diff options
Diffstat (limited to 'sound/soc/sh/rcar/ssi.c')
| -rw-r--r-- | sound/soc/sh/rcar/ssi.c | 1336 |
1 files changed, 1336 insertions, 0 deletions
diff --git a/sound/soc/sh/rcar/ssi.c b/sound/soc/sh/rcar/ssi.c new file mode 100644 index 000000000..2ead44779 --- /dev/null +++ b/sound/soc/sh/rcar/ssi.c @@ -0,0 +1,1336 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Renesas R-Car SSIU/SSI support +// +// Copyright (C) 2013 Renesas Solutions Corp. +// Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> +// +// Based on fsi.c +// Kuninori Morimoto <morimoto.kuninori@renesas.com> + +/* + * you can enable below define if you don't need + * SSI interrupt status debug message when debugging + * see rsnd_dbg_irq_status() + * + * #define RSND_DEBUG_NO_IRQ_STATUS 1 + */ + +#include <sound/simple_card_utils.h> +#include <linux/delay.h> +#include "rsnd.h" +#define RSND_SSI_NAME_SIZE 16 + +/* + * SSICR + */ +#define FORCE (1 << 31) /* Fixed */ +#define DMEN (1 << 28) /* DMA Enable */ +#define UIEN (1 << 27) /* Underflow Interrupt Enable */ +#define OIEN (1 << 26) /* Overflow Interrupt Enable */ +#define IIEN (1 << 25) /* Idle Mode Interrupt Enable */ +#define DIEN (1 << 24) /* Data Interrupt Enable */ +#define CHNL_4 (1 << 22) /* Channels */ +#define CHNL_6 (2 << 22) /* Channels */ +#define CHNL_8 (3 << 22) /* Channels */ +#define DWL_MASK (7 << 19) /* Data Word Length mask */ +#define DWL_8 (0 << 19) /* Data Word Length */ +#define DWL_16 (1 << 19) /* Data Word Length */ +#define DWL_18 (2 << 19) /* Data Word Length */ +#define DWL_20 (3 << 19) /* Data Word Length */ +#define DWL_22 (4 << 19) /* Data Word Length */ +#define DWL_24 (5 << 19) /* Data Word Length */ +#define DWL_32 (6 << 19) /* Data Word Length */ + +/* + * System word length + */ +#define SWL_16 (1 << 16) /* R/W System Word Length */ +#define SWL_24 (2 << 16) /* R/W System Word Length */ +#define SWL_32 (3 << 16) /* R/W System Word Length */ + +#define SCKD (1 << 15) /* Serial Bit Clock Direction */ +#define SWSD (1 << 14) /* Serial WS Direction */ +#define SCKP (1 << 13) /* Serial Bit Clock Polarity */ +#define SWSP (1 << 12) /* Serial WS Polarity */ +#define SDTA (1 << 10) /* Serial Data Alignment */ +#define PDTA (1 << 9) /* Parallel Data Alignment */ +#define DEL (1 << 8) /* Serial Data Delay */ +#define CKDV(v) (v << 4) /* Serial Clock Division Ratio */ +#define TRMD (1 << 1) /* Transmit/Receive Mode Select */ +#define EN (1 << 0) /* SSI Module Enable */ + +/* + * SSISR + */ +#define UIRQ (1 << 27) /* Underflow Error Interrupt Status */ +#define OIRQ (1 << 26) /* Overflow Error Interrupt Status */ +#define IIRQ (1 << 25) /* Idle Mode Interrupt Status */ +#define DIRQ (1 << 24) /* Data Interrupt Status Flag */ + +/* + * SSIWSR + */ +#define CONT (1 << 8) /* WS Continue Function */ +#define WS_MODE (1 << 0) /* WS Mode */ + +#define SSI_NAME "ssi" + +struct rsnd_ssi { + struct rsnd_mod mod; + + u32 flags; + u32 cr_own; + u32 cr_clk; + u32 cr_mode; + u32 cr_en; + u32 wsr; + int chan; + int rate; + int irq; + unsigned int usrcnt; + + /* for PIO */ + int byte_pos; + int byte_per_period; + int next_period_byte; +}; + +/* flags */ +#define RSND_SSI_CLK_PIN_SHARE (1 << 0) +#define RSND_SSI_NO_BUSIF (1 << 1) /* SSI+DMA without BUSIF */ +#define RSND_SSI_PROBED (1 << 2) + +#define for_each_rsnd_ssi(pos, priv, i) \ + for (i = 0; \ + (i < rsnd_ssi_nr(priv)) && \ + ((pos) = ((struct rsnd_ssi *)(priv)->ssi + i)); \ + i++) + +#define rsnd_ssi_get(priv, id) ((struct rsnd_ssi *)(priv->ssi) + id) +#define rsnd_ssi_nr(priv) ((priv)->ssi_nr) +#define rsnd_mod_to_ssi(_mod) container_of((_mod), struct rsnd_ssi, mod) +#define rsnd_ssi_is_parent(ssi, io) ((ssi) == rsnd_io_to_mod_ssip(io)) +#define rsnd_ssi_is_multi_secondary(mod, io) \ + (rsnd_ssi_multi_secondaries(io) & (1 << rsnd_mod_id(mod))) +#define rsnd_ssi_is_run_mods(mod, io) \ + (rsnd_ssi_run_mods(io) & (1 << rsnd_mod_id(mod))) +#define rsnd_ssi_can_output_clk(mod) (!__rsnd_ssi_is_pin_sharing(mod)) + +static int rsnd_ssi_is_dma_mode(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); + int use_busif = 0; + + if (!rsnd_ssi_is_dma_mode(mod)) + return 0; + + if (!(rsnd_flags_has(ssi, RSND_SSI_NO_BUSIF))) + use_busif = 1; + if (rsnd_io_to_mod_src(io)) + use_busif = 1; + + return use_busif; +} + +static void rsnd_ssi_status_clear(struct rsnd_mod *mod) +{ + rsnd_mod_write(mod, SSISR, 0); +} + +static u32 rsnd_ssi_status_get(struct rsnd_mod *mod) +{ + return rsnd_mod_read(mod, SSISR); +} + +static void rsnd_ssi_status_check(struct rsnd_mod *mod, + u32 bit) +{ + struct rsnd_priv *priv = rsnd_mod_to_priv(mod); + struct device *dev = rsnd_priv_to_dev(priv); + u32 status; + int i; + + for (i = 0; i < 1024; i++) { + status = rsnd_ssi_status_get(mod); + if (status & bit) + return; + + udelay(5); + } + + dev_warn(dev, "%s status check failed\n", rsnd_mod_name(mod)); +} + +static u32 rsnd_ssi_multi_secondaries(struct rsnd_dai_stream *io) +{ + struct rsnd_mod *mod; + enum rsnd_mod_type types[] = { + RSND_MOD_SSIM1, + RSND_MOD_SSIM2, + RSND_MOD_SSIM3, + }; + int i, mask; + + mask = 0; + for (i = 0; i < ARRAY_SIZE(types); i++) { + mod = rsnd_io_to_mod(io, types[i]); + if (!mod) + continue; + + mask |= 1 << rsnd_mod_id(mod); + } + + return mask; +} + +static u32 rsnd_ssi_run_mods(struct rsnd_dai_stream *io) +{ + struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io); + struct rsnd_mod *ssi_parent_mod = rsnd_io_to_mod_ssip(io); + u32 mods; + + mods = rsnd_ssi_multi_secondaries_runtime(io) | + 1 << rsnd_mod_id(ssi_mod); + + if (ssi_parent_mod) + mods |= 1 << rsnd_mod_id(ssi_parent_mod); + + return mods; +} + +u32 rsnd_ssi_multi_secondaries_runtime(struct rsnd_dai_stream *io) +{ + if (rsnd_runtime_is_multi_ssi(io)) + return rsnd_ssi_multi_secondaries(io); + + return 0; +} + +static u32 rsnd_rdai_width_to_swl(struct rsnd_dai *rdai) +{ + struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai); + struct device *dev = rsnd_priv_to_dev(priv); + int width = rsnd_rdai_width_get(rdai); + + switch (width) { + case 32: return SWL_32; + case 24: return SWL_24; + case 16: return SWL_16; + } + + dev_err(dev, "unsupported slot width value: %d\n", width); + return 0; +} + +unsigned int rsnd_ssi_clk_query(struct rsnd_dai *rdai, + int param1, int param2, int *idx) +{ + struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai); + int ssi_clk_mul_table[] = { + 1, 2, 4, 8, 16, 6, 12, + }; + int j, ret; + unsigned int main_rate; + int width = rsnd_rdai_width_get(rdai); + + for (j = 0; j < ARRAY_SIZE(ssi_clk_mul_table); j++) { + + /* + * It will set SSIWSR.CONT here, but SSICR.CKDV = 000 + * with it is not allowed. (SSIWSR.WS_MODE with + * SSICR.CKDV = 000 is not allowed either). + * Skip it. See SSICR.CKDV + */ + if (j == 0) + continue; + + main_rate = width * param1 * param2 * ssi_clk_mul_table[j]; + + ret = rsnd_adg_clk_query(priv, main_rate); + if (ret < 0) + continue; + + if (idx) + *idx = j; + + return main_rate; + } + + return 0; +} + +static int rsnd_ssi_master_clk_start(struct rsnd_mod *mod, + struct rsnd_dai_stream *io) +{ + struct rsnd_priv *priv = rsnd_io_to_priv(io); + struct device *dev = rsnd_priv_to_dev(priv); + struct rsnd_dai *rdai = rsnd_io_to_rdai(io); + struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); + int chan = rsnd_runtime_channel_for_ssi(io); + int idx, ret; + unsigned int main_rate; + unsigned int rate = rsnd_io_is_play(io) ? + rsnd_src_get_out_rate(priv, io) : + rsnd_src_get_in_rate(priv, io); + + if (!rsnd_rdai_is_clk_master(rdai)) + return 0; + + if (!rsnd_ssi_can_output_clk(mod)) + return 0; + + if (rsnd_ssi_is_multi_secondary(mod, io)) + return 0; + + if (rsnd_runtime_is_tdm_split(io)) + chan = rsnd_io_converted_chan(io); + + chan = rsnd_channel_normalization(chan); + + if (ssi->usrcnt > 0) { + if (ssi->rate != rate) { + dev_err(dev, "SSI parent/child should use same rate\n"); + return -EINVAL; + } + + if (ssi->chan != chan) { + dev_err(dev, "SSI parent/child should use same chan\n"); + return -EINVAL; + } + + return 0; + } + + main_rate = rsnd_ssi_clk_query(rdai, rate, chan, &idx); + if (!main_rate) { + dev_err(dev, "unsupported clock rate\n"); + return -EIO; + } + + ret = rsnd_adg_ssi_clk_try_start(mod, main_rate); + if (ret < 0) + return ret; + + /* + * SSI clock will be output contiguously + * by below settings. + * This means, rsnd_ssi_master_clk_start() + * and rsnd_ssi_register_setup() are necessary + * for SSI parent + * + * SSICR : FORCE, SCKD, SWSD + * SSIWSR : CONT + */ + ssi->cr_clk = FORCE | rsnd_rdai_width_to_swl(rdai) | + SCKD | SWSD | CKDV(idx); + ssi->wsr = CONT; + ssi->rate = rate; + ssi->chan = chan; + + dev_dbg(dev, "%s outputs %d chan %u Hz\n", + rsnd_mod_name(mod), chan, rate); + + return 0; +} + +static void rsnd_ssi_master_clk_stop(struct rsnd_mod *mod, + struct rsnd_dai_stream *io) +{ + struct rsnd_dai *rdai = rsnd_io_to_rdai(io); + struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); + + if (!rsnd_rdai_is_clk_master(rdai)) + return; + + if (!rsnd_ssi_can_output_clk(mod)) + return; + + if (ssi->usrcnt > 1) + return; + + ssi->cr_clk = 0; + ssi->rate = 0; + ssi->chan = 0; + + rsnd_adg_ssi_clk_stop(mod); +} + +static void rsnd_ssi_config_init(struct rsnd_mod *mod, + struct rsnd_dai_stream *io) +{ + struct rsnd_dai *rdai = rsnd_io_to_rdai(io); + struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai); + struct device *dev = rsnd_priv_to_dev(priv); + struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); + struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); + u32 cr_own = ssi->cr_own; + u32 cr_mode = ssi->cr_mode; + u32 wsr = ssi->wsr; + int width; + int is_tdm, is_tdm_split; + int id = rsnd_mod_id(mod); + int i; + u32 sys_int_enable = 0; + + is_tdm = rsnd_runtime_is_tdm(io); + is_tdm_split = rsnd_runtime_is_tdm_split(io); + + if (is_tdm) + dev_dbg(dev, "TDM mode\n"); + if (is_tdm_split) + dev_dbg(dev, "TDM Split mode\n"); + + cr_own |= FORCE | rsnd_rdai_width_to_swl(rdai); + + if (rdai->bit_clk_inv) + cr_own |= SCKP; + if (rdai->frm_clk_inv && !is_tdm) + cr_own |= SWSP; + if (rdai->data_alignment) + cr_own |= SDTA; + if (rdai->sys_delay) + cr_own |= DEL; + + /* + * TDM Mode + * see + * rsnd_ssiu_init_gen2() + */ + wsr = ssi->wsr; + if (is_tdm || is_tdm_split) { + wsr |= WS_MODE; + cr_own |= CHNL_8; + } + + /* + * We shouldn't exchange SWSP after running. + * This means, parent needs to care it. + */ + if (rsnd_ssi_is_parent(mod, io)) + goto init_end; + + if (rsnd_io_is_play(io)) + cr_own |= TRMD; + + cr_own &= ~DWL_MASK; + width = snd_pcm_format_width(runtime->format); + if (is_tdm_split) { + /* + * The SWL and DWL bits in SSICR should be fixed at 32-bit + * setting when TDM split mode. + * see datasheet + * Operation :: TDM Format Split Function (TDM Split Mode) + */ + width = 32; + } + + switch (width) { + case 8: + cr_own |= DWL_8; + break; + case 16: + cr_own |= DWL_16; + break; + case 24: + cr_own |= DWL_24; + break; + case 32: + cr_own |= DWL_32; + break; + } + + 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 */ + } + + /* enable busif buffer over/under run interrupt. */ + if (is_tdm || is_tdm_split) { + switch (id) { + case 0: + case 1: + case 2: + case 3: + case 4: + for (i = 0; i < 4; i++) { + sys_int_enable = rsnd_mod_read(mod, + SSI_SYS_INT_ENABLE(i * 2)); + sys_int_enable |= 0xf << (id * 4); + rsnd_mod_write(mod, + SSI_SYS_INT_ENABLE(i * 2), + sys_int_enable); + } + + break; + case 9: + for (i = 0; i < 4; i++) { + sys_int_enable = rsnd_mod_read(mod, + SSI_SYS_INT_ENABLE((i * 2) + 1)); + sys_int_enable |= 0xf << 4; + rsnd_mod_write(mod, + SSI_SYS_INT_ENABLE((i * 2) + 1), + sys_int_enable); + } + + break; + } + } + +init_end: + ssi->cr_own = cr_own; + ssi->cr_mode = cr_mode; + ssi->wsr = wsr; +} + +static void rsnd_ssi_register_setup(struct rsnd_mod *mod) +{ + struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); + + rsnd_mod_write(mod, SSIWSR, ssi->wsr); + rsnd_mod_write(mod, SSICR, ssi->cr_own | + ssi->cr_clk | + ssi->cr_mode | + ssi->cr_en); +} + +/* + * 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); + int ret; + + if (!rsnd_ssi_is_run_mods(mod, io)) + return 0; + + ret = rsnd_ssi_master_clk_start(mod, io); + if (ret < 0) + return ret; + + ssi->usrcnt++; + + ret = rsnd_mod_power_on(mod); + if (ret < 0) + return ret; + + rsnd_ssi_config_init(mod, io); + + rsnd_ssi_register_setup(mod); + + /* clear error status */ + rsnd_ssi_status_clear(mod); + + return 0; +} + +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); + struct device *dev = rsnd_priv_to_dev(priv); + int is_tdm, is_tdm_split; + int id = rsnd_mod_id(mod); + int i; + u32 sys_int_enable = 0; + + is_tdm = rsnd_runtime_is_tdm(io); + is_tdm_split = rsnd_runtime_is_tdm_split(io); + + if (!rsnd_ssi_is_run_mods(mod, io)) + return 0; + + if (!ssi->usrcnt) { + dev_err(dev, "%s usrcnt error\n", rsnd_mod_name(mod)); + return -EIO; + } + + rsnd_ssi_master_clk_stop(mod, io); + + rsnd_mod_power_off(mod); + + ssi->usrcnt--; + + if (!ssi->usrcnt) { + ssi->cr_own = 0; + ssi->cr_mode = 0; + ssi->wsr = 0; + } + + /* disable busif buffer over/under run interrupt. */ + if (is_tdm || is_tdm_split) { + switch (id) { + case 0: + case 1: + case 2: + case 3: + case 4: + for (i = 0; i < 4; i++) { + sys_int_enable = rsnd_mod_read(mod, + SSI_SYS_INT_ENABLE(i * 2)); + sys_int_enable &= ~(0xf << (id * 4)); + rsnd_mod_write(mod, + SSI_SYS_INT_ENABLE(i * 2), + sys_int_enable); + } + + break; + case 9: + for (i = 0; i < 4; i++) { + sys_int_enable = rsnd_mod_read(mod, + SSI_SYS_INT_ENABLE((i * 2) + 1)); + sys_int_enable &= ~(0xf << 4); + rsnd_mod_write(mod, + SSI_SYS_INT_ENABLE((i * 2) + 1), + sys_int_enable); + } + + break; + } + } + + 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_dai *rdai = rsnd_io_to_rdai(io); + unsigned int fmt_width = snd_pcm_format_width(params_format(params)); + + if (fmt_width > rdai->chan_width) { + struct rsnd_priv *priv = rsnd_io_to_priv(io); + struct device *dev = rsnd_priv_to_dev(priv); + + dev_err(dev, "invalid combination of slot-width and format-data-width\n"); + return -EINVAL; + } + + return 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); + + if (!rsnd_ssi_is_run_mods(mod, io)) + return 0; + + /* + * EN will be set via SSIU :: SSI_CONTROL + * if Multi channel mode + */ + if (rsnd_ssi_multi_secondaries_runtime(io)) + return 0; + + /* + * EN is for data output. + * SSI parent EN is not needed. + */ + if (rsnd_ssi_is_parent(mod, io)) + return 0; + + ssi->cr_en = EN; + + rsnd_mod_write(mod, SSICR, ssi->cr_own | + ssi->cr_clk | + ssi->cr_mode | + ssi->cr_en); + + return 0; +} + +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); + u32 cr; + + if (!rsnd_ssi_is_run_mods(mod, io)) + return 0; + + if (rsnd_ssi_is_parent(mod, io)) + return 0; + + cr = ssi->cr_own | + ssi->cr_clk; + + /* + * disable all IRQ, + * Playback: Wait all data was sent + * Capture: It might not receave data. Do nothing + */ + if (rsnd_io_is_play(io)) { + rsnd_mod_write(mod, SSICR, cr | ssi->cr_en); + rsnd_ssi_status_check(mod, DIRQ); + } + + /* In multi-SSI mode, stop is performed by setting ssi0129 in + * SSI_CONTROL to 0 (in rsnd_ssio_stop_gen2). Do nothing here. + */ + if (rsnd_ssi_multi_secondaries_runtime(io)) + return 0; + + /* + * disable SSI, + * and, wait idle state + */ + rsnd_mod_write(mod, SSICR, cr); /* disabled all */ + rsnd_ssi_status_check(mod, IIRQ); + + ssi->cr_en = 0; + + return 0; +} + +static int rsnd_ssi_irq(struct rsnd_mod *mod, + struct rsnd_dai_stream *io, + struct rsnd_priv *priv, + int enable) +{ + u32 val = 0; + int is_tdm, is_tdm_split; + int id = rsnd_mod_id(mod); + + is_tdm = rsnd_runtime_is_tdm(io); + is_tdm_split = rsnd_runtime_is_tdm_split(io); + + if (rsnd_is_gen1(priv)) + return 0; + + if (rsnd_ssi_is_parent(mod, io)) + return 0; + + if (!rsnd_ssi_is_run_mods(mod, io)) + return 0; + + if (enable) + val = rsnd_ssi_is_dma_mode(mod) ? 0x0e000000 : 0x0f000000; + + if (is_tdm || is_tdm_split) { + switch (id) { + case 0: + case 1: + case 2: + case 3: + case 4: + case 9: + val |= 0x0000ff00; + break; + } + } + + rsnd_mod_write(mod, SSI_INT_ENABLE, val); + + return 0; +} + +static bool rsnd_ssi_pio_interrupt(struct rsnd_mod *mod, + struct rsnd_dai_stream *io); +static void __rsnd_ssi_interrupt(struct rsnd_mod *mod, + struct rsnd_dai_stream *io) +{ + struct rsnd_priv *priv = rsnd_mod_to_priv(mod); + struct device *dev = rsnd_priv_to_dev(priv); + int is_dma = rsnd_ssi_is_dma_mode(mod); + u32 status; + bool elapsed = false; + bool stop = false; + int id = rsnd_mod_id(mod); + int i; + int is_tdm, is_tdm_split; + + is_tdm = rsnd_runtime_is_tdm(io); + is_tdm_split = rsnd_runtime_is_tdm_split(io); + + spin_lock(&priv->lock); + + /* ignore all cases if not working */ + if (!rsnd_io_is_working(io)) + goto rsnd_ssi_interrupt_out; + + status = rsnd_ssi_status_get(mod); + + /* PIO only */ + if (!is_dma && (status & DIRQ)) + elapsed = rsnd_ssi_pio_interrupt(mod, io); + + /* DMA only */ + if (is_dma && (status & (UIRQ | OIRQ))) { + rsnd_dbg_irq_status(dev, "%s err status : 0x%08x\n", + rsnd_mod_name(mod), status); + + stop = true; + } + + status = 0; + + if (is_tdm || is_tdm_split) { + switch (id) { + case 0: + case 1: + case 2: + case 3: + case 4: + for (i = 0; i < 4; i++) { + status = rsnd_mod_read(mod, + SSI_SYS_STATUS(i * 2)); + status &= 0xf << (id * 4); + + if (status) { + rsnd_dbg_irq_status(dev, + "%s err status : 0x%08x\n", + rsnd_mod_name(mod), status); + rsnd_mod_write(mod, + SSI_SYS_STATUS(i * 2), + 0xf << (id * 4)); + stop = true; + } + } + break; + case 9: + for (i = 0; i < 4; i++) { + status = rsnd_mod_read(mod, + SSI_SYS_STATUS((i * 2) + 1)); + status &= 0xf << 4; + + if (status) { + rsnd_dbg_irq_status(dev, + "%s err status : 0x%08x\n", + rsnd_mod_name(mod), status); + rsnd_mod_write(mod, + SSI_SYS_STATUS((i * 2) + 1), + 0xf << 4); + stop = true; + } + } + break; + } + } + + rsnd_ssi_status_clear(mod); +rsnd_ssi_interrupt_out: + spin_unlock(&priv->lock); + + if (elapsed) + rsnd_dai_period_elapsed(io); + + if (stop) + snd_pcm_stop_xrun(io->substream); + +} + +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; +} + +static u32 *rsnd_ssi_get_status(struct rsnd_mod *mod, + struct rsnd_dai_stream *io, + enum rsnd_mod_type type) +{ + /* + * SSIP (= SSI parent) needs to be special, otherwise, + * 2nd SSI might doesn't start. see also rsnd_mod_call() + * + * We can't include parent SSI status on SSI, because we don't know + * how many SSI requests parent SSI. Thus, it is localed on "io" now. + * ex) trouble case + * Playback: SSI0 + * Capture : SSI1 (needs SSI0) + * + * 1) start Capture -> SSI0/SSI1 are started. + * 2) start Playback -> SSI0 doesn't work, because it is already + * marked as "started" on 1) + * + * OTOH, using each mod's status is good for MUX case. + * It doesn't need to start in 2nd start + * ex) + * IO-0: SRC0 -> CTU1 -+-> MUX -> DVC -> SSIU -> SSI0 + * | + * IO-1: SRC1 -> CTU2 -+ + * + * 1) start IO-0 -> start SSI0 + * 2) start IO-1 -> SSI0 doesn't need to start, because it is + * already started on 1) + */ + if (type == RSND_MOD_SSIP) + return &io->parent_ssi_status; + + return rsnd_mod_get_status(mod, io, type); +} + +/* + * SSI PIO + */ +static void rsnd_ssi_parent_attach(struct rsnd_mod *mod, + struct rsnd_dai_stream *io) +{ + struct rsnd_dai *rdai = rsnd_io_to_rdai(io); + struct rsnd_priv *priv = rsnd_mod_to_priv(mod); + + if (!__rsnd_ssi_is_pin_sharing(mod)) + return; + + if (!rsnd_rdai_is_clk_master(rdai)) + return; + + if (rsnd_ssi_is_multi_secondary(mod, io)) + return; + + switch (rsnd_mod_id(mod)) { + case 1: + case 2: + case 9: + rsnd_dai_connect(rsnd_ssi_mod_get(priv, 0), io, RSND_MOD_SSIP); + break; + case 4: + rsnd_dai_connect(rsnd_ssi_mod_get(priv, 3), io, RSND_MOD_SSIP); + break; + case 8: + rsnd_dai_connect(rsnd_ssi_mod_get(priv, 7), io, RSND_MOD_SSIP); + break; + } +} + +static int rsnd_ssi_pcm_new(struct rsnd_mod *mod, + struct rsnd_dai_stream *io, + struct snd_soc_pcm_runtime *rtd) +{ + /* + * rsnd_rdai_is_clk_master() will be enabled after set_fmt, + * and, pcm_new will be called after it. + * This function reuse pcm_new at this point. + */ + rsnd_ssi_parent_attach(mod, io); + + return 0; +} + +static int rsnd_ssi_common_probe(struct rsnd_mod *mod, + struct rsnd_dai_stream *io, + struct rsnd_priv *priv) +{ + struct device *dev = rsnd_priv_to_dev(priv); + struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); + int ret = 0; + + /* + * SSIP/SSIU/IRQ are not needed on + * SSI Multi secondaries + */ + if (rsnd_ssi_is_multi_secondary(mod, io)) + return 0; + + /* + * It can't judge ssi parent at this point + * see rsnd_ssi_pcm_new() + */ + + /* + * SSI might be called again as PIO fallback + * It is easy to manual handling for IRQ request/free + * + * OTOH, this function might be called many times if platform is + * using MIX. It needs xxx_attach() many times on xxx_probe(). + * Because of it, we can't control .probe/.remove calling count by + * mod->status. + * But it don't need to call request_irq() many times. + * Let's control it by RSND_SSI_PROBED flag. + */ + if (!rsnd_flags_has(ssi, RSND_SSI_PROBED)) { + ret = request_irq(ssi->irq, + rsnd_ssi_interrupt, + IRQF_SHARED, + dev_name(dev), mod); + + rsnd_flags_set(ssi, RSND_SSI_PROBED); + } + + return ret; +} + +static int rsnd_ssi_common_remove(struct rsnd_mod *mod, + struct rsnd_dai_stream *io, + struct rsnd_priv *priv) +{ + struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); + struct rsnd_mod *pure_ssi_mod = rsnd_io_to_mod_ssi(io); + + /* Do nothing if non SSI (= SSI parent, multi SSI) mod */ + if (pure_ssi_mod != mod) + return 0; + + /* PIO will request IRQ again */ + if (rsnd_flags_has(ssi, RSND_SSI_PROBED)) { + free_irq(ssi->irq, mod); + + rsnd_flags_del(ssi, RSND_SSI_PROBED); + } + + return 0; +} + +/* + * SSI PIO functions + */ +static bool rsnd_ssi_pio_interrupt(struct rsnd_mod *mod, + struct rsnd_dai_stream *io) +{ + struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); + struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); + u32 *buf = (u32 *)(runtime->dma_area + ssi->byte_pos); + int shift = 0; + int byte_pos; + bool elapsed = false; + + if (snd_pcm_format_width(runtime->format) == 24) + shift = 8; + + /* + * 8/16/32 data can be assesse to TDR/RDR register + * directly as 32bit data + * see rsnd_ssi_init() + */ + if (rsnd_io_is_play(io)) + rsnd_mod_write(mod, SSITDR, (*buf) << shift); + else + *buf = (rsnd_mod_read(mod, SSIRDR) >> shift); + + byte_pos = ssi->byte_pos + sizeof(*buf); + + if (byte_pos >= ssi->next_period_byte) { + int period_pos = byte_pos / ssi->byte_per_period; + + if (period_pos >= runtime->periods) { + byte_pos = 0; + period_pos = 0; + } + + ssi->next_period_byte = (period_pos + 1) * ssi->byte_per_period; + + elapsed = true; + } + + WRITE_ONCE(ssi->byte_pos, byte_pos); + + return elapsed; +} + +static int rsnd_ssi_pio_init(struct rsnd_mod *mod, + struct rsnd_dai_stream *io, + struct rsnd_priv *priv) +{ + struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); + struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); + + if (!rsnd_ssi_is_parent(mod, io)) { + ssi->byte_pos = 0; + ssi->byte_per_period = runtime->period_size * + runtime->channels * + samples_to_bytes(runtime, 1); + ssi->next_period_byte = ssi->byte_per_period; + } + + return rsnd_ssi_init(mod, io, priv); +} + +static int rsnd_ssi_pio_pointer(struct rsnd_mod *mod, + struct rsnd_dai_stream *io, + snd_pcm_uframes_t *pointer) +{ + struct rsnd_ssi *ssi = rsnd_mod_to_ssi(mod); + struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io); + + *pointer = bytes_to_frames(runtime, READ_ONCE(ssi->byte_pos)); + + return 0; +} + +static struct rsnd_mod_ops rsnd_ssi_pio_ops = { + .name = SSI_NAME, + .probe = rsnd_ssi_common_probe, + .remove = rsnd_ssi_common_remove, + .init = rsnd_ssi_pio_init, + .quit = rsnd_ssi_quit, + .start = rsnd_ssi_start, + .stop = rsnd_ssi_stop, + .irq = rsnd_ssi_irq, + .pointer = rsnd_ssi_pio_pointer, + .pcm_new = rsnd_ssi_pcm_new, + .hw_params = rsnd_ssi_hw_params, + .get_status = rsnd_ssi_get_status, +}; + +static int rsnd_ssi_dma_probe(struct rsnd_mod *mod, + struct rsnd_dai_stream *io, + struct rsnd_priv *priv) +{ + int ret; + + /* + * SSIP/SSIU/IRQ/DMA are not needed on + * SSI Multi secondaries + */ + if (rsnd_ssi_is_multi_secondary(mod, io)) + return 0; + + ret = rsnd_ssi_common_probe(mod, io, priv); + if (ret) + return ret; + + /* SSI probe might be called many times in MUX multi path */ + ret = rsnd_dma_attach(io, mod, &io->dma); + + return ret; +} + +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); + + /* + * fallback to PIO + * + * SSI .probe might be called again. + * see + * rsnd_rdai_continuance_probe() + */ + mod->ops = &rsnd_ssi_pio_ops; + + dev_info(dev, "%s fallback to PIO mode\n", rsnd_mod_name(mod)); + + return 0; +} + +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); + int is_play = rsnd_io_is_play(io); + char *name; + + /* + * It should use "rcar_sound,ssiu" on DT. + * But, we need to keep compatibility for old version. + * + * If it has "rcar_sound.ssiu", it will be used. + * If not, "rcar_sound.ssi" will be used. + * see + * rsnd_ssiu_dma_req() + * rsnd_dma_of_path() + */ + + if (rsnd_ssi_use_busif(io)) + name = is_play ? "rxu" : "txu"; + else + name = is_play ? "rx" : "tx"; + + return rsnd_dma_request_channel(rsnd_ssi_of_node(priv), + mod, name); +} + +static struct rsnd_mod_ops rsnd_ssi_dma_ops = { + .name = SSI_NAME, + .dma_req = rsnd_ssi_dma_req, + .probe = rsnd_ssi_dma_probe, + .remove = rsnd_ssi_common_remove, + .init = rsnd_ssi_init, + .quit = rsnd_ssi_quit, + .start = rsnd_ssi_start, + .stop = rsnd_ssi_stop, + .irq = rsnd_ssi_irq, + .pcm_new = rsnd_ssi_pcm_new, + .fallback = rsnd_ssi_fallback, + .hw_params = rsnd_ssi_hw_params, + .get_status = rsnd_ssi_get_status, +}; + +static int rsnd_ssi_is_dma_mode(struct rsnd_mod *mod) +{ + return mod->ops == &rsnd_ssi_dma_ops; +} + +/* + * ssi mod function + */ +static void rsnd_ssi_connect(struct rsnd_mod *mod, + struct rsnd_dai_stream *io) +{ + struct rsnd_dai *rdai = rsnd_io_to_rdai(io); + enum rsnd_mod_type types[] = { + RSND_MOD_SSI, + RSND_MOD_SSIM1, + RSND_MOD_SSIM2, + RSND_MOD_SSIM3, + }; + enum rsnd_mod_type type; + int i; + + /* try SSI -> SSIM1 -> SSIM2 -> SSIM3 */ + for (i = 0; i < ARRAY_SIZE(types); i++) { + type = types[i]; + if (!rsnd_io_to_mod(io, type)) { + rsnd_dai_connect(mod, io, type); + rsnd_rdai_channels_set(rdai, (i + 1) * 2); + rsnd_rdai_ssi_lane_set(rdai, (i + 1)); + return; + } + } +} + +void rsnd_parse_connect_ssi(struct rsnd_dai *rdai, + struct device_node *playback, + struct device_node *capture) +{ + struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai); + struct device_node *node; + struct device_node *np; + struct rsnd_mod *mod; + int i; + + node = rsnd_ssi_of_node(priv); + if (!node) + return; + + i = 0; + for_each_child_of_node(node, np) { + mod = rsnd_ssi_mod_get(priv, i); + if (np == playback) + rsnd_ssi_connect(mod, &rdai->playback); + if (np == capture) + rsnd_ssi_connect(mod, &rdai->capture); + i++; + } + + of_node_put(node); +} + +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 rsnd_mod_get(rsnd_ssi_get(priv, id)); +} + +int __rsnd_ssi_is_pin_sharing(struct rsnd_mod *mod) +{ + if (!mod) + return 0; + + return !!(rsnd_flags_has(rsnd_mod_to_ssi(mod), RSND_SSI_CLK_PIN_SHARE)); +} + +int rsnd_ssi_probe(struct rsnd_priv *priv) +{ + struct device_node *node; + struct device_node *np; + struct device *dev = rsnd_priv_to_dev(priv); + struct rsnd_mod_ops *ops; + struct clk *clk; + struct rsnd_ssi *ssi; + char name[RSND_SSI_NAME_SIZE]; + int i, nr, ret; + + node = rsnd_ssi_of_node(priv); + if (!node) + return -EINVAL; + + nr = of_get_child_count(node); + if (!nr) { + ret = -EINVAL; + goto rsnd_ssi_probe_done; + } + + ssi = devm_kcalloc(dev, nr, sizeof(*ssi), GFP_KERNEL); + if (!ssi) { + ret = -ENOMEM; + goto rsnd_ssi_probe_done; + } + + priv->ssi = ssi; + priv->ssi_nr = nr; + + i = 0; + for_each_child_of_node(node, np) { + if (!of_device_is_available(np)) + goto skip; + + ssi = rsnd_ssi_get(priv, i); + + snprintf(name, RSND_SSI_NAME_SIZE, "%s.%d", + SSI_NAME, i); + + clk = devm_clk_get(dev, name); + if (IS_ERR(clk)) { + ret = PTR_ERR(clk); + of_node_put(np); + goto rsnd_ssi_probe_done; + } + + if (of_get_property(np, "shared-pin", NULL)) + rsnd_flags_set(ssi, RSND_SSI_CLK_PIN_SHARE); + + if (of_get_property(np, "no-busif", NULL)) + rsnd_flags_set(ssi, RSND_SSI_NO_BUSIF); + + ssi->irq = irq_of_parse_and_map(np, 0); + if (!ssi->irq) { + ret = -EINVAL; + of_node_put(np); + goto rsnd_ssi_probe_done; + } + + if (of_property_read_bool(np, "pio-transfer")) + ops = &rsnd_ssi_pio_ops; + else + ops = &rsnd_ssi_dma_ops; + + ret = rsnd_mod_init(priv, rsnd_mod_get(ssi), ops, clk, + RSND_MOD_SSI, i); + if (ret) { + of_node_put(np); + goto rsnd_ssi_probe_done; + } +skip: + i++; + } + + ret = 0; + +rsnd_ssi_probe_done: + of_node_put(node); + + return ret; +} + +void rsnd_ssi_remove(struct rsnd_priv *priv) +{ + struct rsnd_ssi *ssi; + int i; + + for_each_rsnd_ssi(ssi, priv, i) { + rsnd_mod_quit(rsnd_mod_get(ssi)); + } +} |