diff options
Diffstat (limited to 'kernel/sound/soc/sh/rcar/ssi.c')
-rw-r--r-- | kernel/sound/soc/sh/rcar/ssi.c | 265 |
1 files changed, 166 insertions, 99 deletions
diff --git a/kernel/sound/soc/sh/rcar/ssi.c b/kernel/sound/soc/sh/rcar/ssi.c index 7bb9c087f..1427ec21b 100644 --- a/kernel/sound/soc/sh/rcar/ssi.c +++ b/kernel/sound/soc/sh/rcar/ssi.c @@ -66,6 +66,7 @@ struct rsnd_ssi { u32 cr_own; u32 cr_clk; + int chan; int err; unsigned int usrcnt; }; @@ -78,18 +79,17 @@ struct rsnd_ssi { #define rsnd_ssi_nr(priv) ((priv)->ssi_nr) #define rsnd_mod_to_ssi(_mod) container_of((_mod), struct rsnd_ssi, mod) -#define rsnd_dma_to_ssi(dma) rsnd_mod_to_ssi(rsnd_dma_to_mod(dma)) #define rsnd_ssi_pio_available(ssi) ((ssi)->info->irq > 0) -#define rsnd_ssi_clk_from_parent(ssi) ((ssi)->parent) +#define rsnd_ssi_parent(ssi) ((ssi)->parent) #define rsnd_ssi_mode_flags(p) ((p)->info->flags) #define rsnd_ssi_dai_id(ssi) ((ssi)->info->dai_id) #define rsnd_ssi_of_node(priv) \ of_get_child_by_name(rsnd_priv_to_dev(priv)->of_node, "rcar_sound,ssi") -int rsnd_ssi_use_busif(struct rsnd_mod *mod) +int rsnd_ssi_use_busif(struct rsnd_dai_stream *io) { + struct rsnd_mod *mod = rsnd_io_to_mod_ssi(io); struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); - struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); int use_busif = 0; if (!rsnd_ssi_is_dma_mode(mod)) @@ -128,10 +128,8 @@ static int rsnd_ssi_master_clk_start(struct rsnd_ssi *ssi, struct rsnd_priv *priv = rsnd_io_to_priv(io); struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); struct device *dev = rsnd_priv_to_dev(priv); - int i, j, ret; - int adg_clk_div_table[] = { - 1, 6, /* see adg.c */ - }; + struct rsnd_mod *mod = rsnd_mod_get(ssi); + int j, ret; int ssi_clk_mul_table[] = { 1, 2, 4, 8, 16, 6, 12, }; @@ -141,28 +139,25 @@ static int rsnd_ssi_master_clk_start(struct rsnd_ssi *ssi, /* * Find best clock, and try to start ADG */ - for (i = 0; i < ARRAY_SIZE(adg_clk_div_table); i++) { - for (j = 0; j < ARRAY_SIZE(ssi_clk_mul_table); j++) { - - /* - * this driver is assuming that - * system word is 64fs (= 2 x 32bit) - * see rsnd_ssi_init() - */ - main_rate = rate / adg_clk_div_table[i] - * 32 * 2 * ssi_clk_mul_table[j]; - - ret = rsnd_adg_ssi_clk_try_start(&ssi->mod, main_rate); - if (0 == ret) { - ssi->cr_clk = FORCE | SWL_32 | - SCKD | SWSD | CKDV(j); - - dev_dbg(dev, "%s[%d] outputs %u Hz\n", - rsnd_mod_name(&ssi->mod), - rsnd_mod_id(&ssi->mod), rate); - - return 0; - } + for (j = 0; j < ARRAY_SIZE(ssi_clk_mul_table); j++) { + + /* + * this driver is assuming that + * system word is 64fs (= 2 x 32bit) + * see rsnd_ssi_init() + */ + main_rate = rate * 32 * 2 * ssi_clk_mul_table[j]; + + ret = rsnd_adg_ssi_clk_try_start(mod, main_rate); + if (0 == ret) { + ssi->cr_clk = FORCE | SWL_32 | + SCKD | SWSD | CKDV(j); + + dev_dbg(dev, "%s[%d] outputs %u Hz\n", + rsnd_mod_name(mod), + rsnd_mod_id(mod), rate); + + return 0; } } @@ -172,8 +167,10 @@ static int rsnd_ssi_master_clk_start(struct rsnd_ssi *ssi, static void rsnd_ssi_master_clk_stop(struct rsnd_ssi *ssi) { + struct rsnd_mod *mod = rsnd_mod_get(ssi); + ssi->cr_clk = 0; - rsnd_adg_ssi_clk_stop(&ssi->mod); + rsnd_adg_ssi_clk_stop(mod); } static void rsnd_ssi_hw_start(struct rsnd_ssi *ssi, @@ -182,55 +179,62 @@ static void rsnd_ssi_hw_start(struct rsnd_ssi *ssi, struct rsnd_priv *priv = rsnd_io_to_priv(io); struct rsnd_dai *rdai = rsnd_io_to_rdai(io); struct device *dev = rsnd_priv_to_dev(priv); + struct rsnd_mod *mod = rsnd_mod_get(ssi); u32 cr_mode; u32 cr; if (0 == ssi->usrcnt) { - rsnd_mod_hw_start(&ssi->mod); + rsnd_mod_power_on(mod); if (rsnd_rdai_is_clk_master(rdai)) { - if (rsnd_ssi_clk_from_parent(ssi)) - rsnd_ssi_hw_start(ssi->parent, io); + struct rsnd_ssi *ssi_parent = rsnd_ssi_parent(ssi); + + if (ssi_parent) + rsnd_ssi_hw_start(ssi_parent, io); else rsnd_ssi_master_clk_start(ssi, io); } } - cr_mode = rsnd_ssi_is_dma_mode(&ssi->mod) ? - DMEN : /* DMA : enable DMA */ - DIEN; /* PIO : enable Data interrupt */ - + if (rsnd_ssi_is_dma_mode(mod)) { + cr_mode = UIEN | OIEN | /* over/under run */ + DMEN; /* DMA : enable DMA */ + } else { + cr_mode = DIEN; /* PIO : enable Data interrupt */ + } cr = ssi->cr_own | ssi->cr_clk | cr_mode | - UIEN | OIEN | EN; + EN; - rsnd_mod_write(&ssi->mod, SSICR, cr); + rsnd_mod_write(mod, SSICR, cr); /* enable WS continue */ if (rsnd_rdai_is_clk_master(rdai)) - rsnd_mod_write(&ssi->mod, SSIWSR, CONT); + rsnd_mod_write(mod, SSIWSR, CONT); /* clear error status */ - rsnd_mod_write(&ssi->mod, SSISR, 0); + rsnd_mod_write(mod, SSISR, 0); ssi->usrcnt++; dev_dbg(dev, "%s[%d] hw started\n", - rsnd_mod_name(&ssi->mod), rsnd_mod_id(&ssi->mod)); + rsnd_mod_name(mod), rsnd_mod_id(mod)); } -static void rsnd_ssi_hw_stop(struct rsnd_ssi *ssi) +static void rsnd_ssi_hw_stop(struct rsnd_dai_stream *io, struct rsnd_ssi *ssi) { - struct rsnd_priv *priv = rsnd_mod_to_priv(&ssi->mod); - struct rsnd_dai_stream *io = rsnd_mod_to_io(&ssi->mod); + struct rsnd_mod *mod = rsnd_mod_get(ssi); + struct rsnd_priv *priv = rsnd_mod_to_priv(mod); struct rsnd_dai *rdai = rsnd_io_to_rdai(io); struct device *dev = rsnd_priv_to_dev(priv); u32 cr; - if (0 == ssi->usrcnt) /* stop might be called without start */ + if (0 == ssi->usrcnt) { + dev_err(dev, "%s called without starting\n", __func__); return; + } ssi->usrcnt--; @@ -242,38 +246,42 @@ static void rsnd_ssi_hw_stop(struct rsnd_ssi *ssi) cr = ssi->cr_own | ssi->cr_clk; - rsnd_mod_write(&ssi->mod, SSICR, cr | EN); - rsnd_ssi_status_check(&ssi->mod, DIRQ); + rsnd_mod_write(mod, SSICR, cr | EN); + rsnd_ssi_status_check(mod, DIRQ); /* * disable SSI, * and, wait idle state */ - rsnd_mod_write(&ssi->mod, SSICR, cr); /* disabled all */ - rsnd_ssi_status_check(&ssi->mod, IIRQ); + rsnd_mod_write(mod, SSICR, cr); /* disabled all */ + rsnd_ssi_status_check(mod, IIRQ); if (rsnd_rdai_is_clk_master(rdai)) { - if (rsnd_ssi_clk_from_parent(ssi)) - rsnd_ssi_hw_stop(ssi->parent); + struct rsnd_ssi *ssi_parent = rsnd_ssi_parent(ssi); + + if (ssi_parent) + rsnd_ssi_hw_stop(io, ssi_parent); else rsnd_ssi_master_clk_stop(ssi); } - rsnd_mod_hw_stop(&ssi->mod); + rsnd_mod_power_off(mod); + + ssi->chan = 0; } dev_dbg(dev, "%s[%d] hw stopped\n", - rsnd_mod_name(&ssi->mod), rsnd_mod_id(&ssi->mod)); + rsnd_mod_name(mod), rsnd_mod_id(mod)); } /* * SSI mod common functions */ static int rsnd_ssi_init(struct rsnd_mod *mod, + struct rsnd_dai_stream *io, struct rsnd_priv *priv) { struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); - struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); struct rsnd_dai *rdai = rsnd_io_to_rdai(io); struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); u32 cr; @@ -321,6 +329,7 @@ static int rsnd_ssi_init(struct rsnd_mod *mod, } static int rsnd_ssi_quit(struct rsnd_mod *mod, + struct rsnd_dai_stream *io, struct rsnd_priv *priv) { struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); @@ -336,24 +345,57 @@ static int rsnd_ssi_quit(struct rsnd_mod *mod, return 0; } +static int rsnd_ssi_hw_params(struct rsnd_mod *mod, + struct rsnd_dai_stream *io, + struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); + struct rsnd_ssi *ssi_parent = rsnd_ssi_parent(ssi); + int chan = params_channels(params); + + /* + * Already working. + * It will happen if SSI has parent/child connection. + */ + if (ssi->usrcnt) { + /* + * it is error if child <-> parent SSI uses + * different channels. + */ + if (ssi->chan != chan) + return -EIO; + } + + /* It will be removed on rsnd_ssi_hw_stop */ + ssi->chan = chan; + if (ssi_parent) + return rsnd_ssi_hw_params(rsnd_mod_get(ssi_parent), io, + substream, params); + + return 0; +} + static void rsnd_ssi_record_error(struct rsnd_ssi *ssi, u32 status) { + struct rsnd_mod *mod = rsnd_mod_get(ssi); + /* under/over flow error */ if (status & (UIRQ | OIRQ)) { ssi->err++; /* clear error status */ - rsnd_mod_write(&ssi->mod, SSISR, 0); + rsnd_mod_write(mod, SSISR, 0); } } static int rsnd_ssi_start(struct rsnd_mod *mod, + struct rsnd_dai_stream *io, struct rsnd_priv *priv) { struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); - struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); - rsnd_src_ssiu_start(mod, rsnd_ssi_use_busif(mod)); + rsnd_src_ssiu_start(mod, io, rsnd_ssi_use_busif(io)); rsnd_ssi_hw_start(ssi, io); @@ -363,6 +405,7 @@ static int rsnd_ssi_start(struct rsnd_mod *mod, } static int rsnd_ssi_stop(struct rsnd_mod *mod, + struct rsnd_dai_stream *io, struct rsnd_priv *priv) { struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); @@ -371,24 +414,29 @@ static int rsnd_ssi_stop(struct rsnd_mod *mod, rsnd_ssi_record_error(ssi, rsnd_mod_read(mod, SSISR)); - rsnd_ssi_hw_stop(ssi); + rsnd_ssi_hw_stop(io, ssi); - rsnd_src_ssiu_stop(mod); + rsnd_src_ssiu_stop(mod, io); return 0; } -static irqreturn_t rsnd_ssi_interrupt(int irq, void *data) +static void __rsnd_ssi_interrupt(struct rsnd_mod *mod, + struct rsnd_dai_stream *io) { - struct rsnd_ssi *ssi = data; - struct rsnd_mod *mod = &ssi->mod; + struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); struct rsnd_priv *priv = rsnd_mod_to_priv(mod); - struct rsnd_dai_stream *io = rsnd_mod_to_io(mod); int is_dma = rsnd_ssi_is_dma_mode(mod); - u32 status = rsnd_mod_read(mod, SSISR); + u32 status; + bool elapsed = false; + + spin_lock(&priv->lock); + + /* ignore all cases if not working */ + if (!rsnd_io_is_working(io)) + goto rsnd_ssi_interrupt_out; - if (!io) - return IRQ_NONE; + status = rsnd_mod_read(mod, SSISR); /* PIO only */ if (!is_dma && (status & DIRQ)) { @@ -406,11 +454,11 @@ static irqreturn_t rsnd_ssi_interrupt(int irq, void *data) else *buf = rsnd_mod_read(mod, SSIRDR); - rsnd_dai_pointer_update(io, sizeof(*buf)); + elapsed = rsnd_dai_pointer_update(io, sizeof(*buf)); } - /* PIO / DMA */ - if (status & (UIRQ | OIRQ)) { + /* DMA only */ + if (is_dma && (status & (UIRQ | OIRQ))) { struct device *dev = rsnd_priv_to_dev(priv); /* @@ -419,15 +467,28 @@ static irqreturn_t rsnd_ssi_interrupt(int irq, void *data) dev_dbg(dev, "%s[%d] restart\n", rsnd_mod_name(mod), rsnd_mod_id(mod)); - rsnd_ssi_stop(mod, priv); + rsnd_ssi_stop(mod, io, priv); if (ssi->err < 1024) - rsnd_ssi_start(mod, priv); + rsnd_ssi_start(mod, io, priv); else dev_warn(dev, "no more SSI restart\n"); } rsnd_ssi_record_error(ssi, status); +rsnd_ssi_interrupt_out: + spin_unlock(&priv->lock); + + if (elapsed) + rsnd_dai_period_elapsed(io); +} + +static irqreturn_t rsnd_ssi_interrupt(int irq, void *data) +{ + struct rsnd_mod *mod = data; + + rsnd_mod_interrupt(mod, __rsnd_ssi_interrupt); + return IRQ_HANDLED; } @@ -435,6 +496,7 @@ static irqreturn_t rsnd_ssi_interrupt(int irq, void *data) * SSI PIO */ static int rsnd_ssi_pio_probe(struct rsnd_mod *mod, + struct rsnd_dai_stream *io, struct rsnd_priv *priv) { struct device *dev = rsnd_priv_to_dev(priv); @@ -444,7 +506,7 @@ static int rsnd_ssi_pio_probe(struct rsnd_mod *mod, ret = devm_request_irq(dev, ssi->info->irq, rsnd_ssi_interrupt, IRQF_SHARED, - dev_name(dev), ssi); + dev_name(dev), mod); return ret; } @@ -456,9 +518,11 @@ static struct rsnd_mod_ops rsnd_ssi_pio_ops = { .quit = rsnd_ssi_quit, .start = rsnd_ssi_start, .stop = rsnd_ssi_stop, + .hw_params = rsnd_ssi_hw_params, }; static int rsnd_ssi_dma_probe(struct rsnd_mod *mod, + struct rsnd_dai_stream *io, struct rsnd_priv *priv) { struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); @@ -469,33 +533,35 @@ static int rsnd_ssi_dma_probe(struct rsnd_mod *mod, ret = devm_request_irq(dev, ssi->info->irq, rsnd_ssi_interrupt, IRQF_SHARED, - dev_name(dev), ssi); + dev_name(dev), mod); if (ret) return ret; ret = rsnd_dma_init( - priv, rsnd_mod_to_dma(mod), + io, rsnd_mod_to_dma(mod), dma_id); return ret; } static int rsnd_ssi_dma_remove(struct rsnd_mod *mod, + struct rsnd_dai_stream *io, struct rsnd_priv *priv) { struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); struct device *dev = rsnd_priv_to_dev(priv); int irq = ssi->info->irq; - rsnd_dma_quit(rsnd_mod_to_dma(mod)); + rsnd_dma_quit(io, rsnd_mod_to_dma(mod)); /* PIO will request IRQ again */ - devm_free_irq(dev, irq, ssi); + devm_free_irq(dev, irq, mod); return 0; } static int rsnd_ssi_fallback(struct rsnd_mod *mod, + struct rsnd_dai_stream *io, struct rsnd_priv *priv) { struct device *dev = rsnd_priv_to_dev(priv); @@ -516,37 +582,39 @@ static int rsnd_ssi_fallback(struct rsnd_mod *mod, } static int rsnd_ssi_dma_start(struct rsnd_mod *mod, + struct rsnd_dai_stream *io, struct rsnd_priv *priv) { struct rsnd_dma *dma = rsnd_mod_to_dma(mod); - rsnd_dma_start(dma); + rsnd_dma_start(io, dma); - rsnd_ssi_start(mod, priv); + rsnd_ssi_start(mod, io, priv); return 0; } static int rsnd_ssi_dma_stop(struct rsnd_mod *mod, + struct rsnd_dai_stream *io, struct rsnd_priv *priv) { struct rsnd_dma *dma = rsnd_mod_to_dma(mod); - rsnd_ssi_stop(mod, priv); + rsnd_ssi_stop(mod, io, priv); - rsnd_dma_stop(dma); + rsnd_dma_stop(io, dma); return 0; } -static struct dma_chan *rsnd_ssi_dma_req(struct rsnd_mod *mod) +static struct dma_chan *rsnd_ssi_dma_req(struct rsnd_dai_stream *io, + 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); char *name; - if (rsnd_ssi_use_busif(mod)) + if (rsnd_ssi_use_busif(io)) name = is_play ? "rxu" : "txu"; else name = is_play ? "rx" : "tx"; @@ -565,6 +633,7 @@ static struct rsnd_mod_ops rsnd_ssi_dma_ops = { .start = rsnd_ssi_dma_start, .stop = rsnd_ssi_dma_stop, .fallback = rsnd_ssi_fallback, + .hw_params = rsnd_ssi_hw_params, }; int rsnd_ssi_is_dma_mode(struct rsnd_mod *mod) @@ -588,22 +657,24 @@ struct rsnd_mod *rsnd_ssi_mod_get(struct rsnd_priv *priv, int id) if (WARN_ON(id < 0 || id >= rsnd_ssi_nr(priv))) id = 0; - return &((struct rsnd_ssi *)(priv->ssi) + id)->mod; + return rsnd_mod_get((struct rsnd_ssi *)(priv->ssi) + id); } -int rsnd_ssi_is_pin_sharing(struct rsnd_mod *mod) +int __rsnd_ssi_is_pin_sharing(struct rsnd_mod *mod) { struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); return !!(rsnd_ssi_mode_flags(ssi) & RSND_SSI_CLK_PIN_SHARE); } -static void rsnd_ssi_parent_clk_setup(struct rsnd_priv *priv, struct rsnd_ssi *ssi) +static void rsnd_ssi_parent_setup(struct rsnd_priv *priv, struct rsnd_ssi *ssi) { - if (!rsnd_ssi_is_pin_sharing(&ssi->mod)) + struct rsnd_mod *mod = rsnd_mod_get(ssi); + + if (!__rsnd_ssi_is_pin_sharing(mod)) return; - switch (rsnd_mod_id(&ssi->mod)) { + switch (rsnd_mod_id(mod)) { case 1: case 2: ssi->parent = rsnd_mod_to_ssi(rsnd_ssi_mod_get(priv, 0)); @@ -629,9 +700,6 @@ static void rsnd_of_parse_ssi(struct platform_device *pdev, struct device *dev = &pdev->dev; int nr, i; - if (!of_data) - return; - node = rsnd_ssi_of_node(priv); if (!node) return; @@ -702,10 +770,8 @@ int rsnd_ssi_probe(struct platform_device *pdev, */ nr = info->ssi_info_nr; ssi = devm_kzalloc(dev, sizeof(*ssi) * nr, GFP_KERNEL); - if (!ssi) { - dev_err(dev, "SSI allocate failed\n"); + if (!ssi) return -ENOMEM; - } priv->ssi = ssi; priv->ssi_nr = nr; @@ -728,11 +794,12 @@ int rsnd_ssi_probe(struct platform_device *pdev, else if (rsnd_ssi_pio_available(ssi)) ops = &rsnd_ssi_pio_ops; - ret = rsnd_mod_init(&ssi->mod, ops, clk, RSND_MOD_SSI, i); + ret = rsnd_mod_init(priv, rsnd_mod_get(ssi), ops, clk, + RSND_MOD_SSI, i); if (ret) return ret; - rsnd_ssi_parent_clk_setup(priv, ssi); + rsnd_ssi_parent_setup(priv, ssi); } return 0; @@ -745,6 +812,6 @@ void rsnd_ssi_remove(struct platform_device *pdev, int i; for_each_rsnd_ssi(ssi, priv, i) { - rsnd_mod_quit(&ssi->mod); + rsnd_mod_quit(rsnd_mod_get(ssi)); } } |