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Diffstat (limited to 'sound/soc/qcom/lpass.h')
| -rw-r--r-- | sound/soc/qcom/lpass.h | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/sound/soc/qcom/lpass.h b/sound/soc/qcom/lpass.h new file mode 100644 index 000000000..b848db2d6 --- /dev/null +++ b/sound/soc/qcom/lpass.h @@ -0,0 +1,105 @@ +/* + * Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that 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. + * + * lpass.h - Definitions for the QTi LPASS + */ + +#ifndef __LPASS_H__ +#define __LPASS_H__ + +#include <linux/clk.h> +#include <linux/compiler.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> + +#define LPASS_AHBIX_CLOCK_FREQUENCY 131072000 +#define LPASS_MAX_MI2S_PORTS (8) +#define LPASS_MAX_DMA_CHANNELS (8) + +/* Both the CPU DAI and platform drivers will access this data */ +struct lpass_data { + + /* AHB-I/X bus clocks inside the low-power audio subsystem (LPASS) */ + struct clk *ahbix_clk; + + /* MI2S system clock */ + struct clk *mi2s_osr_clk[LPASS_MAX_MI2S_PORTS]; + + /* MI2S bit clock (derived from system clock by a divider */ + struct clk *mi2s_bit_clk[LPASS_MAX_MI2S_PORTS]; + + /* low-power audio interface (LPAIF) registers */ + void __iomem *lpaif; + + /* regmap backed by the low-power audio interface (LPAIF) registers */ + struct regmap *lpaif_map; + + /* interrupts from the low-power audio interface (LPAIF) */ + int lpaif_irq; + + /* SOC specific variations in the LPASS IP integration */ + struct lpass_variant *variant; + + /* bit map to keep track of static channel allocations */ + unsigned long dma_ch_bit_map; + + /* used it for handling interrupt per dma channel */ + struct snd_pcm_substream *substream[LPASS_MAX_DMA_CHANNELS]; + + /* 8016 specific */ + struct clk *pcnoc_mport_clk; + struct clk *pcnoc_sway_clk; + +}; + +/* Vairant data per each SOC */ +struct lpass_variant { + u32 i2sctrl_reg_base; + u32 i2sctrl_reg_stride; + u32 i2s_ports; + u32 irq_reg_base; + u32 irq_reg_stride; + u32 irq_ports; + u32 rdma_reg_base; + u32 rdma_reg_stride; + u32 rdma_channels; + u32 wrdma_reg_base; + u32 wrdma_reg_stride; + u32 wrdma_channels; + + /** + * on SOCs like APQ8016 the channel control bits start + * at different offset to ipq806x + **/ + u32 dmactl_audif_start; + u32 wrdma_channel_start; + /* SOC specific initialization like clocks */ + int (*init)(struct platform_device *pdev); + int (*exit)(struct platform_device *pdev); + int (*alloc_dma_channel)(struct lpass_data *data, int direction); + int (*free_dma_channel)(struct lpass_data *data, int ch); + + /* SOC specific dais */ + struct snd_soc_dai_driver *dai_driver; + int num_dai; + const char * const *dai_osr_clk_names; + const char * const *dai_bit_clk_names; +}; + +/* register the platform driver from the CPU DAI driver */ +int asoc_qcom_lpass_platform_register(struct platform_device *); +int asoc_qcom_lpass_cpu_platform_remove(struct platform_device *pdev); +int asoc_qcom_lpass_cpu_platform_probe(struct platform_device *pdev); +int asoc_qcom_lpass_cpu_dai_probe(struct snd_soc_dai *dai); +extern const struct snd_soc_dai_ops asoc_qcom_lpass_cpu_dai_ops; + +#endif /* __LPASS_H__ */ |