| /* |
| * 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_mod mod; |
| struct rsnd_mod *dma; |
| struct rsnd_kctrl_cfg_s sen; /* sync convert enable */ |
| struct rsnd_kctrl_cfg_s sync; /* sync convert */ |
| u32 convert_rate; /* sampling rate convert */ |
| int irq; |
| }; |
| |
| #define RSND_SRC_NAME_SIZE 16 |
| |
| #define rsnd_src_get(priv, id) ((struct rsnd_src *)(priv->src) + id) |
| #define rsnd_src_to_dma(src) ((src)->dma) |
| #define rsnd_src_nr(priv) ((priv)->src_nr) |
| #define rsnd_enable_sync_convert(src) ((src)->sen.val) |
| |
| #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] |
| * |-----------------| |
| */ |
| |
| static void rsnd_src_activation(struct rsnd_mod *mod) |
| { |
| rsnd_mod_write(mod, SRC_SWRSR, 0); |
| rsnd_mod_write(mod, SRC_SWRSR, 1); |
| } |
| |
| static void rsnd_src_halt(struct rsnd_mod *mod) |
| { |
| rsnd_mod_write(mod, SRC_SRCIR, 1); |
| rsnd_mod_write(mod, SRC_SWRSR, 0); |
| } |
| |
| static struct dma_chan *rsnd_src_dma_req(struct rsnd_dai_stream *io, |
| struct rsnd_mod *mod) |
| { |
| struct rsnd_priv *priv = rsnd_mod_to_priv(mod); |
| int is_play = rsnd_io_is_play(io); |
| |
| return rsnd_dma_request_channel(rsnd_src_of_node(priv), |
| mod, |
| is_play ? "rx" : "tx"); |
| } |
| |
| static u32 rsnd_src_convert_rate(struct rsnd_dai_stream *io, |
| struct rsnd_src *src) |
| { |
| 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(io, src); |
| } |
| |
| if (!rate) |
| rate = runtime->rate; |
| |
| return rate; |
| } |
| |
| static int rsnd_src_hw_params(struct rsnd_mod *mod, |
| struct rsnd_dai_stream *io, |
| 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; |
| |
| /* |
| * 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 void rsnd_src_set_convert_rate(struct rsnd_dai_stream *io, |
| struct rsnd_mod *mod) |
| { |
| struct rsnd_priv *priv = rsnd_mod_to_priv(mod); |
| struct device *dev = rsnd_priv_to_dev(priv); |
| 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(io, src); |
| u32 ifscr, fsrate, adinr; |
| u32 cr, route; |
| u32 bsdsr, bsisr; |
| uint ratio; |
| |
| if (!runtime) |
| return; |
| |
| /* 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; |
| } |
| |
| /* |
| * SRC_ADINR |
| */ |
| adinr = rsnd_get_adinr_bit(mod, io) | |
| rsnd_get_adinr_chan(mod, io); |
| |
| /* |
| * SRC_IFSCR / SRC_IFSVR |
| */ |
| ifscr = 0; |
| fsrate = 0; |
| if (convert_rate) { |
| ifscr = 1; |
| fsrate = 0x0400000 / convert_rate * runtime->rate; |
| } |
| |
| /* |
| * SRC_SRCCR / SRC_ROUTE_MODE0 |
| */ |
| 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); |
| } |
| } |
| |
| /* |
| * SRC_BSDSR / SRC_BSISR |
| */ |
| switch (rsnd_mod_id(mod)) { |
| case 5: |
| case 6: |
| case 7: |
| case 8: |
| bsdsr = 0x02400000; /* 6 - 1/6 */ |
| bsisr = 0x00100060; /* 6 - 1/6 */ |
| break; |
| default: |
| bsdsr = 0x01800000; /* 6 - 1/6 */ |
| bsisr = 0x00100060 ;/* 6 - 1/6 */ |
| break; |
| } |
| |
| rsnd_mod_write(mod, SRC_ROUTE_MODE0, route); |
| |
| rsnd_mod_write(mod, SRC_SRCIR, 1); /* initialize */ |
| rsnd_mod_write(mod, SRC_ADINR, adinr); |
| rsnd_mod_write(mod, SRC_IFSCR, ifscr); |
| rsnd_mod_write(mod, SRC_IFSVR, fsrate); |
| rsnd_mod_write(mod, SRC_SRCCR, cr); |
| rsnd_mod_write(mod, SRC_BSDSR, bsdsr); |
| rsnd_mod_write(mod, SRC_BSISR, bsisr); |
| rsnd_mod_write(mod, SRC_SRCIR, 0); /* cancel initialize */ |
| |
| rsnd_mod_write(mod, SRC_I_BUSIF_MODE, 1); |
| rsnd_mod_write(mod, SRC_O_BUSIF_MODE, 1); |
| rsnd_mod_write(mod, SRC_BUSIF_DALIGN, rsnd_get_dalign(mod, io)); |
| |
| if (convert_rate) |
| rsnd_adg_set_convert_clk_gen2(mod, io, |
| runtime->rate, |
| convert_rate); |
| else |
| rsnd_adg_set_convert_timing_gen2(mod, io); |
| } |
| |
| static int rsnd_src_irq(struct rsnd_mod *mod, |
| struct rsnd_dai_stream *io, |
| struct rsnd_priv *priv, |
| int enable) |
| { |
| struct rsnd_src *src = rsnd_mod_to_src(mod); |
| u32 sys_int_val, int_val, sys_int_mask; |
| int irq = src->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_() |
| */ |
| if ((irq <= 0) || !enable) { |
| sys_int_val = 0; |
| int_val = 0; |
| } |
| |
| /* |
| * WORKAROUND |
| * |
| * ignore over flow error when rsnd_enable_sync_convert() |
| */ |
| if (rsnd_enable_sync_convert(src)) |
| sys_int_val = sys_int_val & 0xffff; |
| |
| 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); |
| |
| return 0; |
| } |
| |
| static void rsnd_src_status_clear(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_occurred(struct rsnd_mod *mod) |
| { |
| struct rsnd_src *src = rsnd_mod_to_src(mod); |
| u32 val0, val1; |
| bool ret = false; |
| |
| val0 = val1 = OUF_SRC(rsnd_mod_id(mod)); |
| |
| /* |
| * WORKAROUND |
| * |
| * ignore over flow error when rsnd_enable_sync_convert() |
| */ |
| if (rsnd_enable_sync_convert(src)) |
| val0 = val0 & 0xffff; |
| |
| if ((rsnd_mod_read(mod, SCU_SYS_STATUS0) & val0) || |
| (rsnd_mod_read(mod, SCU_SYS_STATUS1) & val1)) |
| ret = true; |
| |
| return ret; |
| } |
| |
| static int rsnd_src_start(struct rsnd_mod *mod, |
| struct rsnd_dai_stream *io, |
| struct rsnd_priv *priv) |
| { |
| struct rsnd_src *src = rsnd_mod_to_src(mod); |
| u32 val; |
| |
| /* |
| * WORKAROUND |
| * |
| * Enable SRC output if you want to use sync convert together with DVC |
| */ |
| val = (rsnd_io_to_mod_dvc(io) && !rsnd_enable_sync_convert(src)) ? |
| 0x01 : 0x11; |
| |
| rsnd_mod_write(mod, SRC_CTRL, val); |
| |
| return 0; |
| } |
| |
| static int rsnd_src_stop(struct rsnd_mod *mod, |
| struct rsnd_dai_stream *io, |
| struct rsnd_priv *priv) |
| { |
| rsnd_mod_write(mod, SRC_CTRL, 0); |
| |
| return 0; |
| } |
| |
| static int rsnd_src_init(struct rsnd_mod *mod, |
| struct rsnd_dai_stream *io, |
| struct rsnd_priv *priv) |
| { |
| struct rsnd_src *src = rsnd_mod_to_src(mod); |
| |
| rsnd_mod_power_on(mod); |
| |
| rsnd_src_activation(mod); |
| |
| rsnd_src_set_convert_rate(io, mod); |
| |
| rsnd_src_status_clear(mod); |
| |
| /* reset sync convert_rate */ |
| src->sync.val = 0; |
| |
| return 0; |
| } |
| |
| static int rsnd_src_quit(struct rsnd_mod *mod, |
| struct rsnd_dai_stream *io, |
| struct rsnd_priv *priv) |
| { |
| struct rsnd_src *src = rsnd_mod_to_src(mod); |
| |
| rsnd_src_halt(mod); |
| |
| rsnd_mod_power_off(mod); |
| |
| src->convert_rate = 0; |
| |
| /* reset sync convert_rate */ |
| src->sync.val = 0; |
| |
| return 0; |
| } |
| |
| static void __rsnd_src_interrupt(struct rsnd_mod *mod, |
| struct rsnd_dai_stream *io) |
| { |
| struct rsnd_priv *priv = rsnd_mod_to_priv(mod); |
| bool stop = false; |
| |
| spin_lock(&priv->lock); |
| |
| /* ignore all cases if not working */ |
| if (!rsnd_io_is_working(io)) |
| goto rsnd_src_interrupt_out; |
| |
| if (rsnd_src_error_occurred(mod)) |
| stop = true; |
| |
| rsnd_src_status_clear(mod); |
| rsnd_src_interrupt_out: |
| |
| spin_unlock(&priv->lock); |
| |
| if (stop) |
| snd_pcm_stop_xrun(io->substream); |
| } |
| |
| static irqreturn_t rsnd_src_interrupt(int irq, void *data) |
| { |
| struct rsnd_mod *mod = data; |
| |
| rsnd_mod_interrupt(mod, __rsnd_src_interrupt); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static int rsnd_src_probe_(struct rsnd_mod *mod, |
| struct rsnd_dai_stream *io, |
| struct rsnd_priv *priv) |
| { |
| struct rsnd_src *src = rsnd_mod_to_src(mod); |
| struct device *dev = rsnd_priv_to_dev(priv); |
| int irq = src->irq; |
| int ret; |
| |
| if (irq > 0) { |
| /* |
| * IRQ is not supported on non-DT |
| * see |
| * rsnd_src_irq() |
| */ |
| ret = devm_request_irq(dev, irq, |
| rsnd_src_interrupt, |
| IRQF_SHARED, |
| dev_name(dev), mod); |
| if (ret) |
| return ret; |
| } |
| |
| ret = rsnd_dma_attach(io, mod, &src->dma, 0); |
| |
| return ret; |
| } |
| |
| static int rsnd_src_pcm_new(struct rsnd_mod *mod, |
| struct rsnd_dai_stream *io, |
| struct snd_soc_pcm_runtime *rtd) |
| { |
| struct rsnd_dai *rdai = rsnd_io_to_rdai(io); |
| struct rsnd_mod *dvc = rsnd_io_to_mod_dvc(io); |
| struct rsnd_src *src = rsnd_mod_to_src(mod); |
| int ret; |
| |
| /* |
| * enable SRC sync convert if possible |
| */ |
| |
| /* |
| * SRC sync convert needs clock master |
| */ |
| if (!rsnd_rdai_is_clk_master(rdai)) |
| return 0; |
| |
| /* |
| * SRC In doesn't work if DVC was enabled |
| */ |
| if (dvc && !rsnd_io_is_play(io)) |
| return 0; |
| |
| /* |
| * enable sync convert |
| */ |
| ret = rsnd_kctrl_new_s(mod, io, rtd, |
| rsnd_io_is_play(io) ? |
| "SRC Out Rate Switch" : |
| "SRC In Rate Switch", |
| rsnd_src_set_convert_rate, |
| &src->sen, 1); |
| if (ret < 0) |
| return ret; |
| |
| ret = rsnd_kctrl_new_s(mod, io, rtd, |
| rsnd_io_is_play(io) ? |
| "SRC Out Rate" : |
| "SRC In Rate", |
| rsnd_src_set_convert_rate, |
| &src->sync, 192000); |
| |
| return ret; |
| } |
| |
| static struct rsnd_mod_ops rsnd_src_ops = { |
| .name = SRC_NAME, |
| .dma_req = rsnd_src_dma_req, |
| .probe = rsnd_src_probe_, |
| .init = rsnd_src_init, |
| .quit = rsnd_src_quit, |
| .start = rsnd_src_start, |
| .stop = rsnd_src_stop, |
| .irq = rsnd_src_irq, |
| .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 rsnd_mod_get(rsnd_src_get(priv, id)); |
| } |
| |
| int rsnd_src_probe(struct rsnd_priv *priv) |
| { |
| struct device_node *node; |
| struct device_node *np; |
| struct device *dev = rsnd_priv_to_dev(priv); |
| struct rsnd_src *src; |
| struct clk *clk; |
| char name[RSND_SRC_NAME_SIZE]; |
| int i, nr, ret; |
| |
| /* This driver doesn't support Gen1 at this point */ |
| if (rsnd_is_gen1(priv)) |
| return 0; |
| |
| node = rsnd_src_of_node(priv); |
| if (!node) |
| return 0; /* not used is not error */ |
| |
| nr = of_get_child_count(node); |
| if (!nr) { |
| ret = -EINVAL; |
| goto rsnd_src_probe_done; |
| } |
| |
| src = devm_kzalloc(dev, sizeof(*src) * nr, GFP_KERNEL); |
| if (!src) { |
| ret = -ENOMEM; |
| goto rsnd_src_probe_done; |
| } |
| |
| priv->src_nr = nr; |
| priv->src = src; |
| |
| i = 0; |
| for_each_child_of_node(node, np) { |
| src = rsnd_src_get(priv, i); |
| |
| snprintf(name, RSND_SRC_NAME_SIZE, "%s.%d", |
| SRC_NAME, i); |
| |
| src->irq = irq_of_parse_and_map(np, 0); |
| if (!src->irq) { |
| ret = -EINVAL; |
| goto rsnd_src_probe_done; |
| } |
| |
| clk = devm_clk_get(dev, name); |
| if (IS_ERR(clk)) { |
| ret = PTR_ERR(clk); |
| goto rsnd_src_probe_done; |
| } |
| |
| ret = rsnd_mod_init(priv, rsnd_mod_get(src), |
| &rsnd_src_ops, clk, rsnd_mod_get_status, |
| RSND_MOD_SRC, i); |
| if (ret) |
| goto rsnd_src_probe_done; |
| |
| i++; |
| } |
| |
| ret = 0; |
| |
| rsnd_src_probe_done: |
| of_node_put(node); |
| |
| return ret; |
| } |
| |
| void rsnd_src_remove(struct rsnd_priv *priv) |
| { |
| struct rsnd_src *src; |
| int i; |
| |
| for_each_rsnd_src(src, priv, i) { |
| rsnd_mod_quit(rsnd_mod_get(src)); |
| } |
| } |