diff options
Diffstat (limited to 'kernel/sound/soc/sh/rcar/src.c')
| -rw-r--r-- | kernel/sound/soc/sh/rcar/src.c | 1061 |
1 files changed, 1061 insertions, 0 deletions
diff --git a/kernel/sound/soc/sh/rcar/src.c b/kernel/sound/soc/sh/rcar/src.c new file mode 100644 index 000000000..3beb32eb4 --- /dev/null +++ b/kernel/sound/soc/sh/rcar/src.c @@ -0,0 +1,1061 @@ +/* + * Renesas R-Car SRC support + * + * Copyright (C) 2013 Renesas Solutions Corp. + * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include "rsnd.h" + +#define SRC_NAME "src" + +/* SRCx_STATUS */ +#define OUF_SRCO ((1 << 12) | (1 << 13)) +#define OUF_SRCI ((1 << 9) | (1 << 8)) + +/* SCU_SYSTEM_STATUS0/1 */ +#define OUF_SRC(id) ((1 << (id + 16)) | (1 << id)) + +struct rsnd_src { + struct rsnd_src_platform_info *info; /* rcar_snd.h */ + struct rsnd_mod mod; + struct rsnd_kctrl_cfg_s sen; /* sync convert enable */ + struct rsnd_kctrl_cfg_s sync; /* sync convert */ + u32 convert_rate; /* sampling rate convert */ + int err; +}; + +#define RSND_SRC_NAME_SIZE 16 + +#define rsnd_enable_sync_convert(src) ((src)->sen.val) +#define rsnd_src_of_node(priv) \ + of_get_child_by_name(rsnd_priv_to_dev(priv)->of_node, "rcar_sound,src") + +#define rsnd_mod_to_src(_mod) \ + container_of((_mod), struct rsnd_src, mod) + +#define for_each_rsnd_src(pos, priv, i) \ + for ((i) = 0; \ + ((i) < rsnd_src_nr(priv)) && \ + ((pos) = (struct rsnd_src *)(priv)->src + i); \ + i++) + + +/* + * image of SRC (Sampling Rate Converter) + * + * 96kHz <-> +-----+ 48kHz +-----+ 48kHz +-------+ + * 48kHz <-> | SRC | <------> | SSI | <-----> | codec | + * 44.1kHz <-> +-----+ +-----+ +-------+ + * ... + * + */ + +/* + * src.c is caring... + * + * Gen1 + * + * [mem] -> [SRU] -> [SSI] + * |--------| + * + * Gen2 + * + * [mem] -> [SRC] -> [SSIU] -> [SSI] + * |-----------------| + */ + +/* + * How to use SRC bypass mode for debugging + * + * SRC has bypass mode, and it is useful for debugging. + * In Gen2 case, + * SRCm_MODE controls whether SRC is used or not + * SSI_MODE0 controls whether SSIU which receives SRC data + * is used or not. + * Both SRCm_MODE/SSI_MODE0 settings are needed if you use SRC, + * but SRC bypass mode needs SSI_MODE0 only. + * + * This driver request + * struct rsnd_src_platform_info { + * u32 convert_rate; + * int dma_id; + * } + * + * rsnd_src_convert_rate() indicates + * above convert_rate, and it controls + * whether SRC is used or not. + * + * ex) doesn't use SRC + * static struct rsnd_dai_platform_info rsnd_dai = { + * .playback = { .ssi = &rsnd_ssi[0], }, + * }; + * + * ex) uses SRC + * static struct rsnd_src_platform_info rsnd_src[] = { + * RSND_SCU(48000, 0), + * ... + * }; + * static struct rsnd_dai_platform_info rsnd_dai = { + * .playback = { .ssi = &rsnd_ssi[0], .src = &rsnd_src[0] }, + * }; + * + * ex) uses SRC bypass mode + * static struct rsnd_src_platform_info rsnd_src[] = { + * RSND_SCU(0, 0), + * ... + * }; + * static struct rsnd_dai_platform_info rsnd_dai = { + * .playback = { .ssi = &rsnd_ssi[0], .src = &rsnd_src[0] }, + * }; + * + */ + +/* + * Gen1/Gen2 common functions + */ +static struct dma_chan *rsnd_src_dma_req(struct rsnd_mod *mod) +{ + struct rsnd_priv *priv = rsnd_mod_to_priv(mod); + struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); + int is_play = rsnd_io_is_play(io); + + return rsnd_dma_request_channel(rsnd_src_of_node(priv), + mod, + is_play ? "rx" : "tx"); +} + +int rsnd_src_ssiu_start(struct rsnd_mod *ssi_mod, + int use_busif) +{ + struct rsnd_dai_stream *io = rsnd_mod_to_io(ssi_mod); + struct rsnd_dai *rdai = rsnd_io_to_rdai(io); + struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); + int ssi_id = rsnd_mod_id(ssi_mod); + + /* + * SSI_MODE0 + */ + rsnd_mod_bset(ssi_mod, SSI_MODE0, (1 << ssi_id), + !use_busif << ssi_id); + + /* + * SSI_MODE1 + */ + if (rsnd_ssi_is_pin_sharing(ssi_mod)) { + int shift = -1; + switch (ssi_id) { + case 1: + shift = 0; + break; + case 2: + shift = 2; + break; + case 4: + shift = 16; + break; + } + + if (shift >= 0) + rsnd_mod_bset(ssi_mod, SSI_MODE1, + 0x3 << shift, + rsnd_rdai_is_clk_master(rdai) ? + 0x2 << shift : 0x1 << shift); + } + + /* + * DMA settings for SSIU + */ + if (use_busif) { + u32 val = 0x76543210; + u32 mask = ~0; + + rsnd_mod_write(ssi_mod, SSI_BUSIF_ADINR, + rsnd_get_adinr(ssi_mod)); + rsnd_mod_write(ssi_mod, SSI_BUSIF_MODE, 1); + rsnd_mod_write(ssi_mod, SSI_CTRL, 0x1); + + mask <<= runtime->channels * 4; + val = val & mask; + + switch (runtime->sample_bits) { + case 16: + val |= 0x67452301 & ~mask; + break; + case 32: + val |= 0x76543210 & ~mask; + break; + } + rsnd_mod_write(ssi_mod, BUSIF_DALIGN, val); + + } + + return 0; +} + +int rsnd_src_ssiu_stop(struct rsnd_mod *ssi_mod) +{ + /* + * DMA settings for SSIU + */ + rsnd_mod_write(ssi_mod, SSI_CTRL, 0); + + return 0; +} + +int rsnd_src_ssi_irq_enable(struct rsnd_mod *ssi_mod) +{ + struct rsnd_priv *priv = rsnd_mod_to_priv(ssi_mod); + + if (rsnd_is_gen1(priv)) + return 0; + + /* enable SSI interrupt if Gen2 */ + if (rsnd_ssi_is_dma_mode(ssi_mod)) + rsnd_mod_write(ssi_mod, INT_ENABLE, 0x0e000000); + else + rsnd_mod_write(ssi_mod, INT_ENABLE, 0x0f000000); + + return 0; +} + +int rsnd_src_ssi_irq_disable(struct rsnd_mod *ssi_mod) +{ + struct rsnd_priv *priv = rsnd_mod_to_priv(ssi_mod); + + if (rsnd_is_gen1(priv)) + return 0; + + /* disable SSI interrupt if Gen2 */ + rsnd_mod_write(ssi_mod, INT_ENABLE, 0x00000000); + + return 0; +} + +static u32 rsnd_src_convert_rate(struct rsnd_src *src) +{ + struct rsnd_mod *mod = &src->mod; + struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); + struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); + u32 convert_rate; + + if (!runtime) + return 0; + + if (!rsnd_enable_sync_convert(src)) + return src->convert_rate; + + convert_rate = src->sync.val; + + if (!convert_rate) + convert_rate = src->convert_rate; + + if (!convert_rate) + convert_rate = runtime->rate; + + return convert_rate; +} + +unsigned int rsnd_src_get_ssi_rate(struct rsnd_priv *priv, + struct rsnd_dai_stream *io, + struct snd_pcm_runtime *runtime) +{ + struct rsnd_mod *src_mod = rsnd_io_to_mod_src(io); + struct rsnd_src *src; + unsigned int rate = 0; + + if (src_mod) { + src = rsnd_mod_to_src(src_mod); + + /* + * return convert rate if SRC is used, + * otherwise, return runtime->rate as usual + */ + rate = rsnd_src_convert_rate(src); + } + + if (!rate) + rate = runtime->rate; + + return rate; +} + +static int rsnd_src_set_convert_rate(struct rsnd_mod *mod) +{ + struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); + struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); + struct rsnd_src *src = rsnd_mod_to_src(mod); + u32 convert_rate = rsnd_src_convert_rate(src); + u32 fsrate = 0; + + if (convert_rate) + fsrate = 0x0400000 / convert_rate * runtime->rate; + + /* set/clear soft reset */ + rsnd_mod_write(mod, SRC_SWRSR, 0); + rsnd_mod_write(mod, SRC_SWRSR, 1); + + /* Set channel number and output bit length */ + rsnd_mod_write(mod, SRC_ADINR, rsnd_get_adinr(mod)); + + /* Enable the initial value of IFS */ + if (fsrate) { + rsnd_mod_write(mod, SRC_IFSCR, 1); + + /* Set initial value of IFS */ + rsnd_mod_write(mod, SRC_IFSVR, fsrate); + } + + /* use DMA transfer */ + rsnd_mod_write(mod, SRC_BUSIF_MODE, 1); + + return 0; +} + +static int rsnd_src_hw_params(struct rsnd_mod *mod, + struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *fe_params) +{ + struct rsnd_src *src = rsnd_mod_to_src(mod); + struct snd_soc_pcm_runtime *fe = substream->private_data; + + /* default value (mainly for non-DT) */ + src->convert_rate = src->info->convert_rate; + + /* + * SRC assumes that it is used under DPCM if user want to use + * sampling rate convert. Then, SRC should be FE. + * And then, this function will be called *after* BE settings. + * this means, each BE already has fixuped hw_params. + * see + * dpcm_fe_dai_hw_params() + * dpcm_be_dai_hw_params() + */ + if (fe->dai_link->dynamic) { + int stream = substream->stream; + struct snd_soc_dpcm *dpcm; + struct snd_pcm_hw_params *be_params; + + list_for_each_entry(dpcm, &fe->dpcm[stream].be_clients, list_be) { + be_params = &dpcm->hw_params; + + if (params_rate(fe_params) != params_rate(be_params)) + src->convert_rate = params_rate(be_params); + } + } + + return 0; +} + +static int rsnd_src_init(struct rsnd_mod *mod, + struct rsnd_priv *priv) +{ + struct rsnd_src *src = rsnd_mod_to_src(mod); + + rsnd_mod_hw_start(mod); + + src->err = 0; + + /* reset sync convert_rate */ + src->sync.val = 0; + + /* + * Initialize the operation of the SRC internal circuits + * see rsnd_src_start() + */ + rsnd_mod_write(mod, SRC_SRCIR, 1); + + return 0; +} + +static int rsnd_src_quit(struct rsnd_mod *mod, + struct rsnd_priv *priv) +{ + struct rsnd_src *src = rsnd_mod_to_src(mod); + struct device *dev = rsnd_priv_to_dev(priv); + + rsnd_mod_hw_stop(mod); + + if (src->err) + dev_warn(dev, "%s[%d] under/over flow err = %d\n", + rsnd_mod_name(mod), rsnd_mod_id(mod), src->err); + + src->convert_rate = 0; + + /* reset sync convert_rate */ + src->sync.val = 0; + + return 0; +} + +static int rsnd_src_start(struct rsnd_mod *mod) +{ + /* + * Cancel the initialization and operate the SRC function + * see rsnd_src_init() + */ + rsnd_mod_write(mod, SRC_SRCIR, 0); + + return 0; +} + +static int rsnd_src_stop(struct rsnd_mod *mod) +{ + /* nothing to do */ + return 0; +} + +/* + * Gen1 functions + */ +static int rsnd_src_set_route_gen1(struct rsnd_mod *mod) +{ + struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); + struct src_route_config { + u32 mask; + int shift; + } routes[] = { + { 0xF, 0, }, /* 0 */ + { 0xF, 4, }, /* 1 */ + { 0xF, 8, }, /* 2 */ + { 0x7, 12, }, /* 3 */ + { 0x7, 16, }, /* 4 */ + { 0x7, 20, }, /* 5 */ + { 0x7, 24, }, /* 6 */ + { 0x3, 28, }, /* 7 */ + { 0x3, 30, }, /* 8 */ + }; + u32 mask; + u32 val; + int id; + + id = rsnd_mod_id(mod); + if (id < 0 || id >= ARRAY_SIZE(routes)) + return -EIO; + + /* + * SRC_ROUTE_SELECT + */ + val = rsnd_io_is_play(io) ? 0x1 : 0x2; + val = val << routes[id].shift; + mask = routes[id].mask << routes[id].shift; + + rsnd_mod_bset(mod, SRC_ROUTE_SEL, mask, val); + + return 0; +} + +static int rsnd_src_set_convert_timing_gen1(struct rsnd_mod *mod) +{ + struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); + struct rsnd_priv *priv = rsnd_mod_to_priv(mod); + struct rsnd_src *src = rsnd_mod_to_src(mod); + struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); + u32 convert_rate = rsnd_src_convert_rate(src); + u32 mask; + u32 val; + int shift; + int id = rsnd_mod_id(mod); + int ret; + + /* + * SRC_TIMING_SELECT + */ + shift = (id % 4) * 8; + mask = 0x1F << shift; + + /* + * ADG is used as source clock if SRC was used, + * then, SSI WS is used as destination clock. + * SSI WS is used as source clock if SRC is not used + * (when playback, source/destination become reverse when capture) + */ + ret = 0; + if (convert_rate) { + /* use ADG */ + val = 0; + ret = rsnd_adg_set_convert_clk_gen1(priv, mod, + runtime->rate, + convert_rate); + } else if (8 == id) { + /* use SSI WS, but SRU8 is special */ + val = id << shift; + } else { + /* use SSI WS */ + val = (id + 1) << shift; + } + + if (ret < 0) + return ret; + + switch (id / 4) { + case 0: + rsnd_mod_bset(mod, SRC_TMG_SEL0, mask, val); + break; + case 1: + rsnd_mod_bset(mod, SRC_TMG_SEL1, mask, val); + break; + case 2: + rsnd_mod_bset(mod, SRC_TMG_SEL2, mask, val); + break; + } + + return 0; +} + +static int rsnd_src_set_convert_rate_gen1(struct rsnd_mod *mod) +{ + struct rsnd_src *src = rsnd_mod_to_src(mod); + int ret; + + ret = rsnd_src_set_convert_rate(mod); + if (ret < 0) + return ret; + + /* Select SRC mode (fixed value) */ + rsnd_mod_write(mod, SRC_SRCCR, 0x00010110); + + /* Set the restriction value of the FS ratio (98%) */ + rsnd_mod_write(mod, SRC_MNFSR, + rsnd_mod_read(mod, SRC_IFSVR) / 100 * 98); + + /* Gen1/Gen2 are not compatible */ + if (rsnd_src_convert_rate(src)) + rsnd_mod_write(mod, SRC_ROUTE_MODE0, 1); + + /* no SRC_BFSSR settings, since SRC_SRCCR::BUFMD is 0 */ + + return 0; +} + +static int rsnd_src_init_gen1(struct rsnd_mod *mod, + struct rsnd_priv *priv) +{ + int ret; + + ret = rsnd_src_init(mod, priv); + if (ret < 0) + return ret; + + ret = rsnd_src_set_route_gen1(mod); + if (ret < 0) + return ret; + + ret = rsnd_src_set_convert_rate_gen1(mod); + if (ret < 0) + return ret; + + ret = rsnd_src_set_convert_timing_gen1(mod); + if (ret < 0) + return ret; + + return 0; +} + +static int rsnd_src_start_gen1(struct rsnd_mod *mod, + struct rsnd_priv *priv) +{ + int id = rsnd_mod_id(mod); + + rsnd_mod_bset(mod, SRC_ROUTE_CTRL, (1 << id), (1 << id)); + + return rsnd_src_start(mod); +} + +static int rsnd_src_stop_gen1(struct rsnd_mod *mod, + struct rsnd_priv *priv) +{ + int id = rsnd_mod_id(mod); + + rsnd_mod_bset(mod, SRC_ROUTE_CTRL, (1 << id), 0); + + return rsnd_src_stop(mod); +} + +static struct rsnd_mod_ops rsnd_src_gen1_ops = { + .name = SRC_NAME, + .dma_req = rsnd_src_dma_req, + .init = rsnd_src_init_gen1, + .quit = rsnd_src_quit, + .start = rsnd_src_start_gen1, + .stop = rsnd_src_stop_gen1, + .hw_params = rsnd_src_hw_params, +}; + +/* + * Gen2 functions + */ +#define rsnd_src_irq_enable_gen2(mod) rsnd_src_irq_ctrol_gen2(mod, 1) +#define rsnd_src_irq_disable_gen2(mod) rsnd_src_irq_ctrol_gen2(mod, 0) +static void rsnd_src_irq_ctrol_gen2(struct rsnd_mod *mod, int enable) +{ + struct rsnd_src *src = rsnd_mod_to_src(mod); + u32 sys_int_val, int_val, sys_int_mask; + int irq = src->info->irq; + int id = rsnd_mod_id(mod); + + sys_int_val = + sys_int_mask = OUF_SRC(id); + int_val = 0x3300; + + /* + * IRQ is not supported on non-DT + * see + * rsnd_src_probe_gen2() + */ + if ((irq <= 0) || !enable) { + sys_int_val = 0; + int_val = 0; + } + + rsnd_mod_write(mod, SRC_INT_ENABLE0, int_val); + rsnd_mod_bset(mod, SCU_SYS_INT_EN0, sys_int_mask, sys_int_val); + rsnd_mod_bset(mod, SCU_SYS_INT_EN1, sys_int_mask, sys_int_val); +} + +static void rsnd_src_error_clear_gen2(struct rsnd_mod *mod) +{ + u32 val = OUF_SRC(rsnd_mod_id(mod)); + + rsnd_mod_bset(mod, SCU_SYS_STATUS0, val, val); + rsnd_mod_bset(mod, SCU_SYS_STATUS1, val, val); +} + +static bool rsnd_src_error_record_gen2(struct rsnd_mod *mod) +{ + u32 val = OUF_SRC(rsnd_mod_id(mod)); + bool ret = false; + + if ((rsnd_mod_read(mod, SCU_SYS_STATUS0) & val) || + (rsnd_mod_read(mod, SCU_SYS_STATUS1) & val)) { + struct rsnd_src *src = rsnd_mod_to_src(mod); + + src->err++; + ret = true; + } + + /* clear error static */ + rsnd_src_error_clear_gen2(mod); + + return ret; +} + +static int _rsnd_src_start_gen2(struct rsnd_mod *mod) +{ + struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); + u32 val = rsnd_io_to_mod_dvc(io) ? 0x01 : 0x11; + + rsnd_mod_write(mod, SRC_CTRL, val); + + rsnd_src_error_clear_gen2(mod); + + rsnd_src_start(mod); + + rsnd_src_irq_enable_gen2(mod); + + return 0; +} + +static int _rsnd_src_stop_gen2(struct rsnd_mod *mod) +{ + rsnd_src_irq_disable_gen2(mod); + + rsnd_mod_write(mod, SRC_CTRL, 0); + + rsnd_src_error_record_gen2(mod); + + return rsnd_src_stop(mod); +} + +static irqreturn_t rsnd_src_interrupt_gen2(int irq, void *data) +{ + struct rsnd_mod *mod = data; + struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); + + if (!io) + return IRQ_NONE; + + if (rsnd_src_error_record_gen2(mod)) { + struct rsnd_priv *priv = rsnd_mod_to_priv(mod); + struct rsnd_src *src = rsnd_mod_to_src(mod); + struct device *dev = rsnd_priv_to_dev(priv); + + dev_dbg(dev, "%s[%d] restart\n", + rsnd_mod_name(mod), rsnd_mod_id(mod)); + + _rsnd_src_stop_gen2(mod); + if (src->err < 1024) + _rsnd_src_start_gen2(mod); + else + dev_warn(dev, "no more SRC restart\n"); + } + + return IRQ_HANDLED; +} + +static int rsnd_src_set_convert_rate_gen2(struct rsnd_mod *mod) +{ + struct rsnd_priv *priv = rsnd_mod_to_priv(mod); + struct device *dev = rsnd_priv_to_dev(priv); + struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); + struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); + struct rsnd_src *src = rsnd_mod_to_src(mod); + u32 convert_rate = rsnd_src_convert_rate(src); + u32 cr, route; + uint ratio; + int ret; + + /* 6 - 1/6 are very enough ratio for SRC_BSDSR */ + if (!convert_rate) + ratio = 0; + else if (convert_rate > runtime->rate) + ratio = 100 * convert_rate / runtime->rate; + else + ratio = 100 * runtime->rate / convert_rate; + + if (ratio > 600) { + dev_err(dev, "FSO/FSI ratio error\n"); + return -EINVAL; + } + + ret = rsnd_src_set_convert_rate(mod); + if (ret < 0) + return ret; + + cr = 0x00011110; + route = 0x0; + if (convert_rate) { + route = 0x1; + + if (rsnd_enable_sync_convert(src)) { + cr |= 0x1; + route |= rsnd_io_is_play(io) ? + (0x1 << 24) : (0x1 << 25); + } + } + + rsnd_mod_write(mod, SRC_SRCCR, cr); + rsnd_mod_write(mod, SRC_ROUTE_MODE0, route); + + switch (rsnd_mod_id(mod)) { + case 5: + case 6: + case 7: + case 8: + rsnd_mod_write(mod, SRC_BSDSR, 0x02400000); + break; + default: + rsnd_mod_write(mod, SRC_BSDSR, 0x01800000); + break; + } + + rsnd_mod_write(mod, SRC_BSISR, 0x00100060); + + return 0; +} + +static int rsnd_src_set_convert_timing_gen2(struct rsnd_mod *mod) +{ + struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); + struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); + struct rsnd_src *src = rsnd_mod_to_src(mod); + u32 convert_rate = rsnd_src_convert_rate(src); + int ret; + + if (convert_rate) + ret = rsnd_adg_set_convert_clk_gen2(mod, io, + runtime->rate, + convert_rate); + else + ret = rsnd_adg_set_convert_timing_gen2(mod, io); + + return ret; +} + +static int rsnd_src_probe_gen2(struct rsnd_mod *mod, + struct rsnd_priv *priv) +{ + struct rsnd_src *src = rsnd_mod_to_src(mod); + struct device *dev = rsnd_priv_to_dev(priv); + int irq = src->info->irq; + int ret; + + if (irq > 0) { + /* + * IRQ is not supported on non-DT + * see + * rsnd_src_irq_enable_gen2() + */ + ret = devm_request_irq(dev, irq, + rsnd_src_interrupt_gen2, + IRQF_SHARED, + dev_name(dev), mod); + if (ret) + return ret; + } + + ret = rsnd_dma_init(priv, + rsnd_mod_to_dma(mod), + src->info->dma_id); + + return ret; +} + +static int rsnd_src_remove_gen2(struct rsnd_mod *mod, + struct rsnd_priv *priv) +{ + rsnd_dma_quit(rsnd_mod_to_dma(mod)); + + return 0; +} + +static int rsnd_src_init_gen2(struct rsnd_mod *mod, + struct rsnd_priv *priv) +{ + int ret; + + ret = rsnd_src_init(mod, priv); + if (ret < 0) + return ret; + + ret = rsnd_src_set_convert_rate_gen2(mod); + if (ret < 0) + return ret; + + ret = rsnd_src_set_convert_timing_gen2(mod); + if (ret < 0) + return ret; + + return 0; +} + +static int rsnd_src_start_gen2(struct rsnd_mod *mod, + struct rsnd_priv *priv) +{ + rsnd_dma_start(rsnd_mod_to_dma(mod)); + + return _rsnd_src_start_gen2(mod); +} + +static int rsnd_src_stop_gen2(struct rsnd_mod *mod, + struct rsnd_priv *priv) +{ + int ret; + + ret = _rsnd_src_stop_gen2(mod); + + rsnd_dma_stop(rsnd_mod_to_dma(mod)); + + return ret; +} + +static void rsnd_src_reconvert_update(struct rsnd_mod *mod) +{ + struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); + struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); + struct rsnd_src *src = rsnd_mod_to_src(mod); + u32 convert_rate = rsnd_src_convert_rate(src); + u32 fsrate; + + if (!runtime) + return; + + if (!convert_rate) + convert_rate = runtime->rate; + + fsrate = 0x0400000 / convert_rate * runtime->rate; + + /* update IFS */ + rsnd_mod_write(mod, SRC_IFSVR, fsrate); +} + +static int rsnd_src_pcm_new(struct rsnd_mod *mod, + struct snd_soc_pcm_runtime *rtd) +{ + struct rsnd_priv *priv = rsnd_mod_to_priv(mod); + struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); + struct rsnd_dai *rdai = rsnd_io_to_rdai(io); + struct rsnd_src *src = rsnd_mod_to_src(mod); + int ret; + + /* + * enable SRC sync convert if possible + */ + + /* + * Gen1 is not supported + */ + if (rsnd_is_gen1(priv)) + return 0; + + /* + * SRC sync convert needs clock master + */ + if (!rsnd_rdai_is_clk_master(rdai)) + return 0; + + /* + * We can't use SRC sync convert + * if it has DVC + */ + if (rsnd_io_to_mod_dvc(io)) + return 0; + + /* + * enable sync convert + */ + ret = rsnd_kctrl_new_s(mod, rtd, + rsnd_io_is_play(io) ? + "SRC Out Rate Switch" : + "SRC In Rate Switch", + rsnd_src_reconvert_update, + &src->sen, 1); + if (ret < 0) + return ret; + + ret = rsnd_kctrl_new_s(mod, rtd, + rsnd_io_is_play(io) ? + "SRC Out Rate" : + "SRC In Rate", + rsnd_src_reconvert_update, + &src->sync, 192000); + + return ret; +} + +static struct rsnd_mod_ops rsnd_src_gen2_ops = { + .name = SRC_NAME, + .dma_req = rsnd_src_dma_req, + .probe = rsnd_src_probe_gen2, + .remove = rsnd_src_remove_gen2, + .init = rsnd_src_init_gen2, + .quit = rsnd_src_quit, + .start = rsnd_src_start_gen2, + .stop = rsnd_src_stop_gen2, + .hw_params = rsnd_src_hw_params, + .pcm_new = rsnd_src_pcm_new, +}; + +struct rsnd_mod *rsnd_src_mod_get(struct rsnd_priv *priv, int id) +{ + if (WARN_ON(id < 0 || id >= rsnd_src_nr(priv))) + id = 0; + + return &((struct rsnd_src *)(priv->src) + id)->mod; +} + +static void rsnd_of_parse_src(struct platform_device *pdev, + const struct rsnd_of_data *of_data, + struct rsnd_priv *priv) +{ + struct device_node *src_node; + struct device_node *np; + struct rcar_snd_info *info = rsnd_priv_to_info(priv); + struct rsnd_src_platform_info *src_info; + struct device *dev = &pdev->dev; + int nr, i; + + if (!of_data) + return; + + src_node = rsnd_src_of_node(priv); + if (!src_node) + return; + + nr = of_get_child_count(src_node); + if (!nr) + goto rsnd_of_parse_src_end; + + src_info = devm_kzalloc(dev, + sizeof(struct rsnd_src_platform_info) * nr, + GFP_KERNEL); + if (!src_info) { + dev_err(dev, "src info allocation error\n"); + goto rsnd_of_parse_src_end; + } + + info->src_info = src_info; + info->src_info_nr = nr; + + i = 0; + for_each_child_of_node(src_node, np) { + src_info[i].irq = irq_of_parse_and_map(np, 0); + + i++; + } + +rsnd_of_parse_src_end: + of_node_put(src_node); +} + +int rsnd_src_probe(struct platform_device *pdev, + const struct rsnd_of_data *of_data, + struct rsnd_priv *priv) +{ + struct rcar_snd_info *info = rsnd_priv_to_info(priv); + struct device *dev = rsnd_priv_to_dev(priv); + struct rsnd_src *src; + struct rsnd_mod_ops *ops; + struct clk *clk; + char name[RSND_SRC_NAME_SIZE]; + int i, nr, ret; + + ops = NULL; + if (rsnd_is_gen1(priv)) + ops = &rsnd_src_gen1_ops; + if (rsnd_is_gen2(priv)) + ops = &rsnd_src_gen2_ops; + if (!ops) { + dev_err(dev, "unknown Generation\n"); + return -EIO; + } + + rsnd_of_parse_src(pdev, of_data, priv); + + /* + * init SRC + */ + nr = info->src_info_nr; + if (!nr) + return 0; + + src = devm_kzalloc(dev, sizeof(*src) * nr, GFP_KERNEL); + if (!src) { + dev_err(dev, "SRC allocate failed\n"); + return -ENOMEM; + } + + priv->src_nr = nr; + priv->src = src; + + for_each_rsnd_src(src, priv, i) { + snprintf(name, RSND_SRC_NAME_SIZE, "%s.%d", + SRC_NAME, i); + + clk = devm_clk_get(dev, name); + if (IS_ERR(clk)) + return PTR_ERR(clk); + + src->info = &info->src_info[i]; + + ret = rsnd_mod_init(&src->mod, ops, clk, RSND_MOD_SRC, i); + if (ret) + return ret; + } + + return 0; +} + +void rsnd_src_remove(struct platform_device *pdev, + struct rsnd_priv *priv) +{ + struct rsnd_src *src; + int i; + + for_each_rsnd_src(src, priv, i) { + rsnd_mod_quit(&src->mod); + } +} |