diff options
Diffstat (limited to 'sound/soc/sh/rcar/ssiu.c')
| -rw-r--r-- | sound/soc/sh/rcar/ssiu.c | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/sound/soc/sh/rcar/ssiu.c b/sound/soc/sh/rcar/ssiu.c new file mode 100644 index 000000000000..3fe9e08e81a3 --- /dev/null +++ b/sound/soc/sh/rcar/ssiu.c @@ -0,0 +1,225 @@ +/* + * Renesas R-Car SSIU support + * + * Copyright (c) 2015 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 SSIU_NAME "ssiu" + +struct rsnd_ssiu { + struct rsnd_mod mod; +}; + +#define rsnd_ssiu_nr(priv) ((priv)->ssiu_nr) +#define for_each_rsnd_ssiu(pos, priv, i) \ + for (i = 0; \ + (i < rsnd_ssiu_nr(priv)) && \ + ((pos) = ((struct rsnd_ssiu *)(priv)->ssiu + i)); \ + i++) + +static int rsnd_ssiu_init(struct rsnd_mod *mod, + struct rsnd_dai_stream *io, + struct rsnd_priv *priv) +{ + struct rsnd_dai *rdai = rsnd_io_to_rdai(io); + u32 multi_ssi_slaves = rsnd_ssi_multi_slaves(io); + int use_busif = rsnd_ssi_use_busif(io); + int id = rsnd_mod_id(mod); + u32 mask1, val1; + u32 mask2, val2; + + /* + * SSI_MODE0 + */ + rsnd_mod_bset(mod, SSI_MODE0, (1 << id), !use_busif << id); + + /* + * SSI_MODE1 + */ + mask1 = (1 << 4) | (1 << 20); /* mask sync bit */ + mask2 = (1 << 4); /* mask sync bit */ + val1 = val2 = 0; + if (rsnd_ssi_is_pin_sharing(io)) { + int shift = -1; + + switch (id) { + case 1: + shift = 0; + break; + case 2: + shift = 2; + break; + case 4: + shift = 16; + break; + default: + return -EINVAL; + } + + mask1 |= 0x3 << shift; + val1 = rsnd_rdai_is_clk_master(rdai) ? + 0x2 << shift : 0x1 << shift; + + } else if (multi_ssi_slaves) { + + mask2 |= 0x00000007; + mask1 |= 0x0000000f; + + switch (multi_ssi_slaves) { + case 0x0206: /* SSI0/1/2/9 */ + val2 = (1 << 4) | /* SSI0129 sync */ + rsnd_rdai_is_clk_master(rdai) ? 0x2 : 0x1; + /* fall through */ + case 0x0006: /* SSI0/1/2 */ + val1 = rsnd_rdai_is_clk_master(rdai) ? + 0xa : 0x5; + + if (!val2) /* SSI012 sync */ + val1 |= (1 << 4); + } + } + + rsnd_mod_bset(mod, SSI_MODE1, mask1, val1); + rsnd_mod_bset(mod, SSI_MODE2, mask2, val2); + + return 0; +} + +static struct rsnd_mod_ops rsnd_ssiu_ops_gen1 = { + .name = SSIU_NAME, + .init = rsnd_ssiu_init, +}; + +static int rsnd_ssiu_init_gen2(struct rsnd_mod *mod, + struct rsnd_dai_stream *io, + struct rsnd_priv *priv) +{ + int ret; + + ret = rsnd_ssiu_init(mod, io, priv); + if (ret < 0) + return ret; + + if (rsnd_get_slot_width(io) >= 6) { + /* + * TDM Extend Mode + * see + * rsnd_ssi_config_init() + */ + rsnd_mod_write(mod, SSI_MODE, 0x1); + } + + if (rsnd_ssi_use_busif(io)) { + u32 val = rsnd_get_dalign(mod, io); + + rsnd_mod_write(mod, SSI_BUSIF_ADINR, + rsnd_get_adinr_bit(mod, io) | + rsnd_get_adinr_chan(mod, io)); + rsnd_mod_write(mod, SSI_BUSIF_MODE, 1); + rsnd_mod_write(mod, SSI_BUSIF_DALIGN, val); + } + + return 0; +} + +static int rsnd_ssiu_start_gen2(struct rsnd_mod *mod, + struct rsnd_dai_stream *io, + struct rsnd_priv *priv) +{ + if (!rsnd_ssi_use_busif(io)) + return 0; + + rsnd_mod_write(mod, SSI_CTRL, 0x1); + + if (rsnd_ssi_multi_slaves(io)) + rsnd_mod_write(mod, SSI_CONTROL, 0x1); + + return 0; +} + +static int rsnd_ssiu_stop_gen2(struct rsnd_mod *mod, + struct rsnd_dai_stream *io, + struct rsnd_priv *priv) +{ + if (!rsnd_ssi_use_busif(io)) + return 0; + + rsnd_mod_write(mod, SSI_CTRL, 0); + + if (rsnd_ssi_multi_slaves(io)) + rsnd_mod_write(mod, SSI_CONTROL, 0); + + return 0; +} + +static struct rsnd_mod_ops rsnd_ssiu_ops_gen2 = { + .name = SSIU_NAME, + .init = rsnd_ssiu_init_gen2, + .start = rsnd_ssiu_start_gen2, + .stop = rsnd_ssiu_stop_gen2, +}; + +static struct rsnd_mod *rsnd_ssiu_mod_get(struct rsnd_priv *priv, int id) +{ + if (WARN_ON(id < 0 || id >= rsnd_ssiu_nr(priv))) + id = 0; + + return rsnd_mod_get((struct rsnd_ssiu *)(priv->ssiu) + id); +} + +int rsnd_ssiu_attach(struct rsnd_dai_stream *io, + struct rsnd_mod *ssi_mod) +{ + struct rsnd_priv *priv = rsnd_io_to_priv(io); + struct rsnd_mod *mod = rsnd_ssiu_mod_get(priv, rsnd_mod_id(ssi_mod)); + + rsnd_mod_confirm_ssi(ssi_mod); + + return rsnd_dai_connect(mod, io, mod->type); +} + +int rsnd_ssiu_probe(struct rsnd_priv *priv) +{ + struct device *dev = rsnd_priv_to_dev(priv); + struct rsnd_ssiu *ssiu; + static struct rsnd_mod_ops *ops; + int i, nr, ret; + + /* same number to SSI */ + nr = priv->ssi_nr; + ssiu = devm_kzalloc(dev, sizeof(*ssiu) * nr, GFP_KERNEL); + if (!ssiu) + return -ENOMEM; + + priv->ssiu = ssiu; + priv->ssiu_nr = nr; + + if (rsnd_is_gen1(priv)) + ops = &rsnd_ssiu_ops_gen1; + else + ops = &rsnd_ssiu_ops_gen2; + + for_each_rsnd_ssiu(ssiu, priv, i) { + ret = rsnd_mod_init(priv, rsnd_mod_get(ssiu), + ops, NULL, RSND_MOD_SSIU, i); + if (ret) + return ret; + } + + return 0; +} + +void rsnd_ssiu_remove(struct rsnd_priv *priv) +{ + struct rsnd_ssiu *ssiu; + int i; + + for_each_rsnd_ssiu(ssiu, priv, i) { + rsnd_mod_quit(rsnd_mod_get(ssiu)); + } +} |