream, false); list_del(&s->list); kfree(stream); } @@ -497,3 +502,70 @@ void snd_hdac_ext_stop_streams(struct hdac_ext_bus *ebus) } } EXPORT_SYMBOL_GPL(snd_hdac_ext_stop_streams); + +/** + * snd_hdac_ext_stream_drsm_enable - enable DMA resume for a stream + * @ebus: HD-audio ext core bus + * @enable: flag to enable/disable DRSM + * @index: stream index for which DRSM need to be enabled + */ +void snd_hdac_ext_stream_drsm_enable(struct hdac_ext_bus *ebus, + bool enable, int index) +{ + u32 mask = 0; + u32 register_mask = 0; + struct hdac_bus *bus = &ebus->bus; + + if (!ebus->drsmcap) { + dev_err(bus->dev, "Address of DRSM capability is NULL"); + return; + } + + mask |= (1 << index); + + register_mask = readl(ebus->drsmcap + AZX_REG_SPB_SPBFCCTL); + + mask |= register_mask; + + if (enable) + snd_hdac_updatel(ebus->drsmcap, AZX_REG_DRSM_CTL, 0, mask); + else + snd_hdac_updatel(ebus->drsmcap, AZX_REG_DRSM_CTL, mask, 0); +} +EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_drsm_enable); + +/** + * snd_hdac_ext_stream_set_dpibr - sets the dpibr value of a stream + * @ebus: HD-audio ext core bus + * @stream: hdac_ext_stream + * @value: dpib value to set + */ +int snd_hdac_ext_stream_set_dpibr(struct hdac_ext_bus *ebus, + struct hdac_ext_stream *stream, u32 value) +{ + struct hdac_bus *bus = &ebus->bus; + + if (!ebus->drsmcap) { + dev_err(bus->dev, "Address of DRSM capability is NULL"); + return -EINVAL; + } + + writel(value, stream->dpibr_addr); + + return 0; +} +EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_set_dpibr); + +/** + * snd_hdac_ext_stream_set_lpib - sets the lpib value of a stream + * @ebus: HD-audio ext core bus + * @stream: hdac_ext_stream + * @value: lpib value to set + */ +int snd_hdac_ext_stream_set_lpib(struct hdac_ext_stream *stream, u32 value) +{ + snd_hdac_stream_writel(&stream->hstream, SD_LPIB, value); + + return 0; +} +EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_set_lpib); diff --git a/sound/soc/Kconfig b/sound/soc/Kconfig index a012b2655e84..7ea66ee3653f 100644 --- a/sound/soc/Kconfig +++ b/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" diff --git a/sound/soc/Makefile b/sound/soc/Makefile index 78625fae78d6..9a30f21d16ee 100644 --- a/sound/soc/Makefile +++ b/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/ diff --git a/sound/soc/amd/Kconfig b/sound/soc/amd/Kconfig new file mode 100644 index 000000000000..78187eb24f56 --- /dev/null +++ b/sound/soc/amd/Kconfig @@ -0,0 +1,4 @@ +config SND_SOC_AMD_ACP + tristate "AMD Audio Coprocessor support" + help + This option enables ACP DMA support on AMD platform. diff --git a/sound/soc/amd/Makefile b/sound/soc/amd/Makefile new file mode 100644 index 000000000000..1a66ec0366b2 --- /dev/null +++ b/sound/soc/amd/Makefile @@ -0,0 +1,3 @@ +snd-soc-acp-pcm-objs := acp-pcm-dma.o + +obj-$(CONFIG_SND_SOC_AMD_ACP) += snd-soc-acp-pcm.o diff --git a/sound/soc/amd/acp-pcm-dma.c b/sound/soc/amd/acp-pcm-dma.c new file mode 100644 index 000000000000..3191e0a7d273 --- /dev/null +++ b/sound/soc/amd/acp-pcm-dma.c @@ -0,0 +1,1043 @@ +/* + * AMD ALSA SoC PCM Driver for ACP 2.x + * + * Copyright 2014-2015 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/module.h> +#include <linux/delay.h> +#include <linux/io.h> +#include <linux/sizes.h> +#include <linux/pm_runtime.h> + +#include <sound/soc.h> + +#include "acp.h" + +#define PLAYBACK_MIN_NUM_PERIODS 2 +#define PLAYBACK_MAX_NUM_PERIODS 2 +#define PLAYBACK_MAX_PERIOD_SIZE 16384 +#define PLAYBACK_MIN_PERIOD_SIZE 1024 +#define CAPTURE_MIN_NUM_PERIODS 2 +#define CAPTURE_MAX_NUM_PERIODS 2 +#define CAPTURE_MAX_PERIOD_SIZE 16384 +#define CAPTURE_MIN_PERIOD_SIZE 1024 + +#define MAX_BUFFER (PLAYBACK_MAX_PERIOD_SIZE * PLAYBACK_MAX_NUM_PERIODS) +#define MIN_BUFFER MAX_BUFFER + +static const struct snd_pcm_hardware acp_pcm_hardware_playback = { + .info = SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BATCH | + SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME, + .formats = SNDRV_PCM_FMTBIT_S16_LE | + SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE, + .channels_min = 1, + .channels_max = 8, + .rates = SNDRV_PCM_RATE_8000_96000, + .rate_min = 8000, + .rate_max = 96000, + .buffer_bytes_max = PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE, + .period_bytes_min = PLAYBACK_MIN_PERIOD_SIZE, + .period_bytes_max = PLAYBACK_MAX_PERIOD_SIZE, + .periods_min = PLAYBACK_MIN_NUM_PERIODS, + .periods_max = PLAYBACK_MAX_NUM_PERIODS, +}; + +static const struct snd_pcm_hardware acp_pcm_hardware_capture = { + .info = SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BATCH | + SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME, + .formats = SNDRV_PCM_FMTBIT_S16_LE | + SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE, + .channels_min = 1, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_8000_48000, + .rate_min = 8000, + .rate_max = 48000, + .buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE, + .period_bytes_min = CAPTURE_MIN_PERIOD_SIZE, + .period_bytes_max = CAPTURE_MAX_PERIOD_SIZE, + .periods_min = CAPTURE_MIN_NUM_PERIODS, + .periods_max = CAPTURE_MAX_NUM_PERIODS, +}; + +struct audio_drv_data { + struct snd_pcm_substream *play_stream; + struct snd_pcm_substream *capture_stream; + void __iomem *acp_mmio; +}; + +static u32 acp_reg_read(void __iomem *acp_mmio, u32 reg) +{ + return readl(acp_mmio + (reg * 4)); +} + +static 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 + */ +static 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 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 i; + u16 dma_dscr_idx = PLAYBACK_START_DMA_DESCR_CH12; + acp_dma_dscr_transfer_t dmadscr[NUM_DSCRS_PER_CHANNEL]; + + for (i = 0; i < NUM_DSCRS_PER_CHANNEL; i++) { + dmadscr[i].xfer_val = 0; + if (direction == SNDRV_PCM_STREAM_PLAYBACK) { + dma_dscr_idx = PLAYBACK_START_DMA_DESCR_CH12 + i; + dmadscr[i].dest = ACP_SHARED_RAM_BANK_1_ADDRESS + + (size / 2) - (i * (size/2)); + dmadscr[i].src = ACP_INTERNAL_APERTURE_WINDOW_0_ADDRESS + + (pte_offset * SZ_4K) + (i * (size/2)); + dmadscr[i].xfer_val |= + (ACP_DMA_ATTRIBUTES_DAGB_ONION_TO_SHAREDMEM << 16) | + (size / 2); + } else { + dma_dscr_idx = CAPTURE_START_DMA_DESCR_CH14 + i; + dmadscr[i].src = ACP_SHARED_RAM_BANK_5_ADDRESS + + (i * (size/2)); + dmadscr[i].dest = ACP_INTERNAL_APERTURE_WINDOW_0_ADDRESS + + (pte_offset * SZ_4K) + + (i * (size/2)); + dmadscr[i].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[i]); + } + if (direction == SNDRV_PCM_STREAM_PLAYBACK) + config_acp_dma_channel(acp_mmio, SYSRAM_TO_ACP_CH_NUM, + PLAYBACK_START_DMA_DESCR_CH12, + NUM_DSCRS_PER_CHANNEL, + ACP_DMA_PRIORITY_LEVEL_NORMAL); + else + config_acp_dma_channel(acp_mmio, ACP_TO_SYSRAM_CH_NUM, + CAPTURE_START_DMA_DESCR_CH14, + NUM_DSCRS_PER_CHANNEL, + 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 i; + u16 dma_dscr_idx = PLAYBACK_START_DMA_DESCR_CH13; + acp_dma_dscr_transfer_t dmadscr[NUM_DSCRS_PER_CHANNEL]; + + for (i = 0; i < NUM_DSCRS_PER_CHANNEL; i++) { + dmadscr[i].xfer_val = 0; + if (direction == SNDRV_PCM_STREAM_PLAYBACK) { + dma_dscr_idx = PLAYBACK_START_DMA_DESCR_CH13 + i; + dmadscr[i].src = ACP_SHARED_RAM_BANK_1_ADDRESS + + (i * (size/2)); + /* dmadscr[i].dest is unused by hardware. */ + dmadscr[i].dest = 0; + dmadscr[i].xfer_val |= BIT(22) | (TO_ACP_I2S_1 << 16) | + (size / 2); + } else { + dma_dscr_idx = CAPTURE_START_DMA_DESCR_CH15 + i; + /* dmadscr[i].src is unused by hardware. */ + dmadscr[i].src = 0; + dmadscr[i].dest = ACP_SHARED_RAM_BANK_5_ADDRESS + + (i * (size / 2)); + dmadscr[i].xfer_val |= BIT(22) | + (FROM_ACP_I2S_1 << 16) | (size / 2); + } + config_dma_descriptor_in_sram(acp_mmio, dma_dscr_idx, + &dmadscr[i]); + } + /* Configure the DMA channel with the above descriptore */ + if (direction == SNDRV_PCM_STREAM_PLAYBACK) + config_acp_dma_channel(acp_mmio, ACP_TO_I2S_DMA_CH_NUM, + PLAYBACK_START_DMA_DESCR_CH13, + NUM_DSCRS_PER_CHANNEL, + ACP_DMA_PRIORITY_LEVEL_NORMAL); + else + config_acp_dma_channel(acp_mmio, I2S_TO_ACP_DMA_CH_NUM, + CAPTURE_START_DMA_DESCR_CH15, + NUM_DSCRS_PER_CHANNEL, + ACP_DMA_PRIORITY_LEVEL_NORMAL); +} + +/* 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++; + } +} + +static 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 = ACP_PLAYBACK_PTE_OFFSET; + else + pte_offset = ACP_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 */ +static 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 */ +static 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; +} + +static void acp_set_sram_bank_state(void __iomem *acp_mmio, u16 bank, + bool power_on) +{ + u32 val, req_reg, sts_reg, sts_reg_mask; + u32 loops = 1000; + + if (bank < 32) { + req_reg = mmACP_MEM_SHUT_DOWN_REQ_LO; + sts_reg = mmACP_MEM_SHUT_DOWN_STS_LO; + sts_reg_mask = 0xFFFFFFFF; + + } else { + bank -= 32; + req_reg = mmACP_MEM_SHUT_DOWN_REQ_HI; + sts_reg = mmACP_MEM_SHUT_DOWN_STS_HI; + sts_reg_mask = 0x0000FFFF; + } + + val = acp_reg_read(acp_mmio, req_reg); + if (val & (1 << bank)) { + /* bank is in off state */ + if (power_on == true) + /* request to on */ + val &= ~(1 << bank); + else + /* request to off */ + return; + } else { + /* bank is in on state */ + if (power_on == false) + /* request to off */ + val |= 1 << bank; + else + /* request to on */ + return; + } + acp_reg_write(val, acp_mmio, req_reg); + + while (acp_reg_read(acp_mmio, sts_reg) != sts_reg_mask) { + if (!loops--) { + pr_err("ACP SRAM bank %d state change failed\n", bank); + break; + } + cpu_relax(); + } +} + +/* Initialize and bring ACP hardware to default state. */ +static int acp_init(void __iomem *acp_mmio) +{ + u16 bank; + u32 val, count, sram_pte_offset; + + /* 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__SoftRese |