diff options
Diffstat (limited to '')
-rw-r--r-- | sound/soc/sh/rcar/src.c | 735 |
1 files changed, 735 insertions, 0 deletions
diff --git a/sound/soc/sh/rcar/src.c b/sound/soc/sh/rcar/src.c new file mode 100644 index 0000000000..f832165e46 --- /dev/null +++ b/sound/soc/sh/rcar/src.c @@ -0,0 +1,735 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Renesas R-Car SRC support +// +// Copyright (C) 2013 Renesas Solutions Corp. +// Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> + +/* + * You can use Synchronous Sampling Rate Convert (if no DVC) + * + * amixer set "SRC Out Rate" on + * aplay xxx.wav & + * amixer set "SRC Out Rate" 96000 // convert rate to 96000Hz + * amixer set "SRC Out Rate" 22050 // convert rate to 22050Hz + */ + +/* + * you can enable below define if you don't need + * SSI interrupt status debug message when debugging + * see rsnd_print_irq_status() + * + * #define RSND_DEBUG_NO_IRQ_STATUS 1 + */ + +#include "rsnd.h" + +#define SRC_NAME "src" + +/* 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 */ + int irq; +}; + +#define RSND_SRC_NAME_SIZE 16 + +#define rsnd_src_get(priv, id) ((struct rsnd_src *)(priv->src) + id) +#define rsnd_src_nr(priv) ((priv)->src_nr) +#define rsnd_src_sync_is_enabled(mod) (rsnd_mod_to_src(mod)->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 <-> +-----+ +-----+ +-------+ + * ... + * + */ + +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), + SRC_NAME, mod, + is_play ? "rx" : "tx"); +} + +static u32 rsnd_src_convert_rate(struct rsnd_dai_stream *io, + struct rsnd_mod *mod) +{ + struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); + struct rsnd_src *src = rsnd_mod_to_src(mod); + u32 convert_rate; + + if (!runtime) + return 0; + + if (!rsnd_src_sync_is_enabled(mod)) + return rsnd_io_converted_rate(io); + + convert_rate = src->sync.val; + + if (!convert_rate) + convert_rate = rsnd_io_converted_rate(io); + + if (!convert_rate) + convert_rate = runtime->rate; + + return convert_rate; +} + +unsigned int rsnd_src_get_rate(struct rsnd_priv *priv, + struct rsnd_dai_stream *io, + int is_in) +{ + struct rsnd_mod *src_mod = rsnd_io_to_mod_src(io); + struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); + unsigned int rate = 0; + int is_play = rsnd_io_is_play(io); + + /* + * Playback + * runtime_rate -> [SRC] -> convert_rate + * + * Capture + * convert_rate -> [SRC] -> runtime_rate + */ + + if (is_play == is_in) + return runtime->rate; + + /* + * return convert rate if SRC is used, + * otherwise, return runtime->rate as usual + */ + if (src_mod) + rate = rsnd_src_convert_rate(io, src_mod); + + if (!rate) + rate = runtime->rate; + + return rate; +} + +static const u32 bsdsr_table_pattern1[] = { + 0x01800000, /* 6 - 1/6 */ + 0x01000000, /* 6 - 1/4 */ + 0x00c00000, /* 6 - 1/3 */ + 0x00800000, /* 6 - 1/2 */ + 0x00600000, /* 6 - 2/3 */ + 0x00400000, /* 6 - 1 */ +}; + +static const u32 bsdsr_table_pattern2[] = { + 0x02400000, /* 6 - 1/6 */ + 0x01800000, /* 6 - 1/4 */ + 0x01200000, /* 6 - 1/3 */ + 0x00c00000, /* 6 - 1/2 */ + 0x00900000, /* 6 - 2/3 */ + 0x00600000, /* 6 - 1 */ +}; + +static const u32 bsisr_table[] = { + 0x00100060, /* 6 - 1/6 */ + 0x00100040, /* 6 - 1/4 */ + 0x00100030, /* 6 - 1/3 */ + 0x00100020, /* 6 - 1/2 */ + 0x00100020, /* 6 - 2/3 */ + 0x00100020, /* 6 - 1 */ +}; + +static const u32 chan288888[] = { + 0x00000006, /* 1 to 2 */ + 0x000001fe, /* 1 to 8 */ + 0x000001fe, /* 1 to 8 */ + 0x000001fe, /* 1 to 8 */ + 0x000001fe, /* 1 to 8 */ + 0x000001fe, /* 1 to 8 */ +}; + +static const u32 chan244888[] = { + 0x00000006, /* 1 to 2 */ + 0x0000001e, /* 1 to 4 */ + 0x0000001e, /* 1 to 4 */ + 0x000001fe, /* 1 to 8 */ + 0x000001fe, /* 1 to 8 */ + 0x000001fe, /* 1 to 8 */ +}; + +static const u32 chan222222[] = { + 0x00000006, /* 1 to 2 */ + 0x00000006, /* 1 to 2 */ + 0x00000006, /* 1 to 2 */ + 0x00000006, /* 1 to 2 */ + 0x00000006, /* 1 to 2 */ + 0x00000006, /* 1 to 2 */ +}; + +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); + int is_play = rsnd_io_is_play(io); + int use_src = 0; + u32 fin, fout; + u32 ifscr, fsrate, adinr; + u32 cr, route; + u32 i_busif, o_busif, tmp; + const u32 *bsdsr_table; + const u32 *chptn; + uint ratio; + int chan; + int idx; + + if (!runtime) + return; + + fin = rsnd_src_get_in_rate(priv, io); + fout = rsnd_src_get_out_rate(priv, io); + + chan = rsnd_runtime_channel_original(io); + + /* 6 - 1/6 are very enough ratio for SRC_BSDSR */ + if (fin == fout) + ratio = 0; + else if (fin > fout) + ratio = 100 * fin / fout; + else + ratio = 100 * fout / fin; + + if (ratio > 600) { + dev_err(dev, "FSO/FSI ratio error\n"); + return; + } + + use_src = (fin != fout) | rsnd_src_sync_is_enabled(mod); + + /* + * SRC_ADINR + */ + adinr = rsnd_get_adinr_bit(mod, io) | chan; + + /* + * SRC_IFSCR / SRC_IFSVR + */ + ifscr = 0; + fsrate = 0; + if (use_src) { + u64 n; + + ifscr = 1; + n = (u64)0x0400000 * fin; + do_div(n, fout); + fsrate = n; + } + + /* + * SRC_SRCCR / SRC_ROUTE_MODE0 + */ + cr = 0x00011110; + route = 0x0; + if (use_src) { + route = 0x1; + + if (rsnd_src_sync_is_enabled(mod)) { + cr |= 0x1; + route |= rsnd_io_is_play(io) ? + (0x1 << 24) : (0x1 << 25); + } + } + + /* + * SRC_BSDSR / SRC_BSISR + * + * see + * Combination of Register Setting Related to + * FSO/FSI Ratio and Channel, Latency + */ + switch (rsnd_mod_id(mod)) { + case 0: + chptn = chan288888; + bsdsr_table = bsdsr_table_pattern1; + break; + case 1: + case 3: + case 4: + chptn = chan244888; + bsdsr_table = bsdsr_table_pattern1; + break; + case 2: + case 9: + chptn = chan222222; + bsdsr_table = bsdsr_table_pattern1; + break; + case 5: + case 6: + case 7: + case 8: + chptn = chan222222; + bsdsr_table = bsdsr_table_pattern2; + break; + default: + goto convert_rate_err; + } + + /* + * E3 need to overwrite + */ + if (rsnd_is_e3(priv)) + switch (rsnd_mod_id(mod)) { + case 0: + case 4: + chptn = chan222222; + } + + for (idx = 0; idx < ARRAY_SIZE(chan222222); idx++) + if (chptn[idx] & (1 << chan)) + break; + + if (chan > 8 || + idx >= ARRAY_SIZE(chan222222)) + goto convert_rate_err; + + /* BUSIF_MODE */ + tmp = rsnd_get_busif_shift(io, mod); + i_busif = ( is_play ? tmp : 0) | 1; + o_busif = (!is_play ? tmp : 0) | 1; + + 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_table[idx]); + rsnd_mod_write(mod, SRC_BSISR, bsisr_table[idx]); + rsnd_mod_write(mod, SRC_SRCIR, 0); /* cancel initialize */ + + rsnd_mod_write(mod, SRC_I_BUSIF_MODE, i_busif); + rsnd_mod_write(mod, SRC_O_BUSIF_MODE, o_busif); + + rsnd_mod_write(mod, SRC_BUSIF_DALIGN, rsnd_get_dalign(mod, io)); + + rsnd_adg_set_src_timesel_gen2(mod, io, fin, fout); + + return; + +convert_rate_err: + dev_err(dev, "unknown BSDSR/BSDIR settings\n"); +} + +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_src_sync_is_enabled() + */ + if (rsnd_src_sync_is_enabled(mod)) + 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_write(mod, SCU_SYS_STATUS0, val); + rsnd_mod_write(mod, SCU_SYS_STATUS1, val); +} + +static bool rsnd_src_error_occurred(struct rsnd_mod *mod) +{ + struct rsnd_priv *priv = rsnd_mod_to_priv(mod); + struct device *dev = rsnd_priv_to_dev(priv); + u32 val0, val1; + u32 status0, status1; + bool ret = false; + + val0 = val1 = OUF_SRC(rsnd_mod_id(mod)); + + /* + * WORKAROUND + * + * ignore over flow error when rsnd_src_sync_is_enabled() + */ + if (rsnd_src_sync_is_enabled(mod)) + val0 = val0 & 0xffff; + + status0 = rsnd_mod_read(mod, SCU_SYS_STATUS0); + status1 = rsnd_mod_read(mod, SCU_SYS_STATUS1); + if ((status0 & val0) || (status1 & val1)) { + rsnd_print_irq_status(dev, "%s err status : 0x%08x, 0x%08x\n", + rsnd_mod_name(mod), status0, status1); + + ret = true; + } + + return ret; +} + +static int rsnd_src_start(struct rsnd_mod *mod, + struct rsnd_dai_stream *io, + struct rsnd_priv *priv) +{ + u32 val; + + /* + * WORKAROUND + * + * Enable SRC output if you want to use sync convert together with DVC + */ + val = (rsnd_io_to_mod_dvc(io) && !rsnd_src_sync_is_enabled(mod)) ? + 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); + int ret; + + /* reset sync convert_rate */ + src->sync.val = 0; + + ret = rsnd_mod_power_on(mod); + if (ret < 0) + return ret; + + rsnd_src_activation(mod); + + rsnd_src_set_convert_rate(io, mod); + + rsnd_src_status_clear(mod); + + 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); + + /* 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); + + 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_src *src = rsnd_mod_to_src(mod); + int ret; + + /* + * enable SRC sync convert if possible + */ + + /* + * It can't use SRC Synchronous convert + * when Capture if it uses CMD + */ + if (rsnd_io_to_mod_cmd(io) && !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_kctrl_accept_anytime, + 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_kctrl_accept_runtime, + rsnd_src_set_convert_rate, + &src->sync, 192000); + + return ret; +} + +#ifdef CONFIG_DEBUG_FS +static void rsnd_src_debug_info(struct seq_file *m, + struct rsnd_dai_stream *io, + struct rsnd_mod *mod) +{ + rsnd_debugfs_mod_reg_show(m, mod, RSND_GEN2_SCU, + rsnd_mod_id(mod) * 0x20, 0x20); + seq_puts(m, "\n"); + rsnd_debugfs_mod_reg_show(m, mod, RSND_GEN2_SCU, + 0x1c0, 0x20); + seq_puts(m, "\n"); + rsnd_debugfs_mod_reg_show(m, mod, RSND_GEN2_SCU, + 0x200 + rsnd_mod_id(mod) * 0x40, 0x40); +} +#define DEBUG_INFO .debug_info = rsnd_src_debug_info +#else +#define DEBUG_INFO +#endif + +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, + .pcm_new = rsnd_src_pcm_new, + .get_status = rsnd_mod_get_status, + DEBUG_INFO +}; + +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 = rsnd_node_count(priv, node, SRC_NAME); + if (!nr) { + ret = -EINVAL; + goto rsnd_src_probe_done; + } + + src = devm_kcalloc(dev, nr, sizeof(*src), 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) { + if (!of_device_is_available(np)) + goto skip; + + i = rsnd_node_fixed_index(dev, np, SRC_NAME, i); + if (i < 0) { + ret = -EINVAL; + of_node_put(np); + goto rsnd_src_probe_done; + } + + 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; + of_node_put(np); + goto rsnd_src_probe_done; + } + + clk = devm_clk_get(dev, name); + if (IS_ERR(clk)) { + ret = PTR_ERR(clk); + of_node_put(np); + goto rsnd_src_probe_done; + } + + ret = rsnd_mod_init(priv, rsnd_mod_get(src), + &rsnd_src_ops, clk, RSND_MOD_SRC, i); + if (ret) { + of_node_put(np); + goto rsnd_src_probe_done; + } + +skip: + 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)); + } +} |